err.no Git - linux-2.6/blob - drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  *
  14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
  15  *
  16  * Much of the design and some of the code came from serial.c
  17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  20  * Converted to pci probing and cleaned up by Jiri Slaby.
  21  *
  22  * This version supports shared IRQ's (only for PCI boards).
  23  *
  24  * $Log: cyclades.c,v $
  25  * Prevent users from opening non-existing Z ports.
  26  *
  27  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  28  * Fixed the PCI detection function to work properly on Alpha systems.
  29  * Implemented support for TIOCSERGETLSR ioctl.
  30  * Implemented full support for non-standard baud rates.
  31  *
  32  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  33  * Request PLX I/O region, although driver doesn't use it, to avoid
  34  * problems with other drivers accessing it.
  35  * Removed count for on-board buffer characters in cy_chars_in_buffer
  36  * (Cyclades-Z only).
  37  *
  38  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  39  * Driver now reports physical instead of virtual memory addresses.
  40  * Masks were added to some Cyclades-Z read accesses.
  41  * Implemented workaround for PLX9050 bug that would cause a system lockup
  42  * in certain systems, depending on the MMIO addresses allocated to the
  43  * board.
  44  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  45  * performance (Cyclom-Y only).
  46  * Code is now compliant with the new module interface (module_[init|exit]).
  47  * Make use of the PCI helper functions to access PCI resources.
  48  * Did some code "housekeeping".
  49  *
  50  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  51  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  52  *
  53  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  54  * Fixed SMP locking in Cyclom-Y interrupt handler.
  55  *
  56  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  57  * Added a new cyclades_card field called nports to allow the driver to
  58  * know the exact number of ports found by the Z firmware after its load;
  59  * RX buffer contention prevention logic on interrupt op mode revisited
  60  * (Cyclades-Z only);
  61  * Revisited printk's for Z debug;
  62  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  63  *
  64  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  65  * Fixed bug in cyz_poll that would make all ports but port 0
  66  * unable to transmit/receive data (Cyclades-Z only);
  67  * Implemented logic to prevent the RX buffer from being stuck with data
  68  * due to a driver / firmware race condition in interrupt op mode
  69  * (Cyclades-Z only);
  70  * Fixed bug in block_til_ready logic that would lead to a system crash;
  71  * Revisited cy_close spinlock usage;
  72  *
  73  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  74  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  75  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  76  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  77  * Removed CTS handling from the driver -- this is now completely handled
  78  * by the firmware (Cyclades-Z only);
  79  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  80  * Fixed handling of ASYNC_SPD_* TTY flags;
  81  * Module unload now unmaps all memory area allocated by ioremap;
  82  *
  83  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  84  * Removed CY_PROC conditional compilation;
  85  * Implemented SMP-awareness for the driver;
  86  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  87  * functions;
  88  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  89  * (irq=NN) as parameters (only for ISA boards);
  90  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  91  * ports from being configured at speeds above 115.2Kbps;
  92  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  93  * switching from working properly;
  94  * The driver now only prints IRQ info for the Cyclades-Z if it's
  95  * configured to work in interrupt mode;
  96  *
  97  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  98  * Added support for interrupt mode operation for the Z cards;
  99  * Removed the driver inactivity control for the Z;
 100  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 101  * the Z firmware is not loaded yet;
 102  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 103  * same functionality;
 104  * Implemented workaround for IRQ setting loss on the PCI configuration
 105  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 106  *
 107  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 108  * /proc entry location changed to /proc/tty/driver/cyclades;
 109  * Added support to shared IRQ's (only for PCI boards);
 110  * Added support for Cobalt Qube2 systems;
 111  * IRQ [de]allocation scheme revisited;
 112  * BREAK implementation changed in order to make use of the 'break_ctl'
 113  * TTY facility;
 114  * Fixed typo in TTY structure field 'driver_name';
 115  * Included a PCI bridge reset and EEPROM reload in the board
 116  * initialization code (for both Y and Z series).
 117  *
 118  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 119  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 120  * closed properly after a SIGINT;
 121  * Module usage counter scheme revisited;
 122  * Added support to the upcoming Y PCI boards (i.e., support to additional
 123  * PCI Device ID's).
 124  *
 125  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 126  * Removed all unnecessary page-alignement operations in ioremap calls
 127  * (ioremap is currently safe for these operations).
 128  *
 129  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 130  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 131  * order to make PLX9050-based boards work with certain motherboards.
 132  *
 133  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 134  * cy_close function now resets (correctly) the tty->closing flag;
 135  * JIFFIES_DIFF macro fixed.
 136  *
 137  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 138  * Fixed bug in cy_close function, which was not informing HW of
 139  * which port should have the reception disabled before doing so;
 140  * fixed Cyclom-8YoP hardware detection bug.
 141  *
 142  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 143  * Fixed bug in cy_close function, which causes malfunction
 144  * of one of the first 4 ports when a higher port is closed
 145  * (Cyclom-Y only).
 146  *
 147  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 148  * Fixed Cyclom-4Yo hardware detection bug.
 149  *
 150  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 151  * /proc/cyclades implementation with great collaboration of
 152  * Marc Lewis <marc@blarg.net>;
 153  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 154  * during PPP operation.
 155  *
 156  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 157  * General code review in order to comply with 2.1 kernel standards;
 158  * data loss prevention for slow devices revisited (cy_wait_until_sent
 159  * was created);
 160  * removed conditional compilation for new/old PCI structure support
 161  * (now the driver only supports the new PCI structure).
 162  *
 163  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 164  * added conditional compilation for new/old PCI structure support;
 165  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 166  *
 167  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 168  * cleaned up the data loss fix;
 169  * fixed XON/XOFF handling once more (Cyclades-Z);
 170  * general review of the driver routines;
 171  * introduction of a mechanism to prevent data loss with slow
 172  * printers, by forcing a delay before closing the port.
 173  *
 174  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 175  * fixed detection/handling of new CD1400 in Ye boards;
 176  * fixed XON/XOFF handling (Cyclades-Z);
 177  * fixed data loss caused by a premature port close;
 178  * introduction of a flag that holds the CD1400 version ID per port
 179  * (used by the CYGETCD1400VER new ioctl).
 180  *
 181  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 182  * Code review for the module cleanup routine;
 183  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 184  * includes anonymous changes regarding signal_pending.
 185  *
 186  * Revision 2.1  1997/11/01 17:42:41 ivan
 187  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 188  * BREAK fix for the Cyclades-Z boards;
 189  * driver inactivity control by FW implemented;
 190  * introduction of flag that allows driver to take advantage of
 191  * a special CD1400 feature related to HW flow control;
 192  * added support for the CD1400  rev. J (Cyclom-Y boards);
 193  * introduction of ioctls to:
 194  *  - control the rtsdtr_inv flag (Cyclom-Y);
 195  *  - control the rflow flag (Cyclom-Y);
 196  *  - adjust the polling interval (Cyclades-Z);
 197  *
 198  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 199  * Fixes related to kernel version conditional
 200  * compilation.
 201  *
 202  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 203  * Compatibility issues between kernels 2.0.x and
 204  * 2.1.x (mainly related to clear_bit function).
 205  *
 206  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 207  * Changes to define the memory window according to the
 208  * board type.
 209  *
 210  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 211  * Changes to support new cycladesZ boards.
 212  *
 213  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 214  * Merge of Bentson's and Daniel's version 1.36.4.28.
 215  * Corrects bug in cy_detect_pci: check if there are more
 216  * ports than the number of static structs allocated.
 217  * Warning message during initialization if this driver is
 218  * used with the new generation of cycladesZ boards.  Those
 219  * will be supported only in next release of the driver.
 220  * Corrects bug in cy_detect_pci and cy_detect_isa that
 221  * returned wrong number of VALID boards, when a cyclomY
 222  * was found with no serial modules connected.
 223  * Changes to use current (2.1.x) kernel subroutine names
 224  * and created macros for compilation with 2.0.x kernel,
 225  * instead of the other way around.
 226  *
 227  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 228  * Change queue_task_irq_off to queue_task_irq.
 229  * The inline function queue_task_irq_off (tqueue.h)
 230  * was removed from latest releases of 2.1.x kernel.
 231  * Use of macro __init to mark the initialization
 232  * routines, so memory can be reused.
 233  * Also incorporate implementation of critical region
 234  * in function cleanup_module() created by anonymous
 235  * linuxer.
 236  *
 237  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 238  * Change to support new firmware that solves DCD problem:
 239  * application could fail to receive SIGHUP signal when DCD
 240  * varying too fast.
 241  *
 242  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 243  * Changed for support linux versions 2.1.X.
 244  * Backward compatible with linux versions 2.0.X.
 245  * Corrected illegal use of filler field in
 246  * CH_CTRL struct.
 247  * Deleted some debug messages.
 248  *
 249  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 250  * Included check for NULL tty pointer in cyz_poll.
 251  *
 252  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 253  * Bill Foster at Blarg! Online services noticed that
 254  * some of the switch elements of -Z modem control
 255  * lacked a closing "break;"
 256  *
 257  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 258  * Changed low water threshold for buffer xmit_buf
 259  *
 260  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 261  * Marcio provided fix to modem status fetch for -Z
 262  *
 263  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 264  * improve mapping of -Z control page (thanks to Steve
 265  * Price <stevep@fa.tdktca.com> for help on this)
 266  *
 267  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 268  * shift from CPU-bound to memcopy in cyz_polling operation
 269  *
 270  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 271  * Added support to set and report higher speeds.
 272  *
 273  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 274  * Some fixes in the HW flow control for the BETA release.
 275  * Don't try to register the IRQ.
 276  *
 277  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 278  * make sure "cyc" appears in all kernel messages; all soft interrupts
 279  * handled by same routine; recognize out-of-band reception; comment
 280  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 281  * fix race condition in -Z buffer management; only -Y needs to explicitly
 282  * flush chars; tidy up some startup messages;
 283  *
 284  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 285  * shift MOD_INC_USE_COUNT location to match
 286  * serial.c; purge some diagnostic messages;
 287  *
 288  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 289  * enable modem status messages and fetch & process them; note
 290  * time of last activity type for each port; set_line_char now
 291  * supports more than line 0 and treats 0 baud correctly;
 292  * get_modem_info senses rs_status;
 293  *
 294  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 295  * barely works--now's time to turn on
 296  * more features 'til it breaks
 297  *
 298  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 299  * check more -Z board status; shorten boot message
 300  *
 301  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 302  * fix reference to ch_ctrl in startup; verify return
 303  * values from cyz_issue_cmd and cyz_update_channel;
 304  * more stuff to get modem control correct;
 305  *
 306  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 307  * more -Z stuff folded in; re-order changes to put -Z stuff
 308  * after -Y stuff (to make changes clearer)
 309  *
 310  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 311  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 312  * Add code to send break.  Clear firmware ID word at startup (so
 313  * that other code won't talk to inactive board).
 314  *
 315  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 316  * add code for -Z in set_line_char
 317  *
 318  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 319  * fold more -Z stuff (or in some cases, error messages)
 320  * into driver; add text to "don't know what to do" messages.
 321  *
 322  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 323  * moved compile-time flags near top of file; cosmetic changes
 324  * to narrow text (to allow 2-up printing); changed many declarations
 325  * to "static" to limit external symbols; shuffled code order to
 326  * coalesce -Y and -Z specific code, also to put internal functions
 327  * in order of tty_driver structure; added code to recognize -Z
 328  * ports (and for moment, do nothing or report error); add cy_startup
 329  * to parse boot command line for extra base addresses for ISA probes;
 330  *
 331  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 332  * reorder some code, fix types of some vars (int vs. long),
 333  * add cy_setup to support user declared ISA addresses
 334  *
 335  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 336  * dump ioctl based firmware load (it's now a user level
 337  * program); ensure uninitialzed ports cannot be used
 338  *
 339  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 340  * rename vars and restructure some code
 341  *
 342  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 343  * get right status back after boot load
 344  *
 345  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 346  * successfully loads firmware
 347  *
 348  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 349  * add more of the code for the boot/load ioctls
 350  *
 351  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 352  * start to add Z functionality--starting with ioctl
 353  * for loading firmware
 354  *
 355  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 356  * added code to recognize Z/PCI card at initialization; report
 357  * presence, but card is not initialized (because firmware needs
 358  * to be loaded)
 359  *
 360  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 361  * starting minor number at zero; added missing verify_area
 362  * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 363  *
 364  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 365  * remove unneeded boot message & fix CLOCAL hardware flow
 366  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 367  * remove unused diagnostic statements; minor 0 is first;
 368  *
 369  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 370  * The kernel function vremap (available only in later 1.3.xx kernels)
 371  * allows the access to memory addresses above the RAM. This revision
 372  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 373  * above 1Mb (device id 0x101).
 374  *
 375  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 376  * Some global changes to interrupt handling spilled into
 377  * this driver--mostly unused arguments in system function
 378  * calls.  Also added change by Marcio Saito which should
 379  * reduce lost interrupts at startup by fast processors.
 380  *
 381  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 382  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 383  * in 1.3.41 kernel to remove a possible race condition, extend
 384  * some error messages, and let the driver run as a loadable module
 385  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 386  * possible race condition.
 387  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 388  *
 389  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 390  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 391  * required due to reordering of driver initialization.
 392  * Drivers are now initialized *after* memory management.
 393  *
 394  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 395  * remove printk from ISR; fix typo
 396  *
 397  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 398  * Minor fixes in the PCI board support. PCI function calls in
 399  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 400  * <duncan@okay.com>. "bad serial count" message removed.
 401  *
 402  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 403  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 404  * board initialization. Changes in the boot messages. The driver
 405  * supports up to 4 boards and 64 ports by default.
 406  *
 407  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 408  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 409  *
 410  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 411  * add missing break in modem control block in ioctl switch statement
 412  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 413  *
 414  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 415  * make sure CTS flow control is set as soon as possible (thanks
 416  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 417  *
 418  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 419  * initialize defaults for receive threshold and stale data timeout;
 420  * cosmetic changes;
 421  *
 422  * Revision 1.36  1995/03/10  23:33:53  bentson
 423  * added support of chips 4-7 in 32 port Cyclom-Ye;
 424  * fix cy_interrupt pointer dereference problem
 425  * (Joe Portman <baron@aa.net>);
 426  * give better error response if open is attempted on non-existent port
 427  * (Zachariah Vaum <jchryslr@netcom.com>);
 428  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 429  * conditional compilation for -16Y on systems with fast, noisy bus;
 430  * comment out diagnostic print function;
 431  * cleaned up table of base addresses;
 432  * set receiver time-out period register to correct value,
 433  * set receive threshold to better default values,
 434  * set chip timer to more accurate 200 Hz ticking,
 435  * add code to monitor and modify receive parameters
 436  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 437  * <njs@scifi.emi.net>);
 438  *
 439  * Revision 1.35  1994/12/16  13:54:18  steffen
 440  * additional patch by Marcio Saito for board detection
 441  * Accidently left out in 1.34
 442  *
 443  * Revision 1.34  1994/12/10  12:37:12  steffen
 444  * This is the corrected version as suggested by Marcio Saito
 445  *
 446  * Revision 1.33  1994/12/01  22:41:18  bentson
 447  * add hooks to support more high speeds directly; add tytso
 448  * patch regarding CLOCAL wakeups
 449  *
 450  * Revision 1.32  1994/11/23  19:50:04  bentson
 451  * allow direct kernel control of higher signalling rates;
 452  * look for cards at additional locations
 453  *
 454  * Revision 1.31  1994/11/16  04:33:28  bentson
 455  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 456  * a problem in chars_in_buffer has been resolved by some
 457  * small changes;  this should yield smoother output
 458  *
 459  * Revision 1.30  1994/11/16  04:28:05  bentson
 460  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 461  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 462  * cy_hangup that appears to clear up much (all?) of the
 463  * DTR glitches; also he's added/cleaned-up diagnostic messages
 464  *
 465  * Revision 1.29  1994/11/16  04:16:07  bentson
 466  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 467  * operate higher speeds in same way as other serial ports;
 468  * add more serial ports (for up to two 16-port muxes).
 469  *
 470  * Revision 1.28  1994/11/04  00:13:16  root
 471  * turn off diagnostic messages
 472  *
 473  * Revision 1.27  1994/11/03  23:46:37  root
 474  * bunch of changes to bring driver into greater conformance
 475  * with the serial.c driver (looking for missed fixes)
 476  *
 477  * Revision 1.26  1994/11/03  22:40:36  root
 478  * automatic interrupt probing fixed.
 479  *
 480  * Revision 1.25  1994/11/03  20:17:02  root
 481  * start to implement auto-irq
 482  *
 483  * Revision 1.24  1994/11/03  18:01:55  root
 484  * still working on modem signals--trying not to drop DTR
 485  * during the getty/login processes
 486  *
 487  * Revision 1.23  1994/11/03  17:51:36  root
 488  * extend baud rate support; set receive threshold as function
 489  * of baud rate; fix some problems with RTS/CTS;
 490  *
 491  * Revision 1.22  1994/11/02  18:05:35  root
 492  * changed arguments to udelay to type long to get
 493  * delays to be of correct duration
 494  *
 495  * Revision 1.21  1994/11/02  17:37:30  root
 496  * employ udelay (after calibrating loops_per_second earlier
 497  * in init/main.c) instead of using home-grown delay routines
 498  *
 499  * Revision 1.20  1994/11/02  03:11:38  root
 500  * cy_chars_in_buffer forces a return value of 0 to let
 501  * login work (don't know why it does); some functions
 502  * that were returning EFAULT, now executes the code;
 503  * more work on deciding when to disable xmit interrupts;
 504  *
 505  * Revision 1.19  1994/11/01  20:10:14  root
 506  * define routine to start transmission interrupts (by enabling
 507  * transmit interrupts); directly enable/disable modem interrupts;
 508  *
 509  * Revision 1.18  1994/11/01  18:40:45  bentson
 510  * Don't always enable transmit interrupts in startup; interrupt on
 511  * TxMpty instead of TxRdy to help characters get out before shutdown;
 512  * restructure xmit interrupt to check for chars first and quit if
 513  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 514  * (to my view);
 515  *
 516  * Revision 1.17  1994/10/30  04:39:45  bentson
 517  * rename serial_driver and callout_driver to cy_serial_driver and
 518  * cy_callout_driver to avoid linkage interference; initialize
 519  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 520  * from cyclades_port structure; add paranoia check to cy_close;
 521  *
 522  * Revision 1.16  1994/10/30  01:14:33  bentson
 523  * change major numbers; add some _early_ return statements;
 524  *
 525  * Revision 1.15  1994/10/29  06:43:15  bentson
 526  * final tidying up for clean compile;  enable some error reporting
 527  *
 528  * Revision 1.14  1994/10/28  20:30:22  Bentson
 529  * lots of changes to drag the driver towards the new tty_io
 530  * structures and operation.  not expected to work, but may
 531  * compile cleanly.
