diff options
Diffstat (limited to 'drivers/input/input.c')
| -rw-r--r-- | drivers/input/input.c | 286 |
1 files changed, 208 insertions, 78 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index 7919c2537225..db409d6bd5d2 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -24,7 +24,6 @@ #include <linux/device.h> #include <linux/mutex.h> #include <linux/rcupdate.h> -#include <linux/smp_lock.h> #include "input-compat.h" MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); @@ -74,6 +73,7 @@ static int input_defuzz_abs_event(int value, int old_val, int fuzz) * dev->event_lock held and interrupts disabled. */ static void input_pass_event(struct input_dev *dev, + struct input_handler *src_handler, unsigned int type, unsigned int code, int value) { struct input_handler *handler; @@ -92,6 +92,15 @@ static void input_pass_event(struct input_dev *dev, continue; handler = handle->handler; + + /* + * If this is the handler that injected this + * particular event we want to skip it to avoid + * filters firing again and again. + */ + if (handler == src_handler) + continue; + if (!handler->filter) { if (filtered) break; @@ -121,7 +130,7 @@ static void input_repeat_key(unsigned long data) if (test_bit(dev->repeat_key, dev->key) && is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { - input_pass_event(dev, EV_KEY, dev->repeat_key, 2); + input_pass_event(dev, NULL, EV_KEY, dev->repeat_key, 2); if (dev->sync) { /* @@ -130,7 +139,7 @@ static void input_repeat_key(unsigned long data) * Otherwise assume that the driver will send * SYN_REPORT once it's done. */ - input_pass_event(dev, EV_SYN, SYN_REPORT, 1); + input_pass_event(dev, NULL, EV_SYN, SYN_REPORT, 1); } if (dev->rep[REP_PERIOD]) @@ -163,6 +172,7 @@ static void input_stop_autorepeat(struct input_dev *dev) #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE) static int input_handle_abs_event(struct input_dev *dev, + struct input_handler *src_handler, unsigned int code, int *pval) { bool is_mt_event; @@ -171,7 +181,7 @@ static int input_handle_abs_event(struct input_dev *dev, if (code == ABS_MT_SLOT) { /* * "Stage" the event; we'll flush it later, when we - * get actiual touch data. + * get actual touch data. */ if (*pval >= 0 && *pval < dev->mtsize) dev->slot = *pval; @@ -188,7 +198,7 @@ static int input_handle_abs_event(struct input_dev *dev, pold = &mtslot->abs[code - ABS_MT_FIRST]; } else { /* - * Bypass filtering for multitouch events when + * Bypass filtering for multi-touch events when * not employing slots. */ pold = NULL; @@ -206,13 +216,15 @@ static int input_handle_abs_event(struct input_dev *dev, /* Flush pending "slot" event */ if (is_mt_event && dev->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { input_abs_set_val(dev, ABS_MT_SLOT, dev->slot); - input_pass_event(dev, EV_ABS, ABS_MT_SLOT, dev->slot); + input_pass_event(dev, src_handler, + EV_ABS, ABS_MT_SLOT, dev->slot); } return INPUT_PASS_TO_HANDLERS; } static void input_handle_event(struct input_dev *dev, + struct input_handler *src_handler, unsigned int type, unsigned int code, int value) { int disposition = INPUT_IGNORE_EVENT; @@ -265,7 +277,8 @@ static void input_handle_event(struct input_dev *dev, case EV_ABS: if (is_event_supported(code, dev->absbit, ABS_MAX)) - disposition = input_handle_abs_event(dev, code, &value); + disposition = input_handle_abs_event(dev, src_handler, + code, &value); break; @@ -323,7 +336,7 @@ static void input_handle_event(struct input_dev *dev, dev->event(dev, type, code, value); if (disposition & INPUT_PASS_TO_HANDLERS) - input_pass_event(dev, type, code, value); + input_pass_event(dev, src_handler, type, code, value); } /** @@ -352,7 +365,7 @@ void