aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/pxa/patches-2.6.21/028-gumstix-asoc.patch
blob: 48e64b57640994733d00a73deeb29da17603a428 (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
Index: linux-2.6.21gum/sound/soc/pxa/Kconfig
===================================================================
--- linux-2.6.21gum.orig/sound/soc/pxa/Kconfig
+++ linux-2.6.21gum/sound/soc/pxa/Kconfig
@@ -16,6 +16,7 @@ config SND_PXA2XX_SOC_AC97
 	tristate
 	select AC97_BUS
 	select SND_SOC_AC97_BUS
+	select SND_PXA2XX_AC97
 
 config SND_PXA2XX_SOC_I2S
 	tristate
@@ -56,4 +57,12 @@ config SND_PXA2XX_SOC_TOSA
 	  Say Y if you want to add support for SoC audio on Sharp
 	  Zaurus SL-C6000x models (Tosa).
 
+config SND_PXA2XX_SOC_GUMSTIX
+	tristate "SoC AC97 Audio support for Gumstix"
+	depends on SND_PXA2XX_SOC && ARCH_GUMSTIX
+	select SND_PXA2XX_SOC_AC97
+	select SND_SOC_AC97_CODEC
+	help
+	  Say Y if you want to add support for SoC audio on Gumstix
+
 endmenu
Index: linux-2.6.21gum/sound/soc/pxa/Makefile
===================================================================
--- linux-2.6.21gum.orig/sound/soc/pxa/Makefile
+++ linux-2.6.21gum/sound/soc/pxa/Makefile
@@ -12,9 +12,11 @@ snd-soc-corgi-objs := corgi.o
 snd-soc-poodle-objs := poodle.o
 snd-soc-tosa-objs := tosa.o
 snd-soc-spitz-objs := spitz.o
+snd-soc-gumstix-objs := gumstix.o
 
 obj-$(CONFIG_SND_PXA2XX_SOC_CORGI) += snd-soc-corgi.o
 obj-$(CONFIG_SND_PXA2XX_SOC_POODLE) += snd-soc-poodle.o
 obj-$(CONFIG_SND_PXA2XX_SOC_TOSA) += snd-soc-tosa.o
 obj-$(CONFIG_SND_PXA2XX_SOC_SPITZ) += snd-soc-spitz.o
+obj-$(CONFIG_SND_PXA2XX_SOC_GUMSTIX) += snd-soc-gumstix.o
 
