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15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/slab.h>
18#include <linux/tty.h>
19#include <linux/tty_driver.h>
20#include <linux/tty_flip.h>
21#include <linux/module.h>
22#include <linux/spinlock.h>
23#include <linux/mutex.h>
24#include <linux/uaccess.h>
25#include <asm/termbits.h>
26#include <linux/usb.h>
27#include <linux/serial_reg.h>
28#include <linux/serial.h>
29#include <linux/usb/serial.h>
30#include <linux/usb/ezusb.h>
31#include "whiteheat.h"
32
33
34
35
36#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
37#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
38
39#define CONNECT_TECH_VENDOR_ID 0x0710
40#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
41#define CONNECT_TECH_WHITE_HEAT_ID 0x8001
42
43
44
45
46
47
48
49
50static const struct usb_device_id id_table_std[] = {
51 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
52 { }
53};
54
55static const struct usb_device_id id_table_prerenumeration[] = {
56 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
57 { }
58};
59
60static const struct usb_device_id id_table_combined[] = {
61 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
62 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
63 { }
64};
65
66MODULE_DEVICE_TABLE(usb, id_table_combined);
67
68
69
70static int whiteheat_firmware_download(struct usb_serial *serial,
71 const struct usb_device_id *id);
72static int whiteheat_firmware_attach(struct usb_serial *serial);
73
74
75static int whiteheat_attach(struct usb_serial *serial);
76static void whiteheat_release(struct usb_serial *serial);
77static int whiteheat_port_probe(struct usb_serial_port *port);
78static void whiteheat_port_remove(struct usb_serial_port *port);
79static int whiteheat_open(struct tty_struct *tty,
80 struct usb_serial_port *port);
81static void whiteheat_close(struct usb_serial_port *port);
82static void whiteheat_get_serial(struct tty_struct *tty,
83 struct serial_struct *ss);
84static void whiteheat_set_termios(struct tty_struct *tty,
85 struct usb_serial_port *port, struct ktermios *old);
86static int whiteheat_tiocmget(struct tty_struct *tty);
87static int whiteheat_tiocmset(struct tty_struct *tty,
88 unsigned int set, unsigned int clear);
89static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
90
91static struct usb_serial_driver whiteheat_fake_device = {
92 .driver = {
93 .owner = THIS_MODULE,
94 .name = "whiteheatnofirm",
95 },
96 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
97 .id_table = id_table_prerenumeration,
98 .num_ports = 1,
99 .probe = whiteheat_firmware_download,
100 .attach = whiteheat_firmware_attach,
101};
102
103static struct usb_serial_driver whiteheat_device = {
104 .driver = {
105 .owner = THIS_MODULE,
106 .name = "whiteheat",
107 },
108 .description = "Connect Tech - WhiteHEAT",
109 .id_table = id_table_std,
110 .num_ports = 4,
111 .num_bulk_in = 5,
112 .num_bulk_out = 5,
113 .attach = whiteheat_attach,
114 .release = whiteheat_release,
115 .port_probe = whiteheat_port_probe,
116 .port_remove = whiteheat_port_remove,
117 .open = whiteheat_open,
118 .close = whiteheat_close,
119 .get_serial = whiteheat_get_serial,
120 .set_termios = whiteheat_set_termios,
121 .break_ctl = whiteheat_break_ctl,
122 .tiocmget = whiteheat_tiocmget,
123 .tiocmset = whiteheat_tiocmset,
124 .throttle = usb_serial_generic_throttle,
125 .unthrottle = usb_serial_generic_unthrottle,
126};
127
128static struct usb_serial_driver * const serial_drivers[] = {
129 &whiteheat_fake_device, &whiteheat_device, NULL
130};
131
132struct whiteheat_command_private {
133 struct mutex mutex;
134 __u8 port_running;
135 __u8 command_finished;
136 wait_queue_head_t wait_command;
137
138
139 __u8 result_buffer[64];
140};
141
142struct whiteheat_private {
143 __u8 mcr;
144};
145
146
147
148static int start_command_port(struct usb_serial *serial);
149static void stop_command_port(struct usb_serial *serial);
150static void command_port_write_callback(struct urb *urb);
151static void command_port_read_callback(struct urb *urb);
152
153static int firm_send_command(struct usb_serial_port *port, __u8 command,
154 __u8 *data, __u8 datasize);
155static int firm_open(struct usb_serial_port *port);
156static int firm_close(struct usb_serial_port *port);
157static void firm_setup_port(struct tty_struct *tty);
