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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /sound/soc/amd/ps/ps-pdm-dma.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/amd/ps/ps-pdm-dma.c')
-rw-r--r-- | sound/soc/amd/ps/ps-pdm-dma.c | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/sound/soc/amd/ps/ps-pdm-dma.c b/sound/soc/amd/ps/ps-pdm-dma.c new file mode 100644 index 000000000..eea71a9d2 --- /dev/null +++ b/sound/soc/amd/ps/ps-pdm-dma.c @@ -0,0 +1,452 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD ALSA SoC Pink Sardine PDM Driver + * + * Copyright 2022 Advanced Micro Devices, Inc. + */ + +#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 "acp63.h" + +#define DRV_NAME "acp_ps_pdm_dma" + +static const struct snd_pcm_hardware acp63_pdm_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_S32_LE, + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .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 void acp63_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size, + u32 watermark_size, void __iomem *acp_base) +{ + acp63_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR); + acp63_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE); + acp63_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE); + acp63_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL); +} + +static void acp63_enable_pdm_clock(void __iomem *acp_base) +{ + u32 pdm_clk_enable, pdm_ctrl; + + pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK; + pdm_ctrl = 0x00; + + acp63_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL); + pdm_ctrl = acp63_readl(acp_base + ACP_WOV_MISC_CTRL); + pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK; + acp63_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL); +} + +static void acp63_enable_pdm_interrupts(void __iomem *acp_base) +{ + u32 ext_int_ctrl; + + ext_int_ctrl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_int_ctrl |= PDM_DMA_INTR_MASK; + acp63_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static void acp63_disable_pdm_interrupts(void __iomem *acp_base) +{ + u32 ext_int_ctrl; + + ext_int_ctrl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_int_ctrl &= ~PDM_DMA_INTR_MASK; + acp63_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static bool acp63_check_pdm_dma_status(void __iomem *acp_base) +{ + bool pdm_dma_status; + u32 pdm_enable, pdm_dma_enable; + + pdm_dma_status = false; + pdm_enable = acp63_readl(acp_base + ACP_WOV_PDM_ENABLE); + pdm_dma_enable = acp63_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); + if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS)) + pdm_dma_status = true; + + return pdm_dma_status; +} + +static int acp63_start_pdm_dma(void __iomem *acp_base) +{ + u32 pdm_enable; + u32 pdm_dma_enable; + int timeout; + + pdm_enable = 0x01; + pdm_dma_enable = 0x01; + + acp63_enable_pdm_clock(acp_base); + acp63_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); + acp63_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); + timeout = 0; + while (++timeout < ACP_COUNTER) { + pdm_dma_enable = acp63_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); + if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS) + return 0; + udelay(DELAY_US); + } + return -ETIMEDOUT; +} + +static int acp63_stop_pdm_dma(void __iomem *acp_base) +{ + u32 pdm_enable, pdm_dma_enable; + int timeout; + + pdm_enable = 0x00; + pdm_dma_enable = 0x00; + + pdm_enable = acp63_readl(acp_base + ACP_WOV_PDM_ENABLE); + pdm_dma_enable = acp63_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); + if (pdm_dma_enable & 0x01) { + pdm_dma_enable = 0x02; + acp63_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); + timeout = 0; + while (++timeout < ACP_COUNTER) { + pdm_dma_enable = acp63_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); + if ((pdm_dma_enable & 0x02) == 0x00) + break; + udelay(DELAY_US); + } + if (timeout == ACP_COUNTER) + return -ETIMEDOUT; + } + if (pdm_enable == ACP_PDM_ENABLE) { + pdm_enable = ACP_PDM_DISABLE; + acp63_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); + } + acp63_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH); + return 0; +} + +static void acp63_config_dma(struct pdm_stream_instance *rtd, int direction) +{ + u16 page_idx; + u32 low, high, val; + dma_addr_t addr; + + addr = rtd->dma_addr; + val = PDM_PTE_OFFSET; + + /* Group Enable */ + acp63_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp63_base + + ACPAXI2AXI_ATU_BASE_ADDR_GRP_1); + acp63_writel(PAGE_SIZE_4K_ENABLE, rtd->acp63_base + + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1); + for (page_idx = 0; page_idx < rtd->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); + + acp63_writel(low, rtd->acp63_base + ACP_SCRATCH_REG_0 + val); + high |= BIT(31); + acp63_writel(high, rtd->acp63_base + ACP_SCRATCH_REG_0 + val + 4); + val += 8; + addr += PAGE_SIZE; + } +} + +static int acp63_pdm_dma_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime; + struct pdm_dev_data *adata; + struct pdm_stream_instance *pdm_data; + int ret; + + runtime = substream->runtime; + adata = dev_get_drvdata(component->dev); + pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL); + if (!pdm_data) + return -EINVAL; + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + runtime->hw = acp63_pdm_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(pdm_data); + return ret; + } + + acp63_enable_pdm_interrupts(adata->acp63_base); + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + adata->capture_stream = substream; + + pdm_data->acp63_base = adata->acp63_base; + runtime->private_data = pdm_data; + return ret; +} + +static int acp63_pdm_dma_hw_params(struct snd_soc_component *component, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct pdm_stream_instance *rtd; + size_t size, period_bytes; + + rtd = substream->runtime->private_data; + if (!rtd) + return -EINVAL; + size = params_buffer_bytes(params); + period_bytes = params_period_bytes(params); + rtd->dma_addr = substream->runtime->dma_addr; + rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); + acp63_config_dma(rtd, substream->stream); + acp63_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size, + period_bytes, rtd->acp63_base); + return 0; +} + +static u64 acp63_pdm_get_byte_count(struct pdm_stream_instance *rtd, + int direction) +{ + u32 high, low; + u64 byte_count; + + high = acp63_readl(rtd->acp63_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH); + byte_count = high; + low = acp63_readl(rtd->acp63_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW); + byte_count = (byte_count << 32) | low; + return byte_count; +} + +static snd_pcm_uframes_t acp63_pdm_dma_pointer(struct snd_soc_component *comp, + struct snd_pcm_substream *stream) +{ + struct pdm_stream_instance *rtd; + u32 pos, buffersize; + u64 bytescount; + + rtd = stream->runtime->private_data; + buffersize = frames_to_bytes(stream->runtime, + stream->runtime->buffer_size); + bytescount = acp63_pdm_get_byte_count(rtd, stream->stream); + if (bytescount > rtd->bytescount) + bytescount -= rtd->bytescount; + pos = do_div(bytescount, buffersize); + return bytes_to_frames(stream->runtime, pos); +} + +static int acp63_pdm_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 acp63_pdm_dma_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct pdm_dev_data *adata = dev_get_drvdata(component->dev); + struct snd_pcm_runtime *runtime = substream->runtime; + + acp63_disable_pdm_interrupts(adata->acp63_base); + adata->capture_stream = NULL; + kfree(runtime->private_data); + return 0; +} + +static int acp63_pdm_dai_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct pdm_stream_instance *rtd; + int ret; + bool pdm_status; + unsigned int ch_mask; + + rtd = substream->runtime->private_data; + ret = 0; + switch (substream->runtime->channels) { + case TWO_CH: + ch_mask = 