mirror of https://gitee.com/openkylin/linux.git
288 lines
7.2 KiB
C
288 lines
7.2 KiB
C
/*
|
|
* DSM-G600 board-setup
|
|
*
|
|
* Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
|
|
* Copyright (C) 2006 Tower Technologies
|
|
*
|
|
* based on ixdp425-setup.c:
|
|
* Copyright (C) 2003-2004 MontaVista Software, Inc.
|
|
* based on nslu2-power.c:
|
|
* Copyright (C) 2005 Tower Technologies
|
|
* based on nslu2-io.c:
|
|
* Copyright (C) 2004 Karen Spearel
|
|
*
|
|
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
|
* Author: Michael Westerhof <mwester@dls.net>
|
|
* Author: Rod Whitby <rod@whitby.id.au>
|
|
* Maintainers: http://www.nslu2-linux.org/
|
|
*/
|
|
#include <linux/gpio.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 <asm/mach-types.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/flash.h>
|
|
#include <asm/mach/time.h>
|
|
|
|
#define DSMG600_SDA_PIN 5
|
|
#define DSMG600_SCL_PIN 4
|
|
|
|
/* DSM-G600 Timer Setting */
|
|
#define DSMG600_FREQ 66000000
|
|
|
|
/* Buttons */
|
|
#define DSMG600_PB_GPIO 15 /* power button */
|
|
#define DSMG600_RB_GPIO 3 /* reset button */
|
|
|
|
/* Power control */
|
|
#define DSMG600_PO_GPIO 2 /* power off */
|
|
|
|
/* LEDs */
|
|
#define DSMG600_LED_PWR_GPIO 0
|
|
#define DSMG600_LED_WLAN_GPIO 14
|
|
|
|
static struct flash_platform_data dsmg600_flash_data = {
|
|
.map_name = "cfi_probe",
|
|
.width = 2,
|
|
};
|
|
|
|
static struct resource dsmg600_flash_resource = {
|
|
.flags = IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct platform_device dsmg600_flash = {
|
|
.name = "IXP4XX-Flash",
|
|
.id = 0,
|
|
.dev.platform_data = &dsmg600_flash_data,
|
|
.num_resources = 1,
|
|
.resource = &dsmg600_flash_resource,
|
|
};
|
|
|
|
static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
|
|
.sda_pin = DSMG600_SDA_PIN,
|
|
.scl_pin = DSMG600_SCL_PIN,
|
|
};
|
|
|
|
static struct platform_device dsmg600_i2c_gpio = {
|
|
.name = "i2c-gpio",
|
|
.id = 0,
|
|
.dev = {
|
|
.platform_data = &dsmg600_i2c_gpio_data,
|
|
},
|
|
};
|
|
|
|
static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
|
|
{
|
|
I2C_BOARD_INFO("pcf8563", 0x51),
|
|
},
|
|
};
|
|
|
|
static struct gpio_led dsmg600_led_pins[] = {
|
|
{
|
|
.name = "dsmg600:green:power",
|
|
.gpio = DSMG600_LED_PWR_GPIO,
|
|
},
|
|
{
|
|
.name = "dsmg600:green:wlan",
|
|
.gpio = DSMG600_LED_WLAN_GPIO,
|
|
.active_low = true,
|
|
},
|
|
};
|
|
|
|
static struct gpio_led_platform_data dsmg600_led_data = {
|
|
.num_leds = ARRAY_SIZE(dsmg600_led_pins),
|
|
.leds = dsmg600_led_pins,
|
|
};
|
|
|
|
static struct platform_device dsmg600_leds = {
|
|
.name = "leds-gpio",
|
|
.id = -1,
|
|
.dev.platform_data = &dsmg600_led_data,
|
|
};
|
|
|
|
static struct resource dsmg600_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 dsmg600_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 dsmg600_uart = {
|
|
.name = "serial8250",
|
|
.id = PLAT8250_DEV_PLATFORM,
|
|
.dev.platform_data = dsmg600_uart_data,
|
|
.num_resources = ARRAY_SIZE(dsmg600_uart_resources),
|
|
.resource = dsmg600_uart_resources,
|
|
};
|
|
|
|
static struct platform_device *dsmg600_devices[] __initdata = {
|
|
&dsmg600_i2c_gpio,
|
|
&dsmg600_flash,
|
|
&dsmg600_leds,
|
|
};
|
|
|
|
static void dsmg600_power_off(void)
|
|
{
|
|
/* enable the pwr cntl gpio */
|
|
gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);
|
|
|
|
/* poweroff */
|
|
gpio_line_set(DSMG600_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 dsmg600_power_handler(unsigned long data);
|
|
static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
|
|
|
|
static void dsmg600_power_handler(unsigned long data)
|
|
{
|
|
/* This routine is called twice per second to check the
|
|
* state of the power button.
|
|
*/
|
|
|
|
if (gpio_get_value(DSMG600_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(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
|
|
} else {
|
|
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
|
|
}
|
|
}
|
|
|
|
mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
|
|
}
|
|
|
|
static irqreturn_t dsmg600_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 dsmg600_timer_init(void)
|
|
{
|
|
/* The xtal on this machine is non-standard. */
|
|
ixp4xx_timer_freq = DSMG600_FREQ;
|
|
|
|
/* Call standard timer_init function. */
|
|
ixp4xx_timer_init();
|
|
}
|
|
|
|
static void __init dsmg600_init(void)
|
|
{
|
|
ixp4xx_sys_init();
|
|
|
|
/* Make sure that GPIO14 and GPIO15 are not used as clocks */
|
|
*IXP4XX_GPIO_GPCLKR = 0;
|
|
|
|
dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
|
|
dsmg600_flash_resource.end =
|
|
IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
|
|
|
|
i2c_register_board_info(0, dsmg600_i2c_board_info,
|
|
ARRAY_SIZE(dsmg600_i2c_board_info));
|
|
|
|
/* The UART is required on the DSM-G600 (Redboot cannot use the
|
|
* NIC) -- do it here so that it does *not* get removed if
|
|
* platform_add_devices fails!
|
|
*/
|
|
(void)platform_device_register(&dsmg600_uart);
|
|
|
|
platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
|
|
|
|
pm_power_off = dsmg600_power_off;
|
|
|
|
if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
|
|
IRQF_DISABLED | IRQF_TRIGGER_LOW,
|
|
"DSM-G600 reset button", NULL) < 0) {
|
|
|
|
printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
|
|
gpio_to_irq(DSMG600_RB_GPIO));
|
|
}
|
|
|
|
/* The power button on the D-Link DSM-G600 is on GPIO 15, 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(DSMG600_PB_GPIO, IXP4XX_GPIO_IN);
|
|
|
|
/* Set the initial value for the power button IRQ handler */
|
|
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
|
|
|
|
mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
|
|
}
|
|
|
|
MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
|
|
/* 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 = dsmg600_timer_init,
|
|
.init_machine = dsmg600_init,
|
|
#if defined(CONFIG_PCI)
|
|
.dma_zone_size = SZ_64M,
|
|
#endif
|
|
.restart = ixp4xx_restart,
|
|
MACHINE_END
|