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[PATCH] W1: possible cleanups
[linux-2.6/verdex.git] / drivers / usb / serial / whiteheat.c
blob5b06fa366098c53e0a41aae5e51b3f0e4ac49f4f
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 .name = "whiteheat",
131 .probe = usb_serial_probe,
132 .disconnect = usb_serial_disconnect,
133 .id_table = id_table_combined,
134 .no_dynamic_id = 1,
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_driver whiteheat_fake_device = {
160 .driver = {
161 .owner = THIS_MODULE,
162 .name = "whiteheatnofirm",
163 },
164 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
165 .id_table = id_table_prerenumeration,
166 .num_interrupt_in = NUM_DONT_CARE,
167 .num_bulk_in = NUM_DONT_CARE,
168 .num_bulk_out = NUM_DONT_CARE,
169 .num_ports = 1,
170 .probe = whiteheat_firmware_download,
171 .attach = whiteheat_firmware_attach,
172 };
173
174 static struct usb_serial_driver whiteheat_device = {
175 .driver = {
176 .owner = THIS_MODULE,
177 .name = "whiteheat",
178 },
179 .description = "Connect Tech - WhiteHEAT",
180 .id_table = id_table_std,
181 .num_interrupt_in = NUM_DONT_CARE,
182 .num_bulk_in = NUM_DONT_CARE,
183 .num_bulk_out = NUM_DONT_CARE,
184 .num_ports = 4,
185 .attach = whiteheat_attach,
186 .shutdown = whiteheat_shutdown,
187 .open = whiteheat_open,
188 .close = whiteheat_close,
189 .write = whiteheat_write,
190 .write_room = whiteheat_write_room,
191 .ioctl = whiteheat_ioctl,
192 .set_termios = whiteheat_set_termios,
193 .break_ctl = whiteheat_break_ctl,
194 .tiocmget = whiteheat_tiocmget,
195 .tiocmset = whiteheat_tiocmset,
196 .chars_in_buffer = whiteheat_chars_in_buffer,
197 .throttle = whiteheat_throttle,
198 .unthrottle = whiteheat_unthrottle,
199 .read_bulk_callback = whiteheat_read_callback,
200 .write_bulk_callback = whiteheat_write_callback,
201 };
202
203
204 struct whiteheat_command_private {
205 spinlock_t lock;
206 __u8 port_running;
207 __u8 command_finished;
208 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
209 __u8 result_buffer[64];
210 };
211
212
213 #define THROTTLED 0x01
214 #define ACTUALLY_THROTTLED 0x02
215
216 static int urb_pool_size = 8;
217
218 struct whiteheat_urb_wrap {
219 struct list_head list;
220 struct urb *urb;
221 };
222
223 struct whiteheat_private {
224 spinlock_t lock;
225 __u8 flags;
226 __u8 mcr;
227 struct list_head rx_urbs_free;
228 struct list_head rx_urbs_submitted;
229 struct list_head rx_urb_q;
230 struct work_struct rx_work;
231 struct list_head tx_urbs_free;
232 struct list_head tx_urbs_submitted;
233 };
234
235
236 /* local function prototypes */
237 static int start_command_port(struct usb_serial *serial);
238 static void stop_command_port(struct usb_serial *serial);
239 static void command_port_write_callback(struct urb *urb, struct pt_regs *regs);
240 static void command_port_read_callback(struct urb *urb, struct pt_regs *regs);
241
242 static int start_port_read(struct usb_serial_port *port);
243 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
244 static struct list_head *list_first(struct list_head *head);
245 static void rx_data_softint(void *private);
246
247 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
248 static int firm_open(struct usb_serial_port *port);
249 static int firm_close(struct usb_serial_port *port);
250 static int firm_setup_port(struct usb_serial_port *port);
251 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
252 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
253 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
254 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
255 static int firm_get_dtr_rts(struct usb_serial_port *port);
256 static int firm_report_tx_done(struct usb_serial_port *port);
257
258
259 #define COMMAND_PORT 4
260 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
261 #define COMMAND_TIMEOUT_MS 2000
262 #define CLOSING_DELAY (30 * HZ)
263
264
265 /*****************************************************************************
266 * Connect Tech's White Heat prerenumeration driver functions
267 *****************************************************************************/
268
269 /* steps to download the firmware to the WhiteHEAT device:
270 - hold the reset (by writing to the reset bit of the CPUCS register)
271 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
272 - release the reset (by writing to the CPUCS register)
273 - download the WH.HEX file for all addresses greater than 0x1b3f using
274 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
275 - hold the reset
276 - download the WH.HEX file for all addresses less than 0x1b40 using
277 VENDOR_REQUEST_ANCHOR_LOAD
278 - release the reset
279 - device renumerated itself and comes up as new device id with all
280 firmware download completed.
