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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / usb / serial / whiteheat.c
blobcf3bc30675a1529068c9ee4e2b6d15a4786fbe31
1 /*
2 * USB ConnectTech WhiteHEAT driver
3 *
4 * Copyright (C) 2002
5 * Connect Tech Inc.
6 *
7 * Copyright (C) 1999 - 2001
8 * Greg Kroah-Hartman (greg@kroah.com)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * See Documentation/usb/usb-serial.txt for more information on using this driver
16 *
17 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
18 * Upgrade to full working driver
19 *
20 * (05/30/2001) gkh
21 * switched from using spinlock to a semaphore, which fixes lots of problems.
22 *
23 * (04/08/2001) gb
24 * Identify version on module load.
25 *
26 * 2001_Mar_19 gkh
27 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
28 * than once, and the got the proper usb_device_id table entries so
29 * the driver works again.
30 *
31 * (11/01/2000) Adam J. Richter
32 * usb_device_id table support
33 *
34 * (10/05/2000) gkh
35 * Fixed bug with urb->dev not being set properly, now that the usb
36 * core needs it.
37 *
38 * (10/03/2000) smd
39 * firmware is improved to guard against crap sent to device
40 * firmware now replies CMD_FAILURE on bad things
41 * read_callback fix you provided for private info struct
42 * command_finished now indicates success or fail
43 * setup_port struct now packed to avoid gcc padding
44 * firmware uses 1 based port numbering, driver now handles that
45 *
46 * (09/11/2000) gkh
47 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
48 *
49 * (07/19/2000) gkh
50 * Added module_init and module_exit functions to handle the fact that this
51 * driver is a loadable module now.
52 * Fixed bug with port->minor that was found by Al Borchers
53 *
54 * (07/04/2000) gkh
55 * Added support for port settings. Baud rate can now be changed. Line signals
56 * are not transferred to and from the tty layer yet, but things seem to be
57 * working well now.
58 *
59 * (05/04/2000) gkh
60 * First cut at open and close commands. Data can flow through the ports at
61 * default speeds now.
62 *
63 * (03/26/2000) gkh
64 * Split driver up into device specific pieces.
65 *
66 */
67
68 #include <linux/config.h>
69 #include <linux/kernel.h>
70 #include <linux/errno.h>
71 #include <linux/init.h>
72 #include <linux/slab.h>
73 #include <linux/tty.h>
74 #include <linux/tty_driver.h>
75 #include <linux/tty_flip.h>
76 #include <linux/module.h>
77 #include <linux/spinlock.h>
78 #include <asm/uaccess.h>
79 #include <asm/termbits.h>
80 #include <linux/usb.h>
81 #include <linux/serial_reg.h>
82 #include <linux/serial.h>
83 #include "usb-serial.h"
84 #include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
85 #include "whiteheat.h" /* WhiteHEAT specific commands */
86
87 static int debug;
88
89 #ifndef CMSPAR
90 #define CMSPAR 0
91 #endif
92
93 /*
94 * Version Information
95 */
96 #define DRIVER_VERSION "v2.0"
97 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
98 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
99
100 #define CONNECT_TECH_VENDOR_ID 0x0710
101 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
102 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
103
104 /*
105 ID tables for whiteheat are unusual, because we want to different
106 things for different versions of the device. Eventually, this
107 will be doable from a single table. But, for now, we define two
108 separate ID tables, and then a third table that combines them
109 just for the purpose of exporting the autoloading information.
110 */
111 static struct usb_device_id id_table_std [] = {
112 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
113 { } /* Terminating entry */
114 };
115
116 static struct usb_device_id id_table_prerenumeration [] = {
117 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
118 { } /* Terminating entry */
119 };
120
121 static struct usb_device_id id_table_combined [] = {
122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
123 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
124 { } /* Terminating entry */
125 };
126
127 MODULE_DEVICE_TABLE (usb, id_table_combined);
128
129 static struct usb_driver whiteheat_driver = {
130 .owner = THIS_MODULE,
131 .name = "whiteheat",
132 .probe = usb_serial_probe,
133 .disconnect = usb_serial_disconnect,
134 .id_table = id_table_combined,
135 };
136
137 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
138 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
139 static int whiteheat_firmware_attach (struct usb_serial *serial);
140
141 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
142 static int whiteheat_attach (struct usb_serial *serial);
143 static void whiteheat_shutdown (struct usb_serial *serial);
144 static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
145 static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
146 static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count);
147 static int whiteheat_write_room (struct usb_serial_port *port);
148 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
149 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old);
150 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file);
151 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
152 static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state);
153 static int whiteheat_chars_in_buffer (struct usb_serial_port *port);
154 static void whiteheat_throttle (struct usb_serial_port *port);
155 static void whiteheat_unthrottle (struct usb_serial_port *port);
156 static void whiteheat_read_callback (struct urb *urb, struct pt_regs *regs);
157 static void whiteheat_write_callback (struct urb *urb, struct pt_regs *regs);
158
159 static struct usb_serial_device_type whiteheat_fake_device = {
160 .owner = THIS_MODULE,
161 .name = "Connect Tech - WhiteHEAT - (prerenumeration)",
162 .short_name = "whiteheatnofirm",
163 .id_table = id_table_prerenumeration,
164 .num_interrupt_in = NUM_DONT_CARE,
165 .num_bulk_in = NUM_DONT_CARE,
166 .num_bulk_out = NUM_DONT_CARE,
167 .num_ports = 1,
168 .probe = whiteheat_firmware_download,
169 .attach = whiteheat_firmware_attach,
170 };
171
172 static struct usb_serial_device_type whiteheat_device = {
173 .owner = THIS_MODULE,
174 .name = "Connect Tech - WhiteHEAT",
175 .short_name = "whiteheat",
176 .id_table = id_table_std,
177 .num_interrupt_in = NUM_DONT_CARE,
178 .num_bulk_in = NUM_DONT_CARE,
179 .num_bulk_out = NUM_DONT_CARE,
180 .num_ports = 4,
181 .attach = whiteheat_attach,
182 .shutdown = whiteheat_shutdown,
