492 lines
12 KiB
C
492 lines
12 KiB
C
/* $NetBSD: pcmcom.c,v 1.5 2000/02/04 01:27:14 cgd Exp $ */
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/*-
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* Copyright (c) 1998, 2000 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 RedBack Networks, Inc.
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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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* Device driver for multi-port PCMCIA serial cards, written by
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* Jason R. Thorpe for RedBack Networks, Inc.
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*
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* Most of these cards are simply multiple UARTs sharing a single interrupt
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* line, and rely on the fact that PCMCIA level-triggered interrupts can
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* be shared. There are no special interrupt registers on them, as there
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* are on most ISA multi-port serial cards.
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*
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* If there are other cards that have interrupt registers, they should not
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* be glued into this driver. Rather, separate drivers should be written
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* for those devices, as we have in the ISA multi-port serial card case.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/termios.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <dev/pcmcia/pcmciavar.h>
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#include <dev/pcmcia/pcmciareg.h>
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#include <dev/pcmcia/pcmciadevs.h>
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#include "com.h"
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#include "pcmcom.h"
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#include "locators.h"
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struct pcmcom_slave_info {
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struct pcmcia_io_handle psi_pcioh; /* PCMCIA i/o space info */
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int psi_io_window; /* our i/o window */
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struct device *psi_child; /* child's device */
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};
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struct pcmcom_softc {
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struct device sc_dev; /* generic device glue */
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struct pcmcia_function *sc_pf; /* our PCMCIA function */
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void *sc_ih; /* interrupt handle */
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int sc_enabled_count; /* enabled count */
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struct pcmcom_slave_info *sc_slaves; /* slave info */
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int sc_nslaves; /* slave count */
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};
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struct pcmcom_attach_args {
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bus_space_tag_t pca_iot; /* I/O tag */
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bus_space_handle_t pca_ioh; /* I/O handle */
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int pca_slave; /* slave # */
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};
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int pcmcom_match __P((struct device *, struct cfdata *, void *));
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void pcmcom_attach __P((struct device *, struct device *, void *));
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int pcmcom_detach __P((struct device *, int));
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int pcmcom_activate __P((struct device *, enum devact));
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struct cfattach pcmcom_ca = {
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sizeof(struct pcmcom_softc), pcmcom_match, pcmcom_attach,
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pcmcom_detach, pcmcom_activate
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};
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const struct pcmcom_product {
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struct pcmcia_product pp_product;
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int pp_nslaves; /* number of slaves */
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} pcmcom_products[] = {
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{ { PCMCIA_STR_SOCKET_DUAL_RS232, PCMCIA_VENDOR_SOCKET,
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PCMCIA_PRODUCT_SOCKET_DUAL_RS232, 0 },
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2 },
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{ { NULL } }
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};
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int pcmcom_print __P((void *, const char *));
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int pcmcom_submatch __P((struct device *, struct cfdata *, void *));
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int pcmcom_check_cfe __P((struct pcmcom_softc *,
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struct pcmcia_config_entry *));
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void pcmcom_attach_slave __P((struct pcmcom_softc *, int));
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int pcmcom_enable __P((struct pcmcom_softc *));
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void pcmcom_disable __P((struct pcmcom_softc *));
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int pcmcom_intr __P((void *));
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int
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pcmcom_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct pcmcia_attach_args *pa = aux;
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if (pcmcia_product_lookup(pa,
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(const struct pcmcia_product *)pcmcom_products,
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sizeof pcmcom_products[0], NULL) != NULL)
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return (10); /* beat com_pcmcia */
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return (0);
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}
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void
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pcmcom_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
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struct pcmcia_attach_args *pa = aux;
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struct pcmcia_config_entry *cfe;
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const struct pcmcom_product *pp;
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size_t size;
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int i;
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sc->sc_pf = pa->pf;
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pp = (const struct pcmcom_product *)pcmcia_product_lookup(pa,
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(const struct pcmcia_product *)pcmcom_products,
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sizeof pcmcom_products[0], NULL);
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if (pp == NULL) {
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printf("\n");
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panic("pcmcom_attach: impossible");
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}
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printf(": %s\n", pp->pp_product.pp_name);
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/* Allocate the slave info. */
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sc->sc_nslaves = pp->pp_nslaves;
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size = sizeof(struct pcmcom_slave_info) * sc->sc_nslaves;
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sc->sc_slaves = malloc(size, M_DEVBUF, M_NOWAIT);
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if (sc->sc_slaves == NULL) {
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printf("%s: unable to allocate slave info\n",
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sc->sc_dev.dv_xname);
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return;
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}
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memset(sc->sc_slaves, 0, size);
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/*
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* The address decoders on these cards are stupid. They decode
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* (usually) 10 bits of address, so you need to allocate the
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* regions they request in order for the card to differentiate
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* between serial ports.
