[deliverable/linux.git] / drivers / media / platform / s5p-tv / sii9234_drv.c

/*
 * 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 <linux/platform_data/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");
	ret = regulator_enable(ctx->power);
	if (ret < 0)
		return ret;

	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 ret < 0 ? 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 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 = devm_kzalloc(&client->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx) {
		dev_err(dev, "out of memory\n");
		ret = -ENOMEM;
		goto fail;
	}
	ctx->client = client;

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

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

	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);

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

	return ret;
}

static int sii9234_remove(struct i2c_client *client)
{
	struct device *dev = &client->dev;

	pm_runtime_disable(dev);

	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",
		.pm = &sii9234_pm_ops,
	},
	.probe		= sii9234_probe,
	.remove		= sii9234_remove,
	.id_table = sii9234_id,
};

module_i2c_driver(sii9234_driver);
Commit	Line	Data
56e1df49 TS	1	/*
	2	* Samsung MHL interface driver
	3	*
	4	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	5	* Author: Tomasz Stanislawski <t.stanislaws@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
	13	#include <linux/delay.h>
	14	#include <linux/err.h>
	15	#include <linux/freezer.h>
	16	#include <linux/gpio.h>
	17	#include <linux/i2c.h>
	18	#include <linux/interrupt.h>
	19	#include <linux/irq.h>
	20	#include <linux/kthread.h>
	21	#include <linux/module.h>
	22	#include <linux/pm_runtime.h>
	23	#include <linux/regulator/machine.h>
	24	#include <linux/slab.h>
	25
eb4b0ec7	26	#include <linux/platform_data/media/sii9234.h>
56e1df49 TS	27	#include <media/v4l2-subdev.h>
	28
	29	MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@samsung.com>");
	30	MODULE_DESCRIPTION("Samsung MHL interface driver");
	31	MODULE_LICENSE("GPL");
	32
	33	struct sii9234_context {
	34	struct i2c_client *client;
	35	struct regulator *power;
	36	int gpio_n_reset;
	37	struct v4l2_subdev sd;
	38	};
	39
	40	static inline struct sii9234_context sd_to_context(struct v4l2_subdev sd)
	41	{
	42	return container_of(sd, struct sii9234_context, sd);
	43	}
	44
	45	static inline int sii9234_readb(struct i2c_client *client, int addr)
	46	{
	47	return i2c_smbus_read_byte_data(client, addr);
	48	}
	49
	50	static inline int sii9234_writeb(struct i2c_client *client, int addr, int value)
	51	{
	52	return i2c_smbus_write_byte_data(client, addr, value);
	53	}
	54
	55	static inline int sii9234_writeb_mask(struct i2c_client *client, int addr,
	56	int value, int mask)
	57	{
	58	int ret;
	59
	60	ret = i2c_smbus_read_byte_data(client, addr);
	61	if (ret < 0)
	62	return ret;
	63	ret = (ret & ~mask) \| (value & mask);
	64	return i2c_smbus_write_byte_data(client, addr, ret);
	65	}
	66
	67	static inline int sii9234_readb_idx(struct i2c_client *client, int addr)
	68	{
	69	int ret;
	70	ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
	71	if (ret < 0)
	72	return ret;
	73	ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
	74	if (ret < 0)
	75	return ret;
