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Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[deliverable/linux.git] / drivers / char / cyclades.c
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 *
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
15 *
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
21 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
24 * $Log: cyclades.c,v $
25 * Prevent users from opening non-existing Z ports.
26 *
27 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
28 * Fixed the PCI detection function to work properly on Alpha systems.
29 * Implemented support for TIOCSERGETLSR ioctl.
30 * Implemented full support for non-standard baud rates.
31 *
32 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
33 * Request PLX I/O region, although driver doesn't use it, to avoid
34 * problems with other drivers accessing it.
35 * Removed count for on-board buffer characters in cy_chars_in_buffer
36 * (Cyclades-Z only).
37 *
38 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
39 * Driver now reports physical instead of virtual memory addresses.
40 * Masks were added to some Cyclades-Z read accesses.
41 * Implemented workaround for PLX9050 bug that would cause a system lockup
42 * in certain systems, depending on the MMIO addresses allocated to the
43 * board.
44 * Changed the Tx interrupt programming in the CD1400 chips to boost up
45 * performance (Cyclom-Y only).
46 * Code is now compliant with the new module interface (module_[init|exit]).
47 * Make use of the PCI helper functions to access PCI resources.
48 * Did some code "housekeeping".
49 *
50 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
51 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 *
53 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
54 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 *
56 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
57 * Added a new cyclades_card field called nports to allow the driver to
58 * know the exact number of ports found by the Z firmware after its load;
59 * RX buffer contention prevention logic on interrupt op mode revisited
60 * (Cyclades-Z only);
61 * Revisited printk's for Z debug;
62 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 *
64 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
65 * Fixed bug in cyz_poll that would make all ports but port 0
66 * unable to transmit/receive data (Cyclades-Z only);
67 * Implemented logic to prevent the RX buffer from being stuck with data
68 * due to a driver / firmware race condition in interrupt op mode
69 * (Cyclades-Z only);
70 * Fixed bug in block_til_ready logic that would lead to a system crash;
71 * Revisited cy_close spinlock usage;
72 *
73 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
74 * Revisited CONFIG_PCI conditional compilation for PCI board support;
75 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
76 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
77 * Removed CTS handling from the driver -- this is now completely handled
78 * by the firmware (Cyclades-Z only);
79 * Flush RX on-board buffers on a port open (Cyclades-Z only);
80 * Fixed handling of ASYNC_SPD_* TTY flags;
81 * Module unload now unmaps all memory area allocated by ioremap;
82 *
83 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
84 * Removed CY_PROC conditional compilation;
85 * Implemented SMP-awareness for the driver;
86 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * functions;
88 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
89 * (irq=NN) as parameters (only for ISA boards);
90 * Fixed bug in set_line_char that would prevent the Cyclades-Z
91 * ports from being configured at speeds above 115.2Kbps;
92 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
93 * switching from working properly;
94 * The driver now only prints IRQ info for the Cyclades-Z if it's
95 * configured to work in interrupt mode;
96 *
97 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
98 * Added support for interrupt mode operation for the Z cards;
99 * Removed the driver inactivity control for the Z;
100 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
101 * the Z firmware is not loaded yet;
102 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
103 * same functionality;
104 * Implemented workaround for IRQ setting loss on the PCI configuration
105 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 *
107 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
108 * /proc entry location changed to /proc/tty/driver/cyclades;
109 * Added support to shared IRQ's (only for PCI boards);
110 * Added support for Cobalt Qube2 systems;
111 * IRQ [de]allocation scheme revisited;
112 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * TTY facility;
114 * Fixed typo in TTY structure field 'driver_name';
115 * Included a PCI bridge reset and EEPROM reload in the board
116 * initialization code (for both Y and Z series).
117 *
118 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
119 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
120 * closed properly after a SIGINT;
121 * Module usage counter scheme revisited;
122 * Added support to the upcoming Y PCI boards (i.e., support to additional
123 * PCI Device ID's).
124 *
125 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
126 * Removed all unnecessary page-alignement operations in ioremap calls
127 * (ioremap is currently safe for these operations).
128 *
129 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
130 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
131 * order to make PLX9050-based boards work with certain motherboards.
132 *
133 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
134 * cy_close function now resets (correctly) the tty->closing flag;
135 * JIFFIES_DIFF macro fixed.
136 *
137 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
138 * Fixed bug in cy_close function, which was not informing HW of
139 * which port should have the reception disabled before doing so;
140 * fixed Cyclom-8YoP hardware detection bug.
141 *
142 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
143 * Fixed bug in cy_close function, which causes malfunction
144 * of one of the first 4 ports when a higher port is closed
145 * (Cyclom-Y only).
146 *
147 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
148 * Fixed Cyclom-4Yo hardware detection bug.
149 *
150 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
151 * /proc/cyclades implementation with great collaboration of
152 * Marc Lewis <marc@blarg.net>;
153 * cyy_interrupt was changed to avoid occurrence of kernel oopses
154 * during PPP operation.
155 *
156 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
157 * General code review in order to comply with 2.1 kernel standards;
158 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * was created);
160 * removed conditional compilation for new/old PCI structure support
161 * (now the driver only supports the new PCI structure).
162 *
163 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
164 * added conditional compilation for new/old PCI structure support;
165 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 *
167 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
168 * cleaned up the data loss fix;
169 * fixed XON/XOFF handling once more (Cyclades-Z);
170 * general review of the driver routines;
171 * introduction of a mechanism to prevent data loss with slow
172 * printers, by forcing a delay before closing the port.
173 *
174 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
175 * fixed detection/handling of new CD1400 in Ye boards;
176 * fixed XON/XOFF handling (Cyclades-Z);
177 * fixed data loss caused by a premature port close;
178 * introduction of a flag that holds the CD1400 version ID per port
179 * (used by the CYGETCD1400VER new ioctl).
180 *
181 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
182 * Code review for the module cleanup routine;
183 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
184 * includes anonymous changes regarding signal_pending.
185 *
186 * Revision 2.1 1997/11/01 17:42:41 ivan
187 * Changes in the driver to support Alpha systems (except 8Zo V_1);
188 * BREAK fix for the Cyclades-Z boards;
189 * driver inactivity control by FW implemented;
190 * introduction of flag that allows driver to take advantage of
191 * a special CD1400 feature related to HW flow control;
192 * added support for the CD1400 rev. J (Cyclom-Y boards);
193 * introduction of ioctls to:
194 * - control the rtsdtr_inv flag (Cyclom-Y);
195 * - control the rflow flag (Cyclom-Y);
196 * - adjust the polling interval (Cyclades-Z);
197 *
198 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
199 * Fixes related to kernel version conditional
200 * compilation.
201 *
202 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
203 * Compatibility issues between kernels 2.0.x and
204 * 2.1.x (mainly related to clear_bit function).
205 *
206 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
207 * Changes to define the memory window according to the
208 * board type.
209 *
210 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
211 * Changes to support new cycladesZ boards.
212 *
213 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
214 * Merge of Bentson's and Daniel's version 1.36.4.28.
215 * Corrects bug in cy_detect_pci: check if there are more
216 * ports than the number of static structs allocated.
217 * Warning message during initialization if this driver is
218 * used with the new generation of cycladesZ boards. Those
219 * will be supported only in next release of the driver.
220 * Corrects bug in cy_detect_pci and cy_detect_isa that
221 * returned wrong number of VALID boards, when a cyclomY
222 * was found with no serial modules connected.
223 * Changes to use current (2.1.x) kernel subroutine names
224 * and created macros for compilation with 2.0.x kernel,
225 * instead of the other way around.
226 *
227 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
228 * Change queue_task_irq_off to queue_task_irq.
229 * The inline function queue_task_irq_off (tqueue.h)
230 * was removed from latest releases of 2.1.x kernel.
231 * Use of macro __init to mark the initialization
232 * routines, so memory can be reused.
233 * Also incorporate implementation of critical region
234 * in function cleanup_module() created by anonymous
235 * linuxer.
236 *
237 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
238 * Change to support new firmware that solves DCD problem:
239 * application could fail to receive SIGHUP signal when DCD
240 * varying too fast.
241 *
242 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
243 * Changed for support linux versions 2.1.X.
244 * Backward compatible with linux versions 2.0.X.
245 * Corrected illegal use of filler field in
246 * CH_CTRL struct.
247 * Deleted some debug messages.
248 *
249 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
250 * Included check for NULL tty pointer in cyz_poll.
251 *
252 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
253 * Bill Foster at Blarg! Online services noticed that
254 * some of the switch elements of -Z modem control
255 * lacked a closing "break;"
256 *
257 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
258 * Changed low water threshold for buffer xmit_buf
259 *
260 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
261 * Marcio provided fix to modem status fetch for -Z
262 *
263 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
264 * improve mapping of -Z control page (thanks to Steve
265 * Price <stevep@fa.tdktca.com> for help on this)
266 *
267 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
268 * shift from CPU-bound to memcopy in cyz_polling operation
269 *
270 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
271 * Added support to set and report higher speeds.
272 *
273 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
274 * Some fixes in the HW flow control for the BETA release.
275 * Don't try to register the IRQ.
276 *
277 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
278 * make sure "cyc" appears in all kernel messages; all soft interrupts
279 * handled by same routine; recognize out-of-band reception; comment
280 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
281 * fix race condition in -Z buffer management; only -Y needs to explicitly
282 * flush chars; tidy up some startup messages;
283 *
284 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
285 * shift MOD_INC_USE_COUNT location to match
286 * serial.c; purge some diagnostic messages;
287 *
288 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
289 * enable modem status messages and fetch & process them; note
290 * time of last activity type for each port; set_line_char now
291 * supports more than line 0 and treats 0 baud correctly;
292 * get_modem_info senses rs_status;
293 *
294 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
295 * barely works--now's time to turn on
296 * more features 'til it breaks
297 *
298 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
299 * check more -Z board status; shorten boot message
300 *
301 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
302 * fix reference to ch_ctrl in startup; verify return
303 * values from cyz_issue_cmd and cyz_update_channel;
304 * more stuff to get modem control correct;
305 *
306 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
307 * more -Z stuff folded in; re-order changes to put -Z stuff
308 * after -Y stuff (to make changes clearer)
309 *
310 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
311 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
312 * Add code to send break. Clear firmware ID word at startup (so
313 * that other code won't talk to inactive board).
314 *
315 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
316 * add code for -Z in set_line_char
317 *
318 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
319 * fold more -Z stuff (or in some cases, error messages)
320 * into driver; add text to "don't know what to do" messages.
321 *
322 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
323 * moved compile-time flags near top of file; cosmetic changes
324 * to narrow text (to allow 2-up printing); changed many declarations
325 * to "static" to limit external symbols; shuffled code order to
326 * coalesce -Y and -Z specific code, also to put internal functions
327 * in order of tty_driver structure; added code to recognize -Z
328 * ports (and for moment, do nothing or report error); add cy_startup
329 * to parse boot command line for extra base addresses for ISA probes;
330 *
331 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
332 * reorder some code, fix types of some vars (int vs. long),
333 * add cy_setup to support user declared ISA addresses
334 *
335 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
336 * dump ioctl based firmware load (it's now a user level
337 * program); ensure uninitialzed ports cannot be used
338 *
339 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
340 * rename vars and restructure some code
341 *
342 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
343 * get right status back after boot load
344 *
345 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
346 * successfully loads firmware
347 *
348 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
349 * add more of the code for the boot/load ioctls
350 *
351 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
352 * start to add Z functionality--starting with ioctl
353 * for loading firmware
354 *
355 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
356 * added code to recognize Z/PCI card at initialization; report
357 * presence, but card is not initialized (because firmware needs
358 * to be loaded)
359 *
360 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
361 * starting minor number at zero; added missing verify_area
362 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
363 *
364 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
365 * remove unneeded boot message & fix CLOCAL hardware flow
366 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
367 * remove unused diagnostic statements; minor 0 is first;
368 *
369 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
370 * The kernel function vremap (available only in later 1.3.xx kernels)
371 * allows the access to memory addresses above the RAM. This revision
372 * of the driver supports PCI boards below 1Mb (device id 0x100) and
373 * above 1Mb (device id 0x101).
374 *
375 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
376 * Some global changes to interrupt handling spilled into
377 * this driver--mostly unused arguments in system function
378 * calls. Also added change by Marcio Saito which should
379 * reduce lost interrupts at startup by fast processors.
380 *
381 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
382 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
383 * in 1.3.41 kernel to remove a possible race condition, extend
384 * some error messages, and let the driver run as a loadable module
385 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
386 * possible race condition.
387 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 *
389 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
390 * Changes by Linus Torvalds in 1.3.33 kernel distribution
391 * required due to reordering of driver initialization.
392 * Drivers are now initialized *after* memory management.
393 *
394 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
395 * remove printk from ISR; fix typo
396 *
397 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
398 * Minor fixes in the PCI board support. PCI function calls in
399 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
400 * <duncan@okay.com>. "bad serial count" message removed.
401 *
402 * Revision 1.36.3 1995/08/22 09:19:42 marcio
403 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
404 * board initialization. Changes in the boot messages. The driver
405 * supports up to 4 boards and 64 ports by default.
406 *
407 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
408 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 *
410 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
411 * add missing break in modem control block in ioctl switch statement
412 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 *
414 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
415 * make sure CTS flow control is set as soon as possible (thanks
416 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 *
418 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
419 * initialize defaults for receive threshold and stale data timeout;
420 * cosmetic changes;
421 *
422 * Revision 1.36 1995/03/10 23:33:53 bentson
423 * added support of chips 4-7 in 32 port Cyclom-Ye;
424 * fix cy_interrupt pointer dereference problem
425 * (Joe Portman <baron@aa.net>);
426 * give better error response if open is attempted on non-existent port
427 * (Zachariah Vaum <jchryslr@netcom.com>);
428 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
429 * conditional compilation for -16Y on systems with fast, noisy bus;
430 * comment out diagnostic print function;
431 * cleaned up table of base addresses;
432 * set receiver time-out period register to correct value,
433 * set receive threshold to better default values,
434 * set chip timer to more accurate 200 Hz ticking,
435 * add code to monitor and modify receive parameters
436 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
437 * <njs@scifi.emi.net>);
438 *
439 * Revision 1.35 1994/12/16 13:54:18 steffen
440 * additional patch by Marcio Saito for board detection
441 * Accidently left out in 1.34
442 *
443 * Revision 1.34 1994/12/10 12:37:12 steffen
444 * This is the corrected version as suggested by Marcio Saito
445 *
446 * Revision 1.33 1994/12/01 22:41:18 bentson
447 * add hooks to support more high speeds directly; add tytso
448 * patch regarding CLOCAL wakeups
449 *
450 * Revision 1.32 1994/11/23 19:50:04 bentson
451 * allow direct kernel control of higher signalling rates;
452 * look for cards at additional locations
453 *
454 * Revision 1.31 1994/11/16 04:33:28 bentson
455 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
456 * a problem in chars_in_buffer has been resolved by some
457 * small changes; this should yield smoother output
458 *
459 * Revision 1.30 1994/11/16 04:28:05 bentson
460 * Fix from Corey Minyard, Internet: minyard@metronet.com,
461 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
462 * cy_hangup that appears to clear up much (all?) of the
463 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 *
465 * Revision 1.29 1994/11/16 04:16:07 bentson
466 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
467 * operate higher speeds in same way as other serial ports;
468 * add more serial ports (for up to two 16-port muxes).
469 *
470 * Revision 1.28 1994/11/04 00:13:16 root
471 * turn off diagnostic messages
472 *
473 * Revision 1.27 1994/11/03 23:46:37 root
474 * bunch of changes to bring driver into greater conformance
475 * with the serial.c driver (looking for missed fixes)
476 *
477 * Revision 1.26 1994/11/03 22:40:36 root
478 * automatic interrupt probing fixed.
479 *
480 * Revision 1.25 1994/11/03 20:17:02 root
481 * start to implement auto-irq
482 *
483 * Revision 1.24 1994/11/03 18:01:55 root
484 * still working on modem signals--trying not to drop DTR
485 * during the getty/login processes
486 *
487 * Revision 1.23 1994/11/03 17:51:36 root
488 * extend baud rate support; set receive threshold as function
489 * of baud rate; fix some problems with RTS/CTS;
490 *
491 * Revision 1.22 1994/11/02 18:05:35 root
492 * changed arguments to udelay to type long to get
493 * delays to be of correct duration
494 *
495 * Revision 1.21 1994/11/02 17:37:30 root
496 * employ udelay (after calibrating loops_per_second earlier
497 * in init/main.c) instead of using home-grown delay routines
498 *
499 * Revision 1.20 1994/11/02 03:11:38 root
500 * cy_chars_in_buffer forces a return value of 0 to let
501 * login work (don't know why it does); some functions
502 * that were returning EFAULT, now executes the code;
503 * more work on deciding when to disable xmit interrupts;
504 *
505 * Revision 1.19 1994/11/01 20:10:14 root
506 * define routine to start transmission interrupts (by enabling
507 * transmit interrupts); directly enable/disable modem interrupts;
508 *
509 * Revision 1.18 1994/11/01 18:40:45 bentson
510 * Don't always enable transmit interrupts in startup; interrupt on
511 * TxMpty instead of TxRdy to help characters get out before shutdown;
512 * restructure xmit interrupt to check for chars first and quit if
513 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
514 * (to my view);
515 *
516 * Revision 1.17 1994/10/30 04:39:45 bentson
517 * rename serial_driver and callout_driver to cy_serial_driver and
518 * cy_callout_driver to avoid linkage interference; initialize
519 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
520 * from cyclades_port structure; add paranoia check to cy_close;
521 *
522 * Revision 1.16 1994/10/30 01:14:33 bentson
523 * change major numbers; add some _early_ return statements;
524 *
525 * Revision 1.15 1994/10/29 06:43:15 bentson
526 * final tidying up for clean compile; enable some error reporting
527 *
528 * Revision 1.14 1994/10/28 20:30:22 Bentson
529 * lots of changes to drag the driver towards the new tty_io
530 * structures and operation. not expected to work, but may
531 * compile cleanly.
532 *
533 * Revision 1.13 1994/07/21 23:08:57 Bentson
534 * add some diagnostic cruft; support 24 lines (for testing
535 * both -8Y and -16Y cards; be more thorough in servicing all
536 * chips during interrupt; add "volatile" a few places to
537 * circumvent compiler optimizations; fix base & offset
538 * computations in block_til_ready (was causing chip 0 to
539 * stop operation)
540 *
541 * Revision 1.12 1994/07/19 16:42:11 Bentson
542 * add some hackery for kernel version 1.1.8; expand
543 * error messages; refine timing for delay loops and
544 * declare loop params volatile
545 *
546 * Revision 1.11 1994/06/11 21:53:10 bentson
547 * get use of save_car right in transmit interrupt service
548 *
549 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
550 * add some diagnostic printing; try to fix save_car stuff
551 *
552 * Revision 1.10 1994/06/11 20:36:08 bentson
553 * clean up compiler warnings
554 *
555 * Revision 1.9 1994/06/11 19:42:46 bentson
556 * added a bunch of code to support modem signalling
557 *
558 * Revision 1.8 1994/06/11 17:57:07 bentson
559 * recognize break & parity error
560 *
561 * Revision 1.7 1994/06/05 05:51:34 bentson
562 * Reorder baud table to be monotonic; add cli to CP; discard
563 * incoming characters and status if the line isn't open; start to
564 * fold code into cy_throttle; start to port get_serial_info,
565 * set_serial_info, get_modem_info, set_modem_info, and send_break
566 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
567 * get flow control characters from tty struct; invalidate ports w/o
568 * hardware;
569 *
570 * Revision 1.6 1994/05/31 18:42:21 bentson
571 * add a loop-breaker in the interrupt service routine;
572 * note when port is initialized so that it can be shut
573 * down under the right conditions; receive works without
574 * any obvious errors
575 *
576 * Revision 1.5 1994/05/30 00:55:02 bentson
577 * transmit works without obvious errors
578 *
579 * Revision 1.4 1994/05/27 18:46:27 bentson
580 * incorporated more code from lib_y.c; can now print short
581 * strings under interrupt control to port zero; seems to
582 * select ports/channels/lines correctly
583 *
584 * Revision 1.3 1994/05/25 22:12:44 bentson
585 * shifting from multi-port on a card to proper multiplexor
586 * data structures; added skeletons of most routines
587 *
588 * Revision 1.2 1994/05/19 13:21:43 bentson
589 * start to crib from other sources
590 *
591 */
592
593 #define CY_VERSION "2.5"
594
595 /* If you need to install more boards than NR_CARDS, change the constant
596 in the definition below. No other change is necessary to support up to
597 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
598
599 #define NR_CARDS 4
600
601 /*
602 If the total number of ports is larger than NR_PORTS, change this
603 constant in the definition below. No other change is necessary to
604 support more boards/ports. */
605
606 #define NR_PORTS 256
607
608 #define ZE_V1_NPORTS 64
609 #define ZO_V1 0
610 #define ZO_V2 1
611 #define ZE_V1 2
612
613 #define SERIAL_PARANOIA_CHECK
614 #undef CY_DEBUG_OPEN
615 #undef CY_DEBUG_THROTTLE
616 #undef CY_DEBUG_OTHER
617 #undef CY_DEBUG_IO
618 #undef CY_DEBUG_COUNT
619 #undef CY_DEBUG_DTR
620 #undef CY_DEBUG_WAIT_UNTIL_SENT
621 #undef CY_DEBUG_INTERRUPTS
622 #undef CY_16Y_HACK
623 #undef CY_ENABLE_MONITORING
624 #undef CY_PCI_DEBUG
625
626 /*
627 * Include section
628 */
629 #include <linux/module.h>
630 #include <linux/errno.h>
631 #include <linux/signal.h>
632 #include <linux/sched.h>
633 #include <linux/timer.h>
634 #include <linux/interrupt.h>
635 #include <linux/tty.h>
636 #include <linux/tty_flip.h>
637 #include <linux/serial.h>
638 #include <linux/major.h>
639 #include <linux/string.h>
640 #include <linux/fcntl.h>
641 #include <linux/ptrace.h>
642 #include <linux/cyclades.h>
643 #include <linux/mm.h>
644 #include <linux/ioport.h>
645 #include <linux/init.h>
646 #include <linux/delay.h>
647 #include <linux/spinlock.h>
648 #include <linux/bitops.h>
649
650 #include <asm/system.h>
651 #include <asm/io.h>
652 #include <asm/irq.h>
653 #include <asm/uaccess.h>
654
655 #include <linux/kernel.h>
656 #include <linux/pci.h>
657
658 #include <linux/stat.h>
659 #include <linux/proc_fs.h>
660
661 static void cy_throttle(struct tty_struct *tty);
662 static void cy_send_xchar(struct tty_struct *tty, char ch);
663
664 #define IS_CYC_Z(card) ((card).num_chips == -1)
665
666 #define Z_FPGA_CHECK(card) \
667 ((readl(&((struct RUNTIME_9060 __iomem *) \
668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
669
670 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
671 ((card).ctl_addr))->mail_box_0)) || \
672 Z_FPGA_CHECK(card)) && \
673 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
674 ((card).base_addr+ID_ADDRESS))->signature)))
675
676 #ifndef SERIAL_XMIT_SIZE
677 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
678 #endif
679 #define WAKEUP_CHARS 256
680
681 #define STD_COM_FLAGS (0)
682
683 static struct tty_driver *cy_serial_driver;
684
685 #ifdef CONFIG_ISA
686 /* This is the address lookup table. The driver will probe for
687 Cyclom-Y/ISA boards at all addresses in here. If you want the
688 driver to probe addresses at a different address, add it to
689 this table. If the driver is probing some other board and
690 causing problems, remove the offending address from this table.
