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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / char / cyclades.c
blob3ffa0807754c34313f9288299552f97df2c8468f
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
594 #define CY_VERSION "2.4"
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 do {} while (0)
631 #endif
632
633 /*
634 * Include section
635 */
636 #include <linux/module.h>
637 #include <linux/errno.h>
638 #include <linux/signal.h>
639 #include <linux/sched.h>
640 #include <linux/timer.h>
641 #include <linux/interrupt.h>
642 #include <linux/tty.h>
643 #include <linux/tty_flip.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 static struct tty_driver *cy_serial_driver;
702
703 #ifdef CONFIG_ISA
704 /* This is the address lookup table. The driver will probe for
705 Cyclom-Y/ISA boards at all addresses in here. If you want the
706 driver to probe addresses at a different address, add it to
707 this table. If the driver is probing some other board and
708 causing problems, remove the offending address from this table.
709 The cy_setup function extracts additional addresses from the
710 boot options line. The form is "cyclades=address,address..."
711 */
712
713 static unsigned int cy_isa_addresses[] = {
714 0xD0000,
715 0xD2000,
716 0xD4000,
717 0xD6000,
718 0xD8000,
719 0xDA000,
720 0xDC000,
721 0xDE000,
722 0, 0, 0, 0, 0, 0, 0, 0
723 };
724
725 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
726
727 #ifdef MODULE
728 static long maddr[NR_CARDS] = { 0, };
729 static int irq[NR_CARDS] = { 0, };
730
731 module_param_array(maddr, long, NULL, 0);
732 module_param_array(irq, int, NULL, 0);
733 #endif
734
735 #endif /* CONFIG_ISA */
736
737 /* This is the per-card data structure containing address, irq, number of
738 channels, etc. This driver supports a maximum of NR_CARDS cards.
739 */
740 static struct cyclades_card cy_card[NR_CARDS];
741
742 /* This is the per-channel data structure containing pointers, flags
743 and variables for the port. This driver supports a maximum of NR_PORTS.
744 */
745 static struct cyclades_port cy_port[NR_PORTS];
746
747 static int cy_next_channel; /* next minor available */
748
749 /*
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
755 * HI VHI
756 * 20
757 */
758 static int baud_table[] = {
759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
761 230400, 0
762 };
763
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
769 };
770
771 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
774 };
775
776 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781 0x00
782 };
783
784 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
787 0x21
788 };
789
790 static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
793 0x07
794 };
795
796 /*
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
804 * cables.
805 */
806
807 static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
810 0x0a
811 };
812
813 /* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
815 */
816 static int cy_chip_offset[] = { 0x0000,
817 0x0400,
818 0x0800,
819 0x0C00,
820 0x0200,
821 0x0600,
822 0x0A00,
823 0x0E00
824 };
825
826 /* PCI related definitions */
827
828 static unsigned short cy_pci_nboard;
829 static unsigned short cy_isa_nboard;
830 static unsigned short cy_nboard;
831 #ifdef CONFIG_PCI
832 static unsigned short cy_pci_dev_id[] = {
833 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
835 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
836 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
837 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
838 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
839 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
840 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
841 0 /* end of table */
842 };
843 #endif
844
845 static void cy_start(struct tty_struct *);
846 static void set_line_char(struct cyclades_port *);
847 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
848 #ifdef CONFIG_ISA
849 static unsigned detect_isa_irq(void __iomem *);
850 #endif /* CONFIG_ISA */
851
852 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
853
854 #ifndef CONFIG_CYZ_INTR
855 static void cyz_poll(unsigned long);
856
857 /* The Cyclades-Z polling cycle is defined by this variable */
858 static long cyz_polling_cycle = CZ_DEF_POLL;
859
860 static int cyz_timeron = 0;
861 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
862
863 #else /* CONFIG_CYZ_INTR */
864 static void cyz_rx_restart(unsigned long);
865 static struct timer_list cyz_rx_full_timer[NR_PORTS];
866 #endif /* CONFIG_CYZ_INTR */
867
868 static inline int serial_paranoia_check(struct cyclades_port *info,
869 char *name, const char *routine)
870 {
871 #ifdef SERIAL_PARANOIA_CHECK
872 if (!info) {
873 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
874 name, routine);
875 return 1;
876 }
877
878 if ((long)info < (long)(&cy_port[0]) ||
879 (long)(&cy_port[NR_PORTS]) < (long)info) {
880 printk("cyc Warning: cyclades_port out of range for (%s) in "
881 "%s\n", name, routine);
882 return 1;
883 }
884
885 if (info->magic != CYCLADES_MAGIC) {
886 printk("cyc Warning: bad magic number for serial struct (%s) "
887 "in %s\n", name, routine);
888 return 1;
889 }
890 #endif
891 return 0;
892 } /* serial_paranoia_check */
893
894 /*
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
899 */
900 static inline void cy_sched_event(struct cyclades_port *info, int event)
901 {
902 info->event |= 1 << event; /* remember what kind of event and who */
903 schedule_work(&info->tqueue);
904 } /* cy_sched_event */
905
906 /*
907 * This routine is used to handle the "bottom half" processing for the
908 * serial driver, known also the "software interrupt" processing.
909 * This processing is done at the kernel interrupt level, after the
910 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
911 * is where time-consuming activities which can not be done in the
912 * interrupt driver proper are done; the interrupt driver schedules
913 * them using cy_sched_event(), and they get done here.
914 *
915 * This is done through one level of indirection--the task queue.
916 * When a hardware interrupt service routine wants service by the
917 * driver's bottom half, it enqueues the appropriate tq_struct (one
918 * per port) to the keventd work queue and sets a request flag
919 * that the work queue be processed.
920 *
921 * Although this may seem unwieldy, it gives the system a way to
922 * pass an argument (in this case the pointer to the cyclades_port
923 * structure) to the bottom half of the driver. Previous kernels
924 * had to poll every port to see if that port needed servicing.
925 */
926 static void
927 do_softint(struct work_struct *work)
928 {
929 struct cyclades_port *info =
930 container_of(work, struct cyclades_port, tqueue);
931 struct tty_struct *tty;
932
933 tty = info->tty;
934 if (!tty)
935 return;
936
937 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
938 tty_hangup(info->tty);
939 wake_up_interruptible(&info->open_wait);
940 info->flags &= ~ASYNC_NORMAL_ACTIVE;
941 }
942 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
943 wake_up_interruptible(&info->open_wait);
944 #ifdef CONFIG_CYZ_INTR
945 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
946 if (cyz_rx_full_timer[info->line].function == NULL) {
947 cyz_rx_full_timer[info->line].expires = jiffies + 1;
948 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
949 cyz_rx_full_timer[info->line].data =
950 (unsigned long)info;
951 add_timer(&cyz_rx_full_timer[info->line]);
952 }
953 }
954 #endif
955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
957 tty_wakeup(tty);
958 #ifdef Z_WAKE
959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 wake_up_interruptible(&info->shutdown_wait);
961 #endif
962 } /* do_softint */
963
964
965 /***********************************************************/
966 /********* Start of block of Cyclom-Y specific code ********/
967
968 /* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
972
973 This function is only called from inside spinlock-protected code.
974 */
975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
976 {
977 volatile int i;
978
979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
982 break;
983 }
984 udelay(10L);
985 }
986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
988 if (i == 100)
989 return -1;
990
991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
993
994 return 0;
995 } /* cyy_issue_cmd */
996
997 #ifdef CONFIG_ISA
998 /* ISA interrupt detection code */
999 static unsigned detect_isa_irq(void __iomem * address)
1000 {
1001 int irq;
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1005
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1008
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1012
1013 irqs = probe_irq_on();
1014 /* Wait ... */
1015 udelay(5000L);
1016
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 cy_readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1026
1027 /* Wait ... */
1028 udelay(5000L);
1029
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1032
1033 /* Clean up */
1034 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035 save_car = cy_readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1043
1044 return (irq > 0) ? irq : 0;
1045 }
1046 #endif /* CONFIG_ISA */
1047
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049 void __iomem * base_addr, int status, int index)
1050 {
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 volatile int char_count;
1054 int i, j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1056 char data;
1057
1058 if (status & CySRReceive) { /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1061 #endif
1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 i = channel + chip * 4 + cinfo->first_line;
1067 info = &cy_port[i];
1068 info->last_active = jiffies;
1069 save_car = cy_readb(base_addr + (CyCAR << index));
1070 cy_writeb(base_addr + (CyCAR << index), save_xir);
1071
1072 /* if there is nowhere to put the data, discard it */
1073 if (info->tty == 0) {
1074 j = (cy_readb(base_addr + (CyRIVR << index)) &
1075 CyIVRMask);
1076 if (j == CyIVRRxEx) { /* exception */
1077 data = cy_readb(base_addr + (CyRDSR << index));
1078 } else { /* normal character reception */
1079 char_count = cy_readb(base_addr +
1080 (CyRDCR << index));
1081 while (char_count--) {
1082 data = cy_readb(base_addr +
1083 (CyRDSR << index));
1084 }
1085 }
1086 } else { /* there is an open port for this data */
1087 tty = info->tty;
1088 j = (cy_readb(base_addr + (CyRIVR << index)) &
1089 CyIVRMask);
1090 if (j == CyIVRRxEx) { /* exception */
1091 data = cy_readb(base_addr + (CyRDSR << index));
1092
1093 /* For statistics only */
1094 if (data & CyBREAK)
1095 info->icount.brk++;
1096 else if (data & CyFRAME)
1097 info->icount.frame++;
1098 else if (data & CyPARITY)
1099 info->icount.parity++;
1100 else if (data & CyOVERRUN)
1101 info->icount.overrun++;
1102
1103 if (data & info->ignore_status_mask) {
1104 info->icount.rx++;
1105 return;
1106 }
1107 if (tty_buffer_request_room(tty, 1)) {
1108 if (data & info->read_status_mask) {
1109 if (data & CyBREAK) {
1110 tty_insert_flip_char(
1111 tty,
1112 cy_readb(
1113 base_addr +
1114 (CyRDSR <<
1115 index)),
1116 TTY_BREAK);
1117 info->icount.rx++;
1118 if (info->flags &
1119 ASYNC_SAK) {
1120 do_SAK(tty);
1121 }
1122 } else if (data & CyFRAME) {
1123 tty_insert_flip_char(
1124 tty,
1125 cy_readb(
1126 base_addr +
1127 (CyRDSR <<
1128 index)),
1129 TTY_FRAME);
1130 info->icount.rx++;
1131 info->idle_stats.
1132 frame_errs++;
1133 } else if (data & CyPARITY) {
1134 /* Pieces of seven... */
1135 tty_insert_flip_char(
1136 tty,
1137 cy_readb(
1138 base_addr +
1139 (CyRDSR <<
1140 index)),
1141 TTY_PARITY);
1142 info->icount.rx++;
1143 info->idle_stats.
1144 parity_errs++;
1145 } else if (data & CyOVERRUN) {
1146 tty_insert_flip_char(
1147 tty, 0,
1148 TTY_OVERRUN);
1149 info->icount.rx++;
1150 /* If the flip buffer itself is
1151 overflowing, we still lose
1152 the next incoming character.
1153 */
1154 tty_insert_flip_char(
1155 tty,
1156 cy_readb(
1157 base_addr +
1158 (CyRDSR <<
1159 index)),
1160 TTY_FRAME);
1161 info->icount.rx++;
1162 info->idle_stats.
1163 overruns++;
1164 /* These two conditions may imply */
1165 /* a normal read should be done. */
1166 /* }else if(data & CyTIMEOUT){ */
1167 /* }else if(data & CySPECHAR){ */
1168 } else {
1169 tty_insert_flip_char(
1170 tty, 0,
1171 TTY_NORMAL);
1172 info->icount.rx++;
1173 }
1174 } else {
1175 tty_insert_flip_char(tty, 0,
1176 TTY_NORMAL);
1177 info->icount.rx++;
1178 }
1179 } else {
1180 /* there was a software buffer
1181 overrun and nothing could be
1182 done about it!!! */
1183 info->icount.buf_overrun++;
1184 info->idle_stats.overruns++;
1185 }
1186 } else { /* normal character reception */
1187 /* load # chars available from the chip */
1188 char_count = cy_readb(base_addr +
1189 (CyRDCR << index));
1190
1191 #ifdef CY_ENABLE_MONITORING
1192 ++info->mon.int_count;
1193 info->mon.char_count += char_count;
1194 if (char_count > info->mon.char_max)
1195 info->mon.char_max = char_count;
1196 info->mon.char_last = char_count;
1197 #endif
1198 len = tty_buffer_request_room(tty, char_count);
1199 while (len--) {
1200 data = cy_readb(base_addr +
1201 (CyRDSR << index));
1202 tty_insert_flip_char(tty, data,
1203 TTY_NORMAL);
1204 info->idle_stats.recv_bytes++;
1205 info->icount.rx++;
1206 #ifdef CY_16Y_HACK
1207 udelay(10L);
1208 #endif
1209 }
1210 info->idle_stats.recv_idle = jiffies;
1211 }
1212 tty_schedule_flip(tty);
1213 }
1214 /* end of service */
1215 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1216 cy_writeb(base_addr + (CyCAR << index), (save_car));
1217 spin_unlock(&cinfo->card_lock);
1218 }
1219
1220 if (status & CySRTransmit) { /* transmission interrupt */
1221 /* Since we only get here when the transmit buffer
1222 is empty, we know we can always stuff a dozen
1223 characters. */
1224 #ifdef CY_DEBUG_INTERRUPTS
1225 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1226 #endif
1227
1228 /* determine the channel & change to that context */
1229 spin_lock(&cinfo->card_lock);
1230 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1231 channel = (u_short) (save_xir & CyIRChannel);
1232 i = channel + chip * 4 + cinfo->first_line;
1233 save_car = cy_readb(base_addr + (CyCAR << index));
1234 cy_writeb(base_addr + (CyCAR << index), save_xir);
1235
1236 /* validate the port# (as configured and open) */
1237 if ((i < 0) || (NR_PORTS <= i)) {
1238 cy_writeb(base_addr + (CySRER << index),
1239 cy_readb(base_addr + (CySRER << index)) &
1240 ~CyTxRdy);
1241 goto txend;
1242 }
1243 info = &cy_port[i];
1244 info->last_active = jiffies;
1245 if (info->tty == 0) {
1246 cy_writeb(base_addr + (CySRER << index),
1247 cy_readb(base_addr + (CySRER << index)) &
1248 ~CyTxRdy);
1249 goto txdone;
1250 }
1251
1252 /* load the on-chip space for outbound data */
1253 char_count = info->xmit_fifo_size;
1254
1255 if (info->x_char) { /* send special char */
1256 outch = info->x_char;
1257 cy_writeb(base_addr + (CyTDR << index), outch);
1258 char_count--;
1259 info->icount.tx++;
1260 info->x_char = 0;
1261 }
1262
1263 if (info->breakon || info->breakoff) {
1264 if (info->breakon) {
1265 cy_writeb(base_addr + (CyTDR << index), 0);
1266 cy_writeb(base_addr + (CyTDR << index), 0x81);
1267 info->breakon = 0;
1268 char_count -= 2;
1269 }
1270 if (info->breakoff) {
1271 cy_writeb(base_addr + (CyTDR << index), 0);
1272 cy_writeb(base_addr + (CyTDR << index), 0x83);
1273 info->breakoff = 0;
1274 char_count -= 2;
1275 }
1276 }
1277
1278 while (char_count-- > 0) {
1279 if (!info->xmit_cnt) {
1280 if (cy_readb(base_addr + (CySRER << index)) &
1281 CyTxMpty) {
1282 cy_writeb(base_addr + (CySRER << index),
1283 cy_readb(base_addr +
1284 (CySRER << index)) &
1285 ~CyTxMpty);
1286 } else {
1287 cy_writeb(base_addr + (CySRER << index),
1288 (cy_readb(base_addr +
1289 (CySRER << index)) &
1290 ~CyTxRdy) | CyTxMpty);
1291 }
1292 goto txdone;
1293 }
1294 if (info->xmit_buf == 0) {
1295 cy_writeb(base_addr + (CySRER << index),
1296 cy_readb(base_addr + (CySRER << index))&
1297 ~CyTxRdy);
1298 goto txdone;
1299 }
1300 if (info->tty->stopped || info->tty->hw_stopped) {
1301 cy_writeb(base_addr + (CySRER << index),
1302 cy_readb(base_addr + (CySRER << index))&
1303 ~CyTxRdy);
1304 goto txdone;
1305 }
1306 /* Because the Embedded Transmit Commands have
1307 been enabled, we must check to see if the
1308 escape character, NULL, is being sent. If it
1309 is, we must ensure that there is room for it
1310 to be doubled in the output stream. Therefore
1311 we no longer advance the pointer when the
1312 character is fetched, but rather wait until
1313 after the check for a NULL output character.
1314 This is necessary because there may not be
1315 room for the two chars needed to send a NULL.)
1316 */
1317 outch = info->xmit_buf[info->xmit_tail];
1318 if (outch) {
1319 info->xmit_cnt--;
1320 info->xmit_tail = (info->xmit_tail + 1) &
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index), outch);
1323 info->icount.tx++;
1324 } else {
1325 if (char_count > 1) {
1326 info->xmit_cnt--;
1327 info->xmit_tail = (info->xmit_tail + 1)&
1328 (SERIAL_XMIT_SIZE - 1);
1329 cy_writeb(base_addr + (CyTDR << index),
1330 outch);
1331 cy_writeb(base_addr + (CyTDR << index),
1332 0);
1333 info->icount.tx++;
1334 char_count--;
1335 } else {
1336 }
1337 }
1338 }
1339
1340 txdone:
1341 if (info->xmit_cnt < WAKEUP_CHARS) {
1342 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1343 }
1344 txend:
1345 /* end of service */
1346 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1347 cy_writeb(base_addr + (CyCAR << index), (save_car));
1348 spin_unlock(&cinfo->card_lock);
1349 }
1350
1351 if (status & CySRModem) { /* modem interrupt */
1352
1353 /* determine the channel & change to that context */
1354 spin_lock(&cinfo->card_lock);
1355 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1356 channel = (u_short) (save_xir & CyIRChannel);
1357 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1358 info->last_active = jiffies;
1359 save_car = cy_readb(base_addr + (CyCAR << index));
1360 cy_writeb(base_addr + (CyCAR << index), save_xir);
1361
1362 mdm_change = cy_readb(base_addr + (CyMISR << index));
1363 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1364
1365 if (info->tty == 0) { /* no place for data, ignore it */
1366 ;
1367 } else {
1368 if (mdm_change & CyANY_DELTA) {
1369 /* For statistics only */
1370 if (mdm_change & CyDCD)
1371 info->icount.dcd++;
1372 if (mdm_change & CyCTS)
1373 info->icount.cts++;
1374 if (mdm_change & CyDSR)
1375 info->icount.dsr++;
1376 if (mdm_change & CyRI)
1377 info->icount.rng++;
1378
1379 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1380 }
1381
1382 if ((mdm_change & CyDCD) &&
1383 (info->flags & ASYNC_CHECK_CD)) {
1384 if (mdm_status & CyDCD) {
1385 cy_sched_event(info,
1386 Cy_EVENT_OPEN_WAKEUP);
1387 } else {
1388 cy_sched_event(info, Cy_EVENT_HANGUP);
1389 }
1390 }
1391 if ((mdm_change & CyCTS) &&
1392 (info->flags & ASYNC_CTS_FLOW)) {
1393 if (info->tty->hw_stopped) {
1394 if (mdm_status & CyCTS) {
1395 /* cy_start isn't used
1396 because... !!! */
1397 info->tty->hw_stopped = 0;
1398 cy_writeb(base_addr +
1399 (CySRER << index),
1400 cy_readb(base_addr +
1401 (CySRER <<
1402 index))|
1403 CyTxRdy);
1404 cy_sched_event(info,
1405 Cy_EVENT_WRITE_WAKEUP);
1406 }
1407 } else {
1408 if (!(mdm_status & CyCTS)) {
1409 /* cy_stop isn't used
1410 because ... !!! */
1411 info->tty->hw_stopped = 1;
1412 cy_writeb(base_addr +
1413 (CySRER << index),
1414 cy_readb(base_addr +
1415 (CySRER <<
1416 index)) &
1417 ~CyTxRdy);
1418 }
1419 }
1420 }
1421 if (mdm_change & CyDSR) {
1422 }
1423 if (mdm_change & CyRI) {
1424 }
1425 }
1426 /* end of service */
1427 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1428 cy_writeb(base_addr + (CyCAR << index), save_car);
1429 spin_unlock(&cinfo->card_lock);
1430 }
1431 }
1432
1433 /* The real interrupt service routine is called
1434 whenever the card wants its hand held--chars
1435 received, out buffer empty, modem change, etc.
