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      1  1.9   tsutsui /* $NetBSD: siovar.h,v 1.9 2021/09/25 15:18:38 tsutsui Exp $ */
      2  1.1  nisimura 
      3  1.1  nisimura /*-
      4  1.1  nisimura  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  1.1  nisimura  * All rights reserved.
      6  1.1  nisimura  *
      7  1.1  nisimura  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1  nisimura  * by Tohru Nishimura.
      9  1.1  nisimura  *
     10  1.1  nisimura  * Redistribution and use in source and binary forms, with or without
     11  1.1  nisimura  * modification, are permitted provided that the following conditions
     12  1.1  nisimura  * are met:
     13  1.1  nisimura  * 1. Redistributions of source code must retain the above copyright
     14  1.1  nisimura  *    notice, this list of conditions and the following disclaimer.
     15  1.1  nisimura  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1  nisimura  *    notice, this list of conditions and the following disclaimer in the
     17  1.1  nisimura  *    documentation and/or other materials provided with the distribution.
     18  1.1  nisimura  *
     19  1.1  nisimura  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1  nisimura  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1  nisimura  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1  nisimura  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1  nisimura  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1  nisimura  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1  nisimura  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1  nisimura  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1  nisimura  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1  nisimura  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1  nisimura  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1  nisimura  */
     31  1.1  nisimura 
     32  1.1  nisimura struct sio_attach_args {
     33  1.1  nisimura 	int channel;
     34  1.1  nisimura 	int hwflags;
     35  1.1  nisimura };
     36  1.1  nisimura 
     37  1.1  nisimura struct sioreg {
     38  1.6   tsutsui 	volatile uint8_t sio_data;
     39  1.6   tsutsui 	uint8_t	pad0;
     40  1.6   tsutsui 	volatile uint8_t sio_cmd;
     41  1.6   tsutsui 	uint8_t pad1;
     42  1.1  nisimura #define sio_stat sio_cmd
     43  1.1  nisimura };
     44  1.1  nisimura 
     45  1.8   tsutsui struct sio_softc {
     46  1.8   tsutsui 	device_t sc_dev;
     47  1.8   tsutsui 	struct sioreg *sc_ctl;
     48  1.8   tsutsui 	struct {
     49  1.8   tsutsui 		void (*ih_func)(void *);
     50  1.8   tsutsui 		void *ih_arg;
     51  1.8   tsutsui 	} sc_intrhand[2];
     52  1.8   tsutsui };
     53  1.8   tsutsui 
     54  1.9   tsutsui static inline uint16_t getsiocsr(struct sioreg *);
     55  1.9   tsutsui static inline void setsioreg(struct sioreg *, int, int);
     56  1.9   tsutsui 
     57  1.9   tsutsui static inline int siogetc(struct sioreg *);
     58  1.9   tsutsui static inline void sioputc(struct sioreg *, int);
     59  1.9   tsutsui 
     60  1.9   tsutsui static inline uint16_t
     61  1.9   tsutsui getsiocsr(struct sioreg *sio)
     62  1.9   tsutsui {
     63  1.9   tsutsui 	uint16_t val;
     64  1.9   tsutsui 
     65  1.9   tsutsui 	val = sio->sio_stat << 8;
     66  1.9   tsutsui 	sio->sio_cmd = RR1;
     67  1.9   tsutsui 	val |= sio->sio_stat;
     68  1.9   tsutsui 
     69  1.9   tsutsui 	return val;
     70  1.9   tsutsui }
     71  1.9   tsutsui 
     72  1.9   tsutsui static inline void
     73  1.9   tsutsui setsioreg(struct sioreg *sio, int regno, int val)
     74  1.9   tsutsui {
     75  1.9   tsutsui 
     76  1.9   tsutsui 	if (regno != WR0)
     77  1.9   tsutsui 		sio->sio_cmd = regno;
     78  1.9   tsutsui 	sio->sio_cmd = val;
     79  1.9   tsutsui }
     80  1.9   tsutsui 
     81  1.9   tsutsui static inline int
     82  1.9   tsutsui siogetc(struct sioreg *sio)
     83  1.9   tsutsui {
     84  1.9   tsutsui 	int s, c;
     85  1.9   tsutsui 
     86  1.9   tsutsui 	s = splhigh();
     87  1.9   tsutsui 	while ((getsiocsr(sio) & RR_RXRDY) == 0)
     88  1.9   tsutsui 		continue;
     89  1.9   tsutsui 	c = sio->sio_data;
     90  1.9   tsutsui 	splx(s);
     91  1.9   tsutsui 
     92  1.9   tsutsui 	return c;
     93  1.9   tsutsui }
     94  1.9   tsutsui 
     95  1.9   tsutsui static inline void
     96  1.9   tsutsui sioputc(struct sioreg *sio, int c)
     97  1.9   tsutsui {
     98  1.9   tsutsui 	int s;
     99  1.9   tsutsui 
    100  1.9   tsutsui 	s = splhigh();
    101  1.9   tsutsui 	while ((getsiocsr(sio) & RR_TXRDY) == 0)
    102  1.9   tsutsui 		continue;
    103  1.9   tsutsui 	sio->sio_cmd = WR0_RSTPEND;
    104  1.9   tsutsui 	sio->sio_data = c;
    105  1.9   tsutsui 	splx(s);
    106  1.9   tsutsui }
    107