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Char: cyclades, remove locking macros
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1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 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 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 282 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
096dcfce
JS		 594#define CY_VERSION "2.4"
595
1da177e4
LT		 596/* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
02f1175c 600#define NR_CARDS 4
1da177e4
LT		 601
602/*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
02f1175c 607#define NR_PORTS 256
1da177e4
LT		 608
609#define ZE_V1_NPORTS 64
610#define ZO_V1 0
611#define ZO_V2 1
612#define ZE_V1 2
613
614#define SERIAL_PARANOIA_CHECK
615#undef CY_DEBUG_OPEN
616#undef CY_DEBUG_THROTTLE
617#undef CY_DEBUG_OTHER
618#undef CY_DEBUG_IO
619#undef CY_DEBUG_COUNT
620#undef CY_DEBUG_DTR
621#undef CY_DEBUG_WAIT_UNTIL_SENT
622#undef CY_DEBUG_INTERRUPTS
623#undef CY_16Y_HACK
624#undef CY_ENABLE_MONITORING
625#undef CY_PCI_DEBUG
626
1da177e4
LT		 627/*
628 * Include section
629 */
1da177e4
LT		 630#include <linux/module.h>
631#include <linux/errno.h>
632#include <linux/signal.h>
633#include <linux/sched.h>
634#include <linux/timer.h>
635#include <linux/interrupt.h>
636#include <linux/tty.h>
33f0f88f 637#include <linux/tty_flip.h>
1da177e4
LT		 638#include <linux/serial.h>
639#include <linux/major.h>
640#include <linux/string.h>
641#include <linux/fcntl.h>
642#include <linux/ptrace.h>
643#include <linux/cyclades.h>
644#include <linux/mm.h>
645#include <linux/ioport.h>
646#include <linux/init.h>
647#include <linux/delay.h>
648#include <linux/spinlock.h>
649#include <linux/bitops.h>
650
651#include <asm/system.h>
652#include <asm/io.h>
653#include <asm/irq.h>
654#include <asm/uaccess.h>
655
1da177e4
LT		 656#include <linux/kernel.h>
657#include <linux/pci.h>
658
659#include <linux/stat.h>
660#include <linux/proc_fs.h>
661
02f1175c
JS		 662static void cy_throttle(struct tty_struct *tty);
663static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 664
665#define IS_CYC_Z(card) ((card).num_chips == -1)
666
667#define Z_FPGA_CHECK(card) \
db05c3b1 668 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 669 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 670
db05c3b1 671#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 672 ((card).ctl_addr))->mail_box_0)) || \
673 Z_FPGA_CHECK(card)) && \
db05c3b1 674 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 675 ((card).base_addr+ID_ADDRESS))->signature)))
676
677#ifndef SERIAL_XMIT_SIZE
678#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
679#endif
680#define WAKEUP_CHARS 256
681
682#define STD_COM_FLAGS (0)
683
1da177e4
LT		 684static struct tty_driver *cy_serial_driver;
685
686#ifdef CONFIG_ISA
687/* This is the address lookup table. The driver will probe for
688 Cyclom-Y/ISA boards at all addresses in here. If you want the
689 driver to probe addresses at a different address, add it to
690 this table. If the driver is probing some other board and
691 causing problems, remove the offending address from this table.
692 The cy_setup function extracts additional addresses from the
693 boot options line. The form is "cyclades=address,address..."
694*/
695
696static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 697 0xD0000,
698 0xD2000,
699 0xD4000,
700 0xD6000,
701 0xD8000,
702 0xDA000,
703 0xDC000,
704 0xDE000,
705 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 706};
02f1175c 707
fe971071 708#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 709
710#ifdef MODULE
3046d50e
JS		 711static long maddr[NR_CARDS];
712static int irq[NR_CARDS];
1da177e4
LT		 713
714module_param_array(maddr, long, NULL, 0);
715module_param_array(irq, int, NULL, 0);
716#endif
717
02f1175c 718#endif /* CONFIG_ISA */
1da177e4
LT		 719
720/* This is the per-card data structure containing address, irq, number of
721 channels, etc. This driver supports a maximum of NR_CARDS cards.
722*/
723static struct cyclades_card cy_card[NR_CARDS];
724
725/* This is the per-channel data structure containing pointers, flags
726 and variables for the port. This driver supports a maximum of NR_PORTS.
727*/
728static struct cyclades_port cy_port[NR_PORTS];
729
02f1175c 730static int cy_next_channel; /* next minor available */
1da177e4 731
1da177e4
LT		 732/*
733 * This is used to look up the divisor speeds and the timeouts
734 * We're normally limited to 15 distinct baud rates. The extra
735 * are accessed via settings in info->flags.
736 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
737 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
738 * HI VHI
739 * 20
740 */
741static int baud_table[] = {
02f1175c
JS		 742 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
743 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
744 230400, 0
745};
746
747static char baud_co_25[] = { /* 25 MHz clock option table */
748 /* value => 00 01 02 03 04 */
749 /* divide by 8 32 128 512 2048 */
750 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
751 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
752};
753
754static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
755 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
756 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
757};
758
759static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
760 /* value => 00 01 02 03 04 */
761 /* divide by 8 32 128 512 2048 */
762 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
763 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
764 0x00
765};
766
767static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
768 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
769 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
770 0x21
771};
772
773static char baud_cor3[] = { /* receive threshold */
774 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
775 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
776 0x07
777};
1da177e4
LT		 778
779/*
780 * The Cyclades driver implements HW flow control as any serial driver.
781 * The cyclades_port structure member rflow and the vector rflow_thr
782 * allows us to take advantage of a special feature in the CD1400 to avoid
783 * data loss even when the system interrupt latency is too high. These flags
784 * are to be used only with very special applications. Setting these flags
785 * requires the use of a special cable (DTR and RTS reversed). In the new
786 * CD1400-based boards (rev. 6.00 or later), there is no need for special
787 * cables.
788 */
789
02f1175c
JS		 790static char rflow_thr[] = { /* rflow threshold */
791 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
792 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a
794};
1da177e4
LT		 795
796/* The Cyclom-Ye has placed the sequential chips in non-sequential
797 * address order. This look-up table overcomes that problem.
798 */
02f1175c
JS		 799static int cy_chip_offset[] = { 0x0000,
800 0x0400,
801 0x0800,
802 0x0C00,
803 0x0200,
804 0x0600,
805 0x0A00,
806 0x0E00
807};
1da177e4
LT		 808
809/* PCI related definitions */
810
1da177e4 811#ifdef CONFIG_PCI
893de2df
JS		 812static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
813 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
814 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
815 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
816 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
817 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
818 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
819 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
820 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
821 { } /* end of table */
02f1175c 822};
893de2df 823MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 824#endif
825
826static void cy_start(struct tty_struct *);
827static void set_line_char(struct cyclades_port *);
1a86b5e3 828static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 829#ifdef CONFIG_ISA
830static unsigned detect_isa_irq(void __iomem *);
02f1175c 831#endif /* CONFIG_ISA */
1da177e4 832
02f1175c 833static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 834
835#ifndef CONFIG_CYZ_INTR
836static void cyz_poll(unsigned long);
837
838/* The Cyclades-Z polling cycle is defined by this variable */
839static long cyz_polling_cycle = CZ_DEF_POLL;
840
8d06afab 841static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 842
02f1175c 843#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 844static void cyz_rx_restart(unsigned long);
845static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 846#endif /* CONFIG_CYZ_INTR */
1da177e4 847
02f1175c
JS		 848static inline int serial_paranoia_check(struct cyclades_port *info,
849 char *name, const char *routine)
1da177e4
LT		 850{
851#ifdef SERIAL_PARANOIA_CHECK
02f1175c 852 if (!info) {
21719191
JS		 853 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
854 "in %s\n", name, routine);
02f1175c
JS		 855 return 1;
856 }
857
858 if ((long)info < (long)(&cy_port[0]) ||
859 (long)(&cy_port[NR_PORTS]) < (long)info) {
21719191
JS		 860 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
861 "for (%s) in %s\n", name, routine);
02f1175c
JS		 862 return 1;
863 }
864
865 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 866 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
867 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 868 return 1;
869 }
1da177e4 870#endif
02f1175c
JS		 871 return 0;
872} /* serial_paranoia_check */
1da177e4
LT		 873
874/*
875 * This routine is used by the interrupt handler to schedule
876 * processing in the software interrupt portion of the driver
877 * (also known as the "bottom half"). This can be called any
878 * number of times for any channel without harm.
879 */
02f1175c 880static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 881{
02f1175c
JS		 882 info->event |= 1 << event; /* remember what kind of event and who */
883 schedule_work(&info->tqueue);
884} /* cy_sched_event */
1da177e4
LT		 885
886/*
887 * This routine is used to handle the "bottom half" processing for the
888 * serial driver, known also the "software interrupt" processing.
889 * This processing is done at the kernel interrupt level, after the
890 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
891 * is where time-consuming activities which can not be done in the
892 * interrupt driver proper are done; the interrupt driver schedules
893 * them using cy_sched_event(), and they get done here.
894 *
895 * This is done through one level of indirection--the task queue.
896 * When a hardware interrupt service routine wants service by the
897 * driver's bottom half, it enqueues the appropriate tq_struct (one
898 * per port) to the keventd work queue and sets a request flag
899 * that the work queue be processed.
900 *
901 * Although this may seem unwieldy, it gives the system a way to
902 * pass an argument (in this case the pointer to the cyclades_port
903 * structure) to the bottom half of the driver. Previous kernels
904 * had to poll every port to see if that port needed servicing.
905 */
906static void
c4028958 907do_softint(struct work_struct *work)
1da177e4 908{
c4028958
DH		 909 struct cyclades_port *info =
910 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 911 struct tty_struct *tty;
912
913 tty = info->tty;
914 if (!tty)
915 return;
916
917 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
918 tty_hangup(info->tty);
919 wake_up_interruptible(&info->open_wait);
920 info->flags &= ~ASYNC_NORMAL_ACTIVE;
921 }
922 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
923 wake_up_interruptible(&info->open_wait);
1da177e4 924#ifdef CONFIG_CYZ_INTR
3991428d
JS		 925 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
926 !timer_pending(&cyz_rx_full_timer[info->line]))
927 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
1da177e4 928#endif
02f1175c
JS		 929 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
930 wake_up_interruptible(&info->delta_msr_wait);
931 tty_wakeup(tty);
1da177e4 932#ifdef Z_WAKE
02f1175c 933 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
2c7fea99 934 complete(&info->shutdown_wait);
1da177e4
LT		 935#endif
936} /* do_softint */
937
938
939/***********************************************************/
940/********* Start of block of Cyclom-Y specific code ********/
941
942/* This routine waits up to 1000 micro-seconds for the previous
943 command to the Cirrus chip to complete and then issues the
944 new command. An error is returned if the previous command
945 didn't finish within the time limit.
946
947 This function is only called from inside spinlock-protected code.
948 */
02f1175c 949static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 950{
ad39c300 951 unsigned int i;
1da177e4 952
02f1175c
JS		 953 /* Check to see that the previous command has completed */
954 for (i = 0; i < 100; i++) {
db05c3b1 955 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 956 break;
957 }
958 udelay(10L);
1da177e4 959 }
02f1175c
JS		 960 /* if the CCR never cleared, the previous command
961 didn't finish within the "reasonable time" */
962 if (i == 100)
096dcfce 963 return -1;
1da177e4 964
02f1175c
JS		 965 /* Issue the new command */
966 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 967
096dcfce 968 return 0;
02f1175c 969} /* cyy_issue_cmd */
1da177e4
LT		 970
971#ifdef CONFIG_ISA
972/* ISA interrupt detection code */
02f1175c 973static unsigned detect_isa_irq(void __iomem * address)
1da177e4 974{
02f1175c
JS		 975 int irq;
976 unsigned long irqs, flags;
977 int save_xir, save_car;
978 int index = 0; /* IRQ probing is only for ISA */
979
980 /* forget possible initially masked and pending IRQ */
981 irq = probe_irq_off(probe_irq_on());
982
983 /* Clear interrupts on the board first */
984 cy_writeb(address + (Cy_ClrIntr << index), 0);
985 /* Cy_ClrIntr is 0x1800 */
986
987 irqs = probe_irq_on();
988 /* Wait ... */
989 udelay(5000L);
990
991 /* Enable the Tx interrupts on the CD1400 */
992 local_irq_save(flags);
993 cy_writeb(address + (CyCAR << index), 0);
994 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
995
996 cy_writeb(address + (CyCAR << index), 0);
997 cy_writeb(address + (CySRER << index),
db05c3b1 998 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 999 local_irq_restore(flags);
1000
1001 /* Wait ... */
1002 udelay(5000L);
1003
1004 /* Check which interrupt is in use */
1005 irq = probe_irq_off(irqs);
1006
1007 /* Clean up */
db05c3b1
JS		 1008 save_xir = (u_char) readb(address + (CyTIR << index));
1009 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 1010 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1011 cy_writeb(address + (CySRER << index),
db05c3b1 1012 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 1013 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1014 cy_writeb(address + (CyCAR << index), (save_car));
1015 cy_writeb(address + (Cy_ClrIntr << index), 0);
1016 /* Cy_ClrIntr is 0x1800 */
1017
1018 return (irq > 0) ? irq : 0;
1da177e4 1019}
02f1175c 1020#endif /* CONFIG_ISA */
1da177e4 1021
e941027f 1022static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1023 void __iomem * base_addr, int status, int index)
e941027f
JS		 1024{
1025 struct cyclades_port *info;
1026 struct tty_struct *tty;
ad39c300 1027 int char_count;
e941027f
JS		 1028 int i, j, len, mdm_change, mdm_status, outch;
1029 int save_xir, channel, save_car;
1030 char data;
1031
02f1175c 1032 if (status & CySRReceive) { /* reception interrupt */
e941027f 1033#ifdef CY_DEBUG_INTERRUPTS
21719191 1034 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 1035#endif
02f1175c
JS		 1036 /* determine the channel & change to that context */
1037 spin_lock(&cinfo->card_lock);
db05c3b1 1038 save_xir = (u_char) readb(base_addr + (CyRIR << index));
02f1175c
JS		 1039 channel = (u_short) (save_xir & CyIRChannel);
1040 i = channel + chip * 4 + cinfo->first_line;
1041 info = &cy_port[i];
db05c3b1 1042 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1043 cy_writeb(base_addr + (CyCAR << index), save_xir);
1044
1045 /* if there is nowhere to put the data, discard it */
1046 if (info->tty == 0) {
db05c3b1 1047 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1048 CyIVRMask);
1049 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1050 data = readb(base_addr + (CyRDSR << index));
02f1175c 1051 } else { /* normal character reception */
db05c3b1 1052 char_count = readb(base_addr +
02f1175c
JS		 1053 (CyRDCR << index));
1054 while (char_count--) {
db05c3b1 1055 data = readb(base_addr +
02f1175c 1056 (CyRDSR << index));
e941027f 1057 }
e941027f 1058 }
02f1175c
JS		 1059 } else { /* there is an open port for this data */
1060 tty = info->tty;
db05c3b1 1061 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1062 CyIVRMask);
1063 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1064 data = readb(base_addr + (CyRDSR << index));
02f1175c
JS		 1065
1066 /* For statistics only */
1067 if (data & CyBREAK)
1068 info->icount.brk++;
1069 else if (data & CyFRAME)
1070 info->icount.frame++;
1071 else if (data & CyPARITY)
1072 info->icount.parity++;
1073 else if (data & CyOVERRUN)
1074 info->icount.overrun++;
1075
1076 if (data & info->ignore_status_mask) {
1077 info->icount.rx++;
1078 return;
1079 }
1080 if (tty_buffer_request_room(tty, 1)) {
1081 if (data & info->read_status_mask) {
1082 if (data & CyBREAK) {
1083 tty_insert_flip_char(
1084 tty,
db05c3b1 1085 readb(
02f1175c
JS		 1086 base_addr +
1087 (CyRDSR <<
1088 index)),
1089 TTY_BREAK);
1090 info->icount.rx++;
1091 if (info->flags &
1092 ASYNC_SAK) {
1093 do_SAK(tty);
1094 }
1095 } else if (data & CyFRAME) {
1096 tty_insert_flip_char(
1097 tty,
db05c3b1 1098 readb(
02f1175c
JS		 1099 base_addr +
1100 (CyRDSR <<
1101 index)),
1102 TTY_FRAME);
1103 info->icount.rx++;
1104 info->idle_stats.
1105 frame_errs++;
1106 } else if (data & CyPARITY) {
1107 /* Pieces of seven... */
1108 tty_insert_flip_char(
1109 tty,
db05c3b1 1110 readb(
02f1175c
JS		 1111 base_addr +
1112 (CyRDSR <<
1113 index)),
1114 TTY_PARITY);
1115 info->icount.rx++;
1116 info->idle_stats.
1117 parity_errs++;
1118 } else if (data & CyOVERRUN) {
1119 tty_insert_flip_char(
1120 tty, 0,
1121 TTY_OVERRUN);
1122 info->icount.rx++;
1123 /* If the flip buffer itself is
1124 overflowing, we still lose
1125 the next incoming character.
1126 */
1127 tty_insert_flip_char(
1128 tty,
db05c3b1 1129 readb(
02f1175c
JS		 1130 base_addr +
1131 (CyRDSR <<
1132 index)),
1133 TTY_FRAME);
1134 info->icount.rx++;
1135 info->idle_stats.
1136 overruns++;
1137 /* These two conditions may imply */
1138 /* a normal read should be done. */
1139 /* }else if(data & CyTIMEOUT){ */
1140 /* }else if(data & CySPECHAR){ */
1141 } else {
1142 tty_insert_flip_char(
1143 tty, 0,
1144 TTY_NORMAL);
1145 info->icount.rx++;
1146 }
1147 } else {
1148 tty_insert_flip_char(tty, 0,
1149 TTY_NORMAL);
1150 info->icount.rx++;
1151 }
1152 } else {
1153 /* there was a software buffer
1154 overrun and nothing could be
1155 done about it!!! */
1156 info->icount.buf_overrun++;
1157 info->idle_stats.overruns++;
1158 }
1159 } else { /* normal character reception */
1160 /* load # chars available from the chip */
db05c3b1 1161 char_count = readb(base_addr +
02f1175c 1162 (CyRDCR << index));
e941027f
JS		 1163
1164#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1165 ++info->mon.int_count;
1166 info->mon.char_count += char_count;
1167 if (char_count > info->mon.char_max)
1168 info->mon.char_max = char_count;
1169 info->mon.char_last = char_count;
e941027f 1170#endif
02f1175c
JS		 1171 len = tty_buffer_request_room(tty, char_count);
1172 while (len--) {
db05c3b1 1173 data = readb(base_addr +
02f1175c
JS		 1174 (CyRDSR << index));
1175 tty_insert_flip_char(tty, data,
1176 TTY_NORMAL);
1177 info->idle_stats.recv_bytes++;
1178 info->icount.rx++;
e941027f 1179#ifdef CY_16Y_HACK
02f1175c 1180 udelay(10L);
e941027f 1181#endif
02f1175c
JS		 1182 }
1183 info->idle_stats.recv_idle = jiffies;
1184 }
1185 tty_schedule_flip(tty);
e941027f 1186 }
02f1175c
JS		 1187 /* end of service */
1188 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1189 cy_writeb(base_addr + (CyCAR << index), (save_car));
1190 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1191 }
1192
02f1175c
JS		 1193 if (status & CySRTransmit) { /* transmission interrupt */
1194 /* Since we only get here when the transmit buffer
1195 is empty, we know we can always stuff a dozen
1196 characters. */
e941027f 1197#ifdef CY_DEBUG_INTERRUPTS
21719191 1198 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 1199#endif
1200
02f1175c
JS		 1201 /* determine the channel & change to that context */
1202 spin_lock(&cinfo->card_lock);
db05c3b1 1203 save_xir = (u_char) readb(base_addr + (CyTIR << index));
02f1175c
JS		 1204 channel = (u_short) (save_xir & CyIRChannel);
1205 i = channel + chip * 4 + cinfo->first_line;
db05c3b1 1206 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1207 cy_writeb(base_addr + (CyCAR << index), save_xir);
1208
1209 /* validate the port# (as configured and open) */
1210 if ((i < 0) || (NR_PORTS <= i)) {
1211 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1212 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1213 ~CyTxRdy);
1214 goto txend;
e941027f 1215 }
02f1175c 1216 info = &cy_port[i];
02f1175c
JS		 1217 if (info->tty == 0) {
1218 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1219 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1220 ~CyTxRdy);
1221 goto txdone;
e941027f 1222 }
02f1175c
JS		 1223
1224 /* load the on-chip space for outbound data */
1225 char_count = info->xmit_fifo_size;
1226
1227 if (info->x_char) { /* send special char */
1228 outch = info->x_char;
1229 cy_writeb(base_addr + (CyTDR << index), outch);
1230 char_count--;
1231 info->icount.tx++;
1232 info->x_char = 0;
e941027f 1233 }
02f1175c
JS		 1234
1235 if (info->breakon || info->breakoff) {
1236 if (info->breakon) {
1237 cy_writeb(base_addr + (CyTDR << index), 0);
1238 cy_writeb(base_addr + (CyTDR << index), 0x81);
1239 info->breakon = 0;
1240 char_count -= 2;
1241 }
1242 if (info->breakoff) {
1243 cy_writeb(base_addr + (CyTDR << index), 0);
1244 cy_writeb(base_addr + (CyTDR << index), 0x83);
1245 info->breakoff = 0;
1246 char_count -= 2;
1247 }
e941027f 1248 }
02f1175c
JS		 1249
1250 while (char_count-- > 0) {
1251 if (!info->xmit_cnt) {
db05c3b1 1252 if (readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1253 CyTxMpty) {
1254 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1255 readb(base_addr +
02f1175c
JS		 1256 (CySRER << index)) &
1257 ~CyTxMpty);
1258 } else {
1259 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1260 (readb(base_addr +
02f1175c
JS		 1261 (CySRER << index)) &
1262 ~CyTxRdy) | CyTxMpty);
1263 }
1264 goto txdone;
1265 }
1266 if (info->xmit_buf == 0) {
1267 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1268 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1269 ~CyTxRdy);
1270 goto txdone;
1271 }
1272 if (info->tty->stopped || info->tty->hw_stopped) {
1273 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1274 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1275 ~CyTxRdy);
1276 goto txdone;
1277 }
1278 /* Because the Embedded Transmit Commands have
1279 been enabled, we must check to see if the
1280 escape character, NULL, is being sent. If it
1281 is, we must ensure that there is room for it
1282 to be doubled in the output stream. Therefore
1283 we no longer advance the pointer when the
1284 character is fetched, but rather wait until
1285 after the check for a NULL output character.
1286 This is necessary because there may not be
1287 room for the two chars needed to send a NULL.)
1288 */
1289 outch = info->xmit_buf[info->xmit_tail];
1290 if (outch) {
1291 info->xmit_cnt--;
1292 info->xmit_tail = (info->xmit_tail + 1) &
1293 (SERIAL_XMIT_SIZE - 1);
1294 cy_writeb(base_addr + (CyTDR << index), outch);
1295 info->icount.tx++;
1296 } else {
1297 if (char_count > 1) {
1298 info->xmit_cnt--;
1299 info->xmit_tail = (info->xmit_tail + 1)&
1300 (SERIAL_XMIT_SIZE - 1);
1301 cy_writeb(base_addr + (CyTDR << index),
1302 outch);
1303 cy_writeb(base_addr + (CyTDR << index),
1304 0);
1305 info->icount.tx++;
1306 char_count--;
1307 } else {
1308 }
1309 }
e941027f 1310 }
e941027f
JS		 1311
1312txdone:
02f1175c
JS		 1313 if (info->xmit_cnt < WAKEUP_CHARS) {
1314 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1315 }
e941027f 1316txend:
02f1175c
JS		 1317 /* end of service */
1318 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1319 cy_writeb(base_addr + (CyCAR << index), (save_car));
1320 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1321 }
1322
02f1175c 1323 if (status & CySRModem) { /* modem interrupt */
e941027f 1324
02f1175c
JS		 1325 /* determine the channel & change to that context */
1326 spin_lock(&cinfo->card_lock);
db05c3b1 1327 save_xir = (u_char) readb(base_addr + (CyMIR << index));
02f1175c
JS		 1328 channel = (u_short) (save_xir & CyIRChannel);
1329 info = &cy_port[channel + chip * 4 + cinfo->first_line];
db05c3b1 1330 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1331 cy_writeb(base_addr + (CyCAR << index), save_xir);
1332
db05c3b1
JS		 1333 mdm_change = readb(base_addr + (CyMISR << index));
1334 mdm_status = readb(base_addr + (CyMSVR1 << index));
02f1175c
JS		 1335
1336 if (info->tty == 0) { /* no place for data, ignore it */
1337 ;
1338 } else {
1339 if (mdm_change & CyANY_DELTA) {
1340 /* For statistics only */
1341 if (mdm_change & CyDCD)
1342 info->icount.dcd++;
1343 if (mdm_change & CyCTS)
1344 info->icount.cts++;
1345 if (mdm_change & CyDSR)
1346 info->icount.dsr++;
1347 if (mdm_change & CyRI)
1348 info->icount.rng++;
1349
1350 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1351 }
02f1175c
JS		 1352
1353 if ((mdm_change & CyDCD) &&
1354 (info->flags & ASYNC_CHECK_CD)) {
1355 if (mdm_status & CyDCD) {
1356 cy_sched_event(info,
1357 Cy_EVENT_OPEN_WAKEUP);
1358 } else {
1359 cy_sched_event(info, Cy_EVENT_HANGUP);
1360 }
1361 }
1362 if ((mdm_change & CyCTS) &&
1363 (info->flags & ASYNC_CTS_FLOW)) {
1364 if (info->tty->hw_stopped) {
1365 if (mdm_status & CyCTS) {
1366 /* cy_start isn't used
1367 because... !!! */
1368 info->tty->hw_stopped = 0;
1369 cy_writeb(base_addr +
1370 (CySRER << index),
db05c3b1 1371 readb(base_addr +
02f1175c
JS		 1372 (CySRER <<
1373 index))|
1374 CyTxRdy);
1375 cy_sched_event(info,
1376 Cy_EVENT_WRITE_WAKEUP);
1377 }
1378 } else {
1379 if (!(mdm_status & CyCTS)) {
1380 /* cy_stop isn't used
1381 because ... !!! */
1382 info->tty->hw_stopped = 1;
1383 cy_writeb(base_addr +
1384 (CySRER << index),
db05c3b1 1385 readb(base_addr +
02f1175c
JS		 1386 (CySRER <<
1387 index)) &
1388 ~CyTxRdy);
1389 }
1390 }
1391 }
1392 if (mdm_change & CyDSR) {
1393 }
1394 if (mdm_change & CyRI) {
e941027f 1395 }
e941027f 1396 }
02f1175c
JS		 1397 /* end of service */
1398 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1399 cy_writeb(base_addr + (CyCAR << index), save_car);
1400 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1401 }
1402}
1403
1da177e4
LT		 1404/* The real interrupt service routine is called
1405 whenever the card wants its hand held--chars
1406 received, out buffer empty, modem change, etc.
1407 */
02f1175c 1408static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1409{
02f1175c
JS		 1410 int status;
1411 struct cyclades_card *cinfo;
1412 void __iomem *base_addr, *card_base_addr;
1413 int chip;
1414 int index;
1415 int too_many;
1416 int had_work;
1417
1418 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1419#ifdef CY_DEBUG_INTERRUPTS
21719191 1420 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1da177e4 1421#endif
02f1175c
JS		 1422 return IRQ_NONE; /* spurious interrupt */
1423 }
1424
1425 card_base_addr = cinfo->base_addr;
1426 index = cinfo->bus_index;
1427
f1e83c6c
JS		 1428 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1429 if (unlikely(card_base_addr == NULL))
1430 return IRQ_HANDLED;
1431
02f1175c
JS		 1432 /* This loop checks all chips in the card. Make a note whenever
1433 _any_ chip had some work to do, as this is considered an
1434 indication that there will be more to do. Only when no chip
1435 has any work does this outermost loop exit.
1436 */
1437 do {
1438 had_work = 0;
1439 for (chip = 0; chip < cinfo->num_chips; chip++) {
1440 base_addr = cinfo->base_addr +
1441 (cy_chip_offset[chip] << index);
1442 too_many = 0;
db05c3b1 1443 while ((status = readb(base_addr +
02f1175c
JS		 1444 (CySVRR << index))) != 0x00) {
1445 had_work++;
1446 /* The purpose of the following test is to ensure that
1447 no chip can monopolize the driver. This forces the
1448 chips to be checked in a round-robin fashion (after
1449 draining each of a bunch (1000) of characters).
1450 */
1451 if (1000 < too_many++) {
1452 break;
1453 }
1454 cyy_intr_chip(cinfo, chip, base_addr, status,
1455 index);
1456 }
1457 }
1458 } while (had_work);
1459
1460 /* clear interrupts */
1461 spin_lock(&cinfo->card_lock);
1462 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1463 /* Cy_ClrIntr is 0x1800 */
1464 spin_unlock(&cinfo->card_lock);
1465 return IRQ_HANDLED;
1466} /* cyy_interrupt */
1da177e4
LT		 1467
1468/***********************************************************/
1469/********* End of block of Cyclom-Y specific code **********/
1470/******** Start of block of Cyclades-Z specific code *********/
1471/***********************************************************/
1472
1473static int
02f1175c 1474cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1475 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1476{
02f1175c
JS		 1477 struct FIRM_ID __iomem *firm_id;
1478 struct ZFW_CTRL __iomem *zfw_ctrl;
1479 struct BOARD_CTRL __iomem *board_ctrl;
1480 unsigned long loc_doorbell;
1481
1482 firm_id = cinfo->base_addr + ID_ADDRESS;
1483 if (!ISZLOADED(*cinfo)) {
096dcfce 1484 return -1;
02f1175c 1485 }
db05c3b1 1486 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1487 board_ctrl = &zfw_ctrl->board_ctrl;
1488
db05c3b1 1489 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1490 (cinfo->ctl_addr))->loc_doorbell);
1491 if (loc_doorbell) {
1492 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1493 *channel = readl(&board_ctrl->fwcmd_channel);
1494 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1495 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1496 loc_doorbell, 0xffffffff);
1497 return 1;
1498 }
1499 return 0;
1500} /* cyz_fetch_msg */
1da177e4
LT		 1501
1502static int
02f1175c 1503cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1504 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1505{
02f1175c
JS		 1506 struct FIRM_ID __iomem *firm_id;
1507 struct ZFW_CTRL __iomem *zfw_ctrl;
1508 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1509 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1510 int index;
1511
1512 firm_id = cinfo->base_addr + ID_ADDRESS;
1513 if (!ISZLOADED(*cinfo)) {
096dcfce 1514 return -1;
02f1175c 1515 }
db05c3b1 1516 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1517 board_ctrl = &zfw_ctrl->board_ctrl;
1518
1519 index = 0;
1520 pci_doorbell =
1521 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1522 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1523 if (index++ == 1000) {
db05c3b1 1524 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1525 }
1526 udelay(50L);
1527 }
1528 cy_writel(&board_ctrl->hcmd_channel, channel);
1529 cy_writel(&board_ctrl->hcmd_param, param);
1530 cy_writel(pci_doorbell, (long)cmd);
1531
096dcfce 1532 return 0;
02f1175c 1533} /* cyz_issue_cmd */
1da177e4
LT		 1534
1535static void
ad39c300
JS		 1536cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1537 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1538{
875b206b 1539 struct cyclades_card *cinfo = info->card;
02f1175c 1540 struct tty_struct *tty = info->tty;
ad39c300 1541 int char_count;
02f1175c 1542 int len;
1da177e4 1543#ifdef BLOCKMOVE
ce71b0ff 1544 unsigned char *buf;
1da177e4 1545#else
02f1175c 1546 char data;
1da177e4 1547#endif
ad39c300 1548 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1549
db05c3b1
JS		 1550 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1551 rx_put = readl(&buf_ctrl->rx_put);
1552 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1553 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1554 if (rx_put >= rx_get)
1555 char_count = rx_put - rx_get;
1556 else
1557 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1558
02f1175c 1559 if (char_count) {
1da177e4 1560#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1561 info->mon.int_count++;
1562 info->mon.char_count += char_count;
1563 if (char_count > info->mon.char_max)
1564 info->mon.char_max = char_count;
1565 info->mon.char_last = char_count;
1da177e4 1566#endif
02f1175c
JS		 1567 if (tty == 0) {
1568 /* flush received characters */
1569 new_rx_get = (new_rx_get + char_count) &
1570 (rx_bufsize - 1);
1571 info->rflush_count++;
1572 } else {
1da177e4 1573#ifdef BLOCKMOVE
02f1175c
JS		 1574 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1575 for performance, but because of buffer boundaries, there
1576 may be several steps to the operation */
ce71b0ff
JS		 1577 while (1) {
1578 len = tty_prepare_flip_string(tty, &buf,
1579 char_count);
1580 if (!len)
1581 break;
1582
1583 len = min_t(unsigned int, min(len, char_count),
1584 rx_bufsize - new_rx_get);
1585
1586 memcpy_fromio(buf, cinfo->base_addr +
1587 rx_bufaddr + new_rx_get, len);
1588
1589 new_rx_get = (new_rx_get + len) &
02f1175c 1590 (rx_bufsize - 1);
ce71b0ff
JS		 1591 char_count -= len;
1592 info->icount.rx += len;
1593 info->idle_stats.recv_bytes += len;
02f1175c 1594 }
1da177e4 1595#else
02f1175c
JS		 1596 len = tty_buffer_request_room(tty, char_count);
1597 while (len--) {
db05c3b1 1598 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1599 new_rx_get);
1600 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1601 tty_insert_flip_char(tty, data, TTY_NORMAL);
1602 info->idle_stats.recv_bytes++;
1603 info->icount.rx++;
1604 }
1da177e4
LT		 1605#endif
1606#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1607 /* Recalculate the number of chars in the RX buffer and issue
1608 a cmd in case it's higher than the RX high water mark */
db05c3b1 1609 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1610 if (rx_put >= rx_get)
1611 char_count = rx_put - rx_get;
1612 else
1613 char_count = rx_put - rx_get + rx_bufsize;
db05c3b1 1614 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
02f1175c
JS		 1615 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1616 }
1da177e4 1617#endif
02f1175c
JS		 1618 info->idle_stats.recv_idle = jiffies;
1619 tty_schedule_flip(tty);
1620 }
1621 /* Update rx_get */
1622 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1623 }
1da177e4
LT		 1624}
1625
1626static void
ad39c300
JS		 1627cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1628 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1629{
875b206b 1630 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 1631 struct tty_struct *tty = info->tty;
1632 char data;
ad39c300 1633 int char_count;
1da177e4 1634#ifdef BLOCKMOVE
02f1175c 1635 int small_count;
1da177e4 1636#endif
ad39c300 1637 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1638
02f1175c
JS		 1639 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1640 return;
1da177e4 1641
db05c3b1
JS		 1642 tx_get = readl(&buf_ctrl->tx_get);
1643 tx_put = readl(&buf_ctrl->tx_put);
1644 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1645 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1646 if (tx_put >= tx_get)
1647 char_count = tx_get - tx_put - 1 + tx_bufsize;
1648 else
1649 char_count = tx_get - tx_put - 1;
1da177e4 1650
02f1175c 1651 if (char_count) {
1da177e4 1652
02f1175c
JS		 1653 if (tty == 0) {
1654 goto ztxdone;
1655 }
1da177e4 1656
02f1175c
JS		 1657 if (info->x_char) { /* send special char */
1658 data = info->x_char;
1da177e4 1659
02f1175c
JS		 1660 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1661 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1662 info->x_char = 0;
1663 char_count--;
1664 info->icount.tx++;
02f1175c 1665 }
1da177e4 1666#ifdef BLOCKMOVE
02f1175c
JS		 1667 while (0 < (small_count = min_t(unsigned int,
1668 tx_bufsize - tx_put, min_t(unsigned int,
1669 (SERIAL_XMIT_SIZE - info->xmit_tail),
1670 min_t(unsigned int, info->xmit_cnt,
1671 char_count))))) {
1672
1673 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1674 tx_put),
1675 &info->xmit_buf[info->xmit_tail],
1676 small_count);
1677
1678 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1679 char_count -= small_count;
1680 info->icount.tx += small_count;
1681 info->xmit_cnt -= small_count;
1682 info->xmit_tail = (info->xmit_tail + small_count) &
1683 (SERIAL_XMIT_SIZE - 1);
02f1175c 1684 }
1da177e4 1685#else
02f1175c
JS		 1686 while (info->xmit_cnt && char_count) {
1687 data = info->xmit_buf[info->xmit_tail];
1688 info->xmit_cnt--;
1689 info->xmit_tail = (info->xmit_tail + 1) &
1690 (SERIAL_XMIT_SIZE - 1);
1691
1692 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1693 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1694 char_count--;
1695 info->icount.tx++;
02f1175c 1696 }
1da177e4 1697#endif
02f1175c
JS		 1698ztxdone:
1699 if (info->xmit_cnt < WAKEUP_CHARS) {
1700 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1701 }
1702 /* Update tx_put */
1703 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1704 }
1da177e4
LT		 1705}
1706
02f1175c 1707static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1708{
02f1175c
JS		 1709 struct tty_struct *tty;
1710 struct cyclades_port *info;
ad39c300
JS		 1711 static struct FIRM_ID __iomem *firm_id;
1712 static struct ZFW_CTRL __iomem *zfw_ctrl;
1713 static struct BOARD_CTRL __iomem *board_ctrl;
1714 static struct CH_CTRL __iomem *ch_ctrl;
1715 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1716 __u32 channel;
1717 __u8 cmd;
1718 __u32 param;
1719 __u32 hw_ver, fw_ver;
02f1175c
JS		 1720 int special_count;
1721 int delta_count;
1722
1723 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1724 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1725 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1726 fw_ver = readl(&board_ctrl->fw_version);
1727 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1728 mail_box_0);
1729
1730 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1731 special_count = 0;
1732 delta_count = 0;
1733 info = &cy_port[channel + cinfo->first_line];
1734 if ((tty = info->tty) == 0) {
1735 continue;
1da177e4 1736 }
02f1175c
JS		 1737 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1738 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1739
1740 switch (cmd) {
1741 case C_CM_PR_ERROR:
1742 tty_insert_flip_char(tty, 0, TTY_PARITY);
1743 info->icount.rx++;
1744 special_count++;
1745 break;
1746 case C_CM_FR_ERROR:
1747 tty_insert_flip_char(tty, 0, TTY_FRAME);
1748 info->icount.rx++;
1749 special_count++;
1750 break;
1751 case C_CM_RXBRK:
1752 tty_insert_flip_char(tty, 0, TTY_BREAK);
1753 info->icount.rx++;
1754 special_count++;
1755 break;
1756 case C_CM_MDCD:
1757 info->icount.dcd++;
1758 delta_count++;
1759 if (info->flags & ASYNC_CHECK_CD) {
1760 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1761 readl(&ch_ctrl->rs_status)) &
02f1175c
JS		 1762 C_RS_DCD) {
1763 cy_sched_event(info,
1764 Cy_EVENT_OPEN_WAKEUP);
1765 } else {
1766 cy_sched_event(info, Cy_EVENT_HANGUP);
1767 }
1768 }
1769 break;
1770 case C_CM_MCTS:
1771 info->icount.cts++;
1772 delta_count++;
1773 break;
1774 case C_CM_MRI:
1775 info->icount.rng++;
1776 delta_count++;
1777 break;
1778 case C_CM_MDSR:
1779 info->icount.dsr++;
1780 delta_count++;
1781 break;
1da177e4 1782#ifdef Z_WAKE
02f1175c
JS		 1783 case C_CM_IOCTLW:
1784 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1785 break;
1da177e4
LT		 1786#endif
1787#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1788 case C_CM_RXHIWM:
1789 case C_CM_RXNNDT:
1790 case C_CM_INTBACK2:
1791 /* Reception Interrupt */
1da177e4 1792#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1793 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1794 "port %ld\n", info->card, channel);
1da177e4 1795#endif
02f1175c
JS		 1796 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1797 break;
1798 case C_CM_TXBEMPTY:
1799 case C_CM_TXLOWWM:
1800 case C_CM_INTBACK:
1801 /* Transmission Interrupt */
1da177e4 1802#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1803 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1804 "port %ld\n", info->card, channel);
1da177e4 1805#endif
02f1175c
JS		 1806 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1807 break;
1808#endif /* CONFIG_CYZ_INTR */
1809 case C_CM_FATAL:
1810 /* should do something with this !!! */
1811 break;
1812 default:
1813 break;
1814 }
1815 if (delta_count)
1816 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1817 if (special_count)
1818 tty_schedule_flip(tty);
1da177e4 1819 }
1da177e4
LT		 1820}
1821
1822#ifdef CONFIG_CYZ_INTR
02f1175c 1823static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1824{
02f1175c 1825 struct cyclades_card *cinfo;
1da177e4 1826
02f1175c 1827 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1828#ifdef CY_DEBUG_INTERRUPTS
21719191 1829 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1da177e4 1830#endif
02f1175c
JS		 1831 return IRQ_NONE; /* spurious interrupt */
1832 }
1da177e4 1833
02f1175c 1834 if (!ISZLOADED(*cinfo)) {
1da177e4 1835#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1836 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1837 "(IRQ%d).\n", irq);
1da177e4 1838#endif
02f1175c
JS		 1839 return IRQ_NONE;
1840 }
1da177e4 1841
02f1175c
JS		 1842 /* Handle the interrupts */
1843 cyz_handle_cmd(cinfo);
1da177e4 1844
02f1175c
JS		 1845 return IRQ_HANDLED;
1846} /* cyz_interrupt */
1da177e4 1847
02f1175c 1848static void cyz_rx_restart(unsigned long arg)
1da177e4 1849{
02f1175c 1850 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1851 struct cyclades_card *card = info->card;
02f1175c 1852 int retval;
875b206b 1853 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1854 unsigned long flags;
1855
9fa1b3b1 1856 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1857 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1858 if (retval != 0) {
21719191 1859 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1860 info->line, retval);
1861 }
9fa1b3b1 1862 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1863}
1864
02f1175c 1865#else /* CONFIG_CYZ_INTR */
1da177e4 1866
02f1175c 1867static void cyz_poll(unsigned long arg)
1da177e4 1868{
02f1175c
JS		 1869 struct cyclades_card *cinfo;
1870 struct cyclades_port *info;
1871 struct tty_struct *tty;
ad39c300
JS		 1872 static struct FIRM_ID *firm_id;
1873 static struct ZFW_CTRL *zfw_ctrl;
1874 static struct BOARD_CTRL *board_ctrl;
1875 static struct CH_CTRL *ch_ctrl;
1876 static struct BUF_CTRL *buf_ctrl;
b7050906 1877 unsigned long expires = jiffies + HZ;
02f1175c 1878 int card, port;
1da177e4 1879
02f1175c
JS		 1880 for (card = 0; card < NR_CARDS; card++) {
1881 cinfo = &cy_card[card];
1882
1883 if (!IS_CYC_Z(*cinfo))
1884 continue;
1885 if (!ISZLOADED(*cinfo))
1886 continue;
1887
1888 firm_id = cinfo->base_addr + ID_ADDRESS;
1889 zfw_ctrl = cinfo->base_addr +
db05c3b1 1890 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1891 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1892
1893 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1894 if (!cinfo->intr_enabled) {
db05c3b1 1895 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1896 cinfo->intr_enabled = 1;
1897 continue;
1898 }
1da177e4 1899
02f1175c 1900 cyz_handle_cmd(cinfo);
1da177e4 1901
02f1175c
JS		 1902 for (port = 0; port < cinfo->nports; port++) {
1903 info = &cy_port[port + cinfo->first_line];
1904 tty = info->tty;
1905 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1906 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1907
02f1175c
JS		 1908 if (!info->throttle)
1909 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1910 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1911 }
1912 /* poll every 'cyz_polling_cycle' period */
b7050906 1913 expires = jiffies + cyz_polling_cycle;
1da177e4 1914 }
b7050906 1915 mod_timer(&cyz_timerlist, expires);
02f1175c 1916} /* cyz_poll */
1da177e4 1917
02f1175c 1918#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1919
1920/********** End of block of Cyclades-Z specific code *********/
1921/***********************************************************/
1922
1da177e4
LT		 1923/* This is called whenever a port becomes active;
1924 interrupts are enabled and DTR & RTS are turned on.
