@@ -17,8 +17,42 @@
#define DRV_NAME "acp5x_i2s_dma"
-static const struct snd_soc_component_driver acp5x_i2s_component = {
- .name = DRV_NAME,
+static const struct snd_pcm_hardware acp5x_pcm_hardware_playback = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
+ .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
+ .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
+ .periods_min = PLAYBACK_MIN_NUM_PERIODS,
+ .periods_max = PLAYBACK_MAX_NUM_PERIODS,
+};
+
+static const struct snd_pcm_hardware acp5x_pcm_hardware_capture = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+ .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+ .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
+ .periods_min = CAPTURE_MIN_NUM_PERIODS,
+ .periods_max = CAPTURE_MAX_NUM_PERIODS,
};
static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
@@ -65,6 +99,274 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
return IRQ_NONE;
}
+static void config_acp5x_dma(struct i2s_stream_instance *rtd, int direction)
+{
+ u16 page_idx;
+ u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
+ u32 reg_dma_size, reg_fifo_size;
+ dma_addr_t addr;
+
+ addr = rtd->dma_addr;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ val = ACP_SRAM_HS_PB_PTE_OFFSET;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ val = ACP_SRAM_SP_PB_PTE_OFFSET;
+ }
+ } else {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ val = ACP_SRAM_HS_CP_PTE_OFFSET;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ val = ACP_SRAM_SP_CP_PTE_OFFSET;
+ }
+ }
+ /* Group Enable */
+ acp_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp5x_base +
+ ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
+ acp_writel(PAGE_SIZE_4K_ENABLE, rtd->acp5x_base +
+ ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
+
+ for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
+ /* Load the low address of page int ACP SRAM through SRBM */
+ low = lower_32_bits(addr);
+ high = upper_32_bits(addr);
+
+ acp_writel(low, rtd->acp5x_base + ACP_SCRATCH_REG_0 + val);
+ high |= BIT(31);
+ acp_writel(high, rtd->acp5x_base + ACP_SCRATCH_REG_0 + val + 4);
+ /* Move to next physically contiguous page */
+ val += 8;
+ addr += PAGE_SIZE;
+ }
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ reg_dma_size = ACP_HS_TX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ HS_PB_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = ACP_HS_TX_FIFOADDR;
+ reg_fifo_size = ACP_HS_TX_FIFOSIZE;
+ acp_writel(I2S_HS_TX_MEM_WINDOW_START,
+ rtd->acp5x_base + ACP_HS_TX_RINGBUFADDR);
+ break;
+
+ case I2S_SP_INSTANCE:
+ default:
+ reg_dma_size = ACP_I2S_TX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ SP_PB_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = ACP_I2S_TX_FIFOADDR;
+ reg_fifo_size = ACP_I2S_TX_FIFOSIZE;
+ acp_writel(I2S_SP_TX_MEM_WINDOW_START,
+ rtd->acp5x_base + ACP_I2S_TX_RINGBUFADDR);
+ }
+ } else {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ reg_dma_size = ACP_HS_RX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ HS_CAPT_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = ACP_HS_RX_FIFOADDR;
+ reg_fifo_size = ACP_HS_RX_FIFOSIZE;
+ acp_writel(I2S_HS_RX_MEM_WINDOW_START,
+ rtd->acp5x_base + ACP_HS_RX_RINGBUFADDR);
+ break;
+
+ case I2S_SP_INSTANCE:
+ default:
+ reg_dma_size = ACP_I2S_RX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ SP_CAPT_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = ACP_I2S_RX_FIFOADDR;
+ reg_fifo_size = ACP_I2S_RX_FIFOSIZE;
+ acp_writel(I2S_SP_RX_MEM_WINDOW_START,
+ rtd->acp5x_base + ACP_I2S_RX_RINGBUFADDR);
+ }
+ }
+ acp_writel(DMA_SIZE, rtd->acp5x_base + reg_dma_size);
+ acp_writel(acp_fifo_addr, rtd->acp5x_base + reg_fifo_addr);
+ acp_writel(FIFO_SIZE, rtd->acp5x_base + reg_fifo_size);
+ acp_writel(BIT(I2S_RX_THRESHOLD) | BIT(HS_RX_THRESHOLD)
