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hidmap: Implement forbidden flag for hidmap item.

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If HID usage is mapped to evdev event by hidmap item marked with this
flag than entire driver attachment is blocked.

MFC after:	2 week
This commit is contained in:
Vladimir Kondratyev 2021-09-02 22:31:51 +03:00
parent 0075742d18
commit cded1fdb37
2 changed files with 6 additions and 2 deletions
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5
sys/dev/hid/hidmap.c
View file

@ -481,7 +481,10 @@ hidmap_probe_hid_descr(void *d_ptr, hid_size_t d_len, uint8_t tlc_index,
/* Check that all mandatory usages are present in report descriptor */
if (items != 0) {
for (i = 0; i < nitems_map; i++) {
if (map[i].required && isclr(caps, i)) {
KASSERT(!(map[i].required && map[i].forbidden),
("both required & forbidden item flags are set"));
if ((map[i].required && isclr(caps, i)) ||
(map[i].forbidden && isset(caps, i))) {
items = 0;
break;
}

3
sys/dev/hid/hidmap.h
View file

@ -98,7 +98,8 @@ struct hidmap_item {
bool has_cb:1;
bool final_cb:1;
bool invert_value:1;
u_int reserved:10;
bool forbidden:1; /* Forbidden by driver */
u_int reserved:9;
};
#define HIDMAP_ANY(_page, _usage, _type, _code) \