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| 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/module.h> | |
| 16 #include <linux/clk.h> | |
| 17 #include <linux/gpio.h> | |
| 18 #include <linux/io.h> | |
| 19 #include <linux/slab.h> | |
| 20 | |
| 21 #include <sound/soc.h> | |
| 22 | |
| 23 #include <plat/audio.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 | |
| 37 static struct s3c2410_dma_client s3c64xx_dma_client_out = { | |
| 38 .name = "I2S PCM Stereo out" | |
| 39 }; | |
| 40 | |
| 41 static struct s3c2410_dma_client s3c64xx_dma_client_in = { | |
| 42 .name = "I2S PCM Stereo in" | |
| 43 }; | |
| 44 | |
| 45 static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3]; | |
| 46 static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3]; | |
| 47 static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3]; | |
| 48 | |
| 49 struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai) | |
| 50 { | |
| 51 struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai); | |
| 52 u32 iismod = readl(i2s->regs + S3C2412_IISMOD); | |
| 53 | |
| 54 if (iismod & S3C2412_IISMOD_IMS_SYSMUX) | |
| 55 return i2s->iis_cclk; | |
| 56 else | |
| 57 return i2s->iis_pclk; | |
| 58 } | |
| 59 EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock); | |
| 60 | |
| 61 static int s3c64xx_i2s_probe(struct snd_soc_dai *dai) | |
| 62 { | |
| 63 struct s3c_i2sv2_info *i2s; | |
| 64 int ret; | |
| 65 | |
| 66 if (dai->id >= MAX_I2SV3) { | |
| 67 dev_err(dai->dev, "id %d out of range\n", dai->id); | |
| 68 return -EINVAL; | |
| 69 } | |
| 70 | |
| 71 i2s = &s3c64xx_i2s[dai->id]; | |
| 72 snd_soc_dai_set_drvdata(dai, i2s); | |
| 73 | |
| 74 i2s->iis_cclk = clk_get(dai->dev, "audio-bus"); | |
| 75 if (IS_ERR(i2s->iis_cclk)) { | |
| 76 dev_err(dai->dev, "failed to get audio-bus\n"); | |
| 77 ret = PTR_ERR(i2s->iis_cclk); | |
| 78 goto err; | |
| 79 } | |
| 80 | |
| 81 clk_enable(i2s->iis_cclk); | |
| 82 | |
| 83 ret = s3c_i2sv2_probe(dai, i2s, i2s->base); | |
| 84 if (ret) | |
| 85 goto err_clk; | |
| 86 | |
| 87 return 0; | |
| 88 | |
| 89 err_clk: | |
| 90 clk_disable(i2s->iis_cclk); | |
| 91 clk_put(i2s->iis_cclk); | |
| 92 err: | |
| 93 kfree(i2s); | |
| 94 return ret; | |
| 95 } | |
| 96 | |
| 97 static int s3c64xx_i2s_remove(struct snd_soc_dai *dai) | |
| 98 { | |
| 99 struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai); | |
| 100 | |
| 101 clk_disable(i2s->iis_cclk); | |
| 102 clk_put(i2s->iis_cclk); | |
| 103 kfree(i2s); | |
| 104 return 0; | |
| 105 } | |
| 106 | |
| 107 static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops; | |
| 108 | |
| 109 static struct snd_soc_dai_driver s3c64xx_i2s_dai[MAX_I2SV3] = { | |
| 110 { | |
| 111 .name = "s3c64xx-i2s-0", | |
| 112 .probe = s3c64xx_i2s_probe, | |
| 113 .remove = s3c64xx_i2s_remove, | |
| 114 .playback = { | |
| 115 .channels_min = 2, | |
| 116 .channels_max = 2, | |
| 117 .rates = S3C64XX_I2S_RATES, | |
| 118 .formats = S3C64XX_I2S_FMTS,}, | |
| 119 .capture = { | |
| 120 .channels_min = 2, | |
| 121 .channels_max = 2, | |
| 122 .rates = S3C64XX_I2S_RATES, | |
| 123 .formats = S3C64XX_I2S_FMTS,}, | |
| 124 .ops = &s3c64xx_i2s_dai_ops, | |
| 125 .symmetric_rates = 1, | |
| 126 }, { | |
| 127 .name = "s3c64xx-i2s-1", | |
| 128 .probe = s3c64xx_i2s_probe, | |
| 129 .remove = s3c64xx_i2s_remove, | |
| 130 .playback = { | |
| 131 .channels_min = 2, | |
| 132 .channels_max = 2, | |
| 133 .rates = S3C64XX_I2S_RATES, | |
| 134 .formats = S3C64XX_I2S_FMTS,}, | |
| 135 .capture = { | |
| 136 .channels_min = 2, | |
| 137 .channels_max = 2, | |
| 138 .rates = S3C64XX_I2S_RATES, | |
| 139 .formats = S3C64XX_I2S_FMTS,}, | |
| 140 .ops = &s3c64xx_i2s_dai_ops, | |
| 141 .symmetric_rates = 1, | |
| 142 },}; | |
| 143 | |
| 144 static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev) | |
| 145 { | |
| 146 struct s3c_audio_pdata *i2s_pdata; | |
| 147 struct s3c_i2sv2_info *i2s; | |
| 148 struct resource *res; | |
| 149 int i, ret; | |
| 150 | |
| 151 if (pdev->id >= MAX_I2SV3) { | |
| 152 dev_err(&pdev->dev, "id %d out of range\n", pdev->id); | |
| 153 return -EINVAL; | |
| 154 } | |
| 155 | |
| 156 i2s = &s3c64xx_i2s[pdev->id]; | |
| 157 | |
| 158 i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id]; | |
| 159 i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id]; | |
| 160 | |
| 161 res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
| 162 if (!res) { | |
| 163 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n"); | |
| 164 return -ENXIO; | |
| 165 } | |
| 166 i2s->dma_playback->channel = res->start; | |
| 167 | |
| 168 res = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
| 169 if (!res) { | |
| 170 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n"); | |
| 171 return -ENXIO; | |
| 172 } | |
| 173 i2s->dma_capture->channel = res->start; | |
| 174 | |
| 175 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 176 if (!res) { | |
| 177 dev_err(&pdev->dev, "Unable to get I2S SFR address\n"); | |
| 178 return -ENXIO; | |
| 179 } | |
| 180 | |
| 181 if (!request_mem_region(res->start, resource_size(res), | |
| 182 "s3c64xx-i2s")) { | |
| 183 dev_err(&pdev->dev, "Unable to request SFR region\n"); | |
| 184 return -EBUSY; | |
| 185 } | |
| 186 i2s->base = res->start; | |
| 187 | |
| 188 i2s_pdata = pdev->dev.platform_data; | |
| 189 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) { | |
| 190 dev_err(&pdev->dev, "Unable to configure gpio\n"); | |
| 191 return -EINVAL; | |
| 192 } | |
| 193 i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD; | |
| 194 i2s->dma_playback->dma_addr = res->start + S3C2412_IISTXD; | |
| 195 | |
| 196 i2s->dma_capture->client = &s3c64xx_dma_client_in; | |
| 197 i2s->dma_capture->dma_size = 4; | |
| 198 i2s->dma_playback->client = &s3c64xx_dma_client_out; | |
| 199 i2s->dma_playback->dma_size = 4; | |
| 200 | |
| 201 for (i = 0; i < ARRAY_SIZE(s3c64xx_i2s_dai); i++) { | |
| 202 ret = s3c_i2sv2_register_dai(&pdev->dev, i, | |
| 203 &s3c64xx_i2s_dai[i]); | |
| 204 if (ret != 0) | |
| 205 return ret; | |
| 206 } | |
| 207 | |
| 208 return 0; | |
| 209 } | |
| 210 | |
| 211 static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev) | |
| 212 { | |
| 213 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(s3c64xx_i2s_dai)); | |
| 214 return 0; | |
| 215 } | |
| 216 | |
| 217 static struct platform_driver s3c64xx_iis_driver = { | |
| 218 .probe = s3c64xx_iis_dev_probe, | |
| 219 .remove = s3c64xx_iis_dev_remove, | |
| 220 .driver = { | |
| 221 .name = "s3c64xx-iis", | |
| 222 .owner = THIS_MODULE, | |
| 223 }, | |
| 224 }; | |
| 225 | |
| 226 static int __init s3c64xx_i2s_init(void) | |
| 227 { | |
| 228 return platform_driver_register(&s3c64xx_iis_driver); | |
| 229 } | |
| 230 module_init(s3c64xx_i2s_init); | |
| 231 | |
| 232 static void __exit s3c64xx_i2s_exit(void) | |
| 233 { | |
| 234 platform_driver_unregister(&s3c64xx_iis_driver); | |
| 235 } | |
| 236 module_exit(s3c64xx_i2s_exit); | |
| 237 | |
| 238 /* Module information */ | |
| 239 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
| 240 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); | |
| 241 MODULE_LICENSE("GPL"); | |
| 242 MODULE_ALIAS("platform:s3c64xx-iis"); | |
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Chromium Code Reviews
Issue 6577007:
CHROMIUM: ASoC: Import entire upstream ASoC tree (Closed)
