Commit | Line | Data |
---|---|---|
2aa72f3b AK |
1 | /* |
2 | * A driver for the AverMedia MR 800 USB FM radio. This device plugs | |
3 | * into both the USB and an analog audio input, so this thing | |
4 | * only deals with initialization and frequency setting, the | |
5 | * audio data has to be handled by a sound driver. | |
6 | * | |
7 | * Copyright (c) 2008 Alexey Klimov <klimov.linux@gmail.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* | |
71f07d94 | 25 | * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c |
2aa72f3b AK |
26 | * |
27 | * When work was looked pretty good, i discover this: | |
28 | * http://av-usbradio.sourceforge.net/index.php | |
29 | * http://sourceforge.net/projects/av-usbradio/ | |
30 | * Latest release of theirs project was in 2005. | |
31 | * Probably, this driver could be improved trough using their | |
32 | * achievements (specifications given). | |
71f07d94 AK |
33 | * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio |
34 | * in 2007. He allowed to use his driver to improve current mr800 radio driver. | |
35 | * http://kerneltrap.org/mailarchive/linux-usb-devel/2007/10/11/342492 | |
2aa72f3b | 36 | * |
2aa72f3b AK |
37 | * Version 0.01: First working version. |
38 | * It's required to blacklist AverMedia USB Radio | |
39 | * in usbhid/hid-quirks.c | |
71f07d94 AK |
40 | * Version 0.10: A lot of cleanups and fixes: unpluging the device, |
41 | * few mutex locks were added, codinstyle issues, etc. | |
42 | * Added stereo support. Thanks to | |
43 | * Douglas Schilling Landgraf <dougsland@gmail.com> and | |
44 | * David Ellingsworth <david@identd.dyndns.org> | |
45 | * for discussion, help and support. | |
b466248d | 46 | * Version 0.11: Converted to v4l2_device. |
2aa72f3b AK |
47 | * |
48 | * Many things to do: | |
3dbda77e | 49 | * - Correct power management of device (suspend & resume) |
2aa72f3b | 50 | * - Add code for scanning and smooth tuning |
2aa72f3b AK |
51 | * - Add code for sensitivity value |
52 | * - Correct mistakes | |
53 | * - In Japan another FREQ_MIN and FREQ_MAX | |
54 | */ | |
55 | ||
56 | /* kernel includes */ | |
57 | #include <linux/kernel.h> | |
58 | #include <linux/module.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/slab.h> | |
405f5571 | 61 | #include <linux/smp_lock.h> |
2aa72f3b AK |
62 | #include <linux/input.h> |
63 | #include <linux/videodev2.h> | |
b466248d | 64 | #include <media/v4l2-device.h> |
2aa72f3b AK |
65 | #include <media/v4l2-ioctl.h> |
66 | #include <linux/usb.h> | |
67 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
24c44d85 | 68 | #include <linux/mutex.h> |
2aa72f3b AK |
69 | |
70 | /* driver and module definitions */ | |
71 | #define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>" | |
72 | #define DRIVER_DESC "AverMedia MR 800 USB FM radio driver" | |
b466248d AK |
73 | #define DRIVER_VERSION "0.11" |
74 | #define RADIO_VERSION KERNEL_VERSION(0, 1, 1) | |
2aa72f3b AK |
75 | |
76 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
77 | MODULE_DESCRIPTION(DRIVER_DESC); | |
78 | MODULE_LICENSE("GPL"); | |
79 | ||
80 | #define USB_AMRADIO_VENDOR 0x07ca | |
81 | #define USB_AMRADIO_PRODUCT 0xb800 | |
82 | ||
e60b022e AK |
