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[PATCH] USB Serial: move old changelog comments out of source code
[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
68#include <linux/config.h>
69#include <linux/kernel.h>
70#include <linux/errno.h>
71#include <linux/init.h>
72#include <linux/slab.h>
73#include <linux/tty.h>
74#include <linux/tty_driver.h>
75#include <linux/tty_flip.h>
76#include <linux/module.h>
77#include <linux/spinlock.h>
78#include <asm/uaccess.h>
79#include <asm/termbits.h>
80#include <linux/usb.h>
81#include <linux/serial_reg.h>
82#include <linux/serial.h>
83#include "usb-serial.h"
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 = {
130 .owner = THIS_MODULE,
131 .name = "whiteheat",
132 .probe = usb_serial_probe,
133 .disconnect = usb_serial_disconnect,
134 .id_table = id_table_combined,
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);
149static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old);
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);
156static void whiteheat_read_callback (struct urb *urb, struct pt_regs *regs);
157static void whiteheat_write_callback (struct urb *urb, struct pt_regs *regs);
158
ea65370d 159static struct usb_serial_driver whiteheat_fake_device = {
18fcac35
GKH		 160 .driver = {
161 .owner = THIS_MODULE,
162 },
1da177e4
LT		 163 .name = "Connect Tech - WhiteHEAT - (prerenumeration)",
164 .short_name = "whiteheatnofirm",
165 .id_table = id_table_prerenumeration,
166 .num_interrupt_in = NUM_DONT_CARE,
167 .num_bulk_in = NUM_DONT_CARE,
168 .num_bulk_out = NUM_DONT_CARE,
169 .num_ports = 1,
170 .probe = whiteheat_firmware_download,
171 .attach = whiteheat_firmware_attach,
172};
173
ea65370d 174static struct usb_serial_driver whiteheat_device = {
18fcac35
GKH		 175 .driver = {
176 .owner = THIS_MODULE,
177 },
1da177e4
LT		 178 .name = "Connect Tech - WhiteHEAT",
179 .short_name = "whiteheat",
180 .id_table = id_table_std,
181 .num_interrupt_in = NUM_DONT_CARE,
182 .num_bulk_in = NUM_DONT_CARE,
183 .num_bulk_out = NUM_DONT_CARE,
184 .num_ports = 4,
185 .attach = whiteheat_attach,
186 .shutdown = whiteheat_shutdown,
187 .open = whiteheat_open,
188 .close = whiteheat_close,
189 .write = whiteheat_write,
190 .write_room = whiteheat_write_room,
191 .ioctl = whiteheat_ioctl,
192 .set_termios = whiteheat_set_termios,
193 .break_ctl = whiteheat_break_ctl,
194 .tiocmget = whiteheat_tiocmget,
195 .tiocmset = whiteheat_tiocmset,
196 .chars_in_buffer = whiteheat_chars_in_buffer,
197 .throttle = whiteheat_throttle,
198 .unthrottle = whiteheat_unthrottle,
199 .read_bulk_callback = whiteheat_read_callback,
200 .write_bulk_callback = whiteheat_write_callback,
201};
202
203
204struct whiteheat_command_private {
205 spinlock_t lock;
206 __u8 port_running;
207 __u8 command_finished;
208 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
209 __u8 result_buffer[64];
210};
211
212
213#define THROTTLED 0x01
214#define ACTUALLY_THROTTLED 0x02
215
216static int urb_pool_size = 8;
217
218struct whiteheat_urb_wrap {
219 struct list_head list;
220 struct urb *urb;
221};
222
223struct whiteheat_private {
224 spinlock_t lock;
225 __u8 flags;
226 __u8 mcr;
227 struct list_head rx_urbs_free;
228 struct list_head rx_urbs_submitted;
229 struct list_head rx_urb_q;
230 struct work_struct rx_work;
231 struct list_head tx_urbs_free;
232 struct list_head tx_urbs_submitted;
233};
234
235
236/* local function prototypes */
237static int start_command_port(struct usb_serial *serial);
238static void stop_command_port(struct usb_serial *serial);
239static void command_port_write_callback(struct urb *urb, struct pt_regs *regs);
240static void command_port_read_callback(struct urb *urb, struct pt_regs *regs);
241
242static int start_port_read(struct usb_serial_port *port);
243static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
244static struct list_head *list_first(struct list_head *head);
245static void rx_data_softint(void *private);
246
247static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
248static int firm_open(struct usb_serial_port *port);
249static int firm_close(struct usb_serial_port *port);
250static int firm_setup_port(struct usb_serial_port *port);
251static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
252static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
253static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
254static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
255static int firm_get_dtr_rts(struct usb_serial_port *port);
256static int firm_report_tx_done(struct usb_serial_port *port);
257
258
259#define COMMAND_PORT 4
260#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
261#define COMMAND_TIMEOUT_MS 2000
262#define CLOSING_DELAY (30 * HZ)
263
264
265/*****************************************************************************
266 * Connect Tech's White Heat prerenumeration driver functions
267 *****************************************************************************/
268
269/* steps to download the firmware to the WhiteHEAT device:
270 - hold the reset (by writing to the reset bit of the CPUCS register)
271 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
272 - release the reset (by writing to the CPUCS register)
273 - download the WH.HEX file for all addresses greater than 0x1b3f using
274 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
275 - hold the reset
276 - download the WH.HEX file for all addresses less than 0x1b40 using
277 VENDOR_REQUEST_ANCHOR_LOAD
278 - release the reset
279 - device renumerated itself and comes up as new device id with all
280 firmware download completed.
