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315 lines
9.0 KiB
315 lines
9.0 KiB
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) |
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// |
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// This file is provided under a dual BSD/GPLv2 license. When using or |
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// redistributing this file, you may do so under either license. |
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// |
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// Copyright(c) 2021 Advanced Micro Devices, Inc. |
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// |
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// Authors: Ajit Kumar Pandey <[email protected]> |
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/* |
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* Generic interface for ACP audio blck PCM component |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dai.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/dma-mapping.h> |
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#include "amd.h" |
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#define DRV_NAME "acp_i2s_dma" |
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static const struct snd_pcm_hardware acp_pcm_hardware_playback = { |
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.info = SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER | |
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SNDRV_PCM_INFO_BATCH | |
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | |
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SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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.channels_min = 2, |
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.channels_max = 8, |
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.rates = SNDRV_PCM_RATE_8000_96000, |
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.rate_min = 8000, |
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.rate_max = 96000, |
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.buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, |
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.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, |
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.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, |
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.periods_min = PLAYBACK_MIN_NUM_PERIODS, |
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.periods_max = PLAYBACK_MAX_NUM_PERIODS, |
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}; |
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static const struct snd_pcm_hardware acp_pcm_hardware_capture = { |
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.info = SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER | |
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SNDRV_PCM_INFO_BATCH | |
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | |
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SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_48000, |
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.rate_min = 8000, |
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.rate_max = 48000, |
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.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, |
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.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, |
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.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, |
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.periods_min = CAPTURE_MIN_NUM_PERIODS, |
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.periods_max = CAPTURE_MAX_NUM_PERIODS, |
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}; |
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int acp_machine_select(struct acp_dev_data *adata) |
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{ |
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struct snd_soc_acpi_mach *mach; |
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int size; |
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size = sizeof(*adata->machines); |
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mach = snd_soc_acpi_find_machine(adata->machines); |
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if (!mach) { |
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dev_err(adata->dev, "warning: No matching ASoC machine driver found\n"); |
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return -EINVAL; |
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} |
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adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name, |
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PLATFORM_DEVID_NONE, mach, size); |
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if (IS_ERR(adata->mach_dev)) |
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dev_warn(adata->dev, "Unable to register Machine device\n"); |
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return 0; |
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} |
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EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON); |
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static irqreturn_t i2s_irq_handler(int irq, void *data) |
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{ |
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struct acp_dev_data *adata = data; |
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struct acp_stream *stream; |
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u16 i2s_flag = 0; |
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u32 val, i; |
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if (!adata) |
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return IRQ_NONE; |
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val = readl(adata->acp_base + ACP_EXTERNAL_INTR_STAT); |
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for (i = 0; i < ACP_MAX_STREAM; i++) { |
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stream = adata->stream[i]; |
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if (stream && (val & stream->irq_bit)) { |
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writel(stream->irq_bit, adata->acp_base + ACP_EXTERNAL_INTR_STAT); |
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snd_pcm_period_elapsed(stream->substream); |
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i2s_flag = 1; |
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break; |
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} |
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} |
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if (i2s_flag) |
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return IRQ_HANDLED; |
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return IRQ_NONE; |
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} |
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static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream) |
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{ |
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u32 pte_reg, pte_size, reg_val; |
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/* Use ATU base Group5 */ |
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pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5; |
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pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5; |
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stream->reg_offset = 0x02000000; |
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/* Group Enable */ |
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reg_val = ACP_SRAM_PTE_OFFSET; |
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writel(reg_val | BIT(31), adata->acp_base + pte_reg); |
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writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size); |
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} |
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static void config_acp_dma(struct acp_dev_data *adata, int cpu_id, int size) |
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{ |
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struct acp_stream *stream = adata->stream[cpu_id]; |
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struct snd_pcm_substream *substream = stream->substream; |
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dma_addr_t addr = substream->dma_buffer.addr; |
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int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); |
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u32 low, high, val; |
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u16 page_idx; |
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val = stream->pte_offset; |
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for (page_idx = 0; page_idx < num_pages; page_idx++) { |
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/* Load the low address of page int ACP SRAM through SRBM */ |
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low = lower_32_bits(addr); |
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high = upper_32_bits(addr); |
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writel(low, adata->acp_base + ACP_SCRATCH_REG_0 + val); |
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high |= BIT(31); |
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writel(high, adata->acp_base + ACP_SCRATCH_REG_0 + val + 4); |