158static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
159static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
160static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
161static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
162static int firm_get_dtr_rts(struct usb_serial_port *port);
163static int firm_report_tx_done(struct usb_serial_port *port);
164
165
166#define COMMAND_PORT 4
167#define COMMAND_TIMEOUT (2*HZ)
168#define COMMAND_TIMEOUT_MS 2000
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188static int whiteheat_firmware_download(struct usb_serial *serial,
189 const struct usb_device_id *id)
190{
191 int response;
192
193 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
194 if (response >= 0) {
195 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
196 if (response >= 0)
197 return 0;
198 }
199 return -ENOENT;
200}
201
202
203static int whiteheat_firmware_attach(struct usb_serial *serial)
204{
205
206 return 1;
207}
208
209
210
211
212
213
214static int whiteheat_attach(struct usb_serial *serial)
215{
216 struct usb_serial_port *command_port;
217 struct whiteheat_command_private *command_info;
218 struct whiteheat_hw_info *hw_info;
219 int pipe;
220 int ret;
221 int alen;
222 __u8 *command;
223 __u8 *result;
224
225 command_port = serial->port[COMMAND_PORT];
226
227 pipe = usb_sndbulkpipe(serial->dev,
228 command_port->bulk_out_endpointAddress);
229 command = kmalloc(2, GFP_KERNEL);
230 if (!command)
231 goto no_command_buffer;
232 command[0] = WHITEHEAT_GET_HW_INFO;
233 command[1] = 0;
234
235 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
236 if (!result)
237 goto no_result_buffer;
238
239
240
241
242
243 usb_clear_halt(serial->dev, pipe);
244 ret = usb_bulk_msg(serial->dev, pipe, command, 2,
245 &alen, COMMAND_TIMEOUT_MS);
246 if (ret) {
247 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
248 serial->type->description, ret);
249 goto no_firmware;
250 } else if (alen != 2) {
251 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
252 serial->type->description, alen);
253 goto no_firmware;
254 }
255
256 pipe = usb_rcvbulkpipe(serial->dev,
257 command_port->bulk_in_endpointAddress);
258
259 usb_clear_halt(serial->dev, pipe);
260 ret = usb_bulk_msg(serial->dev, pipe, result,
261 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
262 if (ret) {
263 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
264 serial->type->description, ret);
265 goto no_firmware;
266 } else if (alen != sizeof(*hw_info) + 1) {
267 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
268 serial->type->description, alen);
269 goto no_firmware;
270 } else if (result[0] != command[0]) {
271 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
272 serial->type->description, result[0]);
273 goto no_firmware;
274 }
275
276 hw_info = (struct whiteheat_hw_info *)&result[1];
277
278 dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n",
279 serial->type->description,
280 hw_info->sw_major_rev, hw_info->sw_minor_rev);
281
282 command_info = kmalloc(sizeof(struct whiteheat_command_private),
283 GFP_KERNEL);
284 if (!command_info)
285 goto no_command_private;
286
287 mutex_init(&command_info->mutex);
288 command_info->port_running = 0;
289 init_waitqueue_head(&command_info->wait_command);
290 usb_set_serial_port_data(command_port, command_info);
291 command_port->write_urb->complete = command_port_write_callback;
292 command_port->read_urb->complete = command_port_read_callback;
293 kfree(result);
294 kfree(command);
295
296 return 0;
297
298no_firmware:
299
300 dev_err(&serial->dev->dev,
301 "%s: Unable to retrieve firmware version, try replugging\n",
302 serial->type->description);
303 dev_err(&serial->dev->dev,
304 "%s: If the firmware is not running (status led not blinking)\n",
305 serial->type->description);
306 dev_err(&serial->dev->dev,
307 "%s: please contact support@connecttech.com\n",
308 serial->type->description);
309 kfree(result);
310 kfree(command);
311 return -ENODEV;
312
313no_command_private:
314 kfree(result);
315no_result_buffer:
316 kfree(command);
317no_command_buffer:
318 return -ENOMEM;
319}
320
321static void whiteheat_release(struct usb_serial *serial)
322{
323 struct usb_serial_port *command_port;
324
325
326 command_port = serial->port[COMMAND_PORT];
