diff options
Diffstat (limited to 'os/boot/pc/kbd.c')
| -rw-r--r-- | os/boot/pc/kbd.c | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/os/boot/pc/kbd.c b/os/boot/pc/kbd.c new file mode 100644 index 00000000..a572866f --- /dev/null +++ b/os/boot/pc/kbd.c @@ -0,0 +1,489 @@ +#include "u.h" +#include "lib.h" +#include "mem.h" +#include "dat.h" +#include "fns.h" +#include "io.h" + +enum { + Data= 0x60, /* data port */ + + Status= 0x64, /* status port */ + Inready= 0x01, /* input character ready */ + Outbusy= 0x02, /* output busy */ + Sysflag= 0x04, /* system flag */ + Cmddata= 0x08, /* cmd==0, data==1 */ + Inhibit= 0x10, /* keyboard/mouse inhibited */ + Minready= 0x20, /* mouse character ready */ + Rtimeout= 0x40, /* general timeout */ + Parity= 0x80, + + Cmd= 0x64, /* command port (write only) */ + + Spec= 0x80, + + PF= Spec|0x20, /* num pad function key */ + View= Spec|0x00, /* view (shift window up) */ + KF= Spec|0x40, /* function key */ + Shift= Spec|0x60, + Break= Spec|0x61, + Ctrl= Spec|0x62, + Latin= Spec|0x63, + Caps= Spec|0x64, + Num= Spec|0x65, + No= Spec|0x7F, /* no mapping */ + + Home= KF|13, + Up= KF|14, + Pgup= KF|15, + Print= KF|16, + Left= View, + Right= View, + End= '\r', + Down= View, + Pgdown= View, + Ins= KF|20, + Del= 0x7F, +}; + +uchar kbtab[] = +{ +[0x00] No, 0x1b, '1', '2', '3', '4', '5', '6', +[0x08] '7', '8', '9', '0', '-', '=', '\b', '\t', +[0x10] 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', +[0x18] 'o', 'p', '[', ']', '\n', Ctrl, 'a', 's', +[0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', +[0x28] '\'', '`', Shift, '\\', 'z', 'x', 'c', 'v', +[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, No, +[0x38] Latin, ' ', Caps, KF|1, KF|2, KF|3, KF|4, KF|5, +[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, KF|12, Home, +[0x48] No, No, No, No, No, No, No, No, +[0x50] No, No, No, No, No, No, No, KF|11, +[0x58] KF|12, No, No, No, No, No, No, No, +}; + +uchar kbtabshift[] = +{ +[0x00] No, 0x1b, '!', '@', '#', '$', '%', '^', +[0x08] '&', '*', '(', ')', '_', '+', '\b', '\t', +[0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', +[0x18] 'O', 'P', '{', '}', '\n', Ctrl, 'A', 'S', +[0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', +[0x28] '"', '~', Shift, '|', 'Z', 'X', 'C', 'V', +[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, No, +[0x38] Latin, ' ', Caps, KF|1, KF|2, KF|3, KF|4, KF|5, +[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, KF|12, Home, +[0x48] No, No, No, No, No, No, No, No, +[0x50] No, No, No, No, No, No, No, KF|11, +[0x58] KF|12, No, No, No, No, No, No, No, +}; + +uchar kbtabesc1[] = +{ +[0x00] No, No, No, No, No, No, No, No, +[0x08] No, No, No, No, No, No, No, No, +[0x10] No, No, No, No, No, No, No, No, +[0x18] No, No, No, No, No, Ctrl, No, No, +[0x20] No, No, No, No, No, No, No, No, +[0x28] No, No, No, No, No, No, No, No, +[0x30] No, No, No, No, No, No, No, Print, +[0x38] Latin, No, No, No, No, No, No, No, +[0x40] No, No, No, No, No, No, Break, Home, +[0x48] Up, Pgup, No, Down, No, Right, No, End, +[0x50] Left, Pgdown, Ins, Del, No, No, No, No, +[0x58] No, No, No, No, No, No, No, No, +}; + +struct latin +{ + uchar l; + char c[2]; +}latintab[] = { + L'¡', "!!", /* spanish initial ! */ + L'¢', "c|", /* cent */ + L'¢', "c$", /* cent */ + L'£', "l$", /* pound sterling */ + L'¤', "g$", /* general currency */ + L'¥', "y$", /* yen */ + L'¥', "j$", /* yen */ + L'¦', "||", /* broken vertical bar */ + L'§', "SS", /* section symbol */ + L'¨', "\"\"", /* dieresis */ + L'©', "cr", /* copyright */ + L'©', "cO", /* copyright */ + L'ª', "sa", /* super a, feminine ordinal */ + L'«', "<<", /* left angle quotation */ + L'¬', "no", /* not sign, hooked overbar */ + L'', "--", /* soft hyphen */ + L'®', "rg", /* registered trademark */ + L'¯', "__", /* macron */ + L'°', "s0", /* degree (sup o) */ + L'±', "+-", /* plus-minus */ + L'²', "s2", /* sup 2 */ + L'³', "s3", /* sup 3 */ + L'´', "''", /* grave accent */ + L'µ', "mu", /* mu */ + L'¶', "pg", /* paragraph (pilcrow) */ + L'·', "..", /* centered . */ + L'¸', ",,", /* cedilla */ + L'¹', "s1", /* sup 1 */ + L'º', "so", /* sup o */ + L'»', ">>", /* right angle quotation */ + L'¼', "14", /* 1/4 */ + L'½', "12", /* 1/2 */ + L'¾', "34", /* 3/4 */ + L'¿', "??", /* spanish initial ? */ + L'À', "A`", /* A grave */ + L'Á', "A'", /* A acute */ + L'Â', "A^", /* A circumflex */ + L'Ã', "A~", /* A tilde */ + L'Ä', "A\"", /* A dieresis */ + L'Ä', "A:", /* A dieresis */ + L'Å', "Ao", /* A circle */ + L'Å', "AO", /* A circle */ + L'Æ', "Ae", /* AE ligature */ + L'Æ', "AE", /* AE ligature */ + L'Ç', "C,", /* C cedilla */ + L'È', "E`", /* E grave */ + L'É', "E'", /* E acute */ + L'Ê', "E^", /* E circumflex */ + L'Ë', "E\"", /* E dieresis */ + L'Ë', "E:", /* E dieresis */ + L'Ì', "I`", /* I grave */ + L'Í', "I'", /* I acute */ + L'Î', "I^", /* I circumflex */ + L'Ï', "I\"", /* I dieresis */ + L'Ï', "I:", /* I dieresis */ + L'Ð', "D-", /* Eth */ + L'Ñ', "N~", /* N tilde */ + L'Ò', "O`", /* O grave */ + L'Ó', "O'", /* O acute */ + L'Ô', "O^", /* O circumflex */ + L'Õ', "O~", /* O tilde */ + L'Ö', "O\"", /* O dieresis */ + L'Ö', "O:", /* O dieresis */ + L'Ö', "OE", /* O dieresis */ + L'Ö', "Oe", /* O dieresis */ + L'×', "xx", /* times sign */ + L'Ø', "O/", /* O slash */ + L'Ù', "U`", /* U grave */ + L'Ú', "U'", /* U acute */ + L'Û', "U^", /* U circumflex */ + L'Ü', "U\"", /* U dieresis */ + L'Ü', "U:", /* U dieresis */ + L'Ü', "UE", /* U dieresis */ + L'Ü', "Ue", /* U dieresis */ + L'Ý', "Y'", /* Y acute */ + L'Þ', "P|", /* Thorn */ + L'Þ', "Th", /* Thorn */ + L'Þ', "TH", /* Thorn */ + L'ß', "ss", /* sharp s */ + L'à', "a`", /* a grave */ + L'á', "a'", /* a acute */ + L'â', "a^", /* a circumflex */ + L'ã', "a~", /* a tilde */ + L'ä', "a\"", /* a dieresis */ + L'ä', "a:", /* a dieresis */ + L'å', "ao", /* a circle */ + L'æ', "ae", /* ae ligature */ + L'ç', "c,", /* c cedilla */ + L'è', "e`", /* e grave */ + L'é', "e'", /* e acute */ + L'ê', "e^", /* e circumflex */ + L'ë', "e\"", /* e dieresis */ + L'ë', "e:", /* e dieresis */ + L'ì', "i`", /* i grave */ + L'í', "i'", /* i acute */ + L'î', "i^", /* i circumflex */ + L'ï', "i\"", /* i dieresis */ + L'ï', "i:", /* i dieresis */ + L'ð', "d-", /* eth */ + L'ñ', "n~", /* n tilde */ + L'ò', "o`", /* o grave */ + L'ó', "o'", /* o acute */ + L'ô', "o^", /* o circumflex */ + L'õ', "o~", /* o tilde */ + L'ö', "o\"", /* o dieresis */ + L'ö', "o:", /* o dieresis */ + L'ö', "oe", /* o dieresis */ + L'÷', "-:", /* divide sign */ + L'ø', "o/", /* o slash */ + L'ù', "u`", /* u grave */ + L'ú', "u'", /* u acute */ + L'û', "u^", /* u circumflex */ + L'ü', "u\"", /* u dieresis */ + L'ü', "u:", /* u dieresis */ + L'ü', "ue", /* u dieresis */ + L'ý', "y'", /* y acute */ + L'þ', "th", /* thorn */ + L'þ', "p|", /* thorn */ + L'ÿ', "y\"", /* y dieresis */ + L'ÿ', "y:", /* y dieresis */ + 0, 0, +}; + +enum +{ + /* controller command byte */ + Cscs1= (1<<6), /* scan code set 1 */ + Cmousedis= (1<<5), /* mouse disable */ + Ckbddis= (1<<4), /* kbd disable */ + Csf= (1<<2), /* system flag */ + Cmouseint= (1<<1), /* mouse interrupt enable */ + Ckbdint= (1<<0), /* kbd interrupt enable */ +}; + +static uchar ccc; + +int +latin1(int k1, int k2) +{ + struct latin *l; + + for(l=latintab; l->l; l++) + if(k1==l->c[0] && k2==l->c[1]) + return l->l; + return 0; +} + +/* + * wait for output no longer busy + */ +static int +outready(void) +{ + int tries; + + for(tries = 0; (inb(Status) & Outbusy); tries++){ + if(tries > 500) + return -1; + delay(2); + } + return 0; +} + +/* + * wait for input + */ +static int +inready(void) +{ + int tries; + + for(tries = 0; !