[mirror_ubuntu-hirsute-kernel.git] / drivers / media / radio / dsbr100.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
 * The device plugs into both the USB and an analog audio input, so this thing
 * only deals with initialisation and frequency setting, the
 * audio data has to be handled by a sound driver.
 *
 * Major issue: I can't find out where the device reports the signal
 * strength, and indeed the windows software appearantly just looks
 * at the stereo indicator as well.  So, scanning will only find
 * stereo stations.  Sad, but I can't help it.
 *
 * Also, the windows program sends oodles of messages over to the
 * device, and I couldn't figure out their meaning.  My suspicion
 * is that they don't have any:-)
 *
 * You might find some interesting stuff about this module at
 * http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
 *
 * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
 *
 * Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
*/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/videodev2.h>
#include <linux/usb.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>

/*
 * Version Information
 */
MODULE_AUTHOR("Markus Demleitner <msdemlei@tucana.harvard.edu>");
MODULE_DESCRIPTION("D-Link DSB-R100 USB FM radio driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.1.0");

#define DSB100_VENDOR 0x04b4
#define DSB100_PRODUCT 0x1002

/* Commands the device appears to understand */
#define DSB100_TUNE 1
#define DSB100_ONOFF 2

#define TB_LEN 16

/* Frequency limits in MHz -- these are European values.  For Japanese
devices, that would be 76 and 91.  */
#define FREQ_MIN  87.5
#define FREQ_MAX 108.0
#define FREQ_MUL 16000

#define v4l2_dev_to_radio(d) container_of(d, struct dsbr100_device, v4l2_dev)

static int radio_nr = -1;
module_param(radio_nr, int, 0);

/* Data for one (physical) device */
struct dsbr100_device {
	struct usb_device *usbdev;
	struct video_device videodev;
	struct v4l2_device v4l2_dev;
	struct v4l2_ctrl_handler hdl;

	u8 *transfer_buffer;
	struct mutex v4l2_lock;
	int curfreq;
	bool stereo;
	bool muted;
};

/* Low-level device interface begins here */

/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
static int dsbr100_setfreq(struct dsbr100_device *radio, unsigned freq)
{
	unsigned f = (freq / 16 * 80) / 1000 + 856;
	int retval = 0;

	if (!radio->muted) {
		retval = usb_control_msg(radio->usbdev,
				usb_rcvctrlpipe(radio->usbdev, 0),
				DSB100_TUNE,
				USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
				(f >> 8) & 0x00ff, f & 0xff,
				radio->transfer_buffer, 8, 300);
		if (retval >= 0)
			mdelay(1);
	}

	if (retval >= 0) {
		radio->curfreq = freq;
		return 0;
	}
	dev_err(&radio->usbdev->dev,
		"%s - usb_control_msg returned %i, request %i\n",
			__func__, retval, DSB100_TUNE);
	return retval;
}

/* switch on radio */
static int dsbr100_start(struct dsbr100_device *radio)
{
	int retval = usb_control_msg(radio->usbdev,
		usb_rcvctrlpipe(radio->usbdev, 0),
		DSB100_ONOFF,
		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
		0x01, 0x00, radio->transfer_buffer, 8, 300);

	if (retval >= 0)
		return dsbr100_setfreq(radio, radio->curfreq);
	dev_err(&radio->usbdev->dev,
		"%s - usb_control_msg returned %i, request %i\n",
			__func__, retval, DSB100_ONOFF);
	return retval;

}

/* switch off radio */
static int dsbr100_stop(struct dsbr100_device *radio)
{
	int retval = usb_control_msg(radio->usbdev,
		usb_rcvctrlpipe(radio->usbdev, 0),
		DSB100_ONOFF,
		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
		0x00, 0x00, radio->transfer_buffer, 8, 300);

	if (retval >= 0)
		return 0;
	dev_err(&radio->usbdev->dev,
		"%s - usb_control_msg returned %i, request %i\n",
			__func__, retval, DSB100_ONOFF);
	return retval;