 532  *
 533  * Revision 1.13  1994/07/21  23:08:57  Bentson
 534  * add some diagnostic cruft; support 24 lines (for testing
 535  * both -8Y and -16Y cards; be more thorough in servicing all
 536  * chips during interrupt; add "volatile" a few places to
 537  * circumvent compiler optimizations; fix base & offset
 538  * computations in block_til_ready (was causing chip 0 to
 539  * stop operation)
 540  *
 541  * Revision 1.12  1994/07/19  16:42:11  Bentson
 542  * add some hackery for kernel version 1.1.8; expand
 543  * error messages; refine timing for delay loops and
 544  * declare loop params volatile
 545  *
 546  * Revision 1.11  1994/06/11  21:53:10  bentson
 547  * get use of save_car right in transmit interrupt service
 548  *
 549  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 550  * add some diagnostic printing; try to fix save_car stuff
 551  *
 552  * Revision 1.10  1994/06/11  20:36:08  bentson
 553  * clean up compiler warnings
 554  *
 555  * Revision 1.9  1994/06/11  19:42:46  bentson
 556  * added a bunch of code to support modem signalling
 557  *
 558  * Revision 1.8  1994/06/11  17:57:07  bentson
 559  * recognize break & parity error
 560  *
 561  * Revision 1.7  1994/06/05  05:51:34  bentson
 562  * Reorder baud table to be monotonic; add cli to CP; discard
 563  * incoming characters and status if the line isn't open; start to
 564  * fold code into cy_throttle; start to port get_serial_info,
 565  * set_serial_info, get_modem_info, set_modem_info, and send_break
 566  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 567  * get flow control characters from tty struct; invalidate ports w/o
 568  * hardware;
 569  *
 570  * Revision 1.6  1994/05/31  18:42:21  bentson
 571  * add a loop-breaker in the interrupt service routine;
 572  * note when port is initialized so that it can be shut
 573  * down under the right conditions; receive works without
 574  * any obvious errors
 575  *
 576  * Revision 1.5  1994/05/30  00:55:02  bentson
 577  * transmit works without obvious errors
 578  *
 579  * Revision 1.4  1994/05/27  18:46:27  bentson
 580  * incorporated more code from lib_y.c; can now print short
 581  * strings under interrupt control to port zero; seems to
 582  * select ports/channels/lines correctly
 583  *
 584  * Revision 1.3  1994/05/25  22:12:44  bentson
 585  * shifting from multi-port on a card to proper multiplexor
 586  * data structures;  added skeletons of most routines
 587  *
 588  * Revision 1.2  1994/05/19  13:21:43  bentson
 589  * start to crib from other sources
 590  *
 591  */
 592
 593 #define CY_VERSION      "2.5"
 594
 595 /* If you need to install more boards than NR_CARDS, change the constant
 596    in the definition below. No other change is necessary to support up to
 597    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 598
 599 #define NR_CARDS        4
 600
 601 /*
 602    If the total number of ports is larger than NR_PORTS, change this
 603    constant in the definition below. No other change is necessary to
 604    support more boards/ports. */
 605
 606 #define NR_PORTS        256
 607
 608 #define ZE_V1_NPORTS    64
 609 #define ZO_V1   0
 610 #define ZO_V2   1
 611 #define ZE_V1   2
 612
 613 #define SERIAL_PARANOIA_CHECK
 614 #undef  CY_DEBUG_OPEN
 615 #undef  CY_DEBUG_THROTTLE
 616 #undef  CY_DEBUG_OTHER
 617 #undef  CY_DEBUG_IO
 618 #undef  CY_DEBUG_COUNT
 619 #undef  CY_DEBUG_DTR
 620 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 621 #undef  CY_DEBUG_INTERRUPTS
 622 #undef  CY_16Y_HACK
 623 #undef  CY_ENABLE_MONITORING
 624 #undef  CY_PCI_DEBUG
 625
 626 /*
 627  * Include section
 628  */
 629 #include <linux/module.h>
 630 #include <linux/errno.h>
 631 #include <linux/signal.h>
 632 #include <linux/sched.h>
 633 #include <linux/timer.h>
 634 #include <linux/interrupt.h>
 635 #include <linux/tty.h>
 636 #include <linux/tty_flip.h>
 637 #include <linux/serial.h>
 638 #include <linux/major.h>
 639 #include <linux/string.h>
 640 #include <linux/fcntl.h>
 641 #include <linux/ptrace.h>
 642 #include <linux/cyclades.h>
 643 #include <linux/mm.h>
 644 #include <linux/ioport.h>
 645 #include <linux/init.h>
 646 #include <linux/delay.h>
 647 #include <linux/spinlock.h>
 648 #include <linux/bitops.h>
 649 #include <linux/firmware.h>
 650
 651 #include <asm/system.h>
 652 #include <asm/io.h>
 653 #include <asm/irq.h>
 654 #include <asm/uaccess.h>
 655
 656 #include <linux/kernel.h>
 657 #include <linux/pci.h>
 658
 659 #include <linux/stat.h>
 660 #include <linux/proc_fs.h>
 661
 662 static void cy_throttle(struct tty_struct *tty);
 663 static void cy_send_xchar(struct tty_struct *tty, char ch);
 664
 665 #define IS_CYC_Z(card) ((card).num_chips == -1)
 666
 667 #define Z_FPGA_CHECK(card) \
 668         ((readl(&((struct RUNTIME_9060 __iomem *) \
 669                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 670
 671 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
 672                         ((card).ctl_addr))->mail_box_0)) || \
 673                         Z_FPGA_CHECK(card)) && \
 674                         (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
 675                         ((card).base_addr+ID_ADDRESS))->signature)))
 676
 677 #ifndef SERIAL_XMIT_SIZE
 678 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 679 #endif
 680 #define WAKEUP_CHARS            256
 681
 682 #define STD_COM_FLAGS (0)
 683
 684 /* firmware stuff */
 685 #define ZL_MAX_BLOCKS   16
 686 #define DRIVER_VERSION  0x02010203
 687 #define RAM_SIZE 0x80000
 688
 689 #define Z_FPGA_LOADED(X)        ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
 690
 691 enum zblock_type {
 692         ZBLOCK_PRG = 0,
 693         ZBLOCK_FPGA = 1
 694 };
 695
 696 struct zfile_header {
 697         char name[64];
 698         char date[32];
 699         char aux[32];
 700         u32 n_config;
 701         u32 config_offset;
 702         u32 n_blocks;
 703         u32 block_offset;
 704         u32 reserved[9];
 705 } __attribute__ ((packed));
 706
 707 struct zfile_config {
 708         char name[64];
 709         u32 mailbox;
 710         u32 function;
 711         u32 n_blocks;
 712         u32 block_list[ZL_MAX_BLOCKS];
 713 } __attribute__ ((packed));
 714
 715 struct zfile_block {
 716         u32 type;
 717         u32 file_offset;
 718         u32 ram_offset;
 719         u32 size;
 720 } __attribute__ ((packed));
 721
 722 static struct tty_driver *cy_serial_driver;
 723
 724 #ifdef CONFIG_ISA
 725 /* This is the address lookup table. The driver will probe for
 726    Cyclom-Y/ISA boards at all addresses in here. If you want the
 727    driver to probe addresses at a different address, add it to
 728    this table.  If the driver is probing some other board and
 729    causing problems, remove the offending address from this table.
 730    The cy_setup function extracts additional addresses from the
 731    boot options line.  The form is "cyclades=address,address..."
 732 */
 733
 734 static unsigned int cy_isa_addresses[] = {
 735         0xD0000,
 736         0xD2000,
 737         0xD4000,
 738         0xD6000,
 739         0xD8000,
 740         0xDA000,
 741         0xDC000,
 742         0xDE000,
 743         0, 0, 0, 0, 0, 0, 0, 0
 744 };
 745
 746 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 747
 748 #ifdef MODULE
 749 static long maddr[NR_CARDS];
 750 static int irq[NR_CARDS];
 751
 752 module_param_array(maddr, long, NULL, 0);
 753 module_param_array(irq, int, NULL, 0);
 754 #endif
 755
 756 #endif                          /* CONFIG_ISA */
 757
 758 /* This is the per-card data structure containing address, irq, number of
 759    channels, etc. This driver supports a maximum of NR_CARDS cards.
 760 */
 761 static struct cyclades_card cy_card[NR_CARDS];
 762
 763 static int cy_next_channel;     /* next minor available */
 764
 765 /*
 766  * This is used to look up the divisor speeds and the timeouts
 767  * We're normally limited to 15 distinct baud rates.  The extra
 768  * are accessed via settings in info->flags.
 769  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 770  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 771  *                                               HI            VHI
 772  *     20
 773  */
 774 static int baud_table[] = {
 775         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 776         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 777         230400, 0
 778 };
 779
 780 static char baud_co_25[] = {    /* 25 MHz clock option table */
 781         /* value =>    00    01   02    03    04 */
 782         /* divide by    8    32   128   512  2048 */
 783         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 784         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 785 };
 786
 787 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 788         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 789         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 790 };
 791
 792 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 793         /* value =>    00    01   02    03    04 */
 794         /* divide by    8    32   128   512  2048 */
 795         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 796         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 797         0x00
 798 };
 799
 800 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 801         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 802         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 803         0x21
 804 };
 805
 806 static char baud_cor3[] = {     /* receive threshold */
 807         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 808         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 809         0x07
 810 };
 811
 812 /*
 813  * The Cyclades driver implements HW flow control as any serial driver.
 814  * The cyclades_port structure member rflow and the vector rflow_thr
 815  * allows us to take advantage of a special feature in the CD1400 to avoid
 816  * data loss even when the system interrupt latency is too high. These flags
 817  * are to be used only with very special applications. Setting these flags
 818  * requires the use of a special cable (DTR and RTS reversed). In the new
 819  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 820  * cables.
 821  */
 822
 823 static char rflow_thr[] = {     /* rflow threshold */
 824         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 825         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 826         0x0a
 827 };
 828
 829 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 830  *  address order.  This look-up table overcomes that problem.
 831  */
 832 static int cy_chip_offset[] = { 0x0000,
 833         0x0400,
 834         0x0800,
 835         0x0C00,
 836         0x0200,
 837         0x0600,
 838         0x0A00,
 839         0x0E00
 840 };
 841
 842 /* PCI related definitions */
 843
 844 #ifdef CONFIG_PCI
 845 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 846         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },      /* PCI < 1Mb */
 847         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },      /* PCI > 1Mb */
 848         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },     /* 4Y PCI < 1Mb */
 849         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },     /* 4Y PCI > 1Mb */
 850         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },     /* 8Y PCI < 1Mb */
 851         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },     /* 8Y PCI > 1Mb */
 852         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },      /* Z PCI < 1Mb */
 853         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },      /* Z PCI > 1Mb */
 854         { }                     /* end of table */
 855 };
 856 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 857 #endif
 858
 859 static void cy_start(struct tty_struct *);
 860 static void set_line_char(struct cyclades_port *);
 861 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 862 #ifdef CONFIG_ISA
 863 static unsigned detect_isa_irq(void __iomem *);
 864 #endif                          /* CONFIG_ISA */
 865
 866 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 867
 868 #ifndef CONFIG_CYZ_INTR
 869 static void cyz_poll(unsigned long);
 870
 871 /* The Cyclades-Z polling cycle is defined by this variable */
 872 static long cyz_polling_cycle = CZ_DEF_POLL;
 873
 874 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 875
 876 #else                           /* CONFIG_CYZ_INTR */
 877 static void cyz_rx_restart(unsigned long);
 878 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 879 #endif                          /* CONFIG_CYZ_INTR */
 880
 881 static inline int serial_paranoia_check(struct cyclades_port *info,
 882                 char *name, const char *routine)
 883 {
 884 #ifdef SERIAL_PARANOIA_CHECK
 885         if (!info) {
 886                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 887                                 "in %s\n", name, routine);
 888                 return 1;
 889         }
 890
 891         if (info->magic != CYCLADES_MAGIC) {
 892                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 893                                 "struct (%s) in %s\n", name, routine);
 894                 return 1;
 895         }
 896 #endif
 897         return 0;
 898 }                               /* serial_paranoia_check */
 899
 900 /***********************************************************/
 901 /********* Start of block of Cyclom-Y specific code ********/
 902
 903 /* This routine waits up to 1000 micro-seconds for the previous
 904    command to the Cirrus chip to complete and then issues the
 905    new command.  An error is returned if the previous command
 906    didn't finish within the time limit.
 907
 908    This function is only called from inside spinlock-protected code.
 909  */
 910 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
 911 {
 912         unsigned int i;
 913
 914         /* Check to see that the previous command has completed */
 915         for (i = 0; i < 100; i++) {
 916                 if (readb(base_addr + (CyCCR << index)) == 0) {
 917                         break;
 918                 }
 919                 udelay(10L);
 920         }
 921         /* if the CCR never cleared, the previous command
 922            didn't finish within the "reasonable time" */
 923         if (i == 100)
 924                 return -1;
 925
 926         /* Issue the new command */
 927         cy_writeb(base_addr + (CyCCR << index), cmd);
 928
 929         return 0;
 930 }                               /* cyy_issue_cmd */
 931
 932 #ifdef CONFIG_ISA
 933 /* ISA interrupt detection code */
 934 static unsigned detect_isa_irq(void __iomem * address)
 935 {
 936         int irq;
 937         unsigned long irqs, flags;
 938         int save_xir, save_car;
 939         int index = 0;          /* IRQ probing is only for ISA */
 940
 941         /* forget possible initially masked and pending IRQ */
 942         irq = probe_irq_off(probe_irq_on());
 943
 944         /* Clear interrupts on the board first */
 945         cy_writeb(address + (Cy_ClrIntr << index), 0);
 946         /* Cy_ClrIntr is 0x1800 */
 947
 948         irqs = probe_irq_on();
 949         /* Wait ... */
 950         udelay(5000L);
 951
 952         /* Enable the Tx interrupts on the CD1400 */
 953         local_irq_save(flags);
 954         cy_writeb(address + (CyCAR << index), 0);
 955         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
 956
 957         cy_writeb(address + (CyCAR << index), 0);
 958         cy_writeb(address + (CySRER << index),
 959                   readb(address + (CySRER << index)) | CyTxRdy);
 960         local_irq_restore(flags);
 961
 962         /* Wait ... */
 963         udelay(5000L);
 964
 965         /* Check which interrupt is in use */
 966         irq = probe_irq_off(irqs);
 967
 968         /* Clean up */
 969         save_xir = (u_char) readb(address + (CyTIR << index));
 970         save_car = readb(address + (CyCAR << index));
 971         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
 972         cy_writeb(address + (CySRER << index),
 973                   readb(address + (CySRER << index)) & ~CyTxRdy);
 974         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
 975         cy_writeb(address + (CyCAR << index), (save_car));
 976         cy_writeb(address + (Cy_ClrIntr << index), 0);
 977         /* Cy_ClrIntr is 0x1800 */
 978
 979         return (irq > 0) ? irq : 0;
 980 }
 981 #endif                          /* CONFIG_ISA */
 982
 983 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
 984                 void __iomem *base_addr)
 985 {
 986         struct cyclades_port *info;
 987         struct tty_struct *tty;
 988         int char_count;
 989         int j, len, index = cinfo->bus_index;
 990         int save_xir, channel, save_car;
 991         char data;
 992
 993 #ifdef CY_DEBUG_INTERRUPTS
 994         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
 995 #endif
 996         /* determine the channel & change to that context */
 997         save_xir = (u_char) readb(base_addr + (CyRIR << index));
 998         channel = (u_short) (save_xir & CyIRChannel);
 999         info = &cinfo->ports[channel + chip * 4];
1000         save_car = readb(base_addr + (CyCAR << index));
1001         cy_writeb(base_addr + (CyCAR << index), save_xir);
1002
1003         /* if there is nowhere to put the data, discard it */
1004         if (info->tty == NULL) {
1005                 j = (readb(base_addr + (CyRIVR << index)) & CyIVRMask);
1006                 if (j == CyIVRRxEx) {   /* exception */
1007                         data = readb(base_addr + (CyRDSR << index));
1008                 } else {        /* normal character reception */
1009                         char_count = readb(base_addr + (CyRDCR << index));
1010                         while (char_count--)
1011                                 data = readb(base_addr + (CyRDSR << index));
1012                 }
1013                 goto end;
1014         }
1015         /* there is an open port for this data */
1016         tty = info->tty;
1017         j = readb(base_addr + (CyRIVR << index)) & CyIVRMask;
1018         if (j == CyIVRRxEx) {   /* exception */
1019                 data = readb(base_addr + (CyRDSR << index));
1020
1021                 /* For statistics only */
1022                 if (data & CyBREAK)
1023                         info->icount.brk++;
1024                 else if (data & CyFRAME)
1025                         info->icount.frame++;
1026                 else if (data & CyPARITY)
1027                         info->icount.parity++;
1028                 else if (data & CyOVERRUN)
1029                         info->icount.overrun++;
1030
1031                 if (data & info->ignore_status_mask) {
1032                         info->icount.rx++;
1033                         return;
1034                 }
1035                 if (tty_buffer_request_room(tty, 1)) {
1036                         if (data & info->read_status_mask) {
1037                                 if (data & CyBREAK) {
1038                                         tty_insert_flip_char(tty,
1039                                                 readb(base_addr + (CyRDSR <<
1040                                                         index)), TTY_BREAK);
1041                                         info->icount.rx++;
1042                                         if (info->flags & ASYNC_SAK)
1043                                                 do_SAK(tty);
1044                                 } else if (data & CyFRAME) {
1045                                         tty_insert_flip_char( tty,
1046                                                 readb(base_addr + (CyRDSR <<
1047                                                         index)), TTY_FRAME);
1048                                         info->icount.rx++;
1049                                         info->idle_stats.frame_errs++;
1050                                 } else if (data & CyPARITY) {
1051                                         /* Pieces of seven... */
1052                                         tty_insert_flip_char(tty,
1053                                                 readb(base_addr + (CyRDSR <<
1054                                                         index)), TTY_PARITY);
1055                                         info->icount.rx++;
1056                                         info->idle_stats.parity_errs++;
1057                                 } else if (data & CyOVERRUN) {
1058                                         tty_insert_flip_char(tty, 0,
1059                                                         TTY_OVERRUN);
1060                                         info->icount.rx++;
1061                                         /* If the flip buffer itself is
1062                                            overflowing, we still lose
1063                                            the next incoming character.
1064                                          */
1065                                         tty_insert_flip_char(tty,
1066                                                 readb(base_addr + (CyRDSR <<
1067                                                         index)), TTY_FRAME);
1068                                         info->icount.rx++;
1069                                         info->idle_stats.overruns++;
1070                                 /* These two conditions may imply */
1071                                 /* a normal read should be done. */
1072                                 /* } else if(data & CyTIMEOUT) { */
1073                                 /* } else if(data & CySPECHAR) { */
1074                                 } else {
1075                                         tty_insert_flip_char(tty, 0,
1076                                                         TTY_NORMAL);
1077                                         info->icount.rx++;
1078                                 }
1079                         } else {
1080                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1081                                 info->icount.rx++;
1082                         }
1083                 } else {
1084                         /* there was a software buffer overrun and nothing
1085                          * could be done about it!!! */
1086                         info->icount.buf_overrun++;
1087                         info->idle_stats.overruns++;
1088                 }
1089         } else {        /* normal character reception */
1090                 /* load # chars available from the chip */
1091                 char_count = readb(base_addr + (CyRDCR << index));
1092
1093 #ifdef CY_ENABLE_MONITORING
1094                 ++info->mon.int_count;
1095                 info->mon.char_count += char_count;
1096                 if (char_count > info->mon.char_max)
1097                         info->mon.char_max = char_count;
1098                 info->mon.char_last = char_count;
1099 #endif
1100                 len = tty_buffer_request_room(tty, char_count);
1101                 while (len--) {
1102                         data = readb(base_addr + (CyRDSR << index));
1103                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1104                         info->idle_stats.recv_bytes++;
1105                         info->icount.rx++;
1106 #ifdef CY_16Y_HACK
1107                         udelay(10L);
1108 #endif
1109                 }
1110                 info->idle_stats.recv_idle = jiffies;
1111         }
1112         tty_schedule_flip(tty);
1113 end:
1114         /* end of service */
1115         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1116         cy_writeb(base_addr + (CyCAR << index), save_car);
1117 }
1118
1119 static void cyy_chip_tx(struct cyclades_card *cinfo, int chip,
1120                 void __iomem *base_addr)
1121 {
1122         struct cyclades_port *info;
1123         int char_count;
1124         int outch;
1125         int save_xir, channel, save_car, index = cinfo->bus_index;
1126
1127         /* Since we only get here when the transmit buffer
1128            is empty, we know we can always stuff a dozen
1129            characters. */
1130 #ifdef CY_DEBUG_INTERRUPTS
1131         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1132 #endif
1133
1134         /* determine the channel & change to that context */
1135         save_xir = (u_char) readb(base_addr + (CyTIR << index));
1136         channel = (u_short) (save_xir & CyIRChannel);
1137         save_car = readb(base_addr + (CyCAR << index));
1138         cy_writeb(base_addr + (CyCAR << index), save_xir);
1139
1140         /* validate the port# (as configured and open) */
1141         if (channel + chip * 4 >= cinfo->nports) {
1142                 cy_writeb(base_addr + (CySRER << index),
1143                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1144                 goto end;
1145         }
1146         info = &cinfo->ports[channel + chip * 4];
1147         if (info->tty == NULL) {
1148                 cy_writeb(base_addr + (CySRER << index),
1149                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1150                 goto end;
1151         }
1152
1153         /* load the on-chip space for outbound data */
1154         char_count = info->xmit_fifo_size;
1155
1156         if (info->x_char) {     /* send special char */
1157                 outch = info->x_char;
1158                 cy_writeb(base_addr + (CyTDR << index), outch);
1159                 char_count--;
1160                 info->icount.tx++;
1161                 info->x_char = 0;
1162         }
1163
1164         if (info->breakon || info->breakoff) {
1165                 if (info->breakon) {
1166                         cy_writeb(base_addr + (CyTDR << index), 0);
1167                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1168                         info->breakon = 0;
1169                         char_count -= 2;
1170                 }
1171                 if (info->breakoff) {
1172                         cy_writeb(base_addr + (CyTDR << index), 0);
1173                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1174                         info->breakoff = 0;
1175                         char_count -= 2;
1176                 }
1177         }
1178
1179         while (char_count-- > 0) {
1180                 if (!info->xmit_cnt) {
1181                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1182                                 cy_writeb(base_addr + (CySRER << index),
1183                                         readb(base_addr + (CySRER << index)) &
1184                                                 ~CyTxMpty);
1185                         } else {
1186                                 cy_writeb(base_addr + (CySRER << index),
1187                                         (readb(base_addr + (CySRER << index)) &
1188                                                 ~CyTxRdy) | CyTxMpty);
1189                         }
1190                         goto done;
1191                 }
1192                 if (info->xmit_buf == NULL) {
1193                         cy_writeb(base_addr + (CySRER << index),
1194                                 readb(base_addr + (CySRER << index)) &
1195                                         ~CyTxRdy);
1196                         goto done;
1197                 }
1198                 if (info->tty->stopped || info->tty->hw_stopped) {
1199                         cy_writeb(base_addr + (CySRER << index),
1200                                 readb(base_addr + (CySRER << index)) &
1201                                         ~CyTxRdy);
1202                         goto done;
1203                 }
1204                 /* Because the Embedded Transmit Commands have been enabled,
1205                  * we must check to see if the escape character, NULL, is being
1206                  * sent. If it is, we must ensure that there is room for it to
1207                  * be doubled in the output stream.  Therefore we no longer
1208                  * advance the pointer when the character is fetched, but
1209                  * rather wait until after the check for a NULL output
1210                  * character. This is necessary because there may not be room
1211                  * for the two chars needed to send a NULL.)
1212                  */
1213                 outch = info->xmit_buf[info->xmit_tail];
1214                 if (outch) {
1215                         info->xmit_cnt--;
1216                         info->xmit_tail = (info->xmit_tail + 1) &
1217                                         (SERIAL_XMIT_SIZE - 1);
1218                         cy_writeb(base_addr + (CyTDR << index), outch);
1219                         info->icount.tx++;
1220                 } else {
1221                         if (char_count > 1) {
1222                                 info->xmit_cnt--;
1223                                 info->xmit_tail = (info->xmit_tail + 1) &
1224                                         (SERIAL_XMIT_SIZE - 1);
1225                                 cy_writeb(base_addr + (CyTDR << index), outch);
1226                                 cy_writeb(base_addr + (CyTDR << index), 0);
1227                                 info->icount.tx++;
1228                                 char_count--;
1229                         }
1230                 }
1231         }
1232
1233 done:
1234         tty_wakeup(info->tty);
1235 end:
1236         /* end of service */
1237         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1238         cy_writeb(base_addr + (CyCAR << index), save_car);
1239 }
1240
1241 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1242                 void __iomem *base_addr)
1243 {
1244         struct cyclades_port *info;
1245         int mdm_change, mdm_status;
1246         int save_xir, channel, save_car, index = cinfo->bus_index;
1247
1248         /* determine the channel & change to that context */
1249         save_xir = (u_char) readb(base_addr + (CyMIR << index));
1250         channel = (u_short) (save_xir & CyIRChannel);
1251         info = &cinfo->ports[channel + chip * 4];
1252         save_car = readb(base_addr + (CyCAR << index));
1253         cy_writeb(base_addr + (CyCAR << index), save_xir);
1254
1255         mdm_change = readb(base_addr + (CyMISR << index));
1256         mdm_status = readb(base_addr + (CyMSVR1 << index));
1257
1258         if (!info->tty)
1259                 goto end;
1260
1261         if (mdm_change & CyANY_DELTA) {
1262                 /* For statistics only */
1263                 if (mdm_change & CyDCD)
1264                         info->icount.dcd++;
1265                 if (mdm_change & CyCTS)
1266                         info->icount.cts++;
1267                 if (mdm_change & CyDSR)
1268                         info->icount.dsr++;
1269                 if (mdm_change & CyRI)
1270                         info->icount.rng++;
1271
1272                 wake_up_interruptible(&info->delta_msr_wait);
1273         }
1274
1275         if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1276                 if (!(mdm_status & CyDCD)) {
1277                         tty_hangup(info->tty);
1278                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1279                 }
1280                 wake_up_interruptible(&info->open_wait);
1281         }
1282         if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1283                 if (info->tty->hw_stopped) {
1284                         if (mdm_status & CyCTS) {
1285                                 /* cy_start isn't used
1286                                    because... !!! */
1287                                 info->tty->hw_stopped = 0;
1288                                 cy_writeb(base_addr + (CySRER << index),
1289                                         readb(base_addr + (CySRER << index)) |
1290                                                 CyTxRdy);
1291                                 tty_wakeup(info->tty);
1292                         }
1293                 } else {
1294                         if (!(mdm_status & CyCTS)) {
1295                                 /* cy_stop isn't used
1296                                    because ... !!! */
1297                                 info->tty->hw_stopped = 1;
1298                                 cy_writeb(base_addr + (CySRER << index),
1299                                         readb(base_addr + (CySRER << index)) &
1300                                                 ~CyTxRdy);
1301                         }
1302                 }
1303         }
1304 /*      if (mdm_change & CyDSR) {
1305         }
1306         if (mdm_change & CyRI) {
1307         }*/
1308 end:
1309         /* end of service */
1310         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1311         cy_writeb(base_addr + (CyCAR << index), save_car);
1312 }
1313
1314 /* The real interrupt service routine is called
1315    whenever the card wants its hand held--chars
1316    received, out buffer empty, modem change, etc.
