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> 1002ea45d1SMario Limonciello #include <linux/bitfield.h> 117610174aSVijendar Mukunda #include <linux/err.h> 127610174aSVijendar Mukunda #include <linux/io.h> 137610174aSVijendar Mukunda #include <sound/pcm_params.h> 147610174aSVijendar Mukunda #include <sound/soc.h> 157610174aSVijendar Mukunda #include <sound/soc-dai.h> 164c2e711aSVijendar Mukunda #include <linux/pm_runtime.h> 177610174aSVijendar Mukunda 187610174aSVijendar Mukunda #include "acp6x.h" 197610174aSVijendar Mukunda 207610174aSVijendar Mukunda #define DRV_NAME "acp_yc_pdm_dma" 217610174aSVijendar Mukunda 2202ea45d1SMario Limonciello static int pdm_gain = 3; 2302ea45d1SMario Limonciello module_param(pdm_gain, int, 0644); 2402ea45d1SMario Limonciello MODULE_PARM_DESC(pdm_gain, "Gain control (0-3)"); 2502ea45d1SMario Limonciello 26ceb4fcc1SVijendar Mukunda static const struct snd_pcm_hardware acp6x_pdm_hardware_capture = { 27ceb4fcc1SVijendar Mukunda .info = SNDRV_PCM_INFO_INTERLEAVED | 28ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_BLOCK_TRANSFER | 29ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_MMAP | 30ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_MMAP_VALID | 31ceb4fcc1SVijendar Mukunda SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 32ceb4fcc1SVijendar Mukunda .formats = SNDRV_PCM_FMTBIT_S32_LE, 33ceb4fcc1SVijendar Mukunda .channels_min = 2, 34ceb4fcc1SVijendar Mukunda .channels_max = 2, 35ceb4fcc1SVijendar Mukunda .rates = SNDRV_PCM_RATE_48000, 36ceb4fcc1SVijendar Mukunda .rate_min = 48000, 37ceb4fcc1SVijendar Mukunda .rate_max = 48000, 38ceb4fcc1SVijendar Mukunda .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 39ceb4fcc1SVijendar Mukunda .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 40ceb4fcc1SVijendar Mukunda .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 41ceb4fcc1SVijendar Mukunda .periods_min = CAPTURE_MIN_NUM_PERIODS, 42ceb4fcc1SVijendar Mukunda .periods_max = CAPTURE_MAX_NUM_PERIODS, 43ceb4fcc1SVijendar Mukunda }; 44ceb4fcc1SVijendar Mukunda 45ceb4fcc1SVijendar Mukunda static void acp6x_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size, 46ceb4fcc1SVijendar Mukunda u32 watermark_size, void __iomem *acp_base) 47ceb4fcc1SVijendar Mukunda { 48ceb4fcc1SVijendar Mukunda acp6x_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR); 49ceb4fcc1SVijendar Mukunda acp6x_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE); 50ceb4fcc1SVijendar Mukunda acp6x_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE); 51ceb4fcc1SVijendar Mukunda acp6x_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL); 52ceb4fcc1SVijendar Mukunda } 53ceb4fcc1SVijendar Mukunda 54ceb4fcc1SVijendar Mukunda static void acp6x_enable_pdm_clock(void __iomem *acp_base) 55ceb4fcc1SVijendar Mukunda { 56ceb4fcc1SVijendar Mukunda u32 pdm_clk_enable, pdm_ctrl; 57ceb4fcc1SVijendar Mukunda 58ceb4fcc1SVijendar Mukunda pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK; 59ceb4fcc1SVijendar Mukunda pdm_ctrl = 0x00; 60ceb4fcc1SVijendar Mukunda 61ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL); 62ceb4fcc1SVijendar Mukunda pdm_ctrl = acp6x_readl(acp_base + ACP_WOV_MISC_CTRL); 6302ea45d1SMario Limonciello pdm_ctrl &= ~ACP_WOV_GAIN_CONTROL; 6402ea45d1SMario Limonciello pdm_ctrl |= FIELD_PREP(ACP_WOV_GAIN_CONTROL, clamp(pdm_gain, 0, 3)); 65ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL); 66ceb4fcc1SVijendar Mukunda } 67ceb4fcc1SVijendar Mukunda 68ceb4fcc1SVijendar Mukunda static void acp6x_enable_pdm_interrupts(void __iomem *acp_base) 69ceb4fcc1SVijendar Mukunda { 70ceb4fcc1SVijendar Mukunda u32 ext_int_ctrl; 71ceb4fcc1SVijendar Mukunda 72ceb4fcc1SVijendar Mukunda ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); 73ceb4fcc1SVijendar Mukunda ext_int_ctrl |= PDM_DMA_INTR_MASK; 74ceb4fcc1SVijendar Mukunda acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); 75ceb4fcc1SVijendar Mukunda } 76ceb4fcc1SVijendar Mukunda 77ceb4fcc1SVijendar Mukunda static void acp6x_disable_pdm_interrupts(void __iomem *acp_base) 78ceb4fcc1SVijendar Mukunda { 79ceb4fcc1SVijendar Mukunda u32 ext_int_ctrl; 80ceb4fcc1SVijendar Mukunda 81ceb4fcc1SVijendar Mukunda ext_int_ctrl = acp6x_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); 82ceb4fcc1SVijendar Mukunda ext_int_ctrl &= ~PDM_DMA_INTR_MASK; 83ceb4fcc1SVijendar Mukunda acp6x_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); 84ceb4fcc1SVijendar Mukunda } 85ceb4fcc1SVijendar Mukunda 86ceb4fcc1SVijendar Mukunda static bool acp6x_check_pdm_dma_status(void __iomem *acp_base) 87ceb4fcc1SVijendar Mukunda { 88ceb4fcc1SVijendar Mukunda bool pdm_dma_status; 89ceb4fcc1SVijendar Mukunda u32 pdm_enable, pdm_dma_enable; 90ceb4fcc1SVijendar Mukunda 91ceb4fcc1SVijendar Mukunda pdm_dma_status = false; 92ceb4fcc1SVijendar Mukunda pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE); 93ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 94ceb4fcc1SVijendar Mukunda if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS)) 95ceb4fcc1SVijendar Mukunda pdm_dma_status = true; 96ceb4fcc1SVijendar Mukunda 97ceb4fcc1SVijendar Mukunda return pdm_dma_status; 98ceb4fcc1SVijendar Mukunda } 99ceb4fcc1SVijendar Mukunda 100ceb4fcc1SVijendar Mukunda static int acp6x_start_pdm_dma(void __iomem *acp_base) 101ceb4fcc1SVijendar Mukunda { 102ceb4fcc1SVijendar Mukunda u32 pdm_enable; 103ceb4fcc1SVijendar Mukunda u32 pdm_dma_enable; 104ceb4fcc1SVijendar Mukunda int timeout; 105ceb4fcc1SVijendar Mukunda 106ceb4fcc1SVijendar Mukunda pdm_enable = 0x01; 107ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x01; 108ceb4fcc1SVijendar Mukunda 109ceb4fcc1SVijendar Mukunda acp6x_enable_pdm_clock(acp_base); 110ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); 111ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); 112ceb4fcc1SVijendar Mukunda timeout = 0; 113ceb4fcc1SVijendar Mukunda while (++timeout < ACP_COUNTER) { 114ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 115ceb4fcc1SVijendar Mukunda if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS) 116ceb4fcc1SVijendar Mukunda return 0; 117ceb4fcc1SVijendar Mukunda udelay(DELAY_US); 118ceb4fcc1SVijendar Mukunda } 119ceb4fcc1SVijendar Mukunda return -ETIMEDOUT; 120ceb4fcc1SVijendar Mukunda } 121ceb4fcc1SVijendar Mukunda 122ceb4fcc1SVijendar Mukunda static int acp6x_stop_pdm_dma(void __iomem *acp_base) 123ceb4fcc1SVijendar Mukunda { 124ceb4fcc1SVijendar Mukunda u32 pdm_enable, pdm_dma_enable; 125ceb4fcc1SVijendar Mukunda int timeout; 126ceb4fcc1SVijendar Mukunda 127ceb4fcc1SVijendar Mukunda pdm_enable = 0x00; 128ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x00; 129ceb4fcc1SVijendar Mukunda 130ceb4fcc1SVijendar Mukunda pdm_enable = acp6x_readl(acp_base + ACP_WOV_PDM_ENABLE); 131ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 132ceb4fcc1SVijendar Mukunda if (pdm_dma_enable & 0x01) { 133ceb4fcc1SVijendar Mukunda pdm_dma_enable = 0x02; 134ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE); 135ceb4fcc1SVijendar Mukunda timeout = 0; 136ceb4fcc1SVijendar Mukunda while (++timeout < ACP_COUNTER) { 137ceb4fcc1SVijendar Mukunda pdm_dma_enable = acp6x_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE); 138ceb4fcc1SVijendar Mukunda if ((pdm_dma_enable & 0x02) == 0x00) 139ceb4fcc1SVijendar Mukunda break; 140ceb4fcc1SVijendar Mukunda udelay(DELAY_US); 141ceb4fcc1SVijendar Mukunda } 142ceb4fcc1SVijendar Mukunda if (timeout == ACP_COUNTER) 143ceb4fcc1SVijendar Mukunda return -ETIMEDOUT; 144ceb4fcc1SVijendar Mukunda } 145ceb4fcc1SVijendar Mukunda if (pdm_enable == ACP_PDM_ENABLE) { 146ceb4fcc1SVijendar Mukunda pdm_enable = ACP_PDM_DISABLE; 147ceb4fcc1SVijendar Mukunda acp6x_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE); 148ceb4fcc1SVijendar Mukunda } 149ceb4fcc1SVijendar Mukunda acp6x_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH); 150ceb4fcc1SVijendar Mukunda return 0; 151ceb4fcc1SVijendar Mukunda } 152ceb4fcc1SVijendar Mukunda 153ceb4fcc1SVijendar Mukunda static void acp6x_config_dma(struct pdm_stream_instance *rtd, int direction) 154ceb4fcc1SVijendar Mukunda { 155ceb4fcc1SVijendar Mukunda u16 page_idx; 156ceb4fcc1SVijendar Mukunda u32 low, high, val; 157ceb4fcc1SVijendar Mukunda dma_addr_t addr; 158ceb4fcc1SVijendar Mukunda 159ceb4fcc1SVijendar Mukunda addr = rtd->dma_addr; 160ceb4fcc1SVijendar Mukunda val = PDM_PTE_OFFSET; 161ceb4fcc1SVijendar Mukunda 162ceb4fcc1SVijendar Mukunda /* Group Enable */ 163ceb4fcc1SVijendar Mukunda acp6x_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp6x_base + 164ceb4fcc1SVijendar Mukunda ACPAXI2AXI_ATU_BASE_ADDR_GRP_1); 165ceb4fcc1SVijendar Mukunda acp6x_writel(PAGE_SIZE_4K_ENABLE, rtd->acp6x_base + 166ceb4fcc1SVijendar Mukunda ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1); 167ceb4fcc1SVijendar Mukunda for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) { 168ceb4fcc1SVijendar Mukunda /* Load the low address of page int ACP SRAM through SRBM */ 169ceb4fcc1SVijendar Mukunda low = lower_32_bits(addr); 170ceb4fcc1SVijendar Mukunda high = upper_32_bits(addr); 171ceb4fcc1SVijendar Mukunda 172ceb4fcc1SVijendar Mukunda acp6x_writel(low, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val); 173ceb4fcc1SVijendar Mukunda high |= BIT(31); 174ceb4fcc1SVijendar Mukunda acp6x_writel(high, rtd->acp6x_base + ACP_SCRATCH_REG_0 + val + 4); 175ceb4fcc1SVijendar Mukunda val += 8; 176ceb4fcc1SVijendar Mukunda addr += PAGE_SIZE; 177ceb4fcc1SVijendar Mukunda } 178ceb4fcc1SVijendar Mukunda } 179ceb4fcc1SVijendar Mukunda 180ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_open(struct snd_soc_component *component, 181ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream) 182ceb4fcc1SVijendar Mukunda { 183ceb4fcc1SVijendar Mukunda struct snd_pcm_runtime *runtime; 184ceb4fcc1SVijendar Mukunda struct pdm_dev_data *adata; 185ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *pdm_data; 186ceb4fcc1SVijendar Mukunda int ret; 187ceb4fcc1SVijendar Mukunda 188ceb4fcc1SVijendar Mukunda runtime = substream->runtime; 189ceb4fcc1SVijendar Mukunda adata = dev_get_drvdata(component->dev); 190ceb4fcc1SVijendar Mukunda pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL); 191ceb4fcc1SVijendar Mukunda if (!pdm_data) 192ceb4fcc1SVijendar Mukunda return -EINVAL; 193ceb4fcc1SVijendar Mukunda 194ceb4fcc1SVijendar Mukunda if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 195ceb4fcc1SVijendar Mukunda runtime->hw = acp6x_pdm_hardware_capture; 196ceb4fcc1SVijendar Mukunda 197ceb4fcc1SVijendar Mukunda ret = snd_pcm_hw_constraint_integer(runtime, 198ceb4fcc1SVijendar Mukunda SNDRV_PCM_HW_PARAM_PERIODS); 199ceb4fcc1SVijendar Mukunda if (ret < 0) { 200ceb4fcc1SVijendar Mukunda dev_err(component->dev, "set integer constraint failed\n"); 201ceb4fcc1SVijendar Mukunda kfree(pdm_data); 202ceb4fcc1SVijendar Mukunda return ret; 203ceb4fcc1SVijendar Mukunda } 204ceb4fcc1SVijendar Mukunda 205ceb4fcc1SVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 206ceb4fcc1SVijendar Mukunda 207ceb4fcc1SVijendar Mukunda if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 208ceb4fcc1SVijendar Mukunda adata->capture_stream = substream; 209ceb4fcc1SVijendar Mukunda 210ceb4fcc1SVijendar Mukunda pdm_data->acp6x_base = adata->acp6x_base; 211ceb4fcc1SVijendar Mukunda runtime->private_data = pdm_data; 212ceb4fcc1SVijendar Mukunda return ret; 213ceb4fcc1SVijendar Mukunda } 214ceb4fcc1SVijendar Mukunda 215ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_hw_params(struct snd_soc_component *component, 216ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream, 217ceb4fcc1SVijendar Mukunda struct snd_pcm_hw_params *params) 218ceb4fcc1SVijendar Mukunda { 219ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 220ceb4fcc1SVijendar Mukunda size_t size, period_bytes; 221ceb4fcc1SVijendar Mukunda 222ceb4fcc1SVijendar Mukunda rtd = substream->runtime->private_data; 223ceb4fcc1SVijendar Mukunda if (!rtd) 224ceb4fcc1SVijendar Mukunda return -EINVAL; 225ceb4fcc1SVijendar Mukunda size = params_buffer_bytes(params); 226ceb4fcc1SVijendar Mukunda period_bytes = params_period_bytes(params); 227ceb4fcc1SVijendar Mukunda rtd->dma_addr = substream->runtime->dma_addr; 228ceb4fcc1SVijendar Mukunda rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); 229ceb4fcc1SVijendar Mukunda acp6x_config_dma(rtd, substream->stream); 230ceb4fcc1SVijendar Mukunda acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size, 231ceb4fcc1SVijendar Mukunda period_bytes, rtd->acp6x_base); 232ceb4fcc1SVijendar Mukunda return 0; 233ceb4fcc1SVijendar Mukunda } 234ceb4fcc1SVijendar Mukunda 235ceb4fcc1SVijendar Mukunda static u64 acp6x_pdm_get_byte_count(struct pdm_stream_instance *rtd, 236ceb4fcc1SVijendar Mukunda int direction) 237ceb4fcc1SVijendar Mukunda { 238ceb4fcc1SVijendar Mukunda union acp_pdm_dma_count byte_count; 239ceb4fcc1SVijendar Mukunda 240ceb4fcc1SVijendar Mukunda byte_count.bcount.high = 241ceb4fcc1SVijendar Mukunda acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH); 242ceb4fcc1SVijendar Mukunda byte_count.bcount.low = 243ceb4fcc1SVijendar Mukunda acp6x_readl(rtd->acp6x_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW); 244ceb4fcc1SVijendar Mukunda return byte_count.bytescount; 245ceb4fcc1SVijendar Mukunda } 246ceb4fcc1SVijendar Mukunda 247ceb4fcc1SVijendar Mukunda static snd_pcm_uframes_t acp6x_pdm_dma_pointer(struct snd_soc_component *comp, 248ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *stream) 249ceb4fcc1SVijendar Mukunda { 250ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 251ceb4fcc1SVijendar Mukunda u32 pos, buffersize; 252ceb4fcc1SVijendar Mukunda u64 bytescount; 253ceb4fcc1SVijendar Mukunda 254ceb4fcc1SVijendar Mukunda rtd = stream->runtime->private_data; 255ceb4fcc1SVijendar Mukunda buffersize = frames_to_bytes(stream->runtime, 256ceb4fcc1SVijendar Mukunda stream->runtime->buffer_size); 257ceb4fcc1SVijendar Mukunda bytescount = acp6x_pdm_get_byte_count(rtd, stream->stream); 258ceb4fcc1SVijendar Mukunda if (bytescount > rtd->bytescount) 259ceb4fcc1SVijendar Mukunda bytescount -= rtd->bytescount; 260ceb4fcc1SVijendar Mukunda pos = do_div(bytescount, buffersize); 261ceb4fcc1SVijendar Mukunda return bytes_to_frames(stream->runtime, pos); 262ceb4fcc1SVijendar Mukunda } 263ceb4fcc1SVijendar Mukunda 264ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_new(struct snd_soc_component *component, 265ceb4fcc1SVijendar Mukunda struct snd_soc_pcm_runtime *rtd) 266ceb4fcc1SVijendar Mukunda { 267ceb4fcc1SVijendar Mukunda struct device *parent = component->dev->parent; 268ceb4fcc1SVijendar Mukunda 269ceb4fcc1SVijendar Mukunda snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, 270ceb4fcc1SVijendar Mukunda parent, MIN_BUFFER, MAX_BUFFER); 271ceb4fcc1SVijendar Mukunda return 0; 272ceb4fcc1SVijendar Mukunda } 273ceb4fcc1SVijendar Mukunda 274ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dma_close(struct snd_soc_component *component, 275ceb4fcc1SVijendar Mukunda struct snd_pcm_substream *substream) 276ceb4fcc1SVijendar Mukunda { 277ceb4fcc1SVijendar Mukunda struct pdm_dev_data *adata = dev_get_drvdata(component->dev); 278ceb4fcc1SVijendar Mukunda 279ceb4fcc1SVijendar Mukunda acp6x_disable_pdm_interrupts(adata->acp6x_base); 280ceb4fcc1SVijendar Mukunda adata->capture_stream = NULL; 281ceb4fcc1SVijendar Mukunda return 0; 282ceb4fcc1SVijendar Mukunda } 283ceb4fcc1SVijendar Mukunda 284ceb4fcc1SVijendar Mukunda static int acp6x_pdm_dai_trigger(struct snd_pcm_substream *substream, 285ceb4fcc1SVijendar Mukunda int cmd, struct snd_soc_dai *dai) 286ceb4fcc1SVijendar Mukunda { 287ceb4fcc1SVijendar Mukunda struct pdm_stream_instance *rtd; 288ceb4fcc1SVijendar Mukunda int ret; 289ceb4fcc1SVijendar Mukunda bool pdm_status; 290ceb4fcc1SVijendar Mukunda unsigned int ch_mask; 291ceb4fcc1SVijendar Mukunda 292ceb4fcc1SVijendar Mukunda rtd = substream->runtime->private_data; 293ceb4fcc1SVijendar Mukunda ret = 0; 294ceb4fcc1SVijendar Mukunda switch (substream->runtime->channels) { 295ceb4fcc1SVijendar Mukunda case TWO_CH: 296ceb4fcc1SVijendar Mukunda ch_mask = 0x00; 297ceb4fcc1SVijendar Mukunda break; 298ceb4fcc1SVijendar Mukunda default: 299ceb4fcc1SVijendar Mukunda return -EINVAL; 300ceb4fcc1SVijendar Mukunda } 301ceb4fcc1SVijendar Mukunda switch (cmd) { 302ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_START: 303ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_RESUME: 304ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 305ceb4fcc1SVijendar Mukunda acp6x_writel(ch_mask, rtd->acp6x_base + ACP_WOV_PDM_NO_OF_CHANNELS); 306ceb4fcc1SVijendar Mukunda acp6x_writel(PDM_DECIMATION_FACTOR, rtd->acp6x_base + 307ceb4fcc1SVijendar Mukunda ACP_WOV_PDM_DECIMATION_FACTOR); 308ceb4fcc1SVijendar Mukunda rtd->bytescount = acp6x_pdm_get_byte_count(rtd, substream->stream); 309ceb4fcc1SVijendar Mukunda pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base); 310ceb4fcc1SVijendar Mukunda if (!pdm_status) 311ceb4fcc1SVijendar Mukunda ret = acp6x_start_pdm_dma(rtd->acp6x_base); 312ceb4fcc1SVijendar Mukunda break; 313ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_STOP: 314ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_SUSPEND: 315ceb4fcc1SVijendar Mukunda case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 316ceb4fcc1SVijendar Mukunda pdm_status = acp6x_check_pdm_dma_status(rtd->acp6x_base); 317ceb4fcc1SVijendar Mukunda if (pdm_status) 318ceb4fcc1SVijendar Mukunda ret = acp6x_stop_pdm_dma(rtd->acp6x_base); 319ceb4fcc1SVijendar Mukunda break; 320ceb4fcc1SVijendar Mukunda default: 321ceb4fcc1SVijendar Mukunda ret = -EINVAL; 322ceb4fcc1SVijendar Mukunda break; 323ceb4fcc1SVijendar Mukunda } 324ceb4fcc1SVijendar Mukunda return ret; 325ceb4fcc1SVijendar Mukunda } 326ceb4fcc1SVijendar Mukunda 3277bef0010SRikard Falkeborn static const struct snd_soc_dai_ops acp6x_pdm_dai_ops = { 328ceb4fcc1SVijendar Mukunda .trigger = acp6x_pdm_dai_trigger, 329ceb4fcc1SVijendar Mukunda }; 330ceb4fcc1SVijendar Mukunda 3317610174aSVijendar Mukunda static struct snd_soc_dai_driver acp6x_pdm_dai_driver = { 3327610174aSVijendar Mukunda .capture = { 3337610174aSVijendar Mukunda .rates = SNDRV_PCM_RATE_48000, 3347610174aSVijendar Mukunda .formats = SNDRV_PCM_FMTBIT_S32_LE, 3357610174aSVijendar Mukunda .channels_min = 2, 3367610174aSVijendar Mukunda .channels_max = 2, 3377610174aSVijendar Mukunda .rate_min = 48000, 3387610174aSVijendar Mukunda .rate_max = 48000, 3397610174aSVijendar Mukunda }, 340ceb4fcc1SVijendar Mukunda .ops = &acp6x_pdm_dai_ops, 3417610174aSVijendar Mukunda }; 3427610174aSVijendar Mukunda 3437610174aSVijendar Mukunda static const struct snd_soc_component_driver acp6x_pdm_component = { 3447610174aSVijendar Mukunda .name = DRV_NAME, 345ceb4fcc1SVijendar Mukunda .open = acp6x_pdm_dma_open, 346ceb4fcc1SVijendar Mukunda .close = acp6x_pdm_dma_close, 347ceb4fcc1SVijendar Mukunda .hw_params = acp6x_pdm_dma_hw_params, 348ceb4fcc1SVijendar Mukunda .pointer = acp6x_pdm_dma_pointer, 349ceb4fcc1SVijendar Mukunda .pcm_construct = acp6x_pdm_dma_new, 3500bc1e7d1SCharles Keepax .legacy_dai_naming = 1, 3517610174aSVijendar Mukunda }; 3527610174aSVijendar Mukunda 3537610174aSVijendar Mukunda static int acp6x_pdm_audio_probe(struct platform_device *pdev) 3547610174aSVijendar Mukunda { 3557610174aSVijendar Mukunda struct resource *res; 3567610174aSVijendar Mukunda struct pdm_dev_data *adata; 3577610174aSVijendar Mukunda int status; 3587610174aSVijendar Mukunda 3597610174aSVijendar Mukunda res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 3607610174aSVijendar Mukunda if (!res) { 3617610174aSVijendar Mukunda dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); 3627610174aSVijendar Mukunda return -ENODEV; 3637610174aSVijendar Mukunda } 3647610174aSVijendar Mukunda 3657610174aSVijendar Mukunda adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL); 3667610174aSVijendar Mukunda if (!adata) 3677610174aSVijendar Mukunda return -ENOMEM; 3687610174aSVijendar Mukunda 3697610174aSVijendar Mukunda adata->acp6x_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 3707610174aSVijendar Mukunda if (!adata->acp6x_base) 3717610174aSVijendar Mukunda return -ENOMEM; 3727610174aSVijendar Mukunda 3737610174aSVijendar Mukunda adata->capture_stream = NULL; 3747610174aSVijendar Mukunda 3757610174aSVijendar Mukunda dev_set_drvdata(&pdev->dev, adata); 3767610174aSVijendar Mukunda status = devm_snd_soc_register_component(&pdev->dev, 3777610174aSVijendar Mukunda &acp6x_pdm_component, 3787610174aSVijendar Mukunda &acp6x_pdm_dai_driver, 1); 3797610174aSVijendar Mukunda if (status) { 3807610174aSVijendar Mukunda dev_err(&pdev->dev, "Fail to register acp pdm dai\n"); 3817610174aSVijendar Mukunda 3827610174aSVijendar Mukunda return -ENODEV; 3837610174aSVijendar Mukunda } 3844c2e711aSVijendar Mukunda pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS); 3854c2e711aSVijendar Mukunda pm_runtime_use_autosuspend(&pdev->dev); 3864c2e711aSVijendar Mukunda pm_runtime_enable(&pdev->dev); 3874c2e711aSVijendar Mukunda pm_runtime_allow(&pdev->dev); 3887610174aSVijendar Mukunda return 0; 3897610174aSVijendar Mukunda } 3907610174aSVijendar Mukunda 391*0e940c75SUwe Kleine-König static void acp6x_pdm_audio_remove(struct platform_device *pdev) 3924c2e711aSVijendar Mukunda { 3934c2e711aSVijendar Mukunda pm_runtime_disable(&pdev->dev); 3944c2e711aSVijendar Mukunda } 3954c2e711aSVijendar Mukunda 3964c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_resume(struct device *dev) 3974c2e711aSVijendar Mukunda { 3984c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 3994c2e711aSVijendar Mukunda struct snd_pcm_runtime *runtime; 4004c2e711aSVijendar Mukunda struct pdm_stream_instance *rtd; 4014c2e711aSVijendar Mukunda u32 period_bytes, buffer_len; 4024c2e711aSVijendar Mukunda 4034c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 4044c2e711aSVijendar Mukunda if (adata->capture_stream && adata->capture_stream->runtime) { 4054c2e711aSVijendar Mukunda runtime = adata->capture_stream->runtime; 4064c2e711aSVijendar Mukunda rtd = runtime->private_data; 4074c2e711aSVijendar Mukunda period_bytes = frames_to_bytes(runtime, runtime->period_size); 4084c2e711aSVijendar Mukunda buffer_len = frames_to_bytes(runtime, runtime->buffer_size); 4094c2e711aSVijendar Mukunda acp6x_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE); 4104c2e711aSVijendar Mukunda acp6x_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len, 4114c2e711aSVijendar Mukunda period_bytes, adata->acp6x_base); 4124c2e711aSVijendar Mukunda } 4134c2e711aSVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 4144c2e711aSVijendar Mukunda return 0; 4154c2e711aSVijendar Mukunda } 4164c2e711aSVijendar Mukunda 4174c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_suspend(struct device *dev) 4184c2e711aSVijendar Mukunda { 4194c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 4204c2e711aSVijendar Mukunda 4214c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 4224c2e711aSVijendar Mukunda acp6x_disable_pdm_interrupts(adata->acp6x_base); 4234c2e711aSVijendar Mukunda return 0; 4244c2e711aSVijendar Mukunda } 4254c2e711aSVijendar Mukunda 4264c2e711aSVijendar Mukunda static int __maybe_unused acp6x_pdm_runtime_resume(struct device *dev) 4274c2e711aSVijendar Mukunda { 4284c2e711aSVijendar Mukunda struct pdm_dev_data *adata; 4294c2e711aSVijendar Mukunda 4304c2e711aSVijendar Mukunda adata = dev_get_drvdata(dev); 4314c2e711aSVijendar Mukunda acp6x_enable_pdm_interrupts(adata->acp6x_base); 4324c2e711aSVijendar Mukunda return 0; 4334c2e711aSVijendar Mukunda } 4344c2e711aSVijendar Mukunda 4354c2e711aSVijendar Mukunda static const struct dev_pm_ops acp6x_pdm_pm_ops = { 4364c2e711aSVijendar Mukunda SET_RUNTIME_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_runtime_resume, NULL) 4374c2e711aSVijendar Mukunda SET_SYSTEM_SLEEP_PM_OPS(acp6x_pdm_suspend, acp6x_pdm_resume) 4384c2e711aSVijendar Mukunda }; 4394c2e711aSVijendar Mukunda 4407610174aSVijendar Mukunda static struct platform_driver acp6x_pdm_dma_driver = { 4417610174aSVijendar Mukunda .probe = acp6x_pdm_audio_probe, 442*0e940c75SUwe Kleine-König .remove_new = acp6x_pdm_audio_remove, 4437610174aSVijendar Mukunda .driver = { 4447610174aSVijendar Mukunda .name = "acp_yc_pdm_dma", 4454c2e711aSVijendar Mukunda .pm = &acp6x_pdm_pm_ops, 4467610174aSVijendar Mukunda }, 4477610174aSVijendar Mukunda }; 4487610174aSVijendar Mukunda 4497610174aSVijendar Mukunda module_platform_driver(acp6x_pdm_dma_driver); 4507610174aSVijendar Mukunda 4517610174aSVijendar Mukunda MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 4527610174aSVijendar Mukunda MODULE_DESCRIPTION("AMD ACP6x YC PDM Driver"); 4537610174aSVijendar Mukunda MODULE_LICENSE("GPL v2"); 4547610174aSVijendar Mukunda MODULE_ALIAS("platform:" DRV_NAME); 455