projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Char: cyclades, tty_register_device separately for each device
[linux-2.6-block.git] / drivers / char / cyclades.c
CommitLineData
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
656#define CY_LOCK(info,flags) \
657 do { \
658 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
659 } while (0)
02f1175c 660
1da177e4
LT		 661#define CY_UNLOCK(info,flags) \
662 do { \
663 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
664 } while (0)
665
1da177e4
LT		 666#include <linux/kernel.h>
667#include <linux/pci.h>
668
669#include <linux/stat.h>
670#include <linux/proc_fs.h>
671
02f1175c
JS		 672static void cy_throttle(struct tty_struct *tty);
673static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 674
675#define IS_CYC_Z(card) ((card).num_chips == -1)
676
677#define Z_FPGA_CHECK(card) \
db05c3b1 678 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 680
db05c3b1 681#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
db05c3b1 684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 685 ((card).base_addr+ID_ADDRESS))->signature)))
686
687#ifndef SERIAL_XMIT_SIZE
688#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
689#endif
690#define WAKEUP_CHARS 256
691
692#define STD_COM_FLAGS (0)
693
1da177e4
LT		 694static struct tty_driver *cy_serial_driver;
695
696#ifdef CONFIG_ISA
697/* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
704*/
705
706static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 707 0xD0000,
708 0xD2000,
709 0xD4000,
710 0xD6000,
711 0xD8000,
712 0xDA000,
713 0xDC000,
714 0xDE000,
715 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 716};
02f1175c 717
fe971071 718#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 719
720#ifdef MODULE
721static long maddr[NR_CARDS] = { 0, };
02f1175c 722static int irq[NR_CARDS] = { 0, };
1da177e4
LT		 723
724module_param_array(maddr, long, NULL, 0);
725module_param_array(irq, int, NULL, 0);
726#endif
727
02f1175c 728#endif /* CONFIG_ISA */
1da177e4
LT		 729
730/* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
732*/
733static struct cyclades_card cy_card[NR_CARDS];
734
735/* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
737*/
738static struct cyclades_port cy_port[NR_PORTS];
739
02f1175c 740static int cy_next_channel; /* next minor available */
1da177e4 741
1da177e4
LT		 742/*
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
748 * HI VHI
749 * 20
750 */
751static int baud_table[] = {
02f1175c
JS		 752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
754 230400, 0
755};
756
757static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
762};
763
764static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
767};
768
769static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
774 0x00
775};
776
777static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
780 0x21
781};
782
783static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
786 0x07
787};
1da177e4
LT		 788
789/*
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
797 * cables.
798 */
799
02f1175c
JS		 800static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
803 0x0a
804};
1da177e4
LT		 805
806/* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
808 */
02f1175c
JS		 809static int cy_chip_offset[] = { 0x0000,
810 0x0400,
811 0x0800,
812 0x0C00,
813 0x0200,
814 0x0600,
815 0x0A00,
816 0x0E00
817};
1da177e4
LT		 818
819/* PCI related definitions */
820
1da177e4 821#ifdef CONFIG_PCI
893de2df
JS		 822static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
823 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
824 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
825 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
831 { } /* end of table */
02f1175c 832};
893de2df 833MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 834#endif
835
836static void cy_start(struct tty_struct *);
837static void set_line_char(struct cyclades_port *);
1a86b5e3 838static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 839#ifdef CONFIG_ISA
840static unsigned detect_isa_irq(void __iomem *);
02f1175c 841#endif /* CONFIG_ISA */
1da177e4 842
02f1175c 843static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 844
845#ifndef CONFIG_CYZ_INTR
846static void cyz_poll(unsigned long);
847
848/* The Cyclades-Z polling cycle is defined by this variable */
849static long cyz_polling_cycle = CZ_DEF_POLL;
850
8d06afab 851static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 852
02f1175c 853#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 854static void cyz_rx_restart(unsigned long);
855static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 856#endif /* CONFIG_CYZ_INTR */
1da177e4 857
02f1175c
JS		 858static inline int serial_paranoia_check(struct cyclades_port *info,
859 char *name, const char *routine)
1da177e4
LT		 860{
861#ifdef SERIAL_PARANOIA_CHECK
02f1175c 862 if (!info) {
096dcfce
JS		 863 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
864 name, routine);
02f1175c
JS		 865 return 1;
866 }
867
868 if ((long)info < (long)(&cy_port[0]) ||
869 (long)(&cy_port[NR_PORTS]) < (long)info) {
096dcfce
JS		 870 printk("cyc Warning: cyclades_port out of range for (%s) in "
871 "%s\n", name, routine);
02f1175c
JS		 872 return 1;
873 }
874
875 if (info->magic != CYCLADES_MAGIC) {
096dcfce
JS		 876 printk("cyc Warning: bad magic number for serial struct (%s) "
877 "in %s\n", name, routine);
02f1175c
JS		 878 return 1;
879 }
1da177e4 880#endif
02f1175c
JS		 881 return 0;
882} /* serial_paranoia_check */
1da177e4
LT		 883
884/*
885 * This routine is used by the interrupt handler to schedule
886 * processing in the software interrupt portion of the driver
887 * (also known as the "bottom half"). This can be called any
888 * number of times for any channel without harm.
889 */
02f1175c 890static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 891{
02f1175c
JS		 892 info->event |= 1 << event; /* remember what kind of event and who */
893 schedule_work(&info->tqueue);
894} /* cy_sched_event */
1da177e4
LT		 895
896/*
897 * This routine is used to handle the "bottom half" processing for the
898 * serial driver, known also the "software interrupt" processing.
899 * This processing is done at the kernel interrupt level, after the
900 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
901 * is where time-consuming activities which can not be done in the
902 * interrupt driver proper are done; the interrupt driver schedules
903 * them using cy_sched_event(), and they get done here.
904 *
905 * This is done through one level of indirection--the task queue.
906 * When a hardware interrupt service routine wants service by the
907 * driver's bottom half, it enqueues the appropriate tq_struct (one
908 * per port) to the keventd work queue and sets a request flag
909 * that the work queue be processed.
910 *
911 * Although this may seem unwieldy, it gives the system a way to
912 * pass an argument (in this case the pointer to the cyclades_port
913 * structure) to the bottom half of the driver. Previous kernels
914 * had to poll every port to see if that port needed servicing.
915 */
916static void
c4028958 917do_softint(struct work_struct *work)
1da177e4 918{
c4028958
DH		 919 struct cyclades_port *info =
920 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 921 struct tty_struct *tty;
922
923 tty = info->tty;
924 if (!tty)
925 return;
926
927 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
928 tty_hangup(info->tty);
929 wake_up_interruptible(&info->open_wait);
930 info->flags &= ~ASYNC_NORMAL_ACTIVE;
931 }
932 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
933 wake_up_interruptible(&info->open_wait);
1da177e4 934#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 935 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
936 if (cyz_rx_full_timer[info->line].function == NULL) {
937 cyz_rx_full_timer[info->line].expires = jiffies + 1;
938 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
939 cyz_rx_full_timer[info->line].data =
940 (unsigned long)info;
941 add_timer(&cyz_rx_full_timer[info->line]);
942 }
1da177e4 943 }
1da177e4 944#endif
02f1175c
JS		 945 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
946 wake_up_interruptible(&info->delta_msr_wait);
947 tty_wakeup(tty);
1da177e4 948#ifdef Z_WAKE
02f1175c
JS		 949 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
950 wake_up_interruptible(&info->shutdown_wait);
1da177e4
LT		 951#endif
952} /* do_softint */
953
954
955/***********************************************************/
956/********* Start of block of Cyclom-Y specific code ********/
957
958/* This routine waits up to 1000 micro-seconds for the previous
959 command to the Cirrus chip to complete and then issues the
960 new command. An error is returned if the previous command
961 didn't finish within the time limit.
962
963 This function is only called from inside spinlock-protected code.
964 */
02f1175c 965static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 966{
ad39c300 967 unsigned int i;
1da177e4 968
02f1175c
JS		 969 /* Check to see that the previous command has completed */
970 for (i = 0; i < 100; i++) {
db05c3b1 971 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 972 break;
973 }
974 udelay(10L);
1da177e4 975 }
02f1175c
JS		 976 /* if the CCR never cleared, the previous command
977 didn't finish within the "reasonable time" */
978 if (i == 100)
096dcfce 979 return -1;
1da177e4 980
02f1175c
JS		 981 /* Issue the new command */
982 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 983
096dcfce 984 return 0;
02f1175c 985} /* cyy_issue_cmd */
1da177e4
LT		 986
987#ifdef CONFIG_ISA
988/* ISA interrupt detection code */
02f1175c 989static unsigned detect_isa_irq(void __iomem * address)
1da177e4 990{
02f1175c
JS		 991 int irq;
992 unsigned long irqs, flags;
993 int save_xir, save_car;
994 int index = 0; /* IRQ probing is only for ISA */
995
996 /* forget possible initially masked and pending IRQ */
997 irq = probe_irq_off(probe_irq_on());
998
999 /* Clear interrupts on the board first */
1000 cy_writeb(address + (Cy_ClrIntr << index), 0);
1001 /* Cy_ClrIntr is 0x1800 */
1002
1003 irqs = probe_irq_on();
1004 /* Wait ... */
1005 udelay(5000L);
1006
1007 /* Enable the Tx interrupts on the CD1400 */
1008 local_irq_save(flags);
1009 cy_writeb(address + (CyCAR << index), 0);
1010 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1011
1012 cy_writeb(address + (CyCAR << index), 0);
1013 cy_writeb(address + (CySRER << index),
db05c3b1 1014 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 1015 local_irq_restore(flags);
1016
1017 /* Wait ... */
1018 udelay(5000L);
1019
1020 /* Check which interrupt is in use */
1021 irq = probe_irq_off(irqs);
1022
1023 /* Clean up */
db05c3b1
JS		 1024 save_xir = (u_char) readb(address + (CyTIR << index));
1025 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 1026 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1027 cy_writeb(address + (CySRER << index),
db05c3b1 1028 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 1029 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1030 cy_writeb(address + (CyCAR << index), (save_car));
1031 cy_writeb(address + (Cy_ClrIntr << index), 0);
1032 /* Cy_ClrIntr is 0x1800 */
1033
1034 return (irq > 0) ? irq : 0;
1da177e4 1035}
02f1175c 1036#endif /* CONFIG_ISA */
1da177e4 1037
e941027f 1038static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1039 void __iomem * base_addr, int status, int index)
e941027f
JS		 1040{
1041 struct cyclades_port *info;
1042 struct tty_struct *tty;
ad39c300 1043 int char_count;
e941027f
JS		 1044 int i, j, len, mdm_change, mdm_status, outch;
1045 int save_xir, channel, save_car;
1046 char data;
1047
02f1175c 1048 if (status & CySRReceive) { /* reception interrupt */
e941027f 1049#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1050 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
e941027f 1051#endif
02f1175c
JS		 1052 /* determine the channel & change to that context */
1053 spin_lock(&cinfo->card_lock);
db05c3b1 1054 save_xir = (u_char) readb(base_addr + (CyRIR << index));
02f1175c
JS		 1055 channel = (u_short) (save_xir & CyIRChannel);
1056 i = channel + chip * 4 + cinfo->first_line;
1057 info = &cy_port[i];
1058 info->last_active = jiffies;
db05c3b1 1059 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1060 cy_writeb(base_addr + (CyCAR << index), save_xir);
1061
1062 /* if there is nowhere to put the data, discard it */
1063 if (info->tty == 0) {
db05c3b1 1064 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1065 CyIVRMask);
1066 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1067 data = readb(base_addr + (CyRDSR << index));
02f1175c 1068 } else { /* normal character reception */
db05c3b1 1069 char_count = readb(base_addr +
02f1175c
JS		 1070 (CyRDCR << index));
1071 while (char_count--) {
db05c3b1 1072 data = readb(base_addr +
02f1175c 1073 (CyRDSR << index));
e941027f 1074 }
e941027f 1075 }
02f1175c
JS		 1076 } else { /* there is an open port for this data */
1077 tty = info->tty;
db05c3b1 1078 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1079 CyIVRMask);
1080 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1081 data = readb(base_addr + (CyRDSR << index));
02f1175c
JS		 1082
1083 /* For statistics only */
1084 if (data & CyBREAK)
1085 info->icount.brk++;
1086 else if (data & CyFRAME)
1087 info->icount.frame++;
1088 else if (data & CyPARITY)
1089 info->icount.parity++;
1090 else if (data & CyOVERRUN)
1091 info->icount.overrun++;
1092
1093 if (data & info->ignore_status_mask) {
1094 info->icount.rx++;
1095 return;
1096 }
1097 if (tty_buffer_request_room(tty, 1)) {
1098 if (data & info->read_status_mask) {
1099 if (data & CyBREAK) {
1100 tty_insert_flip_char(
1101 tty,
db05c3b1 1102 readb(
02f1175c
JS		 1103 base_addr +
1104 (CyRDSR <<
1105 index)),
1106 TTY_BREAK);
1107 info->icount.rx++;
1108 if (info->flags &
1109 ASYNC_SAK) {
1110 do_SAK(tty);
1111 }
1112 } else if (data & CyFRAME) {
1113 tty_insert_flip_char(
1114 tty,
db05c3b1 1115 readb(
02f1175c
JS		 1116 base_addr +
1117 (CyRDSR <<
1118 index)),
1119 TTY_FRAME);
1120 info->icount.rx++;
1121 info->idle_stats.
1122 frame_errs++;
1123 } else if (data & CyPARITY) {
1124 /* Pieces of seven... */
1125 tty_insert_flip_char(
1126 tty,
db05c3b1 1127 readb(
02f1175c
JS		 1128 base_addr +
1129 (CyRDSR <<
1130 index)),
1131 TTY_PARITY);
1132 info->icount.rx++;
1133 info->idle_stats.
1134 parity_errs++;
1135 } else if (data & CyOVERRUN) {
1136 tty_insert_flip_char(
1137 tty, 0,
1138 TTY_OVERRUN);
1139 info->icount.rx++;
1140 /* If the flip buffer itself is
1141 overflowing, we still lose
1142 the next incoming character.
1143 */
1144 tty_insert_flip_char(
1145 tty,
db05c3b1 1146 readb(
02f1175c
JS		 1147 base_addr +
1148 (CyRDSR <<
1149 index)),
1150 TTY_FRAME);
1151 info->icount.rx++;
1152 info->idle_stats.
1153 overruns++;
1154 /* These two conditions may imply */
1155 /* a normal read should be done. */
1156 /* }else if(data & CyTIMEOUT){ */
1157 /* }else if(data & CySPECHAR){ */
1158 } else {
1159 tty_insert_flip_char(
1160 tty, 0,
1161 TTY_NORMAL);
1162 info->icount.rx++;
1163 }
1164 } else {
1165 tty_insert_flip_char(tty, 0,
1166 TTY_NORMAL);
1167 info->icount.rx++;
1168 }
1169 } else {
1170 /* there was a software buffer
1171 overrun and nothing could be
1172 done about it!!! */
1173 info->icount.buf_overrun++;
1174 info->idle_stats.overruns++;
1175 }
1176 } else { /* normal character reception */
1177 /* load # chars available from the chip */
db05c3b1 1178 char_count = readb(base_addr +
02f1175c 1179 (CyRDCR << index));
e941027f
JS		 1180
1181#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1182 ++info->mon.int_count;
1183 info->mon.char_count += char_count;
1184 if (char_count > info->mon.char_max)
1185 info->mon.char_max = char_count;
1186 info->mon.char_last = char_count;
e941027f 1187#endif
02f1175c
JS		 1188 len = tty_buffer_request_room(tty, char_count);
1189 while (len--) {
db05c3b1 1190 data = readb(base_addr +
02f1175c
JS		 1191 (CyRDSR << index));
1192 tty_insert_flip_char(tty, data,
1193 TTY_NORMAL);
1194 info->idle_stats.recv_bytes++;
1195 info->icount.rx++;
e941027f 1196#ifdef CY_16Y_HACK
02f1175c 1197 udelay(10L);
e941027f 1198#endif
02f1175c
JS		 1199 }
1200 info->idle_stats.recv_idle = jiffies;
1201 }
1202 tty_schedule_flip(tty);
e941027f 1203 }
02f1175c
JS		 1204 /* end of service */
1205 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1206 cy_writeb(base_addr + (CyCAR << index), (save_car));
1207 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1208 }
1209
02f1175c
JS		 1210 if (status & CySRTransmit) { /* transmission interrupt */
1211 /* Since we only get here when the transmit buffer
1212 is empty, we know we can always stuff a dozen
1213 characters. */
e941027f 1214#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1215 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
e941027f
JS		 1216#endif
1217
02f1175c
JS		 1218 /* determine the channel & change to that context */
1219 spin_lock(&cinfo->card_lock);
db05c3b1 1220 save_xir = (u_char) readb(base_addr + (CyTIR << index));
02f1175c
JS		 1221 channel = (u_short) (save_xir & CyIRChannel);
1222 i = channel + chip * 4 + cinfo->first_line;
db05c3b1 1223 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1224 cy_writeb(base_addr + (CyCAR << index), save_xir);
1225
1226 /* validate the port# (as configured and open) */
1227 if ((i < 0) || (NR_PORTS <= i)) {
1228 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1229 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1230 ~CyTxRdy);
1231 goto txend;
e941027f 1232 }
02f1175c
JS		 1233 info = &cy_port[i];
1234 info->last_active = jiffies;
1235 if (info->tty == 0) {
1236 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1237 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1238 ~CyTxRdy);
1239 goto txdone;
e941027f 1240 }
02f1175c
JS		 1241
1242 /* load the on-chip space for outbound data */
1243 char_count = info->xmit_fifo_size;
1244
1245 if (info->x_char) { /* send special char */
1246 outch = info->x_char;
1247 cy_writeb(base_addr + (CyTDR << index), outch);
1248 char_count--;
1249 info->icount.tx++;
1250 info->x_char = 0;
e941027f 1251 }
02f1175c
JS		 1252
1253 if (info->breakon || info->breakoff) {
1254 if (info->breakon) {
1255 cy_writeb(base_addr + (CyTDR << index), 0);
1256 cy_writeb(base_addr + (CyTDR << index), 0x81);
1257 info->breakon = 0;
1258 char_count -= 2;
1259 }
1260 if (info->breakoff) {
1261 cy_writeb(base_addr + (CyTDR << index), 0);
1262 cy_writeb(base_addr + (CyTDR << index), 0x83);
1263 info->breakoff = 0;
1264 char_count -= 2;
1265 }
e941027f 1266 }
02f1175c
JS		 1267
1268 while (char_count-- > 0) {
1269 if (!info->xmit_cnt) {
db05c3b1 1270 if (readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1271 CyTxMpty) {
1272 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1273 readb(base_addr +
02f1175c
JS		 1274 (CySRER << index)) &
1275 ~CyTxMpty);
1276 } else {
1277 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1278 (readb(base_addr +
02f1175c
JS		 1279 (CySRER << index)) &
1280 ~CyTxRdy) | CyTxMpty);
1281 }
1282 goto txdone;
1283 }
1284 if (info->xmit_buf == 0) {
1285 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1286 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1287 ~CyTxRdy);
1288 goto txdone;
1289 }
1290 if (info->tty->stopped || info->tty->hw_stopped) {
1291 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1292 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1293 ~CyTxRdy);
1294 goto txdone;
1295 }
1296 /* Because the Embedded Transmit Commands have
1297 been enabled, we must check to see if the
1298 escape character, NULL, is being sent. If it
1299 is, we must ensure that there is room for it
1300 to be doubled in the output stream. Therefore
1301 we no longer advance the pointer when the
1302 character is fetched, but rather wait until
1303 after the check for a NULL output character.
1304 This is necessary because there may not be
1305 room for the two chars needed to send a NULL.)
