4 files changed, 412 insertions, 191 deletions

diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index b134553eb3b..d4389963b31 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -419,4 +419,16 @@ config RADIO_TEA5764_XTAL
 	  Say Y here if TEA5764 have a 32768 Hz crystal in circuit, say N
 	  here if TEA5764 reference frequency is connected in FREQIN.
 
+config RADIO_TEF6862
+	tristate "TEF6862 Car Radio Enhanced Selectivity Tuner"
+	depends on I2C && VIDEO_V4L2
+	---help---
+	  Say Y here if you want to use the TEF6862 Car Radio Enhanced
+	  Selectivity Tuner, found for instance on the Russellville development
+	  board. On the russellville the device is connected to internal
+	  timberdale I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called TEF6862.
+
 endif # RADIO_ADAPTERS
diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
index 8a63d543ae4..01922ada691 100644
--- a/drivers/media/radio/Makefile
+++ b/drivers/media/radio/Makefile
@@ -23,5 +23,6 @@ obj-$(CONFIG_USB_DSBR) += dsbr100.o
 obj-$(CONFIG_RADIO_SI470X) += si470x/
 obj-$(CONFIG_USB_MR800) += radio-mr800.o
 obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
+obj-$(CONFIG_RADIO_TEF6862) += tef6862.o
 
 EXTRA_CFLAGS += -Isound
diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
index 5f79acb56e4..949f60513d9 100644
--- a/drivers/media/radio/radio-mr800.c
+++ b/drivers/media/radio/radio-mr800.c
@@ -85,6 +85,9 @@ MODULE_LICENSE("GPL");
 #define amradio_dev_warn(dev, fmt, arg...)				\
 		dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
 
+#define amradio_dev_err(dev, fmt, arg...) \
+		dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
+
 /* Probably USB_TIMEOUT should be modified in module parameter */
 #define BUFFER_LENGTH 8
 #define USB_TIMEOUT 500
@@ -129,18 +132,20 @@ static int usb_amradio_resume(struct usb_interface *intf);
 struct amradio_device {
 	/* reference to USB and video device */
 	struct usb_device *usbdev;
-	struct video_device *videodev;
+	struct usb_interface *intf;
+	struct video_device videodev;
 	struct v4l2_device v4l2_dev;
 
 	unsigned char *buffer;
 	struct mutex lock;	/* buffer locking */
 	int curfreq;
 	int stereo;
-	int users;
-	int removed;
 	int muted;
+	int initialized;
 };
 
+#define vdev_to_amradio(r) container_of(r, struct amradio_device, videodev)
+
 /* USB Device ID List */
 static struct usb_device_id usb_amradio_device_table[] = {
 	{USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
@@ -159,7 +164,7 @@ static struct usb_driver usb_amradio_driver = {
 	.resume			= usb_amradio_resume,
 	.reset_resume		= usb_amradio_resume,
 	.id_table		= usb_amradio_device_table,
-	.supports_autosuspend	= 0,
+	.supports_autosuspend	= 1,
 };
 
 /* switch on/off the radio. Send 8 bytes to device */
@@ -168,11 +173,7 @@ static int amradio_set_mute(struct amradio_device *radio, char argument)
 	int retval;
 	int size;
 
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
-
-	mutex_lock(&radio->lock);
+	BUG_ON(!mutex_is_locked(&radio->lock));
 
 	radio->buffer[0] = 0x00;
 	radio->buffer[1] = 0x55;
@@ -187,14 +188,12 @@ static int amradio_set_mute(struct amradio_device *radio, char argument)
 		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
 
 	if (retval < 0 || size != BUFFER_LENGTH) {
-		mutex_unlock(&radio->lock);
+		amradio_dev_warn(&radio->videodev.dev, "set mute failed\n");
 		return retval;
 	}
 
 	radio->muted = argument;
 
-	mutex_unlock(&radio->lock);
-
 	return retval;
 }
 
@@ -205,11 +204,7 @@ static int amradio_setfreq(struct amradio_device *radio, int freq)
 	int size;
 	unsigned short freq_send = 0x10 + (freq >> 3) / 25;
 
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
-
-	mutex_lock(&radio->lock);
+	BUG_ON(!mutex_is_locked(&radio->lock));
 
 	radio->buffer[0] = 0x00;
 	radio->buffer[1] = 0x55;
@@ -223,10 +218,8 @@ static int amradio_setfreq(struct amradio_device *radio, int freq)
 	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
 		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
 
