3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
23 * This version supports shared IRQ's (only for PCI boards).
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
248 * Deleted some debug messages.
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
594 #define CY_VERSION "2.4"
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
609 #define ZE_V1_NPORTS 64
614 #define SERIAL_PARANOIA_CHECK
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
619 #undef CY_DEBUG_COUNT
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
624 #undef CY_ENABLE_MONITORING
630 #include <linux/module.h>
631 #include <linux/errno.h>
632 #include <linux/signal.h>
633 #include <linux/sched.h>
634 #include <linux/timer.h>
635 #include <linux/interrupt.h>
636 #include <linux/tty.h>
637 #include <linux/tty_flip.h>
638 #include <linux/serial.h>
639 #include <linux/major.h>
640 #include <linux/string.h>
641 #include <linux/fcntl.h>
642 #include <linux/ptrace.h>
643 #include <linux/cyclades.h>
644 #include <linux/mm.h>
645 #include <linux/ioport.h>
646 #include <linux/init.h>
647 #include <linux/delay.h>
648 #include <linux/spinlock.h>
649 #include <linux/bitops.h>
651 #include <asm/system.h>
654 #include <asm/uaccess.h>
656 #define CY_LOCK(info,flags) \
658 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
661 #define CY_UNLOCK(info,flags) \
663 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
666 #include <linux/kernel.h>
667 #include <linux/pci.h>
669 #include <linux/stat.h>
670 #include <linux/proc_fs.h>
672 static void cy_throttle(struct tty_struct *tty);
673 static void cy_send_xchar(struct tty_struct *tty, char ch);
675 #define IS_CYC_Z(card) ((card).num_chips == -1)
677 #define Z_FPGA_CHECK(card) \
678 ((readl(&((struct RUNTIME_9060 __iomem *) \
679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
681 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
685 ((card).base_addr+ID_ADDRESS))->signature)))
687 #ifndef SERIAL_XMIT_SIZE
688 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
690 #define WAKEUP_CHARS 256
692 #define STD_COM_FLAGS (0)
694 static struct tty_driver *cy_serial_driver;
697 /* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
706 static unsigned int cy_isa_addresses[] = {
715 0, 0, 0, 0, 0, 0, 0, 0
718 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
721 static long maddr[NR_CARDS] = { 0, };
722 static int irq[NR_CARDS] = { 0, };
724 module_param_array(maddr, long, NULL, 0);
725 module_param_array(irq, int, NULL, 0);
728 #endif /* CONFIG_ISA */
730 /* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
733 static struct cyclades_card cy_card[NR_CARDS];
735 /* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
738 static struct cyclades_port cy_port[NR_PORTS];
740 static int cy_next_channel; /* next minor available */
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
751 static int baud_table[] = {
752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
757 static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
764 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
769 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
777 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
783 static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
800 static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
806 /* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
809 static int cy_chip_offset[] = { 0x0000,
819 /* PCI related definitions */
822 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
823 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
824 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
825 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
831 { } /* end of table */
833 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
836 static void cy_start(struct tty_struct *);
837 static void set_line_char(struct cyclades_port *);
838 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
840 static unsigned detect_isa_irq(void __iomem *);
841 #endif /* CONFIG_ISA */
843 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
845 #ifndef CONFIG_CYZ_INTR
846 static void cyz_poll(unsigned long);
848 /* The Cyclades-Z polling cycle is defined by this variable */
849 static long cyz_polling_cycle = CZ_DEF_POLL;
851 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
853 #else /* CONFIG_CYZ_INTR */
854 static void cyz_rx_restart(unsigned long);
855 static struct timer_list cyz_rx_full_timer[NR_PORTS];
856 #endif /* CONFIG_CYZ_INTR */
858 static inline int serial_paranoia_check(struct cyclades_port *info,
859 char *name, const char *routine)
861 #ifdef SERIAL_PARANOIA_CHECK
863 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
868 if ((long)info < (long)(&cy_port[0]) ||
869 (long)(&cy_port[NR_PORTS]) < (long)info) {
870 printk("cyc Warning: cyclades_port out of range for (%s) in "
871 "%s\n", name, routine);
875 if (info->magic != CYCLADES_MAGIC) {
876 printk("cyc Warning: bad magic number for serial struct (%s) "
877 "in %s\n", name, routine);
882 } /* serial_paranoia_check */
885 * This routine is used by the interrupt handler to schedule
886 * processing in the software interrupt portion of the driver
887 * (also known as the "bottom half"). This can be called any
888 * number of times for any channel without harm.
890 static inline void cy_sched_event(struct cyclades_port *info, int event)
892 info->event |= 1 << event; /* remember what kind of event and who */
893 schedule_work(&info->tqueue);
894 } /* cy_sched_event */
897 * This routine is used to handle the "bottom half" processing for the
898 * serial driver, known also the "software interrupt" processing.
899 * This processing is done at the kernel interrupt level, after the
900 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
901 * is where time-consuming activities which can not be done in the
902 * interrupt driver proper are done; the interrupt driver schedules
903 * them using cy_sched_event(), and they get done here.
905 * This is done through one level of indirection--the task queue.
906 * When a hardware interrupt service routine wants service by the
907 * driver's bottom half, it enqueues the appropriate tq_struct (one
908 * per port) to the keventd work queue and sets a request flag
909 * that the work queue be processed.
911 * Although this may seem unwieldy, it gives the system a way to
912 * pass an argument (in this case the pointer to the cyclades_port
913 * structure) to the bottom half of the driver. Previous kernels
914 * had to poll every port to see if that port needed servicing.
917 do_softint(struct work_struct *work)
919 struct cyclades_port *info =
920 container_of(work, struct cyclades_port, tqueue);
921 struct tty_struct *tty;
927 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
928 tty_hangup(info->tty);
929 wake_up_interruptible(&info->open_wait);
930 info->flags &= ~ASYNC_NORMAL_ACTIVE;
932 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
933 wake_up_interruptible(&info->open_wait);
934 #ifdef CONFIG_CYZ_INTR
935 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
936 if (cyz_rx_full_timer[info->line].function == NULL) {
937 cyz_rx_full_timer[info->line].expires = jiffies + 1;
938 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
939 cyz_rx_full_timer[info->line].data =
941 add_timer(&cyz_rx_full_timer[info->line]);
945 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
946 wake_up_interruptible(&info->delta_msr_wait);
949 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
950 wake_up_interruptible(&info->shutdown_wait);
955 /***********************************************************/
956 /********* Start of block of Cyclom-Y specific code ********/
958 /* This routine waits up to 1000 micro-seconds for the previous
959 command to the Cirrus chip to complete and then issues the
960 new command. An error is returned if the previous command
961 didn't finish within the time limit.
963 This function is only called from inside spinlock-protected code.
965 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
969 /* Check to see that the previous command has completed */
970 for (i = 0; i < 100; i++) {
971 if (readb(base_addr + (CyCCR << index)) == 0) {
976 /* if the CCR never cleared, the previous command
977 didn't finish within the "reasonable time" */
981 /* Issue the new command */
982 cy_writeb(base_addr + (CyCCR << index), cmd);
985 } /* cyy_issue_cmd */
988 /* ISA interrupt detection code */
989 static unsigned detect_isa_irq(void __iomem * address)
992 unsigned long irqs, flags;
993 int save_xir, save_car;
994 int index = 0; /* IRQ probing is only for ISA */
996 /* forget possible initially masked and pending IRQ */
997 irq = probe_irq_off(probe_irq_on());
999 /* Clear interrupts on the board first */
1000 cy_writeb(address + (Cy_ClrIntr << index), 0);
1001 /* Cy_ClrIntr is 0x1800 */
1003 irqs = probe_irq_on();
1007 /* Enable the Tx interrupts on the CD1400 */
1008 local_irq_save(flags);
1009 cy_writeb(address + (CyCAR << index), 0);
1010 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1012 cy_writeb(address + (CyCAR << index), 0);
1013 cy_writeb(address + (CySRER << index),
1014 readb(address + (CySRER << index)) | CyTxRdy);
1015 local_irq_restore(flags);
1020 /* Check which interrupt is in use */
1021 irq = probe_irq_off(irqs);
1024 save_xir = (u_char) readb(address + (CyTIR << index));
1025 save_car = readb(address + (CyCAR << index));
1026 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1027 cy_writeb(address + (CySRER << index),
1028 readb(address + (CySRER << index)) & ~CyTxRdy);
1029 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1030 cy_writeb(address + (CyCAR << index), (save_car));
1031 cy_writeb(address + (Cy_ClrIntr << index), 0);
1032 /* Cy_ClrIntr is 0x1800 */
1034 return (irq > 0) ? irq : 0;
1036 #endif /* CONFIG_ISA */
1038 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1039 void __iomem * base_addr, int status, int index)
1041 struct cyclades_port *info;
1042 struct tty_struct *tty;
1044 int i, j, len, mdm_change, mdm_status, outch;
1045 int save_xir, channel, save_car;
1048 if (status & CySRReceive) { /* reception interrupt */
1049 #ifdef CY_DEBUG_INTERRUPTS
1050 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1052 /* determine the channel & change to that context */
1053 spin_lock(&cinfo->card_lock);
1054 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1055 channel = (u_short) (save_xir & CyIRChannel);
1056 i = channel + chip * 4 + cinfo->first_line;
1058 info->last_active = jiffies;
1059 save_car = readb(base_addr + (CyCAR << index));
1060 cy_writeb(base_addr + (CyCAR << index), save_xir);
1062 /* if there is nowhere to put the data, discard it */
1063 if (info->tty == 0) {
1064 j = (readb(base_addr + (CyRIVR << index)) &
1066 if (j == CyIVRRxEx) { /* exception */
1067 data = readb(base_addr + (CyRDSR << index));
1068 } else { /* normal character reception */
1069 char_count = readb(base_addr +
1071 while (char_count--) {
1072 data = readb(base_addr +
1076 } else { /* there is an open port for this data */
1078 j = (readb(base_addr + (CyRIVR << index)) &
1080 if (j == CyIVRRxEx) { /* exception */
1081 data = readb(base_addr + (CyRDSR << index));
1083 /* For statistics only */
1086 else if (data & CyFRAME)
1087 info->icount.frame++;
1088 else if (data & CyPARITY)
1089 info->icount.parity++;
1090 else if (data & CyOVERRUN)
1091 info->icount.overrun++;
1093 if (data & info->ignore_status_mask) {
1097 if (tty_buffer_request_room(tty, 1)) {
1098 if (data & info->read_status_mask) {
1099 if (data & CyBREAK) {
1100 tty_insert_flip_char(
1112 } else if (data & CyFRAME) {
1113 tty_insert_flip_char(
1123 } else if (data & CyPARITY) {
1124 /* Pieces of seven... */
1125 tty_insert_flip_char(
1135 } else if (data & CyOVERRUN) {
1136 tty_insert_flip_char(
1140 /* If the flip buffer itself is
1141 overflowing, we still lose
1142 the next incoming character.
1144 tty_insert_flip_char(
1154 /* These two conditions may imply */
1155 /* a normal read should be done. */
1156 /* }else if(data & CyTIMEOUT){ */
1157 /* }else if(data & CySPECHAR){ */
1159 tty_insert_flip_char(
1165 tty_insert_flip_char(tty, 0,
1170 /* there was a software buffer
1171 overrun and nothing could be
1173 info->icount.buf_overrun++;
1174 info->idle_stats.overruns++;
1176 } else { /* normal character reception */
1177 /* load # chars available from the chip */
1178 char_count = readb(base_addr +
1181 #ifdef CY_ENABLE_MONITORING
1182 ++info->mon.int_count;
1183 info->mon.char_count += char_count;
1184 if (char_count > info->mon.char_max)
1185 info->mon.char_max = char_count;
1186 info->mon.char_last = char_count;
1188 len = tty_buffer_request_room(tty, char_count);
1190 data = readb(base_addr +
1192 tty_insert_flip_char(tty, data,
1194 info->idle_stats.recv_bytes++;
1200 info->idle_stats.recv_idle = jiffies;
1202 tty_schedule_flip(tty);
1204 /* end of service */
1205 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1206 cy_writeb(base_addr + (CyCAR << index), (save_car));
1207 spin_unlock(&cinfo->card_lock);
1210 if (status & CySRTransmit) { /* transmission interrupt */
1211 /* Since we only get here when the transmit buffer
1212 is empty, we know we can always stuff a dozen
1214 #ifdef CY_DEBUG_INTERRUPTS
1215 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1218 /* determine the channel & change to that context */
1219 spin_lock(&cinfo->card_lock);
1220 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1221 channel = (u_short) (save_xir & CyIRChannel);
1222 i = channel + chip * 4 + cinfo->first_line;
1223 save_car = readb(base_addr + (CyCAR << index));
1224 cy_writeb(base_addr + (CyCAR << index), save_xir);
1226 /* validate the port# (as configured and open) */
1227 if ((i < 0) || (NR_PORTS <= i)) {
1228 cy_writeb(base_addr + (CySRER << index),
1229 readb(base_addr + (CySRER << index)) &
1234 info->last_active = jiffies;
1235 if (info->tty == 0) {
1236 cy_writeb(base_addr + (CySRER << index),
1237 readb(base_addr + (CySRER << index)) &
1242 /* load the on-chip space for outbound data */
1243 char_count = info->xmit_fifo_size;
1245 if (info->x_char) { /* send special char */
1246 outch = info->x_char;
1247 cy_writeb(base_addr + (CyTDR << index), outch);
1253 if (info->breakon || info->breakoff) {
1254 if (info->breakon) {
1255 cy_writeb(base_addr + (CyTDR << index), 0);
1256 cy_writeb(base_addr + (CyTDR << index), 0x81);
1260 if (info->breakoff) {
1261 cy_writeb(base_addr + (CyTDR << index), 0);
1262 cy_writeb(base_addr + (CyTDR << index), 0x83);
1268 while (char_count-- > 0) {
1269 if (!info->xmit_cnt) {
1270 if (readb(base_addr + (CySRER << index)) &
1272 cy_writeb(base_addr + (CySRER << index),
1274 (CySRER << index)) &
1277 cy_writeb(base_addr + (CySRER << index),
1279 (CySRER << index)) &
1280 ~CyTxRdy) | CyTxMpty);
1284 if (info->xmit_buf == 0) {
1285 cy_writeb(base_addr + (CySRER << index),
1286 readb(base_addr + (CySRER << index)) &
1290 if (info->tty->stopped || info->tty->hw_stopped) {
1291 cy_writeb(base_addr + (CySRER << index),
1292 readb(base_addr + (CySRER << index)) &
1296 /* Because the Embedded Transmit Commands have
1297 been enabled, we must check to see if the
1298 escape character, NULL, is being sent. If it
1299 is, we must ensure that there is room for it
1300 to be doubled in the output stream. Therefore
1301 we no longer advance the pointer when the
1302 character is fetched, but rather wait until
1303 after the check for a NULL output character.
1304 This is necessary because there may not be
1305 room for the two chars needed to send a NULL.)