1925 */
02f1175c 1926static int startup(struct cyclades_port *info)
1da177e4 1927{
875b206b 1928 struct cyclades_card *card;
02f1175c
JS		 1929 unsigned long flags;
1930 int retval = 0;
1931 void __iomem *base_addr;
875b206b 1932 int chip, channel, index;
02f1175c 1933 unsigned long page;
1da177e4 1934
02f1175c 1935 card = info->card;
875b206b 1936 channel = info->line - card->first_line;
1da177e4 1937
02f1175c
JS		 1938 page = get_zeroed_page(GFP_KERNEL);
1939 if (!page)
1940 return -ENOMEM;
1da177e4 1941
9fa1b3b1 1942 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1943
02f1175c
JS		 1944 if (info->flags & ASYNC_INITIALIZED) {
1945 free_page(page);
1946 goto errout;
1947 }
1da177e4 1948
02f1175c
JS		 1949 if (!info->type) {
1950 if (info->tty) {
1951 set_bit(TTY_IO_ERROR, &info->tty->flags);
1952 }
1953 free_page(page);
1954 goto errout;
1955 }
1da177e4 1956
02f1175c
JS		 1957 if (info->xmit_buf)
1958 free_page(page);
1959 else
1960 info->xmit_buf = (unsigned char *)page;
1da177e4 1961
9fa1b3b1 1962 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1963
02f1175c 1964 set_line_char(info);
1da177e4 1965
875b206b 1966 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 1967 chip = channel >> 2;
1968 channel &= 0x03;
875b206b
JS		 1969 index = card->bus_index;
1970 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 1971
1972#ifdef CY_DEBUG_OPEN
21719191
JS		 1973 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1974 "base_addr %p\n",
1975 card, chip, channel, base_addr);
1da177e4 1976#endif
9fa1b3b1 1977 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1978
02f1175c 1979 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 1980
02f1175c
JS		 1981 cy_writeb(base_addr + (CyRTPR << index),
1982 (info->default_timeout ? info->default_timeout : 0x02));
1983 /* 10ms rx timeout */
1da177e4 1984
02f1175c
JS		 1985 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1986 index);
1da177e4 1987
02f1175c
JS		 1988 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1989 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1990 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 1991
1992#ifdef CY_DEBUG_DTR
21719191
JS		 1993 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1994 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 1995 readb(base_addr + (CyMSVR1 << index)),
1996 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 1997#endif
1998
02f1175c 1999 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2000 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 2001 info->flags |= ASYNC_INITIALIZED;
1da177e4 2002
02f1175c
JS		 2003 if (info->tty) {
2004 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2005 }
2006 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2007 info->breakon = info->breakoff = 0;
2008 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2009 info->idle_stats.in_use =
2010 info->idle_stats.recv_idle =
2011 info->idle_stats.xmit_idle = jiffies;
1da177e4 2012
9fa1b3b1 2013 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2014
02f1175c
JS		 2015 } else {
2016 struct FIRM_ID __iomem *firm_id;
2017 struct ZFW_CTRL __iomem *zfw_ctrl;
2018 struct BOARD_CTRL __iomem *board_ctrl;
2019 struct CH_CTRL __iomem *ch_ctrl;
2020 int retval;
1da177e4 2021
875b206b 2022 base_addr = card->base_addr;
1da177e4 2023
02f1175c 2024 firm_id = base_addr + ID_ADDRESS;
875b206b 2025 if (!ISZLOADED(*card)) {
02f1175c
JS		 2026 return -ENODEV;
2027 }
1da177e4 2028
875b206b 2029 zfw_ctrl = card->base_addr +
db05c3b1 2030 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2031 board_ctrl = &zfw_ctrl->board_ctrl;
2032 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2033
2034#ifdef CY_DEBUG_OPEN
21719191
JS		 2035 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2036 "base_addr %p\n", card, channel, base_addr);
1da177e4 2037#endif
9fa1b3b1 2038 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2039
02f1175c 2040 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2041#ifdef Z_WAKE
2042#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2043 cy_writel(&ch_ctrl[channel].intr_enable,
2044 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2045 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2046#else
02f1175c
JS		 2047 cy_writel(&ch_ctrl[channel].intr_enable,
2048 C_IN_IOCTLW | C_IN_MDCD);
2049#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2050#else
2051#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2052 cy_writel(&ch_ctrl[channel].intr_enable,
2053 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2054 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2055#else
02f1175c
JS		 2056 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2057#endif /* CONFIG_CYZ_INTR */
2058#endif /* Z_WAKE */
2059
875b206b 2060 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 2061 if (retval != 0) {
21719191
JS		 2062 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2063 "%x\n", info->line, retval);
02f1175c 2064 }
1da177e4 2065
02f1175c 2066 /* Flush RX buffers before raising DTR and RTS */
875b206b 2067 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 2068 if (retval != 0) {
21719191
JS		 2069 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2070 "%x\n", info->line, retval);
02f1175c 2071 }
1da177e4 2072
02f1175c
JS		 2073 /* set timeout !!! */
2074 /* set RTS and DTR !!! */
2075 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2076 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c 2077 C_RS_DTR);
9fa1b3b1 2078 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 2079 if (retval != 0) {
21719191
JS		 2080 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2081 "%x\n", info->line, retval);
02f1175c 2082 }
1da177e4 2083#ifdef CY_DEBUG_DTR
21719191 2084 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1da177e4
LT		 2085#endif
2086
02f1175c
JS		 2087 /* enable send, recv, modem !!! */
2088
2089 info->flags |= ASYNC_INITIALIZED;
2090 if (info->tty) {
2091 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2092 }
2093 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2094 info->breakon = info->breakoff = 0;
2095 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2096 info->idle_stats.in_use =
2097 info->idle_stats.recv_idle =
2098 info->idle_stats.xmit_idle = jiffies;
1da177e4 2099
9fa1b3b1 2100 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2101 }
1da177e4
LT		 2102
2103#ifdef CY_DEBUG_OPEN
21719191 2104 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 2105#endif
2106 return 0;
2107
2108errout:
9fa1b3b1 2109 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2110 return retval;
02f1175c 2111} /* startup */
1da177e4 2112
02f1175c 2113static void start_xmit(struct cyclades_port *info)
1da177e4 2114{
875b206b 2115 struct cyclades_card *card;
02f1175c
JS		 2116 unsigned long flags;
2117 void __iomem *base_addr;
875b206b 2118 int chip, channel, index;
1da177e4 2119
02f1175c 2120 card = info->card;
875b206b
JS		 2121 channel = info->line - card->first_line;
2122 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2123 chip = channel >> 2;
2124 channel &= 0x03;
875b206b
JS		 2125 index = card->bus_index;
2126 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 2127
9fa1b3b1 2128 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2129 cy_writeb(base_addr + (CyCAR << index), channel);
2130 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2131 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 2132 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2133 } else {
1da177e4 2134#ifdef CONFIG_CYZ_INTR
02f1175c 2135 int retval;
1da177e4 2136
9fa1b3b1 2137 spin_lock_irqsave(&card->card_lock, flags);
875b206b 2138 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 2139 if (retval != 0) {
21719191
JS		 2140 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2141 "%x\n", info->line, retval);
02f1175c 2142 }
9fa1b3b1 2143 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2144#else /* CONFIG_CYZ_INTR */
2145 /* Don't have to do anything at this time */
2146#endif /* CONFIG_CYZ_INTR */
2147 }
2148} /* start_xmit */
1da177e4
LT		 2149
2150/*
2151 * This routine shuts down a serial port; interrupts are disabled,
2152 * and DTR is dropped if the hangup on close termio flag is on.
2153 */
02f1175c 2154static void shutdown(struct cyclades_port *info)
1da177e4 2155{
875b206b 2156 struct cyclades_card *card;
02f1175c
JS		 2157 unsigned long flags;
2158 void __iomem *base_addr;
875b206b 2159 int chip, channel, index;
02f1175c
JS		 2160
2161 if (!(info->flags & ASYNC_INITIALIZED)) {
2162 return;
2163 }
2164
2165 card = info->card;
875b206b
JS		 2166 channel = info->line - card->first_line;
2167 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2168 chip = channel >> 2;
2169 channel &= 0x03;
875b206b
JS		 2170 index = card->bus_index;
2171 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 2172
2173#ifdef CY_DEBUG_OPEN
21719191
JS		 2174 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2175 "channel %d, base_addr %p\n",
2176 card, chip, channel, base_addr);
1da177e4
LT		 2177#endif
2178
9fa1b3b1 2179 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2180
2181 /* Clear delta_msr_wait queue to avoid mem leaks. */
2182 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2183
02f1175c
JS		 2184 if (info->xmit_buf) {
2185 unsigned char *temp;
2186 temp = info->xmit_buf;
2187 info->xmit_buf = NULL;
2188 free_page((unsigned long)temp);
2189 }
2190 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2191 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2192 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2193 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2194#ifdef CY_DEBUG_DTR
21719191
JS		 2195 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2196 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2197 readb(base_addr + (CyMSVR1 << index)),
2198 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2199#endif
02f1175c
JS		 2200 }
2201 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2202 /* it may be appropriate to clear _XMIT at
2203 some later date (after testing)!!! */
2204
2205 if (info->tty) {
2206 set_bit(TTY_IO_ERROR, &info->tty->flags);
2207 }
2208 info->flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 2209 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2210 } else {
2211 struct FIRM_ID __iomem *firm_id;
2212 struct ZFW_CTRL __iomem *zfw_ctrl;
2213 struct BOARD_CTRL __iomem *board_ctrl;
2214 struct CH_CTRL __iomem *ch_ctrl;
2215 int retval;
2216
875b206b 2217 base_addr = card->base_addr;
1da177e4 2218#ifdef CY_DEBUG_OPEN
21719191
JS		 2219 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2220 "base_addr %p\n", card, channel, base_addr);
1da177e4
LT		 2221#endif
2222
02f1175c 2223 firm_id = base_addr + ID_ADDRESS;
875b206b 2224 if (!ISZLOADED(*card)) {
02f1175c
JS		 2225 return;
2226 }
1da177e4 2227
875b206b 2228 zfw_ctrl = card->base_addr +
db05c3b1 2229 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2230 board_ctrl = &zfw_ctrl->board_ctrl;
2231 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2232
9fa1b3b1 2233 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2234
02f1175c
JS		 2235 if (info->xmit_buf) {
2236 unsigned char *temp;
2237 temp = info->xmit_buf;
2238 info->xmit_buf = NULL;
2239 free_page((unsigned long)temp);
1da177e4 2240 }
02f1175c
JS		 2241
2242 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2243 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2244 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c 2245 ~(C_RS_RTS | C_RS_DTR)));
875b206b 2246 retval = cyz_issue_cmd(info->card, channel,
02f1175c
JS		 2247 C_CM_IOCTLM, 0L);
2248 if (retval != 0) {
21719191
JS		 2249 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2250 "was %x\n", info->line, retval);
02f1175c 2251 }
1da177e4 2252#ifdef CY_DEBUG_DTR
21719191 2253 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
1da177e4 2254#endif
02f1175c 2255 }
1da177e4 2256
02f1175c
JS		 2257 if (info->tty) {
2258 set_bit(TTY_IO_ERROR, &info->tty->flags);
2259 }
2260 info->flags &= ~ASYNC_INITIALIZED;
2261
9fa1b3b1 2262 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2263 }
1da177e4
LT		 2264
2265#ifdef CY_DEBUG_OPEN
21719191 2266 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 2267#endif
02f1175c 2268} /* shutdown */
1da177e4
LT		 2269
2270/*
2271 * ------------------------------------------------------------
2272 * cy_open() and friends
2273 * ------------------------------------------------------------
2274 */
2275
2276static int
02f1175c
JS		 2277block_til_ready(struct tty_struct *tty, struct file *filp,
2278 struct cyclades_port *info)
1da177e4 2279{
02f1175c
JS		 2280 DECLARE_WAITQUEUE(wait, current);
2281 struct cyclades_card *cinfo;
2282 unsigned long flags;
2283 int chip, channel, index;
2284 int retval;
2285 void __iomem *base_addr;
2286
875b206b 2287 cinfo = info->card;
02f1175c
JS		 2288 channel = info->line - cinfo->first_line;
2289
2290 /*
2291 * If the device is in the middle of being closed, then block
2292 * until it's done, and then try again.
2293 */
2294 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2295 wait_event_interruptible(info->close_wait,
2296 !(info->flags & ASYNC_CLOSING));
096dcfce 2297 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2298 }
02f1175c
JS		 2299
2300 /*
2301 * If non-blocking mode is set, then make the check up front
2302 * and then exit.
2303 */
2304 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2305 info->flags |= ASYNC_NORMAL_ACTIVE;
2306 return 0;
2307 }
2308
2309 /*
2310 * Block waiting for the carrier detect and the line to become
2311 * free (i.e., not in use by the callout). While we are in
2312 * this loop, info->count is dropped by one, so that
2313 * cy_close() knows when to free things. We restore it upon
2314 * exit, either normal or abnormal.
2315 */
2316 retval = 0;
2317 add_wait_queue(&info->open_wait, &wait);
1da177e4 2318#ifdef CY_DEBUG_OPEN
21719191
JS		 2319 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2320 "count = %d\n", info->line, info->count);
1da177e4 2321#endif
9fa1b3b1 2322 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2323 if (!tty_hung_up_p(filp))
2324 info->count--;
9fa1b3b1 2325 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2326#ifdef CY_DEBUG_COUNT
21719191
JS		 2327 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2328 "%d\n", current->pid, info->count);
1da177e4 2329#endif
02f1175c
JS		 2330 info->blocked_open++;
2331
2332 if (!IS_CYC_Z(*cinfo)) {
2333 chip = channel >> 2;
2334 channel &= 0x03;
2335 index = cinfo->bus_index;
2336 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2337
2338 while (1) {
9fa1b3b1 2339 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2340 if ((tty->termios->c_cflag & CBAUD)) {
2341 cy_writeb(base_addr + (CyCAR << index),
2342 (u_char) channel);
2343 cy_writeb(base_addr + (CyMSVR1 << index),
2344 CyRTS);
2345 cy_writeb(base_addr + (CyMSVR2 << index),
2346 CyDTR);
1da177e4 2347#ifdef CY_DEBUG_DTR
21719191
JS		 2348 printk(KERN_DEBUG "cyc:block_til_ready raising "
2349 "DTR\n");
2350 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2351 readb(base_addr + (CyMSVR1 << index)),
2352 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2353#endif
02f1175c 2354 }
9fa1b3b1 2355 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2356
02f1175c
JS		 2357 set_current_state(TASK_INTERRUPTIBLE);
2358 if (tty_hung_up_p(filp) ||
2359 !(info->flags & ASYNC_INITIALIZED)) {
2360 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2361 -EAGAIN : -ERESTARTSYS);
2362 break;
2363 }
1da177e4 2364
9fa1b3b1 2365 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2366 cy_writeb(base_addr + (CyCAR << index),
2367 (u_char) channel);
2368 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2369 (readb(base_addr +
02f1175c 2370 (CyMSVR1 << index)) & CyDCD))) {
9fa1b3b1 2371 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c
JS		 2372 break;
2373 }
9fa1b3b1 2374 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2375
02f1175c
JS		 2376 if (signal_pending(current)) {
2377 retval = -ERESTARTSYS;
2378 break;
2379 }
1da177e4 2380#ifdef CY_DEBUG_OPEN
21719191
JS		 2381 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2382 "ttyC%d, count = %d\n",
2383 info->line, info->count);
1da177e4 2384#endif
02f1175c 2385 schedule();
1da177e4 2386 }
02f1175c
JS		 2387 } else {
2388 struct FIRM_ID __iomem *firm_id;
2389 struct ZFW_CTRL __iomem *zfw_ctrl;
2390 struct BOARD_CTRL __iomem *board_ctrl;
2391 struct CH_CTRL __iomem *ch_ctrl;
2392 int retval;
2393
2394 base_addr = cinfo->base_addr;
2395 firm_id = base_addr + ID_ADDRESS;
2396 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2397 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2398 remove_wait_queue(&info->open_wait, &wait);
2399 return -EINVAL;
2400 }
2401
db05c3b1 2402 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2403 board_ctrl = &zfw_ctrl->board_ctrl;
2404 ch_ctrl = zfw_ctrl->ch_ctrl;
2405
2406 while (1) {
2407 if ((tty->termios->c_cflag & CBAUD)) {
2408 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2409 readl(&ch_ctrl[channel].rs_control) |
2410 C_RS_RTS | C_RS_DTR);
9fa1b3b1 2411 retval = cyz_issue_cmd(cinfo,
db05c3b1 2412 channel, C_CM_IOCTLM, 0L);
02f1175c 2413 if (retval != 0) {
21719191
JS		 2414 printk(KERN_ERR "cyc:block_til_ready "
2415 "retval on ttyC%d was %x\n",
02f1175c
JS		 2416 info->line, retval);
2417 }
1da177e4 2418#ifdef CY_DEBUG_DTR
21719191
JS		 2419 printk(KERN_DEBUG "cyc:block_til_ready raising "
2420 "Z DTR\n");
1da177e4 2421#endif
02f1175c 2422 }
1da177e4 2423
02f1175c
JS		 2424 set_current_state(TASK_INTERRUPTIBLE);
2425 if (tty_hung_up_p(filp) ||
2426 !(info->flags & ASYNC_INITIALIZED)) {
2427 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2428 -EAGAIN : -ERESTARTSYS);
2429 break;
2430 }
2431 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2432 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2433 C_RS_DCD))) {
2434 break;
2435 }
2436 if (signal_pending(current)) {
2437 retval = -ERESTARTSYS;
2438 break;
2439 }
1da177e4 2440#ifdef CY_DEBUG_OPEN
21719191
JS		 2441 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2442 "ttyC%d, count = %d\n",
2443 info->line, info->count);
1da177e4 2444#endif
02f1175c
JS		 2445 schedule();
2446 }
1da177e4 2447 }
cc0a8fbb 2448 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2449 remove_wait_queue(&info->open_wait, &wait);
2450 if (!tty_hung_up_p(filp)) {
2451 info->count++;
1da177e4 2452#ifdef CY_DEBUG_COUNT
21719191
JS		 2453 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2454 "count to %d\n", current->pid, info->count);
1da177e4 2455#endif
02f1175c
JS		 2456 }
2457 info->blocked_open--;
1da177e4 2458#ifdef CY_DEBUG_OPEN
21719191
JS		 2459 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2460 "count = %d\n", info->line, info->count);
1da177e4 2461#endif
02f1175c
JS		 2462 if (retval)
2463 return retval;
2464 info->flags |= ASYNC_NORMAL_ACTIVE;
2465 return 0;
2466} /* block_til_ready */
1da177e4
LT		 2467
2468/*
2469 * This routine is called whenever a serial port is opened. It
2470 * performs the serial-specific initialization for the tty structure.
