diff options
| -rw-r--r-- | Documentation/DocBook/device-drivers.tmpl | 4 | ||||
| -rw-r--r-- | drivers/input/Kconfig | 28 | ||||
| -rw-r--r-- | drivers/input/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/input-polldev.c | 14 | ||||
| -rw-r--r-- | drivers/input/sparse-keymap.c | 250 | ||||
| -rw-r--r-- | include/linux/input/sparse-keymap.h | 62 |
6 files changed, 347 insertions, 12 deletions
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl index e994d1d9fbe..f9a6e2c75f1 100644 --- a/Documentation/DocBook/device-drivers.tmpl +++ b/Documentation/DocBook/device-drivers.tmpl @@ -306,6 +306,10 @@ X!Idrivers/video/console/fonts.c <sect1><title>Matrix keyboars/keypads</title> !Iinclude/linux/input/matrix_keypad.h </sect1> + <sect1><title>Sparse keymap support</title> +!Iinclude/linux/input/sparse-keymap.h +!Edrivers/input/sparse-keymap.c + </sect1> </chapter> <chapter id="spi"> diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig index cd50c00ab20..50af91ebd07 100644 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -8,7 +8,7 @@ menu "Input device support" config INPUT tristate "Generic input layer (needed for keyboard, mouse, ...)" if EMBEDDED default y - ---help--- + help Say Y here if you have any input device (mouse, keyboard, tablet, joystick, steering wheel ...) connected to your system and want it to be available to applications. This includes standard PS/2 @@ -27,8 +27,7 @@ if INPUT config INPUT_FF_MEMLESS tristate "Support for memoryless force-feedback devices" - default n - ---help--- + help Say Y here if you have memoryless force-feedback input device such as Logitech WingMan Force 3D, ThrustMaster FireStorm Dual Power 2, or similar. You will also need to enable hardware-specific @@ -52,12 +51,25 @@ config INPUT_POLLDEV To compile this driver as a module, choose M here: the module will be called input-polldev. +config INPUT_SPARSEKMAP + tristate "Sparse keymap support library" + help + Say Y here if you are using a driver for an input + device that uses sparse keymap. 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 sparse-keymap. + comment "Userland interfaces" config INPUT_MOUSEDEV tristate "Mouse interface" if EMBEDDED default y - ---help--- + help Say Y here if you want your mouse to be accessible as char devices 13:32+ - /dev/input/mouseX and 13:63 - /dev/input/mice as an emulated IntelliMouse Explorer PS/2 mouse. That way, all user space @@ -73,7 +85,7 @@ config INPUT_MOUSEDEV_PSAUX bool "Provide legacy /dev/psaux device" default y depends on INPUT_MOUSEDEV - ---help--- + help Say Y here if you want your mouse also be accessible as char device 10:1 - /dev/psaux. The data available through /dev/psaux is exactly the same as the data from /dev/input/mice. @@ -103,7 +115,7 @@ config INPUT_MOUSEDEV_SCREEN_Y config INPUT_JOYDEV tristate "Joystick interface" - ---help--- + help Say Y here if you want your joystick or gamepad to be accessible as char device 13:0+ - /dev/input/jsX device. @@ -125,7 +137,7 @@ config INPUT_EVDEV config INPUT_EVBUG tristate "Event debugging" - ---help--- + help Say Y here if you have a problem with the input subsystem and want all events (keypresses, mouse movements), to be output to the system log. While this is useful for debugging, it's also @@ -140,7 +152,7 @@ config INPUT_EVBUG config INPUT_APMPOWER tristate "Input Power Event -> APM Bridge" if EMBEDDED depends on INPUT && APM_EMULATION - ---help--- + 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 behaviour is desired without userspace diff --git a/drivers/input/Makefile b/drivers/input/Makefile index 4c9c745a702..7ad212d31f9 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -9,6 +9,7 @@ input-core-objs := input.o input-compat.o ff-core.o obj-$(CONFIG_INPUT_FF_MEMLESS) += ff-memless.o obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o +obj-$(CONFIG_INPUT_SPARSEKMAP) += sparse-keymap.o obj-$(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 index 6a2eb399b98..aa6713b4a98 100644 --- a/drivers/input/input-polldev.c +++ b/drivers/input/input-polldev.c @@ -212,7 +212,7 @@ EXPORT_SYMBOL(input_allocate_polled_device); * @dev: device to free * * The function frees memory allocated for polling device and drops - * reference to the associated input device (if present). + * reference to the associated input device. */ void input_free_polled_device(struct input_polled_dev *dev) { @@ -258,6 +258,15 @@ int input_register_polled_device(struct input_polled_dev *dev) return error; } + /* + * Take extra reference to the underlying input device so + * that it survives call to input_unregister_polled_device() + * and is deleted only after input_free_polled_device() + * has been invoked. This is needed to ease task of freeing + * sparse keymaps. + */ + input_get_device(input); + return 0; } EXPORT_SYMBOL(input_register_polled_device); @@ -269,8 +278,6 @@ EXPORT_SYMBOL(input_register_polled_device); * 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) { @@ -278,7 +285,6 @@ void input_unregister_polled_device(struct input_polled_dev *dev) &input_polldev_attribute_group); input_unregister_device(dev->input); - dev->input = NULL; } EXPORT_SYMBOL(input_unregister_polled_device); diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c new file mode 100644 index 00000000000..fbd3987af57 --- /dev/null +++ b/drivers/input/sparse-keymap.c @@ -0,0 +1,250 @@ +/* + * Generic support for sparse keymaps + * + * Copyright (c) 2009 Dmitry Torokhov + * + * Derived from wistron button driver: + * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> + * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> + * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> + * + * 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/input.h> +#include <linux/input/sparse-keymap.h> + +MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>"); +MODULE_DESCRIPTION("Generic support for sparse keymaps"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.1"); + +/** + * sparse_keymap_entry_from_scancode - perform sparse keymap lookup + * @dev: Input device using sparse keymap + * @code: Scan code + * + * This function is used to perform &struct key_entry lookup in an + * input device using sparse keymap. + */ +struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev, + unsigned int code) +{ + struct key_entry *key; + + for (key = dev->keycode; key->type != KE_END; key++) + if (code == key->code) + return key; + + return NULL; +} +EXPORT_SYMBOL(sparse_keymap_entry_from_scancode); + +/** + * sparse_keymap_entry_from_keycode - perform sparse keymap lookup + * @dev: Input device using sparse keymap + * @keycode: Key code + * + * This function is used to perform &struct key_entry lookup in an + * input device using sparse keymap. + */ +struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev, + unsigned int keycode) +{ + struct key_entry *key; + + for (key = dev->keycode; key->type != KE_END; key++) + if (key->type == KE_KEY && keycode == key->keycode) + return key; + + return NULL; +} +EXPORT_SYMBOL(sparse_keymap_entry_from_keycode); + +static int sparse_keymap_getkeycode(struct input_dev *dev, + int scancode, int *keycode) +{ + const struct key_entry *key = + sparse_keymap_entry_from_scancode(dev, scancode); + + if (key && key->type == KE_KEY) { + *keycode = key->keycode; + return 0; + } + + return -EINVAL; +} + +static int sparse_keymap_setkeycode(struct input_dev *dev, + int scancode, int keycode) +{ + struct key_entry *key; + int old_keycode; + + if (keycode < 0 || keycode > KEY_MAX) + return -EINVAL; + + key = sparse_keymap_entry_from_scancode(dev, scancode); + if (key && key->type == KE_KEY) { + old_keycode = key->keycode; + key->keycode = keycode; + set_bit(keycode, dev->keybit); + if (!sparse_keymap_entry_from_keycode(dev, old_keycode)) + clear_bit(old_keycode, dev->keybit); + return 0; + } + + return -EINVAL; +} + +/** + * sparse_keymap_setup - set up sparse keymap for an input device + * @dev: Input device + * @keymap: Keymap in form of array of &key_entry structures ending + * with %KE_END type entry + * @setup: Function that can be used to adjust keymap entries + * depending on device's deeds, may be %NULL + * + * The function calculates size and allocates copy of the original + * keymap after which sets up input device event bits appropriately. + * Before destroying input device allocated keymap should be freed + * with a call to sparse_keymap_free(). + */ +int sparse_keymap_setup(struct input_dev *dev, + const struct key_entry *keymap, + int (*setup)(struct input_dev *, struct key_entry *)) +{ + size_t map_size = 1; /* to account for the last KE_END entry */ + const struct key_entry *e; + struct key_entry *map, *entry; + int i; + int error; + + for (e = keymap; e->type != KE_END; e++) + map_size++; + + map = kcalloc(map_size, sizeof (struct key_entry), GFP_KERNEL); + if (!map) + return -ENOMEM; + + memcpy(map, keymap, map_size * sizeof (struct key_entry)); + + for (i = 0; i < map_size; i++) { + entry = &map[i]; + + if (setup) { + error = setup(dev, entry); + if (error) + goto err_out; + } + + switch (entry->type) { + case KE_KEY: + __set_bit(EV_KEY, dev->evbit); + __set_bit(entry->keycode, dev->keybit); + break; + + case KE_SW: + __set_bit(EV_SW, dev->evbit); + __set_bit(entry->sw.code, dev->swbit); + break; + } + } + + dev->keycode = map; + dev->keycodemax = map_size; + dev->getkeycode = sparse_keymap_getkeycode; + dev->setkeycode = sparse_keymap_setkeycode; + + return 0; + + err_out: + kfree(keymap); + return error; + +} +EXPORT_SYMBOL(sparse_keymap_setup); + +/** + * sparse_keymap_free - free memory allocated for sparse keymap + * @dev: Input device using sparse keymap + * + * This function is used to free memory allocated by sparse keymap + * in an input device that was set up by sparse_keymap_setup(). + */ +void sparse_keymap_free(struct input_dev *dev) +{ + kfree(dev->keycode); + dev->keycode = NULL; + dev->keycodemax = 0; + dev->getkeycode = NULL; + dev->setkeycode = NULL; +} +EXPORT_SYMBOL(sparse_keymap_free); + +/** + * sparse_keymap_report_entry - report event corresponding to given key entry + * @dev: Input device for which event should be reported + * @ke: key entry describing event + * @value: Value that should be reported (ignored by %KE_SW entries) + * @autorelease: Signals whether release event should be emitted for %KE_KEY + * entries right after reporting press event, ignored by all other + * entries + * + * This function is used to report input event described by given + * &struct key_entry. + */ +void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke, + unsigned int value, bool autorelease) +{ + switch (ke->type) { + case KE_KEY: + input_report_key(dev, ke->keycode, value); + input_sync(dev); + if (value && autorelease) { + input_report_key(dev, ke->keycode, 0); + input_sync(dev); + } + break; + + case KE_SW: + value = ke->sw.value; + /* fall through */ + + case KE_VSW: + input_report_switch(dev, ke->sw.code, value); + break; + } +} +EXPORT_SYMBOL(sparse_keymap_report_entry); + +/** + * sparse_keymap_report_event - report event corresponding to given scancode + * @dev: Input device using sparse keymap + * @code: Scan code + * @value: Value that should be reported (ignored by %KE_SW entries) + * @autorelease: Signals whether release event should be emitted for %KE_KEY + * entries right after reporting press event, ignored by all other + * entries + * + * This function is used to perform lookup in an input device using sparse + * keymap and report corresponding event. Returns %true if lookup was + * successful and %false otherwise. + */ +bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code, + unsigned int value, bool autorelease) +{ + const struct key_entry *ke = + sparse_keymap_entry_from_scancode(dev, code); + + if (ke) { + sparse_keymap_report_entry(dev, ke, value, autorelease); + return true; + } + + return false; +} +EXPORT_SYMBOL(sparse_keymap_report_event); + diff --git a/include/linux/input/sparse-keymap.h b/include/linux/input/sparse-keymap.h new file mode 100644 index 00000000000..52db62064c6 --- /dev/null +++ b/include/linux/input/sparse-keymap.h @@ -0,0 +1,62 @@ +#ifndef _SPARSE_KEYMAP_H +#define _SPARSE_KEYMAP_H + +/* + * Copyright (c) 2009 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. + */ + +#define KE_END 0 /* Indicates end of keymap */ +#define KE_KEY 1 /* Ordinary key/button */ +#define KE_SW 2 /* Switch (predetermined value) */ +#define KE_VSW 3 /* Switch (value supplied at runtime) */ +#define KE_IGNORE 4 /* Known entry that should be ignored */ +#define KE_LAST KE_IGNORE + +/** + * struct key_entry - keymap entry for use in sparse keymap + * @type: Type of the key entry (KE_KEY, KE_SW, KE_VSW, KE_END); + * drivers are allowed to extend the list with their own + * private definitions. + * @code: Device-specific data identifying the button/switch + * @keycode: KEY_* code assigned to a key/button + * @sw.code: SW_* code assigned to a switch + * @sw.value: Value that should be sent in an input even when KE_SW + * switch is toggled. KE_VSW switches ignore this field and + * expect driver to supply value for the event. + * + * This structure defines an entry in a sparse keymap used by some + * input devices for which traditional table-based approach is not + * suitable. + */ +struct key_entry { + int type; /* See KE_* above */ + u32 code; + union { + u16 keycode; /* For KE_KEY */ + struct { /* For KE_SW, KE_VSW */ + u8 code; + u8 value; /* For KE_SW, ignored by KE_VSW */ + } sw; + }; +}; + +struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev, + unsigned int code); +struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev, + unsigned int code); +int sparse_keymap_setup(struct input_dev *dev, + const struct key_entry *keymap, + int (*setup)(struct input_dev *, struct key_entry *)); +void sparse_keymap_free(struct input_dev *dev); + +void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke, + unsigned int value, bool autorelease); + +bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code, + unsigned int value, bool autorelease); + +#endif /* _SPARSE_KEYMAP_H */ |