133cea6bbSSyed Saba Kareem // SPDX-License-Identifier: GPL-2.0+
233cea6bbSSyed Saba Kareem /*
333cea6bbSSyed Saba Kareem * AMD ALSA SoC Pink Sardine PDM Driver
433cea6bbSSyed Saba Kareem *
533cea6bbSSyed Saba Kareem * Copyright 2022 Advanced Micro Devices, Inc.
633cea6bbSSyed Saba Kareem */
733cea6bbSSyed Saba Kareem
833cea6bbSSyed Saba Kareem #include <linux/platform_device.h>
933cea6bbSSyed Saba Kareem #include <linux/module.h>
105579a966SMario Limonciello #include <linux/bitfield.h>
1133cea6bbSSyed Saba Kareem #include <linux/err.h>
1233cea6bbSSyed Saba Kareem #include <linux/io.h>
1333cea6bbSSyed Saba Kareem #include <sound/pcm_params.h>
1433cea6bbSSyed Saba Kareem #include <sound/soc.h>
1533cea6bbSSyed Saba Kareem #include <sound/soc-dai.h>
1628023a78SSyed Saba Kareem #include <linux/pm_runtime.h>
1733cea6bbSSyed Saba Kareem
184b192114Ssyed saba kareem #include "acp63.h"
1933cea6bbSSyed Saba Kareem
2033cea6bbSSyed Saba Kareem #define DRV_NAME "acp_ps_pdm_dma"
2133cea6bbSSyed Saba Kareem
225579a966SMario Limonciello static int pdm_gain = 3;
235579a966SMario Limonciello module_param(pdm_gain, int, 0644);
245579a966SMario Limonciello MODULE_PARM_DESC(pdm_gain, "Gain control (0-3)");
255579a966SMario Limonciello
264b192114Ssyed saba kareem static const struct snd_pcm_hardware acp63_pdm_hardware_capture = {
2751373056SSyed Saba Kareem .info = SNDRV_PCM_INFO_INTERLEAVED |
2851373056SSyed Saba Kareem SNDRV_PCM_INFO_BLOCK_TRANSFER |
2951373056SSyed Saba Kareem SNDRV_PCM_INFO_MMAP |
3051373056SSyed Saba Kareem SNDRV_PCM_INFO_MMAP_VALID |
3151373056SSyed Saba Kareem SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
3251373056SSyed Saba Kareem .formats = SNDRV_PCM_FMTBIT_S32_LE,
3351373056SSyed Saba Kareem .channels_min = 2,
3451373056SSyed Saba Kareem .channels_max = 2,
3551373056SSyed Saba Kareem .rates = SNDRV_PCM_RATE_48000,
3651373056SSyed Saba Kareem .rate_min = 48000,
3751373056SSyed Saba Kareem .rate_max = 48000,
3851373056SSyed Saba Kareem .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
3951373056SSyed Saba Kareem .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
4051373056SSyed Saba Kareem .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
4151373056SSyed Saba Kareem .periods_min = CAPTURE_MIN_NUM_PERIODS,
4251373056SSyed Saba Kareem .periods_max = CAPTURE_MAX_NUM_PERIODS,
4351373056SSyed Saba Kareem };
4451373056SSyed Saba Kareem
acp63_init_pdm_ring_buffer(u32 physical_addr,u32 buffer_size,u32 watermark_size,void __iomem * acp_base)454b192114Ssyed saba kareem static void acp63_init_pdm_ring_buffer(u32 physical_addr, u32 buffer_size,
4651373056SSyed Saba Kareem u32 watermark_size, void __iomem *acp_base)
4751373056SSyed Saba Kareem {
48ec54f810SSyed Saba Kareem writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR);
49ec54f810SSyed Saba Kareem writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE);
50ec54f810SSyed Saba Kareem writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
51ec54f810SSyed Saba Kareem writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
5251373056SSyed Saba Kareem }
5351373056SSyed Saba Kareem
acp63_enable_pdm_clock(void __iomem * acp_base)544b192114Ssyed saba kareem static void acp63_enable_pdm_clock(void __iomem *acp_base)
5551373056SSyed Saba Kareem {
5651373056SSyed Saba Kareem u32 pdm_clk_enable, pdm_ctrl;
5751373056SSyed Saba Kareem
