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/*-
* Copyright (c) 2003, 2004 Marcel Moolenaar
* 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 ``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.
*
* $FreeBSD$
*/
#ifndef _DEV_UART_CPU_H_
#define _DEV_UART_CPU_H_
#include <sys/kdb.h>
#include <sys/lock.h>
#include <sys/mutex.h>
struct uart_softc;
/*
* Low-level operations for use by console and/or debug port support.
*/
struct uart_ops {
int (*probe)(struct uart_bas *);
void (*init)(struct uart_bas *, int, int, int, int);
void (*term)(struct uart_bas *);
void (*putc)(struct uart_bas *, int);
int (*rxready)(struct uart_bas *);
int (*getc)(struct uart_bas *, struct mtx *);
};
extern bus_space_tag_t uart_bus_space_io;
extern bus_space_tag_t uart_bus_space_mem;
/*
* Console and debug port device info.
*/
struct uart_devinfo {
SLIST_ENTRY(uart_devinfo) next;
struct uart_ops *ops;
struct uart_bas bas;
int baudrate;
int databits;
int stopbits;
int parity;
int type;
#define UART_DEV_CONSOLE 0
#define UART_DEV_DBGPORT 1
#define UART_DEV_KEYBOARD 2
int (*attach)(struct uart_softc*);
int (*detach)(struct uart_softc*);
void *cookie; /* Type dependent use. */
struct mtx *hwmtx;
struct uart_softc *sc; /* valid only from start of attach */
};
int uart_cpu_eqres(struct uart_bas *, struct uart_bas *);
int uart_cpu_getdev(int, struct uart_devinfo *);
int uart_getenv(int, struct uart_devinfo *, struct uart_class *);
const char *uart_getname(struct uart_class *);
struct uart_ops *uart_getops(struct uart_class *);
int uart_getrange(struct uart_class *);
void uart_add_sysdev(struct uart_devinfo *);
/*
* Operations for low-level access to the UART. Primarily for use
* by console and debug port logic.
*/
static __inline void
uart_lock(struct mtx *hwmtx)
{
if (!kdb_active && hwmtx != NULL)
mtx_lock_spin(hwmtx);
}
static __inline void
uart_unlock(struct mtx *hwmtx)
{
if (!kdb_active && hwmtx != NULL)
mtx_unlock_spin(hwmtx);
}
static __inline int
uart_probe(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
res = di->ops->probe(&di->bas);
uart_unlock(di->hwmtx);
return (res);
}
static __inline void
uart_init(struct uart_devinfo *di)
{
uart_lock(di->hwmtx);
di->ops->init(&di->bas, di->baudrate, di->databits, di->stopbits,
di->parity);
uart_unlock(di->hwmtx);
}
static __inline void
uart_term(struct uart_devinfo *di)
{
uart_lock(di->hwmtx);
di->ops->term(&di->bas);
uart_unlock(di->hwmtx);
}
static __inline void
uart_putc(struct uart_devinfo *di, int c)
{
uart_lock(di->hwmtx);
di->ops->putc(&di->bas, c);
uart_unlock(di->hwmtx);
}
static __inline int
uart_rxready(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
res = di->ops->rxready(&di->bas);
uart_unlock(di->hwmtx);
return (res);
}
static __inline int
uart_poll(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
if (di->ops->rxready(&di->bas))
res = di->ops->getc(&di->bas, NULL);
else
res = -1;
uart_unlock(di->hwmtx);
return (res);
}
static __inline int
uart_getc(struct uart_devinfo *di)
{
return (di->ops->getc(&di->bas, di->hwmtx));
}
void uart_grab(struct uart_devinfo *di);
void uart_ungrab(struct uart_devinfo *di);
#endif /* _DEV_UART_CPU_H_ */
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