1436 */
1437 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1438 {
1439 int status;
1440 struct cyclades_card *cinfo;
1441 void __iomem *base_addr, *card_base_addr;
1442 int chip;
1443 int index;
1444 int too_many;
1445 int had_work;
1446
1447 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1448 #ifdef CY_DEBUG_INTERRUPTS
1449 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1450 #endif
1451 return IRQ_NONE; /* spurious interrupt */
1452 }
1453
1454 card_base_addr = cinfo->base_addr;
1455 index = cinfo->bus_index;
1456
1457 /* This loop checks all chips in the card. Make a note whenever
1458 _any_ chip had some work to do, as this is considered an
1459 indication that there will be more to do. Only when no chip
1460 has any work does this outermost loop exit.
1461 */
1462 do {
1463 had_work = 0;
1464 for (chip = 0; chip < cinfo->num_chips; chip++) {
1465 base_addr = cinfo->base_addr +
1466 (cy_chip_offset[chip] << index);
1467 too_many = 0;
1468 while ((status = cy_readb(base_addr +
1469 (CySVRR << index))) != 0x00) {
1470 had_work++;
1471 /* The purpose of the following test is to ensure that
1472 no chip can monopolize the driver. This forces the
1473 chips to be checked in a round-robin fashion (after
1474 draining each of a bunch (1000) of characters).
1475 */
1476 if (1000 < too_many++) {
1477 break;
1478 }
1479 cyy_intr_chip(cinfo, chip, base_addr, status,
1480 index);
1481 }
1482 }
1483 } while (had_work);
1484
1485 /* clear interrupts */
1486 spin_lock(&cinfo->card_lock);
1487 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1488 /* Cy_ClrIntr is 0x1800 */
1489 spin_unlock(&cinfo->card_lock);
1490 return IRQ_HANDLED;
1491 } /* cyy_interrupt */
1492
1493 /***********************************************************/
1494 /********* End of block of Cyclom-Y specific code **********/
1495 /******** Start of block of Cyclades-Z specific code *********/
1496 /***********************************************************/
1497
1498 static int
1499 cyz_fetch_msg(struct cyclades_card *cinfo,
1500 uclong * channel, ucchar * cmd, uclong * param)
1501 {
1502 struct FIRM_ID __iomem *firm_id;
1503 struct ZFW_CTRL __iomem *zfw_ctrl;
1504 struct BOARD_CTRL __iomem *board_ctrl;
1505 unsigned long loc_doorbell;
1506
1507 firm_id = cinfo->base_addr + ID_ADDRESS;
1508 if (!ISZLOADED(*cinfo)) {
1509 return -1;
1510 }
1511 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1512 0xfffff);
1513 board_ctrl = &zfw_ctrl->board_ctrl;
1514
1515 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1516 (cinfo->ctl_addr))->loc_doorbell);
1517 if (loc_doorbell) {
1518 *cmd = (char)(0xff & loc_doorbell);
1519 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1520 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1521 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1522 loc_doorbell, 0xffffffff);
1523 return 1;
1524 }
1525 return 0;
1526 } /* cyz_fetch_msg */
1527
1528 static int
1529 cyz_issue_cmd(struct cyclades_card *cinfo,
1530 uclong channel, ucchar cmd, uclong param)
1531 {
1532 struct FIRM_ID __iomem *firm_id;
1533 struct ZFW_CTRL __iomem *zfw_ctrl;
1534 struct BOARD_CTRL __iomem *board_ctrl;
1535 unsigned long __iomem *pci_doorbell;
1536 int index;
1537
1538 firm_id = cinfo->base_addr + ID_ADDRESS;
1539 if (!ISZLOADED(*cinfo)) {
1540 return -1;
1541 }
1542 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1543 0xfffff);
1544 board_ctrl = &zfw_ctrl->board_ctrl;
1545
1546 index = 0;
1547 pci_doorbell =
1548 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1549 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1550 if (index++ == 1000) {
1551 return (int)(cy_readl(pci_doorbell) & 0xff);
1552 }
1553 udelay(50L);
1554 }
1555 cy_writel(&board_ctrl->hcmd_channel, channel);
1556 cy_writel(&board_ctrl->hcmd_param, param);
1557 cy_writel(pci_doorbell, (long)cmd);
1558
1559 return 0;
1560 } /* cyz_issue_cmd */
1561
1562 static void
1563 cyz_handle_rx(struct cyclades_port *info,
1564 volatile struct CH_CTRL __iomem * ch_ctrl,
1565 volatile struct BUF_CTRL __iomem * buf_ctrl)
1566 {
1567 struct cyclades_card *cinfo = &cy_card[info->card];
1568 struct tty_struct *tty = info->tty;
1569 volatile int char_count;
1570 int len;
1571 #ifdef BLOCKMOVE
1572 int small_count;
1573 #else
1574 char data;
1575 #endif
1576 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1577
1578 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1579 rx_put = cy_readl(&buf_ctrl->rx_put);
1580 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1581 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1582 if (rx_put >= rx_get)
1583 char_count = rx_put - rx_get;
1584 else
1585 char_count = rx_put - rx_get + rx_bufsize;
1586
1587 if (char_count) {
1588 info->last_active = jiffies;
1589 info->jiffies[1] = jiffies;
1590
1591 #ifdef CY_ENABLE_MONITORING
1592 info->mon.int_count++;
1593 info->mon.char_count += char_count;
1594 if (char_count > info->mon.char_max)
1595 info->mon.char_max = char_count;
1596 info->mon.char_last = char_count;
1597 #endif
1598 if (tty == 0) {
1599 /* flush received characters */
1600 new_rx_get = (new_rx_get + char_count) &
1601 (rx_bufsize - 1);
1602 info->rflush_count++;
1603 } else {
1604 #ifdef BLOCKMOVE
1605 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1606 for performance, but because of buffer boundaries, there
1607 may be several steps to the operation */
1608 while (0 < (small_count = min_t(unsigned int,
1609 rx_bufsize - new_rx_get,
1610 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1611 tty->flip.count, char_count)))){
1612 memcpy_fromio(tty->flip.char_buf_ptr,
1613 (char *)(cinfo->base_addr + rx_bufaddr +
1614 new_rx_get),
1615 small_count);
1616
1617 tty->flip.char_buf_ptr += small_count;
1618 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1619 small_count);
1620 tty->flip.flag_buf_ptr += small_count;
1621 new_rx_get = (new_rx_get + small_count) &
1622 (rx_bufsize - 1);
1623 char_count -= small_count;
1624 info->icount.rx += small_count;
1625 info->idle_stats.recv_bytes += small_count;
1626 tty->flip.count += small_count;
1627 }
1628 #else
1629 len = tty_buffer_request_room(tty, char_count);
1630 while (len--) {
1631 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1632 new_rx_get);
1633 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1634 tty_insert_flip_char(tty, data, TTY_NORMAL);
1635 info->idle_stats.recv_bytes++;
1636 info->icount.rx++;
1637 }
1638 #endif
1639 #ifdef CONFIG_CYZ_INTR
1640 /* Recalculate the number of chars in the RX buffer and issue
1641 a cmd in case it's higher than the RX high water mark */
1642 rx_put = cy_readl(&buf_ctrl->rx_put);
1643 if (rx_put >= rx_get)
1644 char_count = rx_put - rx_get;
1645 else
1646 char_count = rx_put - rx_get + rx_bufsize;
1647 if (char_count >= (int)cy_readl(&buf_ctrl->
1648 rx_threshold)) {
1649 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1650 }
1651 #endif
1652 info->idle_stats.recv_idle = jiffies;
1653 tty_schedule_flip(tty);
1654 }
1655 /* Update rx_get */
1656 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1657 }
1658 }
1659
1660 static void
1661 cyz_handle_tx(struct cyclades_port *info,
1662 volatile struct CH_CTRL __iomem * ch_ctrl,
1663 volatile struct BUF_CTRL __iomem * buf_ctrl)
1664 {
1665 struct cyclades_card *cinfo = &cy_card[info->card];
1666 struct tty_struct *tty = info->tty;
1667 char data;
1668 volatile int char_count;
1669 #ifdef BLOCKMOVE
1670 int small_count;
1671 #endif
1672 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1673
1674 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1675 return;
1676
1677 tx_get = cy_readl(&buf_ctrl->tx_get);
1678 tx_put = cy_readl(&buf_ctrl->tx_put);
1679 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1680 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1681 if (tx_put >= tx_get)
1682 char_count = tx_get - tx_put - 1 + tx_bufsize;
1683 else
1684 char_count = tx_get - tx_put - 1;
1685
1686 if (char_count) {
1687
1688 if (tty == 0) {
1689 goto ztxdone;
1690 }
1691
1692 if (info->x_char) { /* send special char */
1693 data = info->x_char;
1694
1695 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1696 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1697 info->x_char = 0;
1698 char_count--;
1699 info->icount.tx++;
1700 info->last_active = jiffies;
1701 info->jiffies[2] = jiffies;
1702 }
1703 #ifdef BLOCKMOVE
1704 while (0 < (small_count = min_t(unsigned int,
1705 tx_bufsize - tx_put, min_t(unsigned int,
1706 (SERIAL_XMIT_SIZE - info->xmit_tail),
1707 min_t(unsigned int, info->xmit_cnt,
1708 char_count))))) {
1709
1710 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1711 tx_put),
1712 &info->xmit_buf[info->xmit_tail],
1713 small_count);
1714
1715 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1716 char_count -= small_count;
1717 info->icount.tx += small_count;
1718 info->xmit_cnt -= small_count;
1719 info->xmit_tail = (info->xmit_tail + small_count) &
1720 (SERIAL_XMIT_SIZE - 1);
1721 info->last_active = jiffies;
1722 info->jiffies[2] = jiffies;
1723 }
1724 #else
1725 while (info->xmit_cnt && char_count) {
1726 data = info->xmit_buf[info->xmit_tail];
1727 info->xmit_cnt--;
1728 info->xmit_tail = (info->xmit_tail + 1) &
1729 (SERIAL_XMIT_SIZE - 1);
1730
1731 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1732 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1733 char_count--;
1734 info->icount.tx++;
1735 info->last_active = jiffies;
1736 info->jiffies[2] = jiffies;
1737 }
1738 #endif
1739 ztxdone:
1740 if (info->xmit_cnt < WAKEUP_CHARS) {
1741 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1742 }
1743 /* Update tx_put */
1744 cy_writel(&buf_ctrl->tx_put, tx_put);
1745 }
1746 }
1747
1748 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1749 {
1750 struct tty_struct *tty;
1751 struct cyclades_port *info;
1752 static volatile struct FIRM_ID __iomem *firm_id;
1753 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1754 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1755 static volatile struct CH_CTRL __iomem *ch_ctrl;
1756 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1757 uclong channel;
1758 ucchar cmd;
1759 uclong param;
1760 uclong hw_ver, fw_ver;
1761 int special_count;
1762 int delta_count;
1763
1764 firm_id = cinfo->base_addr + ID_ADDRESS;
1765 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1766 0xfffff);
1767 board_ctrl = &zfw_ctrl->board_ctrl;
1768 fw_ver = cy_readl(&board_ctrl->fw_version);
1769 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1770 mail_box_0);
1771
1772 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1773 special_count = 0;
1774 delta_count = 0;
1775 info = &cy_port[channel + cinfo->first_line];
1776 if ((tty = info->tty) == 0) {
1777 continue;
1778 }
1779 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1780 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1781
1782 switch (cmd) {
1783 case C_CM_PR_ERROR:
1784 tty_insert_flip_char(tty, 0, TTY_PARITY);
1785 info->icount.rx++;
1786 special_count++;
1787 break;
1788 case C_CM_FR_ERROR:
1789 tty_insert_flip_char(tty, 0, TTY_FRAME);
1790 info->icount.rx++;
1791 special_count++;
1792 break;
1793 case C_CM_RXBRK:
1794 tty_insert_flip_char(tty, 0, TTY_BREAK);
1795 info->icount.rx++;
1796 special_count++;
1797 break;
1798 case C_CM_MDCD:
1799 info->icount.dcd++;
1800 delta_count++;
1801 if (info->flags & ASYNC_CHECK_CD) {
1802 if ((fw_ver > 241 ? ((u_long) param) :
1803 cy_readl(&ch_ctrl->rs_status)) &
1804 C_RS_DCD) {
1805 cy_sched_event(info,
1806 Cy_EVENT_OPEN_WAKEUP);
1807 } else {
1808 cy_sched_event(info, Cy_EVENT_HANGUP);
1809 }
1810 }
1811 break;
1812 case C_CM_MCTS:
1813 info->icount.cts++;
1814 delta_count++;
1815 break;
1816 case C_CM_MRI:
1817 info->icount.rng++;
1818 delta_count++;
1819 break;
1820 case C_CM_MDSR:
1821 info->icount.dsr++;
1822 delta_count++;
1823 break;
1824 #ifdef Z_WAKE
1825 case C_CM_IOCTLW:
1826 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1827 break;
1828 #endif
1829 #ifdef CONFIG_CYZ_INTR
1830 case C_CM_RXHIWM:
1831 case C_CM_RXNNDT:
1832 case C_CM_INTBACK2:
1833 /* Reception Interrupt */
1834 #ifdef CY_DEBUG_INTERRUPTS
1835 printk("cyz_interrupt: rcvd intr, card %d, "
1836 "port %ld\n\r", info->card, channel);
1837 #endif
1838 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1839 break;
1840 case C_CM_TXBEMPTY:
1841 case C_CM_TXLOWWM:
1842 case C_CM_INTBACK:
1843 /* Transmission Interrupt */
1844 #ifdef CY_DEBUG_INTERRUPTS
1845 printk("cyz_interrupt: xmit intr, card %d, "
1846 "port %ld\n\r", info->card, channel);
1847 #endif
1848 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1849 break;
1850 #endif /* CONFIG_CYZ_INTR */
1851 case C_CM_FATAL:
1852 /* should do something with this !!! */
1853 break;
1854 default:
1855 break;
1856 }
1857 if (delta_count)
1858 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1859 if (special_count)
1860 tty_schedule_flip(tty);
1861 }
1862 }
1863
1864 #ifdef CONFIG_CYZ_INTR
1865 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1866 {
1867 struct cyclades_card *cinfo;
1868
1869 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1870 #ifdef CY_DEBUG_INTERRUPTS
1871 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1872 #endif
1873 return IRQ_NONE; /* spurious interrupt */
1874 }
1875
1876 if (!ISZLOADED(*cinfo)) {
1877 #ifdef CY_DEBUG_INTERRUPTS
1878 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1879 #endif
1880 return IRQ_NONE;
1881 }
1882
1883 /* Handle the interrupts */
1884 cyz_handle_cmd(cinfo);
1885
1886 return IRQ_HANDLED;
1887 } /* cyz_interrupt */
1888
1889 static void cyz_rx_restart(unsigned long arg)
1890 {
1891 struct cyclades_port *info = (struct cyclades_port *)arg;
1892 int retval;
1893 int card = info->card;
1894 uclong channel = (info->line) - (cy_card[card].first_line);
1895 unsigned long flags;
1896
1897 CY_LOCK(info, flags);
1898 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1899 if (retval != 0) {
1900 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1901 info->line, retval);
1902 }
1903 cyz_rx_full_timer[info->line].function = NULL;
1904 CY_UNLOCK(info, flags);
1905 }
1906
1907 #else /* CONFIG_CYZ_INTR */
1908
1909 static void cyz_poll(unsigned long arg)
1910 {
1911 struct cyclades_card *cinfo;
1912 struct cyclades_port *info;
1913 struct tty_struct *tty;
1914 static volatile struct FIRM_ID *firm_id;
1915 static volatile struct ZFW_CTRL *zfw_ctrl;
1916 static volatile struct BOARD_CTRL *board_ctrl;
1917 static volatile struct CH_CTRL *ch_ctrl;
1918 static volatile struct BUF_CTRL *buf_ctrl;
1919 int card, port;
1920
1921 cyz_timerlist.expires = jiffies + (HZ);
1922 for (card = 0; card < NR_CARDS; card++) {
1923 cinfo = &cy_card[card];
1924
1925 if (!IS_CYC_Z(*cinfo))
1926 continue;
1927 if (!ISZLOADED(*cinfo))
1928 continue;
1929
1930 firm_id = cinfo->base_addr + ID_ADDRESS;
1931 zfw_ctrl = cinfo->base_addr +
1932 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1933 board_ctrl = &(zfw_ctrl->board_ctrl);
1934
1935 /* Skip first polling cycle to avoid racing conditions with the FW */
1936 if (!cinfo->intr_enabled) {
1937 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1938 cinfo->intr_enabled = 1;
1939 continue;
1940 }
1941
1942 cyz_handle_cmd(cinfo);
1943
1944 for (port = 0; port < cinfo->nports; port++) {
1945 info = &cy_port[port + cinfo->first_line];
1946 tty = info->tty;
1947 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1948 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1949
1950 if (!info->throttle)
1951 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1952 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1953 }
1954 /* poll every 'cyz_polling_cycle' period */
1955 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1956 }
1957 add_timer(&cyz_timerlist);
1958 } /* cyz_poll */
1959
1960 #endif /* CONFIG_CYZ_INTR */
1961
1962 /********** End of block of Cyclades-Z specific code *********/
1963 /***********************************************************/
1964
1965 /* This is called whenever a port becomes active;
1966 interrupts are enabled and DTR & RTS are turned on.
