linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Driver for Allwinner sunXi IR controller

 *

 * Copyright (C) 2014 Alexsey Shestacov <wingrime@linux-sunxi.org>

 * Copyright (C) 2014 Alexander Bersenev <bay@hackerdom.ru>

 *

 * Based on sun5i-ir.c:

 * Copyright (C) 2007-2012 Daniel Wang

 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>

 */

​

#include <linux/clk.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/reset.h>

#include <media/rc-core.h>

​

#define SUNXI_IR_DEV "sunxi-ir"

​

/* Registers */

/* IR Control */

#define SUNXI_IR_CTL_REG      0x00

/* Global Enable */

#define REG_CTL_GEN         BIT(0)

/* RX block enable */

#define REG_CTL_RXEN            BIT(1)

/* CIR mode */

#define REG_CTL_MD          (BIT(4) | BIT(5))

​

/* Rx Config */

#define SUNXI_IR_RXCTL_REG    0x10

/* Pulse Polarity Invert flag */

#define REG_RXCTL_RPPI          BIT(2)

​

/* Rx Data */

#define SUNXI_IR_RXFIFO_REG   0x20

​

/* Rx Interrupt Enable */

#define SUNXI_IR_RXINT_REG    0x2C

/* Rx FIFO Overflow */

#define REG_RXINT_ROI_EN        BIT(0)

/* Rx Packet End */

#define REG_RXINT_RPEI_EN       BIT(1)

/* Rx FIFO Data Available */

#define REG_RXINT_RAI_EN        BIT(4)

​

/* Rx FIFO available byte level */

#define REG_RXINT_RAL(val)    ((val) << 8)

​

/* Rx Interrupt Status */

#define SUNXI_IR_RXSTA_REG    0x30

/* RX FIFO Get Available Counter */

#define REG_RXSTA_GET_AC(val) (((val) >> 8) & (ir->fifo_size * 2 - 1))

/* Clear all interrupt status value */

#define REG_RXSTA_CLEARALL    0xff

​

/* IR Sample Config */

#define SUNXI_IR_CIR_REG      0x34

/* CIR_REG register noise threshold */

#define REG_CIR_NTHR(val)    (((val) << 2) & (GENMASK(7, 2)))

/* CIR_REG register idle threshold */