diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/core/pc_kbd.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/core/pc_kbd.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/pc_kbd.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/core/pc_kbd.c b/qemu/roms/ipxe/src/core/pc_kbd.c new file mode 100644 index 000000000..42df755b5 --- /dev/null +++ b/qemu/roms/ipxe/src/core/pc_kbd.c @@ -0,0 +1,112 @@ +/* Minimal polling PC keyboard driver + * - No interrupt + * - No LED + * - No special keys + * + * still Enough For Me to type a filename. + * + * 2003-07 by SONE Takesh + * 2004-04 moved by LYH From filo to Etherboot + * yhlu@tyan.com + */ + +#include <ipxe/io.h> +#include <ipxe/console.h> + +static char key_map[][128] = { + { + "\0\x1b""1234567890-=\b\t" + "qwertyuiop[]\r\0as" + "dfghjkl;'`\0\\zxcv" + "bnm,./\0*\0 \0\0\0\0\0\0" + "\0\0\0\0\0\0\0""789-456+1" + "230." + },{ + "\0\x1b""!@#$%^&*()_+\b\t" + "QWERTYUIOP{}\r\0AS" + "DFGHJKL:\"~\0|ZXCV" + "BNM<>?\0\0\0 \0\0\0\0\0\0" + "\0\0\0\0\0\0\0""789-456+1" + "230." + } +}; + +static int cur_scan; +static unsigned int shift_state; +#define SHIFT 1 +#define CONTROL 2 +#define CAPS 4 + +static int get_scancode(void) +{ + int scan; + + if ((inb(0x64) & 1) == 0) + return 0; + scan = inb(0x60); + + switch (scan) { + case 0x2a: + case 0x36: + shift_state |= SHIFT; + break; + case 0xaa: + case 0xb6: + shift_state &= ~SHIFT; + break; + case 0x1d: + shift_state |= CONTROL; + break; + case 0x9d: + shift_state &= ~CONTROL; + break; + case 0x3a: + shift_state ^= CAPS; + break; + } + + if (scan & 0x80) + return 0; /* ignore break code or 0xe0 etc! */ + return scan; +} + +static int kbd_havekey(void) +{ + if (!cur_scan) + cur_scan = get_scancode(); + return cur_scan != 0; +} + +static int kbd_ischar(void) +{ + if (!kbd_havekey()) + return 0; + if (!key_map[shift_state & SHIFT][cur_scan]) { + cur_scan = 0; + return 0; + } + return 1; +} + +static int kbd_getc(void) +{ + int c; + + while (!kbd_ischar()) + ; + c = key_map[shift_state & SHIFT][cur_scan]; + if (shift_state & (CONTROL | CAPS)) { + if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) { + if (shift_state & CONTROL) + c &= 0x1f; + else if (shift_state & CAPS) + c ^= ('A' ^ 'a'); + } + } + cur_scan = 0; + return c; +} + +struct console_driver pc_kbd_console __console_driver = { + .getchar = kbd_getc, +}; |