83 | /* dev_warn macro with driver name */ |
84 | #define MR800_DRIVER_NAME "radio-mr800" | |
85 | #define amradio_dev_warn(dev, fmt, arg...) \ | |
86 | dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg) | |
87 | ||
502d5016 DE |
88 | #define amradio_dev_err(dev, fmt, arg...) \ |
89 | dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg) | |
90 | ||
2aa72f3b AK |
91 | /* Probably USB_TIMEOUT should be modified in module parameter */ |
92 | #define BUFFER_LENGTH 8 | |
93 | #define USB_TIMEOUT 500 | |
94 | ||
95 | /* Frequency limits in MHz -- these are European values. For Japanese | |
96 | devices, that would be 76 and 91. */ | |
97 | #define FREQ_MIN 87.5 | |
98 | #define FREQ_MAX 108.0 | |
99 | #define FREQ_MUL 16000 | |
100 | ||
db821804 AK |
101 | /* |
102 | * Commands that device should understand | |
103 | * List isnt full and will be updated with implementation of new functions | |
104 | */ | |
f7c1a380 | 105 | #define AMRADIO_SET_FREQ 0xa4 |
db821804 | 106 | #define AMRADIO_SET_MUTE 0xab |
1bb16d71 | 107 | #define AMRADIO_SET_MONO 0xae |
db821804 AK |
108 | |
109 | /* Comfortable defines for amradio_set_mute */ | |
110 | #define AMRADIO_START 0x00 | |
111 | #define AMRADIO_STOP 0x01 | |
112 | ||
1bb16d71 AK |
113 | /* Comfortable defines for amradio_set_stereo */ |
114 | #define WANT_STEREO 0x00 | |
115 | #define WANT_MONO 0x01 | |
116 | ||
2aa72f3b AK |
117 | /* module parameter */ |
118 | static int radio_nr = -1; | |
119 | module_param(radio_nr, int, 0); | |
120 | MODULE_PARM_DESC(radio_nr, "Radio Nr"); | |
121 | ||
2aa72f3b AK |
122 | static int usb_amradio_probe(struct usb_interface *intf, |
123 | const struct usb_device_id *id); | |
124 | static void usb_amradio_disconnect(struct usb_interface *intf); | |
bec43661 HV |
125 | static int usb_amradio_open(struct file *file); |
126 | static int usb_amradio_close(struct file *file); | |
2aa72f3b AK |
127 | static int usb_amradio_suspend(struct usb_interface *intf, |
128 | pm_message_t message); | |
129 | static int usb_amradio_resume(struct usb_interface *intf); | |
130 | ||
131 | /* Data for one (physical) device */ | |
132 | struct amradio_device { | |
133 | /* reference to USB and video device */ | |
134 | struct usb_device *usbdev; | |
7a7d92e0 | 135 | struct video_device videodev; |
b466248d | 136 | struct v4l2_device v4l2_dev; |
2aa72f3b AK |
137 | |
138 | unsigned char *buffer; | |
139 | struct mutex lock; /* buffer locking */ | |
140 | int curfreq; | |
141 | int stereo; | |
2aa72f3b | 142 | int muted; |
502d5016 | 143 | int initialized; |
2aa72f3b AK |
144 | }; |
145 | ||
ceb99e1b DE |
146 | #define vdev_to_amradio(r) container_of(r, struct amradio_device, videodev) |
147 | ||
2aa72f3b AK |
148 | /* USB Device ID List */ |
149 | static struct usb_device_id usb_amradio_device_table[] = { | |
150 | {USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT, | |
151 | USB_CLASS_HID, 0, 0) }, | |
152 | { } /* Terminating entry */ | |
153 | }; | |
154 | ||
155 | MODULE_DEVICE_TABLE(usb, usb_amradio_device_table); | |
156 | ||
157 | /* USB subsystem interface */ | |
158 | static struct usb_driver usb_amradio_driver = { | |
e60b022e | 159 | .name = MR800_DRIVER_NAME, |
2aa72f3b AK |
160 | .probe = usb_amradio_probe, |
