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   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  * Author: Rod Whitby <rod@whitby.id.au>
  11  * Maintainers: http://www.nslu2-linux.org/
  12  *
  13  * Fixed missing init_time in MACHINE_START kas11 10/22/04
  14  * Changed to conform to new style __init ixdp425 kas11 10/22/04
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/serial.h>
  19 #include <linux/serial_8250.h>
  20 #include <linux/leds.h>
  21
  22 #include <asm/mach-types.h>
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/flash.h>
  25
  26 static struct flash_platform_data nslu2_flash_data = {
  27         .map_name               = "cfi_probe",
  28         .width                  = 2,
  29 };
  30
  31 static struct resource nslu2_flash_resource = {
  32         .flags                  = IORESOURCE_MEM,
  33 };
  34
  35 static struct platform_device nslu2_flash = {
  36         .name                   = "IXP4XX-Flash",
  37         .id                     = 0,
  38         .dev.platform_data      = &nslu2_flash_data,
  39         .num_resources          = 1,
  40         .resource               = &nslu2_flash_resource,
  41 };
  42
  43 static struct ixp4xx_i2c_pins nslu2_i2c_gpio_pins = {
  44         .sda_pin                = NSLU2_SDA_PIN,
  45         .scl_pin                = NSLU2_SCL_PIN,
  46 };
  47
  48 #ifdef CONFIG_LEDS_IXP4XX
  49 static struct resource nslu2_led_resources[] = {
  50         {
  51                 .name           = "ready",  /* green led */
  52                 .start          = NSLU2_LED_GRN,
  53                 .end            = NSLU2_LED_GRN,
  54                 .flags          = IXP4XX_GPIO_HIGH,
  55         },
  56         {
  57                 .name           = "status", /* red led */
  58                 .start          = NSLU2_LED_RED,
  59                 .end            = NSLU2_LED_RED,
  60                 .flags          = IXP4XX_GPIO_HIGH,
  61         },
  62         {
  63                 .name           = "disk-1",
  64                 .start          = NSLU2_LED_DISK1,
  65                 .end            = NSLU2_LED_DISK1,
  66                 .flags          = IXP4XX_GPIO_LOW,
  67         },
  68         {
  69                 .name           = "disk-2",
  70                 .start          = NSLU2_LED_DISK2,
  71                 .end            = NSLU2_LED_DISK2,
  72                 .flags          = IXP4XX_GPIO_LOW,
  73         },
  74 };
  75
  76 static struct platform_device nslu2_leds = {
  77         .name                   = "IXP4XX-GPIO-LED",
  78         .id                     = -1,
  79         .num_resources          = ARRAY_SIZE(nslu2_led_resources),
  80         .resource               = nslu2_led_resources,
  81 };
  82 #endif
  83
  84 static struct platform_device nslu2_i2c_controller = {
  85         .name                   = "IXP4XX-I2C",
  86         .id                     = 0,
  87         .dev.platform_data      = &nslu2_i2c_gpio_pins,
  88         .num_resources          = 0,
  89 };
  90
  91 static struct platform_device nslu2_beeper = {
  92         .name                   = "ixp4xx-beeper",
  93         .id                     = NSLU2_GPIO_BUZZ,
  94         .num_resources          = 0,
  95 };
  96
  97 static struct resource nslu2_uart_resources[] = {
  98         {
  99                 .start          = IXP4XX_UART1_BASE_PHYS,
 100                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
 101                 .flags          = IORESOURCE_MEM,
 102         },
 103         {
 104                 .start          = IXP4XX_UART2_BASE_PHYS,
 105                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
 106                 .flags          = IORESOURCE_MEM,
 107         }
 108 };
 109
 110 static struct plat_serial8250_port nslu2_uart_data[] = {
 111         {
 112                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
 113                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
 114                 .irq            = IRQ_IXP4XX_UART1,
 115                 .flags          = UPF_BOOT_AUTOCONF,
 116                 .iotype         = UPIO_MEM,
 117                 .regshift       = 2,
 118                 .uartclk        = IXP4XX_UART_XTAL,
 119         },
 120         {
 121                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
 122                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 123                 .irq            = IRQ_IXP4XX_UART2,
 124                 .flags          = UPF_BOOT_AUTOCONF,
 125                 .iotype         = UPIO_MEM,
 126                 .regshift       = 2,
 127                 .uartclk        = IXP4XX_UART_XTAL,
 128         },
 129         { }
 130 };
 131
 132 static struct platform_device nslu2_uart = {
 133         .name                   = "serial8250",
 134         .id                     = PLAT8250_DEV_PLATFORM,
 135         .dev.platform_data      = nslu2_uart_data,
 136         .num_resources          = 2,
 137         .resource               = nslu2_uart_resources,
 138 };
 139
 140 static struct platform_device *nslu2_devices[] __initdata = {
 141         &nslu2_i2c_controller,
 142         &nslu2_flash,
 143         &nslu2_beeper,
 144 #ifdef CONFIG_LEDS_IXP4XX
 145         &nslu2_leds,
 146 #endif
 147 };
 148
 149 static void nslu2_power_off(void)
 150 {
 151         /* This causes the box to drop the power and go dead. */
 152
 153         /* enable the pwr cntl gpio */
 154         gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
 155
 156         /* do the deed */
 157         gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
 158 }
 159
 160 static void __init nslu2_init(void)
 161 {
 162         ixp4xx_timer_freq = NSLU2_FREQ;
 163
 164         ixp4xx_sys_init();
 165
 166         nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 167         nslu2_flash_resource.end =
 168                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 169
 170         pm_power_off = nslu2_power_off;
 171
 172         /* This is only useful on a modified machine, but it is valuable
 173          * to have it first in order to see debug messages, and so that
 174          * it does *not* get removed if platform_add_devices fails!
 175          */
 176         (void)platform_device_register(&nslu2_uart);
 177
 178         platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
 179 }
 180
 181 MACHINE_START(NSLU2, "Linksys NSLU2")
 182         /* Maintainer: www.nslu2-linux.org */
 183         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
 184         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
 185         .boot_params    = 0x00000100,
 186         .map_io         = ixp4xx_map_io,
 187         .init_irq       = ixp4xx_init_irq,
 188         .timer          = &ixp4xx_timer,
 189         .init_machine   = nslu2_init,
 190 MACHINE_END