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_pcm_suspend_all(pxa2xx_ac97_pcm); 128 snd_ac97_suspend(pxa2xx_ac97_ac97); 129 if (platform_ops && platform_ops->suspend) 130 platform_ops->suspend(platform_ops->priv); 131 132 return pxa2xx_ac97_hw_suspend(); 133 } 134 135 static int pxa2xx_ac97_do_resume(struct snd_card *card) 136 { 137 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 138 int rc; 139 140 rc = pxa2xx_ac97_hw_resume(); 141 if (rc) 142 return rc; 143 144 if (platform_ops && platform_ops->resume) 145 platform_ops->resume(platform_ops->priv); 146 snd_ac97_resume(pxa2xx_ac97_ac97); 147 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 148 149 return 0; 150 } 151 152 static int pxa2xx_ac97_suspend(struct device *dev) 153 { 154 struct snd_card *card = dev_get_drvdata(dev); 155 int ret = 0; 156 157 if (card) 158 ret = pxa2xx_ac97_do_suspend(card); 159 160 return ret; 161 } 162 163 static int pxa2xx_ac97_resume(struct device *dev) 164 { 165 struct snd_card *card = dev_get_drvdata(dev); 166 int ret = 0; 167 168 if (card) 169 ret = pxa2xx_ac97_do_resume(card); 170 171 return ret; 172 } 173 174 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 175 #endif 176 177 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { 178 .open = pxa2xx_ac97_pcm_open, 179 .close = pxa2xx_ac97_pcm_close, 180 .ioctl = snd_pcm_lib_ioctl, 181 .hw_params = pxa2xx_pcm_hw_params, 182 .hw_free = pxa2xx_pcm_hw_free, 183 .prepare = pxa2xx_ac97_pcm_prepare, 184 .trigger = pxa2xx_pcm_trigger, 185 .pointer = pxa2xx_pcm_pointer, 186 .mmap = pxa2xx_pcm_mmap, 187 }; 188 189 190 static int pxa2xx_ac97_pcm_new(struct snd_card *card) 191 { 192 struct snd_pcm *pcm; 193 int stream, ret; 194 195 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 196 if (ret) 197 goto out; 198 199 pcm->private_free = pxa2xx_pcm_free_dma_buffers; 200 201 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 202 if (ret) 203 goto out; 204 205 stream = SNDRV_PCM_STREAM_PLAYBACK; 206 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 207 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 208 if (ret) 209 goto out; 210 211 stream = SNDRV_PCM_STREAM_CAPTURE; 212 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 213 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 214 if (ret) 215 goto out; 216 217 pxa2xx_ac97_pcm = pcm; 218 ret = 0; 219 220 out: 221 return ret; 222 } 223 224 static int pxa2xx_ac97_probe(struct platform_device *dev) 225 { 226 struct snd_card *card; 227 struct snd_ac97_bus *ac97_bus; 228 struct snd_ac97_template ac97_template; 229 int ret; 230 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 231 232 if (dev->id >= 0) { 233 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 234 ret = -ENXIO; 235 goto err_dev; 236 } 237 238 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 239 THIS_MODULE, 0, &card); 240 if (ret < 0) 241 goto err; 242 243 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 244 245 ret = pxa2xx_ac97_pcm_new(card); 246 if (ret) 247 goto err; 248 249 ret = pxa2xx_ac97_hw_probe(dev); 250 if (ret) 251 goto err; 252 253 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 254 if (ret) 255 goto err_remove; 256 memset(&ac97_template, 0, sizeof(ac97_template)); 257 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 258 if (ret) 259 goto err_remove; 260 261 snprintf(card->shortname, sizeof(card->shortname), 262 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 263 snprintf(card->longname, sizeof(card->longname), 264 "%s (%s)", dev->dev.driver->name, card->mixername); 265 266 if (pdata && pdata->codec_pdata[0]) 267 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 268 ret = snd_card_register(card); 269 if (ret == 0) { 270 platform_set_drvdata(dev, card); 271 return 0; 272 } 273 274 err_remove: 275 pxa2xx_ac97_hw_remove(dev); 276 err: 277 if (card) 278 snd_card_free(card); 279 err_dev: 280 return ret; 281 } 282 283 static int pxa2xx_ac97_remove(struct platform_device *dev) 284 { 285 struct snd_card *card = platform_get_drvdata(dev); 286 287 if (card) { 288 snd_card_free(card); 289 pxa2xx_ac97_hw_remove(dev); 290 } 291 292 return 0; 293 } 294 295 static struct platform_driver pxa2xx_ac97_driver = { 296 .probe = pxa2xx_ac97_probe, 297 .remove = pxa2xx_ac97_remove, 298 .driver = { 299 .name = "pxa2xx-ac97", 300 #ifdef CONFIG_PM_SLEEP 301 .pm = &pxa2xx_ac97_pm_ops, 302 #endif 303 }, 304 }; 305 306 module_platform_driver(pxa2xx_ac97_driver); 307 308 MODULE_AUTHOR("Nicolas Pitre"); 309 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 310 MODULE_LICENSE("GPL"); 311 MODULE_ALIAS("platform:pxa2xx-ac97"); 312