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-mapping.h> 19 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/ac97_codec.h> 23 #include <sound/initval.h> 24 #include <sound/pxa2xx-lib.h> 25 #include <sound/dmaengine_pcm.h> 26 27 #include <mach/regs-ac97.h> 28 #include <mach/audio.h> 29 30 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) 31 { 32 if (!pxa2xx_ac97_try_cold_reset()) 33 pxa2xx_ac97_try_warm_reset(); 34 35 pxa2xx_ac97_finish_reset(); 36 } 37 38 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 39 unsigned short reg) 40 { 41 int ret; 42 43 ret = pxa2xx_ac97_read(ac97->num, reg); 44 if (ret < 0) 45 return 0; 46 else 47 return (unsigned short)(ret & 0xffff); 48 } 49 50 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 51 unsigned short reg, unsigned short val) 52 { 53 int __always_unused ret; 54 55 ret = pxa2xx_ac97_write(ac97->num, reg, val); 56 } 57 58 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 59 .read = pxa2xx_ac97_legacy_read, 60 .write = pxa2xx_ac97_legacy_write, 61 .reset = pxa2xx_ac97_legacy_reset, 62 }; 63 64 static struct snd_pcm *pxa2xx_ac97_pcm; 65 static struct snd_ac97 *pxa2xx_ac97_ac97; 66 67 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream) 68 { 69 struct snd_pcm_runtime *runtime = substream->runtime; 70 pxa2xx_audio_ops_t *platform_ops; 71 int ret, i; 72 73 ret = pxa2xx_pcm_open(substream); 74 if (ret) 75 return ret; 76 77 runtime->hw.channels_min = 2; 78 runtime->hw.channels_max = 2; 79 80 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 81 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 82 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i]; 83 snd_pcm_limit_hw_rates(runtime); 84 85 platform_ops = substream->pcm->card->dev->platform_data; 86 if (platform_ops && platform_ops->startup) { 87 ret = platform_ops->startup(substream, platform_ops->priv); 88 if (ret < 0) 89 pxa2xx_pcm_close(substream); 90 } 91 92 return ret; 93 } 94 95 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream) 96 { 97 pxa2xx_audio_ops_t *platform_ops; 98 99 platform_ops = substream->pcm->card->dev->platform_data; 100 if (platform_ops && platform_ops->shutdown) 101 platform_ops->shutdown(substream, platform_ops->priv); 102 103 return 0; 104 } 105 106 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 107 { 108 struct snd_pcm_runtime *runtime = substream->runtime; 109 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 110 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 111 int ret; 112 113 ret = pxa2xx_pcm_prepare(substream); 114 if (ret < 0) 115 return ret; 116 117 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 118 } 119 120 #ifdef CONFIG_PM_SLEEP 121 122 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 123 { 124 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 125 126 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 127 snd_ac97_suspend(pxa2xx_ac97_ac97); 128 if (platform_ops && platform_ops->suspend) 129 platform_ops->suspend(platform_ops->priv); 130 131 return pxa2xx_ac97_hw_suspend(); 132 } 133 134 static int pxa2xx_ac97_do_resume(struct snd_card *card) 135 { 136 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 137 int rc; 138 139 rc = pxa2xx_ac97_hw_resume(); 140 if (rc) 141 return rc; 142 143 if (platform_ops && platform_ops->resume) 144 platform_ops->resume(platform_ops->priv); 145 snd_ac97_resume(pxa2xx_ac97_ac97); 146 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 147 148 return 0; 149 } 150 151 static int pxa2xx_ac97_suspend(struct device *dev) 152 { 153 struct snd_card *card = dev_get_drvdata(dev); 154 int ret = 0; 155 156 if (card) 157 ret = pxa2xx_ac97_do_suspend(card); 158 159 return ret; 160 } 161 162 static int pxa2xx_ac97_resume(struct device *dev) 163 { 164 struct snd_card *card = dev_get_drvdata(dev); 165 int ret = 0; 166 167 if (card) 168 ret = pxa2xx_ac97_do_resume(card); 169 170 return ret; 171 } 172 173 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 174 #endif 175 176 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { 177 .open = pxa2xx_ac97_pcm_open, 178 .close = pxa2xx_ac97_pcm_close, 179 .ioctl = snd_pcm_lib_ioctl, 180 .hw_params = pxa2xx_pcm_hw_params, 181 .hw_free = pxa2xx_pcm_hw_free, 182 .prepare = pxa2xx_ac97_pcm_prepare, 183 .trigger = pxa2xx_pcm_trigger, 184 .pointer = pxa2xx_pcm_pointer, 185 .mmap = pxa2xx_pcm_mmap, 186 }; 187 188 189 static int pxa2xx_ac97_pcm_new(struct snd_card *card) 190 { 191 struct snd_pcm *pcm; 192 int stream, ret; 193 194 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 195 if (ret) 196 goto out; 197 198 pcm->private_free = pxa2xx_pcm_free_dma_buffers; 199 200 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 201 if (ret) 202 goto out; 203 204 stream = SNDRV_PCM_STREAM_PLAYBACK; 205 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 206 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 207 if (ret) 208 goto out; 209 210 stream = SNDRV_PCM_STREAM_CAPTURE; 211 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 212 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 213 if (ret) 214 goto out; 215 216 pxa2xx_ac97_pcm = pcm; 217 ret = 0; 218 219 out: 220 return ret; 221 } 222 223 static int pxa2xx_ac97_probe(struct platform_device *dev) 224 { 225 struct snd_card *card; 226 struct snd_ac97_bus *ac97_bus; 227 struct snd_ac97_template ac97_template; 228 int ret; 229 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 230 231 if (dev->id >= 0) { 232 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 233 ret = -ENXIO; 234 goto err_dev; 235 } 236 237 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 238 THIS_MODULE, 0, &card); 239 if (ret < 0) 240 goto err; 241 242 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 243 244 ret = pxa2xx_ac97_pcm_new(card); 245 if (ret) 246 goto err; 247 248 ret = pxa2xx_ac97_hw_probe(dev); 249 if (ret) 250 goto err; 251 252 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 253 if (ret) 254 goto err_remove; 255 memset(&ac97_template, 0, sizeof(ac97_template)); 256 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 257 if (ret) 258 goto err_remove; 259 260 snprintf(card->shortname, sizeof(card->shortname), 261 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 262 snprintf(card->longname, sizeof(card->longname), 263 "%s (%s)", dev->dev.driver->name, card->mixername); 264 265 if (pdata && pdata->codec_pdata[0]) 266 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 267 ret = snd_card_register(card); 268 if (ret == 0) { 269 platform_set_drvdata(dev, card); 270 return 0; 271 } 272 273 err_remove: 274 pxa2xx_ac97_hw_remove(dev); 275 err: 276 if (card) 277 snd_card_free(card); 278 err_dev: 279 return ret; 280 } 281 282 static int pxa2xx_ac97_remove(struct platform_device *dev) 283 { 284 struct snd_card *card = platform_get_drvdata(dev); 285 286 if (card) { 287 snd_card_free(card); 288 pxa2xx_ac97_hw_remove(dev); 289 } 290 291 return 0; 292 } 293 294 static struct platform_driver pxa2xx_ac97_driver = { 295 .probe = pxa2xx_ac97_probe, 296 .remove = pxa2xx_ac97_remove, 297 .driver = { 298 .name = "pxa2xx-ac97", 299 #ifdef CONFIG_PM_SLEEP 300 .pm = &pxa2xx_ac97_pm_ops, 301 #endif 302 }, 303 }; 304 305 module_platform_driver(pxa2xx_ac97_driver); 306 307 MODULE_AUTHOR("Nicolas Pitre"); 308 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 309 MODULE_LICENSE("GPL"); 310 MODULE_ALIAS("platform:pxa2xx-ac97"); 311