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Linux-2.6.12-rc2
[mirror_ubuntu-artful-kernel.git] / drivers / char / cyclades.c
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 explictly
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/serial.h>
645 #include <linux/major.h>
646 #include <linux/string.h>
647 #include <linux/fcntl.h>
648 #include <linux/ptrace.h>
649 #include <linux/cyclades.h>
650 #include <linux/mm.h>
651 #include <linux/ioport.h>
652 #include <linux/init.h>
653 #include <linux/delay.h>
654 #include <linux/spinlock.h>
655 #include <linux/bitops.h>
656
657 #include <asm/system.h>
658 #include <asm/io.h>
659 #include <asm/irq.h>
660 #include <asm/uaccess.h>
661
662 #define CY_LOCK(info,flags) \
663 do { \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
665 } while (0)
666
667 #define CY_UNLOCK(info,flags) \
668 do { \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
670 } while (0)
671
672 #include <linux/types.h>
673 #include <linux/kernel.h>
674 #include <linux/pci.h>
675
676 #include <linux/stat.h>
677 #include <linux/proc_fs.h>
678
679 static void cy_throttle (struct tty_struct *tty);
680 static void cy_send_xchar (struct tty_struct *tty, char ch);
681
682 #define IS_CYC_Z(card) ((card).num_chips == -1)
683
684 #define Z_FPGA_CHECK(card) \
685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
687
688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
693
694 #ifndef SERIAL_XMIT_SIZE
695 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
696 #endif
697 #define WAKEUP_CHARS 256
698
699 #define STD_COM_FLAGS (0)
700
701 #define JIFFIES_DIFF(n, j) ((j) - (n))
702
703 static struct tty_driver *cy_serial_driver;
704
705 #ifdef CONFIG_ISA
706 /* This is the address lookup table. The driver will probe for
707 Cyclom-Y/ISA boards at all addresses in here. If you want the
708 driver to probe addresses at a different address, add it to
709 this table. If the driver is probing some other board and
710 causing problems, remove the offending address from this table.
711 The cy_setup function extracts additional addresses from the
712 boot options line. The form is "cyclades=address,address..."
713 */
714
715 static unsigned int cy_isa_addresses[] = {
716 0xD0000,
717 0xD2000,
718 0xD4000,
719 0xD6000,
720 0xD8000,
721 0xDA000,
722 0xDC000,
723 0xDE000,
724 0,0,0,0,0,0,0,0
725 };
726 #define NR_ISA_ADDRS (sizeof(cy_isa_addresses)/sizeof(unsigned char*))
727
728 #ifdef MODULE
729 static long maddr[NR_CARDS] = { 0, };
730 static int irq[NR_CARDS] = { 0, };
731
732 module_param_array(maddr, long, NULL, 0);
733 module_param_array(irq, int, NULL, 0);
734 #endif
735
736 #endif /* CONFIG_ISA */
737
738 /* This is the per-card data structure containing address, irq, number of
739 channels, etc. This driver supports a maximum of NR_CARDS cards.
740 */
741 static struct cyclades_card cy_card[NR_CARDS];
742
743 /* This is the per-channel data structure containing pointers, flags
744 and variables for the port. This driver supports a maximum of NR_PORTS.
745 */
746 static struct cyclades_port cy_port[NR_PORTS];
747
748 static int cy_next_channel; /* next minor available */
749
750 /*
751 * tmp_buf is used as a temporary buffer by serial_write. We need to
752 * lock it in case the copy_from_user blocks while swapping in a page,
753 * and some other program tries to do a serial write at the same time.
754 * Since the lock will only come under contention when the system is
755 * swapping and available memory is low, it makes sense to share one
756 * buffer across all the serial ports, since it significantly saves
757 * memory if large numbers of serial ports are open. This buffer is
758 * allocated when the first cy_open occurs.
759 */
760 static unsigned char *tmp_buf;
761
762 /*
763 * This is used to look up the divisor speeds and the timeouts
764 * We're normally limited to 15 distinct baud rates. The extra
765 * are accessed via settings in info->flags.
766 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
767 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
768 * HI VHI
769 * 20
770 */
771 static int baud_table[] = {
772 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
773 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
774 230400, 0};
775
776 static char baud_co_25[] = { /* 25 MHz clock option table */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
780 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
781
782 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
783 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
784 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
785
786 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
787 /* value => 00 01 02 03 04 */
788 /* divide by 8 32 128 512 2048 */
789 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
790 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
791 0x00};
792
793 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
794 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
795 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
796 0x21};
797
798 static char baud_cor3[] = { /* receive threshold */
799 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
800 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
801 0x07};
802
803 /*
804 * The Cyclades driver implements HW flow control as any serial driver.
805 * The cyclades_port structure member rflow and the vector rflow_thr
806 * allows us to take advantage of a special feature in the CD1400 to avoid
807 * data loss even when the system interrupt latency is too high. These flags
808 * are to be used only with very special applications. Setting these flags
809 * requires the use of a special cable (DTR and RTS reversed). In the new
810 * CD1400-based boards (rev. 6.00 or later), there is no need for special
811 * cables.
812 */
813
814 static char rflow_thr[] = { /* rflow threshold */
815 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
816 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
817 0x0a};
818
819 /* The Cyclom-Ye has placed the sequential chips in non-sequential
820 * address order. This look-up table overcomes that problem.
821 */
822 static int cy_chip_offset [] =
823 { 0x0000,
824 0x0400,
825 0x0800,
826 0x0C00,
827 0x0200,
828 0x0600,
829 0x0A00,
830 0x0E00
831 };
832
833 /* PCI related definitions */
834
835 static unsigned short cy_pci_nboard;
836 static unsigned short cy_isa_nboard;
837 static unsigned short cy_nboard;
838 #ifdef CONFIG_PCI
839 static unsigned short cy_pci_dev_id[] = {
840 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
841 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
842 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
843 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
844 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
845 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
846 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
847 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
848 0 /* end of table */
849 };
850 #endif
851
852 static void cy_start(struct tty_struct *);
853 static void set_line_char(struct cyclades_port *);
854 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
855 #ifdef CONFIG_ISA
856 static unsigned detect_isa_irq(void __iomem *);
857 #endif /* CONFIG_ISA */
858
859 static int cyclades_get_proc_info(char *, char **, off_t , int , int *, void *);
860
861 #ifndef CONFIG_CYZ_INTR
862 static void cyz_poll(unsigned long);
863
864 /* The Cyclades-Z polling cycle is defined by this variable */
865 static long cyz_polling_cycle = CZ_DEF_POLL;
866
867 static int cyz_timeron = 0;
868 static struct timer_list cyz_timerlist = TIMER_INITIALIZER(cyz_poll, 0, 0);
869
870 #else /* CONFIG_CYZ_INTR */
871 static void cyz_rx_restart(unsigned long);
872 static struct timer_list cyz_rx_full_timer[NR_PORTS];
873 #endif /* CONFIG_CYZ_INTR */
874
875 static inline int
876 serial_paranoia_check(struct cyclades_port *info,
877 char *name, const char *routine)
878 {
879 #ifdef SERIAL_PARANOIA_CHECK
880 static const char *badmagic =
881 "cyc Warning: bad magic number for serial struct (%s) in %s\n";
882 static const char *badinfo =
883 "cyc Warning: null cyclades_port for (%s) in %s\n";
884 static const char *badrange =
885 "cyc Warning: cyclades_port out of range for (%s) in %s\n";
886
887 if (!info) {
888 printk(badinfo, name, routine);
889 return 1;
890 }
891
892 if( (long)info < (long)(&cy_port[0])
893 || (long)(&cy_port[NR_PORTS]) < (long)info ){
894 printk(badrange, name, routine);
895 return 1;
896 }
897
898 if (info->magic != CYCLADES_MAGIC) {
899 printk(badmagic, name, routine);
900 return 1;
901 }
902 #endif
903 return 0;
904 } /* serial_paranoia_check */
905
906 /*
907 * This routine is used by the interrupt handler to schedule
908 * processing in the software interrupt portion of the driver
909 * (also known as the "bottom half"). This can be called any
910 * number of times for any channel without harm.
911 */
912 static inline void
913 cy_sched_event(struct cyclades_port *info, int event)
914 {
915 info->event |= 1 << event; /* remember what kind of event and who */
916 schedule_work(&info->tqueue);
917 } /* cy_sched_event */
918
919
920 /*
921 * This routine is used to handle the "bottom half" processing for the
922 * serial driver, known also the "software interrupt" processing.
923 * This processing is done at the kernel interrupt level, after the
924 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
925 * is where time-consuming activities which can not be done in the
926 * interrupt driver proper are done; the interrupt driver schedules
927 * them using cy_sched_event(), and they get done here.
928 *
929 * This is done through one level of indirection--the task queue.
930 * When a hardware interrupt service routine wants service by the
931 * driver's bottom half, it enqueues the appropriate tq_struct (one
932 * per port) to the keventd work queue and sets a request flag
933 * that the work queue be processed.
934 *
935 * Although this may seem unwieldy, it gives the system a way to
936 * pass an argument (in this case the pointer to the cyclades_port
937 * structure) to the bottom half of the driver. Previous kernels
938 * had to poll every port to see if that port needed servicing.
939 */
940 static void
941 do_softint(void *private_)
942 {
943 struct cyclades_port *info = (struct cyclades_port *) private_;
944 struct tty_struct *tty;
945
946 tty = info->tty;
947 if (!tty)
948 return;
949
950 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
951 tty_hangup(info->tty);
952 wake_up_interruptible(&info->open_wait);
953 info->flags &= ~ASYNC_NORMAL_ACTIVE;
954 }
955 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
956 wake_up_interruptible(&info->open_wait);
957 }
958 #ifdef CONFIG_CYZ_INTR
959 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
960 if (cyz_rx_full_timer[info->line].function == NULL) {
961 cyz_rx_full_timer[info->line].expires = jiffies + 1;
962 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
963 cyz_rx_full_timer[info->line].data = (unsigned long)info;
964 add_timer(&cyz_rx_full_timer[info->line]);
965 }
966 }
967 #endif
968 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
969 wake_up_interruptible(&info->delta_msr_wait);
970 }
971 if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
972 tty_wakeup(tty);
973 wake_up_interruptible(&tty->write_wait);
974 }
975 #ifdef Z_WAKE
976 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
977 wake_up_interruptible(&info->shutdown_wait);
978 }
979 #endif
980 } /* do_softint */
981
982
983 /***********************************************************/
984 /********* Start of block of Cyclom-Y specific code ********/
985
986 /* This routine waits up to 1000 micro-seconds for the previous
987 command to the Cirrus chip to complete and then issues the
988 new command. An error is returned if the previous command
989 didn't finish within the time limit.
990
991 This function is only called from inside spinlock-protected code.
992 */
993 static int
994 cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
995 {
996 volatile int i;
997
998 /* Check to see that the previous command has completed */
999 for(i = 0 ; i < 100 ; i++){
1000 if (cy_readb(base_addr+(CyCCR<<index)) == 0){
1001 break;
1002 }
1003 udelay(10L);
1004 }
1005 /* if the CCR never cleared, the previous command
1006 didn't finish within the "reasonable time" */
1007 if (i == 100) return (-1);
1008
1009 /* Issue the new command */
1010 cy_writeb(base_addr+(CyCCR<<index), cmd);
1011
1012 return(0);
1013 } /* cyy_issue_cmd */
1014
1015 #ifdef CONFIG_ISA
1016 /* ISA interrupt detection code */
1017 static unsigned
1018 detect_isa_irq(void __iomem *address)
1019 {
1020 int irq;
1021 unsigned long irqs, flags;
1022 int save_xir, save_car;
1023 int index = 0; /* IRQ probing is only for ISA */
1024
1025 /* forget possible initially masked and pending IRQ */
1026 irq = probe_irq_off(probe_irq_on());
1027
1028 /* Clear interrupts on the board first */
1029 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1030 /* Cy_ClrIntr is 0x1800 */
1031
1032 irqs = probe_irq_on();
1033 /* Wait ... */
1034 udelay(5000L);
1035
1036 /* Enable the Tx interrupts on the CD1400 */
1037 local_irq_save(flags);
1038 cy_writeb(address + (CyCAR<<index), 0);
1039 cyy_issue_cmd(address, CyCHAN_CTL|CyENB_XMTR, index);
1040
1041 cy_writeb(address + (CyCAR<<index), 0);
1042 cy_writeb(address + (CySRER<<index),
1043 cy_readb(address + (CySRER<<index)) | CyTxRdy);
1044 local_irq_restore(flags);
1045
1046 /* Wait ... */
1047 udelay(5000L);
1048
1049 /* Check which interrupt is in use */
1050 irq = probe_irq_off(irqs);
1051
1052 /* Clean up */
1053 save_xir = (u_char) cy_readb(address + (CyTIR<<index));
1054 save_car = cy_readb(address + (CyCAR<<index));
1055 cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
1056 cy_writeb(address + (CySRER<<index),
1057 cy_readb(address + (CySRER<<index)) & ~CyTxRdy);
1058 cy_writeb(address + (CyTIR<<index), (save_xir & 0x3f));
1059 cy_writeb(address + (CyCAR<<index), (save_car));
1060 cy_writeb(address + (Cy_ClrIntr<<index), 0);
1061 /* Cy_ClrIntr is 0x1800 */
1062
1063 return (irq > 0)? irq : 0;
1064 }
1065 #endif /* CONFIG_ISA */
1066
1067 /* The real interrupt service routine is called
1068 whenever the card wants its hand held--chars
1069 received, out buffer empty, modem change, etc.
1070 */
1071 static irqreturn_t
1072 cyy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1073 {
1074 struct tty_struct *tty;
1075 int status;
1076 struct cyclades_card *cinfo;
1077 struct cyclades_port *info;
1078 void __iomem *base_addr, *card_base_addr;
1079 int chip;
1080 int save_xir, channel, save_car;
1081 char data;
1082 volatile int char_count;
1083 int outch;
1084 int i,j,index;
1085 int too_many;
1086 int had_work;
1087 int mdm_change;
1088 int mdm_status;
1089
1090 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1091 #ifdef CY_DEBUG_INTERRUPTS
1092 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1093 #endif
1094 return IRQ_NONE; /* spurious interrupt */
1095 }
1096
1097 card_base_addr = cinfo->base_addr;
1098 index = cinfo->bus_index;
1099
1100
1101 /* This loop checks all chips in the card. Make a note whenever
1102 _any_ chip had some work to do, as this is considered an
1103 indication that there will be more to do. Only when no chip
1104 has any work does this outermost loop exit.
1105 */
1106 do{
1107 had_work = 0;
1108 for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
1109 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
1110 too_many = 0;
1111 while ( (status = cy_readb(base_addr+(CySVRR<<index))) != 0x00) {
1112 had_work++;
1113 /* The purpose of the following test is to ensure that
1114 no chip can monopolize the driver. This forces the
1115 chips to be checked in a round-robin fashion (after
1116 draining each of a bunch (1000) of characters).
1117 */
1118 if(1000<too_many++){
1119 break;
1120 }
1121 if (status & CySRReceive) { /* reception interrupt */
1122 #ifdef CY_DEBUG_INTERRUPTS
1123 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1124 #endif
1125 /* determine the channel & change to that context */
1126 spin_lock(&cinfo->card_lock);
1127 save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
1128 channel = (u_short ) (save_xir & CyIRChannel);
1129 i = channel + chip * 4 + cinfo->first_line;
1130 info = &cy_port[i];
1131 info->last_active = jiffies;
1132 save_car = cy_readb(base_addr+(CyCAR<<index));
1133 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1134
1135 /* if there is nowhere to put the data, discard it */
1136 if(info->tty == 0){
1137 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1138 if ( j == CyIVRRxEx ) { /* exception */
1139 data = cy_readb(base_addr+(CyRDSR<<index));
1140 } else { /* normal character reception */
1141 char_count = cy_readb(base_addr+(CyRDCR<<index));
1142 while(char_count--){
1143 data = cy_readb(base_addr+(CyRDSR<<index));
1144 }
1145 }
1146 }else{ /* there is an open port for this data */
1147 tty = info->tty;
1148 j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
1149 if ( j == CyIVRRxEx ) { /* exception */
1150 data = cy_readb(base_addr+(CyRDSR<<index));
1151
1152 /* For statistics only */
1153 if (data & CyBREAK)
1154 info->icount.brk++;
1155 else if(data & CyFRAME)
1156 info->icount.frame++;
1157 else if(data & CyPARITY)
1158 info->icount.parity++;
1159 else if(data & CyOVERRUN)
1160 info->icount.overrun++;
1161
1162 if(data & info->ignore_status_mask){
1163 info->icount.rx++;
1164 continue;
1165 }
1166 if (tty->flip.count < TTY_FLIPBUF_SIZE){
1167 tty->flip.count++;
1168 if (data & info->read_status_mask){
1169 if(data & CyBREAK){
1170 *tty->flip.flag_buf_ptr++ =
1171 TTY_BREAK;
1172 *tty->flip.char_buf_ptr++ =
1173 cy_readb(base_addr+(CyRDSR<<index));
1174 info->icount.rx++;
1175 if (info->flags & ASYNC_SAK){
1176 do_SAK(tty);
1177 }
1178 }else if(data & CyFRAME){
1179 *tty->flip.flag_buf_ptr++ =
1180 TTY_FRAME;
1181 *tty->flip.char_buf_ptr++ =
1182 cy_readb(base_addr+(CyRDSR<<index));
1183 info->icount.rx++;
1184 info->idle_stats.frame_errs++;
1185 }else if(data & CyPARITY){
1186 *tty->flip.flag_buf_ptr++ =
1187 TTY_PARITY;
1188 *tty->flip.char_buf_ptr++ =
1189 cy_readb(base_addr+(CyRDSR<<index));
1190 info->icount.rx++;
1191 info->idle_stats.parity_errs++;
1192 }else if(data & CyOVERRUN){
1193 *tty->flip.flag_buf_ptr++ =
1194 TTY_OVERRUN;
1195 *tty->flip.char_buf_ptr++ = 0;
1196 info->icount.rx++;
1197 /* If the flip buffer itself is
1198 overflowing, we still lose
1199 the next incoming character.
