1 /*
2 * Soekris board support code
3 *
4 * Copyright (C) 2008-2009 Tower Technologies
5 * Written by Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15 #include <linux/string.h>
16 #include <linux/leds.h>
17 #include <linux/platform_device.h>
18 #include <linux/gpio.h>
19 #include <linux/module.h>
20
21 #include <asm/geode.h>
22
23 static const struct gpio_led net5501_leds[] = {
24 {
25 .name = "error",
26 .gpio = 6,
27 .default_trigger = "default-on",
28 },
29 };
30
31 static struct gpio_led_platform_data net5501_leds_data = {
32 .num_leds = ARRAY_SIZE(net5501_leds),
33 .leds = net5501_leds,
34 };
35
36 static struct platform_device net5501_leds_dev = {
37 .name = "leds-gpio",
38 .id = -1,
39 .dev.platform_data = &net5501_leds_data,
40 };
41
init_net5501(void)42 static void __init init_net5501(void)
43 {
44 platform_device_register(&net5501_leds_dev);
45 }
46
47 struct soekris_board {
48 u16 offset;
49 char *sig;
50 u8 len;
51 void (*init)(void);
52 };
53
54 static struct soekris_board __initdata boards[] = {
55 { 0xb7b, "net5501", 7, init_net5501 }, /* net5501 v1.33/1.33c */
56 { 0xb1f, "net5501", 7, init_net5501 }, /* net5501 v1.32i */
57 };
58
soekris_init(void)59 static int __init soekris_init(void)
60 {
61 int i;
62 unsigned char *rombase, *bios;
63
64 if (!is_geode())
65 return 0;
66
67 rombase = ioremap(0xffff0000, 0xffff);
68 if (!rombase) {
69 printk(KERN_INFO "Soekris net5501 LED driver failed to get rombase");
70 return 0;
71 }
72
73 bios = rombase + 0x20; /* null terminated */
74
75 if (strncmp(bios, "comBIOS", 7))
76 goto unmap;
77
78 for (i = 0; i < ARRAY_SIZE(boards); i++) {
79 unsigned char *model = rombase + boards[i].offset;
80
81 if (strncmp(model, boards[i].sig, boards[i].len) == 0) {
82 printk(KERN_INFO "Soekris %s: %s\n", model, bios);
83
84 if (boards[i].init)
85 boards[i].init();
86 break;
87 }
88 }
89
90 unmap:
91 iounmap(rombase);
92 return 0;
93 }
94
95 arch_initcall(soekris_init);
96
97 MODULE_LICENSE("GPL");
98