target/linux/s3c24xx/files-2.6.30/sound/soc/s3c24xx/gta02_wm8753.c

   1 /*
   2  * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko freerunner
   3  *
   4  * Copyright 2007 Openmoko Inc
   5  * Author: Graeme Gregory <graeme@openmoko.org>
   6  * Copyright 2007 Wolfson Microelectronics PLC.
   7  * Author: Graeme Gregory <linux@wolfsonmicro.com>
   8  * Copyright 2009 Wolfson Microelectronics
   9  *
  10  *  This program is free software; you can redistribute  it and/or modify it
  11  *  under  the terms of  the GNU General  Public License as published by the
  12  *  Free Software Foundation;  either version 2 of the  License, or (at your
  13  *  option) any later version.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/moduleparam.h>
  18 #include <linux/timer.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/platform_device.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24 #include <sound/soc-dapm.h>
  25
  26 #include <asm/mach-types.h>
  27
  28 #include <plat/regs-iis.h>
  29
  30 #include <mach/regs-clock.h>
  31 #include <mach/regs-gpio.h>
  32 #include <mach/hardware.h>
  33 #include <asm/io.h>
  34 #include <mach/regs-gpioj.h>
  35 #include <mach/gta02.h>
  36 #include "../codecs/wm8753.h"
  37 #include "s3c24xx-pcm.h"
  38 #include "s3c24xx-i2s.h"
  39
  40 static struct snd_soc_card neo1973_gta02;
  41
  42 static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
  43         struct snd_pcm_hw_params *params)
  44 {
  45         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  46         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  47         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  48         unsigned int pll_out = 0, bclk = 0;
  49         int ret = 0;
  50         unsigned long iis_clkrate;
  51
  52         iis_clkrate = s3c24xx_i2s_get_clockrate();
  53
  54         switch (params_rate(params)) {
  55         case 8000:
  56         case 16000:
  57                 pll_out = 12288000;
  58                 break;
  59         case 48000:
  60                 bclk = WM8753_BCLK_DIV_4;
  61                 pll_out = 12288000;
  62                 break;
  63         case 96000:
  64                 bclk = WM8753_BCLK_DIV_2;
  65                 pll_out = 12288000;
  66                 break;
  67         case 11025:
  68                 bclk = WM8753_BCLK_DIV_16;
  69                 pll_out = 11289600;
  70                 break;
  71         case 22050:
  72                 bclk = WM8753_BCLK_DIV_8;
  73                 pll_out = 11289600;
  74                 break;
  75         case 44100:
  76                 bclk = WM8753_BCLK_DIV_4;
  77                 pll_out = 11289600;
  78                 break;
  79         case 88200:
  80                 bclk = WM8753_BCLK_DIV_2;
  81                 pll_out = 11289600;
  82                 break;
  83         }
  84
  85         /* set codec DAI configuration */
  86         ret = snd_soc_dai_set_fmt(codec_dai,
  87                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  88                 SND_SOC_DAIFMT_CBM_CFM);
  89         if (ret < 0)
  90                 return ret;
  91
  92         /* set cpu DAI configuration */
  93         ret = snd_soc_dai_set_fmt(cpu_dai,
  94                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  95                 SND_SOC_DAIFMT_CBM_CFM);
  96         if (ret < 0)
  97                 return ret;
  98
  99         /* set the codec system clock for DAC and ADC */
 100         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
 101                 SND_SOC_CLOCK_IN);
 102         if (ret < 0)
 103                 return ret;
 104
 105         /* set MCLK division for sample rate */
 106         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 107                 S3C2410_IISMOD_32FS);
 108         if (ret < 0)
 109                 return ret;
 110
 111         /* set codec BCLK division for sample rate */
 112         ret = snd_soc_dai_set_clkdiv(codec_dai,
 113                                         WM8753_BCLKDIV, bclk);
 114         if (ret < 0)
 115                 return ret;
 116
 117         /* set prescaler division for sample rate */
 118         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 119                 S3C24XX_PRESCALE(4, 4));
 120         if (ret < 0)
 121                 return ret;
 122
 123         /* codec PLL input is PCLK/4 */
 124         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1,
 125                 iis_clkrate / 4, pll_out);
 126         if (ret < 0)
 127                 return ret;
 128
 129         return 0;
 130 }
 131
 132 static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
 133 {
 134         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 135         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 136
 137         /* disable the PLL */
 138         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0);
 139 }
 140
 141 /*
 142  * Neo1973 WM8753 HiFi DAI opserations.
 143  */
 144 static struct snd_soc_ops neo1973_gta02_hifi_ops = {
 145         .hw_params = neo1973_gta02_hifi_hw_params,
 146         .hw_free = neo1973_gta02_hifi_hw_free,
 147 };
 148
 149 static int neo1973_gta02_voice_hw_params(
 150         struct snd_pcm_substream *substream,
 151         struct snd_pcm_hw_params *params)
 152 {
 153         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 154         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 155         unsigned int pcmdiv = 0;
 156         int ret = 0;
 157         unsigned long iis_clkrate;
 158
 159         iis_clkrate = s3c24xx_i2s_get_clockrate();
 160
 161         if (params_rate(params) != 8000)
 162                 return -EINVAL;
 163         if (params_channels(params) != 1)
 164                 return -EINVAL;
 165
 166         pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
 167
 168         /* todo: gg check mode (DSP_B) against CSR datasheet */
 169         /* set codec DAI configuration */
 170         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
 171                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 172         if (ret < 0)
 173                 return ret;
 174
 175         /* set the codec system clock for DAC and ADC */
 176         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
 177                 12288000, SND_SOC_CLOCK_IN);
 178         if (ret < 0)
 179                 return ret;
 180
 181         /* set codec PCM division for sample rate */
 182         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
 183                                         pcmdiv);
 184         if (ret < 0)
 185                 return ret;
 186
 187         /* configue and enable PLL for 12.288MHz output */
 188         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2,
 189                 iis_clkrate / 4, 12288000);
 190         if (ret < 0)
 191                 return ret;
 192
 193         return 0;
 194 }
 195
 196 static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
 197 {
 198         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 199         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 200
 201         /* disable the PLL */
 202         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0);
 203 }
 204
 205 static struct snd_soc_ops neo1973_gta02_voice_ops = {
 206         .hw_params = neo1973_gta02_voice_hw_params,
 207         .hw_free = neo1973_gta02_voice_hw_free,
 208 };
 209
 210 #define LM4853_AMP 1
 211 #define LM4853_SPK 2
 212
 213 static u8 lm4853_state;
 214
 215 /* This has no effect, it exists only to maintain compatibility with
 216  * existing ALSA state files.
 217  */
 218 static int lm4853_set_state(struct snd_kcontrol *kcontrol,
 219         struct snd_ctl_elem_value *ucontrol)
 220 {
 221         int val = ucontrol->value.integer.value[0];
 222
 223         if (val)
 224                 lm4853_state |= LM4853_AMP;
 225         else
 226                 lm4853_state &= ~LM4853_AMP;
 227
 228         return 0;
 229 }
 230
 231 static int lm4853_get_state(struct snd_kcontrol *kcontrol,
 232         struct snd_ctl_elem_value *ucontrol)
 233 {
 234         ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;
 235
 236         return 0;
 237 }
 238
 239 static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
 240         struct snd_ctl_elem_value *ucontrol)
 241 {
 242         int val = ucontrol->value.integer.value[0];
 243
 244         if (val) {
 245                 lm4853_state |= LM4853_SPK;
 246                 s3c2410_gpio_setpin(GTA02_GPIO_HP_IN, 0);
 247         } else {
 248                 lm4853_state &= ~LM4853_SPK;
 249                 s3c2410_gpio_setpin(GTA02_GPIO_HP_IN, 1);
 250         }
 251
 252         return 0;
 253 }
 254
 255 static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
 256         struct snd_ctl_elem_value *ucontrol)
 257 {
 258         ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;
