Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * MAX9768 AMP driver |
| 3 | * |
| 4 | * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; version 2 of the License. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/i2c.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/gpio.h> |
| 16 | #include <linux/regmap.h> |
| 17 | |
| 18 | #include <sound/core.h> |
| 19 | #include <sound/soc.h> |
| 20 | #include <sound/tlv.h> |
| 21 | #include <sound/max9768.h> |
| 22 | |
| 23 | /* "Registers" */ |
| 24 | #define MAX9768_VOL 0 |
| 25 | #define MAX9768_CTRL 3 |
| 26 | |
| 27 | /* Commands */ |
| 28 | #define MAX9768_CTRL_PWM 0x15 |
| 29 | #define MAX9768_CTRL_FILTERLESS 0x16 |
| 30 | |
| 31 | struct max9768 { |
| 32 | struct regmap *regmap; |
| 33 | int mute_gpio; |
| 34 | int shdn_gpio; |
| 35 | u32 flags; |
| 36 | }; |
| 37 | |
| 38 | static struct reg_default max9768_default_regs[] = { |
| 39 | { 0, 0 }, |
| 40 | { 3, MAX9768_CTRL_FILTERLESS}, |
| 41 | }; |
| 42 | |
| 43 | static int max9768_get_gpio(struct snd_kcontrol *kcontrol, |
| 44 | struct snd_ctl_elem_value *ucontrol) |
| 45 | { |
| 46 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 47 | struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); |
| 48 | int val = gpio_get_value_cansleep(max9768->mute_gpio); |
| 49 | |
| 50 | ucontrol->value.integer.value[0] = !val; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static int max9768_set_gpio(struct snd_kcontrol *kcontrol, |
| 56 | struct snd_ctl_elem_value *ucontrol) |
| 57 | { |
| 58 | struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); |
| 59 | struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); |
| 60 | |
| 61 | gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]); |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | static const unsigned int volume_tlv[] = { |
| 67 | TLV_DB_RANGE_HEAD(43), |
| 68 | 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0), |
| 69 | 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0), |
| 70 | 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0), |
| 71 | 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0), |
| 72 | 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0), |
| 73 | 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0), |
| 74 | 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0), |
| 75 | 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0), |
| 76 | 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0), |
| 77 | 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0), |
| 78 | 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0), |
| 79 | 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0), |
| 80 | 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0), |
| 81 | 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0), |
| 82 | 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0), |
| 83 | 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0), |
| 84 | 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0), |
| 85 | 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0), |
| 86 | 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0), |
| 87 | 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0), |
| 88 | 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0), |
| 89 | 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0), |
| 90 | 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0), |
| 91 | 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0), |
| 92 | 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0), |
| 93 | 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0), |
| 94 | 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0), |
| 95 | 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0), |
| 96 | 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0), |
| 97 | 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0), |
| 98 | 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0), |
| 99 | 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0), |
| 100 | 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0), |
| 101 | 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0), |
| 102 | 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0), |
| 103 | 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0), |
| 104 | 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0), |
| 105 | 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0), |
| 106 | 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0), |
| 107 | 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0), |
| 108 | 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0), |
| 109 | 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0), |
| 110 | 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0), |
| 111 | }; |
| 112 | |
| 113 | static const struct snd_kcontrol_new max9768_volume[] = { |
| 114 | SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv), |
| 115 | }; |
| 116 | |