327 kfree(usb_get_serial_port_data(command_port));
328}
329
330static int whiteheat_port_probe(struct usb_serial_port *port)
331{
332 struct whiteheat_private *info;
333
334 info = kzalloc(sizeof(*info), GFP_KERNEL);
335 if (!info)
336 return -ENOMEM;
337
338 usb_set_serial_port_data(port, info);
339
340 return 0;
341}
342
343static void whiteheat_port_remove(struct usb_serial_port *port)
344{
345 struct whiteheat_private *info;
346
347 info = usb_get_serial_port_data(port);
348 kfree(info);
349}
350
351static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
352{
353 int retval;
354
355 retval = start_command_port(port->serial);
356 if (retval)
357 goto exit;
358
359
360 retval = firm_open(port);
361 if (retval) {
362 stop_command_port(port->serial);
363 goto exit;
364 }
365
366 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
367 if (retval) {
368 firm_close(port);
369 stop_command_port(port->serial);
370 goto exit;
371 }
372
373 if (tty)
374 firm_setup_port(tty);
375
376
377 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
378 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
379
380 retval = usb_serial_generic_open(tty, port);
381 if (retval) {
382 firm_close(port);
383 stop_command_port(port->serial);
384 goto exit;
385 }
386exit:
387 return retval;
388}
389
390
391static void whiteheat_close(struct usb_serial_port *port)
392{
393 firm_report_tx_done(port);
394 firm_close(port);
395
396 usb_serial_generic_close(port);
397
398 stop_command_port(port->serial);
399}
400
401static int whiteheat_tiocmget(struct tty_struct *tty)
402{
403 struct usb_serial_port *port = tty->driver_data;
404 struct whiteheat_private *info = usb_get_serial_port_data(port);
405 unsigned int modem_signals = 0;
406
407 firm_get_dtr_rts(port);
408 if (info->mcr & UART_MCR_DTR)
409 modem_signals |= TIOCM_DTR;
410 if (info->mcr & UART_MCR_RTS)
411 modem_signals |= TIOCM_RTS;
412
413 return modem_signals;
414}
415
416static int whiteheat_tiocmset(struct tty_struct *tty,
417 unsigned int set, unsigned int clear)
418{
419 struct usb_serial_port *port = tty->driver_data;
420 struct whiteheat_private *info = usb_get_serial_port_data(port);
421
422 if (set & TIOCM_RTS)
423 info->mcr |= UART_MCR_RTS;
424 if (set & TIOCM_DTR)
425 info->mcr |= UART_MCR_DTR;
426
427 if (clear & TIOCM_RTS)
428 info->mcr &= ~UART_MCR_RTS;
429 if (clear & TIOCM_DTR)
430 info->mcr &= ~UART_MCR_DTR;
431
432 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
433 firm_set_rts(port, info->mcr & UART_MCR_RTS);
434 return 0;
435}
436
437
438static void whiteheat_get_serial(struct tty_struct *tty, struct serial_struct *ss)
439{
440 ss->baud_base = 460800;
441}
442
443
444static void whiteheat_set_termios(struct tty_struct *tty,
445 struct usb_serial_port *port, struct ktermios *old_termios)
446{
447 firm_setup_port(tty);
448}
449
450static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
451{
452 struct usb_serial_port *port = tty->driver_data;
453 firm_set_break(port, break_state);
454}
455
456
457
458
459
460static void command_port_write_callback(struct urb *urb)
461{
462 int status = urb->status;
463
464 if (status) {
465 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status);
466 return;
467 }
468}
469
470
471static void command_port_read_callback(struct urb *urb)
472{
473 struct usb_serial_port *command_port = urb->context;
474 struct whiteheat_command_private *command_info;
475 int status = urb->status;
476 unsigned char *data = urb->transfer_buffer;
477 int result;
478
479 command_info = usb_get_serial_port_data(command_port);
480 if (!command_info) {
481 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
482 return;
483 }
484 if (!urb->actual_length) {
485 dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__);
486 return;
487 }
488 if (status) {
489 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
490 if (status != -ENOENT)
491 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
492 wake_up(&command_info->wait_command);
493 return;
494 }
495
496 usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data);
497
498 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
499 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
500 wake_up(&command_info->wait_command);
501 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
502 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
