forked from Minki/linux
326 lines
7.9 KiB
C
326 lines
7.9 KiB
C
/*
|
|
* 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,
|
|
#if defined(CONFIG_PCI)
|
|
.dma_zone_size = SZ_64M,
|
|
#endif
|
|
MACHINE_END
|