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whiteheat: fix bugs found in the tidy and audit
[linux-2.6/mini2440.git] / drivers / usb / serial / whiteheat.c
blob05374b99a2f8c2567a2b710c2fde1ccc71b4cec1
1 /*
2 * USB ConnectTech WhiteHEAT driver
3 *
4 * Copyright (C) 2002
5 * Connect Tech Inc.
6 *
7 * Copyright (C) 1999 - 2001
8 * Greg Kroah-Hartman (greg@kroah.com)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * See Documentation/usb/usb-serial.txt for more information on using this
16 * driver
17 *
18 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
19 * Upgrade to full working driver
20 *
21 * (05/30/2001) gkh
22 * switched from using spinlock to a semaphore, which fixes lots of
23 * problems.
24 *
25 * (04/08/2001) gb
26 * Identify version on module load.
27 *
28 * 2001_Mar_19 gkh
29 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
30 * than once, and the got the proper usb_device_id table entries so
31 * the driver works again.
32 *
33 * (11/01/2000) Adam J. Richter
34 * usb_device_id table support
35 *
36 * (10/05/2000) gkh
37 * Fixed bug with urb->dev not being set properly, now that the usb
38 * core needs it.
39 *
40 * (10/03/2000) smd
41 * firmware is improved to guard against crap sent to device
42 * firmware now replies CMD_FAILURE on bad things
43 * read_callback fix you provided for private info struct
44 * command_finished now indicates success or fail
45 * setup_port struct now packed to avoid gcc padding
46 * firmware uses 1 based port numbering, driver now handles that
47 *
48 * (09/11/2000) gkh
49 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
50 *
51 * (07/19/2000) gkh
52 * Added module_init and module_exit functions to handle the fact that this
53 * driver is a loadable module now.
54 * Fixed bug with port->minor that was found by Al Borchers
55 *
56 * (07/04/2000) gkh
57 * Added support for port settings. Baud rate can now be changed. Line
58 * signals are not transferred to and from the tty layer yet, but things
59 * seem to be working well now.
60 *
61 * (05/04/2000) gkh
62 * First cut at open and close commands. Data can flow through the ports at
63 * default speeds now.
64 *
65 * (03/26/2000) gkh
66 * Split driver up into device specific pieces.
67 *
68 */
69
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" /* WhiteHEAT specific commands */
89
90 static int debug;
91
92 #ifndef CMSPAR
93 #define CMSPAR 0
94 #endif
95
96 /*
97 * Version Information
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 ID tables for whiteheat are unusual, because we want to different
109 things for different versions of the device. Eventually, this
110 will be doable from a single table. But, for now, we define two
111 separate ID tables, and then a third table that combines them
112 just for the purpose of exporting the autoloading information.
113 */
114 static struct usb_device_id id_table_std [] = {
115 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
116 { } /* Terminating entry */
117 };
118
119 static struct usb_device_id id_table_prerenumeration [] = {
120 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
121 { } /* Terminating entry */
122 };
123
124 static 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 { } /* Terminating entry */
128 };
129
130 MODULE_DEVICE_TABLE(usb, id_table_combined);
131
132 static 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 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
141 static int whiteheat_firmware_download(struct usb_serial *serial,
142 const struct usb_device_id *id);
143 static int whiteheat_firmware_attach(struct usb_serial *serial);
144
145 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
146 static int whiteheat_attach(struct usb_serial *serial);
147 static void whiteheat_shutdown(struct usb_serial *serial);
148 static int whiteheat_open(struct tty_struct *tty,
149 struct usb_serial_port *port, struct file *filp);
150 static void whiteheat_close(struct tty_struct *tty,
151 struct usb_serial_port *port, struct file *filp);
152 static int whiteheat_write(struct tty_struct *tty,
153 struct usb_serial_port *port,
154 const unsigned char *buf, int count);
155 static int whiteheat_write_room(struct tty_struct *tty);
156 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file,
157 unsigned int cmd, unsigned long arg);
158 static void whiteheat_set_termios(struct tty_struct *tty,
159 struct usb_serial_port *port, struct ktermios *old);
160 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file);
161 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
162 unsigned int set, unsigned int clear);
163 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
164 static int whiteheat_chars_in_buffer(struct tty_struct *tty);
165 static void whiteheat_throttle(struct tty_struct *tty);
166 static void whiteheat_unthrottle(struct tty_struct *tty);
167 static void whiteheat_read_callback(struct urb *urb);
168 static void whiteheat_write_callback(struct urb *urb);
169
170 static struct usb_serial_driver whiteheat_fake_device = {
171 .driver = {
172 .owner = THIS_MODULE,
173 .name = "whiteheatnofirm",
174 },
175 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
176 .usb_driver = &whiteheat_driver,
177 .id_table = id_table_prerenumeration,
178 .num_ports = 1,
179 .probe = whiteheat_firmware_download,
180 .attach = whiteheat_firmware_attach,
181 };
182
183 static struct usb_serial_driver whiteheat_device = {
184 .driver = {
185 .owner = THIS_MODULE,
186 .name = "whiteheat",
187 },
188 .description = "Connect Tech - WhiteHEAT",
189 .usb_driver = &whiteheat_driver,
190 .id_table = id_table_std,
191 .num_ports = 4,
192 .attach = whiteheat_attach,
193 .shutdown = whiteheat_shutdown,
194 .open = whiteheat_open,
195 .close = whiteheat_close,
196 .write = whiteheat_write,
197 .write_room = whiteheat_write_room,
198 .ioctl = whiteheat_ioctl,
199 .set_termios = whiteheat_set_termios,
200 .break_ctl = whiteheat_break_ctl,
201 .tiocmget = whiteheat_tiocmget,
202 .tiocmset = whiteheat_tiocmset,
203 .chars_in_buffer = whiteheat_chars_in_buffer,
204 .throttle = whiteheat_throttle,
205 .unthrottle = whiteheat_unthrottle,
206 .read_bulk_callback = whiteheat_read_callback,
207 .write_bulk_callback = whiteheat_write_callback,
208 };
209
210
211 struct whiteheat_command_private {
212 struct mutex mutex;
213 __u8 port_running;
214 __u8 command_finished;
215 wait_queue_head_t wait_command; /* for handling sleeping whilst
216 waiting for a command to
217 finish */
218 __u8 result_buffer[64];
219 };
220
221
222 #define THROTTLED 0x01
223 #define ACTUALLY_THROTTLED 0x02
224
225 static int urb_pool_size = 8;
226
227 struct whiteheat_urb_wrap {
228 struct list_head list;
229 struct urb *urb;
230 };
231
232 struct whiteheat_private {
233 spinlock_t lock;
234 __u8 flags;
235 __u8 mcr; /* FIXME: no locking on mcr */
236 struct list_head rx_urbs_free;
237 struct list_head rx_urbs_submitted;
238 struct list_head rx_urb_q;
239 struct work_struct rx_work;
240 struct usb_serial_port *port;
241 struct list_head tx_urbs_free;
242 struct list_head tx_urbs_submitted;
243 struct mutex deathwarrant;
244 };
245
246
247 /* local function prototypes */
248 static int start_command_port(struct usb_serial *serial);
249 static void stop_command_port(struct usb_serial *serial);
250 static void command_port_write_callback(struct urb *urb);
251 static void command_port_read_callback(struct urb *urb);
252
253 static int start_port_read(struct usb_serial_port *port);
254 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
255 struct list_head *head);
256 static struct list_head *list_first(struct list_head *head);
257 static void rx_data_softint(struct work_struct *work);
258
259 static int firm_send_command(struct usb_serial_port *port, __u8 command,
260 __u8 *data, __u8 datasize);
261 static int firm_open(struct usb_serial_port *port);
262 static int firm_close(struct usb_serial_port *port);
263 static int firm_setup_port(struct tty_struct *tty);
264 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
265 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
266 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
267 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
268 static int firm_get_dtr_rts(struct usb_serial_port *port);
269 static int firm_report_tx_done(struct usb_serial_port *port);
270
271
272 #define COMMAND_PORT 4
273 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
274 #define COMMAND_TIMEOUT_MS 2000
275 #define CLOSING_DELAY (30 * HZ)
276
277
278 /*****************************************************************************
279 * Connect Tech's White Heat prerenumeration driver functions
280 *****************************************************************************/
281
282 /* steps to download the firmware to the WhiteHEAT device:
283 - hold the reset (by writing to the reset bit of the CPUCS register)
284 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
285 - release the reset (by writing to the CPUCS register)
286 - download the WH.HEX file for all addresses greater than 0x1b3f using
287 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
288 - hold the reset
289 - download the WH.HEX file for all addresses less than 0x1b40 using
290 VENDOR_REQUEST_ANCHOR_LOAD
291 - release the reset
292 - device renumerated itself and comes up as new device id with all
293 firmware download completed.
294 */
295 static int whiteheat_firmware_download(struct usb_serial *serial,
296 const struct usb_device_id *id)
297 {
298 int response, ret = -ENOENT;
299 const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
300 const struct ihex_binrec *record;
301
302 dbg("%s", __func__);
303
304 if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
305 &serial->dev->dev)) {
306 err("%s - request \"whiteheat.fw\" failed", __func__);
307 goto out;
308 }
309 if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
310 &serial->dev->dev)) {
311 err("%s - request \"whiteheat_loader.fw\" failed", __func__);
312 goto out;
313 }
314 ret = 0;
315 response = ezusb_set_reset (serial, 1);
316
317 record = (const struct ihex_binrec *)loader_fw->data;
318 while (record) {
319 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
320 (unsigned char *)record->data,
321 be16_to_cpu(record->len), 0xa0);
322 if (response < 0) {
323 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
324 __func__, response, be32_to_cpu(record->addr),
325 record->data, be16_to_cpu(record->len));
326 break;
327 }
328 record = ihex_next_binrec(record);
329 }
330
331 response = ezusb_set_reset(serial, 0);
332
333 record = (const struct ihex_binrec *)firmware_fw->data;
334 while (record && be32_to_cpu(record->addr) < 0x1b40)
335 record = ihex_next_binrec(record);
336 while (record) {
337 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
338 (unsigned char *)record->data,
339 be16_to_cpu(record->len), 0xa3);
340 if (response < 0) {
341 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
342 __func__, response, be32_to_cpu(record->addr),
343 record->data, be16_to_cpu(record->len));
344 break;
345 }
346 ++record;
347 }
348
349 response = ezusb_set_reset(serial, 1);
350
351 record = (const struct ihex_binrec *)firmware_fw->data;
352 while (record && be32_to_cpu(record->addr) < 0x1b40) {
353 response = ezusb_writememory (serial, be32_to_cpu(record->addr),
354 (unsigned char *)record->data,
355 be16_to_cpu(record->len), 0xa0);
356 if (response < 0) {
357 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
358 __func__, response, be32_to_cpu(record->addr),
359 record->data, be16_to_cpu(record->len));
360 break;
361 }
362 ++record;
363 }
364 ret = 0;
365 response = ezusb_set_reset (serial, 0);
366 out:
367 release_firmware(loader_fw);
368 release_firmware(firmware_fw);
369 return ret;
370 }
371
372
373 static int whiteheat_firmware_attach(struct usb_serial *serial)
374 {
375 /* We want this device to fail to have a driver assigned to it */
376 return 1;
377 }
378
379
380 /*****************************************************************************
381 * Connect Tech's White Heat serial driver functions
382 *****************************************************************************/
383 static int whiteheat_attach(struct usb_serial *serial)
384 {
385 struct usb_serial_port *command_port;
386 struct whiteheat_command_private *command_info;
387 struct usb_serial_port *port;
388 struct whiteheat_private *info;
389 struct whiteheat_hw_info *hw_info;
390 int pipe;
391 int ret;
392 int alen;
393 __u8 *command;
394 __u8 *result;
395 int i;
396 int j;
397 struct urb *urb;
398 int buf_size;
399 struct whiteheat_urb_wrap *wrap;
400 struct list_head *tmp;
401
402 command_port = serial->port[COMMAND_PORT];
403
404 pipe = usb_sndbulkpipe(serial->dev,
405 command_port->bulk_out_endpointAddress);
406 command = kmalloc(2, GFP_KERNEL);
407 if (!command)
408 goto no_command_buffer;
409 command[0] = WHITEHEAT_GET_HW_INFO;
410 command[1] = 0;
411
412 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
413 if (!result)
414 goto no_result_buffer;
415 /*
416 * When the module is reloaded the firmware is still there and
417 * the endpoints are still in the usb core unchanged. This is the
418 * unlinking bug in disguise. Same for the call below.
