sound/soc/samsung/neo1973_gta02_wm8753.c

   1 /*
   2  * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko Freerunner(GTA02)
   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/gpio.h>
  17
  18 #include <sound/soc.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <plat/regs-iis.h>
  22 #include <mach/gta02.h>
  23
  24 #include "../codecs/wm8753.h"
  25 #include "s3c24xx-i2s.h"
  26
  27 static struct snd_soc_card neo1973_gta02;
  28
  29 static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
  30         struct snd_pcm_hw_params *params)
  31 {
  32         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  33         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  34         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  35         unsigned int pll_out = 0, bclk = 0;
  36         int ret = 0;
  37         unsigned long iis_clkrate;
  38
  39         iis_clkrate = s3c24xx_i2s_get_clockrate();
  40
  41         switch (params_rate(params)) {
  42         case 8000:
  43         case 16000:
  44                 pll_out = 12288000;
  45                 break;
  46         case 48000:
  47                 bclk = WM8753_BCLK_DIV_4;
  48                 pll_out = 12288000;
  49                 break;
  50         case 96000:
  51                 bclk = WM8753_BCLK_DIV_2;
  52                 pll_out = 12288000;
  53                 break;
  54         case 11025:
  55                 bclk = WM8753_BCLK_DIV_16;
  56                 pll_out = 11289600;
  57                 break;
  58         case 22050:
  59                 bclk = WM8753_BCLK_DIV_8;
  60                 pll_out = 11289600;
  61                 break;
  62         case 44100:
  63                 bclk = WM8753_BCLK_DIV_4;
  64                 pll_out = 11289600;
  65                 break;
  66         case 88200:
  67                 bclk = WM8753_BCLK_DIV_2;
  68                 pll_out = 11289600;
  69                 break;
  70         }
  71
  72         /* set codec DAI configuration */
  73         ret = snd_soc_dai_set_fmt(codec_dai,
  74                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  75                 SND_SOC_DAIFMT_CBM_CFM);
  76         if (ret < 0)
  77                 return ret;
  78
  79         /* set cpu DAI configuration */
  80         ret = snd_soc_dai_set_fmt(cpu_dai,
  81                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  82                 SND_SOC_DAIFMT_CBM_CFM);
  83         if (ret < 0)
  84                 return ret;
  85
  86         /* set the codec system clock for DAC and ADC */
  87         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
  88                 SND_SOC_CLOCK_IN);
  89         if (ret < 0)
  90                 return ret;
  91
  92         /* set MCLK division for sample rate */
  93         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
  94                 S3C2410_IISMOD_32FS);
  95         if (ret < 0)
  96                 return ret;
  97
  98         /* set codec BCLK division for sample rate */
  99         ret = snd_soc_dai_set_clkdiv(codec_dai,
 100                                         WM8753_BCLKDIV, bclk);
 101         if (ret < 0)
 102                 return ret;
 103
 104         /* set prescaler division for sample rate */
 105         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 106                 S3C24XX_PRESCALE(4, 4));
 107         if (ret < 0)
 108                 return ret;
 109
 110         /* codec PLL input is PCLK/4 */
 111         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
 112                 iis_clkrate / 4, pll_out);
 113         if (ret < 0)
 114                 return ret;
 115
 116         return 0;
 117 }
 118
 119 static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
 120 {
 121         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 122         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 123
 124         /* disable the PLL */
 125         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
 126 }
 127
 128 /*
 129  * Neo1973 WM8753 HiFi DAI opserations.
 130  */
 131 static struct snd_soc_ops neo1973_gta02_hifi_ops = {
 132         .hw_params = neo1973_gta02_hifi_hw_params,
 133         .hw_free = neo1973_gta02_hifi_hw_free,
 134 };
 135
 136 static int neo1973_gta02_voice_hw_params(
 137         struct snd_pcm_substream *substream,
 138         struct snd_pcm_hw_params *params)
 139 {
 140         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 141         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 142         unsigned int pcmdiv = 0;
 143         int ret = 0;
 144         unsigned long iis_clkrate;
 145
 146         iis_clkrate = s3c24xx_i2s_get_clockrate();
 147
 148         if (params_rate(params) != 8000)
 149                 return -EINVAL;
 150         if (params_channels(params) != 1)
 151                 return -EINVAL;
 152
 153         pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
 154
 155         /* todo: gg check mode (DSP_B) against CSR datasheet */
 156         /* set codec DAI configuration */
 157         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
 158                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 159         if (ret < 0)
 160                 return ret;
 161
 162         /* set the codec system clock for DAC and ADC */
 163         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
 164                 12288000, SND_SOC_CLOCK_IN);
 165         if (ret < 0)
 166                 return ret;
 167
 168         /* set codec PCM division for sample rate */
 169         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
 170                                         pcmdiv);
 171         if (ret < 0)
 172                 return ret;
 173
 174         /* configure and enable PLL for 12.288MHz output */
 175         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
 176                 iis_clkrate / 4, 12288000);
 177         if (ret < 0)
 178                 return ret;
 179
 180         return 0;
 181 }
 182
 183 static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
 184 {
 185         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 186         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 187
 188         /* disable the PLL */
 189         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
 190 }
 191
 192 static struct snd_soc_ops neo1973_gta02_voice_ops = {
 193         .hw_params = neo1973_gta02_voice_hw_params,
 194         .hw_free = neo1973_gta02_voice_hw_free,
 195 };
 196
 197 static int gta02_speaker_enabled;
 198
 199 static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
 200         struct snd_ctl_elem_value *ucontrol)
 201 {
 202         gta02_speaker_enabled = ucontrol->value.integer.value[0];
 203
 204         gpio_set_value(GTA02_GPIO_HP_IN, !gta02_speaker_enabled);
 205
 206         return 0;
 207 }
 208
 209 static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
 210         struct snd_ctl_elem_value *ucontrol)
 211 {
 212         ucontrol->value.integer.value[0] = gta02_speaker_enabled;
 213         return 0;
 214 }
 215
 216 static int lm4853_event(struct snd_soc_dapm_widget *w,
 217                         struct snd_kcontrol *k, int event)
 218 {
 219         gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));
 220
 221         return 0;
 222 }
 223
 224 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
 225         SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
 226         SND_SOC_DAPM_LINE("GSM Line Out", NULL),
 227         SND_SOC_DAPM_LINE("GSM Line In", NULL),
 228         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 229         SND_SOC_DAPM_MIC("Handset Mic", NULL),
 230         SND_SOC_DAPM_SPK("Handset Spk", NULL),
 231 };
 232
 233
 234 /* example machine audio_mapnections */
 235 static const struct snd_soc_dapm_route audio_map[] = {
 236
 237         /* Connections to the lm4853 amp */
 238         {"Stereo Out", NULL, "LOUT1"},
 239         {"Stereo Out", NULL, "ROUT1"},
 240
 241         /* Connections to the GSM Module */
 242         {"GSM Line Out", NULL, "MONO1"},
 243         {"GSM Line Out", NULL, "MONO2"},
 244         {"RXP", NULL, "GSM Line In"},
 245         {"RXN", NULL, "GSM Line In"},
 246
 247         /* Connections to Headset */
 248         {"MIC1", NULL, "Mic Bias"},
 249         {"Mic Bias", NULL, "Headset Mic"},
 250
 251         /* Call Mic */
 252         {"MIC2", NULL, "Mic Bias"},
 253         {"MIC2N", NULL, "Mic Bias"},
 254         {"Mic Bias", NULL, "Handset Mic"},
 255
 256         /* Call Speaker */
 257         {"Handset Spk", NULL, "LOUT2"},
 258         {"Handset Spk", NULL, "ROUT2"},
 259
 260         /* Connect the ALC pins */
 261         {"ACIN", NULL, "ACOP"},
 262 };
 263
 264 static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
 265         SOC_DAPM_PIN_SWITCH("Stereo Out"),
 266         SOC_DAPM_PIN_SWITCH("GSM Line Out"),
 267         SOC_DAPM_PIN_SWITCH("GSM Line In"),
 268         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 269         SOC_DAPM_PIN_SWITCH("Handset Mic"),
 270         SOC_DAPM_PIN_SWITCH("Handset Spk"),
 271
 272         SOC_SINGLE_BOOL_EXT("Amp Spk Switch", 0,
 273                 lm4853_get_spk,
 274                 lm4853_set_spk),
 275 };
 276
 277 /*
 278  * This is an example machine initialisation for a wm8753 connected to a
 279  * neo1973 GTA02.
 280  */
 281 static int neo1973_gta02_wm8753_init(struct snd_soc_pcm_runtime *rtd)
 282 {
 283         struct snd_soc_codec *codec = rtd->codec;
 284         struct snd_soc_dapm_context *dapm = &codec->dapm;
 285         int err;
 286
 287         /* set up NC codec pins */
 288         snd_soc_dapm_nc_pin(dapm, "OUT3");
 289         snd_soc_dapm_nc_pin(dapm, "OUT4");
 290         snd_soc_dapm_nc_pin(dapm, "LINE1");
 291         snd_soc_dapm_nc_pin(dapm, "LINE2");
 292
 293         /* Add neo1973 gta02 specific widgets */
 294         snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
 295                                   ARRAY_SIZE(wm8753_dapm_widgets));
 296
 297         /* add neo1973 gta02 specific controls */
 298         err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
 299                 ARRAY_SIZE(wm8753_neo1973_gta02_controls));
 300
 301         if (err < 0)
 302                 return err;
 303
 304         /* set up neo1973 gta02 specific audio path audio_map */
 305         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 306
 307         /* set endpoints to default off mode */
 308         snd_soc_dapm_disable_pin(dapm, "Stereo Out");
 309         snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 310         snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 311         snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 312         snd_soc_dapm_disable_pin(dapm, "Handset Mic");
 313         snd_soc_dapm_disable_pin(dapm, "Handset Spk");
 314
 315         /* allow audio paths from the GSM modem to run during suspend */
 316         snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
 317         snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
 318         snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
 319         snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
 320         snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");
 321         snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");
 322
 323         snd_soc_dapm_sync(dapm);
 324
 325         return 0;
 326 }
 327
 328 /*
 329  * BT Codec DAI
 330  */
 331 static struct snd_soc_dai_driver bt_dai = {
 332         .name = "bluetooth-dai",
 333         .playback = {
 334                 .channels_min = 1,
 335                 .channels_max = 1,
 336                 .rates = SNDRV_PCM_RATE_8000,
 337                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 338         .capture = {
 339                 .channels_min = 1,
 340                 .channels_max = 1,
 341                 .rates = SNDRV_PCM_RATE_8000,
 342                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 343 };
 344
 345 static struct snd_soc_dai_link neo1973_gta02_dai[] = {
 346 { /* Hifi Playback - for similatious use with voice below */
 347         .name = "WM8753",
 348         .stream_name = "WM8753 HiFi",
 349         .cpu_dai_name = "s3c24xx-iis",
 350         .codec_dai_name = "wm8753-hifi",
 351         .init = neo1973_gta02_wm8753_init,
 352         .platform_name = "samsung-audio",
 353         .codec_name = "wm8753-codec.0-001a",
 354         .ops = &neo1973_gta02_hifi_ops,
 355 },
 356 { /* Voice via BT */
 357         .name = "Bluetooth",
 358         .stream_name = "Voice",
 359         .cpu_dai_name = "bluetooth-dai",
 360         .codec_dai_name = "wm8753-voice",
 361         .ops = &neo1973_gta02_voice_ops,
 362         .codec_name = "wm8753-codec.0-001a",
 363         .platform_name = "samsung-audio",
 364 },
 365 };
 366
 367 static struct snd_soc_card neo1973_gta02 = {
 368         .name = "neo1973-gta02",
 369         .dai_link = neo1973_gta02_dai,
 370         .num_links = ARRAY_SIZE(neo1973_gta02_dai),
 371 };
 372
 373 static const struct gpio neo1973_gta02_gpios[] = {
 374         { GTA02_GPIO_HP_IN, GPIOF_OUT_INIT_HIGH, "GTA02_HP_IN" },
 375         { GTA02_GPIO_AMP_SHUT, GPIOF_OUT_INIT_HIGH, "GTA02_AMP_SHUT" },
 376 };
 377
 378 static struct platform_device *neo1973_gta02_snd_device;
 379
 380 static int __init neo1973_gta02_init(void)
 381 {
 382         int ret;
 383
 384         if (!machine_is_neo1973_gta02()) {
 385                 printk(KERN_INFO
 386                        "Only GTA02 is supported by this ASoC driver\n");
 387                 return -ENODEV;
 388         }
 389
 390         ret = gpio_request_array(neo1973_gta02_gpios,
 391                                 ARRAY_SIZE(neo1973_gta02_gpios));
 392         if (ret)
 393                 return ret;
 394
 395         neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
 396         if (!neo1973_gta02_snd_device) {
 397                 ret = -ENOMEM;
 398                 goto err_gpio_free;
 399         }
 400
 401         /* register bluetooth DAI here */
 402         ret = snd_soc_register_dai(&neo1973_gta02_snd_device->dev, &bt_dai);
 403         if (ret)
 404                 goto err_put_device;
 405
 406         platform_set_drvdata(neo1973_gta02_snd_device, &neo1973_gta02);
 407         ret = platform_device_add(neo1973_gta02_snd_device);
 408
 409         if (ret)
 410                 goto err_unregister_dai;
 411
 412         return 0;
 413
 414 err_unregister_dai:
 415         snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
 416 err_put_device:
 417         platform_device_put(neo1973_gta02_snd_device);
 418 err_gpio_free:
 419         gpio_free_array(neo1973_gta02_gpios, ARRAY_SIZE(neo1973_gta02_gpios));
 420         return ret;
 421 }
 422 module_init(neo1973_gta02_init);
 423
 424 static void __exit neo1973_gta02_exit(void)
 425 {
 426         snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
 427         platform_device_unregister(neo1973_gta02_snd_device);
 428         gpio_free_array(neo1973_gta02_gpios, ARRAY_SIZE(neo1973_gta02_gpios));
 429 }
 430 module_exit(neo1973_gta02_exit);
 431
 432 /* Module information */
 433 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
 434 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
 435 MODULE_LICENSE("GPL");