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 == (unsigned int)-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 len, index = cinfo->bus_index;
 989         u8 save_xir, channel, save_car, data, char_count;
 990
 991 #ifdef CY_DEBUG_INTERRUPTS
 992         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
 993 #endif
 994         /* determine the channel & change to that context */
 995         save_xir = readb(base_addr + (CyRIR << index));
 996         channel = save_xir & CyIRChannel;
 997         info = &cinfo->ports[channel + chip * 4];
 998         save_car = readb(base_addr + (CyCAR << index));
 999         cy_writeb(base_addr + (CyCAR << index), save_xir);
1000
1001         /* if there is nowhere to put the data, discard it */
1002         if (info->tty == NULL) {
1003                 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1004                                 CyIVRRxEx) {    /* exception */
1005                         data = readb(base_addr + (CyRDSR << index));
1006                 } else {        /* normal character reception */
1007                         char_count = readb(base_addr + (CyRDCR << index));
1008                         while (char_count--)
1009                                 data = readb(base_addr + (CyRDSR << index));
1010                 }
1011                 goto end;
1012         }
1013         /* there is an open port for this data */
1014         tty = info->tty;
1015         if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1016                         CyIVRRxEx) {    /* exception */
1017                 data = readb(base_addr + (CyRDSR << index));
1018
1019                 /* For statistics only */
1020                 if (data & CyBREAK)
1021                         info->icount.brk++;
1022                 else if (data & CyFRAME)
1023                         info->icount.frame++;
1024                 else if (data & CyPARITY)
1025                         info->icount.parity++;
1026                 else if (data & CyOVERRUN)
1027                         info->icount.overrun++;
1028
1029                 if (data & info->ignore_status_mask) {
1030                         info->icount.rx++;
1031                         return;
1032                 }
1033                 if (tty_buffer_request_room(tty, 1)) {
1034                         if (data & info->read_status_mask) {
1035                                 if (data & CyBREAK) {
1036                                         tty_insert_flip_char(tty,
1037                                                 readb(base_addr + (CyRDSR <<
1038                                                         index)), TTY_BREAK);
1039                                         info->icount.rx++;
1040                                         if (info->flags & ASYNC_SAK)
1041                                                 do_SAK(tty);
1042                                 } else if (data & CyFRAME) {
1043                                         tty_insert_flip_char( tty,
1044                                                 readb(base_addr + (CyRDSR <<
1045                                                         index)), TTY_FRAME);
1046                                         info->icount.rx++;
1047                                         info->idle_stats.frame_errs++;
1048                                 } else if (data & CyPARITY) {
1049                                         /* Pieces of seven... */
1050                                         tty_insert_flip_char(tty,
1051                                                 readb(base_addr + (CyRDSR <<
1052                                                         index)), TTY_PARITY);
1053                                         info->icount.rx++;
1054                                         info->idle_stats.parity_errs++;
1055                                 } else if (data & CyOVERRUN) {
1056                                         tty_insert_flip_char(tty, 0,
1057                                                         TTY_OVERRUN);
1058                                         info->icount.rx++;
1059                                         /* If the flip buffer itself is
1060                                            overflowing, we still lose
1061                                            the next incoming character.
1062                                          */
1063                                         tty_insert_flip_char(tty,
1064                                                 readb(base_addr + (CyRDSR <<
1065                                                         index)), TTY_FRAME);
1066                                         info->icount.rx++;
1067                                         info->idle_stats.overruns++;
1068                                 /* These two conditions may imply */
1069                                 /* a normal read should be done. */
1070                                 /* } else if(data & CyTIMEOUT) { */
1071                                 /* } else if(data & CySPECHAR) { */
1072                                 } else {
1073                                         tty_insert_flip_char(tty, 0,
1074                                                         TTY_NORMAL);
1075                                         info->icount.rx++;
1076                                 }
1077                         } else {
1078                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1079                                 info->icount.rx++;
1080                         }
1081                 } else {
1082                         /* there was a software buffer overrun and nothing
1083                          * could be done about it!!! */
1084                         info->icount.buf_overrun++;
1085                         info->idle_stats.overruns++;
1086                 }
1087         } else {        /* normal character reception */
1088                 /* load # chars available from the chip */
1089                 char_count = readb(base_addr + (CyRDCR << index));
1090
1091 #ifdef CY_ENABLE_MONITORING
1092                 ++info->mon.int_count;
1093                 info->mon.char_count += char_count;
1094                 if (char_count > info->mon.char_max)
1095                         info->mon.char_max = char_count;
1096                 info->mon.char_last = char_count;
1097 #endif
1098                 len = tty_buffer_request_room(tty, char_count);
1099                 while (len--) {
1100                         data = readb(base_addr + (CyRDSR << index));
1101                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1102                         info->idle_stats.recv_bytes++;
1103                         info->icount.rx++;
1104 #ifdef CY_16Y_HACK
1105                         udelay(10L);
1106 #endif
1107                 }
1108                 info->idle_stats.recv_idle = jiffies;
1109         }
1110         tty_schedule_flip(tty);
1111 end:
1112         /* end of service */
1113         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1114         cy_writeb(base_addr + (CyCAR << index), save_car);
1115 }
1116
1117 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1118                 void __iomem *base_addr)
1119 {
1120         struct cyclades_port *info;
1121         int char_count, index = cinfo->bus_index;
1122         u8 save_xir, channel, save_car, outch;
1123
1124         /* Since we only get here when the transmit buffer
1125            is empty, we know we can always stuff a dozen
1126            characters. */
1127 #ifdef CY_DEBUG_INTERRUPTS
1128         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1129 #endif
1130
1131         /* determine the channel & change to that context */
1132         save_xir = readb(base_addr + (CyTIR << index));
1133         channel = save_xir & CyIRChannel;
1134         save_car = readb(base_addr + (CyCAR << index));
1135         cy_writeb(base_addr + (CyCAR << index), save_xir);
1136
1137         /* validate the port# (as configured and open) */
1138         if (channel + chip * 4 >= cinfo->nports) {
1139                 cy_writeb(base_addr + (CySRER << index),
1140                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1141                 goto end;
1142         }
1143         info = &cinfo->ports[channel + chip * 4];
1144         if (info->tty == NULL) {
1145                 cy_writeb(base_addr + (CySRER << index),
1146                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1147                 goto end;
1148         }
1149
1150         /* load the on-chip space for outbound data */
1151         char_count = info->xmit_fifo_size;
1152
1153         if (info->x_char) {     /* send special char */
1154                 outch = info->x_char;
1155                 cy_writeb(base_addr + (CyTDR << index), outch);
1156                 char_count--;
1157                 info->icount.tx++;
1158                 info->x_char = 0;
1159         }
1160
1161         if (info->breakon || info->breakoff) {
1162                 if (info->breakon) {
1163                         cy_writeb(base_addr + (CyTDR << index), 0);
1164                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1165                         info->breakon = 0;
1166                         char_count -= 2;
1167                 }
1168                 if (info->breakoff) {
1169                         cy_writeb(base_addr + (CyTDR << index), 0);
1170                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1171                         info->breakoff = 0;
1172                         char_count -= 2;
1173                 }
1174         }
1175
1176         while (char_count-- > 0) {
1177                 if (!info->xmit_cnt) {
1178                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1179                                 cy_writeb(base_addr + (CySRER << index),
1180                                         readb(base_addr + (CySRER << index)) &
1181                                                 ~CyTxMpty);
1182                         } else {
1183                                 cy_writeb(base_addr + (CySRER << index),
1184                                         (readb(base_addr + (CySRER << index)) &
1185                                                 ~CyTxRdy) | CyTxMpty);
1186                         }
1187                         goto done;
1188                 }
1189                 if (info->xmit_buf == NULL) {
1190                         cy_writeb(base_addr + (CySRER << index),
1191                                 readb(base_addr + (CySRER << index)) &
1192                                         ~CyTxRdy);
1193                         goto done;
1194                 }
1195                 if (info->tty->stopped || info->tty->hw_stopped) {
1196                         cy_writeb(base_addr + (CySRER << index),
1197                                 readb(base_addr + (CySRER << index)) &
1198                                         ~CyTxRdy);
1199                         goto done;
1200                 }
1201                 /* Because the Embedded Transmit Commands have been enabled,
1202                  * we must check to see if the escape character, NULL, is being
1203                  * sent. If it is, we must ensure that there is room for it to
1204                  * be doubled in the output stream.  Therefore we no longer
1205                  * advance the pointer when the character is fetched, but
1206                  * rather wait until after the check for a NULL output
1207                  * character. This is necessary because there may not be room
1208                  * for the two chars needed to send a NULL.)
1209                  */
1210                 outch = info->xmit_buf[info->xmit_tail];
1211                 if (outch) {
1212                         info->xmit_cnt--;
1213                         info->xmit_tail = (info->xmit_tail + 1) &
1214                                         (SERIAL_XMIT_SIZE - 1);
1215                         cy_writeb(base_addr + (CyTDR << index), outch);
1216                         info->icount.tx++;
1217                 } else {
1218                         if (char_count > 1) {
1219                                 info->xmit_cnt--;
1220                                 info->xmit_tail = (info->xmit_tail + 1) &
1221                                         (SERIAL_XMIT_SIZE - 1);
1222                                 cy_writeb(base_addr + (CyTDR << index), outch);
1223                                 cy_writeb(base_addr + (CyTDR << index), 0);
1224                                 info->icount.tx++;
1225                                 char_count--;
1226                         }
1227                 }
1228         }
1229
1230 done:
1231         tty_wakeup(info->tty);
1232 end:
1233         /* end of service */
1234         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1235         cy_writeb(base_addr + (CyCAR << index), save_car);
1236 }
1237
1238 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1239                 void __iomem *base_addr)
1240 {
1241         struct cyclades_port *info;
1242         int index = cinfo->bus_index;
1243         u8 save_xir, channel, save_car, mdm_change, mdm_status;
1244
1245         /* determine the channel & change to that context */
1246         save_xir = readb(base_addr + (CyMIR << index));
1247         channel = save_xir & CyIRChannel;
1248         info = &cinfo->ports[channel + chip * 4];
1249         save_car = readb(base_addr + (CyCAR << index));
1250         cy_writeb(base_addr + (CyCAR << index), save_xir);
1251
1252         mdm_change = readb(base_addr + (CyMISR << index));
1253         mdm_status = readb(base_addr + (CyMSVR1 << index));
1254
1255         if (!info->tty)
1256                 goto end;
1257
1258         if (mdm_change & CyANY_DELTA) {
1259                 /* For statistics only */
1260                 if (mdm_change & CyDCD)
1261                         info->icount.dcd++;
1262                 if (mdm_change & CyCTS)
1263                         info->icount.cts++;
1264                 if (mdm_change & CyDSR)
1265                         info->icount.dsr++;
1266                 if (mdm_change & CyRI)
1267                         info->icount.rng++;
1268
1269                 wake_up_interruptible(&info->delta_msr_wait);
1270         }
1271
1272         if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1273                 if (!(mdm_status & CyDCD)) {
1274                         tty_hangup(info->tty);
1275                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1276                 }
1277                 wake_up_interruptible(&info->open_wait);
1278         }
1279         if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1280                 if (info->tty->hw_stopped) {
1281                         if (mdm_status & CyCTS) {
1282                                 /* cy_start isn't used
1283                                    because... !!! */
1284                                 info->tty->hw_stopped = 0;
1285                                 cy_writeb(base_addr + (CySRER << index),
1286                                         readb(base_addr + (CySRER << index)) |
1287                                                 CyTxRdy);
1288                                 tty_wakeup(info->tty);
1289                         }
1290                 } else {
1291                         if (!(mdm_status & CyCTS)) {
1292                                 /* cy_stop isn't used
1293                                    because ... !!! */
1294                                 info->tty->hw_stopped = 1;
1295                                 cy_writeb(base_addr + (CySRER << index),
1296                                         readb(base_addr + (CySRER << index)) &
1297                                                 ~CyTxRdy);
1298                         }
1299                 }
1300         }
1301 /*      if (mdm_change & CyDSR) {
1302         }
1303         if (mdm_change & CyRI) {
1304         }*/
1305 end:
1306         /* end of service */
1307         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1308         cy_writeb(base_addr + (CyCAR << index), save_car);
1309 }
1310
1311 /* The real interrupt service routine is called
1312    whenever the card wants its hand held--chars
1313    received, out buffer empty, modem change, etc.
1314  */
1315 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1316 {
1317         int status;
1318         struct cyclades_card *cinfo = dev_id;
1319         void __iomem *base_addr, *card_base_addr;
1320         unsigned int chip, too_many, had_work;
1321         int index;
1322
1323         if (unlikely(cinfo == NULL)) {
1324 #ifdef CY_DEBUG_INTERRUPTS
1325                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1326 #endif
1327                 return IRQ_NONE;        /* spurious interrupt */
1328         }
1329
1330         card_base_addr = cinfo->base_addr;
1331         index = cinfo->bus_index;
1332
1333         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1334         if (unlikely(card_base_addr == NULL))
1335                 return IRQ_HANDLED;
1336
1337         /* This loop checks all chips in the card.  Make a note whenever
1338            _any_ chip had some work to do, as this is considered an
1339            indication that there will be more to do.  Only when no chip
1340            has any work does this outermost loop exit.
1341          */
1342         do {
1343                 had_work = 0;
1344                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1345                         base_addr = cinfo->base_addr +
1346                                         (cy_chip_offset[chip] << index);
1347                         too_many = 0;
1348                         while ((status = readb(base_addr +
1349                                                 (CySVRR << index))) != 0x00) {
1350                                 had_work++;
1351                         /* The purpose of the following test is to ensure that
1352                            no chip can monopolize the driver.  This forces the
1353                            chips to be checked in a round-robin fashion (after
1354                            draining each of a bunch (1000) of characters).
