17610174aSVijendar Mukunda // SPDX-License-Identifier: GPL-2.0+ 27610174aSVijendar Mukunda /* 37610174aSVijendar Mukunda * AMD ALSA SoC Yellow Carp PDM Driver 47610174aSVijendar Mukunda * 57610174aSVijendar Mukunda * Copyright 2021 Advanced Micro Devices, Inc. 67610174aSVijendar Mukunda */ 77610174aSVijendar Mukunda 87610174aSVijendar Mukunda #include <linux/platform_device.h> 97610174aSVijendar Mukunda #include <linux/module.h> 107610174aSVijendar Mukunda #include <linux/err.h> 117610174aSVijendar Mukunda #include <linux/io.h> 127610174aSVijendar Mukunda #include <sound/pcm_params.h> 137610174aSVijendar Mukunda #include <sound/soc.h> 147610174aSVijendar Mukunda #include <sound/soc-dai.h> 154c2e711aSVijendar Mukunda #include <linux/pm_runtime.h> 167610174aSVijendar Mukunda 177610174aSVijendar Mukunda #include "acp6x.h" 187610174aSVijendar Mukunda 197610174aSVijendar Mukunda #define DRV_NAME "acp_yc_pdm_dma" 207610174aSVijendar Mukunda 21ceb4fcc1SVijendar Mukunda static const struct snd_pcm_hardware acp6x_pdm_hardware_capture = { 22ceb4fcc1SVijendar Mukunda .info = SNDRV_PCM_INFO_INTERLEAVED | 23ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_BLOCK_TRANSFER | 24ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_MMAP | 25ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_MMAP_VALID | 26ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 27ceb4fcc1SVijendar Mukunda .formats = SNDRV_PCM_FMTBIT_S32_LE, 28ceb4fcc1SVijendar Mukunda .channels_min = 2, 29ceb4fcc1SVijendar Mukunda .channels_max = 2, 30ceb4fcc1SVijendar Mukunda .rates = SNDRV_PCM_RATE_48000, 31ceb4fcc1SVijendar Mukunda .rate_min = 48000, 32ceb4fcc1SVijendar Mukunda .rate_max = 48000, 33ceb4fcc1SVijendar Mukunda .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 34ceb4fcc1SVijendar Mukunda .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 35ceb4fcc1SVijendar Mukunda .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 36ceb4fcc1SVijendar Mukunda .periods_min = CAPTURE_MIN_NUM_PERIODS, 37ceb4fcc1SVijendar Mukunda .periods_max = CAPTURE_MAX_NUM_PERIODS, 38ceb4fcc1SVijendar Mukunda }; 39ceb4fcc1SVijendar Mukunda 40ceb4fcc1SVijendar Mukunda static void acp6x_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size, 41ceb4fcc1SVijendar Mukunda u32 watermark_size, void __iomem *acp_base) 42ceb4fcc1SVijendar Mukunda { 43ceb4fcc1SVijendar Mukunda acp6x_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR); 44ceb4fcc1SVijendar Mukunda acp6x_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE); 45ceb4fcc1SVijendar Mukunda acp6x_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE); 46ceb4fcc1SVijendar Mukunda acp6x_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL); 47ceb4fcc1SVijendar Mukunda } 48ceb4fcc1SVijendar Mukunda 49ceb4fcc1SVijendar Mukunda static void acp6x_enable_pdm_clock(void __iomem *acp_base) 50ceb4fcc1SVijendar Mukunda { 51ceb4fcc1SVijendar Mukunda u32 pdm_clk_enable, pdm_ctrl; 52ceb4fcc1SVijendar Mukunda 53ceb4fcc1SVijendar Mukunda pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK; 54ceb4fcc1SVijendar Mukunda pdm_ctrl = 0x00; 55ceb4fcc1SVijendar Mukunda 56ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL); 57ceb4fcc1SVijendar Mukunda pdm_ctrl = acp6x_readl(acp_base + ACP_WOV_MISC_CTRL); 58ceb4fcc1SVijendar Mukunda pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK; 59ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL); 60ceb4fcc1SVijendar Mukunda } 61ceb4fcc1SVijendar Mukunda 62ceb4fcc1SVijendar Mukunda static void