}

/* return the device status.  This is, in effect, just whether it
sees a stereo signal or not.  Pity. */
static void dsbr100_getstat(struct dsbr100_device *radio)
{
	int retval = usb_control_msg(radio->usbdev,
		usb_rcvctrlpipe(radio->usbdev, 0),
		USB_REQ_GET_STATUS,
		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
		0x00, 0x24, radio->transfer_buffer, 8, 300);

	if (retval < 0) {
		radio->stereo = false;
		dev_err(&radio->usbdev->dev,
			"%s - usb_control_msg returned %i, request %i\n",
				__func__, retval, USB_REQ_GET_STATUS);
	} else {
		radio->stereo = !(radio->transfer_buffer[0] & 0x01);
	}
}

static int vidioc_querycap(struct file *file, void *priv,
					struct v4l2_capability *v)
{
	struct dsbr100_device *radio = video_drvdata(file);

	strscpy(v->driver, "dsbr100", sizeof(v->driver));
	strscpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
	return 0;
}

static int vidioc_g_tuner(struct file *file, void *priv,
				struct v4l2_tuner *v)
{
	struct dsbr100_device *radio = video_drvdata(file);

	if (v->index > 0)
		return -EINVAL;

	dsbr100_getstat(radio);
	strscpy(v->name, "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = FREQ_MIN * FREQ_MUL;
	v->rangehigh = FREQ_MAX * FREQ_MUL;
	v->rxsubchans = radio->stereo ? V4L2_TUNER_SUB_STEREO :
		V4L2_TUNER_SUB_MONO;
	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
	v->audmode = V4L2_TUNER_MODE_STEREO;
	v->signal = radio->stereo ? 0xffff : 0;     /* We can't get the signal strength */
	return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
				const struct v4l2_tuner *v)
{
	return v->index ? -EINVAL : 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
				const struct v4l2_frequency *f)
{
	struct dsbr100_device *radio = video_drvdata(file);

	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
		return -EINVAL;

	return dsbr100_setfreq(radio, clamp_t(unsigned, f->frequency,
			FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
}

static int vidioc_g_frequency(struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct dsbr100_device *radio = video_drvdata(file);

	if (f->tuner)
		return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = radio->curfreq;
	return 0;
}

static int usb_dsbr100_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct dsbr100_device *radio =
		container_of(ctrl->handler, struct dsbr100_device, hdl);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		radio->muted = ctrl->val;
		return radio->muted ? dsbr100_stop(radio) : dsbr100_start(radio);
	}
	return -EINVAL;
}


/* USB subsystem interface begins here */

/*
 * Handle unplugging of the device.
 * We call video_unregister_device in any case.
 * The last function called in this procedure is
 * usb_dsbr100_video_device_release
 */
static void usb_dsbr100_disconnect(struct usb_interface *intf)
{
	struct dsbr100_device *radio = usb_get_intfdata(intf);

	mutex_lock(&radio->v4l2_lock);
	/*
	 * Disconnect is also called on unload, and in that case we need to
	 * mute the device. This call will silently fail if it is called
	 * after a physical disconnect.
	 */
	usb_control_msg(radio->usbdev,
		usb_rcvctrlpipe(radio->usbdev, 0),
		DSB100_ONOFF,
		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
		0x00, 0x00, radio->transfer_buffer, 8, 300);
	usb_set_intfdata(intf, NULL);
	video_unregister_device(&radio->videodev);
	v4l2_device_disconnect(&radio->v4l2_dev);
	mutex_unlock(&radio->v4l2_lock);
	v4l2_device_put(&radio->v4l2_dev);
}


/* Suspend device - stop device. */
static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct dsbr100_device *radio = usb_get_intfdata(intf);

	mutex_lock(&radio->v4l2_lock);
	if (!radio->muted && dsbr100_stop(radio) < 0)
		dev_warn(&intf->dev, "dsbr100_stop failed\n");
	mutex_unlock(&radio->v4l2_lock);

	dev_info(&intf->dev, "going into suspend..\n");
	return 0;
}

/* Resume device - start device. */
static int usb_dsbr100_resume(struct usb_interface *intf)
{
	struct dsbr100_device *radio = usb_get_intfdata(intf);

	mutex_lock(&radio->v4l2_lock);
	if (!radio->muted && dsbr100_start(radio) < 0)
		dev_warn(&intf->dev, "dsbr100_start failed\n");
	mutex_unlock(&radio->v4l2_lock);

	dev_info(&intf->dev, "coming out of suspend..\n");
	return 0;
}

/* free data structures */
static void usb_dsbr100_release(struct v4l2_device *v4l2_dev)
{
	struct dsbr100_device *radio = v4l2_dev_to_radio(v4l2_dev);

	v4l2_ctrl_handler_free(&radio->hdl);
	v4l2_device_unregister(&radio->v4l2_dev);
	kfree(radio->transfer_buffer);
	kfree(radio);
}

static const struct v4l2_ctrl_ops usb_dsbr100_ctrl_ops = {
	.s_ctrl = usb_dsbr100_s_ctrl,
};

/* File system interface */
static const struct v4l2_file_operations usb_dsbr100_fops = {
	.owner		= THIS_MODULE,
	.unlocked_ioctl	= video_ioctl2,
	.open           = v4l2_fh_open,
	.release        = v4l2_fh_release,
	.poll		= v4l2_ctrl_poll,
};

static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
	.vidioc_querycap    = vidioc_querycap,
	.vidioc_g_tuner     = vidioc_g_tuner,
	.vidioc_s_tuner     = vidioc_s_tuner,
	.vidioc_g_frequency = vidioc_g_frequency,
	.vidioc_s_frequency = vidioc_s_frequency,
	.vidioc_log_status  = v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

/* check if the device is present and register with v4l and usb if it is */
static int usb_dsbr100_probe(struct usb_interface *intf,
				const struct usb_device_id *id)
{
	struct dsbr100_device *radio;
	struct v4l2_device *v4l2_dev;
	int retval;

	radio = kzalloc(sizeof(struct dsbr100_device), GFP_KERNEL);

	if (!radio)
		return -ENOMEM;

	radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);

	if (!(radio->transfer_buffer)) {
		kfree(radio);
		return -ENOMEM;
	}

	v4l2_dev = &radio->v4l2_dev;
	v4l2_dev->release = usb_dsbr100_release;

	retval = v4l2_device_register(&intf->dev, v4l2_dev);
	if (retval < 0) {
		v4l2_err(v4l2_dev, "couldn't register v4l2_device\n");
		goto err_reg_dev;
	}

	v4l2_ctrl_handler_init(&radio->hdl, 1);
	v4l2_ctrl_new_std(&radio->hdl, &usb_dsbr100_ctrl_ops,
			  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
	if (radio->hdl.error) {
		retval = radio->hdl.error;
		v4l2_err(v4l2_dev, "couldn't register control\n");
		goto err_reg_ctrl;
	}
	mutex_init(&radio->v4l2_lock);
	strscpy(radio->videodev.name, v4l2_dev->name,
		sizeof(radio->videodev.name));
	radio->videodev.v4l2_dev = v4l2_dev;
	radio->videodev.fops = &usb_dsbr100_fops;
	radio->videodev.ioctl_ops = &usb_dsbr100_ioctl_ops;
	radio->videodev.release = video_device_release_empty;
	radio->videodev.lock = &radio->v4l2_lock;
	radio->videodev.ctrl_handler = &radio->hdl;
	radio->videodev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;

	radio->usbdev = interface_to_usbdev(intf);
	radio->curfreq = FREQ_MIN * FREQ_MUL;
	radio->muted = true;

	video_set_drvdata(&radio->videodev, radio);
	usb_set_intfdata(intf, radio);

	retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
	if (retval == 0)
		return 0;
	v4l2_err(v4l2_dev, "couldn't register video device\n");

err_reg_ctrl:
	v4l2_ctrl_handler_free(&radio->hdl);
	v4l2_device_unregister(v4l2_dev);
err_reg_dev:
	kfree(radio->transfer_buffer);
	kfree(radio);
	return retval;
}

static const struct usb_device_id usb_dsbr100_device_table[] = {
	{ USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
	{ }						/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, usb_dsbr100_device_table);

/* USB subsystem interface */
static struct usb_driver usb_dsbr100_driver = {
	.name			= "dsbr100",
	.probe			= usb_dsbr100_probe,
	.disconnect		= usb_dsbr100_disconnect,
	.id_table		= usb_dsbr100_device_table,
	.suspend		= usb_dsbr100_suspend,
	.resume			= usb_dsbr100_resume,
	.reset_resume		= usb_dsbr100_resume,
};

module_usb_driver(usb_dsbr100_driver);
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
fc55bcb0	2	/* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
5d778648 HV	3	* The device plugs into both the USB and an analog audio input, so this thing
	4	* only deals with initialisation and frequency setting, the
	5	* audio data has to be handled by a sound driver.
	6	*
	7	* Major issue: I can't find out where the device reports the signal
	8	* strength, and indeed the windows software appearantly just looks
	9	* at the stereo indicator as well. So, scanning will only find
	10	* stereo stations. Sad, but I can't help it.
	11	*
	12	* Also, the windows program sends oodles of messages over to the
	13	* device, and I couldn't figure out their meaning. My suspicion
	14	* is that they don't have any:-)
	15	*
	16	* You might find some interesting stuff about this module at
	17	* http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
	18	*
	19	* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
	20	*
	21	* Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
1da177e4 LT	22	*/
1da177e4 LT	23
1da177e4 LT	24	#include <linux/kernel.h>
	25	#include <linux/module.h>
	26	#include <linux/init.h>
	27	#include <linux/slab.h>
	28	#include <linux/input.h>
5aff308c	29	#include <linux/videodev2.h>
5d778648	30	#include <linux/usb.h>
406827cc	31	#include <media/v4l2-device.h>
35ea11ff	32	#include <media/v4l2-ioctl.h>
5d778648 HV	33	#include <media/v4l2-ctrls.h>
5d778648 HV	34	#include <media/v4l2-event.h>
1da177e4 LT	35
	36	/*
	37	* Version Information
	38	*/
5d778648 HV	39	MODULE_AUTHOR("Markus Demleitner <msdemlei@tucana.harvard.edu>");
	40	MODULE_DESCRIPTION("D-Link DSB-R100 USB FM radio driver");
	41	MODULE_LICENSE("GPL");
	42	MODULE_VERSION("1.1.0");
1da177e4 LT	43
	44	#define DSB100_VENDOR 0x04b4
	45	#define DSB100_PRODUCT 0x1002
	46
	47	/* Commands the device appears to understand */
	48	#define DSB100_TUNE 1
	49	#define DSB100_ONOFF 2
	50
	51	#define TB_LEN 16
	52
	53	/* Frequency limits in MHz -- these are European values. For Japanese
	54	devices, that would be 76 and 91. */
	55	#define FREQ_MIN 87.5
	56	#define FREQ_MAX 108.0
	57	#define FREQ_MUL 16000
	58
13099294	59	#define v4l2_dev_to_radio(d) container_of(d, struct dsbr100_device, v4l2_dev)
1da177e4	60
1da177e4 LT	61	static int radio_nr = -1;
	62	module_param(radio_nr, int, 0);
	63
	64	/* Data for one (physical) device */
5aff308c	65	struct dsbr100_device {
1da177e4	66	struct usb_device *usbdev;
3a0efc32	67	struct video_device videodev;
406827cc	68	struct v4l2_device v4l2_dev;
5d778648	69	struct v4l2_ctrl_handler hdl;
406827cc	70
863c86dd	71	u8 *transfer_buffer;
e64d07c9	72	struct mutex v4l2_lock;
1da177e4	73	int curfreq;
5d778648 HV	74	bool stereo;
5d778648 HV	75	bool muted;
1da177e4 LT	76	};
	77
	78	/* Low-level device interface begins here */
	79
5d778648 HV	80	/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
5d778648 HV	81	static int dsbr100_setfreq(struct dsbr100_device *radio, unsigned freq)
1da177e4	82	{
5d778648 HV	83	unsigned f = (freq / 16 * 80) / 1000 + 856;
	84	int retval = 0;
	85
	86	if (!radio->muted) {
	87	retval = usb_control_msg(radio->usbdev,
	88	usb_rcvctrlpipe(radio->usbdev, 0),
	89	DSB100_TUNE,
	90	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
	91	(f >> 8) & 0x00ff, f & 0xff,
	92	radio->transfer_buffer, 8, 300);
	93	if (retval >= 0)
	94	mdelay(1);
3a0efc32 AK	95	}
3a0efc32 AK	96
5d778648 HV	97	if (retval >= 0) {
	98	radio->curfreq = freq;
	99	return 0;
417b7953	100	}
417b7953 AK	101	dev_err(&radio->usbdev->dev,
417b7953 AK	102	"%s - usb_control_msg returned %i, request %i\n",
5d778648	103	__func__, retval, DSB100_TUNE);
d25cb646	104	return retval;
1da177e4 LT	105	}
1da177e4 LT	106
5d778648 HV	107	/* switch on radio */
5d778648 HV	108	static int dsbr100_start(struct dsbr100_device *radio)
1da177e4	109	{
5d778648	110	int retval = usb_control_msg(radio->usbdev,
417b7953 AK	111	usb_rcvctrlpipe(radio->usbdev, 0),
	112	DSB100_ONOFF,
	113	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
5d778648	114	0x01, 0x00, radio->transfer_buffer, 8, 300);
417b7953	115
5d778648 HV	116	if (retval >= 0)
5d778648 HV	117	return dsbr100_setfreq(radio, radio->curfreq);
417b7953 AK	118	dev_err(&radio->usbdev->dev,
417b7953 AK	119	"%s - usb_control_msg returned %i, request %i\n",
5d778648	120	__func__, retval, DSB100_ONOFF);
d25cb646	121	return retval;
417b7953	122
1da177e4 LT	123	}
1da177e4 LT	124
5d778648 HV	125	/* switch off radio */
5d778648 HV	126	static int dsbr100_stop(struct dsbr100_device *radio)
1da177e4	127	{
5d778648	128	int retval = usb_control_msg(radio->usbdev,
417b7953	129	usb_rcvctrlpipe(radio->usbdev, 0),
5d778648	130	DSB100_ONOFF,
417b7953	131	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
5d778648	132	0x00, 0x00, radio->transfer_buffer, 8, 300);
417b7953	133
5d778648 HV	134	if (retval >= 0)
5d778648 HV	135	return 0;
417b7953 AK	136	dev_err(&radio->usbdev->dev,
417b7953 AK	137	"%s - usb_control_msg returned %i, request %i\n",
5d778648	138	__func__, retval, DSB100_ONOFF);
d25cb646	139	return retval;
5d778648	140
1da177e4 LT	141	}
	142
	143	/* return the device status. This is, in effect, just whether it
	144	sees a stereo signal or not. Pity. */
5aff308c	145	static void dsbr100_getstat(struct dsbr100_device *radio)
1da177e4	146	{
5d778648	147	int retval = usb_control_msg(radio->usbdev,
417b7953	148	usb_rcvctrlpipe(radio->usbdev, 0),
d56410e0	149	USB_REQ_GET_STATUS,
1da177e4	150	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
5d778648	151	0x00, 0x24, radio->transfer_buffer, 8, 300);
417b7953 AK	152
417b7953 AK	153	if (retval < 0) {
5d778648	154	radio->stereo = false;
417b7953 AK	155	dev_err(&radio->usbdev->dev,
	156	"%s - usb_control_msg returned %i, request %i\n",
	157	__func__, retval, USB_REQ_GET_STATUS);
	158	} else {
223377e7	159	radio->stereo = !(radio->transfer_buffer[0] & 0x01);
417b7953	160	}
1da177e4 LT	161	}
1da177e4 LT	162
7002a4f3 DL	163	static int vidioc_querycap(struct file file, void priv,
	164	struct v4l2_capability *v)
	165	{
c7181cfa AK	166	struct dsbr100_device *radio = video_drvdata(file);
c7181cfa AK	167
c0decac1 MCC	168	strscpy(v->driver, "dsbr100", sizeof(v->driver));
c0decac1 MCC	169	strscpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
c7181cfa	170	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
7002a4f3 DL	171	return 0;
7002a4f3 DL	172	}
1da177e4	173
7002a4f3 DL	174	static int vidioc_g_tuner(struct file file, void priv,
7002a4f3 DL	175	struct v4l2_tuner *v)
1da177e4	176	{
c170ecf4	177	struct dsbr100_device *radio = video_drvdata(file);
7002a4f3 DL	178
	179	if (v->index > 0)
	180	return -EINVAL;
	181
	182	dsbr100_getstat(radio);
cc1e6315	183	strscpy(v->name, "FM", sizeof(v->name));
7002a4f3	184	v->type = V4L2_TUNER_RADIO;
223377e7 AK	185	v->rangelow = FREQ_MIN * FREQ_MUL;
223377e7 AK	186	v->rangehigh = FREQ_MAX * FREQ_MUL;
5d778648 HV	187	v->rxsubchans = radio->stereo ? V4L2_TUNER_SUB_STEREO :
	188	V4L2_TUNER_SUB_MONO;
	189	v->capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO;
	190	v->audmode = V4L2_TUNER_MODE_STEREO;
	191	v->signal = radio->stereo ? 0xffff : 0; /* We can't get the signal strength */
7002a4f3 DL	192	return 0;
7002a4f3 DL	193	}
1da177e4	194
7002a4f3	195	static int vidioc_s_tuner(struct file file, void priv,
2f73c7c5	196	const struct v4l2_tuner *v)
7002a4f3	197	{
13099294	198	return v->index ? -EINVAL : 0;
7002a4f3	199	}
5aff308c	200
7002a4f3	201	static int vidioc_s_frequency(struct file file, void priv,
b530a447	202	const struct v4l2_frequency *f)
7002a4f3	203	{
c170ecf4	204	struct dsbr100_device *radio = video_drvdata(file);
1da177e4	205
5d778648 HV	206	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
5d778648 HV	207	return -EINVAL;
fdf9c997	208
5d778648 HV	209	return dsbr100_setfreq(radio, clamp_t(unsigned, f->frequency,
5d778648 HV	210	FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
7002a4f3	211	}
5aff308c	212
7002a4f3 DL	213	static int vidioc_g_frequency(struct file file, void priv,
	214	struct v4l2_frequency *f)
	215	{
c170ecf4	216	struct dsbr100_device *radio = video_drvdata(file);
5aff308c	217
5d778648 HV	218	if (f->tuner)
5d778648 HV	219	return -EINVAL;
7002a4f3 DL	220	f->type = V4L2_TUNER_RADIO;
	221	f->frequency = radio->curfreq;
	222	return 0;
	223	}
5aff308c	224
5d778648	225	static int usb_dsbr100_s_ctrl(struct v4l2_ctrl *ctrl)
7002a4f3	226	{
5d778648 HV	227	struct dsbr100_device *radio =
5d778648 HV	228	container_of(ctrl->handler, struct dsbr100_device, hdl);
1da177e4	229
7002a4f3 DL	230	switch (ctrl->id) {
7002a4f3 DL	231	case V4L2_CID_AUDIO_MUTE:
5d778648 HV	232	radio->muted = ctrl->val;
5d778648 HV	233	return radio->muted ? dsbr100_stop(radio) : dsbr100_start(radio);
7002a4f3 DL	234	}
	235	return -EINVAL;
	236	}
5aff308c	237
1da177e4	238
e64d07c9 HV	239	/* USB subsystem interface begins here */
	240
	241	/*
	242	* Handle unplugging of the device.
	243	* We call video_unregister_device in any case.
	244	* The last function called in this procedure is
	245	* usb_dsbr100_video_device_release
	246	*/
	247	static void usb_dsbr100_disconnect(struct usb_interface *intf)
	248	{
	249	struct dsbr100_device *radio = usb_get_intfdata(intf);
	250
e64d07c9	251	mutex_lock(&radio->v4l2_lock);
