uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * (C) Copyright 2015 Marek Vasut <marex@denx.de>

 *

 * DesignWare APB GPIO driver

 */

​

#include <common.h>

#include <malloc.h>

#include <asm/arch/gpio.h>

#include <asm/gpio.h>

#include <asm/io.h>

#include <dm.h>

#include <dm/device-internal.h>

#include <dm/lists.h>

#include <dm/root.h>

#include <errno.h>

#include <reset.h>

​

#define GPIO_SWPORT_DR(p)   (0x00 + (p) * 0xc)

#define GPIO_SWPORT_DDR(p)  (0x04 + (p) * 0xc)

#define GPIO_INTEN      0x30

#define GPIO_INTMASK        0x34

#define GPIO_INTTYPE_LEVEL  0x38

#define GPIO_INT_POLARITY   0x3c

#define GPIO_INTSTATUS      0x40

#define GPIO_PORTA_DEBOUNCE 0x48

#define GPIO_PORTA_EOI      0x4c

#define GPIO_EXT_PORT(p)    (0x50 + (p) * 4)

​

struct gpio_dwapb_priv {

    struct reset_ctl_bulk   resets;

};

​

struct gpio_dwapb_platdata {

    const char  *name;

    int     bank;

    int     pins;

    fdt_addr_t  base;

};

​

static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin)

{

    struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);

​

    clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);

    return 0;

}

​

static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin,

                     int val)

{

    struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);

​

    setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);

​

    if (val)

        setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);

    else

        clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);

​

    return 0;

}

​

static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin)

{

    struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);

    return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin));

}

​

​

static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val)

{

    struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);

​

    if (val)

        setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);

    else

        clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);

​

    return 0;

}

​

static int dwapb_gpio_get_function(struct udevice *dev, unsigned offset)

{

    struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);

    u32 gpio;

​

    gpio = readl(plat->base + GPIO_SWPORT_DDR(plat->bank));

​

    if (gpio & BIT(offset))

        return GPIOF_OUTPUT;