--- /dev/null
+/*
+ * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
+ *
+ * Author: Nicolas Pitre
+ * Created: Dec 02, 2004
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.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 <mach/regs-ac97.h>
+#include <mach/audio.h>
+
+#include "pxa2xx-pcm.h"
+
+static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
+{
+ if (!pxa2xx_ac97_try_cold_reset(ac97)) {
+ pxa2xx_ac97_try_warm_reset(ac97);
+ }
+
+ pxa2xx_ac97_finish_reset(ac97);
+}
+
+static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
+ .read = pxa2xx_ac97_read,
+ .write = pxa2xx_ac97_write,
+ .reset = pxa2xx_ac97_reset,
+};
+
+static unsigned long pxa2xx_ac97_pcm_out_req = 12;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
+ .addr = __PREG(PCDR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+ .maxburst = 32,
+ .filter_data = &pxa2xx_ac97_pcm_out_req,
+};
+
+static unsigned long pxa2xx_ac97_pcm_in_req = 11;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
+ .addr = __PREG(PCDR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+ .maxburst = 32,
+ .filter_data = &pxa2xx_ac97_pcm_in_req,
+};
+
+static struct snd_pcm *pxa2xx_ac97_pcm;
+static struct snd_ac97 *pxa2xx_ac97_ac97;
+
+static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ pxa2xx_audio_ops_t *platform_ops;
+ int r;
+
+ runtime->hw.channels_min = 2;
+ runtime->hw.channels_max = 2;
+
+ r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
+ runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
+ snd_pcm_limit_hw_rates(runtime);
+
+ platform_ops = substream->pcm->card->dev->platform_data;
+ if (platform_ops && platform_ops->startup)
+ return platform_ops->startup(substream, platform_ops->priv);
+ else
+ return 0;
+}
+
+static void pxa2xx_ac97_pcm_shutdown(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);
+}
+
+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;
+ return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
+}
+
+static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
+ .playback_params = &pxa2xx_ac97_pcm_out,
+ .capture_params = &pxa2xx_ac97_pcm_in,
+ .startup = pxa2xx_ac97_pcm_startup,
+ .shutdown = pxa2xx_ac97_pcm_shutdown,
+ .prepare = pxa2xx_ac97_pcm_prepare,
+};
+
+#ifdef CONFIG_PM_SLEEP
+
+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_pcm_suspend_all(pxa2xx_ac97_pcm);
+ 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 SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
+#endif
+
+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;
+
+ strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
+
+ ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
+ 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 int 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);
+ }
+
+ return 0;
+}
+
+static struct platform_driver pxa2xx_ac97_driver = {
+ .probe = pxa2xx_ac97_probe,
+ .remove = pxa2xx_ac97_remove,
+ .driver = {
+ .name = "pxa2xx-ac97",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &pxa2xx_ac97_pm_ops,
+#endif
+ },
+};
+
+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");
Code Review / kvmfornfv.git / blobdiff