?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[ARM] 3618/1: add defconfig for logicpd pxa270 card engine
[linux-2.6/mini2440.git] / drivers / char / cyclades.c
blobcc7acf877dc0ff92c4b55b1d2314ac4f0461e306
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4 static char rcsid[] =
5 "$Revision: 2.3.2.20 $$Date: 2004/02/25 18:14:16 $";
6
7 /*
8 * linux/drivers/char/cyclades.c
9 *
10 * This file contains the driver for the Cyclades async multiport
11 * serial boards.
12 *
13 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
14 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
15 * Currently maintained by Cyclades team <async@cyclades.com>.
16 *
17 * For Technical support and installation problems, please send e-mail
18 * to support@cyclades.com.
19 *
20 * Much of the design and some of the code came from serial.c
21 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
22 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
23 * and then fixed as suggested by Michael K. Johnson 12/12/92.
24 *
25 * This version supports shared IRQ's (only for PCI boards).
26 *
27 * $Log: cyclades.c,v $
28 * Prevent users from opening non-existing Z ports.
29 *
30 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
31 * Fixed the PCI detection function to work properly on Alpha systems.
32 * Implemented support for TIOCSERGETLSR ioctl.
33 * Implemented full support for non-standard baud rates.
34 *
35 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
36 * Request PLX I/O region, although driver doesn't use it, to avoid
37 * problems with other drivers accessing it.
38 * Removed count for on-board buffer characters in cy_chars_in_buffer
39 * (Cyclades-Z only).
40 *
41 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
42 * Driver now reports physical instead of virtual memory addresses.
43 * Masks were added to some Cyclades-Z read accesses.
44 * Implemented workaround for PLX9050 bug that would cause a system lockup
45 * in certain systems, depending on the MMIO addresses allocated to the
46 * board.
47 * Changed the Tx interrupt programming in the CD1400 chips to boost up
48 * performance (Cyclom-Y only).
49 * Code is now compliant with the new module interface (module_[init|exit]).
50 * Make use of the PCI helper functions to access PCI resources.
51 * Did some code "housekeeping".
52 *
53 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
54 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
55 *
56 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
57 * Fixed SMP locking in Cyclom-Y interrupt handler.
58 *
59 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
60 * Added a new cyclades_card field called nports to allow the driver to
61 * know the exact number of ports found by the Z firmware after its load;
62 * RX buffer contention prevention logic on interrupt op mode revisited
63 * (Cyclades-Z only);
64 * Revisited printk's for Z debug;
65 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
66 *
67 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
68 * Fixed bug in cyz_poll that would make all ports but port 0
69 * unable to transmit/receive data (Cyclades-Z only);
70 * Implemented logic to prevent the RX buffer from being stuck with data
71 * due to a driver / firmware race condition in interrupt op mode
72 * (Cyclades-Z only);
73 * Fixed bug in block_til_ready logic that would lead to a system crash;
74 * Revisited cy_close spinlock usage;
75 *
76 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
77 * Revisited CONFIG_PCI conditional compilation for PCI board support;
78 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
79 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
80 * Removed CTS handling from the driver -- this is now completely handled
81 * by the firmware (Cyclades-Z only);
82 * Flush RX on-board buffers on a port open (Cyclades-Z only);
83 * Fixed handling of ASYNC_SPD_* TTY flags;
84 * Module unload now unmaps all memory area allocated by ioremap;
85 *
86 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
87 * Removed CY_PROC conditional compilation;
88 * Implemented SMP-awareness for the driver;
89 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
90 * functions;
91 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
92 * (irq=NN) as parameters (only for ISA boards);
93 * Fixed bug in set_line_char that would prevent the Cyclades-Z
94 * ports from being configured at speeds above 115.2Kbps;
95 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
96 * switching from working properly;
97 * The driver now only prints IRQ info for the Cyclades-Z if it's
98 * configured to work in interrupt mode;
99 *
100 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
101 * Added support for interrupt mode operation for the Z cards;
102 * Removed the driver inactivity control for the Z;
103 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
104 * the Z firmware is not loaded yet;
105 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
106 * same functionality;
107 * Implemented workaround for IRQ setting loss on the PCI configuration
108 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
109 *
110 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
111 * /proc entry location changed to /proc/tty/driver/cyclades;
112 * Added support to shared IRQ's (only for PCI boards);
113 * Added support for Cobalt Qube2 systems;
114 * IRQ [de]allocation scheme revisited;
115 * BREAK implementation changed in order to make use of the 'break_ctl'
116 * TTY facility;
117 * Fixed typo in TTY structure field 'driver_name';
118 * Included a PCI bridge reset and EEPROM reload in the board
119 * initialization code (for both Y and Z series).
120 *
121 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
122 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
123 * closed properly after a SIGINT;
124 * Module usage counter scheme revisited;
125 * Added support to the upcoming Y PCI boards (i.e., support to additional
126 * PCI Device ID's).
127 *
128 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
129 * Removed all unnecessary page-alignement operations in ioremap calls
130 * (ioremap is currently safe for these operations).
131 *
132 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
133 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
134 * order to make PLX9050-based boards work with certain motherboards.
135 *
136 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
137 * cy_close function now resets (correctly) the tty->closing flag;
138 * JIFFIES_DIFF macro fixed.
139 *
140 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
141 * Fixed bug in cy_close function, which was not informing HW of
142 * which port should have the reception disabled before doing so;
143 * fixed Cyclom-8YoP hardware detection bug.
144 *
145 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
146 * Fixed bug in cy_close function, which causes malfunction
147 * of one of the first 4 ports when a higher port is closed
148 * (Cyclom-Y only).
149 *
150 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
151 * Fixed Cyclom-4Yo hardware detection bug.
152 *
153 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
154 * /proc/cyclades implementation with great collaboration of
155 * Marc Lewis <marc@blarg.net>;
156 * cyy_interrupt was changed to avoid occurrence of kernel oopses
157 * during PPP operation.
158 *
159 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
160 * General code review in order to comply with 2.1 kernel standards;
161 * data loss prevention for slow devices revisited (cy_wait_until_sent
162 * was created);
163 * removed conditional compilation for new/old PCI structure support
164 * (now the driver only supports the new PCI structure).
165 *
166 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
167 * added conditional compilation for new/old PCI structure support;
168 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
169 *
170 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
171 * cleaned up the data loss fix;
172 * fixed XON/XOFF handling once more (Cyclades-Z);
173 * general review of the driver routines;
174 * introduction of a mechanism to prevent data loss with slow
175 * printers, by forcing a delay before closing the port.
176 *
177 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
178 * fixed detection/handling of new CD1400 in Ye boards;
179 * fixed XON/XOFF handling (Cyclades-Z);
180 * fixed data loss caused by a premature port close;
181 * introduction of a flag that holds the CD1400 version ID per port
182 * (used by the CYGETCD1400VER new ioctl).
183 *
184 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
185 * Code review for the module cleanup routine;
186 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
187 * includes anonymous changes regarding signal_pending.
188 *
189 * Revision 2.1 1997/11/01 17:42:41 ivan
190 * Changes in the driver to support Alpha systems (except 8Zo V_1);
191 * BREAK fix for the Cyclades-Z boards;
192 * driver inactivity control by FW implemented;
193 * introduction of flag that allows driver to take advantage of
194 * a special CD1400 feature related to HW flow control;
195 * added support for the CD1400 rev. J (Cyclom-Y boards);
196 * introduction of ioctls to:
197 * - control the rtsdtr_inv flag (Cyclom-Y);
198 * - control the rflow flag (Cyclom-Y);
199 * - adjust the polling interval (Cyclades-Z);
200 *
201 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
202 * Fixes related to kernel version conditional
203 * compilation.
204 *
205 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
206 * Compatibility issues between kernels 2.0.x and
207 * 2.1.x (mainly related to clear_bit function).
208 *
209 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
210 * Changes to define the memory window according to the
211 * board type.
212 *
213 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
214 * Changes to support new cycladesZ boards.
215 *
216 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
217 * Merge of Bentson's and Daniel's version 1.36.4.28.
218 * Corrects bug in cy_detect_pci: check if there are more
219 * ports than the number of static structs allocated.
220 * Warning message during initialization if this driver is
221 * used with the new generation of cycladesZ boards. Those
222 * will be supported only in next release of the driver.
223 * Corrects bug in cy_detect_pci and cy_detect_isa that
224 * returned wrong number of VALID boards, when a cyclomY
225 * was found with no serial modules connected.
226 * Changes to use current (2.1.x) kernel subroutine names
227 * and created macros for compilation with 2.0.x kernel,
228 * instead of the other way around.
229 *
230 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
231 * Change queue_task_irq_off to queue_task_irq.
232 * The inline function queue_task_irq_off (tqueue.h)
233 * was removed from latest releases of 2.1.x kernel.
234 * Use of macro __init to mark the initialization
235 * routines, so memory can be reused.
236 * Also incorporate implementation of critical region
237 * in function cleanup_module() created by anonymous
238 * linuxer.
239 *
240 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
241 * Change to support new firmware that solves DCD problem:
242 * application could fail to receive SIGHUP signal when DCD
243 * varying too fast.
244 *
245 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
246 * Changed for support linux versions 2.1.X.
247 * Backward compatible with linux versions 2.0.X.
248 * Corrected illegal use of filler field in
249 * CH_CTRL struct.
250 * Deleted some debug messages.
251 *
252 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
253 * Included check for NULL tty pointer in cyz_poll.
254 *
255 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
256 * Bill Foster at Blarg! Online services noticed that
257 * some of the switch elements of -Z modem control
258 * lacked a closing "break;"
259 *
260 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
261 * Changed low water threshold for buffer xmit_buf
262 *
263 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
264 * Marcio provided fix to modem status fetch for -Z
265 *
266 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
267 * improve mapping of -Z control page (thanks to Steve
268 * Price <stevep@fa.tdktca.com> for help on this)
269 *
270 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
271 * shift from CPU-bound to memcopy in cyz_polling operation
272 *
273 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
274 * Added support to set and report higher speeds.
275 *
276 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
277 * Some fixes in the HW flow control for the BETA release.
278 * Don't try to register the IRQ.
279 *
280 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
281 * make sure "cyc" appears in all kernel messages; all soft interrupts
282 * handled by same routine; recognize out-of-band reception; comment
283 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
284 * fix race condition in -Z buffer management; only -Y needs to explicitly
285 * flush chars; tidy up some startup messages;
286 *
287 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
288 * shift MOD_INC_USE_COUNT location to match
289 * serial.c; purge some diagnostic messages;
290 *
291 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
292 * enable modem status messages and fetch & process them; note
293 * time of last activity type for each port; set_line_char now
294 * supports more than line 0 and treats 0 baud correctly;
295 * get_modem_info senses rs_status;
296 *
297 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
298 * barely works--now's time to turn on
299 * more features 'til it breaks
300 *
301 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
302 * check more -Z board status; shorten boot message
303 *
304 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
305 * fix reference to ch_ctrl in startup; verify return
306 * values from cyz_issue_cmd and cyz_update_channel;
307 * more stuff to get modem control correct;
308 *
309 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
310 * more -Z stuff folded in; re-order changes to put -Z stuff
311 * after -Y stuff (to make changes clearer)
312 *
313 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
314 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
315 * Add code to send break. Clear firmware ID word at startup (so
316 * that other code won't talk to inactive board).
317 *
318 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
319 * add code for -Z in set_line_char
320 *
321 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
322 * fold more -Z stuff (or in some cases, error messages)
323 * into driver; add text to "don't know what to do" messages.
324 *
325 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
326 * moved compile-time flags near top of file; cosmetic changes
327 * to narrow text (to allow 2-up printing); changed many declarations
328 * to "static" to limit external symbols; shuffled code order to
329 * coalesce -Y and -Z specific code, also to put internal functions
330 * in order of tty_driver structure; added code to recognize -Z
331 * ports (and for moment, do nothing or report error); add cy_startup
332 * to parse boot command line for extra base addresses for ISA probes;
333 *
334 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
335 * reorder some code, fix types of some vars (int vs. long),
336 * add cy_setup to support user declared ISA addresses
337 *
338 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
339 * dump ioctl based firmware load (it's now a user level
340 * program); ensure uninitialzed ports cannot be used
341 *
342 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
343 * rename vars and restructure some code
344 *
345 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
346 * get right status back after boot load
347 *
348 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
349 * successfully loads firmware
350 *
351 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
352 * add more of the code for the boot/load ioctls
353 *
354 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
355 * start to add Z functionality--starting with ioctl
356 * for loading firmware
357 *
358 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
359 * added code to recognize Z/PCI card at initialization; report
360 * presence, but card is not initialized (because firmware needs
361 * to be loaded)
362 *
363 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
364 * starting minor number at zero; added missing verify_area
365 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
366 *
367 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
368 * remove unneeded boot message & fix CLOCAL hardware flow
369 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
370 * remove unused diagnostic statements; minor 0 is first;
371 *
372 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
373 * The kernel function vremap (available only in later 1.3.xx kernels)
374 * allows the access to memory addresses above the RAM. This revision
375 * of the driver supports PCI boards below 1Mb (device id 0x100) and
376 * above 1Mb (device id 0x101).
377 *
378 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
379 * Some global changes to interrupt handling spilled into
380 * this driver--mostly unused arguments in system function
381 * calls. Also added change by Marcio Saito which should
382 * reduce lost interrupts at startup by fast processors.
383 *
384 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
385 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
386 * in 1.3.41 kernel to remove a possible race condition, extend
387 * some error messages, and let the driver run as a loadable module
388 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
389 * possible race condition.
390 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
391 *
392 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
393 * Changes by Linus Torvalds in 1.3.33 kernel distribution
394 * required due to reordering of driver initialization.
395 * Drivers are now initialized *after* memory management.
396 *
397 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
398 * remove printk from ISR; fix typo
399 *
400 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
401 * Minor fixes in the PCI board support. PCI function calls in
402 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
403 * <duncan@okay.com>. "bad serial count" message removed.
404 *
405 * Revision 1.36.3 1995/08/22 09:19:42 marcio
406 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
407 * board initialization. Changes in the boot messages. The driver
408 * supports up to 4 boards and 64 ports by default.
409 *
410 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
411 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
412 *
413 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
414 * add missing break in modem control block in ioctl switch statement
415 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
416 *
417 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
418 * make sure CTS flow control is set as soon as possible (thanks
419 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
420 *
421 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
422 * initialize defaults for receive threshold and stale data timeout;
423 * cosmetic changes;
424 *
425 * Revision 1.36 1995/03/10 23:33:53 bentson
426 * added support of chips 4-7 in 32 port Cyclom-Ye;
427 * fix cy_interrupt pointer dereference problem
428 * (Joe Portman <baron@aa.net>);
429 * give better error response if open is attempted on non-existent port
430 * (Zachariah Vaum <jchryslr@netcom.com>);
431 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
432 * conditional compilation for -16Y on systems with fast, noisy bus;
433 * comment out diagnostic print function;
434 * cleaned up table of base addresses;
435 * set receiver time-out period register to correct value,
436 * set receive threshold to better default values,
437 * set chip timer to more accurate 200 Hz ticking,
438 * add code to monitor and modify receive parameters
439 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
440 * <njs@scifi.emi.net>);
441 *
442 * Revision 1.35 1994/12/16 13:54:18 steffen
443 * additional patch by Marcio Saito for board detection
444 * Accidently left out in 1.34
445 *
446 * Revision 1.34 1994/12/10 12:37:12 steffen
447 * This is the corrected version as suggested by Marcio Saito
448 *
449 * Revision 1.33 1994/12/01 22:41:18 bentson
450 * add hooks to support more high speeds directly; add tytso
451 * patch regarding CLOCAL wakeups
452 *
453 * Revision 1.32 1994/11/23 19:50:04 bentson
454 * allow direct kernel control of higher signalling rates;
455 * look for cards at additional locations
456 *
457 * Revision 1.31 1994/11/16 04:33:28 bentson
458 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
459 * a problem in chars_in_buffer has been resolved by some
460 * small changes; this should yield smoother output
461 *
462 * Revision 1.30 1994/11/16 04:28:05 bentson
463 * Fix from Corey Minyard, Internet: minyard@metronet.com,
464 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
465 * cy_hangup that appears to clear up much (all?) of the
466 * DTR glitches; also he's added/cleaned-up diagnostic messages
467 *
468 * Revision 1.29 1994/11/16 04:16:07 bentson
469 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
470 * operate higher speeds in same way as other serial ports;
471 * add more serial ports (for up to two 16-port muxes).
472 *
473 * Revision 1.28 1994/11/04 00:13:16 root
474 * turn off diagnostic messages
475 *
476 * Revision 1.27 1994/11/03 23:46:37 root
477 * bunch of changes to bring driver into greater conformance
478 * with the serial.c driver (looking for missed fixes)
479 *
480 * Revision 1.26 1994/11/03 22:40:36 root
481 * automatic interrupt probing fixed.
482 *
483 * Revision 1.25 1994/11/03 20:17:02 root
484 * start to implement auto-irq
485 *
486 * Revision 1.24 1994/11/03 18:01:55 root
487 * still working on modem signals--trying not to drop DTR
488 * during the getty/login processes
489 *
490 * Revision 1.23 1994/11/03 17:51:36 root
491 * extend baud rate support; set receive threshold as function
492 * of baud rate; fix some problems with RTS/CTS;
493 *
494 * Revision 1.22 1994/11/02 18:05:35 root
495 * changed arguments to udelay to type long to get
496 * delays to be of correct duration
497 *
498 * Revision 1.21 1994/11/02 17:37:30 root
499 * employ udelay (after calibrating loops_per_second earlier
500 * in init/main.c) instead of using home-grown delay routines
501 *
502 * Revision 1.20 1994/11/02 03:11:38 root
503 * cy_chars_in_buffer forces a return value of 0 to let
504 * login work (don't know why it does); some functions
505 * that were returning EFAULT, now executes the code;
506 * more work on deciding when to disable xmit interrupts;
507 *
508 * Revision 1.19 1994/11/01 20:10:14 root
509 * define routine to start transmission interrupts (by enabling
510 * transmit interrupts); directly enable/disable modem interrupts;
511 *
512 * Revision 1.18 1994/11/01 18:40:45 bentson
513 * Don't always enable transmit interrupts in startup; interrupt on
514 * TxMpty instead of TxRdy to help characters get out before shutdown;
515 * restructure xmit interrupt to check for chars first and quit if
516 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
517 * (to my view);
518 *
519 * Revision 1.17 1994/10/30 04:39:45 bentson
520 * rename serial_driver and callout_driver to cy_serial_driver and
521 * cy_callout_driver to avoid linkage interference; initialize
522 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
523 * from cyclades_port structure; add paranoia check to cy_close;
524 *
525 * Revision 1.16 1994/10/30 01:14:33 bentson
526 * change major numbers; add some _early_ return statements;
527 *
528 * Revision 1.15 1994/10/29 06:43:15 bentson
529 * final tidying up for clean compile; enable some error reporting
530 *
531 * Revision 1.14 1994/10/28 20:30:22 Bentson
532 * lots of changes to drag the driver towards the new tty_io
533 * structures and operation. not expected to work, but may
534 * compile cleanly.
535 *
536 * Revision 1.13 1994/07/21 23:08:57 Bentson
537 * add some diagnostic cruft; support 24 lines (for testing
538 * both -8Y and -16Y cards; be more thorough in servicing all
539 * chips during interrupt; add "volatile" a few places to
540 * circumvent compiler optimizations; fix base & offset
541 * computations in block_til_ready (was causing chip 0 to
542 * stop operation)
543 *
544 * Revision 1.12 1994/07/19 16:42:11 Bentson
545 * add some hackery for kernel version 1.1.8; expand
546 * error messages; refine timing for delay loops and
547 * declare loop params volatile
548 *
549 * Revision 1.11 1994/06/11 21:53:10 bentson
550 * get use of save_car right in transmit interrupt service
551 *
552 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
553 * add some diagnostic printing; try to fix save_car stuff
554 *
555 * Revision 1.10 1994/06/11 20:36:08 bentson
556 * clean up compiler warnings
557 *
558 * Revision 1.9 1994/06/11 19:42:46 bentson
559 * added a bunch of code to support modem signalling
560 *
561 * Revision 1.8 1994/06/11 17:57:07 bentson
562 * recognize break & parity error
563 *
564 * Revision 1.7 1994/06/05 05:51:34 bentson
565 * Reorder baud table to be monotonic; add cli to CP; discard
566 * incoming characters and status if the line isn't open; start to
567 * fold code into cy_throttle; start to port get_serial_info,
568 * set_serial_info, get_modem_info, set_modem_info, and send_break
569 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
570 * get flow control characters from tty struct; invalidate ports w/o
571 * hardware;
572 *
573 * Revision 1.6 1994/05/31 18:42:21 bentson
574 * add a loop-breaker in the interrupt service routine;
575 * note when port is initialized so that it can be shut
576 * down under the right conditions; receive works without
577 * any obvious errors
578 *
579 * Revision 1.5 1994/05/30 00:55:02 bentson
580 * transmit works without obvious errors
581 *
582 * Revision 1.4 1994/05/27 18:46:27 bentson
583 * incorporated more code from lib_y.c; can now print short
584 * strings under interrupt control to port zero; seems to
585 * select ports/channels/lines correctly
586 *
587 * Revision 1.3 1994/05/25 22:12:44 bentson
588 * shifting from multi-port on a card to proper multiplexor
589 * data structures; added skeletons of most routines
590 *
591 * Revision 1.2 1994/05/19 13:21:43 bentson
592 * start to crib from other sources
593 *
594 */
595
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
600 #define NR_CARDS 4
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
607 #define NR_PORTS 256
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
627 #if 0
628 #define PAUSE __asm__("nop");
629 #else
630 #define PAUSE ;
631 #endif
632
633 /*
634 * Include section
635 */
636 #include <linux/config.h>
637 #include <linux/module.h>
638 #include <linux/errno.h>
639 #include <linux/signal.h>
640 #include <linux/sched.h>
641 #include <linux/timer.h>
642 #include <linux/interrupt.h>
643 #include <linux/tty.h>
644 #include <linux/tty_flip.h>
645 #include <linux/serial.h>
646 #include <linux/major.h>
647 #include <linux/string.h>
648 #include <linux/fcntl.h>
649 #include <linux/ptrace.h>
650 #include <linux/cyclades.h>
651 #include <linux/mm.h>
652 #include <linux/ioport.h>
653 #include <linux/init.h>
654 #include <linux/delay.h>
655 #include <linux/spinlock.h>
656 #include <linux/bitops.h>
657
658 #include <asm/system.h>
659 #include <asm/io.h>
660 #include <asm/irq.h>
661 #include <asm/uaccess.h>
662
663 #define CY_LOCK(info,flags) \
664 do { \
665 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
666 } while (0)
667
668 #define CY_UNLOCK(info,flags) \
669 do { \
670 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
671 } while (0)
672
673 #include <linux/types.h>
674 #include <linux/kernel.h>
675 #include <linux/pci.h>
676
677 #include <linux/stat.h>
678 #include <linux/proc_fs.h>
679
680 static void cy_throttle (struct tty_struct *tty);
681 static void cy_send_xchar (struct tty_struct *tty, char ch);
682
683 #define IS_CYC_Z(card) ((card).num_chips == -1)
684
685 #define Z_FPGA_CHECK(card) \
686 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
687 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
688
689 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
690 ((card).ctl_addr))->mail_box_0)) || \
691 Z_FPGA_CHECK(card)) && \
692 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
693 ((card).base_addr+ID_ADDRESS))->signature)))
694
695 #ifndef SERIAL_XMIT_SIZE
696 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
697 #endif
698 #define WAKEUP_CHARS 256
699
700 #define STD_COM_FLAGS (0)
701
702 #define JIFFIES_DIFF(n, j) ((j) - (n))
703
704 static struct tty_driver *cy_serial_driver;
705
706 #ifdef CONFIG_ISA
707 /* This is the address lookup table. The driver will probe for
708 Cyclom-Y/ISA boards at all addresses in here. If you want the
709 driver to probe addresses at a different address, add it to
710 this table. If the driver is probing some other board and
711 causing problems, remove the offending address from this table.
