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
6 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
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/ssb/ssb_embedded.h>
15 #include <linux/interrupt.h>
16 #include <linux/reboot.h>
17 #include <linux/gpio.h>
18 #include <asm/mach-bcm47xx/bcm47xx.h>
20 /* GPIO definitions for the WGT634U */
21 #define WGT634U_GPIO_LED 3
22 #define WGT634U_GPIO_RESET 2
23 #define WGT634U_GPIO_TP1 7
24 #define WGT634U_GPIO_TP2 6
25 #define WGT634U_GPIO_TP3 5
26 #define WGT634U_GPIO_TP4 4
27 #define WGT634U_GPIO_TP5 1
29 static struct gpio_led wgt634u_leds
[] = {
32 .gpio
= WGT634U_GPIO_LED
,
34 .default_trigger
= "heartbeat",
38 static struct gpio_led_platform_data wgt634u_led_data
= {
39 .num_leds
= ARRAY_SIZE(wgt634u_leds
),
43 static struct platform_device wgt634u_gpio_leds
= {
47 .platform_data
= &wgt634u_led_data
,
52 /* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U
54 static struct mtd_partition wgt634u_partitions
[] = {
58 .size
= 0x60000, /* 384k */
59 .mask_flags
= MTD_WRITEABLE
/* force read-only */
64 .size
= 0x20000 /* 128k */
69 .size
= 0x140000 /* 1280k */
74 .size
= 0x620000 /* 6272k */
79 .size
= 0x20000 /* 128k */
83 static struct physmap_flash_data wgt634u_flash_data
= {
84 .parts
= wgt634u_partitions
,
85 .nr_parts
= ARRAY_SIZE(wgt634u_partitions
)
88 static struct resource wgt634u_flash_resource
= {
89 .flags
= IORESOURCE_MEM
,
92 static struct platform_device wgt634u_flash
= {
93 .name
= "physmap-flash",
95 .dev
= { .platform_data
= &wgt634u_flash_data
, },
96 .resource
= &wgt634u_flash_resource
,
100 /* Platform devices */
101 static struct platform_device
*wgt634u_devices
[] __initdata
= {
106 static irqreturn_t
gpio_interrupt(int irq
, void *ignored
)
110 /* Interrupts are shared, check if the current one is
112 if (!ssb_chipco_irq_status(&bcm47xx_bus
.ssb
.chipco
,
113 SSB_CHIPCO_IRQ_GPIO
))
116 state
= gpio_get_value(WGT634U_GPIO_RESET
);
118 /* Interrupt are level triggered, revert the interrupt polarity
119 to clear the interrupt. */
120 ssb_gpio_polarity(&bcm47xx_bus
.ssb
, 1 << WGT634U_GPIO_RESET
,
121 state
? 1 << WGT634U_GPIO_RESET
: 0);
124 printk(KERN_INFO
"Reset button pressed");
131 static int __init
wgt634u_init(void)
133 /* There is no easy way to detect that we are running on a WGT634U
134 * machine. Use the MAC address as an heuristic. Netgear Inc. has
135 * been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx.
139 if (bcm47xx_bus_type
!= BCM47XX_BUS_TYPE_SSB
)
142 et0mac
= bcm47xx_bus
.ssb
.sprom
.et0mac
;
144 if (et0mac
[0] == 0x00 &&
145 ((et0mac
[1] == 0x09 && et0mac
[2] == 0x5b) ||
146 (et0mac
[1] == 0x0f && et0mac
[2] == 0xb5))) {
147 struct ssb_mipscore
*mcore
= &bcm47xx_bus
.ssb
.mipscore
;
149 printk(KERN_INFO
"WGT634U machine detected.\n");
151 if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET
),
152 gpio_interrupt
, IRQF_SHARED
,
153 "WGT634U GPIO", &bcm47xx_bus
.ssb
.chipco
)) {
154 gpio_direction_input(WGT634U_GPIO_RESET
);
155 ssb_gpio_intmask(&bcm47xx_bus
.ssb
,
156 1 << WGT634U_GPIO_RESET
,
157 1 << WGT634U_GPIO_RESET
);
158 ssb_chipco_irq_mask(&bcm47xx_bus
.ssb
.chipco
,
160 SSB_CHIPCO_IRQ_GPIO
);
163 wgt634u_flash_data
.width
= mcore
->flash_buswidth
;
164 wgt634u_flash_resource
.start
= mcore
->flash_window
;
165 wgt634u_flash_resource
.end
= mcore
->flash_window
166 + mcore
->flash_window_size
168 return platform_add_devices(wgt634u_devices
,
169 ARRAY_SIZE(wgt634u_devices
));
174 module_init(wgt634u_init
);