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NetBSD/sys/dev/pcmcia/pcmcia.c
thorpej 0c3ca7b31e Finish implementing interrupt-driven card insertion and removal support. 
- Deactivate the card on removal and queue a REMOVAL event for the socket's
event thread to finish the detach.
- Queue an INSERTION event for the socket's event thread on insertion.

Implement a few missing infrastructure pieces to support this.

Hot swapping of PCMCIA cards now "works".  (Not quite; things like network
devices need changes for their respestive subsystems.  These changes are
coming soon...)
1998-11-17 08:49:11 +00:00

872 lines
21 KiB
C
Raw Blame History

/* $NetBSD: pcmcia.c,v 1.11 1998/11/17 08:49:12 thorpej Exp $ */
#define PCMCIADEBUG
/*
* Copyright (c) 1997 Marc Horowitz. All rights reserved.
*
* 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 Marc Horowitz.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include "opt_pcmciaverbose.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
/* XXX only needed for intr debugging */
#include <vm/vm.h>
#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciachip.h>
#include <dev/pcmcia/pcmciavar.h>
#include "locators.h"
#ifdef PCMCIADEBUG
int pcmcia_debug = 0;
#define DPRINTF(arg) if (pcmcia_debug) printf arg
#else
#define DPRINTF(arg)
#endif
#ifdef PCMCIAVERBOSE
int pcmcia_verbose = 1;
#else
int pcmcia_verbose = 0;
#endif
int pcmcia_match __P((struct device *, struct cfdata *, void *));
int pcmcia_submatch __P((struct device *, struct cfdata *, void *));
void pcmcia_attach __P((struct device *, struct device *, void *));
int pcmcia_print __P((void *, const char *));
static inline void pcmcia_socket_enable __P((pcmcia_chipset_tag_t,
pcmcia_chipset_handle_t *));
static inline void pcmcia_socket_disable __P((pcmcia_chipset_tag_t,
pcmcia_chipset_handle_t *));
int pcmcia_card_intr __P((void *));
struct cfattach pcmcia_ca = {
sizeof(struct pcmcia_softc), pcmcia_match, pcmcia_attach
};
int
pcmcia_ccr_read(pf, ccr)
struct pcmcia_function *pf;
int ccr;
{
return (bus_space_read_1(pf->pf_ccrt, pf->pf_ccrh,
pf->pf_ccr_offset + ccr));
}
void
pcmcia_ccr_write(pf, ccr, val)
struct pcmcia_function *pf;
int ccr;
int val;
{
if ((pf->ccr_mask) & (1 << (ccr / 2))) {
bus_space_write_1(pf->pf_ccrt, pf->pf_ccrh,
pf->pf_ccr_offset + ccr, val);
}
}
int
pcmcia_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
/* if the autoconfiguration got this far, there's a socket here */
return (1);
}
void
pcmcia_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pcmciabus_attach_args *paa = aux;
struct pcmcia_softc *sc = (struct pcmcia_softc *) self;
printf("\n");
sc->pct = paa->pct;
sc->pch = paa->pch;
sc->iobase = paa->iobase;
sc->iosize = paa->iosize;
sc->ih = NULL;
}
int
pcmcia_card_attach(dev)
struct device *dev;
{
struct pcmcia_softc *sc = (struct pcmcia_softc *) dev;
struct pcmcia_function *pf;
struct pcmcia_attach_args paa;
int attached;
/*
* this is here so that when socket_enable calls gettype, trt happens
*/
sc->card.pf_head.sqh_first = NULL;
pcmcia_chip_socket_enable(sc->pct, sc->pch);
pcmcia_read_cis(sc);
pcmcia_chip_socket_disable(sc->pct, sc->pch);
/*
* bail now if the card has no functions, or if there was an error in
* the cis.