-	if (retval < 0 || size != BUFFER_LENGTH) {
-		mutex_unlock(&radio->lock);
-		return retval;
-	}
+	if (retval < 0 || size != BUFFER_LENGTH)
+		goto out_err;
 
 	/* frequency is calculated from freq_send and placed in first 2 bytes */
 	radio->buffer[0] = (freq_send >> 8) & 0xff;
@@ -240,13 +233,15 @@ static int amradio_setfreq(struct amradio_device *radio, int freq)
 	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
 		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
 
-	if (retval < 0 || size != BUFFER_LENGTH) {
-		mutex_unlock(&radio->lock);
-		return retval;
-	}
+	if (retval < 0 || size != BUFFER_LENGTH)
+		goto out_err;
 
-	mutex_unlock(&radio->lock);
+	radio->curfreq = freq;
+	goto out;
 
+out_err:
+	amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n");
+out:
 	return retval;
 }
 
@@ -255,11 +250,7 @@ static int amradio_set_stereo(struct amradio_device *radio, char argument)
 	int retval;
 	int size;
 
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
-
-	mutex_lock(&radio->lock);
+	BUG_ON(!mutex_is_locked(&radio->lock));
 
 	radio->buffer[0] = 0x00;
 	radio->buffer[1] = 0x55;
@@ -274,14 +265,14 @@ static int amradio_set_stereo(struct amradio_device *radio, char argument)
 		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
 
 	if (retval < 0 || size != BUFFER_LENGTH) {
-		radio->stereo = -1;
-		mutex_unlock(&radio->lock);
+		amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n");
 		return retval;
 	}
 
-	radio->stereo = 1;
-
-	mutex_unlock(&radio->lock);
+	if (argument == WANT_STEREO)
+		radio->stereo = 1;
+	else
+		radio->stereo = 0;
 
 	return retval;
 }
@@ -296,19 +287,19 @@ static void usb_amradio_disconnect(struct usb_interface *intf)
 	struct amradio_device *radio = usb_get_intfdata(intf);
 
 	mutex_lock(&radio->lock);
-	radio->removed = 1;
+	radio->usbdev = NULL;
 	mutex_unlock(&radio->lock);
 
 	usb_set_intfdata(intf, NULL);
-	video_unregister_device(radio->videodev);
 	v4l2_device_disconnect(&radio->v4l2_dev);
+	video_unregister_device(&radio->videodev);
 }
 
 /* vidioc_querycap - query device capabilities */
 static int vidioc_querycap(struct file *file, void *priv,
 					struct v4l2_capability *v)
 {
-	struct amradio_device *radio = video_drvdata(file);
+	struct amradio_device *radio = file->private_data;
 
 	strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
 	strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
@@ -322,13 +313,9 @@ static int vidioc_querycap(struct file *file, void *priv,
 static int vidioc_g_tuner(struct file *file, void *priv,
 				struct v4l2_tuner *v)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
+	struct amradio_device *radio = file->private_data;
 	int retval;
 
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
-
 	if (v->index > 0)
 		return -EINVAL;
 
@@ -341,9 +328,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
  * amradio_set_stereo shouldn't be here
  */
 	retval = amradio_set_stereo(radio, WANT_STEREO);
-	if (retval < 0)
-		amradio_dev_warn(&radio->videodev->dev,
-			"set stereo failed\n");
 
 	strcpy(v->name, "FM");
 	v->type = V4L2_TUNER_RADIO;
@@ -357,19 +341,16 @@ static int vidioc_g_tuner(struct file *file, void *priv,
 		v->audmode = V4L2_TUNER_MODE_MONO;
 	v->signal = 0xffff;     /* Can't get the signal strength, sad.. */
 	v->afc = 0; /* Don't know what is this */
-	return 0;
+
+	return retval;
 }
 
 /* vidioc_s_tuner - set tuner attributes */
 static int vidioc_s_tuner(struct file *file, void *priv,
 				struct v4l2_tuner *v)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-	int retval;
-
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
+	struct amradio_device *radio = file->private_data;
+	int retval = -EINVAL;
 
 	if (v->index > 0)
 		return -EINVAL;
@@ -378,57 +359,33 @@ static int vidioc_s_tuner(struct file *file, void *priv,
 	switch (v->audmode) {
 	case V4L2_TUNER_MODE_MONO:
 		retval = amradio_set_stereo(radio, WANT_MONO);
-		if (retval < 0)
-			amradio_dev_warn(&radio->videodev->dev,
-				"set mono failed\n");
 		break;
 	case V4L2_TUNER_MODE_STEREO:
 		retval = amradio_set_stereo(radio, WANT_STEREO);
-		if (retval < 0)
-			amradio_dev_warn(&radio->videodev->dev,
-				"set stereo failed\n");
 		break;
-	default:
-		return -EINVAL;
 	}
 
