1394d2bbaSWolfram Sang /* 2394d2bbaSWolfram Sang * MAX9768 AMP driver 3394d2bbaSWolfram Sang * 4394d2bbaSWolfram Sang * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. 5394d2bbaSWolfram Sang * 6394d2bbaSWolfram Sang * This program is free software; you can redistribute it and/or modify it 7394d2bbaSWolfram Sang * under the terms of the GNU General Public License as published by the 8394d2bbaSWolfram Sang * Free Software Foundation; version 2 of the License. 9394d2bbaSWolfram Sang */ 10394d2bbaSWolfram Sang 11394d2bbaSWolfram Sang #include <linux/init.h> 12394d2bbaSWolfram Sang #include <linux/module.h> 13394d2bbaSWolfram Sang #include <linux/i2c.h> 14394d2bbaSWolfram Sang #include <linux/slab.h> 15394d2bbaSWolfram Sang #include <linux/gpio.h> 16394d2bbaSWolfram Sang #include <linux/regmap.h> 17394d2bbaSWolfram Sang 18394d2bbaSWolfram Sang #include <sound/core.h> 19394d2bbaSWolfram Sang #include <sound/soc.h> 20394d2bbaSWolfram Sang #include <sound/tlv.h> 21394d2bbaSWolfram Sang #include <sound/max9768.h> 22394d2bbaSWolfram Sang 23394d2bbaSWolfram Sang /* "Registers" */ 24394d2bbaSWolfram Sang #define MAX9768_VOL 0 25394d2bbaSWolfram Sang #define MAX9768_CTRL 3 26394d2bbaSWolfram Sang 27394d2bbaSWolfram Sang /* Commands */ 28394d2bbaSWolfram Sang #define MAX9768_CTRL_PWM 0x15 29394d2bbaSWolfram Sang #define MAX9768_CTRL_FILTERLESS 0x16 30394d2bbaSWolfram Sang 31394d2bbaSWolfram Sang struct max9768 { 32394d2bbaSWolfram Sang struct regmap *regmap; 33394d2bbaSWolfram Sang int mute_gpio; 34394d2bbaSWolfram Sang int shdn_gpio; 35394d2bbaSWolfram Sang u32 flags; 36394d2bbaSWolfram Sang }; 37394d2bbaSWolfram Sang 38394d2bbaSWolfram Sang static struct reg_default max9768_default_regs[] = { 39394d2bbaSWolfram Sang { 0, 0 }, 40394d2bbaSWolfram Sang { 3, MAX9768_CTRL_FILTERLESS}, 41394d2bbaSWolfram Sang }; 42394d2bbaSWolfram Sang 43394d2bbaSWolfram Sang static int max9768_get_gpio(struct snd_kcontrol *kcontrol, 44394d2bbaSWolfram Sang struct snd_ctl_elem_value *ucontrol) 45394d2bbaSWolfram Sang { 46ea53bf77SLars-Peter Clausen struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 47394d2bbaSWolfram Sang struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); 48394d2bbaSWolfram Sang int val = gpio_get_value_cansleep(max9768->mute_gpio); 49394d2bbaSWolfram Sang 50394d2bbaSWolfram Sang ucontrol->value.integer.value[0] = !val; 51394d2bbaSWolfram Sang 52394d2bbaSWolfram Sang return 0; 53394d2bbaSWolfram Sang } 54394d2bbaSWolfram Sang 55394d2bbaSWolfram Sang static int max9768_set_gpio(struct snd_kcontrol *kcontrol, 56394d2bbaSWolfram Sang struct snd_ctl_elem_value *ucontrol) 57394d2bbaSWolfram Sang { 58ea53bf77SLars-Peter Clausen struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 59394d2bbaSWolfram Sang struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); 60394d2bbaSWolfram Sang 61394d2bbaSWolfram Sang gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]); 62394d2bbaSWolfram Sang 63394d2bbaSWolfram Sang return 0; 64394d2bbaSWolfram Sang } 65394d2bbaSWolfram Sang 66394d2bbaSWolfram Sang static const unsigned int volume_tlv[] = { 67394d2bbaSWolfram Sang TLV_DB_RANGE_HEAD(43), 68394d2bbaSWolfram Sang 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0), 69394d2bbaSWolfram Sang 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0), 70394d2bbaSWolfram Sang 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0), 71394d2bbaSWolfram Sang 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0), 72394d2bbaSWolfram Sang 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0), 73394d2bbaSWolfram Sang 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0), 74394d2bbaSWolfram Sang 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0), 75394d2bbaSWolfram Sang 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0), 76394d2bbaSWolfram Sang 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0), 77394d2bbaSWolfram Sang 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0), 78394d2bbaSWolfram Sang 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0), 79394d2bbaSWolfram Sang 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0), 80394d2bbaSWolfram Sang 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0), 81394d2bbaSWolfram Sang 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0), 82394d2bbaSWolfram Sang 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0), 83394d2bbaSWolfram Sang 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0), 84394d2bbaSWolfram Sang 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0), 85394d2bbaSWolfram Sang 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0), 86394d2bbaSWolfram Sang 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0), 87394d2bbaSWolfram Sang 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0), 88394d2bbaSWolfram Sang 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0), 89394d2bbaSWolfram Sang 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0), 90394d2bbaSWolfram Sang 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0), 91394d2bbaSWolfram Sang 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0), 92394d2bbaSWolfram Sang 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0), 93394d2bbaSWolfram Sang 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0), 94394d2bbaSWolfram Sang 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0), 95394d2bbaSWolfram Sang 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0), 96394d2bbaSWolfram Sang 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0), 97394d2bbaSWolfram Sang 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0), 98394d2bbaSWolfram Sang 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0), 99394d2bbaSWolfram Sang 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0), 100394d2bbaSWolfram Sang 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0), 101394d2bbaSWolfram Sang 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0), 102394d2bbaSWolfram Sang 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0), 103394d2bbaSWolfram Sang 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0), 104394d2bbaSWolfram Sang 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0), 105394d2bbaSWolfram Sang 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0), 106394d2bbaSWolfram Sang 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0), 107394d2bbaSWolfram Sang 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0), 108394d2bbaSWolfram Sang 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0), 109394d2bbaSWolfram Sang 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0), 110394d2bbaSWolfram Sang 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0), 111394d2bbaSWolfram Sang }; 112394d2bbaSWolfram Sang 113394d2bbaSWolfram Sang static const struct snd_kcontrol_new max9768_volume[] = { 114394d2bbaSWolfram Sang SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv), 115394d2bbaSWolfram Sang }; 116394d2bbaSWolfram Sang 117394d2bbaSWolfram Sang static const struct snd_kcontrol_new max9768_mute[] = { 11869edea8aSMark Brown SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio), 119394d2bbaSWolfram Sang }; 120394d2bbaSWolfram Sang 121439fe8a7SMark Brown static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = { 122439fe8a7SMark Brown SND_SOC_DAPM_INPUT("IN"), 123439fe8a7SMark Brown 124439fe8a7SMark Brown SND_SOC_DAPM_OUTPUT("OUT+"), 125439fe8a7SMark Brown SND_SOC_DAPM_OUTPUT("OUT-"), 126439fe8a7SMark Brown }; 127439fe8a7SMark Brown 128439fe8a7SMark Brown static const struct snd_soc_dapm_route max9768_dapm_routes[] = { 129439fe8a7SMark Brown { "OUT+", NULL, "IN" }, 130439fe8a7SMark Brown { "OUT-", NULL, "IN" }, 131439fe8a7SMark Brown }; 132439fe8a7SMark Brown 133394d2bbaSWolfram Sang static int max9768_probe(struct snd_soc_codec *codec) 134394d2bbaSWolfram Sang { 135394d2bbaSWolfram Sang struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); 136394d2bbaSWolfram Sang int ret; 137394d2bbaSWolfram Sang 138394d2bbaSWolfram Sang if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { 139394d2bbaSWolfram Sang ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM); 140394d2bbaSWolfram Sang if (ret) 141394d2bbaSWolfram Sang return ret; 142394d2bbaSWolfram Sang } 143394d2bbaSWolfram Sang 144394d2bbaSWolfram Sang if (gpio_is_valid(max9768->mute_gpio)) { 14514ac9112SLiam Girdwood ret = snd_soc_add_codec_controls(codec, max9768_mute, 146394d2bbaSWolfram Sang ARRAY_SIZE(max9768_mute)); 147394d2bbaSWolfram Sang if (ret) 148394d2bbaSWolfram Sang return ret; 149394d2bbaSWolfram Sang } 150394d2bbaSWolfram Sang 151394d2bbaSWolfram Sang return 0; 152394d2bbaSWolfram Sang } 153394d2bbaSWolfram Sang 154394d2bbaSWolfram Sang static struct snd_soc_codec_driver max9768_codec_driver = { 155394d2bbaSWolfram Sang .probe = max9768_probe, 156394d2bbaSWolfram Sang .controls = max9768_volume, 157394d2bbaSWolfram Sang .num_controls = ARRAY_SIZE(max9768_volume), 158439fe8a7SMark Brown .dapm_widgets = max9768_dapm_widgets, 159439fe8a7SMark Brown .num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets), 160439fe8a7SMark Brown .dapm_routes = max9768_dapm_routes, 161439fe8a7SMark Brown .num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes), 162394d2bbaSWolfram Sang }; 163394d2bbaSWolfram Sang 164394d2bbaSWolfram Sang static const struct regmap_config max9768_i2c_regmap_config = { 165394d2bbaSWolfram Sang .reg_bits = 2, 166394d2bbaSWolfram Sang .val_bits = 6, 167394d2bbaSWolfram Sang .max_register = 3, 168394d2bbaSWolfram Sang .reg_defaults = max9768_default_regs, 169394d2bbaSWolfram Sang .num_reg_defaults = ARRAY_SIZE(max9768_default_regs), 170394d2bbaSWolfram Sang .cache_type = REGCACHE_RBTREE, 171394d2bbaSWolfram Sang }; 172394d2bbaSWolfram Sang 1737a79e94eSBill Pemberton static int max9768_i2c_probe(struct i2c_client *client, 174394d2bbaSWolfram Sang const struct i2c_device_id *id) 175394d2bbaSWolfram Sang { 176394d2bbaSWolfram Sang struct max9768 *max9768; 177394d2bbaSWolfram Sang struct max9768_pdata *pdata = client->dev.platform_data; 178394d2bbaSWolfram Sang int err; 179394d2bbaSWolfram Sang 180394d2bbaSWolfram Sang max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL); 181394d2bbaSWolfram Sang if (!max9768) 182394d2bbaSWolfram Sang return -ENOMEM; 183394d2bbaSWolfram Sang 184394d2bbaSWolfram Sang if (pdata) { 185394d2bbaSWolfram Sang /* Mute on powerup to avoid clicks */ 186*d79cca1aSLars-Peter Clausen err = devm_gpio_request_one(&client->dev, pdata->mute_gpio, 187*d79cca1aSLars-Peter Clausen GPIOF_INIT_HIGH, "MAX9768 Mute"); 188394d2bbaSWolfram Sang max9768->mute_gpio = err ?: pdata->mute_gpio; 189394d2bbaSWolfram Sang 190394d2bbaSWolfram Sang /* Activate chip by releasing shutdown, enables I2C */ 191*d79cca1aSLars-Peter Clausen err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio, 192*d79cca1aSLars-Peter Clausen GPIOF_INIT_HIGH, "MAX9768 Shutdown"); 193394d2bbaSWolfram Sang max9768->shdn_gpio = err ?: pdata->shdn_gpio; 194394d2bbaSWolfram Sang 195394d2bbaSWolfram Sang max9768->flags = pdata->flags; 196394d2bbaSWolfram Sang } else { 197394d2bbaSWolfram Sang max9768->shdn_gpio = -EINVAL; 198394d2bbaSWolfram Sang max9768->mute_gpio = -EINVAL; 199394d2bbaSWolfram Sang } 200394d2bbaSWolfram Sang 201394d2bbaSWolfram Sang i2c_set_clientdata(client, max9768); 202394d2bbaSWolfram Sang 2038f255e7bSSachin Kamat max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); 204*d79cca1aSLars-Peter Clausen if (IS_ERR(max9768->regmap)) 205*d79cca1aSLars-Peter Clausen return PTR_ERR(max9768->regmap); 206394d2bbaSWolfram Sang 207*d79cca1aSLars-Peter Clausen return snd_soc_register_codec(&client->dev, &max9768_codec_driver, 208*d79cca1aSLars-Peter Clausen NULL, 0); 209394d2bbaSWolfram Sang } 210394d2bbaSWolfram Sang 2117a79e94eSBill Pemberton static int max9768_i2c_remove(struct i2c_client *client) 212394d2bbaSWolfram Sang { 213394d2bbaSWolfram Sang snd_soc_unregister_codec(&client->dev); 214394d2bbaSWolfram Sang 215394d2bbaSWolfram Sang return 0; 216394d2bbaSWolfram Sang } 217394d2bbaSWolfram Sang 218394d2bbaSWolfram Sang static const struct i2c_device_id max9768_i2c_id[] = { 219394d2bbaSWolfram Sang { "max9768", 0 }, 220394d2bbaSWolfram Sang { } 221394d2bbaSWolfram Sang }; 222394d2bbaSWolfram Sang MODULE_DEVICE_TABLE(i2c, max9768_i2c_id); 223394d2bbaSWolfram Sang 224394d2bbaSWolfram Sang static struct i2c_driver max9768_i2c_driver = { 225394d2bbaSWolfram Sang .driver = { 226394d2bbaSWolfram Sang .name = "max9768", 227394d2bbaSWolfram Sang }, 228394d2bbaSWolfram Sang .probe = max9768_i2c_probe, 2297a79e94eSBill Pemberton .remove = max9768_i2c_remove, 230394d2bbaSWolfram Sang .id_table = max9768_i2c_id, 231394d2bbaSWolfram Sang }; 232394d2bbaSWolfram Sang module_i2c_driver(max9768_i2c_driver); 233394d2bbaSWolfram Sang 234394d2bbaSWolfram Sang MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); 235394d2bbaSWolfram Sang MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver"); 236394d2bbaSWolfram Sang MODULE_LICENSE("GPL v2"); 237