Index: linux-2.6.21gum/sound/soc/pxa/gumstix.c
===================================================================
--- /dev/null
+++ linux-2.6.21gum/sound/soc/pxa/gumstix.c
@@ -0,0 +1,109 @@
+/*
+ * gumstix.c  --  SoC audio for Gumstix
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ * Copyright 2007 Gumstix Inc.
+ *
+ * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+ *          Richard Purdie <richard@openedhand.com>
+ *          Craig Hughes <craig@gumstix.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  Revision history
+ *    26 April 2007 - Initial revision forked from tosa.c
+ *
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/audio.h>
+#include <asm/arch/gumstix.h>
+
+#include "pxa2xx-pcm.h"
+#include "pxa2xx-ac97.h"
+#include "../codecs/ac97.h"
+
+static struct snd_soc_machine gumstix;
+
+static int gumstix_ac97_init(struct snd_soc_codec *codec)
+{
+	// For now, do nothing -- should move the ucb1400 patch stuff here
+	return 0;
+}
+
+/* For right now, just add UCB1400 -- once that's working, we can also add
+ * PCM channels via SPI to bluetooth module, GSM module, or whatnot */
+static struct snd_soc_dai_link gumstix_dai[] = {
+{
+	.name = "ucb1400",
+	.stream_name = "UCB1400",
+	.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
+	.codec_dai = &ac97_dai,
+	.init = gumstix_ac97_init,
+},
+};
+
+static struct snd_soc_machine snd_soc_machine_gumstix = {
+	.name = "Gumstix",
+	.dai_link = gumstix_dai,
+	.num_links = ARRAY_SIZE(gumstix_dai),
+};
+
+static struct snd_soc_device gumstix_snd_devdata = {
+	.machine = &snd_soc_machine_gumstix,
+	.platform = &pxa2xx_soc_platform,
+	.codec_dev = &soc_codec_dev_ac97,
+};
+
+static struct platform_device *gumstix_snd_device;
+
+static int __init gumstix_init(void)
+{
+	int ret;
+
+	if (!machine_is_gumstix())
+		return -ENODEV;
+
+	gumstix_snd_device = platform_device_alloc("soc-audio", -1);
+	if (!gumstix_snd_device)
+		return -ENOMEM;
+
+	platform_set_drvdata(gumstix_snd_device, &gumstix_snd_devdata);
+	gumstix_snd_devdata.dev = &gumstix_snd_device->dev;
+	ret = platform_device_add(gumstix_snd_device);
+
+	if (ret)
+		platform_device_put(gumstix_snd_device);
+
+	return ret;
+}
+
+static void __exit gumstix_exit(void)
+{
+	platform_device_unregister(gumstix_snd_device);
+}
+
+module_init(gumstix_init);
+module_exit(gumstix_exit);
+
+/* Module information */
+MODULE_AUTHOR("Craig Hughes <craig@gumstix.com>");
+MODULE_DESCRIPTION("ALSA SoC Gumstix");
+MODULE_LICENSE("GPL");
Index: linux-2.6.21gum/sound/soc/codecs/ac97.c
===================================================================
--- linux-2.6.21gum.orig/sound/soc/codecs/ac97.c
+++ linux-2.6.21gum/sound/soc/codecs/ac97.c
@@ -43,7 +43,7 @@ static int ac97_prepare(struct snd_pcm_s
 #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 		SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 
-static struct snd_soc_codec_dai ac97_dai = {
+struct snd_soc_codec_dai ac97_dai = {
 	.name = "AC97 HiFi",
 	.playback = {
 		.stream_name = "AC97 Playback",
@@ -61,6 +61,8 @@ static struct snd_soc_codec_dai ac97_dai
 		.prepare = ac97_prepare,},
 };
 
+EXPORT_SYMBOL_GPL(ac97_dai);
+
 static unsigned int ac97_read(struct snd_soc_codec *codec,
 	unsigned int reg)
 {
Index: linux-2.6.21gum/sound/soc/codecs/ac97.h
===================================================================
--- linux-2.6.21gum.orig/sound/soc/codecs/ac97.h
+++ linux-2.6.21gum/sound/soc/codecs/ac97.h
@@ -14,5 +14,6 @@
 #define __LINUX_SND_SOC_AC97_H
 
 extern struct snd_soc_codec_device soc_codec_dev_ac97;
+extern struct snd_soc_codec_dai ac97_dai;
 
 #endif
Index: linux-2.6.21gum/sound/soc/pxa/pxa2xx-ac97.c
===================================================================
--- linux-2.6.21gum.orig/sound/soc/pxa/pxa2xx-ac97.c
+++ linux-2.6.21gum/sound/soc/pxa/pxa2xx-ac97.c
@@ -154,18 +154,26 @@ static void pxa2xx_ac97_warm_reset(struc
 
 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
 {
-	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */
-	GCR &= ~GCR_COLD_RST;  /* then assert nCRST */
-
-	gsr_bits = 0;
 #ifdef CONFIG_PXA27x
 	/* PXA27x Developers Manual section 13.5.2.2.1 */
+	GCR |= GCR_ACLINK_OFF;
+	udelay(5);
+	GCR &= GCR_COLD_RST;	/* Mask all interrupts */
+	GCR &= ~GCR_COLD_RST;	/* cold reset */
+	udelay(5);
 	pxa_set_cken(1 << 31, 1);
 	udelay(5);
-	pxa_set_cken(1 << 31, 0);
+	GCR |= GCR_PRIRDY_IEN|GCR_SECRDY_IEN; /* unmask the interrupts */
+	pxa_set_cken(1 << 31, 0); /* clear CKEN31 */
+	udelay(5);
 	GCR = GCR_COLD_RST;
 	udelay(50);
+	wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
 #else
+	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */
+	GCR &= ~GCR_COLD_RST;  /* then assert nCRST */
+
+	gsr_bits = 0;
 	GCR = GCR_COLD_RST;
 	GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
 	wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);