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[PATCH] USB: move usb-serial.h to include/linux/usb/
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / whiteheat.c
blob6e6c7934be32f819a08286e474e5ec31bd98fd4e
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 <asm/uaccess.h>
78 #include <asm/termbits.h>
79 #include <linux/usb.h>
80 #include <linux/serial_reg.h>
81 #include <linux/serial.h>
82 #include <linux/usb/serial.h>
83 #include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
84 #include "whiteheat.h" /* WhiteHEAT specific commands */
85
86 static int debug;
87
88 #ifndef CMSPAR
89 #define CMSPAR 0
90 #endif
91
92 /*
93 * Version Information
94 */
95 #define DRIVER_VERSION "v2.0"
96 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
97 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
98
99 #define CONNECT_TECH_VENDOR_ID 0x0710
100 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
101 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
102
103 /*
104 ID tables for whiteheat are unusual, because we want to different
105 things for different versions of the device. Eventually, this
106 will be doable from a single table. But, for now, we define two
107 separate ID tables, and then a third table that combines them
108 just for the purpose of exporting the autoloading information.
109 */
110 static struct usb_device_id id_table_std [] = {
111 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
112 { } /* Terminating entry */
113 };
114
115 static struct usb_device_id id_table_prerenumeration [] = {
116 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
117 { } /* Terminating entry */
118 };
119
120 static struct usb_device_id id_table_combined [] = {
121 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
123 { } /* Terminating entry */
124 };
125
126 MODULE_DEVICE_TABLE (usb, id_table_combined);
127
128 static struct usb_driver whiteheat_driver = {
129 .name = "whiteheat",
130 .probe = usb_serial_probe,
131 .disconnect = usb_serial_disconnect,
132 .id_table = id_table_combined,
133 .no_dynamic_id = 1,
134 };
135
136 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
137 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
138 static int whiteheat_firmware_attach (struct usb_serial *serial);
139
140 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
141 static int whiteheat_attach (struct usb_serial *serial);
142 static void whiteheat_shutdown (struct usb_serial *serial);
143 static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
144 static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
145 static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count);
146 static int whiteheat_write_room (struct usb_serial_port *port);
147 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
148 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old);
149 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file);
150 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
151 static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state);
152 static int whiteheat_chars_in_buffer (struct usb_serial_port *port);
153 static void whiteheat_throttle (struct usb_serial_port *port);
154 static void whiteheat_unthrottle (struct usb_serial_port *port);
155 static void whiteheat_read_callback (struct urb *urb, struct pt_regs *regs);
156 static void whiteheat_write_callback (struct urb *urb, struct pt_regs *regs);
157
158 static struct usb_serial_driver whiteheat_fake_device = {
159 .driver = {
160 .owner = THIS_MODULE,
161 .name = "whiteheatnofirm",
162 },
163 .description = "Connect Tech - WhiteHEAT - (prerenumeration)",
164 .id_table = id_table_prerenumeration,
165 .num_interrupt_in = NUM_DONT_CARE,
166 .num_bulk_in = NUM_DONT_CARE,
167 .num_bulk_out = NUM_DONT_CARE,
168 .num_ports = 1,
169 .probe = whiteheat_firmware_download,
170 .attach = whiteheat_firmware_attach,
171 };
172
173 static struct usb_serial_driver whiteheat_device = {
174 .driver = {
175 .owner = THIS_MODULE,
176 .name = "whiteheat",
177 },
178 .description = "Connect Tech - WhiteHEAT",
179 .id_table = id_table_std,
180 .num_interrupt_in = NUM_DONT_CARE,
181 .num_bulk_in = NUM_DONT_CARE,
182 .num_bulk_out = NUM_DONT_CARE,
183 .num_ports = 4,
184 .attach = whiteheat_attach,
185 .shutdown = whiteheat_shutdown,
186 .open = whiteheat_open,
187 .close = whiteheat_close,
188 .write = whiteheat_write,
189 .write_room = whiteheat_write_room,
190 .ioctl = whiteheat_ioctl,
191 .set_termios = whiteheat_set_termios,
192 .break_ctl = whiteheat_break_ctl,
193 .tiocmget = whiteheat_tiocmget,
194 .tiocmset = whiteheat_tiocmset,
195 .chars_in_buffer = whiteheat_chars_in_buffer,
196 .throttle = whiteheat_throttle,
197 .unthrottle = whiteheat_unthrottle,
198 .read_bulk_callback = whiteheat_read_callback,
199 .write_bulk_callback = whiteheat_write_callback,
200 };
201
202
203 struct whiteheat_command_private {
204 spinlock_t lock;
205 __u8 port_running;
206 __u8 command_finished;
207 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
208 __u8 result_buffer[64];
209 };
210
211
212 #define THROTTLED 0x01
213 #define ACTUALLY_THROTTLED 0x02
214
215 static int urb_pool_size = 8;
216
217 struct whiteheat_urb_wrap {
218 struct list_head list;
219 struct urb *urb;
220 };
221
222 struct whiteheat_private {
223 spinlock_t lock;
224 __u8 flags;
225 __u8 mcr;
226 struct list_head rx_urbs_free;
227 struct list_head rx_urbs_submitted;
