freebsd-dev/sys/dev/uart/uart_cpu_fdt.h
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

60 lines
2.3 KiB
C

/*-
* Copyright 2015 Michal Meloun
* 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 THE 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 THE 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.
*
* $FreeBSD$
*/
#ifndef _DEV_UART_CPU_FDT_H_
#define _DEV_UART_CPU_FDT_H_
#include <sys/linker_set.h>
#include <dev/ofw/ofw_bus_subr.h>
/*
* If your UART driver implements only uart_class and uses uart_cpu_fdt.c
* for device instantiation, then use UART_FDT_CLASS_AND_DEVICE for its
* declaration
*/
SET_DECLARE(uart_fdt_class_and_device_set, struct ofw_compat_data );
#define UART_FDT_CLASS_AND_DEVICE(data) \
DATA_SET(uart_fdt_class_and_device_set, data)
/*
* If your UART driver implements uart_class and custom device layer,
* then use UART_FDT_CLASS for its declaration
*/
SET_DECLARE(uart_fdt_class_set, struct ofw_compat_data );
#define UART_FDT_CLASS(data) \
DATA_SET(uart_fdt_class_set, data)
int uart_cpu_fdt_probe(struct uart_class **, bus_space_tag_t *,
bus_space_handle_t *, int *, u_int *, u_int *, u_int *);
int uart_fdt_get_clock(phandle_t node, pcell_t *cell);
int uart_fdt_get_shift(phandle_t node, pcell_t *cell);
int uart_fdt_get_io_width(phandle_t node, pcell_t *cell);
#endif /* _DEV_UART_CPU_FDT_H_ */