--- /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/ac97_codec.h>
+#include <sound/soc.h>
+#include <sound/pxa2xx-lib.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-ac97.h>
+#include <mach/audio.h>
+
+#include "pxa2xx-ac97.h"
+
+static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+ pxa2xx_ac97_try_warm_reset(ac97);
+
+ pxa2xx_ac97_finish_reset(ac97);
+}
+
+static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
+{
+ pxa2xx_ac97_try_cold_reset(ac97);
+
+ pxa2xx_ac97_finish_reset(ac97);
+}
+
+static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
+ .read = pxa2xx_ac97_read,
+ .write = pxa2xx_ac97_write,
+ .warm_reset = pxa2xx_ac97_warm_reset,
+ .reset = pxa2xx_ac97_cold_reset,
+};
+
+static unsigned long pxa2xx_ac97_pcm_stereo_in_req = 12;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
+ .addr = __PREG(PCDR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+ .maxburst = 32,
+ .filter_data = &pxa2xx_ac97_pcm_stereo_in_req,
+};
+
+static unsigned long pxa2xx_ac97_pcm_stereo_out_req = 11;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
+ .addr = __PREG(PCDR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+ .maxburst = 32,
+ .filter_data = &pxa2xx_ac97_pcm_stereo_out_req,
+};
+
+static unsigned long pxa2xx_ac97_pcm_aux_mono_out_req = 10;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
+ .addr = __PREG(MODR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
+ .maxburst = 16,
+ .filter_data = &pxa2xx_ac97_pcm_aux_mono_out_req,
+};
+
+static unsigned long pxa2xx_ac97_pcm_aux_mono_in_req = 9;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
+ .addr = __PREG(MODR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
+ .maxburst = 16,
+ .filter_data = &pxa2xx_ac97_pcm_aux_mono_in_req,
+};
+
+static unsigned long pxa2xx_ac97_pcm_aux_mic_mono_req = 8;
+static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
+ .addr = __PREG(MCDR),
+ .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
+ .maxburst = 16,
+ .filter_data = &pxa2xx_ac97_pcm_aux_mic_mono_req,
+};
+
+static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_data = &pxa2xx_ac97_pcm_stereo_out;
+ else
+ dma_data = &pxa2xx_ac97_pcm_stereo_in;
+
+ snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+
+ return 0;
+}
+
+static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
+ else
+ dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
+
+ snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+
+ return 0;
+}
+
+static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ return -ENODEV;
+ else
+ snd_soc_dai_set_dma_data(cpu_dai, substream,
+ &pxa2xx_ac97_pcm_mic_mono_in);
+
+ return 0;
+}
+
+#define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000)
+
+static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
+ .hw_params = pxa2xx_ac97_hw_params,
+};
+
+static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
+ .hw_params = pxa2xx_ac97_hw_aux_params,
+};
+
+static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
+ .hw_params = pxa2xx_ac97_hw_mic_params,
+};
+
+/*
+ * There is only 1 physical AC97 interface for pxa2xx, but it
+ * has extra fifo's that can be used for aux DACs and ADCs.
+ */
+static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
+{
+ .name = "pxa2xx-ac97",
+ .bus_control = true,
+ .playback = {
+ .stream_name = "AC97 Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = PXA2XX_AC97_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .capture = {
+ .stream_name = "AC97 Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = PXA2XX_AC97_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .ops = &pxa_ac97_hifi_dai_ops,
+},
+{
+ .name = "pxa2xx-ac97-aux",
+ .bus_control = true,
+ .playback = {
+ .stream_name = "AC97 Aux Playback",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = PXA2XX_AC97_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .capture = {
+ .stream_name = "AC97 Aux Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = PXA2XX_AC97_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .ops = &pxa_ac97_aux_dai_ops,
+},
+{
+ .name = "pxa2xx-ac97-mic",
+ .bus_control = true,
+ .capture = {
+ .stream_name = "AC97 Mic Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = PXA2XX_AC97_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+ .ops = &pxa_ac97_mic_dai_ops,
+},
+};
+
+static const struct snd_soc_component_driver pxa_ac97_component = {
+ .name = "pxa-ac97",
+};
+
+static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ if (pdev->id != -1) {
+ dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
+ return -ENXIO;
+ }
+
+ ret = pxa2xx_ac97_hw_probe(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
+ if (ret != 0)
+ return ret;
+
+ /* Punt most of the init to the SoC probe; we may need the machine
+ * driver to do interesting things with the clocking to get us up
+ * and running.
+ */
+ return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
+ pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
+}
+
+static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_component(&pdev->dev);
+ snd_soc_set_ac97_ops(NULL);
+ pxa2xx_ac97_hw_remove(pdev);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int pxa2xx_ac97_dev_suspend(struct device *dev)
+{
+ return pxa2xx_ac97_hw_suspend();
+}
+
+static int pxa2xx_ac97_dev_resume(struct device *dev)
+{
+ return pxa2xx_ac97_hw_resume();
+}
+
+static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
+ pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
+#endif
+
+static struct platform_driver pxa2xx_ac97_driver = {
+ .probe = pxa2xx_ac97_dev_probe,
+ .remove = pxa2xx_ac97_dev_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");
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