2471 */
02f1175c 2472static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2473{
02f1175c
JS		 2474 struct cyclades_port *info;
2475 int retval, line;
1da177e4 2476
02f1175c
JS		 2477 line = tty->index;
2478 if ((line < 0) || (NR_PORTS <= line)) {
2479 return -ENODEV;
2480 }
2481 info = &cy_port[line];
2482 if (info->line < 0) {
2483 return -ENODEV;
2484 }
1da177e4 2485
02f1175c
JS		 2486 /* If the card's firmware hasn't been loaded,
2487 treat it as absent from the system. This
2488 will make the user pay attention.
2489 */
875b206b
JS		 2490 if (IS_CYC_Z(*info->card)) {
2491 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 2492 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2493
2494 if (!ISZLOADED(*cinfo)) {
db05c3b1 2495 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2496 (cinfo->ctl_addr))->mail_box_0)) &&
2497 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2498 (ZFIRM_HLT == readl(
02f1175c 2499 &firm_id->signature))) {
21719191
JS		 2500 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2501 "need an external power supply for "
2502 "this number of ports.\nFirmware "
2503 "halted.\n");
02f1175c 2504 } else {
21719191
JS		 2505 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2506 "yet loaded\n");
02f1175c
JS		 2507 }
2508 return -ENODEV;
2509 }
2510#ifdef CONFIG_CYZ_INTR
2511 else {
2512 /* In case this Z board is operating in interrupt mode, its
2513 interrupts should be enabled as soon as the first open
2514 happens to one of its ports. */
2515 if (!cinfo->intr_enabled) {
2516 struct ZFW_CTRL __iomem *zfw_ctrl;
2517 struct BOARD_CTRL __iomem *board_ctrl;
2518
2519 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2520 (readl(&firm_id->zfwctrl_addr) &
2521 0xfffff);
02f1175c
JS		 2522
2523 board_ctrl = &zfw_ctrl->board_ctrl;
2524
2525 /* Enable interrupts on the PLX chip */
2526 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2527 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2528 /* Enable interrupts on the FW */
2529 retval = cyz_issue_cmd(cinfo, 0,
2530 C_CM_IRQ_ENBL, 0L);
2531 if (retval != 0) {
21719191
JS		 2532 printk(KERN_ERR "cyc:IRQ enable retval "
2533 "was %x\n", retval);
02f1175c
JS		 2534 }
2535 cinfo->nports =
db05c3b1 2536 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2537 cinfo->intr_enabled = 1;
2538 }
1da177e4 2539 }
02f1175c
JS		 2540#endif /* CONFIG_CYZ_INTR */
2541 /* Make sure this Z port really exists in hardware */
2542 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2543 return -ENODEV;
1da177e4 2544 }
1da177e4 2545#ifdef CY_DEBUG_OTHER
21719191 2546 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 2547#endif
02f1175c
JS		 2548 tty->driver_data = info;
2549 info->tty = tty;
2550 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2551 return -ENODEV;
2552 }
1da177e4 2553#ifdef CY_DEBUG_OPEN
21719191
JS		 2554 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2555 info->count);
1da177e4 2556#endif
02f1175c 2557 info->count++;
1da177e4 2558#ifdef CY_DEBUG_COUNT
21719191 2559 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
02f1175c 2560 current->pid, info->count);
1da177e4 2561#endif
1da177e4 2562
02f1175c
JS		 2563 /*
2564 * If the port is the middle of closing, bail out now
2565 */
2566 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2567 wait_event_interruptible(info->close_wait,
2568 !(info->flags & ASYNC_CLOSING));
096dcfce 2569 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2570 }
1da177e4 2571
02f1175c
JS		 2572 /*
2573 * Start up serial port
2574 */
2575 retval = startup(info);
2576 if (retval) {
2577 return retval;
2578 }
1da177e4 2579
02f1175c
JS		 2580 retval = block_til_ready(tty, filp, info);
2581 if (retval) {
1da177e4 2582#ifdef CY_DEBUG_OPEN
21719191
JS		 2583 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2584 "with %d\n", retval);
1da177e4 2585#endif
02f1175c
JS		 2586 return retval;
2587 }
1da177e4 2588
02f1175c 2589 info->throttle = 0;
1da177e4 2590
02f1175c 2591#ifdef CY_DEBUG_OPEN
21719191 2592 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 2593#endif
2594 return 0;
2595} /* cy_open */
1da177e4
LT		 2596
2597/*
2598 * cy_wait_until_sent() --- wait until the transmitter is empty
2599 */
02f1175c 2600static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2601{
875b206b 2602 struct cyclades_card *card;
cab9bdd1 2603 struct cyclades_port *info = tty->driver_data;
02f1175c 2604 void __iomem *base_addr;
875b206b 2605 int chip, channel, index;
02f1175c
JS		 2606 unsigned long orig_jiffies;
2607 int char_time;
2608
2609 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2610 return;
2611
2612 if (info->xmit_fifo_size == 0)
2613 return; /* Just in case.... */
1da177e4 2614
02f1175c
JS		 2615 orig_jiffies = jiffies;
2616 /*
2617 * Set the check interval to be 1/5 of the estimated time to
2618 * send a single character, and make it at least 1. The check
2619 * interval should also be less than the timeout.
2620 *
2621 * Note: we have to use pretty tight timings here to satisfy
2622 * the NIST-PCTS.
2623 */
2624 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2625 char_time = char_time / 5;
2626 if (char_time <= 0)
2627 char_time = 1;
2628 if (timeout < 0)
2629 timeout = 0;
2630 if (timeout)
2631 char_time = min(char_time, timeout);
2632 /*
2633 * If the transmitter hasn't cleared in twice the approximate
2634 * amount of time to send the entire FIFO, it probably won't
2635 * ever clear. This assumes the UART isn't doing flow
2636 * control, which is currently the case. Hence, if it ever
2637 * takes longer than info->timeout, this is probably due to a
2638 * UART bug of some kind. So, we clamp the timeout parameter at
2639 * 2*info->timeout.
2640 */
2641 if (!timeout || timeout > 2 * info->timeout)
2642 timeout = 2 * info->timeout;
1da177e4 2643#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2644 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2645 timeout, char_time, jiffies);
1da177e4 2646#endif
02f1175c 2647 card = info->card;
875b206b
JS		 2648 channel = (info->line) - (card->first_line);
2649 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2650 chip = channel >> 2;
2651 channel &= 0x03;
875b206b
JS		 2652 index = card->bus_index;
2653 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2654 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2655#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2656 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2657#endif
02f1175c
JS		 2658 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2659 break;
2660 if (timeout && time_after(jiffies, orig_jiffies +
2661 timeout))
2662 break;
2663 }
2664 } else {
096dcfce 2665 /* Nothing to do! */
1da177e4 2666 }
02f1175c
JS		 2667 /* Run one more char cycle */
2668 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2669#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2670 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2671#endif
2672}
2673
2674/*
2675 * This routine is called when a particular tty device is closed.
2676 */
02f1175c 2677static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2678{
cab9bdd1 2679 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2680 struct cyclades_card *card;
02f1175c 2681 unsigned long flags;
1da177e4
LT		 2682
2683#ifdef CY_DEBUG_OTHER
21719191 2684 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2685#endif
2686
02f1175c
JS		 2687 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2688 return;
2689 }
1da177e4 2690
9fa1b3b1
JS		 2691 card = info->card;
2692
2693 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2694 /* If the TTY is being hung up, nothing to do */
2695 if (tty_hung_up_p(filp)) {
9fa1b3b1 2696 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2697 return;
2698 }
1da177e4 2699#ifdef CY_DEBUG_OPEN
21719191
JS		 2700 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2701 info->count);
1da177e4 2702#endif
02f1175c
JS		 2703 if ((tty->count == 1) && (info->count != 1)) {
2704 /*
2705 * Uh, oh. tty->count is 1, which means that the tty
2706 * structure will be freed. Info->count should always
2707 * be one in these conditions. If it's greater than
2708 * one, we've got real problems, since it means the
2709 * serial port won't be shutdown.
2710 */
21719191
JS		 2711 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2712 "tty->count is 1, info->count is %d\n", info->count);
02f1175c
JS		 2713 info->count = 1;
2714 }
1da177e4 2715#ifdef CY_DEBUG_COUNT
21719191 2716 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
02f1175c 2717 current->pid, info->count - 1);
1da177e4 2718#endif
02f1175c 2719 if (--info->count < 0) {
1da177e4 2720#ifdef CY_DEBUG_COUNT
21719191 2721 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2722#endif
02f1175c 2723 info->count = 0;
1da177e4 2724 }
02f1175c 2725 if (info->count) {
9fa1b3b1 2726 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2727 return;
2728 }
2729 info->flags |= ASYNC_CLOSING;
1da177e4 2730
02f1175c
JS		 2731 /*
2732 * Now we wait for the transmit buffer to clear; and we notify
2733 * the line discipline to only process XON/XOFF characters.
2734 */
2735 tty->closing = 1;
9fa1b3b1 2736 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2737 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2738 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2739 }
9fa1b3b1 2740 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2741
9fa1b3b1
JS		 2742 if (!IS_CYC_Z(*card)) {
2743 int channel = info->line - card->first_line;
2744 int index = card->bus_index;
2745 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2746 (cy_chip_offset[channel >> 2] << index);
2747 /* Stop accepting input */
2748 channel &= 0x03;
2749 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2750 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2751 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2752 if (info->flags & ASYNC_INITIALIZED) {
2753 /* Waiting for on-board buffers to be empty before closing
2754 the port */
9fa1b3b1 2755 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2756 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2757 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2758 }
2759 } else {
2760#ifdef Z_WAKE
2761 /* Waiting for on-board buffers to be empty before closing the port */
9fa1b3b1 2762 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2763 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2764 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2765 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2766 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2767 int channel = info->line - card->first_line;
02f1175c
JS		 2768 int retval;
2769
db05c3b1 2770 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2771 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2772 if (retval != 0) {
21719191
JS		 2773 printk(KERN_DEBUG "cyc:cy_close retval on "
2774 "ttyC%d was %x\n", info->line, retval);
02f1175c 2775 }
9fa1b3b1 2776 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2777 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2778 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2779 }
1da177e4 2780#endif
02f1175c
JS		 2781 }
2782
9fa1b3b1 2783 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2784 shutdown(info);
2785 if (tty->driver->flush_buffer)
2786 tty->driver->flush_buffer(tty);
2787 tty_ldisc_flush(tty);
9fa1b3b1 2788 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2789
2790 tty->closing = 0;
2791 info->event = 0;
2792 info->tty = NULL;
2793 if (info->blocked_open) {
9fa1b3b1 2794 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2795 if (info->close_delay) {
2796 msleep_interruptible(jiffies_to_msecs
2797 (info->close_delay));
2798 }
2799 wake_up_interruptible(&info->open_wait);
9fa1b3b1 2800 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2801 }
2802 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2803 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2804
2805#ifdef CY_DEBUG_OTHER
21719191 2806 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2807#endif
2808
9fa1b3b1 2809 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2810} /* cy_close */
1da177e4
LT		 2811
2812/* This routine gets called when tty_write has put something into
2813 * the write_queue. The characters may come from user space or
2814 * kernel space.
2815 *
2816 * This routine will return the number of characters actually
2817 * accepted for writing.
2818 *
2819 * If the port is not already transmitting stuff, start it off by
2820 * enabling interrupts. The interrupt service routine will then
2821 * ensure that the characters are sent.
2822 * If the port is already active, there is no need to kick it.
2823 *
2824 */
02f1175c 2825static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2826{
cab9bdd1 2827 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2828 unsigned long flags;
2829 int c, ret = 0;
1da177e4
LT		 2830
2831#ifdef CY_DEBUG_IO
21719191 2832 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2833#endif
2834
02f1175c
JS		 2835 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2836 return 0;
2837 }
1da177e4 2838
02f1175c
JS		 2839 if (!info->xmit_buf)
2840 return 0;
1da177e4 2841
9fa1b3b1 2842 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c
JS		 2843 while (1) {
2844 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2845 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2846
2847 if (c <= 0)
2848 break;
2849
2850 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2851 info->xmit_head = (info->xmit_head + c) &
2852 (SERIAL_XMIT_SIZE - 1);
2853 info->xmit_cnt += c;
2854 buf += c;
2855 count -= c;
2856 ret += c;
2857 }
9fa1b3b1 2858 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2859
2860 info->idle_stats.xmit_bytes += ret;
2861 info->idle_stats.xmit_idle = jiffies;
2862
2863 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2864 start_xmit(info);
2865 }
2866 return ret;
2867} /* cy_write */
1da177e4
LT		 2868
2869/*
2870 * This routine is called by the kernel to write a single
2871 * character to the tty device. If the kernel uses this routine,
2872 * it must call the flush_chars() routine (if defined) when it is
2873 * done stuffing characters into the driver. If there is no room
2874 * in the queue, the character is ignored.
2875 */
02f1175c 2876static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2877{
cab9bdd1 2878 struct cyclades_port *info = tty->driver_data;
02f1175c 2879 unsigned long flags;
1da177e4
LT		 2880
2881#ifdef CY_DEBUG_IO
21719191 2882 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2883#endif
2884
02f1175c
JS		 2885 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2886 return;
1da177e4 2887
02f1175c
JS		 2888 if (!info->xmit_buf)
2889 return;
1da177e4 2890
9fa1b3b1 2891 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2892 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2893 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2894 return;
2895 }
1da177e4 2896
02f1175c
JS		 2897 info->xmit_buf[info->xmit_head++] = ch;
2898 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2899 info->xmit_cnt++;
1da177e4
LT		 2900 info->idle_stats.xmit_bytes++;
2901 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2902 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 2903} /* cy_put_char */
1da177e4
LT		 2904
2905/*
2906 * This routine is called by the kernel after it has written a
2907 * series of characters to the tty device using put_char().
2908 */
02f1175c 2909static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2910{
cab9bdd1 2911 struct cyclades_port *info = tty->driver_data;
02f1175c 2912
1da177e4 2913#ifdef CY_DEBUG_IO
21719191 2914 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2915#endif
2916
02f1175c
JS		 2917 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2918 return;
1da177e4 2919
02f1175c
JS		 2920 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2921 !info->xmit_buf)
2922 return;
1da177e4 2923
02f1175c
JS		 2924 start_xmit(info);
2925} /* cy_flush_chars */
1da177e4
LT		 2926
2927/*
2928 * This routine returns the numbers of characters the tty driver
2929 * will accept for queuing to be written. This number is subject
2930 * to change as output buffers get emptied, or if the output flow
2931 * control is activated.
2932 */
02f1175c 2933static int cy_write_room(struct tty_struct *tty)
1da177e4 2934{
cab9bdd1 2935 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2936 int ret;
2937
1da177e4 2938#ifdef CY_DEBUG_IO
21719191 2939 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2940#endif
2941
02f1175c
JS		 2942 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2943 return 0;
2944 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2945 if (ret < 0)
2946 ret = 0;
2947 return ret;
2948} /* cy_write_room */
1da177e4 2949
02f1175c 2950static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2951{
875b206b 2952 struct cyclades_card *card;
cab9bdd1 2953 struct cyclades_port *info = tty->driver_data;
875b206b 2954 int channel;
1da177e4 2955
02f1175c
JS		 2956 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2957 return 0;
2958
2959 card = info->card;
875b206b 2960 channel = (info->line) - (card->first_line);
1da177e4
LT		 2961
2962#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2963 if (!IS_CYC_Z(cy_card[card])) {
2964#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2965#ifdef CY_DEBUG_IO
21719191
JS		 2966 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2967 info->line, info->xmit_cnt);
1da177e4 2968#endif
02f1175c 2969 return info->xmit_cnt;
1da177e4 2970#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2971 } else {
ad39c300
JS		 2972 static struct FIRM_ID *firm_id;
2973 static struct ZFW_CTRL *zfw_ctrl;
2974 static struct CH_CTRL *ch_ctrl;
2975 static struct BUF_CTRL *buf_ctrl;
02f1175c 2976 int char_count;
ad39c300 2977 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2978
875b206b
JS		 2979 firm_id = card->base_addr + ID_ADDRESS;
2980 zfw_ctrl = card->base_addr +
db05c3b1 2981 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2982 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2983 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2984
db05c3b1
JS		 2985 tx_get = readl(&buf_ctrl->tx_get);
2986 tx_put = readl(&buf_ctrl->tx_put);
2987 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2988 if (tx_put >= tx_get)
2989 char_count = tx_put - tx_get;
2990 else
2991 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2992#ifdef CY_DEBUG_IO
21719191
JS		 2993 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2994 info->line, info->xmit_cnt + char_count);
1da177e4 2995#endif
096dcfce 2996 return info->xmit_cnt + char_count;
02f1175c
JS		 2997 }
2998#endif /* Z_EXT_CHARS_IN_BUFFER */
2999} /* cy_chars_in_buffer */
1da177e4
LT		 3000
3001/*
3002 * ------------------------------------------------------------
3003 * cy_ioctl() and friends
3004 * ------------------------------------------------------------
3005 */
3006
1a86b5e3 3007static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 3008{
02f1175c 3009 int co, co_val, bpr;
1a86b5e3 3010 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 3011 25000000);
1da177e4 3012
02f1175c
JS		 3013 if (baud == 0) {
3014 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3015 return;
3016 }
1da177e4 3017
02f1175c
JS		 3018 /* determine which prescaler to use */
3019 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3020 if (cy_clock / co_val / baud > 63)
3021 break;
3022 }
1da177e4 3023
02f1175c
JS		 3024 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3025 if (bpr > 255)
3026 bpr = 255;
1da177e4 3027
02f1175c
JS		 3028 info->tbpr = info->rbpr = bpr;
3029 info->tco = info->rco = co;
1da177e4
LT		 3030}
3031
3032/*
3033 * This routine finds or computes the various line characteristics.
