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ASoC: MAX9877: add MAX9877 amp driver
The MAX9877 combines a high-efficiency Class D audio power amplifier with a stereo Class AB capacitor-less DirectDrive headphone amplifier. The max9877_add_controls() is called to register the MAX9877 specific controls on machine specific init() of the machine driver. The datasheet for the MAX9877 can find at the following url: http://datasheets.maxim-ic.com/en/ds/MAX9877.pdf [Slight edit to sort the ALL_CODECS entries -- broonie.] Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,270 @@ | ||
| /* | ||
| * 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. | ||
| * | ||
| */ | ||
|
|
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| #include <linux/module.h> | ||
| #include <linux/init.h> | ||
| #include <linux/i2c.h> | ||
| #include <sound/soc.h> | ||
| #include <sound/tlv.h> | ||
|
|
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| #include "max9877.h" | ||
|
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| static struct i2c_client *i2c; | ||
|
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| static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 }; | ||
|
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| static void max9877_write_regs(void) | ||
| { | ||
| if (i2c_master_send(i2c, max9877_regs, 5) != 5) | ||
| dev_err(&i2c->dev, "i2c write failed\n"); | ||
| } | ||
|
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| static int max9877_get_reg(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| struct soc_mixer_control *mc = | ||
| (struct soc_mixer_control *)kcontrol->private_value; | ||
| int reg = mc->reg; | ||
| int reg2 = mc->rreg; | ||
| int shift = mc->shift; | ||
| int mask = mc->max; | ||
|
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| ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask; | ||
|
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| if (reg2) | ||
| ucontrol->value.integer.value[1] = | ||
| (max9877_regs[reg2] >> shift) & mask; | ||
|
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| return 0; | ||
| } | ||
|
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| static int max9877_set_reg(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| struct soc_mixer_control *mc = | ||
| (struct soc_mixer_control *)kcontrol->private_value; | ||
| int reg = mc->reg; | ||
| int reg2 = mc->rreg; | ||
| int shift = mc->shift; | ||
| int mask = mc->max; | ||
| int change = 1; | ||
| int change2 = 1; | ||
| int ret = 0; | ||
|
|
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| if (((max9877_regs[reg] >> shift) & mask) == | ||
| ucontrol->value.integer.value[0]) | ||
| change = 0; | ||
|
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| if (reg2) | ||
| if (((max9877_regs[reg2] >> shift) & mask) == | ||
| ucontrol->value.integer.value[1]) | ||
| change2 = 0; | ||
|
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||
| if (change) { | ||
| max9877_regs[reg] &= ~(mask << shift); | ||
| max9877_regs[reg] |= ucontrol->value.integer.value[0] << shift; | ||
| ret = change; | ||
| } | ||
|
|
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| if (reg2 && change2) { | ||
| max9877_regs[reg2] &= ~(mask << shift); | ||
| max9877_regs[reg2] |= ucontrol->value.integer.value[1] << shift; | ||
| ret = change2; | ||
| } | ||
|
|
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| if (ret) | ||
| max9877_write_regs(); | ||
|
|
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| return ret; | ||
| } | ||
|
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| static int max9877_get_out_mode(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| u8 value = max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK; | ||
|
|
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| if (value) | ||
| value -= 1; | ||
|
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| ucontrol->value.integer.value[0] = value; | ||
| return 0; | ||
| } | ||
|
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| static int max9877_set_out_mode(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| u8 value = ucontrol->value.integer.value[0]; | ||
|
|
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| if (value) | ||
| value += 1; | ||
|
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| if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value) | ||
| return 0; | ||
|
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| max9877_regs[MAX9877_OUTPUT_MODE] |= value; | ||
| max9877_write_regs(); | ||
| return 1; | ||
| } | ||
|
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| static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| u8 value = (max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK); | ||
|
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| value = value >> MAX9877_OSC_OFFSET; | ||
|
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| ucontrol->value.integer.value[0] = value; | ||
| return 0; | ||
| } | ||
|
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| static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol, | ||
| struct snd_ctl_elem_value *ucontrol) | ||
| { | ||
| u8 value = ucontrol->value.integer.value[0]; | ||
|
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| value = value << MAX9877_OSC_OFFSET; | ||
| if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value) | ||
| return 0; | ||
|
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| max9877_regs[MAX9877_OUTPUT_MODE] |= value; | ||
| max9877_write_regs(); | ||
| return 1; | ||
| } | ||
|
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| 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), | ||
