sound/soc/s3c24xx/neo1973_wm8753.c

   1 /*
   2  * neo1973_wm8753.c  --  SoC audio for Neo1973
   3  *
   4  * Copyright 2007 Wolfson Microelectronics PLC.
   5  * Author: Graeme Gregory
   6  *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/timer.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/i2c.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/soc-dapm.h>
  25 #include <sound/tlv.h>
  26
  27 #include <asm/hardware/scoop.h>
  28 #include <mach/regs-clock.h>
  29 #include <mach/regs-gpio.h>
  30 #include <mach/hardware.h>
  31 #include <mach/audio.h>
  32 #include <linux/io.h>
  33 #include <mach/spi-gpio.h>
  34
  35 #include <asm/plat-s3c24xx/regs-iis.h>
  36
  37 #include "../codecs/wm8753.h"
  38 #include "lm4857.h"
  39 #include "s3c24xx-pcm.h"
  40 #include "s3c24xx-i2s.h"
  41
  42 /* Debugging stuff */
  43 #define S3C24XX_SOC_NEO1973_WM8753_DEBUG 0
  44 #if S3C24XX_SOC_NEO1973_WM8753_DEBUG
  45 #define DBG(x...) printk(KERN_DEBUG "s3c24xx-soc-neo1973-wm8753: " x)
  46 #else
  47 #define DBG(x...)
  48 #endif
  49
  50 /* define the scenarios */
  51 #define NEO_AUDIO_OFF                   0
  52 #define NEO_GSM_CALL_AUDIO_HANDSET      1
  53 #define NEO_GSM_CALL_AUDIO_HEADSET      2
  54 #define NEO_GSM_CALL_AUDIO_BLUETOOTH    3
  55 #define NEO_STEREO_TO_SPEAKERS          4
  56 #define NEO_STEREO_TO_HEADPHONES        5
  57 #define NEO_CAPTURE_HANDSET             6
  58 #define NEO_CAPTURE_HEADSET             7
  59 #define NEO_CAPTURE_BLUETOOTH           8
  60
  61 static struct snd_soc_machine neo1973;
  62 static struct i2c_client *i2c;
  63
  64 static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
  65         struct snd_pcm_hw_params *params)
  66 {
  67         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  68         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  69         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  70         unsigned int pll_out = 0, bclk = 0;
  71         int ret = 0;
  72         unsigned long iis_clkrate;
  73
  74         DBG("Entered %s\n", __func__);
  75
  76         iis_clkrate = s3c24xx_i2s_get_clockrate();
  77
  78         switch (params_rate(params)) {
  79         case 8000:
  80         case 16000:
  81                 pll_out = 12288000;
  82                 break;
  83         case 48000:
  84                 bclk = WM8753_BCLK_DIV_4;
  85                 pll_out = 12288000;
  86                 break;
  87         case 96000:
  88                 bclk = WM8753_BCLK_DIV_2;
  89                 pll_out = 12288000;
  90                 break;
  91         case 11025:
  92                 bclk = WM8753_BCLK_DIV_16;
  93                 pll_out = 11289600;
  94                 break;
  95         case 22050:
  96                 bclk = WM8753_BCLK_DIV_8;
  97                 pll_out = 11289600;
  98                 break;
  99         case 44100:
 100                 bclk = WM8753_BCLK_DIV_4;
 101                 pll_out = 11289600;
 102                 break;
 103         case 88200:
 104                 bclk = WM8753_BCLK_DIV_2;
 105                 pll_out = 11289600;
 106                 break;
 107         }
 108
 109         /* set codec DAI configuration */
 110         ret = snd_soc_dai_set_fmt(codec_dai,
 111                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 112                 SND_SOC_DAIFMT_CBM_CFM);
 113         if (ret < 0)
 114                 return ret;
 115
 116         /* set cpu DAI configuration */
 117         ret = snd_soc_dai_set_fmt(cpu_dai,
 118                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 119                 SND_SOC_DAIFMT_CBM_CFM);
 120         if (ret < 0)
 121                 return ret;
 122
 123         /* set the codec system clock for DAC and ADC */
 124         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
 125                 SND_SOC_CLOCK_IN);
 126         if (ret < 0)
 127                 return ret;
 128
 129         /* set MCLK division for sample rate */
 130         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 131                 S3C2410_IISMOD_32FS);
 132         if (ret < 0)
 133                 return ret;
 134
 135         /* set codec BCLK division for sample rate */
 136         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
 137         if (ret < 0)
 138                 return ret;
 139
 140         /* set prescaler division for sample rate */
 141         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 142                 S3C24XX_PRESCALE(4, 4));
 143         if (ret < 0)
 144                 return ret;
 145
 146         /* codec PLL input is PCLK/4 */
 147         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1,
 148                 iis_clkrate / 4, pll_out);
 149         if (ret < 0)
 150                 return ret;
 151
 152         return 0;
 153 }
 154
 155 static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
 156 {
 157         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 158         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 159
 160         DBG("Entered %s\n", __func__);
 161
 162         /* disable the PLL */
 163         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0);
 164 }
 165
 166 /*
 167  * Neo1973 WM8753 HiFi DAI opserations.
