NetBSD/sys/dev/pcmcia/pcmcom.c

492 lines
12 KiB
C

/* $NetBSD: pcmcom.c,v 1.5 2000/02/04 01:27:14 cgd Exp $ */
/*-
* Copyright (c) 1998, 2000 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/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_slave_info {
struct pcmcia_io_handle psi_pcioh; /* PCMCIA i/o space info */
int psi_io_window; /* our i/o window */
struct device *psi_child; /* child's device */
};
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 */
struct pcmcom_slave_info *sc_slaves; /* slave info */
int sc_nslaves; /* slave count */
};
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 __P((struct device *, struct cfdata *, void *));
void pcmcom_attach __P((struct device *, struct device *, void *));
int pcmcom_detach __P((struct device *, int));
int pcmcom_activate __P((struct device *, enum devact));
struct cfattach pcmcom_ca = {
sizeof(struct pcmcom_softc), pcmcom_match, pcmcom_attach,
pcmcom_detach, pcmcom_activate
};
const struct pcmcom_product {
struct pcmcia_product pp_product;
int pp_nslaves; /* number of slaves */
} pcmcom_products[] = {
{ { PCMCIA_STR_SOCKET_DUAL_RS232, PCMCIA_VENDOR_SOCKET,
PCMCIA_PRODUCT_SOCKET_DUAL_RS232, 0 },
2 },
{ { NULL } }
};
int pcmcom_print __P((void *, const char *));
int pcmcom_submatch __P((struct device *, struct cfdata *, void *));
int pcmcom_check_cfe __P((struct pcmcom_softc *,
struct pcmcia_config_entry *));
void pcmcom_attach_slave __P((struct pcmcom_softc *, int));
int pcmcom_enable __P((struct pcmcom_softc *));
void pcmcom_disable __P((struct pcmcom_softc *));
int pcmcom_intr __P((void *));
int
pcmcom_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct pcmcia_attach_args *pa = aux;
if (pcmcia_product_lookup(pa,
(const struct pcmcia_product *)pcmcom_products,
sizeof pcmcom_products[0], NULL) != NULL)
return (10); /* beat com_pcmcia */
return (0);
}
void
pcmcom_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
struct pcmcia_attach_args *pa = aux;
struct pcmcia_config_entry *cfe;
const struct pcmcom_product *pp;
size_t size;
int i;
sc->sc_pf = pa->pf;
pp = (const struct pcmcom_product *)pcmcia_product_lookup(pa,
(const struct pcmcia_product *)pcmcom_products,
sizeof pcmcom_products[0], NULL);
if (pp == NULL) {
printf("\n");
panic("pcmcom_attach: impossible");
}
printf(": %s\n", pp->pp_product.pp_name);
/* Allocate the slave info. */
sc->sc_nslaves = pp->pp_nslaves;
size = sizeof(struct pcmcom_slave_info) * sc->sc_nslaves;
sc->sc_slaves = malloc(size, M_DEVBUF, M_NOWAIT);
if (sc->sc_slaves == NULL) {
printf("%s: unable to allocate slave info\n",
sc->sc_dev.dv_xname);
return;
}
memset(sc->sc_slaves, 0, size);
/*
* The address decoders on these cards are stupid. They decode
* (usually) 10 bits of address, so you need to allocate the
* regions they request in order for the card to differentiate
* between serial ports.
*/
for (cfe = pa->pf->cfe_head.sqh_first; cfe != NULL;
cfe = cfe->cfe_list.sqe_next) {
if (pcmcom_check_cfe(sc, cfe)) {
/* Found one! */
break;
}
}
if (cfe == NULL) {
printf("%s: unable to find a suitable config table entry\n",
sc->sc_dev.dv_xname);
return;
}
/* Enable the card. */
pcmcia_function_init(pa->pf, cfe);
if (pcmcia_function_enable(sc->sc_pf)) {
printf("%s: function enable failed\n", sc->sc_dev.dv_xname);
return;
}
sc->sc_enabled_count = 1;
/* Attach the children. */
for (i = 0; i < sc->sc_nslaves; i++)
pcmcom_attach_slave(sc, i);
sc->sc_enabled_count = 0;
pcmcia_function_disable(sc->sc_pf);
}
int
pcmcom_check_cfe(sc, cfe)
struct pcmcom_softc *sc;
struct pcmcia_config_entry *cfe;
{
struct pcmcom_slave_info *psi;
int slave;
/* We need to have the same number of I/O spaces as we do slaves. */
if (cfe->num_iospace != sc->sc_nslaves)
return (0);
for (slave = 0; slave < sc->sc_nslaves; slave++) {
psi = &sc->sc_slaves[slave];
if (pcmcia_io_alloc(sc->sc_pf,
cfe->iospace[slave].start,
cfe->iospace[slave].length,
cfe->iospace[slave].length,
&psi->psi_pcioh))
goto release;
}
/* If we got here, we were able to allocate space for all slaves! */
return (1);
release:
/* Release the i/o spaces we've allocated. */
