diff options
author | Jarod Wilson <jarod@redhat.com> | 2010-07-26 19:31:11 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 15:43:28 -0400 |
commit | c5ac4571171cb4db94581e9e7a03b9dc08a7df19 (patch) | |
tree | a53f072fec421bf0dc98f8c53cc1fc78192b42fb | |
parent | 805a8966659563df68ea7bbd94241dafd645c725 (diff) |
V4L/DVB: staging/lirc: add lirc_sasem driver
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r-- | drivers/staging/lirc/lirc_sasem.c | 933 |
1 files changed, 933 insertions, 0 deletions
diff --git a/drivers/staging/lirc/lirc_sasem.c b/drivers/staging/lirc/lirc_sasem.c new file mode 100644 index 000000000000..9e516a112c29 --- /dev/null +++ b/drivers/staging/lirc/lirc_sasem.c | |||
@@ -0,0 +1,933 @@ | |||
1 | /* | ||
2 | * lirc_sasem.c - USB remote support for LIRC | ||
3 | * Version 0.5 | ||
4 | * | ||
5 | * Copyright (C) 2004-2005 Oliver Stabel <oliver.stabel@gmx.de> | ||
6 | * Tim Davies <tim@opensystems.net.au> | ||
7 | * | ||
8 | * This driver was derived from: | ||
9 | * Venky Raju <dev@venky.ws> | ||
10 | * "lirc_imon - "LIRC/VFD driver for Ahanix/Soundgraph IMON IR/VFD" | ||
11 | * Paul Miller <pmiller9@users.sourceforge.net>'s 2003-2004 | ||
12 | * "lirc_atiusb - USB remote support for LIRC" | ||
13 | * Culver Consulting Services <henry@culcon.com>'s 2003 | ||
14 | * "Sasem OnAir VFD/IR USB driver" | ||
15 | * | ||
16 | * | ||
17 | * NOTE - The LCDproc iMon driver should work with this module. More info at | ||
18 | * http://www.frogstorm.info/sasem | ||
19 | */ | ||
20 | |||
21 | /* | ||
22 | * This program is free software; you can redistribute it and/or modify | ||
23 | * it under the terms of the GNU General Public License as published by | ||
24 | * the Free Software Foundation; either version 2 of the License, or | ||
25 | * (at your option) any later version. | ||
26 | * | ||
27 | * This program is distributed in the hope that it will be useful, | ||
28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
30 | * GNU General Public License for more details. | ||
31 | * | ||
32 | * You should have received a copy of the GNU General Public License | ||
33 | * along with this program; if not, write to the Free Software | ||
34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
35 | */ | ||
36 | |||
37 | #include <linux/errno.h> | ||
38 | #include <linux/init.h> | ||
39 | #include <linux/kernel.h> | ||
40 | #include <linux/module.h> | ||
41 | #include <linux/slab.h> | ||
42 | #include <linux/uaccess.h> | ||
43 | #include <linux/usb.h> | ||
44 | |||
45 | #include <media/lirc.h> | ||
46 | #include <media/lirc_dev.h> | ||
47 | |||
48 | |||
49 | #define MOD_AUTHOR "Oliver Stabel <oliver.stabel@gmx.de>, " \ | ||
50 | "Tim Davies <tim@opensystems.net.au>" | ||
51 | #define MOD_DESC "USB Driver for Sasem Remote Controller V1.1" | ||
52 | #define MOD_NAME "lirc_sasem" | ||
53 | #define MOD_VERSION "0.5" | ||
54 | |||
55 | #define VFD_MINOR_BASE 144 /* Same as LCD */ | ||
56 | #define DEVICE_NAME "lcd%d" | ||
57 | |||
58 | #define BUF_CHUNK_SIZE 8 | ||
59 | #define BUF_SIZE 128 | ||
60 | |||
61 | #define IOCTL_LCD_CONTRAST 1 | ||
62 | |||
63 | /*** P R O T O T Y P E S ***/ | ||
64 | |||
65 | /* USB Callback prototypes */ | ||
66 | static int sasem_probe(struct usb_interface *interface, | ||
67 | const struct usb_device_id *id); | ||
68 | static void sasem_disconnect(struct usb_interface *interface); | ||
69 | static void usb_rx_callback(struct urb *urb); | ||
70 | static void usb_tx_callback(struct urb *urb); | ||
71 | |||
72 | /* VFD file_operations function prototypes */ | ||
73 | static int vfd_open(struct inode *inode, struct file *file); | ||
74 | static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg); | ||
75 | static int vfd_close(struct inode *inode, struct file *file); | ||
76 | static ssize_t vfd_write(struct file *file, const char *buf, | ||
77 | size_t n_bytes, loff_t *pos); | ||
78 | |||
79 | /* LIRC driver function prototypes */ | ||
80 | static int ir_open(void *data); | ||
81 | static void ir_close(void *data); | ||
82 | |||
83 | /* Driver init/exit prototypes */ | ||
84 | static int __init sasem_init(void); | ||
85 | static void __exit sasem_exit(void); | ||
86 | |||
87 | /*** G L O B A L S ***/ | ||
88 | #define SASEM_DATA_BUF_SZ 32 | ||
89 | |||
90 | struct sasem_context { | ||
91 | |||
92 | struct usb_device *dev; | ||
93 | int vfd_isopen; /* VFD port has been opened */ | ||
94 | unsigned int vfd_contrast; /* VFD contrast */ | ||
95 | int ir_isopen; /* IR port has been opened */ | ||
96 | int dev_present; /* USB device presence */ | ||
97 | struct mutex ctx_lock; /* to lock this object */ | ||
98 | wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ | ||
99 | |||
100 | struct lirc_driver *driver; | ||
101 | struct usb_endpoint_descriptor *rx_endpoint; | ||
102 | struct usb_endpoint_descriptor *tx_endpoint; | ||
103 | struct urb *rx_urb; | ||
104 | struct urb *tx_urb; | ||
105 | unsigned char usb_rx_buf[8]; | ||
106 | unsigned char usb_tx_buf[8]; | ||
107 | |||
108 | struct tx_t { | ||
109 | unsigned char data_buf[SASEM_DATA_BUF_SZ]; /* user data buffer */ | ||
110 | struct completion finished; /* wait for write to finish */ | ||
111 | atomic_t busy; /* write in progress */ | ||
112 | int status; /* status of tx completion */ | ||
113 | } tx; | ||
114 | |||
115 | /* for dealing with repeat codes (wish there was a toggle bit!) */ | ||
116 | struct timeval presstime; | ||
117 | char lastcode[8]; | ||
118 | int codesaved; | ||
119 | }; | ||
120 | |||
121 | /* VFD file operations */ | ||
122 | static struct file_operations vfd_fops = { | ||
123 | .owner = THIS_MODULE, | ||
124 | .open = &vfd_open, | ||
125 | .write = &vfd_write, | ||
126 | .unlocked_ioctl = &vfd_ioctl, | ||
127 | .release = &vfd_close, | ||
128 | }; | ||
129 | |||
130 | /* USB Device ID for Sasem USB Control Board */ | ||
131 | static struct usb_device_id sasem_usb_id_table[] = { | ||
132 | /* Sasem USB Control Board */ | ||
133 | { USB_DEVICE(0x11ba, 0x0101) }, | ||
134 | /* Terminating entry */ | ||
135 | {} | ||
136 | }; | ||
137 | |||
138 | /* USB Device data */ | ||
139 | static struct usb_driver sasem_driver = { | ||
140 | .name = MOD_NAME, | ||
141 | .probe = sasem_probe, | ||
142 | .disconnect = sasem_disconnect, | ||
143 | .id_table = sasem_usb_id_table, | ||
144 | }; | ||
145 | |||
146 | static struct usb_class_driver sasem_class = { | ||
147 | .name = DEVICE_NAME, | ||
148 | .fops = &vfd_fops, | ||
149 | .minor_base = VFD_MINOR_BASE, | ||
150 | }; | ||
151 | |||
152 | /* to prevent races between open() and disconnect() */ | ||
153 | static DEFINE_MUTEX(disconnect_lock); | ||
154 | |||
155 | static int debug; | ||
156 | |||
157 | |||
158 | /*** M O D U L E C O D E ***/ | ||
159 | |||
160 | MODULE_AUTHOR(MOD_AUTHOR); | ||
161 | MODULE_DESCRIPTION(MOD_DESC); | ||
162 | MODULE_LICENSE("GPL"); | ||
163 | module_param(debug, int, S_IRUGO | S_IWUSR); | ||
164 | MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); | ||
165 | |||
166 | static void delete_context(struct sasem_context *context) | ||
167 | { | ||
168 | usb_free_urb(context->tx_urb); /* VFD */ | ||
169 | usb_free_urb(context->rx_urb); /* IR */ | ||
170 | lirc_buffer_free(context->driver->rbuf); | ||
171 | kfree(context->driver->rbuf); | ||
172 | kfree(context->driver); | ||
173 | kfree(context); | ||
174 | |||
175 | if (debug) | ||
176 | printk(KERN_INFO "%s: context deleted\n", __func__); | ||
177 | } | ||
178 | |||
179 | static void deregister_from_lirc(struct sasem_context *context) | ||
180 | { | ||
181 | int retval; | ||
182 | int minor = context->driver->minor; | ||
183 | |||
184 | retval = lirc_unregister_driver(minor); | ||
185 | if (retval) | ||
186 | err("%s: unable to deregister from lirc (%d)", | ||
187 | __func__, retval); | ||
188 | else | ||
189 | printk(KERN_INFO "Deregistered Sasem driver (minor:%d)\n", | ||
190 | minor); | ||
