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332 lines
9.0 KiB
332 lines
9.0 KiB
// 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 <[email protected]> |
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* Richard Purdie <[email protected]> |
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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 <linux/platform_data/asoc-pxa.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 struct gpio_desc *gpiod_mute_l, *gpiod_mute_r, |
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*gpiod_apm_on, *gpiod_mic_bias; |
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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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gpiod_set_value(gpiod_mute_l, 1); |
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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_mute_l, 0); |
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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_mute_l, 0); |
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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_mute_l, 0); |
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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_mute_l, 1); |
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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_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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gpiod_set_value(gpiod_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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gpiod_mute_l = devm_gpiod_get(&pdev->dev, "mute-l", GPIOD_OUT_HIGH); |
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if (IS_ERR(gpiod_mute_l)) |
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return PTR_ERR(gpiod_mute_l); |
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gpiod_mute_r = devm_gpiod_get(&pdev->dev, "mute-r", GPIOD_OUT_HIGH); |
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if (IS_ERR(gpiod_mute_r)) |
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return PTR_ERR(gpiod_mute_r); |
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gpiod_apm_on = devm_gpiod_get(&pdev->dev, "apm-on", GPIOD_OUT_LOW); |
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if (IS_ERR(gpiod_apm_on)) |
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return PTR_ERR(gpiod_apm_on); |
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gpiod_mic_bias = devm_gpiod_get(&pdev->dev, "mic-bias", GPIOD_OUT_LOW); |
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if (IS_ERR(gpiod_mic_bias)) |
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return PTR_ERR(gpiod_mic_bias); |
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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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