diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/input/notifier.txt | 52 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 | ||||
| -rw-r--r-- | Documentation/mca.txt | 17 |
3 files changed, 59 insertions, 12 deletions
diff --git a/Documentation/input/notifier.txt b/Documentation/input/notifier.txt new file mode 100644 index 00000000000..95172ca6f3d --- /dev/null +++ b/Documentation/input/notifier.txt @@ -0,0 +1,52 @@ +Keyboard notifier + +One can use register_keyboard_notifier to get called back on keyboard +events (see kbd_keycode() function for details). The passed structure is +keyboard_notifier_param: + +- 'vc' always provide the VC for which the keyboard event applies; +- 'down' is 1 for a key press event, 0 for a key release; +- 'shift' is the current modifier state, mask bit indexes are KG_*; +- 'value' depends on the type of event. + +- KBD_KEYCODE events are always sent before other events, value is the keycode. +- KBD_UNBOUND_KEYCODE events are sent if the keycode is not bound to a keysym. + value is the keycode. +- KBD_UNICODE events are sent if the keycode -> keysym translation produced a + unicode character. value is the unicode value. +- KBD_KEYSYM events are sent if the keycode -> keysym translation produced a + non-unicode character. value is the keysym. +- KBD_POST_KEYSYM events are sent after the treatment of non-unicode keysyms. + That permits one to inspect the resulting LEDs for instance. + +For each kind of event but the last, the callback may return NOTIFY_STOP in +order to "eat" the event: the notify loop is stopped and the keyboard event is +dropped. + +In a rough C snippet, we have: + +kbd_keycode(keycode) { + ... + params.value = keycode; + if (notifier_call_chain(KBD_KEYCODE,¶ms) == NOTIFY_STOP) + || !bound) { + notifier_call_chain(KBD_UNBOUND_KEYCODE,¶ms); + return; + } + + if (unicode) { + param.value = unicode; + if (notifier_call_chain(KBD_UNICODE,¶ms) == NOTIFY_STOP) + return; + emit unicode; + return; + } + + params.value = keysym; + if (notifier_call_chain(KBD_KEYSYM,¶ms) == NOTIFY_STOP) + return; + apply keysym; + notifier_call_chain(KBD_POST_KEYSYM,¶ms); +} + +NOTE: This notifier is usually called from interrupt context. diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 622f7849edb..650b0d8aa89 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -732,6 +732,8 @@ and is between 256 and 4096 characters. It is defined in the file (Don't attempt to blink the leds) i8042.noaux [HW] Don't check for auxiliary (== mouse) port i8042.nokbd [HW] Don't check/create keyboard port + i8042.noloop [HW] Disable the AUX Loopback command while probing + for the AUX port i8042.nomux [HW] Don't check presence of an active multiplexing controller i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX diff --git a/Documentation/mca.txt b/Documentation/mca.txt index aabce4ad90f..510375d4209 100644 --- a/Documentation/mca.txt +++ b/Documentation/mca.txt @@ -143,14 +143,7 @@ MCA Device Drivers Currently, there are a number of MCA-specific device drivers. -1) PS/2 ESDI - drivers/block/ps2esdi.c - include/linux/ps2esdi.h - Uses major number 36, and should use /dev files /dev/eda, /dev/edb. - Supports two drives, but only one controller. May use the - command-line args "ed=cyl,head,sec" and "tp720". - -2) PS/2 SCSI +1) PS/2 SCSI drivers/scsi/ibmmca.c drivers/scsi/ibmmca.h The driver for the IBM SCSI subsystem. Includes both integrated @@ -159,25 +152,25 @@ Currently, there are a number of MCA-specific device drivers. machine with a front-panel display (i.e. model 95), you can use "ibmmcascsi=display" to enable a drive activity indicator. -3) 3c523 +2) 3c523 drivers/net/3c523.c drivers/net/3c523.h 3Com 3c523 Etherlink/MC ethernet driver. -4) SMC Ultra/MCA and IBM Adapter/A +3) SMC Ultra/MCA and IBM Adapter/A drivers/net/smc-mca.c drivers/net/smc-mca.h Driver for the MCA version of the SMC Ultra and various other OEM'ed and work-alike cards (Elite, Adapter/A, etc). -5) NE/2 +4) NE/2 driver/net/ne2.c driver/net/ne2.h The NE/2 is the MCA version of the NE2000. This may not work with clones that have a different adapter id than the original NE/2. -6) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and +5) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and Reply Sound Blaster/SCSI (SCSI part) Better support for these cards than the driver for ISA. Supports multiple cards with IRQ sharing. |