281 */
282 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
283 {
284 int response;
285 const struct whiteheat_hex_record *record;
286
287 dbg("%s", __FUNCTION__);
288
289 response = ezusb_set_reset (serial, 1);
290
291 record = &whiteheat_loader[0];
292 while (record->address != 0xffff) {
293 response = ezusb_writememory (serial, record->address,
294 (unsigned char *)record->data, record->data_size, 0xa0);
295 if (response < 0) {
296 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
297 __FUNCTION__, response, record->address, record->data, record->data_size);
298 break;
299 }
300 ++record;
301 }
302
303 response = ezusb_set_reset (serial, 0);
304
305 record = &whiteheat_firmware[0];
306 while (record->address < 0x1b40) {
307 ++record;
308 }
309 while (record->address != 0xffff) {
310 response = ezusb_writememory (serial, record->address,
311 (unsigned char *)record->data, record->data_size, 0xa3);
312 if (response < 0) {
313 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
314 __FUNCTION__, response, record->address, record->data, record->data_size);
315 break;
316 }
317 ++record;
318 }
319
320 response = ezusb_set_reset (serial, 1);
321
322 record = &whiteheat_firmware[0];
323 while (record->address < 0x1b40) {
324 response = ezusb_writememory (serial, record->address,
325 (unsigned char *)record->data, record->data_size, 0xa0);
326 if (response < 0) {
327 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
328 __FUNCTION__, response, record->address, record->data, record->data_size);
329 break;
330 }
331 ++record;
332 }
333
334 response = ezusb_set_reset (serial, 0);
335
336 return 0;
337 }
338
339
340 static int whiteheat_firmware_attach (struct usb_serial *serial)
341 {
342 /* We want this device to fail to have a driver assigned to it */
343 return 1;
344 }
345
346
347 /*****************************************************************************
348 * Connect Tech's White Heat serial driver functions
349 *****************************************************************************/
350 static int whiteheat_attach (struct usb_serial *serial)
351 {
352 struct usb_serial_port *command_port;
353 struct whiteheat_command_private *command_info;
354 struct usb_serial_port *port;
355 struct whiteheat_private *info;
356 struct whiteheat_hw_info *hw_info;
357 int pipe;
358 int ret;
359 int alen;
360 __u8 *command;
361 __u8 *result;
362 int i;
363 int j;
364 struct urb *urb;
365 int buf_size;
366 struct whiteheat_urb_wrap *wrap;
367 struct list_head *tmp;
368
369 command_port = serial->port[COMMAND_PORT];
370
371 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
372 command = kmalloc(2, GFP_KERNEL);
373 if (!command)
374 goto no_command_buffer;
375 command[0] = WHITEHEAT_GET_HW_INFO;
376 command[1] = 0;
377
378 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
379 if (!result)
380 goto no_result_buffer;
381 /*
382 * When the module is reloaded the firmware is still there and
383 * the endpoints are still in the usb core unchanged. This is the
384 * unlinking bug in disguise. Same for the call below.
385 */
386 usb_clear_halt(serial->dev, pipe);
387 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
388 if (ret) {
389 err("%s: Couldn't send command [%d]", serial->type->description, ret);
390 goto no_firmware;
391 } else if (alen != 2) {
392 err("%s: Send command incomplete [%d]", serial->type->description, alen);
393 goto no_firmware;
394 }
395
396 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
397 /* See the comment on the usb_clear_halt() above */
398 usb_clear_halt(serial->dev, pipe);
399 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
400 if (ret) {
401 err("%s: Couldn't get results [%d]", serial->type->description, ret);
402 goto no_firmware;
403 } else if (alen != sizeof(*hw_info) + 1) {
404 err("%s: Get results incomplete [%d]", serial->type->description, alen);
405 goto no_firmware;
406 } else if (result[0] != command[0]) {
407 err("%s: Command failed [%d]", serial->type->description, result[0]);
408 goto no_firmware;
409 }
410
411 hw_info = (struct whiteheat_hw_info *)&result[1];
412
413 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
414 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
415
416 for (i = 0; i < serial->num_ports; i++) {
417 port = serial->port[i];
418
419 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
420 if (info == NULL) {
421 err("%s: Out of memory for port structures\n", serial->type->description);
422 goto no_private;
423 }
424
425 spin_lock_init(&info->lock);
426 info->flags = 0;
427 info->mcr = 0;
428 INIT_WORK(&info->rx_work, rx_data_softint, port);
429
430 INIT_LIST_HEAD(&info->rx_urbs_free);
431 INIT_LIST_HEAD(&info->rx_urbs_submitted);
432 INIT_LIST_HEAD(&info->rx_urb_q);
433 INIT_LIST_HEAD(&info->tx_urbs_free);
434 INIT_LIST_HEAD(&info->tx_urbs_submitted);
435
436 for (j = 0; j < urb_pool_size; j++) {
437 urb = usb_alloc_urb(0, GFP_KERNEL);
438 if (!urb) {
439 err("No free urbs available");
440 goto no_rx_urb;
441 }
442 buf_size = port->read_urb->transfer_buffer_length;
443 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
444 if (!urb->transfer_buffer) {
445 err("Couldn't allocate urb buffer");
446 goto no_rx_buf;
447 }
448 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
449 if (!wrap) {
450 err("Couldn't allocate urb wrapper");
451 goto no_rx_wrap;
452 }
453 usb_fill_bulk_urb(urb, serial->dev,
454 usb_rcvbulkpipe(serial->dev,
455 port->bulk_in_endpointAddress),
456 urb->transfer_buffer, buf_size,
457 whiteheat_read_callback, port);
458 wrap->urb = urb;
459 list_add(&wrap->list, &info->rx_urbs_free);
460
461 urb = usb_alloc_urb(0, GFP_KERNEL);
