linux-imx

/*

 * Copyright (C) 2017 Sanechips Technology Co., Ltd.

 * Copyright 2017 Linaro Ltd.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/device.h>

#include <linux/err.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

​

#include <media/rc-core.h>

​

#define DRIVER_NAME     "zx-irdec"

​

#define ZX_IR_ENABLE        0x04

#define ZX_IREN         BIT(0)

#define ZX_IR_CTRL      0x08

#define ZX_DEGL_MASK        GENMASK(21, 20)

#define ZX_DEGL_VALUE(x)    (((x) << 20) & ZX_DEGL_MASK)

#define ZX_WDBEGIN_MASK     GENMASK(18, 8)

#define ZX_WDBEGIN_VALUE(x) (((x) << 8) & ZX_WDBEGIN_MASK)

#define ZX_IR_INTEN     0x10

#define ZX_IR_INTSTCLR      0x14

#define ZX_IR_CODE      0x30

#define ZX_IR_CNUM      0x34

#define ZX_NECRPT       BIT(16)

​

struct zx_irdec {

    void __iomem *base;

    struct rc_dev *rcd;

};

​

static void zx_irdec_set_mask(struct zx_irdec *irdec, unsigned int reg,

                  u32 mask, u32 value)

{

    u32 data;

​

    data = readl(irdec->base + reg);

    data &= ~mask;

    data |= value & mask;

    writel(data, irdec->base + reg);

}

​

static irqreturn_t zx_irdec_irq(int irq, void *dev_id)

{

    struct zx_irdec *irdec = dev_id;

    u8 address, not_address;

    u8 command, not_command;

    u32 rawcode, scancode;

    enum rc_proto rc_proto;

​

    /* Clear interrupt */

    writel(1, irdec->base + ZX_IR_INTSTCLR);

​

    /* Check repeat frame */

    if (readl(irdec->base + ZX_IR_CNUM) & ZX_NECRPT) {