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ASoC: BCM:Add support for HiFiBerry Digi. Driver is based on the patched WM8804 driver.

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Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
This commit is contained in:
Daniel Matuschek
2014-01-15 21:42:08 +01:00
committed by popcornmix
parent 8bab4c7e56
commit aba07adc7c
3 changed files with 162 additions and 0 deletions
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7
sound/soc/bcm/Kconfig
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@@ -26,6 +26,13 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
help
Say Y or M if you want to add support for HifiBerry DAC.
config SND_BCM2708_SOC_HIFIBERRY_DIGI
tristate "Support for HifiBerry Digi"
depends on SND_BCM2708_SOC_I2S
select SND_SOC_WM8804
help
Say Y or M if you want to add support for HifiBerry Digi S/PDIF output board.
config SND_BCM2708_SOC_RPI_DAC
tristate "Support for RPi-DAC"
depends on SND_BCM2708_SOC_I2S

2
sound/soc/bcm/Makefile
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@@ -10,7 +10,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
# BCM2708 Machine Support
snd-soc-hifiberry-dac-objs := hifiberry_dac.o
snd-soc-hifiberry-digi-objs := hifiberry_digi.o
snd-soc-rpi-dac-objs := rpi-dac.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o

153
sound/soc/bcm/hifiberry_digi.c Normal file
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@@ -0,0 +1,153 @@
/*
* ASoC Driver for HifiBerry Digi
*
* Author: Daniel Matuschek <info@crazy-audio.com>
* based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
* Copyright 2013
*
* 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/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include "../codecs/wm8804.h"
static int samplerate=44100;
static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
/* enable TX output */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
return 0;
}
static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int sysclk = 27000000; /* This is fixed on this board */
long mclk_freq=0;
int mclk_div=1;
int ret;
samplerate = params_rate(params);
switch (samplerate) {
case 44100:
case 48000:
case 88200:
case 96000:
mclk_freq=samplerate*256;
mclk_div=WM8804_MCLKDIV_256FS;
break;
case 176400:
case 192000:
mclk_freq=samplerate*128;
mclk_div=WM8804_MCLKDIV_128FS;
break;
default:
dev_err(codec->dev,
"Failed to set WM8804 SYSCLK, unsupported samplerate\n");
}
snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
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);
return ret;
}
/* Enable TX output */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
/* Power on */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
}
/* machine stream operations */
static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
.hw_params = snd_rpi_hifiberry_digi_hw_params,
};
static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
{
.name = "HifiBerry Digi",
.stream_name = "HifiBerry Digi HiFi",
.cpu_dai_name = "bcm2708-i2s.0",
.codec_dai_name = "wm8804-spdif",
.platform_name = "bcm2708-i2s.0",
.codec_name = "wm8804.1-003b",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM,
.ops = &snd_rpi_hifiberry_digi_ops,
.init = snd_rpi_hifiberry_digi_init,
},
};
/* audio machine driver */
static struct snd_soc_card snd_rpi_hifiberry_digi = {
.name = "snd_rpi_hifiberry_digi",
.dai_link = snd_rpi_hifiberry_digi_dai,
.num_links = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
};
static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
{
int ret = 0;
snd_rpi_hifiberry_digi.dev = &pdev->dev;
ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
if (ret)
dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
return ret;
}
static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
{
return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
}
static struct platform_driver snd_rpi_hifiberry_digi_driver = {
.driver = {
.name = "snd-hifiberry-digi",
.owner = THIS_MODULE,
},
.probe = snd_rpi_hifiberry_digi_probe,
.remove = snd_rpi_hifiberry_digi_remove,
};
module_platform_driver(snd_rpi_hifiberry_digi_driver);
MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
MODULE_LICENSE("GPL v2");