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// SPDX-License-Identifier: GPL-2.0-only
/*
* System Specific setup for Soekris net5501
* At the moment this means setup of GPIO control of LEDs and buttons
* on net5501 boards.
*
* Copyright (C) 2008-2009 Tower Technologies
* Written by Alessandro Zummo <a.zummo@towertech.it>
*
* Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
* Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
* and Philip Prindeville <philipp@redfish-solutions.com>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/string.h>
#include <linux/input.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/property.h>
#include <asm/geode.h>
#include "geode-common.h"
#define BIOS_REGION_BASE 0xffff0000
#define BIOS_REGION_SIZE 0x00010000
static const struct geode_led net5501_leds[] __initconst = {
{ 6, true },
};
static void __init register_net5501(void)
{
geode_create_restart_key(24);
geode_create_leds("net5501", net5501_leds, ARRAY_SIZE(net5501_leds));
}
struct net5501_board {
u16 offset;
u16 len;
char *sig;
};
static struct net5501_board __initdata boards[] = {
{ 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
{ 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
};
static bool __init net5501_present(void)
{
int i;
unsigned char *rombase, *bios;
bool found = false;
rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
if (!rombase) {
printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
return found;
}
bios = rombase + 0x20; /* null terminated */
if (memcmp(bios, "comBIOS", 7))
goto unmap;
for (i = 0; i < ARRAY_SIZE(boards); i++) {
unsigned char *model = rombase + boards[i].offset;
if (!memcmp(model, boards[i].sig, boards[i].len)) {
printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
KBUILD_MODNAME, model);
found = true;
break;
}
}
unmap:
iounmap(rombase);
return found;
}
static int __init net5501_init(void)
{
if (!is_geode())
return 0;
if (!net5501_present())
return 0;
register_net5501();
return 0;
}
device_initcall(net5501_init);
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