 168  */
 169 static struct snd_soc_ops neo1973_hifi_ops = {
 170         .hw_params = neo1973_hifi_hw_params,
 171         .hw_free = neo1973_hifi_hw_free,
 172 };
 173
 174 static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
 175         struct snd_pcm_hw_params *params)
 176 {
 177         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 178         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 179         unsigned int pcmdiv = 0;
 180         int ret = 0;
 181         unsigned long iis_clkrate;
 182
 183         DBG("Entered %s\n", __func__);
 184
 185         iis_clkrate = s3c24xx_i2s_get_clockrate();
 186
 187         if (params_rate(params) != 8000)
 188                 return -EINVAL;
 189         if (params_channels(params) != 1)
 190                 return -EINVAL;
 191
 192         pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
 193
 194         /* todo: gg check mode (DSP_B) against CSR datasheet */
 195         /* set codec DAI configuration */
 196         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
 197                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 198         if (ret < 0)
 199                 return ret;
 200
 201         /* set the codec system clock for DAC and ADC */
 202         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
 203                 SND_SOC_CLOCK_IN);
 204         if (ret < 0)
 205                 return ret;
 206
 207         /* set codec PCM division for sample rate */
 208         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
 209         if (ret < 0)
 210                 return ret;
 211
 212         /* configue and enable PLL for 12.288MHz output */
 213         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2,
 214                 iis_clkrate / 4, 12288000);
 215         if (ret < 0)
 216                 return ret;
 217
 218         return 0;
 219 }
 220
 221 static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
 222 {
 223         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 224         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 225
 226         DBG("Entered %s\n", __func__);
 227
 228         /* disable the PLL */
 229         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0);
 230 }
 231
 232 static struct snd_soc_ops neo1973_voice_ops = {
 233         .hw_params = neo1973_voice_hw_params,
 234         .hw_free = neo1973_voice_hw_free,
 235 };
 236
 237 static int neo1973_scenario;
 238
 239 static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
 240         struct snd_ctl_elem_value *ucontrol)
 241 {
 242         ucontrol->value.integer.value[0] = neo1973_scenario;
 243         return 0;
 244 }
 245
 246 static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
 247 {
 248         DBG("Entered %s\n", __func__);
 249
 250         switch (neo1973_scenario) {
 251         case NEO_AUDIO_OFF:
 252                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 253                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 254                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 255                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 256                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 257                 break;
 258         case NEO_GSM_CALL_AUDIO_HANDSET:
 259                 snd_soc_dapm_enable_pin(codec, "Audio Out");
 260                 snd_soc_dapm_enable_pin(codec, "GSM Line Out");
 261                 snd_soc_dapm_enable_pin(codec, "GSM Line In");
 262                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 263                 snd_soc_dapm_enable_pin(codec, "Call Mic");
 264                 break;
 265         case NEO_GSM_CALL_AUDIO_HEADSET:
 266                 snd_soc_dapm_enable_pin(codec, "Audio Out");
 267                 snd_soc_dapm_enable_pin(codec, "GSM Line Out");
 268                 snd_soc_dapm_enable_pin(codec, "GSM Line In");
 269                 snd_soc_dapm_enable_pin(codec, "Headset Mic");
 270                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 271                 break;
 272         case NEO_GSM_CALL_AUDIO_BLUETOOTH:
 273                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 274                 snd_soc_dapm_enable_pin(codec, "GSM Line Out");
 275                 snd_soc_dapm_enable_pin(codec, "GSM Line In");
 276                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 277                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 278                 break;
