diff options
| -rw-r--r-- | drivers/hid/hid-input.c | 34 | ||||
| -rw-r--r-- | include/linux/hid.h | 4 |
2 files changed, 35 insertions, 3 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 8770d9a2b2af..61d91117f4ae 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -48,6 +48,25 @@ static const struct { __s32 y; } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; +/* + * hid-input will convert this list into priorities: + * the first element will have the highest priority + * (the length of the following array) and the last + * element the lowest (1). + * + * hid-input will then shift the priority by 8 bits to leave some space + * in case drivers want to interleave other fields. + * + * If drivers want to add fields before those, hid-input will + * leave out the first 8 bits of the priority value. + * + * This still leaves us 65535 individual priority values. + */ +static const __u32 hidinput_usages_priorities[] = { + HID_DG_INVERT, /* Invert must always come before In Range */ + HID_DG_INRANGE, +}; + #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) @@ -586,11 +605,12 @@ static bool hidinput_field_in_collection(struct hid_device *device, struct hid_f } static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, - struct hid_usage *usage) + struct hid_usage *usage, unsigned int usage_index) { struct input_dev *input = hidinput->input; struct hid_device *device = input_get_drvdata(input); int max = 0, code; + unsigned int i = 0; unsigned long *bit = NULL; field->hidinput = hidinput; @@ -608,6 +628,15 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel goto ignore; } + /* assign a priority based on the static list declared here */ + for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { + if (usage->hid == hidinput_usages_priorities[i]) { + field->usages_priorities[usage_index] = + (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; + break; + } + } + if (device->driver->input_mapping) { int ret = device->driver->input_mapping(device, hidinput, field, usage, &bit, &max); @@ -1962,7 +1991,8 @@ static inline void hidinput_configure_usages(struct hid_input *hidinput, for (i = 0; i < report->maxfield; i++) for (j = 0; j < report->field[i]->maxusage; j++) hidinput_configure_usage(hidinput, report->field[i], - report->field[i]->usage + j); + report->field[i]->usage + j, + j); } /* diff --git a/include/linux/hid.h b/include/linux/hid.h index f25020c0d6b8..eaad0655b05c 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -477,7 +477,9 @@ struct hid_field { unsigned report_type; /* (input,output,feature) */ __s32 *value; /* last known value(s) */ __s32 *new_value; /* newly read value(s) */ - __s32 *usages_priorities; /* priority of each usage when reading the report */ + __s32 *usages_priorities; /* priority of each usage when reading the report + * bits 8-16 are reserved for hid-input usage + */ __s32 logical_minimum; __s32 logical_maximum; __s32 physical_minimum; |