org.handhelds.familiar/packages/linux/openslug-kernel-2.6.11.2/nslu2-setup.c

   1 /*
   2  * arch/arm/mach-ixp4xx/nslu2-setup.c
   3  *
   4  * NSLU2 board-setup
   5  *
   6  * based ixdp425-setup.c:
   7  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
   8  *
   9  * Author: Mark Rakes <mrakes at mac.com>
  10  * Maintainers: http://www.nslu2-linux.org/
  11  *
  12  * Fixed missing init_time in MACHINE_START kas11 10/22/04
  13  * Changed to conform to new style __init ixdp425 kas11 10/22/04
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/device.h>
  19 #include <linux/serial.h>
  20 #include <linux/tty.h>
  21 #include <linux/serial_core.h>
  22
  23 #include <asm/types.h>
  24 #include <asm/setup.h>
  25 #include <asm/memory.h>
  26 #include <asm/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/irq.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/flash.h>
  31
  32 #ifdef  __ARMEB__
  33 #define REG_OFFSET      3
  34 #else
  35 #define REG_OFFSET      0
  36 #endif
  37
  38 /*
  39  * NSLU2 uses only one serial port
  40  */
  41 static struct uart_port nslu2_serial_ports[] = {
  42         {
  43                 .membase        = (char*)(IXP4XX_UART1_BASE_VIRT + REG_OFFSET),
  44                 .mapbase        = (IXP4XX_UART1_BASE_PHYS),
  45                 .irq            = IRQ_IXP4XX_UART1,
  46                 .flags          = UPF_SKIP_TEST,
  47                 .iotype         = UPIO_MEM,
  48                 .regshift       = 2,
  49                 .uartclk        = IXP4XX_UART_XTAL,
  50                 .line           = 0,
  51                 .type           = PORT_XSCALE,
  52                 .fifosize       = 32
  53         }
  54 #if 0
  55         , {
  56                 .membase        = (char*)(IXP4XX_UART2_BASE_VIRT + REG_OFFSET),
  57                 .mapbase        = (IXP4XX_UART2_BASE_PHYS),
  58                 .irq            = IRQ_IXP4XX_UART2,
  59                 .flags          = UPF_SKIP_TEST,
  60                 .iotype         = UPIO_MEM,
  61                 .regshift       = 2,
  62                 .uartclk        = IXP4XX_UART_XTAL,
  63                 .line           = 1,
  64                 .type           = PORT_XSCALE,
  65                 .fifosize       = 32
  66         }
  67 #endif
  68 };
  69
  70 void __init nslu2_map_io(void)
  71 {
  72         early_serial_setup(&nslu2_serial_ports[0]);
  73 #if 0
  74         early_serial_setup(&nslu2_serial_ports[1]);
  75 #endif
  76         ixp4xx_map_io();
  77 }
  78
  79 static struct flash_platform_data nslu2_flash_data = {
  80         .map_name       = "cfi_probe",
  81         .width          = 2,
  82 };
  83
  84 static struct resource nslu2_flash_resource = {
  85         .start          = NSLU2_FLASH_BASE,
  86         .end            = NSLU2_FLASH_BASE + NSLU2_FLASH_SIZE,
  87         .flags          = IORESOURCE_MEM,
  88 };
  89
  90 static struct platform_device nslu2_flash = {
  91         .name           = "IXP4XX-Flash",
  92         .id             = 0,
  93         .dev            = {
  94                 .platform_data = &nslu2_flash_data,
  95         },
  96         .num_resources  = 1,
  97         .resource       = &nslu2_flash_resource,
  98 };
  99
 100 static struct ixp4xx_i2c_pins nslu2_i2c_gpio_pins = {
 101         .sda_pin        = NSLU2_SDA_PIN,
 102         .scl_pin        = NSLU2_SCL_PIN,
 103 };
 104
 105 static struct platform_device nslu2_i2c_controller = {
 106         .name           = "IXP4XX-I2C",
 107         .id             = 0,
 108         .dev            = {
 109                 .platform_data = &nslu2_i2c_gpio_pins,
 110         },
 111         .num_resources  = 0
 112 };
 113
 114 static struct platform_device *nslu2_devices[] __initdata = {
 115         &nslu2_i2c_controller,
 116         &nslu2_flash
 117 };
 118
 119 static void n2_power_off(void)
 120 {
 121         /* This causes the box to drop the power and go dead. */
 122 #define GPIO_PO_BM              0x0100  //b0000 0001 0000 0000
 123         *IXP4XX_GPIO_GPOER &= ~GPIO_PO_BM;      // enable the pwr cntl gpio
 124         *IXP4XX_GPIO_GPOUTR |= GPIO_PO_BM;      // do the deed
 125 }
 126
 127 static void __init nslu2_init(void)
 128 {
 129         /* Need power off to work. */
 130         pm_power_off = n2_power_off;
 131         platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
 132 }
 133
 134 MACHINE_START(NSLU2, "Linksys NSLU2")
 135         MAINTAINER("www.nslu2-linux.org")
 136         BOOT_MEM(PHYS_OFFSET, IXP4XX_PERIPHERAL_BASE_PHYS,
 137                 IXP4XX_PERIPHERAL_BASE_VIRT)
 138         MAPIO(nslu2_map_io)
 139         INITIRQ(ixp4xx_init_irq)        //FIXME: all irq are off here
 140         .timer          = &ixp4xx_timer,
 141         // INITTIME(ixp4xx_init_time)   //this was missing in 2.6.7 code ...soft reboot needed?
 142         BOOT_PARAMS(0x0100)
 143         INIT_MACHINE(nslu2_init)
 144 MACHINE_END