[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / wm8739.c

/*
 * wm8739
 *
 * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
 *
 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
 * - Cleanup
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>

MODULE_DESCRIPTION("wm8739 driver");
MODULE_AUTHOR("T. Adachi, Hans Verkuil");
MODULE_LICENSE("GPL");

static int debug;

module_param(debug, int, 0644);

MODULE_PARM_DESC(debug, "Debug level (0-1)");


/* ------------------------------------------------------------------------ */

enum {
	R0 = 0, R1,
	R5 = 5, R6, R7, R8, R9, R15 = 15,
	TOT_REGS
};

struct wm8739_state {
	struct v4l2_subdev sd;
	u32 clock_freq;
	u8 muted;
	u16 volume;
	u16 balance;
	u8 vol_l; 		/* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	u8 vol_r; 		/* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
};

static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct wm8739_state, sd);
}

/* ------------------------------------------------------------------------ */

static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int i;

	if (reg < 0 || reg >= TOT_REGS) {
		v4l2_err(sd, "Invalid register R%d\n", reg);
		return -1;
	}

	v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);

	for (i = 0; i < 3; i++)
		if (i2c_smbus_write_byte_data(client,
				(reg << 1) | (val >> 8), val & 0xff) == 0)
			return 0;
	v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
	return -1;
}

/* write regs to set audio volume etc */
static void wm8739_set_audio(struct v4l2_subdev *sd)
{
	struct wm8739_state *state = to_state(sd);
	u16 mute = state->muted ? 0x80 : 0;

	/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
	 * Default setting: 0x17 = 0 dB
	 */
	wm8739_write(sd, R0, (state->vol_l & 0x1f) | mute);
	wm8739_write(sd, R1, (state->vol_r & 0x1f) | mute);
}

static int wm8739_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct wm8739_state *state = to_state(sd);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = state->muted;
		break;

	case V4L2_CID_AUDIO_VOLUME:
		ctrl->value = state->volume;
		break;

	case V4L2_CID_AUDIO_BALANCE:
		ctrl->value = state->balance;
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct wm8739_state *state = to_state(sd);
	unsigned int work_l, work_r;

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		state->muted = ctrl->value;
		break;

	case V4L2_CID_AUDIO_VOLUME:
		state->volume = ctrl->value;
		break;

	case V4L2_CID_AUDIO_BALANCE:
		state->balance = ctrl->value;
		break;

	default:
		return -EINVAL;
	}

	/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
	work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
	work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;

	state->vol_l = (long)work_l * 31 / 65535;
	state->vol_r = (long)work_r * 31 / 65535;

	/* set audio volume etc. */
	wm8739_set_audio(sd);
	return 0;
}

/* ------------------------------------------------------------------------ */

static struct v4l2_queryctrl wm8739_qctrl[] = {
	{
		.id            = V4L2_CID_AUDIO_VOLUME,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 58880,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}, {
		.id            = V4L2_CID_AUDIO_MUTE,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.step          = 1,
		.default_value = 1,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	}, {
		.id            = V4L2_CID_AUDIO_BALANCE,
		.name          = "Balance",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}
};

/* ------------------------------------------------------------------------ */

static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
{
	struct wm8739_state *state = to_state(sd);

	state->clock_freq = audiofreq;
	/* de-activate */
	wm8739_write(sd, R9, 0x000);
	switch (audiofreq) {
	case 44100:
		/* 256fps, fs=44.1k */
		wm8739_write(sd, R8, 0x020);
		break;
	case 48000:
		/* 256fps, fs=48k */
		wm8739_write(sd, R8, 0x000);
		break;
	case 32000:
		/* 256fps, fs=32k */
		wm8739_write(sd, R8, 0x018);
		break;
	default:
		break;
	}
	/* activate */
	wm8739_write(sd, R9, 0x001);
	return 0;
}

static int wm8739_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
		if (qc->id && qc->id == wm8739_qctrl[i].id) {
			memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
			return 0;
		}
	return -EINVAL;
}

static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
}

static int wm8739_log_status(struct v4l2_subdev *sd)
{
	struct wm8739_state *state = to_state(sd);

	v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
	v4l2_info(sd, "Volume L:  %02x%s\n", state->vol_l & 0x1f,
			state->muted ? " (muted)" : "");
	v4l2_info(sd, "Volume R:  %02x%s\n", state->vol_r & 0x1f,
			state->muted ? " (muted)" : "");
	return 0;
}

