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