1355                          */
1356                                 if (1000 < too_many++)
1357                                         break;
1358                                 spin_lock(&cinfo->card_lock);
1359                                 if (status & CySRReceive) /* rx intr */
1360                                         cyy_chip_rx(cinfo, chip, base_addr);
1361                                 if (status & CySRTransmit) /* tx intr */
1362                                         cyy_chip_tx(cinfo, chip, base_addr);
1363                                 if (status & CySRModem) /* modem intr */
1364                                         cyy_chip_modem(cinfo, chip, base_addr);
1365                                 spin_unlock(&cinfo->card_lock);
1366                         }
1367                 }
1368         } while (had_work);
1369
1370         /* clear interrupts */
1371         spin_lock(&cinfo->card_lock);
1372         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1373         /* Cy_ClrIntr is 0x1800 */
1374         spin_unlock(&cinfo->card_lock);
1375         return IRQ_HANDLED;
1376 }                               /* cyy_interrupt */
1377
1378 /***********************************************************/
1379 /********* End of block of Cyclom-Y specific code **********/
1380 /******** Start of block of Cyclades-Z specific code *********/
1381 /***********************************************************/
1382
1383 static int
1384 cyz_fetch_msg(struct cyclades_card *cinfo,
1385                 __u32 * channel, __u8 * cmd, __u32 * param)
1386 {
1387         struct FIRM_ID __iomem *firm_id;
1388         struct ZFW_CTRL __iomem *zfw_ctrl;
1389         struct BOARD_CTRL __iomem *board_ctrl;
1390         unsigned long loc_doorbell;
1391
1392         firm_id = cinfo->base_addr + ID_ADDRESS;
1393         if (!ISZLOADED(*cinfo)) {
1394                 return -1;
1395         }
1396         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1397         board_ctrl = &zfw_ctrl->board_ctrl;
1398
1399         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1400                                   (cinfo->ctl_addr))->loc_doorbell);
1401         if (loc_doorbell) {
1402                 *cmd = (char)(0xff & loc_doorbell);
1403                 *channel = readl(&board_ctrl->fwcmd_channel);
1404                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1405                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1406                           loc_doorbell, 0xffffffff);
1407                 return 1;
1408         }
1409         return 0;
1410 }                               /* cyz_fetch_msg */
1411
1412 static int
1413 cyz_issue_cmd(struct cyclades_card *cinfo,
1414                 __u32 channel, __u8 cmd, __u32 param)
1415 {
1416         struct FIRM_ID __iomem *firm_id;
1417         struct ZFW_CTRL __iomem *zfw_ctrl;
1418         struct BOARD_CTRL __iomem *board_ctrl;
1419         __u32 __iomem *pci_doorbell;
1420         unsigned int index;
1421
1422         firm_id = cinfo->base_addr + ID_ADDRESS;
1423         if (!ISZLOADED(*cinfo)) {
1424                 return -1;
1425         }
1426         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1427         board_ctrl = &zfw_ctrl->board_ctrl;
1428
1429         index = 0;
1430         pci_doorbell =
1431             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1432         while ((readl(pci_doorbell) & 0xff) != 0) {
1433                 if (index++ == 1000) {
1434                         return (int)(readl(pci_doorbell) & 0xff);
1435                 }
1436                 udelay(50L);
1437         }
1438         cy_writel(&board_ctrl->hcmd_channel, channel);
1439         cy_writel(&board_ctrl->hcmd_param, param);
1440         cy_writel(pci_doorbell, (long)cmd);
1441
1442         return 0;
1443 }                               /* cyz_issue_cmd */
1444
1445 static void cyz_handle_rx(struct cyclades_port *info,
1446                 struct BUF_CTRL __iomem *buf_ctrl)
1447 {
1448         struct cyclades_card *cinfo = info->card;
1449         struct tty_struct *tty = info->tty;
1450         unsigned int char_count;
1451         int len;
1452 #ifdef BLOCKMOVE
1453         unsigned char *buf;
1454 #else
1455         char data;
1456 #endif
1457         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1458
1459         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1460         rx_put = readl(&buf_ctrl->rx_put);
1461         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1462         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1463         if (rx_put >= rx_get)
1464                 char_count = rx_put - rx_get;
1465         else
1466                 char_count = rx_put - rx_get + rx_bufsize;
1467
1468         if (char_count) {
1469 #ifdef CY_ENABLE_MONITORING
1470                 info->mon.int_count++;
1471                 info->mon.char_count += char_count;
1472                 if (char_count > info->mon.char_max)
1473                         info->mon.char_max = char_count;
1474                 info->mon.char_last = char_count;
1475 #endif
1476                 if (tty == NULL) {
1477                         /* flush received characters */
1478                         new_rx_get = (new_rx_get + char_count) &
1479                                         (rx_bufsize - 1);
1480                         info->rflush_count++;
1481                 } else {
1482 #ifdef BLOCKMOVE
1483                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1484                    for performance, but because of buffer boundaries, there
1485                    may be several steps to the operation */
1486                         while (1) {
1487                                 len = tty_prepare_flip_string(tty, &buf,
1488                                                 char_count);
1489                                 if (!len)
1490                                         break;
1491
1492                                 len = min_t(unsigned int, min(len, char_count),
1493                                                 rx_bufsize - new_rx_get);
1494
1495                                 memcpy_fromio(buf, cinfo->base_addr +
1496                                                 rx_bufaddr + new_rx_get, len);
1497
1498                                 new_rx_get = (new_rx_get + len) &
1499                                                 (rx_bufsize - 1);
1500                                 char_count -= len;
1501                                 info->icount.rx += len;
1502                                 info->idle_stats.recv_bytes += len;
1503                         }
1504 #else
1505                         len = tty_buffer_request_room(tty, char_count);
1506                         while (len--) {
1507                                 data = readb(cinfo->base_addr + rx_bufaddr +
1508                                                 new_rx_get);
1509                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1510                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1511                                 info->idle_stats.recv_bytes++;
1512                                 info->icount.rx++;
1513                         }
1514 #endif
1515 #ifdef CONFIG_CYZ_INTR
1516                 /* Recalculate the number of chars in the RX buffer and issue
1517                    a cmd in case it's higher than the RX high water mark */
1518                         rx_put = readl(&buf_ctrl->rx_put);
1519                         if (rx_put >= rx_get)
1520                                 char_count = rx_put - rx_get;
1521                         else
1522                                 char_count = rx_put - rx_get + rx_bufsize;
1523                         if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1524                                         !timer_pending(&cyz_rx_full_timer[
1525                                                         info->line]))
1526                                 mod_timer(&cyz_rx_full_timer[info->line],
1527                                                 jiffies + 1);
1528 #endif
1529                         info->idle_stats.recv_idle = jiffies;
1530                         tty_schedule_flip(tty);
1531                 }
1532                 /* Update rx_get */
1533                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1534         }
1535 }
1536
1537 static void cyz_handle_tx(struct cyclades_port *info,
1538                 struct BUF_CTRL __iomem *buf_ctrl)
1539 {
1540         struct cyclades_card *cinfo = info->card;
1541         struct tty_struct *tty = info->tty;
1542         u8 data;
1543         unsigned int char_count;
1544 #ifdef BLOCKMOVE
1545         int small_count;
1546 #endif
1547         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1548
1549         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1550                 return;
1551
1552         tx_get = readl(&buf_ctrl->tx_get);
1553         tx_put = readl(&buf_ctrl->tx_put);
1554         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1555         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1556         if (tx_put >= tx_get)
1557                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1558         else
1559                 char_count = tx_get - tx_put - 1;
1560
1561         if (char_count) {
1562
1563                 if (tty == NULL)
1564                         goto ztxdone;
1565
1566                 if (info->x_char) {     /* send special char */
1567                         data = info->x_char;
1568
1569                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1570                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1571                         info->x_char = 0;
1572                         char_count--;
1573                         info->icount.tx++;
1574                 }
1575 #ifdef BLOCKMOVE
1576                 while (0 < (small_count = min_t(unsigned int,
1577                                 tx_bufsize - tx_put, min_t(unsigned int,
1578                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1579                                         min_t(unsigned int, info->xmit_cnt,
1580                                                 char_count))))) {
1581
1582                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1583                                         tx_put),
1584                                         &info->xmit_buf[info->xmit_tail],
1585                                         small_count);
1586
1587                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1588                         char_count -= small_count;
1589                         info->icount.tx += small_count;
1590                         info->xmit_cnt -= small_count;
1591                         info->xmit_tail = (info->xmit_tail + small_count) &
1592                                         (SERIAL_XMIT_SIZE - 1);
1593                 }
1594 #else
1595                 while (info->xmit_cnt && char_count) {
1596                         data = info->xmit_buf[info->xmit_tail];
1597                         info->xmit_cnt--;
1598                         info->xmit_tail = (info->xmit_tail + 1) &
1599                                         (SERIAL_XMIT_SIZE - 1);
1600
1601                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1602                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1603                         char_count--;
1604                         info->icount.tx++;
1605                 }
1606 #endif
1607 ztxdone:
1608                 tty_wakeup(tty);
1609                 /* Update tx_put */
1610                 cy_writel(&buf_ctrl->tx_put, tx_put);
1611         }
1612 }
1613
1614 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1615 {
1616         struct tty_struct *tty;
1617         struct cyclades_port *info;
1618         static struct FIRM_ID __iomem *firm_id;
1619         static struct ZFW_CTRL __iomem *zfw_ctrl;
1620         static struct BOARD_CTRL __iomem *board_ctrl;
1621         static struct CH_CTRL __iomem *ch_ctrl;
1622         static struct BUF_CTRL __iomem *buf_ctrl;
1623         __u32 channel;
1624         __u8 cmd;
1625         __u32 param;
1626         __u32 hw_ver, fw_ver;
1627         int special_count;
1628         int delta_count;
1629
1630         firm_id = cinfo->base_addr + ID_ADDRESS;
1631         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1632         board_ctrl = &zfw_ctrl->board_ctrl;
1633         fw_ver = readl(&board_ctrl->fw_version);
1634         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1635                         mail_box_0);
1636
1637         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1638                 special_count = 0;
1639                 delta_count = 0;
1640                 info = &cinfo->ports[channel];
1641                 if ((tty = info->tty) == NULL)
1642                         continue;
1643
1644                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1645                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1646
1647                 switch (cmd) {
1648                 case C_CM_PR_ERROR:
1649                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1650                         info->icount.rx++;
1651                         special_count++;
1652                         break;
1653                 case C_CM_FR_ERROR:
1654                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1655                         info->icount.rx++;
1656                         special_count++;
1657                         break;
1658                 case C_CM_RXBRK:
1659                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1660                         info->icount.rx++;
1661                         special_count++;
1662                         break;
1663                 case C_CM_MDCD:
1664                         info->icount.dcd++;
1665                         delta_count++;
1666                         if (info->flags & ASYNC_CHECK_CD) {
1667                                 if ((fw_ver > 241 ? ((u_long) param) :
1668                                                 readl(&ch_ctrl->rs_status)) &
1669                                                 C_RS_DCD) {
1670                                         wake_up_interruptible(&info->open_wait);
1671                                 } else {
1672                                         tty_hangup(info->tty);
1673                                         wake_up_interruptible(&info->open_wait);
1674                                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1675                                 }
1676                         }
1677                         break;
1678                 case C_CM_MCTS:
1679                         info->icount.cts++;
1680                         delta_count++;
1681                         break;
1682                 case C_CM_MRI:
1683                         info->icount.rng++;
1684                         delta_count++;
1685                         break;
1686                 case C_CM_MDSR:
1687                         info->icount.dsr++;
1688                         delta_count++;
1689                         break;
1690 #ifdef Z_WAKE
1691                 case C_CM_IOCTLW:
1692                         complete(&info->shutdown_wait);
1693                         break;
1694 #endif
1695 #ifdef CONFIG_CYZ_INTR
1696                 case C_CM_RXHIWM:
1697                 case C_CM_RXNNDT:
1698                 case C_CM_INTBACK2:
1699                         /* Reception Interrupt */
1700 #ifdef CY_DEBUG_INTERRUPTS
1701                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1702                                         "port %ld\n", info->card, channel);
1703 #endif
1704                         cyz_handle_rx(info, buf_ctrl);
1705                         break;
1706                 case C_CM_TXBEMPTY:
1707                 case C_CM_TXLOWWM:
1708                 case C_CM_INTBACK:
1709                         /* Transmission Interrupt */
1710 #ifdef CY_DEBUG_INTERRUPTS
1711                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1712                                         "port %ld\n", info->card, channel);
1713 #endif
1714                         cyz_handle_tx(info, buf_ctrl);
1715                         break;
1716 #endif                          /* CONFIG_CYZ_INTR */
1717                 case C_CM_FATAL:
1718                         /* should do something with this !!! */
1719                         break;
1720                 default:
1721                         break;
1722                 }
1723                 if (delta_count)
1724                         wake_up_interruptible(&info->delta_msr_wait);
1725                 if (special_count)
1726                         tty_schedule_flip(tty);
1727         }
1728 }
1729
1730 #ifdef CONFIG_CYZ_INTR
1731 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1732 {
1733         struct cyclades_card *cinfo = dev_id;
1734
1735         if (unlikely(cinfo == NULL)) {
1736 #ifdef CY_DEBUG_INTERRUPTS
1737                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1738 #endif
1739                 return IRQ_NONE;        /* spurious interrupt */
1740         }
1741
1742         if (unlikely(!ISZLOADED(*cinfo))) {
1743 #ifdef CY_DEBUG_INTERRUPTS
1744                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1745                                 "(IRQ%d).\n", irq);
1746 #endif
1747                 return IRQ_NONE;
1748         }
1749
1750         /* Handle the interrupts */
1751         cyz_handle_cmd(cinfo);
1752
1753         return IRQ_HANDLED;
1754 }                               /* cyz_interrupt */
1755
1756 static void cyz_rx_restart(unsigned long arg)
1757 {
1758         struct cyclades_port *info = (struct cyclades_port *)arg;
1759         struct cyclades_card *card = info->card;
1760         int retval;
1761         __u32 channel = info->line - card->first_line;
1762         unsigned long flags;
1763
1764         spin_lock_irqsave(&card->card_lock, flags);
1765         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1766         if (retval != 0) {
1767                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1768                         info->line, retval);
1769         }
1770         spin_unlock_irqrestore(&card->card_lock, flags);
1771 }
1772
1773 #else                           /* CONFIG_CYZ_INTR */
1774
1775 static void cyz_poll(unsigned long arg)
1776 {
1777         struct cyclades_card *cinfo;
1778         struct cyclades_port *info;
1779         struct tty_struct *tty;
1780         struct FIRM_ID __iomem *firm_id;
1781         struct ZFW_CTRL __iomem *zfw_ctrl;
1782         struct BOARD_CTRL __iomem *board_ctrl;
1783         struct BUF_CTRL __iomem *buf_ctrl;
1784         unsigned long expires = jiffies + HZ;
1785         unsigned int port, card;
1786
1787         for (card = 0; card < NR_CARDS; card++) {
1788                 cinfo = &cy_card[card];
1789
1790                 if (!IS_CYC_Z(*cinfo))
1791                         continue;
1792                 if (!ISZLOADED(*cinfo))
1793                         continue;
1794
1795                 firm_id = cinfo->base_addr + ID_ADDRESS;
1796                 zfw_ctrl = cinfo->base_addr +
1797                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1798                 board_ctrl = &(zfw_ctrl->board_ctrl);
1799
1800         /* Skip first polling cycle to avoid racing conditions with the FW */
1801                 if (!cinfo->intr_enabled) {
1802                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1803                         cinfo->intr_enabled = 1;
1804                         continue;
1805                 }
1806
1807                 cyz_handle_cmd(cinfo);
1808
1809                 for (port = 0; port < cinfo->nports; port++) {
1810                         info = &cinfo->ports[port];
1811                         tty = info->tty;
1812                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1813
1814                         if (!info->throttle)
1815                                 cyz_handle_rx(info, buf_ctrl);
1816                         cyz_handle_tx(info, buf_ctrl);
1817                 }
1818                 /* poll every 'cyz_polling_cycle' period */
1819                 expires = jiffies + cyz_polling_cycle;
1820         }
1821         mod_timer(&cyz_timerlist, expires);
1822 }                               /* cyz_poll */
1823
1824 #endif                          /* CONFIG_CYZ_INTR */
1825
1826 /********** End of block of Cyclades-Z specific code *********/
1827 /***********************************************************/
1828
1829 /* This is called whenever a port becomes active;
1830    interrupts are enabled and DTR & RTS are turned on.
1831  */
1832 static int startup(struct cyclades_port *info)
1833 {
1834         struct cyclades_card *card;
1835         unsigned long flags;
1836         int retval = 0;
1837         void __iomem *base_addr;
1838         int chip, channel, index;
1839         unsigned long page;
1840
1841         card = info->card;
1842         channel = info->line - card->first_line;
1843
1844         page = get_zeroed_page(GFP_KERNEL);
1845         if (!page)
1846                 return -ENOMEM;
1847
1848         spin_lock_irqsave(&card->card_lock, flags);
1849
1850         if (info->flags & ASYNC_INITIALIZED) {
1851                 free_page(page);
1852                 goto errout;
1853         }
1854
1855         if (!info->type) {
1856                 if (info->tty) {
1857                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1858                 }
1859                 free_page(page);
1860                 goto errout;
1861         }
1862
1863         if (info->xmit_buf)
1864                 free_page(page);
1865         else
1866                 info->xmit_buf = (unsigned char *)page;
1867
1868         spin_unlock_irqrestore(&card->card_lock, flags);
1869
1870         set_line_char(info);
1871
1872         if (!IS_CYC_Z(*card)) {
1873                 chip = channel >> 2;
1874                 channel &= 0x03;
1875                 index = card->bus_index;
1876                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1877
1878 #ifdef CY_DEBUG_OPEN
1879                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1880                                 "base_addr %p\n",
1881                                 card, chip, channel, base_addr);
1882 #endif
1883                 spin_lock_irqsave(&card->card_lock, flags);
1884
1885                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1886
1887                 cy_writeb(base_addr + (CyRTPR << index),
1888                         (info->default_timeout ? info->default_timeout : 0x02));
1889                 /* 10ms rx timeout */
1890
1891                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1892                                 index);
1893
1894                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1895                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1896                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1897
1898 #ifdef CY_DEBUG_DTR
1899                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1900                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1901                         readb(base_addr + (CyMSVR1 << index)),
1902                         readb(base_addr + (CyMSVR2 << index)));
1903 #endif
1904
1905                 cy_writeb(base_addr + (CySRER << index),
1906                         readb(base_addr + (CySRER << index)) | CyRxData);
1907                 info->flags |= ASYNC_INITIALIZED;
1908
1909                 if (info->tty) {
1910                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
1911                 }
1912                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1913                 info->breakon = info->breakoff = 0;
1914                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1915                 info->idle_stats.in_use =
1916                 info->idle_stats.recv_idle =
1917                 info->idle_stats.xmit_idle = jiffies;
1918
1919                 spin_unlock_irqrestore(&card->card_lock, flags);
1920
1921         } else {
1922                 struct FIRM_ID __iomem *firm_id;
1923                 struct ZFW_CTRL __iomem *zfw_ctrl;
1924                 struct BOARD_CTRL __iomem *board_ctrl;
1925                 struct CH_CTRL __iomem *ch_ctrl;
1926
1927                 base_addr = card->base_addr;
1928
1929                 firm_id = base_addr + ID_ADDRESS;
1930                 if (!ISZLOADED(*card)) {
1931                         return -ENODEV;
1932                 }
1933
1934                 zfw_ctrl = card->base_addr +
1935                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1936                 board_ctrl = &zfw_ctrl->board_ctrl;
1937                 ch_ctrl = zfw_ctrl->ch_ctrl;
1938
1939 #ifdef CY_DEBUG_OPEN
1940                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1941                         "base_addr %p\n", card, channel, base_addr);
1942 #endif
1943                 spin_lock_irqsave(&card->card_lock, flags);
1944
1945                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1946 #ifdef Z_WAKE
1947 #ifdef CONFIG_CYZ_INTR
1948                 cy_writel(&ch_ctrl[channel].intr_enable,
1949                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1950                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1951 #else
1952                 cy_writel(&ch_ctrl[channel].intr_enable,
1953                           C_IN_IOCTLW | C_IN_MDCD);
1954 #endif                          /* CONFIG_CYZ_INTR */
1955 #else
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_MDCD);
1960 #else
1961                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1962 #endif                          /* CONFIG_CYZ_INTR */
1963 #endif                          /* Z_WAKE */
1964
1965                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1966                 if (retval != 0) {
1967                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1968                                 "%x\n", info->line, retval);
1969                 }
1970
1971                 /* Flush RX buffers before raising DTR and RTS */
1972                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1973                 if (retval != 0) {
1974                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1975                                 "%x\n", info->line, retval);
1976                 }
1977
1978                 /* set timeout !!! */
1979                 /* set RTS and DTR !!! */
1980                 cy_writel(&ch_ctrl[channel].rs_control,
1981                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1982                         C_RS_DTR);
1983                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1984                 if (retval != 0) {
1985                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1986                                 "%x\n", info->line, retval);
1987                 }
1988 #ifdef CY_DEBUG_DTR
1989                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1990 #endif
1991
1992                 /* enable send, recv, modem !!! */
1993
1994                 info->flags |= ASYNC_INITIALIZED;
1995                 if (info->tty) {
1996                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
1997                 }
1998                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1999                 info->breakon = info->breakoff = 0;
2000                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2001                 info->idle_stats.in_use =
2002                 info->idle_stats.recv_idle =
2003                 info->idle_stats.xmit_idle = jiffies;
2004
2005                 spin_unlock_irqrestore(&card->card_lock, flags);
2006         }
2007
2008 #ifdef CY_DEBUG_OPEN
2009         printk(KERN_DEBUG "cyc startup done\n");
2010 #endif
2011         return 0;
2012
2013 errout:
2014         spin_unlock_irqrestore(&card->card_lock, flags);
2015         return retval;
2016 }                               /* startup */
2017
2018 static void start_xmit(struct cyclades_port *info)
2019 {
2020         struct cyclades_card *card;
2021         unsigned long flags;
2022         void __iomem *base_addr;
2023         int chip, channel, index;
2024
2025         card = info->card;
2026         channel = info->line - card->first_line;
2027         if (!IS_CYC_Z(*card)) {
2028                 chip = channel >> 2;
2029                 channel &= 0x03;
2030                 index = card->bus_index;
2031                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2032
2033                 spin_lock_irqsave(&card->card_lock, flags);
2034                 cy_writeb(base_addr + (CyCAR << index), channel);
2035                 cy_writeb(base_addr + (CySRER << index),
2036                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2037                 spin_unlock_irqrestore(&card->card_lock, flags);
2038         } else {
2039 #ifdef CONFIG_CYZ_INTR
2040                 int retval;
2041
2042                 spin_lock_irqsave(&card->card_lock, flags);
2043                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2044                 if (retval != 0) {
2045                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2046                                 "%x\n", info->line, retval);
2047                 }
2048                 spin_unlock_irqrestore(&card->card_lock, flags);
2049 #else                           /* CONFIG_CYZ_INTR */
2050                 /* Don't have to do anything at this time */
2051 #endif                          /* CONFIG_CYZ_INTR */
2052         }
2053 }                               /* start_xmit */
2054
2055 /*
2056  * This routine shuts down a serial port; interrupts are disabled,
2057  * and DTR is dropped if the hangup on close termio flag is on.