/* ----------------------------------------------------------------------- */

static const struct v4l2_subdev_core_ops wm8739_core_ops = {
	.log_status = wm8739_log_status,
	.g_chip_ident = wm8739_g_chip_ident,
	.queryctrl = wm8739_queryctrl,
	.g_ctrl = wm8739_g_ctrl,
	.s_ctrl = wm8739_s_ctrl,
};

static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
	.s_clock_freq = wm8739_s_clock_freq,
};

static const struct v4l2_subdev_ops wm8739_ops = {
	.core = &wm8739_core_ops,
	.audio = &wm8739_audio_ops,
};

/* ------------------------------------------------------------------------ */

/* i2c implementation */

static int wm8739_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct wm8739_state *state;
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	v4l_info(client, "chip found @ 0x%x (%s)\n",
			client->addr << 1, client->adapter->name);

	state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
	state->vol_l = 0x17; /* 0dB */
	state->vol_r = 0x17; /* 0dB */
	state->muted = 0;
	state->balance = 32768;
	/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
	state->volume = ((long)state->vol_l + 1) * 65535 / 31;
	state->clock_freq = 48000;

	/* Initialize wm8739 */

	/* reset */
	wm8739_write(sd, R15, 0x00);
	/* filter setting, high path, offet clear */
	wm8739_write(sd, R5, 0x000);
	/* ADC, OSC, Power Off mode Disable */
	wm8739_write(sd, R6, 0x000);
	/* Digital Audio interface format:
	   Enable Master mode, 24 bit, MSB first/left justified */
	wm8739_write(sd, R7, 0x049);
	/* sampling control: normal, 256fs, 48KHz sampling rate */
	wm8739_write(sd, R8, 0x000);
	/* activate */
	wm8739_write(sd, R9, 0x001);
	/* set volume/mute */
	wm8739_set_audio(sd);
	return 0;
}