for (slave--; slave >= 0; slave--) {
psi = &sc->sc_slaves[slave];
pcmcia_io_free(sc->sc_pf, &psi->psi_pcioh);
}
return (0);
}
void
pcmcom_attach_slave(sc, slave)
struct pcmcom_softc *sc;
int slave;
{
struct pcmcom_slave_info *psi = &sc->sc_slaves[slave];
struct pcmcom_attach_args pca;
printf("%s: slave %d", sc->sc_dev.dv_xname, slave);
if (pcmcia_io_map(sc->sc_pf, PCMCIA_WIDTH_IO8, 0, psi->psi_pcioh.size,
&psi->psi_pcioh, &psi->psi_io_window)) {
printf(": can't map i/o space\n");
return;
}
printf("\n");
pca.pca_iot = psi->psi_pcioh.iot;
pca.pca_ioh = psi->psi_pcioh.ioh;
pca.pca_slave = slave;
psi->psi_child = config_found_sm(&sc->sc_dev, &pca, pcmcom_print,
pcmcom_submatch);
}
int
pcmcom_detach(self, flags)
struct device *self;
int flags;
{
struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
struct pcmcom_slave_info *psi;
int slave, error;
for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) {
psi = &sc->sc_slaves[slave];
if (psi->psi_child == NULL)
continue;
/* Detach the child. */
if ((error = config_detach(self, flags)) != 0)
return (error);
psi->psi_child = NULL;
/* Unmap the i/o window. */
pcmcia_io_unmap(sc->sc_pf, psi->psi_io_window);
/* Free the i/o space. */
pcmcia_io_free(sc->sc_pf, &psi->psi_pcioh);
}
return (0);
}
int
pcmcom_activate(self, act)
struct device *self;
enum devact act;
{
struct pcmcom_softc *sc = (struct pcmcom_softc *)self;
struct pcmcom_slave_info *psi;
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--) {
psi = &sc->sc_slaves[slave];
if (psi->psi_child == NULL)
continue;
/*
* Deactivate the child. Doing so will cause our
* own enabled count to drop to 0, once all children
* are deactivated.
*/
if ((error = config_deactivate(psi->psi_child)) != 0)
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)
printf("com at %s", pnp);
printf(" slave %d", pca->pca_slave);
return (UNCONF);
}
int
pcmcom_submatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct pcmcom_attach_args *pca = aux;
if (cf->cf_loc[PCMCOMCF_SLAVE] != pca->pca_slave &&
cf->cf_loc[PCMCOMCF_SLAVE] != PCMCOMCF_SLAVE_DEFAULT)
return (0);
return ((*cf->cf_attach->ca_match)(parent, cf, aux));
}
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].psi_child != NULL)
rval |= comintr(sc->sc_slaves[i].psi_child);
}
return (rval);
#else
return (0);
#endif /* NCOM > 0 */
}
int
pcmcom_enable(sc)
struct pcmcom_softc *sc;
{
sc->sc_enabled_count++;
if (sc->sc_enabled_count > 1)
return (0);
/* Establish the interrupt. */
sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL,
pcmcom_intr, sc);
if (sc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt\n",
sc->sc_dev.dv_xname);
return (1);
}
return (pcmcia_function_enable(sc->sc_pf));
}
void
pcmcom_disable(sc)
struct pcmcom_softc *sc;
{
sc->sc_enabled_count--;
if (sc->sc_enabled_count != 0)
return;
pcmcia_function_disable(sc->sc_pf);
pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
}
/****** Here begins the com attachment code. ******/
#if NCOM_PCMCOM > 0
int com_pcmcom_match __P((struct device *, struct cfdata *, void *));
void com_pcmcom_attach __P((struct device *, struct device *, void *));
/* No pcmcom-specific goo in the softc; it's all in the parent. */
struct cfattach com_pcmcom_ca = {
sizeof(struct com_softc), com_pcmcom_match, com_pcmcom_attach,
com_detach, com_activate
};
int com_pcmcom_enable __P((struct com_softc *));
void com_pcmcom_disable __P((struct com_softc *));
int
com_pcmcom_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
/* Device is always present. */
return (1);
}
void
com_pcmcom_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_softc *sc = (struct com_softc *)self;
struct pcmcom_attach_args *pca = aux;
sc->sc_iot = pca->pca_iot;
sc->sc_ioh = pca->pca_ioh;
sc->enabled = 1;
sc->sc_iobase = -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(sc)
struct com_softc *sc;
{
return (pcmcom_enable((struct pcmcom_softc *)sc->sc_dev.dv_parent));
}
void
com_pcmcom_disable(sc)
struct com_softc *sc;
{
pcmcom_disable((struct pcmcom_softc *)sc->sc_dev.dv_parent);
}
#endif /* NCOM_PCMCOM > 0 */