[linux-block.git] / drivers / media / i2c / wm8739.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * wm8739
 *
 * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
 *
 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
 * - Cleanup
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.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;
	struct v4l2_ctrl_handler hdl;
	struct {
		/* audio cluster */
		struct v4l2_ctrl *volume;
		struct v4l2_ctrl *mute;
		struct v4l2_ctrl *balance;
	};
	u32 clock_freq;
};

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

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct wm8739_state, hdl)->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;
}

static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct wm8739_state *state = to_state(sd);
	unsigned int work_l, work_r;
	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 */
	u16 mute;

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_VOLUME:
		break;

	default:
		return -EINVAL;
	}

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

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

	/* set audio volume etc. */
	mute = state->mute->val ? 0x80 : 0;

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

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

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_log_status(struct v4l2_subdev *sd)
{
	struct wm8739_state *state = to_state(sd);

	v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
	return 0;
}

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

static const struct v4l2_ctrl_ops wm8739_ctrl_ops = {
	.s_ctrl = wm8739_s_ctrl,
};

static const struct v4l2_subdev_core_ops wm8739_core_ops = {
	.log_status = wm8739_log_status,
};

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)
{
	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 = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
	v4l2_ctrl_handler_init(&state->hdl, 2);
	state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
			V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736);
	state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
			V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768);
	sd->ctrl_handler = &state->hdl;
	if (state->hdl.error) {
		int err = state->hdl.error;

		v4l2_ctrl_handler_free(&state->hdl);
		return err;
	}
	v4l2_ctrl_cluster(3, &state->volume);

	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 */
	v4l2_ctrl_handler_setup(&state->hdl);
	return 0;
}

static void wm8739_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct wm8739_state *state = to_state(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&state->hdl);
}

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

static struct i2c_driver wm8739_driver = {
	.driver = {
		.name	= "wm8739",
	},
	.probe_new	= wm8739_probe,
	.remove		= wm8739_remove,
	.id_table	= wm8739_id,
};

