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USB: serial: whiteheat: fix potential slab corruption
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / whiteheat.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * USB ConnectTech WhiteHEAT driver
4 *
5 * Copyright (C) 2002
6 * Connect Tech Inc.
7 *
8 * Copyright (C) 1999 - 2001
9 * Greg Kroah-Hartman (greg@kroah.com)
10 *
11 * See Documentation/usb/usb-serial.txt for more information on using this
12 * driver
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/slab.h>
18 #include <linux/tty.h>
19 #include <linux/tty_driver.h>
20 #include <linux/tty_flip.h>
21 #include <linux/module.h>
22 #include <linux/spinlock.h>
23 #include <linux/mutex.h>
24 #include <linux/uaccess.h>
25 #include <asm/termbits.h>
26 #include <linux/usb.h>
27 #include <linux/serial_reg.h>
28 #include <linux/serial.h>
29 #include <linux/usb/serial.h>
30 #include <linux/usb/ezusb.h>
31 #include "whiteheat.h" /* WhiteHEAT specific commands */
32
33 #ifndef CMSPAR
34 #define CMSPAR 0
35 #endif
36
37 /*
38 * Version Information
39 */
40 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
41 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
42
43 #define CONNECT_TECH_VENDOR_ID 0x0710
44 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
45 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
46
47 /*
48 ID tables for whiteheat are unusual, because we want to different
49 things for different versions of the device. Eventually, this
50 will be doable from a single table. But, for now, we define two
51 separate ID tables, and then a third table that combines them
52 just for the purpose of exporting the autoloading information.
53 */
54 static const struct usb_device_id id_table_std[] = {
55 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
56 { } /* Terminating entry */
57 };
58
59 static const struct usb_device_id id_table_prerenumeration[] = {
60 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
61 { } /* Terminating entry */
62 };
63
64 static const struct usb_device_id id_table_combined[] = {
65 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
66 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
67 { } /* Terminating entry */
68 };
69
70 MODULE_DEVICE_TABLE(usb, id_table_combined);
71
72
73 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
74 static int whiteheat_firmware_download(struct usb_serial *serial,
75 const struct usb_device_id *id);
76 static int whiteheat_firmware_attach(struct usb_serial *serial);
77
78 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
79 static int whiteheat_attach(struct usb_serial *serial);
80 static void whiteheat_release(struct usb_serial *serial);
81 static int whiteheat_port_probe(struct usb_serial_port *port);
82 static int whiteheat_port_remove(struct usb_serial_port *port);
83 static int whiteheat_open(struct tty_struct *tty,
84 struct usb_serial_port *port);
85 static void whiteheat_close(struct usb_serial_port *port);
86 static int whiteheat_ioctl(struct tty_struct *tty,
87 unsigned int cmd, unsigned long arg);
88 static void whiteheat_set_termios(struct tty_struct *tty,
89 struct usb_serial_port *port, struct ktermios *old);
90 static int whiteheat_tiocmget(struct tty_struct *tty);
91 static int whiteheat_tiocmset(struct tty_struct *tty,
92 unsigned int set, unsigned int clear);
93 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
94
95 static struct usb_serial_driver whiteheat_fake_device = {
96 .driver = {
97 .owner = THIS_MODULE,
98 .name = "whiteheatnofirm",
99 },
100 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
101 .id_table = id_table_prerenumeration,
102 .num_ports = 1,
103 .probe = whiteheat_firmware_download,
104 .attach = whiteheat_firmware_attach,
105 };
106
107 static struct usb_serial_driver whiteheat_device = {
108 .driver = {
109 .owner = THIS_MODULE,
110 .name = "whiteheat",
111 },
112 .description = "Connect Tech - WhiteHEAT",
113 .id_table = id_table_std,
114 .num_ports = 4,
115 .num_bulk_in = 5,
116 .num_bulk_out = 5,
117 .attach = whiteheat_attach,
118 .release = whiteheat_release,
119 .port_probe = whiteheat_port_probe,
120 .port_remove = whiteheat_port_remove,
121 .open = whiteheat_open,
122 .close = whiteheat_close,
123 .ioctl = whiteheat_ioctl,
124 .set_termios = whiteheat_set_termios,
