// SPDX-License-Identifier: GPL-2.0 // // ALSA SoC Audio Layer - S3C PCM-Controller driver // // Copyright (c) 2009 Samsung Electronics Co. Ltd // Author: Jaswinder Singh <[email protected]> // based upon I2S drivers by Ben Dooks. #include <linux/clk.h> #include <linux/io.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <sound/soc.h> #include <sound/pcm_params.h> #include <linux/platform_data/asoc-s3c.h> #include "dma.h" #include "pcm.h" /*Register Offsets */ #define S3C_PCM_CTL … #define S3C_PCM_CLKCTL … #define S3C_PCM_TXFIFO … #define S3C_PCM_RXFIFO … #define S3C_PCM_IRQCTL … #define S3C_PCM_IRQSTAT … #define S3C_PCM_FIFOSTAT … #define S3C_PCM_CLRINT … /* PCM_CTL Bit-Fields */ #define S3C_PCM_CTL_TXDIPSTICK_MASK … #define S3C_PCM_CTL_TXDIPSTICK_SHIFT … #define S3C_PCM_CTL_RXDIPSTICK_MASK … #define S3C_PCM_CTL_RXDIPSTICK_SHIFT … #define S3C_PCM_CTL_TXDMA_EN … #define S3C_PCM_CTL_RXDMA_EN … #define S3C_PCM_CTL_TXMSB_AFTER_FSYNC … #define S3C_PCM_CTL_RXMSB_AFTER_FSYNC … #define S3C_PCM_CTL_TXFIFO_EN … #define S3C_PCM_CTL_RXFIFO_EN … #define S3C_PCM_CTL_ENABLE … /* PCM_CLKCTL Bit-Fields */ #define S3C_PCM_CLKCTL_SERCLK_EN … #define S3C_PCM_CLKCTL_SERCLKSEL_PCLK … #define S3C_PCM_CLKCTL_SCLKDIV_MASK … #define S3C_PCM_CLKCTL_SYNCDIV_MASK … #define S3C_PCM_CLKCTL_SCLKDIV_SHIFT … #define S3C_PCM_CLKCTL_SYNCDIV_SHIFT … /* PCM_TXFIFO Bit-Fields */ #define S3C_PCM_TXFIFO_DVALID … #define S3C_PCM_TXFIFO_DATA_MSK … /* PCM_RXFIFO Bit-Fields */ #define S3C_PCM_RXFIFO_DVALID … #define S3C_PCM_RXFIFO_DATA_MSK … /* PCM_IRQCTL Bit-Fields */ #define S3C_PCM_IRQCTL_IRQEN … #define S3C_PCM_IRQCTL_WRDEN … #define S3C_PCM_IRQCTL_TXEMPTYEN … #define S3C_PCM_IRQCTL_TXALMSTEMPTYEN … #define S3C_PCM_IRQCTL_TXFULLEN … #define S3C_PCM_IRQCTL_TXALMSTFULLEN … #define S3C_PCM_IRQCTL_TXSTARVEN … #define S3C_PCM_IRQCTL_TXERROVRFLEN … #define S3C_PCM_IRQCTL_RXEMPTEN … #define S3C_PCM_IRQCTL_RXALMSTEMPTEN … #define S3C_PCM_IRQCTL_RXFULLEN … #define S3C_PCM_IRQCTL_RXALMSTFULLEN … #define S3C_PCM_IRQCTL_RXSTARVEN … #define S3C_PCM_IRQCTL_RXERROVRFLEN … /* PCM_IRQSTAT Bit-Fields */ #define S3C_PCM_IRQSTAT_IRQPND … #define S3C_PCM_IRQSTAT_WRD_XFER … #define S3C_PCM_IRQSTAT_TXEMPTY … #define S3C_PCM_IRQSTAT_TXALMSTEMPTY … #define S3C_PCM_IRQSTAT_TXFULL … #define S3C_PCM_IRQSTAT_TXALMSTFULL … #define S3C_PCM_IRQSTAT_TXSTARV … #define S3C_PCM_IRQSTAT_TXERROVRFL … #define S3C_PCM_IRQSTAT_RXEMPT … #define S3C_PCM_IRQSTAT_RXALMSTEMPT … #define S3C_PCM_IRQSTAT_RXFULL … #define S3C_PCM_IRQSTAT_RXALMSTFULL … #define S3C_PCM_IRQSTAT_RXSTARV … #define S3C_PCM_IRQSTAT_RXERROVRFL … /* PCM_FIFOSTAT Bit-Fields */ #define S3C_PCM_FIFOSTAT_TXCNT_MSK … #define S3C_PCM_FIFOSTAT_TXFIFOEMPTY … #define S3C_PCM_FIFOSTAT_TXFIFOALMSTEMPTY … #define S3C_PCM_FIFOSTAT_TXFIFOFULL … #define S3C_PCM_FIFOSTAT_TXFIFOALMSTFULL … #define S3C_PCM_FIFOSTAT_RXCNT_MSK … #define S3C_PCM_FIFOSTAT_RXFIFOEMPTY … #define S3C_PCM_FIFOSTAT_RXFIFOALMSTEMPTY … #define S3C_PCM_FIFOSTAT_RXFIFOFULL … #define S3C_PCM_FIFOSTAT_RXFIFOALMSTFULL … /** * struct s3c_pcm_info - S3C PCM Controller information * @lock: Spin lock * @dev: The parent device passed to use from the probe. * @regs: The pointer to the device register block. * @sclk_per_fs: number of sclk per frame sync * @idleclk: Whether to keep PCMSCLK enabled even when idle (no active xfer) * @pclk: the PCLK_PCM (pcm) clock pointer * @cclk: the SCLK_AUDIO (audio-bus) clock pointer * @dma_playback: DMA information for playback channel. * @dma_capture: DMA information for capture channel. */ struct s3c_pcm_info { … }; static struct snd_dmaengine_dai_dma_data s3c_pcm_stereo_out[] = …; static struct snd_dmaengine_dai_dma_data s3c_pcm_stereo_in[] = …; static struct s3c_pcm_info s3c_pcm[2]; static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on) { … } static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on) { … } static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static int s3c_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *socdai) { … } static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai, int div_id, int div) { … } static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { … } static int s3c_pcm_dai_probe(struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops s3c_pcm_dai_ops = …; #define S3C_PCM_RATES … #define S3C_PCM_DAI_DECLARE … static struct snd_soc_dai_driver s3c_pcm_dai[] = …; static const struct snd_soc_component_driver s3c_pcm_component = …; static int s3c_pcm_dev_probe(struct platform_device *pdev) { … } static void s3c_pcm_dev_remove(struct platform_device *pdev) { … } static struct platform_driver s3c_pcm_driver = …; module_platform_driver(…) …; /* Module information */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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