3034 * It used to be called config_setup
3035 */
02f1175c 3036static void set_line_char(struct cyclades_port *info)
1da177e4 3037{
875b206b 3038 struct cyclades_card *card;
02f1175c
JS		 3039 unsigned long flags;
3040 void __iomem *base_addr;
875b206b 3041 int chip, channel, index;
02f1175c
JS		 3042 unsigned cflag, iflag;
3043 unsigned short chip_number;
3044 int baud, baud_rate = 0;
3045 int i;
3046
3047 if (!info->tty || !info->tty->termios) {
3048 return;
1da177e4 3049 }
02f1175c
JS		 3050 if (info->line == -1) {
3051 return;
1da177e4 3052 }
02f1175c
JS		 3053 cflag = info->tty->termios->c_cflag;
3054 iflag = info->tty->termios->c_iflag;
1da177e4 3055
02f1175c
JS		 3056 /*
3057 * Set up the tty->alt_speed kludge
3058 */
3059 if (info->tty) {
3060 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3061 info->tty->alt_speed = 57600;
3062 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3063 info->tty->alt_speed = 115200;
3064 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3065 info->tty->alt_speed = 230400;
3066 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3067 info->tty->alt_speed = 460800;
1da177e4 3068 }
02f1175c
JS		 3069
3070 card = info->card;
875b206b 3071 channel = info->line - card->first_line;
02f1175c
JS		 3072 chip_number = channel / 4;
3073
875b206b 3074 if (!IS_CYC_Z(*card)) {
02f1175c 3075
875b206b 3076 index = card->bus_index;
02f1175c
JS		 3077
3078 /* baud rate */
3079 baud = tty_get_baud_rate(info->tty);
3080 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3081 ASYNC_SPD_CUST) {
3082 if (info->custom_divisor)
3083 baud_rate = info->baud / info->custom_divisor;
3084 else
3085 baud_rate = info->baud;
3086 } else if (baud > CD1400_MAX_SPEED) {
3087 baud = CD1400_MAX_SPEED;
3088 }
3089 /* find the baud index */
3090 for (i = 0; i < 20; i++) {
3091 if (baud == baud_table[i]) {
3092 break;
3093 }
3094 }
3095 if (i == 20) {
3096 i = 19; /* CD1400_MAX_SPEED */
3097 }
3098
3099 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3100 ASYNC_SPD_CUST) {
3101 cyy_baud_calc(info, baud_rate);
3102 } else {
3103 if (info->chip_rev >= CD1400_REV_J) {
3104 /* It is a CD1400 rev. J or later */
3105 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3106 info->tco = baud_co_60[i]; /* Tx CO */
3107 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3108 info->rco = baud_co_60[i]; /* Rx CO */
3109 } else {
3110 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3111 info->tco = baud_co_25[i]; /* Tx CO */
3112 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3113 info->rco = baud_co_25[i]; /* Rx CO */
3114 }
3115 }
3116 if (baud_table[i] == 134) {
3117 /* get it right for 134.5 baud */
3118 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3119 2;
3120 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3121 ASYNC_SPD_CUST) {
3122 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3123 baud_rate) + 2;
3124 } else if (baud_table[i]) {
3125 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3126 baud_table[i]) + 2;
3127 /* this needs to be propagated into the card info */
3128 } else {
3129 info->timeout = 0;
3130 }
3131 /* By tradition (is it a standard?) a baud rate of zero
3132 implies the line should be/has been closed. A bit
3133 later in this routine such a test is performed. */
3134
3135 /* byte size and parity */
3136 info->cor5 = 0;
3137 info->cor4 = 0;
3138 /* receive threshold */
3139 info->cor3 = (info->default_threshold ?
3140 info->default_threshold : baud_cor3[i]);
3141 info->cor2 = CyETC;
3142 switch (cflag & CSIZE) {
3143 case CS5:
3144 info->cor1 = Cy_5_BITS;
3145 break;
3146 case CS6:
3147 info->cor1 = Cy_6_BITS;
3148 break;
3149 case CS7:
3150 info->cor1 = Cy_7_BITS;
3151 break;
3152 case CS8:
3153 info->cor1 = Cy_8_BITS;
3154 break;
3155 }
3156 if (cflag & CSTOPB) {
3157 info->cor1 |= Cy_2_STOP;
3158 }
3159 if (cflag & PARENB) {
3160 if (cflag & PARODD) {
3161 info->cor1 |= CyPARITY_O;
3162 } else {
3163 info->cor1 |= CyPARITY_E;
3164 }
3165 } else {
3166 info->cor1 |= CyPARITY_NONE;
3167 }
3168
3169 /* CTS flow control flag */
3170 if (cflag & CRTSCTS) {
3171 info->flags |= ASYNC_CTS_FLOW;
3172 info->cor2 |= CyCtsAE;
3173 } else {
3174 info->flags &= ~ASYNC_CTS_FLOW;
3175 info->cor2 &= ~CyCtsAE;
3176 }
3177 if (cflag & CLOCAL)
3178 info->flags &= ~ASYNC_CHECK_CD;
3179 else
3180 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3181
3182 /***********************************************
3183 The hardware option, CyRtsAO, presents RTS when
3184 the chip has characters to send. Since most modems
3185 use RTS as reverse (inbound) flow control, this
3186 option is not used. If inbound flow control is
3187 necessary, DTR can be programmed to provide the
3188 appropriate signals for use with a non-standard
3189 cable. Contact Marcio Saito for details.
3190 ***********************************************/
3191
02f1175c
JS		 3192 chip = channel >> 2;
3193 channel &= 0x03;
875b206b 3194 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3195
9fa1b3b1 3196 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3197 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3198
3199 /* tx and rx baud rate */
3200
3201 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3202 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3203 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3204 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3205
3206 /* set line characteristics according configuration */
3207
3208 cy_writeb(base_addr + (CySCHR1 << index),
3209 START_CHAR(info->tty));
3210 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3211 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3212 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3213 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3214 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3215 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3216
3217 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3218 CyCOR3ch, index);
3219
3220 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3221 cy_writeb(base_addr + (CyRTPR << index),
3222 (info->default_timeout ? info->default_timeout : 0x02));
3223 /* 10ms rx timeout */
3224
3225 if (C_CLOCAL(info->tty)) {
3226 /* without modem intr */
3227 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3228 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3229 /* act on 1->0 modem transitions */
3230 if ((cflag & CRTSCTS) && info->rflow) {
3231 cy_writeb(base_addr + (CyMCOR1 << index),
3232 (CyCTS | rflow_thr[i]));
3233 } else {
3234 cy_writeb(base_addr + (CyMCOR1 << index),
3235 CyCTS);
3236 }
3237 /* act on 0->1 modem transitions */
3238 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3239 } else {
02f1175c
JS		 3240 /* without modem intr */
3241 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3242 readb(base_addr +
02f1175c
JS		 3243 (CySRER << index)) | CyMdmCh);
3244 /* act on 1->0 modem transitions */
3245 if ((cflag & CRTSCTS) && info->rflow) {
3246 cy_writeb(base_addr + (CyMCOR1 << index),
3247 (CyDSR | CyCTS | CyRI | CyDCD |
3248 rflow_thr[i]));
3249 } else {
3250 cy_writeb(base_addr + (CyMCOR1 << index),
3251 CyDSR | CyCTS | CyRI | CyDCD);
3252 }
3253 /* act on 0->1 modem transitions */
3254 cy_writeb(base_addr + (CyMCOR2 << index),
3255 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3256 }
02f1175c
JS		 3257
3258 if (i == 0) { /* baud rate is zero, turn off line */
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 }
1da177e4 3266#ifdef CY_DEBUG_DTR
21719191
JS		 3267 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3268 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3269 readb(base_addr + (CyMSVR1 << index)),
3270 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3271#endif
02f1175c
JS		 3272 } else {
3273 if (info->rtsdtr_inv) {
3274 cy_writeb(base_addr + (CyMSVR1 << index),
3275 CyRTS);
3276 } else {
3277 cy_writeb(base_addr + (CyMSVR2 << index),
3278 CyDTR);
3279 }
1da177e4 3280#ifdef CY_DEBUG_DTR
21719191
JS		 3281 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3282 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3283 readb(base_addr + (CyMSVR1 << index)),
3284 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3285#endif
02f1175c 3286 }
1da177e4 3287
02f1175c
JS		 3288 if (info->tty) {
3289 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3290 }
9fa1b3b1 3291 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3292
1da177e4 3293 } else {
02f1175c
JS		 3294 struct FIRM_ID __iomem *firm_id;
3295 struct ZFW_CTRL __iomem *zfw_ctrl;
3296 struct BOARD_CTRL __iomem *board_ctrl;
3297 struct CH_CTRL __iomem *ch_ctrl;
3298 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3299 __u32 sw_flow;
02f1175c 3300 int retval;
1da177e4 3301
875b206b
JS		 3302 firm_id = card->base_addr + ID_ADDRESS;
3303 if (!ISZLOADED(*card)) {
02f1175c
JS		 3304 return;
3305 }
1da177e4 3306
875b206b 3307 zfw_ctrl = card->base_addr +
db05c3b1 3308 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3309 board_ctrl = &zfw_ctrl->board_ctrl;
3310 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3311 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3312
3313 /* baud rate */
3314 baud = tty_get_baud_rate(info->tty);
3315 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3316 ASYNC_SPD_CUST) {
3317 if (info->custom_divisor)
3318 baud_rate = info->baud / info->custom_divisor;
3319 else
3320 baud_rate = info->baud;
3321 } else if (baud > CYZ_MAX_SPEED) {
3322 baud = CYZ_MAX_SPEED;
3323 }
3324 cy_writel(&ch_ctrl->comm_baud, baud);
3325
3326 if (baud == 134) {
3327 /* get it right for 134.5 baud */
3328 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3329 2;
3330 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3331 ASYNC_SPD_CUST) {
3332 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3333 baud_rate) + 2;
3334 } else if (baud) {
3335 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3336 baud) + 2;
3337 /* this needs to be propagated into the card info */
3338 } else {
3339 info->timeout = 0;
3340 }
1da177e4 3341
02f1175c
JS		 3342 /* byte size and parity */
3343 switch (cflag & CSIZE) {
3344 case CS5:
3345 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3346 break;
3347 case CS6:
3348 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3349 break;
3350 case CS7:
3351 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3352 break;
3353 case CS8:
3354 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3355 break;
3356 }
3357 if (cflag & CSTOPB) {
3358 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3359 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3360 } else {
3361 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3362 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3363 }
3364 if (cflag & PARENB) {
3365 if (cflag & PARODD) {
3366 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3367 } else {
3368 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3369 }
3370 } else {
3371 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3372 }
1da177e4 3373
02f1175c
JS		 3374 /* CTS flow control flag */
3375 if (cflag & CRTSCTS) {
3376 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3377 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3378 } else {
db05c3b1
JS		 3379 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3380 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3381 }
3382 /* As the HW flow control is done in firmware, the driver
3383 doesn't need to care about it */
3384 info->flags &= ~ASYNC_CTS_FLOW;
3385
3386 /* XON/XOFF/XANY flow control flags */
3387 sw_flow = 0;
3388 if (iflag & IXON) {
3389 sw_flow |= C_FL_OXX;
3390 if (iflag & IXANY)
3391 sw_flow |= C_FL_OIXANY;
3392 }
3393 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3394
875b206b 3395 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3396 if (retval != 0) {
21719191
JS		 3397 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3398 "was %x\n", info->line, retval);
02f1175c
JS		 3399 }
3400
3401 /* CD sensitivity */
3402 if (cflag & CLOCAL) {
3403 info->flags &= ~ASYNC_CHECK_CD;
3404 } else {
3405 info->flags |= ASYNC_CHECK_CD;
3406 }
1da177e4 3407
02f1175c
JS		 3408 if (baud == 0) { /* baud rate is zero, turn off line */
3409 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3410 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3411#ifdef CY_DEBUG_DTR
21719191 3412 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3413#endif
02f1175c
JS		 3414 } else {
3415 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3416 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3417#ifdef CY_DEBUG_DTR
21719191 3418 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3419#endif
02f1175c 3420 }
1da177e4 3421
875b206b 3422 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
02f1175c 3423 if (retval != 0) {
21719191
JS		 3424 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3425 "was %x\n", info->line, retval);
02f1175c 3426 }
1da177e4 3427
02f1175c
JS		 3428 if (info->tty) {
3429 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3430 }
1da177e4 3431 }
02f1175c 3432} /* set_line_char */
1da177e4
LT		 3433
3434static int
02f1175c
JS		 3435get_serial_info(struct cyclades_port *info,
3436 struct serial_struct __user * retinfo)
1da177e4 3437{
02f1175c 3438 struct serial_struct tmp;
875b206b 3439 struct cyclades_card *cinfo = info->card;
1da177e4 3440
02f1175c
JS		 3441 if (!retinfo)
3442 return -EFAULT;
3443 memset(&tmp, 0, sizeof(tmp));
3444 tmp.type = info->type;
3445 tmp.line = info->line;
875b206b
JS		 3446 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3447 cinfo->first_line;
02f1175c
JS		 3448 tmp.irq = cinfo->irq;
3449 tmp.flags = info->flags;
3450 tmp.close_delay = info->close_delay;
d5dedf99 3451 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3452 tmp.baud_base = info->baud;
3453 tmp.custom_divisor = info->custom_divisor;
3454 tmp.hub6 = 0; /*!!! */
3455 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3456} /* get_serial_info */
1da177e4
LT		 3457
3458static int
02f1175c
JS		 3459set_serial_info(struct cyclades_port *info,
3460 struct serial_struct __user * new_info)
1da177e4 3461{
02f1175c
JS		 3462 struct serial_struct new_serial;
3463 struct cyclades_port old_info;
3464
3465 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3466 return -EFAULT;
3467 old_info = *info;
3468
3469 if (!capable(CAP_SYS_ADMIN)) {
3470 if (new_serial.close_delay != info->close_delay ||
3471 new_serial.baud_base != info->baud ||
3472 (new_serial.flags & ASYNC_FLAGS &
3473 ~ASYNC_USR_MASK) !=
3474 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3475 return -EPERM;
3476 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3477 (new_serial.flags & ASYNC_USR_MASK);
3478 info->baud = new_serial.baud_base;
3479 info->custom_divisor = new_serial.custom_divisor;
3480 goto check_and_exit;
3481 }
3482
3483 /*
3484 * OK, past this point, all the error checking has been done.
3485 * At this point, we start making changes.....
3486 */
3487
3488 info->baud = new_serial.baud_base;
3489 info->custom_divisor = new_serial.custom_divisor;
3490 info->flags = (info->flags & ~ASYNC_FLAGS) |
3491 (new_serial.flags & ASYNC_FLAGS);
3492 info->close_delay = new_serial.close_delay * HZ / 100;
3493 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3494
3495check_and_exit:
02f1175c
JS		 3496 if (info->flags & ASYNC_INITIALIZED) {
3497 set_line_char(info);
3498 return 0;
3499 } else {
3500 return startup(info);
3501 }
3502} /* set_serial_info */
1da177e4
LT		 3503
3504/*
3505 * get_lsr_info - get line status register info
3506 *
3507 * Purpose: Let user call ioctl() to get info when the UART physically
3508 * is emptied. On bus types like RS485, the transmitter must
3509 * release the bus after transmitting. This must be done when
3510 * the transmit shift register is empty, not be done when the
3511 * transmit holding register is empty. This functionality
3512 * allows an RS485 driver to be written in user space.
