projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: serial: visor: clean up urb->status usage
[linux-block.git] / drivers / usb / serial / whiteheat.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 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>
08a2b3b6 77#include <linux/mutex.h>
1da177e4
LT		 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>
a969888c 83#include <linux/usb/serial.h>
1da177e4
LT		 84#include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
85#include "whiteheat.h" /* WhiteHEAT specific commands */
86
87static 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*/
111static struct usb_device_id id_table_std [] = {
112 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
113 { } /* Terminating entry */
114};
115
116static 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
121static 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
127MODULE_DEVICE_TABLE (usb, id_table_combined);
128
129static struct usb_driver whiteheat_driver = {
1da177e4
LT		 130 .name = "whiteheat",
131 .probe = usb_serial_probe,
132 .disconnect = usb_serial_disconnect,
133 .id_table = id_table_combined,
ba9dc657 134 .no_dynamic_id = 1,
1da177e4
LT		 135};
136
137/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
138static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
139static int whiteheat_firmware_attach (struct usb_serial *serial);
140
141/* function prototypes for the Connect Tech WhiteHEAT serial converter */
142static int whiteheat_attach (struct usb_serial *serial);
143static void whiteheat_shutdown (struct usb_serial *serial);
144static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
145static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
146static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count);
147static int whiteheat_write_room (struct usb_serial_port *port);
148static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
606d099c 149static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios * old);
1da177e4
LT		 150static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file);
151static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
152static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state);
153static int whiteheat_chars_in_buffer (struct usb_serial_port *port);
154static void whiteheat_throttle (struct usb_serial_port *port);
155static void whiteheat_unthrottle (struct usb_serial_port *port);
7d12e780
DH		 156static void whiteheat_read_callback (struct urb *urb);
157static void whiteheat_write_callback (struct urb *urb);
1da177e4 158
ea65370d 159static struct usb_serial_driver whiteheat_fake_device = {
18fcac35
GKH		 160 .driver = {
161 .owner = THIS_MODULE,
269bda1c 162 .name = "whiteheatnofirm",
18fcac35 163 },
269bda1c 164 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
d9b1b787 165 .usb_driver = &whiteheat_driver,
1da177e4
LT		 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
ea65370d 175static struct usb_serial_driver whiteheat_device = {
18fcac35
GKH		 176 .driver = {
177 .owner = THIS_MODULE,
269bda1c 178 .name = "whiteheat",
18fcac35 179 },
269bda1c 180 .description = "Connect Tech - WhiteHEAT",
d9b1b787 181 .usb_driver = &whiteheat_driver,
1da177e4
LT		 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
206struct whiteheat_command_private {
08a2b3b6 207 struct mutex mutex;
1da177e4
LT		 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
218static int urb_pool_size = 8;
219
220struct whiteheat_urb_wrap {
221 struct list_head list;
222 struct urb *urb;
223};
224
225struct 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;
c4028958 233 struct usb_serial_port *port;
1da177e4
LT		 234 struct list_head tx_urbs_free;
235 struct list_head tx_urbs_submitted;
08a2b3b6 236 struct mutex deathwarrant;
1da177e4
LT		 237};
238
239
240/* local function prototypes */
241static int start_command_port(struct usb_serial *serial);
242static void stop_command_port(struct usb_serial *serial);
7d12e780
DH		 243static void command_port_write_callback(struct urb *urb);
244static void command_port_read_callback(struct urb *urb);
1da177e4
LT		 245
246static int start_port_read(struct usb_serial_port *port);
247static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
248static struct list_head *list_first(struct list_head *head);
