* Copyright (c) 1996, 1997

/* $NetBSD: pcio.c,v 1.30 2011/06/08 16:04:40 joerg Exp $ */

/*
* Copyright (c) 1996, 1997
* Matthias Drochner. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/

/*
* console I/O
* needs lowlevel routines from conio.S and comio.S
*/

#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include <sys/bootblock.h>

#include "libi386.h"
#include "bootinfo.h"

extern struct x86_boot_params boot_params;

struct btinfo_console btinfo_console;

#ifdef SUPPORT_SERIAL
static int iodev;

#ifdef DIRECT_SERIAL
#include "comio_direct.h"

#define cominit_x() btinfo_console.speed = \
cominit_d(btinfo_console.addr, btinfo_console.speed)
#define computc_x(ch) computc_d(ch, btinfo_console.addr)
#define comgetc_x() comgetc_d(btinfo_console.addr)
#define comstatus_x() comstatus_d(btinfo_console.addr)

#else
#define cominit_x() cominit(iodev - CONSDEV_COM0)
#define computc_x(ch) computc(ch, iodev - CONSDEV_COM0)
#define comgetc_x() comgetc(iodev - CONSDEV_COM0)
#define comstatus_x() comstatus(iodev - CONSDEV_COM0)

#endif /* DIRECT_SERIAL */

static int getcomaddr(int);
#endif /* SUPPORT_SERIAL */

#define POLL_FREQ 10

static void
wait(int us)
{
int prev = biosgetsystime();
int tgt = prev + (20 * us) / 1000000;
int new;

while ((new = biosgetsystime()) < tgt) {
if (new < prev) /* XXX timer wrapped */
break;
prev = new;
}
}

#ifdef SUPPORT_SERIAL
static int
getcomaddr(int idx)
{
short addr;
#ifdef CONSADDR
if (CONSADDR != 0)
return CONSADDR;
#endif
/* read in BIOS data area */
pvbcopy((void *)(0x400 + 2 * idx), &addr, 2);
return addr;
}
#endif

void
clear_pc_screen(void)
{
#ifdef SUPPORT_SERIAL
/* Clear the screen if we are on a glass tty. */
if (iodev == CONSDEV_PC)
conclr();
#endif
}

void
initio(int dev)
{
#ifdef SUPPORT_SERIAL
int i;

#if defined(DIRECT_SERIAL) && defined(CONSPEED)
btinfo_console.speed = CONSPEED;
#else
btinfo_console.speed = 9600;
#endif

switch (dev) {
case CONSDEV_AUTO:
for (i = 0; i < 3; i++) {
iodev = CONSDEV_COM0 + i;
btinfo_console.addr = getcomaddr(i);
if (!btinfo_console.addr)
break;
conputc('0' + i); /* to tell user what happens */
cominit_x();
#ifdef DIRECT_SERIAL
/* check for:
* 1. successful output
* 2. optionally, keypress within 7s
*/
if ( computc_x(':') &&
computc_x('-') &&
computc_x('(')
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
goto ok;
#else /* ! DIRECT_SERIAL */
/*
* serial console must have hardware handshake!
* check:
* 1. character output without error
* 2. status bits for modem ready set
* (status seems only useful after character output)
* 3. optionally, keypress within 7s
*/
if (!(computc_x('@') & 0x80)
&& (comstatus_x() & 0x00b0)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
goto ok;
#endif /* DIRECT_SERIAL */
}
iodev = CONSDEV_PC;
ok:
break;
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
iodev = dev;
btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0);
if (!btinfo_console.addr)
goto nocom;
cominit_x();
break;
case CONSDEV_COM0KBD:
case CONSDEV_COM1KBD:
case CONSDEV_COM2KBD:
case CONSDEV_COM3KBD:
iodev = dev - CONSDEV_COM0KBD + CONSDEV_COM0;
i = iodev - CONSDEV_COM0;
btinfo_console.addr = getcomaddr(i);
if (!btinfo_console.addr)
goto nocom;
conputc('0' + i); /* to tell user what happens */
cominit_x();
#ifdef DIRECT_SERIAL
/* check for:
* 1. successful output
* 2. optionally, keypress within 7s
*/
if ( computc_x(':') &&
computc_x('-') &&
computc_x('(')
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
break;
#else /* ! DIRECT_SERIAL */
/*
* serial console must have hardware handshake!
* check:
* 1. character output without error
* 2. status bits for modem ready set
* (status seems only useful after character output)
* 3. optionally, keypress within 7s
*/
if (!(computc_x('@') & 0x80)
&& (comstatus_x() & 0x00b0)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
break;
#endif /* DIRECT_SERIAL */
default:
nocom:
iodev = CONSDEV_PC;
break;
}
conputc('\015');
conputc('\n');
strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16);

#else /* !SUPPORT_SERIAL */
btinfo_console.devname[0] = 'p';
btinfo_console.devname[1] = 'c';
btinfo_console.devname[2] = 0;
#endif /* SUPPORT_SERIAL */
}

static inline void internal_putchar(int);

static inline void
internal_putchar(int c)
{
#ifdef SUPPORT_SERIAL
switch (iodev) {
case CONSDEV_PC:
#endif
conputc(c);
#ifdef SUPPORT_SERIAL
break;
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
computc_x(c);
break;
}
#endif
}

void
putchar(int c)
{
if (c == '\n')
internal_putchar('\r');
internal_putchar(c);
}

int
getchar(void)
{
int c;
#ifdef SUPPORT_SERIAL
switch (iodev) {
default: /* to make gcc -Wall happy... */
case CONSDEV_PC:
#endif
while (!coniskey())
;
c = congetc();
#ifdef CONSOLE_KEYMAP
{
char *cp = strchr(CONSOLE_KEYMAP, c);
if (cp != 0 && cp[1] != 0)
c = cp[1];
}
#endif
return c;
#ifdef SUPPORT_SERIAL
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
#ifdef DIRECT_SERIAL
c = comgetc_x();
#else
do {
c = comgetc_x();
} while ((c >> 8) == 0xe0); /* catch timeout */
#ifdef COMDEBUG
if (c & 0x8000) {
printf("com input %x, status %x\n",
c, comstatus_x());
}
#endif
c &= 0xff;
#endif /* DIRECT_SERIAL */
return c;
}
#endif /* SUPPORT_SERIAL */
}

int
iskey(int intr)
{
#ifdef SUPPORT_SERIAL
switch (iodev) {
default: /* to make gcc -Wall happy... */
case CONSDEV_PC:
#endif
return (intr && conisshift()) || coniskey();
#ifdef SUPPORT_SERIAL
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
#ifdef DIRECT_SERIAL
return !!comstatus_x();
#else
return !!(comstatus_x() & 0x0100);
#endif
}
#endif /* SUPPORT_SERIAL */
}

char
awaitkey(int timeout, int tell)
{
int i;
char c = 0;

i = timeout * POLL_FREQ;

for (;;) {
if (tell && (i % POLL_FREQ) == 0) {
char numbuf[32];
int len;

len = snprintf(numbuf, sizeof(numbuf), "%d seconds. ",
i/POLL_FREQ);
if (len > 0 && len < sizeof(numbuf)) {
char *p = numbuf;

printf("%s", numbuf);
while (*p)
*p++ = '\b';
printf("%s", numbuf);
}
}
if (iskey(1)) {
/* flush input buffer */
while (iskey(0))
c = getchar();
if (c == 0)
c = -1;
goto out;
}
if (i--)
wait(1000000 / POLL_FREQ);
else
break;
}

out:
if (tell)
printf("0 seconds. \n");

return c;
}

void
wait_sec(int sec)
{

wait(sec * 1000000);
}