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hid: support absolute positions

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Matheus
2026-05-12 21:06:47 -03:00
parent 885a6d8a9f
commit 62f8b8cddc
1 changed files with 68 additions and 22 deletions
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kernel-src/io/usb/class/hid_parser.c
+68 -22
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@@ -643,14 +643,12 @@ static void hid_emit_event_keyboard_keypad(hid_application_t *application, hid_i
}
static uint16_t hid_generic_desktop_to_input_rel(uint32_t usage);
static uint16_t hid_generic_desktop_to_input_abs(uint32_t usage);
static void hid_emit_event_generic_desktop(hid_input_t *input, hid_usage_t *usage, size_t idx, uint64_t value, input_event_t *events, size_t *events_emitted) {
if (input->flags & HID_INPUT_CONSTANT)
return;
if ((input->flags & HID_INPUT_RELATIVE) == 0)
return;
uint32_t hid_usage = USAGE(usage->usage);
if (usage->minimum || usage->maximum) {
hid_usage = usage->minimum + idx;
@@ -658,18 +656,30 @@ static void hid_emit_event_generic_desktop(hid_input_t *input, hid_usage_t *usag
return;
}
uint16_t code = hid_generic_desktop_to_input_rel(hid_usage);
if (code > INPUT_REL_MAX)
return;
int64_t signed_value = hid_input_value_signed(input, value);
if (signed_value == 0)
return;
input_event_t event = {0};
event.type = INPUT_EV_REL;
event.code = code;
event.value = signed_value;
if (input->flags & HID_INPUT_RELATIVE) {
if (signed_value == 0)
return;
uint16_t code = hid_generic_desktop_to_input_rel(hid_usage);
if (code > INPUT_REL_MAX)
return;
event.type = INPUT_EV_REL;
event.code = code;
} else {
uint16_t code = hid_generic_desktop_to_input_abs(hid_usage);
if (code > INPUT_ABS_MAX)
return;
event.type = INPUT_EV_ABS;
event.code = code;
}
push_event(event, events, events_emitted);
}
@@ -914,26 +924,62 @@ static uint16_t hid_generic_desktop_to_input_rel(uint32_t usage) {
}
}
static uint16_t hid_generic_desktop_to_input_abs(uint32_t usage) {
switch (usage) {
case HID_GD_X:
return INPUT_ABS_X;
case HID_GD_Y:
return INPUT_ABS_Y;
default:
return INPUT_ABS_MAX + 1;
}
}
static int32_t hid_abs_initial_value(hid_input_t *input) {
if (input->logical_minimum > 0)
return input->logical_minimum;
if (input->logical_maximum < 0)
return input->logical_maximum;
return 0;
}
static void hid_advertise_abs(input_device_t *device, hid_input_t *input, uint16_t code) {
if (code > INPUT_ABS_MAX)
return;
bitmap_set(&device->ev_bits, INPUT_EV_ABS, 1);
bitmap_set(&device->abs_bits, code, 1);
device->abs_info[code].value = hid_abs_initial_value(input);
device->abs_info[code].min = input->logical_minimum;
device->abs_info[code].max = input->logical_maximum;
}
static void hid_advertise_generic_desktop(input_device_t *device, hid_input_t *input, hid_usage_t *usage) {
if (input->flags & HID_INPUT_CONSTANT)
return;
if ((input->flags & HID_INPUT_RELATIVE) == 0)
return;
if (usage->minimum == 0 && usage->maximum == 0) {
uint16_t code = hid_generic_desktop_to_input_rel(USAGE(usage->usage));
if (code <= INPUT_REL_MAX) {
bitmap_set(&device->ev_bits, INPUT_EV_REL, 1);
bitmap_set(&device->rel_bits, code, 1);
uint32_t hid_usage = USAGE(usage->usage);
if (input->flags & HID_INPUT_RELATIVE) {
uint16_t code = hid_generic_desktop_to_input_rel(hid_usage);
if (code <= INPUT_REL_MAX) {
bitmap_set(&device->ev_bits, INPUT_EV_REL, 1);
bitmap_set(&device->rel_bits, code, 1);
}
} else {
hid_advertise_abs(device, input, hid_generic_desktop_to_input_abs(hid_usage));
}
}
for (uint32_t hid_usage = usage->minimum; hid_usage <= usage->maximum && hid_usage <= HID_GD_WHEEL; ++hid_usage) {
uint16_t code = hid_generic_desktop_to_input_rel(hid_usage);
if (code <= INPUT_REL_MAX) {
bitmap_set(&device->ev_bits, INPUT_EV_REL, 1);
bitmap_set(&device->rel_bits, code, 1);
if (input->flags & HID_INPUT_RELATIVE) {
uint16_t code = hid_generic_desktop_to_input_rel(hid_usage);
if (code <= INPUT_REL_MAX) {
bitmap_set(&device->ev_bits, INPUT_EV_REL, 1);
bitmap_set(&device->rel_bits, code, 1);
}
} else {
hid_advertise_abs(device, input, hid_generic_desktop_to_input_abs(hid_usage));
}
}
}