Re: [PATCH 02/18] Input: add FF_HID effect type

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

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

diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index ee3127461ee0..0d4d426cf75a 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_id: 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

 /*
--

2.34.1.307.g9b7440fafd-goog