c4028958 249static void rx_data_softint(struct work_struct *work);
1da177e4
LT		 250
251static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
252static int firm_open(struct usb_serial_port *port);
253static int firm_close(struct usb_serial_port *port);
254static int firm_setup_port(struct usb_serial_port *port);
255static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
256static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
257static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
258static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
259static int firm_get_dtr_rts(struct usb_serial_port *port);
260static 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*/
286static 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
344static 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 *****************************************************************************/
354static 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) {
269bda1c 393 err("%s: Couldn't send command [%d]", serial->type->description, ret);
1da177e4 394 goto no_firmware;
09fd6bc8 395 } else if (alen != 2) {
269bda1c 396 err("%s: Send command incomplete [%d]", serial->type->description, alen);
1da177e4
LT		 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) {
269bda1c 405 err("%s: Couldn't get results [%d]", serial->type->description, ret);
1da177e4 406 goto no_firmware;
09fd6bc8 407 } else if (alen != sizeof(*hw_info) + 1) {
269bda1c 408 err("%s: Get results incomplete [%d]", serial->type->description, alen);
1da177e4
LT		 409 goto no_firmware;
410 } else if (result[0] != command[0]) {
269bda1c 411 err("%s: Command failed [%d]", serial->type->description, result[0]);
1da177e4
LT		 412 goto no_firmware;
413 }
414
415 hw_info = (struct whiteheat_hw_info *)&result[1];
416
269bda1c 417 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
1da177e4
LT		 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
5cbded58 423 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
1da177e4 424 if (info == NULL) {
269bda1c 425 err("%s: Out of memory for port structures\n", serial->type->description);
1da177e4
LT		 426 goto no_private;
427 }
428
429 spin_lock_init(&info->lock);
08a2b3b6 430 mutex_init(&info->deathwarrant);
1da177e4
LT		 431 info->flags = 0;
432 info->mcr = 0;
c4028958
DH		 433 INIT_WORK(&info->rx_work, rx_data_softint);
434 info->port = port;
1da177e4
LT		 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
5cbded58 495 command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
1da177e4 496 if (command_info == NULL) {
269bda1c 497 err("%s: Out of memory for port structures\n", serial->type->description);
1da177e4
LT		 498 goto no_command_private;
499 }
500
08a2b3b6 501 mutex_init(&command_info->mutex);
1da177e4
LT		 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
512no_firmware:
513 /* Firmware likely not running */
269bda1c
GKH		 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);
67ca0284 517 kfree(result);
1da177e4
LT		 518 return -ENODEV;
519
520no_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);
530no_tx_wrap:
531 kfree(urb->transfer_buffer);
532no_tx_buf:
533 usb_free_urb(urb);
534no_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);
540no_rx_wrap:
541 kfree(urb->transfer_buffer);
542no_rx_buf:
543 usb_free_urb(urb);
544no_rx_urb:
545 ;
546 }
547 kfree(info);
548no_private:
549 ;
550 }
551 kfree(result);
552no_result_buffer:
553 kfree(command);
554no_command_buffer:
555 return -ENOMEM;
556}
557
558
559static 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
602static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
603{
604 int retval = 0;
606d099c 605 struct ktermios old_term;
1da177e4
LT		 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
647exit:
648 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
649 return retval;
650}
651
652
653static 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;
1da177e4
LT		 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
08a2b3b6 688printk(KERN_ERR"Before processing rx_urbs_submitted.\n");
1da177e4 689 /* shutdown our bulk reads and writes */
08a2b3b6
ON		 690 mutex_lock(&info->deathwarrant);
691 spin_lock_irq(&info->lock);
1da177e4
LT		 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;
08a2b3b6
ON		 695 list_del(tmp);
696 spin_unlock_irq(&info->lock);
1da177e4 697 usb_kill_urb(urb);
