1 // SPDX-License-Identifier: GPL-2.0-or-later
12  * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c
15  * http://av-usbradio.sourceforge.net/index.php
16  * http://sourceforge.net/projects/av-usbradio/
17  * Latest release of theirs project was in 2005.
20  * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio
22  * http://www.spinics.net/lists/linux-usb-devel/msg10109.html
26  *			in usbhid/hid-quirks.c
36  *	- Correct power management of device (suspend & resume)
37  *	- Add code for scanning and smooth tuning
38  *	- Add code for sensitivity value
39  *	- Correct mistakes
40  *	- In Japan another FREQ_MIN and FREQ_MAX
50 #include <media/v4l2-device.h>
51 #include <media/v4l2-ioctl.h>
52 #include <media/v4l2-ctrls.h>
53 #include <media/v4l2-event.h>
71 #define MR800_DRIVER_NAME "radio-mr800"
73 		dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
76 		dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
82 /* Frequency limits in MHz -- these are European values.  For Japanese
110 static int radio_nr = -1;
141 	radio->buffer[0] = 0x00;  in amradio_send_cmd()
142 	radio->buffer[1] = 0x55;  in amradio_send_cmd()
143 	radio->buffer[2] = 0xaa;  in amradio_send_cmd()
144 	radio->buffer[3] = extralen;  in amradio_send_cmd()
145 	radio->buffer[4] = cmd;  in amradio_send_cmd()
146 	radio->buffer[5] = arg;  in amradio_send_cmd()
147 	radio->buffer[6] = 0x00;  in amradio_send_cmd()
148 	radio->buffer[7] = extra || reply ? 8 : 0;  in amradio_send_cmd()
150 	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),  in amradio_send_cmd()
151 		radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);  in amradio_send_cmd()
154 		if (video_is_registered(&radio->vdev))  in amradio_send_cmd()
155 			amradio_dev_warn(&radio->vdev.dev,  in amradio_send_cmd()
157 		return retval ? retval : -EIO;  in amradio_send_cmd()
163 		memcpy(radio->buffer, extra, extralen);  in amradio_send_cmd()
164 		memset(radio->buffer + extralen, 0, 8 - extralen);  in amradio_send_cmd()
165 		retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),  in amradio_send_cmd()
166 			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);  in amradio_send_cmd()
168 		memset(radio->buffer, 0, 8);  in amradio_send_cmd()
169 		retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81),  in amradio_send_cmd()
170 			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);  in amradio_send_cmd()
174 	if (video_is_registered(&radio->vdev) && cmd != AMRADIO_GET_READY_FLAG)  in amradio_send_cmd()
175 		amradio_dev_warn(&radio->vdev.dev, "follow-up to cmd %02x failed\n", cmd);  in amradio_send_cmd()
176 	return retval ? retval : -EIO;  in amradio_send_cmd()
186 		radio->muted = mute;  in amradio_set_mute()
209 	radio->curfreq = freq;  in amradio_set_freq()
220 		radio->stereo = stereo;  in amradio_set_stereo()
231 	*is_stereo = radio->buffer[2] >> 7;  in amradio_get_stat()
232 	*signal = (radio->buffer[3] & 0xf0) << 8;  in amradio_get_stat()
245 	mutex_lock(&radio->lock);  in usb_amradio_disconnect()
246 	video_unregister_device(&radio->vdev);  in usb_amradio_disconnect()
249 	v4l2_device_disconnect(&radio->v4l2_dev);  in usb_amradio_disconnect()
250 	mutex_unlock(&radio->lock);  in usb_amradio_disconnect()
251 	v4l2_device_put(&radio->v4l2_dev);  in usb_amradio_disconnect()
254 /* vidioc_querycap - query device capabilities */