acp6x_enable_pdm_interrupts(void __iomem *acp_base) 63ceb4fcc1SVijendar Mukunda { 64ceb4fcc1SVijendar Mukunda u32 ext_int_ctrl; 65ceb4fcc1SVijendar Mukunda 66ceb4fcc1SVijendar Mukunda ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); 67ceb4fcc1SVijendar Mukunda ext_int_ctrl |= PDM_DMA_INTR_MASK; 68ceb4fcc1SVijendar Mukunda acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); 69ceb4fcc1SVijendar Mukunda } 70ceb4fcc1SVijendar Mukunda 71ceb4fcc1SVijendar Mukunda static void acp6x_disable_pdm_interrupts(void __iomem *acp_base) 72ceb4fcc1SVijendar Mukunda { 73ceb4fcc1SVijendar Mukunda u32 ext_int_ctrl; 74ceb4fcc1SVijendar Mukunda 75ceb4fcc1SVijendar Mukunda ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); 76ceb4fcc1SVijendar Mukunda ext_int_ctrl &= ~PDM_DMA_INTR_MASK; 77ceb4fcc1SVijendar Mukunda acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); 78ceb4fcc1SVijendar Mukunda } 79ceb4fcc1SVijendar Mukunda 80ceb4fcc1SVijendar Mukunda static bool acp6x_check_pdm_dma_status(void __iomem *acp_base) 81ceb4fcc1SVijendar Mukunda { 82ceb4fcc1SVijendar Mukunda bool pdm_dma_status; 83ceb4fcc1SVijendar Mukunda u32 pdm_enable, pdm_dma_enable; 84ceb4fcc1SVijendar Mukunda 85ceb4fcc1SVijendar Mukunda pdm_dma_status = false; 86ceb4fcc1SVijendar Mukunda pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE); 87ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 88ceb4fcc1SVijendar Mukunda if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS)) 89ceb4fcc1SVijendar Mukunda pdm_dma_status = true; 90ceb4fcc1SVijendar Mukunda 91ceb4fcc1SVijendar Mukunda return pdm_dma_status; 92ceb4fcc1SVijendar Mukunda } 93ceb4fcc1SVijendar Mukunda 94ceb4fcc1SVijendar Mukunda static int acp6x_start_pdm_dma(void __iomem *acp_base) 95ceb4fcc1SVijendar Mukunda { 96ceb4fcc1SVijendar Mukunda u32 pdm_enable; 97ceb4fcc1SVijendar Mukunda u32 pdm_dma_enable; 98ceb4fcc1SVijendar Mukunda int timeout; 99ceb4fcc1SVijendar Mukunda 100ceb4fcc1SVijendar Mukunda pdm_enable = 0x01; 101ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x01; 102ceb4fcc1SVijendar Mukunda 103ceb4fcc1SVijendar Mukunda acp6x_enable_pdm_clock(acp_base); 104ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); 105ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); 106ceb4fcc1SVijendar Mukunda timeout = 0; 107ceb4fcc1SVijendar Mukunda while (++timeout < ACP_COUNTER) { 108ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 109ceb4fcc1SVijendar Mukunda if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS) 110ceb4fcc1SVijendar Mukunda return 0; 111ceb4fcc1SVijendar Mukunda udelay(DELAY_US); 112ceb4fcc1SVijendar Mukunda } 113ceb4fcc1SVijendar Mukunda return -ETIMEDOUT; 114ceb4fcc1SVijendar Mukunda } 115ceb4fcc1SVijendar Mukunda 116ceb4fcc1SVijendar Mukunda static int acp6x_stop_pdm_dma(void __iomem *acp_base) 117ceb4fcc1SVijendar Mukunda { 118ceb4fcc1SVijendar Mukunda u32 pdm_enable, pdm_dma_enable; 119ceb4fcc1SVijendar Mukunda int timeout; 120ceb4fcc1SVijendar Mukunda 121ceb4fcc1SVijendar Mukunda pdm_enable = 0x00; 122ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x00; 123ceb4fcc1SVijendar Mukunda 124ceb4fcc1SVijendar Mukunda pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE); 125ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 126ceb4fcc1SVijendar Mukunda if (pdm_dma_enable & 0x01) { 127ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x02; 128ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); 129ceb4fcc1SVijendar Mukunda timeout = 0; 130ceb4fcc1SVijendar Mukunda