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/* $NetBSD: siovar.h,v 1.9 2021/09/25 15:18:38 tsutsui Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
struct sio_attach_args {
int channel;
int hwflags;
};
struct sioreg {
volatile uint8_t sio_data;
uint8_t pad0;
volatile uint8_t sio_cmd;
uint8_t pad1;
#define sio_stat sio_cmd
};
struct sio_softc {
device_t sc_dev;
struct sioreg *sc_ctl;
struct {
void (*ih_func)(void *);
void *ih_arg;
} sc_intrhand[2];
};
static inline uint16_t getsiocsr(struct sioreg *);
static inline void setsioreg(struct sioreg *, int, int);
static inline int siogetc(struct sioreg *);
static inline void sioputc(struct sioreg *, int);
static inline uint16_t
getsiocsr(struct sioreg *sio)
{
uint16_t val;
val = sio->sio_stat << 8;
sio->sio_cmd = RR1;
val |= sio->sio_stat;
return val;
}
static inline void
setsioreg(struct sioreg *sio, int regno, int val)
{
if (regno != WR0)
sio->sio_cmd = regno;
sio->sio_cmd = val;
}
static inline int
siogetc(struct sioreg *sio)
{
int s, c;
s = splhigh();
while ((getsiocsr(sio) & RR_RXRDY) == 0)
continue;
c = sio->sio_data;
splx(s);
return c;
}
static inline void
sioputc(struct sioreg *sio, int c)
{
int s;
s = splhigh();
while ((getsiocsr(sio) & RR_TXRDY) == 0)
continue;
sio->sio_cmd = WR0_RSTPEND;
sio->sio_data = c;
splx(s);
}
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