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/mach-types.h>
  28 #include <asm/hardware/scoop.h>
  29 #include <mach/regs-clock.h>
  30 #include <mach/regs-gpio.h>
  31 #include <mach/hardware.h>
  32 #include <linux/io.h>
  33 #include <mach/spi-gpio.h>
  34
  35 #include <plat/regs-iis.h>
  36
  37 #include "../codecs/wm8753.h"
  38 #include "lm4857.h"
  39 #include "s3c-dma.h"
  40 #include "s3c24xx-i2s.h"
  41
  42 /* define the scenarios */
  43 #define NEO_AUDIO_OFF                   0
  44 #define NEO_GSM_CALL_AUDIO_HANDSET      1
  45 #define NEO_GSM_CALL_AUDIO_HEADSET      2
  46 #define NEO_GSM_CALL_AUDIO_BLUETOOTH    3
  47 #define NEO_STEREO_TO_SPEAKERS          4
  48 #define NEO_STEREO_TO_HEADPHONES        5
  49 #define NEO_CAPTURE_HANDSET             6
  50 #define NEO_CAPTURE_HEADSET             7
  51 #define NEO_CAPTURE_BLUETOOTH           8
  52
  53 static struct snd_soc_card neo1973;
  54 static struct i2c_client *i2c;
  55
  56 static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
  57         struct snd_pcm_hw_params *params)
  58 {
  59         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  60         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  61         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  62         unsigned int pll_out = 0, bclk = 0;
  63         int ret = 0;
  64         unsigned long iis_clkrate;
  65
  66         pr_debug("Entered %s\n", __func__);
  67
  68         iis_clkrate = s3c24xx_i2s_get_clockrate();
  69
  70         switch (params_rate(params)) {
  71         case 8000:
  72         case 16000:
  73                 pll_out = 12288000;
  74                 break;
  75         case 48000:
  76                 bclk = WM8753_BCLK_DIV_4;
  77                 pll_out = 12288000;
  78                 break;
  79         case 96000:
  80                 bclk = WM8753_BCLK_DIV_2;
  81                 pll_out = 12288000;
  82                 break;
  83         case 11025:
  84                 bclk = WM8753_BCLK_DIV_16;
  85                 pll_out = 11289600;
  86                 break;
  87         case 22050:
  88                 bclk = WM8753_BCLK_DIV_8;
  89                 pll_out = 11289600;
  90                 break;
  91         case 44100:
  92                 bclk = WM8753_BCLK_DIV_4;
  93                 pll_out = 11289600;
  94                 break;
  95         case 88200:
  96                 bclk = WM8753_BCLK_DIV_2;
  97                 pll_out = 11289600;
  98                 break;
  99         }
 100
 101         /* set codec DAI configuration */
 102         ret = snd_soc_dai_set_fmt(codec_dai,
 103                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 104                 SND_SOC_DAIFMT_CBM_CFM);
 105         if (ret < 0)
 106                 return ret;
 107
 108         /* set cpu DAI configuration */
 109         ret = snd_soc_dai_set_fmt(cpu_dai,
 110                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 111                 SND_SOC_DAIFMT_CBM_CFM);
 112         if (ret < 0)
 113                 return ret;
 114
 115         /* set the codec system clock for DAC and ADC */
 116         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
 117                 SND_SOC_CLOCK_IN);
 118         if (ret < 0)
 119                 return ret;
 120
 121         /* set MCLK division for sample rate */
 122         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 123                 S3C2410_IISMOD_32FS);
 124         if (ret < 0)
 125                 return ret;
 126
 127         /* set codec BCLK division for sample rate */
 128         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
 129         if (ret < 0)
 130                 return ret;
 131
 132         /* set prescaler division for sample rate */
 133         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 134                 S3C24XX_PRESCALE(4, 4));
 135         if (ret < 0)
 136                 return ret;
 137
 138         /* codec PLL input is PCLK/4 */
 139         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
 140                 iis_clkrate / 4, pll_out);
 141         if (ret < 0)
 142                 return ret;
 143
 144         return 0;
 145 }
 146
 147 static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
 148 {
 149         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 150         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 151
 152         pr_debug("Entered %s\n", __func__);
 153
 154         /* disable the PLL */
 155         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
 156 }
 157
 158 /*
 159  * Neo1973 WM8753 HiFi DAI opserations.