1200 */
1201 if(tty->flip.count
1202 < TTY_FLIPBUF_SIZE){
1203 tty->flip.count++;
1204 *tty->flip.flag_buf_ptr++ =
1205 TTY_NORMAL;
1206 *tty->flip.char_buf_ptr++ =
1207 cy_readb(base_addr+(CyRDSR<<index));
1208 info->icount.rx++;
1209 }
1210 info->idle_stats.overruns++;
1211 /* These two conditions may imply */
1212 /* a normal read should be done. */
1213 /* }else if(data & CyTIMEOUT){ */
1214 /* }else if(data & CySPECHAR){ */
1215 }else{
1216 *tty->flip.flag_buf_ptr++ = 0;
1217 *tty->flip.char_buf_ptr++ = 0;
1218 info->icount.rx++;
1219 }
1220 }else{
1221 *tty->flip.flag_buf_ptr++ = 0;
1222 *tty->flip.char_buf_ptr++ = 0;
1223 info->icount.rx++;
1224 }
1225 }else{
1226 /* there was a software buffer
1227 overrun and nothing could be
1228 done about it!!! */
1229 info->icount.buf_overrun++;
1230 info->idle_stats.overruns++;
1231 }
1232 } else { /* normal character reception */
1233 /* load # chars available from the chip */
1234 char_count = cy_readb(base_addr+(CyRDCR<<index));
1235
1236 #ifdef CY_ENABLE_MONITORING
1237 ++info->mon.int_count;
1238 info->mon.char_count += char_count;
1239 if (char_count > info->mon.char_max)
1240 info->mon.char_max = char_count;
1241 info->mon.char_last = char_count;
1242 #endif
1243 while(char_count--){
1244 if (tty->flip.count >= TTY_FLIPBUF_SIZE){
1245 break;
1246 }
1247 tty->flip.count++;
1248 data = cy_readb(base_addr+(CyRDSR<<index));
1249 *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
1250 *tty->flip.char_buf_ptr++ = data;
1251 info->idle_stats.recv_bytes++;
1252 info->icount.rx++;
1253 #ifdef CY_16Y_HACK
1254 udelay(10L);
1255 #endif
1256 }
1257 info->idle_stats.recv_idle = jiffies;
1258 }
1259 schedule_delayed_work(&tty->flip.work, 1);
1260 }
1261 /* end of service */
1262 cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
1263 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1264 spin_unlock(&cinfo->card_lock);
1265 }
1266
1267
1268 if (status & CySRTransmit) { /* transmission interrupt */
1269 /* Since we only get here when the transmit buffer
1270 is empty, we know we can always stuff a dozen
1271 characters. */
1272 #ifdef CY_DEBUG_INTERRUPTS
1273 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1274 #endif
1275
1276 /* determine the channel & change to that context */
1277 spin_lock(&cinfo->card_lock);
1278 save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
1279 channel = (u_short ) (save_xir & CyIRChannel);
1280 i = channel + chip * 4 + cinfo->first_line;
1281 save_car = cy_readb(base_addr+(CyCAR<<index));
1282 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1283
1284 /* validate the port# (as configured and open) */
1285 if( (i < 0) || (NR_PORTS <= i) ){
1286 cy_writeb(base_addr+(CySRER<<index),
1287 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1288 goto txend;
1289 }
1290 info = &cy_port[i];
1291 info->last_active = jiffies;
1292 if(info->tty == 0){
1293 cy_writeb(base_addr+(CySRER<<index),
1294 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
1295 goto txdone;
1296 }
1297
1298 /* load the on-chip space for outbound data */
1299 char_count = info->xmit_fifo_size;
1300
1301 if(info->x_char) { /* send special char */
1302 outch = info->x_char;
1303 cy_writeb(base_addr+(CyTDR<<index), outch);
1304 char_count--;
1305 info->icount.tx++;
1306 info->x_char = 0;
1307 }
1308
1309 if (info->breakon || info->breakoff) {
1310 if (info->breakon) {
1311 cy_writeb(base_addr + (CyTDR<<index), 0);
1312 cy_writeb(base_addr + (CyTDR<<index), 0x81);
1313 info->breakon = 0;
1314 char_count -= 2;
1315 }
1316 if (info->breakoff) {
1317 cy_writeb(base_addr + (CyTDR<<index), 0);
1318 cy_writeb(base_addr + (CyTDR<<index), 0x83);
1319 info->breakoff = 0;
1320 char_count -= 2;
1321 }
1322 }
1323
1324 while (char_count-- > 0){
1325 if (!info->xmit_cnt){
1326 if (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
1327 cy_writeb(base_addr+(CySRER<<index),
1328 cy_readb(base_addr+(CySRER<<index)) &
1329 ~CyTxMpty);
1330 } else {
1331 cy_writeb(base_addr+(CySRER<<index),
1332 ((cy_readb(base_addr+(CySRER<<index))
1333 & ~CyTxRdy)
1334 | CyTxMpty));
1335 }
1336 goto txdone;
1337 }
1338 if (info->xmit_buf == 0){
1339 cy_writeb(base_addr+(CySRER<<index),
1340 cy_readb(base_addr+(CySRER<<index)) &
1341 ~CyTxRdy);
1342 goto txdone;
1343 }
1344 if (info->tty->stopped || info->tty->hw_stopped){
1345 cy_writeb(base_addr+(CySRER<<index),
1346 cy_readb(base_addr+(CySRER<<index)) &
1347 ~CyTxRdy);
1348 goto txdone;
1349 }
1350 /* Because the Embedded Transmit Commands have
1351 been enabled, we must check to see if the
1352 escape character, NULL, is being sent. If it
1353 is, we must ensure that there is room for it
1354 to be doubled in the output stream. Therefore
1355 we no longer advance the pointer when the
1356 character is fetched, but rather wait until
1357 after the check for a NULL output character.
1358 This is necessary because there may not be
1359 room for the two chars needed to send a NULL.)
1360 */
1361 outch = info->xmit_buf[info->xmit_tail];
1362 if( outch ){
1363 info->xmit_cnt--;
1364 info->xmit_tail = (info->xmit_tail + 1)
1365 & (SERIAL_XMIT_SIZE - 1);
1366 cy_writeb(base_addr+(CyTDR<<index), outch);
1367 info->icount.tx++;
1368 }else{
1369 if(char_count > 1){
1370 info->xmit_cnt--;
1371 info->xmit_tail = (info->xmit_tail + 1)
1372 & (SERIAL_XMIT_SIZE - 1);
1373 cy_writeb(base_addr+(CyTDR<<index),
1374 outch);
1375 cy_writeb(base_addr+(CyTDR<<index), 0);
1376 info->icount.tx++;
1377 char_count--;
1378 }else{
1379 }
1380 }
1381 }
1382
1383 txdone:
1384 if (info->xmit_cnt < WAKEUP_CHARS) {
1385 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1386 }
1387 txend:
1388 /* end of service */
1389 cy_writeb(base_addr+(CyTIR<<index),
1390 (save_xir & 0x3f));
1391 cy_writeb(base_addr+(CyCAR<<index), (save_car));
1392 spin_unlock(&cinfo->card_lock);
1393 }
1394
1395 if (status & CySRModem) { /* modem interrupt */
1396
1397 /* determine the channel & change to that context */
1398 spin_lock(&cinfo->card_lock);
1399 save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
1400 channel = (u_short ) (save_xir & CyIRChannel);
1401 info = &cy_port[channel + chip * 4
1402 + cinfo->first_line];
1403 info->last_active = jiffies;
1404 save_car = cy_readb(base_addr+(CyCAR<<index));
1405 cy_writeb(base_addr+(CyCAR<<index), save_xir);
1406
1407 mdm_change = cy_readb(base_addr+(CyMISR<<index));
1408 mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
1409
1410 if(info->tty == 0){/* no place for data, ignore it*/
1411 ;
1412 }else{
1413 if (mdm_change & CyANY_DELTA) {
1414 /* For statistics only */
1415 if (mdm_change & CyDCD) info->icount.dcd++;
1416 if (mdm_change & CyCTS) info->icount.cts++;
1417 if (mdm_change & CyDSR) info->icount.dsr++;
1418 if (mdm_change & CyRI) info->icount.rng++;
1419
1420 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1421 }
1422
1423 if((mdm_change & CyDCD)
1424 && (info->flags & ASYNC_CHECK_CD)){
1425 if(mdm_status & CyDCD){
1426 cy_sched_event(info,
1427 Cy_EVENT_OPEN_WAKEUP);
1428 }else{
1429 cy_sched_event(info,
1430 Cy_EVENT_HANGUP);
1431 }
1432 }
1433 if((mdm_change & CyCTS)
1434 && (info->flags & ASYNC_CTS_FLOW)){
1435 if(info->tty->hw_stopped){
1436 if(mdm_status & CyCTS){
1437 /* cy_start isn't used
1438 because... !!! */
1439 info->tty->hw_stopped = 0;
1440 cy_writeb(base_addr+(CySRER<<index),
1441 cy_readb(base_addr+(CySRER<<index)) |
1442 CyTxRdy);
1443 cy_sched_event(info,
1444 Cy_EVENT_WRITE_WAKEUP);
1445 }
1446 }else{
1447 if(!(mdm_status & CyCTS)){
1448 /* cy_stop isn't used
1449 because ... !!! */
1450 info->tty->hw_stopped = 1;
1451 cy_writeb(base_addr+(CySRER<<index),
1452 cy_readb(base_addr+(CySRER<<index)) &
1453 ~CyTxRdy);
1454 }
1455 }
1456 }
1457 if(mdm_change & CyDSR){
1458 }
1459 if(mdm_change & CyRI){
1460 }
1461 }
1462 /* end of service */
1463 cy_writeb(base_addr+(CyMIR<<index),
1464 (save_xir & 0x3f));
1465 cy_writeb(base_addr+(CyCAR<<index), save_car);
1466 spin_unlock(&cinfo->card_lock);
1467 }
1468 } /* end while status != 0 */
1469 } /* end loop for chips... */
1470 } while(had_work);
1471
1472 /* clear interrupts */
1473 spin_lock(&cinfo->card_lock);
1474 cy_writeb(card_base_addr + (Cy_ClrIntr<<index), 0);
1475 /* Cy_ClrIntr is 0x1800 */
1476 spin_unlock(&cinfo->card_lock);
1477 return IRQ_HANDLED;
1478 } /* cyy_interrupt */
1479
1480 /***********************************************************/
1481 /********* End of block of Cyclom-Y specific code **********/
1482 /******** Start of block of Cyclades-Z specific code *********/
1483 /***********************************************************/
1484
1485 static int
1486 cyz_fetch_msg( struct cyclades_card *cinfo,
1487 uclong *channel, ucchar *cmd, uclong *param)
1488 {
1489 struct FIRM_ID __iomem *firm_id;
1490 struct ZFW_CTRL __iomem *zfw_ctrl;
1491 struct BOARD_CTRL __iomem *board_ctrl;
1492 unsigned long loc_doorbell;
1493
1494 firm_id = cinfo->base_addr + ID_ADDRESS;
1495 if (!ISZLOADED(*cinfo)){
1496 return (-1);
1497 }
1498 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1499 board_ctrl = &zfw_ctrl->board_ctrl;
1500
1501 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1502 (cinfo->ctl_addr))->loc_doorbell);
1503 if (loc_doorbell){
1504 *cmd = (char)(0xff & loc_doorbell);
1505 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1506 *param = (uclong)cy_readl(&board_ctrl->fwcmd_param);
1507 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->loc_doorbell,
1508 0xffffffff);
1509 return 1;
1510 }
1511 return 0;
1512 } /* cyz_fetch_msg */
1513
1514 static int
1515 cyz_issue_cmd( struct cyclades_card *cinfo,
1516 uclong channel, ucchar cmd, uclong param)
1517 {
1518 struct FIRM_ID __iomem *firm_id;
1519 struct ZFW_CTRL __iomem *zfw_ctrl;
1520 struct BOARD_CTRL __iomem *board_ctrl;
1521 unsigned long __iomem *pci_doorbell;
1522 int index;
1523
1524 firm_id = cinfo->base_addr + ID_ADDRESS;
1525 if (!ISZLOADED(*cinfo)){
1526 return (-1);
1527 }
1528 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1529 board_ctrl = &zfw_ctrl->board_ctrl;
1530
1531 index = 0;
1532 pci_doorbell = &((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->pci_doorbell;
1533 while( (cy_readl(pci_doorbell) & 0xff) != 0){
1534 if (index++ == 1000){
1535 return((int)(cy_readl(pci_doorbell) & 0xff));
1536 }
1537 udelay(50L);
1538 }
1539 cy_writel(&board_ctrl->hcmd_channel, channel);
1540 cy_writel(&board_ctrl->hcmd_param , param);
1541 cy_writel(pci_doorbell, (long)cmd);
1542
1543 return(0);
1544 } /* cyz_issue_cmd */
1545
1546 static void
1547 cyz_handle_rx(struct cyclades_port *info,
1548 volatile struct CH_CTRL __iomem *ch_ctrl,
1549 volatile struct BUF_CTRL __iomem *buf_ctrl)
1550 {
1551 struct cyclades_card *cinfo = &cy_card[info->card];
1552 struct tty_struct *tty = info->tty;
1553 volatile int char_count;
1554 #ifdef BLOCKMOVE
1555 int small_count;
1556 #else
1557 char data;
1558 #endif
1559 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1560
1561 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1562 rx_put = cy_readl(&buf_ctrl->rx_put);
1563 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1564 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1565 if (rx_put >= rx_get)
1566 char_count = rx_put - rx_get;
1567 else
1568 char_count = rx_put - rx_get + rx_bufsize;
1569
1570 if ( char_count ) {
1571 info->last_active = jiffies;
1572 info->jiffies[1] = jiffies;
1573
1574 #ifdef CY_ENABLE_MONITORING
1575 info->mon.int_count++;
1576 info->mon.char_count += char_count;
1577 if (char_count > info->mon.char_max)
1578 info->mon.char_max = char_count;
1579 info->mon.char_last = char_count;
1580 #endif
1581 if(tty == 0){
1582 /* flush received characters */
1583 new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1);
1584 info->rflush_count++;
1585 }else{
1586 #ifdef BLOCKMOVE
1587 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1588 for performance, but because of buffer boundaries, there
1589 may be several steps to the operation */
1590 while(0 < (small_count =
1591 min_t(unsigned int, (rx_bufsize - new_rx_get),
1592 min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
1593 )) {
1594 memcpy_fromio(tty->flip.char_buf_ptr,
1595 (char *)(cinfo->base_addr
1596 + rx_bufaddr + new_rx_get),
1597 small_count);
1598
1599 tty->flip.char_buf_ptr += small_count;
1600 memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
1601 tty->flip.flag_buf_ptr += small_count;
1602 new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
1603 char_count -= small_count;
1604 info->icount.rx += small_count;
1605 info->idle_stats.recv_bytes += small_count;
1606 tty->flip.count += small_count;
1607 }
1608 #else
1609 while(char_count--){
1610 if (tty->flip.count >= N_TTY_BUF_SIZE - tty->read_cnt)
1611 break;
1612
1613 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
1614 break;
1615
1616 data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
1617 new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
1618 tty->flip.count++;
1619 *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
1620 *tty->flip.char_buf_ptr++ = data;
1621 info->idle_stats.recv_bytes++;
1622 info->icount.rx++;
1623 }
1624 #endif
1625 #ifdef CONFIG_CYZ_INTR
1626 /* Recalculate the number of chars in the RX buffer and issue
1627 a cmd in case it's higher than the RX high water mark */
1628 rx_put = cy_readl(&buf_ctrl->rx_put);
1629 if (rx_put >= rx_get)
1630 char_count = rx_put - rx_get;
1631 else
1632 char_count = rx_put - rx_get + rx_bufsize;
1633 if(char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1634 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1635 }
1636 #endif
1637 info->idle_stats.recv_idle = jiffies;
1638 schedule_delayed_work(&tty->flip.work, 1);
1639 }
1640 /* Update rx_get */
1641 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1642 }
1643 }
1644
1645 static void
1646 cyz_handle_tx(struct cyclades_port *info,
1647 volatile struct CH_CTRL __iomem *ch_ctrl,
1648 volatile struct BUF_CTRL __iomem *buf_ctrl)
1649 {
1650 struct cyclades_card *cinfo = &cy_card[info->card];
1651 struct tty_struct *tty = info->tty;
1652 char data;
1653 volatile int char_count;
1654 #ifdef BLOCKMOVE
1655 int small_count;
1656 #endif
1657 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1658
1659 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1660 return;
1661
1662 tx_get = cy_readl(&buf_ctrl->tx_get);
1663 tx_put = cy_readl(&buf_ctrl->tx_put);
1664 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1665 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1666 if (tx_put >= tx_get)
1667 char_count = tx_get - tx_put - 1 + tx_bufsize;
1668 else
1669 char_count = tx_get - tx_put - 1;
1670
1671 if ( char_count ) {
1672
1673 if( tty == 0 ){
1674 goto ztxdone;
1675 }
1676
1677 if(info->x_char) { /* send special char */
1678 data = info->x_char;
1679
1680 cy_writeb((cinfo->base_addr + tx_bufaddr + tx_put), data);
1681 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1682 info->x_char = 0;
1683 char_count--;
1684 info->icount.tx++;
1685 info->last_active = jiffies;
1686 info->jiffies[2] = jiffies;
1687 }
1688 #ifdef BLOCKMOVE
1689 while(0 < (small_count =
1690 min_t(unsigned int, (tx_bufsize - tx_put),
1691 min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail),
1692 min_t(unsigned int, info->xmit_cnt, char_count))))) {
1693
1694 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1695 &info->xmit_buf[info->xmit_tail],
1696 small_count);
1697
1698 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1699 char_count -= small_count;
1700 info->icount.tx += small_count;
1701 info->xmit_cnt -= small_count;
1702 info->xmit_tail =
1703 (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1);
1704 info->last_active = jiffies;
1705 info->jiffies[2] = jiffies;
1706 }
1707 #else
1708 while (info->xmit_cnt && char_count){
1709 data = info->xmit_buf[info->xmit_tail];
1710 info->xmit_cnt--;
1711 info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
1712
1713 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1714 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1715 char_count--;
1716 info->icount.tx++;
1717 info->last_active = jiffies;
1718 info->jiffies[2] = jiffies;
1719 }
1720 #endif
1721 ztxdone:
1722 if (info->xmit_cnt < WAKEUP_CHARS) {
1723 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1724 }
1725 /* Update tx_put */
1726 cy_writel(&buf_ctrl->tx_put, tx_put);
1727 }
1728 }
1729
1730 static void
1731 cyz_handle_cmd(struct cyclades_card *cinfo)
1732 {
1733 struct tty_struct *tty;
1734 struct cyclades_port *info;
1735 static volatile struct FIRM_ID __iomem *firm_id;
1736 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1737 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1738 static volatile struct CH_CTRL __iomem *ch_ctrl;
1739 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1740 uclong channel;
1741 ucchar cmd;
1742 uclong param;
1743 uclong hw_ver, fw_ver;
1744 int special_count;
1745 int delta_count;
1746
1747 firm_id = cinfo->base_addr + ID_ADDRESS;
1748 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1749 board_ctrl = &zfw_ctrl->board_ctrl;
1750 fw_ver = cy_readl(&board_ctrl->fw_version);
1751 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
1752
1753
1754 while(cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1755 special_count = 0;
1756 delta_count = 0;
1757 info = &cy_port[channel + cinfo->first_line];
1758 if((tty = info->tty) == 0) {
1759 continue;
1760 }
1761 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1762 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1763
1764 switch(cmd) {
1765 case C_CM_PR_ERROR:
1766 tty->flip.count++;
1767 *tty->flip.flag_buf_ptr++ = TTY_PARITY;
1768 *tty->flip.char_buf_ptr++ = 0;
1769 info->icount.rx++;
1770 special_count++;
1771 break;
1772 case C_CM_FR_ERROR:
1773 tty->flip.count++;
1774 *tty->flip.flag_buf_ptr++ = TTY_FRAME;
1775 *tty->flip.char_buf_ptr++ = 0;
1776 info->icount.rx++;
1777 special_count++;
1778 break;
1779 case C_CM_RXBRK:
1780 tty->flip.count++;
1781 *tty->flip.flag_buf_ptr++ = TTY_BREAK;
1782 *tty->flip.char_buf_ptr++ = 0;
1783 info->icount.rx++;
1784 special_count++;
1785 break;
1786 case C_CM_MDCD:
1787 info->icount.dcd++;
1788 delta_count++;
1789 if (info->flags & ASYNC_CHECK_CD){
1790 if ((fw_ver > 241 ?