input_event(struct input_dev *dev, spin_lock_irqsave(&dev->event_lock, flags); add_input_randomness(type, code, value); - input_handle_event(dev, type, code, value); + input_handle_event(dev, NULL, type, code, value); spin_unlock_irqrestore(&dev->event_lock, flags); } } @@ -382,7 +395,8 @@ void input_inject_event(struct input_handle *handle, rcu_read_lock(); grab = rcu_dereference(dev->grab); if (!grab || grab == handle) - input_handle_event(dev, type, code, value); + input_handle_event(dev, handle->handler, + type, code, value); rcu_read_unlock(); spin_unlock_irqrestore(&dev->event_lock, flags); @@ -595,10 +609,10 @@ static void input_dev_release_keys(struct input_dev *dev) for (code = 0; code <= KEY_MAX; code++) { if (is_event_supported(code, dev->keybit, KEY_MAX) && __test_and_clear_bit(code, dev->key)) { - input_pass_event(dev, EV_KEY, code, 0); + input_pass_event(dev, NULL, EV_KEY, code, 0); } } - input_pass_event(dev, EV_SYN, SYN_REPORT, 1); + input_pass_event(dev, NULL, EV_SYN, SYN_REPORT, 1); } } @@ -634,78 +648,141 @@ static void input_disconnect_device(struct input_dev *dev) spin_unlock_irq(&dev->event_lock); } -static int input_fetch_keycode(struct input_dev *dev, int scancode) +/** + * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry + * @ke: keymap entry containing scancode to be converted. + * @scancode: pointer to the location where converted scancode should + * be stored. + * + * This function is used to convert scancode stored in &struct keymap_entry + * into scalar form understood by legacy keymap handling methods. These + * methods expect scancodes to be represented as 'unsigned int'. + */ +int input_scancode_to_scalar(const struct input_keymap_entry *ke, + unsigned int *scancode) +{ + switch (ke->len) { + case 1: + *scancode = *((u8 *)ke->scancode); + break; + + case 2: + *scancode = *((u16 *)ke->scancode); + break; + + case 4: + *scancode = *((u32 *)ke->scancode); + break; + + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL(input_scancode_to_scalar); + +/* + * Those routines handle the default case where no [gs]etkeycode() is + * defined. In this case, an array indexed by the scancode is used. + */ + +static unsigned int input_fetch_keycode(struct input_dev *dev, + unsigned int index) { switch (dev->keycodesize) { - case 1: - return ((u8 *)dev->keycode)[scancode]; + case 1: + return ((u8 *)dev->keycode)[index]; - case 2: - return ((u16 *)dev->keycode)[scancode]; + case 2: + return ((u16 *)dev->keycode)[index]; - default: - return ((u32 *)dev->keycode)[scancode]; + default: + return ((u32 *)dev->keycode)[index]; } } static int input_default_getkeycode(struct input_dev *dev, - unsigned int scancode, - unsigned int *keycode) + struct input_keymap_entry *ke) { + unsigned int index; + int error; + if (!dev->keycodesize) return -EINVAL; - if (scancode >= dev->keycodemax) + if (ke->flags & INPUT_KEYMAP_BY_INDEX) + index = ke->index; + else { + error = input_scancode_to_scalar(ke, &index); + if (error) + return error; + } + + if (index >= dev->keycodemax) return -EINVAL; - *keycode = input_fetch_keycode(dev, scancode); + ke->keycode = input_fetch_keycode(dev, index); + ke->index = index; + ke->len = sizeof(index); + memcpy(ke->scancode, &index, sizeof(index)); return 0; } static int input_default_setkeycode(struct input_dev *dev, - unsigned int scancode, - unsigned int keycode) + const struct input_keymap_entry *ke, + unsigned int *old_keycode) { - int old_keycode; + unsigned int index; + int error; int i; - if (scancode >= dev->keycodemax) + if (!dev->keycodesize) return -EINVAL; - if (!dev->keycodesize) + if (ke->flags & INPUT_KEYMAP_BY_INDEX) { + index = ke->index; + } else { + error = input_scancode_to_scalar(ke, &index); + if (error) + return error; + } + + if (index >= dev->keycodemax) return -EINVAL; - if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8))) + if (dev->keycodesize < sizeof(ke->keycode) && + (ke->keycode >> (dev->keycodesize * 8))) return -EINVAL; switch (dev->keycodesize) { case 1: { u8 *k = (u8 *)dev->keycode; - old_keycode = k[scancode]; - k[scancode] = keycode; + *old_keycode = k[index]; + k[index] = ke->keycode; break; } case 2: { u16 *k = (u16 *)dev->keycode; - old_keycode = k[scancode]; - k[scancode] = keycode; + *old_keycode = k[index]; + k[index] = ke->keycode; break; } default: { u32 *k = (u32 *)dev->keycode; - old_keycode = k[scancode]; - k[scancode] = keycode; + *old_keycode = k[index]; + k[index] = ke->keycode; break; } } - __clear_bit(old_keycode, dev->keybit); - __set_bit(keycode, dev->keybit); + __clear_bit(*old_keycode, dev->keybit); + __set_bit(ke->keycode, dev->keybit); for (i = 0; i < dev->keycodemax; i++) { - if (input_fetch_keycode(dev, i) == old_keycode) { - __set_bit(old_keycode, dev->keybit); + if (input_fetch_keycode(dev, i) == *old_keycode) { + __set_bit(*old_keycode, dev->keybit); break; /* Setting the bit twice is useless, so break */ } } @@ -716,53 +793,86 @@ static int input_default_setkeycode(struct input_dev *dev, /** * input_get_keycode - retrieve keycode currently mapped to a given scancode * @dev: input device which keymap is being queried - * @scancode: scancode (or its equivalent for device in question) for which - * keycode is needed - * @keycode: result + * @ke: keymap entry * * This function should be called by anyone interested in retrieving current - * keymap. Presently keyboard and evdev handlers use it. + * keymap. Presently evdev handlers use it. */ -int input_get_keycode(struct input_dev *dev, - unsigned int scancode, unsigned int *keycode) +int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke) { unsigned long flags; int retval; spin_lock_irqsave(&dev->event_lock, flags); - retval = dev->getkeycode(dev, scancode, keycode); - spin_unlock_irqrestore(&dev->event_lock, flags); + if (dev->getkeycode) { + /* + * Support for legacy drivers, that don't implement the new + * ioctls + */ + u32 scancode = ke->index; + + memcpy(ke->scancode, &scancode, sizeof(scancode)); + ke->len = sizeof(scancode); + retval = dev->getkeycode(dev, scancode, &ke->keycode); + } else { + retval = dev->getkeycode_new(dev, ke); + } + + spin_unlock_irqrestore(&dev->event_lock, flags); return retval; } EXPORT_SYMBOL(input_get_keycode); /** - * input_get_keycode - assign new keycode to a given scancode + * input_set_keycode - attribute a keycode to a given scancode * @dev: input device which keymap is being updated - * @scancode: scancode (or its equivalent for device in question) - * @keycode: new keycode to be assigned to the scancode + * @ke: new keymap entry * * This function should be called by anyone needing to update current * keymap. Presently keyboard and evdev handlers use it. */ int input_set_keycode(struct input_dev *dev, - unsigned int scancode, unsigned int keycode) + const struct input_keymap_entry *ke) { unsigned long flags; unsigned int old_keycode; int retval; - if (keycode > KEY_MAX) + if (ke->keycode > KEY_MAX) return -EINVAL; spin_lock_irqsave(&dev->event_lock, flags); - retval = dev->getkeycode(dev, scancode, &old_keycode); - if (retval) - goto out; + if (dev->setkeycode) { + /* + * Support for legacy drivers, that don't implement the new + * ioctls + */ + unsigned int scancode; + + retval = input_scancode_to_scalar(ke, &scancode); + if (retval) + goto out; + + /* + * We need to know the old scancode, in order to generate a + * keyup effect, if the set operation happens successfully + */ + if (!dev->getkeycode) { + retval = -EINVAL; + goto out; + } + + retval = dev->getkeycode(dev, scancode, &old_keycode); + if (retval) + goto out; + + retval = dev->setkeycode(dev, scancode, ke->keycode); + } else { + retval = dev->setkeycode_new(dev, ke, &old_keycode); + } - retval = dev->setkeycode(dev, scancode, keycode); if (retval) goto out; @@ -777,9 +887,9 @@ int input_set_keycode(struct input_dev *dev, !