 259
 260         return 0;
 261 }
 262
 263 static int lm4853_event(struct snd_soc_dapm_widget *w,
 264                         struct snd_kcontrol *k,
 265                         int event)
 266 {
 267         if (SND_SOC_DAPM_EVENT_ON(event))
 268                 s3c2410_gpio_setpin(GTA02_GPIO_AMP_SHUT, 0);
 269
 270         if (SND_SOC_DAPM_EVENT_OFF(event))
 271                 s3c2410_gpio_setpin(GTA02_GPIO_AMP_SHUT, 1);
 272
 273         return 0;
 274 }
 275
 276 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
 277         SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
 278         SND_SOC_DAPM_LINE("GSM Line Out", NULL),
 279         SND_SOC_DAPM_LINE("GSM Line In", NULL),
 280         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 281         SND_SOC_DAPM_MIC("Handset Mic", NULL),
 282         SND_SOC_DAPM_SPK("Handset Spk", NULL),
 283 };
 284
 285
 286 /* example machine audio_mapnections */
 287 static const struct snd_soc_dapm_route audio_map[] = {
 288
 289         /* Connections to the lm4853 amp */
 290         {"Stereo Out", NULL, "LOUT1"},
 291         {"Stereo Out", NULL, "ROUT1"},
 292
 293         /* Connections to the GSM Module */
 294         {"GSM Line Out", NULL, "MONO1"},
 295         {"GSM Line Out", NULL, "MONO2"},
 296         {"RXP", NULL, "GSM Line In"},
 297         {"RXN", NULL, "GSM Line In"},
 298
 299         /* Connections to Headset */
 300         {"MIC1", NULL, "Mic Bias"},
 301         {"Mic Bias", NULL, "Headset Mic"},
 302
 303         /* Call Mic */
 304         {"MIC2", NULL, "Mic Bias"},
 305         {"MIC2N", NULL, "Mic Bias"},
 306         {"Mic Bias", NULL, "Handset Mic"},
 307
 308         /* Call Speaker */
 309         {"Handset Spk", NULL, "LOUT2"},
 310         {"Handset Spk", NULL, "ROUT2"},
 311
 312         /* Connect the ALC pins */
 313         {"ACIN", NULL, "ACOP"},
 314 };
 315
 316 static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
 317         SOC_DAPM_PIN_SWITCH("Stereo Out"),
 318         SOC_DAPM_PIN_SWITCH("GSM Line Out"),
 319         SOC_DAPM_PIN_SWITCH("GSM Line In"),
 320         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 321         SOC_DAPM_PIN_SWITCH("Handset Mic"),
 322         SOC_DAPM_PIN_SWITCH("Handset Spk"),
 323
 324         /* This has no effect, it exists only to maintain compatibility with
 325          * existing ALSA state files.
 326          */
 327         SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
 328                 lm4853_get_state,
 329                 lm4853_set_state),
 330         SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
 331                 lm4853_get_spk,
 332                 lm4853_set_spk),
 333 };
 334
 335 /*
 336  * This is an example machine initialisation for a wm8753 connected to a
 337  * neo1973 GTA02.
 338  */
 339 static int neo1973_gta02_wm8753_init(struct snd_soc_codec *codec)
 340 {
 341         int err;
 342
 343         /* set up NC codec pins */
 344         snd_soc_dapm_nc_pin(codec, "OUT3");
 345         snd_soc_dapm_nc_pin(codec, "OUT4");
 346         snd_soc_dapm_nc_pin(codec, "LINE1");
 347         snd_soc_dapm_nc_pin(codec, "LINE2");
 348
 349         /* Add neo1973 gta02 specific widgets */
 350         snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
 351                                   ARRAY_SIZE(wm8753_dapm_widgets));
 352
 353         /* add neo1973 gta02 specific controls */
 354         err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
 355                 ARRAY_SIZE(wm8753_neo1973_gta02_controls));
 356
 357         if (err < 0)
 358                 return err;
 359
 360         /* set up neo1973 gta02 specific audio path audio_map */
 361         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 362
 363         /* set endpoints to default off mode */
 364         snd_soc_dapm_disable_pin(codec, "Stereo Out");
 365         snd_soc_dapm_disable_pin(codec, "GSM Line Out");
 366         snd_soc_dapm_disable_pin(codec, "GSM Line In");
 367         snd_soc_dapm_disable_pin(codec, "Headset Mic");
 368         snd_soc_dapm_disable_pin(codec, "Handset Mic");
 369         snd_soc_dapm_disable_pin(codec, "Handset Spk");
 370
 371         snd_soc_dapm_sync(codec);
 372
 373         return 0;
 374 }
 375
 376 /*
 377  * BT Codec DAI
 378  */
 379 static struct snd_soc_dai bt_dai = {
 380         .name = "Bluetooth",
 381         .id = 0,
 382         .playback = {
 383                 .channels_min = 1,
 384                 .channels_max = 1,
 385                 .rates = SNDRV_PCM_RATE_8000,
 386                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 387         .capture = {
 388                 .channels_min = 1,
 389                 .channels_max = 1,
 390                 .rates = SNDRV_PCM_RATE_8000,
 391                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 392 };
 393
 394 static struct snd_soc_dai_link neo1973_gta02_dai[] = {
 395 { /* Hifi Playback - for similatious use with voice below */
 396         .name = "WM8753",
 397         .stream_name = "WM8753 HiFi",
 398         .cpu_dai = &s3c24xx_i2s_dai,
 399         .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
 400         .init = neo1973_gta02_wm8753_init,
 401         .ops = &neo1973_gta02_hifi_ops,
 402 },
 403 { /* Voice via BT */
 404         .name = "Bluetooth",
 405         .stream_name = "Voice",
 406         .cpu_dai = &bt_dai,
 407         .codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
 408         .ops = &neo1973_gta02_voice_ops,
 409 },
 410 };
 411
 412 static struct snd_soc_card neo1973_gta02 = {
 413         .name = "neo1973-gta02",
 414         .platform = &s3c24xx_soc_platform,
 415         .dai_link = neo1973_gta02_dai,
 416         .num_links = ARRAY_SIZE(neo1973_gta02_dai),
 417 };
 418
 419 static struct snd_soc_device neo1973_gta02_snd_devdata = {
 420         .card = &neo1973_gta02,
 421         .codec_dev = &soc_codec_dev_wm8753,
 422 };
 423
 424 static struct platform_device *neo1973_gta02_snd_device;
 425
 426 static int __init neo1973_gta02_init(void)
 427 {
 428         int ret;
 429
 430         if (!machine_is_neo1973_gta02()) {
 431                 printk(KERN_INFO
 432                        "Only GTA02 is supported by this ASoC driver\n");
 433                 return -ENODEV;
 434         }
 435
 436         /* register bluetooth DAI here */
 437         ret = snd_soc_register_dai(&bt_dai);
 438         if (ret)
 439                 return ret;
 440
 441         neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
 442         if (!neo1973_gta02_snd_device)
 443                 return -ENOMEM;
 444
 445         platform_set_drvdata(neo1973_gta02_snd_device,
 446                         &neo1973_gta02_snd_devdata);
 447         neo1973_gta02_snd_devdata.dev = &neo1973_gta02_snd_device->dev;
 448         ret = platform_device_add(neo1973_gta02_snd_device);
 449
 450         if (ret) {
 451                 platform_device_put(neo1973_gta02_snd_device);
 452                 return ret;
 453         }
 454
 455         /* Initialise GPIOs used by amp */
 456         s3c2410_gpio_cfgpin(GTA02_GPIO_HP_IN, S3C2410_GPIO_OUTPUT);
 457         s3c2410_gpio_cfgpin(GTA02_GPIO_AMP_SHUT, S3C2410_GPIO_OUTPUT);
 458
 459         /* Amp off by default */
 460         s3c2410_gpio_setpin(GTA02_GPIO_AMP_SHUT, 1);
 461
 462         /* Speaker off by default */
 463         s3c2410_gpio_setpin(GTA02_GPIO_HP_IN, 1);
 464
 465         return ret;
 466 }
 467 module_init(neo1973_gta02_init);
 468
 469 static void __exit neo1973_gta02_exit(void)
 470 {
 471         snd_soc_unregister_dai(&bt_dai);
 472         platform_device_unregister(neo1973_gta02_snd_device);
 473 }
 474 module_exit(neo1973_gta02_exit);
 475
 476 /* Module information */
 477 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
 478 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
 479 MODULE_LICENSE("GPL");