merge: http://linuxtv.org/hg/~dougsland/v4l

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 274 insertions, 108 deletions

diff --git a/linux/drivers/media/radio/dsbr100.c b/linux/drivers/media/radio/dsbr100.c
index d1865b164..9c8e96f81 100644
--- a/linux/drivers/media/radio/dsbr100.c
+++ b/linux/drivers/media/radio/dsbr100.c
@@ -1,5 +1,5 @@
-/* A driver for the D-Link DSB-R100 USB radio.  The R100 plugs
- into both the USB and an analog audio input, so this thing
+/* 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.
 
@@ -33,6 +33,10 @@
 
  History:
 
+ Version 0.44:
+	Add suspend/resume functions, fix unplug of device,
+	a lot of cleanups and fixes by Alexey Klimov <klimov.linux@gmail.com>
+
  Version 0.43:
 	Oliver Neukum: avoided DMA coherency issue
 
@@ -94,8 +98,8 @@
  */
 #include <linux/version.h>	/* for KERNEL_VERSION MACRO	*/
 
-#define DRIVER_VERSION "v0.43"
-#define RADIO_VERSION KERNEL_VERSION(0, 4, 3)
+#define DRIVER_VERSION "v0.44"
+#define RADIO_VERSION KERNEL_VERSION(0, 4, 4)
 
 static struct v4l2_queryctrl radio_qctrl[] = {
 	{
@@ -146,6 +150,7 @@ devices, that would be 76 and 91.  */
 #define FREQ_MAX 108.0
 #define FREQ_MUL 16000
 
+#define videodev_to_radio(d) container_of(d, struct dsbr100_device, videodev)
 
 static int usb_dsbr100_probe(struct usb_interface *intf,
 			     const struct usb_device_id *id);
@@ -162,8 +167,9 @@ module_param(radio_nr, int, 0);
 /* Data for one (physical) device */
 struct dsbr100_device {
 	struct usb_device *usbdev;
-	struct video_device *videodev;
+	struct video_device videodev;
 	u8 *transfer_buffer;
+	struct mutex lock;	/* buffer locking */
 	int curfreq;
 	int stereo;
 	int users;
@@ -171,7 +177,6 @@ struct dsbr100_device {
 	int muted;
 };
 
-
 static struct usb_device_id usb_dsbr100_device_table [] = {
 	{ USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
 	{ }						/* Terminating entry */
@@ -198,95 +203,190 @@ static struct usb_driver usb_dsbr100_driver = {
 /* switch on radio */
 static int dsbr100_start(struct dsbr100_device *radio)
 {
-	if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
-			USB_REQ_GET_STATUS,
-			USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
-			0x00, 0xC7, radio->transfer_buffer, 8, 300) < 0 ||
-	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) < 0)
-		return -1;
-	radio->muted=0;
+	int retval;
+	int request;
+
+	mutex_lock(&radio->lock);
+
+	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, 0xC7, radio->transfer_buffer, 8, 300);
+
+	if (retval < 0) {
+		request = USB_REQ_GET_STATUS;
+		goto usb_control_msg_failed;
+	}
+
+	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) {
+		request = DSB100_ONOFF;
+		goto usb_control_msg_failed;
+	}
+
+	radio->muted = 0;
+	mutex_unlock(&radio->lock);
 	return (radio->transfer_buffer)[0];
-}
 
+usb_control_msg_failed:
+	mutex_unlock(&radio->lock);
+	dev_err(&radio->usbdev->dev,
+		"%s - usb_control_msg returned %i, request %i\n",
+			__func__, retval, request);
+	return retval;
+
+}
 
 /* switch off radio */
 static int dsbr100_stop(struct dsbr100_device *radio)
 {
-	if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
-			USB_REQ_GET_STATUS,
-			USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
-			0x16, 0x1C, radio->transfer_buffer, 8, 300) < 0 ||
-	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) < 0)
-		return -1;
-	radio->muted=1;
+	int retval;
+	int request;
+
+	mutex_lock(&radio->lock);
+
+	retval = usb_control_msg(radio->usbdev,
+		usb_rcvctrlpipe(radio->usbdev, 0),
+		USB_REQ_GET_STATUS,
+		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+		0x16, 0x1C, radio->transfer_buffer, 8, 300);
+
+	if (retval < 0) {
+		request = USB_REQ_GET_STATUS;
+		goto usb_control_msg_failed;
+	}
+
+	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) {
+		request = DSB100_ONOFF;
+		goto usb_control_msg_failed;
+	}
+
+	radio->muted = 1;
+	mutex_unlock(&radio->lock);
 	return (radio->transfer_buffer)[0];
+
+usb_control_msg_failed:
+	mutex_unlock(&radio->lock);
+	dev_err(&radio->usbdev->dev,
+		"%s - usb_control_msg returned %i, request %i\n",
+			__func__, retval, request);
+	return retval;
+
 }
 