281*/
282static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
283{
284 int response;
285 const struct whiteheat_hex_record *record;
286
287 dbg("%s", __FUNCTION__);
288
289 response = ezusb_set_reset (serial, 1);
290
291 record = &whiteheat_loader[0];
292 while (record->address != 0xffff) {
293 response = ezusb_writememory (serial, record->address,
294 (unsigned char *)record->data, record->data_size, 0xa0);
295 if (response < 0) {
296 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
297 __FUNCTION__, response, record->address, record->data, record->data_size);
298 break;
299 }
300 ++record;
301 }
302
303 response = ezusb_set_reset (serial, 0);
304
305 record = &whiteheat_firmware[0];
306 while (record->address < 0x1b40) {
307 ++record;
308 }
309 while (record->address != 0xffff) {
310 response = ezusb_writememory (serial, record->address,
311 (unsigned char *)record->data, record->data_size, 0xa3);
312 if (response < 0) {
313 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
314 __FUNCTION__, response, record->address, record->data, record->data_size);
315 break;
316 }
317 ++record;
318 }
319
320 response = ezusb_set_reset (serial, 1);
321
322 record = &whiteheat_firmware[0];
323 while (record->address < 0x1b40) {
324 response = ezusb_writememory (serial, record->address,
325 (unsigned char *)record->data, record->data_size, 0xa0);
326 if (response < 0) {
327 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
328 __FUNCTION__, response, record->address, record->data, record->data_size);
329 break;
330 }
331 ++record;
332 }
333
334 response = ezusb_set_reset (serial, 0);
335
336 return 0;
337}
338
339
340static int whiteheat_firmware_attach (struct usb_serial *serial)
341{
342 /* We want this device to fail to have a driver assigned to it */
343 return 1;
344}
345
346
347/*****************************************************************************
348 * Connect Tech's White Heat serial driver functions
349 *****************************************************************************/
350static int whiteheat_attach (struct usb_serial *serial)
351{
352 struct usb_serial_port *command_port;
353 struct whiteheat_command_private *command_info;
354 struct usb_serial_port *port;
355 struct whiteheat_private *info;
356 struct whiteheat_hw_info *hw_info;
357 int pipe;
358 int ret;
359 int alen;
360 __u8 *command;
361 __u8 *result;
362 int i;
363 int j;
364 struct urb *urb;
365 int buf_size;
366 struct whiteheat_urb_wrap *wrap;
367 struct list_head *tmp;
368
369 command_port = serial->port[COMMAND_PORT];
370
371 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
372 command = kmalloc(2, GFP_KERNEL);
373 if (!command)
374 goto no_command_buffer;
375 command[0] = WHITEHEAT_GET_HW_INFO;
376 command[1] = 0;
377
378 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
379 if (!result)
380 goto no_result_buffer;
381 /*
382 * When the module is reloaded the firmware is still there and
383 * the endpoints are still in the usb core unchanged. This is the
384 * unlinking bug in disguise. Same for the call below.
