ASoC: max9768: add driver for max9768 amplifier
Add a driver supporting the volume control and the mute pin. Shdn pin and DAPM are not taken care of yet. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Wolfram Sang
Mark Brown
parent
ffa8d9df55
commit
394d2bbae3
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@ -0,0 +1,24 @@
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/*
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* Platform data for MAX9768
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* Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
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* same licence as the driver
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*/
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#ifndef __SOUND_MAX9768_PDATA_H__
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#define __SOUND_MAX9768_PDATA_H__
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/**
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* struct max9768_pdata - optional platform specific MAX9768 configuration
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* @shdn_gpio: GPIO to SHDN pin. If not valid, pin must be hardwired HIGH
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* @mute_gpio: GPIO to MUTE pin. If not valid, control for mute won't be added
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* @flags: configuration flags, e.g. set classic PWM mode (check datasheet
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* regarding "filterless modulation" which is default).
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*/
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struct max9768_pdata {
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int shdn_gpio;
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int mute_gpio;
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unsigned flags;
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#define MAX9768_FLAG_CLASSIC_PWM (1 << 0)
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};
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#endif /* __SOUND_MAX9768_PDATA_H__*/
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@ -40,6 +40,7 @@ config SND_SOC_ALL_CODECS
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select SND_SOC_MAX98088 if I2C
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select SND_SOC_MAX98095 if I2C
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select SND_SOC_MAX9850 if I2C
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select SND_SOC_MAX9768 if I2C
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select SND_SOC_MAX9877 if I2C
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select SND_SOC_PCM3008
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select SND_SOC_RT5631 if I2C
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@ -429,6 +430,9 @@ config SND_SOC_WM9713
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config SND_SOC_LM4857
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tristate
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config SND_SOC_MAX9768
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tristate
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config SND_SOC_MAX9877
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tristate
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@ -25,6 +25,7 @@ snd-soc-dmic-objs := dmic.o
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snd-soc-jz4740-codec-objs := jz4740.o
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snd-soc-l3-objs := l3.o
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snd-soc-lm4857-objs := lm4857.o
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snd-soc-max9768-objs := max9768.o
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snd-soc-max98088-objs := max98088.o
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snd-soc-max98095-objs := max98095.o
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snd-soc-max9850-objs := max9850.o
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@ -130,6 +131,7 @@ obj-$(CONFIG_SND_SOC_DMIC) += snd-soc-dmic.o
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obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o
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obj-$(CONFIG_SND_SOC_LM4857) += snd-soc-lm4857.o
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obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o
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obj-$(CONFIG_SND_SOC_MAX9768) += snd-soc-max9768.o
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obj-$(CONFIG_SND_SOC_MAX98088) += snd-soc-max98088.o
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obj-$(CONFIG_SND_SOC_MAX98095) += snd-soc-max98095.o
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obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o
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@ -0,0 +1,253 @@
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/*
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* MAX9768 AMP driver
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*
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* Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/regmap.h>
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#include <sound/core.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#include <sound/max9768.h>
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/* "Registers" */
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#define MAX9768_VOL 0
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#define MAX9768_CTRL 3
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/* Commands */
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#define MAX9768_CTRL_PWM 0x15
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#define MAX9768_CTRL_FILTERLESS 0x16
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struct max9768 {
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struct regmap *regmap;
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int mute_gpio;
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int shdn_gpio;
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u32 flags;
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};
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static struct reg_default max9768_default_regs[] = {
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{ 0, 0 },
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{ 3, MAX9768_CTRL_FILTERLESS},
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};
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static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
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int val = gpio_get_value_cansleep(max9768->mute_gpio);
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ucontrol->value.integer.value[0] = !val;
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return 0;
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}
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static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
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gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);
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return 0;
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}
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static const unsigned int volume_tlv[] = {
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TLV_DB_RANGE_HEAD(43),
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0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
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1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
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2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
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3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
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4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
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5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
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6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
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7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
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8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
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9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
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10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
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11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
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12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
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13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
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14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
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15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
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18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
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19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
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20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
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21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
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22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
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23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
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24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
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25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
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26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
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27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
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28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
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31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
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32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
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35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
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38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
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40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
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41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
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42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
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43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
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44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
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45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
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46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
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47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
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51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
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58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
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59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
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63, 63, TLV_DB_SCALE_ITEM(950, 0, 0),
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};
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static const struct snd_kcontrol_new max9768_volume[] = {
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SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
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};
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static const struct snd_kcontrol_new max9768_mute[] = {
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SOC_SINGLE_BOOL_EXT("Mute Switch", 0, max9768_get_gpio, max9768_set_gpio),
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};
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static int max9768_probe(struct snd_soc_codec *codec)
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{
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struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
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int ret;
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codec->control_data = max9768->regmap;
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ret = snd_soc_codec_set_cache_io(codec, 2, 6, SND_SOC_REGMAP);
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if (ret)
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return ret;
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if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
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ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM);
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if (ret)
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return ret;
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}
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if (gpio_is_valid(max9768->mute_gpio)) {
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ret = snd_soc_add_controls(codec, max9768_mute,
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ARRAY_SIZE(max9768_mute));
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if (ret)
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return ret;
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}
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return 0;
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}
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static struct snd_soc_codec_driver max9768_codec_driver = {
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.probe = max9768_probe,
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.controls = max9768_volume,
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.num_controls = ARRAY_SIZE(max9768_volume),
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};
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static bool max9768_always_false(struct device *dev, unsigned int reg)
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{
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return false;
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}
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static const struct regmap_config max9768_i2c_regmap_config = {
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.reg_bits = 2,
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.val_bits = 6,
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.max_register = 3,
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.reg_defaults = max9768_default_regs,
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.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
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.volatile_reg = max9768_always_false,
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.cache_type = REGCACHE_RBTREE,
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};
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static int __devinit max9768_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct max9768 *max9768;
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struct max9768_pdata *pdata = client->dev.platform_data;
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int err;
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max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
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if (!max9768)
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return -ENOMEM;
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if (pdata) {
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/* Mute on powerup to avoid clicks */
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err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute");
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max9768->mute_gpio = err ?: pdata->mute_gpio;
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/* Activate chip by releasing shutdown, enables I2C */
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err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown");
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max9768->shdn_gpio = err ?: pdata->shdn_gpio;
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max9768->flags = pdata->flags;
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} else {
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max9768->shdn_gpio = -EINVAL;
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max9768->mute_gpio = -EINVAL;
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}
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i2c_set_clientdata(client, max9768);
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max9768->regmap = regmap_init_i2c(client, &max9768_i2c_regmap_config);
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if (IS_ERR(max9768->regmap)) {
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err = PTR_ERR(max9768->regmap);
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goto err_gpio_free;
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}
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err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0);
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if (err)
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goto err_regmap_free;
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return 0;
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err_regmap_free:
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regmap_exit(max9768->regmap);
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err_gpio_free:
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if (gpio_is_valid(max9768->shdn_gpio))
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gpio_free(max9768->shdn_gpio);
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if (gpio_is_valid(max9768->mute_gpio))
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gpio_free(max9768->mute_gpio);
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return err;
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}
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static int __devexit max9768_i2c_remove(struct i2c_client *client)
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{
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struct max9768 *max9768 = i2c_get_clientdata(client);
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snd_soc_unregister_codec(&client->dev);
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regmap_exit(max9768->regmap);
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if (gpio_is_valid(max9768->shdn_gpio))
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gpio_free(max9768->shdn_gpio);
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if (gpio_is_valid(max9768->mute_gpio))
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gpio_free(max9768->mute_gpio);
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return 0;
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}
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static const struct i2c_device_id max9768_i2c_id[] = {
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{ "max9768", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
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static struct i2c_driver max9768_i2c_driver = {
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.driver = {
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.name = "max9768",
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.owner = THIS_MODULE,
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},
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.probe = max9768_i2c_probe,
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.remove = __devexit_p(max9768_i2c_remove),
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.id_table = max9768_i2c_id,
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};
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module_i2c_driver(max9768_i2c_driver);
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MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
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MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
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MODULE_LICENSE("GPL v2");
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