 279         case NEO_STEREO_TO_SPEAKERS:
 280                 snd_soc_dapm_enable_pin(codec, "Audio Out");
 281                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 282                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 283                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 284                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 285                 break;
 286         case NEO_STEREO_TO_HEADPHONES:
 287                 snd_soc_dapm_enable_pin(codec, "Audio Out");
 288                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 289                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 290                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 291                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 292                 break;
 293         case NEO_CAPTURE_HANDSET:
 294                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 295                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 296                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 297                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 298                 snd_soc_dapm_enable_pin(codec, "Call Mic");
 299                 break;
 300         case NEO_CAPTURE_HEADSET:
 301                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 302                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 303                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 304                 snd_soc_dapm_enable_pin(codec, "Headset Mic");
 305                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 306                 break;
 307         case NEO_CAPTURE_BLUETOOTH:
 308                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 309                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 310                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 311                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 312                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 313                 break;
 314         default:
 315                 snd_soc_dapm_disable_pin(codec, "Audio Out");
 316                 snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 317                 snd_soc_dapm_disable_pin(codec, "GSM Line In");
 318                 snd_soc_dapm_disable_pin(codec, "Headset Mic");
 319                 snd_soc_dapm_disable_pin(codec, "Call Mic");
 320         }
 321
 322         snd_soc_dapm_sync(codec);
 323
 324         return 0;
 325 }
 326
 327 static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
 328         struct snd_ctl_elem_value *ucontrol)
 329 {
 330         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 331
 332         DBG("Entered %s\n", __func__);
 333
 334         if (neo1973_scenario == ucontrol->value.integer.value[0])
 335                 return 0;
 336
 337         neo1973_scenario = ucontrol->value.integer.value[0];
 338         set_scenario_endpoints(codec, neo1973_scenario);
 339         return 1;
 340 }
 341
 342 static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
 343
 344 static void lm4857_write_regs(void)
 345 {
 346         DBG("Entered %s\n", __func__);
 347
 348         if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
 349                 printk(KERN_ERR "lm4857: i2c write failed\n");
 350 }
 351
 352 static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
 353         struct snd_ctl_elem_value *ucontrol)
 354 {
 355         int reg = kcontrol->private_value & 0xFF;
 356         int shift = (kcontrol->private_value >> 8) & 0x0F;
 357         int mask = (kcontrol->private_value >> 16) & 0xFF;
 358
 359         DBG("Entered %s\n", __func__);
 360
 361         ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
 362         return 0;
 363 }
 364
 365 static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
 366         struct snd_ctl_elem_value *ucontrol)
 367 {
 368         int reg = kcontrol->private_value & 0xFF;
 369         int shift = (kcontrol->private_value >> 8) & 0x0F;
 370         int mask = (kcontrol->private_value >> 16) & 0xFF;
 371
 372         if (((lm4857_regs[reg] >> shift) & mask) ==
 373                 ucontrol->value.integer.value[0])
 374                 return 0;
 375
 376         lm4857_regs[reg] &= ~(mask << shift);
 377         lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
 378         lm4857_write_regs();
 379         return 1;
 380 }
 381
