ASoC: kirkwood: Add i2s support (f9b95980) · Commits · e / devices / android_kernel_xiaomi_markw

sound/soc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@ source "sound/soc/fsl/Kconfig"
		source "sound/soc/imx/Kconfig"
		source "sound/soc/nuc900/Kconfig"
		source "sound/soc/omap/Kconfig"
		source "sound/soc/kirkwood/Kconfig"
		source "sound/soc/pxa/Kconfig"
		source "sound/soc/s3c24xx/Kconfig"
		source "sound/soc/s6000/Kconfig"

sound/soc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,7 @@ obj-$(CONFIG_SND_SOC) += fsl/
		obj-$(CONFIG_SND_SOC) += imx/
		obj-$(CONFIG_SND_SOC) += nuc900/
		obj-$(CONFIG_SND_SOC) += omap/
		obj-$(CONFIG_SND_SOC) += kirkwood/
		obj-$(CONFIG_SND_SOC) += pxa/
		obj-$(CONFIG_SND_SOC) += s3c24xx/
		obj-$(CONFIG_SND_SOC) += s6000/

sound/soc/kirkwood/Kconfig

0 → 100644

+11 −0

Original line number	Diff line number	Diff line
		config SND_KIRKWOOD_SOC
		tristate "SoC Audio for the Marvell Kirkwood chip"
		depends on ARCH_KIRKWOOD
		help
		Say Y or M if you want to add support for codecs attached to
		the Kirkwood I2S interface. You will also need to select the
		audio interfaces to support below.

		config SND_KIRKWOOD_SOC_I2S
		tristate

sound/soc/kirkwood/Makefile

0 → 100644

+6 −0

Original line number	Diff line number	Diff line
		snd-soc-kirkwood-objs := kirkwood-dma.o
		snd-soc-kirkwood-i2s-objs := kirkwood-i2s.o

		obj-$(CONFIG_SND_KIRKWOOD_SOC) += snd-soc-kirkwood.o
		obj-$(CONFIG_SND_KIRKWOOD_SOC_I2S) += snd-soc-kirkwood-i2s.o

sound/soc/kirkwood/kirkwood-dma.c

0 → 100644

+383 −0

Original line number	Diff line number	Diff line
		/*
		* kirkwood-dma.c
		*
		* (c) 2010 Arnaud Patard <apatard@mandriva.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the
		* Free Software Foundation; either version 2 of the License, or (at your
		* option) any later version.
		*/

		#include <linux/init.h>
		#include <linux/module.h>
		#include <linux/device.h>
		#include <linux/io.h>
		#include <linux/slab.h>
		#include <linux/interrupt.h>
		#include <linux/dma-mapping.h>
		#include <linux/mbus.h>
		#include <sound/soc.h>
		#include "kirkwood-dma.h"
		#include "kirkwood.h"

		#define KIRKWOOD_RATES \
		(SNDRV_PCM_RATE_44100 \| \
		SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000)
		#define KIRKWOOD_FORMATS \
		(SNDRV_PCM_FMTBIT_S16_LE \| \
		SNDRV_PCM_FMTBIT_S24_LE \| \
		SNDRV_PCM_FMTBIT_S32_LE)

		struct kirkwood_dma_priv {
		struct snd_pcm_substream *play_stream;
		struct snd_pcm_substream *rec_stream;
		struct kirkwood_dma_data *data;
		};

		static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
		.info = (SNDRV_PCM_INFO_INTERLEAVED \|
		SNDRV_PCM_INFO_MMAP \|
		SNDRV_PCM_INFO_MMAP_VALID \|
		SNDRV_PCM_INFO_BLOCK_TRANSFER \|
		SNDRV_PCM_INFO_PAUSE),
		.formats = KIRKWOOD_FORMATS,
		.rates = KIRKWOOD_RATES,
		.rate_min = 44100,
		.rate_max = 96000,
		.channels_min = 1,
		.channels_max = 2,
		.buffer_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES * KIRKWOOD_SND_MAX_PERIODS,
		.period_bytes_min = KIRKWOOD_SND_MIN_PERIOD_BYTES,
		.period_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES,
		.periods_min = KIRKWOOD_SND_MIN_PERIODS,
		.periods_max = KIRKWOOD_SND_MAX_PERIODS,
		.fifo_size = 0,
		};

		static u64 kirkwood_dma_dmamask = 0xFFFFFFFFUL;

		static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
		{
		struct kirkwood_dma_priv *prdata = dev_id;
		struct kirkwood_dma_data *priv = prdata->data;
		unsigned long mask, status, cause;

		mask = readl(priv->io + KIRKWOOD_INT_MASK);
		status = readl(priv->io + KIRKWOOD_INT_CAUSE) & mask;

		cause = readl(priv->io + KIRKWOOD_ERR_CAUSE);
		if (unlikely(cause)) {
		printk(KERN_WARNING "%s: got err interrupt 0x%lx\n",
		__func__, cause);
		writel(cause, priv->io + KIRKWOOD_ERR_CAUSE);
		return IRQ_HANDLED;
		}

