1 From dad63ece33a339a45c992915eae9d7d8885e98c7 Mon Sep 17 00:00:00 2001
2 From: Daniel Matuschek <info@crazy-audio.com>
3 Date: Wed, 15 Jan 2014 21:42:08 +0100
4 Subject: [PATCH 44/54] ASoC: BCM:Add support for HiFiBerry Digi. Driver is
5 based on the patched WM8804 driver.
7 Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
9 sound/soc/bcm/Kconfig | 7 ++
10 sound/soc/bcm/Makefile | 2 +
11 sound/soc/bcm/hifiberry_digi.c | 153 +++++++++++++++++++++++++++++++++++++++++
12 3 files changed, 162 insertions(+)
13 create mode 100644 sound/soc/bcm/hifiberry_digi.c
15 diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
16 index 714841d..e563dbc 100644
17 --- a/sound/soc/bcm/Kconfig
18 +++ b/sound/soc/bcm/Kconfig
19 @@ -26,6 +26,13 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
21 Say Y or M if you want to add support for HifiBerry DAC.
23 +config SND_BCM2708_SOC_HIFIBERRY_DIGI
24 + tristate "Support for HifiBerry Digi"
25 + depends on SND_BCM2708_SOC_I2S
26 + select SND_SOC_WM8804
28 + Say Y or M if you want to add support for HifiBerry Digi S/PDIF output board.
30 config SND_BCM2708_SOC_RPI_DAC
31 tristate "Support for RPi-DAC"
32 depends on SND_BCM2708_SOC_I2S
33 diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
34 index ccc9809..826df7d 100644
35 --- a/sound/soc/bcm/Makefile
36 +++ b/sound/soc/bcm/Makefile
37 @@ -10,7 +10,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
39 # BCM2708 Machine Support
40 snd-soc-hifiberry-dac-objs := hifiberry_dac.o
41 +snd-soc-hifiberry-digi-objs := hifiberry_digi.o
42 snd-soc-rpi-dac-objs := rpi-dac.o
44 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
45 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
46 obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
47 diff --git a/sound/soc/bcm/hifiberry_digi.c b/sound/soc/bcm/hifiberry_digi.c
49 index 0000000..e4f769d
51 +++ b/sound/soc/bcm/hifiberry_digi.c
54 + * ASoC Driver for HifiBerry Digi
56 + * Author: Daniel Matuschek <info@crazy-audio.com>
57 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
60 + * This program is free software; you can redistribute it and/or
61 + * modify it under the terms of the GNU General Public License
62 + * version 2 as published by the Free Software Foundation.
64 + * This program is distributed in the hope that it will be useful, but
65 + * WITHOUT ANY WARRANTY; without even the implied warranty of
66 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
67 + * General Public License for more details.
70 +#include <linux/module.h>
71 +#include <linux/platform_device.h>
73 +#include <sound/core.h>
74 +#include <sound/pcm.h>
75 +#include <sound/pcm_params.h>
76 +#include <sound/soc.h>
77 +#include <sound/jack.h>
79 +#include "../codecs/wm8804.h"
81 +static int samplerate=44100;
83 +static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
85 + struct snd_soc_codec *codec = rtd->codec;
87 + /* enable TX output */
88 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
93 +static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
94 + struct snd_pcm_hw_params *params)
96 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
97 + struct snd_soc_dai *codec_dai = rtd->codec_dai;
98 + struct snd_soc_codec *codec = rtd->codec;
99 + struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
101 + int sysclk = 27000000; /* This is fixed on this board */
108 + samplerate = params_rate(params);
110 + switch (samplerate) {
115 + mclk_freq=samplerate*256;
116 + mclk_div=WM8804_MCLKDIV_256FS;
120 + mclk_freq=samplerate*128;
121 + mclk_div=WM8804_MCLKDIV_128FS;
124 + dev_err(substream->pcm->dev,
125 + "Failed to set WM8804 SYSCLK, unsupported samplerate\n");
128 + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
129 + snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
131 + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
132 + sysclk, SND_SOC_CLOCK_OUT);
134 + dev_err(substream->pcm->dev,
135 + "Failed to set WM8804 SYSCLK: %d\n", ret);
139 + /* Enable TX output */
140 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
143 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
145 + return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
148 +/* machine stream operations */
149 +static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
150 + .hw_params = snd_rpi_hifiberry_digi_hw_params,
153 +static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
155 + .name = "HifiBerry Digi",
156 + .stream_name = "HifiBerry Digi HiFi",
157 + .cpu_dai_name = "bcm2708-i2s.0",
158 + .codec_dai_name = "wm8804-spdif",
159 + .platform_name = "bcm2708-i2s.0",
160 + .codec_name = "wm8804.1-003b",
161 + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
162 + SND_SOC_DAIFMT_CBM_CFM,
163 + .ops = &snd_rpi_hifiberry_digi_ops,
164 + .init = snd_rpi_hifiberry_digi_init,
168 +/* audio machine driver */
169 +static struct snd_soc_card snd_rpi_hifiberry_digi = {
170 + .name = "snd_rpi_hifiberry_digi",
171 + .dai_link = snd_rpi_hifiberry_digi_dai,
172 + .num_links = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
175 +static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
179 + snd_rpi_hifiberry_digi.dev = &pdev->dev;
180 + ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
182 + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
187 +static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
189 + return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
192 +static struct platform_driver snd_rpi_hifiberry_digi_driver = {
194 + .name = "snd-hifiberry-digi",
195 + .owner = THIS_MODULE,
197 + .probe = snd_rpi_hifiberry_digi_probe,
198 + .remove = snd_rpi_hifiberry_digi_remove,
201 +module_platform_driver(snd_rpi_hifiberry_digi_driver);
203 +MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
204 +MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
205 +MODULE_LICENSE("GPL v2");