3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
594 /* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
611 #define SERIAL_PARANOIA_CHECK
613 #undef CY_DEBUG_THROTTLE
614 #undef CY_DEBUG_OTHER
616 #undef CY_DEBUG_COUNT
618 #undef CY_DEBUG_WAIT_UNTIL_SENT
619 #undef CY_DEBUG_INTERRUPTS
621 #undef CY_ENABLE_MONITORING
627 #include <linux/module.h>
628 #include <linux/errno.h>
629 #include <linux/signal.h>
630 #include <linux/sched.h>
631 #include <linux/timer.h>
632 #include <linux/interrupt.h>
633 #include <linux/tty.h>
634 #include <linux/tty_flip.h>
635 #include <linux/serial.h>
636 #include <linux/smp_lock.h>
637 #include <linux/major.h>
638 #include <linux/string.h>
639 #include <linux/fcntl.h>
640 #include <linux/ptrace.h>
641 #include <linux/cyclades.h>
642 #include <linux/mm.h>
643 #include <linux/ioport.h>
644 #include <linux/init.h>
645 #include <linux/delay.h>
646 #include <linux/spinlock.h>
647 #include <linux/bitops.h>
648 #include <linux/firmware.h>
649 #include <linux/device.h>
651 #include <asm/system.h>
652 #include <linux/io.h>
654 #include <linux/uaccess.h>
656 #include <linux/kernel.h>
657 #include <linux/pci.h>
659 #include <linux/stat.h>
660 #include <linux/proc_fs.h>
661 #include <linux/seq_file.h>
663 static void cy_throttle(struct tty_struct *tty);
664 static void cy_send_xchar(struct tty_struct *tty, char ch);
666 #ifndef SERIAL_XMIT_SIZE
667 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
669 #define WAKEUP_CHARS 256
671 #define STD_COM_FLAGS (0)
674 #define ZL_MAX_BLOCKS 16
675 #define DRIVER_VERSION 0x02010203
676 #define RAM_SIZE 0x80000
683 struct zfile_header {
692 } __attribute__ ((packed));
694 struct zfile_config {
699 u32 block_list[ZL_MAX_BLOCKS];
700 } __attribute__ ((packed));
707 } __attribute__ ((packed));
709 static struct tty_driver *cy_serial_driver;
712 /* This is the address lookup table. The driver will probe for
713 Cyclom-Y/ISA boards at all addresses in here. If you want the
714 driver to probe addresses at a different address, add it to
715 this table. If the driver is probing some other board and
716 causing problems, remove the offending address from this table.
719 static unsigned int cy_isa_addresses[] = {
728 0, 0, 0, 0, 0, 0, 0, 0
731 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
734 static long maddr[NR_CARDS];
735 static int irq[NR_CARDS];
737 module_param_array(maddr, long, NULL, 0);
738 module_param_array(irq, int, NULL, 0);
741 #endif /* CONFIG_ISA */
743 /* This is the per-card data structure containing address, irq, number of
744 channels, etc. This driver supports a maximum of NR_CARDS cards.
746 static struct cyclades_card cy_card[NR_CARDS];
748 static int cy_next_channel; /* next minor available */
751 * This is used to look up the divisor speeds and the timeouts
752 * We're normally limited to 15 distinct baud rates. The extra
753 * are accessed via settings in info->port.flags.
754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
759 static int baud_table[] = {
760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
765 static char baud_co_25[] = { /* 25 MHz clock option table */
766 /* value => 00 01 02 03 04 */
767 /* divide by 8 32 128 512 2048 */
768 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
769 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
772 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
773 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
774 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
777 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
781 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
785 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
786 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
787 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
791 static char baud_cor3[] = { /* receive threshold */
792 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
798 * The Cyclades driver implements HW flow control as any serial driver.
799 * The cyclades_port structure member rflow and the vector rflow_thr
800 * allows us to take advantage of a special feature in the CD1400 to avoid
801 * data loss even when the system interrupt latency is too high. These flags
802 * are to be used only with very special applications. Setting these flags
803 * requires the use of a special cable (DTR and RTS reversed). In the new
804 * CD1400-based boards (rev. 6.00 or later), there is no need for special
808 static char rflow_thr[] = { /* rflow threshold */
809 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
810 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
814 /* The Cyclom-Ye has placed the sequential chips in non-sequential
815 * address order. This look-up table overcomes that problem.
817 static int cy_chip_offset[] = { 0x0000,
827 /* PCI related definitions */
830 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
840 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
842 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
847 { } /* end of table */
849 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
852 static void cy_start(struct tty_struct *);
853 static void set_line_char(struct cyclades_port *);
854 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
856 static unsigned detect_isa_irq(void __iomem *);
857 #endif /* CONFIG_ISA */
859 #ifndef CONFIG_CYZ_INTR
860 static void cyz_poll(unsigned long);
862 /* The Cyclades-Z polling cycle is defined by this variable */
863 static long cyz_polling_cycle = CZ_DEF_POLL;
865 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
867 #else /* CONFIG_CYZ_INTR */
868 static void cyz_rx_restart(unsigned long);
869 static struct timer_list cyz_rx_full_timer[NR_PORTS];
870 #endif /* CONFIG_CYZ_INTR */
872 static inline bool cy_is_Z(struct cyclades_card *card)
874 return card->num_chips == (unsigned int)-1;
877 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
879 return readl(&ctl_addr->init_ctrl) & (1 << 17);
882 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
884 return __cyz_fpga_loaded(card->ctl_addr.p9060);
887 static inline bool cyz_is_loaded(struct cyclades_card *card)
889 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
891 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
892 readl(&fw_id->signature) == ZFIRM_ID;
895 static inline int serial_paranoia_check(struct cyclades_port *info,
896 char *name, const char *routine)
898 #ifdef SERIAL_PARANOIA_CHECK
900 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
901 "in %s\n", name, routine);
905 if (info->magic != CYCLADES_MAGIC) {
906 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
907 "struct (%s) in %s\n", name, routine);
912 } /* serial_paranoia_check */
914 /***********************************************************/
915 /********* Start of block of Cyclom-Y specific code ********/
917 /* This routine waits up to 1000 micro-seconds for the previous
918 command to the Cirrus chip to complete and then issues the
919 new command. An error is returned if the previous command
920 didn't finish within the time limit.
922 This function is only called from inside spinlock-protected code.
924 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
928 /* Check to see that the previous command has completed */
929 for (i = 0; i < 100; i++) {
930 if (readb(base_addr + (CyCCR << index)) == 0)
934 /* if the CCR never cleared, the previous command
935 didn't finish within the "reasonable time" */
939 /* Issue the new command */
940 cy_writeb(base_addr + (CyCCR << index), cmd);
943 } /* cyy_issue_cmd */
946 /* ISA interrupt detection code */
947 static unsigned detect_isa_irq(void __iomem *address)
950 unsigned long irqs, flags;
951 int save_xir, save_car;
952 int index = 0; /* IRQ probing is only for ISA */
954 /* forget possible initially masked and pending IRQ */
955 irq = probe_irq_off(probe_irq_on());
957 /* Clear interrupts on the board first */
958 cy_writeb(address + (Cy_ClrIntr << index), 0);
959 /* Cy_ClrIntr is 0x1800 */
961 irqs = probe_irq_on();
965 /* Enable the Tx interrupts on the CD1400 */
966 local_irq_save(flags);
967 cy_writeb(address + (CyCAR << index), 0);
968 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
970 cy_writeb(address + (CyCAR << index), 0);
971 cy_writeb(address + (CySRER << index),
972 readb(address + (CySRER << index)) | CyTxRdy);
973 local_irq_restore(flags);
978 /* Check which interrupt is in use */
979 irq = probe_irq_off(irqs);
982 save_xir = (u_char) readb(address + (CyTIR << index));
983 save_car = readb(address + (CyCAR << index));
984 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
985 cy_writeb(address + (CySRER << index),
986 readb(address + (CySRER << index)) & ~CyTxRdy);
987 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
988 cy_writeb(address + (CyCAR << index), (save_car));
989 cy_writeb(address + (Cy_ClrIntr << index), 0);
990 /* Cy_ClrIntr is 0x1800 */
992 return (irq > 0) ? irq : 0;
994 #endif /* CONFIG_ISA */
996 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
997 void __iomem *base_addr)
999 struct cyclades_port *info;
1000 struct tty_struct *tty;
1001 int len, index = cinfo->bus_index;
1002 u8 save_xir, channel, save_car, data, char_count;
1004 #ifdef CY_DEBUG_INTERRUPTS
1005 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1007 /* determine the channel & change to that context */
1008 save_xir = readb(base_addr + (CyRIR << index));
1009 channel = save_xir & CyIRChannel;
1010 info = &cinfo->ports[channel + chip * 4];
1011 save_car = readb(base_addr + (CyCAR << index));
1012 cy_writeb(base_addr + (CyCAR << index), save_xir);
1014 /* if there is nowhere to put the data, discard it */
1015 if (info->port.tty == NULL) {
1016 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1017 CyIVRRxEx) { /* exception */
1018 data = readb(base_addr + (CyRDSR << index));
1019 } else { /* normal character reception */
1020 char_count = readb(base_addr + (CyRDCR << index));
1021 while (char_count--)
1022 data = readb(base_addr + (CyRDSR << index));
1026 /* there is an open port for this data */
1027 tty = info->port.tty;
1028 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1029 CyIVRRxEx) { /* exception */
1030 data = readb(base_addr + (CyRDSR << index));
1032 /* For statistics only */
1035 else if (data & CyFRAME)
1036 info->icount.frame++;
1037 else if (data & CyPARITY)
1038 info->icount.parity++;
1039 else if (data & CyOVERRUN)
1040 info->icount.overrun++;
1042 if (data & info->ignore_status_mask) {
1046 if (tty_buffer_request_room(tty, 1)) {
1047 if (data & info->read_status_mask) {
1048 if (data & CyBREAK) {
1049 tty_insert_flip_char(tty,
1050 readb(base_addr + (CyRDSR <<
1051 index)), TTY_BREAK);
1053 if (info->port.flags & ASYNC_SAK)
1055 } else if (data & CyFRAME) {
1056 tty_insert_flip_char(tty,
1057 readb(base_addr + (CyRDSR <<
1058 index)), TTY_FRAME);
1060 info->idle_stats.frame_errs++;
1061 } else if (data & CyPARITY) {
1062 /* Pieces of seven... */
1063 tty_insert_flip_char(tty,
1064 readb(base_addr + (CyRDSR <<
1065 index)), TTY_PARITY);
1067 info->idle_stats.parity_errs++;
1068 } else if (data & CyOVERRUN) {
1069 tty_insert_flip_char(tty, 0,
1072 /* If the flip buffer itself is
1073 overflowing, we still lose
1074 the next incoming character.
1076 tty_insert_flip_char(tty,
1077 readb(base_addr + (CyRDSR <<
1078 index)), TTY_FRAME);
1080 info->idle_stats.overruns++;
1081 /* These two conditions may imply */
1082 /* a normal read should be done. */
1083 /* } else if(data & CyTIMEOUT) { */
1084 /* } else if(data & CySPECHAR) { */
1086 tty_insert_flip_char(tty, 0,
1091 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1095 /* there was a software buffer overrun and nothing
1096 * could be done about it!!! */
1097 info->icount.buf_overrun++;
1098 info->idle_stats.overruns++;
1100 } else { /* normal character reception */
1101 /* load # chars available from the chip */
1102 char_count = readb(base_addr + (CyRDCR << index));
1104 #ifdef CY_ENABLE_MONITORING
1105 ++info->mon.int_count;
1106 info->mon.char_count += char_count;
1107 if (char_count > info->mon.char_max)
1108 info->mon.char_max = char_count;
1109 info->mon.char_last = char_count;
1111 len = tty_buffer_request_room(tty, char_count);
1113 data = readb(base_addr + (CyRDSR << index));
1114 tty_insert_flip_char(tty, data, TTY_NORMAL);
1115 info->idle_stats.recv_bytes++;
1121 info->idle_stats.recv_idle = jiffies;
1123 tty_schedule_flip(tty);
1125 /* end of service */
1126 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1127 cy_writeb(base_addr + (CyCAR << index), save_car);
1130 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1131 void __iomem *base_addr)
1133 struct cyclades_port *info;
1134 int char_count, index = cinfo->bus_index;
1135 u8 save_xir, channel, save_car, outch;
1137 /* Since we only get here when the transmit buffer
1138 is empty, we know we can always stuff a dozen
1140 #ifdef CY_DEBUG_INTERRUPTS
1141 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1144 /* determine the channel & change to that context */
1145 save_xir = readb(base_addr + (CyTIR << index));
1146 channel = save_xir & CyIRChannel;
1147 save_car = readb(base_addr + (CyCAR << index));
1148 cy_writeb(base_addr + (CyCAR << index), save_xir);
1150 /* validate the port# (as configured and open) */
1151 if (channel + chip * 4 >= cinfo->nports) {
1152 cy_writeb(base_addr + (CySRER << index),
1153 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1156 info = &cinfo->ports[channel + chip * 4];
1157 if (info->port.tty == NULL) {
1158 cy_writeb(base_addr + (CySRER << index),
1159 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1163 /* load the on-chip space for outbound data */
1164 char_count = info->xmit_fifo_size;
1166 if (info->x_char) { /* send special char */
1167 outch = info->x_char;
1168 cy_writeb(base_addr + (CyTDR << index), outch);
1174 if (info->breakon || info->breakoff) {
1175 if (info->breakon) {
1176 cy_writeb(base_addr + (CyTDR << index), 0);
1177 cy_writeb(base_addr + (CyTDR << index), 0x81);
1181 if (info->breakoff) {
1182 cy_writeb(base_addr + (CyTDR << index), 0);
1183 cy_writeb(base_addr + (CyTDR << index), 0x83);
1189 while (char_count-- > 0) {
1190 if (!info->xmit_cnt) {
1191 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1192 cy_writeb(base_addr + (CySRER << index),
1193 readb(base_addr + (CySRER << index)) &
1196 cy_writeb(base_addr + (CySRER << index),
1197 (readb(base_addr + (CySRER << index)) &
1198 ~CyTxRdy) | CyTxMpty);
1202 if (info->port.xmit_buf == NULL) {
1203 cy_writeb(base_addr + (CySRER << index),
1204 readb(base_addr + (CySRER << index)) &
1208 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1209 cy_writeb(base_addr + (CySRER << index),
1210 readb(base_addr + (CySRER << index)) &
1214 /* Because the Embedded Transmit Commands have been enabled,
1215 * we must check to see if the escape character, NULL, is being
1216 * sent. If it is, we must ensure that there is room for it to
1217 * be doubled in the output stream. Therefore we no longer
1218 * advance the pointer when the character is fetched, but
1219 * rather wait until after the check for a NULL output
1220 * character. This is necessary because there may not be room
1221 * for the two chars needed to send a NULL.)
1223 outch = info->port.xmit_buf[info->xmit_tail];
1226 info->xmit_tail = (info->xmit_tail + 1) &
1227 (SERIAL_XMIT_SIZE - 1);
1228 cy_writeb(base_addr + (CyTDR << index), outch);
1231 if (char_count > 1) {
1233 info->xmit_tail = (info->xmit_tail + 1) &
1234 (SERIAL_XMIT_SIZE - 1);
1235 cy_writeb(base_addr + (CyTDR << index), outch);
1236 cy_writeb(base_addr + (CyTDR << index), 0);
1244 tty_wakeup(info->port.tty);
1246 /* end of service */
1247 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1248 cy_writeb(base_addr + (CyCAR << index), save_car);
1251 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1252 void __iomem *base_addr)
1254 struct cyclades_port *info;
1255 int index = cinfo->bus_index;
1256 u8 save_xir, channel, save_car, mdm_change, mdm_status;
1258 /* determine the channel & change to that context */
1259 save_xir = readb(base_addr + (CyMIR << index));
1260 channel = save_xir & CyIRChannel;
1261 info = &cinfo->ports[channel + chip * 4];
1262 save_car = readb(base_addr + (CyCAR << index));
1263 cy_writeb(base_addr + (CyCAR << index), save_xir);
1265 mdm_change = readb(base_addr + (CyMISR << index));
1266 mdm_status = readb(base_addr + (CyMSVR1 << index));
1268 if (!info->port.tty)
1271 if (mdm_change & CyANY_DELTA) {
1272 /* For statistics only */
1273 if (mdm_change & CyDCD)
1275 if (mdm_change & CyCTS)
1277 if (mdm_change & CyDSR)
1279 if (mdm_change & CyRI)
1282 wake_up_interruptible(&info->delta_msr_wait);
1285 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1286 if (!(mdm_status & CyDCD)) {
1287 tty_hangup(info->port.tty);
1288 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1290 wake_up_interruptible(&info->port.open_wait);
1292 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1293 if (info->port.tty->hw_stopped) {
1294 if (mdm_status & CyCTS) {
1295 /* cy_start isn't used
1297 info->port.tty->hw_stopped = 0;
1298 cy_writeb(base_addr + (CySRER << index),
1299 readb(base_addr + (CySRER << index)) |
1301 tty_wakeup(info->port.tty);
1304 if (!(mdm_status & CyCTS)) {
1305 /* cy_stop isn't used
1307 info->port.tty->hw_stopped = 1;
1308 cy_writeb(base_addr + (CySRER << index),
1309 readb(base_addr + (CySRER << index)) &
1314 /* if (mdm_change & CyDSR) {
1316 if (mdm_change & CyRI) {
1319 /* end of service */
1320 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1321 cy_writeb(base_addr + (CyCAR << index), save_car);
1324 /* The real interrupt service routine is called
1325 whenever the card wants its hand held--chars
1326 received, out buffer empty, modem change, etc.
1328 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1331 struct cyclades_card *cinfo = dev_id;
1332 void __iomem *base_addr, *card_base_addr;
1333 unsigned int chip, too_many, had_work;
1336 if (unlikely(cinfo == NULL)) {
1337 #ifdef CY_DEBUG_INTERRUPTS
1338 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1341 return IRQ_NONE; /* spurious interrupt */
1344 card_base_addr = cinfo->base_addr;
1345 index = cinfo->bus_index;
1347 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1348 if (unlikely(card_base_addr == NULL))
1351 /* This loop checks all chips in the card. Make a note whenever
1352 _any_ chip had some work to do, as this is considered an
1353 indication that there will be more to do. Only when no chip
1354 has any work does this outermost loop exit.
1358 for (chip = 0; chip < cinfo->num_chips; chip++) {
1359 base_addr = cinfo->base_addr +
1360 (cy_chip_offset[chip] << index);
1362 while ((status = readb(base_addr +
1363 (CySVRR << index))) != 0x00) {
1365 /* The purpose of the following test is to ensure that
1366 no chip can monopolize the driver. This forces the
1367 chips to be checked in a round-robin fashion (after
1368 draining each of a bunch (1000) of characters).
1370 if (1000 < too_many++)
1372 spin_lock(&cinfo->card_lock);
1373 if (status & CySRReceive) /* rx intr */
1374 cyy_chip_rx(cinfo, chip, base_addr);
1375 if (status & CySRTransmit) /* tx intr */
1376 cyy_chip_tx(cinfo, chip, base_addr);
1377 if (status & CySRModem) /* modem intr */
1378 cyy_chip_modem(cinfo, chip, base_addr);
1379 spin_unlock(&cinfo->card_lock);
1384 /* clear interrupts */
1385 spin_lock(&cinfo->card_lock);
1386 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1387 /* Cy_ClrIntr is 0x1800 */
1388 spin_unlock(&cinfo->card_lock);
1390 } /* cyy_interrupt */
1392 /***********************************************************/
1393 /********* End of block of Cyclom-Y specific code **********/
1394 /******** Start of block of Cyclades-Z specific code *******/
1395 /***********************************************************/
1398 cyz_fetch_msg(struct cyclades_card *cinfo,
1399 __u32 *channel, __u8 *cmd, __u32 *param)
1401 struct FIRM_ID __iomem *firm_id;
1402 struct ZFW_CTRL __iomem *zfw_ctrl;
1403 struct BOARD_CTRL __iomem *board_ctrl;
1404 unsigned long loc_doorbell;
1406 firm_id = cinfo->base_addr + ID_ADDRESS;
1407 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1408 board_ctrl = &zfw_ctrl->board_ctrl;
1410 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
1412 *cmd = (char)(0xff & loc_doorbell);
1413 *channel = readl(&board_ctrl->fwcmd_channel);
1414 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1415 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
1419 } /* cyz_fetch_msg */
1422 cyz_issue_cmd(struct cyclades_card *cinfo,
1423 __u32 channel, __u8 cmd, __u32 param)
1425 struct FIRM_ID __iomem *firm_id;
1426 struct ZFW_CTRL __iomem *zfw_ctrl;
1427 struct BOARD_CTRL __iomem *board_ctrl;
1428 __u32 __iomem *pci_doorbell;
1431 firm_id = cinfo->base_addr + ID_ADDRESS;
1432 if (!cyz_is_loaded(cinfo))
1435 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1436 board_ctrl = &zfw_ctrl->board_ctrl;
1439 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
1440 while ((readl(pci_doorbell) & 0xff) != 0) {
1441 if (index++ == 1000)
1442 return (int)(readl(pci_doorbell) & 0xff);
1445 cy_writel(&board_ctrl->hcmd_channel, channel);
1446 cy_writel(&board_ctrl->hcmd_param, param);
1447 cy_writel(pci_doorbell, (long)cmd);
1450 } /* cyz_issue_cmd */
1452 static void cyz_handle_rx(struct cyclades_port *info,
1453 struct BUF_CTRL __iomem *buf_ctrl)
1455 struct cyclades_card *cinfo = info->card;
1456 struct tty_struct *tty = info->port.tty;
1457 unsigned int char_count;
1464 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1466 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1467 rx_put = readl(&buf_ctrl->rx_put);
1468 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1469 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1470 if (rx_put >= rx_get)
1471 char_count = rx_put - rx_get;
1473 char_count = rx_put - rx_get + rx_bufsize;
1476 #ifdef CY_ENABLE_MONITORING
1477 info->mon.int_count++;
1478 info->mon.char_count += char_count;
1479 if (char_count > info->mon.char_max)
1480 info->mon.char_max = char_count;
1481 info->mon.char_last = char_count;
1484 /* flush received characters */
1485 new_rx_get = (new_rx_get + char_count) &
1487 info->rflush_count++;
1490 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1491 for performance, but because of buffer boundaries, there
1492 may be several steps to the operation */
1494 len = tty_prepare_flip_string(tty, &buf,
1499 len = min_t(unsigned int, min(len, char_count),
1500 rx_bufsize - new_rx_get);
1502 memcpy_fromio(buf, cinfo->base_addr +
1503 rx_bufaddr + new_rx_get, len);
1505 new_rx_get = (new_rx_get + len) &
1508 info->icount.rx += len;
1509 info->idle_stats.recv_bytes += len;
1512 len = tty_buffer_request_room(tty, char_count);
1514 data = readb(cinfo->base_addr + rx_bufaddr +
1516 new_rx_get = (new_rx_get + 1) &
1518 tty_insert_flip_char(tty, data, TTY_NORMAL);
1519 info->idle_stats.recv_bytes++;
1523 #ifdef CONFIG_CYZ_INTR
1524 /* Recalculate the number of chars in the RX buffer and issue
1525 a cmd in case it's higher than the RX high water mark */
1526 rx_put = readl(&buf_ctrl->rx_put);
1527 if (rx_put >= rx_get)
1528 char_count = rx_put - rx_get;
1530 char_count = rx_put - rx_get + rx_bufsize;
1531 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1532 !timer_pending(&cyz_rx_full_timer[
1534 mod_timer(&cyz_rx_full_timer[info->line],
1537 info->idle_stats.recv_idle = jiffies;
1538 tty_schedule_flip(tty);
1541 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1545 static void cyz_handle_tx(struct cyclades_port *info,
1546 struct BUF_CTRL __iomem *buf_ctrl)
1548 struct cyclades_card *cinfo = info->card;
1549 struct tty_struct *tty = info->port.tty;
1551 unsigned int char_count;
1555 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1557 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1560 tx_get = readl(&buf_ctrl->tx_get);
1561 tx_put = readl(&buf_ctrl->tx_put);
1562 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1563 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1564 if (tx_put >= tx_get)
1565 char_count = tx_get - tx_put - 1 + tx_bufsize;
1567 char_count = tx_get - tx_put - 1;
1574 if (info->x_char) { /* send special char */
1575 data = info->x_char;
1577 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1578 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1584 while (0 < (small_count = min_t(unsigned int,
1585 tx_bufsize - tx_put, min_t(unsigned int,
1586 (SERIAL_XMIT_SIZE - info->xmit_tail),
1587 min_t(unsigned int, info->xmit_cnt,
1590 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1592 &info->port.xmit_buf[info->xmit_tail],
1595 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1596 char_count -= small_count;
1597 info->icount.tx += small_count;
1598 info->xmit_cnt -= small_count;
1599 info->xmit_tail = (info->xmit_tail + small_count) &
1600 (SERIAL_XMIT_SIZE - 1);
1603 while (info->xmit_cnt && char_count) {
1604 data = info->port.xmit_buf[info->xmit_tail];
1606 info->xmit_tail = (info->xmit_tail + 1) &
1607 (SERIAL_XMIT_SIZE - 1);
1609 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1610 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1618 cy_writel(&buf_ctrl->tx_put, tx_put);
1622 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1624 struct tty_struct *tty;
1625 struct cyclades_port *info;
1626 static struct FIRM_ID __iomem *firm_id;
1627 static struct ZFW_CTRL __iomem *zfw_ctrl;
1628 static struct BOARD_CTRL __iomem *board_ctrl;
1629 static struct CH_CTRL __iomem *ch_ctrl;
1630 static struct BUF_CTRL __iomem *buf_ctrl;
1631 __u32 channel, param, fw_ver;
1636 firm_id = cinfo->base_addr + ID_ADDRESS;
1637 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1638 board_ctrl = &zfw_ctrl->board_ctrl;
1639 fw_ver = readl(&board_ctrl->fw_version);
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1644 info = &cinfo->ports[channel];
1645 tty = info->port.tty;
1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1671 if (info->port.flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
1673 readl(&ch_ctrl->rs_status)) &
1675 wake_up_interruptible(&info->port.open_wait);
1677 tty_hangup(info->port.tty);
1678 wake_up_interruptible(&info->port.open_wait);
1679 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1697 complete(&info->shutdown_wait);
1700 #ifdef CONFIG_CYZ_INTR
1704 /* Reception Interrupt */
1705 #ifdef CY_DEBUG_INTERRUPTS
1706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
1709 cyz_handle_rx(info, buf_ctrl);
1714 /* Transmission Interrupt */
1715 #ifdef CY_DEBUG_INTERRUPTS
1716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
1719 cyz_handle_tx(info, buf_ctrl);
1721 #endif /* CONFIG_CYZ_INTR */
1723 /* should do something with this !!! */
1729 wake_up_interruptible(&info->delta_msr_wait);
1731 tty_schedule_flip(tty);
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1738 struct cyclades_card *cinfo = dev_id;
1740 if (unlikely(!cyz_is_loaded(cinfo))) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1748 /* Handle the interrupts */
1749 cyz_handle_cmd(cinfo);
1752 } /* cyz_interrupt */
1754 static void cyz_rx_restart(unsigned long arg)
1756 struct cyclades_port *info = (struct cyclades_port *)arg;
1757 struct cyclades_card *card = info->card;
1759 __u32 channel = info->line - card->first_line;
1760 unsigned long flags;
1762 spin_lock_irqsave(&card->card_lock, flags);
1763 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1765 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1766 info->line, retval);
1768 spin_unlock_irqrestore(&card->card_lock, flags);
1771 #else /* CONFIG_CYZ_INTR */
1773 static void cyz_poll(unsigned long arg)
1775 struct cyclades_card *cinfo;
1776 struct cyclades_port *info;
1777 struct tty_struct *tty;
1778 struct FIRM_ID __iomem *firm_id;
1779 struct ZFW_CTRL __iomem *zfw_ctrl;
1780 struct BUF_CTRL __iomem *buf_ctrl;
1781 unsigned long expires = jiffies + HZ;
1782 unsigned int port, card;
1784 for (card = 0; card < NR_CARDS; card++) {
1785 cinfo = &cy_card[card];
1787 if (!cy_is_Z(cinfo))
1789 if (!cyz_is_loaded(cinfo))
1792 firm_id = cinfo->base_addr + ID_ADDRESS;
1793 zfw_ctrl = cinfo->base_addr +
1794 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1796 /* Skip first polling cycle to avoid racing conditions with the FW */
1797 if (!cinfo->intr_enabled) {
1798 cinfo->intr_enabled = 1;
1802 cyz_handle_cmd(cinfo);
1804 for (port = 0; port < cinfo->nports; port++) {
1805 info = &cinfo->ports[port];
1806 tty = info->port.tty;
1807 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1809 if (!info->throttle)
1810 cyz_handle_rx(info, buf_ctrl);
1811 cyz_handle_tx(info, buf_ctrl);
1813 /* poll every 'cyz_polling_cycle' period */
1814 expires = jiffies + cyz_polling_cycle;
1816 mod_timer(&cyz_timerlist, expires);
1819 #endif /* CONFIG_CYZ_INTR */
1821 /********** End of block of Cyclades-Z specific code *********/
1822 /***********************************************************/
1824 /* This is called whenever a port becomes active;
1825 interrupts are enabled and DTR & RTS are turned on.
