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Hugo Villeneuve08bd1682008-11-19 01:37:32 -05001/*
2 * ASoC driver for Lyrtech SFFSDR board.
3 *
4 * Author: Hugo Villeneuve
5 * Copyright (C) 2008 Lyrtech inc
6 *
7 * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
8 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/timer.h>
18#include <linux/interrupt.h>
19#include <linux/platform_device.h>
20#include <linux/gpio.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/soc.h>
24#include <sound/soc-dapm.h>
25
26#include <asm/dma.h>
27#include <asm/plat-sffsdr/sffsdr-fpga.h>
28
29#include <mach/mcbsp.h>
30#include <mach/edma.h>
31
32#include "../codecs/pcm3008.h"
33#include "davinci-pcm.h"
34#include "davinci-i2s.h"
35
36static int sffsdr_hw_params(struct snd_pcm_substream *substream,
37 struct snd_pcm_hw_params *params)
38{
39 struct snd_soc_pcm_runtime *rtd = substream->private_data;
40 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
41 int fs;
42 int ret = 0;
43
44 /* Set cpu DAI configuration:
45 * CLKX and CLKR are the inputs for the Sample Rate Generator.
46 * FSX and FSR are outputs, driven by the sample Rate Generator. */
47 ret = snd_soc_dai_set_fmt(cpu_dai,
48 SND_SOC_DAIFMT_RIGHT_J |
49 SND_SOC_DAIFMT_CBM_CFS |
50 SND_SOC_DAIFMT_IB_NF);
51 if (ret < 0)
52 return ret;
53
54 /* Fsref can be 32000, 44100 or 48000. */
55 fs = params_rate(params);
56
57 pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
58
59 return sffsdr_fpga_set_codec_fs(fs);
60}
61
62static struct snd_soc_ops sffsdr_ops = {
63 .hw_params = sffsdr_hw_params,
64};
65
66/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
67static struct snd_soc_dai_link sffsdr_dai = {
68 .name = "PCM3008", /* Codec name */
69 .stream_name = "PCM3008 HiFi",
70 .cpu_dai = &davinci_i2s_dai,
71 .codec_dai = &pcm3008_dai,
72 .ops = &sffsdr_ops,
73};
74
75/* davinci-sffsdr audio machine driver */
76static struct snd_soc_machine snd_soc_machine_sffsdr = {
77 .name = "DaVinci SFFSDR",
78 .dai_link = &sffsdr_dai,
79 .num_links = 1,
80};
81
82/* sffsdr audio private data */
83static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
84 .dem0_pin = GPIO(45),
85 .dem1_pin = GPIO(46),
86 .pdad_pin = GPIO(47),
87 .pdda_pin = GPIO(38),
88};
89
90/* sffsdr audio subsystem */
91static struct snd_soc_device sffsdr_snd_devdata = {
92 .machine = &snd_soc_machine_sffsdr,
93 .platform = &davinci_soc_platform,
94 .codec_dev = &soc_codec_dev_pcm3008,
95 .codec_data = &sffsdr_pcm3008_setup,
96};
97
98static struct resource sffsdr_snd_resources[] = {
99 {
100 .start = DAVINCI_MCBSP_BASE,
101 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
102 .flags = IORESOURCE_MEM,
103 },
104};
105
106static struct evm_snd_platform_data sffsdr_snd_data = {
107 .tx_dma_ch = DAVINCI_DMA_MCBSP_TX,
108 .rx_dma_ch = DAVINCI_DMA_MCBSP_RX,
109};
110
111static struct platform_device *sffsdr_snd_device;
112
113static int __init sffsdr_init(void)
114{
115 int ret;
116
117 sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
118 if (!sffsdr_snd_device) {
119 printk(KERN_ERR "platform device allocation failed\n");
120 return -ENOMEM;
121 }
122
123 platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);
124 sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;
125 sffsdr_snd_device->dev.platform_data = &sffsdr_snd_data;
126
127 ret = platform_device_add_resources(sffsdr_snd_device,
128 sffsdr_snd_resources,
129 ARRAY_SIZE(sffsdr_snd_resources));
130 if (ret) {
131 printk(KERN_ERR "platform device add ressources failed\n");
132 goto error;
133 }
134
135 ret = platform_device_add(sffsdr_snd_device);
136 if (ret)
137 goto error;
138
139 return ret;
140
141error:
142 platform_device_put(sffsdr_snd_device);
143 return ret;
144}
145
146static void __exit sffsdr_exit(void)
147{
148 platform_device_unregister(sffsdr_snd_device);
149}
150
151module_init(sffsdr_init);
152module_exit(sffsdr_exit);
153
154MODULE_AUTHOR("Hugo Villeneuve");
155MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
156MODULE_LICENSE("GPL");