+++ /dev/null
-From e17c3e2ccb04657ca00984477854a6a700fef01d 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");
projects / openwrt / staging / chunkeey.git / blobdiff