385 */
386 usb_clear_halt(serial->dev, pipe);
387 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
388 if (ret) {
389 err("%s: Couldn't send command [%d]", serial->type->name, ret);
390 goto no_firmware;
391 } else if (alen != sizeof(command)) {
392 err("%s: Send command incomplete [%d]", serial->type->name, alen);
393 goto no_firmware;
394 }
395
396 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
397 /* See the comment on the usb_clear_halt() above */
398 usb_clear_halt(serial->dev, pipe);
399 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
400 if (ret) {
401 err("%s: Couldn't get results [%d]", serial->type->name, ret);
402 goto no_firmware;
403 } else if (alen != sizeof(result)) {
404 err("%s: Get results incomplete [%d]", serial->type->name, alen);
405 goto no_firmware;
406 } else if (result[0] != command[0]) {
407 err("%s: Command failed [%d]", serial->type->name, result[0]);
408 goto no_firmware;
409 }
410
411 hw_info = (struct whiteheat_hw_info *)&result[1];
412
413 info("%s: Driver %s: Firmware v%d.%02d", serial->type->name,
414 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
415
416 for (i = 0; i < serial->num_ports; i++) {
417 port = serial->port[i];
418
419 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
420 if (info == NULL) {
421 err("%s: Out of memory for port structures\n", serial->type->name);
422 goto no_private;
423 }
424
425 spin_lock_init(&info->lock);
426 info->flags = 0;
427 info->mcr = 0;
428 INIT_WORK(&info->rx_work, rx_data_softint, port);
429
430 INIT_LIST_HEAD(&info->rx_urbs_free);
431 INIT_LIST_HEAD(&info->rx_urbs_submitted);
432 INIT_LIST_HEAD(&info->rx_urb_q);
433 INIT_LIST_HEAD(&info->tx_urbs_free);
434 INIT_LIST_HEAD(&info->tx_urbs_submitted);
435
436 for (j = 0; j < urb_pool_size; j++) {
437 urb = usb_alloc_urb(0, GFP_KERNEL);
438 if (!urb) {
439 err("No free urbs available");
440 goto no_rx_urb;
441 }
442 buf_size = port->read_urb->transfer_buffer_length;
443 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
444 if (!urb->transfer_buffer) {
445 err("Couldn't allocate urb buffer");
446 goto no_rx_buf;
447 }
448 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
449 if (!wrap) {
450 err("Couldn't allocate urb wrapper");
451 goto no_rx_wrap;
452 }
453 usb_fill_bulk_urb(urb, serial->dev,
454 usb_rcvbulkpipe(serial->dev,
455 port->bulk_in_endpointAddress),
456 urb->transfer_buffer, buf_size,
457 whiteheat_read_callback, port);
458 wrap->urb = urb;
459 list_add(&wrap->list, &info->rx_urbs_free);
460
461 urb = usb_alloc_urb(0, GFP_KERNEL);
462 if (!urb) {
463 err("No free urbs available");
464 goto no_tx_urb;
465 }
466 buf_size = port->write_urb->transfer_buffer_length;
467 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
468 if (!urb->transfer_buffer) {
469 err("Couldn't allocate urb buffer");
470 goto no_tx_buf;
471 }
472 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
473 if (!wrap) {
474 err("Couldn't allocate urb wrapper");
475 goto no_tx_wrap;
476 }
477 usb_fill_bulk_urb(urb, serial->dev,
478 usb_sndbulkpipe(serial->dev,
479 port->bulk_out_endpointAddress),
480 urb->transfer_buffer, buf_size,
481 whiteheat_write_callback, port);
482 wrap->urb = urb;
483 list_add(&wrap->list, &info->tx_urbs_free);
484 }
485
486 usb_set_serial_port_data(port, info);
487 }
488
489 command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
490 if (command_info == NULL) {
491 err("%s: Out of memory for port structures\n", serial->type->name);
492 goto no_command_private;
493 }
494
495 spin_lock_init(&command_info->lock);
496 command_info->port_running = 0;
497 init_waitqueue_head(&command_info->wait_command);
498 usb_set_serial_port_data(command_port, command_info);
499 command_port->write_urb->complete = command_port_write_callback;
500 command_port->read_urb->complete = command_port_read_callback;
501 kfree(result);
502 kfree(command);
503
504 return 0;
505
506no_firmware:
507 /* Firmware likely not running */
508 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->name);
509 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->name);
510 err("%s: please contact support@connecttech.com\n", serial->type->name);
511 return -ENODEV;
512
513no_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);
523no_tx_wrap:
524 kfree(urb->transfer_buffer);
525no_tx_buf:
526 usb_free_urb(urb);
527no_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);
533no_rx_wrap:
534 kfree(urb->transfer_buffer);
535no_rx_buf:
536 usb_free_urb(urb);
537no_rx_urb:
538 ;
539 }
540 kfree(info);
541no_private:
542 ;
543 }
544 kfree(result);
545no_result_buffer:
546 kfree(command);
547no_command_buffer:
548 return -ENOMEM;
549}
550
551
552static 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
595static 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
640exit:
641 dbg("%s - exit, retval = %d", __FUNCTION__, retval);
642 return retval;
643}
644