 382 static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
 383         struct snd_ctl_elem_value *ucontrol)
 384 {
 385         u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
 386
 387         DBG("Entered %s\n", __func__);
 388
 389         if (value)
 390                 value -= 5;
 391
 392         ucontrol->value.integer.value[0] = value;
 393         return 0;
 394 }
 395
 396 static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
 397         struct snd_ctl_elem_value *ucontrol)
 398 {
 399         u8 value = ucontrol->value.integer.value[0];
 400
 401         DBG("Entered %s\n", __func__);
 402
 403         if (value)
 404                 value += 5;
 405
 406         if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
 407                 return 0;
 408
 409         lm4857_regs[LM4857_CTRL] &= 0xF0;
 410         lm4857_regs[LM4857_CTRL] |= value;
 411         lm4857_write_regs();
 412         return 1;
 413 }
 414
 415 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
 416         SND_SOC_DAPM_LINE("Audio Out", NULL),
 417         SND_SOC_DAPM_LINE("GSM Line Out", NULL),
 418         SND_SOC_DAPM_LINE("GSM Line In", NULL),
 419         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 420         SND_SOC_DAPM_MIC("Call Mic", NULL),
 421 };
 422
 423
 424 static const struct snd_soc_dapm_route dapm_routes[] = {
 425
 426         /* Connections to the lm4857 amp */
 427         {"Audio Out", NULL, "LOUT1"},
 428         {"Audio Out", NULL, "ROUT1"},
 429
 430         /* Connections to the GSM Module */
 431         {"GSM Line Out", NULL, "MONO1"},
 432         {"GSM Line Out", NULL, "MONO2"},
 433         {"RXP", NULL, "GSM Line In"},
 434         {"RXN", NULL, "GSM Line In"},
 435
 436         /* Connections to Headset */
 437         {"MIC1", NULL, "Mic Bias"},
 438         {"Mic Bias", NULL, "Headset Mic"},
 439
 440         /* Call Mic */
 441         {"MIC2", NULL, "Mic Bias"},
 442         {"MIC2N", NULL, "Mic Bias"},
 443         {"Mic Bias", NULL, "Call Mic"},
 444
 445         /* Connect the ALC pins */
 446         {"ACIN", NULL, "ACOP"},
 447 };
 448
 449 static const char *lm4857_mode[] = {
 450         "Off",
 451         "Call Speaker",
 452         "Stereo Speakers",
 453         "Stereo Speakers + Headphones",
 454         "Headphones"
 455 };
 456
 457 static const struct soc_enum lm4857_mode_enum[] = {
 458         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
 459 };
 460
 461 static const char *neo_scenarios[] = {
 462         "Off",
 463         "GSM Handset",
 464         "GSM Headset",
 465         "GSM Bluetooth",
 466         "Speakers",
 467         "Headphones",
 468         "Capture Handset",
 469         "Capture Headset",
 470         "Capture Bluetooth"
 471 };
 472
 473 static const struct soc_enum neo_scenario_enum[] = {
 474         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios), neo_scenarios),
 475 };
 476
 477 static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
 478 static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
 479
 480 static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
 481         SOC_SINGLE_EXT_TLV("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
 482                 lm4857_get_reg, lm4857_set_reg, stereo_tlv),
 483         SOC_SINGLE_EXT_TLV("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
 484                 lm4857_get_reg, lm4857_set_reg, stereo_tlv),
 485         SOC_SINGLE_EXT_TLV("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
 486                 lm4857_get_reg, lm4857_set_reg, mono_tlv),
 487         SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
 488                 lm4857_get_mode, lm4857_set_mode),
 489         SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
 490                 neo1973_get_scenario, neo1973_set_scenario),
 491         SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
 492                 lm4857_get_reg, lm4857_set_reg),
 493         SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
 494                 lm4857_get_reg, lm4857_set_reg),
 495         SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
 496                 lm4857_get_reg, lm4857_set_reg),
 497         SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
 498                 lm4857_get_reg, lm4857_set_reg),
 499 };
 500
 501 /*
 502  * This is an example machine initialisation for a wm8753 connected to a
 503  * neo1973 II. It is missing logic to detect hp/mic insertions and logic
 504  * to re-route the audio in such an event.
 505  */
 506 static int neo1973_wm8753_init(struct snd_soc_codec *codec)
 507 {
 508         int i, err;
 509
 510         DBG("Entered %s\n", __func__);
 511
 512         /* set up NC codec pins */
 513         snd_soc_dapm_disable_pin(codec, "LOUT2");
 514         snd_soc_dapm_disable_pin(codec, "ROUT2");
 515         snd_soc_dapm_disable_pin(codec, "OUT3");
 516         snd_soc_dapm_disable_pin(codec, "OUT4");
 517         snd_soc_dapm_disable_pin(codec, "LINE1");
 518         snd_soc_dapm_disable_pin(codec, "LINE2");
 519
 520
 521         /* set endpoints to default mode */
 522         set_scenario_endpoints(codec, NEO_AUDIO_OFF);
 523
 524         /* Add neo1973 specific widgets */
 525         snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
 526                                   ARRAY_SIZE(wm8753_dapm_widgets));
 527
 528         /* add neo1973 specific controls */
 529         for (i = 0; i < ARRAY_SIZE(wm8753_neo1973_controls); i++) {
 530                 err = snd_ctl_add(codec->card,
 531                                 snd_soc_cnew(&wm8753_neo1973_controls[i],
 532                                 codec, NULL));
 533                 if (err < 0)
 534                         return err;
 535         }
 536
 537         /* set up neo1973 specific audio routes */
 538         err = snd_soc_dapm_add_routes(codec, dapm_routes,
 539                                       ARRAY_SIZE(dapm_routes));
 540
 541         snd_soc_dapm_sync(codec);
 542         return 0;
 543 }
 544
 545 /*
 546  * BT Codec DAI
 547  */
 548 static struct snd_soc_dai bt_dai = {
 549         .name = "Bluetooth",
 550         .id = 0,
 551         .type = SND_SOC_DAI_PCM,
 552         .playback = {
 553                 .channels_min = 1,
 554                 .channels_max = 1,
 555                 .rates = SNDRV_PCM_RATE_8000,
 556                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 557         .capture = {
 558                 .channels_min = 1,
 559                 .channels_max = 1,
 560                 .rates = SNDRV_PCM_RATE_8000,
 561                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 562 };
 563
 564 static struct snd_soc_dai_link neo1973_dai[] = {
 565 { /* Hifi Playback - for similatious use with voice below */
 566         .name = "WM8753",
 567         .stream_name = "WM8753 HiFi",
 568         .cpu_dai = &s3c24xx_i2s_dai,
 569         .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
 570         .init = neo1973_wm8753_init,
 571         .ops = &neo1973_hifi_ops,
 572 },
 573 { /* Voice via BT */
 574         .name = "Bluetooth",
 575         .stream_name = "Voice",
 576         .cpu_dai = &bt_dai,
 577         .codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
 578         .ops = &neo1973_voice_ops,
 579 },
 580 };
 581
 582 static struct snd_soc_machine neo1973 = {
 583         .name = "neo1973",
 584         .dai_link = neo1973_dai,
 585         .num_links = ARRAY_SIZE(neo1973_dai),
 586 };
 587
 588 static struct wm8753_setup_data neo1973_wm8753_setup = {
 589         .i2c_bus = 0,
 590         .i2c_address = 0x1a,
 591 };
 592
 593 static struct snd_soc_device neo1973_snd_devdata = {
 594         .machine = &neo1973,
 595         .platform = &s3c24xx_soc_platform,
 596         .codec_dev = &soc_codec_dev_wm8753,
 597         .codec_data = &neo1973_wm8753_setup,
 598 };
 599
 600 static int lm4857_i2c_probe(struct i2c_client *client,
 601                             const struct i2c_device_id *id)
 602 {
 603         DBG("Entered %s\n", __func__);
 604
 605         lm4857_write_regs();
 606         return 0;
 607 }
 608
 609 static int lm4857_i2c_remove(struct i2c_client *client)
 610 {
 611         DBG("Entered %s\n", __func__);
 612
 613         return 0;
 614 }
 615
 616 static u8 lm4857_state;
 617
 618 static int lm4857_suspend(struct i2c_client *dev, pm_message_t state)
 619 {
 620         DBG("Entered %s\n", __func__);
 621
 622         dev_dbg(&dev->dev, "lm4857_suspend\n");
 623         lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf;
 624         if (lm4857_state) {
 625                 lm4857_regs[LM4857_CTRL] &= 0xf0;
 626                 lm4857_write_regs();
