// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2021 Advanced Micro Devices, Inc.
//
// Authors: Ajit Kumar Pandey <[email protected]>
/*
* Generic interface for ACP audio blck PCM component
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <linux/dma-mapping.h>
#include "amd.h"
#include "../mach-config.h"
#include "acp-mach.h"
#define DRV_NAME "acp_i2s_dma"
static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_96000,
.rate_min = 8000,
.rate_max = 96000,
.buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
.periods_min = PLAYBACK_MIN_NUM_PERIODS,
.periods_max = PLAYBACK_MAX_NUM_PERIODS,
};
static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_BATCH |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.rate_min = 8000,
.rate_max = 48000,
.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
.periods_min = CAPTURE_MIN_NUM_PERIODS,
.periods_max = CAPTURE_MAX_NUM_PERIODS,
};
static const struct snd_pcm_hardware acp6x_pcm_hardware_playback = {
.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 | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 32,
.rates = SNDRV_PCM_RATE_8000_192000,
.rate_min = 8000,
.rate_max = 192000,
.buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
.periods_min = PLAYBACK_MIN_NUM_PERIODS,
.periods_max = PLAYBACK_MAX_NUM_PERIODS,
};
static const struct snd_pcm_hardware acp6x_pcm_hardware_capture = {
.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 | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 32,
.rates = SNDRV_PCM_RATE_8000_192000,
.rate_min = 8000,
.rate_max = 192000,
.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
.periods_min = CAPTURE_MIN_NUM_PERIODS,
.periods_max = CAPTURE_MAX_NUM_PERIODS,
};
int acp_machine_select(struct acp_dev_data *adata)
{
struct snd_soc_acpi_mach *mach;
int size, platform;
if (adata->flag == FLAG_AMD_LEGACY_ONLY_DMIC) {
platform = adata->platform;
adata->mach_dev = platform_device_register_data(adata->dev, "acp-pdm-mach",
PLATFORM_DEVID_NONE, &platform,
sizeof(platform));
} else {
size = sizeof(*adata->machines);
mach = snd_soc_acpi_find_machine(adata->machines);
if (!mach) {
dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
return -EINVAL;
}
adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
PLATFORM_DEVID_NONE, mach, size);
}
if (IS_ERR(adata->mach_dev))
dev_warn(adata->dev, "Unable to register Machine device\n");
return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
static irqreturn_t i2s_irq_handler(int irq, void *data)
{
struct acp_dev_data *adata = data;
struct acp_resource *rsrc = adata->rsrc;
struct acp_stream *stream;
u16 i2s_flag = 0;
u32 ext_intr_stat, ext_intr_stat1;
if (!adata)
return IRQ_NONE;
if (adata->rsrc->no_of_ctrls == 2)
ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
spin_lock(&adata->acp_lock);
list_for_each_entry(stream, &adata->stream_list, list) {
if (ext_intr_stat & stream->irq_bit) {
writel(stream->irq_bit,
ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
snd_pcm_period_elapsed(stream->substream);
i2s_flag = 1;
}
if (adata->rsrc->no_of_ctrls == 2) {
if (ext_intr_stat1 & stream->irq_bit) {
writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
(rsrc->irqp_used - 1)));
snd_pcm_period_elapsed(stream->substream);
i2s_flag = 1;
}
}
}
spin_unlock(&adata->acp_lock);
if (i2s_flag)
return IRQ_HANDLED;
return IRQ_NONE;
}
void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
{
struct acp_resource *rsrc = adata->rsrc;
u32 reg_val;
reg_val = rsrc->sram_pte_offset;
stream->reg_offset = 0x02000000;
writel((reg_val + GRP1_OFFSET) | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
writel((reg_val + GRP2_OFFSET) | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_2);
writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_2);
writel(reg_val | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_5);
writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5);
writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
}
EXPORT_SYMBOL_NS_GPL(config_pte_for_stream, SND_SOC_ACP_COMMON);
void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
{
struct snd_pcm_substream *substream = stream->substream;
struct acp_resource *rsrc = adata->rsrc;
dma_addr_t addr = substream->dma_buffer.addr;
int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
u32 low, high, val;
u16 page_idx;
switch (adata->platform) {
case ACP70:
case ACP71:
switch (stream->dai_id) {
case I2S_SP_INSTANCE:
if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK)
val = 0x0;
else
val = 0x1000;
break;
case I2S_BT_INSTANCE:
if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK)
val = 0x2000;
else
val = 0x3000;
break;
case I2S_HS_INSTANCE:
if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK)
