373 lines
8.9 KiB
Diff
373 lines
8.9 KiB
Diff
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Submitted By: Mario Fetka (mario dot fetka at gmail dot com)
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Date: 2012-11-18
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Initial Package Version: 3.2.33
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Origin: openwtr.org packages/system/button-hotplug
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Upstream Status: unknown
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Description: create uevents from button usage
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diff -Naur linux-3.2.33-go.orig/3rdparty/button_hotplug/Kconfig 3rdparty/button_hotplug/Kconfig
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--- linux-3.2.33-go.orig/3rdparty/button_hotplug/Kconfig 1970-01-01 00:00:00.000000000 +0000
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+++ 3rdparty/button_hotplug/Kconfig 2012-11-18 14:45:26.000000000 +0000
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@@ -0,0 +1,2 @@
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+config BUTTON_HOTPLUG
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+ tristate "Button Hotplug driver"
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diff -Naur linux-3.2.33-go.orig/3rdparty/button_hotplug/Makefile 3rdparty/button_hotplug/Makefile
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--- linux-3.2.33-go.orig/3rdparty/button_hotplug/Makefile 1970-01-01 00:00:00.000000000 +0000
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+++ 3rdparty/button_hotplug/Makefile 2012-11-18 14:45:26.000000000 +0000
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@@ -0,0 +1 @@
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+obj-${CONFIG_BUTTON_HOTPLUG} += button-hotplug.o
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\ No newline at end of file
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diff -Naur linux-3.2.33-go.orig/3rdparty/button_hotplug/button-hotplug.c 3rdparty/button_hotplug/button-hotplug.c
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--- linux-3.2.33-go.orig/3rdparty/button_hotplug/button-hotplug.c 1970-01-01 00:00:00.000000000 +0000
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+++ 3rdparty/button_hotplug/button-hotplug.c 2012-11-18 14:45:26.000000000 +0000
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@@ -0,0 +1,349 @@
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+/*
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+ * Button Hotplug driver
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+ *
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+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
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+ *
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+ * Based on the diag.c - GPIO interface driver for Broadcom boards
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+ * Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
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+ * Copyright (C) 2006-2007 Felix Fietkau <nbd@openwrt.org>
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+ * Copyright (C) 2008 Andy Boyett <agb@openwrt.org>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/version.h>
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+#include <linux/kmod.h>
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+#include <linux/input.h>
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+
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+#include <linux/workqueue.h>
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+#include <linux/skbuff.h>
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+#include <linux/netlink.h>
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+#include <linux/kobject.h>
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+
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+#define DRV_NAME "button-hotplug"
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+#define DRV_VERSION "0.4.1"
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+#define DRV_DESC "Button Hotplug driver"
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+
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+#define BH_SKB_SIZE 2048
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+
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+#define PFX DRV_NAME ": "
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+
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+#undef BH_DEBUG
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+
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+#ifdef BH_DEBUG
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+#define BH_DBG(fmt, args...) printk(KERN_DEBUG "%s: " fmt, DRV_NAME, ##args )
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+#else
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+#define BH_DBG(fmt, args...) do {} while (0)
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+#endif
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+
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+#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, DRV_NAME, ##args )
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+
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+#ifndef BIT_MASK
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+#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
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+#endif
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+
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+struct bh_priv {
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+ unsigned long *seen;
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+ struct input_handle handle;
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+};
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+
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+struct bh_event {
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+ const char *name;
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+ char *action;
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+ unsigned long seen;
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+
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+ struct sk_buff *skb;
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+ struct work_struct work;
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+};
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+
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+struct bh_map {
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+ unsigned int code;
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+ const char *name;
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+};
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+
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+extern u64 uevent_next_seqnum(void);
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+
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+#define BH_MAP(_code, _name) \
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+ { \
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+ .code = (_code), \
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+ .name = (_name), \
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+ }
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+
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+static struct bh_map button_map[] = {
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+ BH_MAP(BTN_0, "BTN_0"),
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+ BH_MAP(BTN_1, "BTN_1"),
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+ BH_MAP(BTN_2, "BTN_2"),
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+ BH_MAP(BTN_3, "BTN_3"),
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+ BH_MAP(BTN_4, "BTN_4"),
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+ BH_MAP(BTN_5, "BTN_5"),
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+ BH_MAP(BTN_6, "BTN_6"),
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+ BH_MAP(BTN_7, "BTN_7"),
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+ BH_MAP(BTN_8, "BTN_8"),
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+ BH_MAP(BTN_9, "BTN_9"),
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+ BH_MAP(KEY_RESTART, "reset"),
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+#ifdef KEY_WPS_BUTTON
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+ BH_MAP(KEY_WPS_BUTTON, "wps"),
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+#endif /* KEY_WPS_BUTTON */
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+};
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+
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+/* -------------------------------------------------------------------------*/
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+
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+static int bh_event_add_var(struct bh_event *event, int argv,
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+ const char *format, ...)
