drivers/media/video/sh_mobile_csi2.c - kernel/msm-4.9 - Gitiles

 /*
  * Driver for the SH-Mobile MIPI CSI-2 unit
  *
  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
  *
  * 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.
  */

 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>

 #include <media/sh_mobile_csi2.h>
 #include <media/soc_camera.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-dev.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-mediabus.h>
 #include <media/v4l2-subdev.h>

 #define SH_CSI2_TREF	0x00
 #define SH_CSI2_SRST	0x04
 #define SH_CSI2_PHYCNT	0x08
 #define SH_CSI2_CHKSUM	0x0C
 #define SH_CSI2_VCDT	0x10

 struct sh_csi2 {
 	struct v4l2_subdev		subdev;
 	struct list_head		list;
 	struct notifier_block		notifier;
 	unsigned int			irq;
 	void __iomem			*base;
 	struct platform_device		*pdev;
 	struct sh_csi2_client_config	*client;
 };

 static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
 			   struct v4l2_mbus_framefmt *mf)
 {
 	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
 	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;

 	if (mf->width > 8188)
 		mf->width = 8188;
 	else if (mf->width & 1)
 		mf->width &= ~1;

 	switch (pdata->type) {
 	case SH_CSI2C:
 		switch (mf->code) {
 		case V4L2_MBUS_FMT_UYVY8_2X8:		/* YUV422 */
 		case V4L2_MBUS_FMT_YUYV8_1_5X8:		/* YUV420 */
 		case V4L2_MBUS_FMT_GREY8_1X8:		/* RAW8 */
 		case V4L2_MBUS_FMT_SBGGR8_1X8:
 		case V4L2_MBUS_FMT_SGRBG8_1X8:
 			break;
 		default:
 			/* All MIPI CSI-2 devices must support one of primary formats */
 			mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
 		}
 		break;
 	case SH_CSI2I:
 		switch (mf->code) {
 		case V4L2_MBUS_FMT_GREY8_1X8:		/* RAW8 */
 		case V4L2_MBUS_FMT_SBGGR8_1X8:
 		case V4L2_MBUS_FMT_SGRBG8_1X8:
 		case V4L2_MBUS_FMT_SBGGR10_1X10:	/* RAW10 */
 		case V4L2_MBUS_FMT_SBGGR12_1X12:	/* RAW12 */
 			break;
 		default:
 			/* All MIPI CSI-2 devices must support one of primary formats */
 			mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
 		}
 		break;
 	}

 	return 0;
 }

 /*
  * We have done our best in try_fmt to try and tell the sensor, which formats
  * we support. If now the configuration is unsuitable for us we can only
  * error out.
  */
 static int sh_csi2_s_fmt(struct v4l2_subdev *sd,
 			 struct v4l2_mbus_framefmt *mf)
 {
 	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
 	u32 tmp = (priv->client->channel & 3) << 8;

 	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
 	if (mf->width > 8188 || mf->width & 1)
 		return -EINVAL;

 	switch (mf->code) {
 	case V4L2_MBUS_FMT_UYVY8_2X8:
 		tmp |= 0x1e;	/* YUV422 8 bit */
 		break;
 	case V4L2_MBUS_FMT_YUYV8_1_5X8:
 		tmp |= 0x18;	/* YUV420 8 bit */
 		break;
 	case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
 		tmp |= 0x21;	/* RGB555 */
 		break;
 	case V4L2_MBUS_FMT_RGB565_2X8_BE:
 		tmp |= 0x22;	/* RGB565 */
 		break;
 	case V4L2_MBUS_FMT_GREY8_1X8:
 	case V4L2_MBUS_FMT_SBGGR8_1X8:
 	case V4L2_MBUS_FMT_SGRBG8_1X8:
 		tmp |= 0x2a;	/* RAW8 */
 		break;
 	default:
 		return -EINVAL;
 	}

 	iowrite32(tmp, priv->base + SH_CSI2_VCDT);

 	return 0;
 }

 static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
 	.s_mbus_fmt	= sh_csi2_s_fmt,
 	.try_mbus_fmt	= sh_csi2_try_fmt,
 };

 static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops;

 static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
 	.core	= &sh_csi2_subdev_core_ops,
 	.video	= &sh_csi2_subdev_video_ops,
 };

 static void sh_csi2_hwinit(struct sh_csi2 *priv)
 {
 	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
 	__u32 tmp = 0x10; /* Enable MIPI CSI clock lane */