-	return 0;
+	return retval;
 }
 
 /* vidioc_s_frequency - set tuner radio frequency */
 static int vidioc_s_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-	int retval;
+	struct amradio_device *radio = file->private_data;
 
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
-
-	mutex_lock(&radio->lock);
-	radio->curfreq = f->frequency;
-	mutex_unlock(&radio->lock);
-
-	retval = amradio_setfreq(radio, radio->curfreq);
-	if (retval < 0)
-		amradio_dev_warn(&radio->videodev->dev,
-			"set frequency failed\n");
-	return 0;
+	return amradio_setfreq(radio, f->frequency);
 }
 
 /* vidioc_g_frequency - get tuner radio frequency */
 static int vidioc_g_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
+	struct amradio_device *radio = file->private_data;
 
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = radio->curfreq;
+
 	return 0;
 }
 
@@ -448,17 +405,14 @@ static int vidioc_queryctrl(struct file *file, void *priv,
 static int vidioc_g_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
+	struct amradio_device *radio = file->private_data;
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		ctrl->value = radio->muted;
 		return 0;
 	}
+
 	return -EINVAL;
 }
 
@@ -466,33 +420,20 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
 static int vidioc_s_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-	int retval;
-
-	/* safety check */
-	if (radio->removed)
-		return -EIO;
+	struct amradio_device *radio = file->private_data;
+	int retval = -EINVAL;
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
-		if (ctrl->value) {
+		if (ctrl->value)
 			retval = amradio_set_mute(radio, AMRADIO_STOP);
-			if (retval < 0) {
-				amradio_dev_warn(&radio->videodev->dev,
-					"amradio_stop failed\n");
-				return -1;
-			}
-		} else {
+		else
 			retval = amradio_set_mute(radio, AMRADIO_START);
-			if (retval < 0) {
-				amradio_dev_warn(&radio->videodev->dev,
-					"amradio_start failed\n");
-				return -1;
-			}
-		}
-		return 0;
+
+		break;
 	}
-	return -EINVAL;
+
+	return retval;
 }
 
 /* vidioc_g_audio - get audio attributes */
@@ -531,75 +472,108 @@ static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 	return 0;
 }
 
-/* open device - amradio_start() and amradio_setfreq() */
-static int usb_amradio_open(struct file *file)
+static int usb_amradio_init(struct amradio_device *radio)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
 	int retval;
 
-	lock_kernel();
+	retval = amradio_set_mute(radio, AMRADIO_STOP);
+	if (retval)
+		goto out_err;
 
-	radio->users = 1;
-	radio->muted = 1;
+	retval = amradio_set_stereo(radio, WANT_STEREO);
+	if (retval)
+		goto out_err;
 
-	retval = amradio_set_mute(radio, AMRADIO_START);
-	if (retval < 0) {
-		amradio_dev_warn(&radio->videodev->dev,
-			"radio did not start up properly\n");
-		radio->users = 0;
-		unlock_kernel();
-		return -EIO;
+	radio->initialized = 1;
+	goto out;
+
+out_err:
+	amradio_dev_err(&radio->videodev.dev, "initialization failed\n");
+out:
+	return retval;
+}
+
+/* open device - amradio_start() and amradio_setfreq() */
+static int usb_amradio_open(struct file *file)
+{
+	struct amradio_device *radio = vdev_to_amradio(video_devdata(file));
+	int retval = 0;
+
+	mutex_lock(&radio->lock);
+
+	if (!radio->usbdev) {
+		retval = -EIO;
+		goto unlock;
 	}
 
-	retval = amradio_set_stereo(radio, WANT_STEREO);
-	if (retval < 0)
-		amradio_dev_warn(&radio->videodev->dev,
-			"set stereo failed\n");
+	file->private_data = radio;
+	retval = usb_autopm_get_interface(radio->intf);
+	if (retval)
+		goto unlock;
 
