packages: clean up the package folder
Signed-off-by: John Crispin <blogic@openwrt.org> SVN-Revision: 37007
This commit is contained in:
John Crispin
1
package/kernel/gpio-button-hotplug/src/Makefile
Normal file
1
package/kernel/gpio-button-hotplug/src/Makefile
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@@ -0,0 +1 @@
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obj-m += gpio-button-hotplug.o
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564
package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c
Normal file
564
package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c
Normal file
@@ -0,0 +1,564 @@
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/*
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* GPIO Button Hotplug driver
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*
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* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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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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#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/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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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio_keys.h>
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#define DRV_NAME "gpio-keys-polled"
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#define BH_SKB_SIZE 2048
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#define PFX DRV_NAME ": "
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#undef BH_DEBUG
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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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#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, DRV_NAME, ##args )
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struct bh_priv {
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unsigned long seen;
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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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struct sk_buff *skb;
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struct work_struct work;
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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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struct gpio_keys_button_data {
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struct delayed_work work;
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struct bh_priv bh;
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int last_state;
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int count;
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int threshold;
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int can_sleep;
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};
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extern u64 uevent_next_seqnum(void);
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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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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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BH_MAP(KEY_RFKILL, "rfkill"),
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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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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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if (argv)
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return 0;
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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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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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s = skb_put(event->skb, len + 1);
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strcpy(s, buf);
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BH_DBG("added variable '%s'\n", s);
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return 0;
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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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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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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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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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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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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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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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ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());
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return ret;
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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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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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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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ret = button_hotplug_fill_event(event);
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if (ret)
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goto out_free_skb;
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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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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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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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BH_DBG("create event, name=%s, seen=%lu, pressed=%d\n",
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name, seen, pressed);
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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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event->name = name;
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event->seen = seen;
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event->action = pressed ? "pressed" : "released";
