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 #include <asm/types.h>
  32 #include <asm/setup.h>
  33 #include <asm/memory.h>
  34 #include <mach/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
  40 /* GPIO 5,6,7 and 12 are hard wired to the Kendin KS8995M Switch
  41    and operate as an SPI type interface.  The details of the interface
  42    are available on Kendin/Micrel's web site. */
  43
  44 #define GTWX5715_KSSPI_SELECT   5
  45 #define GTWX5715_KSSPI_TXD      6
  46 #define GTWX5715_KSSPI_CLOCK    7
  47 #define GTWX5715_KSSPI_RXD      12
  48
  49 /* The "reset" button is wired to GPIO 3.
  50    The GPIO is brought "low" when the button is pushed. */
  51
  52 #define GTWX5715_BUTTON_GPIO    3
  53
  54 /* Board Label      Front Label
  55    LED1             Power
  56    LED2             Wireless-G
  57    LED3             not populated but could be
  58    LED4             Internet
  59    LED5 - LED8      Controlled by KS8995M Switch
  60    LED9             DMZ */
  61
  62 #define GTWX5715_LED1_GPIO      2
  63 #define GTWX5715_LED2_GPIO      9
  64 #define GTWX5715_LED3_GPIO      8
  65 #define GTWX5715_LED4_GPIO      1
  66 #define GTWX5715_LED9_GPIO      4
  67
  68 /*
  69  * Xscale UART registers are 32 bits wide with only the least
  70  * significant 8 bits having any meaning.  From a configuration
  71  * perspective, this means 2 things...
  72  *
  73  *   Setting .regshift = 2 so that the standard 16550 registers
  74  *   line up on every 4th byte.
  75  *
  76  *   Shifting the register start virtual address +3 bytes when
  77  *   compiled big-endian.  Since register writes are done on a
  78  *   single byte basis, if the shift isn't done the driver will
  79  *   write the value into the most significant byte of the register,
  80  *   which is ignored, instead of the least significant.
  81  */
  82
  83 #ifdef  __ARMEB__
  84 #define REG_OFFSET      3
  85 #else
  86 #define REG_OFFSET      0
  87 #endif
  88
  89 /*
  90  * Only the second or "console" uart is connected on the gtwx5715.
  91  */
  92
  93 static struct resource gtwx5715_uart_resources[] = {
  94         {
  95                 .start  = IXP4XX_UART2_BASE_PHYS,
  96                 .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  97                 .flags  = IORESOURCE_MEM,
  98         },
  99         {
 100                 .start  = IRQ_IXP4XX_UART2,
 101                 .end    = IRQ_IXP4XX_UART2,
 102                 .flags  = IORESOURCE_IRQ,
 103         },
 104         { },
 105 };
 106
 107
 108 static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
 109         {
 110         .mapbase        = IXP4XX_UART2_BASE_PHYS,
 111         .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 112         .irq            = IRQ_IXP4XX_UART2,
 113         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 114         .iotype         = UPIO_MEM,
 115         .regshift       = 2,
 116         .uartclk        = IXP4XX_UART_XTAL,
 117         },
 118         { },
 119 };
 120
 121 static struct platform_device gtwx5715_uart_device = {
 122         .name           = "serial8250",
 123         .id             = PLAT8250_DEV_PLATFORM,
 124         .dev                    = {
 125                 .platform_data  = gtwx5715_uart_platform_data,
 126         },
 127         .num_resources  = 2,
 128         .resource       = gtwx5715_uart_resources,
 129 };
 130
 131 static struct flash_platform_data gtwx5715_flash_data = {
 132         .map_name       = "cfi_probe",
 133         .width          = 2,
 134 };
 135
 136 static struct resource gtwx5715_flash_resource = {
 137         .flags          = IORESOURCE_MEM,
 138 };
 139
 140 static struct platform_device gtwx5715_flash = {
 141         .name           = "IXP4XX-Flash",
 142         .id             = 0,
 143         .dev            = {
 144                 .platform_data = &gtwx5715_flash_data,
 145         },
 146         .num_resources  = 1,
 147         .resource       = &gtwx5715_flash_resource,
 148 };
 149
 150 static struct platform_device *gtwx5715_devices[] __initdata = {
 151         &gtwx5715_uart_device,
 152         &gtwx5715_flash,
 153 };
 154
 155 static void __init gtwx5715_init(void)
 156 {
 157         ixp4xx_sys_init();
 158
 159         gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 160         gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
 161
 162         platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 163 }
 164
 165
 166 MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 167         /* Maintainer: George Joseph */
 168         .phys_io        = IXP4XX_UART2_BASE_PHYS,
 169         .io_pg_offst    = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
 170         .map_io         = ixp4xx_map_io,
 171         .init_irq       = ixp4xx_init_irq,
 172         .timer          = &ixp4xx_timer,
 173         .boot_params    = 0x0100,
 174         .init_machine   = gtwx5715_init,
 175 MACHINE_END
 176
 177