 	/* Reflect registers immediately */
 	iowrite32(0x00000001, priv->base + SH_CSI2_TREF);
 	/* reset CSI2 harware */
 	iowrite32(0x00000001, priv->base + SH_CSI2_SRST);
 	udelay(5);
 	iowrite32(0x00000000, priv->base + SH_CSI2_SRST);

 	if (priv->client->lanes & 3)
 		tmp |= priv->client->lanes & 3;
 	else
 		/* Default - both lanes */
 		tmp |= 3;

 	if (priv->client->phy == SH_CSI2_PHY_MAIN)
 		tmp |= 0x8000;

 	iowrite32(tmp, priv->base + SH_CSI2_PHYCNT);

 	tmp = 0;
 	if (pdata->flags & SH_CSI2_ECC)
 		tmp |= 2;
 	if (pdata->flags & SH_CSI2_CRC)
 		tmp |= 1;
 	iowrite32(tmp, priv->base + SH_CSI2_CHKSUM);
 }

 static int sh_csi2_set_bus_param(struct soc_camera_device *icd,
 				 unsigned long flags)
 {
 	return 0;
 }

 static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd)
 {
 	struct soc_camera_link *icl = to_soc_camera_link(icd);
 	const unsigned long flags = SOCAM_PCLK_SAMPLE_RISING |
 		SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
 		SOCAM_MASTER | SOCAM_DATAWIDTH_8 | SOCAM_DATA_ACTIVE_HIGH;

 	return soc_camera_apply_sensor_flags(icl, flags);
 }

 static int sh_csi2_notify(struct notifier_block *nb,
 			  unsigned long action, void *data)
 {
 	struct device *dev = data;
 	struct soc_camera_device *icd = to_soc_camera_dev(dev);
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent);
 	struct sh_csi2 *priv =
 		container_of(nb, struct sh_csi2, notifier);
 	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
 	int ret, i;

 	for (i = 0; i < pdata->num_clients; i++)
 		if (&pdata->clients[i].pdev->dev == icd->pdev)
 			break;

 	dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i);

 	if (i == pdata->num_clients)
 		return NOTIFY_DONE;

 	switch (action) {
 	case BUS_NOTIFY_BOUND_DRIVER:
 		snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s",
 			 dev_name(v4l2_dev->dev), ".mipi-csi");
 		ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev);
 		dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
 		if (ret < 0)
 			return NOTIFY_DONE;

 		priv->client = pdata->clients + i;

 		icd->ops->set_bus_param		= sh_csi2_set_bus_param;
 		icd->ops->query_bus_param	= sh_csi2_query_bus_param;

 		pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev));

 		sh_csi2_hwinit(priv);
 		break;
 	case BUS_NOTIFY_UNBIND_DRIVER:
 		priv->client = NULL;

 		/* Driver is about to be unbound */
 		icd->ops->set_bus_param		= NULL;
 		icd->ops->query_bus_param	= NULL;

 		v4l2_device_unregister_subdev(&priv->subdev);

 		pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
 		break;
 	}

 	return NOTIFY_OK;
 }

 static __devinit int sh_csi2_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	unsigned int irq;
 	int ret;
 	struct sh_csi2 *priv;
 	/* Platform data specify the PHY, lanes, ECC, CRC */
 	struct sh_csi2_pdata *pdata = pdev->dev.platform_data;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	/* Interrupt unused so far */
 	irq = platform_get_irq(pdev, 0);

 	if (!res || (int)irq <= 0 || !pdata) {
 		dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n");
 		return -ENODEV;
 	}

