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339 lines
8.3 KiB
339 lines
8.3 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// AMD ALSA SoC PCM Driver |
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// |
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//Copyright 2016 Advanced Micro Devices, Inc. |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dai.h> |
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#include <linux/dma-mapping.h> |
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#include "acp3x.h" |
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#define DRV_NAME "acp3x_i2s_playcap" |
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static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, |
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unsigned int fmt) |
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{ |
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struct i2s_dev_data *adata; |
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int mode; |
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adata = snd_soc_dai_get_drvdata(cpu_dai); |
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mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK; |
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switch (mode) { |
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case SND_SOC_DAIFMT_I2S: |
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adata->tdm_mode = TDM_DISABLE; |
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break; |
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case SND_SOC_DAIFMT_DSP_A: |
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adata->tdm_mode = TDM_ENABLE; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, |
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u32 tx_mask, u32 rx_mask, int slots, int slot_width) |
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{ |
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struct i2s_dev_data *adata; |
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u32 frm_len; |
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u16 slot_len; |
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adata = snd_soc_dai_get_drvdata(cpu_dai); |
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/* These values are as per Hardware Spec */ |
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switch (slot_width) { |
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case SLOT_WIDTH_8: |
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slot_len = 8; |
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break; |
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case SLOT_WIDTH_16: |
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slot_len = 16; |
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break; |
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case SLOT_WIDTH_24: |
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slot_len = 24; |
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break; |
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case SLOT_WIDTH_32: |
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slot_len = 0; |
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break; |
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default: |
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return -EINVAL; |
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} |
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frm_len = FRM_LEN | (slots << 15) | (slot_len << 18); |
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adata->tdm_fmt = frm_len; |
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return 0; |
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} |
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static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) |
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{ |
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struct i2s_stream_instance *rtd; |
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struct snd_soc_pcm_runtime *prtd; |
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struct snd_soc_card *card; |
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struct acp3x_platform_info *pinfo; |
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struct i2s_dev_data *adata; |
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u32 val; |
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u32 reg_val, frmt_reg; |
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prtd = asoc_substream_to_rtd(substream); |
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rtd = substream->runtime->private_data; |
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card = prtd->card; |
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adata = snd_soc_dai_get_drvdata(dai); |
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pinfo = snd_soc_card_get_drvdata(card); |
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if (pinfo) { |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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rtd->i2s_instance = pinfo->play_i2s_instance; |
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else |
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rtd->i2s_instance = pinfo->cap_i2s_instance; |
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} |
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/* These values are as per Hardware Spec */ |
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switch (params_format(params)) { |
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case SNDRV_PCM_FORMAT_U8: |
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case SNDRV_PCM_FORMAT_S8: |
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rtd->xfer_resolution = 0x0; |
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break; |
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case SNDRV_PCM_FORMAT_S16_LE: |
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rtd->xfer_resolution = 0x02; |
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break; |
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case SNDRV_PCM_FORMAT_S24_LE: |
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rtd->xfer_resolution = 0x04; |
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break; |
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case SNDRV_PCM_FORMAT_S32_LE: |
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rtd->xfer_resolution = 0x05; |
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break; |
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default: |
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return -EINVAL; |
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} |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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reg_val = mmACP_BTTDM_ITER; |
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frmt_reg = mmACP_BTTDM_TXFRMT; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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reg_val = mmACP_I2STDM_ITER; |
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frmt_reg = mmACP_I2STDM_TXFRMT; |
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} |
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} else { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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reg_val = mmACP_BTTDM_IRER; |
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frmt_reg = mmACP_BTTDM_RXFRMT; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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reg_val = mmACP_I2STDM_IRER; |
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frmt_reg = mmACP_I2STDM_RXFRMT; |
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} |
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} |
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if (adata->tdm_mode) { |
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val = rv_readl(rtd->acp3x_base + reg_val); |
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rv_writel(val | 0x2, rtd->acp3x_base + reg_val); |
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rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg); |
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} |
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val = rv_readl(rtd->acp3x_base + reg_val); |
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val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK; |
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val = val | (rtd->xfer_resolution << 3); |
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rv_writel(val, rtd->acp3x_base + reg_val); |
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return 0; |
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} |
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static int acp3x_i2s_trigger(struct snd_pcm_substream *substream, |
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int cmd, struct snd_soc_dai *dai) |
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{ |
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struct i2s_stream_instance *rtd; |
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u32 ret, val, period_bytes, reg_val, ier_val, water_val; |
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u32 buf_size, buf_reg; |
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rtd = substream->runtime->private_data; |
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period_bytes = frames_to_bytes(substream->runtime, |
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substream->runtime->period_size); |
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buf_size = frames_to_bytes(substream->runtime, |
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substream->runtime->buffer_size); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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rtd->bytescount = acp_get_byte_count(rtd, |
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substream->stream); |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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water_val = |
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mmACP_BT_TX_INTR_WATERMARK_SIZE; |
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reg_val = mmACP_BTTDM_ITER; |
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ier_val = mmACP_BTTDM_IER; |
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buf_reg = mmACP_BT_TX_RINGBUFSIZE; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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water_val = |
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mmACP_I2S_TX_INTR_WATERMARK_SIZE; |
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reg_val = mmACP_I2STDM_ITER; |
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ier_val = mmACP_I2STDM_IER; |
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buf_reg = mmACP_I2S_TX_RINGBUFSIZE; |
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} |
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} else { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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water_val = |
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mmACP_BT_RX_INTR_WATERMARK_SIZE; |
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reg_val = mmACP_BTTDM_IRER; |
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ier_val = mmACP_BTTDM_IER; |
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buf_reg = mmACP_BT_RX_RINGBUFSIZE; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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water_val = |
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mmACP_I2S_RX_INTR_WATERMARK_SIZE; |
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reg_val = mmACP_I2STDM_IRER; |
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ier_val = mmACP_I2STDM_IER; |
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buf_reg = mmACP_I2S_RX_RINGBUFSIZE; |
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} |
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} |
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rv_writel(period_bytes, rtd->acp3x_base + water_val); |
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rv_writel(buf_size, rtd->acp3x_base + buf_reg); |
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val = rv_readl(rtd->acp3x_base + reg_val); |
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val = val | BIT(0); |
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rv_writel(val, rtd->acp3x_base + reg_val); |
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rv_writel(1, rtd->acp3x_base + ier_val); |
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ret = 0; |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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reg_val = mmACP_BTTDM_ITER; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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reg_val = mmACP_I2STDM_ITER; |
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} |
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} else { |
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switch (rtd->i2s_instance) { |
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case I2S_BT_INSTANCE: |
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reg_val = mmACP_BTTDM_IRER; |
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break; |
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case I2S_SP_INSTANCE: |
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default: |
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reg_val = mmACP_I2STDM_IRER; |
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} |
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} |
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val = rv_readl(rtd->acp3x_base + reg_val); |
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val = val & ~BIT(0); |
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rv_writel(val, rtd->acp3x_base + reg_val); |
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if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) && |
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!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0))) |
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rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER); |
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if (!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER) & BIT(0)) && |
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!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_IRER) & BIT(0))) |
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rv_writel(0, rtd->acp3x_base + mmACP_I2STDM_IER); |
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ret = 0; |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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return ret; |
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} |
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static struct snd_soc_dai_ops acp3x_i2s_dai_ops = { |
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.hw_params = acp3x_i2s_hwparams, |
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.trigger = acp3x_i2s_trigger, |
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.set_fmt = acp3x_i2s_set_fmt, |
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.set_tdm_slot = acp3x_i2s_set_tdm_slot, |
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}; |
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static const struct snd_soc_component_driver acp3x_dai_component = { |
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.name = DRV_NAME, |
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}; |
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static struct snd_soc_dai_driver acp3x_i2s_dai = { |
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.playback = { |
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.rates = SNDRV_PCM_RATE_8000_96000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | |
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SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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.channels_min = 2, |
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.channels_max = 8, |
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.rate_min = 8000, |
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.rate_max = 96000, |
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}, |
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.capture = { |
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.rates = SNDRV_PCM_RATE_8000_48000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | |
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SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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.channels_min = 2, |
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.channels_max = 2, |
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.rate_min = 8000, |
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.rate_max = 48000, |
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}, |
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.ops = &acp3x_i2s_dai_ops, |
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}; |
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static int acp3x_dai_probe(struct platform_device *pdev) |
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{ |
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struct resource *res; |
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struct i2s_dev_data *adata; |
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int ret; |
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adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data), |
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GFP_KERNEL); |
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if (!adata) |
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return -ENOMEM; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!res) { |
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dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); |
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return -ENOMEM; |
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} |
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adata->acp3x_base = devm_ioremap(&pdev->dev, res->start, |
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resource_size(res)); |
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if (!adata->acp3x_base) |
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return -ENOMEM; |
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adata->i2s_irq = res->start; |
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dev_set_drvdata(&pdev->dev, adata); |
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ret = devm_snd_soc_register_component(&pdev->dev, |
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&acp3x_dai_component, &acp3x_i2s_dai, 1); |
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if (ret) { |
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dev_err(&pdev->dev, "Fail to register acp i2s dai\n"); |
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return -ENODEV; |
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} |
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return 0; |
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} |
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static int acp3x_dai_remove(struct platform_device *pdev) |
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{ |
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/* As we use devm_ memory alloc there is nothing TBD here */ |
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return 0; |
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} |
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static struct platform_driver acp3x_dai_driver = { |
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.probe = acp3x_dai_probe, |
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.remove = acp3x_dai_remove, |
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.driver = { |
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.name = "acp3x_i2s_playcap", |
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}, |
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}; |
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module_platform_driver(acp3x_dai_driver); |
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MODULE_AUTHOR("[email protected]"); |
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MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_ALIAS("platform:"DRV_NAME);
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