Commit | Line | Data |
---|---|---|
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 | /* | |
71f07d94 | 25 | * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c |
2aa72f3b AK |
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). | |
71f07d94 AK |
33 | * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio |
34 | * in 2007. He allowed to use his driver to improve current mr800 radio driver. | |
35 | * http://kerneltrap.org/mailarchive/linux-usb-devel/2007/10/11/342492 | |
2aa72f3b | 36 | * |
2aa72f3b AK |
37 | * Version 0.01: First working version. |
38 | * It's required to blacklist AverMedia USB Radio | |
39 | * in usbhid/hid-quirks.c | |
71f07d94 AK |
40 | * Version 0.10: A lot of cleanups and fixes: unpluging the device, |
41 | * few mutex locks were added, codinstyle issues, etc. | |
42 | * Added stereo support. Thanks to | |
43 | * Douglas Schilling Landgraf <dougsland@gmail.com> and | |
44 | * David Ellingsworth <david@identd.dyndns.org> | |
45 | * for discussion, help and support. | |
b466248d | 46 | * Version 0.11: Converted to v4l2_device. |
2aa72f3b AK |
47 | * |
48 | * Many things to do: | |
3dbda77e | 49 | * - Correct power management of device (suspend & resume) |
2aa72f3b | 50 | * - Add code for scanning and smooth tuning |
2aa72f3b AK |
51 | * - Add code for sensitivity value |
52 | * - Correct mistakes | |
53 | * - In Japan another FREQ_MIN and FREQ_MAX | |
54 | */ | |
55 | ||
56 | /* kernel includes */ | |
57 | #include <linux/kernel.h> | |
58 | #include <linux/module.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/slab.h> | |
405f5571 | 61 | #include <linux/smp_lock.h> |
2aa72f3b AK |
62 | #include <linux/input.h> |
63 | #include <linux/videodev2.h> | |
b466248d | 64 | #include <media/v4l2-device.h> |
2aa72f3b AK |
65 | #include <media/v4l2-ioctl.h> |
66 | #include <linux/usb.h> | |
67 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
24c44d85 | 68 | #include <linux/mutex.h> |
2aa72f3b AK |
69 | |
70 | /* driver and module definitions */ | |
71 | #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" | |
72 | #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" | |
b466248d AK |
73 | #define DRIVER_VERSION "0.11" |
74 | #define RADIO_VERSION KERNEL_VERSION(0, 1, 1) | |
2aa72f3b AK |
75 | |
76 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
77 | MODULE_DESCRIPTION(DRIVER_DESC); | |
78 | MODULE_LICENSE("GPL"); | |
79 | ||
80 | #define USB_AMRADIO_VENDOR 0x07ca | |
81 | #define USB_AMRADIO_PRODUCT 0xb800 | |
82 | ||
e60b022e AK |
83 | /* dev_warn macro with driver name */ |
84 | #define MR800_DRIVER_NAME "radio-mr800" | |
85 | #define amradio_dev_warn(dev, fmt, arg...) \ | |
86 | dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) | |
87 | ||
2aa72f3b AK |
88 | /* Probably USB_TIMEOUT should be modified in module parameter */ |
89 | #define BUFFER_LENGTH 8 | |
90 | #define USB_TIMEOUT 500 | |
91 | ||
92 | /* Frequency limits in MHz -- these are European values. For Japanese | |
93 | devices, that would be 76 and 91. */ | |
94 | #define FREQ_MIN 87.5 | |
95 | #define FREQ_MAX 108.0 | |
96 | #define FREQ_MUL 16000 | |
97 | ||
db821804 AK |
98 | /* |
99 | * Commands that device should understand | |
100 | * List isnt full and will be updated with implementation of new functions | |
101 | */ | |
f7c1a380 | 102 | #define AMRADIO_SET_FREQ 0xa4 |
