summaryrefslogtreecommitdiff
path: root/target/arm/raspberry-pi/patches/3.12.33/0001-add-support-for-rpi-proto-driver.patch
blob: e0e97774166a6d28374fef596ac9d43d88825afb (plain)
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
From 70449ef0fb20c168dd341e9bd02dd1929554971c Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbrodkorb@conet.de>
Date: Wed, 29 Oct 2014 16:30:53 +0100
Subject: [PATCH 1/2] add support for rpi-proto driver

Forward port of 3.10.x driver from https://github.com/koalo
We are using a custom board and would like to use rpi 3.12.x
kernel. Patch works fine for our embedded system.

Signed-off-by: Waldemar Brodkorb <wbrodkorb@conet.de>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
---
 arch/arm/mach-bcm2708/bcm2708.c |   17 +++++
 sound/soc/bcm/Kconfig           |    8 +++
 sound/soc/bcm/Makefile          |    2 +
 sound/soc/bcm/rpi-proto.c       |  130 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 157 insertions(+)
 create mode 100644 sound/soc/bcm/rpi-proto.c

diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c
index c1a5943..0a0bb05 100644
--- a/arch/arm/mach-bcm2708/bcm2708.c
+++ b/arch/arm/mach-bcm2708/bcm2708.c
@@ -754,6 +754,19 @@ static struct i2c_board_info __initdata snd_pcm512x_i2c_devices[] = {
 };
 #endif
 
+#ifdef CONFIG_SND_BCM2708_SOC_RPI_CODEC_PROTO_MODULE
+static struct platform_device snd_rpi_proto_device = {
+        .name = "snd-rpi-proto",
+        .id = 0,
+        .num_resources = 0,
+};
+static struct i2c_board_info __initdata snd_rpi_proto_i2c_devices[] = {
+        {
+                I2C_BOARD_INFO("wm8731", 0x1a)
+        },
+};
+#endif
+
 int __init bcm_register_device(struct platform_device *pdev)
 {
 	int ret;
@@ -923,6 +936,10 @@ void __init bcm2708_init(void)
         bcm_register_device(&snd_rpi_iqaudio_dac_device);
         i2c_register_board_info(1, snd_pcm512x_i2c_devices, ARRAY_SIZE(snd_pcm512x_i2c_devices));
 #endif
+#if defined(CONFIG_SND_BCM2708_SOC_RPI_CODEC_PROTO_MODULE)
+	bcm_register_device(&snd_rpi_proto_device);
+	i2c_register_board_info(1, snd_rpi_proto_i2c_devices, ARRAY_SIZE(snd_rpi_proto_i2c_devices));
+#endif
 
 
 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
index 301f758..bfe382a 100644
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -50,3 +50,11 @@ config SND_BCM2708_SOC_IQAUDIO_DAC
 	select SND_SOC_PCM512x
 	help
 	  Say Y or M if you want to add support for IQaudIO-DAC.
+
+config SND_BCM2708_SOC_RPI_CODEC_PROTO
+	tristate "Support for Audio Codec Board - PROTO (WM8731)"
+	depends on SND_BCM2708_SOC_I2S
+	select SND_SOC_WM8731
+	help
+	  Say Y if you want to add support for Audio Codec Board -
+	  PROTO (WM8731)
diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
index 8b5e8bb..d1bf274 100644
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -10,6 +10,7 @@ snd-soc-hifiberry-digi-objs := hifiberry_digi.o
 snd-soc-hifiberry-amp-objs := hifiberry_amp.o
 snd-soc-rpi-dac-objs := rpi-dac.o
 snd-soc-iqaudio-dac-objs := iqaudio-dac.o
+snd-soc-rpi-proto-objs := rpi-proto.o
 
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
@@ -17,3 +18,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
 obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
 obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
+obj-$(CONFIG_SND_BCM2708_SOC_RPI_CODEC_PROTO) += snd-soc-rpi-proto.o
diff --git a/sound/soc/bcm/rpi-proto.c b/sound/soc/bcm/rpi-proto.c
new file mode 100644
index 0000000..70b0166
--- /dev/null
+++ b/sound/soc/bcm/rpi-proto.c
@@ -0,0 +1,130 @@
+/*
+ * ASoC driver for PROTO AudioCODEC (with a WM8731)
+ * connected to a Raspberry Pi
+ *
+ * Author:      Florian Meier, <koalo@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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/wm8731.h"
+
+static const unsigned int wm8731_rates_12288000[] = {
+	8000, 32000, 48000, 96000,
+};
+
+static struct snd_pcm_hw_constraint_list wm8731_constraints_12288000 = {
+	.list = wm8731_rates_12288000,
+	.count = ARRAY_SIZE(wm8731_rates_12288000),
+};
+
+static int snd_rpi_proto_startup(struct snd_pcm_substream *substream)
+{
+	/* Setup constraints, because there is a 12.288 MHz XTAL on the board */
+	snd_pcm_hw_constraint_list(substream->runtime, 0,
+				SNDRV_PCM_HW_PARAM_RATE,
+				&wm8731_constraints_12288000);
+	return 0;
+}
+
+static int snd_rpi_proto_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_dai *cpu_dai = rtd->cpu_dai;
+	int sysclk = 12288000; /* This is fixed on this board */
+
+	/* Set proto bclk */
+	int ret = snd_soc_dai_set_bclk_ratio(cpu_dai,32*2);
+	if (ret < 0){
+		dev_err(substream->pcm->dev,
+				"Failed to set BCLK ratio %d\n", ret);
+		return ret;
+	}
+
+	/* Set proto sysclk */
+	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
+			sysclk, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(substream->pcm->dev,
+				"Failed to set WM8731 SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_rpi_proto_ops = {
+	.startup = snd_rpi_proto_startup,
+	.hw_params = snd_rpi_proto_hw_params,
+};
+
+static struct snd_soc_dai_link snd_rpi_proto_dai[] = {
+{
+	.name		= "WM8731",
+	.stream_name	= "WM8731 HiFi",
+	.cpu_dai_name	= "bcm2708-i2s.0",
+	.codec_dai_name	= "wm8731-hifi",
+	.platform_name	= "bcm2708-i2s.0",
+	.codec_name	= "wm8731.1-001a",
+	.dai_fmt	= SND_SOC_DAIFMT_I2S
+				| SND_SOC_DAIFMT_NB_NF
+				| SND_SOC_DAIFMT_CBM_CFM,
+	.ops		= &snd_rpi_proto_ops,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_proto = {
+	.name		= "snd_rpi_proto",
+	.dai_link	= snd_rpi_proto_dai,
+	.num_links	= ARRAY_SIZE(snd_rpi_proto_dai),
+};
+
+static int snd_rpi_proto_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	snd_rpi_proto.dev = &pdev->dev;
+	ret = snd_soc_register_card(&snd_rpi_proto);
+	if (ret) {
+		dev_err(&pdev->dev,
+				"snd_soc_register_card() failed: %d\n", ret);
+	}
+
+	return ret;
+}
+
+
+static int snd_rpi_proto_remove(struct platform_device *pdev)
+{
+	return snd_soc_unregister_card(&snd_rpi_proto);
+}
+
+static struct platform_driver snd_rpi_proto_driver = {
+	.driver = {
+		.name   = "snd-rpi-proto",
+		.owner  = THIS_MODULE,
+	},
+	.probe	  = snd_rpi_proto_probe,
+	.remove	 = snd_rpi_proto_remove,
+};
+
+module_platform_driver(snd_rpi_proto_driver);
+
+MODULE_AUTHOR("Florian Meier");
+MODULE_DESCRIPTION("ASoC Driver for Raspberry Pi connected to PROTO board (WM8731)");
+MODULE_LICENSE("GPL");
-- 
1.7.10.4