3513 */
02f1175c 3514static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3515{
875b206b
JS		 3516 struct cyclades_card *card;
3517 int chip, channel, index;
02f1175c
JS		 3518 unsigned char status;
3519 unsigned int result;
3520 unsigned long flags;
3521 void __iomem *base_addr;
1da177e4 3522
02f1175c 3523 card = info->card;
875b206b
JS		 3524 channel = (info->line) - (card->first_line);
3525 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3526 chip = channel >> 2;
3527 channel &= 0x03;
875b206b
JS		 3528 index = card->bus_index;
3529 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3530
9fa1b3b1 3531 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3532 status = readb(base_addr + (CySRER << index)) &
02f1175c 3533 (CyTxRdy | CyTxMpty);
9fa1b3b1 3534 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3535 result = (status ? 0 : TIOCSER_TEMT);
3536 } else {
3537 /* Not supported yet */
3538 return -EINVAL;
3539 }
3540 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3541}
3542
02f1175c 3543static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3544{
cab9bdd1 3545 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3546 struct cyclades_card *card;
3547 int chip, channel, index;
02f1175c
JS		 3548 void __iomem *base_addr;
3549 unsigned long flags;
3550 unsigned char status;
3551 unsigned long lstatus;
3552 unsigned int result;
3553 struct FIRM_ID __iomem *firm_id;
3554 struct ZFW_CTRL __iomem *zfw_ctrl;
3555 struct BOARD_CTRL __iomem *board_ctrl;
3556 struct CH_CTRL __iomem *ch_ctrl;
3557
3558 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3559 return -ENODEV;
1da177e4 3560
02f1175c 3561 card = info->card;
875b206b
JS		 3562 channel = info->line - card->first_line;
3563 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3564 chip = channel >> 2;
3565 channel &= 0x03;
875b206b
JS		 3566 index = card->bus_index;
3567 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3568
9fa1b3b1 3569 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3570 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3571 status = readb(base_addr + (CyMSVR1 << index));
3572 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3573 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3574
3575 if (info->rtsdtr_inv) {
3576 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3577 ((status & CyDTR) ? TIOCM_RTS : 0);
3578 } else {
3579 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3580 ((status & CyDTR) ? TIOCM_DTR : 0);
3581 }
3582 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3583 ((status & CyRI) ? TIOCM_RNG : 0) |
3584 ((status & CyDSR) ? TIOCM_DSR : 0) |
3585 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3586 } else {
875b206b
JS		 3587 base_addr = card->base_addr;
3588 firm_id = card->base_addr + ID_ADDRESS;
3589 if (ISZLOADED(*card)) {
3590 zfw_ctrl = card->base_addr +
db05c3b1 3591 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3592 board_ctrl = &zfw_ctrl->board_ctrl;
3593 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3594 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3595 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3596 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3597 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3598 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3599 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3600 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3601 } else {
3602 result = 0;
3603 return -ENODEV;
3604 }
1da177e4 3605
02f1175c
JS		 3606 }
3607 return result;
3608} /* cy_tiomget */
1da177e4
LT		 3609
3610static int
3611cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3612 unsigned int set, unsigned int clear)
1da177e4 3613{
cab9bdd1 3614 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3615 struct cyclades_card *card;
3616 int chip, channel, index;
02f1175c
JS		 3617 void __iomem *base_addr;
3618 unsigned long flags;
3619 struct FIRM_ID __iomem *firm_id;
3620 struct ZFW_CTRL __iomem *zfw_ctrl;
3621 struct BOARD_CTRL __iomem *board_ctrl;
3622 struct CH_CTRL __iomem *ch_ctrl;
3623 int retval;
3624
3625 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3626 return -ENODEV;
3627
3628 card = info->card;
875b206b
JS		 3629 channel = (info->line) - (card->first_line);
3630 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3631 chip = channel >> 2;
3632 channel &= 0x03;
875b206b
JS		 3633 index = card->bus_index;
3634 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3635
3636 if (set & TIOCM_RTS) {
9fa1b3b1 3637 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3638 cy_writeb(base_addr + (CyCAR << index),
3639 (u_char) channel);
3640 if (info->rtsdtr_inv) {
3641 cy_writeb(base_addr + (CyMSVR2 << index),
3642 CyDTR);
3643 } else {
3644 cy_writeb(base_addr + (CyMSVR1 << index),
3645 CyRTS);
3646 }
9fa1b3b1 3647 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3648 }
3649 if (clear & TIOCM_RTS) {
9fa1b3b1 3650 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3651 cy_writeb(base_addr + (CyCAR << index),
3652 (u_char) channel);
3653 if (info->rtsdtr_inv) {
3654 cy_writeb(base_addr + (CyMSVR2 << index),
3655 ~CyDTR);
3656 } else {
3657 cy_writeb(base_addr + (CyMSVR1 << index),
3658 ~CyRTS);
3659 }
9fa1b3b1 3660 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3661 }
3662 if (set & TIOCM_DTR) {
9fa1b3b1 3663 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3664 cy_writeb(base_addr + (CyCAR << index),
3665 (u_char) channel);
3666 if (info->rtsdtr_inv) {
3667 cy_writeb(base_addr + (CyMSVR1 << index),
3668 CyRTS);
3669 } else {
3670 cy_writeb(base_addr + (CyMSVR2 << index),
3671 CyDTR);
3672 }
1da177e4 3673#ifdef CY_DEBUG_DTR
21719191
JS		 3674 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3675 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3676 readb(base_addr + (CyMSVR1 << index)),
3677 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3678#endif
9fa1b3b1 3679 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3680 }
3681 if (clear & TIOCM_DTR) {
9fa1b3b1 3682 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3683 cy_writeb(base_addr + (CyCAR << index),
3684 (u_char) channel);
3685 if (info->rtsdtr_inv) {
3686 cy_writeb(base_addr + (CyMSVR1 << index),
3687 ~CyRTS);
3688 } else {
3689 cy_writeb(base_addr + (CyMSVR2 << index),
3690 ~CyDTR);
3691 }
1da177e4
LT		 3692
3693#ifdef CY_DEBUG_DTR
21719191
JS		 3694 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3695 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3696 readb(base_addr + (CyMSVR1 << index)),
3697 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3698#endif
9fa1b3b1 3699 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3700 }
3701 } else {
875b206b 3702 base_addr = card->base_addr;
02f1175c 3703
875b206b
JS		 3704 firm_id = card->base_addr + ID_ADDRESS;
3705 if (ISZLOADED(*card)) {
3706 zfw_ctrl = card->base_addr +
db05c3b1 3707 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3708 board_ctrl = &zfw_ctrl->board_ctrl;
3709 ch_ctrl = zfw_ctrl->ch_ctrl;
3710
3711 if (set & TIOCM_RTS) {
9fa1b3b1 3712 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3713 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3714 readl(&ch_ctrl[channel].rs_control) |
3715 C_RS_RTS);
9fa1b3b1 3716 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3717 }
3718 if (clear & TIOCM_RTS) {
9fa1b3b1 3719 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3720 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3721 readl(&ch_ctrl[channel].rs_control) &
3722 ~C_RS_RTS);
9fa1b3b1 3723 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3724 }
3725 if (set & TIOCM_DTR) {
9fa1b3b1 3726 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3727 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3728 readl(&ch_ctrl[channel].rs_control) |
3729 C_RS_DTR);
1da177e4 3730#ifdef CY_DEBUG_DTR
21719191
JS		 3731 printk(KERN_DEBUG "cyc:set_modem_info raising "
3732 "Z DTR\n");
1da177e4 3733#endif
9fa1b3b1 3734 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3735 }
3736 if (clear & TIOCM_DTR) {
9fa1b3b1 3737 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3738 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3739 readl(&ch_ctrl[channel].rs_control) &
3740 ~C_RS_DTR);
1da177e4 3741#ifdef CY_DEBUG_DTR
21719191
JS		 3742 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3743 "Z DTR\n");
1da177e4 3744#endif
9fa1b3b1 3745 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3746 }
3747 } else {
3748 return -ENODEV;
3749 }
9fa1b3b1
JS		 3750 spin_lock_irqsave(&card->card_lock, flags);
3751 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3752 if (retval != 0) {
21719191
JS		 3753 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3754 "was %x\n", info->line, retval);
02f1175c 3755 }
9fa1b3b1 3756 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3757 }
02f1175c
JS		 3758 return 0;
3759} /* cy_tiocmset */
1da177e4
LT		 3760
3761/*
3762 * cy_break() --- routine which turns the break handling on or off
3763 */
02f1175c 3764static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3765{
cab9bdd1 3766 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3767 struct cyclades_card *card;
02f1175c 3768 unsigned long flags;
1da177e4 3769
02f1175c
JS		 3770 if (serial_paranoia_check(info, tty->name, "cy_break"))
3771 return;
1da177e4 3772
9fa1b3b1
JS		 3773 card = info->card;
3774
3775 spin_lock_irqsave(&card->card_lock, flags);
3776 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3777 /* Let the transmit ISR take care of this (since it
3778 requires stuffing characters into the output stream).
3779 */
3780 if (break_state == -1) {
3781 if (!info->breakon) {
3782 info->breakon = 1;
3783 if (!info->xmit_cnt) {
9fa1b3b1 3784 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3785 start_xmit(info);
9fa1b3b1 3786 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3787 }
3788 }
3789 } else {
3790 if (!info->breakoff) {
3791 info->breakoff = 1;
3792 if (!info->xmit_cnt) {
9fa1b3b1 3793 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3794 start_xmit(info);
9fa1b3b1 3795 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3796 }
3797 }
1da177e4 3798 }
1da177e4 3799 } else {
02f1175c
JS		 3800 int retval;
3801
3802 if (break_state == -1) {
9fa1b3b1
JS		 3803 retval = cyz_issue_cmd(card,
3804 info->line - card->first_line,
02f1175c
JS		 3805 C_CM_SET_BREAK, 0L);
3806 if (retval != 0) {
21719191
JS		 3807 printk(KERN_ERR "cyc:cy_break (set) retval on "
3808 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3809 }
3810 } else {
9fa1b3b1
JS		 3811 retval = cyz_issue_cmd(card,
3812 info->line - card->first_line,
02f1175c
JS		 3813 C_CM_CLR_BREAK, 0L);
3814 if (retval != 0) {
21719191
JS		 3815 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3816 "on ttyC%d was %x\n", info->line,
3817 retval);
02f1175c 3818 }
1da177e4 3819 }
1da177e4 3820 }
9fa1b3b1 3821 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3822} /* cy_break */
1da177e4
LT		 3823
3824static int
02f1175c 3825get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3826{
3827
02f1175c
JS		 3828 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3829 return -EFAULT;
3830 info->mon.int_count = 0;
3831 info->mon.char_count = 0;
3832 info->mon.char_max = 0;
3833 info->mon.char_last = 0;
3834 return 0;
3835} /* get_mon_info */
1da177e4 3836
02f1175c 3837static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3838{
875b206b 3839 struct cyclades_card *card;
02f1175c 3840 void __iomem *base_addr;
875b206b 3841 int channel, chip, index;
02f1175c 3842 unsigned long flags;
1da177e4 3843
02f1175c 3844 card = info->card;
875b206b
JS		 3845 channel = info->line - card->first_line;
3846 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3847 chip = channel >> 2;
3848 channel &= 0x03;
875b206b 3849 index = card->bus_index;
02f1175c 3850 base_addr =
875b206b 3851 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3852
3853 info->cor3 &= ~CyREC_FIFO;
3854 info->cor3 |= value & CyREC_FIFO;
1da177e4 3855
9fa1b3b1 3856 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3857 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3858 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3859 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3860 } else {
096dcfce 3861 /* Nothing to do! */
02f1175c
JS		 3862 }
3863 return 0;
3864} /* set_threshold */
1da177e4
LT		 3865
3866static int
02f1175c 3867get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3868{
875b206b 3869 struct cyclades_card *card;
02f1175c 3870 void __iomem *base_addr;
875b206b 3871 int channel, chip, index;
02f1175c 3872 unsigned long tmp;
1da177e4 3873
02f1175c 3874 card = info->card;
875b206b
JS		 3875 channel = info->line - card->first_line;
3876 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3877 chip = channel >> 2;
3878 channel &= 0x03;
875b206b
JS		 3879 index = card->bus_index;
3880 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3881
db05c3b1 3882 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c
JS		 3883 return put_user(tmp, value);
3884 } else {
096dcfce 3885 /* Nothing to do! */
02f1175c
JS		 3886 return 0;
3887 }
3888} /* get_threshold */
1da177e4
LT		 3889
3890static int
02f1175c 3891set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3892{
02f1175c
JS		 3893 info->default_threshold = value & 0x0f;
3894 return 0;
3895} /* set_default_threshold */
1da177e4
LT		 3896
3897static int
02f1175c 3898get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3899{
02f1175c
JS		 3900 return put_user(info->default_threshold, value);
3901} /* get_default_threshold */
1da177e4 3902
02f1175c 3903static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3904{
875b206b 3905 struct cyclades_card *card;
02f1175c 3906 void __iomem *base_addr;
875b206b 3907 int channel, chip, index;
02f1175c 3908 unsigned long flags;
1da177e4 3909
02f1175c 3910 card = info->card;
875b206b
JS		 3911 channel = info->line - card->first_line;
3912 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3913 chip = channel >> 2;
3914 channel &= 0x03;
875b206b
JS		 3915 index = card->bus_index;
3916 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3917
9fa1b3b1 3918 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3919 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3920 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3921 } else {
096dcfce 3922 /* Nothing to do! */
02f1175c
JS		 3923 }
3924 return 0;
3925} /* set_timeout */
1da177e4 3926
02f1175c 3927static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3928{
875b206b 3929 struct cyclades_card *card;
02f1175c 3930 void __iomem *base_addr;
875b206b 3931 int channel, chip, index;
02f1175c 3932 unsigned long tmp;
1da177e4 3933
02f1175c 3934 card = info->card;
875b206b
JS		 3935 channel = info->line - card->first_line;
3936 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3937 chip = channel >> 2;
3938 channel &= 0x03;
875b206b
JS		 3939 index = card->bus_index;
3940 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3941
db05c3b1 3942 tmp = readb(base_addr + (CyRTPR << index));
02f1175c
JS		 3943 return put_user(tmp, value);
3944 } else {
096dcfce 3945 /* Nothing to do! */
02f1175c
JS		 3946 return 0;
3947 }
3948} /* get_timeout */
1da177e4 3949
02f1175c 3950static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3951{
02f1175c
JS		 3952 info->default_timeout = value & 0xff;
3953 return 0;
3954} /* set_default_timeout */
1da177e4
LT		 3955
3956static int
02f1175c 3957get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3958{
02f1175c
JS		 3959 return put_user(info->default_timeout, value);
3960} /* get_default_timeout */
1da177e4
LT		 3961
3962/*
3963 * This routine allows the tty driver to implement device-
3964 * specific ioctl's. If the ioctl number passed in cmd is
3965 * not recognized by the driver, it should return ENOIOCTLCMD.
3966 */
3967static int
02f1175c
JS		 3968cy_ioctl(struct tty_struct *tty, struct file *file,
3969 unsigned int cmd, unsigned long arg)
1da177e4 3970{
cab9bdd1 3971 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3972 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3973 struct serial_icounter_struct __user *p_cuser; /* user space */
3974 int ret_val = 0;
3975 unsigned long flags;
3976 void __user *argp = (void __user *)arg;
3977
3978 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3979 return -ENODEV;
1da177e4
LT		 3980
3981#ifdef CY_DEBUG_OTHER
21719191
JS		 3982 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3983 info->line, cmd, arg);
1da177e4
LT		 3984#endif
3985
02f1175c
JS		 3986 switch (cmd) {
3987 case CYGETMON:
3988 ret_val = get_mon_info(info, argp);
3989 break;
3990 case CYGETTHRESH:
3991 ret_val = get_threshold(info, argp);
3992 break;
3993 case CYSETTHRESH:
3994 ret_val = set_threshold(info, arg);
3995 break;
3996 case CYGETDEFTHRESH:
3997 ret_val = get_default_threshold(info, argp);
3998 break;
3999 case CYSETDEFTHRESH:
4000 ret_val = set_default_threshold(info, arg);
4001 break;
4002 case CYGETTIMEOUT:
4003 ret_val = get_timeout(info, argp);
4004 break;
4005 case CYSETTIMEOUT:
4006 ret_val = set_timeout(info, arg);
4007 break;
4008 case CYGETDEFTIMEOUT:
4009 ret_val = get_default_timeout(info, argp);
4010 break;
4011 case CYSETDEFTIMEOUT:
4012 ret_val = set_default_timeout(info, arg);
4013 break;
1da177e4 4014 case CYSETRFLOW:
02f1175c
JS		 4015 info->rflow = (int)arg;
4016 ret_val = 0;
4017 break;
1da177e4 4018 case CYGETRFLOW:
02f1175c
JS		 4019 ret_val = info->rflow;
4020 break;
1da177e4 4021 case CYSETRTSDTR_INV:
02f1175c
JS		 4022 info->rtsdtr_inv = (int)arg;
4023 ret_val = 0;
4024 break;
1da177e4 4025 case CYGETRTSDTR_INV:
02f1175c
JS		 4026 ret_val = info->rtsdtr_inv;
4027 break;
1da177e4 4028 case CYGETCD1400VER:
02f1175c
JS		 4029 ret_val = info->chip_rev;
4030 break;
1da177e4
LT		 4031#ifndef CONFIG_CYZ_INTR
4032 case CYZSETPOLLCYCLE:
02f1175c
JS		 4033 cyz_polling_cycle = (arg * HZ) / 1000;
4034 ret_val = 0;
4035 break;
1da177e4 4036 case CYZGETPOLLCYCLE:
02f1175c
JS		 4037 ret_val = (cyz_polling_cycle * 1000) / HZ;
4038 break;
4039#endif /* CONFIG_CYZ_INTR */
1da177e4 4040 case CYSETWAIT:
02f1175c
JS		 4041 info->closing_wait = (unsigned short)arg *HZ / 100;
4042 ret_val = 0;
4043 break;
1da177e4 4044 case CYGETWAIT:
02f1175c
JS		 4045 ret_val = info->closing_wait / (HZ / 100);
4046 break;
4047 case TIOCGSERIAL:
4048 ret_val = get_serial_info(info, argp);
4049 break;
4050 case TIOCSSERIAL:
4051 ret_val = set_serial_info(info, argp);
4052 break;
4053 case TIOCSERGETLSR: /* Get line status register */
4054 ret_val = get_lsr_info(info, argp);
4055 break;
4056 /*
4057 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4058 * - mask passed in arg for lines of interest
4059 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4060 * Caller should use TIOCGICOUNT to see which one it was
4061 */
1da177e4 4062 case TIOCMIWAIT:
9fa1b3b1 4063 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4064 /* note the counters on entry */
2c7fea99 4065 cnow = info->icount;
9fa1b3b1 4066 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 4067 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4068 cprev = cnow;
9fa1b3b1 4069 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4070 cnow = info->icount; /* atomic copy */
9fa1b3b1 4071 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 4072
2c7fea99
JS		 4073 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4074 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4075 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4076 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4077 }));
4078 break;
1da177e4 4079
02f1175c
JS		 4080 /*
4081 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4082 * Return: write counters to the user passed counter struct
4083 * NB: both 1->0 and 0->1 transitions are counted except for
4084 * RI where only 0->1 is counted.
4085 */
1da177e4 4086 case TIOCGICOUNT:
9fa1b3b1 4087 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4088 cnow = info->icount;
9fa1b3b1 4089 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 4090 p_cuser = argp;
4091 ret_val = put_user(cnow.cts, &p_cuser->cts);
4092 if (ret_val)
4093 return ret_val;
4094 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4095 if (ret_val)
4096 return ret_val;
4097 ret_val = put_user(cnow.rng, &p_cuser->rng);
4098 if (ret_val)
4099 return ret_val;
4100 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4101 if (ret_val)
4102 return ret_val;
4103 ret_val = put_user(cnow.rx, &p_cuser->rx);
4104 if (ret_val)
4105 return ret_val;
4106 ret_val = put_user(cnow.tx, &p_cuser->tx);
4107 if (ret_val)
4108 return ret_val;
4109 ret_val = put_user(cnow.frame, &p_cuser->frame);
4110 if (ret_val)
4111 return ret_val;
4112 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4113 if (ret_val)
4114 return ret_val;
4115 ret_val = put_user(cnow.parity, &p_cuser->parity);
4116 if (ret_val)
4117 return ret_val;
4118 ret_val = put_user(cnow.brk, &p_cuser->brk);
4119 if (ret_val)
4120 return ret_val;
4121 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4122 if (ret_val)
4123 return ret_val;
4124 ret_val = 0;
4125 break;
4126 default:
4127 ret_val = -ENOIOCTLCMD;
4128 }
1da177e4
LT		 4129
4130#ifdef CY_DEBUG_OTHER
21719191 4131 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4
LT		 4132#endif
4133
02f1175c
JS		 4134 return ret_val;
4135} /* cy_ioctl */
1da177e4
LT		 4136
4137/*
4138 * This routine allows the tty driver to be notified when
4139 * device's termios settings have changed. Note that a
4140 * well-designed tty driver should be prepared to accept the case
4141 * where old == NULL, and try to do something rational.
4142 */
02f1175c 4143static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4144{
cab9bdd1 4145 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4146
4147#ifdef CY_DEBUG_OTHER
21719191 4148 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4149#endif
4150
02f1175c
JS		 4151 if (tty->termios->c_cflag == old_termios->c_cflag &&
4152 (tty->termios->c_iflag & (IXON | IXANY)) ==
4153 (old_termios->c_iflag & (IXON | IXANY)))
4154 return;
4155 set_line_char(info);
4156
4157 if ((old_termios->c_cflag & CRTSCTS) &&
4158 !(tty->termios->c_cflag & CRTSCTS)) {
4159 tty->hw_stopped = 0;
4160 cy_start(tty);
4161 }
1da177e4 4162#if 0
02f1175c
JS		 4163 /*
4164 * No need to wake up processes in open wait, since they
4165 * sample the CLOCAL flag once, and don't recheck it.
4166 * XXX It's not clear whether the current behavior is correct
4167 * or not. Hence, this may change.....
4168 */
4169 if (!(old_termios->c_cflag & CLOCAL) &&
4170 (tty->termios->c_cflag & CLOCAL))
4171 wake_up_interruptible(&info->open_wait);
1da177e4 4172#endif
02f1175c 4173} /* cy_set_termios */
1da177e4
LT		 4174
4175/* This function is used to send a high-priority XON/XOFF character to
4176 the device.
4177*/
02f1175c 4178static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4179{
cab9bdd1 4180 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4181 struct cyclades_card *card;
4182 int channel;
1da177e4 4183
02f1175c 4184 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4185 return;
4186
02f1175c 4187 info->x_char = ch;
1da177e4
LT		 4188
4189 if (ch)
02f1175c 4190 cy_start(tty);
1da177e4
LT		 4191
4192 card = info->card;
875b206b 4193 channel = info->line - card->first_line;
1da177e4 4194
875b206b 4195 if (IS_CYC_Z(*card)) {
02f1175c 4196 if (ch == STOP_CHAR(tty))
875b206b 4197 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4198 else if (ch == START_CHAR(tty))
875b206b 4199 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4200 }
4201}
4202
4203/* This routine is called by the upper-layer tty layer to signal
4204 that incoming characters should be throttled because the input
4205 buffers are close to full.
4206 */
02f1175c 4207static void cy_throttle(struct tty_struct *tty)
1da177e4 4208{
cab9bdd1 4209 struct cyclades_port *info = tty->driver_data;
875b206b 4210 struct cyclades_card *card;
02f1175c
JS		 4211 unsigned long flags;
4212 void __iomem *base_addr;
875b206b 4213 int chip, channel, index;
1da177e4
LT		 4214
4215#ifdef CY_DEBUG_THROTTLE
02f1175c 4216 char buf[64];
1da177e4 4217
21719191 4218 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4219 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4220#endif
4221
02f1175c
JS		 4222 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4223 return;
4224 }
4225
4226 card = info->card;
4227
4228 if (I_IXOFF(tty)) {
875b206b 4229 if (!IS_CYC_Z(*card))
02f1175c
JS		 4230 cy_send_xchar(tty, STOP_CHAR(tty));
4231 else
4232 info->throttle = 1;
4233 }
1da177e4 4234
02f1175c 4235 if (tty->termios->c_cflag & CRTSCTS) {
875b206b
JS		 4236 channel = info->line - card->first_line;
4237 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4238 chip = channel >> 2;
4239 channel &= 0x03;
875b206b
JS		 4240 index = card->bus_index;
4241 base_addr = card->base_addr +
02f1175c
JS		 4242 (cy_chip_offset[chip] << index);
4243
9fa1b3b1 4244 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4245 cy_writeb(base_addr + (CyCAR << index),
4246 (u_char) channel);
4247 if (info->rtsdtr_inv) {
4248 cy_writeb(base_addr + (CyMSVR2 << index),
4249 ~CyDTR);
4250 } else {
4251 cy_writeb(base_addr + (CyMSVR1 << index),
4252 ~CyRTS);
4253 }
9fa1b3b1 4254 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4255 } else {
4256 info->throttle = 1;
4257 }
4258 }
02f1175c 4259} /* cy_throttle */
1da177e4
LT		 4260
4261/*
4262 * This routine notifies the tty driver that it should signal
4263 * that characters can now be sent to the tty without fear of
4264 * overrunning the input buffers of the line disciplines.