2058  */
2059 static void shutdown(struct cyclades_port *info)
2060 {
2061         struct cyclades_card *card;
2062         unsigned long flags;
2063         void __iomem *base_addr;
2064         int chip, channel, index;
2065
2066         if (!(info->flags & ASYNC_INITIALIZED)) {
2067                 return;
2068         }
2069
2070         card = info->card;
2071         channel = info->line - card->first_line;
2072         if (!IS_CYC_Z(*card)) {
2073                 chip = channel >> 2;
2074                 channel &= 0x03;
2075                 index = card->bus_index;
2076                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2077
2078 #ifdef CY_DEBUG_OPEN
2079                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2080                                 "channel %d, base_addr %p\n",
2081                                 card, chip, channel, base_addr);
2082 #endif
2083
2084                 spin_lock_irqsave(&card->card_lock, flags);
2085
2086                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2087                 wake_up_interruptible(&info->delta_msr_wait);
2088
2089                 if (info->xmit_buf) {
2090                         unsigned char *temp;
2091                         temp = info->xmit_buf;
2092                         info->xmit_buf = NULL;
2093                         free_page((unsigned long)temp);
2094                 }
2095                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2096                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2097                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2098                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2099 #ifdef CY_DEBUG_DTR
2100                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2101                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2102                                 readb(base_addr + (CyMSVR1 << index)),
2103                                 readb(base_addr + (CyMSVR2 << index)));
2104 #endif
2105                 }
2106                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2107                 /* it may be appropriate to clear _XMIT at
2108                    some later date (after testing)!!! */
2109
2110                 if (info->tty) {
2111                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2112                 }
2113                 info->flags &= ~ASYNC_INITIALIZED;
2114                 spin_unlock_irqrestore(&card->card_lock, flags);
2115         } else {
2116                 struct FIRM_ID __iomem *firm_id;
2117                 struct ZFW_CTRL __iomem *zfw_ctrl;
2118                 struct BOARD_CTRL __iomem *board_ctrl;
2119                 struct CH_CTRL __iomem *ch_ctrl;
2120                 int retval;
2121
2122                 base_addr = card->base_addr;
2123 #ifdef CY_DEBUG_OPEN
2124                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2125                         "base_addr %p\n", card, channel, base_addr);
2126 #endif
2127
2128                 firm_id = base_addr + ID_ADDRESS;
2129                 if (!ISZLOADED(*card)) {
2130                         return;
2131                 }
2132
2133                 zfw_ctrl = card->base_addr +
2134                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2135                 board_ctrl = &zfw_ctrl->board_ctrl;
2136                 ch_ctrl = zfw_ctrl->ch_ctrl;
2137
2138                 spin_lock_irqsave(&card->card_lock, flags);
2139
2140                 if (info->xmit_buf) {
2141                         unsigned char *temp;
2142                         temp = info->xmit_buf;
2143                         info->xmit_buf = NULL;
2144                         free_page((unsigned long)temp);
2145                 }
2146
2147                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2148                         cy_writel(&ch_ctrl[channel].rs_control,
2149                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2150                                         ~(C_RS_RTS | C_RS_DTR)));
2151                         retval = cyz_issue_cmd(info->card, channel,
2152                                         C_CM_IOCTLM, 0L);
2153                         if (retval != 0) {
2154                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2155                                         "was %x\n", info->line, retval);
2156                         }
2157 #ifdef CY_DEBUG_DTR
2158                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2159 #endif
2160                 }
2161
2162                 if (info->tty) {
2163                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2164                 }
2165                 info->flags &= ~ASYNC_INITIALIZED;
2166
2167                 spin_unlock_irqrestore(&card->card_lock, flags);
2168         }
2169
2170 #ifdef CY_DEBUG_OPEN
2171         printk(KERN_DEBUG "cyc shutdown done\n");
2172 #endif
2173 }                               /* shutdown */
2174
2175 /*
2176  * ------------------------------------------------------------
2177  * cy_open() and friends
2178  * ------------------------------------------------------------
2179  */
2180
2181 static int
2182 block_til_ready(struct tty_struct *tty, struct file *filp,
2183                 struct cyclades_port *info)
2184 {
2185         DECLARE_WAITQUEUE(wait, current);
2186         struct cyclades_card *cinfo;
2187         unsigned long flags;
2188         int chip, channel, index;
2189         int retval;
2190         void __iomem *base_addr;
2191
2192         cinfo = info->card;
2193         channel = info->line - cinfo->first_line;
2194
2195         /*
2196          * If the device is in the middle of being closed, then block
2197          * until it's done, and then try again.
2198          */
2199         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2200                 wait_event_interruptible(info->close_wait,
2201                                 !(info->flags & ASYNC_CLOSING));
2202                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2203         }
2204
2205         /*
2206          * If non-blocking mode is set, then make the check up front
2207          * and then exit.
2208          */
2209         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2210                 info->flags |= ASYNC_NORMAL_ACTIVE;
2211                 return 0;
2212         }
2213
2214         /*
2215          * Block waiting for the carrier detect and the line to become
2216          * free (i.e., not in use by the callout).  While we are in
2217          * this loop, info->count is dropped by one, so that
2218          * cy_close() knows when to free things.  We restore it upon
2219          * exit, either normal or abnormal.
2220          */
2221         retval = 0;
2222         add_wait_queue(&info->open_wait, &wait);
2223 #ifdef CY_DEBUG_OPEN
2224         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2225                 "count = %d\n", info->line, info->count);
2226 #endif
2227         spin_lock_irqsave(&cinfo->card_lock, flags);
2228         if (!tty_hung_up_p(filp))
2229                 info->count--;
2230         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2231 #ifdef CY_DEBUG_COUNT
2232         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2233                 "%d\n", current->pid, info->count);
2234 #endif
2235         info->blocked_open++;
2236
2237         if (!IS_CYC_Z(*cinfo)) {
2238                 chip = channel >> 2;
2239                 channel &= 0x03;
2240                 index = cinfo->bus_index;
2241                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2242
2243                 while (1) {
2244                         spin_lock_irqsave(&cinfo->card_lock, flags);
2245                         if ((tty->termios->c_cflag & CBAUD)) {
2246                                 cy_writeb(base_addr + (CyCAR << index),
2247                                           (u_char) channel);
2248                                 cy_writeb(base_addr + (CyMSVR1 << index),
2249                                           CyRTS);
2250                                 cy_writeb(base_addr + (CyMSVR2 << index),
2251                                           CyDTR);
2252 #ifdef CY_DEBUG_DTR
2253                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2254                                         "DTR\n");
2255                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2256                                         readb(base_addr + (CyMSVR1 << index)),
2257                                         readb(base_addr + (CyMSVR2 << index)));
2258 #endif
2259                         }
2260                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2261
2262                         set_current_state(TASK_INTERRUPTIBLE);
2263                         if (tty_hung_up_p(filp) ||
2264                                         !(info->flags & ASYNC_INITIALIZED)) {
2265                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2266                                           -EAGAIN : -ERESTARTSYS);
2267                                 break;
2268                         }
2269
2270                         spin_lock_irqsave(&cinfo->card_lock, flags);
2271                         cy_writeb(base_addr + (CyCAR << index),
2272                                   (u_char) channel);
2273                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2274                                         (readb(base_addr +
2275                                                 (CyMSVR1 << index)) & CyDCD))) {
2276                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2277                                 break;
2278                         }
2279                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2280
2281                         if (signal_pending(current)) {
2282                                 retval = -ERESTARTSYS;
2283                                 break;
2284                         }
2285 #ifdef CY_DEBUG_OPEN
2286                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2287                                 "ttyC%d, count = %d\n",
2288                                 info->line, info->count);
2289 #endif
2290                         schedule();
2291                 }
2292         } else {
2293                 struct FIRM_ID __iomem *firm_id;
2294                 struct ZFW_CTRL __iomem *zfw_ctrl;
2295                 struct BOARD_CTRL __iomem *board_ctrl;
2296                 struct CH_CTRL __iomem *ch_ctrl;
2297
2298                 base_addr = cinfo->base_addr;
2299                 firm_id = base_addr + ID_ADDRESS;
2300                 if (!ISZLOADED(*cinfo)) {
2301                         __set_current_state(TASK_RUNNING);
2302                         remove_wait_queue(&info->open_wait, &wait);
2303                         return -EINVAL;
2304                 }
2305
2306                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2307                 board_ctrl = &zfw_ctrl->board_ctrl;
2308                 ch_ctrl = zfw_ctrl->ch_ctrl;
2309
2310                 while (1) {
2311                         if ((tty->termios->c_cflag & CBAUD)) {
2312                                 cy_writel(&ch_ctrl[channel].rs_control,
2313                                         readl(&ch_ctrl[channel].rs_control) |
2314                                         C_RS_RTS | C_RS_DTR);
2315                                 retval = cyz_issue_cmd(cinfo,
2316                                         channel, C_CM_IOCTLM, 0L);
2317                                 if (retval != 0) {
2318                                         printk(KERN_ERR "cyc:block_til_ready "
2319                                                 "retval on ttyC%d was %x\n",
2320                                                 info->line, retval);
2321                                 }
2322 #ifdef CY_DEBUG_DTR
2323                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2324                                         "Z DTR\n");
2325 #endif
2326                         }
2327
2328                         set_current_state(TASK_INTERRUPTIBLE);
2329                         if (tty_hung_up_p(filp) ||
2330                                         !(info->flags & ASYNC_INITIALIZED)) {
2331                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2332                                           -EAGAIN : -ERESTARTSYS);
2333                                 break;
2334                         }
2335                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2336                                         (readl(&ch_ctrl[channel].rs_status) &
2337                                                 C_RS_DCD))) {
2338                                 break;
2339                         }
2340                         if (signal_pending(current)) {
2341                                 retval = -ERESTARTSYS;
2342                                 break;
2343                         }
2344 #ifdef CY_DEBUG_OPEN
2345                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2346                                 "ttyC%d, count = %d\n",
2347                                 info->line, info->count);
2348 #endif
2349                         schedule();
2350                 }
2351         }
2352         __set_current_state(TASK_RUNNING);
2353         remove_wait_queue(&info->open_wait, &wait);
2354         if (!tty_hung_up_p(filp)) {
2355                 info->count++;
2356 #ifdef CY_DEBUG_COUNT
2357                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2358                         "count to %d\n", current->pid, info->count);
2359 #endif
2360         }
2361         info->blocked_open--;
2362 #ifdef CY_DEBUG_OPEN
2363         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2364                 "count = %d\n", info->line, info->count);
2365 #endif
2366         if (retval)
2367                 return retval;
2368         info->flags |= ASYNC_NORMAL_ACTIVE;
2369         return 0;
2370 }                               /* block_til_ready */
2371
2372 /*
2373  * This routine is called whenever a serial port is opened.  It
2374  * performs the serial-specific initialization for the tty structure.
2375  */
2376 static int cy_open(struct tty_struct *tty, struct file *filp)
2377 {
2378         struct cyclades_port *info;
2379         unsigned int i, line;
2380         int retval;
2381
2382         line = tty->index;
2383         if ((tty->index < 0) || (NR_PORTS <= line)) {
2384                 return -ENODEV;
2385         }
2386         for (i = 0; i < NR_CARDS; i++)
2387                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2388                                 line >= cy_card[i].first_line)
2389                         break;
2390         if (i >= NR_CARDS)
2391                 return -ENODEV;
2392         info = &cy_card[i].ports[line - cy_card[i].first_line];
2393         if (info->line < 0) {
2394                 return -ENODEV;
2395         }
2396
2397         /* If the card's firmware hasn't been loaded,
2398            treat it as absent from the system.  This
2399            will make the user pay attention.
2400          */
2401         if (IS_CYC_Z(*info->card)) {
2402                 struct cyclades_card *cinfo = info->card;
2403                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2404
2405                 if (!ISZLOADED(*cinfo)) {
2406                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2407                                          (cinfo->ctl_addr))->mail_box_0)) &&
2408                                         Z_FPGA_CHECK(*cinfo)) &&
2409                                         (ZFIRM_HLT == readl(
2410                                                 &firm_id->signature))) {
2411                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2412                                         "need an external power supply for "
2413                                         "this number of ports.\nFirmware "
2414                                         "halted.\n");
2415                         } else {
2416                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2417                                         "yet loaded\n");
2418                         }
2419                         return -ENODEV;
2420                 }
2421 #ifdef CONFIG_CYZ_INTR
2422                 else {
2423                 /* In case this Z board is operating in interrupt mode, its
2424                    interrupts should be enabled as soon as the first open
2425                    happens to one of its ports. */
2426                         if (!cinfo->intr_enabled) {
2427                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2428                                 struct BOARD_CTRL __iomem *board_ctrl;
2429
2430                                 zfw_ctrl = cinfo->base_addr +
2431                                         (readl(&firm_id->zfwctrl_addr) &
2432                                          0xfffff);
2433
2434                                 board_ctrl = &zfw_ctrl->board_ctrl;
2435
2436                                 /* Enable interrupts on the PLX chip */
2437                                 cy_writew(cinfo->ctl_addr + 0x68,
2438                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2439                                 /* Enable interrupts on the FW */
2440                                 retval = cyz_issue_cmd(cinfo, 0,
2441                                                 C_CM_IRQ_ENBL, 0L);
2442                                 if (retval != 0) {
2443                                         printk(KERN_ERR "cyc:IRQ enable retval "
2444                                                 "was %x\n", retval);
2445                                 }
2446                                 cinfo->nports =
2447                                         (int)readl(&board_ctrl->n_channel);
2448                                 cinfo->intr_enabled = 1;
2449                         }
2450                 }
2451 #endif                          /* CONFIG_CYZ_INTR */
2452                 /* Make sure this Z port really exists in hardware */
2453                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2454                         return -ENODEV;
2455         }
2456 #ifdef CY_DEBUG_OTHER
2457         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2458 #endif
2459         tty->driver_data = info;
2460         info->tty = tty;
2461         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2462                 return -ENODEV;
2463         }
2464 #ifdef CY_DEBUG_OPEN
2465         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2466                         info->count);
2467 #endif
2468         info->count++;
2469 #ifdef CY_DEBUG_COUNT
2470         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2471                 current->pid, info->count);
2472 #endif
2473
2474         /*
2475          * If the port is the middle of closing, bail out now
2476          */
2477         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2478                 wait_event_interruptible(info->close_wait,
2479                                 !(info->flags & ASYNC_CLOSING));
2480                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2481         }
2482
2483         /*
2484          * Start up serial port
2485          */
2486         retval = startup(info);
2487         if (retval) {
2488                 return retval;
2489         }
2490
2491         retval = block_til_ready(tty, filp, info);
2492         if (retval) {
2493 #ifdef CY_DEBUG_OPEN
2494                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2495                         "with %d\n", retval);
2496 #endif
2497                 return retval;
2498         }
2499
2500         info->throttle = 0;
2501
2502 #ifdef CY_DEBUG_OPEN
2503         printk(KERN_DEBUG "cyc:cy_open done\n");
2504 #endif
2505         return 0;
2506 }                               /* cy_open */
2507
2508 /*
2509  * cy_wait_until_sent() --- wait until the transmitter is empty
2510  */
2511 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2512 {
2513         struct cyclades_card *card;
2514         struct cyclades_port *info = tty->driver_data;
2515         void __iomem *base_addr;
2516         int chip, channel, index;
2517         unsigned long orig_jiffies;
2518         int char_time;
2519
2520         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2521                 return;
2522
2523         if (info->xmit_fifo_size == 0)
2524                 return;         /* Just in case.... */
2525
2526         orig_jiffies = jiffies;
2527         /*
2528          * Set the check interval to be 1/5 of the estimated time to
2529          * send a single character, and make it at least 1.  The check
2530          * interval should also be less than the timeout.
2531          *
2532          * Note: we have to use pretty tight timings here to satisfy
2533          * the NIST-PCTS.
2534          */
2535         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2536         char_time = char_time / 5;
2537         if (char_time <= 0)
2538                 char_time = 1;
2539         if (timeout < 0)
2540                 timeout = 0;
2541         if (timeout)
2542                 char_time = min(char_time, timeout);
2543         /*
2544          * If the transmitter hasn't cleared in twice the approximate
2545          * amount of time to send the entire FIFO, it probably won't
2546          * ever clear.  This assumes the UART isn't doing flow
2547          * control, which is currently the case.  Hence, if it ever
2548          * takes longer than info->timeout, this is probably due to a
2549          * UART bug of some kind.  So, we clamp the timeout parameter at
2550          * 2*info->timeout.
2551          */
2552         if (!timeout || timeout > 2 * info->timeout)
2553                 timeout = 2 * info->timeout;
2554 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2555         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2556                 timeout, char_time, jiffies);
2557 #endif
2558         card = info->card;
2559         channel = (info->line) - (card->first_line);
2560         if (!IS_CYC_Z(*card)) {
2561                 chip = channel >> 2;
2562                 channel &= 0x03;
2563                 index = card->bus_index;
2564                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2565                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2566 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2567                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2568 #endif
2569                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2570                                 break;
2571                         if (timeout && time_after(jiffies, orig_jiffies +
2572                                         timeout))
2573                                 break;
2574                 }
2575         }
2576         /* Run one more char cycle */
2577         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2578 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2579         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2580 #endif
2581 }
2582
2583 /*
2584  * This routine is called when a particular tty device is closed.