 627         }
 628         return 0;
 629 }
 630
 631 static int lm4857_resume(struct i2c_client *dev)
 632 {
 633         DBG("Entered %s\n", __func__);
 634
 635         if (lm4857_state) {
 636                 lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f);
 637                 lm4857_write_regs();
 638         }
 639         return 0;
 640 }
 641
 642 static void lm4857_shutdown(struct i2c_client *dev)
 643 {
 644         DBG("Entered %s\n", __func__);
 645
 646         dev_dbg(&dev->dev, "lm4857_shutdown\n");
 647         lm4857_regs[LM4857_CTRL] &= 0xf0;
 648         lm4857_write_regs();
 649 }
 650
 651 static const struct i2c_device_id lm4857_i2c_id[] = {
 652         { "neo1973_lm4857", 0 }
 653         { }
 654 };
 655
 656 static struct i2c_driver lm4857_i2c_driver = {
 657         .driver = {
 658                 .name = "LM4857 I2C Amp",
 659                 .owner = THIS_MODULE,
 660         },
 661         .suspend =        lm4857_suspend,
 662         .resume =         lm4857_resume,
 663         .shutdown =       lm4857_shutdown,
 664         .probe =          lm4857_i2c_probe,
 665         .remove =         lm4857_i2c_remove,
 666         .id_table =       lm4857_i2c_id,
 667 };
 668
 669 static struct platform_device *neo1973_snd_device;
 670 static struct i2c_client *lm4857_client;
 671
 672 static int __init neo1973_add_lm4857_device(struct platform_device *pdev,
 673                                             int i2c_bus,
 674                                             unsigned short i2c_address)
 675 {
 676         struct i2c_board_info info;
 677         struct i2c_adapter *adapter;
 678         struct i2c_client *client;
 679         int ret;
 680
 681         ret = i2c_add_driver(&lm4857_i2c_driver);
 682         if (ret != 0) {
 683                 dev_err(&pdev->dev, "can't add lm4857 driver\n");
 684                 return ret;
 685         }
 686
 687         memset(&info, 0, sizeof(struct i2c_board_info));
 688         info.addr = i2c_address;
 689         strlcpy(info.type, "neo1973_lm4857", I2C_NAME_SIZE);
 690
 691         adapter = i2c_get_adapter(i2c_bus);
 692         if (!adapter) {
 693                 dev_err(&pdev->dev, "can't get i2c adapter %d\n", i2c_bus);
 694                 goto err_driver;
 695         }
 696
 697         client = i2c_new_device(adapter, &info);
 698         i2c_put_adapter(adapter);
 699         if (!client) {
 700                 dev_err(&pdev->dev, "can't add lm4857 device at 0x%x\n",
 701                         (unsigned int)info.addr);
 702                 goto err_driver;
 703         }
 704
 705         lm4857_client = client;
 706         return 0;
 707
 708 err_driver:
 709         i2c_del_driver(&lm4857_i2c_driver);
 710         return -ENODEV;
 711 }
 712
 713 static int __init neo1973_init(void)
 714 {
 715         int ret;
 716
 717         DBG("Entered %s\n", __func__);
 718
 719         neo1973_snd_device = platform_device_alloc("soc-audio", -1);
 720         if (!neo1973_snd_device)
 721                 return -ENOMEM;
 722
 723         platform_set_drvdata(neo1973_snd_device, &neo1973_snd_devdata);
 724         neo1973_snd_devdata.dev = &neo1973_snd_device->dev;
 725         ret = platform_device_add(neo1973_snd_device);
 726
 727         if (ret) {
 728                 platform_device_put(neo1973_snd_device);
 729                 return ret;
 730         }
 731
 732         ret = neo1973_add_lm4857_device(neo1973_snd_device,
 733                                         neo1973_wm8753_setup, 0x7C);
 734         if (ret != 0)
 735                 platform_device_unregister(neo1973_snd_device);
 736
 737         return ret;
 738 }
 739
 740 static void __exit neo1973_exit(void)
 741 {
 742         DBG("Entered %s\n", __func__);
 743
 744         i2c_unregister_device(lm4857_client);
 745         i2c_del_driver(&lm4857_i2c_driver);
 746         platform_device_unregister(neo1973_snd_device);
 747 }
 748
 749 module_init(neo1973_init);
 750 module_exit(neo1973_exit);
 751
 752 /* Module information */
 753 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
 754 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
 755 MODULE_LICENSE("GPL");