From 7da0da344225ec00f3070f9b4f6cb9dda06093ab Mon Sep 17 00:00:00 2001 From: "chipdip.lab" <43340836+chipdipru@users.noreply.github.com> Date: Mon, 26 Jul 2021 14:45:59 +0300 Subject: [PATCH] ASoC: bcm: Add chipdip-dac driver Driver chipdip-dac.c added into sound/soc/bcm/, files sound/soc/bcm/Kconfig and sound/soc/bcm/Makefile updated. Signed-off-by: Evgenij Sapunov --- sound/soc/bcm/Kconfig | 6 + sound/soc/bcm/Makefile | 3 +- sound/soc/bcm/chipdip-dac.c | 275 ++++++++++++++++++++++++++++++++++++ 3 files changed, 283 insertions(+), 1 deletion(-) create mode 100644 sound/soc/bcm/chipdip-dac.c --- a/sound/soc/bcm/Kconfig +++ b/sound/soc/bcm/Kconfig @@ -27,6 +27,12 @@ config SND_BCM63XX_I2S_WHISTLER If you don't know what to do here, say N +config SND_BCM2708_SOC_CHIPDIP_DAC + tristate "Support for the ChipDip DAC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S + help + Say Y or M if you want to add support for the ChipDip DAC soundcard + config SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD tristate "Support for Google voiceHAT soundcard" depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S --- a/sound/soc/bcm/Makefile +++ b/sound/soc/bcm/Makefile @@ -47,6 +47,7 @@ snd-soc-fe-pi-audio-objs := fe-pi-audio. snd-soc-rpi-simple-soundcard-objs := rpi-simple-soundcard.o snd-soc-rpi-wm8804-soundcard-objs := rpi-wm8804-soundcard.o snd-soc-pifi-40-objs := pifi-40.o +snd-soc-chipdip-dac-objs := chipdip-dac.o obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-codec.o obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o @@ -78,4 +79,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO obj-$(CONFIG_SND_RPI_SIMPLE_SOUNDCARD) += snd-soc-rpi-simple-soundcard.o obj-$(CONFIG_SND_RPI_WM8804_SOUNDCARD) += snd-soc-rpi-wm8804-soundcard.o obj-$(CONFIG_SND_BCM2708_SOC_PIFI_40) += snd-soc-pifi-40.o - +obj-$(CONFIG_SND_BCM2708_SOC_CHIPDIP_DAC) += snd-soc-chipdip-dac.o --- /dev/null +++ b/sound/soc/bcm/chipdip-dac.c @@ -0,0 +1,275 @@ +/* + * ASoC Driver for ChipDip DAC + * + * Author: Evgenij Sapunov + * Copyright 2021 + * based on code by Milan Neskovic + * based on code by Jaikumar + * + * Thanks to Phil Elwell (pelwell) for help. + * + * 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 + +#define SR_BIT_0 0 //sample rate bits +#define SR_BIT_1 1 +#define SR_BIT_2 2 +#define BD_BIT_0 3 //bit depth bits +#define BD_BIT_1 4 + +#define SAMPLE_RATE_MASK_44_1 0 +#define SAMPLE_RATE_MASK_48 (1 << SR_BIT_0) +#define SAMPLE_RATE_MASK_88_2 ((1 << SR_BIT_2) | (1 << SR_BIT_1)) +#define SAMPLE_RATE_MASK_96 (1 << SR_BIT_1) +#define SAMPLE_RATE_MASK_176_4 ((1 << SR_BIT_2) | (1 << SR_BIT_1) | (1 << SR_BIT_0)) +#define SAMPLE_RATE_MASK_192 ((1 << SR_BIT_1) | (1 << SR_BIT_0)) +#define SAMPLE_RATE_MASK ((1 << SR_BIT_2) | (1 << SR_BIT_1) | (1 << SR_BIT_0)) + +#define BIT_DEPTH_MASK_16 0 +#define BIT_DEPTH_MASK_24 (1 << BD_BIT_0) +#define BIT_DEPTH_MASK_32 (1 << BD_BIT_1) +#define BIT_DEPTH_MASK ((1 << BD_BIT_1) | (1 << BD_BIT_0)) + +#define MUTE_ACTIVE 0 +#define MUTE_NOT_ACTIVE 1 + +#define HW_PARAMS_GPIO_COUNT 5 + +static struct gpio_desc *mute_gpio; +static struct gpio_desc *sdwn_gpio; +static struct gpio_desc *hw_params_gpios[HW_PARAMS_GPIO_COUNT]; +static int current_width; +static int current_rate; + +static void snd_rpi_chipdip_dac_gpio_array_set(int value); +static void snd_rpi_chipdip_dac_gpio_set(struct gpio_desc *gpio_item, int value); + +static void snd_rpi_chipdip_dac_gpio_array_set(int value) +{ + int i = 0; + + for (i = 0; i < HW_PARAMS_GPIO_COUNT; i++) + snd_rpi_chipdip_dac_gpio_set(hw_params_gpios[i], ((value >> i) & 1)); +} + +static void snd_rpi_chipdip_dac_gpio_set(struct gpio_desc *gpio_item, int value) +{ + if (gpio_item) + gpiod_set_value_cansleep(gpio_item, value); +} + +static int snd_rpi_chipdip_dac_init(struct snd_soc_pcm_runtime *rtd) +{ + return 0; +} + +static int snd_rpi_chipdip_dac_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + int ret = 0; + int gpio_change_pending = 0; + int sample_rate_state = 0; + int bit_depth_state = 0; + int param_value = params_width(params); + struct snd_soc_pcm_runtime *rtd = substream->private_data; + + ret = snd_soc_dai_set_bclk_ratio(asoc_rtd_to_cpu(rtd, 0), 2 * 32); + + if (current_width != param_value) { + current_width = param_value; + gpio_change_pending = 1; + + switch (param_value) { + case 16: + bit_depth_state = BIT_DEPTH_MASK_16; + break; + case 24: + bit_depth_state = BIT_DEPTH_MASK_24; + break; + case 32: + bit_depth_state = BIT_DEPTH_MASK_32; + break; + default: + return -EINVAL; + } + } + + param_value = params_rate(params); + if (current_rate != param_value) { + current_rate = param_value; + gpio_change_pending = 1; + + switch (param_value) { + case 44100: + sample_rate_state = SAMPLE_RATE_MASK_44_1; + break; + case 48000: + sample_rate_state = SAMPLE_RATE_MASK_48; + break; + case 88200: + sample_rate_state = SAMPLE_RATE_MASK_88_2; + break; + case 96000: + sample_rate_state = SAMPLE_RATE_MASK_96; + break; + case 176400: + sample_rate_state = SAMPLE_RATE_MASK_176_4; + break; + case 192000: + sample_rate_state = SAMPLE_RATE_MASK_192; + break; + default: + return -EINVAL; + } + } + + if (gpio_change_pending) { + snd_rpi_chipdip_dac_gpio_set(mute_gpio, MUTE_ACTIVE); + snd_rpi_chipdip_dac_gpio_array_set(bit_depth_state | sample_rate_state); + msleep(300); + snd_rpi_chipdip_dac_gpio_set(mute_gpio, MUTE_NOT_ACTIVE); + } + + return ret; +} + +static int snd_rpi_chipdip_dac_startup(struct snd_pcm_substream *substream) +{ + return 0; +} + +static void snd_rpi_chipdip_dac_shutdown(struct snd_pcm_substream *substream) +{ + +} + +/* machine stream operations */ +static struct snd_soc_ops snd_rpi_chipdip_dac_ops = { + .hw_params = snd_rpi_chipdip_dac_hw_params, + .startup = snd_rpi_chipdip_dac_startup, + .shutdown = snd_rpi_chipdip_dac_shutdown, +}; + +SND_SOC_DAILINK_DEFS(hifi, + DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), + DAILINK_COMP_ARRAY(COMP_CODEC("spdif-transmitter", "dit-hifi")), + DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); + +static