419 */
420 usb_clear_halt(serial->dev, pipe);
421 ret = usb_bulk_msg(serial->dev, pipe, command, 2,
422 &alen, COMMAND_TIMEOUT_MS);
423 if (ret) {
424 err("%s: Couldn't send command [%d]",
425 serial->type->description, ret);
426 goto no_firmware;
427 } else if (alen != 2) {
428 err("%s: Send command incomplete [%d]",
429 serial->type->description, alen);
430 goto no_firmware;
431 }
432
433 pipe = usb_rcvbulkpipe(serial->dev,
434 command_port->bulk_in_endpointAddress);
435 /* See the comment on the usb_clear_halt() above */
436 usb_clear_halt(serial->dev, pipe);
437 ret = usb_bulk_msg(serial->dev, pipe, result,
438 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
439 if (ret) {
440 err("%s: Couldn't get results [%d]",
441 serial->type->description, ret);
442 goto no_firmware;
443 } else if (alen != sizeof(*hw_info) + 1) {
444 err("%s: Get results incomplete [%d]",
445 serial->type->description, alen);
446 goto no_firmware;
447 } else if (result[0] != command[0]) {
448 err("%s: Command failed [%d]",
449 serial->type->description, result[0]);
450 goto no_firmware;
451 }
452
453 hw_info = (struct whiteheat_hw_info *)&result[1];
454
455 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
456 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
457
458 for (i = 0; i < serial->num_ports; i++) {
459 port = serial->port[i];
460
461 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
462 if (info == NULL) {
463 err("%s: Out of memory for port structures\n",
464 serial->type->description);
465 goto no_private;
466 }
467
468 spin_lock_init(&info->lock);
469 mutex_init(&info->deathwarrant);
470 info->flags = 0;
471 info->mcr = 0;
472 INIT_WORK(&info->rx_work, rx_data_softint);
473 info->port = port;
474
475 INIT_LIST_HEAD(&info->rx_urbs_free);
476 INIT_LIST_HEAD(&info->rx_urbs_submitted);
477 INIT_LIST_HEAD(&info->rx_urb_q);
478 INIT_LIST_HEAD(&info->tx_urbs_free);
479 INIT_LIST_HEAD(&info->tx_urbs_submitted);
480
481 for (j = 0; j < urb_pool_size; j++) {
482 urb = usb_alloc_urb(0, GFP_KERNEL);
483 if (!urb) {
484 err("No free urbs available");
485 goto no_rx_urb;
486 }
487 buf_size = port->read_urb->transfer_buffer_length;
488 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
489 if (!urb->transfer_buffer) {
490 err("Couldn't allocate urb buffer");
491 goto no_rx_buf;
492 }
493 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
494 if (!wrap) {
495 err("Couldn't allocate urb wrapper");
496 goto no_rx_wrap;
497 }
498 usb_fill_bulk_urb(urb, serial->dev,
499 usb_rcvbulkpipe(serial->dev,
500 port->bulk_in_endpointAddress),
501 urb->transfer_buffer, buf_size,
502 whiteheat_read_callback, port);
503 wrap->urb = urb;
504 list_add(&wrap->list, &info->rx_urbs_free);
505
506 urb = usb_alloc_urb(0, GFP_KERNEL);
507 if (!urb) {
508 err("No free urbs available");
509 goto no_tx_urb;
510 }
511 buf_size = port->write_urb->transfer_buffer_length;
512 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
513 if (!urb->transfer_buffer) {
514 err("Couldn't allocate urb buffer");
515 goto no_tx_buf;
516 }
517 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
518 if (!wrap) {
519 err("Couldn't allocate urb wrapper");
520 goto no_tx_wrap;
521 }
522 usb_fill_bulk_urb(urb, serial->dev,
523 usb_sndbulkpipe(serial->dev,
524 port->bulk_out_endpointAddress),
525 urb->transfer_buffer, buf_size,
526 whiteheat_write_callback, port);
527 wrap->urb = urb;
528 list_add(&wrap->list, &info->tx_urbs_free);
529 }
530
531 usb_set_serial_port_data(port, info);
532 }
533
534 command_info = kmalloc(sizeof(struct whiteheat_command_private),
535 GFP_KERNEL);
536 if (command_info == NULL) {
537 err("%s: Out of memory for port structures\n",
538 serial->type->description);
539 goto no_command_private;
540 }
541
542 mutex_init(&command_info->mutex);
543 command_info->port_running = 0;
544 init_waitqueue_head(&command_info->wait_command);
545 usb_set_serial_port_data(command_port, command_info);
546 command_port->write_urb->complete = command_port_write_callback;
547 command_port->read_urb->complete = command_port_read_callback;
548 kfree(result);
549 kfree(command);
550
551 return 0;
552
553 no_firmware:
554 /* Firmware likely not running */
555 err("%s: Unable to retrieve firmware version, try replugging\n",
556 serial->type->description);
557 err("%s: If the firmware is not running (status led not blinking)\n",
558 serial->type->description);
559 err("%s: please contact support@connecttech.com\n",
560 serial->type->description);
561 kfree(result);
562 return -ENODEV;
563
564 no_command_private:
565 for (i = serial->num_ports - 1; i >= 0; i--) {
566 port = serial->port[i];
567 info = usb_get_serial_port_data(port);
568 for (j = urb_pool_size - 1; j >= 0; j--) {
569 tmp = list_first(&info->tx_urbs_free);
570 list_del(tmp);
571 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
572 urb = wrap->urb;
573 kfree(wrap);
574 no_tx_wrap:
575 kfree(urb->transfer_buffer);
576 no_tx_buf:
577 usb_free_urb(urb);
578 no_tx_urb:
579 tmp = list_first(&info->rx_urbs_free);
580 list_del(tmp);
581 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
582 urb = wrap->urb;
583 kfree(wrap);
584 no_rx_wrap:
585 kfree(urb->transfer_buffer);
586 no_rx_buf:
587 usb_free_urb(urb);
588 no_rx_urb:
589 ;
590 }
591 kfree(info);
592 no_private:
593 ;
594 }
595 kfree(result);
596 no_result_buffer:
597 kfree(command);
598 no_command_buffer:
599 return -ENOMEM;
