You've already forked linux-t2-patches
mirror of
https://github.com/t2linux/linux-t2-patches.git
synced 2026-04-30 13:52:11 -07:00
Aditya Garg
116 lines
3.7 KiB
Diff
116 lines
3.7 KiB
Diff
From 75ca57b64ce6846622d8aefac5a76fc638a2123d Mon Sep 17 00:00:00 2001
|
|
From: Kerem Karabay <kekrby@gmail.com>
|
|
Date: Sun, 5 Mar 2023 19:12:53 +0300
|
|
Subject: [PATCH 01/12] HID: core: add helper for finding a field with a
|
|
certain usage
|
|
|
|
This helper will allow HID drivers to easily determine if they should
|
|
bind to a hid_device by checking for the prescence of a certain field
|
|
when its ID is not enough, which can be the case on USB devices with
|
|
multiple interfaces and/or configurations.
|
|
|
|
Signed-off-by: Kerem Karabay <kekrby@gmail.com>
|
|
---
|
|
drivers/hid/hid-core.c | 25 +++++++++++++++++++++++++
|
|
drivers/hid/hid-google-hammer.c | 27 ++-------------------------
|
|
include/linux/hid.h | 2 ++
|
|
3 files changed, 29 insertions(+), 25 deletions(-)
|
|
|
|
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
|
|
index 8992e3c1e..6395bdc2e 100644
|
|
--- a/drivers/hid/hid-core.c
|
|
+++ b/drivers/hid/hid-core.c
|
|
@@ -1906,6 +1906,31 @@ int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
|
|
}
|
|
EXPORT_SYMBOL_GPL(hid_set_field);
|
|
|
|
+struct hid_field *hid_find_field(struct hid_device *hdev, unsigned int report_type,
|
|
+ unsigned int application, unsigned int usage)
|
|
+{
|
|
+ struct list_head *report_list = &hdev->report_enum[report_type].report_list;
|
|
+ struct hid_report *report;
|
|
+ int i, j;
|
|
+
|
|
+ list_for_each_entry(report, report_list, list) {
|
|
+ if (report->application != application)
|
|
+ continue;
|
|
+
|
|
+ for (i = 0; i < report->maxfield; i++) {
|
|
+ struct hid_field *field = report->field[i];
|
|
+
|
|
+ for (j = 0; j < field->maxusage; j++) {
|
|
+ if (field->usage[j].hid == usage)
|
|
+ return field;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return NULL;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(hid_find_field);
|
|
+
|
|
static struct hid_report *hid_get_report(struct hid_report_enum *report_enum,
|
|
const u8 *data)
|
|
{
|
|
diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c
|
|
index c6bdb9c4e..fba3652aa 100644
|
|
--- a/drivers/hid/hid-google-hammer.c
|
|
+++ b/drivers/hid/hid-google-hammer.c
|
|
@@ -419,38 +419,15 @@ static int hammer_event(struct hid_device *hid, struct hid_field *field,
|
|
return 0;
|
|
}
|
|
|
|
-static bool hammer_has_usage(struct hid_device *hdev, unsigned int report_type,
|
|
- unsigned application, unsigned usage)
|
|
-{
|
|
- struct hid_report_enum *re = &hdev->report_enum[report_type];
|
|
- struct hid_report *report;
|
|
- int i, j;
|
|
-
|
|
- list_for_each_entry(report, &re->report_list, list) {
|
|
- if (report->application != application)
|
|
- continue;
|
|
-
|
|
- for (i = 0; i < report->maxfield; i++) {
|
|
- struct hid_field *field = report->field[i];
|
|
-
|
|
- for (j = 0; j < field->maxusage; j++)
|
|
- if (field->usage[j].hid == usage)
|
|
- return true;
|
|
- }
|
|
- }
|
|
-
|
|
- return false;
|
|
-}
|
|
-
|
|
static bool hammer_has_folded_event(struct hid_device *hdev)
|
|
{
|
|
- return hammer_has_usage(hdev, HID_INPUT_REPORT,
|
|
+ return !!hid_find_field(hdev, HID_INPUT_REPORT,
|
|
HID_GD_KEYBOARD, HID_USAGE_KBD_FOLDED);
|
|
}
|
|
|
|
static bool hammer_has_backlight_control(struct hid_device *hdev)
|
|
{
|
|
- return hammer_has_usage(hdev, HID_OUTPUT_REPORT,
|
|
+ return !!hid_find_field(hdev, HID_OUTPUT_REPORT,
|
|
HID_GD_KEYBOARD, HID_AD_BRIGHTNESS);
|
|
}
|
|
|
|
diff --git a/include/linux/hid.h b/include/linux/hid.h
|
|
index 39e21e381..9520fdfdd 100644
|
|
--- a/include/linux/hid.h
|
|
+++ b/include/linux/hid.h
|
|
@@ -913,6 +913,8 @@ extern void hidinput_report_event(struct hid_device *hid, struct hid_report *rep
|
|
extern int hidinput_connect(struct hid_device *hid, unsigned int force);
|
|
extern void hidinput_disconnect(struct hid_device *);
|
|
|
|
+struct hid_field *hid_find_field(struct hid_device *hdev, unsigned int report_type,
|
|
+ unsigned int application, unsigned int usage);
|
|
int hid_set_field(struct hid_field *, unsigned, __s32);
|
|
int hid_input_report(struct hid_device *hid, enum hid_report_type type, u8 *data, u32 size,
|
|
int interrupt);
|
|
--
|
|
2.42.0
|
|
|