blob: ded25bfb366e7ccc748c60bdf17ba6685f668197 [file] [log] [blame]
Alexey Klimov2aa72f32008-10-01 09:40:59 -03001/*
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/*
Alexey Klimov71f07d92009-02-05 08:58:31 -030025 * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c
Alexey Klimov2aa72f32008-10-01 09:40:59 -030026 *
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).
Alexey Klimov71f07d92009-02-05 08:58:31 -030033 * 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
Alexey Klimov2aa72f32008-10-01 09:40:59 -030036 *
Alexey Klimov2aa72f32008-10-01 09:40:59 -030037 * Version 0.01: First working version.
38 * It's required to blacklist AverMedia USB Radio
39 * in usbhid/hid-quirks.c
Alexey Klimov71f07d92009-02-05 08:58:31 -030040 * 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.
Alexey Klimov2aa72f32008-10-01 09:40:59 -030046 *
47 * Many things to do:
48 * - Correct power managment of device (suspend & resume)
Alexey Klimov2aa72f32008-10-01 09:40:59 -030049 * - Add code for scanning and smooth tuning
Alexey Klimov2aa72f32008-10-01 09:40:59 -030050 * - Add code for sensitivity value
51 * - Correct mistakes
52 * - In Japan another FREQ_MIN and FREQ_MAX
53 */
54
55/* kernel includes */
56#include <linux/kernel.h>
57#include <linux/module.h>
58#include <linux/init.h>
59#include <linux/slab.h>
60#include <linux/input.h>
61#include <linux/videodev2.h>
62#include <media/v4l2-common.h>
63#include <media/v4l2-ioctl.h>
64#include <linux/usb.h>
65#include <linux/version.h> /* for KERNEL_VERSION MACRO */
66
67/* driver and module definitions */
68#define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>"
69#define DRIVER_DESC "AverMedia MR 800 USB FM radio driver"
Alexey Klimov71f07d92009-02-05 08:58:31 -030070#define DRIVER_VERSION "0.10"
71#define RADIO_VERSION KERNEL_VERSION(0, 1, 0)
Alexey Klimov2aa72f32008-10-01 09:40:59 -030072
73MODULE_AUTHOR(DRIVER_AUTHOR);
74MODULE_DESCRIPTION(DRIVER_DESC);
75MODULE_LICENSE("GPL");
76
77#define USB_AMRADIO_VENDOR 0x07ca
78#define USB_AMRADIO_PRODUCT 0xb800
79
Alexey Klimove60b0222008-11-04 15:02:36 -030080/* dev_warn macro with driver name */
81#define MR800_DRIVER_NAME "radio-mr800"
82#define amradio_dev_warn(dev, fmt, arg...) \
83 dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
84
Alexey Klimov2aa72f32008-10-01 09:40:59 -030085/* Probably USB_TIMEOUT should be modified in module parameter */
86#define BUFFER_LENGTH 8
87#define USB_TIMEOUT 500
88
89/* Frequency limits in MHz -- these are European values. For Japanese
90devices, that would be 76 and 91. */
91#define FREQ_MIN 87.5
92#define FREQ_MAX 108.0
93#define FREQ_MUL 16000
94
Alexey Klimovdb821802009-02-05 08:53:02 -030095/*
96 * Commands that device should understand
97 * List isnt full and will be updated with implementation of new functions
98 */
Alexey Klimovf7c1a382009-02-05 08:54:17 -030099#define AMRADIO_SET_FREQ 0xa4
Alexey Klimovdb821802009-02-05 08:53:02 -0300100#define AMRADIO_SET_MUTE 0xab
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300101#define AMRADIO_SET_MONO 0xae
Alexey Klimovdb821802009-02-05 08:53:02 -0300102
103/* Comfortable defines for amradio_set_mute */
104#define AMRADIO_START 0x00
105#define AMRADIO_STOP 0x01
106
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300107/* Comfortable defines for amradio_set_stereo */
108#define WANT_STEREO 0x00
109#define WANT_MONO 0x01
110
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300111/* module parameter */
112static int radio_nr = -1;
113module_param(radio_nr, int, 0);
114MODULE_PARM_DESC(radio_nr, "Radio Nr");