183 .open = whiteheat_open,
184 .close = whiteheat_close,
185 .write = whiteheat_write,
186 .write_room = whiteheat_write_room,
187 .ioctl = whiteheat_ioctl,
188 .set_termios = whiteheat_set_termios,
189 .break_ctl = whiteheat_break_ctl,
190 .tiocmget = whiteheat_tiocmget,
191 .tiocmset = whiteheat_tiocmset,
192 .chars_in_buffer = whiteheat_chars_in_buffer,
193 .throttle = whiteheat_throttle,
194 .unthrottle = whiteheat_unthrottle,
195 .read_bulk_callback = whiteheat_read_callback,
196 .write_bulk_callback = whiteheat_write_callback,
197 };
198
199
200 struct whiteheat_command_private {
201 spinlock_t lock;
202 __u8 port_running;
203 __u8 command_finished;
204 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
205 __u8 result_buffer[64];
206 };
207
208
209 #define THROTTLED 0x01
210 #define ACTUALLY_THROTTLED 0x02
211
212 static int urb_pool_size = 8;
213
214 struct whiteheat_urb_wrap {
215 struct list_head list;
216 struct urb *urb;
217 };
218
219 struct whiteheat_private {
220 spinlock_t lock;
221 __u8 flags;
222 __u8 mcr;
223 struct list_head rx_urbs_free;
224 struct list_head rx_urbs_submitted;
225 struct list_head rx_urb_q;
226 struct work_struct rx_work;
227 struct list_head tx_urbs_free;
228 struct list_head tx_urbs_submitted;
229 };
230
231
232 /* local function prototypes */
233 static int start_command_port(struct usb_serial *serial);
234 static void stop_command_port(struct usb_serial *serial);
235 static void command_port_write_callback(struct urb *urb, struct pt_regs *regs);
236 static void command_port_read_callback(struct urb *urb, struct pt_regs *regs);
237
238 static int start_port_read(struct usb_serial_port *port);
239 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
240 static struct list_head *list_first(struct list_head *head);
241 static void rx_data_softint(void *private);
242
243 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
244 static int firm_open(struct usb_serial_port *port);
245 static int firm_close(struct usb_serial_port *port);
246 static int firm_setup_port(struct usb_serial_port *port);
247 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
248 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
249 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
250 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
251 static int firm_get_dtr_rts(struct usb_serial_port *port);
252 static int firm_report_tx_done(struct usb_serial_port *port);
253
254
255 #define COMMAND_PORT 4
256 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
257 #define COMMAND_TIMEOUT_MS 2000
258 #define CLOSING_DELAY (30 * HZ)
259
260
261 /*****************************************************************************
262 * Connect Tech's White Heat prerenumeration driver functions
263 *****************************************************************************/
264
265 /* steps to download the firmware to the WhiteHEAT device:
266 - hold the reset (by writing to the reset bit of the CPUCS register)
267 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
268 - release the reset (by writing to the CPUCS register)
269 - download the WH.HEX file for all addresses greater than 0x1b3f using
270 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
271 - hold the reset
272 - download the WH.HEX file for all addresses less than 0x1b40 using
273 VENDOR_REQUEST_ANCHOR_LOAD
274 - release the reset
275 - device renumerated itself and comes up as new device id with all
276 firmware download completed.
277 */
278 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
279 {
280 int response;
281 const struct whiteheat_hex_record *record;
282
283 dbg("%s", __FUNCTION__);
284
285 response = ezusb_set_reset (serial, 1);
286
287 record = &whiteheat_loader[0];
288 while (record->address != 0xffff) {
289 response = ezusb_writememory (serial, record->address,
290 (unsigned char *)record->data, record->data_size, 0xa0);
291 if (response < 0) {
292 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
293 __FUNCTION__, response, record->address, record->data, record->data_size);
294 break;
295 }
296 ++record;
297 }
298
299 response = ezusb_set_reset (serial, 0);
300
301 record = &whiteheat_firmware[0];
302 while (record->address < 0x1b40) {
303 ++record;
304 }
305 while (record->address != 0xffff) {
306 response = ezusb_writememory (serial, record->address,
307 (unsigned char *)record->data, record->data_size, 0xa3);
308 if (response < 0) {
309 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
310 __FUNCTION__, response, record->address, record->data, record->data_size);
311 break;
312 }
313 ++record;
314 }
315
316 response = ezusb_set_reset (serial, 1);
317
318 record = &whiteheat_firmware[0];
319 while (record->address < 0x1b40) {
320 response = ezusb_writememory (serial, record->address,
321 (unsigned char *)record->data, record->data_size, 0xa0);
322 if (response < 0) {
323 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
324 __FUNCTION__, response, record->address, record->data, record->data_size);
325 break;
326 }
327 ++record;
328 }
329
330 response = ezusb_set_reset (serial, 0);
331
332 return 0;
333 }
334
335
336 static int whiteheat_firmware_attach (struct usb_serial *serial)
337 {
338 /* We want this device to fail to have a driver assigned to it */
339 return 1;
340 }
341
342
343 /*****************************************************************************
344 * Connect Tech's White Heat serial driver functions
345 *****************************************************************************/
346 static int whiteheat_attach (struct usb_serial *serial)
347 {
348 struct usb_serial_port *command_port;
349 struct whiteheat_command_private *command_info;
350 struct usb_serial_port *port;
351 struct whiteheat_private *info;
352 struct whiteheat_hw_info *hw_info;
353 int pipe;
354 int ret;
355 int alen;
356 __u8 *command;
357 __u8 *result;
358 int i;
359 int j;
360 struct urb *urb;
361 int buf_size;
362 struct whiteheat_urb_wrap *wrap;
363 struct list_head *tmp;
364
365 command_port = serial->port[COMMAND_PORT];
366
367 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
368 command = kmalloc(2, GFP_KERNEL);
369 if (!command)
370 goto no_command_buffer;
371 command[0] = WHITEHEAT_GET_HW_INFO;
372 command[1] = 0;
373
374 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
375 if (!result)
376 goto no_result_buffer;
377 /*
378 * When the module is reloaded the firmware is still there and
379 * the endpoints are still in the usb core unchanged. This is the
380 * unlinking bug in disguise. Same for the call below.
