From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c | 288 ---------------------------- 1 file changed, 288 deletions(-) delete mode 100644 ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c (limited to 'ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c') diff --git a/ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c b/ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c deleted file mode 100644 index 47569523..00000000 --- a/ANDROID_3.4.5/sound/soc/soc-dmaengine-pcm.c +++ /dev/null @@ -1,288 +0,0 @@ -/* - * Copyright (C) 2012, Analog Devices Inc. - * Author: Lars-Peter Clausen - * - * Based on: - * imx-pcm-dma-mx2.c, Copyright 2009 Sascha Hauer - * mxs-pcm.c, Copyright (C) 2011 Freescale Semiconductor, Inc. - * ep93xx-pcm.c, Copyright (C) 2006 Lennert Buytenhek - * 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 -#include -#include -#include -#include -#include -#include - -#include - -struct dmaengine_pcm_runtime_data { - struct dma_chan *dma_chan; - - unsigned int pos; - - void *data; -}; - -static inline struct dmaengine_pcm_runtime_data *substream_to_prtd( - const struct snd_pcm_substream *substream) -{ - return substream->runtime->private_data; -} - -/** - * snd_dmaengine_pcm_set_data - Set dmaengine substream private data - * @substream: PCM substream - * @data: Data to set - */ -void snd_dmaengine_pcm_set_data(struct snd_pcm_substream *substream, void *data) -{ - struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); - - prtd->data = data; -} -EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_set_data); - -/** - * snd_dmaengine_pcm_get_data - Get dmaeinge substream private data - * @substream: PCM substream - * - * Returns the data previously set with snd_dmaengine_pcm_set_data - */ -void *snd_dmaengine_pcm_get_data(struct snd_pcm_substream *substream) -{ - struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); - - return prtd->data; -} -EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_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; - } - - return 0; -} -EXPORT_SYMBOL_GPL(snd_hwparams_to_dma_slave_config); - -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; - - direction = snd_pcm_substream_to_dma_direction(substream); - - 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); - - if (!desc) - return -ENOMEM; - - desc->callback = dmaengine_pcm_dma_complete; - desc->callback_param = substream; - 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 - 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); - return bytes_to_frames(substream->runtime, prtd->pos); -} -EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer); - -static int dmaengine_pcm_request_channel(struct dmaengine_pcm_runtime_data *prtd, - 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); - prtd->dma_chan = dma_request_channel(mask, filter_fn, filter_data); - - if (!prtd->dma_chan) - return -ENXIO; - - return 0; -} - -/** - * snd_dmaengine_pcm_open - Open a dmaengine based PCM substream - * @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. If you need - * to keep additional data attached to a substream use - * snd_dmaeinge_pcm_{set,get}_data. - */ -int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, - dma_filter_fn filter_fn, void *filter_data) -{ - struct dmaengine_pcm_runtime_data *prtd; - int ret; - - 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; - - ret = dmaengine_pcm_request_channel(prtd, filter_fn, filter_data); - if (ret < 0) { - kfree(prtd); - return ret; - } - - substream->runtime->private_data = prtd; - - return 0; -} -EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open); - -/** - * 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); - - dma_release_channel(prtd->dma_chan); - kfree(prtd); - - return 0; -} -EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close); -- cgit