/*
 * 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) 2007 Ralf Baechle (ralf@linux-mips.org)
 *
 * Copyright (C) 2009 Lemote, Inc.
 * Author: Yan hua (yanhua@lemote.com)
 * Author: Wu Zhangjin (wuzhangjin@gmail.com)
 */

#include <linux/io.h>
#include <linux/module.h>
#include <linux/serial_8250.h>

#include <asm/bootinfo.h>

#include <loongson.h>
#include <machine.h>

#define PORT(int, clk)                  \
{                                                               \
        .irq            = int,                                  \
        .uartclk        = clk,                                  \
        .iotype         = UPIO_PORT,                            \
        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
        .regshift       = 0,                                    \
}

#define PORT_M(int, clk)                                \
{                                                               \
        .irq            = MIPS_CPU_IRQ_BASE + (int),            \
        .uartclk        = clk,                                  \
        .iotype         = UPIO_MEM,                             \
        .membase        = (void __iomem *)NULL,                 \
        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
        .regshift       = 0,                                    \
}

static struct plat_serial8250_port uart8250_data[MACH_LOONGSON_END + 1] = {
        [MACH_LOONGSON_UNKNOWN] = {},
        [MACH_LEMOTE_FL2E]      = PORT(4, 1843200),
        [MACH_LEMOTE_FL2F]      = PORT(3, 1843200),
        [MACH_LEMOTE_ML2F7]     = PORT_M(3, 3686400),
        [MACH_LEMOTE_YL2F89]    = PORT_M(3, 3686400),
        [MACH_DEXXON_GDIUM2F10] = PORT_M(3, 3686400),
        [MACH_LEMOTE_NAS]       = PORT_M(3, 3686400),
        [MACH_LEMOTE_LL2F]      = PORT(3, 1843200),
        [MACH_LOONGSON_END]     = {},
};

static struct platform_device uart8250_device = {
        .name = "serial8250",
        .id = PLAT8250_DEV_PLATFORM,
};

static int __init serial_init(void)
{
        unsigned char iotype;

        iotype = uart8250_data[mips_machtype].iotype;

        if (UPIO_MEM == iotype) {
                uart8250_data[mips_machtype].mapbase =
                        loongson_uart_base;
                uart8250_data[mips_machtype].membase =
                        (void __iomem *)_loongson_uart_base;
        }
        else if (UPIO_PORT == iotype)
                uart8250_data[mips_machtype].iobase =
                        loongson_uart_base - LOONGSON_PCIIO_BASE;

        memset(&uart8250_data[mips_machtype + 1], 0,
                        sizeof(struct plat_serial8250_port));
        uart8250_device.dev.platform_data = &uart8250_data[mips_machtype];

        return platform_device_register(&uart8250_device);
}
module_init(serial_init);

static void __exit serial_exit(void)
{
        platform_device_unregister(&uart8250_device);
}
module_exit(serial_exit);