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 #include <linux/dma/pxa-dma.h> 19 20 #include <sound/core.h> 21 #include <sound/ac97_codec.h> 22 #include <sound/soc.h> 23 #include <sound/pxa2xx-lib.h> 24 #include <sound/dmaengine_pcm.h> 25 26 #include <mach/hardware.h> 27 #include <mach/regs-ac97.h> 28 #include <mach/audio.h> 29 30 #include "pxa2xx-ac97.h" 31 32 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97) 33 { 34 pxa2xx_ac97_try_warm_reset(ac97); 35 36 pxa2xx_ac97_finish_reset(ac97); 37 } 38 39 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97) 40 { 41 pxa2xx_ac97_try_cold_reset(ac97); 42 43 pxa2xx_ac97_finish_reset(ac97); 44 } 45 46 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 47 .read = pxa2xx_ac97_read, 48 .write = pxa2xx_ac97_write, 49 .warm_reset = pxa2xx_ac97_warm_reset, 50 .reset = pxa2xx_ac97_cold_reset, 51 }; 52 53 static struct pxad_param pxa2xx_ac97_pcm_stereo_in_req = { 54 .prio = PXAD_PRIO_LOWEST, 55 .drcmr = 11, 56 }; 57 58 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = { 59 .addr = __PREG(PCDR), 60 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 61 .maxburst = 32, 62 .filter_data = &pxa2xx_ac97_pcm_stereo_in_req, 63 }; 64 65 static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = { 66 .prio = PXAD_PRIO_LOWEST, 67 .drcmr = 12, 68 }; 69 70 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = { 71 .addr = __PREG(PCDR), 72 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 73 .maxburst = 32, 74 .filter_data = &pxa2xx_ac97_pcm_stereo_out_req, 75 }; 76 77 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = { 78 .prio = PXAD_PRIO_LOWEST, 79 .drcmr = 10, 80 }; 81 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = { 82 .addr = __PREG(MODR), 83 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 84 .maxburst = 16, 85 .filter_data = &pxa2xx_ac97_pcm_aux_mono_out_req, 86 }; 87 88 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = { 89 .prio = PXAD_PRIO_LOWEST, 90 .drcmr = 9, 91 }; 92 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = { 93 .addr = __PREG(MODR), 94 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 95 .maxburst = 16, 96 .filter_data = &pxa2xx_ac97_pcm_aux_mono_in_req, 97 }; 98 99 static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = { 100 .prio = PXAD_PRIO_LOWEST, 101 .drcmr = 8, 102 }; 103 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = { 104 .addr = __PREG(MCDR), 105 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 106 .maxburst = 16, 107 .filter_data = &pxa2xx_ac97_pcm_aux_mic_mono_req, 108 }; 109 110 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream, 111 struct snd_soc_dai *cpu_dai) 112 { 113 struct snd_dmaengine_dai_dma_data *dma_data; 114 115 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 116 dma_data = &pxa2xx_ac97_pcm_stereo_out; 117 else 118 dma_data = &pxa2xx_ac97_pcm_stereo_in; 119 120 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 121 122 return 0; 123 } 124 125 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream, 126 struct snd_soc_dai *cpu_dai) 127 { 128 struct snd_dmaengine_dai_dma_data *dma_data; 129 130 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 131 dma_data = &pxa2xx_ac97_pcm_aux_mono_out; 132 else 133 dma_data = &pxa2xx_ac97_pcm_aux_mono_in; 134 135 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 136 137 return 0; 138 } 139 140 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream, 141 struct snd_soc_dai *cpu_dai) 142 { 143 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 144 return -ENODEV; 145 else 146 snd_soc_dai_set_dma_data(cpu_dai, substream, 147 &pxa2xx_ac97_pcm_mic_mono_in); 148 149 return 0; 150 } 151 152 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 153 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ 154 SNDRV_PCM_RATE_48000) 155 156 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = { 157 .startup = pxa2xx_ac97_hifi_startup, 158 }; 159 160 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = { 161 .startup = pxa2xx_ac97_aux_startup, 162 }; 163 164 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = { 165 .startup = pxa2xx_ac97_mic_startup, 166 }; 167 168 /* 169 * There is only 1 physical AC97 interface for pxa2xx, but it 170 * has extra fifo's that can be used for aux DACs and ADCs. 171 */ 172 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = { 173 { 174 .name = "pxa2xx-ac97", 175 .bus_control = true, 176 .playback = { 177 .stream_name = "AC97 Playback", 178 .channels_min = 2, 179 .channels_max = 2, 180 .rates = PXA2XX_AC97_RATES, 181 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 182 .capture = { 183 .stream_name = "AC97 Capture", 184 .channels_min = 2, 185 .channels_max = 2, 186 .rates = PXA2XX_AC97_RATES, 187 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 188 .ops = &pxa_ac97_hifi_dai_ops, 189 }, 190 { 191 .name = "pxa2xx-ac97-aux", 192 .bus_control = true, 193 .playback = { 194 .stream_name = "AC97 Aux Playback", 195 .channels_min = 1, 196 .channels_max = 1, 197 .rates = PXA2XX_AC97_RATES, 198 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 199 .capture = { 200 .stream_name = "AC97 Aux Capture", 201 .channels_min = 1, 202 .channels_max = 1, 203 .rates = PXA2XX_AC97_RATES, 204 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 205 .ops = &pxa_ac97_aux_dai_ops, 206 }, 207 { 208 .name = "pxa2xx-ac97-mic", 209 .bus_control = true, 210 .capture = { 211 .stream_name = "AC97 Mic Capture", 212 .channels_min = 1, 213 .channels_max = 1, 214 .rates = PXA2XX_AC97_RATES, 215 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 216 .ops = &pxa_ac97_mic_dai_ops, 217 }, 218 }; 219 220 static const struct snd_soc_component_driver pxa_ac97_component = { 221 .name = "pxa-ac97", 222 }; 223 224 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev) 225 { 226 int ret; 227 228 if (pdev->id != -1) { 229 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n"); 230 return -ENXIO; 231 } 232 233 ret = pxa2xx_ac97_hw_probe(pdev); 234 if (ret) { 235 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret); 236 return ret; 237 } 238 239 ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops); 240 if (ret != 0) 241 return ret; 242 243 /* Punt most of the init to the SoC probe; we may need the machine 244 * driver to do interesting things with the clocking to get us up 245 * and running. 246 */ 247 return snd_soc_register_component(&pdev->dev, &pxa_ac97_component, 248 pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver)); 249 } 250 251 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev) 252 { 253 snd_soc_unregister_component(&pdev->dev); 254 snd_soc_set_ac97_ops(NULL); 255 pxa2xx_ac97_hw_remove(pdev); 256 return 0; 257 } 258 259 #ifdef CONFIG_PM_SLEEP 260 static int pxa2xx_ac97_dev_suspend(struct device *dev) 261 { 262 return pxa2xx_ac97_hw_suspend(); 263 } 264 265 static int pxa2xx_ac97_dev_resume(struct device *dev) 266 { 267 return pxa2xx_ac97_hw_resume(); 268 } 269 270 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, 271 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume); 272 #endif 273 274 static struct platform_driver pxa2xx_ac97_driver = { 275 .probe = pxa2xx_ac97_dev_probe, 276 .remove = pxa2xx_ac97_dev_remove, 277 .driver = { 278 .name = "pxa2xx-ac97", 279 #ifdef CONFIG_PM_SLEEP 280 .pm = &pxa2xx_ac97_pm_ops, 281 #endif 282 }, 283 }; 284 285 module_platform_driver(pxa2xx_ac97_driver); 286 287 MODULE_AUTHOR("Nicolas Pitre"); 288 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 289 MODULE_LICENSE("GPL"); 290