From: Dmitry Torokhov Date: Wed, 13 Jun 2007 05:49:58 +0000 (-0400) Subject: Input: move input-polldev to drivers/input X-Git-Tag: firefly_0821_release~28496^2~6 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=893e7c2db05f14032f2390ef7c59a499fc25ccae;p=firefly-linux-kernel-4.4.55.git Input: move input-polldev to drivers/input To work around deficiences in Kconfig that allows to "select" a symbol without automatically selecting all dependencies for that symbol move input-polldev from drivers/input/misc to drivers/input thus removing extra dependency on CONFIG_INPUT_MISC. Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig index 0e9b69535ad6..3cfff40695ec 100644 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -38,6 +38,19 @@ config INPUT_FF_MEMLESS To compile this driver as a module, choose M here: the module will be called ff-memless. +config INPUT_POLLDEV + tristate "Polled input device skeleton" + help + Say Y here if you are using a driver for an input + device that periodically polls hardware state. This + option is only useful for out-of-tree drivers since + in-tree drivers select it automatically. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called input-polldev. + comment "Userland interfaces" config INPUT_MOUSEDEV diff --git a/drivers/input/Makefile b/drivers/input/Makefile index 8a2dd987546c..15eb752697b3 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_INPUT) += input-core.o input-core-objs := input.o ff-core.o obj-$(CONFIG_INPUT_FF_MEMLESS) += ff-memless.o +obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o obj-$(CONFIG_INPUT_MOUSEDEV) += mousedev.o obj-$(CONFIG_INPUT_JOYDEV) += joydev.o diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c new file mode 100644 index 000000000000..b773d4c756a6 --- /dev/null +++ b/drivers/input/input-polldev.c @@ -0,0 +1,176 @@ +/* + * Generic implementation of a polled input device + + * Copyright (c) 2007 Dmitry Torokhov + * + * 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 +#include +#include + +MODULE_AUTHOR("Dmitry Torokhov "); +MODULE_DESCRIPTION("Generic implementation of a polled input device"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.1"); + +static DEFINE_MUTEX(polldev_mutex); +static int polldev_users; +static struct workqueue_struct *polldev_wq; + +static int input_polldev_start_workqueue(void) +{ + int retval; + + retval = mutex_lock_interruptible(&polldev_mutex); + if (retval) + return retval; + + if (!polldev_users) { + polldev_wq = create_singlethread_workqueue("ipolldevd"); + if (!polldev_wq) { + printk(KERN_ERR "input-polldev: failed to create " + "ipolldevd workqueue\n"); + retval = -ENOMEM; + goto out; + } + } + + polldev_users++; + + out: + mutex_unlock(&polldev_mutex); + return retval; +} + +static void input_polldev_stop_workqueue(void) +{ + mutex_lock(&polldev_mutex); + + if (!--polldev_users) + destroy_workqueue(polldev_wq); + + mutex_unlock(&polldev_mutex); +} + +static void input_polled_device_work(struct work_struct *work) +{ + struct input_polled_dev *dev = + container_of(work, struct input_polled_dev, work.work); + + dev->poll(dev); + queue_delayed_work(polldev_wq, &dev->work, + msecs_to_jiffies(dev->poll_interval)); +} + +static int input_open_polled_device(struct input_dev *input) +{ + struct input_polled_dev *dev = input->private; + int error; + + error = input_polldev_start_workqueue(); + if (error) + return error; + + if (dev->flush) + dev->flush(dev); + + queue_delayed_work(polldev_wq, &dev->work, + msecs_to_jiffies(dev->poll_interval)); + + return 0; +} + +static void input_close_polled_device(struct input_dev *input) +{ + struct input_polled_dev *dev = input->private; + + cancel_rearming_delayed_workqueue(polldev_wq, &dev->work); + input_polldev_stop_workqueue(); +} + +/** + * input_allocate_polled_device - allocated memory polled device + * + * The function allocates memory for a polled device and also + * for an input device associated with this polled device. + */ +struct input_polled_dev *input_allocate_polled_device(void) +{ + struct input_polled_dev *dev; + + dev = kzalloc(sizeof(struct input_polled_dev), GFP_KERNEL); + if (!dev) + return NULL; + + dev->input = input_allocate_device(); + if (!dev->input) { + kfree(dev); + return NULL; + } + + return dev; +} +EXPORT_SYMBOL(input_allocate_polled_device); + +/** + * input_free_polled_device - free memory allocated for polled device + * @dev: device to free + * + * The function frees memory allocated for polling device and drops + * reference to the associated input device (if present). + */ +void input_free_polled_device(struct input_polled_dev *dev) +{ + if (dev) { + input_free_device(dev->input); + kfree(dev); + } +} +EXPORT_SYMBOL(input_free_polled_device); + +/** + * input_register_polled_device - register polled device + * @dev: device to register + * + * The function registers previously initialized polled input device + * with input layer. The device should be allocated with call to + * input_allocate_polled_device(). Callers should also set up poll() + * method and set up capabilities (id, name, phys, bits) of the + * corresponing input_dev structure. + */ +int input_register_polled_device(struct input_polled_dev *dev) +{ + struct input_dev *input = dev->input; + + INIT_DELAYED_WORK(&dev->work, input_polled_device_work); + if (!dev->poll_interval) + dev->poll_interval = 500; + input->private = dev; + input->open = input_open_polled_device; + input->close = input_close_polled_device; + + return input_register_device(input); +} +EXPORT_SYMBOL(input_register_polled_device); + +/** + * input_unregister_polled_device - unregister polled device + * @dev: device to unregister + * + * The function unregisters previously registered polled input + * device from input layer. Polling is stopped and device is + * ready to be freed