(inb(Status) & Inready); tries++){ + if(tries > 500) + return -1; + delay(2); + } + return 0; +} + +/* + * ask 8042 to enable the use of address bit 20 + */ +void +i8042a20(void) +{ + outready(); + outb(Cmd, 0xD1); + outready(); + outb(Data, 0xDF); + outready(); +} + +/* + * ask 8042 to reset the machine + */ +void +i8042reset(void) +{ + int i, x; +#ifdef notdef + ushort *s = (ushort*)(KZERO|0x472); + + *s = 0x1234; /* BIOS warm-boot flag */ +#endif /* notdef */ + + outready(); + outb(Cmd, 0xFE); /* pulse reset line (means resend on AT&T machines) */ + outready(); + + /* + * Pulse it by hand (old somewhat reliable) + */ + x = 0xDF; + for(i = 0; i < 5; i++){ + x ^= 1; + outready(); + outb(Cmd, 0xD1); + outready(); + outb(Data, x); /* toggle reset */ + delay(100); + } +} + +/* + * keyboard interrupt + */ +static void +i8042intr(Ureg*, void*) +{ + int s, c; + static int esc1, esc2; + static int alt, caps, ctl, num, shift; + static int lstate, k1, k2; + int keyup; + + /* + * get status + */ + s = inb(Status); + if(!(s&Inready)) + return; + + /* + * get the character + */ + c = inb(Data); + + /* + * if it's the aux port... + */ + if(s & Minready) + return; + + /* + * e0's is the first of a 2 character sequence + */ + if(c == 0xe0){ + esc1 = 1; + return; + } else if(c == 0xe1){ + esc2 = 2; + return; + } + + keyup = c&0x80; + c &= 0x7f; + if(c > sizeof kbtab){ + c |= keyup; + if(c != 0xFF) /* these come fairly often: CAPSLOCK U Y */ + print("unknown key %ux\n", c); + return; + } + + if(esc1){ + c = kbtabesc1[c]; + esc1 = 0; + } else if(esc2){ + esc2--; + return; + } else if(shift) + c = kbtabshift[c]; + else + c = kbtab[c]; + + if(caps && c<='z' && c>='a') + c += 'A' - 'a'; + + /* + * keyup only important for shifts + */ + if(keyup){ + switch(c){ + case Latin: + alt = 0; + break; + case Shift: + shift = 0; + break; + case Ctrl: + ctl = 0; + break; + } + return; + } + + /* + * normal character + */ + if(!(c & Spec)){ + if(ctl){ + if(alt && c == Del) + warp86("\nCtrl-Alt-Del\n", 0); + c &= 0x1f; + } + switch(lstate){ + case 1: + k1 = c; + lstate = 2; + return; + case 2: + k2 = c; + lstate = 0; + c = latin1(k1, k2); + if(c == 0){ + kbdchar(k1); + c = k2; + } + /* fall through */ + default: + break; + } + } else { + switch(c){ + case Caps: + caps ^= 1; + return; + case Num: + num ^= 1; + return; + case Shift: + shift = 1; + return; + case Latin: + alt = 1; + lstate = 1; + return; + case Ctrl: + ctl = 1; + return; + } + } + kbdchar(c); +} + +static char *initfailed = "kbd init failed\n"; + +void +i8042init(void) +{ + int c; + + /* wait for a quiescent controller */ + while((c = inb(Status)) & (Outbusy | Inready)) + if(c & Inready) + inb(Data); + + /* get current controller command byte */ + outb(Cmd, 0x20); + if(inready() < 0){ + print("kbdinit: can't read ccc\n"); + ccc = 0; + } else + ccc = inb(Data); + + /* enable kbd xfers and interrupts */ + ccc &= ~Ckbddis; + ccc |= Csf | Ckbdint | Cscs1; + if(outready() < 0) + print(initfailed); + outb(Cmd, 0x60); + if(outready() < 0) + print(initfailed); + outb(Data, ccc); + if(outready() < 0) + print(initfailed); + + setvec(VectorKBD, i8042intr, 0); +} |