+ | BIT(I2S_TX_THRESHOLD) | BIT(HS_TX_THRESHOLD),
+ rtd->acp5x_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static int acp5x_dma_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct snd_soc_pcm_runtime *prtd;
+ struct i2s_dev_data *adata;
+ struct i2s_stream_instance *i2s_data;
+ int ret;
+
+ runtime = substream->runtime;
+ prtd = asoc_substream_to_rtd(substream);
+ component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
+ adata = dev_get_drvdata(component->dev);
+
+ i2s_data = kzalloc(sizeof(*i2s_data), GFP_KERNEL);
+ if (!i2s_data)
+ return -ENOMEM;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ runtime->hw = acp5x_pcm_hardware_playback;
+ else
+ runtime->hw = acp5x_pcm_hardware_capture;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(component->dev, "set integer constraint failed\n");
+ kfree(i2s_data);
+ return ret;
+ }
+ i2s_data->acp5x_base = adata->acp5x_base;
+ runtime->private_data = i2s_data;
+ return ret;
+}
+
+static int acp5x_dma_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct i2s_stream_instance *rtd;
+ struct snd_soc_pcm_runtime *prtd;
+ struct snd_soc_card *card;
+ struct acp5x_platform_info *pinfo;
+ struct i2s_dev_data *adata;
+ u64 size;
+
+ prtd = asoc_substream_to_rtd(substream);
+ card = prtd->card;
+ pinfo = snd_soc_card_get_drvdata(card);
+ adata = dev_get_drvdata(component->dev);
+ rtd = substream->runtime->private_data;
+
+ if (!rtd)
+ return -EINVAL;
+
+ if (pinfo) {
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ rtd->i2s_instance = pinfo->play_i2s_instance;
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ adata->play_stream = substream;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_play_stream = substream;
+ }
+ } else {
+ rtd->i2s_instance = pinfo->cap_i2s_instance;
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ adata->capture_stream = substream;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_capture_stream = substream;
+ }
+ }
+ } else {
+ dev_err(component->dev, "pinfo failed\n");
+ return -EINVAL;
+ }
+ size = params_buffer_bytes(params);
+ rtd->dma_addr = substream->dma_buffer.addr;
+ rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
+ config_acp5x_dma(rtd, substream->stream);
+ return 0;
+}
+
+static snd_pcm_uframes_t acp5x_dma_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct i2s_stream_instance *rtd;
+ u32 pos;
+ u32 buffersize;
+ u64 bytescount;
+
+ rtd = substream->runtime->private_data;
+ buffersize = frames_to_bytes(substream->runtime,
+ substream->runtime->buffer_size);
+ bytescount = acp_get_byte_count(rtd, substream->stream);
+ if (bytescount > rtd->bytescount)
+ bytescount -= rtd->bytescount;
+ pos = do_div(bytescount, buffersize);
+ return bytes_to_frames(substream->runtime, pos);
+}
+
+static int acp5x_dma_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ struct device *parent = component->dev->parent;
+
+ snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
+ parent, MIN_BUFFER, MAX_BUFFER);
+ return 0;
+}
+
+static int acp5x_dma_mmap(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ return snd_pcm_lib_default_mmap(substream, vma);
+}
+
+static int acp5x_dma_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *prtd;
+ struct i2s_dev_data *adata;
+ struct i2s_stream_instance *ins;
+
+ prtd = asoc_substream_to_rtd(substream);
+ component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
+ adata = dev_get_drvdata(component->dev);
+ ins = substream->runtime->private_data;
+ if (!ins)
+ return -EINVAL;
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (ins->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ adata->play_stream = NULL;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_play_stream = NULL;
+ }
+ } else {
+ switch (ins->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ adata->capture_stream = NULL;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_capture_stream = NULL;
+ }
+ }
+ kfree(ins);
+ return 0;
+}
+
+static const struct snd_soc_component_driver acp5x_i2s_component = {
+ .name = DRV_NAME,
+ .open = acp5x_dma_open,
+ .close = acp5x_dma_close,
+ .hw_params = acp5x_dma_hw_params,
+ .pointer = acp5x_dma_pointer,
+ .mmap = acp5x_dma_mmap,
+ .pcm_construct = acp5x_dma_new,
+};
+
static int acp5x_audio_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -6,6 +6,7 @@
*/
#include "vg_chip_offset_byte.h"
+#include <sound/pcm.h>
#define ACP5x_PHY_BASE_ADDRESS 0x1240000
#define ACP_DEVICE_ID 0x15E2
@@ -37,6 +38,39 @@
#define HS_TX_THRESHOLD 24
#define HS_RX_THRESHOLD 23
+#define I2S_SP_INSTANCE 1
+#define I2S_HS_INSTANCE 2
+
+#define ACP_SRAM_PTE_OFFSET 0x02050000
+#define ACP_SRAM_SP_PB_PTE_OFFSET 0x0
+#define ACP_SRAM_SP_CP_PTE_OFFSET 0x100
+#define ACP_SRAM_HS_PB_PTE_OFFSET 0x200
+#define ACP_SRAM_HS_CP_PTE_OFFSET 0x300
+#define PAGE_SIZE_4K_ENABLE 0x2
+#define I2S_SP_TX_MEM_WINDOW_START 0x4000000
+#define I2S_SP_RX_MEM_WINDOW_START 0x4020000
+#define I2S_HS_TX_MEM_WINDOW_START 0x4040000
+#define I2S_HS_RX_MEM_WINDOW_START 0x4060000
+
+#define SP_PB_FIFO_ADDR_OFFSET 0x500
+#define SP_CAPT_FIFO_ADDR_OFFSET 0x700
+#define HS_PB_FIFO_ADDR_OFFSET 0x900
+#define HS_CAPT_FIFO_ADDR_OFFSET 0xB00
+#define PLAYBACK_MIN_NUM_PERIODS 2
+#define PLAYBACK_MAX_NUM_PERIODS 8
+#define PLAYBACK_MAX_PERIOD_SIZE 8192
+#define PLAYBACK_MIN_PERIOD_SIZE 1024
+#define CAPTURE_MIN_NUM_PERIODS 2
+#define CAPTURE_MAX_NUM_PERIODS 8
+#define CAPTURE_MAX_PERIOD_SIZE 8192
+#define CAPTURE_MIN_PERIOD_SIZE 1024
+
+#define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
+#define MIN_BUFFER MAX_BUFFER
+#define FIFO_SIZE 0x100
+#define DMA_SIZE 0x40
+#define FRM_LEN 0x100
+
struct i2s_dev_data {
unsigned int i2s_irq;
void __iomem *acp5x_base;
@@ -46,6 +80,31 @@ struct i2s_dev_data {
struct snd_pcm_substream *i2ssp_capture_stream;
};
+struct i2s_stream_instance {
+ u16 num_pages;
+ u16 i2s_instance;
+ u16 direction;
+ u16 channels;
+ u32 xfer_resolution;
+ u32 val;
+ dma_addr_t dma_addr;
+ u64 bytescount;
+ void __iomem *acp5x_base;
+};
+
+union acp_dma_count {
+ struct {
+ u32 low;
+ u32 high;
+ } bcount;
+ u64 bytescount;
+};
+
+struct acp5x_platform_info {
+ u16 play_i2s_instance;
+ u16 cap_i2s_instance;
+};
+
/* common header file uses exact offset rather than relative
* offset which requires subtraction logic from base_addr
* for accessing ACP5x MMIO space registers
@@ -59,3 +118,50 @@ static inline void acp_writel(u32 val, void __iomem *base_addr)
{
writel(val, base_addr - ACP5x_PHY_BASE_ADDRESS);
}
+
+static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd,
+ int direction)
+{
+ union acp_dma_count byte_count;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ byte_count.bcount.high =
+ acp_readl(rtd->acp5x_base +
+ ACP_HS_TX_LINEARPOSCNTR_HIGH);
+ byte_count.bcount.low =
+ acp_readl(rtd->acp5x_base +
+ ACP_HS_TX_LINEARPOSCNTR_LOW);
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ byte_count.bcount.high =
+ acp_readl(rtd->acp5x_base +
+ ACP_I2S_TX_LINEARPOSCNTR_HIGH);
+ byte_count.bcount.low =
+ acp_readl(rtd->acp5x_base +
+ ACP_I2S_TX_LINEARPOSCNTR_LOW);
+ }
+ } else {
+ switch (rtd->i2s_instance) {
+ case I2S_HS_INSTANCE:
+ byte_count.bcount.high =
+ acp_readl(rtd->acp5x_base +
+ ACP_HS_RX_LINEARPOSCNTR_HIGH);
+ byte_count.bcount.low =
+ acp_readl(rtd->acp5x_base +
+ ACP_HS_RX_LINEARPOSCNTR_LOW);
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ byte_count.bcount.high =
+ acp_readl(rtd->acp5x_base +
+ ACP_I2S_RX_LINEARPOSCNTR_HIGH);
+ byte_count.bcount.low =
+ acp_readl(rtd->acp5x_base +
+ ACP_I2S_RX_LINEARPOSCNTR_LOW);
+ }
+ }
+ return byte_count.bytescount;
+}