482 lines
12 KiB
C
482 lines
12 KiB
C
/* $NetBSD: dio.c,v 1.28 2005/01/02 12:03:12 tsutsui Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998 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 and mapping support for the DIO bus.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dio.c,v 1.28 2005/01/02 12:03:12 tsutsui Exp $");
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#define _HP300_INTR_H_PRIVATE
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <uvm/uvm_extern.h>
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#include <machine/autoconf.h>
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#include <machine/cpu.h>
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#include <machine/hp300spu.h>
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#include <hp300/dev/dmavar.h>
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#include <hp300/dev/dioreg.h>
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#include <hp300/dev/diovar.h>
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#include <hp300/dev/diodevs.h>
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#include <hp300/dev/diodevs_data.h>
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#include "locators.h"
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#define diocf_scode cf_loc[DIOCF_SCODE]
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struct dio_softc {
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struct device sc_dev;
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struct bus_space_tag sc_tag;
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};
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static int dio_scodesize(struct dio_attach_args *);
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static const char *dio_devinfo(struct dio_attach_args *, char *, size_t);
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static int diomatch(struct device *, struct cfdata *, void *);
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static void dioattach(struct device *, struct device *, void *);
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static int dioprint(void *, const char *);
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static int diosubmatch(struct device *, struct cfdata *, void *);
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CFATTACH_DECL(dio, sizeof(struct dio_softc),
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diomatch, dioattach, NULL, NULL);
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static int
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diomatch(struct device *parent, struct cfdata *match, void *aux)
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{
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static int dio_matched = 0;
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/* Allow only one instance. */
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if (dio_matched)
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return (0);
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dio_matched = 1;
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return (1);
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}
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static void
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dioattach(struct device *parent, struct device *self, void *aux)
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{
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struct dio_softc *sc = (struct dio_softc *)self;
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struct dio_attach_args da;
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caddr_t pa, va;
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bus_space_tag_t bst = &sc->sc_tag;
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int scode, scmax, scodesize;
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printf("\n");
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memset(bst, 0, sizeof(struct bus_space_tag));
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bst->bustype = HP300_BUS_SPACE_DIO;
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scmax = DIO_SCMAX(machineid);
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for (scode = 0; scode < scmax; ) {
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if (DIO_INHOLE(scode)) {
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scode++;
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continue;
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}
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/*
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* Temporarily map the space corresponding to
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* the current select code unless:
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*/
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pa = dio_scodetopa(scode);
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va = iomap(pa, PAGE_SIZE);
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if (va == NULL) {
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printf("%s: can't map scode %d\n",
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self->dv_xname, scode);
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scode++;
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continue;
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}
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/* Check for hardware. */
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if (badaddr(va)) {
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iounmap(va, PAGE_SIZE);
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scode++;
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continue;
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}
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/* Fill out attach args. */
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memset(&da, 0, sizeof(da));
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da.da_bst = bst;
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da.da_scode = scode;
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da.da_id = DIO_ID(va);
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if (DIO_ISFRAMEBUFFER(da.da_id))
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da.da_secid = DIO_SECID(va);
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da.da_addr = (bus_addr_t)dio_scodetopa(scode);
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da.da_size = DIO_SIZE(scode, va);
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scodesize = dio_scodesize(&da);
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if (DIO_ISDIO(scode))
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da.da_size *= scodesize;
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da.da_ipl = DIO_IPL(va);
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/* No longer need the device to be mapped. */
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iounmap(va, PAGE_SIZE);
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/* Attach matching device. */
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config_found_sm(self, &da, dioprint, diosubmatch);
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scode += scodesize;
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}
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}
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static int
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diosubmatch(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct dio_attach_args *da = aux;
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if (cf->diocf_scode != DIOCF_SCODE_DEFAULT &&
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cf->diocf_scode != da->da_scode)
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return (0);
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return (config_match(parent, cf, aux));
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}
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static int
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dioprint(void *aux, const char *pnp)
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{
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struct dio_attach_args *da = aux;
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char buf[128];
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if (pnp)
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aprint_normal("%s at %s",
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dio_devinfo(da, buf, sizeof(buf)), pnp);
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aprint_normal(" scode %d ipl %d", da->da_scode, da->da_ipl);
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return (UNCONF);
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}
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/*
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* Convert a select code to a system physical address.
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*/
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void *
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dio_scodetopa(int scode)
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{
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u_long rval;
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if (DIO_ISDIO(scode))
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rval = DIO_BASE + (scode * DIO_DEVSIZE);
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else if (DIO_ISDIOII(scode))
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rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE);
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else
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rval = 0;
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return ((void *)rval);
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}
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/*
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* Return the select code size for this device, defaulting to 1
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* if we don't know what kind of device we have.
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*/
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static int
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dio_scodesize(struct dio_attach_args *da)
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{
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int i;
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/*
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* Find the dio_devdata matchind the primary id.
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* If we're a framebuffer, we also check the secondary id.
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*/
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for (i = 0; i < DIO_NDEVICES; i++) {
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if (da->da_id == dio_devdatas[i].dd_id) {
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if (DIO_ISFRAMEBUFFER(da->da_id)) {
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if (da->da_secid == dio_devdatas[i].dd_secid) {
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goto foundit;
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}
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} else {
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foundit:
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return (dio_devdatas[i].dd_nscode);
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}
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}
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}
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/*
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* Device is unknown. Print a warning and assume a default.
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*/
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printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n",
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da->da_id, da->da_secid);
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return (1);
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}
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/*
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* Return a reasonable description of a DIO device.
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*/
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static const char *
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dio_devinfo(struct dio_attach_args *da, char *buf, size_t buflen)
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{
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#ifdef DIOVERBOSE
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int i;
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#endif
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memset(buf, 0, buflen);
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#ifdef DIOVERBOSE
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/*
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* Find the description matching our primary id.
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* If we're a framebuffer, we also check the secondary id.
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*/
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for (i = 0; i < DIO_NDEVICES; i++) {
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if (da->da_id == dio_devdescs[i].dd_id) {
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if (DIO_ISFRAMEBUFFER(da->da_id)) {
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if (da->da_secid == dio_devdescs[i].dd_secid) {
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goto foundit;
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}
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} else {
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foundit:
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sprintf(buf, "%s", dio_devdescs[i].dd_desc);
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return (buf);
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}
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}
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}
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#endif /* DIOVERBOSE */
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/*
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* Device is unknown. Construct something reasonable.
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*/
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sprintf(buf, "device id = 0x%x secid = 0x%x",
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da->da_id, da->da_secid);
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return (buf);
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}
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/*
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* Establish an interrupt handler for a DIO device.
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*/
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void *
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dio_intr_establish(int (*func)(void *), void *arg, int ipl, int priority)
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{
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void *ih;
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ih = intr_establish(func, arg, ipl, priority);
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if (priority == IPL_BIO)
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dmacomputeipl();
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return (ih);
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}
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/*
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* Remove an interrupt handler for a DIO device.
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*/
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void
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dio_intr_disestablish(void *arg)
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{
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struct hp300_intrhand *ih = arg;
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int priority = ih->ih_priority;
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intr_disestablish(arg);
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if (priority == IPL_BIO)
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dmacomputeipl();
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}
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/*
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* DIO specific bus_space(9) support functions.
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*/
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static uint8_t dio_bus_space_read_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t);
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static void dio_bus_space_write_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, uint8_t);
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static void dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t);
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static void dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t);
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static void dio_bus_space_read_region_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t);
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static void dio_bus_space_write_region_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t);
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static void dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, uint8_t, bus_size_t);
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static void dio_bus_space_set_region_oddbyte_1(bus_space_tag_t,
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bus_space_handle_t, bus_size_t, uint8_t, bus_size_t);
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/*
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* dio_set_bus_space_oddbyte():
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* Override bus_space functions in bus_space_tag_t
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* for devices which have odd byte address space.
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*/
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void
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dio_set_bus_space_oddbyte(bus_space_tag_t bst)
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{
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/* XXX only 1-byte functions for now */
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bst->bsr1 = dio_bus_space_read_oddbyte_1;
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bst->bsw1 = dio_bus_space_write_oddbyte_1;
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bst->bsrm1 = dio_bus_space_read_multi_oddbyte_1;
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bst->bswm1 = dio_bus_space_write_multi_oddbyte_1;
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bst->bsrr1 = dio_bus_space_read_region_oddbyte_1;
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bst->bswr1 = dio_bus_space_write_region_oddbyte_1;
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bst->bssm1 = dio_bus_space_set_multi_oddbyte_1;
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bst->bssr1 = dio_bus_space_set_region_oddbyte_1;
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}
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static uint8_t
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dio_bus_space_read_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset)
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{
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return *(volatile uint8_t *)(bsh + (offset << 1) + 1);
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}
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static void
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dio_bus_space_write_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, uint8_t val)
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{
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*(volatile uint8_t *)(bsh + (offset << 1) + 1) = val;
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}
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static void
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dio_bus_space_read_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, uint8_t *addr, bus_size_t len)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%a1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%a0@,%%a1@+ ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len)
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: "%a0","%a1","%d0");
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}
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static void
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dio_bus_space_write_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, const uint8_t *addr, bus_size_t len)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%a1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%a1@+,%%a0@ ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len)
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: "%a0","%a1","%d0");
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}
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static void
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dio_bus_space_read_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, uint8_t *addr, bus_size_t len)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%a1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%a0@,%%a1@+ ;\n"
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" addql #2,%%a0 ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len)
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: "%a0","%a1","%d0");
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}
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static void
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dio_bus_space_write_region_oddbyte_1(bus_space_tag_t bst,
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bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr,
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bus_size_t len)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%a1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%a1@+,%%a0@ ;\n"
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" addql #2,%%a0 ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (addr), "g" (len)
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: "%a0","%a1","%d0");
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}
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static void
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dio_bus_space_set_multi_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, uint8_t val, bus_size_t count)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%d1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%d1,%%a0@ ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count)
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: "%a0","%d0","%d1");
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}
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static void
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dio_bus_space_set_region_oddbyte_1(bus_space_tag_t bst, bus_space_handle_t bsh,
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bus_size_t offset, uint8_t val, bus_size_t count)
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{
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__asm __volatile (
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" movl %0,%%a0 ;\n"
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" movl %1,%%d1 ;\n"
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" movl %2,%%d0 ;\n"
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"1: movb %%d1,%%a0@ ;\n"
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" addql #2,%%a0 ;\n"
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" subql #1,%%d0 ;\n"
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" jne 1b"
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:
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: "r" (bsh + (offset << 1) + 1), "g" (val), "g" (count)
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: "%a0","%d0","%d1");
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}
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