314 lines
7 KiB
C
314 lines
7 KiB
C
|
/*
|
||
|
|
* 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
|