| }; | ||
|
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| 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), | ||
| }; | ||
|
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| 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", | ||
| }; | ||
|
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| static const char *max9877_osc_mode[] = { | ||
| "1176KHz", | ||
| "1100KHz", | ||
| "700KHz", | ||
| }; | ||
|
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| static const struct soc_enum max9877_enum[] = { | ||
| SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode), | ||
| SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode), | ||
| }; | ||
|
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| static const struct snd_kcontrol_new max9877_controls[] = { | ||
| SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume", | ||
| MAX9877_INPUT_MODE, 0, 2, 0, | ||
| max9877_get_reg, max9877_set_reg, max9877_pgain_tlv), | ||
| SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume", | ||
| MAX9877_INPUT_MODE, 2, 2, 0, | ||
| max9877_get_reg, max9877_set_reg, max9877_pgain_tlv), | ||
| SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume", | ||
| MAX9877_SPK_VOLUME, 0, 31, 0, | ||
| max9877_get_reg, max9877_set_reg, max9877_output_tlv), | ||
| SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume", | ||
| MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0, | ||
| max9877_get_reg, max9877_set_reg, max9877_output_tlv), | ||
| SOC_SINGLE_EXT("MAX9877 INB Stereo Switch", | ||
| MAX9877_INPUT_MODE, 4, 1, 1, | ||
| max9877_get_reg, max9877_set_reg), | ||
| SOC_SINGLE_EXT("MAX9877 INA Stereo Switch", | ||
| MAX9877_INPUT_MODE, 5, 1, 1, | ||
| max9877_get_reg, max9877_set_reg), | ||
| SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch", | ||
| MAX9877_INPUT_MODE, 6, 1, 0, | ||
| max9877_get_reg, max9877_set_reg), | ||
| SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch", | ||
| MAX9877_OUTPUT_MODE, 6, 1, 0, | ||
| max9877_get_reg, max9877_set_reg), | ||
| SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch", | ||
| MAX9877_OUTPUT_MODE, 7, 1, 1, | ||
| max9877_get_reg, max9877_set_reg), | ||
| SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0], | ||
| max9877_get_out_mode, max9877_set_out_mode), | ||
| SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1], | ||
| max9877_get_osc_mode, max9877_set_osc_mode), | ||
| }; | ||
|
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| /* This function is called from ASoC machine driver */ | ||
| int max9877_add_controls(struct snd_soc_codec *codec) | ||
| { | ||
| return snd_soc_add_controls(codec, max9877_controls, | ||
| ARRAY_SIZE(max9877_controls)); | ||
| } | ||
| EXPORT_SYMBOL_GPL(max9877_add_controls); | ||
|
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| static int __devinit max9877_i2c_probe(struct i2c_client *client, | ||
| const struct i2c_device_id *id) | ||
| { | ||
| i2c = client; | ||
|
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| max9877_write_regs(); | ||
|
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| return 0; | ||
| } | ||
|
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| static __devexit int max9877_i2c_remove(struct i2c_client *client) | ||
| { | ||
| i2c = NULL; | ||
|
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| return 0; | ||
| } | ||
|
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| static const struct i2c_device_id max9877_i2c_id[] = { | ||
| { "max9877", 0 }, | ||
| { } | ||
| }; | ||
| MODULE_DEVICE_TABLE(i2c, max9877_i2c_id); | ||
|
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| static struct i2c_driver max9877_i2c_driver = { | ||
| .driver = { | ||
| .name = "max9877", | ||
| .owner = THIS_MODULE, | ||
| }, | ||
| .probe = max9877_i2c_probe, | ||
| .remove = __devexit_p(max9877_i2c_remove), | ||
| .id_table = max9877_i2c_id, | ||
| }; | ||
|
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| static int __init max9877_init(void) | ||
| { | ||
| return i2c_add_driver(&max9877_i2c_driver); | ||
| } | ||
| module_init(max9877_init); | ||
|
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| static void __exit max9877_exit(void) | ||
| { | ||
| i2c_del_driver(&max9877_i2c_driver); | ||
| } | ||
| module_exit(max9877_exit); | ||
|
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| MODULE_DESCRIPTION("ASoC MAX9877 amp driver"); | ||
| MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | ||
| MODULE_LICENSE("GPL"); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| /* | ||
| * max9877.h -- 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. | ||
| * | ||
| */ | ||
|
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| #ifndef _MAX9877_H | ||
| #define _MAX9877_H | ||
|
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| #define MAX9877_INPUT_MODE 0x00 | ||
| #define MAX9877_SPK_VOLUME 0x01 | ||
| #define MAX9877_HPL_VOLUME 0x02 | ||
| #define MAX9877_HPR_VOLUME 0x03 | ||
| #define MAX9877_OUTPUT_MODE 0x04 | ||
|
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| /* MAX9877_INPUT_MODE */ | ||
| #define MAX9877_INB (1 << 4) | ||
| #define MAX9877_INA (1 << 5) | ||
| #define MAX9877_ZCD (1 << 6) | ||
|
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| /* MAX9877_OUTPUT_MODE */ | ||
| #define MAX9877_OUTMODE_MASK (15 << 0) | ||
| #define MAX9877_OSC_MASK (3 << 4) | ||
| #define MAX9877_OSC_OFFSET 4 | ||
| #define MAX9877_BYPASS (1 << 6) | ||
| #define MAX9877_SHDN (1 << 7) | ||
|
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| extern int max9877_add_controls(struct snd_soc_codec *codec); | ||
|
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| #endif |