1306 */
1307 outch = info->xmit_buf[info->xmit_tail];
1308 if (outch) {
1309 info->xmit_cnt--;
1310 info->xmit_tail = (info->xmit_tail + 1) &
1311 (SERIAL_XMIT_SIZE - 1);
1312 cy_writeb(base_addr + (CyTDR << index), outch);
1313 info->icount.tx++;
1314 } else {
1315 if (char_count > 1) {
1316 info->xmit_cnt--;
1317 info->xmit_tail = (info->xmit_tail + 1)&
1318 (SERIAL_XMIT_SIZE - 1);
1319 cy_writeb(base_addr + (CyTDR << index),
1320 outch);
1321 cy_writeb(base_addr + (CyTDR << index),
1322 0);
1323 info->icount.tx++;
1324 char_count--;
1325 } else {
1326 }
1327 }
e941027f 1328 }
e941027f
JS		 1329
1330txdone:
02f1175c
JS		 1331 if (info->xmit_cnt < WAKEUP_CHARS) {
1332 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1333 }
e941027f 1334txend:
02f1175c
JS		 1335 /* end of service */
1336 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1337 cy_writeb(base_addr + (CyCAR << index), (save_car));
1338 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1339 }
1340
02f1175c 1341 if (status & CySRModem) { /* modem interrupt */
e941027f 1342
02f1175c
JS		 1343 /* determine the channel & change to that context */
1344 spin_lock(&cinfo->card_lock);
db05c3b1 1345 save_xir = (u_char) readb(base_addr + (CyMIR << index));
02f1175c
JS		 1346 channel = (u_short) (save_xir & CyIRChannel);
1347 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1348 info->last_active = jiffies;
db05c3b1 1349 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1350 cy_writeb(base_addr + (CyCAR << index), save_xir);
1351
db05c3b1
JS		 1352 mdm_change = readb(base_addr + (CyMISR << index));
1353 mdm_status = readb(base_addr + (CyMSVR1 << index));
02f1175c
JS		 1354
1355 if (info->tty == 0) { /* no place for data, ignore it */
1356 ;
1357 } else {
1358 if (mdm_change & CyANY_DELTA) {
1359 /* For statistics only */
1360 if (mdm_change & CyDCD)
1361 info->icount.dcd++;
1362 if (mdm_change & CyCTS)
1363 info->icount.cts++;
1364 if (mdm_change & CyDSR)
1365 info->icount.dsr++;
1366 if (mdm_change & CyRI)
1367 info->icount.rng++;
1368
1369 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1370 }
02f1175c
JS		 1371
1372 if ((mdm_change & CyDCD) &&
1373 (info->flags & ASYNC_CHECK_CD)) {
1374 if (mdm_status & CyDCD) {
1375 cy_sched_event(info,
1376 Cy_EVENT_OPEN_WAKEUP);
1377 } else {
1378 cy_sched_event(info, Cy_EVENT_HANGUP);
1379 }
1380 }
1381 if ((mdm_change & CyCTS) &&
1382 (info->flags & ASYNC_CTS_FLOW)) {
1383 if (info->tty->hw_stopped) {
1384 if (mdm_status & CyCTS) {
1385 /* cy_start isn't used
1386 because... !!! */
1387 info->tty->hw_stopped = 0;
1388 cy_writeb(base_addr +
1389 (CySRER << index),
db05c3b1 1390 readb(base_addr +
02f1175c
JS		 1391 (CySRER <<
1392 index))|
1393 CyTxRdy);
1394 cy_sched_event(info,
1395 Cy_EVENT_WRITE_WAKEUP);
1396 }
1397 } else {
1398 if (!(mdm_status & CyCTS)) {
1399 /* cy_stop isn't used
1400 because ... !!! */
1401 info->tty->hw_stopped = 1;
1402 cy_writeb(base_addr +
1403 (CySRER << index),
db05c3b1 1404 readb(base_addr +
02f1175c
JS		 1405 (CySRER <<
1406 index)) &
1407 ~CyTxRdy);
1408 }
1409 }
1410 }
1411 if (mdm_change & CyDSR) {
1412 }
1413 if (mdm_change & CyRI) {
e941027f 1414 }
e941027f 1415 }
02f1175c
JS		 1416 /* end of service */
1417 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1418 cy_writeb(base_addr + (CyCAR << index), save_car);
1419 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1420 }
1421}
1422
1da177e4
LT		 1423/* The real interrupt service routine is called
1424 whenever the card wants its hand held--chars
1425 received, out buffer empty, modem change, etc.
1426 */
02f1175c 1427static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1428{
02f1175c
JS		 1429 int status;
1430 struct cyclades_card *cinfo;
1431 void __iomem *base_addr, *card_base_addr;
1432 int chip;
1433 int index;
1434 int too_many;
1435 int had_work;
1436
1437 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1438#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1439 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1440#endif
02f1175c
JS		 1441 return IRQ_NONE; /* spurious interrupt */
1442 }
1443
1444 card_base_addr = cinfo->base_addr;
1445 index = cinfo->bus_index;
1446
1447 /* This loop checks all chips in the card. Make a note whenever
1448 _any_ chip had some work to do, as this is considered an
1449 indication that there will be more to do. Only when no chip
1450 has any work does this outermost loop exit.
1451 */
1452 do {
1453 had_work = 0;
1454 for (chip = 0; chip < cinfo->num_chips; chip++) {
1455 base_addr = cinfo->base_addr +
1456 (cy_chip_offset[chip] << index);
1457 too_many = 0;
db05c3b1 1458 while ((status = readb(base_addr +
02f1175c
JS		 1459 (CySVRR << index))) != 0x00) {
1460 had_work++;
1461 /* The purpose of the following test is to ensure that
1462 no chip can monopolize the driver. This forces the
1463 chips to be checked in a round-robin fashion (after
1464 draining each of a bunch (1000) of characters).
1465 */
1466 if (1000 < too_many++) {
1467 break;
1468 }
1469 cyy_intr_chip(cinfo, chip, base_addr, status,
1470 index);
1471 }
1472 }
1473 } while (had_work);
1474
1475 /* clear interrupts */
1476 spin_lock(&cinfo->card_lock);
1477 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1478 /* Cy_ClrIntr is 0x1800 */
1479 spin_unlock(&cinfo->card_lock);
1480 return IRQ_HANDLED;
1481} /* cyy_interrupt */
1da177e4
LT		 1482
1483/***********************************************************/
1484/********* End of block of Cyclom-Y specific code **********/
1485/******** Start of block of Cyclades-Z specific code *********/
1486/***********************************************************/
1487
1488static int
02f1175c 1489cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1490 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1491{
02f1175c
JS		 1492 struct FIRM_ID __iomem *firm_id;
1493 struct ZFW_CTRL __iomem *zfw_ctrl;
1494 struct BOARD_CTRL __iomem *board_ctrl;
1495 unsigned long loc_doorbell;
1496
1497 firm_id = cinfo->base_addr + ID_ADDRESS;
1498 if (!ISZLOADED(*cinfo)) {
096dcfce 1499 return -1;
02f1175c 1500 }
db05c3b1 1501 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1502 board_ctrl = &zfw_ctrl->board_ctrl;
1503
db05c3b1 1504 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1505 (cinfo->ctl_addr))->loc_doorbell);
1506 if (loc_doorbell) {
1507 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1508 *channel = readl(&board_ctrl->fwcmd_channel);
1509 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1510 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1511 loc_doorbell, 0xffffffff);
1512 return 1;
1513 }
1514 return 0;
1515} /* cyz_fetch_msg */
1da177e4
LT		 1516
1517static int
02f1175c 1518cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1519 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1520{
02f1175c
JS		 1521 struct FIRM_ID __iomem *firm_id;
1522 struct ZFW_CTRL __iomem *zfw_ctrl;
1523 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1524 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1525 int index;
1526
1527 firm_id = cinfo->base_addr + ID_ADDRESS;
1528 if (!ISZLOADED(*cinfo)) {
096dcfce 1529 return -1;
02f1175c 1530 }
db05c3b1 1531 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1532 board_ctrl = &zfw_ctrl->board_ctrl;
1533
1534 index = 0;
1535 pci_doorbell =
1536 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1537 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1538 if (index++ == 1000) {
db05c3b1 1539 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1540 }
1541 udelay(50L);
1542 }
1543 cy_writel(&board_ctrl->hcmd_channel, channel);
1544 cy_writel(&board_ctrl->hcmd_param, param);
1545 cy_writel(pci_doorbell, (long)cmd);
1546
096dcfce 1547 return 0;
02f1175c 1548} /* cyz_issue_cmd */
1da177e4
LT		 1549
1550static void
ad39c300
JS		 1551cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1552 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1553{
02f1175c
JS		 1554 struct cyclades_card *cinfo = &cy_card[info->card];
1555 struct tty_struct *tty = info->tty;
ad39c300 1556 int char_count;
02f1175c 1557 int len;
1da177e4 1558#ifdef BLOCKMOVE
02f1175c 1559 int small_count;
1da177e4 1560#else
02f1175c 1561 char data;
1da177e4 1562#endif
ad39c300 1563 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1564
db05c3b1
JS		 1565 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1566 rx_put = readl(&buf_ctrl->rx_put);
1567 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1568 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1569 if (rx_put >= rx_get)
1570 char_count = rx_put - rx_get;
1571 else
1572 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1573
02f1175c
JS		 1574 if (char_count) {
1575 info->last_active = jiffies;
1576 info->jiffies[1] = jiffies;
1da177e4
LT		 1577
1578#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1579 info->mon.int_count++;
1580 info->mon.char_count += char_count;
1581 if (char_count > info->mon.char_max)
1582 info->mon.char_max = char_count;
1583 info->mon.char_last = char_count;
1da177e4 1584#endif
02f1175c
JS		 1585 if (tty == 0) {
1586 /* flush received characters */
1587 new_rx_get = (new_rx_get + char_count) &
1588 (rx_bufsize - 1);
1589 info->rflush_count++;
1590 } else {
1da177e4 1591#ifdef BLOCKMOVE
02f1175c
JS		 1592 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1593 for performance, but because of buffer boundaries, there
1594 may be several steps to the operation */
1595 while (0 < (small_count = min_t(unsigned int,
1596 rx_bufsize - new_rx_get,
1597 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1598 tty->flip.count, char_count)))){
1599 memcpy_fromio(tty->flip.char_buf_ptr,
1600 (char *)(cinfo->base_addr + rx_bufaddr +
1601 new_rx_get),
1602 small_count);
1603
1604 tty->flip.char_buf_ptr += small_count;
1605 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1606 small_count);
1607 tty->flip.flag_buf_ptr += small_count;
1608 new_rx_get = (new_rx_get + small_count) &
1609 (rx_bufsize - 1);
1610 char_count -= small_count;
1611 info->icount.rx += small_count;
1612 info->idle_stats.recv_bytes += small_count;
1613 tty->flip.count += small_count;
1614 }
1da177e4 1615#else
02f1175c
JS		 1616 len = tty_buffer_request_room(tty, char_count);
1617 while (len--) {
db05c3b1 1618 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1619 new_rx_get);
1620 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1621 tty_insert_flip_char(tty, data, TTY_NORMAL);
1622 info->idle_stats.recv_bytes++;
1623 info->icount.rx++;
1624 }
1da177e4
LT		 1625#endif
1626#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1627 /* Recalculate the number of chars in the RX buffer and issue
1628 a cmd in case it's higher than the RX high water mark */
db05c3b1 1629 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1630 if (rx_put >= rx_get)
1631 char_count = rx_put - rx_get;
1632 else
1633 char_count = rx_put - rx_get + rx_bufsize;
db05c3b1 1634 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
02f1175c
JS		 1635 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1636 }
1da177e4 1637#endif
02f1175c
JS		 1638 info->idle_stats.recv_idle = jiffies;
1639 tty_schedule_flip(tty);
1640 }
1641 /* Update rx_get */
1642 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1643 }
1da177e4
LT		 1644}
1645
1646static void
ad39c300
JS		 1647cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1648 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1649{
02f1175c
JS		 1650 struct cyclades_card *cinfo = &cy_card[info->card];
1651 struct tty_struct *tty = info->tty;
1652 char data;
ad39c300 1653 int char_count;
1da177e4 1654#ifdef BLOCKMOVE
02f1175c 1655 int small_count;
1da177e4 1656#endif
ad39c300 1657 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1658
02f1175c
JS		 1659 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1660 return;
1da177e4 1661
db05c3b1
JS		 1662 tx_get = readl(&buf_ctrl->tx_get);
1663 tx_put = readl(&buf_ctrl->tx_put);
1664 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1665 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1666 if (tx_put >= tx_get)
1667 char_count = tx_get - tx_put - 1 + tx_bufsize;
1668 else
1669 char_count = tx_get - tx_put - 1;
1da177e4 1670
02f1175c 1671 if (char_count) {
1da177e4 1672
02f1175c
JS		 1673 if (tty == 0) {
1674 goto ztxdone;
1675 }
1da177e4 1676
02f1175c
JS		 1677 if (info->x_char) { /* send special char */
1678 data = info->x_char;
1da177e4 1679
02f1175c
JS		 1680 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1681 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1682 info->x_char = 0;
1683 char_count--;
1684 info->icount.tx++;
1685 info->last_active = jiffies;
1686 info->jiffies[2] = jiffies;
1687 }
1da177e4 1688#ifdef BLOCKMOVE
02f1175c
JS		 1689 while (0 < (small_count = min_t(unsigned int,
1690 tx_bufsize - tx_put, min_t(unsigned int,
1691 (SERIAL_XMIT_SIZE - info->xmit_tail),
1692 min_t(unsigned int, info->xmit_cnt,
1693 char_count))))) {
1694
1695 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1696 tx_put),
1697 &info->xmit_buf[info->xmit_tail],
1698 small_count);
1699
1700 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1701 char_count -= small_count;
1702 info->icount.tx += small_count;
1703 info->xmit_cnt -= small_count;
1704 info->xmit_tail = (info->xmit_tail + small_count) &
1705 (SERIAL_XMIT_SIZE - 1);
1706 info->last_active = jiffies;
1707 info->jiffies[2] = jiffies;
1708 }
1da177e4 1709#else
02f1175c
JS		 1710 while (info->xmit_cnt && char_count) {
1711 data = info->xmit_buf[info->xmit_tail];
1712 info->xmit_cnt--;
1713 info->xmit_tail = (info->xmit_tail + 1) &
1714 (SERIAL_XMIT_SIZE - 1);
1715
1716 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1717 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1718 char_count--;
1719 info->icount.tx++;
1720 info->last_active = jiffies;
1721 info->jiffies[2] = jiffies;
1722 }
1da177e4 1723#endif
02f1175c
JS		 1724ztxdone:
1725 if (info->xmit_cnt < WAKEUP_CHARS) {
1726 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1727 }
1728 /* Update tx_put */
1729 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1730 }
1da177e4
LT		 1731}
1732
02f1175c 1733static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1734{
02f1175c
JS		 1735 struct tty_struct *tty;
1736 struct cyclades_port *info;
ad39c300
JS		 1737 static struct FIRM_ID __iomem *firm_id;
1738 static struct ZFW_CTRL __iomem *zfw_ctrl;
1739 static struct BOARD_CTRL __iomem *board_ctrl;
1740 static struct CH_CTRL __iomem *ch_ctrl;
1741 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1742 __u32 channel;
1743 __u8 cmd;
1744 __u32 param;
1745 __u32 hw_ver, fw_ver;
02f1175c
JS		 1746 int special_count;
1747 int delta_count;
1748
1749 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1750 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1751 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1752 fw_ver = readl(&board_ctrl->fw_version);
1753 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1754 mail_box_0);
1755
1756 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1757 special_count = 0;
1758 delta_count = 0;
1759 info = &cy_port[channel + cinfo->first_line];
1760 if ((tty = info->tty) == 0) {
1761 continue;
1da177e4 1762 }
02f1175c
JS		 1763 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1764 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1765
1766 switch (cmd) {
1767 case C_CM_PR_ERROR:
1768 tty_insert_flip_char(tty, 0, TTY_PARITY);
1769 info->icount.rx++;
1770 special_count++;
1771 break;
1772 case C_CM_FR_ERROR:
1773 tty_insert_flip_char(tty, 0, TTY_FRAME);
1774 info->icount.rx++;
1775 special_count++;
1776 break;
1777 case C_CM_RXBRK:
1778 tty_insert_flip_char(tty, 0, TTY_BREAK);
1779 info->icount.rx++;
1780 special_count++;
1781 break;
1782 case C_CM_MDCD:
1783 info->icount.dcd++;
1784 delta_count++;
1785 if (info->flags & ASYNC_CHECK_CD) {
1786 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1787 readl(&ch_ctrl->rs_status)) &
02f1175c
JS		 1788 C_RS_DCD) {
1789 cy_sched_event(info,
1790 Cy_EVENT_OPEN_WAKEUP);
1791 } else {
1792 cy_sched_event(info, Cy_EVENT_HANGUP);
1793 }
1794 }
1795 break;
1796 case C_CM_MCTS:
1797 info->icount.cts++;
1798 delta_count++;
1799 break;
1800 case C_CM_MRI:
1801 info->icount.rng++;
1802 delta_count++;
1803 break;
1804 case C_CM_MDSR:
1805 info->icount.dsr++;
1806 delta_count++;
1807 break;
1da177e4 1808#ifdef Z_WAKE
02f1175c
JS		 1809 case C_CM_IOCTLW:
1810 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1811 break;
1da177e4
LT		 1812#endif
1813#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1814 case C_CM_RXHIWM:
1815 case C_CM_RXNNDT:
1816 case C_CM_INTBACK2:
1817 /* Reception Interrupt */
1da177e4 1818#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1819 printk("cyz_interrupt: rcvd intr, card %d, "
1820 "port %ld\n\r", info->card, channel);
1da177e4 1821#endif
02f1175c
JS		 1822 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1823 break;
1824 case C_CM_TXBEMPTY:
1825 case C_CM_TXLOWWM:
1826 case C_CM_INTBACK:
1827 /* Transmission Interrupt */
1da177e4 1828#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1829 printk("cyz_interrupt: xmit intr, card %d, "
1830 "port %ld\n\r", info->card, channel);
1da177e4 1831#endif
02f1175c
JS		 1832 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1833 break;
1834#endif /* CONFIG_CYZ_INTR */
1835 case C_CM_FATAL:
1836 /* should do something with this !!! */
1837 break;
1838 default:
1839 break;
1840 }
1841 if (delta_count)
1842 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1843 if (special_count)
1844 tty_schedule_flip(tty);
1da177e4 1845 }
1da177e4
LT		 1846}
1847
1848#ifdef CONFIG_CYZ_INTR
02f1175c 1849static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1850{
02f1175c 1851 struct cyclades_card *cinfo;
1da177e4 1852
02f1175c 1853 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1854#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1855 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1856#endif
02f1175c
JS		 1857 return IRQ_NONE; /* spurious interrupt */
1858 }
1da177e4 1859
02f1175c 1860 if (!ISZLOADED(*cinfo)) {
1da177e4 1861#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1862 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1da177e4 1863#endif
02f1175c
JS		 1864 return IRQ_NONE;
1865 }
1da177e4 1866
02f1175c
JS		 1867 /* Handle the interrupts */
1868 cyz_handle_cmd(cinfo);
1da177e4 1869
02f1175c
JS		 1870 return IRQ_HANDLED;
1871} /* cyz_interrupt */
1da177e4 1872
02f1175c 1873static void cyz_rx_restart(unsigned long arg)
1da177e4 1874{
02f1175c
JS		 1875 struct cyclades_port *info = (struct cyclades_port *)arg;
1876 int retval;
1877 int card = info->card;
1a86b5e3 1878 __u32 channel = (info->line) - (cy_card[card].first_line);
02f1175c
JS		 1879 unsigned long flags;
1880
1881 CY_LOCK(info, flags);
1882 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1883 if (retval != 0) {
1884 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1885 info->line, retval);
1886 }
1887 cyz_rx_full_timer[info->line].function = NULL;
1888 CY_UNLOCK(info, flags);
1da177e4
LT		 1889}
1890
02f1175c 1891#else /* CONFIG_CYZ_INTR */
1da177e4 1892
02f1175c 1893static void cyz_poll(unsigned long arg)
1da177e4 1894{
02f1175c
JS		 1895 struct cyclades_card *cinfo;
1896 struct cyclades_port *info;
1897 struct tty_struct *tty;
ad39c300
JS		 1898 static struct FIRM_ID *firm_id;
1899 static struct ZFW_CTRL *zfw_ctrl;
1900 static struct BOARD_CTRL *board_ctrl;
1901 static struct CH_CTRL *ch_ctrl;
1902 static struct BUF_CTRL *buf_ctrl;
b7050906 1903 unsigned long expires = jiffies + HZ;
02f1175c 1904 int card, port;
1da177e4 1905
02f1175c
JS		 1906 for (card = 0; card < NR_CARDS; card++) {
1907 cinfo = &cy_card[card];
1908
1909 if (!IS_CYC_Z(*cinfo))
1910 continue;
1911 if (!ISZLOADED(*cinfo))
1912 continue;
1913
1914 firm_id = cinfo->base_addr + ID_ADDRESS;
1915 zfw_ctrl = cinfo->base_addr +
db05c3b1 1916 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1917 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1918
1919 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1920 if (!cinfo->intr_enabled) {
db05c3b1 1921 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1922 cinfo->intr_enabled = 1;
1923 continue;
1924 }
1da177e4 1925
02f1175c 1926 cyz_handle_cmd(cinfo);
1da177e4 1927
02f1175c
JS		 1928 for (port = 0; port < cinfo->nports; port++) {
1929 info = &cy_port[port + cinfo->first_line];
1930 tty = info->tty;
1931 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1932 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1933
02f1175c
JS		 1934 if (!info->throttle)
1935 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1936 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1937 }
1938 /* poll every 'cyz_polling_cycle' period */
b7050906 1939 expires = jiffies + cyz_polling_cycle;
1da177e4 1940 }
b7050906 1941 mod_timer(&cyz_timerlist, expires);
02f1175c 1942} /* cyz_poll */
1da177e4 1943
02f1175c 1944#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1945
1946/********** End of block of Cyclades-Z specific code *********/
1947/***********************************************************/
1948
1da177e4
LT		 1949/* This is called whenever a port becomes active;
1950 interrupts are enabled and DTR & RTS are turned on.
1951 */
02f1175c 1952static int startup(struct cyclades_port *info)
1da177e4 1953{
02f1175c
JS		 1954 unsigned long flags;
1955 int retval = 0;
1956 void __iomem *base_addr;
1957 int card, chip, channel, index;
1958 unsigned long page;
1da177e4 1959
02f1175c
JS		 1960 card = info->card;
1961 channel = (info->line) - (cy_card[card].first_line);
1da177e4 1962
02f1175c
JS		 1963 page = get_zeroed_page(GFP_KERNEL);
1964 if (!page)
1965 return -ENOMEM;
1da177e4 1966
02f1175c 1967 CY_LOCK(info, flags);
1da177e4 1968
02f1175c
JS		 1969 if (info->flags & ASYNC_INITIALIZED) {
1970 free_page(page);
1971 goto errout;
1972 }
1da177e4 1973
02f1175c
JS		 1974 if (!info->type) {
1975 if (info->tty) {
1976 set_bit(TTY_IO_ERROR, &info->tty->flags);
1977 }
1978 free_page(page);
1979 goto errout;
1980 }
1da177e4 1981
02f1175c
JS		 1982 if (info->xmit_buf)
1983 free_page(page);
1984 else
1985 info->xmit_buf = (unsigned char *)page;
1da177e4 1986
02f1175c 1987 CY_UNLOCK(info, flags);
1da177e4 1988
02f1175c 1989 set_line_char(info);
1da177e4 1990
02f1175c
JS		 1991 if (!IS_CYC_Z(cy_card[card])) {
1992 chip = channel >> 2;
1993 channel &= 0x03;
1994 index = cy_card[card].bus_index;
1995 base_addr = cy_card[card].base_addr +
1996 (cy_chip_offset[chip] << index);
1da177e4
LT		 1997
1998#ifdef CY_DEBUG_OPEN
02f1175c
JS		 1999 printk("cyc startup card %d, chip %d, channel %d, "
2000 "base_addr %lx\n",
2001 card, chip, channel, (long)base_addr);
2002 /**/
1da177e4 2003#endif
02f1175c 2004 CY_LOCK(info, flags);
1da177e4 2005
02f1175c 2006 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 2007
02f1175c
JS		 2008 cy_writeb(base_addr + (CyRTPR << index),
2009 (info->default_timeout ? info->default_timeout : 0x02));
2010 /* 10ms rx timeout */
1da177e4 2011
02f1175c
JS		 2012 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2013 index);
1da177e4 2014
02f1175c
JS		 2015 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2016 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2017 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 2018
2019#ifdef CY_DEBUG_DTR
02f1175c
JS		 2020 printk("cyc:startup raising DTR\n");
2021 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2022 readb(base_addr + (CyMSVR1 << index)),
2023 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 2024#endif
2025
02f1175c 2026 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2027 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 2028 info->flags |= ASYNC_INITIALIZED;
1da177e4 2029
02f1175c
JS		 2030 if (info->tty) {
2031 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2032 }
2033 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2034 info->breakon = info->breakoff = 0;
2035 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2036 info->idle_stats.in_use =
2037 info->idle_stats.recv_idle =
2038 info->idle_stats.xmit_idle = jiffies;
1da177e4 2039
02f1175c 2040 CY_UNLOCK(info, flags);
1da177e4 2041
02f1175c
JS		 2042 } else {
2043 struct FIRM_ID __iomem *firm_id;
2044 struct ZFW_CTRL __iomem *zfw_ctrl;
2045 struct BOARD_CTRL __iomem *board_ctrl;
2046 struct CH_CTRL __iomem *ch_ctrl;
2047 int retval;
1da177e4 2048
02f1175c 2049 base_addr = cy_card[card].base_addr;
1da177e4 2050
02f1175c
JS		 2051 firm_id = base_addr + ID_ADDRESS;
2052 if (!ISZLOADED(cy_card[card])) {
2053 return -ENODEV;
2054 }
1da177e4 2055
02f1175c 2056 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2057 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2058 board_ctrl = &zfw_ctrl->board_ctrl;
2059 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2060
2061#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2062 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2063 card, channel, (long)base_addr);
2064 /**/
1da177e4 2065#endif
02f1175c 2066 CY_LOCK(info, flags);
1da177e4 2067
02f1175c 2068 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2069#ifdef Z_WAKE
2070#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2071 cy_writel(&ch_ctrl[channel].intr_enable,
2072 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2073 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2074#else
02f1175c
JS		 2075 cy_writel(&ch_ctrl[channel].intr_enable,
2076 C_IN_IOCTLW | C_IN_MDCD);
2077#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2078#else
2079#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2080 cy_writel(&ch_ctrl[channel].intr_enable,
2081 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2082 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2083#else
02f1175c
JS		 2084 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2085#endif /* CONFIG_CYZ_INTR */
2086#endif /* Z_WAKE */
2087
2088 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2089 if (retval != 0) {
2090 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2091 info->line, retval);
2092 }
1da177e4 2093
02f1175c
JS		 2094 /* Flush RX buffers before raising DTR and RTS */
2095 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2096 0L);
2097 if (retval != 0) {
2098 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2099 info->line, retval);
2100 }
1da177e4 2101
02f1175c
JS		 2102 /* set timeout !!! */
2103 /* set RTS and DTR !!! */
2104 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2105 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c
JS		 2106 C_RS_DTR);
2107 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2108 C_CM_IOCTLM, 0L);
2109 if (retval != 0) {
2110 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2111 info->line, retval);
2112 }
1da177e4 2113#ifdef CY_DEBUG_DTR
02f1175c 2114 printk("cyc:startup raising Z DTR\n");
1da177e4
LT		 2115#endif
2116
02f1175c
JS		 2117 /* enable send, recv, modem !!! */
2118
2119 info->flags |= ASYNC_INITIALIZED;
2120 if (info->tty) {
2121 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2122 }
2123 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2124 info->breakon = info->breakoff = 0;
2125 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2126 info->idle_stats.in_use =
2127 info->idle_stats.recv_idle =
2128 info->idle_stats.xmit_idle = jiffies;
1da177e4 2129
02f1175c 2130 CY_UNLOCK(info, flags);
1da177e4 2131 }
1da177e4
LT		 2132
2133#ifdef CY_DEBUG_OPEN
2134 printk(" cyc startup done\n");
2135#endif
2136 return 0;
2137
2138errout:
2139 CY_UNLOCK(info, flags);
2140 return retval;
02f1175c 2141} /* startup */
1da177e4 2142
02f1175c 2143static void start_xmit(struct cyclades_port *info)
1da177e4 2144{
02f1175c
JS		 2145 unsigned long flags;
2146 void __iomem *base_addr;
2147 int card, chip, channel, index;
1da177e4 2148
02f1175c
JS		 2149 card = info->card;
2150 channel = (info->line) - (cy_card[card].first_line);
2151 if (!IS_CYC_Z(cy_card[card])) {
2152 chip = channel >> 2;
2153 channel &= 0x03;
2154 index = cy_card[card].bus_index;
2155 base_addr = cy_card[card].base_addr +
2156 (cy_chip_offset[chip] << index);
2157
2158 CY_LOCK(info, flags);
2159 cy_writeb(base_addr + (CyCAR << index), channel);
2160 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2161 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 2162 CY_UNLOCK(info, flags);
2163 } else {
1da177e4 2164#ifdef CONFIG_CYZ_INTR
02f1175c 2165 int retval;
1da177e4 2166
02f1175c
JS		 2167 CY_LOCK(info, flags);
2168 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2169 0L);
2170 if (retval != 0) {
2171 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2172 info->line, retval);
2173 }
2174 CY_UNLOCK(info, flags);
2175#else /* CONFIG_CYZ_INTR */
2176 /* Don't have to do anything at this time */
2177#endif /* CONFIG_CYZ_INTR */
2178 }
2179} /* start_xmit */
1da177e4
LT		 2180
2181/*
2182 * This routine shuts down a serial port; interrupts are disabled,
2183 * and DTR is dropped if the hangup on close termio flag is on.
2184 */
02f1175c 2185static void shutdown(struct cyclades_port *info)
1da177e4 2186{
02f1175c
JS		 2187 unsigned long flags;
2188 void __iomem *base_addr;
2189 int card, chip, channel, index;
2190
2191 if (!(info->flags & ASYNC_INITIALIZED)) {
2192 return;
2193 }
2194
2195 card = info->card;
2196 channel = info->line - cy_card[card].first_line;
2197 if (!IS_CYC_Z(cy_card[card])) {
2198 chip = channel >> 2;
2199 channel &= 0x03;
2200 index = cy_card[card].bus_index;
2201 base_addr = cy_card[card].base_addr +
2202 (cy_chip_offset[chip] << index);
1da177e4
LT		 2203
2204#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2205 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2206 "base_addr %lx\n",
2207 card, chip, channel, (long)base_addr);
1da177e4
LT		 2208#endif
2209
02f1175c
JS		 2210 CY_LOCK(info, flags);
2211
2212 /* Clear delta_msr_wait queue to avoid mem leaks. */
2213 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2214
02f1175c
JS		 2215 if (info->xmit_buf) {
2216 unsigned char *temp;
2217 temp = info->xmit_buf;
2218 info->xmit_buf = NULL;
2219 free_page((unsigned long)temp);
2220 }
2221 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2222 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2223 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2224 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2225#ifdef CY_DEBUG_DTR
02f1175c
JS		 2226 printk("cyc shutdown dropping DTR\n");
2227 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2228 readb(base_addr + (CyMSVR1 << index)),
2229 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2230#endif
02f1175c
JS		 2231 }
2232 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2233 /* it may be appropriate to clear _XMIT at
2234 some later date (after testing)!!! */
2235
2236 if (info->tty) {
2237 set_bit(TTY_IO_ERROR, &info->tty->flags);
2238 }
2239 info->flags &= ~ASYNC_INITIALIZED;
2240 CY_UNLOCK(info, flags);
2241 } else {
2242 struct FIRM_ID __iomem *firm_id;
2243 struct ZFW_CTRL __iomem *zfw_ctrl;
2244 struct BOARD_CTRL __iomem *board_ctrl;
2245 struct CH_CTRL __iomem *ch_ctrl;
2246 int retval;
2247
2248 base_addr = cy_card[card].base_addr;
1da177e4 2249#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2250 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2251 card, channel, (long)base_addr);
1da177e4
LT		 2252#endif
2253
02f1175c
JS		 2254 firm_id = base_addr + ID_ADDRESS;
2255 if (!ISZLOADED(cy_card[card])) {
2256 return;
2257 }
1da177e4 2258
02f1175c 2259 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2260 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2261 board_ctrl = &zfw_ctrl->board_ctrl;
2262 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2263
02f1175c 2264 CY_LOCK(info, flags);
1da177e4 2265
02f1175c
JS		 2266 if (info->xmit_buf) {
2267 unsigned char *temp;
2268 temp = info->xmit_buf;
2269 info->xmit_buf = NULL;
2270 free_page((unsigned long)temp);
1da177e4 2271 }
02f1175c
JS		 2272
2273 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2274 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2275 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c
JS		 2276 ~(C_RS_RTS | C_RS_DTR)));
2277 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2278 C_CM_IOCTLM, 0L);
2279 if (retval != 0) {
2280 printk("cyc:shutdown retval on ttyC%d was %x\n",
2281 info->line, retval);
2282 }
1da177e4 2283#ifdef CY_DEBUG_DTR
02f1175c 2284 printk("cyc:shutdown dropping Z DTR\n");
1da177e4 2285#endif
02f1175c 2286 }
1da177e4 2287
02f1175c
JS		 2288 if (info->tty) {
2289 set_bit(TTY_IO_ERROR, &info->tty->flags);
2290 }
2291 info->flags &= ~ASYNC_INITIALIZED;
2292
2293 CY_UNLOCK(info, flags);
2294 }
1da177e4
LT		 2295
2296#ifdef CY_DEBUG_OPEN
02f1175c 2297 printk(" cyc shutdown done\n");
1da177e4 2298#endif
02f1175c 2299} /* shutdown */
1da177e4
LT		 2300
2301/*
2302 * ------------------------------------------------------------
2303 * cy_open() and friends
2304 * ------------------------------------------------------------
2305 */
2306
2307static int
02f1175c
JS		 2308block_til_ready(struct tty_struct *tty, struct file *filp,
2309 struct cyclades_port *info)
1da177e4 2310{
02f1175c
JS		 2311 DECLARE_WAITQUEUE(wait, current);
2312 struct cyclades_card *cinfo;
2313 unsigned long flags;
2314 int chip, channel, index;
2315 int retval;
2316 void __iomem *base_addr;
2317
2318 cinfo = &cy_card[info->card];
2319 channel = info->line - cinfo->first_line;
2320
2321 /*
2322 * If the device is in the middle of being closed, then block
2323 * until it's done, and then try again.
2324 */
2325 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2326 if (info->flags & ASYNC_CLOSING) {
2327 interruptible_sleep_on(&info->close_wait);
2328 }
096dcfce 2329 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2330 }
02f1175c
JS		 2331
2332 /*
2333 * If non-blocking mode is set, then make the check up front
2334 * and then exit.
2335 */
2336 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2337 info->flags |= ASYNC_NORMAL_ACTIVE;
2338 return 0;
2339 }
2340
2341 /*
2342 * Block waiting for the carrier detect and the line to become
2343 * free (i.e., not in use by the callout). While we are in
2344 * this loop, info->count is dropped by one, so that
2345 * cy_close() knows when to free things. We restore it upon
2346 * exit, either normal or abnormal.
2347 */
2348 retval = 0;
2349 add_wait_queue(&info->open_wait, &wait);
1da177e4 2350#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2351 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2352 info->line, info->count);
2353 /**/
1da177e4 2354#endif
02f1175c
JS		 2355 CY_LOCK(info, flags);
2356 if (!tty_hung_up_p(filp))
2357 info->count--;
2358 CY_UNLOCK(info, flags);
1da177e4 2359#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2360 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2361 current->pid, info->count);
1da177e4 2362#endif
02f1175c
JS		 2363 info->blocked_open++;
2364
2365 if (!IS_CYC_Z(*cinfo)) {
2366 chip = channel >> 2;
2367 channel &= 0x03;
2368 index = cinfo->bus_index;
2369 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2370
2371 while (1) {
2372 CY_LOCK(info, flags);
2373 if ((tty->termios->c_cflag & CBAUD)) {
2374 cy_writeb(base_addr + (CyCAR << index),
2375 (u_char) channel);
2376 cy_writeb(base_addr + (CyMSVR1 << index),
2377 CyRTS);
2378 cy_writeb(base_addr + (CyMSVR2 << index),
2379 CyDTR);
1da177e4 2380#ifdef CY_DEBUG_DTR
02f1175c
JS		 2381 printk("cyc:block_til_ready raising DTR\n");
2382 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2383 readb(base_addr + (CyMSVR1 << index)),
2384 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2385#endif
02f1175c
JS		 2386 }
2387 CY_UNLOCK(info, flags);
1da177e4 2388
02f1175c
JS		 2389 set_current_state(TASK_INTERRUPTIBLE);
2390 if (tty_hung_up_p(filp) ||
2391 !(info->flags & ASYNC_INITIALIZED)) {
2392 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2393 -EAGAIN : -ERESTARTSYS);
2394 break;
2395 }
1da177e4 2396
02f1175c
JS		 2397 CY_LOCK(info, flags);
2398 cy_writeb(base_addr + (CyCAR << index),
2399 (u_char) channel);
2400 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2401 (readb(base_addr +
02f1175c
JS		 2402 (CyMSVR1 << index)) & CyDCD))) {
2403 CY_UNLOCK(info, flags);
2404 break;
2405 }
1da177e4 2406 CY_UNLOCK(info, flags);
1da177e4 2407
02f1175c
JS		 2408 if (signal_pending(current)) {
2409 retval = -ERESTARTSYS;
2410 break;
2411 }
1da177e4 2412#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2413 printk("cyc block_til_ready blocking: ttyC%d, "
2414 "count = %d\n",
2415 info->line, info->count);
2416 /**/
1da177e4 2417#endif
02f1175c 2418 schedule();
1da177e4 2419 }
02f1175c
JS		 2420 } else {
2421 struct FIRM_ID __iomem *firm_id;
2422 struct ZFW_CTRL __iomem *zfw_ctrl;
2423 struct BOARD_CTRL __iomem *board_ctrl;
2424 struct CH_CTRL __iomem *ch_ctrl;
2425 int retval;
2426
2427 base_addr = cinfo->base_addr;
2428 firm_id = base_addr + ID_ADDRESS;
2429 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2430 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2431 remove_wait_queue(&info->open_wait, &wait);
2432 return -EINVAL;
2433 }
2434
db05c3b1 2435 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2436 board_ctrl = &zfw_ctrl->board_ctrl;
2437 ch_ctrl = zfw_ctrl->ch_ctrl;
2438
2439 while (1) {
2440 if ((tty->termios->c_cflag & CBAUD)) {
2441 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2442 readl(&ch_ctrl[channel].rs_control) |
2443 C_RS_RTS | C_RS_DTR);
02f1175c 2444 retval = cyz_issue_cmd(&cy_card[info->card],
db05c3b1 2445 channel, C_CM_IOCTLM, 0L);
02f1175c
JS		 2446 if (retval != 0) {
2447 printk("cyc:block_til_ready retval on "
2448 "ttyC%d was %x\n",
2449 info->line, retval);
2450 }
1da177e4 2451#ifdef CY_DEBUG_DTR
02f1175c 2452 printk("cyc:block_til_ready raising Z DTR\n");
1da177e4 2453#endif
02f1175c 2454 }
1da177e4 2455
02f1175c
JS		 2456 set_current_state(TASK_INTERRUPTIBLE);
2457 if (tty_hung_up_p(filp) ||
2458 !(info->flags & ASYNC_INITIALIZED)) {
2459 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2460 -EAGAIN : -ERESTARTSYS);
2461 break;
2462 }
2463 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2464 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2465 C_RS_DCD))) {
2466 break;
2467 }
2468 if (signal_pending(current)) {
2469 retval = -ERESTARTSYS;
2470 break;
2471 }
1da177e4 2472#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2473 printk("cyc block_til_ready blocking: ttyC%d, "
2474 "count = %d\n",
2475 info->line, info->count);
2476 /**/
1da177e4 2477#endif
02f1175c
JS		 2478 schedule();
2479 }
1da177e4 2480 }
cc0a8fbb 2481 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2482 remove_wait_queue(&info->open_wait, &wait);
2483 if (!tty_hung_up_p(filp)) {
2484 info->count++;
1da177e4 2485#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2486 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2487 current->pid, info->count);
1da177e4 2488#endif
02f1175c
JS		 2489 }
2490 info->blocked_open--;
1da177e4 2491#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2492 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2493 info->line, info->count);
2494 /**/
1da177e4 2495#endif
02f1175c
JS		 2496 if (retval)
2497 return retval;
2498 info->flags |= ASYNC_NORMAL_ACTIVE;
2499 return 0;
2500} /* block_til_ready */
1da177e4
LT		 2501
2502/*
2503 * This routine is called whenever a serial port is opened. It
2504 * performs the serial-specific initialization for the tty structure.
2505 */
02f1175c 2506static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2507{
02f1175c
JS		 2508 struct cyclades_port *info;
2509 int retval, line;
1da177e4 2510
02f1175c
JS		 2511 line = tty->index;
2512 if ((line < 0) || (NR_PORTS <= line)) {
2513 return -ENODEV;
2514 }
2515 info = &cy_port[line];
2516 if (info->line < 0) {
2517 return -ENODEV;
2518 }
1da177e4 2519
02f1175c
JS		 2520 /* If the card's firmware hasn't been loaded,
2521 treat it as absent from the system. This
2522 will make the user pay attention.
2523 */
2524 if (IS_CYC_Z(cy_card[info->card])) {
2525 struct cyclades_card *cinfo = &cy_card[info->card];
2526 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2527
2528 if (!ISZLOADED(*cinfo)) {
db05c3b1 2529 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2530 (cinfo->ctl_addr))->mail_box_0)) &&
2531 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2532 (ZFIRM_HLT == readl(
02f1175c
JS		 2533 &firm_id->signature))) {
2534 printk("cyc:Cyclades-Z Error: you need an "
2535 "external power supply for this number "
2536 "of ports.\n\rFirmware halted.\r\n");
2537 } else {
2538 printk("cyc:Cyclades-Z firmware not yet "
2539 "loaded\n");
2540 }
2541 return -ENODEV;
2542 }
2543#ifdef CONFIG_CYZ_INTR
2544 else {
2545 /* In case this Z board is operating in interrupt mode, its
2546 interrupts should be enabled as soon as the first open
2547 happens to one of its ports. */
2548 if (!cinfo->intr_enabled) {
2549 struct ZFW_CTRL __iomem *zfw_ctrl;
2550 struct BOARD_CTRL __iomem *board_ctrl;
2551
2552 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2553 (readl(&firm_id->zfwctrl_addr) &
2554 0xfffff);
02f1175c
JS		 2555
2556 board_ctrl = &zfw_ctrl->board_ctrl;
2557
2558 /* Enable interrupts on the PLX chip */
2559 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2560 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2561 /* Enable interrupts on the FW */
2562 retval = cyz_issue_cmd(cinfo, 0,
2563 C_CM_IRQ_ENBL, 0L);
2564 if (retval != 0) {
2565 printk("cyc:IRQ enable retval was %x\n",
2566 retval);
2567 }
2568 cinfo->nports =
db05c3b1 2569 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2570 cinfo->intr_enabled = 1;
2571 }
1da177e4 2572 }
02f1175c
JS		 2573#endif /* CONFIG_CYZ_INTR */
2574 /* Make sure this Z port really exists in hardware */
2575 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2576 return -ENODEV;
1da177e4 2577 }
1da177e4 2578#ifdef CY_DEBUG_OTHER
02f1175c 2579 printk("cyc:cy_open ttyC%d\n", info->line); /* */
1da177e4 2580#endif
02f1175c
JS		 2581 tty->driver_data = info;
2582 info->tty = tty;
2583 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2584 return -ENODEV;
2585 }
1da177e4 2586#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2587 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2588 /**/
1da177e4 2589#endif
02f1175c 2590 info->count++;
1da177e4 2591#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2592 printk("cyc:cy_open (%d): incrementing count to %d\n",
2593 current->pid, info->count);
1da177e4 2594#endif
1da177e4 2595
02f1175c
JS		 2596 /*
2597 * If the port is the middle of closing, bail out now
2598 */
2599 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2600 if (info->flags & ASYNC_CLOSING)
2601 interruptible_sleep_on(&info->close_wait);
096dcfce 2602 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2603 }
1da177e4 2604
02f1175c
JS		 2605 /*
2606 * Start up serial port
2607 */
2608 retval = startup(info);
2609 if (retval) {
2610 return retval;
2611 }
1da177e4 2612
02f1175c
JS		 2613 retval = block_til_ready(tty, filp, info);
2614 if (retval) {
1da177e4 2615#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2616 printk("cyc:cy_open returning after block_til_ready with %d\n",
2617 retval);
1da177e4 2618#endif
02f1175c
JS		 2619 return retval;
2620 }
1da177e4 2621
02f1175c 2622 info->throttle = 0;
1da177e4 2623
02f1175c
JS		 2624#ifdef CY_DEBUG_OPEN
2625 printk(" cyc:cy_open done\n");
2626 /**/
2627#endif
2628 return 0;
2629} /* cy_open */
1da177e4
LT		 2630
2631/*
2632 * cy_wait_until_sent() --- wait until the transmitter is empty
2633 */
02f1175c 2634static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2635{
cab9bdd1 2636 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2637 void __iomem *base_addr;
2638 int card, chip, channel, index;
2639 unsigned long orig_jiffies;
2640 int char_time;
2641
2642 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2643 return;
2644
2645 if (info->xmit_fifo_size == 0)
2646 return; /* Just in case.... */
1da177e4 2647
02f1175c
JS		 2648 orig_jiffies = jiffies;
2649 /*
2650 * Set the check interval to be 1/5 of the estimated time to
2651 * send a single character, and make it at least 1. The check
2652 * interval should also be less than the timeout.
2653 *
2654 * Note: we have to use pretty tight timings here to satisfy
2655 * the NIST-PCTS.
2656 */
2657 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2658 char_time = char_time / 5;
2659 if (char_time <= 0)
2660 char_time = 1;
2661 if (timeout < 0)
2662 timeout = 0;
2663 if (timeout)
2664 char_time = min(char_time, timeout);
2665 /*
2666 * If the transmitter hasn't cleared in twice the approximate
2667 * amount of time to send the entire FIFO, it probably won't
2668 * ever clear. This assumes the UART isn't doing flow
2669 * control, which is currently the case. Hence, if it ever
2670 * takes longer than info->timeout, this is probably due to a
2671 * UART bug of some kind. So, we clamp the timeout parameter at
2672 * 2*info->timeout.
2673 */
2674 if (!timeout || timeout > 2 * info->timeout)
2675 timeout = 2 * info->timeout;
1da177e4 2676#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c
JS		 2677 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2678 printk("jiff=%lu...", jiffies);
1da177e4 2679#endif
02f1175c
JS		 2680 card = info->card;
2681 channel = (info->line) - (cy_card[card].first_line);
2682 if (!IS_CYC_Z(cy_card[card])) {
2683 chip = channel >> 2;
2684 channel &= 0x03;
2685 index = cy_card[card].bus_index;
2686 base_addr =
2687 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2688 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2689#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2690 printk("Not clean (jiff=%lu)...", jiffies);
1da177e4 2691#endif
02f1175c
JS		 2692 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2693 break;
2694 if (timeout && time_after(jiffies, orig_jiffies +
2695 timeout))
2696 break;
2697 }
2698 } else {
096dcfce 2699 /* Nothing to do! */
1da177e4 2700 }
02f1175c
JS		 2701 /* Run one more char cycle */
2702 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2703#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2704 printk("Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2705#endif
2706}
2707
2708/*
2709 * This routine is called when a particular tty device is closed.
2710 */
02f1175c 2711static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2712{
cab9bdd1 2713 struct cyclades_port *info = tty->driver_data;
02f1175c 2714 unsigned long flags;
1da177e4
LT		 2715
2716#ifdef CY_DEBUG_OTHER
02f1175c 2717 printk("cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2718#endif
2719
02f1175c
JS		 2720 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2721 return;
2722 }
1da177e4 2723
02f1175c
JS		 2724 CY_LOCK(info, flags);
2725 /* If the TTY is being hung up, nothing to do */
2726 if (tty_hung_up_p(filp)) {
2727 CY_UNLOCK(info, flags);
2728 return;
2729 }
1da177e4 2730#ifdef CY_DEBUG_OPEN
02f1175c 2731 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
1da177e4 2732#endif
02f1175c
JS		 2733 if ((tty->count == 1) && (info->count != 1)) {
2734 /*
2735 * Uh, oh. tty->count is 1, which means that the tty
2736 * structure will be freed. Info->count should always
2737 * be one in these conditions. If it's greater than
2738 * one, we've got real problems, since it means the
2739 * serial port won't be shutdown.
2740 */
2741 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2742 "info->count is %d\n", info->count);
2743 info->count = 1;
2744 }
1da177e4 2745#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2746 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2747 current->pid, info->count - 1);
1da177e4 2748#endif
02f1175c 2749 if (--info->count < 0) {
1da177e4 2750#ifdef CY_DEBUG_COUNT
02f1175c 2751 printk("cyc:cyc_close setting count to 0\n");
1da177e4 2752#endif
02f1175c 2753 info->count = 0;
1da177e4 2754 }
02f1175c
JS		 2755 if (info->count) {
2756 CY_UNLOCK(info, flags);
2757 return;
2758 }
2759 info->flags |= ASYNC_CLOSING;
1da177e4 2760
02f1175c
JS		 2761 /*
2762 * Now we wait for the transmit buffer to clear; and we notify
2763 * the line discipline to only process XON/XOFF characters.
2764 */
2765 tty->closing = 1;
2766 CY_UNLOCK(info, flags);
2767 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2768 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2769 }
02f1175c
JS		 2770 CY_LOCK(info, flags);
2771
2772 if (!IS_CYC_Z(cy_card[info->card])) {
2773 int channel = info->line - cy_card[info->card].first_line;
2774 int index = cy_card[info->card].bus_index;
2775 void __iomem *base_addr = cy_card[info->card].base_addr +
2776 (cy_chip_offset[channel >> 2] << index);
2777 /* Stop accepting input */
2778 channel &= 0x03;
2779 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2780 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2781 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2782 if (info->flags & ASYNC_INITIALIZED) {
2783 /* Waiting for on-board buffers to be empty before closing
2784 the port */
2785 CY_UNLOCK(info, flags);
2786 cy_wait_until_sent(tty, info->timeout);
2787 CY_LOCK(info, flags);
2788 }
2789 } else {
2790#ifdef Z_WAKE
2791 /* Waiting for on-board buffers to be empty before closing the port */
2792 void __iomem *base_addr = cy_card[info->card].base_addr;
2793 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2794 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2795 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2796 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2797 int channel = info->line - cy_card[info->card].first_line;
2798 int retval;
2799
db05c3b1 2800 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
02f1175c
JS		 2801 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2802 C_CM_IOCTLW, 0L);
2803 if (retval != 0) {
2804 printk("cyc:cy_close retval on ttyC%d was %x\n",
2805 info->line, retval);
2806 }
2807 CY_UNLOCK(info, flags);
2808 interruptible_sleep_on(&info->shutdown_wait);
2809 CY_LOCK(info, flags);
2810 }
1da177e4 2811#endif
02f1175c
JS		 2812 }
2813
1da177e4 2814 CY_UNLOCK(info, flags);
02f1175c
JS		 2815 shutdown(info);
2816 if (tty->driver->flush_buffer)
2817 tty->driver->flush_buffer(tty);
2818 tty_ldisc_flush(tty);
1da177e4 2819 CY_LOCK(info, flags);
02f1175c
JS		 2820
2821 tty->closing = 0;
2822 info->event = 0;
2823 info->tty = NULL;
2824 if (info->blocked_open) {
2825 CY_UNLOCK(info, flags);
2826 if (info->close_delay) {
2827 msleep_interruptible(jiffies_to_msecs
2828 (info->close_delay));
2829 }
2830 wake_up_interruptible(&info->open_wait);
2831 CY_LOCK(info, flags);
2832 }
2833 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2834 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2835
2836#ifdef CY_DEBUG_OTHER
02f1175c 2837 printk(" cyc:cy_close done\n");
1da177e4
LT		 2838#endif
2839
02f1175c 2840 CY_UNLOCK(info, flags);
02f1175c 2841} /* cy_close */
1da177e4
LT		 2842
2843/* This routine gets called when tty_write has put something into
2844 * the write_queue. The characters may come from user space or
2845 * kernel space.
2846 *
2847 * This routine will return the number of characters actually
2848 * accepted for writing.
2849 *
2850 * If the port is not already transmitting stuff, start it off by
2851 * enabling interrupts. The interrupt service routine will then
2852 * ensure that the characters are sent.
2853 * If the port is already active, there is no need to kick it.
2854 *
2855 */
02f1175c 2856static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2857{
cab9bdd1 2858 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2859 unsigned long flags;
2860 int c, ret = 0;
1da177e4
LT		 2861
2862#ifdef CY_DEBUG_IO
02f1175c 2863 printk("cyc:cy_write ttyC%d\n", info->line); /* */
1da177e4
LT		 2864#endif
2865
02f1175c
JS		 2866 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2867 return 0;
2868 }
1da177e4 2869
02f1175c
JS		 2870 if (!info->xmit_buf)
2871 return 0;
1da177e4 2872
02f1175c
JS		 2873 CY_LOCK(info, flags);
2874 while (1) {
2875 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2876 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2877
2878 if (c <= 0)
2879 break;
2880
2881 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2882 info->xmit_head = (info->xmit_head + c) &
2883 (SERIAL_XMIT_SIZE - 1);
2884 info->xmit_cnt += c;
2885 buf += c;
2886 count -= c;
2887 ret += c;
2888 }
2889 CY_UNLOCK(info, flags);
2890
2891 info->idle_stats.xmit_bytes += ret;
2892 info->idle_stats.xmit_idle = jiffies;
2893
2894 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2895 start_xmit(info);
2896 }
2897 return ret;
2898} /* cy_write */
1da177e4
LT		 2899
2900/*
2901 * This routine is called by the kernel to write a single
2902 * character to the tty device. If the kernel uses this routine,
2903 * it must call the flush_chars() routine (if defined) when it is
2904 * done stuffing characters into the driver. If there is no room
2905 * in the queue, the character is ignored.
2906 */
02f1175c 2907static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2908{
cab9bdd1 2909 struct cyclades_port *info = tty->driver_data;
02f1175c 2910 unsigned long flags;
1da177e4
LT		 2911
2912#ifdef CY_DEBUG_IO
02f1175c 2913 printk("cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2914#endif
2915
02f1175c
JS		 2916 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2917 return;
1da177e4 2918
02f1175c
JS		 2919 if (!info->xmit_buf)
2920 return;
1da177e4 2921
02f1175c 2922 CY_LOCK(info, flags);
90cc3018 2923 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
02f1175c
JS		 2924 CY_UNLOCK(info, flags);
2925 return;
2926 }
1da177e4 2927
02f1175c
JS		 2928 info->xmit_buf[info->xmit_head++] = ch;
2929 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2930 info->xmit_cnt++;
1da177e4
LT		 2931 info->idle_stats.xmit_bytes++;
2932 info->idle_stats.xmit_idle = jiffies;
02f1175c
JS		 2933 CY_UNLOCK(info, flags);
2934} /* cy_put_char */
1da177e4
LT		 2935
2936/*
2937 * This routine is called by the kernel after it has written a
2938 * series of characters to the tty device using put_char().
2939 */
02f1175c 2940static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2941{
cab9bdd1 2942 struct cyclades_port *info = tty->driver_data;
02f1175c 2943
1da177e4 2944#ifdef CY_DEBUG_IO
02f1175c 2945 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
1da177e4
LT		 2946#endif
2947
02f1175c
JS		 2948 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2949 return;
1da177e4 2950
02f1175c
JS		 2951 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2952 !info->xmit_buf)
2953 return;
1da177e4 2954
02f1175c
JS		 2955 start_xmit(info);
2956} /* cy_flush_chars */
1da177e4
LT		 2957
2958/*
2959 * This routine returns the numbers of characters the tty driver
2960 * will accept for queuing to be written. This number is subject
2961 * to change as output buffers get emptied, or if the output flow
2962 * control is activated.
2963 */
02f1175c 2964static int cy_write_room(struct tty_struct *tty)
1da177e4 2965{
cab9bdd1 2966 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2967 int ret;
2968
1da177e4 2969#ifdef CY_DEBUG_IO
02f1175c 2970 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
1da177e4
LT		 2971#endif
2972
02f1175c
JS		 2973 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2974 return 0;
2975 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2976 if (ret < 0)
2977 ret = 0;
2978 return ret;
2979} /* cy_write_room */
1da177e4 2980
02f1175c 2981static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2982{
cab9bdd1 2983 struct cyclades_port *info = tty->driver_data;
02f1175c 2984 int card, channel;
1da177e4 2985
02f1175c
JS		 2986 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2987 return 0;
2988
2989 card = info->card;
2990 channel = (info->line) - (cy_card[card].first_line);
1da177e4
LT		 2991
2992#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2993 if (!IS_CYC_Z(cy_card[card])) {
2994#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2995#ifdef CY_DEBUG_IO
02f1175c 2996 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
1da177e4 2997#endif
02f1175c 2998 return info->xmit_cnt;
1da177e4 2999#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 3000 } else {
ad39c300
JS		 3001 static struct FIRM_ID *firm_id;
3002 static struct ZFW_CTRL *zfw_ctrl;
3003 static struct CH_CTRL *ch_ctrl;
3004 static struct BUF_CTRL *buf_ctrl;
02f1175c 3005 int char_count;
ad39c300 3006 __u32 tx_put, tx_get, tx_bufsize;
02f1175c
JS		 3007
3008 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3009 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3010 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3011 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3012 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3013
db05c3b1
JS		 3014 tx_get = readl(&buf_ctrl->tx_get);
3015 tx_put = readl(&buf_ctrl->tx_put);
3016 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 3017 if (tx_put >= tx_get)
3018 char_count = tx_put - tx_get;
3019 else
3020 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 3021#ifdef CY_DEBUG_IO
02f1175c 3022 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
1da177e4 3023#endif
096dcfce 3024 return info->xmit_cnt + char_count;
02f1175c
JS		 3025 }
3026#endif /* Z_EXT_CHARS_IN_BUFFER */
3027} /* cy_chars_in_buffer */
1da177e4
LT		 3028
3029/*
3030 * ------------------------------------------------------------
3031 * cy_ioctl() and friends
3032 * ------------------------------------------------------------
3033 */
3034
1a86b5e3 3035static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 3036{
02f1175c 3037 int co, co_val, bpr;
1a86b5e3 3038 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 3039 25000000);
1da177e4 3040
02f1175c
JS		 3041 if (baud == 0) {
3042 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3043 return;
3044 }
1da177e4 3045
02f1175c
JS		 3046 /* determine which prescaler to use */
3047 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3048 if (cy_clock / co_val / baud > 63)
3049 break;
3050 }
1da177e4 3051
02f1175c
JS		 3052 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3053 if (bpr > 255)
3054 bpr = 255;
1da177e4 3055
02f1175c
JS		 3056 info->tbpr = info->rbpr = bpr;
3057 info->tco = info->rco = co;
1da177e4
LT		 3058}
3059
3060/*
3061 * This routine finds or computes the various line characteristics.
3062 * It used to be called config_setup
3063 */
02f1175c 3064static void set_line_char(struct cyclades_port *info)
1da177e4 3065{
02f1175c
JS		 3066 unsigned long flags;
3067 void __iomem *base_addr;
3068 int card, chip, channel, index;
3069 unsigned cflag, iflag;
3070 unsigned short chip_number;
3071 int baud, baud_rate = 0;
3072 int i;
3073
3074 if (!info->tty || !info->tty->termios) {
3075 return;
1da177e4 3076 }
02f1175c
JS		 3077 if (info->line == -1) {
3078 return;
1da177e4 3079 }
02f1175c
JS		 3080 cflag = info->tty->termios->c_cflag;
3081 iflag = info->tty->termios->c_iflag;
1da177e4 3082
02f1175c
JS		 3083 /*
3084 * Set up the tty->alt_speed kludge
3085 */
3086 if (info->tty) {
3087 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3088 info->tty->alt_speed = 57600;
3089 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3090 info->tty->alt_speed = 115200;
3091 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3092 info->tty->alt_speed = 230400;
3093 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3094 info->tty->alt_speed = 460800;
1da177e4 3095 }
02f1175c
JS		 3096
3097 card = info->card;
3098 channel = (info->line) - (cy_card[card].first_line);
3099 chip_number = channel / 4;
3100
3101 if (!IS_CYC_Z(cy_card[card])) {
3102
3103 index = cy_card[card].bus_index;
3104
3105 /* baud rate */
3106 baud = tty_get_baud_rate(info->tty);
3107 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3108 ASYNC_SPD_CUST) {
3109 if (info->custom_divisor)
3110 baud_rate = info->baud / info->custom_divisor;
3111 else
3112 baud_rate = info->baud;
3113 } else if (baud > CD1400_MAX_SPEED) {
3114 baud = CD1400_MAX_SPEED;
3115 }
3116 /* find the baud index */
3117 for (i = 0; i < 20; i++) {
3118 if (baud == baud_table[i]) {
3119 break;
3120 }
3121 }
3122 if (i == 20) {
3123 i = 19; /* CD1400_MAX_SPEED */
3124 }
3125
3126 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3127 ASYNC_SPD_CUST) {
3128 cyy_baud_calc(info, baud_rate);
3129 } else {
3130 if (info->chip_rev >= CD1400_REV_J) {
3131 /* It is a CD1400 rev. J or later */
3132 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3133 info->tco = baud_co_60[i]; /* Tx CO */
3134 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3135 info->rco = baud_co_60[i]; /* Rx CO */
3136 } else {
3137 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3138 info->tco = baud_co_25[i]; /* Tx CO */
3139 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3140 info->rco = baud_co_25[i]; /* Rx CO */
3141 }
3142 }
3143 if (baud_table[i] == 134) {
3144 /* get it right for 134.5 baud */
3145 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3146 2;
3147 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3148 ASYNC_SPD_CUST) {
3149 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3150 baud_rate) + 2;
3151 } else if (baud_table[i]) {
3152 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3153 baud_table[i]) + 2;
3154 /* this needs to be propagated into the card info */
3155 } else {
3156 info->timeout = 0;
3157 }
3158 /* By tradition (is it a standard?) a baud rate of zero
3159 implies the line should be/has been closed. A bit
3160 later in this routine such a test is performed. */
3161
3162 /* byte size and parity */
3163 info->cor5 = 0;
3164 info->cor4 = 0;
3165 /* receive threshold */
3166 info->cor3 = (info->default_threshold ?
3167 info->default_threshold : baud_cor3[i]);
3168 info->cor2 = CyETC;
3169 switch (cflag & CSIZE) {
3170 case CS5:
3171 info->cor1 = Cy_5_BITS;
3172 break;
3173 case CS6:
3174 info->cor1 = Cy_6_BITS;
3175 break;
3176 case CS7:
3177 info->cor1 = Cy_7_BITS;
3178 break;
3179 case CS8:
3180 info->cor1 = Cy_8_BITS;
3181 break;
3182 }
3183 if (cflag & CSTOPB) {
3184 info->cor1 |= Cy_2_STOP;
3185 }
3186 if (cflag & PARENB) {
3187 if (cflag & PARODD) {
3188 info->cor1 |= CyPARITY_O;
3189 } else {
3190 info->cor1 |= CyPARITY_E;
3191 }
3192 } else {
3193 info->cor1 |= CyPARITY_NONE;
3194 }
3195
3196 /* CTS flow control flag */
3197 if (cflag & CRTSCTS) {
3198 info->flags |= ASYNC_CTS_FLOW;
3199 info->cor2 |= CyCtsAE;
3200 } else {
3201 info->flags &= ~ASYNC_CTS_FLOW;
3202 info->cor2 &= ~CyCtsAE;
3203 }
3204 if (cflag & CLOCAL)
3205 info->flags &= ~ASYNC_CHECK_CD;
3206 else
3207 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3208
3209 /***********************************************
3210 The hardware option, CyRtsAO, presents RTS when
3211 the chip has characters to send. Since most modems
3212 use RTS as reverse (inbound) flow control, this
3213 option is not used. If inbound flow control is
3214 necessary, DTR can be programmed to provide the
3215 appropriate signals for use with a non-standard
3216 cable. Contact Marcio Saito for details.
3217 ***********************************************/
3218
02f1175c
JS		 3219 chip = channel >> 2;
3220 channel &= 0x03;
3221 base_addr = cy_card[card].base_addr +
3222 (cy_chip_offset[chip] << index);
1da177e4 3223
02f1175c
JS		 3224 CY_LOCK(info, flags);
3225 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3226
3227 /* tx and rx baud rate */
3228
3229 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3230 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3231 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3232 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3233
3234 /* set line characteristics according configuration */
3235
3236 cy_writeb(base_addr + (CySCHR1 << index),
3237 START_CHAR(info->tty));
3238 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3239 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3240 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3241 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3242 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3243 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3244
3245 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3246 CyCOR3ch, index);
3247
3248 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3249 cy_writeb(base_addr + (CyRTPR << index),
3250 (info->default_timeout ? info->default_timeout : 0x02));
3251 /* 10ms rx timeout */
3252
3253 if (C_CLOCAL(info->tty)) {
3254 /* without modem intr */
3255 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3256 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3257 /* act on 1->0 modem transitions */
3258 if ((cflag & CRTSCTS) && info->rflow) {
3259 cy_writeb(base_addr + (CyMCOR1 << index),
3260 (CyCTS | rflow_thr[i]));
3261 } else {
3262 cy_writeb(base_addr + (CyMCOR1 << index),
3263 CyCTS);
3264 }
3265 /* act on 0->1 modem transitions */
3266 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3267 } else {
02f1175c
JS		 3268 /* without modem intr */
3269 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3270 readb(base_addr +
02f1175c
JS		 3271 (CySRER << index)) | CyMdmCh);
3272 /* act on 1->0 modem transitions */
3273 if ((cflag & CRTSCTS) && info->rflow) {
3274 cy_writeb(base_addr + (CyMCOR1 << index),
3275 (CyDSR | CyCTS | CyRI | CyDCD |
3276 rflow_thr[i]));
3277 } else {
3278 cy_writeb(base_addr + (CyMCOR1 << index),
3279 CyDSR | CyCTS | CyRI | CyDCD);
3280 }
3281 /* act on 0->1 modem transitions */
3282 cy_writeb(base_addr + (CyMCOR2 << index),
3283 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3284 }
02f1175c
JS		 3285
3286 if (i == 0) { /* baud rate is zero, turn off line */
3287 if (info->rtsdtr_inv) {
3288 cy_writeb(base_addr + (CyMSVR1 << index),
3289 ~CyRTS);
3290 } else {
3291 cy_writeb(base_addr + (CyMSVR2 << index),
3292 ~CyDTR);
3293 }
1da177e4 3294#ifdef CY_DEBUG_DTR
02f1175c
JS		 3295 printk("cyc:set_line_char dropping DTR\n");
3296 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3297 readb(base_addr + (CyMSVR1 << index)),
3298 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3299#endif
02f1175c
JS		 3300 } else {
3301 if (info->rtsdtr_inv) {
3302 cy_writeb(base_addr + (CyMSVR1 << index),
3303 CyRTS);
3304 } else {
3305 cy_writeb(base_addr + (CyMSVR2 << index),
3306 CyDTR);
3307 }
1da177e4 3308#ifdef CY_DEBUG_DTR
02f1175c
JS		 3309 printk("cyc:set_line_char raising DTR\n");
3310 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3311 readb(base_addr + (CyMSVR1 << index)),
3312 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3313#endif
02f1175c 3314 }
1da177e4 3315
02f1175c
JS		 3316 if (info->tty) {
3317 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3318 }
3319 CY_UNLOCK(info, flags);
1da177e4 3320
1da177e4 3321 } else {
02f1175c
JS		 3322 struct FIRM_ID __iomem *firm_id;
3323 struct ZFW_CTRL __iomem *zfw_ctrl;
3324 struct BOARD_CTRL __iomem *board_ctrl;
3325 struct CH_CTRL __iomem *ch_ctrl;
3326 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3327 __u32 sw_flow;
02f1175c 3328 int retval;
1da177e4 3329
02f1175c
JS		 3330 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3331 if (!ISZLOADED(cy_card[card])) {
3332 return;
3333 }
1da177e4 3334
02f1175c 3335 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3336 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3337 board_ctrl = &zfw_ctrl->board_ctrl;
3338 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3339 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3340
3341 /* baud rate */
3342 baud = tty_get_baud_rate(info->tty);
3343 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3344 ASYNC_SPD_CUST) {
3345 if (info->custom_divisor)
3346 baud_rate = info->baud / info->custom_divisor;
3347 else
3348 baud_rate = info->baud;
3349 } else if (baud > CYZ_MAX_SPEED) {
3350 baud = CYZ_MAX_SPEED;
3351 }
3352 cy_writel(&ch_ctrl->comm_baud, baud);
3353
3354 if (baud == 134) {
3355 /* get it right for 134.5 baud */
3356 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3357 2;
3358 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3359 ASYNC_SPD_CUST) {
3360 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3361 baud_rate) + 2;
3362 } else if (baud) {
3363 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3364 baud) + 2;
3365 /* this needs to be propagated into the card info */
3366 } else {
3367 info->timeout = 0;
3368 }
1da177e4 3369
02f1175c
JS		 3370 /* byte size and parity */
3371 switch (cflag & CSIZE) {
3372 case CS5:
3373 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3374 break;
3375 case CS6:
3376 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3377 break;
3378 case CS7:
3379 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3380 break;
3381 case CS8:
3382 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3383 break;
3384 }
3385 if (cflag & CSTOPB) {
3386 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3387 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3388 } else {
3389 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3390 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3391 }
3392 if (cflag & PARENB) {
3393 if (cflag & PARODD) {
3394 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3395 } else {
3396 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3397 }
3398 } else {
3399 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3400 }
1da177e4 3401
02f1175c
JS		 3402 /* CTS flow control flag */
3403 if (cflag & CRTSCTS) {
3404 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3405 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3406 } else {
db05c3b1
JS		 3407 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3408 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3409 }
3410 /* As the HW flow control is done in firmware, the driver
3411 doesn't need to care about it */
3412 info->flags &= ~ASYNC_CTS_FLOW;
3413
3414 /* XON/XOFF/XANY flow control flags */
3415 sw_flow = 0;
3416 if (iflag & IXON) {
3417 sw_flow |= C_FL_OXX;
3418 if (iflag & IXANY)
3419 sw_flow |= C_FL_OIXANY;
3420 }
3421 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3422
3423 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3424 if (retval != 0) {
3425 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3426 info->line, retval);
3427 }
3428
3429 /* CD sensitivity */
3430 if (cflag & CLOCAL) {
3431 info->flags &= ~ASYNC_CHECK_CD;
3432 } else {
3433 info->flags |= ASYNC_CHECK_CD;
3434 }
1da177e4 3435
02f1175c
JS		 3436 if (baud == 0) { /* baud rate is zero, turn off line */
3437 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3438 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3439#ifdef CY_DEBUG_DTR
02f1175c 3440 printk("cyc:set_line_char dropping Z DTR\n");
1da177e4 3441#endif
02f1175c
JS		 3442 } else {
3443 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3444 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3445#ifdef CY_DEBUG_DTR
02f1175c 3446 printk("cyc:set_line_char raising Z DTR\n");
1da177e4 3447#endif
02f1175c 3448 }
1da177e4 3449
02f1175c
JS		 3450 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3451 if (retval != 0) {
3452 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3453 info->line, retval);
3454 }
1da177e4 3455
02f1175c
JS		 3456 if (info->tty) {
3457 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3458 }
1da177e4 3459 }
02f1175c 3460} /* set_line_char */
1da177e4
LT		 3461
3462static int
02f1175c
JS		 3463get_serial_info(struct cyclades_port *info,
3464 struct serial_struct __user * retinfo)
1da177e4 3465{
02f1175c
JS		 3466 struct serial_struct tmp;
3467 struct cyclades_card *cinfo = &cy_card[info->card];
1da177e4 3468
02f1175c
JS		 3469 if (!retinfo)
3470 return -EFAULT;
3471 memset(&tmp, 0, sizeof(tmp));
3472 tmp.type = info->type;
3473 tmp.line = info->line;
3474 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3475 tmp.irq = cinfo->irq;
3476 tmp.flags = info->flags;
3477 tmp.close_delay = info->close_delay;
d5dedf99 3478 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3479 tmp.baud_base = info->baud;
3480 tmp.custom_divisor = info->custom_divisor;
3481 tmp.hub6 = 0; /*!!! */
3482 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3483} /* get_serial_info */
1da177e4
LT		 3484
3485static int
02f1175c
JS		 3486set_serial_info(struct cyclades_port *info,
3487 struct serial_struct __user * new_info)
1da177e4 3488{
02f1175c
JS		 3489 struct serial_struct new_serial;
3490 struct cyclades_port old_info;
3491
3492 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3493 return -EFAULT;
3494 old_info = *info;
3495
3496 if (!capable(CAP_SYS_ADMIN)) {
3497 if (new_serial.close_delay != info->close_delay ||
3498 new_serial.baud_base != info->baud ||
3499 (new_serial.flags & ASYNC_FLAGS &
3500 ~ASYNC_USR_MASK) !=
3501 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3502 return -EPERM;
3503 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3504 (new_serial.flags & ASYNC_USR_MASK);
3505 info->baud = new_serial.baud_base;
3506 info->custom_divisor = new_serial.custom_divisor;
3507 goto check_and_exit;
3508 }
3509
3510 /*
3511 * OK, past this point, all the error checking has been done.
3512 * At this point, we start making changes.....
3513 */
3514
3515 info->baud = new_serial.baud_base;
3516 info->custom_divisor = new_serial.custom_divisor;
3517 info->flags = (info->flags & ~ASYNC_FLAGS) |
3518 (new_serial.flags & ASYNC_FLAGS);
3519 info->close_delay = new_serial.close_delay * HZ / 100;
3520 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3521
3522check_and_exit:
02f1175c
JS		 3523 if (info->flags & ASYNC_INITIALIZED) {
3524 set_line_char(info);
3525 return 0;
3526 } else {
3527 return startup(info);
3528 }
3529} /* set_serial_info */
1da177e4
LT		 3530
3531/*
3532 * get_lsr_info - get line status register info
3533 *
3534 * Purpose: Let user call ioctl() to get info when the UART physically
3535 * is emptied. On bus types like RS485, the transmitter must
3536 * release the bus after transmitting. This must be done when
3537 * the transmit shift register is empty, not be done when the
3538 * transmit holding register is empty. This functionality
3539 * allows an RS485 driver to be written in user space.
3540 */
02f1175c 3541static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3542{
02f1175c
JS		 3543 int card, chip, channel, index;
3544 unsigned char status;
3545 unsigned int result;
3546 unsigned long flags;
3547 void __iomem *base_addr;
1da177e4 3548
02f1175c
JS		 3549 card = info->card;
3550 channel = (info->line) - (cy_card[card].first_line);
3551 if (!IS_CYC_Z(cy_card[card])) {
3552 chip = channel >> 2;
3553 channel &= 0x03;
3554 index = cy_card[card].bus_index;
3555 base_addr =
3556 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3557
3558 CY_LOCK(info, flags);
db05c3b1 3559 status = readb(base_addr + (CySRER << index)) &
02f1175c
JS		 3560 (CyTxRdy | CyTxMpty);
3561 CY_UNLOCK(info, flags);
3562 result = (status ? 0 : TIOCSER_TEMT);
3563 } else {
3564 /* Not supported yet */
3565 return -EINVAL;
3566 }
3567 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3568}
3569
02f1175c 3570static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3571{
cab9bdd1 3572 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3573 int card, chip, channel, index;
3574 void __iomem *base_addr;
3575 unsigned long flags;
3576 unsigned char status;
3577 unsigned long lstatus;
3578 unsigned int result;
3579 struct FIRM_ID __iomem *firm_id;
3580 struct ZFW_CTRL __iomem *zfw_ctrl;
3581 struct BOARD_CTRL __iomem *board_ctrl;
3582 struct CH_CTRL __iomem *ch_ctrl;
3583
3584 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3585 return -ENODEV;
1da177e4 3586
02f1175c
JS		 3587 card = info->card;
3588 channel = (info->line) - (cy_card[card].first_line);
3589 if (!IS_CYC_Z(cy_card[card])) {
3590 chip = channel >> 2;
3591 channel &= 0x03;
3592 index = cy_card[card].bus_index;
3593 base_addr =
3594 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3595
02f1175c
JS		 3596 CY_LOCK(info, flags);
3597 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3598 status = readb(base_addr + (CyMSVR1 << index));
3599 status |= readb(base_addr + (CyMSVR2 << index));
02f1175c
JS		 3600 CY_UNLOCK(info, flags);
3601
3602 if (info->rtsdtr_inv) {
3603 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3604 ((status & CyDTR) ? TIOCM_RTS : 0);
3605 } else {
3606 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3607 ((status & CyDTR) ? TIOCM_DTR : 0);
3608 }
3609 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3610 ((status & CyRI) ? TIOCM_RNG : 0) |
3611 ((status & CyDSR) ? TIOCM_DSR : 0) |
3612 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3613 } else {
02f1175c 3614 base_addr = cy_card[card].base_addr;
1da177e4 3615
02f1175c
JS		 3616 if (cy_card[card].num_chips != -1) {
3617 return -EINVAL;
3618 }
1da177e4 3619
02f1175c
JS		 3620 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3621 if (ISZLOADED(cy_card[card])) {
3622 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3623 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3624 board_ctrl = &zfw_ctrl->board_ctrl;
3625 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3626 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3627 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3628 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3629 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3630 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3631 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3632 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3633 } else {
3634 result = 0;
3635 return -ENODEV;
3636 }
1da177e4 3637
02f1175c
JS		 3638 }
3639 return result;
3640} /* cy_tiomget */
1da177e4
LT		 3641
3642static int
3643cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3644 unsigned int set, unsigned int clear)
1da177e4 3645{
cab9bdd1 3646 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3647 int card, chip, channel, index;
3648 void __iomem *base_addr;
3649 unsigned long flags;
3650 struct FIRM_ID __iomem *firm_id;
3651 struct ZFW_CTRL __iomem *zfw_ctrl;
3652 struct BOARD_CTRL __iomem *board_ctrl;
3653 struct CH_CTRL __iomem *ch_ctrl;
3654 int retval;
3655
3656 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3657 return -ENODEV;
3658
3659 card = info->card;
3660 channel = (info->line) - (cy_card[card].first_line);
3661 if (!IS_CYC_Z(cy_card[card])) {
3662 chip = channel >> 2;
3663 channel &= 0x03;
3664 index = cy_card[card].bus_index;
3665 base_addr =
3666 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3667
3668 if (set & TIOCM_RTS) {
3669 CY_LOCK(info, flags);
3670 cy_writeb(base_addr + (CyCAR << index),
3671 (u_char) channel);
3672 if (info->rtsdtr_inv) {
3673 cy_writeb(base_addr + (CyMSVR2 << index),
3674 CyDTR);
3675 } else {
3676 cy_writeb(base_addr + (CyMSVR1 << index),
3677 CyRTS);
3678 }
3679 CY_UNLOCK(info, flags);
3680 }
3681 if (clear & TIOCM_RTS) {
3682 CY_LOCK(info, flags);
3683 cy_writeb(base_addr + (CyCAR << index),
3684 (u_char) channel);
3685 if (info->rtsdtr_inv) {
3686 cy_writeb(base_addr + (CyMSVR2 << index),
3687 ~CyDTR);
3688 } else {
3689 cy_writeb(base_addr + (CyMSVR1 << index),
3690 ~CyRTS);
3691 }
3692 CY_UNLOCK(info, flags);
3693 }
3694 if (set & TIOCM_DTR) {
3695 CY_LOCK(info, flags);
3696 cy_writeb(base_addr + (CyCAR << index),
3697 (u_char) channel);
3698 if (info->rtsdtr_inv) {
3699 cy_writeb(base_addr + (CyMSVR1 << index),
3700 CyRTS);
3701 } else {
3702 cy_writeb(base_addr + (CyMSVR2 << index),
3703 CyDTR);
3704 }
1da177e4 3705#ifdef CY_DEBUG_DTR
02f1175c
JS		 3706 printk("cyc:set_modem_info raising DTR\n");
3707 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3708 readb(base_addr + (CyMSVR1 << index)),
3709 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3710#endif
02f1175c
JS		 3711 CY_UNLOCK(info, flags);
3712 }
3713 if (clear & TIOCM_DTR) {
3714 CY_LOCK(info, flags);
3715 cy_writeb(base_addr + (CyCAR << index),
3716 (u_char) channel);
3717 if (info->rtsdtr_inv) {
3718 cy_writeb(base_addr + (CyMSVR1 << index),
3719 ~CyRTS);
3720 } else {
3721 cy_writeb(base_addr + (CyMSVR2 << index),
3722 ~CyDTR);
3723 }
1da177e4
LT		 3724
3725#ifdef CY_DEBUG_DTR
02f1175c
JS		 3726 printk("cyc:set_modem_info dropping DTR\n");
3727 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3728 readb(base_addr + (CyMSVR1 << index)),
3729 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3730#endif
02f1175c
JS		 3731 CY_UNLOCK(info, flags);
3732 }
3733 } else {
3734 base_addr = cy_card[card].base_addr;
3735
3736 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3737 if (ISZLOADED(cy_card[card])) {
3738 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3739 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3740 board_ctrl = &zfw_ctrl->board_ctrl;
3741 ch_ctrl = zfw_ctrl->ch_ctrl;
3742
3743 if (set & TIOCM_RTS) {
3744 CY_LOCK(info, flags);
3745 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3746 readl(&ch_ctrl[channel].rs_control) |
3747 C_RS_RTS);
02f1175c
JS		 3748 CY_UNLOCK(info, flags);
3749 }
3750 if (clear & TIOCM_RTS) {
3751 CY_LOCK(info, flags);
3752 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3753 readl(&ch_ctrl[channel].rs_control) &
3754 ~C_RS_RTS);
02f1175c
JS		 3755 CY_UNLOCK(info, flags);
3756 }
3757 if (set & TIOCM_DTR) {
3758 CY_LOCK(info, flags);
3759 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3760 readl(&ch_ctrl[channel].rs_control) |
3761 C_RS_DTR);
1da177e4 3762#ifdef CY_DEBUG_DTR
02f1175c 3763 printk("cyc:set_modem_info raising Z DTR\n");
1da177e4 3764#endif
02f1175c
JS		 3765 CY_UNLOCK(info, flags);
3766 }
3767 if (clear & TIOCM_DTR) {
3768 CY_LOCK(info, flags);
3769 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3770 readl(&ch_ctrl[channel].rs_control) &
3771 ~C_RS_DTR);
1da177e4 3772#ifdef CY_DEBUG_DTR
02f1175c 3773 printk("cyc:set_modem_info clearing Z DTR\n");
1da177e4 3774#endif
02f1175c
JS		 3775 CY_UNLOCK(info, flags);
3776 }
3777 } else {
3778 return -ENODEV;
3779 }
3780 CY_LOCK(info, flags);
3781 retval = cyz_issue_cmd(&cy_card[info->card],
3782 channel, C_CM_IOCTLM, 0L);
3783 if (retval != 0) {
3784 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3785 info->line, retval);
3786 }
3787 CY_UNLOCK(info, flags);
1da177e4 3788 }
02f1175c
JS		 3789 return 0;
3790} /* cy_tiocmset */
1da177e4
LT		 3791
3792/*
3793 * cy_break() --- routine which turns the break handling on or off
3794 */
02f1175c 3795static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3796{
cab9bdd1 3797 struct cyclades_port *info = tty->driver_data;
02f1175c 3798 unsigned long flags;
1da177e4 3799
02f1175c
JS		 3800 if (serial_paranoia_check(info, tty->name, "cy_break"))
3801 return;
1da177e4 3802
02f1175c
JS		 3803 CY_LOCK(info, flags);
3804 if (!IS_CYC_Z(cy_card[info->card])) {
3805 /* Let the transmit ISR take care of this (since it
3806 requires stuffing characters into the output stream).
