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ASoC: amd: add acp6.2 pdm driver dma ops
This patch adds PDM driver DMA operations for Pink Sardine Platform. Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@amd.com> Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com> Link: https://lore.kernel.org/r/20220827165657.2343818-8-Syed.SabaKareem@amd.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Syed Saba Kareem
Mark Brown
parent
5bbeca60a5
commit
5137305662
@ -26,6 +26,31 @@
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#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
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#define PDM_DMA_STAT 0x10
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#define PDM_DMA_INTR_MASK 0x10000
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#define ACP_ERROR_STAT 29
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#define PDM_DECIMATION_FACTOR 2
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#define ACP_PDM_CLK_FREQ_MASK 7
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#define ACP_WOV_MISC_CTRL_MASK 0x10
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#define ACP_PDM_ENABLE 1
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#define ACP_PDM_DISABLE 0
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#define ACP_PDM_DMA_EN_STATUS 2
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#define TWO_CH 2
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#define DELAY_US 5
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#define ACP_COUNTER 20000
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#define ACP_SRAM_PTE_OFFSET 0x03800000
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#define PAGE_SIZE_4K_ENABLE 2
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#define PDM_PTE_OFFSET 0
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#define PDM_MEM_WINDOW_START 0x4000000
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#define CAPTURE_MIN_NUM_PERIODS 4
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#define CAPTURE_MAX_NUM_PERIODS 4
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#define CAPTURE_MAX_PERIOD_SIZE 8192
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#define CAPTURE_MIN_PERIOD_SIZE 4096
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#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
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#define MIN_BUFFER MAX_BUFFER
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enum acp_config {
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ACP_CONFIG_0 = 0,
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ACP_CONFIG_1,
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@ -45,6 +70,14 @@ enum acp_config {
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ACP_CONFIG_15,
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};
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struct pdm_stream_instance {
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u16 num_pages;
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u16 channels;
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dma_addr_t dma_addr;
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u64 bytescount;
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void __iomem *acp62_base;
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};
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struct pdm_dev_data {
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u32 pdm_irq;
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void __iomem *acp62_base;
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@ -17,6 +17,313 @@
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#define DRV_NAME "acp_ps_pdm_dma"
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static const struct snd_pcm_hardware acp62_pdm_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_MMAP |
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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_S32_LE,
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.rate_min = 48000,
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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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static void acp62_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size,
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u32 watermark_size, void __iomem *acp_base)
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{
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acp62_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR);
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acp62_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE);
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acp62_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
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acp62_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
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}
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static void acp62_enable_pdm_clock(void __iomem *acp_base)
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{
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u32 pdm_clk_enable, pdm_ctrl;
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pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK;
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pdm_ctrl = 0x00;
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acp62_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
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pdm_ctrl = acp62_readl(acp_base + ACP_WOV_MISC_CTRL);
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pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
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acp62_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
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}
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static void acp62_enable_pdm_interrupts(void __iomem *acp_base)
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{
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u32 ext_int_ctrl;
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ext_int_ctrl = acp62_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
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ext_int_ctrl |= PDM_DMA_INTR_MASK;
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acp62_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
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}
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static void acp62_disable_pdm_interrupts(void __iomem *acp_base)
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{
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u32 ext_int_ctrl;
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ext_int_ctrl = acp62_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
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ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
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acp62_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
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}
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static bool acp62_check_pdm_dma_status(void __iomem *acp_base)
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{
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bool pdm_dma_status;
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u32 pdm_enable, pdm_dma_enable;
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pdm_dma_status = false;
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pdm_enable = acp62_readl(acp_base + ACP_WOV_PDM_ENABLE);
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pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
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if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS))
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pdm_dma_status = true;
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return pdm_dma_status;
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}
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static int acp62_start_pdm_dma(void __iomem *acp_base)
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{
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u32 pdm_enable;
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u32 pdm_dma_enable;
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int timeout;
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pdm_enable = 0x01;
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pdm_dma_enable = 0x01;
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acp62_enable_pdm_clock(acp_base);
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acp62_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
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acp62_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
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timeout = 0;
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while (++timeout < ACP_COUNTER) {
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pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
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if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS)
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return 0;
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udelay(DELAY_US);
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}
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return -ETIMEDOUT;
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}
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static int acp62_stop_pdm_dma(void __iomem *acp_base)
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{
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u32 pdm_enable, pdm_dma_enable;
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int timeout;
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pdm_enable = 0x00;
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pdm_dma_enable = 0x00;
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pdm_enable = acp62_readl(acp_base + ACP_WOV_PDM_ENABLE);
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pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
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if (pdm_dma_enable & 0x01) {
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pdm_dma_enable = 0x02;
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acp62_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
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timeout = 0;
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while (++timeout < ACP_COUNTER) {
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pdm_dma_enable = acp62_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
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if ((pdm_dma_enable & 0x02) == 0x00)
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break;
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udelay(DELAY_US);
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}
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if (timeout == ACP_COUNTER)
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return -ETIMEDOUT;
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}
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if (pdm_enable == ACP_PDM_ENABLE) {
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pdm_enable = ACP_PDM_DISABLE;
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acp62_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
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}
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acp62_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH);
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return 0;
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}
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static void acp62_config_dma(struct pdm_stream_instance *rtd, int direction)
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{
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u16 page_idx;
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u32 low, high, val;
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dma_addr_t addr;
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addr = rtd->dma_addr;
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val = PDM_PTE_OFFSET;
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/* Group Enable */
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acp62_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp62_base +
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ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
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acp62_writel(PAGE_SIZE_4K_ENABLE, rtd->acp62_base +
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ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
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for (page_idx = 0; page_idx < rtd->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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acp62_writel(low, rtd->acp62_base + ACP_SCRATCH_REG_0 + val);
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high |= BIT(31);
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acp62_writel(high, rtd->acp62_base + ACP_SCRATCH_REG_0 + val + 4);
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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 acp62_pdm_dma_open(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime;
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struct pdm_dev_data *adata;
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struct pdm_stream_instance *pdm_data;
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int ret;
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runtime = substream->runtime;
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adata = dev_get_drvdata(component->dev);
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pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL);
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if (!pdm_data)
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return -EINVAL;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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runtime->hw = acp62_pdm_hardware_capture;
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ret = snd_pcm_hw_constraint_integer(runtime,
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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(pdm_data);
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return ret;
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}
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acp62_enable_pdm_interrupts(adata->acp62_base);
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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adata->capture_stream = substream;
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pdm_data->acp62_base = adata->acp62_base;
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runtime->private_data = pdm_data;
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return ret;
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}
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static int acp62_pdm_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 pdm_stream_instance *rtd;
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size_t size, period_bytes;
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rtd = substream->runtime->private_data;
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if (!rtd)
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return -EINVAL;
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size = params_buffer_bytes(params);
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period_bytes = params_period_bytes(params);
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rtd->dma_addr = substream->runtime->dma_addr;
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rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
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acp62_config_dma(rtd, substream->stream);
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acp62_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size,
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period_bytes, rtd->acp62_base);
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return 0;
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}
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static u64 acp62_pdm_get_byte_count(struct pdm_stream_instance *rtd,
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int direction)
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{
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u32 high, low;
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u64 byte_count;
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high = acp62_readl(rtd->acp62_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
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byte_count = high;
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low = acp62_readl(rtd->acp62_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
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byte_count = (byte_count << 32) | low;
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return byte_count;
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}
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static snd_pcm_uframes_t acp62_pdm_dma_pointer(struct snd_soc_component *comp,
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struct snd_pcm_substream *stream)
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{
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struct pdm_stream_instance *rtd;
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u32 pos, buffersize;
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u64 bytescount;
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rtd = stream->runtime->private_data;
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buffersize = frames_to_bytes(stream->runtime,
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stream->runtime->buffer_size);
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bytescount = acp62_pdm_get_byte_count(rtd, stream->stream);
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if (bytescount > rtd->bytescount)
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bytescount -= rtd->bytescount;
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pos = do_div(bytescount, buffersize);
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return bytes_to_frames(stream->runtime, pos);
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}
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static int acp62_pdm_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 acp62_pdm_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 pdm_dev_data *adata = dev_get_drvdata(component->dev);
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struct snd_pcm_runtime *runtime = substream->runtime;
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acp62_disable_pdm_interrupts(adata->acp62_base);
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adata->capture_stream = NULL;
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kfree(runtime->private_data);
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return 0;
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}
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static int acp62_pdm_dai_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct pdm_stream_instance *rtd;
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int ret;
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bool pdm_status;
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unsigned int ch_mask;
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rtd = substream->runtime->private_data;
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ret = 0;
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switch (substream->runtime->channels) {
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case TWO_CH:
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ch_mask = 0x00;
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break;
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default:
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return -EINVAL;
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}
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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acp62_writel(ch_mask, rtd->acp62_base + ACP_WOV_PDM_NO_OF_CHANNELS);
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acp62_writel(PDM_DECIMATION_FACTOR, rtd->acp62_base +
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ACP_WOV_PDM_DECIMATION_FACTOR);
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rtd->bytescount = acp62_pdm_get_byte_count(rtd, substream->stream);
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pdm_status = acp62_check_pdm_dma_status(rtd->acp62_base);
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if (!pdm_status)
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ret = acp62_start_pdm_dma(rtd->acp62_base);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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pdm_status = acp62_check_pdm_dma_status(rtd->acp62_base);
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if (pdm_status)
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ret = acp62_stop_pdm_dma(rtd->acp62_base);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static const struct snd_soc_dai_ops acp62_pdm_dai_ops = {
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.trigger = acp62_pdm_dai_trigger,
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};
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static struct snd_soc_dai_driver acp62_pdm_dai_driver = {
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.name = "acp_ps_pdm_dma.0",
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.capture = {
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@ -27,10 +334,16 @@ static struct snd_soc_dai_driver acp62_pdm_dai_driver = {
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.rate_min = 48000,
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.rate_max = 48000,
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},
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.ops = &acp62_pdm_dai_ops,
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};
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static const struct snd_soc_component_driver acp62_pdm_component = {
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.name = DRV_NAME,
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.open = acp62_pdm_dma_open,
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.close = acp62_pdm_dma_close,
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.hw_params = acp62_pdm_dma_hw_params,
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.pointer = acp62_pdm_dma_pointer,
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.pcm_construct = acp62_pdm_dma_new,
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};
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static int acp62_pdm_audio_probe(struct platform_device *pdev)
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