198 lines
5.8 KiB
Diff
198 lines
5.8 KiB
Diff
From bccfebf3bc4457faddaa65e3492ec9f07cb5750b Mon Sep 17 00:00:00 2001
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From: Daniel Matuschek <info@crazy-audio.com>
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Date: Wed, 15 Jan 2014 21:42:08 +0100
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Subject: [PATCH 038/114] ASoC: BCM:Add support for HiFiBerry Digi. Driver is
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based on the patched WM8804 driver.
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Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
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---
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sound/soc/bcm/Kconfig | 7 ++
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sound/soc/bcm/Makefile | 2 +
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sound/soc/bcm/hifiberry_digi.c | 153 +++++++++++++++++++++++++++++++++++++++++
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3 files changed, 162 insertions(+)
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create mode 100644 sound/soc/bcm/hifiberry_digi.c
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--- a/sound/soc/bcm/Kconfig
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+++ b/sound/soc/bcm/Kconfig
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@@ -26,6 +26,13 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
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help
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Say Y or M if you want to add support for HifiBerry DAC.
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+config SND_BCM2708_SOC_HIFIBERRY_DIGI
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+ tristate "Support for HifiBerry Digi"
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+ depends on SND_BCM2708_SOC_I2S
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+ select SND_SOC_WM8804
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+ help
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+ Say Y or M if you want to add support for HifiBerry Digi S/PDIF output board.
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+
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config SND_BCM2708_SOC_RPI_DAC
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tristate "Support for RPi-DAC"
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depends on SND_BCM2708_SOC_I2S
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--- a/sound/soc/bcm/Makefile
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+++ b/sound/soc/bcm/Makefile
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@@ -10,7 +10,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd
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# BCM2708 Machine Support
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snd-soc-hifiberry-dac-objs := hifiberry_dac.o
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+snd-soc-hifiberry-digi-objs := hifiberry_digi.o
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snd-soc-rpi-dac-objs := rpi-dac.o
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obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
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+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
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obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
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--- /dev/null
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+++ b/sound/soc/bcm/hifiberry_digi.c
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@@ -0,0 +1,153 @@
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+/*
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+ * ASoC Driver for HifiBerry Digi
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+ *
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+ * Author: Daniel Matuschek <info@crazy-audio.com>
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+ * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
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+ * Copyright 2013
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/platform_device.h>
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+
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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+#include <sound/soc.h>
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+#include <sound/jack.h>
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+
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+#include "../codecs/wm8804.h"
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+
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+static int samplerate=44100;
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+
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+static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
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+{
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+ struct snd_soc_codec *codec = rtd->codec;
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+
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+ /* enable TX output */
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+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
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+
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+ return 0;
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+}
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+
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+static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
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+ struct snd_pcm_hw_params *params)
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+{
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+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
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+ struct snd_soc_codec *codec = rtd->codec;
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+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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+
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+ int sysclk = 27000000; /* This is fixed on this board */
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+
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+ long mclk_freq=0;
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+ int mclk_div=1;
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+
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+ int ret;
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+
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+ samplerate = params_rate(params);
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+
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+ switch (samplerate) {
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+ case 44100:
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+ case 48000:
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+ case 88200:
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+ case 96000:
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+ mclk_freq=samplerate*256;
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+ mclk_div=WM8804_MCLKDIV_256FS;
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+ break;
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+ case 176400:
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+ case 192000:
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+ mclk_freq=samplerate*128;
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+ mclk_div=WM8804_MCLKDIV_128FS;
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+ break;
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+ default:
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+ dev_err(substream->pcm->dev,
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+ "Failed to set WM8804 SYSCLK, unsupported samplerate\n");
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+ }
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+
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+ snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
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+ snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
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+
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+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
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+ sysclk, SND_SOC_CLOCK_OUT);
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+ if (ret < 0) {
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+ dev_err(substream->pcm->dev,
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+ "Failed to set WM8804 SYSCLK: %d\n", ret);
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+ return ret;
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+ }
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+
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+ /* Enable TX output */
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+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
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+
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+ /* Power on */
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+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
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+
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+ return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
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+}
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+
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+/* machine stream operations */
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+static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
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+ .hw_params = snd_rpi_hifiberry_digi_hw_params,
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+};
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+
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+static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
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+{
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+ .name = "HifiBerry Digi",
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+ .stream_name = "HifiBerry Digi HiFi",
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+ .cpu_dai_name = "bcm2708-i2s.0",
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+ .codec_dai_name = "wm8804-spdif",
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+ .platform_name = "bcm2708-i2s.0",
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+ .codec_name = "wm8804.1-003b",
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+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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+ SND_SOC_DAIFMT_CBM_CFM,
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+ .ops = &snd_rpi_hifiberry_digi_ops,
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+ .init = snd_rpi_hifiberry_digi_init,
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+},
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+};
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+
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+/* audio machine driver */
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+static struct snd_soc_card snd_rpi_hifiberry_digi = {
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+ .name = "snd_rpi_hifiberry_digi",
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+ .dai_link = snd_rpi_hifiberry_digi_dai,
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+ .num_links = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
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+};
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+
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+static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
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+{
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+ int ret = 0;
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+
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+ snd_rpi_hifiberry_digi.dev = &pdev->dev;
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+ ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
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+ if (ret)
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+ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
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+
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+ return ret;
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+}
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+
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+static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
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+{
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+ return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
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+}
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+
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+static struct platform_driver snd_rpi_hifiberry_digi_driver = {
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+ .driver = {
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+ .name = "snd-hifiberry-digi",
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+ .owner = THIS_MODULE,
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+ },
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+ .probe = snd_rpi_hifiberry_digi_probe,
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+ .remove = snd_rpi_hifiberry_digi_remove,
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+};
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+
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+module_platform_driver(snd_rpi_hifiberry_digi_driver);
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+
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+MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
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+MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
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+MODULE_LICENSE("GPL v2");
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