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/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 <linux/gpio.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/soc.h>
  25
  26 #include <asm/mach-types.h>
  27
  28 #include <plat/regs-iis.h>
  29
  30 #include <mach/regs-clock.h>
  31 #include <asm/io.h>
  32 #include <mach/gta02.h>
  33 #include "../codecs/wm8753.h"
  34 #include "dma.h"
  35 #include "s3c24xx-i2s.h"
  36
  37 static struct snd_soc_card neo1973_gta02;
  38
  39 static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
  40         struct snd_pcm_hw_params *params)
  41 {
  42         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  43         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  44         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  45         unsigned int pll_out = 0, bclk = 0;
  46         int ret = 0;
  47         unsigned long iis_clkrate;
  48
  49         iis_clkrate = s3c24xx_i2s_get_clockrate();
  50
  51         switch (params_rate(params)) {
  52         case 8000:
  53         case 16000:
  54                 pll_out = 12288000;
  55                 break;
  56         case 48000:
  57                 bclk = WM8753_BCLK_DIV_4;
  58                 pll_out = 12288000;
  59                 break;
  60         case 96000:
  61                 bclk = WM8753_BCLK_DIV_2;
  62                 pll_out = 12288000;
  63                 break;
  64         case 11025:
  65                 bclk = WM8753_BCLK_DIV_16;
  66                 pll_out = 11289600;
  67                 break;
  68         case 22050:
  69                 bclk = WM8753_BCLK_DIV_8;
  70                 pll_out = 11289600;
  71                 break;
  72         case 44100:
  73                 bclk = WM8753_BCLK_DIV_4;
  74                 pll_out = 11289600;
  75                 break;
  76         case 88200:
  77                 bclk = WM8753_BCLK_DIV_2;
  78                 pll_out = 11289600;
  79                 break;
  80         }
  81
  82         /* set codec DAI configuration */
  83         ret = snd_soc_dai_set_fmt(codec_dai,
  84                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  85                 SND_SOC_DAIFMT_CBM_CFM);
  86         if (ret < 0)
  87                 return ret;
  88
  89         /* set cpu DAI configuration */
  90         ret = snd_soc_dai_set_fmt(cpu_dai,
  91                 SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  92                 SND_SOC_DAIFMT_CBM_CFM);
  93         if (ret < 0)
  94                 return ret;
  95
  96         /* set the codec system clock for DAC and ADC */
  97         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
  98                 SND_SOC_CLOCK_IN);
  99         if (ret < 0)
 100                 return ret;
 101
 102         /* set MCLK division for sample rate */
 103         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 104                 S3C2410_IISMOD_32FS);
 105         if (ret < 0)
 106                 return ret;
 107
 108         /* set codec BCLK division for sample rate */
 109         ret = snd_soc_dai_set_clkdiv(codec_dai,
 110                                         WM8753_BCLKDIV, bclk);
 111         if (ret < 0)
 112                 return ret;
 113
 114         /* set prescaler division for sample rate */
 115         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 116                 S3C24XX_PRESCALE(4, 4));
 117         if (ret < 0)
 118                 return ret;
 119
 120         /* codec PLL input is PCLK/4 */
 121         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
 122                 iis_clkrate / 4, pll_out);
 123         if (ret < 0)
 124                 return ret;
 125
 126         return 0;
 127 }
 128
 129 static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
 130 {
 131         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 132         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 133
 134         /* disable the PLL */
 135         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
 136 }
 137
 138 /*
 139  * Neo1973 WM8753 HiFi DAI opserations.
 140  */
 141 static struct snd_soc_ops neo1973_gta02_hifi_ops = {
 142         .hw_params = neo1973_gta02_hifi_hw_params,
 143         .hw_free = neo1973_gta02_hifi_hw_free,
 144 };
 145
 146 static int neo1973_gta02_voice_hw_params(
 147         struct snd_pcm_substream *substream,
 148         struct snd_pcm_hw_params *params)
 149 {
 150         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 151         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 152         unsigned int pcmdiv = 0;
 153         int ret = 0;
 154         unsigned long iis_clkrate;
 155
 156         iis_clkrate = s3c24xx_i2s_get_clockrate();
 157
 158         if (params_rate(params) != 8000)
 159                 return -EINVAL;
 160         if (params_channels(params) != 1)
 161                 return -EINVAL;
 162
 163         pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
 164
 165         /* todo: gg check mode (DSP_B) against CSR datasheet */
 166         /* set codec DAI configuration */
 167         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
 168                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 169         if (ret < 0)
 170                 return ret;
 171
 172         /* set the codec system clock for DAC and ADC */
 173         ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
 174                 12288000, SND_SOC_CLOCK_IN);
 175         if (ret < 0)
 176                 return ret;
 177
 178         /* set codec PCM division for sample rate */
 179         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
 180                                         pcmdiv);
 181         if (ret < 0)
 182                 return ret;
 183
 184         /* configure and enable PLL for 12.288MHz output */
 185         ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
 186                 iis_clkrate / 4, 12288000);
 187         if (ret < 0)
 188                 return ret;
 189
 190         return 0;
 191 }
 192
 193 static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
 194 {
 195         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 196         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 197
 198         /* disable the PLL */
 199         return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
 200 }
 201
 202 static struct snd_soc_ops neo1973_gta02_voice_ops = {
 203         .hw_params = neo1973_gta02_voice_hw_params,
 204         .hw_free = neo1973_gta02_voice_hw_free,
 205 };
 206
 207 #define LM4853_AMP 1
 208 #define LM4853_SPK 2
 209
 210 static u8 lm4853_state;
 211
 212 /* This has no effect, it exists only to maintain compatibility with
 213  * existing ALSA state files.
 214  */
 215 static int lm4853_set_state(struct snd_kcontrol *kcontrol,
 216         struct snd_ctl_elem_value *ucontrol)
 217 {
 218         int val = ucontrol->value.integer.value[0];
 219
 220         if (val)
 221                 lm4853_state |= LM4853_AMP;
 222         else
 223                 lm4853_state &= ~LM4853_AMP;
 224
 225         return 0;
 226 }
 227
 228 static int lm4853_get_state(struct snd_kcontrol *kcontrol,
 229         struct snd_ctl_elem_value *ucontrol)
 230 {
 231         ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;
 232
 233         return 0;
 234 }
 235
 236 static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
 237         struct snd_ctl_elem_value *ucontrol)
 238 {
 239         int val = ucontrol->value.integer.value[0];
 240
 241         if (val) {
 242                 lm4853_state |= LM4853_SPK;
 243                 gpio_set_value(GTA02_GPIO_HP_IN, 0);
 244         } else {
 245                 lm4853_state &= ~LM4853_SPK;
 246                 gpio_set_value(GTA02_GPIO_HP_IN, 1);
 247         }
 248
 249         return 0;
 250 }
 251
 252 static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
 253         struct snd_ctl_elem_value *ucontrol)
 254 {
 255         ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;
 256
 257         return 0;
 258 }
 259
 260 static int lm4853_event(struct snd_soc_dapm_widget *w,
 261                         struct snd_kcontrol *k,
 262                         int event)
 263 {
 264         gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));
 265
 266         return 0;
 267 }
 268
 269 static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
 270         SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
 271         SND_SOC_DAPM_LINE("GSM Line Out", NULL),
 272         SND_SOC_DAPM_LINE("GSM Line In", NULL),
 273         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 274         SND_SOC_DAPM_MIC("Handset Mic", NULL),
 275         SND_SOC_DAPM_SPK("Handset Spk", NULL),
 276 };
 277
 278
 279 /* example machine audio_mapnections */
 280 static const struct snd_soc_dapm_route audio_map[] = {
 281
 282         /* Connections to the lm4853 amp */
 283         {"Stereo Out", NULL, "LOUT1"},
 284         {"Stereo Out", NULL, "ROUT1"},
 285
 286         /* Connections to the GSM Module */
 287         {"GSM Line Out", NULL, "MONO1"},
 288         {"GSM Line Out", NULL, "MONO2"},
 289         {"RXP", NULL, "GSM Line In"},
 290         {"RXN", NULL, "GSM Line In"},
 291
 292         /* Connections to Headset */
 293         {"MIC1", NULL, "Mic Bias"},
 294         {"Mic Bias", NULL, "Headset Mic"},
 295
 296         /* Call Mic */
 297         {"MIC2", NULL, "Mic Bias"},
 298         {"MIC2N", NULL, "Mic Bias"},
 299         {"Mic Bias", NULL, "Handset Mic"},
 300
 301         /* Call Speaker */
 302         {"Handset Spk", NULL, "LOUT2"},
 303         {"Handset Spk", NULL, "ROUT2"},
 304
 305         /* Connect the ALC pins */
 306         {"ACIN", NULL, "ACOP"},
 307 };
 308
 309 static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
 310         SOC_DAPM_PIN_SWITCH("Stereo Out"),
 311         SOC_DAPM_PIN_SWITCH("GSM Line Out"),
 312         SOC_DAPM_PIN_SWITCH("GSM Line In"),
 313         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 314         SOC_DAPM_PIN_SWITCH("Handset Mic"),
 315         SOC_DAPM_PIN_SWITCH("Handset Spk"),
 316
 317         /* This has no effect, it exists only to maintain compatibility with
 318          * existing ALSA state files.
 319          */
 320         SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
 321                 lm4853_get_state,
 322                 lm4853_set_state),
 323         SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
 324                 lm4853_get_spk,
 325                 lm4853_set_spk),
 326 };
 327
 328 /*
 329  * This is an example machine initialisation for a wm8753 connected to a
 330  * neo1973 GTA02.
 331  */
 332 static int neo1973_gta02_wm8753_init(struct snd_soc_pcm_runtime *rtd)
 333 {
 334         struct snd_soc_codec *codec = rtd->codec;
 335         struct snd_soc_dapm_context *dapm = &codec->dapm;
 336         int err;
 337
 338         /* set up NC codec pins */
 339         snd_soc_dapm_nc_pin(dapm, "OUT3");
 340         snd_soc_dapm_nc_pin(dapm, "OUT4");
 341         snd_soc_dapm_nc_pin(dapm, "LINE1");
 342         snd_soc_dapm_nc_pin(dapm, "LINE2");
 343
 344         /* Add neo1973 gta02 specific widgets */
 345         snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
 346                                   ARRAY_SIZE(wm8753_dapm_widgets));
 347
 348         /* add neo1973 gta02 specific controls */
 349         err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
 350                 ARRAY_SIZE(wm8753_neo1973_gta02_controls));
 351
 352         if (err < 0)
 353                 return err;
 354
 355         /* set up neo1973 gta02 specific audio path audio_map */
 356         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 357
 358         /* set endpoints to default off mode */
 359         snd_soc_dapm_disable_pin(dapm, "Stereo Out");
 360         snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
 361         snd_soc_dapm_disable_pin(dapm, "GSM Line In");
 362         snd_soc_dapm_disable_pin(dapm, "Headset Mic");
 363         snd_soc_dapm_disable_pin(dapm, "Handset Mic");
 364         snd_soc_dapm_disable_pin(dapm, "Handset Spk");
 365
 366         /* allow audio paths from the GSM modem to run during suspend */
 367         snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
 368         snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
 369         snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
 370         snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
 371         snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");
 372         snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");
 373
 374         snd_soc_dapm_sync(dapm);
 375
 376         return 0;
 377 }
 378
 379 /*
 380  * BT Codec DAI
 381  */
 382 static struct snd_soc_dai_driver bt_dai = {
 383         .name = "bluetooth-dai",
 384         .playback = {
 385                 .channels_min = 1,
 386                 .channels_max = 1,
 387                 .rates = SNDRV_PCM_RATE_8000,
 388                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 389         .capture = {
 390                 .channels_min = 1,
 391                 .channels_max = 1,
 392                 .rates = SNDRV_PCM_RATE_8000,
 393                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 394 };
 395
 396 static struct snd_soc_dai_link neo1973_gta02_dai[] = {
 397 { /* Hifi Playback - for similatious use with voice below */
 398         .name = "WM8753",
 399         .stream_name = "WM8753 HiFi",
 400         .cpu_dai_name = "s3c24xx-i2s",
 401         .codec_dai_name = "wm8753-hifi",
 402         .init = neo1973_gta02_wm8753_init,
 403         .platform_name = "samsung-audio",
 404         .codec_name = "wm8753-codec.0-0x1a",
 405         .ops = &neo1973_gta02_hifi_ops,
 406 },
 407 { /* Voice via BT */
 408         .name = "Bluetooth",
 409         .stream_name = "Voice",
 410         .cpu_dai_name = "bluetooth-dai",
 411         .codec_dai_name = "wm8753-voice",
 412         .ops = &neo1973_gta02_voice_ops,
 413         .codec_name = "wm8753-codec.0-0x1a",
 414         .platform_name = "samsung-audio",
 415 },
 416 };
 417
 418 static struct snd_soc_card neo1973_gta02 = {
 419         .name = "neo1973-gta02",
 420         .dai_link = neo1973_gta02_dai,
 421         .num_links = ARRAY_SIZE(neo1973_gta02_dai),
 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         neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
 437         if (!neo1973_gta02_snd_device)
 438                 return -ENOMEM;
 439
 440         /* register bluetooth DAI here */
 441         ret = snd_soc_register_dai(&neo1973_gta02_snd_device->dev, -1, &bt_dai);
 442         if (ret) {
 443                 platform_device_put(neo1973_gta02_snd_device);
 444                 return ret;
 445         }
 446
 447         platform_set_drvdata(neo1973_gta02_snd_device, &neo1973_gta02);
 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         ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
 457         if (ret) {
 458                 pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
 459                 goto err_unregister_device;
 460         }
 461
 462         ret = gpio_direction_output(GTA02_GPIO_HP_IN, 1);
 463         if (ret) {
 464                 pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
 465                 goto err_free_gpio_hp_in;
 466         }
 467
 468         ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
 469         if (ret) {
 470                 pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
 471                 goto err_free_gpio_hp_in;
 472         }
 473
 474         ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
 475         if (ret) {
 476                 pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
 477                 goto err_free_gpio_amp_shut;
 478         }
 479
 480         return 0;
 481
 482 err_free_gpio_amp_shut:
 483         gpio_free(GTA02_GPIO_AMP_SHUT);
 484 err_free_gpio_hp_in:
 485         gpio_free(GTA02_GPIO_HP_IN);
 486 err_unregister_device:
 487         platform_device_unregister(neo1973_gta02_snd_device);
 488         return ret;
 489 }
 490 module_init(neo1973_gta02_init);
 491
 492 static void __exit neo1973_gta02_exit(void)
 493 {
 494         snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev, -1);
 495         platform_device_unregister(neo1973_gta02_snd_device);
 496         gpio_free(GTA02_GPIO_HP_IN);
 497         gpio_free(GTA02_GPIO_AMP_SHUT);
 498 }
 499 module_exit(neo1973_gta02_exit);
 500
 501 /* Module information */
 502 MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
 503 MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
 504 MODULE_LICENSE("GPL");