712 The cy_setup function extracts additional addresses from the
713 boot options line. The form is "cyclades=address,address..."
714 */
715
716 static unsigned int cy_isa_addresses[] = {
717 0xD0000,
718 0xD2000,
719 0xD4000,
720 0xD6000,
721 0xD8000,
722 0xDA000,
723 0xDC000,
724 0xDE000,
725 0,0,0,0,0,0,0,0
726 };
727 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
728
729 #ifdef MODULE
730 static long maddr[NR_CARDS] = { 0, };
731 static int irq[NR_CARDS] = { 0, };
732
733 module_param_array(maddr, long, NULL, 0);
734 module_param_array(irq, int, NULL, 0);
735 #endif
736
737 #endif /* CONFIG_ISA */
738
739 /* This is the per-card data structure containing address, irq, number of
740 channels, etc. This driver supports a maximum of NR_CARDS cards.
741 */
742 static struct cyclades_card cy_card[NR_CARDS];
743
744 /* This is the per-channel data structure containing pointers, flags
745 and variables for the port. This driver supports a maximum of NR_PORTS.
746 */
747 static struct cyclades_port cy_port[NR_PORTS];
748
749 static int cy_next_channel; /* next minor available */
750
751 /*
752 * tmp_buf is used as a temporary buffer by serial_write. We need to
753 * lock it in case the copy_from_user blocks while swapping in a page,
754 * and some other program tries to do a serial write at the same time.
755 * Since the lock will only come under contention when the system is
756 * swapping and available memory is low, it makes sense to share one
757 * buffer across all the serial ports, since it significantly saves
758 * memory if large numbers of serial ports are open. This buffer is
759 * allocated when the first cy_open occurs.
760 */
761 static unsigned char *tmp_buf;
762
763 /*
764 * This is used to look up the divisor speeds and the timeouts
765 * We're normally limited to 15 distinct baud rates. The extra
766 * are accessed via settings in info->flags.
767 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
768 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
769 * HI VHI
770 * 20
771 */
772 static int baud_table[] = {
773 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
774 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
775 230400, 0};
776
777 static char baud_co_25[] = { /* 25 MHz clock option table */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
781 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
782
783 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
784 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
785 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
786
787 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
788 /* value => 00 01 02 03 04 */
789 /* divide by 8 32 128 512 2048 */
790 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
791 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
792 0x00};
793
794 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
795 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
796 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
797 0x21};
798
799 static char baud_cor3[] = { /* receive threshold */
800 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
801 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
802 0x07};
803
804 /*
805 * The Cyclades driver implements HW flow control as any serial driver.
806 * The cyclades_port structure member rflow and the vector rflow_thr
807 * allows us to take advantage of a special feature in the CD1400 to avoid
808 * data loss even when the system interrupt latency is too high. These flags
809 * are to be used only with very special applications. Setting these flags
810 * requires the use of a special cable (DTR and RTS reversed). In the new
811 * CD1400-based boards (rev. 6.00 or later), there is no need for special
812 * cables.
813 */
814
815 static char rflow_thr[] = { /* rflow threshold */
816 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
817 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
818 0x0a};
819
820 /* The Cyclom-Ye has placed the sequential chips in non-sequential
821 * address order. This look-up table overcomes that problem.
822 */
823 static int cy_chip_offset [] =
824 { 0x0000,
825 0x0400,
826 0x0800,
827 0x0C00,
828 0x0200,
829 0x0600,
830 0x0A00,
831 0x0E00
832 };
833
834 /* PCI related definitions */
835
836 static unsigned short cy_pci_nboard;
837 static unsigned short cy_isa_nboard;
838 static unsigned short cy_nboard;
839 #ifdef CONFIG_PCI
840 static unsigned short cy_pci_dev_id[] = {
841 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
842 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
843 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
844 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
845 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
846 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
847 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
848 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
849 0 /* end of table */
850 };
851 #endif
852
853 static void cy_start(struct tty_struct *);
854 static void set_line_char(struct cyclades_port *);
855 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
856 #ifdef CONFIG_ISA
857 static unsigned detect_isa_irq(void __iomem *);
858 #endif /* CONFIG_ISA */
859
860 static int cyclades_get_proc_info(char *, char **, off_t , int , int *, void *);
861
862 #ifndef CONFIG_CYZ_INTR
863 static void cyz_poll(unsigned long);
864
865 /* The Cyclades-Z polling cycle is defined by this variable */
866 static long cyz_polling_cycle = CZ_DEF_POLL;
867
868 static int cyz_timeron = 0;
869 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
870
871 #else /* CONFIG_CYZ_INTR */
872 static void cyz_rx_restart(unsigned long);
873 static struct timer_list cyz_rx_full_timer[NR_PORTS];
874 #endif /* CONFIG_CYZ_INTR */
875
876 static inline int
877 serial_paranoia_check(struct cyclades_port *info,
878 char *name, const char *routine)
879 {
880 #ifdef SERIAL_PARANOIA_CHECK
881 static const char *badmagic =
882 "cyc Warning: bad magic number for serial struct (%s) in %s\n";
883 static const char *badinfo =
884 "cyc Warning: null cyclades_port for (%s) in %s\n";
885 static const char *badrange =
886 "cyc Warning: cyclades_port out of range for (%s) in %s\n";
887
888 if (!info) {
889 printk(badinfo, name, routine);
890 return 1;
891 }
892
893 if( (long)info < (long)(&cy_port[0])
894 || (long)(&cy_port[NR_PORTS]) < (long)info ){
895 printk(badrange, name, routine);
896 return 1;
897 }
898
899 if (info->magic != CYCLADES_MAGIC) {
900 printk(badmagic, name, routine);
901 return 1;
902 }
903 #endif
904 return 0;
905 } /* serial_paranoia_check */
906
907 /*
908 * This routine is used by the interrupt handler to schedule
909 * processing in the software interrupt portion of the driver
910 * (also known as the "bottom half"). This can be called any
911 * number of times for any channel without harm.
912 */
913 static inline void
914 cy_sched_event(struct cyclades_port *info, int event)
915 {
916 info->event |= 1 << event; /* remember what kind of event and who */
917 schedule_work(&info->tqueue);
918 } /* cy_sched_event */
919
920
921 /*
922 * This routine is used to handle the "bottom half" processing for the
923 * serial driver, known also the "software interrupt" processing.
924 * This processing is done at the kernel interrupt level, after the
925 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
926 * is where time-consuming activities which can not be done in the
927 * interrupt driver proper are done; the interrupt driver schedules
928 * them using cy_sched_event(), and they get done here.
929 *
930 * This is done through one level of indirection--the task queue.
931 * When a hardware interrupt service routine wants service by the
932 * driver's bottom half, it enqueues the appropriate tq_struct (one
933 * per port) to the keventd work queue and sets a request flag
934 * that the work queue be processed.
935 *
936 * Although this may seem unwieldy, it gives the system a way to
937 * pass an argument (in this case the pointer to the cyclades_port
938 * structure) to the bottom half of the driver. Previous kernels
939 * had to poll every port to see if that port needed servicing.
940 */
941 static void
942 do_softint(void *private_)
943 {
944 struct cyclades_port *info = (struct cyclades_port *) private_;
945 struct tty_struct *tty;
946
947 tty = info->tty;
948 if (!tty)
949 return;
950
951 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
952 tty_hangup(info->tty);
953 wake_up_interruptible(&info->open_wait);
954 info->flags &= ~ASYNC_NORMAL_ACTIVE;
955 }
956 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
957 wake_up_interruptible(&info->open_wait);
958 }
959 #ifdef CONFIG_CYZ_INTR
960 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
961 if (cyz_rx_full_timer[info->line].function == NULL) {
962 cyz_rx_full_timer[info->line].expires = jiffies + 1;
963 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
964 cyz_rx_full_timer[info->line].data = (unsigned long)info;
965 add_timer(&cyz_rx_full_timer[info->line]);
966 }
967 }
968 #endif
969 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
970 wake_up_interruptible(&info->delta_msr_wait);
971 }
972 if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
973 tty_wakeup(tty);
974 wake_up_interruptible(&tty->write_wait);
975 }
976 #ifdef Z_WAKE
977 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
978 wake_up_interruptible(&info->shutdown_wait);
979 }
980 #endif
981 } /* do_softint */
982
983
984 /***********************************************************/
985 /********* Start of block of Cyclom-Y specific code ********/
986
987 /* This routine waits up to 1000 micro-seconds for the previous
988 command to the Cirrus chip to complete and then issues the
989 new command. An error is returned if the previous command
990 didn't finish within the time limit.
991
992 This function is only called from inside spinlock-protected code.
993 */
994 static int
995 cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
996 {
997 volatile int i;
998
999 /* Check to see that the previous command has completed */
1000 for(i = 0 ; i < 100 ; i++){
1001 if (cy_readb(base_addr+(CyCCR<<index)) == 0){
1002 break;
1003 }
1004 udelay(10L);
1005 }
1006 /* if the CCR never cleared, the previous command
1007 didn't finish within the "reasonable time" */
1008 if (i == 100) return (-1);
1009
1010 /* Issue the new command */
1011 cy_writeb(base_addr+(CyCCR<<index), cmd);
1012
1013 return(0);
1014 } /* cyy_issue_cmd */
1015
1016 #ifdef CONFIG_ISA
1017 /* ISA interrupt detection code */
1018 static unsigned
1019 detect_isa_irq(void __iomem *address)
1020 {
1021 int irq;
1022 unsigned long irqs, flags;
1023 int save_xir, save_car;
1024 int index = 0; /* IRQ probing is only for ISA */
1025
1026 /* forget possible initially masked and pending IRQ */
1027 irq = probe_irq_off(probe_irq_on());
1028
1029 /* Clear interrupts on the board first */
1030 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1031 /* Cy_ClrIntr is 0x1800 */
1032
1033 irqs = probe_irq_on();
1034 /* Wait ... */
1035 udelay(5000L);
1036
1037 /* Enable the Tx interrupts on the CD1400 */
1038 local_irq_save(flags);
1039 cy_writeb(address + (CyCAR<<index), 0);
1040 cyy_issue_cmd(address, CyCHAN_CTL|CyENB_XMTR, index);
1041
1042 cy_writeb(address + (CyCAR<<index), 0);
1043 cy_writeb(address + (CySRER<<index),
1044 cy_readb(address + (CySRER<<index)) | CyTxRdy);
1045 local_irq_restore(flags);
1046
1047 /* Wait ... */
1048 udelay(5000L);
1049
1050 /* Check which interrupt is in use */
1051 irq = probe_irq_off(irqs);
1052
1053 /* Clean up */
1054 save_xir = (u_char) cy_readb(address + (CyTIR<<index));
1055 save_car = cy_readb(address + (CyCAR<<index));
1056 cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
1057 cy_writeb(address + (CySRER<<index),
1058 cy_readb(address + (CySRER<<index)) & ~CyTxRdy);
1059 cy_writeb(address + (CyTIR<<index), (save_xir & 0x3f));
1060 cy_writeb(address + (CyCAR<<index), (save_car));
1061 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1062 /* Cy_ClrIntr is 0x1800 */
1063
1064 return (irq > 0)? irq : 0;
1065 }
1066 #endif /* CONFIG_ISA */
1067
1068 /* The real interrupt service routine is called
1069 whenever the card wants its hand held--chars
1070 received, out buffer empty, modem change, etc.
1071 */
1072 static irqreturn_t
1073 cyy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1074 {
1075 struct tty_struct *tty;
1076 int status;
1077 struct cyclades_card *cinfo;
1078 struct cyclades_port *info;
1079 void __iomem *base_addr, *card_base_addr;
1080 int chip;
1081 int save_xir, channel, save_car;
1082 char data;
1083 volatile int char_count;
1084 int outch;
1085 int i,j,index;
1086 int too_many;
1087 int had_work;
1088 int mdm_change;
1089 int mdm_status;
1090 int len;
1091 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1092 #ifdef CY_DEBUG_INTERRUPTS
1093 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1094 #endif
1095 return IRQ_NONE; /* spurious interrupt */
1096 }
1097
1098 card_base_addr = cinfo->base_addr;
1099 index = cinfo->bus_index;
1100
1101
1102 /* This loop checks all chips in the card. Make a note whenever
1103 _any_ chip had some work to do, as this is considered an
1104 indication that there will be more to do. Only when no chip
1105 has any work does this outermost loop exit.
1106 */
1107 do{
1108 had_work = 0;
1109 for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
1110 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
1111 too_many = 0;
1112 while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
1113 had_work++;
1114 /* The purpose of the following test is to ensure that
1115 no chip can monopolize the driver. This forces the
1116 chips to be checked in a round-robin fashion (after
1117 draining each of a bunch (1000) of characters).
1118 */
1119 if(1000<too_many++){
1120 break;
1121 }
1122 if (status & CySRReceive) { /* reception interrupt */
1123 #ifdef CY_DEBUG_INTERRUPTS
1124 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1125 #endif
1126 /* determine the channel & change to that context */
1127 spin_lock(&cinfo->card_lock);
1128 save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
1129 channel = (u_short ) (save_xir & CyIRChannel);
1130 i = channel + chip * 4 + cinfo->first_line;
1131 info = &cy_port[i];
1132 info->last_active = jiffies;
1133 save_car = cy_readb(base_addr+(CyCAR<<index));
1134 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1135
1136 /* if there is nowhere to put the data, discard it */
1137 if(info->tty == 0){
1138 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1139 if ( j == CyIVRRxEx ) { /* exception */
1140 data = cy_readb(base_addr+(CyRDSR<<index));
1141 } else { /* normal character reception */
1142 char_count = cy_readb(base_addr+(CyRDCR<<index));
1143 while(char_count--){
1144 data = cy_readb(base_addr+(CyRDSR<<index));
1145 }
1146 }
1147 }else{ /* there is an open port for this data */
1148 tty = info->tty;
1149 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1150 if ( j == CyIVRRxEx ) { /* exception */
1151 data = cy_readb(base_addr+(CyRDSR<<index));
1152
1153 /* For statistics only */
1154 if (data & CyBREAK)
1155 info->icount.brk++;
1156 else if(data & CyFRAME)
1157 info->icount.frame++;
1158 else if(data & CyPARITY)
1159 info->icount.parity++;
1160 else if(data & CyOVERRUN)
1161 info->icount.overrun++;
1162
1163 if(data & info->ignore_status_mask){
1164 info->icount.rx++;
1165 continue;
1166 }
1167 if (tty_buffer_request_room(tty, 1)) {
1168 if (data & info->read_status_mask){
1169 if(data & CyBREAK){
1170 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_BREAK);
1171 info->icount.rx++;
1172 if (info->flags & ASYNC_SAK){
1173 do_SAK(tty);
1174 }
1175 }else if(data & CyFRAME){
1176 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1177 info->icount.rx++;
1178 info->idle_stats.frame_errs++;
1179 }else if(data & CyPARITY){
1180 /* Pieces of seven... */
1181 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_PARITY);
1182 info->icount.rx++;
1183 info->idle_stats.parity_errs++;
1184 }else if(data & CyOVERRUN){
1185 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1186 info->icount.rx++;
1187 /* If the flip buffer itself is
1188 overflowing, we still lose
1189 the next incoming character.
1190 */
1191 tty_insert_flip_char(tty, cy_readb(base_addr+(CyRDSR<<index)), TTY_FRAME);
1192 info->icount.rx++;
1193 info->idle_stats.overruns++;
1194 /* These two conditions may imply */
1195 /* a normal read should be done. */
1196 /* }else if(data & CyTIMEOUT){ */
1197 /* }else if(data & CySPECHAR){ */
1198 }else {
1199 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1200 info->icount.rx++;
1201 }
1202 }else{
1203 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1204 info->icount.rx++;
1205 }
1206 }else{
1207 /* there was a software buffer
1208 overrun and nothing could be
1209 done about it!!! */
1210 info->icount.buf_overrun++;
1211 info->idle_stats.overruns++;
1212 }
1213 } else { /* normal character reception */
1214 /* load # chars available from the chip */
1215 char_count = cy_readb(base_addr+(CyRDCR<<index));
1216
1217 #ifdef CY_ENABLE_MONITORING
1218 ++info->mon.int_count;
1219 info->mon.char_count += char_count;
1220 if (char_count > info->mon.char_max)
1221 info->mon.char_max = char_count;
1222 info->mon.char_last = char_count;
1223 #endif
1224 len = tty_buffer_request_room(tty, char_count);
1225 while(len--){
1226 data = cy_readb(base_addr+(CyRDSR<<index));
1227 tty_insert_flip_char(tty, data, TTY_NORMAL);
1228 info->idle_stats.recv_bytes++;
1229 info->icount.rx++;
1230 #ifdef CY_16Y_HACK
1231 udelay(10L);
1232 #endif
1233 }
1234 info->idle_stats.recv_idle = jiffies;
1235 }
1236 tty_schedule_flip(tty);
1237 }
1238 /* end of service */
1239 cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
1240 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1241 spin_unlock(&cinfo->card_lock);
1242 }
1243
1244
1245 if (status & CySRTransmit) { /* transmission interrupt */
1246 /* Since we only get here when the transmit buffer
1247 is empty, we know we can always stuff a dozen
1248 characters. */
1249 #ifdef CY_DEBUG_INTERRUPTS
1250 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1251 #endif
1252
1253 /* determine the channel & change to that context */
1254 spin_lock(&cinfo->card_lock);
1255 save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
1256 channel = (u_short ) (save_xir & CyIRChannel);
1257 i = channel + chip * 4 + cinfo->first_line;
1258 save_car = cy_readb(base_addr+(CyCAR<<index));
1259 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1260
1261 /* validate the port# (as configured and open) */
1262 if( (i < 0) || (NR_PORTS <= i) ){
1263 cy_writeb(base_addr+(CySRER<<index),
1264 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1265 goto txend;
1266 }
1267 info = &cy_port[i];
1268 info->last_active = jiffies;
1269 if(info->tty == 0){
1270 cy_writeb(base_addr+(CySRER<<index),
1271 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1272 goto txdone;
1273 }
1274
1275 /* load the on-chip space for outbound data */
1276 char_count = info->xmit_fifo_size;
1277
1278 if(info->x_char) { /* send special char */
1279 outch = info->x_char;
1280 cy_writeb(base_addr+(CyTDR<<index), outch);
1281 char_count--;
1282 info->icount.tx++;
1283 info->x_char = 0;
1284 }
1285
1286 if (info->breakon || info->breakoff) {
1287 if (info->breakon) {
1288 cy_writeb(base_addr + (CyTDR<<index), 0);
1289 cy_writeb(base_addr + (CyTDR<<index), 0x81);
1290 info->breakon = 0;
1291 char_count -= 2;
1292 }
1293 if (info->breakoff) {
1294 cy_writeb(base_addr + (CyTDR<<index), 0);
1295 cy_writeb(base_addr + (CyTDR<<index), 0x83);
1296 info->breakoff = 0;
1297 char_count -= 2;
1298 }
1299 }
1300
1301 while (char_count-- > 0){
1302 if (!info->xmit_cnt){
1303 if (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
1304 cy_writeb(base_addr+(CySRER<<index),
1305 cy_readb(base_addr+(CySRER<<index)) &
1306 ~CyTxMpty);
1307 } else {
1308 cy_writeb(base_addr+(CySRER<<index),
1309 ((cy_readb(base_addr+(CySRER<<index))
1310 & ~CyTxRdy)
1311 | CyTxMpty));
1312 }
1313 goto txdone;
1314 }
1315 if (info->xmit_buf == 0){
1316 cy_writeb(base_addr+(CySRER<<index),
1317 cy_readb(base_addr+(CySRER<<index)) &
1318 ~CyTxRdy);
1319 goto txdone;
1320 }
1321 if (info->tty->stopped || info->tty->hw_stopped){
1322 cy_writeb(base_addr+(CySRER<<index),
1323 cy_readb(base_addr+(CySRER<<index)) &
1324 ~CyTxRdy);
1325 goto txdone;
1326 }
1327 /* Because the Embedded Transmit Commands have
1328 been enabled, we must check to see if the
1329 escape character, NULL, is being sent. If it
1330 is, we must ensure that there is room for it
1331 to be doubled in the output stream. Therefore
1332 we no longer advance the pointer when the
1333 character is fetched, but rather wait until
1334 after the check for a NULL output character.
1335 This is necessary because there may not be
1336 room for the two chars needed to send a NULL.)