5851373056SSyed Saba Kareem pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK;
5951373056SSyed Saba Kareem pdm_ctrl = 0x00;
6051373056SSyed Saba Kareem
61ec54f810SSyed Saba Kareem writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
62ec54f810SSyed Saba Kareem pdm_ctrl = readl(acp_base + ACP_WOV_MISC_CTRL);
635579a966SMario Limonciello pdm_ctrl &= ~ACP_WOV_GAIN_CONTROL;
645579a966SMario Limonciello pdm_ctrl |= FIELD_PREP(ACP_WOV_GAIN_CONTROL, clamp(pdm_gain, 0, 3));
65ec54f810SSyed Saba Kareem writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
6651373056SSyed Saba Kareem }
6751373056SSyed Saba Kareem
acp63_enable_pdm_interrupts(struct pdm_dev_data * adata)6845aa83cbSVijendar Mukunda static void acp63_enable_pdm_interrupts(struct pdm_dev_data *adata)
6951373056SSyed Saba Kareem {
7051373056SSyed Saba Kareem u32 ext_int_ctrl;
7151373056SSyed Saba Kareem
7245aa83cbSVijendar Mukunda mutex_lock(adata->acp_lock);
73ec54f810SSyed Saba Kareem ext_int_ctrl = readl(adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
7451373056SSyed Saba Kareem ext_int_ctrl |= PDM_DMA_INTR_MASK;
75ec54f810SSyed Saba Kareem writel(ext_int_ctrl, adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
7645aa83cbSVijendar Mukunda mutex_unlock(adata->acp_lock);
7751373056SSyed Saba Kareem }
7851373056SSyed Saba Kareem
acp63_disable_pdm_interrupts(struct pdm_dev_data * adata)7945aa83cbSVijendar Mukunda static void acp63_disable_pdm_interrupts(struct pdm_dev_data *adata)
8051373056SSyed Saba Kareem {
8151373056SSyed Saba Kareem u32 ext_int_ctrl;
8251373056SSyed Saba Kareem
8345aa83cbSVijendar Mukunda mutex_lock(adata->acp_lock);
84ec54f810SSyed Saba Kareem ext_int_ctrl = readl(adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
8551373056SSyed Saba Kareem ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
86ec54f810SSyed Saba Kareem writel(ext_int_ctrl, adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
8745aa83cbSVijendar Mukunda mutex_unlock(adata->acp_lock);
8851373056SSyed Saba Kareem }
8951373056SSyed Saba Kareem
acp63_check_pdm_dma_status(void __iomem * acp_base)904b192114Ssyed saba kareem static bool acp63_check_pdm_dma_status(void __iomem *acp_base)
9151373056SSyed Saba Kareem {
9251373056SSyed Saba Kareem bool pdm_dma_status;
9351373056SSyed Saba Kareem u32 pdm_enable, pdm_dma_enable;
9451373056SSyed Saba Kareem
9551373056SSyed Saba Kareem pdm_dma_status = false;
96ec54f810SSyed Saba Kareem pdm_enable = readl(acp_base + ACP_WOV_PDM_ENABLE);
97ec54f810SSyed Saba Kareem pdm_dma_enable = readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
9851373056SSyed Saba Kareem if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable & ACP_PDM_DMA_EN_STATUS))
9951373056SSyed Saba Kareem pdm_dma_status = true;
10051373056SSyed Saba Kareem
10151373056SSyed Saba Kareem return pdm_dma_status;
10251373056SSyed Saba Kareem }
10351373056SSyed Saba Kareem
acp63_start_pdm_dma(void __iomem * acp_base)1044b192114Ssyed saba kareem static int acp63_start_pdm_dma(void __iomem *acp_base)
10551373056SSyed Saba Kareem {
10651373056SSyed Saba Kareem u32 pdm_enable;
10751373056SSyed Saba Kareem u32 pdm_dma_enable;
10851373056SSyed Saba Kareem int timeout;
10951373056SSyed Saba Kareem
11051373056SSyed Saba Kareem pdm_enable = 0x01;
11151373056SSyed Saba Kareem pdm_dma_enable = 0x01;
11251373056SSyed Saba Kareem
1134b192114Ssyed saba kareem acp63_enable_pdm_clock(acp_base);