2585  */
2586 static void cy_close(struct tty_struct *tty, struct file *filp)
2587 {
2588         struct cyclades_port *info = tty->driver_data;
2589         struct cyclades_card *card;
2590         unsigned long flags;
2591
2592 #ifdef CY_DEBUG_OTHER
2593         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2594 #endif
2595
2596         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2597                 return;
2598         }
2599
2600         card = info->card;
2601
2602         spin_lock_irqsave(&card->card_lock, flags);
2603         /* If the TTY is being hung up, nothing to do */
2604         if (tty_hung_up_p(filp)) {
2605                 spin_unlock_irqrestore(&card->card_lock, flags);
2606                 return;
2607         }
2608 #ifdef CY_DEBUG_OPEN
2609         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2610                 info->count);
2611 #endif
2612         if ((tty->count == 1) && (info->count != 1)) {
2613                 /*
2614                  * Uh, oh.  tty->count is 1, which means that the tty
2615                  * structure will be freed.  Info->count should always
2616                  * be one in these conditions.  If it's greater than
2617                  * one, we've got real problems, since it means the
2618                  * serial port won't be shutdown.
2619                  */
2620                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2621                         "tty->count is 1, info->count is %d\n", info->count);
2622                 info->count = 1;
2623         }
2624 #ifdef CY_DEBUG_COUNT
2625         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2626                 current->pid, info->count - 1);
2627 #endif
2628         if (--info->count < 0) {
2629 #ifdef CY_DEBUG_COUNT
2630                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2631 #endif
2632                 info->count = 0;
2633         }
2634         if (info->count) {
2635                 spin_unlock_irqrestore(&card->card_lock, flags);
2636                 return;
2637         }
2638         info->flags |= ASYNC_CLOSING;
2639
2640         /*
2641          * Now we wait for the transmit buffer to clear; and we notify
2642          * the line discipline to only process XON/XOFF characters.
2643          */
2644         tty->closing = 1;
2645         spin_unlock_irqrestore(&card->card_lock, flags);
2646         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2647                 tty_wait_until_sent(tty, info->closing_wait);
2648         }
2649         spin_lock_irqsave(&card->card_lock, flags);
2650
2651         if (!IS_CYC_Z(*card)) {
2652                 int channel = info->line - card->first_line;
2653                 int index = card->bus_index;
2654                 void __iomem *base_addr = card->base_addr +
2655                         (cy_chip_offset[channel >> 2] << index);
2656                 /* Stop accepting input */
2657                 channel &= 0x03;
2658                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2659                 cy_writeb(base_addr + (CySRER << index),
2660                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2661                 if (info->flags & ASYNC_INITIALIZED) {
2662                         /* Waiting for on-board buffers to be empty before closing
2663                            the port */
2664                         spin_unlock_irqrestore(&card->card_lock, flags);
2665                         cy_wait_until_sent(tty, info->timeout);
2666                         spin_lock_irqsave(&card->card_lock, flags);
2667                 }
2668         } else {
2669 #ifdef Z_WAKE
2670                 /* Waiting for on-board buffers to be empty before closing the port */
2671                 void __iomem *base_addr = card->base_addr;
2672                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2673                 struct ZFW_CTRL __iomem *zfw_ctrl =
2674                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2675                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2676                 int channel = info->line - card->first_line;
2677                 int retval;
2678
2679                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2680                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2681                         if (retval != 0) {
2682                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2683                                         "ttyC%d was %x\n", info->line, retval);
2684                         }
2685                         spin_unlock_irqrestore(&card->card_lock, flags);
2686                         wait_for_completion_interruptible(&info->shutdown_wait);
2687                         spin_lock_irqsave(&card->card_lock, flags);
2688                 }
2689 #endif
2690         }
2691
2692         spin_unlock_irqrestore(&card->card_lock, flags);
2693         shutdown(info);
2694         if (tty->driver->flush_buffer)
2695                 tty->driver->flush_buffer(tty);
2696         tty_ldisc_flush(tty);
2697         spin_lock_irqsave(&card->card_lock, flags);
2698
2699         tty->closing = 0;
2700         info->tty = NULL;
2701         if (info->blocked_open) {
2702                 spin_unlock_irqrestore(&card->card_lock, flags);
2703                 if (info->close_delay) {
2704                         msleep_interruptible(jiffies_to_msecs
2705                                                 (info->close_delay));
2706                 }
2707                 wake_up_interruptible(&info->open_wait);
2708                 spin_lock_irqsave(&card->card_lock, flags);
2709         }
2710         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2711         wake_up_interruptible(&info->close_wait);
2712
2713 #ifdef CY_DEBUG_OTHER
2714         printk(KERN_DEBUG "cyc:cy_close done\n");
2715 #endif
2716
2717         spin_unlock_irqrestore(&card->card_lock, flags);
2718 }                               /* cy_close */
2719
2720 /* This routine gets called when tty_write has put something into
2721  * the write_queue.  The characters may come from user space or
2722  * kernel space.
2723  *
2724  * This routine will return the number of characters actually
2725  * accepted for writing.
2726  *
2727  * If the port is not already transmitting stuff, start it off by
2728  * enabling interrupts.  The interrupt service routine will then
2729  * ensure that the characters are sent.
2730  * If the port is already active, there is no need to kick it.
2731  *
2732  */
2733 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2734 {
2735         struct cyclades_port *info = tty->driver_data;
2736         unsigned long flags;
2737         int c, ret = 0;
2738
2739 #ifdef CY_DEBUG_IO
2740         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2741 #endif
2742
2743         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2744                 return 0;
2745         }
2746
2747         if (!info->xmit_buf)
2748                 return 0;
2749
2750         spin_lock_irqsave(&info->card->card_lock, flags);
2751         while (1) {
2752                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2753                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2754
2755                 if (c <= 0)
2756                         break;
2757
2758                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2759                 info->xmit_head = (info->xmit_head + c) &
2760                         (SERIAL_XMIT_SIZE - 1);
2761                 info->xmit_cnt += c;
2762                 buf += c;
2763                 count -= c;
2764                 ret += c;
2765         }
2766         spin_unlock_irqrestore(&info->card->card_lock, flags);
2767
2768         info->idle_stats.xmit_bytes += ret;
2769         info->idle_stats.xmit_idle = jiffies;
2770
2771         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2772                 start_xmit(info);
2773         }
2774         return ret;
2775 }                               /* cy_write */
2776
2777 /*
2778  * This routine is called by the kernel to write a single
2779  * character to the tty device.  If the kernel uses this routine,
2780  * it must call the flush_chars() routine (if defined) when it is
2781  * done stuffing characters into the driver.  If there is no room
2782  * in the queue, the character is ignored.
2783  */
2784 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2785 {
2786         struct cyclades_port *info = tty->driver_data;
2787         unsigned long flags;
2788
2789 #ifdef CY_DEBUG_IO
2790         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2791 #endif
2792
2793         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2794                 return;
2795
2796         if (!info->xmit_buf)
2797                 return;
2798
2799         spin_lock_irqsave(&info->card->card_lock, flags);
2800         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2801                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2802                 return;
2803         }
2804
2805         info->xmit_buf[info->xmit_head++] = ch;
2806         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2807         info->xmit_cnt++;
2808         info->idle_stats.xmit_bytes++;
2809         info->idle_stats.xmit_idle = jiffies;
2810         spin_unlock_irqrestore(&info->card->card_lock, flags);
2811 }                               /* cy_put_char */
2812
2813 /*
2814  * This routine is called by the kernel after it has written a
2815  * series of characters to the tty device using put_char().
2816  */
2817 static void cy_flush_chars(struct tty_struct *tty)
2818 {
2819         struct cyclades_port *info = tty->driver_data;
2820
2821 #ifdef CY_DEBUG_IO
2822         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2823 #endif
2824
2825         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2826                 return;
2827
2828         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2829                         !info->xmit_buf)
2830                 return;
2831
2832         start_xmit(info);
2833 }                               /* cy_flush_chars */
2834
2835 /*
2836  * This routine returns the numbers of characters the tty driver
2837  * will accept for queuing to be written.  This number is subject
2838  * to change as output buffers get emptied, or if the output flow
2839  * control is activated.
2840  */
2841 static int cy_write_room(struct tty_struct *tty)
2842 {
2843         struct cyclades_port *info = tty->driver_data;
2844         int ret;
2845
2846 #ifdef CY_DEBUG_IO
2847         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2848 #endif
2849
2850         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2851                 return 0;
2852         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2853         if (ret < 0)
2854                 ret = 0;
2855         return ret;
2856 }                               /* cy_write_room */
2857
2858 static int cy_chars_in_buffer(struct tty_struct *tty)
2859 {
2860         struct cyclades_card *card;
2861         struct cyclades_port *info = tty->driver_data;
2862         int channel;
2863
2864         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2865                 return 0;
2866
2867         card = info->card;
2868         channel = (info->line) - (card->first_line);
2869
2870 #ifdef Z_EXT_CHARS_IN_BUFFER
2871         if (!IS_CYC_Z(cy_card[card])) {
2872 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2873 #ifdef CY_DEBUG_IO
2874                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2875                         info->line, info->xmit_cnt);
2876 #endif
2877                 return info->xmit_cnt;
2878 #ifdef Z_EXT_CHARS_IN_BUFFER
2879         } else {
2880                 static struct FIRM_ID *firm_id;
2881                 static struct ZFW_CTRL *zfw_ctrl;
2882                 static struct CH_CTRL *ch_ctrl;
2883                 static struct BUF_CTRL *buf_ctrl;
2884                 int char_count;
2885                 __u32 tx_put, tx_get, tx_bufsize;
2886
2887                 firm_id = card->base_addr + ID_ADDRESS;
2888                 zfw_ctrl = card->base_addr +
2889                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2890                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2891                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2892
2893                 tx_get = readl(&buf_ctrl->tx_get);
2894                 tx_put = readl(&buf_ctrl->tx_put);
2895                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2896                 if (tx_put >= tx_get)
2897                         char_count = tx_put - tx_get;
2898                 else
2899                         char_count = tx_put - tx_get + tx_bufsize;
2900 #ifdef CY_DEBUG_IO
2901                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2902                         info->line, info->xmit_cnt + char_count);
2903 #endif
2904                 return info->xmit_cnt + char_count;
2905         }
2906 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2907 }                               /* cy_chars_in_buffer */
2908
2909 /*
2910  * ------------------------------------------------------------
2911  * cy_ioctl() and friends
2912  * ------------------------------------------------------------
2913  */
2914
2915 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2916 {
2917         int co, co_val, bpr;
2918         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2919                         25000000);
2920
2921         if (baud == 0) {
2922                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2923                 return;
2924         }
2925
2926         /* determine which prescaler to use */
2927         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2928                 if (cy_clock / co_val / baud > 63)
2929                         break;
2930         }
2931
2932         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2933         if (bpr > 255)
2934                 bpr = 255;
2935
2936         info->tbpr = info->rbpr = bpr;
2937         info->tco = info->rco = co;
2938 }
2939
2940 /*
2941  * This routine finds or computes the various line characteristics.
2942  * It used to be called config_setup
2943  */
2944 static void set_line_char(struct cyclades_port *info)
2945 {
2946         struct cyclades_card *card;
2947         unsigned long flags;
2948         void __iomem *base_addr;
2949         int chip, channel, index;
2950         unsigned cflag, iflag;
2951         unsigned short chip_number;
2952         int baud, baud_rate = 0;
2953         int i;
2954
2955         if (!info->tty || !info->tty->termios) {
2956                 return;
2957         }
2958         if (info->line == -1) {
2959                 return;
2960         }
2961         cflag = info->tty->termios->c_cflag;
2962         iflag = info->tty->termios->c_iflag;
2963
2964         /*
2965          * Set up the tty->alt_speed kludge
2966          */
2967         if (info->tty) {
2968                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2969                         info->tty->alt_speed = 57600;
2970                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2971                         info->tty->alt_speed = 115200;
2972                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2973                         info->tty->alt_speed = 230400;
2974                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2975                         info->tty->alt_speed = 460800;
2976         }
2977
2978         card = info->card;
2979         channel = info->line - card->first_line;
2980         chip_number = channel / 4;
2981
2982         if (!IS_CYC_Z(*card)) {
2983
2984                 index = card->bus_index;
2985
2986                 /* baud rate */
2987                 baud = tty_get_baud_rate(info->tty);
2988                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
2989                                 ASYNC_SPD_CUST) {
2990                         if (info->custom_divisor)
2991                                 baud_rate = info->baud / info->custom_divisor;
2992                         else
2993                                 baud_rate = info->baud;
2994                 } else if (baud > CD1400_MAX_SPEED) {
2995                         baud = CD1400_MAX_SPEED;
2996                 }
2997                 /* find the baud index */
2998                 for (i = 0; i < 20; i++) {
2999                         if (baud == baud_table[i]) {
3000                                 break;
3001                         }
3002                 }
3003                 if (i == 20) {
3004                         i = 19; /* CD1400_MAX_SPEED */
3005                 }
3006
3007                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3008                                 ASYNC_SPD_CUST) {
3009                         cyy_baud_calc(info, baud_rate);
3010                 } else {
3011                         if (info->chip_rev >= CD1400_REV_J) {
3012                                 /* It is a CD1400 rev. J or later */
3013                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3014                                 info->tco = baud_co_60[i];      /* Tx CO */
3015                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3016                                 info->rco = baud_co_60[i];      /* Rx CO */
3017                         } else {
3018                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3019                                 info->tco = baud_co_25[i];      /* Tx CO */
3020                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3021                                 info->rco = baud_co_25[i];      /* Rx CO */
3022                         }
3023                 }
3024                 if (baud_table[i] == 134) {
3025                         /* get it right for 134.5 baud */
3026                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3027                                         2;
3028                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3029                                 ASYNC_SPD_CUST) {
3030                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3031                                         baud_rate) + 2;
3032                 } else if (baud_table[i]) {
3033                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3034                                         baud_table[i]) + 2;
3035                         /* this needs to be propagated into the card info */
3036                 } else {
3037                         info->timeout = 0;
3038                 }
3039                 /* By tradition (is it a standard?) a baud rate of zero
3040                    implies the line should be/has been closed.  A bit
3041                    later in this routine such a test is performed. */
3042
3043                 /* byte size and parity */
3044                 info->cor5 = 0;
3045                 info->cor4 = 0;
3046                 /* receive threshold */
3047                 info->cor3 = (info->default_threshold ?
3048                                 info->default_threshold : baud_cor3[i]);
3049                 info->cor2 = CyETC;
3050                 switch (cflag & CSIZE) {
3051                 case CS5:
3052                         info->cor1 = Cy_5_BITS;
3053                         break;
3054                 case CS6:
3055                         info->cor1 = Cy_6_BITS;
3056                         break;
3057                 case CS7:
3058                         info->cor1 = Cy_7_BITS;
3059                         break;
3060                 case CS8:
3061                         info->cor1 = Cy_8_BITS;
3062                         break;
3063                 }
3064                 if (cflag & CSTOPB) {
3065                         info->cor1 |= Cy_2_STOP;
3066                 }
3067                 if (cflag & PARENB) {
3068                         if (cflag & PARODD) {
3069                                 info->cor1 |= CyPARITY_O;
3070                         } else {
3071                                 info->cor1 |= CyPARITY_E;
3072                         }
3073                 } else {
3074                         info->cor1 |= CyPARITY_NONE;
3075                 }
3076
3077                 /* CTS flow control flag */
3078                 if (cflag & CRTSCTS) {
3079                         info->flags |= ASYNC_CTS_FLOW;
3080                         info->cor2 |= CyCtsAE;
3081                 } else {
3082                         info->flags &= ~ASYNC_CTS_FLOW;
3083                         info->cor2 &= ~CyCtsAE;
3084                 }
3085                 if (cflag & CLOCAL)
3086                         info->flags &= ~ASYNC_CHECK_CD;
3087                 else
3088                         info->flags |= ASYNC_CHECK_CD;
3089
3090          /***********************************************
3091             The hardware option, CyRtsAO, presents RTS when
3092             the chip has characters to send.  Since most modems
3093             use RTS as reverse (inbound) flow control, this
3094             option is not used.  If inbound flow control is
3095             necessary, DTR can be programmed to provide the
3096             appropriate signals for use with a non-standard
3097             cable.  Contact Marcio Saito for details.
3098          ***********************************************/
3099
3100                 chip = channel >> 2;
3101                 channel &= 0x03;
3102                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3103
3104                 spin_lock_irqsave(&card->card_lock, flags);
3105                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3106
3107                 /* tx and rx baud rate */
3108
3109                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3110                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3111                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3112                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3113
3114                 /* set line characteristics  according configuration */
3115
3116                 cy_writeb(base_addr + (CySCHR1 << index),
3117                           START_CHAR(info->tty));
3118                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3119                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3120                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3121                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3122                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3123                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3124
3125                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3126                                 CyCOR3ch, index);
3127
3128                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3129                 cy_writeb(base_addr + (CyRTPR << index),
3130                         (info->default_timeout ? info->default_timeout : 0x02));
3131                 /* 10ms rx timeout */
3132
3133                 if (C_CLOCAL(info->tty)) {
3134                         /* without modem intr */
3135                         cy_writeb(base_addr + (CySRER << index),
3136                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3137                         /* act on 1->0 modem transitions */
3138                         if ((cflag & CRTSCTS) && info->rflow) {
3139                                 cy_writeb(base_addr + (CyMCOR1 << index),
3140                                           (CyCTS | rflow_thr[i]));
3141                         } else {
3142                                 cy_writeb(base_addr + (CyMCOR1 << index),
3143                                           CyCTS);
3144                         }
3145                         /* act on 0->1 modem transitions */
3146                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3147                 } else {
3148                         /* without modem intr */
3149                         cy_writeb(base_addr + (CySRER << index),
3150                                   readb(base_addr +
3151                                            (CySRER << index)) | CyMdmCh);
3152                         /* act on 1->0 modem transitions */
3153                         if ((cflag & CRTSCTS) && info->rflow) {
3154                                 cy_writeb(base_addr + (CyMCOR1 << index),
3155                                           (CyDSR | CyCTS | CyRI | CyDCD |
3156                                            rflow_thr[i]));
3157                         } else {
3158                                 cy_writeb(base_addr + (CyMCOR1 << index),
3159                                           CyDSR | CyCTS | CyRI | CyDCD);
3160                         }
3161                         /* act on 0->1 modem transitions */
3162                         cy_writeb(base_addr + (CyMCOR2 << index),
3163                                   CyDSR | CyCTS | CyRI | CyDCD);
3164                 }
3165
3166                 if (i == 0) {   /* baud rate is zero, turn off line */
3167                         if (info->rtsdtr_inv) {
3168                                 cy_writeb(base_addr + (CyMSVR1 << index),
3169                                           ~CyRTS);
3170                         } else {
3171                                 cy_writeb(base_addr + (CyMSVR2 << index),
3172                                           ~CyDTR);
3173                         }
3174 #ifdef CY_DEBUG_DTR
3175                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3176                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3177                                 readb(base_addr + (CyMSVR1 << index)),
3178                                 readb(base_addr + (CyMSVR2 << index)));
3179 #endif
3180                 } else {
3181                         if (info->rtsdtr_inv) {
3182                                 cy_writeb(base_addr + (CyMSVR1 << index),
3183                                           CyRTS);
3184                         } else {
3185                                 cy_writeb(base_addr + (CyMSVR2 << index),
3186                                           CyDTR);
3187                         }
3188 #ifdef CY_DEBUG_DTR
3189                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3190                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3191                                 readb(base_addr + (CyMSVR1 << index)),
3192                                 readb(base_addr + (CyMSVR2 << index)));
3193 #endif
3194                 }
3195
3196                 if (info->tty) {
3197                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3198                 }
3199                 spin_unlock_irqrestore(&card->card_lock, flags);
3200
3201         } else {
3202                 struct FIRM_ID __iomem *firm_id;
3203                 struct ZFW_CTRL __iomem *zfw_ctrl;
3204                 struct BOARD_CTRL __iomem *board_ctrl;
3205                 struct CH_CTRL __iomem *ch_ctrl;
3206                 struct BUF_CTRL __iomem *buf_ctrl;
3207                 __u32 sw_flow;
3208                 int retval;
3209
3210                 firm_id = card->base_addr + ID_ADDRESS;
3211                 if (!ISZLOADED(*card)) {
3212                         return;
3213                 }
3214
3215                 zfw_ctrl = card->base_addr +
3216                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3217                 board_ctrl = &zfw_ctrl->board_ctrl;
3218                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3219                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3220
3221                 /* baud rate */
3222                 baud = tty_get_baud_rate(info->tty);
3223                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3224                                 ASYNC_SPD_CUST) {
3225                         if (info->custom_divisor)
3226                                 baud_rate = info->baud / info->custom_divisor;
3227                         else
3228                                 baud_rate = info->baud;
3229                 } else if (baud > CYZ_MAX_SPEED) {
3230                         baud = CYZ_MAX_SPEED;
3231                 }
3232                 cy_writel(&ch_ctrl->comm_baud, baud);
3233
3234                 if (baud == 134) {
3235                         /* get it right for 134.5 baud */
3236                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3237                                         2;
3238                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3239                                 ASYNC_SPD_CUST) {
3240                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3241                                         baud_rate) + 2;
3242                 } else if (baud) {
3243                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3244                                         baud) + 2;
3245                         /* this needs to be propagated into the card info */
3246                 } else {
3247                         info->timeout = 0;
3248                 }
3249
3250                 /* byte size and parity */
3251                 switch (cflag & CSIZE) {
3252                 case CS5:
3253                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3254                         break;
3255                 case CS6:
3256                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3257                         break;
3258                 case CS7:
3259                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3260                         break;
3261                 case CS8:
3262                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3263                         break;
3264                 }
3265                 if (cflag & CSTOPB) {
3266                         cy_writel(&ch_ctrl->comm_data_l,
3267                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3268                 } else {
3269                         cy_writel(&ch_ctrl->comm_data_l,
3270                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3271                 }
3272                 if (cflag & PARENB) {
3273                         if (cflag & PARODD) {
3274                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3275                         } else {
3276                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3277                         }
3278                 } else {
3279                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3280                 }
3281
3282                 /* CTS flow control flag */
3283                 if (cflag & CRTSCTS) {
3284                         cy_writel(&ch_ctrl->hw_flow,
3285                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3286                 } else {
3287                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3288                                         ~(C_RS_CTS | C_RS_RTS));
3289                 }
3290                 /* As the HW flow control is done in firmware, the driver
3291                    doesn't need to care about it */
3292                 info->flags &= ~ASYNC_CTS_FLOW;
3293
3294                 /* XON/XOFF/XANY flow control flags */
3295                 sw_flow = 0;
3296                 if (iflag & IXON) {
3297                         sw_flow |= C_FL_OXX;
3298                         if (iflag & IXANY)
3299                                 sw_flow |= C_FL_OIXANY;
3300                 }
3301                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3302
3303                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3304                 if (retval != 0) {
3305                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3306                                 "was %x\n", info->line, retval);
3307                 }
3308
3309                 /* CD sensitivity */
3310                 if (cflag & CLOCAL) {
3311                         info->flags &= ~ASYNC_CHECK_CD;
3312                 } else {
3313                         info->flags |= ASYNC_CHECK_CD;
3314                 }
3315
3316                 if (baud == 0) {        /* baud rate is zero, turn off line */
3317                         cy_writel(&ch_ctrl->rs_control,
3318                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3319 #ifdef CY_DEBUG_DTR
3320                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3321 #endif
3322                 } else {
3323                         cy_writel(&ch_ctrl->rs_control,
3324                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3325 #ifdef CY_DEBUG_DTR
3326                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3327 #endif
3328                 }
3329
3330                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3331                 if (retval != 0) {
3332                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3333                                 "was %x\n", info->line, retval);
3334                 }
3335
3336                 if (info->tty) {
3337                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3338                 }
3339         }
3340 }                               /* set_line_char */
3341
3342 static int
3343 get_serial_info(struct cyclades_port *info,
3344                 struct serial_struct __user * retinfo)
3345 {
3346         struct serial_struct tmp;
3347         struct cyclades_card *cinfo = info->card;
3348
3349         if (!retinfo)
3350                 return -EFAULT;
3351         memset(&tmp, 0, sizeof(tmp));
3352         tmp.type = info->type;
3353         tmp.line = info->line;
3354         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3355                 cinfo->first_line;
3356         tmp.irq = cinfo->irq;
3357         tmp.flags = info->flags;
3358         tmp.close_delay = info->close_delay;
3359         tmp.closing_wait = info->closing_wait;
3360         tmp.baud_base = info->baud;
3361         tmp.custom_divisor = info->custom_divisor;
3362         tmp.hub6 = 0;           /*!!! */
3363         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3364 }                               /* get_serial_info */
3365
3366 static int
3367 set_serial_info(struct cyclades_port *info,
3368                 struct serial_struct __user * new_info)
3369 {
3370         struct serial_struct new_serial;
3371         struct cyclades_port old_info;
3372
3373         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3374                 return -EFAULT;
3375         old_info = *info;
3376
3377         if (!capable(CAP_SYS_ADMIN)) {
3378                 if (new_serial.close_delay != info->close_delay ||
3379                                 new_serial.baud_base != info->baud ||
3380                                 (new_serial.flags & ASYNC_FLAGS &
3381                                         ~ASYNC_USR_MASK) !=
3382                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3383                         return -EPERM;
3384                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3385                                 (new_serial.flags & ASYNC_USR_MASK);
3386                 info->baud = new_serial.baud_base;
3387                 info->custom_divisor = new_serial.custom_divisor;
3388                 goto check_and_exit;
3389         }
3390
3391         /*
3392          * OK, past this point, all the error checking has been done.
3393          * At this point, we start making changes.....
3394          */
3395
3396         info->baud = new_serial.baud_base;
3397         info->custom_divisor = new_serial.custom_divisor;
3398         info->flags = (info->flags & ~ASYNC_FLAGS) |
3399                         (new_serial.flags & ASYNC_FLAGS);
3400         info->close_delay = new_serial.close_delay * HZ / 100;
3401         info->closing_wait = new_serial.closing_wait * HZ / 100;
3402
3403 check_and_exit:
3404         if (info->flags & ASYNC_INITIALIZED) {
3405                 set_line_char(info);
3406                 return 0;
3407         } else {
3408                 return startup(info);
3409         }
3410 }                               /* set_serial_info */
3411
3412 /*
3413  * get_lsr_info - get line status register info
3414  *
3415  * Purpose: Let user call ioctl() to get info when the UART physically
3416  *          is emptied.  On bus types like RS485, the transmitter must
3417  *          release the bus after transmitting. This must be done when
3418  *          the transmit shift register is empty, not be done when the
3419  *          transmit holding register is empty.  This functionality
3420  *          allows an RS485 driver to be written in user space.
3421  */
3422 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3423 {
3424         struct cyclades_card *card;
3425         int chip, channel, index;
3426         unsigned char status;
3427         unsigned int result;
3428         unsigned long flags;
3429         void __iomem *base_addr;
3430
3431         card = info->card;
3432         channel = (info->line) - (card->first_line);
3433         if (!IS_CYC_Z(*card)) {
3434                 chip = channel >> 2;
3435                 channel &= 0x03;
3436                 index = card->bus_index;
3437                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3438
3439                 spin_lock_irqsave(&card->card_lock, flags);
3440                 status = readb(base_addr + (CySRER << index)) &
3441                                 (CyTxRdy | CyTxMpty);
3442                 spin_unlock_irqrestore(&card->card_lock, flags);
3443                 result = (status ? 0 : TIOCSER_TEMT);
3444         } else {
3445                 /* Not supported yet */
3446                 return -EINVAL;
3447         }
3448         return put_user(result, (unsigned long __user *)value);
3449 }
3450
3451 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3452 {
3453         struct cyclades_port *info = tty->driver_data;
3454         struct cyclades_card *card;
3455         int chip, channel, index;
3456         void __iomem *base_addr;
3457         unsigned long flags;
3458         unsigned char status;
3459         unsigned long lstatus;
3460         unsigned int result;
3461         struct FIRM_ID __iomem *firm_id;
3462         struct ZFW_CTRL __iomem *zfw_ctrl;
3463         struct BOARD_CTRL __iomem *board_ctrl;
3464         struct CH_CTRL __iomem *ch_ctrl;
3465
3466         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3467                 return -ENODEV;
3468
3469         card = info->card;
3470         channel = info->line - card->first_line;
3471         if (!IS_CYC_Z(*card)) {
3472                 chip = channel >> 2;
3473                 channel &= 0x03;
3474                 index = card->bus_index;
3475                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3476
3477                 spin_lock_irqsave(&card->card_lock, flags);
3478                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3479                 status = readb(base_addr + (CyMSVR1 << index));
3480                 status |= readb(base_addr + (CyMSVR2 << index));
3481                 spin_unlock_irqrestore(&card->card_lock, flags);
3482
3483                 if (info->rtsdtr_inv) {
3484                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3485                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3486                 } else {
3487                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3488                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3489                 }
3490                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3491                         ((status & CyRI) ? TIOCM_RNG : 0) |
3492                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3493                         ((status & CyCTS) ? TIOCM_CTS : 0);
3494         } else {
3495                 base_addr = card->base_addr;
3496                 firm_id = card->base_addr + ID_ADDRESS;
3497                 if (ISZLOADED(*card)) {
3498                         zfw_ctrl = card->base_addr +
3499                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3500                         board_ctrl = &zfw_ctrl->board_ctrl;
3501                         ch_ctrl = zfw_ctrl->ch_ctrl;
3502                         lstatus = readl(&ch_ctrl[channel].rs_status);
3503                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3504                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3505                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3506                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3507                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3508                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3509                 } else {
3510                         result = 0;
3511                         return -ENODEV;
3512                 }
3513
3514         }
3515         return result;
3516 }                               /* cy_tiomget */
3517
3518 static int
3519 cy_tiocmset(struct tty_struct *tty, struct file *file,
3520                 unsigned int set, unsigned int clear)
3521 {
3522         struct cyclades_port *info = tty->driver_data;
3523         struct cyclades_card *card;
3524         int chip, channel, index;
3525         void __iomem *base_addr;
3526         unsigned long flags;
3527         struct FIRM_ID __iomem *firm_id;
3528         struct ZFW_CTRL __iomem *zfw_ctrl;
3529         struct BOARD_CTRL __iomem *board_ctrl;
3530         struct CH_CTRL __iomem *ch_ctrl;
3531         int retval;
3532
3533         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3534                 return -ENODEV;
3535
3536         card = info->card;
3537         channel = (info->line) - (card->first_line);
3538         if (!IS_CYC_Z(*card)) {
3539                 chip = channel >> 2;
3540                 channel &= 0x03;
3541                 index = card->bus_index;
3542                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3543
3544                 if (set & TIOCM_RTS) {
3545                         spin_lock_irqsave(&card->card_lock, flags);
3546                         cy_writeb(base_addr + (CyCAR << index),
3547                                   (u_char) channel);
3548                         if (info->rtsdtr_inv) {
3549                                 cy_writeb(base_addr + (CyMSVR2 << index),
3550                                           CyDTR);
3551                         } else {
3552                                 cy_writeb(base_addr + (CyMSVR1 << index),
3553                                           CyRTS);
3554                         }
3555                         spin_unlock_irqrestore(&card->card_lock, flags);
3556                 }
3557                 if (clear & TIOCM_RTS) {
3558                         spin_lock_irqsave(&card->card_lock, flags);
3559                         cy_writeb(base_addr + (CyCAR << index),
3560                                   (u_char) channel);
3561                         if (info->rtsdtr_inv) {
3562                                 cy_writeb(base_addr + (CyMSVR2 << index),
3563                                           ~CyDTR);
3564                         } else {
3565                                 cy_writeb(base_addr + (CyMSVR1 << index),
3566                                           ~CyRTS);
3567                         }
3568                         spin_unlock_irqrestore(&card->card_lock, flags);
3569                 }
3570                 if (set & TIOCM_DTR) {
3571                         spin_lock_irqsave(&card->card_lock, flags);
3572                         cy_writeb(base_addr + (CyCAR << index),
3573                                   (u_char) channel);
3574                         if (info->rtsdtr_inv) {
3575                                 cy_writeb(base_addr + (CyMSVR1 << index),
3576                                           CyRTS);
3577                         } else {
3578                                 cy_writeb(base_addr + (CyMSVR2 << index),
3579                                           CyDTR);
3580                         }
3581 #ifdef CY_DEBUG_DTR
3582                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3583                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3584                                 readb(base_addr + (CyMSVR1 << index)),
3585                                 readb(base_addr + (CyMSVR2 << index)));
3586 #endif
3587                         spin_unlock_irqrestore(&card->card_lock, flags);
3588                 }
3589                 if (clear & TIOCM_DTR) {
3590                         spin_lock_irqsave(&card->card_lock, flags);
3591                         cy_writeb(base_addr + (CyCAR << index),
3592                                   (u_char) channel);
3593                         if (info->rtsdtr_inv) {
3594                                 cy_writeb(base_addr + (CyMSVR1 << index),
3595                                           ~CyRTS);
3596                         } else {
3597                                 cy_writeb(base_addr + (CyMSVR2 << index),
3598                                           ~CyDTR);
3599                         }
3600
3601 #ifdef CY_DEBUG_DTR
3602                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3603                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3604                                 readb(base_addr + (CyMSVR1 << index)),
3605                                 readb(base_addr + (CyMSVR2 << index)));
3606 #endif
3607                         spin_unlock_irqrestore(&card->card_lock, flags);
3608                 }
3609         } else {
3610                 base_addr = card->base_addr;
3611
3612                 firm_id = card->base_addr + ID_ADDRESS;
3613                 if (ISZLOADED(*card)) {
3614                         zfw_ctrl = card->base_addr +
3615                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3616                         board_ctrl = &zfw_ctrl->board_ctrl;
3617                         ch_ctrl = zfw_ctrl->ch_ctrl;
3618
3619                         if (set & TIOCM_RTS) {
3620                                 spin_lock_irqsave(&card->card_lock, flags);
3621                                 cy_writel(&ch_ctrl[channel].rs_control,
3622                                         readl(&ch_ctrl[channel].rs_control) |
3623                                         C_RS_RTS);
3624                                 spin_unlock_irqrestore(&card->card_lock, flags);
3625                         }
3626                         if (clear & TIOCM_RTS) {
3627                                 spin_lock_irqsave(&card->card_lock, flags);
3628                                 cy_writel(&ch_ctrl[channel].rs_control,
3629                                         readl(&ch_ctrl[channel].rs_control) &
3630                                         ~C_RS_RTS);
3631                                 spin_unlock_irqrestore(&card->card_lock, flags);
3632                         }
3633                         if (set & TIOCM_DTR) {
3634                                 spin_lock_irqsave(&card->card_lock, flags);
3635                                 cy_writel(&ch_ctrl[channel].rs_control,
3636                                         readl(&ch_ctrl[channel].rs_control) |
3637                                         C_RS_DTR);
3638 #ifdef CY_DEBUG_DTR
3639                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3640                                         "Z DTR\n");
3641 #endif
3642                                 spin_unlock_irqrestore(&card->card_lock, flags);
3643                         }
3644                         if (clear & TIOCM_DTR) {
3645                                 spin_lock_irqsave(&card->card_lock, flags);
3646                                 cy_writel(&ch_ctrl[channel].rs_control,
3647                                         readl(&ch_ctrl[channel].rs_control) &
3648                                         ~C_RS_DTR);
3649 #ifdef CY_DEBUG_DTR
3650                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3651                                         "Z DTR\n");
3652 #endif
3653                                 spin_unlock_irqrestore(&card->card_lock, flags);
3654                         }
3655                 } else {
3656                         return -ENODEV;
3657                 }
3658                 spin_lock_irqsave(&card->card_lock, flags);
3659                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3660                 if (retval != 0) {
3661                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3662                                 "was %x\n", info->line, retval);
3663                 }
3664                 spin_unlock_irqrestore(&card->card_lock, flags);
3665         }
3666         return 0;
3667 }                               /* cy_tiocmset */
3668
3669 /*
3670  * cy_break() --- routine which turns the break handling on or off
3671  */
3672 static void cy_break(struct tty_struct *tty, int break_state)
3673 {
3674         struct cyclades_port *info = tty->driver_data;
3675         struct cyclades_card *card;
3676         unsigned long flags;
3677
3678         if (serial_paranoia_check(info, tty->name, "cy_break"))
3679                 return;
3680
3681         card = info->card;
3682
3683         spin_lock_irqsave(&card->card_lock, flags);
3684         if (!IS_CYC_Z(*card)) {
3685                 /* Let the transmit ISR take care of this (since it
3686                    requires stuffing characters into the output stream).
