1/* sound/soc/s3c24xx/s3c64xx-i2s.c 2 * 3 * ALSA SoC Audio Layer - S3C64XX I2S driver 4 * 5 * Copyright 2008 Openmoko, Inc. 6 * Copyright 2008 Simtec Electronics 7 * Ben Dooks <ben@simtec.co.uk> 8 * http://armlinux.simtec.co.uk/ 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/clk.h> 16#include <linux/gpio.h> 17#include <linux/io.h> 18 19#include <sound/soc.h> 20 21#include <mach/gpio-bank-d.h> 22#include <mach/gpio-bank-e.h> 23#include <plat/gpio-cfg.h> 24 25#include <mach/map.h> 26#include <mach/dma.h> 27 28#include "s3c-dma.h" 29#include "regs-i2s-v2.h" 30#include "s3c64xx-i2s.h" 31 32/* The value should be set to maximum of the total number 33 * of I2Sv3 controllers that any supported SoC has. 34 */ 35#define MAX_I2SV3 2 36 37static struct s3c2410_dma_client s3c64xx_dma_client_out = { 38 .name = "I2S PCM Stereo out" 39}; 40 41static struct s3c2410_dma_client s3c64xx_dma_client_in = { 42 .name = "I2S PCM Stereo in" 43}; 44 45static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3]; 46static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3]; 47static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3]; 48 49struct snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3]; 50EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai); 51 52static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai) 53{ 54 return cpu_dai->private_data; 55} 56 57static int s3c64xx_i2s_probe(struct platform_device *pdev, 58 struct snd_soc_dai *dai) 59{ 60 /* configure GPIO for i2s port */ 61 switch (dai->id) { 62 case 0: 63 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK); 64 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK); 65 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK); 66 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI); 67 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0); 68 break; 69 case 1: 70 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK); 71 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK); 72 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK); 73 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI); 74 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0); 75 } 76 77 return 0; 78} 79 80 81static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops; 82 83static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev) 84{ 85 struct s3c_i2sv2_info *i2s; 86 struct snd_soc_dai *dai; 87 int ret; 88 89 if (pdev->id >= MAX_I2SV3) { 90 dev_err(&pdev->dev, "id %d out of range\n", pdev->id); 91 return -EINVAL; 92 } 93 94 i2s = &s3c64xx_i2s[pdev->id]; 95 dai = &s3c64xx_i2s_dai[pdev->id]; 96 dai->dev = &pdev->dev; 97 dai->name = "s3c64xx-i2s"; 98 dai->id = pdev->id; 99 dai->symmetric_rates = 1; 100 dai->playback.channels_min = 2; 101 dai->playback.channels_max = 2; 102 dai->playback.rates = S3C64XX_I2S_RATES; 103 dai->playback.formats = S3C64XX_I2S_FMTS; 104 dai->capture.channels_min = 2; 105 dai->capture.channels_max = 2; 106 dai->capture.rates = S3C64XX_I2S_RATES; 107 dai->capture.formats = S3C64XX_I2S_FMTS; 108 dai->probe = s3c64xx_i2s_probe; 109 dai->ops = &s3c64xx_i2s_dai_ops; 110 111 i2s->feature |= S3C_FEATURE_CDCLKCON; 112 113 i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id]; 114 i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id]; 115 116 if (pdev->id == 0) { 117 i2s->dma_capture->channel = DMACH_I2S0_IN; 118 i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD; 119 i2s->dma_playback->channel = DMACH_I2S0_OUT; 120 i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD; 121 } else { 122 i2s->dma_capture->channel = DMACH_I2S1_IN; 123 i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD; 124 i2s->dma_playback->channel = DMACH_I2S1_OUT; 125 i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD; 126 } 127 128 i2s->dma_capture->client = &s3c64xx_dma_client_in; 129 i2s->dma_capture->dma_size = 4; 130 i2s->dma_playback->client = &s3c64xx_dma_client_out; 131 i2s->dma_playback->dma_size = 4; 132 133 i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus"); 134 if (IS_ERR(i2s->iis_cclk)) { 135 dev_err(&pdev->dev, "failed to get audio-bus\n"); 136 ret = PTR_ERR(i2s->iis_cclk); 137 goto err; 138 } 139 140 clk_enable(i2s->iis_cclk); 141 142 ret = s3c_i2sv2_probe(pdev, dai, i2s, 0); 143 if (ret) 144 goto err_clk; 145 146 ret = s3c_i2sv2_register_dai(dai); 147 if (ret != 0) 148 goto err_i2sv2; 149 150 return 0; 151 152err_i2sv2: 153 /* Not implemented for I2Sv2 core yet */ 154err_clk: 155 clk_put(i2s->iis_cclk); 156err: 157 return ret; 158} 159 160static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev) 161{ 162 dev_err(&pdev->dev, "Device removal not yet supported\n"); 163 return 0; 164} 165 166static struct platform_driver s3c64xx_iis_driver = { 167 .probe = s3c64xx_iis_dev_probe, 168 .remove = s3c64xx_iis_dev_remove, 169 .driver = { 170 .name = "s3c64xx-iis", 171 .owner = THIS_MODULE, 172 }, 173}; 174 175static int __init s3c64xx_i2s_init(void) 176{ 177 return platform_driver_register(&s3c64xx_iis_driver); 178} 179module_init(s3c64xx_i2s_init); 180 181static void __exit s3c64xx_i2s_exit(void) 182{ 183 platform_driver_unregister(&s3c64xx_iis_driver); 184} 185module_exit(s3c64xx_i2s_exit); 186 187/* Module information */ 188MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); 189MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); 190MODULE_LICENSE("GPL"); 191