503 wake_up(&command_info->wait_command);
504 } else if (data[0] == WHITEHEAT_EVENT) {
505
506
507 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
508 } else if ((data[0] == WHITEHEAT_GET_DTR_RTS) &&
509 (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
510 memcpy(command_info->result_buffer, &data[1],
511 urb->actual_length - 1);
512 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
513 wake_up(&command_info->wait_command);
514 } else
515 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
516
517
518 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
519 if (result)
520 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
521 __func__, result);
522}
523
524
525
526
527
528static int firm_send_command(struct usb_serial_port *port, __u8 command,
529 __u8 *data, __u8 datasize)
530{
531 struct usb_serial_port *command_port;
532 struct whiteheat_command_private *command_info;
533 struct whiteheat_private *info;
534 struct device *dev = &port->dev;
535 __u8 *transfer_buffer;
536 int retval = 0;
537 int t;
538
539 dev_dbg(dev, "%s - command %d\n", __func__, command);
540
541 command_port = port->serial->port[COMMAND_PORT];
542 command_info = usb_get_serial_port_data(command_port);
543
544 if (command_port->bulk_out_size < datasize + 1)
545 return -EIO;
546
547 mutex_lock(&command_info->mutex);
548 command_info->command_finished = false;
549
550 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
551 transfer_buffer[0] = command;
552 memcpy(&transfer_buffer[1], data, datasize);
553 command_port->write_urb->transfer_buffer_length = datasize + 1;
554 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
555 if (retval) {
556 dev_dbg(dev, "%s - submit urb failed\n", __func__);
557 goto exit;
558 }
559
560
561 t = wait_event_timeout(command_info->wait_command,
562 (bool)command_info->command_finished, COMMAND_TIMEOUT);
563 if (!t)
564 usb_kill_urb(command_port->write_urb);
565
566 if (command_info->command_finished == false) {
567 dev_dbg(dev, "%s - command timed out.\n", __func__);
568 retval = -ETIMEDOUT;
569 goto exit;
570 }
571
572 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
573 dev_dbg(dev, "%s - command failed.\n", __func__);
574 retval = -EIO;
575 goto exit;
576 }
577
578 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
579 dev_dbg(dev, "%s - command completed.\n", __func__);
580 switch (command) {
581 case WHITEHEAT_GET_DTR_RTS:
582 info = usb_get_serial_port_data(port);
583 info->mcr = command_info->result_buffer[0];
584 break;
585 }
586 }
587exit:
588 mutex_unlock(&command_info->mutex);
589 return retval;
590}
591
592
593static int firm_open(struct usb_serial_port *port)
594{
595 struct whiteheat_simple open_command;
596
597 open_command.port = port->port_number + 1;
598 return firm_send_command(port, WHITEHEAT_OPEN,
599 (__u8 *)&open_command, sizeof(open_command));
600}
601
602
603static int firm_close(struct usb_serial_port *port)
604{
605 struct whiteheat_simple close_command;
606
607 close_command.port = port->port_number + 1;
608 return firm_send_command(port, WHITEHEAT_CLOSE,
609 (__u8 *)&close_command, sizeof(close_command));
610}
611
612
613static void firm_setup_port(struct tty_struct *tty)
614{
615 struct usb_serial_port *port = tty->driver_data;
616 struct device *dev = &port->dev;
617 struct whiteheat_port_settings port_settings;
618 unsigned int cflag = tty->termios.c_cflag;
619 speed_t baud;
620
621 port_settings.port = port->port_number + 1;
622
623 port_settings.bits = tty_get_char_size(cflag);
624 dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
625
626
627 if (cflag & PARENB)
628 if (cflag & CMSPAR)
629 if (cflag & PARODD)
630 port_settings.parity = WHITEHEAT_PAR_MARK;
631 else
632 port_settings.parity = WHITEHEAT_PAR_SPACE;
633 else
634 if (cflag & PARODD)
635 port_settings.parity = WHITEHEAT_PAR_ODD;
636 else
637 port_settings.parity = WHITEHEAT_PAR_EVEN;
638 else
639 port_settings.parity = WHITEHEAT_PAR_NONE;
640 dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
641
642
643 if (cflag & CSTOPB)
644 port_settings.stop = 2;
645 else
646 port_settings.stop = 1;
647 dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop);
648
649
650 if (cflag & CRTSCTS)
651 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
652 WHITEHEAT_HFLOW_RTS);
653 else
654 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
655 dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__,
656 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
657 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
658 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
659 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
660
661
662 if (I_IXOFF(tty))
663 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
664 else
665 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
666 dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
667
668 port_settings.xon = START_CHAR(tty);
669 port_settings.xoff = STOP_CHAR(tty);
670 dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
671
672
673 baud = tty_get_baud_rate(tty);
674 port_settings.baud = cpu_to_le32(baud);
675 dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud);
676
677
678 tty_encode_baud_rate(tty, baud, baud);
679
680
681 port_settings.lloop = 0;
682
683
684 firm_send_command(port, WHITEHEAT_SETUP_PORT,
685 (__u8 *)&port_settings, sizeof(port_settings));
686}
687
688
689static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
690{
691 struct whiteheat_set_rdb rts_command;
692
693 rts_command.port = port->port_number + 1;
694 rts_command.state = onoff;
695 return firm_send_command(port, WHITEHEAT_SET_RTS,
696 (__u8 *)&rts_command, sizeof(rts_command));
697}
698
699
700static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
701{
702 struct whiteheat_set_rdb dtr_command;
703
704 dtr_command.port = port->port_number + 1;
705 dtr_command.state = onoff;
706 return firm_send_command(port, WHITEHEAT_SET_DTR,
707 (__u8 *)&dtr_command, sizeof(dtr_command));
708}
709
710
711static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
712{
713 struct whiteheat_set_rdb break_command;
714
715 break_command.port = port->port_number + 1;
716 break_command.state = onoff;
717 return firm_send_command(port, WHITEHEAT_SET_BREAK,
718 (__u8 *)&break_command, sizeof(break_command));
719}
720
721
722static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
723{
724 struct whiteheat_purge purge_command;
725
726 purge_command.port = port->port_number + 1;
727 purge_command.what = rxtx;
728 return firm_send_command(port, WHITEHEAT_PURGE,
729 (__u8 *)&purge_command, sizeof(purge_command));
730}
731
732
733static int firm_get_dtr_rts(struct usb_serial_port *port)
734{
735 struct whiteheat_simple get_dr_command;
736
737 get_dr_command.port = port->port_number + 1;
738 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
739 (__u8 *)&get_dr_command, sizeof(get_dr_command));
740}
741
742
743static int firm_report_tx_done(struct usb_serial_port *port)
744{
745 struct whiteheat_simple close_command;
746
747 close_command.port = port->port_number + 1;
748 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
749 (__u8 *)&close_command, sizeof(close_command));
750}
751
752
753
754
755
756static int start_command_port(struct usb_serial *serial)
757{
758 struct usb_serial_port *command_port;
759 struct whiteheat_command_private *command_info;
760 int retval = 0;
761
762 command_port = serial->port[COMMAND_PORT];
763 command_info = usb_get_serial_port_data(command_port);
764 mutex_lock(&command_info->mutex);
765 if (!command_info->port_running) {
766
767 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
768
769 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
770 if (retval) {
771 dev_err(&serial->dev->dev,
772 "%s - failed submitting read urb, error %d\n",
773 __func__, retval);
774 goto exit;
775 }
776 }
777 command_info->port_running++;
778
779exit:
780 mutex_unlock(&command_info->mutex);
781 return retval;
782}
783
784
785static void stop_command_port(struct usb_serial *serial)
786{
787 struct usb_serial_port *command_port;
788 struct whiteheat_command_private *command_info;
789
790 command_port = serial->port[COMMAND_PORT];
791 command_info = usb_get_serial_port_data(command_port);
792 mutex_lock(&command_info->mutex);
793 command_info->port_running--;
794 if (!command_info->port_running)
795 usb_kill_urb(command_port->read_urb);
796 mutex_unlock(&command_info->mutex);
797}
798
799module_usb_serial_driver(serial_drivers, id_table_combined);
800
801MODULE_AUTHOR(DRIVER_AUTHOR);
802MODULE_DESCRIPTION(DRIVER_DESC);
803MODULE_LICENSE("GPL");
804
805MODULE_FIRMWARE("whiteheat.fw");
806MODULE_FIRMWARE("whiteheat_loader.fw");
807