260 	strscpy(v->driver, "radio-mr800", sizeof(v->driver));  in vidioc_querycap()
261 	strscpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));  in vidioc_querycap()
262 	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));  in vidioc_querycap()
266 /* vidioc_g_tuner - get tuner attributes */
274 	if (v->index > 0)  in vidioc_g_tuner()
275 		return -EINVAL;  in vidioc_g_tuner()
277 	v->signal = 0;  in vidioc_g_tuner()
278 	retval = amradio_get_stat(radio, &is_stereo, &v->signal);  in vidioc_g_tuner()
282 	strscpy(v->name, "FM", sizeof(v->name));  in vidioc_g_tuner()
283 	v->type = V4L2_TUNER_RADIO;  in vidioc_g_tuner()
284 	v->rangelow = FREQ_MIN * FREQ_MUL;  in vidioc_g_tuner()
285 	v->rangehigh = FREQ_MAX * FREQ_MUL;  in vidioc_g_tuner()
286 	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |  in vidioc_g_tuner()
288 	v->rxsubchans = is_stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;  in vidioc_g_tuner()
289 	v->audmode = radio->stereo ?  in vidioc_g_tuner()
294 /* vidioc_s_tuner - set tuner attributes */
300 	if (v->index > 0)  in vidioc_s_tuner()
301 		return -EINVAL;  in vidioc_s_tuner()
304 	switch (v->audmode) {  in vidioc_s_tuner()
312 /* vidioc_s_frequency - set tuner radio frequency */
318 	if (f->tuner != 0)  in vidioc_s_frequency()
319 		return -EINVAL;  in vidioc_s_frequency()
320 	return amradio_set_freq(radio, f->frequency);  in vidioc_s_frequency()
323 /* vidioc_g_frequency - get tuner radio frequency */
329 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)  in vidioc_g_frequency()
330 		return -EINVAL;  in vidioc_g_frequency()
331 	f->type = V4L2_TUNER_RADIO;  in vidioc_g_frequency()
332 	f->frequency = radio->curfreq;  in vidioc_g_frequency()
347 	if (seek->tuner != 0 || !seek->wrap_around)  in vidioc_s_hw_freq_seek()
348 		return -EINVAL;  in vidioc_s_hw_freq_seek()
350 	if (file->f_flags & O_NONBLOCK)  in vidioc_s_hw_freq_seek()
351 		return -EWOULDBLOCK;  in vidioc_s_hw_freq_seek()
357 	amradio_set_freq(radio, radio->curfreq);  in vidioc_s_hw_freq_seek()
359 		seek->seek_upward ? AMRADIO_SET_SEARCH_UP : AMRADIO_SET_SEARCH_DOWN,  in vidioc_s_hw_freq_seek()
366 			retval = -ENODATA;  in vidioc_s_hw_freq_seek()
370 			retval = -ERESTARTSYS;  in vidioc_s_hw_freq_seek()
378 		if (radio->buffer[1] || radio->buffer[2]) {  in vidioc_s_hw_freq_seek()
379 			/* To check: sometimes radio->curfreq is set to out of range value */  in vidioc_s_hw_freq_seek()
380 			radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2];  in vidioc_s_hw_freq_seek()
381 			radio->curfreq = (radio->curfreq - 0x10) * 200;  in vidioc_s_hw_freq_seek()
384 			amradio_set_freq(radio, radio->curfreq);  in vidioc_s_hw_freq_seek()
390 	amradio_set_freq(radio, radio->curfreq);  in vidioc_s_hw_freq_seek()
397 		container_of(ctrl->handler, struct amradio_device, hdl);  in usb_amradio_s_ctrl()
399 	switch (ctrl->id) {  in usb_amradio_s_ctrl()
401 		return amradio_set_mute(radio, ctrl->val);  in usb_amradio_s_ctrl()
404 	return -EINVAL;  in usb_amradio_s_ctrl()
417 	retval = amradio_set_freq(radio, radio->curfreq);  in usb_amradio_init()
423 	amradio_dev_err(&radio->vdev.dev, "initialization failed\n");  in usb_amradio_init()
427 /* Suspend device - stop device. Need to be checked and fixed */
432 	mutex_lock(&radio->lock);  in usb_amradio_suspend()
433 	if (!radio->muted) {  in usb_amradio_suspend()
435 		radio->muted = false;  in usb_amradio_suspend()
437 	mutex_unlock(&radio->lock);  in usb_amradio_suspend()
439 	dev_info(&intf->dev, "going into suspend..\n");  in usb_amradio_suspend()
443 /* Resume device - start device. Need to be checked and fixed */
448 	mutex_lock(&radio->lock);  in usb_amradio_resume()
449 	amradio_set_stereo(radio, radio->stereo);  in usb_amradio_resume()
450 	amradio_set_freq(radio, radio->curfreq);  in usb_amradio_resume()
452 	if (!radio->muted)  in usb_amradio_resume()
455 	mutex_unlock(&radio->lock);  in usb_amradio_resume()
457 	dev_info(&intf->dev, "coming out of suspend..\n");  in usb_amradio_resume()
469 	.release	= v4l2_fh_release,
491 	v4l2_ctrl_handler_free(&radio->hdl);  in usb_amradio_release()
492 	v4l2_device_unregister(&radio->v4l2_dev);  in usb_amradio_release()
493 	kfree(radio->buffer);  in usb_amradio_release()
507 		dev_err(&intf->dev, "kmalloc for amradio_device failed\n");  in usb_amradio_probe()
508 		retval = -ENOMEM;  in usb_amradio_probe()
512 	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);  in usb_amradio_probe()
514 	if (!radio->buffer) {  in usb_amradio_probe()
515 		dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");  in usb_amradio_probe()
516 		retval = -ENOMEM;  in usb_amradio_probe()
520 	retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);  in usb_amradio_probe()
522 		dev_err(&intf->dev, "couldn't register v4l2_device\n");  in usb_amradio_probe()
526 	v4l2_ctrl_handler_init(&radio->hdl, 1);  in usb_amradio_probe()
527 	v4l2_ctrl_new_std(&radio->hdl, &usb_amradio_ctrl_ops,  in usb_amradio_probe()
529 	if (radio->hdl.error) {  in usb_amradio_probe()
530 		retval = radio->hdl.error;  in usb_amradio_probe()
531 		dev_err(&intf->dev, "couldn't register control\n");  in usb_amradio_probe()
534 	mutex_init(&radio->lock);  in usb_amradio_probe()
536 	radio->v4l2_dev.ctrl_handler = &radio->hdl;  in usb_amradio_probe()
537 	radio->v4l2_dev.release = usb_amradio_release;  in usb_amradio_probe()
538 	strscpy(radio->vdev.name, radio->v4l2_dev.name,  in usb_amradio_probe()
539 		sizeof(radio->vdev.name));  in usb_amradio_probe()
540 	radio->vdev.v4l2_dev = &radio->v4l2_dev;  in usb_amradio_probe()
541 	radio->vdev.fops = &usb_amradio_fops;  in usb_amradio_probe()
542 	radio->vdev.ioctl_ops = &usb_amradio_ioctl_ops;  in usb_amradio_probe()
543 	radio->vdev.release = video_device_release_empty;  in usb_amradio_probe()
544 	radio->vdev.lock = &radio->lock;  in usb_amradio_probe()
545 	radio->vdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER |  in usb_amradio_probe()
548 	radio->usbdev = interface_to_usbdev(intf);  in usb_amradio_probe()
549 	radio->intf = intf;  in usb_amradio_probe()
550 	usb_set_intfdata(intf, &radio->v4l2_dev);  in usb_amradio_probe()
551 	radio->curfreq = 95.16 * FREQ_MUL;  in usb_amradio_probe()
553 	video_set_drvdata(&radio->vdev, radio);  in usb_amradio_probe()
558 	retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,  in usb_amradio_probe()
561 		dev_err(&intf->dev, "could not register video device\n");  in usb_amradio_probe()
568 	v4l2_ctrl_handler_free(&radio->hdl);  in usb_amradio_probe()
570 	v4l2_device_unregister(&radio->v4l2_dev);  in usb_amradio_probe()
572 	kfree(radio->buffer);  in usb_amradio_probe()