08a2b3b6
ON		 698 spin_lock_irq(&info->lock);
699 list_add(tmp, &info->rx_urbs_free);
1da177e4 700 }
179e0917
AM		 701 list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
702 list_move(tmp, &info->rx_urbs_free);
1da177e4
LT		 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;
08a2b3b6
ON		 706 list_del(tmp);
707 spin_unlock_irq(&info->lock);
1da177e4 708 usb_kill_urb(urb);
08a2b3b6
ON		 709 spin_lock_irq(&info->lock);
710 list_add(tmp, &info->tx_urbs_free);
1da177e4 711 }
08a2b3b6
ON		 712 spin_unlock_irq(&info->lock);
713 mutex_unlock(&info->deathwarrant);
1da177e4
LT		 714
715 stop_command_port(port->serial);
716
717 port->tty->closing = 0;
718}
719
720
721static 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
780static 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
800static 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
817static 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
840static 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
08a2b3b6 885static void whiteheat_set_termios(struct usb_serial_port *port, struct ktermios *old_termios)
1da177e4
LT		 886{
887 dbg("%s -port %d", __FUNCTION__, port->number);
888
889 if ((!port->tty) || (!port->tty->termios)) {
890 dbg("%s - no tty structures", __FUNCTION__);
891 goto exit;
892 }
893
894 /* check that they really want us to change something */
895 if (old_termios) {
896 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
897 (port->tty->termios->c_iflag == old_termios->c_iflag)) {
898 dbg("%s - nothing to change...", __FUNCTION__);
899 goto exit;
900 }
901 }
902
903 firm_setup_port(port);
904
905exit:
906 return;
907}
908
909
910static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
911 firm_set_break(port, break_state);
912}
913
914
915static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
916{
917 struct whiteheat_private *info = usb_get_serial_port_data(port);
918 struct list_head *tmp;
919 struct whiteheat_urb_wrap *wrap;
920 int chars = 0;
921 unsigned long flags;
922
923 dbg("%s - port %d", __FUNCTION__, port->number);
924
925 spin_lock_irqsave(&info->lock, flags);
926 list_for_each(tmp, &info->tx_urbs_submitted) {
927 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
928 chars += wrap->urb->transfer_buffer_length;
929 }
930 spin_unlock_irqrestore(&info->lock, flags);
931
932 dbg ("%s - returns %d", __FUNCTION__, chars);
08a2b3b6 933 return chars;
1da177e4
LT		 934}
935
936
937static void whiteheat_throttle (struct usb_serial_port *port)
938{
939 struct whiteheat_private *info = usb_get_serial_port_data(port);
940 unsigned long flags;
941
942 dbg("%s - port %d", __FUNCTION__, port->number);
943
944 spin_lock_irqsave(&info->lock, flags);
945 info->flags |= THROTTLED;
946 spin_unlock_irqrestore(&info->lock, flags);
947
948 return;
949}
950
951
952static void whiteheat_unthrottle (struct usb_serial_port *port)
953{
954 struct whiteheat_private *info = usb_get_serial_port_data(port);
955 int actually_throttled;
956 unsigned long flags;
957
958 dbg("%s - port %d", __FUNCTION__, port->number);
959
960 spin_lock_irqsave(&info->lock, flags);
961 actually_throttled = info->flags & ACTUALLY_THROTTLED;
962 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
963 spin_unlock_irqrestore(&info->lock, flags);
964
965 if (actually_throttled)
c4028958 966 rx_data_softint(&info->rx_work);
1da177e4
LT		 967
968 return;
969}
970
971
972/*****************************************************************************
973 * Connect Tech's White Heat callback routines
974 *****************************************************************************/
08a2b3b6 975static void command_port_write_callback(struct urb *urb)
1da177e4
LT		 976{
977 dbg("%s", __FUNCTION__);
978
979 if (urb->status) {
980 dbg ("nonzero urb status: %d", urb->status);
981 return;
982 }
983}
984
985
08a2b3b6 986static void command_port_read_callback(struct urb *urb)
1da177e4
LT		 987{
988 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
989 struct whiteheat_command_private *command_info;
990 unsigned char *data = urb->transfer_buffer;
991 int result;
1da177e4
LT		 992
993 dbg("%s", __FUNCTION__);
994
08a2b3b6
ON		 995 command_info = usb_get_serial_port_data(command_port);
996 if (!command_info) {
997 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
998 return;
999 }
