linux/sound/soc/pxa/poodle.c
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   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 <lrg@slimlogic.co.uk>
   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/core.h>
  23#include <sound/pcm.h>
  24#include <sound/soc.h>
  25#include <sound/soc-dapm.h>
  26
  27#include <asm/mach-types.h>
  28#include <asm/hardware/locomo.h>
  29#include <mach/pxa-regs.h>
  30#include <mach/hardware.h>
  31#include <mach/poodle.h>
  32#include <mach/audio.h>
  33
  34#include "../codecs/wm8731.h"
  35#include "pxa2xx-pcm.h"
  36#include "pxa2xx-i2s.h"
  37
  38#define POODLE_HP        1
  39#define POODLE_HP_OFF    0
  40#define POODLE_SPK_ON    1
  41#define POODLE_SPK_OFF   0
  42
  43 /* audio clock in Hz - rounded from 12.235MHz */
  44#define POODLE_AUDIO_CLOCK 12288000
  45
  46static int poodle_jack_func;
  47static int poodle_spk_func;
  48
  49static void poodle_ext_control(struct snd_soc_codec *codec)
  50{
  51        /* set up jack connection */
  52        if (poodle_jack_func == POODLE_HP) {
  53                /* set = unmute headphone */
  54                locomo_gpio_write(&poodle_locomo_device.dev,
  55                        POODLE_LOCOMO_GPIO_MUTE_L, 1);
  56                locomo_gpio_write(&poodle_locomo_device.dev,
  57                        POODLE_LOCOMO_GPIO_MUTE_R, 1);
  58                snd_soc_dapm_enable_pin(codec, "Headphone Jack");
  59        } else {
  60                locomo_gpio_write(&poodle_locomo_device.dev,
  61                        POODLE_LOCOMO_GPIO_MUTE_L, 0);
  62                locomo_gpio_write(&poodle_locomo_device.dev,
  63                        POODLE_LOCOMO_GPIO_MUTE_R, 0);
  64                snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  65        }
  66
  67        /* set the enpoints to their new connetion states */
  68        if (poodle_spk_func == POODLE_SPK_ON)
  69                snd_soc_dapm_enable_pin(codec, "Ext Spk");
  70        else
  71                snd_soc_dapm_disable_pin(codec, "Ext Spk");
  72
  73        /* signal a DAPM event */
  74        snd_soc_dapm_sync(codec);
  75}
  76
  77static int poodle_startup(struct snd_pcm_substream *substream)
  78{
  79        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  80        struct snd_soc_codec *codec = rtd->socdev->codec;
  81
  82        /* check the jack status at stream startup */
  83        poodle_ext_control(codec);
  84        return 0;
  85}
  86
  87/* we need to unmute the HP at shutdown as the mute burns power on poodle */
  88static void poodle_shutdown(struct snd_pcm_substream *substream)
  89{
  90        /* set = unmute headphone */
  91        locomo_gpio_write(&poodle_locomo_device.dev,
  92                POODLE_LOCOMO_GPIO_MUTE_L, 1);
  93        locomo_gpio_write(&poodle_locomo_device.dev,
  94                POODLE_LOCOMO_GPIO_MUTE_R, 1);
  95}
  96
  97static int poodle_hw_params(struct snd_pcm_substream *substream,
  98        struct snd_pcm_hw_params *params)
  99{
 100        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 101        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 102        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 103        unsigned int clk = 0;
 104        int ret = 0;
 105
 106        switch (params_rate(params)) {
 107        case 8000:
 108        case 16000:
 109        case 48000:
 110        case 96000:
 111                clk = 12288000;
 112                break;
 113        case 11025:
 114        case 22050:
 115        case 44100:
 116                clk = 11289600;
 117                break;
 118        }
 119
 120        /* set codec DAI configuration */
 121        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 122                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 123        if (ret < 0)
 124                return ret;
 125
 126        /* set cpu DAI configuration */
 127        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 128                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 129        if (ret < 0)
 130                return ret;
 131
 132        /* set the codec system clock for DAC and ADC */
 133        ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, clk,
 134                SND_SOC_CLOCK_IN);
 135        if (ret < 0)
 136                return ret;
 137
 138        /* set the I2S system clock as input (unused) */
 139        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 140                SND_SOC_CLOCK_IN);
 141        if (ret < 0)
 142                return ret;
 143
 144        return 0;
 145}
 146
 147static struct snd_soc_ops poodle_ops = {
 148        .startup = poodle_startup,
 149        .hw_params = poodle_hw_params,
 150        .shutdown = poodle_shutdown,
 151};
 152
 153static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 154        struct snd_ctl_elem_value *ucontrol)
 155{
 156        ucontrol->value.integer.value[0] = poodle_jack_func;
 157        return 0;
 158}
 159
 160static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 161        struct snd_ctl_elem_value *ucontrol)
 162{
 163        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 164
 165        if (poodle_jack_func == ucontrol->value.integer.value[0])
 166                return 0;
 167
 168        poodle_jack_func = ucontrol->value.integer.value[0];
 169        poodle_ext_control(codec);
 170        return 1;
 171}
 172
 173static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 174        struct snd_ctl_elem_value *ucontrol)
 175{
 176        ucontrol->value.integer.value[0] = poodle_spk_func;
 177        return 0;
 178}
 179
 180static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 181        struct snd_ctl_elem_value *ucontrol)
 182{
 183        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 184
 185        if (poodle_spk_func == ucontrol->value.integer.value[0])
 186                return 0;
 187
 188        poodle_spk_func = ucontrol->value.integer.value[0];
 189        poodle_ext_control(codec);
 190        return 1;
 191}
 192
 193static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 194        struct snd_kcontrol *k, int event)
 195{
 196        if (SND_SOC_DAPM_EVENT_ON(event))
 197                locomo_gpio_write(&poodle_locomo_device.dev,
 198                        POODLE_LOCOMO_GPIO_AMP_ON, 0);
 199        else
 200                locomo_gpio_write(&poodle_locomo_device.dev,
 201                        POODLE_LOCOMO_GPIO_AMP_ON, 1);
 202
 203        return 0;
 204}
 205
 206/* poodle machine dapm widgets */
 207static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 208SND_SOC_DAPM_HP("Headphone Jack", NULL),
 209SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 210};
 211
 212/* Corgi machine connections to the codec pins */
 213static const struct snd_soc_dapm_route audio_map[] = {
 214
 215        /* headphone connected to LHPOUT1, RHPOUT1 */
 216        {"Headphone Jack", NULL, "LHPOUT"},
 217        {"Headphone Jack", NULL, "RHPOUT"},
 218
 219        /* speaker connected to LOUT, ROUT */
 220        {"Ext Spk", NULL, "ROUT"},
 221        {"Ext Spk", NULL, "LOUT"},
 222};
 223
 224static const char *jack_function[] = {"Off", "Headphone"};
 225static const char *spk_function[] = {"Off", "On"};
 226static const struct soc_enum poodle_enum[] = {
 227        SOC_ENUM_SINGLE_EXT(2, jack_function),
 228        SOC_ENUM_SINGLE_EXT(2, spk_function),
 229};
 230
 231static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 232        SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 233                poodle_set_jack),
 234        SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 235                poodle_set_spk),
 236};
 237
 238/*
 239 * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 240 */
 241static int poodle_wm8731_init(struct snd_soc_codec *codec)
 242{
 243        int i, err;
 244
 245        snd_soc_dapm_nc_pin(codec, "LLINEIN");
 246        snd_soc_dapm_nc_pin(codec, "RLINEIN");
 247        snd_soc_dapm_enable_pin(codec, "MICIN");
 248
 249        /* Add poodle specific controls */
 250        for (i = 0; i < ARRAY_SIZE(wm8731_poodle_controls); i++) {
 251                err = snd_ctl_add(codec->card,
 252                        snd_soc_cnew(&wm8731_poodle_controls[i], codec, NULL));
 253                if (err < 0)
 254                        return err;
 255        }
 256
 257        /* Add poodle specific widgets */
 258        snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
 259                                  ARRAY_SIZE(wm8731_dapm_widgets));
 260
 261        /* Set up poodle specific audio path audio_map */
 262        snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 263
 264        snd_soc_dapm_sync(codec);
 265        return 0;
 266}
 267
 268/* poodle digital audio interface glue - connects codec <--> CPU */
 269static struct snd_soc_dai_link poodle_dai = {
 270        .name = "WM8731",
 271        .stream_name = "WM8731",
 272        .cpu_dai = &pxa_i2s_dai,
 273        .codec_dai = &wm8731_dai,
 274        .init = poodle_wm8731_init,
 275        .ops = &poodle_ops,
 276};
 277
 278/* poodle audio machine driver */
 279static struct snd_soc_machine snd_soc_machine_poodle = {
 280        .name = "Poodle",
 281        .dai_link = &poodle_dai,
 282        .num_links = 1,
 283};
 284
 285/* poodle audio private data */
 286static struct wm8731_setup_data poodle_wm8731_setup = {
 287        .i2c_bus = 0,
 288        .i2c_address = 0x1b,
 289};
 290
 291/* poodle audio subsystem */
 292static struct snd_soc_device poodle_snd_devdata = {
 293        .machine = &snd_soc_machine_poodle,
 294        .platform = &pxa2xx_soc_platform,
 295        .codec_dev = &soc_codec_dev_wm8731,
 296        .codec_data = &poodle_wm8731_setup,
 297};
 298
 299static struct platform_device *poodle_snd_device;
 300
 301static int __init poodle_init(void)
 302{
 303        int ret;
 304
 305        if (!machine_is_poodle())
 306                return -ENODEV;
 307
 308        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 309                POODLE_LOCOMO_GPIO_AMP_ON, 0);
 310        /* should we mute HP at startup - burning power ?*/
 311        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 312                POODLE_LOCOMO_GPIO_MUTE_L, 0);
 313        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 314                POODLE_LOCOMO_GPIO_MUTE_R, 0);
 315
 316        poodle_snd_device = platform_device_alloc("soc-audio", -1);
 317        if (!poodle_snd_device)
 318                return -ENOMEM;
 319
 320        platform_set_drvdata(poodle_snd_device, &poodle_snd_devdata);
 321        poodle_snd_devdata.dev = &poodle_snd_device->dev;
 322        ret = platform_device_add(poodle_snd_device);
 323
 324        if (ret)
 325                platform_device_put(poodle_snd_device);
 326
 327        return ret;
 328}
 329
 330static void __exit poodle_exit(void)
 331{
 332        platform_device_unregister(poodle_snd_device);
 333}
 334
 335module_init(poodle_init);
 336module_exit(poodle_exit);
 337
 338/* Module information */
 339MODULE_AUTHOR("Richard Purdie");
 340MODULE_DESCRIPTION("ALSA SoC Poodle");
 341MODULE_LICENSE("GPL");
 342
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