1337 */
1338 outch = info->xmit_buf[info->xmit_tail];
1339 if( outch ){
1340 info->xmit_cnt--;
1341 info->xmit_tail = (info->xmit_tail + 1)
1342 & (SERIAL_XMIT_SIZE - 1);
1343 cy_writeb(base_addr+(CyTDR<<index), outch);
1344 info->icount.tx++;
1345 }else{
1346 if(char_count > 1){
1347 info->xmit_cnt--;
1348 info->xmit_tail = (info->xmit_tail + 1)
1349 & (SERIAL_XMIT_SIZE - 1);
1350 cy_writeb(base_addr+(CyTDR<<index),
1351 outch);
1352 cy_writeb(base_addr+(CyTDR<<index), 0);
1353 info->icount.tx++;
1354 char_count--;
1355 }else{
1356 }
1357 }
1358 }
1359
1360 txdone:
1361 if (info->xmit_cnt < WAKEUP_CHARS) {
1362 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1363 }
1364 txend:
1365 /* end of service */
1366 cy_writeb(base_addr+(CyTIR<<index),
1367 (save_xir & 0x3f));
1368 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1369 spin_unlock(&cinfo->card_lock);
1370 }
1371
1372 if (status & CySRModem) { /* modem interrupt */
1373
1374 /* determine the channel & change to that context */
1375 spin_lock(&cinfo->card_lock);
1376 save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
1377 channel = (u_short ) (save_xir & CyIRChannel);
1378 info = &cy_port[channel + chip * 4
1379 + cinfo->first_line];
1380 info->last_active = jiffies;
1381 save_car = cy_readb(base_addr+(CyCAR<<index));
1382 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1383
1384 mdm_change = cy_readb(base_addr+(CyMISR<<index));
1385 mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
1386
1387 if(info->tty == 0){/* no place for data, ignore it*/
1388 ;
1389 }else{
1390 if (mdm_change & CyANY_DELTA) {
1391 /* For statistics only */
1392 if (mdm_change & CyDCD) info->icount.dcd++;
1393 if (mdm_change & CyCTS) info->icount.cts++;
1394 if (mdm_change & CyDSR) info->icount.dsr++;
1395 if (mdm_change & CyRI) info->icount.rng++;
1396
1397 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1398 }
1399
1400 if((mdm_change & CyDCD)
1401 && (info->flags & ASYNC_CHECK_CD)){
1402 if(mdm_status & CyDCD){
1403 cy_sched_event(info,
1404 Cy_EVENT_OPEN_WAKEUP);
1405 }else{
1406 cy_sched_event(info,
1407 Cy_EVENT_HANGUP);
1408 }
1409 }
1410 if((mdm_change & CyCTS)
1411 && (info->flags & ASYNC_CTS_FLOW)){
1412 if(info->tty->hw_stopped){
1413 if(mdm_status & CyCTS){
1414 /* cy_start isn't used
1415 because... !!! */
1416 info->tty->hw_stopped = 0;
1417 cy_writeb(base_addr+(CySRER<<index),
1418 cy_readb(base_addr+(CySRER<<index)) |
1419 CyTxRdy);
1420 cy_sched_event(info,
1421 Cy_EVENT_WRITE_WAKEUP);
1422 }
1423 }else{
1424 if(!(mdm_status & CyCTS)){
1425 /* cy_stop isn't used
1426 because ... !!! */
1427 info->tty->hw_stopped = 1;
1428 cy_writeb(base_addr+(CySRER<<index),
1429 cy_readb(base_addr+(CySRER<<index)) &
1430 ~CyTxRdy);
1431 }
1432 }
1433 }
1434 if(mdm_change & CyDSR){
1435 }
1436 if(mdm_change & CyRI){
1437 }
1438 }
1439 /* end of service */
1440 cy_writeb(base_addr+(CyMIR<<index),
1441 (save_xir & 0x3f));
1442 cy_writeb(base_addr+(CyCAR<<index), save_car);
1443 spin_unlock(&cinfo->card_lock);
1444 }
1445 } /* end while status != 0 */
1446 } /* end loop for chips... */
1447 } while(had_work);
1448
1449 /* clear interrupts */
1450 spin_lock(&cinfo->card_lock);
1451 cy_writeb(card_base_addr + (Cy_ClrIntr<<index), 0);
1452 /* Cy_ClrIntr is 0x1800 */
1453 spin_unlock(&cinfo->card_lock);
1454 return IRQ_HANDLED;
1455 } /* cyy_interrupt */
1456
1457 /***********************************************************/
1458 /********* End of block of Cyclom-Y specific code **********/
1459 /******** Start of block of Cyclades-Z specific code *********/
1460 /***********************************************************/
1461
1462 static int
1463 cyz_fetch_msg( struct cyclades_card *cinfo,
1464 uclong *channel, ucchar *cmd, uclong *param)
1465 {
1466 struct FIRM_ID __iomem *firm_id;
1467 struct ZFW_CTRL __iomem *zfw_ctrl;
1468 struct BOARD_CTRL __iomem *board_ctrl;
1469 unsigned long loc_doorbell;
1470
1471 firm_id = cinfo->base_addr + ID_ADDRESS;
1472 if (!ISZLOADED(*cinfo)){
1473 return (-1);
1474 }
1475 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1476 board_ctrl = &zfw_ctrl->board_ctrl;
1477
1478 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1479 (cinfo->ctl_addr))->loc_doorbell);
1480 if (loc_doorbell){
1481 *cmd = (char)(0xff & loc_doorbell);
1482 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1483 *param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
1484 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->loc_doorbell,
1485 0xffffffff);
1486 return 1;
1487 }
1488 return 0;
1489 } /* cyz_fetch_msg */
1490
1491 static int
1492 cyz_issue_cmd( struct cyclades_card *cinfo,
1493 uclong channel, ucchar cmd, uclong param)
1494 {
1495 struct FIRM_ID __iomem *firm_id;
1496 struct ZFW_CTRL __iomem *zfw_ctrl;
1497 struct BOARD_CTRL __iomem *board_ctrl;
1498 unsigned long __iomem *pci_doorbell;
1499 int index;
1500
1501 firm_id = cinfo->base_addr + ID_ADDRESS;
1502 if (!ISZLOADED(*cinfo)){
1503 return (-1);
1504 }
1505 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1506 board_ctrl = &zfw_ctrl->board_ctrl;
1507
1508 index = 0;
1509 pci_doorbell = &((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->pci_doorbell;
1510 while( (cy_readl(pci_doorbell) & 0xff) != 0){
1511 if (index++ == 1000){
1512 return((int)(cy_readl(pci_doorbell) & 0xff));
1513 }
1514 udelay(50L);
1515 }
1516 cy_writel(&board_ctrl->hcmd_channel, channel);
1517 cy_writel(&board_ctrl->hcmd_param , param);
1518 cy_writel(pci_doorbell, (long)cmd);
1519
1520 return(0);
1521 } /* cyz_issue_cmd */
1522
1523 static void
1524 cyz_handle_rx(struct cyclades_port *info,
1525 volatile struct CH_CTRL __iomem *ch_ctrl,
1526 volatile struct BUF_CTRL __iomem *buf_ctrl)
1527 {
1528 struct cyclades_card *cinfo = &cy_card[info->card];
1529 struct tty_struct *tty = info->tty;
1530 volatile int char_count;
1531 int len;
1532 #ifdef BLOCKMOVE
1533 int small_count;
1534 #else
1535 char data;
1536 #endif
1537 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1538
1539 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1540 rx_put = cy_readl(&buf_ctrl->rx_put);
1541 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1542 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1543 if (rx_put >= rx_get)
1544 char_count = rx_put - rx_get;
1545 else
1546 char_count = rx_put - rx_get + rx_bufsize;
1547
1548 if ( char_count ) {
1549 info->last_active = jiffies;
1550 info->jiffies[1] = jiffies;
1551
1552 #ifdef CY_ENABLE_MONITORING
1553 info->mon.int_count++;
1554 info->mon.char_count += char_count;
1555 if (char_count > info->mon.char_max)
1556 info->mon.char_max = char_count;
1557 info->mon.char_last = char_count;
1558 #endif
1559 if(tty == 0){
1560 /* flush received characters */
1561 new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1);
1562 info->rflush_count++;
1563 }else{
1564 #ifdef BLOCKMOVE
1565 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1566 for performance, but because of buffer boundaries, there
1567 may be several steps to the operation */
1568 while(0 < (small_count =
1569 min_t(unsigned int, (rx_bufsize - new_rx_get),
1570 min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
1571 )) {
1572 memcpy_fromio(tty->flip.char_buf_ptr,
1573 (char *)(cinfo->base_addr
1574 + rx_bufaddr + new_rx_get),
1575 small_count);
1576
1577 tty->flip.char_buf_ptr += small_count;
1578 memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
1579 tty->flip.flag_buf_ptr += small_count;
1580 new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
1581 char_count -= small_count;
1582 info->icount.rx += small_count;
1583 info->idle_stats.recv_bytes += small_count;
1584 tty->flip.count += small_count;
1585 }
1586 #else
1587 len = tty_buffer_request_room(tty, char_count);
1588 while(len--){
1589 data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
1590 new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
1591 tty_insert_flip_char(tty, data, TTY_NORMAL);
1592 info->idle_stats.recv_bytes++;
1593 info->icount.rx++;
1594 }
1595 #endif
1596 #ifdef CONFIG_CYZ_INTR
1597 /* Recalculate the number of chars in the RX buffer and issue
1598 a cmd in case it's higher than the RX high water mark */
1599 rx_put = cy_readl(&buf_ctrl->rx_put);
1600 if (rx_put >= rx_get)
1601 char_count = rx_put - rx_get;
1602 else
1603 char_count = rx_put - rx_get + rx_bufsize;
1604 if(char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1605 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1606 }
1607 #endif
1608 info->idle_stats.recv_idle = jiffies;
1609 tty_schedule_flip(tty);
1610 }
1611 /* Update rx_get */
1612 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1613 }
1614 }
1615
1616 static void
1617 cyz_handle_tx(struct cyclades_port *info,
1618 volatile struct CH_CTRL __iomem *ch_ctrl,
1619 volatile struct BUF_CTRL __iomem *buf_ctrl)
1620 {
1621 struct cyclades_card *cinfo = &cy_card[info->card];
1622 struct tty_struct *tty = info->tty;
1623 char data;
1624 volatile int char_count;
1625 #ifdef BLOCKMOVE
1626 int small_count;
1627 #endif
1628 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1629
1630 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1631 return;
1632
1633 tx_get = cy_readl(&buf_ctrl->tx_get);
1634 tx_put = cy_readl(&buf_ctrl->tx_put);
1635 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1636 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1637 if (tx_put >= tx_get)
1638 char_count = tx_get - tx_put - 1 + tx_bufsize;
1639 else
1640 char_count = tx_get - tx_put - 1;
1641
1642 if ( char_count ) {
1643
1644 if( tty == 0 ){
1645 goto ztxdone;
1646 }
1647
1648 if(info->x_char) { /* send special char */
1649 data = info->x_char;
1650
1651 cy_writeb((cinfo->base_addr + tx_bufaddr + tx_put), data);
1652 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1653 info->x_char = 0;
1654 char_count--;
1655 info->icount.tx++;
1656 info->last_active = jiffies;
1657 info->jiffies[2] = jiffies;
1658 }
1659 #ifdef BLOCKMOVE
1660 while(0 < (small_count =
1661 min_t(unsigned int, (tx_bufsize - tx_put),
1662 min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail),
1663 min_t(unsigned int, info->xmit_cnt, char_count))))) {
1664
1665 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1666 &info->xmit_buf[info->xmit_tail],
1667 small_count);
1668
1669 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1670 char_count -= small_count;
1671 info->icount.tx += small_count;
1672 info->xmit_cnt -= small_count;
1673 info->xmit_tail =
1674 (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
1675 info->last_active = jiffies;
1676 info->jiffies[2] = jiffies;
1677 }
1678 #else
1679 while (info->xmit_cnt && char_count){
1680 data = info->xmit_buf[info->xmit_tail];
1681 info->xmit_cnt--;
1682 info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
1683
1684 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1685 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1686 char_count--;
1687 info->icount.tx++;
1688 info->last_active = jiffies;
1689 info->jiffies[2] = jiffies;
1690 }
1691 #endif
1692 ztxdone:
1693 if (info->xmit_cnt < WAKEUP_CHARS) {
1694 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1695 }
1696 /* Update tx_put */
1697 cy_writel(&buf_ctrl->tx_put, tx_put);
1698 }
1699 }
1700
1701 static void
1702 cyz_handle_cmd(struct cyclades_card *cinfo)
1703 {
1704 struct tty_struct *tty;
1705 struct cyclades_port *info;
1706 static volatile struct FIRM_ID __iomem *firm_id;
1707 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1708 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1709 static volatile struct CH_CTRL __iomem *ch_ctrl;
1710 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1711 uclong channel;
1712 ucchar cmd;
1713 uclong param;
1714 uclong hw_ver, fw_ver;
1715 int special_count;
1716 int delta_count;
1717
1718 firm_id = cinfo->base_addr + ID_ADDRESS;
1719 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1720 board_ctrl = &zfw_ctrl->board_ctrl;
1721 fw_ver = cy_readl(&board_ctrl->fw_version);
1722 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
1723
1724
1725 while(cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1726 special_count = 0;
1727 delta_count = 0;
1728 info = &cy_port[channel + cinfo->first_line];
1729 if((tty = info->tty) == 0) {
1730 continue;
1731 }
1732 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1733 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1734
1735 switch(cmd) {
1736 case C_CM_PR_ERROR:
1737 tty_insert_flip_char(tty, 0, TTY_PARITY);
1738 info->icount.rx++;
1739 special_count++;
1740 break;
1741 case C_CM_FR_ERROR:
1742 tty_insert_flip_char(tty, 0, TTY_FRAME);
1743 info->icount.rx++;
1744 special_count++;
1745 break;
1746 case C_CM_RXBRK:
1747 tty_insert_flip_char(tty, 0, TTY_BREAK);
1748 info->icount.rx++;
1749 special_count++;
1750 break;
1751 case C_CM_MDCD:
1752 info->icount.dcd++;
1753 delta_count++;
1754 if (info->flags & ASYNC_CHECK_CD){
1755 if ((fw_ver > 241 ?
1756 ((u_long)param) :
1757 cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
1758 cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
1759 }else{
1760 cy_sched_event(info, Cy_EVENT_HANGUP);
1761 }
1762 }
1763 break;
1764 case C_CM_MCTS:
1765 info->icount.cts++;
1766 delta_count++;
1767 break;
1768 case C_CM_MRI:
1769 info->icount.rng++;
1770 delta_count++;
1771 break;
1772 case C_CM_MDSR:
1773 info->icount.dsr++;
1774 delta_count++;
1775 break;
1776 #ifdef Z_WAKE
1777 case C_CM_IOCTLW:
1778 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1779 break;
1780 #endif
1781 #ifdef CONFIG_CYZ_INTR
1782 case C_CM_RXHIWM:
1783 case C_CM_RXNNDT:
1784 case C_CM_INTBACK2:
1785 /* Reception Interrupt */
1786 #ifdef CY_DEBUG_INTERRUPTS
1787 printk("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
1788 info->card, channel);
1789 #endif
1790 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1791 break;
1792 case C_CM_TXBEMPTY:
1793 case C_CM_TXLOWWM:
1794 case C_CM_INTBACK:
1795 /* Transmission Interrupt */
1796 #ifdef CY_DEBUG_INTERRUPTS
1797 printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
1798 info->card, channel);
1799 #endif
1800 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1801 break;
1802 #endif /* CONFIG_CYZ_INTR */
1803 case C_CM_FATAL:
1804 /* should do something with this !!! */
1805 break;
1806 default:
1807 break;
1808 }
1809 if(delta_count)
1810 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1811 if(special_count)
1812 tty_schedule_flip(tty);
1813 }
1814 }
1815
1816 #ifdef CONFIG_CYZ_INTR
1817 static irqreturn_t
1818 cyz_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1819 {
1820 struct cyclades_card *cinfo;
1821
1822 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1823 #ifdef CY_DEBUG_INTERRUPTS
1824 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1825 #endif
1826 return IRQ_NONE; /* spurious interrupt */
1827 }
1828
1829 if (!ISZLOADED(*cinfo)) {
1830 #ifdef CY_DEBUG_INTERRUPTS
1831 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1832 #endif
1833 return IRQ_NONE;
1834 }
1835
1836 /* Handle the interrupts */
1837 cyz_handle_cmd(cinfo);
1838
1839 return IRQ_HANDLED;
1840 } /* cyz_interrupt */
1841
1842 static void
1843 cyz_rx_restart(unsigned long arg)
1844 {
1845 struct cyclades_port *info = (struct cyclades_port *)arg;
1846 int retval;
1847 int card = info->card;
1848 uclong channel = (info->line) - (cy_card[card].first_line);
1849 unsigned long flags;
1850
1851 CY_LOCK(info, flags);
1852 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1853 if (retval != 0){
1854 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1855 info->line, retval);
1856 }
1857 cyz_rx_full_timer[info->line].function = NULL;
1858 CY_UNLOCK(info, flags);
1859 }
1860
1861 #else /* CONFIG_CYZ_INTR */
1862
1863 static void
1864 cyz_poll(unsigned long arg)
1865 {
1866 struct cyclades_card *cinfo;
1867 struct cyclades_port *info;
1868 struct tty_struct *tty;
1869 static volatile struct FIRM_ID *firm_id;
1870 static volatile struct ZFW_CTRL *zfw_ctrl;
1871 static volatile struct BOARD_CTRL *board_ctrl;
1872 static volatile struct CH_CTRL *ch_ctrl;
1873 static volatile struct BUF_CTRL *buf_ctrl;
1874 int card, port;
1875
1876 cyz_timerlist.expires = jiffies + (HZ);
1877 for (card = 0 ; card < NR_CARDS ; card++){
1878 cinfo = &cy_card[card];
1879
1880 if (!IS_CYC_Z(*cinfo)) continue;
1881 if (!ISZLOADED(*cinfo)) continue;
1882
1883 firm_id = cinfo->base_addr + ID_ADDRESS;
1884 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1885 board_ctrl = &(zfw_ctrl->board_ctrl);
1886
1887 /* Skip first polling cycle to avoid racing conditions with the FW */
1888 if (!cinfo->intr_enabled) {
1889 cinfo->nports = (int) cy_readl(&board_ctrl->n_channel);
1890 cinfo->intr_enabled = 1;
1891 continue;
1892 }
1893
1894 cyz_handle_cmd(cinfo);
1895
1896 for (port = 0 ; port < cinfo->nports ; port++) {
1897 info = &cy_port[ port + cinfo->first_line ];
1898 tty = info->tty;
1899 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1900 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1901
1902 if (!info->throttle)
1903 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1904 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1905 }
1906 /* poll every 'cyz_polling_cycle' period */
1907 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1908 }
1909 add_timer(&cyz_timerlist);
1910
1911 return;
1912 } /* cyz_poll */
1913
1914 #endif /* CONFIG_CYZ_INTR */
1915
1916 /********** End of block of Cyclades-Z specific code *********/
1917 /***********************************************************/
1918
1919
1920 /* This is called whenever a port becomes active;
1921 interrupts are enabled and DTR & RTS are turned on.
1922 */
1923 static int
1924 startup(struct cyclades_port * info)
1925 {
1926 unsigned long flags;
1927 int retval = 0;
1928 void __iomem *base_addr;
1929 int card,chip,channel,index;
1930 unsigned long page;
1931
1932 card = info->card;
1933 channel = (info->line) - (cy_card[card].first_line);
1934
1935 page = get_zeroed_page(GFP_KERNEL);
1936 if (!page)
1937 return -ENOMEM;
1938
1939 CY_LOCK(info, flags);
1940
1941 if (info->flags & ASYNC_INITIALIZED){
1942 free_page(page);
1943 goto errout;
1944 }
1945
1946 if (!info->type){
1947 if (info->tty){
1948 set_bit(TTY_IO_ERROR, &info->tty->flags);
1949 }
1950 free_page(page);
1951 goto errout;
1952 }
1953
1954 if (info->xmit_buf)
1955 free_page(page);
1956 else
1957 info->xmit_buf = (unsigned char *) page;
1958
1959 CY_UNLOCK(info, flags);
1960
1961 set_line_char(info);
1962
1963 if (!IS_CYC_Z(cy_card[card])) {
1964 chip = channel>>2;
1965 channel &= 0x03;
1966 index = cy_card[card].bus_index;
1967 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
1968
1969 #ifdef CY_DEBUG_OPEN
1970 printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
1971 card, chip, channel, (long)base_addr);/**/
1972 #endif
1973
1974 CY_LOCK(info, flags);
1975
1976 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1977
1978 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
1979 ? info->default_timeout : 0x02)); /* 10ms rx timeout */
1980
1981 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
1982
1983 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
1984 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
1985 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
1986
1987 #ifdef CY_DEBUG_DTR
1988 printk("cyc:startup raising DTR\n");
1989 printk(" status: 0x%x, 0x%x\n",
1990 cy_readb(base_addr+(CyMSVR1<<index)),
1991 cy_readb(base_addr+(CyMSVR2<<index)));
1992 #endif
1993
1994 cy_writeb(base_addr+(CySRER<<index),
1995 cy_readb(base_addr+(CySRER<<index)) | CyRxData);
1996 info->flags |= ASYNC_INITIALIZED;
1997
1998 if (info->tty){
1999 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2000 }
2001 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2002 info->breakon = info->breakoff = 0;
2003 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2004 info->idle_stats.in_use =
2005 info->idle_stats.recv_idle =
2006 info->idle_stats.xmit_idle = jiffies;
2007
2008 CY_UNLOCK(info, flags);
2009
2010 } else {
2011 struct FIRM_ID __iomem *firm_id;
2012 struct ZFW_CTRL __iomem *zfw_ctrl;
2013 struct BOARD_CTRL __iomem *board_ctrl;
2014 struct CH_CTRL __iomem *ch_ctrl;
2015 int retval;
2016
2017 base_addr = cy_card[card].base_addr;
2018
2019 firm_id = base_addr + ID_ADDRESS;
2020 if (!ISZLOADED(cy_card[card])){
2021 return -ENODEV;
2022 }
2023
2024 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2025 board_ctrl = &zfw_ctrl->board_ctrl;
2026 ch_ctrl = zfw_ctrl->ch_ctrl;
2027
2028 #ifdef CY_DEBUG_OPEN
2029 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2030 card, channel, (long)base_addr);/**/
2031 #endif
2032
2033 CY_LOCK(info, flags);
2034
2035 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2036 #ifdef Z_WAKE
2037 #ifdef CONFIG_CYZ_INTR
2038 cy_writel(&ch_ctrl[channel].intr_enable,
2039 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2040 C_IN_IOCTLW|
2041 C_IN_MDCD);
2042 #else
2043 cy_writel(&ch_ctrl[channel].intr_enable,
2044 C_IN_IOCTLW|
2045 C_IN_MDCD);
2046 #endif /* CONFIG_CYZ_INTR */
2047 #else
2048 #ifdef CONFIG_CYZ_INTR
2049 cy_writel(&ch_ctrl[channel].intr_enable,
2050 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2051 C_IN_MDCD);
2052 #else
2053 cy_writel(&ch_ctrl[channel].intr_enable,
2054 C_IN_MDCD);
2055 #endif /* CONFIG_CYZ_INTR */
2056 #endif /* Z_WAKE */
2057
2058 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2059 if (retval != 0){
2060 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2061 info->line, retval);
2062 }
2063
2064 /* Flush RX buffers before raising DTR and RTS */
2065 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
2066 if (retval != 0){
2067 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2068 info->line, retval);
2069 }
2070
2071 /* set timeout !!! */
2072 /* set RTS and DTR !!! */
2073 cy_writel(&ch_ctrl[channel].rs_control,
2074 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
2075 retval = cyz_issue_cmd(&cy_card[info->card],
2076 channel, C_CM_IOCTLM, 0L);
2077 if (retval != 0){
2078 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2079 info->line, retval);
2080 }
2081 #ifdef CY_DEBUG_DTR
2082 printk("cyc:startup raising Z DTR\n");
2083 #endif
2084
2085 /* enable send, recv, modem !!! */
2086
2087 info->flags |= ASYNC_INITIALIZED;
2088 if (info->tty){
2089 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2090 }
2091 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2092 info->breakon = info->breakoff = 0;
2093 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2094 info->idle_stats.in_use =
2095 info->idle_stats.recv_idle =
2096 info->idle_stats.xmit_idle = jiffies;
2097
2098 CY_UNLOCK(info, flags);
2099 }
2100
2101 #ifdef CY_DEBUG_OPEN
2102 printk(" cyc startup done\n");
2103 #endif
2104 return 0;
2105
2106 errout:
2107 CY_UNLOCK(info, flags);
2108 return retval;
2109 } /* startup */
2110
2111
2112 static void
2113 start_xmit( struct cyclades_port *info )
2114 {
2115 unsigned long flags;
2116 void __iomem *base_addr;
2117 int card,chip,channel,index;
2118
2119 card = info->card;
2120 channel = (info->line) - (cy_card[card].first_line);
2121 if (!IS_CYC_Z(cy_card[card])) {
2122 chip = channel>>2;
2123 channel &= 0x03;
2124 index = cy_card[card].bus_index;
2125 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2126
2127 CY_LOCK(info, flags);
2128 cy_writeb(base_addr+(CyCAR<<index), channel);
2129 cy_writeb(base_addr+(CySRER<<index),
2130 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
2131 CY_UNLOCK(info, flags);
2132 } else {
2133 #ifdef CONFIG_CYZ_INTR
2134 int retval;
2135
2136 CY_LOCK(info, flags);
2137 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
2138 if (retval != 0){
2139 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2140 info->line, retval);
2141 }
2142 CY_UNLOCK(info, flags);
2143 #else /* CONFIG_CYZ_INTR */
2144 /* Don't have to do anything at this time */
2145 #endif /* CONFIG_CYZ_INTR */
2146 }
2147 } /* start_xmit */
2148
2149 /*
2150 * This routine shuts down a serial port; interrupts are disabled,
2151 * and DTR is dropped if the hangup on close termio flag is on.
2152 */
2153 static void
2154 shutdown(struct cyclades_port * info)
2155 {
2156 unsigned long flags;
2157 void __iomem *base_addr;
2158 int card,chip,channel,index;
2159
2160 if (!(info->flags & ASYNC_INITIALIZED)){
2161 return;
2162 }
2163
2164 card = info->card;
2165 channel = info->line - cy_card[card].first_line;
2166 if (!IS_CYC_Z(cy_card[card])) {
2167 chip = channel>>2;
2168 channel &= 0x03;
2169 index = cy_card[card].bus_index;
2170 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2171
2172 #ifdef CY_DEBUG_OPEN
2173 printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
2174 card, chip, channel, (long)base_addr);
2175 #endif
2176
2177 CY_LOCK(info, flags);
2178
2179 /* Clear delta_msr_wait queue to avoid mem leaks. */
2180 wake_up_interruptible(&info->delta_msr_wait);
2181
2182 if (info->xmit_buf){
2183 unsigned char * temp;
2184 temp = info->xmit_buf;
2185 info->xmit_buf = NULL;
2186 free_page((unsigned long) temp);
2187 }
2188 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2189 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2190 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
2191 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
2192 #ifdef CY_DEBUG_DTR
2193 printk("cyc shutdown dropping DTR\n");
2194 printk(" status: 0x%x, 0x%x\n",
2195 cy_readb(base_addr+(CyMSVR1<<index)),
2196 cy_readb(base_addr+(CyMSVR2<<index)));
2197 #endif
2198 }
2199 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
2200 /* it may be appropriate to clear _XMIT at
2201 some later date (after testing)!!! */
2202
2203 if (info->tty){
2204 set_bit(TTY_IO_ERROR, &info->tty->flags);
2205 }
2206 info->flags &= ~ASYNC_INITIALIZED;
2207 CY_UNLOCK(info, flags);
2208 } else {
2209 struct FIRM_ID __iomem *firm_id;
2210 struct ZFW_CTRL __iomem *zfw_ctrl;
2211 struct BOARD_CTRL __iomem *board_ctrl;
2212 struct CH_CTRL __iomem *ch_ctrl;
2213 int retval;
2214
2215 base_addr = cy_card[card].base_addr;
2216 #ifdef CY_DEBUG_OPEN
2217 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2218 card, channel, (long)base_addr);
2219 #endif
2220
2221 firm_id = base_addr + ID_ADDRESS;
2222 if (!ISZLOADED(cy_card[card])) {
2223 return;
2224 }
2225
2226 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2227 board_ctrl = &zfw_ctrl->board_ctrl;
2228 ch_ctrl = zfw_ctrl->ch_ctrl;
2229
2230 CY_LOCK(info, flags);
2231
2232 if (info->xmit_buf){
2233 unsigned char * temp;
2234 temp = info->xmit_buf;
2235 info->xmit_buf = NULL;
2236 free_page((unsigned long) temp);
2237 }
2238
2239 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2240 cy_writel(&ch_ctrl[channel].rs_control,
2241 (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
2242 ~(C_RS_RTS | C_RS_DTR)));
2243 retval = cyz_issue_cmd(&cy_card[info->card],
2244 channel, C_CM_IOCTLM, 0L);
2245 if (retval != 0){
2246 printk("cyc:shutdown retval on ttyC%d was %x\n",
2247 info->line, retval);
2248 }
2249 #ifdef CY_DEBUG_DTR
2250 printk("cyc:shutdown dropping Z DTR\n");
2251 #endif
2252 }
2253
2254 if (info->tty){
2255 set_bit(TTY_IO_ERROR, &info->tty->flags);
2256 }
2257 info->flags &= ~ASYNC_INITIALIZED;
2258
2259 CY_UNLOCK(info, flags);
2260 }
2261
2262 #ifdef CY_DEBUG_OPEN
2263 printk(" cyc shutdown done\n");
2264 #endif
2265 return;
2266 } /* shutdown */
2267
2268
2269 /*
2270 * ------------------------------------------------------------
2271 * cy_open() and friends
2272 * ------------------------------------------------------------
2273 */
2274
2275 static int
2276 block_til_ready(struct tty_struct *tty, struct file * filp,
2277 struct cyclades_port *info)
2278 {
2279 DECLARE_WAITQUEUE(wait, current);
2280 struct cyclades_card *cinfo;
2281 unsigned long flags;
2282 int chip, channel,index;
2283 int retval;
2284 void __iomem *base_addr;
2285
2286 cinfo = &cy_card[info->card];
2287 channel = info->line - cinfo->first_line;
2288
2289 /*
2290 * If the device is in the middle of being closed, then block
2291 * until it's done, and then try again.
2292 */
2293 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2294 if (info->flags & ASYNC_CLOSING) {
2295 interruptible_sleep_on(&info->close_wait);
2296 }
2297 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2298 }
2299
2300 /*
2301 * If non-blocking mode is set, then make the check up front
2302 * and then exit.
2303 */
2304 if ((filp->f_flags & O_NONBLOCK) ||
2305 (tty->flags & (1 << TTY_IO_ERROR))) {
2306 info->flags |= ASYNC_NORMAL_ACTIVE;
2307 return 0;
2308 }
2309
2310 /*
2311 * Block waiting for the carrier detect and the line to become
2312 * free (i.e., not in use by the callout). While we are in
2313 * this loop, info->count is dropped by one, so that
2314 * cy_close() knows when to free things. We restore it upon
2315 * exit, either normal or abnormal.
2316 */
2317 retval = 0;
2318 add_wait_queue(&info->open_wait, &wait);
2319 #ifdef CY_DEBUG_OPEN
2320 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2321 info->line, info->count);/**/
2322 #endif
2323 CY_LOCK(info, flags);
2324 if (!tty_hung_up_p(filp))
2325 info->count--;
2326 CY_UNLOCK(info, flags);
2327 #ifdef CY_DEBUG_COUNT
2328 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2329 current->pid, info->count);
2330 #endif
2331 info->blocked_open++;
2332
2333 if (!IS_CYC_Z(*cinfo)) {
2334 chip = channel>>2;
2335 channel &= 0x03;
2336 index = cinfo->bus_index;
2337 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
2338
2339 while (1) {
2340 CY_LOCK(info, flags);
2341 if ((tty->termios->c_cflag & CBAUD)){
2342 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2343 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
2344 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
2345 #ifdef CY_DEBUG_DTR
2346 printk("cyc:block_til_ready raising DTR\n");
2347 printk(" status: 0x%x, 0x%x\n",
2348 cy_readb(base_addr+(CyMSVR1<<index)),
2349 cy_readb(base_addr+(CyMSVR2<<index)));
2350 #endif
2351 }
2352 CY_UNLOCK(info, flags);
2353
2354 set_current_state(TASK_INTERRUPTIBLE);
2355 if (tty_hung_up_p(filp)
2356 || !(info->flags & ASYNC_INITIALIZED) ){
2357 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2358 -EAGAIN : -ERESTARTSYS);
2359 break;
2360 }
2361
2362 CY_LOCK(info, flags);
2363 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2364 if (!(info->flags & ASYNC_CLOSING)
2365 && (C_CLOCAL(tty)
2366 || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
2367 CY_UNLOCK(info, flags);
2368 break;
2369 }
2370 CY_UNLOCK(info, flags);
2371
2372 if (signal_pending(current)) {
2373 retval = -ERESTARTSYS;
2374 break;
2375 }
2376 #ifdef CY_DEBUG_OPEN
2377 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2378 info->line, info->count);/**/
2379 #endif
2380 schedule();
2381 }
2382 } else {
2383 struct FIRM_ID __iomem *firm_id;
2384 struct ZFW_CTRL __iomem *zfw_ctrl;
2385 struct BOARD_CTRL __iomem *board_ctrl;
2386 struct CH_CTRL __iomem *ch_ctrl;
2387 int retval;
2388
2389 base_addr = cinfo->base_addr;
2390 firm_id = base_addr + ID_ADDRESS;
2391 if (!ISZLOADED(*cinfo)){
2392 current->state = TASK_RUNNING;
2393 remove_wait_queue(&info->open_wait, &wait);
2394 return -EINVAL;
2395 }
2396
2397 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2398 board_ctrl = &zfw_ctrl->board_ctrl;
2399 ch_ctrl = zfw_ctrl->ch_ctrl;
2400
2401 while (1) {
2402 if ((tty->termios->c_cflag & CBAUD)){
2403 cy_writel(&ch_ctrl[channel].rs_control,
2404 cy_readl(&ch_ctrl[channel].rs_control) |
2405 (C_RS_RTS | C_RS_DTR));
2406 retval = cyz_issue_cmd(&cy_card[info->card],
2407 channel, C_CM_IOCTLM, 0L);
2408 if (retval != 0){
2409 printk("cyc:block_til_ready retval on ttyC%d was %x\n",
2410 info->line, retval);
2411 }
2412 #ifdef CY_DEBUG_DTR
2413 printk("cyc:block_til_ready raising Z DTR\n");
2414 #endif
2415 }
2416
2417 set_current_state(TASK_INTERRUPTIBLE);
2418 if (tty_hung_up_p(filp)
2419 || !(info->flags & ASYNC_INITIALIZED) ){
2420 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2421 -EAGAIN : -ERESTARTSYS);
2422 break;
2423 }
2424 if (!(info->flags & ASYNC_CLOSING)
2425 && (C_CLOCAL(tty)
2426 || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
2427 break;
2428 }
2429 if (signal_pending(current)) {
2430 retval = -ERESTARTSYS;
2431 break;
2432 }
2433 #ifdef CY_DEBUG_OPEN
2434 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2435 info->line, info->count);/**/
2436 #endif
2437 schedule();
2438 }
2439 }
2440 current->state = TASK_RUNNING;
2441 remove_wait_queue(&info->open_wait, &wait);
2442 if (!tty_hung_up_p(filp)){
2443 info->count++;
2444 #ifdef CY_DEBUG_COUNT
2445 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2446 current->pid, info->count);
2447 #endif
2448 }
2449 info->blocked_open--;
2450 #ifdef CY_DEBUG_OPEN
2451 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2452 info->line, info->count);/**/
2453 #endif
2454 if (retval)
2455 return retval;
2456 info->flags |= ASYNC_NORMAL_ACTIVE;
2457 return 0;
2458 } /* block_til_ready */
2459
2460
2461 /*
2462 * This routine is called whenever a serial port is opened. It
2463 * performs the serial-specific initialization for the tty structure.
2464 */
2465 static int
2466 cy_open(struct tty_struct *tty, struct file * filp)
2467 {
2468 struct cyclades_port *info;
2469 int retval, line;
2470 unsigned long page;
2471
2472 line = tty->index;
2473 if ((line < 0) || (NR_PORTS <= line)){
2474 return -ENODEV;
2475 }
2476 info = &cy_port[line];
2477 if (info->line < 0){
2478 return -ENODEV;
2479 }
2480
2481 /* If the card's firmware hasn't been loaded,
2482 treat it as absent from the system. This
2483 will make the user pay attention.
2484 */
2485 if (IS_CYC_Z(cy_card[info->card])) {
2486 struct cyclades_card *cinfo = &cy_card[info->card];
2487 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2488
2489 if (!ISZLOADED(*cinfo)) {
2490 if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
2491 (cinfo->ctl_addr))->mail_box_0)) &&
2492 Z_FPGA_CHECK (*cinfo)) &&
2493 (ZFIRM_HLT == cy_readl (&firm_id->signature)))
2494 {
2495 printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
2496 } else {
2497 printk("cyc:Cyclades-Z firmware not yet loaded\n");
2498 }
2499 return -ENODEV;
2500 }
2501 #ifdef CONFIG_CYZ_INTR
2502 else {
2503 /* In case this Z board is operating in interrupt mode, its
2504 interrupts should be enabled as soon as the first open happens
2505 to one of its ports. */
2506 if (!cinfo->intr_enabled) {
2507 struct ZFW_CTRL __iomem *zfw_ctrl;
2508 struct BOARD_CTRL __iomem *board_ctrl;
2509
2510 zfw_ctrl = cinfo->base_addr + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
2511
2512 board_ctrl = &zfw_ctrl->board_ctrl;
2513
2514 /* Enable interrupts on the PLX chip */
2515 cy_writew(cinfo->ctl_addr+0x68,
2516 cy_readw(cinfo->ctl_addr+0x68)|0x0900);
2517 /* Enable interrupts on the FW */
2518 retval = cyz_issue_cmd(cinfo,
2519 0, C_CM_IRQ_ENBL, 0L);
2520 if (retval != 0){
2521 printk("cyc:IRQ enable retval was %x\n", retval);
2522 }
2523 cinfo->nports = (int) cy_readl (&board_ctrl->n_channel);
2524 cinfo->intr_enabled = 1;
2525 }
2526 }
2527 #endif /* CONFIG_CYZ_INTR */
2528 /* Make sure this Z port really exists in hardware */
2529 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2530 return -ENODEV;
2531 }
2532 #ifdef CY_DEBUG_OTHER
2533 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2534 #endif
2535 tty->driver_data = info;
2536 info->tty = tty;
2537 if (serial_paranoia_check(info, tty->name, "cy_open")){
2538 return -ENODEV;
2539 }
2540 #ifdef CY_DEBUG_OPEN
2541 printk("cyc:cy_open ttyC%d, count = %d\n",
2542 info->line, info->count);/**/
2543 #endif
2544 info->count++;
2545 #ifdef CY_DEBUG_COUNT
2546 printk("cyc:cy_open (%d): incrementing count to %d\n",
2547 current->pid, info->count);
2548 #endif
2549 if (!tmp_buf) {
2550 page = get_zeroed_page(GFP_KERNEL);
2551 if (!page)
2552 return -ENOMEM;
2553 if (tmp_buf)
2554 free_page(page);
2555 else
2556 tmp_buf = (unsigned char *) page;
2557 }
2558
2559 /*
2560 * If the port is the middle of closing, bail out now
2561 */
2562 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2563 if (info->flags & ASYNC_CLOSING)
2564 interruptible_sleep_on(&info->close_wait);
2565 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2566 }
2567
2568 /*
2569 * Start up serial port
2570 */
2571 retval = startup(info);
2572 if (retval){
2573 return retval;
2574 }
2575
2576 retval = block_til_ready(tty, filp, info);
2577 if (retval) {
2578 #ifdef CY_DEBUG_OPEN
2579 printk("cyc:cy_open returning after block_til_ready with %d\n",
2580 retval);
2581 #endif
2582 return retval;
2583 }
2584
2585 info->throttle = 0;
2586
2587 #ifdef CY_DEBUG_OPEN
2588 printk(" cyc:cy_open done\n");/**/
2589 #endif
2590
2591 return 0;
2592 } /* cy_open */
2593
2594
2595 /*
2596 * cy_wait_until_sent() --- wait until the transmitter is empty
2597 */
2598 static void
2599 cy_wait_until_sent(struct tty_struct *tty, int timeout)
2600 {
2601 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
2602 void __iomem *base_addr;
2603 int card,chip,channel,index;
2604 unsigned long orig_jiffies;
2605 int char_time;
2606
2607 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2608 return;
2609
2610 if (info->xmit_fifo_size == 0)
2611 return; /* Just in case.... */
2612
2613
2614 orig_jiffies = jiffies;
2615 /*
2616 * Set the check interval to be 1/5 of the estimated time to
2617 * send a single character, and make it at least 1. The check
2618 * interval should also be less than the timeout.
2619 *
2620 * Note: we have to use pretty tight timings here to satisfy
2621 * the NIST-PCTS.
2622 */
2623 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
2624 char_time = char_time / 5;
2625 if (char_time <= 0)
2626 char_time = 1;
2627 if (timeout < 0)
2628 timeout = 0;
2629 if (timeout)
2630 char_time = min(char_time, timeout);
2631 /*
2632 * If the transmitter hasn't cleared in twice the approximate
2633 * amount of time to send the entire FIFO, it probably won't
2634 * ever clear. This assumes the UART isn't doing flow
2635 * control, which is currently the case. Hence, if it ever
2636 * takes longer than info->timeout, this is probably due to a
2637 * UART bug of some kind. So, we clamp the timeout parameter at
2638 * 2*info->timeout.
2639 */
2640 if (!timeout || timeout > 2*info->timeout)
2641 timeout = 2*info->timeout;
2642 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2643 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2644 printk("jiff=%lu...", jiffies);
2645 #endif
2646 card = info->card;
2647 channel = (info->line) - (cy_card[card].first_line);
2648 if (!IS_CYC_Z(cy_card[card])) {
2649 chip = channel>>2;
2650 channel &= 0x03;
2651 index = cy_card[card].bus_index;
2652 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2653 while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
2654 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2655 printk("Not clean (jiff=%lu)...", jiffies);
2656 #endif
2657 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2658 break;
2659 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2660 break;
2661 }
2662 } else {
2663 // Nothing to do!
2664 }
2665 /* Run one more char cycle */
2666 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2667 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2668 printk("Clean (jiff=%lu)...done\n", jiffies);
2669 #endif
2670 }
2671
2672 /*
2673 * This routine is called when a particular tty device is closed.
2674 */
2675 static void
2676 cy_close(struct tty_struct *tty, struct file *filp)
2677 {
2678 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2679 unsigned long flags;
2680
2681 #ifdef CY_DEBUG_OTHER
2682 printk("cyc:cy_close ttyC%d\n", info->line);
2683 #endif
2684
2685 if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
2686 return;
2687 }
2688
2689 CY_LOCK(info, flags);
2690 /* If the TTY is being hung up, nothing to do */
2691 if (tty_hung_up_p(filp)) {
2692 CY_UNLOCK(info, flags);
2693 return;
2694 }
2695
2696 #ifdef CY_DEBUG_OPEN
2697 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2698 #endif
2699 if ((tty->count == 1) && (info->count != 1)) {
2700 /*
2701 * Uh, oh. tty->count is 1, which means that the tty
2702 * structure will be freed. Info->count should always
2703 * be one in these conditions. If it's greater than
2704 * one, we've got real problems, since it means the
2705 * serial port won't be shutdown.
2706 */
2707 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2708 "info->count is %d\n", info->count);
2709 info->count = 1;
2710 }
2711 #ifdef CY_DEBUG_COUNT
2712 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2713 current->pid, info->count - 1);
2714 #endif
2715 if (--info->count < 0) {
2716 #ifdef CY_DEBUG_COUNT
2717 printk("cyc:cyc_close setting count to 0\n");
2718 #endif
2719 info->count = 0;
2720 }
2721 if (info->count) {
2722 CY_UNLOCK(info, flags);
2723 return;
2724 }
2725 info->flags |= ASYNC_CLOSING;
2726
2727 /*
2728 * Now we wait for the transmit buffer to clear; and we notify
2729 * the line discipline to only process XON/XOFF characters.
