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/*
* Copyright (C) 2025 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* 16550-compatible UART
*
*/
#include <string.h>
#include <ipxe/serial.h>
#include <ipxe/ns16550.h>
/** Define a fixed ISA UART */
#define ISA_UART( NAME, BASE ) \
static struct ns16550_uart ns16550_ ## NAME = { \
.base = ( ( void * ) (BASE) ), \
.clock = NS16550_CLK_DEFAULT, \
}; \
struct uart NAME = { \
.refcnt = REF_INIT ( ref_no_free ), \
.name = #NAME, \
.op = &ns16550_operations, \
.priv = &ns16550_ ## NAME, \
}
/* Fixed ISA UARTs */
ISA_UART ( com1, COM1_BASE );
ISA_UART ( com2, COM2_BASE );
ISA_UART ( com3, COM3_BASE );
ISA_UART ( com4, COM4_BASE );
/**
* Register fixed ISA UARTs
*
* @ret rc Return status code
*/
int uart_register_fixed ( void ) {
static struct uart *ports[] = { COM1, COM2, COM3, COM4 };
unsigned int i;
int rc;
/* Register all fixed ISA UARTs */
for ( i = 0 ; i < ( sizeof ( ports ) / sizeof ( ports[0] ) ) ; i++ ) {
if ( ( rc = uart_register ( ports[i] ) ) != 0 ) {
DBGC ( ports[i], "UART could not register %s: %s\n",
ports[i]->name, strerror ( rc ) );
return rc;
}
}
return 0;
}
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