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 /*
25  * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c
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 through using their
32  * achievements (specifications given).
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://www.spinics.net/lists/linux-usb-devel/msg10109.html
36  *
37  * Version 0.01:	First working version.
38  * 			It's required to blacklist AverMedia USB Radio
39  * 			in usbhid/hid-quirks.c
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.
46  * Version 0.11:	Converted to v4l2_device.
47  *
48  * Many things to do:
49  * 	- Correct power management of device (suspend & resume)
50  * 	- Add code for scanning and smooth tuning
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>
63 #include <media/v4l2-device.h>
64 #include <media/v4l2-ioctl.h>
65 #include <media/v4l2-ctrls.h>
66 #include <media/v4l2-event.h>
67 #include <linux/usb.h>
68 #include <linux/mutex.h>
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"
73 #define DRIVER_VERSION "0.1.2"
74 
75 MODULE_AUTHOR(DRIVER_AUTHOR);
76 MODULE_DESCRIPTION(DRIVER_DESC);
77 MODULE_LICENSE("GPL");
78 MODULE_VERSION(DRIVER_VERSION);
79 
80 #define USB_AMRADIO_VENDOR 0x07ca
81 #define USB_AMRADIO_PRODUCT 0xb800
82 
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 
88 #define amradio_dev_err(dev, fmt, arg...) \
89 		dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
90 
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 
101 /*
102  * Commands that device should understand
103  * List isn't full and will be updated with implementation of new functions
104  */
105 #define AMRADIO_SET_FREQ	0xa4
106 #define AMRADIO_GET_READY_FLAG	0xa5
107 #define AMRADIO_GET_SIGNAL	0xa7
108 #define AMRADIO_GET_FREQ	0xa8
109 #define AMRADIO_SET_SEARCH_UP	0xa9
110 #define AMRADIO_SET_SEARCH_DOWN	0xaa
111 #define AMRADIO_SET_MUTE	0xab
112 #define AMRADIO_SET_RIGHT_MUTE	0xac
113 #define AMRADIO_SET_LEFT_MUTE	0xad
114 #define AMRADIO_SET_MONO	0xae
115 #define AMRADIO_SET_SEARCH_LVL	0xb0
116 #define AMRADIO_STOP_SEARCH	0xb1
117 
118 /* Comfortable defines for amradio_set_stereo */
119 #define WANT_STEREO		0x00
120 #define WANT_MONO		0x01
121 
122 /* module parameter */
123 static int radio_nr = -1;
124 module_param(radio_nr, int, 0);
125 MODULE_PARM_DESC(radio_nr, "Radio Nr");
126 
127 /* Data for one (physical) device */
128 struct amradio_device {
129 	/* reference to USB and video device */
130 	struct usb_device *usbdev;
131 	struct usb_interface *intf;
132 	struct video_device vdev;
133 	struct v4l2_device v4l2_dev;
134 	struct v4l2_ctrl_handler hdl;
135 
136 	u8 *buffer;
137 	struct mutex lock;	/* buffer locking */
138 	int curfreq;
139 	int stereo;
140 	int muted;
141 };
142 
143 static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
144 {
145 	return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
146 }
147 
148 static int amradio_send_cmd(struct amradio_device *radio, u8 cmd, u8 arg,
149 		u8 *extra, u8 extralen, bool reply)
150 {
151 	int retval;
152 	int size;
153 
154 	radio->buffer[0] = 0x00;
155 	radio->buffer[1] = 0x55;
156 	radio->buffer[2] = 0xaa;
157 	radio->buffer[3] = extralen;
158 	radio->buffer[4] = cmd;
159 	radio->buffer[5] = arg;
160 	radio->buffer[6] = 0x00;
161 	radio->buffer[7] = extra || reply ? 8 : 0;
162 
163 	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
164 		radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
165 
166 	if (retval < 0 || size != BUFFER_LENGTH) {
167 		if (video_is_registered(&radio->vdev))
168 			amradio_dev_warn(&radio->vdev.dev,
169 					"cmd %02x failed\n", cmd);
170 		return retval ? retval : -EIO;
171 	}
172 	if (!extra && !reply)
173 		return 0;
174 
175 	if (extra) {
176 		memcpy(radio->buffer, extra, extralen);
177 		memset(radio->buffer + extralen, 0, 8 - extralen);
178 		retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
179 			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
180 	} else {
181 		memset(radio->buffer, 0, 8);
182 		retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81),
183 			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
184 	}
185 	if (retval == 0 && size == BUFFER_LENGTH)
186 		return 0;
187 	if (video_is_registered(&radio->vdev) && cmd != AMRADIO_GET_READY_FLAG)
188 		amradio_dev_warn(&radio->vdev.dev, "follow-up to cmd %02x failed\n", cmd);
189 	return retval ? retval : -EIO;
190 }
191 
192 /* switch on/off the radio. Send 8 bytes to device */
193 static int amradio_set_mute(struct amradio_device *radio, bool mute)
194 {
195 	int ret = amradio_send_cmd(radio,
196 			AMRADIO_SET_MUTE, mute, NULL, 0, false);
197 
198 	if (!ret)
199 		radio->muted = mute;
200 	return ret;
201 }
202 
203 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
204 static int amradio_set_freq(struct amradio_device *radio, int freq)
205 {
206 	unsigned short freq_send;
207 	u8 buf[3];
208 	int retval;
209 
210 	/* we need to be sure that frequency isn't out of range */
211 	freq = clamp_t(unsigned, freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
212 	freq_send = 0x10 + (freq >> 3) / 25;
213 
214 	/* frequency is calculated from freq_send and placed in first 2 bytes */
215 	buf[0] = (freq_send >> 8) & 0xff;
216 	buf[1] = freq_send & 0xff;
217 	buf[2] = 0x01;
218 
219 	retval = amradio_send_cmd(radio, AMRADIO_SET_FREQ, 0, buf, 3, false);
220 	if (retval)
221 		return retval;
222 	radio->curfreq = freq;
223 	msleep(40);
224 	return 0;
225 }
226 
227 static int amradio_set_stereo(struct amradio_device *radio, bool stereo)
228 {
229 	int ret = amradio_send_cmd(radio,
230 			AMRADIO_SET_MONO, !stereo, NULL, 0, false);
231 
232 	if (!ret)
233 		radio->stereo = stereo;
234 	return ret;
235 }
236 
237 static int amradio_get_stat(struct amradio_device *radio, bool *is_stereo, u32 *signal)
238 {
239 	int ret = amradio_send_cmd(radio,
240 			AMRADIO_GET_SIGNAL, 0, NULL, 0, true);
241 
242 	if (ret)
243 		return ret;
244 	*is_stereo = radio->buffer[2] >> 7;
245 	*signal = (radio->buffer[3] & 0xf0) << 8;
246 	return 0;
247 }
248 
249 /* Handle unplugging the device.
250  * We call video_unregister_device in any case.
251  * The last function called in this procedure is
252  * usb_amradio_device_release.