228 struct list_head rx_urb_q;
229 struct work_struct rx_work;
230 struct list_head tx_urbs_free;
231 struct list_head tx_urbs_submitted;
232 };
233
234
235 /* local function prototypes */
236 static int start_command_port(struct usb_serial *serial);
237 static void stop_command_port(struct usb_serial *serial);
238 static void command_port_write_callback(struct urb *urb, struct pt_regs *regs);
239 static void command_port_read_callback(struct urb *urb, struct pt_regs *regs);
240
241 static int start_port_read(struct usb_serial_port *port);
242 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
243 static struct list_head *list_first(struct list_head *head);
244 static void rx_data_softint(void *private);
245
246 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
247 static int firm_open(struct usb_serial_port *port);
248 static int firm_close(struct usb_serial_port *port);
249 static int firm_setup_port(struct usb_serial_port *port);
250 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
251 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
252 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
253 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
254 static int firm_get_dtr_rts(struct usb_serial_port *port);
255 static int firm_report_tx_done(struct usb_serial_port *port);
256
257
258 #define COMMAND_PORT 4
259 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
260 #define COMMAND_TIMEOUT_MS 2000
261 #define CLOSING_DELAY (30 * HZ)
262
263
264 /*****************************************************************************
265 * Connect Tech's White Heat prerenumeration driver functions
266 *****************************************************************************/
267
268 /* steps to download the firmware to the WhiteHEAT device:
269 - hold the reset (by writing to the reset bit of the CPUCS register)
270 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
271 - release the reset (by writing to the CPUCS register)
272 - download the WH.HEX file for all addresses greater than 0x1b3f using
273 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
274 - hold the reset
275 - download the WH.HEX file for all addresses less than 0x1b40 using
276 VENDOR_REQUEST_ANCHOR_LOAD
277 - release the reset
278 - device renumerated itself and comes up as new device id with all
279 firmware download completed.
280 */
281 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
282 {
283 int response;
284 const struct whiteheat_hex_record *record;
285
286 dbg("%s", __FUNCTION__);
287
288 response = ezusb_set_reset (serial, 1);
289
290 record = &whiteheat_loader[0];
291 while (record->address != 0xffff) {
292 response = ezusb_writememory (serial, record->address,
293 (unsigned char *)record->data, record->data_size, 0xa0);
294 if (response < 0) {
295 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
296 __FUNCTION__, response, record->address, record->data, record->data_size);
297 break;
298 }
299 ++record;
300 }
301
302 response = ezusb_set_reset (serial, 0);
303
304 record = &whiteheat_firmware[0];
305 while (record->address < 0x1b40) {
306 ++record;
307 }
308 while (record->address != 0xffff) {
309 response = ezusb_writememory (serial, record->address,
310 (unsigned char *)record->data, record->data_size, 0xa3);
311 if (response < 0) {
312 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
313 __FUNCTION__, response, record->address, record->data, record->data_size);
314 break;
315 }
316 ++record;
317 }
318
319 response = ezusb_set_reset (serial, 1);
320
321 record = &whiteheat_firmware[0];
322 while (record->address < 0x1b40) {
323 response = ezusb_writememory (serial, record->address,
324 (unsigned char *)record->data, record->data_size, 0xa0);
325 if (response < 0) {
326 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
327 __FUNCTION__, response, record->address, record->data, record->data_size);
328 break;
329 }
330 ++record;
331 }
332
333 response = ezusb_set_reset (serial, 0);
334
335 return 0;
336 }
337
338
339 static int whiteheat_firmware_attach (struct usb_serial *serial)
340 {
341 /* We want this device to fail to have a driver assigned to it */
342 return 1;
343 }
344
345
346 /*****************************************************************************
347 * Connect Tech's White Heat serial driver functions
348 *****************************************************************************/
349 static int whiteheat_attach (struct usb_serial *serial)
350 {
351 struct usb_serial_port *command_port;
352 struct whiteheat_command_private *command_info;
353 struct usb_serial_port *port;
354 struct whiteheat_private *info;
355 struct whiteheat_hw_info *hw_info;
356 int pipe;
357 int ret;
358 int alen;
359 __u8 *command;
360 __u8 *result;
361 int i;
362 int j;
363 struct urb *urb;
364 int buf_size;
365 struct whiteheat_urb_wrap *wrap;
366 struct list_head *tmp;
367
368 command_port = serial->port[COMMAND_PORT];
369
370 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
371 command = kmalloc(2, GFP_KERNEL);
372 if (!command)
373 goto no_command_buffer;
374 command[0] = WHITEHEAT_GET_HW_INFO;
375 command[1] = 0;
376
377 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
378 if (!result)
379 goto no_result_buffer;
380 /*
381 * When the module is reloaded the firmware is still there and
382 * the endpoints are still in the usb core unchanged. This is the
383 * unlinking bug in disguise. Same for the call below.
