diff options
Diffstat (limited to 'sound/soc/amd/vangogh/acp5x-i2s.c')
| -rw-r--r-- | sound/soc/amd/vangogh/acp5x-i2s.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/sound/soc/amd/vangogh/acp5x-i2s.c b/sound/soc/amd/vangogh/acp5x-i2s.c new file mode 100644 index 000000000..773e96f1b --- /dev/null +++ b/sound/soc/amd/vangogh/acp5x-i2s.c @@ -0,0 +1,416 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// AMD ALSA SoC PCM Driver +// +// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved. + +#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 "acp5x.h" + +#define DRV_NAME "acp5x_i2s_playcap" + +static int acp5x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, + unsigned int fmt) +{ + struct i2s_dev_data *adata; + int mode; + + adata = snd_soc_dai_get_drvdata(cpu_dai); + mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK; + switch (mode) { + case SND_SOC_DAIFMT_I2S: + adata->tdm_mode = TDM_DISABLE; + break; + case SND_SOC_DAIFMT_DSP_A: + adata->tdm_mode = TDM_ENABLE; + break; + default: + return -EINVAL; + } + mode = fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK; + switch (mode) { + case SND_SOC_DAIFMT_BP_FP: + adata->master_mode = I2S_MASTER_MODE_ENABLE; + break; + case SND_SOC_DAIFMT_BC_FC: + adata->master_mode = I2S_MASTER_MODE_DISABLE; + break; + } + return 0; +} + +static int acp5x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, + u32 tx_mask, u32 rx_mask, + int slots, int slot_width) +{ + struct i2s_dev_data *adata; + u32 frm_len; + u16 slot_len; + + adata = snd_soc_dai_get_drvdata(cpu_dai); + + /* These values are as per Hardware Spec */ + switch (slot_width) { + case SLOT_WIDTH_8: + slot_len = 8; + break; + case SLOT_WIDTH_16: + slot_len = 16; + break; + case SLOT_WIDTH_24: + slot_len = 24; + break; + case SLOT_WIDTH_32: + slot_len = 0; + break; + default: + return -EINVAL; + } + frm_len = FRM_LEN | (slots << 15) | (slot_len << 18); + adata->tdm_fmt = frm_len; + return 0; +} + +static int acp5x_i2s_hwparams(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + 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; + + u32 val; + u32 reg_val, frmt_reg; + u32 lrclk_div_val, bclk_div_val; + + lrclk_div_val = 0; + bclk_div_val = 0; + prtd = asoc_substream_to_rtd(substream); + rtd = substream->runtime->private_data; + card = prtd->card; + adata = snd_soc_dai_get_drvdata(dai); + pinfo = snd_soc_card_get_drvdata(card); + if (pinfo) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + rtd->i2s_instance = pinfo->play_i2s_instance; + else + rtd->i2s_instance = pinfo->cap_i2s_instance; + } + + /* These values are as per Hardware Spec */ + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_U8: + case SNDRV_PCM_FORMAT_S8: + rtd->xfer_resolution = 0x0; + break; + case SNDRV_PCM_FORMAT_S16_LE: + rtd->xfer_resolution = 0x02; + break; + case SNDRV_PCM_FORMAT_S24_LE: + rtd->xfer_resolution = 0x04; + break; + case SNDRV_PCM_FORMAT_S32_LE: + rtd->xfer_resolution = 0x05; + break; + default: + return -EINVAL; + } + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + reg_val = ACP_HSTDM_ITER; + frmt_reg = ACP_HSTDM_TXFRMT; + break; + case I2S_SP_INSTANCE: + default: + reg_val = ACP_I2STDM_ITER; + frmt_reg = ACP_I2STDM_TXFRMT; + } + } else { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + reg_val = ACP_HSTDM_IRER; + frmt_reg = ACP_HSTDM_RXFRMT; + break; + case I2S_SP_INSTANCE: + default: + reg_val = ACP_I2STDM_IRER; + frmt_reg = ACP_I2STDM_RXFRMT; + } + } + if (adata->tdm_mode) { + val = acp_readl(rtd->acp5x_base + reg_val); + acp_writel(val | 0x2, rtd->acp5x_base + reg_val); + acp_writel(adata->tdm_fmt, rtd->acp5x_base + frmt_reg); + } + val = acp_readl(rtd->acp5x_base + reg_val); + val &= ~ACP5x_ITER_IRER_SAMP_LEN_MASK; + val = val | (rtd->xfer_resolution << 3); + acp_writel(val, rtd->acp5x_base + reg_val); + + if (adata->master_mode) { + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + switch (params_rate(params)) { + case 8000: + bclk_div_val = 768; + break; + case 16000: + bclk_div_val = 384; + break; + case 24000: + bclk_div_val = 256; + break; + case 32000: + bclk_div_val = 192; + break; + case 44100: + case 48000: + bclk_div_val = 128; + break; + case 88200: + case 96000: + bclk_div_val = 64; + break; + case 192000: + bclk_div_val = 32; + break; + default: + return -EINVAL; + } + lrclk_div_val = 32; + break; + case SNDRV_PCM_FORMAT_S32_LE: + switch (params_rate(params)) { + case 8000: + bclk_div_val = 384; + break; + case 16000: + bclk_div_val = 192; + break; + case 24000: + bclk_div_val = 128; + break; + case 32000: + bclk_div_val = 96; + break; + case 44100: + case 48000: + bclk_div_val = 64; + break; + case 88200: + case 96000: + bclk_div_val = 32; + break; + case 192000: + bclk_div_val = 16; + break; + default: + return -EINVAL; + } + lrclk_div_val = 64; + break; + default: + return -EINVAL; + } + rtd->lrclk_div = lrclk_div_val; + rtd->bclk_div = bclk_div_val; + } + return 0; +} + +static int acp5x_i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct i2s_stream_instance *rtd; + struct i2s_dev_data *adata; + u32 ret, val, period_bytes, reg_val, ier_val, water_val; + u32 buf_size, buf_reg; + + adata = snd_soc_dai_get_drvdata(dai); + rtd = substream->runtime->private_data; + 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: + rtd->bytescount = acp_get_byte_count(rtd, + substream->stream); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + water_val = + ACP_HS_TX_INTR_WATERMARK_SIZE; + reg_val = ACP_HSTDM_ITER; + ier_val = ACP_HSTDM_IER; + buf_reg = ACP_HS_TX_RINGBUFSIZE; + break; + case I2S_SP_INSTANCE: + default: + water_val = + ACP_I2S_TX_INTR_WATERMARK_SIZE; + reg_val = ACP_I2STDM_ITER; + ier_val = ACP_I2STDM_IER; + buf_reg = ACP_I2S_TX_RINGBUFSIZE; + } + } else { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + water_val = + ACP_HS_RX_INTR_WATERMARK_SIZE; + reg_val = ACP_HSTDM_IRER; + ier_val = ACP_HSTDM_IER; + buf_reg = ACP_HS_RX_RINGBUFSIZE; + break; + case I2S_SP_INSTANCE: + default: + water_val = + ACP_I2S_RX_INTR_WATERMARK_SIZE; + reg_val = ACP_I2STDM_IRER; + ier_val = ACP_I2STDM_IER; + buf_reg = ACP_I2S_RX_RINGBUFSIZE; + } + } + acp_writel(period_bytes, rtd->acp5x_base + water_val); + acp_writel(buf_size, rtd->acp5x_base + buf_reg); + if (adata->master_mode) + acp5x_set_i2s_clk(adata, rtd); + val = acp_readl(rtd->acp5x_base + reg_val); + val = val | BIT(0); + acp_writel(val, rtd->acp5x_base + reg_val); + acp_writel(1, rtd->acp5x_base + ier_val); + ret = 0; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + reg_val = ACP_HSTDM_ITER; + break; + case I2S_SP_INSTANCE: + default: + reg_val = ACP_I2STDM_ITER; + } + + } else { + switch (rtd->i2s_instance) { + case I2S_HS_INSTANCE: + reg_val = ACP_HSTDM_IRER; + break; + case I2S_SP_INSTANCE: + default: + reg_val = ACP_I2STDM_IRER; + } + } + val = acp_readl(rtd->acp5x_base + reg_val); + val = val & ~BIT(0); + acp_writel(val, rtd->acp5x_base + reg_val); + + if (!(acp_readl(rtd->acp5x_base + ACP_HSTDM_ITER) & BIT(0)) && + !(acp_readl(rtd->acp5x_base + ACP_HSTDM_IRER) & BIT(0))) + acp_writel(0, rtd->acp5x_base + ACP_HSTDM_IER); + if (!(acp_readl(rtd->acp5x_base + ACP_I2STDM_ITER) & BIT(0)) && + !(acp_readl(rtd->acp5x_base + ACP_I2STDM_IRER) & BIT(0))) + acp_writel(0, rtd->acp5x_base + ACP_I2STDM_IER); + ret = 0; + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static const struct snd_soc_dai_ops acp5x_i2s_dai_ops = { + .hw_params = acp5x_i2s_hwparams, + .trigger = acp5x_i2s_trigger, + .set_fmt = acp5x_i2s_set_fmt, + .set_tdm_slot = acp5x_i2s_set_tdm_slot, +}; + +static const struct snd_soc_component_driver acp5x_dai_component = { + .name = "acp5x-i2s", + .legacy_dai_naming = 1, +}; + +static struct snd_soc_dai_driver acp5x_i2s_dai = { + .playback = { + .rates = SNDRV_PCM_RATE_8000_96000, + .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, + .rate_min = 8000, + .rate_max = 96000, + }, + .capture = { + .rates = SNDRV_PCM_RATE_8000_96000, + .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, + .rate_min = 8000, + .rate_max = 96000, + }, + .ops = &acp5x_i2s_dai_ops, +}; + +static int acp5x_dai_probe(struct platform_device *pdev) +{ + struct resource *res; + struct i2s_dev_data *adata; + int ret; + + adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data), + GFP_KERNEL); + if (!adata) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); + return -ENOMEM; + } + adata->acp5x_base = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!adata->acp5x_base) + return -ENOMEM; + + adata->master_mode = I2S_MASTER_MODE_ENABLE; + dev_set_drvdata(&pdev->dev, adata); + ret = devm_snd_soc_register_component(&pdev->dev, + &acp5x_dai_component, + &acp5x_i2s_dai, 1); + if (ret) + dev_err(&pdev->dev, "Fail to register acp i2s dai\n"); + return ret; +} + +static struct platform_driver acp5x_dai_driver = { + .probe = acp5x_dai_probe, + .driver = { + .name = "acp5x_i2s_playcap", + }, +}; + +module_platform_driver(acp5x_dai_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD ACP5.x CPU DAI Driver"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_LICENSE("GPL v2"); |