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622 lines
15 KiB
622 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* IMG I2S input controller driver |
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* |
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* Copyright (C) 2015 Imagination Technologies Ltd. |
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* |
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* Author: Damien Horsley <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/reset.h> |
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#include <sound/core.h> |
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#include <sound/dmaengine_pcm.h> |
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#include <sound/initval.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#define IMG_I2S_IN_RX_FIFO 0x0 |
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#define IMG_I2S_IN_CTL 0x4 |
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#define IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK 0xfffffffc |
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#define IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT 2 |
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#define IMG_I2S_IN_CTL_16PACK_MASK BIT(1) |
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#define IMG_I2S_IN_CTL_ME_MASK BIT(0) |
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#define IMG_I2S_IN_CH_CTL 0x4 |
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#define IMG_I2S_IN_CH_CTL_CCDEL_MASK 0x38000 |
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#define IMG_I2S_IN_CH_CTL_CCDEL_SHIFT 15 |
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#define IMG_I2S_IN_CH_CTL_FEN_MASK BIT(14) |
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#define IMG_I2S_IN_CH_CTL_FMODE_MASK BIT(13) |
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#define IMG_I2S_IN_CH_CTL_16PACK_MASK BIT(12) |
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#define IMG_I2S_IN_CH_CTL_JUST_MASK BIT(10) |
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#define IMG_I2S_IN_CH_CTL_PACKH_MASK BIT(9) |
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#define IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK BIT(8) |
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#define IMG_I2S_IN_CH_CTL_BLKP_MASK BIT(7) |
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#define IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK BIT(6) |
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#define IMG_I2S_IN_CH_CTL_LRD_MASK BIT(3) |
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#define IMG_I2S_IN_CH_CTL_FW_MASK BIT(2) |
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#define IMG_I2S_IN_CH_CTL_SW_MASK BIT(1) |
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#define IMG_I2S_IN_CH_CTL_ME_MASK BIT(0) |
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#define IMG_I2S_IN_CH_STRIDE 0x20 |
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struct img_i2s_in { |
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void __iomem *base; |
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struct clk *clk_sys; |
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struct snd_dmaengine_dai_dma_data dma_data; |
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struct device *dev; |
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unsigned int max_i2s_chan; |
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void __iomem *channel_base; |
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unsigned int active_channels; |
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struct snd_soc_dai_driver dai_driver; |
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u32 suspend_ctl; |
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u32 *suspend_ch_ctl; |
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}; |
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static int img_i2s_in_runtime_suspend(struct device *dev) |
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{ |
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struct img_i2s_in *i2s = dev_get_drvdata(dev); |
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clk_disable_unprepare(i2s->clk_sys); |
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return 0; |
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} |
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static int img_i2s_in_runtime_resume(struct device *dev) |
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{ |
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struct img_i2s_in *i2s = dev_get_drvdata(dev); |
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int ret; |
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ret = clk_prepare_enable(i2s->clk_sys); |
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if (ret) { |
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dev_err(dev, "Unable to enable sys clock\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg) |
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{ |
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writel(val, i2s->base + reg); |
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} |
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static inline u32 img_i2s_in_readl(struct img_i2s_in *i2s, u32 reg) |
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{ |
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return readl(i2s->base + reg); |
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} |
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static inline void img_i2s_in_ch_writel(struct img_i2s_in *i2s, u32 chan, |
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u32 val, u32 reg) |
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{ |
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writel(val, i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg); |
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} |
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static inline u32 img_i2s_in_ch_readl(struct img_i2s_in *i2s, u32 chan, |
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u32 reg) |
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{ |
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return readl(i2s->channel_base + (chan * IMG_I2S_IN_CH_STRIDE) + reg); |
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} |
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static inline void img_i2s_in_ch_disable(struct img_i2s_in *i2s, u32 chan) |
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{ |
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u32 reg; |
