diff options
Diffstat (limited to 'sound/soc/fsl/fsl_dma.c')
| -rw-r--r-- | sound/soc/fsl/fsl_dma.c | 164 |
1 files changed, 54 insertions, 110 deletions
diff --git a/sound/soc/fsl/fsl_dma.c b/sound/soc/fsl/fsl_dma.c index ccadefceeff2..aca066b5a43c 100644 --- a/sound/soc/fsl/fsl_dma.c +++ b/sound/soc/fsl/fsl_dma.c @@ -1,18 +1,14 @@ -/* - * Freescale DMA ALSA SoC PCM driver - * - * Author: Timur Tabi <timur@freescale.com> - * - * Copyright 2007-2010 Freescale Semiconductor, Inc. - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - * - * This driver implements ASoC support for the Elo DMA controller, which is - * the DMA controller on Freescale 83xx, 85xx, and 86xx SOCs. In ALSA terms, - * the PCM driver is what handles the DMA buffer. - */ +// SPDX-License-Identifier: GPL-2.0 +// +// Freescale DMA ALSA SoC PCM driver +// +// Author: Timur Tabi <timur@freescale.com> +// +// Copyright 2007-2010 Freescale Semiconductor, Inc. +// +// This driver implements ASoC support for the Elo DMA controller, which is +// the DMA controller on Freescale 83xx, 85xx, and 86xx SOCs. In ALSA terms, +// the PCM driver is what handles the DMA buffer. #include <linux/module.h> #include <linux/init.h> @@ -37,6 +33,8 @@ #include "fsl_dma.h" #include "fsl_ssi.h" /* For the offset of stx0 and srx0 */ +#define DRV_NAME "fsl_dma" + /* * The formats that the DMA controller supports, which is anything * that is 8, 16, or 32 bits. @@ -56,14 +54,13 @@ SNDRV_PCM_FMTBIT_U32_LE | \ SNDRV_PCM_FMTBIT_U32_BE) struct dma_object { - struct snd_soc_platform_driver dai; + struct snd_soc_component_driver dai; dma_addr_t ssi_stx_phys; dma_addr_t ssi_srx_phys; unsigned int ssi_fifo_depth; struct ccsr_dma_channel __iomem *channel; unsigned int irq; bool assigned; - char path[1]; }; /* @@ -157,7 +154,7 @@ static void fsl_dma_abort_stream(struct snd_pcm_substream *substream) /** * fsl_dma_update_pointers - update LD pointers to point to the next period * - * As each period is completed, this function changes the the link + * As each period is completed, this function changes the link * descriptor pointers for that period to point to the next period. */ static void fsl_dma_update_pointers(struct fsl_dma_private *dma_private) @@ -203,8 +200,8 @@ static irqreturn_t fsl_dma_isr(int irq, void *dev_id) { struct fsl_dma_private *dma_private = dev_id; struct snd_pcm_substream *substream = dma_private->substream; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct device *dev = rtd->platform->dev; + struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); + struct device *dev = rtd->dev; struct ccsr_dma_channel __iomem *dma_channel = dma_private->dma_channel; irqreturn_t ret = IRQ_NONE; u32 sr, sr2 = 0; @@ -282,7 +279,8 @@ static irqreturn_t fsl_dma_isr(int irq, void *dev_id) * Regardless of where the memory is actually allocated, since the device can * technically DMA to any 36-bit address, we do need to set the DMA mask to 36. */ -static int fsl_dma_new(struct snd_soc_pcm_runtime *rtd) +static int fsl_dma_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) { struct snd_card *card = rtd->card->snd_card; struct snd_pcm *pcm = rtd->pcm; @@ -292,32 +290,9 @@ static int fsl_dma_new(struct snd_soc_pcm_runtime *rtd) if (ret) return ret; - /* Some codecs have separate DAIs for playback and capture, so we - * should allocate a DMA buffer only for the streams that are valid. - */ - - if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev, - fsl_dma_hardware.buffer_bytes_max, - &pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->dma_buffer); - if (ret) { - dev_err(card->dev, "can't alloc playback dma buffer\n"); - return