LXR linux/sound/soc/pxa/poodle.c

   1/*
   2 * poodle.c  --  SoC audio for Poodle
   3 *
   4 * Copyright 2005 Wolfson Microelectronics PLC.
   5 * Copyright 2005 Openedhand Ltd.
   6 *
   7 * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
   8 *          Richard Purdie <richard@openedhand.com>
   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
  17#include <linux/module.h>
  18#include <linux/moduleparam.h>
  19#include <linux/timer.h>
  20#include <linux/interrupt.h>
  21#include <linux/platform_device.h>
  22#include <sound/driver.h>
  23#include <sound/core.h>
  24#include <sound/pcm.h>
  25#include <sound/soc.h>
  26#include <sound/soc-dapm.h>
  27
  28#include <asm/mach-types.h>
  29#include <asm/hardware/locomo.h>
  30#include <asm/arch/pxa-regs.h>
  31#include <asm/arch/hardware.h>
  32#include <asm/arch/poodle.h>
  33#include <asm/arch/audio.h>
  34
  35#include "../codecs/wm8731.h"
  36#include "pxa2xx-pcm.h"
  37#include "pxa2xx-i2s.h"
  38
  39#define POODLE_HP        1
  40#define POODLE_HP_OFF    0
  41#define POODLE_SPK_ON    1
  42#define POODLE_SPK_OFF   0
  43
  44 /* audio clock in Hz - rounded from 12.235MHz */
  45#define POODLE_AUDIO_CLOCK 12288000
  46
  47static int poodle_jack_func;
  48static int poodle_spk_func;
  49
  50static void poodle_ext_control(struct snd_soc_codec *codec)
  51{
  52        int spk = 0;
  53
  54        /* set up jack connection */
  55        if (poodle_jack_func == POODLE_HP) {
  56                /* set = unmute headphone */
  57                locomo_gpio_write(&poodle_locomo_device.dev,
  58                        POODLE_LOCOMO_GPIO_MUTE_L, 1);
  59                locomo_gpio_write(&poodle_locomo_device.dev,
  60                        POODLE_LOCOMO_GPIO_MUTE_R, 1);
  61                snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
  62        } else {
  63                locomo_gpio_write(&poodle_locomo_device.dev,
  64                        POODLE_LOCOMO_GPIO_MUTE_L, 0);
  65                locomo_gpio_write(&poodle_locomo_device.dev,
  66                        POODLE_LOCOMO_GPIO_MUTE_R, 0);
  67                snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 0);
  68        }
  69
  70        if (poodle_spk_func == POODLE_SPK_ON)
  71                spk = 1;
  72
  73        /* set the enpoints to their new connetion states */
  74        snd_soc_dapm_set_endpoint(codec, "Ext Spk", spk);
  75
  76        /* signal a DAPM event */
  77        snd_soc_dapm_sync_endpoints(codec);
  78}
  79
  80static int poodle_startup(struct snd_pcm_substream *substream)
  81{
  82        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  83        struct snd_soc_codec *codec = rtd->socdev->codec;
  84
  85        /* check the jack status at stream startup */
  86        poodle_ext_control(codec);
  87        return 0;
  88}
  89
  90/* we need to unmute the HP at shutdown as the mute burns power on poodle */
  91static int poodle_shutdown(struct snd_pcm_substream *substream)
  92{
  93        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  94        struct snd_soc_codec *codec = rtd->socdev->codec;
  95
  96        /* set = unmute headphone */
  97        locomo_gpio_write(&poodle_locomo_device.dev,
  98                POODLE_LOCOMO_GPIO_MUTE_L, 1);
  99        locomo_gpio_write(&poodle_locomo_device.dev,
 100                POODLE_LOCOMO_GPIO_MUTE_R, 1);
 101        return 0;
 102}
 103
 104static int poodle_hw_params(struct snd_pcm_substream *substream,
 105        struct snd_pcm_hw_params *params)
 106{
 107        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 108        struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
 109        struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
 110        unsigned int clk = 0;
 111        int ret = 0;
 112
 113        switch (params_rate(params)) {
 114        case 8000:
 115        case 16000:
 116        case 48000:
 117        case 96000:
 118                clk = 12288000;
