ALSA: move dmaengine implementation from ASoC to ALSA core

For the PXA DMA rework, we need the generic dmaengine implementation
that currently lives in sound/soc for standalone (non-ASoC) AC'97
support.

Move it to sound/core, and rename the Kconfig symbol.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

6 files changed, 4 insertions, 378 deletions

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 45eeaa9..5138b84 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -26,12 +26,9 @@ if SND_SOC
 config SND_SOC_AC97_BUS
 	bool
 
-config SND_SOC_DMAENGINE_PCM
-	bool
-
 config SND_SOC_GENERIC_DMAENGINE_PCM
 	bool
-	select SND_SOC_DMAENGINE_PCM
+	select SND_DMAENGINE_PCM
 
 # All the supported SoCs
 source "sound/soc/atmel/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index bc02614..61a64d2 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -1,10 +1,6 @@
 snd-soc-core-objs := soc-core.o soc-dapm.o soc-jack.o soc-cache.o soc-utils.o
 snd-soc-core-objs += soc-pcm.o soc-compress.o soc-io.o
 
-ifneq ($(CONFIG_SND_SOC_DMAENGINE_PCM),)
-snd-soc-core-objs += soc-dmaengine-pcm.o
-endif
-
 ifneq ($(CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM),)
 snd-soc-core-objs += soc-generic-dmaengine-pcm.o
 endif
diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index 9f5d55e..accd0ff 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -1,7 +1,7 @@
 config SND_OMAP_SOC
 	tristate "SoC Audio for the Texas Instruments OMAP chips"
 	depends on ARCH_OMAP && DMA_OMAP
-	select SND_SOC_DMAENGINE_PCM
+	select SND_DMAENGINE_PCM
 
