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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> |
2da4c74d | 14 | #include <linux/ssb/ssb_embedded.h> |
89f8c04a AJ |
15 | #include <linux/interrupt.h> |
16 | #include <linux/reboot.h> | |
17 | #include <linux/gpio.h> | |
21c854dc AJ |
18 | #include <asm/mach-bcm47xx/bcm47xx.h> |
19 | ||
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 | |
28 | ||
29 | static struct gpio_led wgt634u_leds[] = { | |
30 | { | |
31 | .name = "power", | |
32 | .gpio = WGT634U_GPIO_LED, | |
33 | .active_low = 1, | |
34 | .default_trigger = "heartbeat", | |
35 | }, | |
36 | }; | |
37 | ||
38 | static struct gpio_led_platform_data wgt634u_led_data = { | |
70342287 RB |
39 | .num_leds = ARRAY_SIZE(wgt634u_leds), |
40 | .leds = wgt634u_leds, | |
21c854dc AJ |
41 | }; |
42 | ||
43 | static struct platform_device wgt634u_gpio_leds = { | |
70342287 RB |
44 | .name = "leds-gpio", |
45 | .id = -1, | |
21c854dc AJ |
46 | .dev = { |
47 | .platform_data = &wgt634u_led_data, | |
48 | } | |
49 | }; | |
50 | ||
0788150e AJ |
51 | |
52 | /* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U | |
53 | firmware. */ | |
54 | static struct mtd_partition wgt634u_partitions[] = { | |
55 | { | |
70342287 RB |
56 | .name = "cfe", |
57 | .offset = 0, | |
58 | .size = 0x60000, /* 384k */ | |
59 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
0788150e AJ |
60 | }, |
61 | { | |
70342287 | 62 | .name = "config", |
0788150e | 63 | .offset = 0x60000, |
70342287 | 64 | .size = 0x20000 /* 128k */ |
0788150e AJ |
65 | }, |
66 | { | |
70342287 | 67 | .name = "linux", |
0788150e | 68 | .offset = 0x80000, |
70342287 | 69 | .size = 0x140000 /* 1280k */ |
0788150e AJ |
70 | }, |
71 | { | |
70342287 | 72 | .name = "jffs", |
0788150e | 73 | .offset = 0x1c0000, |
70342287 | 74 | .size = 0x620000 /* 6272k */ |
0788150e AJ |
75 | }, |
76 | { | |
70342287 | 77 | .name = "nvram", |
0788150e | 78 | .offset = 0x7e0000, |
70342287 | 79 | .size = 0x20000 /* 128k */ |
0788150e AJ |
80 | }, |
81 | }; | |
82 | ||
83 | static struct physmap_flash_data wgt634u_flash_data = { | |
70342287 | 84 | .parts = wgt634u_partitions, |
0788150e AJ |
85 | .nr_parts = ARRAY_SIZE(wgt634u_partitions) |
86 | }; | |
87 | ||
88 | static struct resource wgt634u_flash_resource = { | |
89 | .flags = IORESOURCE_MEM, | |
90 | }; | |
91 | ||
92 | static struct platform_device wgt634u_flash = { | |
70342287 RB |
93 | .name = "physmap-flash", |
94 | .id = 0, | |
95 | .dev = { .platform_data = &wgt634u_flash_data, }, | |
0788150e AJ |
96 | .resource = &wgt634u_flash_resource, |
97 | .num_resources = 1, | |
98 | }; | |
99 | ||
100 | /* Platform devices */ | |
101 | static struct platform_device *wgt634u_devices[] __initdata = { | |
102 | &wgt634u_flash, | |
103 | &wgt634u_gpio_leds, | |
104 | }; | |
105 | ||
89f8c04a AJ |
106 | static irqreturn_t gpio_interrupt(int irq, void *ignored) |
107 | { | |
108 | int state; | |
109 | ||
110 | /* Interrupts are shared, check if the current one is | |
111 | a GPIO interrupt. */ | |
08ccf572 | 112 | if (!ssb_chipco_irq_status(&bcm47xx_bus.ssb.chipco, |
89f8c04a AJ |
113 | SSB_CHIPCO_IRQ_GPIO)) |
114 | return IRQ_NONE; | |
115 | ||
116 | state = gpio_get_value(WGT634U_GPIO_RESET); | |
117 | ||
118 | /* Interrupt are level triggered, revert the interrupt polarity | |
119 | to clear the interrupt. */ | |
2da4c74d HM |
120 | ssb_gpio_polarity(&bcm47xx_bus.ssb, 1 << WGT634U_GPIO_RESET, |
121 | state ? 1 << WGT634U_GPIO_RESET : 0); | |
89f8c04a AJ |
122 | |
123 | if (!state) { | |
124 | printk(KERN_INFO "Reset button pressed"); | |
125 | ctrl_alt_del(); | |
126 | } | |
127 | ||
128 | return IRQ_HANDLED; | |
129 | } | |
130 | ||
21c854dc AJ |
131 | static int __init wgt634u_init(void) |
132 | { | |
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. | |
136 | */ | |
08ccf572 | 137 | u8 *et0mac; |
21c854dc | 138 | |
08ccf572 HM |
139 | if (bcm47xx_bus_type != BCM47XX_BUS_TYPE_SSB) |
140 | return -ENODEV; | |
141 | ||
142 | et0mac = bcm47xx_bus.ssb.sprom.et0mac; | |
21c854dc AJ |
143 | |
144 | if (et0mac[0] == 0x00 && | |
145 | ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) || | |
0788150e | 146 | (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) { |
08ccf572 | 147 | struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore; |
91a385b8 AJ |
148 | |
149 | printk(KERN_INFO "WGT634U machine detected.\n"); | |
150 | ||
89f8c04a AJ |
151 | if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET), |
152 | gpio_interrupt, IRQF_SHARED, | |
08ccf572 | 153 | "WGT634U GPIO", &bcm47xx_bus.ssb.chipco)) { |
89f8c04a | 154 | gpio_direction_input(WGT634U_GPIO_RESET); |
2da4c74d HM |
155 | ssb_gpio_intmask(&bcm47xx_bus.ssb, |
156 | 1 << WGT634U_GPIO_RESET, | |
157 | 1 << WGT634U_GPIO_RESET); | |
08ccf572 | 158 | ssb_chipco_irq_mask(&bcm47xx_bus.ssb.chipco, |
89f8c04a AJ |
159 | SSB_CHIPCO_IRQ_GPIO, |
160 | SSB_CHIPCO_IRQ_GPIO); | |
161 | } | |
162 | ||
54c97498 HM |
163 | wgt634u_flash_data.width = mcore->pflash.buswidth; |
164 | wgt634u_flash_resource.start = mcore->pflash.window; | |
165 | wgt634u_flash_resource.end = mcore->pflash.window | |
166 | + mcore->pflash.window_size | |
0788150e AJ |
167 | - 1; |
168 | return platform_add_devices(wgt634u_devices, | |
169 | ARRAY_SIZE(wgt634u_devices)); | |
170 | } else | |
21c854dc AJ |
171 | return -ENODEV; |
172 | } | |
173 | ||
174 | module_init(wgt634u_init); |