[deliverable/linux.git] / drivers / media / platform / s3c-camif / camif-core.c

/*
 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
 *
 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.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.
 */
#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__

#include <linux/bug.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/version.h>

#include <media/media-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>

#include "camif-core.h"

static char *camif_clocks[CLK_MAX_NUM] = {
	/* HCLK CAMIF clock */
	[CLK_GATE]	= "camif",
	/* CAMIF / external camera sensor master clock */
	[CLK_CAM]	= "camera",
};

static const struct camif_fmt camif_formats[] = {
	{
		.name		= "YUV 4:2:2 planar, Y/Cb/Cr",
		.fourcc		= V4L2_PIX_FMT_YUV422P,
		.depth		= 16,
		.ybpp		= 1,
		.color		= IMG_FMT_YCBCR422P,
		.colplanes	= 3,
		.flags		= FMT_FL_S3C24XX_CODEC |
				  FMT_FL_S3C64XX,
	}, {
		.name		= "YUV 4:2:0 planar, Y/Cb/Cr",
		.fourcc		= V4L2_PIX_FMT_YUV420,
		.depth		= 12,
		.ybpp		= 1,
		.color		= IMG_FMT_YCBCR420,
		.colplanes	= 3,
		.flags		= FMT_FL_S3C24XX_CODEC |
				  FMT_FL_S3C64XX,
	}, {
		.name		= "YVU 4:2:0 planar, Y/Cr/Cb",
		.fourcc		= V4L2_PIX_FMT_YVU420,
		.depth		= 12,
		.ybpp		= 1,
		.color		= IMG_FMT_YCRCB420,
		.colplanes	= 3,
		.flags		= FMT_FL_S3C24XX_CODEC |
				  FMT_FL_S3C64XX,
	}, {
		.name		= "RGB565, 16 bpp",
		.fourcc		= V4L2_PIX_FMT_RGB565X,
		.depth		= 16,
		.ybpp		= 2,
		.color		= IMG_FMT_RGB565,
		.colplanes	= 1,
		.flags		= FMT_FL_S3C24XX_PREVIEW |
				  FMT_FL_S3C64XX,
	}, {
		.name		= "XRGB8888, 32 bpp",
		.fourcc		= V4L2_PIX_FMT_RGB32,
		.depth		= 32,
		.ybpp		= 4,
		.color		= IMG_FMT_XRGB8888,
		.colplanes	= 1,
		.flags		= FMT_FL_S3C24XX_PREVIEW |
				  FMT_FL_S3C64XX,
	}, {
		.name		= "BGR666",
		.fourcc		= V4L2_PIX_FMT_BGR666,
		.depth		= 32,
		.ybpp		= 4,
		.color		= IMG_FMT_RGB666,
		.colplanes	= 1,
		.flags		= FMT_FL_S3C64XX,
	}
};

/**
 * s3c_camif_find_format() - lookup camif color format by fourcc or an index
 * @pixelformat: fourcc to match, ignored if null
 * @index: index to the camif_formats array, ignored if negative
 */
const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
					      const u32 *pixelformat,
					      int index)
{
	const struct camif_fmt *fmt, *def_fmt = NULL;
	unsigned int i;
	int id = 0;

	if (index >= (int)ARRAY_SIZE(camif_formats))
		return NULL;

	for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
		fmt = &camif_formats[i];
		if (vp && !(vp->fmt_flags & fmt->flags))
			continue;
		if (pixelformat && fmt->fourcc == *pixelformat)
			return fmt;
		if (index == id)
			def_fmt = fmt;
		id++;
	}
	return def_fmt;
}

static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
{
	unsigned int sh = 6;

	if (src >= 64 * tar)
		return -EINVAL;

	while (sh--) {
		unsigned int tmp = 1 << sh;
		if (src >= tar * tmp) {
			*shift = sh, *ratio = tmp;
			return 0;
		}
	}
	*shift = 0, *ratio = 1;
	return 0;
}

int s3c_camif_get_scaler_config(struct camif_vp *vp,
				struct camif_scaler *scaler)
{
	struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
	int source_x = camif_crop->width;
	int source_y = camif_crop->height;
	int target_x = vp->out_frame.rect.width;
	int target_y = vp->out_frame.rect.height;
	int ret;

	if (vp->rotation == 90 || vp->rotation == 270)
		swap(target_x, target_y);

	ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
				      &scaler->h_shift);
	if (ret < 0)
		return ret;

	ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
				      &scaler->v_shift);
	if (ret < 0)
		return ret;

	scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
	scaler->pre_dst_height = source_y / scaler->pre_v_ratio;

	scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
	scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);

	scaler->scaleup_h = (target_x >= source_x);
	scaler->scaleup_v = (target_y >= source_y);

	scaler->copy = 0;

	pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
		 scaler->pre_h_ratio, scaler->h_shift,
		 scaler->pre_v_ratio, scaler->v_shift);

	pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
		 source_x, source_y, target_x, target_y,
		 scaler->scaleup_h, scaler->scaleup_v);

	return 0;
}

static int camif_register_sensor(struct camif_dev *camif)
{
	struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
	struct i2c_adapter *adapter;
	struct v4l2_subdev_format format;
	struct v4l2_subdev *sd;
	int ret;

	camif->sensor.sd = NULL;

	if (sensor->i2c_board_info.addr == 0)
		return -EINVAL;

	adapter = i2c_get_adapter(sensor->i2c_bus_num);
	if (adapter == NULL) {
		v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
			  sensor->i2c_bus_num);
		return -EPROBE_DEFER;
	}

	sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
				       &sensor->i2c_board_info, NULL);
	if (sd == NULL) {
		i2c_put_adapter(adapter);
		v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
			  sensor->i2c_board_info.type);
		return -EPROBE_DEFER;
	}
	camif->sensor.sd = sd;

	v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);

	/* Get initial pixel format and set it at the camif sink pad */
	format.pad = 0;
	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);

	if (ret < 0)
		return 0;

	format.pad = CAMIF_SD_PAD_SINK;
	v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);

	v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
		  format.format.width, format.format.height,
		  format.format.code);
	return 0;
}

static void camif_unregister_sensor(struct camif_dev *camif)
{
	struct v4l2_subdev *sd = camif->sensor.sd;
	struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
	struct i2c_adapter *adapter;

	if (client == NULL)
		return;

	adapter = client->adapter;
	v4l2_device_unregister_subdev(sd);
	camif->sensor.sd = NULL;
	i2c_unregister_device(client);
	i2c_put_adapter(adapter);
}

static int camif_create_media_links(struct camif_dev *camif)
{
	int i, ret;

	ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
				&camif->subdev.entity, CAMIF_SD_PAD_SINK,
				MEDIA_LNK_FL_IMMUTABLE |
				MEDIA_LNK_FL_ENABLED);
	if (ret)
		return ret;

	for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
		ret = media_create_pad_link(&camif->subdev.entity, i,
				&camif->vp[i - 1].vdev.entity, 0,
				MEDIA_LNK_FL_IMMUTABLE |
				MEDIA_LNK_FL_ENABLED);
	}

	return ret;
}

static int camif_register_video_nodes(struct camif_dev *camif)
{
	int ret = s3c_camif_register_video_node(camif, VP_CODEC);
	if (ret < 0)
		return ret;

	return s3c_camif_register_video_node(camif, VP_PREVIEW);
}

static void camif_unregister_video_nodes(struct camif_dev *camif)
{
	s3c_camif_unregister_video_node(camif, VP_CODEC);
	s3c_camif_unregister_video_node(camif, VP_PREVIEW);
}

static void camif_unregister_media_entities(struct camif_dev *camif)
{
	camif_unregister_video_nodes(camif);
	camif_unregister_sensor(camif);
	s3c_camif_unregister_subdev(camif);
}

/*
 * Media device
 */
static int camif_media_dev_init(struct camif_dev *camif)
{
	struct media_device *md = &camif->media_dev;
	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
	unsigned int ip_rev = camif->variant->ip_revision;
	int ret;

	memset(md, 0, sizeof(*md));
	snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
		 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
	strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
	md->hw_revision = ip_rev;
	md->driver_version = KERNEL_VERSION(1, 0, 0);

	md->dev = camif->dev;

	strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
	v4l2_dev->mdev = md;

	media_device_init(md);

	ret = v4l2_device_register(camif->dev, v4l2_dev);
	if (ret < 0)
		return ret;

	return ret;
}

static void camif_clk_put(struct camif_dev *camif)
{
	int i;

	for (i = 0; i < CLK_MAX_NUM; i++) {
		if (IS_ERR(camif->clock[i]))
			continue;
		clk_unprepare(camif->clock[i]);
		clk_put(camif->clock[i]);
		camif->clock[i] = ERR_PTR(-EINVAL);
	}
}

static int camif_clk_get(struct camif_dev *camif)
{
	int ret, i;

	for (i = 1; i < CLK_MAX_NUM; i++)
		camif->clock[i] = ERR_PTR(-EINVAL);

	for (i = 0; i < CLK_MAX_NUM; i++) {
		camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
		if (IS_ERR(camif->clock[i])) {
			ret = PTR_ERR(camif->clock[i]);
			goto err;
		}
		ret = clk_prepare(camif->clock[i]);
		if (ret < 0) {
			clk_put(camif->clock[i]);
			camif->clock[i] = NULL;
			goto err;
		}
	}
	return 0;
err:
	camif_clk_put(camif);
	dev_err(camif->dev, "failed to get clock: %s\n",
		camif_clocks[i]);
	return ret;
}