 config SND_OMAP_SOC_DMIC
 	tristate
diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig
index b358094..4db74a0 100644
--- a/sound/soc/pxa/Kconfig
+++ b/sound/soc/pxa/Kconfig
@@ -11,7 +11,7 @@ config SND_PXA2XX_SOC
 config SND_MMP_SOC
 	bool "Soc Audio for Marvell MMP chips"
 	depends on ARCH_MMP
-	select SND_SOC_DMAENGINE_PCM
+	select SND_DMAENGINE_PCM
 	select SND_ARM
 	help
 	  Say Y if you want to add support for codecs attached to
diff --git a/sound/soc/soc-dmaengine-pcm.c b/sound/soc/soc-dmaengine-pcm.c
deleted file mode 100644
index aa924d9..0000000
--- a/sound/soc/soc-dmaengine-pcm.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- *  Copyright (C) 2012, Analog Devices Inc.
- *	Author: Lars-Peter Clausen <lars@metafoo.de>
- *
- *  Based on:
- *	imx-pcm-dma-mx2.c, Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
- *	mxs-pcm.c, Copyright (C) 2011 Freescale Semiconductor, Inc.
- *	ep93xx-pcm.c, Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
- *		      Copyright (C) 2006 Applied Data Systems
- *
- *  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.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/dmaengine.h>
-#include <linux/slab.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <sound/dmaengine_pcm.h>
-
-struct dmaengine_pcm_runtime_data {
-	struct dma_chan *dma_chan;
-	dma_cookie_t cookie;
-
-	unsigned int pos;
-};
-
-static inline struct dmaengine_pcm_runtime_data *substream_to_prtd(
-	const struct snd_pcm_substream *substream)
-{
-	return substream->runtime->private_data;
-}
-
-struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-
-	return prtd->dma_chan;
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_chan);
-
-/**
- * snd_hwparams_to_dma_slave_config - Convert hw_params to dma_slave_config
- * @substream: PCM substream
- * @params: hw_params
- * @slave_config: DMA slave config
- *
- * This function can be used to initialize a dma_slave_config from a substream
- * and hw_params in a dmaengine based PCM driver implementation.
- */
-int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream,
-	const struct snd_pcm_hw_params *params,
-	struct dma_slave_config *slave_config)
-{
-	enum dma_slave_buswidth buswidth;
-
-	switch (params_format(params)) {
-	case SNDRV_PCM_FORMAT_S8:
-		buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
-		break;
-	case SNDRV_PCM_FORMAT_S16_LE:
-		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
-		break;
-	case SNDRV_PCM_FORMAT_S18_3LE:
-	case SNDRV_PCM_FORMAT_S20_3LE:
-	case SNDRV_PCM_FORMAT_S24_LE:
-	case SNDRV_PCM_FORMAT_S32_LE:
-		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		slave_config->direction = DMA_MEM_TO_DEV;
-		slave_config->dst_addr_width = buswidth;
-	} else {
-		slave_config->direction = DMA_DEV_TO_MEM;
-		slave_config->src_addr_width = buswidth;
-	}
-
-	slave_config->device_fc = false;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_hwparams_to_dma_slave_config);
-
-/**
- * snd_dmaengine_pcm_set_config_from_dai_data() - Initializes a dma slave config
- *  using DAI DMA data.
- * @substream: PCM substream
- * @dma_data: DAI DMA data
- * @slave_config: DMA slave configuration
- *
- * Initializes the {dst,src}_addr, {dst,src}_maxburst, {dst,src}_addr_width and
- * slave_id fields of the DMA slave config from the same fields of the DAI DMA
- * data struct. The src and dst fields will be initialized depending on the
- * direction of the substream. If the substream is a playback stream the dst
- * fields will be initialized, if it is a capture stream the src fields will be
- * initialized. The {dst,src}_addr_width field will only be initialized if the
- * addr_width field of the DAI DMA data struct is not equal to
- * DMA_SLAVE_BUSWIDTH_UNDEFINED.
- */
-void snd_dmaengine_pcm_set_config_from_dai_data(
-	const struct snd_pcm_substream *substream,
-	const struct snd_dmaengine_dai_dma_data *dma_data,
-	struct dma_slave_config *slave_config)
-{
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		slave_config->dst_addr = dma_data->addr;
-		slave_config->dst_maxburst = dma_data->maxburst;
-		if (dma_data->addr_width != DMA_SLAVE_BUSWIDTH_UNDEFINED)
-			slave_config->dst_addr_width = dma_data->addr_width;
-	} else {
-		slave_config->src_addr = dma_data->addr;
-		slave_config->src_maxburst = dma_data->maxburst;
-		if (dma_data->addr_width != DMA_SLAVE_BUSWIDTH_UNDEFINED)
-			slave_config->src_addr_width = dma_data->addr_width;
-	}
-
-	slave_config->slave_id = dma_data->slave_id;
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_set_config_from_dai_data);
-
-static void dmaengine_pcm_dma_complete(void *arg)
-{
-	struct snd_pcm_substream *substream = arg;
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-
-	prtd->pos += snd_pcm_lib_period_bytes(substream);
-	if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream))
-		prtd->pos = 0;
-
-	snd_pcm_period_elapsed(substream);
-}
-
-static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-	struct dma_chan *chan = prtd->dma_chan;
-	struct dma_async_tx_descriptor *desc;
-	enum dma_transfer_direction direction;
-	unsigned long flags = DMA_CTRL_ACK;
-
-	direction = snd_pcm_substream_to_dma_direction(substream);
-
-	if (!substream->runtime->no_period_wakeup)
-		flags |= DMA_PREP_INTERRUPT;
-
-	prtd->pos = 0;
-	desc = dmaengine_prep_dma_cyclic(chan,
-		substream->runtime->dma_addr,
-		snd_pcm_lib_buffer_bytes(substream),
-		snd_pcm_lib_period_bytes(substream), direction, flags);
-
-	if (!desc)
-		return -ENOMEM;
-
-	desc->callback = dmaengine_pcm_dma_complete;
-	desc->callback_param = substream;
-	prtd->cookie = dmaengine_submit(desc);
-
-	return 0;
-}
-
-/**
- * snd_dmaengine_pcm_trigger - dmaengine based PCM trigger implementation
- * @substream: PCM substream