1317  */
1318 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1319 {
1320         int status;
1321         struct cyclades_card *cinfo = dev_id;
1322         void __iomem *base_addr, *card_base_addr;
1323         int chip;
1324         int index;
1325         int too_many;
1326         int had_work;
1327
1328         if (unlikely(cinfo == NULL)) {
1329 #ifdef CY_DEBUG_INTERRUPTS
1330                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1331 #endif
1332                 return IRQ_NONE;        /* spurious interrupt */
1333         }
1334
1335         card_base_addr = cinfo->base_addr;
1336         index = cinfo->bus_index;
1337
1338         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339         if (unlikely(card_base_addr == NULL))
1340                 return IRQ_HANDLED;
1341
1342         /* This loop checks all chips in the card.  Make a note whenever
1343            _any_ chip had some work to do, as this is considered an
1344            indication that there will be more to do.  Only when no chip
1345            has any work does this outermost loop exit.
1346          */
1347         do {
1348                 had_work = 0;
1349                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350                         base_addr = cinfo->base_addr +
1351                                         (cy_chip_offset[chip] << index);
1352                         too_many = 0;
1353                         while ((status = readb(base_addr +
1354                                                 (CySVRR << index))) != 0x00) {
1355                                 had_work++;
1356                         /* The purpose of the following test is to ensure that
1357                            no chip can monopolize the driver.  This forces the
1358                            chips to be checked in a round-robin fashion (after
1359                            draining each of a bunch (1000) of characters).
1360                          */
1361                                 if (1000 < too_many++)
1362                                         break;
1363                                 spin_lock(&cinfo->card_lock);
1364                                 if (status & CySRReceive) /* rx intr */
1365                                         cyy_chip_rx(cinfo, chip, base_addr);
1366                                 if (status & CySRTransmit) /* tx intr */
1367                                         cyy_chip_tx(cinfo, chip, base_addr);
1368                                 if (status & CySRModem) /* modem intr */
1369                                         cyy_chip_modem(cinfo, chip, base_addr);
1370                                 spin_unlock(&cinfo->card_lock);
1371                         }
1372                 }
1373         } while (had_work);
1374
1375         /* clear interrupts */
1376         spin_lock(&cinfo->card_lock);
1377         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378         /* Cy_ClrIntr is 0x1800 */
1379         spin_unlock(&cinfo->card_lock);
1380         return IRQ_HANDLED;
1381 }                               /* cyy_interrupt */
1382
1383 /***********************************************************/
1384 /********* End of block of Cyclom-Y specific code **********/
1385 /******** Start of block of Cyclades-Z specific code *********/
1386 /***********************************************************/
1387
1388 static int
1389 cyz_fetch_msg(struct cyclades_card *cinfo,
1390                 __u32 * channel, __u8 * cmd, __u32 * param)
1391 {
1392         struct FIRM_ID __iomem *firm_id;
1393         struct ZFW_CTRL __iomem *zfw_ctrl;
1394         struct BOARD_CTRL __iomem *board_ctrl;
1395         unsigned long loc_doorbell;
1396
1397         firm_id = cinfo->base_addr + ID_ADDRESS;
1398         if (!ISZLOADED(*cinfo)) {
1399                 return -1;
1400         }
1401         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1402         board_ctrl = &zfw_ctrl->board_ctrl;
1403
1404         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1405                                   (cinfo->ctl_addr))->loc_doorbell);
1406         if (loc_doorbell) {
1407                 *cmd = (char)(0xff & loc_doorbell);
1408                 *channel = readl(&board_ctrl->fwcmd_channel);
1409                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1410                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1411                           loc_doorbell, 0xffffffff);
1412                 return 1;
1413         }
1414         return 0;
1415 }                               /* cyz_fetch_msg */
1416
1417 static int
1418 cyz_issue_cmd(struct cyclades_card *cinfo,
1419                 __u32 channel, __u8 cmd, __u32 param)
1420 {
1421         struct FIRM_ID __iomem *firm_id;
1422         struct ZFW_CTRL __iomem *zfw_ctrl;
1423         struct BOARD_CTRL __iomem *board_ctrl;
1424         __u32 __iomem *pci_doorbell;
1425         int index;
1426
1427         firm_id = cinfo->base_addr + ID_ADDRESS;
1428         if (!ISZLOADED(*cinfo)) {
1429                 return -1;
1430         }
1431         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1432         board_ctrl = &zfw_ctrl->board_ctrl;
1433
1434         index = 0;
1435         pci_doorbell =
1436             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1437         while ((readl(pci_doorbell) & 0xff) != 0) {
1438                 if (index++ == 1000) {
1439                         return (int)(readl(pci_doorbell) & 0xff);
1440                 }
1441                 udelay(50L);
1442         }
1443         cy_writel(&board_ctrl->hcmd_channel, channel);
1444         cy_writel(&board_ctrl->hcmd_param, param);
1445         cy_writel(pci_doorbell, (long)cmd);
1446
1447         return 0;
1448 }                               /* cyz_issue_cmd */
1449
1450 static void
1451 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1452                 struct BUF_CTRL __iomem *buf_ctrl)
1453 {
1454         struct cyclades_card *cinfo = info->card;
1455         struct tty_struct *tty = info->tty;
1456         int char_count;
1457         int len;
1458 #ifdef BLOCKMOVE
1459         unsigned char *buf;
1460 #else
1461         char data;
1462 #endif
1463         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1464
1465         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1466         rx_put = readl(&buf_ctrl->rx_put);
1467         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1468         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1469         if (rx_put >= rx_get)
1470                 char_count = rx_put - rx_get;
1471         else
1472                 char_count = rx_put - rx_get + rx_bufsize;
1473
1474         if (char_count) {
1475 #ifdef CY_ENABLE_MONITORING
1476                 info->mon.int_count++;
1477                 info->mon.char_count += char_count;
1478                 if (char_count > info->mon.char_max)
1479                         info->mon.char_max = char_count;
1480                 info->mon.char_last = char_count;
1481 #endif
1482                 if (tty == NULL) {
1483                         /* flush received characters */
1484                         new_rx_get = (new_rx_get + char_count) &
1485                                         (rx_bufsize - 1);
1486                         info->rflush_count++;
1487                 } else {
1488 #ifdef BLOCKMOVE
1489                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1490                    for performance, but because of buffer boundaries, there
1491                    may be several steps to the operation */
1492                         while (1) {
1493                                 len = tty_prepare_flip_string(tty, &buf,
1494                                                 char_count);
1495                                 if (!len)
1496                                         break;
1497
1498                                 len = min_t(unsigned int, min(len, char_count),
1499                                                 rx_bufsize - new_rx_get);
1500
1501                                 memcpy_fromio(buf, cinfo->base_addr +
1502                                                 rx_bufaddr + new_rx_get, len);
1503
1504                                 new_rx_get = (new_rx_get + len) &
1505                                                 (rx_bufsize - 1);
1506                                 char_count -= len;
1507                                 info->icount.rx += len;
1508                                 info->idle_stats.recv_bytes += len;
1509                         }
1510 #else
1511                         len = tty_buffer_request_room(tty, char_count);
1512                         while (len--) {
1513                                 data = readb(cinfo->base_addr + rx_bufaddr +
1514                                                 new_rx_get);
1515                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1516                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1517                                 info->idle_stats.recv_bytes++;
1518                                 info->icount.rx++;
1519                         }
1520 #endif
1521 #ifdef CONFIG_CYZ_INTR
1522                 /* Recalculate the number of chars in the RX buffer and issue
1523                    a cmd in case it's higher than the RX high water mark */
1524                         rx_put = readl(&buf_ctrl->rx_put);
1525                         if (rx_put >= rx_get)
1526                                 char_count = rx_put - rx_get;
1527                         else
1528                                 char_count = rx_put - rx_get + rx_bufsize;
1529                         if (char_count >= (int)readl(&buf_ctrl->rx_threshold) &&
1530                                         !timer_pending(&cyz_rx_full_timer[
1531                                                         info->line]))
1532                                 mod_timer(&cyz_rx_full_timer[info->line],
1533                                                 jiffies + 1);
1534 #endif
1535                         info->idle_stats.recv_idle = jiffies;
1536                         tty_schedule_flip(tty);
1537                 }
1538                 /* Update rx_get */
1539                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1540         }
1541 }
1542
1543 static void
1544 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1545                 struct BUF_CTRL __iomem *buf_ctrl)
1546 {
1547         struct cyclades_card *cinfo = info->card;
1548         struct tty_struct *tty = info->tty;
1549         char data;
1550         int char_count;
1551 #ifdef BLOCKMOVE
1552         int small_count;
1553 #endif
1554         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1555
1556         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1557                 return;
1558
1559         tx_get = readl(&buf_ctrl->tx_get);
1560         tx_put = readl(&buf_ctrl->tx_put);
1561         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1562         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1563         if (tx_put >= tx_get)
1564                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1565         else
1566                 char_count = tx_get - tx_put - 1;
1567
1568         if (char_count) {
1569
1570                 if (tty == NULL)
1571                         goto ztxdone;
1572
1573                 if (info->x_char) {     /* send special char */
1574                         data = info->x_char;
1575
1576                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1577                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1578                         info->x_char = 0;
1579                         char_count--;
1580                         info->icount.tx++;
1581                 }
1582 #ifdef BLOCKMOVE
1583                 while (0 < (small_count = min_t(unsigned int,
1584                                 tx_bufsize - tx_put, min_t(unsigned int,
1585                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1586                                         min_t(unsigned int, info->xmit_cnt,
1587                                                 char_count))))) {
1588
1589                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1590                                         tx_put),
1591                                         &info->xmit_buf[info->xmit_tail],
1592                                         small_count);
1593
1594                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1595                         char_count -= small_count;
1596                         info->icount.tx += small_count;
1597                         info->xmit_cnt -= small_count;
1598                         info->xmit_tail = (info->xmit_tail + small_count) &
1599                                         (SERIAL_XMIT_SIZE - 1);
1600                 }
1601 #else
1602                 while (info->xmit_cnt && char_count) {
1603                         data = info->xmit_buf[info->xmit_tail];
1604                         info->xmit_cnt--;
1605                         info->xmit_tail = (info->xmit_tail + 1) &
1606                                         (SERIAL_XMIT_SIZE - 1);
1607
1608                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1609                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1610                         char_count--;
1611                         info->icount.tx++;
1612                 }
1613 #endif
1614 ztxdone:
1615                 tty_wakeup(tty);
1616                 /* Update tx_put */
1617                 cy_writel(&buf_ctrl->tx_put, tx_put);
1618         }
1619 }
1620
1621 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1622 {
1623         struct tty_struct *tty;
1624         struct cyclades_port *info;
1625         static struct FIRM_ID __iomem *firm_id;
1626         static struct ZFW_CTRL __iomem *zfw_ctrl;
1627         static struct BOARD_CTRL __iomem *board_ctrl;
1628         static struct CH_CTRL __iomem *ch_ctrl;
1629         static struct BUF_CTRL __iomem *buf_ctrl;
1630         __u32 channel;
1631         __u8 cmd;
1632         __u32 param;
1633         __u32 hw_ver, fw_ver;
1634         int special_count;
1635         int delta_count;
1636
1637         firm_id = cinfo->base_addr + ID_ADDRESS;
1638         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1639         board_ctrl = &zfw_ctrl->board_ctrl;
1640         fw_ver = readl(&board_ctrl->fw_version);
1641         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1642                         mail_box_0);
1643
1644         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1645                 special_count = 0;
1646                 delta_count = 0;
1647                 info = &cinfo->ports[channel];
1648                 if ((tty = info->tty) == NULL)
1649                         continue;
1650
1651                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1652                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1653
1654                 switch (cmd) {
1655                 case C_CM_PR_ERROR:
1656                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1657                         info->icount.rx++;
1658                         special_count++;
1659                         break;
1660                 case C_CM_FR_ERROR:
1661                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1662                         info->icount.rx++;
1663                         special_count++;
1664                         break;
1665                 case C_CM_RXBRK:
1666                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1667                         info->icount.rx++;
1668                         special_count++;
1669                         break;
1670                 case C_CM_MDCD:
1671                         info->icount.dcd++;
1672                         delta_count++;
1673                         if (info->flags & ASYNC_CHECK_CD) {
1674                                 if ((fw_ver > 241 ? ((u_long) param) :
1675                                                 readl(&ch_ctrl->rs_status)) &
1676                                                 C_RS_DCD) {
1677                                         wake_up_interruptible(&info->open_wait);
1678                                 } else {
1679                                         tty_hangup(info->tty);
1680                                         wake_up_interruptible(&info->open_wait);
1681                                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1682                                 }
1683                         }
1684                         break;
1685                 case C_CM_MCTS:
1686                         info->icount.cts++;
1687                         delta_count++;
1688                         break;
1689                 case C_CM_MRI:
1690                         info->icount.rng++;
1691                         delta_count++;
1692                         break;
1693                 case C_CM_MDSR:
1694                         info->icount.dsr++;
1695                         delta_count++;
1696                         break;
1697 #ifdef Z_WAKE
1698                 case C_CM_IOCTLW:
1699                         complete(&info->shutdown_wait);
1700                         break;
1701 #endif
1702 #ifdef CONFIG_CYZ_INTR
1703                 case C_CM_RXHIWM:
1704                 case C_CM_RXNNDT:
1705                 case C_CM_INTBACK2:
1706                         /* Reception Interrupt */
1707 #ifdef CY_DEBUG_INTERRUPTS
1708                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1709                                         "port %ld\n", info->card, channel);
1710 #endif
1711                         cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1712                         break;
1713                 case C_CM_TXBEMPTY:
1714                 case C_CM_TXLOWWM:
1715                 case C_CM_INTBACK:
1716                         /* Transmission Interrupt */
1717 #ifdef CY_DEBUG_INTERRUPTS
1718                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1719                                         "port %ld\n", info->card, channel);
1720 #endif
1721                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1722                         break;
1723 #endif                          /* CONFIG_CYZ_INTR */
1724                 case C_CM_FATAL:
1725                         /* should do something with this !!! */
1726                         break;
1727                 default:
1728                         break;
1729                 }
1730                 if (delta_count)
1731                         wake_up_interruptible(&info->delta_msr_wait);
1732                 if (special_count)
1733                         tty_schedule_flip(tty);
1734         }
1735 }
1736
1737 #ifdef CONFIG_CYZ_INTR
1738 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1739 {
1740         struct cyclades_card *cinfo = dev_id;
1741
1742         if (unlikely(cinfo == NULL)) {
1743 #ifdef CY_DEBUG_INTERRUPTS
1744                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1745 #endif
1746                 return IRQ_NONE;        /* spurious interrupt */
1747         }
1748
1749         if (unlikely(!ISZLOADED(*cinfo))) {
1750 #ifdef CY_DEBUG_INTERRUPTS
1751                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1752                                 "(IRQ%d).\n", irq);
1753 #endif
1754                 return IRQ_NONE;
1755         }
1756
1757         /* Handle the interrupts */
1758         cyz_handle_cmd(cinfo);
1759
1760         return IRQ_HANDLED;
1761 }                               /* cyz_interrupt */
1762
1763 static void cyz_rx_restart(unsigned long arg)
1764 {
1765         struct cyclades_port *info = (struct cyclades_port *)arg;
1766         struct cyclades_card *card = info->card;
1767         int retval;
1768         __u32 channel = info->line - card->first_line;
1769         unsigned long flags;
1770
1771         spin_lock_irqsave(&card->card_lock, flags);
1772         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1773         if (retval != 0) {
1774                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1775                         info->line, retval);
1776         }
1777         spin_unlock_irqrestore(&card->card_lock, flags);
1778 }
1779
1780 #else                           /* CONFIG_CYZ_INTR */
1781
1782 static void cyz_poll(unsigned long arg)
1783 {
1784         struct cyclades_card *cinfo;
1785         struct cyclades_port *info;
1786         struct tty_struct *tty;
1787         struct FIRM_ID __iomem *firm_id;
1788         struct ZFW_CTRL __iomem *zfw_ctrl;
1789         struct BOARD_CTRL __iomem *board_ctrl;
1790         struct CH_CTRL __iomem *ch_ctrl;
1791         struct BUF_CTRL __iomem *buf_ctrl;
1792         unsigned long expires = jiffies + HZ;
1793         int card, port;
1794
1795         for (card = 0; card < NR_CARDS; card++) {
1796                 cinfo = &cy_card[card];
1797
1798                 if (!IS_CYC_Z(*cinfo))
1799                         continue;
1800                 if (!ISZLOADED(*cinfo))
1801                         continue;
1802
1803                 firm_id = cinfo->base_addr + ID_ADDRESS;
1804                 zfw_ctrl = cinfo->base_addr +
1805                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1806                 board_ctrl = &(zfw_ctrl->board_ctrl);
1807
1808         /* Skip first polling cycle to avoid racing conditions with the FW */
1809                 if (!cinfo->intr_enabled) {
1810                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1811                         cinfo->intr_enabled = 1;
1812                         continue;
1813                 }
1814
1815                 cyz_handle_cmd(cinfo);
1816
1817                 for (port = 0; port < cinfo->nports; port++) {
1818                         info = &cinfo->ports[port];
1819                         tty = info->tty;
1820                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1821                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1822
1823                         if (!info->throttle)
1824                                 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1825                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1826                 }
1827                 /* poll every 'cyz_polling_cycle' period */
1828                 expires = jiffies + cyz_polling_cycle;
1829         }
1830         mod_timer(&cyz_timerlist, expires);
1831 }                               /* cyz_poll */
1832
1833 #endif                          /* CONFIG_CYZ_INTR */
1834
1835 /********** End of block of Cyclades-Z specific code *********/
1836 /***********************************************************/
1837
1838 /* This is called whenever a port becomes active;
1839    interrupts are enabled and DTR & RTS are turned on.
