/*
* This file contains the termios TTY driver for the i386
* vga.
*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <libchip/serial.h>
#include <rtems/vgacons.h>
#include <rtems/keyboard.h>
#include <libchip/sersupp.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <crt.h>
#define VGACONS_STATIC static
static int isr_is_on(const rtems_irq_connect_data *irq)
{
return BSP_irq_enabled_at_i8259s(irq->name);
}
static rtems_irq_connect_data keyboard_isr_data = {
BSP_KEYBOARD,
keyboard_interrupt,
0,
NULL,
NULL,
isr_is_on
};
/*
* vgacons_init
*
* This function initializes the VGA console to a quiecsent state.
*/
VGACONS_STATIC void vgacons_init(int minor)
{
/*
* Note: We do not initialize the KBD interface here since
* it was initialized regardless of whether the
* vga is available or not. Therefore it is initialized
* in bsp_start.
*/
}
/*
* vgacons_open
*
* This function opens a port for communication.
*
* Default state is 9600 baud, 8 bits, No parity, and 1 stop bit.
*/
VGACONS_STATIC int vgacons_open(
int major,
int minor,
void *arg
)
{
return RTEMS_SUCCESSFUL;
}
/*
* vgacons_close
*
* This function shuts down the requested port.
*/
VGACONS_STATIC int vgacons_close(
int major,
int minor,
void *arg
)
{
return(RTEMS_SUCCESSFUL);
}
/*
* vgacons_write_polled
*
* This routine polls out the requested character.
*/
VGACONS_STATIC void vgacons_write_polled(
int minor,
char c
)
{
_IBMPC_outch( c );
if( c == '\n')
_IBMPC_outch( '\r' ); /* LF = LF + CR */
}
/*
* vgacons_write_support_polled
*
* Console Termios output entry point when using polled output.
*
*/
VGACONS_STATIC ssize_t vgacons_write_support_polled(
int minor,
const char *buf,
size_t len
)
{
int nwrite = 0;
/*
* poll each byte in the string out of the port.
*/
while (nwrite < len) {
vgacons_write_polled(minor, *buf++);
nwrite++;
}
/*
* return the number of bytes written.
*/
return nwrite;
}
/*
* vgacons_inbyte_nonblocking_polled
*
* Console Termios polling input entry point.
*/
VGACONS_STATIC int vgacons_inbyte_nonblocking_polled(
int minor
)
{
if( rtems_kbpoll() ) {
int c = getch();
return c;
}
return -1;
}
/*
* vgacons_set_attributes
*
* This function sets the UART channel to reflect the requested termios
* port settings.
*/
VGACONS_STATIC int vgacons_set_attributes(
int minor,
const struct termios *t
)
{
return 0;
}
bool vgacons_probe(
int minor
)
{
int status;
static bool firstTime = true;
if ((*(unsigned char*) NB_MAX_ROW_ADDR == 0) &&
(*(unsigned short*)NB_MAX_COL_ADDR == 0)) {
return false;
}
/*
* If there is a video card, let's assume there is also a keyboard.
* The means that we need the ISR installed in case someone wants to
* use the Keyboard or PS2 Mouse. With Microwindows, the console
* can be COM1 and you can still use the mouse/VGA for graphics.
*/
if ( firstTime ) {
status = BSP_install_rtems_irq_handler(&keyboard_isr_data);
if (!status) {
printk("Error installing keyboard interrupt handler!\n");
rtems_fatal_error_occurred(status);
}
}
firstTime = false;
return true;
}
console_fns vgacons_fns =
{
libchip_serial_default_probe, /* deviceProbe */
vgacons_open, /* deviceFirstOpen */
vgacons_close, /* deviceLastClose */
vgacons_inbyte_nonblocking_polled, /* deviceRead */
vgacons_write_support_polled, /* deviceWrite */
vgacons_init, /* deviceInitialize */
vgacons_write_polled, /* deviceWritePolled */
vgacons_set_attributes, /* deviceSetAttributes */
FALSE, /* deviceOutputUsesInterrupts */
};
