sound/soc/codecs/max9877.c

   1 /*
   2  * max9877.c  --  amp driver for max9877
   3  *
   4  * Copyright (C) 2009 Samsung Electronics Co.Ltd
   5  * Author: Joonyoung Shim <jy0922.shim@samsung.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/i2c.h>
  17 #include <sound/soc.h>
  18 #include <sound/tlv.h>
  19
  20 #include "max9877.h"
  21
  22 static struct i2c_client *i2c;
  23
  24 static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 };
  25
  26 static void max9877_write_regs(void)
  27 {
  28         unsigned int i;
  29         u8 data[6];
  30
  31         data[0] = MAX9877_INPUT_MODE;
  32         for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
  33                 data[i + 1] = max9877_regs[i];
  34
  35         if (i2c_master_send(i2c, data, 6) != 6)
  36                 dev_err(&i2c->dev, "i2c write failed\n");
  37 }
  38
  39 static int max9877_get_reg(struct snd_kcontrol *kcontrol,
  40                 struct snd_ctl_elem_value *ucontrol)
  41 {
  42         struct soc_mixer_control *mc =
  43                 (struct soc_mixer_control *)kcontrol->private_value;
  44         unsigned int reg = mc->reg;
  45         unsigned int shift = mc->shift;
  46         unsigned int mask = mc->max;
  47         unsigned int invert = mc->invert;
  48
  49         ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
  50
  51         if (invert)
  52                 ucontrol->value.integer.value[0] =
  53                         mask - ucontrol->value.integer.value[0];
  54
  55         return 0;
  56 }
  57
  58 static int max9877_set_reg(struct snd_kcontrol *kcontrol,
  59                 struct snd_ctl_elem_value *ucontrol)
  60 {
  61         struct soc_mixer_control *mc =
  62                 (struct soc_mixer_control *)kcontrol->private_value;
  63         unsigned int reg = mc->reg;
  64         unsigned int shift = mc->shift;
  65         unsigned int mask = mc->max;
  66         unsigned int invert = mc->invert;
  67         unsigned int val = (ucontrol->value.integer.value[0] & mask);
  68
  69         if (invert)
  70                 val = mask - val;
  71
  72         if (((max9877_regs[reg] >> shift) & mask) == val)
  73                 return 0;
  74
  75         max9877_regs[reg] &= ~(mask << shift);
  76         max9877_regs[reg] |= val << shift;
  77         max9877_write_regs();
  78
  79         return 1;
  80 }
  81
  82 static int max9877_get_2reg(struct snd_kcontrol *kcontrol,
  83                 struct snd_ctl_elem_value *ucontrol)
  84 {
  85         struct soc_mixer_control *mc =
  86                 (struct soc_mixer_control *)kcontrol->private_value;
  87         unsigned int reg = mc->reg;
  88         unsigned int reg2 = mc->rreg;
  89         unsigned int shift = mc->shift;
  90         unsigned int mask = mc->max;
  91
  92         ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
  93         ucontrol->value.integer.value[1] = (max9877_regs[reg2] >> shift) & mask;
  94
  95         return 0;
  96 }
  97
  98 static int max9877_set_2reg(struct snd_kcontrol *kcontrol,
  99                 struct snd_ctl_elem_value *ucontrol)
 100 {
 101         struct soc_mixer_control *mc =
 102                 (struct soc_mixer_control *)kcontrol->private_value;
 103         unsigned int reg = mc->reg;
 104         unsigned int reg2 = mc->rreg;
 105         unsigned int shift = mc->shift;
 106         unsigned int mask = mc->max;
 107         unsigned int val = (ucontrol->value.integer.value[0] & mask);
 108         unsigned int val2 = (ucontrol->value.integer.value[1] & mask);
 109         unsigned int change = 0;
 110
 111         if (((max9877_regs[reg] >> shift) & mask) != val)
 112                 change = 1;
 113
 114         if (((max9877_regs[reg2] >> shift) & mask) != val2)
 115                 change = 1;
 116
 117         if (change) {
 118                 max9877_regs[reg] &= ~(mask << shift);
 119                 max9877_regs[reg] |= val << shift;
 120                 max9877_regs[reg2] &= ~(mask << shift);
 121                 max9877_regs[reg2] |= val2 << shift;
 122                 max9877_write_regs();
 123         }
 124
 125         return change;
 126 }
 127
 128 static int max9877_get_out_mode(struct snd_kcontrol *kcontrol,
 129                 struct snd_ctl_elem_value *ucontrol)
 130 {
 131         u8 value = max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK;
 132
 133         if (value)
 134                 value -= 1;
 135
 136         ucontrol->value.integer.value[0] = value;
 137         return 0;
 138 }
 139
 140 static int max9877_set_out_mode(struct snd_kcontrol *kcontrol,
 141                 struct snd_ctl_elem_value *ucontrol)
 142 {
 143         u8 value = ucontrol->value.integer.value[0];
 144
 145         value += 1;
 146
 147         if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value)
 148                 return 0;
 149
 150         max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OUTMODE_MASK;
 151         max9877_regs[MAX9877_OUTPUT_MODE] |= value;
 152         max9877_write_regs();
 153         return 1;
 154 }
 155
 156 static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol,
 157                 struct snd_ctl_elem_value *ucontrol)
 158 {
 159         u8 value = (max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK);
 160
 161         value = value >> MAX9877_OSC_OFFSET;
 162
 163         ucontrol->value.integer.value[0] = value;
 164         return 0;
 165 }
 166
 167 static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol,
 168                 struct snd_ctl_elem_value *ucontrol)
 169 {
 170         u8 value = ucontrol->value.integer.value[0];
 171
 172         value = value << MAX9877_OSC_OFFSET;
 173         if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value)
 174                 return 0;
 175
 176         max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OSC_MASK;
 177         max9877_regs[MAX9877_OUTPUT_MODE] |= value;
 178         max9877_write_regs();
 179         return 1;
 180 }
 181
 182 static const unsigned int max9877_pgain_tlv[] = {
 183         TLV_DB_RANGE_HEAD(2),
 184         0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
 185         2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
 186 };
 187
 188 static const unsigned int max9877_output_tlv[] = {
 189         TLV_DB_RANGE_HEAD(4),
 190         0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
 191         8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
 192         16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
 193         24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
 194 };
 195
 196 static const char *max9877_out_mode[] = {
 197         "INA -> SPK",
 198         "INA -> HP",
 199         "INA -> SPK and HP",
 200         "INB -> SPK",
 201         "INB -> HP",
 202         "INB -> SPK and HP",
 203         "INA + INB -> SPK",
 204         "INA + INB -> HP",
 205         "INA + INB -> SPK and HP",
 206 };
 207
 208 static const char *max9877_osc_mode[] = {
 209         "1176KHz",
 210         "1100KHz",
 211         "700KHz",
 212 };
 213
 214 static const struct soc_enum max9877_enum[] = {
 215         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode),
 216         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
 217 };
 218
 219 static const struct snd_kcontrol_new max9877_controls[] = {
 220         SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume",
 221                         MAX9877_INPUT_MODE, 0, 2, 0,
 222                         max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
 223         SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume",
 224                         MAX9877_INPUT_MODE, 2, 2, 0,
 225                         max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
 226         SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume",
 227                         MAX9877_SPK_VOLUME, 0, 31, 0,
 228                         max9877_get_reg, max9877_set_reg, max9877_output_tlv),
 229         SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume",
 230                         MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
 231                         max9877_get_2reg, max9877_set_2reg, max9877_output_tlv),
 232         SOC_SINGLE_EXT("MAX9877 INB Stereo Switch",
 233                         MAX9877_INPUT_MODE, 4, 1, 1,
 234                         max9877_get_reg, max9877_set_reg),
 235         SOC_SINGLE_EXT("MAX9877 INA Stereo Switch",
 236                         MAX9877_INPUT_MODE, 5, 1, 1,
 237                         max9877_get_reg, max9877_set_reg),
 238         SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch",
 239                         MAX9877_INPUT_MODE, 6, 1, 0,
 240                         max9877_get_reg, max9877_set_reg),
 241         SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch",
 242                         MAX9877_OUTPUT_MODE, 6, 1, 0,
 243                         max9877_get_reg, max9877_set_reg),
 244         SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch",
 245                         MAX9877_OUTPUT_MODE, 7, 1, 1,
 246                         max9877_get_reg, max9877_set_reg),
 247         SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0],
 248                         max9877_get_out_mode, max9877_set_out_mode),
 249         SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1],
 250                         max9877_get_osc_mode, max9877_set_osc_mode),
 251 };
 252
 253 /* This function is called from ASoC machine driver */
 254 int max9877_add_controls(struct snd_soc_codec *codec)
 255 {
 256         return snd_soc_add_codec_controls(codec, max9877_controls,
 257                         ARRAY_SIZE(max9877_controls));
 258 }
 259 EXPORT_SYMBOL_GPL(max9877_add_controls);
 260
 261 static int __devinit max9877_i2c_probe(struct i2c_client *client,
 262                 const struct i2c_device_id *id)
 263 {
 264         i2c = client;
 265
 266         max9877_write_regs();
 267
 268         return 0;
 269 }
 270
 271 static __devexit int max9877_i2c_remove(struct i2c_client *client)
 272 {
 273         i2c = NULL;
 274
 275         return 0;
 276 }
 277
 278 static const struct i2c_device_id max9877_i2c_id[] = {
 279         { "max9877", 0 },
 280         { }
 281 };
 282 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
 283
 284 static struct i2c_driver max9877_i2c_driver = {
 285         .driver = {
 286                 .name = "max9877",
 287                 .owner = THIS_MODULE,
 288         },
 289         .probe = max9877_i2c_probe,
 290         .remove = __devexit_p(max9877_i2c_remove),
 291         .id_table = max9877_i2c_id,
 292 };
 293
 294 static int __init max9877_init(void)
 295 {
 296         return i2c_add_driver(&max9877_i2c_driver);
 297 }
 298 module_init(max9877_init);
 299
 300 static void __exit max9877_exit(void)
 301 {
 302         i2c_del_driver(&max9877_i2c_driver);
 303 }
 304 module_exit(max9877_exit);
 305
 306 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
 307 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 308 MODULE_LICENSE("GPL");