1/* sound/soc/s3c24xx/s3c64xx-i2s-v4.c 2 * 3 * ALSA SoC Audio Layer - S3C64XX I2Sv4 driver 4 * Copyright (c) 2010 Samsung Electronics Co. Ltd 5 * Author: Jaswinder Singh <jassi.brar@samsung.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/clk.h> 13#include <linux/gpio.h> 14#include <linux/io.h> 15 16#include <sound/soc.h> 17#include <sound/pcm_params.h> 18 19#include <mach/gpio-bank-c.h> 20#include <mach/gpio-bank-h.h> 21#include <plat/gpio-cfg.h> 22 23#include <mach/map.h> 24#include <mach/dma.h> 25 26#include "s3c-dma.h" 27#include "regs-i2s-v2.h" 28#include "s3c64xx-i2s.h" 29 30static struct s3c2410_dma_client s3c64xx_dma_client_out = { 31 .name = "I2Sv4 PCM Stereo out" 32}; 33 34static struct s3c2410_dma_client s3c64xx_dma_client_in = { 35 .name = "I2Sv4 PCM Stereo in" 36}; 37 38static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out; 39static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in; 40static struct s3c_i2sv2_info s3c64xx_i2sv4; 41 42struct snd_soc_dai s3c64xx_i2s_v4_dai; 43EXPORT_SYMBOL_GPL(s3c64xx_i2s_v4_dai); 44 45static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai) 46{ 47 return cpu_dai->private_data; 48} 49 50static int s3c64xx_i2sv4_probe(struct platform_device *pdev, 51 struct snd_soc_dai *dai) 52{ 53 /* configure GPIO for i2s port */ 54 s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_I2S_V40_DO0); 55 s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_I2S_V40_DO1); 56 s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C64XX_GPC7_I2S_V40_DO2); 57 s3c_gpio_cfgpin(S3C64XX_GPH(6), S3C64XX_GPH6_I2S_V40_BCLK); 58 s3c_gpio_cfgpin(S3C64XX_GPH(7), S3C64XX_GPH7_I2S_V40_CDCLK); 59 s3c_gpio_cfgpin(S3C64XX_GPH(8), S3C64XX_GPH8_I2S_V40_LRCLK); 60 s3c_gpio_cfgpin(S3C64XX_GPH(9), S3C64XX_GPH9_I2S_V40_DI); 61 62 return 0; 63} 64 65static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params *params, 67 struct snd_soc_dai *cpu_dai) 68{ 69 struct s3c_i2sv2_info *i2s = to_info(cpu_dai); 70 struct s3c_dma_params *dma_data; 71 u32 iismod; 72 73 dev_dbg(cpu_dai->dev, "Entered %s\n", __func__); 74 75 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 76 dma_data = i2s->dma_playback; 77 else 78 dma_data = i2s->dma_capture; 79 80 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 81 82 iismod = readl(i2s->regs + S3C2412_IISMOD); 83 dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod); 84 85 iismod &= ~S3C64XX_IISMOD_BLC_MASK; 86 switch (params_format(params)) { 87 case SNDRV_PCM_FORMAT_S8: 88 iismod |= S3C64XX_IISMOD_BLC_8BIT; 89 break; 90 case SNDRV_PCM_FORMAT_S16_LE: 91 break; 92 case SNDRV_PCM_FORMAT_S24_LE: 93 iismod |= S3C64XX_IISMOD_BLC_24BIT; 94 break; 95 } 96 97 writel(iismod, i2s->regs + S3C2412_IISMOD); 98 dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod); 99 100 return 0; 101} 102 103static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = { 104 .hw_params = s3c_i2sv4_hw_params, 105}; 106 107static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev) 108{ 109 struct s3c_i2sv2_info *i2s; 110 struct snd_soc_dai *dai; 111 int ret; 112 113 i2s = &s3c64xx_i2sv4; 114 dai = &s3c64xx_i2s_v4_dai; 115 116 if (dai->dev) { 117 dev_dbg(dai->dev, "%s: \ 118 I2Sv4 instance already registered!\n", __func__); 119 return -EBUSY; 120 } 121 122 dai->dev = &pdev->dev; 123 dai->name = "s3c64xx-i2s-v4"; 124 dai->id = 0; 125 dai->symmetric_rates = 1; 126 dai->playback.channels_min = 2; 127 dai->playback.channels_max = 2; 128 dai->playback.rates = S3C64XX_I2S_RATES; 129 dai->playback.formats = S3C64XX_I2S_FMTS; 130 dai->capture.channels_min = 2; 131 dai->capture.channels_max = 2; 132 dai->capture.rates = S3C64XX_I2S_RATES; 133 dai->capture.formats = S3C64XX_I2S_FMTS; 134 dai->probe = s3c64xx_i2sv4_probe; 135 dai->ops = &s3c64xx_i2sv4_dai_ops; 136 137 i2s->feature |= S3C_FEATURE_CDCLKCON; 138 139 i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in; 140 i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out; 141 142 i2s->dma_capture->channel = DMACH_HSI_I2SV40_RX; 143 i2s->dma_capture->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISRXD; 144 i2s->dma_playback->channel = DMACH_HSI_I2SV40_TX; 145 i2s->dma_playback->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISTXD; 146 147 i2s->dma_capture->client = &s3c64xx_dma_client_in; 148 i2s->dma_capture->dma_size = 4; 149 i2s->dma_playback->client = &s3c64xx_dma_client_out; 150 i2s->dma_playback->dma_size = 4; 151 152 i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus"); 153 if (IS_ERR(i2s->iis_cclk)) { 154 dev_err(&pdev->dev, "failed to get audio-bus\n"); 155 ret = PTR_ERR(i2s->iis_cclk); 156 goto err; 157 } 158 159 clk_enable(i2s->iis_cclk); 160 161 ret = s3c_i2sv2_probe(pdev, dai, i2s, 0); 162 if (ret) 163 goto err_clk; 164 165 ret = s3c_i2sv2_register_dai(dai); 166 if (ret != 0) 167 goto err_i2sv2; 168 169 return 0; 170 171err_i2sv2: 172 /* Not implemented for I2Sv2 core yet */ 173err_clk: 174 clk_put(i2s->iis_cclk); 175err: 176 return ret; 177} 178 179static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev) 180{ 181 dev_err(&pdev->dev, "Device removal not yet supported\n"); 182 return 0; 183} 184 185static struct platform_driver s3c64xx_i2sv4_driver = { 186 .probe = s3c64xx_i2sv4_dev_probe, 187 .remove = s3c64xx_i2sv4_dev_remove, 188 .driver = { 189 .name = "s3c64xx-iis-v4", 190 .owner = THIS_MODULE, 191 }, 192}; 193 194static int __init s3c64xx_i2sv4_init(void) 195{ 196 return platform_driver_register(&s3c64xx_i2sv4_driver); 197} 198module_init(s3c64xx_i2sv4_init); 199 200static void __exit s3c64xx_i2sv4_exit(void) 201{ 202 platform_driver_unregister(&s3c64xx_i2sv4_driver); 203} 204module_exit(s3c64xx_i2sv4_exit); 205 206/* Module information */ 207MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); 208MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface"); 209MODULE_LICENSE("GPL"); 210