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 .prepare = pxa2xx_ac97_pcm_prepare, 176 .trigger = pxa2xx_pcm_trigger, 177 .pointer = pxa2xx_pcm_pointer, 178 }; 179 180 181 static int pxa2xx_ac97_pcm_new(struct snd_card *card) 182 { 183 struct snd_pcm *pcm; 184 int ret; 185 186 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 187 if (ret) 188 goto out; 189 190 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 191 if (ret) 192 goto out; 193 194 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops); 195 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops); 196 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm); 197 if (ret) 198 goto out; 199 200 pxa2xx_ac97_pcm = pcm; 201 ret = 0; 202 203 out: 204 return ret; 205 } 206 207 static int pxa2xx_ac97_probe(struct platform_device *dev) 208 { 209 struct snd_card *card; 210 struct snd_ac97_bus *ac97_bus; 211 struct snd_ac97_template ac97_template; 212 int ret; 213 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 214 215 if (dev->id >= 0) { 216 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 217 ret = -ENXIO; 218 goto err_dev; 219 } 220 221 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 222 THIS_MODULE, 0, &card); 223 if (ret < 0) 224 goto err; 225 226 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 227 228 ret = pxa2xx_ac97_pcm_new(card); 229 if (ret) 230 goto err; 231 232 ret = pxa2xx_ac97_hw_probe(dev); 233 if (ret) 234 goto err; 235 236 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 237 if (ret) 238 goto err_remove; 239 memset(&ac97_template, 0, sizeof(ac97_template)); 240 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 241 if (ret) 242 goto err_remove; 243 244 snprintf(card->shortname, sizeof(card->shortname), 245 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 246 snprintf(card->longname, sizeof(card->longname), 247 "%s (%s)", dev->dev.driver->name, card->mixername); 248 249 if (pdata && pdata->codec_pdata[0]) 250 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 251 ret = snd_card_register(card); 252 if (ret == 0) { 253 platform_set_drvdata(dev, card); 254 return 0; 255 } 256 257 err_remove: 258 pxa2xx_ac97_hw_remove(dev); 259 err: 260 if (card) 261 snd_card_free(card); 262 err_dev: 263 return ret; 264 } 265 266 static int pxa2xx_ac97_remove(struct platform_device *dev) 267 { 268 struct snd_card *card = platform_get_drvdata(dev); 269 270 if (card) { 271 snd_card_free(card); 272 pxa2xx_ac97_hw_remove(dev); 273 } 274 275 return 0; 276 } 277 278 static struct platform_driver pxa2xx_ac97_driver = { 279 .probe = pxa2xx_ac97_probe, 280 .remove = pxa2xx_ac97_remove, 281 .driver = { 282 .name = "pxa2xx-ac97", 283 #ifdef CONFIG_PM_SLEEP 284 .pm = &pxa2xx_ac97_pm_ops, 285 #endif 286 }, 287 }; 288 289 module_platform_driver(pxa2xx_ac97_driver); 290 291 MODULE_AUTHOR("Nicolas Pitre"); 292 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 293 MODULE_LICENSE("GPL"); 294 MODULE_ALIAS("platform:pxa2xx-ac97"); 295