6d02356368
these structs for conflics... it still exist that two PnP cards can colide, but this is up to the user to make sure it doesn't happen... other modifications to pnp.c to format output properly, and hide more output behind bootverbose flag... fix some bugons in pnp.h that would of made it difficult for inclusion in external programs (for import of pnpinfo)
562 lines
16 KiB
C
562 lines
16 KiB
C
/*
|
|
* Copyright (c) 1996, Sujal M. Patel
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $Id: pnp.c,v 1.2 1997/09/18 08:04:11 jmg Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h> /* for DATA_SET */
|
|
#include <sys/malloc.h>
|
|
#include <sys/interrupt.h>
|
|
#include <machine/clock.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <machine/md_var.h>
|
|
|
|
#include <i386/isa/pnp.h>
|
|
#include <i386/isa/isa_device.h>
|
|
#include <i386/isa/isa.h>
|
|
#include <i386/isa/icu.h>
|
|
|
|
int num_pnp_cards = 0;
|
|
pnp_id pnp_devices[MAX_PNP_CARDS];
|
|
struct pnp_dlist_node *pnp_device_list;
|
|
static struct pnp_dlist_node **pnp_device_list_last_ptr;
|
|
|
|
/*
|
|
* these entries are initialized using the autoconfig menu
|
|
* The struct is invalid (and must be initialized) if the first
|
|
* CSN is zero. The init code fills invalid entries with CSN 255
|
|
* which is not a supported value.
|
|
*/
|
|
|
|
struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { { 0 } };
|
|
/*
|
|
* the following is a flag which tells if the data is valid.
|
|
*/
|
|
|
|
static int doing_pnp_probe = 0 ;
|
|
static int current_csn ;
|
|
static int current_pnp_id ;
|
|
static int current_pnp_serial ;
|
|
|
|
/*
|
|
* the following block is an example on what is needed for
|
|
* a PnP device driver.
|
|
*/
|
|
static char* nullpnp_probe(u_long csn, u_long vendor_id);
|
|
static void nullpnp_attach(u_long csn, u_long vendor_id, char *name,
|
|
struct isa_device *dev);
|
|
static u_long nullpnp_count = 0 ;
|
|
|
|
static struct pnp_device nullpnp_device = {
|
|
"goodpnp",
|
|
nullpnp_probe,
|
|
nullpnp_attach,
|
|
&nullpnp_count,
|
|
NULL /* imask */
|
|
};
|
|
|
|
DATA_SET (pnpdevice_set, nullpnp_device);
|
|
|
|
static char*
|
|
nullpnp_probe(u_long tag, u_long type)
|
|
{
|
|
if (bootverbose)
|
|
printf("Called nullpnp_probe with tag 0x%08lx, type 0x%08lx\n",
|
|
tag, type);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
nullpnp_attach(u_long csn, u_long vend_id, char *name,
|
|
struct isa_device *dev)
|
|
{
|
|
printf("nullpnp_attach: csn %ld, vend_id 0x%08lx name %s unit %d\n",
|
|
csn, vend_id, name, dev->id_unit);
|
|
return;
|
|
}
|
|
|
|
/* The READ_DATA port that we are using currently */
|
|
static int pnp_rd_port;
|
|
|
|
void pnp_send_Initiation_LFSR (void);
|
|
int pnp_get_serial (pnp_id *p);
|
|
void config_pnp_device (pnp_id *p, int csn);
|
|
int pnp_isolation_protocol (void);
|
|
void pnp_write(int d, u_char r);
|
|
u_char pnp_read(int d);
|
|
|
|
void
|
|
pnp_write(int d, u_char r)
|
|
{
|
|
outb (_PNP_ADDRESS, d);
|
|
outb (_PNP_WRITE_DATA, r);
|
|
}
|
|
|
|
u_char
|
|
pnp_read(int d)
|
|
{
|
|
outb (_PNP_ADDRESS, d);
|
|
return (inb(3 | (pnp_rd_port <<2)));
|
|
}
|
|
|
|
/*
|
|
* Send Initiation LFSR as described in "Plug and Play ISA Specification",
|
|
* Intel May 94.
