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From 4951e0d22b58566678a16d53bf06851e1b63eeff Mon Sep 17 00:00:00 2001
From: David Knell <david.knell@gmail.com>
Date: Mon, 8 Feb 2021 03:35:15 +0000
Subject: [PATCH] Added PiFi-Mini to rpi-simple-soundcard.c
Signed-off-by: David Knell <david.knell@gmail.com>
---
sound/soc/bcm/rpi-simple-soundcard.c | 94 +++++++++++++++++++++++++---
1 file changed, 87 insertions(+), 7 deletions(-)
--- a/sound/soc/bcm/rpi-simple-soundcard.c
+++ b/sound/soc/bcm/rpi-simple-soundcard.c
@@ -32,6 +32,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/gpio/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -45,6 +46,13 @@ struct snd_rpi_simple_drvdata {
unsigned int fixed_bclk_ratio;
};
+static struct snd_soc_card snd_rpi_simple = {
+ .driver_name = "RPi-simple",
+ .owner = THIS_MODULE,
+ .dai_link = NULL,
+ .num_links = 1, /* Only a single DAI supported at the moment */
+};
+
static int snd_rpi_simple_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_rpi_simple_drvdata *drvdata =
@@ -58,6 +66,60 @@ static int snd_rpi_simple_init(struct sn
return 0;
}
+static int pifi_mini_210_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_component *dac;
+ struct gpio_desc *pdn_gpio, *rst_gpio;
+ struct snd_soc_dai *codec_dai;
+ int ret;
+
+ snd_rpi_simple_init(rtd);
+ codec_dai = asoc_rtd_to_codec(rtd, 0);
+
+ dac = codec_dai[0].component;
+
+ pdn_gpio = devm_gpiod_get_optional(snd_rpi_simple.dev, "pdn",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(pdn_gpio)) {
+ ret = PTR_ERR(pdn_gpio);
+ dev_err(snd_rpi_simple.dev, "failed to get pdn gpio: %d\n", ret);
+ return ret;
+ }
+
+ rst_gpio = devm_gpiod_get_optional(snd_rpi_simple.dev, "rst",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(rst_gpio)) {
+ ret = PTR_ERR(rst_gpio);
+ dev_err(snd_rpi_simple.dev, "failed to get rst gpio: %d\n", ret);
+ return ret;
+ }
+
+ // Set up cards - pulse power down and reset first, then
+ // set up according to datasheet
+ gpiod_set_value_cansleep(pdn_gpio, 1);
+ gpiod_set_value_cansleep(rst_gpio, 1);
+ usleep_range(1000, 10000);
+ gpiod_set_value_cansleep(pdn_gpio, 0);
+ usleep_range(20000, 30000);
+ gpiod_set_value_cansleep(rst_gpio, 0);
+ usleep_range(20000, 30000);
+
+ // Oscillator trim
+ snd_soc_component_write(dac, 0x1b, 0);
+ usleep_range(60000, 80000);
+
+ // MCLK at 64fs, sample rate 44.1 or 48kHz
+ snd_soc_component_write(dac, 0x00, 0x60);
+
+ // Set up for BTL - AD/BD mode - AD is 0x00107772, BD is 0x00987772
+ snd_soc_component_write(dac, 0x20, 0x00107772);
+
+ // End mute
+ snd_soc_component_write(dac, 0x05, 0x00);
+
+ return 0;
+}
+
static int snd_rpi_simple_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
@@ -255,6 +317,29 @@ static struct snd_rpi_simple_drvdata drv
.fixed_bclk_ratio = 64,
};
+SND_SOC_DAILINK_DEFS(pifi_mini_210,
+ DAILINK_COMP_ARRAY(COMP_EMPTY()),
+ DAILINK_COMP_ARRAY(COMP_CODEC("tas571x.1-001a", "tas571x-hifi")),
+ DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link snd_pifi_mini_210_dai[] = {
+ {
+ .name = "PiFi Mini 210",
+ .stream_name = "PiFi Mini 210 HiFi",
+ .init = pifi_mini_210_init,
+ .dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ SND_SOC_DAILINK_REG(pifi_mini_210),
+ },
+};
+
+static struct snd_rpi_simple_drvdata drvdata_pifi_mini_210 = {
+ .card_name = "snd_pifi_mini_210",
+ .dai = snd_pifi_mini_210_dai,
+ .fixed_bclk_ratio = 64,
+};
+
static const struct of_device_id snd_rpi_simple_of_match[] = {
{ .compatible = "adi,adau1977-adc",
.data = (void *) &drvdata_adau1977 },
@@ -269,16 +354,11 @@ static const struct of_device_id snd_rpi
{ .compatible = "rpi,rpi-dac", &drvdata_rpi_dac},
{ .compatible = "merus,merus-amp",
.data = (void *) &drvdata_merus_amp },
+ { .compatible = "pifi,pifi-mini-210",
+ .data = (void *) &drvdata_pifi_mini_210 },
{},
};
-static struct snd_soc_card snd_rpi_simple = {
- .driver_name = "RPi-simple",
- .owner = THIS_MODULE,
- .dai_link = NULL,
- .num_links = 1, /* Only a single DAI supported at the moment */
-};
-
static int snd_rpi_simple_probe(struct platform_device *pdev)
{
int ret = 0;
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