2730 */
2731 tty->closing = 1;
2732 CY_UNLOCK(info, flags);
2733 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2734 tty_wait_until_sent(tty, info->closing_wait);
2735 }
2736 CY_LOCK(info, flags);
2737
2738 if (!IS_CYC_Z(cy_card[info->card])) {
2739 int channel = info->line - cy_card[info->card].first_line;
2740 int index = cy_card[info->card].bus_index;
2741 void __iomem *base_addr = cy_card[info->card].base_addr + (cy_chip_offset[channel>>2] << index);
2742 /* Stop accepting input */
2743 channel &= 0x03;
2744 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2745 cy_writeb(base_addr+(CySRER<<index),
2746 cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
2747 if (info->flags & ASYNC_INITIALIZED) {
2748 /* Waiting for on-board buffers to be empty before closing
2749 the port */
2750 CY_UNLOCK(info, flags);
2751 cy_wait_until_sent(tty, info->timeout);
2752 CY_LOCK(info, flags);
2753 }
2754 } else {
2755 #ifdef Z_WAKE
2756 /* Waiting for on-board buffers to be empty before closing the port */
2757 void __iomem *base_addr = cy_card[info->card].base_addr;
2758 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2759 struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2760 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2761 int channel = info->line - cy_card[info->card].first_line;
2762 int retval;
2763
2764 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2765 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2766 C_CM_IOCTLW, 0L);
2767 if (retval != 0){
2768 printk("cyc:cy_close retval on ttyC%d was %x\n",
2769 info->line, retval);
2770 }
2771 CY_UNLOCK(info, flags);
2772 interruptible_sleep_on(&info->shutdown_wait);
2773 CY_LOCK(info, flags);
2774 }
2775 #endif
2776 }
2777
2778 CY_UNLOCK(info, flags);
2779 shutdown(info);
2780 if (tty->driver->flush_buffer)
2781 tty->driver->flush_buffer(tty);
2782 tty_ldisc_flush(tty);
2783 CY_LOCK(info, flags);
2784
2785 tty->closing = 0;
2786 info->event = 0;
2787 info->tty = NULL;
2788 if (info->blocked_open) {
2789 CY_UNLOCK(info, flags);
2790 if (info->close_delay) {
2791 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2792 }
2793 wake_up_interruptible(&info->open_wait);
2794 CY_LOCK(info, flags);
2795 }
2796 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2797 wake_up_interruptible(&info->close_wait);
2798
2799 #ifdef CY_DEBUG_OTHER
2800 printk(" cyc:cy_close done\n");
2801 #endif
2802
2803 CY_UNLOCK(info, flags);
2804 return;
2805 } /* cy_close */
2806
2807
2808 /* This routine gets called when tty_write has put something into
2809 * the write_queue. The characters may come from user space or
2810 * kernel space.
2811 *
2812 * This routine will return the number of characters actually
2813 * accepted for writing.
2814 *
2815 * If the port is not already transmitting stuff, start it off by
2816 * enabling interrupts. The interrupt service routine will then
2817 * ensure that the characters are sent.
2818 * If the port is already active, there is no need to kick it.
2819 *
2820 */
2821 static int
2822 cy_write(struct tty_struct * tty, const unsigned char *buf, int count)
2823 {
2824 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2825 unsigned long flags;
2826 int c, ret = 0;
2827
2828 #ifdef CY_DEBUG_IO
2829 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2830 #endif
2831
2832 if (serial_paranoia_check(info, tty->name, "cy_write")){
2833 return 0;
2834 }
2835
2836 if (!tty || !info->xmit_buf || !tmp_buf){
2837 return 0;
2838 }
2839
2840 CY_LOCK(info, flags);
2841 while (1) {
2842 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2843 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2844
2845 if (c <= 0)
2846 break;
2847
2848 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2849 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
2850 info->xmit_cnt += c;
2851 buf += c;
2852 count -= c;
2853 ret += c;
2854 }
2855 CY_UNLOCK(info, flags);
2856
2857 info->idle_stats.xmit_bytes += ret;
2858 info->idle_stats.xmit_idle = jiffies;
2859
2860 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2861 start_xmit(info);
2862 }
2863 return ret;
2864 } /* cy_write */
2865
2866
2867 /*
2868 * This routine is called by the kernel to write a single
2869 * character to the tty device. If the kernel uses this routine,
2870 * it must call the flush_chars() routine (if defined) when it is
2871 * done stuffing characters into the driver. If there is no room
2872 * in the queue, the character is ignored.
2873 */
2874 static void
2875 cy_put_char(struct tty_struct *tty, unsigned char ch)
2876 {
2877 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2878 unsigned long flags;
2879
2880 #ifdef CY_DEBUG_IO
2881 printk("cyc:cy_put_char ttyC%d\n", info->line);
2882 #endif
2883
2884 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2885 return;
2886
2887 if (!tty || !info->xmit_buf)
2888 return;
2889
2890 CY_LOCK(info, flags);
2891 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2892 CY_UNLOCK(info, flags);
2893 return;
2894 }
2895
2896 info->xmit_buf[info->xmit_head++] = ch;
2897 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2898 info->xmit_cnt++;
2899 info->idle_stats.xmit_bytes++;
2900 info->idle_stats.xmit_idle = jiffies;
2901 CY_UNLOCK(info, flags);
2902 } /* cy_put_char */
2903
2904
2905 /*
2906 * This routine is called by the kernel after it has written a
2907 * series of characters to the tty device using put_char().
2908 */
2909 static void
2910 cy_flush_chars(struct tty_struct *tty)
2911 {
2912 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2913
2914 #ifdef CY_DEBUG_IO
2915 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2916 #endif
2917
2918 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2919 return;
2920
2921 if (info->xmit_cnt <= 0 || tty->stopped
2922 || tty->hw_stopped || !info->xmit_buf)
2923 return;
2924
2925 start_xmit(info);
2926 } /* cy_flush_chars */
2927
2928
2929 /*
2930 * This routine returns the numbers of characters the tty driver
2931 * will accept for queuing to be written. This number is subject
2932 * to change as output buffers get emptied, or if the output flow
2933 * control is activated.
2934 */
2935 static int
2936 cy_write_room(struct tty_struct *tty)
2937 {
2938 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2939 int ret;
2940
2941 #ifdef CY_DEBUG_IO
2942 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2943 #endif
2944
2945 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2946 return 0;
2947 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2948 if (ret < 0)
2949 ret = 0;
2950 return ret;
2951 } /* cy_write_room */
2952
2953
2954 static int
2955 cy_chars_in_buffer(struct tty_struct *tty)
2956 {
2957 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2958 int card, channel;
2959
2960 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2961 return 0;
2962
2963 card = info->card;
2964 channel = (info->line) - (cy_card[card].first_line);
2965
2966 #ifdef Z_EXT_CHARS_IN_BUFFER
2967 if (!IS_CYC_Z(cy_card[card])) {
2968 #endif /* Z_EXT_CHARS_IN_BUFFER */
2969 #ifdef CY_DEBUG_IO
2970 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2971 info->line, info->xmit_cnt); /* */
2972 #endif
2973 return info->xmit_cnt;
2974 #ifdef Z_EXT_CHARS_IN_BUFFER
2975 } else {
2976 static volatile struct FIRM_ID *firm_id;
2977 static volatile struct ZFW_CTRL *zfw_ctrl;
2978 static volatile struct CH_CTRL *ch_ctrl;
2979 static volatile struct BUF_CTRL *buf_ctrl;
2980 int char_count;
2981 volatile uclong tx_put, tx_get, tx_bufsize;
2982
2983 firm_id = cy_card[card].base_addr + ID_ADDRESS;
2984 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2985 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2986 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2987
2988 tx_get = cy_readl(&buf_ctrl->tx_get);
2989 tx_put = cy_readl(&buf_ctrl->tx_put);
2990 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
2991 if (tx_put >= tx_get)
2992 char_count = tx_put - tx_get;
2993 else
2994 char_count = tx_put - tx_get + tx_bufsize;
2995 #ifdef CY_DEBUG_IO
2996 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
2997 info->line, info->xmit_cnt + char_count); /* */
2998 #endif
2999 return (info->xmit_cnt + char_count);
3000 }
3001 #endif /* Z_EXT_CHARS_IN_BUFFER */
3002 } /* cy_chars_in_buffer */
3003
3004
3005 /*
3006 * ------------------------------------------------------------
3007 * cy_ioctl() and friends
3008 * ------------------------------------------------------------
3009 */
3010
3011 static void
3012 cyy_baud_calc(struct cyclades_port *info, uclong baud)
3013 {
3014 int co, co_val, bpr;
3015 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000);
3016
3017 if (baud == 0) {
3018 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3019 return;
3020 }
3021
3022 /* determine which prescaler to use */
3023 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3024 if (cy_clock / co_val / baud > 63)
3025 break;
3026 }
3027
3028 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3029 if (bpr > 255)
3030 bpr = 255;
3031
3032 info->tbpr = info->rbpr = bpr;
3033 info->tco = info->rco = co;
3034 }
3035
3036 /*
3037 * This routine finds or computes the various line characteristics.
3038 * It used to be called config_setup
3039 */
3040 static void
3041 set_line_char(struct cyclades_port * info)
3042 {
3043 unsigned long flags;
3044 void __iomem *base_addr;
3045 int card,chip,channel,index;
3046 unsigned cflag, iflag;
3047 unsigned short chip_number;
3048 int baud, baud_rate = 0;
3049 int i;
3050
3051
3052 if (!info->tty || !info->tty->termios){
3053 return;
3054 }
3055 if (info->line == -1){
3056 return;
3057 }
3058 cflag = info->tty->termios->c_cflag;
3059 iflag = info->tty->termios->c_iflag;
3060
3061 /*
3062 * Set up the tty->alt_speed kludge
3063 */
3064 if (info->tty) {
3065 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3066 info->tty->alt_speed = 57600;
3067 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3068 info->tty->alt_speed = 115200;
3069 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3070 info->tty->alt_speed = 230400;
3071 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3072 info->tty->alt_speed = 460800;
3073 }
3074
3075 card = info->card;
3076 channel = (info->line) - (cy_card[card].first_line);
3077 chip_number = channel / 4;
3078
3079 if (!IS_CYC_Z(cy_card[card])) {
3080
3081 index = cy_card[card].bus_index;
3082
3083 /* baud rate */
3084 baud = tty_get_baud_rate(info->tty);
3085 if ((baud == 38400) &&
3086 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3087 if (info->custom_divisor)
3088 baud_rate = info->baud / info->custom_divisor;
3089 else
3090 baud_rate = info->baud;
3091 } else if (baud > CD1400_MAX_SPEED) {
3092 baud = CD1400_MAX_SPEED;
3093 }
3094 /* find the baud index */
3095 for (i = 0; i < 20; i++) {
3096 if (baud == baud_table[i]) {
3097 break;
3098 }
3099 }
3100 if (i == 20) {
3101 i = 19; /* CD1400_MAX_SPEED */
3102 }
3103
3104 if ((baud == 38400) &&
3105 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3106 cyy_baud_calc(info, baud_rate);
3107 } else {
3108 if(info->chip_rev >= CD1400_REV_J) {
3109 /* It is a CD1400 rev. J or later */
3110 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3111 info->tco = baud_co_60[i]; /* Tx CO */
3112 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3113 info->rco = baud_co_60[i]; /* Rx CO */
3114 } else {
3115 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3116 info->tco = baud_co_25[i]; /* Tx CO */
3117 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3118 info->rco = baud_co_25[i]; /* Rx CO */
3119 }
3120 }
3121 if (baud_table[i] == 134) {
3122 /* get it right for 134.5 baud */
3123 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3124 } else if ((baud == 38400) &&
3125 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3126 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3127 } else if (baud_table[i]) {
3128 info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
3129 /* this needs to be propagated into the card info */
3130 } else {
3131 info->timeout = 0;
3132 }
3133 /* By tradition (is it a standard?) a baud rate of zero
3134 implies the line should be/has been closed. A bit
3135 later in this routine such a test is performed. */
3136
3137 /* byte size and parity */
3138 info->cor5 = 0;
3139 info->cor4 = 0;
3140 info->cor3 = (info->default_threshold
3141 ? info->default_threshold
3142 : baud_cor3[i]); /* receive threshold */
3143 info->cor2 = CyETC;
3144 switch(cflag & CSIZE){
3145 case CS5:
3146 info->cor1 = Cy_5_BITS;
3147 break;
3148 case CS6:
3149 info->cor1 = Cy_6_BITS;
3150 break;
3151 case CS7:
3152 info->cor1 = Cy_7_BITS;
3153 break;
3154 case CS8:
3155 info->cor1 = Cy_8_BITS;
3156 break;
3157 }
3158 if(cflag & CSTOPB){
3159 info->cor1 |= Cy_2_STOP;
3160 }
3161 if (cflag & PARENB){
3162 if (cflag & PARODD){
3163 info->cor1 |= CyPARITY_O;
3164 }else{
3165 info->cor1 |= CyPARITY_E;
3166 }
3167 }else{
3168 info->cor1 |= CyPARITY_NONE;
3169 }
3170
3171 /* CTS flow control flag */
3172 if (cflag & CRTSCTS){
3173 info->flags |= ASYNC_CTS_FLOW;
3174 info->cor2 |= CyCtsAE;
3175 }else{
3176 info->flags &= ~ASYNC_CTS_FLOW;
3177 info->cor2 &= ~CyCtsAE;
3178 }
3179 if (cflag & CLOCAL)
3180 info->flags &= ~ASYNC_CHECK_CD;
3181 else
3182 info->flags |= ASYNC_CHECK_CD;
3183
3184 /***********************************************
3185 The hardware option, CyRtsAO, presents RTS when
3186 the chip has characters to send. Since most modems
3187 use RTS as reverse (inbound) flow control, this
3188 option is not used. If inbound flow control is
3189 necessary, DTR can be programmed to provide the
3190 appropriate signals for use with a non-standard
3191 cable. Contact Marcio Saito for details.
3192 ***********************************************/
3193
3194 chip = channel>>2;
3195 channel &= 0x03;
3196 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3197
3198 CY_LOCK(info, flags);
3199 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3200
3201 /* tx and rx baud rate */
3202
3203 cy_writeb(base_addr+(CyTCOR<<index), info->tco);
3204 cy_writeb(base_addr+(CyTBPR<<index), info->tbpr);
3205 cy_writeb(base_addr+(CyRCOR<<index), info->rco);
3206 cy_writeb(base_addr+(CyRBPR<<index), info->rbpr);
3207
3208 /* set line characteristics according configuration */
3209
3210 cy_writeb(base_addr+(CySCHR1<<index),
3211 START_CHAR(info->tty));
3212 cy_writeb(base_addr+(CySCHR2<<index),
3213 STOP_CHAR(info->tty));
3214 cy_writeb(base_addr+(CyCOR1<<index), info->cor1);
3215 cy_writeb(base_addr+(CyCOR2<<index), info->cor2);
3216 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3217 cy_writeb(base_addr+(CyCOR4<<index), info->cor4);
3218 cy_writeb(base_addr+(CyCOR5<<index), info->cor5);
3219
3220 cyy_issue_cmd(base_addr,
3221 CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
3222
3223 cy_writeb(base_addr+(CyCAR<<index),
3224 (u_char)channel); /* !!! Is this needed? */
3225 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
3226 ? info->default_timeout
3227 : 0x02)); /* 10ms rx timeout */
3228
3229 if (C_CLOCAL(info->tty)) {
3230 /* without modem intr */
3231 cy_writeb(base_addr+(CySRER<<index),
3232 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3233 /* act on 1->0 modem transitions */
3234 if ((cflag & CRTSCTS) && info->rflow) {
3235 cy_writeb(base_addr+(CyMCOR1<<index),
3236 (CyCTS|rflow_thr[i]));
3237 } else {
3238 cy_writeb(base_addr+(CyMCOR1<<index), CyCTS);
3239 }
3240 /* act on 0->1 modem transitions */
3241 cy_writeb(base_addr+(CyMCOR2<<index), CyCTS);
3242 } else {
3243 /* without modem intr */
3244 cy_writeb(base_addr+(CySRER<<index),
3245 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3246 /* act on 1->0 modem transitions */
3247 if ((cflag & CRTSCTS) && info->rflow) {
3248 cy_writeb(base_addr+(CyMCOR1<<index),
3249 (CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
3250 } else {
3251 cy_writeb(base_addr+(CyMCOR1<<index),
3252 CyDSR|CyCTS|CyRI|CyDCD);
3253 }
3254 /* act on 0->1 modem transitions */
3255 cy_writeb(base_addr+(CyMCOR2<<index),
3256 CyDSR|CyCTS|CyRI|CyDCD);
3257 }
3258
3259 if(i == 0){ /* baud rate is zero, turn off line */
3260 if (info->rtsdtr_inv) {
3261 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3262 } else {
3263 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3264 }
3265 #ifdef CY_DEBUG_DTR
3266 printk("cyc:set_line_char dropping DTR\n");
3267 printk(" status: 0x%x, 0x%x\n",
3268 cy_readb(base_addr+(CyMSVR1<<index)),
3269 cy_readb(base_addr+(CyMSVR2<<index)));
3270 #endif
3271 }else{
3272 if (info->rtsdtr_inv) {
3273 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3274 } else {
3275 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3276 }
3277 #ifdef CY_DEBUG_DTR
3278 printk("cyc:set_line_char raising DTR\n");
3279 printk(" status: 0x%x, 0x%x\n",
3280 cy_readb(base_addr+(CyMSVR1<<index)),
3281 cy_readb(base_addr+(CyMSVR2<<index)));
3282 #endif
3283 }
3284
3285 if (info->tty){
3286 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3287 }
3288 CY_UNLOCK(info, flags);
3289
3290 } else {
3291 struct FIRM_ID __iomem *firm_id;
3292 struct ZFW_CTRL __iomem *zfw_ctrl;
3293 struct BOARD_CTRL __iomem *board_ctrl;
3294 struct CH_CTRL __iomem *ch_ctrl;
3295 struct BUF_CTRL __iomem *buf_ctrl;
3296 uclong sw_flow;
3297 int retval;
3298
3299 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3300 if (!ISZLOADED(cy_card[card])) {
3301 return;
3302 }
3303
3304 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3305 board_ctrl = &zfw_ctrl->board_ctrl;
3306 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3307 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3308
3309 /* baud rate */
3310 baud = tty_get_baud_rate(info->tty);
3311 if ((baud == 38400) &&
3312 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3313 if (info->custom_divisor)
3314 baud_rate = info->baud / info->custom_divisor;
3315 else
3316 baud_rate = info->baud;
3317 } else if (baud > CYZ_MAX_SPEED) {
3318 baud = CYZ_MAX_SPEED;
3319 }
3320 cy_writel(&ch_ctrl->comm_baud , baud);
3321
3322 if (baud == 134) {
3323 /* get it right for 134.5 baud */
3324 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3325 } else if ((baud == 38400) &&
3326 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3327 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3328 } else if (baud) {
3329 info->timeout = (info->xmit_fifo_size*HZ*15/baud) + 2;
3330 /* this needs to be propagated into the card info */
3331 } else {
3332 info->timeout = 0;
3333 }
3334
3335 /* byte size and parity */
3336 switch(cflag & CSIZE){
3337 case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
3338 case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
3339 case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
3340 case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
3341 }
3342 if(cflag & CSTOPB){
3343 cy_writel(&ch_ctrl->comm_data_l,
3344 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3345 }else{
3346 cy_writel(&ch_ctrl->comm_data_l,
3347 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3348 }
3349 if (cflag & PARENB){
3350 if (cflag & PARODD){
3351 cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
3352 }else{
3353 cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
3354 }
3355 }else{
3356 cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
3357 }
3358
3359 /* CTS flow control flag */
3360 if (cflag & CRTSCTS){
3361 cy_writel(&ch_ctrl->hw_flow,
3362 cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3363 }else{
3364 cy_writel(&ch_ctrl->hw_flow,
3365 cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3366 }
3367 /* As the HW flow control is done in firmware, the driver doesn't
3368 need to care about it */
3369 info->flags &= ~ASYNC_CTS_FLOW;
3370
3371 /* XON/XOFF/XANY flow control flags */
3372 sw_flow = 0;
3373 if (iflag & IXON){
3374 sw_flow |= C_FL_OXX;
3375 if (iflag & IXANY)
3376 sw_flow |= C_FL_OIXANY;
3377 }
3378 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3379
3380 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3381 if (retval != 0){
3382 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3383 info->line, retval);
3384 }
3385
3386 /* CD sensitivity */
3387 if (cflag & CLOCAL){
3388 info->flags &= ~ASYNC_CHECK_CD;
3389 }else{
3390 info->flags |= ASYNC_CHECK_CD;
3391 }
3392
3393 if(baud == 0){ /* baud rate is zero, turn off line */
3394 cy_writel(&ch_ctrl->rs_control,
3395 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3396 #ifdef CY_DEBUG_DTR
3397 printk("cyc:set_line_char dropping Z DTR\n");
3398 #endif
3399 }else{
3400 cy_writel(&ch_ctrl->rs_control,
3401 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3402 #ifdef CY_DEBUG_DTR
3403 printk("cyc:set_line_char raising Z DTR\n");
3404 #endif
3405 }
3406
3407 retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
3408 if (retval != 0){
3409 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3410 info->line, retval);
3411 }
3412
3413 if (info->tty){
3414 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3415 }
3416 }
3417 } /* set_line_char */
3418
3419
3420 static int
3421 get_serial_info(struct cyclades_port * info,
3422 struct serial_struct __user * retinfo)
3423 {
3424 struct serial_struct tmp;
3425 struct cyclades_card *cinfo = &cy_card[info->card];
3426
3427 if (!retinfo)
3428 return -EFAULT;
3429 memset(&tmp, 0, sizeof(tmp));
3430 tmp.type = info->type;
3431 tmp.line = info->line;
3432 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3433 tmp.irq = cinfo->irq;
3434 tmp.flags = info->flags;
3435 tmp.close_delay = info->close_delay;
3436 tmp.baud_base = info->baud;
3437 tmp.custom_divisor = info->custom_divisor;
3438 tmp.hub6 = 0; /*!!!*/
3439 return copy_to_user(retinfo,&tmp,sizeof(*retinfo))?-EFAULT:0;
3440 } /* get_serial_info */
3441
3442
3443 static int
3444 set_serial_info(struct cyclades_port * info,
3445 struct serial_struct __user * new_info)
3446 {
3447 struct serial_struct new_serial;
3448 struct cyclades_port old_info;
3449
3450 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
3451 return -EFAULT;
3452 old_info = *info;
3453
3454 if (!capable(CAP_SYS_ADMIN)) {
3455 if ((new_serial.close_delay != info->close_delay) ||
3456 (new_serial.baud_base != info->baud) ||
3457 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
3458 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
3459 return -EPERM;
3460 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
3461 (new_serial.flags & ASYNC_USR_MASK));
3462 info->baud = new_serial.baud_base;
3463 info->custom_divisor = new_serial.custom_divisor;
3464 goto check_and_exit;
3465 }
3466
3467
3468 /*
3469 * OK, past this point, all the error checking has been done.