3687                  */
3688                 if (break_state == -1) {
3689                         if (!info->breakon) {
3690                                 info->breakon = 1;
3691                                 if (!info->xmit_cnt) {
3692                                         spin_unlock_irqrestore(&card->card_lock, flags);
3693                                         start_xmit(info);
3694                                         spin_lock_irqsave(&card->card_lock, flags);
3695                                 }
3696                         }
3697                 } else {
3698                         if (!info->breakoff) {
3699                                 info->breakoff = 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                 }
3707         } else {
3708                 int retval;
3709
3710                 if (break_state == -1) {
3711                         retval = cyz_issue_cmd(card,
3712                                 info->line - card->first_line,
3713                                 C_CM_SET_BREAK, 0L);
3714                         if (retval != 0) {
3715                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3716                                         "ttyC%d was %x\n", info->line, retval);
3717                         }
3718                 } else {
3719                         retval = cyz_issue_cmd(card,
3720                                 info->line - card->first_line,
3721                                 C_CM_CLR_BREAK, 0L);
3722                         if (retval != 0) {
3723                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3724                                         "on ttyC%d was %x\n", info->line,
3725                                         retval);
3726                         }
3727                 }
3728         }
3729         spin_unlock_irqrestore(&card->card_lock, flags);
3730 }                               /* cy_break */
3731
3732 static int
3733 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3734 {
3735
3736         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3737                 return -EFAULT;
3738         info->mon.int_count = 0;
3739         info->mon.char_count = 0;
3740         info->mon.char_max = 0;
3741         info->mon.char_last = 0;
3742         return 0;
3743 }                               /* get_mon_info */
3744
3745 static int set_threshold(struct cyclades_port *info, unsigned long value)
3746 {
3747         struct cyclades_card *card;
3748         void __iomem *base_addr;
3749         int channel, chip, index;
3750         unsigned long flags;
3751
3752         card = info->card;
3753         channel = info->line - card->first_line;
3754         if (!IS_CYC_Z(*card)) {
3755                 chip = channel >> 2;
3756                 channel &= 0x03;
3757                 index = card->bus_index;
3758                 base_addr =
3759                     card->base_addr + (cy_chip_offset[chip] << index);
3760
3761                 info->cor3 &= ~CyREC_FIFO;
3762                 info->cor3 |= value & CyREC_FIFO;
3763
3764                 spin_lock_irqsave(&card->card_lock, flags);
3765                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3766                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3767                 spin_unlock_irqrestore(&card->card_lock, flags);
3768         }
3769         return 0;
3770 }                               /* set_threshold */
3771
3772 static int
3773 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3774 {
3775         struct cyclades_card *card;
3776         void __iomem *base_addr;
3777         int channel, chip, index;
3778         unsigned long tmp;
3779
3780         card = info->card;
3781         channel = info->line - card->first_line;
3782         if (!IS_CYC_Z(*card)) {
3783                 chip = channel >> 2;
3784                 channel &= 0x03;
3785                 index = card->bus_index;
3786                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3787
3788                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3789                 return put_user(tmp, value);
3790         }
3791         return 0;
3792 }                               /* get_threshold */
3793
3794 static int
3795 set_default_threshold(struct cyclades_port *info, unsigned long value)
3796 {
3797         info->default_threshold = value & 0x0f;
3798         return 0;
3799 }                               /* set_default_threshold */
3800
3801 static int
3802 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3803 {
3804         return put_user(info->default_threshold, value);
3805 }                               /* get_default_threshold */
3806
3807 static int set_timeout(struct cyclades_port *info, unsigned long value)
3808 {
3809         struct cyclades_card *card;
3810         void __iomem *base_addr;
3811         int channel, chip, index;
3812         unsigned long flags;
3813
3814         card = info->card;
3815         channel = info->line - card->first_line;
3816         if (!IS_CYC_Z(*card)) {
3817                 chip = channel >> 2;
3818                 channel &= 0x03;
3819                 index = card->bus_index;
3820                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3821
3822                 spin_lock_irqsave(&card->card_lock, flags);
3823                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3824                 spin_unlock_irqrestore(&card->card_lock, flags);
3825         }
3826         return 0;
3827 }                               /* set_timeout */
3828
3829 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3830 {
3831         struct cyclades_card *card;
3832         void __iomem *base_addr;
3833         int channel, chip, index;
3834         unsigned long tmp;
3835
3836         card = info->card;
3837         channel = info->line - card->first_line;
3838         if (!IS_CYC_Z(*card)) {
3839                 chip = channel >> 2;
3840                 channel &= 0x03;
3841                 index = card->bus_index;
3842                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3843
3844                 tmp = readb(base_addr + (CyRTPR << index));
3845                 return put_user(tmp, value);
3846         }
3847         return 0;
3848 }                               /* get_timeout */
3849
3850 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3851 {
3852         info->default_timeout = value & 0xff;
3853         return 0;
3854 }                               /* set_default_timeout */
3855
3856 static int
3857 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3858 {
3859         return put_user(info->default_timeout, value);
3860 }                               /* get_default_timeout */
3861
3862 /*
3863  * This routine allows the tty driver to implement device-
3864  * specific ioctl's.  If the ioctl number passed in cmd is
3865  * not recognized by the driver, it should return ENOIOCTLCMD.
3866  */
3867 static int
3868 cy_ioctl(struct tty_struct *tty, struct file *file,
3869          unsigned int cmd, unsigned long arg)
3870 {
3871         struct cyclades_port *info = tty->driver_data;
3872         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3873         struct serial_icounter_struct __user *p_cuser;  /* user space */
3874         int ret_val = 0;
3875         unsigned long flags;
3876         void __user *argp = (void __user *)arg;
3877
3878         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3879                 return -ENODEV;
3880
3881 #ifdef CY_DEBUG_OTHER
3882         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3883                 info->line, cmd, arg);
3884 #endif
3885
3886         switch (cmd) {
3887         case CYGETMON:
3888                 ret_val = get_mon_info(info, argp);
3889                 break;
3890         case CYGETTHRESH:
3891                 ret_val = get_threshold(info, argp);
3892                 break;
3893         case CYSETTHRESH:
3894                 ret_val = set_threshold(info, arg);
3895                 break;
3896         case CYGETDEFTHRESH:
3897                 ret_val = get_default_threshold(info, argp);
3898                 break;
3899         case CYSETDEFTHRESH:
3900                 ret_val = set_default_threshold(info, arg);
3901                 break;
3902         case CYGETTIMEOUT:
3903                 ret_val = get_timeout(info, argp);
3904                 break;
3905         case CYSETTIMEOUT:
3906                 ret_val = set_timeout(info, arg);
3907                 break;
3908         case CYGETDEFTIMEOUT:
3909                 ret_val = get_default_timeout(info, argp);
3910                 break;
3911         case CYSETDEFTIMEOUT:
3912                 ret_val = set_default_timeout(info, arg);
3913                 break;
3914         case CYSETRFLOW:
3915                 info->rflow = (int)arg;
3916                 ret_val = 0;
3917                 break;
3918         case CYGETRFLOW:
3919                 ret_val = info->rflow;
3920                 break;
3921         case CYSETRTSDTR_INV:
3922                 info->rtsdtr_inv = (int)arg;
3923                 ret_val = 0;
3924                 break;
3925         case CYGETRTSDTR_INV:
3926                 ret_val = info->rtsdtr_inv;
3927                 break;
3928         case CYGETCD1400VER:
3929                 ret_val = info->chip_rev;
3930                 break;
3931 #ifndef CONFIG_CYZ_INTR
3932         case CYZSETPOLLCYCLE:
3933                 cyz_polling_cycle = (arg * HZ) / 1000;
3934                 ret_val = 0;
3935                 break;
3936         case CYZGETPOLLCYCLE:
3937                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3938                 break;
3939 #endif                          /* CONFIG_CYZ_INTR */
3940         case CYSETWAIT:
3941                 info->closing_wait = (unsigned short)arg *HZ / 100;
3942                 ret_val = 0;
3943                 break;
3944         case CYGETWAIT:
3945                 ret_val = info->closing_wait / (HZ / 100);
3946                 break;
3947         case TIOCGSERIAL:
3948                 ret_val = get_serial_info(info, argp);
3949                 break;
3950         case TIOCSSERIAL:
3951                 ret_val = set_serial_info(info, argp);
3952                 break;
3953         case TIOCSERGETLSR:     /* Get line status register */
3954                 ret_val = get_lsr_info(info, argp);
3955                 break;
3956                 /*
3957                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3958                  * - mask passed in arg for lines of interest
3959                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3960                  * Caller should use TIOCGICOUNT to see which one it was
3961                  */
3962         case TIOCMIWAIT:
3963                 spin_lock_irqsave(&info->card->card_lock, flags);
3964                 /* note the counters on entry */
3965                 cnow = info->icount;
3966                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3967                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3968                         cprev = cnow;
3969                         spin_lock_irqsave(&info->card->card_lock, flags);
3970                         cnow = info->icount;    /* atomic copy */
3971                         spin_unlock_irqrestore(&info->card->card_lock, flags);
3972
3973                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3974                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3975                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
3976                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3977                 }));
3978                 break;
3979
3980                 /*
3981                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3982                  * Return: write counters to the user passed counter struct
3983                  * NB: both 1->0 and 0->1 transitions are counted except for
3984                  *     RI where only 0->1 is counted.
3985                  */
3986         case TIOCGICOUNT:
3987                 spin_lock_irqsave(&info->card->card_lock, flags);
3988                 cnow = info->icount;
3989                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3990                 p_cuser = argp;
3991                 ret_val = put_user(cnow.cts, &p_cuser->cts);
3992                 if (ret_val)
3993                         return ret_val;
3994                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
3995                 if (ret_val)
3996                         return ret_val;
3997                 ret_val = put_user(cnow.rng, &p_cuser->rng);
3998                 if (ret_val)
3999                         return ret_val;
4000                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4001                 if (ret_val)
4002                         return ret_val;
4003                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4004                 if (ret_val)
4005                         return ret_val;
4006                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4007                 if (ret_val)
4008                         return ret_val;
4009                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4010                 if (ret_val)
4011                         return ret_val;
4012                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4013                 if (ret_val)
4014                         return ret_val;
4015                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4016                 if (ret_val)
4017                         return ret_val;
4018                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4019                 if (ret_val)
4020                         return ret_val;
4021                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4022                 if (ret_val)
4023                         return ret_val;
4024                 ret_val = 0;
4025                 break;
4026         default:
4027                 ret_val = -ENOIOCTLCMD;
4028         }
4029
4030 #ifdef CY_DEBUG_OTHER
4031         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4032 #endif
4033
4034         return ret_val;
4035 }                               /* cy_ioctl */
4036
4037 /*
4038  * This routine allows the tty driver to be notified when
4039  * device's termios settings have changed.  Note that a
4040  * well-designed tty driver should be prepared to accept the case
4041  * where old == NULL, and try to do something rational.
4042  */
4043 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4044 {
4045         struct cyclades_port *info = tty->driver_data;
4046
4047 #ifdef CY_DEBUG_OTHER
4048         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4049 #endif
4050
4051         set_line_char(info);
4052
4053         if ((old_termios->c_cflag & CRTSCTS) &&
4054                         !(tty->termios->c_cflag & CRTSCTS)) {
4055                 tty->hw_stopped = 0;
4056                 cy_start(tty);
4057         }
4058 #if 0
4059         /*
4060          * No need to wake up processes in open wait, since they
4061          * sample the CLOCAL flag once, and don't recheck it.
4062          * XXX  It's not clear whether the current behavior is correct
4063          * or not.  Hence, this may change.....
4064          */
4065         if (!(old_termios->c_cflag & CLOCAL) &&
4066             (tty->termios->c_cflag & CLOCAL))
4067                 wake_up_interruptible(&info->open_wait);
4068 #endif
4069 }                               /* cy_set_termios */
4070
4071 /* This function is used to send a high-priority XON/XOFF character to
4072    the device.
4073 */
4074 static void cy_send_xchar(struct tty_struct *tty, char ch)
4075 {
4076         struct cyclades_port *info = tty->driver_data;
4077         struct cyclades_card *card;
4078         int channel;
4079
4080         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4081                 return;
4082
4083         info->x_char = ch;
4084
4085         if (ch)
4086                 cy_start(tty);
4087
4088         card = info->card;
4089         channel = info->line - card->first_line;
4090
4091         if (IS_CYC_Z(*card)) {
4092                 if (ch == STOP_CHAR(tty))
4093                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4094                 else if (ch == START_CHAR(tty))
4095                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4096         }
4097 }
4098
4099 /* This routine is called by the upper-layer tty layer to signal
4100    that incoming characters should be throttled because the input
4101    buffers are close to full.
4102  */
4103 static void cy_throttle(struct tty_struct *tty)
4104 {
4105         struct cyclades_port *info = tty->driver_data;
4106         struct cyclades_card *card;
4107         unsigned long flags;
4108         void __iomem *base_addr;
4109         int chip, channel, index;
4110
4111 #ifdef CY_DEBUG_THROTTLE
4112         char buf[64];
4113
4114         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4115                         tty->ldisc.chars_in_buffer(tty), info->line);
4116 #endif
4117
4118         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4119                 return;
4120         }
4121
4122         card = info->card;
4123
4124         if (I_IXOFF(tty)) {
4125                 if (!IS_CYC_Z(*card))
4126                         cy_send_xchar(tty, STOP_CHAR(tty));
4127                 else
4128                         info->throttle = 1;
4129         }
4130
4131         if (tty->termios->c_cflag & CRTSCTS) {
4132                 channel = info->line - card->first_line;
4133                 if (!IS_CYC_Z(*card)) {
4134                         chip = channel >> 2;
4135                         channel &= 0x03;
4136                         index = card->bus_index;
4137                         base_addr = card->base_addr +
4138                                 (cy_chip_offset[chip] << index);
4139
4140                         spin_lock_irqsave(&card->card_lock, flags);
4141                         cy_writeb(base_addr + (CyCAR << index),
4142                                   (u_char) channel);
4143                         if (info->rtsdtr_inv) {
4144                                 cy_writeb(base_addr + (CyMSVR2 << index),
4145                                           ~CyDTR);
4146                         } else {
4147                                 cy_writeb(base_addr + (CyMSVR1 << index),
4148                                           ~CyRTS);
4149                         }
4150                         spin_unlock_irqrestore(&card->card_lock, flags);
4151                 } else {
4152                         info->throttle = 1;
4153                 }
4154         }
4155 }                               /* cy_throttle */
4156
4157 /*
4158  * This routine notifies the tty driver that it should signal
4159  * that characters can now be sent to the tty without fear of
4160  * overrunning the input buffers of the line disciplines.
4161  */
4162 static void cy_unthrottle(struct tty_struct *tty)
4163 {
4164         struct cyclades_port *info = tty->driver_data;
4165         struct cyclades_card *card;
4166         unsigned long flags;
4167         void __iomem *base_addr;
4168         int chip, channel, index;
4169
4170 #ifdef CY_DEBUG_THROTTLE
4171         char buf[64];
4172
4173         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4174                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4175 #endif
4176
4177         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4178                 return;
4179         }
4180
4181         if (I_IXOFF(tty)) {
4182                 if (info->x_char)
4183                         info->x_char = 0;
4184                 else
4185                         cy_send_xchar(tty, START_CHAR(tty));
4186         }
4187
4188         if (tty->termios->c_cflag & CRTSCTS) {
4189                 card = info->card;
4190                 channel = info->line - card->first_line;
4191                 if (!IS_CYC_Z(*card)) {
4192                         chip = channel >> 2;
4193                         channel &= 0x03;
4194                         index = card->bus_index;
4195                         base_addr = card->base_addr +
4196                                 (cy_chip_offset[chip] << index);
4197
4198                         spin_lock_irqsave(&card->card_lock, flags);
4199                         cy_writeb(base_addr + (CyCAR << index),
4200                                   (u_char) channel);
4201                         if (info->rtsdtr_inv) {
4202                                 cy_writeb(base_addr + (CyMSVR2 << index),
4203                                           CyDTR);
4204                         } else {
4205                                 cy_writeb(base_addr + (CyMSVR1 << index),
4206                                           CyRTS);
4207                         }
4208                         spin_unlock_irqrestore(&card->card_lock, flags);
4209                 } else {
4210                         info->throttle = 0;
4211                 }
4212         }
4213 }                               /* cy_unthrottle */
4214
4215 /* cy_start and cy_stop provide software output flow control as a
4216    function of XON/XOFF, software CTS, and other such stuff.
