1 /* 2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. 3 * 4 * Author: Nicolas Pitre 5 * Created: Dec 02, 2004 6 * Copyright: MontaVista Software Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/init.h> 14 #include <linux/io.h> 15 #include <linux/module.h> 16 #include <linux/platform_device.h> 17 #include <linux/dmaengine.h> 18 19 #include <sound/core.h> 20 #include <sound/ac97_codec.h> 21 #include <sound/soc.h> 22 #include <sound/pxa2xx-lib.h> 23 #include <sound/dmaengine_pcm.h> 24 25 #include <mach/hardware.h> 26 #include <mach/regs-ac97.h> 27 #include <mach/audio.h> 28 29 #include "pxa2xx-ac97.h" 30 31 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97) 32 { 33 pxa2xx_ac97_try_warm_reset(ac97); 34 35 pxa2xx_ac97_finish_reset(ac97); 36 } 37 38 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97) 39 { 40 pxa2xx_ac97_try_cold_reset(ac97); 41 42 pxa2xx_ac97_finish_reset(ac97); 43 } 44 45 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 46 .read = pxa2xx_ac97_read, 47 .write = pxa2xx_ac97_write, 48 .warm_reset = pxa2xx_ac97_warm_reset, 49 .reset = pxa2xx_ac97_cold_reset, 50 }; 51 52 static unsigned long pxa2xx_ac97_pcm_stereo_in_req = 12; 53 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = { 54 .addr = __PREG(PCDR), 55 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 56 .maxburst = 32, 57 .filter_data = &pxa2xx_ac97_pcm_stereo_in_req, 58 }; 59 60 static unsigned long pxa2xx_ac97_pcm_stereo_out_req = 11; 61 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = { 62 .addr = __PREG(PCDR), 63 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 64 .maxburst = 32, 65 .filter_data = &pxa2xx_ac97_pcm_stereo_out_req, 66 }; 67 68 static unsigned long pxa2xx_ac97_pcm_aux_mono_out_req = 10; 69 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = { 70 .addr = __PREG(MODR), 71 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 72 .maxburst = 16, 73 .filter_data = &pxa2xx_ac97_pcm_aux_mono_out_req, 74 }; 75 76 static unsigned long pxa2xx_ac97_pcm_aux_mono_in_req = 9; 77 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = { 78 .addr = __PREG(MODR), 79 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 80 .maxburst = 16, 81 .filter_data = &pxa2xx_ac97_pcm_aux_mono_in_req, 82 }; 83 84 static unsigned long pxa2xx_ac97_pcm_aux_mic_mono_req = 8; 85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = { 86 .addr = __PREG(MCDR), 87 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 88 .maxburst = 16, 89 .filter_data = &pxa2xx_ac97_pcm_aux_mic_mono_req, 90 }; 91 92 #ifdef CONFIG_PM 93 static int pxa2xx_ac97_suspend(struct snd_soc_dai *dai) 94 { 95 return pxa2xx_ac97_hw_suspend(); 96 } 97 98 static int pxa2xx_ac97_resume(struct snd_soc_dai *dai) 99 { 100 return pxa2xx_ac97_hw_resume(); 101 } 102 103 #else 104 #define pxa2xx_ac97_suspend NULL 105 #define pxa2xx_ac97_resume NULL 106 #endif 107 108 static int pxa2xx_ac97_probe(struct snd_soc_dai *dai) 109 { 110 return pxa2xx_ac97_hw_probe(to_platform_device(dai->dev)); 111 } 112 113 static int pxa2xx_ac97_remove(struct snd_soc_dai *dai) 114 { 115 pxa2xx_ac97_hw_remove(to_platform_device(dai->dev)); 116 return 0; 117 } 118 119 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream, 120 struct snd_pcm_hw_params *params, 121 struct snd_soc_dai *cpu_dai) 122 { 123 struct snd_dmaengine_dai_dma_data *dma_data; 124 125 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 126 dma_data = &pxa2xx_ac97_pcm_stereo_out; 127 else 128 dma_data = &pxa2xx_ac97_pcm_stereo_in; 129 130 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 131 132 return 0; 133 } 134 135 static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream, 136 struct snd_pcm_hw_params *params, 137 struct snd_soc_dai *cpu_dai) 138 { 139 struct snd_dmaengine_dai_dma_data *dma_data; 140 141 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 142 dma_data = &pxa2xx_ac97_pcm_aux_mono_out; 