600 }
601
602
603 static void whiteheat_shutdown(struct usb_serial *serial)
604 {
605 struct usb_serial_port *command_port;
606 struct usb_serial_port *port;
607 struct whiteheat_private *info;
608 struct whiteheat_urb_wrap *wrap;
609 struct urb *urb;
610 struct list_head *tmp;
611 struct list_head *tmp2;
612 int i;
613
614 dbg("%s", __func__);
615
616 /* free up our private data for our command port */
617 command_port = serial->port[COMMAND_PORT];
618 kfree(usb_get_serial_port_data(command_port));
619
620 for (i = 0; i < serial->num_ports; i++) {
621 port = serial->port[i];
622 info = usb_get_serial_port_data(port);
623 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
624 list_del(tmp);
625 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
626 urb = wrap->urb;
627 kfree(wrap);
628 kfree(urb->transfer_buffer);
629 usb_free_urb(urb);
630 }
631 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
632 list_del(tmp);
633 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
634 urb = wrap->urb;
635 kfree(wrap);
636 kfree(urb->transfer_buffer);
637 usb_free_urb(urb);
638 }
639 kfree(info);
640 }
641
642 return;
643 }
644
645 static int whiteheat_open(struct tty_struct *tty,
646 struct usb_serial_port *port, struct file *filp)
647 {
648 int retval = 0;
649 struct ktermios old_term;
650
651 dbg("%s - port %d", __func__, port->number);
652
653 retval = start_command_port(port->serial);
654 if (retval)
655 goto exit;
656
657 if (tty)
658 tty->low_latency = 1;
659
660 /* send an open port command */
661 retval = firm_open(port);
662 if (retval) {
663 stop_command_port(port->serial);
664 goto exit;
665 }
666
667 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
668 if (retval) {
669 firm_close(port);
670 stop_command_port(port->serial);
671 goto exit;
672 }
673
674 if (tty)
675 firm_setup_port(tty);
676
677 /* Work around HCD bugs */
678 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
679 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
680
681 /* Start reading from the device */
682 retval = start_port_read(port);
683 if (retval) {
684 err("%s - failed submitting read urb, error %d",
685 __func__, retval);
686 firm_close(port);
687 stop_command_port(port->serial);
688 goto exit;
689 }
690
691 exit:
692 dbg("%s - exit, retval = %d", __func__, retval);
693 return retval;
694 }
695
696
697 static void whiteheat_close(struct tty_struct *tty,
698 struct usb_serial_port *port, struct file *filp)
699 {
700 struct whiteheat_private *info = usb_get_serial_port_data(port);
701 struct whiteheat_urb_wrap *wrap;
702 struct urb *urb;
703 struct list_head *tmp;
704 struct list_head *tmp2;
705
706 dbg("%s - port %d", __func__, port->number);
707
708 mutex_lock(&port->serial->disc_mutex);
709 /* filp is NULL when called from usb_serial_disconnect */
710 if ((filp && (tty_hung_up_p(filp))) || port->serial->disconnected) {
711 mutex_unlock(&port->serial->disc_mutex);
712 return;
713 }
714 mutex_unlock(&port->serial->disc_mutex);
715
716 tty->closing = 1;
717
718 /*
719 * Not currently in use; tty_wait_until_sent() calls
720 * serial_chars_in_buffer() which deadlocks on the second semaphore
721 * acquisition. This should be fixed at some point. Greg's been
722 * notified.
723 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
724 tty_wait_until_sent(tty, CLOSING_DELAY);
725 }
726 */
727
728 tty_driver_flush_buffer(tty);
729 tty_ldisc_flush(tty);
730
731 firm_report_tx_done(port);
732
733 firm_close(port);
734
735 /* shutdown our bulk reads and writes */
736 mutex_lock(&info->deathwarrant);
737 spin_lock_irq(&info->lock);
738 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
739 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
740 urb = wrap->urb;
741 list_del(tmp);
742 spin_unlock_irq(&info->lock);
743 usb_kill_urb(urb);
744 spin_lock_irq(&info->lock);
745 list_add(tmp, &info->rx_urbs_free);
746 }
747 list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
748 list_move(tmp, &info->rx_urbs_free);
749 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
750 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
751 urb = wrap->urb;
752 list_del(tmp);
753 spin_unlock_irq(&info->lock);
754 usb_kill_urb(urb);
755 spin_lock_irq(&info->lock);
756 list_add(tmp, &info->tx_urbs_free);
757 }
758 spin_unlock_irq(&info->lock);
759 mutex_unlock(&info->deathwarrant);
760
761 stop_command_port(port->serial);
762
763 tty->closing = 0;
764 }
765
766
767 static int whiteheat_write(struct tty_struct *tty,
768 struct usb_serial_port *port, const unsigned char *buf, int count)
769 {
770 struct usb_serial *serial = port->serial;
771 struct whiteheat_private *info = usb_get_serial_port_data(port);
772 struct whiteheat_urb_wrap *wrap;
773 struct urb *urb;
774 int result;
775 int bytes;
776 int sent = 0;
777 unsigned long flags;
778 struct list_head *tmp;
779
780 dbg("%s - port %d", __func__, port->number);
781
782 if (count == 0) {
783 dbg("%s - write request of 0 bytes", __func__);
784 return (0);
785 }
786
787 while (count) {
788 spin_lock_irqsave(&info->lock, flags);
789 if (list_empty(&info->tx_urbs_free)) {
790 spin_unlock_irqrestore(&info->lock, flags);
791 break;
792 }
793 tmp = list_first(&info->tx_urbs_free);
794 list_del(tmp);
795 spin_unlock_irqrestore(&info->lock, flags);
796
797 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
798 urb = wrap->urb;
799 bytes = (count > port->bulk_out_size) ?