1307 outch = info->xmit_buf[info->xmit_tail];
1310 info->xmit_tail = (info->xmit_tail + 1) &
1311 (SERIAL_XMIT_SIZE - 1);
1312 cy_writeb(base_addr + (CyTDR << index), outch);
1315 if (char_count > 1) {
1317 info->xmit_tail = (info->xmit_tail + 1)&
1318 (SERIAL_XMIT_SIZE - 1);
1319 cy_writeb(base_addr + (CyTDR << index),
1321 cy_writeb(base_addr + (CyTDR << index),
1331 if (info->xmit_cnt < WAKEUP_CHARS) {
1332 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1335 /* end of service */
1336 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1337 cy_writeb(base_addr + (CyCAR << index), (save_car));
1338 spin_unlock(&cinfo->card_lock);
1341 if (status & CySRModem) { /* modem interrupt */
1343 /* determine the channel & change to that context */
1344 spin_lock(&cinfo->card_lock);
1345 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1346 channel = (u_short) (save_xir & CyIRChannel);
1347 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1348 info->last_active = jiffies;
1349 save_car = readb(base_addr + (CyCAR << index));
1350 cy_writeb(base_addr + (CyCAR << index), save_xir);
1352 mdm_change = readb(base_addr + (CyMISR << index));
1353 mdm_status = readb(base_addr + (CyMSVR1 << index));
1355 if (info->tty == 0) { /* no place for data, ignore it */
1358 if (mdm_change & CyANY_DELTA) {
1359 /* For statistics only */
1360 if (mdm_change & CyDCD)
1362 if (mdm_change & CyCTS)
1364 if (mdm_change & CyDSR)
1366 if (mdm_change & CyRI)
1369 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1372 if ((mdm_change & CyDCD) &&
1373 (info->flags & ASYNC_CHECK_CD)) {
1374 if (mdm_status & CyDCD) {
1375 cy_sched_event(info,
1376 Cy_EVENT_OPEN_WAKEUP);
1378 cy_sched_event(info, Cy_EVENT_HANGUP);
1381 if ((mdm_change & CyCTS) &&
1382 (info->flags & ASYNC_CTS_FLOW)) {
1383 if (info->tty->hw_stopped) {
1384 if (mdm_status & CyCTS) {
1385 /* cy_start isn't used
1387 info->tty->hw_stopped = 0;
1388 cy_writeb(base_addr +
1394 cy_sched_event(info,
1395 Cy_EVENT_WRITE_WAKEUP);
1398 if (!(mdm_status & CyCTS)) {
1399 /* cy_stop isn't used
1401 info->tty->hw_stopped = 1;
1402 cy_writeb(base_addr +
1411 if (mdm_change & CyDSR) {
1413 if (mdm_change & CyRI) {
1416 /* end of service */
1417 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1418 cy_writeb(base_addr + (CyCAR << index), save_car);
1419 spin_unlock(&cinfo->card_lock);
1423 /* The real interrupt service routine is called
1424 whenever the card wants its hand held--chars
1425 received, out buffer empty, modem change, etc.
1427 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1430 struct cyclades_card *cinfo;
1431 void __iomem *base_addr, *card_base_addr;
1437 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1438 #ifdef CY_DEBUG_INTERRUPTS
1439 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1441 return IRQ_NONE; /* spurious interrupt */
1444 card_base_addr = cinfo->base_addr;
1445 index = cinfo->bus_index;
1447 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1448 if (unlikely(card_base_addr == NULL))
1451 /* This loop checks all chips in the card. Make a note whenever
1452 _any_ chip had some work to do, as this is considered an
1453 indication that there will be more to do. Only when no chip
1454 has any work does this outermost loop exit.
1458 for (chip = 0; chip < cinfo->num_chips; chip++) {
1459 base_addr = cinfo->base_addr +
1460 (cy_chip_offset[chip] << index);
1462 while ((status = readb(base_addr +
1463 (CySVRR << index))) != 0x00) {
1465 /* The purpose of the following test is to ensure that
1466 no chip can monopolize the driver. This forces the
1467 chips to be checked in a round-robin fashion (after
1468 draining each of a bunch (1000) of characters).
1470 if (1000 < too_many++) {
1473 cyy_intr_chip(cinfo, chip, base_addr, status,
1479 /* clear interrupts */
1480 spin_lock(&cinfo->card_lock);
1481 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1482 /* Cy_ClrIntr is 0x1800 */
1483 spin_unlock(&cinfo->card_lock);
1485 } /* cyy_interrupt */
1487 /***********************************************************/
1488 /********* End of block of Cyclom-Y specific code **********/
1489 /******** Start of block of Cyclades-Z specific code *********/
1490 /***********************************************************/
1493 cyz_fetch_msg(struct cyclades_card *cinfo,
1494 __u32 * channel, __u8 * cmd, __u32 * param)
1496 struct FIRM_ID __iomem *firm_id;
1497 struct ZFW_CTRL __iomem *zfw_ctrl;
1498 struct BOARD_CTRL __iomem *board_ctrl;
1499 unsigned long loc_doorbell;
1501 firm_id = cinfo->base_addr + ID_ADDRESS;
1502 if (!ISZLOADED(*cinfo)) {
1505 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1506 board_ctrl = &zfw_ctrl->board_ctrl;
1508 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1509 (cinfo->ctl_addr))->loc_doorbell);
1511 *cmd = (char)(0xff & loc_doorbell);
1512 *channel = readl(&board_ctrl->fwcmd_channel);
1513 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1514 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1515 loc_doorbell, 0xffffffff);
1519 } /* cyz_fetch_msg */
1522 cyz_issue_cmd(struct cyclades_card *cinfo,
1523 __u32 channel, __u8 cmd, __u32 param)
1525 struct FIRM_ID __iomem *firm_id;
1526 struct ZFW_CTRL __iomem *zfw_ctrl;
1527 struct BOARD_CTRL __iomem *board_ctrl;
1528 __u32 __iomem *pci_doorbell;
1531 firm_id = cinfo->base_addr + ID_ADDRESS;
1532 if (!ISZLOADED(*cinfo)) {
1535 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1536 board_ctrl = &zfw_ctrl->board_ctrl;
1540 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1541 while ((readl(pci_doorbell) & 0xff) != 0) {
1542 if (index++ == 1000) {
1543 return (int)(readl(pci_doorbell) & 0xff);
1547 cy_writel(&board_ctrl->hcmd_channel, channel);
1548 cy_writel(&board_ctrl->hcmd_param, param);
1549 cy_writel(pci_doorbell, (long)cmd);
1552 } /* cyz_issue_cmd */
1555 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1556 struct BUF_CTRL __iomem *buf_ctrl)
1558 struct cyclades_card *cinfo = &cy_card[info->card];
1559 struct tty_struct *tty = info->tty;
1567 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1569 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1570 rx_put = readl(&buf_ctrl->rx_put);
1571 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1572 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1573 if (rx_put >= rx_get)
1574 char_count = rx_put - rx_get;
1576 char_count = rx_put - rx_get + rx_bufsize;
1579 info->last_active = jiffies;
1580 info->jiffies[1] = jiffies;
1582 #ifdef CY_ENABLE_MONITORING
1583 info->mon.int_count++;
1584 info->mon.char_count += char_count;
1585 if (char_count > info->mon.char_max)
1586 info->mon.char_max = char_count;
1587 info->mon.char_last = char_count;
1590 /* flush received characters */
1591 new_rx_get = (new_rx_get + char_count) &
1593 info->rflush_count++;
1596 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1597 for performance, but because of buffer boundaries, there
1598 may be several steps to the operation */
1599 while (0 < (small_count = min_t(unsigned int,
1600 rx_bufsize - new_rx_get,
1601 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1602 tty->flip.count, char_count)))){
1603 memcpy_fromio(tty->flip.char_buf_ptr,
1604 (char *)(cinfo->base_addr + rx_bufaddr +
1608 tty->flip.char_buf_ptr += small_count;
1609 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1611 tty->flip.flag_buf_ptr += small_count;
1612 new_rx_get = (new_rx_get + small_count) &
1614 char_count -= small_count;
1615 info->icount.rx += small_count;
1616 info->idle_stats.recv_bytes += small_count;
1617 tty->flip.count += small_count;
1620 len = tty_buffer_request_room(tty, char_count);
1622 data = readb(cinfo->base_addr + rx_bufaddr +
1624 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1625 tty_insert_flip_char(tty, data, TTY_NORMAL);
1626 info->idle_stats.recv_bytes++;
1630 #ifdef CONFIG_CYZ_INTR
1631 /* Recalculate the number of chars in the RX buffer and issue
1632 a cmd in case it's higher than the RX high water mark */
1633 rx_put = readl(&buf_ctrl->rx_put);
1634 if (rx_put >= rx_get)
1635 char_count = rx_put - rx_get;
1637 char_count = rx_put - rx_get + rx_bufsize;
1638 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1639 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1642 info->idle_stats.recv_idle = jiffies;
1643 tty_schedule_flip(tty);
1646 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1651 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1652 struct BUF_CTRL __iomem *buf_ctrl)
1654 struct cyclades_card *cinfo = &cy_card[info->card];
1655 struct tty_struct *tty = info->tty;
1661 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1663 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1666 tx_get = readl(&buf_ctrl->tx_get);
1667 tx_put = readl(&buf_ctrl->tx_put);
1668 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1669 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1670 if (tx_put >= tx_get)
1671 char_count = tx_get - tx_put - 1 + tx_bufsize;
1673 char_count = tx_get - tx_put - 1;
1681 if (info->x_char) { /* send special char */
1682 data = info->x_char;
1684 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1685 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1689 info->last_active = jiffies;
1690 info->jiffies[2] = jiffies;
1693 while (0 < (small_count = min_t(unsigned int,
1694 tx_bufsize - tx_put, min_t(unsigned int,
1695 (SERIAL_XMIT_SIZE - info->xmit_tail),
1696 min_t(unsigned int, info->xmit_cnt,
1699 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1701 &info->xmit_buf[info->xmit_tail],
1704 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1705 char_count -= small_count;
1706 info->icount.tx += small_count;
1707 info->xmit_cnt -= small_count;
1708 info->xmit_tail = (info->xmit_tail + small_count) &
1709 (SERIAL_XMIT_SIZE - 1);
1710 info->last_active = jiffies;
1711 info->jiffies[2] = jiffies;
1714 while (info->xmit_cnt && char_count) {
1715 data = info->xmit_buf[info->xmit_tail];
1717 info->xmit_tail = (info->xmit_tail + 1) &
1718 (SERIAL_XMIT_SIZE - 1);
1720 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1721 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1724 info->last_active = jiffies;
1725 info->jiffies[2] = jiffies;
1729 if (info->xmit_cnt < WAKEUP_CHARS) {
1730 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1733 cy_writel(&buf_ctrl->tx_put, tx_put);
1737 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1739 struct tty_struct *tty;
1740 struct cyclades_port *info;
1741 static struct FIRM_ID __iomem *firm_id;
1742 static struct ZFW_CTRL __iomem *zfw_ctrl;
1743 static struct BOARD_CTRL __iomem *board_ctrl;
1744 static struct CH_CTRL __iomem *ch_ctrl;
1745 static struct BUF_CTRL __iomem *buf_ctrl;
1749 __u32 hw_ver, fw_ver;
1753 firm_id = cinfo->base_addr + ID_ADDRESS;
1754 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1755 board_ctrl = &zfw_ctrl->board_ctrl;
1756 fw_ver = readl(&board_ctrl->fw_version);
1757 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1760 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1763 info = &cy_port[channel + cinfo->first_line];
1764 if ((tty = info->tty) == 0) {
1767 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1768 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1772 tty_insert_flip_char(tty, 0, TTY_PARITY);
1777 tty_insert_flip_char(tty, 0, TTY_FRAME);
1782 tty_insert_flip_char(tty, 0, TTY_BREAK);
1789 if (info->flags & ASYNC_CHECK_CD) {
1790 if ((fw_ver > 241 ? ((u_long) param) :
1791 readl(&ch_ctrl->rs_status)) &
1793 cy_sched_event(info,
1794 Cy_EVENT_OPEN_WAKEUP);
1796 cy_sched_event(info, Cy_EVENT_HANGUP);
1814 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1817 #ifdef CONFIG_CYZ_INTR
1821 /* Reception Interrupt */
1822 #ifdef CY_DEBUG_INTERRUPTS
1823 printk("cyz_interrupt: rcvd intr, card %d, "
1824 "port %ld\n\r", info->card, channel);
1826 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1831 /* Transmission Interrupt */
1832 #ifdef CY_DEBUG_INTERRUPTS
1833 printk("cyz_interrupt: xmit intr, card %d, "
1834 "port %ld\n\r", info->card, channel);
1836 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1838 #endif /* CONFIG_CYZ_INTR */
1840 /* should do something with this !!! */
1846 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1848 tty_schedule_flip(tty);
1852 #ifdef CONFIG_CYZ_INTR
1853 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1855 struct cyclades_card *cinfo;
1857 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1858 #ifdef CY_DEBUG_INTERRUPTS
1859 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1861 return IRQ_NONE; /* spurious interrupt */
1864 if (!ISZLOADED(*cinfo)) {
1865 #ifdef CY_DEBUG_INTERRUPTS
1866 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1871 /* Handle the interrupts */
1872 cyz_handle_cmd(cinfo);
1875 } /* cyz_interrupt */
1877 static void cyz_rx_restart(unsigned long arg)
1879 struct cyclades_port *info = (struct cyclades_port *)arg;
1881 int card = info->card;
1882 __u32 channel = (info->line) - (cy_card[card].first_line);
1883 unsigned long flags;
1885 CY_LOCK(info, flags);
1886 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1888 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1889 info->line, retval);
1891 cyz_rx_full_timer[info->line].function = NULL;
1892 CY_UNLOCK(info, flags);
1895 #else /* CONFIG_CYZ_INTR */
1897 static void cyz_poll(unsigned long arg)
1899 struct cyclades_card *cinfo;
1900 struct cyclades_port *info;
1901 struct tty_struct *tty;
1902 static struct FIRM_ID *firm_id;
1903 static struct ZFW_CTRL *zfw_ctrl;
1904 static struct BOARD_CTRL *board_ctrl;
1905 static struct CH_CTRL *ch_ctrl;
1906 static struct BUF_CTRL *buf_ctrl;
1907 unsigned long expires = jiffies + HZ;
1910 for (card = 0; card < NR_CARDS; card++) {
1911 cinfo = &cy_card[card];
1913 if (!IS_CYC_Z(*cinfo))
1915 if (!ISZLOADED(*cinfo))
1918 firm_id = cinfo->base_addr + ID_ADDRESS;
1919 zfw_ctrl = cinfo->base_addr +
1920 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1921 board_ctrl = &(zfw_ctrl->board_ctrl);
1923 /* Skip first polling cycle to avoid racing conditions with the FW */
1924 if (!cinfo->intr_enabled) {
1925 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1926 cinfo->intr_enabled = 1;
1930 cyz_handle_cmd(cinfo);
1932 for (port = 0; port < cinfo->nports; port++) {
1933 info = &cy_port[port + cinfo->first_line];
1935 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1936 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1938 if (!info->throttle)
1939 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1940 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1942 /* poll every 'cyz_polling_cycle' period */
1943 expires = jiffies + cyz_polling_cycle;
1945 mod_timer(&cyz_timerlist, expires);
1948 #endif /* CONFIG_CYZ_INTR */
1950 /********** End of block of Cyclades-Z specific code *********/
1951 /***********************************************************/
1953 /* This is called whenever a port becomes active;
1954 interrupts are enabled and DTR & RTS are turned on.
