129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/* $NetBSD: intiovar.h,v 1.5 2001/11/17 23:33:22 gmcgarry Exp $ */
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/*-
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* Copyright (c) 1996, 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Autoconfiguration definitions and prototypes for the hp300
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* internal i/o space.
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*/
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <arch/hp300/dev/intioreg.h>
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#define INTIO_MOD_LEN 8
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/*
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* Arguments used to attach a device to the internal i/o space.
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*/
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struct intio_attach_args {
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char ia_modname[INTIO_MOD_LEN+1]; /* module name */
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bus_space_tag_t ia_bst; /* bus space tag */
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bus_addr_t ia_addr; /* physical address */
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bus_size_t ia_iobase; /* intio iobase */
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int ia_ipl; /* interrupt priority level */
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};
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struct intio_builtins {
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char *ib_modname; /* module name */
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bus_size_t ib_offset; /* intio offset */
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int ib_ipl; /* interrupt priority level */
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};
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/*
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* Devices such as the HIL and RTC chips are wired in a consistent
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* fashion. These routines provide a uniform mechanism for accessing
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* the devices that are wired to the machine. Doesn't include
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* memory-mapped devices such as framebuffers.
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*/
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#define WAIT(bst,bsh) \
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while (bus_space_read_1(bst,bsh,INTIO_DEV_3xx_STAT) \
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& INTIO_DEV_BUSY)
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#define DATAWAIT(bst,bsh) \
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while (!(bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT) \
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& INTIO_DEV_DATA_READY))
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static __inline int
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intio_device_readcmd(bus_space_tag_t bst, bus_space_handle_t bsh, int cmd,
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u_int8_t *datap)
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{
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u_int8_t status;
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if (cmd != 0) {
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WAIT(bst, bsh);
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bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
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}
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do {
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DATAWAIT(bst, bsh);
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status = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
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*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
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} while (((status >> INTIO_DEV_SRSHIFT) & INTIO_DEV_SRMASK)
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!= INTIO_DEV_SR_DATAAVAIL);
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return (0);
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}
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static __inline int
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intio_device_writecmd(bus_space_tag_t bst, bus_space_handle_t bsh,
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int cmd, u_int8_t *datap, int len)
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{
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WAIT(bst,bsh);
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bus_space_write_1(bst, bsh, INTIO_DEV_3xx_CMD, cmd);
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while (len--) {
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WAIT(bst,bsh);
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bus_space_write_1(bst, bsh, INTIO_DEV_3xx_DATA, *datap++);
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}
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return (0);
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}
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static __inline int
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intio_device_readstate(bus_space_tag_t bst, bus_space_handle_t bsh,
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u_int8_t *statusp, u_int8_t *datap)
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{
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*statusp = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
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*datap = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_DATA);
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return (0);
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}
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#undef WAIT
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#undef DATAWAIT
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#define INTIO_DEVSIZE 4096 /* large enough for all machines */
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#define intio_intr_establish(func, arg, ipl, priority) \
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intr_establish((func),(arg),(ipl),(priority))
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