 	/* TODO: Add support for CSI2I. Careful: different register layout! */
 	if (pdata->type != SH_CSI2C) {
 		dev_err(&pdev->dev, "Only CSI2C supported ATM.\n");
 		return -EINVAL;
 	}

 	priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	priv->irq = irq;
 	priv->notifier.notifier_call = sh_csi2_notify;

 	/* We MUST attach after the MIPI sensor */
 	ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "CSI2 cannot register notifier\n");
 		goto ernotify;
 	}

 	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
 		dev_err(&pdev->dev, "CSI2 register region already claimed\n");
 		ret = -EBUSY;
 		goto ereqreg;
 	}

 	priv->base = ioremap(res->start, resource_size(res));
 	if (!priv->base) {
 		ret = -ENXIO;
 		dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
 		goto eremap;
 	}

 	priv->pdev = pdev;

 	v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
 	v4l2_set_subdevdata(&priv->subdev, &pdev->dev);

 	platform_set_drvdata(pdev, priv);

 	pm_runtime_enable(&pdev->dev);

 	dev_dbg(&pdev->dev, "CSI2 probed.\n");

 	return 0;

 eremap:
 	release_mem_region(res->start, resource_size(res));
 ereqreg:
 	bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
 ernotify:
 	kfree(priv);

 	return ret;
 }

 static __devexit int sh_csi2_remove(struct platform_device *pdev)
 {
 	struct sh_csi2 *priv = platform_get_drvdata(pdev);
 	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

 	bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
 	pm_runtime_disable(&pdev->dev);
 	iounmap(priv->base);
 	release_mem_region(res->start, resource_size(res));
 	platform_set_drvdata(pdev, NULL);
 	kfree(priv);

 	return 0;
 }

 static struct platform_driver __refdata sh_csi2_pdrv = {
 	.remove  = __devexit_p(sh_csi2_remove),
 	.driver  = {
 		.name	= "sh-mobile-csi2",
 		.owner	= THIS_MODULE,
 	},
 };

 static int __init sh_csi2_init(void)
 {
 	return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe);
 }

 static void __exit sh_csi2_exit(void)
 {
 	platform_driver_unregister(&sh_csi2_pdrv);
 }

 module_init(sh_csi2_init);
 module_exit(sh_csi2_exit);

 MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver");
 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:sh-mobile-csi2");
	/*
	* Driver for the SH-Mobile MIPI CSI-2 unit
	*
	* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
	*
	* 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.
	*/

	#include <linux/delay.h>
	#include <linux/i2c.h>
	#include <linux/io.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/slab.h>
	#include <linux/videodev2.h>

	#include <media/sh_mobile_csi2.h>
	#include <media/soc_camera.h>
	#include <media/v4l2-common.h>
	#include <media/v4l2-dev.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-mediabus.h>
	#include <media/v4l2-subdev.h>

	#define SH_CSI2_TREF 0x00
	#define SH_CSI2_SRST 0x04
	#define SH_CSI2_PHYCNT 0x08
	#define SH_CSI2_CHKSUM 0x0C
	#define SH_CSI2_VCDT 0x10

	struct sh_csi2 {
	struct v4l2_subdev subdev;
	struct list_head list;
	struct notifier_block notifier;
	unsigned int irq;
	void __iomem *base;
	struct platform_device *pdev;
	struct sh_csi2_client_config *client;
	};

	static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)
	{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;

	if (mf->width > 8188)
	mf->width = 8188;
	else if (mf->width & 1)
	mf->width &= ~1;

	switch (pdata->type) {
	case SH_CSI2C:
	switch (mf->code) {
	case V4L2_MBUS_FMT_UYVY8_2X8: /* YUV422 */
	case V4L2_MBUS_FMT_YUYV8_1_5X8: /* YUV420 */
	case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */
	case V4L2_MBUS_FMT_SBGGR8_1X8:
	case V4L2_MBUS_FMT_SGRBG8_1X8:
	break;
	default:
	/* All MIPI CSI-2 devices must support one of primary formats */
	mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
	}
	break;
	case SH_CSI2I:
	switch (mf->code) {
	case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */
	case V4L2_MBUS_FMT_SBGGR8_1X8:
	case V4L2_MBUS_FMT_SGRBG8_1X8:
	case V4L2_MBUS_FMT_SBGGR10_1X10: /* RAW10 */
	case V4L2_MBUS_FMT_SBGGR12_1X12: /* RAW12 */
	break;
	default:
	/* All MIPI CSI-2 devices must support one of primary formats */
	mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
	}
	break;
	}

	return 0;
	}

	/*
	* We have done our best in try_fmt to try and tell the sensor, which formats
	* we support. If now the configuration is unsuitable for us we can only
	* error out.
	*/
	static int sh_csi2_s_fmt(struct v4l2_subdev *sd,
	struct v4l2_mbus_framefmt *mf)
	{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
	u32 tmp = (priv->client->channel & 3) << 8;

	dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
	if (mf->width > 8188 \|\| mf->width & 1)
	return -EINVAL;

	switch (mf->code) {
	case V4L2_MBUS_FMT_UYVY8_2X8:
	tmp \|= 0x1e; /* YUV422 8 bit */
	break;
	case V4L2_MBUS_FMT_YUYV8_1_5X8:
	tmp \|= 0x18; /* YUV420 8 bit */
	break;
	case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
	tmp \|= 0x21; /* RGB555 */
	break;
	case V4L2_MBUS_FMT_RGB565_2X8_BE:
	tmp \|= 0x22; /* RGB565 */
	break;
	case V4L2_MBUS_FMT_GREY8_1X8:
	case V4L2_MBUS_FMT_SBGGR8_1X8:
	case V4L2_MBUS_FMT_SGRBG8_1X8:
	tmp \|= 0x2a; /* RAW8 */
	break;
	default:
	return -EINVAL;
	}

	iowrite32(tmp, priv->base + SH_CSI2_VCDT);

	return 0;
	}

	static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
	.s_mbus_fmt = sh_csi2_s_fmt,
	.try_mbus_fmt = sh_csi2_try_fmt,
	};

	static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops;

	static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
	.core = &sh_csi2_subdev_core_ops,
	.video = &sh_csi2_subdev_video_ops,
	};

	static void sh_csi2_hwinit(struct sh_csi2 *priv)
	{
	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
	__u32 tmp = 0x10; /* Enable MIPI CSI clock lane */

	/* Reflect registers immediately */
	iowrite32(0x00000001, priv->base + SH_CSI2_TREF);
	/* reset CSI2 harware */
	iowrite32(0x00000001, priv->base + SH_CSI2_SRST);
	udelay(5);
	iowrite32(0x00000000, priv->base + SH_CSI2_SRST);

	if (priv->client->lanes & 3)
	tmp \|= priv->client->lanes & 3;
	else
	/* Default - both lanes */
	tmp \|= 3;

	if (priv->client->phy == SH_CSI2_PHY_MAIN)
	tmp \|= 0x8000;

	iowrite32(tmp, priv->base + SH_CSI2_PHYCNT);

	tmp = 0;
	if (pdata->flags & SH_CSI2_ECC)
	tmp \|= 2;
	if (pdata->flags & SH_CSI2_CRC)
	tmp \|= 1;
	iowrite32(tmp, priv->base + SH_CSI2_CHKSUM);
	}

	static int sh_csi2_set_bus_param(struct soc_camera_device *icd,
	unsigned long flags)
	{
	return 0;
	}

	static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd)
	{
	struct soc_camera_link *icl = to_soc_camera_link(icd);
	const unsigned long flags = SOCAM_PCLK_SAMPLE_RISING \|
	SOCAM_HSYNC_ACTIVE_HIGH \| SOCAM_VSYNC_ACTIVE_HIGH \|
	SOCAM_MASTER \| SOCAM_DATAWIDTH_8 \| SOCAM_DATA_ACTIVE_HIGH;

	return soc_camera_apply_sensor_flags(icl, flags);
	}

	static int sh_csi2_notify(struct notifier_block *nb,
	unsigned long action, void *data)
	{
	struct device *dev = data;
	struct soc_camera_device *icd = to_soc_camera_dev(dev);
	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent);
	struct sh_csi2 *priv =
	container_of(nb, struct sh_csi2, notifier);
	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
	int ret, i;