800 port->bulk_out_size : count;
801 memcpy(urb->transfer_buffer, buf + sent, bytes);
802
803 usb_serial_debug_data(debug, &port->dev,
804 __func__, bytes, urb->transfer_buffer);
805
806 urb->dev = serial->dev;
807 urb->transfer_buffer_length = bytes;
808 result = usb_submit_urb(urb, GFP_ATOMIC);
809 if (result) {
810 err("%s - failed submitting write urb, error %d",
811 __func__, result);
812 sent = result;
813 spin_lock_irqsave(&info->lock, flags);
814 list_add(tmp, &info->tx_urbs_free);
815 spin_unlock_irqrestore(&info->lock, flags);
816 break;
817 } else {
818 sent += bytes;
819 count -= bytes;
820 spin_lock_irqsave(&info->lock, flags);
821 list_add(tmp, &info->tx_urbs_submitted);
822 spin_unlock_irqrestore(&info->lock, flags);
823 }
824 }
825
826 return sent;
827 }
828
829 static int whiteheat_write_room(struct tty_struct *tty)
830 {
831 struct usb_serial_port *port = tty->driver_data;
832 struct whiteheat_private *info = usb_get_serial_port_data(port);
833 struct list_head *tmp;
834 int room = 0;
835 unsigned long flags;
836
837 dbg("%s - port %d", __func__, port->number);
838
839 spin_lock_irqsave(&info->lock, flags);
840 list_for_each(tmp, &info->tx_urbs_free)
841 room++;
842 spin_unlock_irqrestore(&info->lock, flags);
843 room *= port->bulk_out_size;
844
845 dbg("%s - returns %d", __func__, room);
846 return (room);
847 }
848
849 static int whiteheat_tiocmget(struct tty_struct *tty, struct file *file)
850 {
851 struct usb_serial_port *port = tty->driver_data;
852 struct whiteheat_private *info = usb_get_serial_port_data(port);
853 unsigned int modem_signals = 0;
854
855 dbg("%s - port %d", __func__, port->number);
856
857 firm_get_dtr_rts(port);
858 if (info->mcr & UART_MCR_DTR)
859 modem_signals |= TIOCM_DTR;
860 if (info->mcr & UART_MCR_RTS)
861 modem_signals |= TIOCM_RTS;
862
863 return modem_signals;
864 }
865
866 static int whiteheat_tiocmset(struct tty_struct *tty, struct file *file,
867 unsigned int set, unsigned int clear)
868 {
869 struct usb_serial_port *port = tty->driver_data;
870 struct whiteheat_private *info = usb_get_serial_port_data(port);
871
872 dbg("%s - port %d", __func__, port->number);
873
874 if (set & TIOCM_RTS)
875 info->mcr |= UART_MCR_RTS;
876 if (set & TIOCM_DTR)
877 info->mcr |= UART_MCR_DTR;
878
879 if (clear & TIOCM_RTS)
880 info->mcr &= ~UART_MCR_RTS;
881 if (clear & TIOCM_DTR)
882 info->mcr &= ~UART_MCR_DTR;
883
884 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
885 firm_set_rts(port, info->mcr & UART_MCR_RTS);
886 return 0;
887 }
888
889
890 static int whiteheat_ioctl(struct tty_struct *tty, struct file *file,
891 unsigned int cmd, unsigned long arg)
892 {
893 struct usb_serial_port *port = tty->driver_data;
894 struct serial_struct serstruct;
895 void __user *user_arg = (void __user *)arg;
896
897 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
898
899 switch (cmd) {
900 case TIOCGSERIAL:
901 memset(&serstruct, 0, sizeof(serstruct));
902 serstruct.type = PORT_16654;
903 serstruct.line = port->serial->minor;
904 serstruct.port = port->number;
905 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
906 serstruct.xmit_fifo_size = port->bulk_out_size;
907 serstruct.custom_divisor = 0;
908 serstruct.baud_base = 460800;
909 serstruct.close_delay = CLOSING_DELAY;
910 serstruct.closing_wait = CLOSING_DELAY;
911
912 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
913 return -EFAULT;
914 break;
915 default:
916 break;
917 }
918
919 return -ENOIOCTLCMD;
920 }
921
922
923 static void whiteheat_set_termios(struct tty_struct *tty,
924 struct usb_serial_port *port, struct ktermios *old_termios)
925 {
926 firm_setup_port(tty);
927 }
928
929 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
930 {
931 struct usb_serial_port *port = tty->driver_data;
932 firm_set_break(port, break_state);
933 }
934
935
936 static int whiteheat_chars_in_buffer(struct tty_struct *tty)
937 {
938 struct usb_serial_port *port = tty->driver_data;
939 struct whiteheat_private *info = usb_get_serial_port_data(port);
940 struct list_head *tmp;
941 struct whiteheat_urb_wrap *wrap;
942 int chars = 0;
943 unsigned long flags;
944
945 dbg("%s - port %d", __func__, port->number);
946
947 spin_lock_irqsave(&info->lock, flags);
948 list_for_each(tmp, &info->tx_urbs_submitted) {
949 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
950 chars += wrap->urb->transfer_buffer_length;
951 }
952 spin_unlock_irqrestore(&info->lock, flags);
953
954 dbg("%s - returns %d", __func__, chars);
955 return chars;
956 }
957
958
959 static void whiteheat_throttle(struct tty_struct *tty)
960 {
961 struct usb_serial_port *port = tty->driver_data;
962 struct whiteheat_private *info = usb_get_serial_port_data(port);
963 unsigned long flags;
964
965 dbg("%s - port %d", __func__, port->number);
966
967 spin_lock_irqsave(&info->lock, flags);
968 info->flags |= THROTTLED;
969 spin_unlock_irqrestore(&info->lock, flags);
970
971 return;
972 }
973
974
975 static void whiteheat_unthrottle(struct tty_struct *tty)
976 {
977 struct usb_serial_port *port = tty->driver_data;
978 struct whiteheat_private *info = usb_get_serial_port_data(port);
979 int actually_throttled;
980 unsigned long flags;
981
982 dbg("%s - port %d", __func__, port->number);
983
984 spin_lock_irqsave(&info->lock, flags);
985 actually_throttled = info->flags & ACTUALLY_THROTTLED;
986 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
987 spin_unlock_irqrestore(&info->lock, flags);
988
989 if (actually_throttled)
990 rx_data_softint(&info->rx_work);
991
992 return;
993 }
994
995
996 /*****************************************************************************
997 * Connect Tech's White Heat callback routines
998 *****************************************************************************/
999 static void command_port_write_callback(struct urb *urb)
1000 {
1001 int status = urb->status;
1002
1003 dbg("%s", __func__);
1004
1005 if (status) {
1006 dbg("nonzero urb status: %d", status);
1007 return;
1008 }
1009 }
1010
1011
1012 static void command_port_read_callback(struct urb *urb)