	76	return i2c_smbus_read_byte_data(client, 0xbe);
	77	}
	78
	79	static inline int sii9234_writeb_idx(struct i2c_client *client, int addr,
	80	int value)
	81	{
	82	int ret;
	83	ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
	84	if (ret < 0)
	85	return ret;
	86	ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
	87	if (ret < 0)
	88	return ret;
	89	ret = i2c_smbus_write_byte_data(client, 0xbe, value);
	90	return ret;
91	}
92
93	static inline int sii9234_writeb_idx_mask(struct i2c_client *client, int addr,
94	int value, int mask)
95	{
96	int ret;
97
98	ret = sii9234_readb_idx(client, addr);
99	if (ret < 0)
100	return ret;
101	ret = (ret & ~mask) \| (value & mask);
102	return sii9234_writeb_idx(client, addr, ret);
103	}
104
105	static int sii9234_reset(struct sii9234_context *ctx)
106	{
107	struct i2c_client *client = ctx->client;
108	struct device *dev = &client->dev;
109	int ret, tries;
110
111	gpio_direction_output(ctx->gpio_n_reset, 1);
112	mdelay(1);
113	gpio_direction_output(ctx->gpio_n_reset, 0);
114	mdelay(1);
115	gpio_direction_output(ctx->gpio_n_reset, 1);
116	mdelay(1);
117
118	/* going to TTPI mode */
119	ret = sii9234_writeb(client, 0xc7, 0);
120	if (ret < 0) {
121	dev_err(dev, "failed to set TTPI mode\n");
122	return ret;
123	}
124	for (tries = 0; tries < 100 ; ++tries) {
125	ret = sii9234_readb(client, 0x1b);
126	if (ret > 0)
127	break;
128	if (ret < 0) {
129	dev_err(dev, "failed to reset device\n");
130	return -EIO;
131	}
132	mdelay(1);
133	}
134	if (tries == 100) {
135	dev_err(dev, "maximal number of tries reached\n");
136	return -EIO;
137	}
138
139	return 0;
140	}
141
142	static int sii9234_verify_version(struct i2c_client *client)
143	{
144	struct device *dev = &client->dev;
145	int family, rev, tpi_rev, dev_id, sub_id, hdcp, id;
146
147	family = sii9234_readb(client, 0x1b);
148	rev = sii9234_readb(client, 0x1c) & 0x0f;
149	tpi_rev = sii9234_readb(client, 0x1d) & 0x7f;
150	dev_id = sii9234_readb_idx(client, 0x0103);
151	sub_id = sii9234_readb_idx(client, 0x0102);
152	hdcp = sii9234_readb(client, 0x30);
153
154	if (family < 0 \|\| rev < 0 \|\| tpi_rev < 0 \|\| dev_id < 0 \|\|
155	sub_id < 0 \|\| hdcp < 0) {
156	dev_err(dev, "failed to read chip's version\n");
157	return -EIO;
158	}
159
160	id = (dev_id << 8) \| sub_id;
161
162	dev_info(dev, "chip: SiL%02x family: %02x, rev: %02x\n",
163	id, family, rev);
164	dev_info(dev, "tpi_rev:%02x, hdcp: %02x\n", tpi_rev, hdcp);
165	if (id != 0x9234) {
166	dev_err(dev, "not supported chip\n");
167	return -ENODEV;
168	}
169
170	return 0;
171	}
172
173	static u8 data[][3] = {
174	/* setup from driver created by doonsoo45.kim */
175	{ 0x01, 0x05, 0x04 }, /* Enable Auto soft reset on SCDT = 0 */
176	{ 0x01, 0x08, 0x35 }, /* Power Up TMDS Tx Core */
177	{ 0x01, 0x0d, 0x1c }, /* HDMI Transcode mode enable */
178	{ 0x01, 0x2b, 0x01 }, /* Enable HDCP Compliance workaround */
179	{ 0x01, 0x79, 0x40 }, /* daniel test...MHL_INT */
180	{ 0x01, 0x80, 0x34 }, /* Enable Rx PLL Clock Value */
181	{ 0x01, 0x90, 0x27 }, /* Enable CBUS discovery */
182	{ 0x01, 0x91, 0xe5 }, /* Skip RGND detection */
183	{ 0x01, 0x92, 0x46 }, /* Force MHD mode */
184	{ 0x01, 0x93, 0xdc }, /* Disable CBUS pull-up during RGND measurement */
185	{ 0x01, 0x94, 0x66 }, /* 1.8V CBUS VTH & GND threshold */
