From 5be6155b50bbf7083b4bfa219e4ce6d1491f42f0 Mon Sep 17 00:00:00 2001 From: Shengjiu Wang Date: Thu, 11 Jul 2019 18:49:45 +0800 Subject: [PATCH] ASoC: fsl_esai: Wrap some operations to be functions Extract the operation to be functions, to improve the readability. In this patch, fsl_esai_hw_init, fsl_esai_register_restore, fsl_esai_trigger_start and fsl_esai_trigger_stop are extracted. Signed-off-by: Shengjiu Wang Acked-by: Nicolin Chen Link: https://lore.kernel.org/r/804d7e75ae7e06a913479912b578b3538ca7cd3f.1562842206.git.shengjiu.wang@nxp.com Signed-off-by: Mark Brown --- sound/soc/fsl/fsl_esai.c | 188 ++++++++++++++++++++++++--------------- 1 file changed, 117 insertions(+), 71 deletions(-) diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index 10d2210c91ef..ab460d6d7432 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -35,6 +35,7 @@ * @fifo_depth: depth of tx/rx FIFO * @slot_width: width of each DAI slot * @slots: number of slots + * @channels: channel num for tx or rx * @hck_rate: clock rate of desired HCKx clock * @sck_rate: clock rate of desired SCKx clock * @hck_dir: the direction of HCKx pads @@ -57,6 +58,7 @@ struct fsl_esai { u32 slots; u32 tx_mask; u32 rx_mask; + u32 channels[2]; u32 hck_rate[2]; u32 sck_rate[2]; bool hck_dir[2]; @@ -543,64 +545,132 @@ static int fsl_esai_hw_params(struct snd_pcm_substream *substream, return 0; } +static int fsl_esai_hw_init(struct fsl_esai *esai_priv) +{ + struct platform_device *pdev = esai_priv->pdev; + int ret; + + /* Reset ESAI unit */ + ret = regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR, + ESAI_ECR_ESAIEN_MASK | ESAI_ECR_ERST_MASK, + ESAI_ECR_ESAIEN | ESAI_ECR_ERST); + if (ret) { + dev_err(&pdev->dev, "failed to reset ESAI: %d\n", ret); + return ret; + } + + /* + * We need to enable ESAI so as to access some of its registers. + * Otherwise, we would fail to dump regmap from user space. + */ + ret = regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR, + ESAI_ECR_ESAIEN_MASK | ESAI_ECR_ERST_MASK, + ESAI_ECR_ESAIEN); + if (ret) { + dev_err(&pdev->dev, "failed to enable ESAI: %d\n", ret); + return ret; + } + + regmap_update_bits(esai_priv->regmap, REG_ESAI_PRRC, + ESAI_PRRC_PDC_MASK, 0); + regmap_update_bits(esai_priv->regmap, REG_ESAI_PCRC, + ESAI_PCRC_PC_MASK, 0); + + return 0; +} + +static int fsl_esai_register_restore(struct fsl_esai *esai_priv) +{ + int ret; + + /* FIFO reset for safety */ + regmap_update_bits(esai_priv->regmap, REG_ESAI_TFCR, + ESAI_xFCR_xFR, ESAI_xFCR_xFR); + regmap_update_bits(esai_priv->regmap, REG_ESAI_RFCR, + ESAI_xFCR_xFR, ESAI_xFCR_xFR); + + regcache_mark_dirty(esai_priv->regmap); + ret = regcache_sync(esai_priv->regmap); + if (ret) + return ret; + + /* FIFO reset done */ + regmap_update_bits(esai_priv->regmap, REG_ESAI_TFCR, ESAI_xFCR_xFR, 0); + regmap_update_bits(esai_priv->regmap, REG_ESAI_RFCR, ESAI_xFCR_xFR, 0); + + return 0; +} + +static void fsl_esai_trigger_start(struct fsl_esai *esai_priv, bool tx) +{ + u8 i, channels = esai_priv->channels[tx]; + u32 pins = DIV_ROUND_UP(channels, esai_priv->slots); + u32 mask; + + regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), + ESAI_xFCR_xFEN_MASK, ESAI_xFCR_xFEN); + + /* Write initial words reqiured by ESAI as normal procedure */ + for (i = 0; tx && i < channels; i++) + regmap_write(esai_priv->regmap, REG_ESAI_ETDR, 0x0); + + /* + * When set the TE/RE in the end of enablement flow, there + * will be channel swap issue for multi data line case. + * In order to workaround this issue, we switch the bit + * enablement sequence to below sequence + * 1) clear the xSMB & xSMA: which is done in probe and + * stop state. + * 2) set TE/RE + * 3) set xSMB + * 4) set xSMA: xSMA is the last one in this flow, which + * will trigger esai to start. + */ + regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), + tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, + tx ? ESAI_xCR_TE(pins) : ESAI_xCR_RE(pins)); + mask = tx ? esai_priv->tx_mask : esai_priv->rx_mask; + + regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx), + ESAI_xSMB_xS_MASK, ESAI_xSMB_xS(mask)); + regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx), + ESAI_xSMA_xS_MASK, ESAI_xSMA_xS(mask)); +} + +static void fsl_esai_trigger_stop(struct fsl_esai *esai_priv, bool tx) +{ + regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), + tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, 0); + regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx), + ESAI_xSMA_xS_MASK, 0); + regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx), + ESAI_xSMB_xS_MASK, 0); + + /* Disable and reset FIFO */ + regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), + ESAI_xFCR_xFR | ESAI_xFCR_xFEN, ESAI_xFCR_xFR); + regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), + ESAI_xFCR_xFR, 0); +} + static int fsl_esai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai); bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; - u8 i, channels = substream->runtime->channels; - u32 pins = DIV_ROUND_UP(channels, esai_priv->slots); - u32 mask; + + esai_priv->channels[tx] = substream->runtime->channels; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), - ESAI_xFCR_xFEN_MASK, ESAI_xFCR_xFEN); - - /* Write initial words reqiured by ESAI as normal procedure */ - for (i = 0; tx && i < channels; i++) - regmap_write(esai_priv->regmap, REG_ESAI_ETDR, 0x0); - - /* - * When set the TE/RE in the end of enablement flow, there - * will be channel swap issue for multi data line case. - * In order to workaround this issue, we switch the bit - * enablement sequence to below sequence - * 1) clear the xSMB & xSMA: which is done in probe and - * stop state. - * 2) set TE/RE - * 3) set xSMB - * 4) set xSMA: xSMA is the last one in this flow, which - * will trigger esai to start. - */ - regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), - tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, - tx ? ESAI_xCR_TE(pins) : ESAI_xCR_RE(pins)); - mask = tx ? esai_priv->tx_mask : esai_priv->rx_mask; - - regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx), - ESAI_xSMB_xS_MASK, ESAI_xSMB_xS(mask)); - regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx), - ESAI_xSMA_xS_MASK, ESAI_xSMA_xS(mask)); - + fsl_esai_trigger_start(esai_priv, tx); break; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), - tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, 0); - regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx), - ESAI_xSMA_xS_MASK, 0); - regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx), - ESAI_xSMB_xS_MASK, 0); - - /* Disable and reset FIFO */ - regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), - ESAI_xFCR_xFR | ESAI_xFCR_xFEN, ESAI_xFCR_xFR); - regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), - ESAI_xFCR_xFR, 0); + fsl_esai_trigger_stop(esai_priv, tx); break; default: return -EINVAL; @@ -866,22 +936,9 @@ static int fsl_esai_probe(struct platform_device *pdev) dev_set_drvdata(&pdev->dev, esai_priv); - /* Reset ESAI unit */ - ret = regmap_write(esai_priv->regmap, REG_ESAI_ECR, ESAI_ECR_ERST); - if (ret) { - dev_err(&pdev->dev, "failed to reset ESAI: %d\n", ret); - return ret; - } - - /* - * We need to enable ESAI so as to access some of its registers. - * Otherwise, we would fail to dump regmap from user space. - */ - ret = regmap_write(esai_priv->regmap, REG_ESAI_ECR, ESAI_ECR_ESAIEN); - if (ret) { - dev_err(&pdev->dev, "failed to enable ESAI: %d\n", ret); + ret = fsl_esai_hw_init(esai_priv); + if (ret) return ret; - } esai_priv->tx_mask = 0xFFFFFFFF; esai_priv->rx_mask = 0xFFFFFFFF; @@ -955,20 +1012,10 @@ static int fsl_esai_runtime_resume(struct device *dev) regcache_cache_only(esai->regmap, false); - /* FIFO reset for safety */ - regmap_update_bits(esai->regmap, REG_ESAI_TFCR, - ESAI_xFCR_xFR, ESAI_xFCR_xFR); - regmap_update_bits(esai->regmap, REG_ESAI_RFCR, - ESAI_xFCR_xFR, ESAI_xFCR_xFR); - - ret = regcache_sync(esai->regmap); + ret = fsl_esai_register_restore(esai); if (ret) goto err_regcache_sync; - /* FIFO reset done */ - regmap_update_bits(esai->regmap, REG_ESAI_TFCR, ESAI_xFCR_xFR, 0); - regmap_update_bits(esai->regmap, REG_ESAI_RFCR, ESAI_xFCR_xFR, 0); - return 0; err_regcache_sync: @@ -991,7 +1038,6 @@ static int fsl_esai_runtime_suspend(struct device *dev) struct fsl_esai *esai = dev_get_drvdata(dev); regcache_cache_only(esai->regmap, true); - regcache_mark_dirty(esai->regmap); if (!IS_ERR(esai->fsysclk)) clk_disable_unprepare(esai->fsysclk); -- 2.30.2