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+/*
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+ * System Specific setup for Soekris net5501
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+ * At the moment this means setup of GPIO control of LEDs and buttons
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+ * on net5501 boards.
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+ *
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+ *
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+ * Copyright (C) 2008-2009 Tower Technologies
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+ * Written by Alessandro Zummo <a.zummo@towertech.it>
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+ *
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+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
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+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
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+ * and Philip Prindeville <philipp@redfish-solutions.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2
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+ * as published by the Free Software Foundation.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/io.h>
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+#include <linux/string.h>
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+#include <linux/module.h>
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+#include <linux/leds.h>
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+#include <linux/platform_device.h>
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+#include <linux/gpio.h>
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+#include <linux/input.h>
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+#include <linux/gpio_keys.h>
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+
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+#include <asm/geode.h>
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+
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+#define BIOS_REGION_BASE 0xffff0000
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+#define BIOS_REGION_SIZE 0x00010000
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+
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+static struct gpio_keys_button net5501_gpio_buttons[] = {
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+ {
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+ .code = KEY_RESTART,
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+ .gpio = 24,
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+ .active_low = 1,
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+ .desc = "Reset button",
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+ .type = EV_KEY,
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+ .wakeup = 0,
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+ .debounce_interval = 100,
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+ .can_disable = 0,
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+ }
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+};
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+static struct gpio_keys_platform_data net5501_buttons_data = {
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+ .buttons = net5501_gpio_buttons,
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+ .nbuttons = ARRAY_SIZE(net5501_gpio_buttons),
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+ .poll_interval = 20,
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+};
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+
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+static struct platform_device net5501_buttons_dev = {
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+ .name = "gpio-keys-polled",
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+ .id = 1,
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+ .dev = {
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+ .platform_data = &net5501_buttons_data,
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+ }
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+};
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+
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+static struct gpio_led net5501_leds[] = {
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+ {
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+ .name = "net5501:1",
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+ .gpio = 6,
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+ .default_trigger = "default-on",
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+ .active_low = 1,
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+ },
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+};
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+
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+static struct gpio_led_platform_data net5501_leds_data = {
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+ .num_leds = ARRAY_SIZE(net5501_leds),
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+ .leds = net5501_leds,
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+};
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+
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+static struct platform_device net5501_leds_dev = {
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+ .name = "leds-gpio",
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+ .id = -1,
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+ .dev.platform_data = &net5501_leds_data,
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+};
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+
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+static struct __initdata platform_device *net5501_devs[] = {
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+ &net5501_buttons_dev,
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+ &net5501_leds_dev,
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+};
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+
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+static void __init register_net5501(void)
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+{
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+ /* Setup LED control through leds-gpio driver */
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+ platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
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+}
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+
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+struct net5501_board {
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+ u16 offset;
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+ u16 len;
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+ char *sig;
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+};
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+
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+static struct net5501_board __initdata boards[] = {
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+ { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
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+ { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
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+};
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+
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+static bool __init net5501_present(void)
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+{
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+ int i;
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+ unsigned char *rombase, *bios;
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+ bool found = false;
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+
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+ rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
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+ if (!rombase) {
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+ printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
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+ return found;
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+ }
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+
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+ bios = rombase + 0x20; /* null terminated */
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+
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+ if (memcmp(bios, "comBIOS", 7))
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+ goto unmap;
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+
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+ for (i = 0; i < ARRAY_SIZE(boards); i++) {
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+ unsigned char *model = rombase + boards[i].offset;
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+
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+ if (!memcmp(model, boards[i].sig, boards[i].len)) {
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+ printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
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+ KBUILD_MODNAME, model);
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+
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+ found = true;
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+ break;
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+ }
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+ }
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+
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+unmap:
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+ iounmap(rombase);
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+ return found;
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+}
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+
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+static int __init net5501_init(void)
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+{
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+ if (!is_geode())
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+ return 0;
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+
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+ if (!net5501_present())
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+ return 0;
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+
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+ register_net5501();
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+
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+ return 0;
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+}
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+
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+module_init(net5501_init);
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+
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+MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
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+MODULE_DESCRIPTION("Soekris net5501 System Setup");
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+MODULE_LICENSE("GPL");
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Philip Prindeville