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+{
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+ static char buf[128];
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+ char *s;
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+ va_list args;
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+ int len;
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+
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+ if (argv)
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+ return 0;
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+
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+ va_start(args, format);
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+ len = vsnprintf(buf, sizeof(buf), format, args);
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+ va_end(args);
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+
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+ if (len >= sizeof(buf)) {
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+ BH_ERR("buffer size too small\n");
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+ WARN_ON(1);
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+ return -ENOMEM;
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+ }
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+
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+ s = skb_put(event->skb, len + 1);
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+ strcpy(s, buf);
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+
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+ BH_DBG("added variable '%s'\n", s);
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+
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+ return 0;
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+}
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+
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+static int button_hotplug_fill_event(struct bh_event *event)
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+{
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+ int ret;
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+
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+ ret = bh_event_add_var(event, 0, "HOME=%s", "/");
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "PATH=%s",
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+ "/sbin:/bin:/usr/sbin:/usr/bin");
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "SUBSYSTEM=%s", "button");
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "ACTION=%s", event->action);
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "BUTTON=%s", event->name);
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "SEEN=%ld", event->seen);
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+ if (ret)
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+ return ret;
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+
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+ ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());
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+
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+ return ret;
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+}
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+
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+static void button_hotplug_work(struct work_struct *work)
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+{
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+ struct bh_event *event = container_of(work, struct bh_event, work);
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+ int ret = 0;
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+
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+ event->skb = alloc_skb(BH_SKB_SIZE, GFP_KERNEL);
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+ if (!event->skb)
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+ goto out_free_event;
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+
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+ ret = bh_event_add_var(event, 0, "%s@", event->action);
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+ if (ret)
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+ goto out_free_skb;
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+
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+ ret = button_hotplug_fill_event(event);
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+ if (ret)
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+ goto out_free_skb;
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+
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+ NETLINK_CB(event->skb).dst_group = 1;
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+ broadcast_uevent(event->skb, 0, 1, GFP_KERNEL);
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+
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+ out_free_skb:
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+ if (ret) {
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+ BH_ERR("work error %d\n", ret);
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+ kfree_skb(event->skb);
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+ }
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+ out_free_event:
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+ kfree(event);
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+}
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+
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+static int button_hotplug_create_event(const char *name, unsigned long seen,
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+ int pressed)
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+{
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+ struct bh_event *event;
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+
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+ BH_DBG("create event, name=%s, seen=%lu, pressed=%d\n",
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+ name, seen, pressed);
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+
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+ event = kzalloc(sizeof(*event), GFP_KERNEL);
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+ if (!event)
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+ return -ENOMEM;
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+
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+ event->name = name;
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+ event->seen = seen;
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+ event->action = pressed ? "pressed" : "released";
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+
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+ INIT_WORK(&event->work, (void *)(void *)button_hotplug_work);
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+ schedule_work(&event->work);
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+
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+ return 0;
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+}
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+
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+/* -------------------------------------------------------------------------*/
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+
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+#ifdef CONFIG_HOTPLUG
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+static int button_get_index(unsigned int code)
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+{
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(button_map); i++)
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+ if (button_map[i].code == code)
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+ return i;
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+
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+ return -1;
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+}
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+static void button_hotplug_event(struct input_handle *handle,
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+ unsigned int type, unsigned int code, int value)
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+{
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+ struct bh_priv *priv = handle->private;
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+ unsigned long seen = jiffies;
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+ int btn;
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+
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+ BH_DBG("event type=%u, code=%u, value=%d\n", type, code, value);
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+
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+ if (type != EV_KEY)
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+ return;