while (++timeout < ACP_COUNTER) { 131ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 132ceb4fcc1SVijendar Mukunda if ((pdm_dma_enable & 0x02) == 0x00) 133ceb4fcc1SVijendar Mukunda break; 134ceb4fcc1SVijendar Mukunda udelay(DELAY_US); 135ceb4fcc1SVijendar Mukunda } 136ceb4fcc1SVijendar Mukunda if (timeout == ACP_COUNTER) 137ceb4fcc1SVijendar Mukunda return -ETIMEDOUT; 138ceb4fcc1SVijendar Mukunda } 139ceb4fcc1SVijendar Mukunda if (pdm_enable == ACP_PDM_ENABLE) { 140ceb4fcc1SVijendar Mukunda pdm_enable = ACP_PDM_DISABLE; 141ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); 142ceb4fcc1SVijendar Mukunda } 143ceb4fcc1SVijendar Mukunda acp6x_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH); 144ceb4fcc1SVijendar Mukunda return 0; 145ceb4fcc1SVijendar Mukunda } 146ceb4fcc1SVijendar Mukunda 147ceb4fcc1SVijendar Mukunda static void acp6x_config_dma(struct pdm_stream_instance *rtd, int direction) 148ceb4fcc1SVijendar Mukunda { 149ceb4fcc1SVijendar Mukunda u16 page_idx; 150ceb4fcc1SVijendar Mukunda u32 low, high, val; 151ceb4fcc1SVijendar Mukunda dma_addr_t addr; 152ceb4fcc1SVijendar Mukunda 153ceb4fcc1SVijendar Mukunda addr = rtd->dma_addr; 154ceb4fcc1SVijendar Mukunda val = PDM_PTE_OFFSET; 155ceb4fcc1SVijendar Mukunda 156ceb4fcc1SVijendar Mukunda /* Group Enable */ 157ceb4fcc1SVijendar Mukunda acp6x_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp6x_base + 158ceb4fcc1SVijendar Mukunda ACPAXI2AXI_ATU_BASE_ADDR_GRP_1); 159ceb4fcc1SVijendar Mukunda acp6x_writel(PAGE_SIZE_4K_ENABLE, rtd->acp6x_base + 160ceb4fcc1SVijendar Mukunda ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1); 161ceb4fcc1SVijendar Mukunda for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) { 162ceb4fcc1SVijendar Mukunda /* Load the low address of page int ACP SRAM through SRBM */ 163ceb4fcc1SVijendar Mukunda low = lower_32_bits(addr); 164ceb4fcc1SVijendar Mukunda high = upper_32_bits(addr); 165ceb4fcc1SVijendar Mukunda 166ceb4fcc1SVijendar Mukunda acp6x_writel(low, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val); 167ceb4fcc1SVijendar Mukunda high |= BIT(31); 168ceb4fcc1SVijendar Mukunda acp6x_writel(high, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val + 4); 169ceb4fcc1SVijendar Mukunda val += 8; 170ceb4fcc1SVijendar Mukunda addr += PAGE_SIZE; 171ceb4fcc1SVijendar Mukunda } 172ceb4fcc1SVijendar Mukunda } 173ceb4fcc1SVijendar Mukunda 174ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_open(struct snd_soc_component *component, 175ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream) 176ceb4fcc1SVijendar Mukunda { 177ceb4fcc1SVijendar Mukunda struct snd_pcm_runtime *runtime; 178ceb4fcc1SVijendar Mukunda struct pdm_dev_data *adata; 179ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *pdm_data; 180ceb4fcc1SVijendar Mukunda int ret; 181ceb4fcc1SVijendar Mukunda 182ceb4fcc1SVijendar Mukunda runtime = substream->runtime; 183ceb4fcc1SVijendar Mukunda adata = dev_get_drvdata(component->dev); 184ceb4fcc1SVijendar Mukunda pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL); 185ceb4fcc1SVijendar Mukunda if (!pdm_data) 186ceb4fcc1SVijendar Mukunda return -EINVAL; 187ceb4fcc1SVijendar Mukunda 188ceb4fcc1SVijendar Mukunda if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 189ceb4fcc1SVijendar Mukunda runtime->hw = acp6x_pdm_hardware_capture; 190ceb4fcc1SVijendar Mukunda 191ceb4fcc1SVijendar Mukunda ret = snd_pcm_hw_constraint_integer(runtime, 192ceb4fcc1SVijendar Mukunda SNDRV_PCM_HW_PARAM_PERIODS); 193ceb4fcc1SVijendar