3470 * At this point, we start making changes.....
3471 */
3472
3473 info->baud = new_serial.baud_base;
3474 info->custom_divisor = new_serial.custom_divisor;
3475 info->flags = ((info->flags & ~ASYNC_FLAGS) |
3476 (new_serial.flags & ASYNC_FLAGS));
3477 info->close_delay = new_serial.close_delay * HZ/100;
3478 info->closing_wait = new_serial.closing_wait * HZ/100;
3479
3480 check_and_exit:
3481 if (info->flags & ASYNC_INITIALIZED){
3482 set_line_char(info);
3483 return 0;
3484 }else{
3485 return startup(info);
3486 }
3487 } /* set_serial_info */
3488
3489 /*
3490 * get_lsr_info - get line status register info
3491 *
3492 * Purpose: Let user call ioctl() to get info when the UART physically
3493 * is emptied. On bus types like RS485, the transmitter must
3494 * release the bus after transmitting. This must be done when
3495 * the transmit shift register is empty, not be done when the
3496 * transmit holding register is empty. This functionality
3497 * allows an RS485 driver to be written in user space.
3498 */
3499 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3500 {
3501 int card, chip, channel, index;
3502 unsigned char status;
3503 unsigned int result;
3504 unsigned long flags;
3505 void __iomem *base_addr;
3506
3507 card = info->card;
3508 channel = (info->line) - (cy_card[card].first_line);
3509 if (!IS_CYC_Z(cy_card[card])) {
3510 chip = channel>>2;
3511 channel &= 0x03;
3512 index = cy_card[card].bus_index;
3513 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3514
3515 CY_LOCK(info, flags);
3516 status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
3517 CY_UNLOCK(info, flags);
3518 result = (status ? 0 : TIOCSER_TEMT);
3519 } else {
3520 /* Not supported yet */
3521 return -EINVAL;
3522 }
3523 return put_user(result, (unsigned long __user *) value);
3524 }
3525
3526 static int
3527 cy_tiocmget(struct tty_struct *tty, struct file *file)
3528 {
3529 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3530 int card,chip,channel,index;
3531 void __iomem *base_addr;
3532 unsigned long flags;
3533 unsigned char status;
3534 unsigned long lstatus;
3535 unsigned int result;
3536 struct FIRM_ID __iomem *firm_id;
3537 struct ZFW_CTRL __iomem *zfw_ctrl;
3538 struct BOARD_CTRL __iomem *board_ctrl;
3539 struct CH_CTRL __iomem *ch_ctrl;
3540
3541 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3542 return -ENODEV;
3543
3544 card = info->card;
3545 channel = (info->line) - (cy_card[card].first_line);
3546 if (!IS_CYC_Z(cy_card[card])) {
3547 chip = channel>>2;
3548 channel &= 0x03;
3549 index = cy_card[card].bus_index;
3550 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3551
3552 CY_LOCK(info, flags);
3553 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3554 status = cy_readb(base_addr+(CyMSVR1<<index));
3555 status |= cy_readb(base_addr+(CyMSVR2<<index));
3556 CY_UNLOCK(info, flags);
3557
3558 if (info->rtsdtr_inv) {
3559 result = ((status & CyRTS) ? TIOCM_DTR : 0)
3560 | ((status & CyDTR) ? TIOCM_RTS : 0);
3561 } else {
3562 result = ((status & CyRTS) ? TIOCM_RTS : 0)
3563 | ((status & CyDTR) ? TIOCM_DTR : 0);
3564 }
3565 result |= ((status & CyDCD) ? TIOCM_CAR : 0)
3566 | ((status & CyRI) ? TIOCM_RNG : 0)
3567 | ((status & CyDSR) ? TIOCM_DSR : 0)
3568 | ((status & CyCTS) ? TIOCM_CTS : 0);
3569 } else {
3570 base_addr = cy_card[card].base_addr;
3571
3572 if (cy_card[card].num_chips != -1){
3573 return -EINVAL;
3574 }
3575
3576 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3577 if (ISZLOADED(cy_card[card])) {
3578 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3579 board_ctrl = &zfw_ctrl->board_ctrl;
3580 ch_ctrl = zfw_ctrl->ch_ctrl;
3581 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3582 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0)
3583 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0)
3584 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0)
3585 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0)
3586 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0)
3587 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3588 }else{
3589 result = 0;
3590 return -ENODEV;
3591 }
3592
3593 }
3594 return result;
3595 } /* cy_tiomget */
3596
3597
3598 static int
3599 cy_tiocmset(struct tty_struct *tty, struct file *file,
3600 unsigned int set, unsigned int clear)
3601 {
3602 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3603 int card,chip,channel,index;
3604 void __iomem *base_addr;
3605 unsigned long flags;
3606 struct FIRM_ID __iomem *firm_id;
3607 struct ZFW_CTRL __iomem *zfw_ctrl;
3608 struct BOARD_CTRL __iomem *board_ctrl;
3609 struct CH_CTRL __iomem *ch_ctrl;
3610 int retval;
3611
3612 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3613 return -ENODEV;
3614
3615 card = info->card;
3616 channel = (info->line) - (cy_card[card].first_line);
3617 if (!IS_CYC_Z(cy_card[card])) {
3618 chip = channel>>2;
3619 channel &= 0x03;
3620 index = cy_card[card].bus_index;
3621 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3622
3623 if (set & TIOCM_RTS){
3624 CY_LOCK(info, flags);
3625 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3626 if (info->rtsdtr_inv) {
3627 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3628 } else {
3629 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3630 }
3631 CY_UNLOCK(info, flags);
3632 }
3633 if (clear & TIOCM_RTS) {
3634 CY_LOCK(info, flags);
3635 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3636 if (info->rtsdtr_inv) {
3637 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3638 } else {
3639 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3640 }
3641 CY_UNLOCK(info, flags);
3642 }
3643 if (set & TIOCM_DTR){
3644 CY_LOCK(info, flags);
3645 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3646 if (info->rtsdtr_inv) {
3647 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3648 } else {
3649 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3650 }
3651 #ifdef CY_DEBUG_DTR
3652 printk("cyc:set_modem_info raising DTR\n");
3653 printk(" status: 0x%x, 0x%x\n",
3654 cy_readb(base_addr+(CyMSVR1<<index)),
3655 cy_readb(base_addr+(CyMSVR2<<index)));
3656 #endif
3657 CY_UNLOCK(info, flags);
3658 }
3659 if (clear & TIOCM_DTR) {
3660 CY_LOCK(info, flags);
3661 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3662 if (info->rtsdtr_inv) {
3663 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3664 } else {
3665 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3666 }
3667
3668 #ifdef CY_DEBUG_DTR
3669 printk("cyc:set_modem_info dropping DTR\n");
3670 printk(" status: 0x%x, 0x%x\n",
3671 cy_readb(base_addr+(CyMSVR1<<index)),
3672 cy_readb(base_addr+(CyMSVR2<<index)));
3673 #endif
3674 CY_UNLOCK(info, flags);
3675 }
3676 } else {
3677 base_addr = cy_card[card].base_addr;
3678
3679 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3680 if (ISZLOADED(cy_card[card])) {
3681 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3682 board_ctrl = &zfw_ctrl->board_ctrl;
3683 ch_ctrl = zfw_ctrl->ch_ctrl;
3684
3685 if (set & TIOCM_RTS){
3686 CY_LOCK(info, flags);
3687 cy_writel(&ch_ctrl[channel].rs_control,
3688 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
3689 CY_UNLOCK(info, flags);
3690 }
3691 if (clear & TIOCM_RTS) {
3692 CY_LOCK(info, flags);
3693 cy_writel(&ch_ctrl[channel].rs_control,
3694 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
3695 CY_UNLOCK(info, flags);
3696 }
3697 if (set & TIOCM_DTR){
3698 CY_LOCK(info, flags);
3699 cy_writel(&ch_ctrl[channel].rs_control,
3700 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
3701 #ifdef CY_DEBUG_DTR
3702 printk("cyc:set_modem_info raising Z DTR\n");
3703 #endif
3704 CY_UNLOCK(info, flags);
3705 }
3706 if (clear & TIOCM_DTR) {
3707 CY_LOCK(info, flags);
3708 cy_writel(&ch_ctrl[channel].rs_control,
3709 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
3710 #ifdef CY_DEBUG_DTR
3711 printk("cyc:set_modem_info clearing Z DTR\n");
3712 #endif
3713 CY_UNLOCK(info, flags);
3714 }
3715 }else{
3716 return -ENODEV;
3717 }
3718 CY_LOCK(info, flags);
3719 retval = cyz_issue_cmd(&cy_card[info->card],
3720 channel, C_CM_IOCTLM,0L);
3721 if (retval != 0){
3722 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3723 info->line, retval);
3724 }
3725 CY_UNLOCK(info, flags);
3726 }
3727 return 0;
3728 } /* cy_tiocmset */
3729
3730 /*
3731 * cy_break() --- routine which turns the break handling on or off
3732 */
3733 static void
3734 cy_break(struct tty_struct *tty, int break_state)
3735 {
3736 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3737 unsigned long flags;
3738
3739 if (serial_paranoia_check(info, tty->name, "cy_break"))
3740 return;
3741
3742 CY_LOCK(info, flags);
3743 if (!IS_CYC_Z(cy_card[info->card])) {
3744 /* Let the transmit ISR take care of this (since it
3745 requires stuffing characters into the output stream).
3746 */
3747 if (break_state == -1) {
3748 if (!info->breakon) {
3749 info->breakon = 1;
3750 if (!info->xmit_cnt) {
3751 CY_UNLOCK(info, flags);
3752 start_xmit(info);
3753 CY_LOCK(info, flags);
3754 }
3755 }
3756 } else {
3757 if (!info->breakoff) {
3758 info->breakoff = 1;
3759 if (!info->xmit_cnt) {
3760 CY_UNLOCK(info, flags);
3761 start_xmit(info);
3762 CY_LOCK(info, flags);
3763 }
3764 }
3765 }
3766 } else {
3767 int retval;
3768
3769 if (break_state == -1) {
3770 retval = cyz_issue_cmd(&cy_card[info->card],
3771 (info->line) - (cy_card[info->card].first_line),
3772 C_CM_SET_BREAK, 0L);
3773 if (retval != 0) {
3774 printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
3775 info->line, retval);
3776 }
3777 } else {
3778 retval = cyz_issue_cmd(&cy_card[info->card],
3779 (info->line) - (cy_card[info->card].first_line),
3780 C_CM_CLR_BREAK, 0L);
3781 if (retval != 0) {
3782 printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
3783 info->line, retval);
3784 }
3785 }
3786 }
3787 CY_UNLOCK(info, flags);
3788 } /* cy_break */
3789
3790 static int
3791 get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon)
3792 {
3793
3794 if(copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3795 return -EFAULT;
3796 info->mon.int_count = 0;
3797 info->mon.char_count = 0;
3798 info->mon.char_max = 0;
3799 info->mon.char_last = 0;
3800 return 0;
3801 }/* get_mon_info */
3802
3803
3804 static int
3805 set_threshold(struct cyclades_port * info, unsigned long value)
3806 {
3807 void __iomem *base_addr;
3808 int card,channel,chip,index;
3809 unsigned long flags;
3810
3811 card = info->card;
3812 channel = info->line - cy_card[card].first_line;
3813 if (!IS_CYC_Z(cy_card[card])) {
3814 chip = channel>>2;
3815 channel &= 0x03;
3816 index = cy_card[card].bus_index;
3817 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3818
3819 info->cor3 &= ~CyREC_FIFO;
3820 info->cor3 |= value & CyREC_FIFO;
3821
3822 CY_LOCK(info, flags);
3823 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3824 cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
3825 CY_UNLOCK(info, flags);
3826 } else {
3827 // Nothing to do!
3828 }
3829 return 0;
3830 }/* set_threshold */
3831
3832
3833 static int
3834 get_threshold(struct cyclades_port * info, unsigned long __user *value)
3835 {
3836 void __iomem *base_addr;
3837 int card,channel,chip,index;
3838 unsigned long tmp;
3839
3840 card = info->card;
3841 channel = info->line - cy_card[card].first_line;
3842 if (!IS_CYC_Z(cy_card[card])) {
3843 chip = channel>>2;
3844 channel &= 0x03;
3845 index = cy_card[card].bus_index;
3846 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3847
3848 tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
3849 return put_user(tmp,value);
3850 } else {
3851 // Nothing to do!
3852 return 0;
3853 }
3854 }/* get_threshold */
3855
3856
3857 static int
3858 set_default_threshold(struct cyclades_port * info, unsigned long value)
3859 {
3860 info->default_threshold = value & 0x0f;
3861 return 0;
3862 }/* set_default_threshold */
3863
3864
3865 static int
3866 get_default_threshold(struct cyclades_port * info, unsigned long __user *value)
3867 {
3868 return put_user(info->default_threshold,value);
3869 }/* get_default_threshold */
3870
3871
3872 static int
3873 set_timeout(struct cyclades_port * info, unsigned long value)
3874 {
3875 void __iomem *base_addr;
3876 int card,channel,chip,index;
3877 unsigned long flags;
3878
3879 card = info->card;
3880 channel = info->line - cy_card[card].first_line;
3881 if (!IS_CYC_Z(cy_card[card])) {
3882 chip = channel>>2;
3883 channel &= 0x03;
3884 index = cy_card[card].bus_index;
3885 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3886
3887 CY_LOCK(info, flags);
3888 cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
3889 CY_UNLOCK(info, flags);
3890 } else {
3891 // Nothing to do!
3892 }
3893 return 0;
3894 }/* set_timeout */
3895
3896
3897 static int
3898 get_timeout(struct cyclades_port * info, unsigned long __user *value)
3899 {
3900 void __iomem *base_addr;
3901 int card,channel,chip,index;
3902 unsigned long tmp;
3903
3904 card = info->card;
3905 channel = info->line - cy_card[card].first_line;
3906 if (!IS_CYC_Z(cy_card[card])) {
3907 chip = channel>>2;
3908 channel &= 0x03;
3909 index = cy_card[card].bus_index;
3910 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3911
3912 tmp = cy_readb(base_addr+(CyRTPR<<index));
3913 return put_user(tmp,value);
3914 } else {
3915 // Nothing to do!
3916 return 0;
3917 }
3918 }/* get_timeout */
3919
3920
3921 static int
3922 set_default_timeout(struct cyclades_port * info, unsigned long value)
3923 {
3924 info->default_timeout = value & 0xff;
3925 return 0;
3926 }/* set_default_timeout */
3927
3928
3929 static int
3930 get_default_timeout(struct cyclades_port * info, unsigned long __user *value)
3931 {
3932 return put_user(info->default_timeout,value);
3933 }/* get_default_timeout */
3934
3935 /*
3936 * This routine allows the tty driver to implement device-
3937 * specific ioctl's. If the ioctl number passed in cmd is
3938 * not recognized by the driver, it should return ENOIOCTLCMD.
3939 */
3940 static int
3941 cy_ioctl(struct tty_struct *tty, struct file * file,
3942 unsigned int cmd, unsigned long arg)
3943 {
3944 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3945 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3946 struct serial_icounter_struct __user *p_cuser; /* user space */
3947 int ret_val = 0;
3948 unsigned long flags;
3949 void __user *argp = (void __user *)arg;
3950
3951 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3952 return -ENODEV;
3953
3954 #ifdef CY_DEBUG_OTHER
3955 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3956 info->line, cmd, arg); /* */
3957 #endif
3958
3959 switch (cmd) {
3960 case CYGETMON:
3961 ret_val = get_mon_info(info, argp);
3962 break;
3963 case CYGETTHRESH:
3964 ret_val = get_threshold(info, argp);
3965 break;
3966 case CYSETTHRESH:
3967 ret_val = set_threshold(info, arg);
3968 break;
3969 case CYGETDEFTHRESH:
3970 ret_val = get_default_threshold(info, argp);
3971 break;
3972 case CYSETDEFTHRESH:
3973 ret_val = set_default_threshold(info, arg);
3974 break;
3975 case CYGETTIMEOUT:
3976 ret_val = get_timeout(info, argp);
3977 break;
3978 case CYSETTIMEOUT:
3979 ret_val = set_timeout(info, arg);
3980 break;
3981 case CYGETDEFTIMEOUT:
3982 ret_val = get_default_timeout(info, argp);
3983 break;
3984 case CYSETDEFTIMEOUT:
3985 ret_val = set_default_timeout(info, arg);
3986 break;
3987 case CYSETRFLOW:
3988 info->rflow = (int)arg;
3989 ret_val = 0;
3990 break;
3991 case CYGETRFLOW:
3992 ret_val = info->rflow;
3993 break;
3994 case CYSETRTSDTR_INV:
3995 info->rtsdtr_inv = (int)arg;
3996 ret_val = 0;
3997 break;
3998 case CYGETRTSDTR_INV:
3999 ret_val = info->rtsdtr_inv;
4000 break;
4001 case CYGETCARDINFO:
4002 if (copy_to_user(argp, &cy_card[info->card],
4003 sizeof (struct cyclades_card))) {
4004 ret_val = -EFAULT;
4005 break;
4006 }
4007 ret_val = 0;
4008 break;
4009 case CYGETCD1400VER:
4010 ret_val = info->chip_rev;
4011 break;
4012 #ifndef CONFIG_CYZ_INTR
4013 case CYZSETPOLLCYCLE:
4014 cyz_polling_cycle = (arg * HZ) / 1000;
4015 ret_val = 0;
4016 break;
4017 case CYZGETPOLLCYCLE:
4018 ret_val = (cyz_polling_cycle * 1000) / HZ;
4019 break;
4020 #endif /* CONFIG_CYZ_INTR */
4021 case CYSETWAIT:
4022 info->closing_wait = (unsigned short)arg * HZ/100;
4023 ret_val = 0;
4024 break;
4025 case CYGETWAIT:
4026 ret_val = info->closing_wait / (HZ/100);
4027 break;
4028 case TIOCGSERIAL:
4029 ret_val = get_serial_info(info, argp);
4030 break;
4031 case TIOCSSERIAL:
4032 ret_val = set_serial_info(info, argp);
4033 break;
4034 case TIOCSERGETLSR: /* Get line status register */
4035 ret_val = get_lsr_info(info, argp);
4036 break;
4037 /*
4038 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4039 * - mask passed in arg for lines of interest
4040 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4041 * Caller should use TIOCGICOUNT to see which one it was
4042 */
4043 case TIOCMIWAIT:
4044 CY_LOCK(info, flags);
4045 /* note the counters on entry */
4046 cprev = info->icount;
4047 CY_UNLOCK(info, flags);
4048 while (1) {
4049 interruptible_sleep_on(&info->delta_msr_wait);
4050 /* see if a signal did it */
4051 if (signal_pending(current)) {
4052 return -ERESTARTSYS;
4053 }
4054
4055 CY_LOCK(info, flags);
4056 cnow = info->icount; /* atomic copy */
4057 CY_UNLOCK(info, flags);
4058
4059 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4060 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4061 return -EIO; /* no change => error */
4062 }
4063 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4064 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4065 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4066 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
4067 return 0;
4068 }
4069 cprev = cnow;
4070 }
4071 /* NOTREACHED */
4072
4073 /*
4074 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4075 * Return: write counters to the user passed counter struct
4076 * NB: both 1->0 and 0->1 transitions are counted except for
4077 * RI where only 0->1 is counted.
4078 */
4079 case TIOCGICOUNT:
4080 CY_LOCK(info, flags);
4081 cnow = info->icount;
4082 CY_UNLOCK(info, flags);
4083 p_cuser = argp;
4084 ret_val = put_user(cnow.cts, &p_cuser->cts);
4085 if (ret_val) return ret_val;
4086 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4087 if (ret_val) return ret_val;
4088 ret_val = put_user(cnow.rng, &p_cuser->rng);
4089 if (ret_val) return ret_val;
4090 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4091 if (ret_val) return ret_val;
4092 ret_val = put_user(cnow.rx, &p_cuser->rx);
4093 if (ret_val) return ret_val;
4094 ret_val = put_user(cnow.tx, &p_cuser->tx);
4095 if (ret_val) return ret_val;
4096 ret_val = put_user(cnow.frame, &p_cuser->frame);
4097 if (ret_val) return ret_val;
4098 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4099 if (ret_val) return ret_val;
4100 ret_val = put_user(cnow.parity, &p_cuser->parity);
4101 if (ret_val) return ret_val;
4102 ret_val = put_user(cnow.brk, &p_cuser->brk);
4103 if (ret_val) return ret_val;
4104 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4105 if (ret_val) return ret_val;
4106 ret_val = 0;
4107 break;
4108 default:
4109 ret_val = -ENOIOCTLCMD;
4110 }
4111
4112 #ifdef CY_DEBUG_OTHER
4113 printk(" cyc:cy_ioctl done\n");
4114 #endif
4115
4116 return ret_val;
4117 } /* cy_ioctl */
4118
4119
4120 /*
4121 * This routine allows the tty driver to be notified when
4122 * device's termios settings have changed. Note that a
4123 * well-designed tty driver should be prepared to accept the case
4124 * where old == NULL, and try to do something rational.
4125 */
4126 static void
4127 cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
4128 {
4129 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4130
4131 #ifdef CY_DEBUG_OTHER
4132 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4133 #endif
4134
4135 if ((tty->termios->c_cflag == old_termios->c_cflag) &&
4136 ((tty->termios->c_iflag & (IXON|IXANY)) ==
4137 (old_termios->c_iflag & (IXON|IXANY))))
4138 return;
4139 set_line_char(info);
4140
4141 if ((old_termios->c_cflag & CRTSCTS) &&
4142 !(tty->termios->c_cflag & CRTSCTS)) {
4143 tty->hw_stopped = 0;
4144 cy_start(tty);
4145 }
4146 #if 0
4147 /*
4148 * No need to wake up processes in open wait, since they
4149 * sample the CLOCAL flag once, and don't recheck it.
