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   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
  30 #include <asm/mach-types.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/flash.h>
  33 #include <asm/mach/time.h>
  34 #include <asm/gpio.h>
  35
  36 static struct flash_platform_data nslu2_flash_data = {
  37         .map_name               = "cfi_probe",
  38         .width                  = 2,
  39 };
  40
  41 static struct resource nslu2_flash_resource = {
  42         .flags                  = IORESOURCE_MEM,
  43 };
  44
  45 static struct platform_device nslu2_flash = {
  46         .name                   = "IXP4XX-Flash",
  47         .id                     = 0,
  48         .dev.platform_data      = &nslu2_flash_data,
  49         .num_resources          = 1,
  50         .resource               = &nslu2_flash_resource,
  51 };
  52
  53 static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
  54         .sda_pin                = NSLU2_SDA_PIN,
  55         .scl_pin                = NSLU2_SCL_PIN,
  56 };
  57
  58 static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
  59         {
  60                 I2C_BOARD_INFO("x1205", 0x6f),
  61         },
  62 };
  63
  64 static struct gpio_led nslu2_led_pins[] = {
  65         {
  66                 .name           = "nslu2:green:ready",
  67                 .gpio           = NSLU2_LED_GRN_GPIO,
  68         },
  69         {
  70                 .name           = "nslu2:red:status",
  71                 .gpio           = NSLU2_LED_RED_GPIO,
  72         },
  73         {
  74                 .name           = "nslu2:green:disk-1",
  75                 .gpio           = NSLU2_LED_DISK1_GPIO,
  76                 .active_low     = true,
  77         },
  78         {
  79                 .name           = "nslu2:green:disk-2",
  80                 .gpio           = NSLU2_LED_DISK2_GPIO,
  81                 .active_low     = true,
  82         },
  83 };
  84
  85 static struct gpio_led_platform_data nslu2_led_data = {
  86         .num_leds               = ARRAY_SIZE(nslu2_led_pins),
  87         .leds                   = nslu2_led_pins,
  88 };
  89
  90 static struct platform_device nslu2_leds = {
  91         .name                   = "leds-gpio",
  92         .id                     = -1,
  93         .dev.platform_data      = &nslu2_led_data,
  94 };
  95
  96 static struct platform_device nslu2_i2c_gpio = {
  97         .name                   = "i2c-gpio",
  98         .id                     = 0,
  99         .dev     = {
 100                 .platform_data  = &nslu2_i2c_gpio_data,
 101         },
 102 };
 103
 104 static struct platform_device nslu2_beeper = {
 105         .name                   = "ixp4xx-beeper",
 106         .id                     = NSLU2_GPIO_BUZZ,
 107         .num_resources          = 0,
 108 };
 109
 110 static struct resource nslu2_uart_resources[] = {
 111         {
 112                 .start          = IXP4XX_UART1_BASE_PHYS,
 113                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
 114                 .flags          = IORESOURCE_MEM,
 115         },
 116         {
 117                 .start          = IXP4XX_UART2_BASE_PHYS,
 118                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
 119                 .flags          = IORESOURCE_MEM,
 120         }
 121 };
 122
 123 static struct plat_serial8250_port nslu2_uart_data[] = {
 124         {
 125                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
 126                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
 127                 .irq            = IRQ_IXP4XX_UART1,
 128                 .flags          = UPF_BOOT_AUTOCONF,
 129                 .iotype         = UPIO_MEM,
 130                 .regshift       = 2,
 131                 .uartclk        = IXP4XX_UART_XTAL,
 132         },
 133         {
 134                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
 135                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 136                 .irq            = IRQ_IXP4XX_UART2,
 137                 .flags          = UPF_BOOT_AUTOCONF,
 138                 .iotype         = UPIO_MEM,
 139                 .regshift       = 2,
 140                 .uartclk        = IXP4XX_UART_XTAL,
 141         },
 142         { }
 143 };
 144
 145 static struct platform_device nslu2_uart = {
 146         .name                   = "serial8250",
 147         .id                     = PLAT8250_DEV_PLATFORM,
 148         .dev.platform_data      = nslu2_uart_data,
 149         .num_resources          = 2,
 150         .resource               = nslu2_uart_resources,
 151 };
 152
 153 /* Built-in 10/100 Ethernet MAC interfaces */
 154 static struct eth_plat_info nslu2_plat_eth[] = {
 155         {
 156                 .phy            = 1,
 157                 .rxq            = 3,
 158                 .txreadyq       = 20,
 159         }
 160 };
 161
 162 static struct platform_device nslu2_eth[] = {
 163         {
 164                 .name                   = "ixp4xx_eth",
 165                 .id                     = IXP4XX_ETH_NPEB,
 166                 .dev.platform_data      = nslu2_plat_eth,
 167         }
 168 };
 169
 170 static struct platform_device *nslu2_devices[] __initdata = {
 171         &nslu2_i2c_gpio,
 172         &nslu2_flash,
 173         &nslu2_beeper,
 174         &nslu2_leds,
 175         &nslu2_eth[0],
 176 };
 177
 178 static void nslu2_power_off(void)
 179 {
 180         /* This causes the box to drop the power and go dead. */
 181
 182         /* enable the pwr cntl gpio */
 183         gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
 184
 185         /* do the deed */
 186         gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
 187 }
 188
 189 static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
 190 {
 191         /* Signal init to do the ctrlaltdel action, this will bypass init if
 192          * it hasn't started and do a kernel_restart.