1da177e4
LT		 1000 if (urb->status) {
1001 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
08a2b3b6
ON		 1002 if (urb->status != -ENOENT)
1003 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1004 wake_up(&command_info->wait_command);
1da177e4
LT		 1005 return;
1006 }
1007
1008 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
1009
1da177e4
LT		 1010 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1011 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
08a2b3b6 1012 wake_up(&command_info->wait_command);
1da177e4
LT		 1013 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1014 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
08a2b3b6 1015 wake_up(&command_info->wait_command);
1da177e4
LT		 1016 } else if (data[0] == WHITEHEAT_EVENT) {
1017 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1018 dbg("%s - event received", __FUNCTION__);
1019 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1020 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1021 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
08a2b3b6 1022 wake_up(&command_info->wait_command);
1da177e4
LT		 1023 } else {
1024 dbg("%s - bad reply from firmware", __FUNCTION__);
1025 }
1026
1027 /* Continue trying to always read */
1028 command_port->read_urb->dev = command_port->serial->dev;
1029 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1da177e4
LT		 1030 if (result)
1031 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1032}
1033
1034
7d12e780 1035static void whiteheat_read_callback(struct urb *urb)
1da177e4
LT		 1036{
1037 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1038 struct whiteheat_urb_wrap *wrap;
1039 unsigned char *data = urb->transfer_buffer;
1040 struct whiteheat_private *info = usb_get_serial_port_data(port);
1041
1042 dbg("%s - port %d", __FUNCTION__, port->number);
1043
1044 spin_lock(&info->lock);
1045 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1046 if (!wrap) {
1047 spin_unlock(&info->lock);
1048 err("%s - Not my urb!", __FUNCTION__);
1049 return;
1050 }
1051 list_del(&wrap->list);
1052 spin_unlock(&info->lock);
1053
1054 if (urb->status) {
1055 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
1056 spin_lock(&info->lock);
1057 list_add(&wrap->list, &info->rx_urbs_free);
1058 spin_unlock(&info->lock);
1059 return;
1060 }
1061
1062 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1063
1064 spin_lock(&info->lock);
1065 list_add_tail(&wrap->list, &info->rx_urb_q);
1066 if (info->flags & THROTTLED) {
1067 info->flags |= ACTUALLY_THROTTLED;
1068 spin_unlock(&info->lock);
1069 return;
1070 }
1071 spin_unlock(&info->lock);
1072
1073 schedule_work(&info->rx_work);
1074}
1075
1076
7d12e780 1077static void whiteheat_write_callback(struct urb *urb)
1da177e4
LT		 1078{
1079 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1080 struct whiteheat_private *info = usb_get_serial_port_data(port);
1081 struct whiteheat_urb_wrap *wrap;
1082
1083 dbg("%s - port %d", __FUNCTION__, port->number);
1084
1085 spin_lock(&info->lock);
1086 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1087 if (!wrap) {
1088 spin_unlock(&info->lock);
1089 err("%s - Not my urb!", __FUNCTION__);
1090 return;
1091 }
179e0917 1092 list_move(&wrap->list, &info->tx_urbs_free);
1da177e4
LT		 1093 spin_unlock(&info->lock);
1094
1095 if (urb->status) {
1096 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1097 return;
1098 }
1099
cf2c7481 1100 usb_serial_port_softint(port);
1da177e4
LT		 1101}
1102
1103
1104/*****************************************************************************
1105 * Connect Tech's White Heat firmware interface
1106 *****************************************************************************/
08a2b3b6 1107static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1da177e4
LT		 1108{
1109 struct usb_serial_port *command_port;
1110 struct whiteheat_command_private *command_info;
1111 struct whiteheat_private *info;
1112 __u8 *transfer_buffer;
1113 int retval = 0;
08a2b3b6 1114 int t;
1da177e4
LT		 1115
1116 dbg("%s - command %d", __FUNCTION__, command);
1117
1118 command_port = port->serial->port[COMMAND_PORT];
1119 command_info = usb_get_serial_port_data(command_port);
08a2b3b6 1120 mutex_lock(&command_info->mutex);
38c3cb5b 1121 command_info->command_finished = false;
1da177e4
LT		 1122
