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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 | /* | |
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: | |
49 | * - Correct power managment 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> | |
61 | #include <linux/input.h> | |
62 | #include <linux/videodev2.h> | |
b466248d | 63 | #include <media/v4l2-device.h> |
2aa72f3b AK |
64 | #include <media/v4l2-ioctl.h> |
65 | #include <linux/usb.h> | |
66 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
67 | ||
68 | /* driver and module definitions */ | |
69 | #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" | |
70 | #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" | |
b466248d AK |
71 | #define DRIVER_VERSION "0.11" |
72 | #define RADIO_VERSION KERNEL_VERSION(0, 1, 1) | |
2aa72f3b AK |
73 | |
74 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
75 | MODULE_DESCRIPTION(DRIVER_DESC); | |
76 | MODULE_LICENSE("GPL"); | |
77 | ||
78 | #define USB_AMRADIO_VENDOR 0x07ca | |
79 | #define USB_AMRADIO_PRODUCT 0xb800 | |
80 | ||
e60b022e AK |
81 | /* dev_warn macro with driver name */ |
82 | #define MR800_DRIVER_NAME "radio-mr800" | |
83 | #define amradio_dev_warn(dev, fmt, arg...) \ | |
84 | dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) | |
85 | ||
2aa72f3b AK |
86 | /* Probably USB_TIMEOUT should be modified in module parameter */ |
87 | #define BUFFER_LENGTH 8 | |
88 | #define USB_TIMEOUT 500 | |
89 | ||
90 | /* Frequency limits in MHz -- these are European values. For Japanese | |
91 | devices, that would be 76 and 91. */ | |
92 | #define FREQ_MIN 87.5 | |
93 | #define FREQ_MAX 108.0 | |
94 | #define FREQ_MUL 16000 | |
95 | ||
db821804 AK |
96 | /* |
97 | * Commands that device should understand | |
98 | * List isnt full and will be updated with implementation of new functions | |
99 | */ | |
f7c1a380 | 100 | #define AMRADIO_SET_FREQ 0xa4 |
db821804 | 101 | #define AMRADIO_SET_MUTE 0xab |
1bb16d71 | 102 | #define AMRADIO_SET_MONO 0xae |
db821804 AK |
103 | |
104 | /* Comfortable defines for amradio_set_mute */ | |
105 | #define AMRADIO_START 0x00 | |
106 | #define AMRADIO_STOP 0x01 | |
107 | ||
1bb16d71 AK |
108 | /* Comfortable defines for amradio_set_stereo */ |
109 | #define WANT_STEREO 0x00 | |
110 | #define WANT_MONO 0x01 | |
111 | ||
2aa72f3b AK |
112 | /* module parameter */ |
113 | static int radio_nr = -1; | |
114 | module_param(radio_nr, int, 0); | |
115 | MODULE_PARM_DESC(radio_nr, "Radio Nr"); | |
116 | ||
2aa72f3b AK |
117 | static int usb_amradio_probe(struct usb_interface *intf, |
118 | const struct usb_device_id *id); | |
119 | static void usb_amradio_disconnect(struct usb_interface *intf); | |
bec43661 HV |
120 | static int usb_amradio_open(struct file *file); |
121 | static int usb_amradio_close(struct file *file); | |
2aa72f3b AK |
122 | static int usb_amradio_suspend(struct usb_interface *intf, |
123 | pm_message_t message); | |
124 | static int usb_amradio_resume(struct usb_interface *intf); | |
125 | ||
126 | /* Data for one (physical) device */ | |
127 | struct amradio_device { | |
128 | /* reference to USB and video device */ | |
129 | struct usb_device *usbdev; | |
130 | struct video_device *videodev; | |
b466248d | 131 | struct v4l2_device v4l2_dev; |
2aa72f3b AK |
132 | |
133 | unsigned char *buffer; | |
134 | struct mutex lock; /* buffer locking */ | |
135 | int curfreq; | |
136 | int stereo; | |
137 | int users; | |
138 | int removed; | |
139 | int muted; | |
140 | }; | |
141 | ||
142 | /* USB Device ID List */ | |
143 | static struct usb_device_id usb_amradio_device_table[] = { | |
144 | {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, | |
145 | USB_CLASS_HID, 0, 0) }, | |
146 | { } /* Terminating entry */ | |
147 | }; | |
148 | ||
149 | MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); | |
150 | ||
151 | /* USB subsystem interface */ | |
152 | static struct usb_driver usb_amradio_driver = { | |
e60b022e | 153 | .name = MR800_DRIVER_NAME, |
2aa72f3b AK |
154 | .probe = usb_amradio_probe, |
155 | .disconnect = usb_amradio_disconnect, | |
156 | .suspend = usb_amradio_suspend, | |
157 | .resume = usb_amradio_resume, | |
158 | .reset_resume = usb_amradio_resume, | |
159 | .id_table = usb_amradio_device_table, | |
f2ce9179 | 160 | .supports_autosuspend = 0, |
2aa72f3b AK |
161 | }; |
162 | ||
db821804 AK |
163 | /* switch on/off the radio. Send 8 bytes to device */ |
164 | static int amradio_set_mute(struct amradio_device *radio, char argument) | |
2aa72f3b AK |
165 | { |
166 | int retval; | |
167 | int size; | |
168 | ||
3480130a AK |
169 | /* safety check */ |
170 | if (radio->removed) | |
171 | return -EIO; | |
172 | ||
2aa72f3b AK |
173 | mutex_lock(&radio->lock); |
174 | ||
175 | radio->buffer[0] = 0x00; | |
176 | radio->buffer[1] = 0x55; | |
177 | radio->buffer[2] = 0xaa; | |
178 | radio->buffer[3] = 0x00; | |
db821804 AK |
179 | radio->buffer[4] = AMRADIO_SET_MUTE; |
180 | radio->buffer[5] = argument; | |
2aa72f3b AK |
181 | radio->buffer[6] = 0x00; |
182 | radio->buffer[7] = 0x00; | |
183 | ||
184 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
185 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
186 | ||
e57458dc | 187 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
188 | mutex_unlock(&radio->lock); |
189 | return retval; | |
190 | } | |
191 | ||
db821804 | 192 | radio->muted = argument; |
2aa72f3b | 193 | |
7f03a585 AK |
194 | mutex_unlock(&radio->lock); |
195 | ||
2aa72f3b AK |
196 | return retval; |
197 | } | |
198 | ||
199 | /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ | |
200 | static int amradio_setfreq(struct amradio_device *radio, int freq) | |
201 | { | |
202 | int retval; | |
203 | int size; | |
f7c1a380 | 204 | unsigned short freq_send = 0x10 + (freq >> 3) / 25; |
2aa72f3b | 205 | |
3480130a AK |
206 | /* safety check */ |
207 | if (radio->removed) | |
208 | return -EIO; | |
209 | ||
2aa72f3b AK |
210 | mutex_lock(&radio->lock); |
211 | ||
212 | radio->buffer[0] = 0x00; | |
213 | radio->buffer[1] = 0x55; | |
214 | radio->buffer[2] = 0xaa; | |
215 | radio->buffer[3] = 0x03; | |
f7c1a380 | 216 | radio->buffer[4] = AMRADIO_SET_FREQ; |
2aa72f3b AK |
217 | radio->buffer[5] = 0x00; |
218 | radio->buffer[6] = 0x00; | |
219 | radio->buffer[7] = 0x08; | |
220 | ||
221 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
222 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
223 | ||
e57458dc | 224 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
225 | mutex_unlock(&radio->lock); |
226 | return retval; | |
227 | } | |
228 | ||
229 | /* frequency is calculated from freq_send and placed in first 2 bytes */ | |
230 | radio->buffer[0] = (freq_send >> 8) & 0xff; | |
231 | radio->buffer[1] = freq_send & 0xff; | |
232 | radio->buffer[2] = 0x01; | |
233 | radio->buffer[3] = 0x00; | |
234 | radio->buffer[4] = 0x00; | |
235 | /* 5 and 6 bytes of buffer already = 0x00 */ | |
236 | radio->buffer[7] = 0x00; | |
237 | ||
238 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
239 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
240 | ||
e57458dc | 241 | if (retval < 0 || size != BUFFER_LENGTH) { |
2aa72f3b AK |
242 | mutex_unlock(&radio->lock); |
243 | return retval; | |
244 | } | |
245 | ||
1bb16d71 AK |
246 | mutex_unlock(&radio->lock); |
247 | ||
248 | return retval; | |
249 | } | |
250 | ||
251 | static int amradio_set_stereo(struct amradio_device *radio, char argument) | |
252 | { | |
253 | int retval; | |
254 | int size; | |
255 | ||
256 | /* safety check */ | |
257 | if (radio->removed) | |
258 | return -EIO; | |
259 | ||
260 | mutex_lock(&radio->lock); | |
261 | ||
262 | radio->buffer[0] = 0x00; | |
263 | radio->buffer[1] = 0x55; | |
264 | radio->buffer[2] = 0xaa; | |
265 | radio->buffer[3] = 0x00; | |
266 | radio->buffer[4] = AMRADIO_SET_MONO; | |
267 | radio->buffer[5] = argument; | |
268 | radio->buffer[6] = 0x00; | |
269 | radio->buffer[7] = 0x00; | |
270 | ||
271 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
272 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
273 | ||
274 | if (retval < 0 || size != BUFFER_LENGTH) { | |
275 | radio->stereo = -1; | |
276 | mutex_unlock(&radio->lock); | |
277 | return retval; | |
278 | } | |
279 | ||
280 | radio->stereo = 1; | |
2aa72f3b | 281 | |
7f03a585 AK |
282 | mutex_unlock(&radio->lock); |
283 | ||
2aa72f3b AK |
284 | return retval; |
285 | } | |
286 | ||
71f07d94 AK |
287 | /* Handle unplugging the device. |
288 | * We call video_unregister_device in any case. | |
289 | * The last function called in this procedure is | |
290 | * usb_amradio_device_release. | |
291 | */ | |
2aa72f3b AK |
292 | static void usb_amradio_disconnect(struct usb_interface *intf) |
293 | { | |
294 | struct amradio_device *radio = usb_get_intfdata(intf); | |
295 | ||
f4e9043e | 296 | mutex_lock(&radio->lock); |
3480130a | 297 | radio->removed = 1; |
f4e9043e | 298 | mutex_unlock(&radio->lock); |
2aa72f3b | 299 | |
f4e9043e AK |
300 | usb_set_intfdata(intf, NULL); |
301 | video_unregister_device(radio->videodev); | |
b466248d | 302 | v4l2_device_disconnect(&radio->v4l2_dev); |
2aa72f3b AK |
303 | } |
304 | ||
305 | /* vidioc_querycap - query device capabilities */ | |
306 | static int vidioc_querycap(struct file *file, void *priv, | |
307 | struct v4l2_capability *v) | |
308 | { | |
c7181cfa AK |
309 | struct amradio_device *radio = video_drvdata(file); |
310 | ||
2aa72f3b AK |
311 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); |
312 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); | |
c7181cfa | 313 | usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); |
2aa72f3b AK |
314 | v->version = RADIO_VERSION; |
315 | v->capabilities = V4L2_CAP_TUNER; | |
316 | return 0; | |
317 | } | |
318 | ||
319 | /* vidioc_g_tuner - get tuner attributes */ | |
320 | static int vidioc_g_tuner(struct file *file, void *priv, | |
321 | struct v4l2_tuner *v) | |
322 | { | |
323 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
1bb16d71 | 324 | int retval; |
2aa72f3b | 325 | |
3480130a AK |
326 | /* safety check */ |
327 | if (radio->removed) | |
328 | return -EIO; | |
329 | ||
2aa72f3b AK |
330 | if (v->index > 0) |
331 | return -EINVAL; | |
332 | ||
333 | /* TODO: Add function which look is signal stereo or not | |
334 | * amradio_getstat(radio); | |
335 | */ | |
1bb16d71 AK |
336 | |
337 | /* we call amradio_set_stereo to set radio->stereo | |
338 | * Honestly, amradio_getstat should cover this in future and | |
339 | * amradio_set_stereo shouldn't be here | |
340 | */ | |
341 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
342 | if (retval < 0) | |
343 | amradio_dev_warn(&radio->videodev->dev, | |
344 | "set stereo failed\n"); | |
345 | ||
2aa72f3b AK |
346 | strcpy(v->name, "FM"); |
347 | v->type = V4L2_TUNER_RADIO; | |
348 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
349 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
350 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
351 | v->capability = V4L2_TUNER_CAP_LOW; | |
352 | if (radio->stereo) | |
353 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
354 | else | |
355 | v->audmode = V4L2_TUNER_MODE_MONO; | |
356 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ | |
357 | v->afc = 0; /* Don't know what is this */ | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /* vidioc_s_tuner - set tuner attributes */ | |
362 | static int vidioc_s_tuner(struct file *file, void *priv, | |
363 | struct v4l2_tuner *v) | |
364 | { | |
3480130a | 365 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); |
1bb16d71 | 366 | int retval; |
3480130a AK |
367 | |
368 | /* safety check */ | |
369 | if (radio->removed) | |
370 | return -EIO; | |
371 | ||
2aa72f3b AK |
372 | if (v->index > 0) |
373 | return -EINVAL; | |
1bb16d71 AK |
374 | |
375 | /* mono/stereo selector */ | |
376 | switch (v->audmode) { | |
377 | case V4L2_TUNER_MODE_MONO: | |
378 | retval = amradio_set_stereo(radio, WANT_MONO); | |
379 | if (retval < 0) | |
380 | amradio_dev_warn(&radio->videodev->dev, | |
381 | "set mono failed\n"); | |
382 | break; | |
383 | case V4L2_TUNER_MODE_STEREO: | |
384 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
385 | if (retval < 0) | |
386 | amradio_dev_warn(&radio->videodev->dev, | |
387 | "set stereo failed\n"); | |
388 | break; | |
389 | default: | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
2aa72f3b AK |
393 | return 0; |
394 | } | |
395 | ||
396 | /* vidioc_s_frequency - set tuner radio frequency */ | |
397 | static int vidioc_s_frequency(struct file *file, void *priv, | |
398 | struct v4l2_frequency *f) | |
399 | { | |
400 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 401 | int retval; |
2aa72f3b | 402 | |
3480130a AK |
403 | /* safety check */ |
404 | if (radio->removed) | |
405 | return -EIO; | |
406 | ||
52433bbb | 407 | mutex_lock(&radio->lock); |
2aa72f3b | 408 | radio->curfreq = f->frequency; |
52433bbb AK |
409 | mutex_unlock(&radio->lock); |
410 | ||
a5d69475 AK |
411 | retval = amradio_setfreq(radio, radio->curfreq); |
412 | if (retval < 0) | |
e60b022e AK |
413 | amradio_dev_warn(&radio->videodev->dev, |
414 | "set frequency failed\n"); | |
2aa72f3b AK |
415 | return 0; |
416 | } | |
417 | ||
418 | /* vidioc_g_frequency - get tuner radio frequency */ | |
419 | static int vidioc_g_frequency(struct file *file, void *priv, | |
420 | struct v4l2_frequency *f) | |
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 | f->type = V4L2_TUNER_RADIO; |
429 | f->frequency = radio->curfreq; | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* vidioc_queryctrl - enumerate control items */ | |
434 | static int vidioc_queryctrl(struct file *file, void *priv, | |
435 | struct v4l2_queryctrl *qc) | |
436 | { | |
b466248d AK |
437 | switch (qc->id) { |
438 | case V4L2_CID_AUDIO_MUTE: | |
439 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
2aa72f3b | 440 | } |
b466248d | 441 | |
2aa72f3b AK |
442 | return -EINVAL; |
443 | } | |
444 | ||
445 | /* vidioc_g_ctrl - get the value of a control */ | |
446 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
447 | struct v4l2_control *ctrl) | |
448 | { | |
449 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
450 | ||
3480130a AK |
451 | /* safety check */ |
452 | if (radio->removed) | |
453 | return -EIO; | |
454 | ||
2aa72f3b AK |
455 | switch (ctrl->id) { |
456 | case V4L2_CID_AUDIO_MUTE: | |
457 | ctrl->value = radio->muted; | |
458 | return 0; | |
459 | } | |
460 | return -EINVAL; | |
461 | } | |
462 | ||
463 | /* vidioc_s_ctrl - set the value of a control */ | |
464 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
465 | struct v4l2_control *ctrl) | |
466 | { | |
467 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 468 | int retval; |
2aa72f3b | 469 | |
3480130a AK |
470 | /* safety check */ |
471 | if (radio->removed) | |
472 | return -EIO; | |
473 | ||
2aa72f3b AK |
474 | switch (ctrl->id) { |
475 | case V4L2_CID_AUDIO_MUTE: | |
476 | if (ctrl->value) { | |
db821804 | 477 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 478 | if (retval < 0) { |
e60b022e AK |
479 | amradio_dev_warn(&radio->videodev->dev, |
480 | "amradio_stop failed\n"); | |
2aa72f3b AK |
481 | return -1; |
482 | } | |
483 | } else { | |
db821804 | 484 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 485 | if (retval < 0) { |
e60b022e AK |
486 | amradio_dev_warn(&radio->videodev->dev, |
487 | "amradio_start failed\n"); | |
2aa72f3b AK |
488 | return -1; |
489 | } | |
490 | } | |
491 | return 0; | |
492 | } | |
493 | return -EINVAL; | |
494 | } | |
495 | ||
496 | /* vidioc_g_audio - get audio attributes */ | |
497 | static int vidioc_g_audio(struct file *file, void *priv, | |
498 | struct v4l2_audio *a) | |
499 | { | |
500 | if (a->index > 1) | |
501 | return -EINVAL; | |
502 | ||
503 | strcpy(a->name, "Radio"); | |
504 | a->capability = V4L2_AUDCAP_STEREO; | |
505 | return 0; | |
506 | } | |
507 | ||
508 | /* vidioc_s_audio - set audio attributes */ | |
509 | static int vidioc_s_audio(struct file *file, void *priv, | |
510 | struct v4l2_audio *a) | |
511 | { | |
512 | if (a->index != 0) | |
513 | return -EINVAL; | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /* vidioc_g_input - get input */ | |
518 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
519 | { | |
520 | *i = 0; | |
521 | return 0; | |
522 | } | |
523 | ||
524 | /* vidioc_s_input - set input */ | |
525 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
526 | { | |
527 | if (i != 0) | |
528 | return -EINVAL; | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* open device - amradio_start() and amradio_setfreq() */ | |
bec43661 | 533 | static int usb_amradio_open(struct file *file) |
2aa72f3b AK |
534 | { |
535 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
a5d69475 | 536 | int retval; |
2aa72f3b | 537 | |
0fabb783 AK |
538 | lock_kernel(); |
539 | ||
2aa72f3b AK |
540 | radio->users = 1; |
541 | radio->muted = 1; | |
542 | ||
db821804 | 543 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 544 | if (retval < 0) { |
e60b022e AK |
545 | amradio_dev_warn(&radio->videodev->dev, |
546 | "radio did not start up properly\n"); | |
2aa72f3b | 547 | radio->users = 0; |
0fabb783 | 548 | unlock_kernel(); |
2aa72f3b AK |
549 | return -EIO; |
550 | } | |
a5d69475 | 551 | |
1bb16d71 AK |
552 | retval = amradio_set_stereo(radio, WANT_STEREO); |
553 | if (retval < 0) | |
554 | amradio_dev_warn(&radio->videodev->dev, | |
555 | "set stereo failed\n"); | |
556 | ||
a5d69475 AK |
557 | retval = amradio_setfreq(radio, radio->curfreq); |
558 | if (retval < 0) | |
e60b022e AK |
559 | amradio_dev_warn(&radio->videodev->dev, |
560 | "set frequency failed\n"); | |
0fabb783 AK |
561 | |
562 | unlock_kernel(); | |
2aa72f3b AK |
563 | return 0; |
564 | } | |
565 | ||
f4e9043e | 566 | /*close device */ |
bec43661 | 567 | static int usb_amradio_close(struct file *file) |
2aa72f3b AK |
568 | { |
569 | struct amradio_device *radio = video_get_drvdata(video_devdata(file)); | |
3480130a | 570 | int retval; |
2aa72f3b AK |
571 | |
572 | if (!radio) | |
573 | return -ENODEV; | |
3480130a | 574 | |
52433bbb | 575 | mutex_lock(&radio->lock); |
2aa72f3b | 576 | radio->users = 0; |
52433bbb | 577 | mutex_unlock(&radio->lock); |
3480130a | 578 | |
f4e9043e | 579 | if (!radio->removed) { |
db821804 | 580 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
3480130a AK |
581 | if (retval < 0) |
582 | amradio_dev_warn(&radio->videodev->dev, | |
583 | "amradio_stop failed\n"); | |
2aa72f3b | 584 | } |
3480130a | 585 | |
2aa72f3b AK |
586 | return 0; |
587 | } | |
588 | ||
589 | /* Suspend device - stop device. Need to be checked and fixed */ | |
590 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) | |
591 | { | |
592 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 593 | int retval; |
2aa72f3b | 594 | |
db821804 | 595 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
a5d69475 | 596 | if (retval < 0) |
e60b022e | 597 | dev_warn(&intf->dev, "amradio_stop failed\n"); |
2aa72f3b | 598 | |
e60b022e | 599 | dev_info(&intf->dev, "going into suspend..\n"); |
2aa72f3b AK |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
604 | /* Resume device - start device. Need to be checked and fixed */ | |
605 | static int usb_amradio_resume(struct usb_interface *intf) | |
606 | { | |
607 | struct amradio_device *radio = usb_get_intfdata(intf); | |
a5d69475 | 608 | int retval; |
2aa72f3b | 609 | |
db821804 | 610 | retval = amradio_set_mute(radio, AMRADIO_START); |
a5d69475 | 611 | if (retval < 0) |
e60b022e | 612 | dev_warn(&intf->dev, "amradio_start failed\n"); |
2aa72f3b | 613 | |
e60b022e | 614 | dev_info(&intf->dev, "coming out of suspend..\n"); |
2aa72f3b AK |
615 | |
616 | return 0; | |
617 | } | |
618 | ||
619 | /* File system interface */ | |
bec43661 | 620 | static const struct v4l2_file_operations usb_amradio_fops = { |
2aa72f3b AK |
621 | .owner = THIS_MODULE, |
622 | .open = usb_amradio_open, | |
623 | .release = usb_amradio_close, | |
624 | .ioctl = video_ioctl2, | |
2aa72f3b AK |
625 | }; |
626 | ||
627 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { | |
628 | .vidioc_querycap = vidioc_querycap, | |
629 | .vidioc_g_tuner = vidioc_g_tuner, | |
630 | .vidioc_s_tuner = vidioc_s_tuner, | |
631 | .vidioc_g_frequency = vidioc_g_frequency, | |
632 | .vidioc_s_frequency = vidioc_s_frequency, | |
633 | .vidioc_queryctrl = vidioc_queryctrl, | |
634 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
635 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
636 | .vidioc_g_audio = vidioc_g_audio, | |
637 | .vidioc_s_audio = vidioc_s_audio, | |
638 | .vidioc_g_input = vidioc_g_input, | |
639 | .vidioc_s_input = vidioc_s_input, | |
640 | }; | |
641 | ||
b466248d | 642 | static void usb_amradio_video_device_release(struct video_device *videodev) |
f4e9043e AK |
643 | { |
644 | struct amradio_device *radio = video_get_drvdata(videodev); | |
645 | ||
646 | /* we call v4l to free radio->videodev */ | |
647 | video_device_release(videodev); | |
648 | ||
b466248d AK |
649 | v4l2_device_unregister(&radio->v4l2_dev); |
650 | ||
f4e9043e AK |
651 | /* free rest memory */ |
652 | kfree(radio->buffer); | |
653 | kfree(radio); | |
654 | } | |
655 | ||
a5d69475 | 656 | /* check if the device is present and register with v4l and usb if it is */ |
2aa72f3b AK |
657 | static int usb_amradio_probe(struct usb_interface *intf, |
658 | const struct usb_device_id *id) | |
659 | { | |
660 | struct amradio_device *radio; | |
b466248d | 661 | struct v4l2_device *v4l2_dev; |
a5d69475 | 662 | int retval; |
2aa72f3b | 663 | |
b466248d | 664 | radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); |
2aa72f3b | 665 | |
8edafcc6 AK |
666 | if (!radio) { |
667 | dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); | |
2aa72f3b | 668 | return -ENOMEM; |
8edafcc6 | 669 | } |
2aa72f3b AK |
670 | |
671 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); | |
672 | ||
8edafcc6 AK |
673 | if (!radio->buffer) { |
674 | dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); | |
2aa72f3b AK |
675 | kfree(radio); |
676 | return -ENOMEM; | |
677 | } | |
678 | ||
b466248d AK |
679 | v4l2_dev = &radio->v4l2_dev; |
680 | retval = v4l2_device_register(&intf->dev, v4l2_dev); | |
681 | if (retval < 0) { | |
682 | dev_err(&intf->dev, "couldn't register v4l2_device\n"); | |
683 | kfree(radio->buffer); | |
684 | kfree(radio); | |
685 | return retval; | |
686 | } | |
687 | ||
2aa72f3b AK |
688 | radio->videodev = video_device_alloc(); |
689 | ||
8edafcc6 AK |
690 | if (!radio->videodev) { |
691 | dev_err(&intf->dev, "video_device_alloc failed\n"); | |
2aa72f3b AK |
692 | kfree(radio->buffer); |
693 | kfree(radio); | |
694 | return -ENOMEM; | |
695 | } | |
696 | ||
b466248d AK |
697 | strlcpy(radio->videodev->name, v4l2_dev->name, sizeof(radio->videodev->name)); |
698 | radio->videodev->v4l2_dev = v4l2_dev; | |
699 | radio->videodev->fops = &usb_amradio_fops; | |
700 | radio->videodev->ioctl_ops = &usb_amradio_ioctl_ops; | |
701 | radio->videodev->release = usb_amradio_video_device_release; | |
2aa72f3b AK |
702 | |
703 | radio->removed = 0; | |
704 | radio->users = 0; | |
705 | radio->usbdev = interface_to_usbdev(intf); | |
706 | radio->curfreq = 95.16 * FREQ_MUL; | |
1bb16d71 | 707 | radio->stereo = -1; |
2aa72f3b AK |
708 | |
709 | mutex_init(&radio->lock); | |
710 | ||
711 | video_set_drvdata(radio->videodev, radio); | |
b466248d | 712 | |
a5d69475 AK |
713 | retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
714 | if (retval < 0) { | |
65c51dc9 | 715 | dev_err(&intf->dev, "could not register video device\n"); |
2aa72f3b | 716 | video_device_release(radio->videodev); |
b466248d | 717 | v4l2_device_unregister(v4l2_dev); |
2aa72f3b AK |
718 | kfree(radio->buffer); |
719 | kfree(radio); | |
720 | return -EIO; | |
721 | } | |
722 | ||
723 | usb_set_intfdata(intf, radio); | |
724 | return 0; | |
725 | } | |
726 | ||
727 | static int __init amradio_init(void) | |
728 | { | |
729 | int retval = usb_register(&usb_amradio_driver); | |
730 | ||
e60b022e AK |
731 | pr_info(KBUILD_MODNAME |
732 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); | |
733 | ||
2aa72f3b | 734 | if (retval) |
e60b022e AK |
735 | pr_err(KBUILD_MODNAME |
736 | ": usb_register failed. Error number %d\n", retval); | |
737 | ||
2aa72f3b AK |
738 | return retval; |
739 | } | |
740 | ||
741 | static void __exit amradio_exit(void) | |
742 | { | |
743 | usb_deregister(&usb_amradio_driver); | |
744 | } | |
745 | ||
746 | module_init(amradio_init); | |
747 | module_exit(amradio_exit); | |
748 |