diff options
| -rw-r--r-- | drivers/hid/hid-input.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index a87b059f866..7f817897b17 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -240,6 +240,89 @@ static inline void hidinput_pb_setup(struct input_dev *input) } #endif +static inline int match_scancode(int code, int scancode) +{ + if (scancode == 0) + return 1; + return ((code & (HID_USAGE_PAGE | HID_USAGE)) == scancode); +} + +static inline int match_keycode(int code, int keycode) +{ + if (keycode == 0) + return 1; + return (code == keycode); +} + +static struct hid_usage *hidinput_find_key(struct hid_device *hid, + int scancode, int keycode) +{ + int i, j, k; + struct hid_report *report; + struct hid_usage *usage; + + for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { + list_for_each_entry(report, &hid->report_enum[k].report_list, list) { + for (i = 0; i < report->maxfield; i++) { + for ( j = 0; j < report->field[i]->maxusage; j++) { + usage = report->field[i]->usage + j; + if (usage->type == EV_KEY && + match_scancode(usage->hid, scancode) && + match_keycode(usage->code, keycode)) + return usage; + } + } + } + } + return NULL; +} + +static int hidinput_getkeycode(struct input_dev *dev, int scancode, + int *keycode) +{ + struct hid_device *hid = dev->private; + struct hid_usage *usage; + + usage = hidinput_find_key(hid, scancode, 0); + if (usage) { + *keycode = usage->code; + return 0; + } + return -EINVAL; +} + +static int hidinput_setkeycode(struct input_dev *dev, int scancode, + int keycode) +{ + struct hid_device *hid = dev->private; + struct hid_usage *usage; + int old_keycode; + + if (keycode < 0 || keycode > KEY_MAX) + return -EINVAL; + + usage = hidinput_find_key(hid, scancode, 0); + if (usage) { + old_keycode = usage->code; + usage->code = keycode; + + clear_bit(old_keycode, dev->keybit); + set_bit(usage->code, dev->keybit); +#ifdef CONFIG_HID_DEBUG + printk (KERN_DEBUG "Assigned keycode %d to HID usage code %x\n", keycode, scancode); +#endif + /* Set the keybit for the old keycode if the old keycode is used + * by another key */ + if (hidinput_find_key (hid, 0, old_keycode)) + set_bit(old_keycode, dev->keybit); + + return 0; + } + + return -EINVAL; +} + + static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, struct hid_usage *usage) { @@ -919,6 +1002,8 @@ int hidinput_connect(struct hid_device *hid) input_dev->event = hid->hidinput_input_event; input_dev->open = hidinput_open; input_dev->close = hidinput_close; + input_dev->setkeycode = hidinput_setkeycode; + input_dev->getkeycode = hidinput_getkeycode; input_dev->name = hid->name; input_dev->phys = hid->phys; |