114ec54f810SSyed Saba Kareem writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
115ec54f810SSyed Saba Kareem writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
11651373056SSyed Saba Kareem timeout = 0;
11751373056SSyed Saba Kareem while (++timeout < ACP_COUNTER) {
118ec54f810SSyed Saba Kareem pdm_dma_enable = readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
11951373056SSyed Saba Kareem if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS)
12051373056SSyed Saba Kareem return 0;
12151373056SSyed Saba Kareem udelay(DELAY_US);
12251373056SSyed Saba Kareem }
12351373056SSyed Saba Kareem return -ETIMEDOUT;
12451373056SSyed Saba Kareem }
12551373056SSyed Saba Kareem
acp63_stop_pdm_dma(void __iomem * acp_base)1264b192114Ssyed saba kareem static int acp63_stop_pdm_dma(void __iomem *acp_base)
12751373056SSyed Saba Kareem {
12851373056SSyed Saba Kareem u32 pdm_enable, pdm_dma_enable;
12951373056SSyed Saba Kareem int timeout;
13051373056SSyed Saba Kareem
13151373056SSyed Saba Kareem pdm_enable = 0x00;
13251373056SSyed Saba Kareem pdm_dma_enable = 0x00;
13351373056SSyed Saba Kareem
134ec54f810SSyed Saba Kareem pdm_enable = readl(acp_base + ACP_WOV_PDM_ENABLE);
135ec54f810SSyed Saba Kareem pdm_dma_enable = readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
13651373056SSyed Saba Kareem if (pdm_dma_enable & 0x01) {
13751373056SSyed Saba Kareem pdm_dma_enable = 0x02;
138ec54f810SSyed Saba Kareem writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
13951373056SSyed Saba Kareem timeout = 0;
14051373056SSyed Saba Kareem while (++timeout < ACP_COUNTER) {
141ec54f810SSyed Saba Kareem pdm_dma_enable = readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
14251373056SSyed Saba Kareem if ((pdm_dma_enable & 0x02) == 0x00)
14351373056SSyed Saba Kareem break;
14451373056SSyed Saba Kareem udelay(DELAY_US);
14551373056SSyed Saba Kareem }
14651373056SSyed Saba Kareem if (timeout == ACP_COUNTER)
14751373056SSyed Saba Kareem return -ETIMEDOUT;
14851373056SSyed Saba Kareem }
14951373056SSyed Saba Kareem if (pdm_enable == ACP_PDM_ENABLE) {
15051373056SSyed Saba Kareem pdm_enable = ACP_PDM_DISABLE;
151ec54f810SSyed Saba Kareem writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
15251373056SSyed Saba Kareem }
153ec54f810SSyed Saba Kareem writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH);
15451373056SSyed Saba Kareem return 0;
15551373056SSyed Saba Kareem }
15651373056SSyed Saba Kareem
acp63_config_dma(struct pdm_stream_instance * rtd,int direction)1574b192114Ssyed saba kareem static void acp63_config_dma(struct pdm_stream_instance *rtd, int direction)
15851373056SSyed Saba Kareem {
15951373056SSyed Saba Kareem u16 page_idx;
16051373056SSyed Saba Kareem u32 low, high, val;
16151373056SSyed Saba Kareem dma_addr_t addr;
16251373056SSyed Saba Kareem
16351373056SSyed Saba Kareem addr = rtd->dma_addr;
16451373056SSyed Saba Kareem val = PDM_PTE_OFFSET;
16551373056SSyed Saba Kareem
16651373056SSyed Saba Kareem /* Group Enable */
167ec54f810SSyed Saba Kareem writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp63_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
168ec54f810SSyed Saba Kareem writel(PAGE_SIZE_4K_ENABLE, rtd->acp63_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
16951373056SSyed Saba Kareem for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
17051373056SSyed Saba Kareem /* Load the low address of page int ACP SRAM through SRBM */
17151373056SSyed Saba Kareem low = lower_32_bits(addr);
17251373056SSyed Saba Kareem high = upper_32_bits(addr);
17351373056SSyed Saba Kareem
174ec54f810SSyed Saba Kareem writel(low, rtd->acp63_base + ACP_SCRATCH_REG_0 + val);
17551373056SSyed Saba Kareem high |= BIT(31);
176ec54f810SSyed Saba Kareem writel(high, rtd->acp63_base + ACP_SCRATCH_REG_0 + val + 4);
17751373056SSyed Saba Kareem val += 8;
17851373056SSyed Saba Kareem addr += PAGE_SIZE;
17951373056SSyed Saba Kareem }
18051373056SSyed Saba Kareem }
18151373056SSyed Saba Kareem
acp63_pdm_dma_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)1824b192114Ssyed saba kareem static int acp63_pdm_dma_open(struct snd_soc_component *component,
18351373056SSyed Saba Kareem struct snd_pcm_substream *substream)
18451373056SSyed Saba Kareem {
18551373056SSyed Saba Kareem struct snd_pcm_runtime *runtime;
18651373056SSyed Saba Kareem struct pdm_dev_data *adata;
18751373056SSyed Saba Kareem struct pdm_stream_instance *pdm_data;
18851373056SSyed Saba Kareem int ret;
18951373056SSyed Saba Kareem
19051373056SSyed Saba Kareem runtime = substream->runtime;
19151373056SSyed Saba Kareem adata = dev_get_drvdata(component->dev);
19251373056SSyed Saba Kareem pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL);
19351373056SSyed Saba Kareem if (!pdm_data)
19451373056SSyed Saba Kareem return -EINVAL;
19551373056SSyed Saba Kareem
19651373056SSyed Saba Kareem if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1974b192114Ssyed saba kareem runtime->hw = acp63_pdm_hardware_capture;
19851373056SSyed Saba Kareem
19951373056SSyed Saba Kareem ret = snd_pcm_hw_constraint_integer(runtime,
20051373056SSyed Saba Kareem SNDRV_PCM_HW_PARAM_PERIODS);
20151373056SSyed Saba Kareem if (ret < 0) {
20251373056SSyed Saba Kareem dev_err(component->dev, "set integer constraint failed\n");
20351373056SSyed Saba Kareem kfree(pdm_data);
20451373056SSyed Saba Kareem return ret;
20551373056SSyed Saba Kareem }
20651373056SSyed Saba Kareem
20745aa83cbSVijendar Mukunda acp63_enable_pdm_interrupts(adata);
20851373056SSyed Saba Kareem
20951373056SSyed Saba Kareem if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
21051373056SSyed Saba Kareem adata->capture_stream = substream;
21151373056SSyed Saba Kareem
2124b192114Ssyed saba kareem pdm_data->acp63_base = adata->acp63_base;
21351373056SSyed Saba Kareem runtime->private_data = pdm_data;
21451373056SSyed Saba Kareem return ret;
21551373056SSyed Saba Kareem }
21651373056SSyed Saba Kareem
acp63_pdm_dma_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)2174b192114Ssyed saba kareem static int acp63_pdm_dma_hw_params(struct snd_soc_component *component,
21851373056SSyed Saba Kareem struct snd_pcm_substream *substream,
21951373056SSyed Saba Kareem struct snd_pcm_hw_params *params)
22051373056SSyed Saba Kareem {
22151373056SSyed Saba Kareem struct pdm_stream_instance *rtd;
22251373056SSyed Saba Kareem size_t size, period_bytes;
22351373056SSyed Saba Kareem
22451373056SSyed Saba Kareem rtd = substream->runtime->private_data;
22551373056SSyed Saba Kareem if (!rtd)
22651373056SSyed Saba Kareem return -EINVAL;
22751373056SSyed Saba Kareem size = params_buffer_bytes(params);
22851373056SSyed Saba Kareem period_bytes = params_period_bytes(params);
22951373056SSyed Saba Kareem rtd->dma_addr = substream->runtime->dma_addr;
23051373056SSyed Saba Kareem rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
2314b192114Ssyed saba kareem acp63_config_dma(rtd, substream->stream);
2324b192114Ssyed saba kareem acp63_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, size,
2334b192114Ssyed saba kareem period_bytes, rtd->acp63_base);
23451373056SSyed Saba Kareem return 0;
23551373056SSyed Saba Kareem }
23651373056SSyed Saba Kareem
acp63_pdm_get_byte_count(struct pdm_stream_instance * rtd,int direction)2374b192114Ssyed saba kareem static u64 acp63_pdm_get_byte_count(struct pdm_stream_instance *rtd,
23851373056SSyed Saba Kareem int direction)
23951373056SSyed Saba Kareem {
24051373056SSyed Saba Kareem u32 high, low;
24151373056SSyed Saba Kareem u64 byte_count;
24251373056SSyed Saba Kareem
243ec54f810SSyed Saba Kareem high = readl(rtd->acp63_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
24451373056SSyed Saba Kareem byte_count = high;
245ec54f810SSyed Saba Kareem low = readl(rtd->acp63_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
24651373056SSyed Saba Kareem byte_count = (byte_count << 32) | low;
24751373056SSyed Saba Kareem return byte_count;
24851373056SSyed Saba Kareem }
24951373056SSyed Saba Kareem
acp63_pdm_dma_pointer(struct snd_soc_component * comp,struct snd_pcm_substream * stream)2504b192114Ssyed saba kareem static snd_pcm_uframes_t acp63_pdm_dma_pointer(struct snd_soc_component *comp,
25151373056SSyed Saba Kareem struct snd_pcm_substream *stream)
25251373056SSyed Saba Kareem {
25351373056SSyed Saba Kareem struct pdm_stream_instance *rtd;
25451373056SSyed Saba Kareem u32 pos, buffersize;
25551373056SSyed Saba Kareem u64 bytescount;
25651373056SSyed Saba Kareem
25751373056SSyed Saba Kareem rtd = stream->runtime->private_data;
25851373056SSyed Saba Kareem buffersize = frames_to_bytes(stream->runtime,
25951373056SSyed Saba Kareem stream->runtime->buffer_size);
2604b192114Ssyed saba kareem bytescount = acp63_pdm_get_byte_count(rtd, stream->stream);
26151373056SSyed Saba Kareem if (bytescount > rtd->bytescount)
26251373056SSyed Saba Kareem bytescount -= rtd->bytescount;
26351373056SSyed Saba Kareem pos = do_div(bytescount, buffersize);
26451373056SSyed Saba Kareem return bytes_to_frames(stream->runtime, pos);
26551373056SSyed Saba Kareem }
26651373056SSyed Saba Kareem
acp63_pdm_dma_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)2674b192114Ssyed saba kareem static int acp63_pdm_dma_new(struct snd_soc_component *component,
26851373056SSyed Saba Kareem struct snd_soc_pcm_runtime *rtd)
26951373056SSyed Saba Kareem {
27051373056SSyed Saba Kareem struct device *parent = component->dev->parent;
27151373056SSyed Saba Kareem
27251373056SSyed Saba Kareem snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
27351373056SSyed Saba Kareem parent, MIN_BUFFER, MAX_BUFFER);
27451373056SSyed Saba Kareem return 0;
27551373056SSyed Saba Kareem }
27651373056SSyed Saba Kareem
acp63_pdm_dma_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)2774b192114Ssyed saba kareem static int acp63_pdm_dma_close(struct snd_soc_component *component,
27851373056SSyed Saba Kareem struct snd_pcm_substream *substream)
27951373056SSyed Saba Kareem {
28051373056SSyed Saba Kareem struct pdm_dev_data *adata = dev_get_drvdata(component->dev);
28151373056SSyed Saba Kareem struct snd_pcm_runtime *runtime = substream->runtime;
28251373056SSyed Saba Kareem
28345aa83cbSVijendar Mukunda acp63_disable_pdm_interrupts(adata);
28451373056SSyed Saba Kareem adata->capture_stream = NULL;
28551373056SSyed Saba Kareem kfree(runtime->private_data);
28651373056SSyed Saba Kareem return 0;
28751373056SSyed Saba Kareem }
28851373056SSyed Saba Kareem
acp63_pdm_dai_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)2894b192114Ssyed saba kareem static int acp63_pdm_dai_trigger(struct snd_pcm_substream *substream,
29051373056SSyed Saba Kareem int cmd, struct snd_soc_dai *dai)
29151373056SSyed Saba Kareem {
29251373056SSyed Saba Kareem struct pdm_stream_instance *rtd;
29351373056SSyed Saba Kareem int ret;
29451373056SSyed Saba Kareem bool pdm_status;
29551373056SSyed Saba Kareem unsigned int ch_mask;
29651373056SSyed Saba Kareem
29751373056SSyed Saba Kareem rtd = substream->runtime->private_data;
29851373056SSyed Saba Kareem ret = 0;
29951373056SSyed Saba Kareem switch (substream->runtime->channels) {
30051373056SSyed Saba Kareem case TWO_CH:
30151373056SSyed Saba Kareem ch_mask = 0x00;
30251373056SSyed Saba Kareem break;
30351373056SSyed Saba Kareem default:
30451373056SSyed Saba Kareem return -EINVAL;
30551373056SSyed Saba Kareem }
30651373056SSyed Saba Kareem switch (cmd) {
30751373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_START:
30851373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_RESUME:
30951373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
310ec54f810SSyed Saba Kareem writel(ch_mask, rtd->acp63_base + ACP_WOV_PDM_NO_OF_CHANNELS);
311ec54f810SSyed Saba Kareem writel(PDM_DECIMATION_FACTOR, rtd->acp63_base + ACP_WOV_PDM_DECIMATION_FACTOR);
3124b192114Ssyed saba kareem rtd->bytescount = acp63_pdm_get_byte_count(rtd, substream->stream);
3134b192114Ssyed saba kareem pdm_status = acp63_check_pdm_dma_status(rtd->acp63_base);
31451373056SSyed Saba Kareem if (!pdm_status)
3154b192114Ssyed saba kareem ret = acp63_start_pdm_dma(rtd->acp63_base);
31651373056SSyed Saba Kareem break;
31751373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_STOP:
31851373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_SUSPEND:
31951373056SSyed Saba Kareem case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
3204b192114Ssyed saba kareem pdm_status = acp63_check_pdm_dma_status(rtd->acp63_base);
32151373056SSyed Saba Kareem if (pdm_status)
3224b192114Ssyed saba kareem ret = acp63_stop_pdm_dma(rtd->acp63_base);
32351373056SSyed Saba Kareem break;
32451373056SSyed Saba Kareem default:
32551373056SSyed Saba Kareem ret = -EINVAL;
32651373056SSyed Saba Kareem break;
32751373056SSyed Saba Kareem }
32851373056SSyed Saba Kareem return ret;
32951373056SSyed Saba Kareem }
33051373056SSyed Saba Kareem
3314b192114Ssyed saba kareem static const struct snd_soc_dai_ops acp63_pdm_dai_ops = {
3324b192114Ssyed saba kareem .trigger = acp63_pdm_dai_trigger,
33351373056SSyed Saba Kareem };
33451373056SSyed Saba Kareem
3354b192114Ssyed saba kareem static struct snd_soc_dai_driver acp63_pdm_dai_driver = {
33633cea6bbSSyed Saba Kareem .name = "acp_ps_pdm_dma.0",
33733cea6bbSSyed Saba Kareem .capture = {
33833cea6bbSSyed Saba Kareem .rates = SNDRV_PCM_RATE_48000,
33933cea6bbSSyed Saba Kareem .formats = SNDRV_PCM_FMTBIT_S32_LE,
34033cea6bbSSyed Saba Kareem .channels_min = 2,
34133cea6bbSSyed Saba Kareem .channels_max = 2,
34233cea6bbSSyed Saba Kareem .rate_min = 48000,
34333cea6bbSSyed Saba Kareem .rate_max = 48000,
34433cea6bbSSyed Saba Kareem },
3454b192114Ssyed saba kareem .ops = &acp63_pdm_dai_ops,
34633cea6bbSSyed Saba Kareem };
34733cea6bbSSyed Saba Kareem
3484b192114Ssyed saba kareem static const struct snd_soc_component_driver acp63_pdm_component = {
34933cea6bbSSyed Saba Kareem .name = DRV_NAME,
3504b192114Ssyed saba kareem .open = acp63_pdm_dma_open,
3514b192114Ssyed saba kareem .close = acp63_pdm_dma_close,
3524b192114Ssyed saba kareem .hw_params = acp63_pdm_dma_hw_params,
3534b192114Ssyed saba kareem .pointer = acp63_pdm_dma_pointer,
3544b192114Ssyed saba kareem .pcm_construct = acp63_pdm_dma_new,
35533cea6bbSSyed Saba Kareem };
35633cea6bbSSyed Saba Kareem
acp63_pdm_audio_probe(struct platform_device * pdev)3574b192114Ssyed saba kareem static int acp63_pdm_audio_probe(struct platform_device *pdev)
35833cea6bbSSyed Saba Kareem {
35933cea6bbSSyed Saba Kareem struct resource *res;
36033cea6bbSSyed Saba Kareem struct pdm_dev_data *adata;
361b6b5c642SVijendar Mukunda struct acp63_dev_data *acp_data;
362b6b5c642SVijendar Mukunda struct device *parent;
36333cea6bbSSyed Saba Kareem int status;
36433cea6bbSSyed Saba Kareem
365b6b5c642SVijendar Mukunda parent = pdev->dev.parent;
366b6b5c642SVijendar Mukunda acp_data = dev_get_drvdata(parent);
36733cea6bbSSyed Saba Kareem res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
36833cea6bbSSyed Saba Kareem if (!res) {
36933cea6bbSSyed Saba Kareem dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
37033cea6bbSSyed Saba Kareem return -ENODEV;
37133cea6bbSSyed Saba Kareem }
37233cea6bbSSyed Saba Kareem
37333cea6bbSSyed Saba Kareem adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
37433cea6bbSSyed Saba Kareem if (!adata)
37533cea6bbSSyed Saba Kareem return -ENOMEM;
37633cea6bbSSyed Saba Kareem
3774b192114Ssyed saba kareem adata->acp63_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
3784b192114Ssyed saba kareem if (!adata->acp63_base)
37933cea6bbSSyed Saba Kareem return -ENOMEM;
38033cea6bbSSyed Saba Kareem
38133cea6bbSSyed Saba Kareem adata->capture_stream = NULL;
382b6b5c642SVijendar Mukunda adata->acp_lock = &acp_data->acp_lock;
38333cea6bbSSyed Saba Kareem dev_set_drvdata(&pdev->dev, adata);
38433cea6bbSSyed Saba Kareem status = devm_snd_soc_register_component(&pdev->dev,
3854b192114Ssyed saba kareem &acp63_pdm_component,
3864b192114Ssyed saba kareem &acp63_pdm_dai_driver, 1);
38733cea6bbSSyed Saba Kareem if (status) {
38833cea6bbSSyed Saba Kareem dev_err(&pdev->dev, "Fail to register acp pdm dai\n");
38933cea6bbSSyed Saba Kareem
39033cea6bbSSyed Saba Kareem return -ENODEV;
39133cea6bbSSyed Saba Kareem }
39228023a78SSyed Saba Kareem pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
39328023a78SSyed Saba Kareem pm_runtime_use_autosuspend(&pdev->dev);
394*15475631SArun Gopal Kondaveeti pm_runtime_mark_last_busy(&pdev->dev);
395*15475631SArun Gopal Kondaveeti pm_runtime_set_active(&pdev->dev);
39628023a78SSyed Saba Kareem pm_runtime_enable(&pdev->dev);
39733cea6bbSSyed Saba Kareem return 0;
39833cea6bbSSyed Saba Kareem }
39933cea6bbSSyed Saba Kareem
acp63_pdm_audio_remove(struct platform_device * pdev)4005b6bacfaSUwe Kleine-König static void acp63_pdm_audio_remove(struct platform_device *pdev)
40128023a78SSyed Saba Kareem {
40228023a78SSyed Saba Kareem pm_runtime_disable(&pdev->dev);
40328023a78SSyed Saba Kareem }
40428023a78SSyed Saba Kareem
acp63_pdm_resume(struct device * dev)4054b192114Ssyed saba kareem static int __maybe_unused acp63_pdm_resume(struct device *dev)
40628023a78SSyed Saba Kareem {
40728023a78SSyed Saba Kareem struct pdm_dev_data *adata;
40828023a78SSyed Saba Kareem struct snd_pcm_runtime *runtime;
40928023a78SSyed Saba Kareem struct pdm_stream_instance *rtd;
41028023a78SSyed Saba Kareem u32 period_bytes, buffer_len;
41128023a78SSyed Saba Kareem
41228023a78SSyed Saba Kareem adata = dev_get_drvdata(dev);
41328023a78SSyed Saba Kareem if (adata->capture_stream && adata->capture_stream->runtime) {
41428023a78SSyed Saba Kareem runtime = adata->capture_stream->runtime;
41528023a78SSyed Saba Kareem rtd = runtime->private_data;
41628023a78SSyed Saba Kareem period_bytes = frames_to_bytes(runtime, runtime->period_size);
41728023a78SSyed Saba Kareem buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
4184b192114Ssyed saba kareem acp63_config_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
4194b192114Ssyed saba kareem acp63_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
4204b192114Ssyed saba kareem period_bytes, adata->acp63_base);
42128023a78SSyed Saba Kareem }
42245aa83cbSVijendar Mukunda acp63_enable_pdm_interrupts(adata);
42328023a78SSyed Saba Kareem return 0;
42428023a78SSyed Saba Kareem }
42528023a78SSyed Saba Kareem
acp63_pdm_suspend(struct device * dev)4264b192114Ssyed saba kareem static int __maybe_unused acp63_pdm_suspend(struct device *dev)
42728023a78SSyed Saba Kareem {
42828023a78SSyed Saba Kareem struct pdm_dev_data *adata;
42928023a78SSyed Saba Kareem
43028023a78SSyed Saba Kareem adata = dev_get_drvdata(dev);
43145aa83cbSVijendar Mukunda acp63_disable_pdm_interrupts(adata);
43228023a78SSyed Saba Kareem return 0;
43328023a78SSyed Saba Kareem }
43428023a78SSyed Saba Kareem
acp63_pdm_runtime_resume(struct device * dev)4354b192114Ssyed saba kareem static int __maybe_unused acp63_pdm_runtime_resume(struct device *dev)
43628023a78SSyed Saba Kareem {
43728023a78SSyed Saba Kareem struct pdm_dev_data *adata;
43828023a78SSyed Saba Kareem
43928023a78SSyed Saba Kareem adata = dev_get_drvdata(dev);
44045aa83cbSVijendar Mukunda acp63_enable_pdm_interrupts(adata);
44128023a78SSyed Saba Kareem return 0;
44228023a78SSyed Saba Kareem }
44328023a78SSyed Saba Kareem
4444b192114Ssyed saba kareem static const struct dev_pm_ops acp63_pdm_pm_ops = {
4454b192114Ssyed saba kareem SET_RUNTIME_PM_OPS(acp63_pdm_suspend, acp63_pdm_runtime_resume, NULL)
4464b192114Ssyed saba kareem SET_SYSTEM_SLEEP_PM_OPS(acp63_pdm_suspend, acp63_pdm_resume)
44728023a78SSyed Saba Kareem };
44828023a78SSyed Saba Kareem
4494b192114Ssyed saba kareem static struct platform_driver acp63_pdm_dma_driver = {
4504b192114Ssyed saba kareem .probe = acp63_pdm_audio_probe,
4515b6bacfaSUwe Kleine-König .remove_new = acp63_pdm_audio_remove,
45233cea6bbSSyed Saba Kareem .driver = {
45333cea6bbSSyed Saba Kareem .name = "acp_ps_pdm_dma",
4544b192114Ssyed saba kareem .pm = &acp63_pdm_pm_ops,
45533cea6bbSSyed Saba Kareem },
45633cea6bbSSyed Saba Kareem };
45733cea6bbSSyed Saba Kareem
4584b192114Ssyed saba kareem module_platform_driver(acp63_pdm_dma_driver);
45933cea6bbSSyed Saba Kareem
46033cea6bbSSyed Saba Kareem MODULE_AUTHOR("Syed.SabaKareem@amd.com");
46133cea6bbSSyed Saba Kareem MODULE_DESCRIPTION("AMD PINK SARDINE PDM Driver");
46233cea6bbSSyed Saba Kareem MODULE_LICENSE("GPL v2");
46333cea6bbSSyed Saba Kareem MODULE_ALIAS("platform:" DRV_NAME);
464