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70#include <linux/kernel.h>
71#include <linux/errno.h>
72#include <linux/init.h>
73#include <linux/slab.h>
74#include <linux/tty.h>
75#include <linux/tty_driver.h>
76#include <linux/tty_flip.h>
77#include <linux/module.h>
78#include <linux/spinlock.h>
79#include <linux/mutex.h>
80#include <linux/uaccess.h>
81#include <asm/termbits.h>
82#include <linux/usb.h>
83#include <linux/serial_reg.h>
84#include <linux/serial.h>
85#include <linux/usb/serial.h>
86#include <linux/firmware.h>
87#include <linux/ihex.h>
88#include "whiteheat.h"
89
90static int debug;
91
92#ifndef CMSPAR
93#define CMSPAR 0
94#endif
95
96
97
98
99#define DRIVER_VERSION "v2.0"
100#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
101#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
102
103#define CONNECT_TECH_VENDOR_ID 0x0710
104#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
105#define CONNECT_TECH_WHITE_HEAT_ID 0x8001
106
107
108
109
110
111
112
113
114static struct usb_device_id id_table_std [] = {
115 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
116 { }
117};
118
119static struct usb_device_id id_table_prerenumeration [] = {
120 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
121 { }
122};
123
124static struct usb_device_id id_table_combined [] = {
125 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
126 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
127 { }
128};
129
130MODULE_DEVICE_TABLE(usb, id_table_combined);
131
132static struct usb_driver whiteheat_driver = {
133 .name = "whiteheat",
134 .probe = usb_serial_probe,
135 .disconnect = usb_serial_disconnect,
136 .id_table = id_table_combined,
137 .no_dynamic_id = 1,
138};
139
140
141static int whiteheat_firmware_download(struct usb_serial *serial,
142 const struct usb_device_id *id);
143static int whiteheat_firmware_attach(struct usb_serial *serial);
144
145
146static int whiteheat_attach(struct usb_serial *serial);
147static void whiteheat_release(struct usb_serial *serial);
148static int whiteheat_open(struct tty_struct *tty,
149 struct usb_serial_port *port, struct file *filp);
150static void whiteheat_close(struct usb_serial_port *port);
151static int whiteheat_write(struct tty_struct *tty,
152 struct usb_serial_port *port,
153 const unsigned char *buf, int count);
154static int whiteheat_write_room(struct tty_struct *tty);
155static int whiteheat_ioctl(struct tty_struct *tty, struct file *file,
156 unsigned int cmd, unsigned long arg);
157static void whiteheat_set_termios(struct tty_struct *tty,
158 struct usb_serial_port *port, struct ktermios *old);
159static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file);
160static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
161 unsigned int set, unsigned int clear);
162static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
163static int whiteheat_chars_in_buffer(struct tty_struct *tty);
164static void whiteheat_throttle(struct tty_struct *tty);
165static void whiteheat_unthrottle(struct tty_struct *tty);
166static void whiteheat_read_callback(struct urb *urb);
167static void whiteheat_write_callback(struct urb *urb);
168
169static struct usb_serial_driver whiteheat_fake_device = {
170 .driver = {
171 .owner = THIS_MODULE,
172 .name = "whiteheatnofirm",
173 },
174 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
175 .usb_driver = &whiteheat_driver,
176 .id_table = id_table_prerenumeration,
177 .num_ports = 1,
178 .probe = whiteheat_firmware_download,
179 .attach = whiteheat_firmware_attach,
180};
181
182static struct usb_serial_driver whiteheat_device = {
183 .driver = {
184 .owner = THIS_MODULE,
185 .name = "whiteheat",
186 },
187 .description = "Connect Tech - WhiteHEAT",
188 .usb_driver = &whiteheat_driver,
189 .id_table = id_table_std,
190 .num_ports = 4,
191 .attach = whiteheat_attach,
192 .release = whiteheat_release,
193 .open = whiteheat_open,
194 .close = whiteheat_close,
195 .write = whiteheat_write,
196 .write_room = whiteheat_write_room,
197 .ioctl = whiteheat_ioctl,
198 .set_termios = whiteheat_set_termios,
199 .break_ctl = whiteheat_break_ctl,
200 .tiocmget = whiteheat_tiocmget,
201 .tiocmset = whiteheat_tiocmset,
202 .chars_in_buffer = whiteheat_chars_in_buffer,
203 .throttle = whiteheat_throttle,
204 .unthrottle = whiteheat_unthrottle,
205 .read_bulk_callback = whiteheat_read_callback,
206 .write_bulk_callback = whiteheat_write_callback,
207};
208
209
210struct whiteheat_command_private {
211 struct mutex mutex;
212 __u8 port_running;
213 __u8 command_finished;
214 wait_queue_head_t wait_command;
215
216
217 __u8 result_buffer[64];
218};
219
220
221#define THROTTLED 0x01
222#define ACTUALLY_THROTTLED 0x02
223
224static int urb_pool_size = 8;
225
226struct whiteheat_urb_wrap {
227 struct list_head list;
228 struct urb *urb;
229};
230
231struct whiteheat_private {
232 spinlock_t lock;
233 __u8 flags;
234 __u8 mcr;
235 struct list_head rx_urbs_free;
236 struct list_head rx_urbs_submitted;
237 struct list_head rx_urb_q;
238 struct work_struct rx_work;
239 struct usb_serial_port *port;
240 struct list_head tx_urbs_free;
241 struct list_head tx_urbs_submitted;
242 struct mutex deathwarrant;
243};
244
245
246
247static int start_command_port(struct usb_serial *serial);
248static void stop_command_port(struct usb_serial *serial);
249static void command_port_write_callback(struct urb *urb);
