323 lines
9.1 KiB
C
323 lines
9.1 KiB
C
// 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 <AjitKumar.Pandey@amd.com>
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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_resource *rsrc = adata->rsrc;
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struct acp_stream *stream;
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u16 i2s_flag = 0;
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u32 ext_intr_stat, ext_intr_stat1;
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if (!adata)
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return IRQ_NONE;
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if (adata->rsrc->no_of_ctrls == 2)
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ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
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ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
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spin_lock(&adata->acp_lock);
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list_for_each_entry(stream, &adata->stream_list, list) {
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if (ext_intr_stat & stream->irq_bit) {
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writel(stream->irq_bit,
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ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
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snd_pcm_period_elapsed(stream->substream);
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i2s_flag = 1;
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}
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if (adata->rsrc->no_of_ctrls == 2) {
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if (ext_intr_stat1 & stream->irq_bit) {
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writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
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(rsrc->irqp_used - 1)));
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snd_pcm_period_elapsed(stream->substream);
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i2s_flag = 1;
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}
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}
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}
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spin_unlock(&adata->acp_lock);
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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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struct acp_resource *rsrc = adata->rsrc;
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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 = rsrc->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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writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
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}
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static void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
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{
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struct snd_pcm_substream *substream = stream->substream;
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struct acp_resource *rsrc = adata->rsrc;
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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 + rsrc->scratch_reg_offset + val);
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high |= BIT(31);
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writel(high, adata->acp_base + rsrc->scratch_reg_offset + 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_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 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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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, ACP_EXTERNAL_INTR_ENB(adata));
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spin_lock_irq(&adata->acp_lock);
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list_add_tail(&stream->list, &adata->stream_list);
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spin_unlock_irq(&adata->acp_lock);
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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 acp_dev_data *adata = snd_soc_component_get_drvdata(component);
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struct acp_stream *stream = substream->runtime->private_data;
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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, 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_close(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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/* Remove entry from list */
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spin_lock_irq(&adata->acp_lock);
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list_del(&stream->list);
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spin_unlock_irq(&adata->acp_lock);
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kfree(stream);
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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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.pcm_construct = acp_dma_new,
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.legacy_dai_naming = 1,
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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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INIT_LIST_HEAD(&adata->stream_list);
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spin_lock_init(&adata->acp_lock);
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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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