462 if (!urb) {
463 err("No free urbs available");
464 goto no_tx_urb;
465 }
466 buf_size = port->write_urb->transfer_buffer_length;
467 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
468 if (!urb->transfer_buffer) {
469 err("Couldn't allocate urb buffer");
470 goto no_tx_buf;
471 }
472 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
473 if (!wrap) {
474 err("Couldn't allocate urb wrapper");
475 goto no_tx_wrap;
476 }
477 usb_fill_bulk_urb(urb, serial->dev,
478 usb_sndbulkpipe(serial->dev,
479 port->bulk_out_endpointAddress),
480 urb->transfer_buffer, buf_size,
481 whiteheat_write_callback, port);
482 wrap->urb = urb;
483 list_add(&wrap->list, &info->tx_urbs_free);
484 }
485
486 usb_set_serial_port_data(port, info);
487 }
488
489 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
490 if (command_info == NULL) {
491 err("%s: Out of memory for port structures\n", serial->type->description);
492 goto no_command_private;
493 }
494
495 spin_lock_init(&command_info->lock);
496 command_info->port_running = 0;
497 init_waitqueue_head(&command_info->wait_command);
498 usb_set_serial_port_data(command_port, command_info);
499 command_port->write_urb->complete = command_port_write_callback;
500 command_port->read_urb->complete = command_port_read_callback;
501 kfree(result);
502 kfree(command);
503
504 return 0;
505
506 no_firmware:
507 /* Firmware likely not running */
508 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
509 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
510 err("%s: please contact support@connecttech.com\n", serial->type->description);
511 kfree(result);
512 return -ENODEV;
513
514 no_command_private:
515 for (i = serial->num_ports - 1; i >= 0; i--) {
516 port = serial->port[i];
517 info = usb_get_serial_port_data(port);
518 for (j = urb_pool_size - 1; j >= 0; j--) {
519 tmp = list_first(&info->tx_urbs_free);
520 list_del(tmp);
521 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
522 urb = wrap->urb;
523 kfree(wrap);
524 no_tx_wrap:
525 kfree(urb->transfer_buffer);
526 no_tx_buf:
527 usb_free_urb(urb);
528 no_tx_urb:
529 tmp = list_first(&info->rx_urbs_free);
530 list_del(tmp);
531 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
532 urb = wrap->urb;
533 kfree(wrap);
534 no_rx_wrap:
535 kfree(urb->transfer_buffer);
536 no_rx_buf:
537 usb_free_urb(urb);
538 no_rx_urb:
539 ;
540 }
541 kfree(info);
542 no_private:
543 ;
544 }
545 kfree(result);
546 no_result_buffer:
547 kfree(command);
548 no_command_buffer:
549 return -ENOMEM;
550 }
551
552
553 static void whiteheat_shutdown (struct usb_serial *serial)
554 {
555 struct usb_serial_port *command_port;
556 struct usb_serial_port *port;
557 struct whiteheat_private *info;
558 struct whiteheat_urb_wrap *wrap;
559 struct urb *urb;
560 struct list_head *tmp;
561 struct list_head *tmp2;
562 int i;
563
564 dbg("%s", __FUNCTION__);
565
566 /* free up our private data for our command port */
567 command_port = serial->port[COMMAND_PORT];
568 kfree (usb_get_serial_port_data(command_port));
569
570 for (i = 0; i < serial->num_ports; i++) {
571 port = serial->port[i];
572 info = usb_get_serial_port_data(port);
573 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
574 list_del(tmp);
575 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
576 urb = wrap->urb;
577 kfree(wrap);
578 kfree(urb->transfer_buffer);
579 usb_free_urb(urb);
580 }
581 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
582 list_del(tmp);
583 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
584 urb = wrap->urb;
585 kfree(wrap);
586 kfree(urb->transfer_buffer);
587 usb_free_urb(urb);
588 }
589 kfree(info);
590 }
591
592 return;
593 }
594
595
596 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
597 {
598 int retval = 0;
599 struct termios old_term;
600
601 dbg("%s - port %d", __FUNCTION__, port->number);
602
603 retval = start_command_port(port->serial);
604 if (retval)
605 goto exit;
606
607 if (port->tty)
608 port->tty->low_latency = 1;
609
610 /* send an open port command */
611 retval = firm_open(port);
612 if (retval) {
613 stop_command_port(port->serial);
614 goto exit;
615 }
616
617 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
618 if (retval) {
619 firm_close(port);
620 stop_command_port(port->serial);
621 goto exit;
622 }
623
624 old_term.c_cflag = ~port->tty->termios->c_cflag;
625 old_term.c_iflag = ~port->tty->termios->c_iflag;
626 whiteheat_set_termios(port, &old_term);
627
628 /* Work around HCD bugs */
629 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
630 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
631
632 /* Start reading from the device */
633 retval = start_port_read(port);
634 if (retval) {
635 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
636 firm_close(port);
637 stop_command_port(port->serial);
638 goto exit;
639 }
640
641 exit:
642 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
643 return retval;
644 }
645
646
647 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
648 {
649 struct whiteheat_private *info = usb_get_serial_port_data(port);
650 struct whiteheat_urb_wrap *wrap;
651 struct urb *urb;
652 struct list_head *tmp;
653 struct list_head *tmp2;
654 unsigned long flags;
655
656 dbg("%s - port %d", __FUNCTION__, port->number);
657
658 /* filp is NULL when called from usb_serial_disconnect */
659 if (filp && (tty_hung_up_p(filp))) {
660 return;
661 }
662
663 port->tty->closing = 1;
664
665 /*
666 * Not currently in use; tty_wait_until_sent() calls
667 * serial_chars_in_buffer() which deadlocks on the second semaphore
668 * acquisition. This should be fixed at some point. Greg's been
669 * notified.
670 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
671 tty_wait_until_sent(port->tty, CLOSING_DELAY);
672 }
673 */
674
675 if (port->tty->driver->flush_buffer)
676 port->tty->driver->flush_buffer(port->tty);
677 tty_ldisc_flush(port->tty);
678
679 firm_report_tx_done(port);
680
681 firm_close(port);
682
683 /* shutdown our bulk reads and writes */
684 spin_lock_irqsave(&info->lock, flags);
685 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
686 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
687 urb = wrap->urb;
688 usb_kill_urb(urb);
689 list_del(tmp);
690 list_add(tmp, &info->rx_urbs_free);
691 }
692 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
693 list_del(tmp);
694 list_add(tmp, &info->rx_urbs_free);
695 }
696 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
697 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
698 urb = wrap->urb;
699 usb_kill_urb(urb);
700 list_del(tmp);
701 list_add(tmp, &info->tx_urbs_free);
702 }
703 spin_unlock_irqrestore(&info->lock, flags);
704
705 stop_command_port(port->serial);
706
707 port->tty->closing = 0;
708 }
709
710
711 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
712 {
713 struct usb_serial *serial = port->serial;
714 struct whiteheat_private *info = usb_get_serial_port_data(port);
715 struct whiteheat_urb_wrap *wrap;
716 struct urb *urb;
717 int result;
718 int bytes;
719 int sent = 0;
720 unsigned long flags;
721 struct list_head *tmp;
722
723 dbg("%s - port %d", __FUNCTION__, port->number);
724
725 if (count == 0) {
726 dbg("%s - write request of 0 bytes", __FUNCTION__);
727 return (0);
728 }
729
730 while (count) {
731 spin_lock_irqsave(&info->lock, flags);
732 if (list_empty(&info->tx_urbs_free)) {
733 spin_unlock_irqrestore(&info->lock, flags);
734 break;
735 }
736 tmp = list_first(&info->tx_urbs_free);
737 list_del(tmp);
738 spin_unlock_irqrestore(&info->lock, flags);
739
740 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
741 urb = wrap->urb;
742 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
743 memcpy (urb->transfer_buffer, buf + sent, bytes);
744
745 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
746
747 urb->dev = serial->dev;
748 urb->transfer_buffer_length = bytes;
749 result = usb_submit_urb(urb, GFP_ATOMIC);
750 if (result) {
751 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
752 sent = result;
753 spin_lock_irqsave(&info->lock, flags);
754 list_add(tmp, &info->tx_urbs_free);
755 spin_unlock_irqrestore(&info->lock, flags);
756 break;
757 } else {
758 sent += bytes;
759 count -= bytes;
760 spin_lock_irqsave(&info->lock, flags);
761 list_add(tmp, &info->tx_urbs_submitted);
762 spin_unlock_irqrestore(&info->lock, flags);
763 }
764 }
765
766 return sent;
767 }
768
769
770 static int whiteheat_write_room(struct usb_serial_port *port)
771 {
772 struct whiteheat_private *info = usb_get_serial_port_data(port);
773 struct list_head *tmp;
774 int room = 0;
775 unsigned long flags;
776
777 dbg("%s - port %d", __FUNCTION__, port->number);
778
779 spin_lock_irqsave(&info->lock, flags);
780 list_for_each(tmp, &info->tx_urbs_free)
781 room++;
782 spin_unlock_irqrestore(&info->lock, flags);
783 room *= port->bulk_out_size;
784
785 dbg("%s - returns %d", __FUNCTION__, room);
786 return (room);
787 }
788
789
790 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
791 {
792 struct whiteheat_private *info = usb_get_serial_port_data(port);
793 unsigned int modem_signals = 0;
794
795 dbg("%s - port %d", __FUNCTION__, port->number);
796
797 firm_get_dtr_rts(port);
798 if (info->mcr & UART_MCR_DTR)
799 modem_signals |= TIOCM_DTR;
800 if (info->mcr & UART_MCR_RTS)
801 modem_signals |= TIOCM_RTS;
802
803 return modem_signals;
804 }
805
806
807 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
808 unsigned int set, unsigned int clear)
809 {
810 struct whiteheat_private *info = usb_get_serial_port_data(port);
811
812 dbg("%s - port %d", __FUNCTION__, port->number);
813
814 if (set & TIOCM_RTS)
815 info->mcr |= UART_MCR_RTS;
816 if (set & TIOCM_DTR)
817 info->mcr |= UART_MCR_DTR;
818
819 if (clear & TIOCM_RTS)
820 info->mcr &= ~UART_MCR_RTS;
821 if (clear & TIOCM_DTR)
822 info->mcr &= ~UART_MCR_DTR;
823
824 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
825 firm_set_rts(port, info->mcr & UART_MCR_RTS);
826 return 0;
827 }
828
829
830 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
831 {
832 struct serial_struct serstruct;
833 void __user *user_arg = (void __user *)arg;
834
835 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
836
837 switch (cmd) {
838 case TIOCGSERIAL:
839 memset(&serstruct, 0, sizeof(serstruct));
840 serstruct.type = PORT_16654;
841 serstruct.line = port->serial->minor;
842 serstruct.port = port->number;
843 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
844 serstruct.xmit_fifo_size = port->bulk_out_size;
845 serstruct.custom_divisor = 0;
846 serstruct.baud_base = 460800;
847 serstruct.close_delay = CLOSING_DELAY;
848 serstruct.closing_wait = CLOSING_DELAY;
849
850 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
851 return -EFAULT;
852
853 break;
854
855 case TIOCSSERIAL:
856 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
857 return -EFAULT;
858
859 /*
860 * For now this is ignored. dip sets the ASYNC_[V]HI flags
861 * but this isn't used by us at all. Maybe someone somewhere
862 * will need the custom_divisor setting.
863 */
864
865 break;
866
867 default:
868 break;
869 }
870
871 return -ENOIOCTLCMD;
872 }
873
874
875 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
876 {
877 dbg("%s -port %d", __FUNCTION__, port->number);
878
879 if ((!port->tty) || (!port->tty->termios)) {
880 dbg("%s - no tty structures", __FUNCTION__);
881 goto exit;
882 }
883
884 /* check that they really want us to change something */
885 if (old_termios) {
886 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
887 (port->tty->termios->c_iflag == old_termios->c_iflag)) {
888 dbg("%s - nothing to change...", __FUNCTION__);
889 goto exit;
890 }
891 }
892
893 firm_setup_port(port);
894
895 exit:
896 return;
897 }
898
899
900 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
901 firm_set_break(port, break_state);
902 }
903
904
905 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
906 {
907 struct whiteheat_private *info = usb_get_serial_port_data(port);
908 struct list_head *tmp;
909 struct whiteheat_urb_wrap *wrap;
910 int chars = 0;
911 unsigned long flags;
912
913 dbg("%s - port %d", __FUNCTION__, port->number);
914
915 spin_lock_irqsave(&info->lock, flags);
916 list_for_each(tmp, &info->tx_urbs_submitted) {
917 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
918 chars += wrap->urb->transfer_buffer_length;
919 }
920 spin_unlock_irqrestore(&info->lock, flags);
921
922 dbg ("%s - returns %d", __FUNCTION__, chars);
923 return (chars);
924 }
925
926
927 static void whiteheat_throttle (struct usb_serial_port *port)
928 {
929 struct whiteheat_private *info = usb_get_serial_port_data(port);
930 unsigned long flags;
931
932 dbg("%s - port %d", __FUNCTION__, port->number);
933
934 spin_lock_irqsave(&info->lock, flags);
935 info->flags |= THROTTLED;
936 spin_unlock_irqrestore(&info->lock, flags);
937
938 return;
939 }
940
941
942 static void whiteheat_unthrottle (struct usb_serial_port *port)
943 {
944 struct whiteheat_private *info = usb_get_serial_port_data(port);
945 int actually_throttled;
946 unsigned long flags;
947
948 dbg("%s - port %d", __FUNCTION__, port->number);
949
950 spin_lock_irqsave(&info->lock, flags);
951 actually_throttled = info->flags & ACTUALLY_THROTTLED;
952 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
953 spin_unlock_irqrestore(&info->lock, flags);
954
955 if (actually_throttled)
956 rx_data_softint(port);
957
958 return;
959 }
960
961
962 /*****************************************************************************
963 * Connect Tech's White Heat callback routines
964 *****************************************************************************/
965 static void command_port_write_callback (struct urb *urb, struct pt_regs *regs)
966 {
967 dbg("%s", __FUNCTION__);
968
969 if (urb->status) {
970 dbg ("nonzero urb status: %d", urb->status);
971 return;
972 }
973 }
974
975
976 static void command_port_read_callback (struct urb *urb, struct pt_regs *regs)
977 {
978 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
979 struct whiteheat_command_private *command_info;
980 unsigned char *data = urb->transfer_buffer;
981 int result;
982 unsigned long flags;
983
984 dbg("%s", __FUNCTION__);
985
986 if (urb->status) {
987 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
988 return;
989 }
990
991 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
992
993 command_info = usb_get_serial_port_data(command_port);
994 if (!command_info) {
995 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
996 return;
997 }
998 spin_lock_irqsave(&command_info->lock, flags);
999
1000 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1001 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1002 wake_up_interruptible(&command_info->wait_command);
1003 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1004 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1005 wake_up_interruptible(&command_info->wait_command);
1006 } else if (data[0] == WHITEHEAT_EVENT) {
1007 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1008 dbg("%s - event received", __FUNCTION__);
1009 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1010 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1011 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1012 wake_up_interruptible(&command_info->wait_command);
1013 } else {
1014 dbg("%s - bad reply from firmware", __FUNCTION__);
1015 }
1016
1017 /* Continue trying to always read */
1018 command_port->read_urb->dev = command_port->serial->dev;
1019 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1020 spin_unlock_irqrestore(&command_info->lock, flags);
1021 if (result)
1022 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1023 }
1024
1025
1026 static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs)
1027 {
1028 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1029 struct whiteheat_urb_wrap *wrap;
1030 unsigned char *data = urb->transfer_buffer;
1031 struct whiteheat_private *info = usb_get_serial_port_data(port);
1032
1033 dbg("%s - port %d", __FUNCTION__, port->number);
1034
1035 spin_lock(&info->lock);
1036 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1037 if (!wrap) {
1038 spin_unlock(&info->lock);
1039 err("%s - Not my urb!", __FUNCTION__);
1040 return;
1041 }
1042 list_del(&wrap->list);
1043 spin_unlock(&info->lock);
1044
1045 if (urb->status) {
1046 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
1047 spin_lock(&info->lock);
1048 list_add(&wrap->list, &info->rx_urbs_free);
1049 spin_unlock(&info->lock);
1050 return;
1051 }
1052
1053 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1054
1055 spin_lock(&info->lock);
1056 list_add_tail(&wrap->list, &info->rx_urb_q);
1057 if (info->flags & THROTTLED) {
1058 info->flags |= ACTUALLY_THROTTLED;
1059 spin_unlock(&info->lock);
1060 return;
1061 }
1062 spin_unlock(&info->lock);
1063
1064 schedule_work(&info->rx_work);
1065 }
1066
1067
1068 static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs)
1069 {
1070 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1071 struct whiteheat_private *info = usb_get_serial_port_data(port);
1072 struct whiteheat_urb_wrap *wrap;
1073
1074 dbg("%s - port %d", __FUNCTION__, port->number);
1075
1076 spin_lock(&info->lock);
1077 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1078 if (!wrap) {
1079 spin_unlock(&info->lock);
1080 err("%s - Not my urb!", __FUNCTION__);
1081 return;
1082 }
1083 list_del(&wrap->list);
1084 list_add(&wrap->list, &info->tx_urbs_free);
1085 spin_unlock(&info->lock);
1086
1087 if (urb->status) {
1088 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1089 return;
1090 }
1091
1092 usb_serial_port_softint(port);
1093 }
1094
1095
1096 /*****************************************************************************
1097 * Connect Tech's White Heat firmware interface
1098 *****************************************************************************/
1099 static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1100 {
1101 struct usb_serial_port *command_port;
1102 struct whiteheat_command_private *command_info;
1103 struct whiteheat_private *info;
1104 __u8 *transfer_buffer;
1105 int retval = 0;
1106 unsigned long flags;
1107
1108 dbg("%s - command %d", __FUNCTION__, command);
1109
1110 command_port = port->serial->port[COMMAND_PORT];
1111 command_info = usb_get_serial_port_data(command_port);
1112 spin_lock_irqsave(&command_info->lock, flags);
1113 command_info->command_finished = FALSE;
1114
1115 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1116 transfer_buffer[0] = command;
1117 memcpy (&transfer_buffer[1], data, datasize);
1118 command_port->write_urb->transfer_buffer_length = datasize + 1;
1119 command_port->write_urb->dev = port->serial->dev;
1120 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
1121 if (retval) {
1122 dbg("%s - submit urb failed", __FUNCTION__);
1123 goto exit;
1124 }
1125 spin_unlock_irqrestore(&command_info->lock, flags);
1126
1127 /* wait for the command to complete */
1128 wait_event_interruptible_timeout(command_info->wait_command,
1129 (command_info->command_finished != FALSE), COMMAND_TIMEOUT);
1130
1131 spin_lock_irqsave(&command_info->lock, flags);
1132
1133 if (command_info->command_finished == FALSE) {
1134 dbg("%s - command timed out.", __FUNCTION__);
1135 retval = -ETIMEDOUT;
1136 goto exit;
1137 }
1138
1139 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1140 dbg("%s - command failed.", __FUNCTION__);
1141 retval = -EIO;
1142 goto exit;
1143 }
1144
1145 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1146 dbg("%s - command completed.", __FUNCTION__);
1147 switch (command) {
1148 case WHITEHEAT_GET_DTR_RTS:
1149 info = usb_get_serial_port_data(port);
1150 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1151 break;
1152 }
1153 }
1154
1155 exit:
1156 spin_unlock_irqrestore(&command_info->lock, flags);
1157 return retval;
1158 }
1159
1160
1161 static int firm_open(struct usb_serial_port *port) {
1162 struct whiteheat_simple open_command;
1163
1164 open_command.port = port->number - port->serial->minor + 1;
1165 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1166 }
1167
1168
1169 static int firm_close(struct usb_serial_port *port) {
1170 struct whiteheat_simple close_command;
1171
1172 close_command.port = port->number - port->serial->minor + 1;
1173 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1174 }
1175
1176
1177 static int firm_setup_port(struct usb_serial_port *port) {
1178 struct whiteheat_port_settings port_settings;
1179 unsigned int cflag = port->tty->termios->c_cflag;
1180
1181 port_settings.port = port->number + 1;
1182
1183 /* get the byte size */
1184 switch (cflag & CSIZE) {
1185 case CS5: port_settings.bits = 5; break;
1186 case CS6: port_settings.bits = 6; break;
1187 case CS7: port_settings.bits = 7; break;
1188 default:
1189 case CS8: port_settings.bits = 8; break;
1190 }
1191 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1192
1193 /* determine the parity */
1194 if (cflag & PARENB)
1195 if (cflag & CMSPAR)
