From cb917407633dd41042ba6961a878fd99bd2cb118 Mon Sep 17 00:00:00 2001 From: Raashid Muhammed Date: Mon, 27 Mar 2017 12:35:00 +0530 Subject: [PATCH] Add support for Allo Piano DAC 2.1 plus add-on board for Raspberry Pi. The Piano DAC 2.1 has support for 4 channels with subwoofer. Signed-off-by: Baswaraj K Reviewed-by: Vijay Kumar B. Reviewed-by: Raashid Muhammed Add clock changes and mute gpios (#1938) Also improve code style and adhere to ALSA coding conventions. Signed-off-by: Baswaraj K Reviewed-by: Vijay Kumar B. Reviewed-by: Raashid Muhammed PianoPlus: Dual Mono & Dual Stereo features added (#2069) --- sound/soc/bcm/Kconfig | 7 + sound/soc/bcm/Makefile | 2 + sound/soc/bcm/allo-piano-dac-plus.c | 805 ++++++++++++++++++++++++++++ 3 files changed, 814 insertions(+) create mode 100644 sound/soc/bcm/allo-piano-dac-plus.c diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig index b600cfb98ac9..58c36f2e7bb7 100644 --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -131,3 +131,10 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC select SND_SOC_PCM512x_I2C help Say Y or M if you want to add support for Allo Piano DAC. + +config SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS + tristate "Support for Allo Piano DAC Plus" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + select SND_SOC_PCM512x_I2C + help + Say Y or M if you want to add support for Allo Piano DAC Plus. diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile index 64f007f8ba38..023b2c17098b 100644 --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -25,6 +25,7 @@ snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o snd-soc-dionaudio-loco-objs := dionaudio_loco.o snd-soc-allo-piano-dac-objs := allo-piano-dac.o +snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o @@ -42,3 +43,4 @@ obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundca obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o +obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o diff --git a/sound/soc/bcm/allo-piano-dac-plus.c b/sound/soc/bcm/allo-piano-dac-plus.c new file mode 100644 index 000000000000..d4e99e3c6a38 --- /dev/null +++ b/sound/soc/bcm/allo-piano-dac-plus.c @@ -0,0 +1,805 @@ +/* + * ALSA ASoC Machine Driver for Allo Piano DAC Plus Subwoofer + * + * Author: Baswaraj K + * Copyright 2016 + * based on code by Daniel Matuschek + * based on code by Florian Meier + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../codecs/pcm512x.h" + +struct dsp_code { + char i2c_addr; + char offset; + char val; +}; + +struct glb_pool { + struct mutex lock; + unsigned int dual_mode; + unsigned int set_lowpass; + unsigned int set_mode; + unsigned int set_rate; + unsigned int dsp_page_number; +}; + +static bool digital_gain_0db_limit = true; +bool glb_mclk; + +static struct gpio_desc *mute_gpio[2]; + +static const char * const allo_piano_mode_texts[] = { + "None", + "2.0", + "2.1", + "2.2", +}; + +static const SOC_ENUM_SINGLE_DECL(allo_piano_mode_enum, + 0, 0, allo_piano_mode_texts); + +static const char * const allo_piano_dual_mode_texts[] = { + "None", + "Dual-Mono", + "Dual-Stereo", +}; + +static const SOC_ENUM_SINGLE_DECL(allo_piano_dual_mode_enum, + 0, 0, allo_piano_dual_mode_texts); + +static const char * const allo_piano_dsp_low_pass_texts[] = { + "60", + "70", + "80", + "90", + "100", + "110", + "120", + "130", + "140", + "150", + "160", + "170", + "180", + "190", + "200", +}; + +static const SOC_ENUM_SINGLE_DECL(allo_piano_enum, + 0, 0, allo_piano_dsp_low_pass_texts); + +static int __snd_allo_piano_dsp_program(struct snd_soc_pcm_runtime *rtd, + unsigned int mode, unsigned int rate, unsigned int lowpass) +{ + const struct firmware *fw; + struct snd_soc_card *card = rtd->card; + struct glb_pool *glb_ptr = card->drvdata; + char firmware_name[60]; + int ret = 0, dac = 0; + + if (rate <= 46000) + rate = 44100; + else if (rate <= 68000) + rate = 48000; + else if (rate <= 92000) + rate = 88200; + else if (rate <= 136000) + rate = 96000; + else if (rate <= 184000) + rate = 176400; + else + rate = 192000; + + if (lowpass > 14) + glb_ptr->set_lowpass = lowpass = 3; + + if (mode > 3) + glb_ptr->set_mode = mode = 0; + + if (mode > 0) + glb_ptr->dual_mode = 0; + + /* same configuration loaded */ + if ((rate == glb_ptr->set_rate) && (lowpass == glb_ptr->set_lowpass) + && (mode == glb_ptr->set_mode)) + return 0; + + switch (mode) { + case 0: /* None */ + return 1; + + case 1: /* 2.0 */ + snd_soc_write(rtd->codec_dais[0]->codec, PCM512x_MUTE, 0x00); + snd_soc_write(rtd->codec_dais[1]->codec, PCM512x_MUTE, 0x11); + glb_ptr->set_rate = rate; + glb_ptr->set_mode = mode; + glb_ptr->set_lowpass = lowpass; + return 1; + + default: + snd_soc_write(rtd->codec_dais[0]->codec, PCM512x_MUTE, 0x00); + snd_soc_write(rtd->codec_dais[1]->codec, PCM512x_MUTE, 0x00); + } + + for (dac = 0; dac < rtd->num_codecs; dac++) { + struct dsp_code *dsp_code_read; + struct snd_soc_codec *codec = rtd->codec_dais[dac]->codec; + int i = 1; + + if (dac == 0) { /* high */ + snprintf(firmware_name, sizeof(firmware_name), + "allo/piano/2.2/allo-piano-dsp-%d-%d-%d.bin", + rate, ((lowpass * 10) + 60), dac); + } else { /* low */ + snprintf(firmware_name, sizeof(firmware_name), + "allo/piano/2.%d/allo-piano-dsp-%d-%d-%d.bin", + (mode - 1), rate, ((lowpass * 10) + 60), dac); + } + + dev_info(codec->dev, "Dsp Firmware File Name: %s\n", + firmware_name); + + ret = request_firmware(&fw, firmware_name, codec->dev); + if (ret < 0) { + dev_err(codec->dev, + "Error: Allo Piano Firmware %s missing. %d\n", + firmware_name, ret); + goto err; + } + + while (i < (fw->size - 1)) { + dsp_code_read = (struct dsp_code *)&fw->data[i]; + + if (dsp_code_read->offset == 0) { + glb_ptr->dsp_page_number = dsp_code_read->val; + ret = snd_soc_write(rtd->codec_dais[dac]->codec, + PCM512x_PAGE_BASE(0), + dsp_code_read->val); + + } else if (dsp_code_read->offset != 0) { + ret = snd_soc_write(rtd->codec_dais[dac]->codec, + (PCM512x_PAGE_BASE( + glb_ptr->dsp_page_number) + + dsp_code_read->offset), + dsp_code_read->val); + } + if (ret < 0) { + dev_err(codec->dev, + "Failed to write Register: %d\n", ret); + release_firmware(fw); + goto err; + } + i = i + 3; + } + release_firmware(fw); + } + glb_ptr->set_rate = rate; + glb_ptr->set_mode = mode; + glb_ptr->set_lowpass = lowpass; + return 1; + +err: + return ret; +} + +static int snd_allo_piano_dsp_program(struct snd_soc_pcm_runtime *rtd, + unsigned int mode, unsigned int rate, unsigned int lowpass) +{ + struct snd_soc_card *card = rtd->card; + struct glb_pool *glb_ptr = card->drvdata; + int ret = 0; + + mutex_lock(&glb_ptr->lock); + + ret = __snd_allo_piano_dsp_program(rtd, + mode, rate, lowpass); + mutex_unlock(&glb_ptr->lock); + + return ret; +} + +static int snd_allo_piano_dual_mode_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct glb_pool *glb_ptr = card->drvdata; + + ucontrol->value.integer.value[0] = glb_ptr->dual_mode; + + return 0; +} + +static int snd_allo_piano_dual_mode_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct glb_pool *glb_ptr = card->drvdata; + struct snd_soc_pcm_runtime *rtd; + struct snd_card *snd_card_ptr = card->snd_card; + struct snd_kcontrol *kctl; + struct soc_mixer_control *mc; + unsigned int left_val = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + + if (ucontrol->value.integer.value[0] > 0) { + glb_ptr->dual_mode = ucontrol->value.integer.value[0]; + glb_ptr->set_mode = 0; + } else if (ucontrol->value.integer.value[0] <= 0) { + if (glb_ptr->set_mode <= 0) { + glb_ptr->dual_mode = 1; + glb_ptr->set_mode = 0; + } + } else { + glb_ptr->dual_mode = 0; + return 0; + } + + if (glb_ptr->dual_mode == 1) { + snd_soc_write(rtd->codec_dais[0]->codec, PCM512x_MUTE, 0x01); + snd_soc_write(rtd->codec_dais[1]->codec, PCM512x_MUTE, 0x10); + snd_soc_write(rtd->codec_dais[0]->codec, + PCM512x_DIGITAL_VOLUME_3, 0xff); + + list_for_each_entry(kctl, &snd_card_ptr->controls, list) { + if (!strncmp(kctl->id.name, "Digital Playback Volume", + sizeof(kctl->id.name))) { + mc = (struct soc_mixer_control *) + kctl->private_value; + mc->rreg = mc->reg; + break; + } + } + } else { + left_val = snd_soc_read(rtd->codec_dais[0]->codec, + PCM512x_DIGITAL_VOLUME_2); + list_for_each_entry(kctl, &snd_card_ptr->controls, list) { + if (!strncmp(kctl->id.name, "Digital Playback Volume", + sizeof(kctl->id.name))) { + mc = (struct soc_mixer_control *) + kctl->private_value; + mc->rreg = PCM512x_DIGITAL_VOLUME_3; + break; + } + } + + snd_soc_write(rtd->codec_dais[0]->codec, + PCM512x_DIGITAL_VOLUME_3, left_val); + snd_soc_write(rtd->codec_dais[0]->codec, PCM512x_MUTE, 0x00); + snd_soc_write(rtd->codec_dais[1]->codec, PCM512x_MUTE, 0x00); + } + + return 0; +} + +static int snd_allo_piano_mode_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct glb_pool *glb_ptr = card->drvdata; + + ucontrol->value.integer.value[0] = glb_ptr->set_mode; + return 0; +} + +static int snd_allo_piano_mode_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + struct glb_pool *glb_ptr = card->drvdata; + struct snd_card *snd_card_ptr = card->snd_card; + struct snd_kcontrol *kctl; + struct soc_mixer_control *mc; + unsigned int left_val = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + + if ((glb_ptr->dual_mode == 1) && + (ucontrol->value.integer.value[0] > 0)) { + left_val = snd_soc_read(rtd->codec_dais[0]->codec, + PCM512x_DIGITAL_VOLUME_2); + list_for_each_entry(kctl, &snd_card_ptr->controls, list) { + if (!strncmp(kctl->id.name, "Digital Playback Volume", + sizeof(kctl->id.name))) { + mc = (struct soc_mixer_control *) + kctl->private_value; + mc->rreg = PCM512x_DIGITAL_VOLUME_3; + break; + } + } + snd_soc_write(rtd->codec_dais[0]->codec, + PCM512x_DIGITAL_VOLUME_3, left_val); + } + + return(snd_allo_piano_dsp_program(rtd, + ucontrol->value.integer.value[0], + glb_ptr->set_rate, glb_ptr->set_lowpass)); +} + +static int snd_allo_piano_lowpass_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct glb_pool *glb_ptr = card->drvdata; + + ucontrol->value.integer.value[0] = glb_ptr->set_lowpass; + return 0; +} + +static int snd_allo_piano_lowpass_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + struct glb_pool *glb_ptr = card->drvdata; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + return(snd_allo_piano_dsp_program(rtd, + glb_ptr->set_mode, glb_ptr->set_rate, + ucontrol->value.integer.value[0])); +} + +static int pcm512x_get_reg_sub(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + unsigned int left_val = 0; + unsigned int right_val = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + left_val = snd_soc_read(rtd->codec_dais[1]->codec, + PCM512x_DIGITAL_VOLUME_2); + if (left_val < 0) + return left_val; + + right_val = snd_soc_read(rtd->codec_dais[1]->codec, + PCM512x_DIGITAL_VOLUME_3); + if (right_val < 0) + return right_val; + + ucontrol->value.integer.value[0] = + (~(left_val >> mc->shift)) & mc->max; + ucontrol->value.integer.value[1] = + (~(right_val >> mc->shift)) & mc->max; + + return 0; +} + +static int pcm512x_set_reg_sub(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + unsigned int left_val = (ucontrol->value.integer.value[0] & mc->max); + unsigned int right_val = (ucontrol->value.integer.value[1] & mc->max); + int ret = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + ret = snd_soc_write(rtd->codec_dais[1]->codec, + PCM512x_DIGITAL_VOLUME_2, (~left_val)); + if (ret < 0) + return ret; + + ret = snd_soc_write(rtd->codec_dais[1]->codec, + PCM512x_DIGITAL_VOLUME_3, (~right_val)); + if (ret < 0) + return ret; + + return 1; +} + +static int pcm512x_get_reg_sub_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + int val = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + val = snd_soc_read(rtd->codec_dais[1]->codec, PCM512x_MUTE); + if (val < 0) + return val; + + ucontrol->value.integer.value[0] = (val & 0x10) ? 0 : 1; + ucontrol->value.integer.value[1] = (val & 0x01) ? 0 : 1; + + return val; +} + +static int pcm512x_set_reg_sub_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + struct snd_soc_pcm_runtime *rtd; + unsigned int left_val = (ucontrol->value.integer.value[0]); + unsigned int right_val = (ucontrol->value.integer.value[1]); + int ret = 0; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + ret = snd_soc_write(rtd->codec_dais[1]->codec, PCM512x_MUTE, + ~((left_val & 0x01)<<4 | (right_val & 0x01))); + if (ret < 0) + return ret; + + return 1; + +} + +static const DECLARE_TLV_DB_SCALE(digital_tlv_sub, -10350, 50, 1); + +static const struct snd_kcontrol_new allo_piano_controls[] = { + SOC_ENUM_EXT("Subwoofer mode Route", + allo_piano_mode_enum, + snd_allo_piano_mode_get, + snd_allo_piano_mode_put), + + SOC_ENUM_EXT("Dual Mode Route", + allo_piano_dual_mode_enum, + snd_allo_piano_dual_mode_get, + snd_allo_piano_dual_mode_put), + + SOC_ENUM_EXT("Lowpass Route", allo_piano_enum, + snd_allo_piano_lowpass_get, + snd_allo_piano_lowpass_put), + + SOC_DOUBLE_R_EXT_TLV("Subwoofer Playback Volume", + PCM512x_DIGITAL_VOLUME_2, + PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, + pcm512x_get_reg_sub, + pcm512x_set_reg_sub, + digital_tlv_sub), + + SOC_DOUBLE_EXT("Subwoofer Playback Switch", + PCM512x_MUTE, + PCM512x_RQML_SHIFT, + PCM512x_RQMR_SHIFT, 1, 1, + pcm512x_get_reg_sub_switch, + pcm512x_set_reg_sub_switch), +}; + +static int snd_allo_piano_dac_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct glb_pool *glb_ptr; + + glb_ptr = kmalloc(sizeof(struct glb_pool), GFP_KERNEL); + if (!glb_ptr) + return -ENOMEM; + + memset(glb_ptr, 0x00, sizeof(glb_ptr)); + card->drvdata = glb_ptr; + + mutex_init(&glb_ptr->lock); + + if (digital_gain_0db_limit) { + int ret; + + ret = snd_soc_limit_volume(card, "Digital Playback Volume", + 207); + if (ret < 0) + dev_warn(card->dev, "Failed to set volume limit: %d\n", + ret); + } + + return 0; +} + +static void snd_allo_piano_gpio_mute(struct snd_soc_card *card) +{ + if (mute_gpio[0]) + gpiod_set_value_cansleep(mute_gpio[0], 1); + + if (mute_gpio[1]) + gpiod_set_value_cansleep(mute_gpio[1], 1); +} + +static void snd_allo_piano_gpio_unmute(struct snd_soc_card *card) +{ + if (mute_gpio[0]) + gpiod_set_value_cansleep(mute_gpio[0], 0); + + if (mute_gpio[1]) + gpiod_set_value_cansleep(mute_gpio[1], 0); +} + +static int snd_allo_piano_set_bias_level(struct snd_soc_card *card, + struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) +{ + struct snd_soc_pcm_runtime *rtd; + struct snd_soc_dai *codec_dai; + + rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name); + codec_dai = rtd->codec_dai; + + if (dapm->dev != codec_dai->dev) + return 0; + + switch (level) { + case SND_SOC_BIAS_PREPARE: + if (dapm->bias_level != SND_SOC_BIAS_STANDBY) + break; + /* UNMUTE DAC */ + snd_allo_piano_gpio_unmute(card); + break; + + case SND_SOC_BIAS_STANDBY: + if (dapm->bias_level != SND_SOC_BIAS_PREPARE) + break; + /* MUTE DAC */ + snd_allo_piano_gpio_mute(card); + break; + + default: + break; + } + + return 0; +} + +static int snd_allo_piano_dac_startup( + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_card *card = rtd->card; + + snd_allo_piano_gpio_mute(card); + + return 0; +} + +static int snd_allo_piano_dac_hw_params( + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int sample_bits = + snd_pcm_format_physical_width(params_format(params)); + unsigned int rate = params_rate(params); + struct snd_soc_card *card = rtd->card; + struct glb_pool *glb_ptr = card->drvdata; + int ret = 0, val = 0, dac; + + for (dac = 0; (glb_mclk && dac < 2); dac++) { + /* Configure the PLL clock reference for both the Codecs */ + val = snd_soc_read(rtd->codec_dais[dac]->codec, + PCM512x_RATE_DET_4); + if (val < 0) { + dev_err(rtd->codec_dais[dac]->codec->dev, + "Failed to read register PCM512x_RATE_DET_4\n"); + return val; + } + + if (val & 0x40) { + snd_soc_write(rtd->codec_dais[dac]->codec, + PCM512x_PLL_REF, + PCM512x_SREF_BCK); + + dev_info(rtd->codec_dais[dac]->codec->dev, + "Setting BCLK as input clock & Enable PLL\n"); + } else { + snd_soc_write(rtd->codec_dais[dac]->codec, + PCM512x_PLL_EN, + 0x00); + + snd_soc_write(rtd->codec_dais[dac]->codec, + PCM512x_PLL_REF, + PCM512x_SREF_SCK); + + dev_info(rtd->codec_dais[dac]->codec->dev, + "Setting SCLK as input clock & disabled PLL\n"); + } + } + + if (digital_gain_0db_limit) { + ret = snd_soc_limit_volume(card, + "Subwoofer Playback Volume", 207); + if (ret < 0) + dev_warn(card->dev, "Failed to set volume limit: %d\n", + ret); + } + + ret = snd_allo_piano_dsp_program(rtd, glb_ptr->set_mode, rate, + glb_ptr->set_lowpass); + if (ret < 0) + return ret; + + ret = snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); + + return ret; +} + +static int snd_allo_piano_dac_prepare( + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_card *card = rtd->card; + + snd_allo_piano_gpio_unmute(card); + + return 0; +} + +/* machine stream operations */ +static struct snd_soc_ops snd_allo_piano_dac_ops = { + .startup = snd_allo_piano_dac_startup, + .hw_params = snd_allo_piano_dac_hw_params, + .prepare = snd_allo_piano_dac_prepare, +}; + +static struct snd_soc_dai_link_component allo_piano_2_1_codecs[] = { + { + .dai_name = "pcm512x-hifi", + }, + { + .dai_name = "pcm512x-hifi", + }, +}; + +static struct snd_soc_dai_link snd_allo_piano_dac_dai[] = { + { + .name = "PianoDACPlus", + .stream_name = "PianoDACPlus", + .cpu_dai_name = "bcm2708-i2s.0", + .platform_name = "bcm2708-i2s.0", + .codecs = allo_piano_2_1_codecs, + .num_codecs = 2, + .dai_fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &snd_allo_piano_dac_ops, + .init = snd_allo_piano_dac_init, + }, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_allo_piano_dac = { + .name = "PianoDACPlus", + .owner = THIS_MODULE, + .dai_link = snd_allo_piano_dac_dai, + .num_links = ARRAY_SIZE(snd_allo_piano_dac_dai), + .controls = allo_piano_controls, + .num_controls = ARRAY_SIZE(allo_piano_controls), +}; + +static int snd_allo_piano_dac_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_allo_piano_dac; + int ret = 0, i = 0; + + card->dev = &pdev->dev; + platform_set_drvdata(pdev, &snd_allo_piano_dac); + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai; + + dai = &snd_allo_piano_dac_dai[0]; + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + if (i2s_node) { + for (i = 0; i < card->num_links; i++) { + dai->cpu_dai_name = NULL; + dai->cpu_of_node = i2s_node; + dai->platform_name = NULL; + dai->platform_of_node = i2s_node; + } + } + digital_gain_0db_limit = + !of_property_read_bool(pdev->dev.of_node, + "allo,24db_digital_gain"); + + glb_mclk = of_property_read_bool(pdev->dev.of_node, + "allo,glb_mclk"); + + allo_piano_2_1_codecs[0].of_node = + of_parse_phandle(pdev->dev.of_node, "audio-codec", 0); + if (!allo_piano_2_1_codecs[0].of_node) { + dev_err(&pdev->dev, + "Property 'audio-codec' missing or invalid\n"); + return -EINVAL; + } + + allo_piano_2_1_codecs[1].of_node = + of_parse_phandle(pdev->dev.of_node, "audio-codec", 1); + if (!allo_piano_2_1_codecs[1].of_node) { + dev_err(&pdev->dev, + "Property 'audio-codec' missing or invalid\n"); + return -EINVAL; + } + + mute_gpio[0] = devm_gpiod_get_optional(&pdev->dev, "mute1", + GPIOD_OUT_LOW); + if (IS_ERR(mute_gpio[0])) { + ret = PTR_ERR(mute_gpio[0]); + dev_err(&pdev->dev, + "failed to get mute1 gpio6: %d\n", ret); + return ret; + } + + mute_gpio[1] = devm_gpiod_get_optional(&pdev->dev, "mute2", + GPIOD_OUT_LOW); + if (IS_ERR(mute_gpio[1])) { + ret = PTR_ERR(mute_gpio[1]); + dev_err(&pdev->dev, + "failed to get mute2 gpio25: %d\n", ret); + return ret; + } + + if (mute_gpio[0] && mute_gpio[1]) + snd_allo_piano_dac.set_bias_level = + snd_allo_piano_set_bias_level; + + ret = snd_soc_register_card(&snd_allo_piano_dac); + if (ret < 0) { + dev_err(&pdev->dev, + "snd_soc_register_card() failed: %d\n", ret); + return ret; + } + + if ((mute_gpio[0]) && (mute_gpio[1])) + snd_allo_piano_gpio_mute(&snd_allo_piano_dac); + + return 0; + } + + return -EINVAL; +} + +static int snd_allo_piano_dac_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + kfree(&card->drvdata); + snd_allo_piano_gpio_mute(&snd_allo_piano_dac); + return snd_soc_unregister_card(&snd_allo_piano_dac); +} + +static const struct of_device_id snd_allo_piano_dac_of_match[] = { + { .compatible = "allo,piano-dac-plus", }, + { /* sentinel */ }, +}; + +MODULE_DEVICE_TABLE(of, snd_allo_piano_dac_of_match); + +static struct platform_driver snd_allo_piano_dac_driver = { + .driver = { + .name = "snd-allo-piano-dac-plus", + .owner = THIS_MODULE, + .of_match_table = snd_allo_piano_dac_of_match, + }, + .probe = snd_allo_piano_dac_probe, + .remove = snd_allo_piano_dac_remove, +}; + +module_platform_driver(snd_allo_piano_dac_driver); + +MODULE_AUTHOR("Baswaraj K "); +MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Piano DAC Plus"); +MODULE_LICENSE("GPL v2"); -- 2.39.2