1956 static int startup(struct cyclades_port *info)
1958 unsigned long flags;
1960 void __iomem *base_addr;
1961 int card, chip, channel, index;
1965 channel = (info->line) - (cy_card[card].first_line);
1967 page = get_zeroed_page(GFP_KERNEL);
1971 CY_LOCK(info, flags);
1973 if (info->flags & ASYNC_INITIALIZED) {
1980 set_bit(TTY_IO_ERROR, &info->tty->flags);
1989 info->xmit_buf = (unsigned char *)page;
1991 CY_UNLOCK(info, flags);
1993 set_line_char(info);
1995 if (!IS_CYC_Z(cy_card[card])) {
1996 chip = channel >> 2;
1998 index = cy_card[card].bus_index;
1999 base_addr = cy_card[card].base_addr +
2000 (cy_chip_offset[chip] << index);
2002 #ifdef CY_DEBUG_OPEN
2003 printk("cyc startup card %d, chip %d, channel %d, "
2005 card, chip, channel, (long)base_addr);
2008 CY_LOCK(info, flags);
2010 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2012 cy_writeb(base_addr + (CyRTPR << index),
2013 (info->default_timeout ? info->default_timeout : 0x02));
2014 /* 10ms rx timeout */
2016 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2019 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2020 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2021 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2024 printk("cyc:startup raising DTR\n");
2025 printk(" status: 0x%x, 0x%x\n",
2026 readb(base_addr + (CyMSVR1 << index)),
2027 readb(base_addr + (CyMSVR2 << index)));
2030 cy_writeb(base_addr + (CySRER << index),
2031 readb(base_addr + (CySRER << index)) | CyRxData);
2032 info->flags |= ASYNC_INITIALIZED;
2035 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2037 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2038 info->breakon = info->breakoff = 0;
2039 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2040 info->idle_stats.in_use =
2041 info->idle_stats.recv_idle =
2042 info->idle_stats.xmit_idle = jiffies;
2044 CY_UNLOCK(info, flags);
2047 struct FIRM_ID __iomem *firm_id;
2048 struct ZFW_CTRL __iomem *zfw_ctrl;
2049 struct BOARD_CTRL __iomem *board_ctrl;
2050 struct CH_CTRL __iomem *ch_ctrl;
2053 base_addr = cy_card[card].base_addr;
2055 firm_id = base_addr + ID_ADDRESS;
2056 if (!ISZLOADED(cy_card[card])) {
2060 zfw_ctrl = cy_card[card].base_addr +
2061 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2062 board_ctrl = &zfw_ctrl->board_ctrl;
2063 ch_ctrl = zfw_ctrl->ch_ctrl;
2065 #ifdef CY_DEBUG_OPEN
2066 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2067 card, channel, (long)base_addr);
2070 CY_LOCK(info, flags);
2072 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2074 #ifdef CONFIG_CYZ_INTR
2075 cy_writel(&ch_ctrl[channel].intr_enable,
2076 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2077 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2079 cy_writel(&ch_ctrl[channel].intr_enable,
2080 C_IN_IOCTLW | C_IN_MDCD);
2081 #endif /* CONFIG_CYZ_INTR */
2083 #ifdef CONFIG_CYZ_INTR
2084 cy_writel(&ch_ctrl[channel].intr_enable,
2085 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2086 C_IN_RXNNDT | C_IN_MDCD);
2088 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2089 #endif /* CONFIG_CYZ_INTR */
2092 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2094 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2095 info->line, retval);
2098 /* Flush RX buffers before raising DTR and RTS */
2099 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2102 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2103 info->line, retval);
2106 /* set timeout !!! */
2107 /* set RTS and DTR !!! */
2108 cy_writel(&ch_ctrl[channel].rs_control,
2109 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2111 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2114 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2115 info->line, retval);
2118 printk("cyc:startup raising Z DTR\n");
2121 /* enable send, recv, modem !!! */
2123 info->flags |= ASYNC_INITIALIZED;
2125 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2127 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2128 info->breakon = info->breakoff = 0;
2129 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2130 info->idle_stats.in_use =
2131 info->idle_stats.recv_idle =
2132 info->idle_stats.xmit_idle = jiffies;
2134 CY_UNLOCK(info, flags);
2137 #ifdef CY_DEBUG_OPEN
2138 printk(" cyc startup done\n");
2143 CY_UNLOCK(info, flags);
2147 static void start_xmit(struct cyclades_port *info)
2149 unsigned long flags;
2150 void __iomem *base_addr;
2151 int card, chip, channel, index;
2154 channel = (info->line) - (cy_card[card].first_line);
2155 if (!IS_CYC_Z(cy_card[card])) {
2156 chip = channel >> 2;
2158 index = cy_card[card].bus_index;
2159 base_addr = cy_card[card].base_addr +
2160 (cy_chip_offset[chip] << index);
2162 CY_LOCK(info, flags);
2163 cy_writeb(base_addr + (CyCAR << index), channel);
2164 cy_writeb(base_addr + (CySRER << index),
2165 readb(base_addr + (CySRER << index)) | CyTxRdy);
2166 CY_UNLOCK(info, flags);
2168 #ifdef CONFIG_CYZ_INTR
2171 CY_LOCK(info, flags);
2172 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2175 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2176 info->line, retval);
2178 CY_UNLOCK(info, flags);
2179 #else /* CONFIG_CYZ_INTR */
2180 /* Don't have to do anything at this time */
2181 #endif /* CONFIG_CYZ_INTR */
2186 * This routine shuts down a serial port; interrupts are disabled,
2187 * and DTR is dropped if the hangup on close termio flag is on.
2189 static void shutdown(struct cyclades_port *info)
2191 unsigned long flags;
2192 void __iomem *base_addr;
2193 int card, chip, channel, index;
2195 if (!(info->flags & ASYNC_INITIALIZED)) {
2200 channel = info->line - cy_card[card].first_line;
2201 if (!IS_CYC_Z(cy_card[card])) {
2202 chip = channel >> 2;
2204 index = cy_card[card].bus_index;
2205 base_addr = cy_card[card].base_addr +
2206 (cy_chip_offset[chip] << index);
2208 #ifdef CY_DEBUG_OPEN
2209 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2211 card, chip, channel, (long)base_addr);
2214 CY_LOCK(info, flags);
2216 /* Clear delta_msr_wait queue to avoid mem leaks. */
2217 wake_up_interruptible(&info->delta_msr_wait);
2219 if (info->xmit_buf) {
2220 unsigned char *temp;
2221 temp = info->xmit_buf;
2222 info->xmit_buf = NULL;
2223 free_page((unsigned long)temp);
2225 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2226 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2227 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2228 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2230 printk("cyc shutdown dropping DTR\n");
2231 printk(" status: 0x%x, 0x%x\n",
2232 readb(base_addr + (CyMSVR1 << index)),
2233 readb(base_addr + (CyMSVR2 << index)));
2236 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2237 /* it may be appropriate to clear _XMIT at
2238 some later date (after testing)!!! */
2241 set_bit(TTY_IO_ERROR, &info->tty->flags);
2243 info->flags &= ~ASYNC_INITIALIZED;
2244 CY_UNLOCK(info, flags);
2246 struct FIRM_ID __iomem *firm_id;
2247 struct ZFW_CTRL __iomem *zfw_ctrl;
2248 struct BOARD_CTRL __iomem *board_ctrl;
2249 struct CH_CTRL __iomem *ch_ctrl;
2252 base_addr = cy_card[card].base_addr;
2253 #ifdef CY_DEBUG_OPEN
2254 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2255 card, channel, (long)base_addr);
2258 firm_id = base_addr + ID_ADDRESS;
2259 if (!ISZLOADED(cy_card[card])) {
2263 zfw_ctrl = cy_card[card].base_addr +
2264 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2265 board_ctrl = &zfw_ctrl->board_ctrl;
2266 ch_ctrl = zfw_ctrl->ch_ctrl;
2268 CY_LOCK(info, flags);
2270 if (info->xmit_buf) {
2271 unsigned char *temp;
2272 temp = info->xmit_buf;
2273 info->xmit_buf = NULL;
2274 free_page((unsigned long)temp);
2277 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2278 cy_writel(&ch_ctrl[channel].rs_control,
2279 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2280 ~(C_RS_RTS | C_RS_DTR)));
2281 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2284 printk("cyc:shutdown retval on ttyC%d was %x\n",
2285 info->line, retval);
2288 printk("cyc:shutdown dropping Z DTR\n");
2293 set_bit(TTY_IO_ERROR, &info->tty->flags);
2295 info->flags &= ~ASYNC_INITIALIZED;
2297 CY_UNLOCK(info, flags);
2300 #ifdef CY_DEBUG_OPEN
2301 printk(" cyc shutdown done\n");
2306 * ------------------------------------------------------------
2307 * cy_open() and friends
2308 * ------------------------------------------------------------
2312 block_til_ready(struct tty_struct *tty, struct file *filp,
2313 struct cyclades_port *info)
2315 DECLARE_WAITQUEUE(wait, current);
2316 struct cyclades_card *cinfo;
2317 unsigned long flags;
2318 int chip, channel, index;
2320 void __iomem *base_addr;
2322 cinfo = &cy_card[info->card];
2323 channel = info->line - cinfo->first_line;
2326 * If the device is in the middle of being closed, then block
2327 * until it's done, and then try again.
2329 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2330 if (info->flags & ASYNC_CLOSING) {
2331 interruptible_sleep_on(&info->close_wait);
2333 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2337 * If non-blocking mode is set, then make the check up front
2340 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2341 info->flags |= ASYNC_NORMAL_ACTIVE;
2346 * Block waiting for the carrier detect and the line to become
2347 * free (i.e., not in use by the callout). While we are in
2348 * this loop, info->count is dropped by one, so that
2349 * cy_close() knows when to free things. We restore it upon
2350 * exit, either normal or abnormal.
2353 add_wait_queue(&info->open_wait, &wait);
2354 #ifdef CY_DEBUG_OPEN
2355 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2356 info->line, info->count);
2359 CY_LOCK(info, flags);
2360 if (!tty_hung_up_p(filp))
2362 CY_UNLOCK(info, flags);
2363 #ifdef CY_DEBUG_COUNT
2364 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2365 current->pid, info->count);
2367 info->blocked_open++;
2369 if (!IS_CYC_Z(*cinfo)) {
2370 chip = channel >> 2;
2372 index = cinfo->bus_index;
2373 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2376 CY_LOCK(info, flags);
2377 if ((tty->termios->c_cflag & CBAUD)) {
2378 cy_writeb(base_addr + (CyCAR << index),
2380 cy_writeb(base_addr + (CyMSVR1 << index),
2382 cy_writeb(base_addr + (CyMSVR2 << index),
2385 printk("cyc:block_til_ready raising DTR\n");
2386 printk(" status: 0x%x, 0x%x\n",
2387 readb(base_addr + (CyMSVR1 << index)),
2388 readb(base_addr + (CyMSVR2 << index)));
2391 CY_UNLOCK(info, flags);
2393 set_current_state(TASK_INTERRUPTIBLE);
2394 if (tty_hung_up_p(filp) ||
2395 !(info->flags & ASYNC_INITIALIZED)) {
2396 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2397 -EAGAIN : -ERESTARTSYS);
2401 CY_LOCK(info, flags);
2402 cy_writeb(base_addr + (CyCAR << index),
2404 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2406 (CyMSVR1 << index)) & CyDCD))) {
2407 CY_UNLOCK(info, flags);
2410 CY_UNLOCK(info, flags);
2412 if (signal_pending(current)) {
2413 retval = -ERESTARTSYS;
2416 #ifdef CY_DEBUG_OPEN
2417 printk("cyc block_til_ready blocking: ttyC%d, "
2419 info->line, info->count);
2425 struct FIRM_ID __iomem *firm_id;
2426 struct ZFW_CTRL __iomem *zfw_ctrl;
2427 struct BOARD_CTRL __iomem *board_ctrl;
2428 struct CH_CTRL __iomem *ch_ctrl;
2431 base_addr = cinfo->base_addr;
2432 firm_id = base_addr + ID_ADDRESS;
2433 if (!ISZLOADED(*cinfo)) {
2434 __set_current_state(TASK_RUNNING);
2435 remove_wait_queue(&info->open_wait, &wait);
2439 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2440 board_ctrl = &zfw_ctrl->board_ctrl;
2441 ch_ctrl = zfw_ctrl->ch_ctrl;
2444 if ((tty->termios->c_cflag & CBAUD)) {
2445 cy_writel(&ch_ctrl[channel].rs_control,
2446 readl(&ch_ctrl[channel].rs_control) |
2447 C_RS_RTS | C_RS_DTR);
2448 retval = cyz_issue_cmd(&cy_card[info->card],
2449 channel, C_CM_IOCTLM, 0L);
2451 printk("cyc:block_til_ready retval on "
2453 info->line, retval);
2456 printk("cyc:block_til_ready raising Z DTR\n");
2460 set_current_state(TASK_INTERRUPTIBLE);
2461 if (tty_hung_up_p(filp) ||
2462 !(info->flags & ASYNC_INITIALIZED)) {
2463 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2464 -EAGAIN : -ERESTARTSYS);
2467 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2468 (readl(&ch_ctrl[channel].rs_status) &
2472 if (signal_pending(current)) {
2473 retval = -ERESTARTSYS;
2476 #ifdef CY_DEBUG_OPEN
2477 printk("cyc block_til_ready blocking: ttyC%d, "
2479 info->line, info->count);
2485 __set_current_state(TASK_RUNNING);
2486 remove_wait_queue(&info->open_wait, &wait);
2487 if (!tty_hung_up_p(filp)) {
2489 #ifdef CY_DEBUG_COUNT
2490 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2491 current->pid, info->count);
2494 info->blocked_open--;
2495 #ifdef CY_DEBUG_OPEN
2496 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2497 info->line, info->count);
2502 info->flags |= ASYNC_NORMAL_ACTIVE;
2504 } /* block_til_ready */
2507 * This routine is called whenever a serial port is opened. It
2508 * performs the serial-specific initialization for the tty structure.
2510 static int cy_open(struct tty_struct *tty, struct file *filp)
2512 struct cyclades_port *info;
2516 if ((line < 0) || (NR_PORTS <= line)) {
2519 info = &cy_port[line];
2520 if (info->line < 0) {
2524 /* If the card's firmware hasn't been loaded,
2525 treat it as absent from the system. This
2526 will make the user pay attention.