1196 if (cflag & PARODD)
1197 port_settings.parity = WHITEHEAT_PAR_MARK;
1198 else
1199 port_settings.parity = WHITEHEAT_PAR_SPACE;
1200 else
1201 if (cflag & PARODD)
1202 port_settings.parity = WHITEHEAT_PAR_ODD;
1203 else
1204 port_settings.parity = WHITEHEAT_PAR_EVEN;
1205 else
1206 port_settings.parity = WHITEHEAT_PAR_NONE;
1207 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1208
1209 /* figure out the stop bits requested */
1210 if (cflag & CSTOPB)
1211 port_settings.stop = 2;
1212 else
1213 port_settings.stop = 1;
1214 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1215
1216 /* figure out the flow control settings */
1217 if (cflag & CRTSCTS)
1218 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1219 else
1220 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1221 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1222 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1223 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1224 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1225 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1226
1227 /* determine software flow control */
1228 if (I_IXOFF(port->tty))
1229 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1230 else
1231 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1232 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1233
1234 port_settings.xon = START_CHAR(port->tty);
1235 port_settings.xoff = STOP_CHAR(port->tty);
1236 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1237
1238 /* get the baud rate wanted */
1239 port_settings.baud = tty_get_baud_rate(port->tty);
1240 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1241
1242 /* handle any settings that aren't specified in the tty structure */
1243 port_settings.lloop = 0;
1244
1245 /* now send the message to the device */
1246 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1247 }
1248
1249
1250 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1251 struct whiteheat_set_rdb rts_command;
1252
1253 rts_command.port = port->number - port->serial->minor + 1;
1254 rts_command.state = onoff;
1255 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1256 }
1257
1258
1259 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1260 struct whiteheat_set_rdb dtr_command;
1261
1262 dtr_command.port = port->number - port->serial->minor + 1;
1263 dtr_command.state = onoff;
1264 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1265 }
1266
1267
1268 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1269 struct whiteheat_set_rdb break_command;
1270
1271 break_command.port = port->number - port->serial->minor + 1;
1272 break_command.state = onoff;
1273 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1274 }
1275
1276
1277 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1278 struct whiteheat_purge purge_command;
1279
1280 purge_command.port = port->number - port->serial->minor + 1;
1281 purge_command.what = rxtx;
1282 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1283 }
1284
1285
1286 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1287 struct whiteheat_simple get_dr_command;
1288
1289 get_dr_command.port = port->number - port->serial->minor + 1;
1290 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1291 }
1292
1293
1294 static int firm_report_tx_done(struct usb_serial_port *port) {
1295 struct whiteheat_simple close_command;
1296
1297 close_command.port = port->number - port->serial->minor + 1;
1298 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1299 }
1300
1301
1302 /*****************************************************************************
1303 * Connect Tech's White Heat utility functions
1304 *****************************************************************************/
1305 static int start_command_port(struct usb_serial *serial)
1306 {
1307 struct usb_serial_port *command_port;
1308 struct whiteheat_command_private *command_info;
1309 unsigned long flags;
1310 int retval = 0;
1311
1312 command_port = serial->port[COMMAND_PORT];
1313 command_info = usb_get_serial_port_data(command_port);
1314 spin_lock_irqsave(&command_info->lock, flags);
1315 if (!command_info->port_running) {
1316 /* Work around HCD bugs */
1317 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1318
1319 command_port->read_urb->dev = serial->dev;
1320 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1321 if (retval) {
1322 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1323 goto exit;
1324 }
1325 }
1326 command_info->port_running++;
1327
1328 exit:
1329 spin_unlock_irqrestore(&command_info->lock, flags);
1330 return retval;
1331 }
1332
1333
1334 static void stop_command_port(struct usb_serial *serial)
1335 {
1336 struct usb_serial_port *command_port;
1337 struct whiteheat_command_private *command_info;
1338 unsigned long flags;
1339
1340 command_port = serial->port[COMMAND_PORT];
1341 command_info = usb_get_serial_port_data(command_port);
1342 spin_lock_irqsave(&command_info->lock, flags);