1827 static int startup(struct cyclades_port *info)
1829 struct cyclades_card *card;
1830 unsigned long flags;
1832 void __iomem *base_addr;
1833 int chip, channel, index;
1837 channel = info->line - card->first_line;
1839 page = get_zeroed_page(GFP_KERNEL);
1843 spin_lock_irqsave(&card->card_lock, flags);
1845 if (info->port.flags & ASYNC_INITIALIZED) {
1852 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1857 if (info->port.xmit_buf)
1860 info->port.xmit_buf = (unsigned char *)page;
1862 spin_unlock_irqrestore(&card->card_lock, flags);
1864 set_line_char(info);
1866 if (!cy_is_Z(card)) {
1867 chip = channel >> 2;
1869 index = card->bus_index;
1870 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1872 #ifdef CY_DEBUG_OPEN
1873 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1875 card, chip, channel, base_addr);
1877 spin_lock_irqsave(&card->card_lock, flags);
1879 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1881 cy_writeb(base_addr + (CyRTPR << index),
1882 (info->default_timeout ? info->default_timeout : 0x02));
1883 /* 10ms rx timeout */
1885 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1888 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1889 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1890 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1893 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1894 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
1895 readb(base_addr + (CyMSVR1 << index)),
1896 readb(base_addr + (CyMSVR2 << index)));
1899 cy_writeb(base_addr + (CySRER << index),
1900 readb(base_addr + (CySRER << index)) | CyRxData);
1901 info->port.flags |= ASYNC_INITIALIZED;
1904 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1905 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1906 info->breakon = info->breakoff = 0;
1907 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1908 info->idle_stats.in_use =
1909 info->idle_stats.recv_idle =
1910 info->idle_stats.xmit_idle = jiffies;
1912 spin_unlock_irqrestore(&card->card_lock, flags);
1915 struct FIRM_ID __iomem *firm_id;
1916 struct ZFW_CTRL __iomem *zfw_ctrl;
1917 struct BOARD_CTRL __iomem *board_ctrl;
1918 struct CH_CTRL __iomem *ch_ctrl;
1920 base_addr = card->base_addr;
1922 firm_id = base_addr + ID_ADDRESS;
1923 if (!cyz_is_loaded(card))
1926 zfw_ctrl = card->base_addr +
1927 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1928 board_ctrl = &zfw_ctrl->board_ctrl;
1929 ch_ctrl = zfw_ctrl->ch_ctrl;
1931 #ifdef CY_DEBUG_OPEN
1932 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1933 "base_addr %p\n", card, channel, base_addr);
1935 spin_lock_irqsave(&card->card_lock, flags);
1937 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1939 #ifdef CONFIG_CYZ_INTR
1940 cy_writel(&ch_ctrl[channel].intr_enable,
1941 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1942 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1944 cy_writel(&ch_ctrl[channel].intr_enable,
1945 C_IN_IOCTLW | C_IN_MDCD);
1946 #endif /* CONFIG_CYZ_INTR */
1948 #ifdef CONFIG_CYZ_INTR
1949 cy_writel(&ch_ctrl[channel].intr_enable,
1950 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1951 C_IN_RXNNDT | C_IN_MDCD);
1953 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1954 #endif /* CONFIG_CYZ_INTR */
1957 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1959 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1960 "%x\n", info->line, retval);
1963 /* Flush RX buffers before raising DTR and RTS */
1964 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1966 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1967 "%x\n", info->line, retval);
1970 /* set timeout !!! */
1971 /* set RTS and DTR !!! */
1972 cy_writel(&ch_ctrl[channel].rs_control,
1973 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1975 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1977 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1978 "%x\n", info->line, retval);
1981 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1984 /* enable send, recv, modem !!! */
1986 info->port.flags |= ASYNC_INITIALIZED;
1988 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1989 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1990 info->breakon = info->breakoff = 0;
1991 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1992 info->idle_stats.in_use =
1993 info->idle_stats.recv_idle =
1994 info->idle_stats.xmit_idle = jiffies;
1996 spin_unlock_irqrestore(&card->card_lock, flags);
1999 #ifdef CY_DEBUG_OPEN
2000 printk(KERN_DEBUG "cyc startup done\n");
2005 spin_unlock_irqrestore(&card->card_lock, flags);
2009 static void start_xmit(struct cyclades_port *info)
2011 struct cyclades_card *card;
2012 unsigned long flags;
2013 void __iomem *base_addr;
2014 int chip, channel, index;
2017 channel = info->line - card->first_line;
2018 if (!cy_is_Z(card)) {
2019 chip = channel >> 2;
2021 index = card->bus_index;
2022 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2024 spin_lock_irqsave(&card->card_lock, flags);
2025 cy_writeb(base_addr + (CyCAR << index), channel);
2026 cy_writeb(base_addr + (CySRER << index),
2027 readb(base_addr + (CySRER << index)) | CyTxRdy);
2028 spin_unlock_irqrestore(&card->card_lock, flags);
2030 #ifdef CONFIG_CYZ_INTR
2033 spin_lock_irqsave(&card->card_lock, flags);
2034 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2036 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2037 "%x\n", info->line, retval);
2039 spin_unlock_irqrestore(&card->card_lock, flags);
2040 #else /* CONFIG_CYZ_INTR */
2041 /* Don't have to do anything at this time */
2042 #endif /* CONFIG_CYZ_INTR */
2047 * This routine shuts down a serial port; interrupts are disabled,
2048 * and DTR is dropped if the hangup on close termio flag is on.
2050 static void shutdown(struct cyclades_port *info)
2052 struct cyclades_card *card;
2053 unsigned long flags;
2054 void __iomem *base_addr;
2055 int chip, channel, index;
2057 if (!(info->port.flags & ASYNC_INITIALIZED))
2061 channel = info->line - card->first_line;
2062 if (!cy_is_Z(card)) {
2063 chip = channel >> 2;
2065 index = card->bus_index;
2066 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2068 #ifdef CY_DEBUG_OPEN
2069 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2070 "channel %d, base_addr %p\n",
2071 card, chip, channel, base_addr);
2074 spin_lock_irqsave(&card->card_lock, flags);
2076 /* Clear delta_msr_wait queue to avoid mem leaks. */
2077 wake_up_interruptible(&info->delta_msr_wait);
2079 if (info->port.xmit_buf) {
2080 unsigned char *temp;
2081 temp = info->port.xmit_buf;
2082 info->port.xmit_buf = NULL;
2083 free_page((unsigned long)temp);
2085 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2086 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2087 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2088 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2090 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2091 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2092 readb(base_addr + (CyMSVR1 << index)),
2093 readb(base_addr + (CyMSVR2 << index)));
2096 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2097 /* it may be appropriate to clear _XMIT at
2098 some later date (after testing)!!! */
2101 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2102 info->port.flags &= ~ASYNC_INITIALIZED;
2103 spin_unlock_irqrestore(&card->card_lock, flags);
2105 struct FIRM_ID __iomem *firm_id;
2106 struct ZFW_CTRL __iomem *zfw_ctrl;
2107 struct BOARD_CTRL __iomem *board_ctrl;
2108 struct CH_CTRL __iomem *ch_ctrl;
2111 base_addr = card->base_addr;
2112 #ifdef CY_DEBUG_OPEN
2113 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2114 "base_addr %p\n", card, channel, base_addr);
2117 firm_id = base_addr + ID_ADDRESS;
2118 if (!cyz_is_loaded(card))
2121 zfw_ctrl = card->base_addr +
2122 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2123 board_ctrl = &zfw_ctrl->board_ctrl;
2124 ch_ctrl = zfw_ctrl->ch_ctrl;
2126 spin_lock_irqsave(&card->card_lock, flags);
2128 if (info->port.xmit_buf) {
2129 unsigned char *temp;
2130 temp = info->port.xmit_buf;
2131 info->port.xmit_buf = NULL;
2132 free_page((unsigned long)temp);
2135 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2136 cy_writel(&ch_ctrl[channel].rs_control,
2137 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2138 ~(C_RS_RTS | C_RS_DTR)));
2139 retval = cyz_issue_cmd(info->card, channel,
2142 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2143 "was %x\n", info->line, retval);
2146 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2151 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2152 info->port.flags &= ~ASYNC_INITIALIZED;
2154 spin_unlock_irqrestore(&card->card_lock, flags);
2157 #ifdef CY_DEBUG_OPEN
2158 printk(KERN_DEBUG "cyc shutdown done\n");
2163 * ------------------------------------------------------------
2164 * cy_open() and friends
2165 * ------------------------------------------------------------
2169 block_til_ready(struct tty_struct *tty, struct file *filp,
2170 struct cyclades_port *info)
2172 DECLARE_WAITQUEUE(wait, current);
2173 struct cyclades_card *cinfo;
2174 unsigned long flags;
2175 int chip, channel, index;
2177 void __iomem *base_addr;
2180 channel = info->line - cinfo->first_line;
2183 * If the device is in the middle of being closed, then block
2184 * until it's done, and then try again.
2186 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2187 wait_event_interruptible(info->port.close_wait,
2188 !(info->port.flags & ASYNC_CLOSING));
2189 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2193 * If non-blocking mode is set, then make the check up front
2196 if ((filp->f_flags & O_NONBLOCK) ||
2197 (tty->flags & (1 << TTY_IO_ERROR))) {
2198 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2203 * Block waiting for the carrier detect and the line to become
2204 * free (i.e., not in use by the callout). While we are in
2205 * this loop, info->port.count is dropped by one, so that
2206 * cy_close() knows when to free things. We restore it upon
2207 * exit, either normal or abnormal.
2210 add_wait_queue(&info->port.open_wait, &wait);
2211 #ifdef CY_DEBUG_OPEN
2212 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2213 "count = %d\n", info->line, info->port.count);
2215 spin_lock_irqsave(&cinfo->card_lock, flags);
2216 if (!tty_hung_up_p(filp))
2218 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2219 #ifdef CY_DEBUG_COUNT
2220 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2221 "%d\n", current->pid, info->port.count);
2223 info->port.blocked_open++;
2225 if (!cy_is_Z(cinfo)) {
2226 chip = channel >> 2;
2228 index = cinfo->bus_index;
2229 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2232 spin_lock_irqsave(&cinfo->card_lock, flags);
2233 if ((tty->termios->c_cflag & CBAUD)) {
2234 cy_writeb(base_addr + (CyCAR << index),
2236 cy_writeb(base_addr + (CyMSVR1 << index),
2238 cy_writeb(base_addr + (CyMSVR2 << index),
2241 printk(KERN_DEBUG "cyc:block_til_ready raising "
2243 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2244 readb(base_addr + (CyMSVR1 << index)),
2245 readb(base_addr + (CyMSVR2 << index)));
2248 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2250 set_current_state(TASK_INTERRUPTIBLE);
2251 if (tty_hung_up_p(filp) ||
2252 !(info->port.flags & ASYNC_INITIALIZED)) {
2253 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2254 -EAGAIN : -ERESTARTSYS);
2258 spin_lock_irqsave(&cinfo->card_lock, flags);
2259 cy_writeb(base_addr + (CyCAR << index),
2261 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2263 (CyMSVR1 << index)) & CyDCD))) {
2264 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2267 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2269 if (signal_pending(current)) {
2270 retval = -ERESTARTSYS;
2273 #ifdef CY_DEBUG_OPEN
2274 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2275 "ttyC%d, count = %d\n",
2276 info->line, info->port.count);
2281 struct FIRM_ID __iomem *firm_id;
2282 struct ZFW_CTRL __iomem *zfw_ctrl;
2283 struct BOARD_CTRL __iomem *board_ctrl;
2284 struct CH_CTRL __iomem *ch_ctrl;
2286 base_addr = cinfo->base_addr;
2287 firm_id = base_addr + ID_ADDRESS;
2288 if (!cyz_is_loaded(cinfo)) {
2289 __set_current_state(TASK_RUNNING);
2290 remove_wait_queue(&info->port.open_wait, &wait);
2294 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2296 board_ctrl = &zfw_ctrl->board_ctrl;
2297 ch_ctrl = zfw_ctrl->ch_ctrl;
2300 if ((tty->termios->c_cflag & CBAUD)) {
2301 cy_writel(&ch_ctrl[channel].rs_control,
2302 readl(&ch_ctrl[channel].rs_control) |
2303 C_RS_RTS | C_RS_DTR);
2304 retval = cyz_issue_cmd(cinfo,
2305 channel, C_CM_IOCTLM, 0L);
2307 printk(KERN_ERR "cyc:block_til_ready "
2308 "retval on ttyC%d was %x\n",
2309 info->line, retval);
2312 printk(KERN_DEBUG "cyc:block_til_ready raising "
2317 set_current_state(TASK_INTERRUPTIBLE);
2318 if (tty_hung_up_p(filp) ||
2319 !(info->port.flags & ASYNC_INITIALIZED)) {
2320 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2321 -EAGAIN : -ERESTARTSYS);
2324 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2325 (readl(&ch_ctrl[channel].rs_status) &
2329 if (signal_pending(current)) {
2330 retval = -ERESTARTSYS;
2333 #ifdef CY_DEBUG_OPEN
2334 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2335 "ttyC%d, count = %d\n",
2336 info->line, info->port.count);
2341 __set_current_state(TASK_RUNNING);
2342 remove_wait_queue(&info->port.open_wait, &wait);
2343 if (!tty_hung_up_p(filp)) {
2345 #ifdef CY_DEBUG_COUNT
2346 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2347 "count to %d\n", current->pid, info->port.count);
2350 info->port.blocked_open--;
2351 #ifdef CY_DEBUG_OPEN
2352 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2353 "count = %d\n", info->line, info->port.count);
2357 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2359 } /* block_til_ready */
2362 * This routine is called whenever a serial port is opened. It
2363 * performs the serial-specific initialization for the tty structure.