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+
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+ btn = button_get_index(code);
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+ if (btn < 0)
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+ return;
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+
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+ button_hotplug_create_event(button_map[btn].name,
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+ (seen - priv->seen[btn]) / HZ, value);
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+ priv->seen[btn] = seen;
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+}
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+#else
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+static void button_hotplug_event(struct input_handle *handle,
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+ unsigned int type, unsigned int code, int value)
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+{
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+}
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+#endif /* CONFIG_HOTPLUG */
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+
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+static int button_hotplug_connect(struct input_handler *handler,
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+ struct input_dev *dev, const struct input_device_id *id)
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+{
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+ struct bh_priv *priv;
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+ int ret;
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(button_map); i++)
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+ if (test_bit(button_map[i].code, dev->keybit))
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+ break;
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+
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+ if (i == ARRAY_SIZE(button_map))
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+ return -ENODEV;
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+
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+ priv = kzalloc(sizeof(*priv) +
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+ (sizeof(unsigned long) * ARRAY_SIZE(button_map)),
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+ GFP_KERNEL);
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+ if (!priv)
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+ return -ENOMEM;
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+
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+ priv->seen = (unsigned long *) &priv[1];
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+ priv->handle.private = priv;
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+ priv->handle.dev = dev;
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+ priv->handle.handler = handler;
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+ priv->handle.name = DRV_NAME;
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+
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+ ret = input_register_handle(&priv->handle);
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+ if (ret)
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+ goto err_free_priv;
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+
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+ ret = input_open_device(&priv->handle);
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+ if (ret)
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+ goto err_unregister_handle;
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+
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+ BH_DBG("connected to %s\n", dev->name);
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+
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+ return 0;
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+
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+ err_unregister_handle:
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+ input_unregister_handle(&priv->handle);
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+
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+ err_free_priv:
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+ kfree(priv);
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+ return ret;
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+}
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+
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+static void button_hotplug_disconnect(struct input_handle *handle)
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+{
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+ struct bh_priv *priv = handle->private;
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+
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+ input_close_device(handle);
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+ input_unregister_handle(handle);
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+
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+ kfree(priv);
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+}
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+
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+static const struct input_device_id button_hotplug_ids[] = {
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+ {
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+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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+ .evbit = { BIT_MASK(EV_KEY) },
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+ },
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+ {
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+ /* Terminating entry */
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+ },
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+};
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+
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+MODULE_DEVICE_TABLE(input, button_hotplug_ids);
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+
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+static struct input_handler button_hotplug_handler = {
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+ .event = button_hotplug_event,
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+ .connect = button_hotplug_connect,
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+ .disconnect = button_hotplug_disconnect,
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+ .name = DRV_NAME,
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+ .id_table = button_hotplug_ids,
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+};
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+
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+/* -------------------------------------------------------------------------*/
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+
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+static int __init button_hotplug_init(void)
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+{
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+ int ret;
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+
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+ printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
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+ ret = input_register_handler(&button_hotplug_handler);
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+ if (ret)
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+ BH_ERR("unable to register input handler\n");
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+
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+ return ret;
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+}
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+module_init(button_hotplug_init);
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+
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+static void __exit button_hotplug_exit(void)
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+{
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+ input_unregister_handler(&button_hotplug_handler);
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+}
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+module_exit(button_hotplug_exit);
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+
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+MODULE_DESCRIPTION(DRV_DESC);
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+MODULE_VERSION(DRV_VERSION);
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+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
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+MODULE_LICENSE("GPL v2");
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+
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