2528 if (IS_CYC_Z(cy_card[info->card])) {
2529 struct cyclades_card *cinfo = &cy_card[info->card];
2530 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2532 if (!ISZLOADED(*cinfo)) {
2533 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2534 (cinfo->ctl_addr))->mail_box_0)) &&
2535 Z_FPGA_CHECK(*cinfo)) &&
2536 (ZFIRM_HLT == readl(
2537 &firm_id->signature))) {
2538 printk("cyc:Cyclades-Z Error: you need an "
2539 "external power supply for this number "
2540 "of ports.\n\rFirmware halted.\r\n");
2542 printk("cyc:Cyclades-Z firmware not yet "
2547 #ifdef CONFIG_CYZ_INTR
2549 /* In case this Z board is operating in interrupt mode, its
2550 interrupts should be enabled as soon as the first open
2551 happens to one of its ports. */
2552 if (!cinfo->intr_enabled) {
2553 struct ZFW_CTRL __iomem *zfw_ctrl;
2554 struct BOARD_CTRL __iomem *board_ctrl;
2556 zfw_ctrl = cinfo->base_addr +
2557 (readl(&firm_id->zfwctrl_addr) &
2560 board_ctrl = &zfw_ctrl->board_ctrl;
2562 /* Enable interrupts on the PLX chip */
2563 cy_writew(cinfo->ctl_addr + 0x68,
2564 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2565 /* Enable interrupts on the FW */
2566 retval = cyz_issue_cmd(cinfo, 0,
2569 printk("cyc:IRQ enable retval was %x\n",
2573 (int)readl(&board_ctrl->n_channel);
2574 cinfo->intr_enabled = 1;
2577 #endif /* CONFIG_CYZ_INTR */
2578 /* Make sure this Z port really exists in hardware */
2579 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2582 #ifdef CY_DEBUG_OTHER
2583 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2585 tty->driver_data = info;
2587 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2590 #ifdef CY_DEBUG_OPEN
2591 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2595 #ifdef CY_DEBUG_COUNT
2596 printk("cyc:cy_open (%d): incrementing count to %d\n",
2597 current->pid, info->count);
2601 * If the port is the middle of closing, bail out now
2603 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2604 if (info->flags & ASYNC_CLOSING)
2605 interruptible_sleep_on(&info->close_wait);
2606 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2610 * Start up serial port
2612 retval = startup(info);
2617 retval = block_til_ready(tty, filp, info);
2619 #ifdef CY_DEBUG_OPEN
2620 printk("cyc:cy_open returning after block_til_ready with %d\n",
2628 #ifdef CY_DEBUG_OPEN
2629 printk(" cyc:cy_open done\n");
2636 * cy_wait_until_sent() --- wait until the transmitter is empty
2638 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2640 struct cyclades_port *info = tty->driver_data;
2641 void __iomem *base_addr;
2642 int card, chip, channel, index;
2643 unsigned long orig_jiffies;
2646 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2649 if (info->xmit_fifo_size == 0)
2650 return; /* Just in case.... */
2652 orig_jiffies = jiffies;
2654 * Set the check interval to be 1/5 of the estimated time to
2655 * send a single character, and make it at least 1. The check
2656 * interval should also be less than the timeout.
2658 * Note: we have to use pretty tight timings here to satisfy
2661 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2662 char_time = char_time / 5;
2668 char_time = min(char_time, timeout);
2670 * If the transmitter hasn't cleared in twice the approximate
2671 * amount of time to send the entire FIFO, it probably won't
2672 * ever clear. This assumes the UART isn't doing flow
2673 * control, which is currently the case. Hence, if it ever
2674 * takes longer than info->timeout, this is probably due to a
2675 * UART bug of some kind. So, we clamp the timeout parameter at
2678 if (!timeout || timeout > 2 * info->timeout)
2679 timeout = 2 * info->timeout;
2680 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2681 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2682 printk("jiff=%lu...", jiffies);
2685 channel = (info->line) - (cy_card[card].first_line);
2686 if (!IS_CYC_Z(cy_card[card])) {
2687 chip = channel >> 2;
2689 index = cy_card[card].bus_index;
2691 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2692 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2693 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2694 printk("Not clean (jiff=%lu)...", jiffies);
2696 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2698 if (timeout && time_after(jiffies, orig_jiffies +
2703 /* Nothing to do! */
2705 /* Run one more char cycle */
2706 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2707 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2708 printk("Clean (jiff=%lu)...done\n", jiffies);
2713 * This routine is called when a particular tty device is closed.
2715 static void cy_close(struct tty_struct *tty, struct file *filp)
2717 struct cyclades_port *info = tty->driver_data;
2718 unsigned long flags;
2720 #ifdef CY_DEBUG_OTHER
2721 printk("cyc:cy_close ttyC%d\n", info->line);
2724 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2728 CY_LOCK(info, flags);
2729 /* If the TTY is being hung up, nothing to do */
2730 if (tty_hung_up_p(filp)) {
2731 CY_UNLOCK(info, flags);
2734 #ifdef CY_DEBUG_OPEN
2735 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2737 if ((tty->count == 1) && (info->count != 1)) {
2739 * Uh, oh. tty->count is 1, which means that the tty
2740 * structure will be freed. Info->count should always
2741 * be one in these conditions. If it's greater than
2742 * one, we've got real problems, since it means the
2743 * serial port won't be shutdown.
2745 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2746 "info->count is %d\n", info->count);
2749 #ifdef CY_DEBUG_COUNT
2750 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2751 current->pid, info->count - 1);
2753 if (--info->count < 0) {
2754 #ifdef CY_DEBUG_COUNT
2755 printk("cyc:cyc_close setting count to 0\n");
2760 CY_UNLOCK(info, flags);
2763 info->flags |= ASYNC_CLOSING;
2766 * Now we wait for the transmit buffer to clear; and we notify
2767 * the line discipline to only process XON/XOFF characters.
2770 CY_UNLOCK(info, flags);
2771 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2772 tty_wait_until_sent(tty, info->closing_wait);
2774 CY_LOCK(info, flags);
2776 if (!IS_CYC_Z(cy_card[info->card])) {
2777 int channel = info->line - cy_card[info->card].first_line;
2778 int index = cy_card[info->card].bus_index;
2779 void __iomem *base_addr = cy_card[info->card].base_addr +
2780 (cy_chip_offset[channel >> 2] << index);
2781 /* Stop accepting input */
2783 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2784 cy_writeb(base_addr + (CySRER << index),
2785 readb(base_addr + (CySRER << index)) & ~CyRxData);
2786 if (info->flags & ASYNC_INITIALIZED) {
2787 /* Waiting for on-board buffers to be empty before closing
2789 CY_UNLOCK(info, flags);
2790 cy_wait_until_sent(tty, info->timeout);
2791 CY_LOCK(info, flags);
2795 /* Waiting for on-board buffers to be empty before closing the port */
2796 void __iomem *base_addr = cy_card[info->card].base_addr;
2797 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2798 struct ZFW_CTRL __iomem *zfw_ctrl =
2799 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2800 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2801 int channel = info->line - cy_card[info->card].first_line;
2804 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2805 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2808 printk("cyc:cy_close retval on ttyC%d was %x\n",
2809 info->line, retval);
2811 CY_UNLOCK(info, flags);
2812 interruptible_sleep_on(&info->shutdown_wait);
2813 CY_LOCK(info, flags);
2818 CY_UNLOCK(info, flags);
2820 if (tty->driver->flush_buffer)
2821 tty->driver->flush_buffer(tty);
2822 tty_ldisc_flush(tty);
2823 CY_LOCK(info, flags);
2828 if (info->blocked_open) {
2829 CY_UNLOCK(info, flags);
2830 if (info->close_delay) {
2831 msleep_interruptible(jiffies_to_msecs
2832 (info->close_delay));
2834 wake_up_interruptible(&info->open_wait);
2835 CY_LOCK(info, flags);
2837 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2838 wake_up_interruptible(&info->close_wait);
2840 #ifdef CY_DEBUG_OTHER
2841 printk(" cyc:cy_close done\n");
2844 CY_UNLOCK(info, flags);
2847 /* This routine gets called when tty_write has put something into
2848 * the write_queue. The characters may come from user space or
2851 * This routine will return the number of characters actually
2852 * accepted for writing.
2854 * If the port is not already transmitting stuff, start it off by
2855 * enabling interrupts. The interrupt service routine will then
2856 * ensure that the characters are sent.
2857 * If the port is already active, there is no need to kick it.
2860 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2862 struct cyclades_port *info = tty->driver_data;
2863 unsigned long flags;
2867 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2870 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2874 if (!info->xmit_buf)
2877 CY_LOCK(info, flags);
2879 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2880 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2885 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2886 info->xmit_head = (info->xmit_head + c) &
2887 (SERIAL_XMIT_SIZE - 1);
2888 info->xmit_cnt += c;
2893 CY_UNLOCK(info, flags);
2895 info->idle_stats.xmit_bytes += ret;
2896 info->idle_stats.xmit_idle = jiffies;
2898 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2905 * This routine is called by the kernel to write a single
2906 * character to the tty device. If the kernel uses this routine,
2907 * it must call the flush_chars() routine (if defined) when it is
2908 * done stuffing characters into the driver. If there is no room
2909 * in the queue, the character is ignored.
2911 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2913 struct cyclades_port *info = tty->driver_data;
2914 unsigned long flags;
2917 printk("cyc:cy_put_char ttyC%d\n", info->line);
2920 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2923 if (!info->xmit_buf)
2926 CY_LOCK(info, flags);
2927 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2928 CY_UNLOCK(info, flags);
2932 info->xmit_buf[info->xmit_head++] = ch;
2933 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2935 info->idle_stats.xmit_bytes++;
2936 info->idle_stats.xmit_idle = jiffies;
2937 CY_UNLOCK(info, flags);
2941 * This routine is called by the kernel after it has written a
2942 * series of characters to the tty device using put_char().
2944 static void cy_flush_chars(struct tty_struct *tty)
2946 struct cyclades_port *info = tty->driver_data;
2949 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2952 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2955 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2960 } /* cy_flush_chars */
2963 * This routine returns the numbers of characters the tty driver
2964 * will accept for queuing to be written. This number is subject
2965 * to change as output buffers get emptied, or if the output flow
2966 * control is activated.
2968 static int cy_write_room(struct tty_struct *tty)
2970 struct cyclades_port *info = tty->driver_data;
2974 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2977 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2979 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2983 } /* cy_write_room */
2985 static int cy_chars_in_buffer(struct tty_struct *tty)
2987 struct cyclades_port *info = tty->driver_data;
2990 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2994 channel = (info->line) - (cy_card[card].first_line);
2996 #ifdef Z_EXT_CHARS_IN_BUFFER
2997 if (!IS_CYC_Z(cy_card[card])) {
2998 #endif /* Z_EXT_CHARS_IN_BUFFER */
3000 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3002 return info->xmit_cnt;
3003 #ifdef Z_EXT_CHARS_IN_BUFFER
3005 static struct FIRM_ID *firm_id;
3006 static struct ZFW_CTRL *zfw_ctrl;
3007 static struct CH_CTRL *ch_ctrl;
3008 static struct BUF_CTRL *buf_ctrl;
3010 __u32 tx_put, tx_get, tx_bufsize;
3012 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3013 zfw_ctrl = cy_card[card].base_addr +
3014 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3015 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3016 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3018 tx_get = readl(&buf_ctrl->tx_get);
3019 tx_put = readl(&buf_ctrl->tx_put);
3020 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3021 if (tx_put >= tx_get)
3022 char_count = tx_put - tx_get;
3024 char_count = tx_put - tx_get + tx_bufsize;
3026 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3028 return info->xmit_cnt + char_count;
3030 #endif /* Z_EXT_CHARS_IN_BUFFER */
3031 } /* cy_chars_in_buffer */
3034 * ------------------------------------------------------------
3035 * cy_ioctl() and friends
3036 * ------------------------------------------------------------
3039 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3041 int co, co_val, bpr;
3042 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3046 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3050 /* determine which prescaler to use */
3051 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3052 if (cy_clock / co_val / baud > 63)
3056 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3060 info->tbpr = info->rbpr = bpr;
3061 info->tco = info->rco = co;
3065 * This routine finds or computes the various line characteristics.
3066 * It used to be called config_setup
3068 static void set_line_char(struct cyclades_port *info)
3070 unsigned long flags;
3071 void __iomem *base_addr;
3072 int card, chip, channel, index;
3073 unsigned cflag, iflag;
3074 unsigned short chip_number;
3075 int baud, baud_rate = 0;
3078 if (!info->tty || !info->tty->termios) {
3081 if (info->line == -1) {
3084 cflag = info->tty->termios->c_cflag;
3085 iflag = info->tty->termios->c_iflag;
3088 * Set up the tty->alt_speed kludge
3091 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3092 info->tty->alt_speed = 57600;
3093 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3094 info->tty->alt_speed = 115200;
3095 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3096 info->tty->alt_speed = 230400;
3097 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3098 info->tty->alt_speed = 460800;
3102 channel = (info->line) - (cy_card[card].first_line);
3103 chip_number = channel / 4;
3105 if (!IS_CYC_Z(cy_card[card])) {
3107 index = cy_card[card].bus_index;
3110 baud = tty_get_baud_rate(info->tty);
3111 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3113 if (info->custom_divisor)
3114 baud_rate = info->baud / info->custom_divisor;
3116 baud_rate = info->baud;
3117 } else if (baud > CD1400_MAX_SPEED) {
3118 baud = CD1400_MAX_SPEED;
3120 /* find the baud index */
3121 for (i = 0; i < 20; i++) {
3122 if (baud == baud_table[i]) {
3127 i = 19; /* CD1400_MAX_SPEED */
3130 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3132 cyy_baud_calc(info, baud_rate);
3134 if (info->chip_rev >= CD1400_REV_J) {
3135 /* It is a CD1400 rev. J or later */
3136 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3137 info->tco = baud_co_60[i]; /* Tx CO */
3138 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3139 info->rco = baud_co_60[i]; /* Rx CO */
3141 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3142 info->tco = baud_co_25[i]; /* Tx CO */
3143 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3144 info->rco = baud_co_25[i]; /* Rx CO */
3147 if (baud_table[i] == 134) {
3148 /* get it right for 134.5 baud */
3149 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3151 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3153 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3155 } else if (baud_table[i]) {
3156 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3158 /* this needs to be propagated into the card info */
3162 /* By tradition (is it a standard?) a baud rate of zero
3163 implies the line should be/has been closed. A bit
3164 later in this routine such a test is performed. */
3166 /* byte size and parity */
3169 /* receive threshold */
3170 info->cor3 = (info->default_threshold ?
3171 info->default_threshold : baud_cor3[i]);
3173 switch (cflag & CSIZE) {
3175 info->cor1 = Cy_5_BITS;
3178 info->cor1 = Cy_6_BITS;
3181 info->cor1 = Cy_7_BITS;
3184 info->cor1 = Cy_8_BITS;
3187 if (cflag & CSTOPB) {
3188 info->cor1 |= Cy_2_STOP;
3190 if (cflag & PARENB) {
3191 if (cflag & PARODD) {
3192 info->cor1 |= CyPARITY_O;
3194 info->cor1 |= CyPARITY_E;
3197 info->cor1 |= CyPARITY_NONE;
3200 /* CTS flow control flag */
3201 if (cflag & CRTSCTS) {
3202 info->flags |= ASYNC_CTS_FLOW;
3203 info->cor2 |= CyCtsAE;
3205 info->flags &= ~ASYNC_CTS_FLOW;
3206 info->cor2 &= ~CyCtsAE;
3209 info->flags &= ~ASYNC_CHECK_CD;
3211 info->flags |= ASYNC_CHECK_CD;
3213 /***********************************************
3214 The hardware option, CyRtsAO, presents RTS when
3215 the chip has characters to send. Since most modems
3216 use RTS as reverse (inbound) flow control, this
3217 option is not used. If inbound flow control is
3218 necessary, DTR can be programmed to provide the
3219 appropriate signals for use with a non-standard
3220 cable. Contact Marcio Saito for details.
