Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 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/init.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/clk.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/gpio.h> |
| 22 | #include <linux/io.h> |
| 23 | |
| 24 | #include <sound/core.h> |
| 25 | #include <sound/pcm.h> |
| 26 | #include <sound/pcm_params.h> |
| 27 | #include <sound/initval.h> |
| 28 | #include <sound/soc.h> |
| 29 | |
| 30 | #include <plat/regs-s3c2412-iis.h> |
| 31 | #include <plat/gpio-bank-d.h> |
| 32 | #include <plat/gpio-bank-e.h> |
| 33 | #include <plat/gpio-cfg.h> |
| 34 | #include <plat/audio.h> |
| 35 | |
| 36 | #include <mach/map.h> |
| 37 | #include <mach/dma.h> |
| 38 | |
| 39 | #include "s3c24xx-pcm.h" |
| 40 | #include "s3c64xx-i2s.h" |
| 41 | |
| 42 | static struct s3c2410_dma_client s3c64xx_dma_client_out = { |
| 43 | .name = "I2S PCM Stereo out" |
| 44 | }; |
| 45 | |
| 46 | static struct s3c2410_dma_client s3c64xx_dma_client_in = { |
| 47 | .name = "I2S PCM Stereo in" |
| 48 | }; |
| 49 | |
| 50 | static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = { |
| 51 | [0] = { |
| 52 | .channel = DMACH_I2S0_OUT, |
| 53 | .client = &s3c64xx_dma_client_out, |
| 54 | .dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD, |
| 55 | .dma_size = 4, |
| 56 | }, |
| 57 | [1] = { |
| 58 | .channel = DMACH_I2S1_OUT, |
| 59 | .client = &s3c64xx_dma_client_out, |
| 60 | .dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD, |
| 61 | .dma_size = 4, |
| 62 | }, |
| 63 | }; |
| 64 | |
| 65 | static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = { |
| 66 | [0] = { |
| 67 | .channel = DMACH_I2S0_IN, |
| 68 | .client = &s3c64xx_dma_client_in, |
| 69 | .dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD, |
| 70 | .dma_size = 4, |
| 71 | }, |
| 72 | [1] = { |
| 73 | .channel = DMACH_I2S1_IN, |
| 74 | .client = &s3c64xx_dma_client_in, |
| 75 | .dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD, |
| 76 | .dma_size = 4, |
| 77 | }, |
| 78 | }; |
| 79 | |
| 80 | static struct s3c_i2sv2_info s3c64xx_i2s[2]; |
| 81 | |
| 82 | static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai) |
| 83 | { |
| 84 | return cpu_dai->private_data; |
| 85 | } |
| 86 | |
| 87 | static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, |
| 88 | int clk_id, unsigned int freq, int dir) |
| 89 | { |
| 90 | struct s3c_i2sv2_info *i2s = to_info(cpu_dai); |
| 91 | u32 iismod = readl(i2s->regs + S3C2412_IISMOD); |
| 92 | |
| 93 | switch (clk_id) { |
| 94 | case S3C64XX_CLKSRC_PCLK: |
| 95 | iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX; |
| 96 | break; |
| 97 | |
| 98 | case S3C64XX_CLKSRC_MUX: |
| 99 | iismod |= S3C64XX_IISMOD_IMS_SYSMUX; |
| 100 | break; |
| 101 | |
| 102 | default: |
| 103 | return -EINVAL; |
| 104 | } |
| 105 | |
| 106 | writel(iismod, i2s->regs + S3C2412_IISMOD); |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai) |
| 113 | { |
| 114 | struct s3c_i2sv2_info *i2s = to_info(dai); |
| 115 | |
| 116 | return clk_get_rate(i2s->iis_cclk); |
| 117 | } |
| 118 | EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate); |
| 119 | |
| 120 | static int s3c64xx_i2s_probe(struct platform_device *pdev, |
| 121 | struct snd_soc_dai *dai) |
| 122 | { |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 123 | /* configure GPIO for i2s port */ |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 124 | switch (dai->id) { |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 125 | case 0: |
| 126 | s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK); |
| 127 | s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK); |
| 128 | s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK); |
| 129 | s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI); |
| 130 | s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0); |
| 131 | break; |
| 132 | case 1: |
| 133 | s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK); |
| 134 | s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK); |
| 135 | s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK); |
| 136 | s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI); |
| 137 | s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0); |
| 138 | } |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | |
| 144 | #define S3C64XX_I2S_RATES \ |
| 145 | (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ |
| 146 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ |
| 147 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) |
| 148 | |
| 149 | #define S3C64XX_I2S_FMTS \ |
| 150 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE) |
| 151 | |
Mark Brown | f2a5d6a | 2009-03-16 14:02:07 +0000 | [diff] [blame] | 152 | static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = { |
| 153 | .set_sysclk = s3c64xx_i2s_set_sysclk, |
| 154 | }; |
| 155 | |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 156 | struct snd_soc_dai s3c64xx_i2s_dai[] = { |
| 157 | { |
| 158 | .name = "s3c64xx-i2s", |
| 159 | .id = 0, |
| 160 | .probe = s3c64xx_i2s_probe, |
| 161 | .playback = { |
| 162 | .channels_min = 2, |
| 163 | .channels_max = 2, |
| 164 | .rates = S3C64XX_I2S_RATES, |
| 165 | .formats = S3C64XX_I2S_FMTS, |
| 166 | }, |
| 167 | .capture = { |
| 168 | .channels_min = 2, |
| 169 | .channels_max = 2, |
| 170 | .rates = S3C64XX_I2S_RATES, |
| 171 | .formats = S3C64XX_I2S_FMTS, |
| 172 | }, |
| 173 | .ops = &s3c64xx_i2s_dai_ops, |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 174 | }, |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 175 | { |
| 176 | .name = "s3c64xx-i2s", |
| 177 | .id = 1, |
| 178 | .probe = s3c64xx_i2s_probe, |
| 179 | .playback = { |
| 180 | .channels_min = 2, |
| 181 | .channels_max = 2, |
| 182 | .rates = S3C64XX_I2S_RATES, |
| 183 | .formats = S3C64XX_I2S_FMTS, |
| 184 | }, |
| 185 | .capture = { |
| 186 | .channels_min = 2, |
| 187 | .channels_max = 2, |
| 188 | .rates = S3C64XX_I2S_RATES, |
| 189 | .formats = S3C64XX_I2S_FMTS, |
| 190 | }, |
| 191 | .ops = &s3c64xx_i2s_dai_ops, |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 192 | }, |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 193 | }; |
| 194 | EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai); |
| 195 | |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 196 | static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev) |
| 197 | { |
| 198 | struct s3c_i2sv2_info *i2s; |
| 199 | struct snd_soc_dai *dai; |
| 200 | int ret; |
| 201 | |
| 202 | if (pdev->id >= ARRAY_SIZE(s3c64xx_i2s)) { |
| 203 | dev_err(&pdev->dev, "id %d out of range\n", pdev->id); |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | i2s = &s3c64xx_i2s[pdev->id]; |
| 208 | dai = &s3c64xx_i2s_dai[pdev->id]; |
| 209 | dai->dev = &pdev->dev; |
| 210 | |
| 211 | i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id]; |
| 212 | i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id]; |
| 213 | |
| 214 | i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus"); |
| 215 | if (IS_ERR(i2s->iis_cclk)) { |
| 216 | dev_err(&pdev->dev, "failed to get audio-bus"); |
| 217 | ret = PTR_ERR(i2s->iis_cclk); |
| 218 | goto err; |
| 219 | } |
| 220 | |
| 221 | ret = s3c_i2sv2_probe(pdev, dai, i2s, |
| 222 | dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0); |
| 223 | if (ret) |
| 224 | goto err_clk; |
| 225 | |
| 226 | ret = snd_soc_register_dai(dai); |
| 227 | if (ret != 0) |
| 228 | goto err_i2sv2; |
| 229 | |
| 230 | return 0; |
| 231 | |
| 232 | err_i2sv2: |
| 233 | /* Not implemented for I2Sv2 core yet */ |
| 234 | err_clk: |
| 235 | clk_put(i2s->iis_cclk); |
| 236 | err: |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev) |
| 241 | { |
| 242 | dev_err(&pdev->dev, "Device removal not yet supported\n"); |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static struct platform_driver s3c64xx_iis_driver = { |
| 247 | .probe = s3c64xx_iis_dev_probe, |
| 248 | .remove = s3c64xx_iis_dev_remove, |
| 249 | .driver = { |
| 250 | .name = "s3c64xx-iis", |
| 251 | .owner = THIS_MODULE, |
| 252 | }, |
| 253 | }; |
| 254 | |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 255 | static int __init s3c64xx_i2s_init(void) |
| 256 | { |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 257 | return platform_driver_register(&s3c64xx_iis_driver); |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 258 | } |
| 259 | module_init(s3c64xx_i2s_init); |
| 260 | |
| 261 | static void __exit s3c64xx_i2s_exit(void) |
| 262 | { |
Mark Brown | 172fd9e | 2009-04-24 16:33:10 +0100 | [diff] [blame^] | 263 | platform_driver_unregister(&s3c64xx_iis_driver); |
Ben Dooks | f8cf817 | 2009-03-04 00:49:31 +0000 | [diff] [blame] | 264 | } |
| 265 | module_exit(s3c64xx_i2s_exit); |
| 266 | |
| 267 | /* Module information */ |
| 268 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
| 269 | MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); |
| 270 | MODULE_LICENSE("GPL"); |