 193          */
 194         ctrl_alt_del();
 195
 196         return IRQ_HANDLED;
 197 }
 198
 199 static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
 200 {
 201         /* This is the paper-clip reset, it shuts the machine down directly.
 202          */
 203         machine_power_off();
 204
 205         return IRQ_HANDLED;
 206 }
 207
 208 static void __init nslu2_timer_init(void)
 209 {
 210     /* The xtal on this machine is non-standard. */
 211     ixp4xx_timer_freq = NSLU2_FREQ;
 212
 213     /* Call standard timer_init function. */
 214     ixp4xx_timer_init();
 215 }
 216
 217 static struct sys_timer nslu2_timer = {
 218     .init   = nslu2_timer_init,
 219 };
 220
 221 static void __init nslu2_init(void)
 222 {
 223         DECLARE_MAC_BUF(mac_buf);
 224         uint8_t __iomem *f;
 225         int i;
 226
 227         ixp4xx_sys_init();
 228
 229         nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 230         nslu2_flash_resource.end =
 231                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 232
 233         i2c_register_board_info(0, nslu2_i2c_board_info,
 234                                 ARRAY_SIZE(nslu2_i2c_board_info));
 235
 236         /*
 237          * This is only useful on a modified machine, but it is valuable
 238          * to have it first in order to see debug messages, and so that
 239          * it does *not* get removed if platform_add_devices fails!
 240          */
 241         (void)platform_device_register(&nslu2_uart);
 242
 243         platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
 244
 245         pm_power_off = nslu2_power_off;
 246
 247         if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
 248                 IRQF_DISABLED | IRQF_TRIGGER_LOW,
 249                 "NSLU2 reset button", NULL) < 0) {
 250
 251                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 252                         gpio_to_irq(NSLU2_RB_GPIO));
 253         }
 254
 255         if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
 256                 IRQF_DISABLED | IRQF_TRIGGER_HIGH,
 257                 "NSLU2 power button", NULL) < 0) {
 258
 259                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 260                         gpio_to_irq(NSLU2_PB_GPIO));
 261         }
 262
 263         /*
 264          * Map in a portion of the flash and read the MAC address.
 265          * Since it is stored in BE in the flash itself, we need to
 266          * byteswap it if we're in LE mode.
 267          */
 268         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
 269         if (f) {
 270                 for (i = 0; i < 6; i++)
 271 #ifdef __ARMEB__
 272                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
 273 #else
 274                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
 275 #endif
 276                 iounmap(f);
 277         }
 278         printk(KERN_INFO "NSLU2: Using MAC address %s for port 0\n",
 279                print_mac(mac_buf, nslu2_plat_eth[0].hwaddr));
 280
 281 }
 282
 283 MACHINE_START(NSLU2, "Linksys NSLU2")
 284         /* Maintainer: www.nslu2-linux.org */
 285         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
 286         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
 287         .boot_params    = 0x00000100,
 288         .map_io         = ixp4xx_map_io,
 289         .init_irq       = ixp4xx_init_irq,
 290         .timer          = &nslu2_timer,
 291         .init_machine   = nslu2_init,
 292 MACHINE_END