[mirror_ubuntu-eoan-kernel.git] / drivers / media / platform / s3c-camif / camif-core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * 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>
 */
#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
 * @vp: video path (DMA) description (codec/preview)
 * @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");
	strscpy(md->bus_info, "platform", sizeof(md->bus_info));
	md->hw_revision = ip_rev;

	md->dev = camif->dev;

	strscpy(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;

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

	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_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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
babde1c2 SN	2	/*
	3	* s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
	4	*
	5	* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
	6	* Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
babde1c2 SN	7	*/
	8	#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
	9
	10	#include <linux/bug.h>
	11	#include <linux/clk.h>
	12	#include <linux/delay.h>
	13	#include <linux/device.h>
	14	#include <linux/errno.h>
	15	#include <linux/gpio.h>
	16	#include <linux/i2c.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/io.h>
	19	#include <linux/kernel.h>
	20	#include <linux/list.h>
	21	#include <linux/module.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/pm_runtime.h>
	24	#include <linux/slab.h>
	25	#include <linux/types.h>
250539a3	26	#include <linux/version.h>
babde1c2 SN	27
	28	#include <media/media-device.h>
	29	#include <media/v4l2-ctrls.h>
	30	#include <media/v4l2-ioctl.h>
c139990e	31	#include <media/videobuf2-v4l2.h>
babde1c2 SN	32	#include <media/videobuf2-dma-contig.h>
	33
	34	#include "camif-core.h"
	35
	36	static char *camif_clocks[CLK_MAX_NUM] = {
	37	/* HCLK CAMIF clock */
	38	[CLK_GATE] = "camif",
	39	/* CAMIF / external camera sensor master clock */
	40	[CLK_CAM] = "camera",
	41	};
	42
	43	static const struct camif_fmt camif_formats[] = {
	44	{
	45	.name = "YUV 4:2:2 planar, Y/Cb/Cr",
	46	.fourcc = V4L2_PIX_FMT_YUV422P,
	47	.depth = 16,
	48	.ybpp = 1,
	49	.color = IMG_FMT_YCBCR422P,
	50	.colplanes = 3,
	51	.flags = FMT_FL_S3C24XX_CODEC \|
	52	FMT_FL_S3C64XX,
	53	}, {
	54	.name = "YUV 4:2:0 planar, Y/Cb/Cr",
	55	.fourcc = V4L2_PIX_FMT_YUV420,
	56	.depth = 12,
	57	.ybpp = 1,
	58	.color = IMG_FMT_YCBCR420,
	59	.colplanes = 3,
	60	.flags = FMT_FL_S3C24XX_CODEC \|
	61	FMT_FL_S3C64XX,
	62	}, {
	63	.name = "YVU 4:2:0 planar, Y/Cr/Cb",
	64	.fourcc = V4L2_PIX_FMT_YVU420,
	65	.depth = 12,
	66	.ybpp = 1,
	67	.color = IMG_FMT_YCRCB420,
	68	.colplanes = 3,
	69	.flags = FMT_FL_S3C24XX_CODEC \|
	70	FMT_FL_S3C64XX,
	71	}, {
	72	.name = "RGB565, 16 bpp",
	73	.fourcc = V4L2_PIX_FMT_RGB565X,
	74	.depth = 16,
	75	.ybpp = 2,
	76	.color = IMG_FMT_RGB565,
	77	.colplanes = 1,
	78	.flags = FMT_FL_S3C24XX_PREVIEW \|
	79	FMT_FL_S3C64XX,
	80	}, {
	81	.name = "XRGB8888, 32 bpp",
	82	.fourcc = V4L2_PIX_FMT_RGB32,
	83	.depth = 32,
	84	.ybpp = 4,
	85	.color = IMG_FMT_XRGB8888,
	86	.colplanes = 1,
	87	.flags = FMT_FL_S3C24XX_PREVIEW \|
	88	FMT_FL_S3C64XX,
	89	}, {
	90	.name = "BGR666",
	91	.fourcc = V4L2_PIX_FMT_BGR666,
	92	.depth = 32,
	93	.ybpp = 4,
	94	.color = IMG_FMT_RGB666,
	95	.colplanes = 1,
96	.flags = FMT_FL_S3C64XX,
97	}
98	};
99
100	/**
101	* s3c_camif_find_format() - lookup camif color format by fourcc or an index
fa787125	102	* @vp: video path (DMA) description (codec/preview)
babde1c2 SN	103	* @pixelformat: fourcc to match, ignored if null
	104	* @index: index to the camif_formats array, ignored if negative
	105	*/
	106	const struct camif_fmt s3c_camif_find_format(struct camif_vp vp,
	107	const u32 *pixelformat,
	108	int index)
	109	{
	110	const struct camif_fmt fmt, def_fmt = NULL;
