[media] v4l: s5p-tv: add sii9234 driver (56e1df49) · Commits · e / devices / android_kernel_teracube_emerald

drivers/media/video/s5p-tv/Kconfig

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	@@ -46,6 +46,16 @@ config VIDEO_SAMSUNG_S5P_HDMIPHY
	as module. It is an I2C driver, that exposes a V4L2		as module. It is an I2C driver, that exposes a V4L2
	subdev for use by other drivers.		subdev for use by other drivers.

			config VIDEO_SAMSUNG_S5P_SII9234
			tristate "Samsung SII9234 Driver"
			depends on VIDEO_DEV && VIDEO_V4L2 && I2C
			depends on VIDEO_SAMSUNG_S5P_TV
			help
			Say Y here if you want support for the MHL interface
			in S5P Samsung SoC. The driver can be compiled
			as module. It is an I2C driver, that exposes a V4L2
			subdev for use by other drivers.

	config VIDEO_SAMSUNG_S5P_SDO		config VIDEO_SAMSUNG_S5P_SDO
	tristate "Samsung Analog TV Driver"		tristate "Samsung Analog TV Driver"
	depends on VIDEO_DEV && VIDEO_V4L2		depends on VIDEO_DEV && VIDEO_V4L2

drivers/media/video/s5p-tv/Makefile

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	@@ -8,6 +8,8 @@

	obj-$(CONFIG_VIDEO_SAMSUNG_S5P_HDMIPHY) += s5p-hdmiphy.o		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_HDMIPHY) += s5p-hdmiphy.o
	s5p-hdmiphy-y += hdmiphy_drv.o		s5p-hdmiphy-y += hdmiphy_drv.o
			obj-$(CONFIG_VIDEO_SAMSUNG_S5P_SII9234) += s5p-sii9234.o
			s5p-sii9234-y += sii9234_drv.o
	obj-$(CONFIG_VIDEO_SAMSUNG_S5P_HDMI) += s5p-hdmi.o		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_HDMI) += s5p-hdmi.o
	s5p-hdmi-y += hdmi_drv.o		s5p-hdmi-y += hdmi_drv.o
	obj-$(CONFIG_VIDEO_SAMSUNG_S5P_SDO) += s5p-sdo.o		obj-$(CONFIG_VIDEO_SAMSUNG_S5P_SDO) += s5p-sdo.o

drivers/media/video/s5p-tv/sii9234_drv.c

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			/*
			* Samsung MHL interface driver
			*
			* Copyright (C) 2011 Samsung Electronics Co.Ltd
			* Author: Tomasz Stanislawski <t.stanislaws@samsung.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.
			*/

			#include <linux/delay.h>
			#include <linux/err.h>
			#include <linux/freezer.h>
			#include <linux/gpio.h>
			#include <linux/i2c.h>
			#include <linux/interrupt.h>
			#include <linux/irq.h>
			#include <linux/kthread.h>
			#include <linux/module.h>
			#include <linux/pm_runtime.h>
			#include <linux/regulator/machine.h>
			#include <linux/slab.h>

			#include <mach/gpio.h>
			#include <plat/gpio-cfg.h>

			#include <media/sii9234.h>
			#include <media/v4l2-subdev.h>

			MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@samsung.com>");
			MODULE_DESCRIPTION("Samsung MHL interface driver");
			MODULE_LICENSE("GPL");

			struct sii9234_context {
			struct i2c_client *client;
			struct regulator *power;
			int gpio_n_reset;
			struct v4l2_subdev sd;
			};

			static inline struct sii9234_context sd_to_context(struct v4l2_subdev sd)
			{
			return container_of(sd, struct sii9234_context, sd);
			}

			static inline int sii9234_readb(struct i2c_client *client, int addr)
			{
			return i2c_smbus_read_byte_data(client, addr);
			}

			static inline int sii9234_writeb(struct i2c_client *client, int addr, int value)
			{
			return i2c_smbus_write_byte_data(client, addr, value);
			}

			static inline int sii9234_writeb_mask(struct i2c_client *client, int addr,
			int value, int mask)
			{
			int ret;

			ret = i2c_smbus_read_byte_data(client, addr);
			if (ret < 0)
			return ret;
			ret = (ret & ~mask) \| (value & mask);
			return i2c_smbus_write_byte_data(client, addr, ret);
			}