5d778648 HV	252	/*
	253	* Disconnect is also called on unload, and in that case we need to
	254	* mute the device. This call will silently fail if it is called
	255	* after a physical disconnect.
	256	*/
	257	usb_control_msg(radio->usbdev,
	258	usb_rcvctrlpipe(radio->usbdev, 0),
	259	DSB100_ONOFF,
	260	USB_TYPE_VENDOR \| USB_RECIP_DEVICE \| USB_DIR_IN,
	261	0x00, 0x00, radio->transfer_buffer, 8, 300);
13099294	262	usb_set_intfdata(intf, NULL);
e64d07c9 HV	263	video_unregister_device(&radio->videodev);
e64d07c9 HV	264	v4l2_device_disconnect(&radio->v4l2_dev);
13099294 HV	265	mutex_unlock(&radio->v4l2_lock);
13099294 HV	266	v4l2_device_put(&radio->v4l2_dev);
e64d07c9 HV	267	}
	268
	269
04e0ffbb AK	270	/* Suspend device - stop device. */
	271	static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
	272	{
	273	struct dsbr100_device *radio = usb_get_intfdata(intf);
04e0ffbb	274
e64d07c9	275	mutex_lock(&radio->v4l2_lock);
5d778648 HV	276	if (!radio->muted && dsbr100_stop(radio) < 0)
5d778648 HV	277	dev_warn(&intf->dev, "dsbr100_stop failed\n");
e64d07c9	278	mutex_unlock(&radio->v4l2_lock);
04e0ffbb AK	279
04e0ffbb AK	280	dev_info(&intf->dev, "going into suspend..\n");
04e0ffbb AK	281	return 0;
	282	}
	283
	284	/* Resume device - start device. */
	285	static int usb_dsbr100_resume(struct usb_interface *intf)
	286	{
	287	struct dsbr100_device *radio = usb_get_intfdata(intf);
04e0ffbb	288
e64d07c9	289	mutex_lock(&radio->v4l2_lock);
5d778648 HV	290	if (!radio->muted && dsbr100_start(radio) < 0)
5d778648 HV	291	dev_warn(&intf->dev, "dsbr100_start failed\n");
e64d07c9	292	mutex_unlock(&radio->v4l2_lock);
04e0ffbb AK	293
04e0ffbb AK	294	dev_info(&intf->dev, "coming out of suspend..\n");
04e0ffbb AK	295	return 0;
	296	}
	297
fc55bcb0	298	/* free data structures */
13099294	299	static void usb_dsbr100_release(struct v4l2_device *v4l2_dev)
3a0efc32	300	{
13099294	301	struct dsbr100_device *radio = v4l2_dev_to_radio(v4l2_dev);
3a0efc32	302
5d778648	303	v4l2_ctrl_handler_free(&radio->hdl);
406827cc	304	v4l2_device_unregister(&radio->v4l2_dev);
3a0efc32 AK	305	kfree(radio->transfer_buffer);
	306	kfree(radio);
	307	}
	308
5d778648 HV	309	static const struct v4l2_ctrl_ops usb_dsbr100_ctrl_ops = {
	310	.s_ctrl = usb_dsbr100_s_ctrl,
	311	};
	312
7002a4f3	313	/* File system interface */
bec43661	314	static const struct v4l2_file_operations usb_dsbr100_fops = {
7002a4f3	315	.owner = THIS_MODULE,
e64d07c9	316	.unlocked_ioctl = video_ioctl2,
5d778648 HV	317	.open = v4l2_fh_open,
	318	.release = v4l2_fh_release,
	319	.poll = v4l2_ctrl_poll,
7002a4f3 DL	320	};
7002a4f3 DL	321
a399810c	322	static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
7002a4f3 DL	323	.vidioc_querycap = vidioc_querycap,
	324	.vidioc_g_tuner = vidioc_g_tuner,
	325	.vidioc_s_tuner = vidioc_s_tuner,
	326	.vidioc_g_frequency = vidioc_g_frequency,
	327	.vidioc_s_frequency = vidioc_s_frequency,
5d778648 HV	328	.vidioc_log_status = v4l2_ctrl_log_status,
	329	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	330	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
7002a4f3 DL	331	};
7002a4f3 DL	332
fc55bcb0	333	/* check if the device is present and register with v4l and usb if it is */
7002a4f3 DL	334	static int usb_dsbr100_probe(struct usb_interface *intf,
	335	const struct usb_device_id *id)
	336	{
	337	struct dsbr100_device *radio;
406827cc	338	struct v4l2_device *v4l2_dev;
417b7953	339	int retval;
7002a4f3	340
406827cc	341	radio = kzalloc(sizeof(struct dsbr100_device), GFP_KERNEL);
223377e7 AK	342
223377e7 AK	343	if (!radio)
7002a4f3	344	return -ENOMEM;
223377e7 AK	345
	346	radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
	347
	348	if (!(radio->transfer_buffer)) {
863c86dd ON	349	kfree(radio);
	350	return -ENOMEM;
	351	}
223377e7	352
406827cc	353	v4l2_dev = &radio->v4l2_dev;
13099294	354	v4l2_dev->release = usb_dsbr100_release;
406827cc AK	355
	356	retval = v4l2_device_register(&intf->dev, v4l2_dev);
	357	if (retval < 0) {
	358	v4l2_err(v4l2_dev, "couldn't register v4l2_device\n");
5d778648	359	goto err_reg_dev;
406827cc AK	360	}
406827cc AK	361
5d778648 HV	362	v4l2_ctrl_handler_init(&radio->hdl, 1);
	363	v4l2_ctrl_new_std(&radio->hdl, &usb_dsbr100_ctrl_ops,
	364	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
	365	if (radio->hdl.error) {
	366	retval = radio->hdl.error;
	367	v4l2_err(v4l2_dev, "couldn't register control\n");
	368	goto err_reg_ctrl;
	369	}
e64d07c9	370	mutex_init(&radio->v4l2_lock);
c0decac1 MCC	371	strscpy(radio->videodev.name, v4l2_dev->name,
c0decac1 MCC	372	sizeof(radio->videodev.name));
406827cc AK	373	radio->videodev.v4l2_dev = v4l2_dev;
	374	radio->videodev.fops = &usb_dsbr100_fops;
	375	radio->videodev.ioctl_ops = &usb_dsbr100_ioctl_ops;
13099294	376	radio->videodev.release = video_device_release_empty;
e64d07c9	377	radio->videodev.lock = &radio->v4l2_lock;
5d778648	378	radio->videodev.ctrl_handler = &radio->hdl;
e83ce300	379	radio->videodev.device_caps = V4L2_CAP_RADIO \| V4L2_CAP_TUNER;
3a0efc32	380
7002a4f3	381	radio->usbdev = interface_to_usbdev(intf);
223377e7	382	radio->curfreq = FREQ_MIN * FREQ_MUL;
5d778648	383	radio->muted = true;
406827cc	384
3a0efc32	385	video_set_drvdata(&radio->videodev, radio);
5d778648	386	usb_set_intfdata(intf, radio);
406827cc	387
417b7953	388	retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
5d778648 HV	389	if (retval == 0)
	390	return 0;
	391	v4l2_err(v4l2_dev, "couldn't register video device\n");
	392
	393	err_reg_ctrl:
	394	v4l2_ctrl_handler_free(&radio->hdl);
	395	v4l2_device_unregister(v4l2_dev);
	396	err_reg_dev:
	397	kfree(radio->transfer_buffer);
	398	kfree(radio);
	399	return retval;
7002a4f3 DL	400	}
7002a4f3 DL	401
1ab2234e	402	static const struct usb_device_id usb_dsbr100_device_table[] = {
5d778648 HV	403	{ USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
	404	{ } /* Terminating entry */
	405	};
1da177e4	406
5d778648 HV	407	MODULE_DEVICE_TABLE(usb, usb_dsbr100_device_table);
	408
	409	/* USB subsystem interface */
	410	static struct usb_driver usb_dsbr100_driver = {
	411	.name = "dsbr100",
	412	.probe = usb_dsbr100_probe,
	413	.disconnect = usb_dsbr100_disconnect,
	414	.id_table = usb_dsbr100_device_table,
	415	.suspend = usb_dsbr100_suspend,
	416	.resume = usb_dsbr100_resume,
	417	.reset_resume = usb_dsbr100_resume,
	418	};
	419
	420	module_usb_driver(usb_dsbr100_driver);