250static void command_port_read_callback(struct urb *urb);
251
252static int start_port_read(struct usb_serial_port *port);
253static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
254 struct list_head *head);
255static struct list_head *list_first(struct list_head *head);
256static void rx_data_softint(struct work_struct *work);
257
258static int firm_send_command(struct usb_serial_port *port, __u8 command,
259 __u8 *data, __u8 datasize);
260static int firm_open(struct usb_serial_port *port);
261static int firm_close(struct usb_serial_port *port);
262static int firm_setup_port(struct tty_struct *tty);
263static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
264static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
265static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
266static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
267static int firm_get_dtr_rts(struct usb_serial_port *port);
268static int firm_report_tx_done(struct usb_serial_port *port);
269
270
271#define COMMAND_PORT 4
272#define COMMAND_TIMEOUT (2*HZ)
273#define COMMAND_TIMEOUT_MS 2000
274#define CLOSING_DELAY (30 * HZ)
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294static int whiteheat_firmware_download(struct usb_serial *serial,
295 const struct usb_device_id *id)
296{
297 int response, ret = -ENOENT;
298 const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
299 const struct ihex_binrec *record;
300
301 dbg("%s", __func__);
302
303 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
304 &serial->dev->dev)) {
305 dev_err(&serial->dev->dev,
306 "%s - request \"whiteheat.fw\" failed\n", __func__);
307 goto out;
308 }
309 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
310 &serial->dev->dev)) {
311 dev_err(&serial->dev->dev,
312 "%s - request \"whiteheat_loader.fw\" failed\n",
313 __func__);
314 goto out;
315 }
316 ret = 0;
317 response = ezusb_set_reset (serial, 1);
318
319 record = (const struct ihex_binrec *)loader_fw->data;
320 while (record) {
321 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
322 (unsigned char *)record->data,
323 be16_to_cpu(record->len), 0xa0);
324 if (response < 0) {
325 dev_err(&serial->dev->dev, "%s - ezusb_writememory "
326 "failed for loader (%d %04X %p %d)\n",
327 __func__, response, be32_to_cpu(record->addr),
328 record->data, be16_to_cpu(record->len));
329 break;
330 }
331 record = ihex_next_binrec(record);
332 }
333
334 response = ezusb_set_reset(serial, 0);
335
336 record = (const struct ihex_binrec *)firmware_fw->data;
337 while (record && be32_to_cpu(record->addr) < 0x1b40)
338 record = ihex_next_binrec(record);
339 while (record) {
340 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
341 (unsigned char *)record->data,
342 be16_to_cpu(record->len), 0xa3);
343 if (response < 0) {
344 dev_err(&serial->dev->dev, "%s - ezusb_writememory "
345 "failed for first firmware step "
346 "(%d %04X %p %d)\n", __func__, response,
347 be32_to_cpu(record->addr), record->data,
348 be16_to_cpu(record->len));
349 break;
350 }
351 ++record;
352 }
353
354 response = ezusb_set_reset(serial, 1);
355
356 record = (const struct ihex_binrec *)firmware_fw->data;
357 while (record && be32_to_cpu(record->addr) < 0x1b40) {
358 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
359 (unsigned char *)record->data,
360 be16_to_cpu(record->len), 0xa0);
361 if (response < 0) {
362 dev_err(&serial->dev->dev, "%s - ezusb_writememory "
363 "failed for second firmware step "
364 "(%d %04X %p %d)\n", __func__, response,
365 be32_to_cpu(record->addr), record->data,
366 be16_to_cpu(record->len));
367 break;
368 }
369 ++record;
370 }
371 ret = 0;
372 response = ezusb_set_reset (serial, 0);
373 out:
374 release_firmware(loader_fw);
375 release_firmware(firmware_fw);
376 return ret;
377}
378
379
380static int whiteheat_firmware_attach(struct usb_serial *serial)
381{
382
383 return 1;
384}
385
386
387
388
389
390static int whiteheat_attach(struct usb_serial *serial)
391{
392 struct usb_serial_port *command_port;
393 struct whiteheat_command_private *command_info;
394 struct usb_serial_port *port;
395 struct whiteheat_private *info;
396 struct whiteheat_hw_info *hw_info;
397 int pipe;
398 int ret;
399 int alen;
400 __u8 *command;
401 __u8 *result;
402 int i;
403 int j;
404 struct urb *urb;
405 int buf_size;
406 struct whiteheat_urb_wrap *wrap;
407 struct list_head *tmp;
408
409 command_port = serial->port[COMMAND_PORT];
410
411 pipe = usb_sndbulkpipe(serial->dev,
412 command_port->bulk_out_endpointAddress);
413 command = kmalloc(2, GFP_KERNEL);
414 if (!command)
415 goto no_command_buffer;
416 command[0] = WHITEHEAT_GET_HW_INFO;
417 command[1] = 0;
418
419 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
420 if (!result)
421 goto no_result_buffer;
422
423
424
425
426
427 usb_clear_halt(serial->dev, pipe);
428 ret = usb_bulk_msg(serial->dev, pipe, command, 2,
429 &alen, COMMAND_TIMEOUT_MS);
430 if (ret) {
431 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
432 serial->type->description, ret);
433 goto no_firmware;
434 } else if (alen != 2) {
435 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
436 serial->type->description, alen);
437 goto no_firmware;
438 }
439
440 pipe = usb_rcvbulkpipe(serial->dev,
441 command_port->bulk_in_endpointAddress);
442
443 usb_clear_halt(serial->dev, pipe);
444 ret = usb_bulk_msg(serial->dev, pipe, result,
