diff options
Diffstat (limited to 'arch/mips/bcm47xx/wgt634u.c')
| -rw-r--r-- | arch/mips/bcm47xx/wgt634u.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/mips/bcm47xx/wgt634u.c b/arch/mips/bcm47xx/wgt634u.c new file mode 100644 index 00000000..e9f9ec8d --- /dev/null +++ b/arch/mips/bcm47xx/wgt634u.c @@ -0,0 +1,170 @@ +/* + * 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->flash_buswidth; + wgt634u_flash_resource.start = mcore->flash_window; + wgt634u_flash_resource.end = mcore->flash_window + + mcore->flash_window_size + - 1; + return platform_add_devices(wgt634u_devices, + ARRAY_SIZE(wgt634u_devices)); + } else + return -ENODEV; +} + +module_init(wgt634u_init); |