125 .break_ctl = whiteheat_break_ctl,
126 .tiocmget = whiteheat_tiocmget,
127 .tiocmset = whiteheat_tiocmset,
128 .throttle = usb_serial_generic_throttle,
129 .unthrottle = usb_serial_generic_unthrottle,
130 };
131
132 static struct usb_serial_driver * const serial_drivers[] = {
133 &whiteheat_fake_device, &whiteheat_device, NULL
134 };
135
136 struct whiteheat_command_private {
137 struct mutex mutex;
138 __u8 port_running;
139 __u8 command_finished;
140 wait_queue_head_t wait_command; /* for handling sleeping whilst
141 waiting for a command to
142 finish */
143 __u8 result_buffer[64];
144 };
145
146 struct whiteheat_private {
147 __u8 mcr; /* FIXME: no locking on mcr */
148 };
149
150
151 /* local function prototypes */
152 static int start_command_port(struct usb_serial *serial);
153 static void stop_command_port(struct usb_serial *serial);
154 static void command_port_write_callback(struct urb *urb);
155 static void command_port_read_callback(struct urb *urb);
156
157 static int firm_send_command(struct usb_serial_port *port, __u8 command,
158 __u8 *data, __u8 datasize);
159 static int firm_open(struct usb_serial_port *port);
160 static int firm_close(struct usb_serial_port *port);
161 static void firm_setup_port(struct tty_struct *tty);
162 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
163 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
164 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
165 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
166 static int firm_get_dtr_rts(struct usb_serial_port *port);
167 static int firm_report_tx_done(struct usb_serial_port *port);
168
169
170 #define COMMAND_PORT 4
171 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
172 #define COMMAND_TIMEOUT_MS 2000
173 #define CLOSING_DELAY (30 * HZ)
174
175
176 /*****************************************************************************
177 * Connect Tech's White Heat prerenumeration driver functions
178 *****************************************************************************/
179
180 /* steps to download the firmware to the WhiteHEAT device:
181 - hold the reset (by writing to the reset bit of the CPUCS register)
182 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
183 - release the reset (by writing to the CPUCS register)
184 - download the WH.HEX file for all addresses greater than 0x1b3f using
185 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
186 - hold the reset
187 - download the WH.HEX file for all addresses less than 0x1b40 using
188 VENDOR_REQUEST_ANCHOR_LOAD
189 - release the reset
190 - device renumerated itself and comes up as new device id with all
191 firmware download completed.
192 */
193 static int whiteheat_firmware_download(struct usb_serial *serial,
194 const struct usb_device_id *id)
195 {
196 int response;
197
198 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
199 if (response >= 0) {
200 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
201 if (response >= 0)
202 return 0;
203 }
204 return -ENOENT;
205 }
206
207
208 static int whiteheat_firmware_attach(struct usb_serial *serial)
209 {
210 /* We want this device to fail to have a driver assigned to it */
211 return 1;
212 }
213
214
215 /*****************************************************************************
216 * Connect Tech's White Heat serial driver functions
217 *****************************************************************************/
218
219 static int whiteheat_attach(struct usb_serial *serial)
220 {
221 struct usb_serial_port *command_port;
222 struct whiteheat_command_private *command_info;
223 struct whiteheat_hw_info *hw_info;
224 int pipe;
225 int ret;
226 int alen;
227 __u8 *command;
228 __u8 *result;
229
230 command_port = serial->port[COMMAND_PORT];
231
232 pipe = usb_sndbulkpipe(serial->dev,
233 command_port->bulk_out_endpointAddress);
234 command = kmalloc(2, GFP_KERNEL);
235 if (!command)
236 goto no_command_buffer;
237 command[0] = WHITEHEAT_GET_HW_INFO;
238 command[1] = 0;
239
240 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
241 if (!result)
242 goto no_result_buffer;
243 /*
244 * When the module is reloaded the firmware is still there and
245 * the endpoints are still in the usb core unchanged. This is the
246 * unlinking bug in disguise. Same for the call below.