3221 ***********************************************/
3223 chip = channel >> 2;
3225 base_addr = cy_card[card].base_addr +
3226 (cy_chip_offset[chip] << index);
3228 CY_LOCK(info, flags);
3229 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3231 /* tx and rx baud rate */
3233 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3234 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3235 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3236 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3238 /* set line characteristics according configuration */
3240 cy_writeb(base_addr + (CySCHR1 << index),
3241 START_CHAR(info->tty));
3242 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3243 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3244 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3245 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3246 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3247 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3249 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3252 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3253 cy_writeb(base_addr + (CyRTPR << index),
3254 (info->default_timeout ? info->default_timeout : 0x02));
3255 /* 10ms rx timeout */
3257 if (C_CLOCAL(info->tty)) {
3258 /* without modem intr */
3259 cy_writeb(base_addr + (CySRER << index),
3260 readb(base_addr + (CySRER << index)) | CyMdmCh);
3261 /* act on 1->0 modem transitions */
3262 if ((cflag & CRTSCTS) && info->rflow) {
3263 cy_writeb(base_addr + (CyMCOR1 << index),
3264 (CyCTS | rflow_thr[i]));
3266 cy_writeb(base_addr + (CyMCOR1 << index),
3269 /* act on 0->1 modem transitions */
3270 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3272 /* without modem intr */
3273 cy_writeb(base_addr + (CySRER << index),
3275 (CySRER << index)) | CyMdmCh);
3276 /* act on 1->0 modem transitions */
3277 if ((cflag & CRTSCTS) && info->rflow) {
3278 cy_writeb(base_addr + (CyMCOR1 << index),
3279 (CyDSR | CyCTS | CyRI | CyDCD |
3282 cy_writeb(base_addr + (CyMCOR1 << index),
3283 CyDSR | CyCTS | CyRI | CyDCD);
3285 /* act on 0->1 modem transitions */
3286 cy_writeb(base_addr + (CyMCOR2 << index),
3287 CyDSR | CyCTS | CyRI | CyDCD);
3290 if (i == 0) { /* baud rate is zero, turn off line */
3291 if (info->rtsdtr_inv) {
3292 cy_writeb(base_addr + (CyMSVR1 << index),
3295 cy_writeb(base_addr + (CyMSVR2 << index),
3299 printk("cyc:set_line_char dropping DTR\n");
3300 printk(" status: 0x%x, 0x%x\n",
3301 readb(base_addr + (CyMSVR1 << index)),
3302 readb(base_addr + (CyMSVR2 << index)));
3305 if (info->rtsdtr_inv) {
3306 cy_writeb(base_addr + (CyMSVR1 << index),
3309 cy_writeb(base_addr + (CyMSVR2 << index),
3313 printk("cyc:set_line_char raising DTR\n");
3314 printk(" status: 0x%x, 0x%x\n",
3315 readb(base_addr + (CyMSVR1 << index)),
3316 readb(base_addr + (CyMSVR2 << index)));
3321 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3323 CY_UNLOCK(info, flags);
3326 struct FIRM_ID __iomem *firm_id;
3327 struct ZFW_CTRL __iomem *zfw_ctrl;
3328 struct BOARD_CTRL __iomem *board_ctrl;
3329 struct CH_CTRL __iomem *ch_ctrl;
3330 struct BUF_CTRL __iomem *buf_ctrl;
3334 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3335 if (!ISZLOADED(cy_card[card])) {
3339 zfw_ctrl = cy_card[card].base_addr +
3340 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3341 board_ctrl = &zfw_ctrl->board_ctrl;
3342 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3343 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3346 baud = tty_get_baud_rate(info->tty);
3347 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3349 if (info->custom_divisor)
3350 baud_rate = info->baud / info->custom_divisor;
3352 baud_rate = info->baud;
3353 } else if (baud > CYZ_MAX_SPEED) {
3354 baud = CYZ_MAX_SPEED;
3356 cy_writel(&ch_ctrl->comm_baud, baud);
3359 /* get it right for 134.5 baud */
3360 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3362 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3364 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3367 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3369 /* this needs to be propagated into the card info */
3374 /* byte size and parity */
3375 switch (cflag & CSIZE) {
3377 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3380 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3383 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3386 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3389 if (cflag & CSTOPB) {
3390 cy_writel(&ch_ctrl->comm_data_l,
3391 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3393 cy_writel(&ch_ctrl->comm_data_l,
3394 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3396 if (cflag & PARENB) {
3397 if (cflag & PARODD) {
3398 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3400 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3403 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3406 /* CTS flow control flag */
3407 if (cflag & CRTSCTS) {
3408 cy_writel(&ch_ctrl->hw_flow,
3409 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3411 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3412 ~(C_RS_CTS | C_RS_RTS));
3414 /* As the HW flow control is done in firmware, the driver
3415 doesn't need to care about it */
3416 info->flags &= ~ASYNC_CTS_FLOW;
3418 /* XON/XOFF/XANY flow control flags */
3421 sw_flow |= C_FL_OXX;
3423 sw_flow |= C_FL_OIXANY;
3425 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3427 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3429 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3430 info->line, retval);
3433 /* CD sensitivity */
3434 if (cflag & CLOCAL) {
3435 info->flags &= ~ASYNC_CHECK_CD;
3437 info->flags |= ASYNC_CHECK_CD;
3440 if (baud == 0) { /* baud rate is zero, turn off line */
3441 cy_writel(&ch_ctrl->rs_control,
3442 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3444 printk("cyc:set_line_char dropping Z DTR\n");
3447 cy_writel(&ch_ctrl->rs_control,
3448 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3450 printk("cyc:set_line_char raising Z DTR\n");
3454 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3456 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3457 info->line, retval);
3461 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3464 } /* set_line_char */
3467 get_serial_info(struct cyclades_port *info,
3468 struct serial_struct __user * retinfo)
3470 struct serial_struct tmp;
3471 struct cyclades_card *cinfo = &cy_card[info->card];
3475 memset(&tmp, 0, sizeof(tmp));
3476 tmp.type = info->type;
3477 tmp.line = info->line;
3478 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3479 tmp.irq = cinfo->irq;
3480 tmp.flags = info->flags;
3481 tmp.close_delay = info->close_delay;
3482 tmp.closing_wait = info->closing_wait;
3483 tmp.baud_base = info->baud;
3484 tmp.custom_divisor = info->custom_divisor;
3485 tmp.hub6 = 0; /*!!! */
3486 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3487 } /* get_serial_info */
3490 set_serial_info(struct cyclades_port *info,
3491 struct serial_struct __user * new_info)
3493 struct serial_struct new_serial;
3494 struct cyclades_port old_info;
3496 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3500 if (!capable(CAP_SYS_ADMIN)) {
3501 if (new_serial.close_delay != info->close_delay ||
3502 new_serial.baud_base != info->baud ||
3503 (new_serial.flags & ASYNC_FLAGS &
3505 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3507 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3508 (new_serial.flags & ASYNC_USR_MASK);
3509 info->baud = new_serial.baud_base;
3510 info->custom_divisor = new_serial.custom_divisor;
3511 goto check_and_exit;
3515 * OK, past this point, all the error checking has been done.
3516 * At this point, we start making changes.....
3519 info->baud = new_serial.baud_base;
3520 info->custom_divisor = new_serial.custom_divisor;
3521 info->flags = (info->flags & ~ASYNC_FLAGS) |
3522 (new_serial.flags & ASYNC_FLAGS);
3523 info->close_delay = new_serial.close_delay * HZ / 100;
3524 info->closing_wait = new_serial.closing_wait * HZ / 100;
3527 if (info->flags & ASYNC_INITIALIZED) {
3528 set_line_char(info);
3531 return startup(info);
3533 } /* set_serial_info */
3536 * get_lsr_info - get line status register info
3538 * Purpose: Let user call ioctl() to get info when the UART physically
3539 * is emptied. On bus types like RS485, the transmitter must
3540 * release the bus after transmitting. This must be done when
3541 * the transmit shift register is empty, not be done when the
3542 * transmit holding register is empty. This functionality
3543 * allows an RS485 driver to be written in user space.
3545 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3547 int card, chip, channel, index;
3548 unsigned char status;
3549 unsigned int result;
3550 unsigned long flags;
3551 void __iomem *base_addr;
3554 channel = (info->line) - (cy_card[card].first_line);
3555 if (!IS_CYC_Z(cy_card[card])) {
3556 chip = channel >> 2;
3558 index = cy_card[card].bus_index;
3560 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3562 CY_LOCK(info, flags);
3563 status = readb(base_addr + (CySRER << index)) &
3564 (CyTxRdy | CyTxMpty);
3565 CY_UNLOCK(info, flags);
3566 result = (status ? 0 : TIOCSER_TEMT);
3568 /* Not supported yet */
3571 return put_user(result, (unsigned long __user *)value);
3574 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3576 struct cyclades_port *info = tty->driver_data;
3577 int card, chip, channel, index;
3578 void __iomem *base_addr;
3579 unsigned long flags;
3580 unsigned char status;
3581 unsigned long lstatus;
3582 unsigned int result;
3583 struct FIRM_ID __iomem *firm_id;
3584 struct ZFW_CTRL __iomem *zfw_ctrl;
3585 struct BOARD_CTRL __iomem *board_ctrl;
3586 struct CH_CTRL __iomem *ch_ctrl;
3588 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3592 channel = (info->line) - (cy_card[card].first_line);
3593 if (!IS_CYC_Z(cy_card[card])) {
3594 chip = channel >> 2;
3596 index = cy_card[card].bus_index;
3598 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3600 CY_LOCK(info, flags);
3601 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3602 status = readb(base_addr + (CyMSVR1 << index));
3603 status |= readb(base_addr + (CyMSVR2 << index));
3604 CY_UNLOCK(info, flags);
3606 if (info->rtsdtr_inv) {
3607 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3608 ((status & CyDTR) ? TIOCM_RTS : 0);
3610 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3611 ((status & CyDTR) ? TIOCM_DTR : 0);
3613 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3614 ((status & CyRI) ? TIOCM_RNG : 0) |
3615 ((status & CyDSR) ? TIOCM_DSR : 0) |
3616 ((status & CyCTS) ? TIOCM_CTS : 0);
3618 base_addr = cy_card[card].base_addr;
3620 if (cy_card[card].num_chips != -1) {
3624 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3625 if (ISZLOADED(cy_card[card])) {
3626 zfw_ctrl = cy_card[card].base_addr +
3627 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3628 board_ctrl = &zfw_ctrl->board_ctrl;
3629 ch_ctrl = zfw_ctrl->ch_ctrl;
3630 lstatus = readl(&ch_ctrl[channel].rs_status);
3631 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3632 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3633 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3634 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3635 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3636 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3647 cy_tiocmset(struct tty_struct *tty, struct file *file,
3648 unsigned int set, unsigned int clear)
3650 struct cyclades_port *info = tty->driver_data;
3651 int card, chip, channel, index;
3652 void __iomem *base_addr;
3653 unsigned long flags;
3654 struct FIRM_ID __iomem *firm_id;
3655 struct ZFW_CTRL __iomem *zfw_ctrl;
3656 struct BOARD_CTRL __iomem *board_ctrl;
3657 struct CH_CTRL __iomem *ch_ctrl;
3660 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3664 channel = (info->line) - (cy_card[card].first_line);
3665 if (!IS_CYC_Z(cy_card[card])) {
3666 chip = channel >> 2;
3668 index = cy_card[card].bus_index;
3670 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3672 if (set & TIOCM_RTS) {
3673 CY_LOCK(info, flags);
3674 cy_writeb(base_addr + (CyCAR << index),
3676 if (info->rtsdtr_inv) {
3677 cy_writeb(base_addr + (CyMSVR2 << index),
3680 cy_writeb(base_addr + (CyMSVR1 << index),
3683 CY_UNLOCK(info, flags);
3685 if (clear & TIOCM_RTS) {
3686 CY_LOCK(info, flags);
3687 cy_writeb(base_addr + (CyCAR << index),
3689 if (info->rtsdtr_inv) {
3690 cy_writeb(base_addr + (CyMSVR2 << index),
3693 cy_writeb(base_addr + (CyMSVR1 << index),
3696 CY_UNLOCK(info, flags);
3698 if (set & TIOCM_DTR) {
3699 CY_LOCK(info, flags);
3700 cy_writeb(base_addr + (CyCAR << index),
3702 if (info->rtsdtr_inv) {
3703 cy_writeb(base_addr + (CyMSVR1 << index),
3706 cy_writeb(base_addr + (CyMSVR2 << index),
3710 printk("cyc:set_modem_info raising DTR\n");
3711 printk(" status: 0x%x, 0x%x\n",
3712 readb(base_addr + (CyMSVR1 << index)),
3713 readb(base_addr + (CyMSVR2 << index)));
3715 CY_UNLOCK(info, flags);
3717 if (clear & TIOCM_DTR) {
3718 CY_LOCK(info, flags);
3719 cy_writeb(base_addr + (CyCAR << index),
3721 if (info->rtsdtr_inv) {
3722 cy_writeb(base_addr + (CyMSVR1 << index),
3725 cy_writeb(base_addr + (CyMSVR2 << index),
3730 printk("cyc:set_modem_info dropping DTR\n");
3731 printk(" status: 0x%x, 0x%x\n",
3732 readb(base_addr + (CyMSVR1 << index)),
3733 readb(base_addr + (CyMSVR2 << index)));
3735 CY_UNLOCK(info, flags);
3738 base_addr = cy_card[card].base_addr;
3740 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3741 if (ISZLOADED(cy_card[card])) {
3742 zfw_ctrl = cy_card[card].base_addr +
3743 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3744 board_ctrl = &zfw_ctrl->board_ctrl;
3745 ch_ctrl = zfw_ctrl->ch_ctrl;
3747 if (set & TIOCM_RTS) {
3748 CY_LOCK(info, flags);
3749 cy_writel(&ch_ctrl[channel].rs_control,
3750 readl(&ch_ctrl[channel].rs_control) |
3752 CY_UNLOCK(info, flags);
3754 if (clear & TIOCM_RTS) {
3755 CY_LOCK(info, flags);
3756 cy_writel(&ch_ctrl[channel].rs_control,
3757 readl(&ch_ctrl[channel].rs_control) &
3759 CY_UNLOCK(info, flags);
3761 if (set & TIOCM_DTR) {
3762 CY_LOCK(info, flags);
3763 cy_writel(&ch_ctrl[channel].rs_control,
3764 readl(&ch_ctrl[channel].rs_control) |
3767 printk("cyc:set_modem_info raising Z DTR\n");
3769 CY_UNLOCK(info, flags);
3771 if (clear & TIOCM_DTR) {
3772 CY_LOCK(info, flags);
3773 cy_writel(&ch_ctrl[channel].rs_control,
3774 readl(&ch_ctrl[channel].rs_control) &
3777 printk("cyc:set_modem_info clearing Z DTR\n");
3779 CY_UNLOCK(info, flags);
3784 CY_LOCK(info, flags);
3785 retval = cyz_issue_cmd(&cy_card[info->card],
3786 channel, C_CM_IOCTLM, 0L);
3788 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3789 info->line, retval);
3791 CY_UNLOCK(info, flags);
3797 * cy_break() --- routine which turns the break handling on or off
3799 static void cy_break(struct tty_struct *tty, int break_state)
3801 struct cyclades_port *info = tty->driver_data;
3802 unsigned long flags;
3804 if (serial_paranoia_check(info, tty->name, "cy_break"))
3807 CY_LOCK(info, flags);
3808 if (!IS_CYC_Z(cy_card[info->card])) {
3809 /* Let the transmit ISR take care of this (since it
3810 requires stuffing characters into the output stream).
