malta-platform.c

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/*
 * 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 ([email protected])
 *     written by Ralf Baechle <[email protected]>
 *
 * Copyright (C) 2008 Wind River Systems, Inc.
 *   updated by Tiejun Chen <[email protected]>
 *
 * 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/mc146818rtc.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <asm/mips-boards/maltaint.h>
#include <mtd/mtd-abi.h>

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

struct resource malta_rtc_resources[] = {
    {
        .start  = RTC_PORT(0),
        .end    = RTC_PORT(7),
        .flags  = IORESOURCE_IO,
    }, {
        .start  = RTC_IRQ,
        .end    = RTC_IRQ,
        .flags  = IORESOURCE_IRQ,
    }
};

static struct platform_device malta_rtc_device = {
    .name       = "rtc_cmos",
    .id     = -1,
    .resource   = malta_rtc_resources,
    .num_resources  = ARRAY_SIZE(malta_rtc_resources),
};

static struct mtd_partition malta_mtd_partitions[] = {
    {
        .name =     "YAMON",
        .offset =   0x0,
        .size =     0x100000,
        .mask_flags =   MTD_WRITEABLE
    }, {
        .name =     "User FS",
        .offset =   0x100000,
        .size =     0x2e0000
    }, {
        .name =     "Board Config",
        .offset =   0x3e0000,
        .size =     0x020000,
        .mask_flags =   MTD_WRITEABLE
    }
};

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

static struct resource malta_flash_resource = {
    .start      = 0x1e000000,
    .end        = 0x1e3fffff,
    .flags      = IORESOURCE_MEM
};

static struct platform_device malta_flash_device = {
    .name       = "physmap-flash",
    .id     = 0,
    .dev        = {
        .platform_data  = &malta_flash_data,
    },
    .num_resources  = 1,
    .resource   = &malta_flash_resource,
};

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

static int __init malta_add_devices(void)
{
    int err;

    err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
    if (err)
        return err;

    return 0;
}

device_initcall(malta_add_devices);