From 0b7024ac4df5821347141c18e680b7166bc1cb20 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 2 Feb 2010 21:08:26 -0800 Subject: Input: add match() method to input hanlders Get rid of blacklist in input handler structure and instead allow handlers to define their own match() method to perform fine-grained filtering of supported devices. Signed-off-by: Dmitry Torokhov --- drivers/char/keyboard.c | 24 ++++++++++++++++-------- drivers/input/input.c | 13 ++++++------- drivers/input/joydev.c | 32 +++++++++++++++----------------- 3 files changed, 37 insertions(+), 32 deletions(-) (limited to 'drivers') diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c index cbf64b985ef..ada25bb8941 100644 --- a/drivers/char/keyboard.c +++ b/drivers/char/keyboard.c @@ -1323,6 +1323,21 @@ static void kbd_event(struct input_handle *handle, unsigned int event_type, schedule_console_callback(); } +static bool kbd_match(struct input_handler *handler, struct input_dev *dev) +{ + int i; + + if (test_bit(EV_SND, dev->evbit)) + return true; + + if (test_bit(EV_KEY, dev->evbit)) + for (i = KEY_RESERVED; i < BTN_MISC; i++) + if (test_bit(i, dev->keybit)) + return true; + + return false; +} + /* * When a keyboard (or other input device) is found, the kbd_connect * function is called. The function then looks at the device, and if it @@ -1334,14 +1349,6 @@ static int kbd_connect(struct input_handler *handler, struct input_dev *dev, { struct input_handle *handle; int error; - int i; - - for (i = KEY_RESERVED; i < BTN_MISC; i++) - if (test_bit(i, dev->keybit)) - break; - - if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit)) - return -ENODEV; handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); if (!handle) @@ -1407,6 +1414,7 @@ MODULE_DEVICE_TABLE(input, kbd_ids); static struct input_handler kbd_handler = { .event = kbd_event, + .match = kbd_match, .connect = kbd_connect, .disconnect = kbd_disconnect, .start = kbd_start, diff --git a/drivers/input/input.c b/drivers/input/input.c index 7080a9d4b84..dae49eba6cc 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -723,12 +723,13 @@ EXPORT_SYMBOL(input_set_keycode); if (i != BITS_TO_LONGS(max)) \ continue; -static const struct input_device_id *input_match_device(const struct input_device_id *id, +static const struct input_device_id *input_match_device(struct input_handler *handler, struct input_dev *dev) { + const struct input_device_id *id; int i; - for (; id->flags || id->driver_info; id++) { + for (id = handler->id_table; id->flags || id->driver_info; id++) { if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) if (id->bustype != dev->id.bustype) @@ -756,7 +757,8 @@ static const struct input_device_id *input_match_device(const struct input_devic MATCH_BIT(ffbit, FF_MAX); MATCH_BIT(swbit, SW_MAX); - return id; + if (!handler->match || handler->match(handler, dev)) + return id; } return NULL; @@ -767,10 +769,7 @@ static int input_attach_handler(struct input_dev *dev, struct input_handler *han const struct input_device_id *id; int error; - if (handler->blacklist && input_match_device(handler->blacklist, dev)) - return -ENODEV; - - id = input_match_device(handler->id_table, dev); + id = input_match_device(handler, dev); if (!id) return -ENODEV; diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c index b1bd6dd3228..63e71f2a7ac 100644 --- a/drivers/input/joydev.c +++ b/drivers/input/joydev.c @@ -775,6 +775,20 @@ static void joydev_cleanup(struct joydev *joydev) input_close_device(handle); } + +static bool joydev_match(struct input_handler *handler, struct input_dev *dev) +{ + /* Avoid touchpads and touchscreens */ + if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit)) + return false; + + /* Avoid tablets, digitisers and similar devices */ + if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit)) + return false; + + return true; +} + static int joydev_connect(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id) { @@ -894,22 +908,6 @@ static void joydev_disconnect(struct input_handle *handle) put_device(&joydev->dev); } -static const struct input_device_id joydev_blacklist[] = { - { - .flags = INPUT_DEVICE_ID_MATCH_EVBIT | - INPUT_DEVICE_ID_MATCH_KEYBIT, - .evbit = { BIT_MASK(EV_KEY) }, - .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, - }, /* Avoid itouchpads and touchscreens */ - { - .flags = INPUT_DEVICE_ID_MATCH_EVBIT | - INPUT_DEVICE_ID_MATCH_KEYBIT, - .evbit = { BIT_MASK(EV_KEY) }, - .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) }, - }, /* Avoid tablets, digitisers and similar devices */ - { } /* Terminating entry */ -}; - static const struct input_device_id joydev_ids[] = { { .flags = INPUT_DEVICE_ID_MATCH_EVBIT | @@ -936,13 +934,13 @@ MODULE_DEVICE_TABLE(input, joydev_ids); static struct input_handler joydev_handler = { .event = joydev_event, + .match = joydev_match, .connect = joydev_connect, .disconnect = joydev_disconnect, .fops = &joydev_fops, .minor = JOYDEV_MINOR_BASE, .name = "joydev", .id_table = joydev_ids, - .blacklist = joydev_blacklist, }; static int __init joydev_init(void) -- cgit v1.2.3