1967 */
1968 static int startup(struct cyclades_port *info)
1969 {
1970 unsigned long flags;
1971 int retval = 0;
1972 void __iomem *base_addr;
1973 int card, chip, channel, index;
1974 unsigned long page;
1975
1976 card = info->card;
1977 channel = (info->line) - (cy_card[card].first_line);
1978
1979 page = get_zeroed_page(GFP_KERNEL);
1980 if (!page)
1981 return -ENOMEM;
1982
1983 CY_LOCK(info, flags);
1984
1985 if (info->flags & ASYNC_INITIALIZED) {
1986 free_page(page);
1987 goto errout;
1988 }
1989
1990 if (!info->type) {
1991 if (info->tty) {
1992 set_bit(TTY_IO_ERROR, &info->tty->flags);
1993 }
1994 free_page(page);
1995 goto errout;
1996 }
1997
1998 if (info->xmit_buf)
1999 free_page(page);
2000 else
2001 info->xmit_buf = (unsigned char *)page;
2002
2003 CY_UNLOCK(info, flags);
2004
2005 set_line_char(info);
2006
2007 if (!IS_CYC_Z(cy_card[card])) {
2008 chip = channel >> 2;
2009 channel &= 0x03;
2010 index = cy_card[card].bus_index;
2011 base_addr = cy_card[card].base_addr +
2012 (cy_chip_offset[chip] << index);
2013
2014 #ifdef CY_DEBUG_OPEN
2015 printk("cyc startup card %d, chip %d, channel %d, "
2016 "base_addr %lx\n",
2017 card, chip, channel, (long)base_addr);
2018 /**/
2019 #endif
2020 CY_LOCK(info, flags);
2021
2022 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2023
2024 cy_writeb(base_addr + (CyRTPR << index),
2025 (info->default_timeout ? info->default_timeout : 0x02));
2026 /* 10ms rx timeout */
2027
2028 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2029 index);
2030
2031 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2032 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2033 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2034
2035 #ifdef CY_DEBUG_DTR
2036 printk("cyc:startup raising DTR\n");
2037 printk(" status: 0x%x, 0x%x\n",
2038 cy_readb(base_addr + (CyMSVR1 << index)),
2039 cy_readb(base_addr + (CyMSVR2 << index)));
2040 #endif
2041
2042 cy_writeb(base_addr + (CySRER << index),
2043 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2044 info->flags |= ASYNC_INITIALIZED;
2045
2046 if (info->tty) {
2047 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2048 }
2049 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2050 info->breakon = info->breakoff = 0;
2051 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2052 info->idle_stats.in_use =
2053 info->idle_stats.recv_idle =
2054 info->idle_stats.xmit_idle = jiffies;
2055
2056 CY_UNLOCK(info, flags);
2057
2058 } else {
2059 struct FIRM_ID __iomem *firm_id;
2060 struct ZFW_CTRL __iomem *zfw_ctrl;
2061 struct BOARD_CTRL __iomem *board_ctrl;
2062 struct CH_CTRL __iomem *ch_ctrl;
2063 int retval;
2064
2065 base_addr = cy_card[card].base_addr;
2066
2067 firm_id = base_addr + ID_ADDRESS;
2068 if (!ISZLOADED(cy_card[card])) {
2069 return -ENODEV;
2070 }
2071
2072 zfw_ctrl = cy_card[card].base_addr +
2073 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2074 board_ctrl = &zfw_ctrl->board_ctrl;
2075 ch_ctrl = zfw_ctrl->ch_ctrl;
2076
2077 #ifdef CY_DEBUG_OPEN
2078 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2079 card, channel, (long)base_addr);
2080 /**/
2081 #endif
2082 CY_LOCK(info, flags);
2083
2084 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2085 #ifdef Z_WAKE
2086 #ifdef CONFIG_CYZ_INTR
2087 cy_writel(&ch_ctrl[channel].intr_enable,
2088 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2089 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2090 #else
2091 cy_writel(&ch_ctrl[channel].intr_enable,
2092 C_IN_IOCTLW | C_IN_MDCD);
2093 #endif /* CONFIG_CYZ_INTR */
2094 #else
2095 #ifdef CONFIG_CYZ_INTR
2096 cy_writel(&ch_ctrl[channel].intr_enable,
2097 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2098 C_IN_RXNNDT | C_IN_MDCD);
2099 #else
2100 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2101 #endif /* CONFIG_CYZ_INTR */
2102 #endif /* Z_WAKE */
2103
2104 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2105 if (retval != 0) {
2106 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2107 info->line, retval);
2108 }
2109
2110 /* Flush RX buffers before raising DTR and RTS */
2111 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2112 0L);
2113 if (retval != 0) {
2114 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2115 info->line, retval);
2116 }
2117
2118 /* set timeout !!! */
2119 /* set RTS and DTR !!! */
2120 cy_writel(&ch_ctrl[channel].rs_control,
2121 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2122 C_RS_DTR);
2123 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2124 C_CM_IOCTLM, 0L);
2125 if (retval != 0) {
2126 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2127 info->line, retval);
2128 }
2129 #ifdef CY_DEBUG_DTR
2130 printk("cyc:startup raising Z DTR\n");
2131 #endif
2132
2133 /* enable send, recv, modem !!! */
2134
2135 info->flags |= ASYNC_INITIALIZED;
2136 if (info->tty) {
2137 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2138 }
2139 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2140 info->breakon = info->breakoff = 0;
2141 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2142 info->idle_stats.in_use =
2143 info->idle_stats.recv_idle =
2144 info->idle_stats.xmit_idle = jiffies;
2145
2146 CY_UNLOCK(info, flags);
2147 }
2148
2149 #ifdef CY_DEBUG_OPEN
2150 printk(" cyc startup done\n");
2151 #endif
2152 return 0;
2153
2154 errout:
2155 CY_UNLOCK(info, flags);
2156 return retval;
2157 } /* startup */
2158
2159 static void start_xmit(struct cyclades_port *info)
2160 {
2161 unsigned long flags;
2162 void __iomem *base_addr;
2163 int card, chip, channel, index;
2164
2165 card = info->card;
2166 channel = (info->line) - (cy_card[card].first_line);
2167 if (!IS_CYC_Z(cy_card[card])) {
2168 chip = channel >> 2;
2169 channel &= 0x03;
2170 index = cy_card[card].bus_index;
2171 base_addr = cy_card[card].base_addr +
2172 (cy_chip_offset[chip] << index);
2173
2174 CY_LOCK(info, flags);
2175 cy_writeb(base_addr + (CyCAR << index), channel);
2176 cy_writeb(base_addr + (CySRER << index),
2177 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2178 CY_UNLOCK(info, flags);
2179 } else {
2180 #ifdef CONFIG_CYZ_INTR
2181 int retval;
2182
2183 CY_LOCK(info, flags);
2184 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2185 0L);
2186 if (retval != 0) {
2187 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2188 info->line, retval);
2189 }
2190 CY_UNLOCK(info, flags);
2191 #else /* CONFIG_CYZ_INTR */
2192 /* Don't have to do anything at this time */
2193 #endif /* CONFIG_CYZ_INTR */
2194 }
2195 } /* start_xmit */
2196
2197 /*
2198 * This routine shuts down a serial port; interrupts are disabled,
2199 * and DTR is dropped if the hangup on close termio flag is on.
2200 */
2201 static void shutdown(struct cyclades_port *info)
2202 {
2203 unsigned long flags;
2204 void __iomem *base_addr;
2205 int card, chip, channel, index;
2206
2207 if (!(info->flags & ASYNC_INITIALIZED)) {
2208 return;
2209 }
2210
2211 card = info->card;
2212 channel = info->line - cy_card[card].first_line;
2213 if (!IS_CYC_Z(cy_card[card])) {
2214 chip = channel >> 2;
2215 channel &= 0x03;
2216 index = cy_card[card].bus_index;
2217 base_addr = cy_card[card].base_addr +
2218 (cy_chip_offset[chip] << index);
2219
2220 #ifdef CY_DEBUG_OPEN
2221 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2222 "base_addr %lx\n",
2223 card, chip, channel, (long)base_addr);
2224 #endif
2225
2226 CY_LOCK(info, flags);
2227
2228 /* Clear delta_msr_wait queue to avoid mem leaks. */
2229 wake_up_interruptible(&info->delta_msr_wait);
2230
2231 if (info->xmit_buf) {
2232 unsigned char *temp;
2233 temp = info->xmit_buf;
2234 info->xmit_buf = NULL;
2235 free_page((unsigned long)temp);
2236 }
2237 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2238 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2239 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2240 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2241 #ifdef CY_DEBUG_DTR
2242 printk("cyc shutdown dropping DTR\n");
2243 printk(" status: 0x%x, 0x%x\n",
2244 cy_readb(base_addr + (CyMSVR1 << index)),
2245 cy_readb(base_addr + (CyMSVR2 << index)));
2246 #endif
2247 }
2248 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2249 /* it may be appropriate to clear _XMIT at
2250 some later date (after testing)!!! */
2251
2252 if (info->tty) {
2253 set_bit(TTY_IO_ERROR, &info->tty->flags);
2254 }
2255 info->flags &= ~ASYNC_INITIALIZED;
2256 CY_UNLOCK(info, flags);
2257 } else {
2258 struct FIRM_ID __iomem *firm_id;
2259 struct ZFW_CTRL __iomem *zfw_ctrl;
2260 struct BOARD_CTRL __iomem *board_ctrl;
2261 struct CH_CTRL __iomem *ch_ctrl;
2262 int retval;
2263
2264 base_addr = cy_card[card].base_addr;
2265 #ifdef CY_DEBUG_OPEN
2266 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2267 card, channel, (long)base_addr);
2268 #endif
2269
2270 firm_id = base_addr + ID_ADDRESS;
2271 if (!ISZLOADED(cy_card[card])) {
2272 return;
2273 }
2274
2275 zfw_ctrl = cy_card[card].base_addr +
2276 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2277 board_ctrl = &zfw_ctrl->board_ctrl;
2278 ch_ctrl = zfw_ctrl->ch_ctrl;
2279
2280 CY_LOCK(info, flags);
2281
2282 if (info->xmit_buf) {
2283 unsigned char *temp;
2284 temp = info->xmit_buf;
2285 info->xmit_buf = NULL;
2286 free_page((unsigned long)temp);
2287 }
2288
2289 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2290 cy_writel(&ch_ctrl[channel].rs_control,
2291 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2292 ~(C_RS_RTS | C_RS_DTR)));
2293 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2294 C_CM_IOCTLM, 0L);
2295 if (retval != 0) {
2296 printk("cyc:shutdown retval on ttyC%d was %x\n",
2297 info->line, retval);
2298 }
2299 #ifdef CY_DEBUG_DTR
2300 printk("cyc:shutdown dropping Z DTR\n");
2301 #endif
2302 }
2303
2304 if (info->tty) {
2305 set_bit(TTY_IO_ERROR, &info->tty->flags);
2306 }
2307 info->flags &= ~ASYNC_INITIALIZED;
2308
2309 CY_UNLOCK(info, flags);
2310 }
2311
2312 #ifdef CY_DEBUG_OPEN
2313 printk(" cyc shutdown done\n");
2314 #endif
2315 } /* shutdown */
2316
2317 /*
2318 * ------------------------------------------------------------
2319 * cy_open() and friends
2320 * ------------------------------------------------------------
2321 */
2322
2323 static int
2324 block_til_ready(struct tty_struct *tty, struct file *filp,
2325 struct cyclades_port *info)
2326 {
2327 DECLARE_WAITQUEUE(wait, current);
2328 struct cyclades_card *cinfo;
2329 unsigned long flags;
2330 int chip, channel, index;
2331 int retval;
2332 void __iomem *base_addr;
2333
2334 cinfo = &cy_card[info->card];
2335 channel = info->line - cinfo->first_line;
2336
2337 /*
2338 * If the device is in the middle of being closed, then block
2339 * until it's done, and then try again.
2340 */
2341 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2342 if (info->flags & ASYNC_CLOSING) {
2343 interruptible_sleep_on(&info->close_wait);
2344 }
2345 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2346 }
2347
2348 /*
2349 * If non-blocking mode is set, then make the check up front
2350 * and then exit.
2351 */
2352 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2353 info->flags |= ASYNC_NORMAL_ACTIVE;
2354 return 0;
2355 }
2356
2357 /*
2358 * Block waiting for the carrier detect and the line to become
2359 * free (i.e., not in use by the callout). While we are in
2360 * this loop, info->count is dropped by one, so that
2361 * cy_close() knows when to free things. We restore it upon
2362 * exit, either normal or abnormal.
2363 */
2364 retval = 0;
2365 add_wait_queue(&info->open_wait, &wait);
2366 #ifdef CY_DEBUG_OPEN
2367 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2368 info->line, info->count);
2369 /**/
2370 #endif
2371 CY_LOCK(info, flags);
2372 if (!tty_hung_up_p(filp))
2373 info->count--;
2374 CY_UNLOCK(info, flags);
2375 #ifdef CY_DEBUG_COUNT
2376 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2377 current->pid, info->count);
2378 #endif
2379 info->blocked_open++;
2380
2381 if (!IS_CYC_Z(*cinfo)) {
2382 chip = channel >> 2;
2383 channel &= 0x03;
2384 index = cinfo->bus_index;
2385 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2386
2387 while (1) {
2388 CY_LOCK(info, flags);
2389 if ((tty->termios->c_cflag & CBAUD)) {
2390 cy_writeb(base_addr + (CyCAR << index),
2391 (u_char) channel);
2392 cy_writeb(base_addr + (CyMSVR1 << index),
2393 CyRTS);
2394 cy_writeb(base_addr + (CyMSVR2 << index),
2395 CyDTR);
2396 #ifdef CY_DEBUG_DTR
2397 printk("cyc:block_til_ready raising DTR\n");
2398 printk(" status: 0x%x, 0x%x\n",
2399 cy_readb(base_addr +
2400 (CyMSVR1 << index)),
2401 cy_readb(base_addr +
2402 (CyMSVR2 << index)));
2403 #endif
2404 }
2405 CY_UNLOCK(info, flags);
2406
2407 set_current_state(TASK_INTERRUPTIBLE);
2408 if (tty_hung_up_p(filp) ||
2409 !(info->flags & ASYNC_INITIALIZED)) {
2410 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2411 -EAGAIN : -ERESTARTSYS);
2412 break;
2413 }
2414
2415 CY_LOCK(info, flags);
2416 cy_writeb(base_addr + (CyCAR << index),
2417 (u_char) channel);
2418 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2419 (cy_readb(base_addr +
2420 (CyMSVR1 << index)) & CyDCD))) {
2421 CY_UNLOCK(info, flags);
2422 break;
2423 }
2424 CY_UNLOCK(info, flags);
2425
2426 if (signal_pending(current)) {
2427 retval = -ERESTARTSYS;
2428 break;
2429 }
2430 #ifdef CY_DEBUG_OPEN
2431 printk("cyc block_til_ready blocking: ttyC%d, "
2432 "count = %d\n",
2433 info->line, info->count);
2434 /**/
2435 #endif
2436 schedule();
2437 }
2438 } else {
2439 struct FIRM_ID __iomem *firm_id;
2440 struct ZFW_CTRL __iomem *zfw_ctrl;
2441 struct BOARD_CTRL __iomem *board_ctrl;
2442 struct CH_CTRL __iomem *ch_ctrl;
2443 int retval;
2444
2445 base_addr = cinfo->base_addr;
2446 firm_id = base_addr + ID_ADDRESS;
2447 if (!ISZLOADED(*cinfo)) {
2448 current->state = TASK_RUNNING;
2449 remove_wait_queue(&info->open_wait, &wait);
2450 return -EINVAL;
2451 }
2452
2453 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2454 0xfffff);
2455 board_ctrl = &zfw_ctrl->board_ctrl;
2456 ch_ctrl = zfw_ctrl->ch_ctrl;
2457
2458 while (1) {
2459 if ((tty->termios->c_cflag & CBAUD)) {
2460 cy_writel(&ch_ctrl[channel].rs_control,
2461 cy_readl(&ch_ctrl[channel].
2462 rs_control) | (C_RS_RTS |
2463 C_RS_DTR));
2464 retval = cyz_issue_cmd(&cy_card[info->card],
2465 channel, C_CM_IOCTLM, 0L);
2466 if (retval != 0) {
2467 printk("cyc:block_til_ready retval on "
2468 "ttyC%d was %x\n",
2469 info->line, retval);
2470 }
2471 #ifdef CY_DEBUG_DTR
2472 printk("cyc:block_til_ready raising Z DTR\n");
2473 #endif
2474 }
2475
2476 set_current_state(TASK_INTERRUPTIBLE);
2477 if (tty_hung_up_p(filp) ||
2478 !(info->flags & ASYNC_INITIALIZED)) {
2479 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2480 -EAGAIN : -ERESTARTSYS);
2481 break;
2482 }
2483 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2484 (cy_readl(&ch_ctrl[channel].rs_status) &
2485 C_RS_DCD))) {
2486 break;
2487 }
2488 if (signal_pending(current)) {
2489 retval = -ERESTARTSYS;
2490 break;
2491 }
2492 #ifdef CY_DEBUG_OPEN
2493 printk("cyc block_til_ready blocking: ttyC%d, "
2494 "count = %d\n",
2495 info->line, info->count);
2496 /**/
2497 #endif
2498 schedule();
2499 }
2500 }
2501 current->state = TASK_RUNNING;
2502 remove_wait_queue(&info->open_wait, &wait);
2503 if (!tty_hung_up_p(filp)) {
2504 info->count++;
2505 #ifdef CY_DEBUG_COUNT
2506 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2507 current->pid, info->count);
2508 #endif
2509 }
2510 info->blocked_open--;
2511 #ifdef CY_DEBUG_OPEN
2512 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2513 info->line, info->count);
2514 /**/
2515 #endif
2516 if (retval)
2517 return retval;
2518 info->flags |= ASYNC_NORMAL_ACTIVE;
2519 return 0;
2520 } /* block_til_ready */
2521
2522 /*
2523 * This routine is called whenever a serial port is opened. It
2524 * performs the serial-specific initialization for the tty structure.
2525 */
2526 static int cy_open(struct tty_struct *tty, struct file *filp)
2527 {
2528 struct cyclades_port *info;
2529 int retval, line;
2530
2531 line = tty->index;
2532 if ((line < 0) || (NR_PORTS <= line)) {
2533 return -ENODEV;
2534 }
2535 info = &cy_port[line];
2536 if (info->line < 0) {
2537 return -ENODEV;
2538 }
2539
2540 /* If the card's firmware hasn't been loaded,
2541 treat it as absent from the system. This
2542 will make the user pay attention.