3807 */
3808 if (break_state == -1) {
3809 if (!info->breakon) {
3810 info->breakon = 1;
3811 if (!info->xmit_cnt) {
3812 CY_UNLOCK(info, flags);
3813 start_xmit(info);
3814 CY_LOCK(info, flags);
3815 }
3816 }
3817 } else {
3818 if (!info->breakoff) {
3819 info->breakoff = 1;
3820 if (!info->xmit_cnt) {
3821 CY_UNLOCK(info, flags);
3822 start_xmit(info);
3823 CY_LOCK(info, flags);
3824 }
3825 }
1da177e4 3826 }
1da177e4 3827 } else {
02f1175c
JS		 3828 int retval;
3829
3830 if (break_state == -1) {
3831 retval = cyz_issue_cmd(&cy_card[info->card],
3832 info->line - cy_card[info->card].first_line,
3833 C_CM_SET_BREAK, 0L);
3834 if (retval != 0) {
3835 printk("cyc:cy_break (set) retval on ttyC%d "
3836 "was %x\n", info->line, retval);
3837 }
3838 } else {
3839 retval = cyz_issue_cmd(&cy_card[info->card],
3840 info->line - cy_card[info->card].first_line,
3841 C_CM_CLR_BREAK, 0L);
3842 if (retval != 0) {
3843 printk("cyc:cy_break (clr) retval on ttyC%d "
3844 "was %x\n", info->line, retval);
3845 }
1da177e4 3846 }
1da177e4 3847 }
02f1175c
JS		 3848 CY_UNLOCK(info, flags);
3849} /* cy_break */
1da177e4
LT		 3850
3851static int
02f1175c 3852get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3853{
3854
02f1175c
JS		 3855 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3856 return -EFAULT;
3857 info->mon.int_count = 0;
3858 info->mon.char_count = 0;
3859 info->mon.char_max = 0;
3860 info->mon.char_last = 0;
3861 return 0;
3862} /* get_mon_info */
1da177e4 3863
02f1175c 3864static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3865{
02f1175c
JS		 3866 void __iomem *base_addr;
3867 int card, channel, chip, index;
3868 unsigned long flags;
1da177e4 3869
02f1175c
JS		 3870 card = info->card;
3871 channel = info->line - cy_card[card].first_line;
3872 if (!IS_CYC_Z(cy_card[card])) {
3873 chip = channel >> 2;
3874 channel &= 0x03;
3875 index = cy_card[card].bus_index;
3876 base_addr =
3877 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3878
3879 info->cor3 &= ~CyREC_FIFO;
3880 info->cor3 |= value & CyREC_FIFO;
1da177e4 3881
02f1175c
JS		 3882 CY_LOCK(info, flags);
3883 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3884 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3885 CY_UNLOCK(info, flags);
3886 } else {
096dcfce 3887 /* Nothing to do! */
02f1175c
JS		 3888 }
3889 return 0;
3890} /* set_threshold */
1da177e4
LT		 3891
3892static int
02f1175c 3893get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3894{
02f1175c
JS		 3895 void __iomem *base_addr;
3896 int card, channel, chip, index;
3897 unsigned long tmp;
1da177e4 3898
02f1175c
JS		 3899 card = info->card;
3900 channel = info->line - cy_card[card].first_line;
3901 if (!IS_CYC_Z(cy_card[card])) {
3902 chip = channel >> 2;
3903 channel &= 0x03;
3904 index = cy_card[card].bus_index;
3905 base_addr =
3906 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3907
db05c3b1 3908 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c
JS		 3909 return put_user(tmp, value);
3910 } else {
096dcfce 3911 /* Nothing to do! */
02f1175c
JS		 3912 return 0;
3913 }
3914} /* get_threshold */
1da177e4
LT		 3915
3916static int
02f1175c 3917set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3918{
02f1175c
JS		 3919 info->default_threshold = value & 0x0f;
3920 return 0;
3921} /* set_default_threshold */
1da177e4
LT		 3922
3923static int
02f1175c 3924get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3925{
02f1175c
JS		 3926 return put_user(info->default_threshold, value);
3927} /* get_default_threshold */
1da177e4 3928
02f1175c 3929static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3930{
02f1175c
JS		 3931 void __iomem *base_addr;
3932 int card, channel, chip, index;
3933 unsigned long flags;
1da177e4 3934
02f1175c
JS		 3935 card = info->card;
3936 channel = info->line - cy_card[card].first_line;
3937 if (!IS_CYC_Z(cy_card[card])) {
3938 chip = channel >> 2;
3939 channel &= 0x03;
3940 index = cy_card[card].bus_index;
3941 base_addr =
3942 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3943
02f1175c
JS		 3944 CY_LOCK(info, flags);
3945 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3946 CY_UNLOCK(info, flags);
3947 } else {
096dcfce 3948 /* Nothing to do! */
02f1175c
JS		 3949 }
3950 return 0;
3951} /* set_timeout */
1da177e4 3952
02f1175c 3953static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3954{
02f1175c
JS		 3955 void __iomem *base_addr;
3956 int card, channel, chip, index;
3957 unsigned long tmp;
1da177e4 3958
02f1175c
JS		 3959 card = info->card;
3960 channel = info->line - cy_card[card].first_line;
3961 if (!IS_CYC_Z(cy_card[card])) {
3962 chip = channel >> 2;
3963 channel &= 0x03;
3964 index = cy_card[card].bus_index;
3965 base_addr =
3966 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3967
db05c3b1 3968 tmp = readb(base_addr + (CyRTPR << index));
02f1175c
JS		 3969 return put_user(tmp, value);
3970 } else {
096dcfce 3971 /* Nothing to do! */
02f1175c
JS		 3972 return 0;
3973 }
3974} /* get_timeout */
1da177e4 3975
02f1175c 3976static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3977{
02f1175c
JS		 3978 info->default_timeout = value & 0xff;
3979 return 0;
3980} /* set_default_timeout */
1da177e4
LT		 3981
3982static int
02f1175c 3983get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3984{
02f1175c
JS		 3985 return put_user(info->default_timeout, value);
3986} /* get_default_timeout */
1da177e4
LT		 3987
3988/*
3989 * This routine allows the tty driver to implement device-
3990 * specific ioctl's. If the ioctl number passed in cmd is
3991 * not recognized by the driver, it should return ENOIOCTLCMD.
3992 */
3993static int
02f1175c
JS		 3994cy_ioctl(struct tty_struct *tty, struct file *file,
3995 unsigned int cmd, unsigned long arg)
1da177e4 3996{
cab9bdd1 3997 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3998 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3999 struct serial_icounter_struct __user *p_cuser; /* user space */
4000 int ret_val = 0;
4001 unsigned long flags;
4002 void __user *argp = (void __user *)arg;
4003
4004 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4005 return -ENODEV;
1da177e4
LT		 4006
4007#ifdef CY_DEBUG_OTHER
02f1175c 4008 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
1da177e4
LT		 4009#endif
4010
02f1175c
JS		 4011 switch (cmd) {
4012 case CYGETMON:
4013 ret_val = get_mon_info(info, argp);
4014 break;
4015 case CYGETTHRESH:
4016 ret_val = get_threshold(info, argp);
4017 break;
4018 case CYSETTHRESH:
4019 ret_val = set_threshold(info, arg);
4020 break;
4021 case CYGETDEFTHRESH:
4022 ret_val = get_default_threshold(info, argp);
4023 break;
4024 case CYSETDEFTHRESH:
4025 ret_val = set_default_threshold(info, arg);
4026 break;
4027 case CYGETTIMEOUT:
4028 ret_val = get_timeout(info, argp);
4029 break;
4030 case CYSETTIMEOUT:
4031 ret_val = set_timeout(info, arg);
4032 break;
4033 case CYGETDEFTIMEOUT:
4034 ret_val = get_default_timeout(info, argp);
4035 break;
4036 case CYSETDEFTIMEOUT:
4037 ret_val = set_default_timeout(info, arg);
4038 break;
1da177e4 4039 case CYSETRFLOW:
02f1175c
JS		 4040 info->rflow = (int)arg;
4041 ret_val = 0;
4042 break;
1da177e4 4043 case CYGETRFLOW:
02f1175c
JS		 4044 ret_val = info->rflow;
4045 break;
1da177e4 4046 case CYSETRTSDTR_INV:
02f1175c
JS		 4047 info->rtsdtr_inv = (int)arg;
4048 ret_val = 0;
4049 break;
1da177e4 4050 case CYGETRTSDTR_INV:
02f1175c
JS		 4051 ret_val = info->rtsdtr_inv;
4052 break;
1da177e4 4053 case CYGETCARDINFO:
02f1175c
JS		 4054 if (copy_to_user(argp, &cy_card[info->card],
4055 sizeof(struct cyclades_card))) {
4056 ret_val = -EFAULT;
4057 break;
4058 }
4059 ret_val = 0;
1da177e4 4060 break;
1da177e4 4061 case CYGETCD1400VER:
02f1175c
JS		 4062 ret_val = info->chip_rev;
4063 break;
1da177e4
LT		 4064#ifndef CONFIG_CYZ_INTR
4065 case CYZSETPOLLCYCLE:
02f1175c
JS		 4066 cyz_polling_cycle = (arg * HZ) / 1000;
4067 ret_val = 0;
4068 break;
1da177e4 4069 case CYZGETPOLLCYCLE:
02f1175c
JS		 4070 ret_val = (cyz_polling_cycle * 1000) / HZ;
4071 break;
4072#endif /* CONFIG_CYZ_INTR */
1da177e4 4073 case CYSETWAIT:
02f1175c
JS		 4074 info->closing_wait = (unsigned short)arg *HZ / 100;
4075 ret_val = 0;
4076 break;
1da177e4 4077 case CYGETWAIT:
02f1175c
JS		 4078 ret_val = info->closing_wait / (HZ / 100);
4079 break;
4080 case TIOCGSERIAL:
4081 ret_val = get_serial_info(info, argp);
4082 break;
4083 case TIOCSSERIAL:
4084 ret_val = set_serial_info(info, argp);
4085 break;
4086 case TIOCSERGETLSR: /* Get line status register */
4087 ret_val = get_lsr_info(info, argp);
4088 break;
4089 /*
4090 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4091 * - mask passed in arg for lines of interest
4092 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4093 * Caller should use TIOCGICOUNT to see which one it was
4094 */
1da177e4 4095 case TIOCMIWAIT:
1da177e4 4096 CY_LOCK(info, flags);
02f1175c
JS		 4097 /* note the counters on entry */
4098 cprev = info->icount;
1da177e4 4099 CY_UNLOCK(info, flags);
02f1175c
JS		 4100 while (1) {
4101 interruptible_sleep_on(&info->delta_msr_wait);
4102 /* see if a signal did it */
4103 if (signal_pending(current)) {
4104 return -ERESTARTSYS;
4105 }
1da177e4 4106
02f1175c
JS		 4107 CY_LOCK(info, flags);
4108 cnow = info->icount; /* atomic copy */
4109 CY_UNLOCK(info, flags);
4110
4111 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4112 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4113 return -EIO; /* no change => error */
4114 }
4115 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4116 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4117 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4118 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4119 return 0;
4120 }
4121 cprev = cnow;
1da177e4 4122 }
02f1175c 4123 /* NOTREACHED */
1da177e4 4124
02f1175c
JS		 4125 /*
4126 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4127 * Return: write counters to the user passed counter struct
4128 * NB: both 1->0 and 0->1 transitions are counted except for
4129 * RI where only 0->1 is counted.
4130 */
1da177e4 4131 case TIOCGICOUNT:
02f1175c
JS		 4132 CY_LOCK(info, flags);
4133 cnow = info->icount;
4134 CY_UNLOCK(info, flags);
4135 p_cuser = argp;
4136 ret_val = put_user(cnow.cts, &p_cuser->cts);
4137 if (ret_val)
4138 return ret_val;
4139 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4140 if (ret_val)
4141 return ret_val;
4142 ret_val = put_user(cnow.rng, &p_cuser->rng);
4143 if (ret_val)
4144 return ret_val;
4145 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4146 if (ret_val)
4147 return ret_val;
4148 ret_val = put_user(cnow.rx, &p_cuser->rx);
4149 if (ret_val)
4150 return ret_val;
4151 ret_val = put_user(cnow.tx, &p_cuser->tx);
4152 if (ret_val)
4153 return ret_val;
4154 ret_val = put_user(cnow.frame, &p_cuser->frame);
4155 if (ret_val)
4156 return ret_val;
4157 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4158 if (ret_val)
4159 return ret_val;
4160 ret_val = put_user(cnow.parity, &p_cuser->parity);
4161 if (ret_val)
4162 return ret_val;
4163 ret_val = put_user(cnow.brk, &p_cuser->brk);
4164 if (ret_val)
4165 return ret_val;
4166 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4167 if (ret_val)
4168 return ret_val;
4169 ret_val = 0;
4170 break;
4171 default:
4172 ret_val = -ENOIOCTLCMD;
4173 }
1da177e4
LT		 4174
4175#ifdef CY_DEBUG_OTHER
02f1175c 4176 printk(" cyc:cy_ioctl done\n");
1da177e4
LT		 4177#endif
4178
02f1175c
JS		 4179 return ret_val;
4180} /* cy_ioctl */
1da177e4
LT		 4181
4182/*
4183 * This routine allows the tty driver to be notified when
4184 * device's termios settings have changed. Note that a
4185 * well-designed tty driver should be prepared to accept the case
4186 * where old == NULL, and try to do something rational.
4187 */
02f1175c 4188static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4189{
cab9bdd1 4190 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4191
4192#ifdef CY_DEBUG_OTHER
02f1175c 4193 printk("cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4194#endif
4195
02f1175c
JS		 4196 if (tty->termios->c_cflag == old_termios->c_cflag &&
4197 (tty->termios->c_iflag & (IXON | IXANY)) ==
4198 (old_termios->c_iflag & (IXON | IXANY)))
4199 return;
4200 set_line_char(info);
4201
4202 if ((old_termios->c_cflag & CRTSCTS) &&
4203 !(tty->termios->c_cflag & CRTSCTS)) {
4204 tty->hw_stopped = 0;
4205 cy_start(tty);
4206 }
1da177e4 4207#if 0
02f1175c
JS		 4208 /*
4209 * No need to wake up processes in open wait, since they
4210 * sample the CLOCAL flag once, and don't recheck it.
4211 * XXX It's not clear whether the current behavior is correct
4212 * or not. Hence, this may change.....
4213 */
4214 if (!(old_termios->c_cflag & CLOCAL) &&
4215 (tty->termios->c_cflag & CLOCAL))
4216 wake_up_interruptible(&info->open_wait);
1da177e4 4217#endif
02f1175c 4218} /* cy_set_termios */
1da177e4
LT		 4219
4220/* This function is used to send a high-priority XON/XOFF character to
4221 the device.
4222*/
02f1175c 4223static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4224{
cab9bdd1 4225 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4226 int card, channel;
4227
02f1175c 4228 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4229 return;
4230
02f1175c 4231 info->x_char = ch;
1da177e4
LT		 4232
4233 if (ch)
02f1175c 4234 cy_start(tty);
1da177e4
LT		 4235
4236 card = info->card;
4237 channel = info->line - cy_card[card].first_line;
4238
02f1175c
JS		 4239 if (IS_CYC_Z(cy_card[card])) {
4240 if (ch == STOP_CHAR(tty))
4241 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4242 0L);
4243 else if (ch == START_CHAR(tty))
4244 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4245 0L);
1da177e4
LT		 4246 }
4247}
4248
4249/* This routine is called by the upper-layer tty layer to signal
4250 that incoming characters should be throttled because the input
4251 buffers are close to full.
4252 */
02f1175c 4253static void cy_throttle(struct tty_struct *tty)
1da177e4 4254{
cab9bdd1 4255 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4256 unsigned long flags;
4257 void __iomem *base_addr;
4258 int card, chip, channel, index;
1da177e4
LT		 4259
4260#ifdef CY_DEBUG_THROTTLE
02f1175c 4261 char buf[64];
1da177e4 4262
02f1175c
JS		 4263 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4264 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4265#endif
4266
02f1175c
JS		 4267 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4268 return;
4269 }
4270
4271 card = info->card;
4272
4273 if (I_IXOFF(tty)) {
4274 if (!IS_CYC_Z(cy_card[card]))
4275 cy_send_xchar(tty, STOP_CHAR(tty));
4276 else
4277 info->throttle = 1;
4278 }
1da177e4 4279
02f1175c
JS		 4280 if (tty->termios->c_cflag & CRTSCTS) {
4281 channel = info->line - cy_card[card].first_line;
4282 if (!IS_CYC_Z(cy_card[card])) {
4283 chip = channel >> 2;
4284 channel &= 0x03;
4285 index = cy_card[card].bus_index;
4286 base_addr = cy_card[card].base_addr +
4287 (cy_chip_offset[chip] << index);
4288
4289 CY_LOCK(info, flags);
4290 cy_writeb(base_addr + (CyCAR << index),
4291 (u_char) channel);
4292 if (info->rtsdtr_inv) {
4293 cy_writeb(base_addr + (CyMSVR2 << index),
4294 ~CyDTR);
4295 } else {
4296 cy_writeb(base_addr + (CyMSVR1 << index),
4297 ~CyRTS);
4298 }
4299 CY_UNLOCK(info, flags);
4300 } else {
4301 info->throttle = 1;
4302 }
4303 }
02f1175c 4304} /* cy_throttle */
1da177e4
LT		 4305
4306/*
4307 * This routine notifies the tty driver that it should signal
4308 * that characters can now be sent to the tty without fear of
4309 * overrunning the input buffers of the line disciplines.
4310 */
02f1175c 4311static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4312{
cab9bdd1 4313 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4314 unsigned long flags;
4315 void __iomem *base_addr;
4316 int card, chip, channel, index;
1da177e4
LT		 4317
4318#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4319 char buf[64];
4320
4321 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4322 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4323#endif
4324
02f1175c
JS		 4325 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4326 return;
4327 }
1da177e4 4328
02f1175c
JS		 4329 if (I_IXOFF(tty)) {
4330 if (info->x_char)
4331 info->x_char = 0;
4332 else
4333 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4334 }
1da177e4 4335
02f1175c
JS		 4336 if (tty->termios->c_cflag & CRTSCTS) {
4337 card = info->card;
4338 channel = info->line - cy_card[card].first_line;
4339 if (!IS_CYC_Z(cy_card[card])) {
4340 chip = channel >> 2;
4341 channel &= 0x03;
4342 index = cy_card[card].bus_index;
4343 base_addr = cy_card[card].base_addr +
4344 (cy_chip_offset[chip] << index);
4345
4346 CY_LOCK(info, flags);
4347 cy_writeb(base_addr + (CyCAR << index),
4348 (u_char) channel);
4349 if (info->rtsdtr_inv) {
4350 cy_writeb(base_addr + (CyMSVR2 << index),
4351 CyDTR);
4352 } else {
4353 cy_writeb(base_addr + (CyMSVR1 << index),
4354 CyRTS);
4355 }
4356 CY_UNLOCK(info, flags);
4357 } else {
4358 info->throttle = 0;
4359 }
4360 }
02f1175c 4361} /* cy_unthrottle */
1da177e4
LT		 4362
4363/* cy_start and cy_stop provide software output flow control as a
4364 function of XON/XOFF, software CTS, and other such stuff.
4365*/
02f1175c 4366static void cy_stop(struct tty_struct *tty)
1da177e4 4367{
02f1175c 4368 struct cyclades_card *cinfo;
cab9bdd1 4369 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4370 void __iomem *base_addr;
4371 int chip, channel, index;
4372 unsigned long flags;
1da177e4
LT		 4373
4374#ifdef CY_DEBUG_OTHER
02f1175c 4375 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
1da177e4
LT		 4376#endif
4377
02f1175c
JS		 4378 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4379 return;
1da177e4 4380
02f1175c
JS		 4381 cinfo = &cy_card[info->card];
4382 channel = info->line - cinfo->first_line;
4383 if (!IS_CYC_Z(*cinfo)) {
4384 index = cinfo->bus_index;
4385 chip = channel >> 2;
4386 channel &= 0x03;
4387 base_addr = cy_card[info->card].base_addr +
4388 (cy_chip_offset[chip] << index);
1da177e4 4389
02f1175c
JS		 4390 CY_LOCK(info, flags);
4391 cy_writeb(base_addr + (CyCAR << index),
4392 (u_char)(channel & 0x0003)); /* index channel */
4393 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4394 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 4395 CY_UNLOCK(info, flags);
4396 } else {
096dcfce 4397 /* Nothing to do! */
02f1175c 4398 }
02f1175c 4399} /* cy_stop */
1da177e4 4400
02f1175c 4401static void cy_start(struct tty_struct *tty)
1da177e4 4402{
02f1175c 4403 struct cyclades_card *cinfo;
cab9bdd1 4404 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4405 void __iomem *base_addr;
4406 int chip, channel, index;
4407 unsigned long flags;
1da177e4
LT		 4408
4409#ifdef CY_DEBUG_OTHER
02f1175c 4410 printk("cyc:cy_start ttyC%d\n", info->line); /* */
1da177e4
LT		 4411#endif
4412
02f1175c
JS		 4413 if (serial_paranoia_check(info, tty->name, "cy_start"))
4414 return;
1da177e4 4415
02f1175c
JS		 4416 cinfo = &cy_card[info->card];
4417 channel = info->line - cinfo->first_line;
4418 index = cinfo->bus_index;
4419 if (!IS_CYC_Z(*cinfo)) {
4420 chip = channel >> 2;
4421 channel &= 0x03;
4422 base_addr = cy_card[info->card].base_addr +
4423 (cy_chip_offset[chip] << index);
1da177e4 4424
02f1175c
JS		 4425 CY_LOCK(info, flags);
4426 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4427 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4428 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 4429 CY_UNLOCK(info, flags);
4430 } else {
096dcfce 4431 /* Nothing to do! */
02f1175c 4432 }
02f1175c 4433} /* cy_start */
1da177e4 4434
02f1175c 4435static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4436{
cab9bdd1 4437 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4438 int card, channel, retval;
4439 unsigned long flags;
4440
1da177e4 4441#ifdef CY_DEBUG_IO
02f1175c 4442 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
1da177e4
LT		 4443#endif
4444
02f1175c
JS		 4445 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4446 return;
1da177e4 4447
02f1175c
JS		 4448 card = info->card;
4449 channel = (info->line) - (cy_card[card].first_line);
1da177e4 4450
1da177e4 4451 CY_LOCK(info, flags);
02f1175c 4452 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1da177e4 4453 CY_UNLOCK(info, flags);
1da177e4 4454
02f1175c
JS		 4455 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4456 buffers as well */
4457 CY_LOCK(info, flags);
4458 retval =
4459 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4460 if (retval != 0) {
4461 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4462 info->line, retval);
4463 }
4464 CY_UNLOCK(info, flags);
4465 }
4466 tty_wakeup(tty);
02f1175c 4467} /* cy_flush_buffer */
1da177e4
LT		 4468
4469/*
4470 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4471 */
02f1175c 4472static void cy_hangup(struct tty_struct *tty)
1da177e4 4473{
cab9bdd1 4474 struct cyclades_port *info = tty->driver_data;
02f1175c 4475
1da177e4 4476#ifdef CY_DEBUG_OTHER
02f1175c 4477 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
1da177e4
LT		 4478#endif
4479
02f1175c
JS		 4480 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4481 return;
1da177e4 4482
02f1175c
JS		 4483 cy_flush_buffer(tty);
4484 shutdown(info);
4485 info->event = 0;
4486 info->count = 0;
1da177e4 4487#ifdef CY_DEBUG_COUNT
02f1175c 4488 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
1da177e4 4489#endif
02f1175c
JS		 4490 info->tty = NULL;
4491 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4492 wake_up_interruptible(&info->open_wait);
4493} /* cy_hangup */
1da177e4
LT		 4494
4495/*
4496 * ---------------------------------------------------------------------
4497 * cy_init() and friends
4498 *
4499 * cy_init() is called at boot-time to initialize the serial driver.