2365 static int cy_open(struct tty_struct *tty, struct file *filp)
2367 struct cyclades_port *info;
2368 unsigned int i, line;
2372 if (tty->index < 0 || NR_PORTS <= line)
2375 for (i = 0; i < NR_CARDS; i++)
2376 if (line < cy_card[i].first_line + cy_card[i].nports &&
2377 line >= cy_card[i].first_line)
2381 info = &cy_card[i].ports[line - cy_card[i].first_line];
2385 /* If the card's firmware hasn't been loaded,
2386 treat it as absent from the system. This
2387 will make the user pay attention.
2389 if (cy_is_Z(info->card)) {
2390 struct cyclades_card *cinfo = info->card;
2391 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2393 if (!cyz_is_loaded(cinfo)) {
2394 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
2395 readl(&firm_id->signature) ==
2397 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2398 "need an external power supply for "
2399 "this number of ports.\nFirmware "
2402 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2407 #ifdef CONFIG_CYZ_INTR
2409 /* In case this Z board is operating in interrupt mode, its
2410 interrupts should be enabled as soon as the first open
2411 happens to one of its ports. */
2412 if (!cinfo->intr_enabled) {
2415 /* Enable interrupts on the PLX chip */
2416 intr = readw(&cinfo->ctl_addr.p9060->
2417 intr_ctrl_stat) | 0x0900;
2418 cy_writew(&cinfo->ctl_addr.p9060->
2419 intr_ctrl_stat, intr);
2420 /* Enable interrupts on the FW */
2421 retval = cyz_issue_cmd(cinfo, 0,
2424 printk(KERN_ERR "cyc:IRQ enable retval "
2425 "was %x\n", retval);
2427 cinfo->intr_enabled = 1;
2430 #endif /* CONFIG_CYZ_INTR */
2431 /* Make sure this Z port really exists in hardware */
2432 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2435 #ifdef CY_DEBUG_OTHER
2436 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2438 tty->driver_data = info;
2439 info->port.tty = tty;
2440 if (serial_paranoia_check(info, tty->name, "cy_open"))
2443 #ifdef CY_DEBUG_OPEN
2444 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2448 #ifdef CY_DEBUG_COUNT
2449 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2450 current->pid, info->port.count);
2454 * If the port is the middle of closing, bail out now
2456 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2457 wait_event_interruptible(info->port.close_wait,
2458 !(info->port.flags & ASYNC_CLOSING));
2459 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2463 * Start up serial port
2465 retval = startup(info);
2469 retval = block_til_ready(tty, filp, info);
2471 #ifdef CY_DEBUG_OPEN
2472 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2473 "with %d\n", retval);
2480 #ifdef CY_DEBUG_OPEN
2481 printk(KERN_DEBUG "cyc:cy_open done\n");
2487 * cy_wait_until_sent() --- wait until the transmitter is empty
2489 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2491 struct cyclades_card *card;
2492 struct cyclades_port *info = tty->driver_data;
2493 void __iomem *base_addr;
2494 int chip, channel, index;
2495 unsigned long orig_jiffies;
2498 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2501 if (info->xmit_fifo_size == 0)
2502 return; /* Just in case.... */
2504 orig_jiffies = jiffies;
2507 * Set the check interval to be 1/5 of the estimated time to
2508 * send a single character, and make it at least 1. The check
2509 * interval should also be less than the timeout.
2511 * Note: we have to use pretty tight timings here to satisfy
2514 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2515 char_time = char_time / 5;
2521 char_time = min(char_time, timeout);
2523 * If the transmitter hasn't cleared in twice the approximate
2524 * amount of time to send the entire FIFO, it probably won't
2525 * ever clear. This assumes the UART isn't doing flow
2526 * control, which is currently the case. Hence, if it ever
2527 * takes longer than info->timeout, this is probably due to a
2528 * UART bug of some kind. So, we clamp the timeout parameter at
2531 if (!timeout || timeout > 2 * info->timeout)
2532 timeout = 2 * info->timeout;
2533 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2534 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2535 timeout, char_time, jiffies);
2538 channel = (info->line) - (card->first_line);
2539 if (!cy_is_Z(card)) {
2540 chip = channel >> 2;
2542 index = card->bus_index;
2543 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2544 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2545 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2546 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2548 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2550 if (timeout && time_after(jiffies, orig_jiffies +
2555 /* Run one more char cycle */
2556 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2558 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2559 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2563 static void cy_flush_buffer(struct tty_struct *tty)
2565 struct cyclades_port *info = tty->driver_data;
2566 struct cyclades_card *card;
2567 int channel, retval;
2568 unsigned long flags;
2571 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2574 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2578 channel = info->line - card->first_line;
2580 spin_lock_irqsave(&card->card_lock, flags);
2581 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2582 spin_unlock_irqrestore(&card->card_lock, flags);
2584 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
2586 spin_lock_irqsave(&card->card_lock, flags);
2587 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2589 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2590 "was %x\n", info->line, retval);
2592 spin_unlock_irqrestore(&card->card_lock, flags);
2595 } /* cy_flush_buffer */
2599 * This routine is called when a particular tty device is closed.
2601 static void cy_close(struct tty_struct *tty, struct file *filp)
2603 struct cyclades_port *info = tty->driver_data;
2604 struct cyclades_card *card;
2605 unsigned long flags;
2607 #ifdef CY_DEBUG_OTHER
2608 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2611 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2616 spin_lock_irqsave(&card->card_lock, flags);
2617 /* If the TTY is being hung up, nothing to do */
2618 if (tty_hung_up_p(filp)) {
2619 spin_unlock_irqrestore(&card->card_lock, flags);
2622 #ifdef CY_DEBUG_OPEN
2623 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2626 if ((tty->count == 1) && (info->port.count != 1)) {
2628 * Uh, oh. tty->count is 1, which means that the tty
2629 * structure will be freed. Info->count should always
2630 * be one in these conditions. If it's greater than
2631 * one, we've got real problems, since it means the
2632 * serial port won't be shutdown.
2634 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2635 "tty->count is 1, info->port.count is %d\n", info->port.count);
2636 info->port.count = 1;
2638 #ifdef CY_DEBUG_COUNT
2639 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
2640 current->pid, info->port.count - 1);
2642 if (--info->port.count < 0) {
2643 #ifdef CY_DEBUG_COUNT
2644 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2646 info->port.count = 0;
2648 if (info->port.count) {
2649 spin_unlock_irqrestore(&card->card_lock, flags);
2652 info->port.flags |= ASYNC_CLOSING;
2655 * Now we wait for the transmit buffer to clear; and we notify
2656 * the line discipline to only process XON/XOFF characters.
2659 spin_unlock_irqrestore(&card->card_lock, flags);
2660 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2661 tty_wait_until_sent(tty, info->port.closing_wait);
2663 spin_lock_irqsave(&card->card_lock, flags);
2665 if (!cy_is_Z(card)) {
2666 int channel = info->line - card->first_line;
2667 int index = card->bus_index;
2668 void __iomem *base_addr = card->base_addr +
2669 (cy_chip_offset[channel >> 2] << index);
2670 /* Stop accepting input */
2672 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2673 cy_writeb(base_addr + (CySRER << index),
2674 readb(base_addr + (CySRER << index)) & ~CyRxData);
2675 if (info->port.flags & ASYNC_INITIALIZED) {
2676 /* Waiting for on-board buffers to be empty before
2678 spin_unlock_irqrestore(&card->card_lock, flags);
2679 cy_wait_until_sent(tty, info->timeout);
2680 spin_lock_irqsave(&card->card_lock, flags);
2684 /* Waiting for on-board buffers to be empty before closing
2686 void __iomem *base_addr = card->base_addr;
2687 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2688 struct ZFW_CTRL __iomem *zfw_ctrl =
2689 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2690 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2691 int channel = info->line - card->first_line;
2694 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2695 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2697 printk(KERN_DEBUG "cyc:cy_close retval on "
2698 "ttyC%d was %x\n", info->line, retval);
2700 spin_unlock_irqrestore(&card->card_lock, flags);
2701 wait_for_completion_interruptible(&info->shutdown_wait);
2702 spin_lock_irqsave(&card->card_lock, flags);
2707 spin_unlock_irqrestore(&card->card_lock, flags);
2709 cy_flush_buffer(tty);
2710 tty_ldisc_flush(tty);
2711 spin_lock_irqsave(&card->card_lock, flags);
2714 info->port.tty = NULL;
2715 if (info->port.blocked_open) {
2716 spin_unlock_irqrestore(&card->card_lock, flags);
2717 if (info->port.close_delay) {
2718 msleep_interruptible(jiffies_to_msecs
2719 (info->port.close_delay));
2721 wake_up_interruptible(&info->port.open_wait);
2722 spin_lock_irqsave(&card->card_lock, flags);
2724 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2725 wake_up_interruptible(&info->port.close_wait);
2727 #ifdef CY_DEBUG_OTHER
2728 printk(KERN_DEBUG "cyc:cy_close done\n");
2731 spin_unlock_irqrestore(&card->card_lock, flags);
2734 /* This routine gets called when tty_write has put something into
2735 * the write_queue. The characters may come from user space or
2738 * This routine will return the number of characters actually
2739 * accepted for writing.
2741 * If the port is not already transmitting stuff, start it off by
2742 * enabling interrupts. The interrupt service routine will then
2743 * ensure that the characters are sent.
2744 * If the port is already active, there is no need to kick it.
2747 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2749 struct cyclades_port *info = tty->driver_data;
2750 unsigned long flags;
2754 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2757 if (serial_paranoia_check(info, tty->name, "cy_write"))
2760 if (!info->port.xmit_buf)
2763 spin_lock_irqsave(&info->card->card_lock, flags);
2765 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2766 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2771 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2772 info->xmit_head = (info->xmit_head + c) &
2773 (SERIAL_XMIT_SIZE - 1);
2774 info->xmit_cnt += c;
2779 spin_unlock_irqrestore(&info->card->card_lock, flags);
2781 info->idle_stats.xmit_bytes += ret;
2782 info->idle_stats.xmit_idle = jiffies;
2784 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2791 * This routine is called by the kernel to write a single
2792 * character to the tty device. If the kernel uses this routine,
2793 * it must call the flush_chars() routine (if defined) when it is
2794 * done stuffing characters into the driver. If there is no room
2795 * in the queue, the character is ignored.
2797 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2799 struct cyclades_port *info = tty->driver_data;
2800 unsigned long flags;
2803 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2806 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2809 if (!info->port.xmit_buf)
2812 spin_lock_irqsave(&info->card->card_lock, flags);
2813 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2814 spin_unlock_irqrestore(&info->card->card_lock, flags);
2818 info->port.xmit_buf[info->xmit_head++] = ch;
2819 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2821 info->idle_stats.xmit_bytes++;
2822 info->idle_stats.xmit_idle = jiffies;
2823 spin_unlock_irqrestore(&info->card->card_lock, flags);
2828 * This routine is called by the kernel after it has written a
2829 * series of characters to the tty device using put_char().
2831 static void cy_flush_chars(struct tty_struct *tty)
2833 struct cyclades_port *info = tty->driver_data;
2836 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2839 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2842 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2843 !info->port.xmit_buf)
2847 } /* cy_flush_chars */
2850 * This routine returns the numbers of characters the tty driver
2851 * will accept for queuing to be written. This number is subject
2852 * to change as output buffers get emptied, or if the output flow
2853 * control is activated.
2855 static int cy_write_room(struct tty_struct *tty)
2857 struct cyclades_port *info = tty->driver_data;
2861 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2864 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2866 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2870 } /* cy_write_room */
2872 static int cy_chars_in_buffer(struct tty_struct *tty)
2874 struct cyclades_card *card;
2875 struct cyclades_port *info = tty->driver_data;
2878 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2882 channel = (info->line) - (card->first_line);
2884 #ifdef Z_EXT_CHARS_IN_BUFFER
2885 if (!cy_is_Z(card)) {
2886 #endif /* Z_EXT_CHARS_IN_BUFFER */
2888 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2889 info->line, info->xmit_cnt);
2891 return info->xmit_cnt;
2892 #ifdef Z_EXT_CHARS_IN_BUFFER
2894 static struct FIRM_ID *firm_id;
2895 static struct ZFW_CTRL *zfw_ctrl;
2896 static struct CH_CTRL *ch_ctrl;
2897 static struct BUF_CTRL *buf_ctrl;
2899 __u32 tx_put, tx_get, tx_bufsize;
2902 firm_id = card->base_addr + ID_ADDRESS;
2903 zfw_ctrl = card->base_addr +
2904 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2905 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2906 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2908 tx_get = readl(&buf_ctrl->tx_get);
2909 tx_put = readl(&buf_ctrl->tx_put);
2910 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2911 if (tx_put >= tx_get)
2912 char_count = tx_put - tx_get;
2914 char_count = tx_put - tx_get + tx_bufsize;
2916 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2917 info->line, info->xmit_cnt + char_count);
2920 return info->xmit_cnt + char_count;
2922 #endif /* Z_EXT_CHARS_IN_BUFFER */
2923 } /* cy_chars_in_buffer */
2926 * ------------------------------------------------------------
2927 * cy_ioctl() and friends
2928 * ------------------------------------------------------------
2931 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2933 int co, co_val, bpr;
2934 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2938 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2942 /* determine which prescaler to use */
2943 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2944 if (cy_clock / co_val / baud > 63)
2948 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2952 info->tbpr = info->rbpr = bpr;
2953 info->tco = info->rco = co;
2957 * This routine finds or computes the various line characteristics.
