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21c854dc AJ |
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> | |
0788150e | 12 | #include <linux/mtd/physmap.h> |
21c854dc | 13 | #include <linux/ssb/ssb.h> |
89f8c04a AJ |
14 | #include <linux/interrupt.h> |
15 | #include <linux/reboot.h> | |
16 | #include <linux/gpio.h> | |
21c854dc AJ |
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 | ||
28 | static 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 | ||
37 | static struct gpio_led_platform_data wgt634u_led_data = { | |
38 | .num_leds = ARRAY_SIZE(wgt634u_leds), | |
39 | .leds = wgt634u_leds, | |
40 | }; | |
41 | ||
42 | static struct platform_device wgt634u_gpio_leds = { | |
43 | .name = "leds-gpio", | |
44 | .id = -1, | |
45 | .dev = { | |
46 | .platform_data = &wgt634u_led_data, | |
47 | } | |
48 | }; | |
49 | ||
0788150e AJ |
50 | |
51 | /* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U | |
52 | firmware. */ | |
53 | static 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 | ||
82 | static struct physmap_flash_data wgt634u_flash_data = { | |
83 | .parts = wgt634u_partitions, | |
84 | .nr_parts = ARRAY_SIZE(wgt634u_partitions) | |
85 | }; | |
86 | ||
87 | static struct resource wgt634u_flash_resource = { | |
88 | .flags = IORESOURCE_MEM, | |
89 | }; | |
90 | ||
91 | static 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 */ | |
100 | static struct platform_device *wgt634u_devices[] __initdata = { | |
101 | &wgt634u_flash, | |
102 | &wgt634u_gpio_leds, | |
103 | }; | |
104 | ||
89f8c04a AJ |
105 | static 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 | ||
21c854dc AJ |
129 | static 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 | ||
cc2d6f70 | 136 | u8 *et0mac = ssb_bcm47xx.sprom.et0mac; |
21c854dc AJ |
137 | |
138 | if (et0mac[0] == 0x00 && | |
139 | ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) || | |
0788150e AJ |
140 | (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) { |
141 | struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore; | |
91a385b8 AJ |
142 | |
143 | printk(KERN_INFO "WGT634U machine detected.\n"); | |
144 | ||
89f8c04a AJ |
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 | ||
0788150e AJ |
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 | |
21c854dc AJ |
163 | return -ENODEV; |
164 | } | |
165 | ||
166 | module_init(wgt634u_init); | |
167 |