1791 ((u_long)param) :
1792 cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
1793 cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
1794 }else{
1795 cy_sched_event(info, Cy_EVENT_HANGUP);
1796 }
1797 }
1798 break;
1799 case C_CM_MCTS:
1800 info->icount.cts++;
1801 delta_count++;
1802 break;
1803 case C_CM_MRI:
1804 info->icount.rng++;
1805 delta_count++;
1806 break;
1807 case C_CM_MDSR:
1808 info->icount.dsr++;
1809 delta_count++;
1810 break;
1811 #ifdef Z_WAKE
1812 case C_CM_IOCTLW:
1813 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1814 break;
1815 #endif
1816 #ifdef CONFIG_CYZ_INTR
1817 case C_CM_RXHIWM:
1818 case C_CM_RXNNDT:
1819 case C_CM_INTBACK2:
1820 /* Reception Interrupt */
1821 #ifdef CY_DEBUG_INTERRUPTS
1822 printk("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
1823 info->card, channel);
1824 #endif
1825 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1826 break;
1827 case C_CM_TXBEMPTY:
1828 case C_CM_TXLOWWM:
1829 case C_CM_INTBACK:
1830 /* Transmission Interrupt */
1831 #ifdef CY_DEBUG_INTERRUPTS
1832 printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
1833 info->card, channel);
1834 #endif
1835 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1836 break;
1837 #endif /* CONFIG_CYZ_INTR */
1838 case C_CM_FATAL:
1839 /* should do something with this !!! */
1840 break;
1841 default:
1842 break;
1843 }
1844 if(delta_count)
1845 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1846 if(special_count)
1847 schedule_delayed_work(&tty->flip.work, 1);
1848 }
1849 }
1850
1851 #ifdef CONFIG_CYZ_INTR
1852 static irqreturn_t
1853 cyz_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1854 {
1855 struct cyclades_card *cinfo;
1856
1857 if((cinfo = (struct cyclades_card *)dev_id) == 0){
1858 #ifdef CY_DEBUG_INTERRUPTS
1859 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1860 #endif
1861 return IRQ_NONE; /* spurious interrupt */
1862 }
1863
1864 if (!ISZLOADED(*cinfo)) {
1865 #ifdef CY_DEBUG_INTERRUPTS
1866 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1867 #endif
1868 return IRQ_NONE;
1869 }
1870
1871 /* Handle the interrupts */
1872 cyz_handle_cmd(cinfo);
1873
1874 return IRQ_HANDLED;
1875 } /* cyz_interrupt */
1876
1877 static void
1878 cyz_rx_restart(unsigned long arg)
1879 {
1880 struct cyclades_port *info = (struct cyclades_port *)arg;
1881 int retval;
1882 int card = info->card;
1883 uclong channel = (info->line) - (cy_card[card].first_line);
1884 unsigned long flags;
1885
1886 CY_LOCK(info, flags);
1887 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1888 if (retval != 0){
1889 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1890 info->line, retval);
1891 }
1892 cyz_rx_full_timer[info->line].function = NULL;
1893 CY_UNLOCK(info, flags);
1894 }
1895
1896 #else /* CONFIG_CYZ_INTR */
1897
1898 static void
1899 cyz_poll(unsigned long arg)
1900 {
1901 struct cyclades_card *cinfo;
1902 struct cyclades_port *info;
1903 struct tty_struct *tty;
1904 static volatile struct FIRM_ID *firm_id;
1905 static volatile struct ZFW_CTRL *zfw_ctrl;
1906 static volatile struct BOARD_CTRL *board_ctrl;
1907 static volatile struct CH_CTRL *ch_ctrl;
1908 static volatile struct BUF_CTRL *buf_ctrl;
1909 int card, port;
1910
1911 cyz_timerlist.expires = jiffies + (HZ);
1912 for (card = 0 ; card < NR_CARDS ; card++){
1913 cinfo = &cy_card[card];
1914
1915 if (!IS_CYC_Z(*cinfo)) continue;
1916 if (!ISZLOADED(*cinfo)) continue;
1917
1918 firm_id = cinfo->base_addr + ID_ADDRESS;
1919 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1920 board_ctrl = &(zfw_ctrl->board_ctrl);
1921
1922 /* Skip first polling cycle to avoid racing conditions with the FW */
1923 if (!cinfo->intr_enabled) {
1924 cinfo->nports = (int) cy_readl(&board_ctrl->n_channel);
1925 cinfo->intr_enabled = 1;
1926 continue;
1927 }
1928
1929 cyz_handle_cmd(cinfo);
1930
1931 for (port = 0 ; port < cinfo->nports ; port++) {
1932 info = &cy_port[ port + cinfo->first_line ];
1933 tty = info->tty;
1934 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1935 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1936
1937 if (!info->throttle)
1938 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1939 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1940 }
1941 /* poll every 'cyz_polling_cycle' period */
1942 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1943 }
1944 add_timer(&cyz_timerlist);
1945
1946 return;
1947 } /* cyz_poll */
1948
1949 #endif /* CONFIG_CYZ_INTR */
1950
1951 /********** End of block of Cyclades-Z specific code *********/
1952 /***********************************************************/
1953
1954
1955 /* This is called whenever a port becomes active;
1956 interrupts are enabled and DTR & RTS are turned on.
1957 */
1958 static int
1959 startup(struct cyclades_port * info)
1960 {
1961 unsigned long flags;
1962 int retval = 0;
1963 void __iomem *base_addr;
1964 int card,chip,channel,index;
1965 unsigned long page;
1966
1967 card = info->card;
1968 channel = (info->line) - (cy_card[card].first_line);
1969
1970 page = get_zeroed_page(GFP_KERNEL);
1971 if (!page)
1972 return -ENOMEM;
1973
1974 CY_LOCK(info, flags);
1975
1976 if (info->flags & ASYNC_INITIALIZED){
1977 free_page(page);
1978 goto errout;
1979 }
1980
1981 if (!info->type){
1982 if (info->tty){
1983 set_bit(TTY_IO_ERROR, &info->tty->flags);
1984 }
1985 free_page(page);
1986 goto errout;
1987 }
1988
1989 if (info->xmit_buf)
1990 free_page(page);
1991 else
1992 info->xmit_buf = (unsigned char *) page;
1993
1994 CY_UNLOCK(info, flags);
1995
1996 set_line_char(info);
1997
1998 if (!IS_CYC_Z(cy_card[card])) {
1999 chip = channel>>2;
2000 channel &= 0x03;
2001 index = cy_card[card].bus_index;
2002 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2003
2004 #ifdef CY_DEBUG_OPEN
2005 printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
2006 card, chip, channel, (long)base_addr);/**/
2007 #endif
2008
2009 CY_LOCK(info, flags);
2010
2011 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2012
2013 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
2014 ? info->default_timeout : 0x02)); /* 10ms rx timeout */
2015
2016 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index);
2017
2018 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2019 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
2020 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
2021
2022 #ifdef CY_DEBUG_DTR
2023 printk("cyc:startup raising DTR\n");
2024 printk(" status: 0x%x, 0x%x\n",
2025 cy_readb(base_addr+(CyMSVR1<<index)),
2026 cy_readb(base_addr+(CyMSVR2<<index)));
2027 #endif
2028
2029 cy_writeb(base_addr+(CySRER<<index),
2030 cy_readb(base_addr+(CySRER<<index)) | CyRxData);
2031 info->flags |= ASYNC_INITIALIZED;
2032
2033 if (info->tty){
2034 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2035 }
2036 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2037 info->breakon = info->breakoff = 0;
2038 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2039 info->idle_stats.in_use =
2040 info->idle_stats.recv_idle =
2041 info->idle_stats.xmit_idle = jiffies;
2042
2043 CY_UNLOCK(info, flags);
2044
2045 } else {
2046 struct FIRM_ID __iomem *firm_id;
2047 struct ZFW_CTRL __iomem *zfw_ctrl;
2048 struct BOARD_CTRL __iomem *board_ctrl;
2049 struct CH_CTRL __iomem *ch_ctrl;
2050 int retval;
2051
2052 base_addr = cy_card[card].base_addr;
2053
2054 firm_id = base_addr + ID_ADDRESS;
2055 if (!ISZLOADED(cy_card[card])){
2056 return -ENODEV;
2057 }
2058
2059 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2060 board_ctrl = &zfw_ctrl->board_ctrl;
2061 ch_ctrl = zfw_ctrl->ch_ctrl;
2062
2063 #ifdef CY_DEBUG_OPEN
2064 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2065 card, channel, (long)base_addr);/**/
2066 #endif
2067
2068 CY_LOCK(info, flags);
2069
2070 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2071 #ifdef Z_WAKE
2072 #ifdef CONFIG_CYZ_INTR
2073 cy_writel(&ch_ctrl[channel].intr_enable,
2074 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2075 C_IN_IOCTLW|
2076 C_IN_MDCD);
2077 #else
2078 cy_writel(&ch_ctrl[channel].intr_enable,
2079 C_IN_IOCTLW|
2080 C_IN_MDCD);
2081 #endif /* CONFIG_CYZ_INTR */
2082 #else
2083 #ifdef CONFIG_CYZ_INTR
2084 cy_writel(&ch_ctrl[channel].intr_enable,
2085 C_IN_TXBEMPTY|C_IN_TXLOWWM|C_IN_RXHIWM|C_IN_RXNNDT|
2086 C_IN_MDCD);
2087 #else
2088 cy_writel(&ch_ctrl[channel].intr_enable,
2089 C_IN_MDCD);
2090 #endif /* CONFIG_CYZ_INTR */
2091 #endif /* Z_WAKE */
2092
2093 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2094 if (retval != 0){
2095 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2096 info->line, retval);
2097 }
2098
2099 /* Flush RX buffers before raising DTR and RTS */
2100 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
2101 if (retval != 0){
2102 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2103 info->line, retval);
2104 }
2105
2106 /* set timeout !!! */
2107 /* set RTS and DTR !!! */
2108 cy_writel(&ch_ctrl[channel].rs_control,
2109 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
2110 retval = cyz_issue_cmd(&cy_card[info->card],
2111 channel, C_CM_IOCTLM, 0L);
2112 if (retval != 0){
2113 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2114 info->line, retval);
2115 }
2116 #ifdef CY_DEBUG_DTR
2117 printk("cyc:startup raising Z DTR\n");
2118 #endif
2119
2120 /* enable send, recv, modem !!! */
2121
2122 info->flags |= ASYNC_INITIALIZED;
2123 if (info->tty){
2124 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2125 }
2126 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2127 info->breakon = info->breakoff = 0;
2128 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2129 info->idle_stats.in_use =
2130 info->idle_stats.recv_idle =
2131 info->idle_stats.xmit_idle = jiffies;
2132
2133 CY_UNLOCK(info, flags);
2134 }
2135
2136 #ifdef CY_DEBUG_OPEN
2137 printk(" cyc startup done\n");
2138 #endif
2139 return 0;
2140
2141 errout:
2142 CY_UNLOCK(info, flags);
2143 return retval;
2144 } /* startup */
2145
2146
2147 static void
2148 start_xmit( struct cyclades_port *info )
2149 {
2150 unsigned long flags;
2151 void __iomem *base_addr;
2152 int card,chip,channel,index;
2153
2154 card = info->card;
2155 channel = (info->line) - (cy_card[card].first_line);
2156 if (!IS_CYC_Z(cy_card[card])) {
2157 chip = channel>>2;
2158 channel &= 0x03;
2159 index = cy_card[card].bus_index;
2160 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2161
2162 CY_LOCK(info, flags);
2163 cy_writeb(base_addr+(CyCAR<<index), channel);
2164 cy_writeb(base_addr+(CySRER<<index),
2165 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
2166 CY_UNLOCK(info, flags);
2167 } else {
2168 #ifdef CONFIG_CYZ_INTR
2169 int retval;
2170
2171 CY_LOCK(info, flags);
2172 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
2173 if (retval != 0){
2174 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2175 info->line, retval);
2176 }
2177 CY_UNLOCK(info, flags);
2178 #else /* CONFIG_CYZ_INTR */
2179 /* Don't have to do anything at this time */
2180 #endif /* CONFIG_CYZ_INTR */
2181 }
2182 } /* start_xmit */
2183
2184 /*
2185 * This routine shuts down a serial port; interrupts are disabled,
2186 * and DTR is dropped if the hangup on close termio flag is on.
2187 */
2188 static void
2189 shutdown(struct cyclades_port * info)
2190 {
2191 unsigned long flags;
2192 void __iomem *base_addr;
2193 int card,chip,channel,index;
2194
2195 if (!(info->flags & ASYNC_INITIALIZED)){
2196 return;
2197 }
2198
2199 card = info->card;
2200 channel = info->line - cy_card[card].first_line;
2201 if (!IS_CYC_Z(cy_card[card])) {
2202 chip = channel>>2;
2203 channel &= 0x03;
2204 index = cy_card[card].bus_index;
2205 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2206
2207 #ifdef CY_DEBUG_OPEN
2208 printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
2209 card, chip, channel, (long)base_addr);
2210 #endif
2211
2212 CY_LOCK(info, flags);
2213
2214 /* Clear delta_msr_wait queue to avoid mem leaks. */
2215 wake_up_interruptible(&info->delta_msr_wait);
2216
2217 if (info->xmit_buf){
2218 unsigned char * temp;
2219 temp = info->xmit_buf;
2220 info->xmit_buf = NULL;
2221 free_page((unsigned long) temp);
2222 }
2223 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2224 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2225 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
2226 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
2227 #ifdef CY_DEBUG_DTR
2228 printk("cyc shutdown dropping DTR\n");
2229 printk(" status: 0x%x, 0x%x\n",
2230 cy_readb(base_addr+(CyMSVR1<<index)),
2231 cy_readb(base_addr+(CyMSVR2<<index)));
2232 #endif
2233 }
2234 cyy_issue_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR,index);
2235 /* it may be appropriate to clear _XMIT at
2236 some later date (after testing)!!! */
2237
2238 if (info->tty){
2239 set_bit(TTY_IO_ERROR, &info->tty->flags);
2240 }
2241 info->flags &= ~ASYNC_INITIALIZED;
2242 CY_UNLOCK(info, flags);
2243 } else {
2244 struct FIRM_ID __iomem *firm_id;
2245 struct ZFW_CTRL __iomem *zfw_ctrl;
2246 struct BOARD_CTRL __iomem *board_ctrl;
2247 struct CH_CTRL __iomem *ch_ctrl;
2248 int retval;
2249
2250 base_addr = cy_card[card].base_addr;
2251 #ifdef CY_DEBUG_OPEN
2252 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2253 card, channel, (long)base_addr);
2254 #endif
2255
2256 firm_id = base_addr + ID_ADDRESS;
2257 if (!ISZLOADED(cy_card[card])) {
2258 return;
2259 }
2260
2261 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2262 board_ctrl = &zfw_ctrl->board_ctrl;
2263 ch_ctrl = zfw_ctrl->ch_ctrl;
2264
2265 CY_LOCK(info, flags);
2266
2267 if (info->xmit_buf){
2268 unsigned char * temp;
2269 temp = info->xmit_buf;
2270 info->xmit_buf = NULL;
2271 free_page((unsigned long) temp);
2272 }
2273
2274 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2275 cy_writel(&ch_ctrl[channel].rs_control,
2276 (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
2277 ~(C_RS_RTS | C_RS_DTR)));
2278 retval = cyz_issue_cmd(&cy_card[info->card],
2279 channel, C_CM_IOCTLM, 0L);
2280 if (retval != 0){
2281 printk("cyc:shutdown retval on ttyC%d was %x\n",
2282 info->line, retval);
2283 }
2284 #ifdef CY_DEBUG_DTR
2285 printk("cyc:shutdown dropping Z DTR\n");
2286 #endif
2287 }
2288
2289 if (info->tty){
2290 set_bit(TTY_IO_ERROR, &info->tty->flags);
2291 }
2292 info->flags &= ~ASYNC_INITIALIZED;
2293
2294 CY_UNLOCK(info, flags);
2295 }
2296
2297 #ifdef CY_DEBUG_OPEN
2298 printk(" cyc shutdown done\n");
2299 #endif
2300 return;
2301 } /* shutdown */
2302
2303
2304 /*
2305 * ------------------------------------------------------------
2306 * cy_open() and friends
2307 * ------------------------------------------------------------
2308 */
2309
2310 static int
2311 block_til_ready(struct tty_struct *tty, struct file * filp,
2312 struct cyclades_port *info)
2313 {
2314 DECLARE_WAITQUEUE(wait, current);
2315 struct cyclades_card *cinfo;
2316 unsigned long flags;
2317 int chip, channel,index;
2318 int retval;
2319 void __iomem *base_addr;
2320
2321 cinfo = &cy_card[info->card];
2322 channel = info->line - cinfo->first_line;
2323
2324 /*
2325 * If the device is in the middle of being closed, then block
2326 * until it's done, and then try again.
2327 */
2328 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2329 if (info->flags & ASYNC_CLOSING) {
2330 interruptible_sleep_on(&info->close_wait);
2331 }
2332 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2333 }
2334
2335 /*
2336 * If non-blocking mode is set, then make the check up front
2337 * and then exit.
2338 */
2339 if ((filp->f_flags & O_NONBLOCK) ||
2340 (tty->flags & (1 << TTY_IO_ERROR))) {
2341 info->flags |= ASYNC_NORMAL_ACTIVE;
2342 return 0;
2343 }
2344
2345 /*
2346 * Block waiting for the carrier detect and the line to become
2347 * free (i.e., not in use by the callout). While we are in
2348 * this loop, info->count is dropped by one, so that
2349 * cy_close() knows when to free things. We restore it upon
2350 * exit, either normal or abnormal.
2351 */
2352 retval = 0;
2353 add_wait_queue(&info->open_wait, &wait);
2354 #ifdef CY_DEBUG_OPEN
2355 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2356 info->line, info->count);/**/
2357 #endif
2358 CY_LOCK(info, flags);
2359 if (!tty_hung_up_p(filp))
2360 info->count--;
2361 CY_UNLOCK(info, flags);
2362 #ifdef CY_DEBUG_COUNT
2363 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2364 current->pid, info->count);
2365 #endif
2366 info->blocked_open++;
2367
2368 if (!IS_CYC_Z(*cinfo)) {
2369 chip = channel>>2;
2370 channel &= 0x03;
2371 index = cinfo->bus_index;
2372 base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
2373
2374 while (1) {
2375 CY_LOCK(info, flags);
2376 if ((tty->termios->c_cflag & CBAUD)){
2377 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2378 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
2379 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
2380 #ifdef CY_DEBUG_DTR
2381 printk("cyc:block_til_ready raising DTR\n");
2382 printk(" status: 0x%x, 0x%x\n",
2383 cy_readb(base_addr+(CyMSVR1<<index)),
2384 cy_readb(base_addr+(CyMSVR2<<index)));
2385 #endif
2386 }
2387 CY_UNLOCK(info, flags);
2388
2389 set_current_state(TASK_INTERRUPTIBLE);
2390 if (tty_hung_up_p(filp)
2391 || !(info->flags & ASYNC_INITIALIZED) ){
2392 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2393 -EAGAIN : -ERESTARTSYS);
2394 break;
2395 }
2396
2397 CY_LOCK(info, flags);
2398 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2399 if (!(info->flags & ASYNC_CLOSING)
2400 && (C_CLOCAL(tty)
2401 || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
2402 CY_UNLOCK(info, flags);
2403 break;
2404 }
2405 CY_UNLOCK(info, flags);
2406
2407 if (signal_pending(current)) {
2408 retval = -ERESTARTSYS;
2409 break;
2410 }
2411 #ifdef CY_DEBUG_OPEN
2412 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2413 info->line, info->count);/**/
2414 #endif
2415 schedule();
2416 }
2417 } else {
2418 struct FIRM_ID __iomem *firm_id;
2419 struct ZFW_CTRL __iomem *zfw_ctrl;
2420 struct BOARD_CTRL __iomem *board_ctrl;
2421 struct CH_CTRL __iomem *ch_ctrl;
2422 int retval;
2423
2424 base_addr = cinfo->base_addr;
2425 firm_id = base_addr + ID_ADDRESS;
2426 if (!ISZLOADED(*cinfo)){
2427 current->state = TASK_RUNNING;
2428 remove_wait_queue(&info->open_wait, &wait);
2429 return -EINVAL;
2430 }
2431
2432 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2433 board_ctrl = &zfw_ctrl->board_ctrl;
2434 ch_ctrl = zfw_ctrl->ch_ctrl;
2435
2436 while (1) {
2437 if ((tty->termios->c_cflag & CBAUD)){
2438 cy_writel(&ch_ctrl[channel].rs_control,
2439 cy_readl(&ch_ctrl[channel].rs_control) |
2440 (C_RS_RTS | C_RS_DTR));
2441 retval = cyz_issue_cmd(&cy_card[info->card],
2442 channel, C_CM_IOCTLM, 0L);
2443 if (retval != 0){
2444 printk("cyc:block_til_ready retval on ttyC%d was %x\n",
2445 info->line, retval);
2446 }
2447 #ifdef CY_DEBUG_DTR
2448 printk("cyc:block_til_ready raising Z DTR\n");
2449 #endif
2450 }
2451
2452 set_current_state(TASK_INTERRUPTIBLE);
2453 if (tty_hung_up_p(filp)
2454 || !(info->flags & ASYNC_INITIALIZED) ){
2455 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2456 -EAGAIN : -ERESTARTSYS);
2457 break;
2458 }
2459 if (!(info->flags & ASYNC_CLOSING)
2460 && (C_CLOCAL(tty)
2461 || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
2462 break;
2463 }
2464 if (signal_pending(current)) {
2465 retval = -ERESTARTSYS;
2466 break;
2467 }
2468 #ifdef CY_DEBUG_OPEN
2469 printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
2470 info->line, info->count);/**/
2471 #endif
2472 schedule();
2473 }
2474 }
2475 current->state = TASK_RUNNING;
2476 remove_wait_queue(&info->open_wait, &wait);
2477 if (!tty_hung_up_p(filp)){
2478 info->count++;
2479 #ifdef CY_DEBUG_COUNT
2480 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2481 current->pid, info->count);
2482 #endif
2483 }
2484 info->blocked_open--;
2485 #ifdef CY_DEBUG_OPEN
2486 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2487 info->line, info->count);/**/
2488 #endif
2489 if (retval)
2490 return retval;
2491 info->flags |= ASYNC_NORMAL_ACTIVE;
2492 return 0;
2493 } /* block_til_ready */
2494
2495
2496 /*
2497 * This routine is called whenever a serial port is opened. It
2498 * performs the serial-specific initialization for the tty structure.