645
646static 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_del(tmp);
689 list_add(tmp, &info->rx_urbs_free);
690 }
691 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
692 list_del(tmp);
693 list_add(tmp, &info->rx_urbs_free);
694 }
695 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
696 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
697 urb = wrap->urb;
698 usb_kill_urb(urb);
699 list_del(tmp);
700 list_add(tmp, &info->tx_urbs_free);
701 }
702 spin_unlock_irqrestore(&info->lock, flags);
703
704 stop_command_port(port->serial);
705
706 port->tty->closing = 0;
707}
708
709
710static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
711{
712 struct usb_serial *serial = port->serial;
713 struct whiteheat_private *info = usb_get_serial_port_data(port);
714 struct whiteheat_urb_wrap *wrap;
715 struct urb *urb;
716 int result;
717 int bytes;
718 int sent = 0;
719 unsigned long flags;
720 struct list_head *tmp;
721
722 dbg("%s - port %d", __FUNCTION__, port->number);
723
724 if (count == 0) {
725 dbg("%s - write request of 0 bytes", __FUNCTION__);
726 return (0);
727 }
728
729 while (count) {
730 spin_lock_irqsave(&info->lock, flags);
731 if (list_empty(&info->tx_urbs_free)) {
732 spin_unlock_irqrestore(&info->lock, flags);
733 break;
734 }
735 tmp = list_first(&info->tx_urbs_free);
736 list_del(tmp);
737 spin_unlock_irqrestore(&info->lock, flags);
738
739 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
740 urb = wrap->urb;
741 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
742 memcpy (urb->transfer_buffer, buf + sent, bytes);
743
744 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
745
746 urb->dev = serial->dev;
747 urb->transfer_buffer_length = bytes;
748 result = usb_submit_urb(urb, GFP_ATOMIC);
749 if (result) {
750 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
751 sent = result;
752 spin_lock_irqsave(&info->lock, flags);
753 list_add(tmp, &info->tx_urbs_free);
754 spin_unlock_irqrestore(&info->lock, flags);
755 break;
756 } else {
757 sent += bytes;
758 count -= bytes;
759 spin_lock_irqsave(&info->lock, flags);
760 list_add(tmp, &info->tx_urbs_submitted);
761 spin_unlock_irqrestore(&info->lock, flags);
762 }
763 }
764
765 return sent;
766}
767
768
769static int whiteheat_write_room(struct usb_serial_port *port)
770{
771 struct whiteheat_private *info = usb_get_serial_port_data(port);
772 struct list_head *tmp;
773 int room = 0;
774 unsigned long flags;
775
776 dbg("%s - port %d", __FUNCTION__, port->number);
777
778 spin_lock_irqsave(&info->lock, flags);
779 list_for_each(tmp, &info->tx_urbs_free)
780 room++;
781 spin_unlock_irqrestore(&info->lock, flags);
782 room *= port->bulk_out_size;
783
784 dbg("%s - returns %d", __FUNCTION__, room);
785 return (room);
786}
787
788
789static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
790{
791 struct whiteheat_private *info = usb_get_serial_port_data(port);
792 unsigned int modem_signals = 0;
793
794 dbg("%s - port %d", __FUNCTION__, port->number);
795
796 firm_get_dtr_rts(port);
797 if (info->mcr & UART_MCR_DTR)
798 modem_signals |= TIOCM_DTR;
799 if (info->mcr & UART_MCR_RTS)
800 modem_signals |= TIOCM_RTS;
801
802 return modem_signals;
803}
804
805
806static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
807 unsigned int set, unsigned int clear)
808{
809 struct whiteheat_private *info = usb_get_serial_port_data(port);
810
811 dbg("%s - port %d", __FUNCTION__, port->number);
812
813 if (set & TIOCM_RTS)
814 info->mcr |= UART_MCR_RTS;
815 if (set & TIOCM_DTR)
816 info->mcr |= UART_MCR_DTR;
817
818 if (clear & TIOCM_RTS)
819 info->mcr &= ~UART_MCR_RTS;
820 if (clear & TIOCM_DTR)
821 info->mcr &= ~UART_MCR_DTR;
822
823 firm_set_dtr(port, info->mcr & UART_MCR_DTR);
824 firm_set_rts(port, info->mcr & UART_MCR_RTS);
825 return 0;
826}
827
828
829static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
830{
831 struct serial_struct serstruct;
832 void __user *user_arg = (void __user *)arg;
833
834 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
835
836 switch (cmd) {
837 case TIOCGSERIAL:
838 memset(&serstruct, 0, sizeof(serstruct));
839 serstruct.type = PORT_16654;
840 serstruct.line = port->serial->minor;
841 serstruct.port = port->number;
842 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
843 serstruct.xmit_fifo_size = port->bulk_out_size;
844 serstruct.custom_divisor = 0;
845 serstruct.baud_base = 460800;
846 serstruct.close_delay = CLOSING_DELAY;
847 serstruct.closing_wait = CLOSING_DELAY;
848
849 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
850 return -EFAULT;
851
852 break;
853
854 case TIOCSSERIAL:
855 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
856 return -EFAULT;
857
858 /*
859 * For now this is ignored. dip sets the ASYNC_[V]HI flags
860 * but this isn't used by us at all. Maybe someone somewhere
861 * will need the custom_divisor setting.
