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Commit f304562e authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[media] soc-camera/sh_mobile_csi2: remove unused driver



The sh_mobile_csi2 isn't used anymore (was it ever?), so remove it.
Especially since the soc-camera framework is being deprecated.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 563bf7a7
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+0 −7
Original line number Diff line number Diff line
@@ -35,13 +35,6 @@ config VIDEO_RCAR_VIN_OLD
	---help---
	  This is a v4l2 driver for the R-Car VIN Interface

config VIDEO_SH_MOBILE_CSI2
	tristate "SuperH Mobile MIPI CSI-2 Interface driver"
	depends on VIDEO_DEV && SOC_CAMERA && HAVE_CLK
	depends on ARCH_SHMOBILE || SUPERH || COMPILE_TEST
	---help---
	  This is a v4l2 driver for the SuperH MIPI CSI-2 Interface

config VIDEO_SH_MOBILE_CEU
	tristate "SuperH Mobile CEU Interface driver"
	depends on VIDEO_DEV && SOC_CAMERA && HAS_DMA && HAVE_CLK
+0 −1
Original line number Diff line number Diff line
@@ -9,5 +9,4 @@ obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o
obj-$(CONFIG_VIDEO_ATMEL_ISI)		+= atmel-isi.o
obj-$(CONFIG_VIDEO_PXA27x)		+= pxa_camera.o
obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)	+= sh_mobile_ceu_camera.o
obj-$(CONFIG_VIDEO_SH_MOBILE_CSI2)	+= sh_mobile_csi2.o
obj-$(CONFIG_VIDEO_RCAR_VIN_OLD)	+= rcar_vin.o
+10 −219
Original line number Diff line number Diff line
@@ -41,7 +41,6 @@
#include <media/v4l2-dev.h>
#include <media/soc_camera.h>
#include <media/drv-intf/sh_mobile_ceu.h>
#include <media/drv-intf/sh_mobile_csi2.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-mediabus.h>
#include <media/drv-intf/soc_mediabus.h>
@@ -99,11 +98,6 @@ struct sh_mobile_ceu_buffer {

struct sh_mobile_ceu_dev {
	struct soc_camera_host ici;
	/* Asynchronous CSI2 linking */
	struct v4l2_async_subdev *csi2_asd;
	struct v4l2_subdev *csi2_sd;
	/* Synchronous probing compatibility */
	struct platform_device *csi2_pdev;

	unsigned int irq;
	void __iomem *base;
@@ -517,74 +511,20 @@ static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
	return IRQ_HANDLED;
}

static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
{
	struct v4l2_subdev *sd;

	if (pcdev->csi2_sd)
		return pcdev->csi2_sd;

	if (pcdev->csi2_asd) {
		char name[] = "sh-mobile-csi2";
		v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
			if (!strncmp(name, sd->name, sizeof(name) - 1)) {
				pcdev->csi2_sd = sd;
				return sd;
			}
	}

	return NULL;
}

static struct v4l2_subdev *csi2_subdev(struct sh_mobile_ceu_dev *pcdev,
				       struct soc_camera_device *icd)
{
	struct v4l2_subdev *sd = pcdev->csi2_sd;

	return sd && sd->grp_id == soc_camera_grp_id(icd) ? sd : NULL;
}

static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
{
	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
	struct sh_mobile_ceu_dev *pcdev = ici->priv;
	struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
	int ret;

	if (csi2_sd) {
		csi2_sd->grp_id = soc_camera_grp_id(icd);
		v4l2_set_subdev_hostdata(csi2_sd, icd);
	}

	ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
		return ret;

	/*
	 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
	 * has not found this soc-camera device among its clients
	 */
	if (csi2_sd && ret == -ENODEV)
		csi2_sd->grp_id = 0;

	dev_info(icd->parent,
		 "SuperH Mobile CEU%s driver attached to camera %d\n",
		 csi2_sd && csi2_sd->grp_id ? "/CSI-2" : "", icd->devnum);
		 "SuperH Mobile CEU driver attached to camera %d\n",
		 icd->devnum);

	return 0;
}

static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
{
	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
	struct sh_mobile_ceu_dev *pcdev = ici->priv;
	struct v4l2_subdev *csi2_sd = find_csi2(pcdev);

	dev_info(icd->parent,
		 "SuperH Mobile CEU driver detached from camera %d\n",
		 icd->devnum);

	v4l2_subdev_call(csi2_sd, core, s_power, 0);
}

/* Called with .host_lock held */
@@ -704,12 +644,6 @@ static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
		cdwdr_width *= 2;
	}

	/* CSI2 special configuration */
	if (csi2_subdev(pcdev, icd)) {
		in_width = ((in_width - 2) * 2);
		left_offset *= 2;
	}

	/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
	camor = left_offset | (top_offset << 16);

@@ -758,13 +692,6 @@ static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
		ceu_write(pcdev, CAPSR, capsr);
}

/* Find the bus subdevice driver, e.g., CSI2 */
static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
					   struct soc_camera_device *icd)
{
	return csi2_subdev(pcdev, icd) ? : soc_camera_to_subdev(icd);
}

#define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |	\
		V4L2_MBUS_PCLK_SAMPLE_RISING |	\
		V4L2_MBUS_HSYNC_ACTIVE_HIGH |	\
@@ -778,7 +705,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
{
	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
	struct sh_mobile_ceu_dev *pcdev = ici->priv;
	struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
	struct sh_mobile_ceu_cam *cam = icd->host_priv;
	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
	unsigned long value, common_flags = CEU_BUS_FLAGS;
@@ -866,9 +793,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
	value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
	value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;

	if (csi2_subdev(pcdev, icd)) /* CSI2 mode */
		value |= 3 << 12;
	else if (pcdev->is_16bit)
	if (pcdev->is_16bit)
		value |= 1 << 12;
	else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
		value |= 2 << 12;
@@ -923,9 +848,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
				       unsigned char buswidth)
{
	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
	struct sh_mobile_ceu_dev *pcdev = ici->priv;
	struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
	struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
	unsigned long common_flags = CEU_BUS_FLAGS;
	struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
	int ret;
@@ -1046,12 +969,9 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
		return 0;
	}

	if (!csi2_subdev(pcdev, icd)) {
		/* Are there any restrictions in the CSI-2 case? */
	ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
	if (ret < 0)
		return 0;
	}

	if (!icd->host_priv) {
		struct v4l2_subdev_format fmt = {
@@ -1721,12 +1641,11 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
	struct resource *res;
	void __iomem *base;
	unsigned int irq;
	int err, i;
	int err;
	struct bus_wait wait = {
		.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
		.notifier.notifier_call = bus_notify,
	};
	struct sh_mobile_ceu_companion *csi2;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	irq = platform_get_irq(pdev, 0);
@@ -1821,132 +1740,16 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
	pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;

	if (pcdev->pdata && pcdev->pdata->asd_sizes) {
		struct v4l2_async_subdev **asd;
		char name[] = "sh-mobile-csi2";
		int j;

		/*
		 * CSI2 interfacing: several groups can use CSI2, pick up the
		 * first one
		 */
		asd = pcdev->pdata->asd;
		for (j = 0; pcdev->pdata->asd_sizes[j]; j++) {
			for (i = 0; i < pcdev->pdata->asd_sizes[j]; i++, asd++) {
				dev_dbg(&pdev->dev, "%s(): subdev #%d, type %u\n",
					__func__, i, (*asd)->match_type);
				if ((*asd)->match_type == V4L2_ASYNC_MATCH_DEVNAME &&
				    !strncmp(name, (*asd)->match.device_name.name,
					     sizeof(name) - 1)) {
					pcdev->csi2_asd = *asd;
					break;
				}
			}
			if (pcdev->csi2_asd)
				break;
		}

		pcdev->ici.asd = pcdev->pdata->asd;
		pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
	}

	/* Legacy CSI2 interfacing */
	csi2 = pcdev->pdata ? pcdev->pdata->csi2 : NULL;
	if (csi2) {
		/*
		 * TODO: remove this once all users are converted to
		 * asynchronous CSI2 probing. If it has to be kept, csi2
		 * platform device resources have to be added, using
		 * platform_device_add_resources()
		 */
		struct platform_device *csi2_pdev =
			platform_device_alloc("sh-mobile-csi2", csi2->id);
		struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;

		if (!csi2_pdev) {
			err = -ENOMEM;
			goto exit_free_clk;
		}

		pcdev->csi2_pdev		= csi2_pdev;

		err = platform_device_add_data(csi2_pdev, csi2_pdata,
					       sizeof(*csi2_pdata));
		if (err < 0)
			goto exit_pdev_put;

		csi2_pdev->resource		= csi2->resource;
		csi2_pdev->num_resources	= csi2->num_resources;

		err = platform_device_add(csi2_pdev);
		if (err < 0)
			goto exit_pdev_put;

		wait.dev = &csi2_pdev->dev;

		err = bus_register_notifier(&platform_bus_type, &wait.notifier);
		if (err < 0)
			goto exit_pdev_unregister;

		/*
		 * From this point the driver module will not unload, until
		 * we complete the completion.
		 */

		if (!csi2_pdev->dev.driver) {
			complete(&wait.completion);
			/* Either too late, or probing failed */
			bus_unregister_notifier(&platform_bus_type, &wait.notifier);
			err = -ENXIO;
			goto exit_pdev_unregister;
		}

		/*
		 * The module is still loaded, in the worst case it is hanging
		 * in device release on our completion. So, _now_ dereferencing
		 * the "owner" is safe!
		 */

		err = try_module_get(csi2_pdev->dev.driver->owner);

		/* Let notifier complete, if it has been locked */
		complete(&wait.completion);
		bus_unregister_notifier(&platform_bus_type, &wait.notifier);
		if (!err) {
			err = -ENODEV;
			goto exit_pdev_unregister;
		}

		pcdev->csi2_sd = platform_get_drvdata(csi2_pdev);
	}

	err = soc_camera_host_register(&pcdev->ici);
	if (err)
		goto exit_csi2_unregister;

	if (csi2) {
		err = v4l2_device_register_subdev(&pcdev->ici.v4l2_dev,
						  pcdev->csi2_sd);
		dev_dbg(&pdev->dev, "%s(): ret(register_subdev) = %d\n",
			__func__, err);
		if (err < 0)
			goto exit_host_unregister;
		/* v4l2_device_register_subdev() took a reference too */
		module_put(pcdev->csi2_sd->owner);
	}
		goto exit_free_clk;

	return 0;

exit_host_unregister:
	soc_camera_host_unregister(&pcdev->ici);
exit_csi2_unregister:
	if (csi2) {
		module_put(pcdev->csi2_pdev->dev.driver->owner);
exit_pdev_unregister:
		platform_device_del(pcdev->csi2_pdev);
exit_pdev_put:
		pcdev->csi2_pdev->resource = NULL;
		platform_device_put(pcdev->csi2_pdev);
	}
exit_free_clk:
	pm_runtime_disable(&pdev->dev);
exit_release_mem:
@@ -1958,21 +1761,11 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
static int sh_mobile_ceu_remove(struct platform_device *pdev)
{
	struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
	struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
					struct sh_mobile_ceu_dev, ici);
	struct platform_device *csi2_pdev = pcdev->csi2_pdev;

	soc_camera_host_unregister(soc_host);
	pm_runtime_disable(&pdev->dev);
	if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
		dma_release_declared_memory(&pdev->dev);
	if (csi2_pdev && csi2_pdev->dev.driver) {
		struct module *csi2_drv = csi2_pdev->dev.driver->owner;
		platform_device_del(csi2_pdev);
		csi2_pdev->resource = NULL;
		platform_device_put(csi2_pdev);
		module_put(csi2_drv);
	}

	return 0;
}
@@ -2012,8 +1805,6 @@ static struct platform_driver sh_mobile_ceu_driver = {

static int __init sh_mobile_ceu_init(void)
{
	/* Whatever return code */
	request_module("sh_mobile_csi2");
	return platform_driver_register(&sh_mobile_ceu_driver);
}

+0 −400
Original line number Diff line number Diff line
/*
 * 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/err.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 <linux/module.h>

#include <media/drv-intf/sh_mobile_ceu.h>
#include <media/drv-intf/sh_mobile_csi2.h>
#include <media/soc_camera.h>
#include <media/drv-intf/soc_mediabus.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;
	unsigned int			irq;
	unsigned long			mipi_flags;
	void __iomem			*base;
	struct platform_device		*pdev;
	struct sh_csi2_client_config	*client;
};

static void sh_csi2_hwinit(struct sh_csi2 *priv);

static int sh_csi2_set_fmt(struct v4l2_subdev *sd,
		struct v4l2_subdev_pad_config *cfg,
		struct v4l2_subdev_format *format)
{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
	struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
	struct v4l2_mbus_framefmt *mf = &format->format;
	u32 tmp = (priv->client->channel & 3) << 8;

	if (format->pad)
		return -EINVAL;

	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 MEDIA_BUS_FMT_UYVY8_2X8:		/* YUV422 */
		case MEDIA_BUS_FMT_YUYV8_1_5X8:		/* YUV420 */
		case MEDIA_BUS_FMT_Y8_1X8:		/* RAW8 */
		case MEDIA_BUS_FMT_SBGGR8_1X8:
		case MEDIA_BUS_FMT_SGRBG8_1X8:
			break;
		default:
			/* All MIPI CSI-2 devices must support one of primary formats */
			mf->code = MEDIA_BUS_FMT_YUYV8_2X8;
		}
		break;
	case SH_CSI2I:
		switch (mf->code) {
		case MEDIA_BUS_FMT_Y8_1X8:		/* RAW8 */
		case MEDIA_BUS_FMT_SBGGR8_1X8:
		case MEDIA_BUS_FMT_SGRBG8_1X8:
		case MEDIA_BUS_FMT_SBGGR10_1X10:	/* RAW10 */
		case MEDIA_BUS_FMT_SBGGR12_1X12:	/* RAW12 */
			break;
		default:
			/* All MIPI CSI-2 devices must support one of primary formats */
			mf->code = MEDIA_BUS_FMT_SBGGR8_1X8;
		}
		break;
	}

	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
		cfg->try_fmt = *mf;
		return 0;
	}

	if (mf->width > 8188 || mf->width & 1)
		return -EINVAL;

	switch (mf->code) {
	case MEDIA_BUS_FMT_UYVY8_2X8:
		tmp |= 0x1e;	/* YUV422 8 bit */
		break;
	case MEDIA_BUS_FMT_YUYV8_1_5X8:
		tmp |= 0x18;	/* YUV420 8 bit */
		break;
	case MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE:
		tmp |= 0x21;	/* RGB555 */
		break;
	case MEDIA_BUS_FMT_RGB565_2X8_BE:
		tmp |= 0x22;	/* RGB565 */
		break;
	case MEDIA_BUS_FMT_Y8_1X8:
	case MEDIA_BUS_FMT_SBGGR8_1X8:
	case MEDIA_BUS_FMT_SGRBG8_1X8:
		tmp |= 0x2a;	/* RAW8 */
		break;
	default:
		return -EINVAL;
	}

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

	return 0;
}

static int sh_csi2_g_mbus_config(struct v4l2_subdev *sd,
				 struct v4l2_mbus_config *cfg)
{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);

	if (!priv->mipi_flags) {
		struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
		struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
		struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
		unsigned long common_flags, csi2_flags;
		struct v4l2_mbus_config client_cfg = {.type = V4L2_MBUS_CSI2,};
		int ret;

		/* Check if we can support this camera */
		csi2_flags = V4L2_MBUS_CSI2_CONTINUOUS_CLOCK |
			V4L2_MBUS_CSI2_1_LANE;

		switch (pdata->type) {
		case SH_CSI2C:
			if (priv->client->lanes != 1)
				csi2_flags |= V4L2_MBUS_CSI2_2_LANE;
			break;
		case SH_CSI2I:
			switch (priv->client->lanes) {
			default:
				csi2_flags |= V4L2_MBUS_CSI2_4_LANE;
			case 3:
				csi2_flags |= V4L2_MBUS_CSI2_3_LANE;
			case 2:
				csi2_flags |= V4L2_MBUS_CSI2_2_LANE;
			}
		}

		ret = v4l2_subdev_call(client_sd, video, g_mbus_config, &client_cfg);
		if (ret == -ENOIOCTLCMD)
			common_flags = csi2_flags;
		else if (!ret)
			common_flags = soc_mbus_config_compatible(&client_cfg,
								  csi2_flags);
		else
			common_flags = 0;

		if (!common_flags)
			return -EINVAL;

		/* All good: camera MIPI configuration supported */
		priv->mipi_flags = common_flags;
	}

	if (cfg) {
		cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING |
			V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
			V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH;
		cfg->type = V4L2_MBUS_PARALLEL;
	}

	return 0;
}

static int sh_csi2_s_mbus_config(struct v4l2_subdev *sd,
				 const struct v4l2_mbus_config *cfg)
{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
	struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
	struct v4l2_subdev *client_sd = soc_camera_to_subdev(icd);
	struct v4l2_mbus_config client_cfg = {.type = V4L2_MBUS_CSI2,};
	int ret = sh_csi2_g_mbus_config(sd, NULL);

	if (ret < 0)
		return ret;

	pm_runtime_get_sync(&priv->pdev->dev);

	sh_csi2_hwinit(priv);

	client_cfg.flags = priv->mipi_flags;

	return v4l2_subdev_call(client_sd, video, s_mbus_config, &client_cfg);
}

static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
	.g_mbus_config	= sh_csi2_g_mbus_config,
	.s_mbus_config	= sh_csi2_s_mbus_config,
};

static struct v4l2_subdev_pad_ops sh_csi2_subdev_pad_ops = {
	.set_fmt	= sh_csi2_set_fmt,
};

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);

	switch (pdata->type) {
	case SH_CSI2C:
		if (priv->client->lanes == 1)
			tmp |= 1;
		else
			/* Default - both lanes */
			tmp |= 3;
		break;
	case SH_CSI2I:
		if (!priv->client->lanes || priv->client->lanes > 4)
			/* Default - all 4 lanes */
			tmp |= 0xf;
		else
			tmp |= (1 << priv->client->lanes) - 1;
	}

	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_client_connect(struct sh_csi2 *priv)
{
	struct device *dev = v4l2_get_subdevdata(&priv->subdev);
	struct sh_csi2_pdata *pdata = dev->platform_data;
	struct soc_camera_device *icd = v4l2_get_subdev_hostdata(&priv->subdev);
	int i;

	if (priv->client)
		return -EBUSY;

	for (i = 0; i < pdata->num_clients; i++)
		if ((pdata->clients[i].pdev &&
		     &pdata->clients[i].pdev->dev == icd->pdev) ||
		    (icd->control &&
		     strcmp(pdata->clients[i].name, dev_name(icd->control))))
			break;

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

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

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

	return 0;
}

static void sh_csi2_client_disconnect(struct sh_csi2 *priv)
{
	if (!priv->client)
		return;

	priv->client = NULL;

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

static int sh_csi2_s_power(struct v4l2_subdev *sd, int on)
{
	struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);

	if (on)
		return sh_csi2_client_connect(priv);

	sh_csi2_client_disconnect(priv);
	return 0;
}

static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops = {
	.s_power	= sh_csi2_s_power,
};

static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
	.core	= &sh_csi2_subdev_core_ops,
	.video	= &sh_csi2_subdev_video_ops,
	.pad	= &sh_csi2_subdev_pad_ops,
};

static 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;

	if (!pdata)
		return -EINVAL;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_csi2), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

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

	if (!res || (int)irq <= 0) {
		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->irq = irq;

	priv->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(priv->base))
		return PTR_ERR(priv->base);

	priv->pdev = pdev;
	priv->subdev.owner = THIS_MODULE;
	priv->subdev.dev = &pdev->dev;
	platform_set_drvdata(pdev, &priv->subdev);

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

	snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.mipi-csi",
		 dev_name(&pdev->dev));

	ret = v4l2_async_register_subdev(&priv->subdev);
	if (ret < 0)
		return ret;

	pm_runtime_enable(&pdev->dev);

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

	return 0;
}

static int sh_csi2_remove(struct platform_device *pdev)
{
	struct v4l2_subdev *subdev = platform_get_drvdata(pdev);
	struct sh_csi2 *priv = container_of(subdev, struct sh_csi2, subdev);

	v4l2_async_unregister_subdev(&priv->subdev);
	pm_runtime_disable(&pdev->dev);

	return 0;
}

static struct platform_driver __refdata sh_csi2_pdrv = {
	.remove	= sh_csi2_remove,
	.probe	= sh_csi2_probe,
	.driver	= {
		.name	= "sh-mobile-csi2",
	},
};

module_platform_driver(sh_csi2_pdrv);

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");
+0 −1
Original line number Diff line number Diff line
@@ -21,7 +21,6 @@ struct sh_mobile_ceu_info {
	unsigned long flags;
	int max_width;
	int max_height;
	struct sh_mobile_ceu_companion *csi2;
	struct v4l2_async_subdev **asd;	/* Flat array, arranged in groups */
	unsigned int *asd_sizes;	/* 0-terminated array pf asd group sizes */
};
Loading