2499 */
2500 static int
2501 cy_open(struct tty_struct *tty, struct file * filp)
2502 {
2503 struct cyclades_port *info;
2504 int retval, line;
2505 unsigned long page;
2506
2507 line = tty->index;
2508 if ((line < 0) || (NR_PORTS <= line)){
2509 return -ENODEV;
2510 }
2511 info = &cy_port[line];
2512 if (info->line < 0){
2513 return -ENODEV;
2514 }
2515
2516 /* If the card's firmware hasn't been loaded,
2517 treat it as absent from the system. This
2518 will make the user pay attention.
2519 */
2520 if (IS_CYC_Z(cy_card[info->card])) {
2521 struct cyclades_card *cinfo = &cy_card[info->card];
2522 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2523
2524 if (!ISZLOADED(*cinfo)) {
2525 if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
2526 (cinfo->ctl_addr))->mail_box_0)) &&
2527 Z_FPGA_CHECK (*cinfo)) &&
2528 (ZFIRM_HLT == cy_readl (&firm_id->signature)))
2529 {
2530 printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
2531 } else {
2532 printk("cyc:Cyclades-Z firmware not yet loaded\n");
2533 }
2534 return -ENODEV;
2535 }
2536 #ifdef CONFIG_CYZ_INTR
2537 else {
2538 /* In case this Z board is operating in interrupt mode, its
2539 interrupts should be enabled as soon as the first open happens
2540 to one of its ports. */
2541 if (!cinfo->intr_enabled) {
2542 struct ZFW_CTRL __iomem *zfw_ctrl;
2543 struct BOARD_CTRL __iomem *board_ctrl;
2544
2545 zfw_ctrl = cinfo->base_addr + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
2546
2547 board_ctrl = &zfw_ctrl->board_ctrl;
2548
2549 /* Enable interrupts on the PLX chip */
2550 cy_writew(cinfo->ctl_addr+0x68,
2551 cy_readw(cinfo->ctl_addr+0x68)|0x0900);
2552 /* Enable interrupts on the FW */
2553 retval = cyz_issue_cmd(cinfo,
2554 0, C_CM_IRQ_ENBL, 0L);
2555 if (retval != 0){
2556 printk("cyc:IRQ enable retval was %x\n", retval);
2557 }
2558 cinfo->nports = (int) cy_readl (&board_ctrl->n_channel);
2559 cinfo->intr_enabled = 1;
2560 }
2561 }
2562 #endif /* CONFIG_CYZ_INTR */
2563 /* Make sure this Z port really exists in hardware */
2564 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2565 return -ENODEV;
2566 }
2567 #ifdef CY_DEBUG_OTHER
2568 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2569 #endif
2570 tty->driver_data = info;
2571 info->tty = tty;
2572 if (serial_paranoia_check(info, tty->name, "cy_open")){
2573 return -ENODEV;
2574 }
2575 #ifdef CY_DEBUG_OPEN
2576 printk("cyc:cy_open ttyC%d, count = %d\n",
2577 info->line, info->count);/**/
2578 #endif
2579 info->count++;
2580 #ifdef CY_DEBUG_COUNT
2581 printk("cyc:cy_open (%d): incrementing count to %d\n",
2582 current->pid, info->count);
2583 #endif
2584 if (!tmp_buf) {
2585 page = get_zeroed_page(GFP_KERNEL);
2586 if (!page)
2587 return -ENOMEM;
2588 if (tmp_buf)
2589 free_page(page);
2590 else
2591 tmp_buf = (unsigned char *) page;
2592 }
2593
2594 /*
2595 * If the port is the middle of closing, bail out now
2596 */
2597 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2598 if (info->flags & ASYNC_CLOSING)
2599 interruptible_sleep_on(&info->close_wait);
2600 return ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
2601 }
2602
2603 /*
2604 * Start up serial port
2605 */
2606 retval = startup(info);
2607 if (retval){
2608 return retval;
2609 }
2610
2611 retval = block_til_ready(tty, filp, info);
2612 if (retval) {
2613 #ifdef CY_DEBUG_OPEN
2614 printk("cyc:cy_open returning after block_til_ready with %d\n",
2615 retval);
2616 #endif
2617 return retval;
2618 }
2619
2620 info->throttle = 0;
2621
2622 #ifdef CY_DEBUG_OPEN
2623 printk(" cyc:cy_open done\n");/**/
2624 #endif
2625
2626 return 0;
2627 } /* cy_open */
2628
2629
2630 /*
2631 * cy_wait_until_sent() --- wait until the transmitter is empty
2632 */
2633 static void
2634 cy_wait_until_sent(struct tty_struct *tty, int timeout)
2635 {
2636 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
2637 void __iomem *base_addr;
2638 int card,chip,channel,index;
2639 unsigned long orig_jiffies;
2640 int char_time;
2641
2642 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2643 return;
2644
2645 if (info->xmit_fifo_size == 0)
2646 return; /* Just in case.... */
2647
2648
2649 orig_jiffies = jiffies;
2650 /*
2651 * Set the check interval to be 1/5 of the estimated time to
2652 * send a single character, and make it at least 1. The check
2653 * interval should also be less than the timeout.
2654 *
2655 * Note: we have to use pretty tight timings here to satisfy
2656 * the NIST-PCTS.
2657 */
2658 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
2659 char_time = char_time / 5;
2660 if (char_time <= 0)
2661 char_time = 1;
2662 if (timeout < 0)
2663 timeout = 0;
2664 if (timeout)
2665 char_time = min(char_time, timeout);
2666 /*
2667 * If the transmitter hasn't cleared in twice the approximate
2668 * amount of time to send the entire FIFO, it probably won't
2669 * ever clear. This assumes the UART isn't doing flow
2670 * control, which is currently the case. Hence, if it ever
2671 * takes longer than info->timeout, this is probably due to a
2672 * UART bug of some kind. So, we clamp the timeout parameter at
2673 * 2*info->timeout.
2674 */
2675 if (!timeout || timeout > 2*info->timeout)
2676 timeout = 2*info->timeout;
2677 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2678 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2679 printk("jiff=%lu...", jiffies);
2680 #endif
2681 card = info->card;
2682 channel = (info->line) - (cy_card[card].first_line);
2683 if (!IS_CYC_Z(cy_card[card])) {
2684 chip = channel>>2;
2685 channel &= 0x03;
2686 index = cy_card[card].bus_index;
2687 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
2688 while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
2689 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2690 printk("Not clean (jiff=%lu)...", jiffies);
2691 #endif
2692 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2693 break;
2694 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2695 break;
2696 }
2697 } else {
2698 // Nothing to do!
2699 }
2700 /* Run one more char cycle */
2701 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2702 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2703 printk("Clean (jiff=%lu)...done\n", jiffies);
2704 #endif
2705 }
2706
2707 /*
2708 * This routine is called when a particular tty device is closed.
2709 */
2710 static void
2711 cy_close(struct tty_struct *tty, struct file *filp)
2712 {
2713 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2714 unsigned long flags;
2715
2716 #ifdef CY_DEBUG_OTHER
2717 printk("cyc:cy_close ttyC%d\n", info->line);
2718 #endif
2719
2720 if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
2721 return;
2722 }
2723
2724 CY_LOCK(info, flags);
2725 /* If the TTY is being hung up, nothing to do */
2726 if (tty_hung_up_p(filp)) {
2727 CY_UNLOCK(info, flags);
2728 return;
2729 }
2730
2731 #ifdef CY_DEBUG_OPEN
2732 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2733 #endif
2734 if ((tty->count == 1) && (info->count != 1)) {
2735 /*
2736 * Uh, oh. tty->count is 1, which means that the tty
2737 * structure will be freed. Info->count should always
2738 * be one in these conditions. If it's greater than
2739 * one, we've got real problems, since it means the
2740 * serial port won't be shutdown.
2741 */
2742 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2743 "info->count is %d\n", info->count);
2744 info->count = 1;
2745 }
2746 #ifdef CY_DEBUG_COUNT
2747 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2748 current->pid, info->count - 1);
2749 #endif
2750 if (--info->count < 0) {
2751 #ifdef CY_DEBUG_COUNT
2752 printk("cyc:cyc_close setting count to 0\n");
2753 #endif
2754 info->count = 0;
2755 }
2756 if (info->count) {
2757 CY_UNLOCK(info, flags);
2758 return;
2759 }
2760 info->flags |= ASYNC_CLOSING;
2761
2762 /*
2763 * Now we wait for the transmit buffer to clear; and we notify
2764 * the line discipline to only process XON/XOFF characters.
2765 */
2766 tty->closing = 1;
2767 CY_UNLOCK(info, flags);
2768 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2769 tty_wait_until_sent(tty, info->closing_wait);
2770 }
2771 CY_LOCK(info, flags);
2772
2773 if (!IS_CYC_Z(cy_card[info->card])) {
2774 int channel = info->line - cy_card[info->card].first_line;
2775 int index = cy_card[info->card].bus_index;
2776 void __iomem *base_addr = cy_card[info->card].base_addr + (cy_chip_offset[channel>>2] << index);
2777 /* Stop accepting input */
2778 channel &= 0x03;
2779 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
2780 cy_writeb(base_addr+(CySRER<<index),
2781 cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
2782 if (info->flags & ASYNC_INITIALIZED) {
2783 /* Waiting for on-board buffers to be empty before closing
2784 the port */
2785 CY_UNLOCK(info, flags);
2786 cy_wait_until_sent(tty, info->timeout);
2787 CY_LOCK(info, flags);
2788 }
2789 } else {
2790 #ifdef Z_WAKE
2791 /* Waiting for on-board buffers to be empty before closing the port */
2792 void __iomem *base_addr = cy_card[info->card].base_addr;
2793 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2794 struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2795 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2796 int channel = info->line - cy_card[info->card].first_line;
2797 int retval;
2798
2799 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2800 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2801 C_CM_IOCTLW, 0L);
2802 if (retval != 0){
2803 printk("cyc:cy_close retval on ttyC%d was %x\n",
2804 info->line, retval);
2805 }
2806 CY_UNLOCK(info, flags);
2807 interruptible_sleep_on(&info->shutdown_wait);
2808 CY_LOCK(info, flags);
2809 }
2810 #endif
2811 }
2812
2813 CY_UNLOCK(info, flags);
2814 shutdown(info);
2815 if (tty->driver->flush_buffer)
2816 tty->driver->flush_buffer(tty);
2817 tty_ldisc_flush(tty);
2818 CY_LOCK(info, flags);
2819
2820 tty->closing = 0;
2821 info->event = 0;
2822 info->tty = NULL;
2823 if (info->blocked_open) {
2824 CY_UNLOCK(info, flags);
2825 if (info->close_delay) {
2826 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2827 }
2828 wake_up_interruptible(&info->open_wait);
2829 CY_LOCK(info, flags);
2830 }
2831 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2832 wake_up_interruptible(&info->close_wait);
2833
2834 #ifdef CY_DEBUG_OTHER
2835 printk(" cyc:cy_close done\n");
2836 #endif
2837
2838 CY_UNLOCK(info, flags);
2839 return;
2840 } /* cy_close */
2841
2842
2843 /* This routine gets called when tty_write has put something into
2844 * the write_queue. The characters may come from user space or
2845 * kernel space.
2846 *
2847 * This routine will return the number of characters actually
2848 * accepted for writing.
2849 *
2850 * If the port is not already transmitting stuff, start it off by
2851 * enabling interrupts. The interrupt service routine will then
2852 * ensure that the characters are sent.
2853 * If the port is already active, there is no need to kick it.
2854 *
2855 */
2856 static int
2857 cy_write(struct tty_struct * tty, const unsigned char *buf, int count)
2858 {
2859 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2860 unsigned long flags;
2861 int c, ret = 0;
2862
2863 #ifdef CY_DEBUG_IO
2864 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2865 #endif
2866
2867 if (serial_paranoia_check(info, tty->name, "cy_write")){
2868 return 0;
2869 }
2870
2871 if (!tty || !info->xmit_buf || !tmp_buf){
2872 return 0;
2873 }
2874
2875 CY_LOCK(info, flags);
2876 while (1) {
2877 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2878 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2879
2880 if (c <= 0)
2881 break;
2882
2883 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2884 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
2885 info->xmit_cnt += c;
2886 buf += c;
2887 count -= c;
2888 ret += c;
2889 }
2890 CY_UNLOCK(info, flags);
2891
2892 info->idle_stats.xmit_bytes += ret;
2893 info->idle_stats.xmit_idle = jiffies;
2894
2895 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2896 start_xmit(info);
2897 }
2898 return ret;
2899 } /* cy_write */
2900
2901
2902 /*
2903 * This routine is called by the kernel to write a single
2904 * character to the tty device. If the kernel uses this routine,
2905 * it must call the flush_chars() routine (if defined) when it is
2906 * done stuffing characters into the driver. If there is no room
2907 * in the queue, the character is ignored.
2908 */
2909 static void
2910 cy_put_char(struct tty_struct *tty, unsigned char ch)
2911 {
2912 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2913 unsigned long flags;
2914
2915 #ifdef CY_DEBUG_IO
2916 printk("cyc:cy_put_char ttyC%d\n", info->line);
2917 #endif
2918
2919 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2920 return;
2921
2922 if (!tty || !info->xmit_buf)
2923 return;
2924
2925 CY_LOCK(info, flags);
2926 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2927 CY_UNLOCK(info, flags);
2928 return;
2929 }
2930
2931 info->xmit_buf[info->xmit_head++] = ch;
2932 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2933 info->xmit_cnt++;
2934 info->idle_stats.xmit_bytes++;
2935 info->idle_stats.xmit_idle = jiffies;
2936 CY_UNLOCK(info, flags);
2937 } /* cy_put_char */
2938
2939
2940 /*
2941 * This routine is called by the kernel after it has written a
2942 * series of characters to the tty device using put_char().
2943 */
2944 static void
2945 cy_flush_chars(struct tty_struct *tty)
2946 {
2947 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2948
2949 #ifdef CY_DEBUG_IO
2950 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2951 #endif
2952
2953 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2954 return;
2955
2956 if (info->xmit_cnt <= 0 || tty->stopped
2957 || tty->hw_stopped || !info->xmit_buf)
2958 return;
2959
2960 start_xmit(info);
2961 } /* cy_flush_chars */
2962
2963
2964 /*
2965 * This routine returns the numbers of characters the tty driver
2966 * will accept for queuing to be written. This number is subject
2967 * to change as output buffers get emptied, or if the output flow
2968 * control is activated.
2969 */
2970 static int
2971 cy_write_room(struct tty_struct *tty)
2972 {
2973 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2974 int ret;
2975
2976 #ifdef CY_DEBUG_IO
2977 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2978 #endif
2979
2980 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2981 return 0;
2982 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2983 if (ret < 0)
2984 ret = 0;
2985 return ret;
2986 } /* cy_write_room */
2987
2988
2989 static int
2990 cy_chars_in_buffer(struct tty_struct *tty)
2991 {
2992 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2993 int card, channel;
2994
2995 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2996 return 0;
2997
2998 card = info->card;
2999 channel = (info->line) - (cy_card[card].first_line);
3000
3001 #ifdef Z_EXT_CHARS_IN_BUFFER
3002 if (!IS_CYC_Z(cy_card[card])) {
3003 #endif /* Z_EXT_CHARS_IN_BUFFER */
3004 #ifdef CY_DEBUG_IO
3005 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
3006 info->line, info->xmit_cnt); /* */
3007 #endif
3008 return info->xmit_cnt;
3009 #ifdef Z_EXT_CHARS_IN_BUFFER
3010 } else {
3011 static volatile struct FIRM_ID *firm_id;
3012 static volatile struct ZFW_CTRL *zfw_ctrl;
3013 static volatile struct CH_CTRL *ch_ctrl;
3014 static volatile struct BUF_CTRL *buf_ctrl;
3015 int char_count;
3016 volatile uclong tx_put, tx_get, tx_bufsize;
3017
3018 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3019 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3020 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3021 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3022
3023 tx_get = cy_readl(&buf_ctrl->tx_get);
3024 tx_put = cy_readl(&buf_ctrl->tx_put);
3025 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3026 if (tx_put >= tx_get)
3027 char_count = tx_put - tx_get;
3028 else
3029 char_count = tx_put - tx_get + tx_bufsize;
3030 #ifdef CY_DEBUG_IO
3031 printk("cyc:cy_chars_in_buffer ttyC%d %d\n",
3032 info->line, info->xmit_cnt + char_count); /* */
3033 #endif
3034 return (info->xmit_cnt + char_count);
3035 }
3036 #endif /* Z_EXT_CHARS_IN_BUFFER */
3037 } /* cy_chars_in_buffer */
3038
3039
3040 /*
3041 * ------------------------------------------------------------
3042 * cy_ioctl() and friends
3043 * ------------------------------------------------------------
3044 */
3045
3046 static void
3047 cyy_baud_calc(struct cyclades_port *info, uclong baud)
3048 {
3049 int co, co_val, bpr;
3050 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000);
3051
3052 if (baud == 0) {
3053 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3054 return;
3055 }
3056
3057 /* determine which prescaler to use */
3058 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3059 if (cy_clock / co_val / baud > 63)
3060 break;
3061 }
3062
3063 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3064 if (bpr > 255)
3065 bpr = 255;
3066
3067 info->tbpr = info->rbpr = bpr;
3068 info->tco = info->rco = co;
3069 }
3070
3071 /*
3072 * This routine finds or computes the various line characteristics.
3073 * It used to be called config_setup
3074 */
3075 static void
3076 set_line_char(struct cyclades_port * info)
3077 {
3078 unsigned long flags;
3079 void __iomem *base_addr;
3080 int card,chip,channel,index;
3081 unsigned cflag, iflag;
3082 unsigned short chip_number;
3083 int baud, baud_rate = 0;
3084 int i;
3085
3086
3087 if (!info->tty || !info->tty->termios){
3088 return;
3089 }
3090 if (info->line == -1){
3091 return;
3092 }
3093 cflag = info->tty->termios->c_cflag;
3094 iflag = info->tty->termios->c_iflag;
3095
3096 /*
3097 * Set up the tty->alt_speed kludge
3098 */
3099 if (info->tty) {
3100 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3101 info->tty->alt_speed = 57600;
3102 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3103 info->tty->alt_speed = 115200;
3104 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3105 info->tty->alt_speed = 230400;
3106 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3107 info->tty->alt_speed = 460800;
3108 }
3109
3110 card = info->card;
3111 channel = (info->line) - (cy_card[card].first_line);
3112 chip_number = channel / 4;
3113
3114 if (!IS_CYC_Z(cy_card[card])) {
3115
3116 index = cy_card[card].bus_index;
3117
3118 /* baud rate */
3119 baud = tty_get_baud_rate(info->tty);
3120 if ((baud == 38400) &&
3121 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3122 if (info->custom_divisor)
3123 baud_rate = info->baud / info->custom_divisor;
3124 else
3125 baud_rate = info->baud;
3126 } else if (baud > CD1400_MAX_SPEED) {
3127 baud = CD1400_MAX_SPEED;
3128 }
3129 /* find the baud index */
3130 for (i = 0; i < 20; i++) {
3131 if (baud == baud_table[i]) {
3132 break;
3133 }
3134 }
3135 if (i == 20) {
3136 i = 19; /* CD1400_MAX_SPEED */
3137 }
3138
3139 if ((baud == 38400) &&
3140 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3141 cyy_baud_calc(info, baud_rate);
3142 } else {
3143 if(info->chip_rev >= CD1400_REV_J) {
3144 /* It is a CD1400 rev. J or later */
3145 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3146 info->tco = baud_co_60[i]; /* Tx CO */
3147 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3148 info->rco = baud_co_60[i]; /* Rx CO */
3149 } else {
3150 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3151 info->tco = baud_co_25[i]; /* Tx CO */
3152 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3153 info->rco = baud_co_25[i]; /* Rx CO */
3154 }
3155 }
3156 if (baud_table[i] == 134) {
3157 /* get it right for 134.5 baud */
3158 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3159 } else if ((baud == 38400) &&
3160 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3161 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3162 } else if (baud_table[i]) {
3163 info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
3164 /* this needs to be propagated into the card info */
3165 } else {
3166 info->timeout = 0;
3167 }
3168 /* By tradition (is it a standard?) a baud rate of zero
3169 implies the line should be/has been closed. A bit
3170 later in this routine such a test is performed. */
3171
3172 /* byte size and parity */
3173 info->cor5 = 0;
3174 info->cor4 = 0;
3175 info->cor3 = (info->default_threshold
3176 ? info->default_threshold
3177 : baud_cor3[i]); /* receive threshold */
3178 info->cor2 = CyETC;
3179 switch(cflag & CSIZE){
3180 case CS5:
3181 info->cor1 = Cy_5_BITS;
3182 break;
3183 case CS6:
3184 info->cor1 = Cy_6_BITS;
3185 break;
3186 case CS7:
3187 info->cor1 = Cy_7_BITS;
3188 break;
3189 case CS8:
3190 info->cor1 = Cy_8_BITS;
3191 break;
3192 }
3193 if(cflag & CSTOPB){
3194 info->cor1 |= Cy_2_STOP;
3195 }
3196 if (cflag & PARENB){
3197 if (cflag & PARODD){
3198 info->cor1 |= CyPARITY_O;
3199 }else{
3200 info->cor1 |= CyPARITY_E;
3201 }
3202 }else{
3203 info->cor1 |= CyPARITY_NONE;
3204 }
3205
3206 /* CTS flow control flag */
3207 if (cflag & CRTSCTS){
3208 info->flags |= ASYNC_CTS_FLOW;
3209 info->cor2 |= CyCtsAE;
3210 }else{
3211 info->flags &= ~ASYNC_CTS_FLOW;
3212 info->cor2 &= ~CyCtsAE;
3213 }
3214 if (cflag & CLOCAL)
3215 info->flags &= ~ASYNC_CHECK_CD;
3216 else
3217 info->flags |= ASYNC_CHECK_CD;
3218
3219 /***********************************************
3220 The hardware option, CyRtsAO, presents RTS when
3221 the chip has characters to send. Since most modems
3222 use RTS as reverse (inbound) flow control, this
3223 option is not used. If inbound flow control is
3224 necessary, DTR can be programmed to provide the
3225 appropriate signals for use with a non-standard
3226 cable. Contact Marcio Saito for details.
3227 ***********************************************/
3228
3229 chip = channel>>2;
3230 channel &= 0x03;
3231 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3232
3233 CY_LOCK(info, flags);
3234 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3235
3236 /* tx and rx baud rate */
3237
3238 cy_writeb(base_addr+(CyTCOR<<index), info->tco);
3239 cy_writeb(base_addr+(CyTBPR<<index), info->tbpr);
3240 cy_writeb(base_addr+(CyRCOR<<index), info->rco);
3241 cy_writeb(base_addr+(CyRBPR<<index), info->rbpr);
3242
3243 /* set line characteristics according configuration */
3244
3245 cy_writeb(base_addr+(CySCHR1<<index),
3246 START_CHAR(info->tty));
3247 cy_writeb(base_addr+(CySCHR2<<index),
3248 STOP_CHAR(info->tty));
3249 cy_writeb(base_addr+(CyCOR1<<index), info->cor1);
3250 cy_writeb(base_addr+(CyCOR2<<index), info->cor2);
3251 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3252 cy_writeb(base_addr+(CyCOR4<<index), info->cor4);
3253 cy_writeb(base_addr+(CyCOR5<<index), info->cor5);
3254
3255 cyy_issue_cmd(base_addr,
3256 CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index);
3257
3258 cy_writeb(base_addr+(CyCAR<<index),
3259 (u_char)channel); /* !!! Is this needed? */
3260 cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
3261 ? info->default_timeout
3262 : 0x02)); /* 10ms rx timeout */
3263
3264 if (C_CLOCAL(info->tty)) {
3265 /* without modem intr */
3266 cy_writeb(base_addr+(CySRER<<index),
3267 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3268 /* act on 1->0 modem transitions */
3269 if ((cflag & CRTSCTS) && info->rflow) {
3270 cy_writeb(base_addr+(CyMCOR1<<index),
3271 (CyCTS|rflow_thr[i]));
3272 } else {
3273 cy_writeb(base_addr+(CyMCOR1<<index), CyCTS);
3274 }
3275 /* act on 0->1 modem transitions */
3276 cy_writeb(base_addr+(CyMCOR2<<index), CyCTS);
3277 } else {
3278 /* without modem intr */
3279 cy_writeb(base_addr+(CySRER<<index),
3280 cy_readb(base_addr+(CySRER<<index)) | CyMdmCh);
3281 /* act on 1->0 modem transitions */
3282 if ((cflag & CRTSCTS) && info->rflow) {
3283 cy_writeb(base_addr+(CyMCOR1<<index),
3284 (CyDSR|CyCTS|CyRI|CyDCD|rflow_thr[i]));
3285 } else {
3286 cy_writeb(base_addr+(CyMCOR1<<index),
3287 CyDSR|CyCTS|CyRI|CyDCD);
3288 }
3289 /* act on 0->1 modem transitions */
3290 cy_writeb(base_addr+(CyMCOR2<<index),
3291 CyDSR|CyCTS|CyRI|CyDCD);
3292 }
3293
3294 if(i == 0){ /* baud rate is zero, turn off line */
3295 if (info->rtsdtr_inv) {
3296 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3297 } else {
3298 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3299 }
3300 #ifdef CY_DEBUG_DTR
3301 printk("cyc:set_line_char dropping DTR\n");
3302 printk(" status: 0x%x, 0x%x\n",
3303 cy_readb(base_addr+(CyMSVR1<<index)),
3304 cy_readb(base_addr+(CyMSVR2<<index)));
3305 #endif
3306 }else{
3307 if (info->rtsdtr_inv) {
3308 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3309 } else {
3310 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3311 }
3312 #ifdef CY_DEBUG_DTR
3313 printk("cyc:set_line_char raising DTR\n");
3314 printk(" status: 0x%x, 0x%x\n",
3315 cy_readb(base_addr+(CyMSVR1<<index)),
3316 cy_readb(base_addr+(CyMSVR2<<index)));
3317 #endif
3318 }
3319
3320 if (info->tty){
3321 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3322 }
3323 CY_UNLOCK(info, flags);
3324
3325 } else {
3326 struct FIRM_ID __iomem *firm_id;
3327 struct ZFW_CTRL __iomem *zfw_ctrl;
3328 struct BOARD_CTRL __iomem *board_ctrl;
3329 struct CH_CTRL __iomem *ch_ctrl;
3330 struct BUF_CTRL __iomem *buf_ctrl;
3331 uclong sw_flow;
3332 int retval;
3333
3334 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3335 if (!ISZLOADED(cy_card[card])) {
3336 return;
3337 }
3338
3339 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3340 board_ctrl = &zfw_ctrl->board_ctrl;
3341 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3342 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3343
3344 /* baud rate */
3345 baud = tty_get_baud_rate(info->tty);
3346 if ((baud == 38400) &&
3347 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3348 if (info->custom_divisor)
3349 baud_rate = info->baud / info->custom_divisor;
3350 else
3351 baud_rate = info->baud;
3352 } else if (baud > CYZ_MAX_SPEED) {
3353 baud = CYZ_MAX_SPEED;
3354 }
3355 cy_writel(&ch_ctrl->comm_baud , baud);
3356
3357 if (baud == 134) {
3358 /* get it right for 134.5 baud */
3359 info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
3360 } else if ((baud == 38400) &&
3361 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
3362 info->timeout = (info->xmit_fifo_size*HZ*15/baud_rate) + 2;
3363 } else if (baud) {
3364 info->timeout = (info->xmit_fifo_size*HZ*15/baud) + 2;
3365 /* this needs to be propagated into the card info */
3366 } else {
3367 info->timeout = 0;
3368 }
3369
3370 /* byte size and parity */
3371 switch(cflag & CSIZE){
3372 case CS5: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS5); break;
3373 case CS6: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS6); break;
3374 case CS7: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS7); break;
3375 case CS8: cy_writel(&ch_ctrl->comm_data_l , C_DL_CS8); break;
3376 }
3377 if(cflag & CSTOPB){
3378 cy_writel(&ch_ctrl->comm_data_l,
3379 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3380 }else{
3381 cy_writel(&ch_ctrl->comm_data_l,
3382 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3383 }
3384 if (cflag & PARENB){
3385 if (cflag & PARODD){
3386 cy_writel(&ch_ctrl->comm_parity , C_PR_ODD);
3387 }else{
3388 cy_writel(&ch_ctrl->comm_parity , C_PR_EVEN);
3389 }
3390 }else{
3391 cy_writel(&ch_ctrl->comm_parity , C_PR_NONE);
3392 }
3393
3394 /* CTS flow control flag */
3395 if (cflag & CRTSCTS){
3396 cy_writel(&ch_ctrl->hw_flow,
3397 cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3398 }else{
3399 cy_writel(&ch_ctrl->hw_flow,
3400 cy_readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3401 }
3402 /* As the HW flow control is done in firmware, the driver doesn't
3403 need to care about it */
3404 info->flags &= ~ASYNC_CTS_FLOW;
3405
3406 /* XON/XOFF/XANY flow control flags */
3407 sw_flow = 0;
3408 if (iflag & IXON){
3409 sw_flow |= C_FL_OXX;
3410 if (iflag & IXANY)
3411 sw_flow |= C_FL_OIXANY;
3412 }
3413 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3414
3415 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3416 if (retval != 0){
3417 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3418 info->line, retval);
3419 }
3420
3421 /* CD sensitivity */
3422 if (cflag & CLOCAL){
3423 info->flags &= ~ASYNC_CHECK_CD;
3424 }else{
3425 info->flags |= ASYNC_CHECK_CD;
3426 }
3427
3428 if(baud == 0){ /* baud rate is zero, turn off line */
3429 cy_writel(&ch_ctrl->rs_control,
3430 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3431 #ifdef CY_DEBUG_DTR
3432 printk("cyc:set_line_char dropping Z DTR\n");
3433 #endif
3434 }else{
3435 cy_writel(&ch_ctrl->rs_control,
3436 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3437 #ifdef CY_DEBUG_DTR
3438 printk("cyc:set_line_char raising Z DTR\n");
3439 #endif
3440 }
3441
3442 retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
3443 if (retval != 0){
3444 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3445 info->line, retval);
3446 }
3447
3448 if (info->tty){
3449 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3450 }
3451 }
3452 } /* set_line_char */
3453
3454
3455 static int
3456 get_serial_info(struct cyclades_port * info,
3457 struct serial_struct __user * retinfo)
3458 {
3459 struct serial_struct tmp;
3460 struct cyclades_card *cinfo = &cy_card[info->card];
3461
3462 if (!retinfo)
3463 return -EFAULT;
3464 memset(&tmp, 0, sizeof(tmp));
3465 tmp.type = info->type;
3466 tmp.line = info->line;
3467 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3468 tmp.irq = cinfo->irq;
3469 tmp.flags = info->flags;
3470 tmp.close_delay = info->close_delay;
3471 tmp.baud_base = info->baud;
3472 tmp.custom_divisor = info->custom_divisor;
3473 tmp.hub6 = 0; /*!!!*/
3474 return copy_to_user(retinfo,&tmp,sizeof(*retinfo))?-EFAULT:0;
3475 } /* get_serial_info */
3476
3477
3478 static int
3479 set_serial_info(struct cyclades_port * info,
3480 struct serial_struct __user * new_info)
3481 {
3482 struct serial_struct new_serial;
3483 struct cyclades_port old_info;
3484
3485 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
3486 return -EFAULT;
3487 old_info = *info;
3488
3489 if (!capable(CAP_SYS_ADMIN)) {
3490 if ((new_serial.close_delay != info->close_delay) ||
3491 (new_serial.baud_base != info->baud) ||
3492 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
3493 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
3494 return -EPERM;
3495 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
3496 (new_serial.flags & ASYNC_USR_MASK));
3497 info->baud = new_serial.baud_base;
3498 info->custom_divisor = new_serial.custom_divisor;
3499 goto check_and_exit;
3500 }
3501
3502
3503 /*
3504 * OK, past this point, all the error checking has been done.
3505 * At this point, we start making changes.....
3506 */
3507
3508 info->baud = new_serial.baud_base;
3509 info->custom_divisor = new_serial.custom_divisor;
3510 info->flags = ((info->flags & ~ASYNC_FLAGS) |
3511 (new_serial.flags & ASYNC_FLAGS));
3512 info->close_delay = new_serial.close_delay * HZ/100;
3513 info->closing_wait = new_serial.closing_wait * HZ/100;
3514
3515 check_and_exit:
3516 if (info->flags & ASYNC_INITIALIZED){
3517 set_line_char(info);
3518 return 0;
3519 }else{
3520 return startup(info);
3521 }
3522 } /* set_serial_info */
3523
3524 /*
3525 * get_lsr_info - get line status register info
3526 *
3527 * Purpose: Let user call ioctl() to get info when the UART physically
3528 * is emptied. On bus types like RS485, the transmitter must
3529 * release the bus after transmitting. This must be done when
3530 * the transmit shift register is empty, not be done when the
3531 * transmit holding register is empty. This functionality
3532 * allows an RS485 driver to be written in user space.
3533 */
3534 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3535 {
3536 int card, chip, channel, index;
3537 unsigned char status;
3538 unsigned int result;
3539 unsigned long flags;
3540 void __iomem *base_addr;
3541
3542 card = info->card;
3543 channel = (info->line) - (cy_card[card].first_line);
3544 if (!IS_CYC_Z(cy_card[card])) {
3545 chip = channel>>2;
3546 channel &= 0x03;
3547 index = cy_card[card].bus_index;
3548 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3549
3550 CY_LOCK(info, flags);
3551 status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
3552 CY_UNLOCK(info, flags);
3553 result = (status ? 0 : TIOCSER_TEMT);
3554 } else {
3555 /* Not supported yet */
3556 return -EINVAL;
3557 }
3558 return put_user(result, (unsigned long __user *) value);
3559 }
3560
3561 static int
3562 cy_tiocmget(struct tty_struct *tty, struct file *file)
3563 {
3564 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3565 int card,chip,channel,index;
3566 void __iomem *base_addr;
3567 unsigned long flags;
3568 unsigned char status;
3569 unsigned long lstatus;
3570 unsigned int result;
3571 struct FIRM_ID __iomem *firm_id;
3572 struct ZFW_CTRL __iomem *zfw_ctrl;
3573 struct BOARD_CTRL __iomem *board_ctrl;
3574 struct CH_CTRL __iomem *ch_ctrl;
3575
3576 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3577 return -ENODEV;
3578
3579 card = info->card;
3580 channel = (info->line) - (cy_card[card].first_line);
3581 if (!IS_CYC_Z(cy_card[card])) {
3582 chip = channel>>2;
3583 channel &= 0x03;
3584 index = cy_card[card].bus_index;
3585 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3586
3587 CY_LOCK(info, flags);
3588 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3589 status = cy_readb(base_addr+(CyMSVR1<<index));
3590 status |= cy_readb(base_addr+(CyMSVR2<<index));
3591 CY_UNLOCK(info, flags);
3592
3593 if (info->rtsdtr_inv) {
3594 result = ((status & CyRTS) ? TIOCM_DTR : 0)
3595 | ((status & CyDTR) ? TIOCM_RTS : 0);
3596 } else {
3597 result = ((status & CyRTS) ? TIOCM_RTS : 0)
3598 | ((status & CyDTR) ? TIOCM_DTR : 0);
3599 }
3600 result |= ((status & CyDCD) ? TIOCM_CAR : 0)
3601 | ((status & CyRI) ? TIOCM_RNG : 0)
3602 | ((status & CyDSR) ? TIOCM_DSR : 0)
3603 | ((status & CyCTS) ? TIOCM_CTS : 0);
3604 } else {
3605 base_addr = cy_card[card].base_addr;
3606
3607 if (cy_card[card].num_chips != -1){
3608 return -EINVAL;
3609 }
3610
3611 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3612 if (ISZLOADED(cy_card[card])) {
3613 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3614 board_ctrl = &zfw_ctrl->board_ctrl;
3615 ch_ctrl = zfw_ctrl->ch_ctrl;
3616 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3617 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0)
3618 | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0)
3619 | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0)
3620 | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0)
3621 | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0)
3622 | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3623 }else{
3624 result = 0;
3625 return -ENODEV;
3626 }
3627
3628 }
3629 return result;
3630 } /* cy_tiomget */
3631
3632
3633 static int
3634 cy_tiocmset(struct tty_struct *tty, struct file *file,
3635 unsigned int set, unsigned int clear)
3636 {
3637 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3638 int card,chip,channel,index;
3639 void __iomem *base_addr;
3640 unsigned long flags;
3641 struct FIRM_ID __iomem *firm_id;
3642 struct ZFW_CTRL __iomem *zfw_ctrl;
3643 struct BOARD_CTRL __iomem *board_ctrl;
3644 struct CH_CTRL __iomem *ch_ctrl;
3645 int retval;
3646
3647 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3648 return -ENODEV;
3649
3650 card = info->card;
3651 channel = (info->line) - (cy_card[card].first_line);
3652 if (!IS_CYC_Z(cy_card[card])) {
3653 chip = channel>>2;
3654 channel &= 0x03;
3655 index = cy_card[card].bus_index;
3656 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3657
3658 if (set & TIOCM_RTS){
3659 CY_LOCK(info, flags);
3660 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3661 if (info->rtsdtr_inv) {
3662 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3663 } else {
3664 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3665 }
3666 CY_UNLOCK(info, flags);
3667 }
3668 if (clear & TIOCM_RTS) {
3669 CY_LOCK(info, flags);
3670 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3671 if (info->rtsdtr_inv) {
3672 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3673 } else {
3674 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3675 }
3676 CY_UNLOCK(info, flags);
3677 }
3678 if (set & TIOCM_DTR){
3679 CY_LOCK(info, flags);
3680 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3681 if (info->rtsdtr_inv) {
3682 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
3683 } else {
3684 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
3685 }
3686 #ifdef CY_DEBUG_DTR
3687 printk("cyc:set_modem_info raising DTR\n");
3688 printk(" status: 0x%x, 0x%x\n",
3689 cy_readb(base_addr+(CyMSVR1<<index)),
3690 cy_readb(base_addr+(CyMSVR2<<index)));
3691 #endif
3692 CY_UNLOCK(info, flags);
3693 }
3694 if (clear & TIOCM_DTR) {
3695 CY_LOCK(info, flags);
3696 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
3697 if (info->rtsdtr_inv) {
3698 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
3699 } else {
3700 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
3701 }
3702
3703 #ifdef CY_DEBUG_DTR
3704 printk("cyc:set_modem_info dropping DTR\n");
3705 printk(" status: 0x%x, 0x%x\n",
3706 cy_readb(base_addr+(CyMSVR1<<index)),
3707 cy_readb(base_addr+(CyMSVR2<<index)));
3708 #endif
3709 CY_UNLOCK(info, flags);
3710 }
3711 } else {
3712 base_addr = cy_card[card].base_addr;
3713
3714 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3715 if (ISZLOADED(cy_card[card])) {
3716 zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3717 board_ctrl = &zfw_ctrl->board_ctrl;
3718 ch_ctrl = zfw_ctrl->ch_ctrl;
3719
3720 if (set & TIOCM_RTS){
3721 CY_LOCK(info, flags);
3722 cy_writel(&ch_ctrl[channel].rs_control,
3723 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
3724 CY_UNLOCK(info, flags);
3725 }
3726 if (clear & TIOCM_RTS) {
3727 CY_LOCK(info, flags);
3728 cy_writel(&ch_ctrl[channel].rs_control,
3729 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
3730 CY_UNLOCK(info, flags);
3731 }
3732 if (set & TIOCM_DTR){
3733 CY_LOCK(info, flags);
3734 cy_writel(&ch_ctrl[channel].rs_control,
3735 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
3736 #ifdef CY_DEBUG_DTR
3737 printk("cyc:set_modem_info raising Z DTR\n");
3738 #endif
3739 CY_UNLOCK(info, flags);
3740 }
3741 if (clear & TIOCM_DTR) {
3742 CY_LOCK(info, flags);
3743 cy_writel(&ch_ctrl[channel].rs_control,
3744 cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
3745 #ifdef CY_DEBUG_DTR
3746 printk("cyc:set_modem_info clearing Z DTR\n");
3747 #endif
3748 CY_UNLOCK(info, flags);
3749 }
3750 }else{
3751 return -ENODEV;
3752 }
3753 CY_LOCK(info, flags);
3754 retval = cyz_issue_cmd(&cy_card[info->card],
3755 channel, C_CM_IOCTLM,0L);
3756 if (retval != 0){
3757 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3758 info->line, retval);
3759 }
3760 CY_UNLOCK(info, flags);
3761 }
3762 return 0;
3763 } /* cy_tiocmset */
3764
3765 /*
3766 * cy_break() --- routine which turns the break handling on or off
3767 */
3768 static void
3769 cy_break(struct tty_struct *tty, int break_state)
3770 {
3771 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3772 unsigned long flags;
3773
3774 if (serial_paranoia_check(info, tty->name, "cy_break"))
3775 return;
3776
3777 CY_LOCK(info, flags);
3778 if (!IS_CYC_Z(cy_card[info->card])) {
3779 /* Let the transmit ISR take care of this (since it
3780 requires stuffing characters into the output stream).