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reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL); |
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reg &= ~IMG_I2S_IN_CH_CTL_ME_MASK; |
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img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL); |
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} |
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static inline void img_i2s_in_ch_enable(struct img_i2s_in *i2s, u32 chan) |
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{ |
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u32 reg; |
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reg = img_i2s_in_ch_readl(i2s, chan, IMG_I2S_IN_CH_CTL); |
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reg |= IMG_I2S_IN_CH_CTL_ME_MASK; |
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img_i2s_in_ch_writel(i2s, chan, reg, IMG_I2S_IN_CH_CTL); |
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} |
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static inline void img_i2s_in_disable(struct img_i2s_in *i2s) |
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{ |
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u32 reg; |
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reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); |
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reg &= ~IMG_I2S_IN_CTL_ME_MASK; |
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img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); |
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} |
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static inline void img_i2s_in_enable(struct img_i2s_in *i2s) |
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{ |
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u32 reg; |
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reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); |
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reg |= IMG_I2S_IN_CTL_ME_MASK; |
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img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); |
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} |
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static inline void img_i2s_in_flush(struct img_i2s_in *i2s) |
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{ |
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int i; |
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u32 reg; |
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for (i = 0; i < i2s->active_channels; i++) { |
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reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); |
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reg |= IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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reg &= ~IMG_I2S_IN_CH_CTL_FIFO_FLUSH_MASK; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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} |
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} |
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static int img_i2s_in_trigger(struct snd_pcm_substream *substream, int cmd, |
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struct snd_soc_dai *dai) |
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{ |
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struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); |
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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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img_i2s_in_enable(i2s); |
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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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img_i2s_in_disable(i2s); |
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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 img_i2s_in_check_rate(struct img_i2s_in *i2s, |
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unsigned int sample_rate, unsigned int frame_size, |
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unsigned int *bclk_filter_enable, |
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unsigned int *bclk_filter_value) |
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{ |
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unsigned int bclk_freq, cur_freq; |
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bclk_freq = sample_rate * frame_size; |
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cur_freq = clk_get_rate(i2s->clk_sys); |
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if (cur_freq >= bclk_freq * 8) { |
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*bclk_filter_enable = 1; |
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*bclk_filter_value = 0; |
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} else if (cur_freq >= bclk_freq * 7) { |
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*bclk_filter_enable = 1; |
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*bclk_filter_value = 1; |
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} else if (cur_freq >= bclk_freq * 6) { |
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*bclk_filter_enable = 0; |
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*bclk_filter_value = 0; |
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} else { |
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dev_err(i2s->dev, |
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"Sys clock rate %u insufficient for sample rate %u\n", |
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cur_freq, sample_rate); |
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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 img_i2s_in_hw_params(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 img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); |
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unsigned int rate, channels, i2s_channels, frame_size; |
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unsigned int bclk_filter_enable, bclk_filter_value; |
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int i, ret = 0; |
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u32 reg, control_mask, chan_control_mask; |
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u32 control_set = 0, chan_control_set = 0; |
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snd_pcm_format_t format; |
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rate = params_rate(params); |
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format = params_format(params); |