Mukunda if (ret < 0) { 194ceb4fcc1SVijendar Mukunda dev_err(component->dev, "set integer constraint failed\n"); 195ceb4fcc1SVijendar Mukunda kfree(pdm_data); 196ceb4fcc1SVijendar Mukunda return ret; 197ceb4fcc1SVijendar Mukunda } 198ceb4fcc1SVijendar Mukunda 199ceb4fcc1SVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 200ceb4fcc1SVijendar Mukunda 201ceb4fcc1SVijendar Mukunda if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 202ceb4fcc1SVijendar Mukunda adata->capture_stream = substream; 203ceb4fcc1SVijendar Mukunda 204ceb4fcc1SVijendar Mukunda pdm_data->acp6x_base = adata->acp6x_base; 205ceb4fcc1SVijendar Mukunda runtime->private_data = pdm_data; 206ceb4fcc1SVijendar Mukunda return ret; 207ceb4fcc1SVijendar Mukunda } 208ceb4fcc1SVijendar Mukunda 209ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_hw_params(struct snd_soc_component *component, 210ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream, 211ceb4fcc1SVijendar Mukunda struct snd_pcm_hw_params *params) 212ceb4fcc1SVijendar Mukunda { 213ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 214ceb4fcc1SVijendar Mukunda size_t size, period_bytes; 215ceb4fcc1SVijendar Mukunda 216ceb4fcc1SVijendar Mukunda rtd = substream->runtime->private_data; 217ceb4fcc1SVijendar Mukunda if (!rtd) 218ceb4fcc1SVijendar Mukunda return -EINVAL; 219ceb4fcc1SVijendar Mukunda size = params_buffer_bytes(params); 220ceb4fcc1SVijendar Mukunda period_bytes = params_period_bytes(params); 221ceb4fcc1SVijendar Mukunda rtd->dma_addr = substream->runtime->dma_addr; 222ceb4fcc1SVijendar Mukunda rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); 223ceb4fcc1SVijendar Mukunda acp6x_config_dma(rtd, substream->stream); 224ceb4fcc1SVijendar Mukunda acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size, 225ceb4fcc1SVijendar Mukunda period_bytes, rtd->acp6x_base); 226ceb4fcc1SVijendar Mukunda return 0; 227ceb4fcc1SVijendar Mukunda } 228ceb4fcc1SVijendar Mukunda 229ceb4fcc1SVijendar Mukunda static u64 acp6x_pdm_get_byte_count(struct pdm_stream_instance *rtd, 230ceb4fcc1SVijendar Mukunda int direction) 231ceb4fcc1SVijendar Mukunda { 232ceb4fcc1SVijendar Mukunda union acp_pdm_dma_count byte_count; 233ceb4fcc1SVijendar Mukunda 234ceb4fcc1SVijendar Mukunda byte_count.bcount.high = 235ceb4fcc1SVijendar Mukunda acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH); 236ceb4fcc1SVijendar Mukunda byte_count.bcount.low = 237ceb4fcc1SVijendar Mukunda acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW); 238ceb4fcc1SVijendar Mukunda return byte_count.bytescount; 239ceb4fcc1SVijendar Mukunda } 240ceb4fcc1SVijendar Mukunda 241ceb4fcc1SVijendar Mukunda static snd_pcm_uframes_t acp6x_pdm_dma_pointer(struct snd_soc_component *comp, 242ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *stream) 243ceb4fcc1SVijendar Mukunda { 244ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 245ceb4fcc1SVijendar Mukunda u32 pos, buffersize; 246ceb4fcc1SVijendar Mukunda u64 bytescount; 247ceb4fcc1SVijendar Mukunda 248ceb4fcc1SVijendar Mukunda rtd = stream->runtime->private_data; 249ceb4fcc1SVijendar Mukunda buffersize = frames_to_bytes(stream->runtime, 250ceb4fcc1SVijendar Mukunda stream->runtime->buffer_size); 251ceb4fcc1SVijendar Mukunda bytescount = acp6x_pdm_get_byte_count(rtd, stream->stream); 252ceb4fcc1SVijendar Mukunda if (bytescount > rtd->bytescount) 253ceb4fcc1SVijendar Mukunda bytescount -= rtd->bytescount; 254ceb4fcc1SVijendar Mukunda pos = do_div(bytescount, buffersize); 255ceb4fcc1SVijendar Mukunda return bytes_to_frames(stream->runtime, pos); 256ceb4fcc1SVijendar Mukunda } 257ceb4fcc1SVijendar Mukunda 258ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_new(struct snd_soc_component *component, 259ceb4fcc1SVijendar Mukunda struct snd_soc_pcm_runtime *rtd) 260ceb4fcc1SVijendar Mukunda { 261ceb4fcc1SVijendar Mukunda struct device *parent = component->dev->parent; 262ceb4fcc1SVijendar Mukunda 263ceb4fcc1SVijendar Mukunda snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, 264ceb4fcc1SVijendar Mukunda parent, MIN_BUFFER, MAX_BUFFER); 265ceb4fcc1SVijendar Mukunda return 0; 266ceb4fcc1SVijendar Mukunda } 267ceb4fcc1SVijendar Mukunda 268ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_close(struct snd_soc_component *component, 269ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream) 270ceb4fcc1SVijendar Mukunda { 271ceb4fcc1SVijendar Mukunda struct pdm_dev_data *adata = dev_get_drvdata(component->dev); 272ceb4fcc1SVijendar Mukunda 273ceb4fcc1SVijendar Mukunda acp6x_disable_pdm_interrupts(adata->acp6x_base); 274ceb4fcc1SVijendar Mukunda adata->capture_stream = NULL; 275ceb4fcc1SVijendar Mukunda return 0; 276ceb4fcc1SVijendar Mukunda } 277ceb4fcc1SVijendar Mukunda 278ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dai_trigger(struct snd_pcm_substream *substream, 279ceb4fcc1SVijendar Mukunda int cmd, struct snd_soc_dai *dai) 280ceb4fcc1SVijendar Mukunda { 281ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 282ceb4fcc1SVijendar Mukunda int ret; 283ceb4fcc1SVijendar Mukunda bool pdm_status; 284ceb4fcc1SVijendar Mukunda unsigned int ch_mask; 285ceb4fcc1SVijendar Mukunda 286ceb4fcc1SVijendar Mukunda rtd = substream->runtime->private_data; 287ceb4fcc1SVijendar Mukunda ret = 0; 288ceb4fcc1SVijendar Mukunda switch (substream->runtime->channels) { 289ceb4fcc1SVijendar Mukunda case TWO_CH: 290ceb4fcc1SVijendar Mukunda ch_mask = 0x00; 291ceb4fcc1SVijendar Mukunda break; 292ceb4fcc1SVijendar Mukunda default: 293ceb4fcc1SVijendar Mukunda return -EINVAL; 294ceb4fcc1SVijendar Mukunda } 295ceb4fcc1SVijendar Mukunda switch (cmd) { 296ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_START: 297ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_RESUME: 298ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 299ceb4fcc1SVijendar Mukunda acp6x_writel(ch_mask, rtd->acp6x_base + ACP_WOV_PDM_NO_OF_CHANNELS); 300ceb4fcc1SVijendar Mukunda acp6x_writel(PDM_DECIMATION_FACTOR, rtd->acp6x_base + 301ceb4fcc1SVijendar Mukunda ACP_WOV_PDM_DECIMATION_FACTOR); 302ceb4fcc1SVijendar Mukunda rtd->bytescount = acp6x_pdm_get_byte_count(rtd, substream->stream); 303ceb4fcc1SVijendar Mukunda pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base); 304ceb4fcc1SVijendar Mukunda if (!pdm_status) 305ceb4fcc1SVijendar Mukunda ret = acp6x_start_pdm_dma(rtd->acp6x_base); 306ceb4fcc1SVijendar Mukunda break; 307ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_STOP: 308ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_SUSPEND: 309ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 310ceb4fcc1SVijendar Mukunda pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base); 311ceb4fcc1SVijendar Mukunda if (pdm_status) 312ceb4fcc1SVijendar Mukunda ret = acp6x_stop_pdm_dma(rtd->acp6x_base); 313ceb4fcc1SVijendar Mukunda break; 314ceb4fcc1SVijendar Mukunda default: 315ceb4fcc1SVijendar Mukunda ret = -EINVAL; 316ceb4fcc1SVijendar Mukunda break; 317ceb4fcc1SVijendar Mukunda } 318ceb4fcc1SVijendar Mukunda return ret; 319ceb4fcc1SVijendar Mukunda } 320ceb4fcc1SVijendar Mukunda 321*7bef0010SRikard Falkeborn static const struct snd_soc_dai_ops acp6x_pdm_dai_ops = { 322ceb4fcc1SVijendar Mukunda .trigger = acp6x_pdm_dai_trigger, 323ceb4fcc1SVijendar Mukunda }; 324ceb4fcc1SVijendar Mukunda 3257610174aSVijendar Mukunda static struct snd_soc_dai_driver acp6x_pdm_dai_driver = { 3267610174aSVijendar Mukunda .capture = { 3277610174aSVijendar Mukunda .rates = SNDRV_PCM_RATE_48000, 3287610174aSVijendar Mukunda .formats = SNDRV_PCM_FMTBIT_S32_LE, 3297610174aSVijendar Mukunda .channels_min = 2, 3307610174aSVijendar Mukunda .channels_max = 2, 3317610174aSVijendar Mukunda .rate_min = 48000, 3327610174aSVijendar Mukunda .rate_max = 48000, 3337610174aSVijendar Mukunda }, 334ceb4fcc1SVijendar Mukunda .ops = &acp6x_pdm_dai_ops, 3357610174aSVijendar Mukunda }; 3367610174aSVijendar Mukunda 3377610174aSVijendar Mukunda static const struct snd_soc_component_driver acp6x_pdm_component = { 3387610174aSVijendar Mukunda .name = DRV_NAME, 339ceb4fcc1SVijendar Mukunda .open = acp6x_pdm_dma_open, 340ceb4fcc1SVijendar Mukunda .close = acp6x_pdm_dma_close, 341ceb4fcc1SVijendar Mukunda .hw_params = acp6x_pdm_dma_hw_params, 342ceb4fcc1SVijendar Mukunda .pointer = acp6x_pdm_dma_pointer, 343ceb4fcc1SVijendar Mukunda .pcm_construct = acp6x_pdm_dma_new, 3447610174aSVijendar Mukunda }; 3457610174aSVijendar Mukunda 3467610174aSVijendar Mukunda static int acp6x_pdm_audio_probe(struct platform_device *pdev) 3477610174aSVijendar Mukunda { 3487610174aSVijendar Mukunda struct resource *res; 3497610174aSVijendar Mukunda struct pdm_dev_data *adata; 3507610174aSVijendar Mukunda int status; 3517610174aSVijendar Mukunda 3527610174aSVijendar Mukunda res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 3537610174aSVijendar Mukunda if (!res) { 3547610174aSVijendar Mukunda dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); 3557610174aSVijendar Mukunda return -ENODEV; 3567610174aSVijendar Mukunda } 3577610174aSVijendar Mukunda 3587610174aSVijendar Mukunda adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL); 3597610174aSVijendar Mukunda if (!adata) 3607610174aSVijendar Mukunda return -ENOMEM; 3617610174aSVijendar Mukunda 3627610174aSVijendar Mukunda adata->acp6x_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 3637610174aSVijendar Mukunda if (!adata->acp6x_base) 3647610174aSVijendar Mukunda return -ENOMEM; 3657610174aSVijendar Mukunda 3667610174aSVijendar Mukunda adata->capture_stream = NULL; 3677610174aSVijendar Mukunda 3687610174aSVijendar Mukunda dev_set_drvdata(&pdev->dev, adata); 3697610174aSVijendar Mukunda status = devm_snd_soc_register_component(&pdev->dev, 3707610174aSVijendar Mukunda &acp6x_pdm_component, 3717610174aSVijendar Mukunda &acp6x_pdm_dai_driver, 1); 3727610174aSVijendar Mukunda if (status) { 3737610174aSVijendar Mukunda dev_err(&pdev->dev, "Fail to register acp pdm dai\n"); 3747610174aSVijendar Mukunda 3757610174aSVijendar Mukunda return -ENODEV; 3767610174aSVijendar Mukunda } 3774c2e711aSVijendar Mukunda pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS); 3784c2e711aSVijendar Mukunda pm_runtime_use_autosuspend(&pdev->dev); 3794c2e711aSVijendar Mukunda pm_runtime_enable(&pdev->dev); 3804c2e711aSVijendar Mukunda pm_runtime_allow(&pdev->dev); 3817610174aSVijendar Mukunda return 0; 3827610174aSVijendar Mukunda } 3837610174aSVijendar Mukunda 3844c2e711aSVijendar Mukunda static int acp6x_pdm_audio_remove(struct platform_device *pdev) 3854c2e711aSVijendar Mukunda { 3864c2e711aSVijendar Mukunda pm_runtime_disable(&pdev->dev); 3874c2e711aSVijendar Mukunda return 0; 3884c2e711aSVijendar Mukunda } 3894c2e711aSVijendar Mukunda 3904c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_resume(struct device *dev) 3914c2e711aSVijendar Mukunda { 3924c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 3934c2e711aSVijendar Mukunda struct snd_pcm_runtime *runtime; 3944c2e711aSVijendar Mukunda struct pdm_stream_instance *rtd; 3954c2e711aSVijendar Mukunda u32 period_bytes, buffer_len; 3964c2e711aSVijendar Mukunda 3974c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 3984c2e711aSVijendar Mukunda if (adata->capture_stream && adata->capture_stream->runtime) { 3994c2e711aSVijendar Mukunda runtime = adata->capture_stream->runtime; 4004c2e711aSVijendar Mukunda rtd = runtime->private_data; 4014c2e711aSVijendar Mukunda period_bytes = frames_to_bytes(runtime, runtime->period_size); 4024c2e711aSVijendar Mukunda buffer_len = frames_to_bytes(runtime, runtime->buffer_size); 4034c2e711aSVijendar Mukunda acp6x_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE); 4044c2e711aSVijendar Mukunda acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len, 4054c2e711aSVijendar Mukunda period_bytes, adata->acp6x_base); 4064c2e711aSVijendar Mukunda } 4074c2e711aSVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 4084c2e711aSVijendar Mukunda return 0; 4094c2e711aSVijendar Mukunda } 4104c2e711aSVijendar Mukunda 4114c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_suspend(struct device *dev) 4124c2e711aSVijendar Mukunda { 4134c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 4144c2e711aSVijendar Mukunda 4154c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 4164c2e711aSVijendar Mukunda acp6x_disable_pdm_interrupts(adata->acp6x_base); 4174c2e711aSVijendar Mukunda return 0; 4184c2e711aSVijendar Mukunda } 4194c2e711aSVijendar Mukunda 4204c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_runtime_resume(struct device *dev) 4214c2e711aSVijendar Mukunda { 4224c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 4234c2e711aSVijendar Mukunda 4244c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 4254c2e711aSVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 4264c2e711aSVijendar Mukunda return 0; 4274c2e711aSVijendar Mukunda } 4284c2e711aSVijendar Mukunda 4294c2e711aSVijendar Mukunda static const struct dev_pm_ops acp6x_pdm_pm_ops = { 4304c2e711aSVijendar Mukunda SET_RUNTIME_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_runtime_resume, NULL) 4314c2e711aSVijendar Mukunda SET_SYSTEM_SLEEP_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_resume) 4324c2e711aSVijendar Mukunda }; 4334c2e711aSVijendar Mukunda 4347610174aSVijendar Mukunda static struct platform_driver acp6x_pdm_dma_driver = { 4357610174aSVijendar Mukunda .probe = acp6x_pdm_audio_probe, 4364c2e711aSVijendar Mukunda .remove = acp6x_pdm_audio_remove, 4377610174aSVijendar Mukunda .driver = { 4387610174aSVijendar Mukunda .name = "acp_yc_pdm_dma", 4394c2e711aSVijendar Mukunda .pm = &acp6x_pdm_pm_ops, 4407610174aSVijendar Mukunda }, 4417610174aSVijendar Mukunda }; 4427610174aSVijendar Mukunda 4437610174aSVijendar Mukunda module_platform_driver(acp6x_pdm_dma_driver); 4447610174aSVijendar Mukunda 4457610174aSVijendar Mukunda MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 4467610174aSVijendar Mukunda MODULE_DESCRIPTION("AMD ACP6x YC PDM Driver"); 4477610174aSVijendar Mukunda MODULE_LICENSE("GPL v2"); 4487610174aSVijendar Mukunda MODULE_ALIAS("platform:" DRV_NAME); 449