862 */
863
864 break;
865
866 default:
867 break;
868 }
869
870 return -ENOIOCTLCMD;
871}
872
873
874static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
875{
876 dbg("%s -port %d", __FUNCTION__, port->number);
877
878 if ((!port->tty) || (!port->tty->termios)) {
879 dbg("%s - no tty structures", __FUNCTION__);
880 goto exit;
881 }
882
883 /* check that they really want us to change something */
884 if (old_termios) {
885 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
886 (port->tty->termios->c_iflag == old_termios->c_iflag)) {
887 dbg("%s - nothing to change...", __FUNCTION__);
888 goto exit;
889 }
890 }
891
892 firm_setup_port(port);
893
894exit:
895 return;
896}
897
898
899static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
900 firm_set_break(port, break_state);
901}
902
903
904static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
905{
906 struct whiteheat_private *info = usb_get_serial_port_data(port);
907 struct list_head *tmp;
908 struct whiteheat_urb_wrap *wrap;
909 int chars = 0;
910 unsigned long flags;
911
912 dbg("%s - port %d", __FUNCTION__, port->number);
913
914 spin_lock_irqsave(&info->lock, flags);
915 list_for_each(tmp, &info->tx_urbs_submitted) {
916 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
917 chars += wrap->urb->transfer_buffer_length;
918 }
919 spin_unlock_irqrestore(&info->lock, flags);
920
921 dbg ("%s - returns %d", __FUNCTION__, chars);
922 return (chars);
923}
924
925
926static void whiteheat_throttle (struct usb_serial_port *port)
927{
928 struct whiteheat_private *info = usb_get_serial_port_data(port);
929 unsigned long flags;
930
931 dbg("%s - port %d", __FUNCTION__, port->number);
932
933 spin_lock_irqsave(&info->lock, flags);
934 info->flags |= THROTTLED;
935 spin_unlock_irqrestore(&info->lock, flags);
936
937 return;
938}
939
940
941static void whiteheat_unthrottle (struct usb_serial_port *port)
942{
943 struct whiteheat_private *info = usb_get_serial_port_data(port);
944 int actually_throttled;
945 unsigned long flags;
946
947 dbg("%s - port %d", __FUNCTION__, port->number);
948
949 spin_lock_irqsave(&info->lock, flags);
950 actually_throttled = info->flags & ACTUALLY_THROTTLED;
951 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
952 spin_unlock_irqrestore(&info->lock, flags);
953
954 if (actually_throttled)
955 rx_data_softint(port);
956
957 return;
958}
959
960
961/*****************************************************************************
962 * Connect Tech's White Heat callback routines
963 *****************************************************************************/
964static void command_port_write_callback (struct urb *urb, struct pt_regs *regs)
965{
966 dbg("%s", __FUNCTION__);
967
968 if (urb->status) {
969 dbg ("nonzero urb status: %d", urb->status);
970 return;
971 }
972}
973
974
975static void command_port_read_callback (struct urb *urb, struct pt_regs *regs)
976{
977 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
978 struct whiteheat_command_private *command_info;
979 unsigned char *data = urb->transfer_buffer;
980 int result;
981 unsigned long flags;
982
983 dbg("%s", __FUNCTION__);
984
985 if (urb->status) {
986 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
987 return;
988 }
989
990 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
991
992 command_info = usb_get_serial_port_data(command_port);
993 if (!command_info) {
994 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
995 return;
996 }
997 spin_lock_irqsave(&command_info->lock, flags);
998
999 if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1000 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1001 wake_up_interruptible(&command_info->wait_command);
1002 } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1003 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1004 wake_up_interruptible(&command_info->wait_command);
1005 } else if (data[0] == WHITEHEAT_EVENT) {
1006 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1007 dbg("%s - event received", __FUNCTION__);
1008 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1009 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1010 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1011 wake_up_interruptible(&command_info->wait_command);
1012 } else {
1013 dbg("%s - bad reply from firmware", __FUNCTION__);
1014 }
1015
1016 /* Continue trying to always read */
1017 command_port->read_urb->dev = command_port->serial->dev;
1018 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1019 spin_unlock_irqrestore(&command_info->lock, flags);
1020 if (result)
1021 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1022}
1023
1024
1025static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs)
1026{
1027 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1028 struct whiteheat_urb_wrap *wrap;
1029 unsigned char *data = urb->transfer_buffer;
1030 struct whiteheat_private *info = usb_get_serial_port_data(port);
1031
1032 dbg("%s - port %d", __FUNCTION__, port->number);