143 else 144 dma_data = &pxa2xx_ac97_pcm_aux_mono_in; 145 146 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 147 148 return 0; 149 } 150 151 static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream, 152 struct snd_pcm_hw_params *params, 153 struct snd_soc_dai *cpu_dai) 154 { 155 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 156 return -ENODEV; 157 else 158 snd_soc_dai_set_dma_data(cpu_dai, substream, 159 &pxa2xx_ac97_pcm_mic_mono_in); 160 161 return 0; 162 } 163 164 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 165 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ 166 SNDRV_PCM_RATE_48000) 167 168 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = { 169 .hw_params = pxa2xx_ac97_hw_params, 170 }; 171 172 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = { 173 .hw_params = pxa2xx_ac97_hw_aux_params, 174 }; 175 176 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = { 177 .hw_params = pxa2xx_ac97_hw_mic_params, 178 }; 179 180 /* 181 * There is only 1 physical AC97 interface for pxa2xx, but it 182 * has extra fifo's that can be used for aux DACs and ADCs. 183 */ 184 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = { 185 { 186 .name = "pxa2xx-ac97", 187 .ac97_control = 1, 188 .probe = pxa2xx_ac97_probe, 189 .remove = pxa2xx_ac97_remove, 190 .suspend = pxa2xx_ac97_suspend, 191 .resume = pxa2xx_ac97_resume, 192 .playback = { 193 .stream_name = "AC97 Playback", 194 .channels_min = 2, 195 .channels_max = 2, 196 .rates = PXA2XX_AC97_RATES, 197 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 198 .capture = { 199 .stream_name = "AC97 Capture", 200 .channels_min = 2, 201 .channels_max = 2, 202 .rates = PXA2XX_AC97_RATES, 203 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 204 .ops = &pxa_ac97_hifi_dai_ops, 205 }, 206 { 207 .name = "pxa2xx-ac97-aux", 208 .ac97_control = 1, 209 .playback = { 210 .stream_name = "AC97 Aux Playback", 211 .channels_min = 1, 212 .channels_max = 1, 213 .rates = PXA2XX_AC97_RATES, 214 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 215 .capture = { 216 .stream_name = "AC97 Aux Capture", 217 .channels_min = 1, 218 .channels_max = 1, 219 .rates = PXA2XX_AC97_RATES, 220 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 221 .ops = &pxa_ac97_aux_dai_ops, 222 }, 223 { 224 .name = "pxa2xx-ac97-mic", 225 .ac97_control = 1, 226 .capture = { 227 .stream_name = "AC97 Mic Capture", 228 .channels_min = 1, 229 .channels_max = 1, 230 .rates = PXA2XX_AC97_RATES, 231 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 232 .ops = &pxa_ac97_mic_dai_ops, 233 }, 234 }; 235 236 static const struct snd_soc_component_driver pxa_ac97_component = { 237 .name = "pxa-ac97", 238 }; 239 240 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev) 241 { 242 int ret; 243 244 if (pdev->id != -1) { 245 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n"); 246 return -ENXIO; 247 } 248 249 ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops); 250 if (ret != 0) 251 return ret; 252 253 /* Punt most of the init to the SoC probe; we may need the machine 254 * driver to do interesting things with the clocking to get us up 255 * and running. 256 */ 257 return snd_soc_register_component(&pdev->dev, &pxa_ac97_component, 258 pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver)); 259 } 260 261 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev) 262 { 263 snd_soc_unregister_component(&pdev->dev); 264 snd_soc_set_ac97_ops(NULL); 265 return 0; 266 } 267 268 static struct platform_driver pxa2xx_ac97_driver = { 269 .probe = pxa2xx_ac97_dev_probe, 270 .remove = pxa2xx_ac97_dev_remove, 271 .driver = { 272 .name = "pxa2xx-ac97", 273 .owner = THIS_MODULE, 274 }, 275 }; 276 277 module_platform_driver(pxa2xx_ac97_driver); 278 279 MODULE_AUTHOR("Nicolas Pitre"); 280 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 281 MODULE_LICENSE("GPL"); 282