/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2006, 07 MIPS Technologies, Inc.
 *   written by Ralf Baechle (ralf@linux-mips.org)
 *     written by Ralf Baechle <ralf@linux-mips.org>
 *
 * Copyright (C) 2008 Wind River Systems, Inc.
 *   updated by Tiejun Chen <tiejun.chen@windriver.com>
 *
 * 1. Probe driver for the Malta's UART ports:
 *
 *   o 2 ports in the SMC SuperIO
 *   o 1 port in the CBUS UART, a discrete 16550 which normally is only used
 *     for bringups.
 *
 * We don't use 8250_platform.c on Malta as it would result in the CBUS
 * UART becoming ttyS0.
 *
 * 2. Register RTC-CMOS platform device on Malta.
 */
#include <linux/init.h>
#include <linux/serial_8250.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <asm/mips-boards/maltaint.h>

#define SMC_PORT(base, int)                                             \
{                                                                       \
        .iobase         = base,                                         \
        .irq            = int,                                          \
        .uartclk        = 1843200,                                      \
        .iotype         = UPIO_PORT,                                    \
        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |           \
                          UPF_MAGIC_MULTIPLIER,                         \
        .regshift       = 0,                                            \
}

#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)

static struct plat_serial8250_port uart8250_data[] = {
        SMC_PORT(0x3F8, 4),
        SMC_PORT(0x2F8, 3),
        {
                .mapbase        = 0x1f000900,   /* The CBUS UART */
                .irq            = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
                .uartclk        = 3686400,      /* Twice the usual clk! */
                .iotype         = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ?
                                  UPIO_MEM32BE : UPIO_MEM32,
                .flags          = CBUS_UART_FLAGS,
                .regshift       = 3,
        },
        { },
};

static struct platform_device malta_uart8250_device = {
        .name                   = "serial8250",
        .id                     = PLAT8250_DEV_PLATFORM,
        .dev                    = {
                .platform_data  = uart8250_data,
        },
};

static struct platform_device *malta_devices[] __initdata = {
        &malta_uart8250_device,
};

static int __init malta_add_devices(void)
{
        return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
}

device_initcall(malta_add_devices);