struct snd_soc_dai_link snd_rpi_chipdip_dac_dai[] = { +{ + .name = "ChipDip DAC", + .stream_name = "ChipDip DAC HiFi", + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM, + .ops = &snd_rpi_chipdip_dac_ops, + .init = snd_rpi_chipdip_dac_init, + SND_SOC_DAILINK_REG(hifi), +}, +}; + +/* audio machine driver */ +static struct snd_soc_card snd_rpi_chipdip_dac = { + .name = "ChipDipDAC", + .driver_name = "ChipdipDac", + .owner = THIS_MODULE, + .dai_link = snd_rpi_chipdip_dac_dai, + .num_links = ARRAY_SIZE(snd_rpi_chipdip_dac_dai), +}; + +static int snd_rpi_chipdip_dac_probe(struct platform_device *pdev) +{ + int ret = 0; + int i = 0; + + snd_rpi_chipdip_dac.dev = &pdev->dev; + + if (pdev->dev.of_node) { + struct device_node *i2s_node; + struct snd_soc_dai_link *dai = &snd_rpi_chipdip_dac_dai[0]; + i2s_node = of_parse_phandle(pdev->dev.of_node, + "i2s-controller", 0); + + if (i2s_node) { + dai->cpus->dai_name = NULL; + dai->cpus->of_node = i2s_node; + dai->platforms->name = NULL; + dai->platforms->of_node = i2s_node; + } + } + + hw_params_gpios[SR_BIT_0] = devm_gpiod_get_optional(&pdev->dev, "sr0", GPIOD_OUT_LOW); + hw_params_gpios[SR_BIT_1] = devm_gpiod_get_optional(&pdev->dev, "sr1", GPIOD_OUT_LOW); + hw_params_gpios[SR_BIT_2] = devm_gpiod_get_optional(&pdev->dev, "sr2", GPIOD_OUT_LOW); + hw_params_gpios[BD_BIT_0] = devm_gpiod_get_optional(&pdev->dev, "res0", GPIOD_OUT_LOW); + hw_params_gpios[BD_BIT_1] = devm_gpiod_get_optional(&pdev->dev, "res1", GPIOD_OUT_LOW); + mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", GPIOD_OUT_LOW); + sdwn_gpio = devm_gpiod_get_optional(&pdev->dev, "sdwn", GPIOD_OUT_HIGH); + + for (i = 0; i < HW_PARAMS_GPIO_COUNT; i++) { + if (IS_ERR(hw_params_gpios[i])) { + ret = PTR_ERR(hw_params_gpios[i]); + dev_err(&pdev->dev, "failed to get hw_params gpio: %d\n", ret); + return ret; + } + } + + if (IS_ERR(mute_gpio)) { + ret = PTR_ERR(mute_gpio); + dev_err(&pdev->dev, "failed to get mute gpio: %d\n", ret); + return ret; + } + + if (IS_ERR(sdwn_gpio)) { + ret = PTR_ERR(sdwn_gpio); + dev_err(&pdev->dev, "failed to get sdwn gpio: %d\n", ret); + return ret; + } + + snd_rpi_chipdip_dac_gpio_set(sdwn_gpio, 1); + + ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_chipdip_dac); + if (ret && ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "snd_soc_register_card() failed: %d\n", ret); + + return ret; +} + +static const struct of_device_id snd_rpi_chipdip_dac_of_match[] = { + { .compatible = "chipdip,chipdip-dac", }, + {}, +}; +MODULE_DEVICE_TABLE(of, snd_rpi_chipdip_dac_of_match); + +static struct platform_driver snd_rpi_chipdip_dac_driver = { + .driver = { + .name = "snd-rpi-chipdip-dac", + .owner = THIS_MODULE, + .of_match_table = snd_rpi_chipdip_dac_of_match, + }, + .probe = snd_rpi_chipdip_dac_probe, +}; + +module_platform_driver(snd_rpi_chipdip_dac_driver); + +MODULE_AUTHOR("Evgenij Sapunov "); +MODULE_DESCRIPTION("ASoC Driver for ChipDip DAC"); +MODULE_LICENSE("GPL v2");