module_i2c_driver(wm8739_driver);
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
75c4570c HV	2	/*
	3	* wm8739
	4	*
	5	* Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
	6	*
	7	* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
	8	* - Cleanup
75c4570c HV	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/types.h>
5a0e3ad6	13	#include <linux/slab.h>
75c4570c	14	#include <linux/ioctl.h>
7c0f6ba6	15	#include <linux/uaccess.h>
75c4570c	16	#include <linux/i2c.h>
33b687cf	17	#include <linux/videodev2.h>
f1460e97	18	#include <media/v4l2-device.h>
f687d19d	19	#include <media/v4l2-ctrls.h>
75c4570c HV	20
	21	MODULE_DESCRIPTION("wm8739 driver");
	22	MODULE_AUTHOR("T. Adachi, Hans Verkuil");
	23	MODULE_LICENSE("GPL");
	24
099b8e73	25	static int debug;
75c4570c HV	26
	27	module_param(debug, int, 0644);
	28
	29	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	30
	31
75c4570c HV	32	/* ------------------------------------------------------------------------ */
	33
	34	enum {
	35	R0 = 0, R1,
	36	R5 = 5, R6, R7, R8, R9, R15 = 15,
	37	TOT_REGS
	38	};
	39
	40	struct wm8739_state {
f1460e97	41	struct v4l2_subdev sd;
f687d19d HV	42	struct v4l2_ctrl_handler hdl;
	43	struct {
	44	/* audio cluster */
	45	struct v4l2_ctrl *volume;
	46	struct v4l2_ctrl *mute;
	47	struct v4l2_ctrl *balance;
	48	};
75c4570c	49	u32 clock_freq;
75c4570c HV	50	};
75c4570c HV	51
f1460e97 HV	52	static inline struct wm8739_state to_state(struct v4l2_subdev sd)
	53	{
	54	return container_of(sd, struct wm8739_state, sd);
	55	}
	56
f687d19d HV	57	static inline struct v4l2_subdev to_sd(struct v4l2_ctrl ctrl)
	58	{
	59	return &container_of(ctrl->handler, struct wm8739_state, hdl)->sd;
	60	}
	61
75c4570c HV	62	/* ------------------------------------------------------------------------ */
75c4570c HV	63
f1460e97	64	static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
75c4570c	65	{
f1460e97	66	struct i2c_client *client = v4l2_get_subdevdata(sd);
75c4570c HV	67	int i;
	68
	69	if (reg < 0 \|\| reg >= TOT_REGS) {
f1460e97	70	v4l2_err(sd, "Invalid register R%d\n", reg);
75c4570c HV	71	return -1;
	72	}
	73
f1460e97	74	v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);
75c4570c	75
099b8e73 HV	76	for (i = 0; i < 3; i++)
	77	if (i2c_smbus_write_byte_data(client,
	78	(reg << 1) \| (val >> 8), val & 0xff) == 0)
75c4570c	79	return 0;
f1460e97	80	v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
75c4570c HV	81	return -1;
	82	}
	83
f687d19d	84	static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl)
75c4570c	85	{
f687d19d	86	struct v4l2_subdev *sd = to_sd(ctrl);
f1460e97	87	struct wm8739_state *state = to_state(sd);
75c4570c	88	unsigned int work_l, work_r;
f687d19d HV	89	u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	90	u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	91	u16 mute;
75c4570c HV	92
75c4570c HV	93	switch (ctrl->id) {
75c4570c	94	case V4L2_CID_AUDIO_VOLUME:
75c4570c HV	95	break;
	96
	97	default:
	98	return -EINVAL;
	99	}
	100
	101	/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
f687d19d HV	102	work_l = (min(65536 - state->balance->val, 32768) * state->volume->val) / 32768;
f687d19d HV	103	work_r = (min(state->balance->val, 32768) * state->volume->val) / 32768;
75c4570c	104
f687d19d HV	105	vol_l = (long)work_l * 31 / 65535;
f687d19d HV	106	vol_r = (long)work_r * 31 / 65535;
75c4570c HV	107
75c4570c HV	108	/* set audio volume etc. */
f687d19d HV	109	mute = state->mute->val ? 0x80 : 0;
	110
	111	/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
	112	* Default setting: 0x17 = 0 dB
	113	*/
	114	wm8739_write(sd, R0, (vol_l & 0x1f) \| mute);
	115	wm8739_write(sd, R1, (vol_r & 0x1f) \| mute);
75c4570c HV	116	return 0;
	117	}
	118
	119	/* ------------------------------------------------------------------------ */
	120
f1460e97	121	static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
75c4570c	122	{
f1460e97 HV	123	struct wm8739_state *state = to_state(sd);
	124
	125	state->clock_freq = audiofreq;
	126	/* de-activate */
	127	wm8739_write(sd, R9, 0x000);
	128	switch (audiofreq) {
	129	case 44100:
	130	/* 256fps, fs=44.1k */
	131	wm8739_write(sd, R8, 0x020);
	132	break;
	133	case 48000:
	134	/* 256fps, fs=48k */
	135	wm8739_write(sd, R8, 0x000);
	136	break;
	137	case 32000:
	138	/* 256fps, fs=32k */
