pxa2xx-ac97.c (6788B)
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 <linux/platform_data/asoc-pxa.h> 25 26static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) 27{ 28 if (!pxa2xx_ac97_try_cold_reset()) 29 pxa2xx_ac97_try_warm_reset(); 30 31 pxa2xx_ac97_finish_reset(); 32} 33 34static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, 35 unsigned short reg) 36{ 37 int ret; 38 39 ret = pxa2xx_ac97_read(ac97->num, reg); 40 if (ret < 0) 41 return 0; 42 else 43 return (unsigned short)(ret & 0xffff); 44} 45 46static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, 47 unsigned short reg, unsigned short val) 48{ 49 pxa2xx_ac97_write(ac97->num, reg, val); 50} 51 52static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = { 53 .read = pxa2xx_ac97_legacy_read, 54 .write = pxa2xx_ac97_legacy_write, 55 .reset = pxa2xx_ac97_legacy_reset, 56}; 57 58static struct snd_pcm *pxa2xx_ac97_pcm; 59static struct snd_ac97 *pxa2xx_ac97_ac97; 60 61static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream) 62{ 63 struct snd_pcm_runtime *runtime = substream->runtime; 64 pxa2xx_audio_ops_t *platform_ops; 65 int ret, i; 66 67 ret = pxa2xx_pcm_open(substream); 68 if (ret) 69 return ret; 70 71 runtime->hw.channels_min = 2; 72 runtime->hw.channels_max = 2; 73 74 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 75 AC97_RATES_FRONT_DAC : AC97_RATES_ADC; 76 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i]; 77 snd_pcm_limit_hw_rates(runtime); 78 79 platform_ops = substream->pcm->card->dev->platform_data; 80 if (platform_ops && platform_ops->startup) { 81 ret = platform_ops->startup(substream, platform_ops->priv); 82 if (ret < 0) 83 pxa2xx_pcm_close(substream); 84 } 85 86 return ret; 87} 88 89static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream) 90{ 91 pxa2xx_audio_ops_t *platform_ops; 92 93 platform_ops = substream->pcm->card->dev->platform_data; 94 if (platform_ops && platform_ops->shutdown) 95 platform_ops->shutdown(substream, platform_ops->priv); 96 97 return 0; 98} 99 100static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) 101{ 102 struct snd_pcm_runtime *runtime = substream->runtime; 103 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 104 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 105 int ret; 106 107 ret = pxa2xx_pcm_prepare(substream); 108 if (ret < 0) 109 return ret; 110 111 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); 112} 113 114#ifdef CONFIG_PM_SLEEP 115 116static int pxa2xx_ac97_do_suspend(struct snd_card *card) 117{ 118 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 119 120 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); 121 snd_ac97_suspend(pxa2xx_ac97_ac97); 122 if (platform_ops && platform_ops->suspend) 123 platform_ops->suspend(platform_ops->priv); 124 125 return pxa2xx_ac97_hw_suspend(); 126} 127 128static int pxa2xx_ac97_do_resume(struct snd_card *card) 129{ 130 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; 131 int rc; 132 133 rc = pxa2xx_ac97_hw_resume(); 134 if (rc) 135 return rc; 136 137 if (platform_ops && platform_ops->resume) 138 platform_ops->resume(platform_ops->priv); 139 snd_ac97_resume(pxa2xx_ac97_ac97); 140 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 141 142 return 0; 143} 144 145static int pxa2xx_ac97_suspend(struct device *dev) 146{ 147 struct snd_card *card = dev_get_drvdata(dev); 148 int ret = 0; 149 150 if (card) 151 ret = pxa2xx_ac97_do_suspend(card); 152 153 return ret; 154} 155 156static int pxa2xx_ac97_resume(struct device *dev) 157{ 158 struct snd_card *card = dev_get_drvdata(dev); 159 int ret = 0; 160 161 if (card) 162 ret = pxa2xx_ac97_do_resume(card); 163 164 return ret; 165} 166 167static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); 168#endif 169 170static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { 171 .open = pxa2xx_ac97_pcm_open, 172 .close = pxa2xx_ac97_pcm_close, 173 .hw_params = pxa2xx_pcm_hw_params, 174 .prepare = pxa2xx_ac97_pcm_prepare, 175 .trigger = pxa2xx_pcm_trigger, 176 .pointer = pxa2xx_pcm_pointer, 177}; 178 179 180static int pxa2xx_ac97_pcm_new(struct snd_card *card) 181{ 182 struct snd_pcm *pcm; 183 int ret; 184 185 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); 186 if (ret) 187 goto out; 188 189 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); 190 if (ret) 191 goto out; 192 193 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops); 194 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops); 195 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm); 196 if (ret) 197 goto out; 198 199 pxa2xx_ac97_pcm = pcm; 200 ret = 0; 201 202 out: 203 return ret; 204} 205 206static int pxa2xx_ac97_probe(struct platform_device *dev) 207{ 208 struct snd_card *card; 209 struct snd_ac97_bus *ac97_bus; 210 struct snd_ac97_template ac97_template; 211 int ret; 212 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; 213 214 if (dev->id >= 0) { 215 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); 216 ret = -ENXIO; 217 goto err_dev; 218 } 219 220 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, 221 THIS_MODULE, 0, &card); 222 if (ret < 0) 223 goto err; 224 225 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); 226 227 ret = pxa2xx_ac97_pcm_new(card); 228 if (ret) 229 goto err; 230 231 ret = pxa2xx_ac97_hw_probe(dev); 232 if (ret) 233 goto err; 234 235 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); 236 if (ret) 237 goto err_remove; 238 memset(&ac97_template, 0, sizeof(ac97_template)); 239 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); 240 if (ret) 241 goto err_remove; 242 243 snprintf(card->shortname, sizeof(card->shortname), 244 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); 245 snprintf(card->longname, sizeof(card->longname), 246 "%s (%s)", dev->dev.driver->name, card->mixername); 247 248 if (pdata && pdata->codec_pdata[0]) 249 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); 250 ret = snd_card_register(card); 251 if (ret == 0) { 252 platform_set_drvdata(dev, card); 253 return 0; 254 } 255 256err_remove: 257 pxa2xx_ac97_hw_remove(dev); 258err: 259 if (card) 260 snd_card_free(card); 261err_dev: 262 return ret; 263} 264 265static int pxa2xx_ac97_remove(struct platform_device *dev) 266{ 267 struct snd_card *card = platform_get_drvdata(dev); 268 269 if (card) { 270 snd_card_free(card); 271 pxa2xx_ac97_hw_remove(dev); 272 } 273 274 return 0; 275} 276 277static struct platform_driver pxa2xx_ac97_driver = { 278 .probe = pxa2xx_ac97_probe, 279 .remove = pxa2xx_ac97_remove, 280 .driver = { 281 .name = "pxa2xx-ac97", 282#ifdef CONFIG_PM_SLEEP 283 .pm = &pxa2xx_ac97_pm_ops, 284#endif 285 }, 286}; 287 288module_platform_driver(pxa2xx_ac97_driver); 289 290MODULE_AUTHOR("Nicolas Pitre"); 291MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); 292MODULE_LICENSE("GPL"); 293MODULE_ALIAS("platform:pxa2xx-ac97");