diff options
Diffstat (limited to 'kernel/arch/arm/mach-ixp4xx/nas100d-setup.c')
| -rw-r--r-- | kernel/arch/arm/mach-ixp4xx/nas100d-setup.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ixp4xx/nas100d-setup.c b/kernel/arch/arm/mach-ixp4xx/nas100d-setup.c new file mode 100644 index 000000000..4e0f762bc --- /dev/null +++ b/kernel/arch/arm/mach-ixp4xx/nas100d-setup.c @@ -0,0 +1,336 @@ +/* + * 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/gpio.h> +#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> + +#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 and assert power off */ + gpio_direction_output(NAS100D_PO_GPIO, 1); +} + +/* 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_set_value(NAS100D_LED_PWR_GPIO, 0); + } 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 int __init nas100d_gpio_init(void) +{ + if (!machine_is_nas100d()) + return 0; + + /* + * 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. + */ + + /* Request the power off GPIO */ + gpio_request(NAS100D_PO_GPIO, "power off"); + + /* Make sure that the power button GPIO is set up as an input */ + gpio_request(NAS100D_PB_GPIO, "power button"); + gpio_direction_input(NAS100D_PB_GPIO); + + /* 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)); + + return 0; +} +device_initcall(nas100d_gpio_init); + +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_TRIGGER_LOW, "NAS100D reset button", NULL) < 0) { + + printk(KERN_DEBUG "Reset Button IRQ %d not available\n", + gpio_to_irq(NAS100D_RB_GPIO)); + } + + /* + * 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 */ + .atag_offset = 0x100, + .map_io = ixp4xx_map_io, + .init_early = ixp4xx_init_early, + .init_irq = ixp4xx_init_irq, + .init_time = ixp4xx_timer_init, + .init_machine = nas100d_init, +#if defined(CONFIG_PCI) + .dma_zone_size = SZ_64M, +#endif + .restart = ixp4xx_restart, +MACHINE_END |