diff options
Diffstat (limited to 'sound/soc/fsl/fsl_ssi.c')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi.c | 78 |
1 files changed, 48 insertions, 30 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 1a2fa7f18142..d8b9c6547142 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -203,12 +203,10 @@ struct fsl_ssi_soc_data { }; /** - * fsl_ssi: per-SSI private data - * + * struct fsl_ssi - per-SSI private data * @regs: Pointer to the regmap registers * @irq: IRQ of this SSI * @cpu_dai_drv: CPU DAI driver for this device - * * @dai_fmt: DAI configuration this device is currently used with * @streams: Mask of current active streams: BIT(TX) and BIT(RX) * @i2s_net: I2S and Network mode configurations of SCR register @@ -221,38 +219,29 @@ struct fsl_ssi_soc_data { * @slot_width: Width of each DAI slot * @slots: Number of slots * @regvals: Specific RX/TX register settings - * * @clk: Clock source to access register * @baudclk: Clock source to generate bit and frame-sync clocks * @baudclk_streams: Active streams that are using baudclk - * * @regcache_sfcsr: Cache sfcsr register value during suspend and resume * @regcache_sacnt: Cache sacnt register value during suspend and resume - * * @dma_params_tx: DMA transmit parameters * @dma_params_rx: DMA receive parameters * @ssi_phys: physical address of the SSI registers - * * @fiq_params: FIQ stream filtering parameters - * * @card_pdev: Platform_device pointer to register a sound card for PowerPC or * to register a CODEC platform device for AC97 * @card_name: Platform_device name to register a sound card for PowerPC or * to register a CODEC platform device for AC97 * @card_idx: The index of SSI to register a sound card for PowerPC or * to register a CODEC platform device for AC97 - * * @dbg_stats: Debugging statistics - * * @soc: SoC specific data * @dev: Pointer to &pdev->dev - * * @fifo_watermark: The FIFO watermark setting. Notifies DMA when there are * @fifo_watermark or fewer words in TX fifo or * @fifo_watermark or more empty words in RX fifo. * @dma_maxburst: Max number of words to transfer in one go. So far, * this is always the same as fifo_watermark. - * * @ac97_reg_lock: Mutex lock to serialize AC97 register access operations */ struct fsl_ssi { @@ -374,7 +363,9 @@ static bool fsl_ssi_is_i2s_cbm_cfs(struct fsl_ssi *ssi) } /** - * Interrupt handler to gather states + * fsl_ssi_irq - Interrupt handler to gather states + * @irq: irq number + * @dev_id: context */ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id) { @@ -395,7 +386,10 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id) } /** - * Set SCR, SIER, STCR and SRCR registers with cached values in regvals + * fsl_ssi_config_enable - Set SCR, SIER, STCR and SRCR registers with + * cached values in regvals + * @ssi: SSI context + * @tx: direction * * Notes: * 1) For offline_config SoCs, enable all necessary bits of both streams @@ -474,7 +468,7 @@ enable_scr: ssi->streams |= BIT(dir); } -/** +/* * Exclude bits that are used by the opposite stream * * When both streams are active, disabling some bits for the current stream @@ -495,7 +489,10 @@ enable_scr: ((vals) & _ssi_xor_shared_bits(vals, avals, aactive)) /** - * Unset SCR, SIER, STCR and SRCR registers with cached values in regvals + * fsl_ssi_config_disable - Unset SCR, SIER, STCR and SRCR registers + * with cached values in regvals + * @ssi: SSI context + * @tx: direction * * Notes: * 1) For offline_config SoCs, to avoid online reconfigurations, disable all @@ -577,7 +574,9 @@ static void fsl_ssi_tx_ac97_saccst_setup(struct fsl_ssi *ssi) } /** - * Cache critical bits of SIER, SRCR, STCR and SCR to later set them safely + * fsl_ssi_setup_regvals - Cache critical bits of SIER, SRCR, STCR and + * SCR to later set them safely + * @ssi: SSI context */ static void fsl_ssi_setup_regvals(struct fsl_ssi *ssi) { @@ -630,7 +629,7 @@ static void fsl_ssi_setup_ac97(struct fsl_ssi *ssi) static int fsl_ssi_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); int ret; @@ -654,16 +653,19 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, static void fsl_ssi_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); clk_disable_unprepare(ssi->clk); } /** - * Configure Digital Audio Interface bit clock + * fsl_ssi_set_bclk - Configure Digital Audio Interface bit clock + * @substream: ASoC substream + * @dai: pointer to DAI + * @hw_params: pointers to hw_params * - * Note: This function can be only called when using SSI as DAI master + * Notes: This function can be only called when using SSI as DAI master * * Quick instruction for parameters: * freq: Output BCLK frequency = samplerate * slots * slot_width @@ -782,7 +784,10 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, } /** - * Configure SSI based on PCM hardware parameters + * fsl_ssi_hw_params - Configure SSI based on PCM hardware parameters + * @substream: ASoC substream + * @hw_params: pointers to hw_params + * @dai: pointer to DAI * * Notes: * 1) SxCCR.WL bits are critical bits that require SSI to be temporarily @@ -858,7 +863,7 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, static int fsl_ssi_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); if (fsl_ssi_is_i2s_master(ssi) && @@ -997,7 +1002,9 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi *ssi, unsigned int fmt) } /** - * Configure Digital Audio Interface (DAI) Format + * fsl_ssi_set_dai_fmt - Configure Digital Audio Interface (DAI) Format + * @dai: pointer to DAI + * @fmt: format mask */ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) { @@ -1011,7 +1018,12 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) } /** - * Set TDM slot number and slot width + * fsl_ssi_set_dai_tdm_slot - Set TDM slot number and slot width + * @dai: pointer to DAI + * @tx_mask: mask for TX + * @rx_mask: mask for RX + * @slots: number of slots + * @slot_width: number of bits per slot */ static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, u32 rx_mask, int slots, int slot_width) @@ -1055,7 +1067,10 @@ static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, } /** - * Start or stop SSI and corresponding DMA transaction. + * fsl_ssi_trigger - Start or stop SSI and corresponding DMA transaction. + * @substream: ASoC substream + * @cmd: trigger command + * @dai: pointer to DAI * * The DMA channel is in external master start and pause mode, which * means the SSI completely controls the flow of data. @@ -1063,7 +1078,7 @@ static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; @@ -1239,7 +1254,8 @@ static struct snd_ac97_bus_ops fsl_ssi_ac97_ops = { }; /** - * Initialize SSI registers + * fsl_ssi_hw_init - Initialize SSI registers + * @ssi: SSI context */ static int fsl_ssi_hw_init(struct fsl_ssi *ssi) { @@ -1268,7 +1284,8 @@ static int fsl_ssi_hw_init(struct fsl_ssi *ssi) } /** - * Clear SSI registers + * fsl_ssi_hw_clean - Clear SSI registers + * @ssi: SSI context */ static void fsl_ssi_hw_clean(struct fsl_ssi *ssi) { @@ -1285,7 +1302,8 @@ static void fsl_ssi_hw_clean(struct fsl_ssi *ssi) regmap_update_bits(ssi->regs, REG_SSI_SCR, SSI_SCR_SSIEN, 0); } } -/** + +/* * Make every character in a string lower-case */ static void make_lowercase(char *s) |