	111	unsigned int i;
	112	int id = 0;
	113
	114	if (index >= (int)ARRAY_SIZE(camif_formats))
	115	return NULL;
	116
	117	for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
	118	fmt = &camif_formats[i];
	119	if (vp && !(vp->fmt_flags & fmt->flags))
	120	continue;
	121	if (pixelformat && fmt->fourcc == *pixelformat)
	122	return fmt;
	123	if (index == id)
	124	def_fmt = fmt;
	125	id++;
	126	}
	127	return def_fmt;
	128	}
	129
	130	static int camif_get_scaler_factor(u32 src, u32 tar, u32 ratio, u32 shift)
	131	{
	132	unsigned int sh = 6;
	133
	134	if (src >= 64 * tar)
	135	return -EINVAL;
	136
	137	while (sh--) {
	138	unsigned int tmp = 1 << sh;
	139	if (src >= tar * tmp) {
	140	shift = sh, ratio = tmp;
	141	return 0;
	142	}
	143	}
	144	shift = 0, ratio = 1;
	145	return 0;
	146	}
	147
	148	int s3c_camif_get_scaler_config(struct camif_vp *vp,
	149	struct camif_scaler *scaler)
	150	{
	151	struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
	152	int source_x = camif_crop->width;
	153	int source_y = camif_crop->height;
	154	int target_x = vp->out_frame.rect.width;
	155	int target_y = vp->out_frame.rect.height;
	156	int ret;
	157
	158	if (vp->rotation == 90 \|\| vp->rotation == 270)
	159	swap(target_x, target_y);
	160
	161	ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
	162	&scaler->h_shift);
	163	if (ret < 0)
	164	return ret;
	165
	166	ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
167	&scaler->v_shift);
168	if (ret < 0)
169	return ret;
170
171	scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
172	scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
173
174	scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
175	scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
176
177	scaler->scaleup_h = (target_x >= source_x);
178	scaler->scaleup_v = (target_y >= source_y);
179
180	scaler->copy = 0;
181
182	pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
183	scaler->pre_h_ratio, scaler->h_shift,
184	scaler->pre_v_ratio, scaler->v_shift);
185
186	pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
187	source_x, source_y, target_x, target_y,
188	scaler->scaleup_h, scaler->scaleup_v);
189
190	return 0;
191	}
192
193	static int camif_register_sensor(struct camif_dev *camif)
194	{
195	struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
196	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
197	struct i2c_adapter *adapter;
198	struct v4l2_subdev_format format;
199	struct v4l2_subdev *sd;
200	int ret;
201
202	camif->sensor.sd = NULL;
203
204	if (sensor->i2c_board_info.addr == 0)
205	return -EINVAL;
206
207	adapter = i2c_get_adapter(sensor->i2c_bus_num);
208	if (adapter == NULL) {
209	v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
210	sensor->i2c_bus_num);
211	return -EPROBE_DEFER;
212	}
213
214	sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
215	&sensor->i2c_board_info, NULL);
216	if (sd == NULL) {
217	i2c_put_adapter(adapter);
218	v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
219	sensor->i2c_board_info.type);
220	return -EPROBE_DEFER;
221	}
222	camif->sensor.sd = sd;
223
224	v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
225
226	/* Get initial pixel format and set it at the camif sink pad */
227	format.pad = 0;
228	format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
229	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
230
231	if (ret < 0)
232	return 0;
233
234	format.pad = CAMIF_SD_PAD_SINK;
235	v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
236
237	v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
238	format.format.width, format.format.height,
239	format.format.code);
240	return 0;
241	}
242
243	static void camif_unregister_sensor(struct camif_dev *camif)
244	{
245	struct v4l2_subdev *sd = camif->sensor.sd;
246	struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
247	struct i2c_adapter *adapter;
248
249	if (client == NULL)
250	return;
251
252	adapter = client->adapter;
253	v4l2_device_unregister_subdev(sd);
254	camif->sensor.sd = NULL;
255	i2c_unregister_device(client);
332b295d	256	i2c_put_adapter(adapter);
babde1c2 SN	257	}
	258
	259	static int camif_create_media_links(struct camif_dev *camif)
	260	{
	261	int i, ret;
	262
8df00a15	263	ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
babde1c2 SN	264	&camif->subdev.entity, CAMIF_SD_PAD_SINK,
	265	MEDIA_LNK_FL_IMMUTABLE \|
	266	MEDIA_LNK_FL_ENABLED);
	267	if (ret)
	268	return ret;
	269
	270	for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
8df00a15	271	ret = media_create_pad_link(&camif->subdev.entity, i,
babde1c2 SN	272	&camif->vp[i - 1].vdev.entity, 0,
	273	MEDIA_LNK_FL_IMMUTABLE \|
	274	MEDIA_LNK_FL_ENABLED);
	275	}
	276
	277	return ret;
	278	}
	279
	280	static int camif_register_video_nodes(struct camif_dev *camif)
	281	{
	282	int ret = s3c_camif_register_video_node(camif, VP_CODEC);
	283	if (ret < 0)
	284	return ret;
	285
	286	return s3c_camif_register_video_node(camif, VP_PREVIEW);
	287	}
	288
	289	static void camif_unregister_video_nodes(struct camif_dev *camif)
	290	{
	291	s3c_camif_unregister_video_node(camif, VP_CODEC);
	292	s3c_camif_unregister_video_node(camif, VP_PREVIEW);
	293	}
	294
	295	static void camif_unregister_media_entities(struct camif_dev *camif)
	296	{
	297	camif_unregister_video_nodes(camif);
	298	camif_unregister_sensor(camif);
	299	s3c_camif_unregister_subdev(camif);
	300	}
	301
	302	/*
	303	* Media device
	304	*/
9832e155	305	static int camif_media_dev_init(struct camif_dev *camif)
babde1c2 SN	306	{
	307	struct media_device *md = &camif->media_dev;
	308	struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
	309	unsigned int ip_rev = camif->variant->ip_revision;
	310	int ret;
	311
	312	memset(md, 0, sizeof(*md));
	313	snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
	314	ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
c0decac1	315	strscpy(md->bus_info, "platform", sizeof(md->bus_info));
babde1c2	316	md->hw_revision = ip_rev;
babde1c2 SN	317
	318	md->dev = camif->dev;
	319
c0decac1	320	strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
babde1c2 SN	321	v4l2_dev->mdev = md;
babde1c2 SN	322
2e7508e4 MCC	323	media_device_init(md);
2e7508e4 MCC	324
babde1c2 SN	325	ret = v4l2_device_register(camif->dev, v4l2_dev);
	326	if (ret < 0)
	327	return ret;
	328
babde1c2 SN	329	return ret;
	330	}
	331
	332	static void camif_clk_put(struct camif_dev *camif)
	333	{
	334	int i;
	335
	336	for (i = 0; i < CLK_MAX_NUM; i++) {
d46a5a68	337	if (IS_ERR(camif->clock[i]))
babde1c2 SN	338	continue;
	339	clk_unprepare(camif->clock[i]);
	340	clk_put(camif->clock[i]);
d46a5a68	341	camif->clock[i] = ERR_PTR(-EINVAL);
babde1c2 SN	342	}
	343	}
	344
	345	static int camif_clk_get(struct camif_dev *camif)
	346	{
	347	int ret, i;
	348
d46a5a68 SK	349	for (i = 1; i < CLK_MAX_NUM; i++)
	350	camif->clock[i] = ERR_PTR(-EINVAL);
	351
babde1c2 SN	352	for (i = 0; i < CLK_MAX_NUM; i++) {
	353	camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
	354	if (IS_ERR(camif->clock[i])) {
	355	ret = PTR_ERR(camif->clock[i]);
	356	goto err;
	357	}
	358	ret = clk_prepare(camif->clock[i]);
	359	if (ret < 0) {
	360	clk_put(camif->clock[i]);
	361	camif->clock[i] = NULL;
	362	goto err;
	363	}
	364	}
	365	return 0;
	366	err:
	367	camif_clk_put(camif);
	368	dev_err(camif->dev, "failed to get clock: %s\n",
	369	camif_clocks[i]);
	370	return ret;
	371	}
	372
	373	/*
	374	* The CAMIF device has two relatively independent data processing paths
	375	* that can source data from memory or the common camera input frontend.
	376	* Register interrupts for each data processing path (camif_vp).
	377	*/
	378	static int camif_request_irqs(struct platform_device *pdev,
	379	struct camif_dev *camif)
	380	{
	381	int irq, ret, i;
	382
	383	for (i = 0; i < CAMIF_VP_NUM; i++) {
	384	struct camif_vp *vp = &camif->vp[i];
	385
	386	init_waitqueue_head(&vp->irq_queue);
	387
	388	irq = platform_get_irq(pdev, i);
	389	if (irq <= 0) {
	390	dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
	391	return -ENXIO;
	392	}
	393
	394	ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
	395	0, dev_name(&pdev->dev), vp);
	396	if (ret < 0) {
	397	dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
	398	break;
	399	}
	400	}
	401
	402	return ret;
	403	}
	404
	405	static int s3c_camif_probe(struct platform_device *pdev)
	406	{
	407	struct device *dev = &pdev->dev;
	408	struct s3c_camif_plat_data *pdata = dev->platform_data;
	409	struct s3c_camif_drvdata *drvdata;
	410	struct camif_dev *camif;
	411	struct resource *mres;
	412	int ret = 0;
	413
	414	camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
	415	if (!camif)
416	return -ENOMEM;
417
418	spin_lock_init(&camif->slock);
419	mutex_init(&camif->lock);
420
421	camif->dev = dev;
422
423	if (!pdata \|\| !pdata->gpio_get \|\| !pdata->gpio_put) {
424	dev_err(dev, "wrong platform data\n");
425	return -EINVAL;
426	}
427
428	camif->pdata = *pdata;
429	drvdata = (void *)platform_get_device_id(pdev)->driver_data;
430	camif->variant = drvdata->variant;
431
432	mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
433
f23999ec TR	434	camif->io_base = devm_ioremap_resource(dev, mres);
	435	if (IS_ERR(camif->io_base))
	436	return PTR_ERR(camif->io_base);
babde1c2 SN	437
	438	ret = camif_request_irqs(pdev, camif);
	439	if (ret < 0)
	440	return ret;
	441
	442	ret = pdata->gpio_get();
	443	if (ret < 0)
	444	return ret;
	445
	446	ret = s3c_camif_create_subdev(camif);
	447	if (ret < 0)
	448	goto err_sd;
	449
	450	ret = camif_clk_get(camif);
	451	if (ret < 0)
	452	goto err_clk;
	453
	454	platform_set_drvdata(pdev, camif);
	455	clk_set_rate(camif->clock[CLK_CAM],
	456	camif->pdata.sensor.clock_frequency);
	457
	458	dev_info(dev, "sensor clock frequency: %lu\n",
	459	clk_get_rate(camif->clock[CLK_CAM]));
	460	/*
	461	* Set initial pixel format, resolution and crop rectangle.
	462	* Must be done before a sensor subdev is registered as some
	463	* settings are overrode with values from sensor subdev.
	464	*/
	465	s3c_camif_set_defaults(camif);
	466
	467	pm_runtime_enable(dev);
	468
	469	ret = pm_runtime_get_sync(dev);
	470	if (ret < 0)
	471	goto err_pm;
	472
9832e155	473	ret = camif_media_dev_init(camif);
babde1c2	474	if (ret < 0)
c781e4a5	475	goto err_alloc;
babde1c2 SN	476
	477	ret = camif_register_sensor(camif);
	478	if (ret < 0)
	479	goto err_sens;
	480
	481	ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
	482	if (ret < 0)
	483	goto err_sens;
	484
babde1c2 SN	485	ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
babde1c2 SN	486	if (ret < 0)
9b15dfe0	487	goto err_sens;
babde1c2 SN	488
	489	ret = camif_register_video_nodes(camif);
	490	if (ret < 0)
9b15dfe0	491	goto err_sens;
babde1c2 SN	492
	493	ret = camif_create_media_links(camif);
	494	if (ret < 0)
9b15dfe0	495	goto err_sens;
9832e155 JMC	496
	497	ret = media_device_register(&camif->media_dev);
	498	if (ret < 0)
	499	goto err_sens;
	500
babde1c2 SN	501	pm_runtime_put(dev);
	502	return 0;
	503
babde1c2 SN	504	err_sens:
	505	v4l2_device_unregister(&camif->v4l2_dev);
	506	media_device_unregister(&camif->media_dev);
9832e155	507	media_device_cleanup(&camif->media_dev);
babde1c2	508	camif_unregister_media_entities(camif);
babde1c2 SN	509	err_alloc:
	510	pm_runtime_put(dev);
	511	pm_runtime_disable(dev);
	512	err_pm:
	513	camif_clk_put(camif);
	514	err_clk:
	515	s3c_camif_unregister_subdev(camif);
	516	err_sd:
	517	pdata->gpio_put();
	518	return ret;
	519	}
	520
4c62e976	521	static int s3c_camif_remove(struct platform_device *pdev)
babde1c2 SN	522	{
	523	struct camif_dev *camif = platform_get_drvdata(pdev);
	524	struct s3c_camif_plat_data *pdata = &camif->pdata;
	525
	526	media_device_unregister(&camif->media_dev);
9832e155	527	media_device_cleanup(&camif->media_dev);
babde1c2 SN	528	camif_unregister_media_entities(camif);
	529	v4l2_device_unregister(&camif->v4l2_dev);
	530
	531	pm_runtime_disable(&pdev->dev);
	532	camif_clk_put(camif);
	533	pdata->gpio_put();
	534
	535	return 0;
	536	}
	537
	538	static int s3c_camif_runtime_resume(struct device *dev)
	539	{
	540	struct camif_dev *camif = dev_get_drvdata(dev);
	541
	542	clk_enable(camif->clock[CLK_GATE]);
	543	/* null op on s3c244x */
	544	clk_enable(camif->clock[CLK_CAM]);
	545	return 0;
	546	}
	547
	548	static int s3c_camif_runtime_suspend(struct device *dev)
	549	{
	550	struct camif_dev *camif = dev_get_drvdata(dev);
	551
	552	/* null op on s3c244x */
	553	clk_disable(camif->clock[CLK_CAM]);
	554
	555	clk_disable(camif->clock[CLK_GATE]);
	556	return 0;
	557	}
	558
	559	static const struct s3c_camif_variant s3c244x_camif_variant = {
	560	.vp_pix_limits = {
	561	[VP_CODEC] = {
	562	.max_out_width = 4096,
	563	.max_sc_out_width = 2048,
	564	.out_width_align = 16,
	565	.min_out_width = 16,
	566	.max_height = 4096,
	567	},
	568	[VP_PREVIEW] = {
	569	.max_out_width = 640,
	570	.max_sc_out_width = 640,
	571	.out_width_align = 16,
	572	.min_out_width = 16,
	573	.max_height = 480,
	574	}
	575	},
	576	.pix_limits = {
	577	.win_hor_offset_align = 8,
	578	},
	579	.ip_revision = S3C244X_CAMIF_IP_REV,
	580	};
	581
	582	static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
	583	.variant = &s3c244x_camif_variant,
	584	.bus_clk_freq = 24000000UL,
	585	};
	586
	587	static const struct s3c_camif_variant s3c6410_camif_variant = {
	588	.vp_pix_limits = {
	589	[VP_CODEC] = {
	590	.max_out_width = 4096,
	591	.max_sc_out_width = 2048,
592	.out_width_align = 16,
593	.min_out_width = 16,
594	.max_height = 4096,
595	},
596	[VP_PREVIEW] = {
597	.max_out_width = 4096,
598	.max_sc_out_width = 720,
599	.out_width_align = 16,
600	.min_out_width = 16,
601	.max_height = 4096,
602	}
603	},
604	.pix_limits = {
605	.win_hor_offset_align = 8,
606	},
607	.ip_revision = S3C6410_CAMIF_IP_REV,
608	.has_img_effect = 1,
609	.vp_offset = 0x20,
610	};
611
612	static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
613	.variant = &s3c6410_camif_variant,
614	.bus_clk_freq = 133000000UL,
615	};
616
ef00b7ae	617	static const struct platform_device_id s3c_camif_driver_ids[] = {
babde1c2 SN	618	{
	619	.name = "s3c2440-camif",
	620	.driver_data = (unsigned long)&s3c244x_camif_drvdata,
	621	}, {
	622	.name = "s3c6410-camif",
	623	.driver_data = (unsigned long)&s3c6410_camif_drvdata,
	624	},
	625	{ /* sentinel */ },
	626	};
	627	MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
	628
	629	static const struct dev_pm_ops s3c_camif_pm_ops = {
	630	.runtime_suspend = s3c_camif_runtime_suspend,
	631	.runtime_resume = s3c_camif_runtime_resume,
	632	};
	633
	634	static struct platform_driver s3c_camif_driver = {
	635	.probe = s3c_camif_probe,
4c62e976	636	.remove = s3c_camif_remove,
babde1c2 SN	637	.id_table = s3c_camif_driver_ids,
	638	.driver = {
	639	.name = S3C_CAMIF_DRIVER_NAME,
babde1c2 SN	640	.pm = &s3c_camif_pm_ops,
	641	}
	642	};
	643
	644	module_platform_driver(s3c_camif_driver);
	645
	646	MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
	647	MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
	648	MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
	649	MODULE_LICENSE("GPL");