617 lines
16 KiB
C
617 lines
16 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, 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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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#define __RMAN_RESOURCE_VISIBLE /* Shouldn't be there */
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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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int port;
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int regshft;
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u_int serialfreq;
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u_int subtype;
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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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static int
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puc_probe_ilr(struct puc_softc *sc, struct resource *res)
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{
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u_char t1, t2;
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int i;
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switch (sc->sc_desc.ilr_type) {
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case PUC_ILR_TYPE_DIGI:
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sc->ilr_st = rman_get_bustag(res);
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sc->ilr_sh = rman_get_bushandle(res);
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for (i = 0; i < 2 && sc->sc_desc.ilr_offset[i] != 0; i++) {
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t1 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
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sc->sc_desc.ilr_offset[i]);
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t1 = ~t1;
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bus_space_write_1(sc->ilr_st, sc->ilr_sh,
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sc->sc_desc.ilr_offset[i], t1);
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t2 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
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sc->sc_desc.ilr_offset[i]);
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if (t2 == t1)
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return (0);
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}
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return (1);
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default:
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break;
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}
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return (0);
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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, ressz, rid, type;
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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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bus_space_handle_t bh;
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if (desc == NULL)
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return (ENXIO);
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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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#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_any(dev, SYS_RES_IRQ, &rid,
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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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type = (sc->sc_desc.ports[i].flags & PUC_FLAGS_MEMORY)
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? SYS_RES_MEMORY : SYS_RES_IOPORT;
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res = bus_alloc_resource_any(dev, type, &rid,
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RF_ACTIVE);
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if (res == NULL &&
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sc->sc_desc.ports[i].flags & PUC_FLAGS_ALTRES) {
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type = (type == SYS_RES_IOPORT)
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? SYS_RES_MEMORY : SYS_RES_IOPORT;
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res = bus_alloc_resource_any(dev, type, &rid,
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RF_ACTIVE);
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}
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if (res == NULL) {
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device_printf(dev, "could not get resource\n");
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continue;
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}
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sc->sc_bar_mappings[bidx].type = type;
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sc->sc_bar_mappings[bidx].res = res;
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if (sc->sc_desc.ilr_type != PUC_ILR_TYPE_NONE) {
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sc->ilr_enabled = puc_probe_ilr(sc, res);
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if (sc->ilr_enabled)
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device_printf(dev, "ILR enabled\n");
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else
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device_printf(dev, "ILR disabled\n");
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}
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#ifdef PUC_DEBUG
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printf("%s rid %d bst %lx, start %lx, end %lx\n",
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(type == SYS_RES_MEMORY) ? "memory" : "port", rid,
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(u_long)rman_get_bustag(res), (u_long)rman_get_start(res),
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(u_long)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 & ~PUC_PORT_SUBTYPE_MASK) {
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case PUC_PORT_TYPE_COM:
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typestr = "sio";
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break;
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case PUC_PORT_TYPE_LPT:
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typestr = "ppc";
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break;
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case PUC_PORT_TYPE_UART:
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typestr = "uart";
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break;
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default:
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continue;
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}
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switch (sc->sc_desc.ports[i].type & PUC_PORT_SUBTYPE_MASK) {
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case PUC_PORT_UART_SAB82532:
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ressz = 64;
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break;
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case PUC_PORT_UART_Z8530:
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ressz = 2;
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break;
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default:
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ressz = 8;
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break;
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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 or MEMORY resource */
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res = sc->sc_bar_mappings[bidx].res;
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type = sc->sc_bar_mappings[bidx].type;
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resource_list_add(&pdev->resources, type, 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
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+ ressz - 1, ressz);
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rle = resource_list_find(&pdev->resources, type, 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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rman_set_start(rle->res, rman_get_start(res) +