3812 if (break_state == -1) {
3813 if (!info->breakon) {
3815 if (!info->xmit_cnt) {
3816 CY_UNLOCK(info, flags);
3818 CY_LOCK(info, flags);
3822 if (!info->breakoff) {
3824 if (!info->xmit_cnt) {
3825 CY_UNLOCK(info, flags);
3827 CY_LOCK(info, flags);
3834 if (break_state == -1) {
3835 retval = cyz_issue_cmd(&cy_card[info->card],
3836 info->line - cy_card[info->card].first_line,
3837 C_CM_SET_BREAK, 0L);
3839 printk("cyc:cy_break (set) retval on ttyC%d "
3840 "was %x\n", info->line, retval);
3843 retval = cyz_issue_cmd(&cy_card[info->card],
3844 info->line - cy_card[info->card].first_line,
3845 C_CM_CLR_BREAK, 0L);
3847 printk("cyc:cy_break (clr) retval on ttyC%d "
3848 "was %x\n", info->line, retval);
3852 CY_UNLOCK(info, flags);
3856 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3859 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3861 info->mon.int_count = 0;
3862 info->mon.char_count = 0;
3863 info->mon.char_max = 0;
3864 info->mon.char_last = 0;
3866 } /* get_mon_info */
3868 static int set_threshold(struct cyclades_port *info, unsigned long value)
3870 void __iomem *base_addr;
3871 int card, channel, chip, index;
3872 unsigned long flags;
3875 channel = info->line - cy_card[card].first_line;
3876 if (!IS_CYC_Z(cy_card[card])) {
3877 chip = channel >> 2;
3879 index = cy_card[card].bus_index;
3881 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3883 info->cor3 &= ~CyREC_FIFO;
3884 info->cor3 |= value & CyREC_FIFO;
3886 CY_LOCK(info, flags);
3887 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3888 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3889 CY_UNLOCK(info, flags);
3891 /* Nothing to do! */
3894 } /* set_threshold */
3897 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3899 void __iomem *base_addr;
3900 int card, channel, chip, index;
3904 channel = info->line - cy_card[card].first_line;
3905 if (!IS_CYC_Z(cy_card[card])) {
3906 chip = channel >> 2;
3908 index = cy_card[card].bus_index;
3910 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3912 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3913 return put_user(tmp, value);
3915 /* Nothing to do! */
3918 } /* get_threshold */
3921 set_default_threshold(struct cyclades_port *info, unsigned long value)
3923 info->default_threshold = value & 0x0f;
3925 } /* set_default_threshold */
3928 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3930 return put_user(info->default_threshold, value);
3931 } /* get_default_threshold */
3933 static int set_timeout(struct cyclades_port *info, unsigned long value)
3935 void __iomem *base_addr;
3936 int card, channel, chip, index;
3937 unsigned long flags;
3940 channel = info->line - cy_card[card].first_line;
3941 if (!IS_CYC_Z(cy_card[card])) {
3942 chip = channel >> 2;
3944 index = cy_card[card].bus_index;
3946 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3948 CY_LOCK(info, flags);
3949 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3950 CY_UNLOCK(info, flags);
3952 /* Nothing to do! */
3957 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3959 void __iomem *base_addr;
3960 int card, channel, chip, index;
3964 channel = info->line - cy_card[card].first_line;
3965 if (!IS_CYC_Z(cy_card[card])) {
3966 chip = channel >> 2;
3968 index = cy_card[card].bus_index;
3970 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3972 tmp = readb(base_addr + (CyRTPR << index));
3973 return put_user(tmp, value);
3975 /* Nothing to do! */
3980 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3982 info->default_timeout = value & 0xff;
3984 } /* set_default_timeout */
3987 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3989 return put_user(info->default_timeout, value);
3990 } /* get_default_timeout */
3993 * This routine allows the tty driver to implement device-
3994 * specific ioctl's. If the ioctl number passed in cmd is
3995 * not recognized by the driver, it should return ENOIOCTLCMD.
3998 cy_ioctl(struct tty_struct *tty, struct file *file,
3999 unsigned int cmd, unsigned long arg)
4001 struct cyclades_port *info = tty->driver_data;
4002 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4003 struct serial_icounter_struct __user *p_cuser; /* user space */
4005 unsigned long flags;
4006 void __user *argp = (void __user *)arg;
4008 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4011 #ifdef CY_DEBUG_OTHER
4012 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4017 ret_val = get_mon_info(info, argp);
4020 ret_val = get_threshold(info, argp);
4023 ret_val = set_threshold(info, arg);
4025 case CYGETDEFTHRESH:
4026 ret_val = get_default_threshold(info, argp);
4028 case CYSETDEFTHRESH:
4029 ret_val = set_default_threshold(info, arg);
4032 ret_val = get_timeout(info, argp);
4035 ret_val = set_timeout(info, arg);
4037 case CYGETDEFTIMEOUT:
4038 ret_val = get_default_timeout(info, argp);
4040 case CYSETDEFTIMEOUT:
4041 ret_val = set_default_timeout(info, arg);
4044 info->rflow = (int)arg;
4048 ret_val = info->rflow;
4050 case CYSETRTSDTR_INV:
4051 info->rtsdtr_inv = (int)arg;
4054 case CYGETRTSDTR_INV:
4055 ret_val = info->rtsdtr_inv;
4058 if (copy_to_user(argp, &cy_card[info->card],
4059 sizeof(struct cyclades_card))) {
4065 case CYGETCD1400VER:
4066 ret_val = info->chip_rev;
4068 #ifndef CONFIG_CYZ_INTR
4069 case CYZSETPOLLCYCLE:
4070 cyz_polling_cycle = (arg * HZ) / 1000;
4073 case CYZGETPOLLCYCLE:
4074 ret_val = (cyz_polling_cycle * 1000) / HZ;
4076 #endif /* CONFIG_CYZ_INTR */
4078 info->closing_wait = (unsigned short)arg *HZ / 100;
4082 ret_val = info->closing_wait / (HZ / 100);
4085 ret_val = get_serial_info(info, argp);
4088 ret_val = set_serial_info(info, argp);
4090 case TIOCSERGETLSR: /* Get line status register */
4091 ret_val = get_lsr_info(info, argp);
4094 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4095 * - mask passed in arg for lines of interest
4096 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4097 * Caller should use TIOCGICOUNT to see which one it was
4100 CY_LOCK(info, flags);
4101 /* note the counters on entry */
4102 cprev = info->icount;
4103 CY_UNLOCK(info, flags);
4105 interruptible_sleep_on(&info->delta_msr_wait);
4106 /* see if a signal did it */
4107 if (signal_pending(current)) {
4108 return -ERESTARTSYS;
4111 CY_LOCK(info, flags);
4112 cnow = info->icount; /* atomic copy */
4113 CY_UNLOCK(info, flags);
4115 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4116 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4117 return -EIO; /* no change => error */
4119 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4120 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4121 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4122 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4130 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4131 * Return: write counters to the user passed counter struct
4132 * NB: both 1->0 and 0->1 transitions are counted except for
4133 * RI where only 0->1 is counted.
4136 CY_LOCK(info, flags);
4137 cnow = info->icount;
4138 CY_UNLOCK(info, flags);
4140 ret_val = put_user(cnow.cts, &p_cuser->cts);
4143 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4146 ret_val = put_user(cnow.rng, &p_cuser->rng);
4149 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4152 ret_val = put_user(cnow.rx, &p_cuser->rx);
4155 ret_val = put_user(cnow.tx, &p_cuser->tx);
4158 ret_val = put_user(cnow.frame, &p_cuser->frame);
4161 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4164 ret_val = put_user(cnow.parity, &p_cuser->parity);
4167 ret_val = put_user(cnow.brk, &p_cuser->brk);
4170 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4176 ret_val = -ENOIOCTLCMD;
4179 #ifdef CY_DEBUG_OTHER
4180 printk(" cyc:cy_ioctl done\n");
4187 * This routine allows the tty driver to be notified when
4188 * device's termios settings have changed. Note that a
4189 * well-designed tty driver should be prepared to accept the case
4190 * where old == NULL, and try to do something rational.
4192 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4194 struct cyclades_port *info = tty->driver_data;
4196 #ifdef CY_DEBUG_OTHER
4197 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4200 if (tty->termios->c_cflag == old_termios->c_cflag &&
4201 (tty->termios->c_iflag & (IXON | IXANY)) ==
4202 (old_termios->c_iflag & (IXON | IXANY)))
4204 set_line_char(info);
4206 if ((old_termios->c_cflag & CRTSCTS) &&
4207 !(tty->termios->c_cflag & CRTSCTS)) {
4208 tty->hw_stopped = 0;
4213 * No need to wake up processes in open wait, since they
4214 * sample the CLOCAL flag once, and don't recheck it.
4215 * XXX It's not clear whether the current behavior is correct
4216 * or not. Hence, this may change.....
4218 if (!(old_termios->c_cflag & CLOCAL) &&
4219 (tty->termios->c_cflag & CLOCAL))
4220 wake_up_interruptible(&info->open_wait);
4222 } /* cy_set_termios */
4224 /* This function is used to send a high-priority XON/XOFF character to
4227 static void cy_send_xchar(struct tty_struct *tty, char ch)
4229 struct cyclades_port *info = tty->driver_data;
4232 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4241 channel = info->line - cy_card[card].first_line;
4243 if (IS_CYC_Z(cy_card[card])) {
4244 if (ch == STOP_CHAR(tty))
4245 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4247 else if (ch == START_CHAR(tty))
4248 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4253 /* This routine is called by the upper-layer tty layer to signal
4254 that incoming characters should be throttled because the input
4255 buffers are close to full.
4257 static void cy_throttle(struct tty_struct *tty)
4259 struct cyclades_port *info = tty->driver_data;
4260 unsigned long flags;
4261 void __iomem *base_addr;
4262 int card, chip, channel, index;
4264 #ifdef CY_DEBUG_THROTTLE
4267 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4268 tty->ldisc.chars_in_buffer(tty), info->line);
4271 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4278 if (!IS_CYC_Z(cy_card[card]))
4279 cy_send_xchar(tty, STOP_CHAR(tty));
4284 if (tty->termios->c_cflag & CRTSCTS) {
4285 channel = info->line - cy_card[card].first_line;
4286 if (!IS_CYC_Z(cy_card[card])) {
4287 chip = channel >> 2;
4289 index = cy_card[card].bus_index;
4290 base_addr = cy_card[card].base_addr +
4291 (cy_chip_offset[chip] << index);
4293 CY_LOCK(info, flags);
4294 cy_writeb(base_addr + (CyCAR << index),
4296 if (info->rtsdtr_inv) {
4297 cy_writeb(base_addr + (CyMSVR2 << index),
4300 cy_writeb(base_addr + (CyMSVR1 << index),
4303 CY_UNLOCK(info, flags);
4311 * This routine notifies the tty driver that it should signal
4312 * that characters can now be sent to the tty without fear of
4313 * overrunning the input buffers of the line disciplines.
4315 static void cy_unthrottle(struct tty_struct *tty)
4317 struct cyclades_port *info = tty->driver_data;
4318 unsigned long flags;
4319 void __iomem *base_addr;
4320 int card, chip, channel, index;
4322 #ifdef CY_DEBUG_THROTTLE
4325 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4326 tty->ldisc.chars_in_buffer(tty), info->line);
4329 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4337 cy_send_xchar(tty, START_CHAR(tty));
4340 if (tty->termios->c_cflag & CRTSCTS) {
4342 channel = info->line - cy_card[card].first_line;
4343 if (!IS_CYC_Z(cy_card[card])) {
4344 chip = channel >> 2;
4346 index = cy_card[card].bus_index;
4347 base_addr = cy_card[card].base_addr +
4348 (cy_chip_offset[chip] << index);
4350 CY_LOCK(info, flags);
4351 cy_writeb(base_addr + (CyCAR << index),
4353 if (info->rtsdtr_inv) {
4354 cy_writeb(base_addr + (CyMSVR2 << index),
4357 cy_writeb(base_addr + (CyMSVR1 << index),
4360 CY_UNLOCK(info, flags);
4365 } /* cy_unthrottle */
4367 /* cy_start and cy_stop provide software output flow control as a
4368 function of XON/XOFF, software CTS, and other such stuff.
4370 static void cy_stop(struct tty_struct *tty)
4372 struct cyclades_card *cinfo;
4373 struct cyclades_port *info = tty->driver_data;
4374 void __iomem *base_addr;
4375 int chip, channel, index;
4376 unsigned long flags;
4378 #ifdef CY_DEBUG_OTHER
4379 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4382 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4385 cinfo = &cy_card[info->card];
4386 channel = info->line - cinfo->first_line;
4387 if (!IS_CYC_Z(*cinfo)) {
4388 index = cinfo->bus_index;
4389 chip = channel >> 2;
4391 base_addr = cy_card[info->card].base_addr +
4392 (cy_chip_offset[chip] << index);
4394 CY_LOCK(info, flags);
4395 cy_writeb(base_addr + (CyCAR << index),
4396 (u_char)(channel & 0x0003)); /* index channel */
4397 cy_writeb(base_addr + (CySRER << index),
4398 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4399 CY_UNLOCK(info, flags);
4401 /* Nothing to do! */
4405 static void cy_start(struct tty_struct *tty)
4407 struct cyclades_card *cinfo;
4408 struct cyclades_port *info = tty->driver_data;
4409 void __iomem *base_addr;
4410 int chip, channel, index;
4411 unsigned long flags;
4413 #ifdef CY_DEBUG_OTHER
4414 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4417 if (serial_paranoia_check(info, tty->name, "cy_start"))
4420 cinfo = &cy_card[info->card];
4421 channel = info->line - cinfo->first_line;
4422 index = cinfo->bus_index;
4423 if (!IS_CYC_Z(*cinfo)) {
4424 chip = channel >> 2;
4426 base_addr = cy_card[info->card].base_addr +
4427 (cy_chip_offset[chip] << index);
4429 CY_LOCK(info, flags);
4430 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4431 cy_writeb(base_addr + (CySRER << index),
4432 readb(base_addr + (CySRER << index)) | CyTxRdy);
4433 CY_UNLOCK(info, flags);
4435 /* Nothing to do! */
4439 static void cy_flush_buffer(struct tty_struct *tty)
4441 struct cyclades_port *info = tty->driver_data;
4442 int card, channel, retval;
4443 unsigned long flags;
4446 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4449 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4453 channel = (info->line) - (cy_card[card].first_line);
4455 CY_LOCK(info, flags);
4456 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4457 CY_UNLOCK(info, flags);
4459 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4461 CY_LOCK(info, flags);
4463 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4465 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4466 info->line, retval);
4468 CY_UNLOCK(info, flags);
4471 } /* cy_flush_buffer */
4474 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4476 static void cy_hangup(struct tty_struct *tty)
4478 struct cyclades_port *info = tty->driver_data;
4480 #ifdef CY_DEBUG_OTHER
4481 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4484 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4487 cy_flush_buffer(tty);
4491 #ifdef CY_DEBUG_COUNT
4492 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4495 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4496 wake_up_interruptible(&info->open_wait);
4500 * ---------------------------------------------------------------------
4501 * cy_init() and friends
4503 * cy_init() is called at boot-time to initialize the serial driver.