-	retval = amradio_setfreq(radio, radio->curfreq);
-	if (retval < 0)
-		amradio_dev_warn(&radio->videodev->dev,
-			"set frequency failed\n");
+	if (unlikely(!radio->initialized)) {
+		retval = usb_amradio_init(radio);
+		if (retval)
+			usb_autopm_put_interface(radio->intf);
+	}
 
-	unlock_kernel();
-	return 0;
+unlock:
+	mutex_unlock(&radio->lock);
+	return retval;
 }
 
 /*close device */
 static int usb_amradio_close(struct file *file)
 {
-	struct amradio_device *radio = video_get_drvdata(video_devdata(file));
-	int retval;
-
-	if (!radio)
-		return -ENODEV;
+	struct amradio_device *radio = file->private_data;
+	int retval = 0;
 
 	mutex_lock(&radio->lock);
-	radio->users = 0;
+
+	if (!radio->usbdev)
+		retval = -EIO;
+	else
+		usb_autopm_put_interface(radio->intf);
+
 	mutex_unlock(&radio->lock);
+	return retval;
+}
 
-	if (!radio->removed) {
-		retval = amradio_set_mute(radio, AMRADIO_STOP);
-		if (retval < 0)
-			amradio_dev_warn(&radio->videodev->dev,
-				"amradio_stop failed\n");
+static long usb_amradio_ioctl(struct file *file, unsigned int cmd,
+				unsigned long arg)
+{
+	struct amradio_device *radio = file->private_data;
+	long retval = 0;
+
+	mutex_lock(&radio->lock);
+
+	if (!radio->usbdev) {
+		retval = -EIO;
+		goto unlock;
 	}
 
-	return 0;
+	retval = video_ioctl2(file, cmd, arg);
+
+unlock:
+	mutex_unlock(&radio->lock);
+	return retval;
 }
 
 /* Suspend device - stop device. Need to be checked and fixed */
 static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct amradio_device *radio = usb_get_intfdata(intf);
-	int retval;
 
-	retval = amradio_set_mute(radio, AMRADIO_STOP);
-	if (retval < 0)
-		dev_warn(&intf->dev, "amradio_stop failed\n");
+	mutex_lock(&radio->lock);
+
+	if (!radio->muted && radio->initialized) {
+		amradio_set_mute(radio, AMRADIO_STOP);
+		radio->muted = 0;
+	}
 
 	dev_info(&intf->dev, "going into suspend..\n");
 
+	mutex_unlock(&radio->lock);
 	return 0;
 }
 
@@ -607,14 +581,26 @@ static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
 static int usb_amradio_resume(struct usb_interface *intf)
 {
 	struct amradio_device *radio = usb_get_intfdata(intf);
-	int retval;
 
-	retval = amradio_set_mute(radio, AMRADIO_START);
-	if (retval < 0)
-		dev_warn(&intf->dev, "amradio_start failed\n");
+	mutex_lock(&radio->lock);
+
+	if (unlikely(!radio->initialized))
+		goto unlock;
+
+	if (radio->stereo)
+		amradio_set_stereo(radio, WANT_STEREO);
+	else
+		amradio_set_stereo(radio, WANT_MONO);
+
+	amradio_setfreq(radio, radio->curfreq);
 
+	if (!radio->muted)
+		amradio_set_mute(radio, AMRADIO_START);
+
+unlock:
 	dev_info(&intf->dev, "coming out of suspend..\n");
 
+	mutex_unlock(&radio->lock);
 	return 0;
 }
 
@@ -623,7 +609,7 @@ static const struct v4l2_file_operations usb_amradio_fops = {
 	.owner		= THIS_MODULE,
 	.open		= usb_amradio_open,
 	.release	= usb_amradio_close,
-	.ioctl		= video_ioctl2,
+	.ioctl		= usb_amradio_ioctl,
 };
 
 static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
@@ -643,10 +629,7 @@ static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
 
 static void usb_amradio_video_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);
+	struct amradio_device *radio = vdev_to_amradio(videodev);
 
 	v4l2_device_unregister(&radio->v4l2_dev);
 
@@ -660,70 +643,63 @@ static int usb_amradio_probe(struct usb_interface *intf,
 				const struct usb_device_id *id)
 {
 	struct amradio_device *radio;
-	struct v4l2_device *v4l2_dev;
-	int retval;
+	int retval = 0;
 
 	radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
 
 	if (!radio) {
 		dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err;
 	}
 
 	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
 
 	if (!radio->buffer) {
 		dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
-		kfree(radio);
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err_nobuf;
 	}
 
