// SPDX-License-Identifier: GPL-2.0
/*
 * ALPHAPROJECT AP-SH4A-3A Support.
 *
 * Copyright (C) 2010 ALPHAPROJECT Co.,Ltd.
 * Copyright (C) 2008  Yoshihiro Shimoda
 * Copyright (C) 2009  Paul Mundt
 */
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/mtd/physmap.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <linux/smsc911x.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <asm/machvec.h>
#include <linux/sizes.h>
#include <asm/clock.h>

static struct mtd_partition nor_flash_partitions[] = {
        {
                .name           = "loader",
                .offset         = 0x00000000,
                .size           = 512 * 1024,
        },
        {
                .name           = "bootenv",
                .offset         = MTDPART_OFS_APPEND,
                .size           = 512 * 1024,
        },
        {
                .name           = "kernel",
                .offset         = MTDPART_OFS_APPEND,
                .size           = 4 * 1024 * 1024,
        },
        {
                .name           = "data",
                .offset         = MTDPART_OFS_APPEND,
                .size           = MTDPART_SIZ_FULL,
        },
};

static struct physmap_flash_data nor_flash_data = {
        .width          = 4,
        .parts          = nor_flash_partitions,
        .nr_parts       = ARRAY_SIZE(nor_flash_partitions),
};

static struct resource nor_flash_resources[] = {
        [0]     = {
                .start  = 0x00000000,
                .end    = 0x01000000 - 1,
                .flags  = IORESOURCE_MEM,
        }
};

static struct platform_device nor_flash_device = {
        .name           = "physmap-flash",
        .dev            = {
                .platform_data  = &nor_flash_data,
        },
        .num_resources  = ARRAY_SIZE(nor_flash_resources),
        .resource       = nor_flash_resources,
};

/* Dummy supplies, where voltage doesn't matter */
static struct regulator_consumer_supply dummy_supplies[] = {
        REGULATOR_SUPPLY("vddvario", "smsc911x"),
        REGULATOR_SUPPLY("vdd33a", "smsc911x"),
};

static struct resource smsc911x_resources[] = {
        [0] = {
                .name           = "smsc911x-memory",
                .start          = 0xA4000000,
                .end            = 0xA4000000 + SZ_256 - 1,
                .flags          = IORESOURCE_MEM,
        },
        [1] = {
                .name           = "smsc911x-irq",
                .start          = evt2irq(0x200),
                .end            = evt2irq(0x200),
                .flags          = IORESOURCE_IRQ,
        },
};

static struct smsc911x_platform_config smsc911x_config = {
        .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
        .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
        .flags          = SMSC911X_USE_16BIT,
        .phy_interface  = PHY_INTERFACE_MODE_MII,
};

static struct platform_device smsc911x_device = {
        .name           = "smsc911x",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(smsc911x_resources),
        .resource       = smsc911x_resources,
        .dev = {
                .platform_data = &smsc911x_config,
        },
};

static struct platform_device *apsh4a3a_devices[] __initdata = {
        &nor_flash_device,
        &smsc911x_device,
};

static int __init apsh4a3a_devices_setup(void)
{
        regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));

        return platform_add_devices(apsh4a3a_devices,
                                    ARRAY_SIZE(apsh4a3a_devices));
}
device_initcall(apsh4a3a_devices_setup);

static int apsh4a3a_clk_init(void)
{
        struct clk *clk;
        int ret;

        clk = clk_get(NULL, "extal");
        if (IS_ERR(clk))
                return PTR_ERR(clk);
        ret = clk_set_rate(clk, 33333000);
        clk_put(clk);

        return ret;
}

/* Initialize the board */
static void __init apsh4a3a_setup(char **cmdline_p)
{
        printk(KERN_INFO "Alpha Project AP-SH4A-3A support:\n");
}

static void __init apsh4a3a_init_irq(void)
{
        plat_irq_setup_pins(IRQ_MODE_IRQ7654);
}

/* Return the board specific boot mode pin configuration */
static int apsh4a3a_mode_pins(void)
{
        int value = 0;

        /* These are the factory default settings of SW1 and SW2.
         * If you change these dip switches then you will need to
         * adjust the values below as well.
         */
        value &= ~MODE_PIN0;  /* Clock Mode 16 */
        value &= ~MODE_PIN1;
        value &= ~MODE_PIN2;
        value &= ~MODE_PIN3;
        value |=  MODE_PIN4;
        value &= ~MODE_PIN5;  /* 16-bit Area0 bus width */
        value |=  MODE_PIN6;  /* Area 0 SRAM interface */
        value |=  MODE_PIN7;
        value |=  MODE_PIN8;  /* Little Endian */
        value |=  MODE_PIN9;  /* Master Mode */
        value |=  MODE_PIN10; /* Crystal resonator */
        value |=  MODE_PIN11; /* Display Unit */
        value |=  MODE_PIN12;
        value &= ~MODE_PIN13; /* 29-bit address mode */
        value |=  MODE_PIN14; /* No PLL step-up */

        return value;
}

/*
 * The Machine Vector
 */
static struct sh_machine_vector mv_apsh4a3a __initmv = {
        .mv_name                = "AP-SH4A-3A",
        .mv_setup               = apsh4a3a_setup,
        .mv_clk_init            = apsh4a3a_clk_init,
        .mv_init_irq            = apsh4a3a_init_irq,
        .mv_mode_pins           = apsh4a3a_mode_pins,
};