348 lines
8.4 KiB
C
348 lines
8.4 KiB
C
/* $NetBSD: pcmcom.c,v 1.40 2012/10/27 17:18:37 chs Exp $ */
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/*-
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* Copyright (c) 1998, 2000, 2004 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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*
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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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pcmcom.c,v 1.40 2012/10/27 17:18:37 chs Exp $");
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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 <sys/bus.h>
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#include <sys/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_softc {
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device_t 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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#define NSLAVES 8
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device_t sc_slaves[NSLAVES]; /* slave info */
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int sc_nslaves; /* slave count */
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int sc_state;
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#define PCMCOM_ATTACHED 3
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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(device_t, cfdata_t, void *);
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int pcmcom_validate_config(struct pcmcia_config_entry *);
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void pcmcom_attach(device_t, device_t, void *);
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int pcmcom_detach(device_t, int);
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void pcmcom_childdet(device_t, device_t);
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CFATTACH_DECL_NEW(pcmcom, sizeof(struct pcmcom_softc),
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pcmcom_match, pcmcom_attach, pcmcom_detach, NULL);
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const struct pcmcia_product pcmcom_products[] = {
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{ PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232,
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PCMCIA_CIS_INVALID },
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#if 0 /* does not work */
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{ PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232_A,
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PCMCIA_CIS_INVALID },
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#endif
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};
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const size_t pcmcom_nproducts = __arraycount(pcmcom_products);
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int pcmcom_print(void *, const char *);
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int pcmcom_enable(struct pcmcom_softc *);
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void pcmcom_disable(struct pcmcom_softc *);
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int pcmcom_intr(void *);
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int
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pcmcom_match(device_t parent, cfdata_t cf, 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, pcmcom_products, pcmcom_nproducts,
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sizeof(pcmcom_products[0]), NULL))
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return (2); /* beat com_pcmcia */
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return (0);
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}
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int
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pcmcom_validate_config(struct pcmcia_config_entry *cfe)
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{
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if (cfe->iftype != PCMCIA_IFTYPE_IO ||
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cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES)
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return (EINVAL);
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return (0);
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}
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void
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pcmcom_attach(device_t parent, device_t self, void *aux)
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{
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struct pcmcom_softc *sc = device_private(self);
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struct pcmcia_attach_args *pa = aux;
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struct pcmcia_config_entry *cfe;
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int slave;
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int error;
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int locs[PCMCOMCF_NLOCS];
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sc->sc_dev = self;
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sc->sc_pf = pa->pf;
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error = pcmcia_function_configure(pa->pf, pcmcom_validate_config);
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if (error) {
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aprint_error_dev(self, "configure failed, error=%d\n", error);
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return;
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}
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cfe = pa->pf->cfe;
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sc->sc_nslaves = cfe->num_iospace;
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error = pcmcom_enable(sc);
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if (error)
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goto fail;
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/* Attach the children. */
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for (slave = 0; slave < sc->sc_nslaves; slave++) {
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struct pcmcom_attach_args pca;
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printf("%s: slave %d\n", device_xname(self), slave);
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pca.pca_iot = cfe->iospace[slave].handle.iot;
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pca.pca_ioh = cfe->iospace[slave].handle.ioh;
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pca.pca_slave = slave;
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locs[PCMCOMCF_SLAVE] = slave;
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sc->sc_slaves[slave] = config_found_sm_loc(sc->sc_dev,
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"pcmcom", locs,
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&pca, pcmcom_print, config_stdsubmatch);
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}
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pcmcom_disable(sc);
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sc->sc_state = PCMCOM_ATTACHED;
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return;
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fail:
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pcmcia_function_unconfigure(pa->pf);
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}
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void
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pcmcom_childdet(device_t self, device_t child)
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{
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struct pcmcom_softc *sc = device_private(self);
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int slave;
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for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
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if (sc->sc_slaves[slave] == child)
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sc->sc_slaves[slave] = NULL;
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}
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}
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int
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pcmcom_detach(device_t self, int flags)
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{
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struct pcmcom_softc *sc = device_private(self);
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int slave, error;
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if (sc->sc_state != PCMCOM_ATTACHED)
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return (0);
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for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
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if (sc->sc_slaves[slave]) {
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/* Detach the child. */
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error = config_detach(sc->sc_slaves[slave], flags);
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if (error)
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return (error);
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}
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}
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pcmcia_function_unconfigure(sc->sc_pf);
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return (0);
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}
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int
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pcmcom_print(void *aux, 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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aprint_normal("com at %s", pnp);
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aprint_normal(" 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_intr(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])
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rval |= comintr(sc->sc_slaves[i]);
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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(struct pcmcom_softc *sc)
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{
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int error;
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if (sc->sc_enabled_count++ != 0)
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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)
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return (EIO);
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error = pcmcia_function_enable(sc->sc_pf);
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if (error) {
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pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
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sc->sc_ih = 0;
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}
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return (error);
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}
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void
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pcmcom_disable(struct pcmcom_softc *sc)
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{
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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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sc->sc_ih = 0;
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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(device_t, cfdata_t , void *);
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void com_pcmcom_attach(device_t, device_t, void *);
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/* No pcmcom-specific goo in the softc; it's all in the parent. */
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CFATTACH_DECL_NEW(com_pcmcom, sizeof(struct com_softc),
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com_pcmcom_match, com_pcmcom_attach, com_detach, NULL);
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int com_pcmcom_enable(struct com_softc *);
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void com_pcmcom_disable(struct com_softc *);
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int
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com_pcmcom_match(device_t parent, cfdata_t cf, 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(device_t parent, device_t self, void *aux)
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{
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struct com_softc *sc = device_private(self);
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struct pcmcom_attach_args *pca = aux;
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sc->sc_dev = self;
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COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1);
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sc->enabled = 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(struct com_softc *sc)
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{
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return pcmcom_enable(device_private(device_parent(sc->sc_dev)));
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}
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void
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com_pcmcom_disable(struct com_softc *sc)
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{
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pcmcom_disable(device_private(device_parent(sc->sc_dev)));
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}
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#endif /* NCOM_PCMCOM > 0 */
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