/*
* Copyright (C) 2006 Josef Cejka
* 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.
*/
#include <kbd.h>
#include <fb.h>
#include <ipc/ipc.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <errno.h>
#include <key_buffer.h>
#include <console.h>
#include <unistd.h>
#include <async.h>
#include <libadt/fifo.h>
#include <screenbuffer.h>
#include <sys/mman.h>
#include "gcons.h"
#define MAX_KEYREQUESTS_BUFFERED 32
#define NAME "CONSOLE"
/** Index of currently used virtual console.
*/
int active_console = 0;
/** Information about framebuffer
*/
struct {
int phone; /**< Framebuffer phone */
ipcarg_t rows; /**< Framebuffer rows */
ipcarg_t cols; /**< Framebuffer columns */
} fb_info;
typedef struct {
keybuffer_t keybuffer; /**< Buffer for incoming keys. */
FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED); /**< Buffer for unsatisfied request for keys. */
int keyrequest_counter; /**< Number of requests in buffer. */
int client_phone; /**< Phone to connected client. */
int used; /**< 1 if this virtual console is connected to some client.*/
screenbuffer_t screenbuffer; /**< Screenbuffer for saving screen contents and related settings. */
} connection_t;
static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual consoles */
static keyfield_t *interbuffer = NULL; /**< Pointer to memory shared with framebufer used for faster virt. console switching */
static int kernel_pixmap = -1; /**< Number of fb pixmap, where kernel console is stored */
/** Find unused virtual console.
*
*/
static int find_free_connection()
{
int i = 0;
while (i < CONSOLE_COUNT) {
if (connections[i].used == 0)
return i;
++i;
}
return CONSOLE_COUNT;
}
/** Find index of virtual console used by client with given phone.
*
*/
static int find_connection(int client_phone)
{
int i = 0;
while (i < CONSOLE_COUNT) {
if (connections[i].client_phone == client_phone)
return i;
++i;
}
return CONSOLE_COUNT;
}
static void clrscr(void)
{
nsend_call(fb_info.phone, FB_CLEAR, 0);
}
static void curs_visibility(int v)
{
send_call(fb_info.phone, FB_CURSOR_VISIBILITY, v);
}
static void curs_goto(int row, int col)
{
nsend_call_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
}
static void set_style(style_t *style)
{
nsend_call_2(fb_info.phone, FB_SET_STYLE, style->fg_color, style->bg_color);
}
static void set_style_col(int fgcolor, int bgcolor)
{
nsend_call_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
}
static void prtchr(char c, int row, int col)
{
nsend_call_3(fb_info.phone, FB_PUTCHAR, c, row, col);
}
/** Check key and process special keys.
*
* */
static void write_char(int console, char key)
{
screenbuffer_t *scr = &(connections[console].screenbuffer);
switch (key) {
case '\n':
scr->position_y += 1;
scr->position_x = 0;
break;
case '\r':
break;
case '\t':
scr->position_x += 8;
scr->position_x -= scr->position_x % 8;
break;
case '\b':
if (scr->position_x == 0)
break;
scr->position_x--;
if (console == active_console)
prtchr(' ', scr->position_y, scr->position_x);
screenbuffer_putchar(scr, ' ');
break;
default:
if (console == active_console)
prtchr(key, scr->position_y, scr->position_x);
screenbuffer_putchar(scr, key);
scr->position_x++;
}
scr->position_y += (scr->position_x >= scr->size_x);
if (scr->position_y >= scr->size_y) {
scr->position_y = scr->size_y - 1;
screenbuffer_clear_line(scr, scr->top_line++);
if (console == active_console)
nsend_call(fb_info.phone, FB_SCROLL, 1);
}
scr->position_x = scr->position_x % scr->size_x;
if (console == active_console)
curs_goto(scr->position_y, scr->position_x);
}
/** Save current screen to pixmap, draw old pixmap
*
* @param oldpixmap Old pixmap
* @return ID of pixmap of current screen
*/
static int switch_screens(int oldpixmap)
{
int newpmap;
/* Save screen */
newpmap = sync_send(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
if (newpmap < 0)
return -1;
if (oldpixmap != -1) {
/* Show old screen */
nsend_call_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
/* Drop old pixmap */
nsend_call(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
}
return newpmap;
}
/** Switch to new console */
static void change_console(int newcons)
{
connection_t *conn;
static int console_pixmap = -1;
int i, j;
char c;
if (newcons == active_console)
return;
if (newcons == KERNEL_CONSOLE) {
if (active_console == KERNEL_CONSOLE)
return;
active_console = KERNEL_CONSOLE;
curs_visibility(0);
if (kernel_pixmap == -1) {
/* store/restore unsupported */
set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
clrscr();
} else {
gcons_in_kernel();
console_pixmap = switch_screens(kernel_pixmap);
kernel_pixmap = -1;
}
__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
return;
}
if (console_pixmap != -1) {
kernel_pixmap = switch_screens(console_pixmap);
console_pixmap = -1;
}
active_console = newcons;
gcons_change_console(newcons);
conn = &connections[active_console];
set_style(&conn->screenbuffer.style);
curs_goto(conn->screenbuffer.position_y, conn->screenbuffer.position_x);
if (interbuffer) {
for (i = 0; i < conn->screenbuffer.size_x; i++)
for (j = 0; j < conn->screenbuffer.size_y; j++)
interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
/* This call can preempt, but we are already at the end */
sync_send_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);
} else {
curs_visibility(0);
clrscr();
for (i = 0; i < conn->screenbuffer.size_x; i++)
for (j = 0; j < conn->screenbuffer.size_y; j++) {
c = get_field_at(&(conn->screenbuffer),i, j)->character;
if (c && c != ' ')
prtchr(c, j, i);
}
curs_visibility(1);
}
}
/** Handler for keyboard */
static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
{
ipc_callid_t callid;
ipc_call_t call;
int retval;
int c;
connection_t *conn;
/* Ignore parameters, the connection is alread opened */
while (1) {
callid = async_get_call(&call);
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
ipc_answer_fast(callid,0,0,0);
/* TODO: Handle hangup */
return;
case KBD_PUSHCHAR:
/* got key from keyboard driver */
retval = 0;
c = IPC_GET_ARG1(call);
/* switch to another virtual console */
conn = &connections[active_console];
// if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
if (c == 0x112)
change_console(KERNEL_CONSOLE);
else
change_console(c - 0x101);
break;
}
/* if client is awaiting key, send it */
if (conn->keyrequest_counter > 0) {
conn->keyrequest_counter--;
ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
break;
}
/*FIXME: else store key to its buffer */
keybuffer_push(&conn->keybuffer, c);
break;
default:
retval = ENOENT;
}
ipc_answer_fast(callid, retval, 0, 0);
}
}
/** Default thread for new connections */
static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
ipc_callid_t callid;
ipc_call_t call;
int consnum;
ipcarg_t arg1, arg2;
if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
ipc_answer_fast(iid,ELIMIT,0,0);
return;
}
gcons_notify_connect(consnum);
connections[consnum].used = 1;
connections[consnum].client_phone = IPC_GET_ARG3(call);
screenbuffer_clear(&(connections[consnum].screenbuffer));
/* Accept the connection */
ipc_answer_fast(iid,0,0,0);
while (1) {
callid = async_get_call(&call);
arg1 = arg2 = 0;
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
/* TODO */
ipc_answer_fast(callid, 0,0,0);
return;
case CONSOLE_PUTCHAR:
write_char(consnum, IPC_GET_ARG1(call));
gcons_notify_char(consnum);
break;
case CONSOLE_CLEAR:
/* Send message to fb */
if (consnum == active_console) {
send_call(fb_info.phone, FB_CLEAR, 0);
}
screenbuffer_clear(&(connections[consnum].screenbuffer));
break;
case CONSOLE_GOTO:
screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG2(call), IPC_GET_ARG1(call));
curs_goto(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
break;
case CONSOLE_GETSIZE:
arg1 = fb_info.rows;
arg2 = fb_info.cols;
break;
case CONSOLE_FLUSH:
sync_send_2(fb_info.phone, FB_FLUSH, 0, 0, NULL, NULL);
break;
case CONSOLE_SET_STYLE:
arg1 = IPC_GET_ARG1(call);
arg2 = IPC_GET_ARG2(call);
screenbuffer_set_style(&(connections[consnum].screenbuffer),arg1, arg2);
if (consnum == active_console)
set_style_col(arg1, arg2);
break;
case CONSOLE_GETCHAR:
if (keybuffer_empty(&(connections[consnum].keybuffer))) {
/* buffer is empty -> store request */
if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {
fifo_push(connections[consnum].keyrequests, callid);
connections[consnum].keyrequest_counter++;
} else {
/* no key available and too many requests => fail */
ipc_answer_fast(callid, ELIMIT, 0, 0);
}
continue;
};
keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
break;
}
ipc_answer_fast(callid, 0, arg1, arg2);
}
}
int main(int argc, char *argv[])
{
ipcarg_t phonehash;
int kbd_phone, fb_phone;
ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
int i;
async_set_client_connection(client_connection);
/* Connect to keyboard driver */
while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
usleep(10000);
};
if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
return -1;
};
/* Connect to framebuffer driver */
while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
usleep(10000);
}
/* Save old kernel screen */
kernel_pixmap = switch_screens(-1);
/* Initialize gcons */
gcons_init(fb_info.phone);
/* Synchronize, the gcons can have something in queue */
sync_send_2(fb_info.phone, FB_GET_CSIZE, 0, 0, NULL, NULL);
ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
clrscr();
/* Init virtual consoles */
for (i = 0; i < CONSOLE_COUNT; i++) {
connections[i].used = 0;
keybuffer_init(&(connections[i].keybuffer));
connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
connections[i].keyrequest_counter = 0;
if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
/*FIXME: handle error */
return -1;
}
}
if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
if (ipc_call_sync_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
interbuffer = NULL;
}
}
async_new_connection(phonehash, 0, NULL, keyboard_events);
sync_send_2(fb_info.phone, FB_CURSOR_GOTO, 0, 0, NULL, NULL);
nsend_call(fb_info.phone, FB_CURSOR_VISIBILITY, 1);
/* Register at NS */
if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
return -1;
};
async_manager();
return 0;
}