115
116static struct v4l2_queryctrl radio_qctrl[] = {
117 {
118 .id = V4L2_CID_AUDIO_MUTE,
119 .name = "Mute",
120 .minimum = 0,
121 .maximum = 1,
122 .step = 1,
123 .default_value = 1,
124 .type = V4L2_CTRL_TYPE_BOOLEAN,
125 },
126/* HINT: the disabled controls are only here to satify kradio and such apps */
127 { .id = V4L2_CID_AUDIO_VOLUME,
128 .flags = V4L2_CTRL_FLAG_DISABLED,
129 },
130 {
131 .id = V4L2_CID_AUDIO_BALANCE,
132 .flags = V4L2_CTRL_FLAG_DISABLED,
133 },
134 {
135 .id = V4L2_CID_AUDIO_BASS,
136 .flags = V4L2_CTRL_FLAG_DISABLED,
137 },
138 {
139 .id = V4L2_CID_AUDIO_TREBLE,
140 .flags = V4L2_CTRL_FLAG_DISABLED,
141 },
142 {
143 .id = V4L2_CID_AUDIO_LOUDNESS,
144 .flags = V4L2_CTRL_FLAG_DISABLED,
145 },
146};
147
148static int usb_amradio_probe(struct usb_interface *intf,
149 const struct usb_device_id *id);
150static void usb_amradio_disconnect(struct usb_interface *intf);
Hans Verkuilbec43662008-12-30 06:58:20 -0300151static int usb_amradio_open(struct file *file);
152static int usb_amradio_close(struct file *file);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300153static int usb_amradio_suspend(struct usb_interface *intf,
154 pm_message_t message);
155static int usb_amradio_resume(struct usb_interface *intf);
156
157/* Data for one (physical) device */
158struct amradio_device {
159 /* reference to USB and video device */
160 struct usb_device *usbdev;
161 struct video_device *videodev;
162
163 unsigned char *buffer;
164 struct mutex lock; /* buffer locking */
165 int curfreq;
166 int stereo;
167 int users;
168 int removed;
169 int muted;
170};
171
172/* USB Device ID List */
173static struct usb_device_id usb_amradio_device_table[] = {
174 {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
175 USB_CLASS_HID, 0, 0) },
176 { } /* Terminating entry */
177};
178
179MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
180
181/* USB subsystem interface */
182static struct usb_driver usb_amradio_driver = {
Alexey Klimove60b0222008-11-04 15:02:36 -0300183 .name = MR800_DRIVER_NAME,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300184 .probe = usb_amradio_probe,
185 .disconnect = usb_amradio_disconnect,
186 .suspend = usb_amradio_suspend,
187 .resume = usb_amradio_resume,
188 .reset_resume = usb_amradio_resume,
189 .id_table = usb_amradio_device_table,
Alexey Klimovf2ce9172008-12-27 21:31:49 -0300190 .supports_autosuspend = 0,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300191};
192
Alexey Klimovdb821802009-02-05 08:53:02 -0300193/* switch on/off the radio. Send 8 bytes to device */
194static int amradio_set_mute(struct amradio_device *radio, char argument)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300195{
196 int retval;
197 int size;
198
Alexey Klimov34801302008-11-19 00:36:29 -0300199 /* safety check */
200 if (radio->removed)
201 return -EIO;
202
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300203 mutex_lock(&radio->lock);
204
205 radio->buffer[0] = 0x00;
206 radio->buffer[1] = 0x55;
207 radio->buffer[2] = 0xaa;
208 radio->buffer[3] = 0x00;
Alexey Klimovdb821802009-02-05 08:53:02 -0300209 radio->buffer[4] = AMRADIO_SET_MUTE;
210 radio->buffer[5] = argument;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300211 radio->buffer[6] = 0x00;
212 radio->buffer[7] = 0x00;
213
214 retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
215 (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
216
Alexey Klimove57458d2009-02-05 09:00:03 -0300217 if (retval < 0 || size != BUFFER_LENGTH) {
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300218 mutex_unlock(&radio->lock);
219 return retval;
220 }
221
Alexey Klimovdb821802009-02-05 08:53:02 -0300222 radio->muted = argument;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300223
Alexey Klimov7f03a582009-01-25 20:07:28 -0300224 mutex_unlock(&radio->lock);
225
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300226 return retval;
227}
228
229/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
230static int amradio_setfreq(struct amradio_device *radio, int freq)
231{
232 int retval;
233 int size;
Alexey Klimovf7c1a382009-02-05 08:54:17 -0300234 unsigned short freq_send = 0x10 + (freq >> 3) / 25;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300235
Alexey Klimov34801302008-11-19 00:36:29 -0300236 /* safety check */
237 if (radio->removed)
238 return -EIO;
239
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300240 mutex_lock(&radio->lock);
241
242 radio->buffer[0] = 0x00;
243 radio->buffer[1] = 0x55;
244 radio->buffer[2] = 0xaa;
245 radio->buffer[3] = 0x03;
Alexey Klimovf7c1a382009-02-05 08:54:17 -0300246 radio->buffer[4] = AMRADIO_SET_FREQ;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300247 radio->buffer[5] = 0x00;
248 radio->buffer[6] = 0x00;
249 radio->buffer[7] = 0x08;
250
251 retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
252 (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
253
Alexey Klimove57458d2009-02-05 09:00:03 -0300254 if (retval < 0 || size != BUFFER_LENGTH) {
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300255 mutex_unlock(&radio->lock);
256 return retval;
257 }
258
259 /* frequency is calculated from freq_send and placed in first 2 bytes */
260 radio->buffer[0] = (freq_send >> 8) & 0xff;
261 radio->buffer[1] = freq_send & 0xff;
262 radio->buffer[2] = 0x01;
263 radio->buffer[3] = 0x00;
264 radio->buffer[4] = 0x00;
265 /* 5 and 6 bytes of buffer already = 0x00 */
266 radio->buffer[7] = 0x00;
267
268 retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
269 (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
270
Alexey Klimove57458d2009-02-05 09:00:03 -0300271 if (retval < 0 || size != BUFFER_LENGTH) {
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300272 mutex_unlock(&radio->lock);
273 return retval;
274 }
275
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300276 mutex_unlock(&radio->lock);
277
278 return retval;
279}
280
281static int amradio_set_stereo(struct amradio_device *radio, char argument)
282{
283 int retval;
284 int size;
285
286 /* safety check */
287 if (radio->removed)
288 return -EIO;
289
290 mutex_lock(&radio->lock);
291
292 radio->buffer[0] = 0x00;
293 radio->buffer[1] = 0x55;
294 radio->buffer[2] = 0xaa;
295 radio->buffer[3] = 0x00;
296 radio->buffer[4] = AMRADIO_SET_MONO;
297 radio->buffer[5] = argument;
298 radio->buffer[6] = 0x00;
299 radio->buffer[7] = 0x00;
300
301 retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
302 (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
303
304 if (retval < 0 || size != BUFFER_LENGTH) {
305 radio->stereo = -1;
306 mutex_unlock(&radio->lock);
307 return retval;
308 }
309
310 radio->stereo = 1;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300311
Alexey Klimov7f03a582009-01-25 20:07:28 -0300312 mutex_unlock(&radio->lock);
313
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300314 return retval;
315}
316
Alexey Klimov71f07d92009-02-05 08:58:31 -0300317/* Handle unplugging the device.
318 * We call video_unregister_device in any case.
319 * The last function called in this procedure is
320 * usb_amradio_device_release.
321 */
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300322static void usb_amradio_disconnect(struct usb_interface *intf)
323{
324 struct amradio_device *radio = usb_get_intfdata(intf);
325
Alexey Klimovf4e90432008-12-27 21:30:34 -0300326 mutex_lock(&radio->lock);
Alexey Klimov34801302008-11-19 00:36:29 -0300327 radio->removed = 1;
Alexey Klimovf4e90432008-12-27 21:30:34 -0300328 mutex_unlock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300329
Alexey Klimovf4e90432008-12-27 21:30:34 -0300330 usb_set_intfdata(intf, NULL);
331 video_unregister_device(radio->videodev);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300332}
333
334/* vidioc_querycap - query device capabilities */
335static int vidioc_querycap(struct file *file, void *priv,
336 struct v4l2_capability *v)
337{
Alexey Klimovc7181cf2009-01-25 20:05:58 -0300338 struct amradio_device *radio = video_drvdata(file);
339
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300340 strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
341 strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
Alexey Klimovc7181cf2009-01-25 20:05:58 -0300342 usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300343 v->version = RADIO_VERSION;
344 v->capabilities = V4L2_CAP_TUNER;
345 return 0;
346}
347
348/* vidioc_g_tuner - get tuner attributes */
349static int vidioc_g_tuner(struct file *file, void *priv,
350 struct v4l2_tuner *v)
351{
352 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300353 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300354
Alexey Klimov34801302008-11-19 00:36:29 -0300355 /* safety check */
356 if (radio->removed)
357 return -EIO;
358
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300359 if (v->index > 0)
360 return -EINVAL;
361
362/* TODO: Add function which look is signal stereo or not
363 * amradio_getstat(radio);
364 */
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300365
366/* we call amradio_set_stereo to set radio->stereo
367 * Honestly, amradio_getstat should cover this in future and
368 * amradio_set_stereo shouldn't be here
369 */
370 retval = amradio_set_stereo(radio, WANT_STEREO);
371 if (retval < 0)
372 amradio_dev_warn(&radio->videodev->dev,
373 "set stereo failed\n");
374
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300375 strcpy(v->name, "FM");
376 v->type = V4L2_TUNER_RADIO;
377 v->rangelow = FREQ_MIN * FREQ_MUL;
378 v->rangehigh = FREQ_MAX * FREQ_MUL;
379 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
380 v->capability = V4L2_TUNER_CAP_LOW;
381 if (radio->stereo)
382 v->audmode = V4L2_TUNER_MODE_STEREO;
383 else
384 v->audmode = V4L2_TUNER_MODE_MONO;
385 v->signal = 0xffff; /* Can't get the signal strength, sad.. */
386 v->afc = 0; /* Don't know what is this */
387 return 0;
388}
389
390/* vidioc_s_tuner - set tuner attributes */
391static int vidioc_s_tuner(struct file *file, void *priv,
392 struct v4l2_tuner *v)
393{
Alexey Klimov34801302008-11-19 00:36:29 -0300394 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300395 int retval;
Alexey Klimov34801302008-11-19 00:36:29 -0300396
397 /* safety check */
398 if (radio->removed)
399 return -EIO;
400
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300401 if (v->index > 0)
402 return -EINVAL;
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300403
404 /* mono/stereo selector */
405 switch (v->audmode) {
406 case V4L2_TUNER_MODE_MONO:
407 retval = amradio_set_stereo(radio, WANT_MONO);
408 if (retval < 0)
409 amradio_dev_warn(&radio->videodev->dev,
410 "set mono failed\n");
411 break;
412 case V4L2_TUNER_MODE_STEREO:
413 retval = amradio_set_stereo(radio, WANT_STEREO);
414 if (retval < 0)
415 amradio_dev_warn(&radio->videodev->dev,
416 "set stereo failed\n");
417 break;
418 default:
419 return -EINVAL;
420 }
421
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300422 return 0;
423}
424
425/* vidioc_s_frequency - set tuner radio frequency */
426static int vidioc_s_frequency(struct file *file, void *priv,
427 struct v4l2_frequency *f)
428{
429 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimova5d69472009-02-05 08:48:43 -0300430 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300431
Alexey Klimov34801302008-11-19 00:36:29 -0300432 /* safety check */
433 if (radio->removed)
434 return -EIO;
435
Alexey Klimov52433bb2009-02-05 08:57:19 -0300436 mutex_lock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300437 radio->curfreq = f->frequency;
Alexey Klimov52433bb2009-02-05 08:57:19 -0300438 mutex_unlock(&radio->lock);
439
Alexey Klimova5d69472009-02-05 08:48:43 -0300440 retval = amradio_setfreq(radio, radio->curfreq);
441 if (retval < 0)
Alexey Klimove60b0222008-11-04 15:02:36 -0300442 amradio_dev_warn(&radio->videodev->dev,
443 "set frequency failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300444 return 0;
445}
446
447/* vidioc_g_frequency - get tuner radio frequency */
448static int vidioc_g_frequency(struct file *file, void *priv,
449 struct v4l2_frequency *f)
450{
451 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
452
Alexey Klimov34801302008-11-19 00:36:29 -0300453 /* safety check */
454 if (radio->removed)
455 return -EIO;
456
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300457 f->type = V4L2_TUNER_RADIO;
458 f->frequency = radio->curfreq;
459 return 0;
460}
461
462/* vidioc_queryctrl - enumerate control items */
463static int vidioc_queryctrl(struct file *file, void *priv,
464 struct v4l2_queryctrl *qc)
465{
466 int i;
467
468 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
469 if (qc->id && qc->id == radio_qctrl[i].id) {
Alexey Klimove60b0222008-11-04 15:02:36 -0300470 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300471 return 0;
472 }
473 }
474 return -EINVAL;
475}
476
477/* vidioc_g_ctrl - get the value of a control */
478static int vidioc_g_ctrl(struct file *file, void *priv,
479 struct v4l2_control *ctrl)
480{
481 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
482
Alexey Klimov34801302008-11-19 00:36:29 -0300483 /* safety check */
484 if (radio->removed)
485 return -EIO;
486
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300487 switch (ctrl->id) {
488 case V4L2_CID_AUDIO_MUTE:
489 ctrl->value = radio->muted;
490 return 0;
491 }
492 return -EINVAL;
493}
494
495/* vidioc_s_ctrl - set the value of a control */
496static int vidioc_s_ctrl(struct file *file, void *priv,
497 struct v4l2_control *ctrl)
498{
499 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimova5d69472009-02-05 08:48:43 -0300500 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300501
Alexey Klimov34801302008-11-19 00:36:29 -0300502 /* safety check */
503 if (radio->removed)
504 return -EIO;
505
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300506 switch (ctrl->id) {
507 case V4L2_CID_AUDIO_MUTE:
508 if (ctrl->value) {
Alexey Klimovdb821802009-02-05 08:53:02 -0300509 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimova5d69472009-02-05 08:48:43 -0300510 if (retval < 0) {
Alexey Klimove60b0222008-11-04 15:02:36 -0300511 amradio_dev_warn(&radio->videodev->dev,
512 "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300513 return -1;
514 }
515 } else {
Alexey Klimovdb821802009-02-05 08:53:02 -0300516 retval = amradio_set_mute(radio, AMRADIO_START);
Alexey Klimova5d69472009-02-05 08:48:43 -0300517 if (retval < 0) {
Alexey Klimove60b0222008-11-04 15:02:36 -0300518 amradio_dev_warn(&radio->videodev->dev,
519 "amradio_start failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300520 return -1;
521 }
522 }
523 return 0;
524 }
525 return -EINVAL;
526}
527
528/* vidioc_g_audio - get audio attributes */
529static int vidioc_g_audio(struct file *file, void *priv,
530 struct v4l2_audio *a)
531{
532 if (a->index > 1)
533 return -EINVAL;
534
535 strcpy(a->name, "Radio");
536 a->capability = V4L2_AUDCAP_STEREO;
537 return 0;
538}
539
540/* vidioc_s_audio - set audio attributes */
541static int vidioc_s_audio(struct file *file, void *priv,
542 struct v4l2_audio *a)
543{
544 if (a->index != 0)
545 return -EINVAL;
546 return 0;
547}
548
549/* vidioc_g_input - get input */
550static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
551{
552 *i = 0;
553 return 0;
554}
555
556/* vidioc_s_input - set input */
557static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
558{
559 if (i != 0)
560 return -EINVAL;
561 return 0;
562}
563
564/* open device - amradio_start() and amradio_setfreq() */
Hans Verkuilbec43662008-12-30 06:58:20 -0300565static int usb_amradio_open(struct file *file)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300566{
567 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimova5d69472009-02-05 08:48:43 -0300568 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300569
Alexey Klimov0fabb782008-10-19 23:56:23 -0300570 lock_kernel();
571
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300572 radio->users = 1;
573 radio->muted = 1;
574
Alexey Klimovdb821802009-02-05 08:53:02 -0300575 retval = amradio_set_mute(radio, AMRADIO_START);
Alexey Klimova5d69472009-02-05 08:48:43 -0300576 if (retval < 0) {
Alexey Klimove60b0222008-11-04 15:02:36 -0300577 amradio_dev_warn(&radio->videodev->dev,
578 "radio did not start up properly\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300579 radio->users = 0;
Alexey Klimov0fabb782008-10-19 23:56:23 -0300580 unlock_kernel();
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300581 return -EIO;
582 }
Alexey Klimova5d69472009-02-05 08:48:43 -0300583
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300584 retval = amradio_set_stereo(radio, WANT_STEREO);
585 if (retval < 0)
586 amradio_dev_warn(&radio->videodev->dev,
587 "set stereo failed\n");
588
Alexey Klimova5d69472009-02-05 08:48:43 -0300589 retval = amradio_setfreq(radio, radio->curfreq);
590 if (retval < 0)
Alexey Klimove60b0222008-11-04 15:02:36 -0300591 amradio_dev_warn(&radio->videodev->dev,
592 "set frequency failed\n");
Alexey Klimov0fabb782008-10-19 23:56:23 -0300593
594 unlock_kernel();
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300595 return 0;
596}
597
Alexey Klimovf4e90432008-12-27 21:30:34 -0300598/*close device */
Hans Verkuilbec43662008-12-30 06:58:20 -0300599static int usb_amradio_close(struct file *file)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300600{
601 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimov34801302008-11-19 00:36:29 -0300602 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300603
604 if (!radio)
605 return -ENODEV;
Alexey Klimov34801302008-11-19 00:36:29 -0300606
Alexey Klimov52433bb2009-02-05 08:57:19 -0300607 mutex_lock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300608 radio->users = 0;
Alexey Klimov52433bb2009-02-05 08:57:19 -0300609 mutex_unlock(&radio->lock);
Alexey Klimov34801302008-11-19 00:36:29 -0300610
Alexey Klimovf4e90432008-12-27 21:30:34 -0300611 if (!radio->removed) {
Alexey Klimovdb821802009-02-05 08:53:02 -0300612 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimov34801302008-11-19 00:36:29 -0300613 if (retval < 0)
614 amradio_dev_warn(&radio->videodev->dev,
615 "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300616 }
Alexey Klimov34801302008-11-19 00:36:29 -0300617
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300618 return 0;
619}
620
621/* Suspend device - stop device. Need to be checked and fixed */
622static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
623{
624 struct amradio_device *radio = usb_get_intfdata(intf);
Alexey Klimova5d69472009-02-05 08:48:43 -0300625 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300626
Alexey Klimovdb821802009-02-05 08:53:02 -0300627 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimova5d69472009-02-05 08:48:43 -0300628 if (retval < 0)
Alexey Klimove60b0222008-11-04 15:02:36 -0300629 dev_warn(&intf->dev, "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300630
Alexey Klimove60b0222008-11-04 15:02:36 -0300631 dev_info(&intf->dev, "going into suspend..\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300632
633 return 0;
634}
635
636/* Resume device - start device. Need to be checked and fixed */
637static int usb_amradio_resume(struct usb_interface *intf)
638{
639 struct amradio_device *radio = usb_get_intfdata(intf);
Alexey Klimova5d69472009-02-05 08:48:43 -0300640 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300641
Alexey Klimovdb821802009-02-05 08:53:02 -0300642 retval = amradio_set_mute(radio, AMRADIO_START);
Alexey Klimova5d69472009-02-05 08:48:43 -0300643 if (retval < 0)
Alexey Klimove60b0222008-11-04 15:02:36 -0300644 dev_warn(&intf->dev, "amradio_start failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300645
Alexey Klimove60b0222008-11-04 15:02:36 -0300646 dev_info(&intf->dev, "coming out of suspend..\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300647
648 return 0;
649}
650
651/* File system interface */
Hans Verkuilbec43662008-12-30 06:58:20 -0300652static const struct v4l2_file_operations usb_amradio_fops = {
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300653 .owner = THIS_MODULE,
654 .open = usb_amradio_open,
655 .release = usb_amradio_close,
656 .ioctl = video_ioctl2,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300657};
658
659static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
660 .vidioc_querycap = vidioc_querycap,
661 .vidioc_g_tuner = vidioc_g_tuner,
662 .vidioc_s_tuner = vidioc_s_tuner,
663 .vidioc_g_frequency = vidioc_g_frequency,
664 .vidioc_s_frequency = vidioc_s_frequency,
665 .vidioc_queryctrl = vidioc_queryctrl,
666 .vidioc_g_ctrl = vidioc_g_ctrl,
667 .vidioc_s_ctrl = vidioc_s_ctrl,
668 .vidioc_g_audio = vidioc_g_audio,
669 .vidioc_s_audio = vidioc_s_audio,
670 .vidioc_g_input = vidioc_g_input,
671 .vidioc_s_input = vidioc_s_input,
672};
673
Alexey Klimovf4e90432008-12-27 21:30:34 -0300674static void usb_amradio_device_release(struct video_device *videodev)
675{
676 struct amradio_device *radio = video_get_drvdata(videodev);
677
678 /* we call v4l to free radio->videodev */
679 video_device_release(videodev);
680
681 /* free rest memory */
682 kfree(radio->buffer);
683 kfree(radio);
684}
685
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300686/* V4L2 interface */
687static struct video_device amradio_videodev_template = {
688 .name = "AverMedia MR 800 USB FM Radio",
689 .fops = &usb_amradio_fops,
690 .ioctl_ops = &usb_amradio_ioctl_ops,
Alexey Klimovf4e90432008-12-27 21:30:34 -0300691 .release = usb_amradio_device_release,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300692};
693
Alexey Klimova5d69472009-02-05 08:48:43 -0300694/* check if the device is present and register with v4l and usb if it is */
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300695static int usb_amradio_probe(struct usb_interface *intf,
696 const struct usb_device_id *id)
697{
698 struct amradio_device *radio;
Alexey Klimova5d69472009-02-05 08:48:43 -0300699 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300700
701 radio = kmalloc(sizeof(struct amradio_device), GFP_KERNEL);
702
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300703 if (!radio) {
704 dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300705 return -ENOMEM;
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300706 }
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300707
708 radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
709
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300710 if (!radio->buffer) {
711 dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300712 kfree(radio);
713 return -ENOMEM;
714 }
715
716 radio->videodev = video_device_alloc();
717
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300718 if (!radio->videodev) {
719 dev_err(&intf->dev, "video_device_alloc failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300720 kfree(radio->buffer);
721 kfree(radio);
722 return -ENOMEM;
723 }
724
725 memcpy(radio->videodev, &amradio_videodev_template,
726 sizeof(amradio_videodev_template));
727
728 radio->removed = 0;
729 radio->users = 0;
730 radio->usbdev = interface_to_usbdev(intf);
731 radio->curfreq = 95.16 * FREQ_MUL;
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300732 radio->stereo = -1;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300733
734 mutex_init(&radio->lock);
735
736 video_set_drvdata(radio->videodev, radio);
Alexey Klimova5d69472009-02-05 08:48:43 -0300737 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
738 if (retval < 0) {
Alexey Klimov65c51dc2009-02-05 08:49:58 -0300739 dev_err(&intf->dev, "could not register video device\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300740 video_device_release(radio->videodev);
741 kfree(radio->buffer);
742 kfree(radio);
743 return -EIO;
744 }
745
746 usb_set_intfdata(intf, radio);
747 return 0;
748}
749
750static int __init amradio_init(void)
751{
752 int retval = usb_register(&usb_amradio_driver);
753
Alexey Klimove60b0222008-11-04 15:02:36 -0300754 pr_info(KBUILD_MODNAME
755 ": version " DRIVER_VERSION " " DRIVER_DESC "\n");
756
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300757 if (retval)
Alexey Klimove60b0222008-11-04 15:02:36 -0300758 pr_err(KBUILD_MODNAME
759 ": usb_register failed. Error number %d\n", retval);
760
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300761 return retval;
762}
763
764static void __exit amradio_exit(void)
765{
766 usb_deregister(&usb_amradio_driver);
767}
768
769module_init(amradio_init);
770module_exit(amradio_exit);
771