384 */
385 usb_clear_halt(serial->dev, pipe);
386 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
387 if (ret) {
388 err("%s: Couldn't send command [%d]", serial->type->description, ret);
389 goto no_firmware;
390 } else if (alen != 2) {
391 err("%s: Send command incomplete [%d]", serial->type->description, alen);
392 goto no_firmware;
393 }
394
395 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
396 /* See the comment on the usb_clear_halt() above */
397 usb_clear_halt(serial->dev, pipe);
398 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
399 if (ret) {
400 err("%s: Couldn't get results [%d]", serial->type->description, ret);
401 goto no_firmware;
402 } else if (alen != sizeof(*hw_info) + 1) {
403 err("%s: Get results incomplete [%d]", serial->type->description, alen);
404 goto no_firmware;
405 } else if (result[0] != command[0]) {
406 err("%s: Command failed [%d]", serial->type->description, result[0]);
407 goto no_firmware;
408 }
409
410 hw_info = (struct whiteheat_hw_info *)&result[1];
411
412 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
413 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
414
415 for (i = 0; i < serial->num_ports; i++) {
416 port = serial->port[i];
417
418 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
419 if (info == NULL) {
420 err("%s: Out of memory for port structures\n", serial->type->description);
421 goto no_private;
422 }
423
424 spin_lock_init(&info->lock);
425 info->flags = 0;
426 info->mcr = 0;
427 INIT_WORK(&info->rx_work, rx_data_softint, port);
428
429 INIT_LIST_HEAD(&info->rx_urbs_free);
430 INIT_LIST_HEAD(&info->rx_urbs_submitted);
431 INIT_LIST_HEAD(&info->rx_urb_q);
432 INIT_LIST_HEAD(&info->tx_urbs_free);
433 INIT_LIST_HEAD(&info->tx_urbs_submitted);
434
435 for (j = 0; j < urb_pool_size; j++) {
436 urb = usb_alloc_urb(0, GFP_KERNEL);
437 if (!urb) {
438 err("No free urbs available");
439 goto no_rx_urb;
440 }
441 buf_size = port->read_urb->transfer_buffer_length;
442 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
443 if (!urb->transfer_buffer) {
444 err("Couldn't allocate urb buffer");
445 goto no_rx_buf;
446 }
447 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
448 if (!wrap) {
449 err("Couldn't allocate urb wrapper");
450 goto no_rx_wrap;
451 }
452 usb_fill_bulk_urb(urb, serial->dev,
453 usb_rcvbulkpipe(serial->dev,
454 port->bulk_in_endpointAddress),
455 urb->transfer_buffer, buf_size,
456 whiteheat_read_callback, port);
457 wrap->urb = urb;
458 list_add(&wrap->list, &info->rx_urbs_free);
459
460 urb = usb_alloc_urb(0, GFP_KERNEL);
461 if (!urb) {
462 err("No free urbs available");
463 goto no_tx_urb;
464 }
465 buf_size = port->write_urb->transfer_buffer_length;
466 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
467 if (!urb->transfer_buffer) {
468 err("Couldn't allocate urb buffer");
469 goto no_tx_buf;
470 }
471 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
472 if (!wrap) {
473 err("Couldn't allocate urb wrapper");
474 goto no_tx_wrap;
475 }
476 usb_fill_bulk_urb(urb, serial->dev,
477 usb_sndbulkpipe(serial->dev,
478 port->bulk_out_endpointAddress),
479 urb->transfer_buffer, buf_size,
480 whiteheat_write_callback, port);
481 wrap->urb = urb;
482 list_add(&wrap->list, &info->tx_urbs_free);
483 }
484
485 usb_set_serial_port_data(port, info);
486 }
487
488 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
489 if (command_info == NULL) {
490 err("%s: Out of memory for port structures\n", serial->type->description);
491 goto no_command_private;
492 }
493
494 spin_lock_init(&command_info->lock);
495 command_info->port_running = 0;
496 init_waitqueue_head(&command_info->wait_command);
497 usb_set_serial_port_data(command_port, command_info);
498 command_port->write_urb->complete = command_port_write_callback;
499 command_port->read_urb->complete = command_port_read_callback;
500 kfree(result);
501 kfree(command);
502
503 return 0;
504
505 no_firmware:
506 /* Firmware likely not running */
507 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
508 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
509 err("%s: please contact support@connecttech.com\n", serial->type->description);
510 kfree(result);
511 return -ENODEV;
512
513 no_command_private:
514 for (i = serial->num_ports - 1; i >= 0; i--) {
515 port = serial->port[i];
516 info = usb_get_serial_port_data(port);
517 for (j = urb_pool_size - 1; j >= 0; j--) {
518 tmp = list_first(&info->tx_urbs_free);
519 list_del(tmp);
520 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
521 urb = wrap->urb;
522 kfree(wrap);
523 no_tx_wrap:
524 kfree(urb->transfer_buffer);
525 no_tx_buf:
526 usb_free_urb(urb);
527 no_tx_urb:
528 tmp = list_first(&info->rx_urbs_free);
529 list_del(tmp);
530 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
531 urb = wrap->urb;
532 kfree(wrap);
533 no_rx_wrap:
534 kfree(urb->transfer_buffer);
535 no_rx_buf:
536 usb_free_urb(urb);
537 no_rx_urb:
538 ;
539 }
540 kfree(info);
541 no_private:
542 ;
543 }
544 kfree(result);
545 no_result_buffer:
546 kfree(command);
547 no_command_buffer:
548 return -ENOMEM;
549 }
550
551
552 static void whiteheat_shutdown (struct usb_serial *serial)
553 {
554 struct usb_serial_port *command_port;
555 struct usb_serial_port *port;
556 struct whiteheat_private *info;
557 struct whiteheat_urb_wrap *wrap;
558 struct urb *urb;
559 struct list_head *tmp;
560 struct list_head *tmp2;
561 int i;
562
563 dbg("%s", __FUNCTION__);
564
