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authorVladimir Barinov <vbarinov@ru.mvista.com>2008-02-18 05:40:22 -0500
committerTakashi Iwai <tiwai@suse.de>2008-04-24 06:00:11 -0400
commit310355c111dbae005269fe3fc39afdd60779bf5d (patch)
treefc792358843354483f86ef6695c5fe83db91a9da
parentb40b04ad380ad641e5740486e4b9a56fd32b64cc (diff)
[ALSA] Davinci ASoC support
Add ASoC support for the TI Davinci SoC and the Davicni-EVM reference board. It includes: - ASoC Davinci DMA driver - ASoC Davinci I2S (Davinci McBSP module based) driver - ASoC Davinci-EVM reference board Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat
-rw-r--r--sound/soc/Kconfig1
-rw-r--r--sound/soc/Makefile2
-rw-r--r--sound/soc/davinci/Kconfig19
-rw-r--r--sound/soc/davinci/Makefile11
-rw-r--r--sound/soc/davinci/davinci-evm.c208
-rw-r--r--sound/soc/davinci/davinci-i2s.c407
-rw-r--r--sound/soc/davinci/davinci-i2s.h17
-rw-r--r--sound/soc/davinci/davinci-pcm.c389
-rw-r--r--sound/soc/davinci/davinci-pcm.h29
9 files changed, 1082 insertions, 1 deletions
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 276585215160..a3b51df2bea1 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -29,6 +29,7 @@ source "sound/soc/pxa/Kconfig"
29source "sound/soc/s3c24xx/Kconfig" 29source "sound/soc/s3c24xx/Kconfig"
30source "sound/soc/sh/Kconfig" 30source "sound/soc/sh/Kconfig"
31source "sound/soc/fsl/Kconfig" 31source "sound/soc/fsl/Kconfig"
32source "sound/soc/davinci/Kconfig"
32 33
33# Supported codecs 34# Supported codecs
34source "sound/soc/codecs/Kconfig" 35source "sound/soc/codecs/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 4869c9ae7a03..e489dbdde458 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -1,4 +1,4 @@
1snd-soc-core-objs := soc-core.o soc-dapm.o 1snd-soc-core-objs := soc-core.o soc-dapm.o
2 2
3obj-$(CONFIG_SND_SOC) += snd-soc-core.o 3obj-$(CONFIG_SND_SOC) += snd-soc-core.o
4obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/ 4obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/
diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig
new file mode 100644
index 000000000000..20680c551aab
--- /dev/null
+++ b/sound/soc/davinci/Kconfig
@@ -0,0 +1,19 @@
1config SND_DAVINCI_SOC
2 tristate "SoC Audio for the TI DAVINCI chip"
3 depends on ARCH_DAVINCI && SND_SOC
4 help
5 Say Y or M if you want to add support for codecs attached to
6 the DAVINCI AC97 or I2S interface. You will also need
7 to select the audio interfaces to support below.
8
9config SND_DAVINCI_SOC_I2S
10 tristate
11
12config SND_DAVINCI_SOC_EVM
13 tristate "SoC Audio support for DaVinci EVM"
14 depends on SND_DAVINCI_SOC && MACH_DAVINCI_EVM
15 select SND_DAVINCI_SOC_I2S
16 select SND_SOC_TLV320AIC3X
17 help
18 Say Y if you want to add support for SoC audio on TI
19 DaVinci EVM platform.
diff --git a/sound/soc/davinci/Makefile b/sound/soc/davinci/Makefile
new file mode 100644
index 000000000000..ca772e5b4637
--- /dev/null
+++ b/sound/soc/davinci/Makefile
@@ -0,0 +1,11 @@
1# DAVINCI Platform Support
2snd-soc-davinci-objs := davinci-pcm.o
3snd-soc-davinci-i2s-objs := davinci-i2s.o
4
5obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
6obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
7
8# DAVINCI Machine Support
9snd-soc-evm-objs := davinci-evm.o
10
11obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o
diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
new file mode 100644
index 000000000000..fcd165240333
--- /dev/null
+++ b/sound/soc/davinci/davinci-evm.c
@@ -0,0 +1,208 @@
1/*
2 * ASoC driver for TI DAVINCI EVM platform
3 *
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/timer.h>
15#include <linux/interrupt.h>
16#include <linux/platform_device.h>
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/soc.h>
20#include <sound/soc-dapm.h>
21
22#include <asm/mach-types.h>
23#include <asm/dma.h>
24#include <asm/arch/hardware.h>
25
26#include "../codecs/tlv320aic3x.h"
27#include "davinci-pcm.h"
28#include "davinci-i2s.h"
29
30#define EVM_CODEC_CLOCK 22579200
31
32static int evm_hw_params(struct snd_pcm_substream *substream,
33 struct snd_pcm_hw_params *params)
34{
35 struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
37 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
38 int ret = 0;
39
40 /* set codec DAI configuration */
41 ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
42 SND_SOC_DAIFMT_CBM_CFM);
43 if (ret < 0)
44 return ret;
45
46 /* set cpu DAI configuration */
47 ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
48 SND_SOC_DAIFMT_IB_NF);
49 if (ret < 0)
50 return ret;
51
52 /* set the codec system clock */
53 ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
54 SND_SOC_CLOCK_OUT);
55 if (ret < 0)
56 return ret;
57
58 return 0;
59}
60
61static struct snd_soc_ops evm_ops = {
62 .hw_params = evm_hw_params,
63};
64
65/* davinci-evm machine dapm widgets */
66static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
67 SND_SOC_DAPM_HP("Headphone Jack", NULL),
68 SND_SOC_DAPM_LINE("Line Out", NULL),
69 SND_SOC_DAPM_MIC("Mic Jack", NULL),
70 SND_SOC_DAPM_LINE("Line In", NULL),
71};
72
73/* davinci-evm machine audio_mapnections to the codec pins */
74static const char *audio_map[][3] = {
75 /* Headphone connected to HPLOUT, HPROUT */
76 {"Headphone Jack", NULL, "HPLOUT"},
77 {"Headphone Jack", NULL, "HPROUT"},
78
79 /* Line Out connected to LLOUT, RLOUT */
80 {"Line Out", NULL, "LLOUT"},
81 {"Line Out", NULL, "RLOUT"},
82
83 /* Mic connected to (MIC3L | MIC3R) */
84 {"MIC3L", NULL, "Mic Bias 2V"},
85 {"MIC3R", NULL, "Mic Bias 2V"},
86 {"Mic Bias 2V", NULL, "Mic Jack"},
87
88 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
89 {"LINE1L", NULL, "Line In"},
90 {"LINE2L", NULL, "Line In"},
91 {"LINE1R", NULL, "Line In"},
92 {"LINE2R", NULL, "Line In"},
93
94 {NULL, NULL, NULL},
95};
96
97/* Logic for a aic3x as connected on a davinci-evm */
98static int evm_aic3x_init(struct snd_soc_codec *codec)
99{
100 int i;
101
102 /* Add davinci-evm specific widgets */
103 for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
104 snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
105
106 /* Set up davinci-evm specific audio path audio_map */
107 for (i = 0; audio_map[i][0] != NULL; i++)
108 snd_soc_dapm_connect_input(codec, audio_map[i][0],
109 audio_map[i][1], audio_map[i][2]);
110
111 /* not connected */
112 snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
113 snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
114 snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
115
116 /* always connected */
117 snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
118 snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
119 snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
120 snd_soc_dapm_set_endpoint(codec, "Line In", 1);
121
122 snd_soc_dapm_sync_endpoints(codec);
123
124 return 0;
125}
126
127/* davinci-evm digital audio interface glue - connects codec <--> CPU */
128static struct snd_soc_dai_link evm_dai = {
129 .name = "TLV320AIC3X",
130 .stream_name = "AIC3X",
131 .cpu_dai = &davinci_i2s_dai,
132 .codec_dai = &aic3x_dai,
133 .init = evm_aic3x_init,
134 .ops = &evm_ops,
135};
136
137/* davinci-evm audio machine driver */
138static struct snd_soc_machine snd_soc_machine_evm = {
139 .name = "DaVinci EVM",
140 .dai_link = &evm_dai,
141 .num_links = 1,
142};
143
144/* evm audio private data */
145static struct aic3x_setup_data evm_aic3x_setup = {
146 .i2c_address = 0x1b,
147};
148
149/* evm audio subsystem */
150static struct snd_soc_device evm_snd_devdata = {
151 .machine = &snd_soc_machine_evm,
152 .platform = &davinci_soc_platform,
153 .codec_dev = &soc_codec_dev_aic3x,
154 .codec_data = &evm_aic3x_setup,
155};
156
157static struct resource evm_snd_resources[] = {
