[mirror_ubuntu-jammy-kernel.git] / drivers / mfd / wl1273-core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * MFD driver for wl1273 FM radio and audio codec submodules.
 *
 * Copyright (C) 2011 Nokia Corporation
 * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
 */

#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#include <linux/module.h>

#define DRIVER_DESC "WL1273 FM Radio Core"

static const struct i2c_device_id wl1273_driver_id_table[] = {
	{ WL1273_FM_DRIVER_NAME, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);

static int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value)
{
	struct i2c_client *client = core->client;
	u8 b[2];
	int r;

	r = i2c_smbus_read_i2c_block_data(client, reg, sizeof(b), b);
	if (r != 2) {
		dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
		return -EREMOTEIO;
	}

	*value = (u16)b[0] << 8 | b[1];

	return 0;
}

static int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
{
	struct i2c_client *client = core->client;
	u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
	int r;

	r = i2c_smbus_write_i2c_block_data(client, cmd, sizeof(buf), buf);
	if (r) {
		dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
		return r;
	}

	return 0;
}

static int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len)
{
	struct i2c_client *client = core->client;
	struct i2c_msg msg;
	int r;

	msg.addr = client->addr;
	msg.flags = 0;
	msg.buf = data;
	msg.len = len;

	r = i2c_transfer(client->adapter, &msg, 1);
	if (r != 1) {
		dev_err(&client->dev, "%s: write error.\n", __func__);
		return -EREMOTEIO;
	}

	return 0;
}

/**
 * wl1273_fm_set_audio() -	Set audio mode.
 * @core:			A pointer to the device struct.
 * @new_mode:			The new audio mode.
 *
 * Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
 */
static int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
{
	int r = 0;

	if (core->mode == WL1273_MODE_OFF ||
	    core->mode == WL1273_MODE_SUSPENDED)
		return -EPERM;

	if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
		r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
					WL1273_PCM_DEF_MODE);
		if (r)
			goto out;

		r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
					core->i2s_mode);
		if (r)
			goto out;

		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
					WL1273_AUDIO_ENABLE_I2S);
		if (r)
			goto out;

	} else if (core->mode == WL1273_MODE_RX &&
		   new_mode == WL1273_AUDIO_ANALOG) {
		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
					WL1273_AUDIO_ENABLE_ANALOG);
		if (r)
			goto out;

	} else if (core->mode == WL1273_MODE_TX &&
		   new_mode == WL1273_AUDIO_DIGITAL) {
		r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
					core->i2s_mode);
		if (r)
			goto out;

		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
					WL1273_AUDIO_IO_SET_I2S);
		if (r)
			goto out;

	} else if (core->mode == WL1273_MODE_TX &&
		   new_mode == WL1273_AUDIO_ANALOG) {
		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
					WL1273_AUDIO_IO_SET_ANALOG);
		if (r)
			goto out;
	}

	core->audio_mode = new_mode;
out:
	return r;
}

/**
 * wl1273_fm_set_volume() -	Set volume.
 * @core:			A pointer to the device struct.
 * @volume:			The new volume value.
 */
static int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
{
	int r;

	if (volume > WL1273_MAX_VOLUME)
		return -EINVAL;

	if (core->volume == volume)
		return 0;

	r = wl1273_fm_write_cmd(core, WL1273_VOLUME_SET, volume);
	if (r)
		return r;

	core->volume = volume;
	return 0;
}

static int wl1273_core_probe(struct i2c_client *client,
				       const struct i2c_device_id *id)
{
	struct wl1273_fm_platform_data *pdata = dev_get_platdata(&client->dev);
	struct wl1273_core *core;
	struct mfd_cell *cell;
	int children = 0;
	int r = 0;

	dev_dbg(&client->dev, "%s\n", __func__);

	if (!pdata) {
		dev_err(&client->dev, "No platform data.\n");
		return -EINVAL;
	}

	if (!(pdata->children & WL1273_RADIO_CHILD)) {
		dev_err(&client->dev, "Cannot function without radio child.\n");
		return -EINVAL;
	}

	core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL);
	if (!core)
		return -ENOMEM;

	core->pdata = pdata;
	core->client = client;
	mutex_init(&core->lock);

	i2c_set_clientdata(client, core);

	dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);

	cell = &core->cells[children];
	cell->name = "wl1273_fm_radio";
	cell->platform_data = &core;
	cell->pdata_size = sizeof(core);
	children++;

	core->read = wl1273_fm_read_reg;
	core->write = wl1273_fm_write_cmd;
	core->write_data = wl1273_fm_write_data;
	core->set_audio = wl1273_fm_set_audio;
	core->set_volume = wl1273_fm_set_volume;

	if (pdata->children & WL1273_CODEC_CHILD) {
		cell = &core->cells[children];

		dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
		cell->name = "wl1273-codec";
		cell->platform_data = &core;
		cell->pdata_size = sizeof(core);
		children++;
	}

	dev_dbg(&client->dev, "%s: number of children: %d.\n",
		__func__, children);

	r = devm_mfd_add_devices(&client->dev, -1, core->cells,
				 children, NULL, 0, NULL);
	if (r)
		goto err;

	return 0;

err:
	pdata->free_resources();

	dev_dbg(&client->dev, "%s\n", __func__);

	return r;
}

static struct i2c_driver wl1273_core_driver = {
	.driver = {
		.name = WL1273_FM_DRIVER_NAME,
	},
	.probe = wl1273_core_probe,
	.id_table = wl1273_driver_id_table,
};

static int __init wl1273_core_init(void)
{
	int r;

	r = i2c_add_driver(&wl1273_core_driver);
	if (r) {
		pr_err(WL1273_FM_DRIVER_NAME
		       ": driver registration failed\n");
		return r;
	}

	return r;
}

static void __exit wl1273_core_exit(void)
{
	i2c_del_driver(&wl1273_core_driver);
}
late_initcall(wl1273_core_init);
module_exit(wl1273_core_exit);

MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
2b27bdcc	1	// SPDX-License-Identifier: GPL-2.0-only
383268a8 MA	2	/*
	3	* MFD driver for wl1273 FM radio and audio codec submodules.
	4	*
94fd5b74	5	* Copyright (C) 2011 Nokia Corporation
383268a8	6	* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
383268a8 MA	7	*/
	8
	9	#include <linux/mfd/wl1273-core.h>
	10	#include <linux/slab.h>
4e36dd33	11	#include <linux/module.h>
383268a8 MA	12
	13	#define DRIVER_DESC "WL1273 FM Radio Core"
	14
1206552b	15	static const struct i2c_device_id wl1273_driver_id_table[] = {
383268a8 MA	16	{ WL1273_FM_DRIVER_NAME, 0 },
	17	{ }
	18	};
	19	MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
	20
94fd5b74 MA	21	static int wl1273_fm_read_reg(struct wl1273_core core, u8 reg, u16 value)
	22	{
	23	struct i2c_client *client = core->client;
	24	u8 b[2];
	25	int r;
	26
	27	r = i2c_smbus_read_i2c_block_data(client, reg, sizeof(b), b);
	28	if (r != 2) {
	29	dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
	30	return -EREMOTEIO;
	31	}
	32
	33	*value = (u16)b[0] << 8 \| b[1];
	34
	35	return 0;
	36	}
	37
	38	static int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
	39	{
	40	struct i2c_client *client = core->client;
	41	u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
	42	int r;
	43
	44	r = i2c_smbus_write_i2c_block_data(client, cmd, sizeof(buf), buf);
	45	if (r) {
	46	dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
	47	return r;
	48	}
	49
	50	return 0;
	51	}
	52
	53	static int wl1273_fm_write_data(struct wl1273_core core, u8 data, u16 len)
	54	{
	55	struct i2c_client *client = core->client;
	56	struct i2c_msg msg;
	57	int r;
	58
	59	msg.addr = client->addr;
	60	msg.flags = 0;
	61	msg.buf = data;
	62	msg.len = len;
	63
	64	r = i2c_transfer(client->adapter, &msg, 1);
	65	if (r != 1) {
	66	dev_err(&client->dev, "%s: write error.\n", __func__);
	67	return -EREMOTEIO;
	68	}
	69
	70	return 0;
	71	}
	72
	73	/**
	74	* wl1273_fm_set_audio() - Set audio mode.
	75	* @core: A pointer to the device struct.
	76	* @new_mode: The new audio mode.
	77	*
	78	* Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
	79	*/
	80	static int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
	81	{
	82	int r = 0;
	83
	84	if (core->mode == WL1273_MODE_OFF \|\|
85	core->mode == WL1273_MODE_SUSPENDED)
86	return -EPERM;
87
88	if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
89	r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
90	WL1273_PCM_DEF_MODE);
91	if (r)
92	goto out;
93
94	r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
95	core->i2s_mode);
96	if (r)
97	goto out;
98
99	r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
100	WL1273_AUDIO_ENABLE_I2S);
101	if (r)
102	goto out;
103
104	} else if (core->mode == WL1273_MODE_RX &&
105	new_mode == WL1273_AUDIO_ANALOG) {
106	r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
107	WL1273_AUDIO_ENABLE_ANALOG);
108	if (r)
109	goto out;
110
111	} else if (core->mode == WL1273_MODE_TX &&
112	new_mode == WL1273_AUDIO_DIGITAL) {
113	r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
114	core->i2s_mode);
115	if (r)
116	goto out;
117
118	r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
119	WL1273_AUDIO_IO_SET_I2S);
120	if (r)
121	goto out;
122
123	} else if (core->mode == WL1273_MODE_TX &&
124	new_mode == WL1273_AUDIO_ANALOG) {
125	r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
126	WL1273_AUDIO_IO_SET_ANALOG);
127	if (r)
128	goto out;
129	}
130
131	core->audio_mode = new_mode;
132	out:
133	return r;
134	}
135
136	/**
137	* wl1273_fm_set_volume() - Set volume.
138	* @core: A pointer to the device struct.
139	* @volume: The new volume value.
140	*/
141	static int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
142	{
94fd5b74 MA	143	int r;
	144
	145	if (volume > WL1273_MAX_VOLUME)
	146	return -EINVAL;
	147
	148	if (core->volume == volume)
	149	return 0;
	150
	151	r = wl1273_fm_write_cmd(core, WL1273_VOLUME_SET, volume);
	152	if (r)
	153	return r;
	154
	155	core->volume = volume;
	156	return 0;
	157	}
	158
f791be49	159	static int wl1273_core_probe(struct i2c_client *client,
383268a8 MA	160	const struct i2c_device_id *id)
383268a8 MA	161	{
334a41ce	162	struct wl1273_fm_platform_data *pdata = dev_get_platdata(&client->dev);
383268a8 MA	163	struct wl1273_core *core;
	164	struct mfd_cell *cell;
	165	int children = 0;
	166	int r = 0;
	167
	168	dev_dbg(&client->dev, "%s\n", __func__);
	169
	170	if (!pdata) {
	171	dev_err(&client->dev, "No platform data.\n");
	172	return -EINVAL;
	173	}
	174
	175	if (!(pdata->children & WL1273_RADIO_CHILD)) {
	176	dev_err(&client->dev, "Cannot function without radio child.\n");
	177	return -EINVAL;
	178	}
	179
bba07827	180	core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL);
383268a8 MA	181	if (!core)
	182	return -ENOMEM;
	183
	184	core->pdata = pdata;
	185	core->client = client;
	186	mutex_init(&core->lock);
	187
	188	i2c_set_clientdata(client, core);
	189
	190	dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
	191
	192	cell = &core->cells[children];
	193	cell->name = "wl1273_fm_radio";
9e554696 SO	194	cell->platform_data = &core;
9e554696 SO	195	cell->pdata_size = sizeof(core);
383268a8 MA	196	children++;
383268a8 MA	197
94fd5b74 MA	198	core->read = wl1273_fm_read_reg;
	199	core->write = wl1273_fm_write_cmd;
	200	core->write_data = wl1273_fm_write_data;
	201	core->set_audio = wl1273_fm_set_audio;
	202	core->set_volume = wl1273_fm_set_volume;
	203
383268a8 MA	204	if (pdata->children & WL1273_CODEC_CHILD) {
	205	cell = &core->cells[children];
	206
	207	dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
	208	cell->name = "wl1273-codec";
9e554696 SO	209	cell->platform_data = &core;
9e554696 SO	210	cell->pdata_size = sizeof(core);
383268a8 MA	211	children++;
	212	}
	213
	214	dev_dbg(&client->dev, "%s: number of children: %d.\n",
	215	__func__, children);
	216
14856f75 LD	217	r = devm_mfd_add_devices(&client->dev, -1, core->cells,
14856f75 LD	218	children, NULL, 0, NULL);
383268a8 MA	219	if (r)
	220	goto err;
	221
	222	return 0;
	223
	224	err:
383268a8	225	pdata->free_resources();
383268a8 MA	226
	227	dev_dbg(&client->dev, "%s\n", __func__);
	228
	229	return r;
	230	}
	231
	232	static struct i2c_driver wl1273_core_driver = {
	233	.driver = {
	234	.name = WL1273_FM_DRIVER_NAME,
	235	},
	236	.probe = wl1273_core_probe,
	237	.id_table = wl1273_driver_id_table,
383268a8 MA	238	};
	239
	240	static int __init wl1273_core_init(void)
	241	{
	242	int r;
	243
	244	r = i2c_add_driver(&wl1273_core_driver);
	245	if (r) {
	246	pr_err(WL1273_FM_DRIVER_NAME
	247	": driver registration failed\n");
	248	return r;
	249	}
	250
	251	return r;
	252	}
	253
	254	static void __exit wl1273_core_exit(void)
	255	{
	256	i2c_del_driver(&wl1273_core_driver);
	257	}
	258	late_initcall(wl1273_core_init);
	259	module_exit(wl1273_core_exit);
	260
	261	MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
	262	MODULE_DESCRIPTION(DRIVER_DESC);
	263	MODULE_LICENSE("GPL");