2543 */
2544 if (IS_CYC_Z(cy_card[info->card])) {
2545 struct cyclades_card *cinfo = &cy_card[info->card];
2546 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2547
2548 if (!ISZLOADED(*cinfo)) {
2549 if (((ZE_V1 == cy_readl(
2550 &((struct RUNTIME_9060 __iomem *)
2551 (cinfo->ctl_addr))->mail_box_0)) &&
2552 Z_FPGA_CHECK(*cinfo)) &&
2553 (ZFIRM_HLT == cy_readl(
2554 &firm_id->signature))) {
2555 printk("cyc:Cyclades-Z Error: you need an "
2556 "external power supply for this number "
2557 "of ports.\n\rFirmware halted.\r\n");
2558 } else {
2559 printk("cyc:Cyclades-Z firmware not yet "
2560 "loaded\n");
2561 }
2562 return -ENODEV;
2563 }
2564 #ifdef CONFIG_CYZ_INTR
2565 else {
2566 /* In case this Z board is operating in interrupt mode, its
2567 interrupts should be enabled as soon as the first open
2568 happens to one of its ports. */
2569 if (!cinfo->intr_enabled) {
2570 struct ZFW_CTRL __iomem *zfw_ctrl;
2571 struct BOARD_CTRL __iomem *board_ctrl;
2572
2573 zfw_ctrl = cinfo->base_addr +
2574 (cy_readl(&firm_id->zfwctrl_addr) &
2575 0xfffff);
2576
2577 board_ctrl = &zfw_ctrl->board_ctrl;
2578
2579 /* Enable interrupts on the PLX chip */
2580 cy_writew(cinfo->ctl_addr + 0x68,
2581 cy_readw(cinfo->ctl_addr +
2582 0x68) | 0x0900);
2583 /* Enable interrupts on the FW */
2584 retval = cyz_issue_cmd(cinfo, 0,
2585 C_CM_IRQ_ENBL, 0L);
2586 if (retval != 0) {
2587 printk("cyc:IRQ enable retval was %x\n",
2588 retval);
2589 }
2590 cinfo->nports =
2591 (int)cy_readl(&board_ctrl->n_channel);
2592 cinfo->intr_enabled = 1;
2593 }
2594 }
2595 #endif /* CONFIG_CYZ_INTR */
2596 /* Make sure this Z port really exists in hardware */
2597 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2598 return -ENODEV;
2599 }
2600 #ifdef CY_DEBUG_OTHER
2601 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2602 #endif
2603 tty->driver_data = info;
2604 info->tty = tty;
2605 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2606 return -ENODEV;
2607 }
2608 #ifdef CY_DEBUG_OPEN
2609 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2610 /**/
2611 #endif
2612 info->count++;
2613 #ifdef CY_DEBUG_COUNT
2614 printk("cyc:cy_open (%d): incrementing count to %d\n",
2615 current->pid, info->count);
2616 #endif
2617
2618 /*
2619 * If the port is the middle of closing, bail out now
2620 */
2621 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2622 if (info->flags & ASYNC_CLOSING)
2623 interruptible_sleep_on(&info->close_wait);
2624 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2625 }
2626
2627 /*
2628 * Start up serial port
2629 */
2630 retval = startup(info);
2631 if (retval) {
2632 return retval;
2633 }
2634
2635 retval = block_til_ready(tty, filp, info);
2636 if (retval) {
2637 #ifdef CY_DEBUG_OPEN
2638 printk("cyc:cy_open returning after block_til_ready with %d\n",
2639 retval);
2640 #endif
2641 return retval;
2642 }
2643
2644 info->throttle = 0;
2645
2646 #ifdef CY_DEBUG_OPEN
2647 printk(" cyc:cy_open done\n");
2648 /**/
2649 #endif
2650 return 0;
2651 } /* cy_open */
2652
2653 /*
2654 * cy_wait_until_sent() --- wait until the transmitter is empty
2655 */
2656 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2657 {
2658 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2659 void __iomem *base_addr;
2660 int card, chip, channel, index;
2661 unsigned long orig_jiffies;
2662 int char_time;
2663
2664 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2665 return;
2666
2667 if (info->xmit_fifo_size == 0)
2668 return; /* Just in case.... */
2669
2670 orig_jiffies = jiffies;
2671 /*
2672 * Set the check interval to be 1/5 of the estimated time to
2673 * send a single character, and make it at least 1. The check
2674 * interval should also be less than the timeout.
2675 *
2676 * Note: we have to use pretty tight timings here to satisfy
2677 * the NIST-PCTS.
2678 */
2679 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2680 char_time = char_time / 5;
2681 if (char_time <= 0)
2682 char_time = 1;
2683 if (timeout < 0)
2684 timeout = 0;
2685 if (timeout)
2686 char_time = min(char_time, timeout);
2687 /*
2688 * If the transmitter hasn't cleared in twice the approximate
2689 * amount of time to send the entire FIFO, it probably won't
2690 * ever clear. This assumes the UART isn't doing flow
2691 * control, which is currently the case. Hence, if it ever
2692 * takes longer than info->timeout, this is probably due to a
2693 * UART bug of some kind. So, we clamp the timeout parameter at
2694 * 2*info->timeout.
2695 */
2696 if (!timeout || timeout > 2 * info->timeout)
2697 timeout = 2 * info->timeout;
2698 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2699 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2700 printk("jiff=%lu...", jiffies);
2701 #endif
2702 card = info->card;
2703 channel = (info->line) - (cy_card[card].first_line);
2704 if (!IS_CYC_Z(cy_card[card])) {
2705 chip = channel >> 2;
2706 channel &= 0x03;
2707 index = cy_card[card].bus_index;
2708 base_addr =
2709 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2710 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
2711 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2712 printk("Not clean (jiff=%lu)...", jiffies);
2713 #endif
2714 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2715 break;
2716 if (timeout && time_after(jiffies, orig_jiffies +
2717 timeout))
2718 break;
2719 }
2720 } else {
2721 /* Nothing to do! */
2722 }
2723 /* Run one more char cycle */
2724 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2725 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2726 printk("Clean (jiff=%lu)...done\n", jiffies);
2727 #endif
2728 }
2729
2730 /*
2731 * This routine is called when a particular tty device is closed.
2732 */
2733 static void cy_close(struct tty_struct *tty, struct file *filp)
2734 {
2735 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2736 unsigned long flags;
2737
2738 #ifdef CY_DEBUG_OTHER
2739 printk("cyc:cy_close ttyC%d\n", info->line);
2740 #endif
2741
2742 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2743 return;
2744 }
2745
2746 CY_LOCK(info, flags);
2747 /* If the TTY is being hung up, nothing to do */
2748 if (tty_hung_up_p(filp)) {
2749 CY_UNLOCK(info, flags);
2750 return;
2751 }
2752 #ifdef CY_DEBUG_OPEN
2753 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2754 #endif
2755 if ((tty->count == 1) && (info->count != 1)) {
2756 /*
2757 * Uh, oh. tty->count is 1, which means that the tty
2758 * structure will be freed. Info->count should always
2759 * be one in these conditions. If it's greater than
2760 * one, we've got real problems, since it means the
2761 * serial port won't be shutdown.
2762 */
2763 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2764 "info->count is %d\n", info->count);
2765 info->count = 1;
2766 }
2767 #ifdef CY_DEBUG_COUNT
2768 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2769 current->pid, info->count - 1);
2770 #endif
2771 if (--info->count < 0) {
2772 #ifdef CY_DEBUG_COUNT
2773 printk("cyc:cyc_close setting count to 0\n");
2774 #endif
2775 info->count = 0;
2776 }
2777 if (info->count) {
2778 CY_UNLOCK(info, flags);
2779 return;
2780 }
2781 info->flags |= ASYNC_CLOSING;
2782
2783 /*
2784 * Now we wait for the transmit buffer to clear; and we notify
2785 * the line discipline to only process XON/XOFF characters.
2786 */
2787 tty->closing = 1;
2788 CY_UNLOCK(info, flags);
2789 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2790 tty_wait_until_sent(tty, info->closing_wait);
2791 }
2792 CY_LOCK(info, flags);
2793
2794 if (!IS_CYC_Z(cy_card[info->card])) {
2795 int channel = info->line - cy_card[info->card].first_line;
2796 int index = cy_card[info->card].bus_index;
2797 void __iomem *base_addr = cy_card[info->card].base_addr +
2798 (cy_chip_offset[channel >> 2] << index);
2799 /* Stop accepting input */
2800 channel &= 0x03;
2801 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2802 cy_writeb(base_addr + (CySRER << index),
2803 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2804 if (info->flags & ASYNC_INITIALIZED) {
2805 /* Waiting for on-board buffers to be empty before closing
2806 the port */
2807 CY_UNLOCK(info, flags);
2808 cy_wait_until_sent(tty, info->timeout);
2809 CY_LOCK(info, flags);
2810 }
2811 } else {
2812 #ifdef Z_WAKE
2813 /* Waiting for on-board buffers to be empty before closing the port */
2814 void __iomem *base_addr = cy_card[info->card].base_addr;
2815 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2816 struct ZFW_CTRL __iomem *zfw_ctrl =
2817 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2818 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2819 int channel = info->line - cy_card[info->card].first_line;
2820 int retval;
2821
2822 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2823 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2824 C_CM_IOCTLW, 0L);
2825 if (retval != 0) {
2826 printk("cyc:cy_close retval on ttyC%d was %x\n",
2827 info->line, retval);
2828 }
2829 CY_UNLOCK(info, flags);
2830 interruptible_sleep_on(&info->shutdown_wait);
2831 CY_LOCK(info, flags);
2832 }
2833 #endif
2834 }
2835
2836 CY_UNLOCK(info, flags);
2837 shutdown(info);
2838 if (tty->driver->flush_buffer)
2839 tty->driver->flush_buffer(tty);
2840 tty_ldisc_flush(tty);
2841 CY_LOCK(info, flags);
2842
2843 tty->closing = 0;
2844 info->event = 0;
2845 info->tty = NULL;
2846 if (info->blocked_open) {
2847 CY_UNLOCK(info, flags);
2848 if (info->close_delay) {
2849 msleep_interruptible(jiffies_to_msecs
2850 (info->close_delay));
2851 }
2852 wake_up_interruptible(&info->open_wait);
2853 CY_LOCK(info, flags);
2854 }
2855 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2856 wake_up_interruptible(&info->close_wait);
2857
2858 #ifdef CY_DEBUG_OTHER
2859 printk(" cyc:cy_close done\n");
2860 #endif
2861
2862 CY_UNLOCK(info, flags);
2863 } /* cy_close */
2864
2865 /* This routine gets called when tty_write has put something into
2866 * the write_queue. The characters may come from user space or
2867 * kernel space.
2868 *
2869 * This routine will return the number of characters actually
2870 * accepted for writing.
2871 *
2872 * If the port is not already transmitting stuff, start it off by
2873 * enabling interrupts. The interrupt service routine will then
2874 * ensure that the characters are sent.
2875 * If the port is already active, there is no need to kick it.
2876 *
2877 */
2878 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2879 {
2880 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2881 unsigned long flags;
2882 int c, ret = 0;
2883
2884 #ifdef CY_DEBUG_IO
2885 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2886 #endif
2887
2888 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2889 return 0;
2890 }
2891
2892 if (!info->xmit_buf)
2893 return 0;
2894
2895 CY_LOCK(info, flags);
2896 while (1) {
2897 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2898 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2899
2900 if (c <= 0)
2901 break;
2902
2903 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2904 info->xmit_head = (info->xmit_head + c) &
2905 (SERIAL_XMIT_SIZE - 1);
2906 info->xmit_cnt += c;
2907 buf += c;
2908 count -= c;
2909 ret += c;
2910 }
2911 CY_UNLOCK(info, flags);
2912
2913 info->idle_stats.xmit_bytes += ret;
2914 info->idle_stats.xmit_idle = jiffies;
2915
2916 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2917 start_xmit(info);
2918 }
2919 return ret;
2920 } /* cy_write */
2921
2922 /*
2923 * This routine is called by the kernel to write a single
2924 * character to the tty device. If the kernel uses this routine,
2925 * it must call the flush_chars() routine (if defined) when it is
2926 * done stuffing characters into the driver. If there is no room
2927 * in the queue, the character is ignored.
2928 */
2929 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2930 {
2931 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2932 unsigned long flags;
2933
2934 #ifdef CY_DEBUG_IO
2935 printk("cyc:cy_put_char ttyC%d\n", info->line);
2936 #endif
2937
2938 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2939 return;
2940
2941 if (!info->xmit_buf)
2942 return;
2943
2944 CY_LOCK(info, flags);
2945 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2946 CY_UNLOCK(info, flags);
2947 return;
2948 }
2949
2950 info->xmit_buf[info->xmit_head++] = ch;
2951 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2952 info->xmit_cnt++;
2953 info->idle_stats.xmit_bytes++;
2954 info->idle_stats.xmit_idle = jiffies;
2955 CY_UNLOCK(info, flags);
2956 } /* cy_put_char */
2957
2958 /*
2959 * This routine is called by the kernel after it has written a
2960 * series of characters to the tty device using put_char().
2961 */
2962 static void cy_flush_chars(struct tty_struct *tty)
2963 {
2964 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2965
2966 #ifdef CY_DEBUG_IO
2967 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2968 #endif
2969
2970 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2971 return;
2972
2973 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2974 !info->xmit_buf)
2975 return;
2976
2977 start_xmit(info);
2978 } /* cy_flush_chars */
2979
2980 /*
2981 * This routine returns the numbers of characters the tty driver
2982 * will accept for queuing to be written. This number is subject
2983 * to change as output buffers get emptied, or if the output flow
2984 * control is activated.
2985 */
2986 static int cy_write_room(struct tty_struct *tty)
2987 {
2988 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2989 int ret;
2990
2991 #ifdef CY_DEBUG_IO
2992 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2993 #endif
2994
2995 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2996 return 0;
2997 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2998 if (ret < 0)
2999 ret = 0;
3000 return ret;
3001 } /* cy_write_room */
3002
3003 static int cy_chars_in_buffer(struct tty_struct *tty)
3004 {
3005 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3006 int card, channel;
3007
3008 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3009 return 0;
3010
3011 card = info->card;
3012 channel = (info->line) - (cy_card[card].first_line);
3013
3014 #ifdef Z_EXT_CHARS_IN_BUFFER
3015 if (!IS_CYC_Z(cy_card[card])) {
3016 #endif /* Z_EXT_CHARS_IN_BUFFER */
3017 #ifdef CY_DEBUG_IO
3018 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3019 #endif
3020 return info->xmit_cnt;
3021 #ifdef Z_EXT_CHARS_IN_BUFFER
3022 } else {
3023 static volatile struct FIRM_ID *firm_id;
3024 static volatile struct ZFW_CTRL *zfw_ctrl;
3025 static volatile struct CH_CTRL *ch_ctrl;
3026 static volatile struct BUF_CTRL *buf_ctrl;
3027 int char_count;
3028 volatile uclong tx_put, tx_get, tx_bufsize;
3029
3030 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3031 zfw_ctrl = cy_card[card].base_addr +
3032 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3033 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3034 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3035
3036 tx_get = cy_readl(&buf_ctrl->tx_get);
3037 tx_put = cy_readl(&buf_ctrl->tx_put);
3038 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3039 if (tx_put >= tx_get)
3040 char_count = tx_put - tx_get;
3041 else
3042 char_count = tx_put - tx_get + tx_bufsize;
3043 #ifdef CY_DEBUG_IO
3044 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3045 #endif
3046 return info->xmit_cnt + char_count;
3047 }
3048 #endif /* Z_EXT_CHARS_IN_BUFFER */
3049 } /* cy_chars_in_buffer */
3050
3051 /*
3052 * ------------------------------------------------------------
3053 * cy_ioctl() and friends
3054 * ------------------------------------------------------------
3055 */
3056
3057 static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
3058 {
3059 int co, co_val, bpr;
3060 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3061 25000000);
3062
3063 if (baud == 0) {
3064 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3065 return;
3066 }
3067
3068 /* determine which prescaler to use */
3069 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3070 if (cy_clock / co_val / baud > 63)
3071 break;
3072 }
3073
3074 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3075 if (bpr > 255)
3076 bpr = 255;
3077
3078 info->tbpr = info->rbpr = bpr;
3079 info->tco = info->rco = co;
3080 }
3081
3082 /*
3083 * This routine finds or computes the various line characteristics.
3084 * It used to be called config_setup
3085 */
3086 static void set_line_char(struct cyclades_port *info)
3087 {
3088 unsigned long flags;
3089 void __iomem *base_addr;
3090 int card, chip, channel, index;
3091 unsigned cflag, iflag;
3092 unsigned short chip_number;
3093 int baud, baud_rate = 0;
3094 int i;
3095
3096 if (!info->tty || !info->tty->termios) {
3097 return;
3098 }
3099 if (info->line == -1) {
3100 return;
3101 }
3102 cflag = info->tty->termios->c_cflag;
3103 iflag = info->tty->termios->c_iflag;
3104
3105 /*
3106 * Set up the tty->alt_speed kludge
3107 */
3108 if (info->tty) {
3109 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3110 info->tty->alt_speed = 57600;
3111 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3112 info->tty->alt_speed = 115200;
3113 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3114 info->tty->alt_speed = 230400;
3115 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3116 info->tty->alt_speed = 460800;
3117 }
3118
3119 card = info->card;
3120 channel = (info->line) - (cy_card[card].first_line);
3121 chip_number = channel / 4;
3122
3123 if (!IS_CYC_Z(cy_card[card])) {
3124
3125 index = cy_card[card].bus_index;
3126
3127 /* baud rate */
3128 baud = tty_get_baud_rate(info->tty);
3129 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130 ASYNC_SPD_CUST) {
3131 if (info->custom_divisor)
3132 baud_rate = info->baud / info->custom_divisor;
3133 else
3134 baud_rate = info->baud;
3135 } else if (baud > CD1400_MAX_SPEED) {
3136 baud = CD1400_MAX_SPEED;
3137 }
3138 /* find the baud index */
3139 for (i = 0; i < 20; i++) {
3140 if (baud == baud_table[i]) {
3141 break;
3142 }
3143 }
3144 if (i == 20) {
3145 i = 19; /* CD1400_MAX_SPEED */
3146 }
3147
3148 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3149 ASYNC_SPD_CUST) {
3150 cyy_baud_calc(info, baud_rate);
3151 } else {
3152 if (info->chip_rev >= CD1400_REV_J) {
3153 /* It is a CD1400 rev. J or later */
3154 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3155 info->tco = baud_co_60[i]; /* Tx CO */
3156 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3157 info->rco = baud_co_60[i]; /* Rx CO */
3158 } else {
3159 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3160 info->tco = baud_co_25[i]; /* Tx CO */
3161 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3162 info->rco = baud_co_25[i]; /* Rx CO */
3163 }
3164 }
3165 if (baud_table[i] == 134) {
3166 /* get it right for 134.5 baud */
3167 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3168 2;
3169 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3170 ASYNC_SPD_CUST) {
3171 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3172 baud_rate) + 2;
3173 } else if (baud_table[i]) {
3174 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3175 baud_table[i]) + 2;
3176 /* this needs to be propagated into the card info */
3177 } else {
3178 info->timeout = 0;
3179 }
3180 /* By tradition (is it a standard?) a baud rate of zero
3181 implies the line should be/has been closed. A bit
3182 later in this routine such a test is performed. */
3183
3184 /* byte size and parity */
3185 info->cor5 = 0;
3186 info->cor4 = 0;
3187 /* receive threshold */
3188 info->cor3 = (info->default_threshold ?
3189 info->default_threshold : baud_cor3[i]);
3190 info->cor2 = CyETC;
3191 switch (cflag & CSIZE) {
3192 case CS5:
3193 info->cor1 = Cy_5_BITS;
3194 break;
3195 case CS6:
3196 info->cor1 = Cy_6_BITS;
3197 break;
3198 case CS7:
3199 info->cor1 = Cy_7_BITS;
3200 break;
3201 case CS8:
3202 info->cor1 = Cy_8_BITS;
3203 break;
3204 }
3205 if (cflag & CSTOPB) {
3206 info->cor1 |= Cy_2_STOP;
3207 }
3208 if (cflag & PARENB) {
3209 if (cflag & PARODD) {
3210 info->cor1 |= CyPARITY_O;
3211 } else {
3212 info->cor1 |= CyPARITY_E;
3213 }
3214 } else {
3215 info->cor1 |= CyPARITY_NONE;
3216 }
3217
3218 /* CTS flow control flag */
3219 if (cflag & CRTSCTS) {
3220 info->flags |= ASYNC_CTS_FLOW;
3221 info->cor2 |= CyCtsAE;
3222 } else {
3223 info->flags &= ~ASYNC_CTS_FLOW;
3224 info->cor2 &= ~CyCtsAE;
3225 }
3226 if (cflag & CLOCAL)
3227 info->flags &= ~ASYNC_CHECK_CD;
3228 else
3229 info->flags |= ASYNC_CHECK_CD;
3230
3231 /***********************************************
3232 The hardware option, CyRtsAO, presents RTS when
3233 the chip has characters to send. Since most modems
3234 use RTS as reverse (inbound) flow control, this
3235 option is not used. If inbound flow control is
3236 necessary, DTR can be programmed to provide the
3237 appropriate signals for use with a non-standard
3238 cable. Contact Marcio Saito for details.
3239 ***********************************************/
3240
3241 chip = channel >> 2;
3242 channel &= 0x03;
3243 base_addr = cy_card[card].base_addr +
3244 (cy_chip_offset[chip] << index);
3245
3246 CY_LOCK(info, flags);
3247 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3248
3249 /* tx and rx baud rate */
3250
3251 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3252 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3253 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3254 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3255
3256 /* set line characteristics according configuration */
3257
3258 cy_writeb(base_addr + (CySCHR1 << index),
3259 START_CHAR(info->tty));
3260 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3261 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3262 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3263 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3264 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3265 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3266
3267 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3268 CyCOR3ch, index);
3269
3270 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3271 cy_writeb(base_addr + (CyRTPR << index),
3272 (info->default_timeout ? info->default_timeout : 0x02));
3273 /* 10ms rx timeout */
3274
3275 if (C_CLOCAL(info->tty)) {
3276 /* without modem intr */
3277 cy_writeb(base_addr + (CySRER << index),
3278 cy_readb(base_addr +
3279 (CySRER << index)) | CyMdmCh);
3280 /* act on 1->0 modem transitions */
3281 if ((cflag & CRTSCTS) && info->rflow) {
3282 cy_writeb(base_addr + (CyMCOR1 << index),
3283 (CyCTS | rflow_thr[i]));
3284 } else {
3285 cy_writeb(base_addr + (CyMCOR1 << index),
3286 CyCTS);
3287 }
3288 /* act on 0->1 modem transitions */
3289 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3290 } else {
3291 /* without modem intr */
3292 cy_writeb(base_addr + (CySRER << index),
3293 cy_readb(base_addr +
3294 (CySRER << index)) | CyMdmCh);
3295 /* act on 1->0 modem transitions */
3296 if ((cflag & CRTSCTS) && info->rflow) {
3297 cy_writeb(base_addr + (CyMCOR1 << index),
3298 (CyDSR | CyCTS | CyRI | CyDCD |
3299 rflow_thr[i]));
3300 } else {
3301 cy_writeb(base_addr + (CyMCOR1 << index),
3302 CyDSR | CyCTS | CyRI | CyDCD);
3303 }
3304 /* act on 0->1 modem transitions */
3305 cy_writeb(base_addr + (CyMCOR2 << index),
3306 CyDSR | CyCTS | CyRI | CyDCD);
3307 }
3308
3309 if (i == 0) { /* baud rate is zero, turn off line */
3310 if (info->rtsdtr_inv) {
3311 cy_writeb(base_addr + (CyMSVR1 << index),
3312 ~CyRTS);
3313 } else {
3314 cy_writeb(base_addr + (CyMSVR2 << index),
3315 ~CyDTR);
3316 }
3317 #ifdef CY_DEBUG_DTR
3318 printk("cyc:set_line_char dropping DTR\n");
3319 printk(" status: 0x%x, 0x%x\n",
3320 cy_readb(base_addr + (CyMSVR1 << index)),
3321 cy_readb(base_addr + (CyMSVR2 << index)));
3322 #endif
3323 } else {
3324 if (info->rtsdtr_inv) {
3325 cy_writeb(base_addr + (CyMSVR1 << index),
3326 CyRTS);
3327 } else {
3328 cy_writeb(base_addr + (CyMSVR2 << index),
3329 CyDTR);
3330 }
3331 #ifdef CY_DEBUG_DTR
3332 printk("cyc:set_line_char raising DTR\n");
3333 printk(" status: 0x%x, 0x%x\n",
3334 cy_readb(base_addr + (CyMSVR1 << index)),
3335 cy_readb(base_addr + (CyMSVR2 << index)));
3336 #endif
3337 }
3338
3339 if (info->tty) {
3340 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3341 }
3342 CY_UNLOCK(info, flags);
3343
3344 } else {
3345 struct FIRM_ID __iomem *firm_id;
3346 struct ZFW_CTRL __iomem *zfw_ctrl;
3347 struct BOARD_CTRL __iomem *board_ctrl;
3348 struct CH_CTRL __iomem *ch_ctrl;
3349 struct BUF_CTRL __iomem *buf_ctrl;
3350 uclong sw_flow;
3351 int retval;
3352
3353 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3354 if (!ISZLOADED(cy_card[card])) {
3355 return;
3356 }
3357
3358 zfw_ctrl = cy_card[card].base_addr +
3359 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3360 board_ctrl = &zfw_ctrl->board_ctrl;
3361 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3362 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3363
3364 /* baud rate */
3365 baud = tty_get_baud_rate(info->tty);
3366 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3367 ASYNC_SPD_CUST) {
3368 if (info->custom_divisor)
3369 baud_rate = info->baud / info->custom_divisor;
3370 else
3371 baud_rate = info->baud;
3372 } else if (baud > CYZ_MAX_SPEED) {
3373 baud = CYZ_MAX_SPEED;
3374 }
3375 cy_writel(&ch_ctrl->comm_baud, baud);
3376
3377 if (baud == 134) {
3378 /* get it right for 134.5 baud */
3379 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3380 2;
3381 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3382 ASYNC_SPD_CUST) {
3383 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3384 baud_rate) + 2;
3385 } else if (baud) {
3386 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3387 baud) + 2;
3388 /* this needs to be propagated into the card info */
3389 } else {
3390 info->timeout = 0;
3391 }
3392
3393 /* byte size and parity */
3394 switch (cflag & CSIZE) {
3395 case CS5:
3396 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3397 break;
3398 case CS6:
3399 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3400 break;
3401 case CS7:
3402 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3403 break;
3404 case CS8:
3405 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3406 break;
3407 }
3408 if (cflag & CSTOPB) {
3409 cy_writel(&ch_ctrl->comm_data_l,
3410 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3411 } else {
3412 cy_writel(&ch_ctrl->comm_data_l,
3413 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3414 }
3415 if (cflag & PARENB) {
3416 if (cflag & PARODD) {
3417 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3418 } else {
3419 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3420 }
3421 } else {
3422 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3423 }
3424
3425 /* CTS flow control flag */
3426 if (cflag & CRTSCTS) {
3427 cy_writel(&ch_ctrl->hw_flow,
3428 cy_readl(&ch_ctrl->
3429 hw_flow) | C_RS_CTS | C_RS_RTS);
3430 } else {
3431 cy_writel(&ch_ctrl->hw_flow,
3432 cy_readl(&ch_ctrl->
3433 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3434 }
3435 /* As the HW flow control is done in firmware, the driver
3436 doesn't need to care about it */
3437 info->flags &= ~ASYNC_CTS_FLOW;
3438
3439 /* XON/XOFF/XANY flow control flags */
3440 sw_flow = 0;
3441 if (iflag & IXON) {
3442 sw_flow |= C_FL_OXX;
3443 if (iflag & IXANY)
3444 sw_flow |= C_FL_OIXANY;
3445 }
3446 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3447
3448 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3449 if (retval != 0) {
3450 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3451 info->line, retval);
3452 }
3453
3454 /* CD sensitivity */
3455 if (cflag & CLOCAL) {
3456 info->flags &= ~ASYNC_CHECK_CD;
3457 } else {
3458 info->flags |= ASYNC_CHECK_CD;
3459 }
3460
3461 if (baud == 0) { /* baud rate is zero, turn off line */
3462 cy_writel(&ch_ctrl->rs_control,
3463 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3464 #ifdef CY_DEBUG_DTR
3465 printk("cyc:set_line_char dropping Z DTR\n");
3466 #endif
3467 } else {
3468 cy_writel(&ch_ctrl->rs_control,
3469 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3470 #ifdef CY_DEBUG_DTR
3471 printk("cyc:set_line_char raising Z DTR\n");
3472 #endif
3473 }
3474
3475 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3476 if (retval != 0) {
3477 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3478 info->line, retval);
3479 }
3480
3481 if (info->tty) {
3482 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3483 }
3484 }
3485 } /* set_line_char */
3486
3487 static int
3488 get_serial_info(struct cyclades_port *info,
3489 struct serial_struct __user * retinfo)
3490 {
3491 struct serial_struct tmp;
3492 struct cyclades_card *cinfo = &cy_card[info->card];
3493
3494 if (!retinfo)
3495 return -EFAULT;
3496 memset(&tmp, 0, sizeof(tmp));
3497 tmp.type = info->type;
3498 tmp.line = info->line;
3499 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3500 tmp.irq = cinfo->irq;
3501 tmp.flags = info->flags;
3502 tmp.close_delay = info->close_delay;
3503 tmp.baud_base = info->baud;
3504 tmp.custom_divisor = info->custom_divisor;
3505 tmp.hub6 = 0; /*!!! */
3506 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3507 } /* get_serial_info */
3508
3509 static int
3510 set_serial_info(struct cyclades_port *info,
3511 struct serial_struct __user * new_info)
3512 {
3513 struct serial_struct new_serial;
3514 struct cyclades_port old_info;
3515
3516 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3517 return -EFAULT;
3518 old_info = *info;
3519
3520 if (!capable(CAP_SYS_ADMIN)) {
3521 if (new_serial.close_delay != info->close_delay ||
3522 new_serial.baud_base != info->baud ||
3523 (new_serial.flags & ASYNC_FLAGS &
3524 ~ASYNC_USR_MASK) !=
3525 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3526 return -EPERM;
3527 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3528 (new_serial.flags & ASYNC_USR_MASK);
3529 info->baud = new_serial.baud_base;
3530 info->custom_divisor = new_serial.custom_divisor;
3531 goto check_and_exit;
3532 }
3533
3534 /*
3535 * OK, past this point, all the error checking has been done.
3536 * At this point, we start making changes.....
3537 */
3538
3539 info->baud = new_serial.baud_base;
3540 info->custom_divisor = new_serial.custom_divisor;
3541 info->flags = (info->flags & ~ASYNC_FLAGS) |
3542 (new_serial.flags & ASYNC_FLAGS);
3543 info->close_delay = new_serial.close_delay * HZ / 100;
3544 info->closing_wait = new_serial.closing_wait * HZ / 100;
3545
3546 check_and_exit:
3547 if (info->flags & ASYNC_INITIALIZED) {
3548 set_line_char(info);
3549 return 0;
3550 } else {
3551 return startup(info);
3552 }
3553 } /* set_serial_info */
3554
3555 /*
3556 * get_lsr_info - get line status register info
3557 *
3558 * Purpose: Let user call ioctl() to get info when the UART physically
3559 * is emptied. On bus types like RS485, the transmitter must
3560 * release the bus after transmitting. This must be done when
3561 * the transmit shift register is empty, not be done when the
3562 * transmit holding register is empty. This functionality
3563 * allows an RS485 driver to be written in user space.
3564 */
3565 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3566 {
3567 int card, chip, channel, index;
3568 unsigned char status;
3569 unsigned int result;
3570 unsigned long flags;
3571 void __iomem *base_addr;
3572
3573 card = info->card;
3574 channel = (info->line) - (cy_card[card].first_line);
3575 if (!IS_CYC_Z(cy_card[card])) {
3576 chip = channel >> 2;
3577 channel &= 0x03;
3578 index = cy_card[card].bus_index;
3579 base_addr =
3580 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3581
3582 CY_LOCK(info, flags);
3583 status = cy_readb(base_addr + (CySRER << index)) &
3584 (CyTxRdy | CyTxMpty);
3585 CY_UNLOCK(info, flags);
3586 result = (status ? 0 : TIOCSER_TEMT);
3587 } else {
3588 /* Not supported yet */
3589 return -EINVAL;
3590 }
3591 return put_user(result, (unsigned long __user *)value);
3592 }
3593
3594 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3595 {
3596 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3597 int card, chip, channel, index;
3598 void __iomem *base_addr;
3599 unsigned long flags;
3600 unsigned char status;
3601 unsigned long lstatus;
3602 unsigned int result;
3603 struct FIRM_ID __iomem *firm_id;
3604 struct ZFW_CTRL __iomem *zfw_ctrl;
3605 struct BOARD_CTRL __iomem *board_ctrl;
3606 struct CH_CTRL __iomem *ch_ctrl;
3607
3608 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3609 return -ENODEV;
3610
3611 card = info->card;
3612 channel = (info->line) - (cy_card[card].first_line);
3613 if (!IS_CYC_Z(cy_card[card])) {
3614 chip = channel >> 2;
3615 channel &= 0x03;
3616 index = cy_card[card].bus_index;
3617 base_addr =
3618 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3619
3620 CY_LOCK(info, flags);
3621 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3622 status = cy_readb(base_addr + (CyMSVR1 << index));
3623 status |= cy_readb(base_addr + (CyMSVR2 << index));
3624 CY_UNLOCK(info, flags);
3625
3626 if (info->rtsdtr_inv) {
3627 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3628 ((status & CyDTR) ? TIOCM_RTS : 0);
3629 } else {
3630 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3631 ((status & CyDTR) ? TIOCM_DTR : 0);
3632 }
3633 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3634 ((status & CyRI) ? TIOCM_RNG : 0) |
3635 ((status & CyDSR) ? TIOCM_DSR : 0) |
3636 ((status & CyCTS) ? TIOCM_CTS : 0);
3637 } else {
3638 base_addr = cy_card[card].base_addr;
3639
3640 if (cy_card[card].num_chips != -1) {
3641 return -EINVAL;
3642 }
3643
3644 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3645 if (ISZLOADED(cy_card[card])) {
3646 zfw_ctrl = cy_card[card].base_addr +
3647 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3648 board_ctrl = &zfw_ctrl->board_ctrl;
3649 ch_ctrl = zfw_ctrl->ch_ctrl;
3650 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3651 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3652 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3653 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3654 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3655 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3656 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3657 } else {
3658 result = 0;
3659 return -ENODEV;
3660 }
3661
3662 }
3663 return result;
3664 } /* cy_tiomget */
3665
3666 static int
3667 cy_tiocmset(struct tty_struct *tty, struct file *file,
3668 unsigned int set, unsigned int clear)
3669 {
3670 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3671 int card, chip, channel, index;
3672 void __iomem *base_addr;
3673 unsigned long flags;
3674 struct FIRM_ID __iomem *firm_id;
3675 struct ZFW_CTRL __iomem *zfw_ctrl;
3676 struct BOARD_CTRL __iomem *board_ctrl;
3677 struct CH_CTRL __iomem *ch_ctrl;
3678 int retval;
3679
3680 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3681 return -ENODEV;
3682
3683 card = info->card;
3684 channel = (info->line) - (cy_card[card].first_line);
3685 if (!IS_CYC_Z(cy_card[card])) {
3686 chip = channel >> 2;
3687 channel &= 0x03;
3688 index = cy_card[card].bus_index;
3689 base_addr =
3690 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3691
3692 if (set & TIOCM_RTS) {
3693 CY_LOCK(info, flags);
3694 cy_writeb(base_addr + (CyCAR << index),
3695 (u_char) channel);
3696 if (info->rtsdtr_inv) {
3697 cy_writeb(base_addr + (CyMSVR2 << index),
3698 CyDTR);
3699 } else {
3700 cy_writeb(base_addr + (CyMSVR1 << index),
3701 CyRTS);
3702 }
3703 CY_UNLOCK(info, flags);
3704 }
3705 if (clear & TIOCM_RTS) {
3706 CY_LOCK(info, flags);
3707 cy_writeb(base_addr + (CyCAR << index),
3708 (u_char) channel);
3709 if (info->rtsdtr_inv) {
3710 cy_writeb(base_addr + (CyMSVR2 << index),
3711 ~CyDTR);
3712 } else {
3713 cy_writeb(base_addr + (CyMSVR1 << index),
3714 ~CyRTS);
3715 }
3716 CY_UNLOCK(info, flags);
3717 }
3718 if (set & TIOCM_DTR) {
3719 CY_LOCK(info, flags);
3720 cy_writeb(base_addr + (CyCAR << index),
3721 (u_char) channel);
3722 if (info->rtsdtr_inv) {
3723 cy_writeb(base_addr + (CyMSVR1 << index),
3724 CyRTS);
3725 } else {
3726 cy_writeb(base_addr + (CyMSVR2 << index),
3727 CyDTR);
3728 }
3729 #ifdef CY_DEBUG_DTR
3730 printk("cyc:set_modem_info raising DTR\n");
3731 printk(" status: 0x%x, 0x%x\n",
3732 cy_readb(base_addr + (CyMSVR1 << index)),
3733 cy_readb(base_addr + (CyMSVR2 << index)));
3734 #endif
3735 CY_UNLOCK(info, flags);
3736 }
3737 if (clear & TIOCM_DTR) {
3738 CY_LOCK(info, flags);
3739 cy_writeb(base_addr + (CyCAR << index),
3740 (u_char) channel);
3741 if (info->rtsdtr_inv) {
3742 cy_writeb(base_addr + (CyMSVR1 << index),
3743 ~CyRTS);
3744 } else {
3745 cy_writeb(base_addr + (CyMSVR2 << index),
3746 ~CyDTR);
3747 }
3748
3749 #ifdef CY_DEBUG_DTR
3750 printk("cyc:set_modem_info dropping DTR\n");
3751 printk(" status: 0x%x, 0x%x\n",
3752 cy_readb(base_addr + (CyMSVR1 << index)),
3753 cy_readb(base_addr + (CyMSVR2 << index)));
3754 #endif
3755 CY_UNLOCK(info, flags);
3756 }
3757 } else {
3758 base_addr = cy_card[card].base_addr;
3759
3760 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3761 if (ISZLOADED(cy_card[card])) {
3762 zfw_ctrl = cy_card[card].base_addr +
3763 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3764 board_ctrl = &zfw_ctrl->board_ctrl;
3765 ch_ctrl = zfw_ctrl->ch_ctrl;
3766
3767 if (set & TIOCM_RTS) {
3768 CY_LOCK(info, flags);
3769 cy_writel(&ch_ctrl[channel].rs_control,
3770 cy_readl(&ch_ctrl[channel].
3771 rs_control) | C_RS_RTS);
3772 CY_UNLOCK(info, flags);
3773 }
3774 if (clear & TIOCM_RTS) {
3775 CY_LOCK(info, flags);
3776 cy_writel(&ch_ctrl[channel].rs_control,
3777 cy_readl(&ch_ctrl[channel].
3778 rs_control) & ~C_RS_RTS);
3779 CY_UNLOCK(info, flags);
3780 }
3781 if (set & TIOCM_DTR) {
3782 CY_LOCK(info, flags);
3783 cy_writel(&ch_ctrl[channel].rs_control,
3784 cy_readl(&ch_ctrl[channel].
3785 rs_control) | C_RS_DTR);
3786 #ifdef CY_DEBUG_DTR
3787 printk("cyc:set_modem_info raising Z DTR\n");
3788 #endif
3789 CY_UNLOCK(info, flags);
3790 }
3791 if (clear & TIOCM_DTR) {
3792 CY_LOCK(info, flags);
3793 cy_writel(&ch_ctrl[channel].rs_control,
3794 cy_readl(&ch_ctrl[channel].
3795 rs_control) & ~C_RS_DTR);
3796 #ifdef CY_DEBUG_DTR
3797 printk("cyc:set_modem_info clearing Z DTR\n");
3798 #endif
3799 CY_UNLOCK(info, flags);
3800 }
3801 } else {
3802 return -ENODEV;
3803 }
3804 CY_LOCK(info, flags);
3805 retval = cyz_issue_cmd(&cy_card[info->card],
3806 channel, C_CM_IOCTLM, 0L);
3807 if (retval != 0) {
3808 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3809 info->line, retval);
3810 }
3811 CY_UNLOCK(info, flags);
3812 }
3813 return 0;
3814 } /* cy_tiocmset */
3815
3816 /*
3817 * cy_break() --- routine which turns the break handling on or off
3818 */
3819 static void cy_break(struct tty_struct *tty, int break_state)
3820 {
3821 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3822 unsigned long flags;
3823
3824 if (serial_paranoia_check(info, tty->name, "cy_break"))
3825 return;
3826
3827 CY_LOCK(info, flags);
3828 if (!IS_CYC_Z(cy_card[info->card])) {
3829 /* Let the transmit ISR take care of this (since it
3830 requires stuffing characters into the output stream).
3831 */
3832 if (break_state == -1) {
3833 if (!info->breakon) {
3834 info->breakon = 1;
3835 if (!info->xmit_cnt) {
3836 CY_UNLOCK(info, flags);
3837 start_xmit(info);
3838 CY_LOCK(info, flags);
3839 }
3840 }
3841 } else {
3842 if (!info->breakoff) {
3843 info->breakoff = 1;
3844 if (!info->xmit_cnt) {
3845 CY_UNLOCK(info, flags);
3846 start_xmit(info);
3847 CY_LOCK(info, flags);
3848 }
3849 }
3850 }
3851 } else {
3852 int retval;
3853
3854 if (break_state == -1) {
3855 retval = cyz_issue_cmd(&cy_card[info->card],
3856 info->line - cy_card[info->card].first_line,
3857 C_CM_SET_BREAK, 0L);
3858 if (retval != 0) {
3859 printk("cyc:cy_break (set) retval on ttyC%d "
3860 "was %x\n", info->line, retval);
3861 }
3862 } else {
3863 retval = cyz_issue_cmd(&cy_card[info->card],
3864 info->line - cy_card[info->card].first_line,
3865 C_CM_CLR_BREAK, 0L);
3866 if (retval != 0) {
3867 printk("cyc:cy_break (clr) retval on ttyC%d "
3868 "was %x\n", info->line, retval);
3869 }
3870 }
3871 }
3872 CY_UNLOCK(info, flags);
3873 } /* cy_break */
3874
3875 static int
3876 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3877 {
3878
3879 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3880 return -EFAULT;
3881 info->mon.int_count = 0;
3882 info->mon.char_count = 0;
3883 info->mon.char_max = 0;
3884 info->mon.char_last = 0;
3885 return 0;
3886 } /* get_mon_info */
3887
3888 static int set_threshold(struct cyclades_port *info, unsigned long value)
3889 {
3890 void __iomem *base_addr;
3891 int card, channel, chip, index;
3892 unsigned long flags;
3893
3894 card = info->card;
3895 channel = info->line - cy_card[card].first_line;
3896 if (!IS_CYC_Z(cy_card[card])) {
3897 chip = channel >> 2;
3898 channel &= 0x03;
3899 index = cy_card[card].bus_index;
3900 base_addr =
3901 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3902
3903 info->cor3 &= ~CyREC_FIFO;
3904 info->cor3 |= value & CyREC_FIFO;
3905
3906 CY_LOCK(info, flags);
3907 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3908 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3909 CY_UNLOCK(info, flags);
3910 } else {
3911 /* Nothing to do! */
3912 }
3913 return 0;
3914 } /* set_threshold */
3915
3916 static int
3917 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3918 {
3919 void __iomem *base_addr;
3920 int card, channel, chip, index;
3921 unsigned long tmp;
3922
3923 card = info->card;
3924 channel = info->line - cy_card[card].first_line;
3925 if (!IS_CYC_Z(cy_card[card])) {
3926 chip = channel >> 2;
3927 channel &= 0x03;
3928 index = cy_card[card].bus_index;
3929 base_addr =
3930 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3931
3932 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3933 return put_user(tmp, value);
3934 } else {
3935 /* Nothing to do! */
3936 return 0;
3937 }
3938 } /* get_threshold */
3939
3940 static int
3941 set_default_threshold(struct cyclades_port *info, unsigned long value)
3942 {
3943 info->default_threshold = value & 0x0f;
3944 return 0;
3945 } /* set_default_threshold */
3946
3947 static int
3948 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3949 {
3950 return put_user(info->default_threshold, value);
3951 } /* get_default_threshold */
3952
3953 static int set_timeout(struct cyclades_port *info, unsigned long value)
3954 {
3955 void __iomem *base_addr;
3956 int card, channel, chip, index;
3957 unsigned long flags;
3958
3959 card = info->card;
3960 channel = info->line - cy_card[card].first_line;
3961 if (!IS_CYC_Z(cy_card[card])) {
3962 chip = channel >> 2;
3963 channel &= 0x03;
3964 index = cy_card[card].bus_index;
3965 base_addr =
3966 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3967
3968 CY_LOCK(info, flags);
3969 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3970 CY_UNLOCK(info, flags);
3971 } else {
3972 /* Nothing to do! */
3973 }
3974 return 0;
3975 } /* set_timeout */
3976
3977 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3978 {
3979 void __iomem *base_addr;
3980 int card, channel, chip, index;
3981 unsigned long tmp;
3982
3983 card = info->card;
3984 channel = info->line - cy_card[card].first_line;
3985 if (!IS_CYC_Z(cy_card[card])) {
3986 chip = channel >> 2;
3987 channel &= 0x03;
3988 index = cy_card[card].bus_index;
3989 base_addr =
3990 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3991
3992 tmp = cy_readb(base_addr + (CyRTPR << index));
3993 return put_user(tmp, value);
3994 } else {
3995 /* Nothing to do! */
3996 return 0;
3997 }
3998 } /* get_timeout */
3999
4000 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
4001 {
4002 info->default_timeout = value & 0xff;
4003 return 0;
4004 } /* set_default_timeout */
4005
4006 static int
4007 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
4008 {
4009 return put_user(info->default_timeout, value);
4010 } /* get_default_timeout */
4011
4012 /*
4013 * This routine allows the tty driver to implement device-
4014 * specific ioctl's. If the ioctl number passed in cmd is
4015 * not recognized by the driver, it should return ENOIOCTLCMD.
4016 */
4017 static int
4018 cy_ioctl(struct tty_struct *tty, struct file *file,
4019 unsigned int cmd, unsigned long arg)
4020 {
4021 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4022 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4023 struct serial_icounter_struct __user *p_cuser; /* user space */
4024 int ret_val = 0;
4025 unsigned long flags;
4026 void __user *argp = (void __user *)arg;
4027
4028 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4029 return -ENODEV;
4030
4031 #ifdef CY_DEBUG_OTHER
4032 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4033 #endif
4034
4035 switch (cmd) {
4036 case CYGETMON:
4037 ret_val = get_mon_info(info, argp);
4038 break;
4039 case CYGETTHRESH:
4040 ret_val = get_threshold(info, argp);
4041 break;
4042 case CYSETTHRESH:
4043 ret_val = set_threshold(info, arg);
4044 break;
4045 case CYGETDEFTHRESH:
4046 ret_val = get_default_threshold(info, argp);
4047 break;
4048 case CYSETDEFTHRESH:
4049 ret_val = set_default_threshold(info, arg);
4050 break;
4051 case CYGETTIMEOUT:
4052 ret_val = get_timeout(info, argp);
4053 break;
4054 case CYSETTIMEOUT:
4055 ret_val = set_timeout(info, arg);
4056 break;
4057 case CYGETDEFTIMEOUT:
4058 ret_val = get_default_timeout(info, argp);
4059 break;
4060 case CYSETDEFTIMEOUT:
4061 ret_val = set_default_timeout(info, arg);
4062 break;
4063 case CYSETRFLOW:
4064 info->rflow = (int)arg;
4065 ret_val = 0;
4066 break;
4067 case CYGETRFLOW:
4068 ret_val = info->rflow;
4069 break;
4070 case CYSETRTSDTR_INV:
4071 info->rtsdtr_inv = (int)arg;
4072 ret_val = 0;
4073 break;
4074 case CYGETRTSDTR_INV:
4075 ret_val = info->rtsdtr_inv;
4076 break;
4077 case CYGETCARDINFO:
4078 if (copy_to_user(argp, &cy_card[info->card],
4079 sizeof(struct cyclades_card))) {
4080 ret_val = -EFAULT;
4081 break;
4082 }
4083 ret_val = 0;
4084 break;
4085 case CYGETCD1400VER:
4086 ret_val = info->chip_rev;
4087 break;
4088 #ifndef CONFIG_CYZ_INTR
4089 case CYZSETPOLLCYCLE:
4090 cyz_polling_cycle = (arg * HZ) / 1000;
4091 ret_val = 0;
4092 break;
4093 case CYZGETPOLLCYCLE:
4094 ret_val = (cyz_polling_cycle * 1000) / HZ;
4095 break;
4096 #endif /* CONFIG_CYZ_INTR */
4097 case CYSETWAIT:
4098 info->closing_wait = (unsigned short)arg *HZ / 100;
4099 ret_val = 0;
4100 break;
4101 case CYGETWAIT:
4102 ret_val = info->closing_wait / (HZ / 100);
4103 break;
4104 case TIOCGSERIAL:
4105 ret_val = get_serial_info(info, argp);
4106 break;
4107 case TIOCSSERIAL:
4108 ret_val = set_serial_info(info, argp);
4109 break;
4110 case TIOCSERGETLSR: /* Get line status register */
4111 ret_val = get_lsr_info(info, argp);
4112 break;
4113 /*
4114 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4115 * - mask passed in arg for lines of interest
4116 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4117 * Caller should use TIOCGICOUNT to see which one it was
4118 */
4119 case TIOCMIWAIT:
4120 CY_LOCK(info, flags);
4121 /* note the counters on entry */
4122 cprev = info->icount;
4123 CY_UNLOCK(info, flags);
4124 while (1) {
4125 interruptible_sleep_on(&info->delta_msr_wait);
4126 /* see if a signal did it */
4127 if (signal_pending(current)) {
4128 return -ERESTARTSYS;
4129 }
4130
4131 CY_LOCK(info, flags);
4132 cnow = info->icount; /* atomic copy */
4133 CY_UNLOCK(info, flags);
4134
4135 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4136 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4137 return -EIO; /* no change => error */
4138 }
4139 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4140 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4141 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4142 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4143 return 0;
4144 }
4145 cprev = cnow;
4146 }
4147 /* NOTREACHED */
4148
4149 /*
4150 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4151 * Return: write counters to the user passed counter struct
4152 * NB: both 1->0 and 0->1 transitions are counted except for
4153 * RI where only 0->1 is counted.
4154 */
4155 case TIOCGICOUNT:
4156 CY_LOCK(info, flags);
4157 cnow = info->icount;
4158 CY_UNLOCK(info, flags);
4159 p_cuser = argp;
4160 ret_val = put_user(cnow.cts, &p_cuser->cts);
4161 if (ret_val)
4162 return ret_val;
4163 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4164 if (ret_val)
4165 return ret_val;
4166 ret_val = put_user(cnow.rng, &p_cuser->rng);
4167 if (ret_val)
4168 return ret_val;
4169 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4170 if (ret_val)
4171 return ret_val;
4172 ret_val = put_user(cnow.rx, &p_cuser->rx);
4173 if (ret_val)
4174 return ret_val;
4175 ret_val = put_user(cnow.tx, &p_cuser->tx);
4176 if (ret_val)
4177 return ret_val;
4178 ret_val = put_user(cnow.frame, &p_cuser->frame);
4179 if (ret_val)
4180 return ret_val;
4181 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4182 if (ret_val)
4183 return ret_val;
4184 ret_val = put_user(cnow.parity, &p_cuser->parity);
4185 if (ret_val)
4186 return ret_val;
4187 ret_val = put_user(cnow.brk, &p_cuser->brk);
4188 if (ret_val)
4189 return ret_val;
4190 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4191 if (ret_val)
4192 return ret_val;
4193 ret_val = 0;
4194 break;
4195 default:
4196 ret_val = -ENOIOCTLCMD;
4197 }
4198
4199 #ifdef CY_DEBUG_OTHER
4200 printk(" cyc:cy_ioctl done\n");
4201 #endif
4202
4203 return ret_val;
4204 } /* cy_ioctl */
4205
4206 /*
4207 * This routine allows the tty driver to be notified when
4208 * device's termios settings have changed. Note that a
4209 * well-designed tty driver should be prepared to accept the case
4210 * where old == NULL, and try to do something rational.
4211 */
4212 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4213 {
4214 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4215
4216 #ifdef CY_DEBUG_OTHER
4217 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4218 #endif
4219
4220 if (tty->termios->c_cflag == old_termios->c_cflag &&
4221 (tty->termios->c_iflag & (IXON | IXANY)) ==
4222 (old_termios->c_iflag & (IXON | IXANY)))
4223 return;
4224 set_line_char(info);
4225
4226 if ((old_termios->c_cflag & CRTSCTS) &&
4227 !(tty->termios->c_cflag & CRTSCTS)) {
4228 tty->hw_stopped = 0;
4229 cy_start(tty);
4230 }
4231 #if 0
4232 /*
4233 * No need to wake up processes in open wait, since they
4234 * sample the CLOCAL flag once, and don't recheck it.
4235 * XXX It's not clear whether the current behavior is correct
4236 * or not. Hence, this may change.....
4237 */
4238 if (!(old_termios->c_cflag & CLOCAL) &&
4239 (tty->termios->c_cflag & CLOCAL))
4240 wake_up_interruptible(&info->open_wait);
4241 #endif
4242 } /* cy_set_termios */
4243
4244 /* This function is used to send a high-priority XON/XOFF character to
4245 the device.
4246 */
4247 static void cy_send_xchar(struct tty_struct *tty, char ch)
4248 {
4249 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4250 int card, channel;
4251
4252 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4253 return;
4254
4255 info->x_char = ch;
4256
4257 if (ch)
4258 cy_start(tty);
4259
4260 card = info->card;
4261 channel = info->line - cy_card[card].first_line;
4262
4263 if (IS_CYC_Z(cy_card[card])) {
4264 if (ch == STOP_CHAR(tty))
4265 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4266 0L);
4267 else if (ch == START_CHAR(tty))
4268 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4269 0L);
4270 }
4271 }
4272
4273 /* This routine is called by the upper-layer tty layer to signal
4274 that incoming characters should be throttled because the input
4275 buffers are close to full.
4276 */
4277 static void cy_throttle(struct tty_struct *tty)
4278 {
4279 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4280 unsigned long flags;
4281 void __iomem *base_addr;
4282 int card, chip, channel, index;
4283
4284 #ifdef CY_DEBUG_THROTTLE
4285 char buf[64];
4286
4287 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4288 tty->ldisc.chars_in_buffer(tty), info->line);
4289 #endif
4290
4291 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4292 return;
4293 }
4294
4295 card = info->card;
4296
4297 if (I_IXOFF(tty)) {
4298 if (!IS_CYC_Z(cy_card[card]))
4299 cy_send_xchar(tty, STOP_CHAR(tty));
4300 else
4301 info->throttle = 1;
4302 }
4303
4304 if (tty->termios->c_cflag & CRTSCTS) {
4305 channel = info->line - cy_card[card].first_line;
4306 if (!IS_CYC_Z(cy_card[card])) {
4307 chip = channel >> 2;
4308 channel &= 0x03;
4309 index = cy_card[card].bus_index;
4310 base_addr = cy_card[card].base_addr +
4311 (cy_chip_offset[chip] << index);
4312
4313 CY_LOCK(info, flags);
4314 cy_writeb(base_addr + (CyCAR << index),
4315 (u_char) channel);
4316 if (info->rtsdtr_inv) {
4317 cy_writeb(base_addr + (CyMSVR2 << index),
4318 ~CyDTR);
4319 } else {
4320 cy_writeb(base_addr + (CyMSVR1 << index),
4321 ~CyRTS);
4322 }
4323 CY_UNLOCK(info, flags);
4324 } else {
4325 info->throttle = 1;
4326 }
4327 }
4328 } /* cy_throttle */
4329
4330 /*
4331 * This routine notifies the tty driver that it should signal
4332 * that characters can now be sent to the tty without fear of
4333 * overrunning the input buffers of the line disciplines.
4334 */
4335 static void cy_unthrottle(struct tty_struct *tty)
4336 {
4337 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4338 unsigned long flags;
4339 void __iomem *base_addr;
4340 int card, chip, channel, index;
4341
4342 #ifdef CY_DEBUG_THROTTLE
4343 char buf[64];
4344
4345 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4346 tty->ldisc.chars_in_buffer(tty), info->line);
4347 #endif
4348
4349 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4350 return;
4351 }
4352
4353 if (I_IXOFF(tty)) {
4354 if (info->x_char)
4355 info->x_char = 0;
4356 else
4357 cy_send_xchar(tty, START_CHAR(tty));
4358 }
4359
4360 if (tty->termios->c_cflag & CRTSCTS) {
4361 card = info->card;
4362 channel = info->line - cy_card[card].first_line;
4363 if (!IS_CYC_Z(cy_card[card])) {
4364 chip = channel >> 2;
4365 channel &= 0x03;
4366 index = cy_card[card].bus_index;
4367 base_addr = cy_card[card].base_addr +
4368 (cy_chip_offset[chip] << index);
4369
4370 CY_LOCK(info, flags);
4371 cy_writeb(base_addr + (CyCAR << index),
4372 (u_char) channel);
4373 if (info->rtsdtr_inv) {
4374 cy_writeb(base_addr + (CyMSVR2 << index),
4375 CyDTR);
4376 } else {
4377 cy_writeb(base_addr + (CyMSVR1 << index),
4378 CyRTS);
4379 }
4380 CY_UNLOCK(info, flags);
4381 } else {
4382 info->throttle = 0;
4383 }
4384 }
4385 } /* cy_unthrottle */
4386
4387 /* cy_start and cy_stop provide software output flow control as a
4388 function of XON/XOFF, software CTS, and other such stuff.
4389 */
4390 static void cy_stop(struct tty_struct *tty)
4391 {
4392 struct cyclades_card *cinfo;
4393 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4394 void __iomem *base_addr;
4395 int chip, channel, index;
4396 unsigned long flags;
4397
4398 #ifdef CY_DEBUG_OTHER
4399 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4400 #endif
4401
4402 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4403 return;
4404
4405 cinfo = &cy_card[info->card];
4406 channel = info->line - cinfo->first_line;
4407 if (!IS_CYC_Z(*cinfo)) {
4408 index = cinfo->bus_index;
4409 chip = channel >> 2;
4410 channel &= 0x03;
4411 base_addr = cy_card[info->card].base_addr +
4412 (cy_chip_offset[chip] << index);
4413
4414 CY_LOCK(info, flags);
4415 cy_writeb(base_addr + (CyCAR << index),
4416 (u_char)(channel & 0x0003)); /* index channel */
4417 cy_writeb(base_addr + (CySRER << index),
4418 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4419 CY_UNLOCK(info, flags);
4420 } else {
4421 /* Nothing to do! */
4422 }
4423 } /* cy_stop */
4424
4425 static void cy_start(struct tty_struct *tty)
4426 {
4427 struct cyclades_card *cinfo;
4428 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4429 void __iomem *base_addr;
4430 int chip, channel, index;
4431 unsigned long flags;
4432
4433 #ifdef CY_DEBUG_OTHER
4434 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4435 #endif
4436
4437 if (serial_paranoia_check(info, tty->name, "cy_start"))
4438 return;
4439
4440 cinfo = &cy_card[info->card];
4441 channel = info->line - cinfo->first_line;
4442 index = cinfo->bus_index;
4443 if (!IS_CYC_Z(*cinfo)) {
4444 chip = channel >> 2;
4445 channel &= 0x03;
4446 base_addr = cy_card[info->card].base_addr +
4447 (cy_chip_offset[chip] << index);
4448
4449 CY_LOCK(info, flags);
4450 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4451 cy_writeb(base_addr + (CySRER << index),
4452 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4453 CY_UNLOCK(info, flags);
4454 } else {
4455 /* Nothing to do! */
4456 }
4457 } /* cy_start */
4458
4459 static void cy_flush_buffer(struct tty_struct *tty)
4460 {
4461 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4462 int card, channel, retval;
4463 unsigned long flags;
4464
4465 #ifdef CY_DEBUG_IO
4466 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4467 #endif
4468
4469 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4470 return;
4471
4472 card = info->card;
4473 channel = (info->line) - (cy_card[card].first_line);
4474
4475 CY_LOCK(info, flags);
4476 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4477 CY_UNLOCK(info, flags);
4478
4479 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4480 buffers as well */
4481 CY_LOCK(info, flags);
4482 retval =
4483 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4484 if (retval != 0) {
4485 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4486 info->line, retval);
4487 }
4488 CY_UNLOCK(info, flags);
4489 }
4490 tty_wakeup(tty);
4491 wake_up_interruptible(&tty->write_wait);
4492 } /* cy_flush_buffer */
4493
4494 /*
4495 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4496 */
4497 static void cy_hangup(struct tty_struct *tty)
4498 {
4499 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4500
4501 #ifdef CY_DEBUG_OTHER
4502 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4503 #endif
4504
4505 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4506 return;
4507
4508 cy_flush_buffer(tty);
4509 shutdown(info);
4510 info->event = 0;
4511 info->count = 0;
4512 #ifdef CY_DEBUG_COUNT
4513 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4514 #endif
4515 info->tty = NULL;
4516 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4517 wake_up_interruptible(&info->open_wait);
4518 } /* cy_hangup */
4519
4520 /*
4521 * ---------------------------------------------------------------------
4522 * cy_init() and friends
4523 *
4524 * cy_init() is called at boot-time to initialize the serial driver.
4525 * ---------------------------------------------------------------------
4526 */
4527
4528 /* initialize chips on Cyclom-Y card -- return number of valid
4529 chips (which is number of ports/4) */
4530 static unsigned short __init
4531 cyy_init_card(void __iomem * true_base_addr, int index)
4532 {
4533 unsigned int chip_number;
4534 void __iomem *base_addr;
4535
4536 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4537 /* Cy_HwReset is 0x1400 */
4538 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4539 /* Cy_ClrIntr is 0x1800 */
4540 udelay(500L);
4541
4542 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4543 base_addr =
4544 true_base_addr + (cy_chip_offset[chip_number] << index);
4545 mdelay(1);
4546 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4547 /*************
4548 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4549 chip_number, (unsigned long)base_addr);
4550 *************/
4551 return chip_number;
4552 }
4553
4554 cy_writeb(base_addr + (CyGFRCR << index), 0);
4555 udelay(10L);
4556
4557 /* The Cyclom-16Y does not decode address bit 9 and therefore
4558 cannot distinguish between references to chip 0 and a non-
4559 existent chip 4. If the preceding clearing of the supposed
4560 chip 4 GFRCR register appears at chip 0, there is no chip 4
4561 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4562 */
4563 if (chip_number == 4 && cy_readb(true_base_addr +
4564 (cy_chip_offset[0] << index) +
4565 (CyGFRCR << index)) == 0) {
4566 return chip_number;
4567 }
4568
4569 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4570 mdelay(1);
4571
4572 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4573 /*
4574 printk(" chip #%d at %#6lx is not responding ",
4575 chip_number, (unsigned long)base_addr);
4576 printk("(GFRCR stayed 0)\n",
4577 */
4578 return chip_number;
4579 }
4580 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4581 0x40) {
4582 /*
4583 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4584 "%#2x)\n",
4585 chip_number, (unsigned long)base_addr,
4586 base_addr[CyGFRCR<<index]);
4587 */
4588 return chip_number;
4589 }
4590 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4591 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4592 /* It is a CD1400 rev. J or later */
4593 /* Impossible to reach 5ms with this chip.
4594 Changed to 2ms instead (f = 500 Hz). */
4595 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4596 } else {
4597 /* f = 200 Hz */
4598 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4599 }
4600
4601 /*
4602 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4603 chip_number, (unsigned long)base_addr,
4604 cy_readb(base_addr+(CyGFRCR<<index)));
4605 */
4606 }
4607 return chip_number;
4608 } /* cyy_init_card */
4609
4610 /*
4611 * ---------------------------------------------------------------------
4612 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4613 * sets global variables and return the number of ISA boards found.
4614 * ---------------------------------------------------------------------
4615 */
4616 static int __init cy_detect_isa(void)
4617 {
4618 #ifdef CONFIG_ISA
4619 unsigned short cy_isa_irq, nboard;
4620 void __iomem *cy_isa_address;
4621 unsigned short i, j, cy_isa_nchan;
4622 #ifdef MODULE
4623 int isparam = 0;
4624 #endif
4625
4626 nboard = 0;
4627
4628 #ifdef MODULE
4629 /* Check for module parameters */
4630 for (i = 0; i < NR_CARDS; i++) {
4631 if (maddr[i] || i) {
4632 isparam = 1;
4633 cy_isa_addresses[i] = maddr[i];
4634 }
4635 if (!maddr[i])
4636 break;
4637 }
4638 #endif
4639
4640 /* scan the address table probing for Cyclom-Y/ISA boards */
4641 for (i = 0; i < NR_ISA_ADDRS; i++) {
4642 unsigned int isa_address = cy_isa_addresses[i];
4643 if (isa_address == 0x0000) {
4644 return nboard;
4645 }
4646
4647 /* probe for CD1400... */
4648 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4649 cy_isa_nchan = CyPORTS_PER_CHIP *
4650 cyy_init_card(cy_isa_address, 0);
4651 if (cy_isa_nchan == 0) {
4652 continue;
4653 }
4654 #ifdef MODULE
4655 if (isparam && irq[i])
4656 cy_isa_irq = irq[i];
4657 else
4658 #endif
4659 /* find out the board's irq by probing */
4660 cy_isa_irq = detect_isa_irq(cy_isa_address);
4661 if (cy_isa_irq == 0) {
4662 printk("Cyclom-Y/ISA found at 0x%lx ",
4663 (unsigned long)cy_isa_address);
4664 printk("but the IRQ could not be detected.\n");
4665 continue;
4666 }
4667
4668 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4669 printk("Cyclom-Y/ISA found at 0x%lx ",
4670 (unsigned long)cy_isa_address);
4671 printk("but no more channels are available.\n");
4672 printk("Change NR_PORTS in cyclades.c and recompile "
4673 "kernel.\n");
4674 return nboard;
4675 }
4676 /* fill the next cy_card structure available */
4677 for (j = 0; j < NR_CARDS; j++) {
4678 if (cy_card[j].base_addr == 0)
4679 break;
4680 }
4681 if (j == NR_CARDS) { /* no more cy_cards available */
4682 printk("Cyclom-Y/ISA found at 0x%lx ",
4683 (unsigned long)cy_isa_address);
4684 printk("but no more cards can be used .\n");
4685 printk("Change NR_CARDS in cyclades.c and recompile "
4686 "kernel.\n");
4687 return nboard;
4688 }
4689
4690 /* allocate IRQ */
4691 if (request_irq(cy_isa_irq, cyy_interrupt,
4692 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4693 printk("Cyclom-Y/ISA found at 0x%lx ",
4694 (unsigned long)cy_isa_address);
4695 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4696 return nboard;
4697 }
4698
4699 /* set cy_card */
4700 cy_card[j].base_addr = cy_isa_address;
4701 cy_card[j].ctl_addr = NULL;
4702 cy_card[j].irq = (int)cy_isa_irq;
4703 cy_card[j].bus_index = 0;
4704 cy_card[j].first_line = cy_next_channel;
4705 cy_card[j].num_chips = cy_isa_nchan / 4;
4706 nboard++;
4707
4708 /* print message */
4709 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4710 j + 1, (unsigned long)cy_isa_address,
4711 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4712 cy_isa_irq);
4713 printk("%d channels starting from port %d.\n",
4714 cy_isa_nchan, cy_next_channel);
4715 cy_next_channel += cy_isa_nchan;
4716 }
4717 return nboard;
4718 #else
4719 return 0;
4720 #endif /* CONFIG_ISA */
4721 } /* cy_detect_isa */
4722
4723 static void plx_init(void __iomem * addr, uclong initctl)
4724 {
4725 /* Reset PLX */
4726 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4727 udelay(100L);
4728 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4729
4730 /* Reload Config. Registers from EEPROM */
4731 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4732 udelay(100L);
4733 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4734 }
4735
4736 /*
4737 * ---------------------------------------------------------------------
4738 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4739 * sets global variables and return the number of PCI boards found.
4740 * ---------------------------------------------------------------------
4741 */
4742 static int __init cy_detect_pci(void)
4743 {
4744 #ifdef CONFIG_PCI
4745
4746 struct pci_dev *pdev = NULL;
4747 unsigned char cyy_rev_id;
4748 unsigned char cy_pci_irq = 0;
4749 uclong cy_pci_phys0, cy_pci_phys2;
4750 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4751 unsigned short i, j, cy_pci_nchan, plx_ver;
4752 unsigned short device_id, dev_index = 0;
4753 uclong mailbox;
4754 uclong ZeIndex = 0;
4755 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4756 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4757 unsigned char Ze_irq[NR_CARDS];
4758 struct pci_dev *Ze_pdev[NR_CARDS];
4759
4760 for (i = 0; i < NR_CARDS; i++) {
4761 /* look for a Cyclades card by vendor and device id */
4762 while ((device_id = cy_pci_dev_id[dev_index]) != 0) {
4763 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4764 device_id, pdev)) == NULL) {
4765 dev_index++; /* try next device id */
4766 } else {
4767 break; /* found a board */
4768 }
4769 }
4770
4771 if (device_id == 0)
4772 break;
4773
4774 if (pci_enable_device(pdev))
4775 continue;
4776
4777 /* read PCI configuration area */
4778 cy_pci_irq = pdev->irq;
4779 cy_pci_phys0 = pci_resource_start(pdev, 0);
4780 cy_pci_phys2 = pci_resource_start(pdev, 2);
4781 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4782
4783 device_id &= ~PCI_DEVICE_ID_MASK;
4784
4785 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4786 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4787 #ifdef CY_PCI_DEBUG
4788 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4789 pdev->bus->number, pdev->devfn);
4790 printk("rev_id=%d) IRQ%d\n",
4791 cyy_rev_id, (int)cy_pci_irq);
4792 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4793 "ctladdr=0x%lx\n",
4794 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4795 #endif
4796
4797 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4798 printk(" Warning: PCI I/O bit incorrectly "
4799 "set. Ignoring it...\n");
4800 pdev->resource[2].flags &= ~IORESOURCE_IO;
4801 }
4802
4803 /* Although we don't use this I/O region, we should
4804 request it from the kernel anyway, to avoid problems
4805 with other drivers accessing it. */
4806 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4807 printk(KERN_ERR "cyclades: failed to reserve "
4808 "PCI resources\n");
4809 continue;
4810 }
4811 #if defined(__alpha__)
4812 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4813 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4814 pdev->bus->number, pdev->devfn);
4815 printk("rev_id=%d) IRQ%d\n",
4816 cyy_rev_id, (int)cy_pci_irq);
4817 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4818 "ctladdr=0x%lx\n",
4819 (ulong)cy_pci_phys2,
4820 (ulong)cy_pci_phys0);
4821 printk("Cyclom-Y/PCI not supported for low "
4822 "addresses in Alpha systems.\n");
4823 i--;
4824 continue;
4825 }
4826 #endif
4827 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4828 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4829
4830 #ifdef CY_PCI_DEBUG
4831 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4832 "ctladdr=0x%lx\n",
4833 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4834 #endif
4835 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4836 cyy_init_card(cy_pci_addr2, 1));
4837 if (cy_pci_nchan == 0) {
4838 printk("Cyclom-Y PCI host card with ");
4839 printk("no Serial-Modules at 0x%lx.\n",
4840 (ulong) cy_pci_phys2);
4841 i--;
4842 continue;
4843 }
4844 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4845 printk("Cyclom-Y/PCI found at 0x%lx ",
4846 (ulong) cy_pci_phys2);
4847 printk("but no channels are available.\n");
4848 printk("Change NR_PORTS in cyclades.c and "
4849 "recompile kernel.\n");
4850 return i;
4851 }
4852 /* fill the next cy_card structure available */
4853 for (j = 0; j < NR_CARDS; j++) {
4854 if (cy_card[j].base_addr == 0)
4855 break;
4856 }
4857 if (j == NR_CARDS) { /* no more cy_cards available */
4858 printk("Cyclom-Y/PCI found at 0x%lx ",
4859 (ulong) cy_pci_phys2);
4860 printk("but no more cards can be used.\n");
4861 printk("Change NR_CARDS in cyclades.c and "
4862 "recompile kernel.\n");
4863 return i;
4864 }
4865
4866 /* allocate IRQ */
4867 if (request_irq(cy_pci_irq, cyy_interrupt,
4868 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4869 printk("Cyclom-Y/PCI found at 0x%lx ",
4870 (ulong) cy_pci_phys2);
4871 printk("but could not allocate IRQ%d.\n",
4872 cy_pci_irq);
4873 return i;
4874 }
4875
4876 /* set cy_card */
4877 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4878 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4879 cy_card[j].base_addr = cy_pci_addr2;
4880 cy_card[j].ctl_addr = cy_pci_addr0;
4881 cy_card[j].irq = (int)cy_pci_irq;
4882 cy_card[j].bus_index = 1;
4883 cy_card[j].first_line = cy_next_channel;
4884 cy_card[j].num_chips = cy_pci_nchan / 4;
4885 cy_card[j].pdev = pdev;
4886
4887 /* enable interrupts in the PCI interface */
4888 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4889 switch (plx_ver) {
4890 case PLX_9050:
4891
4892 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4893 break;
4894
4895 case PLX_9060:
4896 case PLX_9080:
4897 default: /* Old boards, use PLX_9060 */
4898
4899 plx_init(cy_pci_addr0, 0x6c);
4900 /* For some yet unknown reason, once the PLX9060 reloads
4901 the EEPROM, the IRQ is lost and, thus, we have to
4902 re-write it to the PCI config. registers.
4903 This will remain here until we find a permanent
4904 fix. */
4905 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4906 cy_pci_irq);
4907
4908 cy_writew(cy_pci_addr0 + 0x68,
4909 cy_readw(cy_pci_addr0 +
4910 0x68) | 0x0900);
4911 break;
4912 }
4913
4914 /* print message */
4915 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4916 j + 1, (ulong)cy_pci_phys2,
4917 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4918 (int)cy_pci_irq);
4919 printk("%d channels starting from port %d.\n",
4920 cy_pci_nchan, cy_next_channel);
4921
4922 cy_next_channel += cy_pci_nchan;
4923 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4924 /* print message */
4925 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4926 pdev->bus->number, pdev->devfn);
4927 printk("rev_id=%d) IRQ%d\n",
4928 cyy_rev_id, (int)cy_pci_irq);
4929 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4930 "ctladdr=0x%lx\n",
4931 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4932 printk("Cyclades-Z/PCI not supported for low "
4933 "addresses\n");
4934 break;
4935 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4936 #ifdef CY_PCI_DEBUG
4937 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4938 pdev->bus->number, pdev->devfn);
4939 printk("rev_id=%d) IRQ%d\n",
4940 cyy_rev_id, (int)cy_pci_irq);
4941 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4942 "ctladdr=0x%lx\n",
4943 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
4944 #endif
4945 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4946
4947 /* Disable interrupts on the PLX before resetting it */
4948 cy_writew(cy_pci_addr0 + 0x68,
4949 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4950
4951 plx_init(cy_pci_addr0, 0x6c);
4952 /* For some yet unknown reason, once the PLX9060 reloads
4953 the EEPROM, the IRQ is lost and, thus, we have to
4954 re-write it to the PCI config. registers.
4955 This will remain here until we find a permanent
4956 fix. */
4957 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4958 cy_pci_irq);
4959
4960 mailbox =
4961 (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4962 cy_pci_addr0)->mail_box_0);
4963
4964 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4965 printk(" Warning: PCI I/O bit incorrectly "
4966 "set. Ignoring it...\n");
4967 pdev->resource[2].flags &= ~IORESOURCE_IO;
4968 }
4969
4970 /* Although we don't use this I/O region, we should
4971 request it from the kernel anyway, to avoid problems
4972 with other drivers accessing it. */
4973 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4974 printk(KERN_ERR "cyclades: failed to reserve "
4975 "PCI resources\n");
4976 continue;
4977 }
4978
4979 if (mailbox == ZE_V1) {
4980 cy_pci_addr2 = ioremap(cy_pci_phys2,
4981 CyPCI_Ze_win);
4982 if (ZeIndex == NR_CARDS) {
4983 printk("Cyclades-Ze/PCI found at "
4984 "0x%lx but no more cards can "
4985 "be used.\nChange NR_CARDS in "
4986 "cyclades.c and recompile "
4987 "kernel.\n",
4988 (ulong)cy_pci_phys2);
4989 } else {
4990 Ze_phys0[ZeIndex] = cy_pci_phys0;
4991 Ze_phys2[ZeIndex] = cy_pci_phys2;
4992 Ze_addr0[ZeIndex] = cy_pci_addr0;
4993 Ze_addr2[ZeIndex] = cy_pci_addr2;
4994 Ze_irq[ZeIndex] = cy_pci_irq;
4995 Ze_pdev[ZeIndex] = pdev;
4996 ZeIndex++;
4997 }
4998 i--;
4999 continue;
5000 } else {
5001 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5002 }
5003
5004 #ifdef CY_PCI_DEBUG
5005 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5006 "ctladdr=0x%lx\n",
5007 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5008 if (mailbox == ZO_V1) {
5009 cy_writel(&((struct RUNTIME_9060 *)
5010 (cy_pci_addr0))->loc_addr_base,
5011 WIN_CREG);
5012 PAUSE;
5013 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5014 "%lx\n", (ulong) (0xff &
5015 cy_readl(&((struct CUSTOM_REG *)
5016 (cy_pci_addr2))->fpga_id)),
5017 (ulong)(0xff &
5018 cy_readl(&((struct CUSTOM_REG *)
5019 (cy_pci_addr2))->
5020 fpga_version)));
5021 cy_writel(&((struct RUNTIME_9060 *)
5022 (cy_pci_addr0))->loc_addr_base,
5023 WIN_RAM);
5024 } else {
5025 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5026 "FPGA not loaded\n");
5027 }
5028 #endif
5029 /* The following clears the firmware id word. This
5030 ensures that the driver will not attempt to talk to
5031 the board until it has been properly initialized.