 160  */
 161 static struct snd_soc_ops neo1973_hifi_ops = {
 162         .hw_params = neo1973_hifi_hw_params,
 163         .hw_free = neo1973_hifi_hw_free,
 164 };
 165
 166 static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
 167         struct snd_pcm_hw_params *params)
 168 {
 169         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 170         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 171         unsigned int pcmdiv = 0;
 172         int ret = 0;
 173         unsigned long iis_clkrate;
 174
 175         pr_debug("Entered %s\n", __func__);
 176
 177         iis_clkrate = s3c24xx_i2s_get_clockrate();
 178
 179         if (params_rate(params) != 8000)
 180                 return -EINVAL;
 181         if (params_channels(params) != 1)
 182                 return -EINVAL;
 183
 184         pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
 185
 186         /* todo: gg check mode (DSP_B) against CSR datasheet */
 187         /* set codec DAI configuration */
 188         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
 189                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 190         if (ret < 0)
 191                 return ret;
 192
 193         /* set the codec system clock for DAC and ADC */
 194         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
 195                 SND_SOC_CLOCK_IN);
 196         if (ret < 0)
 197                 return ret;
 198
 199         /* set codec PCM division for sample rate */
 200         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
 201         if (ret < 0)
 202                 return ret;
 203
 204         /* configure and enable PLL for 12.288MHz output */
 205         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
 206                 iis_clkrate / 4, 12288000);
 207         if (ret < 0)
 208                 return ret;
 209
 210         return 0;
 211 }
 212
 213 static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
 214 {
 215         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 216         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 217
 218         pr_debug("Entered %s\n", __func__);
 219
 220         /* disable the PLL */
 221         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
 222 }
 223
 224 static struct snd_soc_ops neo1973_voice_ops = {
 225         .hw_params = neo1973_voice_hw_params,
 226         .hw_free = neo1973_voice_hw_free,
 227 };
 228
 229 static int neo1973_scenario;
 230
 231 static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
 232         struct snd_ctl_elem_value *ucontrol)
 233 {
 234         ucontrol->value.integer.value[0] = neo1973_scenario;
 235         return 0;
 236 }
 237
 238 static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
 239 {
 240         struct snd_soc_dapm_context *dapm = &codec->dapm;
 241
 242         pr_debug("Entered %s\n", __func__);
 243
 244         switch (neo1973_scenario) {
 245         case NEO_AUDIO_OFF:
 246                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 247                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 248                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 249                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 250                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 251                 break;
 252         case NEO_GSM_CALL_AUDIO_HANDSET:
 253                 snd_soc_dapm_enable_pin(dapm, "Audio Out");
 254                 snd_soc_dapm_enable_pin(dapm, "GSM Line Out");
 255                 snd_soc_dapm_enable_pin(dapm, "GSM Line In");
 256                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 257                 snd_soc_dapm_enable_pin(dapm, "Call Mic");
 258                 break;
 259         case NEO_GSM_CALL_AUDIO_HEADSET:
 260                 snd_soc_dapm_enable_pin(dapm, "Audio Out");
 261                 snd_soc_dapm_enable_pin(dapm, "GSM Line Out");
 262                 snd_soc_dapm_enable_pin(dapm, "GSM Line In");
 263                 snd_soc_dapm_enable_pin(dapm, "Headset Mic");
 264                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 265                 break;
 266         case NEO_GSM_CALL_AUDIO_BLUETOOTH:
 267                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 268                 snd_soc_dapm_enable_pin(dapm, "GSM Line Out");
 269                 snd_soc_dapm_enable_pin(dapm, "GSM Line In");
 270                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 271                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 272                 break;
 273         case NEO_STEREO_TO_SPEAKERS:
 274                 snd_soc_dapm_enable_pin(dapm, "Audio Out");
 275                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 276                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 277                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 278                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 279                 break;
 280         case NEO_STEREO_TO_HEADPHONES:
 281                 snd_soc_dapm_enable_pin(dapm, "Audio Out");
