HID: hid-microsoft: Add support for scrollwheel and special keypad keys

The Microsoft Office keyboard has a scrollwheel as well as some special keys
above the keypad which are handled through the custom MS usage page, this
commit adds support for these.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 48 insertions, 1 deletions

diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index 5268dec5d81a..fe415e8ed7c4 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -68,6 +68,26 @@ static int ms_ergonomy_kb_quirk(struct hid_input *hi, struct hid_usage *usage,
         switch (usage->hid & HID_USAGE) {
         case 0xfd06: ms_map_key_clear(KEY_CHAT);        break;
         case 0xfd07: ms_map_key_clear(KEY_PHONE);       break;
+        case 0xff00:
+                /* Special keypad keys */
+                ms_map_key_clear(KEY_KPEQUAL);
+                set_bit(KEY_KPLEFTPAREN, input->keybit);
+                set_bit(KEY_KPRIGHTPAREN, input->keybit);
+                break;
+        case 0xff01:
+                /* Scroll wheel */
+                hid_map_usage_clear(hi, usage, bit, max, EV_REL, REL_WHEEL);
+                break;
+        case 0xff02:
+                /*
+                 * This byte contains a copy of the modifier keys byte of a
+                 * standard hid keyboard report, as send by interface 0
+                 * (this usage is found on interface 1).
+                 *
+                 * This byte only gets send when another key in the same report
+                 * changes state, and as such is useless, ignore it.
+                 */
+                return -1;
         case 0xff05:
                 set_bit(EV_REP, input->evbit);
                 ms_map_key_clear(KEY_F13);
@@ -137,14 +157,39 @@ static int ms_event(struct hid_device *hdev, struct hid_field *field,
                 struct hid_usage *usage, __s32 value)
 {
         unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
+        struct input_dev *input;
 
         if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
                         !usage->type)
                 return 0;
 
+        input = field->hidinput->input;
+
         /* Handling MS keyboards special buttons */
+        if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff00)) {
+                /* Special keypad keys */
+                input_report_key(input, KEY_KPEQUAL, value & 0x01);
+                input_report_key(input, KEY_KPLEFTPAREN, value & 0x02);
+                input_report_key(input, KEY_KPRIGHTPAREN, value & 0x04);
+                return 1;
+        }
+
+        if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff01)) {
+                /* Scroll wheel */
+                int step = ((value & 0x60) >> 5) + 1;
+
+                switch (value & 0x1f) {
+                case 0x01:
+                        input_report_rel(input, REL_WHEEL, step);
+                        break;
+                case 0x1f:
+                        input_report_rel(input, REL_WHEEL, -step);
+                        break;
+                }
+                return 1;
+        }
+
         if (quirks & MS_ERGONOMY && usage->hid == (HID_UP_MSVENDOR | 0xff05)) {
-                struct input_dev *input = field->hidinput->input;
                 static unsigned int last_key = 0;
                 unsigned int key = 0;
                 switch (value) {
@@ -197,6 +242,8 @@ err_free:
 static const struct hid_device_id ms_devices[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_SIDEWINDER_GV),
                 .driver_data = MS_HIDINPUT },
+        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_OFFICE_KB),
+                .driver_data = MS_ERGONOMY },
         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K),
                 .driver_data = MS_ERGONOMY },
         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_NE4K_JP),