|
|
*/
|
|
void
|
|
pnp_send_Initiation_LFSR()
|
|
{
|
|
int cur, i;
|
|
|
|
/* Reset the LSFR */
|
|
outb(_PNP_ADDRESS, 0);
|
|
outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */
|
|
|
|
cur = 0x6a;
|
|
outb(_PNP_ADDRESS, cur);
|
|
|
|
for (i = 1; i < 32; i++) {
|
|
cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
|
|
outb(_PNP_ADDRESS, cur);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Get the device's serial number. Returns 1 if the serial is valid.
|
|
*/
|
|
int
|
|
pnp_get_serial(pnp_id *p)
|
|
{
|
|
int i, bit, valid = 0, sum = 0x6a;
|
|
u_char *data = (u_char *)p;
|
|
|
|
bzero(data, sizeof(char) * 9);
|
|
outb(_PNP_ADDRESS, SERIAL_ISOLATION);
|
|
for (i = 0; i < 72; i++) {
|
|
bit = inb((pnp_rd_port << 2) | 0x3) == 0x55;
|
|
DELAY(250); /* Delay 250 usec */
|
|
|
|
/* Can't Short Circuit the next evaluation, so 'and' is last */
|
|
bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit;
|
|
DELAY(250); /* Delay 250 usec */
|
|
|
|
valid = valid || bit;
|
|
|
|
if (i < 64)
|
|
sum = (sum >> 1) |
|
|
(((sum ^ (sum >> 1) ^ bit) << 7) & 0xff);
|
|
|
|
data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0);
|
|
}
|
|
|
|
valid = valid && (data[8] == sum);
|
|
|
|
return valid;
|
|
}
|
|
|
|
/*
|
|
* read_pnp_parms loads pnp parameters from the currently selected
|
|
* device into the struct pnp_cinfo parameter passed.
|
|
* The second argument specifies the Logical Device to use.
|
|
*/
|
|
int
|
|
read_pnp_parms(struct pnp_cinfo *d, int ldn)
|
|
{
|
|
int i ;
|
|
|
|
if (doing_pnp_probe == 0 || d == NULL)
|
|
return 0 ; /* fail */
|
|
|
|
bzero(d, sizeof(struct pnp_cinfo));
|
|
d->vendor_id = current_pnp_id ;
|
|
d->serial = current_pnp_serial ;
|
|
|
|
d->csn = current_csn ;
|
|
d->ldn = ldn ; /* XXX this should be different ... */
|
|
pnp_write (SET_LDN, ldn );
|
|
i = pnp_read(SET_LDN) ;
|
|
if (i != ldn) {
|
|
printf("Warning: LDN %d does not exist\n", ldn);
|
|
}
|
|
for (i = 0; i < 8; i++) {
|
|
d->port[i] = pnp_read(IO_CONFIG_BASE + i * 2) << 8 ;
|
|
d->port[i] |= pnp_read(IO_CONFIG_BASE + i * 2 + 1);
|
|
|
|
if (i < 4) {
|
|
d->mem[i].base = pnp_read (MEM_CONFIG + i*8) << 16 ;
|
|
d->mem[i].base |= pnp_read (MEM_CONFIG + i*8 + 1) << 8 ;
|
|
d->mem[i].control = pnp_read (MEM_CONFIG + i*8 + 2) ;
|
|
d->mem[i].range = pnp_read (MEM_CONFIG + i*8 + 3) << 16 ;
|
|
d->mem[i].range |= pnp_read (MEM_CONFIG + i*8 + 4) << 8 ;
|
|
}
|
|
if (i < 2) {
|
|
d->irq[i] = pnp_read(IRQ_CONFIG + i * 2);
|
|
d->irq_type[i] = pnp_read(IRQ_CONFIG + 1 + i * 2);
