// SPDX-License-Identifier: GPL-2.0-only
/*
 * arch/arm/mach-iop32x/em7210.c
 *
 * Board support code for the Lanner EM7210 platforms.
 *
 * Based on arch/arm/mach-iop32x/iq31244.c file.
 *
 * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>

#include "hardware.h"
#include "gpio-iop32x.h"
#include "irqs.h"

static void __init em7210_timer_init(void)
{
        /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
        /* 33.333 MHz crystal.                                */
        iop_init_time(200000000);
}

/*
 * EM7210 RTC
 */
static struct i2c_board_info __initdata em7210_i2c_devices[] = {
        {
                I2C_BOARD_INFO("rs5c372a", 0x32),
        },
};

/*
 * EM7210 I/O
 */
static struct map_desc em7210_io_desc[] __initdata = {
        {       /* on-board devices */
                .virtual        = IQ31244_UART,
                .pfn            = __phys_to_pfn(IQ31244_UART),
                .length         = 0x00100000,
                .type           = MT_DEVICE,
        },
};

void __init em7210_map_io(void)
{
        iop3xx_map_io();
        iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
}


/*
 * EM7210 PCI
 */
#define INTA    IRQ_IOP32X_XINT0
#define INTB    IRQ_IOP32X_XINT1
#define INTC    IRQ_IOP32X_XINT2
#define INTD    IRQ_IOP32X_XINT3

static int __init
em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
        static int pci_irq_table[][4] = {
                /*
                 * PCI IDSEL/INTPIN->INTLINE
                 * A       B       C       D
                 */
                {INTB, INTB, INTB, INTB}, /* console / uart */
                {INTA, INTA, INTA, INTA}, /* 1st 82541      */
                {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
                {INTC, INTC, INTC, INTC}, /* GD31244        */
                {INTD, INTA, INTA, INTA}, /* mini-PCI       */
                {INTD, INTC, INTA, INTA}, /* NEC USB        */
        };

        if (pin < 1 || pin > 4)
                return -1;

        return pci_irq_table[slot % 6][pin - 1];
}

static struct hw_pci em7210_pci __initdata = {
        .nr_controllers = 1,
        .ops            = &iop3xx_ops,
        .setup          = iop3xx_pci_setup,
        .preinit        = iop3xx_pci_preinit,
        .map_irq        = em7210_pci_map_irq,
};

static int __init em7210_pci_init(void)
{
        if (machine_is_em7210())
                pci_common_init(&em7210_pci);

        return 0;
}

subsys_initcall(em7210_pci_init);


/*
 * EM7210 Flash
 */
static struct physmap_flash_data em7210_flash_data = {
        .width          = 2,
};

static struct resource em7210_flash_resource = {
        .start          = 0xf0000000,
        .end            = 0xf1ffffff,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device em7210_flash_device = {
        .name           = "physmap-flash",
        .id             = 0,
        .dev            = {
                .platform_data  = &em7210_flash_data,
        },
        .num_resources  = 1,
        .resource       = &em7210_flash_resource,
};


/*
 * EM7210 UART
 * The physical address of the serial port is 0xfe800000,
 * so it can be used for physical and virtual address.
 */
static struct plat_serial8250_port em7210_serial_port[] = {
        {
                .mapbase        = IQ31244_UART,
                .membase        = (char *)IQ31244_UART,
                .irq            = IRQ_IOP32X_XINT1,
                .flags          = UPF_SKIP_TEST,
                .iotype         = UPIO_MEM,
                .regshift       = 0,
                .uartclk        = 1843200,
        },
        { },
};

static struct resource em7210_uart_resource = {
        .start          = IQ31244_UART,
        .end            = IQ31244_UART + 7,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device em7210_serial_device = {
        .name           = "serial8250",
        .id             = PLAT8250_DEV_PLATFORM,
        .dev            = {
                .platform_data          = em7210_serial_port,
        },
        .num_resources  = 1,
        .resource       = &em7210_uart_resource,
};

#define EM7210_HARDWARE_POWER 0

void em7210_power_off(void)
{
        int ret;

        ret = gpio_direction_output(EM7210_HARDWARE_POWER, 1);
        if (ret)
                pr_crit("could not drive power off GPIO high\n");
}

static int __init em7210_request_gpios(void)
{
        int ret;

        if (!machine_is_em7210())
                return 0;

        ret = gpio_request(EM7210_HARDWARE_POWER, "power");
        if (ret) {
                pr_err("could not request power off GPIO\n");
                return 0;
        }

        pm_power_off = em7210_power_off;

        return 0;
}
device_initcall(em7210_request_gpios);

static void __init em7210_init_machine(void)
{
        register_iop32x_gpio();
        platform_device_register(&em7210_serial_device);
        gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
        gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
        platform_device_register(&iop3xx_i2c0_device);
        platform_device_register(&iop3xx_i2c1_device);
        platform_device_register(&em7210_flash_device);
        platform_device_register(&iop3xx_dma_0_channel);
        platform_device_register(&iop3xx_dma_1_channel);

        i2c_register_board_info(0, em7210_i2c_devices,
                ARRAY_SIZE(em7210_i2c_devices));
}

MACHINE_START(EM7210, "Lanner EM7210")
        .atag_offset    = 0x100,
        .nr_irqs        = IOP32X_NR_IRQS,
        .map_io         = em7210_map_io,
        .init_irq       = iop32x_init_irq,
        .init_time      = em7210_timer_init,
        .init_machine   = em7210_init_machine,
        .restart        = iop3xx_restart,
MACHINE_END