/*
* Copyright (C) 2006 Ondrej Palkovsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/** @defgroup egafb EGA framebuffer
* @brief HelenOS EGA framebuffer.
* @ingroup fbs
* @{
*/
/** @file
*/
#include <stdlib.h>
#include <unistd.h>
#include <align.h>
#include <async.h>
#include <ipc/ipc.h>
#include <errno.h>
#include <stdio.h>
#include <ddi.h>
#include <sysinfo.h>
#include <as.h>
#include <ipc/fb.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/services.h>
#include "ega.h"
#include "../console/screenbuffer.h"
#include "main.h"
#define MAX_SAVED_SCREENS 256
typedef struct saved_screen {
short *data;
} saved_screen;
saved_screen saved_screens[MAX_SAVED_SCREENS];
#define EGA_IO_ADDRESS 0x3d4
#define EGA_IO_SIZE 2
#define NORMAL_COLOR 0x0f
#define INVERTED_COLOR 0xf0
#define EGA_STYLE(fg,bg) ((fg) > (bg) ? NORMAL_COLOR : INVERTED_COLOR)
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
/* Allow only 1 connection */
static int client_connected = 0;
static unsigned int scr_width;
static unsigned int scr_height;
static char *scr_addr;
static unsigned int style = NORMAL_COLOR;
static inline void outb(u16 port, u8 b)
{
asm volatile ("outb %0, %1\n" :: "a" (b), "d" (port));
}
static inline void outw(u16 port, u16 w)
{
asm volatile ("outw %0, %1\n" :: "a" (w), "d" (port));
}
static inline void outl(u16 port, u32 l)
{
asm volatile ("outl %0, %1\n" :: "a" (l), "d" (port));
}
static inline u8 inb(u16 port)
{
u8 val;
asm volatile ("inb %1, %0 \n" : "=a" (val) : "d"(port));
return val;
}
static inline u16 inw(u16 port)
{
u16 val;
asm volatile ("inw %1, %0 \n" : "=a" (val) : "d"(port));
return val;
}
static inline u32 inl(u16 port)
{
u32 val;
asm volatile ("inl %1, %0 \n" : "=a" (val) : "d"(port));
return val;
}
static void clrscr(void)
{
int i;
for (i=0; i < scr_width*scr_height; i++) {
scr_addr[i*2] = ' ';
scr_addr[i*2+1] = style;
}
}
static void cursor_goto(unsigned int row, unsigned int col)
{
int ega_cursor;
ega_cursor=col+scr_width*row;
outb(EGA_IO_ADDRESS , 0xe);
outb(EGA_IO_ADDRESS + 1, (ega_cursor >>8) & 0xff);
outb(EGA_IO_ADDRESS , 0xf);
outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
}
static void cursor_disable(void)
{
u8 stat;
outb(EGA_IO_ADDRESS , 0xa);
stat=inb(EGA_IO_ADDRESS + 1);
outb(EGA_IO_ADDRESS , 0xa);
outb(EGA_IO_ADDRESS +1 ,stat | (1<<5) );
}
static void cursor_enable(void)
{
u8 stat;
outb(EGA_IO_ADDRESS , 0xa);
stat=inb(EGA_IO_ADDRESS + 1);
outb(EGA_IO_ADDRESS , 0xa);
outb(EGA_IO_ADDRESS +1 ,stat & (~(1<<5)) );
}
static void scroll(int rows)
{
int i;
if (rows > 0) {
memcpy (scr_addr
,((char *)scr_addr
) + rows
* scr_width
* 2, scr_width
* scr_height
* 2 - rows
* scr_width
* 2); for (i = 0; i < rows * scr_width ; i ++)
(((short *)scr_addr) + scr_width * scr_height - rows * scr_width) [i] = ((style << 8) + ' ');
} else if (rows < 0) {
memcpy (((char *)scr_addr
) - rows
* scr_width
* 2 ,scr_addr
,scr_width
* scr_height
* 2 + rows
* scr_width
* 2); for (i = 0; i < - rows * scr_width ; i++)
((short *)scr_addr) [i] = ((style << 8 ) + ' ');
}
}
static void printchar(char c, unsigned int row, unsigned int col)
{
scr_addr[(row*scr_width + col)*2] = c;
scr_addr[(row*scr_width + col)*2+1] = style;
cursor_goto(row,col+1);
}
static void draw_text_data(keyfield_t *data)
{
int i;
for (i=0; i < scr_width*scr_height; i++) {
scr_addr[i*2] = data[i].character;
scr_addr[i*2+1] = EGA_STYLE(data[i].style.fg_color, data[i].style.bg_color);
}
}
static int save_screen(void)
{
int i;
short *mem;
for (i=0 ;( i < MAX_SAVED_SCREENS ) && (saved_screens[i].data); i++);
if (i == MAX_SAVED_SCREENS)
return EINVAL;
if (!(saved_screens
[i
].
data=malloc( 2 * scr_width
*scr_height
))) return ENOMEM;
memcpy (saved_screens
[i
].
data ,scr_addr
,2 * scr_width
* scr_height
) ;
return i;
}
static int print_screen(int i)
{
if (saved_screens[i].data)
memcpy (scr_addr
,saved_screens
[i
].
data, 2 * scr_width
* scr_height
); else return EINVAL;
return i;
}
static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
int retval;
ipc_callid_t callid;
ipc_call_t call;
char c;
unsigned int row, col;
int bgcolor,fgcolor;
keyfield_t *interbuf = NULL;
size_t intersize = 0;
int i;
if (client_connected) {
ipc_answer_fast(iid, ELIMIT, 0,0);
return;
}
client_connected = 1;
ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
while (1) {
callid = async_get_call(&call);
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
client_connected = 0;
ipc_answer_fast(callid,0,0,0);
return; /* Exit thread */
case IPC_M_AS_AREA_SEND:
/* We accept one area for data interchange */
intersize = IPC_GET_ARG2(call);
if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {
receive_comm_area(callid,&call,(void **)&interbuf);
continue;
}
retval = EINVAL;
break;
case FB_DRAW_TEXT_DATA:
if (!interbuf) {
retval = EINVAL;
break;
}
draw_text_data(interbuf);
retval = 0;
break;
case FB_GET_CSIZE:
ipc_answer_fast(callid, 0, scr_height, scr_width);
continue;
case FB_CLEAR:
clrscr();
retval = 0;
break;
case FB_PUTCHAR:
c = IPC_GET_ARG1(call);
row = IPC_GET_ARG2(call);
col = IPC_GET_ARG3(call);
if (col >= scr_width || row >= scr_height) {
retval = EINVAL;
break;
}
printchar(c,row,col);
retval = 0;
break;
case FB_CURSOR_GOTO:
row = IPC_GET_ARG1(call);
col = IPC_GET_ARG2(call);
if (row >= scr_height || col >= scr_width) {
retval = EINVAL;
break;
}
cursor_goto(row,col);
retval = 0;
break;
case FB_SCROLL:
i = IPC_GET_ARG1(call);
if (i > scr_height || i < (- (int)scr_height)) {
retval = EINVAL;
break;
}
scroll(i);
retval = 0;
break;
case FB_CURSOR_VISIBILITY:
if(IPC_GET_ARG1(call))
cursor_enable();
else
cursor_disable();
retval = 0;
break;
case FB_SET_STYLE:
fgcolor = IPC_GET_ARG1(call);
bgcolor = IPC_GET_ARG2(call);
style = EGA_STYLE(fgcolor, bgcolor);
break;
case FB_VP_DRAW_PIXMAP:
i = IPC_GET_ARG2(call);
retval = print_screen(i);
break;
case FB_VP2PIXMAP:
retval = save_screen();
break;
case FB_DROP_PIXMAP:
i = IPC_GET_ARG1(call);
if (i >= MAX_SAVED_SCREENS) {
retval = EINVAL;
break;
}
if (saved_screens[i].data) {
free(saved_screens
[i
].
data); saved_screens[i].data = NULL;
}
break;
default:
retval = ENOENT;
}
ipc_answer_fast(callid,retval,0,0);
}
}
int ega_init(void)
{
void *ega_ph_addr;
size_t sz;
ega_ph_addr=(void *)sysinfo_value("fb.address.physical");
scr_width=sysinfo_value("fb.width");
scr_height=sysinfo_value("fb.height");
iospace_enable(task_get_id(),(void *)EGA_IO_ADDRESS,2);
sz = scr_width*scr_height*2;
scr_addr = as_get_mappable_page(sz);
map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
AS_AREA_READ | AS_AREA_WRITE);
async_set_client_connection(ega_client_connection);
return 0;
}
/**
* @}
*/