1033
1034 spin_lock(&info->lock);
1035 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1036 if (!wrap) {
1037 spin_unlock(&info->lock);
1038 err("%s - Not my urb!", __FUNCTION__);
1039 return;
1040 }
1041 list_del(&wrap->list);
1042 spin_unlock(&info->lock);
1043
1044 if (urb->status) {
1045 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
1046 spin_lock(&info->lock);
1047 list_add(&wrap->list, &info->rx_urbs_free);
1048 spin_unlock(&info->lock);
1049 return;
1050 }
1051
1052 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1053
1054 spin_lock(&info->lock);
1055 list_add_tail(&wrap->list, &info->rx_urb_q);
1056 if (info->flags & THROTTLED) {
1057 info->flags |= ACTUALLY_THROTTLED;
1058 spin_unlock(&info->lock);
1059 return;
1060 }
1061 spin_unlock(&info->lock);
1062
1063 schedule_work(&info->rx_work);
1064}
1065
1066
1067static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs)
1068{
1069 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1070 struct whiteheat_private *info = usb_get_serial_port_data(port);
1071 struct whiteheat_urb_wrap *wrap;
1072
1073 dbg("%s - port %d", __FUNCTION__, port->number);
1074
1075 spin_lock(&info->lock);
1076 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1077 if (!wrap) {
1078 spin_unlock(&info->lock);
1079 err("%s - Not my urb!", __FUNCTION__);
1080 return;
1081 }
1082 list_del(&wrap->list);
1083 list_add(&wrap->list, &info->tx_urbs_free);
1084 spin_unlock(&info->lock);
1085
1086 if (urb->status) {
1087 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1088 return;
1089 }
1090
1091 usb_serial_port_softint((void *)port);
1092
1093 schedule_work(&port->work);
1094}
1095
1096
1097/*****************************************************************************
1098 * Connect Tech's White Heat firmware interface
1099 *****************************************************************************/
1100static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1101{
1102 struct usb_serial_port *command_port;
1103 struct whiteheat_command_private *command_info;
1104 struct whiteheat_private *info;
1105 __u8 *transfer_buffer;
1106 int retval = 0;
1107 unsigned long flags;
1108
1109 dbg("%s - command %d", __FUNCTION__, command);
1110
1111 command_port = port->serial->port[COMMAND_PORT];
1112 command_info = usb_get_serial_port_data(command_port);
1113 spin_lock_irqsave(&command_info->lock, flags);
1114 command_info->command_finished = FALSE;
1115
1116 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1117 transfer_buffer[0] = command;
1118 memcpy (&transfer_buffer[1], data, datasize);
1119 command_port->write_urb->transfer_buffer_length = datasize + 1;
1120 command_port->write_urb->dev = port->serial->dev;
1121 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
1122 if (retval) {
1123 dbg("%s - submit urb failed", __FUNCTION__);
1124 goto exit;
1125 }
1126 spin_unlock_irqrestore(&command_info->lock, flags);
1127
1128 /* wait for the command to complete */
1129 wait_event_interruptible_timeout(command_info->wait_command,
1130 (command_info->command_finished != FALSE), COMMAND_TIMEOUT);
1131
1132 spin_lock_irqsave(&command_info->lock, flags);
1133
1134 if (command_info->command_finished == FALSE) {
1135 dbg("%s - command timed out.", __FUNCTION__);
1136 retval = -ETIMEDOUT;
1137 goto exit;
1138 }
1139
1140 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1141 dbg("%s - command failed.", __FUNCTION__);
1142 retval = -EIO;
1143 goto exit;
1144 }
1145
1146 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1147 dbg("%s - command completed.", __FUNCTION__);
1148 switch (command) {
1149 case WHITEHEAT_GET_DTR_RTS:
1150 info = usb_get_serial_port_data(port);
1151 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1152 break;
1153 }
1154 }
1155
1156exit:
1157 spin_unlock_irqrestore(&command_info->lock, flags);
1158 return retval;
1159}
1160
1161
1162static int firm_open(struct usb_serial_port *port) {
1163 struct whiteheat_simple open_command;
1164
1165 open_command.port = port->number - port->serial->minor + 1;
1166 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1167}
1168
1169
1170static int firm_close(struct usb_serial_port *port) {
1171 struct whiteheat_simple close_command;
1172
1173 close_command.port = port->number - port->serial->minor + 1;
1174 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1175}
1176
1177
1178static int firm_setup_port(struct usb_serial_port *port) {
1179 struct whiteheat_port_settings port_settings;
1180 unsigned int cflag = port->tty->termios->c_cflag;
1181
1182 port_settings.port = port->number + 1;
1183
1184 /* get the byte size */
1185 switch (cflag & CSIZE) {
1186 case CS5: port_settings.bits = 5; break;
1187 case CS6: port_settings.bits = 6; break;
1188 case CS7: port_settings.bits = 7; break;
1189 default:
1190 case CS8: port_settings.bits = 8; break;
1191 }
1192 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1193
1194 /* determine the parity */
1195 if (cflag & PARENB)
1196 if (cflag & CMSPAR)
1197 if (cflag & PARODD)
1198 port_settings.parity = WHITEHEAT_PAR_MARK;
1199 else
1200 port_settings.parity = WHITEHEAT_PAR_SPACE;
1201 else
1202 if (cflag & PARODD)
1203 port_settings.parity = WHITEHEAT_PAR_ODD;
1204 else
1205 port_settings.parity = WHITEHEAT_PAR_EVEN;
1206 else
1207 port_settings.parity = WHITEHEAT_PAR_NONE;
1208 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1209
1210 /* figure out the stop bits requested */
1211 if (cflag & CSTOPB)
1212 port_settings.stop = 2;
1213 else
1214 port_settings.stop = 1;
1215 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1216
1217 /* figure out the flow control settings */
1218 if (cflag & CRTSCTS)
1219 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1220 else
1221 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1222 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1223 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1224 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1225 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1226 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1227
1228 /* determine software flow control */
1229 if (I_IXOFF(port->tty))
1230 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1231 else
1232 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1233 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1234
1235 port_settings.xon = START_CHAR(port->tty);
1236 port_settings.xoff = STOP_CHAR(port->tty);
1237 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1238
1239 /* get the baud rate wanted */
1240 port_settings.baud = tty_get_baud_rate(port->tty);
1241 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1242
1243 /* handle any settings that aren't specified in the tty structure */
1244 port_settings.lloop = 0;
1245
1246 /* now send the message to the device */
1247 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1248}
1249
1250
1251static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1252 struct whiteheat_set_rdb rts_command;
1253
1254 rts_command.port = port->number - port->serial->minor + 1;
1255 rts_command.state = onoff;
1256 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1257}
1258
1259
1260static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1261 struct whiteheat_set_rdb dtr_command;
1262
1263 dtr_command.port = port->number - port->serial->minor + 1;
1264 dtr_command.state = onoff;
1265 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1266}
1267
1268
1269static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1270 struct whiteheat_set_rdb break_command;
1271
1272 break_command.port = port->number - port->serial->minor + 1;
1273 break_command.state = onoff;
1274 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1275}
1276
1277
1278static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1279 struct whiteheat_purge purge_command;
1280
1281 purge_command.port = port->number - port->serial->minor + 1;
1282 purge_command.what = rxtx;
1283 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1284}
1285
1286
1287static int firm_get_dtr_rts(struct usb_serial_port *port) {
1288 struct whiteheat_simple get_dr_command;
1289
1290 get_dr_command.port = port->number - port->serial->minor + 1;
1291 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1292}
1293
1294
1295static int firm_report_tx_done(struct usb_serial_port *port) {
1296 struct whiteheat_simple close_command;
1297
1298 close_command.port = port->number - port->serial->minor + 1;
1299 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1300}
1301
1302
1303/*****************************************************************************
1304 * Connect Tech's White Heat utility functions
1305 *****************************************************************************/
1306static int start_command_port(struct usb_serial *serial)
1307{
1308 struct usb_serial_port *command_port;
1309 struct whiteheat_command_private *command_info;
1310 unsigned long flags;
1311 int retval = 0;
1312
1313 command_port = serial->port[COMMAND_PORT];
1314 command_info = usb_get_serial_port_data(command_port);
1315 spin_lock_irqsave(&command_info->lock, flags);
1316 if (!command_info->port_running) {
1317 /* Work around HCD bugs */
1318 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1319
1320 command_port->read_urb->dev = serial->dev;
1321 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1322 if (retval) {
1323 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1324 goto exit;
1325 }
1326 }
1327 command_info->port_running++;
1328
1329exit:
1330 spin_unlock_irqrestore(&command_info->lock, flags);
1331 return retval;
1332}
1333
1334
1335static void stop_command_port(struct usb_serial *serial)
1336{
1337 struct usb_serial_port *command_port;
1338 struct whiteheat_command_private *command_info;
1339 unsigned long flags;
1340
1341 command_port = serial->port[COMMAND_PORT];
1342 command_info = usb_get_serial_port_data(command_port);
1343 spin_lock_irqsave(&command_info->lock, flags);