- * @cmd: Trigger command
- *
- * Returns 0 on success, a negative error code otherwise.
- *
- * This function can be used as the PCM trigger callback for dmaengine based PCM
- * driver implementations.
- */
-int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-	int ret;
-
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-		ret = dmaengine_pcm_prepare_and_submit(substream);
-		if (ret)
-			return ret;
-		dma_async_issue_pending(prtd->dma_chan);
-		break;
-	case SNDRV_PCM_TRIGGER_RESUME:
-	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-		dmaengine_resume(prtd->dma_chan);
-		break;
-	case SNDRV_PCM_TRIGGER_SUSPEND:
-	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-		dmaengine_pause(prtd->dma_chan);
-		break;
-	case SNDRV_PCM_TRIGGER_STOP:
-		dmaengine_terminate_all(prtd->dma_chan);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_trigger);
-
-/**
- * snd_dmaengine_pcm_pointer_no_residue - dmaengine based PCM pointer implementation
- * @substream: PCM substream
- *
- * This function is deprecated and should not be used by new drivers, as its
- * results may be unreliable.
- */
-snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-	return bytes_to_frames(substream->runtime, prtd->pos);
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer_no_residue);
-
-/**
- * snd_dmaengine_pcm_pointer - dmaengine based PCM pointer implementation
- * @substream: PCM substream
- *
- * This function can be used as the PCM pointer callback for dmaengine based PCM
- * driver implementations.
- */
-snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-	struct dma_tx_state state;
-	enum dma_status status;
-	unsigned int buf_size;
-	unsigned int pos = 0;
-
-	status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state);
-	if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
-		buf_size = snd_pcm_lib_buffer_bytes(substream);
-		if (state.residue > 0 && state.residue <= buf_size)
-			pos = buf_size - state.residue;
-	}
-
-	return bytes_to_frames(substream->runtime, pos);
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer);
-
-/**
- * snd_dmaengine_pcm_request_channel - Request channel for the dmaengine PCM
- * @filter_fn: Filter function used to request the DMA channel
- * @filter_data: Data passed to the DMA filter function
- *
- * Returns NULL or the requested DMA channel.
- *
- * This function request a DMA channel for usage with dmaengine PCM.
- */
-struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn,
-	void *filter_data)
-{
-	dma_cap_mask_t mask;
-
-	dma_cap_zero(mask);
-	dma_cap_set(DMA_SLAVE, mask);
-	dma_cap_set(DMA_CYCLIC, mask);
-
-	return dma_request_channel(mask, filter_fn, filter_data);
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_request_channel);
-
-/**
- * snd_dmaengine_pcm_open - Open a dmaengine based PCM substream
- * @substream: PCM substream
- * @chan: DMA channel to use for data transfers
- *
- * Returns 0 on success, a negative error code otherwise.
- *
- * The function should usually be called from the pcm open callback. Note that
- * this function will use private_data field of the substream's runtime. So it
- * is not availabe to your pcm driver implementation.
- */
-int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream,
-	struct dma_chan *chan)
-{
-	struct dmaengine_pcm_runtime_data *prtd;
-	int ret;
-
-	if (!chan)
-		return -ENXIO;
-
-	ret = snd_pcm_hw_constraint_integer(substream->runtime,
-					    SNDRV_PCM_HW_PARAM_PERIODS);
-	if (ret < 0)
-		return ret;
-
-	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
-	if (!prtd)
-		return -ENOMEM;
-
-	prtd->dma_chan = chan;
-
-	substream->runtime->private_data = prtd;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open);
-
-/**
- * snd_dmaengine_pcm_open_request_chan - Open a dmaengine based PCM substream and request channel
- * @substream: PCM substream
- * @filter_fn: Filter function used to request the DMA channel
- * @filter_data: Data passed to the DMA filter function
- *
- * Returns 0 on success, a negative error code otherwise.
- *
- * This function will request a DMA channel using the passed filter function and
- * data. The function should usually be called from the pcm open callback. Note
- * that this function will use private_data field of the substream's runtime. So
- * it is not availabe to your pcm driver implementation.
- */
-int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream,
-	dma_filter_fn filter_fn, void *filter_data)
-{
-	return snd_dmaengine_pcm_open(substream,
-		    snd_dmaengine_pcm_request_channel(filter_fn, filter_data));
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open_request_chan);
-
-/**
- * snd_dmaengine_pcm_close - Close a dmaengine based PCM substream
- * @substream: PCM substream
- */
-int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-
-	kfree(prtd);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close);
-
-/**
- * snd_dmaengine_pcm_release_chan_close - Close a dmaengine based PCM substream and release channel
- * @substream: PCM substream
- *
- * Releases the DMA channel associated with the PCM substream.
- */
-int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream)
-{
-	struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream);
-
-	dma_release_channel(prtd->dma_chan);
-
-	return snd_dmaengine_pcm_close(substream);
-}
-EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close_release_chan);
-
-MODULE_LICENSE("GPL");
diff --git a/sound/soc/spear/Kconfig b/sound/soc/spear/Kconfig
index 3567d73..0a53053 100644
--- a/sound/soc/spear/Kconfig
+++ b/sound/soc/spear/Kconfig
@@ -1,6 +1,6 @@
 config SND_SPEAR_SOC
 	tristate
-	select SND_SOC_DMAENGINE_PCM
+	select SND_DMAENGINE_PCM
 
 config SND_SPEAR_SPDIF_OUT
 	tristate