diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/input/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/apm-power.c | 131 |
3 files changed, 144 insertions, 0 deletions
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig index 63512d906f0..9dea14db724 100644 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -137,6 +137,18 @@ config INPUT_EVBUG To compile this driver as a module, choose M here: the module will be called evbug. +config INPUT_APMPOWER + tristate "Input Power Event -> APM Bridge" if EMBEDDED + depends on INPUT && APM_EMULATION + ---help--- + Say Y here if you want suspend key events to trigger a user + requested suspend through APM. This is useful on embedded + systems where such behviour is desired without userspace + interaction. If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called apm-power. + comment "Input Device Drivers" source "drivers/input/keyboard/Kconfig" diff --git a/drivers/input/Makefile b/drivers/input/Makefile index 99af903bd3c..2ae87b19caa 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -22,3 +22,4 @@ obj-$(CONFIG_INPUT_TABLET) += tablet/ obj-$(CONFIG_INPUT_TOUCHSCREEN) += touchscreen/ obj-$(CONFIG_INPUT_MISC) += misc/ +obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o diff --git a/drivers/input/apm-power.c b/drivers/input/apm-power.c new file mode 100644 index 00000000000..c36d110b349 --- /dev/null +++ b/drivers/input/apm-power.c @@ -0,0 +1,131 @@ +/* + * Input Power Event -> APM Bridge + * + * Copyright (c) 2007 Richard Purdie + * + * 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/input.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/tty.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/apm-emulation.h> + +static void system_power_event(unsigned int keycode) +{ + switch (keycode) { + case KEY_SUSPEND: + apm_queue_event(APM_USER_SUSPEND); + + printk(KERN_INFO "apm-power: Requesting system suspend...\n"); + break; + default: + break; + } +} + +static void apmpower_event(struct input_handle *handle, unsigned int type, + unsigned int code, int value) +{ + /* only react on key down events */ + if (value != 1) + return; + + switch (type) { + case EV_PWR: + system_power_event(code); + break; + + default: + break; + } +} + +static int apmpower_connect(struct input_handler *handler, + struct input_dev *dev, + const struct input_device_id *id) +{ + struct input_handle *handle; + int error; + + handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); + if (!handle) + return -ENOMEM; + + handle->dev = dev; + handle->handler = handler; + handle->name = "apm-power"; + + handler->private = handle; + + error = input_register_handle(handle); + if (error) { + printk(KERN_ERR + "apm-power: Failed to register input power handler, " + "error %d\n", error); + kfree(handle); + return error; + } + + error = input_open_device(handle); + if (error) { + printk(KERN_ERR + "apm-power: Failed to open input power device, " + "error %d\n", error); + input_unregister_handle(handle); + kfree(handle); + return error; + } + + return 0; +} + +static void apmpower_disconnect(struct input_handle *handler) +{ + struct input_handle *handle = handler->private; + + input_close_device(handle); + kfree(handle); +} + +static const struct input_device_id apmpower_ids[] = { + { + .flags = INPUT_DEVICE_ID_MATCH_EVBIT, + .evbit = { BIT_MASK(EV_PWR) }, + }, + { }, +}; + +MODULE_DEVICE_TABLE(input, apmpower_ids); + +static struct input_handler apmpower_handler = { + .event = apmpower_event, + .connect = apmpower_connect, + .disconnect = apmpower_disconnect, + .name = "apm-power", + .id_table = apmpower_ids, +}; + +static int __init apmpower_init(void) +{ + return input_register_handler(&apmpower_handler); +} + +static void __exit apmpower_exit(void) +{ + input_unregister_handler(&apmpower_handler); +} + +module_init(apmpower_init); +module_exit(apmpower_exit); + +MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); +MODULE_DESCRIPTION("Input Power Event -> APM Bridge"); +MODULE_LICENSE("GPL"); |