161 | .disconnect = usb_amradio_disconnect, | |
162 | .suspend = usb_amradio_suspend, | |
163 | .resume = usb_amradio_resume, | |
164 | .reset_resume = usb_amradio_resume, | |
165 | .id_table = usb_amradio_device_table, | |
f2ce9179 | 166 | .supports_autosuspend = 0, |
2aa72f3b AK |
167 | }; |
168 | ||
db821804 AK |
169 | /* switch on/off the radio. Send 8 bytes to device */ |
170 | static int amradio_set_mute(struct amradio_device *radio, char argument) | |
2aa72f3b AK |
171 | { |
172 | int retval; | |
173 | int size; | |
174 | ||
4aebc289 | 175 | BUG_ON(!mutex_is_locked(&radio->lock)); |
2aa72f3b AK |
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 | ||
16a72f41 DE |
189 | if (retval < 0 || size != BUFFER_LENGTH) { |
190 | amradio_dev_warn(&radio->videodev.dev, "set mute failed\n"); | |
2aa72f3b | 191 | return retval; |
16a72f41 | 192 | } |
2aa72f3b | 193 | |
db821804 | 194 | radio->muted = argument; |
2aa72f3b AK |
195 | |
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 | |
4aebc289 | 206 | BUG_ON(!mutex_is_locked(&radio->lock)); |
2aa72f3b AK |
207 | |
208 | radio->buffer[0] = 0x00; | |
209 | radio->buffer[1] = 0x55; | |
210 | radio->buffer[2] = 0xaa; | |
211 | radio->buffer[3] = 0x03; | |
f7c1a380 | 212 | radio->buffer[4] = AMRADIO_SET_FREQ; |
2aa72f3b AK |
213 | radio->buffer[5] = 0x00; |
214 | radio->buffer[6] = 0x00; | |
215 | radio->buffer[7] = 0x08; | |
216 | ||
217 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
218 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
219 | ||
4aebc289 | 220 | if (retval < 0 || size != BUFFER_LENGTH) |
16a72f41 | 221 | goto out_err; |
2aa72f3b AK |
222 | |
223 | /* frequency is calculated from freq_send and placed in first 2 bytes */ | |
224 | radio->buffer[0] = (freq_send >> 8) & 0xff; | |
225 | radio->buffer[1] = freq_send & 0xff; | |
226 | radio->buffer[2] = 0x01; | |
227 | radio->buffer[3] = 0x00; | |
228 | radio->buffer[4] = 0x00; | |
229 | /* 5 and 6 bytes of buffer already = 0x00 */ | |
230 | radio->buffer[7] = 0x00; | |
231 | ||
232 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
233 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
234 | ||
16a72f41 DE |
235 | if (retval < 0 || size != BUFFER_LENGTH) |
236 | goto out_err; | |
237 | ||
798166db | 238 | radio->curfreq = freq; |
16a72f41 DE |
239 | goto out; |
240 | ||
241 | out_err: | |
242 | amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n"); | |
243 | out: | |
1bb16d71 AK |
244 | return retval; |
245 | } | |
246 | ||
247 | static int amradio_set_stereo(struct amradio_device *radio, char argument) | |
248 | { | |
249 | int retval; | |
250 | int size; | |
251 | ||
4aebc289 | 252 | BUG_ON(!mutex_is_locked(&radio->lock)); |
1bb16d71 AK |
253 | |
254 | radio->buffer[0] = 0x00; | |
255 | radio->buffer[1] = 0x55; | |
256 | radio->buffer[2] = 0xaa; | |
257 | radio->buffer[3] = 0x00; | |
258 | radio->buffer[4] = AMRADIO_SET_MONO; | |
259 | radio->buffer[5] = argument; | |
260 | radio->buffer[6] = 0x00; | |
261 | radio->buffer[7] = 0x00; | |
262 | ||
263 | retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), | |
264 | (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); | |
265 | ||
16a72f41 DE |
266 | if (retval < 0 || size != BUFFER_LENGTH) { |
267 | amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n"); | |
1bb16d71 | 268 | return retval; |
16a72f41 | 269 | } |
1bb16d71 | 270 | |
30dd4508 DE |
271 | if (argument == WANT_STEREO) |
272 | radio->stereo = 1; | |
273 | else | |
274 | radio->stereo = 0; | |
2aa72f3b AK |
275 | |
276 | return retval; | |
277 | } | |
278 | ||
71f07d94 AK |
279 | /* Handle unplugging the device. |
280 | * We call video_unregister_device in any case. | |
281 | * The last function called in this procedure is | |
282 | * usb_amradio_device_release. | |
283 | */ | |
2aa72f3b AK |
284 | static void usb_amradio_disconnect(struct usb_interface *intf) |
285 | { | |
286 | struct amradio_device *radio = usb_get_intfdata(intf); | |
287 | ||
f4e9043e | 288 | mutex_lock(&radio->lock); |
26452bfe | 289 | radio->usbdev = NULL; |
f4e9043e | 290 | mutex_unlock(&radio->lock); |
2aa72f3b | 291 | |
f4e9043e | 292 | usb_set_intfdata(intf, NULL); |
b466248d | 293 | v4l2_device_disconnect(&radio->v4l2_dev); |
4e361657 | 294 | video_unregister_device(&radio->videodev); |
2aa72f3b AK |
295 | } |
296 | ||
297 | /* vidioc_querycap - query device capabilities */ | |
298 | static int vidioc_querycap(struct file *file, void *priv, | |
299 | struct v4l2_capability *v) | |
300 | { | |
ceb99e1b | 301 | struct amradio_device *radio = file->private_data; |
c7181cfa | 302 | |
2aa72f3b AK |
303 | strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); |
304 | strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); | |
c7181cfa | 305 | usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); |
2aa72f3b AK |
306 | v->version = RADIO_VERSION; |
307 | v->capabilities = V4L2_CAP_TUNER; | |
308 | return 0; | |
309 | } | |
310 | ||
311 | /* vidioc_g_tuner - get tuner attributes */ | |
312 | static int vidioc_g_tuner(struct file *file, void *priv, | |
313 | struct v4l2_tuner *v) | |
314 | { | |
ceb99e1b | 315 | struct amradio_device *radio = file->private_data; |
1bb16d71 | 316 | int retval; |
2aa72f3b | 317 | |
eac000a9 DE |
318 | if (v->index > 0) |
319 | return -EINVAL; | |
2aa72f3b AK |
320 | |
321 | /* TODO: Add function which look is signal stereo or not | |
322 | * amradio_getstat(radio); | |
323 | */ | |
1bb16d71 AK |
324 | |
325 | /* we call amradio_set_stereo to set radio->stereo | |
326 | * Honestly, amradio_getstat should cover this in future and | |
327 | * amradio_set_stereo shouldn't be here | |
328 | */ | |
329 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
1bb16d71 | 330 | |
2aa72f3b AK |
331 | strcpy(v->name, "FM"); |
332 | v->type = V4L2_TUNER_RADIO; | |
333 | v->rangelow = FREQ_MIN * FREQ_MUL; | |
334 | v->rangehigh = FREQ_MAX * FREQ_MUL; | |
335 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
336 | v->capability = V4L2_TUNER_CAP_LOW; | |
337 | if (radio->stereo) | |
338 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
339 | else | |
340 | v->audmode = V4L2_TUNER_MODE_MONO; | |
341 | v->signal = 0xffff; /* Can't get the signal strength, sad.. */ | |
342 | v->afc = 0; /* Don't know what is this */ | |
4aebc289 | 343 | |
4aebc289 | 344 | return retval; |
2aa72f3b AK |
345 | } |
346 | ||
347 | /* vidioc_s_tuner - set tuner attributes */ | |
348 | static int vidioc_s_tuner(struct file *file, void *priv, | |
349 | struct v4l2_tuner *v) | |
350 | { | |
ceb99e1b | 351 | struct amradio_device *radio = file->private_data; |
eac000a9 | 352 | int retval = -EINVAL; |
3480130a | 353 | |
eac000a9 DE |
354 | if (v->index > 0) |
355 | return -EINVAL; | |
1bb16d71 AK |
356 | |
357 | /* mono/stereo selector */ | |
358 | switch (v->audmode) { | |
359 | case V4L2_TUNER_MODE_MONO: | |
360 | retval = amradio_set_stereo(radio, WANT_MONO); | |
1bb16d71 AK |
361 | break; |
362 | case V4L2_TUNER_MODE_STEREO: | |
363 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
1bb16d71 | 364 | break; |
1bb16d71 AK |
365 | } |
366 | ||
4aebc289 | 367 | return retval; |
2aa72f3b AK |
368 | } |
369 | ||
370 | /* vidioc_s_frequency - set tuner radio frequency */ | |
371 | static int vidioc_s_frequency(struct file *file, void *priv, | |
372 | struct v4l2_frequency *f) | |
373 | { | |
ceb99e1b | 374 | struct amradio_device *radio = file->private_data; |
3480130a | 375 | |
798166db | 376 | return amradio_setfreq(radio, f->frequency); |
2aa72f3b AK |
377 | } |
378 | ||
379 | /* vidioc_g_frequency - get tuner radio frequency */ | |
380 | static int vidioc_g_frequency(struct file *file, void *priv, | |
381 | struct v4l2_frequency *f) | |
382 | { | |
ceb99e1b | 383 | struct amradio_device *radio = file->private_data; |
3480130a | 384 | |
2aa72f3b AK |
385 | f->type = V4L2_TUNER_RADIO; |
386 | f->frequency = radio->curfreq; | |
4aebc289 | 387 | |
eac000a9 | 388 | return 0; |
2aa72f3b AK |
389 | } |
390 | ||
391 | /* vidioc_queryctrl - enumerate control items */ | |
392 | static int vidioc_queryctrl(struct file *file, void *priv, | |
393 | struct v4l2_queryctrl *qc) | |
394 | { | |
b466248d AK |
395 | switch (qc->id) { |
396 | case V4L2_CID_AUDIO_MUTE: | |
397 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
2aa72f3b | 398 | } |
b466248d | 399 | |
2aa72f3b AK |
400 | return -EINVAL; |
401 | } | |
402 | ||
403 | /* vidioc_g_ctrl - get the value of a control */ | |
404 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
405 | struct v4l2_control *ctrl) | |
406 | { | |
ceb99e1b | 407 | struct amradio_device *radio = file->private_data; |
3480130a | 408 | |
2aa72f3b AK |
409 | switch (ctrl->id) { |
410 | case V4L2_CID_AUDIO_MUTE: | |
411 | ctrl->value = radio->muted; | |
eac000a9 | 412 | return 0; |
2aa72f3b | 413 | } |
4aebc289 | 414 | |
eac000a9 | 415 | return -EINVAL; |
2aa72f3b AK |
416 | } |
417 | ||
418 | /* vidioc_s_ctrl - set the value of a control */ | |
419 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
420 | struct v4l2_control *ctrl) | |
421 | { | |
ceb99e1b | 422 | struct amradio_device *radio = file->private_data; |
4aebc289 DE |
423 | int retval = -EINVAL; |
424 | ||
2aa72f3b AK |
425 | switch (ctrl->id) { |
426 | case V4L2_CID_AUDIO_MUTE: | |
16a72f41 | 427 | if (ctrl->value) |
db821804 | 428 | retval = amradio_set_mute(radio, AMRADIO_STOP); |
16a72f41 | 429 | else |
db821804 | 430 | retval = amradio_set_mute(radio, AMRADIO_START); |
16a72f41 | 431 | |
4aebc289 | 432 | break; |
2aa72f3b | 433 | } |
4aebc289 | 434 | |
4aebc289 | 435 | return retval; |
2aa72f3b AK |
436 | } |
437 | ||
438 | /* vidioc_g_audio - get audio attributes */ | |
439 | static int vidioc_g_audio(struct file *file, void *priv, | |
440 | struct v4l2_audio *a) | |
441 | { | |
442 | if (a->index > 1) | |
443 | return -EINVAL; | |
444 | ||
445 | strcpy(a->name, "Radio"); | |
446 | a->capability = V4L2_AUDCAP_STEREO; | |
447 | return 0; | |
448 | } | |
449 | ||
450 | /* vidioc_s_audio - set audio attributes */ | |
451 | static int vidioc_s_audio(struct file *file, void *priv, | |
452 | struct v4l2_audio *a) | |
453 | { | |
454 | if (a->index != 0) | |
455 | return -EINVAL; | |
456 | return 0; | |
457 | } | |
458 | ||
459 | /* vidioc_g_input - get input */ | |
460 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
461 | { | |
462 | *i = 0; | |
463 | return 0; | |
464 | } | |
465 | ||
466 | /* vidioc_s_input - set input */ | |
467 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
468 | { | |
469 | if (i != 0) | |
470 | return -EINVAL; | |
471 | return 0; | |
472 | } | |
473 | ||
502d5016 DE |
474 | static int usb_amradio_init(struct amradio_device *radio) |
475 | { | |
476 | int retval; | |
477 | ||
478 | retval = amradio_set_mute(radio, AMRADIO_STOP); | |
16a72f41 | 479 | if (retval) |
502d5016 | 480 | goto out_err; |
502d5016 DE |
481 | |
482 | retval = amradio_set_stereo(radio, WANT_STEREO); | |
16a72f41 | 483 | if (retval) |
502d5016 | 484 | goto out_err; |
502d5016 DE |
485 | |
486 | radio->initialized = 1; | |
487 | goto out; | |
488 | ||
489 | out_err: | |
490 | amradio_dev_err(&radio->videodev.dev, "initialization failed\n"); | |
491 | out: | |
492 | return retval; | |
493 | } | |
494 | ||
2aa72f3b | 495 | /* open device - amradio_start() and amradio_setfreq() */ |
bec43661 | 496 | static int usb_amradio_open(struct file *file) |
2aa72f3b | 497 | { |
ceb99e1b | 498 | struct amradio_device *radio = vdev_to_amradio(video_devdata(file)); |
4aebc289 | 499 | int retval = 0; |
2aa72f3b | 500 | |
4aebc289 DE |
501 | mutex_lock(&radio->lock); |
502 | ||
26452bfe | 503 | if (!radio->usbdev) { |
4aebc289 DE |
504 | retval = -EIO; |
505 | goto unlock; | |
506 | } | |
0fabb783 | 507 | |
ceb99e1b | 508 | file->private_data = radio; |
0fabb783 | 509 | |
502d5016 DE |
510 | if (unlikely(!radio->initialized)) |
511 | retval = usb_amradio_init(radio); | |
512 | ||
4aebc289 DE |
513 | unlock: |
514 | mutex_unlock(&radio->lock); | |
515 | return retval; | |
2aa72f3b AK |
516 | } |
517 | ||
f4e9043e | 518 | /*close device */ |
bec43661 | 519 | static int usb_amradio_close(struct file *file) |
2aa72f3b | 520 | { |
ceb99e1b | 521 | struct amradio_device *radio = file->private_data; |
4aebc289 | 522 | int retval = 0; |
3480130a | 523 | |
52433bbb | 524 | mutex_lock(&radio->lock); |
4aebc289 | 525 | |
8a7cd16f | 526 | if (!radio->usbdev) |
4aebc289 | 527 | retval = -EIO; |
3480130a | 528 | |
4aebc289 DE |
529 | mutex_unlock(&radio->lock); |
530 | return retval; | |
2aa72f3b AK |
531 | } |
532 | ||
eac000a9 DE |
533 | static long usb_amradio_ioctl(struct file *file, unsigned int cmd, |
534 | unsigned long arg) | |
535 | { | |
536 | struct amradio_device *radio = file->private_data; | |
537 | long retval = 0; | |
538 | ||
539 | mutex_lock(&radio->lock); | |
540 | ||
26452bfe | 541 | if (!radio->usbdev) { |
eac000a9 DE |
542 | retval = -EIO; |
543 | goto unlock; | |
544 | } | |
545 | ||
546 | retval = video_ioctl2(file, cmd, arg); | |
547 | ||
548 | unlock: | |
549 | mutex_unlock(&radio->lock); | |
550 | return retval; | |
551 | } | |
552 | ||
2aa72f3b AK |
553 | /* Suspend device - stop device. Need to be checked and fixed */ |
554 | static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) | |
555 | { | |
556 | struct amradio_device *radio = usb_get_intfdata(intf); | |
557 | ||
4aebc289 DE |
558 | mutex_lock(&radio->lock); |
559 | ||
d8970e5f | 560 | if (!radio->muted && radio->initialized) { |
16a72f41 | 561 | amradio_set_mute(radio, AMRADIO_STOP); |
d8970e5f DE |
562 | radio->muted = 0; |
563 | } | |
2aa72f3b | 564 | |
e60b022e | 565 | dev_info(&intf->dev, "going into suspend..\n"); |
2aa72f3b | 566 | |
4aebc289 | 567 | mutex_unlock(&radio->lock); |
2aa72f3b AK |
568 | return 0; |
569 | } | |
570 | ||
571 | /* Resume device - start device. Need to be checked and fixed */ | |
572 | static int usb_amradio_resume(struct usb_interface *intf) | |
573 | { | |
574 | struct amradio_device *radio = usb_get_intfdata(intf); | |
575 | ||
4aebc289 DE |
576 | mutex_lock(&radio->lock); |
577 | ||
d8970e5f DE |
578 | if (unlikely(!radio->initialized)) |
579 | goto unlock; | |
580 | ||
581 | if (radio->stereo) | |
16a72f41 | 582 | amradio_set_stereo(radio, WANT_STEREO); |
d8970e5f | 583 | else |
16a72f41 | 584 | amradio_set_stereo(radio, WANT_MONO); |
d8970e5f | 585 | |
16a72f41 | 586 | amradio_setfreq(radio, radio->curfreq); |
2aa72f3b | 587 | |
16a72f41 DE |
588 | if (!radio->muted) |
589 | amradio_set_mute(radio, AMRADIO_START); | |
d8970e5f DE |
590 | |
591 | unlock: | |
e60b022e | 592 | dev_info(&intf->dev, "coming out of suspend..\n"); |
2aa72f3b | 593 | |
4aebc289 | 594 | mutex_unlock(&radio->lock); |
2aa72f3b AK |
595 | return 0; |
596 | } | |
597 | ||
598 | /* File system interface */ | |
bec43661 | 599 | static const struct v4l2_file_operations usb_amradio_fops = { |
2aa72f3b AK |
600 | .owner = THIS_MODULE, |
601 | .open = usb_amradio_open, | |
602 | .release = usb_amradio_close, | |
eac000a9 | 603 | .ioctl = usb_amradio_ioctl, |
2aa72f3b AK |
604 | }; |
605 | ||
606 | static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { | |
607 | .vidioc_querycap = vidioc_querycap, | |
608 | .vidioc_g_tuner = vidioc_g_tuner, | |
609 | .vidioc_s_tuner = vidioc_s_tuner, | |
610 | .vidioc_g_frequency = vidioc_g_frequency, | |
611 | .vidioc_s_frequency = vidioc_s_frequency, | |
612 | .vidioc_queryctrl = vidioc_queryctrl, | |
613 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
614 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
615 | .vidioc_g_audio = vidioc_g_audio, | |
616 | .vidioc_s_audio = vidioc_s_audio, | |
617 | .vidioc_g_input = vidioc_g_input, | |
618 | .vidioc_s_input = vidioc_s_input, | |
619 | }; | |
620 | ||
b466248d | 621 | static void usb_amradio_video_device_release(struct video_device *videodev) |
f4e9043e | 622 | { |
ceb99e1b | 623 | struct amradio_device *radio = vdev_to_amradio(videodev); |
f4e9043e | 624 | |
b466248d AK |
625 | v4l2_device_unregister(&radio->v4l2_dev); |
626 | ||
f4e9043e AK |
