/**
* @file
*
* @ingroup Console
*
* @brief pc386 console select
*
* This file contains a routine to select the console based upon a number
* of criteria.
*/
/*
* COPYRIGHT (c) 2011-2012, 2016.
* 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.org/license/LICENSE.
*/
#include <limits.h>
#include <stdlib.h>
#include <termios.h>
#include <bsp.h>
#include <libchip/serial.h>
#include <rtems/libio.h>
#include <rtems/console.h>
#include <rtems/termiostypes.h>
#include <bsp/bspimpl.h>
#include "../../shared/dev/serial/legacy-console.h"
#ifdef RTEMS_RUNTIME_CONSOLE_SELECT
#include <crt.h>
#endif
/*
* Method to return true if the device associated with the
* minor number probs available.
*/
static bool bsp_Is_Available( rtems_device_minor_number minor )
{
console_tbl *cptr = Console_Port_Tbl[minor];
/*
* First perform the configuration dependent probe, then the
* device dependent probe
*/
if ((!cptr->deviceProbe || cptr->deviceProbe(minor)) &&
cptr->pDeviceFns->deviceProbe(minor)) {
return true;
}
return false;
}
/*
* Method to return the first available device.
*/
static rtems_device_minor_number bsp_First_Available_Device( void )
{
rtems_device_minor_number minor;
for (minor=0; minor < Console_Port_Count ; minor++) {
console_tbl *cptr = Console_Port_Tbl[minor];
/*
* First perform the configuration dependent probe, then the
* device dependent probe
*/
if ((!cptr->deviceProbe || cptr->deviceProbe(minor)) &&
cptr->pDeviceFns->deviceProbe(minor)) {
return minor;
}
}
/*
* Error No devices were found. We will want to bail here.
*/
rtems_fatal_error_occurred(RTEMS_IO_ERROR);
}
static bool parse_printk_or_console(
const char *param,
rtems_device_minor_number *minor_out
)
{
static const char *opt;
const char *option;
const char *comma;
size_t length;
size_t index;
rtems_device_minor_number minor;
console_tbl *conscfg;
/*
* Check the command line for the type of mode the console is.
*/
opt = bsp_cmdline_arg(param);
if ( !opt ) {
return false;
}
/*
* Fine the length, there can be more command line visible.
*/
length = 0;
while ((opt[length] != ' ') && (opt[length] != '\0')) {
++length;
if (length > NAME_MAX) {
printk("invalid option (%s): too long\n", param);
return false;
}
}
/*
* Only match up to a comma or NULL
*/
index = 0;
while ((opt[index] != '=') && (index < length)) {
++index;
}
if (opt[index] != '=') {
printk("invalid option (%s): no equals\n", param);
return false;
}
++index;
option = &opt[index];
while ((opt[index] != ',') && (index < length)) {
++index;
}
if (opt[index] == ',')
comma = &opt[index];
else
comma = NULL;
length = &opt[index] - option;
conscfg = console_find_console_entry( option, length, &minor );
if ( conscfg == NULL ) {
return false;
}
*minor_out = minor;
if (comma) {
option = comma + 1;
if (strncmp (option, "115200", sizeof ("115200") - 1) == 0)
conscfg->pDeviceParams = (void *)115200;
else if (strncmp (option, "57600", sizeof ("57600") - 1) == 0)
conscfg->pDeviceParams = (void *)57600;
else if (strncmp (option, "38400", sizeof ("38400") - 1) == 0)
conscfg->pDeviceParams = (void *)38400;
else if (strncmp (option, "19200", sizeof ("19200") - 1) == 0)
conscfg->pDeviceParams = (void *)19200;
else if (strncmp (option, "9600", sizeof ("9600") - 1) == 0)
conscfg->pDeviceParams = (void *)9600;
else if (strncmp (option, "4800", sizeof ("4800") - 1) == 0)
conscfg->pDeviceParams = (void *)4800;
}
return true;
}
/*
* Helper to retrieve device name
*/
static inline const char *get_name(
rtems_device_minor_number minor
)
{
return Console_Port_Tbl[minor]->sDeviceName;
}
/*
* Parse the arguments early so the printk and console ports are
* set appropriately.
*/
void pc386_parse_console_arguments(void)
{
rtems_device_minor_number minor;
rtems_device_minor_number minor_console = 0;
rtems_device_minor_number minor_printk = 0;
/*
* Assume that if only --console is specified, that printk() should
* follow that selection by default.
*/
if ( parse_printk_or_console( "--console=", &minor ) ) {
minor_console = minor;
minor_printk = minor;
}
/*
* But if explicitly specified, attempt to honor it.
*/
if ( parse_printk_or_console( "--printk=", &minor ) ) {
minor_printk = minor;
}
printk( "Console: %s printk: %s\n",
get_name(minor_console),get_name(minor_printk) );
/*
* Any output after this can cause problems until termios is initialised.
*/
Console_Port_Minor = minor_console;
BSPPrintkPort = minor_printk;
}
/*
* This handles the selection of the console after the devices are
* initialized.
*/
void bsp_console_select(void)
{
#ifdef RTEMS_RUNTIME_CONSOLE_SELECT
/*
* WARNING: This code is really needed any more and should be removed.
* references to COM1 and COM2 like they are wrong.
*/
if ( BSP_runtime_console_select )
BSP_runtime_console_select(&BSPPrintkPort, &Console_Port_Minor);
/*
* If no video card, fall back to serial port console
*/
if((Console_Port_Minor == BSP_CONSOLE_VGA)
&& (*(unsigned char*) NB_MAX_ROW_ADDR == 0)
&& (*(unsigned short*)NB_MAX_COL_ADDR == 0)) {
Console_Port_Minor = BSP_CONSOLE_COM2;
BSPPrintkPort = BSP_CONSOLE_COM1;
}
#endif
/*
* If the device that was selected isn't available then
* let the user know and select the first available device.
*/
if ( !bsp_Is_Available( Console_Port_Minor ) ) {
printk(
"Error finding %s setting console to first available\n",
get_name(Console_Port_Minor)
);
Console_Port_Minor = bsp_First_Available_Device();
}
}