*/
if (sc->card.error)
return (1);
if (sc->card.pf_head.sqh_first == NULL)
return (1);
if (pcmcia_verbose)
pcmcia_print_cis(sc);
attached = 0;
for (pf = sc->card.pf_head.sqh_first; pf != NULL;
pf = pf->pf_list.sqe_next) {
if (pf->cfe_head.sqh_first == NULL)
continue;
#ifdef DIAGNOSTIC
if (pf->child != NULL) {
printf("%s: %s still attached to function %d!\n",
sc->dev.dv_xname, pf->child->dv_xname,
pf->number);
panic("pcmcia_card_attach");
}
#endif
pf->sc = sc;
pf->child = NULL;
pf->cfe = NULL;
pf->ih_fct = NULL;
pf->ih_arg = NULL;
}
for (pf = sc->card.pf_head.sqh_first; pf != NULL;
pf = pf->pf_list.sqe_next) {
if (pf->cfe_head.sqh_first == NULL)
continue;
paa.manufacturer = sc->card.manufacturer;
paa.product = sc->card.product;
paa.card = &sc->card;
paa.pf = pf;
if ((pf->child = config_found_sm(&sc->dev, &paa, pcmcia_print,
pcmcia_submatch)) != NULL) {
attached++;
DPRINTF(("%s: function %d CCR at %d "
"offset %lx: %x %x %x %x, %x %x %x %x, %x\n",
sc->dev.dv_xname, pf->number,
pf->pf_ccr_window, pf->pf_ccr_offset,
pcmcia_ccr_read(pf, 0x00),
pcmcia_ccr_read(pf, 0x02), pcmcia_ccr_read(pf, 0x04),
pcmcia_ccr_read(pf, 0x06), pcmcia_ccr_read(pf, 0x0A),
pcmcia_ccr_read(pf, 0x0C), pcmcia_ccr_read(pf, 0x0E),
pcmcia_ccr_read(pf, 0x10), pcmcia_ccr_read(pf, 0x12)));
}
}
return (attached ? 0 : 1);
}
void
pcmcia_card_detach(dev, flags)
struct device *dev;
int flags; /* DETACH_* flags */
{
struct pcmcia_softc *sc = (struct pcmcia_softc *) dev;
struct pcmcia_function *pf;
int error;
/*
* We are running on either the PCMCIA socket's event thread
* or in user context detaching a device by user request.
*/
for (pf = SIMPLEQ_FIRST(&sc->card.pf_head); pf != NULL;
pf = SIMPLEQ_NEXT(pf, pf_list)) {
if (SIMPLEQ_FIRST(&pf->cfe_head) == NULL)
continue;
if (pf->child == NULL)
continue;
DPRINTF(("%s: detaching %s (function %d)\n",
sc->dev.dv_xname, pf->child->dv_xname, pf->number));
if ((error = config_detach(pf->child, flags)) != 0) {
printf("%s: error %d detaching %s (function %d)\n",
sc->dev.dv_xname, error, pf->child->dv_xname,
pf->number);
} else
pf->child = NULL;
}
}
void
pcmcia_card_deactivate(dev)
struct device *dev;
{
struct pcmcia_softc *sc = (struct pcmcia_softc *) dev;
struct pcmcia_function *pf;
/*
* We're in the chip's card removal interrupt handler.
* Deactivate the child driver. The PCMCIA socket's
* event thread will run later to finish the detach.
*/
for (pf = SIMPLEQ_FIRST(&sc->card.pf_head); pf != NULL;
pf = SIMPLEQ_NEXT(pf, pf_list)) {
if (SIMPLEQ_FIRST(&pf->cfe_head) == NULL)
continue;
if (pf->child == NULL)
continue;
DPRINTF(("%s: deactivating %s (function %d)\n",
sc->dev.dv_xname, pf->child->dv_xname, pf->number));
config_deactivate(pf->child);
}
}
int
pcmcia_submatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct pcmcia_attach_args *paa = aux;
if (cf->cf_loc[PCMCIACF_FUNCTION] != PCMCIACF_FUNCTION_DEFAULT &&
cf->cf_loc[PCMCIACF_FUNCTION] != paa->pf->number)
return (0);
return ((*cf->cf_attach->ca_match)(parent, cf, aux));
}
int
pcmcia_print(arg, pnp)
void *arg;
const char *pnp;
{
struct pcmcia_attach_args *pa = arg;
struct pcmcia_softc *sc = pa->pf->sc;
struct pcmcia_card *card = &sc->card;
int i;
if (pnp) {
for (i = 0; i < 4; i++) {
if (card->cis1_info[i] == NULL)
break;
if (i)
printf(", ");
printf("%s", card->cis1_info[i]);
}
if (i)
printf(" ");
printf("(manufacturer 0x%x, product 0x%x)", card->manufacturer,
card->product);
}
printf(" function %d", pa->pf->number);
return (UNCONF);
}
int
pcmcia_card_gettype(dev)
struct device *dev;
{
struct pcmcia_softc *sc = (struct pcmcia_softc *)dev;
struct pcmcia_function *pf;
/*
* set the iftype to memory if this card has no functions (not yet
* probed), or only one function, and that is not initialized yet or
* that is memory.
*/
pf = SIMPLEQ_FIRST(&sc->card.pf_head);
if (pf == NULL ||
(SIMPLEQ_NEXT(pf, pf_list) == NULL &&
(pf->cfe == NULL || pf->cfe->iftype == PCMCIA_IFTYPE_MEMORY)))
return (PCMCIA_IFTYPE_MEMORY);
else
return (PCMCIA_IFTYPE_IO);
}
/*
* Initialize a PCMCIA function. May be called as long as the function is
* disabled.
*/
void
pcmcia_function_init(pf, cfe)
struct pcmcia_function *pf;
struct pcmcia_config_entry *cfe;
{
if (pf->pf_flags & PFF_ENABLED)
panic("pcmcia_function_init: function is enabled");
/* Remember which configuration entry we are using. */
pf->cfe = cfe;
}
static inline void pcmcia_socket_enable(pct, pch)
pcmcia_chipset_tag_t pct;
pcmcia_chipset_handle_t *pch;
{
pcmcia_chip_socket_enable(pct, pch);
}
static inline void pcmcia_socket_disable(pct, pch)
pcmcia_chipset_tag_t pct;
pcmcia_chipset_handle_t *pch;
{
pcmcia_chip_socket_disable(pct, pch);
}
/* Enable a PCMCIA function */
int
pcmcia_function_enable(pf)
struct pcmcia_function *pf;
{
struct pcmcia_function *tmp;
int reg;
if (pf->cfe == NULL)
panic("pcmcia_function_enable: function not initialized");
/*
* Increase the reference count on the socket, enabling power, if
* necessary.
*/
if (pf->sc->sc_enabled_count++ == 0)
pcmcia_chip_socket_enable(pf->sc->pct, pf->sc->pch);
DPRINTF(("%s: ++enabled_count = %d\n", pf->sc->dev.dv_xname,
pf->sc->sc_enabled_count));
if (pf->pf_flags & PFF_ENABLED) {
/*
* Don't do anything if we're already enabled.
*/
return (0);
}
/*
* it's possible for different functions' CCRs to be in the same
* underlying page. Check for that.
*/
for (tmp = pf->sc->card.pf_head.sqh_first; tmp != NULL;
tmp = tmp->pf_list.sqe_next) {
if ((tmp->pf_flags & PFF_ENABLED) &&
(pf->ccr_base >= (tmp->ccr_base - tmp->pf_ccr_offset)) &&
((pf->ccr_base + PCMCIA_CCR_SIZE) <=
(tmp->ccr_base - tmp->pf_ccr_offset +
tmp->pf_ccr_realsize))) {
pf->pf_ccrt = tmp->pf_ccrt;
pf->pf_ccrh = tmp->pf_ccrh;
pf->pf_ccr_realsize = tmp->pf_ccr_realsize;
/*
* pf->pf_ccr_offset = (tmp->pf_ccr_offset -
* tmp->ccr_base) + pf->ccr_base;
*/
pf->pf_ccr_offset =
(tmp->pf_ccr_offset + pf->ccr_base) -
tmp->ccr_base;
pf->pf_ccr_window = tmp->pf_ccr_window;
break;
}
}
if (tmp == NULL) {
if (pcmcia_mem_alloc(pf, PCMCIA_CCR_SIZE, &pf->pf_pcmh))
goto bad;
if (pcmcia_mem_map(pf, PCMCIA_MEM_ATTR, pf->ccr_base,
PCMCIA_CCR_SIZE, &pf->pf_pcmh, &pf->pf_ccr_offset,
&pf->pf_ccr_window)) {
pcmcia_mem_free(pf, &pf->pf_pcmh);
goto bad;
}
}
reg = (pf->cfe->number & PCMCIA_CCR_OPTION_CFINDEX);
reg |= PCMCIA_CCR_OPTION_LEVIREQ;
if (pcmcia_mfc(pf->sc)) {
reg |= (PCMCIA_CCR_OPTION_FUNC_ENABLE |
PCMCIA_CCR_OPTION_ADDR_DECODE);
if (pf->ih_fct)
reg |= PCMCIA_CCR_OPTION_IREQ_ENABLE;
}
pcmcia_ccr_write(pf, PCMCIA_CCR_OPTION, reg);
reg = 0;
if ((pf->cfe->flags & PCMCIA_CFE_IO16) == 0)
reg |= PCMCIA_CCR_STATUS_IOIS8;
if (pf->cfe->flags & PCMCIA_CFE_AUDIO)
reg |= PCMCIA_CCR_STATUS_AUDIO;
pcmcia_ccr_write(pf, PCMCIA_CCR_STATUS, reg);
pcmcia_ccr_write(pf, PCMCIA_CCR_SOCKETCOPY, 0);
if (pcmcia_mfc(pf->sc)) {
long tmp, iosize;
tmp = pf->pf_mfc_iomax - pf->pf_mfc_iobase;
/* round up to nearest (2^n)-1 */
for (iosize = 1; iosize < tmp; iosize <<= 1)
;
iosize--;
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE0,
pf->pf_mfc_iobase & 0xff);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE1,
(pf->pf_mfc_iobase >> 8) & 0xff);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE2, 0);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE3, 0);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOSIZE, iosize);
}
DPRINTF(("%s: function %d CCR at %d offset %lx: "
"%x %x %x %x, %x %x %x %x, %x\n",
pf->sc->dev.dv_xname, pf->number,
pf->pf_ccr_window, pf->pf_ccr_offset,
pcmcia_ccr_read(pf, 0x00), pcmcia_ccr_read(pf, 0x02),
pcmcia_ccr_read(pf, 0x04), pcmcia_ccr_read(pf, 0x06),
pcmcia_ccr_read(pf, 0x0A), pcmcia_ccr_read(pf, 0x0C),
pcmcia_ccr_read(pf, 0x0E), pcmcia_ccr_read(pf, 0x10),
pcmcia_ccr_read(pf, 0x12)));
pf->pf_flags |= PFF_ENABLED;
return (0);
bad:
/*
* Decrement the reference count, and power down the socket, if
* necessary.
*/
if (--pf->sc->sc_enabled_count == 0)
pcmcia_chip_socket_disable(pf->sc->pct, pf->sc->pch);
DPRINTF(("%s: --enabled_count = %d\n", pf->sc->dev.dv_xname,
pf->sc->sc_enabled_count));
return (1);
}
/* Disable PCMCIA function. */
void
pcmcia_function_disable(pf)
struct pcmcia_function *pf;
{
struct pcmcia_function *tmp;
if (pf->cfe == NULL)
panic("pcmcia_function_enable: function not initialized");
if ((pf->pf_flags & PFF_ENABLED) == 0) {
/*
* Don't do anything if we're already disabled.
*/
return;
}
/*
* it's possible for different functions' CCRs to be in the same
* underlying page. Check for that. Note we mark us as disabled
* first to avoid matching ourself.
*/
pf->pf_flags &= ~PFF_ENABLED;
for (tmp = pf->sc->card.pf_head.sqh_first; tmp != NULL;
tmp = tmp->pf_list.sqe_next) {
if ((tmp->pf_flags & PFF_ENABLED) &&
(pf->ccr_base >= (tmp->ccr_base - tmp->pf_ccr_offset)) &&
((pf->ccr_base + PCMCIA_CCR_SIZE) <=
(tmp->ccr_base - tmp->pf_ccr_offset + tmp->pf_ccr_realsize)))
break;
}
/* Not used by anyone else; unmap the CCR. */
if (tmp == NULL) {
pcmcia_mem_unmap(pf, pf->pf_ccr_window);
pcmcia_mem_free(pf, &pf->pf_pcmh);
}
/*
* Decrement the reference count, and power down the socket, if
* necessary.