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sc->sc_desc.ports[i].offset);
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rman_set_end(rle->res, rman_get_start(rle->res) +
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ressz - 1);
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rman_set_bustag(rle->res, rman_get_bustag(res));
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bus_space_subregion(rman_get_bustag(rle->res),
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rman_get_bushandle(res),
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sc->sc_desc.ports[i].offset, ressz,
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&bh);
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rman_set_bushandle(rle->res, bh);
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}
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pdev->port = i + 1;
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pdev->serialfreq = sc->sc_desc.ports[i].serialfreq;
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pdev->subtype = sc->sc_desc.ports[i].type &
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PUC_PORT_SUBTYPE_MASK;
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pdev->regshft = sc->sc_desc.ports[i].regshft;
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childunit = puc_find_free_unit(typestr);
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if (childunit < 0 && strcmp(typestr, "uart") != 0) {
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typestr = "uart";
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childunit = puc_find_free_unit(typestr);
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}
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sc->sc_ports[i].dev = device_add_child(dev, typestr,
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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), ressz);
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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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#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), ressz);
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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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static u_int32_t
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puc_ilr_read(struct puc_softc *sc)
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{
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u_int32_t mask;
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int i;
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mask = 0;
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switch (sc->sc_desc.ilr_type) {
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case PUC_ILR_TYPE_DIGI:
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for (i = 1; i >= 0 && sc->sc_desc.ilr_offset[i] != 0; i--) {
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mask = (mask << 8) | (bus_space_read_1(sc->ilr_st,
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sc->ilr_sh, sc->sc_desc.ilr_offset[i]) & 0xff);
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}
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break;
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default:
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mask = 0xffffffff;
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break;
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}
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return (mask);
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}
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/*
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* This is an interrupt handler. For boards that can't tell us which
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* device generated the interrupt it just calls all the registered
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* handlers sequencially, but for boards that can tell us which
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* device(s) generated the interrupt it calls only handlers for devices
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* that actually 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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u_int32_t ilr_mask;
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struct puc_softc *sc;
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sc = (struct puc_softc *)arg;
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ilr_mask = sc->ilr_enabled ? puc_ilr_read(sc) : 0xffffffff;
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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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((ilr_mask >> i) & 0x00000001))
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(sc->sc_ports[i].ihand)(sc->sc_ports[i].ihandarg);
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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 %lx end %lx count %lx\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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device_t my_child;
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/*
|
|
* in the case of a child of child we need to find our immediate child
|
|
*/
|
|
for (my_child = child; device_get_parent(my_child) != dev;
|
|
my_child = device_get_parent(my_child));
|
|
|
|
pdev = device_get_ivars(my_child);
|
|
rl = &pdev->resources;
|
|
|
|
#ifdef PUC_DEBUG
|
|
printf("puc_alloc_resource: pdev %p, looking for t %x, r %x\n",
|
|
pdev, type, *rid);
|
|
puc_print_resource_list(rl);
|
|
#endif
|
|
retval = NULL;
|
|
rle = resource_list_find(rl, type, *rid);
|
|
if (rle) {
|
|
#ifdef PUC_DEBUG
|
|
printf("found rle, %lx, %lx, %lx\n", rle->start, rle->end,
|
|
rle->count);
|
|
#endif
|
|
retval = rle->res;
|
|
}
|
|
#ifdef PUC_DEBUG
|
|
else
|
|
printf("oops rle is gone\n");
|
|
#endif
|
|
|
|
return (retval);
|
|
}
|
|
|
|
int
|
|
puc_release_resource(device_t dev, device_t child, int type, int rid,
|
|
struct resource *res)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
puc_get_resource(device_t dev, device_t child, int type, int rid,
|
|
u_long *startp, u_long *countp)
|
|
{
|
|
struct puc_device *pdev;
|
|
struct resource_list *rl;
|
|
struct resource_list_entry *rle;
|
|
|
|
pdev = device_get_ivars(child);
|
|
rl = &pdev->resources;
|
|
|
|
#ifdef PUC_DEBUG
|
|
printf("puc_get_resource: pdev %p, looking for t %x, r %x\n", pdev,
|
|
type, rid);
|
|
puc_print_resource_list(rl);
|
|
#endif
|
|
rle = resource_list_find(rl, type, rid);
|
|
if (rle) {
|
|
#ifdef PUC_DEBUG
|
|
printf("found rle %p,", rle);
|
|
#endif
|
|
if (startp != NULL)
|
|
*startp = rle->start;
|
|
if (countp != NULL)
|
|
*countp = rle->count;
|
|
#ifdef PUC_DEBUG
|
|
printf(" %lx, %lx\n", rle->start, rle->count);
|
|
#endif
|
|
return (0);
|
|
} else
|
|
printf("oops rle is gone\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
int
|
|
puc_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
|
|
void (*ihand)(void *), void *arg, void **cookiep)
|
|
{
|
|
int i;
|
|
struct puc_softc *sc;
|
|
|
|
sc = (struct puc_softc *)device_get_softc(dev);
|
|
if ((flags & INTR_FAST) != sc->fastintr)
|
|
return (ENXIO);
|
|
for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
|
|
if (sc->sc_ports[i].dev == child) {
|
|
if (sc->sc_ports[i].ihand != 0)
|
|
return (ENXIO);
|
|
sc->sc_ports[i].ihand = ihand;
|
|
sc->sc_ports[i].ihandarg = arg;
|
|
*cookiep = arg;
|
|
return (0);
|
|
}
|
|
}
|
|
return (ENXIO);
|
|
}
|
|
|
|
int
|
|
puc_teardown_intr(device_t dev, device_t child, struct resource *r,
|
|
void *cookie)
|
|
{
|
|
int i;
|
|
struct puc_softc *sc;
|
|
|
|
sc = (struct puc_softc *)device_get_softc(dev);
|
|
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;
|
|
case PUC_IVAR_PORT:
|
|
*result = pdev->port;
|
|
break;
|
|
case PUC_IVAR_REGSHFT:
|
|
*result = pdev->regshft;
|
|
break;
|
|
case PUC_IVAR_SUBTYPE:
|
|
*result = pdev->subtype;
|
|
break;
|
|
default:
|
|
return (ENOENT);
|
|
}
|
|
return (0);
|
|
}
|