diff options
Diffstat (limited to 'sound/soc/amd/acp/acp-i2s.c')
| -rw-r--r-- | sound/soc/amd/acp/acp-i2s.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/sound/soc/amd/acp/acp-i2s.c b/sound/soc/amd/acp/acp-i2s.c new file mode 100644 index 000000000000..ce9aca8dd6f5 --- /dev/null +++ b/sound/soc/amd/acp/acp-i2s.c @@ -0,0 +1,340 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) +// +// This file is provided under a dual BSD/GPLv2 license. When using or +// redistributing this file, you may do so under either license. +// +// Copyright(c) 2021 Advanced Micro Devices, Inc. +// +// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> +// + +/* + * Generic Hardware interface for ACP Audio I2S controller + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/io.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <linux/dma-mapping.h> + +#include "amd.h" + +#define DRV_NAME "acp_i2s_playcap" + +static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct device *dev = dai->component->dev; + struct acp_dev_data *adata; + u32 val; + u32 xfer_resolution; + u32 reg_val; + + adata = snd_soc_dai_get_drvdata(dai); + + /* These values are as per Hardware Spec */ + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_U8: + case SNDRV_PCM_FORMAT_S8: + xfer_resolution = 0x0; + break; + case SNDRV_PCM_FORMAT_S16_LE: + xfer_resolution = 0x02; + break; + case SNDRV_PCM_FORMAT_S24_LE: + xfer_resolution = 0x04; + break; + case SNDRV_PCM_FORMAT_S32_LE: + xfer_resolution = 0x05; + break; + default: + return -EINVAL; + } + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + reg_val = ACP_BTTDM_ITER; + break; + case I2S_SP_INSTANCE: + reg_val = ACP_I2STDM_ITER; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + } else { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + reg_val = ACP_BTTDM_IRER; + break; + case I2S_SP_INSTANCE: + reg_val = ACP_I2STDM_IRER; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + } + + val = readl(adata->acp_base + reg_val); + val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK; + val = val | (xfer_resolution << 3); + writel(val, adata->acp_base + reg_val); + + return 0; +} + +static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) +{ + struct acp_stream *stream = substream->runtime->private_data; + struct device *dev = dai->component->dev; + struct acp_dev_data *adata = dev_get_drvdata(dev); + u32 val, period_bytes, reg_val, ier_val, water_val, buf_size, buf_reg; + + period_bytes = frames_to_bytes(substream->runtime, substream->runtime->period_size); + buf_size = frames_to_bytes(substream->runtime, substream->runtime->buffer_size); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + stream->bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + water_val = ACP_BT_TX_INTR_WATERMARK_SIZE; + reg_val = ACP_BTTDM_ITER; + ier_val = ACP_BTTDM_IER; + buf_reg = ACP_BT_TX_RINGBUFSIZE; + break; + case I2S_SP_INSTANCE: + water_val = ACP_I2S_TX_INTR_WATERMARK_SIZE; + reg_val = ACP_I2STDM_ITER; + ier_val = ACP_I2STDM_IER; + buf_reg = ACP_I2S_TX_RINGBUFSIZE; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + } else { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + water_val = ACP_BT_RX_INTR_WATERMARK_SIZE; + reg_val = ACP_BTTDM_IRER; + ier_val = ACP_BTTDM_IER; + buf_reg = ACP_BT_RX_RINGBUFSIZE; + break; + case I2S_SP_INSTANCE: + water_val = ACP_I2S_RX_INTR_WATERMARK_SIZE; + reg_val = ACP_I2STDM_IRER; + ier_val = ACP_I2STDM_IER; + buf_reg = ACP_I2S_RX_RINGBUFSIZE; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + } + writel(period_bytes, adata->acp_base + water_val); + writel(buf_size, adata->acp_base + buf_reg); + val = readl(adata->acp_base + reg_val); + val = val | BIT(0); + writel(val, adata->acp_base + reg_val); + writel(1, adata->acp_base + ier_val); + return 0; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + reg_val = ACP_BTTDM_ITER; + break; + case I2S_SP_INSTANCE: + reg_val = ACP_I2STDM_ITER; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + + } else { + switch (dai->driver->id) { + case I2S_BT_INSTANCE: + reg_val = ACP_BTTDM_IRER; + break; + case I2S_SP_INSTANCE: + reg_val = ACP_I2STDM_IRER; + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + } + val = readl(adata->acp_base + reg_val); + val = val & ~BIT(0); + writel(val, adata->acp_base + reg_val); + + if (!(readl(adata->acp_base + ACP_BTTDM_ITER) & BIT(0)) && + !(readl(adata->acp_base + ACP_BTTDM_IRER) & BIT(0))) + writel(0, adata->acp_base + ACP_BTTDM_IER); + if (!(readl(adata->acp_base + ACP_I2STDM_ITER) & BIT(0)) && + !(readl(adata->acp_base + ACP_I2STDM_IRER) & BIT(0))) + writel(0, adata->acp_base + ACP_I2STDM_IER); + return 0; + default: + return -EINVAL; + } + + return 0; +} + +static int acp_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) +{ + struct device *dev = dai->component->dev; + struct acp_dev_data *adata = dev_get_drvdata(dev); + struct acp_stream *stream = substream->runtime->private_data; + u32 reg_dma_size = 0, reg_fifo_size = 0, reg_fifo_addr = 0; + u32 phy_addr = 0, acp_fifo_addr = 0, ext_int_ctrl; + unsigned int dir = substream->stream; + + switch (dai->driver->id) { + case I2S_SP_INSTANCE: + if (dir == SNDRV_PCM_STREAM_PLAYBACK) { + 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; + + phy_addr = I2S_SP_TX_MEM_WINDOW_START + stream->reg_offset; + writel(phy_addr, adata->acp_base + ACP_I2S_TX_RINGBUFADDR); + } else { + 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; + phy_addr = I2S_SP_RX_MEM_WINDOW_START + stream->reg_offset; + writel(phy_addr, adata->acp_base + ACP_I2S_RX_RINGBUFADDR); + } + break; + case I2S_BT_INSTANCE: + if (dir == SNDRV_PCM_STREAM_PLAYBACK) { + reg_dma_size = ACP_BT_TX_DMA_SIZE; + acp_fifo_addr = ACP_SRAM_PTE_OFFSET + + BT_PB_FIFO_ADDR_OFFSET; + reg_fifo_addr = ACP_BT_TX_FIFOADDR; + reg_fifo_size = ACP_BT_TX_FIFOSIZE; + + phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset; + writel(phy_addr, adata->acp_base + ACP_BT_TX_RINGBUFADDR); + } else { + reg_dma_size = ACP_BT_RX_DMA_SIZE; + acp_fifo_addr = ACP_SRAM_PTE_OFFSET + + BT_CAPT_FIFO_ADDR_OFFSET; + reg_fifo_addr = ACP_BT_RX_FIFOADDR; + reg_fifo_size = ACP_BT_RX_FIFOSIZE; + + phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset; + writel(phy_addr, adata->acp_base + ACP_BT_RX_RINGBUFADDR); + } + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + + writel(DMA_SIZE, adata->acp_base + reg_dma_size); + writel(acp_fifo_addr, adata->acp_base + reg_fifo_addr); + writel(FIFO_SIZE, adata->acp_base + reg_fifo_size); + + ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_int_ctrl |= BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD) + | BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD); + + writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL); + + return 0; +} + +static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) +{ + struct acp_stream *stream = substream->runtime->private_data; + struct device *dev = dai->component->dev; + unsigned int dir = substream->stream; + unsigned int irq_bit = 0; + + switch (dai->driver->id) { + case I2S_SP_INSTANCE: + if (dir == SNDRV_PCM_STREAM_PLAYBACK) { + irq_bit = BIT(I2S_TX_THRESHOLD); + stream->pte_offset = ACP_SRAM_SP_PB_PTE_OFFSET; + stream->fifo_offset = SP_PB_FIFO_ADDR_OFFSET; + } else { + irq_bit = BIT(I2S_RX_THRESHOLD); + stream->pte_offset = ACP_SRAM_SP_CP_PTE_OFFSET; + stream->fifo_offset = SP_CAPT_FIFO_ADDR_OFFSET; + } + break; + case I2S_BT_INSTANCE: + if (dir == SNDRV_PCM_STREAM_PLAYBACK) { + irq_bit = BIT(BT_TX_THRESHOLD); + stream->pte_offset = ACP_SRAM_BT_PB_PTE_OFFSET; + stream->fifo_offset = BT_PB_FIFO_ADDR_OFFSET; + } else { + irq_bit = BIT(BT_RX_THRESHOLD); + stream->pte_offset = ACP_SRAM_BT_CP_PTE_OFFSET; + stream->fifo_offset = BT_CAPT_FIFO_ADDR_OFFSET; + } + break; + default: + dev_err(dev, "Invalid dai id %x\n", dai->driver->id); + return -EINVAL; + } + + /* Save runtime dai configuration in stream */ + stream->id = dai->driver->id + dir; + stream->dai_id = dai->driver->id; + stream->irq_bit = irq_bit; + + return 0; +} + +const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops = { + .startup = acp_i2s_startup, + .hw_params = acp_i2s_hwparams, + .prepare = acp_i2s_prepare, + .trigger = acp_i2s_trigger, +}; +EXPORT_SYMBOL_NS_GPL(asoc_acp_cpu_dai_ops, SND_SOC_ACP_COMMON); + +int asoc_acp_i2s_probe(struct snd_soc_dai *dai) +{ + struct device *dev = dai->component->dev; + struct acp_dev_data *adata = dev_get_drvdata(dev); + unsigned int val; + + if (!adata->acp_base) { + dev_err(dev, "I2S base is NULL\n"); + return -EINVAL; + } + + val = readl(adata->acp_base + ACP_I2S_PIN_CONFIG); + if (val != I2S_MODE) { + dev_err(dev, "I2S Mode not supported val %x\n", val); + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_NS_GPL(asoc_acp_i2s_probe, SND_SOC_ACP_COMMON); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_ALIAS(DRV_NAME); |