// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * MTX-1 platform devices registration (Au1500)
 *
 * Copyright (C) 2007-2009, Florian Fainelli <florian@openwrt.org>
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/property.h>
#include <linux/input.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <mtd/mtd-abi.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/setup.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/gpio-au1000.h>
#include <asm/mach-au1x00/au1xxx_eth.h>
#include <prom.h>

const char *get_system_type(void)
{
        return "MTX-1";
}

void prom_putchar(char c)
{
        alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}

static void mtx1_reset(char *c)
{
        /* Jump to the reset vector */
        __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
}

static void mtx1_power_off(void)
{
        while (1)
                asm volatile (
                "       .set    mips32                                  \n"
                "       wait                                            \n"
                "       .set    mips0                                   \n");
}

void __init board_setup(void)
{
#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
        /* Enable USB power switch */
        alchemy_gpio_direction_output(204, 0);
#endif /* IS_ENABLED(CONFIG_USB_OHCI_HCD) */

        /* Initialize sys_pinfunc */
        alchemy_wrsys(SYS_PF_NI2, AU1000_SYS_PINFUNC);

        /* Initialize GPIO */
        alchemy_wrsys(~0, AU1000_SYS_TRIOUTCLR);
        alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
        alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
        alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
        alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */

        /* Enable LED and set it to green */
        alchemy_gpio_direction_output(211, 1);  /* green on */
        alchemy_gpio_direction_output(212, 0);  /* red off */

        pm_power_off = mtx1_power_off;
        _machine_halt = mtx1_power_off;
        _machine_restart = mtx1_reset;

        printk(KERN_INFO "4G Systems MTX-1 Board\n");
}

/******************************************************************************/

static const struct software_node mtx1_gpiochip_node = {
        .name = "alchemy-gpio2",
};

static const struct software_node mtx1_gpio_keys_node = {
        .name = "mtx1-gpio-keys",
};

static const struct property_entry mtx1_button_props[] = {
        PROPERTY_ENTRY_U32("linux,code", BTN_0),
        PROPERTY_ENTRY_GPIO("gpios", &mtx1_gpiochip_node, 7, GPIO_ACTIVE_HIGH),
        PROPERTY_ENTRY_STRING("label", "System button"),
        { }
};

static const struct software_node mtx1_button_node = {
        .parent = &mtx1_gpio_keys_node,
        .properties = mtx1_button_props,
};

static const struct software_node *mtx1_gpio_keys_swnodes[] __initconst = {
        &mtx1_gpio_keys_node,
        &mtx1_button_node,
        NULL
};

static void __init mtx1_keys_init(void)
{
        struct platform_device_info keys_info = {
                .name   = "gpio-keys",
                .id     = PLATFORM_DEVID_NONE,
        };
        struct platform_device *pd;
        int err;

        err = software_node_register_node_group(mtx1_gpio_keys_swnodes);
        if (err) {
                pr_err("failed to register gpio-keys software nodes: %d\n", err);
                return;
        }

        keys_info.fwnode = software_node_fwnode(&mtx1_gpio_keys_node);

        pd = platform_device_register_full(&keys_info);
        err = PTR_ERR_OR_ZERO(pd);
        if (err)
                pr_err("failed to create gpio-keys device: %d\n", err);
}

/* Global number 215 is offset 15 on Alchemy GPIO 2 */
static const struct property_entry mtx1_wdt_props[] = {
        PROPERTY_ENTRY_GPIO("gpios", &mtx1_gpiochip_node, 15, GPIO_ACTIVE_HIGH),
        { }
};

static struct platform_device_info mtx1_wdt_info __initconst = {
        .name = "mtx1-wdt",
        .id = 0,
        .properties = mtx1_wdt_props,
};

static void __init mtx1_wdt_init(void)
{
        struct platform_device *pd;
        int err;

        pd = platform_device_register_full(&mtx1_wdt_info);
        err = PTR_ERR_OR_ZERO(pd);
        if (err)
                pr_err("failed to create gpio-keys device: %d\n", err);
}

static const struct software_node mtx1_gpio_leds_node = {
        .name = "mtx1-leds",
};

static const struct property_entry mtx1_green_led_props[] = {
        PROPERTY_ENTRY_GPIO("gpios", &mtx1_gpiochip_node, 11, GPIO_ACTIVE_HIGH),
        { }
};

static const struct software_node mtx1_green_led_node = {
        .name = "mtx1:green",
        .parent = &mtx1_gpio_leds_node,
        .properties = mtx1_green_led_props,
};

static const struct property_entry mtx1_red_led_props[] = {
        PROPERTY_ENTRY_GPIO("gpios", &mtx1_gpiochip_node, 12, GPIO_ACTIVE_HIGH),
        { }
};

static const struct software_node mtx1_red_led_node = {
        .name = "mtx1:red",
        .parent = &mtx1_gpio_leds_node,
        .properties = mtx1_red_led_props,
};

static const struct software_node *mtx1_gpio_leds_swnodes[] = {
        &mtx1_gpio_leds_node,
        &mtx1_green_led_node,
        &mtx1_red_led_node,
        NULL
};

static void __init mtx1_leds_init(void)
{
        struct platform_device_info led_info = {
                .name   = "leds-gpio",
                .id     = PLATFORM_DEVID_NONE,
        };
        struct platform_device *led_dev;
        int err;

        err = software_node_register_node_group(mtx1_gpio_leds_swnodes);
        if (err) {
                pr_err("failed to register LED software nodes: %d\n", err);
                return;
        }

        led_info.fwnode = software_node_fwnode(&mtx1_gpio_leds_node);

        led_dev = platform_device_register_full(&led_info);
        err = PTR_ERR_OR_ZERO(led_dev);
        if (err)
                pr_err("failed to create LED device: %d\n", err);
}

static struct mtd_partition mtx1_mtd_partitions[] = {
        {
                .name   = "filesystem",
                .size   = 0x01C00000,
                .offset = 0,
        },
        {
                .name   = "yamon",
                .size   = 0x00100000,
                .offset = MTDPART_OFS_APPEND,
                .mask_flags = MTD_WRITEABLE,
        },
        {
                .name   = "kernel",
                .size   = 0x002c0000,
                .offset = MTDPART_OFS_APPEND,
        },
        {
                .name   = "yamon env",
                .size   = 0x00040000,
                .offset = MTDPART_OFS_APPEND,
        },
};

static struct physmap_flash_data mtx1_flash_data = {
        .width          = 4,
        .nr_parts       = 4,
        .parts          = mtx1_mtd_partitions,
};

static struct resource mtx1_mtd_resource = {
        .start  = 0x1e000000,
        .end    = 0x1fffffff,
        .flags  = IORESOURCE_MEM,
};

static struct platform_device mtx1_mtd = {
        .name           = "physmap-flash",
        .dev            = {
                .platform_data  = &mtx1_flash_data,
        },
        .num_resources  = 1,
        .resource       = &mtx1_mtd_resource,
};

static struct resource alchemy_pci_host_res[] = {
        [0] = {
                .start  = AU1500_PCI_PHYS_ADDR,
                .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
                .flags  = IORESOURCE_MEM,
        },
};

static int mtx1_pci_idsel(unsigned int devsel, int assert)
{
        /* This function is only necessary to support a proprietary Cardbus
         * adapter on the mtx-1 "singleboard" variant. It triggers a custom
         * logic chip connected to EXT_IO3 (GPIO1) to suppress IDSEL signals.
         */
        udelay(1);

        if (assert && devsel != 0)
                /* Suppress signal to Cardbus */
                alchemy_gpio_set_value(1, 0);   /* set EXT_IO3 OFF */
        else
                alchemy_gpio_set_value(1, 1);   /* set EXT_IO3 ON */

        udelay(1);
        return 1;
}

static const char mtx1_irqtab[][5] = {
        [0] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 00 - AdapterA-Slot0 (top) */
        [1] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 01 - AdapterA-Slot1 (bottom) */
        [2] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 02 - AdapterB-Slot0 (top) */
        [3] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 03 - AdapterB-Slot1 (bottom) */
        [4] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTB, 0xff, 0xff }, /* IDSEL 04 - AdapterC-Slot0 (top) */
        [5] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 05 - AdapterC-Slot1 (bottom) */
        [6] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 06 - AdapterD-Slot0 (top) */
        [7] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 07 - AdapterD-Slot1 (bottom) */
};

static int mtx1_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
        return mtx1_irqtab[slot][pin];
}

static struct alchemy_pci_platdata mtx1_pci_pd = {
        .board_map_irq   = mtx1_map_pci_irq,
        .board_pci_idsel = mtx1_pci_idsel,
        .pci_cfg_set     = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
                           PCI_CONFIG_CH |
#if defined(__MIPSEB__)
                           PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
#else
                           0,
#endif
};

static struct platform_device mtx1_pci_host = {
        .dev.platform_data = &mtx1_pci_pd,
        .name           = "alchemy-pci",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
        .resource       = alchemy_pci_host_res,
};

static struct platform_device *mtx1_devs[] __initdata = {
        &mtx1_pci_host,
        &mtx1_mtd,
};

static struct au1000_eth_platform_data mtx1_au1000_eth0_pdata = {
        .phy_search_highest_addr        = 1,
        .phy1_search_mac0               = 1,
};

static int __init mtx1_register_devices(void)
{
        int rc;

        irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
        irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);

        au1xxx_override_eth_cfg(0, &mtx1_au1000_eth0_pdata);

        rc = software_node_register(&mtx1_gpiochip_node);
        if (rc)
                return rc;

        rc = platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
        if (rc)
                return rc;

        mtx1_leds_init();
        mtx1_wdt_init();
        mtx1_keys_init();

        return 0;
}
arch_initcall(mtx1_register_devices);