drivers/media/radio/radio-shark.c - maze/linux - Git at Google

 /*
  * Linux V4L2 radio driver for the Griffin radioSHARK USB radio receiver
  *
  * Note the radioSHARK offers the audio through a regular USB audio device,
  * this driver only handles the tuning.
  *
  * The info necessary to drive the shark was taken from the small userspace
  * shark.c program by Michael Rolig, which he kindly placed in the Public
  * Domain.
  *
  * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/leds.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/workqueue.h>
 #include <media/v4l2-device.h>
 #include <media/tea575x.h>

 #if defined(CONFIG_LEDS_CLASS) || \
     (defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK_MODULE))
 #define SHARK_USE_LEDS 1
 #endif

 /*
  * Version Information
  */
 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 MODULE_DESCRIPTION("Griffin radioSHARK, USB radio receiver driver");
 MODULE_LICENSE("GPL");

 #define SHARK_IN_EP		0x83
 #define SHARK_OUT_EP		0x05

 #define TEA575X_BIT_MONO	(1<<22)		/* 0 = stereo, 1 = mono */
 #define TEA575X_BIT_BAND_MASK	(3<<20)
 #define TEA575X_BIT_BAND_FM	(0<<20)

 #define TB_LEN 6
 #define DRV_NAME "radioshark"

 #define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)

 /* Note BLUE_IS_PULSE comes after NO_LEDS as it is a status bit, not a LED */
 enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS, BLUE_IS_PULSE };

 struct shark_device {
 	struct usb_device *usbdev;
 	struct v4l2_device v4l2_dev;
 	struct snd_tea575x tea;

 #ifdef SHARK_USE_LEDS
 	struct work_struct led_work;
 	struct led_classdev leds[NO_LEDS];
 	char led_names[NO_LEDS][32];
 	atomic_t brightness[NO_LEDS];
 	unsigned long brightness_new;
 #endif

 	u8 *transfer_buffer;
 	u32 last_val;
 };

 static atomic_t shark_instance = ATOMIC_INIT(0);

 static void shark_write_val(struct snd_tea575x *tea, u32 val)
 {
 	struct shark_device *shark = tea->private_data;
 	int i, res, actual_len;

 	/* Avoid unnecessary (slow) USB transfers */
 	if (shark->last_val == val)
 		return;

 	memset(shark->transfer_buffer, 0, TB_LEN);
 	shark->transfer_buffer[0] = 0xc0; /* Write shift register command */
 	for (i = 0; i < 4; i++)
 		shark->transfer_buffer[i] |= (val >> (24 - i * 8)) & 0xff;

 	res = usb_interrupt_msg(shark->usbdev,
 				usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
 				shark->transfer_buffer, TB_LEN,
 				&actual_len, 1000);
 	if (res >= 0)
 		shark->last_val = val;
 	else
 		v4l2_err(&shark->v4l2_dev, "set-freq error: %d\n", res);
 }

 static u32 shark_read_val(struct snd_tea575x *tea)
 {
 	struct shark_device *shark = tea->private_data;
 	int i, res, actual_len;
 	u32 val = 0;

 	memset(shark->transfer_buffer, 0, TB_LEN);
 	shark->transfer_buffer[0] = 0x80;
 	res = usb_interrupt_msg(shark->usbdev,
 				usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
 				shark->transfer_buffer, TB_LEN,
 				&actual_len, 1000);
 	if (res < 0) {
 		v4l2_err(&shark->v4l2_dev, "request-status error: %d\n", res);
 		return shark->last_val;
 	}

 	res = usb_interrupt_msg(shark->usbdev,
 				usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
 				shark->transfer_buffer, TB_LEN,
 				&actual_len, 1000);
 	if (res < 0) {
 		v4l2_err(&shark->v4l2_dev, "get-status error: %d\n", res);
 		return shark->last_val;
 	}

 	for (i = 0; i < 4; i++)
 		val |= shark->transfer_buffer[i] << (24 - i * 8);

 	shark->last_val = val;

 	/*
 	 * The shark does not allow actually reading the stereo / mono pin :(
 	 * So assume that when we're tuned to an FM station and mono has not
 	 * been requested, that we're receiving stereo.
 	 */
 	if (((val & TEA575X_BIT_BAND_MASK) == TEA575X_BIT_BAND_FM) &&
 	    !(val & TEA575X_BIT_MONO))
 		shark->tea.stereo = true;
 	else
 		shark->tea.stereo = false;

 	return val;
 }

 static struct snd_tea575x_ops shark_tea_ops = {
 	.write_val = shark_write_val,
 	.read_val  = shark_read_val,
 };

 #ifdef SHARK_USE_LEDS
 static void shark_led_work(struct work_struct *work)
 {
 	struct shark_device *shark =
 		container_of(work, struct shark_device, led_work);
 	int i, res, brightness, actual_len;

 	for (i = 0; i < 3; i++) {
 		if (!test_and_clear_bit(i, &shark->brightness_new))
 			continue;

 		brightness = atomic_read(&shark->brightness[i]);
 		memset(shark->transfer_buffer, 0, TB_LEN);
 		if (i != RED_LED) {
 			shark->transfer_buffer[0] = 0xA0 + i;
 			shark->transfer_buffer[1] = brightness;
 		} else
 			shark->transfer_buffer[0] = brightness ? 0xA9 : 0xA8;
 		res = usb_interrupt_msg(shark->usbdev,
 					usb_sndintpipe(shark->usbdev, 0x05),
 					shark->transfer_buffer, TB_LEN,
 					&actual_len, 1000);
 		if (res < 0)
 			v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
 				 shark->led_names[i], res);
 	}
 }

 static void shark_led_set_blue(struct led_classdev *led_cdev,
 			       enum led_brightness value)
 {
 	struct shark_device *shark =
 		container_of(led_cdev, struct shark_device, leds[BLUE_LED]);

 	atomic_set(&shark->brightness[BLUE_LED], value);
 	set_bit(BLUE_LED, &shark->brightness_new);
 	clear_bit(BLUE_IS_PULSE, &shark->brightness_new);
 	schedule_work(&shark->led_work);
 }

 static void shark_led_set_blue_pulse(struct led_classdev *led_cdev,
 				     enum led_brightness value)
 {
 	struct shark_device *shark = container_of(led_cdev,
 				struct shark_device, leds[BLUE_PULSE_LED]);

 	atomic_set(&shark->brightness[BLUE_PULSE_LED], 256 - value);
 	set_bit(BLUE_PULSE_LED, &shark->brightness_new);
 	set_bit(BLUE_IS_PULSE, &shark->brightness_new);
 	schedule_work(&shark->led_work);
 }

 static void shark_led_set_red(struct led_classdev *led_cdev,
 			      enum led_brightness value)
 {
 	struct shark_device *shark =
 		container_of(led_cdev, struct shark_device, leds[RED_LED]);

 	atomic_set(&shark->brightness[RED_LED], value);
 	set_bit(RED_LED, &shark->brightness_new);
 	schedule_work(&shark->led_work);
 }

 static const struct led_classdev shark_led_templates[NO_LEDS] = {
 	[BLUE_LED] = {
 		.name		= "%s:blue:",
 		.brightness	= LED_OFF,
 		.max_brightness = 127,
 		.brightness_set = shark_led_set_blue,
 	},
 	[BLUE_PULSE_LED] = {
 		.name		= "%s:blue-pulse:",
 		.brightness	= LED_OFF,
 		.max_brightness = 255,
 		.brightness_set = shark_led_set_blue_pulse,
 	},
 	[RED_LED] = {
 		.name		= "%s:red:",
 		.brightness	= LED_OFF,
 		.max_brightness = 1,
 		.brightness_set = shark_led_set_red,
 	},
 };

 static int shark_register_leds(struct shark_device *shark, struct device *dev)
 {
 	int i, retval;

 	atomic_set(&shark->brightness[BLUE_LED], 127);
 	INIT_WORK(&shark->led_work, shark_led_work);
 	for (i = 0; i < NO_LEDS; i++) {
 		shark->leds[i] = shark_led_templates[i];
 		snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
 			 shark->leds[i].name, shark->v4l2_dev.name);
 		shark->leds[i].name = shark->led_names[i];
 		retval = led_classdev_register(dev, &shark->leds[i]);
 		if (retval) {
 			v4l2_err(&shark->v4l2_dev,
 				 "couldn't register led: %s\n",
 				 shark->led_names[i]);
 			return retval;
 		}
 	}
 	return 0;
 }

 static void shark_unregister_leds(struct shark_device *shark)
 {
 	int i;