1840  */
1841 static int startup(struct cyclades_port *info)
1842 {
1843         struct cyclades_card *card;
1844         unsigned long flags;
1845         int retval = 0;
1846         void __iomem *base_addr;
1847         int chip, channel, index;
1848         unsigned long page;
1849
1850         card = info->card;
1851         channel = info->line - card->first_line;
1852
1853         page = get_zeroed_page(GFP_KERNEL);
1854         if (!page)
1855                 return -ENOMEM;
1856
1857         spin_lock_irqsave(&card->card_lock, flags);
1858
1859         if (info->flags & ASYNC_INITIALIZED) {
1860                 free_page(page);
1861                 goto errout;
1862         }
1863
1864         if (!info->type) {
1865                 if (info->tty) {
1866                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1867                 }
1868                 free_page(page);
1869                 goto errout;
1870         }
1871
1872         if (info->xmit_buf)
1873                 free_page(page);
1874         else
1875                 info->xmit_buf = (unsigned char *)page;
1876
1877         spin_unlock_irqrestore(&card->card_lock, flags);
1878
1879         set_line_char(info);
1880
1881         if (!IS_CYC_Z(*card)) {
1882                 chip = channel >> 2;
1883                 channel &= 0x03;
1884                 index = card->bus_index;
1885                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1886
1887 #ifdef CY_DEBUG_OPEN
1888                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1889                                 "base_addr %p\n",
1890                                 card, chip, channel, base_addr);
1891 #endif
1892                 spin_lock_irqsave(&card->card_lock, flags);
1893
1894                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1895
1896                 cy_writeb(base_addr + (CyRTPR << index),
1897                         (info->default_timeout ? info->default_timeout : 0x02));
1898                 /* 10ms rx timeout */
1899
1900                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1901                                 index);
1902
1903                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1904                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1905                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1906
1907 #ifdef CY_DEBUG_DTR
1908                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1909                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1910                         readb(base_addr + (CyMSVR1 << index)),
1911                         readb(base_addr + (CyMSVR2 << index)));
1912 #endif
1913
1914                 cy_writeb(base_addr + (CySRER << index),
1915                         readb(base_addr + (CySRER << index)) | CyRxData);
1916                 info->flags |= ASYNC_INITIALIZED;
1917
1918                 if (info->tty) {
1919                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
1920                 }
1921                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1922                 info->breakon = info->breakoff = 0;
1923                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1924                 info->idle_stats.in_use =
1925                 info->idle_stats.recv_idle =
1926                 info->idle_stats.xmit_idle = jiffies;
1927
1928                 spin_unlock_irqrestore(&card->card_lock, flags);
1929
1930         } else {
1931                 struct FIRM_ID __iomem *firm_id;
1932                 struct ZFW_CTRL __iomem *zfw_ctrl;
1933                 struct BOARD_CTRL __iomem *board_ctrl;
1934                 struct CH_CTRL __iomem *ch_ctrl;
1935
1936                 base_addr = card->base_addr;
1937
1938                 firm_id = base_addr + ID_ADDRESS;
1939                 if (!ISZLOADED(*card)) {
1940                         return -ENODEV;
1941                 }
1942
1943                 zfw_ctrl = card->base_addr +
1944                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1945                 board_ctrl = &zfw_ctrl->board_ctrl;
1946                 ch_ctrl = zfw_ctrl->ch_ctrl;
1947
1948 #ifdef CY_DEBUG_OPEN
1949                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1950                         "base_addr %p\n", card, channel, base_addr);
1951 #endif
1952                 spin_lock_irqsave(&card->card_lock, flags);
1953
1954                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1955 #ifdef Z_WAKE
1956 #ifdef CONFIG_CYZ_INTR
1957                 cy_writel(&ch_ctrl[channel].intr_enable,
1958                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1959                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1960 #else
1961                 cy_writel(&ch_ctrl[channel].intr_enable,
1962                           C_IN_IOCTLW | C_IN_MDCD);
1963 #endif                          /* CONFIG_CYZ_INTR */
1964 #else
1965 #ifdef CONFIG_CYZ_INTR
1966                 cy_writel(&ch_ctrl[channel].intr_enable,
1967                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1968                           C_IN_RXNNDT | C_IN_MDCD);
1969 #else
1970                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1971 #endif                          /* CONFIG_CYZ_INTR */
1972 #endif                          /* Z_WAKE */
1973
1974                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1975                 if (retval != 0) {
1976                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1977                                 "%x\n", info->line, retval);
1978                 }
1979
1980                 /* Flush RX buffers before raising DTR and RTS */
1981                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1982                 if (retval != 0) {
1983                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1984                                 "%x\n", info->line, retval);
1985                 }
1986
1987                 /* set timeout !!! */
1988                 /* set RTS and DTR !!! */
1989                 cy_writel(&ch_ctrl[channel].rs_control,
1990                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1991                         C_RS_DTR);
1992                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1993                 if (retval != 0) {
1994                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1995                                 "%x\n", info->line, retval);
1996                 }
1997 #ifdef CY_DEBUG_DTR
1998                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1999 #endif
2000
2001                 /* enable send, recv, modem !!! */
2002
2003                 info->flags |= ASYNC_INITIALIZED;
2004                 if (info->tty) {
2005                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2006                 }
2007                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2008                 info->breakon = info->breakoff = 0;
2009                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2010                 info->idle_stats.in_use =
2011                 info->idle_stats.recv_idle =
2012                 info->idle_stats.xmit_idle = jiffies;
2013
2014                 spin_unlock_irqrestore(&card->card_lock, flags);
2015         }
2016
2017 #ifdef CY_DEBUG_OPEN
2018         printk(KERN_DEBUG "cyc startup done\n");
2019 #endif
2020         return 0;
2021
2022 errout:
2023         spin_unlock_irqrestore(&card->card_lock, flags);
2024         return retval;
2025 }                               /* startup */
2026
2027 static void start_xmit(struct cyclades_port *info)
2028 {
2029         struct cyclades_card *card;
2030         unsigned long flags;
2031         void __iomem *base_addr;
2032         int chip, channel, index;
2033
2034         card = info->card;
2035         channel = info->line - card->first_line;
2036         if (!IS_CYC_Z(*card)) {
2037                 chip = channel >> 2;
2038                 channel &= 0x03;
2039                 index = card->bus_index;
2040                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2041
2042                 spin_lock_irqsave(&card->card_lock, flags);
2043                 cy_writeb(base_addr + (CyCAR << index), channel);
2044                 cy_writeb(base_addr + (CySRER << index),
2045                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2046                 spin_unlock_irqrestore(&card->card_lock, flags);
2047         } else {
2048 #ifdef CONFIG_CYZ_INTR
2049                 int retval;
2050
2051                 spin_lock_irqsave(&card->card_lock, flags);
2052                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2053                 if (retval != 0) {
2054                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2055                                 "%x\n", info->line, retval);
2056                 }
2057                 spin_unlock_irqrestore(&card->card_lock, flags);
2058 #else                           /* CONFIG_CYZ_INTR */
2059                 /* Don't have to do anything at this time */
2060 #endif                          /* CONFIG_CYZ_INTR */
2061         }
2062 }                               /* start_xmit */
2063
2064 /*
2065  * This routine shuts down a serial port; interrupts are disabled,
2066  * and DTR is dropped if the hangup on close termio flag is on.
2067  */
2068 static void shutdown(struct cyclades_port *info)
2069 {
2070         struct cyclades_card *card;
2071         unsigned long flags;
2072         void __iomem *base_addr;
2073         int chip, channel, index;
2074
2075         if (!(info->flags & ASYNC_INITIALIZED)) {
2076                 return;
2077         }
2078
2079         card = info->card;
2080         channel = info->line - card->first_line;
2081         if (!IS_CYC_Z(*card)) {
2082                 chip = channel >> 2;
2083                 channel &= 0x03;
2084                 index = card->bus_index;
2085                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2086
2087 #ifdef CY_DEBUG_OPEN
2088                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2089                                 "channel %d, base_addr %p\n",
2090                                 card, chip, channel, base_addr);
2091 #endif
2092
2093                 spin_lock_irqsave(&card->card_lock, flags);
2094
2095                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2096                 wake_up_interruptible(&info->delta_msr_wait);
2097
2098                 if (info->xmit_buf) {
2099                         unsigned char *temp;
2100                         temp = info->xmit_buf;
2101                         info->xmit_buf = NULL;
2102                         free_page((unsigned long)temp);
2103                 }
2104                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2105                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2106                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2107                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2108 #ifdef CY_DEBUG_DTR
2109                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2110                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2111                                 readb(base_addr + (CyMSVR1 << index)),
2112                                 readb(base_addr + (CyMSVR2 << index)));
2113 #endif
2114                 }
2115                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2116                 /* it may be appropriate to clear _XMIT at
2117                    some later date (after testing)!!! */
2118
2119                 if (info->tty) {
2120                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2121                 }
2122                 info->flags &= ~ASYNC_INITIALIZED;
2123                 spin_unlock_irqrestore(&card->card_lock, flags);
2124         } else {
2125                 struct FIRM_ID __iomem *firm_id;
2126                 struct ZFW_CTRL __iomem *zfw_ctrl;
2127                 struct BOARD_CTRL __iomem *board_ctrl;
2128                 struct CH_CTRL __iomem *ch_ctrl;
2129                 int retval;
2130
2131                 base_addr = card->base_addr;
2132 #ifdef CY_DEBUG_OPEN
2133                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2134                         "base_addr %p\n", card, channel, base_addr);
2135 #endif
2136
2137                 firm_id = base_addr + ID_ADDRESS;
2138                 if (!ISZLOADED(*card)) {
2139                         return;
2140                 }
2141
2142                 zfw_ctrl = card->base_addr +
2143                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2144                 board_ctrl = &zfw_ctrl->board_ctrl;
2145                 ch_ctrl = zfw_ctrl->ch_ctrl;
2146
2147                 spin_lock_irqsave(&card->card_lock, flags);
2148
2149                 if (info->xmit_buf) {
2150                         unsigned char *temp;
2151                         temp = info->xmit_buf;
2152                         info->xmit_buf = NULL;
2153                         free_page((unsigned long)temp);
2154                 }
2155
2156                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2157                         cy_writel(&ch_ctrl[channel].rs_control,
2158                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2159                                         ~(C_RS_RTS | C_RS_DTR)));
2160                         retval = cyz_issue_cmd(info->card, channel,
2161                                         C_CM_IOCTLM, 0L);
2162                         if (retval != 0) {
2163                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2164                                         "was %x\n", info->line, retval);
2165                         }
2166 #ifdef CY_DEBUG_DTR
2167                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2168 #endif
2169                 }
2170
2171                 if (info->tty) {
2172                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2173                 }
2174                 info->flags &= ~ASYNC_INITIALIZED;
2175
2176                 spin_unlock_irqrestore(&card->card_lock, flags);
2177         }
2178
2179 #ifdef CY_DEBUG_OPEN
2180         printk(KERN_DEBUG "cyc shutdown done\n");
2181 #endif
2182 }                               /* shutdown */
2183
2184 /*
2185  * ------------------------------------------------------------
2186  * cy_open() and friends
2187  * ------------------------------------------------------------
2188  */
2189
2190 static int
2191 block_til_ready(struct tty_struct *tty, struct file *filp,
2192                 struct cyclades_port *info)
2193 {
2194         DECLARE_WAITQUEUE(wait, current);
2195         struct cyclades_card *cinfo;
2196         unsigned long flags;
2197         int chip, channel, index;
2198         int retval;
2199         void __iomem *base_addr;
2200
2201         cinfo = info->card;
2202         channel = info->line - cinfo->first_line;
2203
2204         /*
2205          * If the device is in the middle of being closed, then block
2206          * until it's done, and then try again.
2207          */
2208         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2209                 wait_event_interruptible(info->close_wait,
2210                                 !(info->flags & ASYNC_CLOSING));
2211                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2212         }
2213
2214         /*
2215          * If non-blocking mode is set, then make the check up front
2216          * and then exit.
2217          */
2218         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2219                 info->flags |= ASYNC_NORMAL_ACTIVE;
2220                 return 0;
2221         }
2222
2223         /*
2224          * Block waiting for the carrier detect and the line to become
2225          * free (i.e., not in use by the callout).  While we are in
2226          * this loop, info->count is dropped by one, so that
2227          * cy_close() knows when to free things.  We restore it upon
2228          * exit, either normal or abnormal.
2229          */
2230         retval = 0;
2231         add_wait_queue(&info->open_wait, &wait);
2232 #ifdef CY_DEBUG_OPEN
2233         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2234                 "count = %d\n", info->line, info->count);
2235 #endif
2236         spin_lock_irqsave(&cinfo->card_lock, flags);
2237         if (!tty_hung_up_p(filp))
2238                 info->count--;
2239         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2240 #ifdef CY_DEBUG_COUNT
2241         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2242                 "%d\n", current->pid, info->count);
2243 #endif
2244         info->blocked_open++;
2245
2246         if (!IS_CYC_Z(*cinfo)) {
2247                 chip = channel >> 2;
2248                 channel &= 0x03;
2249                 index = cinfo->bus_index;
2250                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2251
2252                 while (1) {
2253                         spin_lock_irqsave(&cinfo->card_lock, flags);
2254                         if ((tty->termios->c_cflag & CBAUD)) {
2255                                 cy_writeb(base_addr + (CyCAR << index),
2256                                           (u_char) channel);
2257                                 cy_writeb(base_addr + (CyMSVR1 << index),
2258                                           CyRTS);
2259                                 cy_writeb(base_addr + (CyMSVR2 << index),
2260                                           CyDTR);
2261 #ifdef CY_DEBUG_DTR
2262                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2263                                         "DTR\n");
2264                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2265                                         readb(base_addr + (CyMSVR1 << index)),
2266                                         readb(base_addr + (CyMSVR2 << index)));
2267 #endif
2268                         }
2269                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2270
2271                         set_current_state(TASK_INTERRUPTIBLE);
2272                         if (tty_hung_up_p(filp) ||
2273                                         !(info->flags & ASYNC_INITIALIZED)) {
2274                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2275                                           -EAGAIN : -ERESTARTSYS);
2276                                 break;
2277                         }
2278
2279                         spin_lock_irqsave(&cinfo->card_lock, flags);
2280                         cy_writeb(base_addr + (CyCAR << index),
2281                                   (u_char) channel);
2282                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2283                                         (readb(base_addr +
2284                                                 (CyMSVR1 << index)) & CyDCD))) {
2285                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2286                                 break;
2287                         }
2288                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2289
2290                         if (signal_pending(current)) {
2291                                 retval = -ERESTARTSYS;
2292                                 break;
2293                         }
2294 #ifdef CY_DEBUG_OPEN
2295                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2296                                 "ttyC%d, count = %d\n",
2297                                 info->line, info->count);
2298 #endif
2299                         schedule();
2300                 }
2301         } else {
2302                 struct FIRM_ID __iomem *firm_id;
2303                 struct ZFW_CTRL __iomem *zfw_ctrl;
2304                 struct BOARD_CTRL __iomem *board_ctrl;
2305                 struct CH_CTRL __iomem *ch_ctrl;
2306
2307                 base_addr = cinfo->base_addr;
2308                 firm_id = base_addr + ID_ADDRESS;
2309                 if (!ISZLOADED(*cinfo)) {
2310                         __set_current_state(TASK_RUNNING);
2311                         remove_wait_queue(&info->open_wait, &wait);
2312                         return -EINVAL;
2313                 }
2314
2315                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2316                 board_ctrl = &zfw_ctrl->board_ctrl;
2317                 ch_ctrl = zfw_ctrl->ch_ctrl;
2318
2319                 while (1) {
2320                         if ((tty->termios->c_cflag & CBAUD)) {
2321                                 cy_writel(&ch_ctrl[channel].rs_control,
2322                                         readl(&ch_ctrl[channel].rs_control) |
2323                                         C_RS_RTS | C_RS_DTR);
2324                                 retval = cyz_issue_cmd(cinfo,
2325                                         channel, C_CM_IOCTLM, 0L);
2326                                 if (retval != 0) {
2327                                         printk(KERN_ERR "cyc:block_til_ready "
2328                                                 "retval on ttyC%d was %x\n",
2329                                                 info->line, retval);
2330                                 }
2331 #ifdef CY_DEBUG_DTR
2332                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2333                                         "Z DTR\n");
2334 #endif
2335                         }
2336
2337                         set_current_state(TASK_INTERRUPTIBLE);
2338                         if (tty_hung_up_p(filp) ||
2339                                         !(info->flags & ASYNC_INITIALIZED)) {
2340                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2341                                           -EAGAIN : -ERESTARTSYS);
2342                                 break;
2343                         }
2344                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2345                                         (readl(&ch_ctrl[channel].rs_status) &
2346                                                 C_RS_DCD))) {
2347                                 break;
2348                         }
2349                         if (signal_pending(current)) {
2350                                 retval = -ERESTARTSYS;
2351                                 break;
2352                         }
2353 #ifdef CY_DEBUG_OPEN
2354                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2355                                 "ttyC%d, count = %d\n",
2356                                 info->line, info->count);
2357 #endif
2358                         schedule();
2359                 }
2360         }
2361         __set_current_state(TASK_RUNNING);
2362         remove_wait_queue(&info->open_wait, &wait);
2363         if (!tty_hung_up_p(filp)) {
2364                 info->count++;
2365 #ifdef CY_DEBUG_COUNT
2366                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2367                         "count to %d\n", current->pid, info->count);
2368 #endif
2369         }
2370         info->blocked_open--;
2371 #ifdef CY_DEBUG_OPEN
2372         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2373                 "count = %d\n", info->line, info->count);
2374 #endif
2375         if (retval)
2376                 return retval;
2377         info->flags |= ASYNC_NORMAL_ACTIVE;
2378         return 0;
2379 }                               /* block_til_ready */
2380
2381 /*
2382  * This routine is called whenever a serial port is opened.  It
2383  * performs the serial-specific initialization for the tty structure.
2384  */
2385 static int cy_open(struct tty_struct *tty, struct file *filp)
2386 {
2387         struct cyclades_port *info;
2388         unsigned int i;
2389         int retval, line;
2390
2391         line = tty->index;
2392         if ((line < 0) || (NR_PORTS <= line)) {
2393                 return -ENODEV;
2394         }
2395         for (i = 0; i < NR_CARDS; i++)
2396                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2397                                 line >= cy_card[i].first_line)
2398                         break;
2399         if (i >= NR_CARDS)
2400                 return -ENODEV;
2401         info = &cy_card[i].ports[line - cy_card[i].first_line];
2402         if (info->line < 0) {
2403                 return -ENODEV;
2404         }
2405
2406         /* If the card's firmware hasn't been loaded,
2407            treat it as absent from the system.  This
2408            will make the user pay attention.
2409          */
2410         if (IS_CYC_Z(*info->card)) {
2411                 struct cyclades_card *cinfo = info->card;
2412                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2413
2414                 if (!ISZLOADED(*cinfo)) {
2415                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2416                                          (cinfo->ctl_addr))->mail_box_0)) &&
2417                                         Z_FPGA_CHECK(*cinfo)) &&
2418                                         (ZFIRM_HLT == readl(
2419                                                 &firm_id->signature))) {
2420                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2421                                         "need an external power supply for "
2422                                         "this number of ports.\nFirmware "
2423                                         "halted.\n");
2424                         } else {
2425                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2426                                         "yet loaded\n");
2427                         }
2428                         return -ENODEV;
2429                 }
2430 #ifdef CONFIG_CYZ_INTR
2431                 else {
2432                 /* In case this Z board is operating in interrupt mode, its
2433                    interrupts should be enabled as soon as the first open
2434                    happens to one of its ports. */
2435                         if (!cinfo->intr_enabled) {
2436                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2437                                 struct BOARD_CTRL __iomem *board_ctrl;
2438
2439                                 zfw_ctrl = cinfo->base_addr +
2440                                         (readl(&firm_id->zfwctrl_addr) &
2441                                          0xfffff);
2442
2443                                 board_ctrl = &zfw_ctrl->board_ctrl;
2444
2445                                 /* Enable interrupts on the PLX chip */
2446                                 cy_writew(cinfo->ctl_addr + 0x68,
2447                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2448                                 /* Enable interrupts on the FW */
2449                                 retval = cyz_issue_cmd(cinfo, 0,
2450                                                 C_CM_IRQ_ENBL, 0L);
2451                                 if (retval != 0) {
2452                                         printk(KERN_ERR "cyc:IRQ enable retval "
2453                                                 "was %x\n", retval);
2454                                 }
2455                                 cinfo->nports =
2456                                         (int)readl(&board_ctrl->n_channel);
2457                                 cinfo->intr_enabled = 1;
2458                         }
2459                 }
2460 #endif                          /* CONFIG_CYZ_INTR */
2461                 /* Make sure this Z port really exists in hardware */
2462                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2463                         return -ENODEV;
2464         }
2465 #ifdef CY_DEBUG_OTHER
2466         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2467 #endif
2468         tty->driver_data = info;
2469         info->tty = tty;
2470         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2471                 return -ENODEV;
2472         }
2473 #ifdef CY_DEBUG_OPEN
2474         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2475                         info->count);
2476 #endif
2477         info->count++;
2478 #ifdef CY_DEBUG_COUNT
2479         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2480                 current->pid, info->count);
2481 #endif
2482
2483         /*
2484          * If the port is the middle of closing, bail out now
2485          */
2486         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2487                 wait_event_interruptible(info->close_wait,
2488                                 !(info->flags & ASYNC_CLOSING));
2489                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2490         }
2491
2492         /*
2493          * Start up serial port
2494          */
2495         retval = startup(info);
2496         if (retval) {
2497                 return retval;
2498         }
2499
2500         retval = block_til_ready(tty, filp, info);
2501         if (retval) {
2502 #ifdef CY_DEBUG_OPEN
2503                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2504                         "with %d\n", retval);
2505 #endif
2506                 return retval;
2507         }
2508
2509         info->throttle = 0;
2510
2511 #ifdef CY_DEBUG_OPEN
2512         printk(KERN_DEBUG "cyc:cy_open done\n");
2513 #endif
2514         return 0;
2515 }                               /* cy_open */
2516
2517 /*
2518  * cy_wait_until_sent() --- wait until the transmitter is empty
2519  */
2520 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2521 {
2522         struct cyclades_card *card;
2523         struct cyclades_port *info = tty->driver_data;
2524         void __iomem *base_addr;
2525         int chip, channel, index;
2526         unsigned long orig_jiffies;
2527         int char_time;
2528
2529         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2530                 return;
2531
2532         if (info->xmit_fifo_size == 0)
2533                 return;         /* Just in case.... */
2534
2535         orig_jiffies = jiffies;
2536         /*
2537          * Set the check interval to be 1/5 of the estimated time to
2538          * send a single character, and make it at least 1.  The check
2539          * interval should also be less than the timeout.
2540          *
2541          * Note: we have to use pretty tight timings here to satisfy
2542          * the NIST-PCTS.
2543          */
2544         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2545         char_time = char_time / 5;
2546         if (char_time <= 0)
2547                 char_time = 1;
2548         if (timeout < 0)
2549                 timeout = 0;
2550         if (timeout)
2551                 char_time = min(char_time, timeout);
2552         /*
2553          * If the transmitter hasn't cleared in twice the approximate
2554          * amount of time to send the entire FIFO, it probably won't
2555          * ever clear.  This assumes the UART isn't doing flow
2556          * control, which is currently the case.  Hence, if it ever
2557          * takes longer than info->timeout, this is probably due to a
2558          * UART bug of some kind.  So, we clamp the timeout parameter at
2559          * 2*info->timeout.
2560          */
2561         if (!timeout || timeout > 2 * info->timeout)
2562                 timeout = 2 * info->timeout;
2563 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2564         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2565                 timeout, char_time, jiffies);
2566 #endif
2567         card = info->card;
2568         channel = (info->line) - (card->first_line);
2569         if (!IS_CYC_Z(*card)) {
2570                 chip = channel >> 2;
2571                 channel &= 0x03;
2572                 index = card->bus_index;
2573                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2574                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2575 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2576                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2577 #endif
2578                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2579                                 break;
2580                         if (timeout && time_after(jiffies, orig_jiffies +
2581                                         timeout))
2582                                 break;
2583                 }
2584         }
2585         /* Run one more char cycle */
2586         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2587 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2588         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2589 #endif
2590 }
2591
2592 /*
2593  * This routine is called when a particular tty device is closed.
2594  */
2595 static void cy_close(struct tty_struct *tty, struct file *filp)
2596 {
2597         struct cyclades_port *info = tty->driver_data;
2598         struct cyclades_card *card;
2599         unsigned long flags;
2600
2601 #ifdef CY_DEBUG_OTHER
2602         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2603 #endif
2604
2605         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2606                 return;
2607         }
2608
2609         card = info->card;
2610
2611         spin_lock_irqsave(&card->card_lock, flags);
2612         /* If the TTY is being hung up, nothing to do */
2613         if (tty_hung_up_p(filp)) {
2614                 spin_unlock_irqrestore(&card->card_lock, flags);
2615                 return;
2616         }
2617 #ifdef CY_DEBUG_OPEN
2618         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2619                 info->count);
2620 #endif
2621         if ((tty->count == 1) && (info->count != 1)) {
2622                 /*
2623                  * Uh, oh.  tty->count is 1, which means that the tty
2624                  * structure will be freed.  Info->count should always
2625                  * be one in these conditions.  If it's greater than
2626                  * one, we've got real problems, since it means the
2627                  * serial port won't be shutdown.
