blob: dd36ba0baab34b58697e4d454dfc99b3fe1cd293 [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 Klimovb4662482009-04-03 18:45:27 -030046 * Version 0.11: Converted to v4l2_device.
Alexey Klimov2aa72f32008-10-01 09:40:59 -030047 *
48 * Many things to do:
Uwe Kleine-Koenig3dbda772009-07-23 08:31:31 +020049 * - Correct power management of device (suspend & resume)
Alexey Klimov2aa72f32008-10-01 09:40:59 -030050 * - Add code for scanning and smooth tuning
Alexey Klimov2aa72f32008-10-01 09:40:59 -030051 * - 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>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040061#include <linux/smp_lock.h>
Alexey Klimov2aa72f32008-10-01 09:40:59 -030062#include <linux/input.h>
63#include <linux/videodev2.h>
Alexey Klimovb4662482009-04-03 18:45:27 -030064#include <media/v4l2-device.h>
Alexey Klimov2aa72f32008-10-01 09:40:59 -030065#include <media/v4l2-ioctl.h>
66#include <linux/usb.h>
67#include <linux/version.h> /* for KERNEL_VERSION MACRO */
Alessio Igor Bogani24c44d82009-05-12 17:39:27 -030068#include <linux/mutex.h>
Alexey Klimov2aa72f32008-10-01 09:40:59 -030069
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"
Alexey Klimovb4662482009-04-03 18:45:27 -030073#define DRIVER_VERSION "0.11"
74#define RADIO_VERSION KERNEL_VERSION(0, 1, 1)
Alexey Klimov2aa72f32008-10-01 09:40:59 -030075
76MODULE_AUTHOR(DRIVER_AUTHOR);
77MODULE_DESCRIPTION(DRIVER_DESC);
78MODULE_LICENSE("GPL");
79
80#define USB_AMRADIO_VENDOR 0x07ca
81#define USB_AMRADIO_PRODUCT 0xb800
82
Alexey Klimove60b0222008-11-04 15:02:36 -030083/* 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
Alexey Klimov2aa72f32008-10-01 09:40:59 -030088/* 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
93devices, that would be 76 and 91. */
94#define FREQ_MIN 87.5
95#define FREQ_MAX 108.0
96#define FREQ_MUL 16000
97
Alexey Klimovdb821802009-02-05 08:53:02 -030098/*
99 * Commands that device should understand
100 * List isnt full and will be updated with implementation of new functions
101 */
Alexey Klimovf7c1a382009-02-05 08:54:17 -0300102#define AMRADIO_SET_FREQ 0xa4
Alexey Klimovdb821802009-02-05 08:53:02 -0300103#define AMRADIO_SET_MUTE 0xab
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300104#define AMRADIO_SET_MONO 0xae
Alexey Klimovdb821802009-02-05 08:53:02 -0300105
106/* Comfortable defines for amradio_set_mute */
107#define AMRADIO_START 0x00
108#define AMRADIO_STOP 0x01
109
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300110/* Comfortable defines for amradio_set_stereo */
111#define WANT_STEREO 0x00
112#define WANT_MONO 0x01
113
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300114/* module parameter */
115static int radio_nr = -1;
116module_param(radio_nr, int, 0);
117MODULE_PARM_DESC(radio_nr, "Radio Nr");
118
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300119static int usb_amradio_probe(struct usb_interface *intf,
120 const struct usb_device_id *id);
121static void usb_amradio_disconnect(struct usb_interface *intf);
Hans Verkuilbec43662008-12-30 06:58:20 -0300122static int usb_amradio_open(struct file *file);
123static int usb_amradio_close(struct file *file);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300124static int usb_amradio_suspend(struct usb_interface *intf,
125 pm_message_t message);
126static int usb_amradio_resume(struct usb_interface *intf);
127
128/* Data for one (physical) device */
129struct amradio_device {
130 /* reference to USB and video device */
131 struct usb_device *usbdev;
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300132 struct video_device videodev;
Alexey Klimovb4662482009-04-03 18:45:27 -0300133 struct v4l2_device v4l2_dev;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300134
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 */
145static 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
151MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
152
153/* USB subsystem interface */
154static struct usb_driver usb_amradio_driver = {
Alexey Klimove60b0222008-11-04 15:02:36 -0300155 .name = MR800_DRIVER_NAME,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300156 .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,
Alexey Klimovf2ce9172008-12-27 21:31:49 -0300162 .supports_autosuspend = 0,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300163};
164
Alexey Klimovdb821802009-02-05 08:53:02 -0300165/* switch on/off the radio. Send 8 bytes to device */
166static int amradio_set_mute(struct amradio_device *radio, char argument)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300167{
168 int retval;
169 int size;
170
David Ellingsworth4aebc282009-09-22 21:22:19 -0300171 BUG_ON(!mutex_is_locked(&radio->lock));
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300172
173 radio->buffer[0] = 0x00;
174 radio->buffer[1] = 0x55;
175 radio->buffer[2] = 0xaa;
176 radio->buffer[3] = 0x00;
Alexey Klimovdb821802009-02-05 08:53:02 -0300177 radio->buffer[4] = AMRADIO_SET_MUTE;
178 radio->buffer[5] = argument;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300179 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
David Ellingsworth4aebc282009-09-22 21:22:19 -0300185 if (retval < 0 || size != BUFFER_LENGTH)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300186 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300187
Alexey Klimovdb821802009-02-05 08:53:02 -0300188 radio->muted = argument;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300189
190 return retval;
191}
192
193/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
194static int amradio_setfreq(struct amradio_device *radio, int freq)
195{
196 int retval;
197 int size;
Alexey Klimovf7c1a382009-02-05 08:54:17 -0300198 unsigned short freq_send = 0x10 + (freq >> 3) / 25;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300199
David Ellingsworth4aebc282009-09-22 21:22:19 -0300200 BUG_ON(!mutex_is_locked(&radio->lock));
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300201
202 radio->buffer[0] = 0x00;
203 radio->buffer[1] = 0x55;
204 radio->buffer[2] = 0xaa;
205 radio->buffer[3] = 0x03;
Alexey Klimovf7c1a382009-02-05 08:54:17 -0300206 radio->buffer[4] = AMRADIO_SET_FREQ;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300207 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
David Ellingsworth4aebc282009-09-22 21:22:19 -0300214 if (retval < 0 || size != BUFFER_LENGTH)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300215 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300216
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
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300229 return retval;
230}
231
232static int amradio_set_stereo(struct amradio_device *radio, char argument)
233{
234 int retval;
235 int size;
236
David Ellingsworth4aebc282009-09-22 21:22:19 -0300237 BUG_ON(!mutex_is_locked(&radio->lock));
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300238
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;
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300253 return retval;
254 }
255
256 radio->stereo = 1;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300257
258 return retval;
259}
260
Alexey Klimov71f07d92009-02-05 08:58:31 -0300261/* 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 */
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300266static void usb_amradio_disconnect(struct usb_interface *intf)
267{
268 struct amradio_device *radio = usb_get_intfdata(intf);
269
Alexey Klimovf4e90432008-12-27 21:30:34 -0300270 mutex_lock(&radio->lock);
Alexey Klimov34801302008-11-19 00:36:29 -0300271 radio->removed = 1;
Alexey Klimovf4e90432008-12-27 21:30:34 -0300272 mutex_unlock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300273
Alexey Klimovf4e90432008-12-27 21:30:34 -0300274 usb_set_intfdata(intf, NULL);
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300275 video_unregister_device(&radio->videodev);
Alexey Klimovb4662482009-04-03 18:45:27 -0300276 v4l2_device_disconnect(&radio->v4l2_dev);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300277}
278
279/* vidioc_querycap - query device capabilities */
280static int vidioc_querycap(struct file *file, void *priv,
281 struct v4l2_capability *v)
282{
Alexey Klimovc7181cf2009-01-25 20:05:58 -0300283 struct amradio_device *radio = video_drvdata(file);
284
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300285 strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
286 strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
Alexey Klimovc7181cf2009-01-25 20:05:58 -0300287 usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300288 v->version = RADIO_VERSION;
289 v->capabilities = V4L2_CAP_TUNER;
290 return 0;
291}
292
293/* vidioc_g_tuner - get tuner attributes */
294static 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));
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300298 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300299
David Ellingsworth4aebc282009-09-22 21:22:19 -0300300 mutex_lock(&radio->lock);
Alexey Klimov34801302008-11-19 00:36:29 -0300301
David Ellingsworth4aebc282009-09-22 21:22:19 -0300302 /* safety check */
303 if (radio->removed) {
304 retval = -EIO;
305 goto unlock;
306 }
307
308 if (v->index > 0) {
309 retval = -EINVAL;
310 goto unlock;
311 }
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300312
313/* TODO: Add function which look is signal stereo or not
314 * amradio_getstat(radio);
315 */
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300316
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)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300323 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300324 "set stereo failed\n");
325
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300326 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 */
David Ellingsworth4aebc282009-09-22 21:22:19 -0300338
339unlock:
340 mutex_unlock(&radio->lock);
341 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300342}
343
344/* vidioc_s_tuner - set tuner attributes */
345static int vidioc_s_tuner(struct file *file, void *priv,
346 struct v4l2_tuner *v)
347{
Alexey Klimov34801302008-11-19 00:36:29 -0300348 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300349 int retval;
Alexey Klimov34801302008-11-19 00:36:29 -0300350
David Ellingsworth4aebc282009-09-22 21:22:19 -0300351 mutex_lock(&radio->lock);
Alexey Klimov34801302008-11-19 00:36:29 -0300352
David Ellingsworth4aebc282009-09-22 21:22:19 -0300353 /* safety check */
354 if (radio->removed) {
355 retval = -EIO;
356 goto unlock;
357 }
358
359 if (v->index > 0) {
360 retval = -EINVAL;
361 goto unlock;
362 }
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300363
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)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300369 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300370 "set mono failed\n");
371 break;
372 case V4L2_TUNER_MODE_STEREO:
373 retval = amradio_set_stereo(radio, WANT_STEREO);
374 if (retval < 0)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300375 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300376 "set stereo failed\n");
377 break;
378 default:
David Ellingsworth4aebc282009-09-22 21:22:19 -0300379 retval = -EINVAL;
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300380 }
381
David Ellingsworth4aebc282009-09-22 21:22:19 -0300382unlock:
383 mutex_unlock(&radio->lock);
384 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300385}
386
387/* vidioc_s_frequency - set tuner radio frequency */
388static 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));
Alexey Klimova5d69472009-02-05 08:48:43 -0300392 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300393
Alexey Klimov52433bb2009-02-05 08:57:19 -0300394 mutex_lock(&radio->lock);
David Ellingsworth4aebc282009-09-22 21:22:19 -0300395
396 /* safety check */
397 if (radio->removed) {
398 retval = -EIO;
399 goto unlock;
400 }
401
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300402 radio->curfreq = f->frequency;
Alexey Klimov52433bb2009-02-05 08:57:19 -0300403
Alexey Klimova5d69472009-02-05 08:48:43 -0300404 retval = amradio_setfreq(radio, radio->curfreq);
405 if (retval < 0)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300406 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimove60b0222008-11-04 15:02:36 -0300407 "set frequency failed\n");
David Ellingsworth4aebc282009-09-22 21:22:19 -0300408
409unlock:
410 mutex_unlock(&radio->lock);
411 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300412}
413
414/* vidioc_g_frequency - get tuner radio frequency */
415static 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));
David Ellingsworth4aebc282009-09-22 21:22:19 -0300419 int retval = 0;
420
421 mutex_lock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300422
Alexey Klimov34801302008-11-19 00:36:29 -0300423 /* safety check */
David Ellingsworth4aebc282009-09-22 21:22:19 -0300424 if (radio->removed) {
425 retval = -EIO;
426 goto unlock;
427 }
Alexey Klimov34801302008-11-19 00:36:29 -0300428
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300429 f->type = V4L2_TUNER_RADIO;
430 f->frequency = radio->curfreq;
David Ellingsworth4aebc282009-09-22 21:22:19 -0300431
432unlock:
433 mutex_unlock(&radio->lock);
434 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300435}
436
437/* vidioc_queryctrl - enumerate control items */
438static int vidioc_queryctrl(struct file *file, void *priv,
439 struct v4l2_queryctrl *qc)
440{
Alexey Klimovb4662482009-04-03 18:45:27 -0300441 switch (qc->id) {
442 case V4L2_CID_AUDIO_MUTE:
443 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300444 }
Alexey Klimovb4662482009-04-03 18:45:27 -0300445
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300446 return -EINVAL;
447}
448
449/* vidioc_g_ctrl - get the value of a control */
450static 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));
David Ellingsworth4aebc282009-09-22 21:22:19 -0300454 int retval = -EINVAL;
455
456 mutex_lock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300457
Alexey Klimov34801302008-11-19 00:36:29 -0300458 /* safety check */
David Ellingsworth4aebc282009-09-22 21:22:19 -0300459 if (radio->removed) {
460 retval = -EIO;
461 goto unlock;
462 }
Alexey Klimov34801302008-11-19 00:36:29 -0300463
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300464 switch (ctrl->id) {
465 case V4L2_CID_AUDIO_MUTE:
466 ctrl->value = radio->muted;
David Ellingsworth4aebc282009-09-22 21:22:19 -0300467 retval = 0;
468 break;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300469 }
David Ellingsworth4aebc282009-09-22 21:22:19 -0300470
471unlock:
472 mutex_unlock(&radio->lock);
473 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300474}
475
476/* vidioc_s_ctrl - set the value of a control */
477static 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));
David Ellingsworth4aebc282009-09-22 21:22:19 -0300481 int retval = -EINVAL;
482
483 mutex_lock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300484
Alexey Klimov34801302008-11-19 00:36:29 -0300485 /* safety check */
David Ellingsworth4aebc282009-09-22 21:22:19 -0300486 if (radio->removed) {
487 retval = -EIO;
488 goto unlock;
489 }
Alexey Klimov34801302008-11-19 00:36:29 -0300490
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300491 switch (ctrl->id) {
492 case V4L2_CID_AUDIO_MUTE:
493 if (ctrl->value) {
Alexey Klimovdb821802009-02-05 08:53:02 -0300494 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimova5d69472009-02-05 08:48:43 -0300495 if (retval < 0) {
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300496 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimove60b0222008-11-04 15:02:36 -0300497 "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300498 }
499 } else {
Alexey Klimovdb821802009-02-05 08:53:02 -0300500 retval = amradio_set_mute(radio, AMRADIO_START);
Alexey Klimova5d69472009-02-05 08:48:43 -0300501 if (retval < 0) {
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300502 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimove60b0222008-11-04 15:02:36 -0300503 "amradio_start failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300504 }
505 }
David Ellingsworth4aebc282009-09-22 21:22:19 -0300506 break;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300507 }
David Ellingsworth4aebc282009-09-22 21:22:19 -0300508
509unlock:
510 mutex_unlock(&radio->lock);
511 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300512}
513
514/* vidioc_g_audio - get audio attributes */
515static 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 */
527static 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 */
536static 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 */
543static 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() */
Hans Verkuilbec43662008-12-30 06:58:20 -0300551static int usb_amradio_open(struct file *file)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300552{
553 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
David Ellingsworth4aebc282009-09-22 21:22:19 -0300554 int retval = 0;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300555
David Ellingsworth4aebc282009-09-22 21:22:19 -0300556 mutex_lock(&radio->lock);
557
558 if (radio->removed) {
559 retval = -EIO;
560 goto unlock;
561 }
Alexey Klimov0fabb782008-10-19 23:56:23 -0300562
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300563 radio->users = 1;
564 radio->muted = 1;
565
Alexey Klimovdb821802009-02-05 08:53:02 -0300566 retval = amradio_set_mute(radio, AMRADIO_START);
Alexey Klimova5d69472009-02-05 08:48:43 -0300567 if (retval < 0) {
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300568 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimove60b0222008-11-04 15:02:36 -0300569 "radio did not start up properly\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300570 radio->users = 0;
David Ellingsworth4aebc282009-09-22 21:22:19 -0300571 goto unlock;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300572 }
Alexey Klimova5d69472009-02-05 08:48:43 -0300573
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300574 retval = amradio_set_stereo(radio, WANT_STEREO);
575 if (retval < 0)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300576 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300577 "set stereo failed\n");
578
Alexey Klimova5d69472009-02-05 08:48:43 -0300579 retval = amradio_setfreq(radio, radio->curfreq);
580 if (retval < 0)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300581 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimove60b0222008-11-04 15:02:36 -0300582 "set frequency failed\n");
Alexey Klimov0fabb782008-10-19 23:56:23 -0300583
David Ellingsworth4aebc282009-09-22 21:22:19 -0300584unlock:
585 mutex_unlock(&radio->lock);
586 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300587}
588
Alexey Klimovf4e90432008-12-27 21:30:34 -0300589/*close device */
Hans Verkuilbec43662008-12-30 06:58:20 -0300590static int usb_amradio_close(struct file *file)
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300591{
592 struct amradio_device *radio = video_get_drvdata(video_devdata(file));
David Ellingsworth4aebc282009-09-22 21:22:19 -0300593 int retval = 0;
Alexey Klimov34801302008-11-19 00:36:29 -0300594
Alexey Klimov52433bb2009-02-05 08:57:19 -0300595 mutex_lock(&radio->lock);
David Ellingsworth4aebc282009-09-22 21:22:19 -0300596
597 if (radio->removed) {
598 retval = -EIO;
599 goto unlock;
600 }
601
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300602 radio->users = 0;
Alexey Klimov34801302008-11-19 00:36:29 -0300603
Alexey Klimovf4e90432008-12-27 21:30:34 -0300604 if (!radio->removed) {
Alexey Klimovdb821802009-02-05 08:53:02 -0300605 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimov34801302008-11-19 00:36:29 -0300606 if (retval < 0)
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300607 amradio_dev_warn(&radio->videodev.dev,
Alexey Klimov34801302008-11-19 00:36:29 -0300608 "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300609 }
Alexey Klimov34801302008-11-19 00:36:29 -0300610
David Ellingsworth4aebc282009-09-22 21:22:19 -0300611unlock:
612 mutex_unlock(&radio->lock);
613 return retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300614}
615
616/* Suspend device - stop device. Need to be checked and fixed */
617static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
618{
619 struct amradio_device *radio = usb_get_intfdata(intf);
Alexey Klimova5d69472009-02-05 08:48:43 -0300620 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300621
David Ellingsworth4aebc282009-09-22 21:22:19 -0300622 mutex_lock(&radio->lock);
623
Alexey Klimovdb821802009-02-05 08:53:02 -0300624 retval = amradio_set_mute(radio, AMRADIO_STOP);
Alexey Klimova5d69472009-02-05 08:48:43 -0300625 if (retval < 0)
Alexey Klimove60b0222008-11-04 15:02:36 -0300626 dev_warn(&intf->dev, "amradio_stop failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300627
Alexey Klimove60b0222008-11-04 15:02:36 -0300628 dev_info(&intf->dev, "going into suspend..\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300629
David Ellingsworth4aebc282009-09-22 21:22:19 -0300630 mutex_unlock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300631 return 0;
632}
633
634/* Resume device - start device. Need to be checked and fixed */
635static int usb_amradio_resume(struct usb_interface *intf)
636{
637 struct amradio_device *radio = usb_get_intfdata(intf);
Alexey Klimova5d69472009-02-05 08:48:43 -0300638 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300639
David Ellingsworth4aebc282009-09-22 21:22:19 -0300640 mutex_lock(&radio->lock);
641
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
David Ellingsworth4aebc282009-09-22 21:22:19 -0300648 mutex_unlock(&radio->lock);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300649 return 0;
650}
651
652/* File system interface */
Hans Verkuilbec43662008-12-30 06:58:20 -0300653static const struct v4l2_file_operations usb_amradio_fops = {
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300654 .owner = THIS_MODULE,
655 .open = usb_amradio_open,
656 .release = usb_amradio_close,
657 .ioctl = video_ioctl2,
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300658};
659
660static 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
Alexey Klimovb4662482009-04-03 18:45:27 -0300675static void usb_amradio_video_device_release(struct video_device *videodev)
Alexey Klimovf4e90432008-12-27 21:30:34 -0300676{
677 struct amradio_device *radio = video_get_drvdata(videodev);
678
Alexey Klimovb4662482009-04-03 18:45:27 -0300679 v4l2_device_unregister(&radio->v4l2_dev);
680
Alexey Klimovf4e90432008-12-27 21:30:34 -0300681 /* free rest memory */
682 kfree(radio->buffer);
683 kfree(radio);
684}
685
Alexey Klimova5d69472009-02-05 08:48:43 -0300686/* check if the device is present and register with v4l and usb if it is */
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300687static int usb_amradio_probe(struct usb_interface *intf,
688 const struct usb_device_id *id)
689{
690 struct amradio_device *radio;
Alexey Klimovb4662482009-04-03 18:45:27 -0300691 struct v4l2_device *v4l2_dev;
Alexey Klimova5d69472009-02-05 08:48:43 -0300692 int retval;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300693
Alexey Klimovb4662482009-04-03 18:45:27 -0300694 radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300695
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300696 if (!radio) {
697 dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300698 return -ENOMEM;
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300699 }
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300700
701 radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
702
Alexey Klimov8edafcc2009-02-05 08:51:51 -0300703 if (!radio->buffer) {
704 dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300705 kfree(radio);
706 return -ENOMEM;
707 }
708
Alexey Klimovb4662482009-04-03 18:45:27 -0300709 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
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300718 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;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300724
725 radio->removed = 0;
726 radio->users = 0;
727 radio->usbdev = interface_to_usbdev(intf);
728 radio->curfreq = 95.16 * FREQ_MUL;
Alexey Klimov1bb16d72009-02-05 08:56:07 -0300729 radio->stereo = -1;
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300730
731 mutex_init(&radio->lock);
732
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300733 video_set_drvdata(&radio->videodev, radio);
Alexey Klimovb4662482009-04-03 18:45:27 -0300734
David Ellingsworth7a7d92e2009-09-22 21:37:30 -0300735 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
736 radio_nr);
Alexey Klimova5d69472009-02-05 08:48:43 -0300737 if (retval < 0) {
Alexey Klimov65c51dc2009-02-05 08:49:58 -0300738 dev_err(&intf->dev, "could not register video device\n");
Alexey Klimovb4662482009-04-03 18:45:27 -0300739 v4l2_device_unregister(v4l2_dev);
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300740 kfree(radio->buffer);
741 kfree(radio);
742 return -EIO;
743 }
744
745 usb_set_intfdata(intf, radio);
746 return 0;
747}
748
749static int __init amradio_init(void)
750{
751 int retval = usb_register(&usb_amradio_driver);
752
Alexey Klimove60b0222008-11-04 15:02:36 -0300753 pr_info(KBUILD_MODNAME
754 ": version " DRIVER_VERSION " " DRIVER_DESC "\n");
755
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300756 if (retval)
Alexey Klimove60b0222008-11-04 15:02:36 -0300757 pr_err(KBUILD_MODNAME
758 ": usb_register failed. Error number %d\n", retval);
759
Alexey Klimov2aa72f32008-10-01 09:40:59 -0300760 return retval;
761}
762
763static void __exit amradio_exit(void)
764{
765 usb_deregister(&usb_amradio_driver);
766}
767
768module_init(amradio_init);
769module_exit(amradio_exit);
770