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Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0456-ASoC-bcm-Add-chipdip-dac-driver.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.15/950-0456-ASoC-bcm-Add-chipdip-dac-driver.patch325
1 files changed, 325 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0456-ASoC-bcm-Add-chipdip-dac-driver.patch b/target/linux/bcm27xx/patches-5.15/950-0456-ASoC-bcm-Add-chipdip-dac-driver.patch
new file mode 100644
index 0000000000..de69367552
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0456-ASoC-bcm-Add-chipdip-dac-driver.patch
@@ -0,0 +1,325 @@
+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 <evgenij.sapunov@chipdip.ru>
+---
+ 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 <info@justboom.co>
++ * based on code by Jaikumar <jaikumar@cem-solutions.net>
++ *
++ * 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 <linux/module.h>
++#include <linux/gpio/consumer.h>
++#include <linux/platform_device.h>
++#include <linux/delay.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++#include <sound/jack.h>
++
++#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 <evgenij.sapunov@chipdip.ru>");
++MODULE_DESCRIPTION("ASoC Driver for ChipDip DAC");
++MODULE_LICENSE("GPL v2");