Annotation of sys/arch/i386/stand/libsa/bioscons.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: bioscons.c,v 1.29 2007/04/27 10:08:34 tom Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1997-1999 Michael Shalayeff
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 19: * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
! 20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 22: * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
! 25: * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
! 26: * THE POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: #include <sys/types.h>
! 30: #include <machine/biosvar.h>
! 31: #include <machine/pio.h>
! 32: #include <dev/isa/isareg.h>
! 33: #include <dev/ic/mc146818reg.h>
! 34: #include <dev/ic/comreg.h>
! 35: #include <dev/ic/ns16450reg.h>
! 36: /* #include <i386/isa/nvram.h> */
! 37: #include <dev/cons.h>
! 38: #include <lib/libsa/stand.h>
! 39: #include "debug.h"
! 40: #include "biosdev.h"
! 41:
! 42: /* XXX cannot trust NVRAM on this. Maybe later we make a real probe. */
! 43: #if 0
! 44: #define PRESENT_MASK (NVRAM_EQUIPMENT_KBD|NVRAM_EQUIPMENT_DISPLAY)
! 45: #else
! 46: #define PRESENT_MASK 0
! 47: #endif
! 48:
! 49: void
! 50: pc_probe(struct consdev *cn)
! 51: {
! 52: cn->cn_pri = CN_INTERNAL;
! 53: cn->cn_dev = makedev(12, 0);
! 54: printf(" pc%d", minor(cn->cn_dev));
! 55:
! 56: #if 0
! 57: outb(IO_RTC, NVRAM_EQUIPMENT);
! 58: if ((inb(IO_RTC+1) & PRESENT_MASK) == PRESENT_MASK) {
! 59: cn->cn_pri = CN_INTERNAL;
! 60: /* XXX from i386/conf.c */
! 61: cn->cn_dev = makedev(12, 0);
! 62: printf(" pc%d", minor(cn->cn_dev));
! 63: }
! 64: #endif
! 65: }
! 66:
! 67: void
! 68: pc_init(struct consdev *cn)
! 69: {
! 70: }
! 71:
! 72: int
! 73: pc_getc(dev_t dev)
! 74: {
! 75: register int rv;
! 76:
! 77: if (dev & 0x80) {
! 78: __asm __volatile(DOINT(0x16) "; setnz %b0" : "=a" (rv) :
! 79: "0" (0x100) : "%ecx", "%edx", "cc" );
! 80: return (rv & 0xff);
! 81: }
! 82:
! 83: /*
! 84: * Wait for a character to actually become available. Appears to
! 85: * be necessary on (at least) the Intel Mac Mini.
! 86: */
! 87: do {
! 88: __asm __volatile(DOINT(0x16) "; setnz %b0" : "=a" (rv) :
! 89: "0" (0x100) : "%ecx", "%edx", "cc" );
! 90: } while ((rv & 0xff) == 0);
! 91:
! 92: __asm __volatile(DOINT(0x16) : "=a" (rv) : "0" (0x000) :
! 93: "%ecx", "%edx", "cc" );
! 94:
! 95: return (rv & 0xff);
! 96: }
! 97:
! 98: int
! 99: pc_getshifts(dev_t dev)
! 100: {
! 101: register int rv;
! 102:
! 103: __asm __volatile(DOINT(0x16) : "=a" (rv) : "0" (0x200) :
! 104: "%ecx", "%edx", "cc" );
! 105:
! 106: return (rv & 0xff);
! 107: }
! 108:
! 109: void
! 110: pc_putc(dev_t dev, int c)
! 111: {
! 112: __asm __volatile(DOINT(0x10) : : "a" (c | 0xe00), "b" (1) :
! 113: "%ecx", "%edx", "cc" );
! 114: }
! 115:
! 116: const int comports[4] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
! 117:
! 118: void
! 119: com_probe(struct consdev *cn)
! 120: {
! 121: register int i, n;
! 122:
! 123: /* get equip. (9-11 # of coms) */
! 124: __asm __volatile(DOINT(0x11) : "=a" (n) : : "%ecx", "%edx", "cc");
! 125: n >>= 9;