*/
if (--pf->sc->sc_enabled_count == 0)
pcmcia_chip_socket_disable(pf->sc->pct, pf->sc->pch);
DPRINTF(("%s: --enabled_count = %d\n", pf->sc->dev.dv_xname,
pf->sc->sc_enabled_count));
}
int
pcmcia_io_map(pf, width, offset, size, pcihp, windowp)
struct pcmcia_function *pf;
int width;
bus_addr_t offset;
bus_size_t size;
struct pcmcia_io_handle *pcihp;
int *windowp;
{
int reg;
if (pcmcia_chip_io_map(pf->sc->pct, pf->sc->pch,
width, offset, size, pcihp, windowp))
return (1);
/*
* XXX in the multifunction multi-iospace-per-function case, this
* needs to cooperate with io_alloc to make sure that the spaces
* don't overlap, and that the ccr's are set correctly
*/
if (pcmcia_mfc(pf->sc)) {
long tmp, iosize;
if (pf->pf_mfc_iomax == 0) {
pf->pf_mfc_iobase = pcihp->addr + offset;
pf->pf_mfc_iomax = pf->pf_mfc_iobase + size;
} else {
/* this makes the assumption that nothing overlaps */
if (pf->pf_mfc_iobase > pcihp->addr + offset)
pf->pf_mfc_iobase = pcihp->addr + offset;
if (pf->pf_mfc_iomax < pcihp->addr + offset + size)
pf->pf_mfc_iomax = pcihp->addr + offset + size;
}
tmp = pf->pf_mfc_iomax - pf->pf_mfc_iobase;
/* round up to nearest (2^n)-1 */
for (iosize = 1; iosize >= tmp; iosize <<= 1)
;
iosize--;
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE0,
pf->pf_mfc_iobase & 0xff);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE1,
(pf->pf_mfc_iobase >> 8) & 0xff);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE2, 0);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOBASE3, 0);
pcmcia_ccr_write(pf, PCMCIA_CCR_IOSIZE, iosize);
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_OPTION);
reg |= PCMCIA_CCR_OPTION_ADDR_DECODE;
pcmcia_ccr_write(pf, PCMCIA_CCR_OPTION, reg);
}
return (0);
}
void
pcmcia_io_unmap(pf, window)
struct pcmcia_function *pf;
int window;
{
pcmcia_chip_io_unmap(pf->sc->pct, pf->sc->pch, window);
/* XXX Anything for multi-function cards? */
}
void *
pcmcia_intr_establish(pf, ipl, ih_fct, ih_arg)
struct pcmcia_function *pf;
int ipl;
int (*ih_fct) __P((void *));
void *ih_arg;
{
void *ret;
/* behave differently if this is a multifunction card */
if (pcmcia_mfc(pf->sc)) {
int s, ihcnt, hiipl, reg;
struct pcmcia_function *pf2;
/*
* mask all the ipl's which are already used by this card,
* and find the highest ipl number (lowest priority)
*/
ihcnt = 0;
s = 0; /* this is only here to keep the compiler
happy */
hiipl = 0; /* this is only here to keep the compiler
happy */
for (pf2 = pf->sc->card.pf_head.sqh_first; pf2 != NULL;
pf2 = pf2->pf_list.sqe_next) {
if (pf2->ih_fct) {
DPRINTF(("%s: function %d has ih_fct %p\n",
pf->sc->dev.dv_xname, pf2->number,
pf2->ih_fct));
if (ihcnt == 0) {
hiipl = pf2->ih_ipl;
} else {
if (pf2->ih_ipl > hiipl)
hiipl = pf2->ih_ipl;
}
ihcnt++;
}
}
/*
* establish the real interrupt, changing the ipl if
* necessary
*/
if (ihcnt == 0) {
#ifdef DIAGNOSTIC
if (pf->sc->ih != NULL)
panic("card has intr handler, but no function does");
#endif
s = splhigh();
/* set up the handler for the new function */
pf->ih_fct = ih_fct;
pf->ih_arg = ih_arg;
pf->ih_ipl = ipl;
pf->sc->ih = pcmcia_chip_intr_establish(pf->sc->pct,
pf->sc->pch, pf, ipl, pcmcia_card_intr, pf->sc);
splx(s);
} else if (ipl > hiipl) {
#ifdef DIAGNOSTIC
if (pf->sc->ih == NULL)
panic("functions have ih, but the card does not");
#endif
/* XXX need #ifdef for splserial on x86 */
s = splhigh();
pcmcia_chip_intr_disestablish(pf->sc->pct, pf->sc->pch,
pf->sc->ih);
/* set up the handler for the new function */
pf->ih_fct = ih_fct;
pf->ih_arg = ih_arg;
pf->ih_ipl = ipl;
pf->sc->ih = pcmcia_chip_intr_establish(pf->sc->pct,
pf->sc->pch, pf, ipl, pcmcia_card_intr, pf->sc);
splx(s);
} else {
s = splhigh();
/* set up the handler for the new function */
pf->ih_fct = ih_fct;
pf->ih_arg = ih_arg;
pf->ih_ipl = ipl;
splx(s);
}
ret = pf->sc->ih;
if (ret != NULL) {
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_OPTION);
reg |= PCMCIA_CCR_OPTION_IREQ_ENABLE;
pcmcia_ccr_write(pf, PCMCIA_CCR_OPTION, reg);
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_STATUS);
reg |= PCMCIA_CCR_STATUS_INTRACK;
pcmcia_ccr_write(pf, PCMCIA_CCR_STATUS, reg);
}
} else {
ret = pcmcia_chip_intr_establish(pf->sc->pct, pf->sc->pch,
pf, ipl, ih_fct, ih_arg);
}
return (ret);
}
void
pcmcia_intr_disestablish(pf, ih)
struct pcmcia_function *pf;
void *ih;
{
/* behave differently if this is a multifunction card */
if (pcmcia_mfc(pf->sc)) {
int s, ihcnt, hiipl;
struct pcmcia_function *pf2;
/*
* mask all the ipl's which are already used by this card,
* and find the highest ipl number (lowest priority). Skip
* the current function.