2628                  */
2629                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2630                         "tty->count is 1, info->count is %d\n", info->count);
2631                 info->count = 1;
2632         }
2633 #ifdef CY_DEBUG_COUNT
2634         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2635                 current->pid, info->count - 1);
2636 #endif
2637         if (--info->count < 0) {
2638 #ifdef CY_DEBUG_COUNT
2639                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2640 #endif
2641                 info->count = 0;
2642         }
2643         if (info->count) {
2644                 spin_unlock_irqrestore(&card->card_lock, flags);
2645                 return;
2646         }
2647         info->flags |= ASYNC_CLOSING;
2648
2649         /*
2650          * Now we wait for the transmit buffer to clear; and we notify
2651          * the line discipline to only process XON/XOFF characters.
2652          */
2653         tty->closing = 1;
2654         spin_unlock_irqrestore(&card->card_lock, flags);
2655         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2656                 tty_wait_until_sent(tty, info->closing_wait);
2657         }
2658         spin_lock_irqsave(&card->card_lock, flags);
2659
2660         if (!IS_CYC_Z(*card)) {
2661                 int channel = info->line - card->first_line;
2662                 int index = card->bus_index;
2663                 void __iomem *base_addr = card->base_addr +
2664                         (cy_chip_offset[channel >> 2] << index);
2665                 /* Stop accepting input */
2666                 channel &= 0x03;
2667                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2668                 cy_writeb(base_addr + (CySRER << index),
2669                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2670                 if (info->flags & ASYNC_INITIALIZED) {
2671                         /* Waiting for on-board buffers to be empty before closing
2672                            the port */
2673                         spin_unlock_irqrestore(&card->card_lock, flags);
2674                         cy_wait_until_sent(tty, info->timeout);
2675                         spin_lock_irqsave(&card->card_lock, flags);
2676                 }
2677         } else {
2678 #ifdef Z_WAKE
2679                 /* Waiting for on-board buffers to be empty before closing the port */
2680                 void __iomem *base_addr = card->base_addr;
2681                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2682                 struct ZFW_CTRL __iomem *zfw_ctrl =
2683                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2684                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2685                 int channel = info->line - card->first_line;
2686                 int retval;
2687
2688                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2689                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2690                         if (retval != 0) {
2691                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2692                                         "ttyC%d was %x\n", info->line, retval);
2693                         }
2694                         spin_unlock_irqrestore(&card->card_lock, flags);
2695                         wait_for_completion_interruptible(&info->shutdown_wait);
2696                         spin_lock_irqsave(&card->card_lock, flags);
2697                 }
2698 #endif
2699         }
2700
2701         spin_unlock_irqrestore(&card->card_lock, flags);
2702         shutdown(info);
2703         if (tty->driver->flush_buffer)
2704                 tty->driver->flush_buffer(tty);
2705         tty_ldisc_flush(tty);
2706         spin_lock_irqsave(&card->card_lock, flags);
2707
2708         tty->closing = 0;
2709         info->tty = NULL;
2710         if (info->blocked_open) {
2711                 spin_unlock_irqrestore(&card->card_lock, flags);
2712                 if (info->close_delay) {
2713                         msleep_interruptible(jiffies_to_msecs
2714                                                 (info->close_delay));
2715                 }
2716                 wake_up_interruptible(&info->open_wait);
2717                 spin_lock_irqsave(&card->card_lock, flags);
2718         }
2719         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2720         wake_up_interruptible(&info->close_wait);
2721
2722 #ifdef CY_DEBUG_OTHER
2723         printk(KERN_DEBUG "cyc:cy_close done\n");
2724 #endif
2725
2726         spin_unlock_irqrestore(&card->card_lock, flags);
2727 }                               /* cy_close */
2728
2729 /* This routine gets called when tty_write has put something into
2730  * the write_queue.  The characters may come from user space or
2731  * kernel space.
2732  *
2733  * This routine will return the number of characters actually
2734  * accepted for writing.
2735  *
2736  * If the port is not already transmitting stuff, start it off by
2737  * enabling interrupts.  The interrupt service routine will then
2738  * ensure that the characters are sent.
2739  * If the port is already active, there is no need to kick it.
2740  *
2741  */
2742 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2743 {
2744         struct cyclades_port *info = tty->driver_data;
2745         unsigned long flags;
2746         int c, ret = 0;
2747
2748 #ifdef CY_DEBUG_IO
2749         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2750 #endif
2751
2752         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2753                 return 0;
2754         }
2755
2756         if (!info->xmit_buf)
2757                 return 0;
2758
2759         spin_lock_irqsave(&info->card->card_lock, flags);
2760         while (1) {
2761                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2762                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2763
2764                 if (c <= 0)
2765                         break;
2766
2767                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2768                 info->xmit_head = (info->xmit_head + c) &
2769                         (SERIAL_XMIT_SIZE - 1);
2770                 info->xmit_cnt += c;
2771                 buf += c;
2772                 count -= c;
2773                 ret += c;
2774         }
2775         spin_unlock_irqrestore(&info->card->card_lock, flags);
2776
2777         info->idle_stats.xmit_bytes += ret;
2778         info->idle_stats.xmit_idle = jiffies;
2779
2780         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2781                 start_xmit(info);
2782         }
2783         return ret;
2784 }                               /* cy_write */
2785
2786 /*
2787  * This routine is called by the kernel to write a single
2788  * character to the tty device.  If the kernel uses this routine,
2789  * it must call the flush_chars() routine (if defined) when it is
2790  * done stuffing characters into the driver.  If there is no room
2791  * in the queue, the character is ignored.
2792  */
2793 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2794 {
2795         struct cyclades_port *info = tty->driver_data;
2796         unsigned long flags;
2797
2798 #ifdef CY_DEBUG_IO
2799         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2800 #endif
2801
2802         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2803                 return;
2804
2805         if (!info->xmit_buf)
2806                 return;
2807
2808         spin_lock_irqsave(&info->card->card_lock, flags);
2809         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2810                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2811                 return;
2812         }
2813
2814         info->xmit_buf[info->xmit_head++] = ch;
2815         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2816         info->xmit_cnt++;
2817         info->idle_stats.xmit_bytes++;
2818         info->idle_stats.xmit_idle = jiffies;
2819         spin_unlock_irqrestore(&info->card->card_lock, flags);
2820 }                               /* cy_put_char */
2821
2822 /*
2823  * This routine is called by the kernel after it has written a
2824  * series of characters to the tty device using put_char().
2825  */
2826 static void cy_flush_chars(struct tty_struct *tty)
2827 {
2828         struct cyclades_port *info = tty->driver_data;
2829
2830 #ifdef CY_DEBUG_IO
2831         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2832 #endif
2833
2834         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2835                 return;
2836
2837         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2838                         !info->xmit_buf)
2839                 return;
2840
2841         start_xmit(info);
2842 }                               /* cy_flush_chars */
2843
2844 /*
2845  * This routine returns the numbers of characters the tty driver
2846  * will accept for queuing to be written.  This number is subject
2847  * to change as output buffers get emptied, or if the output flow
2848  * control is activated.
2849  */
2850 static int cy_write_room(struct tty_struct *tty)
2851 {
2852         struct cyclades_port *info = tty->driver_data;
2853         int ret;
2854
2855 #ifdef CY_DEBUG_IO
2856         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2857 #endif
2858
2859         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2860                 return 0;
2861         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2862         if (ret < 0)
2863                 ret = 0;
2864         return ret;
2865 }                               /* cy_write_room */
2866
2867 static int cy_chars_in_buffer(struct tty_struct *tty)
2868 {
2869         struct cyclades_card *card;
2870         struct cyclades_port *info = tty->driver_data;
2871         int channel;
2872
2873         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2874                 return 0;
2875
2876         card = info->card;
2877         channel = (info->line) - (card->first_line);
2878
2879 #ifdef Z_EXT_CHARS_IN_BUFFER
2880         if (!IS_CYC_Z(cy_card[card])) {
2881 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2882 #ifdef CY_DEBUG_IO
2883                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2884                         info->line, info->xmit_cnt);
2885 #endif
2886                 return info->xmit_cnt;
2887 #ifdef Z_EXT_CHARS_IN_BUFFER
2888         } else {
2889                 static struct FIRM_ID *firm_id;
2890                 static struct ZFW_CTRL *zfw_ctrl;
2891                 static struct CH_CTRL *ch_ctrl;
2892                 static struct BUF_CTRL *buf_ctrl;
2893                 int char_count;
2894                 __u32 tx_put, tx_get, tx_bufsize;
2895
2896                 firm_id = card->base_addr + ID_ADDRESS;
2897                 zfw_ctrl = card->base_addr +
2898                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2899                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2900                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2901
2902                 tx_get = readl(&buf_ctrl->tx_get);
2903                 tx_put = readl(&buf_ctrl->tx_put);
2904                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2905                 if (tx_put >= tx_get)
2906                         char_count = tx_put - tx_get;
2907                 else
2908                         char_count = tx_put - tx_get + tx_bufsize;
2909 #ifdef CY_DEBUG_IO
2910                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2911                         info->line, info->xmit_cnt + char_count);
2912 #endif
2913                 return info->xmit_cnt + char_count;
2914         }
2915 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2916 }                               /* cy_chars_in_buffer */
2917
2918 /*
2919  * ------------------------------------------------------------
2920  * cy_ioctl() and friends
2921  * ------------------------------------------------------------
2922  */
2923
2924 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2925 {
2926         int co, co_val, bpr;
2927         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2928                         25000000);
2929
2930         if (baud == 0) {
2931                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2932                 return;
2933         }
2934
2935         /* determine which prescaler to use */
2936         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2937                 if (cy_clock / co_val / baud > 63)
2938                         break;
2939         }
2940
2941         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2942         if (bpr > 255)
2943                 bpr = 255;
2944
2945         info->tbpr = info->rbpr = bpr;
2946         info->tco = info->rco = co;
2947 }
2948
2949 /*
2950  * This routine finds or computes the various line characteristics.
2951  * It used to be called config_setup
2952  */
2953 static void set_line_char(struct cyclades_port *info)
2954 {
2955         struct cyclades_card *card;
2956         unsigned long flags;
2957         void __iomem *base_addr;
2958         int chip, channel, index;
2959         unsigned cflag, iflag;
2960         unsigned short chip_number;
2961         int baud, baud_rate = 0;
2962         int i;
2963
2964         if (!info->tty || !info->tty->termios) {
2965                 return;
2966         }
2967         if (info->line == -1) {
2968                 return;
2969         }
2970         cflag = info->tty->termios->c_cflag;
2971         iflag = info->tty->termios->c_iflag;
2972
2973         /*
2974          * Set up the tty->alt_speed kludge
2975          */
2976         if (info->tty) {
2977                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2978                         info->tty->alt_speed = 57600;
2979                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2980                         info->tty->alt_speed = 115200;
2981                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2982                         info->tty->alt_speed = 230400;
2983                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2984                         info->tty->alt_speed = 460800;
2985         }
2986
2987         card = info->card;
2988         channel = info->line - card->first_line;
2989         chip_number = channel / 4;
2990
2991         if (!IS_CYC_Z(*card)) {
2992
2993                 index = card->bus_index;
2994
2995                 /* baud rate */
2996                 baud = tty_get_baud_rate(info->tty);
2997                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
2998                                 ASYNC_SPD_CUST) {
2999                         if (info->custom_divisor)
3000                                 baud_rate = info->baud / info->custom_divisor;
3001                         else
3002                                 baud_rate = info->baud;
3003                 } else if (baud > CD1400_MAX_SPEED) {
3004                         baud = CD1400_MAX_SPEED;
3005                 }
3006                 /* find the baud index */
3007                 for (i = 0; i < 20; i++) {
3008                         if (baud == baud_table[i]) {
3009                                 break;
3010                         }
3011                 }
3012                 if (i == 20) {
3013                         i = 19; /* CD1400_MAX_SPEED */
3014                 }
3015
3016                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3017                                 ASYNC_SPD_CUST) {
3018                         cyy_baud_calc(info, baud_rate);
3019                 } else {
3020                         if (info->chip_rev >= CD1400_REV_J) {
3021                                 /* It is a CD1400 rev. J or later */
3022                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3023                                 info->tco = baud_co_60[i];      /* Tx CO */
3024                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3025                                 info->rco = baud_co_60[i];      /* Rx CO */
3026                         } else {
3027                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3028                                 info->tco = baud_co_25[i];      /* Tx CO */
3029                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3030                                 info->rco = baud_co_25[i];      /* Rx CO */
3031                         }
3032                 }
3033                 if (baud_table[i] == 134) {
3034                         /* get it right for 134.5 baud */
3035                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3036                                         2;
3037                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3038                                 ASYNC_SPD_CUST) {
3039                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3040                                         baud_rate) + 2;
3041                 } else if (baud_table[i]) {
3042                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3043                                         baud_table[i]) + 2;
3044                         /* this needs to be propagated into the card info */
3045                 } else {
3046                         info->timeout = 0;
3047                 }
3048                 /* By tradition (is it a standard?) a baud rate of zero
3049                    implies the line should be/has been closed.  A bit
3050                    later in this routine such a test is performed. */
3051
3052                 /* byte size and parity */
3053                 info->cor5 = 0;
3054                 info->cor4 = 0;
3055                 /* receive threshold */
3056                 info->cor3 = (info->default_threshold ?
3057                                 info->default_threshold : baud_cor3[i]);
3058                 info->cor2 = CyETC;
3059                 switch (cflag & CSIZE) {
3060                 case CS5:
3061                         info->cor1 = Cy_5_BITS;
3062                         break;
3063                 case CS6:
3064                         info->cor1 = Cy_6_BITS;
3065                         break;
3066                 case CS7:
3067                         info->cor1 = Cy_7_BITS;
3068                         break;
3069                 case CS8:
3070                         info->cor1 = Cy_8_BITS;
3071                         break;
3072                 }
3073                 if (cflag & CSTOPB) {
3074                         info->cor1 |= Cy_2_STOP;
3075                 }
3076                 if (cflag & PARENB) {
3077                         if (cflag & PARODD) {
3078                                 info->cor1 |= CyPARITY_O;
3079                         } else {
3080                                 info->cor1 |= CyPARITY_E;
3081                         }
3082                 } else {
3083                         info->cor1 |= CyPARITY_NONE;
3084                 }
3085
3086                 /* CTS flow control flag */
3087                 if (cflag & CRTSCTS) {
3088                         info->flags |= ASYNC_CTS_FLOW;
3089                         info->cor2 |= CyCtsAE;
3090                 } else {
3091                         info->flags &= ~ASYNC_CTS_FLOW;
3092                         info->cor2 &= ~CyCtsAE;
3093                 }
3094                 if (cflag & CLOCAL)
3095                         info->flags &= ~ASYNC_CHECK_CD;
3096                 else
3097                         info->flags |= ASYNC_CHECK_CD;
3098
3099          /***********************************************
3100             The hardware option, CyRtsAO, presents RTS when
3101             the chip has characters to send.  Since most modems
3102             use RTS as reverse (inbound) flow control, this
3103             option is not used.  If inbound flow control is
3104             necessary, DTR can be programmed to provide the
3105             appropriate signals for use with a non-standard
3106             cable.  Contact Marcio Saito for details.
3107          ***********************************************/
3108
3109                 chip = channel >> 2;
3110                 channel &= 0x03;
3111                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3112
3113                 spin_lock_irqsave(&card->card_lock, flags);
3114                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3115
3116                 /* tx and rx baud rate */
3117
3118                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3119                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3120                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3121                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3122
3123                 /* set line characteristics  according configuration */
3124
3125                 cy_writeb(base_addr + (CySCHR1 << index),
3126                           START_CHAR(info->tty));
3127                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3128                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3129                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3130                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3131                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3132                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3133
3134                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3135                                 CyCOR3ch, index);
3136
3137                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3138                 cy_writeb(base_addr + (CyRTPR << index),
3139                         (info->default_timeout ? info->default_timeout : 0x02));
3140                 /* 10ms rx timeout */
3141
3142                 if (C_CLOCAL(info->tty)) {
3143                         /* without modem intr */
3144                         cy_writeb(base_addr + (CySRER << index),
3145                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3146                         /* act on 1->0 modem transitions */
3147                         if ((cflag & CRTSCTS) && info->rflow) {
3148                                 cy_writeb(base_addr + (CyMCOR1 << index),
3149                                           (CyCTS | rflow_thr[i]));
3150                         } else {
3151                                 cy_writeb(base_addr + (CyMCOR1 << index),
3152                                           CyCTS);
3153                         }
3154                         /* act on 0->1 modem transitions */
3155                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3156                 } else {
3157                         /* without modem intr */
3158                         cy_writeb(base_addr + (CySRER << index),
3159                                   readb(base_addr +
3160                                            (CySRER << index)) | CyMdmCh);
3161                         /* act on 1->0 modem transitions */
3162                         if ((cflag & CRTSCTS) && info->rflow) {
3163                                 cy_writeb(base_addr + (CyMCOR1 << index),
3164                                           (CyDSR | CyCTS | CyRI | CyDCD |
3165                                            rflow_thr[i]));
3166                         } else {
3167                                 cy_writeb(base_addr + (CyMCOR1 << index),
3168                                           CyDSR | CyCTS | CyRI | CyDCD);
3169                         }
3170                         /* act on 0->1 modem transitions */
3171                         cy_writeb(base_addr + (CyMCOR2 << index),
3172                                   CyDSR | CyCTS | CyRI | CyDCD);
3173                 }
3174
3175                 if (i == 0) {   /* baud rate is zero, turn off line */
3176                         if (info->rtsdtr_inv) {
3177                                 cy_writeb(base_addr + (CyMSVR1 << index),
3178                                           ~CyRTS);
3179                         } else {
3180                                 cy_writeb(base_addr + (CyMSVR2 << index),
3181                                           ~CyDTR);
3182                         }
3183 #ifdef CY_DEBUG_DTR
3184                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3185                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3186                                 readb(base_addr + (CyMSVR1 << index)),
3187                                 readb(base_addr + (CyMSVR2 << index)));
3188 #endif
3189                 } else {
3190                         if (info->rtsdtr_inv) {
3191                                 cy_writeb(base_addr + (CyMSVR1 << index),
3192                                           CyRTS);
3193                         } else {
3194                                 cy_writeb(base_addr + (CyMSVR2 << index),
3195                                           CyDTR);
3196                         }
3197 #ifdef CY_DEBUG_DTR
3198                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3199                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3200                                 readb(base_addr + (CyMSVR1 << index)),
3201                                 readb(base_addr + (CyMSVR2 << index)));
3202 #endif
3203                 }
3204
3205                 if (info->tty) {
3206                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3207                 }
3208                 spin_unlock_irqrestore(&card->card_lock, flags);
3209
3210         } else {
3211                 struct FIRM_ID __iomem *firm_id;
3212                 struct ZFW_CTRL __iomem *zfw_ctrl;
3213                 struct BOARD_CTRL __iomem *board_ctrl;
3214                 struct CH_CTRL __iomem *ch_ctrl;
3215                 struct BUF_CTRL __iomem *buf_ctrl;
3216                 __u32 sw_flow;
3217                 int retval;
3218
3219                 firm_id = card->base_addr + ID_ADDRESS;
3220                 if (!ISZLOADED(*card)) {
3221                         return;
3222                 }
3223
3224                 zfw_ctrl = card->base_addr +
3225                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3226                 board_ctrl = &zfw_ctrl->board_ctrl;
3227                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3228                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3229
3230                 /* baud rate */
3231                 baud = tty_get_baud_rate(info->tty);
3232                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3233                                 ASYNC_SPD_CUST) {
3234                         if (info->custom_divisor)
3235                                 baud_rate = info->baud / info->custom_divisor;
3236                         else
3237                                 baud_rate = info->baud;
3238                 } else if (baud > CYZ_MAX_SPEED) {
3239                         baud = CYZ_MAX_SPEED;
3240                 }
3241                 cy_writel(&ch_ctrl->comm_baud, baud);
3242
3243                 if (baud == 134) {
3244                         /* get it right for 134.5 baud */
3245                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3246                                         2;
3247                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3248                                 ASYNC_SPD_CUST) {
3249                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3250                                         baud_rate) + 2;
3251                 } else if (baud) {
3252                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3253                                         baud) + 2;
3254                         /* this needs to be propagated into the card info */
3255                 } else {
3256                         info->timeout = 0;
3257                 }
3258
3259                 /* byte size and parity */
3260                 switch (cflag & CSIZE) {
3261                 case CS5:
3262                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3263                         break;
3264                 case CS6:
3265                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3266                         break;
3267                 case CS7:
3268                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3269                         break;
3270                 case CS8:
3271                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3272                         break;
3273                 }
3274                 if (cflag & CSTOPB) {
3275                         cy_writel(&ch_ctrl->comm_data_l,
3276                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3277                 } else {
3278                         cy_writel(&ch_ctrl->comm_data_l,
3279                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3280                 }
3281                 if (cflag & PARENB) {
3282                         if (cflag & PARODD) {
3283                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3284                         } else {
3285                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3286                         }
3287                 } else {
3288                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3289                 }
3290
3291                 /* CTS flow control flag */
3292                 if (cflag & CRTSCTS) {
3293                         cy_writel(&ch_ctrl->hw_flow,
3294                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3295                 } else {
3296                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3297                                         ~(C_RS_CTS | C_RS_RTS));
3298                 }
3299                 /* As the HW flow control is done in firmware, the driver
3300                    doesn't need to care about it */
3301                 info->flags &= ~ASYNC_CTS_FLOW;
3302
3303                 /* XON/XOFF/XANY flow control flags */
3304                 sw_flow = 0;
3305                 if (iflag & IXON) {
3306                         sw_flow |= C_FL_OXX;
3307                         if (iflag & IXANY)
3308                                 sw_flow |= C_FL_OIXANY;
3309                 }
3310                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3311
3312                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3313                 if (retval != 0) {
3314                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3315                                 "was %x\n", info->line, retval);
3316                 }
3317
3318                 /* CD sensitivity */
3319                 if (cflag & CLOCAL) {
3320                         info->flags &= ~ASYNC_CHECK_CD;
3321                 } else {
3322                         info->flags |= ASYNC_CHECK_CD;
3323                 }
3324
3325                 if (baud == 0) {        /* baud rate is zero, turn off line */
3326                         cy_writel(&ch_ctrl->rs_control,
3327                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3328 #ifdef CY_DEBUG_DTR
3329                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3330 #endif
3331                 } else {
3332                         cy_writel(&ch_ctrl->rs_control,
3333                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3334 #ifdef CY_DEBUG_DTR
3335                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3336 #endif
3337                 }
3338
3339                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3340                 if (retval != 0) {
3341                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3342                                 "was %x\n", info->line, retval);
3343                 }
3344
3345                 if (info->tty) {
3346                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3347                 }
3348         }
3349 }                               /* set_line_char */
3350
3351 static int
3352 get_serial_info(struct cyclades_port *info,
3353                 struct serial_struct __user * retinfo)
3354 {
3355         struct serial_struct tmp;
3356         struct cyclades_card *cinfo = info->card;
3357
3358         if (!retinfo)
3359                 return -EFAULT;
3360         memset(&tmp, 0, sizeof(tmp));
3361         tmp.type = info->type;
3362         tmp.line = info->line;
3363         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3364                 cinfo->first_line;
3365         tmp.irq = cinfo->irq;
3366         tmp.flags = info->flags;
3367         tmp.close_delay = info->close_delay;
3368         tmp.closing_wait = info->closing_wait;
3369         tmp.baud_base = info->baud;
3370         tmp.custom_divisor = info->custom_divisor;
3371         tmp.hub6 = 0;           /*!!! */
3372         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3373 }                               /* get_serial_info */
3374
3375 static int
3376 set_serial_info(struct cyclades_port *info,
3377                 struct serial_struct __user * new_info)
3378 {
3379         struct serial_struct new_serial;
3380         struct cyclades_port old_info;
3381
3382         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3383                 return -EFAULT;
3384         old_info = *info;
3385
3386         if (!capable(CAP_SYS_ADMIN)) {
3387                 if (new_serial.close_delay != info->close_delay ||
3388                                 new_serial.baud_base != info->baud ||
3389                                 (new_serial.flags & ASYNC_FLAGS &
3390                                         ~ASYNC_USR_MASK) !=
3391                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3392                         return -EPERM;
3393                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3394                                 (new_serial.flags & ASYNC_USR_MASK);
3395                 info->baud = new_serial.baud_base;
3396                 info->custom_divisor = new_serial.custom_divisor;
3397                 goto check_and_exit;
3398         }
3399
3400         /*
3401          * OK, past this point, all the error checking has been done.
