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