LXR linux/arch/arm/mach-ixp4xx/gtwx5715-setup.c

   1/*
   2 * arch/arm/mach-ixp4xx/gtwx5715-setup.c
   3 *
   4 * Gemtek GTWX5715 (Linksys WRV54G) board setup
   5 *
   6 * Copyright (C) 2004 George T. Joseph
   7 * Derived from Coyote
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License
  11 * as published by the Free Software Foundation; either version 2
  12 * of the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22 *
  23 */
  24
  25#include <linux/init.h>
  26#include <linux/device.h>
  27#include <linux/serial.h>
  28#include <linux/tty.h>
  29#include <linux/serial_8250.h>
  30#include <linux/slab.h>
  31
  32#include <asm/types.h>
  33#include <asm/setup.h>
  34#include <asm/memory.h>
  35#include <mach/hardware.h>
  36#include <asm/irq.h>
  37#include <asm/mach-types.h>
  38#include <asm/mach/arch.h>
  39#include <asm/mach/flash.h>
  40#include <mach/gtwx5715.h>
  41
  42/*
  43 * Xscale UART registers are 32 bits wide with only the least
  44 * significant 8 bits having any meaning.  From a configuration
  45 * perspective, this means 2 things...
  46 *
  47 *   Setting .regshift = 2 so that the standard 16550 registers
  48 *   line up on every 4th byte.
  49 *
  50 *   Shifting the register start virtual address +3 bytes when
  51 *   compiled big-endian.  Since register writes are done on a
  52 *   single byte basis, if the shift isn't done the driver will
  53 *   write the value into the most significant byte of the register,
  54 *   which is ignored, instead of the least significant.
  55 */
  56
  57#ifdef  __ARMEB__
  58#define REG_OFFSET      3
  59#else
  60#define REG_OFFSET      0
  61#endif
  62
  63/*
  64 * Only the second or "console" uart is connected on the gtwx5715.
  65 */
  66
  67static struct resource gtwx5715_uart_resources[] = {
  68        {
  69                .start  = IXP4XX_UART2_BASE_PHYS,
  70                .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  71                .flags  = IORESOURCE_MEM,
  72        },
  73        {
  74                .start  = IRQ_IXP4XX_UART2,
  75                .end    = IRQ_IXP4XX_UART2,
  76                .flags  = IORESOURCE_IRQ,
  77        },
  78        { },
  79};
  80
  81
  82static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
  83        {
  84        .mapbase        = IXP4XX_UART2_BASE_PHYS,
  85        .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
  86        .irq            = IRQ_IXP4XX_UART2,
  87        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  88        .iotype         = UPIO_MEM,
  89        .regshift       = 2,
  90        .uartclk        = IXP4XX_UART_XTAL,
  91        },
  92        { },
  93};
  94
  95static struct platform_device gtwx5715_uart_device = {
  96        .name           = "serial8250",
  97        .id             = PLAT8250_DEV_PLATFORM,
  98        .dev                    = {
  99                .platform_data  = gtwx5715_uart_platform_data,
 100        },
 101        .num_resources  = 2,
 102        .resource       = gtwx5715_uart_resources,
 103};
 104
 105static struct flash_platform_data gtwx5715_flash_data = {
 106        .map_name       = "cfi_probe",
 107        .width          = 2,
 108};
 109
 110static struct resource gtwx5715_flash_resource = {
 111        .flags          = IORESOURCE_MEM,
 112};
 113
 114static struct platform_device gtwx5715_flash = {
 115        .name           = "IXP4XX-Flash",
 116        .id             = 0,
 117        .dev            = {
 118                .platform_data = &gtwx5715_flash_data,
 119        },
 120        .num_resources  = 1,
 121        .resource       = &gtwx5715_flash_resource,
 122};
 123
 124static struct platform_device *gtwx5715_devices[] __initdata = {
 125        &gtwx5715_uart_device,
 126        &gtwx5715_flash,
 127};
 128
 129static void __init gtwx5715_init(void)
 130{
 131        ixp4xx_sys_init();
 132
 133        gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 134        gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
 135
 136        platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 137}
 138
 139
 140MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 141        /* Maintainer: George Joseph */
 142        .phys_io        = IXP4XX_UART2_BASE_PHYS,
 143        .io_pg_offst    = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
 144        .map_io         = ixp4xx_map_io,
 145        .init_irq       = ixp4xx_init_irq,
 146        .timer          = &ixp4xx_timer,
 147        .boot_params    = 0x0100,
 148        .init_machine   = gtwx5715_init,
 149MACHINE_END
 150
 151
 152