1123 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1124 transfer_buffer[0] = command;
1125 memcpy (&transfer_buffer[1], data, datasize);
1126 command_port->write_urb->transfer_buffer_length = datasize + 1;
1127 command_port->write_urb->dev = port->serial->dev;
08a2b3b6 1128 retval = usb_submit_urb (command_port->write_urb, GFP_NOIO);
1da177e4
LT		 1129 if (retval) {
1130 dbg("%s - submit urb failed", __FUNCTION__);
1131 goto exit;
1132 }
1da177e4
LT		 1133
1134 /* wait for the command to complete */
08a2b3b6 1135 t = wait_event_timeout(command_info->wait_command,
38c3cb5b 1136 (bool)command_info->command_finished, COMMAND_TIMEOUT);
08a2b3b6
ON		 1137 if (!t)
1138 usb_kill_urb(command_port->write_urb);
1da177e4 1139
38c3cb5b 1140 if (command_info->command_finished == false) {
1da177e4
LT		 1141 dbg("%s - command timed out.", __FUNCTION__);
1142 retval = -ETIMEDOUT;
1143 goto exit;
1144 }
1145
1146 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1147 dbg("%s - command failed.", __FUNCTION__);
1148 retval = -EIO;
1149 goto exit;
1150 }
1151
1152 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1153 dbg("%s - command completed.", __FUNCTION__);
1154 switch (command) {
1155 case WHITEHEAT_GET_DTR_RTS:
1156 info = usb_get_serial_port_data(port);
1157 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1158 break;
1159 }
1160 }
1161
1162exit:
08a2b3b6 1163 mutex_unlock(&command_info->mutex);
1da177e4
LT		 1164 return retval;
1165}
1166
1167
1168static int firm_open(struct usb_serial_port *port) {
1169 struct whiteheat_simple open_command;
1170
1171 open_command.port = port->number - port->serial->minor + 1;
1172 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1173}
1174
1175
1176static int firm_close(struct usb_serial_port *port) {
1177 struct whiteheat_simple close_command;
1178
1179 close_command.port = port->number - port->serial->minor + 1;
1180 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1181}
1182
1183
1184static int firm_setup_port(struct usb_serial_port *port) {
1185 struct whiteheat_port_settings port_settings;
1186 unsigned int cflag = port->tty->termios->c_cflag;
1187
1188 port_settings.port = port->number + 1;
1189
1190 /* get the byte size */
1191 switch (cflag & CSIZE) {
1192 case CS5: port_settings.bits = 5; break;
1193 case CS6: port_settings.bits = 6; break;
1194 case CS7: port_settings.bits = 7; break;
1195 default:
1196 case CS8: port_settings.bits = 8; break;
1197 }
1198 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1199
1200 /* determine the parity */
1201 if (cflag & PARENB)
1202 if (cflag & CMSPAR)
1203 if (cflag & PARODD)
1204 port_settings.parity = WHITEHEAT_PAR_MARK;
1205 else
1206 port_settings.parity = WHITEHEAT_PAR_SPACE;
1207 else
1208 if (cflag & PARODD)
1209 port_settings.parity = WHITEHEAT_PAR_ODD;
1210 else
1211 port_settings.parity = WHITEHEAT_PAR_EVEN;
1212 else
1213 port_settings.parity = WHITEHEAT_PAR_NONE;
1214 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1215
1216 /* figure out the stop bits requested */
1217 if (cflag & CSTOPB)
1218 port_settings.stop = 2;
1219 else
1220 port_settings.stop = 1;
1221 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1222
1223 /* figure out the flow control settings */
1224 if (cflag & CRTSCTS)
1225 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1226 else
1227 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1228 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1229 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1230 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1231 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1232 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1233
1234 /* determine software flow control */
1235 if (I_IXOFF(port->tty))
1236 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1237 else
1238 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1239 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1240
1241 port_settings.xon = START_CHAR(port->tty);
1242 port_settings.xoff = STOP_CHAR(port->tty);
1243 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1244
1245 /* get the baud rate wanted */
1246 port_settings.baud = tty_get_baud_rate(port->tty);
1247 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1248
1249 /* handle any settings that aren't specified in the tty structure */
1250 port_settings.lloop = 0;
1251
1252 /* now send the message to the device */
1253 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1254}
1255
1256
1257static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1258 struct whiteheat_set_rdb rts_command;
1259
1260 rts_command.port = port->number - port->serial->minor + 1;
1261 rts_command.state = onoff;
1262 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1263}
1264
1265
1266static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1267 struct whiteheat_set_rdb dtr_command;
1268
1269 dtr_command.port = port->number - port->serial->minor + 1;
1270 dtr_command.state = onoff;
1271 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1272}
1273
1274
1275static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1276 struct whiteheat_set_rdb break_command;
1277
1278 break_command.port = port->number - port->serial->minor + 1;
1279 break_command.state = onoff;
1280 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1281}
1282
1283
1284static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1285 struct whiteheat_purge purge_command;
1286
1287 purge_command.port = port->number - port->serial->minor + 1;
1288 purge_command.what = rxtx;
1289 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1290}
1291
1292
1293static int firm_get_dtr_rts(struct usb_serial_port *port) {
1294 struct whiteheat_simple get_dr_command;
1295
1296 get_dr_command.port = port->number - port->serial->minor + 1;
1297 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1298}
1299
1300
1301static int firm_report_tx_done(struct usb_serial_port *port) {
1302 struct whiteheat_simple close_command;
1303
1304 close_command.port = port->number - port->serial->minor + 1;
1305 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1306}
1307
1308
1309/*****************************************************************************
1310 * Connect Tech's White Heat utility functions
1311 *****************************************************************************/
1312static int start_command_port(struct usb_serial *serial)
1313{
1314 struct usb_serial_port *command_port;
1315 struct whiteheat_command_private *command_info;
1da177e4
LT		 1316 int retval = 0;
1317
1318 command_port = serial->port[COMMAND_PORT];
1319 command_info = usb_get_serial_port_data(command_port);
08a2b3b6 1320 mutex_lock(&command_info->mutex);
1da177e4
LT		 1321 if (!command_info->port_running) {
1322 /* Work around HCD bugs */
1323 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1324
1325 command_port->read_urb->dev = serial->dev;
1326 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1327 if (retval) {
1328 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1329 goto exit;
1330 }
1331 }
1332 command_info->port_running++;
1333
1334exit:
08a2b3b6 1335 mutex_unlock(&command_info->mutex);
1da177e4
LT		 1336 return retval;
1337}
1338
1339
1340static void stop_command_port(struct usb_serial *serial)
1341{
1342 struct usb_serial_port *command_port;
1343 struct whiteheat_command_private *command_info;
1da177e4
LT		 1344
1345 command_port = serial->port[COMMAND_PORT];
1346 command_info = usb_get_serial_port_data(command_port);
08a2b3b6 1347 mutex_lock(&command_info->mutex);
1da177e4
LT		 1348 command_info->port_running--;
1349 if (!command_info->port_running)
1350 usb_kill_urb(command_port->read_urb);
08a2b3b6 1351 mutex_unlock(&command_info->mutex);
1da177e4
LT		 1352}
1353
1354
1355static int start_port_read(struct usb_serial_port *port)
1356{
1357 struct whiteheat_private *info = usb_get_serial_port_data(port);
1358 struct whiteheat_urb_wrap *wrap;
1359 struct urb *urb;
1360 int retval = 0;
1361 unsigned long flags;
1362 struct list_head *tmp;
1363 struct list_head *tmp2;
1364
1365 spin_lock_irqsave(&info->lock, flags);
1366
1367 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1368 list_del(tmp);
1369 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1370 urb = wrap->urb;
1371 urb->dev = port->serial->dev;
08a2b3b6 1372 spin_unlock_irqrestore(&info->lock, flags);
1da177e4
LT		 1373 retval = usb_submit_urb(urb, GFP_KERNEL);
1374 if (retval) {
08a2b3b6 1375 spin_lock_irqsave(&info->lock, flags);
1da177e4
LT		 1376 list_add(tmp, &info->rx_urbs_free);
1377 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1378 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1379 urb = wrap->urb;
