Root/target/linux/xburst/patches-2.6.36/011-n526-sound.patch

1From d2e198ed9ade74e2cb042ade405071ab58b11e33 Mon Sep 17 00:00:00 2001
2From: Lars-Peter Clausen <lars@metafoo.de>
3Date: Sat, 24 Apr 2010 12:38:41 +0200
4Subject: [PATCH] Add N526 sound SoC board driver
5
6---
7 sound/soc/jz4740/Kconfig | 8 ++
8 sound/soc/jz4740/Makefile | 2 +
9 sound/soc/jz4740/n526.c | 169 +++++++++++++++++++++++++++++++++++++++++++++
10 3 files changed, 179 insertions(+), 0 deletions(-)
11 create mode 100644 sound/soc/jz4740/n526.c
12
13--- a/sound/soc/jz4740/Kconfig
14+++ b/sound/soc/jz4740/Kconfig
15@@ -29,3 +29,11 @@ config SND_JZ4740_SOC_N516
16     select SND_SOC_JZCODEC
17     help
18       Say Y if you want to enable support for SoC audio on the Hanvon N516.
19+
20+config SND_JZ4740_SOC_N526
21+ tristate "SoC Audio support for Hanvon N526 eBook reader"
22+ depends on SND_JZ4740_SOC && JZ4740_N526
23+ select SND_JZ4740_SOC_I2S
24+ select SND_SOC_JZCODEC
25+ help
26+ Say Y if you want to enable support for SoC audio on the Hanvon N526.
27--- a/sound/soc/jz4740/Makefile
28+++ b/sound/soc/jz4740/Makefile
29@@ -10,6 +10,8 @@ obj-$(CONFIG_SND_JZ4740_SOC_I2S) += snd-
30 # Jz4740 Machine Support
31 snd-soc-qi-lb60-objs := qi_lb60.o
32 snd-soc-n516-objs := n516.o
33+snd-soc-n526-objs := n526.o
34 
35 obj-$(CONFIG_SND_JZ4740_SOC_QI_LB60) += snd-soc-qi-lb60.o
36 obj-$(CONFIG_SND_JZ4740_SOC_N516) += snd-soc-n516.o
37+obj-$(CONFIG_SND_JZ4740_SOC_N526) += snd-soc-n526.o
38--- /dev/null
39+++ b/sound/soc/jz4740/n526.c
40@@ -0,0 +1,169 @@
41+/*
42+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
43+ *
44+ * This program is free software; you can redistribute it and/or modify
45+ * it under the terms of the GNU General Public License version 2 as
46+ * published by the Free Software Foundation.
47+ *
48+ * You should have received a copy of the GNU General Public License along
49+ * with this program; if not, write to the Free Software Foundation, Inc.,
50+ * 675 Mass Ave, Cambridge, MA 02139, USA.
51+ *
52+ */
53+
54+#include <linux/module.h>
55+#include <linux/moduleparam.h>
56+#include <linux/timer.h>
57+#include <linux/interrupt.h>
58+#include <linux/platform_device.h>
59+#include <sound/core.h>
60+#include <sound/pcm.h>
61+#include <sound/soc.h>
62+#include <sound/soc-dapm.h>
63+#include <linux/gpio.h>
64+
65+#include "../codecs/jzcodec.h"
66+#include "jz4740-pcm.h"
67+#include "jz4740-i2s.h"
68+
69+#define N526_AMP_EN_GPIO JZ_GPIO_PORTD(4)
70+
71+static int n526_spk_event(struct snd_soc_dapm_widget *widget,
72+ struct snd_kcontrol *ctrl, int event)
73+{
74+ gpio_set_value(N526_AMP_EN_GPIO, !SND_SOC_DAPM_EVENT_OFF(event));
75+ return 0;
76+}
77+
78+static const struct snd_soc_dapm_widget n526_widgets[] = {
79+ SND_SOC_DAPM_SPK("Speaker", n526_spk_event),
80+ SND_SOC_DAPM_HP("Headphone", NULL),
81+ SND_SOC_DAPM_MIC("Mic", NULL),
82+};
83+
84+static const struct snd_soc_dapm_route n526_routes[] = {
85+ {"Mic", NULL, "MIC"},
86+ {"Speaker", NULL, "LOUT"},
87+ {"Speaker", NULL, "ROUT"},
88+ {"Headphone", NULL, "LOUT"},
89+ {"Headphone", NULL, "ROUT"},
90+};
91+
92+static const struct snd_kcontrol_new n526_controls[] = {
93+ SOC_DAPM_PIN_SWITCH("Speaker"),
94+};
95+
96+#define N526_DAIFMT (SND_SOC_DAIFMT_I2S | \
97+ SND_SOC_DAIFMT_NB_NF | \
98+ SND_SOC_DAIFMT_CBM_CFM)
99+
100+static int n526_codec_init(struct snd_soc_codec *codec)
101+{
102+ int ret;
103+ struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
104+ struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
105+
106+ snd_soc_dapm_nc_pin(codec, "LIN");
107+ snd_soc_dapm_nc_pin(codec, "RIN");
108+
109+ ret = snd_soc_dai_set_fmt(codec_dai, N526_DAIFMT);
110+ if (ret < 0) {
111+ dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
112+ return ret;
113+ }
114+
115+ ret = snd_soc_dai_set_fmt(cpu_dai, N526_DAIFMT);
116+ if (ret < 0) {
117+ dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
118+ return ret;
119+ }
120+
121+ ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
122+ SND_SOC_CLOCK_IN);
123+ if (ret < 0) {
124+ dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
125+ return ret;
126+ }
127+
128+ snd_soc_dapm_new_controls(codec, n526_widgets, ARRAY_SIZE(n526_widgets));
129+
130+ snd_soc_add_controls(codec, n526_controls,
131+ ARRAY_SIZE(n526_controls));
132+
133+ snd_soc_dapm_add_routes(codec, n526_routes, ARRAY_SIZE(n526_routes));
134+
135+ snd_soc_dapm_sync(codec);
136+
137+ return 0;
138+}
139+
140+static struct snd_soc_dai_link n526_dai = {
141+ .name = "jz-codec",
142+ .stream_name = "JZCODEC",
143+ .cpu_dai = &jz4740_i2s_dai,
144+ .codec_dai = &jz_codec_dai,
145+ .init = n526_codec_init,
146+};
147+
148+static struct snd_soc_card n526 = {
149+ .name = "N526",
150+ .dai_link = &n526_dai,
151+ .num_links = 1,
152+ .platform = &jz4740_soc_platform,
153+};
154+
155+static struct snd_soc_device n526_snd_devdata = {
156+ .card = &n526,
157+ .codec_dev = &soc_codec_dev_jzcodec,
158+};
159+
160+static struct platform_device *n526_snd_device;
161+
162+static int __init n526_init(void)
163+{
164+ int ret;
165+
166+ n526_snd_device = platform_device_alloc("soc-audio", -1);
167+
168+ if (!n526_snd_device)
169+ return -ENOMEM;
170+
171+ ret = gpio_request(N526_AMP_EN_GPIO, "AMP");
172+ if (ret) {
173+ pr_err("n526 snd: Failed to request AMP GPIO(%d): %d\n",
174+ N526_AMP_EN_GPIO, ret);
175+ goto err_device_put;
176+ }
177+
178+ gpio_direction_output(JZ_GPIO_PORTD(4), 0);
179+
180+ platform_set_drvdata(n526_snd_device, &n526_snd_devdata);
181+ n526_snd_devdata.dev = &n526_snd_device->dev;
182+ ret = platform_device_add(n526_snd_device);
183+ if (ret) {
184+ pr_err("n526 snd: Failed to add snd soc device: %d\n", ret);
185+ goto err_unset_pdata;
186+ }
187+
188+ return 0;
189+
190+err_unset_pdata:
191+ platform_set_drvdata(n526_snd_device, NULL);
192+ gpio_free(N526_AMP_EN_GPIO);
193+err_device_put:
194+ platform_device_put(n526_snd_device);
195+
196+ return ret;
197+}
198+module_init(n526_init);
199+
200+static void __exit n526_exit(void)
201+{
202+ gpio_free(N526_AMP_EN_GPIO);
203+ platform_device_unregister(n526_snd_device);
204+}
205+module_exit(n526_exit);
206+
207+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
208+MODULE_DESCRIPTION("ALSA SoC N526 audio support");
209+MODULE_LICENSE("GPL v2");
210

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