db821804 | 103 | #define AMRADIO_SET_MUTE 0xab |
1bb16d71 | 104 | #define AMRADIO_SET_MONO 0xae |
db821804 AK |
105 | |
106 | /* Comfortable defines for amradio_set_mute */ | |
107 | #define AMRADIO_START 0x00 | |
108 | #define AMRADIO_STOP 0x01 | |
109 | ||
1bb16d71 AK |
110 | /* Comfortable defines for amradio_set_stereo */ |
111 | #define WANT_STEREO 0x00 | |
112 | #define WANT_MONO 0x01 | |
113 | ||
2aa72f3b AK |
114 | /* module parameter */ |
115 | static int radio_nr = -1; | |
116 | module_param(radio_nr, int, 0); | |
117 | MODULE_PARM_DESC(radio_nr, "Radio Nr"); | |
118 | ||
2aa72f3b AK |
119 | static int usb_amradio_probe(struct usb_interface *intf, |
120 | const struct usb_device_id *id); | |
121 | static void usb_amradio_disconnect(struct usb_interface *intf); | |
bec43661 HV |
122 | static int usb_amradio_open(struct file *file); |
123 | static int usb_amradio_close(struct file *file); | |
2aa72f3b AK |
124 | static int usb_amradio_suspend(struct usb_interface *intf, |
125 | pm_message_t message); | |
126 | static int usb_amradio_resume(struct usb_interface *intf); | |
127 | ||
128 | /* Data for one (physical) device */ | |
129 | struct amradio_device { | |
130 | /* reference to USB and video device */ | |
131 | struct usb_device *usbdev; | |
7a7d92e0 | 132 | struct video_device videodev; |
b466248d | 133 | struct v4l2_device v4l2_dev; |
2aa72f3b AK |
134 | |
135 | unsigned char *buffer; | |
136 | struct mutex lock; /* buffer locking */ | |
137 | int curfreq; | |
138 | int stereo; | |
139 | int users; | |
140 | int removed; | |
141 | int muted; | |
142 | }; | |
143 | ||
144 | /* USB Device ID List */ | |
145 | static struct usb_device_id usb_amradio_device_table[] = { | |
146 | {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, | |
147 | USB_CLASS_HID, 0, 0) }, | |
148 | { } /* Terminating entry */ | |
149 | }; | |
150 | ||
151 | MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); | |
152 | ||
153 | /* USB subsystem interface */ | |
154 | static struct usb_driver usb_amradio_driver = { | |
e60b022e | 155 | .name = MR800_DRIVER_NAME, |
2aa72f3b AK |
156 | .probe = usb_amradio_probe, |
157 | .disconnect = usb_amradio_disconnect, | |
158 | .suspend = usb_amradio_suspend, | |
159 | .resume = usb_amradio_resume, | |
160 | .reset_resume = usb_amradio_resume, | |
161 | .id_table = usb_amradio_device_table, | |
f2ce9179 | 162 | .supports_autosuspend = 0, |
2aa72f3b AK |
163 | }; |
164 | ||
db821804 AK |
165 | /* switch on/off the radio. Send 8 bytes to device */ |
166 | static int amradio_set_mute(struct amradio_device *radio, char argument) | |
2aa72f3b AK |
167 | { |
168 | int retval; | |
169 | int size; | |
170 | ||
4aebc289 | 171 | BUG_ON(!mutex_is_locked(&radio->lock)); |
2aa72f3b AK |
172 | |
173 | radio->buffer[0] = 0x00; | |
174 | radio->buffer[1] = 0x55; | |
175 | radio->buffer[2] = 0xaa; | |
176 | radio->buffer[3] = 0x00; | |
db821804 AK |
177 | radio->buffer[4] = AMRADIO_SET_MUTE; |
178 | radio->buffer[5] = argument; | |
2aa72f3b AK |
179 | radio->buffer[6] = 0x00; |
180 | radio->buffer[7] = 0x00; | |
181 | ||
182 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
183 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
184 | ||
4aebc289 | 185 | if (retval < 0 || size != BUFFER_LENGTH) |
2aa72f3b | 186 | return retval; |
2aa72f3b | 187 | |
db821804 | 188 | radio->muted = argument; |
2aa72f3b AK |
189 | |
190 | return retval; | |
191 | } | |
192 | ||
193 | /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
194 | static int amradio_setfreq(struct amradio_device *radio, int freq) | |
195 | { | |
196 | int retval; | |
197 | int size; | |
f7c1a380 | 198 | unsigned short freq_send = 0x10 + (freq >> 3) / 25; |
2aa72f3b | 199 | |
4aebc289 | 200 | BUG_ON(!mutex_is_locked(&radio->lock)); |
2aa72f3b AK |
201 | |
202 | radio->buffer[0] = 0x00; | |
203 | radio->buffer[1] = 0x55; | |
204 | radio->buffer[2] = 0xaa; | |
205 | radio->buffer[3] = 0x03; | |
f7c1a380 | 206 | radio->buffer[4] = AMRADIO_SET_FREQ; |
2aa72f3b AK |
207 | radio->buffer[5] = 0x00; |
208 | radio->buffer[6] = 0x00; | |
209 | radio->buffer[7] = 0x08; | |
210 | ||
211 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
212 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
213 | ||
4aebc289 | 214 | if (retval < 0 || size != BUFFER_LENGTH) |
2aa72f3b | 215 | return retval; |
2aa72f3b AK |
216 | |
217 | /* frequency is calculated from freq_send and placed in first 2 bytes */ | |
218 | radio->buffer[0] = (freq_send >> 8) & 0xff; | |
219 | radio->buffer[1] = freq_send & 0xff; | |
220 | radio->buffer[2] = 0x01; | |
221 | radio->buffer[3] = 0x00; | |
222 | radio->buffer[4] = 0x00; | |
223 | /* 5 and 6 bytes of buffer already = 0x00 */ | |
224 | radio->buffer[7] = 0x00; | |
225 | ||
226 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
227 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
228 | ||
1bb16d71 AK |
229 | return retval; |
230 | } | |
231 | ||
232 | static int amradio_set_stereo(struct amradio_device *radio, char argument) | |
233 | { | |
234 | int retval; | |
235 | int size; | |
236 | ||
4aebc289 | 237 | BUG_ON(!mutex_is_locked(&radio->lock)); |
1bb16d71 AK |
238 | |
239 | radio->buffer[0] = 0x00; | |
240 | radio->buffer[1] = 0x55; | |
241 | radio->buffer[2] = 0xaa; | |
242 | radio->buffer[3] = 0x00; | |
243 | radio->buffer[4] = AMRADIO_SET_MONO; | |
244 | radio->buffer[5] = argument; | |
245 | radio->buffer[6] = 0x00; | |
246 | radio->buffer[7] = 0x00; | |
247 | ||
248 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
249 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
250 | ||
251 | if (retval < 0 || size != BUFFER_LENGTH) { | |
252 | radio->stereo = -1; | |
1bb16d71 AK |
253 | return retval; |
254 | } | |
255 | ||
256 | radio->stereo = 1; | |
2aa72f3b AK |
257 | |
258 | return retval; | |
259 | } | |
260 | ||
71f07d94 AK |
261 | /* Handle unplugging the device. |
262 | * We call video_unregister_device in any case. | |
263 | * The last function called in this procedure is | |
264 | * usb_amradio_device_release. | |
265 | */ | |
2aa72f3b AK |
266 | static void usb_amradio_disconnect(struct usb_interface *intf) |
267 | { | |
268 | struct amradio_device *radio = usb_get_intfdata(intf); | |
269 | ||
f4e9043e | 270 | mutex_lock(&radio->lock); |
3480130a | 271 | radio->removed = 1; |
f4e9043e | 272 | mutex_unlock(&radio->lock); |
2aa72f3b | 273 | |
f4e9043e | 274 | usb_set_intfdata(intf, NULL); |
7a7d92e0 | 275 | video_unregister_device(&radio->videodev); |
b466248d | 276 | v4l2_device_disconnect(&radio->v4l2_dev); |
2aa72f3b AK |
277 | } |
278 | ||
279 | /* vidioc_querycap - query device capabilities */ | |
280 | static int vidioc_querycap(struct file *file, void *priv, | |
281 | struct v4l2_capability *v) | |