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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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return 0;
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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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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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return -1;
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}
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static void button_hotplug_event(struct gpio_keys_button_data *data,
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unsigned int type, unsigned int code, int value)
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{
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struct bh_priv *priv = &data->bh;
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unsigned long seen = jiffies;
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int btn;
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BH_DBG("event type=%u, code=%u, value=%d\n", type, code, value);
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if (type != EV_KEY)
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return;
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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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button_hotplug_create_event(button_map[btn].name,
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(seen - priv->seen) / HZ, value);
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priv->seen = seen;
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}
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#else
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static void button_hotplug_event(struct gpio_keys_button_data *data,
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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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struct gpio_keys_polled_dev {
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struct delayed_work work;
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struct device *dev;
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struct gpio_keys_platform_data *pdata;
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struct gpio_keys_button_data data[0];
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};
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static void gpio_keys_polled_check_state(struct gpio_keys_button *button,
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struct gpio_keys_button_data *bdata)
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{
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int state;
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if (bdata->can_sleep)
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state = !!gpio_get_value_cansleep(button->gpio);
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else
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state = !!gpio_get_value(button->gpio);
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state = !!(state ^ button->active_low);
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if (state != bdata->last_state) {
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unsigned int type = button->type ?: EV_KEY;
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button_hotplug_event(bdata, type, button->code, state);
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bdata->count = 0;
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bdata->last_state = state;
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}
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}
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static void gpio_keys_polled_queue_work(struct gpio_keys_polled_dev *bdev)
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{
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struct gpio_keys_platform_data *pdata = bdev->pdata;
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unsigned long delay = msecs_to_jiffies(pdata->poll_interval);
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if (delay >= HZ)
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delay = round_jiffies_relative(delay);
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schedule_delayed_work(&bdev->work, delay);
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}
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static void gpio_keys_polled_poll(struct work_struct *work)
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{
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struct gpio_keys_polled_dev *bdev =
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container_of(work, struct gpio_keys_polled_dev, work.work);
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struct gpio_keys_platform_data *pdata = bdev->pdata;
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int i;
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for (i = 0; i < bdev->pdata->nbuttons; i++) {
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struct gpio_keys_button_data *bdata = &bdev->data[i];
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if (bdata->count < bdata->threshold)
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bdata->count++;
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else
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gpio_keys_polled_check_state(&pdata->buttons[i], bdata);
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}
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gpio_keys_polled_queue_work(bdev);
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}
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static void gpio_keys_polled_open(struct gpio_keys_polled_dev *bdev)
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{
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struct gpio_keys_platform_data *pdata = bdev->pdata;
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int i;
|
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|
||||
if (pdata->enable)
|
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pdata->enable(bdev->dev);
|
||||
|
||||
/* report initial state of the buttons */
|
||||
for (i = 0; i < pdata->nbuttons; i++)
|
||||
gpio_keys_polled_check_state(&pdata->buttons[i], &bdev->data[i]);
|
||||
|
||||
gpio_keys_polled_queue_work(bdev);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
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static struct gpio_keys_platform_data *
|
||||
