[media] V4L: Add driver for S3C24XX/S3C64XX SoC series camera interface (babde1c2) · Commits · 戴 / test

drivers/media/platform/Kconfig

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Original line number	Diff line number	Diff line
		@@ -109,6 +109,18 @@ config VIDEO_OMAP3_DEBUG
		---help---
		Enable debug messages on OMAP 3 camera controller driver.

		config VIDEO_S3C_CAMIF
		tristate "Samsung S3C24XX/S3C64XX SoC Camera Interface driver"
		depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
		depends on (PLAT_S3C64XX \|\| PLAT_S3C24XX) && PM_RUNTIME
		select VIDEOBUF2_DMA_CONTIG
		---help---
		This is a v4l2 driver for s3c24xx and s3c64xx SoC series camera
		host interface (CAMIF).

		To compile this driver as a module, choose M here: the module
		will be called s3c-camif.

		source "drivers/media/platform/soc_camera/Kconfig"
		source "drivers/media/platform/s5p-fimc/Kconfig"
		source "drivers/media/platform/s5p-tv/Kconfig"

drivers/media/platform/Makefile

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Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ obj-$(CONFIG_VIDEO_CODA) += coda.o

		obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o

		obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif/
		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/
		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/

drivers/media/platform/s3c-camif/Makefile

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Original line number	Diff line number	Diff line
		# Makefile for s3c244x/s3c64xx CAMIF driver

		s3c-camif-objs := camif-core.o camif-capture.o camif-regs.o

		obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif.o

drivers/media/platform/s3c-camif/camif-capture.c

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File added.

Preview size limit exceeded, changes collapsed.

drivers/media/platform/s3c-camif/camif-core.c

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		/*
		* 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 <media/media-device.h>
		#include <media/v4l2-ctrls.h>
		#include <media/v4l2-ioctl.h>
		#include <media/videobuf2-core.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);
		if (adapter)
		i2c_put_adapter(adapter);
		}

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

		ret = media_entity_create_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_entity_create_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_register(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;

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

		ret = media_device_register(md);
		if (ret < 0)
		v4l2_device_unregister(v4l2_dev);

		return ret;
		}

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

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

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

		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_request_and_ioremap(dev, mres);
		if (!camif->io_base) {
		dev_err(dev, "failed to obtain I/O memory\n");
		return -ENOENT;
		}

		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_register(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;

		mutex_lock(&camif->media_dev.graph_mutex);

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

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

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

		mutex_unlock(&camif->media_dev.graph_mutex);
		pm_runtime_put(dev);
		return 0;

		err_unlock:
		mutex_unlock(&camif->media_dev.graph_mutex);
		err_sens:
		v4l2_device_unregister(&camif->v4l2_dev);
		media_device_unregister(&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 __devexit 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);
		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 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 = __devexit_p(s3c_camif_remove),
		.id_table = s3c_camif_driver_ids,
		.driver = {
		.name = S3C_CAMIF_DRIVER_NAME,
		.owner = THIS_MODULE,
		.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");

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