247 */
248 usb_clear_halt(serial->dev, pipe);
249 ret = usb_bulk_msg(serial->dev, pipe, command, 2,
250 &alen, COMMAND_TIMEOUT_MS);
251 if (ret) {
252 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
253 serial->type->description, ret);
254 goto no_firmware;
255 } else if (alen != 2) {
256 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
257 serial->type->description, alen);
258 goto no_firmware;
259 }
260
261 pipe = usb_rcvbulkpipe(serial->dev,
262 command_port->bulk_in_endpointAddress);
263 /* See the comment on the usb_clear_halt() above */
264 usb_clear_halt(serial->dev, pipe);
265 ret = usb_bulk_msg(serial->dev, pipe, result,
266 sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
267 if (ret) {
268 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
269 serial->type->description, ret);
270 goto no_firmware;
271 } else if (alen != sizeof(*hw_info) + 1) {
272 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
273 serial->type->description, alen);
274 goto no_firmware;
275 } else if (result[0] != command[0]) {
276 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
277 serial->type->description, result[0]);
278 goto no_firmware;
279 }
280
281 hw_info = (struct whiteheat_hw_info *)&result[1];
282
283 dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n",
284 serial->type->description,
285 hw_info->sw_major_rev, hw_info->sw_minor_rev);
286
287 command_info = kmalloc(sizeof(struct whiteheat_command_private),
288 GFP_KERNEL);
289 if (!command_info)
290 goto no_command_private;
291
292 mutex_init(&command_info->mutex);
293 command_info->port_running = 0;
294 init_waitqueue_head(&command_info->wait_command);
295 usb_set_serial_port_data(command_port, command_info);
296 command_port->write_urb->complete = command_port_write_callback;
297 command_port->read_urb->complete = command_port_read_callback;
298 kfree(result);
299 kfree(command);
300
301 return 0;
302
303 no_firmware:
304 /* Firmware likely not running */
305 dev_err(&serial->dev->dev,
306 "%s: Unable to retrieve firmware version, try replugging\n",
307 serial->type->description);
308 dev_err(&serial->dev->dev,
309 "%s: If the firmware is not running (status led not blinking)\n",
310 serial->type->description);
311 dev_err(&serial->dev->dev,
312 "%s: please contact support@connecttech.com\n",
313 serial->type->description);
314 kfree(result);
315 kfree(command);
316 return -ENODEV;
317
318 no_command_private:
319 kfree(result);
320 no_result_buffer:
321 kfree(command);
322 no_command_buffer:
323 return -ENOMEM;
324 }
325
326 static void whiteheat_release(struct usb_serial *serial)
327 {
328 struct usb_serial_port *command_port;
329
330 /* free up our private data for our command port */
331 command_port = serial->port[COMMAND_PORT];
332 kfree(usb_get_serial_port_data(command_port));
333 }
334
335 static int whiteheat_port_probe(struct usb_serial_port *port)
336 {
337 struct whiteheat_private *info;
338
339 info = kzalloc(sizeof(*info), GFP_KERNEL);
340 if (!info)
341 return -ENOMEM;
342
343 usb_set_serial_port_data(port, info);
344
345 return 0;
346 }
347
348 static int whiteheat_port_remove(struct usb_serial_port *port)
349 {
350 struct whiteheat_private *info;
351
352 info = usb_get_serial_port_data(port);
353 kfree(info);
354
355 return 0;
356 }
357
358 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
359 {
360 int retval;
361
362 retval = start_command_port(port->serial);
363 if (retval)
364 goto exit;
365
366 /* send an open port command */
367 retval = firm_open(port);
368 if (retval) {
369 stop_command_port(port->serial);
370 goto exit;
371 }
372
373 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
374 if (retval) {
375 firm_close(port);
376 stop_command_port(port->serial);
377 goto exit;
378 }
379
380 if (tty)
381 firm_setup_port(tty);
382
383 /* Work around HCD bugs */
384 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
385 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
386
387 retval = usb_serial_generic_open(tty, port);
388 if (retval) {
389 firm_close(port);
390 stop_command_port(port->serial);
391 goto exit;
392 }
393 exit:
394 return retval;
395 }
396
397
398 static void whiteheat_close(struct usb_serial_port *port)
399 {
400 firm_report_tx_done(port);
401 firm_close(port);
402
403 usb_serial_generic_close(port);
404
405 stop_command_port(port->serial);
406 }
407
408 static int whiteheat_tiocmget(struct tty_struct *tty)
409 {
410 struct usb_serial_port *port = tty->driver_data;