/*
 * The CAMIF device has two relatively independent data processing paths
 * that can source data from memory or the common camera input frontend.
 * Register interrupts for each data processing path (camif_vp).
 */
static int camif_request_irqs(struct platform_device *pdev,
			      struct camif_dev *camif)
{
	int irq, ret, i;

	for (i = 0; i < CAMIF_VP_NUM; i++) {
		struct camif_vp *vp = &camif->vp[i];

		init_waitqueue_head(&vp->irq_queue);

		irq = platform_get_irq(pdev, i);
		if (irq <= 0) {
			dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
			return -ENXIO;
		}

		ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
				       0, dev_name(&pdev->dev), vp);
		if (ret < 0) {
			dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
			break;
		}
	}

	return ret;
}

static int s3c_camif_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct s3c_camif_plat_data *pdata = dev->platform_data;
	struct s3c_camif_drvdata *drvdata;
	struct camif_dev *camif;
	struct resource *mres;
	int ret = 0;

	camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
	if (!camif)
		return -ENOMEM;

	spin_lock_init(&camif->slock);
	mutex_init(&camif->lock);

	camif->dev = dev;

	if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
		dev_err(dev, "wrong platform data\n");
		return -EINVAL;
	}

	camif->pdata = *pdata;
	drvdata = (void *)platform_get_device_id(pdev)->driver_data;
	camif->variant = drvdata->variant;

	mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	camif->io_base = devm_ioremap_resource(dev, mres);
	if (IS_ERR(camif->io_base))
		return PTR_ERR(camif->io_base);

	ret = camif_request_irqs(pdev, camif);
	if (ret < 0)
		return ret;

	ret = pdata->gpio_get();
	if (ret < 0)
		return ret;

	ret = s3c_camif_create_subdev(camif);
	if (ret < 0)
		goto err_sd;

	ret = camif_clk_get(camif);
	if (ret < 0)
		goto err_clk;

	platform_set_drvdata(pdev, camif);
	clk_set_rate(camif->clock[CLK_CAM],
			camif->pdata.sensor.clock_frequency);

	dev_info(dev, "sensor clock frequency: %lu\n",
		 clk_get_rate(camif->clock[CLK_CAM]));
	/*
	 * Set initial pixel format, resolution and crop rectangle.
	 * Must be done before a sensor subdev is registered as some
	 * settings are overrode with values from sensor subdev.
	 */
	s3c_camif_set_defaults(camif);

	pm_runtime_enable(dev);

	ret = pm_runtime_get_sync(dev);
	if (ret < 0)
		goto err_pm;

	/* Initialize contiguous memory allocator */
	camif->alloc_ctx = vb2_dma_contig_init_ctx(dev);
	if (IS_ERR(camif->alloc_ctx)) {
		ret = PTR_ERR(camif->alloc_ctx);
		goto err_alloc;
	}

	ret = camif_media_dev_init(camif);
	if (ret < 0)
		goto err_mdev;

	ret = camif_register_sensor(camif);
	if (ret < 0)
		goto err_sens;

	ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
	if (ret < 0)
		goto err_sens;

	ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
	if (ret < 0)
		goto err_sens;

	ret = camif_register_video_nodes(camif);
	if (ret < 0)
		goto err_sens;

	ret = camif_create_media_links(camif);
	if (ret < 0)
		goto err_sens;

	ret = media_device_register(&camif->media_dev);
	if (ret < 0)
		goto err_sens;

	pm_runtime_put(dev);
	return 0;

err_sens:
	v4l2_device_unregister(&camif->v4l2_dev);
	media_device_unregister(&camif->media_dev);
	media_device_cleanup(&camif->media_dev);
	camif_unregister_media_entities(camif);
err_mdev:
	vb2_dma_contig_cleanup_ctx(camif->alloc_ctx);
err_alloc:
	pm_runtime_put(dev);
	pm_runtime_disable(dev);
err_pm:
	camif_clk_put(camif);
err_clk:
	s3c_camif_unregister_subdev(camif);
err_sd:
	pdata->gpio_put();
	return ret;
}

static int s3c_camif_remove(struct platform_device *pdev)
{
	struct camif_dev *camif = platform_get_drvdata(pdev);
	struct s3c_camif_plat_data *pdata = &camif->pdata;

	media_device_unregister(&camif->media_dev);
	media_device_cleanup(&camif->media_dev);
	camif_unregister_media_entities(camif);
	v4l2_device_unregister(&camif->v4l2_dev);

	pm_runtime_disable(&pdev->dev);
	camif_clk_put(camif);
	pdata->gpio_put();

	return 0;
}

static int s3c_camif_runtime_resume(struct device *dev)
{
	struct camif_dev *camif = dev_get_drvdata(dev);

	clk_enable(camif->clock[CLK_GATE]);
	/* null op on s3c244x */
	clk_enable(camif->clock[CLK_CAM]);
	return 0;
}

static int s3c_camif_runtime_suspend(struct device *dev)
{
	struct camif_dev *camif = dev_get_drvdata(dev);

