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. | |
af901ca1 | 31 | * Probably, this driver could be improved through using their |
2aa72f3b | 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; | |
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 | ||
3480130a AK |
171 | /* safety check */ |
172 | if (radio->removed) | |
173 | return -EIO; | |
174 | ||
2aa72f3b AK |
175 | mutex_lock(&radio->lock); |
176 | ||
177 | radio->buffer[0] = 0x00; | |
178 | radio->buffer[1] = 0x55; | |
179 | radio->buffer[2] = 0xaa; | |
180 | radio->buffer[3] = 0x00; | |
db821804 AK |
181 | radio->buffer[4] = AMRADIO_SET_MUTE; |
182 | radio->buffer[5] = argument; | |
2aa72f3b AK |
183 | radio->buffer[6] = 0x00; |
184 | radio->buffer[7] = 0x00; | |
185 | ||
186 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
187 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
188 | ||
e57458dc | 189 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
190 | mutex_unlock(&radio->lock); |
191 | return retval; | |
192 | } | |
193 | ||
db821804 | 194 | radio->muted = argument; |
2aa72f3b | 195 | |
7f03a585 AK |
196 | mutex_unlock(&radio->lock); |
197 | ||
2aa72f3b AK |
198 | return retval; |
199 | } | |
200 | ||
201 | /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
202 | static int amradio_setfreq(struct amradio_device *radio, int freq) | |
203 | { | |
204 | int retval; | |
205 | int size; | |
f7c1a380 | 206 | unsigned short freq_send = 0x10 + (freq >> 3) / 25; |
2aa72f3b | 207 | |
3480130a AK |
208 | /* safety check */ |
209 | if (radio->removed) | |
210 | return -EIO; | |
211 | ||
2aa72f3b AK |
212 | mutex_lock(&radio->lock); |
213 | ||
214 | radio->buffer[0] = 0x00; | |
215 | radio->buffer[1] = 0x55; | |
216 | radio->buffer[2] = 0xaa; | |
217 | radio->buffer[3] = 0x03; | |
f7c1a380 | 218 | radio->buffer[4] = AMRADIO_SET_FREQ; |
2aa72f3b AK |
219 | radio->buffer[5] = 0x00; |
220 | radio->buffer[6] = 0x00; | |
221 | radio->buffer[7] = 0x08; | |
222 | ||
223 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
224 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
225 | ||
e57458dc | 226 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
227 | mutex_unlock(&radio->lock); |
228 | return retval; | |
229 | } | |
230 | ||
231 | /* frequency is calculated from freq_send and placed in first 2 bytes */ | |
232 | radio->buffer[0] = (freq_send >> 8) & 0xff; | |
233 | radio->buffer[1] = freq_send & 0xff; | |
234 | radio->buffer[2] = 0x01; | |
235 | radio->buffer[3] = 0x00; | |
236 | radio->buffer[4] = 0x00; | |
237 | /* 5 and 6 bytes of buffer already = 0x00 */ | |
238 | radio->buffer[7] = 0x00; | |
239 | ||
240 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
241 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
242 | ||
e57458dc | 243 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
244 | mutex_unlock(&radio->lock); |
245 | return retval; | |
246 | } | |
247 | ||
1bb16d71 AK |
248 | mutex_unlock(&radio->lock); |
249 | ||
250 | return retval; | |
251 | } | |
252 | ||
253 | static int amradio_set_stereo(struct amradio_device *radio, char argument) | |
254 | { | |
255 | int retval; | |
256 | int size; | |
257 | ||
258 | /* safety check */ | |
259 | if (radio->removed) | |
260 | return -EIO; | |
261 | ||
262 | mutex_lock(&radio->lock); | |
263 | ||
264 | radio->buffer[0] = 0x00; | |
265 | radio->buffer[1] = 0x55; | |
