HID: add hooks for getkeycode() and setkeycode() methods
Provide hooks for getkeycode() and setkeycode() methods to input_dev. Signed-off-by: Marvin Raaijmakers <marvin.raaijmakers@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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@ -240,6 +240,89 @@ static inline void hidinput_pb_setup(struct input_dev *input)
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}
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#endif
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static inline int match_scancode(int code, int scancode)
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{
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if (scancode == 0)
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return 1;
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return ((code & (HID_USAGE_PAGE | HID_USAGE)) == scancode);
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}
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static inline int match_keycode(int code, int keycode)
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{
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if (keycode == 0)
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return 1;
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return (code == keycode);
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}
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static struct hid_usage *hidinput_find_key(struct hid_device *hid,
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int scancode, int keycode)
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{
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int i, j, k;
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struct hid_report *report;
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struct hid_usage *usage;
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for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
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list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
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for (i = 0; i < report->maxfield; i++) {
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for ( j = 0; j < report->field[i]->maxusage; j++) {
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usage = report->field[i]->usage + j;
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if (usage->type == EV_KEY &&
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match_scancode(usage->hid, scancode) &&
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match_keycode(usage->code, keycode))
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return usage;
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}
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}
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}
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}
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return NULL;
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}
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static int hidinput_getkeycode(struct input_dev *dev, int scancode,
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int *keycode)
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{
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struct hid_device *hid = dev->private;
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struct hid_usage *usage;
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usage = hidinput_find_key(hid, scancode, 0);
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if (usage) {
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*keycode = usage->code;
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return 0;
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}
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return -EINVAL;
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}
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static int hidinput_setkeycode(struct input_dev *dev, int scancode,
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int keycode)
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{
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struct hid_device *hid = dev->private;
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struct hid_usage *usage;
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int old_keycode;
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if (keycode < 0 || keycode > KEY_MAX)
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return -EINVAL;
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usage = hidinput_find_key(hid, scancode, 0);
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if (usage) {
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old_keycode = usage->code;
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usage->code = keycode;
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clear_bit(old_keycode, dev->keybit);
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set_bit(usage->code, dev->keybit);
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#ifdef CONFIG_HID_DEBUG
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printk (KERN_DEBUG "Assigned keycode %d to HID usage code %x\n", keycode, scancode);
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#endif
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/* Set the keybit for the old keycode if the old keycode is used
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* by another key */
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if (hidinput_find_key (hid, 0, old_keycode))
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set_bit(old_keycode, dev->keybit);
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return 0;
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}
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return -EINVAL;
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}
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static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
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struct hid_usage *usage)
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{
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@ -919,6 +1002,8 @@ int hidinput_connect(struct hid_device *hid)
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input_dev->event = hid->hidinput_input_event;
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input_dev->open = hidinput_open;
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input_dev->close = hidinput_close;
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input_dev->setkeycode = hidinput_setkeycode;
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input_dev->getkeycode = hidinput_getkeycode;
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input_dev->name = hid->name;
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input_dev->phys = hid->phys;
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