diff options
Diffstat (limited to 'kernel/arch/arm/mach-ixp4xx/nslu2-setup.c')
| -rw-r--r-- | kernel/arch/arm/mach-ixp4xx/nslu2-setup.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c b/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c new file mode 100644 index 000000000..88c025f52 --- /dev/null +++ b/kernel/arch/arm/mach-ixp4xx/nslu2-setup.c @@ -0,0 +1,313 @@ +/* + * arch/arm/mach-ixp4xx/nslu2-setup.c + * + * NSLU2 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 nslu2-power.c: + * Copyright (C) 2005 Tower Technologies + * + * Author: Mark Rakes <mrakes at mac.com> + * Author: Rod Whitby <rod@whitby.id.au> + * Author: Alessandro Zummo <a.zummo@towertech.it> + * Maintainers: http://www.nslu2-linux.org/ + * + */ +#include <linux/gpio.h> +#include <linux/if_ether.h> +#include <linux/irq.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/mach/time.h> + +#define NSLU2_SDA_PIN 7 +#define NSLU2_SCL_PIN 6 + +/* NSLU2 Timer */ +#define NSLU2_FREQ 66000000 + +/* Buttons */ +#define NSLU2_PB_GPIO 5 /* power button */ +#define NSLU2_PO_GPIO 8 /* power off */ +#define NSLU2_RB_GPIO 12 /* reset button */ + +/* Buzzer */ +#define NSLU2_GPIO_BUZZ 4 + +/* LEDs */ +#define NSLU2_LED_RED_GPIO 0 +#define NSLU2_LED_GRN_GPIO 1 +#define NSLU2_LED_DISK1_GPIO 3 +#define NSLU2_LED_DISK2_GPIO 2 + +static struct flash_platform_data nslu2_flash_data = { + .map_name = "cfi_probe", + .width = 2, +}; + +static struct resource nslu2_flash_resource = { + .flags = IORESOURCE_MEM, +}; + +static struct platform_device nslu2_flash = { + .name = "IXP4XX-Flash", + .id = 0, + .dev.platform_data = &nslu2_flash_data, + .num_resources = 1, + .resource = &nslu2_flash_resource, +}; + +static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = { + .sda_pin = NSLU2_SDA_PIN, + .scl_pin = NSLU2_SCL_PIN, +}; + +static struct i2c_board_info __initdata nslu2_i2c_board_info [] = { + { + I2C_BOARD_INFO("x1205", 0x6f), + }, +}; + +static struct gpio_led nslu2_led_pins[] = { + { + .name = "nslu2:green:ready", + .gpio = NSLU2_LED_GRN_GPIO, + }, + { + .name = "nslu2:red:status", + .gpio = NSLU2_LED_RED_GPIO, + }, + { + .name = "nslu2:green:disk-1", + .gpio = NSLU2_LED_DISK1_GPIO, + .active_low = true, + }, + { + .name = "nslu2:green:disk-2", + .gpio = NSLU2_LED_DISK2_GPIO, + .active_low = true, + }, +}; + +static struct gpio_led_platform_data nslu2_led_data = { + .num_leds = ARRAY_SIZE(nslu2_led_pins), + .leds = nslu2_led_pins, +}; + +static struct platform_device nslu2_leds = { + .name = "leds-gpio", + .id = -1, + .dev.platform_data = &nslu2_led_data, +}; + +static struct platform_device nslu2_i2c_gpio = { + .name = "i2c-gpio", + .id = 0, + .dev = { + .platform_data = &nslu2_i2c_gpio_data, + }, +}; + +static struct platform_device nslu2_beeper = { + .name = "ixp4xx-beeper", + .id = NSLU2_GPIO_BUZZ, + .num_resources = 0, +}; + +static struct resource nslu2_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 nslu2_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 nslu2_uart = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev.platform_data = nslu2_uart_data, + .num_resources = 2, + .resource = nslu2_uart_resources, +}; + +/* Built-in 10/100 Ethernet MAC interfaces */ +static struct eth_plat_info nslu2_plat_eth[] = { + { + .phy = 1, + .rxq = 3, + .txreadyq = 20, + } +}; + +static struct platform_device nslu2_eth[] = { + { + .name = "ixp4xx_eth", + .id = IXP4XX_ETH_NPEB, + .dev.platform_data = nslu2_plat_eth, + } +}; + +static struct platform_device *nslu2_devices[] __initdata = { + &nslu2_i2c_gpio, + &nslu2_flash, + &nslu2_beeper, + &nslu2_leds, + &nslu2_eth[0], +}; + +static void nslu2_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(NSLU2_PO_GPIO, 1); +} + +static irqreturn_t nslu2_power_handler(int irq, void *dev_id) +{ + /* Signal init to do the ctrlaltdel action, this will bypass init if + * it hasn't started and do a kernel_restart. + */ + ctrl_alt_del(); + + return IRQ_HANDLED; +} + +static irqreturn_t nslu2_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 nslu2_gpio_init(void) +{ + if (!machine_is_nslu2()) + return 0; + + /* Request the power off GPIO */ + return gpio_request(NSLU2_PO_GPIO, "power off"); +} +device_initcall(nslu2_gpio_init); + +static void __init nslu2_timer_init(void) +{ + /* The xtal on this machine is non-standard. */ + ixp4xx_timer_freq = NSLU2_FREQ; + + /* Call standard timer_init function. */ + ixp4xx_timer_init(); +} + +static void __init nslu2_init(void) +{ + uint8_t __iomem *f; + int i; + + ixp4xx_sys_init(); + + nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); + nslu2_flash_resource.end = + IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; + + i2c_register_board_info(0, nslu2_i2c_board_info, + ARRAY_SIZE(nslu2_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(&nslu2_uart); + + platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices)); + + pm_power_off = nslu2_power_off; + + if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler, + IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) { + + printk(KERN_DEBUG "Reset Button IRQ %d not available\n", + gpio_to_irq(NSLU2_RB_GPIO)); + } + + if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler, + IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) { + + printk(KERN_DEBUG "Power Button IRQ %d not available\n", + gpio_to_irq(NSLU2_PB_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), 0x40000); + if (f) { + for (i = 0; i < 6; i++) +#ifdef __ARMEB__ + nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i); +#else + nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3)); +#endif + iounmap(f); + } + printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n", + nslu2_plat_eth[0].hwaddr); + +} + +MACHINE_START(NSLU2, "Linksys NSLU2") + /* 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 = nslu2_timer_init, + .init_machine = nslu2_init, +#if defined(CONFIG_PCI) + .dma_zone_size = SZ_64M, +#endif + .restart = ixp4xx_restart, +MACHINE_END |