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

   1 /*
   2  * arch/arm/mach-ixp4xx/gtwx5715-setup.c
   3  *
   4  * Gemtek GTWX5715 (Linksys WRV54G) board settup
   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
  31 #include <asm/types.h>
  32 #include <asm/setup.h>
  33 #include <asm/memory.h>
  34 #include <asm/hardware.h>
  35 #include <asm/irq.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/mach/arch.h>
  38 #include <asm/mach/flash.h>
  39 #include <asm/arch/gtwx5715.h>
  40
  41 /*
  42  * Xscale UART registers are 32 bits wide with only the least
  43  * significant 8 bits having any meaning.  From a configuration
  44  * perspective, this means 2 things...
  45  *
  46  *   Setting .regshift = 2 so that the standard 16550 registers
  47  *   line up on every 4th byte.
  48  *
  49  *   Shifting the register start virtual address +3 bytes when
  50  *   compiled big-endian.  Since register writes are done on a
  51  *   single byte basis, if the shift isn't done the driver will
  52  *   write the value into the most significant byte of the register,
  53  *   which is ignored, instead of the least significant.
  54  */
  55
  56 #ifdef  __ARMEB__
  57 #define REG_OFFSET      3
  58 #else
  59 #define REG_OFFSET      0
  60 #endif
  61
  62 /*
  63  * Only the second or "console" uart is connected on the gtwx5715.
  64  */
  65
  66 static struct resource gtwx5715_uart_resources[] = {
  67         {
  68                 .start  = IXP4XX_UART2_BASE_PHYS,
  69                 .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  70                 .flags  = IORESOURCE_MEM,
  71         },
  72         {
  73                 .start  = IRQ_IXP4XX_UART2,
  74                 .end    = IRQ_IXP4XX_UART2,
  75                 .flags  = IORESOURCE_IRQ,
  76         },
  77         { },
  78 };
  79
  80
  81 static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
  82         {
  83         .mapbase        = IXP4XX_UART2_BASE_PHYS,
  84         .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
  85         .irq            = IRQ_IXP4XX_UART2,
  86         .flags          = UPF_BOOT_AUTOCONF,
  87         .iotype         = UPIO_MEM,
  88         .regshift       = 2,
  89         .uartclk        = IXP4XX_UART_XTAL,
  90         },
  91         { },
  92 };
  93
  94 static struct platform_device gtwx5715_uart_device = {
  95         .name           = "serial8250",
  96         .id             = 0,
  97         .dev                    = {
  98                 .platform_data  = gtwx5715_uart_platform_data,
  99         },
 100         .num_resources  = 2,
 101         .resource       = gtwx5715_uart_resources,
 102 };
 103
 104
 105 void __init gtwx5715_map_io(void)
 106 {
 107         ixp4xx_map_io();
 108 }
 109
 110 static struct flash_platform_data gtwx5715_flash_data = {
 111         .map_name       = "cfi_probe",
 112         .width          = 2,
 113 };
 114
 115 static struct resource gtwx5715_flash_resource = {
 116         .start          = GTWX5715_FLASH_BASE,
 117         .end            = GTWX5715_FLASH_BASE + GTWX5715_FLASH_SIZE,
 118         .flags          = IORESOURCE_MEM,
 119 };
 120
 121 static struct platform_device gtwx5715_flash = {
 122         .name           = "IXP4XX-Flash",
 123         .id             = 0,
 124         .dev            = {
 125                 .platform_data = &gtwx5715_flash_data,
 126         },
 127         .num_resources  = 1,
 128         .resource       = &gtwx5715_flash_resource,
 129 };
 130
 131 static struct platform_device *gtwx5715_devices[] __initdata = {
 132         &gtwx5715_uart_device,
 133         &gtwx5715_flash,
 134 };
 135
 136 static void __init gtwx5715_init(void)
 137 {
 138         platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 139 }
 140
 141
 142 MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 143         MAINTAINER("George Joseph")
 144         BOOT_MEM(PHYS_OFFSET, IXP4XX_UART2_BASE_PHYS,
 145                 IXP4XX_UART2_BASE_VIRT)
 146         MAPIO(gtwx5715_map_io)
 147         INITIRQ(ixp4xx_init_irq)
 148                   .timer                = &ixp4xx_timer,
 149         BOOT_PARAMS(0x0100)
 150         INIT_MACHINE(gtwx5715_init)
 151 MACHINE_END
 152
 153