val = 0x4000;
else
val = 0x5000;
break;
case DMIC_INSTANCE:
val = 0x6000;
break;
default:
dev_err(adata->dev, "Invalid dai id %x\n", stream->dai_id);
return;
}
break;
default:
val = stream->pte_offset;
break;
}
for (page_idx = 0; page_idx < num_pages; page_idx++) {
/* Load the low address of page int ACP SRAM through SRBM */
low = lower_32_bits(addr);
high = upper_32_bits(addr);
writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
high |= BIT(31);
writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);
/* Move to next physically contiguous page */
val += 8;
addr += PAGE_SIZE;
}
}
EXPORT_SYMBOL_NS_GPL(config_acp_dma, SND_SOC_ACP_COMMON);
static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct device *dev = component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
struct acp_chip_info *chip;
struct acp_stream *stream;
int ret;
stream = kzalloc(sizeof(*stream), GFP_KERNEL);
if (!stream)
return -ENOMEM;
stream->substream = substream;
chip = dev_get_platdata(dev);
switch (chip->acp_rev) {
case ACP63_DEV:
case ACP70_DEV:
case ACP71_DEV:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
runtime->hw = acp6x_pcm_hardware_playback;
else
runtime->hw = acp6x_pcm_hardware_capture;
break;
default:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
runtime->hw = acp_pcm_hardware_playback;
else
runtime->hw = acp_pcm_hardware_capture;
break;
}
ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE);
if (ret) {
dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n");
kfree(stream);
return ret;
}
ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE);
if (ret) {
dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n");
kfree(stream);
return ret;
}
ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0) {
dev_err(component->dev, "set integer constraint failed\n");
kfree(stream);
return ret;
}
runtime->private_data = stream;
writel(1, ACP_EXTERNAL_INTR_ENB(adata));
spin_lock_irq(&adata->acp_lock);
list_add_tail(&stream->list, &adata->stream_list);
spin_unlock_irq(&adata->acp_lock);
return ret;
}
static int acp_dma_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
struct acp_stream *stream = substream->runtime->private_data;
u64 size = params_buffer_bytes(params);
/* Configure ACP DMA block with params */
config_pte_for_stream(adata, stream);
config_acp_dma(adata, stream, size);
return 0;
}
static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct device *dev = component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
struct acp_stream *stream = substream->runtime->private_data;
u32 pos, buffersize;
u64 bytescount;
buffersize = frames_to_bytes(substream->runtime,
substream->runtime->buffer_size);
bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
if (bytescount > stream->bytescount)
bytescount -= stream->bytescount;
pos = do_div(bytescount, buffersize);
return bytes_to_frames(substream->runtime, pos);
}
static int acp_dma_new(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
struct device *parent = component->dev->parent;
snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
parent, MIN_BUFFER, MAX_BUFFER);
return 0;
}
static int acp_dma_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct device *dev = component->dev;
struct acp_dev_data *adata = dev_get_drvdata(dev);
struct acp_stream *stream = substream->runtime->private_data;
/* Remove entry from list */
spin_lock_irq(&adata->acp_lock);
list_del(&stream->list);
spin_unlock_irq(&adata->acp_lock);
kfree(stream);
return 0;
}
static const struct snd_soc_component_driver acp_pcm_component = {
.name = DRV_NAME,
.open = acp_dma_open,
.close = acp_dma_close,
.hw_params = acp_dma_hw_params,
.pointer = acp_dma_pointer,
.pcm_construct = acp_dma_new,
.legacy_dai_naming = 1,
};
int acp_platform_register(struct device *dev)
{
struct acp_dev_data *adata = dev_get_drvdata(dev);
struct snd_soc_dai_driver;
unsigned int status;
status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
IRQF_SHARED, "ACP_I2S_IRQ", adata);
if (status) {
dev_err(dev, "ACP I2S IRQ request failed\n");
return status;
}
status = devm_snd_soc_register_component(dev, &acp_pcm_component,
adata->dai_driver,
adata->num_dai);
if (status) {
dev_err(dev, "Fail to register acp i2s component\n");
return status;
}
INIT_LIST_HEAD(&adata->stream_list);
spin_lock_init(&adata->acp_lock);
return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
int acp_platform_unregister(struct device *dev)
{
struct acp_dev_data *adata = dev_get_drvdata(dev);
if (adata->mach_dev)
platform_device_unregister(adata->mach_dev);
return 0;
}
EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
MODULE_DESCRIPTION("AMD ACP PCM Driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS(DRV_NAME);
Codebase Browser
linux