ret; - } - } - - if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev, - fsl_dma_hardware.buffer_bytes_max, - &pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->dma_buffer); - if (ret) { - dev_err(card->dev, "can't alloc capture dma buffer\n"); - snd_dma_free_pages(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->dma_buffer); - return ret; - } - } - - return 0; + return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, + card->dev, + fsl_dma_hardware.buffer_bytes_max); } /** @@ -382,19 +357,18 @@ static int fsl_dma_new(struct snd_soc_pcm_runtime *rtd) * buffer, which is what ALSA expects. We're just dividing it into * contiguous parts, and creating a link descriptor for each one. */ -static int fsl_dma_open(struct snd_pcm_substream *substream) +static int fsl_dma_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct device *dev = rtd->platform->dev; + struct device *dev = component->dev; struct dma_object *dma = - container_of(rtd->platform->driver, struct dma_object, dai); + container_of(component->driver, struct dma_object, dai); struct fsl_dma_private *dma_private; struct ccsr_dma_channel __iomem *dma_channel; dma_addr_t ld_buf_phys; u64 temp_link; /* Pointer to next link descriptor */ u32 mr; - unsigned int channel; int ret = 0; unsigned int i; @@ -410,8 +384,6 @@ static int fsl_dma_open(struct snd_pcm_substream *substream) return ret; } - channel = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1; - if (dma->assigned) { dev_err(dev, "dma channel already assigned\n"); return -EBUSY; @@ -447,7 +419,6 @@ static int fsl_dma_open(struct snd_pcm_substream *substream) dma->assigned = true; - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); snd_soc_set_runtime_hwparams(substream, &fsl_dma_hardware); runtime->private_data = dma_private; @@ -534,13 +505,13 @@ static int fsl_dma_open(struct snd_pcm_substream *substream) * and 8 bytes at a time). So we do not support packed 24-bit samples. * 24-bit data must be padded to 32 bits. */ -static int fsl_dma_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) +static int fsl_dma_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) { struct snd_pcm_runtime *runtime = substream->runtime; struct fsl_dma_private *dma_private = runtime->private_data; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct device *dev = rtd->platform->dev; + struct device *dev = component->dev; /* Number of bits per sample */ unsigned int sample_bits = @@ -698,12 +669,12 @@ static int fsl_dma_hw_params(struct snd_pcm_substream *substream, * The base address of the buffer is stored in the source_addr field of the * first link descriptor. */ -static snd_pcm_uframes_t fsl_dma_pointer(struct snd_pcm_substream *substream) +static snd_pcm_uframes_t fsl_dma_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct fsl_dma_private *dma_private = runtime->private_data; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct device *dev = rtd->platform->dev; + struct device *dev = component->dev; struct ccsr_dma_channel __iomem *dma_channel = dma_private->dma_channel; dma_addr_t position; snd_pcm_uframes_t frames; @@ -762,7 +733,8 @@ static snd_pcm_uframes_t fsl_dma_pointer(struct snd_pcm_substream *substream) * * This function can be called multiple times. */ -static int fsl_dma_hw_free(struct snd_pcm_substream *substream) +static int fsl_dma_hw_free(struct snd_soc_component *component, + struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct fsl_dma_private *dma_private = runtime->private_data; @@ -795,14 +767,14 @@ static int fsl_dma_hw_free(struct snd_pcm_substream *substream) /** * fsl_dma_close: close the stream. */ -static int fsl_dma_close(struct snd_pcm_substream *substream) +static int fsl_dma_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct fsl_dma_private *dma_private = runtime->private_data; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct device *dev = rtd->platform->dev; + struct device *dev = component->dev; struct dma_object *dma = - container_of(rtd->platform->driver, struct dma_object, dai); + container_of(component->driver, struct dma_object, dai); if (dma_private) { if (dma_private->irq) @@ -819,24 +791,6 @@ static int fsl_dma_close(struct snd_pcm_substream *substream) return 0; } -/* - * Remove this PCM driver. - */ -static void fsl_dma_free_dma_buffers(struct snd_pcm *pcm) -{ - struct snd_pcm_substream *substream; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(pcm->streams); i++) { - substream = pcm->streams[i].substream; - if (substream) { - snd_dma_free_pages(&substream->dma_buffer); - substream->dma_buffer.area = NULL; - substream->dma_buffer.addr = 0; - } - } -} - /** * find_ssi_node -- returns the SSI node that points to its DMA channel node * @@ -870,17 +824,8 @@ static struct device_node *find_ssi_node(struct device_node *dma_channel_np) return NULL; } -static struct snd_pcm_ops fsl_dma_ops = { - .open = fsl_dma_open, - .close = fsl_dma_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = fsl_dma_hw_params, - .hw_free = fsl_dma_hw_free, - .pointer = fsl_dma_pointer, -}; - static int fsl_soc_dma_probe(struct platform_device *pdev) - { +{ struct dma_object *dma; struct device_node *np = pdev->dev.of_node; struct device_node *ssi_np; @@ -897,27 +842,29 @@ static int fsl_soc_dma_probe(struct platform_device *pdev) ret = of_address_to_resource(ssi_np, 0, &res); if (ret) { - dev_err(&pdev->dev, "could not determine resources for %s\n", - ssi_np->full_name); + dev_err(&pdev->dev, "could not determine resources for %pOF\n", + ssi_np); of_node_put(ssi_np); return ret; } - dma = kzalloc(sizeof(*dma) + strlen(np->full_name), GFP_KERNEL); + dma = kzalloc(sizeof(*dma), GFP_KERNEL); if (!dma) { - dev_err(&pdev->dev, "could not allocate dma object\n"); of_node_put(ssi_np); return -ENOMEM; } - strcpy(dma->path, np->full_name); - dma->dai.ops = &fsl_dma_ops; - dma->dai.pcm_new = fsl_dma_new; - dma->dai.pcm_free = fsl_dma_free_dma_buffers; + dma->dai.name = DRV_NAME; + dma->dai.open = fsl_dma_open; + dma->dai.close = fsl_dma_close; + dma->dai.hw_params = fsl_dma_hw_params; + dma->dai.hw_free = fsl_dma_hw_free; + dma->dai.pointer = fsl_dma_pointer; + dma->dai.pcm_construct = fsl_dma_new; /* Store the SSI-specific information that we need */ - dma->ssi_stx_phys = res.start + CCSR_SSI_STX0; - dma->ssi_srx_phys = res.start + CCSR_SSI_SRX0; + dma->ssi_stx_phys = res.start + REG_SSI_STX0; + dma->ssi_srx_phys = res.start + REG_SSI_SRX0; iprop = of_get_property(ssi_np, "fsl,fifo-depth", NULL); if (iprop) @@ -928,7 +875,7 @@ static int fsl_soc_dma_probe(struct platform_device *pdev) of_node_put(ssi_np); - ret = snd_soc_register_platform(&pdev->dev, &dma->dai); + ret = devm_snd_soc_register_component(&pdev->dev, &dma->dai, NULL, 0); if (ret) { dev_err(&pdev->dev, "could not register platform\n"); kfree(dma); @@ -943,16 +890,13 @@ static int fsl_soc_dma_probe(struct platform_device *pdev) return 0; } -static int fsl_soc_dma_remove(struct platform_device *pdev) +static void fsl_soc_dma_remove(struct platform_device *pdev) { struct dma_object *dma = dev_get_drvdata(&pdev->dev); - snd_soc_unregister_platform(&pdev->dev); iounmap(dma->channel); irq_dispose_mapping(dma->irq); kfree(dma); - - return 0; } static const struct of_device_id fsl_soc_dma_ids[] = { |