diff options
Diffstat (limited to 'sound/soc/imx/imx-pcm-dma-mx2.c')
| -rw-r--r-- | sound/soc/imx/imx-pcm-dma-mx2.c | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c deleted file mode 100644 index 5780c9b9d56..00000000000 --- a/sound/soc/imx/imx-pcm-dma-mx2.c +++ /dev/null @@ -1,333 +0,0 @@ -/* - * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer - * - * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> - * - * This code is based on code copyrighted by Freescale, - * Liam Girdwood, Javier Martin and probably others. - * - * 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/clk.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/dmaengine.h> - -#include <sound/core.h> -#include <sound/initval.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/soc.h> - -#include <mach/dma.h> - -#include "imx-ssi.h" - -struct imx_pcm_runtime_data { - int period_bytes; - int periods; - int dma; - unsigned long offset; - unsigned long size; - void *buf; - int period_time; - struct dma_async_tx_descriptor *desc; - struct dma_chan *dma_chan; - struct imx_dma_data dma_data; -}; - -static void audio_dma_irq(void *data) -{ - struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data; - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - - iprtd->offset += iprtd->period_bytes; - iprtd->offset %= iprtd->period_bytes * iprtd->periods; - - snd_pcm_period_elapsed(substream); -} - -static bool filter(struct dma_chan *chan, void *param) -{ - struct imx_pcm_runtime_data *iprtd = param; - - if (!imx_dma_is_general_purpose(chan)) - return false; - - chan->private = &iprtd->dma_data; - - return true; -} - -static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct imx_pcm_dma_params *dma_params; - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - struct dma_slave_config slave_config; - dma_cap_mask_t mask; - enum dma_slave_buswidth buswidth; - int ret; - - dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - - iprtd->dma_data.peripheral_type = IMX_DMATYPE_SSI; - iprtd->dma_data.priority = DMA_PRIO_HIGH; - iprtd->dma_data.dma_request = dma_params->dma; - - /* Try to grab a DMA channel */ - if (!iprtd->dma_chan) { - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - iprtd->dma_chan = dma_request_channel(mask, filter, iprtd); - if (!iprtd->dma_chan) - return -EINVAL; - } - - switch (params_format(params)) { - case SNDRV_PCM_FORMAT_S16_LE: - buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; - break; - case SNDRV_PCM_FORMAT_S20_3LE: - case SNDRV_PCM_FORMAT_S24_LE: - buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; - break; - default: - return 0; - } - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - slave_config.direction = DMA_MEM_TO_DEV; - slave_config.dst_addr = dma_params->dma_addr; - slave_config.dst_addr_width = buswidth; - slave_config.dst_maxburst = dma_params->burstsize; - } else { - slave_config.direction = DMA_DEV_TO_MEM; - slave_config.src_addr = dma_params->dma_addr; - slave_config.src_addr_width = buswidth; - slave_config.src_maxburst = dma_params->burstsize; - } - - ret = dmaengine_slave_config(iprtd->dma_chan, &slave_config); - if (ret) - return ret; - - return 0; -} - -static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - unsigned long dma_addr; - struct dma_chan *chan; - struct imx_pcm_dma_params *dma_params; - int ret; - - dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - ret = imx_ssi_dma_alloc(substream, params); - if (ret) - return ret; - chan = iprtd->dma_chan; - - iprtd->size = params_buffer_bytes(params); - iprtd->periods = params_periods(params); - iprtd->period_bytes = params_period_bytes(params); - iprtd->offset = 0; - iprtd->period_time = HZ / (params_rate(params) / - params_period_size(params)); - - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - - dma_addr = runtime->dma_addr; - - iprtd->buf = (unsigned int *)substream->dma_buffer.area; - - iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr, - iprtd->period_bytes * iprtd->periods, - iprtd->period_bytes, - substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? - DMA_MEM_TO_DEV : DMA_DEV_TO_MEM); - if (!iprtd->desc) { - dev_err(&chan->dev->device, "cannot prepare slave dma\n"); - return -EINVAL; - } - - iprtd->desc->callback = audio_dma_irq; - iprtd->desc->callback_param = substream; - - return 0; -} - -static int snd_imx_pcm_hw_free(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - - if (iprtd->dma_chan) { - dma_release_channel(iprtd->dma_chan); - iprtd->dma_chan = NULL; - } - - return 0; -} - -static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct imx_pcm_dma_params *dma_params; - - dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - - return 0; -} - -static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - dmaengine_submit(iprtd->desc); - - break; - - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - dmaengine_terminate_all(iprtd->dma_chan); - - break; - default: - return -EINVAL; - } - - return 0; -} - -static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - - pr_debug("%s: %ld %ld\n", __func__, iprtd->offset, - bytes_to_frames(substream->runtime, iprtd->offset)); - - return bytes_to_frames(substream->runtime, iprtd->offset); -} - -static struct snd_pcm_hardware snd_imx_hardware = { - .info = SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_RESUME, - .formats = SNDRV_PCM_FMTBIT_S16_LE, - .rate_min = 8000, - .channels_min = 2, - .channels_max = 2, - .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, - .period_bytes_min = 128, - .period_bytes_max = 65535, /* Limited by SDMA engine */ - .periods_min = 2, - .periods_max = 255, - .fifo_size = 0, -}; - -static int snd_imx_open(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd; - int ret; - - iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL); - if (iprtd == NULL) - return -ENOMEM; - runtime->private_data = iprtd; - - ret = snd_pcm_hw_constraint_integer(substream->runtime, - SNDRV_PCM_HW_PARAM_PERIODS); - if (ret < 0) { - kfree(iprtd); - return ret; - } - - snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); - - return 0; -} - -static int snd_imx_close(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct imx_pcm_runtime_data *iprtd = runtime->private_data; - - kfree(iprtd); - - return 0; -} - -static struct snd_pcm_ops imx_pcm_ops = { - .open = snd_imx_open, - .close = snd_imx_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = snd_imx_pcm_hw_params, - .hw_free = snd_imx_pcm_hw_free, - .prepare = snd_imx_pcm_prepare, - .trigger = snd_imx_pcm_trigger, - .pointer = snd_imx_pcm_pointer, - .mmap = snd_imx_pcm_mmap, -}; - -static struct snd_soc_platform_driver imx_soc_platform_mx2 = { - .ops = &imx_pcm_ops, - .pcm_new = imx_pcm_new, - .pcm_free = imx_pcm_free, -}; - -static int __devinit imx_soc_platform_probe(struct platform_device *pdev) -{ - struct imx_ssi *ssi = platform_get_drvdata(pdev); - - ssi->dma_params_tx.burstsize = 6; - ssi->dma_params_rx.burstsize = 4; - - return snd_soc_register_platform(&pdev->dev, &imx_soc_platform_mx2); -} - -static int __devexit imx_soc_platform_remove(struct platform_device *pdev) -{ - snd_soc_unregister_platform(&pdev->dev); - return 0; -} - -static struct platform_driver imx_pcm_driver = { - .driver = { - .name = "imx-pcm-audio", - .owner = THIS_MODULE, - }, - .probe = imx_soc_platform_probe, - .remove = __devexit_p(imx_soc_platform_remove), -}; - -module_platform_driver(imx_pcm_driver); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:imx-pcm-audio"); |