266 | radio->buffer[2] = 0xaa; | |
267 | radio->buffer[3] = 0x00; | |
268 | radio->buffer[4] = AMRADIO_SET_MONO; | |
269 | radio->buffer[5] = argument; | |
270 | radio->buffer[6] = 0x00; | |
271 | radio->buffer[7] = 0x00; | |
272 | ||
273 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
274 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
275 | ||
276 | if (retval < 0 || size != BUFFER_LENGTH) { | |
277 | radio->stereo = -1; | |
278 | mutex_unlock(&radio->lock); | |
279 | return retval; | |
280 | } | |
281 | ||
282 | radio->stereo = 1; | |
2aa72f3b | 283 | |
7f03a585 AK |
284 | mutex_unlock(&radio->lock); |
285 | ||
2aa72f3b AK |
286 | return retval; |
287 | } | |
288 | ||
71f07d94 AK |
289 | /* Handle unplugging the device. |
290 | * We call video_unregister_device in any case. | |
291 | * The last function called in this procedure is | |
292 | * usb_amradio_device_release. | |
293 | */ | |
2aa72f3b AK |
294 | static void usb_amradio_disconnect(struct usb_interface *intf) |
295 | { | |
296 | struct amradio_device *radio = usb_get_intfdata(intf); | |
297 | ||
f4e9043e | 298 | mutex_lock(&radio->lock); |
3480130a | 299 | radio->removed = 1; |
f4e9043e | 300 | mutex_unlock(&radio->lock); |
2aa72f3b | 301 | |
f4e9043e AK |
302 | usb_set_intfdata(intf, NULL); |
303 | video_unregister_device(radio->videodev); | |
b466248d | 304 | v4l2_device_disconnect(&radio->v4l2_dev); |
2aa72f3b AK |
305 | } |
306 | ||
307 | /* vidioc_querycap - query device capabilities */ | |
308 | static int vidioc_querycap(struct file *file, void *priv, | |
309 | struct v4l2_capability *v) | |
310 | { | |
c7181cfa AK |
311 | struct amradio_device *radio = video_drvdata(file); |
312 | ||
2aa72f3b AK |
313 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); |
314 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); | |
c7181cfa | 315 | usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); |
2aa72f3b AK |
316 | v->version = RADIO_VERSION; |
317 | v->capabilities = V4L2_CAP_TUNER; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | /* vidioc_g_tuner - get tuner attributes */ | |
322 | static int vidioc_g_tuner(struct file *file, void *priv, | |
323 | struct v4l2_tuner *v) | |
324 | { | |
325 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
1bb16d71 | 326 | int retval; |
2aa72f3b | 327 | |
3480130a AK |
328 | /* safety check */ |
329 | if (radio->removed) | |
330 | return -EIO; | |
331 | ||
2aa72f3b AK |
332 | if (v->index > 0) |
333 | return -EINVAL; | |
334 | ||
335 | /* TODO: Add function which look is signal stereo or not | |
336 | * amradio_getstat(radio); | |
337 | */ | |
1bb16d71 AK |
338 | |
339 | /* we call amradio_set_stereo to set radio->stereo | |
340 | * Honestly, amradio_getstat should cover this in future and | |
341 | * amradio_set_stereo shouldn't be here | |
342 | */ | |
343 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
344 | if (retval < 0) | |
345 | amradio_dev_warn(&radio->videodev->dev, | |
346 | "set stereo failed\n"); | |
347 | ||
2aa72f3b AK |
348 | strcpy(v->name, "FM"); |
349 | v->type = V4L2_TUNER_RADIO; | |
350 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
351 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
352 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
353 | v->capability = V4L2_TUNER_CAP_LOW; | |
354 | if (radio->stereo) | |
355 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
356 | else | |
357 | v->audmode = V4L2_TUNER_MODE_MONO; | |
358 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ | |
359 | v->afc = 0; /* Don't know what is this */ | |
360 | return 0; | |
361 | } | |
362 | ||
363 | /* vidioc_s_tuner - set tuner attributes */ | |
364 | static int vidioc_s_tuner(struct file *file, void *priv, | |
365 | struct v4l2_tuner *v) | |
366 | { | |
3480130a | 367 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
1bb16d71 | 368 | int retval; |
3480130a AK |
369 | |
370 | /* safety check */ | |
371 | if (radio->removed) | |
372 | return -EIO; | |
373 | ||
2aa72f3b AK |
374 | if (v->index > 0) |
375 | return -EINVAL; | |
1bb16d71 AK |
376 | |
377 | /* mono/stereo selector */ | |
378 | switch (v->audmode) { | |
379 | case V4L2_TUNER_MODE_MONO: | |
380 | retval = amradio_set_stereo(radio, WANT_MONO); | |
381 | if (retval < 0) | |
382 | amradio_dev_warn(&radio->videodev->dev, | |
383 | "set mono failed\n"); | |
384 | break; | |
385 | case V4L2_TUNER_MODE_STEREO: | |
386 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
387 | if (retval < 0) | |
388 | amradio_dev_warn(&radio->videodev->dev, | |
389 | "set stereo failed\n"); | |
390 | break; | |
391 | default: | |
392 | return -EINVAL; | |
393 | } | |
394 | ||
2aa72f3b AK |
395 | return 0; |
396 | } | |
397 | ||
398 | /* vidioc_s_frequency - set tuner radio frequency */ | |
399 | static int vidioc_s_frequency(struct file *file, void *priv, | |
400 | struct v4l2_frequency *f) | |
401 | { | |
402 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 403 | int retval; |
2aa72f3b | 404 | |
3480130a AK |
405 | /* safety check */ |
406 | if (radio->removed) | |
407 | return -EIO; | |
408 | ||
52433bbb | 409 | mutex_lock(&radio->lock); |
2aa72f3b | 410 | radio->curfreq = f->frequency; |
52433bbb AK |
411 | mutex_unlock(&radio->lock); |
412 | ||
a5d69475 AK |
413 | retval = amradio_setfreq(radio, radio->curfreq); |
414 | if (retval < 0) | |
e60b022e AK |
415 | amradio_dev_warn(&radio->videodev->dev, |
416 | "set frequency failed\n"); | |
2aa72f3b AK |
417 | return 0; |
418 | } | |
419 | ||
420 | /* vidioc_g_frequency - get tuner radio frequency */ | |
421 | static int vidioc_g_frequency(struct file *file, void *priv, | |
422 | struct v4l2_frequency *f) | |
423 | { | |
424 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
425 | ||
3480130a AK |
426 | /* safety check */ |
427 | if (radio->removed) | |
428 | return -EIO; | |
429 | ||
2aa72f3b AK |
430 | f->type = V4L2_TUNER_RADIO; |
431 | f->frequency = radio->curfreq; | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* vidioc_queryctrl - enumerate control items */ | |
436 | static int vidioc_queryctrl(struct file *file, void *priv, | |
437 | struct v4l2_queryctrl *qc) | |
438 | { | |
b466248d AK |
439 | switch (qc->id) { |
440 | case V4L2_CID_AUDIO_MUTE: | |
441 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
2aa72f3b | 442 | } |
b466248d | 443 | |
2aa72f3b AK |
444 | return -EINVAL; |
445 | } | |
446 | ||
447 | /* vidioc_g_ctrl - get the value of a control */ | |
448 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
449 | struct v4l2_control *ctrl) | |
450 | { | |
451 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
452 | ||
3480130a AK |
453 | /* safety check */ |
454 | if (radio->removed) | |
455 | return -EIO; | |
456 | ||
2aa72f3b AK |
457 | switch (ctrl->id) { |
458 | case V4L2_CID_AUDIO_MUTE: | |
459 | ctrl->value = radio->muted; | |
460 | return 0; | |
461 | } | |
462 | return -EINVAL; | |
463 | } | |
464 | ||
465 | /* vidioc_s_ctrl - set the value of a control */ | |
466 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
467 | struct v4l2_control *ctrl) | |
468 | { | |
469 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 470 | int retval; |
2aa72f3b | 471 | |
3480130a AK |
472 | /* safety check */ |
473 | if (radio->removed) | |
474 | return -EIO; | |
475 | ||
2aa72f3b AK |
476 | switch (ctrl->id) { |
477 | case V4L2_CID_AUDIO_MUTE: | |
478 | if (ctrl->value) { | |
db821804 | 479 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 480 | if (retval < 0) { |
e60b022e AK |
481 | amradio_dev_warn(&radio->videodev->dev, |
482 | "amradio_stop failed\n"); | |
2aa72f3b AK |
483 | return -1; |
484 | } | |
485 | } else { | |
db821804 | 486 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 487 | if (retval < 0) { |
e60b022e AK |
488 | amradio_dev_warn(&radio->videodev->dev, |
489 | "amradio_start failed\n"); | |
2aa72f3b AK |
490 | return -1; |
491 | } | |
492 | } | |
493 | return 0; | |
494 | } | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | /* vidioc_g_audio - get audio attributes */ | |
499 | static int vidioc_g_audio(struct file *file, void *priv, | |
500 | struct v4l2_audio *a) | |
501 | { | |
502 | if (a->index > 1) | |
503 | return -EINVAL; | |
504 | ||
505 | strcpy(a->name, "Radio"); | |
506 | a->capability = V4L2_AUDCAP_STEREO; | |
507 | return 0; | |
508 | } | |
509 | ||
510 | /* vidioc_s_audio - set audio attributes */ | |
511 | static int vidioc_s_audio(struct file *file, void *priv, | |
512 | struct v4l2_audio *a) | |
513 | { | |
514 | if (a->index != 0) | |
515 | return -EINVAL; | |
516 | return 0; | |
517 | } | |
518 | ||
519 | /* vidioc_g_input - get input */ | |
520 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
521 | { | |
522 | *i = 0; | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* vidioc_s_input - set input */ | |
527 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
528 | { | |
529 | if (i != 0) | |
530 | return -EINVAL; | |
531 | return 0; | |
532 | } | |
533 | ||
534 | /* open device - amradio_start() and amradio_setfreq() */ | |
bec43661 | 535 | static int usb_amradio_open(struct file *file) |
2aa72f3b AK |
536 | { |
537 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 538 | int retval; |
2aa72f3b | 539 | |
0fabb783 AK |
540 | lock_kernel(); |
541 | ||
2aa72f3b AK |
542 | radio->users = 1; |
543 | radio->muted = 1; | |
544 | ||
db821804 | 545 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 546 | if (retval < 0) { |
e60b022e AK |
547 | amradio_dev_warn(&radio->videodev->dev, |
548 | "radio did not start up properly\n"); | |
2aa72f3b | 549 | radio->users = 0; |
0fabb783 | 550 | unlock_kernel(); |
2aa72f3b AK |
551 | return -EIO; |
552 | } | |
a5d69475 | 553 | |
1bb16d71 AK |
554 | retval = amradio_set_stereo(radio, WANT_STEREO); |
555 | if (retval < 0) | |
556 | amradio_dev_warn(&radio->videodev->dev, | |
557 | "set stereo failed\n"); | |
558 | ||
a5d69475 AK |
559 | retval = amradio_setfreq(radio, radio->curfreq); |
560 | if (retval < 0) | |
e60b022e AK |
561 | amradio_dev_warn(&radio->videodev->dev, |
562 | "set frequency failed\n"); | |
0fabb783 AK |
563 | |
564 | unlock_kernel(); | |
2aa72f3b AK |
565 | return 0; |
566 | } | |
567 | ||
f4e9043e | 568 | /*close device */ |
bec43661 | 569 | static int usb_amradio_close(struct file *file) |
2aa72f3b AK |
570 | { |
571 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
3480130a | 572 | int retval; |
2aa72f3b AK |
573 | |
574 | if (!radio) | |
575 | return -ENODEV; | |
3480130a | 576 | |
52433bbb | 577 | mutex_lock(&radio->lock); |
2aa72f3b | 578 | radio->users = 0; |
52433bbb | 579 | mutex_unlock(&radio->lock); |
3480130a | 580 | |
f4e9043e | 581 | if (!radio->removed) { |
db821804 | 582 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
3480130a AK |
583 | if (retval < 0) |
584 | amradio_dev_warn(&radio->videodev->dev, | |
585 | "amradio_stop failed\n"); | |
2aa72f3b | 586 | } |
3480130a | 587 | |
2aa72f3b AK |
588 | return 0; |
589 | } | |
590 | ||
591 | /* Suspend device - stop device. Need to be checked and fixed */ | |
592 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) | |
593 | { | |
594 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 595 | int retval; |
2aa72f3b | 596 | |
db821804 | 597 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 598 | if (retval < 0) |
e60b022e | 599 | dev_warn(&intf->dev, "amradio_stop failed\n"); |
2aa72f3b | 600 | |
e60b022e | 601 | dev_info(&intf->dev, "going into suspend..\n"); |
2aa72f3b AK |
602 | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* Resume device - start device. Need to be checked and fixed */ | |
607 | static int usb_amradio_resume(struct usb_interface *intf) | |
608 | { | |
609 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 610 | int retval; |
2aa72f3b | 611 | |
db821804 | 612 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 613 | if (retval < 0) |
e60b022e | 614 | dev_warn(&intf->dev, "amradio_start failed\n"); |
2aa72f3b | 615 | |
e60b022e | 616 | dev_info(&intf->dev, "coming out of suspend..\n"); |
2aa72f3b AK |
617 | |
618 | return 0; | |
619 | } | |
620 | ||
621 | /* File system interface */ | |
bec43661 | 622 | static const struct v4l2_file_operations usb_amradio_fops = { |
2aa72f3b AK |
623 | .owner = THIS_MODULE, |
624 | .open = usb_amradio_open, | |
625 | .release = usb_amradio_close, | |
626 | .ioctl = video_ioctl2, | |
2aa72f3b AK |
627 | }; |
628 | ||
629 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { | |
630 | .vidioc_querycap = vidioc_querycap, | |
631 | .vidioc_g_tuner = vidioc_g_tuner, | |
632 | .vidioc_s_tuner = vidioc_s_tuner, | |
633 | .vidioc_g_frequency = vidioc_g_frequency, | |
634 | .vidioc_s_frequency = vidioc_s_frequency, | |
635 | .vidioc_queryctrl = vidioc_queryctrl, | |
636 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
637 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
638 | .vidioc_g_audio = vidioc_g_audio, | |
639 | .vidioc_s_audio = vidioc_s_audio, | |
640 | .vidioc_g_input = vidioc_g_input, | |
641 | .vidioc_s_input = vidioc_s_input, | |
642 | }; | |
643 | ||
b466248d | 644 | static void usb_amradio_video_device_release(struct video_device *videodev) |
f4e9043e AK |
645 | { |
646 | struct amradio_device *radio = video_get_drvdata(videodev); | |
647 | ||
648 | /* we call v4l to free radio->videodev */ | |
649 | video_device_release(videodev); | |
650 | ||
b466248d AK |
651 | v4l2_device_unregister(&radio->v4l2_dev); |
652 | ||
f4e9043e AK |
653 | /* free rest memory */ |
654 | kfree(radio->buffer); | |
655 | kfree(radio); | |
656 | } | |
657 | ||
a5d69475 | 658 | /* check if the device is present and register with v4l and usb if it is */ |
2aa72f3b AK |
659 | static int usb_amradio_probe(struct usb_interface *intf, |
660 | const struct usb_device_id *id) | |
661 | { | |
662 | struct amradio_device *radio; | |
b466248d | 663 | struct v4l2_device *v4l2_dev; |
a5d69475 | 664 | int retval; |
2aa72f3b | 665 | |
b466248d | 666 | radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); |
2aa72f3b | 667 | |
8edafcc6 AK |
668 | if (!radio) { |
669 | dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); | |
2aa72f3b | 670 | return -ENOMEM; |
8edafcc6 | 671 | } |
2aa72f3b AK |
672 | |
673 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); | |
674 | ||
8edafcc6 AK |
675 | if (!radio->buffer) { |
676 | dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); | |
2aa72f3b AK |
677 | kfree(radio); |
678 | return -ENOMEM; | |
679 | } | |
680 | ||
b466248d AK |
681 | v4l2_dev = &radio->v4l2_dev; |
682 | retval = v4l2_device_register(&intf->dev, v4l2_dev); | |
683 | if (retval < 0) { | |
684 | dev_err(&intf->dev, "couldn't register v4l2_device\n"); | |
685 | kfree(radio->buffer); | |
686 | kfree(radio); | |
687 | return retval; | |
688 | } | |
689 | ||
2aa72f3b AK |
690 | radio->videodev = video_device_alloc(); |
691 | ||
8edafcc6 AK |
692 | if (!radio->videodev) { |
693 | dev_err(&intf->dev, "video_device_alloc failed\n"); | |
2aa72f3b AK |
694 | kfree(radio->buffer); |
695 | kfree(radio); | |
696 | return -ENOMEM; | |
697 | } | |
698 | ||
b466248d AK |
699 | strlcpy(radio->videodev->name, v4l2_dev->name, sizeof(radio->videodev->name)); |
700 | radio->videodev->v4l2_dev = v4l2_dev; | |
701 | radio->videodev->fops = &usb_amradio_fops; | |
702 | radio->videodev->ioctl_ops = &usb_amradio_ioctl_ops; | |
703 | radio->videodev->release = usb_amradio_video_device_release; | |
2aa72f3b AK |
704 | |
705 | radio->removed = 0; | |
706 | radio->users = 0; | |
707 | radio->usbdev = interface_to_usbdev(intf); | |
708 | radio->curfreq = 95.16 * FREQ_MUL; | |
1bb16d71 | 709 | radio->stereo = -1; |
2aa72f3b AK |
710 | |
711 | mutex_init(&radio->lock); | |
712 | ||
713 | video_set_drvdata(radio->videodev, radio); | |
b466248d | 714 | |
a5d69475 AK |
715 | retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
716 | if (retval < 0) { | |
65c51dc9 | 717 | dev_err(&intf->dev, "could not register video device\n"); |
2aa72f3b | 718 | video_device_release(radio->videodev); |
b466248d | 719 | v4l2_device_unregister(v4l2_dev); |
2aa72f3b AK |
720 | kfree(radio->buffer); |
721 | kfree(radio); | |
722 | return -EIO; | |
723 | } | |
724 | ||
725 | usb_set_intfdata(intf, radio); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static int __init amradio_init(void) | |
730 | { | |
731 | int retval = usb_register(&usb_amradio_driver); | |
732 | ||
e60b022e AK |
733 | pr_info(KBUILD_MODNAME |
734 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); | |
735 | ||
2aa72f3b | 736 | if (retval) |
e60b022e AK |
737 | pr_err(KBUILD_MODNAME |
738 | ": usb_register failed. Error number %d\n", retval); | |
739 | ||
2aa72f3b AK |
740 | return retval; |
741 | } | |
742 | ||
743 | static void __exit amradio_exit(void) | |
744 | { | |
745 | usb_deregister(&usb_amradio_driver); | |
746 | } | |
747 | ||
748 | module_init(amradio_init); | |
749 | module_exit(amradio_exit); | |
750 |