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