			static inline int sii9234_readb_idx(struct i2c_client *client, int addr)
			{
			int ret;
			ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
			if (ret < 0)
			return ret;
			ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
			if (ret < 0)
			return ret;
			return i2c_smbus_read_byte_data(client, 0xbe);
			}

			static inline int sii9234_writeb_idx(struct i2c_client *client, int addr,
			int value)
			{
			int ret;
			ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
			if (ret < 0)
			return ret;
			ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
			if (ret < 0)
			return ret;
			ret = i2c_smbus_write_byte_data(client, 0xbe, value);
			return ret;
			}

			static inline int sii9234_writeb_idx_mask(struct i2c_client *client, int addr,
			int value, int mask)
			{
			int ret;

			ret = sii9234_readb_idx(client, addr);
			if (ret < 0)
			return ret;
			ret = (ret & ~mask) \| (value & mask);
			return sii9234_writeb_idx(client, addr, ret);
			}

			static int sii9234_reset(struct sii9234_context *ctx)
			{
			struct i2c_client *client = ctx->client;
			struct device *dev = &client->dev;
			int ret, tries;

			gpio_direction_output(ctx->gpio_n_reset, 1);
			mdelay(1);
			gpio_direction_output(ctx->gpio_n_reset, 0);
			mdelay(1);
			gpio_direction_output(ctx->gpio_n_reset, 1);
			mdelay(1);

			/* going to TTPI mode */
			ret = sii9234_writeb(client, 0xc7, 0);
			if (ret < 0) {
			dev_err(dev, "failed to set TTPI mode\n");
			return ret;
			}
			for (tries = 0; tries < 100 ; ++tries) {
			ret = sii9234_readb(client, 0x1b);
			if (ret > 0)
			break;
			if (ret < 0) {
			dev_err(dev, "failed to reset device\n");
			return -EIO;
			}
			mdelay(1);
			}
			if (tries == 100) {
			dev_err(dev, "maximal number of tries reached\n");
			return -EIO;
			}

			return 0;
			}

			static int sii9234_verify_version(struct i2c_client *client)
			{
			struct device *dev = &client->dev;
			int family, rev, tpi_rev, dev_id, sub_id, hdcp, id;

			family = sii9234_readb(client, 0x1b);
			rev = sii9234_readb(client, 0x1c) & 0x0f;
			tpi_rev = sii9234_readb(client, 0x1d) & 0x7f;
			dev_id = sii9234_readb_idx(client, 0x0103);
			sub_id = sii9234_readb_idx(client, 0x0102);
			hdcp = sii9234_readb(client, 0x30);

			if (family < 0 \|\| rev < 0 \|\| tpi_rev < 0 \|\| dev_id < 0 \|\|
			sub_id < 0 \|\| hdcp < 0) {
			dev_err(dev, "failed to read chip's version\n");
			return -EIO;
			}

			id = (dev_id << 8) \| sub_id;

			dev_info(dev, "chip: SiL%02x family: %02x, rev: %02x\n",
			id, family, rev);
			dev_info(dev, "tpi_rev:%02x, hdcp: %02x\n", tpi_rev, hdcp);
			if (id != 0x9234) {
			dev_err(dev, "not supported chip\n");
			return -ENODEV;
			}