565 /* free up our private data for our command port */
566 command_port = serial->port[COMMAND_PORT];
567 kfree (usb_get_serial_port_data(command_port));
568
569 for (i = 0; i < serial->num_ports; i++) {
570 port = serial->port[i];
571 info = usb_get_serial_port_data(port);
572 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
573 list_del(tmp);
574 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
575 urb = wrap->urb;
576 kfree(wrap);
577 kfree(urb->transfer_buffer);
578 usb_free_urb(urb);
579 }
580 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
581 list_del(tmp);
582 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
583 urb = wrap->urb;
584 kfree(wrap);
585 kfree(urb->transfer_buffer);
586 usb_free_urb(urb);
587 }
588 kfree(info);
589 }
590
591 return;
592 }
593
594
595 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
596 {
597 int retval = 0;
598 struct termios old_term;
599
600 dbg("%s - port %d", __FUNCTION__, port->number);
601
602 retval = start_command_port(port->serial);
603 if (retval)
604 goto exit;
605
606 if (port->tty)
607 port->tty->low_latency = 1;
608
609 /* send an open port command */
610 retval = firm_open(port);
611 if (retval) {
612 stop_command_port(port->serial);
613 goto exit;
614 }
615
616 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
617 if (retval) {
618 firm_close(port);
619 stop_command_port(port->serial);
620 goto exit;
621 }
622
623 old_term.c_cflag = ~port->tty->termios->c_cflag;
624 old_term.c_iflag = ~port->tty->termios->c_iflag;
625 whiteheat_set_termios(port, &old_term);
626
627 /* Work around HCD bugs */
628 usb_clear_halt(port->serial->dev, port->read_urb->pipe);
629 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
630
631 /* Start reading from the device */
632 retval = start_port_read(port);
633 if (retval) {
634 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
635 firm_close(port);
636 stop_command_port(port->serial);
637 goto exit;
638 }
639
640 exit:
641 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
642 return retval;
643 }
644
645
646 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
647 {
648 struct whiteheat_private *info = usb_get_serial_port_data(port);
649 struct whiteheat_urb_wrap *wrap;
650 struct urb *urb;
651 struct list_head *tmp;
652 struct list_head *tmp2;
653 unsigned long flags;
654
655 dbg("%s - port %d", __FUNCTION__, port->number);
656
657 /* filp is NULL when called from usb_serial_disconnect */
658 if (filp && (tty_hung_up_p(filp))) {
659 return;
660 }
661
662 port->tty->closing = 1;
663
664 /*
665 * Not currently in use; tty_wait_until_sent() calls
666 * serial_chars_in_buffer() which deadlocks on the second semaphore
667 * acquisition. This should be fixed at some point. Greg's been
668 * notified.
669 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
670 tty_wait_until_sent(port->tty, CLOSING_DELAY);
671 }
672 */
673
674 if (port->tty->driver->flush_buffer)
675 port->tty->driver->flush_buffer(port->tty);
676 tty_ldisc_flush(port->tty);
677
678 firm_report_tx_done(port);
679
680 firm_close(port);
681
682 /* shutdown our bulk reads and writes */
683 spin_lock_irqsave(&info->lock, flags);
684 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
685 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
686 urb = wrap->urb;
687 usb_kill_urb(urb);
688 list_move(tmp, &info->rx_urbs_free);
689 }
690 list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
691 list_move(tmp, &info->rx_urbs_free);
692
693 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
694 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
695 urb = wrap->urb;
696 usb_kill_urb(urb);
697 list_move(tmp, &info->tx_urbs_free);
698 }
699 spin_unlock_irqrestore(&info->lock, flags);
700
701 stop_command_port(port->serial);
702
703 port->tty->closing = 0;
704 }
705
706
707 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
708 {
709 struct usb_serial *serial = port->serial;
710 struct whiteheat_private *info = usb_get_serial_port_data(port);
711 struct whiteheat_urb_wrap *wrap;
712 struct urb *urb;
713 int result;
714 int bytes;
715 int sent = 0;
716 unsigned long flags;
717 struct list_head *tmp;
718
719 dbg("%s - port %d", __FUNCTION__, port->number);
720
721 if (count == 0) {
722 dbg("%s - write request of 0 bytes", __FUNCTION__);
723 return (0);
724 }
725
726 while (count) {
727 spin_lock_irqsave(&info->lock, flags);
728 if (list_empty(&info->tx_urbs_free)) {
729 spin_unlock_irqrestore(&info->lock, flags);
730 break;
731 }
732 tmp = list_first(&info->tx_urbs_free);
733 list_del(tmp);
734 spin_unlock_irqrestore(&info->lock, flags);
735
736 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
737 urb = wrap->urb;
738 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
739 memcpy (urb->transfer_buffer, buf + sent, bytes);
740
741 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
742
743 urb->dev = serial->dev;
744 urb->transfer_buffer_length = bytes;
745 result = usb_submit_urb(urb, GFP_ATOMIC);
746 if (result) {
747 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
748 sent = result;
749 spin_lock_irqsave(&info->lock, flags);
750 list_add(tmp, &info->tx_urbs_free);
751 spin_unlock_irqrestore(&info->lock, flags);
752 break;
753 } else {
754 sent += bytes;
755 count -= bytes;
756 spin_lock_irqsave(&info->lock, flags);
757 list_add(tmp, &info->tx_urbs_submitted);
758 spin_unlock_irqrestore(&info->lock, flags);
759 }
760 }
761
762 return sent;
763 }
764
765