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && __test_and_clear_bit(old_keycode, dev->key)) { - input_pass_event(dev, EV_KEY, old_keycode, 0); + input_pass_event(dev, NULL, EV_KEY, old_keycode, 0); if (dev->sync) - input_pass_event(dev, EV_SYN, SYN_REPORT, 1); + input_pass_event(dev, NULL, EV_SYN, SYN_REPORT, 1); } out: @@ -1469,8 +1579,7 @@ static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env) } \ } while (0) -#ifdef CONFIG_PM -static void input_dev_reset(struct input_dev *dev, bool activate) +static void input_dev_toggle(struct input_dev *dev, bool activate) { if (!dev->event) return; @@ -1484,12 +1593,44 @@ static void input_dev_reset(struct input_dev *dev, bool activate) } } +/** + * input_reset_device() - reset/restore the state of input device + * @dev: input device whose state needs to be reset + * + * This function tries to reset the state of an opened input device and + * bring internal state and state if the hardware in sync with each other. + * We mark all keys as released, restore LED state, repeat rate, etc. + */ +void input_reset_device(struct input_dev *dev) +{ + mutex_lock(&dev->mutex); + + if (dev->users) { + input_dev_toggle(dev, true); + + /* + * Keys that have been pressed at suspend time are unlikely + * to be still pressed when we resume. + */ + spin_lock_irq(&dev->event_lock); + input_dev_release_keys(dev); + spin_unlock_irq(&dev->event_lock); + } + + mutex_unlock(&dev->mutex); +} +EXPORT_SYMBOL(input_reset_device); + +#ifdef CONFIG_PM static int input_dev_suspend(struct device *dev) { struct input_dev *input_dev = to_input_dev(dev); mutex_lock(&input_dev->mutex); - input_dev_reset(input_dev, false); + + if (input_dev->users) + input_dev_toggle(input_dev, false); + mutex_unlock(&input_dev->mutex); return 0; @@ -1499,18 +1640,7 @@ static int input_dev_resume(struct device *dev) { struct input_dev *input_dev = to_input_dev(dev); - mutex_lock(&input_dev->mutex); - input_dev_reset(input_dev, true); - - /* - * Keys that have been pressed at suspend time are unlikely - * to be still pressed when we resume. - */ - spin_lock_irq(&input_dev->event_lock); - input_dev_release_keys(input_dev); - spin_unlock_irq(&input_dev->event_lock); - - mutex_unlock(&input_dev->mutex); + input_reset_device(input_dev); return 0; } @@ -1601,7 +1731,7 @@ EXPORT_SYMBOL(input_free_device); * * This function allocates all necessary memory for MT slot handling in the * input device, and adds ABS_MT_SLOT to the device capabilities. All slots - * are initially marked as unused iby setting ABS_MT_TRACKING_ID to -1. + * are initially marked as unused by setting ABS_MT_TRACKING_ID to -1. */ int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots) { @@ -1759,11 +1889,11 @@ int input_register_device(struct input_dev *dev) dev->rep[REP_PERIOD] = 33; } - if (!dev->getkeycode) - dev->getkeycode = input_default_getkeycode; + if (!dev->getkeycode && !dev->getkeycode_new) + dev->getkeycode_new = input_default_getkeycode; - if (!dev->setkeycode) - dev->setkeycode = input_default_setkeycode; + if (!dev->setkeycode && !dev->setkeycode_new) + dev->setkeycode_new = input_default_setkeycode; dev_set_name(&dev->dev, "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); |