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Subject[RFCv5 1/2] HID: core: Add support for USI style events
Date
Add support for Universal Stylus Interface (USI) style events to the HID
core and input layers.

Signed-off-by: Tero Kristo <tero.kristo@linux.intel.com>
---
drivers/hid/hid-debug.c | 9 +++++-
drivers/hid/hid-input.c | 40 ++++++++++++++++++++++++++
include/linux/mod_devicetable.h | 2 +-
include/uapi/linux/input-event-codes.h | 26 +++++++++++------
4 files changed, 67 insertions(+), 10 deletions(-)

diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index 26c31d759914..18035c63c358 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -1025,7 +1025,14 @@ static const char *absolutes[ABS_CNT] = {

static const char *misc[MSC_MAX + 1] = {
[MSC_SERIAL] = "Serial", [MSC_PULSELED] = "Pulseled",
- [MSC_GESTURE] = "Gesture", [MSC_RAW] = "RawData"
+ [MSC_GESTURE] = "Gesture", [MSC_RAW] = "RawData",
+ [MSC_PEN_ID] = "PenID", [MSC_PEN_COLOR] "PenColor",
+ [MSC_PEN_LINE_STYLE_INK] = "PenLineStyleInk",
+ [MSC_PEN_LINE_STYLE_PENCIL] = "PenLineStylePencil",
+ [MSC_PEN_LINE_STYLE_HIGHLIGHTER] = "PenLineStyleHighlighter",
+ [MSC_PEN_LINE_STYLE_CHISEL_MARKER] = "PenLineStyleChiselMarker",
+ [MSC_PEN_LINE_STYLE_BRUSH] = "PenLineStyleBrush",
+ [MSC_PEN_LINE_STYLE_NO_PREFERENCE] = "PenLineStyleNoPreference",
};

static const char *leds[LED_MAX + 1] = {
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 1ce75e8b49d5..52c581324491 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -833,6 +833,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
}
break;

+ case 0x38: /* Transducer Index */
+ map_msc(MSC_PEN_ID);
+ goto ignore;
+
case 0x3b: /* Battery Strength */
hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
usage->type = EV_PWR;
@@ -880,6 +884,42 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
map_msc(MSC_SERIAL);
break;

+ case 0x5c: /* Digitizer Preferred Color */
+ map_msc(MSC_PEN_COLOR);
+ break;
+
+ case 0x5e: /* Digitizer Preferred Line Width */
+ map_abs_clear(ABS_TOOL_WIDTH);
+ break;
+
+ case 0x70: /* Preferred Line Style -> not an input usage */
+ case 0x71: /* Preferred Line Style is Locked */
+ goto ignore;
+
+ case 0x72: /* Ink */
+ map_msc(MSC_PEN_LINE_STYLE_INK);
+ break;
+
+ case 0x73: /* Pencil */
+ map_msc(MSC_PEN_LINE_STYLE_PENCIL);
+ break;
+
+ case 0x74: /* Highlighter */
+ map_msc(MSC_PEN_LINE_STYLE_HIGHLIGHTER);
+ break;
+
+ case 0x75: /* Chisel Marker */
+ map_msc(MSC_PEN_LINE_STYLE_CHISEL_MARKER);
+ break;
+
+ case 0x76: /* Brush */
+ map_msc(MSC_PEN_LINE_STYLE_BRUSH);
+ break;
+
+ case 0x77: /* No Preference */
+ map_msc(MSC_PEN_LINE_STYLE_NO_PREFERENCE);
+ break;
+
default: goto unknown;
}
break;
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 4bb71979a8fd..bf2b76a6e7e8 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 0x0d
#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..0ebfc92dacf5 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -901,14 +901,24 @@
* 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_STYLE_INK 0x08
+#define MSC_PEN_LINE_STYLE_PENCIL 0x09
+#define MSC_PEN_LINE_STYLE_HIGHLIGHTER 0x0a
+#define MSC_PEN_LINE_STYLE_CHISEL_MARKER 0x0b
+#define MSC_PEN_LINE_STYLE_BRUSH 0x0c
+#define MSC_PEN_LINE_STYLE_NO_PREFERENCE 0x0d
+/* TODO: Add USI diagnostic & battery events too */
+#define MSC_MAX 0x0d
+#define MSC_CNT (MSC_MAX + 1)

/*
* LEDs
--
2.25.1
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