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malta-platform.c

/*
 * 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/mc146818rtc.h>
#include <linux/module.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.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 + 2,
            .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;

      /*
       * Set RTC to BCD mode to support current alarm code.
       */
      CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);

      return 0;
}

device_initcall(malta_add_devices);

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