186	{ 0x01, 0x95, 0x31 }, /* RGND block & single discovery attempt */
187	{ 0x01, 0x96, 0x22 }, /* use 1K and 2K setting */
188	{ 0x01, 0xa0, 0x10 }, /* SIMG: Term mode */
189	{ 0x01, 0xa1, 0xfc }, /* Disable internal Mobile HD driver */
190	{ 0x01, 0xa3, 0xfa }, /* SIMG: Output Swing default EB, 3x Clk Mult */
191	{ 0x01, 0xa5, 0x80 }, /* SIMG: RGND Hysterisis, 3x mode for Beast */
192	{ 0x01, 0xa6, 0x0c }, /* SIMG: Swing Offset */
193	{ 0x02, 0x3d, 0x3f }, /* Power up CVCC 1.2V core */
194	{ 0x03, 0x00, 0x00 }, /* SIMG: correcting HW default */
195	{ 0x03, 0x11, 0x01 }, /* Enable TxPLL Clock */
196	{ 0x03, 0x12, 0x15 }, /* Enable Tx Clock Path & Equalizer */
197	{ 0x03, 0x13, 0x60 }, /* SIMG: Set termination value */
198	{ 0x03, 0x14, 0xf0 }, /* SIMG: Change CKDT level */
199	{ 0x03, 0x17, 0x07 }, /* SIMG: PLL Calrefsel */
200	{ 0x03, 0x1a, 0x20 }, /* VCO Cal */
201	{ 0x03, 0x22, 0xe0 }, /* SIMG: Auto EQ */
202	{ 0x03, 0x23, 0xc0 }, /* SIMG: Auto EQ */
203	{ 0x03, 0x24, 0xa0 }, /* SIMG: Auto EQ */
204	{ 0x03, 0x25, 0x80 }, /* SIMG: Auto EQ */
205	{ 0x03, 0x26, 0x60 }, /* SIMG: Auto EQ */
206	{ 0x03, 0x27, 0x40 }, /* SIMG: Auto EQ */
207	{ 0x03, 0x28, 0x20 }, /* SIMG: Auto EQ */
208	{ 0x03, 0x29, 0x00 }, /* SIMG: Auto EQ */
209	{ 0x03, 0x31, 0x0b }, /* SIMG: Rx PLL BW value from I2C BW ~ 4MHz */
210	{ 0x03, 0x45, 0x06 }, /* SIMG: DPLL Mode */
211	{ 0x03, 0x4b, 0x06 }, /* SIMG: Correcting HW default */
212	{ 0x03, 0x4c, 0xa0 }, /* Manual zone control */
213	{ 0x03, 0x4d, 0x02 }, /* SIMG: PLL Mode Value (order is important) */
214	};
215
216	static int sii9234_set_internal(struct sii9234_context *ctx)
217	{
218	struct i2c_client *client = ctx->client;
219	int i, ret;
220
221	for (i = 0; i < ARRAY_SIZE(data); ++i) {
222	int addr = (data[i][0] << 8) \| data[i][1];
223	ret = sii9234_writeb_idx(client, addr, data[i][2]);
224	if (ret < 0)
225	return ret;
226	}
227	return 0;
228	}
229
230	static int sii9234_runtime_suspend(struct device *dev)
231	{
232	struct v4l2_subdev *sd = dev_get_drvdata(dev);
233	struct sii9234_context *ctx = sd_to_context(sd);
234	struct i2c_client *client = ctx->client;
235
236	dev_info(dev, "suspend start\n");
237
238	sii9234_writeb_mask(client, 0x1e, 3, 3);
239	regulator_disable(ctx->power);
240
241	return 0;
242	}
243
244	static int sii9234_runtime_resume(struct device *dev)
245	{
246	struct v4l2_subdev *sd = dev_get_drvdata(dev);
247	struct sii9234_context *ctx = sd_to_context(sd);
248	struct i2c_client *client = ctx->client;
249	int ret;
250
251	dev_info(dev, "resume start\n");
984b248f SN	252	ret = regulator_enable(ctx->power);
	253	if (ret < 0)
	254	return ret;
56e1df49 TS	255
	256	ret = sii9234_reset(ctx);
	257	if (ret)
	258	goto fail;
	259
	260	/* enable tpi */
	261	ret = sii9234_writeb_mask(client, 0x1e, 1, 0);
	262	if (ret < 0)
	263	goto fail;
	264	ret = sii9234_set_internal(ctx);
	265	if (ret < 0)
	266	goto fail;
	267
	268	return 0;
	269
	270	fail:
	271	dev_err(dev, "failed to resume\n");
	272	regulator_disable(ctx->power);
	273
	274	return ret;
	275	}
	276
	277	static const struct dev_pm_ops sii9234_pm_ops = {
	278	.runtime_suspend = sii9234_runtime_suspend,
	279	.runtime_resume = sii9234_runtime_resume,
	280	};
	281
	282	static int sii9234_s_power(struct v4l2_subdev *sd, int on)
	283	{
	284	struct sii9234_context *ctx = sd_to_context(sd);
