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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.4 *5 * Author: Nicolas Pitre6 * Created: Dec 02, 20047 * 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 else43 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 114static int pxa2xx_ac97_do_suspend(struct snd_card *card)115{116 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;117 118 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);119 snd_ac97_suspend(pxa2xx_ac97_ac97);120 if (platform_ops && platform_ops->suspend)121 platform_ops->suspend(platform_ops->priv);122 123 return pxa2xx_ac97_hw_suspend();124}125 126static int pxa2xx_ac97_do_resume(struct snd_card *card)127{128 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;129 int rc;130 131 rc = pxa2xx_ac97_hw_resume();132 if (rc)133 return rc;134 135 if (platform_ops && platform_ops->resume)136 platform_ops->resume(platform_ops->priv);137 snd_ac97_resume(pxa2xx_ac97_ac97);138 snd_power_change_state(card, SNDRV_CTL_POWER_D0);139 140 return 0;141}142 143static int pxa2xx_ac97_suspend(struct device *dev)144{145 struct snd_card *card = dev_get_drvdata(dev);146 int ret = 0;147 148 if (card)149 ret = pxa2xx_ac97_do_suspend(card);150 151 return ret;152}153 154static int pxa2xx_ac97_resume(struct device *dev)155{156 struct snd_card *card = dev_get_drvdata(dev);157 int ret = 0;158 159 if (card)160 ret = pxa2xx_ac97_do_resume(card);161 162 return ret;163}164 165static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);166 167static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {168 .open = pxa2xx_ac97_pcm_open,169 .close = pxa2xx_ac97_pcm_close,170 .hw_params = pxa2xx_pcm_hw_params,171 .prepare = pxa2xx_ac97_pcm_prepare,172 .trigger = pxa2xx_pcm_trigger,173 .pointer = pxa2xx_pcm_pointer,174};175 176 177static int pxa2xx_ac97_pcm_new(struct snd_card *card)178{179 struct snd_pcm *pcm;180 int ret;181 182 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);183 if (ret)184 goto out;185 186 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));187 if (ret)188 goto out;189 190 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops);191 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops);192 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm);193 if (ret)194 goto out;195 196 pxa2xx_ac97_pcm = pcm;197 ret = 0;198 199 out:200 return ret;201}202 203static int pxa2xx_ac97_probe(struct platform_device *dev)204{205 struct snd_card *card;206 struct snd_ac97_bus *ac97_bus;207 struct snd_ac97_template ac97_template;208 int ret;209 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;210 211 if (dev->id >= 0) {212 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");213 ret = -ENXIO;214 goto err_dev;215 }216 217 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,218 THIS_MODULE, 0, &card);219 if (ret < 0)220 goto err;221 222 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));223 224 ret = pxa2xx_ac97_pcm_new(card);225 if (ret)226 goto err;227 228 ret = pxa2xx_ac97_hw_probe(dev);229 if (ret)230 goto err;231 232 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);233 if (ret)234 goto err_remove;235 memset(&ac97_template, 0, sizeof(ac97_template));236 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);237 if (ret)238 goto err_remove;239 240 snprintf(card->shortname, sizeof(card->shortname),241 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));242 snprintf(card->longname, sizeof(card->longname),243 "%s (%s)", dev->dev.driver->name, card->mixername);244 245 if (pdata && pdata->codec_pdata[0])246 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);247 ret = snd_card_register(card);248 if (ret == 0) {249 platform_set_drvdata(dev, card);250 return 0;251 }252 253err_remove:254 pxa2xx_ac97_hw_remove(dev);255err:256 if (card)257 snd_card_free(card);258err_dev:259 return ret;260}261 262static void pxa2xx_ac97_remove(struct platform_device *dev)263{264 struct snd_card *card = platform_get_drvdata(dev);265 266 if (card) {267 snd_card_free(card);268 pxa2xx_ac97_hw_remove(dev);269 }270}271 272static struct platform_driver pxa2xx_ac97_driver = {273 .probe = pxa2xx_ac97_probe,274 .remove_new = pxa2xx_ac97_remove,275 .driver = {276 .name = "pxa2xx-ac97",277 .pm = &pxa2xx_ac97_pm_ops,278 },279};280 281module_platform_driver(pxa2xx_ac97_driver);282 283MODULE_AUTHOR("Nicolas Pitre");284MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");285MODULE_LICENSE("GPL");286MODULE_ALIAS("platform:pxa2xx-ac97");287