with call to input_free_polled_device(). + * Callers should not attempt to access dev->input pointer + * after calling this function. + */ +void input_unregister_polled_device(struct input_polled_dev *dev) +{ + input_unregister_device(dev->input); + dev->input = NULL; +} +EXPORT_SYMBOL(input_unregister_polled_device); + diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 6013ace94d98..98ddafa30535 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -165,17 +165,6 @@ config INPUT_UINPUT To compile this driver as a module, choose M here: the module will be called uinput. -config INPUT_POLLDEV - tristate "Polled input device skeleton" - help - Say Y here if you are using a driver for an input - device that periodically polls hardware state. This - option is only useful for out-of-tree drivers since - in-tree drivers select it automatically. - - To compile this driver as a module, choose M here: the - module will be called input-polldev. - config HP_SDC_RTC tristate "HP SDC Real Time Clock" depends on GSC || HP300 diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 8b2f7799e25c..3585b5038418 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -4,7 +4,6 @@ # Each configuration option enables a list of files. -obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o diff --git a/drivers/input/misc/input-polldev.c b/drivers/input/misc/input-polldev.c deleted file mode 100644 index b773d4c756a6..000000000000 --- a/drivers/input/misc/input-polldev.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * Generic implementation of a polled input device - - * Copyright (c) 2007 Dmitry Torokhov - * - * 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 -#include -#include - -MODULE_AUTHOR("Dmitry Torokhov "); -MODULE_DESCRIPTION("Generic implementation of a polled input device"); -MODULE_LICENSE("GPL v2"); -MODULE_VERSION("0.1"); - -static DEFINE_MUTEX(polldev_mutex); -static int polldev_users; -static struct workqueue_struct *polldev_wq; - -static int input_polldev_start_workqueue(void) -{ - int retval; - - retval = mutex_lock_interruptible(&polldev_mutex); - if (retval) - return retval; - - if (!polldev_users) { - polldev_wq = create_singlethread_workqueue("ipolldevd"); - if (!polldev_wq) { - printk(KERN_ERR "input-polldev: failed to create " - "ipolldevd workqueue\n"); - retval = -ENOMEM; - goto out; - } - } - - polldev_users++; - - out: - mutex_unlock(&polldev_mutex); - return retval; -} - -static void input_polldev_stop_workqueue(void) -{ - mutex_lock(&polldev_mutex); - - if (!--polldev_users) - destroy_workqueue(polldev_wq); - - mutex_unlock(&polldev_mutex); -} - -static void input_polled_device_work(struct work_struct *work) -{ - struct input_polled_dev *dev = - container_of(work, struct input_polled_dev, work.work); - - dev->poll(dev); - queue_delayed_work(polldev_wq, &dev->work, - msecs_to_jiffies(dev->poll_interval)); -} - -static int input_open_polled_device(struct input_dev *input) -{ - struct input_polled_dev *dev = input->private; - int error; - - error = input_polldev_start_workqueue(); - if (error) - return error; - - if (dev->flush) - dev->flush(dev); - - queue_delayed_work(polldev_wq, &dev->work, - msecs_to_jiffies(dev->poll_interval)); - - return 0; -} - -static void input_close_polled_device(struct input_dev *input) -{ - struct input_polled_dev *dev = input->private; - - cancel_rearming_delayed_workqueue(polldev_wq, &dev->work); - input_polldev_stop_workqueue(); -} - -/** - * input_allocate_polled_device - allocated memory polled device - * - * The function allocates memory for a polled device and also - * for an input device associated with this polled device. - */ -struct input_polled_dev *input_allocate_polled_device(void) -{ - struct input_polled_dev *dev; - - dev = kzalloc(sizeof(struct input_polled_dev), GFP_KERNEL); - if (!dev) - return NULL; - - dev->input = input_allocate_device(); - if (!dev->input) { - kfree(dev); - return NULL; - } - - return dev; -} -EXPORT_SYMBOL(input_allocate_polled_device); - -/** - * input_free_polled_device - free memory allocated for polled device - * @dev: device to free - * - * The function frees memory allocated for polling device and drops - * reference to the associated input device (if present). - */ -void input_free_polled_device(struct input_polled_dev *dev) -{ - if (dev) { - input_free_device(dev->input); - kfree(dev); - } -} -EXPORT_SYMBOL(input_free_polled_device); - -/** - * input_register_polled_device - register polled device - * @dev: device to register - * - * The function registers previously initialized polled input device - * with input layer. The device should be allocated with call to - * input_allocate_polled_device(). Callers should also set up poll() - * method and set up capabilities (id, name, phys, bits) of the - * corresponing input_dev structure. - */ -int input_register_polled_device(struct input_polled_dev *dev) -{ - struct input_dev *input = dev->input; - - INIT_DELAYED_WORK(&dev->work, input_polled_device_work); - if (!dev->poll_interval) - dev->poll_interval = 500; - input->private = dev; - input->open = input_open_polled_device; - input->close = input_close_polled_device; - - return input_register_device(input); -} -EXPORT_SYMBOL(input_register_polled_device); - -/** - * input_unregister_polled_device - unregister polled device - * @dev: device to unregister - * - * The function unregisters previously registered polled input - * device from input layer. Polling is stopped and device is - * ready to be freed with call to input_free_polled_device(). - * Callers should not attempt to access dev->input pointer - * after calling this function. - */ -void input_unregister_polled_device(struct input_polled_dev *dev) -{ - input_unregister_device(dev->input); - dev->input = NULL; -} -EXPORT_SYMBOL(input_unregister_polled_device); -