4504 * ---------------------------------------------------------------------
4507 static void __devinit cy_init_card(struct cyclades_card *cinfo,
4508 const unsigned int board)
4510 struct cyclades_port *info;
4512 unsigned int nports;
4513 unsigned short chip_number;
4516 if (cinfo->num_chips == -1) { /* Cyclades-Z */
4517 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4518 cinfo->ctl_addr)->mail_box_0);
4519 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4520 cinfo->intr_enabled = 0;
4521 cinfo->nports = 0; /* Will be correctly set later, after
4523 spin_lock_init(&cinfo->card_lock);
4524 for (port = cinfo->first_line;
4525 port < cinfo->first_line + nports; port++) {
4526 info = &cy_port[port];
4527 info->magic = CYCLADES_MAGIC;
4528 info->type = PORT_STARTECH;
4532 info->flags = STD_COM_FLAGS;
4534 if (mailbox == ZO_V1)
4535 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4537 info->xmit_fifo_size =
4548 info->custom_divisor = 0;
4549 info->close_delay = 5 * HZ / 10;
4550 info->closing_wait = CLOSING_WAIT_DELAY;
4551 info->icount.cts = info->icount.dsr =
4552 info->icount.rng = info->icount.dcd = 0;
4553 info->icount.rx = info->icount.tx = 0;
4554 info->icount.frame = info->icount.parity = 0;
4555 info->icount.overrun = info->icount.brk = 0;
4559 info->blocked_open = 0;
4560 info->default_threshold = 0;
4561 info->default_timeout = 0;
4562 INIT_WORK(&info->tqueue, do_softint);
4563 init_waitqueue_head(&info->open_wait);
4564 init_waitqueue_head(&info->close_wait);
4565 init_waitqueue_head(&info->shutdown_wait);
4566 init_waitqueue_head(&info->delta_msr_wait);
4569 info->read_status_mask = 0;
4571 /* Bentson's vars */
4572 info->jiffies[0] = 0;
4573 info->jiffies[1] = 0;
4574 info->jiffies[2] = 0;
4575 info->rflush_count = 0;
4576 #ifdef CONFIG_CYZ_INTR
4577 init_timer(&cyz_rx_full_timer[port]);
4578 cyz_rx_full_timer[port].function = NULL;
4581 #ifndef CONFIG_CYZ_INTR
4582 if (!timer_pending(&cyz_timerlist)) {
4583 mod_timer(&cyz_timerlist, jiffies + 1);
4585 printk("Cyclades-Z polling initialized\n");
4588 #endif /* CONFIG_CYZ_INTR */
4590 } else { /* Cyclom-Y of some kind */
4591 index = cinfo->bus_index;
4592 spin_lock_init(&cinfo->card_lock);
4593 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4594 for (port = cinfo->first_line;
4595 port < cinfo->first_line + cinfo->nports; port++) {
4596 info = &cy_port[port];
4597 info->magic = CYCLADES_MAGIC;
4598 info->type = PORT_CIRRUS;
4601 info->flags = STD_COM_FLAGS;
4603 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4605 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4607 info->cor3 = 0x08; /* _very_ small rcv threshold */
4610 info->custom_divisor = 0;
4611 info->close_delay = 5 * HZ / 10;
4612 info->closing_wait = CLOSING_WAIT_DELAY;
4613 info->icount.cts = info->icount.dsr =
4614 info->icount.rng = info->icount.dcd = 0;
4615 info->icount.rx = info->icount.tx = 0;
4616 info->icount.frame = info->icount.parity = 0;
4617 info->icount.overrun = info->icount.brk = 0;
4618 chip_number = (port - cinfo->first_line) / 4;
4619 if ((info->chip_rev =
4620 readb(cinfo->base_addr +
4621 (cy_chip_offset[chip_number] <<
4622 index) + (CyGFRCR << index))) >=
4624 /* It is a CD1400 rev. J or later */
4625 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4626 info->tco = baud_co_60[13]; /* Tx CO */
4627 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4628 info->rco = baud_co_60[13]; /* Rx CO */
4630 info->rtsdtr_inv = 1;
4632 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4633 info->tco = baud_co_25[13]; /* Tx CO */
4634 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4635 info->rco = baud_co_25[13]; /* Rx CO */
4637 info->rtsdtr_inv = 0;
4642 info->blocked_open = 0;
4643 info->default_threshold = 0;
4644 info->default_timeout = 0;
4645 INIT_WORK(&info->tqueue, do_softint);
4646 init_waitqueue_head(&info->open_wait);
4647 init_waitqueue_head(&info->close_wait);
4648 init_waitqueue_head(&info->shutdown_wait);
4649 init_waitqueue_head(&info->delta_msr_wait);
4652 info->read_status_mask =
4653 CyTIMEOUT | CySPECHAR | CyBREAK
4654 | CyPARITY | CyFRAME | CyOVERRUN;
4660 /* initialize chips on Cyclom-Y card -- return number of valid
4661 chips (which is number of ports/4) */
4662 static unsigned short __init
4663 cyy_init_card(void __iomem * true_base_addr, int index)
4665 unsigned int chip_number;
4666 void __iomem *base_addr;
4668 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4669 /* Cy_HwReset is 0x1400 */
4670 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4671 /* Cy_ClrIntr is 0x1800 */
4674 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4676 true_base_addr + (cy_chip_offset[chip_number] << index);
4678 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4680 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4681 chip_number, (unsigned long)base_addr);
4686 cy_writeb(base_addr + (CyGFRCR << index), 0);
4689 /* The Cyclom-16Y does not decode address bit 9 and therefore
4690 cannot distinguish between references to chip 0 and a non-
4691 existent chip 4. If the preceding clearing of the supposed
4692 chip 4 GFRCR register appears at chip 0, there is no chip 4
4693 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4695 if (chip_number == 4 && readb(true_base_addr +
4696 (cy_chip_offset[0] << index) +
4697 (CyGFRCR << index)) == 0) {
4701 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4704 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4706 printk(" chip #%d at %#6lx is not responding ",
4707 chip_number, (unsigned long)base_addr);
4708 printk("(GFRCR stayed 0)\n",
4712 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4715 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4717 chip_number, (unsigned long)base_addr,
4718 base_addr[CyGFRCR<<index]);
4722 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4723 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4724 /* It is a CD1400 rev. J or later */
4725 /* Impossible to reach 5ms with this chip.
4726 Changed to 2ms instead (f = 500 Hz). */
4727 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4730 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4734 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4735 chip_number, (unsigned long)base_addr,
4736 readb(base_addr+(CyGFRCR<<index)));
4740 } /* cyy_init_card */
4743 * ---------------------------------------------------------------------
4744 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4745 * sets global variables and return the number of ISA boards found.
4746 * ---------------------------------------------------------------------
4748 static int __init cy_detect_isa(void)
4751 unsigned short cy_isa_irq, nboard;
4752 void __iomem *cy_isa_address;
4753 unsigned short i, j, cy_isa_nchan;
4761 /* Check for module parameters */
4762 for (i = 0; i < NR_CARDS; i++) {
4763 if (maddr[i] || i) {
4765 cy_isa_addresses[i] = maddr[i];
4772 /* scan the address table probing for Cyclom-Y/ISA boards */
4773 for (i = 0; i < NR_ISA_ADDRS; i++) {
4774 unsigned int isa_address = cy_isa_addresses[i];
4775 if (isa_address == 0x0000) {
4779 /* probe for CD1400... */
4780 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4781 cy_isa_nchan = CyPORTS_PER_CHIP *
4782 cyy_init_card(cy_isa_address, 0);
4783 if (cy_isa_nchan == 0) {
4787 if (isparam && irq[i])
4788 cy_isa_irq = irq[i];
4791 /* find out the board's irq by probing */
4792 cy_isa_irq = detect_isa_irq(cy_isa_address);
4793 if (cy_isa_irq == 0) {
4794 printk("Cyclom-Y/ISA found at 0x%lx ",
4795 (unsigned long)cy_isa_address);
4796 printk("but the IRQ could not be detected.\n");
4800 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4801 printk("Cyclom-Y/ISA found at 0x%lx ",
4802 (unsigned long)cy_isa_address);
4803 printk("but no more channels are available.\n");
4804 printk("Change NR_PORTS in cyclades.c and recompile "
4808 /* fill the next cy_card structure available */
4809 for (j = 0; j < NR_CARDS; j++) {
4810 if (cy_card[j].base_addr == 0)
4813 if (j == NR_CARDS) { /* no more cy_cards available */
4814 printk("Cyclom-Y/ISA found at 0x%lx ",
4815 (unsigned long)cy_isa_address);
4816 printk("but no more cards can be used .\n");
4817 printk("Change NR_CARDS in cyclades.c and recompile "
4823 if (request_irq(cy_isa_irq, cyy_interrupt,
4824 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4825 printk("Cyclom-Y/ISA found at 0x%lx ",
4826 (unsigned long)cy_isa_address);
4827 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4832 cy_card[j].base_addr = cy_isa_address;
4833 cy_card[j].ctl_addr = NULL;
4834 cy_card[j].irq = (int)cy_isa_irq;
4835 cy_card[j].bus_index = 0;
4836 cy_card[j].first_line = cy_next_channel;
4837 cy_card[j].num_chips = cy_isa_nchan / 4;
4838 cy_init_card(&cy_card[j], j);
4842 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4843 j + 1, (unsigned long)cy_isa_address,
4844 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4846 printk("%d channels starting from port %d.\n",
4847 cy_isa_nchan, cy_next_channel);
4848 for (j = cy_next_channel;
4849 j < cy_next_channel + cy_isa_nchan; j++)
4850 tty_register_device(cy_serial_driver, j, NULL);
4851 cy_next_channel += cy_isa_nchan;
4856 #endif /* CONFIG_ISA */
4857 } /* cy_detect_isa */
4860 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4863 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4865 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4867 /* Reload Config. Registers from EEPROM */
4868 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4870 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4873 static int __devinit cy_init_Ze(unsigned long cy_pci_phys0,
4874 unsigned long cy_pci_phys2,
4875 struct RUNTIME_9060 __iomem *cy_pci_addr0,
4876 int cy_pci_irq, struct pci_dev *pdev)
4878 void __iomem *cy_pci_addr2;
4880 unsigned short cy_pci_nchan;
4882 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4884 readl(&cy_pci_addr0->mail_box_0);
4886 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4887 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4888 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
4891 /* This must be the new Cyclades-Ze/PCI. */
4892 cy_pci_nchan = ZE_V1_NPORTS;
4894 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4895 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
4896 "are available.\nChange NR_PORTS in cyclades.c "
4897 "and recompile kernel.\n",
4898 (ulong) cy_pci_phys2);
4902 /* fill the next cy_card structure available */
4903 for (j = 0; j < NR_CARDS; j++) {
4904 if (cy_card[j].base_addr == 0)
4907 if (j == NR_CARDS) { /* no more cy_cards available */
4908 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
4909 "cards can be used.\nChange NR_CARDS in "
4910 "cyclades.c and recompile kernel.\n",
4911 (ulong) cy_pci_phys2);
4914 #ifdef CONFIG_CYZ_INTR
4915 /* allocate IRQ only if board has an IRQ */
4916 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4917 if (request_irq(cy_pci_irq, cyz_interrupt,
4918 IRQF_SHARED, "Cyclades-Z",
4920 printk("Cyclom-Ze/PCI found at 0x%lx ",
4921 (ulong) cy_pci_phys2);
4922 printk("but could not allocate IRQ%d.\n",
4927 #endif /* CONFIG_CYZ_INTR */
4930 cy_card[j].base_phys = cy_pci_phys2;
4931 cy_card[j].ctl_phys = cy_pci_phys0;
4932 cy_card[j].base_addr = cy_pci_addr2;
4933 cy_card[j].ctl_addr = cy_pci_addr0;
4934 cy_card[j].irq = (int)cy_pci_irq;
4935 cy_card[j].bus_index = 1;
4936 cy_card[j].first_line = cy_next_channel;
4937 cy_card[j].num_chips = -1;
4938 cy_card[j].pdev = pdev;
4939 cy_init_card(&cy_card[j], j);
4940 pci_set_drvdata(pdev, &cy_card[j]);
4943 #ifdef CONFIG_CYZ_INTR
4944 /* don't report IRQ if board is no IRQ */
4945 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
4946 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4947 j + 1, (ulong) cy_pci_phys2,
4948 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
4951 #endif /* CONFIG_CYZ_INTR */
4952 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
4953 j + 1, (ulong) cy_pci_phys2,
4954 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
4956 printk("%d channels starting from port %d.\n",
4957 cy_pci_nchan, cy_next_channel);
4958 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4959 tty_register_device(cy_serial_driver, j, &pdev->dev);
4960 cy_next_channel += cy_pci_nchan;
4965 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4966 const struct pci_device_id *ent)
4968 unsigned char cyy_rev_id;
4969 unsigned char cy_pci_irq;
4970 __u32 cy_pci_phys0, cy_pci_phys2, mailbox;
4971 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4972 unsigned int device_id;
4973 unsigned short j, cy_pci_nchan, plx_ver;
4976 retval = pci_enable_device(pdev);
4978 dev_err(&pdev->dev, "cannot enable device\n");
4982 /* read PCI configuration area */
4983 cy_pci_irq = pdev->irq;
4984 cy_pci_phys0 = pci_resource_start(pdev, 0);
4985 cy_pci_phys2 = pci_resource_start(pdev, 2);
4986 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4988 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4990 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4991 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4993 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4994 pdev->bus->number, pdev->devfn);
4995 printk("rev_id=%d) IRQ%d\n",
4996 cyy_rev_id, (int)cy_pci_irq);
4997 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4999 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
5002 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5003 printk(" Warning: PCI I/O bit incorrectly "
5004 "set. Ignoring it...\n");
5005 pdev->resource[2].flags &= ~IORESOURCE_IO;
5008 /* Although we don't use this I/O region, we should
5009 request it from the kernel anyway, to avoid problems
5010 with other drivers accessing it. */
5011 retval = pci_request_regions(pdev, "Cyclom-Y");
5013 printk(KERN_ERR "cyclades: failed to reserve "
5017 #if defined(__alpha__)
5018 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
5019 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
5020 pdev->bus->number, pdev->devfn);
5021 printk("rev_id=%d) IRQ%d\n",
5022 cyy_rev_id, (int)cy_pci_irq);
5023 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
5025 (ulong)cy_pci_phys2,
5026 (ulong)cy_pci_phys0);
5027 printk("Cyclom-Y/PCI not supported for low "
5028 "addresses in Alpha systems.\n");
5032 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5033 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5036 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
5038 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
5040 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
5041 cyy_init_card(cy_pci_addr2, 1));
5042 if (cy_pci_nchan == 0) {
5043 printk("Cyclom-Y PCI host card with ");
5044 printk("no Serial-Modules at 0x%lx.\n",
5045 (ulong) cy_pci_phys2);
5048 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5049 printk("Cyclom-Y/PCI found at 0x%lx ",
5050 (ulong) cy_pci_phys2);
5051 printk("but no channels are available.\n");
5052 printk("Change NR_PORTS in cyclades.c and "
5053 "recompile kernel.\n");
5056 /* fill the next cy_card structure available */
5057 for (j = 0; j < NR_CARDS; j++) {
5058 if (cy_card[j].base_addr == 0)
5061 if (j == NR_CARDS) { /* no more cy_cards available */
5062 printk("Cyclom-Y/PCI found at 0x%lx ",
5063 (ulong) cy_pci_phys2);
5064 printk("but no more cards can be used.\n");
5065 printk("Change NR_CARDS in cyclades.c and "
5066 "recompile kernel.\n");
5071 retval = request_irq(cy_pci_irq, cyy_interrupt,
5072 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
5074 printk("Cyclom-Y/PCI found at 0x%lx ",
5075 (ulong) cy_pci_phys2);
5076 printk("but could not allocate IRQ%d.\n",
5082 cy_card[j].base_phys = (ulong) cy_pci_phys2;
5083 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
5084 cy_card[j].base_addr = cy_pci_addr2;
5085 cy_card[j].ctl_addr = cy_pci_addr0;
5086 cy_card[j].irq = (int)cy_pci_irq;
5087 cy_card[j].bus_index = 1;
5088 cy_card[j].first_line = cy_next_channel;
5089 cy_card[j].num_chips = cy_pci_nchan / 4;
5090 cy_card[j].pdev = pdev;
5091 cy_init_card(&cy_card[j], j);
5092 pci_set_drvdata(pdev, &cy_card[j]);
5094 /* enable interrupts in the PCI interface */
5095 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
5099 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
5104 default: /* Old boards, use PLX_9060 */
5106 plx_init(cy_pci_addr0, 0x6c);
5107 /* For some yet unknown reason, once the PLX9060 reloads
5108 the EEPROM, the IRQ is lost and, thus, we have to
5109 re-write it to the PCI config. registers.
