// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Mediatek IR Receiver Controller * * Copyright (C) 2017 Sean Wang <[email protected]> */ #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/io.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/reset.h> #include <media/rc-core.h> #define MTK_IR_DEV … /* Register to enable PWM and IR */ #define MTK_CONFIG_HIGH_REG … /* Bit to enable IR pulse width detection */ #define MTK_PWM_EN … /* * Register to setting ok count whose unit based on hardware sampling period * indicating IR receiving completion and then making IRQ fires */ #define MTK_OK_COUNT_MASK … #define MTK_OK_COUNT(x) … /* Bit to enable IR hardware function */ #define MTK_IR_EN … /* Bit to restart IR receiving */ #define MTK_IRCLR … /* Fields containing pulse width data */ #define MTK_WIDTH_MASK … /* IR threshold */ #define MTK_IRTHD … #define MTK_DG_CNT_MASK … #define MTK_DG_CNT(x) … /* Bit to enable interrupt */ #define MTK_IRINT_EN … /* Bit to clear interrupt status */ #define MTK_IRINT_CLR … /* Maximum count of samples */ #define MTK_MAX_SAMPLES … /* Indicate the end of IR message */ #define MTK_IR_END(v, p) … /* Number of registers to record the pulse width */ #define MTK_CHKDATA_SZ … /* Sample period in us */ #define MTK_IR_SAMPLE … enum mtk_fields { … }; enum mtk_regs { … }; static const u32 mt7623_regs[] = …; static const u32 mt7622_regs[] = …; struct mtk_field_type { … }; /* * struct mtk_ir_data - This is the structure holding all differences among various hardwares * @regs: The pointer to the array holding registers offset * @fields: The pointer to the array holding fields location * @div: The internal divisor for the based reference clock * @ok_count: The count indicating the completion of IR data * receiving when count is reached * @hw_period: The value indicating the hardware sampling period */ struct mtk_ir_data { … }; static const struct mtk_field_type mt7623_fields[] = …; static const struct mtk_field_type mt7622_fields[] = …; /* * struct mtk_ir - This is the main datasructure for holding the state * of the driver * @dev: The device pointer * @rc: The rc instrance * @base: The mapped register i/o base * @irq: The IRQ that we are using * @clk: The clock that IR internal is using * @bus: The clock that software decoder is using * @data: Holding specific data for vaious platform */ struct mtk_ir { … }; static inline u32 mtk_chkdata_reg(struct mtk_ir *ir, u32 i) { … } static inline u32 mtk_chk_period(struct mtk_ir *ir) { … } static void mtk_w32_mask(struct mtk_ir *ir, u32 val, u32 mask, unsigned int reg) { … } static void mtk_w32(struct mtk_ir *ir, u32 val, unsigned int reg) { … } static u32 mtk_r32(struct mtk_ir *ir, unsigned int reg) { … } static inline void mtk_irq_disable(struct mtk_ir *ir, u32 mask) { … } static inline void mtk_irq_enable(struct mtk_ir *ir, u32 mask) { … } static irqreturn_t mtk_ir_irq(int irqno, void *dev_id) { … } static const struct mtk_ir_data mt7623_data = …; static const struct mtk_ir_data mt7622_data = …; static const struct of_device_id mtk_ir_match[] = …; MODULE_DEVICE_TABLE(of, mtk_ir_match); static int mtk_ir_probe(struct platform_device *pdev) { … } static void mtk_ir_remove(struct platform_device *pdev) { … } static struct platform_driver mtk_ir_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux