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Diffstat (limited to 'sound/soc/amd/raven/acp3x-pcm-dma.c')
-rw-r--r--sound/soc/amd/raven/acp3x-pcm-dma.c539
1 files changed, 539 insertions, 0 deletions
diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
new file mode 100644
index 000000000..01b283483
--- /dev/null
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -0,0 +1,539 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD ALSA SoC PCM Driver
+//
+//Copyright 2016 Advanced Micro Devices, Inc.
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "acp3x.h"
+
+#define DRV_NAME "acp3x_rv_i2s_dma"
+
+static const struct snd_pcm_hardware acp3x_pcm_hardware_playback = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_BATCH |
+ 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_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 8,
+ .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 acp3x_pcm_hardware_capture = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_BATCH |
+ 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_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .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)
+{
+ struct i2s_dev_data *rv_i2s_data;
+ u16 play_flag, cap_flag;
+ u32 val;
+
+ rv_i2s_data = dev_id;
+ if (!rv_i2s_data)
+ return IRQ_NONE;
+
+ play_flag = 0;
+ cap_flag = 0;
+ val = rv_readl(rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
+ if ((val & BIT(BT_TX_THRESHOLD)) && rv_i2s_data->play_stream) {
+ rv_writel(BIT(BT_TX_THRESHOLD), rv_i2s_data->acp3x_base +
+ mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->play_stream);
+ play_flag = 1;
+ }
+ if ((val & BIT(I2S_TX_THRESHOLD)) &&
+ rv_i2s_data->i2ssp_play_stream) {
+ rv_writel(BIT(I2S_TX_THRESHOLD),
+ rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->i2ssp_play_stream);
+ play_flag = 1;
+ }
+
+ if ((val & BIT(BT_RX_THRESHOLD)) && rv_i2s_data->capture_stream) {
+ rv_writel(BIT(BT_RX_THRESHOLD), rv_i2s_data->acp3x_base +
+ mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->capture_stream);
+ cap_flag = 1;
+ }
+ if ((val & BIT(I2S_RX_THRESHOLD)) &&
+ rv_i2s_data->i2ssp_capture_stream) {
+ rv_writel(BIT(I2S_RX_THRESHOLD),
+ rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
+ snd_pcm_period_elapsed(rv_i2s_data->i2ssp_capture_stream);
+ cap_flag = 1;
+ }
+
+ if (play_flag | cap_flag)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
+static void config_acp3x_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_BT_INSTANCE:
+ val = ACP_SRAM_BT_PB_PTE_OFFSET;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ val = ACP_SRAM_SP_PB_PTE_OFFSET;
+ }
+ } else {
+ switch (rtd->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ val = ACP_SRAM_BT_CP_PTE_OFFSET;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ val = ACP_SRAM_SP_CP_PTE_OFFSET;
+ }
+ }
+ /* Group Enable */
+ rv_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp3x_base +
+ mmACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
+ rv_writel(PAGE_SIZE_4K_ENABLE, rtd->acp3x_base +
+ mmACPAXI2AXI_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);
+
+ rv_writel(low, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val);
+ high |= BIT(31);
+ rv_writel(high, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val
+ + 4);
+ /* Move to next physically contiguos page */
+ val += 8;
+ addr += PAGE_SIZE;
+ }
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ switch (rtd->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ reg_dma_size = mmACP_BT_TX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ BT_PB_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = mmACP_BT_TX_FIFOADDR;
+ reg_fifo_size = mmACP_BT_TX_FIFOSIZE;
+ rv_writel(I2S_BT_TX_MEM_WINDOW_START,
+ rtd->acp3x_base + mmACP_BT_TX_RINGBUFADDR);
+ break;
+
+ case I2S_SP_INSTANCE:
+ default:
+ reg_dma_size = mmACP_I2S_TX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ SP_PB_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = mmACP_I2S_TX_FIFOADDR;
+ reg_fifo_size = mmACP_I2S_TX_FIFOSIZE;
+ rv_writel(I2S_SP_TX_MEM_WINDOW_START,
+ rtd->acp3x_base + mmACP_I2S_TX_RINGBUFADDR);
+ }
+ } else {
+ switch (rtd->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ reg_dma_size = mmACP_BT_RX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ BT_CAPT_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = mmACP_BT_RX_FIFOADDR;
+ reg_fifo_size = mmACP_BT_RX_FIFOSIZE;
+ rv_writel(I2S_BT_RX_MEM_WINDOW_START,
+ rtd->acp3x_base + mmACP_BT_RX_RINGBUFADDR);
+ break;
+
+ case I2S_SP_INSTANCE:
+ default:
+ reg_dma_size = mmACP_I2S_RX_DMA_SIZE;
+ acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
+ SP_CAPT_FIFO_ADDR_OFFSET;
+ reg_fifo_addr = mmACP_I2S_RX_FIFOADDR;
+ reg_fifo_size = mmACP_I2S_RX_FIFOSIZE;
+ rv_writel(I2S_SP_RX_MEM_WINDOW_START,
+ rtd->acp3x_base + mmACP_I2S_RX_RINGBUFADDR);
+ }
+ }
+ rv_writel(DMA_SIZE, rtd->acp3x_base + reg_dma_size);
+ rv_writel(acp_fifo_addr, rtd->acp3x_base + reg_fifo_addr);
+ rv_writel(FIFO_SIZE, rtd->acp3x_base + reg_fifo_size);
+ rv_writel(BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
+ | BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD),
+ rtd->acp3x_base + mmACP_EXTERNAL_INTR_CNTL);
+}
+
+static int acp3x_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 -EINVAL;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ runtime->hw = acp3x_pcm_hardware_playback;
+ else
+ runtime->hw = acp3x_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->acp3x_base = adata->acp3x_base;
+ runtime->private_data = i2s_data;
+ return ret;
+}
+
+
+static int acp3x_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 acp3x_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_BT_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_BT_INSTANCE:
+ adata->capture_stream = substream;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_capture_stream = substream;
+ }
+ }
+ } else {
+ pr_err("pinfo failed\n");
+ }
+ size = params_buffer_bytes(params);
+ rtd->dma_addr = substream->runtime->dma_addr;
+ rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
+ config_acp3x_dma(rtd, substream->stream);
+ return 0;
+}
+
+static snd_pcm_uframes_t acp3x_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 acp3x_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 acp3x_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 acp3x_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_BT_INSTANCE:
+ adata->play_stream = NULL;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_play_stream = NULL;
+ }
+ } else {
+ switch (ins->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ adata->capture_stream = NULL;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ adata->i2ssp_capture_stream = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver acp3x_i2s_component = {
+ .name = DRV_NAME,
+ .open = acp3x_dma_open,
+ .close = acp3x_dma_close,
+ .hw_params = acp3x_dma_hw_params,
+ .pointer = acp3x_dma_pointer,
+ .mmap = acp3x_dma_mmap,
+ .pcm_construct = acp3x_dma_new,
+};
+
+static int acp3x_audio_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct i2s_dev_data *adata;
+ unsigned int irqflags;
+ int status;
+
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "platform_data not retrieved\n");
+ return -ENODEV;
+ }
+ irqflags = *((unsigned int *)(pdev->dev.platform_data));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+ return -ENODEV;
+ }
+
+ adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
+ if (!adata)
+ return -ENOMEM;
+
+ adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!adata->acp3x_base)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
+ return -ENODEV;
+ }
+
+ adata->i2s_irq = res->start;
+
+ dev_set_drvdata(&pdev->dev, adata);
+ status = devm_snd_soc_register_component(&pdev->dev,
+ &acp3x_i2s_component,
+ NULL, 0);
+ if (status) {
+ dev_err(&pdev->dev, "Fail to register acp i2s component\n");
+ return -ENODEV;
+ }
+ status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
+ irqflags, "ACP3x_I2S_IRQ", adata);
+ if (status) {
+ dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
+ return -ENODEV;
+ }
+
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_allow(&pdev->dev);
+ return 0;
+}
+
+static int acp3x_audio_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static int acp3x_resume(struct device *dev)
+{
+ struct i2s_dev_data *adata;
+ u32 val, reg_val, frmt_val;
+
+ reg_val = 0;
+ frmt_val = 0;
+ adata = dev_get_drvdata(dev);
+
+ if (adata->play_stream && adata->play_stream->runtime) {
+ struct i2s_stream_instance *rtd =
+ adata->play_stream->runtime->private_data;
+ config_acp3x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
+ switch (rtd->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ reg_val = mmACP_BTTDM_ITER;
+ frmt_val = mmACP_BTTDM_TXFRMT;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ reg_val = mmACP_I2STDM_ITER;
+ frmt_val = mmACP_I2STDM_TXFRMT;
+ }
+ rv_writel((rtd->xfer_resolution << 3),
+ rtd->acp3x_base + reg_val);
+ }
+ if (adata->capture_stream && adata->capture_stream->runtime) {
+ struct i2s_stream_instance *rtd =
+ adata->capture_stream->runtime->private_data;
+ config_acp3x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
+ switch (rtd->i2s_instance) {
+ case I2S_BT_INSTANCE:
+ reg_val = mmACP_BTTDM_IRER;
+ frmt_val = mmACP_BTTDM_RXFRMT;
+ break;
+ case I2S_SP_INSTANCE:
+ default:
+ reg_val = mmACP_I2STDM_IRER;
+ frmt_val = mmACP_I2STDM_RXFRMT;
+ }
+ rv_writel((rtd->xfer_resolution << 3),
+ rtd->acp3x_base + reg_val);
+ }
+ if (adata->tdm_mode == TDM_ENABLE) {
+ rv_writel(adata->tdm_fmt, adata->acp3x_base + frmt_val);
+ val = rv_readl(adata->acp3x_base + reg_val);
+ rv_writel(val | 0x2, adata->acp3x_base + reg_val);
+ }
+ rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
+ return 0;
+}
+
+
+static int acp3x_pcm_runtime_suspend(struct device *dev)
+{
+ struct i2s_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+
+ rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
+
+ return 0;
+}
+
+static int acp3x_pcm_runtime_resume(struct device *dev)
+{
+ struct i2s_dev_data *adata;
+
+ adata = dev_get_drvdata(dev);
+
+ rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
+ return 0;
+}
+
+static const struct dev_pm_ops acp3x_pm_ops = {
+ .runtime_suspend = acp3x_pcm_runtime_suspend,
+ .runtime_resume = acp3x_pcm_runtime_resume,
+ .resume = acp3x_resume,
+};
+
+static struct platform_driver acp3x_dma_driver = {
+ .probe = acp3x_audio_probe,
+ .remove = acp3x_audio_remove,
+ .driver = {
+ .name = "acp3x_rv_i2s_dma",
+ .pm = &acp3x_pm_ops,
+ },
+};
+
+module_platform_driver(acp3x_dma_driver);
+
+MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
+MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRV_NAME);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 18:41:19 +0000