4150 * XXX It's not clear whether the current behavior is correct
4151 * or not. Hence, this may change.....
4152 */
4153 if (!(old_termios->c_cflag & CLOCAL) &&
4154 (tty->termios->c_cflag & CLOCAL))
4155 wake_up_interruptible(&info->open_wait);
4156 #endif
4157
4158 return;
4159 } /* cy_set_termios */
4160
4161 /* This function is used to send a high-priority XON/XOFF character to
4162 the device.
4163 */
4164 static void
4165 cy_send_xchar (struct tty_struct *tty, char ch)
4166 {
4167 struct cyclades_port *info = (struct cyclades_port *) tty->driver_data;
4168 int card, channel;
4169
4170 if (serial_paranoia_check (info, tty->name, "cy_send_xchar"))
4171 return;
4172
4173 info->x_char = ch;
4174
4175 if (ch)
4176 cy_start (tty);
4177
4178 card = info->card;
4179 channel = info->line - cy_card[card].first_line;
4180
4181 if (IS_CYC_Z (cy_card[card])) {
4182 if (ch == STOP_CHAR (tty))
4183 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
4184 else if (ch == START_CHAR (tty))
4185 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXON, 0L);
4186 }
4187 }
4188
4189 /* This routine is called by the upper-layer tty layer to signal
4190 that incoming characters should be throttled because the input
4191 buffers are close to full.
4192 */
4193 static void
4194 cy_throttle(struct tty_struct * tty)
4195 {
4196 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4197 unsigned long flags;
4198 void __iomem *base_addr;
4199 int card,chip,channel,index;
4200
4201 #ifdef CY_DEBUG_THROTTLE
4202 char buf[64];
4203
4204 printk("cyc:throttle %s: %d....ttyC%d\n",
4205 tty_name(tty, buf),
4206 tty->ldisc.chars_in_buffer(tty), info->line);
4207 #endif
4208
4209 if (serial_paranoia_check(info, tty->name, "cy_throttle")){
4210 return;
4211 }
4212
4213 card = info->card;
4214
4215 if (I_IXOFF(tty)) {
4216 if (!IS_CYC_Z (cy_card[card]))
4217 cy_send_xchar (tty, STOP_CHAR (tty));
4218 else
4219 info->throttle = 1;
4220 }
4221
4222 if (tty->termios->c_cflag & CRTSCTS) {
4223 channel = info->line - cy_card[card].first_line;
4224 if (!IS_CYC_Z(cy_card[card])) {
4225 chip = channel>>2;
4226 channel &= 0x03;
4227 index = cy_card[card].bus_index;
4228 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4229
4230 CY_LOCK(info, flags);
4231 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4232 if (info->rtsdtr_inv) {
4233 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
4234 } else {
4235 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
4236 }
4237 CY_UNLOCK(info, flags);
4238 } else {
4239 info->throttle = 1;
4240 }
4241 }
4242
4243 return;
4244 } /* cy_throttle */
4245
4246
4247 /*
4248 * This routine notifies the tty driver that it should signal
4249 * that characters can now be sent to the tty without fear of
4250 * overrunning the input buffers of the line disciplines.
4251 */
4252 static void
4253 cy_unthrottle(struct tty_struct * tty)
4254 {
4255 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4256 unsigned long flags;
4257 void __iomem *base_addr;
4258 int card,chip,channel,index;
4259
4260 #ifdef CY_DEBUG_THROTTLE
4261 char buf[64];
4262
4263 printk("cyc:unthrottle %s: %d....ttyC%d\n",
4264 tty_name(tty, buf),
4265 tty->ldisc.chars_in_buffer(tty), info->line);
4266 #endif
4267
4268 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")){
4269 return;
4270 }
4271
4272 if (I_IXOFF(tty)) {
4273 if (info->x_char)
4274 info->x_char = 0;
4275 else
4276 cy_send_xchar (tty, START_CHAR (tty));
4277 }
4278
4279 if (tty->termios->c_cflag & CRTSCTS) {
4280 card = info->card;
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 + (cy_chip_offset[chip]<<index);
4287
4288 CY_LOCK(info, flags);
4289 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4290 if (info->rtsdtr_inv) {
4291 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
4292 } else {
4293 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
4294 }
4295 CY_UNLOCK(info, flags);
4296 } else {
4297 info->throttle = 0;
4298 }
4299 }
4300
4301 return;
4302 } /* cy_unthrottle */
4303
4304
4305 /* cy_start and cy_stop provide software output flow control as a
4306 function of XON/XOFF, software CTS, and other such stuff.
4307 */
4308 static void
4309 cy_stop(struct tty_struct *tty)
4310 {
4311 struct cyclades_card *cinfo;
4312 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4313 void __iomem *base_addr;
4314 int chip,channel,index;
4315 unsigned long flags;
4316
4317 #ifdef CY_DEBUG_OTHER
4318 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4319 #endif
4320
4321 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4322 return;
4323
4324 cinfo = &cy_card[info->card];
4325 channel = info->line - cinfo->first_line;
4326 if (!IS_CYC_Z(*cinfo)) {
4327 index = cinfo->bus_index;
4328 chip = channel>>2;
4329 channel &= 0x03;
4330 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4331
4332 CY_LOCK(info, flags);
4333 cy_writeb(base_addr+(CyCAR<<index),
4334 (u_char)(channel & 0x0003)); /* index channel */
4335 cy_writeb(base_addr+(CySRER<<index),
4336 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
4337 CY_UNLOCK(info, flags);
4338 } else {
4339 // Nothing to do!
4340 }
4341
4342 return;
4343 } /* cy_stop */
4344
4345
4346 static void
4347 cy_start(struct tty_struct *tty)
4348 {
4349 struct cyclades_card *cinfo;
4350 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4351 void __iomem *base_addr;
4352 int chip,channel,index;
4353 unsigned long flags;
4354
4355 #ifdef CY_DEBUG_OTHER
4356 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4357 #endif
4358
4359 if (serial_paranoia_check(info, tty->name, "cy_start"))
4360 return;
4361
4362 cinfo = &cy_card[info->card];
4363 channel = info->line - cinfo->first_line;
4364 index = cinfo->bus_index;
4365 if (!IS_CYC_Z(*cinfo)) {
4366 chip = channel>>2;
4367 channel &= 0x03;
4368 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4369
4370 CY_LOCK(info, flags);
4371 cy_writeb(base_addr+(CyCAR<<index),
4372 (u_char)(channel & 0x0003)); /* index channel */
4373 cy_writeb(base_addr+(CySRER<<index),
4374 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
4375 CY_UNLOCK(info, flags);
4376 } else {
4377 // Nothing to do!
4378 }
4379
4380 return;
4381 } /* cy_start */
4382
4383
4384 static void
4385 cy_flush_buffer(struct tty_struct *tty)
4386 {
4387 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4388 int card, channel, retval;
4389 unsigned long flags;
4390
4391 #ifdef CY_DEBUG_IO
4392 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4393 #endif
4394
4395 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4396 return;
4397
4398 card = info->card;
4399 channel = (info->line) - (cy_card[card].first_line);
4400
4401 CY_LOCK(info, flags);
4402 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4403 CY_UNLOCK(info, flags);
4404
4405 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4406 buffers as well */
4407 CY_LOCK(info, flags);
4408 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4409 if (retval != 0) {
4410 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4411 info->line, retval);
4412 }
4413 CY_UNLOCK(info, flags);
4414 }
4415 tty_wakeup(tty);
4416 wake_up_interruptible(&tty->write_wait);
4417 } /* cy_flush_buffer */
4418
4419
4420 /*
4421 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4422 */
4423 static void
4424 cy_hangup(struct tty_struct *tty)
4425 {
4426 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
4427
4428 #ifdef CY_DEBUG_OTHER
4429 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4430 #endif
4431
4432 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4433 return;
4434
4435 cy_flush_buffer(tty);
4436 shutdown(info);
4437 info->event = 0;
4438 info->count = 0;
4439 #ifdef CY_DEBUG_COUNT
4440 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4441 #endif
4442 info->tty = NULL;
4443 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4444 wake_up_interruptible(&info->open_wait);
4445 } /* cy_hangup */
4446
4447
4448 /*
4449 * ---------------------------------------------------------------------
4450 * cy_init() and friends
4451 *
4452 * cy_init() is called at boot-time to initialize the serial driver.
4453 * ---------------------------------------------------------------------
4454 */
4455
4456 /* initialize chips on Cyclom-Y card -- return number of valid
4457 chips (which is number of ports/4) */
4458 static unsigned short __init
4459 cyy_init_card(void __iomem *true_base_addr,int index)
4460 {
4461 unsigned int chip_number;
4462 void __iomem *base_addr;
4463
4464 cy_writeb(true_base_addr+(Cy_HwReset<<index), 0);
4465 /* Cy_HwReset is 0x1400 */
4466 cy_writeb(true_base_addr+(Cy_ClrIntr<<index), 0);
4467 /* Cy_ClrIntr is 0x1800 */
4468 udelay(500L);
4469
4470 for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
4471 base_addr = true_base_addr + (cy_chip_offset[chip_number]<<index);
4472 mdelay(1);
4473 if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
4474 /*************
4475 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4476 chip_number, (unsigned long)base_addr);
4477 *************/
4478 return chip_number;
4479 }
4480
4481 cy_writeb(base_addr+(CyGFRCR<<index), 0);
4482 udelay(10L);
4483
4484 /* The Cyclom-16Y does not decode address bit 9 and therefore
4485 cannot distinguish between references to chip 0 and a non-
4486 existent chip 4. If the preceding clearing of the supposed
4487 chip 4 GFRCR register appears at chip 0, there is no chip 4
4488 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4489 */
4490 if (chip_number == 4
4491 && cy_readb(true_base_addr
4492 + (cy_chip_offset[0]<<index)
4493 + (CyGFRCR<<index)) == 0){
4494 return chip_number;
4495 }
4496
4497 cy_writeb(base_addr+(CyCCR<<index), CyCHIP_RESET);
4498 mdelay(1);
4499
4500 if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
4501 /*
4502 printk(" chip #%d at %#6lx is not responding ",
4503 chip_number, (unsigned long)base_addr);
4504 printk("(GFRCR stayed 0)\n",
4505 */
4506 return chip_number;
4507 }
4508 if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
4509 /*
4510 printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
4511 chip_number, (unsigned long)base_addr,
4512 base_addr[CyGFRCR<<index]);
4513 */
4514 return chip_number;
4515 }
4516 cy_writeb(base_addr+(CyGCR<<index), CyCH0_SERIAL);
4517 if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
4518 /* It is a CD1400 rev. J or later */
4519 /* Impossible to reach 5ms with this chip.
4520 Changed to 2ms instead (f = 500 Hz). */
4521 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
4522 } else {
4523 /* f = 200 Hz */
4524 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
4525 }
4526
4527 /*
4528 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4529 chip_number, (unsigned long)base_addr,
4530 cy_readb(base_addr+(CyGFRCR<<index)));
4531 */
4532 }
4533 return chip_number;
4534 } /* cyy_init_card */
4535
4536 /*
4537 * ---------------------------------------------------------------------
4538 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4539 * sets global variables and return the number of ISA boards found.
4540 * ---------------------------------------------------------------------
4541 */
4542 static int __init
4543 cy_detect_isa(void)
4544 {
4545 #ifdef CONFIG_ISA
4546 unsigned short cy_isa_irq,nboard;
4547 void __iomem *cy_isa_address;
4548 unsigned short i,j,cy_isa_nchan;
4549 #ifdef MODULE
4550 int isparam = 0;
4551 #endif
4552
4553 nboard = 0;
4554
4555 #ifdef MODULE
4556 /* Check for module parameters */
4557 for(i = 0 ; i < NR_CARDS; i++) {
4558 if (maddr[i] || i) {
4559 isparam = 1;
4560 cy_isa_addresses[i] = maddr[i];
4561 }
4562 if (!maddr[i])
4563 break;
4564 }
4565 #endif
4566
4567 /* scan the address table probing for Cyclom-Y/ISA boards */
4568 for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
4569 unsigned int isa_address = cy_isa_addresses[i];
4570 if (isa_address == 0x0000) {
4571 return(nboard);
4572 }
4573
4574 /* probe for CD1400... */
4575 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4576 cy_isa_nchan = CyPORTS_PER_CHIP *
4577 cyy_init_card(cy_isa_address,0);
4578 if (cy_isa_nchan == 0) {
4579 continue;
4580 }
4581
4582 #ifdef MODULE
4583 if (isparam && irq[i])
4584 cy_isa_irq = irq[i];
4585 else
4586 #endif
4587 /* find out the board's irq by probing */
4588 cy_isa_irq = detect_isa_irq(cy_isa_address);
4589 if (cy_isa_irq == 0) {
4590 printk("Cyclom-Y/ISA found at 0x%lx ",
4591 (unsigned long) cy_isa_address);
4592 printk("but the IRQ could not be detected.\n");
4593 continue;
4594 }
4595
4596 if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
4597 printk("Cyclom-Y/ISA found at 0x%lx ",
4598 (unsigned long) cy_isa_address);
4599 printk("but no more channels are available.\n");
4600 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4601 return(nboard);
4602 }
4603 /* fill the next cy_card structure available */
4604 for (j = 0 ; j < NR_CARDS ; j++) {
4605 if (cy_card[j].base_addr == 0) break;
4606 }
4607 if (j == NR_CARDS) { /* no more cy_cards available */
4608 printk("Cyclom-Y/ISA found at 0x%lx ",
4609 (unsigned long) cy_isa_address);
4610 printk("but no more cards can be used .\n");
4611 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4612 return(nboard);
4613 }
4614
4615 /* allocate IRQ */
4616 if(request_irq(cy_isa_irq, cyy_interrupt,
4617 SA_INTERRUPT, "Cyclom-Y", &cy_card[j]))
4618 {
4619 printk("Cyclom-Y/ISA found at 0x%lx ",
4620 (unsigned long) cy_isa_address);
4621 printk("but could not allocate IRQ#%d.\n",
4622 cy_isa_irq);
4623 return(nboard);
4624 }
4625
4626 /* set cy_card */
4627 cy_card[j].base_addr = cy_isa_address;
4628 cy_card[j].ctl_addr = NULL;
4629 cy_card[j].irq = (int) cy_isa_irq;
4630 cy_card[j].bus_index = 0;
4631 cy_card[j].first_line = cy_next_channel;
4632 cy_card[j].num_chips = cy_isa_nchan/4;
4633 nboard++;
4634
4635 /* print message */
4636 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4637 j+1, (unsigned long) cy_isa_address,
4638 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4639 cy_isa_irq);
4640 printk("%d channels starting from port %d.\n",
4641 cy_isa_nchan, cy_next_channel);
4642 cy_next_channel += cy_isa_nchan;
4643 }
4644 return(nboard);
4645 #else
4646 return(0);
4647 #endif /* CONFIG_ISA */
4648 } /* cy_detect_isa */
4649
4650 static void
4651 plx_init(void __iomem *addr, uclong initctl)
4652 {
4653 /* Reset PLX */
4654 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4655 udelay(100L);
4656 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4657
4658 /* Reload Config. Registers from EEPROM */
4659 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4660 udelay(100L);
4661 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4662 }
4663
4664 /*
4665 * ---------------------------------------------------------------------
4666 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4667 * sets global variables and return the number of PCI boards found.
4668 * ---------------------------------------------------------------------
4669 */
4670 static int __init
4671 cy_detect_pci(void)
4672 {
4673 #ifdef CONFIG_PCI
4674
4675 struct pci_dev *pdev = NULL;
4676 unsigned char cyy_rev_id;
4677 unsigned char cy_pci_irq = 0;
4678 uclong cy_pci_phys0, cy_pci_phys2;
4679 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4680 unsigned short i,j,cy_pci_nchan, plx_ver;
4681 unsigned short device_id,dev_index = 0;
4682 uclong mailbox;
4683 uclong ZeIndex = 0;
4684 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4685 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4686 unsigned char Ze_irq[NR_CARDS];
4687 struct pci_dev *Ze_pdev[NR_CARDS];
4688
4689 for (i = 0; i < NR_CARDS; i++) {
4690 /* look for a Cyclades card by vendor and device id */
4691 while((device_id = cy_pci_dev_id[dev_index]) != 0) {
4692 if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4693 device_id, pdev)) == NULL) {
4694 dev_index++; /* try next device id */
4695 } else {
4696 break; /* found a board */
4697 }
4698 }
4699
4700 if (device_id == 0)
4701 break;
4702
4703 if (pci_enable_device(pdev))
4704 continue;
4705
4706 /* read PCI configuration area */
4707 cy_pci_irq = pdev->irq;
4708 cy_pci_phys0 = pci_resource_start(pdev, 0);
4709 cy_pci_phys2 = pci_resource_start(pdev, 2);
4710 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4711
4712 device_id &= ~PCI_DEVICE_ID_MASK;
4713
4714 if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
4715 || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
4716 #ifdef CY_PCI_DEBUG
4717 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4718 pdev->bus->number, pdev->devfn);
4719 printk("rev_id=%d) IRQ%d\n",
4720 cyy_rev_id, (int)cy_pci_irq);
4721 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4722 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4723 #endif
4724
4725 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4726 printk(" Warning: PCI I/O bit incorrectly set. "
4727 "Ignoring it...\n");
4728 pdev->resource[2].flags &= ~IORESOURCE_IO;
4729 }
4730
4731 /* Although we don't use this I/O region, we should
4732 request it from the kernel anyway, to avoid problems
4733 with other drivers accessing it. */
4734 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4735 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4736 continue;
4737 }
4738
4739 #if defined(__alpha__)
4740 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4741 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4742 pdev->bus->number, pdev->devfn);
4743 printk("rev_id=%d) IRQ%d\n",
4744 cyy_rev_id, (int)cy_pci_irq);
4745 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4746 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4747 printk("Cyclom-Y/PCI not supported for low addresses in "
4748 "Alpha systems.\n");
4749 i--;
4750 continue;
4751 }
4752 #endif
4753 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4754 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4755
4756 #ifdef CY_PCI_DEBUG
4757 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4758 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4759 #endif
4760 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4761 cyy_init_card(cy_pci_addr2, 1));
4762 if(cy_pci_nchan == 0) {
4763 printk("Cyclom-Y PCI host card with ");
4764 printk("no Serial-Modules at 0x%lx.\n",
4765 (ulong) cy_pci_phys2);
4766 i--;
4767 continue;
4768 }
4769 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4770 printk("Cyclom-Y/PCI found at 0x%lx ",
4771 (ulong) cy_pci_phys2);
4772 printk("but no channels are available.\n");
4773 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4774 return(i);
4775 }
4776 /* fill the next cy_card structure available */
4777 for (j = 0 ; j < NR_CARDS ; j++) {
4778 if (cy_card[j].base_addr == 0) break;
4779 }
4780 if (j == NR_CARDS) { /* no more cy_cards available */
4781 printk("Cyclom-Y/PCI found at 0x%lx ",
4782 (ulong) cy_pci_phys2);
4783 printk("but no more cards can be used.\n");
4784 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4785 return(i);
4786 }
4787
4788 /* allocate IRQ */
4789 if(request_irq(cy_pci_irq, cyy_interrupt,
4790 SA_SHIRQ, "Cyclom-Y", &cy_card[j]))
4791 {
4792 printk("Cyclom-Y/PCI found at 0x%lx ",
4793 (ulong) cy_pci_phys2);
4794 printk("but could not allocate IRQ%d.\n",
4795 cy_pci_irq);
4796 return(i);
4797 }
4798
4799 /* set cy_card */
4800 cy_card[j].base_phys = (ulong)cy_pci_phys2;
4801 cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
4802 cy_card[j].base_addr = cy_pci_addr2;
4803 cy_card[j].ctl_addr = cy_pci_addr0;
4804 cy_card[j].irq = (int) cy_pci_irq;
4805 cy_card[j].bus_index = 1;
4806 cy_card[j].first_line = cy_next_channel;
4807 cy_card[j].num_chips = cy_pci_nchan/4;
4808 cy_card[j].pdev = pdev;
4809
4810 /* enable interrupts in the PCI interface */
4811 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4812 switch (plx_ver) {
4813 case PLX_9050:
4814
4815 cy_writeb(cy_pci_addr0+0x4c, 0x43);
4816 break;
4817
4818 case PLX_9060:
4819 case PLX_9080:
4820 default: /* Old boards, use PLX_9060 */
4821
4822 plx_init(cy_pci_addr0, 0x6c);
4823 /* For some yet unknown reason, once the PLX9060 reloads
4824 the EEPROM, the IRQ is lost and, thus, we have to
4825 re-write it to the PCI config. registers.
4826 This will remain here until we find a permanent fix. */
4827 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4828
4829 cy_writew(cy_pci_addr0+0x68,
4830 cy_readw(cy_pci_addr0+0x68)|0x0900);
4831 break;
4832 }
4833
4834 /* print message */
4835 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4836 j+1,
4837 (ulong)cy_pci_phys2,
4838 (ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
4839 (int)cy_pci_irq);
4840 printk("%d channels starting from port %d.\n",
4841 cy_pci_nchan, cy_next_channel);
4842
4843 cy_next_channel += cy_pci_nchan;
4844 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
4845 /* print message */
4846 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4847 pdev->bus->number, pdev->devfn);
4848 printk("rev_id=%d) IRQ%d\n",
4849 cyy_rev_id, (int)cy_pci_irq);
4850 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4851 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4852 printk("Cyclades-Z/PCI not supported for low addresses\n");
4853 break;
4854 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
4855 #ifdef CY_PCI_DEBUG
4856 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4857 pdev->bus->number, pdev->devfn);
4858 printk("rev_id=%d) IRQ%d\n",
4859 cyy_rev_id, (int)cy_pci_irq);
4860 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4861 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4862 #endif
4863 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4864
4865 /* Disable interrupts on the PLX before resetting it */
4866 cy_writew(cy_pci_addr0+0x68,
4867 cy_readw(cy_pci_addr0+0x68) & ~0x0900);
4868
4869 plx_init(cy_pci_addr0, 0x6c);
4870 /* For some yet unknown reason, once the PLX9060 reloads
4871 the EEPROM, the IRQ is lost and, thus, we have to
4872 re-write it to the PCI config. registers.
