freebsd-dev/sys/arm/cavium/cns11xx/uart_bus_ec.c
Ruslan Bukin c214a270f5 Allow setting access-width for UART registers.
This is required for FDT's standard "reg-io-width" property
(similar to "reg-shift" property) found in many DTS files.

This fixes operation on Altera Arria 10 SOC Development Kit,
where standard ns8250 uart allows 4-byte access only.

Reviewed by:	kan, marcel
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D9785
2017-02-27 20:08:42 +00:00

77 lines
2.4 KiB
C

/*-
* Copyright (C) 2009 Yohanes Nugroho <yohanes@gmail.com>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
#include <dev/uart/uart_cpu.h>
#include <arm/cavium/cns11xx/econa_reg.h>
static int uart_ec_probe(device_t dev);
static device_method_t uart_ec_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, uart_ec_probe),
DEVMETHOD(device_attach, uart_bus_attach),
DEVMETHOD(device_detach, uart_bus_detach),
{ 0, 0 }
};
static driver_t uart_ec_driver = {
uart_driver_name,
uart_ec_methods,
sizeof(struct uart_softc),
};
static int
uart_ec_probe(device_t dev)
{
struct uart_softc *sc;
int status;
sc = device_get_softc(dev);
sc->sc_class = &uart_ns8250_class;
status = uart_bus_probe(dev, EC_UART_REGSHIFT, 0, EC_UART_CLOCK, 0, 0);
return (status);
}
DRIVER_MODULE(uart, econaarm, uart_ec_driver, uart_devclass, 0, 0);