4265 */
02f1175c 4266static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4267{
cab9bdd1 4268 struct cyclades_port *info = tty->driver_data;
875b206b 4269 struct cyclades_card *card;
02f1175c
JS		 4270 unsigned long flags;
4271 void __iomem *base_addr;
875b206b 4272 int chip, channel, index;
1da177e4
LT		 4273
4274#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4275 char buf[64];
4276
21719191
JS		 4277 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4278 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
1da177e4
LT		 4279#endif
4280
02f1175c
JS		 4281 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4282 return;
4283 }
1da177e4 4284
02f1175c
JS		 4285 if (I_IXOFF(tty)) {
4286 if (info->x_char)
4287 info->x_char = 0;
4288 else
4289 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4290 }
1da177e4 4291
02f1175c
JS		 4292 if (tty->termios->c_cflag & CRTSCTS) {
4293 card = info->card;
875b206b
JS		 4294 channel = info->line - card->first_line;
4295 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4296 chip = channel >> 2;
4297 channel &= 0x03;
875b206b
JS		 4298 index = card->bus_index;
4299 base_addr = card->base_addr +
02f1175c
JS		 4300 (cy_chip_offset[chip] << index);
4301
9fa1b3b1 4302 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4303 cy_writeb(base_addr + (CyCAR << index),
4304 (u_char) channel);
4305 if (info->rtsdtr_inv) {
4306 cy_writeb(base_addr + (CyMSVR2 << index),
4307 CyDTR);
4308 } else {
4309 cy_writeb(base_addr + (CyMSVR1 << index),
4310 CyRTS);
4311 }
9fa1b3b1 4312 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4313 } else {
4314 info->throttle = 0;
4315 }
4316 }
02f1175c 4317} /* cy_unthrottle */
1da177e4
LT		 4318
4319/* cy_start and cy_stop provide software output flow control as a
4320 function of XON/XOFF, software CTS, and other such stuff.
4321*/
02f1175c 4322static void cy_stop(struct tty_struct *tty)
1da177e4 4323{
02f1175c 4324 struct cyclades_card *cinfo;
cab9bdd1 4325 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4326 void __iomem *base_addr;
4327 int chip, channel, index;
4328 unsigned long flags;
1da177e4
LT		 4329
4330#ifdef CY_DEBUG_OTHER
21719191 4331 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4332#endif
4333
02f1175c
JS		 4334 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4335 return;
1da177e4 4336
875b206b 4337 cinfo = info->card;
02f1175c
JS		 4338 channel = info->line - cinfo->first_line;
4339 if (!IS_CYC_Z(*cinfo)) {
4340 index = cinfo->bus_index;
4341 chip = channel >> 2;
4342 channel &= 0x03;
9fa1b3b1 4343 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4344
9fa1b3b1 4345 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4346 cy_writeb(base_addr + (CyCAR << index),
4347 (u_char)(channel & 0x0003)); /* index channel */
4348 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4349 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4350 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4351 } else {
096dcfce 4352 /* Nothing to do! */
02f1175c 4353 }
02f1175c 4354} /* cy_stop */
1da177e4 4355
02f1175c 4356static void cy_start(struct tty_struct *tty)
1da177e4 4357{
02f1175c 4358 struct cyclades_card *cinfo;
cab9bdd1 4359 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4360 void __iomem *base_addr;
4361 int chip, channel, index;
4362 unsigned long flags;
1da177e4
LT		 4363
4364#ifdef CY_DEBUG_OTHER
21719191 4365 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4366#endif
4367
02f1175c
JS		 4368 if (serial_paranoia_check(info, tty->name, "cy_start"))
4369 return;
1da177e4 4370
875b206b 4371 cinfo = info->card;
02f1175c
JS		 4372 channel = info->line - cinfo->first_line;
4373 index = cinfo->bus_index;
4374 if (!IS_CYC_Z(*cinfo)) {
4375 chip = channel >> 2;
4376 channel &= 0x03;
9fa1b3b1 4377 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4378
9fa1b3b1 4379 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4380 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4381 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4382 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4383 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4384 } else {
096dcfce 4385 /* Nothing to do! */
02f1175c 4386 }
02f1175c 4387} /* cy_start */
1da177e4 4388
02f1175c 4389static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4390{
cab9bdd1 4391 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4392 struct cyclades_card *card;
4393 int channel, retval;
02f1175c
JS		 4394 unsigned long flags;
4395
1da177e4 4396#ifdef CY_DEBUG_IO
21719191 4397 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1da177e4
LT		 4398#endif
4399
02f1175c
JS		 4400 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4401 return;
1da177e4 4402
02f1175c 4403 card = info->card;
875b206b 4404 channel = info->line - card->first_line;
1da177e4 4405
9fa1b3b1 4406 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 4407 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
9fa1b3b1 4408 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 4409
875b206b 4410 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
02f1175c 4411 buffers as well */
9fa1b3b1 4412 spin_lock_irqsave(&card->card_lock, flags);
875b206b 4413 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
02f1175c 4414 if (retval != 0) {
21719191
JS		 4415 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4416 "was %x\n", info->line, retval);
02f1175c 4417 }
9fa1b3b1 4418 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4419 }
4420 tty_wakeup(tty);
02f1175c 4421} /* cy_flush_buffer */
1da177e4
LT		 4422
4423/*
4424 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4425 */
02f1175c 4426static void cy_hangup(struct tty_struct *tty)
1da177e4 4427{
cab9bdd1 4428 struct cyclades_port *info = tty->driver_data;
02f1175c 4429
1da177e4 4430#ifdef CY_DEBUG_OTHER
21719191 4431 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4432#endif
4433
02f1175c
JS		 4434 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4435 return;
1da177e4 4436
02f1175c
JS		 4437 cy_flush_buffer(tty);
4438 shutdown(info);
4439 info->event = 0;
4440 info->count = 0;
1da177e4 4441#ifdef CY_DEBUG_COUNT
21719191
JS		 4442 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4443 current->pid);
1da177e4 4444#endif
02f1175c
JS		 4445 info->tty = NULL;
4446 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4447 wake_up_interruptible(&info->open_wait);
4448} /* cy_hangup */
1da177e4
LT		 4449
4450/*
4451 * ---------------------------------------------------------------------
4452 * cy_init() and friends
4453 *
4454 * cy_init() is called at boot-time to initialize the serial driver.
4455 * ---------------------------------------------------------------------
4456 */
4457
875b206b 4458static void __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4459{
4460 struct cyclades_port *info;
4461 u32 mailbox;
4462 unsigned int nports;
4463 unsigned short chip_number;
4464 int index, port;
4465
3046d50e
JS		 4466 spin_lock_init(&cinfo->card_lock);
4467
c2ad4c75 4468 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
0809e267
JS		 4469 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4470 cinfo->ctl_addr)->mail_box_0);
4471 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4472 cinfo->intr_enabled = 0;
4473 cinfo->nports = 0; /* Will be correctly set later, after
4474 Z FW is loaded */
3046d50e
JS		 4475 } else {
4476 index = cinfo->bus_index;
4477 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4478 }
4479
4480 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4481 port++) {
4482 info = &cy_port[port];
4483 memset(info, 0, sizeof(*info));
4484 info->magic = CYCLADES_MAGIC;
875b206b 4485 info->card = cinfo;
3046d50e
JS		 4486 info->line = port;
4487 info->flags = STD_COM_FLAGS;
4488 info->closing_wait = CLOSING_WAIT_DELAY;
4489 info->close_delay = 5 * HZ / 10;
4490
4491 INIT_WORK(&info->tqueue, do_softint);
4492 init_waitqueue_head(&info->open_wait);
4493 init_waitqueue_head(&info->close_wait);
2c7fea99 4494 init_completion(&info->shutdown_wait);
3046d50e
JS		 4495 init_waitqueue_head(&info->delta_msr_wait);
4496
4497 if (IS_CYC_Z(*cinfo)) {
0809e267 4498 info->type = PORT_STARTECH;
0809e267
JS		 4499 if (mailbox == ZO_V1)
4500 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4501 else
3046d50e 4502 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4503#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4504 setup_timer(&cyz_rx_full_timer[port],
4505 cyz_rx_restart, (unsigned long)info);
0809e267 4506#endif
3046d50e 4507 } else {
0809e267 4508 info->type = PORT_CIRRUS;
0809e267 4509 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4510 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4511 info->cor2 = CyETC;
4512 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4513
0809e267 4514 chip_number = (port - cinfo->first_line) / 4;
3046d50e 4515 if ((info->chip_rev = readb(cinfo->base_addr +
0809e267
JS		 4516 (cy_chip_offset[chip_number] <<
4517 index) + (CyGFRCR << index))) >=
4518 CD1400_REV_J) {
4519 /* It is a CD1400 rev. J or later */
4520 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4521 info->tco = baud_co_60[13]; /* Tx CO */
4522 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4523 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4524 info->rtsdtr_inv = 1;
4525 } else {
4526 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4527 info->tco = baud_co_25[13]; /* Tx CO */
4528 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4529 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4530 info->rtsdtr_inv = 0;
4531 }
3046d50e
JS		 4532 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4533 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4534 }
3046d50e 4535
0809e267 4536 }
3046d50e
JS		 4537
4538#ifndef CONFIG_CYZ_INTR
4539 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4540 mod_timer(&cyz_timerlist, jiffies + 1);
4541#ifdef CY_PCI_DEBUG
4542 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4543#endif
4544 }
4545#endif
0809e267
JS		 4546}
4547
1da177e4
LT		 4548/* initialize chips on Cyclom-Y card -- return number of valid
4549 chips (which is number of ports/4) */
31b4f0a1
JS		 4550static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4551 int index)
1da177e4 4552{
02f1175c
JS		 4553 unsigned int chip_number;
4554 void __iomem *base_addr;
4555
4556 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4557 /* Cy_HwReset is 0x1400 */
4558 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4559 /* Cy_ClrIntr is 0x1800 */
4560 udelay(500L);
4561
4562 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4563 base_addr =
4564 true_base_addr + (cy_chip_offset[chip_number] << index);
4565 mdelay(1);
db05c3b1 4566 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4567 /*************
4568 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4569 chip_number, (unsigned long)base_addr);
4570 *************/
4571 return chip_number;
4572 }
4573
4574 cy_writeb(base_addr + (CyGFRCR << index), 0);
4575 udelay(10L);
4576
4577 /* The Cyclom-16Y does not decode address bit 9 and therefore
4578 cannot distinguish between references to chip 0 and a non-
4579 existent chip 4. If the preceding clearing of the supposed
4580 chip 4 GFRCR register appears at chip 0, there is no chip 4
4581 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4582 */
db05c3b1 4583 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4584 (cy_chip_offset[0] << index) +
4585 (CyGFRCR << index)) == 0) {
4586 return chip_number;
4587 }
4588
4589 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4590 mdelay(1);
4591
db05c3b1 4592 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4593 /*
4594 printk(" chip #%d at %#6lx is not responding ",
4595 chip_number, (unsigned long)base_addr);
4596 printk("(GFRCR stayed 0)\n",
4597 */
4598 return chip_number;
4599 }
db05c3b1 4600 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4601 0x40) {
4602 /*
4603 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4604 "%#2x)\n",
4605 chip_number, (unsigned long)base_addr,
4606 base_addr[CyGFRCR<<index]);
4607 */
4608 return chip_number;
4609 }
4610 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4611 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4612 /* It is a CD1400 rev. J or later */
4613 /* Impossible to reach 5ms with this chip.
4614 Changed to 2ms instead (f = 500 Hz). */
4615 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4616 } else {
4617 /* f = 200 Hz */
4618 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4619 }
1da177e4 4620
02f1175c
JS		 4621 /*
4622 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4623 chip_number, (unsigned long)base_addr,
db05c3b1 4624 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4625 */
4626 }
4627 return chip_number;
4628} /* cyy_init_card */
1da177e4
LT		 4629
4630/*
4631 * ---------------------------------------------------------------------
4632 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4633 * sets global variables and return the number of ISA boards found.
4634 * ---------------------------------------------------------------------
4635 */
02f1175c 4636static int __init cy_detect_isa(void)
1da177e4
LT		 4637{
4638#ifdef CONFIG_ISA
02f1175c
JS		 4639 unsigned short cy_isa_irq, nboard;
4640 void __iomem *cy_isa_address;
4641 unsigned short i, j, cy_isa_nchan;
1da177e4 4642#ifdef MODULE
02f1175c 4643 int isparam = 0;
1da177e4
LT		 4644#endif
4645
02f1175c 4646 nboard = 0;
1da177e4
LT		 4647
4648#ifdef MODULE
4649 /* Check for module parameters */
02f1175c
JS		 4650 for (i = 0; i < NR_CARDS; i++) {
4651 if (maddr[i] || i) {
4652 isparam = 1;
4653 cy_isa_addresses[i] = maddr[i];
4654 }
4655 if (!maddr[i])
4656 break;
1da177e4
LT		 4657 }
4658#endif
4659
02f1175c
JS		 4660 /* scan the address table probing for Cyclom-Y/ISA boards */
4661 for (i = 0; i < NR_ISA_ADDRS; i++) {
4662 unsigned int isa_address = cy_isa_addresses[i];
4663 if (isa_address == 0x0000) {
096dcfce 4664 return nboard;
02f1175c 4665 }
1da177e4 4666
02f1175c 4667 /* probe for CD1400... */
1da177e4 4668 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4669 cy_isa_nchan = CyPORTS_PER_CHIP *
4670 cyy_init_card(cy_isa_address, 0);
4671 if (cy_isa_nchan == 0) {
4672 continue;
4673 }
1da177e4
LT		 4674#ifdef MODULE
4675 if (isparam && irq[i])
02f1175c 4676 cy_isa_irq = irq[i];
1da177e4
LT		 4677 else
4678#endif
02f1175c
JS		 4679 /* find out the board's irq by probing */
4680 cy_isa_irq = detect_isa_irq(cy_isa_address);
4681 if (cy_isa_irq == 0) {
21719191
JS		 4682 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4683 "IRQ could not be detected.\n",
02f1175c 4684 (unsigned long)cy_isa_address);
02f1175c
JS		 4685 continue;
4686 }
4687
4688 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4689 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4690 "more channels are available. Change NR_PORTS "
4691 "in cyclades.c and recompile kernel.\n",
02f1175c 4692 (unsigned long)cy_isa_address);
096dcfce 4693 return nboard;
02f1175c
JS		 4694 }
4695 /* fill the next cy_card structure available */
4696 for (j = 0; j < NR_CARDS; j++) {
4697 if (cy_card[j].base_addr == 0)
4698 break;
4699 }
4700 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4701 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4702 "more cards can be used. Change NR_CARDS in "
4703 "cyclades.c and recompile kernel.\n",
02f1175c 4704 (unsigned long)cy_isa_address);
096dcfce 4705 return nboard;
02f1175c
JS		 4706 }
4707
4708 /* allocate IRQ */
4709 if (request_irq(cy_isa_irq, cyy_interrupt,
4710 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4711 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4712 "could not allocate IRQ#%d.\n",
4713 (unsigned long)cy_isa_address, cy_isa_irq);
096dcfce 4714 return nboard;
02f1175c
JS		 4715 }
4716
4717 /* set cy_card */
4718 cy_card[j].base_addr = cy_isa_address;
4719 cy_card[j].ctl_addr = NULL;
4720 cy_card[j].irq = (int)cy_isa_irq;
4721 cy_card[j].bus_index = 0;
4722 cy_card[j].first_line = cy_next_channel;
4723 cy_card[j].num_chips = cy_isa_nchan / 4;
875b206b 4724 cy_init_card(&cy_card[j]);
02f1175c
JS		 4725 nboard++;
4726
21719191
JS		 4727 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4728 "%d channels starting from port %d\n",
02f1175c
JS		 4729 j + 1, (unsigned long)cy_isa_address,
4730 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4731 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4732
6ad1ccc1
JS		 4733 for (j = cy_next_channel;
4734 j < cy_next_channel + cy_isa_nchan; j++)
4735 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4736 cy_next_channel += cy_isa_nchan;
4737 }
096dcfce 4738 return nboard;
1da177e4 4739#else
096dcfce 4740 return 0;
02f1175c
JS		 4741#endif /* CONFIG_ISA */
4742} /* cy_detect_isa */
1da177e4 4743
58936d8d
JS		 4744#ifdef CONFIG_PCI
4745static void __devinit plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4746{
02f1175c 4747 /* Reset PLX */
db05c3b1 4748 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
02f1175c 4749 udelay(100L);
db05c3b1 4750 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
02f1175c
JS		 4751
4752 /* Reload Config. Registers from EEPROM */
db05c3b1 4753 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
02f1175c 4754 udelay(100L);
db05c3b1 4755 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4756}
4757
6d8248e8 4758static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
2b1da41f 4759 int cy_pci_irq, struct pci_dev *pdev)
d407c781 4760{
2b1da41f 4761 void __iomem *cy_pci_addr2;
d407c781
JS		 4762 unsigned int j;
4763 unsigned short cy_pci_nchan;
4764
2b1da41f
JS		 4765 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4766
d407c781 4767 readl(&cy_pci_addr0->mail_box_0);
21719191
JS		 4768 dev_dbg(&pdev->dev, "new Cyclades-Z board. FPGA not loaded\n");
4769
d407c781
JS		 4770 /* This must be the new Cyclades-Ze/PCI. */
4771 cy_pci_nchan = ZE_V1_NPORTS;
4772
4773 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
21719191 4774 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
d407c781 4775 "are available.\nChange NR_PORTS in cyclades.c "
21719191 4776 "and recompile kernel.\n");
d407c781
JS		 4777 return -EIO;
4778 }
4779
4780 /* fill the next cy_card structure available */
4781 for (j = 0; j < NR_CARDS; j++) {
4782 if (cy_card[j].base_addr == 0)
4783 break;
4784 }
4785 if (j == NR_CARDS) { /* no more cy_cards available */
21719191 4786 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
d407c781 4787 "cards can be used.\nChange NR_CARDS in "
21719191 4788 "cyclades.c and recompile kernel.\n");
d407c781
JS		 4789 return -EIO;
4790 }
4791#ifdef CONFIG_CYZ_INTR
4792 /* allocate IRQ only if board has an IRQ */
4793 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4794 if (request_irq(cy_pci_irq, cyz_interrupt,
4795 IRQF_SHARED, "Cyclades-Z",
4796 &cy_card[j])) {
21719191 4797 dev_err(&pdev->dev, "could not allocate IRQ.\n");
d407c781
JS		 4798 return -EIO;
4799 }
4800 }
4801#endif /* CONFIG_CYZ_INTR */
4802
4803 /* set cy_card */
d407c781
JS		 4804 cy_card[j].base_addr = cy_pci_addr2;
4805 cy_card[j].ctl_addr = cy_pci_addr0;
80fada50 4806 cy_card[j].irq = cy_pci_irq;
d407c781
JS		 4807 cy_card[j].bus_index = 1;
4808 cy_card[j].first_line = cy_next_channel;
4809 cy_card[j].num_chips = -1;
875b206b 4810 cy_init_card(&cy_card[j]);
38d09093 4811 pci_set_drvdata(pdev, &cy_card[j]);
d407c781 4812
21719191
JS		 4813 dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4814 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
d407c781 4815
6ad1ccc1
JS		 4816 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4817 tty_register_device(cy_serial_driver, j, &pdev->dev);
d407c781
JS		 4818 cy_next_channel += cy_pci_nchan;
4819
4820 return 0;
4821}
4822
58936d8d
JS		 4823static int __devinit cy_pci_probe(struct pci_dev *pdev,
4824 const struct pci_device_id *ent)
1da177e4 4825{
02f1175c 4826 unsigned char cyy_rev_id;
80fada50 4827 int cy_pci_irq;
6d8248e8 4828 __u32 mailbox;
02f1175c 4829 void __iomem *cy_pci_addr0, *cy_pci_addr2;
58936d8d
JS		 4830 unsigned int device_id;
4831 unsigned short j, cy_pci_nchan, plx_ver;
d407c781 4832 int retval;
02f1175c 4833
58936d8d
JS		 4834 retval = pci_enable_device(pdev);
4835 if (retval) {
4836 dev_err(&pdev->dev, "cannot enable device\n");
4837 return retval;
4838 }
1da177e4 4839
58936d8d
JS		 4840 /* read PCI configuration area */
4841 cy_pci_irq = pdev->irq;
58936d8d 4842 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
1da177e4 4843
58936d8d 4844 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4845
58936d8d
JS		 4846 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4847 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
21719191 4848 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
1da177e4 4849
58936d8d 4850 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
21719191 4851 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
58936d8d
JS		 4852 "set. Ignoring it...\n");
4853 pdev->resource[2].flags &= ~IORESOURCE_IO;
4854 }
1da177e4 4855
58936d8d
JS		 4856 /* Although we don't use this I/O region, we should
4857 request it from the kernel anyway, to avoid problems
4858 with other drivers accessing it. */
4859 retval = pci_request_regions(pdev, "Cyclom-Y");
4860 if (retval) {
21719191 4861 dev_err(&pdev->dev, "failed to reserve resources\n");
58936d8d
JS		 4862 return retval;
4863 }
4864#if defined(__alpha__)
4865 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
21719191
JS		 4866 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4867 "low addresses on Alpha systems.\n");
58936d8d
JS		 4868 return -EIO;
4869 }
1da177e4 4870#endif
58936d8d
JS		 4871 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4872 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
1da177e4 4873
21719191
JS		 4874 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4875 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4876
58936d8d
JS		 4877 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4878 cyy_init_card(cy_pci_addr2, 1));
4879 if (cy_pci_nchan == 0) {
21719191
JS		 4880 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4881 "Serial-Modules\n");
58936d8d
JS		 4882 return -EIO;
4883 }
4884 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
21719191
JS		 4885 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4886 "channels are available. Change NR_PORTS in "
4887 "cyclades.c and recompile kernel.\n");
58936d8d
JS		 4888 return -EIO;
4889 }
4890 /* fill the next cy_card structure available */
4891 for (j = 0; j < NR_CARDS; j++) {
4892 if (cy_card[j].base_addr == 0)
02f1175c 4893 break;
58936d8d
JS		 4894 }
4895 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4896 dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4897 "cards can be used. Change NR_CARDS in "
4898 "cyclades.c and recompile kernel.\n");
58936d8d
JS		 4899 return -EIO;
4900 }
02f1175c 4901
58936d8d
JS		 4902 /* allocate IRQ */
4903 retval = request_irq(cy_pci_irq, cyy_interrupt,
4904 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4905 if (retval) {
21719191 4906 dev_err(&pdev->dev, "could not allocate IRQ\n");
58936d8d
JS		 4907 return retval;
4908 }
02f1175c 4909
58936d8d 4910 /* set cy_card */
58936d8d
JS		 4911 cy_card[j].base_addr = cy_pci_addr2;
4912 cy_card[j].ctl_addr = cy_pci_addr0;
80fada50 4913 cy_card[j].irq = cy_pci_irq;
58936d8d
JS		 4914 cy_card[j].bus_index = 1;
4915 cy_card[j].first_line = cy_next_channel;
4916 cy_card[j].num_chips = cy_pci_nchan / 4;
875b206b 4917 cy_init_card(&cy_card[j]);
58936d8d 4918 pci_set_drvdata(pdev, &cy_card[j]);
02f1175c 4919
58936d8d
JS		 4920 /* enable interrupts in the PCI interface */
4921 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4922 switch (plx_ver) {
4923 case PLX_9050:
4924
4925 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
02f1175c 4926 break;
02f1175c 4927
58936d8d
JS		 4928 case PLX_9060:
4929 case PLX_9080:
4930 default: /* Old boards, use PLX_9060 */
02f1175c
JS		 4931
4932 plx_init(cy_pci_addr0, 0x6c);
58936d8d
JS		 4933 /* For some yet unknown reason, once the PLX9060 reloads
4934 the EEPROM, the IRQ is lost and, thus, we have to
4935 re-write it to the PCI config. registers.
