/* * max9877.c -- amp driver for max9877 * * Copyright (C) 2009 Samsung Electronics Co.Ltd * Author: Joonyoung Shim * * 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 #include #include #include #include #include "max9877.h" static struct i2c_client *i2c; static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 }; static void max9877_write_regs(void) { unsigned int i; u8 data[6]; data[0] = MAX9877_INPUT_MODE; for (i = 0; i < ARRAY_SIZE(max9877_regs); i++) data[i + 1] = max9877_regs[i]; if (i2c_master_send(i2c, data, 6) != 6) 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; unsigned int reg = mc->reg; unsigned int shift = mc->shift; unsigned int mask = mc->max; unsigned int invert = mc->invert; ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask; if (invert) ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0]; 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; unsigned int reg = mc->reg; unsigned int shift = mc->shift; unsigned int mask = mc->max; unsigned int invert = mc->invert; unsigned int val = (ucontrol->value.integer.value[0] & mask); if (invert) val = mask - val; if (((max9877_regs[reg] >> shift) & mask) == val) return 0; max9877_regs[reg] &= ~(mask << shift); max9877_regs[reg] |= val << shift; max9877_write_regs(); return 1; } static int max9877_get_2reg(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; unsigned int reg = mc->reg; unsigned int reg2 = mc->rreg; unsigned int shift = mc->shift; unsigned int mask = mc->max; ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask; ucontrol->value.integer.value[1] = (max9877_regs[reg2] >> shift) & mask; return 0; } static int max9877_set_2reg(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value; unsigned int reg = mc->reg; unsigned int reg2 = mc->rreg; unsigned int shift = mc->shift; unsigned int mask = mc->max; unsigned int val = (ucontrol->value.integer.value[0] & mask); unsigned int val2 = (ucontrol->value.integer.value[1] & mask); unsigned int change = 1; if (((max9877_regs[reg] >> shift) & mask) == val) change = 0; if (((max9877_regs[reg2] >> shift) & mask) == val2) change = 0; if (change) { max9877_regs[reg] &= ~(mask << shift); max9877_regs[reg] |= val << shift; max9877_regs[reg2] &= ~(mask << shift); max9877_regs[reg2] |= val2 << shift; max9877_write_regs(); } return change; } 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]; value += 1; if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value) return 0; max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OUTMODE_MASK; 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] &= ~MAX9877_OSC_MASK; 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_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume", MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0, max9877_get_2reg, max9877_set_2reg, 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)); } EXPORT_SYMBOL_GPL(max9877_add_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 "); MODULE_LICENSE("GPL");