5110 This will remain here until we find a permanent
5112 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
5115 cy_writew(cy_pci_addr0 + 0x68,
5116 readw(cy_pci_addr0 + 0x68) | 0x0900);
5121 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5122 j + 1, (ulong)cy_pci_phys2,
5123 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
5125 printk("%d channels starting from port %d.\n",
5126 cy_pci_nchan, cy_next_channel);
5127 for (j = cy_next_channel;
5128 j < cy_next_channel + cy_pci_nchan; j++)
5129 tty_register_device(cy_serial_driver, j, &pdev->dev);
5131 cy_next_channel += cy_pci_nchan;
5132 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5134 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5135 pdev->bus->number, pdev->devfn);
5136 printk("rev_id=%d) IRQ%d\n",
5137 cyy_rev_id, (int)cy_pci_irq);
5138 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5140 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
5141 printk("Cyclades-Z/PCI not supported for low "
5144 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5146 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5147 pdev->bus->number, pdev->devfn);
5148 printk("rev_id=%d) IRQ%d\n",
5149 cyy_rev_id, (int)cy_pci_irq);
5150 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5152 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
5154 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5156 /* Disable interrupts on the PLX before resetting it */
5157 cy_writew(cy_pci_addr0 + 0x68,
5158 readw(cy_pci_addr0 + 0x68) & ~0x0900);
5160 plx_init(cy_pci_addr0, 0x6c);
5161 /* For some yet unknown reason, once the PLX9060 reloads
5162 the EEPROM, the IRQ is lost and, thus, we have to
5163 re-write it to the PCI config. registers.
5164 This will remain here until we find a permanent
5166 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
5169 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5170 cy_pci_addr0)->mail_box_0);
5172 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5173 printk(" Warning: PCI I/O bit incorrectly "
5174 "set. Ignoring it...\n");
5175 pdev->resource[2].flags &= ~IORESOURCE_IO;
5178 /* Although we don't use this I/O region, we should
5179 request it from the kernel anyway, to avoid problems
5180 with other drivers accessing it. */
5181 retval = pci_request_regions(pdev, "Cyclades-Z");
5183 printk(KERN_ERR "cyclades: failed to reserve "
5188 if (mailbox == ZE_V1) {
5189 retval = cy_init_Ze(cy_pci_phys0, cy_pci_phys2,
5190 cy_pci_addr0, cy_pci_irq, pdev);
5193 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5197 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5199 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5200 if (mailbox == ZO_V1) {
5201 cy_writel(&((struct RUNTIME_9060 *)
5202 (cy_pci_addr0))->loc_addr_base,
5204 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5205 "%lx\n", (ulong) (0xff &
5206 readl(&((struct CUSTOM_REG *)
5207 (cy_pci_addr2))->fpga_id)),
5209 readl(&((struct CUSTOM_REG *)
5212 cy_writel(&((struct RUNTIME_9060 *)
5213 (cy_pci_addr0))->loc_addr_base,
5216 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5217 "FPGA not loaded\n");
5220 /* The following clears the firmware id word. This
5221 ensures that the driver will not attempt to talk to
5222 the board until it has been properly initialized.
5224 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5225 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5227 /* This must be a Cyclades-8Zo/PCI. The extendable
5228 version will have a different device_id and will
5229 be allocated its maximum number of ports. */
5232 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5233 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5234 "no channels are available.\nChange "
5235 "NR_PORTS in cyclades.c and recompile "
5236 "kernel.\n", (ulong)cy_pci_phys2);
5240 /* fill the next cy_card structure available */
5241 for (j = 0; j < NR_CARDS; j++) {
5242 if (cy_card[j].base_addr == 0)
5245 if (j == NR_CARDS) { /* no more cy_cards available */
5246 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5247 "no more cards can be used.\nChange "
5248 "NR_CARDS in cyclades.c and recompile "
5249 "kernel.\n", (ulong)cy_pci_phys2);
5252 #ifdef CONFIG_CYZ_INTR
5253 /* allocate IRQ only if board has an IRQ */
5254 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5255 retval = request_irq(cy_pci_irq, cyz_interrupt,
5256 IRQF_SHARED, "Cyclades-Z",
5259 printk("Cyclom-8Zo/PCI found at 0x%lx "
5260 "but could not allocate "
5261 "IRQ%d.\n", (ulong)cy_pci_phys2,
5266 #endif /* CONFIG_CYZ_INTR */
5269 cy_card[j].base_phys = cy_pci_phys2;
5270 cy_card[j].ctl_phys = cy_pci_phys0;
5271 cy_card[j].base_addr = cy_pci_addr2;
5272 cy_card[j].ctl_addr = cy_pci_addr0;
5273 cy_card[j].irq = (int)cy_pci_irq;
5274 cy_card[j].bus_index = 1;
5275 cy_card[j].first_line = cy_next_channel;
5276 cy_card[j].num_chips = -1;
5277 cy_card[j].pdev = pdev;
5278 cy_init_card(&cy_card[j], j);
5279 pci_set_drvdata(pdev, &cy_card[j]);
5282 #ifdef CONFIG_CYZ_INTR
5283 /* don't report IRQ if board is no IRQ */
5284 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5285 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5286 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5287 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5290 #endif /* CONFIG_CYZ_INTR */
5291 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5292 j + 1, (ulong)cy_pci_phys2,
5293 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5295 printk("%d channels starting from port %d.\n",
5296 cy_pci_nchan, cy_next_channel);
5297 for (j = cy_next_channel;
5298 j < cy_next_channel + cy_pci_nchan; j++)
5299 tty_register_device(cy_serial_driver, j, &pdev->dev);
5300 cy_next_channel += cy_pci_nchan;
5308 * ---------------------------------------------------------------------
5309 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
5310 * sets global variables and return the number of PCI boards found.
5311 * ---------------------------------------------------------------------
5313 static int __init cy_detect_pci(void)
5316 struct pci_dev *pdev = NULL;
5317 unsigned int i, device_id, dev_index = 0;
5319 for (i = 0; i < NR_CARDS; i++) {
5320 /* look for a Cyclades card by vendor and device id */
5321 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
5322 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
5323 device_id, pdev)) == NULL) {
5324 dev_index++; /* try next device id */
5326 break; /* found a board */
5333 i -= !!cy_pci_probe(pdev, &cy_pci_dev_id[dev_index]);
5339 #endif /* ifdef CONFIG_PCI */
5340 } /* cy_detect_pci */
5342 static void __devexit cy_pci_release(struct pci_dev *pdev)
5345 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5348 /* non-Z with old PLX */
5349 if (cinfo->num_chips != -1 && (readb(cinfo->base_addr + CyPLX_VER) &
5351 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5353 #ifndef CONFIG_CYZ_INTR
5354 if (cinfo->num_chips != -1)
5356 cy_writew(cinfo->ctl_addr + 0x68,
5357 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5359 pci_iounmap(pdev, cinfo->base_addr);
5360 if (cinfo->ctl_addr)
5361 pci_iounmap(pdev, cinfo->ctl_addr);
5363 #ifndef CONFIG_CYZ_INTR
5364 && cinfo->num_chips != -1 /* not a Z card */
5365 #endif /* CONFIG_CYZ_INTR */
5367 free_irq(cinfo->irq, cinfo);
5368 pci_release_regions(pdev);
5370 cinfo->base_addr = NULL;
5371 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5372 cy_port[i].line = -1;
5373 cy_port[i].magic = -1;
5375 for (i = cinfo->first_line; i < cinfo->first_line +
5377 tty_unregister_device(cy_serial_driver, i);
5382 * This routine prints out the appropriate serial driver version number
5383 * and identifies which options were configured into this driver.
5385 static inline void show_version(void)
5387 printk("Cyclades driver " CY_VERSION "\n");
5388 printk(" built %s %s\n", __DATE__, __TIME__);
5389 } /* show_version */
5392 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5393 int *eof, void *data)
5395 struct cyclades_port *info;
5401 __u32 cur_jifs = jiffies;
5403 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5404 "IdleIn Overruns Ldisc\n");
5409 /* Output one line for each known port */
5410 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5414 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5415 "%8lu %9lu %6ld\n", info->line,
5416 (cur_jifs - info->idle_stats.in_use) / HZ,
5417 info->idle_stats.xmit_bytes,
5418 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5419 info->idle_stats.recv_bytes,
5420 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5421 info->idle_stats.overruns,
5422 (long)info->tty->ldisc.num);
5424 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5426 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5434 if (pos > offset + length)
5439 *start = buf + (offset - begin); /* Start of wanted data */
5440 len -= (offset - begin); /* Start slop */
5442 len = length; /* Ending slop */
5448 /* The serial driver boot-time initialization code!
5449 Hardware I/O ports are mapped to character special devices on a
5450 first found, first allocated manner. That is, this code searches
5451 for Cyclom cards in the system. As each is found, it is probed
5452 to discover how many chips (and thus how many ports) are present.
5453 These ports are mapped to the tty ports 32 and upward in monotonic
5454 fashion. If an 8-port card is replaced with a 16-port card, the
5455 port mapping on a following card will shift.
5457 This approach is different from what is used in the other serial
5458 device driver because the Cyclom is more properly a multiplexer,
5459 not just an aggregation of serial ports on one card.
5461 If there are more cards with more ports than have been
5462 statically allocated above, a warning is printed and the
5463 extra ports are ignored.
5466 static const struct tty_operations cy_ops = {
5470 .put_char = cy_put_char,
5471 .flush_chars = cy_flush_chars,
5472 .write_room = cy_write_room,
5473 .chars_in_buffer = cy_chars_in_buffer,
5474 .flush_buffer = cy_flush_buffer,
5476 .throttle = cy_throttle,
5477 .unthrottle = cy_unthrottle,
5478 .set_termios = cy_set_termios,
5481 .hangup = cy_hangup,
5482 .break_ctl = cy_break,
5483 .wait_until_sent = cy_wait_until_sent,
5484 .read_proc = cyclades_get_proc_info,
5485 .tiocmget = cy_tiocmget,
5486 .tiocmset = cy_tiocmset,
5489 static int __init cy_init(void)
5491 unsigned int i, nboards;
5492 int retval = -ENOMEM;
5494 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5495 if (!cy_serial_driver)
5499 /* Initialize the tty_driver structure */
5501 cy_serial_driver->owner = THIS_MODULE;
5502 cy_serial_driver->driver_name = "cyclades";
5503 cy_serial_driver->name = "ttyC";
5504 cy_serial_driver->major = CYCLADES_MAJOR;
5505 cy_serial_driver->minor_start = 0;
5506 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5507 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5508 cy_serial_driver->init_termios = tty_std_termios;
5509 cy_serial_driver->init_termios.c_cflag =
5510 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5511 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5512 tty_set_operations(cy_serial_driver, &cy_ops);
5514 retval = tty_register_driver(cy_serial_driver);
5516 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5520 for (i = 0; i < NR_CARDS; i++) {
5521 /* base_addr=0 indicates board not found */
5522 cy_card[i].base_addr = NULL;
5525 /* invalidate remaining cy_port structures */
5526 for (i = 0; i < NR_PORTS; i++) {
5527 cy_port[i].line = -1;
5528 cy_port[i].magic = -1;
5531 /* the code below is responsible to find the boards. Each different
5532 type of board has its own detection routine. If a board is found,
5533 the next cy_card structure available is set by the detection
5534 routine. These functions are responsible for checking the
5535 availability of cy_card and cy_port data structures and updating
5536 the cy_next_channel. */
5538 /* look for isa boards */
5539 nboards = cy_detect_isa();
5541 /* look for pci boards */
5542 nboards += cy_detect_pci();
5551 tty_unregister_driver(cy_serial_driver);
5553 put_tty_driver(cy_serial_driver);
5558 static void __exit cy_cleanup_module(void)
5562 #ifndef CONFIG_CYZ_INTR
5563 del_timer_sync(&cyz_timerlist);
5564 #endif /* CONFIG_CYZ_INTR */
5566 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5567 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5570 put_tty_driver(cy_serial_driver);
5572 for (i = 0; i < NR_CARDS; i++) {
5573 if (cy_card[i].base_addr) {
5574 if (cy_card[i].pdev) {
5575 cy_pci_release(cy_card[i].pdev);
5578 /* clear interrupt */
5579 cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5580 iounmap(cy_card[i].base_addr);
5581 if (cy_card[i].ctl_addr)
5582 iounmap(cy_card[i].ctl_addr);
5584 #ifndef CONFIG_CYZ_INTR
5585 && cy_card[i].num_chips != -1 /* not a Z card */
5586 #endif /* CONFIG_CYZ_INTR */
5588 free_irq(cy_card[i].irq, &cy_card[i]);
5589 for (e1 = cy_card[i].first_line;
5590 e1 < cy_card[i].first_line +
5591 cy_card[i].nports; e1++)
5592 tty_unregister_device(cy_serial_driver, e1);
5595 } /* cy_cleanup_module */
5597 module_init(cy_init);
5598 module_exit(cy_cleanup_module);
5600 MODULE_LICENSE("GPL");