1344 command_info->port_running--;
1345 if (!command_info->port_running)
1346 usb_kill_urb(command_port->read_urb);
1347 spin_unlock_irqrestore(&command_info->lock, flags);
1348}
1349
1350
1351static int start_port_read(struct usb_serial_port *port)
1352{
1353 struct whiteheat_private *info = usb_get_serial_port_data(port);
1354 struct whiteheat_urb_wrap *wrap;
1355 struct urb *urb;
1356 int retval = 0;
1357 unsigned long flags;
1358 struct list_head *tmp;
1359 struct list_head *tmp2;
1360
1361 spin_lock_irqsave(&info->lock, flags);
1362
1363 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1364 list_del(tmp);
1365 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1366 urb = wrap->urb;
1367 urb->dev = port->serial->dev;
1368 retval = usb_submit_urb(urb, GFP_KERNEL);
1369 if (retval) {
1370 list_add(tmp, &info->rx_urbs_free);
1371 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1372 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1373 urb = wrap->urb;
1374 usb_kill_urb(urb);
1375 list_del(tmp);
1376 list_add(tmp, &info->rx_urbs_free);
1377 }
1378 break;
1379 }
1380 list_add(tmp, &info->rx_urbs_submitted);
1381 }
1382
1383 spin_unlock_irqrestore(&info->lock, flags);
1384
1385 return retval;
1386}
1387
1388
1389static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1390{
1391 struct whiteheat_urb_wrap *wrap;
1392 struct list_head *tmp;
1393
1394 list_for_each(tmp, head) {
1395 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1396 if (wrap->urb == urb)
1397 return wrap;
1398 }
1399
1400 return NULL;
1401}
1402
1403
1404static struct list_head *list_first(struct list_head *head)
1405{
1406 return head->next;
1407}
1408
1409
1410static void rx_data_softint(void *private)
1411{
1412 struct usb_serial_port *port = (struct usb_serial_port *)private;
1413 struct whiteheat_private *info = usb_get_serial_port_data(port);
1414 struct tty_struct *tty = port->tty;
1415 struct whiteheat_urb_wrap *wrap;
1416 struct urb *urb;
1417 unsigned long flags;
1418 struct list_head *tmp;
1419 struct list_head *tmp2;
1420 int result;
1421 int sent = 0;
1422
1423 spin_lock_irqsave(&info->lock, flags);
1424 if (info->flags & THROTTLED) {
1425 spin_unlock_irqrestore(&info->lock, flags);
1426 return;
1427 }
1428
1429 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1430 list_del(tmp);
1431 spin_unlock_irqrestore(&info->lock, flags);
1432
1433 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1434 urb = wrap->urb;
1435
1436 if (tty && urb->actual_length) {
1437 if (urb->actual_length > TTY_FLIPBUF_SIZE - tty->flip.count) {
1438 spin_lock_irqsave(&info->lock, flags);
1439 list_add(tmp, &info->rx_urb_q);
1440 spin_unlock_irqrestore(&info->lock, flags);
1441 tty_flip_buffer_push(tty);
1442 schedule_work(&info->rx_work);
1443 return;
1444 }
1445
1446 memcpy(tty->flip.char_buf_ptr, urb->transfer_buffer, urb->actual_length);
1447 tty->flip.char_buf_ptr += urb->actual_length;
1448 tty->flip.count += urb->actual_length;
1449 sent += urb->actual_length;
1450 }
1451
1452 urb->dev = port->serial->dev;
1453 result = usb_submit_urb(urb, GFP_ATOMIC);
1454 if (result) {
1455 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1456 spin_lock_irqsave(&info->lock, flags);
1457 list_add(tmp, &info->rx_urbs_free);
1458 continue;
1459 }
1460
1461 spin_lock_irqsave(&info->lock, flags);
1462 list_add(tmp, &info->rx_urbs_submitted);
1463 }
1464 spin_unlock_irqrestore(&info->lock, flags);
1465
1466 if (sent)
1467 tty_flip_buffer_push(tty);
1468}
1469
1470
1471/*****************************************************************************
1472 * Connect Tech's White Heat module functions
1473 *****************************************************************************/
1474static int __init whiteheat_init (void)
1475{
1476 int retval;
1477 retval = usb_serial_register(&whiteheat_fake_device);
1478 if (retval)
1479 goto failed_fake_register;
1480 retval = usb_serial_register(&whiteheat_device);
1481 if (retval)
1482 goto failed_device_register;
1483 retval = usb_register(&whiteheat_driver);
1484 if (retval)
1485 goto failed_usb_register;
1486 info(DRIVER_DESC " " DRIVER_VERSION);
1487 return 0;
1488failed_usb_register:
1489 usb_serial_deregister(&whiteheat_device);
1490failed_device_register:
1491 usb_serial_deregister(&whiteheat_fake_device);
1492failed_fake_register:
1493 return retval;
1494}
1495
1496
1497static void __exit whiteheat_exit (void)
1498{
1499 usb_deregister (&whiteheat_driver);
1500 usb_serial_deregister (&whiteheat_fake_device);
1501 usb_serial_deregister (&whiteheat_device);
1502}
1503
1504
1505module_init(whiteheat_init);
1506module_exit(whiteheat_exit);
1507
1508MODULE_AUTHOR( DRIVER_AUTHOR );
1509MODULE_DESCRIPTION( DRIVER_DESC );
1510MODULE_LICENSE("GPL");
1511
1512module_param(urb_pool_size, int, 0);
1513MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1514
1515module_param(debug, bool, S_IRUGO | S_IWUSR);
1516MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux 6.x block layer and io_uring tree(s)