282 | { | |
c7181cfa AK |
283 | struct amradio_device *radio = video_drvdata(file); |
284 | ||
2aa72f3b AK |
285 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); |
286 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); | |
c7181cfa | 287 | usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); |
2aa72f3b AK |
288 | v->version = RADIO_VERSION; |
289 | v->capabilities = V4L2_CAP_TUNER; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | /* vidioc_g_tuner - get tuner attributes */ | |
294 | static int vidioc_g_tuner(struct file *file, void *priv, | |
295 | struct v4l2_tuner *v) | |
296 | { | |
297 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
1bb16d71 | 298 | int retval; |
2aa72f3b | 299 | |
4aebc289 DE |
300 | mutex_lock(&radio->lock); |
301 | ||
3480130a | 302 | /* safety check */ |
4aebc289 DE |
303 | if (radio->removed) { |
304 | retval = -EIO; | |
305 | goto unlock; | |
306 | } | |
3480130a | 307 | |
4aebc289 DE |
308 | if (v->index > 0) { |
309 | retval = -EINVAL; | |
310 | goto unlock; | |
311 | } | |
2aa72f3b AK |
312 | |
313 | /* TODO: Add function which look is signal stereo or not | |
314 | * amradio_getstat(radio); | |
315 | */ | |
1bb16d71 AK |
316 | |
317 | /* we call amradio_set_stereo to set radio->stereo | |
318 | * Honestly, amradio_getstat should cover this in future and | |
319 | * amradio_set_stereo shouldn't be here | |
320 | */ | |
321 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
322 | if (retval < 0) | |
7a7d92e0 | 323 | amradio_dev_warn(&radio->videodev.dev, |
1bb16d71 AK |
324 | "set stereo failed\n"); |
325 | ||
2aa72f3b AK |
326 | strcpy(v->name, "FM"); |
327 | v->type = V4L2_TUNER_RADIO; | |
328 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
329 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
330 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
331 | v->capability = V4L2_TUNER_CAP_LOW; | |
332 | if (radio->stereo) | |
333 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
334 | else | |
335 | v->audmode = V4L2_TUNER_MODE_MONO; | |
336 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ | |
337 | v->afc = 0; /* Don't know what is this */ | |
4aebc289 DE |
338 | |
339 | unlock: | |
340 | mutex_unlock(&radio->lock); | |
341 | return retval; | |
2aa72f3b AK |
342 | } |
343 | ||
344 | /* vidioc_s_tuner - set tuner attributes */ | |
345 | static int vidioc_s_tuner(struct file *file, void *priv, | |
346 | struct v4l2_tuner *v) | |
347 | { | |
3480130a | 348 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
1bb16d71 | 349 | int retval; |
3480130a | 350 | |
4aebc289 DE |
351 | mutex_lock(&radio->lock); |
352 | ||
3480130a | 353 | /* safety check */ |
4aebc289 DE |
354 | if (radio->removed) { |
355 | retval = -EIO; | |
356 | goto unlock; | |
357 | } | |
3480130a | 358 | |
4aebc289 DE |
359 | if (v->index > 0) { |
360 | retval = -EINVAL; | |
361 | goto unlock; | |
362 | } | |
1bb16d71 AK |
363 | |
364 | /* mono/stereo selector */ | |
365 | switch (v->audmode) { | |
366 | case V4L2_TUNER_MODE_MONO: | |
367 | retval = amradio_set_stereo(radio, WANT_MONO); | |
368 | if (retval < 0) | |
7a7d92e0 | 369 | amradio_dev_warn(&radio->videodev.dev, |
1bb16d71 AK |
370 | "set mono failed\n"); |
371 | break; | |
372 | case V4L2_TUNER_MODE_STEREO: | |
373 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
374 | if (retval < 0) | |
7a7d92e0 | 375 | amradio_dev_warn(&radio->videodev.dev, |
1bb16d71 AK |
376 | "set stereo failed\n"); |
377 | break; | |
378 | default: | |
4aebc289 | 379 | retval = -EINVAL; |
1bb16d71 AK |
380 | } |
381 | ||
4aebc289 DE |
382 | unlock: |
383 | mutex_unlock(&radio->lock); | |
384 | return retval; | |
2aa72f3b AK |
385 | } |
386 | ||
387 | /* vidioc_s_frequency - set tuner radio frequency */ | |
388 | static int vidioc_s_frequency(struct file *file, void *priv, | |
389 | struct v4l2_frequency *f) | |
390 | { | |
391 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 392 | int retval; |
2aa72f3b | 393 | |
4aebc289 DE |
394 | mutex_lock(&radio->lock); |
395 | ||
3480130a | 396 | /* safety check */ |
4aebc289 DE |
397 | if (radio->removed) { |
398 | retval = -EIO; | |
399 | goto unlock; | |
400 | } | |
3480130a | 401 | |
2aa72f3b | 402 | radio->curfreq = f->frequency; |
52433bbb | 403 | |
a5d69475 AK |
404 | retval = amradio_setfreq(radio, radio->curfreq); |
405 | if (retval < 0) | |
7a7d92e0 | 406 | amradio_dev_warn(&radio->videodev.dev, |
e60b022e | 407 | "set frequency failed\n"); |
4aebc289 DE |
408 | |
409 | unlock: | |
410 | mutex_unlock(&radio->lock); | |
411 | return retval; | |
2aa72f3b AK |
412 | } |
413 | ||
414 | /* vidioc_g_frequency - get tuner radio frequency */ | |
415 | static int vidioc_g_frequency(struct file *file, void *priv, | |
416 | struct v4l2_frequency *f) | |
417 | { | |
418 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
4aebc289 DE |
419 | int retval = 0; |
420 | ||
421 | mutex_lock(&radio->lock); | |
2aa72f3b | 422 | |
3480130a | 423 | /* safety check */ |
4aebc289 DE |
424 | if (radio->removed) { |
425 | retval = -EIO; | |
426 | goto unlock; | |
427 | } | |
3480130a | 428 | |
2aa72f3b AK |
429 | f->type = V4L2_TUNER_RADIO; |
430 | f->frequency = radio->curfreq; | |
4aebc289 DE |
431 | |
432 | unlock: | |
433 | mutex_unlock(&radio->lock); | |
434 | return retval; | |
2aa72f3b AK |
435 | } |
436 | ||
437 | /* vidioc_queryctrl - enumerate control items */ | |
438 | static int vidioc_queryctrl(struct file *file, void *priv, | |
439 | struct v4l2_queryctrl *qc) | |
440 | { | |
b466248d AK |
441 | switch (qc->id) { |
442 | case V4L2_CID_AUDIO_MUTE: | |
443 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
2aa72f3b | 444 | } |
b466248d | 445 | |
2aa72f3b AK |
446 | return -EINVAL; |
447 | } | |
448 | ||
449 | /* vidioc_g_ctrl - get the value of a control */ | |
450 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
451 | struct v4l2_control *ctrl) | |
452 | { | |
453 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
4aebc289 DE |
454 | int retval = -EINVAL; |
455 | ||
456 | mutex_lock(&radio->lock); | |
2aa72f3b | 457 | |
3480130a | 458 | /* safety check */ |
4aebc289 DE |
459 | if (radio->removed) { |
460 | retval = -EIO; | |
461 | goto unlock; | |
462 | } | |
3480130a | 463 | |
2aa72f3b AK |
464 | switch (ctrl->id) { |
465 | case V4L2_CID_AUDIO_MUTE: | |
466 | ctrl->value = radio->muted; | |
4aebc289 DE |
467 | retval = 0; |
468 | break; | |
2aa72f3b | 469 | } |
4aebc289 DE |
470 | |
471 | unlock: | |
472 | mutex_unlock(&radio->lock); | |
473 | return retval; | |
2aa72f3b AK |
474 | } |
475 | ||
476 | /* vidioc_s_ctrl - set the value of a control */ | |
477 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
478 | struct v4l2_control *ctrl) | |
479 | { | |
480 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
4aebc289 DE |
481 | int retval = -EINVAL; |
482 | ||
483 | mutex_lock(&radio->lock); | |
2aa72f3b | 484 | |
3480130a | 485 | /* safety check */ |
4aebc289 DE |
486 | if (radio->removed) { |
487 | retval = -EIO; | |
488 | goto unlock; | |
489 | } | |
3480130a | 490 | |
2aa72f3b AK |
491 | switch (ctrl->id) { |
492 | case V4L2_CID_AUDIO_MUTE: | |
493 | if (ctrl->value) { | |
db821804 | 494 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 495 | if (retval < 0) { |
7a7d92e0 | 496 | amradio_dev_warn(&radio->videodev.dev, |
e60b022e | 497 | "amradio_stop failed\n"); |
2aa72f3b AK |
498 | } |
499 | } else { | |
db821804 | 500 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 501 | if (retval < 0) { |
7a7d92e0 | 502 | amradio_dev_warn(&radio->videodev.dev, |
e60b022e | 503 | "amradio_start failed\n"); |
2aa72f3b AK |
504 | } |
505 | } | |
4aebc289 | 506 | break; |
2aa72f3b | 507 | } |
4aebc289 DE |
508 | |
509 | unlock: | |
510 | mutex_unlock(&radio->lock); | |
511 | return retval; | |
2aa72f3b AK |
512 | } |
513 | ||
514 | /* vidioc_g_audio - get audio attributes */ | |
515 | static int vidioc_g_audio(struct file *file, void *priv, | |
516 | struct v4l2_audio *a) | |
517 | { | |
518 | if (a->index > 1) | |
519 | return -EINVAL; | |
520 | ||
521 | strcpy(a->name, "Radio"); | |
522 | a->capability = V4L2_AUDCAP_STEREO; | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* vidioc_s_audio - set audio attributes */ | |
527 | static int vidioc_s_audio(struct file *file, void *priv, | |
528 | struct v4l2_audio *a) | |
529 | { | |
530 | if (a->index != 0) | |
531 | return -EINVAL; | |
532 | return 0; | |
533 | } | |
534 | ||
535 | /* vidioc_g_input - get input */ | |
536 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
537 | { | |
538 | *i = 0; | |
539 | return 0; | |
540 | } | |
541 | ||
542 | /* vidioc_s_input - set input */ | |
543 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
544 | { | |
545 | if (i != 0) | |
546 | return -EINVAL; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | /* open device - amradio_start() and amradio_setfreq() */ | |
bec43661 | 551 | static int usb_amradio_open(struct file *file) |
2aa72f3b AK |
552 | { |
553 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
4aebc289 | 554 | int retval = 0; |
2aa72f3b | 555 | |
4aebc289 DE |
556 | mutex_lock(&radio->lock); |
557 | ||
558 | if (radio->removed) { | |
559 | retval = -EIO; | |
560 | goto unlock; | |
561 | } | |
0fabb783 | 562 | |
2aa72f3b AK |
563 | radio->users = 1; |
564 | radio->muted = 1; | |
565 | ||
db821804 | 566 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 567 | if (retval < 0) { |
7a7d92e0 | 568 | amradio_dev_warn(&radio->videodev.dev, |
e60b022e | 569 | "radio did not start up properly\n"); |
2aa72f3b | 570 | radio->users = 0; |
4aebc289 | 571 | goto unlock; |
2aa72f3b | 572 | } |
a5d69475 | 573 | |
1bb16d71 AK |
574 | retval = amradio_set_stereo(radio, WANT_STEREO); |
575 | if (retval < 0) | |
7a7d92e0 | 576 | amradio_dev_warn(&radio->videodev.dev, |
1bb16d71 AK |
577 | "set stereo failed\n"); |
578 | ||
a5d69475 AK |
579 | retval = amradio_setfreq(radio, radio->curfreq); |
580 | if (retval < 0) | |
7a7d92e0 | 581 | amradio_dev_warn(&radio->videodev.dev, |
e60b022e | 582 | "set frequency failed\n"); |
0fabb783 | 583 | |
4aebc289 DE |
584 | unlock: |
