// SPDX-License-Identifier: GPL-2.0-only /* * STM32 ALSA SoC Digital Audio Interface (SAI) driver. * * Copyright (C) 2016, STMicroelectronics - All Rights Reserved * Author(s): Olivier Moysan <[email protected]> for STMicroelectronics. */ #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <sound/asoundef.h> #include <sound/core.h> #include <sound/dmaengine_pcm.h> #include <sound/pcm_params.h> #include "stm32_sai.h" #define SAI_FREE_PROTOCOL … #define SAI_SPDIF_PROTOCOL … #define SAI_SLOT_SIZE_AUTO … #define SAI_SLOT_SIZE_16 … #define SAI_SLOT_SIZE_32 … #define SAI_DATASIZE_8 … #define SAI_DATASIZE_10 … #define SAI_DATASIZE_16 … #define SAI_DATASIZE_20 … #define SAI_DATASIZE_24 … #define SAI_DATASIZE_32 … #define STM_SAI_DAI_NAME_SIZE … #define STM_SAI_IS_PLAYBACK(ip) … #define STM_SAI_IS_CAPTURE(ip) … #define STM_SAI_A_ID … #define STM_SAI_B_ID … #define STM_SAI_IS_SUB_A(x) … #define SAI_SYNC_NONE … #define SAI_SYNC_INTERNAL … #define SAI_SYNC_EXTERNAL … #define STM_SAI_PROTOCOL_IS_SPDIF(ip) … #define STM_SAI_HAS_SPDIF(x) … #define STM_SAI_HAS_PDM(x) … #define STM_SAI_HAS_EXT_SYNC(x) … #define SAI_IEC60958_BLOCK_FRAMES … #define SAI_IEC60958_STATUS_BYTES … #define SAI_MCLK_NAME_LEN … #define SAI_RATE_11K … /** * struct stm32_sai_sub_data - private data of SAI sub block (block A or B) * @pdev: device data pointer * @regmap: SAI register map pointer * @regmap_config: SAI sub block register map configuration pointer * @dma_params: dma configuration data for rx or tx channel * @cpu_dai_drv: DAI driver data pointer * @cpu_dai: DAI runtime data pointer * @substream: PCM substream data pointer * @pdata: SAI block parent data pointer * @np_sync_provider: synchronization provider node * @sai_ck: kernel clock feeding the SAI clock generator * @sai_mclk: master clock from SAI mclk provider * @phys_addr: SAI registers physical base address * @mclk_rate: SAI block master clock frequency (Hz). set at init * @id: SAI sub block id corresponding to sub-block A or B * @dir: SAI block direction (playback or capture). set at init * @master: SAI block mode flag. (true=master, false=slave) set at init * @spdif: SAI S/PDIF iec60958 mode flag. set at init * @fmt: SAI block format. relevant only for custom protocols. set at init * @sync: SAI block synchronization mode. (none, internal or external) * @synco: SAI block ext sync source (provider setting). (none, sub-block A/B) * @synci: SAI block ext sync source (client setting). (SAI sync provider index) * @fs_length: frame synchronization length. depends on protocol settings * @slots: rx or tx slot number * @slot_width: rx or tx slot width in bits * @slot_mask: rx or tx active slots mask. set at init or at runtime * @data_size: PCM data width. corresponds to PCM substream width. * @spdif_frm_cnt: S/PDIF playback frame counter * @iec958: iec958 data * @ctrl_lock: control lock * @irq_lock: prevent race condition with IRQ */ struct stm32_sai_sub_data { … }; enum stm32_sai_fifo_th { … }; static bool stm32_sai_sub_readable_reg(struct device *dev, unsigned int reg) { … } static bool stm32_sai_sub_volatile_reg(struct device *dev, unsigned int reg) { … } static bool stm32_sai_sub_writeable_reg(struct device *dev, unsigned int reg) { … } static int stm32_sai_sub_reg_up(struct stm32_sai_sub_data *sai, unsigned int reg, unsigned int mask, unsigned int val) { … } static int stm32_sai_sub_reg_wr(struct stm32_sai_sub_data *sai, unsigned int reg, unsigned int mask, unsigned int val) { … } static int stm32_sai_sub_reg_rd(struct stm32_sai_sub_data *sai, unsigned int reg, unsigned int *val) { … } static const struct regmap_config stm32_sai_sub_regmap_config_f4 = …; static const struct regmap_config stm32_sai_sub_regmap_config_h7 = …; static int snd_pcm_iec958_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int snd_pcm_iec958_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uctl) { … } static int snd_pcm_iec958_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uctl) { … } static const struct snd_kcontrol_new iec958_ctls = …; struct stm32_sai_mclk_data { … }; #define to_mclk_data(_hw) … #define STM32_SAI_MAX_CLKS … static int stm32_sai_get_clk_div(struct stm32_sai_sub_data *sai, unsigned long input_rate, unsigned long output_rate) { … } static int stm32_sai_set_clk_div(struct stm32_sai_sub_data *sai, unsigned int div) { … } static int stm32_sai_set_parent_clock(struct stm32_sai_sub_data *sai, unsigned int rate) { … } static long stm32_sai_mclk_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { … } static unsigned long stm32_sai_mclk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static int stm32_sai_mclk_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { … } static int stm32_sai_mclk_enable(struct clk_hw *hw) { … } static void stm32_sai_mclk_disable(struct clk_hw *hw) { … } static const struct clk_ops mclk_ops = …; static int stm32_sai_add_mclk_provider(struct stm32_sai_sub_data *sai) { … } static irqreturn_t stm32_sai_isr(int irq, void *devid) { … } static int stm32_sai_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id, unsigned int freq, int dir) { … } static int stm32_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, u32 rx_mask, int slots, int slot_width) { … } static int stm32_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) { … } static int stm32_sai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static int stm32_sai_set_config(struct snd_soc_dai *cpu_dai, struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { … } static int stm32_sai_set_slots(struct snd_soc_dai *cpu_dai) { … } static void stm32_sai_set_frame(struct snd_soc_dai *cpu_dai) { … } static void stm32_sai_init_iec958_status(struct stm32_sai_sub_data *sai) { … } static void stm32_sai_set_iec958_status(struct stm32_sai_sub_data *sai, struct snd_pcm_runtime *runtime) { … } static int stm32_sai_configure_clock(struct snd_soc_dai *cpu_dai, struct snd_pcm_hw_params *params) { … } static int stm32_sai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) { … } static int stm32_sai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *cpu_dai) { … } static void stm32_sai_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { … } static int stm32_sai_pcm_new(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *cpu_dai) { … } static int stm32_sai_dai_probe(struct snd_soc_dai *cpu_dai) { … } static const struct snd_soc_dai_ops stm32_sai_pcm_dai_ops = …; static const struct snd_soc_dai_ops stm32_sai_pcm_dai_ops2 = …; static int stm32_sai_pcm_process_spdif(struct snd_pcm_substream *substream, int channel, unsigned long hwoff, unsigned long bytes) { … } /* No support of mmap in S/PDIF mode */ static const struct snd_pcm_hardware stm32_sai_pcm_hw_spdif = …; static const struct snd_pcm_hardware stm32_sai_pcm_hw = …; static struct snd_soc_dai_driver stm32_sai_playback_dai = …; static struct snd_soc_dai_driver stm32_sai_capture_dai = …; static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config = …; static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config_spdif = …; static const struct snd_soc_component_driver stm32_component = …; static const struct of_device_id stm32_sai_sub_ids[] = …; MODULE_DEVICE_TABLE(of, stm32_sai_sub_ids); static int stm32_sai_sub_parse_of(struct platform_device *pdev, struct stm32_sai_sub_data *sai) { … } static int stm32_sai_sub_probe(struct platform_device *pdev) { … } static void stm32_sai_sub_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int stm32_sai_sub_suspend(struct device *dev) { … } static int stm32_sai_sub_resume(struct device *dev) { … } #endif /* CONFIG_PM_SLEEP */ static const struct dev_pm_ops stm32_sai_sub_pm_ops = …; static struct platform_driver stm32_sai_sub_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_ALIAS(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux