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revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / drivers / usb / serial / whiteheat.c
blobee5dd8b5a7131b23846d153586686f1163fa7dec
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 driver
16 *
17 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
18 * Upgrade to full working driver
19 *
20 * (05/30/2001) gkh
21 * switched from using spinlock to a semaphore, which fixes lots of problems.
22 *
23 * (04/08/2001) gb
24 * Identify version on module load.
25 *
26 * 2001_Mar_19 gkh
27 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
28 * than once, and the got the proper usb_device_id table entries so
29 * the driver works again.
30 *
31 * (11/01/2000) Adam J. Richter
32 * usb_device_id table support
33 *
34 * (10/05/2000) gkh
35 * Fixed bug with urb->dev not being set properly, now that the usb
36 * core needs it.
37 *
38 * (10/03/2000) smd
39 * firmware is improved to guard against crap sent to device
40 * firmware now replies CMD_FAILURE on bad things
41 * read_callback fix you provided for private info struct
42 * command_finished now indicates success or fail
43 * setup_port struct now packed to avoid gcc padding
44 * firmware uses 1 based port numbering, driver now handles that
45 *
46 * (09/11/2000) gkh
47 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
48 *
49 * (07/19/2000) gkh
50 * Added module_init and module_exit functions to handle the fact that this
51 * driver is a loadable module now.
52 * Fixed bug with port->minor that was found by Al Borchers
53 *
54 * (07/04/2000) gkh
55 * Added support for port settings. Baud rate can now be changed. Line signals
56 * are not transferred to and from the tty layer yet, but things seem to be
57 * working well now.
58 *
59 * (05/04/2000) gkh
60 * First cut at open and close commands. Data can flow through the ports at
61 * default speeds now.
62 *
63 * (03/26/2000) gkh
64 * Split driver up into device specific pieces.
65 *
66 */
67
68 #include <linux/kernel.h>
69 #include <linux/errno.h>
70 #include <linux/init.h>
71 #include <linux/slab.h>
72 #include <linux/tty.h>
73 #include <linux/tty_driver.h>
74 #include <linux/tty_flip.h>
75 #include <linux/module.h>
76 #include <linux/spinlock.h>
77 #include <linux/mutex.h>
78 #include <asm/uaccess.h>
79 #include <asm/termbits.h>
80 #include <linux/usb.h>
81 #include <linux/serial_reg.h>
82 #include <linux/serial.h>
83 #include <linux/usb/serial.h>
84 #include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
85 #include "whiteheat.h" /* WhiteHEAT specific commands */
86
87 static int debug;
88
89 #ifndef CMSPAR
90 #define CMSPAR 0
91 #endif
92
93 /*
94 * Version Information
95 */
96 #define DRIVER_VERSION "v2.0"
97 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
98 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
99
100 #define CONNECT_TECH_VENDOR_ID 0x0710
101 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
102 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
103
104 /*
105 ID tables for whiteheat are unusual, because we want to different
106 things for different versions of the device. Eventually, this
107 will be doable from a single table. But, for now, we define two
108 separate ID tables, and then a third table that combines them
109 just for the purpose of exporting the autoloading information.
110 */
111 static struct usb_device_id id_table_std [] = {
112 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
113 { } /* Terminating entry */
114 };
115
116 static struct usb_device_id id_table_prerenumeration [] = {
117 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
118 { } /* Terminating entry */
119 };
120
121 static struct usb_device_id id_table_combined [] = {
122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
123 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
124 { } /* Terminating entry */
125 };
126
127 MODULE_DEVICE_TABLE (usb, id_table_combined);
128
129 static struct usb_driver whiteheat_driver = {
130 .name = "whiteheat",
131 .probe = usb_serial_probe,
132 .disconnect = usb_serial_disconnect,
133 .id_table = id_table_combined,
134 .no_dynamic_id = 1,
135 };
136
137 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
138 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
139 static int whiteheat_firmware_attach (struct usb_serial *serial);
140
141 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
142 static int whiteheat_attach (struct usb_serial *serial);
143 static void whiteheat_shutdown (struct usb_serial *serial);
144 static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
145 static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
146 static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count);
147 static int whiteheat_write_room (struct usb_serial_port *port);
148 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
149 static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios * old);
150 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file);
151 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
152 static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state);
153 static int whiteheat_chars_in_buffer (struct usb_serial_port *port);
154 static void whiteheat_throttle (struct usb_serial_port *port);
155 static void whiteheat_unthrottle (struct usb_serial_port *port);
156 static void whiteheat_read_callback (struct urb *urb);
157 static void whiteheat_write_callback (struct urb *urb);
158
159 static struct usb_serial_driver whiteheat_fake_device = {
160 .driver = {
161 .owner = THIS_MODULE,
162 .name = "whiteheatnofirm",
163 },
164 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
165 .usb_driver = &whiteheat_driver,
166 .id_table = id_table_prerenumeration,
167 .num_interrupt_in = NUM_DONT_CARE,
168 .num_bulk_in = NUM_DONT_CARE,
169 .num_bulk_out = NUM_DONT_CARE,
170 .num_ports = 1,
171 .probe = whiteheat_firmware_download,
172 .attach = whiteheat_firmware_attach,
173 };
174
175 static struct usb_serial_driver whiteheat_device = {
176 .driver = {
177 .owner = THIS_MODULE,
178 .name = "whiteheat",
179 },
180 .description = "Connect Tech - WhiteHEAT",
181 .usb_driver = &whiteheat_driver,
182 .id_table = id_table_std,
183 .num_interrupt_in = NUM_DONT_CARE,
184 .num_bulk_in = NUM_DONT_CARE,
185 .num_bulk_out = NUM_DONT_CARE,
186 .num_ports = 4,
187 .attach = whiteheat_attach,
188 .shutdown = whiteheat_shutdown,
189 .open = whiteheat_open,
190 .close = whiteheat_close,
191 .write = whiteheat_write,
192 .write_room = whiteheat_write_room,
193 .ioctl = whiteheat_ioctl,
194 .set_termios = whiteheat_set_termios,
195 .break_ctl = whiteheat_break_ctl,
196 .tiocmget = whiteheat_tiocmget,
197 .tiocmset = whiteheat_tiocmset,
198 .chars_in_buffer = whiteheat_chars_in_buffer,
199 .throttle = whiteheat_throttle,
200 .unthrottle = whiteheat_unthrottle,
201 .read_bulk_callback = whiteheat_read_callback,
202 .write_bulk_callback = whiteheat_write_callback,
203 };
204
205
206 struct whiteheat_command_private {
207 struct mutex mutex;
208 __u8 port_running;
209 __u8 command_finished;
210 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
211 __u8 result_buffer[64];
212 };
213
214
215 #define THROTTLED 0x01
216 #define ACTUALLY_THROTTLED 0x02
217
218 static int urb_pool_size = 8;
219
220 struct whiteheat_urb_wrap {
221 struct list_head list;
222 struct urb *urb;
223 };
224
225 struct whiteheat_private {
226 spinlock_t lock;
227 __u8 flags;
228 __u8 mcr;
229 struct list_head rx_urbs_free;
230 struct list_head rx_urbs_submitted;
231 struct list_head rx_urb_q;
232 struct work_struct rx_work;
233 struct usb_serial_port *port;
234 struct list_head tx_urbs_free;
235 struct list_head tx_urbs_submitted;
236 struct mutex deathwarrant;
237 };
238
239
240 /* local function prototypes */
241 static int start_command_port(struct usb_serial *serial);
242 static void stop_command_port(struct usb_serial *serial);
243 static void command_port_write_callback(struct urb *urb);
244 static void command_port_read_callback(struct urb *urb);
245
246 static int start_port_read(struct usb_serial_port *port);
247 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
248 static struct list_head *list_first(struct list_head *head);
249 static void rx_data_softint(struct work_struct *work);
250
251 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
252 static int firm_open(struct usb_serial_port *port);
253 static int firm_close(struct usb_serial_port *port);
254 static int firm_setup_port(struct usb_serial_port *port);
255 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
256 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
257 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
258 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
259 static int firm_get_dtr_rts(struct usb_serial_port *port);
260 static int firm_report_tx_done(struct usb_serial_port *port);
261
262
263 #define COMMAND_PORT 4
264 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
265 #define COMMAND_TIMEOUT_MS 2000
266 #define CLOSING_DELAY (30 * HZ)
267
268
269 /*****************************************************************************
270 * Connect Tech's White Heat prerenumeration driver functions
271 *****************************************************************************/
272
273 /* steps to download the firmware to the WhiteHEAT device:
274 - hold the reset (by writing to the reset bit of the CPUCS register)
275 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
276 - release the reset (by writing to the CPUCS register)
277 - download the WH.HEX file for all addresses greater than 0x1b3f using
278 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
279 - hold the reset
280 - download the WH.HEX file for all addresses less than 0x1b40 using
281 VENDOR_REQUEST_ANCHOR_LOAD
282 - release the reset
283 - device renumerated itself and comes up as new device id with all
284 firmware download completed.
285 */
286 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
287 {
288 int response;
289 const struct whiteheat_hex_record *record;
290
291 dbg("%s", __FUNCTION__);
292
293 response = ezusb_set_reset (serial, 1);
294
295 record = &whiteheat_loader[0];
296 while (record->address != 0xffff) {
297 response = ezusb_writememory (serial, record->address,
298 (unsigned char *)record->data, record->data_size, 0xa0);
299 if (response < 0) {
300 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
301 __FUNCTION__, response, record->address, record->data, record->data_size);
302 break;
303 }
304 ++record;
305 }
306
307 response = ezusb_set_reset (serial, 0);
308
309 record = &whiteheat_firmware[0];
310 while (record->address < 0x1b40) {
311 ++record;
312 }
313 while (record->address != 0xffff) {
314 response = ezusb_writememory (serial, record->address,
315 (unsigned char *)record->data, record->data_size, 0xa3);
316 if (response < 0) {
317 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
318 __FUNCTION__, response, record->address, record->data, record->data_size);
319 break;
320 }
321 ++record;
322 }
323
324 response = ezusb_set_reset (serial, 1);
325
326 record = &whiteheat_firmware[0];
327 while (record->address < 0x1b40) {
328 response = ezusb_writememory (serial, record->address,
329 (unsigned char *)record->data, record->data_size, 0xa0);
330 if (response < 0) {
331 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
332 __FUNCTION__, response, record->address, record->data, record->data_size);
333 break;
334 }
335 ++record;
336 }
337
338 response = ezusb_set_reset (serial, 0);
339
340 return 0;
341 }
342
343
344 static int whiteheat_firmware_attach (struct usb_serial *serial)
345 {
346 /* We want this device to fail to have a driver assigned to it */
347 return 1;
348 }
349
350
351 /*****************************************************************************
352 * Connect Tech's White Heat serial driver functions
353 *****************************************************************************/
354 static int whiteheat_attach (struct usb_serial *serial)
355 {
356 struct usb_serial_port *command_port;
357 struct whiteheat_command_private *command_info;
358 struct usb_serial_port *port;
359 struct whiteheat_private *info;
360 struct whiteheat_hw_info *hw_info;
361 int pipe;
362 int ret;
363 int alen;
364 __u8 *command;
365 __u8 *result;
366 int i;
367 int j;
368 struct urb *urb;
369 int buf_size;
370 struct whiteheat_urb_wrap *wrap;
371 struct list_head *tmp;
372
373 command_port = serial->port[COMMAND_PORT];
374
375 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
376 command = kmalloc(2, GFP_KERNEL);
377 if (!command)
378 goto no_command_buffer;
379 command[0] = WHITEHEAT_GET_HW_INFO;
380 command[1] = 0;
381
382 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
383 if (!result)
384 goto no_result_buffer;
385 /*
386 * When the module is reloaded the firmware is still there and
387 * the endpoints are still in the usb core unchanged. This is the
388 * unlinking bug in disguise. Same for the call below.
389 */
390 usb_clear_halt(serial->dev, pipe);
391 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
392 if (ret) {
393 err("%s: Couldn't send command [%d]", serial->type->description, ret);
394 goto no_firmware;
395 } else if (alen != 2) {
396 err("%s: Send command incomplete [%d]", serial->type->description, alen);
397 goto no_firmware;
398 }
399
400 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
401 /* See the comment on the usb_clear_halt() above */
402 usb_clear_halt(serial->dev, pipe);
403 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
404 if (ret) {
405 err("%s: Couldn't get results [%d]", serial->type->description, ret);
406 goto no_firmware;
407 } else if (alen != sizeof(*hw_info) + 1) {
408 err("%s: Get results incomplete [%d]", serial->type->description, alen);
409 goto no_firmware;
410 } else if (result[0] != command[0]) {
411 err("%s: Command failed [%d]", serial->type->description, result[0]);
412 goto no_firmware;
413 }
414
415 hw_info = (struct whiteheat_hw_info *)&result[1];
416
417 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
418 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
419
420 for (i = 0; i < serial->num_ports; i++) {
421 port = serial->port[i];
422
423 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
424 if (info == NULL) {
425 err("%s: Out of memory for port structures\n", serial->type->description);
426 goto no_private;
427 }
428
429 spin_lock_init(&info->lock);
430 mutex_init(&info->deathwarrant);
431 info->flags = 0;
432 info->mcr = 0;
433 INIT_WORK(&info->rx_work, rx_data_softint);
434 info->port = port;
435
436 INIT_LIST_HEAD(&info->rx_urbs_free);
437 INIT_LIST_HEAD(&info->rx_urbs_submitted);
438 INIT_LIST_HEAD(&info->rx_urb_q);
439 INIT_LIST_HEAD(&info->tx_urbs_free);
440 INIT_LIST_HEAD(&info->tx_urbs_submitted);
441
442 for (j = 0; j < urb_pool_size; j++) {
443 urb = usb_alloc_urb(0, GFP_KERNEL);
444 if (!urb) {
445 err("No free urbs available");
446 goto no_rx_urb;
447 }
448 buf_size = port->read_urb->transfer_buffer_length;
449 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
450 if (!urb->transfer_buffer) {
451 err("Couldn't allocate urb buffer");
452 goto no_rx_buf;
453 }
454 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
455 if (!wrap) {
456 err("Couldn't allocate urb wrapper");
457 goto no_rx_wrap;
458 }
459 usb_fill_bulk_urb(urb, serial->dev,
460 usb_rcvbulkpipe(serial->dev,
461 port->bulk_in_endpointAddress),
462 urb->transfer_buffer, buf_size,
463 whiteheat_read_callback, port);
464 wrap->urb = urb;
465 list_add(&wrap->list, &info->rx_urbs_free);
466
467 urb = usb_alloc_urb(0, GFP_KERNEL);
468 if (!urb) {
469 err("No free urbs available");
470 goto no_tx_urb;
471 }
472 buf_size = port->write_urb->transfer_buffer_length;
473 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
474 if (!urb->transfer_buffer) {
475 err("Couldn't allocate urb buffer");
476 goto no_tx_buf;
477 }
478 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
479 if (!wrap) {
480 err("Couldn't allocate urb wrapper");
481 goto no_tx_wrap;
482 }
483 usb_fill_bulk_urb(urb, serial->dev,
484 usb_sndbulkpipe(serial->dev,
485 port->bulk_out_endpointAddress),
486 urb->transfer_buffer, buf_size,
487 whiteheat_write_callback, port);
488 wrap->urb = urb;
489 list_add(&wrap->list, &info->tx_urbs_free);
490 }
491
492 usb_set_serial_port_data(port, info);
493 }
494
495 command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
496 if (command_info == NULL) {
497 err("%s: Out of memory for port structures\n", serial->type->description);
498 goto no_command_private;
499 }
500
501 mutex_init(&command_info->mutex);
502 command_info->port_running = 0;
503 init_waitqueue_head(&command_info->wait_command);
504 usb_set_serial_port_data(command_port, command_info);
505 command_port->write_urb->complete = command_port_write_callback;
506 command_port->read_urb->complete = command_port_read_callback;
507 kfree(result);
508 kfree(command);
509
510 return 0;
511
512 no_firmware:
513 /* Firmware likely not running */
514 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
515 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
516 err("%s: please contact support@connecttech.com\n", serial->type->description);
517 kfree(result);
518 return -ENODEV;
519
520 no_command_private:
521 for (i = serial->num_ports - 1; i >= 0; i--) {
522 port = serial->port[i];
523 info = usb_get_serial_port_data(port);
524 for (j = urb_pool_size - 1; j >= 0; j--) {
525 tmp = list_first(&info->tx_urbs_free);
526 list_del(tmp);
527 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
528 urb = wrap->urb;
529 kfree(wrap);
530 no_tx_wrap:
531 kfree(urb->transfer_buffer);
532 no_tx_buf:
533 usb_free_urb(urb);
534 no_tx_urb:
535 tmp = list_first(&info->rx_urbs_free);
536 list_del(tmp);
537 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
538 urb = wrap->urb;
539 kfree(wrap);
540 no_rx_wrap:
541 kfree(urb->transfer_buffer);
542 no_rx_buf:
543 usb_free_urb(urb);
544 no_rx_urb:
545 ;
546 }
547 kfree(info);
548 no_private:
549 ;
550 }
551 kfree(result);
552 no_result_buffer:
553 kfree(command);
554 no_command_buffer:
555 return -ENOMEM;
556 }
557
558
559 static void whiteheat_shutdown (struct usb_serial *serial)
560 {
561 struct usb_serial_port *command_port;
562 struct usb_serial_port *port;
563 struct whiteheat_private *info;
564 struct whiteheat_urb_wrap *wrap;
565 struct urb *urb;
566 struct list_head *tmp;
567 struct list_head *tmp2;
568 int i;
569
570 dbg("%s", __FUNCTION__);
571
572 /* free up our private data for our command port */
573 command_port = serial->port[COMMAND_PORT];
574 kfree (usb_get_serial_port_data(command_port));
575
576 for (i = 0; i < serial->num_ports; i++) {
577 port = serial->port[i];
578 info = usb_get_serial_port_data(port);
579 list_for_each_safe(tmp, tmp2, &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 kfree(urb->transfer_buffer);
585 usb_free_urb(urb);
586 }
587 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
588 list_del(tmp);
589 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
590 urb = wrap->urb;
591 kfree(wrap);
592 kfree(urb->transfer_buffer);
593 usb_free_urb(urb);
594 }
595 kfree(info);
596 }
597
598 return;
599 }
600
601
602 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
603 {
604 int retval = 0;
605 struct ktermios old_term;
606
607 dbg("%s - port %d", __FUNCTION__, port->number);
608
609 retval = start_command_port(port->serial);
610 if (retval)
611 goto exit;
612
613 if (port->tty)
614 port->tty->low_latency = 1;
615
616 /* send an open port command */
617 retval = firm_open(port);
618 if (retval) {
619 stop_command_port(port->serial);
620 goto exit;
621 }
622
623 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
624 if (retval) {
625 firm_close(port);
626 stop_command_port(port->serial);
627 goto exit;
628 }
629
630 old_term.c_cflag = ~port->tty->termios->c_cflag;
631 old_term.c_iflag = ~port->tty->termios->c_iflag;
632 whiteheat_set_termios(port, &old_term);
633
634 /* Work around HCD bugs */
635 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
636 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
637
638 /* Start reading from the device */
639 retval = start_port_read(port);
640 if (retval) {
641 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
642 firm_close(port);
643 stop_command_port(port->serial);
644 goto exit;
645 }
646
647 exit:
648 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
649 return retval;
650 }
651
652
653 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
654 {
655 struct whiteheat_private *info = usb_get_serial_port_data(port);
656 struct whiteheat_urb_wrap *wrap;
657 struct urb *urb;
658 struct list_head *tmp;
659 struct list_head *tmp2;
660
661 dbg("%s - port %d", __FUNCTION__, port->number);
662
663 /* filp is NULL when called from usb_serial_disconnect */
664 if (filp && (tty_hung_up_p(filp))) {
665 return;
666 }
667
668 port->tty->closing = 1;
669
670 /*
671 * Not currently in use; tty_wait_until_sent() calls
672 * serial_chars_in_buffer() which deadlocks on the second semaphore
673 * acquisition. This should be fixed at some point. Greg's been
674 * notified.
675 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
676 tty_wait_until_sent(port->tty, CLOSING_DELAY);
677 }
678 */
679
680 if (port->tty->driver->flush_buffer)
681 port->tty->driver->flush_buffer(port->tty);
682 tty_ldisc_flush(port->tty);
683
684 firm_report_tx_done(port);
685
686 firm_close(port);
687
688 printk(KERN_ERR"Before processing rx_urbs_submitted.\n");
689 /* shutdown our bulk reads and writes */
690 mutex_lock(&info->deathwarrant);
691 spin_lock_irq(&info->lock);
692 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
693 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
694 urb = wrap->urb;
695 list_del(tmp);
696 spin_unlock_irq(&info->lock);
697 usb_kill_urb(urb);
698 spin_lock_irq(&info->lock);
699 list_add(tmp, &info->rx_urbs_free);
700 }
701 list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
702 list_move(tmp, &info->rx_urbs_free);
703 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
704 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
705 urb = wrap->urb;
706 list_del(tmp);
707 spin_unlock_irq(&info->lock);
708 usb_kill_urb(urb);
709 spin_lock_irq(&info->lock);
710 list_add(tmp, &info->tx_urbs_free);
711 }
712 spin_unlock_irq(&info->lock);
713 mutex_unlock(&info->deathwarrant);
714
715 stop_command_port(port->serial);
716
717 port->tty->closing = 0;
718 }
719
720
721 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
722 {
723 struct usb_serial *serial = port->serial;
724 struct whiteheat_private *info = usb_get_serial_port_data(port);
725 struct whiteheat_urb_wrap *wrap;
726 struct urb *urb;
727 int result;
728 int bytes;
729 int sent = 0;
730 unsigned long flags;
731 struct list_head *tmp;
732
733 dbg("%s - port %d", __FUNCTION__, port->number);
734
735 if (count == 0) {
736 dbg("%s - write request of 0 bytes", __FUNCTION__);
737 return (0);
738 }
739
740 while (count) {
741 spin_lock_irqsave(&info->lock, flags);
742 if (list_empty(&info->tx_urbs_free)) {
743 spin_unlock_irqrestore(&info->lock, flags);
744 break;
745 }
746 tmp = list_first(&info->tx_urbs_free);
747 list_del(tmp);
748 spin_unlock_irqrestore(&info->lock, flags);
749
750 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
751 urb = wrap->urb;
752 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
753 memcpy (urb->transfer_buffer, buf + sent, bytes);
754
755 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
756
757 urb->dev = serial->dev;
758 urb->transfer_buffer_length = bytes;
759 result = usb_submit_urb(urb, GFP_ATOMIC);
760 if (result) {
761 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
762 sent = result;
763 spin_lock_irqsave(&info->lock, flags);
764 list_add(tmp, &info->tx_urbs_free);
765 spin_unlock_irqrestore(&info->lock, flags);
766 break;
767 } else {
768 sent += bytes;
769 count -= bytes;
770 spin_lock_irqsave(&info->lock, flags);
771 list_add(tmp, &info->tx_urbs_submitted);
772 spin_unlock_irqrestore(&info->lock, flags);
773 }
774 }
775
776 return sent;
777 }
778
779
780 static int whiteheat_write_room(struct usb_serial_port *port)
781 {
782 struct whiteheat_private *info = usb_get_serial_port_data(port);
783 struct list_head *tmp;
784 int room = 0;
785 unsigned long flags;
786
787 dbg("%s - port %d", __FUNCTION__, port->number);
788
789 spin_lock_irqsave(&info->lock, flags);
790 list_for_each(tmp, &info->tx_urbs_free)
791 room++;
792 spin_unlock_irqrestore(&info->lock, flags);
793 room *= port->bulk_out_size;
794
795 dbg("%s - returns %d", __FUNCTION__, room);
796 return (room);
797 }
798
799
800 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
801 {
802 struct whiteheat_private *info = usb_get_serial_port_data(port);
803 unsigned int modem_signals = 0;
804
805 dbg("%s - port %d", __FUNCTION__, port->number);
806
807 firm_get_dtr_rts(port);
808 if (info->mcr & UART_MCR_DTR)
809 modem_signals |= TIOCM_DTR;
810 if (info->mcr & UART_MCR_RTS)
811 modem_signals |= TIOCM_RTS;
812
813 return modem_signals;
814 }
815
816
817 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
818 unsigned int set, unsigned int clear)
819 {
820 struct whiteheat_private *info = usb_get_serial_port_data(port);
821
822 dbg("%s - port %d", __FUNCTION__, port->number);
823
824 if (set & TIOCM_RTS)
825 info->mcr |= UART_MCR_RTS;
826 if (set & TIOCM_DTR)
827 info->mcr |= UART_MCR_DTR;
828
829 if (clear & TIOCM_RTS)
830 info->mcr &= ~UART_MCR_RTS;
831 if (clear & TIOCM_DTR)
832 info->mcr &= ~UART_MCR_DTR;
833
834 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
835 firm_set_rts(port, info->mcr & UART_MCR_RTS);
836 return 0;
837 }
838
839
840 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
841 {
842 struct serial_struct serstruct;
843 void __user *user_arg = (void __user *)arg;
844
845 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
846
847 switch (cmd) {
848 case TIOCGSERIAL:
849 memset(&serstruct, 0, sizeof(serstruct));
850 serstruct.type = PORT_16654;
851 serstruct.line = port->serial->minor;
852 serstruct.port = port->number;
853 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
854 serstruct.xmit_fifo_size = port->bulk_out_size;
855 serstruct.custom_divisor = 0;
856 serstruct.baud_base = 460800;
857 serstruct.close_delay = CLOSING_DELAY;
858 serstruct.closing_wait = CLOSING_DELAY;
859
860 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
861 return -EFAULT;
862
863 break;
864
865 case TIOCSSERIAL:
866 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
867 return -EFAULT;
868
869 /*
870 * For now this is ignored. dip sets the ASYNC_[V]HI flags
871 * but this isn't used by us at all. Maybe someone somewhere
872 * will need the custom_divisor setting.
873 */
874
875 break;
876
877 default:
878 break;
879 }
880
881 return -ENOIOCTLCMD;
882 }
883
884
885 static void whiteheat_set_termios(struct usb_serial_port *port, struct ktermios *old_termios)
886 {
887 dbg("%s -port %d", __FUNCTION__, port->number);
888 firm_setup_port(port);
889 }
890
891
892 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
893 firm_set_break(port, break_state);
894 }
895
896
897 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
898 {
899 struct whiteheat_private *info = usb_get_serial_port_data(port);
900 struct list_head *tmp;
901 struct whiteheat_urb_wrap *wrap;
902 int chars = 0;
903 unsigned long flags;
904
905 dbg("%s - port %d", __FUNCTION__, port->number);
906
907 spin_lock_irqsave(&info->lock, flags);
908 list_for_each(tmp, &info->tx_urbs_submitted) {
909 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
910 chars += wrap->urb->transfer_buffer_length;
911 }
912 spin_unlock_irqrestore(&info->lock, flags);
913
914 dbg ("%s - returns %d", __FUNCTION__, chars);
915 return chars;
916 }
917
918
919 static void whiteheat_throttle (struct usb_serial_port *port)
920 {
921 struct whiteheat_private *info = usb_get_serial_port_data(port);
922 unsigned long flags;
923
924 dbg("%s - port %d", __FUNCTION__, port->number);
925
926 spin_lock_irqsave(&info->lock, flags);
927 info->flags |= THROTTLED;
928 spin_unlock_irqrestore(&info->lock, flags);
929
930 return;
931 }
932
933
934 static void whiteheat_unthrottle (struct usb_serial_port *port)
935 {
936 struct whiteheat_private *info = usb_get_serial_port_data(port);
937 int actually_throttled;
938 unsigned long flags;
939
940 dbg("%s - port %d", __FUNCTION__, port->number);
941
942 spin_lock_irqsave(&info->lock, flags);
943 actually_throttled = info->flags & ACTUALLY_THROTTLED;
944 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
945 spin_unlock_irqrestore(&info->lock, flags);
946
947 if (actually_throttled)
948 rx_data_softint(&info->rx_work);
949
950 return;
951 }
952
953
954 /*****************************************************************************
955 * Connect Tech's White Heat callback routines
956 *****************************************************************************/
957 static void command_port_write_callback(struct urb *urb)
958 {
959 int status = urb->status;
960
961 dbg("%s", __FUNCTION__);
962
963 if (status) {
964 dbg("nonzero urb status: %d", status);
965 return;
966 }
967 }
968
969
970 static void command_port_read_callback(struct urb *urb)
971 {
972 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
973 struct whiteheat_command_private *command_info;
974 int status = urb->status;
975 unsigned char *data = urb->transfer_buffer;
976 int result;
977
978 dbg("%s", __FUNCTION__);
979
980 command_info = usb_get_serial_port_data(command_port);
981 if (!command_info) {
982 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
983 return;
984 }
985 if (status) {
986 dbg("%s - nonzero urb status: %d", __FUNCTION__, status);
987 if (status != -ENOENT)
988 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
989 wake_up(&command_info->wait_command);
990 return;
991 }
992
993 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
994
995 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
996 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
997 wake_up(&command_info->wait_command);
998 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
999 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1000 wake_up(&command_info->wait_command);
1001 } else if (data[0] == WHITEHEAT_EVENT) {
1002 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1003 dbg("%s - event received", __FUNCTION__);
1004 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1005 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1006 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1007 wake_up(&command_info->wait_command);
1008 } else {
1009 dbg("%s - bad reply from firmware", __FUNCTION__);
1010 }
1011
1012 /* Continue trying to always read */
1013 command_port->read_urb->dev = command_port->serial->dev;
1014 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1015 if (result)
1016 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1017 }
1018
1019
1020 static void whiteheat_read_callback(struct urb *urb)
1021 {
1022 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1023 struct whiteheat_urb_wrap *wrap;
1024 unsigned char *data = urb->transfer_buffer;
1025 struct whiteheat_private *info = usb_get_serial_port_data(port);
1026 int status = urb->status;
1027
1028 dbg("%s - port %d", __FUNCTION__, port->number);
1029
1030 spin_lock(&info->lock);
1031 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1032 if (!wrap) {
1033 spin_unlock(&info->lock);
1034 err("%s - Not my urb!", __FUNCTION__);
1035 return;
1036 }
1037 list_del(&wrap->list);
1038 spin_unlock(&info->lock);
1039
1040 if (status) {
1041 dbg("%s - nonzero read bulk status received: %d",
1042 __FUNCTION__, status);
1043 spin_lock(&info->lock);
1044 list_add(&wrap->list, &info->rx_urbs_free);
1045 spin_unlock(&info->lock);
1046 return;
1047 }
1048
1049 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1050
1051 spin_lock(&info->lock);
1052 list_add_tail(&wrap->list, &info->rx_urb_q);
1053 if (info->flags & THROTTLED) {
1054 info->flags |= ACTUALLY_THROTTLED;
1055 spin_unlock(&info->lock);
1056 return;
1057 }
1058 spin_unlock(&info->lock);
1059
1060 schedule_work(&info->rx_work);
1061 }
1062
1063
1064 static void whiteheat_write_callback(struct urb *urb)
1065 {
1066 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1067 struct whiteheat_private *info = usb_get_serial_port_data(port);
1068 struct whiteheat_urb_wrap *wrap;
1069 int status = urb->status;
1070
1071 dbg("%s - port %d", __FUNCTION__, port->number);
1072
1073 spin_lock(&info->lock);
1074 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1075 if (!wrap) {
1076 spin_unlock(&info->lock);
1077 err("%s - Not my urb!", __FUNCTION__);
1078 return;
1079 }
1080 list_move(&wrap->list, &info->tx_urbs_free);
1081 spin_unlock(&info->lock);
1082
1083 if (status) {
1084 dbg("%s - nonzero write bulk status received: %d",
1085 __FUNCTION__, status);
1086 return;
1087 }
1088
1089 usb_serial_port_softint(port);
1090 }
1091
1092
1093 /*****************************************************************************
1094 * Connect Tech's White Heat firmware interface
1095 *****************************************************************************/
1096 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1097 {
1098 struct usb_serial_port *command_port;
1099 struct whiteheat_command_private *command_info;
1100 struct whiteheat_private *info;
1101 __u8 *transfer_buffer;
1102 int retval = 0;
1103 int t;
1104
1105 dbg("%s - command %d", __FUNCTION__, command);
1106
1107 command_port = port->serial->port[COMMAND_PORT];
1108 command_info = usb_get_serial_port_data(command_port);
1109 mutex_lock(&command_info->mutex);
1110 command_info->command_finished = false;
1111
1112 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1113 transfer_buffer[0] = command;
1114 memcpy (&transfer_buffer[1], data, datasize);
1115 command_port->write_urb->transfer_buffer_length = datasize + 1;
1116 command_port->write_urb->dev = port->serial->dev;
1117 retval = usb_submit_urb (command_port->write_urb, GFP_NOIO);
1118 if (retval) {
1119 dbg("%s - submit urb failed", __FUNCTION__);
1120 goto exit;
1121 }
1122
1123 /* wait for the command to complete */
1124 t = wait_event_timeout(command_info->wait_command,
1125 (bool)command_info->command_finished, COMMAND_TIMEOUT);
1126 if (!t)
1127 usb_kill_urb(command_port->write_urb);
1128
1129 if (command_info->command_finished == false) {
1130 dbg("%s - command timed out.", __FUNCTION__);
1131 retval = -ETIMEDOUT;
1132 goto exit;
1133 }
1134
1135 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1136 dbg("%s - command failed.", __FUNCTION__);
1137 retval = -EIO;
1138 goto exit;
1139 }
1140
1141 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1142 dbg("%s - command completed.", __FUNCTION__);
1143 switch (command) {
1144 case WHITEHEAT_GET_DTR_RTS:
1145 info = usb_get_serial_port_data(port);
1146 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1147 break;
1148 }
1149 }
1150
1151 exit:
1152 mutex_unlock(&command_info->mutex);
1153 return retval;
1154 }
1155
1156
1157 static int firm_open(struct usb_serial_port *port) {
1158 struct whiteheat_simple open_command;
1159
1160 open_command.port = port->number - port->serial->minor + 1;
1161 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1162 }
1163
1164
1165 static int firm_close(struct usb_serial_port *port) {
1166 struct whiteheat_simple close_command;
1167
1168 close_command.port = port->number - port->serial->minor + 1;
1169 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1170 }
1171
1172
1173 static int firm_setup_port(struct usb_serial_port *port) {
1174 struct whiteheat_port_settings port_settings;
1175 unsigned int cflag = port->tty->termios->c_cflag;
1176
1177 port_settings.port = port->number + 1;
1178
1179 /* get the byte size */
1180 switch (cflag & CSIZE) {
1181 case CS5: port_settings.bits = 5; break;
1182 case CS6: port_settings.bits = 6; break;
1183 case CS7: port_settings.bits = 7; break;
1184 default:
1185 case CS8: port_settings.bits = 8; break;
1186 }
1187 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1188
1189 /* determine the parity */
1190 if (cflag & PARENB)
1191 if (cflag & CMSPAR)
1192 if (cflag & PARODD)
1193 port_settings.parity = WHITEHEAT_PAR_MARK;
1194 else
1195 port_settings.parity = WHITEHEAT_PAR_SPACE;
1196 else
1197 if (cflag & PARODD)
1198 port_settings.parity = WHITEHEAT_PAR_ODD;
1199 else
1200 port_settings.parity = WHITEHEAT_PAR_EVEN;
1201 else
1202 port_settings.parity = WHITEHEAT_PAR_NONE;
1203 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1204
1205 /* figure out the stop bits requested */
1206 if (cflag & CSTOPB)
1207 port_settings.stop = 2;
1208 else
1209 port_settings.stop = 1;
1210 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1211
1212 /* figure out the flow control settings */
1213 if (cflag & CRTSCTS)
1214 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1215 else
1216 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1217 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1218 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1219 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1220 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1221 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1222
1223 /* determine software flow control */
1224 if (I_IXOFF(port->tty))
1225 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1226 else
1227 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1228 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1229
1230 port_settings.xon = START_CHAR(port->tty);
1231 port_settings.xoff = STOP_CHAR(port->tty);
1232 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1233
1234 /* get the baud rate wanted */
1235 port_settings.baud = tty_get_baud_rate(port->tty);
1236 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1237
1238 /* fixme: should set validated settings */
1239 tty_encode_baud_rate(port->tty, port_settings.baud, port_settings.baud);
1240 /* handle any settings that aren't specified in the tty structure */
1241 port_settings.lloop = 0;
1242
1243 /* now send the message to the device */
1244 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1245 }
1246
1247
1248 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1249 struct whiteheat_set_rdb rts_command;
1250
1251 rts_command.port = port->number - port->serial->minor + 1;
1252 rts_command.state = onoff;
1253 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1254 }
1255
1256
1257 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1258 struct whiteheat_set_rdb dtr_command;
1259
1260 dtr_command.port = port->number - port->serial->minor + 1;
1261 dtr_command.state = onoff;
1262 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1263 }
1264
1265
1266 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1267 struct whiteheat_set_rdb break_command;
1268
1269 break_command.port = port->number - port->serial->minor + 1;
1270 break_command.state = onoff;
1271 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1272 }
1273
1274
1275 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1276 struct whiteheat_purge purge_command;
1277
1278 purge_command.port = port->number - port->serial->minor + 1;
1279 purge_command.what = rxtx;
1280 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1281 }
1282
1283
1284 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1285 struct whiteheat_simple get_dr_command;
1286
1287 get_dr_command.port = port->number - port->serial->minor + 1;
1288 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1289 }
1290
1291
1292 static int firm_report_tx_done(struct usb_serial_port *port) {
1293 struct whiteheat_simple close_command;
1294
1295 close_command.port = port->number - port->serial->minor + 1;
1296 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1297 }
1298
1299
1300 /*****************************************************************************
1301 * Connect Tech's White Heat utility functions
1302 *****************************************************************************/
1303 static int start_command_port(struct usb_serial *serial)
1304 {
1305 struct usb_serial_port *command_port;
1306 struct whiteheat_command_private *command_info;
1307 int retval = 0;
1308
1309 command_port = serial->port[COMMAND_PORT];
1310 command_info = usb_get_serial_port_data(command_port);
1311 mutex_lock(&command_info->mutex);
1312 if (!command_info->port_running) {
1313 /* Work around HCD bugs */
1314 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1315
1316 command_port->read_urb->dev = serial->dev;
1317 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1318 if (retval) {
1319 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1320 goto exit;
1321 }
1322 }
1323 command_info->port_running++;
1324
1325 exit:
1326 mutex_unlock(&command_info->mutex);
1327 return retval;
1328 }
1329
1330
1331 static void stop_command_port(struct usb_serial *serial)
1332 {
1333 struct usb_serial_port *command_port;
1334 struct whiteheat_command_private *command_info;
1335
1336 command_port = serial->port[COMMAND_PORT];
1337 command_info = usb_get_serial_port_data(command_port);
1338 mutex_lock(&command_info->mutex);
1339 command_info->port_running--;
1340 if (!command_info->port_running)
1341 usb_kill_urb(command_port->read_urb);
1342 mutex_unlock(&command_info->mutex);
1343 }
1344
1345
1346 static int start_port_read(struct usb_serial_port *port)
1347 {
1348 struct whiteheat_private *info = usb_get_serial_port_data(port);
1349 struct whiteheat_urb_wrap *wrap;
1350 struct urb *urb;
1351 int retval = 0;
1352 unsigned long flags;
1353 struct list_head *tmp;
1354 struct list_head *tmp2;
1355
1356 spin_lock_irqsave(&info->lock, flags);
1357
1358 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1359 list_del(tmp);
1360 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1361 urb = wrap->urb;
1362 urb->dev = port->serial->dev;
1363 spin_unlock_irqrestore(&info->lock, flags);
1364 retval = usb_submit_urb(urb, GFP_KERNEL);
1365 if (retval) {
1366 spin_lock_irqsave(&info->lock, flags);
1367 list_add(tmp, &info->rx_urbs_free);
1368 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1369 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1370 urb = wrap->urb;
1371 list_del(tmp);
1372 spin_unlock_irqrestore(&info->lock, flags);
1373 usb_kill_urb(urb);
1374 spin_lock_irqsave(&info->lock, flags);
1375 list_add(tmp, &info->rx_urbs_free);
1376 }
1377 break;
1378 }
1379 spin_lock_irqsave(&info->lock, flags);
1380 list_add(tmp, &info->rx_urbs_submitted);
1381 }
1382
1383 spin_unlock_irqrestore(&info->lock, flags);
1384
1385 return retval;
1386 }
1387
1388
1389 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1390 {
1391 struct whiteheat_urb_wrap *wrap;
1392 struct list_head *tmp;
1393
1394 list_for_each(tmp, head) {
1395 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1396 if (wrap->urb == urb)
1397 return wrap;
1398 }
1399
1400 return NULL;
1401 }
1402
1403
1404 static struct list_head *list_first(struct list_head *head)
1405 {
1406 return head->next;
1407 }
1408
1409
1410 static void rx_data_softint(struct work_struct *work)
1411 {
1412 struct whiteheat_private *info =
1413 container_of(work, struct whiteheat_private, rx_work);
1414 struct usb_serial_port *port = info->port;
1415 struct tty_struct *tty = port->tty;
1416 struct whiteheat_urb_wrap *wrap;
1417 struct urb *urb;
1418 unsigned long flags;
1419 struct list_head *tmp;
1420 struct list_head *tmp2;
1421 int result;
1422 int sent = 0;
1423
1424 spin_lock_irqsave(&info->lock, flags);
1425 if (info->flags & THROTTLED) {
1426 spin_unlock_irqrestore(&info->lock, flags);
1427 return;
1428 }
1429
1430 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1431 list_del(tmp);
1432 spin_unlock_irqrestore(&info->lock, flags);
1433
1434 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1435 urb = wrap->urb;
1436
1437 if (tty && urb->actual_length) {
1438 int len = tty_buffer_request_room(tty, urb->actual_length);
1439 /* This stuff can go away now I suspect */
1440 if (unlikely(len < urb->actual_length)) {
1441 spin_lock_irqsave(&info->lock, flags);
1442 list_add(tmp, &info->rx_urb_q);
1443 spin_unlock_irqrestore(&info->lock, flags);
1444 tty_flip_buffer_push(tty);
1445 schedule_work(&info->rx_work);
1446 return;
1447 }
1448 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1449 sent += len;
1450 }
1451
1452 urb->dev = port->serial->dev;
1453 result = usb_submit_urb(urb, GFP_ATOMIC);
1454 if (result) {
1455 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1456 spin_lock_irqsave(&info->lock, flags);
1457 list_add(tmp, &info->rx_urbs_free);
1458 continue;
1459 }
1460
1461 spin_lock_irqsave(&info->lock, flags);
1462 list_add(tmp, &info->rx_urbs_submitted);
1463 }
1464 spin_unlock_irqrestore(&info->lock, flags);
1465
1466 if (sent)
1467 tty_flip_buffer_push(tty);
1468 }
1469
1470
1471 /*****************************************************************************
1472 * Connect Tech's White Heat module functions
1473 *****************************************************************************/
1474 static int __init whiteheat_init (void)
1475 {
1476 int retval;
1477 retval = usb_serial_register(&whiteheat_fake_device);
1478 if (retval)
1479 goto failed_fake_register;
1480 retval = usb_serial_register(&whiteheat_device);
1481 if (retval)
1482 goto failed_device_register;
1483 retval = usb_register(&whiteheat_driver);
1484 if (retval)
1485 goto failed_usb_register;
1486 info(DRIVER_DESC " " DRIVER_VERSION);
1487 return 0;
1488 failed_usb_register:
1489 usb_serial_deregister(&whiteheat_device);
1490 failed_device_register:
1491 usb_serial_deregister(&whiteheat_fake_device);
1492 failed_fake_register:
1493 return retval;
1494 }
1495
1496
1497 static void __exit whiteheat_exit (void)
1498 {
1499 usb_deregister (&whiteheat_driver);
1500 usb_serial_deregister (&whiteheat_fake_device);
1501 usb_serial_deregister (&whiteheat_device);
1502 }
1503
1504
1505 module_init(whiteheat_init);
1506 module_exit(whiteheat_exit);
1507
1508 MODULE_AUTHOR( DRIVER_AUTHOR );
1509 MODULE_DESCRIPTION( DRIVER_DESC );
1510 MODULE_LICENSE("GPL");
1511
1512 module_param(urb_pool_size, int, 0);
1513 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1514
1515 module_param(debug, bool, S_IRUGO | S_IWUSR);
1516 MODULE_PARM_DESC(debug, "Debug enabled or not");
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