1013 {
1014 struct usb_serial_port *command_port = urb->context;
1015 struct whiteheat_command_private *command_info;
1016 int status = urb->status;
1017 unsigned char *data = urb->transfer_buffer;
1018 int result;
1019
1020 dbg("%s", __func__);
1021
1022 command_info = usb_get_serial_port_data(command_port);
1023 if (!command_info) {
1024 dbg("%s - command_info is NULL, exiting.", __func__);
1025 return;
1026 }
1027 if (status) {
1028 dbg("%s - nonzero urb status: %d", __func__, status);
1029 if (status != -ENOENT)
1030 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1031 wake_up(&command_info->wait_command);
1032 return;
1033 }
1034
1035 usb_serial_debug_data(debug, &command_port->dev,
1036 __func__, urb->actual_length, data);
1037
1038 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1039 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1040 wake_up(&command_info->wait_command);
1041 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1042 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1043 wake_up(&command_info->wait_command);
1044 } else if (data[0] == WHITEHEAT_EVENT) {
1045 /* These are unsolicited reports from the firmware, hence no
1046 waiting command to wakeup */
1047 dbg("%s - event received", __func__);
1048 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1049 memcpy(command_info->result_buffer, &data[1],
1050 urb->actual_length - 1);
1051 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1052 wake_up(&command_info->wait_command);
1053 } else
1054 dbg("%s - bad reply from firmware", __func__);
1055
1056 /* Continue trying to always read */
1057 command_port->read_urb->dev = command_port->serial->dev;
1058 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1059 if (result)
1060 dbg("%s - failed resubmitting read urb, error %d",
1061 __func__, result);
1062 }
1063
1064
1065 static void whiteheat_read_callback(struct urb *urb)
1066 {
1067 struct usb_serial_port *port = urb->context;
1068 struct whiteheat_urb_wrap *wrap;
1069 unsigned char *data = urb->transfer_buffer;
1070 struct whiteheat_private *info = usb_get_serial_port_data(port);
1071 int status = urb->status;
1072
1073 dbg("%s - port %d", __func__, port->number);
1074
1075 spin_lock(&info->lock);
1076 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1077 if (!wrap) {
1078 spin_unlock(&info->lock);
1079 err("%s - Not my urb!", __func__);
1080 return;
1081 }
1082 list_del(&wrap->list);
1083 spin_unlock(&info->lock);
1084
1085 if (status) {
1086 dbg("%s - nonzero read bulk status received: %d",
1087 __func__, status);
1088 spin_lock(&info->lock);
1089 list_add(&wrap->list, &info->rx_urbs_free);
1090 spin_unlock(&info->lock);
1091 return;
1092 }
1093
1094 usb_serial_debug_data(debug, &port->dev,
1095 __func__, urb->actual_length, data);
1096
1097 spin_lock(&info->lock);
1098 list_add_tail(&wrap->list, &info->rx_urb_q);
1099 if (info->flags & THROTTLED) {
1100 info->flags |= ACTUALLY_THROTTLED;
1101 spin_unlock(&info->lock);
1102 return;
1103 }
1104 spin_unlock(&info->lock);
1105
1106 schedule_work(&info->rx_work);
1107 }
1108
1109
1110 static void whiteheat_write_callback(struct urb *urb)
1111 {
1112 struct usb_serial_port *port = urb->context;
1113 struct whiteheat_private *info = usb_get_serial_port_data(port);
1114 struct whiteheat_urb_wrap *wrap;
1115 int status = urb->status;
1116
1117 dbg("%s - port %d", __func__, port->number);
1118
1119 spin_lock(&info->lock);
1120 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1121 if (!wrap) {
1122 spin_unlock(&info->lock);
1123 err("%s - Not my urb!", __func__);
1124 return;
1125 }
1126 list_move(&wrap->list, &info->tx_urbs_free);
1127 spin_unlock(&info->lock);
1128
1129 if (status) {
1130 dbg("%s - nonzero write bulk status received: %d",
1131 __func__, status);
1132 return;
1133 }
1134
1135 usb_serial_port_softint(port);
1136 }
1137
1138
1139 /*****************************************************************************
1140 * Connect Tech's White Heat firmware interface
1141 *****************************************************************************/
1142 static int firm_send_command(struct usb_serial_port *port, __u8 command,
1143 __u8 *data, __u8 datasize)
1144 {
1145 struct usb_serial_port *command_port;
1146 struct whiteheat_command_private *command_info;
1147 struct whiteheat_private *info;
1148 __u8 *transfer_buffer;
1149 int retval = 0;
1150 int t;
1151
1152 dbg("%s - command %d", __func__, command);
1153
1154 command_port = port->serial->port[COMMAND_PORT];
1155 command_info = usb_get_serial_port_data(command_port);
1156 mutex_lock(&command_info->mutex);
1157 command_info->command_finished = false;
1158
1159 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1160 transfer_buffer[0] = command;
1161 memcpy(&transfer_buffer[1], data, datasize);
1162 command_port->write_urb->transfer_buffer_length = datasize + 1;
1163 command_port->write_urb->dev = port->serial->dev;
1164 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
1165 if (retval) {
1166 dbg("%s - submit urb failed", __func__);
1167 goto exit;
1168 }
1169
1170 /* wait for the command to complete */
1171 t = wait_event_timeout(command_info->wait_command,
1172 (bool)command_info->command_finished, COMMAND_TIMEOUT);
1173 if (!t)
1174 usb_kill_urb(command_port->write_urb);
1175
1176 if (command_info->command_finished == false) {
1177 dbg("%s - command timed out.", __func__);
1178 retval = -ETIMEDOUT;
1179 goto exit;
1180 }
1181
1182 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1183 dbg("%s - command failed.", __func__);
1184 retval = -EIO;
1185 goto exit;
1186 }
1187
1188 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1189 dbg("%s - command completed.", __func__);
1190 switch (command) {
1191 case WHITEHEAT_GET_DTR_RTS:
1192 info = usb_get_serial_port_data(port);
1193 memcpy(&info->mcr, command_info->result_buffer,
1194 sizeof(struct whiteheat_dr_info));
1195 break;
1196 }
1197 }
1198 exit:
1199 mutex_unlock(&command_info->mutex);
1200 return retval;
1201 }
1202
1203
1204 static int firm_open(struct usb_serial_port *port)