 282                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 283                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 284                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 285                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 286                 break;
 287         case NEO_CAPTURE_HANDSET:
 288                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 289                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 290                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 291                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 292                 snd_soc_dapm_enable_pin(dapm, "Call Mic");
 293                 break;
 294         case NEO_CAPTURE_HEADSET:
 295                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 296                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 297                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 298                 snd_soc_dapm_enable_pin(dapm, "Headset Mic");
 299                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 300                 break;
 301         case NEO_CAPTURE_BLUETOOTH:
 302                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 303                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 304                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 305                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 306                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 307                 break;
 308         default:
 309                 snd_soc_dapm_disable_pin(dapm, "Audio Out");
 310                 snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 311                 snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 312                 snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 313                 snd_soc_dapm_disable_pin(dapm, "Call Mic");
 314         }
 315
 316         snd_soc_dapm_sync(dapm);
 317
 318         return 0;
 319 }
 320
 321 static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
 322         struct snd_ctl_elem_value *ucontrol)
 323 {
 324         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 325
 326         pr_debug("Entered %s\n", __func__);
 327
 328         if (neo1973_scenario == ucontrol->value.integer.value[0])
 329                 return 0;
 330
 331         neo1973_scenario = ucontrol->value.integer.value[0];
 332         set_scenario_endpoints(codec, neo1973_scenario);
 333         return 1;
 334 }
 335
 336 static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
 337
 338 static void lm4857_write_regs(void)
 339 {
 340         pr_debug("Entered %s\n", __func__);
 341
 342         if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
 343                 printk(KERN_ERR "lm4857: i2c write failed\n");
 344 }
 345
 346 static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
 347         struct snd_ctl_elem_value *ucontrol)
 348 {
 349         struct soc_mixer_control *mc =
 350                 (struct soc_mixer_control *)kcontrol->private_value;
 351         int reg = mc->reg;
 352         int shift = mc->shift;
 353         int mask = mc->max;
 354
 355         pr_debug("Entered %s\n", __func__);
 356
 357         ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
 358         return 0;
 359 }
 360
 361 static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
 362         struct snd_ctl_elem_value *ucontrol)
 363 {
 364         struct soc_mixer_control *mc =
 365                 (struct soc_mixer_control *)kcontrol->private_value;
 366         int reg = mc->reg;
 367         int shift = mc->shift;
 368         int mask = mc->max;
 369
 370         if (((lm4857_regs[reg] >> shift) & mask) ==
 371                 ucontrol->value.integer.value[0])
 372                 return 0;
 373
 374         lm4857_regs[reg] &= ~(mask << shift);
 375         lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
 376         lm4857_write_regs();
 377         return 1;
 378 }
 379
 380 static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
 381         struct snd_ctl_elem_value *ucontrol)
 382 {
 383         u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
 384
 385         pr_debug("Entered %s\n", __func__);
 386
 387         if (value)
 388                 value -= 5;
 389
 390         ucontrol->value.integer.value[0] = value;
 391         return 0;
 392 }
 393
 394 static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
 395         struct snd_ctl_elem_value *ucontrol)
 396 {
 397         u8 value = ucontrol->value.integer.value[0];
 398
 399         pr_debug("Entered %s\n", __func__);
 400
 401         if (value)
 402                 value += 5;
 403
 404         if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
 405                 return 0;
 406
 407         lm4857_regs[LM4857_CTRL] &= 0xF0;
 408         lm4857_regs[LM4857_CTRL] |= value;
 409         lm4857_write_regs();
 410         return 1;
 411 }
 412
 413 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
 414         SND_SOC_DAPM_LINE("Audio Out", NULL),
 415         SND_SOC_DAPM_LINE("GSM Line Out", NULL),
 416         SND_SOC_DAPM_LINE("GSM Line In", NULL),
 417         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 418         SND_SOC_DAPM_MIC("Call Mic", NULL),
 419 };
 420
 421
 422 static const struct snd_soc_dapm_route dapm_routes[] = {
 423
 424         /* Connections to the lm4857 amp */
 425         {"Audio Out", NULL, "LOUT1"},
 426         {"Audio Out", NULL, "ROUT1"},
 427
 428         /* Connections to the GSM Module */
 429         {"GSM Line Out", NULL, "MONO1"},
 430         {"GSM Line Out", NULL, "MONO2"},
 431         {"RXP", NULL, "GSM Line In"},
 432         {"RXN", NULL, "GSM Line In"},
 433
 434         /* Connections to Headset */
 435         {"MIC1", NULL, "Mic Bias"},
 436         {"Mic Bias", NULL, "Headset Mic"},
 437
 438         /* Call Mic */
 439         {"MIC2", NULL, "Mic Bias"},
 440         {"MIC2N", NULL, "Mic Bias"},
 441         {"Mic Bias", NULL, "Call Mic"},
 442
 443         /* Connect the ALC pins */
 444         {"ACIN", NULL, "ACOP"},
 445 };
 446
 447 static const char *lm4857_mode[] = {
 448         "Off",
 449         "Call Speaker",
 450         "Stereo Speakers",
 451         "Stereo Speakers + Headphones",
 452         "Headphones"
 453 };
 454
 455 static const struct soc_enum lm4857_mode_enum[] = {
 456         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
 457 };
 458
 459 static const char *neo_scenarios[] = {
 460         "Off",
 461         "GSM Handset",
 462         "GSM Headset",
 463         "GSM Bluetooth",
 464         "Speakers",
 465         "Headphones",
 466         "Capture Handset",
 467         "Capture Headset",
 468         "Capture Bluetooth"
 469 };
 470
 471 static const struct soc_enum neo_scenario_enum[] = {
 472         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios), neo_scenarios),
 473 };
 474
 475 static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
 476 static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
 477
 478 static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
 479         SOC_SINGLE_EXT_TLV("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
 480                 lm4857_get_reg, lm4857_set_reg, stereo_tlv),
 481         SOC_SINGLE_EXT_TLV("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
 482                 lm4857_get_reg, lm4857_set_reg, stereo_tlv),
 483         SOC_SINGLE_EXT_TLV("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
 484                 lm4857_get_reg, lm4857_set_reg, mono_tlv),
 485         SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
 486                 lm4857_get_mode, lm4857_set_mode),
 487         SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
 488                 neo1973_get_scenario, neo1973_set_scenario),
 489         SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
 490                 lm4857_get_reg, lm4857_set_reg),
 491         SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
 492                 lm4857_get_reg, lm4857_set_reg),
 493         SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
 494                 lm4857_get_reg, lm4857_set_reg),
 495         SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
 496                 lm4857_get_reg, lm4857_set_reg),
 497 };
 498
 499 /*
 500  * This is an example machine initialisation for a wm8753 connected to a
 501  * neo1973 II. It is missing logic to detect hp/mic insertions and logic
 502  * to re-route the audio in such an event.
 503  */
 504 static int neo1973_wm8753_init(struct snd_soc_pcm_runtime *rtd)
 505 {
 506         struct snd_soc_codec *codec = rtd->codec;
 507         struct snd_soc_dapm_context *dapm = &codec->dapm;
 508         int err;
 509
 510         pr_debug("Entered %s\n", __func__);
 511
 512         /* set up NC codec pins */
 513         snd_soc_dapm_nc_pin(dapm, "LOUT2");
 514         snd_soc_dapm_nc_pin(dapm, "ROUT2");
 515         snd_soc_dapm_nc_pin(dapm, "OUT3");
 516         snd_soc_dapm_nc_pin(dapm, "OUT4");
 517         snd_soc_dapm_nc_pin(dapm, "LINE1");
 518         snd_soc_dapm_nc_pin(dapm, "LINE2");
 519
 520         /* Add neo1973 specific widgets */
 521         snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
 522                                   ARRAY_SIZE(wm8753_dapm_widgets));
 523
 524         /* set endpoints to default mode */
 525         set_scenario_endpoints(codec, NEO_AUDIO_OFF);
 526
 527         /* add neo1973 specific controls */
 528         err = snd_soc_add_controls(codec, wm8753_neo1973_controls,
 529                                 ARRAY_SIZE(8753_neo1973_controls));
 530         if (err < 0)
 531                 return err;
 532
 533         /* set up neo1973 specific audio routes */
 534         err = snd_soc_dapm_add_routes(dapm, dapm_routes,
 535                                       ARRAY_SIZE(dapm_routes));
 536
 537         snd_soc_dapm_sync(dapm);
 538         return 0;
 539 }
 540
 541 /*
 542  * BT Codec DAI
 543  */
 544 static struct snd_soc_dai bt_dai = {
 545         .name = "bluetooth-dai",
 546         .playback = {
 547                 .channels_min = 1,
 548                 .channels_max = 1,
 549                 .rates = SNDRV_PCM_RATE_8000,
 550                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 551         .capture = {
 552                 .channels_min = 1,
 553                 .channels_max = 1,
 554                 .rates = SNDRV_PCM_RATE_8000,
 555                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 556 };
 557
 558 static struct snd_soc_dai_link neo1973_dai[] = {
 559 { /* Hifi Playback - for similatious use with voice below */
 560         .name = "WM8753",
 561         .stream_name = "WM8753 HiFi",
 562         .platform_name = "s3c24xx-pcm-audio",
 563         .cpu_dai_name = "s3c24xx-i2s",
 564         .codec_dai_name = "wm8753-hifi",
 565         .codec_name = "wm8753-codec.0-0x1a",
 566         .init = neo1973_wm8753_init,
 567         .ops = &neo1973_hifi_ops,
 568 },
 569 { /* Voice via BT */
 570         .name = "Bluetooth",
 571         .stream_name = "Voice",
 572         .platform_name = "s3c24xx-pcm-audio",
 573         .cpu_dai_name = "bluetooth-dai",
 574         .codec_dai_name = "wm8753-voice",
 575         .codec_name = "wm8753-codec.0-0x1a",
 576         .ops = &neo1973_voice_ops,
 577 },
 578 };
 579
 580 static struct snd_soc_card neo1973 = {
 581         .name = "neo1973",
 582         .dai_link = neo1973_dai,
 583         .num_links = ARRAY_SIZE(neo1973_dai),
 584 };
 585
 586 static int lm4857_i2c_probe(struct i2c_client *client,
 587                             const struct i2c_device_id *id)
 588 {
 589         pr_debug("Entered %s\n", __func__);
 590
 591         i2c = client;
 592
 593         lm4857_write_regs();
 594         return 0;
 595 }
 596
 597 static int lm4857_i2c_remove(struct i2c_client *client)
 598 {
 599         pr_debug("Entered %s\n", __func__);
 600
 601         i2c = NULL;
 602
 603         return 0;
 604 }
 605
 606 static u8 lm4857_state;
 607
 608 static int lm4857_suspend(struct i2c_client *dev, pm_message_t state)
 609 {
 610         pr_debug("Entered %s\n", __func__);
 611
 612         dev_dbg(&dev->dev, "lm4857_suspend\n");
 613         lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf;
 614         if (lm4857_state) {
 615                 lm4857_regs[LM4857_CTRL] &= 0xf0;
 616                 lm4857_write_regs();
 617         }
 618         return 0;
 619 }
 620
 621 static int lm4857_resume(struct i2c_client *dev)
 622 {
 623         pr_debug("Entered %s\n", __func__);
 624
 625         if (lm4857_state) {
 626                 lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f);
 627                 lm4857_write_regs();
 628         }
 629         return 0;
 630 }
 631
 632 static void lm4857_shutdown(struct i2c_client *dev)
 633 {
 634         pr_debug("Entered %s\n", __func__);
 635
 636         dev_dbg(&dev->dev, "lm4857_shutdown\n");
 637         lm4857_regs[LM4857_CTRL] &= 0xf0;
 638         lm4857_write_regs();
 639 }
 640
 641 static const struct i2c_device_id lm4857_i2c_id[] = {
 642         { "neo1973_lm4857", 0 },
 643         { }
 644 };
 645
 646 static struct i2c_driver lm4857_i2c_driver = {
 647         .driver = {
 648                 .name = "LM4857 I2C Amp",
 649                 .owner = THIS_MODULE,
 650         },
 651         .suspend =        lm4857_suspend,
 652         .resume =         lm4857_resume,
 653         .shutdown =       lm4857_shutdown,
 654         .probe =          lm4857_i2c_probe,
 655         .remove =         lm4857_i2c_remove,
 656         .id_table =       lm4857_i2c_id,
 657 };
 658
 659 static struct platform_device *neo1973_snd_device;
 660
 661 static int __init neo1973_init(void)
 662 {
 663         int ret;
 664
 665         pr_debug("Entered %s\n", __func__);
 666
 667         if (!machine_is_neo1973_gta01()) {
 668                 printk(KERN_INFO
 669                         "Only GTA01 hardware supported by ASoC driver\n");
 670                 return -ENODEV;
 671         }
 672
 673         neo1973_snd_device = platform_device_alloc("soc-audio", -1);
 674         if (!neo1973_snd_device)
 675                 return -ENOMEM;
 676
 677         platform_set_drvdata(neo1973_snd_device, &neo1973);
 678         ret = platform_device_add(neo1973_snd_device);
 679
 680         if (ret) {
 681                 platform_device_put(neo1973_snd_device);
 682                 return ret;
 683         }
 684
 685         ret = i2c_add_driver(&lm4857_i2c_driver);
 686
 687         if (ret != 0)
 688                 platform_device_unregister(neo1973_snd_device);
 689
 690         return ret;
 691 }
 692
 693 static void __exit neo1973_exit(void)
 694 {
 695         pr_debug("Entered %s\n", __func__);
 696
 697         i2c_del_driver(&lm4857_i2c_driver);
 698         platform_device_unregister(neo1973_snd_device);
 699 }
 700
 701 module_init(neo1973_init);
 702 module_exit(neo1973_exit);
 703
 704 /* Module information */
 705 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
 706 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
 707 MODULE_LICENSE("GPL");