766 static int whiteheat_write_room(struct usb_serial_port *port)
767 {
768 struct whiteheat_private *info = usb_get_serial_port_data(port);
769 struct list_head *tmp;
770 int room = 0;
771 unsigned long flags;
772
773 dbg("%s - port %d", __FUNCTION__, port->number);
774
775 spin_lock_irqsave(&info->lock, flags);
776 list_for_each(tmp, &info->tx_urbs_free)
777 room++;
778 spin_unlock_irqrestore(&info->lock, flags);
779 room *= port->bulk_out_size;
780
781 dbg("%s - returns %d", __FUNCTION__, room);
782 return (room);
783 }
784
785
786 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
787 {
788 struct whiteheat_private *info = usb_get_serial_port_data(port);
789 unsigned int modem_signals = 0;
790
791 dbg("%s - port %d", __FUNCTION__, port->number);
792
793 firm_get_dtr_rts(port);
794 if (info->mcr & UART_MCR_DTR)
795 modem_signals |= TIOCM_DTR;
796 if (info->mcr & UART_MCR_RTS)
797 modem_signals |= TIOCM_RTS;
798
799 return modem_signals;
800 }
801
802
803 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
804 unsigned int set, unsigned int clear)
805 {
806 struct whiteheat_private *info = usb_get_serial_port_data(port);
807
808 dbg("%s - port %d", __FUNCTION__, port->number);
809
810 if (set & TIOCM_RTS)
811 info->mcr |= UART_MCR_RTS;
812 if (set & TIOCM_DTR)
813 info->mcr |= UART_MCR_DTR;
814
815 if (clear & TIOCM_RTS)
816 info->mcr &= ~UART_MCR_RTS;
817 if (clear & TIOCM_DTR)
818 info->mcr &= ~UART_MCR_DTR;
819
820 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
821 firm_set_rts(port, info->mcr & UART_MCR_RTS);
822 return 0;
823 }
824
825
826 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
827 {
828 struct serial_struct serstruct;
829 void __user *user_arg = (void __user *)arg;
830
831 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
832
833 switch (cmd) {
834 case TIOCGSERIAL:
835 memset(&serstruct, 0, sizeof(serstruct));
836 serstruct.type = PORT_16654;
837 serstruct.line = port->serial->minor;
838 serstruct.port = port->number;
839 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
840 serstruct.xmit_fifo_size = port->bulk_out_size;
841 serstruct.custom_divisor = 0;
842 serstruct.baud_base = 460800;
843 serstruct.close_delay = CLOSING_DELAY;
844 serstruct.closing_wait = CLOSING_DELAY;
845
846 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
847 return -EFAULT;
848
849 break;
850
851 case TIOCSSERIAL:
852 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
853 return -EFAULT;
854
855 /*
856 * For now this is ignored. dip sets the ASYNC_[V]HI flags
857 * but this isn't used by us at all. Maybe someone somewhere
858 * will need the custom_divisor setting.
859 */
860
861 break;
862
863 default:
864 break;
865 }
866
867 return -ENOIOCTLCMD;
868 }
869
870
871 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
872 {
873 dbg("%s -port %d", __FUNCTION__, port->number);
874
875 if ((!port->tty) || (!port->tty->termios)) {
876 dbg("%s - no tty structures", __FUNCTION__);
877 goto exit;
878 }
879
880 /* check that they really want us to change something */
881 if (old_termios) {
882 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
883 (port->tty->termios->c_iflag == old_termios->c_iflag)) {
884 dbg("%s - nothing to change...", __FUNCTION__);
885 goto exit;
886 }
887 }
888
889 firm_setup_port(port);
890
891 exit:
892 return;
893 }
894
895
896 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
897 firm_set_break(port, break_state);
898 }
899
900
901 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
902 {
903 struct whiteheat_private *info = usb_get_serial_port_data(port);
904 struct list_head *tmp;
905 struct whiteheat_urb_wrap *wrap;
906 int chars = 0;
907 unsigned long flags;
908
909 dbg("%s - port %d", __FUNCTION__, port->number);
910
911 spin_lock_irqsave(&info->lock, flags);
912 list_for_each(tmp, &info->tx_urbs_submitted) {
913 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
914 chars += wrap->urb->transfer_buffer_length;
915 }
916 spin_unlock_irqrestore(&info->lock, flags);
917
918 dbg ("%s - returns %d", __FUNCTION__, chars);
919 return (chars);
920 }
921
922
923 static void whiteheat_throttle (struct usb_serial_port *port)
924 {
925 struct whiteheat_private *info = usb_get_serial_port_data(port);
926 unsigned long flags;
927
928 dbg("%s - port %d", __FUNCTION__, port->number);
929
930 spin_lock_irqsave(&info->lock, flags);
931 info->flags |= THROTTLED;
932 spin_unlock_irqrestore(&info->lock, flags);
933
934 return;
935 }
936
937
938 static void whiteheat_unthrottle (struct usb_serial_port *port)
939 {
940 struct whiteheat_private *info = usb_get_serial_port_data(port);
941 int actually_throttled;
942 unsigned long flags;
943
944 dbg("%s - port %d", __FUNCTION__, port->number);
945
946 spin_lock_irqsave(&info->lock, flags);
947 actually_throttled = info->flags & ACTUALLY_THROTTLED;
948 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
949 spin_unlock_irqrestore(&info->lock, flags);
950
951 if (actually_throttled)
952 rx_data_softint(port);
953
954 return;
955 }
956
957
958 /*****************************************************************************
959 * Connect Tech's White Heat callback routines
960 *****************************************************************************/
961 static void command_port_write_callback (struct urb *urb, struct pt_regs *regs)
962 {
963 dbg("%s", __FUNCTION__);
964
965 if (urb->status) {
966 dbg ("nonzero urb status: %d", urb->status);
967 return;
968 }
969 }
970
971
