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 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97) 31 { 32 pxa2xx_ac97_try_warm_reset(); 33 34 pxa2xx_ac97_finish_reset(); 35 } 36 37 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97) 38 { 39 pxa2xx_ac97_try_cold_reset(); 40 41 pxa2xx_ac97_finish_reset(); 42 } 43 44 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 45 unsigned short reg) 46 { 47 int ret; 48 49 ret = pxa2xx_ac97_read(ac97->num, reg); 50 if (ret < 0) 51 return 0; 52 else 53 return (unsigned short)(ret & 0xffff); 54 } 55 56 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 57 unsigned short reg, unsigned short val) 58 { 59 int ret; 60 61 ret = pxa2xx_ac97_write(ac97->num, reg, val); 62 } 63 64 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 65 .read = pxa2xx_ac97_legacy_read, 66 .write = pxa2xx_ac97_legacy_write, 67 .warm_reset = pxa2xx_ac97_warm_reset, 68 .reset = pxa2xx_ac97_cold_reset, 69 }; 70 71 static struct pxad_param pxa2xx_ac97_pcm_stereo_in_req = { 72 .prio = PXAD_PRIO_LOWEST, 73 .drcmr = 11, 74 }; 75 76 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = { 77 .addr = __PREG(PCDR), 78 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 79 .maxburst = 32, 80 .filter_data = &pxa2xx_ac97_pcm_stereo_in_req, 81 }; 82 83 static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = { 84 .prio = PXAD_PRIO_LOWEST, 85 .drcmr = 12, 86 }; 87 88 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = { 89 .addr = __PREG(PCDR), 90 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 91 .maxburst = 32, 92 .filter_data = &pxa2xx_ac97_pcm_stereo_out_req, 93 }; 94 95 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = { 96 .prio = PXAD_PRIO_LOWEST, 97 .drcmr = 10, 98 }; 99 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = { 100 .addr = __PREG(MODR), 101 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 102 .maxburst = 16, 103 .filter_data = &pxa2xx_ac97_pcm_aux_mono_out_req, 104 }; 105 106 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = { 107 .prio = PXAD_PRIO_LOWEST, 108 .drcmr = 9, 109 }; 110 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = { 111 .addr = __PREG(MODR), 112 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 113 .maxburst = 16, 114 .filter_data = &pxa2xx_ac97_pcm_aux_mono_in_req, 115 }; 116 117 static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = { 118 .prio = PXAD_PRIO_LOWEST, 119 .drcmr = 8, 120 }; 121 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = { 122 .addr = __PREG(MCDR), 123 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES, 124 .maxburst = 16, 125 .filter_data = &pxa2xx_ac97_pcm_aux_mic_mono_req, 126 }; 127 128 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream, 129 struct snd_soc_dai *cpu_dai) 130 { 131 struct snd_dmaengine_dai_dma_data *dma_data; 132 133 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 134 dma_data = &pxa2xx_ac97_pcm_stereo_out; 135 else 136 dma_data = &pxa2xx_ac97_pcm_stereo_in; 137 138 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 139 140 return 0; 141 } 142 143 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream, 144 struct snd_soc_dai *cpu_dai) 145 { 146 struct snd_dmaengine_dai_dma_data *dma_data; 147 148 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 149 dma_data = &pxa2xx_ac97_pcm_aux_mono_out; 150 else 151 dma_data = &pxa2xx_ac97_pcm_aux_mono_in; 152 153 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); 154 155 return 0; 156 } 157 158 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream, 159 struct snd_soc_dai *cpu_dai) 160 { 161 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 162 return -ENODEV; 163 snd_soc_dai_set_dma_data(cpu_dai, substream, 164 &pxa2xx_ac97_pcm_mic_mono_in); 165 166 return 0; 167 } 168 169 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 170 