	139	wm8739_write(sd, R8, 0x018);
	140	break;
	141	default:
75c4570c HV	142	break;
75c4570c HV	143	}
f1460e97 HV	144	/* activate */
	145	wm8739_write(sd, R9, 0x001);
	146	return 0;
	147	}
75c4570c	148
f1460e97 HV	149	static int wm8739_log_status(struct v4l2_subdev *sd)
	150	{
	151	struct wm8739_state *state = to_state(sd);
75c4570c	152
f1460e97	153	v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
f687d19d	154	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
75c4570c HV	155	return 0;
	156	}
	157
f1460e97 HV	158	/* ----------------------------------------------------------------------- */
f1460e97 HV	159
f687d19d HV	160	static const struct v4l2_ctrl_ops wm8739_ctrl_ops = {
	161	.s_ctrl = wm8739_s_ctrl,
	162	};
	163
f1460e97 HV	164	static const struct v4l2_subdev_core_ops wm8739_core_ops = {
f1460e97 HV	165	.log_status = wm8739_log_status,
f1460e97 HV	166	};
	167
	168	static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
	169	.s_clock_freq = wm8739_s_clock_freq,
	170	};
	171
	172	static const struct v4l2_subdev_ops wm8739_ops = {
	173	.core = &wm8739_core_ops,
	174	.audio = &wm8739_audio_ops,
	175	};
	176
75c4570c HV	177	/* ------------------------------------------------------------------------ */
	178
	179	/* i2c implementation */
	180
299b0129	181	static int wm8739_probe(struct i2c_client *client)
75c4570c	182	{
75c4570c	183	struct wm8739_state *state;
f1460e97	184	struct v4l2_subdev *sd;
75c4570c	185
188f3457 HV	186	/* Check if the adapter supports the needed features */
	187	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	188	return -EIO;
	189
099b8e73 HV	190	v4l_info(client, "chip found @ 0x%x (%s)\n",
099b8e73 HV	191	client->addr << 1, client->adapter->name);
75c4570c	192
c02b211d	193	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
6c832e36	194	if (state == NULL)
75c4570c	195	return -ENOMEM;
f1460e97 HV	196	sd = &state->sd;
f1460e97 HV	197	v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
f687d19d HV	198	v4l2_ctrl_handler_init(&state->hdl, 2);
	199	state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
	200	V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736);
	201	state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
	202	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	203	state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
	204	V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768);
	205	sd->ctrl_handler = &state->hdl;
	206	if (state->hdl.error) {
	207	int err = state->hdl.error;
	208
	209	v4l2_ctrl_handler_free(&state->hdl);
f687d19d HV	210	return err;
	211	}
	212	v4l2_ctrl_cluster(3, &state->volume);
	213
75c4570c	214	state->clock_freq = 48000;
75c4570c	215
099b8e73 HV	216	/* Initialize wm8739 */
	217
	218	/* reset */
f1460e97	219	wm8739_write(sd, R15, 0x00);
099b8e73	220	/* filter setting, high path, offet clear */
f1460e97	221	wm8739_write(sd, R5, 0x000);
099b8e73	222	/* ADC, OSC, Power Off mode Disable */
f1460e97	223	wm8739_write(sd, R6, 0x000);
099b8e73 HV	224	/* Digital Audio interface format:
099b8e73 HV	225	Enable Master mode, 24 bit, MSB first/left justified */
f1460e97	226	wm8739_write(sd, R7, 0x049);
099b8e73	227	/* sampling control: normal, 256fs, 48KHz sampling rate */
f1460e97	228	wm8739_write(sd, R8, 0x000);
099b8e73	229	/* activate */
f1460e97	230	wm8739_write(sd, R9, 0x001);
099b8e73	231	/* set volume/mute */
f687d19d	232	v4l2_ctrl_handler_setup(&state->hdl);
75c4570c HV	233	return 0;
	234	}
	235
ed5c2f5f	236	static void wm8739_remove(struct i2c_client *client)
75c4570c	237	{
f1460e97	238	struct v4l2_subdev *sd = i2c_get_clientdata(client);
f687d19d	239	struct wm8739_state *state = to_state(sd);
f1460e97 HV	240
f1460e97 HV	241	v4l2_device_unregister_subdev(sd);
f687d19d	242	v4l2_ctrl_handler_free(&state->hdl);
75c4570c HV	243	}
75c4570c HV	244
af294867 JD	245	static const struct i2c_device_id wm8739_id[] = {
	246	{ "wm8739", 0 },
	247	{ }
	248	};
	249	MODULE_DEVICE_TABLE(i2c, wm8739_id);
	250
49facfaa HV	251	static struct i2c_driver wm8739_driver = {
49facfaa HV	252	.driver = {
49facfaa HV	253	.name = "wm8739",
49facfaa HV	254	},
299b0129	255	.probe_new = wm8739_probe,
49facfaa HV	256	.remove = wm8739_remove,
49facfaa HV	257	.id_table = wm8739_id,
75c4570c	258	};
49facfaa	259
c6e8d86f	260	module_i2c_driver(wm8739_driver);