|
|
d->drq[i] = pnp_read(DRQ_CONFIG + i);
|
|
}
|
|
}
|
|
d->enable = pnp_read(ACTIVATE);
|
|
for (i = 0 ; i < MAX_PNP_LDN; i++) {
|
|
if (pnp_ldn_overrides[i].csn == d->csn &&
|
|
pnp_ldn_overrides[i].ldn == ldn) {
|
|
d->flags = pnp_ldn_overrides[i].flags ;
|
|
d->override = pnp_ldn_overrides[i].override ;
|
|
break ;
|
|
}
|
|
}
|
|
if (bootverbose)
|
|
printf("port 0x%04x 0x%04x 0x%04x 0x%04x irq %d:%d drq %d:%d en %d\n",
|
|
d->port[0], d->port[1], d->port[2], d->port[3],
|
|
d->irq[0], d->irq[1],
|
|
d->drq[0], d->drq[1],
|
|
d->enable);
|
|
return 1 ; /* success */
|
|
}
|
|
|
|
/*
|
|
* write_pnp_parms initializes a logical device with the parms
|
|
* in d, and then activates the board if the last parameter is 1.
|
|
*/
|
|
|
|
int
|
|
write_pnp_parms(struct pnp_cinfo *d, int ldn)
|
|
{
|
|
int i, empty = -1 ;
|
|
|
|
/*
|
|
* some safety checks first.
|
|
*/
|
|
if (doing_pnp_probe == 0 || d==NULL || d->vendor_id != current_pnp_id)
|
|
return 0 ; /* fail */
|
|
|
|
pnp_write (SET_LDN, ldn );
|
|
i = pnp_read(SET_LDN) ;
|
|
if (i != ldn) {
|
|
printf("Warning: LDN %d does not exist\n", ldn);
|
|
}
|
|
for (i = 0; i < 8; i++) {
|
|
pnp_write(IO_CONFIG_BASE + i * 2, d->port[i] >> 8 );
|
|
pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->port[i] & 0xff );
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
pnp_write(MEM_CONFIG + i*8, (d->mem[i].base >> 16) & 0xff );
|
|
pnp_write(MEM_CONFIG + i*8+1, (d->mem[i].base >> 8) & 0xff );
|
|
pnp_write(MEM_CONFIG + i*8+2, d->mem[i].control & 0xff );
|
|
pnp_write(MEM_CONFIG + i*8+3, (d->mem[i].range >> 16) & 0xff );
|
|
pnp_write(MEM_CONFIG + i*8+4, (d->mem[i].range >> 8) & 0xff );
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
pnp_write(IRQ_CONFIG + i*2 , d->irq[i] );
|
|
pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] );
|
|
pnp_write(DRQ_CONFIG + i, d->drq[i] );
|
|
}
|
|
/*
|
|
* store parameters read into the current kernel
|
|
* so manual editing next time is easier
|
|
*/
|
|
for (i = 0 ; i < MAX_PNP_LDN; i++) {
|
|
if (pnp_ldn_overrides[i].csn == d->csn &&
|
|
pnp_ldn_overrides[i].ldn == ldn) {
|
|
d->flags = pnp_ldn_overrides[i].flags ;
|
|
pnp_ldn_overrides[i] = *d ;
|
|
break ;
|
|
} else if (pnp_ldn_overrides[i].csn < 1 ||
|
|
pnp_ldn_overrides[i].csn == 255)
|
|
empty = i ;
|
|
}
|
|
if (i== MAX_PNP_LDN && empty != -1)
|
|
pnp_ldn_overrides[empty] = *d;
|
|
|
|
/*
|
|
* Here should really perform the range check, and
|
|
* return a failure if not successful.
|
|
*/
|
|
pnp_write (IO_RANGE_CHECK, 0);
|
|
DELAY(1000); /* XXX is it really necessary ? */
|
|
pnp_write (ACTIVATE, d->enable ? 1 : 0);
|
|
DELAY(1000); /* XXX is it really necessary ? */
|
|
return 1 ;
|
|
}
|
|
|
|
/*
|
|
* To finalize a card's initialization, and before accessing its
|
|
* registers, we need to bring the card in WaitForKey. To this purpose,
|
|
* we need to issue a WaitForKey command, which brings _all_ cards
|
|
* in that state. So, before configuring the next board, we must also
|
|
* sent the Init-Key to bring cards to the SLEEP state again.
|
|
*
|
|
* In fact, one could hope that cards respond to normal I/O accesses
|
|
* even in the SLEEP state, which could be done by issuing a WAKE[0].
|
|
* This seems to work on the CS4236, but not on the CS4232 on my Zappa
|
|
* motherboard .
|
|
*/
|
|
int
|
|
enable_pnp_card()
|
|
{
|
|
/* the next wake should bring the card in WaitForKey ? */
|
|
pnp_write (WAKE, 0);
|
|
pnp_write(CONFIG_CONTROL, 0x02); /* All cards in WaitForKey */
|
|
DELAY(1000); /* XXX is it really necessary ? */
|
|
return 1 ; /* success */
|
|
}
|
|
|
|
/*
|
|
* Configure PnP devices. pnp_id is made of:
|
|
* 4 bytes: board id (which can be printed as an ascii string);
|
|
* 4 bytes: board serial number (often 0 or -1 ?)
|
|
*/
|
|
|
|
void
|
|
config_pnp_device(pnp_id *p, int csn)
|
|
{
|
|
static struct pnp_dlist_node *nod = NULL;
|
|
int i;
|
|
u_char *data = (u_char *)p;
|
|
|
|
/* these are for autoconfigure a-la pci */
|
|
struct pnp_device *dvp, **dvpp;
|
|
char *name ;
|
|
|
|
printf("CSN %d Vendor ID: %c%c%c%02x%02x [0x%08lx] Serial 0x%08lx\n", csn,
|
|
((data[0] & 0x7c) >> 2) + '@',
|
|
(((data[0] & 0x03) << 3) | ((data[1] & 0xe0) >> 5)) + '@',
|
|
(data[1] & 0x1f) + '@', data[2], data[3], p->vendor_id, p->serial);
|
|
|
|
doing_pnp_probe = 1 ;
|
|
current_csn = csn ;
|
|
current_pnp_id = p->vendor_id ;
|
|
current_pnp_serial = p->serial ;
|
|
|
|
/*
|
|
* use kernel table to override possible devices
|
|
*/
|
|
for (i = 0 ; i < MAX_PNP_LDN; i++) {
|
|
if (pnp_ldn_overrides[i].csn == csn &&
|
|
pnp_ldn_overrides[i].override == 1) {
|
|
struct pnp_cinfo d;
|
|
if (bootverbose)
|
|
printf("PnP: override config for CSN %d LDN %d "
|
|
"vend_id 0x%08x\n", csn, pnp_ldn_overrides[i].ldn,
|
|
current_pnp_id);
|
|
/* next assignement is done otherwise read fails */
|
|
d.vendor_id = current_pnp_id ;
|
|
read_pnp_parms(&d, pnp_ldn_overrides[i].ldn);
|
|
if (pnp_ldn_overrides[i].enable == 0) {
|
|
/* just disable ... */
|
|
d.enable = 0;
|
|
write_pnp_parms(&d, pnp_ldn_overrides[i].ldn);
|
|
} else {
|
|
/* set all parameters */
|
|
/* next assignement is done otherwise write fails */
|
|
pnp_ldn_overrides[i].vendor_id = current_pnp_id ;
|
|
write_pnp_parms(&pnp_ldn_overrides[i],
|
|
pnp_ldn_overrides[i].ldn);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* lookup device in ioconfiguration */
|
|
dvpp = (struct pnp_device **)pnpdevice_set.ls_items;
|
|
while ((dvp = *dvpp++)) {
|
|
if (dvp->pd_probe) {
|
|
if ((name = (*dvp->pd_probe)(csn, p->vendor_id)))
|
|
break;
|
|
}
|
|
}
|
|
if (dvp && name && dvp->pd_count) { /* found a matching device */
|
|
int unit ;
|
|
|
|
/* pnpcb->pnpcb_seen |= ( 1ul << csn ) ; */
|
|
|
|
/* get and increment the unit */
|
|
unit = (*dvp->pd_count)++;
|
|
|
|
/*
|
|
* now call the attach routine. The board has not been
|
|
* configured yet, so better not access isa registers in
|
|
* the attach routine until enable_pnp_card() has been done.
|
|
*/
|
|
|
|
if (nod == NULL)
|
|
nod = malloc(sizeof(struct pnp_dlist_node), M_DEVBUF, M_NOWAIT);
|
|
if (nod == NULL)
|
|
panic("malloc failed for PnP resource use");
|
|
bzero(nod, sizeof(*nod));
|
|
nod->pnp = dvp;
|
|
nod->dev.id_unit = unit ;
|
|
if (dvp->pd_attach)
|
|
(*dvp->pd_attach) (csn, p->vendor_id, name, &(nod->dev));
|
|
printf("%s%d (%s <%s> sn 0x%08lx)", nod->dev.id_driver &&
|
|
nod->dev.id_driver->name ? nod->dev.id_driver->name : "unknown",
|
|
unit, dvp->pd_name, name, p->serial);
|
|
if (nod->dev.id_alive) {
|
|
if (nod->dev.id_irq) {
|
|
/* the board uses interrupts. Register it. */
|
|
if (dvp->imask)
|
|
INTRMASK( *(dvp->imask), nod->dev.id_irq );
|
|
register_intr(ffs(nod->dev.id_irq) - 1, nod->dev.id_id,
|
|
nod->dev.id_ri_flags, nod->dev.id_intr,
|
|
dvp->imask, nod->dev.id_unit);
|
|
INTREN(nod->dev.id_irq);
|
|
}
|
|
if (nod->dev.id_alive != 0) {
|
|
if (nod->dev.id_iobase == -1)
|
|
printf(" at ?");
|
|
else {
|
|
printf(" at 0x%x", nod->dev.id_iobase);
|
|
if ((nod->dev.id_iobase + nod->dev.id_alive -1) !=
|
|
nod->dev.id_iobase) {
|
|
printf("-0x%x", nod->dev.id_iobase + nod->dev.id_alive
|
|
- 1);
|
|
}
|
|
}
|
|
}
|
|
if (nod->dev.id_irq)
|
|
printf(" irq %d", ffs(nod->dev.id_irq) - 1);
|
|
if (nod->dev.id_drq != -1)
|
|
printf(" drq %d", nod->dev.id_drq);
|
|
if (nod->dev.id_maddr)
|
|
printf(" maddr 0x%lx", kvtop(nod->dev.id_maddr));
|
|
if (nod->dev.id_msize)
|
|
printf(" msize %d", nod->dev.id_msize);
|
|
if (nod->dev.id_flags)
|
|
printf(" flags 0x%x", nod->dev.id_flags);
|
|
if (nod->dev.id_iobase && !(nod->dev.id_iobase & 0xf300)) {
|
|
printf(" on motherboard");
|
|
printf(" id %d", nod->dev.id_id);
|
|
} else if (nod->dev.id_iobase >= 0x1000 &&
|
|
!(nod->dev.id_iobase & 0x300)) {
|
|
printf (" on eisa slot %d",
|
|
nod->dev.id_iobase >> 12);
|
|
} else {
|
|
printf (" on isa");
|
|
}
|
|
printf("\n");
|
|
if (pnp_device_list_last_ptr == NULL)
|
|
pnp_device_list = nod;
|
|
else
|
|
*pnp_device_list_last_ptr = nod;
|
|
pnp_device_list_last_ptr = &(nod->next);
|
|
nod = NULL;
|
|
} else
|
|
printf(" failed to attach\n");
|
|
}
|
|
doing_pnp_probe = 0 ;
|
|
}
|
|
|
|
|
|
/*
|
|
* Run the isolation protocol. Use pnp_rd_port as the READ_DATA port
|
|
* value (caller should try multiple READ_DATA locations before giving
|
|
* up). Upon exiting, all cards are aware that they should use
|
|
* pnp_rd_port as the READ_DATA port.
|
|
*
|
|
* In the first pass, a csn is assigned to each board and pnp_id's
|
|
* are saved to an array, pnp_devices. In the second pass, each
|
|
* card is woken up and the device configuration is called.
|
|
*/
|
|
int
|
|
pnp_isolation_protocol()
|
|
{
|
|
int csn;
|
|
|
|
pnp_send_Initiation_LFSR();
|
|
|
|
pnp_write(CONFIG_CONTROL, 0x04); /* Reset CSN for All Cards */
|
|
|
|
for (csn = 1; (csn < MAX_PNP_CARDS); csn++) {
|
|
/* Wake up cards without a CSN */
|
|
pnp_write(WAKE, 0);
|
|
pnp_write(SET_RD_DATA, pnp_rd_port);
|
|
outb(_PNP_ADDRESS, SERIAL_ISOLATION);
|
|
DELAY(1000); /* Delay 1 msec */
|
|
|
|
if (pnp_get_serial( &(pnp_devices[csn-1]) ) ) {
|
|
pnp_write(SET_CSN, csn);
|
|
/* pnp_write(CONFIG_CONTROL, 2); */
|
|
} else
|
|
break;
|
|
}
|
|
num_pnp_cards = csn - 1;
|
|
for (csn = 1; csn <= num_pnp_cards ; csn++) {
|
|
/*
|
|
* make sure cards are in SLEEP state
|
|
*/
|
|
pnp_send_Initiation_LFSR();
|
|
pnp_write(WAKE, csn);
|
|
config_pnp_device( &(pnp_devices[csn-1]), csn);
|
|
/*
|
|
* Put all cards in WaitForKey, just in case the previous
|
|
* attach routine forgot it.
|
|
*/
|
|
pnp_write(CONFIG_CONTROL, 0x02);
|
|
DELAY(1000); /* XXX is it really necessary ? */
|
|
}
|
|
return num_pnp_cards ;
|
|
}
|
|
|
|
|
|
/*
|
|
* pnp_configure()
|
|
*
|
|
* autoconfiguration of pnp devices. This routine just runs the
|
|
* isolation protocol over several ports, until one is successful.
|
|
*
|
|
* may be called more than once ?
|
|
*
|
|
*/
|
|
|
|
void
|
|
pnp_configure()
|
|
{
|
|
int num_pnp_devs;
|
|
|
|
if (pnp_ldn_overrides[0].csn == 0) {
|
|
if (bootverbose)
|
|
printf("Initializing PnP override table\n");
|
|
bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides));
|
|
pnp_ldn_overrides[0].csn = 255 ;
|
|
}
|
|
printf("Probing for PnP devices:\n");
|
|
|
|
/* Try various READ_DATA ports from 0x203-0x3ff */
|
|
for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) {
|
|
if (bootverbose)
|
|
printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3);
|
|
|
|
num_pnp_devs = pnp_isolation_protocol();
|
|
if (num_pnp_devs)
|
|
break;
|
|
}
|
|
if (!num_pnp_devs) {
|
|
if (bootverbose)
|
|
printf("No Plug-n-Play devices were found\n");
|
|
return;
|
|
}
|
|
}
|