 	for (i = 0; i < NO_LEDS; i++)
 		led_classdev_unregister(&shark->leds[i]);

 	cancel_work_sync(&shark->led_work);
 }

 static inline void shark_resume_leds(struct shark_device *shark)
 {
 	if (test_bit(BLUE_IS_PULSE, &shark->brightness_new))
 		set_bit(BLUE_PULSE_LED, &shark->brightness_new);
 	else
 		set_bit(BLUE_LED, &shark->brightness_new);
 	set_bit(RED_LED, &shark->brightness_new);
 	schedule_work(&shark->led_work);
 }
 #else
 static int shark_register_leds(struct shark_device *shark, struct device *dev)
 {
 	v4l2_warn(&shark->v4l2_dev,
 		  "CONFIG_LEDS_CLASS not enabled, LED support disabled\n");
 	return 0;
 }
 static inline void shark_unregister_leds(struct shark_device *shark) { }
 static inline void shark_resume_leds(struct shark_device *shark) { }
 #endif

 static void usb_shark_disconnect(struct usb_interface *intf)
 {
 	struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
 	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

 	mutex_lock(&shark->tea.mutex);
 	v4l2_device_disconnect(&shark->v4l2_dev);
 	snd_tea575x_exit(&shark->tea);
 	mutex_unlock(&shark->tea.mutex);

 	shark_unregister_leds(shark);

 	v4l2_device_put(&shark->v4l2_dev);
 }

 static void usb_shark_release(struct v4l2_device *v4l2_dev)
 {
 	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

 	v4l2_device_unregister(&shark->v4l2_dev);
 	kfree(shark->transfer_buffer);
 	kfree(shark);
 }

 static int usb_shark_probe(struct usb_interface *intf,
 			   const struct usb_device_id *id)
 {
 	struct shark_device *shark;
 	int retval = -ENOMEM;

 	shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
 	if (!shark)
 		return retval;

 	shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
 	if (!shark->transfer_buffer)
 		goto err_alloc_buffer;

 	v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);

 	retval = shark_register_leds(shark, &intf->dev);
 	if (retval)
 		goto err_reg_leds;

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

 	shark->usbdev = interface_to_usbdev(intf);
 	shark->tea.v4l2_dev = &shark->v4l2_dev;
 	shark->tea.private_data = shark;
 	shark->tea.radio_nr = -1;
 	shark->tea.ops = &shark_tea_ops;
 	shark->tea.cannot_mute = true;
 	shark->tea.has_am = true;
 	strlcpy(shark->tea.card, "Griffin radioSHARK",
 		sizeof(shark->tea.card));
 	usb_make_path(shark->usbdev, shark->tea.bus_info,
 		sizeof(shark->tea.bus_info));

 	retval = snd_tea575x_init(&shark->tea, THIS_MODULE);
 	if (retval) {
 		v4l2_err(&shark->v4l2_dev, "couldn't init tea5757\n");
 		goto err_init_tea;
 	}

 	return 0;

 err_init_tea:
 	v4l2_device_unregister(&shark->v4l2_dev);
 err_reg_dev:
 	shark_unregister_leds(shark);
 err_reg_leds:
 	kfree(shark->transfer_buffer);
 err_alloc_buffer:
 	kfree(shark);

 	return retval;
 }

 #ifdef CONFIG_PM
 static int usb_shark_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	return 0;
 }

 static int usb_shark_resume(struct usb_interface *intf)
 {
 	struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
 	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

 	mutex_lock(&shark->tea.mutex);
 	snd_tea575x_set_freq(&shark->tea);
 	mutex_unlock(&shark->tea.mutex);

 	shark_resume_leds(shark);

 	return 0;
 }
 #endif

 /* Specify the bcdDevice value, as the radioSHARK and radioSHARK2 share ids */
 static struct usb_device_id usb_shark_device_table[] = {
 	{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
 			 USB_DEVICE_ID_MATCH_INT_CLASS,
 	  .idVendor     = 0x077d,
 	  .idProduct    = 0x627a,
 	  .bcdDevice_lo = 0x0001,
 	  .bcdDevice_hi = 0x0001,
 	  .bInterfaceClass = 3,
 	},
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, usb_shark_device_table);