2958 * It used to be called config_setup
2960 static void set_line_char(struct cyclades_port *info)
2962 struct cyclades_card *card;
2963 unsigned long flags;
2964 void __iomem *base_addr;
2965 int chip, channel, index;
2966 unsigned cflag, iflag;
2967 int baud, baud_rate = 0;
2970 if (!info->port.tty || !info->port.tty->termios)
2973 if (info->line == -1)
2976 cflag = info->port.tty->termios->c_cflag;
2977 iflag = info->port.tty->termios->c_iflag;
2980 * Set up the tty->alt_speed kludge
2982 if (info->port.tty) {
2983 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2984 info->port.tty->alt_speed = 57600;
2985 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2986 info->port.tty->alt_speed = 115200;
2987 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2988 info->port.tty->alt_speed = 230400;
2989 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2990 info->port.tty->alt_speed = 460800;
2994 channel = info->line - card->first_line;
2996 if (!cy_is_Z(card)) {
2998 index = card->bus_index;
3001 baud = tty_get_baud_rate(info->port.tty);
3002 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3004 if (info->custom_divisor)
3005 baud_rate = info->baud / info->custom_divisor;
3007 baud_rate = info->baud;
3008 } else if (baud > CD1400_MAX_SPEED) {
3009 baud = CD1400_MAX_SPEED;
3011 /* find the baud index */
3012 for (i = 0; i < 20; i++) {
3013 if (baud == baud_table[i])
3017 i = 19; /* CD1400_MAX_SPEED */
3019 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3021 cyy_baud_calc(info, baud_rate);
3023 if (info->chip_rev >= CD1400_REV_J) {
3024 /* It is a CD1400 rev. J or later */
3025 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3026 info->tco = baud_co_60[i]; /* Tx CO */
3027 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3028 info->rco = baud_co_60[i]; /* Rx CO */
3030 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3031 info->tco = baud_co_25[i]; /* Tx CO */
3032 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3033 info->rco = baud_co_25[i]; /* Rx CO */
3036 if (baud_table[i] == 134) {
3037 /* get it right for 134.5 baud */
3038 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3040 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3042 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3044 } else if (baud_table[i]) {
3045 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3047 /* this needs to be propagated into the card info */
3051 /* By tradition (is it a standard?) a baud rate of zero
3052 implies the line should be/has been closed. A bit
3053 later in this routine such a test is performed. */
3055 /* byte size and parity */
3058 /* receive threshold */
3059 info->cor3 = (info->default_threshold ?
3060 info->default_threshold : baud_cor3[i]);
3062 switch (cflag & CSIZE) {
3064 info->cor1 = Cy_5_BITS;
3067 info->cor1 = Cy_6_BITS;
3070 info->cor1 = Cy_7_BITS;
3073 info->cor1 = Cy_8_BITS;
3077 info->cor1 |= Cy_2_STOP;
3079 if (cflag & PARENB) {
3081 info->cor1 |= CyPARITY_O;
3083 info->cor1 |= CyPARITY_E;
3085 info->cor1 |= CyPARITY_NONE;
3087 /* CTS flow control flag */
3088 if (cflag & CRTSCTS) {
3089 info->port.flags |= ASYNC_CTS_FLOW;
3090 info->cor2 |= CyCtsAE;
3092 info->port.flags &= ~ASYNC_CTS_FLOW;
3093 info->cor2 &= ~CyCtsAE;
3096 info->port.flags &= ~ASYNC_CHECK_CD;
3098 info->port.flags |= ASYNC_CHECK_CD;
3100 /***********************************************
3101 The hardware option, CyRtsAO, presents RTS when
3102 the chip has characters to send. Since most modems
3103 use RTS as reverse (inbound) flow control, this
3104 option is not used. If inbound flow control is
3105 necessary, DTR can be programmed to provide the
3106 appropriate signals for use with a non-standard
3107 cable. Contact Marcio Saito for details.
3108 ***********************************************/
3110 chip = channel >> 2;
3112 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3114 spin_lock_irqsave(&card->card_lock, flags);
3115 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3117 /* tx and rx baud rate */
3119 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3120 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3121 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3122 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3124 /* set line characteristics according configuration */
3126 cy_writeb(base_addr + (CySCHR1 << index),
3127 START_CHAR(info->port.tty));
3128 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3129 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3130 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3131 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3132 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3133 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3135 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3138 /* !!! Is this needed? */
3139 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3140 cy_writeb(base_addr + (CyRTPR << index),
3141 (info->default_timeout ? info->default_timeout : 0x02));
3142 /* 10ms rx timeout */
3144 if (C_CLOCAL(info->port.tty)) {
3145 /* without modem intr */
3146 cy_writeb(base_addr + (CySRER << index),
3147 readb(base_addr + (CySRER << index)) | CyMdmCh);
3148 /* act on 1->0 modem transitions */
3149 if ((cflag & CRTSCTS) && info->rflow) {
3150 cy_writeb(base_addr + (CyMCOR1 << index),
3151 (CyCTS | rflow_thr[i]));
3153 cy_writeb(base_addr + (CyMCOR1 << index),
3156 /* act on 0->1 modem transitions */
3157 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3159 /* without modem intr */
3160 cy_writeb(base_addr + (CySRER << index),
3162 (CySRER << index)) | CyMdmCh);
3163 /* act on 1->0 modem transitions */
3164 if ((cflag & CRTSCTS) && info->rflow) {
3165 cy_writeb(base_addr + (CyMCOR1 << index),
3166 (CyDSR | CyCTS | CyRI | CyDCD |
3169 cy_writeb(base_addr + (CyMCOR1 << index),
3170 CyDSR | CyCTS | CyRI | CyDCD);
3172 /* act on 0->1 modem transitions */
3173 cy_writeb(base_addr + (CyMCOR2 << index),
3174 CyDSR | CyCTS | CyRI | CyDCD);
3177 if (i == 0) { /* baud rate is zero, turn off line */
3178 if (info->rtsdtr_inv) {
3179 cy_writeb(base_addr + (CyMSVR1 << index),
3182 cy_writeb(base_addr + (CyMSVR2 << index),
3186 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3187 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3188 readb(base_addr + (CyMSVR1 << index)),
3189 readb(base_addr + (CyMSVR2 << index)));
3192 if (info->rtsdtr_inv) {
3193 cy_writeb(base_addr + (CyMSVR1 << index),
3196 cy_writeb(base_addr + (CyMSVR2 << index),
3200 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3201 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3202 readb(base_addr + (CyMSVR1 << index)),
3203 readb(base_addr + (CyMSVR2 << index)));
3208 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3209 spin_unlock_irqrestore(&card->card_lock, flags);
3212 struct FIRM_ID __iomem *firm_id;
3213 struct ZFW_CTRL __iomem *zfw_ctrl;
3214 struct CH_CTRL __iomem *ch_ctrl;
3218 firm_id = card->base_addr + ID_ADDRESS;
3219 if (!cyz_is_loaded(card))
3222 zfw_ctrl = card->base_addr +
3223 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3224 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3227 baud = tty_get_baud_rate(info->port.tty);
3228 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3230 if (info->custom_divisor)
3231 baud_rate = info->baud / info->custom_divisor;
3233 baud_rate = info->baud;
3234 } else if (baud > CYZ_MAX_SPEED) {
3235 baud = CYZ_MAX_SPEED;
3237 cy_writel(&ch_ctrl->comm_baud, baud);
3240 /* get it right for 134.5 baud */
3241 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3243 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3245 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3248 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3250 /* this needs to be propagated into the card info */
3255 /* byte size and parity */
3256 switch (cflag & CSIZE) {
3258 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3261 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3264 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3267 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3270 if (cflag & CSTOPB) {
3271 cy_writel(&ch_ctrl->comm_data_l,
3272 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3274 cy_writel(&ch_ctrl->comm_data_l,
3275 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3277 if (cflag & PARENB) {
3279 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3281 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3283 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3285 /* CTS flow control flag */
3286 if (cflag & CRTSCTS) {
3287 cy_writel(&ch_ctrl->hw_flow,
3288 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3290 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3291 ~(C_RS_CTS | C_RS_RTS));
3293 /* As the HW flow control is done in firmware, the driver
3294 doesn't need to care about it */
3295 info->port.flags &= ~ASYNC_CTS_FLOW;
3297 /* XON/XOFF/XANY flow control flags */
3300 sw_flow |= C_FL_OXX;
3302 sw_flow |= C_FL_OIXANY;
3304 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3306 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3308 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3309 "was %x\n", info->line, retval);
3312 /* CD sensitivity */
3314 info->port.flags &= ~ASYNC_CHECK_CD;
3316 info->port.flags |= ASYNC_CHECK_CD;
3318 if (baud == 0) { /* baud rate is zero, turn off line */
3319 cy_writel(&ch_ctrl->rs_control,
3320 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3322 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3325 cy_writel(&ch_ctrl->rs_control,
3326 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3328 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3332 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3334 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3335 "was %x\n", info->line, retval);
3339 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3341 } /* set_line_char */
3344 get_serial_info(struct cyclades_port *info,
3345 struct serial_struct __user *retinfo)
3347 struct serial_struct tmp;
3348 struct cyclades_card *cinfo = info->card;
3352 memset(&tmp, 0, sizeof(tmp));
3353 tmp.type = info->type;
3354 tmp.line = info->line;
3355 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3357 tmp.irq = cinfo->irq;
3358 tmp.flags = info->port.flags;
3359 tmp.close_delay = info->port.close_delay;
3360 tmp.closing_wait = info->port.closing_wait;
3361 tmp.baud_base = info->baud;
3362 tmp.custom_divisor = info->custom_divisor;
3363 tmp.hub6 = 0; /*!!! */
3364 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3365 } /* get_serial_info */
3368 set_serial_info(struct cyclades_port *info,
3369 struct serial_struct __user *new_info)
3371 struct serial_struct new_serial;
3372 struct cyclades_port old_info;
3374 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3378 if (!capable(CAP_SYS_ADMIN)) {
3379 if (new_serial.close_delay != info->port.close_delay ||
3380 new_serial.baud_base != info->baud ||
3381 (new_serial.flags & ASYNC_FLAGS &
3383 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3385 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3386 (new_serial.flags & ASYNC_USR_MASK);
3387 info->baud = new_serial.baud_base;
3388 info->custom_divisor = new_serial.custom_divisor;
3389 goto check_and_exit;
3393 * OK, past this point, all the error checking has been done.
3394 * At this point, we start making changes.....
3397 info->baud = new_serial.baud_base;
3398 info->custom_divisor = new_serial.custom_divisor;
3399 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3400 (new_serial.flags & ASYNC_FLAGS);
3401 info->port.close_delay = new_serial.close_delay * HZ / 100;
3402 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3405 if (info->port.flags & ASYNC_INITIALIZED) {
3406 set_line_char(info);
3409 return startup(info);
3411 } /* set_serial_info */
3414 * get_lsr_info - get line status register info
3416 * Purpose: Let user call ioctl() to get info when the UART physically
3417 * is emptied. On bus types like RS485, the transmitter must
3418 * release the bus after transmitting. This must be done when
3419 * the transmit shift register is empty, not be done when the
3420 * transmit holding register is empty. This functionality
3421 * allows an RS485 driver to be written in user space.