	285	int ret;
	286
	287	if (on)
	288	ret = pm_runtime_get_sync(&ctx->client->dev);
	289	else
	290	ret = pm_runtime_put(&ctx->client->dev);
	291	/* only values < 0 indicate errors */
d8e8b40c	292	return ret < 0 ? ret : 0;
56e1df49 TS	293	}
	294
	295	static int sii9234_s_stream(struct v4l2_subdev *sd, int enable)
	296	{
	297	struct sii9234_context *ctx = sd_to_context(sd);
	298
	299	/* (dis/en)able TDMS output */
	300	sii9234_writeb_mask(ctx->client, 0x1a, enable ? 0 : ~0 , 1 << 4);
	301	return 0;
	302	}
	303
	304	static const struct v4l2_subdev_core_ops sii9234_core_ops = {
	305	.s_power = sii9234_s_power,
	306	};
	307
	308	static const struct v4l2_subdev_video_ops sii9234_video_ops = {
	309	.s_stream = sii9234_s_stream,
	310	};
	311
	312	static const struct v4l2_subdev_ops sii9234_ops = {
	313	.core = &sii9234_core_ops,
	314	.video = &sii9234_video_ops,
	315	};
	316
4c62e976 GKH	317	static int sii9234_probe(struct i2c_client *client,
4c62e976 GKH	318	const struct i2c_device_id *id)
56e1df49 TS	319	{
	320	struct device *dev = &client->dev;
	321	struct sii9234_platform_data *pdata = dev->platform_data;
	322	struct sii9234_context *ctx;
	323	int ret;
	324
89e47e35	325	ctx = devm_kzalloc(&client->dev, sizeof(*ctx), GFP_KERNEL);
56e1df49 TS	326	if (!ctx) {
	327	dev_err(dev, "out of memory\n");
	328	ret = -ENOMEM;
	329	goto fail;
	330	}
	331	ctx->client = client;
	332
89e47e35	333	ctx->power = devm_regulator_get(dev, "hdmi-en");
56e1df49 TS	334	if (IS_ERR(ctx->power)) {
56e1df49 TS	335	dev_err(dev, "failed to acquire regulator hdmi-en\n");
89e47e35	336	return PTR_ERR(ctx->power);
56e1df49 TS	337	}
	338
	339	ctx->gpio_n_reset = pdata->gpio_n_reset;
899a179d	340	ret = devm_gpio_request(dev, ctx->gpio_n_reset, "MHL_RST");
56e1df49 TS	341	if (ret) {
56e1df49 TS	342	dev_err(dev, "failed to acquire MHL_RST gpio\n");
89e47e35	343	return ret;
56e1df49 TS	344	}
	345
	346	v4l2_i2c_subdev_init(&ctx->sd, client, &sii9234_ops);
	347
	348	pm_runtime_enable(dev);
	349
	350	/* enable device */
	351	ret = pm_runtime_get_sync(dev);
	352	if (ret)
	353	goto fail_pm;
	354
	355	/* verify chip version */
	356	ret = sii9234_verify_version(client);
	357	if (ret)
	358	goto fail_pm_get;
	359
	360	/* stop processing */
	361	pm_runtime_put(dev);
	362
	363	dev_info(dev, "probe successful\n");
	364
	365	return 0;
	366
	367	fail_pm_get:
	368	pm_runtime_put_sync(dev);
	369
	370	fail_pm:
	371	pm_runtime_disable(dev);
56e1df49	372
56e1df49 TS	373	fail:
	374	dev_err(dev, "probe failed\n");
	375
	376	return ret;
	377	}
	378
4c62e976	379	static int sii9234_remove(struct i2c_client *client)
56e1df49 TS	380	{
56e1df49 TS	381	struct device *dev = &client->dev;
56e1df49 TS	382
56e1df49 TS	383	pm_runtime_disable(dev);
56e1df49 TS	384
	385	dev_info(dev, "remove successful\n");
	386
	387	return 0;
	388	}
	389
	390
	391	static const struct i2c_device_id sii9234_id[] = {
	392	{ "SII9234", 0 },
	393	{ },
	394	};
	395
	396	MODULE_DEVICE_TABLE(i2c, sii9234_id);
	397	static struct i2c_driver sii9234_driver = {
	398	.driver = {
	399	.name = "sii9234",
56e1df49 TS	400	.pm = &sii9234_pm_ops,
	401	},
	402	.probe = sii9234_probe,
4c62e976	403	.remove = sii9234_remove,
56e1df49 TS	404	.id_table = sii9234_id,
	405	};
	406
02a890d6	407	module_i2c_driver(sii9234_driver);