 static struct usb_driver usb_shark_driver = {
 	.name			= DRV_NAME,
 	.probe			= usb_shark_probe,
 	.disconnect		= usb_shark_disconnect,
 	.id_table		= usb_shark_device_table,
 #ifdef CONFIG_PM
 	.suspend		= usb_shark_suspend,
 	.resume			= usb_shark_resume,
 	.reset_resume		= usb_shark_resume,
 #endif
 };
 module_usb_driver(usb_shark_driver);
	/*
	* Linux V4L2 radio driver for the Griffin radioSHARK USB radio receiver
	*
	* Note the radioSHARK offers the audio through a regular USB audio device,
	* this driver only handles the tuning.
	*
	* The info necessary to drive the shark was taken from the small userspace
	* shark.c program by Michael Rolig, which he kindly placed in the Public
	* Domain.
	*
	* Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/

	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/leds.h>
	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/usb.h>
	#include <linux/workqueue.h>
	#include <media/v4l2-device.h>
	#include <media/tea575x.h>

	#if defined(CONFIG_LEDS_CLASS) \|\| \
	(defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK_MODULE))
	#define SHARK_USE_LEDS 1
	#endif

	/*
	* Version Information
	*/
	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	MODULE_DESCRIPTION("Griffin radioSHARK, USB radio receiver driver");
	MODULE_LICENSE("GPL");

	#define SHARK_IN_EP 0x83
	#define SHARK_OUT_EP 0x05

	#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
	#define TEA575X_BIT_BAND_MASK (3<<20)
	#define TEA575X_BIT_BAND_FM (0<<20)

	#define TB_LEN 6
	#define DRV_NAME "radioshark"

	#define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)

	/* Note BLUE_IS_PULSE comes after NO_LEDS as it is a status bit, not a LED */
	enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS, BLUE_IS_PULSE };

	struct shark_device {
	struct usb_device *usbdev;
	struct v4l2_device v4l2_dev;
	struct snd_tea575x tea;

	#ifdef SHARK_USE_LEDS
	struct work_struct led_work;
	struct led_classdev leds[NO_LEDS];
	char led_names[NO_LEDS][32];
	atomic_t brightness[NO_LEDS];
	unsigned long brightness_new;
	#endif

	u8 *transfer_buffer;
	u32 last_val;
	};

	static atomic_t shark_instance = ATOMIC_INIT(0);

	static void shark_write_val(struct snd_tea575x *tea, u32 val)
	{
	struct shark_device *shark = tea->private_data;
	int i, res, actual_len;

	/* Avoid unnecessary (slow) USB transfers */
	if (shark->last_val == val)
	return;

	memset(shark->transfer_buffer, 0, TB_LEN);
	shark->transfer_buffer[0] = 0xc0; /* Write shift register command */
	for (i = 0; i < 4; i++)
	shark->transfer_buffer[i] \|= (val >> (24 - i * 8)) & 0xff;

	res = usb_interrupt_msg(shark->usbdev,
	usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
	shark->transfer_buffer, TB_LEN,
	&actual_len, 1000);
	if (res >= 0)
	shark->last_val = val;
	else
	v4l2_err(&shark->v4l2_dev, "set-freq error: %d\n", res);
	}

	static u32 shark_read_val(struct snd_tea575x *tea)
	{
	struct shark_device *shark = tea->private_data;
	int i, res, actual_len;
	u32 val = 0;

	memset(shark->transfer_buffer, 0, TB_LEN);
	shark->transfer_buffer[0] = 0x80;
	res = usb_interrupt_msg(shark->usbdev,
	usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
	shark->transfer_buffer, TB_LEN,
	&actual_len, 1000);
	if (res < 0) {
	v4l2_err(&shark->v4l2_dev, "request-status error: %d\n", res);
	return shark->last_val;
	}

	res = usb_interrupt_msg(shark->usbdev,
	usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
	shark->transfer_buffer, TB_LEN,
	&actual_len, 1000);
	if (res < 0) {
	v4l2_err(&shark->v4l2_dev, "get-status error: %d\n", res);
	return shark->last_val;
	}

	for (i = 0; i < 4; i++)
	val \|= shark->transfer_buffer[i] << (24 - i * 8);

	shark->last_val = val;

