--- zzzz-none-000/linux-3.10.107/sound/soc/spear/spear_pcm.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/sound/soc/spear/spear_pcm.c 2021-02-04 17:41:59.000000000 +0000 @@ -4,7 +4,7 @@ * sound/soc/spear/spear_pcm.c * * Copyright (C) 2012 ST Microelectronics - * Rajeev Kumar + * Rajeev Kumar * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any @@ -13,19 +13,14 @@ #include #include -#include -#include #include -#include -#include -#include #include #include -#include #include #include +#include "spear_pcm.h" -static struct snd_pcm_hardware spear_pcm_hardware = { +static const struct snd_pcm_hardware spear_pcm_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), @@ -37,165 +32,24 @@ .fifo_size = 0, /* fifo size in bytes */ }; -static int spear_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - - return 0; -} - -static int spear_pcm_hw_free(struct snd_pcm_substream *substream) -{ - snd_pcm_set_runtime_buffer(substream, NULL); - - return 0; -} - -static int spear_pcm_open(struct snd_pcm_substream *substream) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - - struct spear_dma_data *dma_data = (struct spear_dma_data *) - snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - int ret; - - ret = snd_soc_set_runtime_hwparams(substream, &spear_pcm_hardware); - if (ret) - return ret; - - return snd_dmaengine_pcm_open_request_chan(substream, dma_data->filter, - dma_data); -} - -static int spear_pcm_mmap(struct snd_pcm_substream *substream, - struct vm_area_struct *vma) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - - return dma_mmap_writecombine(substream->pcm->card->dev, vma, - runtime->dma_area, runtime->dma_addr, - runtime->dma_bytes); -} - -static struct snd_pcm_ops spear_pcm_ops = { - .open = spear_pcm_open, - .close = snd_dmaengine_pcm_close_release_chan, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = spear_pcm_hw_params, - .hw_free = spear_pcm_hw_free, - .trigger = snd_dmaengine_pcm_trigger, - .pointer = snd_dmaengine_pcm_pointer, - .mmap = spear_pcm_mmap, -}; - -static int -spear_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream, - size_t size) -{ - struct snd_pcm_substream *substream = pcm->streams[stream].substream; - struct snd_dma_buffer *buf = &substream->dma_buffer; - - buf->dev.type = SNDRV_DMA_TYPE_DEV; - buf->dev.dev = pcm->card->dev; - buf->private_data = NULL; - - buf->area = dma_alloc_writecombine(pcm->card->dev, size, - &buf->addr, GFP_KERNEL); - if (!buf->area) - return -ENOMEM; - - dev_info(buf->dev.dev, - " preallocate_dma_buffer: area=%p, addr=%p, size=%d\n", - (void *)buf->area, (void *)buf->addr, size); - - buf->bytes = size; - return 0; -} - -static void spear_pcm_free(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 || !buf->area) - continue; - - dma_free_writecombine(pcm->card->dev, buf->bytes, - buf->area, buf->addr); - buf->area = NULL; - } -} - -static u64 spear_pcm_dmamask = DMA_BIT_MASK(32); - -static int spear_pcm_new(struct snd_soc_pcm_runtime *rtd) -{ - struct snd_card *card = rtd->card->snd_card; - int ret; - - if (!card->dev->dma_mask) - card->dev->dma_mask = &spear_pcm_dmamask; - if (!card->dev->coherent_dma_mask) - card->dev->coherent_dma_mask = DMA_BIT_MASK(32); - - if (rtd->cpu_dai->driver->playback.channels_min) { - ret = spear_pcm_preallocate_dma_buffer(rtd->pcm, - SNDRV_PCM_STREAM_PLAYBACK, - spear_pcm_hardware.buffer_bytes_max); - if (ret) - return ret; - } - - if (rtd->cpu_dai->driver->capture.channels_min) { - ret = spear_pcm_preallocate_dma_buffer(rtd->pcm, - SNDRV_PCM_STREAM_CAPTURE, - spear_pcm_hardware.buffer_bytes_max); - if (ret) - return ret; - } - - return 0; -} - -static struct snd_soc_platform_driver spear_soc_platform = { - .ops = &spear_pcm_ops, - .pcm_new = spear_pcm_new, - .pcm_free = spear_pcm_free, +static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = { + .pcm_hardware = &spear_pcm_hardware, + .prealloc_buffer_size = 16 * 1024, }; -static int spear_soc_platform_probe(struct platform_device *pdev) -{ - return snd_soc_register_platform(&pdev->dev, &spear_soc_platform); -} - -static int spear_soc_platform_remove(struct platform_device *pdev) +int devm_spear_pcm_platform_register(struct device *dev, + struct snd_dmaengine_pcm_config *config, + bool (*filter)(struct dma_chan *chan, void *slave)) { - snd_soc_unregister_platform(&pdev->dev); + *config = spear_dmaengine_pcm_config; + config->compat_filter_fn = filter; - return 0; + return devm_snd_dmaengine_pcm_register(dev, config, + SND_DMAENGINE_PCM_FLAG_NO_DT | + SND_DMAENGINE_PCM_FLAG_COMPAT); } +EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register); -static struct platform_driver spear_pcm_driver = { - .driver = { - .name = "spear-pcm-audio", - .owner = THIS_MODULE, - }, - - .probe = spear_soc_platform_probe, - .remove = spear_soc_platform_remove, -}; - -module_platform_driver(spear_pcm_driver); - -MODULE_AUTHOR("Rajeev Kumar "); +MODULE_AUTHOR("Rajeev Kumar "); MODULE_DESCRIPTION("SPEAr PCM DMA module"); MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:spear-pcm-audio");