	for (i = 0; i < pdata->num_clients; i++)
	if (&pdata->clients[i].pdev->dev == icd->pdev)
	break;

	dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i);

	if (i == pdata->num_clients)
	return NOTIFY_DONE;

	switch (action) {
	case BUS_NOTIFY_BOUND_DRIVER:
	snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s",
	dev_name(v4l2_dev->dev), ".mipi-csi");
	ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev);
	dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
	if (ret < 0)
	return NOTIFY_DONE;

	priv->client = pdata->clients + i;

	icd->ops->set_bus_param = sh_csi2_set_bus_param;
	icd->ops->query_bus_param = sh_csi2_query_bus_param;

	pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev));

	sh_csi2_hwinit(priv);
	break;
	case BUS_NOTIFY_UNBIND_DRIVER:
	priv->client = NULL;

	/* Driver is about to be unbound */
	icd->ops->set_bus_param = NULL;
	icd->ops->query_bus_param = NULL;

	v4l2_device_unregister_subdev(&priv->subdev);

	pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
	break;
	}

	return NOTIFY_OK;
	}

	static __devinit int sh_csi2_probe(struct platform_device *pdev)
	{
	struct resource *res;
	unsigned int irq;
	int ret;
	struct sh_csi2 *priv;
	/* Platform data specify the PHY, lanes, ECC, CRC */
	struct sh_csi2_pdata *pdata = pdev->dev.platform_data;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	/* Interrupt unused so far */
	irq = platform_get_irq(pdev, 0);

	if (!res \|\| (int)irq <= 0 \|\| !pdata) {
	dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n");
	return -ENODEV;
	}

	/* TODO: Add support for CSI2I. Careful: different register layout! */
	if (pdata->type != SH_CSI2C) {
	dev_err(&pdev->dev, "Only CSI2C supported ATM.\n");
	return -EINVAL;
	}

	priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	priv->irq = irq;
	priv->notifier.notifier_call = sh_csi2_notify;

	/* We MUST attach after the MIPI sensor */
	ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier);
	if (ret < 0) {
	dev_err(&pdev->dev, "CSI2 cannot register notifier\n");
	goto ernotify;
	}

	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
	dev_err(&pdev->dev, "CSI2 register region already claimed\n");
	ret = -EBUSY;
	goto ereqreg;
	}

	priv->base = ioremap(res->start, resource_size(res));
	if (!priv->base) {
	ret = -ENXIO;
	dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
	goto eremap;
	}

	priv->pdev = pdev;

	v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
	v4l2_set_subdevdata(&priv->subdev, &pdev->dev);

	platform_set_drvdata(pdev, priv);

	pm_runtime_enable(&pdev->dev);

	dev_dbg(&pdev->dev, "CSI2 probed.\n");

	return 0;

	eremap:
	release_mem_region(res->start, resource_size(res));
	ereqreg:
	bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
	ernotify:
	kfree(priv);

	return ret;
	}

	static __devexit int sh_csi2_remove(struct platform_device *pdev)
	{
	struct sh_csi2 *priv = platform_get_drvdata(pdev);
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
	pm_runtime_disable(&pdev->dev);
	iounmap(priv->base);
	release_mem_region(res->start, resource_size(res));
	platform_set_drvdata(pdev, NULL);
	kfree(priv);

	return 0;
	}

	static struct platform_driver __refdata sh_csi2_pdrv = {
	.remove = __devexit_p(sh_csi2_remove),
	.driver = {
	.name = "sh-mobile-csi2",
	.owner = THIS_MODULE,
	},
	};

	static int __init sh_csi2_init(void)
	{
	return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe);
	}

	static void __exit sh_csi2_exit(void)
	{
	platform_driver_unregister(&sh_csi2_pdrv);
	}

	module_init(sh_csi2_init);
	module_exit(sh_csi2_exit);

	MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver");
	MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("platform:sh-mobile-csi2");