3781 */
3782 if (break_state == -1) {
3783 if (!info->breakon) {
3784 info->breakon = 1;
3785 if (!info->xmit_cnt) {
3786 CY_UNLOCK(info, flags);
3787 start_xmit(info);
3788 CY_LOCK(info, flags);
3789 }
3790 }
3791 } else {
3792 if (!info->breakoff) {
3793 info->breakoff = 1;
3794 if (!info->xmit_cnt) {
3795 CY_UNLOCK(info, flags);
3796 start_xmit(info);
3797 CY_LOCK(info, flags);
3798 }
3799 }
3800 }
3801 } else {
3802 int retval;
3803
3804 if (break_state == -1) {
3805 retval = cyz_issue_cmd(&cy_card[info->card],
3806 (info->line) - (cy_card[info->card].first_line),
3807 C_CM_SET_BREAK, 0L);
3808 if (retval != 0) {
3809 printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
3810 info->line, retval);
3811 }
3812 } else {
3813 retval = cyz_issue_cmd(&cy_card[info->card],
3814 (info->line) - (cy_card[info->card].first_line),
3815 C_CM_CLR_BREAK, 0L);
3816 if (retval != 0) {
3817 printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
3818 info->line, retval);
3819 }
3820 }
3821 }
3822 CY_UNLOCK(info, flags);
3823 } /* cy_break */
3824
3825 static int
3826 get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon)
3827 {
3828
3829 if(copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3830 return -EFAULT;
3831 info->mon.int_count = 0;
3832 info->mon.char_count = 0;
3833 info->mon.char_max = 0;
3834 info->mon.char_last = 0;
3835 return 0;
3836 }/* get_mon_info */
3837
3838
3839 static int
3840 set_threshold(struct cyclades_port * info, unsigned long value)
3841 {
3842 void __iomem *base_addr;
3843 int card,channel,chip,index;
3844 unsigned long flags;
3845
3846 card = info->card;
3847 channel = info->line - cy_card[card].first_line;
3848 if (!IS_CYC_Z(cy_card[card])) {
3849 chip = channel>>2;
3850 channel &= 0x03;
3851 index = cy_card[card].bus_index;
3852 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3853
3854 info->cor3 &= ~CyREC_FIFO;
3855 info->cor3 |= value & CyREC_FIFO;
3856
3857 CY_LOCK(info, flags);
3858 cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
3859 cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
3860 CY_UNLOCK(info, flags);
3861 } else {
3862 // Nothing to do!
3863 }
3864 return 0;
3865 }/* set_threshold */
3866
3867
3868 static int
3869 get_threshold(struct cyclades_port * info, unsigned long __user *value)
3870 {
3871 void __iomem *base_addr;
3872 int card,channel,chip,index;
3873 unsigned long tmp;
3874
3875 card = info->card;
3876 channel = info->line - cy_card[card].first_line;
3877 if (!IS_CYC_Z(cy_card[card])) {
3878 chip = channel>>2;
3879 channel &= 0x03;
3880 index = cy_card[card].bus_index;
3881 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3882
3883 tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
3884 return put_user(tmp,value);
3885 } else {
3886 // Nothing to do!
3887 return 0;
3888 }
3889 }/* get_threshold */
3890
3891
3892 static int
3893 set_default_threshold(struct cyclades_port * info, unsigned long value)
3894 {
3895 info->default_threshold = value & 0x0f;
3896 return 0;
3897 }/* set_default_threshold */
3898
3899
3900 static int
3901 get_default_threshold(struct cyclades_port * info, unsigned long __user *value)
3902 {
3903 return put_user(info->default_threshold,value);
3904 }/* get_default_threshold */
3905
3906
3907 static int
3908 set_timeout(struct cyclades_port * info, unsigned long value)
3909 {
3910 void __iomem *base_addr;
3911 int card,channel,chip,index;
3912 unsigned long flags;
3913
3914 card = info->card;
3915 channel = info->line - cy_card[card].first_line;
3916 if (!IS_CYC_Z(cy_card[card])) {
3917 chip = channel>>2;
3918 channel &= 0x03;
3919 index = cy_card[card].bus_index;
3920 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3921
3922 CY_LOCK(info, flags);
3923 cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
3924 CY_UNLOCK(info, flags);
3925 } else {
3926 // Nothing to do!
3927 }
3928 return 0;
3929 }/* set_timeout */
3930
3931
3932 static int
3933 get_timeout(struct cyclades_port * info, unsigned long __user *value)
3934 {
3935 void __iomem *base_addr;
3936 int card,channel,chip,index;
3937 unsigned long tmp;
3938
3939 card = info->card;
3940 channel = info->line - cy_card[card].first_line;
3941 if (!IS_CYC_Z(cy_card[card])) {
3942 chip = channel>>2;
3943 channel &= 0x03;
3944 index = cy_card[card].bus_index;
3945 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
3946
3947 tmp = cy_readb(base_addr+(CyRTPR<<index));
3948 return put_user(tmp,value);
3949 } else {
3950 // Nothing to do!
3951 return 0;
3952 }
3953 }/* get_timeout */
3954
3955
3956 static int
3957 set_default_timeout(struct cyclades_port * info, unsigned long value)
3958 {
3959 info->default_timeout = value & 0xff;
3960 return 0;
3961 }/* set_default_timeout */
3962
3963
3964 static int
3965 get_default_timeout(struct cyclades_port * info, unsigned long __user *value)
3966 {
3967 return put_user(info->default_timeout,value);
3968 }/* get_default_timeout */
3969
3970 /*
3971 * This routine allows the tty driver to implement device-
3972 * specific ioctl's. If the ioctl number passed in cmd is
3973 * not recognized by the driver, it should return ENOIOCTLCMD.
3974 */
3975 static int
3976 cy_ioctl(struct tty_struct *tty, struct file * file,
3977 unsigned int cmd, unsigned long arg)
3978 {
3979 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
3980 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3981 struct serial_icounter_struct __user *p_cuser; /* user space */
3982 int ret_val = 0;
3983 unsigned long flags;
3984 void __user *argp = (void __user *)arg;
3985
3986 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3987 return -ENODEV;
3988
3989 #ifdef CY_DEBUG_OTHER
3990 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3991 info->line, cmd, arg); /* */
3992 #endif
3993
3994 switch (cmd) {
3995 case CYGETMON:
3996 ret_val = get_mon_info(info, argp);
3997 break;
3998 case CYGETTHRESH:
3999 ret_val = get_threshold(info, argp);
4000 break;
4001 case CYSETTHRESH:
4002 ret_val = set_threshold(info, arg);
4003 break;
4004 case CYGETDEFTHRESH:
4005 ret_val = get_default_threshold(info, argp);
4006 break;
4007 case CYSETDEFTHRESH:
4008 ret_val = set_default_threshold(info, arg);
4009 break;
4010 case CYGETTIMEOUT:
4011 ret_val = get_timeout(info, argp);
4012 break;
4013 case CYSETTIMEOUT:
4014 ret_val = set_timeout(info, arg);
4015 break;
4016 case CYGETDEFTIMEOUT:
4017 ret_val = get_default_timeout(info, argp);
4018 break;
4019 case CYSETDEFTIMEOUT:
4020 ret_val = set_default_timeout(info, arg);
4021 break;
4022 case CYSETRFLOW:
4023 info->rflow = (int)arg;
4024 ret_val = 0;
4025 break;
4026 case CYGETRFLOW:
4027 ret_val = info->rflow;
4028 break;
4029 case CYSETRTSDTR_INV:
4030 info->rtsdtr_inv = (int)arg;
4031 ret_val = 0;
4032 break;
4033 case CYGETRTSDTR_INV:
4034 ret_val = info->rtsdtr_inv;
4035 break;
4036 case CYGETCARDINFO:
4037 if (copy_to_user(argp, &cy_card[info->card],
4038 sizeof (struct cyclades_card))) {
4039 ret_val = -EFAULT;
4040 break;
4041 }
4042 ret_val = 0;
4043 break;
4044 case CYGETCD1400VER:
4045 ret_val = info->chip_rev;
4046 break;
4047 #ifndef CONFIG_CYZ_INTR
4048 case CYZSETPOLLCYCLE:
4049 cyz_polling_cycle = (arg * HZ) / 1000;
4050 ret_val = 0;
4051 break;
4052 case CYZGETPOLLCYCLE:
4053 ret_val = (cyz_polling_cycle * 1000) / HZ;
4054 break;
4055 #endif /* CONFIG_CYZ_INTR */
4056 case CYSETWAIT:
4057 info->closing_wait = (unsigned short)arg * HZ/100;
4058 ret_val = 0;
4059 break;
4060 case CYGETWAIT:
4061 ret_val = info->closing_wait / (HZ/100);
4062 break;
4063 case TIOCGSERIAL:
4064 ret_val = get_serial_info(info, argp);
4065 break;
4066 case TIOCSSERIAL:
4067 ret_val = set_serial_info(info, argp);
4068 break;
4069 case TIOCSERGETLSR: /* Get line status register */
4070 ret_val = get_lsr_info(info, argp);
4071 break;
4072 /*
4073 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4074 * - mask passed in arg for lines of interest
4075 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4076 * Caller should use TIOCGICOUNT to see which one it was
4077 */
4078 case TIOCMIWAIT:
4079 CY_LOCK(info, flags);
4080 /* note the counters on entry */
4081 cprev = info->icount;
4082 CY_UNLOCK(info, flags);
4083 while (1) {
4084 interruptible_sleep_on(&info->delta_msr_wait);
4085 /* see if a signal did it */
4086 if (signal_pending(current)) {
4087 return -ERESTARTSYS;
4088 }
4089
4090 CY_LOCK(info, flags);
4091 cnow = info->icount; /* atomic copy */
4092 CY_UNLOCK(info, flags);
4093
4094 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4095 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4096 return -EIO; /* no change => error */
4097 }
4098 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4099 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4100 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4101 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
4102 return 0;
4103 }
4104 cprev = cnow;
4105 }
4106 /* NOTREACHED */
4107
4108 /*
4109 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4110 * Return: write counters to the user passed counter struct
4111 * NB: both 1->0 and 0->1 transitions are counted except for
4112 * RI where only 0->1 is counted.
4113 */
4114 case TIOCGICOUNT:
4115 CY_LOCK(info, flags);
4116 cnow = info->icount;
4117 CY_UNLOCK(info, flags);
4118 p_cuser = argp;
4119 ret_val = put_user(cnow.cts, &p_cuser->cts);
4120 if (ret_val) return ret_val;
4121 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4122 if (ret_val) return ret_val;
4123 ret_val = put_user(cnow.rng, &p_cuser->rng);
4124 if (ret_val) return ret_val;
4125 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4126 if (ret_val) return ret_val;
4127 ret_val = put_user(cnow.rx, &p_cuser->rx);
4128 if (ret_val) return ret_val;
4129 ret_val = put_user(cnow.tx, &p_cuser->tx);
4130 if (ret_val) return ret_val;
4131 ret_val = put_user(cnow.frame, &p_cuser->frame);
4132 if (ret_val) return ret_val;
4133 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4134 if (ret_val) return ret_val;
4135 ret_val = put_user(cnow.parity, &p_cuser->parity);
4136 if (ret_val) return ret_val;
4137 ret_val = put_user(cnow.brk, &p_cuser->brk);
4138 if (ret_val) return ret_val;
4139 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4140 if (ret_val) return ret_val;
4141 ret_val = 0;
4142 break;
4143 default:
4144 ret_val = -ENOIOCTLCMD;
4145 }
4146
4147 #ifdef CY_DEBUG_OTHER
4148 printk(" cyc:cy_ioctl done\n");
4149 #endif
4150
4151 return ret_val;
4152 } /* cy_ioctl */
4153
4154
4155 /*
4156 * This routine allows the tty driver to be notified when
4157 * device's termios settings have changed. Note that a
4158 * well-designed tty driver should be prepared to accept the case
4159 * where old == NULL, and try to do something rational.
4160 */
4161 static void
4162 cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
4163 {
4164 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4165
4166 #ifdef CY_DEBUG_OTHER
4167 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4168 #endif
4169
4170 if ((tty->termios->c_cflag == old_termios->c_cflag) &&
4171 ((tty->termios->c_iflag & (IXON|IXANY)) ==
4172 (old_termios->c_iflag & (IXON|IXANY))))
4173 return;
4174 set_line_char(info);
4175
4176 if ((old_termios->c_cflag & CRTSCTS) &&
4177 !(tty->termios->c_cflag & CRTSCTS)) {
4178 tty->hw_stopped = 0;
4179 cy_start(tty);
4180 }
4181 #if 0
4182 /*
4183 * No need to wake up processes in open wait, since they
4184 * sample the CLOCAL flag once, and don't recheck it.
4185 * XXX It's not clear whether the current behavior is correct
4186 * or not. Hence, this may change.....
4187 */
4188 if (!(old_termios->c_cflag & CLOCAL) &&
4189 (tty->termios->c_cflag & CLOCAL))
4190 wake_up_interruptible(&info->open_wait);
4191 #endif
4192
4193 return;
4194 } /* cy_set_termios */
4195
4196 /* This function is used to send a high-priority XON/XOFF character to
4197 the device.
4198 */
4199 static void
4200 cy_send_xchar (struct tty_struct *tty, char ch)
4201 {
4202 struct cyclades_port *info = (struct cyclades_port *) tty->driver_data;
4203 int card, channel;
4204
4205 if (serial_paranoia_check (info, tty->name, "cy_send_xchar"))
4206 return;
4207
4208 info->x_char = ch;
4209
4210 if (ch)
4211 cy_start (tty);
4212
4213 card = info->card;
4214 channel = info->line - cy_card[card].first_line;
4215
4216 if (IS_CYC_Z (cy_card[card])) {
4217 if (ch == STOP_CHAR (tty))
4218 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
4219 else if (ch == START_CHAR (tty))
4220 cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXON, 0L);
4221 }
4222 }
4223
4224 /* This routine is called by the upper-layer tty layer to signal
4225 that incoming characters should be throttled because the input
4226 buffers are close to full.
4227 */
4228 static void
4229 cy_throttle(struct tty_struct * tty)
4230 {
4231 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4232 unsigned long flags;
4233 void __iomem *base_addr;
4234 int card,chip,channel,index;
4235
4236 #ifdef CY_DEBUG_THROTTLE
4237 char buf[64];
4238
4239 printk("cyc:throttle %s: %d....ttyC%d\n",
4240 tty_name(tty, buf),
4241 tty->ldisc.chars_in_buffer(tty), info->line);
4242 #endif
4243
4244 if (serial_paranoia_check(info, tty->name, "cy_throttle")){
4245 return;
4246 }
4247
4248 card = info->card;
4249
4250 if (I_IXOFF(tty)) {
4251 if (!IS_CYC_Z (cy_card[card]))
4252 cy_send_xchar (tty, STOP_CHAR (tty));
4253 else
4254 info->throttle = 1;
4255 }
4256
4257 if (tty->termios->c_cflag & CRTSCTS) {
4258 channel = info->line - cy_card[card].first_line;
4259 if (!IS_CYC_Z(cy_card[card])) {
4260 chip = channel>>2;
4261 channel &= 0x03;
4262 index = cy_card[card].bus_index;
4263 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4264
4265 CY_LOCK(info, flags);
4266 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4267 if (info->rtsdtr_inv) {
4268 cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
4269 } else {
4270 cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
4271 }
4272 CY_UNLOCK(info, flags);
4273 } else {
4274 info->throttle = 1;
4275 }
4276 }
4277
4278 return;
4279 } /* cy_throttle */
4280
4281
4282 /*
4283 * This routine notifies the tty driver that it should signal
4284 * that characters can now be sent to the tty without fear of
4285 * overrunning the input buffers of the line disciplines.
4286 */
4287 static void
4288 cy_unthrottle(struct tty_struct * tty)
4289 {
4290 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4291 unsigned long flags;
4292 void __iomem *base_addr;
4293 int card,chip,channel,index;
4294
4295 #ifdef CY_DEBUG_THROTTLE
4296 char buf[64];
4297
4298 printk("cyc:unthrottle %s: %d....ttyC%d\n",
4299 tty_name(tty, buf),
4300 tty->ldisc.chars_in_buffer(tty), info->line);
4301 #endif
4302
4303 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")){
4304 return;
4305 }
4306
4307 if (I_IXOFF(tty)) {
4308 if (info->x_char)
4309 info->x_char = 0;
4310 else
4311 cy_send_xchar (tty, START_CHAR (tty));
4312 }
4313
4314 if (tty->termios->c_cflag & CRTSCTS) {
4315 card = info->card;
4316 channel = info->line - cy_card[card].first_line;
4317 if (!IS_CYC_Z(cy_card[card])) {
4318 chip = channel>>2;
4319 channel &= 0x03;
4320 index = cy_card[card].bus_index;
4321 base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
4322
4323 CY_LOCK(info, flags);
4324 cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
4325 if (info->rtsdtr_inv) {
4326 cy_writeb(base_addr+(CyMSVR2<<index), CyDTR);
4327 } else {
4328 cy_writeb(base_addr+(CyMSVR1<<index), CyRTS);
4329 }
4330 CY_UNLOCK(info, flags);
4331 } else {
4332 info->throttle = 0;
4333 }
4334 }
4335
4336 return;
4337 } /* cy_unthrottle */
4338
4339
4340 /* cy_start and cy_stop provide software output flow control as a
4341 function of XON/XOFF, software CTS, and other such stuff.
4342 */
4343 static void
4344 cy_stop(struct tty_struct *tty)
4345 {
4346 struct cyclades_card *cinfo;
4347 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4348 void __iomem *base_addr;
4349 int chip,channel,index;
4350 unsigned long flags;
4351
4352 #ifdef CY_DEBUG_OTHER
4353 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4354 #endif
4355
4356 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4357 return;
4358
4359 cinfo = &cy_card[info->card];
4360 channel = info->line - cinfo->first_line;
4361 if (!IS_CYC_Z(*cinfo)) {
4362 index = cinfo->bus_index;
4363 chip = channel>>2;
4364 channel &= 0x03;
4365 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4366
4367 CY_LOCK(info, flags);
4368 cy_writeb(base_addr+(CyCAR<<index),
4369 (u_char)(channel & 0x0003)); /* index channel */
4370 cy_writeb(base_addr+(CySRER<<index),
4371 cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
4372 CY_UNLOCK(info, flags);
4373 } else {
4374 // Nothing to do!