-	v4l2_dev = &radio->v4l2_dev;
-	retval = v4l2_device_register(&intf->dev, v4l2_dev);
+	retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
 	if (retval < 0) {
 		dev_err(&intf->dev, "couldn't register v4l2_device\n");
-		kfree(radio->buffer);
-		kfree(radio);
-		return retval;
+		goto err_v4l2;
 	}
 
-	radio->videodev = video_device_alloc();
-
-	if (!radio->videodev) {
-		dev_err(&intf->dev, "video_device_alloc failed\n");
-		kfree(radio->buffer);
-		kfree(radio);
-		return -ENOMEM;
-	}
+	strlcpy(radio->videodev.name, radio->v4l2_dev.name,
+		sizeof(radio->videodev.name));
+	radio->videodev.v4l2_dev = &radio->v4l2_dev;
+	radio->videodev.fops = &usb_amradio_fops;
+	radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops;
+	radio->videodev.release = usb_amradio_video_device_release;
 
-	strlcpy(radio->videodev->name, v4l2_dev->name, sizeof(radio->videodev->name));
-	radio->videodev->v4l2_dev = v4l2_dev;
-	radio->videodev->fops = &usb_amradio_fops;
-	radio->videodev->ioctl_ops = &usb_amradio_ioctl_ops;
-	radio->videodev->release = usb_amradio_video_device_release;
-
-	radio->removed = 0;
-	radio->users = 0;
 	radio->usbdev = interface_to_usbdev(intf);
+	radio->intf = intf;
 	radio->curfreq = 95.16 * FREQ_MUL;
-	radio->stereo = -1;
 
 	mutex_init(&radio->lock);
 
-	video_set_drvdata(radio->videodev, radio);
+	video_set_drvdata(&radio->videodev, radio);
 
-	retval = video_register_device(radio->videodev,	VFL_TYPE_RADIO,	radio_nr);
+	retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
+					radio_nr);
 	if (retval < 0) {
 		dev_err(&intf->dev, "could not register video device\n");
-		video_device_release(radio->videodev);
-		v4l2_device_unregister(v4l2_dev);
-		kfree(radio->buffer);
-		kfree(radio);
-		return -EIO;
+		goto err_vdev;
 	}
 
 	usb_set_intfdata(intf, radio);
 	return 0;
+
+err_vdev:
+	v4l2_device_unregister(&radio->v4l2_dev);
+err_v4l2:
+	kfree(radio->buffer);
+err_nobuf:
+	kfree(radio);
+err:
+	return retval;
 }
 