1205 {
1206 struct whiteheat_simple open_command;
1207
1208 open_command.port = port->number - port->serial->minor + 1;
1209 return firm_send_command(port, WHITEHEAT_OPEN,
1210 (__u8 *)&open_command, sizeof(open_command));
1211 }
1212
1213
1214 static int firm_close(struct usb_serial_port *port)
1215 {
1216 struct whiteheat_simple close_command;
1217
1218 close_command.port = port->number - port->serial->minor + 1;
1219 return firm_send_command(port, WHITEHEAT_CLOSE,
1220 (__u8 *)&close_command, sizeof(close_command));
1221 }
1222
1223
1224 static int firm_setup_port(struct tty_struct *tty)
1225 {
1226 struct usb_serial_port *port = tty->driver_data;
1227 struct whiteheat_port_settings port_settings;
1228 unsigned int cflag = tty->termios->c_cflag;
1229
1230 port_settings.port = port->number + 1;
1231
1232 /* get the byte size */
1233 switch (cflag & CSIZE) {
1234 case CS5: port_settings.bits = 5; break;
1235 case CS6: port_settings.bits = 6; break;
1236 case CS7: port_settings.bits = 7; break;
1237 default:
1238 case CS8: port_settings.bits = 8; break;
1239 }
1240 dbg("%s - data bits = %d", __func__, port_settings.bits);
1241
1242 /* determine the parity */
1243 if (cflag & PARENB)
1244 if (cflag & CMSPAR)
1245 if (cflag & PARODD)
1246 port_settings.parity = WHITEHEAT_PAR_MARK;
1247 else
1248 port_settings.parity = WHITEHEAT_PAR_SPACE;
1249 else
1250 if (cflag & PARODD)
1251 port_settings.parity = WHITEHEAT_PAR_ODD;
1252 else
1253 port_settings.parity = WHITEHEAT_PAR_EVEN;
1254 else
1255 port_settings.parity = WHITEHEAT_PAR_NONE;
1256 dbg("%s - parity = %c", __func__, port_settings.parity);
1257
1258 /* figure out the stop bits requested */
1259 if (cflag & CSTOPB)
1260 port_settings.stop = 2;
1261 else
1262 port_settings.stop = 1;
1263 dbg("%s - stop bits = %d", __func__, port_settings.stop);
1264
1265 /* figure out the flow control settings */
1266 if (cflag & CRTSCTS)
1267 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
1268 WHITEHEAT_HFLOW_RTS);
1269 else
1270 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1271 dbg("%s - hardware flow control = %s %s %s %s", __func__,
1272 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1273 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1274 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1275 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1276
1277 /* determine software flow control */
1278 if (I_IXOFF(tty))
1279 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1280 else
1281 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1282 dbg("%s - software flow control = %c", __func__, port_settings.sflow);
1283
1284 port_settings.xon = START_CHAR(tty);
1285 port_settings.xoff = STOP_CHAR(tty);
1286 dbg("%s - XON = %2x, XOFF = %2x",
1287 __func__, port_settings.xon, port_settings.xoff);
1288
1289 /* get the baud rate wanted */
1290 port_settings.baud = tty_get_baud_rate(tty);
1291 dbg("%s - baud rate = %d", __func__, port_settings.baud);
1292
1293 /* fixme: should set validated settings */
1294 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
1295 /* handle any settings that aren't specified in the tty structure */
1296 port_settings.lloop = 0;
1297
1298 /* now send the message to the device */
1299 return firm_send_command(port, WHITEHEAT_SETUP_PORT,
1300 (__u8 *)&port_settings, sizeof(port_settings));
1301 }
1302
1303
1304 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
1305 {
1306 struct whiteheat_set_rdb rts_command;
1307
1308 rts_command.port = port->number - port->serial->minor + 1;
1309 rts_command.state = onoff;
1310 return firm_send_command(port, WHITEHEAT_SET_RTS,
1311 (__u8 *)&rts_command, sizeof(rts_command));
1312 }
1313
1314
1315 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
1316 {
1317 struct whiteheat_set_rdb dtr_command;
1318
1319 dtr_command.port = port->number - port->serial->minor + 1;
1320 dtr_command.state = onoff;
1321 return firm_send_command(port, WHITEHEAT_SET_DTR,
1322 (__u8 *)&dtr_command, sizeof(dtr_command));
1323 }
1324
1325
1326 static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
1327 {
1328 struct whiteheat_set_rdb break_command;
1329
1330 break_command.port = port->number - port->serial->minor + 1;
1331 break_command.state = onoff;
1332 return firm_send_command(port, WHITEHEAT_SET_BREAK,
1333 (__u8 *)&break_command, sizeof(break_command));
1334 }
1335
1336
1337 static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
1338 {
1339 struct whiteheat_purge purge_command;
1340
1341 purge_command.port = port->number - port->serial->minor + 1;
1342 purge_command.what = rxtx;
1343 return firm_send_command(port, WHITEHEAT_PURGE,
1344 (__u8 *)&purge_command, sizeof(purge_command));
1345 }
1346
1347
1348 static int firm_get_dtr_rts(struct usb_serial_port *port)
1349 {
1350 struct whiteheat_simple get_dr_command;
1351
1352 get_dr_command.port = port->number - port->serial->minor + 1;
1353 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
1354 (__u8 *)&get_dr_command, sizeof(get_dr_command));
1355 }
1356
1357
1358 static int firm_report_tx_done(struct usb_serial_port *port)
1359 {
1360 struct whiteheat_simple close_command;
1361
1362 close_command.port = port->number - port->serial->minor + 1;
1363 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
1364 (__u8 *)&close_command, sizeof(close_command));
1365 }
1366
1367
1368 /*****************************************************************************
1369 * Connect Tech's White Heat utility functions
1370 *****************************************************************************/
1371 static int start_command_port(struct usb_serial *serial)
1372 {
1373 struct usb_serial_port *command_port;
1374 struct whiteheat_command_private *command_info;
1375 int retval = 0;
1376
1377 command_port = serial->port[COMMAND_PORT];
1378 command_info = usb_get_serial_port_data(command_port);
1379 mutex_lock(&command_info->mutex);
1380 if (!command_info->port_running) {
1381 /* Work around HCD bugs */
1382 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1383