411 struct whiteheat_private *info = usb_get_serial_port_data(port);
412 unsigned int modem_signals = 0;
413
414 firm_get_dtr_rts(port);
415 if (info->mcr & UART_MCR_DTR)
416 modem_signals |= TIOCM_DTR;
417 if (info->mcr & UART_MCR_RTS)
418 modem_signals |= TIOCM_RTS;
419
420 return modem_signals;
421 }
422
423 static int whiteheat_tiocmset(struct tty_struct *tty,
424 unsigned int set, unsigned int clear)
425 {
426 struct usb_serial_port *port = tty->driver_data;
427 struct whiteheat_private *info = usb_get_serial_port_data(port);
428
429 if (set & TIOCM_RTS)
430 info->mcr |= UART_MCR_RTS;
431 if (set & TIOCM_DTR)
432 info->mcr |= UART_MCR_DTR;
433
434 if (clear & TIOCM_RTS)
435 info->mcr &= ~UART_MCR_RTS;
436 if (clear & TIOCM_DTR)
437 info->mcr &= ~UART_MCR_DTR;
438
439 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
440 firm_set_rts(port, info->mcr & UART_MCR_RTS);
441 return 0;
442 }
443
444
445 static int whiteheat_ioctl(struct tty_struct *tty,
446 unsigned int cmd, unsigned long arg)
447 {
448 struct usb_serial_port *port = tty->driver_data;
449 struct serial_struct serstruct;
450 void __user *user_arg = (void __user *)arg;
451
452 switch (cmd) {
453 case TIOCGSERIAL:
454 memset(&serstruct, 0, sizeof(serstruct));
455 serstruct.type = PORT_16654;
456 serstruct.line = port->minor;
457 serstruct.port = port->port_number;
458 serstruct.xmit_fifo_size = kfifo_size(&port->write_fifo);
459 serstruct.custom_divisor = 0;
460 serstruct.baud_base = 460800;
461 serstruct.close_delay = CLOSING_DELAY;
462 serstruct.closing_wait = CLOSING_DELAY;
463
464 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
465 return -EFAULT;
466 break;
467 default:
468 break;
469 }
470
471 return -ENOIOCTLCMD;
472 }
473
474
475 static void whiteheat_set_termios(struct tty_struct *tty,
476 struct usb_serial_port *port, struct ktermios *old_termios)
477 {
478 firm_setup_port(tty);
479 }
480
481 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
482 {
483 struct usb_serial_port *port = tty->driver_data;
484 firm_set_break(port, break_state);
485 }
486
487
488 /*****************************************************************************
489 * Connect Tech's White Heat callback routines
490 *****************************************************************************/
491 static void command_port_write_callback(struct urb *urb)
492 {
493 int status = urb->status;
494
495 if (status) {
496 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status);
497 return;
498 }
499 }
500
501
502 static void command_port_read_callback(struct urb *urb)
503 {
504 struct usb_serial_port *command_port = urb->context;
505 struct whiteheat_command_private *command_info;
506 int status = urb->status;
507 unsigned char *data = urb->transfer_buffer;
508 int result;
509
510 command_info = usb_get_serial_port_data(command_port);
511 if (!command_info) {
512 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
513 return;
514 }
515 if (!urb->actual_length) {
516 dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__);
517 return;
518 }
519 if (status) {
520 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
521 if (status != -ENOENT)
522 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
523 wake_up(&command_info->wait_command);
524 return;
525 }
526
527 usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data);
528
529 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
530 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
531 wake_up(&command_info->wait_command);
532 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
533 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
534 wake_up(&command_info->wait_command);
535 } else if (data[0] == WHITEHEAT_EVENT) {
536 /* These are unsolicited reports from the firmware, hence no
537 waiting command to wakeup */
538 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
539 } else if ((data[0] == WHITEHEAT_GET_DTR_RTS) &&
540 (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
541 memcpy(command_info->result_buffer, &data[1],
542 urb->actual_length - 1);
543 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
544 wake_up(&command_info->wait_command);
545 } else
546 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
547
548 /* Continue trying to always read */
549 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
550 if (result)
551 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
552 __func__, result);
553 }
554
555
556 /*****************************************************************************