4500 * ---------------------------------------------------------------------
4501 */
4502
0809e267
JS		 4503static void __devinit cy_init_card(struct cyclades_card *cinfo,
4504 const unsigned int board)
4505{
4506 struct cyclades_port *info;
4507 u32 mailbox;
4508 unsigned int nports;
4509 unsigned short chip_number;
4510 int index, port;
4511
4512 if (cinfo->num_chips == -1) { /* Cyclades-Z */
4513 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4514 cinfo->ctl_addr)->mail_box_0);
4515 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4516 cinfo->intr_enabled = 0;
4517 cinfo->nports = 0; /* Will be correctly set later, after
4518 Z FW is loaded */
4519 spin_lock_init(&cinfo->card_lock);
4520 for (port = cinfo->first_line;
4521 port < cinfo->first_line + nports; port++) {
4522 info = &cy_port[port];
4523 info->magic = CYCLADES_MAGIC;
4524 info->type = PORT_STARTECH;
4525 info->card = board;
4526 info->line = port;
4527 info->chip_rev = 0;
4528 info->flags = STD_COM_FLAGS;
4529 info->tty = NULL;
4530 if (mailbox == ZO_V1)
4531 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4532 else
4533 info->xmit_fifo_size =
4534 4 * CYZ_FIFO_SIZE;
4535 info->cor1 = 0;
4536 info->cor2 = 0;
4537 info->cor3 = 0;
4538 info->cor4 = 0;
4539 info->cor5 = 0;
4540 info->tbpr = 0;
4541 info->tco = 0;
4542 info->rbpr = 0;
4543 info->rco = 0;
4544 info->custom_divisor = 0;
4545 info->close_delay = 5 * HZ / 10;
4546 info->closing_wait = CLOSING_WAIT_DELAY;
4547 info->icount.cts = info->icount.dsr =
4548 info->icount.rng = info->icount.dcd = 0;
4549 info->icount.rx = info->icount.tx = 0;
4550 info->icount.frame = info->icount.parity = 0;
4551 info->icount.overrun = info->icount.brk = 0;
4552 info->x_char = 0;
4553 info->event = 0;
4554 info->count = 0;
4555 info->blocked_open = 0;
4556 info->default_threshold = 0;
4557 info->default_timeout = 0;
4558 INIT_WORK(&info->tqueue, do_softint);
4559 init_waitqueue_head(&info->open_wait);
4560 init_waitqueue_head(&info->close_wait);
4561 init_waitqueue_head(&info->shutdown_wait);
4562 init_waitqueue_head(&info->delta_msr_wait);
4563 /* info->session */
4564 /* info->pgrp */
4565 info->read_status_mask = 0;
4566 /* info->timeout */
4567 /* Bentson's vars */
4568 info->jiffies[0] = 0;
4569 info->jiffies[1] = 0;
4570 info->jiffies[2] = 0;
4571 info->rflush_count = 0;
4572#ifdef CONFIG_CYZ_INTR
4573 init_timer(&cyz_rx_full_timer[port]);
4574 cyz_rx_full_timer[port].function = NULL;
4575#endif
4576 }
4577#ifndef CONFIG_CYZ_INTR
4578 if (!timer_pending(&cyz_timerlist)) {
4579 mod_timer(&cyz_timerlist, jiffies + 1);
4580#ifdef CY_PCI_DEBUG
4581 printk("Cyclades-Z polling initialized\n");
4582#endif
4583 }
4584#endif /* CONFIG_CYZ_INTR */
4585
4586 } else { /* Cyclom-Y of some kind */
4587 index = cinfo->bus_index;
4588 spin_lock_init(&cinfo->card_lock);
4589 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4590 for (port = cinfo->first_line;
4591 port < cinfo->first_line + cinfo->nports; port++) {
4592 info = &cy_port[port];
4593 info->magic = CYCLADES_MAGIC;
4594 info->type = PORT_CIRRUS;
4595 info->card = board;
4596 info->line = port;
4597 info->flags = STD_COM_FLAGS;
4598 info->tty = NULL;
4599 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4600 info->cor1 =
4601 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4602 info->cor2 = CyETC;
4603 info->cor3 = 0x08; /* _very_ small rcv threshold */
4604 info->cor4 = 0;
4605 info->cor5 = 0;
4606 info->custom_divisor = 0;
4607 info->close_delay = 5 * HZ / 10;
4608 info->closing_wait = CLOSING_WAIT_DELAY;
4609 info->icount.cts = info->icount.dsr =
4610 info->icount.rng = info->icount.dcd = 0;
4611 info->icount.rx = info->icount.tx = 0;
4612 info->icount.frame = info->icount.parity = 0;
4613 info->icount.overrun = info->icount.brk = 0;
4614 chip_number = (port - cinfo->first_line) / 4;
4615 if ((info->chip_rev =
4616 readb(cinfo->base_addr +
4617 (cy_chip_offset[chip_number] <<
4618 index) + (CyGFRCR << index))) >=
4619 CD1400_REV_J) {
4620 /* It is a CD1400 rev. J or later */
4621 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4622 info->tco = baud_co_60[13]; /* Tx CO */
4623 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4624 info->rco = baud_co_60[13]; /* Rx CO */
4625 info->rflow = 0;
4626 info->rtsdtr_inv = 1;
4627 } else {
4628 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4629 info->tco = baud_co_25[13]; /* Tx CO */
4630 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4631 info->rco = baud_co_25[13]; /* Rx CO */
4632 info->rflow = 0;
4633 info->rtsdtr_inv = 0;
4634 }
4635 info->x_char = 0;
4636 info->event = 0;
4637 info->count = 0;
4638 info->blocked_open = 0;
4639 info->default_threshold = 0;
4640 info->default_timeout = 0;
4641 INIT_WORK(&info->tqueue, do_softint);
4642 init_waitqueue_head(&info->open_wait);
4643 init_waitqueue_head(&info->close_wait);
4644 init_waitqueue_head(&info->shutdown_wait);
4645 init_waitqueue_head(&info->delta_msr_wait);
4646 /* info->session */
4647 /* info->pgrp */
4648 info->read_status_mask =
4649 CyTIMEOUT | CySPECHAR | CyBREAK
4650 | CyPARITY | CyFRAME | CyOVERRUN;
4651 /* info->timeout */
4652 }
4653 }
4654}
4655
1da177e4
LT		 4656/* initialize chips on Cyclom-Y card -- return number of valid
4657 chips (which is number of ports/4) */
4658static unsigned short __init
02f1175c 4659cyy_init_card(void __iomem * true_base_addr, int index)
1da177e4 4660{
02f1175c
JS		 4661 unsigned int chip_number;
4662 void __iomem *base_addr;
4663
4664 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4665 /* Cy_HwReset is 0x1400 */
4666 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4667 /* Cy_ClrIntr is 0x1800 */
4668 udelay(500L);
4669
4670 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4671 base_addr =
4672 true_base_addr + (cy_chip_offset[chip_number] << index);
4673 mdelay(1);
db05c3b1 4674 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4675 /*************
4676 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4677 chip_number, (unsigned long)base_addr);
4678 *************/
4679 return chip_number;
4680 }
4681
4682 cy_writeb(base_addr + (CyGFRCR << index), 0);
4683 udelay(10L);
4684
4685 /* The Cyclom-16Y does not decode address bit 9 and therefore
4686 cannot distinguish between references to chip 0 and a non-
4687 existent chip 4. If the preceding clearing of the supposed
4688 chip 4 GFRCR register appears at chip 0, there is no chip 4
4689 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4690 */
db05c3b1 4691 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4692 (cy_chip_offset[0] << index) +
4693 (CyGFRCR << index)) == 0) {
4694 return chip_number;
4695 }
4696
4697 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4698 mdelay(1);
4699
db05c3b1 4700 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4701 /*
4702 printk(" chip #%d at %#6lx is not responding ",
4703 chip_number, (unsigned long)base_addr);
4704 printk("(GFRCR stayed 0)\n",
4705 */
4706 return chip_number;
4707 }
db05c3b1 4708 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4709 0x40) {
4710 /*
4711 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4712 "%#2x)\n",
4713 chip_number, (unsigned long)base_addr,
4714 base_addr[CyGFRCR<<index]);
4715 */
4716 return chip_number;
4717 }
4718 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4719 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4720 /* It is a CD1400 rev. J or later */
4721 /* Impossible to reach 5ms with this chip.
4722 Changed to 2ms instead (f = 500 Hz). */
4723 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4724 } else {
4725 /* f = 200 Hz */
4726 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4727 }
1da177e4 4728
02f1175c
JS		 4729 /*
4730 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4731 chip_number, (unsigned long)base_addr,
db05c3b1 4732 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4733 */
4734 }
4735 return chip_number;
4736} /* cyy_init_card */
1da177e4
LT		 4737
4738/*
4739 * ---------------------------------------------------------------------
4740 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4741 * sets global variables and return the number of ISA boards found.
4742 * ---------------------------------------------------------------------
4743 */
02f1175c 4744static int __init cy_detect_isa(void)
1da177e4
LT		 4745{
4746#ifdef CONFIG_ISA
02f1175c
JS		 4747 unsigned short cy_isa_irq, nboard;
4748 void __iomem *cy_isa_address;
4749 unsigned short i, j, cy_isa_nchan;
1da177e4 4750#ifdef MODULE
02f1175c 4751 int isparam = 0;
1da177e4
LT		 4752#endif
4753
02f1175c 4754 nboard = 0;
1da177e4
LT		 4755
4756#ifdef MODULE
4757 /* Check for module parameters */
02f1175c
JS		 4758 for (i = 0; i < NR_CARDS; i++) {
4759 if (maddr[i] || i) {
4760 isparam = 1;
4761 cy_isa_addresses[i] = maddr[i];
4762 }
4763 if (!maddr[i])
4764 break;
1da177e4
LT		 4765 }
4766#endif
4767
02f1175c
JS		 4768 /* scan the address table probing for Cyclom-Y/ISA boards */
4769 for (i = 0; i < NR_ISA_ADDRS; i++) {
4770 unsigned int isa_address = cy_isa_addresses[i];
4771 if (isa_address == 0x0000) {
096dcfce 4772 return nboard;
02f1175c 4773 }
1da177e4 4774
02f1175c 4775 /* probe for CD1400... */
1da177e4 4776 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4777 cy_isa_nchan = CyPORTS_PER_CHIP *
4778 cyy_init_card(cy_isa_address, 0);
4779 if (cy_isa_nchan == 0) {
4780 continue;
4781 }
1da177e4
LT		 4782#ifdef MODULE
4783 if (isparam && irq[i])
02f1175c 4784 cy_isa_irq = irq[i];
1da177e4
LT		 4785 else
4786#endif
02f1175c
JS		 4787 /* find out the board's irq by probing */
4788 cy_isa_irq = detect_isa_irq(cy_isa_address);
4789 if (cy_isa_irq == 0) {
4790 printk("Cyclom-Y/ISA found at 0x%lx ",
4791 (unsigned long)cy_isa_address);
4792 printk("but the IRQ could not be detected.\n");
4793 continue;
4794 }
4795
4796 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4797 printk("Cyclom-Y/ISA found at 0x%lx ",
4798 (unsigned long)cy_isa_address);
4799 printk("but no more channels are available.\n");
4800 printk("Change NR_PORTS in cyclades.c and recompile "
4801 "kernel.\n");
096dcfce 4802 return nboard;
02f1175c
JS		 4803 }
4804 /* fill the next cy_card structure available */
4805 for (j = 0; j < NR_CARDS; j++) {
4806 if (cy_card[j].base_addr == 0)
4807 break;
4808 }
4809 if (j == NR_CARDS) { /* no more cy_cards available */
4810 printk("Cyclom-Y/ISA found at 0x%lx ",
4811 (unsigned long)cy_isa_address);
4812 printk("but no more cards can be used .\n");
4813 printk("Change NR_CARDS in cyclades.c and recompile "
4814 "kernel.\n");
096dcfce 4815 return nboard;
02f1175c
JS		 4816 }
4817
4818 /* allocate IRQ */
4819 if (request_irq(cy_isa_irq, cyy_interrupt,
4820 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4821 printk("Cyclom-Y/ISA found at 0x%lx ",
4822 (unsigned long)cy_isa_address);
4823 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
096dcfce 4824 return nboard;
02f1175c
JS		 4825 }
4826
4827 /* set cy_card */
4828 cy_card[j].base_addr = cy_isa_address;
4829 cy_card[j].ctl_addr = NULL;
4830 cy_card[j].irq = (int)cy_isa_irq;
4831 cy_card[j].bus_index = 0;
4832 cy_card[j].first_line = cy_next_channel;
4833 cy_card[j].num_chips = cy_isa_nchan / 4;
f3851e73 4834 cy_init_card(&cy_card[j], j);
02f1175c
JS		 4835 nboard++;
4836
4837 /* print message */
4838 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4839 j + 1, (unsigned long)cy_isa_address,
4840 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4841 cy_isa_irq);
4842 printk("%d channels starting from port %d.\n",
4843 cy_isa_nchan, cy_next_channel);
6ad1ccc1
JS		 4844 for (j = cy_next_channel;
4845 j < cy_next_channel + cy_isa_nchan; j++)
4846 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4847 cy_next_channel += cy_isa_nchan;
4848 }
096dcfce 4849 return nboard;
1da177e4 4850#else
096dcfce 4851 return 0;
02f1175c
JS		 4852#endif /* CONFIG_ISA */
4853} /* cy_detect_isa */
1da177e4 4854
58936d8d
JS		 4855#ifdef CONFIG_PCI
4856static void __devinit plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4857{
02f1175c 4858 /* Reset PLX */
db05c3b1 4859 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
02f1175c 4860 udelay(100L);
db05c3b1 4861 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
02f1175c
JS		 4862
4863 /* Reload Config. Registers from EEPROM */
db05c3b1 4864 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
02f1175c 4865 udelay(100L);
db05c3b1 4866 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4867}
4868
d407c781
JS		 4869static int __devinit cy_init_Ze(unsigned long cy_pci_phys0,
4870 unsigned long cy_pci_phys2,
4871 struct RUNTIME_9060 __iomem *cy_pci_addr0,
2b1da41f 4872 int cy_pci_irq, struct pci_dev *pdev)
d407c781 4873{
2b1da41f 4874 void __iomem *cy_pci_addr2;
d407c781
JS		 4875 unsigned int j;
4876 unsigned short cy_pci_nchan;
4877
2b1da41f
JS		 4878 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4879
d407c781
JS		 4880 readl(&cy_pci_addr0->mail_box_0);
4881#ifdef CY_PCI_DEBUG
4882 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4883 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4884 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
4885 "loaded\n");
4886#endif
4887 /* This must be the new Cyclades-Ze/PCI. */
4888 cy_pci_nchan = ZE_V1_NPORTS;
4889
4890 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4891 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
4892 "are available.\nChange NR_PORTS in cyclades.c "
4893 "and recompile kernel.\n",
4894 (ulong) cy_pci_phys2);
4895 return -EIO;
4896 }
4897
4898 /* fill the next cy_card structure available */
4899 for (j = 0; j < NR_CARDS; j++) {
4900 if (cy_card[j].base_addr == 0)
4901 break;
4902 }
4903 if (j == NR_CARDS) { /* no more cy_cards available */
4904 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
4905 "cards can be used.\nChange NR_CARDS in "
4906 "cyclades.c and recompile kernel.\n",
4907 (ulong) cy_pci_phys2);
4908 return -EIO;
4909 }
4910#ifdef CONFIG_CYZ_INTR
4911 /* allocate IRQ only if board has an IRQ */
4912 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4913 if (request_irq(cy_pci_irq, cyz_interrupt,
4914 IRQF_SHARED, "Cyclades-Z",
4915 &cy_card[j])) {
4916 printk("Cyclom-Ze/PCI found at 0x%lx ",
4917 (ulong) cy_pci_phys2);
4918 printk("but could not allocate IRQ%d.\n",
4919 cy_pci_irq);
4920 return -EIO;
4921 }
4922 }
4923#endif /* CONFIG_CYZ_INTR */
4924
4925 /* set cy_card */
4926 cy_card[j].base_phys = cy_pci_phys2;
4927 cy_card[j].ctl_phys = cy_pci_phys0;
4928 cy_card[j].base_addr = cy_pci_addr2;
4929 cy_card[j].ctl_addr = cy_pci_addr0;
4930 cy_card[j].irq = (int)cy_pci_irq;
4931 cy_card[j].bus_index = 1;
4932 cy_card[j].first_line = cy_next_channel;
4933 cy_card[j].num_chips = -1;
4934 cy_card[j].pdev = pdev;
f3851e73 4935 cy_init_card(&cy_card[j], j);
38d09093 4936 pci_set_drvdata(pdev, &cy_card[j]);
d407c781
JS		 4937
4938 /* print message */
4939#ifdef CONFIG_CYZ_INTR
4940 /* don't report IRQ if board is no IRQ */
4941 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
4942 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4943 j + 1, (ulong) cy_pci_phys2,
4944 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
4945 (int)cy_pci_irq);
4946 else
4947#endif /* CONFIG_CYZ_INTR */
4948 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
4949 j + 1, (ulong) cy_pci_phys2,
4950 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
4951
4952 printk("%d channels starting from port %d.\n",
4953 cy_pci_nchan, cy_next_channel);
6ad1ccc1
JS		 4954 for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4955 tty_register_device(cy_serial_driver, j, &pdev->dev);
d407c781
JS		 4956 cy_next_channel += cy_pci_nchan;
4957
4958 return 0;
4959}
4960
58936d8d
JS		 4961static int __devinit cy_pci_probe(struct pci_dev *pdev,
4962 const struct pci_device_id *ent)
1da177e4 4963{
02f1175c 4964 unsigned char cyy_rev_id;
58936d8d
JS		 4965 unsigned char cy_pci_irq;
4966 __u32 cy_pci_phys0, cy_pci_phys2, mailbox;
02f1175c 4967 void __iomem *cy_pci_addr0, *cy_pci_addr2;
58936d8d
JS		 4968 unsigned int device_id;
4969 unsigned short j, cy_pci_nchan, plx_ver;
d407c781 4970 int retval;
02f1175c 4971
58936d8d
JS		 4972 retval = pci_enable_device(pdev);
4973 if (retval) {
4974 dev_err(&pdev->dev, "cannot enable device\n");
4975 return retval;
4976 }
1da177e4 4977
58936d8d
JS		 4978 /* read PCI configuration area */
4979 cy_pci_irq = pdev->irq;
4980 cy_pci_phys0 = pci_resource_start(pdev, 0);
4981 cy_pci_phys2 = pci_resource_start(pdev, 2);
4982 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
1da177e4 4983
58936d8d 4984 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4985
58936d8d
JS		 4986 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4987 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4988#ifdef CY_PCI_DEBUG
4989 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4990 pdev->bus->number, pdev->devfn);
4991 printk("rev_id=%d) IRQ%d\n",
4992 cyy_rev_id, (int)cy_pci_irq);
4993 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4994 "ctladdr=0x%lx\n",
4995 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4996#endif
1da177e4 4997
58936d8d
JS		 4998 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4999 printk(" Warning: PCI I/O bit incorrectly "
5000 "set. Ignoring it...\n");
5001 pdev->resource[2].flags &= ~IORESOURCE_IO;
5002 }
1da177e4 5003
58936d8d
JS		 5004 /* Although we don't use this I/O region, we should
5005 request it from the kernel anyway, to avoid problems
5006 with other drivers accessing it. */
5007 retval = pci_request_regions(pdev, "Cyclom-Y");
5008 if (retval) {
5009 printk(KERN_ERR "cyclades: failed to reserve "
5010 "PCI resources\n");
5011 return retval;
5012 }
5013#if defined(__alpha__)
5014 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
02f1175c
JS		 5015 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
5016 pdev->bus->number, pdev->devfn);
5017 printk("rev_id=%d) IRQ%d\n",
5018 cyy_rev_id, (int)cy_pci_irq);
5019 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
5020 "ctladdr=0x%lx\n",
58936d8d
JS		 5021 (ulong)cy_pci_phys2,
5022 (ulong)cy_pci_phys0);
5023 printk("Cyclom-Y/PCI not supported for low "
5024 "addresses in Alpha systems.\n");
5025 return -EIO;
5026 }
1da177e4 5027#endif
58936d8d
JS		 5028 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5029 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
1da177e4
LT		 5030
5031#ifdef CY_PCI_DEBUG
58936d8d
JS		 5032 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
5033 "ctladdr=0x%lx\n",
5034 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
1da177e4 5035#endif
58936d8d
JS		 5036 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
5037 cyy_init_card(cy_pci_addr2, 1));
5038 if (cy_pci_nchan == 0) {
5039 printk("Cyclom-Y PCI host card with ");
5040 printk("no Serial-Modules at 0x%lx.\n",
5041 (ulong) cy_pci_phys2);
5042 return -EIO;
5043 }
5044 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5045 printk("Cyclom-Y/PCI found at 0x%lx ",
5046 (ulong) cy_pci_phys2);
5047 printk("but no channels are available.\n");
5048 printk("Change NR_PORTS in cyclades.c and "
5049 "recompile kernel.\n");
5050 return -EIO;
5051 }
5052 /* fill the next cy_card structure available */
5053 for (j = 0; j < NR_CARDS; j++) {
5054 if (cy_card[j].base_addr == 0)
02f1175c 5055 break;
58936d8d
JS		 5056 }
5057 if (j == NR_CARDS) { /* no more cy_cards available */
5058 printk("Cyclom-Y/PCI found at 0x%lx ",
5059 (ulong) cy_pci_phys2);
5060 printk("but no more cards can be used.\n");
5061 printk("Change NR_CARDS in cyclades.c and "
5062 "recompile kernel.\n");
5063 return -EIO;
5064 }
02f1175c 5065
58936d8d
JS		 5066 /* allocate IRQ */
5067 retval = request_irq(cy_pci_irq, cyy_interrupt,
5068 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
5069 if (retval) {
5070 printk("Cyclom-Y/PCI found at 0x%lx ",
5071 (ulong) cy_pci_phys2);
5072 printk("but could not allocate IRQ%d.\n",
5073 cy_pci_irq);
5074 return retval;
5075 }
02f1175c 5076
58936d8d
JS		 5077 /* set cy_card */
5078 cy_card[j].base_phys = (ulong) cy_pci_phys2;
5079 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
5080 cy_card[j].base_addr = cy_pci_addr2;
5081 cy_card[j].ctl_addr = cy_pci_addr0;
5082 cy_card[j].irq = (int)cy_pci_irq;
5083 cy_card[j].bus_index = 1;
5084 cy_card[j].first_line = cy_next_channel;
5085 cy_card[j].num_chips = cy_pci_nchan / 4;
5086 cy_card[j].pdev = pdev;
f3851e73 5087 cy_init_card(&cy_card[j], j);
58936d8d 5088 pci_set_drvdata(pdev, &cy_card[j]);
02f1175c 5089
58936d8d
JS		 5090 /* enable interrupts in the PCI interface */
5091 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
5092 switch (plx_ver) {
5093 case PLX_9050:
5094
5095 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
02f1175c 5096 break;
02f1175c 5097
58936d8d
JS		 5098 case PLX_9060:
5099 case PLX_9080:
5100 default: /* Old boards, use PLX_9060 */
02f1175c
JS		 5101
5102 plx_init(cy_pci_addr0, 0x6c);
58936d8d
JS		 5103 /* For some yet unknown reason, once the PLX9060 reloads
5104 the EEPROM, the IRQ is lost and, thus, we have to
5105 re-write it to the PCI config. registers.