585 | mutex_unlock(&radio->lock); | |
586 | return retval; | |
2aa72f3b AK |
587 | } |
588 | ||
f4e9043e | 589 | /*close device */ |
bec43661 | 590 | static int usb_amradio_close(struct file *file) |
2aa72f3b AK |
591 | { |
592 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
4aebc289 | 593 | int retval = 0; |
3480130a | 594 | |
52433bbb | 595 | mutex_lock(&radio->lock); |
4aebc289 DE |
596 | |
597 | if (radio->removed) { | |
598 | retval = -EIO; | |
599 | goto unlock; | |
600 | } | |
601 | ||
2aa72f3b | 602 | radio->users = 0; |
3480130a | 603 | |
f4e9043e | 604 | if (!radio->removed) { |
db821804 | 605 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
3480130a | 606 | if (retval < 0) |
7a7d92e0 | 607 | amradio_dev_warn(&radio->videodev.dev, |
3480130a | 608 | "amradio_stop failed\n"); |
2aa72f3b | 609 | } |
3480130a | 610 | |
4aebc289 DE |
611 | unlock: |
612 | mutex_unlock(&radio->lock); | |
613 | return retval; | |
2aa72f3b AK |
614 | } |
615 | ||
616 | /* Suspend device - stop device. Need to be checked and fixed */ | |
617 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) | |
618 | { | |
619 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 620 | int retval; |
2aa72f3b | 621 | |
4aebc289 DE |
622 | mutex_lock(&radio->lock); |
623 | ||
db821804 | 624 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 625 | if (retval < 0) |
e60b022e | 626 | dev_warn(&intf->dev, "amradio_stop failed\n"); |
2aa72f3b | 627 | |
e60b022e | 628 | dev_info(&intf->dev, "going into suspend..\n"); |
2aa72f3b | 629 | |
4aebc289 | 630 | mutex_unlock(&radio->lock); |
2aa72f3b AK |
631 | return 0; |
632 | } | |
633 | ||
634 | /* Resume device - start device. Need to be checked and fixed */ | |
635 | static int usb_amradio_resume(struct usb_interface *intf) | |
636 | { | |
637 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 638 | int retval; |
2aa72f3b | 639 | |
4aebc289 DE |
640 | mutex_lock(&radio->lock); |
641 | ||
db821804 | 642 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 643 | if (retval < 0) |
e60b022e | 644 | dev_warn(&intf->dev, "amradio_start failed\n"); |
2aa72f3b | 645 | |
e60b022e | 646 | dev_info(&intf->dev, "coming out of suspend..\n"); |
2aa72f3b | 647 | |
4aebc289 | 648 | mutex_unlock(&radio->lock); |
2aa72f3b AK |
649 | return 0; |
650 | } | |
651 | ||
652 | /* File system interface */ | |
bec43661 | 653 | static const struct v4l2_file_operations usb_amradio_fops = { |
2aa72f3b AK |
654 | .owner = THIS_MODULE, |
655 | .open = usb_amradio_open, | |
656 | .release = usb_amradio_close, | |
657 | .ioctl = video_ioctl2, | |
2aa72f3b AK |
658 | }; |
659 | ||
660 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { | |
661 | .vidioc_querycap = vidioc_querycap, | |
662 | .vidioc_g_tuner = vidioc_g_tuner, | |
663 | .vidioc_s_tuner = vidioc_s_tuner, | |
664 | .vidioc_g_frequency = vidioc_g_frequency, | |
665 | .vidioc_s_frequency = vidioc_s_frequency, | |
666 | .vidioc_queryctrl = vidioc_queryctrl, | |
667 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
668 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
669 | .vidioc_g_audio = vidioc_g_audio, | |
670 | .vidioc_s_audio = vidioc_s_audio, | |
671 | .vidioc_g_input = vidioc_g_input, | |
672 | .vidioc_s_input = vidioc_s_input, | |
673 | }; | |
674 | ||
b466248d | 675 | static void usb_amradio_video_device_release(struct video_device *videodev) |