3423 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3425 struct cyclades_card *card;
3426 int chip, channel, index;
3427 unsigned char status;
3428 unsigned int result;
3429 unsigned long flags;
3430 void __iomem *base_addr;
3433 channel = (info->line) - (card->first_line);
3434 if (!cy_is_Z(card)) {
3435 chip = channel >> 2;
3437 index = card->bus_index;
3438 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3440 spin_lock_irqsave(&card->card_lock, flags);
3441 status = readb(base_addr + (CySRER << index)) &
3442 (CyTxRdy | CyTxMpty);
3443 spin_unlock_irqrestore(&card->card_lock, flags);
3444 result = (status ? 0 : TIOCSER_TEMT);
3446 /* Not supported yet */
3449 return put_user(result, (unsigned long __user *)value);
3452 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3454 struct cyclades_port *info = tty->driver_data;
3455 struct cyclades_card *card;
3456 int chip, channel, index;
3457 void __iomem *base_addr;
3458 unsigned long flags;
3459 unsigned char status;
3460 unsigned long lstatus;
3461 unsigned int result;
3462 struct FIRM_ID __iomem *firm_id;
3463 struct ZFW_CTRL __iomem *zfw_ctrl;
3464 struct BOARD_CTRL __iomem *board_ctrl;
3465 struct CH_CTRL __iomem *ch_ctrl;
3467 if (serial_paranoia_check(info, tty->name, __func__))
3473 channel = info->line - card->first_line;
3474 if (!cy_is_Z(card)) {
3475 chip = channel >> 2;
3477 index = card->bus_index;
3478 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3480 spin_lock_irqsave(&card->card_lock, flags);
3481 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3482 status = readb(base_addr + (CyMSVR1 << index));
3483 status |= readb(base_addr + (CyMSVR2 << index));
3484 spin_unlock_irqrestore(&card->card_lock, flags);
3486 if (info->rtsdtr_inv) {
3487 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3488 ((status & CyDTR) ? TIOCM_RTS : 0);
3490 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3491 ((status & CyDTR) ? TIOCM_DTR : 0);
3493 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3494 ((status & CyRI) ? TIOCM_RNG : 0) |
3495 ((status & CyDSR) ? TIOCM_DSR : 0) |
3496 ((status & CyCTS) ? TIOCM_CTS : 0);
3498 base_addr = card->base_addr;
3499 firm_id = card->base_addr + ID_ADDRESS;
3500 if (cyz_is_loaded(card)) {
3501 zfw_ctrl = card->base_addr +
3502 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3503 board_ctrl = &zfw_ctrl->board_ctrl;
3504 ch_ctrl = zfw_ctrl->ch_ctrl;
3505 lstatus = readl(&ch_ctrl[channel].rs_status);
3506 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3507 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3508 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3509 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3510 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3511 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3524 cy_tiocmset(struct tty_struct *tty, struct file *file,
3525 unsigned int set, unsigned int clear)
3527 struct cyclades_port *info = tty->driver_data;
3528 struct cyclades_card *card;
3529 int chip, channel, index;
3530 void __iomem *base_addr;
3531 unsigned long flags;
3532 struct FIRM_ID __iomem *firm_id;
3533 struct ZFW_CTRL __iomem *zfw_ctrl;
3534 struct BOARD_CTRL __iomem *board_ctrl;
3535 struct CH_CTRL __iomem *ch_ctrl;
3538 if (serial_paranoia_check(info, tty->name, __func__))
3542 channel = (info->line) - (card->first_line);
3543 if (!cy_is_Z(card)) {
3544 chip = channel >> 2;
3546 index = card->bus_index;
3547 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3549 if (set & TIOCM_RTS) {
3550 spin_lock_irqsave(&card->card_lock, flags);
3551 cy_writeb(base_addr + (CyCAR << index),
3553 if (info->rtsdtr_inv) {
3554 cy_writeb(base_addr + (CyMSVR2 << index),
3557 cy_writeb(base_addr + (CyMSVR1 << index),
3560 spin_unlock_irqrestore(&card->card_lock, flags);
3562 if (clear & TIOCM_RTS) {
3563 spin_lock_irqsave(&card->card_lock, flags);
3564 cy_writeb(base_addr + (CyCAR << index),
3566 if (info->rtsdtr_inv) {
3567 cy_writeb(base_addr + (CyMSVR2 << index),
3570 cy_writeb(base_addr + (CyMSVR1 << index),
3573 spin_unlock_irqrestore(&card->card_lock, flags);
3575 if (set & TIOCM_DTR) {
3576 spin_lock_irqsave(&card->card_lock, flags);
3577 cy_writeb(base_addr + (CyCAR << index),
3579 if (info->rtsdtr_inv) {
3580 cy_writeb(base_addr + (CyMSVR1 << index),
3583 cy_writeb(base_addr + (CyMSVR2 << index),
3587 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3588 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3589 readb(base_addr + (CyMSVR1 << index)),
3590 readb(base_addr + (CyMSVR2 << index)));
3592 spin_unlock_irqrestore(&card->card_lock, flags);
3594 if (clear & TIOCM_DTR) {
3595 spin_lock_irqsave(&card->card_lock, flags);
3596 cy_writeb(base_addr + (CyCAR << index),
3598 if (info->rtsdtr_inv) {
3599 cy_writeb(base_addr + (CyMSVR1 << index),
3602 cy_writeb(base_addr + (CyMSVR2 << index),
3607 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3608 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3609 readb(base_addr + (CyMSVR1 << index)),
3610 readb(base_addr + (CyMSVR2 << index)));
3612 spin_unlock_irqrestore(&card->card_lock, flags);
3615 base_addr = card->base_addr;
3617 firm_id = card->base_addr + ID_ADDRESS;
3618 if (cyz_is_loaded(card)) {
3619 zfw_ctrl = card->base_addr +
3620 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3621 board_ctrl = &zfw_ctrl->board_ctrl;
3622 ch_ctrl = zfw_ctrl->ch_ctrl;
3624 if (set & TIOCM_RTS) {
3625 spin_lock_irqsave(&card->card_lock, flags);
3626 cy_writel(&ch_ctrl[channel].rs_control,
3627 readl(&ch_ctrl[channel].rs_control) |
3629 spin_unlock_irqrestore(&card->card_lock, flags);
3631 if (clear & TIOCM_RTS) {
3632 spin_lock_irqsave(&card->card_lock, flags);
3633 cy_writel(&ch_ctrl[channel].rs_control,
3634 readl(&ch_ctrl[channel].rs_control) &
3636 spin_unlock_irqrestore(&card->card_lock, flags);
3638 if (set & TIOCM_DTR) {
3639 spin_lock_irqsave(&card->card_lock, flags);
3640 cy_writel(&ch_ctrl[channel].rs_control,
3641 readl(&ch_ctrl[channel].rs_control) |
3644 printk(KERN_DEBUG "cyc:set_modem_info raising "
3647 spin_unlock_irqrestore(&card->card_lock, flags);
3649 if (clear & TIOCM_DTR) {
3650 spin_lock_irqsave(&card->card_lock, flags);
3651 cy_writel(&ch_ctrl[channel].rs_control,
3652 readl(&ch_ctrl[channel].rs_control) &
3655 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3658 spin_unlock_irqrestore(&card->card_lock, flags);
3663 spin_lock_irqsave(&card->card_lock, flags);
3664 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3666 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3667 "was %x\n", info->line, retval);
3669 spin_unlock_irqrestore(&card->card_lock, flags);
3675 * cy_break() --- routine which turns the break handling on or off
3677 static int cy_break(struct tty_struct *tty, int break_state)
3679 struct cyclades_port *info = tty->driver_data;
3680 struct cyclades_card *card;
3681 unsigned long flags;
3684 if (serial_paranoia_check(info, tty->name, "cy_break"))
3689 spin_lock_irqsave(&card->card_lock, flags);
3690 if (!cy_is_Z(card)) {
3691 /* Let the transmit ISR take care of this (since it
3692 requires stuffing characters into the output stream).
3694 if (break_state == -1) {
3695 if (!info->breakon) {
3697 if (!info->xmit_cnt) {
3698 spin_unlock_irqrestore(&card->card_lock, flags);
3700 spin_lock_irqsave(&card->card_lock, flags);
3704 if (!info->breakoff) {
3706 if (!info->xmit_cnt) {
3707 spin_unlock_irqrestore(&card->card_lock, flags);
3709 spin_lock_irqsave(&card->card_lock, flags);
3714 if (break_state == -1) {
3715 retval = cyz_issue_cmd(card,
3716 info->line - card->first_line,
3717 C_CM_SET_BREAK, 0L);
3719 printk(KERN_ERR "cyc:cy_break (set) retval on "
3720 "ttyC%d was %x\n", info->line, retval);
3723 retval = cyz_issue_cmd(card,
3724 info->line - card->first_line,
3725 C_CM_CLR_BREAK, 0L);
3727 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3728 "on ttyC%d was %x\n", info->line,
3733 spin_unlock_irqrestore(&card->card_lock, flags);
3737 static int get_mon_info(struct cyclades_port *info,
3738 struct cyclades_monitor __user *mon)
3741 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3743 info->mon.int_count = 0;
3744 info->mon.char_count = 0;
3745 info->mon.char_max = 0;
3746 info->mon.char_last = 0;
3748 } /* get_mon_info */
3750 static int set_threshold(struct cyclades_port *info, unsigned long value)
3752 struct cyclades_card *card;
3753 void __iomem *base_addr;
3754 int channel, chip, index;
3755 unsigned long flags;
3758 channel = info->line - card->first_line;
3759 if (!cy_is_Z(card)) {
3760 chip = channel >> 2;
3762 index = card->bus_index;
3764 card->base_addr + (cy_chip_offset[chip] << index);
3766 info->cor3 &= ~CyREC_FIFO;
3767 info->cor3 |= value & CyREC_FIFO;
3769 spin_lock_irqsave(&card->card_lock, flags);
3770 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3771 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3772 spin_unlock_irqrestore(&card->card_lock, flags);
3775 } /* set_threshold */
3777 static int get_threshold(struct cyclades_port *info,
3778 unsigned long __user *value)
3780 struct cyclades_card *card;
3781 void __iomem *base_addr;
3782 int channel, chip, index;
3786 channel = info->line - card->first_line;
3787 if (!cy_is_Z(card)) {
3788 chip = channel >> 2;
3790 index = card->bus_index;
3791 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3793 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3794 return put_user(tmp, value);
3797 } /* get_threshold */
3799 static int set_default_threshold(struct cyclades_port *info,
3800 unsigned long value)
3802 info->default_threshold = value & 0x0f;
3804 } /* set_default_threshold */
3806 static int get_default_threshold(struct cyclades_port *info,
3807 unsigned long __user *value)
3809 return put_user(info->default_threshold, value);
3810 } /* get_default_threshold */
3812 static int set_timeout(struct cyclades_port *info, unsigned long value)
3814 struct cyclades_card *card;
3815 void __iomem *base_addr;
3816 int channel, chip, index;
3817 unsigned long flags;
3820 channel = info->line - card->first_line;
3821 if (!cy_is_Z(card)) {
3822 chip = channel >> 2;
3824 index = card->bus_index;
3825 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3827 spin_lock_irqsave(&card->card_lock, flags);
3828 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3829 spin_unlock_irqrestore(&card->card_lock, flags);
3834 static int get_timeout(struct cyclades_port *info,
3835 unsigned long __user *value)
3837 struct cyclades_card *card;
3838 void __iomem *base_addr;
3839 int channel, chip, index;
3843 channel = info->line - card->first_line;
3844 if (!cy_is_Z(card)) {
3845 chip = channel >> 2;
3847 index = card->bus_index;
3848 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3850 tmp = readb(base_addr + (CyRTPR << index));
3851 return put_user(tmp, value);
3856 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3858 info->default_timeout = value & 0xff;
3860 } /* set_default_timeout */
3862 static int get_default_timeout(struct cyclades_port *info,
3863 unsigned long __user *value)
3865 return put_user(info->default_timeout, value);
3866 } /* get_default_timeout */
3869 * This routine allows the tty driver to implement device-
3870 * specific ioctl's. If the ioctl number passed in cmd is
3871 * not recognized by the driver, it should return ENOIOCTLCMD.
3874 cy_ioctl(struct tty_struct *tty, struct file *file,
3875 unsigned int cmd, unsigned long arg)
3877 struct cyclades_port *info = tty->driver_data;
3878 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3879 struct serial_icounter_struct __user *p_cuser; /* user space */
3881 unsigned long flags;
3882 void __user *argp = (void __user *)arg;
3884 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3887 #ifdef CY_DEBUG_OTHER
3888 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3889 info->line, cmd, arg);
3895 ret_val = get_mon_info(info, argp);
3898 ret_val = get_threshold(info, argp);
3901 ret_val = set_threshold(info, arg);
3903 case CYGETDEFTHRESH:
3904 ret_val = get_default_threshold(info, argp);
3906 case CYSETDEFTHRESH:
3907 ret_val = set_default_threshold(info, arg);
3910 ret_val = get_timeout(info, argp);
3913 ret_val = set_timeout(info, arg);
3915 case CYGETDEFTIMEOUT:
3916 ret_val = get_default_timeout(info, argp);
3918 case CYSETDEFTIMEOUT:
3919 ret_val = set_default_timeout(info, arg);
3922 info->rflow = (int)arg;
3926 ret_val = info->rflow;
3928 case CYSETRTSDTR_INV:
3929 info->rtsdtr_inv = (int)arg;
3932 case CYGETRTSDTR_INV:
3933 ret_val = info->rtsdtr_inv;
3935 case CYGETCD1400VER:
3936 ret_val = info->chip_rev;
3938 #ifndef CONFIG_CYZ_INTR
3939 case CYZSETPOLLCYCLE:
3940 cyz_polling_cycle = (arg * HZ) / 1000;
3943 case CYZGETPOLLCYCLE:
3944 ret_val = (cyz_polling_cycle * 1000) / HZ;
3946 #endif /* CONFIG_CYZ_INTR */
3948 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3952 ret_val = info->port.closing_wait / (HZ / 100);
3955 ret_val = get_serial_info(info, argp);
3958 ret_val = set_serial_info(info, argp);
3960 case TIOCSERGETLSR: /* Get line status register */
3961 ret_val = get_lsr_info(info, argp);
3964 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3965 * - mask passed in arg for lines of interest
3966 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3967 * Caller should use TIOCGICOUNT to see which one it was
3970 spin_lock_irqsave(&info->card->card_lock, flags);
3971 /* note the counters on entry */
3972 cnow = info->icount;
3973 spin_unlock_irqrestore(&info->card->card_lock, flags);
3974 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3976 spin_lock_irqsave(&info->card->card_lock, flags);
3977 cnow = info->icount; /* atomic copy */
3978 spin_unlock_irqrestore(&info->card->card_lock, flags);
3980 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3981 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3982 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
3983 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3988 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3989 * Return: write counters to the user passed counter struct
3990 * NB: both 1->0 and 0->1 transitions are counted except for
3991 * RI where only 0->1 is counted.
3994 spin_lock_irqsave(&info->card->card_lock, flags);
3995 cnow = info->icount;
3996 spin_unlock_irqrestore(&info->card->card_lock, flags);
3998 ret_val = put_user(cnow.cts, &p_cuser->cts);
4001 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4004 ret_val = put_user(cnow.rng, &p_cuser->rng);
4007 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4010 ret_val = put_user(cnow.rx, &p_cuser->rx);
4013 ret_val = put_user(cnow.tx, &p_cuser->tx);
4016 ret_val = put_user(cnow.frame, &p_cuser->frame);
4019 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4022 ret_val = put_user(cnow.parity, &p_cuser->parity);
4025 ret_val = put_user(cnow.brk, &p_cuser->brk);
4028 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4034 ret_val = -ENOIOCTLCMD;
4038 #ifdef CY_DEBUG_OTHER
4039 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4045 * This routine allows the tty driver to be notified when
4046 * device's termios settings have changed. Note that a
4047 * well-designed tty driver should be prepared to accept the case
4048 * where old == NULL, and try to do something rational.
4050 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4052 struct cyclades_port *info = tty->driver_data;
4054 #ifdef CY_DEBUG_OTHER
4055 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4058 set_line_char(info);
4060 if ((old_termios->c_cflag & CRTSCTS) &&
4061 !(tty->termios->c_cflag & CRTSCTS)) {
4062 tty->hw_stopped = 0;
4067 * No need to wake up processes in open wait, since they
4068 * sample the CLOCAL flag once, and don't recheck it.
4069 * XXX It's not clear whether the current behavior is correct
4070 * or not. Hence, this may change.....
4072 if (!(old_termios->c_cflag & CLOCAL) &&
4073 (tty->termios->c_cflag & CLOCAL))
4074 wake_up_interruptible(&info->port.open_wait);
4076 } /* cy_set_termios */
4078 /* This function is used to send a high-priority XON/XOFF character to
4081 static void cy_send_xchar(struct tty_struct *tty, char ch)
4083 struct cyclades_port *info = tty->driver_data;
4084 struct cyclades_card *card;
4087 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4096 channel = info->line - card->first_line;
4098 if (cy_is_Z(card)) {
4099 if (ch == STOP_CHAR(tty))
4100 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4101 else if (ch == START_CHAR(tty))
4102 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4106 /* This routine is called by the upper-layer tty layer to signal
4107 that incoming characters should be throttled because the input
4108 buffers are close to full.