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*/
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for (cfe = pa->pf->cfe_head.sqh_first; cfe != NULL;
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cfe = cfe->cfe_list.sqe_next) {
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if (pcmcom_check_cfe(sc, cfe)) {
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/* Found one! */
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break;
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}
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}
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if (cfe == NULL) {
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printf("%s: unable to find a suitable config table entry\n",
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sc->sc_dev.dv_xname);
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return;
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}
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/* Enable the card. */
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pcmcia_function_init(pa->pf, cfe);
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if (pcmcia_function_enable(sc->sc_pf)) {
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printf("%s: function enable failed\n", sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_enabled_count = 1;
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/* Attach the children. */
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for (i = 0; i < sc->sc_nslaves; i++)
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pcmcom_attach_slave(sc, i);
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sc->sc_enabled_count = 0;
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pcmcia_function_disable(sc->sc_pf);
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}
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int
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pcmcom_check_cfe(sc, cfe)
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struct pcmcom_softc *sc;
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struct pcmcia_config_entry *cfe;
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{
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struct pcmcom_slave_info *psi;
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int slave;
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/* We need to have the same number of I/O spaces as we do slaves. */
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if (cfe->num_iospace != sc->sc_nslaves)
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return (0);
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for (slave = 0; slave < sc->sc_nslaves; slave++) {
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psi = &sc->sc_slaves[slave];
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if (pcmcia_io_alloc(sc->sc_pf,
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cfe->iospace[slave].start,
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cfe->iospace[slave].length,
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cfe->iospace[slave].length,
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&psi->psi_pcioh))
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goto release;
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}
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/* If we got here, we were able to allocate space for all slaves! */
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return (1);
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release:
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/* Release the i/o spaces we've allocated. */
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for (slave--; slave >= 0; slave--) {
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psi = &sc->sc_slaves[slave];
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pcmcia_io_free(sc->sc_pf, &psi->psi_pcioh);
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}
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return (0);
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}
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void
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pcmcom_attach_slave(sc, slave)
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struct pcmcom_softc *sc;
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int slave;
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{
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struct pcmcom_slave_info *psi = &sc->sc_slaves[slave];
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struct pcmcom_attach_args pca;
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printf("%s: slave %d", sc->sc_dev.dv_xname, slave);
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if (pcmcia_io_map(sc->sc_pf, PCMCIA_WIDTH_IO8, 0, psi->psi_pcioh.size,
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&psi->psi_pcioh, &psi->psi_io_window)) {
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printf(": can't map i/o space\n");
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return;
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}
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printf("\n");
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pca.pca_iot = psi->psi_pcioh.iot;
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pca.pca_ioh = psi->psi_pcioh.ioh;
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pca.pca_slave = slave;
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psi->psi_child = config_found_sm(&sc->sc_dev, &pca, pcmcom_print,
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pcmcom_submatch);
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}
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int
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pcmcom_detach(self, flags)
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struct device *self;
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int flags;
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{
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struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
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struct pcmcom_slave_info *psi;
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int slave, error;
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for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
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psi = &sc->sc_slaves[slave];
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if (psi->psi_child == NULL)
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continue;
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/* Detach the child. */
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if ((error = config_detach(self, flags)) != 0)
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return (error);
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psi->psi_child = NULL;
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/* Unmap the i/o window. */
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pcmcia_io_unmap(sc->sc_pf, psi->psi_io_window);
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/* Free the i/o space. */
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pcmcia_io_free(sc->sc_pf, &psi->psi_pcioh);
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}
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return (0);
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}
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int
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pcmcom_activate(self, act)
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struct device *self;
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enum devact act;
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{
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struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
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struct pcmcom_slave_info *psi;
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int slave, error = 0, s;
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s = splserial();
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switch (act) {
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case DVACT_ACTIVATE:
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error = EOPNOTSUPP;
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break;
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case DVACT_DEACTIVATE:
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for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
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psi = &sc->sc_slaves[slave];
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if (psi->psi_child == NULL)
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continue;
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/*
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* Deactivate the child. Doing so will cause our
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* own enabled count to drop to 0, once all children
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* are deactivated.
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*/
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if ((error = config_deactivate(psi->psi_child)) != 0)
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break;
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}
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break;
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}
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splx(s);
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return (error);
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}
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int
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pcmcom_print(aux, pnp)
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void *aux;
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const char *pnp;
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{
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struct pcmcom_attach_args *pca = aux;
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/* only com's can attach to pcmcom's; easy... */
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if (pnp)
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printf("com at %s", pnp);
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printf(" slave %d", pca->pca_slave);
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return (UNCONF);
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}
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int
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pcmcom_submatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct pcmcom_attach_args *pca = aux;
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if (cf->cf_loc[PCMCOMCF_SLAVE] != pca->pca_slave &&
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cf->cf_loc[PCMCOMCF_SLAVE] != PCMCOMCF_SLAVE_DEFAULT)
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return (0);
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return ((*cf->cf_attach->ca_match)(parent, cf, aux));
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}
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int
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pcmcom_intr(arg)
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void *arg;
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{
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#if NCOM > 0
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struct pcmcom_softc *sc = arg;
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int i, rval = 0;
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if (sc->sc_enabled_count == 0)
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return (0);
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for (i = 0; i < sc->sc_nslaves; i++) {
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if (sc->sc_slaves[i].psi_child != NULL)
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rval |= comintr(sc->sc_slaves[i].psi_child);
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}
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return (rval);
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#else
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return (0);
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#endif /* NCOM > 0 */
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}
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int
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pcmcom_enable(sc)
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struct pcmcom_softc *sc;
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{
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sc->sc_enabled_count++;
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if (sc->sc_enabled_count > 1)
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return (0);
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/* Establish the interrupt. */
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sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL,
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pcmcom_intr, sc);
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if (sc->sc_ih == NULL) {
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printf("%s: couldn't establish interrupt\n",
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sc->sc_dev.dv_xname);
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return (1);
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}
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return (pcmcia_function_enable(sc->sc_pf));
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}
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void
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pcmcom_disable(sc)
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struct pcmcom_softc *sc;
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{
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sc->sc_enabled_count--;
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if (sc->sc_enabled_count != 0)
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return;
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pcmcia_function_disable(sc->sc_pf);
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pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
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}
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/****** Here begins the com attachment code. ******/
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#if NCOM_PCMCOM > 0
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int com_pcmcom_match __P((struct device *, struct cfdata *, void *));
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void com_pcmcom_attach __P((struct device *, struct device *, void *));
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/* No pcmcom-specific goo in the softc; it's all in the parent. */
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struct cfattach com_pcmcom_ca = {
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sizeof(struct com_softc), com_pcmcom_match, com_pcmcom_attach,
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com_detach, com_activate
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};
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int com_pcmcom_enable __P((struct com_softc *));
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void com_pcmcom_disable __P((struct com_softc *));
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int
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com_pcmcom_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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/* Device is always present. */
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return (1);
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}
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void
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com_pcmcom_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct com_softc *sc = (struct com_softc *)self;
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struct pcmcom_attach_args *pca = aux;
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sc->sc_iot = pca->pca_iot;
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sc->sc_ioh = pca->pca_ioh;
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sc->enabled = 1;
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sc->sc_iobase = -1;
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sc->sc_frequency = COM_FREQ;
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sc->enable = com_pcmcom_enable;
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sc->disable = com_pcmcom_disable;
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com_attach_subr(sc);
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sc->enabled = 0;
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}
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int
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com_pcmcom_enable(sc)
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struct com_softc *sc;
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{
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return (pcmcom_enable((struct pcmcom_softc *)sc->sc_dev.dv_parent));
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}
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void
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com_pcmcom_disable(sc)
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struct com_softc *sc;
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{
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pcmcom_disable((struct pcmcom_softc *)sc->sc_dev.dv_parent);
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}
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#endif /* NCOM_PCMCOM > 0 */
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