4936 This will remain here until we find a permanent
4937 fix. */
02f1175c 4938 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
58936d8d 4939 cy_pci_irq);
02f1175c 4940
58936d8d
JS		 4941 cy_writew(cy_pci_addr0 + 0x68,
4942 readw(cy_pci_addr0 + 0x68) | 0x0900);
4943 break;
4944 }
02f1175c 4945
21719191
JS		 4946 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4947 "starting from port %d.\n", j + 1, cy_pci_nchan,
4948 cy_next_channel);
4949
6ad1ccc1
JS		 4950 for (j = cy_next_channel;
4951 j < cy_next_channel + cy_pci_nchan; j++)
4952 tty_register_device(cy_serial_driver, j, &pdev->dev);
1da177e4 4953
58936d8d
JS		 4954 cy_next_channel += cy_pci_nchan;
4955 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
21719191
JS		 4956 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4957 "low addresses\n");
58936d8d
JS		 4958 return -EIO;
4959 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
21719191
JS		 4960 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4961
58936d8d
JS		 4962 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4963
4964 /* Disable interrupts on the PLX before resetting it */
4965 cy_writew(cy_pci_addr0 + 0x68,
4966 readw(cy_pci_addr0 + 0x68) & ~0x0900);
4967
4968 plx_init(cy_pci_addr0, 0x6c);
4969 /* For some yet unknown reason, once the PLX9060 reloads
4970 the EEPROM, the IRQ is lost and, thus, we have to
4971 re-write it to the PCI config. registers.
4972 This will remain here until we find a permanent
4973 fix. */
80fada50 4974 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
02f1175c 4975
58936d8d
JS		 4976 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
4977 cy_pci_addr0)->mail_box_0);
4978
4979 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
21719191 4980 dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
58936d8d
JS		 4981 "set. Ignoring it...\n");
4982 pdev->resource[2].flags &= ~IORESOURCE_IO;
4983 }
4984
4985 /* Although we don't use this I/O region, we should
4986 request it from the kernel anyway, to avoid problems
4987 with other drivers accessing it. */
4988 retval = pci_request_regions(pdev, "Cyclades-Z");
4989 if (retval) {
21719191 4990 dev_err(&pdev->dev, "failed to reserve resources\n");
58936d8d
JS		 4991 return retval;
4992 }
4993
4994 if (mailbox == ZE_V1) {
6d8248e8 4995 retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
58936d8d
JS		 4996 return retval;
4997 } else {
4998 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
4999 }
1da177e4 5000
21719191
JS		 5001 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5002 "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
1da177e4 5003#ifdef CY_PCI_DEBUG
58936d8d
JS		 5004 if (mailbox == ZO_V1) {
5005 cy_writel(&((struct RUNTIME_9060 *)
5006 (cy_pci_addr0))->loc_addr_base,
5007 WIN_CREG);
21719191
JS		 5008 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5009 "ver %lx\n", (ulong)(0xff &
58936d8d 5010 readl(&((struct CUSTOM_REG *)
21719191
JS		 5011 cy_pci_addr2)->fpga_id)),
5012 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5013 cy_pci_addr2)->fpga_version)));
58936d8d 5014 cy_writel(&((struct RUNTIME_9060 *)
21719191 5015 cy_pci_addr0)->loc_addr_base, WIN_RAM);
58936d8d 5016 } else {
21719191
JS		 5017 dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5018 "board. FPGA not loaded\n");
58936d8d 5019 }
1da177e4 5020#endif
58936d8d
JS		 5021 /* The following clears the firmware id word. This
5022 ensures that the driver will not attempt to talk to
5023 the board until it has been properly initialized.
5024 */
5025 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5026 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5027
5028 /* This must be a Cyclades-8Zo/PCI. The extendable
5029 version will have a different device_id and will
5030 be allocated its maximum number of ports. */
5031 cy_pci_nchan = 8;
5032
5033 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
21719191
JS		 5034 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5035 "channels are available. Change NR_PORTS in "
5036 "cyclades.c and recompile kernel.\n");
58936d8d
JS		 5037 return -EIO;
5038 }
1da177e4 5039
58936d8d
JS		 5040 /* fill the next cy_card structure available */
5041 for (j = 0; j < NR_CARDS; j++) {
5042 if (cy_card[j].base_addr == 0)
5043 break;
5044 }
5045 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 5046 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5047 "more cards can be used. Change NR_CARDS in "
5048 "cyclades.c and recompile kernel.\n");
58936d8d
JS		 5049 return -EIO;
5050 }
02f1175c 5051#ifdef CONFIG_CYZ_INTR
58936d8d
JS		 5052 /* allocate IRQ only if board has an IRQ */
5053 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5054 retval = request_irq(cy_pci_irq, cyz_interrupt,
5055 IRQF_SHARED, "Cyclades-Z",
5056 &cy_card[j]);
5057 if (retval) {
21719191 5058 dev_err(&pdev->dev, "could not allocate IRQ\n");
58936d8d 5059 return retval;
02f1175c 5060 }
58936d8d 5061 }
02f1175c
JS		 5062#endif /* CONFIG_CYZ_INTR */
5063
58936d8d 5064 /* set cy_card */
58936d8d
JS		 5065 cy_card[j].base_addr = cy_pci_addr2;
5066 cy_card[j].ctl_addr = cy_pci_addr0;
80fada50 5067 cy_card[j].irq = cy_pci_irq;
58936d8d
JS		 5068 cy_card[j].bus_index = 1;
5069 cy_card[j].first_line = cy_next_channel;
5070 cy_card[j].num_chips = -1;
875b206b 5071 cy_init_card(&cy_card[j]);
58936d8d
JS		 5072 pci_set_drvdata(pdev, &cy_card[j]);
5073
21719191
JS		 5074 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5075 "starting from port %d.\n", j + 1, cy_pci_nchan,
5076 cy_next_channel);
58936d8d 5077
6ad1ccc1
JS		 5078 for (j = cy_next_channel;
5079 j < cy_next_channel + cy_pci_nchan; j++)
5080 tty_register_device(cy_serial_driver, j, &pdev->dev);
58936d8d
JS		 5081 cy_next_channel += cy_pci_nchan;
5082 }
5083
5084 return 0;
5085}
58936d8d 5086
6747cd93 5087static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 5088{
38d09093 5089 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5090 unsigned int i;
38d09093 5091
85c93fa9 5092 /* non-Z with old PLX */
c2ad4c75
JS		 5093 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5094 PLX_9050)
85c93fa9
JS		 5095 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5096 else
5097#ifndef CONFIG_CYZ_INTR
c2ad4c75 5098 if (!IS_CYC_Z(*cinfo))
85c93fa9
JS		 5099#endif
5100 cy_writew(cinfo->ctl_addr + 0x68,
5101 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5102
38d09093
JS		 5103 pci_iounmap(pdev, cinfo->base_addr);
5104 if (cinfo->ctl_addr)
5105 pci_iounmap(pdev, cinfo->ctl_addr);
5106 if (cinfo->irq
5107#ifndef CONFIG_CYZ_INTR
c2ad4c75 5108 && !IS_CYC_Z(*cinfo)
38d09093
JS		 5109#endif /* CONFIG_CYZ_INTR */
5110 )
5111 free_irq(cinfo->irq, cinfo);
5112 pci_release_regions(pdev);
5113
5114 cinfo->base_addr = NULL;
f3851e73
JS		 5115 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5116 cy_port[i].line = -1;
5117 cy_port[i].magic = -1;
5118 }
6ad1ccc1
JS		 5119 for (i = cinfo->first_line; i < cinfo->first_line +
5120 cinfo->nports; i++)
5121 tty_unregister_device(cy_serial_driver, i);
38d09093
JS		 5122}
5123
6747cd93
JS		 5124static struct pci_driver cy_pci_driver = {
5125 .name = "cyclades",
5126 .id_table = cy_pci_dev_id,
5127 .probe = cy_pci_probe,
5128 .remove = __devexit_p(cy_pci_remove)
5129};
5130#endif
5131
02f1175c 5132static int
1da177e4 5133cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5134 int *eof, void *data)
1da177e4 5135{
02f1175c
JS		 5136 struct cyclades_port *info;
5137 int i;
5138 int len = 0;
5139 off_t begin = 0;
5140 off_t pos = 0;
5141 int size;
5142 __u32 cur_jifs = jiffies;
5143
5144 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5145 "IdleIn Overruns Ldisc\n");
5146
5147 pos += size;
1da177e4 5148 len += size;
1da177e4 5149
02f1175c
JS		 5150 /* Output one line for each known port */
5151 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5152 info = &cy_port[i];
5153
5154 if (info->count)
5155 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5156 "%8lu %9lu %6ld\n", info->line,
096dcfce 5157 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5158 info->idle_stats.xmit_bytes,
096dcfce 5159 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5160 info->idle_stats.recv_bytes,
096dcfce 5161 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5162 info->idle_stats.overruns,
5163 (long)info->tty->ldisc.num);
5164 else
5165 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5166 "%8lu %9lu %6ld\n",
5167 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5168 len += size;
5169 pos = begin + len;
5170
5171 if (pos < offset) {
5172 len = 0;
5173 begin = pos;
5174 }
5175 if (pos > offset + length)
5176 goto done;
1da177e4 5177 }
02f1175c 5178 *eof = 1;
1da177e4 5179done:
02f1175c
JS		 5180 *start = buf + (offset - begin); /* Start of wanted data */
5181 len -= (offset - begin); /* Start slop */
5182 if (len > length)
5183 len = length; /* Ending slop */
5184 if (len < 0)
5185 len = 0;
5186 return len;
1da177e4
LT		 5187}
5188
5189/* The serial driver boot-time initialization code!
5190 Hardware I/O ports are mapped to character special devices on a
5191 first found, first allocated manner. That is, this code searches
5192 for Cyclom cards in the system. As each is found, it is probed
5193 to discover how many chips (and thus how many ports) are present.
5194 These ports are mapped to the tty ports 32 and upward in monotonic
5195 fashion. If an 8-port card is replaced with a 16-port card, the
5196 port mapping on a following card will shift.
5197
5198 This approach is different from what is used in the other serial
5199 device driver because the Cyclom is more properly a multiplexer,
5200 not just an aggregation of serial ports on one card.
5201
5202 If there are more cards with more ports than have been
5203 statically allocated above, a warning is printed and the
5204 extra ports are ignored.
5205 */
5206
b68e31d0 5207static const struct tty_operations cy_ops = {
02f1175c
JS		 5208 .open = cy_open,
5209 .close = cy_close,
5210 .write = cy_write,
5211 .put_char = cy_put_char,
5212 .flush_chars = cy_flush_chars,
5213 .write_room = cy_write_room,
5214 .chars_in_buffer = cy_chars_in_buffer,
5215 .flush_buffer = cy_flush_buffer,
5216 .ioctl = cy_ioctl,
5217 .throttle = cy_throttle,
5218 .unthrottle = cy_unthrottle,
5219 .set_termios = cy_set_termios,
5220 .stop = cy_stop,
5221 .start = cy_start,
5222 .hangup = cy_hangup,
5223 .break_ctl = cy_break,
5224 .wait_until_sent = cy_wait_until_sent,
5225 .read_proc = cyclades_get_proc_info,
5226 .tiocmget = cy_tiocmget,
5227 .tiocmset = cy_tiocmset,
1da177e4
LT		 5228};
5229
02f1175c 5230static int __init cy_init(void)
1da177e4 5231{
14a55a67 5232 unsigned int i, nboards;
9dacf3b2 5233 int retval = -ENOMEM;
02f1175c
JS		 5234
5235 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5236 if (!cy_serial_driver)
9dacf3b2 5237 goto err;
21719191
JS		 5238
5239 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5240 __DATE__, __TIME__);
02f1175c
JS		 5241
5242 /* Initialize the tty_driver structure */
5243
5244 cy_serial_driver->owner = THIS_MODULE;
5245 cy_serial_driver->driver_name = "cyclades";
5246 cy_serial_driver->name = "ttyC";
5247 cy_serial_driver->major = CYCLADES_MAJOR;
5248 cy_serial_driver->minor_start = 0;
5249 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5250 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5251 cy_serial_driver->init_termios = tty_std_termios;
5252 cy_serial_driver->init_termios.c_cflag =
5253 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5254 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5255 tty_set_operations(cy_serial_driver, &cy_ops);
5256
9dacf3b2
JS		 5257 retval = tty_register_driver(cy_serial_driver);
5258 if (retval) {
5259 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5260 goto err_frtty;
5261 }
02f1175c 5262
f3851e73
JS		 5263 for (i = 0; i < NR_PORTS; i++) {
5264 cy_port[i].line = -1;
5265 cy_port[i].magic = -1;
5266 }
5267
02f1175c
JS		 5268 /* the code below is responsible to find the boards. Each different
5269 type of board has its own detection routine. If a board is found,
5270 the next cy_card structure available is set by the detection
5271 routine. These functions are responsible for checking the
5272 availability of cy_card and cy_port data structures and updating
5273 the cy_next_channel. */
5274
5275 /* look for isa boards */
14a55a67 5276 nboards = cy_detect_isa();
02f1175c 5277
6747cd93 5278#ifdef CONFIG_PCI
02f1175c 5279 /* look for pci boards */
6747cd93
JS		 5280 retval = pci_register_driver(&cy_pci_driver);
5281 if (retval && !nboards)
9dacf3b2 5282 goto err_unr;
6747cd93 5283#endif
9dacf3b2
JS		 5284
5285 return 0;
5286err_unr:
5287 tty_unregister_driver(cy_serial_driver);
5288err_frtty:
5289 put_tty_driver(cy_serial_driver);
5290err:
5291 return retval;
02f1175c 5292} /* cy_init */
1da177e4 5293
02f1175c 5294static void __exit cy_cleanup_module(void)
1da177e4 5295{
02f1175c 5296 int i, e1;
1da177e4
LT		 5297
5298#ifndef CONFIG_CYZ_INTR
b7050906 5299 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5300#endif /* CONFIG_CYZ_INTR */
5301
02f1175c 5302 if ((e1 = tty_unregister_driver(cy_serial_driver)))
21719191
JS		 5303 printk(KERN_ERR "failed to unregister Cyclades serial "
5304 "driver(%d)\n", e1);
1da177e4 5305
02f1175c 5306 put_tty_driver(cy_serial_driver);
1da177e4 5307
6747cd93
JS		 5308#ifdef CONFIG_PCI
5309 pci_unregister_driver(&cy_pci_driver);
5310#endif
5311
02f1175c
JS		 5312 for (i = 0; i < NR_CARDS; i++) {
5313 if (cy_card[i].base_addr) {
85c93fa9
JS		 5314 /* clear interrupt */
5315 cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
02f1175c
JS		 5316 iounmap(cy_card[i].base_addr);
5317 if (cy_card[i].ctl_addr)
5318 iounmap(cy_card[i].ctl_addr);
5319 if (cy_card[i].irq
1da177e4 5320#ifndef CONFIG_CYZ_INTR
c2ad4c75 5321 && !IS_CYC_Z(cy_card[i])
1da177e4 5322#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5323 )
5324 free_irq(cy_card[i].irq, &cy_card[i]);
6ad1ccc1
JS		 5325 for (e1 = cy_card[i].first_line;
5326 e1 < cy_card[i].first_line +
5327 cy_card[i].nports; e1++)
5328 tty_unregister_device(cy_serial_driver, e1);
02f1175c
JS		 5329 }
5330 }
1da177e4
LT		 5331} /* cy_cleanup_module */
5332
5333module_init(cy_init);
5334module_exit(cy_cleanup_module);
5335
5336MODULE_LICENSE("GPL");
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