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19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <linux/tty.h>
24#include <linux/tty_driver.h>
25#include <linux/tty_flip.h>
26#include <linux/module.h>
27#include <linux/spinlock.h>
28#include <linux/mutex.h>
29#include <linux/uaccess.h>
30#include <asm/termbits.h>
31#include <linux/usb.h>
32#include <linux/serial_reg.h>
33#include <linux/serial.h>
34#include <linux/usb/serial.h>
35#include <linux/usb/ezusb.h>
36#include "whiteheat.h"
37
38#ifndef CMSPAR
39#define CMSPAR 0
40#endif
41
42
43
44
45#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
46#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
47
48#define CONNECT_TECH_VENDOR_ID 0x0710
49#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
50#define CONNECT_TECH_WHITE_HEAT_ID 0x8001
51
52
53
54
55
56
57
58
59static const struct usb_device_id id_table_std[] = {
60 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
61 { }
62};
63
64static const struct usb_device_id id_table_prerenumeration[] = {
65 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
66 { }
67};
68
69static const struct usb_device_id id_table_combined[] = {
70 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
71 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
72 { }
73};
74
75MODULE_DEVICE_TABLE(usb, id_table_combined);
76
77
78
79static int whiteheat_firmware_download(struct usb_serial *serial,
80 const struct usb_device_id *id);
81static int whiteheat_firmware_attach(struct usb_serial *serial);
82
83
84static int whiteheat_attach(struct usb_serial *serial);
85static void whiteheat_release(struct usb_serial *serial);
86static int whiteheat_port_probe(struct usb_serial_port *port);
87static int whiteheat_port_remove(struct usb_serial_port *port);
88static int whiteheat_open(struct tty_struct *tty,
89 struct usb_serial_port *port);
90static void whiteheat_close(struct usb_serial_port *port);
91static int whiteheat_ioctl(struct tty_struct *tty,
92 unsigned int cmd, unsigned long arg);
93static void whiteheat_set_termios(struct tty_struct *tty,
94 struct usb_serial_port *port, struct ktermios *old);
95static int whiteheat_tiocmget(struct tty_struct *tty);
96static int whiteheat_tiocmset(struct tty_struct *tty,
97 unsigned int set, unsigned int clear);
98static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
99
100static struct usb_serial_driver whiteheat_fake_device = {
101 .driver = {
102 .owner = THIS_MODULE,
103 .name = "whiteheatnofirm",
104 },
105 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
106 .id_table = id_table_prerenumeration,
107 .num_ports = 1,
108 .probe = whiteheat_firmware_download,
109 .attach = whiteheat_firmware_attach,
110};
111
112static struct usb_serial_driver whiteheat_device = {
113 .driver = {
114 .owner = THIS_MODULE,
115 .name = "whiteheat",
116 },
117 .description = "Connect Tech - WhiteHEAT",
118 .id_table = id_table_std,
119 .num_ports = 4,
120 .attach = whiteheat_attach,
121 .release = whiteheat_release,
122 .port_probe = whiteheat_port_probe,
123 .port_remove = whiteheat_port_remove,
124 .open = whiteheat_open,
125 .close = whiteheat_close,
126 .ioctl = whiteheat_ioctl,
127 .set_termios = whiteheat_set_termios,
128 .break_ctl = whiteheat_break_ctl,
129 .tiocmget = whiteheat_tiocmget,
130 .tiocmset = whiteheat_tiocmset,
131 .throttle = usb_serial_generic_throttle,
132 .unthrottle = usb_serial_generic_unthrottle,
133};
134
135static struct usb_serial_driver * const serial_drivers[] = {
136 &whiteheat_fake_device, &whiteheat_device, NULL
137};
138
139struct whiteheat_command_private {
140 struct mutex mutex;
141 __u8 port_running;
142 __u8 command_finished;
143 wait_queue_head_t wait_command;
144
145
146 __u8 result_buffer[64];
147};
148
149struct whiteheat_private {
150 __u8 mcr;
151};
152
153
154
155static int start_command_port(struct usb_serial *serial);
156static void stop_command_port(struct usb_serial *serial);
157static void command_port_write_callback(struct urb *urb);
158static void command_port_read_callback(struct urb *urb);
159
160static int firm_send_command(struct usb_serial_port *port, __u8 command,
161 __u8 *data, __u8 datasize);
162static int firm_open(struct usb_serial_port *port);
163static int firm_close(struct usb_serial_port *port);
164static void firm_setup_port(struct tty_struct *tty);
165static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
166static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
167static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