gpio_keys_polled_get_devtree_pdata(struct device *dev)
|
||||
{
|
||||
struct device_node *node, *pp;
|
||||
struct gpio_keys_platform_data *pdata;
|
||||
struct gpio_keys_button *button;
|
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int error;
|
||||
int nbuttons;
|
||||
int i;
|
||||
|
||||
node = dev->of_node;
|
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if (!node)
|
||||
return NULL;
|
||||
|
||||
nbuttons = of_get_child_count(node);
|
||||
if (nbuttons == 0)
|
||||
return NULL;
|
||||
|
||||
pdata = kzalloc(sizeof(*pdata) + nbuttons * (sizeof *button),
|
||||
GFP_KERNEL);
|
||||
if (!pdata) {
|
||||
error = -ENOMEM;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
|
||||
pdata->nbuttons = nbuttons;
|
||||
|
||||
pdata->rep = !!of_get_property(node, "autorepeat", NULL);
|
||||
of_property_read_u32(node, "poll-interval", &pdata->poll_interval);
|
||||
|
||||
i = 0;
|
||||
for_each_child_of_node(node, pp) {
|
||||
enum of_gpio_flags flags;
|
||||
|
||||
if (!of_find_property(pp, "gpios", NULL)) {
|
||||
pdata->nbuttons--;
|
||||
dev_warn(dev, "Found button without gpios\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
button = &pdata->buttons[i++];
|
||||
|
||||
button->gpio = of_get_gpio_flags(pp, 0, &flags);
|
||||
button->active_low = flags & OF_GPIO_ACTIVE_LOW;
|
||||
|
||||
if (of_property_read_u32(pp, "linux,code", &button->code)) {
|
||||
dev_err(dev, "Button without keycode: 0x%x\n",
|
||||
button->gpio);
|
||||
error = -EINVAL;
|
||||
goto err_free_pdata;
|
||||
}
|
||||
|
||||
button->desc = of_get_property(pp, "label", NULL);
|
||||
|
||||
if (of_property_read_u32(pp, "linux,input-type", &button->type))
|
||||
button->type = EV_KEY;
|
||||
|
||||
button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
|
||||
|
||||
if (of_property_read_u32(pp, "debounce-interval",
|
||||
&button->debounce_interval))
|
||||
button->debounce_interval = 5;
|
||||
}
|
||||
|
||||
if (pdata->nbuttons == 0) {
|
||||
error = -EINVAL;
|
||||
goto err_free_pdata;
|
||||
}
|
||||
|
||||
return pdata;
|
||||
|
||||
err_free_pdata:
|
||||
kfree(pdata);
|
||||
err_out:
|
||||
return ERR_PTR(error);
|
||||
}
|
||||
|
||||
static struct of_device_id gpio_keys_polled_of_match[] = {
|
||||
{ .compatible = "gpio-keys-polled", },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
|
||||
|
||||
#else
|
||||
|
||||
static inline struct gpio_keys_platform_data *
|
||||
gpio_keys_polled_get_devtree_pdata(struct device *dev)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
static void gpio_keys_polled_close(struct gpio_keys_polled_dev *bdev)
|
||||
{
|
||||
struct gpio_keys_platform_data *pdata = bdev->pdata;
|
||||
|
||||
cancel_delayed_work_sync(&bdev->work);
|
||||
|
||||
if (pdata->disable)
|
||||
pdata->disable(bdev->dev);
|
||||
}
|
||||
|
||||
static int gpio_keys_polled_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct gpio_keys_polled_dev *bdev;
|
||||
int error;
|
||||
int i;
|
||||
|
||||
if (!pdata) {
|
||||
pdata = gpio_keys_polled_get_devtree_pdata(dev);
|
||||
if (IS_ERR(pdata))
|
||||
return PTR_ERR(pdata);
|
||||
if (!pdata) {
|
||||
dev_err(dev, "missing platform data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
if (!pdata->poll_interval) {
|
||||
dev_err(dev, "missing poll_interval value\n");
|
||||
error = -EINVAL;
|
||||
goto err_free_pdata;
|
||||
}
|
||||
|
||||
bdev = kzalloc(sizeof(struct gpio_keys_polled_dev) +
|
||||
pdata->nbuttons * sizeof(struct gpio_keys_button_data),
|
||||
GFP_KERNEL);
|
||||
if (!bdev) {
|
||||
dev_err(dev, "no memory for private data\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
for (i = 0; i < pdata->nbuttons; i++) {
|
||||
struct gpio_keys_button *button = &pdata->buttons[i];
|
||||
struct gpio_keys_button_data *bdata = &bdev->data[i];
|
||||
unsigned int gpio = button->gpio;
|
||||
|
||||
if (button->wakeup) {
|
||||
dev_err(dev, DRV_NAME " does not support wakeup\n");
|
||||
error = -EINVAL;
|
||||
goto err_free_gpio;
|
||||
}
|
||||
|
||||
error = gpio_request(gpio,
|
||||
button->desc ? button->desc : DRV_NAME);
|
||||
if (error) {
|
||||
dev_err(dev, "unable to claim gpio %u, err=%d\n",
|
||||
gpio, error);
|
||||
goto err_free_gpio;
|
||||
}
|
||||
|
||||
error = gpio_direction_input(gpio);
|
||||
if (error) {
|
||||
dev_err(dev,
|
||||
"unable to set direction on gpio %u, err=%d\n",
|
||||
gpio, error);
|
||||
goto err_free_gpio;
|
||||
}
|
||||
|
||||
bdata->can_sleep = gpio_cansleep(gpio);
|
||||
bdata->last_state = 0;
|
||||
bdata->threshold = DIV_ROUND_UP(button->debounce_interval,
|
||||
pdata->poll_interval);
|
||||
}
|
||||
|
||||
bdev->dev = &pdev->dev;
|
||||
bdev->pdata = pdata;
|
||||
platform_set_drvdata(pdev, bdev);
|
||||
|
||||
INIT_DELAYED_WORK(&bdev->work, gpio_keys_polled_poll);
|
||||
|
||||
gpio_keys_polled_open(bdev);
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_gpio:
|
||||
while (--i >= 0)
|
||||
gpio_free(pdata->buttons[i].gpio);
|
||||
|
||||
kfree(bdev);
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
err_free_pdata:
|
||||
/* If we have no platform_data, we allocated pdata dynamically. */
|
||||
if (!dev_get_platdata(&pdev->dev))
|
||||
kfree(pdata);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static int gpio_keys_polled_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct gpio_keys_polled_dev *bdev = platform_get_drvdata(pdev);
|
||||
struct gpio_keys_platform_data *pdata = bdev->pdata;
|
||||
int i = pdata->nbuttons;
|
||||
|
||||
gpio_keys_polled_close(bdev);
|
||||
|
||||
while (--i >= 0)
|
||||
gpio_free(pdata->buttons[i].gpio);
|
||||
|
||||
kfree(bdev);
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver gpio_keys_polled_driver = {
|
||||
.probe = gpio_keys_polled_probe,
|
||||
.remove = gpio_keys_polled_remove,
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = of_match_ptr(gpio_keys_polled_of_match),
|
||||
},
|
||||
};
|
||||
|
||||
static int __init gpio_keys_polled_init(void)
|
||||
{
|
||||
return platform_driver_register(&gpio_keys_polled_driver);
|
||||
}
|
||||
|
||||
static void __exit gpio_keys_polled_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&gpio_keys_polled_driver);
|
||||
}
|
||||
|
||||
module_init(gpio_keys_polled_init);
|
||||
module_exit(gpio_keys_polled_exit);
|
||||
|
||||
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
|
||||
MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
|
||||
MODULE_DESCRIPTION("Polled GPIO Buttons hotplug driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:" DRV_NAME);
|
||||
Reference in New Issue
Block a user