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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/leds.h>
#include <linux/mtd/physmap.h>
#include <linux/ssb/ssb.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/gpio.h>
#include <asm/mach-bcm47xx/bcm47xx.h>
/* GPIO definitions for the WGT634U */
#define WGT634U_GPIO_LED 3
#define WGT634U_GPIO_RESET 2
#define WGT634U_GPIO_TP1 7
#define WGT634U_GPIO_TP2 6
#define WGT634U_GPIO_TP3 5
#define WGT634U_GPIO_TP4 4
#define WGT634U_GPIO_TP5 1
static struct gpio_led wgt634u_leds[] = {
{
.name = "power",
.gpio = WGT634U_GPIO_LED,
.active_low = 1,
.default_trigger = "heartbeat",
},
};
static struct gpio_led_platform_data wgt634u_led_data = {
.num_leds = ARRAY_SIZE(wgt634u_leds),
.leds = wgt634u_leds,
};
static struct platform_device wgt634u_gpio_leds = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &wgt634u_led_data,
}
};
/* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U
firmware. */
static struct mtd_partition wgt634u_partitions[] = {
{
.name = "cfe",
.offset = 0,
.size = 0x60000, /* 384k */
.mask_flags = MTD_WRITEABLE /* force read-only */
},
{
.name = "config",
.offset = 0x60000,
.size = 0x20000 /* 128k */
},
{
.name = "linux",
.offset = 0x80000,
.size = 0x140000 /* 1280k */
},
{
.name = "jffs",
.offset = 0x1c0000,
.size = 0x620000 /* 6272k */
},
{
.name = "nvram",
.offset = 0x7e0000,
.size = 0x20000 /* 128k */
},
};
static struct physmap_flash_data wgt634u_flash_data = {
.parts = wgt634u_partitions,
.nr_parts = ARRAY_SIZE(wgt634u_partitions)
};
static struct resource wgt634u_flash_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device wgt634u_flash = {
.name = "physmap-flash",
.id = 0,
.dev = { .platform_data = &wgt634u_flash_data, },
.resource = &wgt634u_flash_resource,
.num_resources = 1,
};
/* Platform devices */
static struct platform_device *wgt634u_devices[] __initdata = {
&wgt634u_flash,
&wgt634u_gpio_leds,
};
static irqreturn_t gpio_interrupt(int irq, void *ignored)
{
int state;
/* Interrupts are shared, check if the current one is
a GPIO interrupt. */
if (!ssb_chipco_irq_status(&bcm47xx_bus.ssb.chipco,
SSB_CHIPCO_IRQ_GPIO))
return IRQ_NONE;
state = gpio_get_value(WGT634U_GPIO_RESET);
/* Interrupt are level triggered, revert the interrupt polarity
to clear the interrupt. */
gpio_polarity(WGT634U_GPIO_RESET, state);
if (!state) {
printk(KERN_INFO "Reset button pressed");
ctrl_alt_del();
}
return IRQ_HANDLED;
}
static int __init wgt634u_init(void)
{
/* There is no easy way to detect that we are running on a WGT634U
* machine. Use the MAC address as an heuristic. Netgear Inc. has
* been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx.
*/
u8 *et0mac;
if (bcm47xx_bus_type != BCM47XX_BUS_TYPE_SSB)
return -ENODEV;
et0mac = bcm47xx_bus.ssb.sprom.et0mac;
if (et0mac[0] == 0x00 &&
((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
(et0mac[1] == 0x0f && et0mac[2] == 0xb5))) {
struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore;
printk(KERN_INFO "WGT634U machine detected.\n");
if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET),
gpio_interrupt, IRQF_SHARED,
"WGT634U GPIO", &bcm47xx_bus.ssb.chipco)) {
gpio_direction_input(WGT634U_GPIO_RESET);
gpio_intmask(WGT634U_GPIO_RESET, 1);
ssb_chipco_irq_mask(&bcm47xx_bus.ssb.chipco,
SSB_CHIPCO_IRQ_GPIO,
SSB_CHIPCO_IRQ_GPIO);
}
wgt634u_flash_data.width = mcore->pflash.buswidth;
wgt634u_flash_resource.start = mcore->pflash.window;
wgt634u_flash_resource.end = mcore->pflash.window
+ mcore->pflash.window_size
- 1;
return platform_add_devices(wgt634u_devices,
ARRAY_SIZE(wgt634u_devices));
} else
return -ENODEV;
}
module_init(wgt634u_init);
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