627 | /* free rest memory */ |
628 | kfree(radio->buffer); | |
629 | kfree(radio); | |
630 | } | |
631 | ||
a5d69475 | 632 | /* check if the device is present and register with v4l and usb if it is */ |
2aa72f3b AK |
633 | static int usb_amradio_probe(struct usb_interface *intf, |
634 | const struct usb_device_id *id) | |
635 | { | |
636 | struct amradio_device *radio; | |
1b8bbb3c | 637 | int retval = 0; |
2aa72f3b | 638 | |
b466248d | 639 | radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL); |
2aa72f3b | 640 | |
8edafcc6 AK |
641 | if (!radio) { |
642 | dev_err(&intf->dev, "kmalloc for amradio_device failed\n"); | |
1b8bbb3c DE |
643 | retval = -ENOMEM; |
644 | goto err; | |
8edafcc6 | 645 | } |
2aa72f3b AK |
646 | |
647 | radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL); | |
648 | ||
8edafcc6 AK |
649 | if (!radio->buffer) { |
650 | dev_err(&intf->dev, "kmalloc for radio->buffer failed\n"); | |
1b8bbb3c DE |
651 | retval = -ENOMEM; |
652 | goto err_nobuf; | |
2aa72f3b AK |
653 | } |
654 | ||
d1939e4c | 655 | retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); |
b466248d AK |
656 | if (retval < 0) { |
657 | dev_err(&intf->dev, "couldn't register v4l2_device\n"); | |
1b8bbb3c | 658 | goto err_v4l2; |
b466248d AK |
659 | } |
660 | ||
d1939e4c | 661 | strlcpy(radio->videodev.name, radio->v4l2_dev.name, |
7a7d92e0 | 662 | sizeof(radio->videodev.name)); |
d1939e4c | 663 | radio->videodev.v4l2_dev = &radio->v4l2_dev; |
7a7d92e0 DE |
664 | radio->videodev.fops = &usb_amradio_fops; |
665 | radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops; | |
666 | radio->videodev.release = usb_amradio_video_device_release; | |
2aa72f3b | 667 | |
2aa72f3b AK |
668 | radio->usbdev = interface_to_usbdev(intf); |
669 | radio->curfreq = 95.16 * FREQ_MUL; | |
670 | ||
671 | mutex_init(&radio->lock); | |
672 | ||
7a7d92e0 | 673 | video_set_drvdata(&radio->videodev, radio); |
b466248d | 674 | |
7a7d92e0 DE |
675 | retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, |
676 | radio_nr); | |
a5d69475 | 677 | if (retval < 0) { |
65c51dc9 | 678 | dev_err(&intf->dev, "could not register video device\n"); |
1b8bbb3c | 679 | goto err_vdev; |
2aa72f3b AK |
680 | } |
681 | ||
682 | usb_set_intfdata(intf, radio); | |
683 | return 0; | |
1b8bbb3c DE |
684 | |
685 | err_vdev: | |
d1939e4c | 686 | v4l2_device_unregister(&radio->v4l2_dev); |
1b8bbb3c DE |
687 | err_v4l2: |
688 | kfree(radio->buffer); | |
689 | err_nobuf: | |
690 | kfree(radio); | |
691 | err: | |
692 | return retval; | |
2aa72f3b AK |
693 | } |
694 | ||
695 | static int __init amradio_init(void) | |
696 | { | |
697 | int retval = usb_register(&usb_amradio_driver); | |
698 | ||
e60b022e AK |
699 | pr_info(KBUILD_MODNAME |
700 | ": version " DRIVER_VERSION " " DRIVER_DESC "\n"); | |
701 | ||
2aa72f3b | 702 | if (retval) |
e60b022e AK |
703 | pr_err(KBUILD_MODNAME |
704 | ": usb_register failed. Error number %d\n", retval); | |
705 | ||
2aa72f3b AK |
706 | return retval; |
707 | } | |
708 | ||
709 | static void __exit amradio_exit(void) | |
710 | { | |
711 | usb_deregister(&usb_amradio_driver); | |
712 | } | |
713 | ||
714 | module_init(amradio_init); | |
715 | module_exit(amradio_exit); | |
716 |