1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. 4 * 5 * Author: Nicolas Pitre 6 * Created: Dec 02, 2004 7 * Copyright: MontaVista Software Inc. 8 */ 9 10 #include <linux/init.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/dmaengine.h> 15 #include <linux/dma-mapping.h> 16 17 #include <sound/core.h> 18 #include <sound/pcm.h> 19 #include <sound/ac97_codec.h> 20 #include <sound/initval.h> 21 #include <sound/pxa2xx-lib.h> 22 #include <sound/dmaengine_pcm.h> 23 24 #include <mach/regs-ac97.h> 25 #include <mach/audio.h> 26 27 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) 28 { 29 if (!pxa2xx_ac97_try_cold_reset()) 30 pxa2xx_ac97_try_warm_reset(); 31 32 pxa2xx_ac97_finish_reset(); 33 } 34 35 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 36 unsigned short reg) 37 { 38 int ret; 39 40 ret = pxa2xx_ac97_read(ac97->num, reg); 41 if (ret < 0) 42 return 0; 43 else 44 return (unsigned short)(ret & 0xffff); 45 } 46 47 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 48 unsigned short reg, unsigned short val) 49 { 50 int __always_unused ret; 51 52 ret = pxa2xx_ac97_write(ac97->num, reg, val); 53 } 54 55 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 56 .read = pxa2xx_ac97_legacy_read, 57 .write = pxa2xx_ac97_legacy_write, 58 .reset = pxa2xx_ac97_legacy_reset, 59 }; 60 61 static struct snd_pcm *pxa2xx_ac97_pcm; 62 static struct snd_ac97 *pxa2xx_ac97_ac97; 63 64 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream) 65 { 66 struct snd_pcm_runtime *runtime = substream->runtime; 67 pxa2xx_audio_ops_t *platform_ops; 68 int ret, i; 69 70 ret = pxa2xx_pcm_open(substream); 71 if (ret) 72 return ret; 73 74 runtime->hw.channels_min = 2; 75 runtime->hw.channels_max = 2; 76 77 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 78 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 79 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i]; 80 snd_pcm_limit_hw_rates(runtime); 81 82 platform_ops = substream->pcm->card->dev->platform_data; 83 if (platform_ops && platform_ops->startup) { 84 ret = platform_ops->startup(substream, platform_ops->priv); 85 if (ret < 0) 86 pxa2xx_pcm_close(substream); 87 } 88 89 return ret; 90 } 91 92 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream) 93 { 94 pxa2xx_audio_ops_t *platform_ops; 95 96 platform_ops = substream->pcm->card->dev->platform_data; 97 if (platform_ops && platform_ops->shutdown) 98 platform_ops->shutdown(substream, platform_ops->priv); 99 100 return 0; 101 } 102 103 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 104 { 105 struct snd_pcm_runtime *runtime = substream->runtime; 106 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 107 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 108 int ret; 109 110 ret = pxa2xx_pcm_prepare(substream); 111 if (ret < 0) 112 return ret; 113 114 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 115 } 116 117 #ifdef CONFIG_PM_SLEEP 118 119 static int pxa2xx_ac97_do_suspend(struct snd_card *card) 120 { 121 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 122 123 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 124 snd_ac97_suspend(pxa2xx_ac97_ac97); 125 if (platform_ops && platform_ops->suspend) 126 platform_ops->suspend(platform_ops->priv); 127 128 return pxa2xx_ac97_hw_suspend(); 129 } 130 131 static int pxa2xx_ac97_do_resume(struct snd_card *card) 132 { 133 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 134 int rc; 135 136 rc = pxa2xx_ac97_hw_resume(); 137 if (rc) 138 return rc; 139 140 if (platform_ops && platform_ops->resume) 141 platform_ops->resume(platform_ops->priv); 142 snd_ac97_resume(pxa2xx_ac97_ac97); 143 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 144 145 return 0; 146 } 147 148 static int pxa2xx_ac97_suspend(struct device *dev) 149 { 150 struct snd_card *card = dev_get_drvdata(dev); 151 int ret = 0; 152 153 if (card) 154 ret = pxa2xx_ac97_do_suspend(card); 155 156 return ret; 157 } 158 159 static int pxa2xx_ac97_resume(struct device *dev) 160 { 161 struct snd_card *card = dev_get_drvdata(dev); 162 int ret = 0; 163 164 if (card) 165 ret = pxa2xx_ac97_do_resume(card); 166 167 return ret; 168 } 169 170 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 171 #endif 172 173 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { 174 .open = pxa2xx_ac97_pcm_open, 175 .close = pxa2xx_ac97_pcm_close, 176 .hw_params = pxa2xx_pcm_hw_params, 177 .hw_free = pxa2xx_pcm_hw_free, 178 .prepare = pxa2xx_ac97_pcm_prepare, 179 .trigger = pxa2xx_pcm_trigger, 180 .pointer = pxa2xx_pcm_pointer, 181 .mmap = pxa2xx_pcm_mmap, 182 }; 183 184 185 static int pxa2xx_ac97_pcm_new(struct snd_card *card) 186 { 187 struct snd_pcm *pcm; 188 int stream, ret; 189 190 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 191 if (ret) 192 goto out; 193 194 pcm->private_free = pxa2xx_pcm_free_dma_buffers; 195 196 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 197 if (ret) 198 goto out; 199 200 stream = SNDRV_PCM_STREAM_PLAYBACK; 201 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 202 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 203 if (ret) 204 goto out; 205 206 stream = SNDRV_PCM_STREAM_CAPTURE; 207 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops); 208 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream); 209 if (ret) 210 goto out; 211 212 pxa2xx_ac97_pcm = pcm; 213 ret = 0; 214 215 out: 216 return ret; 217 } 218 219 static int pxa2xx_ac97_probe(struct platform_device *dev) 220 { 221 struct snd_card *card; 222 struct snd_ac97_bus *ac97_bus; 223 struct snd_ac97_template ac97_template; 224 int ret; 225 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 226 227 if (dev->id >= 0) { 228 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 229 ret = -ENXIO; 230 goto err_dev; 231 } 232 233 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 234 THIS_MODULE, 0, &card); 235 if (ret < 0) 236 goto err; 237 238 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 239 240 ret = pxa2xx_ac97_pcm_new(card); 241 if (ret) 242 goto err; 243 244 ret = pxa2xx_ac97_hw_probe(dev); 245 if (ret) 246 goto err; 247 248 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 249 if (ret) 250 goto err_remove; 251 memset(&ac97_template, 0, sizeof(ac97_template)); 252 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 253 if (ret) 254 goto err_remove; 255 256 snprintf(card->shortname, sizeof(card->shortname), 257 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 258 snprintf(card->longname, sizeof(card->longname), 259 "%s (%s)", dev->dev.driver->name, card->mixername); 260 261 if (pdata && pdata->codec_pdata[0]) 262 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 263 ret = snd_card_register(card); 264 if (ret == 0) { 265 platform_set_drvdata(dev, card); 266 return 0; 267 } 268 269 err_remove: 270 pxa2xx_ac97_hw_remove(dev); 271 err: 272 if (card) 273 snd_card_free(card); 274 err_dev: 275 return ret; 276 } 277 278 static int pxa2xx_ac97_remove(struct platform_device *dev) 279 { 280 struct snd_card *card = platform_get_drvdata(dev); 281 282 if (card) { 283 snd_card_free(card); 284 pxa2xx_ac97_hw_remove(dev); 285 } 286 287 return 0; 288 } 289 290 static struct platform_driver pxa2xx_ac97_driver = { 291 .probe = pxa2xx_ac97_probe, 292 .remove = pxa2xx_ac97_remove, 293 .driver = { 294 .name = "pxa2xx-ac97", 295 #ifdef CONFIG_PM_SLEEP 296 .pm = &pxa2xx_ac97_pm_ops, 297 #endif 298 }, 299 }; 300 301 module_platform_driver(pxa2xx_ac97_driver); 302 303 MODULE_AUTHOR("Nicolas Pitre"); 304 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 305 MODULE_LICENSE("GPL"); 306 MODULE_ALIAS("platform:pxa2xx-ac97"); 307