freebsd-dev/sys/powerpc/psim/uart_iobus.c
Matt Macy 381388b9c4 add snps IP uart support / genaralize UART
This is an amalgam of a patch by Doug Ambrisko to
generalize uart_acpi_find_device, imp moving the
ACPI table to uart_dev_ns8250.c and advice by jhb
to work around a bug in the EPYC 3151 BIOS
(the BIOS incorrectly marks the serial ports as
disabled)

Reviewed by: imp
MFC after: 8 weeks
Differential Revision: https://reviews.freebsd.org/D16432
2018-08-19 21:10:21 +00:00

90 lines
2.7 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright 2002 by Peter Grehan. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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.
*
* $FreeBSD$
*/
/*
* PSIM local bus 16550
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/tty.h>
#include <machine/bus.h>
#include <sys/timepps.h>
#include <dev/ofw/openfirm.h>
#include <powerpc/psim/iobusvar.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
static int uart_iobus_probe(device_t dev);
static device_method_t uart_iobus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, uart_iobus_probe),
DEVMETHOD(device_attach, uart_bus_attach),
DEVMETHOD(device_detach, uart_bus_detach),
{ 0, 0 }
};
static driver_t uart_iobus_driver = {
uart_driver_name,
uart_iobus_methods,
sizeof(struct uart_softc),
};
static int
uart_iobus_probe(device_t dev)
{
struct uart_softc *sc;
char *type;
type = iobus_get_name(dev);
if (strncmp(type, "com", 3) != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_class = &uart_ns8250_class;
device_set_desc(dev, "PSIM serial port");
return (uart_bus_probe(dev, 0, 0, 0, 0, 0, 0));
}
DRIVER_MODULE(uart, iobus, uart_iobus_driver, uart_devclass, 0, 0);