4873 This will remain here until we find a permanent fix. */
4874 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4875
4876 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4877 cy_pci_addr0)->mail_box_0);
4878
4879 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4880 printk(" Warning: PCI I/O bit incorrectly set. "
4881 "Ignoring it...\n");
4882 pdev->resource[2].flags &= ~IORESOURCE_IO;
4883 }
4884
4885 /* Although we don't use this I/O region, we should
4886 request it from the kernel anyway, to avoid problems
4887 with other drivers accessing it. */
4888 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4889 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4890 continue;
4891 }
4892
4893 if (mailbox == ZE_V1) {
4894 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
4895 if (ZeIndex == NR_CARDS) {
4896 printk("Cyclades-Ze/PCI found at 0x%lx ",
4897 (ulong)cy_pci_phys2);
4898 printk("but no more cards can be used.\n");
4899 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4900 } else {
4901 Ze_phys0[ZeIndex] = cy_pci_phys0;
4902 Ze_phys2[ZeIndex] = cy_pci_phys2;
4903 Ze_addr0[ZeIndex] = cy_pci_addr0;
4904 Ze_addr2[ZeIndex] = cy_pci_addr2;
4905 Ze_irq[ZeIndex] = cy_pci_irq;
4906 Ze_pdev[ZeIndex] = pdev;
4907 ZeIndex++;
4908 }
4909 i--;
4910 continue;
4911 } else {
4912 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
4913 }
4914
4915 #ifdef CY_PCI_DEBUG
4916 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4917 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4918 if (mailbox == ZO_V1) {
4919 cy_writel(&((struct RUNTIME_9060 *)
4920 (cy_pci_addr0))->loc_addr_base, WIN_CREG);
4921 PAUSE
4922 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
4923 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4924 (cy_pci_addr2))->fpga_id)),
4925 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4926 (cy_pci_addr2))->fpga_version)));
4927 cy_writel(&((struct RUNTIME_9060 *)
4928 (cy_pci_addr0))->loc_addr_base, WIN_RAM);
4929 } else {
4930 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
4931 }
4932 #endif
4933 /* The following clears the firmware id word. This ensures
4934 that the driver will not attempt to talk to the board
4935 until it has been properly initialized.
4936 */
4937 PAUSE
4938 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4939 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
4940
4941 /* This must be a Cyclades-8Zo/PCI. The extendable
4942 version will have a different device_id and will
4943 be allocated its maximum number of ports. */
4944 cy_pci_nchan = 8;
4945
4946 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4947 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4948 (ulong)cy_pci_phys2);
4949 printk("but no channels are available.\n");
4950 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4951 return(i);
4952 }
4953
4954 /* fill the next cy_card structure available */
4955 for (j = 0 ; j < NR_CARDS ; j++) {
4956 if (cy_card[j].base_addr == 0) break;
4957 }
4958 if (j == NR_CARDS) { /* no more cy_cards available */
4959 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4960 (ulong)cy_pci_phys2);
4961 printk("but no more cards can be used.\n");
4962 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4963 return(i);
4964 }
4965
4966 #ifdef CONFIG_CYZ_INTR
4967 /* allocate IRQ only if board has an IRQ */
4968 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
4969 if(request_irq(cy_pci_irq, cyz_interrupt,
4970 SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
4971 {
4972 printk("Cyclom-8Zo/PCI found at 0x%lx ",
4973 (ulong) cy_pci_phys2);
4974 printk("but could not allocate IRQ%d.\n",
4975 cy_pci_irq);
4976 return(i);
4977 }
4978 }
4979 #endif /* CONFIG_CYZ_INTR */
4980
4981
4982 /* set cy_card */
4983 cy_card[j].base_phys = cy_pci_phys2;
4984 cy_card[j].ctl_phys = cy_pci_phys0;
4985 cy_card[j].base_addr = cy_pci_addr2;
4986 cy_card[j].ctl_addr = cy_pci_addr0;
4987 cy_card[j].irq = (int) cy_pci_irq;
4988 cy_card[j].bus_index = 1;
4989 cy_card[j].first_line = cy_next_channel;
4990 cy_card[j].num_chips = -1;
4991 cy_card[j].pdev = pdev;
4992
4993 /* print message */
4994 #ifdef CONFIG_CYZ_INTR
4995 /* don't report IRQ if board is no IRQ */
4996 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
4997 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4998 j+1,(ulong)cy_pci_phys2,
4999 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
5000 (int)cy_pci_irq);
5001 else
5002 #endif /* CONFIG_CYZ_INTR */
5003 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5004 j+1,(ulong)cy_pci_phys2,
5005 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5006
5007 printk("%d channels starting from port %d.\n",
5008 cy_pci_nchan,cy_next_channel);
5009 cy_next_channel += cy_pci_nchan;
5010 }
5011 }
5012
5013 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5014 cy_pci_phys0 = Ze_phys0[0];
5015 cy_pci_phys2 = Ze_phys2[0];
5016 cy_pci_addr0 = Ze_addr0[0];
5017 cy_pci_addr2 = Ze_addr2[0];
5018 cy_pci_irq = Ze_irq[0];
5019 pdev = Ze_pdev[0];
5020 for (j = 0 ; j < ZeIndex-1 ; j++) {
5021 Ze_phys0[j] = Ze_phys0[j+1];
5022 Ze_phys2[j] = Ze_phys2[j+1];
5023 Ze_addr0[j] = Ze_addr0[j+1];
5024 Ze_addr2[j] = Ze_addr2[j+1];
5025 Ze_irq[j] = Ze_irq[j+1];
5026 Ze_pdev[j] = Ze_pdev[j+1];
5027 }
5028 ZeIndex--;
5029 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5030 cy_pci_addr0)->mail_box_0);
5031 #ifdef CY_PCI_DEBUG
5032 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5033 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5034 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
5035 #endif
5036 PAUSE
5037 /* This must be the new Cyclades-Ze/PCI. */
5038 cy_pci_nchan = ZE_V1_NPORTS;
5039
5040 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
5041 printk("Cyclades-Ze/PCI found at 0x%lx ",
5042 (ulong)cy_pci_phys2);
5043 printk("but no channels are available.\n");
5044 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
5045 return(i);
5046 }
5047
5048 /* fill the next cy_card structure available */
5049 for (j = 0 ; j < NR_CARDS ; j++) {
5050 if (cy_card[j].base_addr == 0) break;
5051 }
5052 if (j == NR_CARDS) { /* no more cy_cards available */
5053 printk("Cyclades-Ze/PCI found at 0x%lx ",
5054 (ulong)cy_pci_phys2);
5055 printk("but no more cards can be used.\n");
5056 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5057 return(i);
5058 }
5059
5060 #ifdef CONFIG_CYZ_INTR
5061 /* allocate IRQ only if board has an IRQ */
5062 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
5063 if(request_irq(cy_pci_irq, cyz_interrupt,
5064 SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
5065 {
5066 printk("Cyclom-Ze/PCI found at 0x%lx ",
5067 (ulong) cy_pci_phys2);
5068 printk("but could not allocate IRQ%d.\n",
5069 cy_pci_irq);
5070 return(i);
5071 }
5072 }
5073 #endif /* CONFIG_CYZ_INTR */
5074
5075 /* set cy_card */
5076 cy_card[j].base_phys = cy_pci_phys2;
5077 cy_card[j].ctl_phys = cy_pci_phys0;
5078 cy_card[j].base_addr = cy_pci_addr2;
5079 cy_card[j].ctl_addr = cy_pci_addr0;
5080 cy_card[j].irq = (int) cy_pci_irq;
5081 cy_card[j].bus_index = 1;
5082 cy_card[j].first_line = cy_next_channel;
5083 cy_card[j].num_chips = -1;
5084 cy_card[j].pdev = pdev;
5085
5086 /* print message */
5087 #ifdef CONFIG_CYZ_INTR
5088 /* don't report IRQ if board is no IRQ */
5089 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
5090 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5091 j+1,(ulong)cy_pci_phys2,
5092 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
5093 (int)cy_pci_irq);
5094 else
5095 #endif /* CONFIG_CYZ_INTR */
5096 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5097 j+1,(ulong)cy_pci_phys2,
5098 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
5099
5100 printk("%d channels starting from port %d.\n",
5101 cy_pci_nchan,cy_next_channel);
5102 cy_next_channel += cy_pci_nchan;
5103 }
5104 if (ZeIndex != 0) {
5105 printk("Cyclades-Ze/PCI found at 0x%x ",
5106 (unsigned int) Ze_phys2[0]);
5107 printk("but no more cards can be used.\n");
5108 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5109 }
5110 return(i);
5111 #else
5112 return(0);
5113 #endif /* ifdef CONFIG_PCI */
5114 } /* cy_detect_pci */
5115
5116
5117 /*
5118 * This routine prints out the appropriate serial driver version number
5119 * and identifies which options were configured into this driver.
5120 */
5121 static inline void
5122 show_version(void)
5123 {
5124 char *rcsvers, *rcsdate, *tmp;
5125 rcsvers = strchr(rcsid, ' '); rcsvers++;
5126 tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
5127 rcsdate = strchr(tmp, ' '); rcsdate++;
5128 tmp = strrchr(rcsdate, ' '); *tmp = '\0';
5129 printk("Cyclades driver %s %s\n",
5130 rcsvers, rcsdate);
5131 printk(" built %s %s\n",
5132 __DATE__, __TIME__);
5133 } /* show_version */
5134
5135 static int
5136 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5137 int *eof, void *data)
5138 {
5139 struct cyclades_port *info;
5140 int i;
5141 int len=0;
5142 off_t begin=0;
5143 off_t pos=0;
5144 int size;
5145 __u32 cur_jifs = jiffies;
5146
5147 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn IdleIn Overruns Ldisc\n");
5148
5149 pos += size;
5150 len += size;
5151
5152 /* Output one line for each known port */
5153 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5154 info = &cy_port[i];
5155
5156 if (info->count)
5157 size = sprintf(buf+len,
5158 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5159 info->line,
5160 JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
5161 info->idle_stats.xmit_bytes,
5162 JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
5163 info->idle_stats.recv_bytes,
5164 JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
5165 info->idle_stats.overruns,
5166 (long) info->tty->ldisc.num);
5167 else
5168 size = sprintf(buf+len,
5169 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5170 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5171 len += size;
5172 pos = begin + len;
5173
5174 if (pos < offset) {
5175 len = 0;
5176 begin = pos;
5177 }
5178 if (pos > offset + length)
5179 goto done;
5180 }
5181 *eof = 1;
5182 done:
5183 *start = buf + (offset - begin); /* Start of wanted data */
5184 len -= (offset - begin); /* Start slop */
5185 if (len > length)
5186 len = length; /* Ending slop */
5187 if (len < 0)
5188 len = 0;
5189 return len;
5190 }
5191
5192 /* The serial driver boot-time initialization code!
5193 Hardware I/O ports are mapped to character special devices on a
5194 first found, first allocated manner. That is, this code searches
5195 for Cyclom cards in the system. As each is found, it is probed
5196 to discover how many chips (and thus how many ports) are present.
5197 These ports are mapped to the tty ports 32 and upward in monotonic
5198 fashion. If an 8-port card is replaced with a 16-port card, the
5199 port mapping on a following card will shift.
5200
5201 This approach is different from what is used in the other serial
5202 device driver because the Cyclom is more properly a multiplexer,
5203 not just an aggregation of serial ports on one card.
5204
5205 If there are more cards with more ports than have been
5206 statically allocated above, a warning is printed and the
5207 extra ports are ignored.
5208 */
5209
5210 static struct tty_operations cy_ops = {
5211 .open = cy_open,
5212 .close = cy_close,
5213 .write = cy_write,
5214 .put_char = cy_put_char,
5215 .flush_chars = cy_flush_chars,
5216 .write_room = cy_write_room,
5217 .chars_in_buffer = cy_chars_in_buffer,
5218 .flush_buffer = cy_flush_buffer,
5219 .ioctl = cy_ioctl,
5220 .throttle = cy_throttle,
5221 .unthrottle = cy_unthrottle,
5222 .set_termios = cy_set_termios,
5223 .stop = cy_stop,
5224 .start = cy_start,
5225 .hangup = cy_hangup,
5226 .break_ctl = cy_break,
5227 .wait_until_sent = cy_wait_until_sent,
5228 .read_proc = cyclades_get_proc_info,
5229 .tiocmget = cy_tiocmget,
5230 .tiocmset = cy_tiocmset,
5231 };
5232
5233 static int __init
5234 cy_init(void)
5235 {
5236 struct cyclades_port *info;
5237 struct cyclades_card *cinfo;
5238 int number_z_boards = 0;
5239 int board,port,i,index;
5240 unsigned long mailbox;
5241 unsigned short chip_number;
5242 int nports;
5243
5244 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5245 if (!cy_serial_driver)
5246 return -ENOMEM;
5247 show_version();
5248
5249 /* Initialize the tty_driver structure */
5250
5251 cy_serial_driver->owner = THIS_MODULE;
5252 cy_serial_driver->driver_name = "cyclades";
5253 cy_serial_driver->name = "ttyC";
5254 cy_serial_driver->devfs_name = "tts/C";
5255 cy_serial_driver->major = CYCLADES_MAJOR;
5256 cy_serial_driver->minor_start = 0;
5257 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5258 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5259 cy_serial_driver->init_termios = tty_std_termios;
5260 cy_serial_driver->init_termios.c_cflag =
5261 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5262 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5263 tty_set_operations(cy_serial_driver, &cy_ops);
5264
5265 if (tty_register_driver(cy_serial_driver))
5266 panic("Couldn't register Cyclades serial driver\n");
5267
5268 for (i = 0; i < NR_CARDS; i++) {
5269 /* base_addr=0 indicates board not found */
5270 cy_card[i].base_addr = NULL;
5271 }
5272
5273 /* the code below is responsible to find the boards. Each different
5274 type of board has its own detection routine. If a board is found,
5275 the next cy_card structure available is set by the detection
5276 routine. These functions are responsible for checking the
5277 availability of cy_card and cy_port data structures and updating
5278 the cy_next_channel. */
5279
5280 /* look for isa boards */
5281 cy_isa_nboard = cy_detect_isa();
5282
5283 /* look for pci boards */
5284 cy_pci_nboard = cy_detect_pci();
5285
5286 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5287
5288 /* invalidate remaining cy_card structures */
5289 for (i = 0 ; i < NR_CARDS ; i++) {
5290 if (cy_card[i].base_addr == 0) {
5291 cy_card[i].first_line = -1;
5292 cy_card[i].ctl_addr = NULL;
5293 cy_card[i].irq = 0;
5294 cy_card[i].bus_index = 0;
5295 cy_card[i].first_line = 0;
5296 cy_card[i].num_chips = 0;
5297 }
5298 }
5299 /* invalidate remaining cy_port structures */
5300 for (i = cy_next_channel ; i < NR_PORTS ; i++) {
5301 cy_port[i].line = -1;
5302 cy_port[i].magic = -1;
5303 }
5304
5305 /* initialize per-port data structures for each valid board found */
5306 for (board = 0 ; board < cy_nboard ; board++) {
5307 cinfo = &cy_card[board];
5308 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5309 number_z_boards++;
5310 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5311 cy_card[board].ctl_addr)->mail_box_0);
5312 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5313 cinfo->intr_enabled = 0;
5314 cinfo->nports = 0; /* Will be correctly set later, after
5315 Z FW is loaded */
5316 spin_lock_init(&cinfo->card_lock);
5317 for (port = cinfo->first_line ;
5318 port < cinfo->first_line + nports;
5319 port++)
5320 {
5321 info = &cy_port[port];
5322 info->magic = CYCLADES_MAGIC;
5323 info->type = PORT_STARTECH;
5324 info->card = board;
5325 info->line = port;
5326 info->chip_rev = 0;
5327 info->flags = STD_COM_FLAGS;
5328 info->tty = NULL;
5329 if (mailbox == ZO_V1)
5330 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5331 else
5332 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
5333 info->cor1 = 0;
5334 info->cor2 = 0;
5335 info->cor3 = 0;
5336 info->cor4 = 0;
5337 info->cor5 = 0;
5338 info->tbpr = 0;
5339 info->tco = 0;
5340 info->rbpr = 0;
5341 info->rco = 0;
5342 info->custom_divisor = 0;
5343 info->close_delay = 5*HZ/10;
5344 info->closing_wait = CLOSING_WAIT_DELAY;
5345 info->icount.cts = info->icount.dsr =
5346 info->icount.rng = info->icount.dcd = 0;
5347 info->icount.rx = info->icount.tx = 0;
5348 info->icount.frame = info->icount.parity = 0;
5349 info->icount.overrun = info->icount.brk = 0;
5350 info->x_char = 0;
5351 info->event = 0;
5352 info->count = 0;
5353 info->blocked_open = 0;
5354 info->default_threshold = 0;
5355 info->default_timeout = 0;
5356 INIT_WORK(&info->tqueue, do_softint, info);
5357 init_waitqueue_head(&info->open_wait);
5358 init_waitqueue_head(&info->close_wait);
5359 init_waitqueue_head(&info->shutdown_wait);
5360 init_waitqueue_head(&info->delta_msr_wait);
5361 /* info->session */
5362 /* info->pgrp */
5363 info->read_status_mask = 0;
5364 /* info->timeout */
5365 /* Bentson's vars */
5366 info->jiffies[0] = 0;
5367 info->jiffies[1] = 0;
5368 info->jiffies[2] = 0;
5369 info->rflush_count = 0;
5370 #ifdef CONFIG_CYZ_INTR
5371 init_timer(&cyz_rx_full_timer[port]);
5372 cyz_rx_full_timer[port].function = NULL;
5373 #endif
5374 }
5375 continue;
5376 }else{ /* Cyclom-Y of some kind*/
5377 index = cinfo->bus_index;
5378 spin_lock_init(&cinfo->card_lock);
5379 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5380 for (port = cinfo->first_line ;
5381 port < cinfo->first_line + cinfo->nports ;
5382 port++)
5383 {
5384 info = &cy_port[port];
5385 info->magic = CYCLADES_MAGIC;
5386 info->type = PORT_CIRRUS;
5387 info->card = board;
5388 info->line = port;
5389 info->flags = STD_COM_FLAGS;
5390 info->tty = NULL;
5391 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5392 info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
5393 info->cor2 = CyETC;
5394 info->cor3 = 0x08; /* _very_ small rcv threshold */
5395 info->cor4 = 0;
5396 info->cor5 = 0;
5397 info->custom_divisor = 0;
5398 info->close_delay = 5*HZ/10;
5399 info->closing_wait = CLOSING_WAIT_DELAY;
5400 info->icount.cts = info->icount.dsr =
5401 info->icount.rng = info->icount.dcd = 0;
5402 info->icount.rx = info->icount.tx = 0;
5403 info->icount.frame = info->icount.parity = 0;
5404 info->icount.overrun = info->icount.brk = 0;
5405 chip_number = (port - cinfo->first_line) / 4;
5406 if ((info->chip_rev =
5407 cy_readb(cinfo->base_addr +
5408 (cy_chip_offset[chip_number]<<index) +
5409 (CyGFRCR<<index))) >= CD1400_REV_J) {
5410 /* It is a CD1400 rev. J or later */
5411 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5412 info->tco = baud_co_60[13]; /* Tx CO */
5413 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5414 info->rco = baud_co_60[13]; /* Rx CO */
5415 info->rflow = 0;
5416 info->rtsdtr_inv = 1;
5417 } else {
5418 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5419 info->tco = baud_co_25[13]; /* Tx CO */
5420 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5421 info->rco = baud_co_25[13]; /* Rx CO */
5422 info->rflow = 0;
5423 info->rtsdtr_inv = 0;
5424 }
5425 info->x_char = 0;
5426 info->event = 0;
5427 info->count = 0;
5428 info->blocked_open = 0;
5429 info->default_threshold = 0;
5430 info->default_timeout = 0;
5431 INIT_WORK(&info->tqueue, do_softint, info);
5432 init_waitqueue_head(&info->open_wait);
5433 init_waitqueue_head(&info->close_wait);
5434 init_waitqueue_head(&info->shutdown_wait);
5435 init_waitqueue_head(&info->delta_msr_wait);
5436 /* info->session */
5437 /* info->pgrp */
5438 info->read_status_mask =
5439 CyTIMEOUT| CySPECHAR| CyBREAK
5440 | CyPARITY| CyFRAME| CyOVERRUN;
5441 /* info->timeout */
5442 }
5443 }
5444 }
5445
5446 #ifndef CONFIG_CYZ_INTR
5447 if (number_z_boards && !cyz_timeron){
5448 cyz_timeron++;
5449 cyz_timerlist.expires = jiffies + 1;
5450 add_timer(&cyz_timerlist);
5451 #ifdef CY_PCI_DEBUG
5452 printk("Cyclades-Z polling initialized\n");
5453 #endif
5454 }
5455 #endif /* CONFIG_CYZ_INTR */
5456
5457 return 0;
5458
5459 } /* cy_init */
5460
5461 static void __exit
5462 cy_cleanup_module(void)
5463 {
5464 int i, e1;
5465
5466 #ifndef CONFIG_CYZ_INTR
5467 if (cyz_timeron){
5468 cyz_timeron = 0;
5469 del_timer(&cyz_timerlist);
5470 }
5471 #endif /* CONFIG_CYZ_INTR */
5472
5473 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5474 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5475 e1);
5476
5477 put_tty_driver(cy_serial_driver);
5478
5479 for (i = 0; i < NR_CARDS; i++) {
5480 if (cy_card[i].base_addr) {
5481 iounmap(cy_card[i].base_addr);
5482 if (cy_card[i].ctl_addr)
5483 iounmap(cy_card[i].ctl_addr);
5484 if (cy_card[i].irq
5485 #ifndef CONFIG_CYZ_INTR
5486 && cy_card[i].num_chips != -1 /* not a Z card */
5487 #endif /* CONFIG_CYZ_INTR */
5488 )
5489 free_irq(cy_card[i].irq, &cy_card[i]);
5490 #ifdef CONFIG_PCI
5491 if (cy_card[i].pdev)
5492 pci_release_regions(cy_card[i].pdev);
5493 #endif
5494 }
5495 }
5496 if (tmp_buf) {
5497 free_page((unsigned long) tmp_buf);
5498 tmp_buf = NULL;
5499 }
5500 } /* cy_cleanup_module */
5501
5502 module_init(cy_init);
5503 module_exit(cy_cleanup_module);
5504
5505 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards