/* * arch/arm/mach-ixp4xx/nas100d-setup.c * * NAS 100d board-setup * * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> * * based on ixdp425-setup.c: * Copyright (C) 2003-2004 MontaVista Software, Inc. * based on nas100d-power.c: * Copyright (C) 2005 Tower Technologies * based on nas100d-io.c * Copyright (C) 2004 Karen Spearel * * Author: Alessandro Zummo <a.zummo@towertech.it> * Author: Rod Whitby <rod@whitby.id.au> * Maintainers: http://www.nslu2-linux.org/ * */ #include <linux/if_ether.h> #include <linux/irq.h> #include <linux/jiffies.h> #include <linux/timer.h> #include <linux/serial.h> #include <linux/serial_8250.h> #include <linux/leds.h> #include <linux/reboot.h> #include <linux/i2c.h> #include <linux/i2c-gpio.h> #include <linux/io.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/flash.h> #include <asm/gpio.h> #define NAS100D_SDA_PIN 5 #define NAS100D_SCL_PIN 6 /* Buttons */ #define NAS100D_PB_GPIO 14 /* power button */ #define NAS100D_RB_GPIO 4 /* reset button */ /* Power control */ #define NAS100D_PO_GPIO 12 /* power off */ /* LEDs */ #define NAS100D_LED_WLAN_GPIO 0 #define NAS100D_LED_DISK_GPIO 3 #define NAS100D_LED_PWR_GPIO 15 static struct flash_platform_data nas100d_flash_data = { .map_name = "cfi_probe", .width = 2, }; static struct resource nas100d_flash_resource = { .flags = IORESOURCE_MEM, }; static struct platform_device nas100d_flash = { .name = "IXP4XX-Flash", .id = 0, .dev.platform_data = &nas100d_flash_data, .num_resources = 1, .resource = &nas100d_flash_resource, }; static struct i2c_board_info __initdata nas100d_i2c_board_info [] = { { I2C_BOARD_INFO("pcf8563", 0x51), }, }; static struct gpio_led nas100d_led_pins[] = { { .name = "nas100d:green:wlan", .gpio = NAS100D_LED_WLAN_GPIO, .active_low = true, }, { .name = "nas100d:blue:power", /* (off=flashing) */ .gpio = NAS100D_LED_PWR_GPIO, .active_low = true, }, { .name = "nas100d:yellow:disk", .gpio = NAS100D_LED_DISK_GPIO, .active_low = true, }, }; static struct gpio_led_platform_data nas100d_led_data = { .num_leds = ARRAY_SIZE(nas100d_led_pins), .leds = nas100d_led_pins, }; static struct platform_device nas100d_leds = { .name = "leds-gpio", .id = -1, .dev.platform_data = &nas100d_led_data, }; static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = { .sda_pin = NAS100D_SDA_PIN, .scl_pin = NAS100D_SCL_PIN, }; static struct platform_device nas100d_i2c_gpio = { .name = "i2c-gpio", .id = 0, .dev = { .platform_data = &nas100d_i2c_gpio_data, }, }; static struct resource nas100d_uart_resources[] = { { .start = IXP4XX_UART1_BASE_PHYS, .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, .flags = IORESOURCE_MEM, }, { .start = IXP4XX_UART2_BASE_PHYS, .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, .flags = IORESOURCE_MEM, } }; static struct plat_serial8250_port nas100d_uart_data[] = { { .mapbase = IXP4XX_UART1_BASE_PHYS, .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, .irq = IRQ_IXP4XX_UART1, .flags = UPF_BOOT_AUTOCONF, .iotype = UPIO_MEM, .regshift = 2, .uartclk = IXP4XX_UART_XTAL, }, { .mapbase = IXP4XX_UART2_BASE_PHYS, .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, .irq = IRQ_IXP4XX_UART2, .flags = UPF_BOOT_AUTOCONF, .iotype = UPIO_MEM, .regshift = 2, .uartclk = IXP4XX_UART_XTAL, }, { } }; static struct platform_device nas100d_uart = { .name = "serial8250", .id = PLAT8250_DEV_PLATFORM, .dev.platform_data = nas100d_uart_data, .num_resources = 2, .resource = nas100d_uart_resources, }; /* Built-in 10/100 Ethernet MAC interfaces */ static struct eth_plat_info nas100d_plat_eth[] = { { .phy = 0, .rxq = 3, .txreadyq = 20, } }; static struct platform_device nas100d_eth[] = { { .name = "ixp4xx_eth", .id = IXP4XX_ETH_NPEB, .dev.platform_data = nas100d_plat_eth, } }; static struct platform_device *nas100d_devices[] __initdata = { &nas100d_i2c_gpio, &nas100d_flash, &nas100d_leds, &nas100d_eth[0], }; static void nas100d_power_off(void) { /* This causes the box to drop the power and go dead. */ /* enable the pwr cntl gpio */ gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT); /* do the deed */ gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH); } /* This is used to make sure the power-button pusher is serious. The button * must be held until the value of this counter reaches zero. */ static int power_button_countdown; /* Must hold the button down for at least this many counts to be processed */ #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ static void nas100d_power_handler(unsigned long data); static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0); static void nas100d_power_handler(unsigned long data) { /* This routine is called twice per second to check the * state of the power button. */ if (gpio_get_value(NAS100D_PB_GPIO)) { /* IO Pin is 1 (button pushed) */ if (power_button_countdown > 0) power_button_countdown--; } else { /* Done on button release, to allow for auto-power-on mods. */ if (power_button_countdown == 0) { /* Signal init to do the ctrlaltdel action, * this will bypass init if it hasn't started * and do a kernel_restart. */ ctrl_alt_del(); /* Change the state of the power LED to "blink" */ gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW); } else { power_button_countdown = PBUTTON_HOLDDOWN_COUNT; } } mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); } static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) { /* This is the paper-clip reset, it shuts the machine down directly. */ machine_power_off(); return IRQ_HANDLED; } static void __init nas100d_init(void) { uint8_t __iomem *f; int i; ixp4xx_sys_init(); /* gpio 14 and 15 are _not_ clocks */ *IXP4XX_GPIO_GPCLKR = 0; nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); nas100d_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; i2c_register_board_info(0, nas100d_i2c_board_info, ARRAY_SIZE(nas100d_i2c_board_info)); /* * This is only useful on a modified machine, but it is valuable * to have it first in order to see debug messages, and so that * it does *not* get removed if platform_add_devices fails! */ (void)platform_device_register(&nas100d_uart); platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); pm_power_off = nas100d_power_off; if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, "NAS100D reset button", NULL) < 0) { printk(KERN_DEBUG "Reset Button IRQ %d not available\n", gpio_to_irq(NAS100D_RB_GPIO)); } /* The power button on the Iomega NAS100d is on GPIO 14, but * it cannot handle interrupts on that GPIO line. So we'll * have to poll it with a kernel timer. */ /* Make sure that the power button GPIO is set up as an input */ gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN); /* Set the initial value for the power button IRQ handler */ power_button_countdown = PBUTTON_HOLDDOWN_COUNT; mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); /* * Map in a portion of the flash and read the MAC address. * Since it is stored in BE in the flash itself, we need to * byteswap it if we're in LE mode. */ f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000); if (f) { for (i = 0; i < 6; i++) #ifdef __ARMEB__ nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i); #else nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3)); #endif iounmap(f); } printk(KERN_INFO "NAS100D: Using MAC address %pM for port 0\n", nas100d_plat_eth[0].hwaddr); } MACHINE_START(NAS100D, "Iomega NAS 100d") /* Maintainer: www.nslu2-linux.org */ .boot_params = 0x00000100, .map_io = ixp4xx_map_io, .init_irq = ixp4xx_init_irq, .timer = &ixp4xx_timer, .init_machine = nas100d_init, MACHINE_END