972 static void command_port_read_callback (struct urb *urb, struct pt_regs *regs)
973 {
974 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
975 struct whiteheat_command_private *command_info;
976 unsigned char *data = urb->transfer_buffer;
977 int result;
978 unsigned long flags;
979
980 dbg("%s", __FUNCTION__);
981
982 if (urb->status) {
983 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
984 return;
985 }
986
987 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
988
989 command_info = usb_get_serial_port_data(command_port);
990 if (!command_info) {
991 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
992 return;
993 }
994 spin_lock_irqsave(&command_info->lock, flags);
995
996 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
997 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
998 wake_up_interruptible(&command_info->wait_command);
999 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1000 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1001 wake_up_interruptible(&command_info->wait_command);
1002 } else if (data[0] == WHITEHEAT_EVENT) {
1003 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1004 dbg("%s - event received", __FUNCTION__);
1005 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1006 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1007 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1008 wake_up_interruptible(&command_info->wait_command);
1009 } else {
1010 dbg("%s - bad reply from firmware", __FUNCTION__);
1011 }
1012
1013 /* Continue trying to always read */
1014 command_port->read_urb->dev = command_port->serial->dev;
1015 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1016 spin_unlock_irqrestore(&command_info->lock, flags);
1017 if (result)
1018 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1019 }
1020
1021
1022 static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs)
1023 {
1024 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1025 struct whiteheat_urb_wrap *wrap;
1026 unsigned char *data = urb->transfer_buffer;
1027 struct whiteheat_private *info = usb_get_serial_port_data(port);
1028
1029 dbg("%s - port %d", __FUNCTION__, port->number);
1030
1031 spin_lock(&info->lock);
1032 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1033 if (!wrap) {
1034 spin_unlock(&info->lock);
1035 err("%s - Not my urb!", __FUNCTION__);
1036 return;
1037 }
1038 list_del(&wrap->list);
1039 spin_unlock(&info->lock);
1040
1041 if (urb->status) {
1042 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->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, struct pt_regs *regs)
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
1070 dbg("%s - port %d", __FUNCTION__, port->number);
1071
1072 spin_lock(&info->lock);
1073 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1074 if (!wrap) {
1075 spin_unlock(&info->lock);
1076 err("%s - Not my urb!", __FUNCTION__);
1077 return;
1078 }
1079 list_move(&wrap->list, &info->tx_urbs_free);
1080 spin_unlock(&info->lock);
1081
1082 if (urb->status) {
1083 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1084 return;
1085 }
1086
1087 usb_serial_port_softint(port);
1088 }
1089
1090
1091 /*****************************************************************************
1092 * Connect Tech's White Heat firmware interface
1093 *****************************************************************************/
1094 static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1095 {
1096 struct usb_serial_port *command_port;
1097 struct whiteheat_command_private *command_info;
1098 struct whiteheat_private *info;
1099 __u8 *transfer_buffer;
1100 int retval = 0;
1101 unsigned long flags;
1102
1103 dbg("%s - command %d", __FUNCTION__, command);
1104
1105 command_port = port->serial->port[COMMAND_PORT];
1106 command_info = usb_get_serial_port_data(command_port);
1107 spin_lock_irqsave(&command_info->lock, flags);
1108 command_info->command_finished = FALSE;
1109
1110 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1111 transfer_buffer[0] = command;
1112 memcpy (&transfer_buffer[1], data, datasize);
1113 command_port->write_urb->transfer_buffer_length = datasize + 1;
1114 command_port->write_urb->dev = port->serial->dev;
1115 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
1116 if (retval) {
1117 dbg("%s - submit urb failed", __FUNCTION__);
1118 goto exit;
1119 }
1120 spin_unlock_irqrestore(&command_info->lock, flags);
1121
1122 /* wait for the command to complete */
1123 wait_event_interruptible_timeout(command_info->wait_command,
1124 (command_info->command_finished != FALSE), COMMAND_TIMEOUT);
1125
1126 spin_lock_irqsave(&command_info->lock, flags);
1127
1128 if (command_info->command_finished == FALSE) {
1129 dbg("%s - command timed out.", __FUNCTION__);
1130 retval = -ETIMEDOUT;
1131 goto exit;
1132 }
1133
1134 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1135 dbg("%s - command failed.", __FUNCTION__);
1136 retval = -EIO;
1137 goto exit;
1138 }
1139
1140 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1141 dbg("%s - command completed.", __FUNCTION__);
1142 switch (command) {
1143 case WHITEHEAT_GET_DTR_RTS:
1144 info = usb_get_serial_port_data(port);
1145 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1146 break;
1147 }
1148 }
1149
1150 exit:
1151 spin_unlock_irqrestore(&command_info->lock, flags);
1152 return retval;
1153 }
1154
1155
1156 static int firm_open(struct usb_serial_port *port) {
1157 struct whiteheat_simple open_command;
