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keyboard: Use BIOS Keyboard variable to set Numlock 

The PC BIOS does provide a NUMLOCK flag containing the desired state
of this LED. This patch sets the current state according to the data
in the bios.

[ hpa: fixed __weak declaration without definition, changed "inline"
  to "static inline" ]

Signed-Off-By: Joshua Cov <joshuacov@googlemail.com>
Link: http://lkml.kernel.org/r/CAKL7Q7rvq87TNS1T_Km8fW_5OzS%2BSbYazLXKxW-6ztOxo3zorg@mail.gmail.com
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Joshua Cov 2012-04-13 21:08:26 +02:00 committed by H. Peter Anvin
parent c2c21e9bb1
commit b2d0b7a061
5 changed files with 58 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/parisc/include/asm/kbdleds.h Normal file
View File

@ -0,0 +1,19 @@
#ifndef _ASM_PARISC_KBDLEDS_H
#define _ASM_PARISC_KBDLEDS_H
/*
* On HIL keyboards of PARISC machines there is no NumLock key and
* everyone expects the keypad to be used for numbers. That's why
* we can safely turn on the NUMLOCK bit.
*/
static inline int kbd_defleds(void)
{
#if defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD)
return 1 << VC_NUMLOCK;
#else
return 0;
#endif
}
#endif /* _ASM_PARISC_KBDLEDS_H */

18
arch/x86/boot/main.c
View File

@ -57,14 +57,20 @@ static void copy_boot_params(void)
}
/*
* Set the keyboard repeat rate to maximum. Unclear why this
* Query the keyboard lock status as given by the BIOS, and
* set the keyboard repeat rate to maximum. Unclear why the latter
* is done here; this might be possible to kill off as stale code.
*/
static void keyboard_set_repeat(void)
static void keyboard_init(void)
{
struct biosregs ireg;
struct biosregs ireg, oreg;
initregs(&ireg);
ireg.ax = 0x0305;
ireg.ah = 0x02; /* Get keyboard status */
intcall(0x16, &ireg, &oreg);
boot_params.kbd_status = oreg.al;
ireg.ax = 0x0305; /* Set keyboard repeat rate */
intcall(0x16, &ireg, NULL);
}
@ -151,8 +157,8 @@ void main(void)
/* Detect memory layout */
detect_memory();
/* Set keyboard repeat rate (why?) */
keyboard_set_repeat();
/* Set keyboard repeat rate (why?) and query the lock flags */
keyboard_init();
/* Query MCA information */
query_mca();

3
arch/x86/include/asm/bootparam.h
View File

@ -112,7 +112,8 @@ struct boot_params {
__u8 e820_entries; /* 0x1e8 */
__u8 eddbuf_entries; /* 0x1e9 */
__u8 edd_mbr_sig_buf_entries; /* 0x1ea */
__u8 _pad6[6]; /* 0x1eb */
__u8 kbd_status; /* 0x1eb */
__u8 _pad6[5]; /* 0x1ec */
struct setup_header hdr; /* setup header */ /* 0x1f1 */
__u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
__u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */

17
arch/x86/include/asm/kbdleds.h Normal file
View File

@ -0,0 +1,17 @@
#ifndef _ASM_X86_KBDLEDS_H
#define _ASM_X86_KBDLEDS_H
/*
* Some laptops take the 789uiojklm,. keys as number pad when NumLock is on.
* This seems a good reason to start with NumLock off. That's why on X86 we
* ask the bios for the correct state.
*/
#include <asm/setup.h>
static inline int kbd_defleds(void)
{
return boot_params.kbd_status & 0x20 ? (1 << VC_NUMLOCK) : 0;
}
#endif /* _ASM_X86_KBDLEDS_H */

20
drivers/tty/vt/keyboard.c
View File

@ -53,17 +53,13 @@ extern void ctrl_alt_del(void);
#define KBD_DEFMODE ((1 << VC_REPEAT) | (1 << VC_META))
/*
* Some laptops take the 789uiojklm,. keys as number pad when NumLock is on.
* This seems a good reason to start with NumLock off. On HIL keyboards
* of PARISC machines however there is no NumLock key and everyone expects the
* keypad to be used for numbers.
*/
#if defined(CONFIG_PARISC) && (defined(CONFIG_KEYBOARD_HIL) || defined(CONFIG_KEYBOARD_HIL_OLD))
#define KBD_DEFLEDS (1 << VC_NUMLOCK)
#if defined(CONFIG_X86) || defined(CONFIG_PARISC)
#include <asm/kbdleds.h>
#else
#define KBD_DEFLEDS 0
static inline int kbd_defleds(void)
{
return 0;
}
#endif
#define KBD_DEFLOCK 0
@ -1512,8 +1508,8 @@ int __init kbd_init(void)
int error;
for (i = 0; i < MAX_NR_CONSOLES; i++) {
kbd_table[i].ledflagstate = KBD_DEFLEDS;
kbd_table[i].default_ledflagstate = KBD_DEFLEDS;
kbd_table[i].ledflagstate = kbd_defleds();
kbd_table[i].default_ledflagstate = kbd_defleds();
kbd_table[i].ledmode = LED_SHOW_FLAGS;
kbd_table[i].lockstate = KBD_DEFLOCK;
kbd_table[i].slockstate = 0;