08a2b3b6
ON		 1380 list_del(tmp);
1381 spin_unlock_irqrestore(&info->lock, flags);
1da177e4 1382 usb_kill_urb(urb);
08a2b3b6
ON		 1383 spin_lock_irqsave(&info->lock, flags);
1384 list_add(tmp, &info->rx_urbs_free);
1da177e4
LT		 1385 }
1386 break;
1387 }
08a2b3b6 1388 spin_lock_irqsave(&info->lock, flags);
1da177e4
LT		 1389 list_add(tmp, &info->rx_urbs_submitted);
1390 }
1391
1392 spin_unlock_irqrestore(&info->lock, flags);
1393
1394 return retval;
1395}
1396
1397
1398static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1399{
1400 struct whiteheat_urb_wrap *wrap;
1401 struct list_head *tmp;
1402
1403 list_for_each(tmp, head) {
1404 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1405 if (wrap->urb == urb)
1406 return wrap;
1407 }
1408
1409 return NULL;
1410}
1411
1412
1413static struct list_head *list_first(struct list_head *head)
1414{
1415 return head->next;
1416}
1417
1418
c4028958 1419static void rx_data_softint(struct work_struct *work)
1da177e4 1420{
c4028958
DH		 1421 struct whiteheat_private *info =
1422 container_of(work, struct whiteheat_private, rx_work);
1423 struct usb_serial_port *port = info->port;
1da177e4
LT		 1424 struct tty_struct *tty = port->tty;
1425 struct whiteheat_urb_wrap *wrap;
1426 struct urb *urb;
1427 unsigned long flags;
1428 struct list_head *tmp;
1429 struct list_head *tmp2;
1430 int result;
1431 int sent = 0;
1432
1433 spin_lock_irqsave(&info->lock, flags);
1434 if (info->flags & THROTTLED) {
1435 spin_unlock_irqrestore(&info->lock, flags);
1436 return;
1437 }
1438
1439 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1440 list_del(tmp);
1441 spin_unlock_irqrestore(&info->lock, flags);
1442
1443 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1444 urb = wrap->urb;
1445
1446 if (tty && urb->actual_length) {
33f0f88f
AC		 1447 int len = tty_buffer_request_room(tty, urb->actual_length);
1448 /* This stuff can go away now I suspect */
1449 if (unlikely(len < urb->actual_length)) {
1da177e4
LT		 1450 spin_lock_irqsave(&info->lock, flags);
1451 list_add(tmp, &info->rx_urb_q);
1452 spin_unlock_irqrestore(&info->lock, flags);
1453 tty_flip_buffer_push(tty);
1454 schedule_work(&info->rx_work);
1455 return;
1456 }
33f0f88f
AC		 1457 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1458 sent += len;
1da177e4
LT		 1459 }
1460
1461 urb->dev = port->serial->dev;
1462 result = usb_submit_urb(urb, GFP_ATOMIC);
1463 if (result) {
1464 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1465 spin_lock_irqsave(&info->lock, flags);
1466 list_add(tmp, &info->rx_urbs_free);
1467 continue;
1468 }
1469
1470 spin_lock_irqsave(&info->lock, flags);
1471 list_add(tmp, &info->rx_urbs_submitted);
1472 }
1473 spin_unlock_irqrestore(&info->lock, flags);
1474
1475 if (sent)
1476 tty_flip_buffer_push(tty);
1477}
1478
1479
1480/*****************************************************************************
1481 * Connect Tech's White Heat module functions
1482 *****************************************************************************/
1483static int __init whiteheat_init (void)
1484{
1485 int retval;
1486 retval = usb_serial_register(&whiteheat_fake_device);
1487 if (retval)
1488 goto failed_fake_register;
1489 retval = usb_serial_register(&whiteheat_device);
1490 if (retval)
1491 goto failed_device_register;
1492 retval = usb_register(&whiteheat_driver);
1493 if (retval)
1494 goto failed_usb_register;
1495 info(DRIVER_DESC " " DRIVER_VERSION);
1496 return 0;
1497failed_usb_register:
1498 usb_serial_deregister(&whiteheat_device);
1499failed_device_register:
1500 usb_serial_deregister(&whiteheat_fake_device);
1501failed_fake_register:
1502 return retval;
1503}
1504
1505
1506static void __exit whiteheat_exit (void)
1507{
1508 usb_deregister (&whiteheat_driver);
1509 usb_serial_deregister (&whiteheat_fake_device);
1510 usb_serial_deregister (&whiteheat_device);
1511}
1512
1513
1514module_init(whiteheat_init);
1515module_exit(whiteheat_exit);
1516
1517MODULE_AUTHOR( DRIVER_AUTHOR );
1518MODULE_DESCRIPTION( DRIVER_DESC );
1519MODULE_LICENSE("GPL");
1520
1521module_param(urb_pool_size, int, 0);
1522MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1523
1524module_param(debug, bool, S_IRUGO | S_IWUSR);
1525MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux 6.x block layer and io_uring tree(s)