191 | |||
192 | } | ||
193 | |||
194 | /** | ||
195 | * Called when the VFD device (e.g. /dev/usb/lcd) | ||
196 | * is opened by the application. | ||
197 | */ | ||
198 | static int vfd_open(struct inode *inode, struct file *file) | ||
199 | { | ||
200 | struct usb_interface *interface; | ||
201 | struct sasem_context *context = NULL; | ||
202 | int subminor; | ||
203 | int retval = 0; | ||
204 | |||
205 | /* prevent races with disconnect */ | ||
206 | mutex_lock(&disconnect_lock); | ||
207 | |||
208 | subminor = iminor(inode); | ||
209 | interface = usb_find_interface(&sasem_driver, subminor); | ||
210 | if (!interface) { | ||
211 | err("%s: could not find interface for minor %d", | ||
212 | __func__, subminor); | ||
213 | retval = -ENODEV; | ||
214 | goto exit; | ||
215 | } | ||
216 | context = usb_get_intfdata(interface); | ||
217 | |||
218 | if (!context) { | ||
219 | err("%s: no context found for minor %d", | ||
220 | __func__, subminor); | ||
221 | retval = -ENODEV; | ||
222 | goto exit; | ||
223 | } | ||
224 | |||
225 | mutex_lock(&context->ctx_lock); | ||
226 | |||
227 | if (context->vfd_isopen) { | ||
228 | err("%s: VFD port is already open", __func__); | ||
229 | retval = -EBUSY; | ||
230 | } else { | ||
231 | context->vfd_isopen = 1; | ||
232 | file->private_data = context; | ||
233 | printk(KERN_INFO "VFD port opened\n"); | ||
234 | } | ||
235 | |||
236 | mutex_unlock(&context->ctx_lock); | ||
237 | |||
238 | exit: | ||
239 | mutex_unlock(&disconnect_lock); | ||
240 | return retval; | ||
241 | } | ||
242 | |||
243 | /** | ||
244 | * Called when the VFD device (e.g. /dev/usb/lcd) | ||
245 | * is closed by the application. | ||
246 | */ | ||
247 | static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg) | ||
248 | { | ||
249 | struct sasem_context *context = NULL; | ||
250 | |||
251 | context = (struct sasem_context *) file->private_data; | ||
252 | |||
253 | if (!context) { | ||
254 | err("%s: no context for device", __func__); | ||
255 | return -ENODEV; | ||
256 | } | ||
257 | |||
258 | mutex_lock(&context->ctx_lock); | ||
259 | |||
260 | switch (cmd) { | ||
261 | case IOCTL_LCD_CONTRAST: | ||
262 | if (arg > 1000) | ||
263 | arg = 1000; | ||
264 | context->vfd_contrast = (unsigned int)arg; | ||
265 | break; | ||
266 | default: | ||
267 | printk(KERN_INFO "Unknown IOCTL command\n"); | ||
268 | mutex_unlock(&context->ctx_lock); | ||
269 | return -ENOIOCTLCMD; /* not supported */ | ||
270 | } | ||
271 | |||
272 | mutex_unlock(&context->ctx_lock); | ||
273 | return 0; | ||
274 | } | ||
275 | |||
276 | /** | ||
277 | * Called when the VFD device (e.g. /dev/usb/lcd) | ||
278 | * is closed by the application. | ||
279 | */ | ||
280 | static int vfd_close(struct inode *inode, struct file *file) | ||
281 | { | ||
282 | struct sasem_context *context = NULL; | ||
283 | int retval = 0; | ||
284 | |||
285 | context = (struct sasem_context *) file->private_data; | ||
286 | |||
287 | if (!context) { | ||
288 | err("%s: no context for device", __func__); | ||
289 | return -ENODEV; | ||
290 | } | ||
291 | |||
292 | mutex_lock(&context->ctx_lock); | ||
293 | |||
294 | if (!context->vfd_isopen) { | ||
295 | err("%s: VFD is not open", __func__); | ||
296 | retval = -EIO; | ||
297 | } else { | ||
298 | context->vfd_isopen = 0; | ||
299 | printk(KERN_INFO "VFD port closed\n"); | ||
300 | if (!context->dev_present && !context->ir_isopen) { | ||
301 | |||
302 | /* Device disconnected before close and IR port is | ||
303 | * not open. If IR port is open, context will be | ||
304 | * deleted by ir_close. */ | ||
305 | mutex_unlock(&context->ctx_lock); | ||
306 | delete_context(context); | ||
307 | return retval; | ||
308 | } | ||
309 | } | ||
310 | |||
311 | mutex_unlock(&context->ctx_lock); | ||
312 | return retval; | ||
313 | } | ||
314 | |||
315 | /** | ||
316 | * Sends a packet to the VFD. | ||
317 | */ | ||
318 | static int send_packet(struct sasem_context *context) | ||
319 | { | ||
320 | unsigned int pipe; | ||
321 | int interval = 0; | ||
322 | int retval = 0; | ||
323 | |||
324 | pipe = usb_sndintpipe(context->dev, | ||
325 | context->tx_endpoint->bEndpointAddress); | ||
326 | interval = context->tx_endpoint->bInterval; | ||
327 | |||
328 | usb_fill_int_urb(context->tx_urb, context->dev, pipe, | ||
329 | context->usb_tx_buf, sizeof(context->usb_tx_buf), | ||
330 | usb_tx_callback, context, interval); | ||
331 | |||
332 | context->tx_urb->actual_length = 0; | ||
333 | |||
334 | init_completion(&context->tx.finished); | ||
335 | atomic_set(&(context->tx.busy), 1); | ||
336 | |||
337 | retval = usb_submit_urb(context->tx_urb, GFP_KERNEL); | ||
338 | if (retval) { | ||
339 | atomic_set(&(context->tx.busy), 0); | ||
340 | err("%s: error submitting urb (%d)", __func__, retval); | ||
341 | } else { | ||
342 | /* Wait for transmission to complete (or abort) */ | ||
343 | mutex_unlock(&context->ctx_lock); | ||
344 | wait_for_completion(&context->tx.finished); | ||
345 | mutex_lock(&context->ctx_lock); | ||
346 | |||
347 | retval = context->tx.status; | ||
348 | if (retval) | ||
349 | err("%s: packet tx failed (%d)", __func__, retval); | ||
350 | } | ||
351 | |||
352 | return retval; | ||
353 | } | ||
354 | |||
355 | /** | ||
356 | * Writes data to the VFD. The Sasem VFD is 2x16 characters | ||
357 | * and requires data in 9 consecutive USB interrupt packets, | ||
358 | * each packet carrying 8 bytes. | ||
359 | */ | ||
360 | static ssize_t vfd_write(struct file *file, const char *buf, | ||
361 | size_t n_bytes, loff_t *pos) | ||
362 | { | ||
363 | int i; | ||
364 | int retval = 0; | ||
365 | struct sasem_context *context; | ||
366 | int *data_buf; | ||
367 | |||
368 | context = (struct sasem_context *) file->private_data; | ||
369 | if (!context) { | ||
370 | err("%s: no context for device", __func__); | ||
371 | return -ENODEV; | ||
372 | } | ||
373 | |||
374 | mutex_lock(&context->ctx_lock); | ||
375 | |||
376 | if (!context->dev_present) { | ||
377 | err("%s: no Sasem device present", __func__); | ||
378 | retval = -ENODEV; | ||
379 | goto exit; | ||
380 | } | ||
381 | |||
382 | if (n_bytes <= 0 || n_bytes > SASEM_DATA_BUF_SZ) { | ||
383 | err("%s: invalid payload size", __func__); | ||
384 | retval = -EINVAL; | ||
385 | goto exit; | ||
386 | } | ||
387 | |||
388 | data_buf = memdup_user(buf, n_bytes); | ||
389 | if (PTR_ERR(data_buf)) | ||
390 | return PTR_ERR(data_buf); | ||
391 | |||
392 | memcpy(context->tx.data_buf, data_buf, n_bytes); | ||
393 | |||
394 | /* Pad with spaces */ | ||
395 | for (i = n_bytes; i < SASEM_DATA_BUF_SZ; ++i) | ||
396 | context->tx.data_buf[i] = ' '; | ||
397 | |||
398 | /* Nine 8 byte packets to be sent */ | ||
399 | /* NOTE: "\x07\x01\0\0\0\0\0\0" or "\x0c\0\0\0\0\0\0\0" | ||
400 | * will clear the VFD */ | ||
401 | for (i = 0; i < 9; i++) { | ||
402 | switch (i) { | ||
403 | case 0: | ||
404 | memcpy(context->usb_tx_buf, "\x07\0\0\0\0\0\0\0", 8); | ||
405 | context->usb_tx_buf[1] = (context->vfd_contrast) ? | ||
406 | (0x2B - (context->vfd_contrast - 1) / 250) | ||
407 | : 0x2B; | ||
408 | break; | ||
409 | case 1: | ||
410 | memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8); | ||
411 | break; | ||
412 | case 2: | ||
413 | memcpy(context->usb_tx_buf, "\x0b\x01\0\0\0\0\0\0", 8); | ||
414 | break; | ||
415 | case 3: | ||
416 | memcpy(context->usb_tx_buf, context->tx.data_buf, 8); | ||
417 | break; | ||
418 | case 4: | ||
419 | memcpy(context->usb_tx_buf, | ||
420 | context->tx.data_buf + 8, 8); | ||
421 | break; | ||
422 | case 5: | ||
423 | memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8); | ||
424 | break; | ||
425 | case 6: | ||
426 | memcpy(context->usb_tx_buf, "\x0b\x02\0\0\0\0\0\0", 8); | ||
427 | break; | ||
428 | case 7: | ||
429 | memcpy(context->usb_tx_buf, | ||
430 | context->tx.data_buf + 16, 8); | ||
431 | break; | ||
432 | case 8: | ||
433 | memcpy(context->usb_tx_buf, | ||