5106 This will remain here until we find a permanent
5107 fix. */
02f1175c 5108 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
58936d8d 5109 cy_pci_irq);
02f1175c 5110
58936d8d
JS		 5111 cy_writew(cy_pci_addr0 + 0x68,
5112 readw(cy_pci_addr0 + 0x68) | 0x0900);
5113 break;
5114 }
02f1175c 5115
58936d8d
JS		 5116 /* print message */
5117 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5118 j + 1, (ulong)cy_pci_phys2,
5119 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
5120 (int)cy_pci_irq);
5121 printk("%d channels starting from port %d.\n",
5122 cy_pci_nchan, cy_next_channel);
6ad1ccc1
JS		 5123 for (j = cy_next_channel;
5124 j < cy_next_channel + cy_pci_nchan; j++)
5125 tty_register_device(cy_serial_driver, j, &pdev->dev);
1da177e4 5126
58936d8d
JS		 5127 cy_next_channel += cy_pci_nchan;
5128 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5129 /* print message */
5130 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5131 pdev->bus->number, pdev->devfn);
5132 printk("rev_id=%d) IRQ%d\n",
5133 cyy_rev_id, (int)cy_pci_irq);
5134 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5135 "ctladdr=0x%lx\n",
5136 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
5137 printk("Cyclades-Z/PCI not supported for low "
5138 "addresses\n");
5139 return -EIO;
5140 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5141#ifdef CY_PCI_DEBUG
5142 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5143 pdev->bus->number, pdev->devfn);
5144 printk("rev_id=%d) IRQ%d\n",
5145 cyy_rev_id, (int)cy_pci_irq);
5146 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5147 "ctladdr=0x%lx\n",
5148 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
5149#endif
5150 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5151
5152 /* Disable interrupts on the PLX before resetting it */
5153 cy_writew(cy_pci_addr0 + 0x68,
5154 readw(cy_pci_addr0 + 0x68) & ~0x0900);
5155
5156 plx_init(cy_pci_addr0, 0x6c);
5157 /* For some yet unknown reason, once the PLX9060 reloads
5158 the EEPROM, the IRQ is lost and, thus, we have to
5159 re-write it to the PCI config. registers.
5160 This will remain here until we find a permanent
5161 fix. */
5162 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
5163 cy_pci_irq);
02f1175c 5164
58936d8d
JS		 5165 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5166 cy_pci_addr0)->mail_box_0);
5167
5168 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5169 printk(" Warning: PCI I/O bit incorrectly "
5170 "set. Ignoring it...\n");
5171 pdev->resource[2].flags &= ~IORESOURCE_IO;
5172 }
5173
5174 /* Although we don't use this I/O region, we should
5175 request it from the kernel anyway, to avoid problems
5176 with other drivers accessing it. */
5177 retval = pci_request_regions(pdev, "Cyclades-Z");
5178 if (retval) {
5179 printk(KERN_ERR "cyclades: failed to reserve "
5180 "PCI resources\n");
5181 return retval;
5182 }
5183
5184 if (mailbox == ZE_V1) {
5185 retval = cy_init_Ze(cy_pci_phys0, cy_pci_phys2,
5186 cy_pci_addr0, cy_pci_irq, pdev);
5187 return retval;
5188 } else {
5189 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5190 }
1da177e4
LT		 5191
5192#ifdef CY_PCI_DEBUG
58936d8d
JS		 5193 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5194 "ctladdr=0x%lx\n",
5195 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5196 if (mailbox == ZO_V1) {
5197 cy_writel(&((struct RUNTIME_9060 *)
5198 (cy_pci_addr0))->loc_addr_base,
5199 WIN_CREG);
5200 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5201 "%lx\n", (ulong) (0xff &
5202 readl(&((struct CUSTOM_REG *)
5203 (cy_pci_addr2))->fpga_id)),
5204 (ulong)(0xff &
5205 readl(&((struct CUSTOM_REG *)
5206 (cy_pci_addr2))->
5207 fpga_version)));
5208 cy_writel(&((struct RUNTIME_9060 *)
5209 (cy_pci_addr0))->loc_addr_base,
5210 WIN_RAM);
5211 } else {
5212 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5213 "FPGA not loaded\n");
5214 }
1da177e4 5215#endif
58936d8d
JS		 5216 /* The following clears the firmware id word. This
5217 ensures that the driver will not attempt to talk to
5218 the board until it has been properly initialized.
5219 */
5220 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5221 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5222
5223 /* This must be a Cyclades-8Zo/PCI. The extendable
5224 version will have a different device_id and will
5225 be allocated its maximum number of ports. */
5226 cy_pci_nchan = 8;
5227
5228 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5229 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5230 "no channels are available.\nChange "
5231 "NR_PORTS in cyclades.c and recompile "
5232 "kernel.\n", (ulong)cy_pci_phys2);
5233 return -EIO;
5234 }
1da177e4 5235
58936d8d
JS		 5236 /* fill the next cy_card structure available */
5237 for (j = 0; j < NR_CARDS; j++) {
5238 if (cy_card[j].base_addr == 0)
5239 break;
5240 }
5241 if (j == NR_CARDS) { /* no more cy_cards available */
5242 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5243 "no more cards can be used.\nChange "
5244 "NR_CARDS in cyclades.c and recompile "
5245 "kernel.\n", (ulong)cy_pci_phys2);
5246 return -EIO;
5247 }
02f1175c 5248#ifdef CONFIG_CYZ_INTR
58936d8d
JS		 5249 /* allocate IRQ only if board has an IRQ */
5250 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5251 retval = request_irq(cy_pci_irq, cyz_interrupt,
5252 IRQF_SHARED, "Cyclades-Z",
5253 &cy_card[j]);
5254 if (retval) {
5255 printk("Cyclom-8Zo/PCI found at 0x%lx "
5256 "but could not allocate "
5257 "IRQ%d.\n", (ulong)cy_pci_phys2,
5258 cy_pci_irq);
5259 return retval;
02f1175c 5260 }
58936d8d 5261 }
02f1175c
JS		 5262#endif /* CONFIG_CYZ_INTR */
5263
58936d8d
JS		 5264 /* set cy_card */
5265 cy_card[j].base_phys = cy_pci_phys2;
5266 cy_card[j].ctl_phys = cy_pci_phys0;
5267 cy_card[j].base_addr = cy_pci_addr2;
5268 cy_card[j].ctl_addr = cy_pci_addr0;
5269 cy_card[j].irq = (int)cy_pci_irq;
5270 cy_card[j].bus_index = 1;
5271 cy_card[j].first_line = cy_next_channel;
5272 cy_card[j].num_chips = -1;
5273 cy_card[j].pdev = pdev;
f3851e73 5274 cy_init_card(&cy_card[j], j);
58936d8d
JS		 5275 pci_set_drvdata(pdev, &cy_card[j]);
5276
5277 /* print message */
1da177e4 5278#ifdef CONFIG_CYZ_INTR
58936d8d
JS		 5279 /* don't report IRQ if board is no IRQ */
5280 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5281 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5282 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5283 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5284 (int)cy_pci_irq);
5285 else
02f1175c 5286#endif /* CONFIG_CYZ_INTR */
58936d8d
JS		 5287 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5288 j + 1, (ulong)cy_pci_phys2,
5289 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5290
5291 printk("%d channels starting from port %d.\n",
5292 cy_pci_nchan, cy_next_channel);
6ad1ccc1
JS		 5293 for (j = cy_next_channel;
5294 j < cy_next_channel + cy_pci_nchan; j++)
5295 tty_register_device(cy_serial_driver, j, &pdev->dev);
58936d8d
JS		 5296 cy_next_channel += cy_pci_nchan;
5297 }
5298
5299 return 0;
5300}
5301#endif
5302
5303/*
5304 * ---------------------------------------------------------------------
5305 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
5306 * sets global variables and return the number of PCI boards found.
5307 * ---------------------------------------------------------------------
5308 */
5309static int __init cy_detect_pci(void)
5310{
5311#ifdef CONFIG_PCI
5312 struct pci_dev *pdev = NULL;
5313 unsigned int i, device_id, dev_index = 0;
02f1175c 5314
58936d8d
JS		 5315 for (i = 0; i < NR_CARDS; i++) {
5316 /* look for a Cyclades card by vendor and device id */
5317 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
5318 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
5319 device_id, pdev)) == NULL) {
5320 dev_index++; /* try next device id */
5321 } else {
5322 break; /* found a board */
5323 }
1da177e4 5324 }
58936d8d
JS		 5325
5326 if (device_id == 0)
5327 break;
5328
5329 i -= !!cy_pci_probe(pdev, &cy_pci_dev_id[dev_index]);
02f1175c 5330 }
1da177e4 5331
096dcfce 5332 return i;
1da177e4 5333#else
096dcfce 5334 return 0;
02f1175c
JS		 5335#endif /* ifdef CONFIG_PCI */
5336} /* cy_detect_pci */
1da177e4 5337
38d09093
JS		 5338static void __devexit cy_pci_release(struct pci_dev *pdev)
5339{
5340#ifdef CONFIG_PCI
5341 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5342 unsigned int i;
38d09093
JS		 5343
5344 pci_iounmap(pdev, cinfo->base_addr);
5345 if (cinfo->ctl_addr)
5346 pci_iounmap(pdev, cinfo->ctl_addr);
5347 if (cinfo->irq
5348#ifndef CONFIG_CYZ_INTR
5349 && cinfo->num_chips != -1 /* not a Z card */
5350#endif /* CONFIG_CYZ_INTR */
5351 )
5352 free_irq(cinfo->irq, cinfo);
5353 pci_release_regions(pdev);
5354
5355 cinfo->base_addr = NULL;
f3851e73
JS		 5356 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5357 cy_port[i].line = -1;
5358 cy_port[i].magic = -1;
5359 }
6ad1ccc1
JS		 5360 for (i = cinfo->first_line; i < cinfo->first_line +
5361 cinfo->nports; i++)
5362 tty_unregister_device(cy_serial_driver, i);
38d09093
JS		 5363#endif
5364}
5365
1da177e4
LT		 5366/*
5367 * This routine prints out the appropriate serial driver version number
5368 * and identifies which options were configured into this driver.
5369 */
02f1175c 5370static inline void show_version(void)
1da177e4 5371{
096dcfce 5372 printk("Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 5373 printk(" built %s %s\n", __DATE__, __TIME__);
5374} /* show_version */
5375
5376static int
1da177e4 5377cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5378 int *eof, void *data)
1da177e4 5379{
02f1175c
JS		 5380 struct cyclades_port *info;
5381 int i;
5382 int len = 0;
5383 off_t begin = 0;
5384 off_t pos = 0;
5385 int size;
5386 __u32 cur_jifs = jiffies;
5387
5388 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5389 "IdleIn Overruns Ldisc\n");
5390
5391 pos += size;
1da177e4 5392 len += size;
1da177e4 5393
02f1175c
JS		 5394 /* Output one line for each known port */
5395 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5396 info = &cy_port[i];
5397
5398 if (info->count)
5399 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5400 "%8lu %9lu %6ld\n", info->line,
096dcfce 5401 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5402 info->idle_stats.xmit_bytes,
096dcfce 5403 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5404 info->idle_stats.recv_bytes,
096dcfce 5405 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5406 info->idle_stats.overruns,
5407 (long)info->tty->ldisc.num);
5408 else
5409 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5410 "%8lu %9lu %6ld\n",
5411 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5412 len += size;
5413 pos = begin + len;
5414
5415 if (pos < offset) {
5416 len = 0;
5417 begin = pos;
5418 }
5419 if (pos > offset + length)
5420 goto done;
1da177e4 5421 }
02f1175c 5422 *eof = 1;
1da177e4 5423done:
02f1175c
JS		 5424 *start = buf + (offset - begin); /* Start of wanted data */
5425 len -= (offset - begin); /* Start slop */
5426 if (len > length)
5427 len = length; /* Ending slop */
5428 if (len < 0)
5429 len = 0;
5430 return len;
1da177e4
LT		 5431}
5432
5433/* The serial driver boot-time initialization code!
5434 Hardware I/O ports are mapped to character special devices on a
5435 first found, first allocated manner. That is, this code searches
5436 for Cyclom cards in the system. As each is found, it is probed
5437 to discover how many chips (and thus how many ports) are present.
5438 These ports are mapped to the tty ports 32 and upward in monotonic
5439 fashion. If an 8-port card is replaced with a 16-port card, the
5440 port mapping on a following card will shift.
5441
5442 This approach is different from what is used in the other serial
5443 device driver because the Cyclom is more properly a multiplexer,
5444 not just an aggregation of serial ports on one card.
5445
5446 If there are more cards with more ports than have been
5447 statically allocated above, a warning is printed and the
5448 extra ports are ignored.
5449 */
5450
b68e31d0 5451static const struct tty_operations cy_ops = {
02f1175c
JS		 5452 .open = cy_open,
5453 .close = cy_close,
5454 .write = cy_write,
5455 .put_char = cy_put_char,
5456 .flush_chars = cy_flush_chars,
5457 .write_room = cy_write_room,
5458 .chars_in_buffer = cy_chars_in_buffer,
5459 .flush_buffer = cy_flush_buffer,
5460 .ioctl = cy_ioctl,
5461 .throttle = cy_throttle,
5462 .unthrottle = cy_unthrottle,
5463 .set_termios = cy_set_termios,
5464 .stop = cy_stop,
5465 .start = cy_start,
5466 .hangup = cy_hangup,
5467 .break_ctl = cy_break,
5468 .wait_until_sent = cy_wait_until_sent,
5469 .read_proc = cyclades_get_proc_info,
5470 .tiocmget = cy_tiocmget,
5471 .tiocmset = cy_tiocmset,
1da177e4
LT		 5472};
5473
02f1175c 5474static int __init cy_init(void)
1da177e4 5475{
14a55a67 5476 unsigned int i, nboards;
9dacf3b2 5477 int retval = -ENOMEM;
02f1175c
JS		 5478
5479 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5480 if (!cy_serial_driver)
9dacf3b2 5481 goto err;
02f1175c
JS		 5482 show_version();
5483
5484 /* Initialize the tty_driver structure */
5485
5486 cy_serial_driver->owner = THIS_MODULE;
5487 cy_serial_driver->driver_name = "cyclades";
5488 cy_serial_driver->name = "ttyC";
5489 cy_serial_driver->major = CYCLADES_MAJOR;
5490 cy_serial_driver->minor_start = 0;
5491 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5492 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5493 cy_serial_driver->init_termios = tty_std_termios;
5494 cy_serial_driver->init_termios.c_cflag =
5495 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5496 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5497 tty_set_operations(cy_serial_driver, &cy_ops);
5498
9dacf3b2
JS		 5499 retval = tty_register_driver(cy_serial_driver);
5500 if (retval) {
5501 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5502 goto err_frtty;
5503 }
02f1175c
JS		 5504
5505 for (i = 0; i < NR_CARDS; i++) {
5506 /* base_addr=0 indicates board not found */
5507 cy_card[i].base_addr = NULL;
5508 }
5509
f3851e73
JS		 5510 /* invalidate remaining cy_port structures */
5511 for (i = 0; i < NR_PORTS; i++) {
5512 cy_port[i].line = -1;
5513 cy_port[i].magic = -1;
5514 }
5515
02f1175c
JS		 5516 /* the code below is responsible to find the boards. Each different
5517 type of board has its own detection routine. If a board is found,
5518 the next cy_card structure available is set by the detection
5519 routine. These functions are responsible for checking the
5520 availability of cy_card and cy_port data structures and updating
5521 the cy_next_channel. */
5522
5523 /* look for isa boards */
14a55a67 5524 nboards = cy_detect_isa();
02f1175c
JS		 5525
5526 /* look for pci boards */
14a55a67 5527 nboards += cy_detect_pci();
02f1175c 5528
9dacf3b2
JS		 5529 if (nboards == 0) {
5530 retval = -ENODEV;
5531 goto err_unr;
5532 }
5533
5534 return 0;
5535err_unr:
5536 tty_unregister_driver(cy_serial_driver);
5537err_frtty:
5538 put_tty_driver(cy_serial_driver);
5539err:
5540 return retval;
02f1175c 5541} /* cy_init */
1da177e4 5542
02f1175c 5543static void __exit cy_cleanup_module(void)
1da177e4 5544{
02f1175c 5545 int i, e1;
1da177e4
LT		 5546
5547#ifndef CONFIG_CYZ_INTR
b7050906 5548 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5549#endif /* CONFIG_CYZ_INTR */
5550
02f1175c
JS		 5551 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5552 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5553 e1);
1da177e4 5554
02f1175c 5555 put_tty_driver(cy_serial_driver);
1da177e4 5556
02f1175c
JS		 5557 for (i = 0; i < NR_CARDS; i++) {
5558 if (cy_card[i].base_addr) {
38d09093
JS		 5559 if (cy_card[i].pdev) {
5560 cy_pci_release(cy_card[i].pdev);
5561 continue;
5562 }
02f1175c
JS		 5563 iounmap(cy_card[i].base_addr);
5564 if (cy_card[i].ctl_addr)
5565 iounmap(cy_card[i].ctl_addr);
5566 if (cy_card[i].irq
1da177e4 5567#ifndef CONFIG_CYZ_INTR
02f1175c 5568 && cy_card[i].num_chips != -1 /* not a Z card */
1da177e4 5569#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5570 )
5571 free_irq(cy_card[i].irq, &cy_card[i]);
6ad1ccc1
JS		 5572 for (e1 = cy_card[i].first_line;
5573 e1 < cy_card[i].first_line +
5574 cy_card[i].nports; e1++)
5575 tty_unregister_device(cy_serial_driver, e1);
02f1175c
JS		 5576 }
5577 }
1da177e4
LT		 5578} /* cy_cleanup_module */
5579
5580module_init(cy_init);
5581module_exit(cy_cleanup_module);
5582
5583MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)