4375 }
4376
4377 return;
4378 } /* cy_stop */
4379
4380
4381 static void
4382 cy_start(struct tty_struct *tty)
4383 {
4384 struct cyclades_card *cinfo;
4385 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4386 void __iomem *base_addr;
4387 int chip,channel,index;
4388 unsigned long flags;
4389
4390 #ifdef CY_DEBUG_OTHER
4391 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4392 #endif
4393
4394 if (serial_paranoia_check(info, tty->name, "cy_start"))
4395 return;
4396
4397 cinfo = &cy_card[info->card];
4398 channel = info->line - cinfo->first_line;
4399 index = cinfo->bus_index;
4400 if (!IS_CYC_Z(*cinfo)) {
4401 chip = channel>>2;
4402 channel &= 0x03;
4403 base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
4404
4405 CY_LOCK(info, flags);
4406 cy_writeb(base_addr+(CyCAR<<index),
4407 (u_char)(channel & 0x0003)); /* index channel */
4408 cy_writeb(base_addr+(CySRER<<index),
4409 cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
4410 CY_UNLOCK(info, flags);
4411 } else {
4412 // Nothing to do!
4413 }
4414
4415 return;
4416 } /* cy_start */
4417
4418
4419 static void
4420 cy_flush_buffer(struct tty_struct *tty)
4421 {
4422 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4423 int card, channel, retval;
4424 unsigned long flags;
4425
4426 #ifdef CY_DEBUG_IO
4427 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4428 #endif
4429
4430 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4431 return;
4432
4433 card = info->card;
4434 channel = (info->line) - (cy_card[card].first_line);
4435
4436 CY_LOCK(info, flags);
4437 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4438 CY_UNLOCK(info, flags);
4439
4440 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4441 buffers as well */
4442 CY_LOCK(info, flags);
4443 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4444 if (retval != 0) {
4445 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4446 info->line, retval);
4447 }
4448 CY_UNLOCK(info, flags);
4449 }
4450 tty_wakeup(tty);
4451 wake_up_interruptible(&tty->write_wait);
4452 } /* cy_flush_buffer */
4453
4454
4455 /*
4456 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4457 */
4458 static void
4459 cy_hangup(struct tty_struct *tty)
4460 {
4461 struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
4462
4463 #ifdef CY_DEBUG_OTHER
4464 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4465 #endif
4466
4467 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4468 return;
4469
4470 cy_flush_buffer(tty);
4471 shutdown(info);
4472 info->event = 0;
4473 info->count = 0;
4474 #ifdef CY_DEBUG_COUNT
4475 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4476 #endif
4477 info->tty = NULL;
4478 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4479 wake_up_interruptible(&info->open_wait);
4480 } /* cy_hangup */
4481
4482
4483 /*
4484 * ---------------------------------------------------------------------
4485 * cy_init() and friends
4486 *
4487 * cy_init() is called at boot-time to initialize the serial driver.
4488 * ---------------------------------------------------------------------
4489 */
4490
4491 /* initialize chips on Cyclom-Y card -- return number of valid
4492 chips (which is number of ports/4) */
4493 static unsigned short __init
4494 cyy_init_card(void __iomem *true_base_addr,int index)
4495 {
4496 unsigned int chip_number;
4497 void __iomem *base_addr;
4498
4499 cy_writeb(true_base_addr+(Cy_HwReset<<index), 0);
4500 /* Cy_HwReset is 0x1400 */
4501 cy_writeb(true_base_addr+(Cy_ClrIntr<<index), 0);
4502 /* Cy_ClrIntr is 0x1800 */
4503 udelay(500L);
4504
4505 for(chip_number=0; chip_number<CyMAX_CHIPS_PER_CARD; chip_number++){
4506 base_addr = true_base_addr + (cy_chip_offset[chip_number]<<index);
4507 mdelay(1);
4508 if(cy_readb(base_addr+(CyCCR<<index)) != 0x00){
4509 /*************
4510 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4511 chip_number, (unsigned long)base_addr);
4512 *************/
4513 return chip_number;
4514 }
4515
4516 cy_writeb(base_addr+(CyGFRCR<<index), 0);
4517 udelay(10L);
4518
4519 /* The Cyclom-16Y does not decode address bit 9 and therefore
4520 cannot distinguish between references to chip 0 and a non-
4521 existent chip 4. If the preceding clearing of the supposed
4522 chip 4 GFRCR register appears at chip 0, there is no chip 4
4523 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4524 */
4525 if (chip_number == 4
4526 && cy_readb(true_base_addr
4527 + (cy_chip_offset[0]<<index)
4528 + (CyGFRCR<<index)) == 0){
4529 return chip_number;
4530 }
4531
4532 cy_writeb(base_addr+(CyCCR<<index), CyCHIP_RESET);
4533 mdelay(1);
4534
4535 if(cy_readb(base_addr+(CyGFRCR<<index)) == 0x00){
4536 /*
4537 printk(" chip #%d at %#6lx is not responding ",
4538 chip_number, (unsigned long)base_addr);
4539 printk("(GFRCR stayed 0)\n",
4540 */
4541 return chip_number;
4542 }
4543 if((0xf0 & (cy_readb(base_addr+(CyGFRCR<<index)))) != 0x40){
4544 /*
4545 printk(" chip #%d at %#6lx is not valid (GFRCR == %#2x)\n",
4546 chip_number, (unsigned long)base_addr,
4547 base_addr[CyGFRCR<<index]);
4548 */
4549 return chip_number;
4550 }
4551 cy_writeb(base_addr+(CyGCR<<index), CyCH0_SERIAL);
4552 if (cy_readb(base_addr+(CyGFRCR<<index)) >= CD1400_REV_J){
4553 /* It is a CD1400 rev. J or later */
4554 /* Impossible to reach 5ms with this chip.
4555 Changed to 2ms instead (f = 500 Hz). */
4556 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_60_2MS);
4557 } else {
4558 /* f = 200 Hz */
4559 cy_writeb(base_addr+(CyPPR<<index), CyCLOCK_25_5MS);
4560 }
4561
4562 /*
4563 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4564 chip_number, (unsigned long)base_addr,
4565 cy_readb(base_addr+(CyGFRCR<<index)));
4566 */
4567 }
4568 return chip_number;
4569 } /* cyy_init_card */
4570
4571 /*
4572 * ---------------------------------------------------------------------
4573 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4574 * sets global variables and return the number of ISA boards found.
4575 * ---------------------------------------------------------------------
4576 */
4577 static int __init
4578 cy_detect_isa(void)
4579 {
4580 #ifdef CONFIG_ISA
4581 unsigned short cy_isa_irq,nboard;
4582 void __iomem *cy_isa_address;
4583 unsigned short i,j,cy_isa_nchan;
4584 #ifdef MODULE
4585 int isparam = 0;
4586 #endif
4587
4588 nboard = 0;
4589
4590 #ifdef MODULE
4591 /* Check for module parameters */
4592 for(i = 0 ; i < NR_CARDS; i++) {
4593 if (maddr[i] || i) {
4594 isparam = 1;
4595 cy_isa_addresses[i] = maddr[i];
4596 }
4597 if (!maddr[i])
4598 break;
4599 }
4600 #endif
4601
4602 /* scan the address table probing for Cyclom-Y/ISA boards */
4603 for (i = 0 ; i < NR_ISA_ADDRS ; i++) {
4604 unsigned int isa_address = cy_isa_addresses[i];
4605 if (isa_address == 0x0000) {
4606 return(nboard);
4607 }
4608
4609 /* probe for CD1400... */
4610 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4611 cy_isa_nchan = CyPORTS_PER_CHIP *
4612 cyy_init_card(cy_isa_address,0);
4613 if (cy_isa_nchan == 0) {
4614 continue;
4615 }
4616
4617 #ifdef MODULE
4618 if (isparam && irq[i])
4619 cy_isa_irq = irq[i];
4620 else
4621 #endif
4622 /* find out the board's irq by probing */
4623 cy_isa_irq = detect_isa_irq(cy_isa_address);
4624 if (cy_isa_irq == 0) {
4625 printk("Cyclom-Y/ISA found at 0x%lx ",
4626 (unsigned long) cy_isa_address);
4627 printk("but the IRQ could not be detected.\n");
4628 continue;
4629 }
4630
4631 if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
4632 printk("Cyclom-Y/ISA found at 0x%lx ",
4633 (unsigned long) cy_isa_address);
4634 printk("but no more channels are available.\n");
4635 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4636 return(nboard);
4637 }
4638 /* fill the next cy_card structure available */
4639 for (j = 0 ; j < NR_CARDS ; j++) {
4640 if (cy_card[j].base_addr == 0) break;
4641 }
4642 if (j == NR_CARDS) { /* no more cy_cards available */
4643 printk("Cyclom-Y/ISA found at 0x%lx ",
4644 (unsigned long) cy_isa_address);
4645 printk("but no more cards can be used .\n");
4646 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4647 return(nboard);
4648 }
4649
4650 /* allocate IRQ */
4651 if(request_irq(cy_isa_irq, cyy_interrupt,
4652 SA_INTERRUPT, "Cyclom-Y", &cy_card[j]))
4653 {
4654 printk("Cyclom-Y/ISA found at 0x%lx ",
4655 (unsigned long) cy_isa_address);
4656 printk("but could not allocate IRQ#%d.\n",
4657 cy_isa_irq);
4658 return(nboard);
4659 }
4660
4661 /* set cy_card */
4662 cy_card[j].base_addr = cy_isa_address;
4663 cy_card[j].ctl_addr = NULL;
4664 cy_card[j].irq = (int) cy_isa_irq;
4665 cy_card[j].bus_index = 0;
4666 cy_card[j].first_line = cy_next_channel;
4667 cy_card[j].num_chips = cy_isa_nchan/4;
4668 nboard++;
4669
4670 /* print message */
4671 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4672 j+1, (unsigned long) cy_isa_address,
4673 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4674 cy_isa_irq);
4675 printk("%d channels starting from port %d.\n",
4676 cy_isa_nchan, cy_next_channel);
4677 cy_next_channel += cy_isa_nchan;
4678 }
4679 return(nboard);
4680 #else
4681 return(0);
4682 #endif /* CONFIG_ISA */
4683 } /* cy_detect_isa */
4684
4685 static void
4686 plx_init(void __iomem *addr, uclong initctl)
4687 {
4688 /* Reset PLX */
4689 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4690 udelay(100L);
4691 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4692
4693 /* Reload Config. Registers from EEPROM */
4694 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4695 udelay(100L);
4696 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4697 }
4698
4699 /*
4700 * ---------------------------------------------------------------------
4701 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4702 * sets global variables and return the number of PCI boards found.
4703 * ---------------------------------------------------------------------
4704 */
4705 static int __init
4706 cy_detect_pci(void)
4707 {
4708 #ifdef CONFIG_PCI
4709
4710 struct pci_dev *pdev = NULL;
4711 unsigned char cyy_rev_id;
4712 unsigned char cy_pci_irq = 0;
4713 uclong cy_pci_phys0, cy_pci_phys2;
4714 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4715 unsigned short i,j,cy_pci_nchan, plx_ver;
4716 unsigned short device_id,dev_index = 0;
4717 uclong mailbox;
4718 uclong ZeIndex = 0;
4719 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4720 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4721 unsigned char Ze_irq[NR_CARDS];
4722 struct pci_dev *Ze_pdev[NR_CARDS];
4723
4724 for (i = 0; i < NR_CARDS; i++) {
4725 /* look for a Cyclades card by vendor and device id */
4726 while((device_id = cy_pci_dev_id[dev_index]) != 0) {
4727 if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4728 device_id, pdev)) == NULL) {
4729 dev_index++; /* try next device id */
4730 } else {
4731 break; /* found a board */
4732 }
4733 }
4734
4735 if (device_id == 0)
4736 break;
4737
4738 if (pci_enable_device(pdev))
4739 continue;
4740
4741 /* read PCI configuration area */
4742 cy_pci_irq = pdev->irq;
4743 cy_pci_phys0 = pci_resource_start(pdev, 0);
4744 cy_pci_phys2 = pci_resource_start(pdev, 2);
4745 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4746
4747 device_id &= ~PCI_DEVICE_ID_MASK;
4748
4749 if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
4750 || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
4751 #ifdef CY_PCI_DEBUG
4752 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4753 pdev->bus->number, pdev->devfn);
4754 printk("rev_id=%d) IRQ%d\n",
4755 cyy_rev_id, (int)cy_pci_irq);
4756 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4757 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4758 #endif
4759
4760 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4761 printk(" Warning: PCI I/O bit incorrectly set. "
4762 "Ignoring it...\n");
4763 pdev->resource[2].flags &= ~IORESOURCE_IO;
4764 }
4765
4766 /* Although we don't use this I/O region, we should
4767 request it from the kernel anyway, to avoid problems
4768 with other drivers accessing it. */
4769 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4770 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4771 continue;
4772 }
4773
4774 #if defined(__alpha__)
4775 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4776 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4777 pdev->bus->number, pdev->devfn);
4778 printk("rev_id=%d) IRQ%d\n",
4779 cyy_rev_id, (int)cy_pci_irq);
4780 printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
4781 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4782 printk("Cyclom-Y/PCI not supported for low addresses in "
4783 "Alpha systems.\n");
4784 i--;
4785 continue;
4786 }
4787 #endif
4788 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4789 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4790
4791 #ifdef CY_PCI_DEBUG
4792 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4793 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4794 #endif
4795 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4796 cyy_init_card(cy_pci_addr2, 1));
4797 if(cy_pci_nchan == 0) {
4798 printk("Cyclom-Y PCI host card with ");
4799 printk("no Serial-Modules at 0x%lx.\n",
4800 (ulong) cy_pci_phys2);
4801 i--;
4802 continue;
4803 }
4804 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4805 printk("Cyclom-Y/PCI found at 0x%lx ",
4806 (ulong) cy_pci_phys2);
4807 printk("but no channels are available.\n");
4808 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4809 return(i);
4810 }
4811 /* fill the next cy_card structure available */
4812 for (j = 0 ; j < NR_CARDS ; j++) {
4813 if (cy_card[j].base_addr == 0) break;
4814 }
4815 if (j == NR_CARDS) { /* no more cy_cards available */
4816 printk("Cyclom-Y/PCI found at 0x%lx ",
4817 (ulong) cy_pci_phys2);
4818 printk("but no more cards can be used.\n");
4819 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4820 return(i);
4821 }
4822
4823 /* allocate IRQ */
4824 if(request_irq(cy_pci_irq, cyy_interrupt,
4825 SA_SHIRQ, "Cyclom-Y", &cy_card[j]))
4826 {
4827 printk("Cyclom-Y/PCI found at 0x%lx ",
4828 (ulong) cy_pci_phys2);
4829 printk("but could not allocate IRQ%d.\n",
4830 cy_pci_irq);
4831 return(i);
4832 }
4833
4834 /* set cy_card */
4835 cy_card[j].base_phys = (ulong)cy_pci_phys2;
4836 cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
4837 cy_card[j].base_addr = cy_pci_addr2;
4838 cy_card[j].ctl_addr = cy_pci_addr0;
4839 cy_card[j].irq = (int) cy_pci_irq;
4840 cy_card[j].bus_index = 1;
4841 cy_card[j].first_line = cy_next_channel;
4842 cy_card[j].num_chips = cy_pci_nchan/4;
4843 cy_card[j].pdev = pdev;
4844
4845 /* enable interrupts in the PCI interface */
4846 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4847 switch (plx_ver) {
4848 case PLX_9050:
4849
4850 cy_writeb(cy_pci_addr0+0x4c, 0x43);
4851 break;
4852
4853 case PLX_9060:
4854 case PLX_9080:
4855 default: /* Old boards, use PLX_9060 */
4856
4857 plx_init(cy_pci_addr0, 0x6c);
4858 /* For some yet unknown reason, once the PLX9060 reloads
4859 the EEPROM, the IRQ is lost and, thus, we have to
4860 re-write it to the PCI config. registers.
4861 This will remain here until we find a permanent fix. */
4862 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4863
4864 cy_writew(cy_pci_addr0+0x68,
4865 cy_readw(cy_pci_addr0+0x68)|0x0900);
4866 break;
4867 }
4868
4869 /* print message */
4870 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4871 j+1,
4872 (ulong)cy_pci_phys2,
4873 (ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
4874 (int)cy_pci_irq);
4875 printk("%d channels starting from port %d.\n",
4876 cy_pci_nchan, cy_next_channel);
4877
4878 cy_next_channel += cy_pci_nchan;
4879 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
4880 /* print message */
4881 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4882 pdev->bus->number, pdev->devfn);
4883 printk("rev_id=%d) IRQ%d\n",
4884 cyy_rev_id, (int)cy_pci_irq);
4885 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4886 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4887 printk("Cyclades-Z/PCI not supported for low addresses\n");
4888 break;
4889 }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
4890 #ifdef CY_PCI_DEBUG
4891 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4892 pdev->bus->number, pdev->devfn);
4893 printk("rev_id=%d) IRQ%d\n",
4894 cyy_rev_id, (int)cy_pci_irq);
4895 printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
4896 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4897 #endif
4898 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4899
4900 /* Disable interrupts on the PLX before resetting it */
4901 cy_writew(cy_pci_addr0+0x68,
4902 cy_readw(cy_pci_addr0+0x68) & ~0x0900);
4903
4904 plx_init(cy_pci_addr0, 0x6c);
4905 /* For some yet unknown reason, once the PLX9060 reloads
4906 the EEPROM, the IRQ is lost and, thus, we have to
4907 re-write it to the PCI config. registers.
4908 This will remain here until we find a permanent fix. */
4909 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
4910
4911 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4912 cy_pci_addr0)->mail_box_0);
4913
4914 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4915 printk(" Warning: PCI I/O bit incorrectly set. "
4916 "Ignoring it...\n");
4917 pdev->resource[2].flags &= ~IORESOURCE_IO;
4918 }
4919
4920 /* Although we don't use this I/O region, we should
4921 request it from the kernel anyway, to avoid problems
4922 with other drivers accessing it. */
4923 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4924 printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
4925 continue;
4926 }
4927
4928 if (mailbox == ZE_V1) {
4929 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
4930 if (ZeIndex == NR_CARDS) {
4931 printk("Cyclades-Ze/PCI found at 0x%lx ",
4932 (ulong)cy_pci_phys2);
4933 printk("but no more cards can be used.\n");
4934 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4935 } else {
4936 Ze_phys0[ZeIndex] = cy_pci_phys0;
4937 Ze_phys2[ZeIndex] = cy_pci_phys2;
4938 Ze_addr0[ZeIndex] = cy_pci_addr0;
4939 Ze_addr2[ZeIndex] = cy_pci_addr2;
4940 Ze_irq[ZeIndex] = cy_pci_irq;
4941 Ze_pdev[ZeIndex] = pdev;
4942 ZeIndex++;
4943 }
4944 i--;
4945 continue;
4946 } else {
4947 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
4948 }
4949
4950 #ifdef CY_PCI_DEBUG
4951 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4952 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4953 if (mailbox == ZO_V1) {
4954 cy_writel(&((struct RUNTIME_9060 *)
4955 (cy_pci_addr0))->loc_addr_base, WIN_CREG);
4956 PAUSE
4957 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
4958 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4959 (cy_pci_addr2))->fpga_id)),
4960 (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
4961 (cy_pci_addr2))->fpga_version)));
4962 cy_writel(&((struct RUNTIME_9060 *)
4963 (cy_pci_addr0))->loc_addr_base, WIN_RAM);
4964 } else {
4965 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
4966 }
4967 #endif
4968 /* The following clears the firmware id word. This ensures
4969 that the driver will not attempt to talk to the board
4970 until it has been properly initialized.
4971 */
4972 PAUSE
4973 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
4974 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
4975
4976 /* This must be a Cyclades-8Zo/PCI. The extendable
4977 version will have a different device_id and will
4978 be allocated its maximum number of ports. */
4979 cy_pci_nchan = 8;
4980
4981 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
4982 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4983 (ulong)cy_pci_phys2);
4984 printk("but no channels are available.\n");
4985 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
4986 return(i);
4987 }
4988
4989 /* fill the next cy_card structure available */
4990 for (j = 0 ; j < NR_CARDS ; j++) {
4991 if (cy_card[j].base_addr == 0) break;
4992 }
4993 if (j == NR_CARDS) { /* no more cy_cards available */
4994 printk("Cyclades-8Zo/PCI found at 0x%lx ",
4995 (ulong)cy_pci_phys2);
4996 printk("but no more cards can be used.\n");
4997 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
4998 return(i);
4999 }
5000
5001 #ifdef CONFIG_CYZ_INTR
5002 /* allocate IRQ only if board has an IRQ */
5003 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
5004 if(request_irq(cy_pci_irq, cyz_interrupt,
5005 SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
5006 {
5007 printk("Cyclom-8Zo/PCI found at 0x%lx ",
5008 (ulong) cy_pci_phys2);
5009 printk("but could not allocate IRQ%d.\n",
5010 cy_pci_irq);
5011 return(i);
5012 }
5013 }
5014 #endif /* CONFIG_CYZ_INTR */
5015
5016
5017 /* set cy_card */
5018 cy_card[j].base_phys = cy_pci_phys2;
5019 cy_card[j].ctl_phys = cy_pci_phys0;
5020 cy_card[j].base_addr = cy_pci_addr2;
5021 cy_card[j].ctl_addr = cy_pci_addr0;
5022 cy_card[j].irq = (int) cy_pci_irq;
5023 cy_card[j].bus_index = 1;
5024 cy_card[j].first_line = cy_next_channel;
5025 cy_card[j].num_chips = -1;
5026 cy_card[j].pdev = pdev;
5027
5028 /* print message */
5029 #ifdef CONFIG_CYZ_INTR
5030 /* don't report IRQ if board is no IRQ */
5031 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
5032 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5033 j+1,(ulong)cy_pci_phys2,
5034 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
5035 (int)cy_pci_irq);
5036 else
5037 #endif /* CONFIG_CYZ_INTR */
5038 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5039 j+1,(ulong)cy_pci_phys2,
5040 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5041
5042 printk("%d channels starting from port %d.\n",
5043 cy_pci_nchan,cy_next_channel);
5044 cy_next_channel += cy_pci_nchan;
5045 }
5046 }
5047
5048 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5049 cy_pci_phys0 = Ze_phys0[0];
5050 cy_pci_phys2 = Ze_phys2[0];
5051 cy_pci_addr0 = Ze_addr0[0];
5052 cy_pci_addr2 = Ze_addr2[0];
5053 cy_pci_irq = Ze_irq[0];
5054 pdev = Ze_pdev[0];
5055 for (j = 0 ; j < ZeIndex-1 ; j++) {
5056 Ze_phys0[j] = Ze_phys0[j+1];
5057 Ze_phys2[j] = Ze_phys2[j+1];
5058 Ze_addr0[j] = Ze_addr0[j+1];
5059 Ze_addr2[j] = Ze_addr2[j+1];
5060 Ze_irq[j] = Ze_irq[j+1];
5061 Ze_pdev[j] = Ze_pdev[j+1];
5062 }
5063 ZeIndex--;
5064 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5065 cy_pci_addr0)->mail_box_0);
5066 #ifdef CY_PCI_DEBUG
5067 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5068 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5069 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
5070 #endif
5071 PAUSE
5072 /* This must be the new Cyclades-Ze/PCI. */
5073 cy_pci_nchan = ZE_V1_NPORTS;
5074
5075 if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
5076 printk("Cyclades-Ze/PCI found at 0x%lx ",
5077 (ulong)cy_pci_phys2);
5078 printk("but no channels are available.\n");
5079 printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
5080 return(i);
5081 }
5082
5083 /* fill the next cy_card structure available */
5084 for (j = 0 ; j < NR_CARDS ; j++) {
5085 if (cy_card[j].base_addr == 0) break;
5086 }
5087 if (j == NR_CARDS) { /* no more cy_cards available */
5088 printk("Cyclades-Ze/PCI found at 0x%lx ",
5089 (ulong)cy_pci_phys2);
5090 printk("but no more cards can be used.\n");
5091 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5092 return(i);
5093 }
5094
5095 #ifdef CONFIG_CYZ_INTR
5096 /* allocate IRQ only if board has an IRQ */
5097 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
5098 if(request_irq(cy_pci_irq, cyz_interrupt,
5099 SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
5100 {
5101 printk("Cyclom-Ze/PCI found at 0x%lx ",
5102 (ulong) cy_pci_phys2);
5103 printk("but could not allocate IRQ%d.\n",
5104 cy_pci_irq);
5105 return(i);
5106 }
5107 }
5108 #endif /* CONFIG_CYZ_INTR */
5109
5110 /* set cy_card */
5111 cy_card[j].base_phys = cy_pci_phys2;
5112 cy_card[j].ctl_phys = cy_pci_phys0;
5113 cy_card[j].base_addr = cy_pci_addr2;
5114 cy_card[j].ctl_addr = cy_pci_addr0;
5115 cy_card[j].irq = (int) cy_pci_irq;
5116 cy_card[j].bus_index = 1;
5117 cy_card[j].first_line = cy_next_channel;
5118 cy_card[j].num_chips = -1;
5119 cy_card[j].pdev = pdev;
5120
5121 /* print message */
5122 #ifdef CONFIG_CYZ_INTR
5123 /* don't report IRQ if board is no IRQ */
5124 if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
5125 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5126 j+1,(ulong)cy_pci_phys2,
5127 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
5128 (int)cy_pci_irq);
5129 else
5130 #endif /* CONFIG_CYZ_INTR */
5131 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5132 j+1,(ulong)cy_pci_phys2,
5133 (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
5134
5135 printk("%d channels starting from port %d.\n",
5136 cy_pci_nchan,cy_next_channel);
5137 cy_next_channel += cy_pci_nchan;
5138 }
5139 if (ZeIndex != 0) {
5140 printk("Cyclades-Ze/PCI found at 0x%x ",
5141 (unsigned int) Ze_phys2[0]);
5142 printk("but no more cards can be used.\n");
5143 printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
5144 }
5145 return(i);
5146 #else
5147 return(0);
5148 #endif /* ifdef CONFIG_PCI */
5149 } /* cy_detect_pci */
5150
5151
5152 /*
5153 * This routine prints out the appropriate serial driver version number
5154 * and identifies which options were configured into this driver.
5155 */
5156 static inline void
5157 show_version(void)
5158 {
5159 char *rcsvers, *rcsdate, *tmp;
5160 rcsvers = strchr(rcsid, ' '); rcsvers++;
5161 tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
5162 rcsdate = strchr(tmp, ' '); rcsdate++;
5163 tmp = strrchr(rcsdate, ' '); *tmp = '\0';
5164 printk("Cyclades driver %s %s\n",
5165 rcsvers, rcsdate);
5166 printk(" built %s %s\n",
5167 __DATE__, __TIME__);
5168 } /* show_version */
5169
5170 static int
5171 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5172 int *eof, void *data)
5173 {
5174 struct cyclades_port *info;
5175 int i;
5176 int len=0;
5177 off_t begin=0;
5178 off_t pos=0;
5179 int size;
5180 __u32 cur_jifs = jiffies;
5181
5182 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn IdleIn Overruns Ldisc\n");
5183
5184 pos += size;
5185 len += size;
5186
5187 /* Output one line for each known port */
5188 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5189 info = &cy_port[i];
5190
5191 if (info->count)
5192 size = sprintf(buf+len,
5193 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5194 info->line,
5195 JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
5196 info->idle_stats.xmit_bytes,
5197 JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
5198 info->idle_stats.recv_bytes,
5199 JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
5200 info->idle_stats.overruns,
5201 (long) info->tty->ldisc.num);
5202 else
5203 size = sprintf(buf+len,
5204 "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
5205 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5206 len += size;
5207 pos = begin + len;
5208
5209 if (pos < offset) {
5210 len = 0;
5211 begin = pos;
5212 }
5213 if (pos > offset + length)
5214 goto done;
5215 }
5216 *eof = 1;
5217 done:
5218 *start = buf + (offset - begin); /* Start of wanted data */
5219 len -= (offset - begin); /* Start slop */
5220 if (len > length)
5221 len = length; /* Ending slop */
5222 if (len < 0)
5223 len = 0;
5224 return len;
5225 }
5226
5227 /* The serial driver boot-time initialization code!
5228 Hardware I/O ports are mapped to character special devices on a
5229 first found, first allocated manner. That is, this code searches
5230 for Cyclom cards in the system. As each is found, it is probed
5231 to discover how many chips (and thus how many ports) are present.
5232 These ports are mapped to the tty ports 32 and upward in monotonic
5233 fashion. If an 8-port card is replaced with a 16-port card, the
5234 port mapping on a following card will shift.
5235
5236 This approach is different from what is used in the other serial
5237 device driver because the Cyclom is more properly a multiplexer,
5238 not just an aggregation of serial ports on one card.
5239
5240 If there are more cards with more ports than have been
5241 statically allocated above, a warning is printed and the
5242 extra ports are ignored.
5243 */
5244
5245 static struct tty_operations cy_ops = {
5246 .open = cy_open,
5247 .close = cy_close,
5248 .write = cy_write,
5249 .put_char = cy_put_char,
5250 .flush_chars = cy_flush_chars,
5251 .write_room = cy_write_room,
5252 .chars_in_buffer = cy_chars_in_buffer,
5253 .flush_buffer = cy_flush_buffer,
5254 .ioctl = cy_ioctl,
5255 .throttle = cy_throttle,
5256 .unthrottle = cy_unthrottle,
5257 .set_termios = cy_set_termios,
5258 .stop = cy_stop,
5259 .start = cy_start,
5260 .hangup = cy_hangup,
5261 .break_ctl = cy_break,
5262 .wait_until_sent = cy_wait_until_sent,
5263 .read_proc = cyclades_get_proc_info,
5264 .tiocmget = cy_tiocmget,
5265 .tiocmset = cy_tiocmset,
5266 };
5267
5268 static int __init
5269 cy_init(void)
5270 {
5271 struct cyclades_port *info;
5272 struct cyclades_card *cinfo;
5273 int number_z_boards = 0;
5274 int board,port,i,index;
5275 unsigned long mailbox;
5276 unsigned short chip_number;
5277 int nports;
5278
5279 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5280 if (!cy_serial_driver)
5281 return -ENOMEM;
5282 show_version();
5283
5284 /* Initialize the tty_driver structure */
5285
5286 cy_serial_driver->owner = THIS_MODULE;
5287 cy_serial_driver->driver_name = "cyclades";
5288 cy_serial_driver->name = "ttyC";
5289 cy_serial_driver->devfs_name = "tts/C";
5290 cy_serial_driver->major = CYCLADES_MAJOR;
5291 cy_serial_driver->minor_start = 0;
5292 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5293 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5294 cy_serial_driver->init_termios = tty_std_termios;
5295 cy_serial_driver->init_termios.c_cflag =
5296 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5297 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5298 tty_set_operations(cy_serial_driver, &cy_ops);
5299
5300 if (tty_register_driver(cy_serial_driver))
5301 panic("Couldn't register Cyclades serial driver\n");
5302
5303 for (i = 0; i < NR_CARDS; i++) {
5304 /* base_addr=0 indicates board not found */
5305 cy_card[i].base_addr = NULL;
5306 }
5307
5308 /* the code below is responsible to find the boards. Each different
5309 type of board has its own detection routine. If a board is found,
5310 the next cy_card structure available is set by the detection
5311 routine. These functions are responsible for checking the
5312 availability of cy_card and cy_port data structures and updating
5313 the cy_next_channel. */
5314
5315 /* look for isa boards */
5316 cy_isa_nboard = cy_detect_isa();
5317
5318 /* look for pci boards */
5319 cy_pci_nboard = cy_detect_pci();
5320
5321 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5322
5323 /* invalidate remaining cy_card structures */
5324 for (i = 0 ; i < NR_CARDS ; i++) {
5325 if (cy_card[i].base_addr == 0) {
5326 cy_card[i].first_line = -1;
5327 cy_card[i].ctl_addr = NULL;
5328 cy_card[i].irq = 0;
5329 cy_card[i].bus_index = 0;
5330 cy_card[i].first_line = 0;
5331 cy_card[i].num_chips = 0;
5332 }
5333 }
5334 /* invalidate remaining cy_port structures */
5335 for (i = cy_next_channel ; i < NR_PORTS ; i++) {
5336 cy_port[i].line = -1;
5337 cy_port[i].magic = -1;
5338 }
5339
5340 /* initialize per-port data structures for each valid board found */
5341 for (board = 0 ; board < cy_nboard ; board++) {
5342 cinfo = &cy_card[board];
5343 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5344 number_z_boards++;
5345 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5346 cy_card[board].ctl_addr)->mail_box_0);
5347 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5348 cinfo->intr_enabled = 0;
5349 cinfo->nports = 0; /* Will be correctly set later, after
5350 Z FW is loaded */
5351 spin_lock_init(&cinfo->card_lock);
5352 for (port = cinfo->first_line ;
5353 port < cinfo->first_line + nports;
5354 port++)
5355 {
5356 info = &cy_port[port];
5357 info->magic = CYCLADES_MAGIC;
5358 info->type = PORT_STARTECH;
5359 info->card = board;
5360 info->line = port;
5361 info->chip_rev = 0;
5362 info->flags = STD_COM_FLAGS;
5363 info->tty = NULL;
5364 if (mailbox == ZO_V1)
5365 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5366 else
5367 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
5368 info->cor1 = 0;
5369 info->cor2 = 0;
5370 info->cor3 = 0;
5371 info->cor4 = 0;
5372 info->cor5 = 0;
5373 info->tbpr = 0;
5374 info->tco = 0;
5375 info->rbpr = 0;
5376 info->rco = 0;
5377 info->custom_divisor = 0;
5378 info->close_delay = 5*HZ/10;
5379 info->closing_wait = CLOSING_WAIT_DELAY;
5380 info->icount.cts = info->icount.dsr =
5381 info->icount.rng = info->icount.dcd = 0;
5382 info->icount.rx = info->icount.tx = 0;
5383 info->icount.frame = info->icount.parity = 0;
5384 info->icount.overrun = info->icount.brk = 0;
5385 info->x_char = 0;
5386 info->event = 0;
5387 info->count = 0;
5388 info->blocked_open = 0;
5389 info->default_threshold = 0;
5390 info->default_timeout = 0;
5391 INIT_WORK(&info->tqueue, do_softint, info);
5392 init_waitqueue_head(&info->open_wait);
5393 init_waitqueue_head(&info->close_wait);
5394 init_waitqueue_head(&info->shutdown_wait);
5395 init_waitqueue_head(&info->delta_msr_wait);
5396 /* info->session */
5397 /* info->pgrp */
5398 info->read_status_mask = 0;
5399 /* info->timeout */
5400 /* Bentson's vars */
5401 info->jiffies[0] = 0;
5402 info->jiffies[1] = 0;
5403 info->jiffies[2] = 0;
5404 info->rflush_count = 0;
5405 #ifdef CONFIG_CYZ_INTR
5406 init_timer(&cyz_rx_full_timer[port]);
5407 cyz_rx_full_timer[port].function = NULL;
5408 #endif
5409 }
5410 continue;
5411 }else{ /* Cyclom-Y of some kind*/
5412 index = cinfo->bus_index;
5413 spin_lock_init(&cinfo->card_lock);
5414 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5415 for (port = cinfo->first_line ;
5416 port < cinfo->first_line + cinfo->nports ;
5417 port++)
5418 {
5419 info = &cy_port[port];
5420 info->magic = CYCLADES_MAGIC;
5421 info->type = PORT_CIRRUS;
5422 info->card = board;
5423 info->line = port;
5424 info->flags = STD_COM_FLAGS;
5425 info->tty = NULL;
5426 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5427 info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS;
5428 info->cor2 = CyETC;
5429 info->cor3 = 0x08; /* _very_ small rcv threshold */
5430 info->cor4 = 0;
5431 info->cor5 = 0;
5432 info->custom_divisor = 0;
5433 info->close_delay = 5*HZ/10;
5434 info->closing_wait = CLOSING_WAIT_DELAY;
5435 info->icount.cts = info->icount.dsr =
5436 info->icount.rng = info->icount.dcd = 0;
5437 info->icount.rx = info->icount.tx = 0;
5438 info->icount.frame = info->icount.parity = 0;
5439 info->icount.overrun = info->icount.brk = 0;
5440 chip_number = (port - cinfo->first_line) / 4;
5441 if ((info->chip_rev =
5442 cy_readb(cinfo->base_addr +
5443 (cy_chip_offset[chip_number]<<index) +
5444 (CyGFRCR<<index))) >= CD1400_REV_J) {
5445 /* It is a CD1400 rev. J or later */
5446 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5447 info->tco = baud_co_60[13]; /* Tx CO */
5448 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5449 info->rco = baud_co_60[13]; /* Rx CO */
5450 info->rflow = 0;
5451 info->rtsdtr_inv = 1;
5452 } else {
5453 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5454 info->tco = baud_co_25[13]; /* Tx CO */
5455 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5456 info->rco = baud_co_25[13]; /* Rx CO */
5457 info->rflow = 0;
5458 info->rtsdtr_inv = 0;
5459 }
5460 info->x_char = 0;
5461 info->event = 0;
5462 info->count = 0;
5463 info->blocked_open = 0;
5464 info->default_threshold = 0;
5465 info->default_timeout = 0;
5466 INIT_WORK(&info->tqueue, do_softint, info);
5467 init_waitqueue_head(&info->open_wait);
5468 init_waitqueue_head(&info->close_wait);
5469 init_waitqueue_head(&info->shutdown_wait);
5470 init_waitqueue_head(&info->delta_msr_wait);
5471 /* info->session */
5472 /* info->pgrp */
5473 info->read_status_mask =
5474 CyTIMEOUT| CySPECHAR| CyBREAK
5475 | CyPARITY| CyFRAME| CyOVERRUN;
5476 /* info->timeout */
5477 }
5478 }
5479 }
5480
5481 #ifndef CONFIG_CYZ_INTR
5482 if (number_z_boards && !cyz_timeron){
5483 cyz_timeron++;
5484 cyz_timerlist.expires = jiffies + 1;
5485 add_timer(&cyz_timerlist);
5486 #ifdef CY_PCI_DEBUG
5487 printk("Cyclades-Z polling initialized\n");
5488 #endif
5489 }
5490 #endif /* CONFIG_CYZ_INTR */
5491
5492 return 0;
5493
5494 } /* cy_init */
5495
5496 static void __exit
5497 cy_cleanup_module(void)
5498 {
5499 int i, e1;
5500
5501 #ifndef CONFIG_CYZ_INTR
5502 if (cyz_timeron){
5503 cyz_timeron = 0;
5504 del_timer(&cyz_timerlist);
5505 }
5506 #endif /* CONFIG_CYZ_INTR */
5507
5508 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5509 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5510 e1);
5511
5512 put_tty_driver(cy_serial_driver);
5513
5514 for (i = 0; i < NR_CARDS; i++) {
5515 if (cy_card[i].base_addr) {
5516 iounmap(cy_card[i].base_addr);
5517 if (cy_card[i].ctl_addr)
5518 iounmap(cy_card[i].ctl_addr);
5519 if (cy_card[i].irq
5520 #ifndef CONFIG_CYZ_INTR
5521 && cy_card[i].num_chips != -1 /* not a Z card */
5522 #endif /* CONFIG_CYZ_INTR */
5523 )
5524 free_irq(cy_card[i].irq, &cy_card[i]);
5525 #ifdef CONFIG_PCI
5526 if (cy_card[i].pdev)
5527 pci_release_regions(cy_card[i].pdev);
5528 #endif
5529 }
5530 }
5531 if (tmp_buf) {
5532 free_page((unsigned long) tmp_buf);
5533 tmp_buf = NULL;
5534 }
5535 } /* cy_cleanup_module */
5536
5537 module_init(cy_init);
5538 module_exit(cy_cleanup_module);
5539
5540 MODULE_LICENSE("GPL");
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