From 67d1aed0a5de49dfbc81315610a4fd49c864ec45 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Tue, 20 Jan 2015 15:43:17 +0800 Subject: ASoC: atmel_ssc_dai: remove clock pin comments As the clock can be get from TK/RK pin, so remove the comments. Signed-off-by: Bo Shen Signed-off-by: Mark Brown --- sound/soc/atmel/atmel_ssc_dai.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'sound/soc/atmel/atmel_ssc_dai.c') diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index e691aab60761..3cd70597d109 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -450,13 +450,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, break; case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM: - /* - * I2S format, CODEC supplies BCLK and LRC clocks. - * - * The SSC transmit clock is obtained from the BCLK signal on - * on the TK line, and the SSC receive clock is - * generated from the transmit clock. - */ + /* I2S format, CODEC supplies BCLK and LRC clocks. */ rcmr = SSC_BF(RCMR_PERIOD, 0) | SSC_BF(RCMR_STTDLY, START_DELAY) | SSC_BF(RCMR_START, SSC_START_FALLING_RF) @@ -535,10 +529,6 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, /* * DSP/PCM Mode A format, CODEC supplies BCLK and LRC clocks. * - * The SSC transmit clock is obtained from the BCLK signal on - * on the TK line, and the SSC receive clock is - * generated from the transmit clock. - * * Data is transferred on first BCLK after LRC pulse rising * edge.If stereo, the right channel data is contiguous with * the left channel data. -- cgit v1.2.3-59-g8ed1b From eb5271497f212f9e2323adc0a2fd8a9358e751e4 Mon Sep 17 00:00:00 2001 From: Peter Rosin Date: Thu, 29 Jan 2015 11:16:29 +0100 Subject: ASoC: atmel_ssc_dai: Support SND_SOC_DAIFMT_CBM_CFS on I2S Signed-off-by: Peter Rosin Acked-by: Bo Shen Signed-off-by: Mark Brown --- sound/soc/atmel/atmel_ssc_dai.c | 48 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'sound/soc/atmel/atmel_ssc_dai.c') diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index 3cd70597d109..f55f3aab8bdd 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -485,6 +485,54 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, | SSC_BF(TFMR_DATLEN, (bits - 1)); break; + case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFS: + /* I2S format, CODEC supplies BCLK, SSC supplies LRCLK. */ + if (bits > 16 && !ssc->pdata->has_fslen_ext) { + dev_err(dai->dev, + "sample size %d is too large for SSC device\n", + bits); + return -EINVAL; + } + + fslen_ext = (bits - 1) / 16; + fslen = (bits - 1) % 16; + + rcmr = SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period) + | SSC_BF(RCMR_STTDLY, START_DELAY) + | SSC_BF(RCMR_START, SSC_START_FALLING_RF) + | SSC_BF(RCMR_CKI, SSC_CKI_RISING) + | SSC_BF(RCMR_CKO, SSC_CKO_NONE) + | SSC_BF(RCMR_CKS, ssc->clk_from_rk_pin ? + SSC_CKS_PIN : SSC_CKS_CLOCK); + + rfmr = SSC_BF(RFMR_FSLEN_EXT, fslen_ext) + | SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) + | SSC_BF(RFMR_FSOS, SSC_FSOS_NEGATIVE) + | SSC_BF(RFMR_FSLEN, fslen) + | SSC_BF(RFMR_DATNB, (channels - 1)) + | SSC_BIT(RFMR_MSBF) + | SSC_BF(RFMR_LOOP, 0) + | SSC_BF(RFMR_DATLEN, (bits - 1)); + + tcmr = SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period) + | SSC_BF(TCMR_STTDLY, START_DELAY) + | SSC_BF(TCMR_START, SSC_START_FALLING_RF) + | SSC_BF(TCMR_CKI, SSC_CKI_FALLING) + | SSC_BF(TCMR_CKO, SSC_CKO_NONE) + | SSC_BF(TCMR_CKS, ssc->clk_from_rk_pin ? + SSC_CKS_CLOCK : SSC_CKS_PIN); + + tfmr = SSC_BF(TFMR_FSLEN_EXT, fslen_ext) + | SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_NEGATIVE) + | SSC_BF(TFMR_FSDEN, 0) + | SSC_BF(TFMR_FSOS, SSC_FSOS_NEGATIVE) + | SSC_BF(TFMR_FSLEN, fslen) + | SSC_BF(TFMR_DATNB, (channels - 1)) + | SSC_BIT(TFMR_MSBF) + | SSC_BF(TFMR_DATDEF, 0) + | SSC_BF(TFMR_DATLEN, (bits - 1)); + break; + case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS: /* * DSP/PCM Mode A format, SSC provides BCLK and LRC clocks. -- cgit v1.2.3-59-g8ed1b From cbaadf0f90d6d406a36bb389fbdea524d6d89d8d Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 30 Jan 2015 17:38:43 +0800 Subject: ASoC: atmel_ssc_dai: refactor the startup and shutdown In startup function, enable ssc clock and in shutdown function, disable clock. And also remove disable ssc in shutdown function, as ssc is disabled in prepare function. Signed-off-by: Bo Shen Signed-off-by: Mark Brown --- sound/soc/atmel/atmel_ssc_dai.c | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) (limited to 'sound/soc/atmel/atmel_ssc_dai.c') diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index f55f3aab8bdd..76a9754370e8 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -204,6 +204,13 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream, pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n", ssc_readl(ssc_p->ssc->regs, SR)); + /* Enable PMC peripheral clock for this SSC */ + pr_debug("atmel_ssc_dai: Starting clock\n"); + clk_enable(ssc_p->ssc->clk); + + /* Reset the SSC to keep it at a clean status */ + ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST)); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { dir = 0; dir_mask = SSC_DIR_MASK_PLAYBACK; @@ -250,11 +257,6 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, dma_params = ssc_p->dma_params[dir]; if (dma_params != NULL) { - ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable); - pr_debug("atmel_ssc_shutdown: %s disabled SSC_SR=0x%08x\n", - (dir ? "receive" : "transmit"), - ssc_readl(ssc_p->ssc->regs, SR)); - dma_params->ssc = NULL; dma_params->substream = NULL; ssc_p->dma_params[dir] = NULL; @@ -266,10 +268,6 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, ssc_p->dir_mask &= ~dir_mask; if (!ssc_p->dir_mask) { if (ssc_p->initialized) { - /* Shutdown the SSC clock. */ - pr_debug("atmel_ssc_dai: Stopping clock\n"); - clk_disable(ssc_p->ssc->clk); - free_irq(ssc_p->ssc->irq, ssc_p); ssc_p->initialized = 0; } @@ -280,6 +278,10 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream, ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0; } spin_unlock_irq(&ssc_p->lock); + + /* Shutdown the SSC clock. */ + pr_debug("atmel_ssc_dai: Stopping clock\n"); + clk_disable(ssc_p->ssc->clk); } @@ -625,14 +627,6 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, rcmr, rfmr, tcmr, tfmr); if (!ssc_p->initialized) { - - /* Enable PMC peripheral clock for this SSC */ - pr_debug("atmel_ssc_dai: Starting clock\n"); - clk_enable(ssc_p->ssc->clk); - - /* Reset the SSC and its PDC registers */ - ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST)); - ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); -- cgit v1.2.3-59-g8ed1b From 3fd5b30c577bdd51168f38cf4f2d322619015a53 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 30 Jan 2015 17:38:44 +0800 Subject: ASoC: atmel_ssc_dai: only clean PDC when using PDC Only using PDC, it needs to clean PDC registers. Signed-off-by: Bo Shen Signed-off-by: Mark Brown --- sound/soc/atmel/atmel_ssc_dai.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'sound/soc/atmel/atmel_ssc_dai.c') diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index 76a9754370e8..379ac2a6ab16 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -627,15 +627,17 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, rcmr, rfmr, tcmr, tfmr); if (!ssc_p->initialized) { - ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0); - - ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + if (!ssc_p->ssc->pdata->use_dma) { + ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0); + + ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + } ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0, ssc_p->name, ssc_p); -- cgit v1.2.3-59-g8ed1b