			return 0;
			}

			static u8 data[][3] = {
			/* setup from driver created by doonsoo45.kim */
			{ 0x01, 0x05, 0x04 }, /* Enable Auto soft reset on SCDT = 0 */
			{ 0x01, 0x08, 0x35 }, /* Power Up TMDS Tx Core */
			{ 0x01, 0x0d, 0x1c }, /* HDMI Transcode mode enable */
			{ 0x01, 0x2b, 0x01 }, /* Enable HDCP Compliance workaround */
			{ 0x01, 0x79, 0x40 }, /* daniel test...MHL_INT */
			{ 0x01, 0x80, 0x34 }, /* Enable Rx PLL Clock Value */
			{ 0x01, 0x90, 0x27 }, /* Enable CBUS discovery */
			{ 0x01, 0x91, 0xe5 }, /* Skip RGND detection */
			{ 0x01, 0x92, 0x46 }, /* Force MHD mode */
			{ 0x01, 0x93, 0xdc }, /* Disable CBUS pull-up during RGND measurement */
			{ 0x01, 0x94, 0x66 }, /* 1.8V CBUS VTH & GND threshold */
			{ 0x01, 0x95, 0x31 }, /* RGND block & single discovery attempt */
			{ 0x01, 0x96, 0x22 }, /* use 1K and 2K setting */
			{ 0x01, 0xa0, 0x10 }, /* SIMG: Term mode */
			{ 0x01, 0xa1, 0xfc }, /* Disable internal Mobile HD driver */
			{ 0x01, 0xa3, 0xfa }, /* SIMG: Output Swing default EB, 3x Clk Mult */
			{ 0x01, 0xa5, 0x80 }, /* SIMG: RGND Hysterisis, 3x mode for Beast */
			{ 0x01, 0xa6, 0x0c }, /* SIMG: Swing Offset */
			{ 0x02, 0x3d, 0x3f }, /* Power up CVCC 1.2V core */
			{ 0x03, 0x00, 0x00 }, /* SIMG: correcting HW default */
			{ 0x03, 0x11, 0x01 }, /* Enable TxPLL Clock */
			{ 0x03, 0x12, 0x15 }, /* Enable Tx Clock Path & Equalizer */
			{ 0x03, 0x13, 0x60 }, /* SIMG: Set termination value */
			{ 0x03, 0x14, 0xf0 }, /* SIMG: Change CKDT level */
			{ 0x03, 0x17, 0x07 }, /* SIMG: PLL Calrefsel */
			{ 0x03, 0x1a, 0x20 }, /* VCO Cal */
			{ 0x03, 0x22, 0xe0 }, /* SIMG: Auto EQ */
			{ 0x03, 0x23, 0xc0 }, /* SIMG: Auto EQ */
			{ 0x03, 0x24, 0xa0 }, /* SIMG: Auto EQ */
			{ 0x03, 0x25, 0x80 }, /* SIMG: Auto EQ */
			{ 0x03, 0x26, 0x60 }, /* SIMG: Auto EQ */
			{ 0x03, 0x27, 0x40 }, /* SIMG: Auto EQ */
			{ 0x03, 0x28, 0x20 }, /* SIMG: Auto EQ */
			{ 0x03, 0x29, 0x00 }, /* SIMG: Auto EQ */
			{ 0x03, 0x31, 0x0b }, /* SIMG: Rx PLL BW value from I2C BW ~ 4MHz */
			{ 0x03, 0x45, 0x06 }, /* SIMG: DPLL Mode */
			{ 0x03, 0x4b, 0x06 }, /* SIMG: Correcting HW default */
			{ 0x03, 0x4c, 0xa0 }, /* Manual zone control */
			{ 0x03, 0x4d, 0x02 }, /* SIMG: PLL Mode Value (order is important) */
			};

			static int sii9234_set_internal(struct sii9234_context *ctx)
			{
			struct i2c_client *client = ctx->client;
			int i, ret;

			for (i = 0; i < ARRAY_SIZE(data); ++i) {
			int addr = (data[i][0] << 8) \| data[i][1];
			ret = sii9234_writeb_idx(client, addr, data[i][2]);
			if (ret < 0)
			return ret;
			}
			return 0;
			}

			static int sii9234_runtime_suspend(struct device *dev)
			{
			struct v4l2_subdev *sd = dev_get_drvdata(dev);
			struct sii9234_context *ctx = sd_to_context(sd);
			struct i2c_client *client = ctx->client;

			dev_info(dev, "suspend start\n");

			sii9234_writeb_mask(client, 0x1e, 3, 3);
			regulator_disable(ctx->power);

			return 0;
			}

			static int sii9234_runtime_resume(struct device *dev)
			{
			struct v4l2_subdev *sd = dev_get_drvdata(dev);
			struct sii9234_context *ctx = sd_to_context(sd);
			struct i2c_client *client = ctx->client;
			int ret;

			dev_info(dev, "resume start\n");
			regulator_enable(ctx->power);

			ret = sii9234_reset(ctx);
			if (ret)
			goto fail;

			/* enable tpi */
			ret = sii9234_writeb_mask(client, 0x1e, 1, 0);
			if (ret < 0)
			goto fail;
			ret = sii9234_set_internal(ctx);
			if (ret < 0)
			goto fail;

			return 0;

			fail:
			dev_err(dev, "failed to resume\n");
			regulator_disable(ctx->power);

			return ret;
			}

			static const struct dev_pm_ops sii9234_pm_ops = {
			.runtime_suspend = sii9234_runtime_suspend,
			.runtime_resume = sii9234_runtime_resume,
			};

			static int sii9234_s_power(struct v4l2_subdev *sd, int on)
			{
			struct sii9234_context *ctx = sd_to_context(sd);
			int ret;

			if (on)
			ret = pm_runtime_get_sync(&ctx->client->dev);
			else
			ret = pm_runtime_put(&ctx->client->dev);
			/* only values < 0 indicate errors */
			return IS_ERR_VALUE(ret) ? ret : 0;
			}

			static int sii9234_s_stream(struct v4l2_subdev *sd, int enable)
			{
			struct sii9234_context *ctx = sd_to_context(sd);