381 */
382 usb_clear_halt(serial->dev, pipe);
383 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
384 if (ret) {
385 err("%s: Couldn't send command [%d]", serial->type->name, ret);
386 goto no_firmware;
387 } else if (alen != sizeof(command)) {
388 err("%s: Send command incomplete [%d]", serial->type->name, alen);
389 goto no_firmware;
390 }
391
392 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
393 /* See the comment on the usb_clear_halt() above */
394 usb_clear_halt(serial->dev, pipe);
395 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
396 if (ret) {
397 err("%s: Couldn't get results [%d]", serial->type->name, ret);
398 goto no_firmware;
399 } else if (alen != sizeof(result)) {
400 err("%s: Get results incomplete [%d]", serial->type->name, alen);
401 goto no_firmware;
402 } else if (result[0] != command[0]) {
403 err("%s: Command failed [%d]", serial->type->name, result[0]);
404 goto no_firmware;
405 }
406
407 hw_info = (struct whiteheat_hw_info *)&result[1];
408
409 info("%s: Driver %s: Firmware v%d.%02d", serial->type->name,
410 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
411
412 for (i = 0; i < serial->num_ports; i++) {
413 port = serial->port[i];
414
415 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
416 if (info == NULL) {
417 err("%s: Out of memory for port structures\n", serial->type->name);
418 goto no_private;
419 }
420
421 spin_lock_init(&info->lock);
422 info->flags = 0;
423 info->mcr = 0;
424 INIT_WORK(&info->rx_work, rx_data_softint, port);
425
426 INIT_LIST_HEAD(&info->rx_urbs_free);
427 INIT_LIST_HEAD(&info->rx_urbs_submitted);
428 INIT_LIST_HEAD(&info->rx_urb_q);
429 INIT_LIST_HEAD(&info->tx_urbs_free);
430 INIT_LIST_HEAD(&info->tx_urbs_submitted);
431
432 for (j = 0; j < urb_pool_size; j++) {
433 urb = usb_alloc_urb(0, GFP_KERNEL);
434 if (!urb) {
435 err("No free urbs available");
436 goto no_rx_urb;
437 }
438 buf_size = port->read_urb->transfer_buffer_length;
439 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
440 if (!urb->transfer_buffer) {
441 err("Couldn't allocate urb buffer");
442 goto no_rx_buf;
443 }
444 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
445 if (!wrap) {
446 err("Couldn't allocate urb wrapper");
447 goto no_rx_wrap;
448 }
449 usb_fill_bulk_urb(urb, serial->dev,
450 usb_rcvbulkpipe(serial->dev,
451 port->bulk_in_endpointAddress),
452 urb->transfer_buffer, buf_size,
453 whiteheat_read_callback, port);
454 wrap->urb = urb;
455 list_add(&wrap->list, &info->rx_urbs_free);
456
457 urb = usb_alloc_urb(0, GFP_KERNEL);
458 if (!urb) {
459 err("No free urbs available");
460 goto no_tx_urb;
461 }
462 buf_size = port->write_urb->transfer_buffer_length;
463 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
464 if (!urb->transfer_buffer) {
465 err("Couldn't allocate urb buffer");
466 goto no_tx_buf;
467 }
468 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
469 if (!wrap) {
470 err("Couldn't allocate urb wrapper");
471 goto no_tx_wrap;
472 }
473 usb_fill_bulk_urb(urb, serial->dev,
474 usb_sndbulkpipe(serial->dev,
475 port->bulk_out_endpointAddress),
476 urb->transfer_buffer, buf_size,
477 whiteheat_write_callback, port);
478 wrap->urb = urb;
479 list_add(&wrap->list, &info->tx_urbs_free);
480 }
481
482 usb_set_serial_port_data(port, info);
483 }
484
485 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
486 if (command_info == NULL) {
487 err("%s: Out of memory for port structures\n", serial->type->name);
488 goto no_command_private;
489 }
490
491 spin_lock_init(&command_info->lock);
492 command_info->port_running = 0;
493 init_waitqueue_head(&command_info->wait_command);
494 usb_set_serial_port_data(command_port, command_info);
495 command_port->write_urb->complete = command_port_write_callback;
496 command_port->read_urb->complete = command_port_read_callback;
497 kfree(result);
498 kfree(command);
499
500 return 0;
501
502 no_firmware:
503 /* Firmware likely not running */
504 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->name);
505 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->name);
506 err("%s: please contact support@connecttech.com\n", serial->type->name);
507 return -ENODEV;
508
509 no_command_private:
510 for (i = serial->num_ports - 1; i >= 0; i--) {
511 port = serial->port[i];
512 info = usb_get_serial_port_data(port);
513 for (j = urb_pool_size - 1; j >= 0; j--) {
514 tmp = list_first(&info->tx_urbs_free);
515 list_del(tmp);
516 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
517 urb = wrap->urb;
518 kfree(wrap);
519 no_tx_wrap:
520 kfree(urb->transfer_buffer);
521 no_tx_buf:
522 usb_free_urb(urb);
523 no_tx_urb:
524 tmp = list_first(&info->rx_urbs_free);
525 list_del(tmp);
526 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
527 urb = wrap->urb;
528 kfree(wrap);
529 no_rx_wrap:
530 kfree(urb->transfer_buffer);
531 no_rx_buf:
532 usb_free_urb(urb);
533 no_rx_urb:
534 ;
535 }
536 kfree(info);
537 no_private:
538 ;
539 }
540 kfree(result);
541 no_result_buffer:
542 kfree(command);
543 no_command_buffer:
544 return -ENOMEM;
545 }
546
547
548 static void whiteheat_shutdown (struct usb_serial *serial)
549 {
550 struct usb_serial_port *command_port;
551 struct usb_serial_port *port;
552 struct whiteheat_private *info;
553 struct whiteheat_urb_wrap *wrap;
554 struct urb *urb;
555 struct list_head *tmp;
556 struct list_head *tmp2;
557 int i;
558
559 dbg("%s", __FUNCTION__);
560
561 /* free up our private data for our command port */
562 command_port = serial->port[COMMAND_PORT];
563 kfree (usb_get_serial_port_data(command_port));
564
565 for (i = 0; i < serial->num_ports; i++) {
566 port = serial->port[i];
567 info = usb_get_serial_port_data(port);
568 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
569 list_del(tmp);
570 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
571 urb = wrap->urb;
572 kfree(wrap);
573 kfree(urb->transfer_buffer);
574 usb_free_urb(urb);
575 }
576 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
577 list_del(tmp);
578 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
579 urb = wrap->urb;
580 kfree(wrap);
581 kfree(urb->transfer_buffer);
582 usb_free_urb(urb);
583 }
584 kfree(info);
585 }
586
587 return;
588 }
589
590
591 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
592 {
593 int retval = 0;
594 struct termios old_term;
595
596 dbg("%s - port %d", __FUNCTION__, port->number);
597
598 retval = start_command_port(port->serial);
599 if (retval)
600 goto exit;
601
602 if (port->tty)
603 port->tty->low_latency = 1;
604
605 /* send an open port command */
606 retval = firm_open(port);
607 if (retval) {
608 stop_command_port(port->serial);
609 goto exit;
610 }
611
612 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
613 if (retval) {
614 firm_close(port);
615 stop_command_port(port->serial);
616 goto exit;
617 }
618
619 old_term.c_cflag = ~port->tty->termios->c_cflag;
620 old_term.c_iflag = ~port->tty->termios->c_iflag;
621 whiteheat_set_termios(port, &old_term);
622
623 /* Work around HCD bugs */
624 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
625 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
626
627 /* Start reading from the device */
628 retval = start_port_read(port);
629 if (retval) {
630 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
631 firm_close(port);
632 stop_command_port(port->serial);
633 goto exit;
634 }
635
636 exit:
637 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
638 return retval;
639 }
640
641
642 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
643 {
644 struct whiteheat_private *info = usb_get_serial_port_data(port);
645 struct whiteheat_urb_wrap *wrap;
646 struct urb *urb;
647 struct list_head *tmp;
648 struct list_head *tmp2;
649 unsigned long flags;
650
651 dbg("%s - port %d", __FUNCTION__, port->number);
652
653 /* filp is NULL when called from usb_serial_disconnect */
654 if (filp && (tty_hung_up_p(filp))) {
655 return;
656 }
657
658 port->tty->closing = 1;
659
660 /*
661 * Not currently in use; tty_wait_until_sent() calls
662 * serial_chars_in_buffer() which deadlocks on the second semaphore
663 * acquisition. This should be fixed at some point. Greg's been
664 * notified.
665 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
666 tty_wait_until_sent(port->tty, CLOSING_DELAY);
667 }
668 */
669
670 if (port->tty->driver->flush_buffer)
671 port->tty->driver->flush_buffer(port->tty);
672 tty_ldisc_flush(port->tty);
673
674 firm_report_tx_done(port);
675
676 firm_close(port);
677
678 /* shutdown our bulk reads and writes */
679 spin_lock_irqsave(&info->lock, flags);
680 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
681 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
682 urb = wrap->urb;
683 usb_kill_urb(urb);
684 list_del(tmp);
685 list_add(tmp, &info->rx_urbs_free);
686 }
687 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
688 list_del(tmp);
689 list_add(tmp, &info->rx_urbs_free);
690 }
691 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
692 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
693 urb = wrap->urb;
694 usb_kill_urb(urb);
695 list_del(tmp);
696 list_add(tmp, &info->tx_urbs_free);
697 }
698 spin_unlock_irqrestore(&info->lock, flags);
699
700 stop_command_port(port->serial);
701
702 port->tty->closing = 0;
703 }
704
705
706 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
707 {
708 struct usb_serial *serial = port->serial;
709 struct whiteheat_private *info = usb_get_serial_port_data(port);
710 struct whiteheat_urb_wrap *wrap;
711 struct urb *urb;
712 int result;
713 int bytes;
714 int sent = 0;
715 unsigned long flags;
716 struct list_head *tmp;
717
718 dbg("%s - port %d", __FUNCTION__, port->number);
719
720 if (count == 0) {
721 dbg("%s - write request of 0 bytes", __FUNCTION__);
722 return (0);
723 }
724
725 while (count) {
726 spin_lock_irqsave(&info->lock, flags);
727 if (list_empty(&info->tx_urbs_free)) {
728 spin_unlock_irqrestore(&info->lock, flags);
729 break;
730 }
731 tmp = list_first(&info->tx_urbs_free);
732 list_del(tmp);
733 spin_unlock_irqrestore(&info->lock, flags);
734
735 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
736 urb = wrap->urb;
737 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
738 memcpy (urb->transfer_buffer, buf + sent, bytes);
739
740 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
741
742 urb->dev = serial->dev;
743 urb->transfer_buffer_length = bytes;
744 result = usb_submit_urb(urb, GFP_ATOMIC);
745 if (result) {
746 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
747 sent = result;
748 spin_lock_irqsave(&info->lock, flags);
749 list_add(tmp, &info->tx_urbs_free);
750 spin_unlock_irqrestore(&info->lock, flags);
751 break;
752 } else {
753 sent += bytes;
754 count -= bytes;
755 spin_lock_irqsave(&info->lock, flags);
756 list_add(tmp, &info->tx_urbs_submitted);
757 spin_unlock_irqrestore(&info->lock, flags);
758 }
759 }
760
761 return sent;
762 }
763
764
765 static int whiteheat_write_room(struct usb_serial_port *port)
766 {
767 struct whiteheat_private *info = usb_get_serial_port_data(port);
768 struct list_head *tmp;
769 int room = 0;
770 unsigned long flags;
771
772 dbg("%s - port %d", __FUNCTION__, port->number);
773
774 spin_lock_irqsave(&info->lock, flags);
775 list_for_each(tmp, &info->tx_urbs_free)
776 room++;
777 spin_unlock_irqrestore(&info->lock, flags);
778 room *= port->bulk_out_size;
779
780 dbg("%s - returns %d", __FUNCTION__, room);
781 return (room);
782 }
783
784
785 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
786 {
787 struct whiteheat_private *info = usb_get_serial_port_data(port);
788 unsigned int modem_signals = 0;
789
790 dbg("%s - port %d", __FUNCTION__, port->number);
791
792 firm_get_dtr_rts(port);
793 if (info->mcr & UART_MCR_DTR)
794 modem_signals |= TIOCM_DTR;
795 if (info->mcr & UART_MCR_RTS)
796 modem_signals |= TIOCM_RTS;
797
798 return modem_signals;
799 }
800
801
802 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
803 unsigned int set, unsigned int clear)
804 {
805 struct whiteheat_private *info = usb_get_serial_port_data(port);
806
807 dbg("%s - port %d", __FUNCTION__, port->number);
808
809 if (set & TIOCM_RTS)
810 info->mcr |= UART_MCR_RTS;
811 if (set & TIOCM_DTR)
812 info->mcr |= UART_MCR_DTR;
813
814 if (clear & TIOCM_RTS)
815 info->mcr &= ~UART_MCR_RTS;
816 if (clear & TIOCM_DTR)
817 info->mcr &= ~UART_MCR_DTR;
818
819 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
820 firm_set_rts(port, info->mcr & UART_MCR_RTS);
821 return 0;
822 }
823
824
825 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
826 {
827 struct serial_struct serstruct;
828 void __user *user_arg = (void __user *)arg;
829
830 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
831
832 switch (cmd) {
833 case TIOCGSERIAL:
834 memset(&serstruct, 0, sizeof(serstruct));
835 serstruct.type = PORT_16654;
836 serstruct.line = port->serial->minor;
837 serstruct.port = port->number;
838 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
839 serstruct.xmit_fifo_size = port->bulk_out_size;
840 serstruct.custom_divisor = 0;
841 serstruct.baud_base = 460800;
842 serstruct.close_delay = CLOSING_DELAY;
843 serstruct.closing_wait = CLOSING_DELAY;
844
845 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
846 return -EFAULT;
847
848 break;
849
850 case TIOCSSERIAL:
851 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
852 return -EFAULT;
853
854 /*
855 * For now this is ignored. dip sets the ASYNC_[V]HI flags
856 * but this isn't used by us at all. Maybe someone somewhere
857 * will need the custom_divisor setting.
858 */
859
860 break;
861
862 default:
863 break;
864 }
865
866 return -ENOIOCTLCMD;
867 }
868
869
870 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
871 {
872 dbg("%s -port %d", __FUNCTION__, port->number);
873
874 if ((!port->tty) || (!port->tty->termios)) {
875 dbg("%s - no tty structures", __FUNCTION__);
876 goto exit;
877 }
878
879 /* check that they really want us to change something */
880 if (old_termios) {
881 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
882 (port->tty->termios->c_iflag == old_termios->c_iflag)) {
883 dbg("%s - nothing to change...", __FUNCTION__);
884 goto exit;
885 }
886 }
887
888 firm_setup_port(port);
889
890 exit:
891 return;
892 }
893
894
895 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
896 firm_set_break(port, break_state);
897 }
898
899
900 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
901 {
902 struct whiteheat_private *info = usb_get_serial_port_data(port);
903 struct list_head *tmp;
904 struct whiteheat_urb_wrap *wrap;
905 int chars = 0;
906 unsigned long flags;
907
908 dbg("%s - port %d", __FUNCTION__, port->number);
909
910 spin_lock_irqsave(&info->lock, flags);
911 list_for_each(tmp, &info->tx_urbs_submitted) {
912 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
913 chars += wrap->urb->transfer_buffer_length;
914 }
915 spin_unlock_irqrestore(&info->lock, flags);
916
917 dbg ("%s - returns %d", __FUNCTION__, chars);
918 return (chars);
919 }
920
921
922 static void whiteheat_throttle (struct usb_serial_port *port)
923 {
924 struct whiteheat_private *info = usb_get_serial_port_data(port);
925 unsigned long flags;
926
927 dbg("%s - port %d", __FUNCTION__, port->number);
928
929 spin_lock_irqsave(&info->lock, flags);
930 info->flags |= THROTTLED;
931 spin_unlock_irqrestore(&info->lock, flags);
932
933 return;
934 }
935
936
937 static void whiteheat_unthrottle (struct usb_serial_port *port)
938 {
939 struct whiteheat_private *info = usb_get_serial_port_data(port);
940 int actually_throttled;
941 unsigned long flags;
942
943 dbg("%s - port %d", __FUNCTION__, port->number);
944
945 spin_lock_irqsave(&info->lock, flags);
946 actually_throttled = info->flags & ACTUALLY_THROTTLED;
947 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
948 spin_unlock_irqrestore(&info->lock, flags);
949
950 if (actually_throttled)
951 rx_data_softint(port);
952
953 return;
954 }
955
956
957 /*****************************************************************************
958 * Connect Tech's White Heat callback routines
959 *****************************************************************************/
960 static void command_port_write_callback (struct urb *urb, struct pt_regs *regs)
961 {
962 dbg("%s", __FUNCTION__);
963
964 if (urb->status) {
965 dbg ("nonzero urb status: %d", urb->status);
966 return;
967 }
968 }
969
970
971 static void command_port_read_callback (struct urb *urb, struct pt_regs *regs)
972 {
973 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
974 struct whiteheat_command_private *command_info;
975 unsigned char *data = urb->transfer_buffer;
976 int result;
977 unsigned long flags;
978
979 dbg("%s", __FUNCTION__);
980
981 if (urb->status) {
982 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
983 return;
984 }
985
986 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
987
988 command_info = usb_get_serial_port_data(command_port);
989 if (!command_info) {
990 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
991 return;
992 }
993 spin_lock_irqsave(&command_info->lock, flags);
994
995 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
996 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
997 wake_up_interruptible(&command_info->wait_command);
998 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
999 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1000 wake_up_interruptible(&command_info->wait_command);
1001 } else if (data[0] == WHITEHEAT_EVENT) {
1002 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1003 dbg("%s - event received", __FUNCTION__);
1004 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1005 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1006 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1007 wake_up_interruptible(&command_info->wait_command);
1008 } else {
1009 dbg("%s - bad reply from firmware", __FUNCTION__);
1010 }
1011
1012 /* Continue trying to always read */
1013 command_port->read_urb->dev = command_port->serial->dev;
1014 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1015 spin_unlock_irqrestore(&command_info->lock, flags);
1016 if (result)
1017 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1018 }
1019
1020
1021 static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs)
1022 {
1023 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1024 struct whiteheat_urb_wrap *wrap;
1025 unsigned char *data = urb->transfer_buffer;
1026 struct whiteheat_private *info = usb_get_serial_port_data(port);
1027
1028 dbg("%s - port %d", __FUNCTION__, port->number);
1029
1030 spin_lock(&info->lock);
1031 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1032 if (!wrap) {
1033 spin_unlock(&info->lock);
1034 err("%s - Not my urb!", __FUNCTION__);
1035 return;
1036 }
1037 list_del(&wrap->list);
1038 spin_unlock(&info->lock);
1039
1040 if (urb->status) {
1041 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
1042 spin_lock(&info->lock);
1043 list_add(&wrap->list, &info->rx_urbs_free);
1044 spin_unlock(&info->lock);
1045 return;
1046 }
1047
1048 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1049
1050 spin_lock(&info->lock);
1051 list_add_tail(&wrap->list, &info->rx_urb_q);
1052 if (info->flags & THROTTLED) {
1053 info->flags |= ACTUALLY_THROTTLED;
1054 spin_unlock(&info->lock);
1055 return;
1056 }
1057 spin_unlock(&info->lock);
1058
1059 schedule_work(&info->rx_work);
1060 }
1061
1062
1063 static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs)
1064 {
1065 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1066 struct whiteheat_private *info = usb_get_serial_port_data(port);
1067 struct whiteheat_urb_wrap *wrap;
1068
1069 dbg("%s - port %d", __FUNCTION__, port->number);
1070
1071 spin_lock(&info->lock);
1072 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1073 if (!wrap) {
1074 spin_unlock(&info->lock);
1075 err("%s - Not my urb!", __FUNCTION__);
1076 return;
1077 }
1078 list_del(&wrap->list);
1079 list_add(&wrap->list, &info->tx_urbs_free);
1080 spin_unlock(&info->lock);
1081
1082 if (urb->status) {
1083 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1084 return;
1085 }
1086
1087 usb_serial_port_softint((void *)port);
1088
1089 schedule_work(&port->work);
1090 }
1091
1092
1093 /*****************************************************************************
1094 * Connect Tech's White Heat firmware interface
1095 *****************************************************************************/
1096 static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1097 {
1098 struct usb_serial_port *command_port;
1099 struct whiteheat_command_private *command_info;
1100 struct whiteheat_private *info;
1101 __u8 *transfer_buffer;
1102 int retval = 0;
1103 unsigned long flags;
1104
1105 dbg("%s - command %d", __FUNCTION__, command);
1106
1107 command_port = port->serial->port[COMMAND_PORT];
1108 command_info = usb_get_serial_port_data(command_port);
1109 spin_lock_irqsave(&command_info->lock, flags);
1110 command_info->command_finished = FALSE;
1111
1112 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1113 transfer_buffer[0] = command;
1114 memcpy (&transfer_buffer[1], data, datasize);
1115 command_port->write_urb->transfer_buffer_length = datasize + 1;
1116 command_port->write_urb->dev = port->serial->dev;
1117 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
1118 if (retval) {
1119 dbg("%s - submit urb failed", __FUNCTION__);
1120 goto exit;
1121 }
1122 spin_unlock_irqrestore(&command_info->lock, flags);
1123
1124 /* wait for the command to complete */
1125 wait_event_interruptible_timeout(command_info->wait_command,
1126 (command_info->command_finished != FALSE), COMMAND_TIMEOUT);
1127
1128 spin_lock_irqsave(&command_info->lock, flags);
1129
1130 if (command_info->command_finished == FALSE) {
1131 dbg("%s - command timed out.", __FUNCTION__);
1132 retval = -ETIMEDOUT;
1133 goto exit;
1134 }
1135
1136 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1137 dbg("%s - command failed.", __FUNCTION__);
1138 retval = -EIO;
1139 goto exit;
1140 }
1141
1142 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1143 dbg("%s - command completed.", __FUNCTION__);
1144 switch (command) {
1145 case WHITEHEAT_GET_DTR_RTS:
1146 info = usb_get_serial_port_data(port);
1147 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1148 break;
1149 }
1150 }
1151
1152 exit:
1153 spin_unlock_irqrestore(&command_info->lock, flags);
1154 return retval;
1155 }
1156
1157
1158 static int firm_open(struct usb_serial_port *port) {
1159 struct whiteheat_simple open_command;
1160
1161 open_command.port = port->number - port->serial->minor + 1;
1162 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1163 }
1164
1165
1166 static int firm_close(struct usb_serial_port *port) {
1167 struct whiteheat_simple close_command;
1168
1169 close_command.port = port->number - port->serial->minor + 1;
1170 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1171 }
1172
1173
1174 static int firm_setup_port(struct usb_serial_port *port) {
1175 struct whiteheat_port_settings port_settings;
1176 unsigned int cflag = port->tty->termios->c_cflag;
1177
1178 port_settings.port = port->number + 1;
1179
1180 /* get the byte size */
1181 switch (cflag & CSIZE) {
1182 case CS5: port_settings.bits = 5; break;
1183 case CS6: port_settings.bits = 6; break;
1184 case CS7: port_settings.bits = 7; break;
1185 default:
1186 case CS8: port_settings.bits = 8; break;
1187 }
1188 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1189
1190 /* determine the parity */
1191 if (cflag & PARENB)
1192 if (cflag & CMSPAR)
1193 if (cflag & PARODD)
1194 port_settings.parity = WHITEHEAT_PAR_MARK;
1195 else
1196 port_settings.parity = WHITEHEAT_PAR_SPACE;
1197 else
1198 if (cflag & PARODD)
1199 port_settings.parity = WHITEHEAT_PAR_ODD;
1200 else
1201 port_settings.parity = WHITEHEAT_PAR_EVEN;
1202 else
1203 port_settings.parity = WHITEHEAT_PAR_NONE;
1204 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1205
1206 /* figure out the stop bits requested */
1207 if (cflag & CSTOPB)
1208 port_settings.stop = 2;
1209 else
1210 port_settings.stop = 1;
1211 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1212
1213 /* figure out the flow control settings */
1214 if (cflag & CRTSCTS)
1215 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1216 else
1217 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1218 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1219 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1220 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1221 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1222 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1223
1224 /* determine software flow control */
1225 if (I_IXOFF(port->tty))
1226 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1227 else
1228 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1229 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1230
1231 port_settings.xon = START_CHAR(port->tty);
1232 port_settings.xoff = STOP_CHAR(port->tty);
1233 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1234
1235 /* get the baud rate wanted */
1236 port_settings.baud = tty_get_baud_rate(port->tty);
1237 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1238
1239 /* handle any settings that aren't specified in the tty structure */
1240 port_settings.lloop = 0;
1241
1242 /* now send the message to the device */
1243 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1244 }
1245
1246
1247 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1248 struct whiteheat_set_rdb rts_command;
1249
1250 rts_command.port = port->number - port->serial->minor + 1;
1251 rts_command.state = onoff;
1252 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1253 }
1254
1255
1256 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1257 struct whiteheat_set_rdb dtr_command;
1258
1259 dtr_command.port = port->number - port->serial->minor + 1;
1260 dtr_command.state = onoff;
1261 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1262 }
1263
1264
1265 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1266 struct whiteheat_set_rdb break_command;
1267
1268 break_command.port = port->number - port->serial->minor + 1;
1269 break_command.state = onoff;
1270 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1271 }
1272
1273
1274 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1275 struct whiteheat_purge purge_command;
1276
1277 purge_command.port = port->number - port->serial->minor + 1;
1278 purge_command.what = rxtx;
1279 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1280 }
1281
1282
1283 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1284 struct whiteheat_simple get_dr_command;
1285
1286 get_dr_command.port = port->number - port->serial->minor + 1;
1287 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1288 }
1289
1290
1291 static int firm_report_tx_done(struct usb_serial_port *port) {
1292 struct whiteheat_simple close_command;
1293
1294 close_command.port = port->number - port->serial->minor + 1;
1295 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1296 }
1297
1298
1299 /*****************************************************************************
1300 * Connect Tech's White Heat utility functions
1301 *****************************************************************************/
1302 static int start_command_port(struct usb_serial *serial)
1303 {
1304 struct usb_serial_port *command_port;
1305 struct whiteheat_command_private *command_info;
1306 unsigned long flags;
1307 int retval = 0;
1308
1309 command_port = serial->port[COMMAND_PORT];
1310 command_info = usb_get_serial_port_data(command_port);
1311 spin_lock_irqsave(&command_info->lock, flags);
1312 if (!command_info->port_running) {
1313 /* Work around HCD bugs */
1314 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1315
1316 command_port->read_urb->dev = serial->dev;
1317 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1318 if (retval) {
1319 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1320 goto exit;
1321 }
1322 }
1323 command_info->port_running++;
1324
1325 exit:
1326 spin_unlock_irqrestore(&command_info->lock, flags);
1327 return retval;
1328 }
1329
1330
1331 static void stop_command_port(struct usb_serial *serial)
1332 {
1333 struct usb_serial_port *command_port;
1334 struct whiteheat_command_private *command_info;
1335 unsigned long flags;
1336
1337 command_port = serial->port[COMMAND_PORT];
1338 command_info = usb_get_serial_port_data(command_port);
1339 spin_lock_irqsave(&command_info->lock, flags);
1340 command_info->port_running--;
1341 if (!command_info->port_running)
1342 usb_kill_urb(command_port->read_urb);
1343 spin_unlock_irqrestore(&command_info->lock, flags);
1344 }
1345
1346
1347 static int start_port_read(struct usb_serial_port *port)
1348 {
1349 struct whiteheat_private *info = usb_get_serial_port_data(port);
1350 struct whiteheat_urb_wrap *wrap;
1351 struct urb *urb;
1352 int retval = 0;
1353 unsigned long flags;
1354 struct list_head *tmp;
1355 struct list_head *tmp2;
1356
1357 spin_lock_irqsave(&info->lock, flags);
1358
1359 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1360 list_del(tmp);
1361 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1362 urb = wrap->urb;
1363 urb->dev = port->serial->dev;
1364 retval = usb_submit_urb(urb, GFP_KERNEL);
1365 if (retval) {
1366 list_add(tmp, &info->rx_urbs_free);
1367 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1368 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1369 urb = wrap->urb;
1370 usb_kill_urb(urb);
1371 list_del(tmp);
1372 list_add(tmp, &info->rx_urbs_free);
1373 }
1374 break;
1375 }
1376 list_add(tmp, &info->rx_urbs_submitted);
1377 }
1378
1379 spin_unlock_irqrestore(&info->lock, flags);
1380
1381 return retval;
1382 }
1383
1384
1385 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1386 {
1387 struct whiteheat_urb_wrap *wrap;
1388 struct list_head *tmp;
1389
1390 list_for_each(tmp, head) {
1391 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1392 if (wrap->urb == urb)
1393 return wrap;
1394 }
1395
1396 return NULL;
1397 }
1398
1399
1400 static struct list_head *list_first(struct list_head *head)
1401 {
1402 return head->next;
1403 }
1404
1405
1406 static void rx_data_softint(void *private)
1407 {
1408 struct usb_serial_port *port = (struct usb_serial_port *)private;
1409 struct whiteheat_private *info = usb_get_serial_port_data(port);
1410 struct tty_struct *tty = port->tty;
1411 struct whiteheat_urb_wrap *wrap;
1412 struct urb *urb;
1413 unsigned long flags;
1414 struct list_head *tmp;
1415 struct list_head *tmp2;
1416 int result;
1417 int sent = 0;
1418
1419 spin_lock_irqsave(&info->lock, flags);
1420 if (info->flags & THROTTLED) {
1421 spin_unlock_irqrestore(&info->lock, flags);
1422 return;
1423 }
1424
1425 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1426 list_del(tmp);
1427 spin_unlock_irqrestore(&info->lock, flags);
1428
1429 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1430 urb = wrap->urb;
1431
1432 if (tty && urb->actual_length) {
1433 if (urb->actual_length > TTY_FLIPBUF_SIZE - tty->flip.count) {
1434 spin_lock_irqsave(&info->lock, flags);
1435 list_add(tmp, &info->rx_urb_q);
1436 spin_unlock_irqrestore(&info->lock, flags);
1437 tty_flip_buffer_push(tty);
1438 schedule_work(&info->rx_work);
1439 return;
1440 }
1441
1442 memcpy(tty->flip.char_buf_ptr, urb->transfer_buffer, urb->actual_length);
1443 tty->flip.char_buf_ptr += urb->actual_length;
1444 tty->flip.count += urb->actual_length;
1445 sent += urb->actual_length;
1446 }
1447
1448 urb->dev = port->serial->dev;
1449 result = usb_submit_urb(urb, GFP_ATOMIC);
1450 if (result) {
1451 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1452 spin_lock_irqsave(&info->lock, flags);
1453 list_add(tmp, &info->rx_urbs_free);
1454 continue;
1455 }
1456
1457 spin_lock_irqsave(&info->lock, flags);
1458 list_add(tmp, &info->rx_urbs_submitted);
1459 }
1460 spin_unlock_irqrestore(&info->lock, flags);
1461
1462 if (sent)
1463 tty_flip_buffer_push(tty);
1464 }
1465
1466
1467 /*****************************************************************************
1468 * Connect Tech's White Heat module functions
1469 *****************************************************************************/
1470 static int __init whiteheat_init (void)
1471 {
1472 int retval;
1473 retval = usb_serial_register(&whiteheat_fake_device);
1474 if (retval)
1475 goto failed_fake_register;
1476 retval = usb_serial_register(&whiteheat_device);
1477 if (retval)
1478 goto failed_device_register;
1479 retval = usb_register(&whiteheat_driver);
1480 if (retval)
1481 goto failed_usb_register;
1482 info(DRIVER_DESC " " DRIVER_VERSION);
1483 return 0;
1484 failed_usb_register:
1485 usb_serial_deregister(&whiteheat_device);
1486 failed_device_register:
1487 usb_serial_deregister(&whiteheat_fake_device);
1488 failed_fake_register:
1489 return retval;
1490 }
1491
1492
1493 static void __exit whiteheat_exit (void)
1494 {
1495 usb_deregister (&whiteheat_driver);
1496 usb_serial_deregister (&whiteheat_fake_device);
1497 usb_serial_deregister (&whiteheat_device);
1498 }
1499
1500
1501 module_init(whiteheat_init);
1502 module_exit(whiteheat_exit);
1503
1504 MODULE_AUTHOR( DRIVER_AUTHOR );
1505 MODULE_DESCRIPTION( DRIVER_DESC );
1506 MODULE_LICENSE("GPL");
1507
1508 module_param(urb_pool_size, int, 0);
1509 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1510
1511 module_param(debug, bool, S_IRUGO | S_IWUSR);
1512 MODULE_PARM_DESC(debug, "Debug enabled or not");
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