445 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
446 if (ret) {
447 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
448 serial->type->description, ret);
449 goto no_firmware;
450 } else if (alen != sizeof(*hw_info) + 1) {
451 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
452 serial->type->description, alen);
453 goto no_firmware;
454 } else if (result[0] != command[0]) {
455 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
456 serial->type->description, result[0]);
457 goto no_firmware;
458 }
459
460 hw_info = (struct whiteheat_hw_info *)&result[1];
461
462 dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n",
463 serial->type->description, DRIVER_VERSION,
464 hw_info->sw_major_rev, hw_info->sw_minor_rev);
465
466 for (i = 0; i < serial->num_ports; i++) {
467 port = serial->port[i];
468
469 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
470 if (info == NULL) {
471 dev_err(&port->dev,
472 "%s: Out of memory for port structures\n",
473 serial->type->description);
474 goto no_private;
475 }
476
477 spin_lock_init(&info->lock);
478 mutex_init(&info->deathwarrant);
479 info->flags = 0;
480 info->mcr = 0;
481 INIT_WORK(&info->rx_work, rx_data_softint);
482 info->port = port;
483
484 INIT_LIST_HEAD(&info->rx_urbs_free);
485 INIT_LIST_HEAD(&info->rx_urbs_submitted);
486 INIT_LIST_HEAD(&info->rx_urb_q);
487 INIT_LIST_HEAD(&info->tx_urbs_free);
488 INIT_LIST_HEAD(&info->tx_urbs_submitted);
489
490 for (j = 0; j < urb_pool_size; j++) {
491 urb = usb_alloc_urb(0, GFP_KERNEL);
492 if (!urb) {
493 dev_err(&port->dev, "No free urbs available\n");
494 goto no_rx_urb;
495 }
496 buf_size = port->read_urb->transfer_buffer_length;
497 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
498 if (!urb->transfer_buffer) {
499 dev_err(&port->dev,
500 "Couldn't allocate urb buffer\n");
501 goto no_rx_buf;
502 }
503 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
504 if (!wrap) {
505 dev_err(&port->dev,
506 "Couldn't allocate urb wrapper\n");
507 goto no_rx_wrap;
508 }
509 usb_fill_bulk_urb(urb, serial->dev,
510 usb_rcvbulkpipe(serial->dev,
511 port->bulk_in_endpointAddress),
512 urb->transfer_buffer, buf_size,
513 whiteheat_read_callback, port);
514 wrap->urb = urb;
515 list_add(&wrap->list, &info->rx_urbs_free);
516
517 urb = usb_alloc_urb(0, GFP_KERNEL);
518 if (!urb) {
519 dev_err(&port->dev, "No free urbs available\n");
520 goto no_tx_urb;
521 }
522 buf_size = port->write_urb->transfer_buffer_length;
523 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
524 if (!urb->transfer_buffer) {
525 dev_err(&port->dev,
526 "Couldn't allocate urb buffer\n");
527 goto no_tx_buf;
528 }
529 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
530 if (!wrap) {
531 dev_err(&port->dev,
532 "Couldn't allocate urb wrapper\n");
533 goto no_tx_wrap;
534 }
535 usb_fill_bulk_urb(urb, serial->dev,
536 usb_sndbulkpipe(serial->dev,
537 port->bulk_out_endpointAddress),
538 urb->transfer_buffer, buf_size,
539 whiteheat_write_callback, port);
540 wrap->urb = urb;
541 list_add(&wrap->list, &info->tx_urbs_free);
542 }
543
544 usb_set_serial_port_data(port, info);
545 }
546
547 command_info = kmalloc(sizeof(struct whiteheat_command_private),
548 GFP_KERNEL);
549 if (command_info == NULL) {
550 dev_err(&serial->dev->dev,
551 "%s: Out of memory for port structures\n",
552 serial->type->description);
553 goto no_command_private;
554 }
555
556 mutex_init(&command_info->mutex);
557 command_info->port_running = 0;
558 init_waitqueue_head(&command_info->wait_command);
559 usb_set_serial_port_data(command_port, command_info);
560 command_port->write_urb->complete = command_port_write_callback;
561 command_port->read_urb->complete = command_port_read_callback;
562 kfree(result);
563 kfree(command);
564
565 return 0;
566
567no_firmware:
568
569 dev_err(&serial->dev->dev,
570 "%s: Unable to retrieve firmware version, try replugging\n",
571 serial->type->description);
572 dev_err(&serial->dev->dev,
573 "%s: If the firmware is not running (status led not blinking)\n",
574 serial->type->description);
575 dev_err(&serial->dev->dev,
576 "%s: please contact support@connecttech.com\n",
577 serial->type->description);
578 kfree(result);
579 return -ENODEV;
580
581no_command_private:
582 for (i = serial->num_ports - 1; i >= 0; i--) {
583 port = serial->port[i];
584 info = usb_get_serial_port_data(port);
585 for (j = urb_pool_size - 1; j >= 0; j--) {
586 tmp = list_first(&info->tx_urbs_free);
587 list_del(tmp);
588 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
589 urb = wrap->urb;
590 kfree(wrap);
591no_tx_wrap:
592 kfree(urb->transfer_buffer);
593no_tx_buf:
594 usb_free_urb(urb);
595no_tx_urb:
596 tmp = list_first(&info->rx_urbs_free);
597 list_del(tmp);
598 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
599 urb = wrap->urb;
600 kfree(wrap);
601no_rx_wrap:
602 kfree(urb->transfer_buffer);
603no_rx_buf:
604 usb_free_urb(urb);
605no_rx_urb:
606 ;
607 }
608 kfree(info);
609no_private:
610 ;
611 }
612 kfree(result);
613no_result_buffer:
614 kfree(command);
615no_command_buffer:
616 return -ENOMEM;
617}
618
619
620static void whiteheat_release(struct usb_serial *serial)
621{
622 struct usb_serial_port *command_port;
623 struct usb_serial_port *port;
624 struct whiteheat_private *info;
625 struct whiteheat_urb_wrap *wrap;
626 struct urb *urb;
627 struct list_head *tmp;
628 struct list_head *tmp2;
629 int i;
630
631 dbg("%s", __func__);
632
633
634 command_port = serial->port[COMMAND_PORT];
635 kfree(usb_get_serial_port_data(command_port));
636
637 for (i = 0; i < serial->num_ports; i++) {
638 port = serial->port[i];
639 info = usb_get_serial_port_data(port);
640 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
641 list_del(tmp);
642 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
643 urb = wrap->urb;
644 kfree(wrap);
645 kfree(urb->transfer_buffer);
646 usb_free_urb(urb);
647 }
648 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
649 list_del(tmp);
650 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
651 urb = wrap->urb;
652 kfree(wrap);
653 kfree(urb->transfer_buffer);
654 usb_free_urb(urb);
655 }
656 kfree(info);
657 }
658
659 return;
660}
661
662static int whiteheat_open(struct tty_struct *tty,
663 struct usb_serial_port *port, struct file *filp)
664{
665 int retval = 0;
666
667 dbg("%s - port %d", __func__, port->number);
668
669 retval = start_command_port(port->serial);
670 if (retval)
671 goto exit;
672
673 if (tty)
674 tty->low_latency = 1;
675
676
677 retval = firm_open(port);
678 if (retval) {
679 stop_command_port(port->serial);
680 goto exit;
681 }
682
683 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
684 if (retval) {
685 firm_close(port);
686 stop_command_port(port->serial);
687 goto exit;
688 }
689
690 if (tty)
691 firm_setup_port(tty);
692
693
694 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
695 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
696
697
698 retval = start_port_read(port);
699 if (retval) {
700 dev_err(&port->dev,
701 "%s - failed submitting read urb, error %d\n",
702 __func__, retval);
703 firm_close(port);
704 stop_command_port(port->serial);
705 goto exit;
706 }
707
708exit:
709 dbg("%s - exit, retval = %d", __func__, retval);
710 return retval;
711}
712
713
714static void whiteheat_close(struct usb_serial_port *port)
715{
716 struct whiteheat_private *info = usb_get_serial_port_data(port);
717 struct whiteheat_urb_wrap *wrap;
718 struct urb *urb;
719 struct list_head *tmp;
720 struct list_head *tmp2;
721
722 dbg("%s - port %d", __func__, port->number);
723
724 firm_report_tx_done(port);
725 firm_close(port);
726
727
728 mutex_lock(&info->deathwarrant);
729 spin_lock_irq(&info->lock);
730 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
731 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
732 urb = wrap->urb;
733 list_del(tmp);
734 spin_unlock_irq(&info->lock);
735 usb_kill_urb(urb);
736 spin_lock_irq(&info->lock);
737 list_add(tmp, &info->rx_urbs_free);
738 }
739 list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
740 list_move(tmp, &info->rx_urbs_free);
741 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
742 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
743 urb = wrap->urb;
744 list_del(tmp);
745 spin_unlock_irq(&info->lock);
746 usb_kill_urb(urb);
747 spin_lock_irq(&info->lock);
748 list_add(tmp, &info->tx_urbs_free);
749 }
750 spin_unlock_irq(&info->lock);
751 mutex_unlock(&info->deathwarrant);
752 stop_command_port(port->serial);
753}
754
755
756static int whiteheat_write(struct tty_struct *tty,
757 struct usb_serial_port *port, const unsigned char *buf, int count)
758{
759 struct usb_serial *serial = port->serial;
760 struct whiteheat_private *info = usb_get_serial_port_data(port);
761 struct whiteheat_urb_wrap *wrap;
762 struct urb *urb;
763 int result;
764 int bytes;
765 int sent = 0;
766 unsigned long flags;
767 struct list_head *tmp;
768
769 dbg("%s - port %d", __func__, port->number);
770
771 if (count == 0) {
772 dbg("%s - write request of 0 bytes", __func__);
773 return (0);
774 }
775
776 while (count) {
777 spin_lock_irqsave(&info->lock, flags);
778 if (list_empty(&info->tx_urbs_free)) {
779 spin_unlock_irqrestore(&info->lock, flags);
780 break;
781 }
782 tmp = list_first(&info->tx_urbs_free);
783 list_del(tmp);
784 spin_unlock_irqrestore(&info->lock, flags);
785
786 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
787 urb = wrap->urb;
788 bytes = (count > port->bulk_out_size) ?
789 port->bulk_out_size : count;
790 memcpy(urb->transfer_buffer, buf + sent, bytes);
791
792 usb_serial_debug_data(debug, &port->dev,
793 __func__, bytes, urb->transfer_buffer);
794
795 urb->dev = serial->dev;
796 urb->transfer_buffer_length = bytes;
797 result = usb_submit_urb(urb, GFP_ATOMIC);
798 if (result) {
799 dev_err(&port->dev,
800 "%s - failed submitting write urb, error %d\n",
801 __func__, result);
802 sent = result;
803 spin_lock_irqsave(&info->lock, flags);
804 list_add(tmp, &info->tx_urbs_free);
805 spin_unlock_irqrestore(&info->lock, flags);
806 break;
807 } else {
808 sent += bytes;
809 count -= bytes;
810 spin_lock_irqsave(&info->lock, flags);
811 list_add(tmp, &info->tx_urbs_submitted);
812 spin_unlock_irqrestore(&info->lock, flags);
813 }
814 }
815
816 return sent;
817}
818
819static int whiteheat_write_room(struct tty_struct *tty)
820{
821 struct usb_serial_port *port = tty->driver_data;
822 struct whiteheat_private *info = usb_get_serial_port_data(port);
823 struct list_head *tmp;
824 int room = 0;
825 unsigned long flags;
826
827 dbg("%s - port %d", __func__, port->number);
828
829 spin_lock_irqsave(&info->lock, flags);
830 list_for_each(tmp, &info->tx_urbs_free)
831 room++;
832 spin_unlock_irqrestore(&info->lock, flags);
833 room *= port->bulk_out_size;
834
835 dbg("%s - returns %d", __func__, room);
836 return (room);
837}
838
839static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file)
840{
841 struct usb_serial_port *port = tty->driver_data;
842 struct whiteheat_private *info = usb_get_serial_port_data(port);
843 unsigned int modem_signals = 0;
844
845 dbg("%s - port %d", __func__, port->number);
846
847 firm_get_dtr_rts(port);
848 if (info->mcr & UART_MCR_DTR)
849 modem_signals |= TIOCM_DTR;
850 if (info->mcr & UART_MCR_RTS)
851 modem_signals |= TIOCM_RTS;
852
853 return modem_signals;
854}
855
856static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
857 unsigned int set, unsigned int clear)
858{
859 struct usb_serial_port *port = tty->driver_data;
860 struct whiteheat_private *info = usb_get_serial_port_data(port);
861
862 dbg("%s - port %d", __func__, port->number);
863
864 if (set & TIOCM_RTS)
865 info->mcr |= UART_MCR_RTS;
866 if (set & TIOCM_DTR)
867 info->mcr |= UART_MCR_DTR;
868
869 if (clear & TIOCM_RTS)
870 info->mcr &= ~UART_MCR_RTS;
871 if (clear & TIOCM_DTR)
872 info->mcr &= ~UART_MCR_DTR;
873
874 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
875 firm_set_rts(port, info->mcr & UART_MCR_RTS);
876 return 0;
877}
878
879
880static int whiteheat_ioctl(struct tty_struct *tty, struct file *file,
881 unsigned int cmd, unsigned long arg)
882{
883 struct usb_serial_port *port = tty->driver_data;
884 struct serial_struct serstruct;
885 void __user *user_arg = (void __user *)arg;
886
887 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
888
889 switch (cmd) {
890 case TIOCGSERIAL:
891 memset(&serstruct, 0, sizeof(serstruct));
892 serstruct.type = PORT_16654;
893 serstruct.line = port->serial->minor;
894 serstruct.port = port->number;
895 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
896 serstruct.xmit_fifo_size = port->bulk_out_size;
897 serstruct.custom_divisor = 0;
898 serstruct.baud_base = 460800;
899 serstruct.close_delay = CLOSING_DELAY;
900 serstruct.closing_wait = CLOSING_DELAY;
901
902 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
903 return -EFAULT;
904 break;
905 default:
906 break;
907 }
908
909 return -ENOIOCTLCMD;
910}
911
912
913static void whiteheat_set_termios(struct tty_struct *tty,
914 struct usb_serial_port *port, struct ktermios *old_termios)
915{
916 firm_setup_port(tty);
917}
918
919static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
920{
921 struct usb_serial_port *port = tty->driver_data;
922 firm_set_break(port, break_state);
923}
924
925
926static int whiteheat_chars_in_buffer(struct tty_struct *tty)
927{
928 struct usb_serial_port *port = tty->driver_data;
929 struct whiteheat_private *info = usb_get_serial_port_data(port);
930 struct list_head *tmp;
931 struct whiteheat_urb_wrap *wrap;
932 int chars = 0;
933 unsigned long flags;
934
935 dbg("%s - port %d", __func__, port->number);
936
937 spin_lock_irqsave(&info->lock, flags);
938 list_for_each(tmp, &info->tx_urbs_submitted) {
939 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
940 chars += wrap->urb->transfer_buffer_length;
941 }
942 spin_unlock_irqrestore(&info->lock, flags);
943
944 dbg("%s - returns %d", __func__, chars);
945 return chars;
946}
947
948
949static void whiteheat_throttle(struct tty_struct *tty)
950{
951 struct usb_serial_port *port = tty->driver_data;
952 struct whiteheat_private *info = usb_get_serial_port_data(port);
953 unsigned long flags;
954
955 dbg("%s - port %d", __func__, port->number);
956
957 spin_lock_irqsave(&info->lock, flags);
958 info->flags |= THROTTLED;
959 spin_unlock_irqrestore(&info->lock, flags);
960
961 return;
962}
963
964
965static void whiteheat_unthrottle(struct tty_struct *tty)
966{
967 struct usb_serial_port *port = tty->driver_data;
968 struct whiteheat_private *info = usb_get_serial_port_data(port);
969 int actually_throttled;
970 unsigned long flags;
971
972 dbg("%s - port %d", __func__, port->number);
973
974 spin_lock_irqsave(&info->lock, flags);
975 actually_throttled = info->flags & ACTUALLY_THROTTLED;
976 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
977 spin_unlock_irqrestore(&info->lock, flags);
978
979 if (actually_throttled)
980 rx_data_softint(&info->rx_work);
981
982 return;
983}
984
985
986
987
988
989static void command_port_write_callback(struct urb *urb)
990{
991 int status = urb->status;
992
993 dbg("%s", __func__);
994
995 if (status) {
996 dbg("nonzero urb status: %d", status);
997 return;
998 }
999}
1000
1001
1002static void command_port_read_callback(struct urb *urb)
1003{
1004 struct usb_serial_port *command_port = urb->context;
1005 struct whiteheat_command_private *command_info;
1006 int status = urb->status;
1007 unsigned char *data = urb->transfer_buffer;
1008 int result;
1009
1010 dbg("%s", __func__);
1011
1012 command_info = usb_get_serial_port_data(command_port);
1013 if (!command_info) {
1014 dbg("%s - command_info is NULL, exiting.", __func__);
1015 return;
1016 }
1017 if (status) {
1018 dbg("%s - nonzero urb status: %d", __func__, status);
1019 if (status != -ENOENT)
1020 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1021 wake_up(&command_info->wait_command);
1022 return;
1023 }
1024
1025 usb_serial_debug_data(debug, &command_port->dev,
1026 __func__, urb->actual_length, data);
1027
1028 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1029 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1030 wake_up(&command_info->wait_command);
1031 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1032 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1033 wake_up(&command_info->wait_command);
1034 } else if (data[0] == WHITEHEAT_EVENT) {
1035
1036
1037 dbg("%s - event received", __func__);
1038 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1039 memcpy(command_info->result_buffer, &data[1],
1040 urb->actual_length - 1);
1041 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1042 wake_up(&command_info->wait_command);
1043 } else
1044 dbg("%s - bad reply from firmware", __func__);
1045
1046
1047 command_port->read_urb->dev = command_port->serial->dev;
1048 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1049 if (result)
1050 dbg("%s - failed resubmitting read urb, error %d",
1051 __func__, result);
1052}
1053
1054
1055static void whiteheat_read_callback(struct urb *urb)
1056{
1057 struct usb_serial_port *port = urb->context;
1058 struct whiteheat_urb_wrap *wrap;
1059 unsigned char *data = urb->transfer_buffer;
1060 struct whiteheat_private *info = usb_get_serial_port_data(port);
1061 int status = urb->status;
1062
1063 dbg("%s - port %d", __func__, port->number);
1064
1065 spin_lock(&info->lock);
1066 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1067 if (!wrap) {
1068 spin_unlock(&info->lock);
1069 dev_err(&port->dev, "%s - Not my urb!\n", __func__);
1070 return;
1071 }
1072 list_del(&wrap->list);
1073 spin_unlock(&info->lock);
1074
1075 if (status) {
1076 dbg("%s - nonzero read bulk status received: %d",
1077 __func__, status);
1078 spin_lock(&info->lock);
1079 list_add(&wrap->list, &info->rx_urbs_free);
1080 spin_unlock(&info->lock);
1081 return;
1082 }
1083
1084 usb_serial_debug_data(debug, &port->dev,
1085 __func__, urb->actual_length, data);
1086
1087 spin_lock(&info->lock);
1088 list_add_tail(&wrap->list, &info->rx_urb_q);
1089 if (info->flags & THROTTLED) {
1090 info->flags |= ACTUALLY_THROTTLED;
1091 spin_unlock(&info->lock);
1092 return;
1093 }
1094 spin_unlock(&info->lock);
1095
1096 schedule_work(&info->rx_work);
1097}
1098
1099
1100static void whiteheat_write_callback(struct urb *urb)
1101{
1102 struct usb_serial_port *port = urb->context;
1103 struct whiteheat_private *info = usb_get_serial_port_data(port);
1104 struct whiteheat_urb_wrap *wrap;
1105 int status = urb->status;
1106
1107 dbg("%s - port %d", __func__, port->number);
1108
1109 spin_lock(&info->lock);
1110 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1111 if (!wrap) {
1112 spin_unlock(&info->lock);
1113 dev_err(&port->dev, "%s - Not my urb!\n", __func__);
1114 return;
1115 }
1116 list_move(&wrap->list, &info->tx_urbs_free);
1117 spin_unlock(&info->lock);
1118
1119 if (status) {
1120 dbg("%s - nonzero write bulk status received: %d",
1121 __func__, status);
1122 return;
1123 }
1124
1125 usb_serial_port_softint(port);
1126}
1127
1128
1129
1130
1131
1132static int firm_send_command(struct usb_serial_port *port, __u8 command,
1133 __u8 *data, __u8 datasize)
1134{
1135 struct usb_serial_port *command_port;
1136 struct whiteheat_command_private *command_info;
1137 struct whiteheat_private *info;
1138 __u8 *transfer_buffer;
1139 int retval = 0;
1140 int t;
1141
1142 dbg("%s - command %d", __func__, command);
1143
1144 command_port = port->serial->port[COMMAND_PORT];
1145 command_info = usb_get_serial_port_data(command_port);
1146 mutex_lock(&command_info->mutex);
1147 command_info->command_finished = false;
1148
1149 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1150 transfer_buffer[0] = command;
1151 memcpy(&transfer_buffer[1], data, datasize);
1152 command_port->write_urb->transfer_buffer_length = datasize + 1;
1153 command_port->write_urb->dev = port->serial->dev;
1154 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
1155 if (retval) {
1156 dbg("%s - submit urb failed", __func__);
1157 goto exit;
1158 }
1159
1160
1161 t = wait_event_timeout(command_info->wait_command,
1162 (bool)command_info->command_finished, COMMAND_TIMEOUT);
1163 if (!t)
1164 usb_kill_urb(command_port->write_urb);
1165
1166 if (command_info->command_finished == false) {
1167 dbg("%s - command timed out.", __func__);
1168 retval = -ETIMEDOUT;
1169 goto exit;
1170 }
1171
1172 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1173 dbg("%s - command failed.", __func__);
1174 retval = -EIO;
1175 goto exit;
1176 }
1177
1178 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1179 dbg("%s - command completed.", __func__);
1180 switch (command) {
1181 case WHITEHEAT_GET_DTR_RTS:
1182 info = usb_get_serial_port_data(port);
1183 memcpy(&info->mcr, command_info->result_buffer,
1184 sizeof(struct whiteheat_dr_info));
1185 break;
1186 }
1187 }
1188exit:
1189 mutex_unlock(&command_info->mutex);
1190 return retval;
1191}
1192
1193
1194static int firm_open(struct usb_serial_port *port)
1195{
1196 struct whiteheat_simple open_command;
1197
1198 open_command.port = port->number - port->serial->minor + 1;
1199 return firm_send_command(port, WHITEHEAT_OPEN,
1200 (__u8 *)&open_command, sizeof(open_command));
1201}
1202
1203
1204static int firm_close(struct usb_serial_port *port)
1205{
1206 struct whiteheat_simple close_command;
1207
1208 close_command.port = port->number - port->serial->minor + 1;
1209 return firm_send_command(port, WHITEHEAT_CLOSE,
1210 (__u8 *)&close_command, sizeof(close_command));
1211}
1212
1213
1214static int firm_setup_port(struct tty_struct *tty)
1215{
1216 struct usb_serial_port *port = tty->driver_data;
1217 struct whiteheat_port_settings port_settings;
1218 unsigned int cflag = tty->termios->c_cflag;
1219
1220 port_settings.port = port->number + 1;
1221
1222
1223 switch (cflag & CSIZE) {
1224 case CS5: port_settings.bits = 5; break;
1225 case CS6: port_settings.bits = 6; break;
1226 case CS7: port_settings.bits = 7; break;
1227 default:
1228 case CS8: port_settings.bits = 8; break;
1229 }
1230 dbg("%s - data bits = %d", __func__, port_settings.bits);
1231
1232
1233 if (cflag & PARENB)
1234 if (cflag & CMSPAR)
1235 if (cflag & PARODD)
1236 port_settings.parity = WHITEHEAT_PAR_MARK;
1237 else
1238 port_settings.parity = WHITEHEAT_PAR_SPACE;
1239 else
1240 if (cflag & PARODD)
1241 port_settings.parity = WHITEHEAT_PAR_ODD;
1242 else
1243 port_settings.parity = WHITEHEAT_PAR_EVEN;
1244 else
1245 port_settings.parity = WHITEHEAT_PAR_NONE;
1246 dbg("%s - parity = %c", __func__, port_settings.parity);
1247
1248
1249 if (cflag & CSTOPB)
1250 port_settings.stop = 2;
1251 else
1252 port_settings.stop = 1;
1253 dbg("%s - stop bits = %d", __func__, port_settings.stop);
1254
1255
1256 if (cflag & CRTSCTS)
1257 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
1258 WHITEHEAT_HFLOW_RTS);
1259 else
1260 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1261 dbg("%s - hardware flow control = %s %s %s %s", __func__,
1262 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1263 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1264 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1265 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1266
1267
1268 if (I_IXOFF(tty))
1269 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1270 else
1271 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1272 dbg("%s - software flow control = %c", __func__, port_settings.sflow);
1273
1274 port_settings.xon = START_CHAR(tty);
1275 port_settings.xoff = STOP_CHAR(tty);
1276 dbg("%s - XON = %2x, XOFF = %2x",
1277 __func__, port_settings.xon, port_settings.xoff);
1278
1279
1280 port_settings.baud = tty_get_baud_rate(tty);
1281 dbg("%s - baud rate = %d", __func__, port_settings.baud);
1282
1283
1284 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
1285
1286 port_settings.lloop = 0;
1287
1288
1289 return firm_send_command(port, WHITEHEAT_SETUP_PORT,
1290 (__u8 *)&port_settings, sizeof(port_settings));
1291}
1292
1293
1294static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
1295{
1296 struct whiteheat_set_rdb rts_command;
1297
1298 rts_command.port = port->number - port->serial->minor + 1;
1299 rts_command.state = onoff;
1300 return firm_send_command(port, WHITEHEAT_SET_RTS,
1301 (__u8 *)&rts_command, sizeof(rts_command));
1302}
1303
1304
1305static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
1306{
1307 struct whiteheat_set_rdb dtr_command;
1308
1309 dtr_command.port = port->number - port->serial->minor + 1;
1310 dtr_command.state = onoff;
1311 return firm_send_command(port, WHITEHEAT_SET_DTR,
1312 (__u8 *)&dtr_command, sizeof(dtr_command));
1313}
1314
1315
1316static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
1317{
1318 struct whiteheat_set_rdb break_command;
1319
1320 break_command.port = port->number - port->serial->minor + 1;
1321 break_command.state = onoff;
1322 return firm_send_command(port, WHITEHEAT_SET_BREAK,
1323 (__u8 *)&break_command, sizeof(break_command));
1324}
1325
1326
1327static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
1328{
1329 struct whiteheat_purge purge_command;
1330
1331 purge_command.port = port->number - port->serial->minor + 1;
1332 purge_command.what = rxtx;
1333 return firm_send_command(port, WHITEHEAT_PURGE,
1334 (__u8 *)&purge_command, sizeof(purge_command));
1335}
1336
1337
1338static int firm_get_dtr_rts(struct usb_serial_port *port)
1339{
1340 struct whiteheat_simple get_dr_command;
1341
1342 get_dr_command.port = port->number - port->serial->minor + 1;
1343 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
1344 (__u8 *)&get_dr_command, sizeof(get_dr_command));
1345}
1346
1347
1348static int firm_report_tx_done(struct usb_serial_port *port)
1349{
1350 struct whiteheat_simple close_command;
1351
1352 close_command.port = port->number - port->serial->minor + 1;
1353 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
1354 (__u8 *)&close_command, sizeof(close_command));
1355}
1356
1357
1358
1359
1360
1361static int start_command_port(struct usb_serial *serial)
1362{
1363 struct usb_serial_port *command_port;
1364 struct whiteheat_command_private *command_info;
1365 int retval = 0;
1366
1367 command_port = serial->port[COMMAND_PORT];
1368 command_info = usb_get_serial_port_data(command_port);
1369 mutex_lock(&command_info->mutex);
1370 if (!command_info->port_running) {
1371
1372 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1373
1374 command_port->read_urb->dev = serial->dev;
1375 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1376 if (retval) {
1377 dev_err(&serial->dev->dev,
1378 "%s - failed submitting read urb, error %d\n",
1379 __func__, retval);
1380 goto exit;
1381 }
1382 }
1383 command_info->port_running++;
1384
1385exit:
1386 mutex_unlock(&command_info->mutex);
1387 return retval;
1388}
1389
1390
1391static void stop_command_port(struct usb_serial *serial)
1392{
1393 struct usb_serial_port *command_port;
1394 struct whiteheat_command_private *command_info;
1395
1396 command_port = serial->port[COMMAND_PORT];
1397 command_info = usb_get_serial_port_data(command_port);
1398 mutex_lock(&command_info->mutex);
1399 command_info->port_running--;
1400 if (!command_info->port_running)
1401 usb_kill_urb(command_port->read_urb);
1402 mutex_unlock(&command_info->mutex);
1403}
1404
1405
1406static int start_port_read(struct usb_serial_port *port)
1407{
1408 struct whiteheat_private *info = usb_get_serial_port_data(port);
1409 struct whiteheat_urb_wrap *wrap;
1410 struct urb *urb;
1411 int retval = 0;
1412 unsigned long flags;
1413 struct list_head *tmp;
1414 struct list_head *tmp2;
1415
1416 spin_lock_irqsave(&info->lock, flags);
1417
1418 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1419 list_del(tmp);
1420 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1421 urb = wrap->urb;
1422 urb->dev = port->serial->dev;
1423 spin_unlock_irqrestore(&info->lock, flags);
1424 retval = usb_submit_urb(urb, GFP_KERNEL);
1425 if (retval) {
1426 spin_lock_irqsave(&info->lock, flags);
1427 list_add(tmp, &info->rx_urbs_free);
1428 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1429 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1430 urb = wrap->urb;
1431 list_del(tmp);
1432 spin_unlock_irqrestore(&info->lock, flags);
1433 usb_kill_urb(urb);
1434 spin_lock_irqsave(&info->lock, flags);
1435 list_add(tmp, &info->rx_urbs_free);
1436 }
1437 break;
1438 }
1439 spin_lock_irqsave(&info->lock, flags);
1440 list_add(tmp, &info->rx_urbs_submitted);
1441 }
1442
1443 spin_unlock_irqrestore(&info->lock, flags);
1444
1445 return retval;
1446}
1447
1448
1449static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
1450 struct list_head *head)
1451{
1452 struct whiteheat_urb_wrap *wrap;
1453 struct list_head *tmp;
1454
1455 list_for_each(tmp, head) {
1456 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1457 if (wrap->urb == urb)
1458 return wrap;
1459 }
1460
1461 return NULL;
1462}
1463
1464
1465static struct list_head *list_first(struct list_head *head)
1466{
1467 return head->next;
1468}
1469
1470
1471static void rx_data_softint(struct work_struct *work)
1472{
1473 struct whiteheat_private *info =
1474 container_of(work, struct whiteheat_private, rx_work);
1475 struct usb_serial_port *port = info->port;
1476 struct tty_struct *tty = tty_port_tty_get(&port->port);
1477 struct whiteheat_urb_wrap *wrap;
1478 struct urb *urb;
1479 unsigned long flags;
1480 struct list_head *tmp;
1481 struct list_head *tmp2;
1482 int result;
1483 int sent = 0;
1484
1485 spin_lock_irqsave(&info->lock, flags);
1486 if (info->flags & THROTTLED) {
1487 spin_unlock_irqrestore(&info->lock, flags);
1488 goto out;
1489 }
1490
1491 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1492 list_del(tmp);
1493 spin_unlock_irqrestore(&info->lock, flags);
1494
1495 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1496 urb = wrap->urb;
1497
1498 if (tty && urb->actual_length) {
1499 int len = tty_buffer_request_room(tty,
1500 urb->actual_length);
1501
1502 if (unlikely(len < urb->actual_length)) {
1503 spin_lock_irqsave(&info->lock, flags);
1504 list_add(tmp, &info->rx_urb_q);
1505 spin_unlock_irqrestore(&info->lock, flags);
1506 tty_flip_buffer_push(tty);
1507 schedule_work(&info->rx_work);
1508 goto out;
1509 }
1510 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1511 sent += len;
1512 }
1513
1514 urb->dev = port->serial->dev;
1515 result = usb_submit_urb(urb, GFP_ATOMIC);
1516 if (result) {
1517 dev_err(&port->dev,
1518 "%s - failed resubmitting read urb, error %d\n",
1519 __func__, result);
1520 spin_lock_irqsave(&info->lock, flags);
1521 list_add(tmp, &info->rx_urbs_free);
1522 continue;
1523 }
1524
1525 spin_lock_irqsave(&info->lock, flags);
1526 list_add(tmp, &info->rx_urbs_submitted);
1527 }
1528 spin_unlock_irqrestore(&info->lock, flags);
1529
1530 if (sent)
1531 tty_flip_buffer_push(tty);
1532out:
1533 tty_kref_put(tty);
1534}
1535
1536
1537
1538
1539
1540static int __init whiteheat_init(void)
1541{
1542 int retval;
1543 retval = usb_serial_register(&whiteheat_fake_device);
1544 if (retval)
1545 goto failed_fake_register;
1546 retval = usb_serial_register(&whiteheat_device);
1547 if (retval)
1548 goto failed_device_register;
1549 retval = usb_register(&whiteheat_driver);
1550 if (retval)
1551 goto failed_usb_register;
1552 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1553 DRIVER_DESC "\n");
1554 return 0;
1555failed_usb_register:
1556 usb_serial_deregister(&whiteheat_device);
1557failed_device_register:
1558 usb_serial_deregister(&whiteheat_fake_device);
1559failed_fake_register:
1560 return retval;
1561}
1562
1563
1564static void __exit whiteheat_exit(void)
1565{
1566 usb_deregister(&whiteheat_driver);
1567 usb_serial_deregister(&whiteheat_fake_device);
1568 usb_serial_deregister(&whiteheat_device);
1569}
1570
1571
1572module_init(whiteheat_init);
1573module_exit(whiteheat_exit);
1574
1575MODULE_AUTHOR(DRIVER_AUTHOR);
1576MODULE_DESCRIPTION(DRIVER_DESC);
1577MODULE_LICENSE("GPL");
1578
1579MODULE_FIRMWARE("whiteheat.fw");
1580MODULE_FIRMWARE("whiteheat_loader.fw");
1581
1582module_param(urb_pool_size, int, 0);
1583MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1584
1585module_param(debug, bool, S_IRUGO | S_IWUSR);
1586MODULE_PARM_DESC(debug, "Debug enabled or not");
1587
