// SPDX-License-Identifier: GPL-2.0-only
/*
 * OMAP16xx specific gpio init
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
 *
 * Author:
 *      Charulatha V <charu@ti.com>
 */

#include <linux/platform_data/gpio-omap.h>
#include <linux/soc/ti/omap1-io.h>

#include "hardware.h"
#include "irqs.h"
#include "soc.h"

#define OMAP1610_GPIO1_BASE             0xfffbe400
#define OMAP1610_GPIO2_BASE             0xfffbec00
#define OMAP1610_GPIO3_BASE             0xfffbb400
#define OMAP1610_GPIO4_BASE             0xfffbbc00
#define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE

/* smart idle, enable wakeup */
#define SYSCONFIG_WORD                  0x14

/* mpu gpio */
static struct resource omap16xx_mpu_gpio_resources[] = {
        {
                .start  = OMAP1_MPUIO_VBASE,
                .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
                .flags  = IORESOURCE_MEM,
        },
        {
                .start  = INT_MPUIO,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct omap_gpio_reg_offs omap16xx_mpuio_regs = {
        .revision       = USHRT_MAX,
        .direction      = OMAP_MPUIO_IO_CNTL,
        .datain         = OMAP_MPUIO_INPUT_LATCH,
        .dataout        = OMAP_MPUIO_OUTPUT,
        .irqstatus      = OMAP_MPUIO_GPIO_INT,
        .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
        .irqenable_inv  = true,
        .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
};

static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = {
        .is_mpuio               = true,
        .bank_width             = 16,
        .bank_stride            = 1,
        .regs                   = &omap16xx_mpuio_regs,
};

static struct platform_device omap16xx_mpu_gpio = {
        .name           = "omap_gpio",
        .id             = 0,
        .dev            = {
                .platform_data = &omap16xx_mpu_gpio_config,
        },
        .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
        .resource = omap16xx_mpu_gpio_resources,
};

/* gpio1 */
static struct resource omap16xx_gpio1_resources[] = {
        {
                .start  = OMAP1610_GPIO1_BASE,
                .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
                .flags  = IORESOURCE_MEM,
        },
        {
                .start  = INT_GPIO_BANK1,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct omap_gpio_reg_offs omap16xx_gpio_regs = {
        .revision       = OMAP1610_GPIO_REVISION,
        .direction      = OMAP1610_GPIO_DIRECTION,
        .set_dataout    = OMAP1610_GPIO_SET_DATAOUT,
        .clr_dataout    = OMAP1610_GPIO_CLEAR_DATAOUT,
        .datain         = OMAP1610_GPIO_DATAIN,
        .dataout        = OMAP1610_GPIO_DATAOUT,
        .irqstatus      = OMAP1610_GPIO_IRQSTATUS1,
        .irqenable      = OMAP1610_GPIO_IRQENABLE1,
        .set_irqenable  = OMAP1610_GPIO_SET_IRQENABLE1,
        .clr_irqenable  = OMAP1610_GPIO_CLEAR_IRQENABLE1,
        .wkup_en        = OMAP1610_GPIO_WAKEUPENABLE,
        .edgectrl1      = OMAP1610_GPIO_EDGE_CTRL1,
        .edgectrl2      = OMAP1610_GPIO_EDGE_CTRL2,
};

static struct omap_gpio_platform_data omap16xx_gpio1_config = {
        .bank_width             = 16,
        .regs                   = &omap16xx_gpio_regs,
};

static struct platform_device omap16xx_gpio1 = {
        .name           = "omap_gpio",
        .id             = 1,
        .dev            = {
                .platform_data = &omap16xx_gpio1_config,
        },
        .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
        .resource = omap16xx_gpio1_resources,
};

/* gpio2 */
static struct resource omap16xx_gpio2_resources[] = {
        {
                .start  = OMAP1610_GPIO2_BASE,
                .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
                .flags  = IORESOURCE_MEM,
        },
        {
                .start  = INT_1610_GPIO_BANK2,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct omap_gpio_platform_data omap16xx_gpio2_config = {
        .bank_width             = 16,
        .regs                   = &omap16xx_gpio_regs,
};

static struct platform_device omap16xx_gpio2 = {
        .name           = "omap_gpio",
        .id             = 2,
        .dev            = {
                .platform_data = &omap16xx_gpio2_config,
        },
        .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
        .resource = omap16xx_gpio2_resources,
};

/* gpio3 */
static struct resource omap16xx_gpio3_resources[] = {
        {
                .start  = OMAP1610_GPIO3_BASE,
                .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
                .flags  = IORESOURCE_MEM,
        },
        {
                .start  = INT_1610_GPIO_BANK3,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct omap_gpio_platform_data omap16xx_gpio3_config = {
        .bank_width             = 16,
        .regs                   = &omap16xx_gpio_regs,
};

static struct platform_device omap16xx_gpio3 = {
        .name           = "omap_gpio",
        .id             = 3,
        .dev            = {
                .platform_data = &omap16xx_gpio3_config,
        },
        .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
        .resource = omap16xx_gpio3_resources,
};

/* gpio4 */
static struct resource omap16xx_gpio4_resources[] = {
        {
                .start  = OMAP1610_GPIO4_BASE,
                .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
                .flags  = IORESOURCE_MEM,
        },
        {
                .start  = INT_1610_GPIO_BANK4,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct omap_gpio_platform_data omap16xx_gpio4_config = {
        .bank_width             = 16,
        .regs                   = &omap16xx_gpio_regs,
};

static struct platform_device omap16xx_gpio4 = {
        .name           = "omap_gpio",
        .id             = 4,
        .dev            = {
                .platform_data = &omap16xx_gpio4_config,
        },
        .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
        .resource = omap16xx_gpio4_resources,
};

static struct platform_device *omap16xx_gpio_dev[] __initdata = {
        &omap16xx_mpu_gpio,
        &omap16xx_gpio1,
        &omap16xx_gpio2,
        &omap16xx_gpio3,
        &omap16xx_gpio4,
};

/*
 * omap16xx_gpio_init needs to be done before
 * machine_init functions access gpio APIs.
 * Hence omap16xx_gpio_init is a postcore_initcall.
 */
static int __init omap16xx_gpio_init(void)
{
        int i;
        void __iomem *base;
        struct resource *res;
        struct platform_device *pdev;
        struct omap_gpio_platform_data *pdata;

        if (!cpu_is_omap16xx())
                return -EINVAL;

        /*
         * Enable system clock for GPIO module.
         * The CAM_CLK_CTRL *is* really the right place.
         */
        omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04,
                                        ULPD_CAM_CLK_CTRL);

        for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) {
                pdev = omap16xx_gpio_dev[i];
                pdata = pdev->dev.platform_data;

                res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
                if (unlikely(!res)) {
                        dev_err(&pdev->dev, "Invalid mem resource.\n");
                        return -ENODEV;
                }

                base = ioremap(res->start, resource_size(res));
                if (unlikely(!base)) {
                        dev_err(&pdev->dev, "ioremap failed.\n");
                        return -ENOMEM;
                }

                __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG);
                iounmap(base);

                platform_device_register(omap16xx_gpio_dev[i]);
        }

        return 0;
}
postcore_initcall(omap16xx_gpio_init);