Hugo Villeneuve | 08bd168 | 2008-11-19 01:37:32 -0500 | [diff] [blame^] | 1 | /* |
| 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 | |
| 36 | static 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 | |
| 62 | static struct snd_soc_ops sffsdr_ops = { |
| 63 | .hw_params = sffsdr_hw_params, |
| 64 | }; |
| 65 | |
| 66 | /* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */ |
| 67 | static 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 */ |
| 76 | static 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 */ |
| 83 | static 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 */ |
| 91 | static 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 | |
| 98 | static 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 | |
| 106 | static 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 | |
| 111 | static struct platform_device *sffsdr_snd_device; |
| 112 | |
| 113 | static 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 | |
| 141 | error: |
| 142 | platform_device_put(sffsdr_snd_device); |
| 143 | return ret; |
| 144 | } |
| 145 | |
| 146 | static void __exit sffsdr_exit(void) |
| 147 | { |
| 148 | platform_device_unregister(sffsdr_snd_device); |
| 149 | } |
| 150 | |
| 151 | module_init(sffsdr_init); |
| 152 | module_exit(sffsdr_exit); |
| 153 | |
| 154 | MODULE_AUTHOR("Hugo Villeneuve"); |
| 155 | MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver"); |
| 156 | MODULE_LICENSE("GPL"); |