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channels = params_channels(params); |
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i2s_channels = channels / 2; |
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switch (format) { |
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case SNDRV_PCM_FORMAT_S32_LE: |
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frame_size = 64; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_PACKH_MASK; |
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break; |
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case SNDRV_PCM_FORMAT_S24_LE: |
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frame_size = 64; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_SW_MASK; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_FW_MASK; |
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break; |
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case SNDRV_PCM_FORMAT_S16_LE: |
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frame_size = 32; |
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control_set |= IMG_I2S_IN_CTL_16PACK_MASK; |
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chan_control_set |= IMG_I2S_IN_CH_CTL_16PACK_MASK; |
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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 ((channels < 2) || |
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(channels > (i2s->max_i2s_chan * 2)) || |
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(channels % 2)) |
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return -EINVAL; |
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control_set |= ((i2s_channels - 1) << IMG_I2S_IN_CTL_ACTIVE_CH_SHIFT); |
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ret = img_i2s_in_check_rate(i2s, rate, frame_size, |
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&bclk_filter_enable, &bclk_filter_value); |
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if (ret < 0) |
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return ret; |
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if (bclk_filter_enable) |
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chan_control_set |= IMG_I2S_IN_CH_CTL_FEN_MASK; |
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if (bclk_filter_value) |
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chan_control_set |= IMG_I2S_IN_CH_CTL_FMODE_MASK; |
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control_mask = IMG_I2S_IN_CTL_16PACK_MASK | |
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IMG_I2S_IN_CTL_ACTIVE_CHAN_MASK; |
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chan_control_mask = IMG_I2S_IN_CH_CTL_16PACK_MASK | |
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IMG_I2S_IN_CH_CTL_FEN_MASK | |
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IMG_I2S_IN_CH_CTL_FMODE_MASK | |
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IMG_I2S_IN_CH_CTL_SW_MASK | |
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IMG_I2S_IN_CH_CTL_FW_MASK | |
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IMG_I2S_IN_CH_CTL_PACKH_MASK; |
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reg = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); |
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reg = (reg & ~control_mask) | control_set; |
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img_i2s_in_writel(i2s, reg, IMG_I2S_IN_CTL); |
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for (i = 0; i < i2s->active_channels; i++) |
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img_i2s_in_ch_disable(i2s, i); |
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for (i = 0; i < i2s->max_i2s_chan; i++) { |
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reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); |
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reg = (reg & ~chan_control_mask) | chan_control_set; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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} |
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i2s->active_channels = i2s_channels; |
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img_i2s_in_flush(i2s); |
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for (i = 0; i < i2s->active_channels; i++) |
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img_i2s_in_ch_enable(i2s, i); |
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return 0; |
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} |
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static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
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{ |
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struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); |
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int i, ret; |
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u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0; |
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u32 reg; |
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
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case SND_SOC_DAIFMT_NB_NF: |
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lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK; |
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break; |
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case SND_SOC_DAIFMT_NB_IF: |
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break; |
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case SND_SOC_DAIFMT_IB_NF: |
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lrd_set |= IMG_I2S_IN_CH_CTL_LRD_MASK; |
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blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK; |
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break; |
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case SND_SOC_DAIFMT_IB_IF: |
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blkp_set |= IMG_I2S_IN_CH_CTL_BLKP_MASK; |
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break; |
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default: |
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return -EINVAL; |
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} |
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_I2S: |
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chan_control_set |= IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; |
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break; |
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case SND_SOC_DAIFMT_LEFT_J: |
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break; |
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default: |
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return -EINVAL; |
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} |
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
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case SND_SOC_DAIFMT_CBM_CFM: |
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break; |
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default: |
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return -EINVAL; |
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} |
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chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; |
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ret = pm_runtime_get_sync(i2s->dev); |
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if (ret < 0) { |
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pm_runtime_put_noidle(i2s->dev); |
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return ret; |
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} |
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for (i = 0; i < i2s->active_channels; i++) |
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img_i2s_in_ch_disable(i2s, i); |
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/* |
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* BLKP and LRD must be set during separate register writes |
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*/ |
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for (i = 0; i < i2s->max_i2s_chan; i++) { |
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reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); |
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reg = (reg & ~chan_control_mask) | chan_control_set; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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reg = (reg & ~IMG_I2S_IN_CH_CTL_BLKP_MASK) | blkp_set; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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reg = (reg & ~IMG_I2S_IN_CH_CTL_LRD_MASK) | lrd_set; |
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img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
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} |
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for (i = 0; i < i2s->active_channels; i++) |
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img_i2s_in_ch_enable(i2s, i); |
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pm_runtime_put(i2s->dev); |
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return 0; |
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} |
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static const struct snd_soc_dai_ops img_i2s_in_dai_ops = { |
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.trigger = img_i2s_in_trigger, |
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.hw_params = img_i2s_in_hw_params, |
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.set_fmt = img_i2s_in_set_fmt |
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}; |
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static int img_i2s_in_dai_probe(struct snd_soc_dai *dai) |
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{ |
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struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); |
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snd_soc_dai_init_dma_data(dai, NULL, &i2s->dma_data); |
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return 0; |
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} |
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static const struct snd_soc_component_driver img_i2s_in_component = { |
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.name = "img-i2s-in" |
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}; |
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static int img_i2s_in_dma_prepare_slave_config(struct snd_pcm_substream *st, |
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struct snd_pcm_hw_params *params, struct dma_slave_config *sc) |
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{ |
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unsigned int i2s_channels = params_channels(params) / 2; |
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struct snd_soc_pcm_runtime *rtd = st->private_data; |
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struct snd_dmaengine_dai_dma_data *dma_data; |
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int ret; |
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dma_data = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), st); |
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ret = snd_hwparams_to_dma_slave_config(st, params, sc); |
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if (ret) |
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return ret; |
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sc->src_addr = dma_data->addr; |
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sc->src_addr_width = dma_data->addr_width; |
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sc->src_maxburst = 4 * i2s_channels; |
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return 0; |
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} |
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static const struct snd_dmaengine_pcm_config img_i2s_in_dma_config = { |
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.prepare_slave_config = img_i2s_in_dma_prepare_slave_config |
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}; |
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static int img_i2s_in_probe(struct platform_device *pdev) |
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{ |
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struct img_i2s_in *i2s; |
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struct resource *res; |
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void __iomem *base; |
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int ret, i; |
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struct reset_control *rst; |
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unsigned int max_i2s_chan_pow_2; |
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struct device *dev = &pdev->dev; |
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i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); |
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if (!i2s) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, i2s); |
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i2s->dev = dev; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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base = devm_ioremap_resource(dev, res); |
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if (IS_ERR(base)) |
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return PTR_ERR(base); |
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i2s->base = base; |
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if (of_property_read_u32(pdev->dev.of_node, "img,i2s-channels", |
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&i2s->max_i2s_chan)) { |
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dev_err(dev, "No img,i2s-channels property\n"); |
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return -EINVAL; |
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} |
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max_i2s_chan_pow_2 = 1 << get_count_order(i2s->max_i2s_chan); |
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i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20); |
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i2s->clk_sys = devm_clk_get(dev, "sys"); |
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if (IS_ERR(i2s->clk_sys)) { |
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if (PTR_ERR(i2s->clk_sys) != -EPROBE_DEFER) |
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dev_err(dev, "Failed to acquire clock 'sys'\n"); |
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return PTR_ERR(i2s->clk_sys); |
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} |
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pm_runtime_enable(&pdev->dev); |
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if (!pm_runtime_enabled(&pdev->dev)) { |
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ret = img_i2s_in_runtime_resume(&pdev->dev); |
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if (ret) |
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goto err_pm_disable; |
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} |
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ret = pm_runtime_get_sync(&pdev->dev); |
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if (ret < 0) |
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goto err_suspend; |
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i2s->active_channels = 1; |
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i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO; |
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i2s->dma_data.addr_width = 4; |
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i2s->dai_driver.probe = img_i2s_in_dai_probe; |
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i2s->dai_driver.capture.channels_min = 2; |
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i2s->dai_driver.capture.channels_max = i2s->max_i2s_chan * 2; |
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i2s->dai_driver.capture.rates = SNDRV_PCM_RATE_8000_192000; |
|
i2s->dai_driver.capture.formats = SNDRV_PCM_FMTBIT_S32_LE | |
|
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE; |
|
i2s->dai_driver.ops = &img_i2s_in_dai_ops; |
|
|
|
rst = devm_reset_control_get_exclusive(dev, "rst"); |
|
if (IS_ERR(rst)) { |
|
if (PTR_ERR(rst) == -EPROBE_DEFER) { |
|
ret = -EPROBE_DEFER; |
|
pm_runtime_put(&pdev->dev); |
|
goto err_suspend; |
|
} |
|
|
|
dev_dbg(dev, "No top level reset found\n"); |
|
|
|
img_i2s_in_disable(i2s); |
|
|
|
for (i = 0; i < i2s->max_i2s_chan; i++) |
|
img_i2s_in_ch_disable(i2s, i); |
|
} else { |
|
reset_control_assert(rst); |
|
reset_control_deassert(rst); |
|
} |
|
|
|
img_i2s_in_writel(i2s, 0, IMG_I2S_IN_CTL); |
|
|
|
for (i = 0; i < i2s->max_i2s_chan; i++) |
|
img_i2s_in_ch_writel(i2s, i, |
|
(4 << IMG_I2S_IN_CH_CTL_CCDEL_SHIFT) | |
|
IMG_I2S_IN_CH_CTL_JUST_MASK | |
|
IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL); |
|
|
|
pm_runtime_put(&pdev->dev); |
|
|
|
i2s->suspend_ch_ctl = devm_kcalloc(dev, |
|
i2s->max_i2s_chan, sizeof(*i2s->suspend_ch_ctl), GFP_KERNEL); |
|
if (!i2s->suspend_ch_ctl) { |
|
ret = -ENOMEM; |
|
goto err_suspend; |
|
} |
|
|
|
ret = devm_snd_soc_register_component(dev, &img_i2s_in_component, |
|
&i2s->dai_driver, 1); |
|
if (ret) |
|
goto err_suspend; |
|
|
|
ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0); |
|
if (ret) |
|
goto err_suspend; |
|
|
|
return 0; |
|
|
|
err_suspend: |
|
if (!pm_runtime_enabled(&pdev->dev)) |
|
img_i2s_in_runtime_suspend(&pdev->dev); |
|
err_pm_disable: |
|
pm_runtime_disable(&pdev->dev); |
|
|
|
return ret; |
|
} |
|
|
|
static int img_i2s_in_dev_remove(struct platform_device *pdev) |
|
{ |
|
pm_runtime_disable(&pdev->dev); |
|
if (!pm_runtime_status_suspended(&pdev->dev)) |
|
img_i2s_in_runtime_suspend(&pdev->dev); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int img_i2s_in_suspend(struct device *dev) |
|
{ |
|
struct img_i2s_in *i2s = dev_get_drvdata(dev); |
|
int i, ret; |
|
u32 reg; |
|
|
|
if (pm_runtime_status_suspended(dev)) { |
|
ret = img_i2s_in_runtime_resume(dev); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
for (i = 0; i < i2s->max_i2s_chan; i++) { |
|
reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); |
|
i2s->suspend_ch_ctl[i] = reg; |
|
} |
|
|
|
i2s->suspend_ctl = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); |
|
|
|
img_i2s_in_runtime_suspend(dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int img_i2s_in_resume(struct device *dev) |
|
{ |
|
struct img_i2s_in *i2s = dev_get_drvdata(dev); |
|
int i, ret; |
|
u32 reg; |
|
|
|
ret = img_i2s_in_runtime_resume(dev); |
|
if (ret) |
|
return ret; |
|
|
|
for (i = 0; i < i2s->max_i2s_chan; i++) { |
|
reg = i2s->suspend_ch_ctl[i]; |
|
img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); |
|
} |
|
|
|
img_i2s_in_writel(i2s, i2s->suspend_ctl, IMG_I2S_IN_CTL); |
|
|
|
if (pm_runtime_status_suspended(dev)) |
|
img_i2s_in_runtime_suspend(dev); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static const struct of_device_id img_i2s_in_of_match[] = { |
|
{ .compatible = "img,i2s-in" }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(of, img_i2s_in_of_match); |
|
|
|
static const struct dev_pm_ops img_i2s_in_pm_ops = { |
|
SET_RUNTIME_PM_OPS(img_i2s_in_runtime_suspend, |
|
img_i2s_in_runtime_resume, NULL) |
|
SET_SYSTEM_SLEEP_PM_OPS(img_i2s_in_suspend, img_i2s_in_resume) |
|
}; |
|
|
|
static struct platform_driver img_i2s_in_driver = { |
|
.driver = { |
|
.name = "img-i2s-in", |
|
.of_match_table = img_i2s_in_of_match, |
|
.pm = &img_i2s_in_pm_ops |
|
}, |
|
.probe = img_i2s_in_probe, |
|
.remove = img_i2s_in_dev_remove |
|
}; |
|
module_platform_driver(img_i2s_in_driver); |
|
|
|
MODULE_AUTHOR("Damien Horsley <[email protected]>"); |
|
MODULE_DESCRIPTION("IMG I2S Input Driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|