#
# Copyright (C) 2007-2010 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

autoconf_bool = $(patsubst %,$(if $($(1)),--enable,--disable)-%,$(2))

# delete *.la-files from staging_dir - we can not yet remove respective lines within all package
# Makefiles, since backfire still uses libtool v1.5.x which (may) require those files
define libtool_remove_files
	find $(1) -name '*.la' | $(XARGS) rm -f;
endef


AM_TOOL_PATHS:= \
	AUTOM4TE=$(STAGING_DIR_HOST)/bin/autom4te \
	AUTOCONF=$(STAGING_DIR_HOST)/bin/autoconf \
	AUTOMAKE=$(STAGING_DIR_HOST)/bin/automake \
	ACLOCAL=$(STAGING_DIR_HOST)/bin/aclocal \
	AUTOHEADER=$(STAGING_DIR_HOST)/bin/autoheader \
	LIBTOOLIZE=$(STAGING_DIR_HOST)/bin/libtoolize \
	M4=$(STAGING_DIR_HOST)/bin/m4

# 1: build dir
# 2: remove files
# 3: automake paths
# 4: libtool paths
# 5: extra m4 dirs
define autoreconf
	(cd $(1)pre { line-height: 125%; margin: 0; }
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span.linenos { color: #000000; background-color: #f0f0f0; padding: 0 5px 0 5px; }
td.linenos pre.special { color: #000000; background-color: #ffffc0; padding: 0 5px 0 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding: 0 5px 0 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight { background: #ffffff; }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
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.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
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.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
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.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
/*
 *  Button Hotplug driver
 *
 *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
 *
 *  Based on the diag.c - GPIO interface driver for Broadcom boards
 *    Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
 *    Copyright (C) 2006-2007 Felix Fietkau <nbd@nbd.name>
 *    Copyright (C) 2008 Andy Boyett <agb@openwrt.org>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/version.h>
#include <linux/kmod.h>
#include <linux/input.h>

#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/kobject.h>

#define DRV_NAME	"button-hotplug"
#define DRV_VERSION	"0.4.1"
#define DRV_DESC	"Button Hotplug driver"

#define BH_SKB_SIZE	2048

#define PFX	DRV_NAME ": "

#undef BH_DEBUG

#ifdef BH_DEBUG
#define BH_DBG(fmt, args...) printk(KERN_DEBUG "%s: " fmt, DRV_NAME, ##args )
#else
#define BH_DBG(fmt, args...) do {} while (0)
#endif

#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, DRV_NAME, ##args )

#ifndef BIT_MASK
#define BIT_MASK(nr)            (1UL << ((nr) % BITS_PER_LONG))
#endif

struct bh_priv {
	unsigned long		*seen;
	struct input_handle	handle;
};

struct bh_event {
	const char		*name;
	char			*action;
	unsigned long		seen;

	struct sk_buff		*skb;
	struct work_struct	work;
};

struct bh_map {
	unsigned int	code;
	const char	*name;
};

extern u64 uevent_next_seqnum(void);

#define BH_MAP(_code, _name)		\
	{				\
		.code = (_code),	\
		.name = (_name),	\
	}

static struct bh_map button_map[] = {
	BH_MAP(BTN_0,		"BTN_0"),
	BH_MAP(BTN_1,		"BTN_1"),
	BH_MAP(BTN_2,		"BTN_2"),
	BH_MAP(BTN_3,		"BTN_3"),
	BH_MAP(BTN_4,		"BTN_4"),
	BH_MAP(BTN_5,		"BTN_5"),
	BH_MAP(BTN_6,		"BTN_6"),
	BH_MAP(BTN_7,		"BTN_7"),
	BH_MAP(BTN_8,		"BTN_8"),
	BH_MAP(BTN_9,		"BTN_9"),
	BH_MAP(KEY_RESTART,	"reset"),
	BH_MAP(KEY_POWER,	"power"),
	BH_MAP(KEY_POWER2,	"reboot"),
	BH_MAP(KEY_RFKILL,	"rfkill"),
	BH_MAP(KEY_WPS_BUTTON,	"wps"),
	BH_MAP(KEY_WIMAX,	"wwan"),
};

/* -------------------------------------------------------------------------*/

static int bh_event_add_var(struct bh_event *event, int argv,
		const char *format, ...)
{
	static char buf[128];
	char *s;
	va_list args;
	int len;

	if (argv)
		return 0;

	va_start(args, format);
	len = vsnprintf(buf, sizeof(buf), format, args);
	va_end(args);

	if (len >= sizeof(buf)) {
		BH_ERR("buffer size too small\n");
		WARN_ON(1);
		return -ENOMEM;
	}

	s = skb_put(event->skb, len + 1);
	strcpy(s, buf);

	BH_DBG("added variable '%s'\n", s);

	return 0;
}

static int button_hotplug_fill_event(struct bh_event *event)
{
	int ret;

	ret = bh_event_add_var(event, 0, "HOME=%s", "/");
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "PATH=%s",
					"/sbin:/bin:/usr/sbin:/usr/bin");
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "SUBSYSTEM=%s", "button");
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "ACTION=%s", event->action);
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "BUTTON=%s", event->name);
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "SEEN=%ld", event->seen);
	if (ret)
		return ret;

	ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());

	return ret;
}

static void button_hotplug_work(struct work_struct *work)
{
	struct bh_event *event = container_of(work, struct bh_event, work);
	int ret = 0;

	event->skb = alloc_skb(BH_SKB_SIZE, GFP_KERNEL);
	if (!event->skb)
		goto out_free_event;

	ret = bh_event_add_var(event, 0, "%s@", event->action);
	if (ret)
		goto out_free_skb;

	ret = button_hotplug_fill_event(event);
	if (ret)
		goto out_free_skb;

	NETLINK_CB(event->skb).dst_group = 1;
	broadcast_uevent(event->skb, 0, 1, GFP_KERNEL);

 out_free_skb:
	if (ret) {
		BH_ERR("work error %d\n", ret);
		kfree_skb(event->skb);
	}
 out_free_event:
	kfree(event);
}

static int button_hotplug_create_event(const char *name, unsigned long seen,
		int pressed)
{
	struct bh_event *event;

	BH_DBG("create event, name=%s, seen=%lu, pressed=%d\n",
		name, seen, pressed);

	event = kzalloc(sizeof(*event), GFP_KERNEL);
	if (!event)
		return -ENOMEM;

	event->name = name;
	event->seen = seen;
	event->action = pressed ? "pressed" : "released";

	INIT_WORK(&event->work, (void *)(void *)button_hotplug_work);
	schedule_work(&event->work);

	return 0;
}

/* -------------------------------------------------------------------------*/

static int button_get_index(unsigned int code)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(button_map); i++)
		if (button_map[i].code == code)
			return i;

	return -1;
}
static void button_hotplug_event(struct input_handle *handle,
			   unsigned int type, unsigned int code, int value)
{
	struct bh_priv *priv = handle->private;
	unsigned long seen = jiffies;
	int btn;

	BH_DBG("event type=%u, code=%u, value=%d\n", type, code, value);

	if (type != EV_KEY)
		return;

	btn = button_get_index(code);
	if (btn < 0)
		return;

	button_hotplug_create_event(button_map[btn].name,
			(seen - priv->seen[btn]) / HZ, value);
	priv->seen[btn] = seen;
}

static int button_hotplug_connect(struct input_handler *handler,
		struct input_dev *dev, const struct input_device_id *id)
{
	struct bh_priv *priv;
	int ret;
	int i;

	for (i = 0; i < ARRAY_SIZE(button_map); i++)
		if (test_bit(button_map[i].code, dev->keybit))
			break;

	if (i == ARRAY_SIZE(button_map))
		return -ENODEV;

	priv = kzalloc(sizeof(*priv) +
		       (sizeof(unsigned long) * ARRAY_SIZE(button_map)),
		       GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->seen = (unsigned long *) &priv[1];
	priv->handle.private = priv;
	priv->handle.dev = dev;
	priv->handle.handler = handler;
	priv->handle.name = DRV_NAME;

	ret = input_register_handle(&priv->handle);
	if (ret)
		goto err_free_priv;

	ret = input_open_device(&priv->handle);
	if (ret)
		goto err_unregister_handle;

	BH_DBG("connected to %s\n", dev->name);

	return 0;

 err_unregister_handle:
	input_unregister_handle(&priv->handle);

 err_free_priv:
	kfree(priv);
	return ret;
}

static void button_hotplug_disconnect(struct input_handle *handle)
{
	struct bh_priv *priv = handle->private;

	input_close_device(handle);
	input_unregister_handle(handle);

	kfree(priv);
}

static const struct input_device_id button_hotplug_ids[] = {
	{
                .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
                .evbit = { BIT_MASK(EV_KEY) },
        },
	{
		/* Terminating entry */
	},
};

MODULE_DEVICE_TABLE(input, button_hotplug_ids);

static struct input_handler button_hotplug_handler = {
	.event =	button_hotplug_event,
	.connect =	button_hotplug_connect,
	.disconnect =	button_hotplug_disconnect,
	.name =		DRV_NAME,
	.id_table =	button_hotplug_ids,
};

/* -------------------------------------------------------------------------*/

static int __init button_hotplug_init(void)
{
	int ret;

	printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
	ret = input_register_handler(&button_hotplug_handler);
	if (ret)
		BH_ERR("unable to register input handler\n");

	return ret;
}
module_init(button_hotplug_init);

static void __exit button_hotplug_exit(void)
{
	input_unregister_handler(&button_hotplug_handler);
}
module_exit(button_hotplug_exit);

MODULE_DESCRIPTION(DRV_DESC);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_LICENSE("GPL v2");