| /* |
| * MAX9768 AMP driver |
| * |
| * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. |
| * |
| * 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 <linux/regmap.h> |
| |
| #include <sound/core.h> |
| #include <sound/soc.h> |
| #include <sound/tlv.h> |
| #include <sound/max9768.h> |
| |
| /* "Registers" */ |
| #define MAX9768_VOL 0 |
| #define MAX9768_CTRL 3 |
| |
| /* Commands */ |
| #define MAX9768_CTRL_PWM 0x15 |
| #define MAX9768_CTRL_FILTERLESS 0x16 |
| |
| struct max9768 { |
| struct regmap *regmap; |
| int mute_gpio; |
| int shdn_gpio; |
| u32 flags; |
| }; |
| |
| static struct reg_default max9768_default_regs[] = { |
| { 0, 0 }, |
| { 3, MAX9768_CTRL_FILTERLESS}, |
| }; |
| |
| 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("Playback 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->regmap; |
| ret = snd_soc_codec_set_cache_io(codec, 2, 6, SND_SOC_REGMAP); |
| if (ret) |
| return ret; |
| |
| if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { |
| ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM); |
| if (ret) |
| return ret; |
| } |
| |
| if (gpio_is_valid(max9768->mute_gpio)) { |
| ret = snd_soc_add_codec_controls(codec, max9768_mute, |
| ARRAY_SIZE(max9768_mute)); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static struct snd_soc_codec_driver max9768_codec_driver = { |
| .probe = max9768_probe, |
| .controls = max9768_volume, |
| .num_controls = ARRAY_SIZE(max9768_volume), |
| }; |
| |
| static const struct regmap_config max9768_i2c_regmap_config = { |
| .reg_bits = 2, |
| .val_bits = 6, |
| .max_register = 3, |
| .reg_defaults = max9768_default_regs, |
| .num_reg_defaults = ARRAY_SIZE(max9768_default_regs), |
| .cache_type = REGCACHE_RBTREE, |
| }; |
| |
| 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 by releasing shutdown, enables 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; |
| } |
| |
| i2c_set_clientdata(client, max9768); |
| |
| max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); |
| if (IS_ERR(max9768->regmap)) { |
| err = PTR_ERR(max9768->regmap); |
| goto err_gpio_free; |
| } |
| |
| err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0); |
| if (err) |
| goto err_gpio_free; |
| |
| return 0; |
| |
| err_gpio_free: |
| if (gpio_is_valid(max9768->shdn_gpio)) |
| gpio_free(max9768->shdn_gpio); |
| if (gpio_is_valid(max9768->mute_gpio)) |
| gpio_free(max9768->mute_gpio); |
| |
| return err; |
| } |
| |
| static int __devexit max9768_i2c_remove(struct i2c_client *client) |
| { |
| struct max9768 *max9768 = i2c_get_clientdata(client); |
| |
| snd_soc_unregister_codec(&client->dev); |
| |
| if (gpio_is_valid(max9768->shdn_gpio)) |
| gpio_free(max9768->shdn_gpio); |
| if (gpio_is_valid(max9768->mute_gpio)) |
| gpio_free(max9768->mute_gpio); |
| |
| 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"); |