static int wm8739_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id wm8739_id[] = {
	{ "wm8739", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8739_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "wm8739",
	.probe = wm8739_probe,
	.remove = wm8739_remove,
	.id_table = wm8739_id,
};
Commit	Line	Data
75c4570c HV	1	/*
	2	* wm8739
	3	*
	4	* Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
	5	*
	6	* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
	7	* - Cleanup
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*/
	23
	24	#include <linux/module.h>
	25	#include <linux/types.h>
5a0e3ad6	26	#include <linux/slab.h>
75c4570c HV	27	#include <linux/ioctl.h>
	28	#include <asm/uaccess.h>
	29	#include <linux/i2c.h>
	30	#include <linux/i2c-id.h>
33b687cf	31	#include <linux/videodev2.h>
f1460e97	32	#include <media/v4l2-device.h>
74cab31c	33	#include <media/v4l2-chip-ident.h>
f69d419a	34	#include <media/v4l2-i2c-drv.h>
75c4570c HV	35
	36	MODULE_DESCRIPTION("wm8739 driver");
	37	MODULE_AUTHOR("T. Adachi, Hans Verkuil");
	38	MODULE_LICENSE("GPL");
	39
099b8e73	40	static int debug;
75c4570c HV	41
	42	module_param(debug, int, 0644);
	43
	44	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	45
	46
75c4570c HV	47	/* ------------------------------------------------------------------------ */
	48
	49	enum {
	50	R0 = 0, R1,
	51	R5 = 5, R6, R7, R8, R9, R15 = 15,
	52	TOT_REGS
	53	};
	54
	55	struct wm8739_state {
f1460e97	56	struct v4l2_subdev sd;
75c4570c HV	57	u32 clock_freq;
	58	u8 muted;
	59	u16 volume;
	60	u16 balance;
	61	u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	62	u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	63	};
	64
f1460e97 HV	65	static inline struct wm8739_state to_state(struct v4l2_subdev sd)
	66	{
	67	return container_of(sd, struct wm8739_state, sd);
	68	}
	69
75c4570c HV	70	/* ------------------------------------------------------------------------ */
75c4570c HV	71
f1460e97	72	static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
75c4570c	73	{
f1460e97	74	struct i2c_client *client = v4l2_get_subdevdata(sd);
75c4570c HV	75	int i;
	76
	77	if (reg < 0 \|\| reg >= TOT_REGS) {
f1460e97	78	v4l2_err(sd, "Invalid register R%d\n", reg);
75c4570c HV	79	return -1;
	80	}
	81
f1460e97	82	v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);
75c4570c	83
099b8e73 HV	84	for (i = 0; i < 3; i++)
	85	if (i2c_smbus_write_byte_data(client,
	86	(reg << 1) \| (val >> 8), val & 0xff) == 0)
75c4570c	87	return 0;
f1460e97	88	v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
75c4570c HV	89	return -1;
	90	}
	91
	92	/* write regs to set audio volume etc */
f1460e97	93	static void wm8739_set_audio(struct v4l2_subdev *sd)
75c4570c	94	{
f1460e97	95	struct wm8739_state *state = to_state(sd);
75c4570c HV	96	u16 mute = state->muted ? 0x80 : 0;
	97
	98	/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
	99	* Default setting: 0x17 = 0 dB
	100	*/
f1460e97 HV	101	wm8739_write(sd, R0, (state->vol_l & 0x1f) \| mute);
f1460e97 HV	102	wm8739_write(sd, R1, (state->vol_r & 0x1f) \| mute);
75c4570c HV	103	}
75c4570c HV	104
f1460e97	105	static int wm8739_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
75c4570c	106	{
f1460e97	107	struct wm8739_state *state = to_state(sd);
75c4570c HV	108
	109	switch (ctrl->id) {
	110	case V4L2_CID_AUDIO_MUTE:
	111	ctrl->value = state->muted;
	112	break;
	113
	114	case V4L2_CID_AUDIO_VOLUME:
	115	ctrl->value = state->volume;
	116	break;
	117
	118	case V4L2_CID_AUDIO_BALANCE:
	119	ctrl->value = state->balance;
	120	break;
	121
	122	default:
	123	return -EINVAL;
	124	}
	125	return 0;
	126	}
	127
f1460e97	128	static int wm8739_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
75c4570c	129	{
f1460e97	130	struct wm8739_state *state = to_state(sd);
75c4570c HV	131	unsigned int work_l, work_r;
	132
	133	switch (ctrl->id) {
	134	case V4L2_CID_AUDIO_MUTE:
	135	state->muted = ctrl->value;
	136	break;
	137
	138	case V4L2_CID_AUDIO_VOLUME:
	139	state->volume = ctrl->value;
	140	break;
	141
	142	case V4L2_CID_AUDIO_BALANCE:
	143	state->balance = ctrl->value;
	144	break;
	145
	146	default:
	147	return -EINVAL;
	148	}
	149
	150	/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
	151	work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
	152	work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;
	153
	154	state->vol_l = (long)work_l * 31 / 65535;
	155	state->vol_r = (long)work_r * 31 / 65535;
	156
	157	/* set audio volume etc. */
f1460e97	158	wm8739_set_audio(sd);
75c4570c HV	159	return 0;
	160	}
	161
	162	/* ------------------------------------------------------------------------ */
	163
	164	static struct v4l2_queryctrl wm8739_qctrl[] = {
	165	{
	166	.id = V4L2_CID_AUDIO_VOLUME,
	167	.name = "Volume",
	168	.minimum = 0,
	169	.maximum = 65535,
	170	.step = 65535/100,
	171	.default_value = 58880,
	172	.flags = 0,
	173	.type = V4L2_CTRL_TYPE_INTEGER,
099b8e73	174	}, {
75c4570c HV	175	.id = V4L2_CID_AUDIO_MUTE,
	176	.name = "Mute",
	177	.minimum = 0,
	178	.maximum = 1,
	179	.step = 1,
	180	.default_value = 1,
	181	.flags = 0,
	182	.type = V4L2_CTRL_TYPE_BOOLEAN,
099b8e73	183	}, {
75c4570c HV	184	.id = V4L2_CID_AUDIO_BALANCE,
	185	.name = "Balance",
	186	.minimum = 0,
