1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
From 77afe84c37210adb241e9b48f1a415f49f183a68 Mon Sep 17 00:00:00 2001
From: Florian Meier <florian.meier@koalo.de>
Date: Fri, 22 Nov 2013 19:19:08 +0100
Subject: [PATCH 033/114] ASoC: Add support for HifiBerry DAC
This adds a machine driver for the HifiBerry DAC.
It is a sound card that can
be stacked onto the Raspberry Pi.
Signed-off-by: Florian Meier <florian.meier@koalo.de>
---
sound/soc/bcm/Kconfig | 7 +++
sound/soc/bcm/Makefile | 5 +++
sound/soc/bcm/hifiberry_dac.c | 100 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 112 insertions(+)
create mode 100644 sound/soc/bcm/hifiberry_dac.c
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -18,3 +18,10 @@ config SND_BCM2708_SOC_I2S
Say Y or M if you want to add support for codecs attached to
the BCM2708 I2S interface. You will also need
to select the audio interfaces to support below.
+
+config SND_BCM2708_SOC_HIFIBERRY_DAC
+ tristate "Support for HifiBerry DAC"
+ depends on SND_BCM2708_SOC_I2S
+ select SND_SOC_PCM5102A
+ help
+ Say Y or M if you want to add support for HifiBerry DAC.
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -7,3 +7,8 @@ obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd
snd-soc-bcm2708-i2s-objs := bcm2708-i2s.o
obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
+
+# BCM2708 Machine Support
+snd-soc-hifiberry-dac-objs := hifiberry_dac.o
+
+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
--- /dev/null
+++ b/sound/soc/bcm/hifiberry_dac.c
@@ -0,0 +1,100 @@
+/*
+ * ASoC Driver for HifiBerry DAC
+ *
+ * Author: 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>
+
+static int snd_rpi_hifiberry_dac_init(struct snd_soc_pcm_runtime *rtd)
+{
+ return 0;
+}
+
+static int snd_rpi_hifiberry_dac_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 *cpu_dai = rtd->cpu_dai;
+
+ unsigned int sample_bits =
+ snd_pcm_format_physical_width(params_format(params));
+
+ return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_hifiberry_dac_ops = {
+ .hw_params = snd_rpi_hifiberry_dac_hw_params,
+};
+
+static struct snd_soc_dai_link snd_rpi_hifiberry_dac_dai[] = {
+{
+ .name = "HifiBerry DAC",
+ .stream_name = "HifiBerry DAC HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "pcm5102a-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "pcm5102a-codec",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_rpi_hifiberry_dac_ops,
+ .init = snd_rpi_hifiberry_dac_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_hifiberry_dac = {
+ .name = "snd_rpi_hifiberry_dac",
+ .dai_link = snd_rpi_hifiberry_dac_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_hifiberry_dac_dai),
+};
+
+static int snd_rpi_hifiberry_dac_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_rpi_hifiberry_dac.dev = &pdev->dev;
+ ret = snd_soc_register_card(&snd_rpi_hifiberry_dac);
+ if (ret)
+ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
+
+ return ret;
+}
+
+static int snd_rpi_hifiberry_dac_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&snd_rpi_hifiberry_dac);
+}
+
+static struct platform_driver snd_rpi_hifiberry_dac_driver = {
+ .driver = {
+ .name = "snd-hifiberry-dac",
+ .owner = THIS_MODULE,
+ },
+ .probe = snd_rpi_hifiberry_dac_probe,
+ .remove = snd_rpi_hifiberry_dac_remove,
+};
+
+module_platform_driver(snd_rpi_hifiberry_dac_driver);
+
+MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
+MODULE_DESCRIPTION("ASoC Driver for HifiBerry DAC");
+MODULE_LICENSE("GPL v2");
|