f4e9043e AK |
676 | { |
677 | struct amradio_device *radio = video_get_drvdata(videodev); | |
678 | ||
b466248d AK |
679 | v4l2_device_unregister(&radio->v4l2_dev); |
680 | ||
f4e9043e AK |
681 | /* free rest memory */ |
682 | kfree(radio->buffer); | |
683 | kfree(radio); | |
684 | } | |
685 | ||
a5d69475 | 686 | /* check if the device is present and register with v4l and usb if it is */ |
2aa72f3b AK |
687 | static int usb_amradio_probe(struct usb_interface *intf, |
688 | const struct usb_device_id *id) | |
689 | { | |
690 | struct amradio_device *radio; | |
b466248d | 691 | struct v4l2_device *v4l2_dev; |
a5d69475 | 692 | int retval; |
2aa72f3b | 693 | |
b466248d | 694 | radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); |
2aa72f3b | 695 | |
8edafcc6 AK |
696 | if (!radio) { |
697 | dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); | |
2aa72f3b | 698 | return -ENOMEM; |
8edafcc6 | 699 | } |
2aa72f3b AK |
700 | |
701 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); | |
702 | ||
8edafcc6 AK |
703 | if (!radio->buffer) { |
704 | dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); | |
2aa72f3b AK |
705 | kfree(radio); |
706 | return -ENOMEM; | |
707 | } | |
708 | ||
b466248d AK |
709 | v4l2_dev = &radio->v4l2_dev; |
710 | retval = v4l2_device_register(&intf->dev, v4l2_dev); | |
711 | if (retval < 0) { | |
712 | dev_err(&intf->dev, "couldn't register v4l2_device\n"); | |
713 | kfree(radio->buffer); | |
714 | kfree(radio); | |
715 | return retval; | |
716 | } | |
717 | ||
7a7d92e0 DE |
718 | strlcpy(radio->videodev.name, v4l2_dev->name, |
719 | sizeof(radio->videodev.name)); | |
720 | radio->videodev.v4l2_dev = v4l2_dev; | |
721 | radio->videodev.fops = &usb_amradio_fops; | |
722 | radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops; | |
723 | radio->videodev.release = usb_amradio_video_device_release; | |
2aa72f3b AK |
724 | |
725 | radio->removed = 0; | |
726 | radio->users = 0; | |
727 | radio->usbdev = interface_to_usbdev(intf); | |
728 | radio->curfreq = 95.16 * FREQ_MUL; | |
1bb16d71 | 729 | radio->stereo = -1; |
2aa72f3b AK |
730 | |
731 | mutex_init(&radio->lock); | |
732 | ||
7a7d92e0 | 733 | video_set_drvdata(&radio->videodev, radio); |
b466248d | 734 | |
7a7d92e0 DE |
735 | retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, |
736 | radio_nr); | |
a5d69475 | 737 | if (retval < 0) { |
65c51dc9 | 738 | dev_err(&intf->dev, "could not register video device\n"); |
b466248d | 739 | v4l2_device_unregister(v4l2_dev); |
2aa72f3b AK |
740 | kfree(radio->buffer); |
741 | kfree(radio); | |
742 | return -EIO; | |
743 | } | |
744 | ||
745 | usb_set_intfdata(intf, radio); | |
746 | return 0; | |
747 | } | |
748 | ||
749 | static int __init amradio_init(void) | |
750 | { | |
751 | int retval = usb_register(&usb_amradio_driver); | |
752 | ||
e60b022e AK |
753 | pr_info(KBUILD_MODNAME |
754 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); | |
755 | ||
2aa72f3b | 756 | if (retval) |
e60b022e AK |
757 | pr_err(KBUILD_MODNAME |
758 | ": usb_register failed. Error number %d\n", retval); | |
759 | ||
2aa72f3b AK |
760 | return retval; |
761 | } | |
762 | ||
763 | static void __exit amradio_exit(void) | |
764 | { | |
765 | usb_deregister(&usb_amradio_driver); | |
766 | } | |
767 | ||
768 | module_init(amradio_init); | |
769 | module_exit(amradio_exit); | |
770 |