691 The cy_setup function extracts additional addresses from the
692 boot options line. The form is "cyclades=address,address..."
693 */
694
695 static unsigned int cy_isa_addresses[] = {
696 0xD0000,
697 0xD2000,
698 0xD4000,
699 0xD6000,
700 0xD8000,
701 0xDA000,
702 0xDC000,
703 0xDE000,
704 0, 0, 0, 0, 0, 0, 0, 0
705 };
706
707 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
708
709 #ifdef MODULE
710 static long maddr[NR_CARDS];
711 static int irq[NR_CARDS];
712
713 module_param_array(maddr, long, NULL, 0);
714 module_param_array(irq, int, NULL, 0);
715 #endif
716
717 #endif /* CONFIG_ISA */
718
719 /* This is the per-card data structure containing address, irq, number of
720 channels, etc. This driver supports a maximum of NR_CARDS cards.
721 */
722 static struct cyclades_card cy_card[NR_CARDS];
723
724 static int cy_next_channel; /* next minor available */
725
726 /*
727 * This is used to look up the divisor speeds and the timeouts
728 * We're normally limited to 15 distinct baud rates. The extra
729 * are accessed via settings in info->flags.
730 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
731 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
732 * HI VHI
733 * 20
734 */
735 static int baud_table[] = {
736 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
737 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
738 230400, 0
739 };
740
741 static char baud_co_25[] = { /* 25 MHz clock option table */
742 /* value => 00 01 02 03 04 */
743 /* divide by 8 32 128 512 2048 */
744 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
745 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
746 };
747
748 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
749 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
750 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
751 };
752
753 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
754 /* value => 00 01 02 03 04 */
755 /* divide by 8 32 128 512 2048 */
756 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
757 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
758 0x00
759 };
760
761 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
762 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
763 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
764 0x21
765 };
766
767 static char baud_cor3[] = { /* receive threshold */
768 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
769 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
770 0x07
771 };
772
773 /*
774 * The Cyclades driver implements HW flow control as any serial driver.
775 * The cyclades_port structure member rflow and the vector rflow_thr
776 * allows us to take advantage of a special feature in the CD1400 to avoid
777 * data loss even when the system interrupt latency is too high. These flags
778 * are to be used only with very special applications. Setting these flags
779 * requires the use of a special cable (DTR and RTS reversed). In the new
780 * CD1400-based boards (rev. 6.00 or later), there is no need for special
781 * cables.
782 */
783
784 static char rflow_thr[] = { /* rflow threshold */
785 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
786 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
787 0x0a
788 };
789
790 /* The Cyclom-Ye has placed the sequential chips in non-sequential
791 * address order. This look-up table overcomes that problem.
792 */
793 static int cy_chip_offset[] = { 0x0000,
794 0x0400,
795 0x0800,
796 0x0C00,
797 0x0200,
798 0x0600,
799 0x0A00,
800 0x0E00
801 };
802
803 /* PCI related definitions */
804
805 #ifdef CONFIG_PCI
806 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
807 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
808 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
809 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
810 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
811 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
812 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
813 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
814 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
815 { } /* end of table */
816 };
817 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
818 #endif
819
820 static void cy_start(struct tty_struct *);
821 static void set_line_char(struct cyclades_port *);
822 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
823 #ifdef CONFIG_ISA
824 static unsigned detect_isa_irq(void __iomem *);
825 #endif /* CONFIG_ISA */
826
827 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
828
829 #ifndef CONFIG_CYZ_INTR
830 static void cyz_poll(unsigned long);
831
832 /* The Cyclades-Z polling cycle is defined by this variable */
833 static long cyz_polling_cycle = CZ_DEF_POLL;
834
835 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
836
837 #else /* CONFIG_CYZ_INTR */
838 static void cyz_rx_restart(unsigned long);
839 static struct timer_list cyz_rx_full_timer[NR_PORTS];
840 #endif /* CONFIG_CYZ_INTR */
841
842 static inline int serial_paranoia_check(struct cyclades_port *info,
843 char *name, const char *routine)
844 {
845 #ifdef SERIAL_PARANOIA_CHECK
846 if (!info) {
847 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
848 "in %s\n", name, routine);
849 return 1;
850 }
851
852 if (info->magic != CYCLADES_MAGIC) {
853 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
854 "struct (%s) in %s\n", name, routine);
855 return 1;
856 }
857 #endif
858 return 0;
859 } /* serial_paranoia_check */
860
861 /*
862 * This routine is used by the interrupt handler to schedule
863 * processing in the software interrupt portion of the driver
864 * (also known as the "bottom half"). This can be called any
865 * number of times for any channel without harm.
866 */
867 static inline void cy_sched_event(struct cyclades_port *info, int event)
868 {
869 info->event |= 1 << event; /* remember what kind of event and who */
870 schedule_work(&info->tqueue);
871 } /* cy_sched_event */
872
873 /*
874 * This routine is used to handle the "bottom half" processing for the
875 * serial driver, known also the "software interrupt" processing.
876 * This processing is done at the kernel interrupt level, after the
877 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
878 * is where time-consuming activities which can not be done in the
879 * interrupt driver proper are done; the interrupt driver schedules
880 * them using cy_sched_event(), and they get done here.
881 *
882 * This is done through one level of indirection--the task queue.
883 * When a hardware interrupt service routine wants service by the
884 * driver's bottom half, it enqueues the appropriate tq_struct (one
885 * per port) to the keventd work queue and sets a request flag
886 * that the work queue be processed.
887 *
888 * Although this may seem unwieldy, it gives the system a way to
889 * pass an argument (in this case the pointer to the cyclades_port
890 * structure) to the bottom half of the driver. Previous kernels
891 * had to poll every port to see if that port needed servicing.
892 */
893 static void
894 do_softint(struct work_struct *work)
895 {
896 struct cyclades_port *info =
897 container_of(work, struct cyclades_port, tqueue);
898 struct tty_struct *tty;
899
900 tty = info->tty;
901 if (!tty)
902 return;
903
904 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
905 tty_hangup(info->tty);
906 wake_up_interruptible(&info->open_wait);
907 info->flags &= ~ASYNC_NORMAL_ACTIVE;
908 }
909 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
910 wake_up_interruptible(&info->open_wait);
911 #ifdef CONFIG_CYZ_INTR
912 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
913 !timer_pending(&cyz_rx_full_timer[info->line]))
914 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
915 #endif
916 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
917 wake_up_interruptible(&info->delta_msr_wait);
918 tty_wakeup(tty);
919 #ifdef Z_WAKE
920 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
921 complete(&info->shutdown_wait);
922 #endif
923 } /* do_softint */
924
925
926 /***********************************************************/
927 /********* Start of block of Cyclom-Y specific code ********/
928
929 /* This routine waits up to 1000 micro-seconds for the previous
930 command to the Cirrus chip to complete and then issues the
931 new command. An error is returned if the previous command
932 didn't finish within the time limit.
933
934 This function is only called from inside spinlock-protected code.
935 */
936 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
937 {
938 unsigned int i;
939
940 /* Check to see that the previous command has completed */
941 for (i = 0; i < 100; i++) {
942 if (readb(base_addr + (CyCCR << index)) == 0) {
943 break;
944 }
945 udelay(10L);
946 }
947 /* if the CCR never cleared, the previous command
948 didn't finish within the "reasonable time" */
949 if (i == 100)
950 return -1;
951
952 /* Issue the new command */
953 cy_writeb(base_addr + (CyCCR << index), cmd);
954
955 return 0;
956 } /* cyy_issue_cmd */
957
958 #ifdef CONFIG_ISA
959 /* ISA interrupt detection code */
960 static unsigned detect_isa_irq(void __iomem * address)
961 {
962 int irq;
963 unsigned long irqs, flags;
964 int save_xir, save_car;
965 int index = 0; /* IRQ probing is only for ISA */
966
967 /* forget possible initially masked and pending IRQ */
968 irq = probe_irq_off(probe_irq_on());
969
970 /* Clear interrupts on the board first */
971 cy_writeb(address + (Cy_ClrIntr << index), 0);
972 /* Cy_ClrIntr is 0x1800 */
973
974 irqs = probe_irq_on();
975 /* Wait ... */
976 udelay(5000L);
977
978 /* Enable the Tx interrupts on the CD1400 */
979 local_irq_save(flags);
980 cy_writeb(address + (CyCAR << index), 0);
981 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
982
983 cy_writeb(address + (CyCAR << index), 0);
984 cy_writeb(address + (CySRER << index),
985 readb(address + (CySRER << index)) | CyTxRdy);
986 local_irq_restore(flags);
987
988 /* Wait ... */
989 udelay(5000L);
990
991 /* Check which interrupt is in use */
992 irq = probe_irq_off(irqs);
993
994 /* Clean up */
995 save_xir = (u_char) readb(address + (CyTIR << index));
996 save_car = readb(address + (CyCAR << index));
997 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
998 cy_writeb(address + (CySRER << index),
999 readb(address + (CySRER << index)) & ~CyTxRdy);
1000 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1001 cy_writeb(address + (CyCAR << index), (save_car));
1002 cy_writeb(address + (Cy_ClrIntr << index), 0);
1003 /* Cy_ClrIntr is 0x1800 */
1004
1005 return (irq > 0) ? irq : 0;
1006 }
1007 #endif /* CONFIG_ISA */
1008
1009 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1010 void __iomem * base_addr, int status, int index)
1011 {
1012 struct cyclades_port *info;
1013 struct tty_struct *tty;
1014 int char_count;
1015 int j, len, mdm_change, mdm_status, outch;
1016 int save_xir, channel, save_car;
1017 char data;
1018
1019 if (status & CySRReceive) { /* reception interrupt */
1020 #ifdef CY_DEBUG_INTERRUPTS
1021 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1022 #endif
1023 /* determine the channel & change to that context */
1024 spin_lock(&cinfo->card_lock);
1025 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1026 channel = (u_short) (save_xir & CyIRChannel);
1027 info = &cinfo->ports[channel + chip * 4];
1028 save_car = readb(base_addr + (CyCAR << index));
1029 cy_writeb(base_addr + (CyCAR << index), save_xir);
1030
1031 /* if there is nowhere to put the data, discard it */
1032 if (info->tty == NULL) {
1033 j = (readb(base_addr + (CyRIVR << index)) &
1034 CyIVRMask);
1035 if (j == CyIVRRxEx) { /* exception */
1036 data = readb(base_addr + (CyRDSR << index));
1037 } else { /* normal character reception */
1038 char_count = readb(base_addr +
1039 (CyRDCR << index));
1040 while (char_count--) {
1041 data = readb(base_addr +
1042 (CyRDSR << index));
1043 }
1044 }
1045 } else { /* there is an open port for this data */
1046 tty = info->tty;
1047 j = (readb(base_addr + (CyRIVR << index)) &
1048 CyIVRMask);
1049 if (j == CyIVRRxEx) { /* exception */
1050 data = readb(base_addr + (CyRDSR << index));
1051
1052 /* For statistics only */
1053 if (data & CyBREAK)
1054 info->icount.brk++;
1055 else if (data & CyFRAME)
1056 info->icount.frame++;
1057 else if (data & CyPARITY)
1058 info->icount.parity++;
1059 else if (data & CyOVERRUN)
1060 info->icount.overrun++;
1061
1062 if (data & info->ignore_status_mask) {
1063 info->icount.rx++;
1064 return;
1065 }
1066 if (tty_buffer_request_room(tty, 1)) {
1067 if (data & info->read_status_mask) {
1068 if (data & CyBREAK) {
1069 tty_insert_flip_char(
1070 tty,
1071 readb(
1072 base_addr +
1073 (CyRDSR <<
1074 index)),
1075 TTY_BREAK);
1076 info->icount.rx++;
1077 if (info->flags &
1078 ASYNC_SAK) {
1079 do_SAK(tty);
1080 }
1081 } else if (data & CyFRAME) {
1082 tty_insert_flip_char(
1083 tty,
1084 readb(
1085 base_addr +
1086 (CyRDSR <<
1087 index)),
1088 TTY_FRAME);
1089 info->icount.rx++;
1090 info->idle_stats.
1091 frame_errs++;
1092 } else if (data & CyPARITY) {
1093 /* Pieces of seven... */
1094 tty_insert_flip_char(
1095 tty,
1096 readb(
1097 base_addr +
1098 (CyRDSR <<
1099 index)),
1100 TTY_PARITY);
1101 info->icount.rx++;
1102 info->idle_stats.
1103 parity_errs++;
1104 } else if (data & CyOVERRUN) {
1105 tty_insert_flip_char(
1106 tty, 0,
1107 TTY_OVERRUN);
1108 info->icount.rx++;
1109 /* If the flip buffer itself is
1110 overflowing, we still lose
1111 the next incoming character.
1112 */
1113 tty_insert_flip_char(
1114 tty,
1115 readb(
1116 base_addr +
1117 (CyRDSR <<
1118 index)),
1119 TTY_FRAME);
1120 info->icount.rx++;
1121 info->idle_stats.
1122 overruns++;
1123 /* These two conditions may imply */
1124 /* a normal read should be done. */
1125 /* }else if(data & CyTIMEOUT){ */
1126 /* }else if(data & CySPECHAR){ */
1127 } else {
1128 tty_insert_flip_char(
1129 tty, 0,
1130 TTY_NORMAL);
1131 info->icount.rx++;
1132 }
1133 } else {
1134 tty_insert_flip_char(tty, 0,
1135 TTY_NORMAL);
1136 info->icount.rx++;
1137 }
1138 } else {
1139 /* there was a software buffer
1140 overrun and nothing could be
1141 done about it!!! */
1142 info->icount.buf_overrun++;
1143 info->idle_stats.overruns++;
1144 }
1145 } else { /* normal character reception */
1146 /* load # chars available from the chip */
1147 char_count = readb(base_addr +
1148 (CyRDCR << index));
1149
1150 #ifdef CY_ENABLE_MONITORING
1151 ++info->mon.int_count;
1152 info->mon.char_count += char_count;
1153 if (char_count > info->mon.char_max)
1154 info->mon.char_max = char_count;
1155 info->mon.char_last = char_count;
1156 #endif
1157 len = tty_buffer_request_room(tty, char_count);
1158 while (len--) {
1159 data = readb(base_addr +
1160 (CyRDSR << index));
1161 tty_insert_flip_char(tty, data,
1162 TTY_NORMAL);
1163 info->idle_stats.recv_bytes++;
1164 info->icount.rx++;
1165 #ifdef CY_16Y_HACK
1166 udelay(10L);
1167 #endif
1168 }
1169 info->idle_stats.recv_idle = jiffies;
1170 }
1171 tty_schedule_flip(tty);
1172 }
1173 /* end of service */
1174 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1175 cy_writeb(base_addr + (CyCAR << index), (save_car));
1176 spin_unlock(&cinfo->card_lock);
1177 }
1178
1179 if (status & CySRTransmit) { /* transmission interrupt */
1180 /* Since we only get here when the transmit buffer
1181 is empty, we know we can always stuff a dozen
1182 characters. */
1183 #ifdef CY_DEBUG_INTERRUPTS
1184 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1185 #endif
1186
1187 /* determine the channel & change to that context */
1188 spin_lock(&cinfo->card_lock);
1189 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1190 channel = (u_short) (save_xir & CyIRChannel);
1191 save_car = readb(base_addr + (CyCAR << index));
1192 cy_writeb(base_addr + (CyCAR << index), save_xir);
1193
1194 /* validate the port# (as configured and open) */
1195 if (channel + chip * 4 >= cinfo->nports) {
1196 cy_writeb(base_addr + (CySRER << index),
1197 readb(base_addr + (CySRER << index)) &
1198 ~CyTxRdy);
1199 goto txend;
1200 }
1201 info = &cinfo->ports[channel + chip * 4];
1202 if (info->tty == NULL) {
1203 cy_writeb(base_addr + (CySRER << index),
1204 readb(base_addr + (CySRER << index)) &
1205 ~CyTxRdy);
1206 goto txdone;
1207 }
1208
1209 /* load the on-chip space for outbound data */
1210 char_count = info->xmit_fifo_size;
1211
1212 if (info->x_char) { /* send special char */
1213 outch = info->x_char;
1214 cy_writeb(base_addr + (CyTDR << index), outch);
1215 char_count--;
1216 info->icount.tx++;
1217 info->x_char = 0;
1218 }
1219
1220 if (info->breakon || info->breakoff) {
1221 if (info->breakon) {
1222 cy_writeb(base_addr + (CyTDR << index), 0);
1223 cy_writeb(base_addr + (CyTDR << index), 0x81);
1224 info->breakon = 0;
1225 char_count -= 2;
1226 }
1227 if (info->breakoff) {
1228 cy_writeb(base_addr + (CyTDR << index), 0);
1229 cy_writeb(base_addr + (CyTDR << index), 0x83);
1230 info->breakoff = 0;
1231 char_count -= 2;
1232 }
1233 }
1234
1235 while (char_count-- > 0) {
1236 if (!info->xmit_cnt) {
1237 if (readb(base_addr + (CySRER << index)) &
1238 CyTxMpty) {
1239 cy_writeb(base_addr + (CySRER << index),
1240 readb(base_addr +
1241 (CySRER << index)) &
1242 ~CyTxMpty);
1243 } else {
1244 cy_writeb(base_addr + (CySRER << index),
1245 (readb(base_addr +
1246 (CySRER << index)) &
1247 ~CyTxRdy) | CyTxMpty);
1248 }
1249 goto txdone;
1250 }
1251 if (info->xmit_buf == NULL) {
1252 cy_writeb(base_addr + (CySRER << index),
1253 readb(base_addr + (CySRER << index)) &
1254 ~CyTxRdy);
1255 goto txdone;
1256 }
1257 if (info->tty->stopped || info->tty->hw_stopped) {
1258 cy_writeb(base_addr + (CySRER << index),
1259 readb(base_addr + (CySRER << index)) &
1260 ~CyTxRdy);
1261 goto txdone;
1262 }
1263 /* Because the Embedded Transmit Commands have
1264 been enabled, we must check to see if the
1265 escape character, NULL, is being sent. If it
1266 is, we must ensure that there is room for it
1267 to be doubled in the output stream. Therefore
1268 we no longer advance the pointer when the
1269 character is fetched, but rather wait until
1270 after the check for a NULL output character.
1271 This is necessary because there may not be
1272 room for the two chars needed to send a NULL.)