168static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
169static int firm_get_dtr_rts(struct usb_serial_port *port);
170static int firm_report_tx_done(struct usb_serial_port *port);
171
172
173#define COMMAND_PORT 4
174#define COMMAND_TIMEOUT (2*HZ)
175#define COMMAND_TIMEOUT_MS 2000
176#define CLOSING_DELAY (30 * HZ)
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196static int whiteheat_firmware_download(struct usb_serial *serial,
197 const struct usb_device_id *id)
198{
199 int response;
200
201 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
202 if (response >= 0) {
203 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
204 if (response >= 0)
205 return 0;
206 }
207 return -ENOENT;
208}
209
210
211static int whiteheat_firmware_attach(struct usb_serial *serial)
212{
213
214 return 1;
215}
216
217
218
219
220
221static int whiteheat_attach(struct usb_serial *serial)
222{
223 struct usb_serial_port *command_port;
224 struct whiteheat_command_private *command_info;
225 struct whiteheat_hw_info *hw_info;
226 int pipe;
227 int ret;
228 int alen;
229 __u8 *command;
230 __u8 *result;
231
232 command_port = serial->port[COMMAND_PORT];
233
234 pipe = usb_sndbulkpipe(serial->dev,
235 command_port->bulk_out_endpointAddress);
236 command = kmalloc(2, GFP_KERNEL);
237 if (!command)
238 goto no_command_buffer;
239 command[0] = WHITEHEAT_GET_HW_INFO;
240 command[1] = 0;
241
242 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
243 if (!result)
244 goto no_result_buffer;
245
246
247
248
249
250 usb_clear_halt(serial->dev, pipe);
251 ret = usb_bulk_msg(serial->dev, pipe, command, 2,
252 &alen, COMMAND_TIMEOUT_MS);
253 if (ret) {
254 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
255 serial->type->description, ret);
256 goto no_firmware;
257 } else if (alen != 2) {
258 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
259 serial->type->description, alen);
260 goto no_firmware;
261 }
262
263 pipe = usb_rcvbulkpipe(serial->dev,
264 command_port->bulk_in_endpointAddress);
265
266 usb_clear_halt(serial->dev, pipe);
267 ret = usb_bulk_msg(serial->dev, pipe, result,
268 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
269 if (ret) {
270 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
271 serial->type->description, ret);
272 goto no_firmware;
273 } else if (alen != sizeof(*hw_info) + 1) {
274 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
275 serial->type->description, alen);
276 goto no_firmware;
277 } else if (result[0] != command[0]) {
278 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
279 serial->type->description, result[0]);
280 goto no_firmware;
281 }
282
283 hw_info = (struct whiteheat_hw_info *)&result[1];
284
285 dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n",
286 serial->type->description,
287 hw_info->sw_major_rev, hw_info->sw_minor_rev);
288
289 command_info = kmalloc(sizeof(struct whiteheat_command_private),
290 GFP_KERNEL);
291 if (command_info == NULL) {
292 dev_err(&serial->dev->dev,
293 "%s: Out of memory for port structures\n",
294 serial->type->description);
295 goto no_command_private;
296 }
297
298 mutex_init(&command_info->mutex);
299 command_info->port_running = 0;
300 init_waitqueue_head(&command_info->wait_command);
301 usb_set_serial_port_data(command_port, command_info);
302 command_port->write_urb->complete = command_port_write_callback;
303 command_port->read_urb->complete = command_port_read_callback;
304 kfree(result);
305 kfree(command);
306
307 return 0;
308
309no_firmware:
310
311 dev_err(&serial->dev->dev,
312 "%s: Unable to retrieve firmware version, try replugging\n",
313 serial->type->description);
314 dev_err(&serial->dev->dev,
315 "%s: If the firmware is not running (status led not blinking)\n",
316 serial->type->description);
317 dev_err(&serial->dev->dev,
318 "%s: please contact support@connecttech.com\n",
319 serial->type->description);
320 kfree(result);
321 kfree(command);
322 return -ENODEV;
323
324no_command_private:
325 kfree(result);
326no_result_buffer:
327 kfree(command);
328no_command_buffer:
329 return -ENOMEM;
330}
331
332static void whiteheat_release(struct usb_serial *serial)
333{
334 struct usb_serial_port *command_port;
335
336
337 command_port = serial->port[COMMAND_PORT];
338 kfree(usb_get_serial_port_data(command_port));
339}
340
341static int whiteheat_port_probe(struct usb_serial_port *port)
342{
343 struct whiteheat_private *info;
344
345 info = kzalloc(sizeof(*info), GFP_KERNEL);
346 if (!info)
347 return -ENOMEM;
348
349 usb_set_serial_port_data(port, info);
350