4217 */
4218 static void cy_stop(struct tty_struct *tty)
4219 {
4220         struct cyclades_card *cinfo;
4221         struct cyclades_port *info = tty->driver_data;
4222         void __iomem *base_addr;
4223         int chip, channel, index;
4224         unsigned long flags;
4225
4226 #ifdef CY_DEBUG_OTHER
4227         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4228 #endif
4229
4230         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4231                 return;
4232
4233         cinfo = info->card;
4234         channel = info->line - cinfo->first_line;
4235         if (!IS_CYC_Z(*cinfo)) {
4236                 index = cinfo->bus_index;
4237                 chip = channel >> 2;
4238                 channel &= 0x03;
4239                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4240
4241                 spin_lock_irqsave(&cinfo->card_lock, flags);
4242                 cy_writeb(base_addr + (CyCAR << index),
4243                         (u_char)(channel & 0x0003)); /* index channel */
4244                 cy_writeb(base_addr + (CySRER << index),
4245                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4246                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4247         }
4248 }                               /* cy_stop */
4249
4250 static void cy_start(struct tty_struct *tty)
4251 {
4252         struct cyclades_card *cinfo;
4253         struct cyclades_port *info = tty->driver_data;
4254         void __iomem *base_addr;
4255         int chip, channel, index;
4256         unsigned long flags;
4257
4258 #ifdef CY_DEBUG_OTHER
4259         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4260 #endif
4261
4262         if (serial_paranoia_check(info, tty->name, "cy_start"))
4263                 return;
4264
4265         cinfo = info->card;
4266         channel = info->line - cinfo->first_line;
4267         index = cinfo->bus_index;
4268         if (!IS_CYC_Z(*cinfo)) {
4269                 chip = channel >> 2;
4270                 channel &= 0x03;
4271                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4272
4273                 spin_lock_irqsave(&cinfo->card_lock, flags);
4274                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4275                 cy_writeb(base_addr + (CySRER << index),
4276                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4277                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4278         }
4279 }                               /* cy_start */
4280
4281 static void cy_flush_buffer(struct tty_struct *tty)
4282 {
4283         struct cyclades_port *info = tty->driver_data;
4284         struct cyclades_card *card;
4285         int channel, retval;
4286         unsigned long flags;
4287
4288 #ifdef CY_DEBUG_IO
4289         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4290 #endif
4291
4292         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4293                 return;
4294
4295         card = info->card;
4296         channel = info->line - card->first_line;
4297
4298         spin_lock_irqsave(&card->card_lock, flags);
4299         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4300         spin_unlock_irqrestore(&card->card_lock, flags);
4301
4302         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4303                                            buffers as well */
4304                 spin_lock_irqsave(&card->card_lock, flags);
4305                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4306                 if (retval != 0) {
4307                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4308                                 "was %x\n", info->line, retval);
4309                 }
4310                 spin_unlock_irqrestore(&card->card_lock, flags);
4311         }
4312         tty_wakeup(tty);
4313 }                               /* cy_flush_buffer */
4314
4315 /*
4316  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4317  */
4318 static void cy_hangup(struct tty_struct *tty)
4319 {
4320         struct cyclades_port *info = tty->driver_data;
4321
4322 #ifdef CY_DEBUG_OTHER
4323         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4324 #endif
4325
4326         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4327                 return;
4328
4329         cy_flush_buffer(tty);
4330         shutdown(info);
4331         info->count = 0;
4332 #ifdef CY_DEBUG_COUNT
4333         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4334                 current->pid);
4335 #endif
4336         info->tty = NULL;
4337         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4338         wake_up_interruptible(&info->open_wait);
4339 }                               /* cy_hangup */
4340
4341 /*
4342  * ---------------------------------------------------------------------
4343  * cy_init() and friends
4344  *
4345  * cy_init() is called at boot-time to initialize the serial driver.
4346  * ---------------------------------------------------------------------
4347  */
4348
4349 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4350 {
4351         struct cyclades_port *info;
4352         u32 uninitialized_var(mailbox);
4353         unsigned int nports, port;
4354         unsigned short chip_number;
4355         int uninitialized_var(index);
4356
4357         spin_lock_init(&cinfo->card_lock);
4358
4359         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4360                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4361                                      cinfo->ctl_addr)->mail_box_0);
4362                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4363                 cinfo->intr_enabled = 0;
4364                 cinfo->nports = 0;      /* Will be correctly set later, after
4365                                            Z FW is loaded */
4366         } else {
4367                 index = cinfo->bus_index;
4368                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4369         }
4370
4371         cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4372         if (cinfo->ports == NULL) {
4373                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4374                 cinfo->nports = 0;
4375                 return -ENOMEM;
4376         }
4377
4378         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4379                         port++) {
4380                 info = &cinfo->ports[port - cinfo->first_line];
4381                 info->magic = CYCLADES_MAGIC;
4382                 info->card = cinfo;
4383                 info->line = port;
4384                 info->flags = STD_COM_FLAGS;
4385                 info->closing_wait = CLOSING_WAIT_DELAY;
4386                 info->close_delay = 5 * HZ / 10;
4387
4388                 init_waitqueue_head(&info->open_wait);
4389                 init_waitqueue_head(&info->close_wait);
4390                 init_completion(&info->shutdown_wait);
4391                 init_waitqueue_head(&info->delta_msr_wait);
4392
4393                 if (IS_CYC_Z(*cinfo)) {
4394                         info->type = PORT_STARTECH;
4395                         if (mailbox == ZO_V1)
4396                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4397                         else
4398                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4399 #ifdef CONFIG_CYZ_INTR
4400                         setup_timer(&cyz_rx_full_timer[port],
4401                                 cyz_rx_restart, (unsigned long)info);
4402 #endif
4403                 } else {
4404                         info->type = PORT_CIRRUS;
4405                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4406                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4407                         info->cor2 = CyETC;
4408                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4409
4410                         chip_number = (port - cinfo->first_line) / 4;
4411                         if ((info->chip_rev = readb(cinfo->base_addr +
4412                                       (cy_chip_offset[chip_number] <<
4413                                        index) + (CyGFRCR << index))) >=
4414                             CD1400_REV_J) {
4415                                 /* It is a CD1400 rev. J or later */
4416                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4417                                 info->tco = baud_co_60[13];     /* Tx CO */
4418                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4419                                 info->rco = baud_co_60[13];     /* Rx CO */
4420                                 info->rtsdtr_inv = 1;
4421                         } else {
4422                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4423                                 info->tco = baud_co_25[13];     /* Tx CO */
4424                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4425                                 info->rco = baud_co_25[13];     /* Rx CO */
4426                                 info->rtsdtr_inv = 0;
4427                         }
4428                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4429                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4430                 }
4431
4432         }
4433
4434 #ifndef CONFIG_CYZ_INTR
4435         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4436                 mod_timer(&cyz_timerlist, jiffies + 1);
4437 #ifdef CY_PCI_DEBUG
4438                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4439 #endif
4440         }
4441 #endif
4442         return 0;
4443 }
4444
4445 /* initialize chips on Cyclom-Y card -- return number of valid
4446    chips (which is number of ports/4) */
4447 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4448                 int index)
4449 {
4450         unsigned int chip_number;
4451         void __iomem *base_addr;
4452
4453         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4454         /* Cy_HwReset is 0x1400 */
4455         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4456         /* Cy_ClrIntr is 0x1800 */
4457         udelay(500L);
4458
4459         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4460                 base_addr =
4461                     true_base_addr + (cy_chip_offset[chip_number] << index);
4462                 mdelay(1);
4463                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4464                         /*************
4465                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4466                         chip_number, (unsigned long)base_addr);
4467                         *************/
4468                         return chip_number;
4469                 }
4470
4471                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4472                 udelay(10L);
4473
4474                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4475                    cannot distinguish between references to chip 0 and a non-
4476                    existent chip 4.  If the preceding clearing of the supposed
4477                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4478                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4479                  */
4480                 if (chip_number == 4 && readb(true_base_addr +
4481                                 (cy_chip_offset[0] << index) +
4482                                 (CyGFRCR << index)) == 0) {
4483                         return chip_number;
4484                 }
4485
4486                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4487                 mdelay(1);
4488
4489                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4490                         /*
4491                            printk(" chip #%d at %#6lx is not responding ",
4492                            chip_number, (unsigned long)base_addr);
4493                            printk("(GFRCR stayed 0)\n",
4494                          */
4495                         return chip_number;
4496                 }
4497                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4498                                 0x40) {
4499                         /*
4500                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4501                                         "%#2x)\n",
4502                                         chip_number, (unsigned long)base_addr,
4503                                         base_addr[CyGFRCR<<index]);
4504                          */
4505                         return chip_number;
4506                 }
4507                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4508                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4509                         /* It is a CD1400 rev. J or later */
4510                         /* Impossible to reach 5ms with this chip.
4511                            Changed to 2ms instead (f = 500 Hz). */
4512                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4513                 } else {
4514                         /* f = 200 Hz */
4515                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4516                 }
4517
4518                 /*
4519                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4520                    chip_number, (unsigned long)base_addr,
4521                    readb(base_addr+(CyGFRCR<<index)));
4522                  */
4523         }
4524         return chip_number;
4525 }                               /* cyy_init_card */
4526
4527 /*
4528  * ---------------------------------------------------------------------
4529  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4530  * sets global variables and return the number of ISA boards found.
4531  * ---------------------------------------------------------------------
4532  */
4533 static int __init cy_detect_isa(void)
4534 {
4535 #ifdef CONFIG_ISA
4536         unsigned short cy_isa_irq, nboard;
4537         void __iomem *cy_isa_address;
4538         unsigned short i, j, cy_isa_nchan;
4539 #ifdef MODULE
4540         int isparam = 0;
4541 #endif
4542
4543         nboard = 0;
4544
4545 #ifdef MODULE
4546         /* Check for module parameters */
4547         for (i = 0; i < NR_CARDS; i++) {
4548                 if (maddr[i] || i) {
4549                         isparam = 1;
4550                         cy_isa_addresses[i] = maddr[i];
4551                 }
4552                 if (!maddr[i])
4553                         break;
4554         }
4555 #endif
4556
4557         /* scan the address table probing for Cyclom-Y/ISA boards */
4558         for (i = 0; i < NR_ISA_ADDRS; i++) {
4559                 unsigned int isa_address = cy_isa_addresses[i];
4560                 if (isa_address == 0x0000) {
4561                         return nboard;
4562                 }
4563
4564                 /* probe for CD1400... */
4565                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4566                 if (cy_isa_address == NULL) {
4567                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4568                                         "address\n");
4569                         continue;
4570                 }
4571                 cy_isa_nchan = CyPORTS_PER_CHIP *
4572                         cyy_init_card(cy_isa_address, 0);
4573                 if (cy_isa_nchan == 0) {
4574                         iounmap(cy_isa_address);
4575                         continue;
4576                 }
4577 #ifdef MODULE
4578                 if (isparam && irq[i])
4579                         cy_isa_irq = irq[i];
4580                 else
4581 #endif
4582                         /* find out the board's irq by probing */
4583                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4584                 if (cy_isa_irq == 0) {
4585                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4586                                 "IRQ could not be detected.\n",
4587                                 (unsigned long)cy_isa_address);
4588                         iounmap(cy_isa_address);
4589                         continue;
4590                 }
4591
4592                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4593                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4594                                 "more channels are available. Change NR_PORTS "
4595                                 "in cyclades.c and recompile kernel.\n",
4596                                 (unsigned long)cy_isa_address);
4597                         iounmap(cy_isa_address);
4598                         return nboard;
4599                 }
4600                 /* fill the next cy_card structure available */
4601                 for (j = 0; j < NR_CARDS; j++) {
4602                         if (cy_card[j].base_addr == NULL)
4603                                 break;
4604                 }
4605                 if (j == NR_CARDS) {    /* no more cy_cards available */
4606                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4607                                 "more cards can be used. Change NR_CARDS in "
4608                                 "cyclades.c and recompile kernel.\n",
4609                                 (unsigned long)cy_isa_address);
4610                         iounmap(cy_isa_address);
4611                         return nboard;
4612                 }
4613
4614                 /* allocate IRQ */
4615                 if (request_irq(cy_isa_irq, cyy_interrupt,
4616                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4617                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4618                                 "could not allocate IRQ#%d.\n",
4619                                 (unsigned long)cy_isa_address, cy_isa_irq);
4620                         iounmap(cy_isa_address);
4621                         return nboard;
4622                 }
4623
4624                 /* set cy_card */
4625                 cy_card[j].base_addr = cy_isa_address;
4626                 cy_card[j].ctl_addr = NULL;
4627                 cy_card[j].irq = (int)cy_isa_irq;
4628                 cy_card[j].bus_index = 0;
4629                 cy_card[j].first_line = cy_next_channel;
4630                 cy_card[j].num_chips = cy_isa_nchan / 4;
4631                 if (cy_init_card(&cy_card[j])) {
4632                         cy_card[j].base_addr = NULL;
4633                         free_irq(cy_isa_irq, &cy_card[j]);
4634                         iounmap(cy_isa_address);
4635                         continue;
4636                 }
4637                 nboard++;
4638
4639                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4640                         "%d channels starting from port %d\n",
4641                         j + 1, (unsigned long)cy_isa_address,
4642                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4643                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4644
4645                 for (j = cy_next_channel;
4646                                 j < cy_next_channel + cy_isa_nchan; j++)
4647                         tty_register_device(cy_serial_driver, j, NULL);
4648                 cy_next_channel += cy_isa_nchan;
4649         }
4650         return nboard;
4651 #else
4652         return 0;
4653 #endif                          /* CONFIG_ISA */
4654 }                               /* cy_detect_isa */
4655
4656 #ifdef CONFIG_PCI
4657 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4658 {
4659         unsigned int a;
4660
4661         for (a = 0; a < size && *str; a++, str++)
4662                 if (*str & 0x80)
4663                         return -EINVAL;
4664
4665         for (; a < size; a++, str++)
4666                 if (*str)
4667                         return -EINVAL;
4668
4669         return 0;
4670 }
4671
4672 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4673                 unsigned int size)
4674 {
4675         for (; size > 0; size--) {
4676                 cy_writel(fpga, *data++);
4677                 udelay(10);
4678         }
4679 }
4680
4681 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4682                 struct RUNTIME_9060 __iomem *addr)
4683 {
4684         /* Reset PLX */
4685         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4686         udelay(100L);
4687         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4688
4689         /* Reload Config. Registers from EEPROM */
4690         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4691         udelay(100L);
4692         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4693
4694         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4695          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4696          * registers. This will remain here until we find a permanent fix.
4697          */
4698         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4699 }
4700
4701 static int __devinit __cyz_load_fw(const struct firmware *fw,
4702                 const char *name, const u32 mailbox, void __iomem *base,
4703                 void __iomem *fpga)
4704 {
4705         void *ptr = fw->data;
4706         struct zfile_header *h = ptr;
4707         struct zfile_config *c, *cs;
4708         struct zfile_block *b, *bs;
4709         unsigned int a, tmp, len = fw->size;
4710 #define BAD_FW KERN_ERR "Bad firmware: "
4711         if (len < sizeof(*h)) {
4712                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4713                 return -EINVAL;
4714         }
4715
4716         cs = ptr + h->config_offset;
4717         bs = ptr + h->block_offset;
4718
4719         if ((void *)(cs + h->n_config) > ptr + len ||
4720                         (void *)(bs + h->n_blocks) > ptr + len) {
4721                 printk(BAD_FW "too short");
4722                 return  -EINVAL;
4723         }
4724
4725         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4726                         cyc_isfwstr(h->date, sizeof(h->date))) {
4727                 printk(BAD_FW "bad formatted header string\n");
4728                 return -EINVAL;
4729         }
4730
4731         if (strncmp(name, h->name, sizeof(h->name))) {
4732                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4733                 return -EINVAL;
4734         }
4735
4736         tmp = 0;
4737         for (c = cs; c < cs + h->n_config; c++) {
4738                 for (a = 0; a < c->n_blocks; a++)
4739                         if (c->block_list[a] > h->n_blocks) {
4740                                 printk(BAD_FW "bad block ref number in cfgs\n");
4741                                 return -EINVAL;
4742                         }
4743                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4744                         tmp++;
4745         }
4746         if (!tmp) {
4747                 printk(BAD_FW "nothing appropriate\n");
4748                 return -EINVAL;
4749         }
4750
4751         for (b = bs; b < bs + h->n_blocks; b++)
4752                 if (b->file_offset + b->size > len) {
4753                         printk(BAD_FW "bad block data offset\n");
4754                         return -EINVAL;
4755                 }
4756
4757         /* everything is OK, let's seek'n'load it */
4758         for (c = cs; c < cs + h->n_config; c++)
4759                 if (c->mailbox == mailbox && c->function == 0)
4760                         break;
4761
4762         for (a = 0; a < c->n_blocks; a++) {
4763                 b = &bs[c->block_list[a]];
4764                 if (b->type == ZBLOCK_FPGA) {
4765                         if (fpga != NULL)
4766                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4767                                                 b->size);
4768                 } else {
4769                         if (base != NULL)
4770                                 memcpy_toio(base + b->ram_offset,
4771                                                ptr + b->file_offset, b->size);
4772                 }
4773         }
4774 #undef BAD_FW
4775         return 0;
4776 }
4777
4778 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4779                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4780 {
4781         const struct firmware *fw;
4782         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4783         struct CUSTOM_REG __iomem *cust = base_addr;
4784         struct ZFW_CTRL __iomem *pt_zfwctrl;
4785         void __iomem *tmp;
4786         u32 mailbox, status;
4787         unsigned int i;
4788         int retval;
4789
4790         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4791         if (retval) {
4792                 dev_err(&pdev->dev, "can't get firmware\n");
4793                 goto err;
4794         }
4795
4796         /* Check whether the firmware is already loaded and running. If
4797            positive, skip this board */
4798         if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4799                 u32 cntval = readl(base_addr + 0x190);
4800
4801                 udelay(100);
4802                 if (cntval != readl(base_addr + 0x190)) {
4803                         /* FW counter is working, FW is running */
4804                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4805                                         "Skipping board.\n");
4806                         retval = 0;
4807                         goto err_rel;
4808                 }
4809         }
4810
4811         /* start boot */
4812         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4813                         ~0x00030800UL);
4814
4815         mailbox = readl(&ctl_addr->mail_box_0);
4816
4817         if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4818                 /* stops CPU and set window to beginning of RAM */
4819                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4820                 cy_writel(&cust->cpu_stop, 0);
4821                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4822                 udelay(100);
4823         }
4824
4825         plx_init(pdev, irq, ctl_addr);
4826
4827         if (mailbox != 0) {
4828                 /* load FPGA */
4829                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4830                                 base_addr);
4831                 if (retval)
4832                         goto err_rel;
4833                 if (!Z_FPGA_LOADED(ctl_addr)) {
4834                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4835                                         "not loaded\n");
4836                         goto err_rel;
4837                 }
4838         }
4839
4840         /* stops CPU and set window to beginning of RAM */
4841         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4842         cy_writel(&cust->cpu_stop, 0);
4843         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4844         udelay(100);
4845
4846         /* clear memory */
4847         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4848                 cy_writeb(tmp, 255);
4849         if (mailbox != 0) {
4850                 /* set window to last 512K of RAM */
4851                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4852                 //sleep(1);
4853                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4854                         cy_writeb(tmp, 255);
4855                 /* set window to beginning of RAM */
4856                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4857                 //sleep(1);
4858         }
4859
4860         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4861         release_firmware(fw);
4862         if (retval)
4863                 goto err;
4864
4865         /* finish boot and start boards */
4866         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4867         cy_writel(&cust->cpu_start, 0);
4868         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4869         i = 0;
4870         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4871                 msleep(100);
4872         if (status != ZFIRM_ID) {
4873                 if (status == ZFIRM_HLT) {
4874                         dev_err(&pdev->dev, "you need an external power supply "
4875                                 "for this number of ports. Firmware halted and "
4876                                 "board reset.\n");
4877                         retval = -EIO;
4878                         goto err;
4879                 }
4880                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4881                                 "some more time\n", status);
4882                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4883                                 i++ < 200)
4884                         msleep(100);
4885                 if (status != ZFIRM_ID) {
4886                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4887                                         "Giving up. (fid->signature = 0x%x)\n",
4888                                         status);
4889                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4890                                 "upgrading the FW, please power cycle the "
4891                                 "system before loading the new FW to the "
4892                                 "Cyclades-Z.\n");
4893
4894                         if (Z_FPGA_LOADED(ctl_addr))
4895                                 plx_init(pdev, irq, ctl_addr);
4896
4897                         retval = -EIO;
4898                         goto err;
4899                 }
4900                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4901                                 i / 10);
4902         }
4903         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4904
4905         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4906                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4907                         base_addr + readl(&fid->zfwctrl_addr));
4908
4909         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4910                 readl(&pt_zfwctrl->board_ctrl.fw_version),
4911                 readl(&pt_zfwctrl->board_ctrl.n_channel));
4912
4913         if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4914                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4915                         "check the connection between the Z host card and the "
4916                         "serial expanders.\n");
4917
4918                 if (Z_FPGA_LOADED(ctl_addr))
4919                         plx_init(pdev, irq, ctl_addr);
4920
4921                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4922                                 "reset.\n");
4923                 retval = 0;
4924                 goto err;
4925         }
4926
4927         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4928         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4929