| 117 | static const struct snd_kcontrol_new max9768_mute[] = { |
Mark Brown | 69edea8 | 2012-01-30 21:51:45 +0000 | [diff] [blame] | 118 | SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio), |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 119 | }; |
| 120 | |
| 121 | static int max9768_probe(struct snd_soc_codec *codec) |
| 122 | { |
| 123 | struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec); |
| 124 | int ret; |
| 125 | |
| 126 | codec->control_data = max9768->regmap; |
| 127 | ret = snd_soc_codec_set_cache_io(codec, 2, 6, SND_SOC_REGMAP); |
| 128 | if (ret) |
| 129 | return ret; |
| 130 | |
| 131 | if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { |
| 132 | ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM); |
| 133 | if (ret) |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | if (gpio_is_valid(max9768->mute_gpio)) { |
Liam Girdwood | 14ac911 | 2012-02-06 16:50:58 +0000 | [diff] [blame] | 138 | ret = snd_soc_add_codec_controls(codec, max9768_mute, |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 139 | ARRAY_SIZE(max9768_mute)); |
| 140 | if (ret) |
| 141 | return ret; |
| 142 | } |
| 143 | |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static struct snd_soc_codec_driver max9768_codec_driver = { |
| 148 | .probe = max9768_probe, |
| 149 | .controls = max9768_volume, |
| 150 | .num_controls = ARRAY_SIZE(max9768_volume), |
| 151 | }; |
| 152 | |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 153 | static const struct regmap_config max9768_i2c_regmap_config = { |
| 154 | .reg_bits = 2, |
| 155 | .val_bits = 6, |
| 156 | .max_register = 3, |
| 157 | .reg_defaults = max9768_default_regs, |
| 158 | .num_reg_defaults = ARRAY_SIZE(max9768_default_regs), |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 159 | .cache_type = REGCACHE_RBTREE, |
| 160 | }; |
| 161 | |
| 162 | static int __devinit max9768_i2c_probe(struct i2c_client *client, |
| 163 | const struct i2c_device_id *id) |
| 164 | { |
| 165 | struct max9768 *max9768; |
| 166 | struct max9768_pdata *pdata = client->dev.platform_data; |
| 167 | int err; |
| 168 | |
| 169 | max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL); |
| 170 | if (!max9768) |
| 171 | return -ENOMEM; |
| 172 | |
| 173 | if (pdata) { |
| 174 | /* Mute on powerup to avoid clicks */ |
| 175 | err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute"); |
| 176 | max9768->mute_gpio = err ?: pdata->mute_gpio; |
| 177 | |
| 178 | /* Activate chip by releasing shutdown, enables I2C */ |
| 179 | err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown"); |
| 180 | max9768->shdn_gpio = err ?: pdata->shdn_gpio; |
| 181 | |
| 182 | max9768->flags = pdata->flags; |
| 183 | } else { |
| 184 | max9768->shdn_gpio = -EINVAL; |
| 185 | max9768->mute_gpio = -EINVAL; |
| 186 | } |
| 187 | |
| 188 | i2c_set_clientdata(client, max9768); |
| 189 | |
Sachin Kamat | 8f255e7 | 2012-11-26 17:19:41 +0530 | [diff] [blame] | 190 | max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 191 | if (IS_ERR(max9768->regmap)) { |
| 192 | err = PTR_ERR(max9768->regmap); |
| 193 | goto err_gpio_free; |
| 194 | } |
| 195 | |
| 196 | err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0); |
| 197 | if (err) |
Sachin Kamat | 8f255e7 | 2012-11-26 17:19:41 +0530 | [diff] [blame] | 198 | goto err_gpio_free; |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 199 | |
| 200 | return 0; |
| 201 | |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 202 | err_gpio_free: |
| 203 | if (gpio_is_valid(max9768->shdn_gpio)) |
| 204 | gpio_free(max9768->shdn_gpio); |
| 205 | if (gpio_is_valid(max9768->mute_gpio)) |
| 206 | gpio_free(max9768->mute_gpio); |
| 207 | |
| 208 | return err; |
| 209 | } |
| 210 | |
| 211 | static int __devexit max9768_i2c_remove(struct i2c_client *client) |
| 212 | { |
| 213 | struct max9768 *max9768 = i2c_get_clientdata(client); |
| 214 | |
| 215 | snd_soc_unregister_codec(&client->dev); |
Wolfram Sang | 394d2bb | 2012-01-27 16:10:23 +0100 | [diff] [blame] | 216 | |
| 217 | if (gpio_is_valid(max9768->shdn_gpio)) |
| 218 | gpio_free(max9768->shdn_gpio); |
| 219 | if (gpio_is_valid(max9768->mute_gpio)) |
| 220 | gpio_free(max9768->mute_gpio); |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static const struct i2c_device_id max9768_i2c_id[] = { |
| 226 | { "max9768", 0 }, |
| 227 | { } |
| 228 | }; |
| 229 | MODULE_DEVICE_TABLE(i2c, max9768_i2c_id); |
| 230 | |
| 231 | static struct i2c_driver max9768_i2c_driver = { |
| 232 | .driver = { |
| 233 | .name = "max9768", |
| 234 | .owner = THIS_MODULE, |
| 235 | }, |
| 236 | .probe = max9768_i2c_probe, |
| 237 | .remove = __devexit_p(max9768_i2c_remove), |
| 238 | .id_table = max9768_i2c_id, |
| 239 | }; |
| 240 | module_i2c_driver(max9768_i2c_driver); |
| 241 | |
| 242 | MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); |
| 243 | MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver"); |
| 244 | MODULE_LICENSE("GPL v2"); |