434 | context->tx.data_buf + 24, 8); | ||
435 | break; | ||
436 | } | ||
437 | retval = send_packet(context); | ||
438 | if (retval) { | ||
439 | |||
440 | err("%s: send packet failed for packet #%d", | ||
441 | __func__, i); | ||
442 | goto exit; | ||
443 | } | ||
444 | } | ||
445 | exit: | ||
446 | |||
447 | mutex_unlock(&context->ctx_lock); | ||
448 | |||
449 | return (!retval) ? n_bytes : retval; | ||
450 | } | ||
451 | |||
452 | /** | ||
453 | * Callback function for USB core API: transmit data | ||
454 | */ | ||
455 | static void usb_tx_callback(struct urb *urb) | ||
456 | { | ||
457 | struct sasem_context *context; | ||
458 | |||
459 | if (!urb) | ||
460 | return; | ||
461 | context = (struct sasem_context *) urb->context; | ||
462 | if (!context) | ||
463 | return; | ||
464 | |||
465 | context->tx.status = urb->status; | ||
466 | |||
467 | /* notify waiters that write has finished */ | ||
468 | atomic_set(&context->tx.busy, 0); | ||
469 | complete(&context->tx.finished); | ||
470 | |||
471 | return; | ||
472 | } | ||
473 | |||
474 | /** | ||
475 | * Called by lirc_dev when the application opens /dev/lirc | ||
476 | */ | ||
477 | static int ir_open(void *data) | ||
478 | { | ||
479 | int retval = 0; | ||
480 | struct sasem_context *context; | ||
481 | |||
482 | /* prevent races with disconnect */ | ||
483 | mutex_lock(&disconnect_lock); | ||
484 | |||
485 | context = (struct sasem_context *) data; | ||
486 | |||
487 | mutex_lock(&context->ctx_lock); | ||
488 | |||
489 | if (context->ir_isopen) { | ||
490 | err("%s: IR port is already open", __func__); | ||
491 | retval = -EBUSY; | ||
492 | goto exit; | ||
493 | } | ||
494 | |||
495 | usb_fill_int_urb(context->rx_urb, context->dev, | ||
496 | usb_rcvintpipe(context->dev, | ||
497 | context->rx_endpoint->bEndpointAddress), | ||
498 | context->usb_rx_buf, sizeof(context->usb_rx_buf), | ||
499 | usb_rx_callback, context, context->rx_endpoint->bInterval); | ||
500 | |||
501 | retval = usb_submit_urb(context->rx_urb, GFP_KERNEL); | ||
502 | |||
503 | if (retval) | ||
504 | err("%s: usb_submit_urb failed for ir_open (%d)", | ||
505 | __func__, retval); | ||
506 | else { | ||
507 | context->ir_isopen = 1; | ||
508 | printk(KERN_INFO "IR port opened\n"); | ||
509 | } | ||
510 | |||
511 | exit: | ||
512 | mutex_unlock(&context->ctx_lock); | ||
513 | |||
514 | mutex_unlock(&disconnect_lock); | ||
515 | return 0; | ||
516 | } | ||
517 | |||
518 | /** | ||
519 | * Called by lirc_dev when the application closes /dev/lirc | ||
520 | */ | ||
521 | static void ir_close(void *data) | ||
522 | { | ||
523 | struct sasem_context *context; | ||
524 | |||
525 | context = (struct sasem_context *)data; | ||
526 | if (!context) { | ||
527 | err("%s: no context for device", __func__); | ||
528 | return; | ||
529 | } | ||
530 | |||
531 | mutex_lock(&context->ctx_lock); | ||
532 | |||
533 | usb_kill_urb(context->rx_urb); | ||
534 | context->ir_isopen = 0; | ||
535 | printk(KERN_INFO "IR port closed\n"); | ||
536 | |||
537 | if (!context->dev_present) { | ||
538 | |||
539 | /* | ||
540 | * Device disconnected while IR port was | ||
541 | * still open. Driver was not deregistered | ||
542 | * at disconnect time, so do it now. | ||
543 | */ | ||
544 | deregister_from_lirc(context); | ||
545 | |||
546 | if (!context->vfd_isopen) { | ||
547 | |||
548 | mutex_unlock(&context->ctx_lock); | ||
549 | delete_context(context); | ||
550 | return; | ||
551 | } | ||
552 | /* If VFD port is open, context will be deleted by vfd_close */ | ||
553 | } | ||
554 | |||
555 | mutex_unlock(&context->ctx_lock); | ||
556 | return; | ||
557 | } | ||
558 | |||
559 | /** | ||
560 | * Process the incoming packet | ||
561 | */ | ||
562 | static void incoming_packet(struct sasem_context *context, | ||
563 | struct urb *urb) | ||
564 | { | ||
565 | int len = urb->actual_length; | ||
566 | unsigned char *buf = urb->transfer_buffer; | ||
567 | long ms; | ||
568 | struct timeval tv; | ||
569 | |||
570 | if (len != 8) { | ||
571 | printk(KERN_WARNING "%s: invalid incoming packet size (%d)\n", | ||
572 | __func__, len); | ||
573 | return; | ||
574 | } | ||
575 | |||
576 | #ifdef DEBUG | ||
577 | int i; | ||
578 | for (i = 0; i < 8; ++i) | ||
579 | printk(KERN_INFO "%02x ", buf[i]); | ||
580 | printk(KERN_INFO "\n"); | ||
581 | #endif | ||
582 | |||
583 | /* | ||
584 | * Lirc could deal with the repeat code, but we really need to block it | ||
585 | * if it arrives too late. Otherwise we could repeat the wrong code. | ||
586 | */ | ||
587 | |||
588 | /* get the time since the last button press */ | ||
589 | do_gettimeofday(&tv); | ||
590 | ms = (tv.tv_sec - context->presstime.tv_sec) * 1000 + | ||
591 | (tv.tv_usec - context->presstime.tv_usec) / 1000; | ||
592 | |||
593 | if (memcmp(buf, "\x08\0\0\0\0\0\0\0", 8) == 0) { | ||
594 | /* | ||
595 | * the repeat code is being sent, so we copy | ||
596 | * the old code to LIRC | ||
597 | */ | ||
598 | |||
599 | /* | ||
600 | * NOTE: Only if the last code was less than 250ms ago | ||
601 | * - no one should be able to push another (undetected) button | ||
602 | * in that time and then get a false repeat of the previous | ||
603 | * press but it is long enough for a genuine repeat | ||
604 | */ | ||
605 | if ((ms < 250) && (context->codesaved != 0)) { | ||
606 | memcpy(buf, &context->lastcode, 8); | ||
607 | context->presstime.tv_sec = tv.tv_sec; | ||
608 | context->presstime.tv_usec = tv.tv_usec; | ||
609 | } | ||
610 | } else { | ||
611 | /* save the current valid code for repeats */ | ||
612 | memcpy(&context->lastcode, buf, 8); | ||
613 | /* | ||
614 | * set flag to signal a valid code was save; | ||
615 | * just for safety reasons | ||
616 | */ | ||
617 | context->codesaved = 1; | ||
618 | context->presstime.tv_sec = tv.tv_sec; | ||
619 | context->presstime.tv_usec = tv.tv_usec; | ||
620 | } | ||
621 | |||
622 | lirc_buffer_write(context->driver->rbuf, buf); | ||
623 | wake_up(&context->driver->rbuf->wait_poll); | ||
624 | } | ||
625 | |||
626 | /** | ||
627 | * Callback function for USB core API: receive data | ||
628 | */ | ||
629 | static void usb_rx_callback(struct urb *urb) | ||
630 | { | ||
631 | struct sasem_context *context; | ||
632 | |||
633 | if (!urb) | ||
634 | return; | ||
635 | context = (struct sasem_context *) urb->context; | ||
636 | if (!context) | ||
637 | return; | ||
638 | |||
639 | switch (urb->status) { | ||
640 | |||
641 | case -ENOENT: /* usbcore unlink successful! */ | ||
642 | return; | ||
643 | |||
644 | case 0: | ||
645 | if (context->ir_isopen) | ||
646 | incoming_packet(context, urb); | ||
647 | break; | ||
648 | |||
649 | default: | ||
650 | printk(KERN_WARNING "%s: status (%d): ignored", | ||
651 | __func__, urb->status); | ||
652 | break; | ||
653 | } | ||
654 | |||
655 | usb_submit_urb(context->rx_urb, GFP_ATOMIC); | ||
656 | return; | ||
657 | } | ||
658 | |||
659 | |||
660 | |||
661 | /** | ||
662 | * Callback function for USB core API: Probe | ||
663 | */ | ||
664 | static int sasem_probe(struct usb_interface *interface, | ||
665 | const struct usb_device_id *id) | ||
666 | { | ||
667 | struct usb_device *dev = NULL; | ||
668 | struct usb_host_interface *iface_desc = NULL; | ||
669 | struct usb_endpoint_descriptor *rx_endpoint = NULL; | ||
670 | struct usb_endpoint_descriptor *tx_endpoint = NULL; | ||
671 | struct urb *rx_urb = NULL; | ||
672 | struct urb *tx_urb = NULL; | ||
673 | struct lirc_driver *driver = NULL; | ||
674 | struct lirc_buffer *rbuf = NULL; | ||
675 | int lirc_minor = 0; | ||
676 | int num_endpoints; | ||
677 | int retval = 0; | ||
678 | int vfd_ep_found; | ||
679 | int ir_ep_found; | ||
680 | int alloc_status; | ||
681 | struct sasem_context *context = NULL; | ||
682 | int i; | ||
683 | |||
684 | printk(KERN_INFO "%s: found Sasem device\n", __func__); | ||
685 | |||
686 | |||
687 | dev = usb_get_dev(interface_to_usbdev(interface)); | ||
688 | iface_desc = interface->cur_altsetting; | ||
689 | num_endpoints = iface_desc->desc.bNumEndpoints; | ||
690 | |||
691 | /* | ||
692 | * Scan the endpoint list and set: | ||
693 | * first input endpoint = IR endpoint | ||
694 | * first output endpoint = VFD endpoint | ||
695 | */ | ||
696 | |||
697 | ir_ep_found = 0; | ||
698 | vfd_ep_found = 0; | ||
699 | |||
700 | for (i = 0; i < num_endpoints && !(ir_ep_found && vfd_ep_found); ++i) { | ||
701 | |||
702 | struct usb_endpoint_descriptor *ep; | ||
703 | int ep_dir; | ||
704 | int ep_type; | ||
705 | ep = &iface_desc->endpoint [i].desc; | ||
706 | ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; | ||
707 | ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; | ||
708 | |||
709 | if (!ir_ep_found && | ||
710 | ep_dir == USB_DIR_IN && | ||
711 | ep_type == USB_ENDPOINT_XFER_INT) { | ||
712 | |||
713 | rx_endpoint = ep; | ||
714 | ir_ep_found = 1; | ||
715 | if (debug) | ||
716 | printk(KERN_INFO "%s: found IR endpoint\n", | ||
717 | __func__); | ||
718 | |||
719 | } else if (!vfd_ep_found && | ||
720 | ep_dir == USB_DIR_OUT && | ||
721 | ep_type == USB_ENDPOINT_XFER_INT) { | ||
722 | |||
723 | tx_endpoint = ep; | ||
724 | vfd_ep_found = 1; | ||
725 | if (debug) | ||
726 | printk(KERN_INFO "%s: found VFD endpoint\n", | ||
727 | __func__); | ||
728 | } | ||
729 | } | ||
730 | |||
731 | /* Input endpoint is mandatory */ | ||
732 | if (!ir_ep_found) { | ||
733 | |||
734 | err("%s: no valid input (IR) endpoint found.", __func__); | ||
735 | retval = -ENODEV; | ||
736 | goto exit; | ||
737 | } | ||
738 | |||
739 | if (!vfd_ep_found) | ||
740 | printk(KERN_INFO "%s: no valid output (VFD) endpoint found.\n", | ||
741 | __func__); | ||
742 | |||
743 | |||
744 | /* Allocate memory */ | ||
745 | alloc_status = 0; | ||
746 | |||
747 | context = kzalloc(sizeof(struct sasem_context), GFP_KERNEL); | ||
748 | if (!context) { | ||
749 | err("%s: kzalloc failed for context", __func__); | ||
750 | alloc_status = 1; | ||
751 | goto alloc_status_switch; | ||
752 | } | ||
753 | driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); | ||
754 | if (!driver) { | ||
755 | err("%s: kzalloc failed for lirc_driver", __func__); | ||
756 | alloc_status = 2; | ||
757 | goto alloc_status_switch; | ||
758 | } | ||
759 | rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL); | ||
760 | if (!rbuf) { | ||
761 | err("%s: kmalloc failed for lirc_buffer", __func__); | ||
762 | alloc_status = 3; | ||
763 | goto alloc_status_switch; | ||
764 | } | ||
765 | if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) { | ||
766 | err("%s: lirc_buffer_init failed", __func__); | ||
767 | alloc_status = 4; | ||
768 | goto alloc_status_switch; | ||
769 | } | ||
770 | rx_urb = usb_alloc_urb(0, GFP_KERNEL); | ||
771 | if (!rx_urb) { | ||
772 | err("%s: usb_alloc_urb failed for IR urb", __func__); | ||
773 | alloc_status = 5; | ||
774 | goto alloc_status_switch; | ||
775 | } | ||
776 | if (vfd_ep_found) { | ||
777 | tx_urb = usb_alloc_urb(0, GFP_KERNEL); | ||
778 | if (!tx_urb) { | ||
779 | err("%s: usb_alloc_urb failed for VFD urb", | ||
780 | __func__); | ||
781 | alloc_status = 6; | ||
782 | goto alloc_status_switch; | ||
783 | } | ||
784 | } | ||
785 | |||
786 | mutex_init(&context->ctx_lock); | ||
787 | |||
788 | strcpy(driver->name, MOD_NAME); | ||
789 | driver->minor = -1; | ||
790 | driver->code_length = 64; | ||
791 | driver->sample_rate = 0; | ||
792 | driver->features = LIRC_CAN_REC_LIRCCODE; | ||
793 | driver->data = context; | ||
794 | driver->rbuf = rbuf; | ||
795 | driver->set_use_inc = ir_open; | ||
796 | driver->set_use_dec = ir_close; | ||
797 | driver->dev = &interface->dev; | ||
798 | driver->owner = THIS_MODULE; | ||
799 | |||
800 | mutex_lock(&context->ctx_lock); | ||
801 | |||
802 | lirc_minor = lirc_register_driver(driver); | ||
803 | if (lirc_minor < 0) { | ||
804 | err("%s: lirc_register_driver failed", __func__); | ||
805 | alloc_status = 7; | ||
806 | mutex_unlock(&context->ctx_lock); | ||
807 | } else | ||
808 | printk(KERN_INFO "%s: Registered Sasem driver (minor:%d)\n", | ||
809 | __func__, lirc_minor); | ||
810 | |||
811 | alloc_status_switch: | ||
812 | |||
813 | switch (alloc_status) { | ||
814 | |||
815 | case 7: | ||
816 | if (vfd_ep_found) | ||
817 | usb_free_urb(tx_urb); | ||
818 | case 6: | ||
819 | usb_free_urb(rx_urb); | ||
820 | case 5: | ||
821 | lirc_buffer_free(rbuf); | ||
822 | case 4: | ||
823 | kfree(rbuf); | ||
824 | case 3: | ||
825 | kfree(driver); | ||
826 | case 2: | ||
827 | kfree(context); | ||
828 | context = NULL; | ||
829 | case 1: | ||
830 | retval = -ENOMEM; | ||
831 | goto exit; | ||
832 | } | ||
833 | |||
834 | /* Needed while unregistering! */ | ||
835 | driver->minor = lirc_minor; | ||
836 | |||
837 | context->dev = dev; | ||
838 | context->dev_present = 1; | ||
839 | context->rx_endpoint = rx_endpoint; | ||
840 | context->rx_urb = rx_urb; | ||
841 | if (vfd_ep_found) { | ||
842 | context->tx_endpoint = tx_endpoint; | ||
843 | context->tx_urb = tx_urb; | ||
844 | context->vfd_contrast = 1000; /* range 0 - 1000 */ | ||
845 | } | ||
846 | context->driver = driver; | ||
847 | |||
848 | usb_set_intfdata(interface, context); | ||
849 | |||
850 | if (vfd_ep_found) { | ||
851 | |||
852 | if (debug) | ||
853 | printk(KERN_INFO "Registering VFD with sysfs\n"); | ||
854 | if (usb_register_dev(interface, &sasem_class)) | ||
855 | /* Not a fatal error, so ignore */ | ||
856 | printk(KERN_INFO "%s: could not get a minor number " | ||
857 | "for VFD\n", __func__); | ||
858 | } | ||
859 | |||
860 | printk(KERN_INFO "%s: Sasem device on usb<%d:%d> initialized\n", | ||
861 | __func__, dev->bus->busnum, dev->devnum); | ||
862 | |||
863 | mutex_unlock(&context->ctx_lock); | ||
864 | exit: | ||
865 | return retval; | ||
866 | } | ||
867 | |||
868 | /** | ||
869 | * Callback function for USB core API: disonnect | ||
870 | */ | ||
871 | static void sasem_disconnect(struct usb_interface *interface) | ||
872 | { | ||
873 | struct sasem_context *context; | ||
874 | |||
875 | /* prevent races with ir_open()/vfd_open() */ | ||
876 | mutex_lock(&disconnect_lock); | ||
877 | |||
878 | context = usb_get_intfdata(interface); | ||
879 | mutex_lock(&context->ctx_lock); | ||
880 | |||
881 | printk(KERN_INFO "%s: Sasem device disconnected\n", __func__); | ||
882 | |||
883 | usb_set_intfdata(interface, NULL); | ||
884 | context->dev_present = 0; | ||
885 | |||
886 | /* Stop reception */ | ||
887 | usb_kill_urb(context->rx_urb); | ||
888 | |||
889 | /* Abort ongoing write */ | ||
890 | if (atomic_read(&context->tx.busy)) { | ||
891 | |||
892 | usb_kill_urb(context->tx_urb); | ||
893 | wait_for_completion(&context->tx.finished); | ||
894 | } | ||
895 | |||
896 | /* De-register from lirc_dev if IR port is not open */ | ||
897 | if (!context->ir_isopen) | ||
898 | deregister_from_lirc(context); | ||
899 | |||
900 | usb_deregister_dev(interface, &sasem_class); | ||
901 | |||
902 | mutex_unlock(&context->ctx_lock); | ||
903 | |||
904 | if (!context->ir_isopen && !context->vfd_isopen) | ||
905 | delete_context(context); | ||
906 | |||
907 | mutex_unlock(&disconnect_lock); | ||
908 | } | ||
909 | |||
910 | static int __init sasem_init(void) | ||
911 | { | ||
912 | int rc; | ||
913 | |||
914 | printk(KERN_INFO MOD_DESC ", v" MOD_VERSION "\n"); | ||
915 | printk(KERN_INFO MOD_AUTHOR "\n"); | ||
916 | |||
917 | rc = usb_register(&sasem_driver); | ||
918 | if (rc < 0) { | ||
919 | err("%s: usb register failed (%d)", __func__, rc); | ||
920 | return -ENODEV; | ||
921 | } | ||
922 | return 0; | ||
923 | } | ||
924 | |||
925 | static void __exit sasem_exit(void) | ||
926 | { | ||
927 | usb_deregister(&sasem_driver); | ||
928 | printk(KERN_INFO "module removed. Goodbye!\n"); | ||
929 | } | ||
930 | |||
931 | |||
932 | module_init(sasem_init); | ||
933 | module_exit(sasem_exit); | ||