3402          * At this point, we start making changes.....
3403          */
3404
3405         info->baud = new_serial.baud_base;
3406         info->custom_divisor = new_serial.custom_divisor;
3407         info->flags = (info->flags & ~ASYNC_FLAGS) |
3408                         (new_serial.flags & ASYNC_FLAGS);
3409         info->close_delay = new_serial.close_delay * HZ / 100;
3410         info->closing_wait = new_serial.closing_wait * HZ / 100;
3411
3412 check_and_exit:
3413         if (info->flags & ASYNC_INITIALIZED) {
3414                 set_line_char(info);
3415                 return 0;
3416         } else {
3417                 return startup(info);
3418         }
3419 }                               /* set_serial_info */
3420
3421 /*
3422  * get_lsr_info - get line status register info
3423  *
3424  * Purpose: Let user call ioctl() to get info when the UART physically
3425  *          is emptied.  On bus types like RS485, the transmitter must
3426  *          release the bus after transmitting. This must be done when
3427  *          the transmit shift register is empty, not be done when the
3428  *          transmit holding register is empty.  This functionality
3429  *          allows an RS485 driver to be written in user space.
3430  */
3431 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3432 {
3433         struct cyclades_card *card;
3434         int chip, channel, index;
3435         unsigned char status;
3436         unsigned int result;
3437         unsigned long flags;
3438         void __iomem *base_addr;
3439
3440         card = info->card;
3441         channel = (info->line) - (card->first_line);
3442         if (!IS_CYC_Z(*card)) {
3443                 chip = channel >> 2;
3444                 channel &= 0x03;
3445                 index = card->bus_index;
3446                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3447
3448                 spin_lock_irqsave(&card->card_lock, flags);
3449                 status = readb(base_addr + (CySRER << index)) &
3450                                 (CyTxRdy | CyTxMpty);
3451                 spin_unlock_irqrestore(&card->card_lock, flags);
3452                 result = (status ? 0 : TIOCSER_TEMT);
3453         } else {
3454                 /* Not supported yet */
3455                 return -EINVAL;
3456         }
3457         return put_user(result, (unsigned long __user *)value);
3458 }
3459
3460 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3461 {
3462         struct cyclades_port *info = tty->driver_data;
3463         struct cyclades_card *card;
3464         int chip, channel, index;
3465         void __iomem *base_addr;
3466         unsigned long flags;
3467         unsigned char status;
3468         unsigned long lstatus;
3469         unsigned int result;
3470         struct FIRM_ID __iomem *firm_id;
3471         struct ZFW_CTRL __iomem *zfw_ctrl;
3472         struct BOARD_CTRL __iomem *board_ctrl;
3473         struct CH_CTRL __iomem *ch_ctrl;
3474
3475         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3476                 return -ENODEV;
3477
3478         card = info->card;
3479         channel = info->line - card->first_line;
3480         if (!IS_CYC_Z(*card)) {
3481                 chip = channel >> 2;
3482                 channel &= 0x03;
3483                 index = card->bus_index;
3484                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3485
3486                 spin_lock_irqsave(&card->card_lock, flags);
3487                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3488                 status = readb(base_addr + (CyMSVR1 << index));
3489                 status |= readb(base_addr + (CyMSVR2 << index));
3490                 spin_unlock_irqrestore(&card->card_lock, flags);
3491
3492                 if (info->rtsdtr_inv) {
3493                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3494                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3495                 } else {
3496                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3497                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3498                 }
3499                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3500                         ((status & CyRI) ? TIOCM_RNG : 0) |
3501                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3502                         ((status & CyCTS) ? TIOCM_CTS : 0);
3503         } else {
3504                 base_addr = card->base_addr;
3505                 firm_id = card->base_addr + ID_ADDRESS;
3506                 if (ISZLOADED(*card)) {
3507                         zfw_ctrl = card->base_addr +
3508                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3509                         board_ctrl = &zfw_ctrl->board_ctrl;
3510                         ch_ctrl = zfw_ctrl->ch_ctrl;
3511                         lstatus = readl(&ch_ctrl[channel].rs_status);
3512                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3513                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3514                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3515                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3516                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3517                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3518                 } else {
3519                         result = 0;
3520                         return -ENODEV;
3521                 }
3522
3523         }
3524         return result;
3525 }                               /* cy_tiomget */
3526
3527 static int
3528 cy_tiocmset(struct tty_struct *tty, struct file *file,
3529                 unsigned int set, unsigned int clear)
3530 {
3531         struct cyclades_port *info = tty->driver_data;
3532         struct cyclades_card *card;
3533         int chip, channel, index;
3534         void __iomem *base_addr;
3535         unsigned long flags;
3536         struct FIRM_ID __iomem *firm_id;
3537         struct ZFW_CTRL __iomem *zfw_ctrl;
3538         struct BOARD_CTRL __iomem *board_ctrl;
3539         struct CH_CTRL __iomem *ch_ctrl;
3540         int retval;
3541
3542         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3543                 return -ENODEV;
3544
3545         card = info->card;
3546         channel = (info->line) - (card->first_line);
3547         if (!IS_CYC_Z(*card)) {
3548                 chip = channel >> 2;
3549                 channel &= 0x03;
3550                 index = card->bus_index;
3551                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3552
3553                 if (set & TIOCM_RTS) {
3554                         spin_lock_irqsave(&card->card_lock, flags);
3555                         cy_writeb(base_addr + (CyCAR << index),
3556                                   (u_char) channel);
3557                         if (info->rtsdtr_inv) {
3558                                 cy_writeb(base_addr + (CyMSVR2 << index),
3559                                           CyDTR);
3560                         } else {
3561                                 cy_writeb(base_addr + (CyMSVR1 << index),
3562                                           CyRTS);
3563                         }
3564                         spin_unlock_irqrestore(&card->card_lock, flags);
3565                 }
3566                 if (clear & TIOCM_RTS) {
3567                         spin_lock_irqsave(&card->card_lock, flags);
3568                         cy_writeb(base_addr + (CyCAR << index),
3569                                   (u_char) channel);
3570                         if (info->rtsdtr_inv) {
3571                                 cy_writeb(base_addr + (CyMSVR2 << index),
3572                                           ~CyDTR);
3573                         } else {
3574                                 cy_writeb(base_addr + (CyMSVR1 << index),
3575                                           ~CyRTS);
3576                         }
3577                         spin_unlock_irqrestore(&card->card_lock, flags);
3578                 }
3579                 if (set & TIOCM_DTR) {
3580                         spin_lock_irqsave(&card->card_lock, flags);
3581                         cy_writeb(base_addr + (CyCAR << index),
3582                                   (u_char) channel);
3583                         if (info->rtsdtr_inv) {
3584                                 cy_writeb(base_addr + (CyMSVR1 << index),
3585                                           CyRTS);
3586                         } else {
3587                                 cy_writeb(base_addr + (CyMSVR2 << index),
3588                                           CyDTR);
3589                         }
3590 #ifdef CY_DEBUG_DTR
3591                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3592                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3593                                 readb(base_addr + (CyMSVR1 << index)),
3594                                 readb(base_addr + (CyMSVR2 << index)));
3595 #endif
3596                         spin_unlock_irqrestore(&card->card_lock, flags);
3597                 }
3598                 if (clear & TIOCM_DTR) {
3599                         spin_lock_irqsave(&card->card_lock, flags);
3600                         cy_writeb(base_addr + (CyCAR << index),
3601                                   (u_char) channel);
3602                         if (info->rtsdtr_inv) {
3603                                 cy_writeb(base_addr + (CyMSVR1 << index),
3604                                           ~CyRTS);
3605                         } else {
3606                                 cy_writeb(base_addr + (CyMSVR2 << index),
3607                                           ~CyDTR);
3608                         }
3609
3610 #ifdef CY_DEBUG_DTR
3611                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3612                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3613                                 readb(base_addr + (CyMSVR1 << index)),
3614                                 readb(base_addr + (CyMSVR2 << index)));
3615 #endif
3616                         spin_unlock_irqrestore(&card->card_lock, flags);
3617                 }
3618         } else {
3619                 base_addr = card->base_addr;
3620
3621                 firm_id = card->base_addr + ID_ADDRESS;
3622                 if (ISZLOADED(*card)) {
3623                         zfw_ctrl = card->base_addr +
3624                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3625                         board_ctrl = &zfw_ctrl->board_ctrl;
3626                         ch_ctrl = zfw_ctrl->ch_ctrl;
3627
3628                         if (set & TIOCM_RTS) {
3629                                 spin_lock_irqsave(&card->card_lock, flags);
3630                                 cy_writel(&ch_ctrl[channel].rs_control,
3631                                         readl(&ch_ctrl[channel].rs_control) |
3632                                         C_RS_RTS);
3633                                 spin_unlock_irqrestore(&card->card_lock, flags);
3634                         }
3635                         if (clear & TIOCM_RTS) {
3636                                 spin_lock_irqsave(&card->card_lock, flags);
3637                                 cy_writel(&ch_ctrl[channel].rs_control,
3638                                         readl(&ch_ctrl[channel].rs_control) &
3639                                         ~C_RS_RTS);
3640                                 spin_unlock_irqrestore(&card->card_lock, flags);
3641                         }
3642                         if (set & TIOCM_DTR) {
3643                                 spin_lock_irqsave(&card->card_lock, flags);
3644                                 cy_writel(&ch_ctrl[channel].rs_control,
3645                                         readl(&ch_ctrl[channel].rs_control) |
3646                                         C_RS_DTR);
3647 #ifdef CY_DEBUG_DTR
3648                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3649                                         "Z DTR\n");
3650 #endif
3651                                 spin_unlock_irqrestore(&card->card_lock, flags);
3652                         }
3653                         if (clear & TIOCM_DTR) {
3654                                 spin_lock_irqsave(&card->card_lock, flags);
3655                                 cy_writel(&ch_ctrl[channel].rs_control,
3656                                         readl(&ch_ctrl[channel].rs_control) &
3657                                         ~C_RS_DTR);
3658 #ifdef CY_DEBUG_DTR
3659                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3660                                         "Z DTR\n");
3661 #endif
3662                                 spin_unlock_irqrestore(&card->card_lock, flags);
3663                         }
3664                 } else {
3665                         return -ENODEV;
3666                 }
3667                 spin_lock_irqsave(&card->card_lock, flags);
3668                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3669                 if (retval != 0) {
3670                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3671                                 "was %x\n", info->line, retval);
3672                 }
3673                 spin_unlock_irqrestore(&card->card_lock, flags);
3674         }
3675         return 0;
3676 }                               /* cy_tiocmset */
3677
3678 /*
3679  * cy_break() --- routine which turns the break handling on or off
3680  */
3681 static void cy_break(struct tty_struct *tty, int break_state)
3682 {
3683         struct cyclades_port *info = tty->driver_data;
3684         struct cyclades_card *card;
3685         unsigned long flags;
3686
3687         if (serial_paranoia_check(info, tty->name, "cy_break"))
3688                 return;
3689
3690         card = info->card;
3691
3692         spin_lock_irqsave(&card->card_lock, flags);
3693         if (!IS_CYC_Z(*card)) {
3694                 /* Let the transmit ISR take care of this (since it
3695                    requires stuffing characters into the output stream).
3696                  */
3697                 if (break_state == -1) {
3698                         if (!info->breakon) {
3699                                 info->breakon = 1;
3700                                 if (!info->xmit_cnt) {
3701                                         spin_unlock_irqrestore(&card->card_lock, flags);
3702                                         start_xmit(info);
3703                                         spin_lock_irqsave(&card->card_lock, flags);
3704                                 }
3705                         }
3706                 } else {
3707                         if (!info->breakoff) {
3708                                 info->breakoff = 1;
3709                                 if (!info->xmit_cnt) {
3710                                         spin_unlock_irqrestore(&card->card_lock, flags);
3711                                         start_xmit(info);
3712                                         spin_lock_irqsave(&card->card_lock, flags);
3713                                 }
3714                         }
3715                 }
3716         } else {
3717                 int retval;
3718
3719                 if (break_state == -1) {
3720                         retval = cyz_issue_cmd(card,
3721                                 info->line - card->first_line,
3722                                 C_CM_SET_BREAK, 0L);
3723                         if (retval != 0) {
3724                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3725                                         "ttyC%d was %x\n", info->line, retval);
3726                         }
3727                 } else {
3728                         retval = cyz_issue_cmd(card,
3729                                 info->line - card->first_line,
3730                                 C_CM_CLR_BREAK, 0L);
3731                         if (retval != 0) {
3732                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3733                                         "on ttyC%d was %x\n", info->line,
3734                                         retval);
3735                         }
3736                 }
3737         }
3738         spin_unlock_irqrestore(&card->card_lock, flags);
3739 }                               /* cy_break */
3740
3741 static int
3742 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3743 {
3744
3745         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3746                 return -EFAULT;
3747         info->mon.int_count = 0;
3748         info->mon.char_count = 0;
3749         info->mon.char_max = 0;
3750         info->mon.char_last = 0;
3751         return 0;
3752 }                               /* get_mon_info */
3753
3754 static int set_threshold(struct cyclades_port *info, unsigned long value)
3755 {
3756         struct cyclades_card *card;
3757         void __iomem *base_addr;
3758         int channel, chip, index;
3759         unsigned long flags;
3760
3761         card = info->card;
3762         channel = info->line - card->first_line;
3763         if (!IS_CYC_Z(*card)) {
3764                 chip = channel >> 2;
3765                 channel &= 0x03;
3766                 index = card->bus_index;
3767                 base_addr =
3768                     card->base_addr + (cy_chip_offset[chip] << index);
3769
3770                 info->cor3 &= ~CyREC_FIFO;
3771                 info->cor3 |= value & CyREC_FIFO;
3772
3773                 spin_lock_irqsave(&card->card_lock, flags);
3774                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3775                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3776                 spin_unlock_irqrestore(&card->card_lock, flags);
3777         }
3778         return 0;
3779 }                               /* set_threshold */
3780
3781 static int
3782 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3783 {
3784         struct cyclades_card *card;
3785         void __iomem *base_addr;
3786         int channel, chip, index;
3787         unsigned long tmp;
3788
3789         card = info->card;
3790         channel = info->line - card->first_line;
3791         if (!IS_CYC_Z(*card)) {
3792                 chip = channel >> 2;
3793                 channel &= 0x03;
3794                 index = card->bus_index;
3795                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3796
3797                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3798                 return put_user(tmp, value);
3799         }
3800         return 0;
3801 }                               /* get_threshold */
3802
3803 static int
3804 set_default_threshold(struct cyclades_port *info, unsigned long value)
3805 {
3806         info->default_threshold = value & 0x0f;
3807         return 0;
3808 }                               /* set_default_threshold */
3809
3810 static int
3811 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3812 {
3813         return put_user(info->default_threshold, value);
3814 }                               /* get_default_threshold */
3815
3816 static int set_timeout(struct cyclades_port *info, unsigned long value)
3817 {
3818         struct cyclades_card *card;
3819         void __iomem *base_addr;
3820         int channel, chip, index;
3821         unsigned long flags;
3822
3823         card = info->card;
3824         channel = info->line - card->first_line;
3825         if (!IS_CYC_Z(*card)) {
3826                 chip = channel >> 2;
3827                 channel &= 0x03;
3828                 index = card->bus_index;
3829                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3830
3831                 spin_lock_irqsave(&card->card_lock, flags);
3832                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3833                 spin_unlock_irqrestore(&card->card_lock, flags);
3834         }
3835         return 0;
3836 }                               /* set_timeout */
3837
3838 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3839 {
3840         struct cyclades_card *card;
3841         void __iomem *base_addr;
3842         int channel, chip, index;
3843         unsigned long tmp;
3844
3845         card = info->card;
3846         channel = info->line - card->first_line;
3847         if (!IS_CYC_Z(*card)) {
3848                 chip = channel >> 2;
3849                 channel &= 0x03;
3850                 index = card->bus_index;
3851                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3852
3853                 tmp = readb(base_addr + (CyRTPR << index));
3854                 return put_user(tmp, value);
3855         }
3856         return 0;
3857 }                               /* get_timeout */
3858
3859 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3860 {
3861         info->default_timeout = value & 0xff;
3862         return 0;
3863 }                               /* set_default_timeout */
3864
3865 static int
3866 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3867 {
3868         return put_user(info->default_timeout, value);
3869 }                               /* get_default_timeout */
3870
3871 /*
3872  * This routine allows the tty driver to implement device-
3873  * specific ioctl's.  If the ioctl number passed in cmd is
3874  * not recognized by the driver, it should return ENOIOCTLCMD.
3875  */
3876 static int
3877 cy_ioctl(struct tty_struct *tty, struct file *file,
3878          unsigned int cmd, unsigned long arg)
3879 {
3880         struct cyclades_port *info = tty->driver_data;
3881         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3882         struct serial_icounter_struct __user *p_cuser;  /* user space */
3883         int ret_val = 0;
3884         unsigned long flags;
3885         void __user *argp = (void __user *)arg;
3886
3887         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3888                 return -ENODEV;
3889
3890 #ifdef CY_DEBUG_OTHER
3891         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3892                 info->line, cmd, arg);
3893 #endif
3894
3895         switch (cmd) {
3896         case CYGETMON:
3897                 ret_val = get_mon_info(info, argp);
3898                 break;
3899         case CYGETTHRESH:
3900                 ret_val = get_threshold(info, argp);
3901                 break;
3902         case CYSETTHRESH:
3903                 ret_val = set_threshold(info, arg);
3904                 break;
3905         case CYGETDEFTHRESH:
3906                 ret_val = get_default_threshold(info, argp);
3907                 break;
3908         case CYSETDEFTHRESH:
3909                 ret_val = set_default_threshold(info, arg);
3910                 break;
3911         case CYGETTIMEOUT:
3912                 ret_val = get_timeout(info, argp);
3913                 break;
3914         case CYSETTIMEOUT:
3915                 ret_val = set_timeout(info, arg);
3916                 break;
3917         case CYGETDEFTIMEOUT:
3918                 ret_val = get_default_timeout(info, argp);
3919                 break;
3920         case CYSETDEFTIMEOUT:
3921                 ret_val = set_default_timeout(info, arg);
3922                 break;
3923         case CYSETRFLOW:
3924                 info->rflow = (int)arg;
3925                 ret_val = 0;
3926                 break;
3927         case CYGETRFLOW:
3928                 ret_val = info->rflow;
3929                 break;
3930         case CYSETRTSDTR_INV:
3931                 info->rtsdtr_inv = (int)arg;
3932                 ret_val = 0;
3933                 break;
3934         case CYGETRTSDTR_INV:
3935                 ret_val = info->rtsdtr_inv;
3936                 break;
3937         case CYGETCD1400VER:
3938                 ret_val = info->chip_rev;
3939                 break;
3940 #ifndef CONFIG_CYZ_INTR
3941         case CYZSETPOLLCYCLE:
3942                 cyz_polling_cycle = (arg * HZ) / 1000;
3943                 ret_val = 0;
3944                 break;
3945         case CYZGETPOLLCYCLE:
3946                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3947                 break;
3948 #endif                          /* CONFIG_CYZ_INTR */
3949         case CYSETWAIT:
3950                 info->closing_wait = (unsigned short)arg *HZ / 100;
3951                 ret_val = 0;
3952                 break;
3953         case CYGETWAIT:
3954                 ret_val = info->closing_wait / (HZ / 100);
3955                 break;
3956         case TIOCGSERIAL:
3957                 ret_val = get_serial_info(info, argp);
3958                 break;
3959         case TIOCSSERIAL:
3960                 ret_val = set_serial_info(info, argp);
3961                 break;
3962         case TIOCSERGETLSR:     /* Get line status register */
3963                 ret_val = get_lsr_info(info, argp);
3964                 break;
3965                 /*
3966                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3967                  * - mask passed in arg for lines of interest
3968                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3969                  * Caller should use TIOCGICOUNT to see which one it was
3970                  */
3971         case TIOCMIWAIT:
3972                 spin_lock_irqsave(&info->card->card_lock, flags);
3973                 /* note the counters on entry */
3974                 cnow = info->icount;
3975                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3976                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3977                         cprev = cnow;
3978                         spin_lock_irqsave(&info->card->card_lock, flags);
3979                         cnow = info->icount;    /* atomic copy */
3980                         spin_unlock_irqrestore(&info->card->card_lock, flags);
3981
3982                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3983                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3984                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
3985                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3986                 }));
3987                 break;
3988
3989                 /*
3990                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3991                  * Return: write counters to the user passed counter struct
3992                  * NB: both 1->0 and 0->1 transitions are counted except for
3993                  *     RI where only 0->1 is counted.
3994                  */
3995         case TIOCGICOUNT:
3996                 spin_lock_irqsave(&info->card->card_lock, flags);
3997                 cnow = info->icount;
3998                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3999                 p_cuser = argp;
4000                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4001                 if (ret_val)
4002                         return ret_val;
4003                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4004                 if (ret_val)
4005                         return ret_val;
4006                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4007                 if (ret_val)
4008                         return ret_val;
4009                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4010                 if (ret_val)
4011                         return ret_val;
4012                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4013                 if (ret_val)
4014                         return ret_val;
4015                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4016                 if (ret_val)
4017                         return ret_val;
4018                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4019                 if (ret_val)
4020                         return ret_val;
4021                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4022                 if (ret_val)
4023                         return ret_val;
4024                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4025                 if (ret_val)
4026                         return ret_val;
4027                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4028                 if (ret_val)
4029                         return ret_val;
4030                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4031                 if (ret_val)
4032                         return ret_val;
4033                 ret_val = 0;
4034                 break;
4035         default:
4036                 ret_val = -ENOIOCTLCMD;
4037         }
4038
4039 #ifdef CY_DEBUG_OTHER
4040         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4041 #endif
4042
4043         return ret_val;
4044 }                               /* cy_ioctl */
4045
4046 /*
4047  * This routine allows the tty driver to be notified when
4048  * device's termios settings have changed.  Note that a
4049  * well-designed tty driver should be prepared to accept the case
4050  * where old == NULL, and try to do something rational.
4051  */
4052 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4053 {
4054         struct cyclades_port *info = tty->driver_data;
4055
4056 #ifdef CY_DEBUG_OTHER
4057         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4058 #endif
4059
4060         set_line_char(info);
4061
4062         if ((old_termios->c_cflag & CRTSCTS) &&
4063                         !(tty->termios->c_cflag & CRTSCTS)) {
4064                 tty->hw_stopped = 0;
4065                 cy_start(tty);
4066         }
4067 #if 0
4068         /*
4069          * No need to wake up processes in open wait, since they
4070          * sample the CLOCAL flag once, and don't recheck it.
4071          * XXX  It's not clear whether the current behavior is correct
4072          * or not.  Hence, this may change.....
4073          */
4074         if (!(old_termios->c_cflag & CLOCAL) &&
4075             (tty->termios->c_cflag & CLOCAL))
4076                 wake_up_interruptible(&info->open_wait);
4077 #endif
4078 }                               /* cy_set_termios */
4079
4080 /* This function is used to send a high-priority XON/XOFF character to
4081    the device.
4082 */
4083 static void cy_send_xchar(struct tty_struct *tty, char ch)
4084 {
4085         struct cyclades_port *info = tty->driver_data;
4086         struct cyclades_card *card;
4087         int channel;
4088
4089         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4090                 return;
4091
4092         info->x_char = ch;
4093
4094         if (ch)
4095                 cy_start(tty);
4096
4097         card = info->card;
4098         channel = info->line - card->first_line;
4099
4100         if (IS_CYC_Z(*card)) {
4101                 if (ch == STOP_CHAR(tty))
4102                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4103                 else if (ch == START_CHAR(tty))
4104                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4105         }
4106 }
4107
4108 /* This routine is called by the upper-layer tty layer to signal
4109    that incoming characters should be throttled because the input
4110    buffers are close to full.
4111  */
4112 static void cy_throttle(struct tty_struct *tty)
4113 {
4114         struct cyclades_port *info = tty->driver_data;
4115         struct cyclades_card *card;
4116         unsigned long flags;
4117         void __iomem *base_addr;
4118         int chip, channel, index;
4119
4120 #ifdef CY_DEBUG_THROTTLE
4121         char buf[64];
4122
4123         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4124                         tty->ldisc.chars_in_buffer(tty), info->line);
4125 #endif
4126
4127         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4128                 return;
4129         }
4130
4131         card = info->card;
4132
4133         if (I_IXOFF(tty)) {
4134                 if (!IS_CYC_Z(*card))
4135                         cy_send_xchar(tty, STOP_CHAR(tty));
4136                 else
4137                         info->throttle = 1;
4138         }
4139
4140         if (tty->termios->c_cflag & CRTSCTS) {
4141                 channel = info->line - card->first_line;
4142                 if (!IS_CYC_Z(*card)) {
4143                         chip = channel >> 2;
4144                         channel &= 0x03;
4145                         index = card->bus_index;
4146                         base_addr = card->base_addr +
4147                                 (cy_chip_offset[chip] << index);
4148
4149                         spin_lock_irqsave(&card->card_lock, flags);
4150                         cy_writeb(base_addr + (CyCAR << index),
4151                                   (u_char) channel);
4152                         if (info->rtsdtr_inv) {
4153                                 cy_writeb(base_addr + (CyMSVR2 << index),
4154                                           ~CyDTR);
4155                         } else {
4156                                 cy_writeb(base_addr + (CyMSVR1 << index),
4157                                           ~CyRTS);
4158                         }
4159                         spin_unlock_irqrestore(&card->card_lock, flags);
4160                 } else {
4161                         info->throttle = 1;
4162                 }
4163         }
4164 }                               /* cy_throttle */
4165
4166 /*
4167  * This routine notifies the tty driver that it should signal
4168  * that characters can now be sent to the tty without fear of
4169  * overrunning the input buffers of the line disciplines.
4170  */
4171 static void cy_unthrottle(struct tty_struct *tty)
4172 {
4173         struct cyclades_port *info = tty->driver_data;
4174         struct cyclades_card *card;
4175         unsigned long flags;
4176         void __iomem *base_addr;
4177         int chip, channel, index;
4178
4179 #ifdef CY_DEBUG_THROTTLE
4180         char buf[64];
4181
4182         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4183                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4184 #endif
4185
4186         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4187                 return;
4188         }
4189
4190         if (I_IXOFF(tty)) {
4191                 if (info->x_char)
4192                         info->x_char = 0;
4193                 else
4194                         cy_send_xchar(tty, START_CHAR(tty));
4195         }
4196
4197         if (tty->termios->c_cflag & CRTSCTS) {
4198                 card = info->card;
4199                 channel = info->line - card->first_line;
4200                 if (!IS_CYC_Z(*card)) {
4201                         chip = channel >> 2;
4202                         channel &= 0x03;
4203                         index = card->bus_index;
4204                         base_addr = card->base_addr +
4205                                 (cy_chip_offset[chip] << index);
4206
4207                         spin_lock_irqsave(&card->card_lock, flags);
4208                         cy_writeb(base_addr + (CyCAR << index),
4209                                   (u_char) channel);
4210                         if (info->rtsdtr_inv) {
4211                                 cy_writeb(base_addr + (CyMSVR2 << index),
4212                                           CyDTR);
4213                         } else {
4214                                 cy_writeb(base_addr + (CyMSVR1 << index),
4215                                           CyRTS);
4216                         }
4217                         spin_unlock_irqrestore(&card->card_lock, flags);
4218                 } else {
4219                         info->throttle = 0;
4220                 }
4221         }
4222 }                               /* cy_unthrottle */
4223
4224 /* cy_start and cy_stop provide software output flow control as a
4225    function of XON/XOFF, software CTS, and other such stuff.
4226 */
4227 static void cy_stop(struct tty_struct *tty)
4228 {
4229         struct cyclades_card *cinfo;
4230         struct cyclades_port *info = tty->driver_data;
4231         void __iomem *base_addr;
4232         int chip, channel, index;
4233         unsigned long flags;
4234
4235 #ifdef CY_DEBUG_OTHER
4236         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4237 #endif
4238
4239         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4240                 return;
4241
4242         cinfo = info->card;
4243         channel = info->line - cinfo->first_line;
4244         if (!IS_CYC_Z(*cinfo)) {
4245                 index = cinfo->bus_index;
4246                 chip = channel >> 2;
4247                 channel &= 0x03;
4248                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4249
4250                 spin_lock_irqsave(&cinfo->card_lock, flags);
4251                 cy_writeb(base_addr + (CyCAR << index),
4252                         (u_char)(channel & 0x0003)); /* index channel */
4253                 cy_writeb(base_addr + (CySRER << index),
4254                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4255                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4256         }
4257 }                               /* cy_stop */
4258
4259 static void cy_start(struct tty_struct *tty)
4260 {
4261         struct cyclades_card *cinfo;
4262         struct cyclades_port *info = tty->driver_data;
4263         void __iomem *base_addr;
4264         int chip, channel, index;
4265         unsigned long flags;
4266
4267 #ifdef CY_DEBUG_OTHER
4268         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4269 #endif
4270
4271         if (serial_paranoia_check(info, tty->name, "cy_start"))
4272                 return;
4273
4274         cinfo = info->card;
4275         channel = info->line - cinfo->first_line;
4276         index = cinfo->bus_index;
4277         if (!IS_CYC_Z(*cinfo)) {
4278                 chip = channel >> 2;
4279                 channel &= 0x03;
4280                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4281
4282                 spin_lock_irqsave(&cinfo->card_lock, flags);
4283                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4284                 cy_writeb(base_addr + (CySRER << index),
4285                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4286                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4287         }
4288 }                               /* cy_start */
4289
4290 static void cy_flush_buffer(struct tty_struct *tty)
4291 {
4292         struct cyclades_port *info = tty->driver_data;
4293         struct cyclades_card *card;
4294         int channel, retval;
4295         unsigned long flags;
4296
4297 #ifdef CY_DEBUG_IO
4298         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4299 #endif
4300
4301         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4302                 return;
4303
4304         card = info->card;
4305         channel = info->line - card->first_line;
4306
4307         spin_lock_irqsave(&card->card_lock, flags);
4308         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4309         spin_unlock_irqrestore(&card->card_lock, flags);
4310
4311         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4312                                            buffers as well */
4313                 spin_lock_irqsave(&card->card_lock, flags);
4314                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4315                 if (retval != 0) {
4316                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4317                                 "was %x\n", info->line, retval);
4318                 }
4319                 spin_unlock_irqrestore(&card->card_lock, flags);
4320         }
4321         tty_wakeup(tty);
4322 }                               /* cy_flush_buffer */
4323
4324 /*
4325  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4326  */
4327 static void cy_hangup(struct tty_struct *tty)
4328 {
4329         struct cyclades_port *info = tty->driver_data;
4330
4331 #ifdef CY_DEBUG_OTHER
4332         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4333 #endif
4334
4335         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4336                 return;
4337
4338         cy_flush_buffer(tty);
4339         shutdown(info);
4340         info->count = 0;
4341 #ifdef CY_DEBUG_COUNT
4342         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4343                 current->pid);
4344 #endif
4345         info->tty = NULL;
4346         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4347         wake_up_interruptible(&info->open_wait);
4348 }                               /* cy_hangup */
4349
4350 /*
4351  * ---------------------------------------------------------------------
4352  * cy_init() and friends
4353  *
4354  * cy_init() is called at boot-time to initialize the serial driver.
4355  * ---------------------------------------------------------------------
4356  */
4357
4358 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4359 {
4360         struct cyclades_port *info;
4361         u32 uninitialized_var(mailbox);
4362         unsigned int nports;
4363         unsigned short chip_number;
4364         int uninitialized_var(index), port;
4365
4366         spin_lock_init(&cinfo->card_lock);
4367
4368         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4369                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4370                                      cinfo->ctl_addr)->mail_box_0);
4371                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4372                 cinfo->intr_enabled = 0;
4373                 cinfo->nports = 0;      /* Will be correctly set later, after
4374                                            Z FW is loaded */
4375         } else {
4376                 index = cinfo->bus_index;
4377                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4378         }
4379
4380         cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4381         if (cinfo->ports == NULL) {
4382                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4383                 cinfo->nports = 0;
4384                 return -ENOMEM;
4385         }
4386
4387         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4388                         port++) {
4389                 info = &cinfo->ports[port - cinfo->first_line];
4390                 info->magic = CYCLADES_MAGIC;
4391                 info->card = cinfo;
4392                 info->line = port;
4393                 info->flags = STD_COM_FLAGS;
4394                 info->closing_wait = CLOSING_WAIT_DELAY;
4395                 info->close_delay = 5 * HZ / 10;
4396
4397                 init_waitqueue_head(&info->open_wait);
4398                 init_waitqueue_head(&info->close_wait);
4399                 init_completion(&info->shutdown_wait);
4400                 init_waitqueue_head(&info->delta_msr_wait);
4401
4402                 if (IS_CYC_Z(*cinfo)) {
4403                         info->type = PORT_STARTECH;
4404                         if (mailbox == ZO_V1)
4405                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4406                         else
4407                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4408 #ifdef CONFIG_CYZ_INTR
4409                         setup_timer(&cyz_rx_full_timer[port],
4410                                 cyz_rx_restart, (unsigned long)info);
4411 #endif
4412                 } else {
4413                         info->type = PORT_CIRRUS;
4414                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4415                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4416                         info->cor2 = CyETC;
4417                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4418
4419                         chip_number = (port - cinfo->first_line) / 4;
4420                         if ((info->chip_rev = readb(cinfo->base_addr +
4421                                       (cy_chip_offset[chip_number] <<
4422                                        index) + (CyGFRCR << index))) >=
4423                             CD1400_REV_J) {
4424                                 /* It is a CD1400 rev. J or later */
4425                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4426                                 info->tco = baud_co_60[13];     /* Tx CO */
4427                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4428                                 info->rco = baud_co_60[13];     /* Rx CO */
4429                                 info->rtsdtr_inv = 1;
4430                         } else {
4431                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4432                                 info->tco = baud_co_25[13];     /* Tx CO */
4433                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4434                                 info->rco = baud_co_25[13];     /* Rx CO */
4435                                 info->rtsdtr_inv = 0;
4436                         }
4437                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4438                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4439                 }
4440
4441         }
4442
4443 #ifndef CONFIG_CYZ_INTR
4444         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4445                 mod_timer(&cyz_timerlist, jiffies + 1);
4446 #ifdef CY_PCI_DEBUG
4447                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4448 #endif
4449         }
4450 #endif
4451         return 0;
4452 }
4453
4454 /* initialize chips on Cyclom-Y card -- return number of valid
4455    chips (which is number of ports/4) */
4456 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4457                 int index)
4458 {
4459         unsigned int chip_number;
4460         void __iomem *base_addr;
4461
4462         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4463         /* Cy_HwReset is 0x1400 */
4464         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4465         /* Cy_ClrIntr is 0x1800 */
4466         udelay(500L);
4467
4468         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4469                 base_addr =
4470                     true_base_addr + (cy_chip_offset[chip_number] << index);
4471                 mdelay(1);
4472                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4473                         /*************
4474                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4475                         chip_number, (unsigned long)base_addr);
4476                         *************/
4477                         return chip_number;
4478                 }
4479
4480                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4481                 udelay(10L);
4482
4483                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4484                    cannot distinguish between references to chip 0 and a non-
4485                    existent chip 4.  If the preceding clearing of the supposed
4486                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4487                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4488                  */
4489                 if (chip_number == 4 && readb(true_base_addr +
4490                                 (cy_chip_offset[0] << index) +
4491                                 (CyGFRCR << index)) == 0) {
4492                         return chip_number;
4493                 }
4494
4495                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4496                 mdelay(1);
4497
4498                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4499                         /*
4500                            printk(" chip #%d at %#6lx is not responding ",
4501                            chip_number, (unsigned long)base_addr);
4502                            printk("(GFRCR stayed 0)\n",
4503                          */
4504                         return chip_number;
4505                 }
4506                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4507                                 0x40) {
4508                         /*
4509                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4510                                         "%#2x)\n",
4511                                         chip_number, (unsigned long)base_addr,
4512                                         base_addr[CyGFRCR<<index]);
4513                          */
4514                         return chip_number;
4515                 }
4516                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4517                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4518                         /* It is a CD1400 rev. J or later */
4519                         /* Impossible to reach 5ms with this chip.
4520                            Changed to 2ms instead (f = 500 Hz). */
4521                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4522                 } else {
4523                         /* f = 200 Hz */
4524                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4525                 }
4526
4527                 /*
4528                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4529                    chip_number, (unsigned long)base_addr,
4530                    readb(base_addr+(CyGFRCR<<index)));
4531                  */
4532         }
4533         return chip_number;
4534 }                               /* cyy_init_card */
4535
4536 /*
4537  * ---------------------------------------------------------------------
4538  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4539  * sets global variables and return the number of ISA boards found.
4540  * ---------------------------------------------------------------------
4541  */
4542 static int __init cy_detect_isa(void)
4543 {
4544 #ifdef CONFIG_ISA
4545         unsigned short cy_isa_irq, nboard;
4546         void __iomem *cy_isa_address;
4547         unsigned short i, j, cy_isa_nchan;
4548 #ifdef MODULE
4549         int isparam = 0;
4550 #endif
4551
4552         nboard = 0;
4553
4554 #ifdef MODULE
4555         /* Check for module parameters */
4556         for (i = 0; i < NR_CARDS; i++) {
4557                 if (maddr[i] || i) {
4558                         isparam = 1;
4559                         cy_isa_addresses[i] = maddr[i];
4560                 }
4561                 if (!maddr[i])
4562                         break;
4563         }
4564 #endif
4565
4566         /* scan the address table probing for Cyclom-Y/ISA boards */
4567         for (i = 0; i < NR_ISA_ADDRS; i++) {
4568                 unsigned int isa_address = cy_isa_addresses[i];
4569                 if (isa_address == 0x0000) {
4570                         return nboard;
4571                 }
4572
4573                 /* probe for CD1400... */
4574                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4575                 if (cy_isa_address == NULL) {
4576                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4577                                         "address\n");
4578                         continue;
4579                 }
4580                 cy_isa_nchan = CyPORTS_PER_CHIP *
4581                         cyy_init_card(cy_isa_address, 0);
4582                 if (cy_isa_nchan == 0) {
4583                         iounmap(cy_isa_address);
4584                         continue;
4585                 }
4586 #ifdef MODULE
4587                 if (isparam && irq[i])
4588                         cy_isa_irq = irq[i];
4589                 else
4590 #endif
4591                         /* find out the board's irq by probing */
4592                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4593                 if (cy_isa_irq == 0) {
4594                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4595                                 "IRQ could not be detected.\n",
4596                                 (unsigned long)cy_isa_address);
4597                         iounmap(cy_isa_address);
4598                         continue;
4599                 }
4600
4601                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4602                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4603                                 "more channels are available. Change NR_PORTS "
4604                                 "in cyclades.c and recompile kernel.\n",
4605                                 (unsigned long)cy_isa_address);
4606                         iounmap(cy_isa_address);
4607                         return nboard;
4608                 }
4609                 /* fill the next cy_card structure available */
4610                 for (j = 0; j < NR_CARDS; j++) {
4611                         if (cy_card[j].base_addr == NULL)
4612                                 break;
4613                 }
4614                 if (j == NR_CARDS) {    /* no more cy_cards available */
4615                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4616                                 "more cards can be used. Change NR_CARDS in "
4617                                 "cyclades.c and recompile kernel.\n",
4618                                 (unsigned long)cy_isa_address);
4619                         iounmap(cy_isa_address);
4620                         return nboard;
4621                 }
4622
4623                 /* allocate IRQ */
4624                 if (request_irq(cy_isa_irq, cyy_interrupt,
4625                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4626                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4627                                 "could not allocate IRQ#%d.\n",
4628                                 (unsigned long)cy_isa_address, cy_isa_irq);
4629                         iounmap(cy_isa_address);
4630                         return nboard;
4631                 }
4632
4633                 /* set cy_card */
4634                 cy_card[j].base_addr = cy_isa_address;
4635                 cy_card[j].ctl_addr = NULL;
4636                 cy_card[j].irq = (int)cy_isa_irq;
4637                 cy_card[j].bus_index = 0;
4638                 cy_card[j].first_line = cy_next_channel;
4639                 cy_card[j].num_chips = cy_isa_nchan / 4;
4640                 if (cy_init_card(&cy_card[j])) {
4641                         cy_card[j].base_addr = NULL;
4642                         free_irq(cy_isa_irq, &cy_card[j]);
4643                         iounmap(cy_isa_address);
4644                         continue;
4645                 }
4646                 nboard++;
4647
4648                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4649                         "%d channels starting from port %d\n",
4650                         j + 1, (unsigned long)cy_isa_address,
4651                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4652                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4653
4654                 for (j = cy_next_channel;
4655                                 j < cy_next_channel + cy_isa_nchan; j++)
4656                         tty_register_device(cy_serial_driver, j, NULL);
4657                 cy_next_channel += cy_isa_nchan;
4658         }
4659         return nboard;
4660 #else
4661         return 0;
4662 #endif                          /* CONFIG_ISA */
4663 }                               /* cy_detect_isa */
4664
4665 #ifdef CONFIG_PCI
4666 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4667 {
4668         unsigned int a;
4669
4670         for (a = 0; a < size && *str; a++, str++)
4671                 if (*str & 0x80)
4672                         return -EINVAL;
4673
4674         for (; a < size; a++, str++)
4675                 if (*str)
4676                         return -EINVAL;
4677
4678         return 0;
4679 }
4680
4681 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4682                 unsigned int size)
4683 {
4684         for (; size > 0; size--) {
4685                 cy_writel(fpga, *data++);
4686                 udelay(10);
4687         }
4688 }
4689
4690 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4691                 struct RUNTIME_9060 __iomem *addr)
4692 {
4693         /* Reset PLX */
4694         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4695         udelay(100L);
4696         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4697
4698         /* Reload Config. Registers from EEPROM */
4699         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4700         udelay(100L);
4701         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4702
4703         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4704          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4705          * registers. This will remain here until we find a permanent fix.
4706          */
4707         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4708 }
4709
4710 static int __devinit __cyz_load_fw(const struct firmware *fw,
4711                 const char *name, const u32 mailbox, void __iomem *base,
4712                 void __iomem *fpga)
4713 {
4714         void *ptr = fw->data;
4715         struct zfile_header *h = ptr;
4716         struct zfile_config *c, *cs;
4717         struct zfile_block *b, *bs;
4718         unsigned int a, tmp, len = fw->size;
4719 #define BAD_FW KERN_ERR "Bad firmware: "
4720         if (len < sizeof(*h)) {
4721                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4722                 return -EINVAL;
4723         }
4724
4725         cs = ptr + h->config_offset;
4726         bs = ptr + h->block_offset;
4727
4728         if ((void *)(cs + h->n_config) > ptr + len ||
4729                         (void *)(bs + h->n_blocks) > ptr + len) {
4730                 printk(BAD_FW "too short");
4731                 return  -EINVAL;
4732         }
4733
4734         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4735                         cyc_isfwstr(h->date, sizeof(h->date))) {
4736                 printk(BAD_FW "bad formatted header string\n");
4737                 return -EINVAL;
4738         }
4739
4740         if (strncmp(name, h->name, sizeof(h->name))) {
4741                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4742                 return -EINVAL;
4743         }
4744
4745         tmp = 0;
4746         for (c = cs; c < cs + h->n_config; c++) {
4747                 for (a = 0; a < c->n_blocks; a++)
4748                         if (c->block_list[a] > h->n_blocks) {
4749                                 printk(BAD_FW "bad block ref number in cfgs\n");
4750                                 return -EINVAL;
4751                         }
4752                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4753                         tmp++;
4754         }
4755         if (!tmp) {
4756                 printk(BAD_FW "nothing appropriate\n");
4757                 return -EINVAL;
4758         }
4759
4760         for (b = bs; b < bs + h->n_blocks; b++)
4761                 if (b->file_offset + b->size > len) {
4762                         printk(BAD_FW "bad block data offset\n");
4763                         return -EINVAL;
4764                 }
4765
4766         /* everything is OK, let's seek'n'load it */
4767         for (c = cs; c < cs + h->n_config; c++)
4768                 if (c->mailbox == mailbox && c->function == 0)
4769                         break;
4770
4771         for (a = 0; a < c->n_blocks; a++) {
4772                 b = &bs[c->block_list[a]];
4773                 if (b->type == ZBLOCK_FPGA) {
4774                         if (fpga != NULL)
4775                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4776                                                 b->size);
4777                 } else {
4778                         if (base != NULL)
4779                                 memcpy_toio(base + b->ram_offset,
4780                                                ptr + b->file_offset, b->size);
4781                 }
4782         }
4783 #undef BAD_FW
4784         return 0;
4785 }
4786
4787 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4788                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4789 {
4790         const struct firmware *fw;
4791         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4792         struct CUSTOM_REG __iomem *cust = base_addr;
4793         struct ZFW_CTRL __iomem *pt_zfwctrl;
4794         void __iomem *tmp;
4795         u32 mailbox, status;
4796         unsigned int i;
4797         int retval;
4798
4799         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4800         if (retval) {
4801                 dev_err(&pdev->dev, "can't get firmware\n");
4802                 goto err;
4803         }
4804
4805         /* Check whether the firmware is already loaded and running. If
4806            positive, skip this board */
4807         if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4808                 u32 cntval = readl(base_addr + 0x190);
4809
4810                 udelay(100);
4811                 if (cntval != readl(base_addr + 0x190)) {
4812                         /* FW counter is working, FW is running */
4813                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4814                                         "Skipping board.\n");
4815                         retval = 0;
4816                         goto err_rel;
4817                 }
4818         }
4819
4820         /* start boot */
4821         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4822                         ~0x00030800UL);
4823
4824         mailbox = readl(&ctl_addr->mail_box_0);
4825
4826         if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4827                 /* stops CPU and set window to beginning of RAM */
4828                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4829                 cy_writel(&cust->cpu_stop, 0);
4830                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4831                 udelay(100);
4832         }
4833
4834         plx_init(pdev, irq, ctl_addr);
4835
4836         if (mailbox != 0) {
4837                 /* load FPGA */
4838                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4839                                 base_addr);
4840                 if (retval)
4841                         goto err_rel;
4842                 if (!Z_FPGA_LOADED(ctl_addr)) {
4843                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4844                                         "not loaded\n");
4845                         goto err_rel;
4846                 }
4847         }
4848
4849         /* stops CPU and set window to beginning of RAM */
4850         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4851         cy_writel(&cust->cpu_stop, 0);
4852         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4853         udelay(100);
4854
4855         /* clear memory */
4856         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4857                 cy_writeb(tmp, 255);
4858         if (mailbox != 0) {
4859                 /* set window to last 512K of RAM */
4860                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4861                 //sleep(1);
4862                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4863                         cy_writeb(tmp, 255);
4864                 /* set window to beginning of RAM */
4865                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4866                 //sleep(1);
4867         }
4868
4869         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4870         release_firmware(fw);
4871         if (retval)
4872                 goto err;
4873
4874         /* finish boot and start boards */
4875         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4876         cy_writel(&cust->cpu_start, 0);
4877         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4878         i = 0;
4879         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4880                 msleep(100);
4881         if (status != ZFIRM_ID) {
4882                 if (status == ZFIRM_HLT) {
4883                         dev_err(&pdev->dev, "you need an external power supply "
4884                                 "for this number of ports. Firmware halted and "
4885                                 "board reset.\n");
4886                         retval = -EIO;
4887                         goto err;
4888                 }
4889                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4890                                 "some more time\n", status);
4891                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4892                                 i++ < 200)
4893                         msleep(100);
4894                 if (status != ZFIRM_ID) {
4895                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4896                                         "Giving up. (fid->signature = 0x%x)\n",
4897                                         status);
4898                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4899                                 "upgrading the FW, please power cycle the "
4900                                 "system before loading the new FW to the "
4901                                 "Cyclades-Z.\n");
4902
4903                         if (Z_FPGA_LOADED(ctl_addr))
4904                                 plx_init(pdev, irq, ctl_addr);
4905
4906                         retval = -EIO;
4907                         goto err;
4908                 }
4909                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4910                                 i / 10);
4911         }
4912         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4913
4914         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4915                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4916                         base_addr + readl(&fid->zfwctrl_addr));
4917
4918         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4919                 readl(&pt_zfwctrl->board_ctrl.fw_version),
4920                 readl(&pt_zfwctrl->board_ctrl.n_channel));
4921
4922         if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4923                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4924                         "check the connection between the Z host card and the "
4925                         "serial expanders.\n");
4926
4927                 if (Z_FPGA_LOADED(ctl_addr))
4928                         plx_init(pdev, irq, ctl_addr);
4929
4930                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4931                                 "reset.\n");
4932                 retval = 0;
4933                 goto err;
4934         }
4935
4936         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4937         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4938
4939         /*
4940            Early firmware failed to start looking for commands.
4941            This enables firmware interrupts for those commands.
4942          */
4943         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4944                         (1 << 17));
4945         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4946                         0x00030800UL);
4947
4948         plx_init(pdev, irq, ctl_addr);
4949
4950         return 0;
4951 err_rel:
4952         release_firmware(fw);
4953 err:
4954         return retval;
4955 }
4956
4957 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4958                 const struct pci_device_id *ent)
4959 {
4960         void __iomem *addr0 = NULL, *addr2 = NULL;
4961         char *card_name = NULL;
4962         u32 mailbox;
4963         unsigned int device_id, nchan = 0, card_no, i;
4964         unsigned char plx_ver;
4965         int retval, irq;
4966
4967         retval = pci_enable_device(pdev);
4968         if (retval) {
4969                 dev_err(&pdev->dev, "cannot enable device\n");
4970                 goto err;
4971         }
4972
4973         /* read PCI configuration area */
4974         irq = pdev->irq;
4975         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4976
4977 #if defined(__alpha__)
4978         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4979                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4980                         "addresses on Alpha systems.\n");
4981                 retval = -EIO;
4982                 goto err_dis;
4983         }
4984 #endif
4985         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4986                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4987                         "addresses\n");
4988                 retval = -EIO;
4989                 goto err_dis;
4990         }
4991
4992         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4993                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4994                                 "it...\n");
4995                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4996         }
4997
4998         retval = pci_request_regions(pdev, "cyclades");
4999         if (retval) {
5000                 dev_err(&pdev->dev, "failed to reserve resources\n");
5001                 goto err_dis;
5002         }
5003
5004         retval = -EIO;
5005         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5006                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5007                 card_name = "Cyclom-Y";
5008
5009                 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5010                 if (addr0 == NULL) {
5011                         dev_err(&pdev->dev, "can't remap ctl region\n");
5012                         goto err_reg;
5013                 }
5014                 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5015                 if (addr2 == NULL) {
5016                         dev_err(&pdev->dev, "can't remap base region\n");
5017                         goto err_unmap;
5018                 }
5019
5020                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5021                 if (nchan == 0) {
5022                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5023                                         "Serial-Modules\n");
5024                         return -EIO;
5025                 }
5026         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5027                 struct RUNTIME_9060 __iomem *ctl_addr;
5028
5029                 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5030                 if (addr0 == NULL) {
5031                         dev_err(&pdev->dev, "can't remap ctl region\n");
5032                         goto err_reg;
5033                 }
5034
5035                 /* Disable interrupts on the PLX before resetting it */
5036                 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5037
5038                 plx_init(pdev, irq, addr0);
5039
5040                 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5041
5042                 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5043                                 CyPCI_Ze_win : CyPCI_Zwin);
5044                 if (addr2 == NULL) {
5045                         dev_err(&pdev->dev, "can't remap base region\n");
5046                         goto err_unmap;
5047                 }
5048
5049                 if (mailbox == ZE_V1) {
5050                         card_name = "Cyclades-Ze";
5051
5052                         readl(&ctl_addr->mail_box_0);
5053                         nchan = ZE_V1_NPORTS;
5054                 } else {
5055                         card_name = "Cyclades-8Zo";
5056
5057 #ifdef CY_PCI_DEBUG
5058                         if (mailbox == ZO_V1) {
5059                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5060                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5061                                         "id %lx, ver %lx\n", (ulong)(0xff &
5062                                         readl(&((struct CUSTOM_REG *)addr2)->
5063                                                 fpga_id)), (ulong)(0xff &
5064                                         readl(&((struct CUSTOM_REG *)addr2)->
5065                                                 fpga_version)));
5066                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5067                         } else {
5068                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5069                                         "Cyclades-Z board.  FPGA not loaded\n");
5070                         }
5071 #endif
5072                         /* The following clears the firmware id word.  This
5073                            ensures that the driver will not attempt to talk to
5074                            the board until it has been properly initialized.
5075                          */
5076                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5077                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5078
5079                         retval = cyz_load_fw(pdev, addr2, addr0, irq);
5080                         if (retval)
5081                                 goto err_unmap;
5082                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5083                            version will have a different device_id and will
5084                            be allocated its maximum number of ports. */
5085                         nchan = 8;
5086                 }
5087         }
5088
5089         if ((cy_next_channel + nchan) > NR_PORTS) {
5090                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5091                         "channels are available. Change NR_PORTS in "
5092                         "cyclades.c and recompile kernel.\n");
5093                 goto err_unmap;
5094         }
5095         /* fill the next cy_card structure available */
5096         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5097                 if (cy_card[card_no].base_addr == NULL)
5098                         break;
5099         }
5100         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5101                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5102                         "more cards can be used. Change NR_CARDS in "
5103                         "cyclades.c and recompile kernel.\n");
5104                 goto err_unmap;
5105         }
5106
5107         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5108                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5109                 /* allocate IRQ */
5110                 retval = request_irq(irq, cyy_interrupt,
5111                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5112                 if (retval) {
5113                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5114                         goto err_unmap;
5115                 }
5116                 cy_card[card_no].num_chips = nchan / 4;
5117         } else {
5118 #ifdef CONFIG_CYZ_INTR
5119                 /* allocate IRQ only if board has an IRQ */
5120                 if (irq != 0 && irq != 255) {
5121                         retval = request_irq(irq, cyz_interrupt,
5122                                         IRQF_SHARED, "Cyclades-Z",
5123                                         &cy_card[card_no]);
5124                         if (retval) {
5125                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5126                                 goto err_unmap;
5127                         }
5128                 }
5129 #endif                          /* CONFIG_CYZ_INTR */
5130                 cy_card[card_no].num_chips = -1;
5131         }
5132
5133         /* set cy_card */
5134         cy_card[card_no].base_addr = addr2;
5135         cy_card[card_no].ctl_addr = addr0;
5136         cy_card[card_no].irq = irq;
5137         cy_card[card_no].bus_index = 1;
5138         cy_card[card_no].first_line = cy_next_channel;
5139         retval = cy_init_card(&cy_card[card_no]);
5140         if (retval)
5141                 goto err_null;
5142
5143         pci_set_drvdata(pdev, &cy_card[card_no]);
5144
5145         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5146                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5147                 /* enable interrupts in the PCI interface */
5148                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5149                 switch (plx_ver) {
5150                 case PLX_9050:
5151
5152                         cy_writeb(addr0 + 0x4c, 0x43);
5153                         break;
5154
5155                 case PLX_9060:
5156                 case PLX_9080:
5157                 default:        /* Old boards, use PLX_9060 */
5158                         plx_init(pdev, irq, addr0);
5159                         cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5160                         break;
5161                 }
5162         }
5163
5164         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5165                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5166         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5167                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5168         cy_next_channel += nchan;
5169
5170         return 0;
5171 err_null:
5172         cy_card[card_no].base_addr = NULL;
5173         free_irq(irq, &cy_card[card_no]);
5174 err_unmap:
5175         pci_iounmap(pdev, addr0);
5176         if (addr2)
5177                 pci_iounmap(pdev, addr2);
5178 err_reg:
5179         pci_release_regions(pdev);
5180 err_dis:
5181         pci_disable_device(pdev);
5182 err:
5183         return retval;
5184 }
5185
5186 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5187 {
5188         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5189         unsigned int i;
5190
5191         /* non-Z with old PLX */
5192         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5193                         PLX_9050)
5194                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5195         else
5196 #ifndef CONFIG_CYZ_INTR
5197                 if (!IS_CYC_Z(*cinfo))
5198 #endif
5199                 cy_writew(cinfo->ctl_addr + 0x68,
5200                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5201
5202         pci_iounmap(pdev, cinfo->base_addr);
5203         if (cinfo->ctl_addr)
5204                 pci_iounmap(pdev, cinfo->ctl_addr);
5205         if (cinfo->irq
5206 #ifndef CONFIG_CYZ_INTR
5207                 && !IS_CYC_Z(*cinfo)
5208 #endif /* CONFIG_CYZ_INTR */
5209                 )
5210                 free_irq(cinfo->irq, cinfo);
5211         pci_release_regions(pdev);
5212
5213         cinfo->base_addr = NULL;
5214         for (i = cinfo->first_line; i < cinfo->first_line +
5215                         cinfo->nports; i++)
5216                 tty_unregister_device(cy_serial_driver, i);
5217         cinfo->nports = 0;
5218         kfree(cinfo->ports);
5219 }
5220
5221 static struct pci_driver cy_pci_driver = {
5222         .name = "cyclades",
5223         .id_table = cy_pci_dev_id,
5224         .probe = cy_pci_probe,
5225         .remove = __devexit_p(cy_pci_remove)
5226 };
5227 #endif
5228
5229 static int
5230 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5231                 int *eof, void *data)
5232 {
5233         struct cyclades_port *info;
5234         unsigned int i, j;
5235         int len = 0;
5236         off_t begin = 0;
5237         off_t pos = 0;
5238         int size;
5239         __u32 cur_jifs = jiffies;
5240
5241         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5242                         "IdleIn  Overruns  Ldisc\n");
5243
5244         pos += size;
5245         len += size;
5246
5247         /* Output one line for each known port */
5248         for (i = 0; i < NR_CARDS; i++)
5249                 for (j = 0; j < cy_card[i].nports; j++) {
5250                         info = &cy_card[i].ports[j];
5251
5252                         if (info->count)
5253                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5254                                         "%10lu %8lu %9lu %6ld\n", info->line,
5255                                         (cur_jifs - info->idle_stats.in_use) /
5256                                         HZ, info->idle_stats.xmit_bytes,
5257                                         (cur_jifs - info->idle_stats.xmit_idle)/
5258                                         HZ, info->idle_stats.recv_bytes,
5259                                         (cur_jifs - info->idle_stats.recv_idle)/
5260                                         HZ, info->idle_stats.overruns,
5261                                         (long)info->tty->ldisc.num);
5262                         else
5263                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5264                                         "%10lu %8lu %9lu %6ld\n",
5265                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5266                         len += size;
5267                         pos = begin + len;
5268
5269                         if (pos < offset) {
5270                                 len = 0;
5271                                 begin = pos;
5272                         }
5273                         if (pos > offset + length)
5274                                 goto done;
5275                 }
5276         *eof = 1;
5277 done:
5278         *start = buf + (offset - begin);        /* Start of wanted data */
5279         len -= (offset - begin);        /* Start slop */
5280         if (len > length)
5281                 len = length;   /* Ending slop */
5282         if (len < 0)
5283                 len = 0;
5284         return len;
5285 }
5286
5287 /* The serial driver boot-time initialization code!
5288     Hardware I/O ports are mapped to character special devices on a
5289     first found, first allocated manner.  That is, this code searches
5290     for Cyclom cards in the system.  As each is found, it is probed
5291     to discover how many chips (and thus how many ports) are present.
5292     These ports are mapped to the tty ports 32 and upward in monotonic
5293     fashion.  If an 8-port card is replaced with a 16-port card, the
5294     port mapping on a following card will shift.
5295
5296     This approach is different from what is used in the other serial
5297     device driver because the Cyclom is more properly a multiplexer,
5298     not just an aggregation of serial ports on one card.
5299
5300     If there are more cards with more ports than have been
5301     statically allocated above, a warning is printed and the
5302     extra ports are ignored.
5303  */
5304
5305 static const struct tty_operations cy_ops = {
5306         .open = cy_open,
5307         .close = cy_close,
5308         .write = cy_write,
5309         .put_char = cy_put_char,
5310         .flush_chars = cy_flush_chars,
5311         .write_room = cy_write_room,
5312         .chars_in_buffer = cy_chars_in_buffer,
5313         .flush_buffer = cy_flush_buffer,
5314         .ioctl = cy_ioctl,
5315         .throttle = cy_throttle,
5316         .unthrottle = cy_unthrottle,
5317         .set_termios = cy_set_termios,
5318         .stop = cy_stop,
5319         .start = cy_start,
5320         .hangup = cy_hangup,
5321         .break_ctl = cy_break,
5322         .wait_until_sent = cy_wait_until_sent,
5323         .read_proc = cyclades_get_proc_info,
5324         .tiocmget = cy_tiocmget,
5325         .tiocmset = cy_tiocmset,
5326 };
5327
5328 static int __init cy_init(void)
5329 {
5330         unsigned int nboards;
5331         int retval = -ENOMEM;
5332
5333         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5334         if (!cy_serial_driver)
5335                 goto err;
5336
5337         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5338                         __DATE__, __TIME__);
5339
5340         /* Initialize the tty_driver structure */
5341
5342         cy_serial_driver->owner = THIS_MODULE;
5343         cy_serial_driver->driver_name = "cyclades";
5344         cy_serial_driver->name = "ttyC";
5345         cy_serial_driver->major = CYCLADES_MAJOR;
5346         cy_serial_driver->minor_start = 0;
5347         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5348         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5349         cy_serial_driver->init_termios = tty_std_termios;
5350         cy_serial_driver->init_termios.c_cflag =
5351             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5352         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5353         tty_set_operations(cy_serial_driver, &cy_ops);
5354
5355         retval = tty_register_driver(cy_serial_driver);
5356         if (retval) {
5357                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5358                 goto err_frtty;
5359         }
5360
5361         /* the code below is responsible to find the boards. Each different
5362            type of board has its own detection routine. If a board is found,
5363            the next cy_card structure available is set by the detection
5364            routine. These functions are responsible for checking the
5365            availability of cy_card and cy_port data structures and updating
5366            the cy_next_channel. */
5367
5368         /* look for isa boards */
5369         nboards = cy_detect_isa();
5370
5371 #ifdef CONFIG_PCI
5372         /* look for pci boards */
5373         retval = pci_register_driver(&cy_pci_driver);
5374         if (retval && !nboards)
5375                 goto err_unr;
5376 #endif
5377
5378         return 0;
5379 err_unr:
5380         tty_unregister_driver(cy_serial_driver);
5381 err_frtty:
5382         put_tty_driver(cy_serial_driver);
5383 err:
5384         return retval;
5385 }                               /* cy_init */
5386
5387 static void __exit cy_cleanup_module(void)
5388 {
5389         struct cyclades_card *card;
5390         int i, e1;
5391
5392 #ifndef CONFIG_CYZ_INTR
5393         del_timer_sync(&cyz_timerlist);
5394 #endif /* CONFIG_CYZ_INTR */
5395
5396         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5397                 printk(KERN_ERR "failed to unregister Cyclades serial "
5398                                 "driver(%d)\n", e1);
5399
5400 #ifdef CONFIG_PCI
5401         pci_unregister_driver(&cy_pci_driver);
5402 #endif
5403
5404         for (i = 0; i < NR_CARDS; i++) {
5405                 card = &cy_card[i];
5406                 if (card->base_addr) {
5407                         /* clear interrupt */
5408                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5409                         iounmap(card->base_addr);
5410                         if (card->ctl_addr)
5411                                 iounmap(card->ctl_addr);
5412                         if (card->irq
5413 #ifndef CONFIG_CYZ_INTR
5414                                 && !IS_CYC_Z(*card)
5415 #endif /* CONFIG_CYZ_INTR */
5416                                 )
5417                                 free_irq(card->irq, card);
5418                         for (e1 = card->first_line;
5419                                         e1 < card->first_line +
5420                                         card->nports; e1++)
5421                                 tty_unregister_device(cy_serial_driver, e1);
5422                         kfree(card->ports);
5423                 }
5424         }
5425
5426         put_tty_driver(cy_serial_driver);
5427 } /* cy_cleanup_module */
5428
5429 module_init(cy_init);
5430 module_exit(cy_cleanup_module);
5431
5432 MODULE_LICENSE("GPL");
5433 MODULE_VERSION(CY_VERSION);