 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
 static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
 {
+	int retval;
+	int request;
+
 	freq = (freq / 16 * 80) / 1000 + 856;
-	if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
-			DSB100_TUNE,
-			USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
-			(freq >> 8) & 0x00ff, freq & 0xff,
-			radio->transfer_buffer, 8, 300) < 0 ||
-	   usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
-			USB_REQ_GET_STATUS,
-			USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
-			0x96, 0xB7, radio->transfer_buffer, 8, 300) < 0 ||
-	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) < 0) {
-		radio->stereo = -1;
-		return -1;
+	mutex_lock(&radio->lock);
+
+	retval = usb_control_msg(radio->usbdev,
+		usb_rcvctrlpipe(radio->usbdev, 0),
+		DSB100_TUNE,
+		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+		(freq >> 8) & 0x00ff, freq & 0xff,
+		radio->transfer_buffer, 8, 300);
+
+	if (retval < 0) {
+		request = DSB100_TUNE;
+		goto usb_control_msg_failed;
 	}
+
+	retval = usb_control_msg(radio->usbdev,
+		usb_rcvctrlpipe(radio->usbdev, 0),
+		USB_REQ_GET_STATUS,
+		USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+		0x96, 0xB7, radio->transfer_buffer, 8, 300);
+
+	if (retval < 0) {
+		request = USB_REQ_GET_STATUS;
+		goto usb_control_msg_failed;
+	}
+
+	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) {
+		request = USB_REQ_GET_STATUS;
+		goto usb_control_msg_failed;
+	}
+
 	radio->stereo = !((radio->transfer_buffer)[0] & 0x01);
+	mutex_unlock(&radio->lock);
 	return (radio->transfer_buffer)[0];
+
+usb_control_msg_failed:
+	radio->stereo = -1;
+	mutex_unlock(&radio->lock);
+	dev_err(&radio->usbdev->dev,
+		"%s - usb_control_msg returned %i, request %i\n",
+			__func__, retval, request);
+	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)
 {
-	if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
+	int retval;
+
+	mutex_lock(&radio->lock);
+
+	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) < 0)
+		0x00 , 0x24, radio->transfer_buffer, 8, 300);
+
+	if (retval < 0) {
 		radio->stereo = -1;
-	else
+		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);
-}
+	}
 
+	mutex_unlock(&radio->lock);
+}
 
 /* USB subsystem interface begins here */
 
-/* handle unplugging of the device, release data structures
-if nothing keeps us from doing it.  If something is still
-keeping us busy, the release callback of v4l will take care
-of releasing it. */
+/*
+ * 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);
 
 	usb_set_intfdata (intf, NULL);
-	if (radio) {
-		video_unregister_device(radio->videodev);
-		radio->videodev = NULL;
-		if (radio->users) {
-			kfree(radio->transfer_buffer);
-			kfree(radio);
-		} else {
-			radio->removed = 1;
-		}
-	}
+
+	mutex_lock(&radio->lock);
+	radio->removed = 1;
+	mutex_unlock(&radio->lock);
+
+	video_unregister_device(&radio->videodev);
 }
 
 
@@ -306,6 +406,10 @@ static int vidioc_g_tuner(struct file *file, void *priv,
 {
 	struct dsbr100_device *radio = video_drvdata(file);
 
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
+
 	if (v->index > 0)
 		return -EINVAL;
 
@@ -327,6 +431,12 @@ static int vidioc_g_tuner(struct file *file, void *priv,
 static int vidioc_s_tuner(struct file *file, void *priv,
 				struct v4l2_tuner *v)
 {
+	struct dsbr100_device *radio = video_drvdata(file);
+
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
+
 	if (v->index > 0)
 		return -EINVAL;
 
@@ -337,9 +447,15 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
 	struct dsbr100_device *radio = video_drvdata(file);
+	int retval;
+
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
 
 	radio->curfreq = f->frequency;
-	if (dsbr100_setfreq(radio, radio->curfreq) == -1)
+	retval = dsbr100_setfreq(radio, radio->curfreq);
+	if (retval < 0)
 		dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
 	return 0;
 }
@@ -349,6 +465,10 @@ static int vidioc_g_frequency(struct file *file, void *priv,
 {
 	struct dsbr100_device *radio = video_drvdata(file);
 
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
+
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = radio->curfreq;
 	return 0;
@@ -373,6 +493,10 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
 {
 	struct dsbr100_device *radio = video_drvdata(file);
 
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
+
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		ctrl->value = radio->muted;
@@ -385,17 +509,24 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
 	struct dsbr100_device *radio = video_drvdata(file);
+	int retval;
+
+	/* safety check */
+	if (radio->removed)
+		return -EIO;
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		if (ctrl->value) {
-			if (dsbr100_stop(radio) == -1) {
+			retval = dsbr100_stop(radio);
+			if (retval < 0) {
 				dev_warn(&radio->usbdev->dev,
 					 "Radio did not respond properly\n");
 				return -EBUSY;
 			}
 		} else {
-			if (dsbr100_start(radio) == -1) {
+			retval = dsbr100_start(radio);
+			if (retval < 0) {
 				dev_warn(&radio->usbdev->dev,
 					 "Radio did not respond properly\n");
 				return -EBUSY;
@@ -447,7 +578,8 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
 	radio->users = 1;
 	radio->muted = 1;
 
-	if (dsbr100_start(radio) < 0) {
+	retval = dsbr100_start(radio);
+	if (retval < 0) {
 		dev_warn(&radio->usbdev->dev,
 			 "Radio did not start up properly\n");
 		radio->users = 0;
@@ -456,9 +588,9 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
 	}
 
 	retval = dsbr100_setfreq(radio, radio->curfreq);
-
-	if (retval == -1)
-		printk(KERN_WARNING KBUILD_MODNAME ": Set frequency failed\n");
+	if (retval < 0)
+		dev_warn(&radio->usbdev->dev,
+			"set frequency failed\n");
 
 	unlock_kernel();
 	return 0;
@@ -467,13 +599,19 @@ static int usb_dsbr100_open(struct inode *inode, struct file *file)
 static int usb_dsbr100_close(struct inode *inode, struct file *file)
 {
 	struct dsbr100_device *radio = video_drvdata(file);
+	int retval;
 
 	if (!radio)
 		return -ENODEV;
+
 	radio->users = 0;
-	if (radio->removed) {
-		kfree(radio->transfer_buffer);
-		kfree(radio);
+	if (!radio->removed) {
+		retval = dsbr100_stop(radio);
+		if (retval < 0) {
+			dev_warn(&radio->usbdev->dev,
+				"dsbr100_stop failed\n");
+		}
+
 	}
 	return 0;
 }
@@ -485,7 +623,7 @@ static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
 	int retval;
 
 	retval = dsbr100_stop(radio);
-	if (retval == -1)
+	if (retval < 0)
 		dev_warn(&intf->dev, "dsbr100_stop failed\n");
 
 	dev_info(&intf->dev, "going into suspend..\n");
@@ -500,7 +638,7 @@ static int usb_dsbr100_resume(struct usb_interface *intf)
 	int retval;
 
 	retval = dsbr100_start(radio);
-	if (retval == -1)
+	if (retval < 0)
 		dev_warn(&intf->dev, "dsbr100_start failed\n");
 
 	dev_info(&intf->dev, "coming out of suspend..\n");
@@ -508,6 +646,15 @@ static int usb_dsbr100_resume(struct usb_interface *intf)
 	return 0;
 }
 
+/* free data structures */
+static void usb_dsbr100_video_device_release(struct video_device *videodev)
+{
+	struct dsbr100_device *radio = videodev_to_radio(videodev);
+
+	kfree(radio->transfer_buffer);
+	kfree(radio);
+}
+
 /* File system interface */
 static const struct file_operations usb_dsbr100_fops = {
 	.owner		= THIS_MODULE,
@@ -536,19 +683,19 @@ static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
 };
 
 /* V4L2 interface */
-static struct video_device dsbr100_videodev_template = {
+static struct video_device dsbr100_videodev_data = {
 	.name		= "D-Link DSB-R 100",
 	.fops		= &usb_dsbr100_fops,
 	.ioctl_ops 	= &usb_dsbr100_ioctl_ops,
-	.release	= video_device_release,
+	.release	= usb_dsbr100_video_device_release,
 };
 
-/* check if the device is present and register with v4l and
-usb if it is */
+/* 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;
+	int retval;
 
 	radio = kmalloc(sizeof(struct dsbr100_device), GFP_KERNEL);
 
@@ -561,23 +708,18 @@ static int usb_dsbr100_probe(struct usb_interface *intf,
 		kfree(radio);
 		return -ENOMEM;
 	}
-	radio->videodev = video_device_alloc();
 
-	if (!(radio->videodev)) {
-		kfree(radio->transfer_buffer);
-		kfree(radio);
-		return -ENOMEM;
-	}
-	memcpy(radio->videodev, &dsbr100_videodev_template,
-		sizeof(dsbr100_videodev_template));
+	mutex_init(&radio->lock);
+	radio->videodev = dsbr100_videodev_data;
+
 	radio->removed = 0;
 	radio->users = 0;
 	radio->usbdev = interface_to_usbdev(intf);
 	radio->curfreq = FREQ_MIN * FREQ_MUL;
-	video_set_drvdata(radio->videodev, radio);
-	if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr) < 0) {
-		dev_warn(&intf->dev, "Could not register video device\n");
-		video_device_release(radio->videodev);
+	video_set_drvdata(&radio->videodev, radio);
+	retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
+	if (retval < 0) {
+		dev_err(&intf->dev, "couldn't register video device\n");
 		kfree(radio->transfer_buffer);
 		kfree(radio);
 		return -EIO;
diff --git a/linux/drivers/media/radio/radio-mr800.c b/linux/drivers/media/radio/radio-mr800.c
index dbce57c26..7683af18d 100644
--- a/linux/drivers/media/radio/radio-mr800.c
+++ b/linux/drivers/media/radio/radio-mr800.c
@@ -142,7 +142,6 @@ struct amradio_device {
 
 	unsigned char *buffer;
 	struct mutex lock;	/* buffer locking */
-	struct mutex disconnect_lock;
 	int curfreq;
 	int stereo;
 	int users;
@@ -170,7 +169,7 @@ static struct usb_driver usb_amradio_driver = {
 	.reset_resume		= usb_amradio_resume,
 #endif
 	.id_table		= usb_amradio_device_table,
-	.supports_autosuspend	= 1,
+	.supports_autosuspend	= 0,
 };
 
 /* switch on radio. Send 8 bytes to device. */
@@ -305,16 +304,12 @@ static void usb_amradio_disconnect(struct usb_interface *intf)
 {
 	struct amradio_device *radio = usb_get_intfdata(intf);
 
-	mutex_lock(&radio->disconnect_lock);
+	mutex_lock(&radio->lock);
 	radio->removed = 1;
-	usb_set_intfdata(intf, NULL);
+	mutex_unlock(&radio->lock);
 
-	if (radio->users == 0) {
-		video_unregister_device(radio->videodev);
-		kfree(radio->buffer);
-		kfree(radio);
-	}
-	mutex_unlock(&radio->disconnect_lock);
+	usb_set_intfdata(intf, NULL);
+	video_unregister_device(radio->videodev);
 }
 
 /* vidioc_querycap - query device capabilities */
@@ -532,7 +527,7 @@ static int usb_amradio_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-/*close device - free driver structures */
+/*close device */
 static int usb_amradio_close(struct inode *inode, struct file *file)
 {
 	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
@@ -541,21 +536,15 @@ static int usb_amradio_close(struct inode *inode, struct file *file)
 	if (!radio)
 		return -ENODEV;
 
-	mutex_lock(&radio->disconnect_lock);
 	radio->users = 0;
-	if (radio->removed) {
-		video_unregister_device(radio->videodev);
-		kfree(radio->buffer);
-		kfree(radio);
 
-	} else {
+	if (!radio->removed) {
 		retval = amradio_stop(radio);
 		if (retval < 0)
 			amradio_dev_warn(&radio->videodev->dev,
 				"amradio_stop failed\n");
 	}
 
-	mutex_unlock(&radio->disconnect_lock);
 	return 0;
 }
 
@@ -612,12 +601,24 @@ static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
 	.vidioc_s_input     = vidioc_s_input,
 };
 
+static void usb_amradio_device_release(struct video_device *videodev)
+{
+	struct amradio_device *radio = video_get_drvdata(videodev);
+
+	/* we call v4l to free radio->videodev */
+	video_device_release(videodev);
+
+	/* free rest memory */
+	kfree(radio->buffer);
+	kfree(radio);
+}
+
 /* V4L2 interface */
 static struct video_device amradio_videodev_template = {
 	.name		= "AverMedia MR 800 USB FM Radio",
 	.fops		= &usb_amradio_fops,
 	.ioctl_ops 	= &usb_amradio_ioctl_ops,
-	.release	= video_device_release,
+	.release	= usb_amradio_device_release,
 };
 
 /* check if the device is present and register with v4l and
@@ -655,7 +656,6 @@ static int usb_amradio_probe(struct usb_interface *intf,
 	radio->usbdev = interface_to_usbdev(intf);
 	radio->curfreq = 95.16 * FREQ_MUL;
 
-	mutex_init(&radio->disconnect_lock);
 	mutex_init(&radio->lock);
 
 	video_set_drvdata(radio->videodev, radio);
diff --git a/linux/drivers/media/video/em28xx/em28xx-cards.c b/linux/drivers/media/video/em28xx/em28xx-cards.c
index 0c0571d0c..a4ce360b1 100644
--- a/linux/drivers/media/video/em28xx/em28xx-cards.c
+++ b/linux/drivers/media/video/em28xx/em28xx-cards.c
@@ -984,8 +984,30 @@ struct em28xx_board em28xx_boards[] = {
 			.amux     = EM28XX_AMUX_LINE_IN,
 		} },
 	},
+	[EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2] = {
+		.name         = "Pixelview PlayTV Box 4 USB 2.0",
+		.tda9887_conf = TDA9887_PRESENT,
+		.tuner_type   = TUNER_YMEC_TVF_5533MF,
+		.decoder      = EM28XX_SAA711X,
+		.input        = { {
+			.type     = EM28XX_VMUX_TELEVISION,
+			.vmux     = SAA7115_COMPOSITE2,
+			.amux     = EM28XX_AMUX_VIDEO,
+			.aout     = EM28XX_AOUT_MONO | 	/* I2S */
+				    EM28XX_AOUT_MASTER,	/* Line out pin */
+		}, {
+			.type     = EM28XX_VMUX_COMPOSITE1,
+			.vmux     = SAA7115_COMPOSITE0,
+			.amux     = EM28XX_AMUX_LINE_IN,
+		}, {
+			.type     = EM28XX_VMUX_SVIDEO,
+			.vmux     = SAA7115_SVIDEO3,
+			.amux     = EM28XX_AMUX_LINE_IN,
+		} },
+	},
 	[EM2820_BOARD_PROLINK_PLAYTV_USB2] = {
 		.name         = "Pixelview Prolink PlayTV USB 2.0",
+		.has_snapshot_button = 1,
 		.tda9887_conf = TDA9887_PRESENT,
 		.tuner_type   = TUNER_YMEC_TVF_5533MF,
 		.decoder      = EM28XX_SAA711X,
@@ -1419,6 +1441,7 @@ MODULE_DEVICE_TABLE(usb, em28xx_id_table);
 static struct em28xx_hash_table em28xx_eeprom_hash [] = {
 	/* P/N: SA 60002070465 Tuner: TVF7533-MF */
 	{0x6ce05a8f, EM2820_BOARD_PROLINK_PLAYTV_USB2, TUNER_YMEC_TVF_5533MF},
+	{0x72cc5a8b, EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2, TUNER_YMEC_TVF_5533MF},
 	{0x966a0441, EM2880_BOARD_KWORLD_DVB_310U, TUNER_XC2028},
 };
 
diff --git a/linux/drivers/media/video/em28xx/em28xx.h b/linux/drivers/media/video/em28xx/em28xx.h
index a94ec33a2..93c47f260 100644
--- a/linux/drivers/media/video/em28xx/em28xx.h
+++ b/linux/drivers/media/video/em28xx/em28xx.h
@@ -100,6 +100,7 @@
 #define EM2820_BOARD_COMPRO_VIDEOMATE_FORYOU	  58
 #define EM2874_BOARD_PINNACLE_PCTV_80E		  59
 #define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850	  60
+#define EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2	  61
 
 /* Limits minimum and default number of buffers */
 #define EM28XX_MIN_BUF 4