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ 171 SNDRV_PCM_RATE_48000) 172 173 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = { 174 .startup = pxa2xx_ac97_hifi_startup, 175 }; 176 177 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = { 178 .startup = pxa2xx_ac97_aux_startup, 179 }; 180 181 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = { 182 .startup = pxa2xx_ac97_mic_startup, 183 }; 184 185 /* 186 * There is only 1 physical AC97 interface for pxa2xx, but it 187 * has extra fifo's that can be used for aux DACs and ADCs. 188 */ 189 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = { 190 { 191 .name = "pxa2xx-ac97", 192 .bus_control = true, 193 .playback = { 194 .stream_name = "AC97 Playback", 195 .channels_min = 2, 196 .channels_max = 2, 197 .rates = PXA2XX_AC97_RATES, 198 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 199 .capture = { 200 .stream_name = "AC97 Capture", 201 .channels_min = 2, 202 .channels_max = 2, 203 .rates = PXA2XX_AC97_RATES, 204 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 205 .ops = &pxa_ac97_hifi_dai_ops, 206 }, 207 { 208 .name = "pxa2xx-ac97-aux", 209 .bus_control = true, 210 .playback = { 211 .stream_name = "AC97 Aux Playback", 212 .channels_min = 1, 213 .channels_max = 1, 214 .rates = PXA2XX_AC97_RATES, 215 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 216 .capture = { 217 .stream_name = "AC97 Aux Capture", 218 .channels_min = 1, 219 .channels_max = 1, 220 .rates = PXA2XX_AC97_RATES, 221 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 222 .ops = &pxa_ac97_aux_dai_ops, 223 }, 224 { 225 .name = "pxa2xx-ac97-mic", 226 .bus_control = true, 227 .capture = { 228 .stream_name = "AC97 Mic Capture", 229 .channels_min = 1, 230 .channels_max = 1, 231 .rates = PXA2XX_AC97_RATES, 232 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 233 .ops = &pxa_ac97_mic_dai_ops, 234 }, 235 }; 236 237 static const struct snd_soc_component_driver pxa_ac97_component = { 238 .name = "pxa-ac97", 239 }; 240 241 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev) 242 { 243 int ret; 244 245 if (pdev->id != -1) { 246 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n"); 247 return -ENXIO; 248 } 249 250 ret = pxa2xx_ac97_hw_probe(pdev); 251 if (ret) { 252 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret); 253 return ret; 254 } 255 256 ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops); 257 if (ret != 0) 258 return ret; 259 260 /* Punt most of the init to the SoC probe; we may need the machine 261 * driver to do interesting things with the clocking to get us up 262 * and running. 263 */ 264 return snd_soc_register_component(&pdev->dev, &pxa_ac97_component, 265 pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver)); 266 } 267 268 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev) 269 { 270 snd_soc_unregister_component(&pdev->dev); 271 snd_soc_set_ac97_ops(NULL); 272 pxa2xx_ac97_hw_remove(pdev); 273 return 0; 274 } 275 276 #ifdef CONFIG_PM_SLEEP 277 static int pxa2xx_ac97_dev_suspend(struct device *dev) 278 { 279 return pxa2xx_ac97_hw_suspend(); 280 } 281 282 static int pxa2xx_ac97_dev_resume(struct device *dev) 283 { 284 return pxa2xx_ac97_hw_resume(); 285 } 286 287 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, 288 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume); 289 #endif 290 291 static struct platform_driver pxa2xx_ac97_driver = { 292 .probe = pxa2xx_ac97_dev_probe, 293 .remove = pxa2xx_ac97_dev_remove, 294 .driver = { 295 .name = "pxa2xx-ac97", 296 #ifdef CONFIG_PM_SLEEP 297 .pm = &pxa2xx_ac97_pm_ops, 298 #endif 299 }, 300 }; 301 302 module_platform_driver(pxa2xx_ac97_driver); 303 304 MODULE_AUTHOR("Nicolas Pitre"); 305 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 306 MODULE_LICENSE("GPL"); 307 MODULE_ALIAS("platform:pxa2xx-ac97"); 308