diff options
author | John Crispin <john@openwrt.org> | 2013-06-21 16:54:37 +0000 |
---|---|---|
committer | John Crispin <john@openwrt.org> | 2013-06-21 16:54:37 +0000 |
commit | 4ebf19b48fafc8d94e14e4ba779969613b241a6a (patch) | |
tree | 9918f890a8915023b49ea30948beb5d048c333fa /package/system/gpio-button-hotplug/src/gpio-button-hotplug.c | |
parent | 44b1688e6c7b4f16f7165fbd560e1183aef69090 (diff) | |
download | master-31e0f0ae-4ebf19b48fafc8d94e14e4ba779969613b241a6a.tar.gz master-31e0f0ae-4ebf19b48fafc8d94e14e4ba779969613b241a6a.tar.bz2 master-31e0f0ae-4ebf19b48fafc8d94e14e4ba779969613b241a6a.zip |
packages: clean up the package folder
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 37007
Diffstat (limited to 'package/system/gpio-button-hotplug/src/gpio-button-hotplug.c')
-rw-r--r-- | package/system/gpio-button-hotplug/src/gpio-button-hotplug.c | 564 |
1 files changed, 0 insertions, 564 deletions
diff --git a/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c b/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c deleted file mode 100644 index 9d91b57b56..0000000000 --- a/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c +++ /dev/null @@ -1,564 +0,0 @@ -/* - * GPIO Button Hotplug driver - * - * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org> - * 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@openwrt.org> - * 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/workqueue.h> -#include <linux/skbuff.h> -#include <linux/netlink.h> -#include <linux/kobject.h> -#include <linux/input.h> -#include <linux/platform_device.h> -#include <linux/of_gpio.h> -#include <linux/gpio_keys.h> - -#define DRV_NAME "gpio-keys-polled" - -#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 ) - -struct bh_priv { - unsigned long seen; -}; - -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; -}; - -struct gpio_keys_button_data { - struct delayed_work work; - struct bh_priv bh; - int last_state; - int count; - int threshold; - int can_sleep; -}; - -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_RFKILL, "rfkill"), -#ifdef KEY_WPS_BUTTON - BH_MAP(KEY_WPS_BUTTON, "wps"), -#endif /* KEY_WPS_BUTTON */ -}; - -/* -------------------------------------------------------------------------*/ - -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; -} - -/* -------------------------------------------------------------------------*/ - -#ifdef CONFIG_HOTPLUG -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 gpio_keys_button_data *data, - unsigned int type, unsigned int code, int value) -{ - struct bh_priv *priv = &data->bh; - 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) / HZ, value); - priv->seen = seen; -} -#else -static void button_hotplug_event(struct gpio_keys_button_data *data, - unsigned int type, unsigned int code, int value) -{ -} -#endif /* CONFIG_HOTPLUG */ - -struct gpio_keys_polled_dev { - struct delayed_work work; - - struct device *dev; - struct gpio_keys_platform_data *pdata; - struct gpio_keys_button_data data[0]; -}; - -static void gpio_keys_polled_check_state(struct gpio_keys_button *button, - struct gpio_keys_button_data *bdata) -{ - int state; - - if (bdata->can_sleep) - state = !!gpio_get_value_cansleep(button->gpio); - else - state = !!gpio_get_value(button->gpio); - - state = !!(state ^ button->active_low); - if (state != bdata->last_state) { - unsigned int type = button->type ?: EV_KEY; - - button_hotplug_event(bdata, type, button->code, state); - bdata->count = 0; - bdata->last_state = state; - } -} - -static void gpio_keys_polled_queue_work(struct gpio_keys_polled_dev *bdev) -{ - struct gpio_keys_platform_data *pdata = bdev->pdata; - unsigned long delay = msecs_to_jiffies(pdata->poll_interval); - - if (delay >= HZ) - delay = round_jiffies_relative(delay); - schedule_delayed_work(&bdev->work, delay); -} - -static void gpio_keys_polled_poll(struct work_struct *work) -{ - struct gpio_keys_polled_dev *bdev = - container_of(work, struct gpio_keys_polled_dev, work.work); - struct gpio_keys_platform_data *pdata = bdev->pdata; - int i; - - for (i = 0; i < bdev->pdata->nbuttons; i++) { - struct gpio_keys_button_data *bdata = &bdev->data[i]; - - if (bdata->count < bdata->threshold) - bdata->count++; - else - gpio_keys_polled_check_state(&pdata->buttons[i], bdata); - } - gpio_keys_polled_queue_work(bdev); -} - -static void gpio_keys_polled_open(struct gpio_keys_polled_dev *bdev) -{ - struct gpio_keys_platform_data *pdata = bdev->pdata; - int i; - - if (pdata->enable) - 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 -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; - int error; - int nbuttons; - int i; - - node = dev->of_node; - 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); |