1384 command_port->read_urb->dev = serial->dev;
1385 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1386 if (retval) {
1387 err("%s - failed submitting read urb, error %d",
1388 __func__, retval);
1389 goto exit;
1390 }
1391 }
1392 command_info->port_running++;
1393
1394 exit:
1395 mutex_unlock(&command_info->mutex);
1396 return retval;
1397 }
1398
1399
1400 static void stop_command_port(struct usb_serial *serial)
1401 {
1402 struct usb_serial_port *command_port;
1403 struct whiteheat_command_private *command_info;
1404
1405 command_port = serial->port[COMMAND_PORT];
1406 command_info = usb_get_serial_port_data(command_port);
1407 mutex_lock(&command_info->mutex);
1408 command_info->port_running--;
1409 if (!command_info->port_running)
1410 usb_kill_urb(command_port->read_urb);
1411 mutex_unlock(&command_info->mutex);
1412 }
1413
1414
1415 static int start_port_read(struct usb_serial_port *port)
1416 {
1417 struct whiteheat_private *info = usb_get_serial_port_data(port);
1418 struct whiteheat_urb_wrap *wrap;
1419 struct urb *urb;
1420 int retval = 0;
1421 unsigned long flags;
1422 struct list_head *tmp;
1423 struct list_head *tmp2;
1424
1425 spin_lock_irqsave(&info->lock, flags);
1426
1427 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1428 list_del(tmp);
1429 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1430 urb = wrap->urb;
1431 urb->dev = port->serial->dev;
1432 spin_unlock_irqrestore(&info->lock, flags);
1433 retval = usb_submit_urb(urb, GFP_KERNEL);
1434 if (retval) {
1435 spin_lock_irqsave(&info->lock, flags);
1436 list_add(tmp, &info->rx_urbs_free);
1437 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1438 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1439 urb = wrap->urb;
1440 list_del(tmp);
1441 spin_unlock_irqrestore(&info->lock, flags);
1442 usb_kill_urb(urb);
1443 spin_lock_irqsave(&info->lock, flags);
1444 list_add(tmp, &info->rx_urbs_free);
1445 }
1446 break;
1447 }
1448 spin_lock_irqsave(&info->lock, flags);
1449 list_add(tmp, &info->rx_urbs_submitted);
1450 }
1451
1452 spin_unlock_irqrestore(&info->lock, flags);
1453
1454 return retval;
1455 }
1456
1457
1458 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
1459 struct list_head *head)
1460 {
1461 struct whiteheat_urb_wrap *wrap;
1462 struct list_head *tmp;
1463
1464 list_for_each(tmp, head) {
1465 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1466 if (wrap->urb == urb)
1467 return wrap;
1468 }
1469
1470 return NULL;
1471 }
1472
1473
1474 static struct list_head *list_first(struct list_head *head)
1475 {
1476 return head->next;
1477 }
1478
1479
1480 static void rx_data_softint(struct work_struct *work)
1481 {
1482 struct whiteheat_private *info =
1483 container_of(work, struct whiteheat_private, rx_work);
1484 struct usb_serial_port *port = info->port;
1485 struct tty_struct *tty = port->port.tty;
1486 struct whiteheat_urb_wrap *wrap;
1487 struct urb *urb;
1488 unsigned long flags;
1489 struct list_head *tmp;
1490 struct list_head *tmp2;
1491 int result;
1492 int sent = 0;
1493
1494 spin_lock_irqsave(&info->lock, flags);
1495 if (info->flags & THROTTLED) {
1496 spin_unlock_irqrestore(&info->lock, flags);
1497 return;
1498 }
1499
1500 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1501 list_del(tmp);
1502 spin_unlock_irqrestore(&info->lock, flags);
1503
1504 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1505 urb = wrap->urb;
1506
1507 if (tty && urb->actual_length) {
1508 int len = tty_buffer_request_room(tty,
1509 urb->actual_length);
1510 /* This stuff can go away now I suspect */
1511 if (unlikely(len < urb->actual_length)) {
1512 spin_lock_irqsave(&info->lock, flags);
1513 list_add(tmp, &info->rx_urb_q);
1514 spin_unlock_irqrestore(&info->lock, flags);
1515 tty_flip_buffer_push(tty);
1516 schedule_work(&info->rx_work);
1517 return;
1518 }
1519 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1520 sent += len;
1521 }
1522
1523 urb->dev = port->serial->dev;
1524 result = usb_submit_urb(urb, GFP_ATOMIC);
1525 if (result) {
1526 err("%s - failed resubmitting read urb, error %d",
1527 __func__, result);
1528 spin_lock_irqsave(&info->lock, flags);
1529 list_add(tmp, &info->rx_urbs_free);
1530 continue;
1531 }
1532
1533 spin_lock_irqsave(&info->lock, flags);
1534 list_add(tmp, &info->rx_urbs_submitted);
1535 }
1536 spin_unlock_irqrestore(&info->lock, flags);
1537
1538 if (sent)
1539 tty_flip_buffer_push(tty);
1540 }
1541
1542
1543 /*****************************************************************************
1544 * Connect Tech's White Heat module functions
1545 *****************************************************************************/
1546 static int __init whiteheat_init(void)
1547 {
1548 int retval;
1549 retval = usb_serial_register(&whiteheat_fake_device);
1550 if (retval)
1551 goto failed_fake_register;
1552 retval = usb_serial_register(&whiteheat_device);
1553 if (retval)
1554 goto failed_device_register;
1555 retval = usb_register(&whiteheat_driver);
1556 if (retval)
1557 goto failed_usb_register;
1558 info(DRIVER_DESC " " DRIVER_VERSION);
1559 return 0;
1560 failed_usb_register:
1561 usb_serial_deregister(&whiteheat_device);
1562 failed_device_register:
1563 usb_serial_deregister(&whiteheat_fake_device);
1564 failed_fake_register:
1565 return retval;
1566 }
1567
1568
1569 static void __exit whiteheat_exit(void)
1570 {
1571 usb_deregister(&whiteheat_driver);
1572 usb_serial_deregister(&whiteheat_fake_device);
1573 usb_serial_deregister(&whiteheat_device);
1574 }
1575
1576
1577 module_init(whiteheat_init);
1578 module_exit(whiteheat_exit);
1579
1580 MODULE_AUTHOR(DRIVER_AUTHOR);
1581 MODULE_DESCRIPTION(DRIVER_DESC);
1582 MODULE_LICENSE("GPL");
1583
1584 MODULE_FIRMWARE("whiteheat.fw");
1585 MODULE_FIRMWARE("whiteheat_loader.fw");
1586
1587 module_param(urb_pool_size, int, 0);
1588 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1589
1590 module_param(debug, bool, S_IRUGO | S_IWUSR);
1591 MODULE_PARM_DESC(debug, "Debug enabled or not");
Support for the Chinese Samsung S3C2440 based development boards