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keyboard: confirmed padding bytes

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This commit is contained in:
Peter Wu
2013-05-07 14:56:15 +02:00
parent 70f33c0906
commit 878ed69e40
1 changed files with 9 additions and 2 deletions
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11
keyboard.txt
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@@ -62,13 +62,20 @@ struct system_control_data {
char button : 2; /* two right-most bits, Big Endian */ char button : 2; /* two right-most bits, Big Endian */
}; };
The 20 ix yy dd.. ... messages below are described as follows:
- 20: Report ID for Logitech Vendor DJ collection (messages are not processed by
the hid-logitech-dj driver but are passed through to the HID layer.)
- yy: descriptor type (system control, consumer control, keyboard, etc.)
- dd..: data, length is dependent on descriptor type.
- Remaining bytes is garbage/padding and can be ignored (confirmed by Nestor
from Logitech).
The following describes what events are generated when a certain flag is toggled The following describes what events are generated when a certain flag is toggled
in the notification register 00. in the notification register 00.
flag 1, bit 1 - controls "System Control" events? flag 1, bit 1 - controls "System Control" events?
Format: Format:
(disabled bit) 20 ix 04 XX ... (other 11 bytes seems to be noise) (disabled bit) 20 ix 04 XX ... (other 11 bytes is padding)
(enabled bit) 10 ix 04 XX 00 00 00 (enabled bit) 10 ix 04 XX 00 00 00
Values for XX: Values for XX:
- 01: Sleep Button (Fn + F8) - 01: Sleep Button (Fn + F8)
@@ -76,7 +83,7 @@ Values for XX:
flag 1, bit 0 - controls "Consumer Control" events? flag 1, bit 0 - controls "Consumer Control" events?
Format: Format:
(disabled bit) 20 ix 03 XX xx YY yy ... (other 8 bytes seems to be noise) (disabled bit) 20 ix 03 XX xx YY yy ... (other 8 bytes is padding)
(enabled bit) 10 ix 03 XX xx YY yy (enabled bit) 10 ix 03 XX xx YY yy
XX xx and YY yy are two buttons that are pressed according to the keyboard (see XX xx and YY yy are two buttons that are pressed according to the keyboard (see
also struct consumer_control_data above). also struct consumer_control_data above).