File: [local] / funnyos / dev / fcons / fcons.c (download)
Revision 1.2, Tue Oct 16 21:41:36 2007 UTC (16 years, 8 months ago) by init
Branch: MAIN
Changes since 1.1: +33 -34 lines
rework for struct driver; use fcons_handle abstraction
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/*
* $Id: fcons.c,v 1.2 2007/10/16 21:41:36 init Exp $
*/
#include <sys/types.h>
#include <sys/device.h>
#include <dev/fcons/fconsvar.h>
#include <libkern/printf.h>
/*
* funnyOS console.
* 80x25, monochrome.
*/
/* current console device */
struct fcons_dd *curcons;
extern void (*putchar)(char);
int fcons_attach(struct device *, uint32_t loc, uint8_t flags);
void fcons_putchar(void *ddp, char);
char fcons_getchar(void *ddp);
void fcons_dfltputchar(char);
int fcons_devctl(struct device *, uint8_t, void *);
struct driver fcons_dr = {
sizeof(struct fcons_dd),
fcons_attach,
NULL
};
int
fcons_attach(struct device *self, uint32_t loc, uint8_t size)
{
struct fcons_dd *ddp = self->dv_devdata;
ddp->fd_currow = 0;
ddp->fd_curcol = 0;
/* make current console default */
curcons = ddp;
/* override early putchar */
putchar = fcons_dfltputchar;
printf("system console (80x25, monochrome, no video buffer)\n");
return(0);
}
void
fcons_putchar(void *ddp, char ch)
{
struct fcons_dd *fdp = ddp;
struct fcons_handle *fhp = &fdp->fd_fh;
/* if we reach screen width */
if (fdp->fd_curcol == (FCONS_WIDTH - 1)) {
/* CRLF */
fdp->fd_curcol = 0;
fdp->fd_currow++;
/* XXX pass \n to lower level (not all devices work this way) */
fhp->putc(fhp->fh_ownerdd, '\n');
}
/* XXX do something if col == FCONS_HEIGHT; console buffer? */
/* if we reach the bottom of the screen */
if (fdp->fd_currow == FCONS_HEIGHT) {
/* XXX tmp hack; should really follow clrscr */
fdp->fd_currow = 0;
}
fhp->putc(fhp->fh_ownerdd, ch);
}
char
fcons_getchar(void *ddp)
{
/* TODO */
return ' ';
}
void
fcons_dfltputchar(char ch)
{
/*
* Put a character into default (current) console.
*/
fcons_putchar(curcons, ch);
return;
}
#if 0
int
fcons_devctl(struct device *devp, uint8_t ctl, void *data)
{
/*
* Devctl support for fcons device.
*/
switch(ctl) {
case DCFCONS_GETCURROW:
/* return cursor's row */
data = &fcons_dd[devp->dv_minor].currow;
return(0);
case DCFCONS_GETCURCOL:
/* return cursor's column */
data = &fcons_dd[devp->dv_minor].curcol;
return(0);
case DCFCONS_PUTCHAR:
/* put a character to the device */
fcons_putchar(devp, *(char*)data);
return(0);
case DCFCONS_GETCHAR:
/* get a character from the device */
/* TODO */
return(-1);
default:
/* unknown devctl */
return(-1);
}
}
#endif /* not 0 */