	/*
	* The shark does not allow actually reading the stereo / mono pin :(
	* So assume that when we're tuned to an FM station and mono has not
	* been requested, that we're receiving stereo.
	*/
	if (((val & TEA575X_BIT_BAND_MASK) == TEA575X_BIT_BAND_FM) &&
	!(val & TEA575X_BIT_MONO))
	shark->tea.stereo = true;
	else
	shark->tea.stereo = false;

	return val;
	}

	static struct snd_tea575x_ops shark_tea_ops = {
	.write_val = shark_write_val,
	.read_val = shark_read_val,
	};

	#ifdef SHARK_USE_LEDS
	static void shark_led_work(struct work_struct *work)
	{
	struct shark_device *shark =
	container_of(work, struct shark_device, led_work);
	int i, res, brightness, actual_len;

	for (i = 0; i < 3; i++) {
	if (!test_and_clear_bit(i, &shark->brightness_new))
	continue;

	brightness = atomic_read(&shark->brightness[i]);
	memset(shark->transfer_buffer, 0, TB_LEN);
	if (i != RED_LED) {
	shark->transfer_buffer[0] = 0xA0 + i;
	shark->transfer_buffer[1] = brightness;
	} else
	shark->transfer_buffer[0] = brightness ? 0xA9 : 0xA8;
	res = usb_interrupt_msg(shark->usbdev,
	usb_sndintpipe(shark->usbdev, 0x05),
	shark->transfer_buffer, TB_LEN,
	&actual_len, 1000);
	if (res < 0)
	v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
	shark->led_names[i], res);
	}
	}

	static void shark_led_set_blue(struct led_classdev *led_cdev,
	enum led_brightness value)
	{
	struct shark_device *shark =
	container_of(led_cdev, struct shark_device, leds[BLUE_LED]);

	atomic_set(&shark->brightness[BLUE_LED], value);
	set_bit(BLUE_LED, &shark->brightness_new);
	clear_bit(BLUE_IS_PULSE, &shark->brightness_new);
	schedule_work(&shark->led_work);
	}

	static void shark_led_set_blue_pulse(struct led_classdev *led_cdev,
	enum led_brightness value)
	{
	struct shark_device *shark = container_of(led_cdev,
	struct shark_device, leds[BLUE_PULSE_LED]);

	atomic_set(&shark->brightness[BLUE_PULSE_LED], 256 - value);
	set_bit(BLUE_PULSE_LED, &shark->brightness_new);
	set_bit(BLUE_IS_PULSE, &shark->brightness_new);
	schedule_work(&shark->led_work);
	}

	static void shark_led_set_red(struct led_classdev *led_cdev,
	enum led_brightness value)
	{
	struct shark_device *shark =
	container_of(led_cdev, struct shark_device, leds[RED_LED]);

	atomic_set(&shark->brightness[RED_LED], value);
	set_bit(RED_LED, &shark->brightness_new);
	schedule_work(&shark->led_work);
	}

	static const struct led_classdev shark_led_templates[NO_LEDS] = {
	[BLUE_LED] = {
	.name = "%s:blue:",
	.brightness = LED_OFF,
	.max_brightness = 127,
	.brightness_set = shark_led_set_blue,
	},
	[BLUE_PULSE_LED] = {
	.name = "%s:blue-pulse:",
	.brightness = LED_OFF,
	.max_brightness = 255,
	.brightness_set = shark_led_set_blue_pulse,
	},
	[RED_LED] = {
	.name = "%s:red:",
	.brightness = LED_OFF,
	.max_brightness = 1,
	.brightness_set = shark_led_set_red,
	},
	};

	static int shark_register_leds(struct shark_device shark, struct device dev)
	{
	int i, retval;

	atomic_set(&shark->brightness[BLUE_LED], 127);
	INIT_WORK(&shark->led_work, shark_led_work);
	for (i = 0; i < NO_LEDS; i++) {
	shark->leds[i] = shark_led_templates[i];
	snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
	shark->leds[i].name, shark->v4l2_dev.name);
	shark->leds[i].name = shark->led_names[i];
	retval = led_classdev_register(dev, &shark->leds[i]);
	if (retval) {
	v4l2_err(&shark->v4l2_dev,
	"couldn't register led: %s\n",
	shark->led_names[i]);
	return retval;
	}
	}
	return 0;
	}

	static void shark_unregister_leds(struct shark_device *shark)
	{
	int i;

	for (i = 0; i < NO_LEDS; i++)
	led_classdev_unregister(&shark->leds[i]);

	cancel_work_sync(&shark->led_work);
	}

	static inline void shark_resume_leds(struct shark_device *shark)
	{
	if (test_bit(BLUE_IS_PULSE, &shark->brightness_new))
	set_bit(BLUE_PULSE_LED, &shark->brightness_new);
	else
	set_bit(BLUE_LED, &shark->brightness_new);
	set_bit(RED_LED, &shark->brightness_new);
	schedule_work(&shark->led_work);
	}
	#else
	static int shark_register_leds(struct shark_device shark, struct device dev)
	{
	v4l2_warn(&shark->v4l2_dev,
	"CONFIG_LEDS_CLASS not enabled, LED support disabled\n");
	return 0;
	}
	static inline void shark_unregister_leds(struct shark_device *shark) { }
	static inline void shark_resume_leds(struct shark_device *shark) { }
	#endif

	static void usb_shark_disconnect(struct usb_interface *intf)
	{
	struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

	mutex_lock(&shark->tea.mutex);
	v4l2_device_disconnect(&shark->v4l2_dev);
	snd_tea575x_exit(&shark->tea);
	mutex_unlock(&shark->tea.mutex);

	shark_unregister_leds(shark);

	v4l2_device_put(&shark->v4l2_dev);
	}

	static void usb_shark_release(struct v4l2_device *v4l2_dev)
	{
	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

	v4l2_device_unregister(&shark->v4l2_dev);
	kfree(shark->transfer_buffer);
	kfree(shark);
	}

	static int usb_shark_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct shark_device *shark;
	int retval = -ENOMEM;

	shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
	if (!shark)
	return retval;

	shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
	if (!shark->transfer_buffer)
	goto err_alloc_buffer;

	v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);

	retval = shark_register_leds(shark, &intf->dev);
	if (retval)
	goto err_reg_leds;

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

	shark->usbdev = interface_to_usbdev(intf);
	shark->tea.v4l2_dev = &shark->v4l2_dev;
	shark->tea.private_data = shark;
	shark->tea.radio_nr = -1;
	shark->tea.ops = &shark_tea_ops;
	shark->tea.cannot_mute = true;
	shark->tea.has_am = true;
	strlcpy(shark->tea.card, "Griffin radioSHARK",
	sizeof(shark->tea.card));
	usb_make_path(shark->usbdev, shark->tea.bus_info,
	sizeof(shark->tea.bus_info));

	retval = snd_tea575x_init(&shark->tea, THIS_MODULE);
	if (retval) {
	v4l2_err(&shark->v4l2_dev, "couldn't init tea5757\n");
	goto err_init_tea;
	}

	return 0;

	err_init_tea:
	v4l2_device_unregister(&shark->v4l2_dev);
	err_reg_dev:
	shark_unregister_leds(shark);
	err_reg_leds:
	kfree(shark->transfer_buffer);
	err_alloc_buffer:
	kfree(shark);

	return retval;
	}

	#ifdef CONFIG_PM
	static int usb_shark_suspend(struct usb_interface *intf, pm_message_t message)
	{
	return 0;
	}

	static int usb_shark_resume(struct usb_interface *intf)
	{
	struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
	struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);

	mutex_lock(&shark->tea.mutex);
	snd_tea575x_set_freq(&shark->tea);
	mutex_unlock(&shark->tea.mutex);

	shark_resume_leds(shark);

	return 0;
	}
	#endif

	/* Specify the bcdDevice value, as the radioSHARK and radioSHARK2 share ids */
	static struct usb_device_id usb_shark_device_table[] = {
	{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION \|
	USB_DEVICE_ID_MATCH_INT_CLASS,
	.idVendor = 0x077d,
	.idProduct = 0x627a,
	.bcdDevice_lo = 0x0001,
	.bcdDevice_hi = 0x0001,
	.bInterfaceClass = 3,
	},
	{ }
	};
	MODULE_DEVICE_TABLE(usb, usb_shark_device_table);

	static struct usb_driver usb_shark_driver = {
	.name = DRV_NAME,
	.probe = usb_shark_probe,
	.disconnect = usb_shark_disconnect,
	.id_table = usb_shark_device_table,
	#ifdef CONFIG_PM
	.suspend = usb_shark_suspend,
	.resume = usb_shark_resume,
	.reset_resume = usb_shark_resume,
	#endif
	};
	module_usb_driver(usb_shark_driver);