 static int __init amradio_init(void)
diff --git a/drivers/media/radio/tef6862.c b/drivers/media/radio/tef6862.c
new file mode 100644
index 00000000000..6e607ff0c16
--- /dev/null
+++ b/drivers/media/radio/tef6862.c
@@ -0,0 +1,232 @@
+/*
+ * tef6862.c Philips TEF6862 Car Radio Enhanced Selectivity Tuner
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+#define DRIVER_NAME "tef6862"
+
+#define FREQ_MUL 16000
+
+#define TEF6862_LO_FREQ (875 * FREQ_MUL / 10)
+#define TEF6862_HI_FREQ (108 * FREQ_MUL)
+
+/* Write mode sub addresses */
+#define WM_SUB_BANDWIDTH	0x0
+#define WM_SUB_PLLM		0x1
+#define WM_SUB_PLLL		0x2
+#define WM_SUB_DAA		0x3
+#define WM_SUB_AGC		0x4
+#define WM_SUB_BAND		0x5
+#define WM_SUB_CONTROL		0x6
+#define WM_SUB_LEVEL		0x7
+#define WM_SUB_IFCF		0x8
+#define WM_SUB_IFCAP		0x9
+#define WM_SUB_ACD		0xA
+#define WM_SUB_TEST		0xF
+
+/* Different modes of the MSA register */
+#define MODE_BUFFER		0x0
+#define MODE_PRESET		0x1
+#define MODE_SEARCH		0x2
+#define MODE_AF_UPDATE		0x3
+#define MODE_JUMP		0x4
+#define MODE_CHECK		0x5
+#define MODE_LOAD		0x6
+#define MODE_END		0x7
+#define MODE_SHIFT		5
+
+struct tef6862_state {
+	struct v4l2_subdev sd;
+	unsigned long freq;
+};
+
+static inline struct tef6862_state *to_state(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct tef6862_state, sd);
+}
+
+static u16 tef6862_sigstr(struct i2c_client *client)
+{
+	u8 buf[4];
+	int err = i2c_master_recv(client, buf, sizeof(buf));
+	if (err == sizeof(buf))
+		return buf[3] << 8;
+	return 0;
+}
+
+static int tef6862_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
+{
+	if (v->index > 0)
+		return -EINVAL;
+
+	/* only support FM for now */
+	strlcpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	v->rangelow = TEF6862_LO_FREQ;
+	v->rangehigh = TEF6862_HI_FREQ;
+	v->rxsubchans = V4L2_TUNER_SUB_MONO;
+	v->capability = V4L2_TUNER_CAP_LOW;
+	v->audmode = V4L2_TUNER_MODE_STEREO;
+	v->signal = tef6862_sigstr(v4l2_get_subdevdata(sd));
+
+	return 0;
+}
+
+static int tef6862_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
+{
+	return v->index ? -EINVAL : 0;
+}
+
+static int tef6862_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+	struct tef6862_state *state = to_state(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+	u16 pll;
+	u8 i2cmsg[3];
+	int err;
+
+	if (f->tuner != 0)
+		return -EINVAL;
+
+	pll = 1964 + ((f->frequency - TEF6862_LO_FREQ) * 20) / FREQ_MUL;
+	i2cmsg[0] = (MODE_PRESET << MODE_SHIFT) | WM_SUB_PLLM;
+	i2cmsg[1] = (pll >> 8) & 0xff;
+	i2cmsg[2] = pll & 0xff;
+
+	err = i2c_master_send(client, i2cmsg, sizeof(i2cmsg));
+	if (!err)
+		state->freq = f->frequency;
+	return err;
+}
+
+static int tef6862_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+	struct tef6862_state *state = to_state(sd);
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = state->freq;
+	return 0;
+}
+
+static int tef6862_g_chip_ident(struct v4l2_subdev *sd,
+	struct v4l2_dbg_chip_ident *chip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TEF6862, 0);
+}
+
+static const struct v4l2_subdev_tuner_ops tef6862_tuner_ops = {
+	.g_tuner = tef6862_g_tuner,
+	.s_tuner = tef6862_s_tuner,
+	.s_frequency = tef6862_s_frequency,
+	.g_frequency = tef6862_g_frequency,
+};
+
+static const struct v4l2_subdev_core_ops tef6862_core_ops = {
+	.g_chip_ident = tef6862_g_chip_ident,
+};
+
+static const struct v4l2_subdev_ops tef6862_ops = {
+	.core = &tef6862_core_ops,
+	.tuner = &tef6862_tuner_ops,
+};
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int __devinit tef6862_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct tef6862_state *state;
+	struct v4l2_subdev *sd;
+
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EIO;
+
+	v4l_info(client, "chip found @ 0x%02x (%s)\n",
+			client->addr << 1, client->adapter->name);
+
+	state = kmalloc(sizeof(struct tef6862_state), GFP_KERNEL);
+	if (state == NULL)
+		return -ENOMEM;
+	state->freq = TEF6862_LO_FREQ;
+
+	sd = &state->sd;
+	v4l2_i2c_subdev_init(sd, client, &tef6862_ops);
+
+	return 0;
+}
+
+static int __devexit tef6862_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	v4l2_device_unregister_subdev(sd);
+	kfree(to_state(sd));
+	return 0;
+}
+
+static const struct i2c_device_id tef6862_id[] = {
+	{DRIVER_NAME, 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, tef6862_id);
+
+static struct i2c_driver tef6862_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= DRIVER_NAME,
+	},
+	.probe		= tef6862_probe,
+	.remove		= tef6862_remove,
+	.id_table	= tef6862_id,
+};
+
+static __init int tef6862_init(void)
+{
+	return i2c_add_driver(&tef6862_driver);
+}
+
+static __exit void tef6862_exit(void)
+{
+	i2c_del_driver(&tef6862_driver);
+}
+
+module_init(tef6862_init);
+module_exit(tef6862_exit);
+
+MODULE_DESCRIPTION("TEF6862 Car Radio Enhanced Selectivity Tuner");
+MODULE_AUTHOR("Mocean Laboratories");
+MODULE_LICENSE("GPL v2");
+