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Message-Id: <20211104133701.1733551-6-tero.kristo@linux.intel.com>
Date: Thu, 4 Nov 2021 15:36:58 +0200
From: Tero Kristo <tero.kristo@...ux.intel.com>
To: jikos@...nel.org, benjamin.tissoires@...hat.com,
mika.westerberg@...ux.intel.com, tero.kristo@...ux.intel.com
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC 5/8] HID: core: Add support for USI style events
Add support for Universal Stylus Interface (USI) style events to the HID
core and input layers. A new driver will be added in a separate patch
which is going to use this glue logic.
Signed-off-by: Tero Kristo <tero.kristo@...ux.intel.com>
---
drivers/hid/hid-core.c | 3 +++
drivers/hid/hid-input.c | 18 ++++++++++++++++++
include/linux/hid.h | 5 +++++
include/linux/mod_devicetable.h | 2 +-
include/uapi/linux/input-event-codes.h | 22 ++++++++++++++--------
5 files changed, 41 insertions(+), 9 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index dbed2524fd47..194c4bfed1be 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -780,6 +780,9 @@ static void hid_scan_input_usage(struct hid_parser *parser, u32 usage)
if (usage == HID_DG_CONTACTID)
hid->group = HID_GROUP_MULTITOUCH;
+
+ if (usage == HID_DG_TRANSDUCER_INDEX)
+ hid->group = HID_GROUP_USI;
}
static void hid_scan_feature_usage(struct hid_parser *parser, u32 usage)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 0506612800db..426700cd8574 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -829,6 +829,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
}
break;
+ case 0x38: /* Transducer Index */
+ map_msc(MSC_PEN_ID);
+ break;
+
case 0x3b: /* Battery Strength */
hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
usage->type = EV_PWR;
@@ -875,6 +879,20 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
map_msc(MSC_SERIAL);
break;
+ case 0x5c: map_msc(MSC_PEN_COLOR); break;
+ case 0x5e: map_msc(MSC_PEN_LINE_WIDTH); break;
+
+ case 0x70:
+ case 0x71:
+ case 0x72:
+ case 0x73:
+ case 0x74:
+ case 0x75:
+ case 0x76:
+ case 0x77:
+ map_msc(MSC_PEN_LINE_STYLE);
+ break;
+
default: goto unknown;
}
break;
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 555b5de654b1..000fd3cf06ce 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -241,6 +241,7 @@ struct hid_item {
#define HID_DG_TOUCH 0x000d0033
#define HID_DG_UNTOUCH 0x000d0034
#define HID_DG_TAP 0x000d0035
+#define HID_DG_TRANSDUCER_INDEX 0x000d0038
#define HID_DG_TABLETFUNCTIONKEY 0x000d0039
#define HID_DG_PROGRAMCHANGEKEY 0x000d003a
#define HID_DG_BATTERYSTRENGTH 0x000d003b
@@ -253,6 +254,9 @@ struct hid_item {
#define HID_DG_BARRELSWITCH 0x000d0044
#define HID_DG_ERASER 0x000d0045
#define HID_DG_TABLETPICK 0x000d0046
+#define HID_DG_PEN_COLOR 0x000d005c
+#define HID_DG_PEN_LINE_WIDTH 0x000d005e
+#define HID_DG_PEN_LINE_STYLE 0x000d0070
#define HID_CP_CONSUMERCONTROL 0x000c0001
#define HID_CP_NUMERICKEYPAD 0x000c0002
@@ -369,6 +373,7 @@ struct hid_item {
#define HID_GROUP_MULTITOUCH 0x0002
#define HID_GROUP_SENSOR_HUB 0x0003
#define HID_GROUP_MULTITOUCH_WIN_8 0x0004
+#define HID_GROUP_USI 0x0005
/*
* Vendor specific HID device groups
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index ae2e75d15b21..4ff40be7676b 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -322,7 +322,7 @@ struct pcmcia_device_id {
#define INPUT_DEVICE_ID_KEY_MAX 0x2ff
#define INPUT_DEVICE_ID_REL_MAX 0x0f
#define INPUT_DEVICE_ID_ABS_MAX 0x3f
-#define INPUT_DEVICE_ID_MSC_MAX 0x07
+#define INPUT_DEVICE_ID_MSC_MAX 0x09
#define INPUT_DEVICE_ID_LED_MAX 0x0f
#define INPUT_DEVICE_ID_SND_MAX 0x07
#define INPUT_DEVICE_ID_FF_MAX 0x7f
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 225ec87d4f22..98295f71941a 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -901,14 +901,20 @@
* Misc events
*/
-#define MSC_SERIAL 0x00
-#define MSC_PULSELED 0x01
-#define MSC_GESTURE 0x02
-#define MSC_RAW 0x03
-#define MSC_SCAN 0x04
-#define MSC_TIMESTAMP 0x05
-#define MSC_MAX 0x07
-#define MSC_CNT (MSC_MAX+1)
+#define MSC_SERIAL 0x00
+#define MSC_PULSELED 0x01
+#define MSC_GESTURE 0x02
+#define MSC_RAW 0x03
+#define MSC_SCAN 0x04
+#define MSC_TIMESTAMP 0x05
+/* USI Pen events */
+#define MSC_PEN_ID 0x06
+#define MSC_PEN_COLOR 0x07
+#define MSC_PEN_LINE_WIDTH 0x08
+#define MSC_PEN_LINE_STYLE 0x09
+/* TODO: Add USI diagnostic & battery events too */
+#define MSC_MAX 0x09
+#define MSC_CNT (MSC_MAX + 1)
/*
* LEDs
--
2.25.1
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