[v2,02/16] Input: add FF_HID effect type

Commit Message

Angela Czubak Jan. 14, 2022, 6:31 p.m. UTC

FF_HID effect type can be used to trigger haptic feedback with HID simple
haptic usages.

Signed-off-by: Angela Czubak <[e-mail]>
---
 include/uapi/linux/input.h | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

Patch

diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index ee3127461ee0..ccf43a21d43d 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -424,6 +424,24 @@  struct ff_rumble_effect {
 	__u16 weak_magnitude;
 };
 
+/**
+ * struct ff_hid_effect
+ * @hid_usage: hid_usage according to Haptics page (WAVEFORM_CLICK, etc.)
+ * @vendor_id: the waveform vendor ID if hid_usage is in the vendor-defined range
+ * @vendor_waveform_page: the vendor waveform page if hid_usage is in the vendor-defined range
+ * @intensity: strength of the effect as percentage
+ * @repeat_count: number of times to retrigger effect
+ * @retrigger_period: time before effect is retriggered (in ms)
+ */
+struct ff_hid_effect {
+	__u16 hid_usage;
+	__u16 vendor_id;
+	__u8  vendor_waveform_page;
+	__u16 intensity;
+	__u16 repeat_count;
+	__u16 retrigger_period;
+};
+
 /**
  * struct ff_effect - defines force feedback effect
  * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
@@ -460,6 +478,7 @@  struct ff_effect {
 		struct ff_periodic_effect periodic;
 		struct ff_condition_effect condition[2]; /* One for each axis */
 		struct ff_rumble_effect rumble;
+		struct ff_hid_effect hid;
 	} u;
 };
 
@@ -467,6 +486,7 @@  struct ff_effect {
  * Force feedback effect types
  */
 
+#define FF_HID		0x4f
 #define FF_RUMBLE	0x50
 #define FF_PERIODIC	0x51
 #define FF_CONSTANT	0x52
@@ -476,7 +496,7 @@  struct ff_effect {
 #define FF_INERTIA	0x56
 #define FF_RAMP		0x57
 
-#define FF_EFFECT_MIN	FF_RUMBLE
+#define FF_EFFECT_MIN	FF_HID
 #define FF_EFFECT_MAX	FF_RAMP
 
 /*