neo1973_wm8753.c

linux 内核源代码

	int shift = (kcontrol->private_value >> 8) & 0x0F;
	int mask = (kcontrol->private_value >> 16) & 0xFF;

	ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
	return 0;
}

static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int reg = kcontrol->private_value & 0xFF;
	int shift = (kcontrol->private_value >> 8) & 0x0F;
	int mask = (kcontrol->private_value >> 16) & 0xFF;

	if (((lm4857_regs[reg] >> shift ) & mask) ==
		ucontrol->value.integer.value[0])
		return 0;

	lm4857_regs[reg] &= ~ (mask << shift);
	lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
	lm4857_write_regs();
	return 1;
}

static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;

	if (value)
		value -= 5;

	ucontrol->value.integer.value[0] = value;
	return 0;
}

static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	u8 value = ucontrol->value.integer.value[0];

	if (value)
		value += 5;

	if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
		return 0;

	lm4857_regs[LM4857_CTRL] &= 0xF0;
	lm4857_regs[LM4857_CTRL] |= value;
	lm4857_write_regs();
	return 1;
}

static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
	SND_SOC_DAPM_LINE("Audio Out", NULL),
	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
	SND_SOC_DAPM_LINE("GSM Line In", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Call Mic", NULL),
};


/* example machine audio_mapnections */
static const char* audio_map[][3] = {

	/* Connections to the lm4857 amp */
	{"Audio Out", NULL, "LOUT1"},
	{"Audio Out", NULL, "ROUT1"},

	/* Connections to the GSM Module */
	{"GSM Line Out", NULL, "MONO1"},
	{"GSM Line Out", NULL, "MONO2"},
	{"RXP", NULL, "GSM Line In"},
	{"RXN", NULL, "GSM Line In"},

	/* Connections to Headset */
	{"MIC1", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Headset Mic"},

	/* Call Mic */
	{"MIC2", NULL, "Mic Bias"},
	{"MIC2N", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Call Mic"},

	/* Connect the ALC pins */
	{"ACIN", NULL, "ACOP"},

	{NULL, NULL, NULL},
};

static const char *lm4857_mode[] = {
	"Off",
	"Call Speaker",
	"Stereo Speakers",
	"Stereo Speakers + Headphones",
	"Headphones"
};

static const struct soc_enum lm4857_mode_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
};

static const char *neo_scenarios[] = {
	"Off",
	"GSM Handset",
	"GSM Headset",
	"GSM Bluetooth",
	"Speakers",
	"Headphones",
	"Capture Handset",
	"Capture Headset",
	"Capture Bluetooth"
};

static const struct soc_enum neo_scenario_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios),neo_scenarios),
};

static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
	SOC_SINGLE_EXT("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_SINGLE_EXT("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_SINGLE_EXT("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
		lm4857_get_mode, lm4857_set_mode),
	SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
		neo1973_get_scenario, neo1973_set_scenario),
	SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
		lm4857_get_reg, lm4857_set_reg),
	SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
		lm4857_get_reg, lm4857_set_reg),
};

/*
 * This is an example machine initialisation for a wm8753 connected to a
 * neo1973 II. It is missing logic to detect hp/mic insertions and logic
 * to re-route the audio in such an event.
 */
static int neo1973_wm8753_init(struct snd_soc_codec *codec)
{
	int i, err;

	/* set up NC codec pins */
	snd_soc_dapm_set_endpoint(codec, "LOUT2", 0);
	snd_soc_dapm_set_endpoint(codec, "ROUT2", 0);
	snd_soc_dapm_set_endpoint(codec, "OUT3",  0);
	snd_soc_dapm_set_endpoint(codec, "OUT4",  0);
	snd_soc_dapm_set_endpoint(codec, "LINE1", 0);
	snd_soc_dapm_set_endpoint(codec, "LINE2", 0);


	/* set endpoints to default mode */
	set_scenario_endpoints(codec, NEO_AUDIO_OFF);

	/* Add neo1973 specific widgets */
	for (i = 0; i < ARRAY_SIZE(wm8753_dapm_widgets); i++)
		snd_soc_dapm_new_control(codec, &wm8753_dapm_widgets[i]);

	/* add neo1973 specific controls */
	for (i = 0; i < ARRAY_SIZE(wm8753_neo1973_controls); i++) {
		err = snd_ctl_add(codec->card,
				snd_soc_cnew(&wm8753_neo1973_controls[i],
				codec, NULL));
		if (err < 0)
			return err;
	}

	/* set up neo1973 specific audio path audio_mapnects */
	for (i = 0; audio_map[i][0] != NULL; i++) {
		snd_soc_dapm_connect_input(codec, audio_map[i][0],
			audio_map[i][1], audio_map[i][2]);
	}

	snd_soc_dapm_sync_endpoints(codec);
	return 0;
}

/*
 * BT Codec DAI
 */
static struct snd_soc_cpu_dai bt_dai =
{	.name = "Bluetooth",
	.id = 0,
	.type = SND_SOC_DAI_PCM,
	.playback = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
};

static struct snd_soc_dai_link neo1973_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
	.name = "WM8753",
	.stream_name = "WM8753 HiFi",
	.cpu_dai = &s3c24xx_i2s_dai,
	.codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
	.init = neo1973_wm8753_init,
	.ops = &neo1973_hifi_ops,
},
{ /* Voice via BT */
	.name = "Bluetooth",
	.stream_name = "Voice",
	.cpu_dai = &bt_dai,
	.codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
	.ops = &neo1973_voice_ops,
},
};

static struct snd_soc_machine neo1973 = {
	.name = "neo1973",
	.dai_link = neo1973_dai,
	.num_links = ARRAY_SIZE(neo1973_dai),
};

static struct wm8753_setup_data neo1973_wm8753_setup = {
	.i2c_address = 0x1a,
};

static struct snd_soc_device neo1973_snd_devdata = {
	.machine = &neo1973,
	.platform = &s3c24xx_soc_platform,
	.codec_dev = &soc_codec_dev_wm8753,
	.codec_data = &neo1973_wm8753_setup,
};

static struct i2c_client client_template;

static unsigned short normal_i2c[] = { 0x7C, I2C_CLIENT_END };

/* Magic definition of all other variables and things */
I2C_CLIENT_INSMOD;

static int lm4857_amp_probe(struct i2c_adapter *adap, int addr, int kind)
{
	int ret;

	client_template.adapter = adap;
	client_template.addr = addr;

	i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
	if (i2c == NULL)
		return -ENOMEM;

	ret = i2c_attach_client(i2c);
	if (ret < 0) {
		printk(KERN_ERR "LM4857 failed to attach at addr %x\n", addr);
		goto exit_err;
	}

	lm4857_write_regs();
	return ret;

exit_err:
	kfree(i2c);
	return ret;
}

static int lm4857_i2c_detach(struct i2c_client *client)
{
	i2c_detach_client(client);
	kfree(client);
	return 0;
}

static int lm4857_i2c_attach(struct i2c_adapter *adap)
{
	return i2c_probe(adap, &addr_data, lm4857_amp_probe);
}

/* corgi i2c codec control layer */
static struct i2c_driver lm4857_i2c_driver = {
	.driver = {
		.name = "LM4857 I2C Amp",
		.owner = THIS_MODULE,
	},
	.id =             I2C_DRIVERID_LM4857,
	.attach_adapter = lm4857_i2c_attach,
	.detach_client =  lm4857_i2c_detach,
	.command =        NULL,
};

static struct i2c_client client_template = {
	.name =   "LM4857",
	.driver = &lm4857_i2c_driver,
};

static struct platform_device *neo1973_snd_device;

static int __init neo1973_init(void)
{
	int ret;

	neo1973_snd_device = platform_device_alloc("soc-audio", -1);
	if (!neo1973_snd_device)
		return -ENOMEM;

	platform_set_drvdata(neo1973_snd_device, &neo1973_snd_devdata);
	neo1973_snd_devdata.dev = &neo1973_snd_device->dev;
	ret = platform_device_add(neo1973_snd_device);

	if (ret)
		platform_device_put(neo1973_snd_device);

	ret = i2c_add_driver(&lm4857_i2c_driver);
	if (ret != 0)
		printk(KERN_ERR "can't add i2c driver");

	return ret;
}

static void __exit neo1973_exit(void)
{
	platform_device_unregister(neo1973_snd_device);
}

module_init(neo1973_init);
module_exit(neo1973_exit);

/* Module information */
MODULE_AUTHOR("Graeme Gregory, [e-mail], www.wolfsonmicro.com");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
MODULE_LICENSE("GPL");