4110 static void cy_throttle(struct tty_struct *tty)
4112 struct cyclades_port *info = tty->driver_data;
4113 struct cyclades_card *card;
4114 unsigned long flags;
4115 void __iomem *base_addr;
4116 int chip, channel, index;
4118 #ifdef CY_DEBUG_THROTTLE
4121 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4122 tty->ldisc.chars_in_buffer(tty), info->line);
4125 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4132 cy_send_xchar(tty, STOP_CHAR(tty));
4137 if (tty->termios->c_cflag & CRTSCTS) {
4138 channel = info->line - card->first_line;
4139 if (!cy_is_Z(card)) {
4140 chip = channel >> 2;
4142 index = card->bus_index;
4143 base_addr = card->base_addr +
4144 (cy_chip_offset[chip] << index);
4146 spin_lock_irqsave(&card->card_lock, flags);
4147 cy_writeb(base_addr + (CyCAR << index),
4149 if (info->rtsdtr_inv) {
4150 cy_writeb(base_addr + (CyMSVR2 << index),
4153 cy_writeb(base_addr + (CyMSVR1 << index),
4156 spin_unlock_irqrestore(&card->card_lock, flags);
4164 * This routine notifies the tty driver that it should signal
4165 * that characters can now be sent to the tty without fear of
4166 * overrunning the input buffers of the line disciplines.
4168 static void cy_unthrottle(struct tty_struct *tty)
4170 struct cyclades_port *info = tty->driver_data;
4171 struct cyclades_card *card;
4172 unsigned long flags;
4173 void __iomem *base_addr;
4174 int chip, channel, index;
4176 #ifdef CY_DEBUG_THROTTLE
4179 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4180 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4183 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4190 cy_send_xchar(tty, START_CHAR(tty));
4193 if (tty->termios->c_cflag & CRTSCTS) {
4195 channel = info->line - card->first_line;
4196 if (!cy_is_Z(card)) {
4197 chip = channel >> 2;
4199 index = card->bus_index;
4200 base_addr = card->base_addr +
4201 (cy_chip_offset[chip] << index);
4203 spin_lock_irqsave(&card->card_lock, flags);
4204 cy_writeb(base_addr + (CyCAR << index),
4206 if (info->rtsdtr_inv) {
4207 cy_writeb(base_addr + (CyMSVR2 << index),
4210 cy_writeb(base_addr + (CyMSVR1 << index),
4213 spin_unlock_irqrestore(&card->card_lock, flags);
4218 } /* cy_unthrottle */
4220 /* cy_start and cy_stop provide software output flow control as a
4221 function of XON/XOFF, software CTS, and other such stuff.
4223 static void cy_stop(struct tty_struct *tty)
4225 struct cyclades_card *cinfo;
4226 struct cyclades_port *info = tty->driver_data;
4227 void __iomem *base_addr;
4228 int chip, channel, index;
4229 unsigned long flags;
4231 #ifdef CY_DEBUG_OTHER
4232 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4235 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4239 channel = info->line - cinfo->first_line;
4240 if (!cy_is_Z(cinfo)) {
4241 index = cinfo->bus_index;
4242 chip = channel >> 2;
4244 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4246 spin_lock_irqsave(&cinfo->card_lock, flags);
4247 cy_writeb(base_addr + (CyCAR << index),
4248 (u_char)(channel & 0x0003)); /* index channel */
4249 cy_writeb(base_addr + (CySRER << index),
4250 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4251 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4255 static void cy_start(struct tty_struct *tty)
4257 struct cyclades_card *cinfo;
4258 struct cyclades_port *info = tty->driver_data;
4259 void __iomem *base_addr;
4260 int chip, channel, index;
4261 unsigned long flags;
4263 #ifdef CY_DEBUG_OTHER
4264 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4267 if (serial_paranoia_check(info, tty->name, "cy_start"))
4271 channel = info->line - cinfo->first_line;
4272 index = cinfo->bus_index;
4273 if (!cy_is_Z(cinfo)) {
4274 chip = channel >> 2;
4276 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4278 spin_lock_irqsave(&cinfo->card_lock, flags);
4279 cy_writeb(base_addr + (CyCAR << index),
4280 (u_char) (channel & 0x0003)); /* index channel */
4281 cy_writeb(base_addr + (CySRER << index),
4282 readb(base_addr + (CySRER << index)) | CyTxRdy);
4283 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4288 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4290 static void cy_hangup(struct tty_struct *tty)
4292 struct cyclades_port *info = tty->driver_data;
4294 #ifdef CY_DEBUG_OTHER
4295 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4298 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4301 cy_flush_buffer(tty);
4303 info->port.count = 0;
4304 #ifdef CY_DEBUG_COUNT
4305 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4308 info->port.tty = NULL;
4309 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4310 wake_up_interruptible(&info->port.open_wait);
4314 * ---------------------------------------------------------------------
4315 * cy_init() and friends
4317 * cy_init() is called at boot-time to initialize the serial driver.
4318 * ---------------------------------------------------------------------
4321 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4323 struct cyclades_port *info;
4325 unsigned short chip_number;
4327 spin_lock_init(&cinfo->card_lock);
4328 cinfo->intr_enabled = 0;
4330 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
4332 if (cinfo->ports == NULL) {
4333 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4337 for (port = cinfo->first_line; port < cinfo->first_line + cinfo->nports;
4339 info = &cinfo->ports[port - cinfo->first_line];
4340 tty_port_init(&info->port);
4341 info->magic = CYCLADES_MAGIC;
4345 info->port.closing_wait = CLOSING_WAIT_DELAY;
4346 info->port.close_delay = 5 * HZ / 10;
4347 info->port.flags = STD_COM_FLAGS;
4348 init_completion(&info->shutdown_wait);
4349 init_waitqueue_head(&info->delta_msr_wait);
4351 if (cy_is_Z(cinfo)) {
4352 info->type = PORT_STARTECH;
4353 if (cinfo->hw_ver == ZO_V1)
4354 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4356 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4357 #ifdef CONFIG_CYZ_INTR
4358 setup_timer(&cyz_rx_full_timer[port],
4359 cyz_rx_restart, (unsigned long)info);
4362 int index = cinfo->bus_index;
4363 info->type = PORT_CIRRUS;
4364 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4365 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4367 info->cor3 = 0x08; /* _very_ small rcv threshold */
4369 chip_number = (port - cinfo->first_line) / 4;
4370 info->chip_rev = readb(cinfo->base_addr +
4371 (cy_chip_offset[chip_number] << index) +
4372 (CyGFRCR << index));
4374 if (info->chip_rev >= CD1400_REV_J) {
4375 /* It is a CD1400 rev. J or later */
4376 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4377 info->tco = baud_co_60[13]; /* Tx CO */
4378 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4379 info->rco = baud_co_60[13]; /* Rx CO */
4380 info->rtsdtr_inv = 1;
4382 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4383 info->tco = baud_co_25[13]; /* Tx CO */
4384 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4385 info->rco = baud_co_25[13]; /* Rx CO */
4386 info->rtsdtr_inv = 0;
4388 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4389 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4394 #ifndef CONFIG_CYZ_INTR
4395 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
4396 mod_timer(&cyz_timerlist, jiffies + 1);
4398 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4405 /* initialize chips on Cyclom-Y card -- return number of valid
4406 chips (which is number of ports/4) */
4407 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4410 unsigned int chip_number;
4411 void __iomem *base_addr;
4413 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4414 /* Cy_HwReset is 0x1400 */
4415 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4416 /* Cy_ClrIntr is 0x1800 */
4419 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4422 true_base_addr + (cy_chip_offset[chip_number] << index);
4424 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4426 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4427 chip_number, (unsigned long)base_addr);
4432 cy_writeb(base_addr + (CyGFRCR << index), 0);
4435 /* The Cyclom-16Y does not decode address bit 9 and therefore
4436 cannot distinguish between references to chip 0 and a non-
4437 existent chip 4. If the preceding clearing of the supposed
4438 chip 4 GFRCR register appears at chip 0, there is no chip 4
4439 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4441 if (chip_number == 4 && readb(true_base_addr +
4442 (cy_chip_offset[0] << index) +
4443 (CyGFRCR << index)) == 0) {
4447 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4450 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4452 printk(" chip #%d at %#6lx is not responding ",
4453 chip_number, (unsigned long)base_addr);
4454 printk("(GFRCR stayed 0)\n",
4458 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4461 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4463 chip_number, (unsigned long)base_addr,
4464 base_addr[CyGFRCR<<index]);
4468 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4469 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4470 /* It is a CD1400 rev. J or later */
4471 /* Impossible to reach 5ms with this chip.
4472 Changed to 2ms instead (f = 500 Hz). */
4473 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4476 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4480 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4481 chip_number, (unsigned long)base_addr,
4482 readb(base_addr+(CyGFRCR<<index)));
4486 } /* cyy_init_card */
4489 * ---------------------------------------------------------------------
4490 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4491 * sets global variables and return the number of ISA boards found.
4492 * ---------------------------------------------------------------------
4494 static int __init cy_detect_isa(void)
4497 unsigned short cy_isa_irq, nboard;
4498 void __iomem *cy_isa_address;
4499 unsigned short i, j, cy_isa_nchan;
4507 /* Check for module parameters */
4508 for (i = 0; i < NR_CARDS; i++) {
4509 if (maddr[i] || i) {
4511 cy_isa_addresses[i] = maddr[i];
4518 /* scan the address table probing for Cyclom-Y/ISA boards */
4519 for (i = 0; i < NR_ISA_ADDRS; i++) {
4520 unsigned int isa_address = cy_isa_addresses[i];
4521 if (isa_address == 0x0000)
4524 /* probe for CD1400... */
4525 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4526 if (cy_isa_address == NULL) {
4527 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4531 cy_isa_nchan = CyPORTS_PER_CHIP *
4532 cyy_init_card(cy_isa_address, 0);
4533 if (cy_isa_nchan == 0) {
4534 iounmap(cy_isa_address);
4538 if (isparam && irq[i])
4539 cy_isa_irq = irq[i];
4542 /* find out the board's irq by probing */
4543 cy_isa_irq = detect_isa_irq(cy_isa_address);
4544 if (cy_isa_irq == 0) {
4545 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4546 "IRQ could not be detected.\n",
4547 (unsigned long)cy_isa_address);
4548 iounmap(cy_isa_address);
4552 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4553 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4554 "more channels are available. Change NR_PORTS "
4555 "in cyclades.c and recompile kernel.\n",
4556 (unsigned long)cy_isa_address);
4557 iounmap(cy_isa_address);
4560 /* fill the next cy_card structure available */
4561 for (j = 0; j < NR_CARDS; j++) {
4562 if (cy_card[j].base_addr == NULL)
4565 if (j == NR_CARDS) { /* no more cy_cards available */
4566 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4567 "more cards can be used. Change NR_CARDS in "
4568 "cyclades.c and recompile kernel.\n",
4569 (unsigned long)cy_isa_address);
4570 iounmap(cy_isa_address);
4575 if (request_irq(cy_isa_irq, cyy_interrupt,
4576 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4577 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4578 "could not allocate IRQ#%d.\n",
4579 (unsigned long)cy_isa_address, cy_isa_irq);
4580 iounmap(cy_isa_address);
4585 cy_card[j].base_addr = cy_isa_address;
4586 cy_card[j].ctl_addr.p9050 = NULL;
4587 cy_card[j].irq = (int)cy_isa_irq;
4588 cy_card[j].bus_index = 0;
4589 cy_card[j].first_line = cy_next_channel;
4590 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
4591 cy_card[j].nports = cy_isa_nchan;
4592 if (cy_init_card(&cy_card[j])) {
4593 cy_card[j].base_addr = NULL;
4594 free_irq(cy_isa_irq, &cy_card[j]);
4595 iounmap(cy_isa_address);
4600 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4601 "%d channels starting from port %d\n",
4602 j + 1, (unsigned long)cy_isa_address,
4603 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4604 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4606 for (j = cy_next_channel;
4607 j < cy_next_channel + cy_isa_nchan; j++)
4608 tty_register_device(cy_serial_driver, j, NULL);
4609 cy_next_channel += cy_isa_nchan;
4614 #endif /* CONFIG_ISA */
4615 } /* cy_detect_isa */
4618 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4622 for (a = 0; a < size && *str; a++, str++)
4626 for (; a < size; a++, str++)
4633 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4636 for (; size > 0; size--) {
4637 cy_writel(fpga, *data++);
4642 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4643 struct RUNTIME_9060 __iomem *addr)
4646 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4648 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4650 /* Reload Config. Registers from EEPROM */
4651 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4653 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4655 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4656 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4657 * registers. This will remain here until we find a permanent fix.
4659 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4662 static int __devinit __cyz_load_fw(const struct firmware *fw,
4663 const char *name, const u32 mailbox, void __iomem *base,
4666 const void *ptr = fw->data;
4667 const struct zfile_header *h = ptr;
4668 const struct zfile_config *c, *cs;
4669 const struct zfile_block *b, *bs;
4670 unsigned int a, tmp, len = fw->size;
4671 #define BAD_FW KERN_ERR "Bad firmware: "
4672 if (len < sizeof(*h)) {
4673 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4677 cs = ptr + h->config_offset;
4678 bs = ptr + h->block_offset;
4680 if ((void *)(cs + h->n_config) > ptr + len ||
4681 (void *)(bs + h->n_blocks) > ptr + len) {
4682 printk(BAD_FW "too short");
4686 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4687 cyc_isfwstr(h->date, sizeof(h->date))) {
4688 printk(BAD_FW "bad formatted header string\n");
4692 if (strncmp(name, h->name, sizeof(h->name))) {
4693 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4698 for (c = cs; c < cs + h->n_config; c++) {
4699 for (a = 0; a < c->n_blocks; a++)
4700 if (c->block_list[a] > h->n_blocks) {
4701 printk(BAD_FW "bad block ref number in cfgs\n");
4704 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4708 printk(BAD_FW "nothing appropriate\n");
4712 for (b = bs; b < bs + h->n_blocks; b++)
4713 if (b->file_offset + b->size > len) {
4714 printk(BAD_FW "bad block data offset\n");
4718 /* everything is OK, let's seek'n'load it */
4719 for (c = cs; c < cs + h->n_config; c++)
4720 if (c->mailbox == mailbox && c->function == 0)
4723 for (a = 0; a < c->n_blocks; a++) {
4724 b = &bs[c->block_list[a]];
4725 if (b->type == ZBLOCK_FPGA) {
4727 cyz_fpga_copy(fpga, ptr + b->file_offset,
4731 memcpy_toio(base + b->ram_offset,
4732 ptr + b->file_offset, b->size);
4739 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4740 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4742 const struct firmware *fw;
4743 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4744 struct CUSTOM_REG __iomem *cust = base_addr;
4745 struct ZFW_CTRL __iomem *pt_zfwctrl;
4747 u32 mailbox, status, nchan;
4751 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4753 dev_err(&pdev->dev, "can't get firmware\n");
4757 /* Check whether the firmware is already loaded and running. If
4758 positive, skip this board */
4759 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4760 u32 cntval = readl(base_addr + 0x190);
4763 if (cntval != readl(base_addr + 0x190)) {
4764 /* FW counter is working, FW is running */
4765 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4766 "Skipping board.\n");
4773 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4776 mailbox = readl(&ctl_addr->mail_box_0);
4778 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
4779 /* stops CPU and set window to beginning of RAM */
4780 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4781 cy_writel(&cust->cpu_stop, 0);
4782 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4786 plx_init(pdev, irq, ctl_addr);
4790 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4794 if (!__cyz_fpga_loaded(ctl_addr)) {
4795 dev_err(&pdev->dev, "fw upload successful, but fw is "
4801 /* stops CPU and set window to beginning of RAM */
4802 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4803 cy_writel(&cust->cpu_stop, 0);
4804 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4808 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4809 cy_writeb(tmp, 255);
4811 /* set window to last 512K of RAM */
4812 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4813 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4814 cy_writeb(tmp, 255);
4815 /* set window to beginning of RAM */
4816 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4819 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4820 release_firmware(fw);
4824 /* finish boot and start boards */
4825 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4826 cy_writel(&cust->cpu_start, 0);
4827 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4829 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4831 if (status != ZFIRM_ID) {
4832 if (status == ZFIRM_HLT) {
4833 dev_err(&pdev->dev, "you need an external power supply "
4834 "for this number of ports. Firmware halted and "
4839 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4840 "some more time\n", status);
4841 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4844 if (status != ZFIRM_ID) {
4845 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4846 "Giving up. (fid->signature = 0x%x)\n",
4848 dev_info(&pdev->dev, "*** Warning ***: if you are "
4849 "upgrading the FW, please power cycle the "
4850 "system before loading the new FW to the "
4853 if (__cyz_fpga_loaded(ctl_addr))
4854 plx_init(pdev, irq, ctl_addr);
4859 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4862 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4864 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4865 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4866 base_addr + readl(&fid->zfwctrl_addr));
4868 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
4869 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4870 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
4873 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4874 "check the connection between the Z host card and the "
4875 "serial expanders.\n");
4877 if (__cyz_fpga_loaded(ctl_addr))
4878 plx_init(pdev, irq, ctl_addr);
4880 dev_info(&pdev->dev, "Null number of ports detected. Board "
4886 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4887 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4890 Early firmware failed to start looking for commands.
4891 This enables firmware interrupts for those commands.
4893 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4895 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4900 release_firmware(fw);
4905 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4906 const struct pci_device_id *ent)
4908 void __iomem *addr0 = NULL, *addr2 = NULL;
4909 char *card_name = NULL;
4910 u32 uninitialized_var(mailbox);
4911 unsigned int device_id, nchan = 0, card_no, i;
4912 unsigned char plx_ver;
4915 retval = pci_enable_device(pdev);
4917 dev_err(&pdev->dev, "cannot enable device\n");
4921 /* read PCI configuration area */
4923 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4925 #if defined(__alpha__)
4926 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4927 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4928 "addresses on Alpha systems.\n");
4933 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4934 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4940 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4941 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4943 pdev->resource[2].flags &= ~IORESOURCE_IO;
4946 retval = pci_request_regions(pdev, "cyclades");
4948 dev_err(&pdev->dev, "failed to reserve resources\n");
4953 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4954 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4955 card_name = "Cyclom-Y";
4957 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4959 if (addr0 == NULL) {
4960 dev_err(&pdev->dev, "can't remap ctl region\n");
4963 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4965 if (addr2 == NULL) {
4966 dev_err(&pdev->dev, "can't remap base region\n");
4970 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4972 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4973 "Serial-Modules\n");
4976 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4977 struct RUNTIME_9060 __iomem *ctl_addr;
4979 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4981 if (addr0 == NULL) {
4982 dev_err(&pdev->dev, "can't remap ctl region\n");
4986 /* Disable interrupts on the PLX before resetting it */
4987 cy_writew(&ctl_addr->intr_ctrl_stat,
4988 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
4990 plx_init(pdev, irq, addr0);
4992 mailbox = readl(&ctl_addr->mail_box_0);
4994 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4995 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
4996 if (addr2 == NULL) {
4997 dev_err(&pdev->dev, "can't remap base region\n");
5001 if (mailbox == ZE_V1) {
5002 card_name = "Cyclades-Ze";
5004 card_name = "Cyclades-8Zo";
5006 if (mailbox == ZO_V1) {
5007 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5008 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5009 "id %lx, ver %lx\n", (ulong)(0xff &
5010 readl(&((struct CUSTOM_REG *)addr2)->
5011 fpga_id)), (ulong)(0xff &
5012 readl(&((struct CUSTOM_REG *)addr2)->
5014 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5016 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5017 "Cyclades-Z board. FPGA not loaded\n");
5020 /* The following clears the firmware id word. This
5021 ensures that the driver will not attempt to talk to
5022 the board until it has been properly initialized.
5024 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5025 cy_writel(addr2 + ID_ADDRESS, 0L);
5028 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5034 if ((cy_next_channel + nchan) > NR_PORTS) {
5035 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5036 "channels are available. Change NR_PORTS in "
5037 "cyclades.c and recompile kernel.\n");
5040 /* fill the next cy_card structure available */
5041 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5042 if (cy_card[card_no].base_addr == NULL)
5045 if (card_no == NR_CARDS) { /* no more cy_cards available */
5046 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5047 "more cards can be used. Change NR_CARDS in "
5048 "cyclades.c and recompile kernel.\n");
5052 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5053 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5055 retval = request_irq(irq, cyy_interrupt,
5056 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5058 dev_err(&pdev->dev, "could not allocate IRQ\n");
5061 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
5063 cy_card[card_no].hw_ver = mailbox;
5064 cy_card[card_no].num_chips = (unsigned int)-1;
5065 #ifdef CONFIG_CYZ_INTR
5066 /* allocate IRQ only if board has an IRQ */
5067 if (irq != 0 && irq != 255) {
5068 retval = request_irq(irq, cyz_interrupt,
5069 IRQF_SHARED, "Cyclades-Z",
5072 dev_err(&pdev->dev, "could not allocate IRQ\n");
5076 #endif /* CONFIG_CYZ_INTR */
5080 cy_card[card_no].base_addr = addr2;
5081 cy_card[card_no].ctl_addr.p9050 = addr0;
5082 cy_card[card_no].irq = irq;
5083 cy_card[card_no].bus_index = 1;
5084 cy_card[card_no].first_line = cy_next_channel;
5085 cy_card[card_no].nports = nchan;
5086 retval = cy_init_card(&cy_card[card_no]);
5090 pci_set_drvdata(pdev, &cy_card[card_no]);
5092 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5093 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5094 /* enable interrupts in the PCI interface */
5095 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5098 cy_writeb(addr0 + 0x4c, 0x43);
5103 default: /* Old boards, use PLX_9060 */
5105 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5106 plx_init(pdev, irq, ctl_addr);
5107 cy_writew(&ctl_addr->intr_ctrl_stat,
5108 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
5114 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5115 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5116 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5117 tty_register_device(cy_serial_driver, i, &pdev->dev);
5118 cy_next_channel += nchan;
5122 cy_card[card_no].base_addr = NULL;
5123 free_irq(irq, &cy_card[card_no]);
5129 pci_release_regions(pdev);
5131 pci_disable_device(pdev);
5136 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5138 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5141 /* non-Z with old PLX */
5142 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5144 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
5146 #ifndef CONFIG_CYZ_INTR
5147 if (!cy_is_Z(cinfo))
5149 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5150 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5153 iounmap(cinfo->base_addr);
5154 if (cinfo->ctl_addr.p9050)
5155 iounmap(cinfo->ctl_addr.p9050);
5157 #ifndef CONFIG_CYZ_INTR
5159 #endif /* CONFIG_CYZ_INTR */
5161 free_irq(cinfo->irq, cinfo);
5162 pci_release_regions(pdev);
5164 cinfo->base_addr = NULL;
5165 for (i = cinfo->first_line; i < cinfo->first_line +
5167 tty_unregister_device(cy_serial_driver, i);
5169 kfree(cinfo->ports);
5172 static struct pci_driver cy_pci_driver = {
5174 .id_table = cy_pci_dev_id,
5175 .probe = cy_pci_probe,
5176 .remove = __devexit_p(cy_pci_remove)
5180 static int cyclades_proc_show(struct seq_file *m, void *v)
5182 struct cyclades_port *info;
5184 __u32 cur_jifs = jiffies;
5186 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
5187 "IdleIn Overruns Ldisc\n");
5189 /* Output one line for each known port */
5190 for (i = 0; i < NR_CARDS; i++)
5191 for (j = 0; j < cy_card[i].nports; j++) {
5192 info = &cy_card[i].ports[j];
5194 if (info->port.count)
5195 seq_printf(m, "%3d %8lu %10lu %8lu "
5196 "%10lu %8lu %9lu %6ld\n", info->line,
5197 (cur_jifs - info->idle_stats.in_use) /
5198 HZ, info->idle_stats.xmit_bytes,
5199 (cur_jifs - info->idle_stats.xmit_idle)/
5200 HZ, info->idle_stats.recv_bytes,
5201 (cur_jifs - info->idle_stats.recv_idle)/
5202 HZ, info->idle_stats.overruns,
5203 /* FIXME: double check locking */
5204 (long)info->port.tty->ldisc->ops->num);
5206 seq_printf(m, "%3d %8lu %10lu %8lu "
5207 "%10lu %8lu %9lu %6ld\n",
5208 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5213 static int cyclades_proc_open(struct inode *inode, struct file *file)
5215 return single_open(file, cyclades_proc_show, NULL);
5218 static const struct file_operations cyclades_proc_fops = {
5219 .owner = THIS_MODULE,
5220 .open = cyclades_proc_open,
5222 .llseek = seq_lseek,
5223 .release = single_release,
5226 /* The serial driver boot-time initialization code!
5227 Hardware I/O ports are mapped to character special devices on a
5228 first found, first allocated manner. That is, this code searches
5229 for Cyclom cards in the system. As each is found, it is probed
5230 to discover how many chips (and thus how many ports) are present.
5231 These ports are mapped to the tty ports 32 and upward in monotonic
5232 fashion. If an 8-port card is replaced with a 16-port card, the
5233 port mapping on a following card will shift.
5235 This approach is different from what is used in the other serial
5236 device driver because the Cyclom is more properly a multiplexer,
5237 not just an aggregation of serial ports on one card.
5239 If there are more cards with more ports than have been
5240 statically allocated above, a warning is printed and the
5241 extra ports are ignored.
5244 static const struct tty_operations cy_ops = {
5248 .put_char = cy_put_char,
5249 .flush_chars = cy_flush_chars,
5250 .write_room = cy_write_room,
5251 .chars_in_buffer = cy_chars_in_buffer,
5252 .flush_buffer = cy_flush_buffer,
5254 .throttle = cy_throttle,
5255 .unthrottle = cy_unthrottle,
5256 .set_termios = cy_set_termios,
5259 .hangup = cy_hangup,
5260 .break_ctl = cy_break,
5261 .wait_until_sent = cy_wait_until_sent,
5262 .tiocmget = cy_tiocmget,
5263 .tiocmset = cy_tiocmset,
5264 .proc_fops = &cyclades_proc_fops,
5267 static int __init cy_init(void)
5269 unsigned int nboards;
5270 int retval = -ENOMEM;
5272 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5273 if (!cy_serial_driver)
5276 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5277 __DATE__, __TIME__);
5279 /* Initialize the tty_driver structure */
5281 cy_serial_driver->owner = THIS_MODULE;
5282 cy_serial_driver->driver_name = "cyclades";
5283 cy_serial_driver->name = "ttyC";
5284 cy_serial_driver->major = CYCLADES_MAJOR;
5285 cy_serial_driver->minor_start = 0;
5286 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5287 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5288 cy_serial_driver->init_termios = tty_std_termios;
5289 cy_serial_driver->init_termios.c_cflag =
5290 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5291 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5292 tty_set_operations(cy_serial_driver, &cy_ops);
5294 retval = tty_register_driver(cy_serial_driver);
5296 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5300 /* the code below is responsible to find the boards. Each different
5301 type of board has its own detection routine. If a board is found,
5302 the next cy_card structure available is set by the detection
5303 routine. These functions are responsible for checking the
5304 availability of cy_card and cy_port data structures and updating
5305 the cy_next_channel. */
5307 /* look for isa boards */
5308 nboards = cy_detect_isa();
5311 /* look for pci boards */
5312 retval = pci_register_driver(&cy_pci_driver);
5313 if (retval && !nboards) {
5314 tty_unregister_driver(cy_serial_driver);
5321 put_tty_driver(cy_serial_driver);
5326 static void __exit cy_cleanup_module(void)
5328 struct cyclades_card *card;
5331 #ifndef CONFIG_CYZ_INTR
5332 del_timer_sync(&cyz_timerlist);
5333 #endif /* CONFIG_CYZ_INTR */
5335 e1 = tty_unregister_driver(cy_serial_driver);
5337 printk(KERN_ERR "failed to unregister Cyclades serial "
5338 "driver(%d)\n", e1);
5341 pci_unregister_driver(&cy_pci_driver);
5344 for (i = 0; i < NR_CARDS; i++) {
5346 if (card->base_addr) {
5347 /* clear interrupt */
5348 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5349 iounmap(card->base_addr);
5350 if (card->ctl_addr.p9050)
5351 iounmap(card->ctl_addr.p9050);
5353 #ifndef CONFIG_CYZ_INTR
5355 #endif /* CONFIG_CYZ_INTR */
5357 free_irq(card->irq, card);
5358 for (e1 = card->first_line; e1 < card->first_line +
5360 tty_unregister_device(cy_serial_driver, e1);
5365 put_tty_driver(cy_serial_driver);
5366 } /* cy_cleanup_module */
5368 module_init(cy_init);
5369 module_exit(cy_cleanup_module);
5371 MODULE_LICENSE("GPL");
5372 MODULE_VERSION(CY_VERSION);
5373 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);