1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> 7 */ 8 9#include <linux/platform_device.h> 10#include <linux/module.h> 11#include <linux/leds.h> 12#include <linux/mtd/physmap.h> 13#include <linux/ssb/ssb.h> 14#include <linux/interrupt.h> 15#include <linux/reboot.h> 16#include <linux/gpio.h> 17#include <asm/mach-bcm47xx/bcm47xx.h> 18 19/* GPIO definitions for the WGT634U */ 20#define WGT634U_GPIO_LED 3 21#define WGT634U_GPIO_RESET 2 22#define WGT634U_GPIO_TP1 7 23#define WGT634U_GPIO_TP2 6 24#define WGT634U_GPIO_TP3 5 25#define WGT634U_GPIO_TP4 4 26#define WGT634U_GPIO_TP5 1 27 28static struct gpio_led wgt634u_leds[] = { 29 { 30 .name = "power", 31 .gpio = WGT634U_GPIO_LED, 32 .active_low = 1, 33 .default_trigger = "heartbeat", 34 }, 35}; 36 37static struct gpio_led_platform_data wgt634u_led_data = { 38 .num_leds = ARRAY_SIZE(wgt634u_leds), 39 .leds = wgt634u_leds, 40}; 41 42static struct platform_device wgt634u_gpio_leds = { 43 .name = "leds-gpio", 44 .id = -1, 45 .dev = { 46 .platform_data = &wgt634u_led_data, 47 } 48}; 49 50 51/* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U 52 firmware. */ 53static struct mtd_partition wgt634u_partitions[] = { 54 { 55 .name = "cfe", 56 .offset = 0, 57 .size = 0x60000, /* 384k */ 58 .mask_flags = MTD_WRITEABLE /* force read-only */ 59 }, 60 { 61 .name = "config", 62 .offset = 0x60000, 63 .size = 0x20000 /* 128k */ 64 }, 65 { 66 .name = "linux", 67 .offset = 0x80000, 68 .size = 0x140000 /* 1280k */ 69 }, 70 { 71 .name = "jffs", 72 .offset = 0x1c0000, 73 .size = 0x620000 /* 6272k */ 74 }, 75 { 76 .name = "nvram", 77 .offset = 0x7e0000, 78 .size = 0x20000 /* 128k */ 79 }, 80}; 81 82static struct physmap_flash_data wgt634u_flash_data = { 83 .parts = wgt634u_partitions, 84 .nr_parts = ARRAY_SIZE(wgt634u_partitions) 85}; 86 87static struct resource wgt634u_flash_resource = { 88 .flags = IORESOURCE_MEM, 89}; 90 91static struct platform_device wgt634u_flash = { 92 .name = "physmap-flash", 93 .id = 0, 94 .dev = { .platform_data = &wgt634u_flash_data, }, 95 .resource = &wgt634u_flash_resource, 96 .num_resources = 1, 97}; 98 99/* Platform devices */ 100static struct platform_device *wgt634u_devices[] __initdata = { 101 &wgt634u_flash, 102 &wgt634u_gpio_leds, 103}; 104 105static irqreturn_t gpio_interrupt(int irq, void *ignored) 106{ 107 int state; 108 109 /* Interrupts are shared, check if the current one is 110 a GPIO interrupt. */ 111 if (!ssb_chipco_irq_status(&ssb_bcm47xx.chipco, 112 SSB_CHIPCO_IRQ_GPIO)) 113 return IRQ_NONE; 114 115 state = gpio_get_value(WGT634U_GPIO_RESET); 116 117 /* Interrupt are level triggered, revert the interrupt polarity 118 to clear the interrupt. */ 119 gpio_polarity(WGT634U_GPIO_RESET, state); 120 121 if (!state) { 122 printk(KERN_INFO "Reset button pressed"); 123 ctrl_alt_del(); 124 } 125 126 return IRQ_HANDLED; 127} 128 129static int __init wgt634u_init(void) 130{ 131 /* There is no easy way to detect that we are running on a WGT634U 132 * machine. Use the MAC address as an heuristic. Netgear Inc. has 133 * been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx. 134 */ 135 136 u8 *et0mac = ssb_bcm47xx.sprom.et0mac; 137 138 if (et0mac[0] == 0x00 && 139 ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) || 140 (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) { 141 struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore; 142 143 printk(KERN_INFO "WGT634U machine detected.\n"); 144 145 if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET), 146 gpio_interrupt, IRQF_SHARED, 147 "WGT634U GPIO", &ssb_bcm47xx.chipco)) { 148 gpio_direction_input(WGT634U_GPIO_RESET); 149 gpio_intmask(WGT634U_GPIO_RESET, 1); 150 ssb_chipco_irq_mask(&ssb_bcm47xx.chipco, 151 SSB_CHIPCO_IRQ_GPIO, 152 SSB_CHIPCO_IRQ_GPIO); 153 } 154 155 wgt634u_flash_data.width = mcore->flash_buswidth; 156 wgt634u_flash_resource.start = mcore->flash_window; 157 wgt634u_flash_resource.end = mcore->flash_window 158 + mcore->flash_window_size 159 - 1; 160 return platform_add_devices(wgt634u_devices, 161 ARRAY_SIZE(wgt634u_devices)); 162 } else 163 return -ENODEV; 164} 165 166module_init(wgt634u_init); 167