linux/sound/soc/pxa/poodle.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * poodle.c  --  SoC audio for Poodle
   4 *
   5 * Copyright 2005 Wolfson Microelectronics PLC.
   6 * Copyright 2005 Openedhand Ltd.
   7 *
   8 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
   9 *          Richard Purdie <richard@openedhand.com>
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/moduleparam.h>
  14#include <linux/timer.h>
  15#include <linux/i2c.h>
  16#include <linux/interrupt.h>
  17#include <linux/platform_device.h>
  18#include <sound/core.h>
  19#include <sound/pcm.h>
  20#include <sound/soc.h>
  21
  22#include <asm/mach-types.h>
  23#include <asm/hardware/locomo.h>
  24#include <mach/poodle.h>
  25#include <mach/audio.h>
  26
  27#include "../codecs/wm8731.h"
  28#include "pxa2xx-i2s.h"
  29
  30#define POODLE_HP        1
  31#define POODLE_HP_OFF    0
  32#define POODLE_SPK_ON    1
  33#define POODLE_SPK_OFF   0
  34
  35 /* audio clock in Hz - rounded from 12.235MHz */
  36#define POODLE_AUDIO_CLOCK 12288000
  37
  38static int poodle_jack_func;
  39static int poodle_spk_func;
  40
  41static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
  42{
  43        /* set up jack connection */
  44        if (poodle_jack_func == POODLE_HP) {
  45                /* set = unmute headphone */
  46                locomo_gpio_write(&poodle_locomo_device.dev,
  47                        POODLE_LOCOMO_GPIO_MUTE_L, 1);
  48                locomo_gpio_write(&poodle_locomo_device.dev,
  49                        POODLE_LOCOMO_GPIO_MUTE_R, 1);
  50                snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
  51        } else {
  52                locomo_gpio_write(&poodle_locomo_device.dev,
  53                        POODLE_LOCOMO_GPIO_MUTE_L, 0);
  54                locomo_gpio_write(&poodle_locomo_device.dev,
  55                        POODLE_LOCOMO_GPIO_MUTE_R, 0);
  56                snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  57        }
  58
  59        /* set the enpoints to their new connetion states */
  60        if (poodle_spk_func == POODLE_SPK_ON)
  61                snd_soc_dapm_enable_pin(dapm, "Ext Spk");
  62        else
  63                snd_soc_dapm_disable_pin(dapm, "Ext Spk");
  64
  65        /* signal a DAPM event */
  66        snd_soc_dapm_sync(dapm);
  67}
  68
  69static int poodle_startup(struct snd_pcm_substream *substream)
  70{
  71        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  72
  73        /* check the jack status at stream startup */
  74        poodle_ext_control(&rtd->card->dapm);
  75
  76        return 0;
  77}
  78
  79/* we need to unmute the HP at shutdown as the mute burns power on poodle */
  80static void poodle_shutdown(struct snd_pcm_substream *substream)
  81{
  82        /* set = unmute headphone */
  83        locomo_gpio_write(&poodle_locomo_device.dev,
  84                POODLE_LOCOMO_GPIO_MUTE_L, 1);
  85        locomo_gpio_write(&poodle_locomo_device.dev,
  86                POODLE_LOCOMO_GPIO_MUTE_R, 1);
  87}
  88
  89static int poodle_hw_params(struct snd_pcm_substream *substream,
  90        struct snd_pcm_hw_params *params)
  91{
  92        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  93        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  94        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  95        unsigned int clk = 0;
  96        int ret = 0;
  97
  98        switch (params_rate(params)) {
  99        case 8000:
 100        case 16000:
 101        case 48000:
 102        case 96000:
 103                clk = 12288000;
 104                break;
 105        case 11025:
 106        case 22050:
 107        case 44100:
 108                clk = 11289600;
 109                break;
 110        }
 111
 112        /* set the codec system clock for DAC and ADC */
 113        ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 114                SND_SOC_CLOCK_IN);
 115        if (ret < 0)
 116                return ret;
 117
 118        /* set the I2S system clock as input (unused) */
 119        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 120                SND_SOC_CLOCK_IN);
 121        if (ret < 0)
 122                return ret;
 123
 124        return 0;
 125}
 126
 127static const struct snd_soc_ops poodle_ops = {
 128        .startup = poodle_startup,
 129        .hw_params = poodle_hw_params,
 130        .shutdown = poodle_shutdown,
 131};
 132
 133static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 134        struct snd_ctl_elem_value *ucontrol)
 135{
 136        ucontrol->value.enumerated.item[0] = poodle_jack_func;
 137        return 0;
 138}
 139
 140static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 141        struct snd_ctl_elem_value *ucontrol)
 142{
 143        struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
 144
 145        if (poodle_jack_func == ucontrol->value.enumerated.item[0])
 146                return 0;
 147
 148        poodle_jack_func = ucontrol->value.enumerated.item[0];
 149        poodle_ext_control(&card->dapm);
 150        return 1;
 151}
 152
 153static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 154        struct snd_ctl_elem_value *ucontrol)
 155{
 156        ucontrol->value.enumerated.item[0] = poodle_spk_func;
 157        return 0;
 158}
 159
 160static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 161        struct snd_ctl_elem_value *ucontrol)
 162{
 163        struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
 164
 165        if (poodle_spk_func == ucontrol->value.enumerated.item[0])
 166                return 0;
 167
 168        poodle_spk_func = ucontrol->value.enumerated.item[0];
 169        poodle_ext_control(&card->dapm);
 170        return 1;
 171}
 172
 173static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 174        struct snd_kcontrol *k, int event)
 175{
 176        if (SND_SOC_DAPM_EVENT_ON(event))
 177                locomo_gpio_write(&poodle_locomo_device.dev,
 178                        POODLE_LOCOMO_GPIO_AMP_ON, 0);
 179        else
 180                locomo_gpio_write(&poodle_locomo_device.dev,
 181                        POODLE_LOCOMO_GPIO_AMP_ON, 1);
 182
 183        return 0;
 184}
 185
 186/* poodle machine dapm widgets */
 187static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 188SND_SOC_DAPM_HP("Headphone Jack", NULL),
 189SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 190SND_SOC_DAPM_MIC("Microphone", NULL),
 191};
 192
 193/* Corgi machine connections to the codec pins */
 194static const struct snd_soc_dapm_route poodle_audio_map[] = {
 195
 196        /* headphone connected to LHPOUT1, RHPOUT1 */
 197        {"Headphone Jack", NULL, "LHPOUT"},
 198        {"Headphone Jack", NULL, "RHPOUT"},
 199
 200        /* speaker connected to LOUT, ROUT */
 201        {"Ext Spk", NULL, "ROUT"},
 202        {"Ext Spk", NULL, "LOUT"},
 203
 204        {"MICIN", NULL, "Microphone"},
 205};
 206
 207static const char * const jack_function[] = {"Off", "Headphone"};
 208static const char * const spk_function[] = {"Off", "On"};
 209static const struct soc_enum poodle_enum[] = {
 210        SOC_ENUM_SINGLE_EXT(2, jack_function),
 211        SOC_ENUM_SINGLE_EXT(2, spk_function),
 212};
 213
 214static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 215        SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 216                poodle_set_jack),
 217        SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 218                poodle_set_spk),
 219};
 220
 221/* poodle digital audio interface glue - connects codec <--> CPU */
 222SND_SOC_DAILINK_DEFS(wm8731,
 223        DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
 224        DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
 225        DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
 226
 227static struct snd_soc_dai_link poodle_dai = {
 228        .name = "WM8731",
 229        .stream_name = "WM8731",
 230        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 231                   SND_SOC_DAIFMT_CBS_CFS,
 232        .ops = &poodle_ops,
 233        SND_SOC_DAILINK_REG(wm8731),
 234};
 235
 236/* poodle audio machine driver */
 237static struct snd_soc_card poodle = {
 238        .name = "Poodle",
 239        .dai_link = &poodle_dai,
 240        .num_links = 1,
 241        .owner = THIS_MODULE,
 242
 243        .controls = wm8731_poodle_controls,
 244        .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
 245        .dapm_widgets = wm8731_dapm_widgets,
 246        .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 247        .dapm_routes = poodle_audio_map,
 248        .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
 249        .fully_routed = true,
 250};
 251
 252static int poodle_probe(struct platform_device *pdev)
 253{
 254        struct snd_soc_card *card = &poodle;
 255        int ret;
 256
 257        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 258                POODLE_LOCOMO_GPIO_AMP_ON, 0);
 259        /* should we mute HP at startup - burning power ?*/
 260        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 261                POODLE_LOCOMO_GPIO_MUTE_L, 0);
 262        locomo_gpio_set_dir(&poodle_locomo_device.dev,
 263                POODLE_LOCOMO_GPIO_MUTE_R, 0);
 264
 265        card->dev = &pdev->dev;
 266
 267        ret = devm_snd_soc_register_card(&pdev->dev, card);
 268        if (ret)
 269                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 270                        ret);
 271        return ret;
 272}
 273
 274static struct platform_driver poodle_driver = {
 275        .driver         = {
 276                .name   = "poodle-audio",
 277                .pm     = &snd_soc_pm_ops,
 278        },
 279        .probe          = poodle_probe,
 280};
 281
 282module_platform_driver(poodle_driver);
 283
 284/* Module information */
 285MODULE_AUTHOR("Richard Purdie");
 286MODULE_DESCRIPTION("ALSA SoC Poodle");
 287MODULE_LICENSE("GPL");
 288MODULE_ALIAS("platform:poodle-audio");
 289
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