		/* we've enabled only bytes interrupts ... */
		if (status & ~(KIRKWOOD_INT_CAUSE_PLAY_BYTES \| \
		KIRKWOOD_INT_CAUSE_REC_BYTES)) {
		printk(KERN_WARNING "%s: unexpected interrupt %lx\n",
		__func__, status);
		return IRQ_NONE;
		}

		/* ack int */
		writel(status, priv->io + KIRKWOOD_INT_CAUSE);

		if (status & KIRKWOOD_INT_CAUSE_PLAY_BYTES)
		snd_pcm_period_elapsed(prdata->play_stream);

		if (status & KIRKWOOD_INT_CAUSE_REC_BYTES)
		snd_pcm_period_elapsed(prdata->rec_stream);

		return IRQ_HANDLED;
		}

		static void kirkwood_dma_conf_mbus_windows(void __iomem *base, int win,
		unsigned long dma,
		struct mbus_dram_target_info *dram)
		{
		int i;

		/* First disable and clear windows */
		writel(0, base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
		writel(0, base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));

		/* try to find matching cs for current dma address */
		for (i = 0; i < dram->num_cs; i++) {
		struct mbus_dram_window *cs = dram->cs + i;
		if ((cs->base & 0xffff0000) < (dma & 0xffff0000)) {
		writel(cs->base & 0xffff0000,
		base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));
		writel(((cs->size - 1) & 0xffff0000) \|
		(cs->mbus_attr << 8) \|
		(dram->mbus_dram_target_id << 4) \| 1,
		base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
		}
		}
		}

		static int kirkwood_dma_open(struct snd_pcm_substream *substream)
		{
		int err;
		struct snd_pcm_runtime *runtime = substream->runtime;
		struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
		struct snd_soc_dai *cpu_dai = soc_runtime->dai->cpu_dai;
		struct kirkwood_dma_data *priv;
		struct kirkwood_dma_priv *prdata = cpu_dai->private_data;
		unsigned long addr;

		priv = snd_soc_dai_get_dma_data(cpu_dai, substream);
		snd_soc_set_runtime_hwparams(substream, &kirkwood_dma_snd_hw);

		/* Ensure that all constraints linked to dma burst are fullfilled */
		err = snd_pcm_hw_constraint_minmax(runtime,
		SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
		priv->burst * 2,
		KIRKWOOD_AUDIO_BUF_MAX-1);
		if (err < 0)
		return err;

		err = snd_pcm_hw_constraint_step(runtime, 0,
		SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
		priv->burst);
		if (err < 0)
		return err;

		err = snd_pcm_hw_constraint_step(substream->runtime, 0,
		SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
		priv->burst);
		if (err < 0)
		return err;

		if (soc_runtime->dai->cpu_dai->private_data == NULL) {
		prdata = kzalloc(sizeof(struct kirkwood_dma_priv), GFP_KERNEL);
		if (prdata == NULL)
		return -ENOMEM;

		prdata->data = priv;

		err = request_irq(priv->irq, kirkwood_dma_irq, IRQF_SHARED,
		"kirkwood-i2s", prdata);
		if (err) {
		kfree(prdata);
		return -EBUSY;
		}

		soc_runtime->dai->cpu_dai->private_data = prdata;

		/*
		* Enable Error interrupts. We're only ack'ing them but
		* it's usefull for diagnostics
		*/
		writel((unsigned long)-1, priv->io + KIRKWOOD_ERR_MASK);
		}

		addr = virt_to_phys(substream->dma_buffer.area);
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		prdata->play_stream = substream;
		kirkwood_dma_conf_mbus_windows(priv->io,
		KIRKWOOD_PLAYBACK_WIN, addr, priv->dram);
		} else {
		prdata->rec_stream = substream;
		kirkwood_dma_conf_mbus_windows(priv->io,
		KIRKWOOD_RECORD_WIN, addr, priv->dram);
		}

		return 0;
		}

		static int kirkwood_dma_close(struct snd_pcm_substream *substream)
		{
		struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
		struct snd_soc_dai *cpu_dai = soc_runtime->dai->cpu_dai;
		struct kirkwood_dma_priv *prdata = cpu_dai->private_data;
		struct kirkwood_dma_data *priv;

		priv = snd_soc_dai_get_dma_data(cpu_dai, substream);

		if (!prdata \|\| !priv)
		return 0;

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		prdata->play_stream = NULL;
		else
		prdata->rec_stream = NULL;

		if (!prdata->play_stream && !prdata->rec_stream) {
		writel(0, priv->io + KIRKWOOD_ERR_MASK);
		free_irq(priv->irq, prdata);
		kfree(prdata);
		soc_runtime->dai->cpu_dai->private_data = NULL;
		}

		return 0;
		}

		static int kirkwood_dma_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
		{
		struct snd_pcm_runtime *runtime = substream->runtime;

		snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
		runtime->dma_bytes = params_buffer_bytes(params);

		return 0;
		}

		static int kirkwood_dma_hw_free(struct snd_pcm_substream *substream)
		{
		snd_pcm_set_runtime_buffer(substream, NULL);
		return 0;
		}

		static int kirkwood_dma_prepare(struct snd_pcm_substream *substream)
		{
		struct snd_pcm_runtime *runtime = substream->runtime;
		struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
		struct snd_soc_dai *cpu_dai = soc_runtime->dai->cpu_dai;
		struct kirkwood_dma_data *priv;
		unsigned long size, count;

		priv = snd_soc_dai_get_dma_data(cpu_dai, substream);

		/* compute buffer size in term of "words" as requested in specs */
		size = frames_to_bytes(runtime, runtime->buffer_size);
		size = (size>>2)-1;
		count = snd_pcm_lib_period_bytes(substream);

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		writel(count, priv->io + KIRKWOOD_PLAY_BYTE_INT_COUNT);
		writel(runtime->dma_addr, priv->io + KIRKWOOD_PLAY_BUF_ADDR);
		writel(size, priv->io + KIRKWOOD_PLAY_BUF_SIZE);
		} else {
		writel(count, priv->io + KIRKWOOD_REC_BYTE_INT_COUNT);
		writel(runtime->dma_addr, priv->io + KIRKWOOD_REC_BUF_ADDR);
		writel(size, priv->io + KIRKWOOD_REC_BUF_SIZE);
		}


		return 0;
		}

		static snd_pcm_uframes_t kirkwood_dma_pointer(struct snd_pcm_substream
		*substream)
		{
		struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
		struct snd_soc_dai *cpu_dai = soc_runtime->dai->cpu_dai;
		struct kirkwood_dma_data *priv;
		snd_pcm_uframes_t count;

		priv = snd_soc_dai_get_dma_data(cpu_dai, substream);

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		count = bytes_to_frames(substream->runtime,
		readl(priv->io + KIRKWOOD_PLAY_BYTE_COUNT));
		else
		count = bytes_to_frames(substream->runtime,
		readl(priv->io + KIRKWOOD_REC_BYTE_COUNT));

		return count;
		}

		struct snd_pcm_ops kirkwood_dma_ops = {
		.open = kirkwood_dma_open,
		.close = kirkwood_dma_close,
		.ioctl = snd_pcm_lib_ioctl,
		.hw_params = kirkwood_dma_hw_params,
		.hw_free = kirkwood_dma_hw_free,
		.prepare = kirkwood_dma_prepare,
		.pointer = kirkwood_dma_pointer,
		};

		static int kirkwood_dma_preallocate_dma_buffer(struct snd_pcm *pcm,
		int stream)
		{
		struct snd_pcm_substream *substream = pcm->streams[stream].substream;
		struct snd_dma_buffer *buf = &substream->dma_buffer;
		size_t size = kirkwood_dma_snd_hw.buffer_bytes_max;

		buf->dev.type = SNDRV_DMA_TYPE_DEV;
		buf->dev.dev = pcm->card->dev;
		buf->area = dma_alloc_coherent(pcm->card->dev, size,
		&buf->addr, GFP_KERNEL);
		if (!buf->area)
		return -ENOMEM;
		buf->bytes = size;
		buf->private_data = NULL;

		return 0;
		}

		static int kirkwood_dma_new(struct snd_card *card,
		struct snd_soc_dai dai, struct snd_pcm pcm)
		{
		int ret;

		if (!card->dev->dma_mask)
		card->dev->dma_mask = &kirkwood_dma_dmamask;
		if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = 0xffffffff;

		if (dai->playback.channels_min) {
		ret = kirkwood_dma_preallocate_dma_buffer(pcm,
		SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
		return ret;
		}

		if (dai->capture.channels_min) {
		ret = kirkwood_dma_preallocate_dma_buffer(pcm,
		SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
		return ret;
		}

		return 0;
		}

		static void kirkwood_dma_free_dma_buffers(struct snd_pcm *pcm)
		{
		struct snd_pcm_substream *substream;
		struct snd_dma_buffer *buf;
		int stream;

		for (stream = 0; stream < 2; stream++) {
		substream = pcm->streams[stream].substream;
		if (!substream)
		continue;
		buf = &substream->dma_buffer;
		if (!buf->area)
		continue;

		dma_free_coherent(pcm->card->dev, buf->bytes,
		buf->area, buf->addr);
		buf->area = NULL;
		}
		}

		struct snd_soc_platform kirkwood_soc_platform = {
		.name = "kirkwood-dma",
		.pcm_ops = &kirkwood_dma_ops,
		.pcm_new = kirkwood_dma_new,
		.pcm_free = kirkwood_dma_free_dma_buffers,
		};
		EXPORT_SYMBOL_GPL(kirkwood_soc_platform);

		static int __init kirkwood_soc_platform_init(void)
		{
		return snd_soc_register_platform(&kirkwood_soc_platform);
		}
		module_init(kirkwood_soc_platform_init);

		static void __exit kirkwood_soc_platform_exit(void)
		{
		snd_soc_unregister_platform(&kirkwood_soc_platform);
		}
		module_exit(kirkwood_soc_platform_exit);

		MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
		MODULE_DESCRIPTION("Marvell Kirkwood Audio DMA module");
		MODULE_LICENSE("GPL");