253  */
254 static void usb_amradio_disconnect(struct usb_interface *intf)
255 {
256 	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
257 
258 	mutex_lock(&radio->lock);
259 	video_unregister_device(&radio->vdev);
260 	amradio_set_mute(radio, true);
261 	usb_set_intfdata(intf, NULL);
262 	v4l2_device_disconnect(&radio->v4l2_dev);
263 	mutex_unlock(&radio->lock);
264 	v4l2_device_put(&radio->v4l2_dev);
265 }
266 
267 /* vidioc_querycap - query device capabilities */
268 static int vidioc_querycap(struct file *file, void *priv,
269 					struct v4l2_capability *v)
270 {
271 	struct amradio_device *radio = video_drvdata(file);
272 
273 	strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
274 	strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
275 	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
276 	v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER |
277 					V4L2_CAP_HW_FREQ_SEEK;
278 	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
279 	return 0;
280 }
281 
282 /* vidioc_g_tuner - get tuner attributes */
283 static int vidioc_g_tuner(struct file *file, void *priv,
284 				struct v4l2_tuner *v)
285 {
286 	struct amradio_device *radio = video_drvdata(file);
287 	bool is_stereo = false;
288 	int retval;
289 
290 	if (v->index > 0)
291 		return -EINVAL;
292 
293 	v->signal = 0;
294 	retval = amradio_get_stat(radio, &is_stereo, &v->signal);
295 	if (retval)
296 		return retval;
297 
298 	strcpy(v->name, "FM");
299 	v->type = V4L2_TUNER_RADIO;
300 	v->rangelow = FREQ_MIN * FREQ_MUL;
301 	v->rangehigh = FREQ_MAX * FREQ_MUL;
302 	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
303 		V4L2_TUNER_CAP_HWSEEK_WRAP;
304 	v->rxsubchans = is_stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
305 	v->audmode = radio->stereo ?
306 		V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
307 	return 0;
308 }
309 
310 /* vidioc_s_tuner - set tuner attributes */
311 static int vidioc_s_tuner(struct file *file, void *priv,
312 				const struct v4l2_tuner *v)
313 {
314 	struct amradio_device *radio = video_drvdata(file);
315 
316 	if (v->index > 0)
317 		return -EINVAL;
318 
319 	/* mono/stereo selector */
320 	switch (v->audmode) {
321 	case V4L2_TUNER_MODE_MONO:
322 		return amradio_set_stereo(radio, WANT_MONO);
323 	default:
324 		return amradio_set_stereo(radio, WANT_STEREO);
325 	}
326 }
327 
328 /* vidioc_s_frequency - set tuner radio frequency */
329 static int vidioc_s_frequency(struct file *file, void *priv,
330 				const struct v4l2_frequency *f)
331 {
332 	struct amradio_device *radio = video_drvdata(file);
333 
334 	if (f->tuner != 0)
335 		return -EINVAL;
336 	return amradio_set_freq(radio, f->frequency);
337 }
338 
339 /* vidioc_g_frequency - get tuner radio frequency */
340 static int vidioc_g_frequency(struct file *file, void *priv,
341 				struct v4l2_frequency *f)
342 {
343 	struct amradio_device *radio = video_drvdata(file);
344 
345 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
346 		return -EINVAL;
347 	f->type = V4L2_TUNER_RADIO;
348 	f->frequency = radio->curfreq;
349 
350 	return 0;
351 }
352 
353 static int vidioc_s_hw_freq_seek(struct file *file, void *priv,
354 		const struct v4l2_hw_freq_seek *seek)
355 {
356 	static u8 buf[8] = {
357 		0x3d, 0x32, 0x0f, 0x08, 0x3d, 0x32, 0x0f, 0x08
358 	};
359 	struct amradio_device *radio = video_drvdata(file);
360 	unsigned long timeout;
361 	int retval;
362 
363 	if (seek->tuner != 0 || !seek->wrap_around)
364 		return -EINVAL;
365 
366 	if (file->f_flags & O_NONBLOCK)
367 		return -EWOULDBLOCK;
368 
369 	retval = amradio_send_cmd(radio,
370 			AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false);
371 	if (retval)
372 		return retval;
373 	amradio_set_freq(radio, radio->curfreq);
374 	retval = amradio_send_cmd(radio,
375 		seek->seek_upward ? AMRADIO_SET_SEARCH_UP : AMRADIO_SET_SEARCH_DOWN,
376 		0, NULL, 0, false);
377 	if (retval)
378 		return retval;
379 	timeout = jiffies + msecs_to_jiffies(30000);
380 	for (;;) {
381 		if (time_after(jiffies, timeout)) {
382 			retval = -ENODATA;
383 			break;
384 		}
385 		if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
386 			retval = -ERESTARTSYS;
387 			break;
388 		}
389 		retval = amradio_send_cmd(radio, AMRADIO_GET_READY_FLAG,
390 				0, NULL, 0, true);
391 		if (retval)
392 			continue;
393 		amradio_send_cmd(radio, AMRADIO_GET_FREQ, 0, NULL, 0, true);
394 		if (radio->buffer[1] || radio->buffer[2]) {
395 			/* To check: sometimes radio->curfreq is set to out of range value */
396 			radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2];
397 			radio->curfreq = (radio->curfreq - 0x10) * 200;
398 			amradio_send_cmd(radio, AMRADIO_STOP_SEARCH,
399 					0, NULL, 0, false);
400 			amradio_set_freq(radio, radio->curfreq);
401 			retval = 0;
402 			break;
403 		}
404 	}
405 	amradio_send_cmd(radio, AMRADIO_STOP_SEARCH, 0, NULL, 0, false);
406 	amradio_set_freq(radio, radio->curfreq);
407 	return retval;
408 }
409 
410 static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl)
411 {
412 	struct amradio_device *radio =
413 		container_of(ctrl->handler, struct amradio_device, hdl);
414 
415 	switch (ctrl->id) {
416 	case V4L2_CID_AUDIO_MUTE:
417 		return amradio_set_mute(radio, ctrl->val);
418 	}
419 
420 	return -EINVAL;
421 }
422 
423 static int usb_amradio_init(struct amradio_device *radio)
424 {
425 	int retval;
426 
427 	retval = amradio_set_mute(radio, true);
428 	if (retval)
429 		goto out_err;
430 	retval = amradio_set_stereo(radio, true);
431 	if (retval)
432 		goto out_err;
433 	retval = amradio_set_freq(radio, radio->curfreq);
434 	if (retval)
435 		goto out_err;
436 	return 0;
437 
438 out_err:
439 	amradio_dev_err(&radio->vdev.dev, "initialization failed\n");
440 	return retval;
441 }
442 
443 /* Suspend device - stop device. Need to be checked and fixed */
444 static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
445 {
446 	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
447 
448 	mutex_lock(&radio->lock);
449 	if (!radio->muted) {
450 		amradio_set_mute(radio, true);
451 		radio->muted = false;
452 	}
453 	mutex_unlock(&radio->lock);
454 
455 	dev_info(&intf->dev, "going into suspend..\n");
456 	return 0;
457 }
458 
459 /* Resume device - start device. Need to be checked and fixed */
460 static int usb_amradio_resume(struct usb_interface *intf)
461 {
462 	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
463 
464 	mutex_lock(&radio->lock);
465 	amradio_set_stereo(radio, radio->stereo);
466 	amradio_set_freq(radio, radio->curfreq);
467 
468 	if (!radio->muted)
469 		amradio_set_mute(radio, false);
470 
471 	mutex_unlock(&radio->lock);
472 
473 	dev_info(&intf->dev, "coming out of suspend..\n");
474 	return 0;
475 }
476 
477 static const struct v4l2_ctrl_ops usb_amradio_ctrl_ops = {
478 	.s_ctrl = usb_amradio_s_ctrl,
479 };
480 
481 /* File system interface */
482 static const struct v4l2_file_operations usb_amradio_fops = {
483 	.owner		= THIS_MODULE,
484 	.open		= v4l2_fh_open,
485 	.release	= v4l2_fh_release,
486 	.poll		= v4l2_ctrl_poll,
487 	.unlocked_ioctl	= video_ioctl2,
488 };
489 
490 static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
491 	.vidioc_querycap    = vidioc_querycap,
492 	.vidioc_g_tuner     = vidioc_g_tuner,
493 	.vidioc_s_tuner     = vidioc_s_tuner,
494 	.vidioc_g_frequency = vidioc_g_frequency,
495 	.vidioc_s_frequency = vidioc_s_frequency,
496 	.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
497 	.vidioc_log_status  = v4l2_ctrl_log_status,
498 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
499 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
500 };
501 
502 static void usb_amradio_release(struct v4l2_device *v4l2_dev)
503 {
504 	struct amradio_device *radio = to_amradio_dev(v4l2_dev);
505 
506 	/* free rest memory */
507 	v4l2_ctrl_handler_free(&radio->hdl);
508 	v4l2_device_unregister(&radio->v4l2_dev);
509 	kfree(radio->buffer);
510 	kfree(radio);
511 }
512 
513 /* check if the device is present and register with v4l and usb if it is */
514 static int usb_amradio_probe(struct usb_interface *intf,
515 				const struct usb_device_id *id)
516 {
517 	struct amradio_device *radio;
518 	int retval = 0;
519 
520 	radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
521 
522 	if (!radio) {
523 		dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
524 		retval = -ENOMEM;
525 		goto err;
526 	}
527 
528 	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
529 
530 	if (!radio->buffer) {
531 		dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
532 		retval = -ENOMEM;
533 		goto err_nobuf;
534 	}
535 
536 	retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
537 	if (retval < 0) {
538 		dev_err(&intf->dev, "couldn't register v4l2_device\n");
539 		goto err_v4l2;
540 	}
541 
542 	v4l2_ctrl_handler_init(&radio->hdl, 1);
543 	v4l2_ctrl_new_std(&radio->hdl, &usb_amradio_ctrl_ops,
544 			  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
545 	if (radio->hdl.error) {
546 		retval = radio->hdl.error;
547 		dev_err(&intf->dev, "couldn't register control\n");
548 		goto err_ctrl;
549 	}
550 	mutex_init(&radio->lock);
551 
552 	radio->v4l2_dev.ctrl_handler = &radio->hdl;
553 	radio->v4l2_dev.release = usb_amradio_release;
554 	strlcpy(radio->vdev.name, radio->v4l2_dev.name,
555 		sizeof(radio->vdev.name));
556 	radio->vdev.v4l2_dev = &radio->v4l2_dev;
557 	radio->vdev.fops = &usb_amradio_fops;
558 	radio->vdev.ioctl_ops = &usb_amradio_ioctl_ops;
559 	radio->vdev.release = video_device_release_empty;
560 	radio->vdev.lock = &radio->lock;
561 
562 	radio->usbdev = interface_to_usbdev(intf);
563 	radio->intf = intf;
564 	usb_set_intfdata(intf, &radio->v4l2_dev);
565 	radio->curfreq = 95.16 * FREQ_MUL;
566 
567 	video_set_drvdata(&radio->vdev, radio);
568 	retval = usb_amradio_init(radio);
569 	if (retval)
570 		goto err_vdev;
571 
572 	retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,
573 					radio_nr);
574 	if (retval < 0) {
575 		dev_err(&intf->dev, "could not register video device\n");
576 		goto err_vdev;
577 	}
578 
579 	return 0;
580 
581 err_vdev:
582 	v4l2_ctrl_handler_free(&radio->hdl);
583 err_ctrl:
584 	v4l2_device_unregister(&radio->v4l2_dev);
585 err_v4l2:
586 	kfree(radio->buffer);
587 err_nobuf:
588 	kfree(radio);
589 err:
590 	return retval;
591 }
592 
593 /* USB Device ID List */
594 static struct usb_device_id usb_amradio_device_table[] = {
595 	{ USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
596 							USB_CLASS_HID, 0, 0) },
597 	{ }						/* Terminating entry */
598 };
599 
600 MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
601 
602 /* USB subsystem interface */
603 static struct usb_driver usb_amradio_driver = {
604 	.name			= MR800_DRIVER_NAME,
605 	.probe			= usb_amradio_probe,
606 	.disconnect		= usb_amradio_disconnect,
607 	.suspend		= usb_amradio_suspend,
608 	.resume			= usb_amradio_resume,
609 	.reset_resume		= usb_amradio_resume,
610 	.id_table		= usb_amradio_device_table,
611 };
612 
613 module_usb_driver(usb_amradio_driver);
614