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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
From a20dbe4972ea3df27f24c5397102e1346462a4f4 Mon Sep 17 00:00:00 2001
From: Miquel <miquelblauw@hotmail.com>
Date: Fri, 24 Feb 2017 20:51:06 +0100
Subject: [PATCH] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT
Signed-off-by: Miquel Blauw <info@dionaudio.nl>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 19 +++++
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
sound/soc/bcm/Kconfig | 7 ++
sound/soc/bcm/Makefile | 2 +
sound/soc/bcm/dionaudio_loco-v2.c | 140 ++++++++++++++++++++++++++++++++++++
7 files changed, 171 insertions(+)
create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -13,6 +13,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
bmp085_i2c-sensor.dtbo \
dht11.dtbo \
dionaudio-loco.dtbo \
+ dionaudio-loco-v2.dtbo \
dpi18.dtbo \
dpi24.dtbo \
dwc-otg.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -308,6 +308,25 @@ Load: dtoverlay=dionaudio-loco
Params: <None>
+Name: dionaudio-loco-v2
+Info: Configures the Dion Audio LOCO-V2 DAC-AMP
+Load: dtoverlay=dionaudio-loco-v2,<param>=<val>
+Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec
+ Digital volume control. Enable with
+ "dtoverlay=hifiberry-dacplus,24db_digital_gain"
+ (The default behaviour is that the Digital
+ volume control is limited to a maximum of
+ 0dB. ie. it can attenuate but not provide
+ gain. For most users, this will be desired
+ as it will prevent clipping. By appending
+ the 24dB_digital_gain parameter, the Digital
+ volume control will allow up to 24dB of
+ gain. If this parameter is enabled, it is the
+ responsibility of the user to ensure that
+ the Digital volume control is set to a value
+ that does not result in clipping/distortion!)
+
+
Name: dpi18
Info: Overlay for a generic 18-bit DPI display
This uses GPIOs 0-21 (so no I2C, uart etc.), and activates the output
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -889,6 +889,7 @@ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
CONFIG_SND_DIGIDAC1_SOUNDCARD=m
CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m
+CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m
CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
CONFIG_SND_PISOUND=m
CONFIG_SND_SOC_ADAU1701=m
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -883,6 +883,7 @@ CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
CONFIG_SND_DIGIDAC1_SOUNDCARD=m
CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO=m
+CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2=m
CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC=m
CONFIG_SND_PISOUND=m
CONFIG_SND_SOC_ADAU1701=m
--- a/sound/soc/bcm/Kconfig
+++ b/sound/soc/bcm/Kconfig
@@ -133,6 +133,13 @@ config SND_BCM2708_SOC_DIONAUDIO_LOCO
help
Say Y or M if you want to add support for Dion Audio LOCO.
+config SND_BCM2708_SOC_DIONAUDIO_LOCO_V2
+ tristate "Support for Dion Audio LOCO-V2 DAC-AMP"
+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
+ select SND_SOC_PCM5122
+ help
+ Say Y or M if you want to add support for Dion Audio LOCO-V2.
+
config SND_BCM2708_SOC_ALLO_PIANO_DAC
tristate "Support for Allo Piano DAC"
depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
--- a/sound/soc/bcm/Makefile
+++ b/sound/soc/bcm/Makefile
@@ -25,6 +25,7 @@ snd-soc-raspidac3-objs := raspidac3.o
snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
snd-soc-dionaudio-loco-objs := dionaudio_loco.o
+snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o
snd-soc-allo-piano-dac-objs := allo-piano-dac.o
snd-soc-pisound-objs := pisound.o
@@ -44,5 +45,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3)
obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
+obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o
obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
obj-$(CONFIG_SND_PISOUND) += snd-soc-pisound.o
--- /dev/null
+++ b/sound/soc/bcm/dionaudio_loco-v2.c
@@ -0,0 +1,140 @@
+/*
+ * ASoC Driver for Dion Audio LOCO-V2 DAC-AMP
+ *
+ * Author: Miquel Blauw <info@dionaudio.nl>
+ * Copyright 2017
+ *
+ * Based on the software of the RPi-DAC writen by Florian Meier
+ *
+ * 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 bool digital_gain_0db_limit = true;
+
+static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd)
+{
+ if (digital_gain_0db_limit) {
+ int ret;
+ struct snd_soc_card *card = rtd->card;
+
+ ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
+ if (ret < 0)
+ dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
+ }
+
+ return 0;
+}
+
+static int snd_rpi_dionaudio_loco_v2_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_dionaudio_loco_v2_ops = {
+ .hw_params = snd_rpi_dionaudio_loco_v2_hw_params,
+};
+
+static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = {
+{
+ .name = "DionAudio LOCO-V2",
+ .stream_name = "DionAudio LOCO-V2 DAC-AMP",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "pcm512x-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "pcm512x.1-004d",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+ .ops = &snd_rpi_dionaudio_loco_v2_ops,
+ .init = snd_rpi_dionaudio_loco_v2_init,
+},};
+
+/* audio machine driver */
+static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = {
+ .name = "Dion Audio LOCO-V2",
+ .dai_link = snd_rpi_dionaudio_loco_v2_dai,
+ .num_links = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai),
+};
+
+static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_rpi_dionaudio_loco_v2.dev = &pdev->dev;
+
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai =
+ &snd_rpi_dionaudio_loco_v2_dai[0];
+
+ i2s_node = of_parse_phandle(pdev->dev.of_node,
+ "i2s-controller", 0);
+ if (i2s_node) {
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+ }
+
+ digital_gain_0db_limit = !of_property_read_bool(
+ pdev->dev.of_node, "dionaudio,24db_digital_gain");
+ }
+
+ ret = snd_soc_register_card(&snd_rpi_dionaudio_loco_v2);
+ if (ret)
+ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+ ret);
+
+ return ret;
+}
+
+static int snd_rpi_dionaudio_loco_v2_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&snd_rpi_dionaudio_loco_v2);
+}
+
+static const struct of_device_id dionaudio_of_match[] = {
+ { .compatible = "dionaudio,dionaudio-loco-v2", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dionaudio_of_match);
+
+static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = {
+ .driver = {
+ .name = "snd-rpi-dionaudio-loco-v2",
+ .owner = THIS_MODULE,
+ .of_match_table = dionaudio_of_match,
+ },
+ .probe = snd_rpi_dionaudio_loco_v2_probe,
+ .remove = snd_rpi_dionaudio_loco_v2_remove,
+};
+
+module_platform_driver(snd_rpi_dionaudio_loco_v2_driver);
+
+MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
+MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2");
+MODULE_LICENSE("GPL v2");
|