351 return 0;
352}
353
354static int whiteheat_port_remove(struct usb_serial_port *port)
355{
356 struct whiteheat_private *info;
357
358 info = usb_get_serial_port_data(port);
359 kfree(info);
360
361 return 0;
362}
363
364static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
365{
366 int retval;
367
368 retval = start_command_port(port->serial);
369 if (retval)
370 goto exit;
371
372
373 retval = firm_open(port);
374 if (retval) {
375 stop_command_port(port->serial);
376 goto exit;
377 }
378
379 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
380 if (retval) {
381 firm_close(port);
382 stop_command_port(port->serial);
383 goto exit;
384 }
385
386 if (tty)
387 firm_setup_port(tty);
388
389
390 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
391 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
392
393 retval = usb_serial_generic_open(tty, port);
394 if (retval) {
395 firm_close(port);
396 stop_command_port(port->serial);
397 goto exit;
398 }
399exit:
400 return retval;
401}
402
403
404static void whiteheat_close(struct usb_serial_port *port)
405{
406 firm_report_tx_done(port);
407 firm_close(port);
408
409 usb_serial_generic_close(port);
410
411 stop_command_port(port->serial);
412}
413
414static int whiteheat_tiocmget(struct tty_struct *tty)
415{
416 struct usb_serial_port *port = tty->driver_data;
417 struct whiteheat_private *info = usb_get_serial_port_data(port);
418 unsigned int modem_signals = 0;
419
420 firm_get_dtr_rts(port);
421 if (info->mcr & UART_MCR_DTR)
422 modem_signals |= TIOCM_DTR;
423 if (info->mcr & UART_MCR_RTS)
424 modem_signals |= TIOCM_RTS;
425
426 return modem_signals;
427}
428
429static int whiteheat_tiocmset(struct tty_struct *tty,
430 unsigned int set, unsigned int clear)
431{
432 struct usb_serial_port *port = tty->driver_data;
433 struct whiteheat_private *info = usb_get_serial_port_data(port);
434
435 if (set & TIOCM_RTS)
436 info->mcr |= UART_MCR_RTS;
437 if (set & TIOCM_DTR)
438 info->mcr |= UART_MCR_DTR;
439
440 if (clear & TIOCM_RTS)
441 info->mcr &= ~UART_MCR_RTS;
442 if (clear & TIOCM_DTR)
443 info->mcr &= ~UART_MCR_DTR;
444
445 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
446 firm_set_rts(port, info->mcr & UART_MCR_RTS);
447 return 0;
448}
449
450
451static int whiteheat_ioctl(struct tty_struct *tty,
452 unsigned int cmd, unsigned long arg)
453{
454 struct usb_serial_port *port = tty->driver_data;
455 struct serial_struct serstruct;
456 void __user *user_arg = (void __user *)arg;
457
458 dev_dbg(&port->dev, "%s - cmd 0x%.4x\n", __func__, cmd);
459
460 switch (cmd) {
461 case TIOCGSERIAL:
462 memset(&serstruct, 0, sizeof(serstruct));
463 serstruct.type = PORT_16654;
464 serstruct.line = port->serial->minor;
465 serstruct.port = port->number;
466 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
467 serstruct.xmit_fifo_size = kfifo_size(&port->write_fifo);
468 serstruct.custom_divisor = 0;
469 serstruct.baud_base = 460800;
470 serstruct.close_delay = CLOSING_DELAY;
471 serstruct.closing_wait = CLOSING_DELAY;
472
473 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
474 return -EFAULT;
475 break;
476 default:
477 break;
478 }
479
480 return -ENOIOCTLCMD;
481}
482
483
484static void whiteheat_set_termios(struct tty_struct *tty,
485 struct usb_serial_port *port, struct ktermios *old_termios)
486{
487 firm_setup_port(tty);
488}
489
490static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
491{
492 struct usb_serial_port *port = tty->driver_data;
493 firm_set_break(port, break_state);
494}
495
496
497
498
499
500static void command_port_write_callback(struct urb *urb)
501{
502 int status = urb->status;
503
504 if (status) {
505 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status);
506 return;
507 }
508}
509
510
511static void command_port_read_callback(struct urb *urb)
512{
513 struct usb_serial_port *command_port = urb->context;
514 struct whiteheat_command_private *command_info;
515 int status = urb->status;
516 unsigned char *data = urb->transfer_buffer;
517 int result;
518
519 command_info = usb_get_serial_port_data(command_port);
520 if (!command_info) {
521 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
522 return;
523 }
524 if (status) {
525 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
526 if (status != -ENOENT)
527 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
528 wake_up(&command_info->wait_command);
529 return;
530 }
531
532 usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data);
533
534 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
535 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
536 wake_up(&command_info->wait_command);
537 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
538 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
539 wake_up(&command_info->wait_command);
540 } else if (data[0] == WHITEHEAT_EVENT) {
541
542
543 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
544 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
545 memcpy(command_info->result_buffer, &data[1],
546 urb->actual_length - 1);
547 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
548 wake_up(&command_info->wait_command);
549 } else
550 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
551
552
553 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
554 if (result)
555 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
556 __func__, result);
557}
558
559
560
561
562
563static int firm_send_command(struct usb_serial_port *port, __u8 command,
564 __u8 *data, __u8 datasize)
565{
566 struct usb_serial_port *command_port;
567 struct whiteheat_command_private *command_info;
568 struct whiteheat_private *info;
569 struct device *dev = &port->dev;
570 __u8 *transfer_buffer;
571 int retval = 0;
572 int t;
573
574 dev_dbg(dev, "%s - command %d\n", __func__, command);
575
576 command_port = port->serial->port[COMMAND_PORT];
577 command_info = usb_get_serial_port_data(command_port);
578 mutex_lock(&command_info->mutex);
579 command_info->command_finished = false;
580
581 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
582 transfer_buffer[0] = command;
583 memcpy(&transfer_buffer[1], data, datasize);
584 command_port->write_urb->transfer_buffer_length = datasize + 1;
585 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
586 if (retval) {
587 dev_dbg(dev, "%s - submit urb failed\n", __func__);
588 goto exit;
589 }
590
591
592 t = wait_event_timeout(command_info->wait_command,
593 (bool)command_info->command_finished, COMMAND_TIMEOUT);
594 if (!t)
595 usb_kill_urb(command_port->write_urb);
596
597 if (command_info->command_finished == false) {
598 dev_dbg(dev, "%s - command timed out.\n", __func__);
599 retval = -ETIMEDOUT;
600 goto exit;
601 }
602
603 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
604 dev_dbg(dev, "%s - command failed.\n", __func__);
605 retval = -EIO;
606 goto exit;
607 }
608
609 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
610 dev_dbg(dev, "%s - command completed.\n", __func__);
611 switch (command) {
612 case WHITEHEAT_GET_DTR_RTS:
613 info = usb_get_serial_port_data(port);
614 memcpy(&info->mcr, command_info->result_buffer,
615 sizeof(struct whiteheat_dr_info));
616 break;
617 }
618 }
619exit:
620 mutex_unlock(&command_info->mutex);
621 return retval;
622}
623
624
625static int firm_open(struct usb_serial_port *port)
626{
627 struct whiteheat_simple open_command;
628
629 open_command.port = port->number - port->serial->minor + 1;
630 return firm_send_command(port, WHITEHEAT_OPEN,
631 (__u8 *)&open_command, sizeof(open_command));
632}
633
634
635static int firm_close(struct usb_serial_port *port)
636{
637 struct whiteheat_simple close_command;
638
639 close_command.port = port->number - port->serial->minor + 1;
640 return firm_send_command(port, WHITEHEAT_CLOSE,
641 (__u8 *)&close_command, sizeof(close_command));
642}
643
644
645static void firm_setup_port(struct tty_struct *tty)
646{
647 struct usb_serial_port *port = tty->driver_data;
648 struct device *dev = &port->dev;
649 struct whiteheat_port_settings port_settings;
650 unsigned int cflag = tty->termios.c_cflag;
651
652 port_settings.port = port->number + 1;
653
654
655 switch (cflag & CSIZE) {
656 case CS5: port_settings.bits = 5; break;
657 case CS6: port_settings.bits = 6; break;
658 case CS7: port_settings.bits = 7; break;
659 default:
660 case CS8: port_settings.bits = 8; break;
661 }
662 dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
663
664
665 if (cflag & PARENB)
666 if (cflag & CMSPAR)
667 if (cflag & PARODD)
668 port_settings.parity = WHITEHEAT_PAR_MARK;
669 else
670 port_settings.parity = WHITEHEAT_PAR_SPACE;
671 else
672 if (cflag & PARODD)
673 port_settings.parity = WHITEHEAT_PAR_ODD;
674 else
675 port_settings.parity = WHITEHEAT_PAR_EVEN;
676 else
677 port_settings.parity = WHITEHEAT_PAR_NONE;
678 dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
679
680
681 if (cflag & CSTOPB)
682 port_settings.stop = 2;
683 else
684 port_settings.stop = 1;
685 dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop);
686
687
688 if (cflag & CRTSCTS)
689 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
690 WHITEHEAT_HFLOW_RTS);
691 else
692 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
693 dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__,
694 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
695 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
696 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
697 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
698
699
700 if (I_IXOFF(tty))
701 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
702 else
703 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
704 dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
705
706 port_settings.xon = START_CHAR(tty);
707 port_settings.xoff = STOP_CHAR(tty);
708 dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
709
710
711 port_settings.baud = tty_get_baud_rate(tty);
712 dev_dbg(dev, "%s - baud rate = %d\n", __func__, port_settings.baud);
713
714
715 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
716
717 port_settings.lloop = 0;
718
719
720 firm_send_command(port, WHITEHEAT_SETUP_PORT,
721 (__u8 *)&port_settings, sizeof(port_settings));
722}
723
724
725static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
726{
727 struct whiteheat_set_rdb rts_command;
728
729 rts_command.port = port->number - port->serial->minor + 1;
730 rts_command.state = onoff;
731 return firm_send_command(port, WHITEHEAT_SET_RTS,
732 (__u8 *)&rts_command, sizeof(rts_command));
733}
734
735
736static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
737{
738 struct whiteheat_set_rdb dtr_command;
739
740 dtr_command.port = port->number - port->serial->minor + 1;
741 dtr_command.state = onoff;
742 return firm_send_command(port, WHITEHEAT_SET_DTR,
743 (__u8 *)&dtr_command, sizeof(dtr_command));
744}
745
746
747static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
748{
749 struct whiteheat_set_rdb break_command;
750
751 break_command.port = port->number - port->serial->minor + 1;
752 break_command.state = onoff;
753 return firm_send_command(port, WHITEHEAT_SET_BREAK,
754 (__u8 *)&break_command, sizeof(break_command));
755}
756
757
758static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
759{
760 struct whiteheat_purge purge_command;
761
762 purge_command.port = port->number - port->serial->minor + 1;
763 purge_command.what = rxtx;
764 return firm_send_command(port, WHITEHEAT_PURGE,
765 (__u8 *)&purge_command, sizeof(purge_command));
766}
767
768
769static int firm_get_dtr_rts(struct usb_serial_port *port)
770{
771 struct whiteheat_simple get_dr_command;
772
773 get_dr_command.port = port->number - port->serial->minor + 1;
774 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
775 (__u8 *)&get_dr_command, sizeof(get_dr_command));
776}
777
778
779static int firm_report_tx_done(struct usb_serial_port *port)
780{
781 struct whiteheat_simple close_command;
782
783 close_command.port = port->number - port->serial->minor + 1;
784 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
785 (__u8 *)&close_command, sizeof(close_command));
786}
787
788
789
790
791
792static int start_command_port(struct usb_serial *serial)
793{
794 struct usb_serial_port *command_port;
795 struct whiteheat_command_private *command_info;
796 int retval = 0;
797
798 command_port = serial->port[COMMAND_PORT];
799 command_info = usb_get_serial_port_data(command_port);
800 mutex_lock(&command_info->mutex);
801 if (!command_info->port_running) {
802
803 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
804
805 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
806 if (retval) {
807 dev_err(&serial->dev->dev,
808 "%s - failed submitting read urb, error %d\n",
809 __func__, retval);
810 goto exit;
811 }
812 }
813 command_info->port_running++;
814
815exit:
816 mutex_unlock(&command_info->mutex);
817 return retval;
818}
819
820
821static void stop_command_port(struct usb_serial *serial)
822{
823 struct usb_serial_port *command_port;
824 struct whiteheat_command_private *command_info;
825
826 command_port = serial->port[COMMAND_PORT];
827 command_info = usb_get_serial_port_data(command_port);
828 mutex_lock(&command_info->mutex);
829 command_info->port_running--;
830 if (!command_info->port_running)
831 usb_kill_urb(command_port->read_urb);
832 mutex_unlock(&command_info->mutex);
833}
834
835module_usb_serial_driver(serial_drivers, id_table_combined);
836
837MODULE_AUTHOR(DRIVER_AUTHOR);
838MODULE_DESCRIPTION(DRIVER_DESC);
839MODULE_LICENSE("GPL");
840
841MODULE_FIRMWARE("whiteheat.fw");
842MODULE_FIRMWARE("whiteheat_loader.fw");
843