0x00; + break; + default: + return -EINVAL; + } + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + acp63_writel(ch_mask, rtd->acp63_base + ACP_WOV_PDM_NO_OF_CHANNELS); + acp63_writel(PDM_DECIMATION_FACTOR, rtd->acp63_base + + ACP_WOV_PDM_DECIMATION_FACTOR); + rtd->bytescount = acp63_pdm_get_byte_count(rtd, substream->stream); + pdm_status = acp63_check_pdm_dma_status(rtd->acp63_base); + if (!pdm_status) + ret = acp63_start_pdm_dma(rtd->acp63_base); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + pdm_status = acp63_check_pdm_dma_status(rtd->acp63_base); + if (pdm_status) + ret = acp63_stop_pdm_dma(rtd->acp63_base); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static const struct snd_soc_dai_ops acp63_pdm_dai_ops = { + .trigger = acp63_pdm_dai_trigger, +}; + +static struct snd_soc_dai_driver acp63_pdm_dai_driver = { + .name = "acp_ps_pdm_dma.0", + .capture = { + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 2, + .channels_max = 2, + .rate_min = 48000, + .rate_max = 48000, + }, + .ops = &acp63_pdm_dai_ops, +}; + +static const struct snd_soc_component_driver acp63_pdm_component = { + .name = DRV_NAME, + .open = acp63_pdm_dma_open, + .close = acp63_pdm_dma_close, + .hw_params = acp63_pdm_dma_hw_params, + .pointer = acp63_pdm_dma_pointer, + .pcm_construct = acp63_pdm_dma_new, +}; + +static int acp63_pdm_audio_probe(struct platform_device *pdev) +{ + struct resource *res; + struct pdm_dev_data *adata; + int status; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); + return -ENODEV; + } + + adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL); + if (!adata) + return -ENOMEM; + + adata->acp63_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!adata->acp63_base) + return -ENOMEM; + + adata->capture_stream = NULL; + + dev_set_drvdata(&pdev->dev, adata); + status = devm_snd_soc_register_component(&pdev->dev, + &acp63_pdm_component, + &acp63_pdm_dai_driver, 1); + if (status) { + dev_err(&pdev->dev, "Fail to register acp pdm dai\n"); + + return -ENODEV; + } + pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_allow(&pdev->dev); + return 0; +} + +static int acp63_pdm_audio_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} + +static int __maybe_unused acp63_pdm_resume(struct device *dev) +{ + struct pdm_dev_data *adata; + struct snd_pcm_runtime *runtime; + struct pdm_stream_instance *rtd; + u32 period_bytes, buffer_len; + + adata = dev_get_drvdata(dev); + if (adata->capture_stream && adata->capture_stream->runtime) { + runtime = adata->capture_stream->runtime; + rtd = runtime->private_data; + period_bytes = frames_to_bytes(runtime, runtime->period_size); + buffer_len = frames_to_bytes(runtime, runtime->buffer_size); + acp63_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE); + acp63_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len, + period_bytes, adata->acp63_base); + } + acp63_enable_pdm_interrupts(adata->acp63_base); + return 0; +} + +static int __maybe_unused acp63_pdm_suspend(struct device *dev) +{ + struct pdm_dev_data *adata; + + adata = dev_get_drvdata(dev); + acp63_disable_pdm_interrupts(adata->acp63_base); + return 0; +} + +static int __maybe_unused acp63_pdm_runtime_resume(struct device *dev) +{ + struct pdm_dev_data *adata; + + adata = dev_get_drvdata(dev); + acp63_enable_pdm_interrupts(adata->acp63_base); + return 0; +} + +static const struct dev_pm_ops acp63_pdm_pm_ops = { + SET_RUNTIME_PM_OPS(acp63_pdm_suspend, acp63_pdm_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(acp63_pdm_suspend, acp63_pdm_resume) +}; + +static struct platform_driver acp63_pdm_dma_driver = { + .probe = acp63_pdm_audio_probe, + .remove = acp63_pdm_audio_remove, + .driver = { + .name = "acp_ps_pdm_dma", + .pm = &acp63_pdm_pm_ops, + }, +}; + +module_platform_driver(acp63_pdm_dma_driver); + +MODULE_AUTHOR("Syed.SabaKareem@amd.com"); +MODULE_DESCRIPTION("AMD PINK SARDINE PDM Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); |