405ada37fb
This is needed with the pl011 driver. Before this change it would default to a shift of 0, however the hardware places the registers at 4-byte addresses meaning the value should be 2. This patch fixes this for the pl011 when configured using the fdt. The other drivers have a default value of 0 to keep this a no-op. MFC after: 1 week
177 lines
4.3 KiB
C
177 lines
4.3 KiB
C
/*-
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* Copyright (c) 2003, 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_UART_CPU_H_
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#define _DEV_UART_CPU_H_
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#include <sys/kdb.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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struct uart_softc;
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/*
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* Low-level operations for use by console and/or debug port support.
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*/
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struct uart_ops {
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int (*probe)(struct uart_bas *);
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void (*init)(struct uart_bas *, int, int, int, int);
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void (*term)(struct uart_bas *);
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void (*putc)(struct uart_bas *, int);
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int (*rxready)(struct uart_bas *);
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int (*getc)(struct uart_bas *, struct mtx *);
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};
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extern bus_space_tag_t uart_bus_space_io;
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extern bus_space_tag_t uart_bus_space_mem;
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/*
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* Console and debug port device info.
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*/
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struct uart_devinfo {
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SLIST_ENTRY(uart_devinfo) next;
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struct uart_ops *ops;
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struct uart_bas bas;
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int baudrate;
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int databits;
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int stopbits;
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int parity;
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int type;
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#define UART_DEV_CONSOLE 0
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#define UART_DEV_DBGPORT 1
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#define UART_DEV_KEYBOARD 2
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int (*attach)(struct uart_softc*);
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int (*detach)(struct uart_softc*);
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void *cookie; /* Type dependent use. */
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struct mtx *hwmtx;
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struct uart_softc *sc; /* valid only from start of attach */
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};
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int uart_cpu_eqres(struct uart_bas *, struct uart_bas *);
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int uart_cpu_getdev(int, struct uart_devinfo *);
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int uart_getenv(int, struct uart_devinfo *, struct uart_class *);
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const char *uart_getname(struct uart_class *);
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struct uart_ops *uart_getops(struct uart_class *);
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int uart_getrange(struct uart_class *);
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u_int uart_getregshift(struct uart_class *);
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void uart_add_sysdev(struct uart_devinfo *);
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/*
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* Operations for low-level access to the UART. Primarily for use
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* by console and debug port logic.
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*/
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static __inline void
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uart_lock(struct mtx *hwmtx)
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{
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if (!kdb_active && hwmtx != NULL)
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mtx_lock_spin(hwmtx);
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}
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static __inline void
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uart_unlock(struct mtx *hwmtx)
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{
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if (!kdb_active && hwmtx != NULL)
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mtx_unlock_spin(hwmtx);
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}
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static __inline int
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uart_probe(struct uart_devinfo *di)
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{
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int res;
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uart_lock(di->hwmtx);
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res = di->ops->probe(&di->bas);
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uart_unlock(di->hwmtx);
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return (res);
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}
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static __inline void
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uart_init(struct uart_devinfo *di)
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{
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uart_lock(di->hwmtx);
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di->ops->init(&di->bas, di->baudrate, di->databits, di->stopbits,
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di->parity);
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uart_unlock(di->hwmtx);
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}
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static __inline void
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uart_term(struct uart_devinfo *di)
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{
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uart_lock(di->hwmtx);
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di->ops->term(&di->bas);
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uart_unlock(di->hwmtx);
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}
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static __inline void
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uart_putc(struct uart_devinfo *di, int c)
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{
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uart_lock(di->hwmtx);
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di->ops->putc(&di->bas, c);
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uart_unlock(di->hwmtx);
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}
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static __inline int
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uart_rxready(struct uart_devinfo *di)
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{
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int res;
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uart_lock(di->hwmtx);
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res = di->ops->rxready(&di->bas);
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uart_unlock(di->hwmtx);
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return (res);
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}
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static __inline int
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uart_poll(struct uart_devinfo *di)
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{
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int res;
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uart_lock(di->hwmtx);
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if (di->ops->rxready(&di->bas))
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res = di->ops->getc(&di->bas, NULL);
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else
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res = -1;
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uart_unlock(di->hwmtx);
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return (res);
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}
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static __inline int
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uart_getc(struct uart_devinfo *di)
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{
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return (di->ops->getc(&di->bas, di->hwmtx));
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}
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void uart_grab(struct uart_devinfo *di);
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void uart_ungrab(struct uart_devinfo *di);
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#endif /* _DEV_UART_CPU_H_ */
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