1158
1159 open_command.port = port->number - port->serial->minor + 1;
1160 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1161 }
1162
1163
1164 static int firm_close(struct usb_serial_port *port) {
1165 struct whiteheat_simple close_command;
1166
1167 close_command.port = port->number - port->serial->minor + 1;
1168 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1169 }
1170
1171
1172 static int firm_setup_port(struct usb_serial_port *port) {
1173 struct whiteheat_port_settings port_settings;
1174 unsigned int cflag = port->tty->termios->c_cflag;
1175
1176 port_settings.port = port->number + 1;
1177
1178 /* get the byte size */
1179 switch (cflag & CSIZE) {
1180 case CS5: port_settings.bits = 5; break;
1181 case CS6: port_settings.bits = 6; break;
1182 case CS7: port_settings.bits = 7; break;
1183 default:
1184 case CS8: port_settings.bits = 8; break;
1185 }
1186 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1187
1188 /* determine the parity */
1189 if (cflag & PARENB)
1190 if (cflag & CMSPAR)
1191 if (cflag & PARODD)
1192 port_settings.parity = WHITEHEAT_PAR_MARK;
1193 else
1194 port_settings.parity = WHITEHEAT_PAR_SPACE;
1195 else
1196 if (cflag & PARODD)
1197 port_settings.parity = WHITEHEAT_PAR_ODD;
1198 else
1199 port_settings.parity = WHITEHEAT_PAR_EVEN;
1200 else
1201 port_settings.parity = WHITEHEAT_PAR_NONE;
1202 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1203
1204 /* figure out the stop bits requested */
1205 if (cflag & CSTOPB)
1206 port_settings.stop = 2;
1207 else
1208 port_settings.stop = 1;
1209 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1210
1211 /* figure out the flow control settings */
1212 if (cflag & CRTSCTS)
1213 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1214 else
1215 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1216 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1217 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1218 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1219 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1220 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1221
1222 /* determine software flow control */
1223 if (I_IXOFF(port->tty))
1224 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1225 else
1226 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1227 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1228
1229 port_settings.xon = START_CHAR(port->tty);
1230 port_settings.xoff = STOP_CHAR(port->tty);
1231 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1232
1233 /* get the baud rate wanted */
1234 port_settings.baud = tty_get_baud_rate(port->tty);
1235 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1236
1237 /* handle any settings that aren't specified in the tty structure */
1238 port_settings.lloop = 0;
1239
1240 /* now send the message to the device */
1241 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1242 }
1243
1244
1245 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1246 struct whiteheat_set_rdb rts_command;
1247
1248 rts_command.port = port->number - port->serial->minor + 1;
1249 rts_command.state = onoff;
1250 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1251 }
1252
1253
1254 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1255 struct whiteheat_set_rdb dtr_command;
1256
1257 dtr_command.port = port->number - port->serial->minor + 1;
1258 dtr_command.state = onoff;
1259 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1260 }
1261
1262
1263 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1264 struct whiteheat_set_rdb break_command;
1265
1266 break_command.port = port->number - port->serial->minor + 1;
1267 break_command.state = onoff;
1268 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1269 }
1270
1271
1272 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1273 struct whiteheat_purge purge_command;
1274
1275 purge_command.port = port->number - port->serial->minor + 1;
1276 purge_command.what = rxtx;
1277 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1278 }
1279
1280
1281 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1282 struct whiteheat_simple get_dr_command;
1283
1284 get_dr_command.port = port->number - port->serial->minor + 1;
1285 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1286 }
1287
1288
1289 static int firm_report_tx_done(struct usb_serial_port *port) {
1290 struct whiteheat_simple close_command;
1291
1292 close_command.port = port->number - port->serial->minor + 1;
1293 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1294 }
1295
1296
1297 /*****************************************************************************
1298 * Connect Tech's White Heat utility functions
1299 *****************************************************************************/
1300 static int start_command_port(struct usb_serial *serial)
1301 {
1302 struct usb_serial_port *command_port;
1303 struct whiteheat_command_private *command_info;
1304 unsigned long flags;
1305 int retval = 0;
1306
1307 command_port = serial->port[COMMAND_PORT];
1308 command_info = usb_get_serial_port_data(command_port);
1309 spin_lock_irqsave(&command_info->lock, flags);
1310 if (!command_info->port_running) {
1311 /* Work around HCD bugs */
1312 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1313
1314 command_port->read_urb->dev = serial->dev;
1315 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1316 if (retval) {
1317 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1318 goto exit;
1319 }
1320 }
1321 command_info->port_running++;
1322
1323 exit:
1324 spin_unlock_irqrestore(&command_info->lock, flags);
1325 return retval;
1326 }
1327
1328
1329 static void stop_command_port(struct usb_serial *serial)
1330 {
1331 struct usb_serial_port *command_port;
1332 struct whiteheat_command_private *command_info;
1333 unsigned long flags;
1334
1335 command_port = serial->port[COMMAND_PORT];
1336 command_info = usb_get_serial_port_data(command_port);
1337 spin_lock_irqsave(&command_info->lock, flags);
1338 command_info->port_running--;
1339 if (!command_info->port_running)
1340 usb_kill_urb(command_port->read_urb);
1341 spin_unlock_irqrestore(&command_info->lock, flags);
1342 }
1343
1344
1345 static int start_port_read(struct usb_serial_port *port)
1346 {
1347 struct whiteheat_private *info = usb_get_serial_port_data(port);
1348 struct whiteheat_urb_wrap *wrap;
1349 struct urb *urb;
1350 int retval = 0;
1351 unsigned long flags;
1352 struct list_head *tmp;
1353 struct list_head *tmp2;
1354
1355 spin_lock_irqsave(&info->lock, flags);
1356
1357 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1358 list_del(tmp);
1359 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1360 urb = wrap->urb;
1361 urb->dev = port->serial->dev;
1362 retval = usb_submit_urb(urb, GFP_KERNEL);
1363 if (retval) {
1364 list_add(tmp, &info->rx_urbs_free);
1365 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1366 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1367 urb = wrap->urb;
1368 usb_kill_urb(urb);
1369 list_move(tmp, &info->rx_urbs_free);
1370 }
1371 break;
1372 }
1373 list_add(tmp, &info->rx_urbs_submitted);
1374 }
1375
1376 spin_unlock_irqrestore(&info->lock, flags);
1377
1378 return retval;
1379 }
1380
1381
1382 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1383 {
1384 struct whiteheat_urb_wrap *wrap;
1385 struct list_head *tmp;
1386
1387 list_for_each(tmp, head) {
1388 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1389 if (wrap->urb == urb)
1390 return wrap;
1391 }
1392
1393 return NULL;
1394 }
1395
1396
1397 static struct list_head *list_first(struct list_head *head)
1398 {
1399 return head->next;
1400 }
1401
1402
1403 static void rx_data_softint(void *private)
1404 {
1405 struct usb_serial_port *port = (struct usb_serial_port *)private;
1406 struct whiteheat_private *info = usb_get_serial_port_data(port);
1407 struct tty_struct *tty = port->tty;
1408 struct whiteheat_urb_wrap *wrap;
1409 struct urb *urb;
1410 unsigned long flags;
1411 struct list_head *tmp;
1412 struct list_head *tmp2;
1413 int result;
1414 int sent = 0;
1415
1416 spin_lock_irqsave(&info->lock, flags);
1417 if (info->flags & THROTTLED) {
1418 spin_unlock_irqrestore(&info->lock, flags);
1419 return;
1420 }
1421
1422 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1423 list_del(tmp);
1424 spin_unlock_irqrestore(&info->lock, flags);
1425
1426 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1427 urb = wrap->urb;
1428
1429 if (tty && urb->actual_length) {
1430 int len = tty_buffer_request_room(tty, urb->actual_length);
1431 /* This stuff can go away now I suspect */
1432 if (unlikely(len < urb->actual_length)) {
1433 spin_lock_irqsave(&info->lock, flags);
1434 list_add(tmp, &info->rx_urb_q);
1435 spin_unlock_irqrestore(&info->lock, flags);
1436 tty_flip_buffer_push(tty);
1437 schedule_work(&info->rx_work);
1438 return;
1439 }
1440 tty_insert_flip_string(tty, urb->transfer_buffer, len);
1441 sent += len;
1442 }
1443
1444 urb->dev = port->serial->dev;
1445 result = usb_submit_urb(urb, GFP_ATOMIC);
1446 if (result) {
1447 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1448 spin_lock_irqsave(&info->lock, flags);
1449 list_add(tmp, &info->rx_urbs_free);
1450 continue;
1451 }
1452
1453 spin_lock_irqsave(&info->lock, flags);
1454 list_add(tmp, &info->rx_urbs_submitted);
1455 }
1456 spin_unlock_irqrestore(&info->lock, flags);
1457
1458 if (sent)
1459 tty_flip_buffer_push(tty);
1460 }
1461
1462
1463 /*****************************************************************************
1464 * Connect Tech's White Heat module functions
1465 *****************************************************************************/
1466 static int __init whiteheat_init (void)
1467 {
1468 int retval;
1469 retval = usb_serial_register(&whiteheat_fake_device);
1470 if (retval)
1471 goto failed_fake_register;
1472 retval = usb_serial_register(&whiteheat_device);
1473 if (retval)
1474 goto failed_device_register;
1475 retval = usb_register(&whiteheat_driver);
1476 if (retval)
1477 goto failed_usb_register;
1478 info(DRIVER_DESC " " DRIVER_VERSION);
1479 return 0;
1480 failed_usb_register:
1481 usb_serial_deregister(&whiteheat_device);
1482 failed_device_register:
1483 usb_serial_deregister(&whiteheat_fake_device);
1484 failed_fake_register:
1485 return retval;
1486 }
1487
1488
1489 static void __exit whiteheat_exit (void)
1490 {
1491 usb_deregister (&whiteheat_driver);
1492 usb_serial_deregister (&whiteheat_fake_device);
1493 usb_serial_deregister (&whiteheat_device);
1494 }
1495
1496
1497 module_init(whiteheat_init);
1498 module_exit(whiteheat_exit);
1499
1500 MODULE_AUTHOR( DRIVER_AUTHOR );
1501 MODULE_DESCRIPTION( DRIVER_DESC );
1502 MODULE_LICENSE("GPL");
1503
1504 module_param(urb_pool_size, int, 0);
1505 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1506
1507 module_param(debug, bool, S_IRUGO | S_IWUSR);
1508 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree