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NetBSD/sys/dev/isapnp/isapnp.c

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/* $NetBSD: isapnp.c,v 1.29 1998/10/10 13:43:10 hannken Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*/
/*
* ISA PnP bus autoconfiguration.
*/
#include "isadma.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/isapnp/isapnpreg.h>
#include <dev/isapnp/isapnpvar.h>
#include <dev/isapnp/isapnpdevs.h>
static void isapnp_init __P((struct isapnp_softc *));
static __inline u_char isapnp_shift_bit __P((struct isapnp_softc *));
static int isapnp_findcard __P((struct isapnp_softc *));
static void isapnp_free_region __P((bus_space_tag_t, struct isapnp_region *));
static int isapnp_alloc_region __P((bus_space_tag_t, struct isapnp_region *));
static int isapnp_alloc_irq __P((isa_chipset_tag_t, struct isapnp_pin *));
static int isapnp_alloc_drq __P((isa_chipset_tag_t, struct isapnp_pin *));
static int isapnp_testconfig __P((bus_space_tag_t, bus_space_tag_t,
struct isapnp_attach_args *, int));
static struct isapnp_attach_args *isapnp_bestconfig __P((struct isapnp_softc *,
struct isapnp_attach_args **));
static void isapnp_print_region __P((const char *, struct isapnp_region *,
size_t));
static void isapnp_configure __P((struct isapnp_softc *,
const struct isapnp_attach_args *));
static void isapnp_print_pin __P((const char *, struct isapnp_pin *, size_t));
static int isapnp_print __P((void *, const char *));
#ifdef _KERNEL
static int isapnp_submatch __P((struct device *, struct cfdata *, void *));
#endif
static int isapnp_find __P((struct isapnp_softc *, int));
static int isapnp_match __P((struct device *, struct cfdata *, void *));
static void isapnp_attach __P((struct device *, struct device *, void *));
static void isapnp_callback __P((struct device *));
struct cfattach isapnp_ca = {
sizeof(struct isapnp_softc), isapnp_match, isapnp_attach
};
/*
* This keeps track if which ISA's we have been probed on.
*/
struct isapnp_probe_cookie {
LIST_ENTRY(isapnp_probe_cookie) ipc_link;
struct device *ipc_parent;
};
LIST_HEAD(, isapnp_probe_cookie) isapnp_probes =
LIST_HEAD_INITIALIZER(isapnp_probes);
/* isapnp_init():
* Write the PNP initiation key to wake up the cards...
*/
static void
isapnp_init(sc)
struct isapnp_softc *sc;
{
int i;
u_char v = ISAPNP_LFSR_INIT;
/* First write 0's twice to enter the Wait for Key state */
ISAPNP_WRITE_ADDR(sc, 0);
ISAPNP_WRITE_ADDR(sc, 0);
/* Send the 32 byte sequence to awake the logic */
for (i = 0; i < ISAPNP_LFSR_LENGTH; i++) {
ISAPNP_WRITE_ADDR(sc, v);
v = ISAPNP_LFSR_NEXT(v);
}
}
/* isapnp_shift_bit():
* Read a bit at a time from the config card.
*/
static __inline u_char
isapnp_shift_bit(sc)
struct isapnp_softc *sc;
{
u_char c1, c2;
DELAY(250);
c1 = ISAPNP_READ_DATA(sc);
DELAY(250);
c2 = ISAPNP_READ_DATA(sc);
if (c1 == 0x55 && c2 == 0xAA)
return 0x80;
else
return 0;
}
/* isapnp_findcard():
* Attempt to read the vendor/serial/checksum for a card
* If a card is found [the checksum matches], assign the
* next card number to it and return 1
*/
static int
isapnp_findcard(sc)
struct isapnp_softc *sc;
{
u_char v = ISAPNP_LFSR_INIT, csum, w;
int i, b;
if (sc->sc_ncards == ISAPNP_MAX_CARDS) {
printf("%s: Too many pnp cards\n", sc->sc_dev.dv_xname);
return 0;
}
/* Set the read port */
isapnp_write_reg(sc, ISAPNP_WAKE, 0);
isapnp_write_reg(sc, ISAPNP_SET_RD_PORT, sc->sc_read_port >> 2);
sc->sc_read_port |= 3;
DELAY(1000);
ISAPNP_WRITE_ADDR(sc, ISAPNP_SERIAL_ISOLATION);
DELAY(1000);
/* Read the 8 bytes of the Vendor ID and Serial Number */
for(i = 0; i < 8; i++) {
/* Read each bit separately */
for (w = 0, b = 0; b < 8; b++) {
u_char neg = isapnp_shift_bit(sc);
w >>= 1;
w |= neg;
v = ISAPNP_LFSR_NEXT(v) ^ neg;
}
sc->sc_id[sc->sc_ncards][i] = w;
}
/* Read the remaining checksum byte */
for (csum = 0, b = 0; b < 8; b++) {
u_char neg = isapnp_shift_bit(sc);
csum >>= 1;
csum |= neg;
}
sc->sc_id[sc->sc_ncards][8] = csum;
if (csum == v) {
sc->sc_ncards++;
isapnp_write_reg(sc, ISAPNP_CARD_SELECT_NUM, sc->sc_ncards);
return 1;
}
return 0;
}
/* isapnp_free_region():
* Free a region
*/
static void
isapnp_free_region(t, r)
bus_space_tag_t t;
struct isapnp_region *r;
{
#ifdef _KERNEL
bus_space_unmap(t, r->h, r->length);
#endif
}
/* isapnp_alloc_region():
* Allocate a single region if possible
*/
static int
isapnp_alloc_region(t, r)
bus_space_tag_t t;
struct isapnp_region *r;
{
int error = 0;
for (r->base = r->minbase; r->base <= r->maxbase;
r->base += r->align) {
#ifdef _KERNEL
error = bus_space_map(t, r->base, r->length, 0, &r->h);
#endif
if (error == 0)
return 0;
}
return error;
}
/* isapnp_alloc_irq():
* Allocate an irq
*/
static int
isapnp_alloc_irq(ic, i)
isa_chipset_tag_t ic;
struct isapnp_pin *i;
{
int irq;
#define LEVEL_IRQ (ISAPNP_IRQTYPE_LEVEL_PLUS|ISAPNP_IRQTYPE_LEVEL_MINUS)
i->type = (i->flags & LEVEL_IRQ) ? IST_LEVEL : IST_EDGE;
if (i->bits == 0) {
i->num = 0;
return 0;
}
if (isa_intr_alloc(ic, i->bits, i->type, &irq) == 0) {
i->num = irq;
return 0;
}
return EINVAL;
}
/* isapnp_alloc_drq():
* Allocate a drq
*/
static int
isapnp_alloc_drq(ic, i)
isa_chipset_tag_t ic;
struct isapnp_pin *i;
{
#if NISADMA > 0
int b;
if (i->bits == 0) {
i->num = 0;
return 0;
}
for (b = 0; b < 8; b++)
if ((i->bits & (1 << b)) && isa_drq_isfree(ic, b)) {
i->num = b;
return 0;
}
#endif /* NISADMA > 0 */
return EINVAL;
}
/* isapnp_testconfig():
* Test/Allocate the regions used
*/
static int
isapnp_testconfig(iot, memt, ipa, alloc)
bus_space_tag_t iot, memt;
struct isapnp_attach_args *ipa;
int alloc;
{
int nio = 0, nmem = 0, nmem32 = 0, nirq = 0, ndrq = 0;
int error = 0;
#ifdef DEBUG_ISAPNP
isapnp_print_attach(ipa);
#endif
for (; nio < ipa->ipa_nio; nio++) {
error = isapnp_alloc_region(iot, &ipa->ipa_io[nio]);
if (error)
goto bad;
}
for (; nmem < ipa->ipa_nmem; nmem++) {
error = isapnp_alloc_region(memt, &ipa->ipa_mem[nmem]);
if (error)
goto bad;
}
for (; nmem32 < ipa->ipa_nmem32; nmem32++) {
error = isapnp_alloc_region(memt, &ipa->ipa_mem32[nmem32]);
if (error)
goto bad;
}
for (; nirq < ipa->ipa_nirq; nirq++) {
error = isapnp_alloc_irq(ipa->ipa_ic, &ipa->ipa_irq[nirq]);
if (error)
goto bad;
}
for (; ndrq < ipa->ipa_ndrq; ndrq++) {
error = isapnp_alloc_drq(ipa->ipa_ic, &ipa->ipa_drq[ndrq]);
if (error)
goto bad;
}
if (alloc)
return error;
bad:
#ifdef notyet
for (ndrq--; ndrq >= 0; ndrq--)
isapnp_free_pin(&ipa->ipa_drq[ndrq]);
for (nirq--; nirq >= 0; nirq--)
isapnp_free_pin(&ipa->ipa_irq[nirq]);
#endif
for (nmem32--; nmem32 >= 0; nmem32--)
isapnp_free_region(memt, &ipa->ipa_mem32[nmem32]);
for (nmem--; nmem >= 0; nmem--)
isapnp_free_region(memt, &ipa->ipa_mem[nmem]);
for (nio--; nio >= 0; nio--)
isapnp_free_region(iot, &ipa->ipa_io[nio]);
return error;
}
/* isapnp_config():
* Test/Allocate the regions used
*/
int
isapnp_config(iot, memt, ipa)
bus_space_tag_t iot, memt;
struct isapnp_attach_args *ipa;
{
return isapnp_testconfig(iot, memt, ipa, 1);
}
/* isapnp_unconfig():
* Free the regions used
*/
void
isapnp_unconfig(iot, memt, ipa)
bus_space_tag_t iot, memt;
struct isapnp_attach_args *ipa;
{
int i;
#ifdef notyet
for (i = 0; i < ipa->ipa_ndrq; i++)
isapnp_free_pin(&ipa->ipa_drq[i]);
for (i = 0; i < ipa->ipa_nirq; i++)
isapnp_free_pin(&ipa->ipa_irq[i]);
#endif
for (i = 0; i < ipa->ipa_nmem32; i++)
isapnp_free_region(memt, &ipa->ipa_mem32[i]);
for (i = 0; i < ipa->ipa_nmem; i++)
isapnp_free_region(memt, &ipa->ipa_mem[i]);
for (i = 0; i < ipa->ipa_nio; i++)
isapnp_free_region(iot, &ipa->ipa_io[i]);
}
/* isapnp_bestconfig():
* Return the best configuration for each logical device, remove and
* free all other configurations.
*/
static struct isapnp_attach_args *
isapnp_bestconfig(sc, ipa)
struct isapnp_softc *sc;
struct isapnp_attach_args **ipa;
{
struct isapnp_attach_args *c, *best, *f = *ipa;
int error;
for (;;) {
if (f == NULL)
return NULL;
#define SAMEDEV(a, b) (strcmp((a)->ipa_devlogic, (b)->ipa_devlogic) == 0)
/* Find the best config */
for (best = c = f; c != NULL; c = c->ipa_sibling) {
if (!SAMEDEV(c, f))
continue;
if (c->ipa_pref < best->ipa_pref)
best = c;
}
/*
* Make sure the ISA chipset is initialized! We need
* it to test the best config!
*/
best->ipa_ic = sc->sc_ic;
/* Test the best config */
error = isapnp_testconfig(sc->sc_iot, sc->sc_memt, best, 0);
/* Remove this config from the list */
if (best == f)
f = f->ipa_sibling;
else {
for (c = f; c->ipa_sibling != best; c = c->ipa_sibling)
continue;
c->ipa_sibling = best->ipa_sibling;
}
if (error) {
best->ipa_pref = ISAPNP_DEP_CONFLICTING;
for (c = f; c != NULL; c = c->ipa_sibling)
if (c != best && SAMEDEV(c, best))
break;
/* Last config for this logical device is conflicting */
if (c == NULL) {
*ipa = f;
return best;
}
ISAPNP_FREE(best);
continue;
}
else {
/* Remove all other configs for this device */
struct isapnp_attach_args *l = NULL, *n = NULL, *d;
for (c = f; c; ) {
if (c == best)
continue;
d = c->ipa_sibling;
if (SAMEDEV(c, best))
ISAPNP_FREE(c);
else {
if (n)
n->ipa_sibling = c;
else
l = c;
n = c;
c->ipa_sibling = NULL;
}
c = d;
}
f = l;
}
*ipa = f;
return best;
}
}
/* isapnp_id_to_vendor():
* Convert a pnp ``compressed ascii'' vendor id to a string
*/
char *
isapnp_id_to_vendor(v, id)
char *v;
const u_char *id;
{
static const char hex[] = "0123456789ABCDEF";
char *p = v;
*p++ = 'A' + (id[0] >> 2) - 1;
*p++ = 'A' + ((id[0] & 3) << 3) + (id[1] >> 5) - 1;
*p++ = 'A' + (id[1] & 0x1f) - 1;
*p++ = hex[id[2] >> 4];
*p++ = hex[id[2] & 0x0f];
*p++ = hex[id[3] >> 4];
*p++ = hex[id[3] & 0x0f];
*p = '\0';
return v;
}
/* isapnp_print_region():
* Print a region allocation
*/
static void
isapnp_print_region(str, r, n)
const char *str;
struct isapnp_region *r;
size_t n;
{
size_t i;
if (n == 0)
return;
printf(" %s ", str);
for (i = 0; i < n; i++, r++) {
printf("0x%x", r->base);
if (r->length)
printf("/%d", r->length);
if (i != n - 1)
printf(",");
}
}
/* isapnp_print_pin():
* Print an irq/drq assignment
*/
static void
isapnp_print_pin(str, p, n)
const char *str;
struct isapnp_pin *p;
size_t n;
{
size_t i;
if (n == 0)
return;
printf(" %s ", str);
for (i = 0; i < n; i++, p++) {
printf("%d", p->num);
if (i != n - 1)
printf(",");
}
}
/* isapnp_print():
* Print the configuration line for an ISA PnP card.
*/
static int
isapnp_print(aux, str)
void *aux;
const char *str;
{
struct isapnp_attach_args *ipa = aux;
if (str != NULL)
printf("%s: <%s, %s, %s, %s>",
str, ipa->ipa_devident, ipa->ipa_devlogic,
ipa->ipa_devcompat, ipa->ipa_devclass);
isapnp_print_region("port", ipa->ipa_io, ipa->ipa_nio);
isapnp_print_region("mem", ipa->ipa_mem, ipa->ipa_nmem);
isapnp_print_region("mem32", ipa->ipa_mem32, ipa->ipa_nmem32);
isapnp_print_pin("irq", ipa->ipa_irq, ipa->ipa_nirq);
isapnp_print_pin("drq", ipa->ipa_drq, ipa->ipa_ndrq);
return UNCONF;
}
#ifdef _KERNEL
/* isapnp_submatch():
* Probe the logical device...
*/
static int
isapnp_submatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct cfdata *cf = (struct cfdata *) match;
return ((*cf->cf_attach->ca_match)(parent, match, aux));
}
/* isapnp_devmatch():
* Match a probed device with the information from the driver
*/
int
isapnp_devmatch(ipa, dinfo)
const struct isapnp_attach_args *ipa;
const struct isapnp_devinfo *dinfo;
{
const char *const *name;
for (name = dinfo->devlogic; *name; name++)
if (strcmp(*name, ipa->ipa_devlogic) == 0)
return 1;
for (name = dinfo->devcompat; *name; name++)
if (strcmp(*name, ipa->ipa_devcompat) == 0)
return 1;
return 0;
}
/* isapnp_isa_attach_hook():
* This routine is called from the isa attach code and
* is a kludge; we are resetting all the cards here in order
* to undo any card configuration that the bios did for us, in order
* to avoid having the PnP devices match an isa probe. The correct
* way of doing this is to read the PnP BIOS and find the card settings
* from there. Unfortunately it is not as easy as it sounds.
*/
void
isapnp_isa_attach_hook(isa_sc)
struct isa_softc *isa_sc;
{
struct isapnp_softc sc;
sc.sc_iot = isa_sc->sc_iot;
sc.sc_ncards = 0;
if (isapnp_map(&sc))
return;
isapnp_init(&sc);
isapnp_write_reg(&sc, ISAPNP_CONFIG_CONTROL, ISAPNP_CC_RESET_DRV);
DELAY(2000);
isapnp_unmap(&sc);
}
#endif
/* isapnp_find():
* Probe and add cards
*/
static int
isapnp_find(sc, all)
struct isapnp_softc *sc;
int all;
{
int p;
isapnp_init(sc);
isapnp_write_reg(sc, ISAPNP_CONFIG_CONTROL, ISAPNP_CC_RESET_DRV);
DELAY(2000);
isapnp_init(sc);
DELAY(2000);
for (p = ISAPNP_RDDATA_MIN; p <= ISAPNP_RDDATA_MAX; p += 4) {
sc->sc_read_port = p;
if (isapnp_map_readport(sc))
continue;
DPRINTF(("%s: Trying port %x\r", sc->sc_dev.dv_xname, p));
if (isapnp_findcard(sc))
break;
isapnp_unmap_readport(sc);
}
if (p > ISAPNP_RDDATA_MAX) {
sc->sc_read_port = 0;
return 0;
}
if (all)
while (isapnp_findcard(sc))
continue;
return 1;
}
/* isapnp_configure():
* Configure a PnP card
* XXX: The memory configuration code is wrong. We need to check the
* range/length bit an do appropriate sets.
*/
static void
isapnp_configure(sc, ipa)
struct isapnp_softc *sc;
const struct isapnp_attach_args *ipa;
{
int i;
static u_char isapnp_mem_range[] = ISAPNP_MEM_DESC;
static u_char isapnp_io_range[] = ISAPNP_IO_DESC;
static u_char isapnp_irq_range[] = ISAPNP_IRQ_DESC;
static u_char isapnp_drq_range[] = ISAPNP_DRQ_DESC;
static u_char isapnp_mem32_range[] = ISAPNP_MEM32_DESC;
const struct isapnp_region *r;
const struct isapnp_pin *p;
struct isapnp_region rz;
struct isapnp_pin pz;
memset(&pz, 0, sizeof(pz));
memset(&rz, 0, sizeof(rz));
#define B0(a) ((a) & 0xff)
#define B1(a) (((a) >> 8) & 0xff)
#define B2(a) (((a) >> 16) & 0xff)
#define B3(a) (((a) >> 24) & 0xff)
for (i = 0; i < sizeof(isapnp_io_range); i++) {
if (i < ipa->ipa_nio)
r = &ipa->ipa_io[i];
else
r = &rz;
isapnp_write_reg(sc,
isapnp_io_range[i] + ISAPNP_IO_BASE_15_8, B1(r->base));
isapnp_write_reg(sc,
isapnp_io_range[i] + ISAPNP_IO_BASE_7_0, B0(r->base));
}
for (i = 0; i < sizeof(isapnp_mem_range); i++) {
if (i < ipa->ipa_nmem)
r = &ipa->ipa_mem[i];
else
r = &rz;
isapnp_write_reg(sc,
isapnp_mem_range[i] + ISAPNP_MEM_BASE_23_16, B2(r->base));
isapnp_write_reg(sc,
isapnp_mem_range[i] + ISAPNP_MEM_BASE_15_8, B1(r->base));
isapnp_write_reg(sc,
isapnp_mem_range[i] + ISAPNP_MEM_LRANGE_23_16,
B2(r->length));
isapnp_write_reg(sc,
isapnp_mem_range[i] + ISAPNP_MEM_LRANGE_15_8,
B1(r->length));
}
for (i = 0; i < sizeof(isapnp_irq_range); i++) {
u_char v;
if (i < ipa->ipa_nirq)
p = &ipa->ipa_irq[i];
else
p = &pz;
isapnp_write_reg(sc,
isapnp_irq_range[i] + ISAPNP_IRQ_NUMBER, p->num);
switch (p->flags) {
case ISAPNP_IRQTYPE_LEVEL_PLUS:
v = ISAPNP_IRQ_LEVEL|ISAPNP_IRQ_HIGH;
break;
case ISAPNP_IRQTYPE_EDGE_PLUS:
v = ISAPNP_IRQ_HIGH;
break;
case ISAPNP_IRQTYPE_LEVEL_MINUS:
v = ISAPNP_IRQ_LEVEL;
break;
default:
case ISAPNP_IRQTYPE_EDGE_MINUS:
v = 0;
break;
}
isapnp_write_reg(sc,
isapnp_irq_range[i] + ISAPNP_IRQ_CONTROL, v);
}
for (i = 0; i < sizeof(isapnp_drq_range); i++) {
u_char v;
if (i < ipa->ipa_ndrq)
v = ipa->ipa_drq[i].num;
else
v = 4;
isapnp_write_reg(sc, isapnp_drq_range[i], v);
}
for (i = 0; i < sizeof(isapnp_mem32_range); i++) {
if (i < ipa->ipa_nmem32)
r = &ipa->ipa_mem32[i];
else
r = &rz;
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_BASE_31_24,
B3(r->base));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_BASE_23_16,
B2(r->base));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_BASE_15_8,
B1(r->base));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_BASE_7_0,
B0(r->base));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_LRANGE_31_24,
B3(r->length));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_LRANGE_23_16,
B2(r->length));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_LRANGE_15_8,
B1(r->length));
isapnp_write_reg(sc,
isapnp_mem32_range[i] + ISAPNP_MEM32_LRANGE_7_0,
B0(r->length));
}
}
/* isapnp_match():
* Probe routine
*/
static int
isapnp_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct isapnp_softc sc;
struct isa_attach_args *ia = aux;
struct isapnp_probe_cookie *ipc;
/*
* Ensure we only probe ISA PnP once; we don't actually consume
* bus resources, so we have to prevent being cloned forever.
*/
for (ipc = LIST_FIRST(&isapnp_probes); ipc != NULL;
ipc = LIST_NEXT(ipc, ipc_link))
if (ipc->ipc_parent == parent)
return (0);
ipc = malloc(sizeof(*ipc), M_DEVBUF, M_NOWAIT);
if (ipc == NULL)
panic("isapnp_match: can't allocate probe cookie");
ipc->ipc_parent = parent;
LIST_INSERT_HEAD(&isapnp_probes, ipc, ipc_link);
sc.sc_iot = ia->ia_iot;
(void) strcpy(sc.sc_dev.dv_xname, "(isapnp probe)");
if (isapnp_map(&sc))
return 0;
isapnp_unmap(&sc);
/*
* We always match. We must let all legacy ISA devices map
* their address spaces before we look for a read port.
*/
ia->ia_iobase = ISAPNP_ADDR;
ia->ia_iosize = 1;
return (1);
}
/* isapnp_attach
* Attach the PnP `bus'.
*/
static void
isapnp_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isapnp_softc *sc = (struct isapnp_softc *) self;
struct isa_attach_args *ia = aux;
sc->sc_iot = ia->ia_iot;
sc->sc_memt = ia->ia_memt;
sc->sc_ic = ia->ia_ic;
sc->sc_dmat = ia->ia_dmat;
sc->sc_ncards = 0;
printf(": ISA Plug 'n Play device support\n");
if (isapnp_map(sc)) {
printf("%s: unable to map PnP register\n",
sc->sc_dev.dv_xname);
return;
}
#ifdef _KERNEL
/*
* Defer configuration until the rest of the ISA devices have
* attached themselves.
*/
config_defer(self, isapnp_callback);
#else
isapnp_callback(self);
#endif
}
/* isapnp_callback
* Find and attach PnP cards.
*/
void
isapnp_callback(self)
struct device *self;
{
struct isapnp_softc *sc = (struct isapnp_softc *)self;
struct isapnp_attach_args *ipa, *lpa;
int c, d;
/*
* Look for cards. If none are found, we say so and just return.
*/
if (isapnp_find(sc, 1) == 0) {
printf("%s: no ISA Plug 'n Play devices found\n",
sc->sc_dev.dv_xname);
return;
}
printf("%s: read port 0x%x\n", sc->sc_dev.dv_xname, sc->sc_read_port);
/*
* Now configure all of the cards.
*/
for (c = 0; c < sc->sc_ncards; c++) {
/* Good morning card c */
isapnp_write_reg(sc, ISAPNP_WAKE, c + 1);
if ((ipa = isapnp_get_resource(sc, c)) == NULL)
continue;
DPRINTF(("Selecting attachments\n"));
for (d = 0;
(lpa = isapnp_bestconfig(sc, &ipa)) != NULL; d++) {
isapnp_write_reg(sc, ISAPNP_LOGICAL_DEV_NUM, d);
isapnp_configure(sc, lpa);
#ifdef DEBUG_ISAPNP
{
struct isapnp_attach_args pa;
isapnp_get_config(sc, &pa);
isapnp_print_config(&pa);
}
#endif
DPRINTF(("%s: configuring <%s, %s, %s, %s>\n",
sc->sc_dev.dv_xname,
lpa->ipa_devident, lpa->ipa_devlogic,
lpa->ipa_devcompat, lpa->ipa_devclass));
if (lpa->ipa_pref == ISAPNP_DEP_CONFLICTING) {
printf("%s: <%s, %s, %s, %s> ignored; %s\n",
sc->sc_dev.dv_xname,
lpa->ipa_devident, lpa->ipa_devlogic,
lpa->ipa_devcompat, lpa->ipa_devclass,
"resource conflict");
ISAPNP_FREE(lpa);
continue;
}
lpa->ipa_ic = sc->sc_ic;
lpa->ipa_iot = sc->sc_iot;
lpa->ipa_memt = sc->sc_memt;
lpa->ipa_dmat = sc->sc_dmat;
isapnp_write_reg(sc, ISAPNP_ACTIVATE, 1);
#ifdef _KERNEL
if (config_found_sm(self, lpa, isapnp_print,
isapnp_submatch) == NULL)
isapnp_write_reg(sc, ISAPNP_ACTIVATE, 0);
#else
isapnp_print(lpa, NULL);
printf("\n");
#endif
ISAPNP_FREE(lpa);
}
isapnp_write_reg(sc, ISAPNP_WAKE, 0); /* Good night cards */
}
}
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