[intel] Forcibly skip PHY reset on some models
[ipxe.git] / src / core / pc_kbd.c
1 /* Minimal polling PC keyboard driver
2 * - No interrupt
3 * - No LED
4 * - No special keys
5 *
6 * still Enough For Me to type a filename.
7 *
8 * 2003-07 by SONE Takesh
9 * 2004-04 moved by LYH From filo to Etherboot
10 * yhlu@tyan.com
11 */
12
13 #include <ipxe/io.h>
14 #include <ipxe/console.h>
15
16 static char key_map[][128] = {
17 {
18 "\0\x1b""1234567890-=\b\t"
19 "qwertyuiop[]\r\0as"
20 "dfghjkl;'`\0\\zxcv"
21 "bnm,./\0*\0 \0\0\0\0\0\0"
22 "\0\0\0\0\0\0\0""789-456+1"
23 "230."
24 },{
25 "\0\x1b""!@#$%^&*()_+\b\t"
26 "QWERTYUIOP{}\r\0AS"
27 "DFGHJKL:\"~\0|ZXCV"
28 "BNM<>?\0\0\0 \0\0\0\0\0\0"
29 "\0\0\0\0\0\0\0""789-456+1"
30 "230."
31 }
32 };
33
34 static int cur_scan;
35 static unsigned int shift_state;
36 #define SHIFT 1
37 #define CONTROL 2
38 #define CAPS 4
39
40 static int get_scancode(void)
41 {
42 int scan;
43
44 if ((inb(0x64) & 1) == 0)
45 return 0;
46 scan = inb(0x60);
47
48 switch (scan) {
49 case 0x2a:
50 case 0x36:
51 shift_state |= SHIFT;
52 break;
53 case 0xaa:
54 case 0xb6:
55 shift_state &= ~SHIFT;
56 break;
57 case 0x1d:
58 shift_state |= CONTROL;
59 break;
60 case 0x9d:
61 shift_state &= ~CONTROL;
62 break;
63 case 0x3a:
64 shift_state ^= CAPS;
65 break;
66 }
67
68 if (scan & 0x80)
69 return 0; /* ignore break code or 0xe0 etc! */
70 return scan;
71 }
72
73 static int kbd_havekey(void)
74 {
75 if (!cur_scan)
76 cur_scan = get_scancode();
77 return cur_scan != 0;
78 }
79
80 static int kbd_ischar(void)
81 {
82 if (!kbd_havekey())
83 return 0;
84 if (!key_map[shift_state & SHIFT][cur_scan]) {
85 cur_scan = 0;
86 return 0;
87 }
88 return 1;
89 }
90
91 static int kbd_getc(void)
92 {
93 int c;
94
95 while (!kbd_ischar())
96 ;
97 c = key_map[shift_state & SHIFT][cur_scan];
98 if (shift_state & (CONTROL | CAPS)) {
99 if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
100 if (shift_state & CONTROL)
101 c &= 0x1f;
102 else if (shift_state & CAPS)
103 c ^= ('A' ^ 'a');
104 }
105 }
106 cur_scan = 0;
107 return c;
108 }
109
110 struct console_driver pc_kbd_console __console_driver = {
111 .getchar = kbd_getc,
112 };