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

Signed-off-by: Joonyoung Shim jy0922.shim@samsung.com --- Hi,

I added amp driver in codec directory of ASoC. This is because of mail about amp driver the past. http://www.spinics.net/lists/alsa-devel/msg24876.html

Please review, thank you.

sound/soc/codecs/Kconfig | 4 + sound/soc/codecs/Makefile | 6 + sound/soc/codecs/max9877.c | 246 ++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/max9877.h | 37 +++++++ 4 files changed, 293 insertions(+), 0 deletions(-) create mode 100644 sound/soc/codecs/max9877.c create mode 100644 sound/soc/codecs/max9877.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index b674d3a..8930557 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -188,3 +188,7 @@ config SND_SOC_WM9712

config SND_SOC_WM9713 tristate + +# Amp +config SND_SOC_MAX9877 + tristate diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 301eb08..cf111c9 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -38,6 +38,9 @@ snd-soc-wm9705-objs := wm9705.o snd-soc-wm9712-objs := wm9712.o snd-soc-wm9713-objs := wm9713.o

+# Amp +snd-soc-max9877-objs := max9877.o + obj-$(CONFIG_SND_SOC_AC97_CODEC) += snd-soc-ac97.o obj-$(CONFIG_SND_SOC_AD1980) += snd-soc-ad1980.o obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o @@ -77,3 +80,6 @@ obj-$(CONFIG_SND_SOC_WM9081) += snd-soc-wm9081.o obj-$(CONFIG_SND_SOC_WM9705) += snd-soc-wm9705.o obj-$(CONFIG_SND_SOC_WM9712) += snd-soc-wm9712.o obj-$(CONFIG_SND_SOC_WM9713) += snd-soc-wm9713.o + +# Amp +obj-$(CONFIG_SND_SOC_MAX9877) += snd-soc-max9877.o diff --git a/sound/soc/codecs/max9877.c b/sound/soc/codecs/max9877.c new file mode 100644 index 0000000..cb79fe8 --- /dev/null +++ b/sound/soc/codecs/max9877.c @@ -0,0 +1,246 @@ +/* + * 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 <sound/soc.h> +#include <sound/tlv.h> + +#include "max9877.h" + +static struct i2c_client *i2c; + +static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 }; + +static void max9877_write_regs(void) +{ + if (i2c_master_send(i2c, max9877_regs, 5) != 5) + dev_err(&i2c->dev, "i2c write failed\n"); +} + +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 shift = mc->shift; + int mask = mc->max; + + ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask; + + return 0; +} + +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 shift = mc->shift; + int mask = mc->max; + + if (((max9877_regs[reg] >> shift) & mask) == + ucontrol->value.integer.value[0]) + return 0; + + max9877_regs[reg] &= ~(mask << shift); + max9877_regs[reg] |= ucontrol->value.integer.value[0] << shift; + max9877_write_regs(); + return 1; +} + +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; + + if (value) + value -= 1; + + ucontrol->value.integer.value[0] = value; + return 0; +} + +static int max9877_set_out_mode(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + u8 value = ucontrol->value.integer.value[0]; + + if (value) + value += 1; + + if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value) + return 0; + + max9877_regs[MAX9877_OUTPUT_MODE] |= value; + max9877_write_regs(); + return 1; +} + +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); + + value = value >> MAX9877_OSC_OFFSET; + + ucontrol->value.integer.value[0] = value; + return 0; +} + +static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + u8 value = ucontrol->value.integer.value[0]; + + value = value << MAX9877_OSC_OFFSET; + if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value) + return 0; + + max9877_regs[MAX9877_OUTPUT_MODE] |= value; + max9877_write_regs(); + return 1; +} + +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_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode), + SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode), +}; + +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_SINGLE_EXT_TLV("MAX9877 Amp HP Left Playback Volume", + MAX9877_HPL_VOLUME, 0, 31, 0, + max9877_get_reg, max9877_set_reg, max9877_output_tlv), + SOC_SINGLE_EXT_TLV("MAX9877 Amp HP Right Playback 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), +}; + +/* 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)); +} + +static int __devinit max9877_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + i2c = client; + + max9877_write_regs(); + + return 0; +} + +static __devexit int max9877_i2c_remove(struct i2c_client *client) +{ + i2c = NULL; + + 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 = __devexit_p(max9877_i2c_remove), + .id_table = max9877_i2c_id, +}; + +static int __init max9877_init(void) +{ + return i2c_add_driver(&max9877_i2c_driver); +} +module_init(max9877_init); + +static void __exit max9877_exit(void) +{ + i2c_del_driver(&max9877_i2c_driver); +} +module_exit(max9877_exit); + +MODULE_DESCRIPTION("ASoC MAX9877 amp driver"); +MODULE_AUTHOR("Joonyoung Shim jy0922.shim@samsung.com"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/codecs/max9877.h b/sound/soc/codecs/max9877.h new file mode 100644 index 0000000..6da7229 --- /dev/null +++ b/sound/soc/codecs/max9877.h @@ -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. + * + */ + +#ifndef _MAX9877_H +#define _MAX9877_H + +#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 + +/* MAX9877_INPUT_MODE */ +#define MAX9877_INB (1 << 4) +#define MAX9877_INA (1 << 5) +#define MAX9877_ZCD (1 << 6) + +/* 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) + +extern int max9877_add_controls(struct snd_soc_codec *codec); + +#endif