517 lines
14 KiB
C
517 lines
14 KiB
C
/* $NetBSD: puc.c,v 1.7 2000/07/29 17:43:38 jlam Exp $ */
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/*-
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* Copyright (c) 2002 JF Hay. All rights reserved.
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* Copyright (c) 2000 M. Warner Losh. All rights reserved.
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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 unmodified, this list of conditions, and the following
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1996, 1998, 1999
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* Christopher G. Demetriou. All rights reserved.
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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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* PCI "universal" communication card device driver, glues com, lpt,
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* and similar ports to PCI via bridge chip often much larger than
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* the devices being glued.
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*
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* Author: Christopher G. Demetriou, May 14, 1998 (derived from NetBSD
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* sys/dev/pci/pciide.c, revision 1.6).
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*
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* These devices could be (and some times are) described as
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* communications/{serial,parallel}, etc. devices with known
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* programming interfaces, but those programming interfaces (in
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* particular the BAR assignments for devices, etc.) in fact are not
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* particularly well defined.
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*
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* After I/we have seen more of these devices, it may be possible
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* to generalize some of these bits. In particular, devices which
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* describe themselves as communications/serial/16[45]50, and
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* communications/parallel/??? might be attached via direct
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* 'com' and 'lpt' attachments to pci.
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*/
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#include "opt_puc.h"
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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/bus.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#define PUC_ENTRAILS 1
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#include <dev/puc/pucvar.h>
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struct puc_device {
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struct resource_list resources;
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u_int serialfreq;
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};
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static void puc_intr(void *arg);
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static int puc_find_free_unit(char *);
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#ifdef PUC_DEBUG
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static void puc_print_resource_list(struct resource_list *);
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#endif
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devclass_t puc_devclass;
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static int
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puc_port_bar_index(struct puc_softc *sc, int bar)
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{
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int i;
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for (i = 0; i < PUC_MAX_BAR; i += 1) {
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if (!sc->sc_bar_mappings[i].used)
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break;
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if (sc->sc_bar_mappings[i].bar == bar)
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return (i);
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}
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sc->sc_bar_mappings[i].bar = bar;
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sc->sc_bar_mappings[i].used = 1;
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return (i);
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}
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int
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puc_attach(device_t dev, const struct puc_device_description *desc)
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{
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char *typestr;
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int bidx, childunit, i, irq_setup, rid;
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struct puc_softc *sc;
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struct puc_device *pdev;
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struct resource *res;
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struct resource_list_entry *rle;
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sc = (struct puc_softc *)device_get_softc(dev);
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bzero(sc, sizeof(*sc));
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sc->sc_desc = desc;
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if (sc->sc_desc == NULL)
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return (ENXIO);
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#ifdef PUC_DEBUG
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bootverbose = 1;
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printf("puc: name: %s\n", sc->sc_desc->name);
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#endif
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rid = 0;
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res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
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RF_ACTIVE | RF_SHAREABLE);
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if (!res)
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return (ENXIO);
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sc->irqres = res;
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sc->irqrid = rid;
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#ifdef PUC_FASTINTR
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irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
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INTR_TYPE_TTY | INTR_FAST, puc_intr, sc, &sc->intr_cookie);
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if (irq_setup == 0)
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sc->fastintr = INTR_FAST;
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else
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irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
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INTR_TYPE_TTY, puc_intr, sc, &sc->intr_cookie);
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#else
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irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
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INTR_TYPE_TTY, puc_intr, sc, &sc->intr_cookie);
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#endif
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if (irq_setup != 0)
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return (ENXIO);
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rid = 0;
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
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if (i > 0 && rid == sc->sc_desc->ports[i].bar)
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sc->barmuxed = 1;
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rid = sc->sc_desc->ports[i].bar;
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bidx = puc_port_bar_index(sc, rid);
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if (sc->sc_bar_mappings[bidx].res != NULL)
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continue;
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res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0ul, ~0ul, 1, RF_ACTIVE);
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if (res == NULL) {
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printf("could not get resource\n");
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continue;
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}
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sc->sc_bar_mappings[bidx].res = res;
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#ifdef PUC_DEBUG
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printf("port rid %d bst %x, start %x, end %x\n", rid,
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(u_int)rman_get_bustag(res), (u_int)rman_get_start(res),
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(u_int)rman_get_end(res));
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#endif
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}
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if (desc->init != NULL) {
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i = desc->init(sc);
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if (i != 0)
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return (i);
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}
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
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rid = sc->sc_desc->ports[i].bar;
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bidx = puc_port_bar_index(sc, rid);
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if (sc->sc_bar_mappings[bidx].res == NULL)
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continue;
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switch (sc->sc_desc->ports[i].type) {
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case PUC_PORT_TYPE_COM:
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typestr = "sio";
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break;
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default:
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continue;
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}
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pdev = malloc(sizeof(struct puc_device), M_DEVBUF,
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M_NOWAIT | M_ZERO);
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if (!pdev)
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continue;
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resource_list_init(&pdev->resources);
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/* First fake up an IRQ resource. */
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resource_list_add(&pdev->resources, SYS_RES_IRQ, 0,
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rman_get_start(sc->irqres), rman_get_end(sc->irqres),
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rman_get_end(sc->irqres) - rman_get_start(sc->irqres) + 1);
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rle = resource_list_find(&pdev->resources, SYS_RES_IRQ, 0);
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rle->res = sc->irqres;
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/* Now fake an IOPORT resource */
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res = sc->sc_bar_mappings[bidx].res;
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resource_list_add(&pdev->resources, SYS_RES_IOPORT, 0,
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rman_get_start(res) + sc->sc_desc->ports[i].offset,
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rman_get_start(res) + sc->sc_desc->ports[i].offset + 8 - 1,
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8);
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rle = resource_list_find(&pdev->resources, SYS_RES_IOPORT, 0);
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if (sc->barmuxed == 0) {
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rle->res = sc->sc_bar_mappings[bidx].res;
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} else {
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rle->res = malloc(sizeof(struct resource), M_DEVBUF,
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M_WAITOK | M_ZERO);
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if (rle->res == NULL) {
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free(pdev, M_DEVBUF);
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return (ENOMEM);
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}
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rle->res->r_start = rman_get_start(res) +
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sc->sc_desc->ports[i].offset;
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rle->res->r_end = rle->res->r_start + 8 - 1;
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rle->res->r_bustag = rman_get_bustag(res);
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bus_space_subregion(rle->res->r_bustag,
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rman_get_bushandle(res),
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sc->sc_desc->ports[i].offset, 8,
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&rle->res->r_bushandle);
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}
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pdev->serialfreq = sc->sc_desc->ports[i].serialfreq;
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childunit = puc_find_free_unit(typestr);
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sc->sc_ports[i].dev = device_add_child(dev, typestr, childunit);
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if (sc->sc_ports[i].dev == NULL) {
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if (sc->barmuxed) {
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bus_space_unmap(rman_get_bustag(rle->res),
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rman_get_bushandle(rle->res),
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8);
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free(rle->res, M_DEVBUF);
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free(pdev, M_DEVBUF);
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}
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continue;
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}
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device_set_ivars(sc->sc_ports[i].dev, pdev);
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device_set_desc(sc->sc_ports[i].dev, sc->sc_desc->name);
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if (!bootverbose)
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device_quiet(sc->sc_ports[i].dev);
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#ifdef PUC_DEBUG
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printf("puc: type %d, bar %x, offset %x\n",
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sc->sc_desc->ports[i].type,
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sc->sc_desc->ports[i].bar,
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sc->sc_desc->ports[i].offset);
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puc_print_resource_list(&pdev->resources);
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#endif
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device_set_flags(sc->sc_ports[i].dev,
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sc->sc_desc->ports[i].flags);
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if (device_probe_and_attach(sc->sc_ports[i].dev) != 0) {
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if (sc->barmuxed) {
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bus_space_unmap(rman_get_bustag(rle->res),
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rman_get_bushandle(rle->res),
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8);
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free(rle->res, M_DEVBUF);
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free(pdev, M_DEVBUF);
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}
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}
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}
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#ifdef PUC_DEBUG
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bootverbose = 0;
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#endif
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return (0);
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}
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/*
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* This is just an brute force interrupt handler. It just calls all the
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* registered handlers sequencially.
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*
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* Later on we should maybe have a different handler for boards that can
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* tell us which device generated the interrupt.
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*/
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static void
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puc_intr(void *arg)
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{
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int i;
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struct puc_softc *sc;
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sc = (struct puc_softc *)arg;
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for (i = 0; i < PUC_MAX_PORTS; i++)
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if (sc->sc_ports[i].ihand != NULL)
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(sc->sc_ports[i].ihand)(sc->sc_ports[i].ihandarg);
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}
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const struct puc_device_description *
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puc_find_description(uint32_t vend, uint32_t prod, uint32_t svend,
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uint32_t sprod)
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{
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int i;
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#define checkreg(val, index) \
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(((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)])
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for (i = 0; puc_devices[i].name != NULL; i++) {
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if (checkreg(vend, PUC_REG_VEND) &&
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checkreg(prod, PUC_REG_PROD) &&
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checkreg(svend, PUC_REG_SVEND) &&
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checkreg(sprod, PUC_REG_SPROD))
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return (&puc_devices[i]);
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}
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#undef checkreg
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return (NULL);
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}
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static int
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puc_find_free_unit(char *name)
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{
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devclass_t dc;
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int start;
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int unit;
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unit = 0;
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start = 0;
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while (resource_int_value(name, unit, "port", &start) == 0 &&
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start > 0)
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unit++;
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dc = devclass_find(name);
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if (dc == NULL)
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return (-1);
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while (devclass_get_device(dc, unit))
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unit++;
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#ifdef PUC_DEBUG
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printf("puc: Using %s%d\n", name, unit);
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#endif
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return (unit);
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}
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#ifdef PUC_DEBUG
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static void
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puc_print_resource_list(struct resource_list *rl)
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{
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#if 0
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struct resource_list_entry *rle;
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printf("print_resource_list: rl %p\n", rl);
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SLIST_FOREACH(rle, rl, link)
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printf(" type %x, rid %x start %x end %x count %x\n",
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rle->type, rle->rid, rle->start, rle->end, rle->count);
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printf("print_resource_list: end.\n");
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#endif
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}
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#endif
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struct resource *
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puc_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct puc_device *pdev;
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struct resource *retval;
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struct resource_list *rl;
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struct resource_list_entry *rle;
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pdev = device_get_ivars(child);
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rl = &pdev->resources;
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#ifdef PUC_DEBUG
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printf("puc_alloc_resource: pdev %p, looking for t %x, r %x\n",
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pdev, type, *rid);
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puc_print_resource_list(rl);
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#endif
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retval = NULL;
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rle = resource_list_find(rl, type, *rid);
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if (rle) {
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start = rle->start;
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end = rle->end;
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count = rle->count;
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#ifdef PUC_DEBUG
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printf("found rle, %lx, %lx, %lx\n", start, end, count);
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#endif
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retval = rle->res;
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} else
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printf("oops rle is gone\n");
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return (retval);
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}
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int
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puc_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *res)
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{
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return (0);
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}
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int
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puc_get_resource(device_t dev, device_t child, int type, int rid,
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u_long *startp, u_long *countp)
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{
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struct puc_device *pdev;
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struct resource_list *rl;
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struct resource_list_entry *rle;
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pdev = device_get_ivars(child);
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rl = &pdev->resources;
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#ifdef PUC_DEBUG
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printf("puc_get_resource: pdev %p, looking for t %x, r %x\n", pdev,
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type, rid);
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puc_print_resource_list(rl);
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#endif
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rle = resource_list_find(rl, type, rid);
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if (rle) {
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#ifdef PUC_DEBUG
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printf("found rle %p,", rle);
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#endif
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if (startp != NULL)
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*startp = rle->start;
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if (countp != NULL)
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*countp = rle->count;
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#ifdef PUC_DEBUG
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printf(" %lx, %lx\n", rle->start, rle->count);
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#endif
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return (0);
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} else
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printf("oops rle is gone\n");
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return (ENXIO);
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}
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int
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puc_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
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void (*ihand)(void *), void *arg, void **cookiep)
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{
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int i;
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struct puc_softc *sc;
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sc = (struct puc_softc *)device_get_softc(dev);
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if ((flags & INTR_FAST) != sc->fastintr)
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return (ENXIO);
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
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if (sc->sc_ports[i].dev == child) {
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if (sc->sc_ports[i].ihand != 0)
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return (ENXIO);
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sc->sc_ports[i].ihand = ihand;
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sc->sc_ports[i].ihandarg = arg;
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*cookiep = arg;
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return (0);
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}
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}
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return (ENXIO);
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}
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int
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puc_teardown_intr(device_t dev, device_t child, struct resource *r,
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void *cookie)
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{
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int i;
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struct puc_softc *sc;
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sc = (struct puc_softc *)device_get_softc(dev);
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
|
|
if (sc->sc_ports[i].dev == child) {
|
|
sc->sc_ports[i].ihand = NULL;
|
|
sc->sc_ports[i].ihandarg = NULL;
|
|
return (0);
|
|
}
|
|
}
|
|
return (ENXIO);
|
|
}
|
|
|
|
int
|
|
puc_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
|
|
{
|
|
struct puc_device *pdev;
|
|
|
|
pdev = device_get_ivars(child);
|
|
if (pdev == NULL)
|
|
return (ENOENT);
|
|
|
|
switch(index) {
|
|
case PUC_IVAR_FREQ:
|
|
*result = pdev->serialfreq;
|
|
break;
|
|
default:
|
|
return (ENOENT);
|
|
}
|
|
return (0);
|
|
}
|