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gtwx5715-setup.c

/*
 * arch/arm/mach-ixp4xx/gtwx5715-setup.c
 *
 * Gemtek GTWX5715 (Linksys WRV54G) board setup
 *
 * Copyright (C) 2004 George T. Joseph
 * Derived from Coyote
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#include <linux/init.h>
#include <linux/device.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_8250.h>
#include <linux/slab.h>

#include <asm/types.h>
#include <asm/setup.h>
#include <asm/memory.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/arch/gtwx5715.h>

/*
 * Xscale UART registers are 32 bits wide with only the least
 * significant 8 bits having any meaning.  From a configuration
 * perspective, this means 2 things...
 *
 *   Setting .regshift = 2 so that the standard 16550 registers
 *   line up on every 4th byte.
 *
 *   Shifting the register start virtual address +3 bytes when
 *   compiled big-endian.  Since register writes are done on a
 *   single byte basis, if the shift isn't done the driver will
 *   write the value into the most significant byte of the register,
 *   which is ignored, instead of the least significant.
 */

#ifdef      __ARMEB__
#define     REG_OFFSET  3
#else
#define     REG_OFFSET  0
#endif

/*
 * Only the second or "console" uart is connected on the gtwx5715.
 */

static struct resource gtwx5715_uart_resources[] = {
      {
            .start      = IXP4XX_UART2_BASE_PHYS,
            .end  = IXP4XX_UART2_BASE_PHYS + 0x0fff,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = IRQ_IXP4XX_UART2,
            .end  = IRQ_IXP4XX_UART2,
            .flags      = IORESOURCE_IRQ,
      },
      { },
};


static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
      {
      .mapbase    = IXP4XX_UART2_BASE_PHYS,
      .membase    = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
      .irq        = IRQ_IXP4XX_UART2,
      .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
      .iotype           = UPIO_MEM,
      .regshift   = 2,
      .uartclk    = IXP4XX_UART_XTAL,
      },
      { },
};

static struct platform_device gtwx5715_uart_device = {
      .name       = "serial8250",
      .id         = PLAT8250_DEV_PLATFORM,
      .dev              = {
            .platform_data    = gtwx5715_uart_platform_data,
      },
      .num_resources    = 2,
      .resource   = gtwx5715_uart_resources,
};

static struct flash_platform_data gtwx5715_flash_data = {
      .map_name   = "cfi_probe",
      .width            = 2,
};

static struct resource gtwx5715_flash_resource = {
      .flags            = IORESOURCE_MEM,
};

static struct platform_device gtwx5715_flash = {
      .name       = "IXP4XX-Flash",
      .id         = 0,
      .dev        = {
            .platform_data = &gtwx5715_flash_data,
      },
      .num_resources    = 1,
      .resource   = &gtwx5715_flash_resource,
};

static struct platform_device *gtwx5715_devices[] __initdata = {
      &gtwx5715_uart_device,
      &gtwx5715_flash,
};

static void __init gtwx5715_init(void)
{
      ixp4xx_sys_init();

      gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
      gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;

      platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
}


MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
      /* Maintainer: George Joseph */
      .phys_io    = IXP4XX_UART2_BASE_PHYS,
      .io_pg_offst      = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
      .map_io           = ixp4xx_map_io,
      .init_irq   = ixp4xx_init_irq,
      .timer            = &ixp4xx_timer,
      .boot_params      = 0x0100,
      .init_machine     = gtwx5715_init,
MACHINE_END



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