Signed-off-by: Wolfram Sang w.sang@pengutronix.de --- include/sound/max9768.h | 23 ++++ sound/soc/codecs/Kconfig | 4 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/max9768.c | 244 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 273 insertions(+), 0 deletions(-) create mode 100644 include/sound/max9768.h create mode 100644 sound/soc/codecs/max9768.c
diff --git a/include/sound/max9768.h b/include/sound/max9768.h new file mode 100644 index 0000000..f8f1639 --- /dev/null +++ b/include/sound/max9768.h @@ -0,0 +1,23 @@ +/* + * Platform data for MAX9768 + * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. + * same licence as the driver + */ + +#ifndef __SOUND_MAX9768_PDATA_H__ +#define __SOUND_MAX9768_PDATA_H__ + +/** + * struct max9768_pdata - optional platform specific MAX9768 configuration + * @shdn_gpio: GPIO to SHDN pin. If not valid, pin must be hardwired HIGH + * @mute_gpio: GPIO to MUTE pin. If not valid, control for mute won't be added + * @flags: configuration flags, e.g. set classic PWM mode. + */ +struct max9768_pdata { + int shdn_gpio; + int mute_gpio; + unsigned flags; +#define MAX9768_FLAG_CLASSIC_PWM (1 << 0) +}; + +#endif /* __SOUND_MAX9768_PDATA_H__*/ diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 7c205e7..a861014 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -37,6 +37,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_DFBMCS320 select SND_SOC_JZ4740_CODEC select SND_SOC_LM4857 if I2C + select SND_SOC_MAX9768 if I2C select SND_SOC_MAX98088 if I2C select SND_SOC_MAX98095 if I2C select SND_SOC_MAX9850 if I2C @@ -425,6 +426,9 @@ config SND_SOC_WM9713 config SND_SOC_LM4857 tristate
+config SND_SOC_MAX9768 + tristate + config SND_SOC_MAX9877 tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index de80781..cf3555b 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -25,6 +25,7 @@ snd-soc-dmic-objs := dmic.o snd-soc-jz4740-codec-objs := jz4740.o snd-soc-l3-objs := l3.o snd-soc-lm4857-objs := lm4857.o +snd-soc-max9768-objs := max9768.o snd-soc-max98088-objs := max98088.o snd-soc-max98095-objs := max98095.o snd-soc-max9850-objs := max9850.o @@ -129,6 +130,7 @@ obj-$(CONFIG_SND_SOC_DMIC) += snd-soc-dmic.o obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o obj-$(CONFIG_SND_SOC_LM4857) += snd-soc-lm4857.o obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o +obj-$(CONFIG_SND_SOC_MAX9768) += snd-soc-max9768.o obj-$(CONFIG_SND_SOC_MAX98088) += snd-soc-max98088.o obj-$(CONFIG_SND_SOC_MAX98095) += snd-soc-max98095.o obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o diff --git a/sound/soc/codecs/max9768.c b/sound/soc/codecs/max9768.c new file mode 100644 index 0000000..bd57b45 --- /dev/null +++ b/sound/soc/codecs/max9768.c @@ -0,0 +1,244 @@ +/* + * MAX9768 AMP driver + * + * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. + * based on lm4857.c by Lars-Peter Clausen et al. + * + * 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; version 2 of the License. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/gpio.h> + +#include <sound/core.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <sound/max9768.h> + +/* The register offsets in the cache array */ +#define MAX9768_VOL 0 +#define MAX9768_CTRL 3 + +/* Commands */ +#define MAX9768_CTRL_PWM 0x15 +#define MAX9768_CTRL_FILTERLESS 0x16 + +struct max9768 { + struct i2c_client *client; + int mute_gpio; + int shdn_gpio; + u32 flags; +}; + +static const uint8_t max9768_default_regs[] = { + 0x00, 0x00, 0x00, MAX9768_CTRL_FILTERLESS, +}; + +static int max9768_write(struct snd_soc_codec *codec, unsigned int reg, + unsigned int value) +{ + uint8_t data; + int ret; + + ret = snd_soc_cache_write(codec, reg, value); + if (ret < 0) + return ret; + + data = (reg << 6) | value; + ret = i2c_smbus_write_byte(codec->control_data, data); + if (ret) + dev_err(codec->dev, "Failed to write register: %d\n", ret); + + return ret; +} + +static unsigned int max9768_read(struct snd_soc_codec *codec, + unsigned int reg) +{ + unsigned int val; + int ret; + + ret = snd_soc_cache_read(codec, reg, &val); + + return ret ?: val; +} + + +static int max9768_get_gpio(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); + int val = gpio_get_value_cansleep(max9768->mute_gpio); + + ucontrol->value.integer.value[0] = !val; + + return 0; +} + +static int max9768_set_gpio(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); + + gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]); + + return 0; +} + +static const unsigned int volume_tlv[] = { + TLV_DB_RANGE_HEAD(43), + 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0), + 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0), + 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0), + 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0), + 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0), + 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0), + 