	187	.maximum = 65535,
	188	.step = 65535/100,
	189	.default_value = 32768,
	190	.flags = 0,
	191	.type = V4L2_CTRL_TYPE_INTEGER,
	192	}
	193	};
	194
	195	/* ------------------------------------------------------------------------ */
	196
f1460e97	197	static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
75c4570c	198	{
f1460e97 HV	199	struct wm8739_state *state = to_state(sd);
	200
	201	state->clock_freq = audiofreq;
	202	/* de-activate */
	203	wm8739_write(sd, R9, 0x000);
	204	switch (audiofreq) {
	205	case 44100:
	206	/* 256fps, fs=44.1k */
	207	wm8739_write(sd, R8, 0x020);
	208	break;
	209	case 48000:
	210	/* 256fps, fs=48k */
	211	wm8739_write(sd, R8, 0x000);
	212	break;
	213	case 32000:
	214	/* 256fps, fs=32k */
	215	wm8739_write(sd, R8, 0x018);
	216	break;
	217	default:
75c4570c HV	218	break;
75c4570c HV	219	}
f1460e97 HV	220	/* activate */
	221	wm8739_write(sd, R9, 0x001);
	222	return 0;
	223	}
75c4570c	224
f1460e97 HV	225	static int wm8739_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
	226	{
	227	int i;
75c4570c	228
f1460e97 HV	229	for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
	230	if (qc->id && qc->id == wm8739_qctrl[i].id) {
	231	memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
	232	return 0;
	233	}
	234	return -EINVAL;
	235	}
75c4570c	236
aecde8b5	237	static int wm8739_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
f1460e97 HV	238	{
f1460e97 HV	239	struct i2c_client *client = v4l2_get_subdevdata(sd);
74cab31c	240
f1460e97 HV	241	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
f1460e97 HV	242	}
75c4570c	243
f1460e97 HV	244	static int wm8739_log_status(struct v4l2_subdev *sd)
	245	{
	246	struct wm8739_state *state = to_state(sd);
75c4570c	247
f1460e97 HV	248	v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
	249	v4l2_info(sd, "Volume L: %02x%s\n", state->vol_l & 0x1f,
	250	state->muted ? " (muted)" : "");
	251	v4l2_info(sd, "Volume R: %02x%s\n", state->vol_r & 0x1f,
	252	state->muted ? " (muted)" : "");
75c4570c HV	253	return 0;
	254	}
	255
f1460e97 HV	256	/* ----------------------------------------------------------------------- */
	257
	258	static const struct v4l2_subdev_core_ops wm8739_core_ops = {
	259	.log_status = wm8739_log_status,
	260	.g_chip_ident = wm8739_g_chip_ident,
	261	.queryctrl = wm8739_queryctrl,
	262	.g_ctrl = wm8739_g_ctrl,
	263	.s_ctrl = wm8739_s_ctrl,
	264	};
	265
	266	static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
	267	.s_clock_freq = wm8739_s_clock_freq,
	268	};
	269
	270	static const struct v4l2_subdev_ops wm8739_ops = {
	271	.core = &wm8739_core_ops,
	272	.audio = &wm8739_audio_ops,
	273	};
	274
75c4570c HV	275	/* ------------------------------------------------------------------------ */
	276
	277	/* i2c implementation */
	278
d2653e92 JD	279	static int wm8739_probe(struct i2c_client *client,
d2653e92 JD	280	const struct i2c_device_id *id)
75c4570c	281	{
75c4570c	282	struct wm8739_state *state;
f1460e97	283	struct v4l2_subdev *sd;
75c4570c	284
188f3457 HV	285	/* Check if the adapter supports the needed features */
	286	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	287	return -EIO;
	288
099b8e73 HV	289	v4l_info(client, "chip found @ 0x%x (%s)\n",
099b8e73 HV	290	client->addr << 1, client->adapter->name);
75c4570c HV	291
75c4570c HV	292	state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
6c832e36	293	if (state == NULL)
75c4570c	294	return -ENOMEM;
f1460e97 HV	295	sd = &state->sd;
f1460e97 HV	296	v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
75c4570c HV	297	state->vol_l = 0x17; /* 0dB */
	298	state->vol_r = 0x17; /* 0dB */
	299	state->muted = 0;
	300	state->balance = 32768;
	301	/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
	302	state->volume = ((long)state->vol_l + 1) * 65535 / 31;
	303	state->clock_freq = 48000;
75c4570c	304
099b8e73 HV	305	/* Initialize wm8739 */
	306
	307	/* reset */
f1460e97	308	wm8739_write(sd, R15, 0x00);
099b8e73	309	/* filter setting, high path, offet clear */
f1460e97	310	wm8739_write(sd, R5, 0x000);
099b8e73	311	/* ADC, OSC, Power Off mode Disable */
f1460e97	312	wm8739_write(sd, R6, 0x000);
099b8e73 HV	313	/* Digital Audio interface format:
099b8e73 HV	314	Enable Master mode, 24 bit, MSB first/left justified */
f1460e97	315	wm8739_write(sd, R7, 0x049);
099b8e73	316	/* sampling control: normal, 256fs, 48KHz sampling rate */
f1460e97	317	wm8739_write(sd, R8, 0x000);
099b8e73	318	/* activate */
f1460e97	319	wm8739_write(sd, R9, 0x001);
099b8e73	320	/* set volume/mute */
f1460e97	321	wm8739_set_audio(sd);
75c4570c HV	322	return 0;
	323	}
	324
49457cc2	325	static int wm8739_remove(struct i2c_client *client)
75c4570c	326	{
f1460e97 HV	327	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	328
	329	v4l2_device_unregister_subdev(sd);
	330	kfree(to_state(sd));
75c4570c HV	331	return 0;
	332	}
	333
af294867 JD	334	static const struct i2c_device_id wm8739_id[] = {
	335	{ "wm8739", 0 },
	336	{ }
	337	};
	338	MODULE_DEVICE_TABLE(i2c, wm8739_id);
	339
49457cc2 HV	340	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
49457cc2 HV	341	.name = "wm8739",
49457cc2 HV	342	.probe = wm8739_probe,
49457cc2 HV	343	.remove = wm8739_remove,
af294867	344	.id_table = wm8739_id,
75c4570c	345	};