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225 lines
6.2 KiB
225 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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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#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 const 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_component *c = snd_soc_kcontrol_component(kcontrol); |
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struct max9768 *max9768 = snd_soc_component_get_drvdata(c); |
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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_component *c = snd_soc_kcontrol_component(kcontrol); |
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struct max9768 *max9768 = snd_soc_component_get_drvdata(c); |
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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 DECLARE_TLV_DB_RANGE(volume_tlv, |
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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("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio), |
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}; |
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static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("IN"), |
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SND_SOC_DAPM_OUTPUT("OUT+"), |
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SND_SOC_DAPM_OUTPUT("OUT-"), |
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}; |
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static const struct snd_soc_dapm_route max9768_dapm_routes[] = { |
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{ "OUT+", NULL, "IN" }, |
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{ "OUT-", NULL, "IN" }, |
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}; |
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static int max9768_probe(struct snd_soc_component *component) |
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{ |
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struct max9768 *max9768 = snd_soc_component_get_drvdata(component); |
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int ret; |
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if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { |
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ret = regmap_write(max9768->regmap, MAX9768_CTRL, |
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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_component_controls(component, 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 const struct snd_soc_component_driver max9768_component_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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.dapm_widgets = max9768_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets), |
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.dapm_routes = max9768_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes), |
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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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.cache_type = REGCACHE_RBTREE, |
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}; |
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static int 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 = devm_gpio_request_one(&client->dev, pdata->mute_gpio, |
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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 = devm_gpio_request_one(&client->dev, pdata->shdn_gpio, |
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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 = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); |
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if (IS_ERR(max9768->regmap)) |
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return PTR_ERR(max9768->regmap); |
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return devm_snd_soc_register_component(&client->dev, |
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&max9768_component_driver, NULL, 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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}, |
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.probe = max9768_i2c_probe, |
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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 <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver"); |
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MODULE_LICENSE("GPL v2");
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