NetBSD/sys/dev/pcmcia/pcmcom.c

388 lines
9.4 KiB
C

/* $NetBSD: pcmcom.c,v 1.32 2008/03/14 15:09:11 cube Exp $ */
/*-
* Copyright (c) 1998, 2000, 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by RedBack Networks, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Device driver for multi-port PCMCIA serial cards, written by
* Jason R. Thorpe for RedBack Networks, Inc.
*
* Most of these cards are simply multiple UARTs sharing a single interrupt
* line, and rely on the fact that PCMCIA level-triggered interrupts can
* be shared. There are no special interrupt registers on them, as there
* are on most ISA multi-port serial cards.
*
* If there are other cards that have interrupt registers, they should not
* be glued into this driver. Rather, separate drivers should be written
* for those devices, as we have in the ISA multi-port serial card case.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcmcom.c,v 1.32 2008/03/14 15:09:11 cube Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/intr.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciadevs.h>
#include "com.h"
#include "pcmcom.h"
#include "locators.h"
struct pcmcom_softc {
struct device sc_dev; /* generic device glue */
struct pcmcia_function *sc_pf; /* our PCMCIA function */
void *sc_ih; /* interrupt handle */
int sc_enabled_count; /* enabled count */
#define NSLAVES 8
struct device *sc_slaves[NSLAVES]; /* slave info */
int sc_nslaves; /* slave count */
int sc_state;
#define PCMCOM_ATTACHED 3
};
struct pcmcom_attach_args {
bus_space_tag_t pca_iot; /* I/O tag */
bus_space_handle_t pca_ioh; /* I/O handle */
int pca_slave; /* slave # */
};
int pcmcom_match(struct device *, struct cfdata *, void *);
int pcmcom_validate_config(struct pcmcia_config_entry *);
void pcmcom_attach(struct device *, struct device *, void *);
int pcmcom_detach(struct device *, int);
int pcmcom_activate(struct device *, enum devact);
CFATTACH_DECL(pcmcom, sizeof(struct pcmcom_softc),
pcmcom_match, pcmcom_attach, pcmcom_detach, pcmcom_activate);
const struct pcmcia_product pcmcom_products[] = {
{ PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232,
PCMCIA_CIS_INVALID },
#if 0 /* does not work */
{ PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232_A,
PCMCIA_CIS_INVALID },
#endif
};
const size_t pcmcom_nproducts =
sizeof(pcmcom_products) / sizeof(pcmcom_products[0]);
int pcmcom_print(void *, const char *);
int pcmcom_enable(struct pcmcom_softc *);
void pcmcom_disable(struct pcmcom_softc *);
int pcmcom_intr(void *);
int
pcmcom_match(struct device *parent, struct cfdata *cf,
void *aux)
{
struct pcmcia_attach_args *pa = aux;
if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts,
sizeof(pcmcom_products[0]), NULL))
return (2); /* beat com_pcmcia */
return (0);
}
int
pcmcom_validate_config(cfe)
struct pcmcia_config_entry *cfe;
{
if (cfe->iftype != PCMCIA_IFTYPE_IO ||
cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES)
return (EINVAL);
return (0);
}
void
pcmcom_attach(struct device *parent, struct device *self, void *aux)
{
struct pcmcom_softc *sc = (void *)self;
struct pcmcia_attach_args *pa = aux;
struct pcmcia_config_entry *cfe;
int slave;
int error;
int locs[PCMCOMCF_NLOCS];
sc->sc_pf = pa->pf;
error = pcmcia_function_configure(pa->pf, pcmcom_validate_config);
if (error) {
aprint_error("%s: configure failed, error=%d\n", self->dv_xname,
error);
return;
}
cfe = pa->pf->cfe;
sc->sc_nslaves = cfe->num_iospace;
error = pcmcom_enable(sc);
if (error)
goto fail;
/* Attach the children. */
for (slave = 0; slave < sc->sc_nslaves; slave++) {
struct pcmcom_attach_args pca;
printf("%s: slave %d\n", self->dv_xname, slave);