 119                break;
 120        case 11025:
 121        case 22050:
 122        case 44100:
 123                clk = 11289600;
 124                break;
 125        }
 126
 127        /* set codec DAI configuration */
 128        ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 129                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 130        if (ret < 0)
 131                return ret;
 132
 133        /* set cpu DAI configuration */
 134        ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 135                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 136        if (ret < 0)
 137                return ret;
 138
 139        /* set the codec system clock for DAC and ADC */
 140        ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8731_SYSCLK, clk,
 141                SND_SOC_CLOCK_IN);
 142        if (ret < 0)
 143                return ret;
 144
 145        /* set the I2S system clock as input (unused) */
 146        ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 147                SND_SOC_CLOCK_IN);
 148        if (ret < 0)
 149                return ret;
 150
 151        return 0;
 152}
 153
 154static struct snd_soc_ops poodle_ops = {
 155        .startup = poodle_startup,
 156        .hw_params = poodle_hw_params,
 157        .shutdown = poodle_shutdown,
 158};
 159
 160static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 161        struct snd_ctl_elem_value *ucontrol)
 162{
 163        ucontrol->value.integer.value[0] = poodle_jack_func;
 164        return 0;
 165}
 166
 167static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 168        struct snd_ctl_elem_value *ucontrol)
 169{
 170        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 171
 172        if (poodle_jack_func == ucontrol->value.integer.value[0])
 173                return 0;
 174
 175        poodle_jack_func = ucontrol->value.integer.value[0];
 176        poodle_ext_control(codec);
 177        return 1;
 178}
 179
 180static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 181        struct snd_ctl_elem_value *ucontrol)
 182{
 183        ucontrol->value.integer.value[0] = poodle_spk_func;
 184        return 0;
 185}
 186
 187static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 188        struct snd_ctl_elem_value *ucontrol)
 189{
 190        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 191
 192        if (poodle_spk_func == ucontrol->value.integer.value[0])
 193                return 0;
 194
 195        poodle_spk_func = ucontrol->value.integer.value[0];
 196        poodle_ext_control(codec);
 197        return 1;
 198}
 199
 200static int poodle_amp_event(struct snd_soc_dapm_widget *w, int event)
 201{
 202        if (SND_SOC_DAPM_EVENT_ON(event))
 203                locomo_gpio_write(&poodle_locomo_device.dev,
 204                        POODLE_LOCOMO_GPIO_AMP_ON, 0);
 205        else
 206                locomo_gpio_write(&poodle_locomo_device.dev,
 207                        POODLE_LOCOMO_GPIO_AMP_ON, 1);
 208
 209        return 0;
 210}
 211
 212/* poodle machine dapm widgets */
 213static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 214SND_SOC_DAPM_HP("Headphone Jack", NULL),
 215SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 216};
 217
 218/* Corgi machine audio_mapnections to the codec pins */
 219static const char *audio_map[][3] = {
 220
 221        /* headphone connected to LHPOUT1, RHPOUT1 */
 222        {"Headphone Jack", NULL, "LHPOUT"},
 223        {"Headphone Jack", NULL, "RHPOUT"},
 224
 225        /* speaker connected to LOUT, ROUT */
 226        {"Ext Spk", NULL, "ROUT"},
 227        {"Ext Spk", NULL, "LOUT"},
 228
 229        {NULL, NULL, NULL},
 230};
 231
 232static const char *jack_function[] = {"Off", "Headphone"};
 233static const char *spk_function[] = {"Off", "On"};
 234static const struct soc_enum poodle_enum[] = {
 235        SOC_ENUM_SINGLE_EXT(2, jack_function),
 236        SOC_ENUM_SINGLE_EXT(2, spk_function),
 237};
 238
 239static const snd_kcontrol_new_t wm8731_poodle_controls[] = {
 240        SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 241                poodle_set_jack),
 242        SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 243                poodle_set_spk),
 244};
 245
 246/*
 247 * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 248 */
 249static int poodle_wm8731_init(struct snd_soc_codec *codec)
 250{
 251        int i, err;
 252
 253        snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
 254        snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
 255        snd_soc_dapm_set_endpoint(codec, "MICIN", 1);
 256
 257        /* Add poodle specific controls */
 258        for (i = 0; i < ARRAY_SIZE(wm8731_poodle_controls); i++) {
 259                err = snd_ctl_add(codec->card,
 260                        snd_soc_cnew(&wm8731_poodle_controls[i],codec, NULL));
 261                if (err < 0)
 262                        return err;
 263        }
 264
 265        /* Add poodle specific widgets */
 266        for (i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
 267                snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
 268        }
 269
 270        /* Set up poodle specific audio path audio_map */
 271        for (i = 0; audio_map[i][0] != NULL; i++) {
 272                snd_soc_dapm_connect_input(codec, audio_map[i][0],
 273                        audio_map[i][1], audio_map[i][2]);
 274        }
 275
 276        snd_soc_dapm_sync_endpoints(codec);
 277        return 0;
 278}
 279
 280/* poodle digital audio interface glue - connects codec <--> CPU */
 281static struct snd_soc_dai_link poodle_dai = {
 282        .name = "WM8731",
 283        .stream_name = "WM8731",
 284        .cpu_dai = &pxa_i2s_dai,
 285        .codec_dai = &wm8731_dai,
 286        .init = poodle_wm8731_init,
 287        .ops = &poodle_ops,
 288};
 289
 290/* poodle audio machine driver */
 291static struct snd_soc_machine snd_soc_machine_poodle = {
 292        .name = "Poodle",
 293        .dai_link = &poodle_dai,
 294        .num_links = 1,
 295};
 296
 297/* poodle audio private data */
 298static struct wm8731_setup_data poodle_wm8731_setup = {
 299        .i2c_address = 0x1b,
 300};
 301
 302/* poodle audio subsystem */
 303static struct snd_soc_device poodle_snd_devdata = {
 304        .machine = &snd_soc_machine_poodle,
 305        .platform = &pxa2xx_soc_platform,
 306        .codec_dev = &soc_codec_dev_wm8731,
 307        .codec_data = &poodle_wm8731_setup,
 308};
 309
 310static struct platform_device *poodle_snd_device;
 311
 312static int __init poodle_init(void)
 313{
 314        int ret;
 315
 316        if (!machine_is_poodle())
 317                return -ENODEV;
 318
 319        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 320                POODLE_LOCOMO_GPIO_AMP_ON, 0);
 321        /* should we mute HP at startup - burning power ?*/
 322        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 323                POODLE_LOCOMO_GPIO_MUTE_L, 0);
 324        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 325                POODLE_LOCOMO_GPIO_MUTE_R, 0);
 326
 327        poodle_snd_device = platform_device_alloc("soc-audio", -1);
 328        if (!poodle_snd_device)
 329                return -ENOMEM;
 330
 331        platform_set_drvdata(poodle_snd_device, &poodle_snd_devdata);
 332        poodle_snd_devdata.dev = &poodle_snd_device->dev;
 333        ret = platform_device_add(poodle_snd_device);
 334
 335        if (ret)
 336                platform_device_put(poodle_snd_device);
 337
 338        return ret;
 339}
 340
 341static void __exit poodle_exit(void)
 342{
 343        platform_device_unregister(poodle_snd_device);
 344}
 345
 346module_init(poodle_init);
 347module_exit(poodle_exit);
 348
 349/* Module information */
 350MODULE_AUTHOR("Richard Purdie");
 351MODULE_DESCRIPTION("ALSA SoC Poodle");
 352MODULE_LICENSE("GPL");
 353