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intiovar.h revision 1.11 
      1 /*	$NetBSD: intiovar.h,v 1.11 2006/03/19 06:47:35 tsutsui 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Autoconfiguration definitions and prototypes for the hp300
     41  * internal i/o space.
     42  */
     43 
     44 #include <machine/bus.h>
     45 #include <machine/cpu.h>
     46 
     47 #include <arch/hp300/dev/intioreg.h>
     48 
     49 #define INTIO_MOD_LEN	8
     50 
     51 /*
     52  * Arguments used to attach a device to the internal i/o space.
     53  */
     54 struct intio_attach_args {
     55 	char ia_modname[INTIO_MOD_LEN+1];	/* module name */
     56 	bus_space_tag_t ia_bst;			/* bus space tag */
     57 	bus_addr_t ia_addr;			/* physical address */
     58 	bus_size_t ia_iobase;			/* intio iobase */
     59 	int ia_ipl;				/* interrupt priority level */
     60 };
     61 
     62 struct intio_builtins {
     63 	const char *ib_modname;			/* module name */
     64 	bus_size_t ib_offset;			/* intio offset */
     65 	int ib_ipl;				/* interrupt priority level */
     66 };
     67 
     68 /*
     69  * Devices such as the HIL and RTC chips are wired in a consistent
     70  * fashion.  These routines provide a uniform mechanism for accessing
     71  * the devices that are wired to the machine.  Doesn't include
     72  * memory-mapped devices such as framebuffers.
     73  */
     74 
     75 #define WAIT(bst,bsh)		\
     76 	while (bus_space_read_1(bst,bsh,INTIO_DEV_3xx_STAT) \
     77 		& INTIO_DEV_BUSY)
     78 #define DATAWAIT(bst,bsh)	\
     79 	while (!(bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT) \
     80 		& INTIO_DEV_DATA_READY))
     81 
     82 static inline int
     83 intio_device_readcmd(bus_space_tag_t bst, bus_space_handle_t bsh, int cmd,
     84     uint8_t *datap)
     85 {
     86 	uint8_t status;
     87 
     88 	if (cmd != 0) {
     89 		WAIT(bst, bsh);
     90 		bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
     91 	}
     92 	do {
     93 		DATAWAIT(bst, bsh);
     94 		status = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
     95 		*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
     96 	} while (((status >> INTIO_DEV_SRSHIFT) & INTIO_DEV_SRMASK)
     97 		!= INTIO_DEV_SR_DATAAVAIL);
     98 	return (0);
     99 }
    100 
    101 static inline int
    102 intio_device_writecmd(bus_space_tag_t bst, bus_space_handle_t bsh,
    103     int cmd, uint8_t *datap, int len)
    104 {
    105 
    106 	WAIT(bst, bsh);
    107 	bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
    108 	while (len--) {
    109 	WAIT(bst, bsh);
    110 		bus_space_write_1(bst, bsh, INTIO_DEV_3xx_DATA, *datap++);
    111 	}
    112 	return (0);
    113 }
    114 
    115 static inline int
    116 intio_device_readstate(bus_space_tag_t bst, bus_space_handle_t bsh,
    117     uint8_t *statusp, uint8_t *datap)
    118 {
    119 	*statusp = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
    120 	*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
    121 	return (0);
    122 }
    123 #undef WAIT
    124 #undef DATAWAIT
    125 
    126 #define INTIO_DEVSIZE	4096	/* large enough for all machines */
    127 
    128 #define intio_intr_establish(func, arg, ipl, priority)			\
    129 	intr_establish((func),(arg),(ipl),(priority))
    130