Commit | Line | Data |
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2aa72f3b AK |
1 | /* |
2 | * A driver for the AverMedia MR 800 USB FM radio. This device plugs | |
3 | * into both the USB and an analog audio input, so this thing | |
4 | * only deals with initialization and frequency setting, the | |
5 | * audio data has to be handled by a sound driver. | |
6 | * | |
7 | * Copyright (c) 2008 Alexey Klimov <klimov.linux@gmail.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Big thanks to authors of dsbr100.c and radio-si470x.c | |
26 | * | |
27 | * When work was looked pretty good, i discover this: | |
28 | * http://av-usbradio.sourceforge.net/index.php | |
29 | * http://sourceforge.net/projects/av-usbradio/ | |
30 | * Latest release of theirs project was in 2005. | |
31 | * Probably, this driver could be improved trough using their | |
32 | * achievements (specifications given). | |
33 | * So, we have smth to begin with. | |
34 | * | |
35 | * History: | |
36 | * Version 0.01: First working version. | |
37 | * It's required to blacklist AverMedia USB Radio | |
38 | * in usbhid/hid-quirks.c | |
39 | * | |
40 | * Many things to do: | |
41 | * - Correct power managment of device (suspend & resume) | |
42 | * - Make x86 independance (little-endian and big-endian stuff) | |
43 | * - Add code for scanning and smooth tuning | |
44 | * - Checked and add stereo&mono stuff | |
45 | * - Add code for sensitivity value | |
46 | * - Correct mistakes | |
47 | * - In Japan another FREQ_MIN and FREQ_MAX | |
48 | */ | |
49 | ||
50 | /* kernel includes */ | |
51 | #include <linux/kernel.h> | |
52 | #include <linux/module.h> | |
53 | #include <linux/init.h> | |
54 | #include <linux/slab.h> | |
55 | #include <linux/input.h> | |
56 | #include <linux/videodev2.h> | |
57 | #include <media/v4l2-common.h> | |
58 | #include <media/v4l2-ioctl.h> | |
59 | #include <linux/usb.h> | |
60 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
61 | ||
62 | /* driver and module definitions */ | |
63 | #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" | |
64 | #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" | |
65 | #define DRIVER_VERSION "0.01" | |
66 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 1) | |
67 | ||
68 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
69 | MODULE_DESCRIPTION(DRIVER_DESC); | |
70 | MODULE_LICENSE("GPL"); | |
71 | ||
72 | #define USB_AMRADIO_VENDOR 0x07ca | |
73 | #define USB_AMRADIO_PRODUCT 0xb800 | |
74 | ||
e60b022e AK |
75 | /* dev_warn macro with driver name */ |
76 | #define MR800_DRIVER_NAME "radio-mr800" | |
77 | #define amradio_dev_warn(dev, fmt, arg...) \ | |
78 | dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) | |
79 | ||
2aa72f3b AK |
80 | /* Probably USB_TIMEOUT should be modified in module parameter */ |
81 | #define BUFFER_LENGTH 8 | |
82 | #define USB_TIMEOUT 500 | |
83 | ||
84 | /* Frequency limits in MHz -- these are European values. For Japanese | |
85 | devices, that would be 76 and 91. */ | |
86 | #define FREQ_MIN 87.5 | |
87 | #define FREQ_MAX 108.0 | |
88 | #define FREQ_MUL 16000 | |
89 | ||
90 | /* module parameter */ | |
91 | static int radio_nr = -1; | |
92 | module_param(radio_nr, int, 0); | |
93 | MODULE_PARM_DESC(radio_nr, "Radio Nr"); | |
94 | ||
95 | static struct v4l2_queryctrl radio_qctrl[] = { | |
96 | { | |
97 | .id = V4L2_CID_AUDIO_MUTE, | |
98 | .name = "Mute", | |
99 | .minimum = 0, | |
100 | .maximum = 1, | |
101 | .step = 1, | |
102 | .default_value = 1, | |
103 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
104 | }, | |
105 | /* HINT: the disabled controls are only here to satify kradio and such apps */ | |
106 | { .id = V4L2_CID_AUDIO_VOLUME, | |
107 | .flags = V4L2_CTRL_FLAG_DISABLED, | |
108 | }, | |
109 | { | |
110 | .id = V4L2_CID_AUDIO_BALANCE, | |
