318 lines
8.4 KiB
C
318 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* corgi.c -- SoC audio for Corgi
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*
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Copyright 2005 Openedhand Ltd.
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*
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* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
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* Richard Purdie <richard@openedhand.com>
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include <mach/corgi.h>
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#include <mach/audio.h>
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#include "../codecs/wm8731.h"
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#include "pxa2xx-i2s.h"
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#define CORGI_HP 0
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#define CORGI_MIC 1
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#define CORGI_LINE 2
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#define CORGI_HEADSET 3
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#define CORGI_HP_OFF 4
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#define CORGI_SPK_ON 0
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#define CORGI_SPK_OFF 1
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/* audio clock in Hz - rounded from 12.235MHz */
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#define CORGI_AUDIO_CLOCK 12288000
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static int corgi_jack_func;
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static int corgi_spk_func;
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static void corgi_ext_control(struct snd_soc_dapm_context *dapm)
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{
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snd_soc_dapm_mutex_lock(dapm);
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/* set up jack connection */
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switch (corgi_jack_func) {
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case CORGI_HP:
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/* set = unmute headphone */
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gpio_set_value(CORGI_GPIO_MUTE_L, 1);
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gpio_set_value(CORGI_GPIO_MUTE_R, 1);
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snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
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snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
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break;
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case CORGI_MIC:
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/* reset = mute headphone */
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gpio_set_value(CORGI_GPIO_MUTE_L, 0);
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gpio_set_value(CORGI_GPIO_MUTE_R, 0);
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snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
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break;
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case CORGI_LINE:
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gpio_set_value(CORGI_GPIO_MUTE_L, 0);
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gpio_set_value(CORGI_GPIO_MUTE_R, 0);
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snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
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snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
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break;
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case CORGI_HEADSET:
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gpio_set_value(CORGI_GPIO_MUTE_L, 0);
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gpio_set_value(CORGI_GPIO_MUTE_R, 1);
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snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
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snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
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snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
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break;
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}
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if (corgi_spk_func == CORGI_SPK_ON)
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snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
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else
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snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
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/* signal a DAPM event */
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snd_soc_dapm_sync_unlocked(dapm);
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snd_soc_dapm_mutex_unlock(dapm);
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}
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static int corgi_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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/* check the jack status at stream startup */
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corgi_ext_control(&rtd->card->dapm);
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return 0;
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}
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/* we need to unmute the HP at shutdown as the mute burns power on corgi */
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static void corgi_shutdown(struct snd_pcm_substream *substream)
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{
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/* set = unmute headphone */
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gpio_set_value(CORGI_GPIO_MUTE_L, 1);
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gpio_set_value(CORGI_GPIO_MUTE_R, 1);
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}
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static int corgi_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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unsigned int clk = 0;
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int ret = 0;
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switch (params_rate(params)) {
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case 8000:
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case 16000:
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case 48000:
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case 96000:
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clk = 12288000;
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break;
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case 11025:
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case 22050:
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case 44100:
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clk = 11289600;
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break;
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}
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/* set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* set the I2S system clock as input (unused) */
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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return 0;
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}
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static const struct snd_soc_ops corgi_ops = {
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.startup = corgi_startup,
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.hw_params = corgi_hw_params,
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.shutdown = corgi_shutdown,
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};
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static int corgi_get_jack(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.enumerated.item[0] = corgi_jack_func;
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return 0;
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}
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static int corgi_set_jack(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
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if (corgi_jack_func == ucontrol->value.enumerated.item[0])
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return 0;
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corgi_jack_func = ucontrol->value.enumerated.item[0];
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corgi_ext_control(&card->dapm);
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return 1;
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}
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static int corgi_get_spk(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.enumerated.item[0] = corgi_spk_func;
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return 0;
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}
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static int corgi_set_spk(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
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if (corgi_spk_func == ucontrol->value.enumerated.item[0])
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return 0;
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corgi_spk_func = ucontrol->value.enumerated.item[0];
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corgi_ext_control(&card->dapm);
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return 1;
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}
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static int corgi_amp_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static int corgi_mic_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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/* corgi machine dapm widgets */
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static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
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SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
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SND_SOC_DAPM_LINE("Line Jack", NULL),
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SND_SOC_DAPM_HP("Headset Jack", NULL),
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};
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/* Corgi machine audio map (connections to the codec pins) */
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static const struct snd_soc_dapm_route corgi_audio_map[] = {
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/* headset Jack - in = micin, out = LHPOUT*/
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{"Headset Jack", NULL, "LHPOUT"},
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/* headphone connected to LHPOUT1, RHPOUT1 */
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{"Headphone Jack", NULL, "LHPOUT"},
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{"Headphone Jack", NULL, "RHPOUT"},
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/* speaker connected to LOUT, ROUT */
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{"Ext Spk", NULL, "ROUT"},
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{"Ext Spk", NULL, "LOUT"},
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/* mic is connected to MICIN (via right channel of headphone jack) */
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{"MICIN", NULL, "Mic Jack"},
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/* Same as the above but no mic bias for line signals */
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{"MICIN", NULL, "Line Jack"},
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};
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static const char * const jack_function[] = {"Headphone", "Mic", "Line",
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"Headset", "Off"};
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static const char * const spk_function[] = {"On", "Off"};
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static const struct soc_enum corgi_enum[] = {
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SOC_ENUM_SINGLE_EXT(5, jack_function),
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SOC_ENUM_SINGLE_EXT(2, spk_function),
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};
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static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
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SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
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corgi_set_jack),
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SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
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corgi_set_spk),
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};
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/* corgi digital audio interface glue - connects codec <--> CPU */
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SND_SOC_DAILINK_DEFS(wm8731,
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DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
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DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
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DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
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static struct snd_soc_dai_link corgi_dai = {
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.name = "WM8731",
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.stream_name = "WM8731",
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &corgi_ops,
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SND_SOC_DAILINK_REG(wm8731),
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};
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/* corgi audio machine driver */
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static struct snd_soc_card corgi = {
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.name = "Corgi",
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.owner = THIS_MODULE,
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.dai_link = &corgi_dai,
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.num_links = 1,
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.controls = wm8731_corgi_controls,
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.num_controls = ARRAY_SIZE(wm8731_corgi_controls),
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.dapm_widgets = wm8731_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
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.dapm_routes = corgi_audio_map,
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.num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
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.fully_routed = true,
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};
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static int corgi_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &corgi;
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int ret;
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card->dev = &pdev->dev;
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ret = devm_snd_soc_register_card(&pdev->dev, card);
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if (ret)
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dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
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ret);
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return ret;
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}
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static struct platform_driver corgi_driver = {
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.driver = {
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.name = "corgi-audio",
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.pm = &snd_soc_pm_ops,
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},
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.probe = corgi_probe,
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};
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module_platform_driver(corgi_driver);
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/* Module information */
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MODULE_AUTHOR("Richard Purdie");
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MODULE_DESCRIPTION("ALSA SoC Corgi");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:corgi-audio");
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