557 * Connect Tech's White Heat firmware interface
558 *****************************************************************************/
559 static int firm_send_command(struct usb_serial_port *port, __u8 command,
560 __u8 *data, __u8 datasize)
561 {
562 struct usb_serial_port *command_port;
563 struct whiteheat_command_private *command_info;
564 struct whiteheat_private *info;
565 struct device *dev = &port->dev;
566 __u8 *transfer_buffer;
567 int retval = 0;
568 int t;
569
570 dev_dbg(dev, "%s - command %d\n", __func__, command);
571
572 command_port = port->serial->port[COMMAND_PORT];
573 command_info = usb_get_serial_port_data(command_port);
574
575 if (command_port->bulk_out_size < datasize + 1)
576 return -EIO;
577
578 mutex_lock(&command_info->mutex);
579 command_info->command_finished = false;
580
581 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
582 transfer_buffer[0] = command;
583 memcpy(&transfer_buffer[1], data, datasize);
584 command_port->write_urb->transfer_buffer_length = datasize + 1;
585 retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
586 if (retval) {
587 dev_dbg(dev, "%s - submit urb failed\n", __func__);
588 goto exit;
589 }
590
591 /* wait for the command to complete */
592 t = wait_event_timeout(command_info->wait_command,
593 (bool)command_info->command_finished, COMMAND_TIMEOUT);
594 if (!t)
595 usb_kill_urb(command_port->write_urb);
596
597 if (command_info->command_finished == false) {
598 dev_dbg(dev, "%s - command timed out.\n", __func__);
599 retval = -ETIMEDOUT;
600 goto exit;
601 }
602
603 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
604 dev_dbg(dev, "%s - command failed.\n", __func__);
605 retval = -EIO;
606 goto exit;
607 }
608
609 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
610 dev_dbg(dev, "%s - command completed.\n", __func__);
611 switch (command) {
612 case WHITEHEAT_GET_DTR_RTS:
613 info = usb_get_serial_port_data(port);
614 memcpy(&info->mcr, command_info->result_buffer,
615 sizeof(struct whiteheat_dr_info));
616 break;
617 }
618 }
619 exit:
620 mutex_unlock(&command_info->mutex);
621 return retval;
622 }
623
624
625 static int firm_open(struct usb_serial_port *port)
626 {
627 struct whiteheat_simple open_command;
628
629 open_command.port = port->port_number + 1;
630 return firm_send_command(port, WHITEHEAT_OPEN,
631 (__u8 *)&open_command, sizeof(open_command));
632 }
633
634
635 static int firm_close(struct usb_serial_port *port)
636 {
637 struct whiteheat_simple close_command;
638
639 close_command.port = port->port_number + 1;
640 return firm_send_command(port, WHITEHEAT_CLOSE,
641 (__u8 *)&close_command, sizeof(close_command));
642 }
643
644
645 static void firm_setup_port(struct tty_struct *tty)
646 {
647 struct usb_serial_port *port = tty->driver_data;
648 struct device *dev = &port->dev;
649 struct whiteheat_port_settings port_settings;
650 unsigned int cflag = tty->termios.c_cflag;
651
652 port_settings.port = port->port_number + 1;
653
654 /* get the byte size */
655 switch (cflag & CSIZE) {
656 case CS5: port_settings.bits = 5; break;
657 case CS6: port_settings.bits = 6; break;
658 case CS7: port_settings.bits = 7; break;
659 default:
660 case CS8: port_settings.bits = 8; break;
661 }
662 dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
663
664 /* determine the parity */
665 if (cflag & PARENB)
666 if (cflag & CMSPAR)
667 if (cflag & PARODD)
668 port_settings.parity = WHITEHEAT_PAR_MARK;
669 else
670 port_settings.parity = WHITEHEAT_PAR_SPACE;
671 else
672 if (cflag & PARODD)
673 port_settings.parity = WHITEHEAT_PAR_ODD;
674 else
675 port_settings.parity = WHITEHEAT_PAR_EVEN;
676 else
677 port_settings.parity = WHITEHEAT_PAR_NONE;
678 dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
679
680 /* figure out the stop bits requested */
681 if (cflag & CSTOPB)
682 port_settings.stop = 2;
683 else
684 port_settings.stop = 1;
685 dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop);
686
687 /* figure out the flow control settings */
688 if (cflag & CRTSCTS)
689 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
690 WHITEHEAT_HFLOW_RTS);
691 else
692 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
693 dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__,
694 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
695 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
696 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
697 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
698
699 /* determine software flow control */
700 if (I_IXOFF(tty))
701 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
702 else
703 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
704 dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
705
706 port_settings.xon = START_CHAR(tty);
707 port_settings.xoff = STOP_CHAR(tty);
708 dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
709
710 /* get the baud rate wanted */
711 port_settings.baud = tty_get_baud_rate(tty);
712 dev_dbg(dev, "%s - baud rate = %d\n", __func__, port_settings.baud);
713
714 /* fixme: should set validated settings */
715 tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
716 /* handle any settings that aren't specified in the tty structure */
717 port_settings.lloop = 0;
718
719 /* now send the message to the device */
720 firm_send_command(port, WHITEHEAT_SETUP_PORT,
721 (__u8 *)&port_settings, sizeof(port_settings));
722 }
723
724
725 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
726 {
727 struct whiteheat_set_rdb rts_command;
728
729 rts_command.port = port->port_number + 1;
730 rts_command.state = onoff;
731 return firm_send_command(port, WHITEHEAT_SET_RTS,
732 (__u8 *)&rts_command, sizeof(rts_command));
733 }
734
735
736 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
737 {
738 struct whiteheat_set_rdb dtr_command;
739
740 dtr_command.port = port->port_number + 1;
741 dtr_command.state = onoff;
742 return firm_send_command(port, WHITEHEAT_SET_DTR,
743 (__u8 *)&dtr_command, sizeof(dtr_command));
744 }
745
746
747 static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
748 {
749 struct whiteheat_set_rdb break_command;
750
751 break_command.port = port->port_number + 1;
752 break_command.state = onoff;
753 return firm_send_command(port, WHITEHEAT_SET_BREAK,
754 (__u8 *)&break_command, sizeof(break_command));
755 }
756
757
758 static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
759 {
760 struct whiteheat_purge purge_command;
761
762 purge_command.port = port->port_number + 1;
763 purge_command.what = rxtx;
764 return firm_send_command(port, WHITEHEAT_PURGE,
765 (__u8 *)&purge_command, sizeof(purge_command));
766 }
767
768
769 static int firm_get_dtr_rts(struct usb_serial_port *port)
770 {
771 struct whiteheat_simple get_dr_command;
772
773 get_dr_command.port = port->port_number + 1;
774 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
775 (__u8 *)&get_dr_command, sizeof(get_dr_command));
776 }
777
778
779 static int firm_report_tx_done(struct usb_serial_port *port)
780 {
781 struct whiteheat_simple close_command;
782
783 close_command.port = port->port_number + 1;
784 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
785 (__u8 *)&close_command, sizeof(close_command));
786 }
787
788
789 /*****************************************************************************
790 * Connect Tech's White Heat utility functions
791 *****************************************************************************/
792 static int start_command_port(struct usb_serial *serial)
793 {
794 struct usb_serial_port *command_port;
795 struct whiteheat_command_private *command_info;
796 int retval = 0;
797
798 command_port = serial->port[COMMAND_PORT];
799 command_info = usb_get_serial_port_data(command_port);
800 mutex_lock(&command_info->mutex);
801 if (!command_info->port_running) {
802 /* Work around HCD bugs */
803 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
804
805 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
806 if (retval) {
807 dev_err(&serial->dev->dev,
808 "%s - failed submitting read urb, error %d\n",
809 __func__, retval);
810 goto exit;
811 }
812 }
813 command_info->port_running++;
814
815 exit:
816 mutex_unlock(&command_info->mutex);
817 return retval;
818 }
819
820
821 static void stop_command_port(struct usb_serial *serial)
822 {
823 struct usb_serial_port *command_port;
824 struct whiteheat_command_private *command_info;
825
826 command_port = serial->port[COMMAND_PORT];
827 command_info = usb_get_serial_port_data(command_port);
828 mutex_lock(&command_info->mutex);
829 command_info->port_running--;
830 if (!command_info->port_running)
831 usb_kill_urb(command_port->read_urb);
832 mutex_unlock(&command_info->mutex);
833 }
834
835 module_usb_serial_driver(serial_drivers, id_table_combined);
836
837 MODULE_AUTHOR(DRIVER_AUTHOR);
838 MODULE_DESCRIPTION(DRIVER_DESC);
839 MODULE_LICENSE("GPL");
840
841 MODULE_FIRMWARE("whiteheat.fw");
842 MODULE_FIRMWARE("whiteheat_loader.fw");
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