4930         /*
4931            Early firmware failed to start looking for commands.
4932            This enables firmware interrupts for those commands.
4933          */
4934         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4935                         (1 << 17));
4936         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4937                         0x00030800UL);
4938
4939         plx_init(pdev, irq, ctl_addr);
4940
4941         return 0;
4942 err_rel:
4943         release_firmware(fw);
4944 err:
4945         return retval;
4946 }
4947
4948 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4949                 const struct pci_device_id *ent)
4950 {
4951         void __iomem *addr0 = NULL, *addr2 = NULL;
4952         char *card_name = NULL;
4953         u32 mailbox;
4954         unsigned int device_id, nchan = 0, card_no, i;
4955         unsigned char plx_ver;
4956         int retval, irq;
4957
4958         retval = pci_enable_device(pdev);
4959         if (retval) {
4960                 dev_err(&pdev->dev, "cannot enable device\n");
4961                 goto err;
4962         }
4963
4964         /* read PCI configuration area */
4965         irq = pdev->irq;
4966         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4967
4968 #if defined(__alpha__)
4969         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4970                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4971                         "addresses on Alpha systems.\n");
4972                 retval = -EIO;
4973                 goto err_dis;
4974         }
4975 #endif
4976         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4977                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4978                         "addresses\n");
4979                 retval = -EIO;
4980                 goto err_dis;
4981         }
4982
4983         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4984                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4985                                 "it...\n");
4986                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4987         }
4988
4989         retval = pci_request_regions(pdev, "cyclades");
4990         if (retval) {
4991                 dev_err(&pdev->dev, "failed to reserve resources\n");
4992                 goto err_dis;
4993         }
4994
4995         retval = -EIO;
4996         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4997                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4998                 card_name = "Cyclom-Y";
4999
5000                 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5001                 if (addr0 == NULL) {
5002                         dev_err(&pdev->dev, "can't remap ctl region\n");
5003                         goto err_reg;
5004                 }
5005                 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5006                 if (addr2 == NULL) {
5007                         dev_err(&pdev->dev, "can't remap base region\n");
5008                         goto err_unmap;
5009                 }
5010
5011                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5012                 if (nchan == 0) {
5013                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5014                                         "Serial-Modules\n");
5015                         return -EIO;
5016                 }
5017         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5018                 struct RUNTIME_9060 __iomem *ctl_addr;
5019
5020                 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5021                 if (addr0 == NULL) {
5022                         dev_err(&pdev->dev, "can't remap ctl region\n");
5023                         goto err_reg;
5024                 }
5025
5026                 /* Disable interrupts on the PLX before resetting it */
5027                 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5028
5029                 plx_init(pdev, irq, addr0);
5030
5031                 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5032
5033                 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5034                                 CyPCI_Ze_win : CyPCI_Zwin);
5035                 if (addr2 == NULL) {
5036                         dev_err(&pdev->dev, "can't remap base region\n");
5037                         goto err_unmap;
5038                 }
5039
5040                 if (mailbox == ZE_V1) {
5041                         card_name = "Cyclades-Ze";
5042
5043                         readl(&ctl_addr->mail_box_0);
5044                         nchan = ZE_V1_NPORTS;
5045                 } else {
5046                         card_name = "Cyclades-8Zo";
5047
5048 #ifdef CY_PCI_DEBUG
5049                         if (mailbox == ZO_V1) {
5050                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5051                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5052                                         "id %lx, ver %lx\n", (ulong)(0xff &
5053                                         readl(&((struct CUSTOM_REG *)addr2)->
5054                                                 fpga_id)), (ulong)(0xff &
5055                                         readl(&((struct CUSTOM_REG *)addr2)->
5056                                                 fpga_version)));
5057                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5058                         } else {
5059                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5060                                         "Cyclades-Z board.  FPGA not loaded\n");
5061                         }
5062 #endif
5063                         /* The following clears the firmware id word.  This
5064                            ensures that the driver will not attempt to talk to
5065                            the board until it has been properly initialized.
5066                          */
5067                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5068                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5069
5070                         retval = cyz_load_fw(pdev, addr2, addr0, irq);
5071                         if (retval)
5072                                 goto err_unmap;
5073                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5074                            version will have a different device_id and will
5075                            be allocated its maximum number of ports. */
5076                         nchan = 8;
5077                 }
5078         }
5079
5080         if ((cy_next_channel + nchan) > NR_PORTS) {
5081                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5082                         "channels are available. Change NR_PORTS in "
5083                         "cyclades.c and recompile kernel.\n");
5084                 goto err_unmap;
5085         }
5086         /* fill the next cy_card structure available */
5087         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5088                 if (cy_card[card_no].base_addr == NULL)
5089                         break;
5090         }
5091         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5092                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5093                         "more cards can be used. Change NR_CARDS in "
5094                         "cyclades.c and recompile kernel.\n");
5095                 goto err_unmap;
5096         }
5097
5098         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5099                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5100                 /* allocate IRQ */
5101                 retval = request_irq(irq, cyy_interrupt,
5102                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5103                 if (retval) {
5104                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5105                         goto err_unmap;
5106                 }
5107                 cy_card[card_no].num_chips = nchan / 4;
5108         } else {
5109 #ifdef CONFIG_CYZ_INTR
5110                 /* allocate IRQ only if board has an IRQ */
5111                 if (irq != 0 && irq != 255) {
5112                         retval = request_irq(irq, cyz_interrupt,
5113                                         IRQF_SHARED, "Cyclades-Z",
5114                                         &cy_card[card_no]);
5115                         if (retval) {
5116                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5117                                 goto err_unmap;
5118                         }
5119                 }
5120 #endif                          /* CONFIG_CYZ_INTR */
5121                 cy_card[card_no].num_chips = (unsigned int)-1;
5122         }
5123
5124         /* set cy_card */
5125         cy_card[card_no].base_addr = addr2;
5126         cy_card[card_no].ctl_addr = addr0;
5127         cy_card[card_no].irq = irq;
5128         cy_card[card_no].bus_index = 1;
5129         cy_card[card_no].first_line = cy_next_channel;
5130         retval = cy_init_card(&cy_card[card_no]);
5131         if (retval)
5132                 goto err_null;
5133
5134         pci_set_drvdata(pdev, &cy_card[card_no]);
5135
5136         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5137                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5138                 /* enable interrupts in the PCI interface */
5139                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5140                 switch (plx_ver) {
5141                 case PLX_9050:
5142
5143                         cy_writeb(addr0 + 0x4c, 0x43);
5144                         break;
5145
5146                 case PLX_9060:
5147                 case PLX_9080:
5148                 default:        /* Old boards, use PLX_9060 */
5149                         plx_init(pdev, irq, addr0);
5150                         cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5151                         break;
5152                 }
5153         }
5154
5155         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5156                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5157         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5158                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5159         cy_next_channel += nchan;
5160
5161         return 0;
5162 err_null:
5163         cy_card[card_no].base_addr = NULL;
5164         free_irq(irq, &cy_card[card_no]);
5165 err_unmap:
5166         pci_iounmap(pdev, addr0);
5167         if (addr2)
5168                 pci_iounmap(pdev, addr2);
5169 err_reg:
5170         pci_release_regions(pdev);
5171 err_dis:
5172         pci_disable_device(pdev);
5173 err:
5174         return retval;
5175 }
5176
5177 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5178 {
5179         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5180         unsigned int i;
5181
5182         /* non-Z with old PLX */
5183         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5184                         PLX_9050)
5185                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5186         else
5187 #ifndef CONFIG_CYZ_INTR
5188                 if (!IS_CYC_Z(*cinfo))
5189 #endif
5190                 cy_writew(cinfo->ctl_addr + 0x68,
5191                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5192
5193         pci_iounmap(pdev, cinfo->base_addr);
5194         if (cinfo->ctl_addr)
5195                 pci_iounmap(pdev, cinfo->ctl_addr);
5196         if (cinfo->irq
5197 #ifndef CONFIG_CYZ_INTR
5198                 && !IS_CYC_Z(*cinfo)
5199 #endif /* CONFIG_CYZ_INTR */
5200                 )
5201                 free_irq(cinfo->irq, cinfo);
5202         pci_release_regions(pdev);
5203
5204         cinfo->base_addr = NULL;
5205         for (i = cinfo->first_line; i < cinfo->first_line +
5206                         cinfo->nports; i++)
5207                 tty_unregister_device(cy_serial_driver, i);
5208         cinfo->nports = 0;
5209         kfree(cinfo->ports);
5210 }
5211
5212 static struct pci_driver cy_pci_driver = {
5213         .name = "cyclades",
5214         .id_table = cy_pci_dev_id,
5215         .probe = cy_pci_probe,
5216         .remove = __devexit_p(cy_pci_remove)
5217 };
5218 #endif
5219
5220 static int
5221 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5222                 int *eof, void *data)
5223 {
5224         struct cyclades_port *info;
5225         unsigned int i, j;
5226         int len = 0;
5227         off_t begin = 0;
5228         off_t pos = 0;
5229         int size;
5230         __u32 cur_jifs = jiffies;
5231
5232         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5233                         "IdleIn  Overruns  Ldisc\n");
5234
5235         pos += size;
5236         len += size;
5237
5238         /* Output one line for each known port */
5239         for (i = 0; i < NR_CARDS; i++)
5240                 for (j = 0; j < cy_card[i].nports; j++) {
5241                         info = &cy_card[i].ports[j];
5242
5243                         if (info->count)
5244                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5245                                         "%10lu %8lu %9lu %6ld\n", info->line,
5246                                         (cur_jifs - info->idle_stats.in_use) /
5247                                         HZ, info->idle_stats.xmit_bytes,
5248                                         (cur_jifs - info->idle_stats.xmit_idle)/
5249                                         HZ, info->idle_stats.recv_bytes,
5250                                         (cur_jifs - info->idle_stats.recv_idle)/
5251                                         HZ, info->idle_stats.overruns,
5252                                         (long)info->tty->ldisc.num);
5253                         else
5254                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5255                                         "%10lu %8lu %9lu %6ld\n",
5256                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5257                         len += size;
5258                         pos = begin + len;
5259
5260                         if (pos < offset) {
5261                                 len = 0;
5262                                 begin = pos;
5263                         }
5264                         if (pos > offset + length)
5265                                 goto done;
5266                 }
5267         *eof = 1;
5268 done:
5269         *start = buf + (offset - begin);        /* Start of wanted data */
5270         len -= (offset - begin);        /* Start slop */
5271         if (len > length)
5272                 len = length;   /* Ending slop */
5273         if (len < 0)
5274                 len = 0;
5275         return len;
5276 }
5277
5278 /* The serial driver boot-time initialization code!
5279     Hardware I/O ports are mapped to character special devices on a
5280     first found, first allocated manner.  That is, this code searches
5281     for Cyclom cards in the system.  As each is found, it is probed
5282     to discover how many chips (and thus how many ports) are present.
5283     These ports are mapped to the tty ports 32 and upward in monotonic
5284     fashion.  If an 8-port card is replaced with a 16-port card, the
5285     port mapping on a following card will shift.
5286
5287     This approach is different from what is used in the other serial
5288     device driver because the Cyclom is more properly a multiplexer,
5289     not just an aggregation of serial ports on one card.
5290
5291     If there are more cards with more ports than have been
5292     statically allocated above, a warning is printed and the
5293     extra ports are ignored.
5294  */
5295
5296 static const struct tty_operations cy_ops = {
5297         .open = cy_open,
5298         .close = cy_close,
5299         .write = cy_write,
5300         .put_char = cy_put_char,
5301         .flush_chars = cy_flush_chars,
5302         .write_room = cy_write_room,
5303         .chars_in_buffer = cy_chars_in_buffer,
5304         .flush_buffer = cy_flush_buffer,
5305         .ioctl = cy_ioctl,
5306         .throttle = cy_throttle,
5307         .unthrottle = cy_unthrottle,
5308         .set_termios = cy_set_termios,
5309         .stop = cy_stop,
5310         .start = cy_start,
5311         .hangup = cy_hangup,
5312         .break_ctl = cy_break,
5313         .wait_until_sent = cy_wait_until_sent,
5314         .read_proc = cyclades_get_proc_info,
5315         .tiocmget = cy_tiocmget,
5316         .tiocmset = cy_tiocmset,
5317 };
5318
5319 static int __init cy_init(void)
5320 {
5321         unsigned int nboards;
5322         int retval = -ENOMEM;
5323
5324         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5325         if (!cy_serial_driver)
5326                 goto err;
5327
5328         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5329                         __DATE__, __TIME__);
5330
5331         /* Initialize the tty_driver structure */
5332
5333         cy_serial_driver->owner = THIS_MODULE;
5334         cy_serial_driver->driver_name = "cyclades";
5335         cy_serial_driver->name = "ttyC";
5336         cy_serial_driver->major = CYCLADES_MAJOR;
5337         cy_serial_driver->minor_start = 0;
5338         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5339         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5340         cy_serial_driver->init_termios = tty_std_termios;
5341         cy_serial_driver->init_termios.c_cflag =
5342             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5343         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5344         tty_set_operations(cy_serial_driver, &cy_ops);
5345
5346         retval = tty_register_driver(cy_serial_driver);
5347         if (retval) {
5348                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5349                 goto err_frtty;
5350         }
5351
5352         /* the code below is responsible to find the boards. Each different
5353            type of board has its own detection routine. If a board is found,
5354            the next cy_card structure available is set by the detection
5355            routine. These functions are responsible for checking the
5356            availability of cy_card and cy_port data structures and updating
5357            the cy_next_channel. */
5358
5359         /* look for isa boards */
5360         nboards = cy_detect_isa();
5361
5362 #ifdef CONFIG_PCI
5363         /* look for pci boards */
5364         retval = pci_register_driver(&cy_pci_driver);
5365         if (retval && !nboards)
5366                 goto err_unr;
5367 #endif
5368
5369         return 0;
5370 err_unr:
5371         tty_unregister_driver(cy_serial_driver);
5372 err_frtty:
5373         put_tty_driver(cy_serial_driver);
5374 err:
5375         return retval;
5376 }                               /* cy_init */
5377
5378 static void __exit cy_cleanup_module(void)
5379 {
5380         struct cyclades_card *card;
5381         unsigned int i, e1;
5382
5383 #ifndef CONFIG_CYZ_INTR
5384         del_timer_sync(&cyz_timerlist);
5385 #endif /* CONFIG_CYZ_INTR */
5386
5387         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5388                 printk(KERN_ERR "failed to unregister Cyclades serial "
5389                                 "driver(%d)\n", e1);
5390
5391 #ifdef CONFIG_PCI
5392         pci_unregister_driver(&cy_pci_driver);
5393 #endif
5394
5395         for (i = 0; i < NR_CARDS; i++) {
5396                 card = &cy_card[i];
5397                 if (card->base_addr) {
5398                         /* clear interrupt */
5399                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5400                         iounmap(card->base_addr);
5401                         if (card->ctl_addr)
5402                                 iounmap(card->ctl_addr);
5403                         if (card->irq
5404 #ifndef CONFIG_CYZ_INTR
5405                                 && !IS_CYC_Z(*card)
5406 #endif /* CONFIG_CYZ_INTR */
5407                                 )
5408                                 free_irq(card->irq, card);
5409                         for (e1 = card->first_line; e1 < card->first_line +
5410                                         card->nports; e1++)
5411                                 tty_unregister_device(cy_serial_driver, e1);
5412                         kfree(card->ports);
5413                 }
5414         }
5415
5416         put_tty_driver(cy_serial_driver);
5417 } /* cy_cleanup_module */
5418
5419 module_init(cy_init);
5420 module_exit(cy_cleanup_module);
5421
5422 MODULE_LICENSE("GPL");
5423 MODULE_VERSION(CY_VERSION);