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From e528c5d3f8cffca37abf9c69f7178f0221974225 Mon Sep 17 00:00:00 2001
From: "Daniel Matuschek (HiFiBerry)" <daniel@hifiberry.com>
Date: Tue, 26 Jul 2016 19:16:25 +0200
Subject: [PATCH] Added HiFiBerry Digi+ Pro driver
Signed-off-by: Daniel Matuschek <daniel@hifiberry.com>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 8 +++-
.../dts/overlays/hifiberry-digi-pro-overlay.dts | 41 +++++++++++++++++
sound/soc/bcm/hifiberry_digi.c | 51 ++++++++++++++++++++++
4 files changed, 100 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/boot/dts/overlays/hifiberry-digi-pro-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -31,6 +31,7 @@ dtbo-$(RPI_DT_OVERLAYS) += hifiberry-amp
dtbo-$(RPI_DT_OVERLAYS) += hifiberry-dac.dtbo
dtbo-$(RPI_DT_OVERLAYS) += hifiberry-dacplus.dtbo
dtbo-$(RPI_DT_OVERLAYS) += hifiberry-digi.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += hifiberry-digi-pro.dtbo
dtbo-$(RPI_DT_OVERLAYS) += hy28a.dtbo
dtbo-$(RPI_DT_OVERLAYS) += hy28b.dtbo
dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -377,11 +377,17 @@ Params: 24db_digital_gain Allow ga
Name: hifiberry-digi
-Info: Configures the HifiBerry Digi audio card
+Info: Configures the HifiBerry Digi and Digi+ audio card
Load: dtoverlay=hifiberry-digi
Params: <None>
+Name: hifiberry-digi-pro
+Info: Configures the HifiBerry Digi+ Pro audio card
+Load: dtoverlay=hifiberry-digi-pro
+Params: <None>
+
+
Name: hy28a
Info: HY28A - 2.8" TFT LCD Display Module by HAOYU Electronics
Default values match Texy's display shield
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/hifiberry-digi-pro-overlay.dts
@@ -0,0 +1,41 @@
+// Definitions for HiFiBerry Digi Pro
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&i2s>;
+ __overlay__ {
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target = <&i2c1>;
+ __overlay__ {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ wm8804@3b {
+ #sound-dai-cells = <0>;
+ compatible = "wlf,wm8804";
+ reg = <0x3b>;
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&sound>;
+ __overlay__ {
+ compatible = "hifiberry,hifiberry-digi";
+ i2s-controller = <&i2s>;
+ status = "okay";
+ clock44-gpio = <&gpio 5 0>;
+ clock48-gpio = <&gpio 6 0>;
+ };
+ };
+};
--- a/sound/soc/bcm/hifiberry_digi.c
+++ b/sound/soc/bcm/hifiberry_digi.c
@@ -23,6 +23,7 @@
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
+#include <linux/gpio/consumer.h>
#include "../codecs/wm8804.h"
@@ -30,9 +31,34 @@ static short int auto_shutdown_output =
module_param(auto_shutdown_output, short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped");
+#define CLK_44EN_RATE 22579200UL
+#define CLK_48EN_RATE 24576000UL
+
+static bool snd_rpi_hifiberry_is_digipro;
+static struct gpio_desc *snd_rpi_hifiberry_clk44gpio;
+static struct gpio_desc *snd_rpi_hifiberry_clk48gpio;
static int samplerate=44100;
+static uint32_t snd_rpi_hifiberry_digi_enable_clock(int sample_rate)
+{
+ switch (sample_rate) {
+ case 11025:
+ case 22050:
+ case 44100:
+ case 88200:
+ case 176400:
+ gpiod_set_value_cansleep(snd_rpi_hifiberry_clk44gpio, 1);
+ gpiod_set_value_cansleep(snd_rpi_hifiberry_clk48gpio, 0);
+ return CLK_44EN_RATE;
+ default:
+ gpiod_set_value_cansleep(snd_rpi_hifiberry_clk48gpio, 1);
+ gpiod_set_value_cansleep(snd_rpi_hifiberry_clk44gpio, 0);
+ return CLK_48EN_RATE;
+ }
+}
+
+
static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
@@ -40,6 +66,14 @@ static int snd_rpi_hifiberry_digi_init(s
/* enable TX output */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
+ /* Initialize Digi+ Pro hardware */
+ if (snd_rpi_hifiberry_is_digipro) {
+ struct snd_soc_dai_link *dai = rtd->dai_link;
+
+ dai->name = "HiFiBerry Digi+ Pro";
+ dai->stream_name = "HiFiBerry Digi+ Pro HiFi";
+ }
+
return 0;
}
@@ -87,6 +121,9 @@ static int snd_rpi_hifiberry_digi_hw_par
mclk_freq=samplerate*128;
mclk_div=WM8804_MCLKDIV_128FS;
}
+
+ if (snd_rpi_hifiberry_is_digipro)
+ sysclk = snd_rpi_hifiberry_digi_enable_clock(samplerate);
switch (samplerate) {
case 32000:
@@ -121,6 +158,7 @@ static int snd_rpi_hifiberry_digi_hw_par
ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
sysclk, SND_SOC_CLOCK_OUT);
+
if (ret < 0) {
dev_err(codec->dev,
"Failed to set WM8804 SYSCLK: %d\n", ret);
@@ -187,6 +225,19 @@ static int snd_rpi_hifiberry_digi_probe(
dai->platform_name = NULL;
dai->platform_of_node = i2s_node;
}
+
+ snd_rpi_hifiberry_is_digipro = 1;
+
+ snd_rpi_hifiberry_clk44gpio =
+ devm_gpiod_get(&pdev->dev, "clock44", GPIOD_OUT_LOW);
+ if (IS_ERR(snd_rpi_hifiberry_clk44gpio))
+ snd_rpi_hifiberry_is_digipro = 0;
+
+ snd_rpi_hifiberry_clk48gpio =
+ devm_gpiod_get(&pdev->dev, "clock48", GPIOD_OUT_LOW);
+ if (IS_ERR(snd_rpi_hifiberry_clk48gpio))
+ snd_rpi_hifiberry_is_digipro = 0;
+
}
ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
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