! 126: n &= 7;
! 127: for (i = 0; i < n; i++)
! 128: printf(" com%d", i);
! 129: if (n) {
! 130: cn->cn_pri = CN_NORMAL;
! 131: /* XXX from i386/conf.c */
! 132: cn->cn_dev = makedev(8, 0);
! 133: }
! 134: }
! 135:
! 136: void
! 137: com_init(struct consdev *cn)
! 138: {
! 139: register int unit = minor(cn->cn_dev);
! 140:
! 141: /* let bios do necessary init first, 9600-N-1 */
! 142: __asm __volatile(DOINT(0x14) : : "a" (0xe3), "d" (unit) :
! 143: "%ecx", "cc" );
! 144: }
! 145:
! 146: int
! 147: com_getc(dev_t dev)
! 148: {
! 149: register int rv;
! 150:
! 151: if (dev & 0x80) {
! 152: __asm __volatile(DOINT(0x14) : "=a" (rv) :
! 153: "0" (0x300), "d" (minor(dev&0x7f)) : "%ecx", "cc" );
! 154: return ((rv & 0x100) == 0x100);
! 155: }
! 156:
! 157: do
! 158: __asm __volatile(DOINT(0x14) : "=a" (rv) :
! 159: "0" (0x200), "d" (minor(dev)) : "%ecx", "cc" );
! 160: while (rv & 0x8000);
! 161:
! 162: return (rv & 0xff);
! 163: }
! 164:
! 165: /* call with sp == 0 to query the current speed */
! 166: int com_speed = 9600; /* default speed is 9600 baud */
! 167: int
! 168: comspeed(dev_t dev, int sp)
! 169: {
! 170: int i, newsp;
! 171: int err;
! 172:
! 173: if (sp <= 0)
! 174: return com_speed;
! 175: /* valid baud rate? */
! 176: if (115200 < sp || sp < 75)
! 177: return -1;
! 178:
! 179: /*
! 180: * Accepted speeds:
! 181: * 75 150 300 600 1200 2400 4800 9600 19200 38400 76800 and
! 182: * 14400 28800 57600 115200
! 183: */
! 184: for (i = sp; i != 75 && i != 14400; i >>= 1)
! 185: if (i & 1)
! 186: return -1;
! 187:
! 188: /* ripped screaming from dev/ic/com.c */
! 189: #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */
! 190: newsp = divrnd((COM_FREQ / 16), sp);
! 191: if (newsp <= 0)
! 192: return -1;
! 193: err = divrnd((COM_FREQ / 16) * 1000, sp * newsp) - 1000;
! 194: if (err < 0)
! 195: err = -err;
! 196: if (err > COM_TOLERANCE)
! 197: return -1;
! 198: #undef divrnd
! 199:
! 200: if (cn_tab && cn_tab->cn_dev == dev && com_speed != sp) {
! 201: printf("com%d: changing speed to %d baud in 5 seconds, "
! 202: "change your terminal to match!\n\a",
! 203: minor(dev), sp);
! 204: sleep(5);
! 205: }
! 206:
! 207: outb(comports[minor(dev)] + com_cfcr, LCR_DLAB);
! 208: outb(comports[minor(dev)] + com_dlbl, newsp);
! 209: outb(comports[minor(dev)] + com_dlbh, newsp>>8);
! 210: outb(comports[minor(dev)] + com_cfcr, LCR_8BITS);
! 211: printf("\ncom%d: %d baud\n", minor(dev), sp);
! 212:
! 213: newsp = com_speed;
! 214: com_speed = sp;
! 215: return newsp;
! 216: }
! 217:
! 218: void
! 219: com_putc(dev_t dev, int c)
! 220: {
! 221: register int rv;
! 222:
! 223: dev = minor(dev) & 0x7f;
! 224:
! 225: /* check online (DSR) */
! 226: __asm __volatile(DOINT(0x14) : "=a" (rv) :
! 227: "0" (0x300), "d" (dev) : "%ecx", "cc" );
! 228: if ( (rv & 0x20) == 0)
! 229: return;
! 230:
! 231: /* send character */
! 232: __asm __volatile(DOINT(0x14) : "=a" (rv) :
! 233: "0" (c | 0x100), "d" (dev) : "%ecx", "cc" );
! 234: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to bioscons.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / i386 / stand / libsa