1343 command_info->port_running--;
1344 if (!command_info->port_running)
1345 usb_kill_urb(command_port->read_urb);
1346 spin_unlock_irqrestore(&command_info->lock, flags);
1347 }
1348
1349
1350 static int start_port_read(struct usb_serial_port *port)
1351 {
1352 struct whiteheat_private *info = usb_get_serial_port_data(port);
1353 struct whiteheat_urb_wrap *wrap;
1354 struct urb *urb;
1355 int retval = 0;
1356 unsigned long flags;
1357 struct list_head *tmp;
1358 struct list_head *tmp2;
1359
1360 spin_lock_irqsave(&info->lock, flags);
1361
1362 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1363 list_del(tmp);
1364 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1365 urb = wrap->urb;
1366 urb->dev = port->serial->dev;
1367 retval = usb_submit_urb(urb, GFP_KERNEL);
1368 if (retval) {
1369 list_add(tmp, &info->rx_urbs_free);
1370 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1371 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1372 urb = wrap->urb;
1373 usb_kill_urb(urb);
1374 list_del(tmp);
1375 list_add(tmp, &info->rx_urbs_free);
1376 }
1377 break;
1378 }
1379 list_add(tmp, &info->rx_urbs_submitted);
1380 }
1381
1382 spin_unlock_irqrestore(&info->lock, flags);
1383
1384 return retval;
1385 }
1386
1387
1388 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1389 {
1390 struct whiteheat_urb_wrap *wrap;
1391 struct list_head *tmp;
1392
1393 list_for_each(tmp, head) {
1394 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1395 if (wrap->urb == urb)
1396 return wrap;
1397 }
1398
1399 return NULL;
1400 }
1401
1402
1403 static struct list_head *list_first(struct list_head *head)
1404 {
1405 return head->next;
1406 }
1407
1408
1409 static void rx_data_softint(void *private)
1410 {
1411 struct usb_serial_port *port = (struct usb_serial_port *)private;
1412 struct whiteheat_private *info = usb_get_serial_port_data(port);
1413 struct tty_struct *tty = port->tty;
1414 struct whiteheat_urb_wrap *wrap;
1415 struct urb *urb;
1416 unsigned long flags;
1417 struct list_head *tmp;
1418 struct list_head *tmp2;
1419 int result;
1420 int sent = 0;
1421
1422 spin_lock_irqsave(&info->lock, flags);
1423 if (info->flags & THROTTLED) {
1424 spin_unlock_irqrestore(&info->lock, flags);
1425 return;
1426 }
1427
1428 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1429 list_del(tmp);
1430 spin_unlock_irqrestore(&info->lock, flags);
1431
1432 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1433 urb = wrap->urb;
1434
1435 if (tty && urb->actual_length) {
1436 int len = tty_buffer_request_room(tty, urb->actual_length);
1437 /* This stuff can go away now I suspect */
1438 if (unlikely(len < urb->actual_length)) {
1439 spin_lock_irqsave(&info->lock, flags);
1440 list_add(tmp, &info->rx_urb_q);
1441 spin_unlock_irqrestore(&info->lock, flags);
1442 tty_flip_buffer_push(tty);
1443 schedule_work(&info->rx_work);
1444 return;
1445 }
1446 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1447 sent += len;
1448 }
1449
1450 urb->dev = port->serial->dev;
1451 result = usb_submit_urb(urb, GFP_ATOMIC);
1452 if (result) {
1453 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1454 spin_lock_irqsave(&info->lock, flags);
1455 list_add(tmp, &info->rx_urbs_free);
1456 continue;
1457 }
1458
1459 spin_lock_irqsave(&info->lock, flags);
1460 list_add(tmp, &info->rx_urbs_submitted);
1461 }
1462 spin_unlock_irqrestore(&info->lock, flags);
1463
1464 if (sent)
1465 tty_flip_buffer_push(tty);
1466 }
1467
1468
1469 /*****************************************************************************
1470 * Connect Tech's White Heat module functions
1471 *****************************************************************************/
1472 static int __init whiteheat_init (void)
1473 {
1474 int retval;
1475 retval = usb_serial_register(&whiteheat_fake_device);
1476 if (retval)
1477 goto failed_fake_register;
1478 retval = usb_serial_register(&whiteheat_device);
1479 if (retval)
1480 goto failed_device_register;
1481 retval = usb_register(&whiteheat_driver);
1482 if (retval)
1483 goto failed_usb_register;
1484 info(DRIVER_DESC " " DRIVER_VERSION);
1485 return 0;
1486 failed_usb_register:
1487 usb_serial_deregister(&whiteheat_device);
1488 failed_device_register:
1489 usb_serial_deregister(&whiteheat_fake_device);
1490 failed_fake_register:
1491 return retval;
1492 }
1493
1494
1495 static void __exit whiteheat_exit (void)
1496 {
1497 usb_deregister (&whiteheat_driver);
1498 usb_serial_deregister (&whiteheat_fake_device);
1499 usb_serial_deregister (&whiteheat_device);
1500 }
1501
1502
1503 module_init(whiteheat_init);
1504 module_exit(whiteheat_exit);
1505
1506 MODULE_AUTHOR( DRIVER_AUTHOR );
1507 MODULE_DESCRIPTION( DRIVER_DESC );
1508 MODULE_LICENSE("GPL");
1509
1510 module_param(urb_pool_size, int, 0);
1511 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1512
1513 module_param(debug, bool, S_IRUGO | S_IWUSR);
1514 MODULE_PARM_DESC(debug, "Debug enabled or not");
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