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intiovar.h revision 1.14 
      1 /*	$NetBSD: intiovar.h,v 1.14 2023/08/07 23:28:58 mrg Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1998, 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Autoconfiguration definitions and prototypes for the hp300
     34  * internal i/o space.
     35  */
     36 
     37 #include <machine/bus.h>
     38 #include <machine/cpu.h>
     39 
     40 #include <arch/hp300/dev/intioreg.h>
     41 
     42 #define INTIO_MOD_LEN	8
     43 
     44 /*
     45  * Arguments used to attach a device to the internal i/o space.
     46  */
     47 struct intio_attach_args {
     48 	char ia_modname[INTIO_MOD_LEN];		/* module name */
     49 	bus_space_tag_t ia_bst;			/* bus space tag */
     50 	bus_addr_t ia_addr;			/* physical address */
     51 	bus_size_t ia_iobase;			/* intio iobase */
     52 	int ia_ipl;				/* interrupt priority level */
     53 };
     54 
     55 struct intio_builtins {
     56 	const char *ib_modname;			/* module name */
     57 	bus_size_t ib_offset;			/* intio offset */
     58 	int ib_ipl;				/* interrupt priority level */
     59 };
     60 
     61 /*
     62  * Devices such as the HIL and RTC chips are wired in a consistent
     63  * fashion.  These routines provide a uniform mechanism for accessing
     64  * the devices that are wired to the machine.  Doesn't include
     65  * memory-mapped devices such as framebuffers.
     66  */
     67 
     68 #define WAIT(bst,bsh)		\
     69 	while (bus_space_read_1(bst,bsh,INTIO_DEV_3xx_STAT) \
     70 		& INTIO_DEV_BUSY)
     71 #define DATAWAIT(bst,bsh)	\
     72 	while (!(bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT) \
     73 		& INTIO_DEV_DATA_READY))
     74 
     75 static inline int
     76 intio_device_readcmd(bus_space_tag_t bst, bus_space_handle_t bsh, int cmd,
     77     uint8_t *datap)
     78 {
     79 	uint8_t status;
     80 
     81 	if (cmd != 0) {
     82 		WAIT(bst, bsh);
     83 		bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
     84 	}
     85 	do {
     86 		DATAWAIT(bst, bsh);
     87 		status = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
     88 		*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
     89 	} while (((status >> INTIO_DEV_SRSHIFT) & INTIO_DEV_SRMASK)
     90 		!= INTIO_DEV_SR_DATAAVAIL);
     91 	return (0);
     92 }
     93 
     94 static inline int
     95 intio_device_writecmd(bus_space_tag_t bst, bus_space_handle_t bsh,
     96     int cmd, uint8_t *datap, int len)
     97 {
     98 
     99 	WAIT(bst, bsh);
    100 	bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
    101 	while (len--) {
    102 		WAIT(bst, bsh);
    103 		bus_space_write_1(bst, bsh, INTIO_DEV_3xx_DATA, *datap++);
    104 	}
    105 	return (0);
    106 }
    107 
    108 static inline int
    109 intio_device_readstate(bus_space_tag_t bst, bus_space_handle_t bsh,
    110     uint8_t *statusp, uint8_t *datap)
    111 {
    112 	*statusp = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
    113 	*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
    114 	return (0);
    115 }
    116 #undef WAIT
    117 #undef DATAWAIT
    118 
    119 #define INTIO_DEVSIZE	4096	/* large enough for all machines */
    120 
    121 #define intio_intr_establish(func, arg, ipl, priority)			\
    122 	intr_establish((func),(arg),(ipl),(priority))
    123