// SPDX-License-Identifier: GPL-2.0-only /* * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. * * Author: Nicolas Pitre * Created: Dec 02, 2004 * Copyright: MontaVista Software Inc. */ #include <linux/init.h> #include <linux/io.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #include <sound/pxa2xx-lib.h> #include <sound/dmaengine_pcm.h> #include <linux/platform_data/asoc-pxa.h> static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97) { if (!pxa2xx_ac97_try_cold_reset()) pxa2xx_ac97_try_warm_reset(); pxa2xx_ac97_finish_reset(); } static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97, unsigned short reg) { int ret; ret = pxa2xx_ac97_read(ac97->num, reg); if (ret < 0) return 0; else return (unsigned short)(ret & 0xffff); } static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { pxa2xx_ac97_write(ac97->num, reg, val); } static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = { .read = pxa2xx_ac97_legacy_read, .write = pxa2xx_ac97_legacy_write, .reset = pxa2xx_ac97_legacy_reset, }; static struct snd_pcm *pxa2xx_ac97_pcm; static struct snd_ac97 *pxa2xx_ac97_ac97; static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; pxa2xx_audio_ops_t *platform_ops; int ret, i; ret = pxa2xx_pcm_open(substream); if (ret) return ret; runtime->hw.channels_min = 2; runtime->hw.channels_max = 2; i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? AC97_RATES_FRONT_DAC : AC97_RATES_ADC; runtime->hw.rates = pxa2xx_ac97_ac97->rates[i]; snd_pcm_limit_hw_rates(runtime); platform_ops = substream->pcm->card->dev->platform_data; if (platform_ops && platform_ops->startup) { ret = platform_ops->startup(substream, platform_ops->priv); if (ret < 0) pxa2xx_pcm_close(substream); } return ret; } static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream) { pxa2xx_audio_ops_t *platform_ops; platform_ops = substream->pcm->card->dev->platform_data; if (platform_ops && platform_ops->shutdown) platform_ops->shutdown(substream, platform_ops->priv); return 0; } static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; int ret; ret = pxa2xx_pcm_prepare(substream); if (ret < 0) return ret; return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); } static int pxa2xx_ac97_do_suspend(struct snd_card *card) { pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); snd_ac97_suspend(pxa2xx_ac97_ac97); if (platform_ops && platform_ops->suspend) platform_ops->suspend(platform_ops->priv); return pxa2xx_ac97_hw_suspend(); } static int pxa2xx_ac97_do_resume(struct snd_card *card) { pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; int rc; rc = pxa2xx_ac97_hw_resume(); if (rc) return rc; if (platform_ops && platform_ops->resume) platform_ops->resume(platform_ops->priv); snd_ac97_resume(pxa2xx_ac97_ac97); snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } static int pxa2xx_ac97_suspend(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); int ret = 0; if (card) ret = pxa2xx_ac97_do_suspend(card); return ret; } static int pxa2xx_ac97_resume(struct device *dev) { struct snd_card *card = dev_get_drvdata(dev); int ret = 0; if (card) ret = pxa2xx_ac97_do_resume(card); return ret; } static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = { .open = pxa2xx_ac97_pcm_open, .close = pxa2xx_ac97_pcm_close, .hw_params = pxa2xx_pcm_hw_params, .prepare = pxa2xx_ac97_pcm_prepare, .trigger = pxa2xx_pcm_trigger, .pointer = pxa2xx_pcm_pointer, }; static int pxa2xx_ac97_pcm_new(struct snd_card *card) { struct snd_pcm *pcm; int ret; ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm); if (ret) goto out; ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); if (ret) goto out; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops); ret = pxa2xx_pcm_preallocate_dma_buffer(pcm); if (ret) goto out; pxa2xx_ac97_pcm = pcm; ret = 0; out: return ret; } static int pxa2xx_ac97_probe(struct platform_device *dev) { struct snd_card *card; struct snd_ac97_bus *ac97_bus; struct snd_ac97_template ac97_template; int ret; pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; if (dev->id >= 0) { dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); ret = -ENXIO; goto err_dev; } ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, THIS_MODULE, 0, &card); if (ret < 0) goto err; strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); ret = pxa2xx_ac97_pcm_new(card); if (ret) goto err; ret = pxa2xx_ac97_hw_probe(dev); if (ret) goto err; ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); if (ret) goto err_remove; memset(&ac97_template, 0, sizeof(ac97_template)); ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); if (ret) goto err_remove; snprintf(card->shortname, sizeof(card->shortname), "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); snprintf(card->longname, sizeof(card->longname), "%s (%s)", dev->dev.driver->name, card->mixername); if (pdata && pdata->codec_pdata[0]) snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); ret = snd_card_register(card); if (ret == 0) { platform_set_drvdata(dev, card); return 0; } err_remove: pxa2xx_ac97_hw_remove(dev); err: if (card) snd_card_free(card); err_dev: return ret; } static void pxa2xx_ac97_remove(struct platform_device *dev) { struct snd_card *card = platform_get_drvdata(dev); if (card) { snd_card_free(card); pxa2xx_ac97_hw_remove(dev); } } static struct platform_driver pxa2xx_ac97_driver = { .probe = pxa2xx_ac97_probe, .remove_new = pxa2xx_ac97_remove, .driver = { .name = "pxa2xx-ac97", .pm = &pxa2xx_ac97_pm_ops, }, }; module_platform_driver(pxa2xx_ac97_driver); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pxa2xx-ac97");