pca.pca_iot = cfe->iospace[slave].handle.iot;
pca.pca_ioh = cfe->iospace[slave].handle.ioh;
pca.pca_slave = slave;
locs[PCMCOMCF_SLAVE] = slave;
sc->sc_slaves[slave] = config_found_sm_loc(&sc->sc_dev,
"pcmcom", locs,
&pca, pcmcom_print, config_stdsubmatch);
}
pcmcom_disable(sc);
sc->sc_state = PCMCOM_ATTACHED;
return;
fail:
pcmcia_function_unconfigure(pa->pf);
}
int
pcmcom_detach(self, flags)
struct device *self;
int flags;
{
struct pcmcom_softc *sc = (void *)self;
int slave, error;
if (sc->sc_state != PCMCOM_ATTACHED)
return (0);
for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
if (sc->sc_slaves[slave]) {
/* Detach the child. */
error = config_detach(sc->sc_slaves[slave], flags);
if (error)
return (error);
sc->sc_slaves[slave] = 0;
}
}
pcmcia_function_unconfigure(sc->sc_pf);
return (0);
}
int
pcmcom_activate(self, act)
struct device *self;
enum devact act;
{
struct pcmcom_softc *sc = (void *)self;
int slave, error = 0, s;
s = splserial();
switch (act) {
case DVACT_ACTIVATE:
error = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
if (sc->sc_slaves[slave]) {
/*
* Deactivate the child. Doing so will cause
* our own enabled count to drop to 0, once all
* children are deactivated.
*/
error = config_deactivate(sc->sc_slaves[slave]);
if (error)
break;
}
}
break;
}
splx(s);
return (error);
}
int
pcmcom_print(aux, pnp)
void *aux;
const char *pnp;
{
struct pcmcom_attach_args *pca = aux;
/* only com's can attach to pcmcom's; easy... */
if (pnp)
aprint_normal("com at %s", pnp);
aprint_normal(" slave %d", pca->pca_slave);
return (UNCONF);
}
int
pcmcom_intr(arg)
void *arg;
{
#if NCOM > 0
struct pcmcom_softc *sc = arg;
int i, rval = 0;
if (sc->sc_enabled_count == 0)
return (0);
for (i = 0; i < sc->sc_nslaves; i++) {
if (sc->sc_slaves[i])
rval |= comintr(sc->sc_slaves[i]);
}
return (rval);
#else
return (0);
#endif /* NCOM > 0 */
}
int
pcmcom_enable(sc)
struct pcmcom_softc *sc;
{
int error;
if (sc->sc_enabled_count++ != 0)
return (0);
/* Establish the interrupt. */
sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL,
pcmcom_intr, sc);
if (!sc->sc_ih)
return (EIO);
error = pcmcia_function_enable(sc->sc_pf);
if (error) {
pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
sc->sc_ih = 0;
}
return (error);
}
void
pcmcom_disable(sc)
struct pcmcom_softc *sc;
{
if (--sc->sc_enabled_count != 0)
return;
pcmcia_function_disable(sc->sc_pf);
pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
sc->sc_ih = 0;
}
/****** Here begins the com attachment code. ******/
#if NCOM_PCMCOM > 0
int com_pcmcom_match(device_t, cfdata_t , void *);
void com_pcmcom_attach(device_t, device_t, void *);
/* No pcmcom-specific goo in the softc; it's all in the parent. */
CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc),
com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate);
int com_pcmcom_enable(struct com_softc *);
void com_pcmcom_disable(struct com_softc *);
int
com_pcmcom_match(device_t parent, cfdata_t cf, void *aux)
{
/* Device is always present. */
return (1);
}
void
com_pcmcom_attach(device_t parent, device_t self, void *aux)
{
struct com_softc *sc = device_private(self);
struct pcmcom_attach_args *pca = aux;
sc->sc_dev = self;
COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1);
sc->enabled = 1;
sc->sc_frequency = COM_FREQ;
sc->enable = com_pcmcom_enable;
sc->disable = com_pcmcom_disable;
com_attach_subr(sc);
sc->enabled = 0;
}
int
com_pcmcom_enable(struct com_softc *sc)
{
return (pcmcom_enable(device_private(device_parent(sc->sc_dev))));
}
void
com_pcmcom_disable(sc)
struct com_softc *sc;
{
pcmcom_disable(device_private(device_parent(sc->sc_dev)));
}
#endif /* NCOM_PCMCOM > 0 */