2 * ASoC driver for Lyrtech SFFSDR board.
4 * Author: Hugo Villeneuve
5 * Copyright (C) 2008 Lyrtech inc
7 * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
8 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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.
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>
27 #include <asm/mach-types.h>
28 #include <asm/plat-sffsdr/sffsdr-fpga.h>
30 #include <mach/mcbsp.h>
31 #include <mach/edma.h>
33 #include "../codecs/pcm3008.h"
34 #include "davinci-pcm.h"
35 #include "davinci-i2s.h"
37 static int sffsdr_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params,
39 struct snd_soc_dai *dai)
41 struct snd_soc_pcm_runtime *rtd = substream->private_data;
42 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
46 /* Set cpu DAI configuration:
47 * CLKX and CLKR are the inputs for the Sample Rate Generator.
48 * FSX and FSR are outputs, driven by the sample Rate Generator. */
49 ret = snd_soc_dai_set_fmt(cpu_dai,
50 SND_SOC_DAIFMT_RIGHT_J |
51 SND_SOC_DAIFMT_CBM_CFS |
52 SND_SOC_DAIFMT_IB_NF);
56 /* Fsref can be 32000, 44100 or 48000. */
57 fs = params_rate(params);
59 pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
61 return sffsdr_fpga_set_codec_fs(fs);
64 static struct snd_soc_ops sffsdr_ops = {
65 .hw_params = sffsdr_hw_params,
68 /* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
69 static struct snd_soc_dai_link sffsdr_dai = {
70 .name = "PCM3008", /* Codec name */
71 .stream_name = "PCM3008 HiFi",
72 .cpu_dai = &davinci_i2s_dai,
73 .codec_dai = &pcm3008_dai,
77 /* davinci-sffsdr audio machine driver */
78 static struct snd_soc_card snd_soc_sffsdr = {
79 .name = "DaVinci SFFSDR",
80 .platform = &davinci_soc_platform,
81 .dai_link = &sffsdr_dai,
85 /* sffsdr audio private data */
86 static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
93 /* sffsdr audio subsystem */
94 static struct snd_soc_device sffsdr_snd_devdata = {
95 .card = &snd_soc_sffsdr,
96 .codec_dev = &soc_codec_dev_pcm3008,
97 .codec_data = &sffsdr_pcm3008_setup,
100 static struct resource sffsdr_snd_resources[] = {
102 .start = DAVINCI_MCBSP_BASE,
103 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
104 .flags = IORESOURCE_MEM,
108 static struct evm_snd_platform_data sffsdr_snd_data = {
109 .tx_dma_ch = DAVINCI_DMA_MCBSP_TX,
110 .rx_dma_ch = DAVINCI_DMA_MCBSP_RX,
113 static struct platform_device *sffsdr_snd_device;
115 static int __init sffsdr_init(void)
119 if (!machine_is_sffsdr())
122 sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
123 if (!sffsdr_snd_device) {
124 printk(KERN_ERR "platform device allocation failed\n");
128 platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);
129 sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;
130 sffsdr_snd_device->dev.platform_data = &sffsdr_snd_data;
132 ret = platform_device_add_resources(sffsdr_snd_device,
133 sffsdr_snd_resources,
134 ARRAY_SIZE(sffsdr_snd_resources));
136 printk(KERN_ERR "platform device add ressources failed\n");
140 ret = platform_device_add(sffsdr_snd_device);
147 platform_device_put(sffsdr_snd_device);
151 static void __exit sffsdr_exit(void)
153 platform_device_unregister(sffsdr_snd_device);
156 module_init(sffsdr_init);
157 module_exit(sffsdr_exit);
159 MODULE_AUTHOR("Hugo Villeneuve");
160 MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
161 MODULE_LICENSE("GPL");