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0), + 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0), + 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0), + 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0), + 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0), + 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0), + 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0), + 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0), + 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0), + 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0), + 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0), + 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0), + 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0), + 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0), + 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0), + 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0), + 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0), + 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0), + 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0), + 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0), + 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0), + 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0), + 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0), + 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0), + 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0), + 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0), + 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0), + 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0), + 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0), + 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0), + 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0), + 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0), + 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0), + 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0), + 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0), + 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0), + 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0), +}; + +static const struct snd_kcontrol_new max9768_volume[] = { + SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv), +}; + +static const struct snd_kcontrol_new max9768_mute[] = { + SOC_SINGLE_BOOL_EXT("Mute Switch", 0, max9768_get_gpio, max9768_set_gpio), +}; + +static int max9768_probe(struct snd_soc_codec *codec) +{ + struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); + int ret; + + codec->control_data = max9768->client; + + if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { + ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM); + if (ret) + return ret; + } + + ret = snd_soc_add_controls(codec, max9768_volume, + ARRAY_SIZE(max9768_volume)); + if (ret) + return ret; + + if (max9768->mute_gpio >= 0) { + ret = snd_soc_add_controls(codec, max9768_mute, + ARRAY_SIZE(max9768_mute)); + if (ret) + return ret; + } + + return 0; +} + +static struct snd_soc_codec_driver soc_codec_dev_max9768 = { + .write = max9768_write, + .read = max9768_read, + .probe = max9768_probe, + .reg_cache_size = ARRAY_SIZE(max9768_default_regs), + .reg_word_size = sizeof(uint8_t), + .reg_cache_default = max9768_default_regs, +}; + +static int __devinit max9768_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max9768 *max9768; + struct max9768_pdata *pdata = client->dev.platform_data; + int err; + + max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL); + if (!max9768) + return -ENOMEM; + + if (pdata) { + /* Mute on powerup to avoid clicks */ + err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute"); + max9768->mute_gpio = err ?: pdata->mute_gpio; + + /* Activate chip, enabling I2C */ + err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown"); + max9768->shdn_gpio = err ?: pdata->shdn_gpio; + + max9768->flags = pdata->flags; + } else { + max9768->shdn_gpio = -EINVAL; + max9768->mute_gpio = -EINVAL; + } + + max9768->client = client; + i2c_set_clientdata(client, max9768); + + return snd_soc_register_codec(&client->dev, &soc_codec_dev_max9768, NULL, 0); +} + +static int __devexit max9768_i2c_remove(struct i2c_client *client) +{ + snd_soc_unregister_codec(&client->dev); + return 0; +} + +static const struct i2c_device_id max9768_i2c_id[] = { + { "max9768", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max9768_i2c_id); + +static struct i2c_driver max9768_i2c_driver = { + .driver = { + .name = "max9768", + .owner = THIS_MODULE, + }, + .probe = max9768_i2c_probe, + .remove = __devexit_p(max9768_i2c_remove), + .id_table = max9768_i2c_id, +}; +module_i2c_driver(max9768_i2c_driver); + +MODULE_AUTHOR("Wolfram Sang w.sang@pengutronix.de"); +MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver"); +MODULE_LICENSE("GPL v2");