*/
ihcnt = 0;
s = 0; /* this is only here to keep the compipler
happy */
hiipl = 0; /* this is only here to keep the compipler
happy */
for (pf2 = pf->sc->card.pf_head.sqh_first; pf2 != NULL;
pf2 = pf2->pf_list.sqe_next) {
if (pf2 == pf)
continue;
if (pf2->ih_fct) {
if (ihcnt == 0) {
hiipl = pf2->ih_ipl;
} else {
if (pf2->ih_ipl > hiipl)
hiipl = pf2->ih_ipl;
}
ihcnt++;
}
}
/*
* if the ih being removed is lower priority than the lowest
* priority remaining interrupt, up the priority.
*/
/* ihcnt is the number of interrupt handlers *not* including
the one about to be removed. */
if (ihcnt == 0) {
int reg;
#ifdef DIAGNOSTIC
if (pf->sc->ih == NULL)
panic("disestablishing last function, but card has no ih");
#endif
pcmcia_chip_intr_disestablish(pf->sc->pct, pf->sc->pch,
pf->sc->ih);
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_OPTION);
reg &= ~PCMCIA_CCR_OPTION_IREQ_ENABLE;
pcmcia_ccr_write(pf, PCMCIA_CCR_OPTION, reg);
pf->ih_fct = NULL;
pf->ih_arg = NULL;
pf->sc->ih = NULL;
} else if (pf->ih_ipl > hiipl) {
#ifdef DIAGNOSTIC
if (pf->sc->ih == NULL)
panic("changing ih ipl, but card has no ih");
#endif
/* XXX need #ifdef for splserial on x86 */
s = splhigh();
pcmcia_chip_intr_disestablish(pf->sc->pct, pf->sc->pch,
pf->sc->ih);
pf->sc->ih = pcmcia_chip_intr_establish(pf->sc->pct,
pf->sc->pch, pf, hiipl, pcmcia_card_intr, pf->sc);
/* null out the handler for this function */
pf->ih_fct = NULL;
pf->ih_arg = NULL;
splx(s);
} else {
s = splhigh();
pf->ih_fct = NULL;
pf->ih_arg = NULL;
splx(s);
}
} else {
pcmcia_chip_intr_disestablish(pf->sc->pct, pf->sc->pch, ih);
}
}
int
pcmcia_card_intr(arg)
void *arg;
{
struct pcmcia_softc *sc = arg;
struct pcmcia_function *pf;
int reg, ret, ret2;
ret = 0;
for (pf = sc->card.pf_head.sqh_first; pf != NULL;
pf = pf->pf_list.sqe_next) {
#if 0
printf("%s: intr flags=%x fct=%d physaddr=%lx cor=%02x csr=%02x pin=%02x",
sc->dev.dv_xname, pf->pf_flags, pf->number,
pmap_extract(pmap_kernel(),
(vaddr_t) pf->pf_ccrh) + pf->pf_ccr_offset,
pcmcia_ccr_read(pf, PCMCIA_CCR_OPTION),
pcmcia_ccr_read(pf, PCMCIA_CCR_STATUS),
pcmcia_ccr_read(pf, PCMCIA_CCR_PIN));
#endif
if (pf->ih_fct != NULL &&
(pf->ccr_mask & (1 << (PCMCIA_CCR_STATUS / 2)))) {
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_STATUS);
if (reg & PCMCIA_CCR_STATUS_INTR) {
ret2 = (*pf->ih_fct)(pf->ih_arg);
if (ret2 != 0 && ret == 0)
ret = ret2;
reg = pcmcia_ccr_read(pf, PCMCIA_CCR_STATUS);
#if 0
printf("; csr %02x->%02x",
reg, reg & ~PCMCIA_CCR_STATUS_INTR);
#endif
pcmcia_ccr_write(pf, PCMCIA_CCR_STATUS,
reg & ~PCMCIA_CCR_STATUS_INTR);
}
}
#if 0
printf("\n");
#endif
}
return (ret);
}
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