111 | .flags = V4L2_CTRL_FLAG_DISABLED, | |
112 | }, | |
113 | { | |
114 | .id = V4L2_CID_AUDIO_BASS, | |
115 | .flags = V4L2_CTRL_FLAG_DISABLED, | |
116 | }, | |
117 | { | |
118 | .id = V4L2_CID_AUDIO_TREBLE, | |
119 | .flags = V4L2_CTRL_FLAG_DISABLED, | |
120 | }, | |
121 | { | |
122 | .id = V4L2_CID_AUDIO_LOUDNESS, | |
123 | .flags = V4L2_CTRL_FLAG_DISABLED, | |
124 | }, | |
125 | }; | |
126 | ||
127 | static int usb_amradio_probe(struct usb_interface *intf, | |
128 | const struct usb_device_id *id); | |
129 | static void usb_amradio_disconnect(struct usb_interface *intf); | |
130 | static int usb_amradio_open(struct inode *inode, struct file *file); | |
131 | static int usb_amradio_close(struct inode *inode, struct file *file); | |
132 | static int usb_amradio_suspend(struct usb_interface *intf, | |
133 | pm_message_t message); | |
134 | static int usb_amradio_resume(struct usb_interface *intf); | |
135 | ||
136 | /* Data for one (physical) device */ | |
137 | struct amradio_device { | |
138 | /* reference to USB and video device */ | |
139 | struct usb_device *usbdev; | |
140 | struct video_device *videodev; | |
141 | ||
142 | unsigned char *buffer; | |
143 | struct mutex lock; /* buffer locking */ | |
144 | int curfreq; | |
145 | int stereo; | |
146 | int users; | |
147 | int removed; | |
148 | int muted; | |
149 | }; | |
150 | ||
151 | /* USB Device ID List */ | |
152 | static struct usb_device_id usb_amradio_device_table[] = { | |
153 | {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, | |
154 | USB_CLASS_HID, 0, 0) }, | |
155 | { } /* Terminating entry */ | |
156 | }; | |
157 | ||
158 | MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); | |
159 | ||
160 | /* USB subsystem interface */ | |
161 | static struct usb_driver usb_amradio_driver = { | |
e60b022e | 162 | .name = MR800_DRIVER_NAME, |
2aa72f3b AK |
163 | .probe = usb_amradio_probe, |
164 | .disconnect = usb_amradio_disconnect, | |
165 | .suspend = usb_amradio_suspend, | |
166 | .resume = usb_amradio_resume, | |
167 | .reset_resume = usb_amradio_resume, | |
168 | .id_table = usb_amradio_device_table, | |
f2ce9179 | 169 | .supports_autosuspend = 0, |
2aa72f3b AK |
170 | }; |
171 | ||
172 | /* switch on radio. Send 8 bytes to device. */ | |
173 | static int amradio_start(struct amradio_device *radio) | |
174 | { | |
175 | int retval; | |
176 | int size; | |
177 | ||
178 | mutex_lock(&radio->lock); | |
179 | ||
180 | radio->buffer[0] = 0x00; | |
181 | radio->buffer[1] = 0x55; | |
182 | radio->buffer[2] = 0xaa; | |
183 | radio->buffer[3] = 0x00; | |
184 | radio->buffer[4] = 0xab; | |
185 | radio->buffer[5] = 0x00; | |
186 | radio->buffer[6] = 0x00; | |
187 | radio->buffer[7] = 0x00; | |
188 | ||
189 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
190 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
191 | ||
192 | if (retval) { | |
193 | mutex_unlock(&radio->lock); | |
194 | return retval; | |
195 | } | |
196 | ||
197 | mutex_unlock(&radio->lock); | |
198 | ||
199 | radio->muted = 0; | |
200 | ||
201 | return retval; | |
202 | } | |
203 | ||
204 | /* switch off radio */ | |
205 | static int amradio_stop(struct amradio_device *radio) | |
206 | { | |
207 | int retval; | |
208 | int size; | |
209 | ||
3480130a AK |
210 | /* safety check */ |
211 | if (radio->removed) | |
212 | return -EIO; | |
213 | ||
2aa72f3b AK |
214 | mutex_lock(&radio->lock); |
215 | ||
216 | radio->buffer[0] = 0x00; | |
217 | radio->buffer[1] = 0x55; | |
218 | radio->buffer[2] = 0xaa; | |
219 | radio->buffer[3] = 0x00; | |
220 | radio->buffer[4] = 0xab; | |
221 | radio->buffer[5] = 0x01; | |
222 | radio->buffer[6] = 0x00; | |
223 | radio->buffer[7] = 0x00; | |
224 | ||
225 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
226 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
227 | ||
228 | if (retval) { | |
229 | mutex_unlock(&radio->lock); | |
230 | return retval; | |
231 | } | |
232 | ||
233 | mutex_unlock(&radio->lock); | |
234 | ||
235 | radio->muted = 1; | |
236 | ||
237 | return retval; | |
238 | } | |
239 | ||
240 | /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
241 | static int amradio_setfreq(struct amradio_device *radio, int freq) | |
242 | { | |
243 | int retval; | |
244 | int size; | |
245 | unsigned short freq_send = 0x13 + (freq >> 3) / 25; | |
246 | ||
3480130a AK |
247 | /* safety check */ |
248 | if (radio->removed) | |
249 | return -EIO; | |
250 | ||
2aa72f3b AK |
251 | mutex_lock(&radio->lock); |
252 | ||
253 | radio->buffer[0] = 0x00; | |
254 | radio->buffer[1] = 0x55; | |
255 | radio->buffer[2] = 0xaa; | |
256 | radio->buffer[3] = 0x03; | |
257 | radio->buffer[4] = 0xa4; | |
258 | radio->buffer[5] = 0x00; | |
259 | radio->buffer[6] = 0x00; | |
260 | radio->buffer[7] = 0x08; | |
261 | ||
262 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
263 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
264 | ||
265 | if (retval) { | |
266 | mutex_unlock(&radio->lock); | |
267 | return retval; | |
268 | } | |
269 | ||
270 | /* frequency is calculated from freq_send and placed in first 2 bytes */ | |
271 | radio->buffer[0] = (freq_send >> 8) & 0xff; | |
272 | radio->buffer[1] = freq_send & 0xff; | |
273 | radio->buffer[2] = 0x01; | |
274 | radio->buffer[3] = 0x00; | |
275 | radio->buffer[4] = 0x00; | |
276 | /* 5 and 6 bytes of buffer already = 0x00 */ | |
277 | radio->buffer[7] = 0x00; | |
278 | ||
279 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
280 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
281 | ||
282 | if (retval) { | |
283 | mutex_unlock(&radio->lock); | |
284 | return retval; | |
285 | } | |
286 | ||
287 | mutex_unlock(&radio->lock); | |
288 | ||
289 | radio->stereo = 0; | |
290 | ||
291 | return retval; | |
292 | } | |
293 | ||
294 | /* USB subsystem interface begins here */ | |
295 | ||
296 | /* handle unplugging of the device, release data structures | |
297 | if nothing keeps us from doing it. If something is still | |
298 | keeping us busy, the release callback of v4l will take care | |
299 | of releasing it. */ | |
300 | static void usb_amradio_disconnect(struct usb_interface *intf) | |
301 | { | |
302 | struct amradio_device *radio = usb_get_intfdata(intf); | |
303 | ||
f4e9043e | 304 | mutex_lock(&radio->lock); |
3480130a | 305 | radio->removed = 1; |
f4e9043e | 306 | mutex_unlock(&radio->lock); |
2aa72f3b | 307 | |
f4e9043e AK |
308 | usb_set_intfdata(intf, NULL); |
309 | video_unregister_device(radio->videodev); | |
2aa72f3b AK |
310 | } |
311 | ||
312 | /* vidioc_querycap - query device capabilities */ | |
313 | static int vidioc_querycap(struct file *file, void *priv, | |
314 | struct v4l2_capability *v) | |
315 | { | |
316 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); | |
317 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); | |
318 | sprintf(v->bus_info, "USB"); | |
319 | v->version = RADIO_VERSION; | |
320 | v->capabilities = V4L2_CAP_TUNER; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | /* vidioc_g_tuner - get tuner attributes */ | |
325 | static int vidioc_g_tuner(struct file *file, void *priv, | |
326 | struct v4l2_tuner *v) | |
327 | { | |
328 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
329 | ||
3480130a AK |
330 | /* safety check */ |
331 | if (radio->removed) | |
332 | return -EIO; | |
333 | ||
2aa72f3b AK |
334 | if (v->index > 0) |
335 | return -EINVAL; | |
336 | ||
337 | /* TODO: Add function which look is signal stereo or not | |
338 | * amradio_getstat(radio); | |
339 | */ | |
340 | radio->stereo = -1; | |
341 | strcpy(v->name, "FM"); | |
342 | v->type = V4L2_TUNER_RADIO; | |
343 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
344 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
345 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
346 | v->capability = V4L2_TUNER_CAP_LOW; | |
347 | if (radio->stereo) | |
348 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
349 | else | |
350 | v->audmode = V4L2_TUNER_MODE_MONO; | |
351 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ | |
352 | v->afc = 0; /* Don't know what is this */ | |
353 | return 0; | |
354 | } | |
355 | ||
356 | /* vidioc_s_tuner - set tuner attributes */ | |
357 | static int vidioc_s_tuner(struct file *file, void *priv, | |
358 | struct v4l2_tuner *v) | |
359 | { | |
3480130a AK |
360 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
361 | ||
362 | /* safety check */ | |
363 | if (radio->removed) | |
364 | return -EIO; | |
365 | ||
2aa72f3b AK |
366 | if (v->index > 0) |
367 | return -EINVAL; | |
368 | return 0; | |
369 | } | |
370 | ||
371 | /* vidioc_s_frequency - set tuner radio frequency */ | |
372 | static int vidioc_s_frequency(struct file *file, void *priv, | |
373 | struct v4l2_frequency *f) | |
374 | { | |
375 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
376 | ||
3480130a AK |
377 | /* safety check */ |
378 | if (radio->removed) | |
379 | return -EIO; | |
380 | ||
2aa72f3b AK |
381 | radio->curfreq = f->frequency; |
382 | if (amradio_setfreq(radio, radio->curfreq) < 0) | |
e60b022e AK |
383 | amradio_dev_warn(&radio->videodev->dev, |
384 | "set frequency failed\n"); | |
2aa72f3b AK |
385 | return 0; |
386 | } | |
387 | ||
388 | /* vidioc_g_frequency - get tuner radio frequency */ | |
389 | static int vidioc_g_frequency(struct file *file, void *priv, | |
390 | struct v4l2_frequency *f) | |
391 | { | |
392 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
393 | ||
3480130a AK |
394 | /* safety check */ |
395 | if (radio->removed) | |
396 | return -EIO; | |
397 | ||
2aa72f3b AK |
398 | f->type = V4L2_TUNER_RADIO; |
399 | f->frequency = radio->curfreq; | |
400 | return 0; | |
401 | } | |
402 | ||
403 | /* vidioc_queryctrl - enumerate control items */ | |
404 | static int vidioc_queryctrl(struct file *file, void *priv, | |
405 | struct v4l2_queryctrl *qc) | |
406 | { | |
407 | int i; | |
408 | ||
409 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
410 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
e60b022e | 411 | memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); |
2aa72f3b AK |
412 | return 0; |
413 | } | |
414 | } | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | /* vidioc_g_ctrl - get the value of a control */ | |
419 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
420 | struct v4l2_control *ctrl) | |
421 | { | |
422 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
423 | ||
3480130a AK |
424 | /* safety check */ |
425 | if (radio->removed) | |
426 | return -EIO; | |
427 | ||
2aa72f3b AK |
428 | switch (ctrl->id) { |
429 | case V4L2_CID_AUDIO_MUTE: | |
430 | ctrl->value = radio->muted; | |
431 | return 0; | |
432 | } | |
433 | return -EINVAL; | |
434 | } | |
435 | ||
436 | /* vidioc_s_ctrl - set the value of a control */ | |
437 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
438 | struct v4l2_control *ctrl) | |
439 | { | |
440 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
441 | ||
3480130a AK |
442 | /* safety check */ |
443 | if (radio->removed) | |
444 | return -EIO; | |
445 | ||
2aa72f3b AK |
446 | switch (ctrl->id) { |
447 | case V4L2_CID_AUDIO_MUTE: | |
448 | if (ctrl->value) { | |
449 | if (amradio_stop(radio) < 0) { | |
e60b022e AK |
450 | amradio_dev_warn(&radio->videodev->dev, |
451 | "amradio_stop failed\n"); | |
2aa72f3b AK |
452 | return -1; |
453 | } | |
454 | } else { | |
455 | if (amradio_start(radio) < 0) { | |
e60b022e AK |
456 | amradio_dev_warn(&radio->videodev->dev, |
457 | "amradio_start failed\n"); | |
2aa72f3b AK |
458 | return -1; |
459 | } | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | /* vidioc_g_audio - get audio attributes */ | |
467 | static int vidioc_g_audio(struct file *file, void *priv, | |
468 | struct v4l2_audio *a) | |
469 | { | |
470 | if (a->index > 1) | |
471 | return -EINVAL; | |
472 | ||
473 | strcpy(a->name, "Radio"); | |
474 | a->capability = V4L2_AUDCAP_STEREO; | |
475 | return 0; | |
476 | } | |
477 | ||
478 | /* vidioc_s_audio - set audio attributes */ | |
479 | static int vidioc_s_audio(struct file *file, void *priv, | |
480 | struct v4l2_audio *a) | |
481 | { | |
482 | if (a->index != 0) | |
483 | return -EINVAL; | |
484 | return 0; | |
485 | } | |
486 | ||
487 | /* vidioc_g_input - get input */ | |
488 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
489 | { | |
490 | *i = 0; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | /* vidioc_s_input - set input */ | |
495 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
496 | { | |
497 | if (i != 0) | |
498 | return -EINVAL; | |
499 | return 0; | |
500 | } | |
501 | ||
502 | /* open device - amradio_start() and amradio_setfreq() */ | |
503 | static int usb_amradio_open(struct inode *inode, struct file *file) | |
504 | { | |
505 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
506 | ||
0fabb783 AK |
507 | lock_kernel(); |
508 | ||
2aa72f3b AK |
509 | radio->users = 1; |
510 | radio->muted = 1; | |
511 | ||
512 | if (amradio_start(radio) < 0) { | |
e60b022e AK |
513 | amradio_dev_warn(&radio->videodev->dev, |
514 | "radio did not start up properly\n"); | |
2aa72f3b | 515 | radio->users = 0; |
0fabb783 | 516 | unlock_kernel(); |
2aa72f3b AK |
517 | return -EIO; |
518 | } | |
519 | if (amradio_setfreq(radio, radio->curfreq) < 0) | |
e60b022e AK |
520 | amradio_dev_warn(&radio->videodev->dev, |
521 | "set frequency failed\n"); | |
0fabb783 AK |
522 | |
523 | unlock_kernel(); | |
2aa72f3b AK |
524 | return 0; |
525 | } | |
526 | ||
f4e9043e | 527 | /*close device */ |
2aa72f3b AK |
528 | static int usb_amradio_close(struct inode *inode, struct file *file) |
529 | { | |
530 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
3480130a | 531 | int retval; |
2aa72f3b AK |
532 | |
533 | if (!radio) | |
534 | return -ENODEV; | |
3480130a | 535 | |
2aa72f3b | 536 | radio->users = 0; |
3480130a | 537 | |
f4e9043e | 538 | if (!radio->removed) { |
3480130a AK |
539 | retval = amradio_stop(radio); |
540 | if (retval < 0) | |
541 | amradio_dev_warn(&radio->videodev->dev, | |
542 | "amradio_stop failed\n"); | |
2aa72f3b | 543 | } |
3480130a | 544 | |
2aa72f3b AK |
545 | return 0; |
546 | } | |
547 | ||
548 | /* Suspend device - stop device. Need to be checked and fixed */ | |
549 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) | |
550 | { | |
551 | struct amradio_device *radio = usb_get_intfdata(intf); | |
552 | ||
553 | if (amradio_stop(radio) < 0) | |
e60b022e | 554 | dev_warn(&intf->dev, "amradio_stop failed\n"); |
2aa72f3b | 555 | |
e60b022e | 556 | dev_info(&intf->dev, "going into suspend..\n"); |
2aa72f3b AK |
557 | |
558 | return 0; | |
559 | } | |
560 | ||
561 | /* Resume device - start device. Need to be checked and fixed */ | |
562 | static int usb_amradio_resume(struct usb_interface *intf) | |
563 | { | |
564 | struct amradio_device *radio = usb_get_intfdata(intf); | |
565 | ||
566 | if (amradio_start(radio) < 0) | |
e60b022e | 567 | dev_warn(&intf->dev, "amradio_start failed\n"); |
2aa72f3b | 568 | |
e60b022e | 569 | dev_info(&intf->dev, "coming out of suspend..\n"); |
2aa72f3b AK |
570 | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* File system interface */ | |
575 | static const struct file_operations usb_amradio_fops = { | |
576 | .owner = THIS_MODULE, | |
577 | .open = usb_amradio_open, | |
578 | .release = usb_amradio_close, | |
579 | .ioctl = video_ioctl2, | |
580 | #ifdef CONFIG_COMPAT | |
581 | .compat_ioctl = v4l_compat_ioctl32, | |
582 | #endif | |
583 | .llseek = no_llseek, | |
584 | }; | |
585 | ||
586 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { | |
587 | .vidioc_querycap = vidioc_querycap, | |
588 | .vidioc_g_tuner = vidioc_g_tuner, | |
589 | .vidioc_s_tuner = vidioc_s_tuner, | |
590 | .vidioc_g_frequency = vidioc_g_frequency, | |
591 | .vidioc_s_frequency = vidioc_s_frequency, | |
592 | .vidioc_queryctrl = vidioc_queryctrl, | |
593 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
594 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
595 | .vidioc_g_audio = vidioc_g_audio, | |
596 | .vidioc_s_audio = vidioc_s_audio, | |
597 | .vidioc_g_input = vidioc_g_input, | |
598 | .vidioc_s_input = vidioc_s_input, | |
599 | }; | |
600 | ||
f4e9043e AK |
601 | static void usb_amradio_device_release(struct video_device *videodev) |
602 | { | |
603 | struct amradio_device *radio = video_get_drvdata(videodev); | |
604 | ||
605 | /* we call v4l to free radio->videodev */ | |
606 | video_device_release(videodev); | |
607 | ||
608 | /* free rest memory */ | |
609 | kfree(radio->buffer); | |
610 | kfree(radio); | |
611 | } | |
612 | ||
2aa72f3b AK |
613 | /* V4L2 interface */ |
614 | static struct video_device amradio_videodev_template = { | |
615 | .name = "AverMedia MR 800 USB FM Radio", | |
616 | .fops = &usb_amradio_fops, | |
617 | .ioctl_ops = &usb_amradio_ioctl_ops, | |
f4e9043e | 618 | .release = usb_amradio_device_release, |
2aa72f3b AK |
619 | }; |
620 | ||
621 | /* check if the device is present and register with v4l and | |
622 | usb if it is */ | |
623 | static int usb_amradio_probe(struct usb_interface *intf, | |
624 | const struct usb_device_id *id) | |
625 | { | |
626 | struct amradio_device *radio; | |
627 | ||
628 | radio = kmalloc(sizeof(struct amradio_device), GFP_KERNEL); | |
629 | ||
630 | if (!(radio)) | |
631 | return -ENOMEM; | |
632 | ||
633 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); | |
634 | ||
635 | if (!(radio->buffer)) { | |
636 | kfree(radio); | |
637 | return -ENOMEM; | |
638 | } | |
639 | ||
640 | radio->videodev = video_device_alloc(); | |
641 | ||
642 | if (!(radio->videodev)) { | |
643 | kfree(radio->buffer); | |
644 | kfree(radio); | |
645 | return -ENOMEM; | |
646 | } | |
647 | ||
648 | memcpy(radio->videodev, &amradio_videodev_template, | |
649 | sizeof(amradio_videodev_template)); | |
650 | ||
651 | radio->removed = 0; | |
652 | radio->users = 0; | |
653 | radio->usbdev = interface_to_usbdev(intf); | |
654 | radio->curfreq = 95.16 * FREQ_MUL; | |
655 | ||
656 | mutex_init(&radio->lock); | |
657 | ||
658 | video_set_drvdata(radio->videodev, radio); | |
659 | if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) { | |
e60b022e | 660 | dev_warn(&intf->dev, "could not register video device\n"); |
2aa72f3b AK |
661 | video_device_release(radio->videodev); |
662 | kfree(radio->buffer); | |
663 | kfree(radio); | |
664 | return -EIO; | |
665 | } | |
666 | ||
667 | usb_set_intfdata(intf, radio); | |
668 | return 0; | |
669 | } | |
670 | ||
671 | static int __init amradio_init(void) | |
672 | { | |
673 | int retval = usb_register(&usb_amradio_driver); | |
674 | ||
e60b022e AK |
675 | pr_info(KBUILD_MODNAME |
676 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); | |
677 | ||
2aa72f3b | 678 | if (retval) |
e60b022e AK |
679 | pr_err(KBUILD_MODNAME |
680 | ": usb_register failed. Error number %d\n", retval); | |
681 | ||
2aa72f3b AK |
682 | return retval; |
683 | } | |
684 | ||
685 | static void __exit amradio_exit(void) | |
686 | { | |
687 | usb_deregister(&usb_amradio_driver); | |
688 | } | |
689 | ||
690 | module_init(amradio_init); | |
691 | module_exit(amradio_exit); | |
692 |