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
20#include <asm/geode.h>
21
22static const struct gpio_led net5501_leds[] = {
23	{
24		.name = "error",
25		.gpio = 6,
26		.default_trigger = "default-on",
27	},
28};
29
30static struct gpio_led_platform_data net5501_leds_data = {
31	.num_leds = ARRAY_SIZE(net5501_leds),
32	.leds = net5501_leds,
33};
34
35static struct platform_device net5501_leds_dev = {
36	.name = "leds-gpio",
37	.id = -1,
38	.dev.platform_data = &net5501_leds_data,
39};
40
41static void __init init_net5501(void)
42{
43	platform_device_register(&net5501_leds_dev);
44}
45
46struct soekris_board {
47	u16	offset;
48	char	*sig;
49	u8	len;
50	void	(*init)(void);
51};
52
53static struct soekris_board __initdata boards[] = {
54	{ 0xb7b, "net5501", 7, init_net5501 },	/* net5501 v1.33/1.33c */
55	{ 0xb1f, "net5501", 7, init_net5501 },	/* net5501 v1.32i */
56};
57
58static int __init soekris_init(void)
59{
60	int i;
61	unsigned char *rombase, *bios;
62
63	if (!is_geode())
64		return 0;
65
66	rombase = ioremap(0xffff0000, 0xffff);
67	if (!rombase) {
68		printk(KERN_INFO "Soekris net5501 LED driver failed to get rombase");
69		return 0;
70	}
71
72	bios = rombase + 0x20;	/* null terminated */
73
74	if (strncmp(bios, "comBIOS", 7))
75		goto unmap;
76
77	for (i = 0; i < ARRAY_SIZE(boards); i++) {
78		unsigned char *model = rombase + boards[i].offset;
79
80		if (strncmp(model, boards[i].sig, boards[i].len) == 0) {
81			printk(KERN_INFO "Soekris %s: %s\n", model, bios);
82
83			if (boards[i].init)
84				boards[i].init();
85			break;
86		}
87	}
88
89unmap:
90	iounmap(rombase);
91	return 0;
92}
93
94arch_initcall(soekris_init);
95
96MODULE_LICENSE("GPL");