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/* Move to next physically contiguous page */ |
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val += 8; |
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addr += PAGE_SIZE; |
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} |
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} |
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static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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struct device *dev = component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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struct acp_stream *stream; |
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int stream_id = cpu_dai->driver->id * 2 + substream->stream; |
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int ret; |
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stream = kzalloc(sizeof(*stream), GFP_KERNEL); |
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if (!stream) |
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return -ENOMEM; |
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stream->substream = substream; |
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adata->stream[stream_id] = stream; |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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runtime->hw = acp_pcm_hardware_playback; |
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else |
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runtime->hw = acp_pcm_hardware_capture; |
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ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
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if (ret < 0) { |
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dev_err(component->dev, "set integer constraint failed\n"); |
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kfree(stream); |
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return ret; |
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} |
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runtime->private_data = stream; |
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writel(1, adata->acp_base + ACP_EXTERNAL_INTR_ENB); |
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return ret; |
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} |
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static int acp_dma_hw_params(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); |
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struct acp_dev_data *adata = snd_soc_component_get_drvdata(component); |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); |
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struct acp_stream *stream = substream->runtime->private_data; |
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int stream_id = cpu_dai->driver->id * 2 + substream->stream; |
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u64 size = params_buffer_bytes(params); |
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/* Configure ACP DMA block with params */ |
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config_pte_for_stream(adata, stream); |
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config_acp_dma(adata, stream_id, size); |
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return 0; |
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} |
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static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct device *dev = component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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struct acp_stream *stream = substream->runtime->private_data; |
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u32 pos, buffersize; |
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u64 bytescount; |
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buffersize = frames_to_bytes(substream->runtime, |
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substream->runtime->buffer_size); |
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bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); |
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if (bytescount > stream->bytescount) |
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bytescount -= stream->bytescount; |
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pos = do_div(bytescount, buffersize); |
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return bytes_to_frames(substream->runtime, pos); |
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} |
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static int acp_dma_new(struct snd_soc_component *component, |
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struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct device *parent = component->dev->parent; |
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snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, |
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parent, MIN_BUFFER, MAX_BUFFER); |
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return 0; |
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} |
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static int acp_dma_mmap(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream, |
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struct vm_area_struct *vma) |
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{ |
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return snd_pcm_lib_default_mmap(substream, vma); |
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} |
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static int acp_dma_close(struct snd_soc_component *component, |
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struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); |
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struct device *dev = component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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struct acp_stream *stream; |
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int stream_id = cpu_dai->driver->id * 2 + substream->stream; |
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stream = adata->stream[stream_id]; |
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kfree(stream); |
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adata->stream[stream_id] = NULL; |
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return 0; |
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} |
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static const struct snd_soc_component_driver acp_pcm_component = { |
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.name = DRV_NAME, |
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.open = acp_dma_open, |
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.close = acp_dma_close, |
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.hw_params = acp_dma_hw_params, |
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.pointer = acp_dma_pointer, |
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.mmap = acp_dma_mmap, |
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.pcm_construct = acp_dma_new, |
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}; |
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int acp_platform_register(struct device *dev) |
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{ |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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struct snd_soc_dai_driver; |
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unsigned int status; |
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status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler, |
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IRQF_SHARED, "ACP_I2S_IRQ", adata); |
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if (status) { |
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dev_err(dev, "ACP I2S IRQ request failed\n"); |
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return status; |
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} |
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status = devm_snd_soc_register_component(dev, &acp_pcm_component, |
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adata->dai_driver, |
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adata->num_dai); |
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if (status) { |
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dev_err(dev, "Fail to register acp i2s component\n"); |
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return status; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON); |
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int acp_platform_unregister(struct device *dev) |
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{ |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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if (adata->mach_dev) |
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platform_device_unregister(adata->mach_dev); |
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return 0; |
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} |
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EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON); |
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MODULE_DESCRIPTION("AMD ACP PCM Driver"); |
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MODULE_LICENSE("Dual BSD/GPL"); |
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MODULE_ALIAS(DRV_NAME);
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