			/* (dis/en)able TDMS output */
			sii9234_writeb_mask(ctx->client, 0x1a, enable ? 0 : ~0 , 1 << 4);
			return 0;
			}

			static const struct v4l2_subdev_core_ops sii9234_core_ops = {
			.s_power = sii9234_s_power,
			};

			static const struct v4l2_subdev_video_ops sii9234_video_ops = {
			.s_stream = sii9234_s_stream,
			};

			static const struct v4l2_subdev_ops sii9234_ops = {
			.core = &sii9234_core_ops,
			.video = &sii9234_video_ops,
			};

			static int __devinit sii9234_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
			{
			struct device *dev = &client->dev;
			struct sii9234_platform_data *pdata = dev->platform_data;
			struct sii9234_context *ctx;
			int ret;

			ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
			if (!ctx) {
			dev_err(dev, "out of memory\n");
			ret = -ENOMEM;
			goto fail;
			}
			ctx->client = client;

			ctx->power = regulator_get(dev, "hdmi-en");
			if (IS_ERR(ctx->power)) {
			dev_err(dev, "failed to acquire regulator hdmi-en\n");
			ret = PTR_ERR(ctx->power);
			goto fail_ctx;
			}

			ctx->gpio_n_reset = pdata->gpio_n_reset;
			ret = gpio_request(ctx->gpio_n_reset, "MHL_RST");
			if (ret) {
			dev_err(dev, "failed to acquire MHL_RST gpio\n");
			goto fail_power;
			}

			v4l2_i2c_subdev_init(&ctx->sd, client, &sii9234_ops);

			pm_runtime_enable(dev);

			/* enable device */
			ret = pm_runtime_get_sync(dev);
			if (ret)
			goto fail_pm;

			/* verify chip version */
			ret = sii9234_verify_version(client);
			if (ret)
			goto fail_pm_get;

			/* stop processing */
			pm_runtime_put(dev);

			dev_info(dev, "probe successful\n");

			return 0;

			fail_pm_get:
			pm_runtime_put_sync(dev);

			fail_pm:
			pm_runtime_disable(dev);
			gpio_free(ctx->gpio_n_reset);

			fail_power:
			regulator_put(ctx->power);

			fail_ctx:
			kfree(ctx);

			fail:
			dev_err(dev, "probe failed\n");

			return ret;
			}

			static int __devexit sii9234_remove(struct i2c_client *client)
			{
			struct device *dev = &client->dev;
			struct v4l2_subdev *sd = i2c_get_clientdata(client);
			struct sii9234_context *ctx = sd_to_context(sd);

			pm_runtime_disable(dev);
			gpio_free(ctx->gpio_n_reset);
			regulator_put(ctx->power);
			kfree(ctx);

			dev_info(dev, "remove successful\n");

			return 0;
			}


			static const struct i2c_device_id sii9234_id[] = {
			{ "SII9234", 0 },
			{ },
			};

			MODULE_DEVICE_TABLE(i2c, sii9234_id);
			static struct i2c_driver sii9234_driver = {
			.driver = {
			.name = "sii9234",
			.owner = THIS_MODULE,
			.pm = &sii9234_pm_ops,
			},
			.probe = sii9234_probe,
			.remove = __devexit_p(sii9234_remove),
			.id_table = sii9234_id,
			};

			static int __init sii9234_init(void)
			{
			return i2c_add_driver(&sii9234_driver);
			}
			module_init(sii9234_init);

			static void __exit sii9234_exit(void)
			{
			i2c_del_driver(&sii9234_driver);
			}
			module_exit(sii9234_exit);

include/media/sii9234.h

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			/*
			* Driver header for SII9234 MHL converter chip.
			*
			* Copyright (c) 2011 Samsung Electronics, Co. Ltd
			* Contact: Tomasz Stanislawski <t.stanislaws@samsung.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.
			*/

			#ifndef SII9234_H
			#define SII9234_H

			/**
			* @gpio_n_reset: GPIO driving nRESET pin
			*/

			struct sii9234_platform_data {
			int gpio_n_reset;
			};

			#endif /* SII9234_H */