diff options
Diffstat (limited to 'kernel/sound/soc/codecs/max9877.c')
| -rw-r--r-- | kernel/sound/soc/codecs/max9877.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/kernel/sound/soc/codecs/max9877.c b/kernel/sound/soc/codecs/max9877.c new file mode 100644 index 000000000..29549cdbf --- /dev/null +++ b/kernel/sound/soc/codecs/max9877.c @@ -0,0 +1,188 @@ +/* + * max9877.c -- amp driver for max9877 + * + * Copyright (C) 2009 Samsung Electronics Co.Ltd + * Author: Joonyoung Shim <jy0922.shim@samsung.com> + * + * 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; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <sound/soc.h> +#include <sound/tlv.h> + +#include "max9877.h" + +static struct regmap *regmap; + +static struct reg_default max9877_regs[] = { + { 0, 0x40 }, + { 1, 0x00 }, + { 2, 0x00 }, + { 3, 0x00 }, + { 4, 0x49 }, +}; + +static const unsigned int max9877_pgain_tlv[] = { + TLV_DB_RANGE_HEAD(2), + 0, 1, TLV_DB_SCALE_ITEM(0, 900, 0), + 2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0), +}; + +static const unsigned int max9877_output_tlv[] = { + TLV_DB_RANGE_HEAD(4), + 0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1), + 8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0), + 16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0), + 24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0), +}; + +static const char *max9877_out_mode[] = { + "INA -> SPK", + "INA -> HP", + "INA -> SPK and HP", + "INB -> SPK", + "INB -> HP", + "INB -> SPK and HP", + "INA + INB -> SPK", + "INA + INB -> HP", + "INA + INB -> SPK and HP", +}; + +static const char *max9877_osc_mode[] = { + "1176KHz", + "1100KHz", + "700KHz", +}; + +static const struct soc_enum max9877_enum[] = { + SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode), + max9877_out_mode), + SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET, + ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode), +}; + +static const struct snd_kcontrol_new max9877_controls[] = { + SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume", + MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv), + SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume", + MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv), + SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume", + MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv), + SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume", + MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0, + max9877_output_tlv), + SOC_SINGLE("MAX9877 INB Stereo Switch", + MAX9877_INPUT_MODE, 4, 1, 1), + SOC_SINGLE("MAX9877 INA Stereo Switch", + MAX9877_INPUT_MODE, 5, 1, 1), + SOC_SINGLE("MAX9877 Zero-crossing detection Switch", + MAX9877_INPUT_MODE, 6, 1, 0), + SOC_SINGLE("MAX9877 Bypass Mode Switch", + MAX9877_OUTPUT_MODE, 6, 1, 0), + SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]), + SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]), +}; + +static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = { +SND_SOC_DAPM_INPUT("INA1"), +SND_SOC_DAPM_INPUT("INA2"), +SND_SOC_DAPM_INPUT("INB1"), +SND_SOC_DAPM_INPUT("INB2"), +SND_SOC_DAPM_INPUT("RXIN+"), +SND_SOC_DAPM_INPUT("RXIN-"), + +SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0), + +SND_SOC_DAPM_OUTPUT("OUT+"), +SND_SOC_DAPM_OUTPUT("OUT-"), +SND_SOC_DAPM_OUTPUT("HPL"), +SND_SOC_DAPM_OUTPUT("HPR"), +}; + +static const struct snd_soc_dapm_route max9877_dapm_routes[] = { + { "SHDN", NULL, "INA1" }, + { "SHDN", NULL, "INA2" }, + { "SHDN", NULL, "INB1" }, + { "SHDN", NULL, "INB2" }, + + { "OUT+", NULL, "RXIN+" }, + { "OUT+", NULL, "SHDN" }, + + { "OUT-", NULL, "SHDN" }, + { "OUT-", NULL, "RXIN-" }, + + { "HPL", NULL, "SHDN" }, + { "HPR", NULL, "SHDN" }, +}; + +static const struct snd_soc_codec_driver max9877_codec = { + .controls = max9877_controls, + .num_controls = ARRAY_SIZE(max9877_controls), + + .dapm_widgets = max9877_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets), + .dapm_routes = max9877_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes), +}; + +static const struct regmap_config max9877_regmap = { + .reg_bits = 8, + .val_bits = 8, + + .reg_defaults = max9877_regs, + .num_reg_defaults = ARRAY_SIZE(max9877_regs), + .cache_type = REGCACHE_RBTREE, +}; + +static int max9877_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int i; + + regmap = devm_regmap_init_i2c(client, &max9877_regmap); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + /* Ensure the device is in reset state */ + for (i = 0; i < ARRAY_SIZE(max9877_regs); i++) + regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def); + + return snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0); +} + +static int max9877_i2c_remove(struct i2c_client *client) +{ + snd_soc_unregister_codec(&client->dev); + + return 0; +} + +static const struct i2c_device_id max9877_i2c_id[] = { + { "max9877", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max9877_i2c_id); + +static struct i2c_driver max9877_i2c_driver = { + .driver = { + .name = "max9877", + .owner = THIS_MODULE, + }, + .probe = max9877_i2c_probe, + .remove = max9877_i2c_remove, + .id_table = max9877_i2c_id, +}; + +module_i2c_driver(max9877_i2c_driver); + +MODULE_DESCRIPTION("ASoC MAX9877 amp driver"); +MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); +MODULE_LICENSE("GPL"); |