5032 */
5033 PAUSE;
5034 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5035 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5036
5037 /* This must be a Cyclades-8Zo/PCI. The extendable
5038 version will have a different device_id and will
5039 be allocated its maximum number of ports. */
5040 cy_pci_nchan = 8;
5041
5042 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5043 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5044 "no channels are available.\nChange "
5045 "NR_PORTS in cyclades.c and recompile "
5046 "kernel.\n", (ulong)cy_pci_phys2);
5047 return i;
5048 }
5049
5050 /* fill the next cy_card structure available */
5051 for (j = 0; j < NR_CARDS; j++) {
5052 if (cy_card[j].base_addr == 0)
5053 break;
5054 }
5055 if (j == NR_CARDS) { /* no more cy_cards available */
5056 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5057 "no more cards can be used.\nChange "
5058 "NR_CARDS in cyclades.c and recompile "
5059 "kernel.\n", (ulong)cy_pci_phys2);
5060 return i;
5061 }
5062 #ifdef CONFIG_CYZ_INTR
5063 /* allocate IRQ only if board has an IRQ */
5064 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5065 if (request_irq(cy_pci_irq, cyz_interrupt,
5066 IRQF_SHARED, "Cyclades-Z",
5067 &cy_card[j])) {
5068 printk("Cyclom-8Zo/PCI found at 0x%lx "
5069 "but could not allocate "
5070 "IRQ%d.\n", (ulong)cy_pci_phys2,
5071 cy_pci_irq);
5072 return i;
5073 }
5074 }
5075 #endif /* CONFIG_CYZ_INTR */
5076
5077 /* set cy_card */
5078 cy_card[j].base_phys = cy_pci_phys2;
5079 cy_card[j].ctl_phys = cy_pci_phys0;
5080 cy_card[j].base_addr = cy_pci_addr2;
5081 cy_card[j].ctl_addr = cy_pci_addr0;
5082 cy_card[j].irq = (int)cy_pci_irq;
5083 cy_card[j].bus_index = 1;
5084 cy_card[j].first_line = cy_next_channel;
5085 cy_card[j].num_chips = -1;
5086 cy_card[j].pdev = pdev;
5087
5088 /* print message */
5089 #ifdef CONFIG_CYZ_INTR
5090 /* don't report IRQ if board is no IRQ */
5091 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5092 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5093 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5094 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5095 (int)cy_pci_irq);
5096 else
5097 #endif /* CONFIG_CYZ_INTR */
5098 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5099 j + 1, (ulong)cy_pci_phys2,
5100 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5101
5102 printk("%d channels starting from port %d.\n",
5103 cy_pci_nchan, cy_next_channel);
5104 cy_next_channel += cy_pci_nchan;
5105 }
5106 }
5107
5108 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5109 cy_pci_phys0 = Ze_phys0[0];
5110 cy_pci_phys2 = Ze_phys2[0];
5111 cy_pci_addr0 = Ze_addr0[0];
5112 cy_pci_addr2 = Ze_addr2[0];
5113 cy_pci_irq = Ze_irq[0];
5114 pdev = Ze_pdev[0];
5115 for (j = 0; j < ZeIndex - 1; j++) {
5116 Ze_phys0[j] = Ze_phys0[j + 1];
5117 Ze_phys2[j] = Ze_phys2[j + 1];
5118 Ze_addr0[j] = Ze_addr0[j + 1];
5119 Ze_addr2[j] = Ze_addr2[j + 1];
5120 Ze_irq[j] = Ze_irq[j + 1];
5121 Ze_pdev[j] = Ze_pdev[j + 1];
5122 }
5123 ZeIndex--;
5124 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5125 cy_pci_addr0)->mail_box_0);
5126 #ifdef CY_PCI_DEBUG
5127 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5128 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5129 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5130 "loaded\n");
5131 #endif
5132 PAUSE;
5133 /* This must be the new Cyclades-Ze/PCI. */
5134 cy_pci_nchan = ZE_V1_NPORTS;
5135
5136 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5137 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5138 "are available.\nChange NR_PORTS in cyclades.c "
5139 "and recompile kernel.\n",
5140 (ulong) cy_pci_phys2);
5141 return i;
5142 }
5143
5144 /* fill the next cy_card structure available */
5145 for (j = 0; j < NR_CARDS; j++) {
5146 if (cy_card[j].base_addr == 0)
5147 break;
5148 }
5149 if (j == NR_CARDS) { /* no more cy_cards available */
5150 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5151 "cards can be used.\nChange NR_CARDS in "
5152 "cyclades.c and recompile kernel.\n",
5153 (ulong) cy_pci_phys2);
5154 return i;
5155 }
5156 #ifdef CONFIG_CYZ_INTR
5157 /* allocate IRQ only if board has an IRQ */
5158 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5159 if (request_irq(cy_pci_irq, cyz_interrupt,
5160 IRQF_SHARED, "Cyclades-Z",
5161 &cy_card[j])) {
5162 printk("Cyclom-Ze/PCI found at 0x%lx ",
5163 (ulong) cy_pci_phys2);
5164 printk("but could not allocate IRQ%d.\n",
5165 cy_pci_irq);
5166 return i;
5167 }
5168 }
5169 #endif /* CONFIG_CYZ_INTR */
5170
5171 /* set cy_card */
5172 cy_card[j].base_phys = cy_pci_phys2;
5173 cy_card[j].ctl_phys = cy_pci_phys0;
5174 cy_card[j].base_addr = cy_pci_addr2;
5175 cy_card[j].ctl_addr = cy_pci_addr0;
5176 cy_card[j].irq = (int)cy_pci_irq;
5177 cy_card[j].bus_index = 1;
5178 cy_card[j].first_line = cy_next_channel;
5179 cy_card[j].num_chips = -1;
5180 cy_card[j].pdev = pdev;
5181
5182 /* print message */
5183 #ifdef CONFIG_CYZ_INTR
5184 /* don't report IRQ if board is no IRQ */
5185 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5186 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5187 j + 1, (ulong) cy_pci_phys2,
5188 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5189 (int)cy_pci_irq);
5190 else
5191 #endif /* CONFIG_CYZ_INTR */
5192 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5193 j + 1, (ulong) cy_pci_phys2,
5194 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5195
5196 printk("%d channels starting from port %d.\n",
5197 cy_pci_nchan, cy_next_channel);
5198 cy_next_channel += cy_pci_nchan;
5199 }
5200 if (ZeIndex != 0) {
5201 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5202 "used.\nChange NR_CARDS in cyclades.c and recompile "
5203 "kernel.\n", (unsigned int)Ze_phys2[0]);
5204 }
5205 return i;
5206 #else
5207 return 0;
5208 #endif /* ifdef CONFIG_PCI */
5209 } /* cy_detect_pci */
5210
5211 /*
5212 * This routine prints out the appropriate serial driver version number
5213 * and identifies which options were configured into this driver.
5214 */
5215 static inline void show_version(void)
5216 {
5217 printk("Cyclades driver " CY_VERSION "\n");
5218 printk(" built %s %s\n", __DATE__, __TIME__);
5219 } /* show_version */
5220
5221 static int
5222 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5223 int *eof, void *data)
5224 {
5225 struct cyclades_port *info;
5226 int i;
5227 int len = 0;
5228 off_t begin = 0;
5229 off_t pos = 0;
5230 int size;
5231 __u32 cur_jifs = jiffies;
5232
5233 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5234 "IdleIn Overruns Ldisc\n");
5235
5236 pos += size;
5237 len += size;
5238
5239 /* Output one line for each known port */
5240 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5241 info = &cy_port[i];
5242
5243 if (info->count)
5244 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5245 "%8lu %9lu %6ld\n", info->line,
5246 (cur_jifs - info->idle_stats.in_use) / HZ,
5247 info->idle_stats.xmit_bytes,
5248 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5249 info->idle_stats.recv_bytes,
5250 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5251 info->idle_stats.overruns,
5252 (long)info->tty->ldisc.num);
5253 else
5254 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5255 "%8lu %9lu %6ld\n",
5256 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5257 len += size;
5258 pos = begin + len;
5259
5260 if (pos < offset) {
5261 len = 0;
5262 begin = pos;
5263 }
5264 if (pos > offset + length)
5265 goto done;
5266 }
5267 *eof = 1;
5268 done:
5269 *start = buf + (offset - begin); /* Start of wanted data */
5270 len -= (offset - begin); /* Start slop */
5271 if (len > length)
5272 len = length; /* Ending slop */
5273 if (len < 0)
5274 len = 0;
5275 return len;
5276 }
5277
5278 /* The serial driver boot-time initialization code!
5279 Hardware I/O ports are mapped to character special devices on a
5280 first found, first allocated manner. That is, this code searches
5281 for Cyclom cards in the system. As each is found, it is probed
5282 to discover how many chips (and thus how many ports) are present.
5283 These ports are mapped to the tty ports 32 and upward in monotonic
5284 fashion. If an 8-port card is replaced with a 16-port card, the
5285 port mapping on a following card will shift.
5286
5287 This approach is different from what is used in the other serial
5288 device driver because the Cyclom is more properly a multiplexer,
5289 not just an aggregation of serial ports on one card.
5290
5291 If there are more cards with more ports than have been
5292 statically allocated above, a warning is printed and the
5293 extra ports are ignored.
5294 */
5295
5296 static const struct tty_operations cy_ops = {
5297 .open = cy_open,
5298 .close = cy_close,
5299 .write = cy_write,
5300 .put_char = cy_put_char,
5301 .flush_chars = cy_flush_chars,
5302 .write_room = cy_write_room,
5303 .chars_in_buffer = cy_chars_in_buffer,
5304 .flush_buffer = cy_flush_buffer,
5305 .ioctl = cy_ioctl,
5306 .throttle = cy_throttle,
5307 .unthrottle = cy_unthrottle,
5308 .set_termios = cy_set_termios,
5309 .stop = cy_stop,
5310 .start = cy_start,
5311 .hangup = cy_hangup,
5312 .break_ctl = cy_break,
5313 .wait_until_sent = cy_wait_until_sent,
5314 .read_proc = cyclades_get_proc_info,
5315 .tiocmget = cy_tiocmget,
5316 .tiocmset = cy_tiocmset,
5317 };
5318
5319 static int __init cy_init(void)
5320 {
5321 struct cyclades_port *info;
5322 struct cyclades_card *cinfo;
5323 int number_z_boards = 0;
5324 int board, port, i, index;
5325 unsigned long mailbox;
5326 unsigned short chip_number;
5327 int nports;
5328
5329 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5330 if (!cy_serial_driver)
5331 return -ENOMEM;
5332 show_version();
5333
5334 /* Initialize the tty_driver structure */
5335
5336 cy_serial_driver->owner = THIS_MODULE;
5337 cy_serial_driver->driver_name = "cyclades";
5338 cy_serial_driver->name = "ttyC";
5339 cy_serial_driver->major = CYCLADES_MAJOR;
5340 cy_serial_driver->minor_start = 0;
5341 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5342 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5343 cy_serial_driver->init_termios = tty_std_termios;
5344 cy_serial_driver->init_termios.c_cflag =
5345 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5346 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5347 tty_set_operations(cy_serial_driver, &cy_ops);
5348
5349 if (tty_register_driver(cy_serial_driver))
5350 panic("Couldn't register Cyclades serial driver\n");
5351
5352 for (i = 0; i < NR_CARDS; i++) {
5353 /* base_addr=0 indicates board not found */
5354 cy_card[i].base_addr = NULL;
5355 }
5356
5357 /* the code below is responsible to find the boards. Each different
5358 type of board has its own detection routine. If a board is found,
5359 the next cy_card structure available is set by the detection
5360 routine. These functions are responsible for checking the
5361 availability of cy_card and cy_port data structures and updating
5362 the cy_next_channel. */
5363
5364 /* look for isa boards */
5365 cy_isa_nboard = cy_detect_isa();
5366
5367 /* look for pci boards */
5368 cy_pci_nboard = cy_detect_pci();
5369
5370 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5371
5372 /* invalidate remaining cy_card structures */
5373 for (i = 0; i < NR_CARDS; i++) {
5374 if (cy_card[i].base_addr == 0) {
5375 cy_card[i].first_line = -1;
5376 cy_card[i].ctl_addr = NULL;
5377 cy_card[i].irq = 0;
5378 cy_card[i].bus_index = 0;
5379 cy_card[i].first_line = 0;
5380 cy_card[i].num_chips = 0;
5381 }
5382 }
5383 /* invalidate remaining cy_port structures */
5384 for (i = cy_next_channel; i < NR_PORTS; i++) {
5385 cy_port[i].line = -1;
5386 cy_port[i].magic = -1;
5387 }
5388
5389 /* initialize per-port data structures for each valid board found */
5390 for (board = 0; board < cy_nboard; board++) {
5391 cinfo = &cy_card[board];
5392 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5393 number_z_boards++;
5394 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5395 cy_card[board].ctl_addr)->
5396 mail_box_0);
5397 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5398 cinfo->intr_enabled = 0;
5399 cinfo->nports = 0; /* Will be correctly set later, after
5400 Z FW is loaded */
5401 spin_lock_init(&cinfo->card_lock);
5402 for (port = cinfo->first_line;
5403 port < cinfo->first_line + nports; port++) {
5404 info = &cy_port[port];
5405 info->magic = CYCLADES_MAGIC;
5406 info->type = PORT_STARTECH;
5407 info->card = board;
5408 info->line = port;
5409 info->chip_rev = 0;
5410 info->flags = STD_COM_FLAGS;
5411 info->tty = NULL;
5412 if (mailbox == ZO_V1)
5413 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5414 else
5415 info->xmit_fifo_size =
5416 4 * CYZ_FIFO_SIZE;
5417 info->cor1 = 0;
5418 info->cor2 = 0;
5419 info->cor3 = 0;
5420 info->cor4 = 0;
5421 info->cor5 = 0;
5422 info->tbpr = 0;
5423 info->tco = 0;
5424 info->rbpr = 0;
5425 info->rco = 0;
5426 info->custom_divisor = 0;
5427 info->close_delay = 5 * HZ / 10;
5428 info->closing_wait = CLOSING_WAIT_DELAY;
5429 info->icount.cts = info->icount.dsr =
5430 info->icount.rng = info->icount.dcd = 0;
5431 info->icount.rx = info->icount.tx = 0;
5432 info->icount.frame = info->icount.parity = 0;
5433 info->icount.overrun = info->icount.brk = 0;
5434 info->x_char = 0;
5435 info->event = 0;
5436 info->count = 0;
5437 info->blocked_open = 0;
5438 info->default_threshold = 0;
5439 info->default_timeout = 0;
5440 INIT_WORK(&info->tqueue, do_softint);
5441 init_waitqueue_head(&info->open_wait);
5442 init_waitqueue_head(&info->close_wait);
5443 init_waitqueue_head(&info->shutdown_wait);
5444 init_waitqueue_head(&info->delta_msr_wait);
5445 /* info->session */
5446 /* info->pgrp */
5447 info->read_status_mask = 0;
5448 /* info->timeout */
5449 /* Bentson's vars */
5450 info->jiffies[0] = 0;
5451 info->jiffies[1] = 0;
5452 info->jiffies[2] = 0;
5453 info->rflush_count = 0;
5454 #ifdef CONFIG_CYZ_INTR
5455 init_timer(&cyz_rx_full_timer[port]);
5456 cyz_rx_full_timer[port].function = NULL;
5457 #endif
5458 }
5459 continue;
5460 } else { /* Cyclom-Y of some kind */
5461 index = cinfo->bus_index;
5462 spin_lock_init(&cinfo->card_lock);
5463 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5464 for (port = cinfo->first_line;
5465 port < cinfo->first_line + cinfo->nports; port++) {
5466 info = &cy_port[port];
5467 info->magic = CYCLADES_MAGIC;
5468 info->type = PORT_CIRRUS;
5469 info->card = board;
5470 info->line = port;
5471 info->flags = STD_COM_FLAGS;
5472 info->tty = NULL;
5473 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5474 info->cor1 =
5475 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5476 info->cor2 = CyETC;
5477 info->cor3 = 0x08; /* _very_ small rcv threshold */
5478 info->cor4 = 0;
5479 info->cor5 = 0;
5480 info->custom_divisor = 0;
5481 info->close_delay = 5 * HZ / 10;
5482 info->closing_wait = CLOSING_WAIT_DELAY;
5483 info->icount.cts = info->icount.dsr =
5484 info->icount.rng = info->icount.dcd = 0;
5485 info->icount.rx = info->icount.tx = 0;
5486 info->icount.frame = info->icount.parity = 0;
5487 info->icount.overrun = info->icount.brk = 0;
5488 chip_number = (port - cinfo->first_line) / 4;
5489 if ((info->chip_rev =
5490 cy_readb(cinfo->base_addr +
5491 (cy_chip_offset[chip_number] <<
5492 index) + (CyGFRCR << index))) >=
5493 CD1400_REV_J) {
5494 /* It is a CD1400 rev. J or later */
5495 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5496 info->tco = baud_co_60[13]; /* Tx CO */
5497 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5498 info->rco = baud_co_60[13]; /* Rx CO */
5499 info->rflow = 0;
5500 info->rtsdtr_inv = 1;
5501 } else {
5502 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5503 info->tco = baud_co_25[13]; /* Tx CO */
5504 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5505 info->rco = baud_co_25[13]; /* Rx CO */
5506 info->rflow = 0;
5507 info->rtsdtr_inv = 0;
5508 }
5509 info->x_char = 0;
5510 info->event = 0;
5511 info->count = 0;
5512 info->blocked_open = 0;
5513 info->default_threshold = 0;
5514 info->default_timeout = 0;
5515 INIT_WORK(&info->tqueue, do_softint);
5516 init_waitqueue_head(&info->open_wait);
5517 init_waitqueue_head(&info->close_wait);
5518 init_waitqueue_head(&info->shutdown_wait);
5519 init_waitqueue_head(&info->delta_msr_wait);
5520 /* info->session */
5521 /* info->pgrp */
5522 info->read_status_mask =
5523 CyTIMEOUT | CySPECHAR | CyBREAK
5524 | CyPARITY | CyFRAME | CyOVERRUN;
5525 /* info->timeout */
5526 }
5527 }
5528 }
5529
5530 #ifndef CONFIG_CYZ_INTR
5531 if (number_z_boards && !cyz_timeron) {
5532 cyz_timeron++;
5533 cyz_timerlist.expires = jiffies + 1;
5534 add_timer(&cyz_timerlist);
5535 #ifdef CY_PCI_DEBUG
5536 printk("Cyclades-Z polling initialized\n");
5537 #endif
5538 }
5539 #endif /* CONFIG_CYZ_INTR */
5540
5541 return 0;
5542
5543 } /* cy_init */
5544
5545 static void __exit cy_cleanup_module(void)
5546 {
5547 int i, e1;
5548
5549 #ifndef CONFIG_CYZ_INTR
5550 if (cyz_timeron){
5551 cyz_timeron = 0;
5552 del_timer(&cyz_timerlist);
5553 }
5554 #endif /* CONFIG_CYZ_INTR */
5555
5556 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5557 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5558 e1);
5559
5560 put_tty_driver(cy_serial_driver);
5561
5562 for (i = 0; i < NR_CARDS; i++) {
5563 if (cy_card[i].base_addr) {
5564 iounmap(cy_card[i].base_addr);
5565 if (cy_card[i].ctl_addr)
5566 iounmap(cy_card[i].ctl_addr);
5567 if (cy_card[i].irq
5568 #ifndef CONFIG_CYZ_INTR
5569 && cy_card[i].num_chips != -1 /* not a Z card */
5570 #endif /* CONFIG_CYZ_INTR */
5571 )
5572 free_irq(cy_card[i].irq, &cy_card[i]);
5573 #ifdef CONFIG_PCI
5574 if (cy_card[i].pdev)
5575 pci_release_regions(cy_card[i].pdev);
5576 #endif
5577 }
5578 }
5579 } /* cy_cleanup_module */
5580
5581 module_init(cy_init);
5582 module_exit(cy_cleanup_module);
5583
5584 MODULE_LICENSE("GPL");
Linux with added FPC-III support