release/src-rt-6.x.4708/linux/linux-2.6.36/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 <asm/types.h>
  31 #include <asm/setup.h>
  32 #include <asm/memory.h>
  33 #include <mach/hardware.h>
  34 #include <asm/irq.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37 #include <asm/mach/flash.h>
  38
  39 /* GPIO 5,6,7 and 12 are hard wired to the Kendin KS8995M Switch
  40    and operate as an SPI type interface.  The details of the interface
  41    are available on Kendin/Micrel's web site. */
  42
  43 #define GTWX5715_KSSPI_SELECT   5
  44 #define GTWX5715_KSSPI_TXD      6
  45 #define GTWX5715_KSSPI_CLOCK    7
  46 #define GTWX5715_KSSPI_RXD      12
  47
  48 /* The "reset" button is wired to GPIO 3.
  49    The GPIO is brought "low" when the button is pushed. */
  50
  51 #define GTWX5715_BUTTON_GPIO    3
  52
  53 /* Board Label      Front Label
  54    LED1             Power
  55    LED2             Wireless-G
  56    LED3             not populated but could be
  57    LED4             Internet
  58    LED5 - LED8      Controlled by KS8995M Switch
  59    LED9             DMZ */
  60
  61 #define GTWX5715_LED1_GPIO      2
  62 #define GTWX5715_LED2_GPIO      9
  63 #define GTWX5715_LED3_GPIO      8
  64 #define GTWX5715_LED4_GPIO      1
  65 #define GTWX5715_LED9_GPIO      4
  66
  67 /*
  68  * Xscale UART registers are 32 bits wide with only the least
  69  * significant 8 bits having any meaning.  From a configuration
  70  * perspective, this means 2 things...
  71  *
  72  *   Setting .regshift = 2 so that the standard 16550 registers
  73  *   line up on every 4th byte.
  74  *
  75  *   Shifting the register start virtual address +3 bytes when
  76  *   compiled big-endian.  Since register writes are done on a
  77  *   single byte basis, if the shift isn't done the driver will
  78  *   write the value into the most significant byte of the register,
  79  *   which is ignored, instead of the least significant.
  80  */
  81
  82 #ifdef  __ARMEB__
  83 #define REG_OFFSET      3
  84 #else
  85 #define REG_OFFSET      0
  86 #endif
  87
  88 /*
  89  * Only the second or "console" uart is connected on the gtwx5715.
  90  */
  91
  92 static struct resource gtwx5715_uart_resources[] = {
  93         {
  94                 .start  = IXP4XX_UART2_BASE_PHYS,
  95                 .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  96                 .flags  = IORESOURCE_MEM,
  97         },
  98         {
  99                 .start  = IRQ_IXP4XX_UART2,
 100                 .end    = IRQ_IXP4XX_UART2,
 101                 .flags  = IORESOURCE_IRQ,
 102         },
 103         { },
 104 };
 105
 106
 107 static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
 108         {
 109         .mapbase        = IXP4XX_UART2_BASE_PHYS,
 110         .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 111         .irq            = IRQ_IXP4XX_UART2,
 112         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 113         .iotype         = UPIO_MEM,
 114         .regshift       = 2,
 115         .uartclk        = IXP4XX_UART_XTAL,
 116         },
 117         { },
 118 };
 119
 120 static struct platform_device gtwx5715_uart_device = {
 121         .name           = "serial8250",
 122         .id             = PLAT8250_DEV_PLATFORM,
 123         .dev                    = {
 124                 .platform_data  = gtwx5715_uart_platform_data,
 125         },
 126         .num_resources  = 2,
 127         .resource       = gtwx5715_uart_resources,
 128 };
 129
 130 static struct flash_platform_data gtwx5715_flash_data = {
 131         .map_name       = "cfi_probe",
 132         .width          = 2,
 133 };
 134
 135 static struct resource gtwx5715_flash_resource = {
 136         .flags          = IORESOURCE_MEM,
 137 };
 138
 139 static struct platform_device gtwx5715_flash = {
 140         .name           = "IXP4XX-Flash",
 141         .id             = 0,
 142         .dev            = {
 143                 .platform_data = &gtwx5715_flash_data,
 144         },
 145         .num_resources  = 1,
 146         .resource       = &gtwx5715_flash_resource,
 147 };
 148
 149 static struct platform_device *gtwx5715_devices[] __initdata = {
 150         &gtwx5715_uart_device,
 151         &gtwx5715_flash,
 152 };
 153
 154 static void __init gtwx5715_init(void)
 155 {
 156         ixp4xx_sys_init();
 157
 158         gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 159         gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
 160
 161         platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 162 }
 163
 164
 165 MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 166         /* Maintainer: George Joseph */
 167         .phys_io        = IXP4XX_UART2_BASE_PHYS,
 168         .io_pg_offst    = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
 169         .map_io         = ixp4xx_map_io,
 170         .init_irq       = ixp4xx_init_irq,
 171         .timer          = &ixp4xx_timer,
 172         .boot_params    = 0x0100,
 173         .init_machine   = gtwx5715_init,
 174 MACHINE_END