1273 */
1274 outch = info->xmit_buf[info->xmit_tail];
1275 if (outch) {
1276 info->xmit_cnt--;
1277 info->xmit_tail = (info->xmit_tail + 1) &
1278 (SERIAL_XMIT_SIZE - 1);
1279 cy_writeb(base_addr + (CyTDR << index), outch);
1280 info->icount.tx++;
1281 } else {
1282 if (char_count > 1) {
1283 info->xmit_cnt--;
1284 info->xmit_tail = (info->xmit_tail + 1)&
1285 (SERIAL_XMIT_SIZE - 1);
1286 cy_writeb(base_addr + (CyTDR << index),
1287 outch);
1288 cy_writeb(base_addr + (CyTDR << index),
1289 0);
1290 info->icount.tx++;
1291 char_count--;
1292 }
1293 }
1294 }
1295
1296 txdone:
1297 if (info->xmit_cnt < WAKEUP_CHARS) {
1298 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1299 }
1300 txend:
1301 /* end of service */
1302 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1303 cy_writeb(base_addr + (CyCAR << index), (save_car));
1304 spin_unlock(&cinfo->card_lock);
1305 }
1306
1307 if (status & CySRModem) { /* modem interrupt */
1308
1309 /* determine the channel & change to that context */
1310 spin_lock(&cinfo->card_lock);
1311 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1312 channel = (u_short) (save_xir & CyIRChannel);
1313 info = &cinfo->ports[channel + chip * 4];
1314 save_car = readb(base_addr + (CyCAR << index));
1315 cy_writeb(base_addr + (CyCAR << index), save_xir);
1316
1317 mdm_change = readb(base_addr + (CyMISR << index));
1318 mdm_status = readb(base_addr + (CyMSVR1 << index));
1319
1320 if (info->tty) {
1321 if (mdm_change & CyANY_DELTA) {
1322 /* For statistics only */
1323 if (mdm_change & CyDCD)
1324 info->icount.dcd++;
1325 if (mdm_change & CyCTS)
1326 info->icount.cts++;
1327 if (mdm_change & CyDSR)
1328 info->icount.dsr++;
1329 if (mdm_change & CyRI)
1330 info->icount.rng++;
1331
1332 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1333 }
1334
1335 if ((mdm_change & CyDCD) &&
1336 (info->flags & ASYNC_CHECK_CD)) {
1337 if (mdm_status & CyDCD) {
1338 cy_sched_event(info,
1339 Cy_EVENT_OPEN_WAKEUP);
1340 } else {
1341 cy_sched_event(info, Cy_EVENT_HANGUP);
1342 }
1343 }
1344 if ((mdm_change & CyCTS) &&
1345 (info->flags & ASYNC_CTS_FLOW)) {
1346 if (info->tty->hw_stopped) {
1347 if (mdm_status & CyCTS) {
1348 /* cy_start isn't used
1349 because... !!! */
1350 info->tty->hw_stopped = 0;
1351 cy_writeb(base_addr +
1352 (CySRER << index),
1353 readb(base_addr +
1354 (CySRER <<
1355 index))|
1356 CyTxRdy);
1357 cy_sched_event(info,
1358 Cy_EVENT_WRITE_WAKEUP);
1359 }
1360 } else {
1361 if (!(mdm_status & CyCTS)) {
1362 /* cy_stop isn't used
1363 because ... !!! */
1364 info->tty->hw_stopped = 1;
1365 cy_writeb(base_addr +
1366 (CySRER << index),
1367 readb(base_addr +
1368 (CySRER <<
1369 index)) &
1370 ~CyTxRdy);
1371 }
1372 }
1373 }
1374 /* if (mdm_change & CyDSR) {
1375 }
1376 if (mdm_change & CyRI) {
1377 }*/
1378 }
1379 /* end of service */
1380 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1381 cy_writeb(base_addr + (CyCAR << index), save_car);
1382 spin_unlock(&cinfo->card_lock);
1383 }
1384 }
1385
1386 /* The real interrupt service routine is called
1387 whenever the card wants its hand held--chars
1388 received, out buffer empty, modem change, etc.
1389 */
1390 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1391 {
1392 int status;
1393 struct cyclades_card *cinfo = dev_id;
1394 void __iomem *base_addr, *card_base_addr;
1395 int chip;
1396 int index;
1397 int too_many;
1398 int had_work;
1399
1400 if (unlikely(cinfo == NULL)) {
1401 #ifdef CY_DEBUG_INTERRUPTS
1402 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1403 #endif
1404 return IRQ_NONE; /* spurious interrupt */
1405 }
1406
1407 card_base_addr = cinfo->base_addr;
1408 index = cinfo->bus_index;
1409
1410 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1411 if (unlikely(card_base_addr == NULL))
1412 return IRQ_HANDLED;
1413
1414 /* This loop checks all chips in the card. Make a note whenever
1415 _any_ chip had some work to do, as this is considered an
1416 indication that there will be more to do. Only when no chip
1417 has any work does this outermost loop exit.
1418 */
1419 do {
1420 had_work = 0;
1421 for (chip = 0; chip < cinfo->num_chips; chip++) {
1422 base_addr = cinfo->base_addr +
1423 (cy_chip_offset[chip] << index);
1424 too_many = 0;
1425 while ((status = readb(base_addr +
1426 (CySVRR << index))) != 0x00) {
1427 had_work++;
1428 /* The purpose of the following test is to ensure that
1429 no chip can monopolize the driver. This forces the
1430 chips to be checked in a round-robin fashion (after
1431 draining each of a bunch (1000) of characters).
1432 */
1433 if (1000 < too_many++) {
1434 break;
1435 }
1436 cyy_intr_chip(cinfo, chip, base_addr, status,
1437 index);
1438 }
1439 }
1440 } while (had_work);
1441
1442 /* clear interrupts */
1443 spin_lock(&cinfo->card_lock);
1444 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1445 /* Cy_ClrIntr is 0x1800 */
1446 spin_unlock(&cinfo->card_lock);
1447 return IRQ_HANDLED;
1448 } /* cyy_interrupt */
1449
1450 /***********************************************************/
1451 /********* End of block of Cyclom-Y specific code **********/
1452 /******** Start of block of Cyclades-Z specific code *********/
1453 /***********************************************************/
1454
1455 static int
1456 cyz_fetch_msg(struct cyclades_card *cinfo,
1457 __u32 * channel, __u8 * cmd, __u32 * param)
1458 {
1459 struct FIRM_ID __iomem *firm_id;
1460 struct ZFW_CTRL __iomem *zfw_ctrl;
1461 struct BOARD_CTRL __iomem *board_ctrl;
1462 unsigned long loc_doorbell;
1463
1464 firm_id = cinfo->base_addr + ID_ADDRESS;
1465 if (!ISZLOADED(*cinfo)) {
1466 return -1;
1467 }
1468 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1469 board_ctrl = &zfw_ctrl->board_ctrl;
1470
1471 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1472 (cinfo->ctl_addr))->loc_doorbell);
1473 if (loc_doorbell) {
1474 *cmd = (char)(0xff & loc_doorbell);
1475 *channel = readl(&board_ctrl->fwcmd_channel);
1476 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1477 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1478 loc_doorbell, 0xffffffff);
1479 return 1;
1480 }
1481 return 0;
1482 } /* cyz_fetch_msg */
1483
1484 static int
1485 cyz_issue_cmd(struct cyclades_card *cinfo,
1486 __u32 channel, __u8 cmd, __u32 param)
1487 {
1488 struct FIRM_ID __iomem *firm_id;
1489 struct ZFW_CTRL __iomem *zfw_ctrl;
1490 struct BOARD_CTRL __iomem *board_ctrl;
1491 __u32 __iomem *pci_doorbell;
1492 int index;
1493
1494 firm_id = cinfo->base_addr + ID_ADDRESS;
1495 if (!ISZLOADED(*cinfo)) {
1496 return -1;
1497 }
1498 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1499 board_ctrl = &zfw_ctrl->board_ctrl;
1500
1501 index = 0;
1502 pci_doorbell =
1503 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1504 while ((readl(pci_doorbell) & 0xff) != 0) {
1505 if (index++ == 1000) {
1506 return (int)(readl(pci_doorbell) & 0xff);
1507 }
1508 udelay(50L);
1509 }
1510 cy_writel(&board_ctrl->hcmd_channel, channel);
1511 cy_writel(&board_ctrl->hcmd_param, param);
1512 cy_writel(pci_doorbell, (long)cmd);
1513
1514 return 0;
1515 } /* cyz_issue_cmd */
1516
1517 static void
1518 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1519 struct BUF_CTRL __iomem *buf_ctrl)
1520 {
1521 struct cyclades_card *cinfo = info->card;
1522 struct tty_struct *tty = info->tty;
1523 int char_count;
1524 int len;
1525 #ifdef BLOCKMOVE
1526 unsigned char *buf;
1527 #else
1528 char data;
1529 #endif
1530 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1531
1532 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1533 rx_put = readl(&buf_ctrl->rx_put);
1534 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1535 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1536 if (rx_put >= rx_get)
1537 char_count = rx_put - rx_get;
1538 else
1539 char_count = rx_put - rx_get + rx_bufsize;
1540
1541 if (char_count) {
1542 #ifdef CY_ENABLE_MONITORING
1543 info->mon.int_count++;
1544 info->mon.char_count += char_count;
1545 if (char_count > info->mon.char_max)
1546 info->mon.char_max = char_count;
1547 info->mon.char_last = char_count;
1548 #endif
1549 if (tty == NULL) {
1550 /* flush received characters */
1551 new_rx_get = (new_rx_get + char_count) &
1552 (rx_bufsize - 1);
1553 info->rflush_count++;
1554 } else {
1555 #ifdef BLOCKMOVE
1556 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1557 for performance, but because of buffer boundaries, there
1558 may be several steps to the operation */
1559 while (1) {
1560 len = tty_prepare_flip_string(tty, &buf,
1561 char_count);
1562 if (!len)
1563 break;
1564
1565 len = min_t(unsigned int, min(len, char_count),
1566 rx_bufsize - new_rx_get);
1567
1568 memcpy_fromio(buf, cinfo->base_addr +
1569 rx_bufaddr + new_rx_get, len);
1570
1571 new_rx_get = (new_rx_get + len) &
1572 (rx_bufsize - 1);
1573 char_count -= len;
1574 info->icount.rx += len;
1575 info->idle_stats.recv_bytes += len;
1576 }
1577 #else
1578 len = tty_buffer_request_room(tty, char_count);
1579 while (len--) {
1580 data = readb(cinfo->base_addr + rx_bufaddr +
1581 new_rx_get);
1582 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1583 tty_insert_flip_char(tty, data, TTY_NORMAL);
1584 info->idle_stats.recv_bytes++;
1585 info->icount.rx++;
1586 }
1587 #endif
1588 #ifdef CONFIG_CYZ_INTR
1589 /* Recalculate the number of chars in the RX buffer and issue
1590 a cmd in case it's higher than the RX high water mark */
1591 rx_put = readl(&buf_ctrl->rx_put);
1592 if (rx_put >= rx_get)
1593 char_count = rx_put - rx_get;
1594 else
1595 char_count = rx_put - rx_get + rx_bufsize;
1596 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1597 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1598 }
1599 #endif
1600 info->idle_stats.recv_idle = jiffies;
1601 tty_schedule_flip(tty);
1602 }
1603 /* Update rx_get */
1604 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1605 }
1606 }
1607
1608 static void
1609 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1610 struct BUF_CTRL __iomem *buf_ctrl)
1611 {
1612 struct cyclades_card *cinfo = info->card;
1613 struct tty_struct *tty = info->tty;
1614 char data;
1615 int char_count;
1616 #ifdef BLOCKMOVE
1617 int small_count;
1618 #endif
1619 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1620
1621 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1622 return;
1623
1624 tx_get = readl(&buf_ctrl->tx_get);
1625 tx_put = readl(&buf_ctrl->tx_put);
1626 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1627 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1628 if (tx_put >= tx_get)
1629 char_count = tx_get - tx_put - 1 + tx_bufsize;
1630 else
1631 char_count = tx_get - tx_put - 1;
1632
1633 if (char_count) {
1634
1635 if (tty == NULL)
1636 goto ztxdone;
1637
1638 if (info->x_char) { /* send special char */
1639 data = info->x_char;
1640
1641 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1642 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1643 info->x_char = 0;
1644 char_count--;
1645 info->icount.tx++;
1646 }
1647 #ifdef BLOCKMOVE
1648 while (0 < (small_count = min_t(unsigned int,
1649 tx_bufsize - tx_put, min_t(unsigned int,
1650 (SERIAL_XMIT_SIZE - info->xmit_tail),
1651 min_t(unsigned int, info->xmit_cnt,
1652 char_count))))) {
1653
1654 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1655 tx_put),
1656 &info->xmit_buf[info->xmit_tail],
1657 small_count);
1658
1659 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1660 char_count -= small_count;
1661 info->icount.tx += small_count;
1662 info->xmit_cnt -= small_count;
1663 info->xmit_tail = (info->xmit_tail + small_count) &
1664 (SERIAL_XMIT_SIZE - 1);
1665 }
1666 #else
1667 while (info->xmit_cnt && char_count) {
1668 data = info->xmit_buf[info->xmit_tail];
1669 info->xmit_cnt--;
1670 info->xmit_tail = (info->xmit_tail + 1) &
1671 (SERIAL_XMIT_SIZE - 1);
1672
1673 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1674 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1675 char_count--;
1676 info->icount.tx++;
1677 }
1678 #endif
1679 ztxdone:
1680 if (info->xmit_cnt < WAKEUP_CHARS) {
1681 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1682 }
1683 /* Update tx_put */
1684 cy_writel(&buf_ctrl->tx_put, tx_put);
1685 }
1686 }
1687
1688 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1689 {
1690 struct tty_struct *tty;
1691 struct cyclades_port *info;
1692 static struct FIRM_ID __iomem *firm_id;
1693 static struct ZFW_CTRL __iomem *zfw_ctrl;
1694 static struct BOARD_CTRL __iomem *board_ctrl;
1695 static struct CH_CTRL __iomem *ch_ctrl;
1696 static struct BUF_CTRL __iomem *buf_ctrl;
1697 __u32 channel;
1698 __u8 cmd;
1699 __u32 param;
1700 __u32 hw_ver, fw_ver;
1701 int special_count;
1702 int delta_count;
1703
1704 firm_id = cinfo->base_addr + ID_ADDRESS;
1705 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1706 board_ctrl = &zfw_ctrl->board_ctrl;
1707 fw_ver = readl(&board_ctrl->fw_version);
1708 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1709 mail_box_0);
1710
1711 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1712 special_count = 0;
1713 delta_count = 0;
1714 info = &cinfo->ports[channel];
1715 if ((tty = info->tty) == NULL)
1716 continue;
1717
1718 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1719 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1720
1721 switch (cmd) {
1722 case C_CM_PR_ERROR:
1723 tty_insert_flip_char(tty, 0, TTY_PARITY);
1724 info->icount.rx++;
1725 special_count++;
1726 break;
1727 case C_CM_FR_ERROR:
1728 tty_insert_flip_char(tty, 0, TTY_FRAME);
1729 info->icount.rx++;
1730 special_count++;
1731 break;
1732 case C_CM_RXBRK:
1733 tty_insert_flip_char(tty, 0, TTY_BREAK);
1734 info->icount.rx++;
1735 special_count++;
1736 break;
1737 case C_CM_MDCD:
1738 info->icount.dcd++;
1739 delta_count++;
1740 if (info->flags & ASYNC_CHECK_CD) {
1741 if ((fw_ver > 241 ? ((u_long) param) :
1742 readl(&ch_ctrl->rs_status)) &
1743 C_RS_DCD) {
1744 cy_sched_event(info,
1745 Cy_EVENT_OPEN_WAKEUP);
1746 } else {
1747 cy_sched_event(info, Cy_EVENT_HANGUP);
1748 }
1749 }
1750 break;
1751 case C_CM_MCTS:
1752 info->icount.cts++;
1753 delta_count++;
1754 break;
1755 case C_CM_MRI:
1756 info->icount.rng++;
1757 delta_count++;
1758 break;
1759 case C_CM_MDSR:
1760 info->icount.dsr++;
1761 delta_count++;
1762 break;
1763 #ifdef Z_WAKE
1764 case C_CM_IOCTLW:
1765 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1766 break;
1767 #endif
1768 #ifdef CONFIG_CYZ_INTR
1769 case C_CM_RXHIWM:
1770 case C_CM_RXNNDT:
1771 case C_CM_INTBACK2:
1772 /* Reception Interrupt */
1773 #ifdef CY_DEBUG_INTERRUPTS
1774 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1775 "port %ld\n", info->card, channel);
1776 #endif
1777 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1778 break;
1779 case C_CM_TXBEMPTY:
1780 case C_CM_TXLOWWM:
1781 case C_CM_INTBACK:
1782 /* Transmission Interrupt */
1783 #ifdef CY_DEBUG_INTERRUPTS
1784 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1785 "port %ld\n", info->card, channel);
1786 #endif
1787 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1788 break;
1789 #endif /* CONFIG_CYZ_INTR */
1790 case C_CM_FATAL:
1791 /* should do something with this !!! */
1792 break;
1793 default:
1794 break;
1795 }
1796 if (delta_count)
1797 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1798 if (special_count)
1799 tty_schedule_flip(tty);
1800 }
1801 }
1802
1803 #ifdef CONFIG_CYZ_INTR
1804 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1805 {
1806 struct cyclades_card *cinfo = dev_id;
1807
1808 if (unlikely(cinfo == NULL)) {
1809 #ifdef CY_DEBUG_INTERRUPTS
1810 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1811 #endif
1812 return IRQ_NONE; /* spurious interrupt */
1813 }
1814
1815 if (unlikely(!ISZLOADED(*cinfo))) {
1816 #ifdef CY_DEBUG_INTERRUPTS
1817 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1818 "(IRQ%d).\n", irq);
1819 #endif
1820 return IRQ_NONE;
1821 }
1822
1823 /* Handle the interrupts */
1824 cyz_handle_cmd(cinfo);
1825
1826 return IRQ_HANDLED;
1827 } /* cyz_interrupt */
1828
1829 static void cyz_rx_restart(unsigned long arg)
1830 {
1831 struct cyclades_port *info = (struct cyclades_port *)arg;
1832 struct cyclades_card *card = info->card;
1833 int retval;
1834 __u32 channel = info->line - card->first_line;
1835 unsigned long flags;
1836
1837 spin_lock_irqsave(&card->card_lock, flags);
1838 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1839 if (retval != 0) {
1840 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1841 info->line, retval);
1842 }
1843 spin_unlock_irqrestore(&card->card_lock, flags);
1844 }
1845
1846 #else /* CONFIG_CYZ_INTR */
1847
1848 static void cyz_poll(unsigned long arg)
1849 {
1850 struct cyclades_card *cinfo;
1851 struct cyclades_port *info;
1852 struct tty_struct *tty;
1853 static struct FIRM_ID *firm_id;
1854 static struct ZFW_CTRL *zfw_ctrl;
1855 static struct BOARD_CTRL *board_ctrl;
1856 static struct CH_CTRL *ch_ctrl;
1857 static struct BUF_CTRL *buf_ctrl;
1858 unsigned long expires = jiffies + HZ;
1859 int card, port;
1860
1861 for (card = 0; card < NR_CARDS; card++) {
1862 cinfo = &cy_card[card];
1863
1864 if (!IS_CYC_Z(*cinfo))
1865 continue;
1866 if (!ISZLOADED(*cinfo))
1867 continue;
1868
1869 firm_id = cinfo->base_addr + ID_ADDRESS;
1870 zfw_ctrl = cinfo->base_addr +
1871 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1872 board_ctrl = &(zfw_ctrl->board_ctrl);
1873
1874 /* Skip first polling cycle to avoid racing conditions with the FW */
1875 if (!cinfo->intr_enabled) {
1876 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1877 cinfo->intr_enabled = 1;
1878 continue;
1879 }
1880
1881 cyz_handle_cmd(cinfo);
1882
1883 for (port = 0; port < cinfo->nports; port++) {
1884 info = &cinfo->ports[port];
1885 tty = info->tty;
1886 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1887 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1888
1889 if (!info->throttle)
1890 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1891 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1892 }
1893 /* poll every 'cyz_polling_cycle' period */
1894 expires = jiffies + cyz_polling_cycle;
1895 }
1896 mod_timer(&cyz_timerlist, expires);
1897 } /* cyz_poll */
1898
1899 #endif /* CONFIG_CYZ_INTR */
1900
1901 /********** End of block of Cyclades-Z specific code *********/
1902 /***********************************************************/
1903
1904 /* This is called whenever a port becomes active;
1905 interrupts are enabled and DTR & RTS are turned on.
1906 */
1907 static int startup(struct cyclades_port *info)
1908 {
1909 struct cyclades_card *card;
1910 unsigned long flags;
1911 int retval = 0;
1912 void __iomem *base_addr;
1913 int chip, channel, index;
1914 unsigned long page;
1915
1916 card = info->card;
1917 channel = info->line - card->first_line;
1918
1919 page = get_zeroed_page(GFP_KERNEL);
1920 if (!page)
1921 return -ENOMEM;
1922
1923 spin_lock_irqsave(&card->card_lock, flags);
1924
1925 if (info->flags & ASYNC_INITIALIZED) {
1926 free_page(page);
1927 goto errout;
1928 }
1929
1930 if (!info->type) {
1931 if (info->tty) {
1932 set_bit(TTY_IO_ERROR, &info->tty->flags);
1933 }
1934 free_page(page);
1935 goto errout;
1936 }
1937
1938 if (info->xmit_buf)
1939 free_page(page);
1940 else
1941 info->xmit_buf = (unsigned char *)page;
1942
1943 spin_unlock_irqrestore(&card->card_lock, flags);
1944
1945 set_line_char(info);
1946
1947 if (!IS_CYC_Z(*card)) {
1948 chip = channel >> 2;
1949 channel &= 0x03;
1950 index = card->bus_index;
1951 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1952
1953 #ifdef CY_DEBUG_OPEN
1954 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1955 "base_addr %p\n",
1956 card, chip, channel, base_addr);
1957 #endif
1958 spin_lock_irqsave(&card->card_lock, flags);
1959
1960 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1961
1962 cy_writeb(base_addr + (CyRTPR << index),
1963 (info->default_timeout ? info->default_timeout : 0x02));
1964 /* 10ms rx timeout */
1965
1966 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1967 index);
1968
1969 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1970 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1971 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1972
1973 #ifdef CY_DEBUG_DTR
1974 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1975 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1976 readb(base_addr + (CyMSVR1 << index)),
1977 readb(base_addr + (CyMSVR2 << index)));
1978 #endif
1979
1980 cy_writeb(base_addr + (CySRER << index),
1981 readb(base_addr + (CySRER << index)) | CyRxData);
1982 info->flags |= ASYNC_INITIALIZED;
1983
1984 if (info->tty) {
1985 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1986 }
1987 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1988 info->breakon = info->breakoff = 0;
1989 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1990 info->idle_stats.in_use =
1991 info->idle_stats.recv_idle =
1992 info->idle_stats.xmit_idle = jiffies;
1993
1994 spin_unlock_irqrestore(&card->card_lock, flags);
1995
1996 } else {
1997 struct FIRM_ID __iomem *firm_id;
1998 struct ZFW_CTRL __iomem *zfw_ctrl;
1999 struct BOARD_CTRL __iomem *board_ctrl;
2000 struct CH_CTRL __iomem *ch_ctrl;
2001 int retval;
2002
2003 base_addr = card->base_addr;
2004
2005 firm_id = base_addr + ID_ADDRESS;
2006 if (!ISZLOADED(*card)) {
2007 return -ENODEV;
2008 }
2009
2010 zfw_ctrl = card->base_addr +
2011 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2012 board_ctrl = &zfw_ctrl->board_ctrl;
2013 ch_ctrl = zfw_ctrl->ch_ctrl;
2014
2015 #ifdef CY_DEBUG_OPEN
2016 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2017 "base_addr %p\n", card, channel, base_addr);
2018 #endif
2019 spin_lock_irqsave(&card->card_lock, flags);
2020
2021 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2022 #ifdef Z_WAKE
2023 #ifdef CONFIG_CYZ_INTR
2024 cy_writel(&ch_ctrl[channel].intr_enable,
2025 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2026 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2027 #else
2028 cy_writel(&ch_ctrl[channel].intr_enable,
2029 C_IN_IOCTLW | C_IN_MDCD);
2030 #endif /* CONFIG_CYZ_INTR */
2031 #else
2032 #ifdef CONFIG_CYZ_INTR
2033 cy_writel(&ch_ctrl[channel].intr_enable,
2034 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2035 C_IN_RXNNDT | C_IN_MDCD);
2036 #else
2037 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2038 #endif /* CONFIG_CYZ_INTR */
2039 #endif /* Z_WAKE */
2040
2041 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2042 if (retval != 0) {
2043 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2044 "%x\n", info->line, retval);
2045 }
2046
2047 /* Flush RX buffers before raising DTR and RTS */
2048 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2049 if (retval != 0) {
2050 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2051 "%x\n", info->line, retval);
2052 }
2053
2054 /* set timeout !!! */
2055 /* set RTS and DTR !!! */
2056 cy_writel(&ch_ctrl[channel].rs_control,
2057 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2058 C_RS_DTR);
2059 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2060 if (retval != 0) {
2061 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2062 "%x\n", info->line, retval);
2063 }
2064 #ifdef CY_DEBUG_DTR
2065 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2066 #endif
2067
2068 /* enable send, recv, modem !!! */
2069
2070 info->flags |= ASYNC_INITIALIZED;
2071 if (info->tty) {
2072 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2073 }
2074 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2075 info->breakon = info->breakoff = 0;
2076 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2077 info->idle_stats.in_use =
2078 info->idle_stats.recv_idle =
2079 info->idle_stats.xmit_idle = jiffies;
2080
2081 spin_unlock_irqrestore(&card->card_lock, flags);
2082 }
2083
2084 #ifdef CY_DEBUG_OPEN
2085 printk(KERN_DEBUG "cyc startup done\n");
2086 #endif
2087 return 0;
2088
2089 errout:
2090 spin_unlock_irqrestore(&card->card_lock, flags);
2091 return retval;
2092 } /* startup */
2093
2094 static void start_xmit(struct cyclades_port *info)
2095 {
2096 struct cyclades_card *card;
2097 unsigned long flags;
2098 void __iomem *base_addr;
2099 int chip, channel, index;
2100
2101 card = info->card;
2102 channel = info->line - card->first_line;
2103 if (!IS_CYC_Z(*card)) {
2104 chip = channel >> 2;
2105 channel &= 0x03;
2106 index = card->bus_index;
2107 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2108
2109 spin_lock_irqsave(&card->card_lock, flags);
2110 cy_writeb(base_addr + (CyCAR << index), channel);
2111 cy_writeb(base_addr + (CySRER << index),
2112 readb(base_addr + (CySRER << index)) | CyTxRdy);
2113 spin_unlock_irqrestore(&card->card_lock, flags);
2114 } else {
2115 #ifdef CONFIG_CYZ_INTR
2116 int retval;
2117
2118 spin_lock_irqsave(&card->card_lock, flags);
2119 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2120 if (retval != 0) {
2121 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2122 "%x\n", info->line, retval);
2123 }
2124 spin_unlock_irqrestore(&card->card_lock, flags);
2125 #else /* CONFIG_CYZ_INTR */
2126 /* Don't have to do anything at this time */
2127 #endif /* CONFIG_CYZ_INTR */
2128 }
2129 } /* start_xmit */
2130
2131 /*
2132 * This routine shuts down a serial port; interrupts are disabled,
2133 * and DTR is dropped if the hangup on close termio flag is on.
2134 */
2135 static void shutdown(struct cyclades_port *info)
2136 {
2137 struct cyclades_card *card;
2138 unsigned long flags;
2139 void __iomem *base_addr;
2140 int chip, channel, index;
2141
2142 if (!(info->flags & ASYNC_INITIALIZED)) {
2143 return;
2144 }
2145
2146 card = info->card;
2147 channel = info->line - card->first_line;
2148 if (!IS_CYC_Z(*card)) {
2149 chip = channel >> 2;
2150 channel &= 0x03;
2151 index = card->bus_index;
2152 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2153
2154 #ifdef CY_DEBUG_OPEN
2155 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2156 "channel %d, base_addr %p\n",
2157 card, chip, channel, base_addr);
2158 #endif
2159
2160 spin_lock_irqsave(&card->card_lock, flags);
2161
2162 /* Clear delta_msr_wait queue to avoid mem leaks. */
2163 wake_up_interruptible(&info->delta_msr_wait);
2164
2165 if (info->xmit_buf) {
2166 unsigned char *temp;
2167 temp = info->xmit_buf;
2168 info->xmit_buf = NULL;
2169 free_page((unsigned long)temp);
2170 }
2171 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2172 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2173 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2174 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2175 #ifdef CY_DEBUG_DTR
2176 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2177 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2178 readb(base_addr + (CyMSVR1 << index)),
2179 readb(base_addr + (CyMSVR2 << index)));
2180 #endif
2181 }
2182 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2183 /* it may be appropriate to clear _XMIT at
2184 some later date (after testing)!!! */
2185
2186 if (info->tty) {
2187 set_bit(TTY_IO_ERROR, &info->tty->flags);
2188 }
2189 info->flags &= ~ASYNC_INITIALIZED;
2190 spin_unlock_irqrestore(&card->card_lock, flags);
2191 } else {
2192 struct FIRM_ID __iomem *firm_id;
2193 struct ZFW_CTRL __iomem *zfw_ctrl;
2194 struct BOARD_CTRL __iomem *board_ctrl;
2195 struct CH_CTRL __iomem *ch_ctrl;
2196 int retval;
2197
2198 base_addr = card->base_addr;
2199 #ifdef CY_DEBUG_OPEN
2200 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2201 "base_addr %p\n", card, channel, base_addr);
2202 #endif
2203
2204 firm_id = base_addr + ID_ADDRESS;
2205 if (!ISZLOADED(*card)) {
2206 return;
2207 }
2208
2209 zfw_ctrl = card->base_addr +
2210 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2211 board_ctrl = &zfw_ctrl->board_ctrl;
2212 ch_ctrl = zfw_ctrl->ch_ctrl;
2213
2214 spin_lock_irqsave(&card->card_lock, flags);
2215
2216 if (info->xmit_buf) {
2217 unsigned char *temp;
2218 temp = info->xmit_buf;
2219 info->xmit_buf = NULL;
2220 free_page((unsigned long)temp);
2221 }
2222
2223 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2224 cy_writel(&ch_ctrl[channel].rs_control,
2225 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2226 ~(C_RS_RTS | C_RS_DTR)));
2227 retval = cyz_issue_cmd(info->card, channel,
2228 C_CM_IOCTLM, 0L);
2229 if (retval != 0) {
2230 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2231 "was %x\n", info->line, retval);
2232 }
2233 #ifdef CY_DEBUG_DTR
2234 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2235 #endif
2236 }
2237
2238 if (info->tty) {
2239 set_bit(TTY_IO_ERROR, &info->tty->flags);
2240 }
2241 info->flags &= ~ASYNC_INITIALIZED;
2242
2243 spin_unlock_irqrestore(&card->card_lock, flags);
2244 }
2245
2246 #ifdef CY_DEBUG_OPEN
2247 printk(KERN_DEBUG "cyc shutdown done\n");
2248 #endif
2249 } /* shutdown */
2250
2251 /*
2252 * ------------------------------------------------------------
2253 * cy_open() and friends
2254 * ------------------------------------------------------------
2255 */
2256
2257 static int
2258 block_til_ready(struct tty_struct *tty, struct file *filp,
2259 struct cyclades_port *info)
2260 {
2261 DECLARE_WAITQUEUE(wait, current);
2262 struct cyclades_card *cinfo;
2263 unsigned long flags;
2264 int chip, channel, index;
2265 int retval;
2266 void __iomem *base_addr;
2267
2268 cinfo = info->card;
2269 channel = info->line - cinfo->first_line;
2270
2271 /*
2272 * If the device is in the middle of being closed, then block
2273 * until it's done, and then try again.
2274 */
2275 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2276 wait_event_interruptible(info->close_wait,
2277 !(info->flags & ASYNC_CLOSING));
2278 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2279 }
2280
2281 /*
2282 * If non-blocking mode is set, then make the check up front
2283 * and then exit.
2284 */
2285 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2286 info->flags |= ASYNC_NORMAL_ACTIVE;
2287 return 0;
2288 }
2289
2290 /*
2291 * Block waiting for the carrier detect and the line to become
2292 * free (i.e., not in use by the callout). While we are in
2293 * this loop, info->count is dropped by one, so that
2294 * cy_close() knows when to free things. We restore it upon
2295 * exit, either normal or abnormal.
2296 */
2297 retval = 0;
2298 add_wait_queue(&info->open_wait, &wait);
2299 #ifdef CY_DEBUG_OPEN
2300 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2301 "count = %d\n", info->line, info->count);
2302 #endif
2303 spin_lock_irqsave(&cinfo->card_lock, flags);
2304 if (!tty_hung_up_p(filp))
2305 info->count--;
2306 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2307 #ifdef CY_DEBUG_COUNT
2308 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2309 "%d\n", current->pid, info->count);
2310 #endif
2311 info->blocked_open++;
2312
2313 if (!IS_CYC_Z(*cinfo)) {
2314 chip = channel >> 2;
2315 channel &= 0x03;
2316 index = cinfo->bus_index;
2317 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2318
2319 while (1) {
2320 spin_lock_irqsave(&cinfo->card_lock, flags);
2321 if ((tty->termios->c_cflag & CBAUD)) {
2322 cy_writeb(base_addr + (CyCAR << index),
2323 (u_char) channel);
2324 cy_writeb(base_addr + (CyMSVR1 << index),
2325 CyRTS);
2326 cy_writeb(base_addr + (CyMSVR2 << index),
2327 CyDTR);
2328 #ifdef CY_DEBUG_DTR
2329 printk(KERN_DEBUG "cyc:block_til_ready raising "
2330 "DTR\n");
2331 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2332 readb(base_addr + (CyMSVR1 << index)),
2333 readb(base_addr + (CyMSVR2 << index)));
2334 #endif
2335 }
2336 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2337
2338 set_current_state(TASK_INTERRUPTIBLE);
2339 if (tty_hung_up_p(filp) ||
2340 !(info->flags & ASYNC_INITIALIZED)) {
2341 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2342 -EAGAIN : -ERESTARTSYS);
2343 break;
2344 }
2345
2346 spin_lock_irqsave(&cinfo->card_lock, flags);
2347 cy_writeb(base_addr + (CyCAR << index),
2348 (u_char) channel);
2349 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2350 (readb(base_addr +
2351 (CyMSVR1 << index)) & CyDCD))) {
2352 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2353 break;
2354 }
2355 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2356
2357 if (signal_pending(current)) {
2358 retval = -ERESTARTSYS;
2359 break;
2360 }
2361 #ifdef CY_DEBUG_OPEN
2362 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2363 "ttyC%d, count = %d\n",
2364 info->line, info->count);
2365 #endif
2366 schedule();
2367 }
2368 } else {
2369 struct FIRM_ID __iomem *firm_id;
2370 struct ZFW_CTRL __iomem *zfw_ctrl;
2371 struct BOARD_CTRL __iomem *board_ctrl;
2372 struct CH_CTRL __iomem *ch_ctrl;
2373 int retval;
2374
2375 base_addr = cinfo->base_addr;
2376 firm_id = base_addr + ID_ADDRESS;
2377 if (!ISZLOADED(*cinfo)) {
2378 __set_current_state(TASK_RUNNING);
2379 remove_wait_queue(&info->open_wait, &wait);
2380 return -EINVAL;
2381 }
2382
2383 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2384 board_ctrl = &zfw_ctrl->board_ctrl;
2385 ch_ctrl = zfw_ctrl->ch_ctrl;
2386
2387 while (1) {
2388 if ((tty->termios->c_cflag & CBAUD)) {
2389 cy_writel(&ch_ctrl[channel].rs_control,
2390 readl(&ch_ctrl[channel].rs_control) |
2391 C_RS_RTS | C_RS_DTR);
2392 retval = cyz_issue_cmd(cinfo,
2393 channel, C_CM_IOCTLM, 0L);
2394 if (retval != 0) {
2395 printk(KERN_ERR "cyc:block_til_ready "
2396 "retval on ttyC%d was %x\n",
2397 info->line, retval);
2398 }
2399 #ifdef CY_DEBUG_DTR
2400 printk(KERN_DEBUG "cyc:block_til_ready raising "
2401 "Z DTR\n");
2402 #endif
2403 }
2404
2405 set_current_state(TASK_INTERRUPTIBLE);
2406 if (tty_hung_up_p(filp) ||
2407 !(info->flags & ASYNC_INITIALIZED)) {
2408 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2409 -EAGAIN : -ERESTARTSYS);
2410 break;
2411 }
2412 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2413 (readl(&ch_ctrl[channel].rs_status) &
2414 C_RS_DCD))) {
2415 break;
2416 }
2417 if (signal_pending(current)) {
2418 retval = -ERESTARTSYS;
2419 break;
2420 }
2421 #ifdef CY_DEBUG_OPEN
2422 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2423 "ttyC%d, count = %d\n",
2424 info->line, info->count);
2425 #endif
2426 schedule();
2427 }
2428 }
2429 __set_current_state(TASK_RUNNING);
2430 remove_wait_queue(&info->open_wait, &wait);
2431 if (!tty_hung_up_p(filp)) {
2432 info->count++;
2433 #ifdef CY_DEBUG_COUNT
2434 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2435 "count to %d\n", current->pid, info->count);
2436 #endif
2437 }
2438 info->blocked_open--;
2439 #ifdef CY_DEBUG_OPEN
2440 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2441 "count = %d\n", info->line, info->count);
2442 #endif
2443 if (retval)
2444 return retval;
2445 info->flags |= ASYNC_NORMAL_ACTIVE;
2446 return 0;
2447 } /* block_til_ready */
2448
2449 /*
2450 * This routine is called whenever a serial port is opened. It
2451 * performs the serial-specific initialization for the tty structure.
2452 */
2453 static int cy_open(struct tty_struct *tty, struct file *filp)
2454 {
2455 struct cyclades_port *info;
2456 unsigned int i;
2457 int retval, line;
2458
2459 line = tty->index;
2460 if ((line < 0) || (NR_PORTS <= line)) {
2461 return -ENODEV;
2462 }
2463 for (i = 0; i < NR_CARDS; i++)
2464 if (line < cy_card[i].first_line + cy_card[i].nports &&
2465 line >= cy_card[i].first_line)
2466 break;
2467 if (i >= NR_CARDS)
2468 return -ENODEV;
2469 info = &cy_card[i].ports[line - cy_card[i].first_line];
2470 if (info->line < 0) {
2471 return -ENODEV;
2472 }
2473
2474 /* If the card's firmware hasn't been loaded,
2475 treat it as absent from the system. This
2476 will make the user pay attention.
2477 */
2478 if (IS_CYC_Z(*info->card)) {
2479 struct cyclades_card *cinfo = info->card;
2480 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2481
2482 if (!ISZLOADED(*cinfo)) {
2483 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2484 (cinfo->ctl_addr))->mail_box_0)) &&
2485 Z_FPGA_CHECK(*cinfo)) &&
2486 (ZFIRM_HLT == readl(
2487 &firm_id->signature))) {
2488 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2489 "need an external power supply for "
2490 "this number of ports.\nFirmware "
2491 "halted.\n");
2492 } else {
2493 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2494 "yet loaded\n");
2495 }
2496 return -ENODEV;
2497 }
2498 #ifdef CONFIG_CYZ_INTR
2499 else {
2500 /* In case this Z board is operating in interrupt mode, its
2501 interrupts should be enabled as soon as the first open
2502 happens to one of its ports. */
2503 if (!cinfo->intr_enabled) {
2504 struct ZFW_CTRL __iomem *zfw_ctrl;
2505 struct BOARD_CTRL __iomem *board_ctrl;
2506
2507 zfw_ctrl = cinfo->base_addr +
2508 (readl(&firm_id->zfwctrl_addr) &
2509 0xfffff);
2510
2511 board_ctrl = &zfw_ctrl->board_ctrl;
2512
2513 /* Enable interrupts on the PLX chip */
2514 cy_writew(cinfo->ctl_addr + 0x68,
2515 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2516 /* Enable interrupts on the FW */
2517 retval = cyz_issue_cmd(cinfo, 0,
2518 C_CM_IRQ_ENBL, 0L);
2519 if (retval != 0) {
2520 printk(KERN_ERR "cyc:IRQ enable retval "
2521 "was %x\n", retval);
2522 }
2523 cinfo->nports =
2524 (int)readl(&board_ctrl->n_channel);
2525 cinfo->intr_enabled = 1;
2526 }
2527 }
2528 #endif /* CONFIG_CYZ_INTR */
2529 /* Make sure this Z port really exists in hardware */
2530 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2531 return -ENODEV;
2532 }
2533 #ifdef CY_DEBUG_OTHER
2534 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2535 #endif
2536 tty->driver_data = info;
2537 info->tty = tty;
2538 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2539 return -ENODEV;
2540 }
2541 #ifdef CY_DEBUG_OPEN
2542 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2543 info->count);
2544 #endif
2545 info->count++;
2546 #ifdef CY_DEBUG_COUNT
2547 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2548 current->pid, info->count);
2549 #endif
2550
2551 /*
2552 * If the port is the middle of closing, bail out now
2553 */
2554 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2555 wait_event_interruptible(info->close_wait,
2556 !(info->flags & ASYNC_CLOSING));
2557 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2558 }
2559
2560 /*
2561 * Start up serial port
2562 */
2563 retval = startup(info);
2564 if (retval) {
2565 return retval;
2566 }
2567
2568 retval = block_til_ready(tty, filp, info);
2569 if (retval) {
2570 #ifdef CY_DEBUG_OPEN
2571 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2572 "with %d\n", retval);
2573 #endif
2574 return retval;
2575 }
2576
2577 info->throttle = 0;
2578
2579 #ifdef CY_DEBUG_OPEN
2580 printk(KERN_DEBUG "cyc:cy_open done\n");
2581 #endif
2582 return 0;
2583 } /* cy_open */
2584
2585 /*
2586 * cy_wait_until_sent() --- wait until the transmitter is empty
2587 */
2588 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2589 {
2590 struct cyclades_card *card;
2591 struct cyclades_port *info = tty->driver_data;
2592 void __iomem *base_addr;
2593 int chip, channel, index;
2594 unsigned long orig_jiffies;
2595 int char_time;
2596
2597 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2598 return;
2599
2600 if (info->xmit_fifo_size == 0)
2601 return; /* Just in case.... */
2602
2603 orig_jiffies = jiffies;
2604 /*
2605 * Set the check interval to be 1/5 of the estimated time to
2606 * send a single character, and make it at least 1. The check
2607 * interval should also be less than the timeout.
2608 *
2609 * Note: we have to use pretty tight timings here to satisfy
2610 * the NIST-PCTS.
2611 */
2612 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2613 char_time = char_time / 5;
2614 if (char_time <= 0)
2615 char_time = 1;
2616 if (timeout < 0)
2617 timeout = 0;
2618 if (timeout)
2619 char_time = min(char_time, timeout);
2620 /*
2621 * If the transmitter hasn't cleared in twice the approximate
2622 * amount of time to send the entire FIFO, it probably won't
2623 * ever clear. This assumes the UART isn't doing flow
2624 * control, which is currently the case. Hence, if it ever
2625 * takes longer than info->timeout, this is probably due to a
2626 * UART bug of some kind. So, we clamp the timeout parameter at
2627 * 2*info->timeout.
2628 */
2629 if (!timeout || timeout > 2 * info->timeout)
2630 timeout = 2 * info->timeout;
2631 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2632 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2633 timeout, char_time, jiffies);
2634 #endif
2635 card = info->card;
2636 channel = (info->line) - (card->first_line);
2637 if (!IS_CYC_Z(*card)) {
2638 chip = channel >> 2;
2639 channel &= 0x03;
2640 index = card->bus_index;
2641 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2642 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2643 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2644 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2645 #endif
2646 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2647 break;
2648 if (timeout && time_after(jiffies, orig_jiffies +
2649 timeout))
2650 break;
2651 }
2652 }
2653 /* Run one more char cycle */
2654 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2655 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2656 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2657 #endif
2658 }
2659
2660 /*
2661 * This routine is called when a particular tty device is closed.
2662 */
2663 static void cy_close(struct tty_struct *tty, struct file *filp)
2664 {
2665 struct cyclades_port *info = tty->driver_data;
2666 struct cyclades_card *card;
2667 unsigned long flags;
2668
2669 #ifdef CY_DEBUG_OTHER
2670 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2671 #endif
2672
2673 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2674 return;
2675 }
2676
2677 card = info->card;
2678
2679 spin_lock_irqsave(&card->card_lock, flags);
2680 /* If the TTY is being hung up, nothing to do */
2681 if (tty_hung_up_p(filp)) {
2682 spin_unlock_irqrestore(&card->card_lock, flags);
2683 return;
2684 }
2685 #ifdef CY_DEBUG_OPEN
2686 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2687 info->count);
2688 #endif
2689 if ((tty->count == 1) && (info->count != 1)) {
2690 /*
2691 * Uh, oh. tty->count is 1, which means that the tty
2692 * structure will be freed. Info->count should always
2693 * be one in these conditions. If it's greater than
2694 * one, we've got real problems, since it means the
2695 * serial port won't be shutdown.
2696 */
2697 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2698 "tty->count is 1, info->count is %d\n", info->count);
2699 info->count = 1;
2700 }
2701 #ifdef CY_DEBUG_COUNT
2702 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2703 current->pid, info->count - 1);
2704 #endif
2705 if (--info->count < 0) {
2706 #ifdef CY_DEBUG_COUNT
2707 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2708 #endif
2709 info->count = 0;
2710 }
2711 if (info->count) {
2712 spin_unlock_irqrestore(&card->card_lock, flags);
2713 return;
2714 }
2715 info->flags |= ASYNC_CLOSING;
2716
2717 /*
2718 * Now we wait for the transmit buffer to clear; and we notify
2719 * the line discipline to only process XON/XOFF characters.
2720 */
2721 tty->closing = 1;
2722 spin_unlock_irqrestore(&card->card_lock, flags);
2723 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2724 tty_wait_until_sent(tty, info->closing_wait);
2725 }
2726 spin_lock_irqsave(&card->card_lock, flags);
2727
2728 if (!IS_CYC_Z(*card)) {
2729 int channel = info->line - card->first_line;
2730 int index = card->bus_index;
2731 void __iomem *base_addr = card->base_addr +
2732 (cy_chip_offset[channel >> 2] << index);
2733 /* Stop accepting input */
2734 channel &= 0x03;
2735 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2736 cy_writeb(base_addr + (CySRER << index),
2737 readb(base_addr + (CySRER << index)) & ~CyRxData);
2738 if (info->flags & ASYNC_INITIALIZED) {
2739 /* Waiting for on-board buffers to be empty before closing
2740 the port */
2741 spin_unlock_irqrestore(&card->card_lock, flags);
2742 cy_wait_until_sent(tty, info->timeout);
2743 spin_lock_irqsave(&card->card_lock, flags);
2744 }
2745 } else {
2746 #ifdef Z_WAKE
2747 /* Waiting for on-board buffers to be empty before closing the port */
2748 void __iomem *base_addr = card->base_addr;
2749 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2750 struct ZFW_CTRL __iomem *zfw_ctrl =
2751 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2752 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2753 int channel = info->line - card->first_line;
2754 int retval;
2755
2756 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2757 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2758 if (retval != 0) {
2759 printk(KERN_DEBUG "cyc:cy_close retval on "
2760 "ttyC%d was %x\n", info->line, retval);
2761 }
2762 spin_unlock_irqrestore(&card->card_lock, flags);
2763 wait_for_completion_interruptible(&info->shutdown_wait);
2764 spin_lock_irqsave(&card->card_lock, flags);
2765 }
2766 #endif
2767 }
2768
2769 spin_unlock_irqrestore(&card->card_lock, flags);
2770 shutdown(info);
2771 if (tty->driver->flush_buffer)
2772 tty->driver->flush_buffer(tty);
2773 tty_ldisc_flush(tty);
2774 spin_lock_irqsave(&card->card_lock, flags);
2775
2776 tty->closing = 0;
2777 info->event = 0;
2778 info->tty = NULL;
2779 if (info->blocked_open) {
2780 spin_unlock_irqrestore(&card->card_lock, flags);
2781 if (info->close_delay) {
2782 msleep_interruptible(jiffies_to_msecs
2783 (info->close_delay));
2784 }
2785 wake_up_interruptible(&info->open_wait);
2786 spin_lock_irqsave(&card->card_lock, flags);
2787 }
2788 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2789 wake_up_interruptible(&info->close_wait);
2790
2791 #ifdef CY_DEBUG_OTHER
2792 printk(KERN_DEBUG "cyc:cy_close done\n");
2793 #endif
2794
2795 spin_unlock_irqrestore(&card->card_lock, flags);
2796 } /* cy_close */
2797
2798 /* This routine gets called when tty_write has put something into
2799 * the write_queue. The characters may come from user space or
2800 * kernel space.
2801 *
2802 * This routine will return the number of characters actually
2803 * accepted for writing.
2804 *
2805 * If the port is not already transmitting stuff, start it off by
2806 * enabling interrupts. The interrupt service routine will then
2807 * ensure that the characters are sent.
2808 * If the port is already active, there is no need to kick it.
2809 *
2810 */
2811 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2812 {
2813 struct cyclades_port *info = tty->driver_data;
2814 unsigned long flags;
2815 int c, ret = 0;
2816
2817 #ifdef CY_DEBUG_IO
2818 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2819 #endif
2820
2821 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2822 return 0;
2823 }
2824
2825 if (!info->xmit_buf)
2826 return 0;
2827
2828 spin_lock_irqsave(&info->card->card_lock, flags);
2829 while (1) {
2830 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2831 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2832
2833 if (c <= 0)
2834 break;
2835
2836 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2837 info->xmit_head = (info->xmit_head + c) &
2838 (SERIAL_XMIT_SIZE - 1);
2839 info->xmit_cnt += c;
2840 buf += c;
2841 count -= c;
2842 ret += c;
2843 }
2844 spin_unlock_irqrestore(&info->card->card_lock, flags);
2845
2846 info->idle_stats.xmit_bytes += ret;
2847 info->idle_stats.xmit_idle = jiffies;
2848
2849 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2850 start_xmit(info);
2851 }
2852 return ret;
2853 } /* cy_write */
2854
2855 /*
2856 * This routine is called by the kernel to write a single
2857 * character to the tty device. If the kernel uses this routine,
2858 * it must call the flush_chars() routine (if defined) when it is
2859 * done stuffing characters into the driver. If there is no room
2860 * in the queue, the character is ignored.
2861 */
2862 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2863 {
2864 struct cyclades_port *info = tty->driver_data;
2865 unsigned long flags;
2866
2867 #ifdef CY_DEBUG_IO
2868 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2869 #endif
2870
2871 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2872 return;
2873
2874 if (!info->xmit_buf)
2875 return;
2876
2877 spin_lock_irqsave(&info->card->card_lock, flags);
2878 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2879 spin_unlock_irqrestore(&info->card->card_lock, flags);
2880 return;
2881 }
2882
2883 info->xmit_buf[info->xmit_head++] = ch;
2884 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2885 info->xmit_cnt++;
2886 info->idle_stats.xmit_bytes++;
2887 info->idle_stats.xmit_idle = jiffies;
2888 spin_unlock_irqrestore(&info->card->card_lock, flags);
2889 } /* cy_put_char */
2890
2891 /*
2892 * This routine is called by the kernel after it has written a
2893 * series of characters to the tty device using put_char().
2894 */
2895 static void cy_flush_chars(struct tty_struct *tty)
2896 {
2897 struct cyclades_port *info = tty->driver_data;
2898
2899 #ifdef CY_DEBUG_IO
2900 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2901 #endif
2902
2903 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2904 return;
2905
2906 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2907 !info->xmit_buf)
2908 return;
2909
2910 start_xmit(info);
2911 } /* cy_flush_chars */
2912
2913 /*
2914 * This routine returns the numbers of characters the tty driver
2915 * will accept for queuing to be written. This number is subject
2916 * to change as output buffers get emptied, or if the output flow
2917 * control is activated.
2918 */
2919 static int cy_write_room(struct tty_struct *tty)
2920 {
2921 struct cyclades_port *info = tty->driver_data;
2922 int ret;
2923
2924 #ifdef CY_DEBUG_IO
2925 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2926 #endif
2927
2928 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2929 return 0;
2930 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2931 if (ret < 0)
2932 ret = 0;
2933 return ret;
2934 } /* cy_write_room */
2935
2936 static int cy_chars_in_buffer(struct tty_struct *tty)
2937 {
2938 struct cyclades_card *card;
2939 struct cyclades_port *info = tty->driver_data;
2940 int channel;
2941
2942 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2943 return 0;
2944
2945 card = info->card;
2946 channel = (info->line) - (card->first_line);
2947
2948 #ifdef Z_EXT_CHARS_IN_BUFFER
2949 if (!IS_CYC_Z(cy_card[card])) {
2950 #endif /* Z_EXT_CHARS_IN_BUFFER */
2951 #ifdef CY_DEBUG_IO
2952 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2953 info->line, info->xmit_cnt);
2954 #endif
2955 return info->xmit_cnt;
2956 #ifdef Z_EXT_CHARS_IN_BUFFER
2957 } else {
2958 static struct FIRM_ID *firm_id;
2959 static struct ZFW_CTRL *zfw_ctrl;
2960 static struct CH_CTRL *ch_ctrl;
2961 static struct BUF_CTRL *buf_ctrl;
2962 int char_count;
2963 __u32 tx_put, tx_get, tx_bufsize;
2964
2965 firm_id = card->base_addr + ID_ADDRESS;
2966 zfw_ctrl = card->base_addr +
2967 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2968 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2969 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2970
2971 tx_get = readl(&buf_ctrl->tx_get);
2972 tx_put = readl(&buf_ctrl->tx_put);
2973 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2974 if (tx_put >= tx_get)
2975 char_count = tx_put - tx_get;
2976 else
2977 char_count = tx_put - tx_get + tx_bufsize;
2978 #ifdef CY_DEBUG_IO
2979 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2980 info->line, info->xmit_cnt + char_count);
2981 #endif
2982 return info->xmit_cnt + char_count;
2983 }
2984 #endif /* Z_EXT_CHARS_IN_BUFFER */
2985 } /* cy_chars_in_buffer */
2986
2987 /*
2988 * ------------------------------------------------------------
2989 * cy_ioctl() and friends
2990 * ------------------------------------------------------------
2991 */
2992
2993 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2994 {
2995 int co, co_val, bpr;
2996 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2997 25000000);
2998
2999 if (baud == 0) {
3000 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3001 return;
3002 }
3003
3004 /* determine which prescaler to use */
3005 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3006 if (cy_clock / co_val / baud > 63)
3007 break;
3008 }
3009
3010 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3011 if (bpr > 255)
3012 bpr = 255;
3013
3014 info->tbpr = info->rbpr = bpr;
3015 info->tco = info->rco = co;
3016 }
3017
3018 /*
3019 * This routine finds or computes the various line characteristics.
3020 * It used to be called config_setup
3021 */
3022 static void set_line_char(struct cyclades_port *info)
3023 {
3024 struct cyclades_card *card;
3025 unsigned long flags;
3026 void __iomem *base_addr;
3027 int chip, channel, index;
3028 unsigned cflag, iflag;
3029 unsigned short chip_number;
3030 int baud, baud_rate = 0;
3031 int i;
3032
3033 if (!info->tty || !info->tty->termios) {
3034 return;
3035 }
3036 if (info->line == -1) {
3037 return;
3038 }
3039 cflag = info->tty->termios->c_cflag;
3040 iflag = info->tty->termios->c_iflag;
3041
3042 /*
3043 * Set up the tty->alt_speed kludge
3044 */
3045 if (info->tty) {
3046 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3047 info->tty->alt_speed = 57600;
3048 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3049 info->tty->alt_speed = 115200;
3050 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3051 info->tty->alt_speed = 230400;
3052 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3053 info->tty->alt_speed = 460800;
3054 }
3055
3056 card = info->card;
3057 channel = info->line - card->first_line;
3058 chip_number = channel / 4;
3059
3060 if (!IS_CYC_Z(*card)) {
3061
3062 index = card->bus_index;
3063
3064 /* baud rate */
3065 baud = tty_get_baud_rate(info->tty);
3066 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3067 ASYNC_SPD_CUST) {
3068 if (info->custom_divisor)
3069 baud_rate = info->baud / info->custom_divisor;
3070 else
3071 baud_rate = info->baud;
3072 } else if (baud > CD1400_MAX_SPEED) {
3073 baud = CD1400_MAX_SPEED;
3074 }
3075 /* find the baud index */
3076 for (i = 0; i < 20; i++) {
3077 if (baud == baud_table[i]) {
3078 break;
3079 }
3080 }
3081 if (i == 20) {
3082 i = 19; /* CD1400_MAX_SPEED */
3083 }
3084
3085 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3086 ASYNC_SPD_CUST) {
3087 cyy_baud_calc(info, baud_rate);
3088 } else {
3089 if (info->chip_rev >= CD1400_REV_J) {
3090 /* It is a CD1400 rev. J or later */
3091 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3092 info->tco = baud_co_60[i]; /* Tx CO */
3093 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3094 info->rco = baud_co_60[i]; /* Rx CO */
3095 } else {
3096 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3097 info->tco = baud_co_25[i]; /* Tx CO */
3098 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3099 info->rco = baud_co_25[i]; /* Rx CO */
3100 }
3101 }
3102 if (baud_table[i] == 134) {
3103 /* get it right for 134.5 baud */
3104 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3105 2;
3106 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3107 ASYNC_SPD_CUST) {
3108 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3109 baud_rate) + 2;
3110 } else if (baud_table[i]) {
3111 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3112 baud_table[i]) + 2;
3113 /* this needs to be propagated into the card info */
3114 } else {
3115 info->timeout = 0;
3116 }
3117 /* By tradition (is it a standard?) a baud rate of zero
3118 implies the line should be/has been closed. A bit
3119 later in this routine such a test is performed. */
3120
3121 /* byte size and parity */
3122 info->cor5 = 0;
3123 info->cor4 = 0;
3124 /* receive threshold */
3125 info->cor3 = (info->default_threshold ?
3126 info->default_threshold : baud_cor3[i]);
3127 info->cor2 = CyETC;
3128 switch (cflag & CSIZE) {
3129 case CS5:
3130 info->cor1 = Cy_5_BITS;
3131 break;
3132 case CS6:
3133 info->cor1 = Cy_6_BITS;
3134 break;
3135 case CS7:
3136 info->cor1 = Cy_7_BITS;
3137 break;
3138 case CS8:
3139 info->cor1 = Cy_8_BITS;
3140 break;
3141 }
3142 if (cflag & CSTOPB) {
3143 info->cor1 |= Cy_2_STOP;
3144 }
3145 if (cflag & PARENB) {
3146 if (cflag & PARODD) {
3147 info->cor1 |= CyPARITY_O;
3148 } else {
3149 info->cor1 |= CyPARITY_E;
3150 }
3151 } else {
3152 info->cor1 |= CyPARITY_NONE;
3153 }
3154
3155 /* CTS flow control flag */
3156 if (cflag & CRTSCTS) {
3157 info->flags |= ASYNC_CTS_FLOW;
3158 info->cor2 |= CyCtsAE;
3159 } else {
3160 info->flags &= ~ASYNC_CTS_FLOW;
3161 info->cor2 &= ~CyCtsAE;
3162 }
3163 if (cflag & CLOCAL)
3164 info->flags &= ~ASYNC_CHECK_CD;
3165 else
3166 info->flags |= ASYNC_CHECK_CD;
3167
3168 /***********************************************
3169 The hardware option, CyRtsAO, presents RTS when
3170 the chip has characters to send. Since most modems
3171 use RTS as reverse (inbound) flow control, this
3172 option is not used. If inbound flow control is
3173 necessary, DTR can be programmed to provide the
3174 appropriate signals for use with a non-standard
3175 cable. Contact Marcio Saito for details.
3176 ***********************************************/
3177
3178 chip = channel >> 2;
3179 channel &= 0x03;
3180 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3181
3182 spin_lock_irqsave(&card->card_lock, flags);
3183 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3184
3185 /* tx and rx baud rate */
3186
3187 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3188 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3189 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3190 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3191
3192 /* set line characteristics according configuration */
3193
3194 cy_writeb(base_addr + (CySCHR1 << index),
3195 START_CHAR(info->tty));
3196 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3197 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3198 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3199 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3200 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3201 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3202
3203 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3204 CyCOR3ch, index);
3205
3206 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3207 cy_writeb(base_addr + (CyRTPR << index),
3208 (info->default_timeout ? info->default_timeout : 0x02));
3209 /* 10ms rx timeout */
3210
3211 if (C_CLOCAL(info->tty)) {
3212 /* without modem intr */
3213 cy_writeb(base_addr + (CySRER << index),
3214 readb(base_addr + (CySRER << index)) | CyMdmCh);
3215 /* act on 1->0 modem transitions */
3216 if ((cflag & CRTSCTS) && info->rflow) {
3217 cy_writeb(base_addr + (CyMCOR1 << index),
3218 (CyCTS | rflow_thr[i]));
3219 } else {
3220 cy_writeb(base_addr + (CyMCOR1 << index),
3221 CyCTS);
3222 }
3223 /* act on 0->1 modem transitions */
3224 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3225 } else {
3226 /* without modem intr */
3227 cy_writeb(base_addr + (CySRER << index),
3228 readb(base_addr +
3229 (CySRER << index)) | CyMdmCh);
3230 /* act on 1->0 modem transitions */
3231 if ((cflag & CRTSCTS) && info->rflow) {
3232 cy_writeb(base_addr + (CyMCOR1 << index),
3233 (CyDSR | CyCTS | CyRI | CyDCD |
3234 rflow_thr[i]));
3235 } else {
3236 cy_writeb(base_addr + (CyMCOR1 << index),
3237 CyDSR | CyCTS | CyRI | CyDCD);
3238 }
3239 /* act on 0->1 modem transitions */
3240 cy_writeb(base_addr + (CyMCOR2 << index),
3241 CyDSR | CyCTS | CyRI | CyDCD);
3242 }
3243
3244 if (i == 0) { /* baud rate is zero, turn off line */
3245 if (info->rtsdtr_inv) {
3246 cy_writeb(base_addr + (CyMSVR1 << index),
3247 ~CyRTS);
3248 } else {
3249 cy_writeb(base_addr + (CyMSVR2 << index),
3250 ~CyDTR);
3251 }
3252 #ifdef CY_DEBUG_DTR
3253 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3255 readb(base_addr + (CyMSVR1 << index)),
3256 readb(base_addr + (CyMSVR2 << index)));
3257 #endif
3258 } else {
3259 if (info->rtsdtr_inv) {
3260 cy_writeb(base_addr + (CyMSVR1 << index),
3261 CyRTS);
3262 } else {
3263 cy_writeb(base_addr + (CyMSVR2 << index),
3264 CyDTR);
3265 }
3266 #ifdef CY_DEBUG_DTR
3267 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3268 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3269 readb(base_addr + (CyMSVR1 << index)),
3270 readb(base_addr + (CyMSVR2 << index)));
3271 #endif
3272 }
3273
3274 if (info->tty) {
3275 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3276 }
3277 spin_unlock_irqrestore(&card->card_lock, flags);
3278
3279 } else {
3280 struct FIRM_ID __iomem *firm_id;
3281 struct ZFW_CTRL __iomem *zfw_ctrl;
3282 struct BOARD_CTRL __iomem *board_ctrl;
3283 struct CH_CTRL __iomem *ch_ctrl;
3284 struct BUF_CTRL __iomem *buf_ctrl;
3285 __u32 sw_flow;
3286 int retval;
3287
3288 firm_id = card->base_addr + ID_ADDRESS;
3289 if (!ISZLOADED(*card)) {
3290 return;
3291 }
3292
3293 zfw_ctrl = card->base_addr +
3294 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3295 board_ctrl = &zfw_ctrl->board_ctrl;
3296 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3297 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3298
3299 /* baud rate */
3300 baud = tty_get_baud_rate(info->tty);
3301 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3302 ASYNC_SPD_CUST) {
3303 if (info->custom_divisor)
3304 baud_rate = info->baud / info->custom_divisor;
3305 else
3306 baud_rate = info->baud;
3307 } else if (baud > CYZ_MAX_SPEED) {
3308 baud = CYZ_MAX_SPEED;
3309 }
3310 cy_writel(&ch_ctrl->comm_baud, baud);
3311
3312 if (baud == 134) {
3313 /* get it right for 134.5 baud */
3314 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3315 2;
3316 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3317 ASYNC_SPD_CUST) {
3318 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3319 baud_rate) + 2;
3320 } else if (baud) {
3321 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3322 baud) + 2;
3323 /* this needs to be propagated into the card info */
3324 } else {
3325 info->timeout = 0;
3326 }
3327
3328 /* byte size and parity */
3329 switch (cflag & CSIZE) {
3330 case CS5:
3331 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3332 break;
3333 case CS6:
3334 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3335 break;
3336 case CS7:
3337 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3338 break;
3339 case CS8:
3340 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3341 break;
3342 }
3343 if (cflag & CSTOPB) {
3344 cy_writel(&ch_ctrl->comm_data_l,
3345 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3346 } else {
3347 cy_writel(&ch_ctrl->comm_data_l,
3348 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3349 }
3350 if (cflag & PARENB) {
3351 if (cflag & PARODD) {
3352 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3353 } else {
3354 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3355 }
3356 } else {
3357 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3358 }
3359
3360 /* CTS flow control flag */
3361 if (cflag & CRTSCTS) {
3362 cy_writel(&ch_ctrl->hw_flow,
3363 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3364 } else {
3365 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3366 ~(C_RS_CTS | C_RS_RTS));
3367 }
3368 /* As the HW flow control is done in firmware, the driver
3369 doesn't need to care about it */
3370 info->flags &= ~ASYNC_CTS_FLOW;
3371
3372 /* XON/XOFF/XANY flow control flags */
3373 sw_flow = 0;
3374 if (iflag & IXON) {
3375 sw_flow |= C_FL_OXX;
3376 if (iflag & IXANY)
3377 sw_flow |= C_FL_OIXANY;
3378 }
3379 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3380
3381 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3382 if (retval != 0) {
3383 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3384 "was %x\n", info->line, retval);
3385 }
3386
3387 /* CD sensitivity */
3388 if (cflag & CLOCAL) {
3389 info->flags &= ~ASYNC_CHECK_CD;
3390 } else {
3391 info->flags |= ASYNC_CHECK_CD;
3392 }
3393
3394 if (baud == 0) { /* baud rate is zero, turn off line */
3395 cy_writel(&ch_ctrl->rs_control,
3396 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3397 #ifdef CY_DEBUG_DTR
3398 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3399 #endif
3400 } else {
3401 cy_writel(&ch_ctrl->rs_control,
3402 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3403 #ifdef CY_DEBUG_DTR
3404 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3405 #endif
3406 }
3407
3408 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3409 if (retval != 0) {
3410 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3411 "was %x\n", info->line, retval);
3412 }
3413
3414 if (info->tty) {
3415 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3416 }
3417 }
3418 } /* set_line_char */
3419
3420 static int
3421 get_serial_info(struct cyclades_port *info,
3422 struct serial_struct __user * retinfo)
3423 {
3424 struct serial_struct tmp;
3425 struct cyclades_card *cinfo = info->card;
3426
3427 if (!retinfo)
3428 return -EFAULT;
3429 memset(&tmp, 0, sizeof(tmp));
3430 tmp.type = info->type;
3431 tmp.line = info->line;
3432 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3433 cinfo->first_line;
3434 tmp.irq = cinfo->irq;
3435 tmp.flags = info->flags;
3436 tmp.close_delay = info->close_delay;
3437 tmp.closing_wait = info->closing_wait;
3438 tmp.baud_base = info->baud;
3439 tmp.custom_divisor = info->custom_divisor;
3440 tmp.hub6 = 0; /*!!! */
3441 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3442 } /* get_serial_info */
3443
3444 static int
3445 set_serial_info(struct cyclades_port *info,
3446 struct serial_struct __user * new_info)
3447 {
3448 struct serial_struct new_serial;
3449 struct cyclades_port old_info;
3450
3451 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3452 return -EFAULT;
3453 old_info = *info;
3454
3455 if (!capable(CAP_SYS_ADMIN)) {
3456 if (new_serial.close_delay != info->close_delay ||
3457 new_serial.baud_base != info->baud ||
3458 (new_serial.flags & ASYNC_FLAGS &
3459 ~ASYNC_USR_MASK) !=
3460 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3461 return -EPERM;
3462 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3463 (new_serial.flags & ASYNC_USR_MASK);
3464 info->baud = new_serial.baud_base;
3465 info->custom_divisor = new_serial.custom_divisor;
3466 goto check_and_exit;
3467 }
3468
3469 /*
3470 * OK, past this point, all the error checking has been done.
3471 * At this point, we start making changes.....
3472 */
3473
3474 info->baud = new_serial.baud_base;
3475 info->custom_divisor = new_serial.custom_divisor;
3476 info->flags = (info->flags & ~ASYNC_FLAGS) |
3477 (new_serial.flags & ASYNC_FLAGS);
3478 info->close_delay = new_serial.close_delay * HZ / 100;
3479 info->closing_wait = new_serial.closing_wait * HZ / 100;
3480
3481 check_and_exit:
3482 if (info->flags & ASYNC_INITIALIZED) {
3483 set_line_char(info);
3484 return 0;
3485 } else {
3486 return startup(info);
3487 }
3488 } /* set_serial_info */
3489
3490 /*
3491 * get_lsr_info - get line status register info
3492 *
3493 * Purpose: Let user call ioctl() to get info when the UART physically
3494 * is emptied. On bus types like RS485, the transmitter must
3495 * release the bus after transmitting. This must be done when
3496 * the transmit shift register is empty, not be done when the
3497 * transmit holding register is empty. This functionality
3498 * allows an RS485 driver to be written in user space.
3499 */
3500 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3501 {
3502 struct cyclades_card *card;
3503 int chip, channel, index;
3504 unsigned char status;
3505 unsigned int result;
3506 unsigned long flags;
3507 void __iomem *base_addr;
3508
3509 card = info->card;
3510 channel = (info->line) - (card->first_line);
3511 if (!IS_CYC_Z(*card)) {
3512 chip = channel >> 2;
3513 channel &= 0x03;
3514 index = card->bus_index;
3515 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3516
3517 spin_lock_irqsave(&card->card_lock, flags);
3518 status = readb(base_addr + (CySRER << index)) &
3519 (CyTxRdy | CyTxMpty);
3520 spin_unlock_irqrestore(&card->card_lock, flags);
3521 result = (status ? 0 : TIOCSER_TEMT);
3522 } else {
3523 /* Not supported yet */
3524 return -EINVAL;
3525 }
3526 return put_user(result, (unsigned long __user *)value);
3527 }
3528
3529 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3530 {
3531 struct cyclades_port *info = tty->driver_data;
3532 struct cyclades_card *card;
3533 int chip, channel, index;
3534 void __iomem *base_addr;
3535 unsigned long flags;
3536 unsigned char status;
3537 unsigned long lstatus;
3538 unsigned int result;
3539 struct FIRM_ID __iomem *firm_id;
3540 struct ZFW_CTRL __iomem *zfw_ctrl;
3541 struct BOARD_CTRL __iomem *board_ctrl;
3542 struct CH_CTRL __iomem *ch_ctrl;
3543
3544 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3545 return -ENODEV;
3546
3547 card = info->card;
3548 channel = info->line - card->first_line;
3549 if (!IS_CYC_Z(*card)) {
3550 chip = channel >> 2;
3551 channel &= 0x03;
3552 index = card->bus_index;
3553 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3554
3555 spin_lock_irqsave(&card->card_lock, flags);
3556 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3557 status = readb(base_addr + (CyMSVR1 << index));
3558 status |= readb(base_addr + (CyMSVR2 << index));
3559 spin_unlock_irqrestore(&card->card_lock, flags);
3560
3561 if (info->rtsdtr_inv) {
3562 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3563 ((status & CyDTR) ? TIOCM_RTS : 0);
3564 } else {
3565 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3566 ((status & CyDTR) ? TIOCM_DTR : 0);
3567 }
3568 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3569 ((status & CyRI) ? TIOCM_RNG : 0) |
3570 ((status & CyDSR) ? TIOCM_DSR : 0) |
3571 ((status & CyCTS) ? TIOCM_CTS : 0);
3572 } else {
3573 base_addr = card->base_addr;
3574 firm_id = card->base_addr + ID_ADDRESS;
3575 if (ISZLOADED(*card)) {
3576 zfw_ctrl = card->base_addr +
3577 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3578 board_ctrl = &zfw_ctrl->board_ctrl;
3579 ch_ctrl = zfw_ctrl->ch_ctrl;
3580 lstatus = readl(&ch_ctrl[channel].rs_status);
3581 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3582 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3583 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3584 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3585 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3586 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3587 } else {
3588 result = 0;
3589 return -ENODEV;
3590 }
3591
3592 }
3593 return result;
3594 } /* cy_tiomget */
3595
3596 static int
3597 cy_tiocmset(struct tty_struct *tty, struct file *file,
3598 unsigned int set, unsigned int clear)
3599 {
3600 struct cyclades_port *info = tty->driver_data;
3601 struct cyclades_card *card;
3602 int chip, channel, index;
3603 void __iomem *base_addr;
3604 unsigned long flags;
3605 struct FIRM_ID __iomem *firm_id;
3606 struct ZFW_CTRL __iomem *zfw_ctrl;
3607 struct BOARD_CTRL __iomem *board_ctrl;
3608 struct CH_CTRL __iomem *ch_ctrl;
3609 int retval;
3610
3611 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3612 return -ENODEV;
3613
3614 card = info->card;
3615 channel = (info->line) - (card->first_line);
3616 if (!IS_CYC_Z(*card)) {
3617 chip = channel >> 2;
3618 channel &= 0x03;
3619 index = card->bus_index;
3620 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3621
3622 if (set & TIOCM_RTS) {
3623 spin_lock_irqsave(&card->card_lock, flags);
3624 cy_writeb(base_addr + (CyCAR << index),
3625 (u_char) channel);
3626 if (info->rtsdtr_inv) {
3627 cy_writeb(base_addr + (CyMSVR2 << index),
3628 CyDTR);
3629 } else {
3630 cy_writeb(base_addr + (CyMSVR1 << index),
3631 CyRTS);
3632 }
3633 spin_unlock_irqrestore(&card->card_lock, flags);
3634 }
3635 if (clear & TIOCM_RTS) {
3636 spin_lock_irqsave(&card->card_lock, flags);
3637 cy_writeb(base_addr + (CyCAR << index),
3638 (u_char) channel);
3639 if (info->rtsdtr_inv) {
3640 cy_writeb(base_addr + (CyMSVR2 << index),
3641 ~CyDTR);
3642 } else {
3643 cy_writeb(base_addr + (CyMSVR1 << index),
3644 ~CyRTS);
3645 }
3646 spin_unlock_irqrestore(&card->card_lock, flags);
3647 }
3648 if (set & TIOCM_DTR) {
3649 spin_lock_irqsave(&card->card_lock, flags);
3650 cy_writeb(base_addr + (CyCAR << index),
3651 (u_char) channel);
3652 if (info->rtsdtr_inv) {
3653 cy_writeb(base_addr + (CyMSVR1 << index),
3654 CyRTS);
3655 } else {
3656 cy_writeb(base_addr + (CyMSVR2 << index),
3657 CyDTR);
3658 }
3659 #ifdef CY_DEBUG_DTR
3660 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3661 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3662 readb(base_addr + (CyMSVR1 << index)),
3663 readb(base_addr + (CyMSVR2 << index)));
3664 #endif
3665 spin_unlock_irqrestore(&card->card_lock, flags);
3666 }
3667 if (clear & TIOCM_DTR) {
3668 spin_lock_irqsave(&card->card_lock, flags);
3669 cy_writeb(base_addr + (CyCAR << index),
3670 (u_char) channel);
3671 if (info->rtsdtr_inv) {
3672 cy_writeb(base_addr + (CyMSVR1 << index),
3673 ~CyRTS);
3674 } else {
3675 cy_writeb(base_addr + (CyMSVR2 << index),
3676 ~CyDTR);
3677 }
3678
3679 #ifdef CY_DEBUG_DTR
3680 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3681 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3682 readb(base_addr + (CyMSVR1 << index)),
3683 readb(base_addr + (CyMSVR2 << index)));
3684 #endif
3685 spin_unlock_irqrestore(&card->card_lock, flags);
3686 }
3687 } else {
3688 base_addr = card->base_addr;
3689
3690 firm_id = card->base_addr + ID_ADDRESS;
3691 if (ISZLOADED(*card)) {
3692 zfw_ctrl = card->base_addr +
3693 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3694 board_ctrl = &zfw_ctrl->board_ctrl;
3695 ch_ctrl = zfw_ctrl->ch_ctrl;
3696
3697 if (set & TIOCM_RTS) {
3698 spin_lock_irqsave(&card->card_lock, flags);
3699 cy_writel(&ch_ctrl[channel].rs_control,
3700 readl(&ch_ctrl[channel].rs_control) |
3701 C_RS_RTS);
3702 spin_unlock_irqrestore(&card->card_lock, flags);
3703 }
3704 if (clear & TIOCM_RTS) {
3705 spin_lock_irqsave(&card->card_lock, flags);
3706 cy_writel(&ch_ctrl[channel].rs_control,
3707 readl(&ch_ctrl[channel].rs_control) &
3708 ~C_RS_RTS);
3709 spin_unlock_irqrestore(&card->card_lock, flags);
3710 }
3711 if (set & TIOCM_DTR) {
3712 spin_lock_irqsave(&card->card_lock, flags);
3713 cy_writel(&ch_ctrl[channel].rs_control,
3714 readl(&ch_ctrl[channel].rs_control) |
3715 C_RS_DTR);
3716 #ifdef CY_DEBUG_DTR
3717 printk(KERN_DEBUG "cyc:set_modem_info raising "
3718 "Z DTR\n");
3719 #endif
3720 spin_unlock_irqrestore(&card->card_lock, flags);
3721 }
3722 if (clear & TIOCM_DTR) {
3723 spin_lock_irqsave(&card->card_lock, flags);
3724 cy_writel(&ch_ctrl[channel].rs_control,
3725 readl(&ch_ctrl[channel].rs_control) &
3726 ~C_RS_DTR);
3727 #ifdef CY_DEBUG_DTR
3728 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3729 "Z DTR\n");
3730 #endif
3731 spin_unlock_irqrestore(&card->card_lock, flags);
3732 }
3733 } else {
3734 return -ENODEV;
3735 }
3736 spin_lock_irqsave(&card->card_lock, flags);
3737 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3738 if (retval != 0) {
3739 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3740 "was %x\n", info->line, retval);
3741 }
3742 spin_unlock_irqrestore(&card->card_lock, flags);
3743 }
3744 return 0;
3745 } /* cy_tiocmset */
3746
3747 /*
3748 * cy_break() --- routine which turns the break handling on or off
3749 */
3750 static void cy_break(struct tty_struct *tty, int break_state)
3751 {
3752 struct cyclades_port *info = tty->driver_data;
3753 struct cyclades_card *card;
3754 unsigned long flags;
3755
3756 if (serial_paranoia_check(info, tty->name, "cy_break"))
3757 return;
3758
3759 card = info->card;
3760
3761 spin_lock_irqsave(&card->card_lock, flags);
3762 if (!IS_CYC_Z(*card)) {
3763 /* Let the transmit ISR take care of this (since it
3764 requires stuffing characters into the output stream).
3765 */
3766 if (break_state == -1) {
3767 if (!info->breakon) {
3768 info->breakon = 1;
3769 if (!info->xmit_cnt) {
3770 spin_unlock_irqrestore(&card->card_lock, flags);
3771 start_xmit(info);
3772 spin_lock_irqsave(&card->card_lock, flags);
3773 }
3774 }
3775 } else {
3776 if (!info->breakoff) {
3777 info->breakoff = 1;
3778 if (!info->xmit_cnt) {
3779 spin_unlock_irqrestore(&card->card_lock, flags);
3780 start_xmit(info);
3781 spin_lock_irqsave(&card->card_lock, flags);
3782 }
3783 }
3784 }
3785 } else {
3786 int retval;
3787
3788 if (break_state == -1) {
3789 retval = cyz_issue_cmd(card,
3790 info->line - card->first_line,
3791 C_CM_SET_BREAK, 0L);
3792 if (retval != 0) {
3793 printk(KERN_ERR "cyc:cy_break (set) retval on "
3794 "ttyC%d was %x\n", info->line, retval);
3795 }
3796 } else {
3797 retval = cyz_issue_cmd(card,
3798 info->line - card->first_line,
3799 C_CM_CLR_BREAK, 0L);
3800 if (retval != 0) {
3801 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3802 "on ttyC%d was %x\n", info->line,
3803 retval);
3804 }
3805 }
3806 }
3807 spin_unlock_irqrestore(&card->card_lock, flags);
3808 } /* cy_break */
3809
3810 static int
3811 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3812 {
3813
3814 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3815 return -EFAULT;
3816 info->mon.int_count = 0;
3817 info->mon.char_count = 0;
3818 info->mon.char_max = 0;
3819 info->mon.char_last = 0;
3820 return 0;
3821 } /* get_mon_info */
3822
3823 static int set_threshold(struct cyclades_port *info, unsigned long value)
3824 {
3825 struct cyclades_card *card;
3826 void __iomem *base_addr;
3827 int channel, chip, index;
3828 unsigned long flags;
3829
3830 card = info->card;
3831 channel = info->line - card->first_line;
3832 if (!IS_CYC_Z(*card)) {
3833 chip = channel >> 2;
3834 channel &= 0x03;
3835 index = card->bus_index;
3836 base_addr =
3837 card->base_addr + (cy_chip_offset[chip] << index);
3838
3839 info->cor3 &= ~CyREC_FIFO;
3840 info->cor3 |= value & CyREC_FIFO;
3841
3842 spin_lock_irqsave(&card->card_lock, flags);
3843 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3844 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3845 spin_unlock_irqrestore(&card->card_lock, flags);
3846 }
3847 return 0;
3848 } /* set_threshold */
3849
3850 static int
3851 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3852 {
3853 struct cyclades_card *card;
3854 void __iomem *base_addr;
3855 int channel, chip, index;
3856 unsigned long tmp;
3857
3858 card = info->card;
3859 channel = info->line - card->first_line;
3860 if (!IS_CYC_Z(*card)) {
3861 chip = channel >> 2;
3862 channel &= 0x03;
3863 index = card->bus_index;
3864 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3865
3866 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3867 return put_user(tmp, value);
3868 }
3869 return 0;
3870 } /* get_threshold */
3871
3872 static int
3873 set_default_threshold(struct cyclades_port *info, unsigned long value)
3874 {
3875 info->default_threshold = value & 0x0f;
3876 return 0;
3877 } /* set_default_threshold */
3878
3879 static int
3880 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3881 {
3882 return put_user(info->default_threshold, value);
3883 } /* get_default_threshold */
3884
3885 static int set_timeout(struct cyclades_port *info, unsigned long value)
3886 {
3887 struct cyclades_card *card;
3888 void __iomem *base_addr;
3889 int channel, chip, index;
3890 unsigned long flags;
3891
3892 card = info->card;
3893 channel = info->line - card->first_line;
3894 if (!IS_CYC_Z(*card)) {
3895 chip = channel >> 2;
3896 channel &= 0x03;
3897 index = card->bus_index;
3898 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3899
3900 spin_lock_irqsave(&card->card_lock, flags);
3901 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3902 spin_unlock_irqrestore(&card->card_lock, flags);
3903 }
3904 return 0;
3905 } /* set_timeout */
3906
3907 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3908 {
3909 struct cyclades_card *card;
3910 void __iomem *base_addr;
3911 int channel, chip, index;
3912 unsigned long tmp;
3913
3914 card = info->card;
3915 channel = info->line - card->first_line;
3916 if (!IS_CYC_Z(*card)) {
3917 chip = channel >> 2;
3918 channel &= 0x03;
3919 index = card->bus_index;
3920 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3921
3922 tmp = readb(base_addr + (CyRTPR << index));
3923 return put_user(tmp, value);
3924 }
3925 return 0;
3926 } /* get_timeout */
3927
3928 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3929 {
3930 info->default_timeout = value & 0xff;
3931 return 0;
3932 } /* set_default_timeout */
3933
3934 static int
3935 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3936 {
3937 return put_user(info->default_timeout, value);
3938 } /* get_default_timeout */
3939
3940 /*
3941 * This routine allows the tty driver to implement device-
3942 * specific ioctl's. If the ioctl number passed in cmd is
3943 * not recognized by the driver, it should return ENOIOCTLCMD.
3944 */
3945 static int
3946 cy_ioctl(struct tty_struct *tty, struct file *file,
3947 unsigned int cmd, unsigned long arg)
3948 {
3949 struct cyclades_port *info = tty->driver_data;
3950 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3951 struct serial_icounter_struct __user *p_cuser; /* user space */
3952 int ret_val = 0;
3953 unsigned long flags;
3954 void __user *argp = (void __user *)arg;
3955
3956 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3957 return -ENODEV;
3958
3959 #ifdef CY_DEBUG_OTHER
3960 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3961 info->line, cmd, arg);
3962 #endif
3963
3964 switch (cmd) {
3965 case CYGETMON:
3966 ret_val = get_mon_info(info, argp);
3967 break;
3968 case CYGETTHRESH:
3969 ret_val = get_threshold(info, argp);
3970 break;
3971 case CYSETTHRESH:
3972 ret_val = set_threshold(info, arg);
3973 break;
3974 case CYGETDEFTHRESH:
3975 ret_val = get_default_threshold(info, argp);
3976 break;
3977 case CYSETDEFTHRESH:
3978 ret_val = set_default_threshold(info, arg);
3979 break;
3980 case CYGETTIMEOUT:
3981 ret_val = get_timeout(info, argp);
3982 break;
3983 case CYSETTIMEOUT:
3984 ret_val = set_timeout(info, arg);
3985 break;
3986 case CYGETDEFTIMEOUT:
3987 ret_val = get_default_timeout(info, argp);
3988 break;
3989 case CYSETDEFTIMEOUT:
3990 ret_val = set_default_timeout(info, arg);
3991 break;
3992 case CYSETRFLOW:
3993 info->rflow = (int)arg;
3994 ret_val = 0;
3995 break;
3996 case CYGETRFLOW:
3997 ret_val = info->rflow;
3998 break;
3999 case CYSETRTSDTR_INV:
4000 info->rtsdtr_inv = (int)arg;
4001 ret_val = 0;
4002 break;
4003 case CYGETRTSDTR_INV:
4004 ret_val = info->rtsdtr_inv;
4005 break;
4006 case CYGETCD1400VER:
4007 ret_val = info->chip_rev;
4008 break;
4009 #ifndef CONFIG_CYZ_INTR
4010 case CYZSETPOLLCYCLE:
4011 cyz_polling_cycle = (arg * HZ) / 1000;
4012 ret_val = 0;
4013 break;
4014 case CYZGETPOLLCYCLE:
4015 ret_val = (cyz_polling_cycle * 1000) / HZ;
4016 break;
4017 #endif /* CONFIG_CYZ_INTR */
4018 case CYSETWAIT:
4019 info->closing_wait = (unsigned short)arg *HZ / 100;
4020 ret_val = 0;
4021 break;
4022 case CYGETWAIT:
4023 ret_val = info->closing_wait / (HZ / 100);
4024 break;
4025 case TIOCGSERIAL:
4026 ret_val = get_serial_info(info, argp);
4027 break;
4028 case TIOCSSERIAL:
4029 ret_val = set_serial_info(info, argp);
4030 break;
4031 case TIOCSERGETLSR: /* Get line status register */
4032 ret_val = get_lsr_info(info, argp);
4033 break;
4034 /*
4035 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4036 * - mask passed in arg for lines of interest
4037 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4038 * Caller should use TIOCGICOUNT to see which one it was
4039 */
4040 case TIOCMIWAIT:
4041 spin_lock_irqsave(&info->card->card_lock, flags);
4042 /* note the counters on entry */
4043 cnow = info->icount;
4044 spin_unlock_irqrestore(&info->card->card_lock, flags);
4045 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4046 cprev = cnow;
4047 spin_lock_irqsave(&info->card->card_lock, flags);
4048 cnow = info->icount; /* atomic copy */
4049 spin_unlock_irqrestore(&info->card->card_lock, flags);
4050
4051 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4052 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4053 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4054 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4055 }));
4056 break;
4057
4058 /*
4059 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4060 * Return: write counters to the user passed counter struct
4061 * NB: both 1->0 and 0->1 transitions are counted except for
4062 * RI where only 0->1 is counted.
4063 */
4064 case TIOCGICOUNT:
4065 spin_lock_irqsave(&info->card->card_lock, flags);
4066 cnow = info->icount;
4067 spin_unlock_irqrestore(&info->card->card_lock, flags);
4068 p_cuser = argp;
4069 ret_val = put_user(cnow.cts, &p_cuser->cts);
4070 if (ret_val)
4071 return ret_val;
4072 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4073 if (ret_val)
4074 return ret_val;
4075 ret_val = put_user(cnow.rng, &p_cuser->rng);
4076 if (ret_val)
4077 return ret_val;
4078 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4079 if (ret_val)
4080 return ret_val;
4081 ret_val = put_user(cnow.rx, &p_cuser->rx);
4082 if (ret_val)
4083 return ret_val;
4084 ret_val = put_user(cnow.tx, &p_cuser->tx);
4085 if (ret_val)
4086 return ret_val;
4087 ret_val = put_user(cnow.frame, &p_cuser->frame);
4088 if (ret_val)
4089 return ret_val;
4090 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4091 if (ret_val)
4092 return ret_val;
4093 ret_val = put_user(cnow.parity, &p_cuser->parity);
4094 if (ret_val)
4095 return ret_val;
4096 ret_val = put_user(cnow.brk, &p_cuser->brk);
4097 if (ret_val)
4098 return ret_val;
4099 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4100 if (ret_val)
4101 return ret_val;
4102 ret_val = 0;
4103 break;
4104 default:
4105 ret_val = -ENOIOCTLCMD;
4106 }
4107
4108 #ifdef CY_DEBUG_OTHER
4109 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4110 #endif
4111
4112 return ret_val;
4113 } /* cy_ioctl */
4114
4115 /*
4116 * This routine allows the tty driver to be notified when
4117 * device's termios settings have changed. Note that a
4118 * well-designed tty driver should be prepared to accept the case
4119 * where old == NULL, and try to do something rational.
4120 */
4121 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4122 {
4123 struct cyclades_port *info = tty->driver_data;
4124
4125 #ifdef CY_DEBUG_OTHER
4126 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4127 #endif
4128
4129 if (tty->termios->c_cflag == old_termios->c_cflag &&
4130 (tty->termios->c_iflag & (IXON | IXANY)) ==
4131 (old_termios->c_iflag & (IXON | IXANY)))
4132 return;
4133 set_line_char(info);
4134
4135 if ((old_termios->c_cflag & CRTSCTS) &&
4136 !(tty->termios->c_cflag & CRTSCTS)) {
4137 tty->hw_stopped = 0;
4138 cy_start(tty);
4139 }
4140 #if 0
4141 /*
4142 * No need to wake up processes in open wait, since they
4143 * sample the CLOCAL flag once, and don't recheck it.
4144 * XXX It's not clear whether the current behavior is correct
4145 * or not. Hence, this may change.....
4146 */
4147 if (!(old_termios->c_cflag & CLOCAL) &&
4148 (tty->termios->c_cflag & CLOCAL))
4149 wake_up_interruptible(&info->open_wait);
4150 #endif
4151 } /* cy_set_termios */
4152
4153 /* This function is used to send a high-priority XON/XOFF character to
4154 the device.
4155 */
4156 static void cy_send_xchar(struct tty_struct *tty, char ch)
4157 {
4158 struct cyclades_port *info = tty->driver_data;
4159 struct cyclades_card *card;
4160 int channel;
4161
4162 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4163 return;
4164
4165 info->x_char = ch;
4166
4167 if (ch)
4168 cy_start(tty);
4169
4170 card = info->card;
4171 channel = info->line - card->first_line;
4172
4173 if (IS_CYC_Z(*card)) {
4174 if (ch == STOP_CHAR(tty))
4175 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4176 else if (ch == START_CHAR(tty))
4177 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4178 }
4179 }
4180
4181 /* This routine is called by the upper-layer tty layer to signal
4182 that incoming characters should be throttled because the input
4183 buffers are close to full.
4184 */
4185 static void cy_throttle(struct tty_struct *tty)
4186 {
4187 struct cyclades_port *info = tty->driver_data;
4188 struct cyclades_card *card;
4189 unsigned long flags;
4190 void __iomem *base_addr;
4191 int chip, channel, index;
4192
4193 #ifdef CY_DEBUG_THROTTLE
4194 char buf[64];
4195
4196 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4197 tty->ldisc.chars_in_buffer(tty), info->line);
4198 #endif
4199
4200 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4201 return;
4202 }
4203
4204 card = info->card;
4205
4206 if (I_IXOFF(tty)) {
4207 if (!IS_CYC_Z(*card))
4208 cy_send_xchar(tty, STOP_CHAR(tty));
4209 else
4210 info->throttle = 1;
4211 }
4212
4213 if (tty->termios->c_cflag & CRTSCTS) {
4214 channel = info->line - card->first_line;
4215 if (!IS_CYC_Z(*card)) {
4216 chip = channel >> 2;
4217 channel &= 0x03;
4218 index = card->bus_index;
4219 base_addr = card->base_addr +
4220 (cy_chip_offset[chip] << index);
4221
4222 spin_lock_irqsave(&card->card_lock, flags);
4223 cy_writeb(base_addr + (CyCAR << index),
4224 (u_char) channel);
4225 if (info->rtsdtr_inv) {
4226 cy_writeb(base_addr + (CyMSVR2 << index),
4227 ~CyDTR);
4228 } else {
4229 cy_writeb(base_addr + (CyMSVR1 << index),
4230 ~CyRTS);
4231 }
4232 spin_unlock_irqrestore(&card->card_lock, flags);
4233 } else {
4234 info->throttle = 1;
4235 }
4236 }
4237 } /* cy_throttle */
4238
4239 /*
4240 * This routine notifies the tty driver that it should signal
4241 * that characters can now be sent to the tty without fear of
4242 * overrunning the input buffers of the line disciplines.
4243 */
4244 static void cy_unthrottle(struct tty_struct *tty)
4245 {
4246 struct cyclades_port *info = tty->driver_data;
4247 struct cyclades_card *card;
4248 unsigned long flags;
4249 void __iomem *base_addr;
4250 int chip, channel, index;
4251
4252 #ifdef CY_DEBUG_THROTTLE
4253 char buf[64];
4254
4255 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4256 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4257 #endif
4258
4259 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4260 return;
4261 }
4262
4263 if (I_IXOFF(tty)) {
4264 if (info->x_char)
4265 info->x_char = 0;
4266 else
4267 cy_send_xchar(tty, START_CHAR(tty));
4268 }
4269
4270 if (tty->termios->c_cflag & CRTSCTS) {
4271 card = info->card;
4272 channel = info->line - card->first_line;
4273 if (!IS_CYC_Z(*card)) {
4274 chip = channel >> 2;
4275 channel &= 0x03;
4276 index = card->bus_index;
4277 base_addr = card->base_addr +
4278 (cy_chip_offset[chip] << index);
4279
4280 spin_lock_irqsave(&card->card_lock, flags);
4281 cy_writeb(base_addr + (CyCAR << index),
4282 (u_char) channel);
4283 if (info->rtsdtr_inv) {
4284 cy_writeb(base_addr + (CyMSVR2 << index),
4285 CyDTR);
4286 } else {
4287 cy_writeb(base_addr + (CyMSVR1 << index),
4288 CyRTS);
4289 }
4290 spin_unlock_irqrestore(&card->card_lock, flags);
4291 } else {
4292 info->throttle = 0;
4293 }
4294 }
4295 } /* cy_unthrottle */
4296
4297 /* cy_start and cy_stop provide software output flow control as a
4298 function of XON/XOFF, software CTS, and other such stuff.
4299 */
4300 static void cy_stop(struct tty_struct *tty)
4301 {
4302 struct cyclades_card *cinfo;
4303 struct cyclades_port *info = tty->driver_data;
4304 void __iomem *base_addr;
4305 int chip, channel, index;
4306 unsigned long flags;
4307
4308 #ifdef CY_DEBUG_OTHER
4309 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4310 #endif
4311
4312 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4313 return;
4314
4315 cinfo = info->card;
4316 channel = info->line - cinfo->first_line;
4317 if (!IS_CYC_Z(*cinfo)) {
4318 index = cinfo->bus_index;
4319 chip = channel >> 2;
4320 channel &= 0x03;
4321 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4322
4323 spin_lock_irqsave(&cinfo->card_lock, flags);
4324 cy_writeb(base_addr + (CyCAR << index),
4325 (u_char)(channel & 0x0003)); /* index channel */
4326 cy_writeb(base_addr + (CySRER << index),
4327 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4328 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4329 }
4330 } /* cy_stop */
4331
4332 static void cy_start(struct tty_struct *tty)
4333 {
4334 struct cyclades_card *cinfo;
4335 struct cyclades_port *info = tty->driver_data;
4336 void __iomem *base_addr;
4337 int chip, channel, index;
4338 unsigned long flags;
4339
4340 #ifdef CY_DEBUG_OTHER
4341 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4342 #endif
4343
4344 if (serial_paranoia_check(info, tty->name, "cy_start"))
4345 return;
4346
4347 cinfo = info->card;
4348 channel = info->line - cinfo->first_line;
4349 index = cinfo->bus_index;
4350 if (!IS_CYC_Z(*cinfo)) {
4351 chip = channel >> 2;
4352 channel &= 0x03;
4353 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4354
4355 spin_lock_irqsave(&cinfo->card_lock, flags);
4356 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4357 cy_writeb(base_addr + (CySRER << index),
4358 readb(base_addr + (CySRER << index)) | CyTxRdy);
4359 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4360 }
4361 } /* cy_start */
4362
4363 static void cy_flush_buffer(struct tty_struct *tty)
4364 {
4365 struct cyclades_port *info = tty->driver_data;
4366 struct cyclades_card *card;
4367 int channel, retval;
4368 unsigned long flags;
4369
4370 #ifdef CY_DEBUG_IO
4371 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4372 #endif
4373
4374 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4375 return;
4376
4377 card = info->card;
4378 channel = info->line - card->first_line;
4379
4380 spin_lock_irqsave(&card->card_lock, flags);
4381 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4382 spin_unlock_irqrestore(&card->card_lock, flags);
4383
4384 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4385 buffers as well */
4386 spin_lock_irqsave(&card->card_lock, flags);
4387 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4388 if (retval != 0) {
4389 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4390 "was %x\n", info->line, retval);
4391 }
4392 spin_unlock_irqrestore(&card->card_lock, flags);
4393 }
4394 tty_wakeup(tty);
4395 } /* cy_flush_buffer */
4396
4397 /*
4398 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4399 */
4400 static void cy_hangup(struct tty_struct *tty)
4401 {
4402 struct cyclades_port *info = tty->driver_data;
4403
4404 #ifdef CY_DEBUG_OTHER
4405 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4406 #endif
4407
4408 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4409 return;
4410
4411 cy_flush_buffer(tty);
4412 shutdown(info);
4413 info->event = 0;
4414 info->count = 0;
4415 #ifdef CY_DEBUG_COUNT
4416 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4417 current->pid);
4418 #endif
4419 info->tty = NULL;
4420 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4421 wake_up_interruptible(&info->open_wait);
4422 } /* cy_hangup */
4423
4424 /*
4425 * ---------------------------------------------------------------------
4426 * cy_init() and friends
4427 *
4428 * cy_init() is called at boot-time to initialize the serial driver.
4429 * ---------------------------------------------------------------------
4430 */
4431
4432 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4433 {
4434 struct cyclades_port *info;
4435 u32 mailbox;
4436 unsigned int nports;
4437 unsigned short chip_number;
4438 int index, port;
4439
4440 spin_lock_init(&cinfo->card_lock);
4441
4442 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4443 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4444 cinfo->ctl_addr)->mail_box_0);
4445 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4446 cinfo->intr_enabled = 0;
4447 cinfo->nports = 0; /* Will be correctly set later, after
4448 Z FW is loaded */
4449 } else {
4450 index = cinfo->bus_index;
4451 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4452 }
4453
4454 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4455 if (cinfo->ports == NULL) {
4456 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4457 cinfo->nports = 0;
4458 return -ENOMEM;
4459 }
4460
4461 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4462 port++) {
4463 info = &cinfo->ports[port - cinfo->first_line];
4464 info->magic = CYCLADES_MAGIC;
4465 info->card = cinfo;
4466 info->line = port;
4467 info->flags = STD_COM_FLAGS;
4468 info->closing_wait = CLOSING_WAIT_DELAY;
4469 info->close_delay = 5 * HZ / 10;
4470
4471 INIT_WORK(&info->tqueue, do_softint);
4472 init_waitqueue_head(&info->open_wait);
4473 init_waitqueue_head(&info->close_wait);
4474 init_completion(&info->shutdown_wait);
4475 init_waitqueue_head(&info->delta_msr_wait);
4476
4477 if (IS_CYC_Z(*cinfo)) {
4478 info->type = PORT_STARTECH;
4479 if (mailbox == ZO_V1)
4480 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4481 else
4482 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4483 #ifdef CONFIG_CYZ_INTR
4484 setup_timer(&cyz_rx_full_timer[port],
4485 cyz_rx_restart, (unsigned long)info);
4486 #endif
4487 } else {
4488 info->type = PORT_CIRRUS;
4489 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4490 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4491 info->cor2 = CyETC;
4492 info->cor3 = 0x08; /* _very_ small rcv threshold */
4493
4494 chip_number = (port - cinfo->first_line) / 4;
4495 if ((info->chip_rev = readb(cinfo->base_addr +
4496 (cy_chip_offset[chip_number] <<
4497 index) + (CyGFRCR << index))) >=
4498 CD1400_REV_J) {
4499 /* It is a CD1400 rev. J or later */
4500 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4501 info->tco = baud_co_60[13]; /* Tx CO */
4502 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4503 info->rco = baud_co_60[13]; /* Rx CO */
4504 info->rtsdtr_inv = 1;
4505 } else {
4506 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4507 info->tco = baud_co_25[13]; /* Tx CO */
4508 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4509 info->rco = baud_co_25[13]; /* Rx CO */
4510 info->rtsdtr_inv = 0;
4511 }
4512 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4513 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4514 }
4515
4516 }
4517
4518 #ifndef CONFIG_CYZ_INTR
4519 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4520 mod_timer(&cyz_timerlist, jiffies + 1);
4521 #ifdef CY_PCI_DEBUG
4522 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4523 #endif
4524 }
4525 #endif
4526 return 0;
4527 }
4528
4529 /* initialize chips on Cyclom-Y card -- return number of valid
4530 chips (which is number of ports/4) */
4531 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4532 int index)
4533 {
4534 unsigned int chip_number;
4535 void __iomem *base_addr;
4536
4537 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4538 /* Cy_HwReset is 0x1400 */
4539 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4540 /* Cy_ClrIntr is 0x1800 */
4541 udelay(500L);
4542
4543 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4544 base_addr =
4545 true_base_addr + (cy_chip_offset[chip_number] << index);
4546 mdelay(1);
4547 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4548 /*************
4549 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4550 chip_number, (unsigned long)base_addr);
4551 *************/
4552 return chip_number;
4553 }
4554
4555 cy_writeb(base_addr + (CyGFRCR << index), 0);
4556 udelay(10L);
4557
4558 /* The Cyclom-16Y does not decode address bit 9 and therefore
4559 cannot distinguish between references to chip 0 and a non-
4560 existent chip 4. If the preceding clearing of the supposed
4561 chip 4 GFRCR register appears at chip 0, there is no chip 4
4562 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4563 */
4564 if (chip_number == 4 && readb(true_base_addr +
4565 (cy_chip_offset[0] << index) +
4566 (CyGFRCR << index)) == 0) {
4567 return chip_number;
4568 }
4569
4570 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4571 mdelay(1);
4572
4573 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4574 /*
4575 printk(" chip #%d at %#6lx is not responding ",
4576 chip_number, (unsigned long)base_addr);
4577 printk("(GFRCR stayed 0)\n",
4578 */
4579 return chip_number;
4580 }
4581 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4582 0x40) {
4583 /*
4584 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4585 "%#2x)\n",
4586 chip_number, (unsigned long)base_addr,
4587 base_addr[CyGFRCR<<index]);
4588 */
4589 return chip_number;
4590 }
4591 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4592 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4593 /* It is a CD1400 rev. J or later */
4594 /* Impossible to reach 5ms with this chip.
4595 Changed to 2ms instead (f = 500 Hz). */
4596 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4597 } else {
4598 /* f = 200 Hz */
4599 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4600 }
4601
4602 /*
4603 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4604 chip_number, (unsigned long)base_addr,
4605 readb(base_addr+(CyGFRCR<<index)));
4606 */
4607 }
4608 return chip_number;
4609 } /* cyy_init_card */
4610
4611 /*
4612 * ---------------------------------------------------------------------
4613 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4614 * sets global variables and return the number of ISA boards found.
4615 * ---------------------------------------------------------------------
4616 */
4617 static int __init cy_detect_isa(void)
4618 {
4619 #ifdef CONFIG_ISA
4620 unsigned short cy_isa_irq, nboard;
4621 void __iomem *cy_isa_address;
4622 unsigned short i, j, cy_isa_nchan;
4623 #ifdef MODULE
4624 int isparam = 0;
4625 #endif
4626
4627 nboard = 0;
4628
4629 #ifdef MODULE
4630 /* Check for module parameters */
4631 for (i = 0; i < NR_CARDS; i++) {
4632 if (maddr[i] || i) {
4633 isparam = 1;
4634 cy_isa_addresses[i] = maddr[i];
4635 }
4636 if (!maddr[i])
4637 break;
4638 }
4639 #endif
4640
4641 /* scan the address table probing for Cyclom-Y/ISA boards */
4642 for (i = 0; i < NR_ISA_ADDRS; i++) {
4643 unsigned int isa_address = cy_isa_addresses[i];
4644 if (isa_address == 0x0000) {
4645 return nboard;
4646 }
4647
4648 /* probe for CD1400... */
4649 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4650 if (cy_isa_address == NULL) {
4651 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4652 "address\n");
4653 continue;
4654 }
4655 cy_isa_nchan = CyPORTS_PER_CHIP *
4656 cyy_init_card(cy_isa_address, 0);
4657 if (cy_isa_nchan == 0) {
4658 iounmap(cy_isa_address);
4659 continue;
4660 }
4661 #ifdef MODULE
4662 if (isparam && irq[i])
4663 cy_isa_irq = irq[i];
4664 else
4665 #endif
4666 /* find out the board's irq by probing */
4667 cy_isa_irq = detect_isa_irq(cy_isa_address);
4668 if (cy_isa_irq == 0) {
4669 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4670 "IRQ could not be detected.\n",
4671 (unsigned long)cy_isa_address);
4672 iounmap(cy_isa_address);
4673 continue;
4674 }
4675
4676 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4677 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4678 "more channels are available. Change NR_PORTS "
4679 "in cyclades.c and recompile kernel.\n",
4680 (unsigned long)cy_isa_address);
4681 iounmap(cy_isa_address);
4682 return nboard;
4683 }
4684 /* fill the next cy_card structure available */
4685 for (j = 0; j < NR_CARDS; j++) {
4686 if (cy_card[j].base_addr == NULL)
4687 break;
4688 }
4689 if (j == NR_CARDS) { /* no more cy_cards available */
4690 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4691 "more cards can be used. Change NR_CARDS in "
4692 "cyclades.c and recompile kernel.\n",
4693 (unsigned long)cy_isa_address);
4694 iounmap(cy_isa_address);
4695 return nboard;
4696 }
4697
4698 /* allocate IRQ */
4699 if (request_irq(cy_isa_irq, cyy_interrupt,
4700 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4701 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4702 "could not allocate IRQ#%d.\n",
4703 (unsigned long)cy_isa_address, cy_isa_irq);
4704 iounmap(cy_isa_address);
4705 return nboard;
4706 }
4707
4708 /* set cy_card */
4709 cy_card[j].base_addr = cy_isa_address;
4710 cy_card[j].ctl_addr = NULL;
4711 cy_card[j].irq = (int)cy_isa_irq;
4712 cy_card[j].bus_index = 0;
4713 cy_card[j].first_line = cy_next_channel;
4714 cy_card[j].num_chips = cy_isa_nchan / 4;
4715 if (cy_init_card(&cy_card[j])) {
4716 cy_card[j].base_addr = NULL;
4717 free_irq(cy_isa_irq, &cy_card[j]);
4718 iounmap(cy_isa_address);
4719 continue;
4720 }
4721 nboard++;
4722
4723 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4724 "%d channels starting from port %d\n",
4725 j + 1, (unsigned long)cy_isa_address,
4726 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4727 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4728
4729 for (j = cy_next_channel;
4730 j < cy_next_channel + cy_isa_nchan; j++)
4731 tty_register_device(cy_serial_driver, j, NULL);
4732 cy_next_channel += cy_isa_nchan;
4733 }
4734 return nboard;
4735 #else
4736 return 0;
4737 #endif /* CONFIG_ISA */
4738 } /* cy_detect_isa */
4739
4740 #ifdef CONFIG_PCI
4741 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4742 {
4743 /* Reset PLX */
4744 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4745 udelay(100L);
4746 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4747
4748 /* Reload Config. Registers from EEPROM */
4749 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4750 udelay(100L);
4751 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4752 }
4753
4754 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4755 const struct pci_device_id *ent)
4756 {
4757 void __iomem *addr0 = NULL, *addr2 = NULL;
4758 char *card_name = NULL;
4759 u32 mailbox;
4760 unsigned int device_id, nchan = 0, card_no, i;
4761 unsigned char plx_ver;
4762 int retval, irq;
4763
4764 retval = pci_enable_device(pdev);
4765 if (retval) {
4766 dev_err(&pdev->dev, "cannot enable device\n");
4767 goto err;
4768 }
4769
4770 /* read PCI configuration area */
4771 irq = pdev->irq;
4772 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4773
4774 #if defined(__alpha__)
4775 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4776 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4777 "addresses on Alpha systems.\n");
4778 retval = -EIO;
4779 goto err_dis;
4780 }
4781 #endif
4782 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4783 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4784 "addresses\n");
4785 retval = -EIO;
4786 goto err_dis;
4787 }
4788
4789 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4790 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4791 "it...\n");
4792 pdev->resource[2].flags &= ~IORESOURCE_IO;
4793 }
4794
4795 retval = pci_request_regions(pdev, "cyclades");
4796 if (retval) {
4797 dev_err(&pdev->dev, "failed to reserve resources\n");
4798 goto err_dis;
4799 }
4800
4801 retval = -EIO;
4802 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4803 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4804 card_name = "Cyclom-Y";
4805
4806 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4807 if (addr0 == NULL) {
4808 dev_err(&pdev->dev, "can't remap ctl region\n");
4809 goto err_reg;
4810 }
4811 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4812 if (addr2 == NULL) {
4813 dev_err(&pdev->dev, "can't remap base region\n");
4814 goto err_unmap;
4815 }
4816
4817 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4818 if (nchan == 0) {
4819 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4820 "Serial-Modules\n");
4821 return -EIO;
4822 }
4823 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4824 struct RUNTIME_9060 __iomem *ctl_addr;
4825
4826 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4827 if (addr0 == NULL) {
4828 dev_err(&pdev->dev, "can't remap ctl region\n");
4829 goto err_reg;
4830 }
4831
4832 /* Disable interrupts on the PLX before resetting it */
4833 cy_writew(addr0 + 0x68,
4834 readw(addr0 + 0x68) & ~0x0900);
4835
4836 plx_init(addr0, 0x6c);
4837 /* For some yet unknown reason, once the PLX9060 reloads
4838 the EEPROM, the IRQ is lost and, thus, we have to
4839 re-write it to the PCI config. registers.
4840 This will remain here until we find a permanent
4841 fix. */
4842 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4843
4844 mailbox = (u32)readl(&ctl_addr->mail_box_0);
4845
4846 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
4847 CyPCI_Ze_win : CyPCI_Zwin);
4848 if (addr2 == NULL) {
4849 dev_err(&pdev->dev, "can't remap base region\n");
4850 goto err_unmap;
4851 }
4852
4853 if (mailbox == ZE_V1) {
4854 card_name = "Cyclades-Ze";
4855
4856 readl(&ctl_addr->mail_box_0);
4857 nchan = ZE_V1_NPORTS;
4858 } else {
4859 card_name = "Cyclades-8Zo";
4860
4861 #ifdef CY_PCI_DEBUG
4862 if (mailbox == ZO_V1) {
4863 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4864 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
4865 "id %lx, ver %lx\n", (ulong)(0xff &
4866 readl(&((struct CUSTOM_REG *)addr2)->
4867 fpga_id)), (ulong)(0xff &
4868 readl(&((struct CUSTOM_REG *)addr2)->
4869 fpga_version)));
4870 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4871 } else {
4872 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
4873 "Cyclades-Z board. FPGA not loaded\n");
4874 }
4875 #endif
4876 /* The following clears the firmware id word. This
4877 ensures that the driver will not attempt to talk to
4878 the board until it has been properly initialized.
4879 */
4880 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4881 cy_writel(addr2 + ID_ADDRESS, 0L);
4882
4883 /* This must be a Cyclades-8Zo/PCI. The extendable
4884 version will have a different device_id and will
4885 be allocated its maximum number of ports. */
4886 nchan = 8;
4887 }
4888 }
4889
4890 if ((cy_next_channel + nchan) > NR_PORTS) {
4891 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
4892 "channels are available. Change NR_PORTS in "
4893 "cyclades.c and recompile kernel.\n");
4894 goto err_unmap;
4895 }
4896 /* fill the next cy_card structure available */
4897 for (card_no = 0; card_no < NR_CARDS; card_no++) {
4898 if (cy_card[card_no].base_addr == NULL)
4899 break;
4900 }
4901 if (card_no == NR_CARDS) { /* no more cy_cards available */
4902 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
4903 "more cards can be used. Change NR_CARDS in "
4904 "cyclades.c and recompile kernel.\n");
4905 goto err_unmap;
4906 }
4907
4908 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4909 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4910 /* allocate IRQ */
4911 retval = request_irq(irq, cyy_interrupt,
4912 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
4913 if (retval) {
4914 dev_err(&pdev->dev, "could not allocate IRQ\n");
4915 goto err_unmap;
4916 }
4917 cy_card[card_no].num_chips = nchan / 4;
4918 } else {
4919 #ifdef CONFIG_CYZ_INTR
4920 /* allocate IRQ only if board has an IRQ */
4921 if (irq != 0 && irq != 255) {
4922 retval = request_irq(irq, cyz_interrupt,
4923 IRQF_SHARED, "Cyclades-Z",
4924 &cy_card[card_no]);
4925 if (retval) {
4926 dev_err(&pdev->dev, "could not allocate IRQ\n");
4927 goto err_unmap;
4928 }
4929 }
4930 #endif /* CONFIG_CYZ_INTR */
4931 cy_card[card_no].num_chips = -1;
4932 }
4933
4934 /* set cy_card */
4935 cy_card[card_no].base_addr = addr2;
4936 cy_card[card_no].ctl_addr = addr0;
4937 cy_card[card_no].irq = irq;
4938 cy_card[card_no].bus_index = 1;
4939 cy_card[card_no].first_line = cy_next_channel;
4940 retval = cy_init_card(&cy_card[card_no]);
4941 if (retval)
4942 goto err_null;
4943
4944 pci_set_drvdata(pdev, &cy_card[card_no]);
4945
4946 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4947 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4948 /* enable interrupts in the PCI interface */
4949 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
4950 switch (plx_ver) {
4951 case PLX_9050:
4952
4953 cy_writeb(addr0 + 0x4c, 0x43);
4954 break;
4955
4956 case PLX_9060:
4957 case PLX_9080:
4958 default: /* Old boards, use PLX_9060 */
4959
4960 plx_init(addr0, 0x6c);
4961 /* For some yet unknown reason, once the PLX9060 reloads
4962 the EEPROM, the IRQ is lost and, thus, we have to
4963 re-write it to the PCI config. registers.
4964 This will remain here until we find a permanent
4965 fix. */
4966 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4967
4968 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
4969 break;
4970 }
4971 }
4972
4973 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
4974 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
4975 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
4976 tty_register_device(cy_serial_driver, i, &pdev->dev);
4977 cy_next_channel += nchan;
4978
4979 return 0;
4980 err_null:
4981 cy_card[card_no].base_addr = NULL;
4982 free_irq(irq, &cy_card[card_no]);
4983 err_unmap:
4984 pci_iounmap(pdev, addr0);
4985 if (addr2)
4986 pci_iounmap(pdev, addr2);
4987 err_reg:
4988 pci_release_regions(pdev);
4989 err_dis:
4990 pci_disable_device(pdev);
4991 err:
4992 return retval;
4993 }
4994
4995 static void __devexit cy_pci_remove(struct pci_dev *pdev)
4996 {
4997 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
4998 unsigned int i;
4999
5000 /* non-Z with old PLX */
5001 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5002 PLX_9050)
5003 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5004 else
5005 #ifndef CONFIG_CYZ_INTR
5006 if (!IS_CYC_Z(*cinfo))
5007 #endif
5008 cy_writew(cinfo->ctl_addr + 0x68,
5009 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5010
5011 pci_iounmap(pdev, cinfo->base_addr);
5012 if (cinfo->ctl_addr)
5013 pci_iounmap(pdev, cinfo->ctl_addr);
5014 if (cinfo->irq
5015 #ifndef CONFIG_CYZ_INTR
5016 && !IS_CYC_Z(*cinfo)
5017 #endif /* CONFIG_CYZ_INTR */
5018 )
5019 free_irq(cinfo->irq, cinfo);
5020 pci_release_regions(pdev);
5021
5022 cinfo->base_addr = NULL;
5023 for (i = cinfo->first_line; i < cinfo->first_line +
5024 cinfo->nports; i++)
5025 tty_unregister_device(cy_serial_driver, i);
5026 cinfo->nports = 0;
5027 kfree(cinfo->ports);
5028 }
5029
5030 static struct pci_driver cy_pci_driver = {
5031 .name = "cyclades",
5032 .id_table = cy_pci_dev_id,
5033 .probe = cy_pci_probe,
5034 .remove = __devexit_p(cy_pci_remove)
5035 };
5036 #endif
5037
5038 static int
5039 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5040 int *eof, void *data)
5041 {
5042 struct cyclades_port *info;
5043 unsigned int i, j;
5044 int len = 0;
5045 off_t begin = 0;
5046 off_t pos = 0;
5047 int size;
5048 __u32 cur_jifs = jiffies;
5049
5050 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5051 "IdleIn Overruns Ldisc\n");
5052
5053 pos += size;
5054 len += size;
5055
5056 /* Output one line for each known port */
5057 for (i = 0; i < NR_CARDS; i++)
5058 for (j = 0; j < cy_card[i].nports; j++) {
5059 info = &cy_card[i].ports[j];
5060
5061 if (info->count)
5062 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5063 "%10lu %8lu %9lu %6ld\n", info->line,
5064 (cur_jifs - info->idle_stats.in_use) /
5065 HZ, info->idle_stats.xmit_bytes,
5066 (cur_jifs - info->idle_stats.xmit_idle)/
5067 HZ, info->idle_stats.recv_bytes,
5068 (cur_jifs - info->idle_stats.recv_idle)/
5069 HZ, info->idle_stats.overruns,
5070 (long)info->tty->ldisc.num);
5071 else
5072 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5073 "%10lu %8lu %9lu %6ld\n",
5074 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5075 len += size;
5076 pos = begin + len;
5077
5078 if (pos < offset) {
5079 len = 0;
5080 begin = pos;
5081 }
5082 if (pos > offset + length)
5083 goto done;
5084 }
5085 *eof = 1;
5086 done:
5087 *start = buf + (offset - begin); /* Start of wanted data */
5088 len -= (offset - begin); /* Start slop */
5089 if (len > length)
5090 len = length; /* Ending slop */
5091 if (len < 0)
5092 len = 0;
5093 return len;
5094 }
5095
5096 /* The serial driver boot-time initialization code!
5097 Hardware I/O ports are mapped to character special devices on a
5098 first found, first allocated manner. That is, this code searches
5099 for Cyclom cards in the system. As each is found, it is probed
5100 to discover how many chips (and thus how many ports) are present.
5101 These ports are mapped to the tty ports 32 and upward in monotonic
5102 fashion. If an 8-port card is replaced with a 16-port card, the
5103 port mapping on a following card will shift.
5104
5105 This approach is different from what is used in the other serial
5106 device driver because the Cyclom is more properly a multiplexer,
5107 not just an aggregation of serial ports on one card.
5108
5109 If there are more cards with more ports than have been
5110 statically allocated above, a warning is printed and the
5111 extra ports are ignored.
5112 */
5113
5114 static const struct tty_operations cy_ops = {
5115 .open = cy_open,
5116 .close = cy_close,
5117 .write = cy_write,
5118 .put_char = cy_put_char,
5119 .flush_chars = cy_flush_chars,
5120 .write_room = cy_write_room,
5121 .chars_in_buffer = cy_chars_in_buffer,
5122 .flush_buffer = cy_flush_buffer,
5123 .ioctl = cy_ioctl,
5124 .throttle = cy_throttle,
5125 .unthrottle = cy_unthrottle,
5126 .set_termios = cy_set_termios,
5127 .stop = cy_stop,
5128 .start = cy_start,
5129 .hangup = cy_hangup,
5130 .break_ctl = cy_break,
5131 .wait_until_sent = cy_wait_until_sent,
5132 .read_proc = cyclades_get_proc_info,
5133 .tiocmget = cy_tiocmget,
5134 .tiocmset = cy_tiocmset,
5135 };
5136
5137 static int __init cy_init(void)
5138 {
5139 unsigned int nboards;
5140 int retval = -ENOMEM;
5141
5142 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5143 if (!cy_serial_driver)
5144 goto err;
5145
5146 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5147 __DATE__, __TIME__);
5148
5149 /* Initialize the tty_driver structure */
5150
5151 cy_serial_driver->owner = THIS_MODULE;
5152 cy_serial_driver->driver_name = "cyclades";
5153 cy_serial_driver->name = "ttyC";
5154 cy_serial_driver->major = CYCLADES_MAJOR;
5155 cy_serial_driver->minor_start = 0;
5156 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5157 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5158 cy_serial_driver->init_termios = tty_std_termios;
5159 cy_serial_driver->init_termios.c_cflag =
5160 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5161 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5162 tty_set_operations(cy_serial_driver, &cy_ops);
5163
5164 retval = tty_register_driver(cy_serial_driver);
5165 if (retval) {
5166 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5167 goto err_frtty;
5168 }
5169
5170 /* the code below is responsible to find the boards. Each different
5171 type of board has its own detection routine. If a board is found,
5172 the next cy_card structure available is set by the detection
5173 routine. These functions are responsible for checking the
5174 availability of cy_card and cy_port data structures and updating
5175 the cy_next_channel. */
5176
5177 /* look for isa boards */
5178 nboards = cy_detect_isa();
5179
5180 #ifdef CONFIG_PCI
5181 /* look for pci boards */
5182 retval = pci_register_driver(&cy_pci_driver);
5183 if (retval && !nboards)
5184 goto err_unr;
5185 #endif
5186
5187 return 0;
5188 err_unr:
5189 tty_unregister_driver(cy_serial_driver);
5190 err_frtty:
5191 put_tty_driver(cy_serial_driver);
5192 err:
5193 return retval;
5194 } /* cy_init */
5195
5196 static void __exit cy_cleanup_module(void)
5197 {
5198 struct cyclades_card *card;
5199 int i, e1;
5200
5201 #ifndef CONFIG_CYZ_INTR
5202 del_timer_sync(&cyz_timerlist);
5203 #endif /* CONFIG_CYZ_INTR */
5204
5205 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5206 printk(KERN_ERR "failed to unregister Cyclades serial "
5207 "driver(%d)\n", e1);
5208
5209 #ifdef CONFIG_PCI
5210 pci_unregister_driver(&cy_pci_driver);
5211 #endif
5212
5213 for (i = 0; i < NR_CARDS; i++) {
5214 card = &cy_card[i];
5215 if (card->base_addr) {
5216 /* clear interrupt */
5217 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5218 iounmap(card->base_addr);
5219 if (card->ctl_addr)
5220 iounmap(card->ctl_addr);
5221 if (card->irq
5222 #ifndef CONFIG_CYZ_INTR
5223 && !IS_CYC_Z(*card)
5224 #endif /* CONFIG_CYZ_INTR */
5225 )
5226 free_irq(card->irq, card);
5227 for (e1 = card->first_line;
5228 e1 < card->first_line +
5229 card->nports; e1++)
5230 tty_unregister_device(cy_serial_driver, e1);
5231 kfree(card->ports);
5232 }
5233 }
5234
5235 put_tty_driver(cy_serial_driver);
5236 } /* cy_cleanup_module */
5237
5238 module_init(cy_init);
5239 module_exit(cy_cleanup_module);
5240
5241 MODULE_LICENSE("GPL");
5242 MODULE_VERSION(CY_VERSION);
Linux kernel - Deliverables
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