	/* null op on s3c244x */
	clk_disable(camif->clock[CLK_CAM]);

	clk_disable(camif->clock[CLK_GATE]);
	return 0;
}

static const struct s3c_camif_variant s3c244x_camif_variant = {
	.vp_pix_limits = {
		[VP_CODEC] = {
			.max_out_width		= 4096,
			.max_sc_out_width	= 2048,
			.out_width_align	= 16,
			.min_out_width		= 16,
			.max_height		= 4096,
		},
		[VP_PREVIEW] = {
			.max_out_width		= 640,
			.max_sc_out_width	= 640,
			.out_width_align	= 16,
			.min_out_width		= 16,
			.max_height		= 480,
		}
	},
	.pix_limits = {
		.win_hor_offset_align	= 8,
	},
	.ip_revision = S3C244X_CAMIF_IP_REV,
};

static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
	.variant	= &s3c244x_camif_variant,
	.bus_clk_freq	= 24000000UL,
};

static const struct s3c_camif_variant s3c6410_camif_variant = {
	.vp_pix_limits = {
		[VP_CODEC] = {
			.max_out_width		= 4096,
			.max_sc_out_width	= 2048,
			.out_width_align	= 16,
			.min_out_width		= 16,
			.max_height		= 4096,
		},
		[VP_PREVIEW] = {
			.max_out_width		= 4096,
			.max_sc_out_width	= 720,
			.out_width_align	= 16,
			.min_out_width		= 16,
			.max_height		= 4096,
		}
	},
	.pix_limits = {
		.win_hor_offset_align	= 8,
	},
	.ip_revision = S3C6410_CAMIF_IP_REV,
	.has_img_effect = 1,
	.vp_offset = 0x20,
};

static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
	.variant	= &s3c6410_camif_variant,
	.bus_clk_freq	= 133000000UL,
};

static const struct platform_device_id s3c_camif_driver_ids[] = {
	{
		.name		= "s3c2440-camif",
		.driver_data	= (unsigned long)&s3c244x_camif_drvdata,
	}, {
		.name		= "s3c6410-camif",
		.driver_data	= (unsigned long)&s3c6410_camif_drvdata,
	},
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);

static const struct dev_pm_ops s3c_camif_pm_ops = {
	.runtime_suspend	= s3c_camif_runtime_suspend,
	.runtime_resume		= s3c_camif_runtime_resume,
};

static struct platform_driver s3c_camif_driver = {
	.probe		= s3c_camif_probe,
	.remove		= s3c_camif_remove,
	.id_table	= s3c_camif_driver_ids,
	.driver = {
		.name	= S3C_CAMIF_DRIVER_NAME,
		.pm	= &s3c_camif_pm_ops,
	}
};

module_platform_driver(s3c_camif_driver);

MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
babde1c2 SN	1	/*
	2	* s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
	3	*
	4	* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
	5	* Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published
	9	* by the Free Software Foundation, either version 2 of the License,
	10	* or (at your option) any later version.
	11	*/
	12	#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
	13
	14	#include <linux/bug.h>
	15	#include <linux/clk.h>
	16	#include <linux/delay.h>
	17	#include <linux/device.h>
	18	#include <linux/errno.h>
	19	#include <linux/gpio.h>
	20	#include <linux/i2c.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/io.h>
	23	#include <linux/kernel.h>
	24	#include <linux/list.h>
	25	#include <linux/module.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/pm_runtime.h>
	28	#include <linux/slab.h>
	29	#include <linux/types.h>
250539a3	30	#include <linux/version.h>
babde1c2 SN	31
	32	#include <media/media-device.h>
	33	#include <media/v4l2-ctrls.h>
	34	#include <media/v4l2-ioctl.h>
c139990e	35	#include <media/videobuf2-v4l2.h>
babde1c2 SN	36	#include <media/videobuf2-dma-contig.h>
	37
	38	#include "camif-core.h"
	39
	40	static char *camif_clocks[CLK_MAX_NUM] = {
	41	/* HCLK CAMIF clock */
	42	[CLK_GATE] = "camif",
	43	/* CAMIF / external camera sensor master clock */
	44	[CLK_CAM] = "camera",
	45	};
	46
	47	static const struct camif_fmt camif_formats[] = {
	48	{
	49	.name = "YUV 4:2:2 planar, Y/Cb/Cr",
	50	.fourcc = V4L2_PIX_FMT_YUV422P,
	51	.depth = 16,
	52	.ybpp = 1,
	53	.color = IMG_FMT_YCBCR422P,
	54	.colplanes = 3,
	55	.flags = FMT_FL_S3C24XX_CODEC \|
	56	FMT_FL_S3C64XX,
	57	}, {
	58	.name = "YUV 4:2:0 planar, Y/Cb/Cr",
	59	.fourcc = V4L2_PIX_FMT_YUV420,
	60	.depth = 12,
	61	.ybpp = 1,
	62	.color = IMG_FMT_YCBCR420,
	63	.colplanes = 3,
	64	.flags = FMT_FL_S3C24XX_CODEC \|
	65	FMT_FL_S3C64XX,
	66	}, {
	67	.name = "YVU 4:2:0 planar, Y/Cr/Cb",
	68	.fourcc = V4L2_PIX_FMT_YVU420,
	69	.depth = 12,
	70	.ybpp = 1,
	71	.color = IMG_FMT_YCRCB420,
	72	.colplanes = 3,
	73	.flags = FMT_FL_S3C24XX_CODEC \|
	74	FMT_FL_S3C64XX,
	75	}, {
	76	.name = "RGB565, 16 bpp",
	77	.fourcc = V4L2_PIX_FMT_RGB565X,
	78	.depth = 16,
	79	.ybpp = 2,
	80	.color = IMG_FMT_RGB565,
	81	.colplanes = 1,
	82	.flags = FMT_FL_S3C24XX_PREVIEW \|
	83	FMT_FL_S3C64XX,
	84	}, {
	85	.name = "XRGB8888, 32 bpp",
	86	.fourcc = V4L2_PIX_FMT_RGB32,
	87	.depth = 32,
	88	.ybpp = 4,
	89	.color = IMG_FMT_XRGB8888,
	90	.colplanes = 1,
	91	.flags = FMT_FL_S3C24XX_PREVIEW \|
	92	FMT_FL_S3C64XX,
	93	}, {
	94	.name = "BGR666",
	95	.fourcc = V4L2_PIX_FMT_BGR666,
	96	.depth = 32,
	97	.ybpp = 4,
	98	.color = IMG_FMT_RGB666,
	99	.colplanes = 1,
100	.flags = FMT_FL_S3C64XX,
101	}
102	};
103
104	/**
105	* s3c_camif_find_format() - lookup camif color format by fourcc or an index
106	* @pixelformat: fourcc to match, ignored if null
107	* @index: index to the camif_formats array, ignored if negative
108	*/
109	const struct camif_fmt s3c_camif_find_format(struct camif_vp vp,
110	const u32 *pixelformat,
111	int index)
112	{
113	const struct camif_fmt fmt, def_fmt = NULL;
114	unsigned int i;
115	int id = 0;
116
117	if (index >= (int)ARRAY_SIZE(camif_formats))
118	return NULL;
119
120	for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
121	fmt = &camif_formats[i];
122	if (vp && !(vp->fmt_flags & fmt->flags))
123	continue;
124	if (pixelformat && fmt->fourcc == *pixelformat)
125	return fmt;
126	if (index == id)
127	def_fmt = fmt;
128	id++;
129	}
130	return def_fmt;
131	}
132
133	static int camif_get_scaler_factor(u32 src, u32 tar, u32 ratio, u32 shift)
134	{
135	unsigned int sh = 6;
136
137	if (src >= 64 * tar)
138	return -EINVAL;
139
140	while (sh--) {
141	unsigned int tmp = 1 << sh;
142	if (src >= tar * tmp) {
143	shift = sh, ratio = tmp;
144	return 0;
145	}
146	}
147	shift = 0, ratio = 1;
148	return 0;
149	}
150
151	int s3c_camif_get_scaler_config(struct camif_vp *vp,
152	struct camif_scaler *scaler)
153	{
154	struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
155	int source_x = camif_crop->width;
156	int source_y = camif_crop->height;
157	int target_x = vp->out_frame.rect.width;
158	int target_y = vp->out_frame.rect.height;
159	int ret;
160
161	if (vp->rotation == 90 \|\| vp->rotation == 270)
162	swap(target_x, target_y);
163
164	ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
165	&scaler->h_shift);
166	if (ret < 0)
167	return ret;
168
169	ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
170	&scaler->v_shift);
171	if (ret < 0)
172	return ret;
173