158 {
159 .start = DAVINCI_MCBSP_BASE,
160 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
161 .flags = IORESOURCE_MEM,
162 },
163};
164
165static struct evm_snd_platform_data evm_snd_data = {
166 .tx_dma_ch = DM644X_DMACH_MCBSP_TX,
167 .rx_dma_ch = DM644X_DMACH_MCBSP_RX,
168};
169
170static struct platform_device *evm_snd_device;
171
172static int __init evm_init(void)
173{
174 int ret;
175
176 evm_snd_device = platform_device_alloc("soc-audio", 0);
177 if (!evm_snd_device)
178 return -ENOMEM;
179
180 platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
181 evm_snd_devdata.dev = &evm_snd_device->dev;
182 evm_snd_device->dev.platform_data = &evm_snd_data;
183
184 ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
185 ARRAY_SIZE(evm_snd_resources));
186 if (ret) {
187 platform_device_put(evm_snd_device);
188 return ret;
189 }
190
191 ret = platform_device_add(evm_snd_device);
192 if (ret)
193 platform_device_put(evm_snd_device);
194
195 return ret;
196}
197
198static void __exit evm_exit(void)
199{
200 platform_device_unregister(evm_snd_device);
201}
202
203module_init(evm_init);
204module_exit(evm_exit);
205
206MODULE_AUTHOR("Vladimir Barinov");
207MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
208MODULE_LICENSE("GPL");
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
new file mode 100644
index 000000000000..c421774b33ee
--- /dev/null
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -0,0 +1,407 @@
1/*
2 * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
3 *
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/device.h>
15#include <linux/delay.h>
16#include <linux/io.h>
17#include <linux/clk.h>
18
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/pcm_params.h>
22#include <sound/initval.h>
23#include <sound/soc.h>
24
25#include "davinci-pcm.h"
26
27#define DAVINCI_MCBSP_DRR_REG 0x00
28#define DAVINCI_MCBSP_DXR_REG 0x04
29#define DAVINCI_MCBSP_SPCR_REG 0x08
30#define DAVINCI_MCBSP_RCR_REG 0x0c
31#define DAVINCI_MCBSP_XCR_REG 0x10
32#define DAVINCI_MCBSP_SRGR_REG 0x14
33#define DAVINCI_MCBSP_PCR_REG 0x24
34
35#define DAVINCI_MCBSP_SPCR_RRST (1 << 0)
36#define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4)
37#define DAVINCI_MCBSP_SPCR_XRST (1 << 16)
38#define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20)
39#define DAVINCI_MCBSP_SPCR_GRST (1 << 22)
40#define DAVINCI_MCBSP_SPCR_FRST (1 << 23)
41#define DAVINCI_MCBSP_SPCR_FREE (1 << 25)
42
43#define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5)
44#define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8)
45#define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16)
46#define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21)
47
48#define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5)
49#define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8)
50#define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16)
51#define DAVINCI_MCBSP_XCR_XFIG (1 << 18)
52#define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21)
53
54#define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8)
55#define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16)
56#define DAVINCI_MCBSP_SRGR_FSGM (1 << 28)
57
58#define DAVINCI_MCBSP_PCR_CLKRP (1 << 0)
59#define DAVINCI_MCBSP_PCR_CLKXP (1 << 1)
60#define DAVINCI_MCBSP_PCR_FSRP (1 << 2)
61#define DAVINCI_MCBSP_PCR_FSXP (1 << 3)
62#define DAVINCI_MCBSP_PCR_CLKRM (1 << 8)
63#define DAVINCI_MCBSP_PCR_CLKXM (1 << 9)
64#define DAVINCI_MCBSP_PCR_FSRM (1 << 10)
65#define DAVINCI_MCBSP_PCR_FSXM (1 << 11)
66
67#define MOD_REG_BIT(val, mask, set) do { \
68 if (set) { \
69 val |= mask; \
70 } else { \
71 val &= ~mask; \
72 } \
73} while (0)
74
75enum {
76 DAVINCI_MCBSP_WORD_8 = 0,
77 DAVINCI_MCBSP_WORD_12,
78 DAVINCI_MCBSP_WORD_16,
79 DAVINCI_MCBSP_WORD_20,
80 DAVINCI_MCBSP_WORD_24,
81 DAVINCI_MCBSP_WORD_32,
82};
83
84static struct davinci_pcm_dma_params davinci_i2s_pcm_out = {
85 .name = "I2S PCM Stereo out",
86};
87
88static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
89 .name = "I2S PCM Stereo in",
90};
91
92struct davinci_mcbsp_dev {
93 void __iomem *base;
94 struct clk *clk;
95 struct davinci_pcm_dma_params *dma_params[2];
96};
97
98static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
99 int reg, u32 val)
100{
101 __raw_writel(val, dev->base + reg);
102}
103
104static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg)
105{
106 return __raw_readl(dev->base + reg);
107}
108
109static void davinci_mcbsp_start(struct snd_pcm_substream *substream)
110{
111 struct snd_soc_pcm_runtime *rtd = substream->private_data;
112 struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
113 u32 w;
114
115 /* Start the sample generator and enable transmitter/receiver */
116 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
117 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1);
118 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
119 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
120 else
121 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1);
122 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
123
124 /* Start frame sync */
125 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
126 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1);
127 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
128}
129
130static void davinci_mcbsp_stop(struct snd_pcm_substream *substream)
131{
132 struct snd_soc_pcm_runtime *rtd = substream->private_data;
133 struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
134 u32 w;
135
136 /* Reset transmitter/receiver and sample rate/frame sync generators */
137 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
138 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST |
139 DAVINCI_MCBSP_SPCR_FRST, 0);
140 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
141 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
142 else
143 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0);
144 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
145}
146
147static int davinci_i2s_startup(struct snd_pcm_substream *substream)
148{
149 struct snd_soc_pcm_runtime *rtd = substream->private_data;
150 struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
151 struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
152
153 cpu_dai->dma_data = dev->dma_params[substream->stream];
154
155 return 0;
156}
157
158static int davinci_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
159 unsigned int fmt)
160{
161 struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
162 u32 w;
163
164 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
165 case SND_SOC_DAIFMT_CBS_CFS:
166 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG,
167 DAVINCI_MCBSP_PCR_FSXM |
168 DAVINCI_MCBSP_PCR_FSRM |
169 DAVINCI_MCBSP_PCR_CLKXM |
170 DAVINCI_MCBSP_PCR_CLKRM);
171 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG,
172 DAVINCI_MCBSP_SRGR_FSGM);
173 break;
174 case SND_SOC_DAIFMT_CBM_CFM:
175 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, 0);
176 break;
177 default:
178 return -EINVAL;
179 }
180
181 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
182 case SND_SOC_DAIFMT_IB_NF:
183 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
184 MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
185 DAVINCI_MCBSP_PCR_CLKRP, 1);
186 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
187 break;
188 case SND_SOC_DAIFMT_NB_IF:
189 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
190 MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_FSXP |
191 DAVINCI_MCBSP_PCR_FSRP, 1);
192 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
193 break;
194 case SND_SOC_DAIFMT_IB_IF:
195 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
196 MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
197 DAVINCI_MCBSP_PCR_CLKRP |
198 DAVINCI_MCBSP_PCR_FSXP |
199 DAVINCI_MCBSP_PCR_FSRP, 1);
200 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
201 break;
202 case SND_SOC_DAIFMT_NB_NF:
203 break;
204 default:
205 return -EINVAL;
206 }
207
208 return 0;
209}
210
211static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
212 struct snd_pcm_hw_params *params)
213{
214 struct snd_soc_pcm_runtime *rtd = substream->private_data;
215 struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
216 struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
217 struct snd_interval *i = NULL;
218 int mcbsp_word_length;
219 u32 w;
220
221 /* general line settings */
222 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG,
223 DAVINCI_MCBSP_SPCR_RINTM(3) |
224 DAVINCI_MCBSP_SPCR_XINTM(3) |
225 DAVINCI_MCBSP_SPCR_FREE);
226 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG,
227 DAVINCI_MCBSP_RCR_RFRLEN1(1) |
228 DAVINCI_MCBSP_RCR_RDATDLY(1));
229 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG,
230 DAVINCI_MCBSP_XCR_XFRLEN1(1) |
231 DAVINCI_MCBSP_XCR_XDATDLY(1) |
232 DAVINCI_MCBSP_XCR_XFIG);
233
234 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
235 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
236 MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1), 1);
237 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
238
239 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS);
240 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
241 MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1), 1);
242 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
243
244 /* Determine xfer data type */
245 switch (params_format(params)) {
246 case SNDRV_PCM_FORMAT_S8:
247 dma_params->data_type = 1;
248 mcbsp_word_length = DAVINCI_MCBSP_WORD_8;
249 break;
250 case SNDRV_PCM_FORMAT_S16_LE:
251 dma_params->data_type = 2;
252 mcbsp_word_length = DAVINCI_MCBSP_WORD_16;
253 break;
254 case SNDRV_PCM_FORMAT_S32_LE:
255 dma_params->data_type = 4;
256 mcbsp_word_length = DAVINCI_MCBSP_WORD_32;
257 break;
258 default:
259 printk(KERN_WARNING "davinci-i2s: unsupported PCM format");
260 return -EINVAL;
261 }
262
263 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG);
264 MOD_REG_BIT(w, DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
265 DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length), 1);
266 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, w);
267
268 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG);
269 MOD_REG_BIT(w, DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
270 DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length), 1);
271 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, w);
272
273 return 0;
274}
275
276static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
277{
278 int ret = 0;
279
280 switch (cmd) {
281 case SNDRV_PCM_TRIGGER_START:
282 case SNDRV_PCM_TRIGGER_RESUME:
283 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
284 davinci_mcbsp_start(substream);
285 break;
286 case SNDRV_PCM_TRIGGER_STOP:
287 case SNDRV_PCM_TRIGGER_SUSPEND:
288 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
289 davinci_mcbsp_stop(substream);
290 break;
291 default:
292 ret = -EINVAL;
293 }
294
295 return ret;
296}
297
298static int davinci_i2s_probe(struct platform_device *pdev)
299{
300 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
301 struct snd_soc_machine *machine = socdev->machine;
302 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
303 struct davinci_mcbsp_dev *dev;
304 struct resource *mem, *ioarea;
305 struct evm_snd_platform_data *pdata;
306 int ret;
307
308 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
309 if (!mem) {
310 dev_err(&pdev->dev, "no mem resource?\n");
311 return -ENODEV;
312 }
313
314 ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1,
315 pdev->name);
316 if (!ioarea) {
317 dev_err(&pdev->dev, "McBSP region already claimed\n");
318 return -EBUSY;
319 }
320
321 dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL);
322 if (!dev) {
323 ret = -ENOMEM;
324 goto err_release_region;
325 }
326
327 cpu_dai->private_data = dev;
328
329 dev->clk = clk_get(&pdev->dev, "McBSPCLK");
330 if (IS_ERR(dev->clk)) {
331 ret = -ENODEV;
332 goto err_free_mem;
333 }
334 clk_enable(dev->clk);
335
336 dev->base = (void __iomem *)IO_ADDRESS(mem->start);
337 pdata = pdev->dev.platform_data;
338
339 dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out;
340 dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch;
341 dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr =
342 (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG);
343
344 dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in;
345 dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch;
346 dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr =
347 (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG);
348
349 return 0;
350
351err_free_mem:
352 kfree(dev);
353err_release_region:
354 release_mem_region(mem->start, (mem->end - mem->start) + 1);
355
356 return ret;
357}
358
359static void davinci_i2s_remove(struct platform_device *pdev)
360{
361 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
362 struct snd_soc_machine *machine = socdev->machine;
363 struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
364 struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
365 struct resource *mem;
366
367 clk_disable(dev->clk);
368 clk_put(dev->clk);
369 dev->clk = NULL;
370
371 kfree(dev);
372
373 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
374 release_mem_region(mem->start, (mem->end - mem->start) + 1);
375}
376
377#define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000
378
379struct snd_soc_cpu_dai davinci_i2s_dai = {
380 .name = "davinci-i2s",
381 .id = 0,
382 .type = SND_SOC_DAI_I2S,
383 .probe = davinci_i2s_probe,
384 .remove = davinci_i2s_remove,
385 .playback = {
386 .channels_min = 2,
387 .channels_max = 2,
388 .rates = DAVINCI_I2S_RATES,
389 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
390 .capture = {
391 .channels_min = 2,
392 .channels_max = 2,
393 .rates = DAVINCI_I2S_RATES,
394 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
395 .ops = {
396 .startup = davinci_i2s_startup,
397 .trigger = davinci_i2s_trigger,
398 .hw_params = davinci_i2s_hw_params,},
399 .dai_ops = {
400 .set_fmt = davinci_i2s_set_dai_fmt,
401 },
402};
403EXPORT_SYMBOL_GPL(davinci_i2s_dai);
404
405MODULE_AUTHOR("Vladimir Barinov");
406MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface");
407MODULE_LICENSE("GPL");
diff --git a/sound/soc/davinci/davinci-i2s.h b/sound/soc/davinci/davinci-i2s.h
new file mode 100644
index 000000000000..9592d17db320
--- /dev/null
+++ b/sound/soc/davinci/davinci-i2s.h
@@ -0,0 +1,17 @@
1/*
2 * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
3 *
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#ifndef _DAVINCI_I2S_H
13#define _DAVINCI_I2S_H
14
15extern struct snd_soc_cpu_dai davinci_i2s_dai;
16
17#endif
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
new file mode 100644
index 000000000000..6a76927c9971
--- /dev/null
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -0,0 +1,389 @@
1/*
2 * ALSA PCM interface for the TI DAVINCI processor
3 *
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/platform_device.h>
15#include <linux/slab.h>
16#include <linux/dma-mapping.h>
17
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22
23#include <asm/dma.h>
24
25#include "davinci-pcm.h"
26
27#define DAVINCI_PCM_DEBUG 0
28#if DAVINCI_PCM_DEBUG
29#define DPRINTK(x...) printk(KERN_DEBUG x)
30#else
31#define DPRINTK(x...)
32#endif
33
34static struct snd_pcm_hardware davinci_pcm_hardware = {
35 .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
36 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
37 SNDRV_PCM_INFO_PAUSE),
38 .formats = (SNDRV_PCM_FMTBIT_S16_LE),
39 .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
40 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
41 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
42 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
43 SNDRV_PCM_RATE_KNOT),
44 .rate_min = 8000,
45 .rate_max = 96000,
46 .channels_min = 2,
47 .channels_max = 2,
48 .buffer_bytes_max = 128 * 1024,
49 .period_bytes_min = 32,
50 .period_bytes_max = 8 * 1024,
51 .periods_min = 16,
52 .periods_max = 255,
53 .fifo_size = 0,
54};
55
56struct davinci_runtime_data {
57 spinlock_t lock;
58 int period; /* current DMA period */
59 int master_lch; /* Master DMA channel */
60 int slave_lch; /* Slave DMA channel */
61 struct davinci_pcm_dma_params *params; /* DMA params */
62};
63
64static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
65{
66 struct davinci_runtime_data *prtd = substream->runtime->private_data;
67 struct snd_pcm_runtime *runtime = substream->runtime;
68 int lch = prtd->slave_lch;
69 unsigned int period_size;
70 unsigned int dma_offset;
71 dma_addr_t dma_pos;
72 dma_addr_t src, dst;
73 unsigned short src_bidx, dst_bidx;
74 unsigned int data_type;
75 unsigned int count;
76
77 period_size = snd_pcm_lib_period_bytes(substream);
78 dma_offset = prtd->period * period_size;
79 dma_pos = runtime->dma_addr + dma_offset;
80
81 DPRINTK("audio_set_dma_params_play channel = %d dma_ptr = %x "
82 "period_size=%x\n", lch, dma_pos, period_size);
83
84 data_type = prtd->params->data_type;
85 count = period_size / data_type;
86
87 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
88 src = dma_pos;
89 dst = prtd->params->dma_addr;
90 src_bidx = data_type;
91 dst_bidx = 0;
92 } else {
93 src = prtd->params->dma_addr;
94 dst = dma_pos;
95 src_bidx = 0;
96 dst_bidx = data_type;
97 }
98
99 davinci_set_dma_src_params(lch, src, INCR, W8BIT);
100 davinci_set_dma_dest_params(lch, dst, INCR, W8BIT);
101 davinci_set_dma_src_index(lch, src_bidx, 0);
102 davinci_set_dma_dest_index(lch, dst_bidx, 0);
103 davinci_set_dma_transfer_params(lch, data_type, count, 1, 0, ASYNC);
104
105 prtd->period++;
106 if (unlikely(prtd->period >= runtime->periods))
107 prtd->period = 0;
108}
109
110static void davinci_pcm_dma_irq(int lch, u16 ch_status, void *data)
111{
112 struct snd_pcm_substream *substream = data;
113 struct davinci_runtime_data *prtd = substream->runtime->private_data;
114
115 DPRINTK("lch=%d, status=0x%x\n", lch, ch_status);
116
117 if (unlikely(ch_status != DMA_COMPLETE))
118 return;
119
120 if (snd_pcm_running(substream)) {
121 snd_pcm_period_elapsed(substream);
122
123 spin_lock(&prtd->lock);
124 davinci_pcm_enqueue_dma(substream);
125 spin_unlock(&prtd->lock);
126 }
127}
128
129static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
130{
131 struct davinci_runtime_data *prtd = substream->runtime->private_data;
132 struct snd_soc_pcm_runtime *rtd = substream->private_data;
133 struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
134 int tcc = TCC_ANY;
135 int ret;
136
137 if (!dma_data)
138 return -ENODEV;
139
140 prtd->params = dma_data;
141
142 /* Request master DMA channel */
143 ret = davinci_request_dma(prtd->params->channel, prtd->params->name,
144 davinci_pcm_dma_irq, substream,
145 &prtd->master_lch, &tcc, EVENTQ_0);
146 if (ret)
147 return ret;
148
149 /* Request slave DMA channel */
150 ret = davinci_request_dma(PARAM_ANY, "Link",
151 NULL, NULL, &prtd->slave_lch, &tcc, EVENTQ_0);
152 if (ret) {
153 davinci_free_dma(prtd->master_lch);
154 return ret;
155 }
156
157 /* Link slave DMA channel in loopback */
158 davinci_dma_link_lch(prtd->slave_lch, prtd->slave_lch);
159
160 return 0;
161}
162
163static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
164{
165 struct davinci_runtime_data *prtd = substream->runtime->private_data;
166 int ret = 0;
167
168 spin_lock(&prtd->lock);
169
170 switch (cmd) {
171 case SNDRV_PCM_TRIGGER_START:
172 case SNDRV_PCM_TRIGGER_RESUME:
173 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
174 davinci_start_dma(prtd->master_lch);
175 break;
176 case SNDRV_PCM_TRIGGER_STOP:
177 case SNDRV_PCM_TRIGGER_SUSPEND:
178 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
179 davinci_stop_dma(prtd->master_lch);
180 break;
181 default:
182 ret = -EINVAL;
183 break;
184 }
185
186 spin_unlock(&prtd->lock);
187
188 return ret;
189}
190
191static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
192{
193 struct davinci_runtime_data *prtd = substream->runtime->private_data;
194 struct paramentry_descriptor temp;
195
196 prtd->period = 0;
197 davinci_pcm_enqueue_dma(substream);
198
199 /* Get slave channel dma params for master channel startup */
200 davinci_get_dma_params(prtd->slave_lch, &temp);
201 davinci_set_dma_params(prtd->master_lch, &temp);
202
203 return 0;
204}
205
206static snd_pcm_uframes_t
207davinci_pcm_pointer(struct snd_pcm_substream *substream)
208{
209 struct snd_pcm_runtime *runtime = substream->runtime;
210 struct davinci_runtime_data *prtd = runtime->private_data;
211 unsigned int offset;
212 dma_addr_t count;
213 dma_addr_t src, dst;
214
215 spin_lock(&prtd->lock);
216
217 davinci_dma_getposition(prtd->master_lch, &src, &dst);
218 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
219 count = src - runtime->dma_addr;
220 else
221 count = dst - runtime->dma_addr;;
222
223 spin_unlock(&prtd->lock);
224
225 offset = bytes_to_frames(runtime, count);
226 if (offset >= runtime->buffer_size)
227 offset = 0;
228
229 return offset;
230}
231
232static int davinci_pcm_open(struct snd_pcm_substream *substream)
233{
234 struct snd_pcm_runtime *runtime = substream->runtime;
235 struct davinci_runtime_data *prtd;
236 int ret = 0;
237
238 snd_soc_set_runtime_hwparams(substream, &davinci_pcm_hardware);
239
240 prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL);
241 if (prtd == NULL)
242 return -ENOMEM;
243
244 spin_lock_init(&prtd->lock);
245
246 runtime->private_data = prtd;
247
248 ret = davinci_pcm_dma_request(substream);
249 if (ret) {
250 printk(KERN_ERR "davinci_pcm: Failed to get dma channels\n");
251 kfree(prtd);
252 }
253
254 return ret;
255}
256
257static int davinci_pcm_close(struct snd_pcm_substream *substream)
258{
259 struct snd_pcm_runtime *runtime = substream->runtime;
260 struct davinci_runtime_data *prtd = runtime->private_data;
261
262 davinci_dma_unlink_lch(prtd->slave_lch, prtd->slave_lch);
263
264 davinci_free_dma(prtd->slave_lch);
265 davinci_free_dma(prtd->master_lch);
266
267 kfree(prtd);
268
269 return 0;
270}
271
272static int davinci_pcm_hw_params(struct snd_pcm_substream *substream,
273 struct snd_pcm_hw_params *hw_params)
274{
275 return snd_pcm_lib_malloc_pages(substream,
276 params_buffer_bytes(hw_params));
277}
278
279static int davinci_pcm_hw_free(struct snd_pcm_substream *substream)
280{
281 return snd_pcm_lib_free_pages(substream);
282}
283
284static int davinci_pcm_mmap(struct snd_pcm_substream *substream,
285 struct vm_area_struct *vma)
286{
287 struct snd_pcm_runtime *runtime = substream->runtime;
288
289 return dma_mmap_writecombine(substream->pcm->card->dev, vma,
290 runtime->dma_area,
291 runtime->dma_addr,
292 runtime->dma_bytes);
293}
294
295struct snd_pcm_ops davinci_pcm_ops = {
296 .open = davinci_pcm_open,
297 .close = davinci_pcm_close,
298 .ioctl = snd_pcm_lib_ioctl,
299 .hw_params = davinci_pcm_hw_params,
300 .hw_free = davinci_pcm_hw_free,
301 .prepare = davinci_pcm_prepare,
302 .trigger = davinci_pcm_trigger,
303 .pointer = davinci_pcm_pointer,
304 .mmap = davinci_pcm_mmap,
305};
306
307static int davinci_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
308{
309 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
310 struct snd_dma_buffer *buf = &substream->dma_buffer;
311 size_t size = davinci_pcm_hardware.buffer_bytes_max;
312
313 buf->dev.type = SNDRV_DMA_TYPE_DEV;
314 buf->dev.dev = pcm->card->dev;
315 buf->private_data = NULL;
316 buf->area = dma_alloc_writecombine(pcm->card->dev, size,
317 &buf->addr, GFP_KERNEL);
318
319 DPRINTK("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
320 (void *) buf->area, (void *) buf->addr, size);
321
322 if (!buf->area)
323 return -ENOMEM;
324
325 buf->bytes = size;
326 return 0;
327}
328
329static void davinci_pcm_free(struct snd_pcm *pcm)
330{
331 struct snd_pcm_substream *substream;
332 struct snd_dma_buffer *buf;
333 int stream;
334
335 for (stream = 0; stream < 2; stream++) {
336 substream = pcm->streams[stream].substream;
337 if (!substream)
338 continue;
339
340 buf = &substream->dma_buffer;
341 if (!buf->area)
342 continue;
343
344 dma_free_writecombine(pcm->card->dev, buf->bytes,
345 buf->area, buf->addr);
346 buf->area = NULL;
347 }
348}
349
350static u64 davinci_pcm_dmamask = 0xffffffff;
351
352static int davinci_pcm_new(struct snd_card *card,
353 struct snd_soc_codec_dai *dai, struct snd_pcm *pcm)
354{
355 int ret;
356
357 if (!card->dev->dma_mask)
358 card->dev->dma_mask = &davinci_pcm_dmamask;
359 if (!card->dev->coherent_dma_mask)
360 card->dev->coherent_dma_mask = 0xffffffff;
361
362 if (dai->playback.channels_min) {
363 ret = davinci_pcm_preallocate_dma_buffer(pcm,
364 SNDRV_PCM_STREAM_PLAYBACK);
365 if (ret)
366 return ret;
367 }
368
369 if (dai->capture.channels_min) {
370 ret = davinci_pcm_preallocate_dma_buffer(pcm,
371 SNDRV_PCM_STREAM_CAPTURE);
372 if (ret)
373 return ret;
374 }
375
376 return 0;
377}
378
379struct snd_soc_platform davinci_soc_platform = {
380 .name = "davinci-audio",
381 .pcm_ops = &davinci_pcm_ops,
382 .pcm_new = davinci_pcm_new,
383 .pcm_free = davinci_pcm_free,
384};
385EXPORT_SYMBOL_GPL(davinci_soc_platform);
386
387MODULE_AUTHOR("Vladimir Barinov");
388MODULE_DESCRIPTION("TI DAVINCI PCM DMA module");
389MODULE_LICENSE("GPL");
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
new file mode 100644
index 000000000000..8d6a45e75a6e
--- /dev/null
+++ b/sound/soc/davinci/davinci-pcm.h
@@ -0,0 +1,29 @@
1/*
2 * ALSA PCM interface for the TI DAVINCI processor
3 *
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#ifndef _DAVINCI_PCM_H
13#define _DAVINCI_PCM_H
14
15struct davinci_pcm_dma_params {
16 char *name; /* stream identifier */
17 int channel; /* sync dma channel ID */
18 dma_addr_t dma_addr; /* device physical address for DMA */
19 unsigned int data_type; /* xfer data type */
20};
21
22struct evm_snd_platform_data {
23 int tx_dma_ch;
24 int rx_dma_ch;
25};
26
27extern struct snd_soc_platform davinci_soc_platform;
28
29#endif
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-28 17:34:50 -0400