diff options
Diffstat (limited to 'sound/soc/amd/acp/acp-platform.c')
| -rw-r--r-- | sound/soc/amd/acp/acp-platform.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/sound/soc/amd/acp/acp-platform.c b/sound/soc/amd/acp/acp-platform.c new file mode 100644 index 000000000000..65a809e2c29f --- /dev/null +++ b/sound/soc/amd/acp/acp-platform.c @@ -0,0 +1,315 @@ +// 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 <AjitKumar.Pandey@amd.com> + +/* + * 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/pm_runtime.h> +#include <linux/dma-mapping.h> + +#include "amd.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, +}; + +int acp_machine_select(struct acp_dev_data *adata) +{ + struct snd_soc_acpi_mach *mach; + int size; + + 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_stream *stream; + u16 i2s_flag = 0; + u32 val, i; + + if (!adata) + return IRQ_NONE; + + val = readl(adata->acp_base + ACP_EXTERNAL_INTR_STAT); + + for (i = 0; i < ACP_MAX_STREAM; i++) { + stream = adata->stream[i]; + if (stream && (val & stream->irq_bit)) { + writel(stream->irq_bit, adata->acp_base + ACP_EXTERNAL_INTR_STAT); + snd_pcm_period_elapsed(stream->substream); + i2s_flag = 1; + break; + } + } + + if (i2s_flag) + return IRQ_HANDLED; + + return IRQ_NONE; +} + +static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream) +{ + u32 pte_reg, pte_size, reg_val; + + /* Use ATU base Group5 */ + pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5; + pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5; + stream->reg_offset = 0x02000000; + + /* Group Enable */ + reg_val = ACP_SRAM_PTE_OFFSET; + writel(reg_val | BIT(31), adata->acp_base + pte_reg); + writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size); +} + +static void config_acp_dma(struct acp_dev_data *adata, int cpu_id, int size) +{ + struct acp_stream *stream = adata->stream[cpu_id]; + struct snd_pcm_substream *substream = stream->substream; + dma_addr_t addr = substream->dma_buffer.addr; + int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); + u32 low, high, val; + u16 page_idx; + + val = stream->pte_offset; + + 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 + ACP_SCRATCH_REG_0 + val); + high |= BIT(31); + writel(high, adata->acp_base + ACP_SCRATCH_REG_0 + val + 4); + + /* Move to next physically contiguous page */ + val += 8; + addr += PAGE_SIZE; + } +} + +static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); + struct snd_pcm_runtime *runtime = substream->runtime; + struct device *dev = component->dev; + struct acp_dev_data *adata = dev_get_drvdata(dev); + struct acp_stream *stream; + int stream_id = cpu_dai->driver->id * 2 + substream->stream; + int ret; + + stream = kzalloc(sizeof(*stream), GFP_KERNEL); + if (!stream) + return -ENOMEM; + + stream->substream = substream; + adata->stream[stream_id] = stream; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + runtime->hw = acp_pcm_hardware_playback; + else + runtime->hw = acp_pcm_hardware_capture; + + 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, adata->acp_base + ACP_EXTERNAL_INTR_ENB); + + 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 snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct acp_dev_data *adata = snd_soc_component_get_drvdata(component); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); + struct acp_stream *stream = substream->runtime->private_data; + int stream_id = cpu_dai->driver->id * 2 + substream->stream; + u64 size = params_buffer_bytes(params); + + /* Configure ACP DMA block with params */ + config_pte_for_stream(adata, stream); + config_acp_dma(adata, stream_id, 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_mmap(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + return snd_pcm_lib_default_mmap(substream, vma); +} + +static int acp_dma_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); + struct device *dev = component->dev; + struct acp_dev_data *adata = dev_get_drvdata(dev); + struct acp_stream *stream; + int stream_id = cpu_dai->driver->id * 2 + substream->stream; + + stream = adata->stream[stream_id]; + kfree(stream); + adata->stream[stream_id] = NULL; + + 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, + .mmap = acp_dma_mmap, + .pcm_construct = acp_dma_new, +}; + +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; + } + 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); |