174	scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
175	scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
176
177	scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
178	scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
179
180	scaler->scaleup_h = (target_x >= source_x);
181	scaler->scaleup_v = (target_y >= source_y);
182
183	scaler->copy = 0;
184
185	pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
186	scaler->pre_h_ratio, scaler->h_shift,
187	scaler->pre_v_ratio, scaler->v_shift);
188
189	pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
190	source_x, source_y, target_x, target_y,
191	scaler->scaleup_h, scaler->scaleup_v);
192
193	return 0;
194	}
195
196	static int camif_register_sensor(struct camif_dev *camif)
197	{
198	struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
199	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
200	struct i2c_adapter *adapter;
201	struct v4l2_subdev_format format;
202	struct v4l2_subdev *sd;
203	int ret;
204
205	camif->sensor.sd = NULL;
206
207	if (sensor->i2c_board_info.addr == 0)
208	return -EINVAL;
209
210	adapter = i2c_get_adapter(sensor->i2c_bus_num);
211	if (adapter == NULL) {
212	v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
213	sensor->i2c_bus_num);
214	return -EPROBE_DEFER;
215	}
216
217	sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
218	&sensor->i2c_board_info, NULL);
219	if (sd == NULL) {
220	i2c_put_adapter(adapter);
221	v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
222	sensor->i2c_board_info.type);
223	return -EPROBE_DEFER;
224	}
225	camif->sensor.sd = sd;
226
227	v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
228
229	/* Get initial pixel format and set it at the camif sink pad */
230	format.pad = 0;
231	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
232	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
233
234	if (ret < 0)
235	return 0;
236
237	format.pad = CAMIF_SD_PAD_SINK;
238	v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
239
240	v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
241	format.format.width, format.format.height,
242	format.format.code);
243	return 0;
244	}
245
246	static void camif_unregister_sensor(struct camif_dev *camif)
247	{
248	struct v4l2_subdev *sd = camif->sensor.sd;
249	struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
250	struct i2c_adapter *adapter;
251
252	if (client == NULL)
253	return;
254
255	adapter = client->adapter;
256	v4l2_device_unregister_subdev(sd);
257	camif->sensor.sd = NULL;
258	i2c_unregister_device(client);
332b295d	259	i2c_put_adapter(adapter);
babde1c2 SN	260	}
	261
	262	static int camif_create_media_links(struct camif_dev *camif)
	263	{
	264	int i, ret;
	265
8df00a15	266	ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
babde1c2 SN	267	&camif->subdev.entity, CAMIF_SD_PAD_SINK,
	268	MEDIA_LNK_FL_IMMUTABLE \|
	269	MEDIA_LNK_FL_ENABLED);
	270	if (ret)
	271	return ret;
	272
	273	for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
8df00a15	274	ret = media_create_pad_link(&camif->subdev.entity, i,
babde1c2 SN	275	&camif->vp[i - 1].vdev.entity, 0,
	276	MEDIA_LNK_FL_IMMUTABLE \|
	277	MEDIA_LNK_FL_ENABLED);
	278	}
	279
	280	return ret;
	281	}
	282
	283	static int camif_register_video_nodes(struct camif_dev *camif)
	284	{
	285	int ret = s3c_camif_register_video_node(camif, VP_CODEC);
	286	if (ret < 0)
	287	return ret;
	288
	289	return s3c_camif_register_video_node(camif, VP_PREVIEW);
	290	}
	291
	292	static void camif_unregister_video_nodes(struct camif_dev *camif)
	293	{
	294	s3c_camif_unregister_video_node(camif, VP_CODEC);
	295	s3c_camif_unregister_video_node(camif, VP_PREVIEW);
	296	}
	297
	298	static void camif_unregister_media_entities(struct camif_dev *camif)
	299	{
	300	camif_unregister_video_nodes(camif);
	301	camif_unregister_sensor(camif);
	302	s3c_camif_unregister_subdev(camif);
	303	}
	304
	305	/*
	306	* Media device
	307	*/
9832e155	308	static int camif_media_dev_init(struct camif_dev *camif)
babde1c2 SN	309	{
	310	struct media_device *md = &camif->media_dev;
	311	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
	312	unsigned int ip_rev = camif->variant->ip_revision;
	313	int ret;
	314
	315	memset(md, 0, sizeof(*md));
	316	snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
	317	ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
	318	strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
	319	md->hw_revision = ip_rev;
	320	md->driver_version = KERNEL_VERSION(1, 0, 0);
	321
	322	md->dev = camif->dev;
	323
	324	strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
	325	v4l2_dev->mdev = md;
	326
2e7508e4 MCC	327	media_device_init(md);
2e7508e4 MCC	328
babde1c2 SN	329	ret = v4l2_device_register(camif->dev, v4l2_dev);
	330	if (ret < 0)
	331	return ret;
	332
babde1c2 SN	333	return ret;
	334	}
	335
	336	static void camif_clk_put(struct camif_dev *camif)
	337	{
	338	int i;
	339
	340	for (i = 0; i < CLK_MAX_NUM; i++) {
d46a5a68	341	if (IS_ERR(camif->clock[i]))
babde1c2 SN	342	continue;
	343	clk_unprepare(camif->clock[i]);
	344	clk_put(camif->clock[i]);
d46a5a68	345	camif->clock[i] = ERR_PTR(-EINVAL);
babde1c2 SN	346	}
	347	}
	348
	349	static int camif_clk_get(struct camif_dev *camif)
	350	{
	351	int ret, i;
	352
d46a5a68 SK	353	for (i = 1; i < CLK_MAX_NUM; i++)
	354	camif->clock[i] = ERR_PTR(-EINVAL);
	355
babde1c2 SN	356	for (i = 0; i < CLK_MAX_NUM; i++) {
	357	camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
	358	if (IS_ERR(camif->clock[i])) {
	359	ret = PTR_ERR(camif->clock[i]);
	360	goto err;
	361	}
	362	ret = clk_prepare(camif->clock[i]);
	363	if (ret < 0) {
	364	clk_put(camif->clock[i]);
	365	camif->clock[i] = NULL;
	366	goto err;
	367	}
	368	}
	369	return 0;
	370	err:
	371	camif_clk_put(camif);
	372	dev_err(camif->dev, "failed to get clock: %s\n",
	373	camif_clocks[i]);
	374	return ret;
	375	}
	376
	377	/*
	378	* The CAMIF device has two relatively independent data processing paths
	379	* that can source data from memory or the common camera input frontend.
	380	* Register interrupts for each data processing path (camif_vp).
	381	*/
	382	static int camif_request_irqs(struct platform_device *pdev,
	383	struct camif_dev *camif)
	384	{
	385	int irq, ret, i;
	386
	387	for (i = 0; i < CAMIF_VP_NUM; i++) {
	388	struct camif_vp *vp = &camif->vp[i];
	389
	390	init_waitqueue_head(&vp->irq_queue);
	391
	392	irq = platform_get_irq(pdev, i);
	393	if (irq <= 0) {
	394	dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
	395	return -ENXIO;
	396	}
	397
	398	ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
	399	0, dev_name(&pdev->dev), vp);
	400	if (ret < 0) {
	401	dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
	402	break;
	403	}
	404	}
	405
	406	return ret;
	407	}
	408
	409	static int s3c_camif_probe(struct platform_device *pdev)
	410	{
	411	struct device *dev = &pdev->dev;
	412	struct s3c_camif_plat_data *pdata = dev->platform_data;
	413	struct s3c_camif_drvdata *drvdata;
	414	struct camif_dev *camif;
	415	struct resource *mres;
	416	int ret = 0;
	417
	418	camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
	419	if (!camif)
420	return -ENOMEM;
421
422	spin_lock_init(&camif->slock);
423	mutex_init(&camif->lock);
424
425	camif->dev = dev;
426
427	if (!pdata \|\| !pdata->gpio_get \|\| !pdata->gpio_put) {
428	dev_err(dev, "wrong platform data\n");
429	return -EINVAL;
430	}
431
432	camif->pdata = *pdata;
433	drvdata = (void *)platform_get_device_id(pdev)->driver_data;
434	camif->variant = drvdata->variant;
435
436	mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
437
f23999ec TR	438	camif->io_base = devm_ioremap_resource(dev, mres);
	439	if (IS_ERR(camif->io_base))
	440	return PTR_ERR(camif->io_base);
babde1c2 SN	441
	442	ret = camif_request_irqs(pdev, camif);
	443	if (ret < 0)
	444	return ret;
	445
	446	ret = pdata->gpio_get();
	447	if (ret < 0)
	448	return ret;
	449
	450	ret = s3c_camif_create_subdev(camif);
	451	if (ret < 0)
	452	goto err_sd;
	453
	454	ret = camif_clk_get(camif);
	455	if (ret < 0)
	456	goto err_clk;
	457
	458	platform_set_drvdata(pdev, camif);
	459	clk_set_rate(camif->clock[CLK_CAM],
	460	camif->pdata.sensor.clock_frequency);
	461
	462	dev_info(dev, "sensor clock frequency: %lu\n",
	463	clk_get_rate(camif->clock[CLK_CAM]));
	464	/*
	465	* Set initial pixel format, resolution and crop rectangle.
	466	* Must be done before a sensor subdev is registered as some
	467	* settings are overrode with values from sensor subdev.
	468	*/
	469	s3c_camif_set_defaults(camif);
	470
	471	pm_runtime_enable(dev);
	472
	473	ret = pm_runtime_get_sync(dev);
	474	if (ret < 0)
	475	goto err_pm;
	476
	477	/* Initialize contiguous memory allocator */
	478	camif->alloc_ctx = vb2_dma_contig_init_ctx(dev);
	479	if (IS_ERR(camif->alloc_ctx)) {
	480	ret = PTR_ERR(camif->alloc_ctx);
	481	goto err_alloc;
	482	}
	483
9832e155	484	ret = camif_media_dev_init(camif);
babde1c2 SN	485	if (ret < 0)
	486	goto err_mdev;
	487
	488	ret = camif_register_sensor(camif);
	489	if (ret < 0)
	490	goto err_sens;
	491
	492	ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
	493	if (ret < 0)
	494	goto err_sens;
	495
babde1c2 SN	496	ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
babde1c2 SN	497	if (ret < 0)
9b15dfe0	498	goto err_sens;
babde1c2 SN	499
	500	ret = camif_register_video_nodes(camif);
	501	if (ret < 0)
9b15dfe0	502	goto err_sens;
babde1c2 SN	503
	504	ret = camif_create_media_links(camif);
	505	if (ret < 0)
9b15dfe0	506	goto err_sens;
9832e155 JMC	507
	508	ret = media_device_register(&camif->media_dev);
	509	if (ret < 0)
	510	goto err_sens;
	511
babde1c2 SN	512	pm_runtime_put(dev);
	513	return 0;
	514
babde1c2 SN	515	err_sens:
	516	v4l2_device_unregister(&camif->v4l2_dev);
	517	media_device_unregister(&camif->media_dev);
9832e155	518	media_device_cleanup(&camif->media_dev);
babde1c2 SN	519	camif_unregister_media_entities(camif);
	520	err_mdev:
	521	vb2_dma_contig_cleanup_ctx(camif->alloc_ctx);
	522	err_alloc:
	523	pm_runtime_put(dev);
	524	pm_runtime_disable(dev);
	525	err_pm:
	526	camif_clk_put(camif);
	527	err_clk:
	528	s3c_camif_unregister_subdev(camif);
	529	err_sd:
	530	pdata->gpio_put();
	531	return ret;
	532	}
	533
4c62e976	534	static int s3c_camif_remove(struct platform_device *pdev)
babde1c2 SN	535	{
	536	struct camif_dev *camif = platform_get_drvdata(pdev);
	537	struct s3c_camif_plat_data *pdata = &camif->pdata;
	538
	539	media_device_unregister(&camif->media_dev);
9832e155	540	media_device_cleanup(&camif->media_dev);
babde1c2 SN	541	camif_unregister_media_entities(camif);
	542	v4l2_device_unregister(&camif->v4l2_dev);
	543
	544	pm_runtime_disable(&pdev->dev);
	545	camif_clk_put(camif);
	546	pdata->gpio_put();
	547
	548	return 0;
	549	}
	550
	551	static int s3c_camif_runtime_resume(struct device *dev)
	552	{
	553	struct camif_dev *camif = dev_get_drvdata(dev);
	554
	555	clk_enable(camif->clock[CLK_GATE]);
	556	/* null op on s3c244x */
	557	clk_enable(camif->clock[CLK_CAM]);
	558	return 0;
	559	}
	560
	561	static int s3c_camif_runtime_suspend(struct device *dev)
	562	{
	563	struct camif_dev *camif = dev_get_drvdata(dev);
	564
	565	/* null op on s3c244x */
	566	clk_disable(camif->clock[CLK_CAM]);
	567
	568	clk_disable(camif->clock[CLK_GATE]);
	569	return 0;
	570	}
	571
	572	static const struct s3c_camif_variant s3c244x_camif_variant = {
	573	.vp_pix_limits = {
	574	[VP_CODEC] = {
	575	.max_out_width = 4096,
	576	.max_sc_out_width = 2048,
	577	.out_width_align = 16,
	578	.min_out_width = 16,
	579	.max_height = 4096,
	580	},
	581	[VP_PREVIEW] = {
	582	.max_out_width = 640,
	583	.max_sc_out_width = 640,
	584	.out_width_align = 16,
	585	.min_out_width = 16,
	586	.max_height = 480,
	587	}
	588	},
	589	.pix_limits = {
	590	.win_hor_offset_align = 8,
	591	},
	592	.ip_revision = S3C244X_CAMIF_IP_REV,
	593	};
	594
	595	static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
	596	.variant = &s3c244x_camif_variant,
	597	.bus_clk_freq = 24000000UL,
	598	};
	599
	600	static const struct s3c_camif_variant s3c6410_camif_variant = {
	601	.vp_pix_limits = {
	602	[VP_CODEC] = {
	603	.max_out_width = 4096,
	604	.max_sc_out_width = 2048,
605	.out_width_align = 16,
606	.min_out_width = 16,
607	.max_height = 4096,
608	},
609	[VP_PREVIEW] = {
610	.max_out_width = 4096,
611	.max_sc_out_width = 720,
612	.out_width_align = 16,
613	.min_out_width = 16,
614	.max_height = 4096,
615	}
616	},
617	.pix_limits = {
618	.win_hor_offset_align = 8,
619	},
620	.ip_revision = S3C6410_CAMIF_IP_REV,
621	.has_img_effect = 1,
622	.vp_offset = 0x20,
623	};
624
625	static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
626	.variant = &s3c6410_camif_variant,
627	.bus_clk_freq = 133000000UL,
628	};
629
ef00b7ae	630	static const struct platform_device_id s3c_camif_driver_ids[] = {
babde1c2 SN	631	{
	632	.name = "s3c2440-camif",
	633	.driver_data = (unsigned long)&s3c244x_camif_drvdata,
	634	}, {
	635	.name = "s3c6410-camif",
	636	.driver_data = (unsigned long)&s3c6410_camif_drvdata,
	637	},
	638	{ /* sentinel */ },
	639	};
	640	MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
	641
	642	static const struct dev_pm_ops s3c_camif_pm_ops = {
	643	.runtime_suspend = s3c_camif_runtime_suspend,
	644	.runtime_resume = s3c_camif_runtime_resume,
	645	};
	646
	647	static struct platform_driver s3c_camif_driver = {
	648	.probe = s3c_camif_probe,
4c62e976	649	.remove = s3c_camif_remove,
babde1c2 SN	650	.id_table = s3c_camif_driver_ids,
	651	.driver = {
	652	.name = S3C_CAMIF_DRIVER_NAME,
babde1c2 SN	653	.pm = &s3c_camif_pm_ops,
	654	}
	655	};
	656
	657	module_platform_driver(s3c_camif_driver);
	658
	659	MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
	660	MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
	661	MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
	662	MODULE_LICENSE("GPL");