// SPDX-License-Identifier: GPL-2.0+ // // Freescale ALSA SoC Digital Audio Interface (SAI) driver. // // Copyright 2012-2015 Freescale Semiconductor, Inc. #include <linux/clk.h> #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/module.h> #include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/pm_qos.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/time.h> #include <sound/core.h> #include <sound/dmaengine_pcm.h> #include <sound/pcm_params.h> #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> #include "fsl_sai.h" #include "fsl_utils.h" #include "imx-pcm.h" #define FSL_SAI_FLAGS … static const unsigned int fsl_sai_rates[] = …; static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = …; /** * fsl_sai_dir_is_synced - Check if stream is synced by the opposite stream * * SAI supports synchronous mode using bit/frame clocks of either Transmitter's * or Receiver's for both streams. This function is used to check if clocks of * the stream's are synced by the opposite stream. * * @sai: SAI context * @dir: stream direction */ static inline bool fsl_sai_dir_is_synced(struct fsl_sai *sai, int dir) { … } static struct pinctrl_state *fsl_sai_get_pins_state(struct fsl_sai *sai, u32 bclk) { … } static irqreturn_t fsl_sai_isr(int irq, void *devid) { … } static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, u32 rx_mask, int slots, int slot_width) { … } static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio) { … } static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, bool tx) { … } static int fsl_sai_set_mclk_rate(struct snd_soc_dai *dai, int clk_id, unsigned int freq) { … } static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { … } static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, unsigned int fmt, bool tx) { … } static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int fsl_sai_set_dai_fmt_tx(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int fsl_sai_set_dai_fmt_rx(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) { … } static int fsl_sai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) { … } static int fsl_sai_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static void fsl_sai_config_disable(struct fsl_sai *sai, int dir) { … } static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *cpu_dai) { … } static int fsl_sai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) { … } static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = …; static const struct snd_soc_dai_ops fsl_sai_pcm_dai_tx_ops = …; static const struct snd_soc_dai_ops fsl_sai_pcm_dai_rx_ops = …; static int fsl_sai_dai_resume(struct snd_soc_component *component) { … } static struct snd_soc_dai_driver fsl_sai_dai_template[] = …; static const struct snd_soc_component_driver fsl_component = …; static struct reg_default fsl_sai_reg_defaults_ofs0[] = …; static struct reg_default fsl_sai_reg_defaults_ofs8[] = …; static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) { … } static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) { … } static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg) { … } static struct regmap_config fsl_sai_regmap_config = …; static int fsl_sai_check_version(struct device *dev) { … } /* * Calculate the offset between first two datalines, don't * different offset in one case. */ static unsigned int fsl_sai_calc_dl_off(unsigned long dl_mask) { … } /* * read the fsl,dataline property from dts file. * It has 3 value for each configuration, first one means the type: * I2S(1) or PDM(2), second one is dataline mask for 'rx', third one is * dataline mask for 'tx'. for example * * fsl,dataline = <1 0xff 0xff 2 0xff 0x11>, * * It means I2S type rx mask is 0xff, tx mask is 0xff, PDM type * rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled). * */ static int fsl_sai_read_dlcfg(struct fsl_sai *sai) { … } static int fsl_sai_runtime_suspend(struct device *dev); static int fsl_sai_runtime_resume(struct device *dev); static int fsl_sai_probe(struct platform_device *pdev) { … } static void fsl_sai_remove(struct platform_device *pdev) { … } static const struct fsl_sai_soc_data fsl_sai_vf610_data = …; static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = …; static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8mm_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8mn_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8mp_data = …; static const struct fsl_sai_soc_data fsl_sai_imx8ulp_data = …; static const struct fsl_sai_soc_data fsl_sai_imx93_data = …; static const struct fsl_sai_soc_data fsl_sai_imx95_data = …; static const struct of_device_id fsl_sai_ids[] = …; MODULE_DEVICE_TABLE(of, fsl_sai_ids); static int fsl_sai_runtime_suspend(struct device *dev) { … } static int fsl_sai_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops fsl_sai_pm_ops = …; static struct platform_driver fsl_sai_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_ALIAS(…) …; MODULE_LICENSE(…) …;
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