LXR linux/arch/arm/mach-ixp4xx/nslu2-setup.c

   1/*
   2 * arch/arm/mach-ixp4xx/nslu2-setup.c
   3 *
   4 * NSLU2 board-setup
   5 *
   6 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
   7 *
   8 * based on ixdp425-setup.c:
   9 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
  10 * based on nslu2-power.c:
  11 *      Copyright (C) 2005 Tower Technologies
  12 *
  13 * Author: Mark Rakes <mrakes at mac.com>
  14 * Author: Rod Whitby <rod@whitby.id.au>
  15 * Author: Alessandro Zummo <a.zummo@towertech.it>
  16 * Maintainers: http://www.nslu2-linux.org/
  17 *
  18 */
  19
  20#include <linux/if_ether.h>
  21#include <linux/irq.h>
  22#include <linux/serial.h>
  23#include <linux/serial_8250.h>
  24#include <linux/leds.h>
  25#include <linux/reboot.h>
  26#include <linux/i2c.h>
  27#include <linux/i2c-gpio.h>
  28#include <linux/io.h>
  29#include <asm/mach-types.h>
  30#include <asm/mach/arch.h>
  31#include <asm/mach/flash.h>
  32#include <asm/mach/time.h>
  33#include <asm/gpio.h>
  34
  35#define NSLU2_SDA_PIN           7
  36#define NSLU2_SCL_PIN           6
  37
  38/* NSLU2 Timer */
  39#define NSLU2_FREQ 66000000
  40
  41/* Buttons */
  42#define NSLU2_PB_GPIO           5       /* power button */
  43#define NSLU2_PO_GPIO           8       /* power off */
  44#define NSLU2_RB_GPIO           12      /* reset button */
  45
  46/* Buzzer */
  47#define NSLU2_GPIO_BUZZ         4
  48
  49/* LEDs */
  50#define NSLU2_LED_RED_GPIO      0
  51#define NSLU2_LED_GRN_GPIO      1
  52#define NSLU2_LED_DISK1_GPIO    3
  53#define NSLU2_LED_DISK2_GPIO    2
  54
  55static struct flash_platform_data nslu2_flash_data = {
  56        .map_name               = "cfi_probe",
  57        .width                  = 2,
  58};
  59
  60static struct resource nslu2_flash_resource = {
  61        .flags                  = IORESOURCE_MEM,
  62};
  63
  64static struct platform_device nslu2_flash = {
  65        .name                   = "IXP4XX-Flash",
  66        .id                     = 0,
  67        .dev.platform_data      = &nslu2_flash_data,
  68        .num_resources          = 1,
  69        .resource               = &nslu2_flash_resource,
  70};
  71
  72static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
  73        .sda_pin                = NSLU2_SDA_PIN,
  74        .scl_pin                = NSLU2_SCL_PIN,
  75};
  76
  77static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
  78        {
  79                I2C_BOARD_INFO("x1205", 0x6f),
  80        },
  81};
  82
  83static struct gpio_led nslu2_led_pins[] = {
  84        {
  85                .name           = "nslu2:green:ready",
  86                .gpio           = NSLU2_LED_GRN_GPIO,
  87        },
  88        {
  89                .name           = "nslu2:red:status",
  90                .gpio           = NSLU2_LED_RED_GPIO,
  91        },
  92        {
  93                .name           = "nslu2:green:disk-1",
  94                .gpio           = NSLU2_LED_DISK1_GPIO,
  95                .active_low     = true,
  96        },
  97        {
  98                .name           = "nslu2:green:disk-2",
  99                .gpio           = NSLU2_LED_DISK2_GPIO,
 100                .active_low     = true,
 101        },
 102};
 103
 104static struct gpio_led_platform_data nslu2_led_data = {
 105        .num_leds               = ARRAY_SIZE(nslu2_led_pins),
 106        .leds                   = nslu2_led_pins,
 107};
 108
 109static struct platform_device nslu2_leds = {
 110        .name                   = "leds-gpio",
 111        .id                     = -1,
 112        .dev.platform_data      = &nslu2_led_data,
 113};
 114
 115static struct platform_device nslu2_i2c_gpio = {
 116        .name                   = "i2c-gpio",
 117        .id                     = 0,
 118        .dev     = {
 119                .platform_data  = &nslu2_i2c_gpio_data,
 120        },
 121};
 122
 123static struct platform_device nslu2_beeper = {
 124        .name                   = "ixp4xx-beeper",
 125        .id                     = NSLU2_GPIO_BUZZ,
 126        .num_resources          = 0,
 127};
 128
 129static struct resource nslu2_uart_resources[] = {
 130        {
 131                .start          = IXP4XX_UART1_BASE_PHYS,
 132                .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
 133                .flags          = IORESOURCE_MEM,
 134        },
 135        {
 136                .start          = IXP4XX_UART2_BASE_PHYS,
 137                .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
 138                .flags          = IORESOURCE_MEM,
 139        }
 140};
 141
 142static struct plat_serial8250_port nslu2_uart_data[] = {
 143        {
 144                .mapbase        = IXP4XX_UART1_BASE_PHYS,
 145                .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
 146                .irq            = IRQ_IXP4XX_UART1,
 147                .flags          = UPF_BOOT_AUTOCONF,
 148                .iotype         = UPIO_MEM,
 149                .regshift       = 2,
 150                .uartclk        = IXP4XX_UART_XTAL,
 151        },
 152        {
 153                .mapbase        = IXP4XX_UART2_BASE_PHYS,
 154                .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 155                .irq            = IRQ_IXP4XX_UART2,
 156                .flags          = UPF_BOOT_AUTOCONF,
 157                .iotype         = UPIO_MEM,
 158                .regshift       = 2,
 159                .uartclk        = IXP4XX_UART_XTAL,
 160        },
 161        { }
 162};
 163
 164static struct platform_device nslu2_uart = {
 165        .name                   = "serial8250",
 166        .id                     = PLAT8250_DEV_PLATFORM,
 167        .dev.platform_data      = nslu2_uart_data,
 168        .num_resources          = 2,
 169        .resource               = nslu2_uart_resources,
 170};
 171
 172/* Built-in 10/100 Ethernet MAC interfaces */
 173static struct eth_plat_info nslu2_plat_eth[] = {
 174        {
 175                .phy            = 1,
 176                .rxq            = 3,
 177                .txreadyq       = 20,
 178        }
 179};
 180
 181static struct platform_device nslu2_eth[] = {
 182        {
 183                .name                   = "ixp4xx_eth",
 184                .id                     = IXP4XX_ETH_NPEB,
 185                .dev.platform_data      = nslu2_plat_eth,
 186        }
 187};
 188
 189static struct platform_device *nslu2_devices[] __initdata = {
 190        &nslu2_i2c_gpio,
 191        &nslu2_flash,
 192        &nslu2_beeper,
 193        &nslu2_leds,
 194        &nslu2_eth[0],
 195};
 196
 197static void nslu2_power_off(void)
 198{
 199        /* This causes the box to drop the power and go dead. */
 200
 201        /* enable the pwr cntl gpio */
 202        gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
 203
 204        /* do the deed */
 205        gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
 206}
 207
 208static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
 209{
 210        /* Signal init to do the ctrlaltdel action, this will bypass init if
 211         * it hasn't started and do a kernel_restart.
 212         */
 213        ctrl_alt_del();
 214
 215        return IRQ_HANDLED;
 216}
 217
 218static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
 219{
 220        /* This is the paper-clip reset, it shuts the machine down directly.
 221         */
 222        machine_power_off();
 223
 224        return IRQ_HANDLED;
 225}
 226
 227static void __init nslu2_timer_init(void)
 228{
 229    /* The xtal on this machine is non-standard. */
 230    ixp4xx_timer_freq = NSLU2_FREQ;
 231
 232    /* Call standard timer_init function. */
 233    ixp4xx_timer_init();
 234}
 235
 236static struct sys_timer nslu2_timer = {
 237    .init   = nslu2_timer_init,
 238};
 239
 240static void __init nslu2_init(void)
 241{
 242        uint8_t __iomem *f;
 243        int i;
 244
 245        ixp4xx_sys_init();
 246
 247        nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 248        nslu2_flash_resource.end =
 249                IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 250
 251        i2c_register_board_info(0, nslu2_i2c_board_info,
 252                                ARRAY_SIZE(nslu2_i2c_board_info));
 253
 254        /*
 255         * This is only useful on a modified machine, but it is valuable
 256         * to have it first in order to see debug messages, and so that
 257         * it does *not* get removed if platform_add_devices fails!
 258         */
 259        (void)platform_device_register(&nslu2_uart);
 260
 261        platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
 262
 263        pm_power_off = nslu2_power_off;
 264
 265        if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
 266                IRQF_DISABLED | IRQF_TRIGGER_LOW,
 267                "NSLU2 reset button", NULL) < 0) {
 268
 269                printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 270                        gpio_to_irq(NSLU2_RB_GPIO));
 271        }
 272
 273        if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
 274                IRQF_DISABLED | IRQF_TRIGGER_HIGH,
 275                "NSLU2 power button", NULL) < 0) {
 276
 277                printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 278                        gpio_to_irq(NSLU2_PB_GPIO));
 279        }
 280
 281        /*
 282         * Map in a portion of the flash and read the MAC address.
 283         * Since it is stored in BE in the flash itself, we need to
 284         * byteswap it if we're in LE mode.
 285         */
 286        f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
 287        if (f) {
 288                for (i = 0; i < 6; i++)
 289#ifdef __ARMEB__
 290                        nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
 291#else
 292                        nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
 293#endif
 294                iounmap(f);
 295        }
 296        printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
 297               nslu2_plat_eth[0].hwaddr);
 298
 299}
 300
 301MACHINE_START(NSLU2, "Linksys NSLU2")
 302        /* Maintainer: www.nslu2-linux.org */
 303        .boot_params    = 0x00000100,
 304        .map_io         = ixp4xx_map_io,
 305        .init_irq       = ixp4xx_init_irq,
 306        .timer          = &nslu2_timer,
 307        .init_machine   = nslu2_init,
 308MACHINE_END
 309