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freebsd/sys/i386/isa/pnp.c

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/*
* 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 1.10 1999/04/11 03:06:06 eivind Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/linker_set.h>
#include <sys/malloc.h>
#include <machine/clock.h>
#include <machine/md_var.h>
#include <i386/isa/icu.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/pnp.h>
#include <i386/isa/intr_machdep.h>
typedef struct _pnp_id {
u_long vendor_id;
u_long serial;
u_char checksum;
u_long comp_id;
} pnp_id;
static int num_pnp_cards = 0;
static 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;
static void pnp_send_Initiation_LFSR (void);
static int pnp_get_serial (pnp_id *p);
static void config_pnp_device (pnp_id *p, int csn);
static int pnp_isolation_protocol (void);
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.
*/
static 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.
*/
static 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;
}
/*
* Fill's the buffer with resource info from the device.
* Returns 0 if the device fails to report
*/
static int
pnp_get_resource_info(u_char *buffer, int len)
{
int i, j;
u_char temp;
for (i = 0; i < len; i++) {
outb(_PNP_ADDRESS, STATUS);
for (j = 0; j < 100; j++) {
if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1)
break;
DELAY(1);
}
if (j == 100) {
printf("PnP device failed to report resource data\n");
return 0;
}
outb(_PNP_ADDRESS, RESOURCE_DATA);
temp = inb((pnp_rd_port << 2) | 0x3);
if (buffer != NULL)
buffer[i] = temp;
}
return 1;
}
/*
* 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 ?)
*/
static void
config_pnp_device(pnp_id *p, int csn)
{
static struct pnp_dlist_node *nod = NULL;
int i;
u_char *data = (u_char *)p;
u_char *comp = (u_char *)&p->comp_id;
/* these are for autoconfigure a-la pci */
struct pnp_device *dvp, **dvpp;
char *name = NULL;
printf("CSN %d Vendor ID: %c%c%c%02x%02x [0x%08lx] Serial 0x%08lx Comp ID: %c%c%c%02x%02x [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,
((comp[0] & 0x7c) >> 2) + '@',
(((comp[0] & 0x03) << 3) | ((comp[1] & 0xe0) >> 5)) + '@',
(comp[1] & 0x1f) + '@', comp[2], comp[3],
p->comp_id);
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)) && *name) ||
(p->comp_id &&
(name = (*dvp->pd_probe)(csn, p->comp_id))))
break;
}
}
if (dvp && name && *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 != 0 && nod->dev.id_ointr != NULL) {
/* 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_ointr,
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 ;
}
/*
* Scan Resource Data for Compatible Device ID.
*
* This function exits as soon as it gets a Compatible Device ID, an error
* reading *ANY* Resource Data or ir reaches the end of Resource Data.
* In the first case the return value will be TRUE, FALSE otherwise.
*/
static int
pnp_scan_resdata(pnp_id *p, int csn)
{
u_char tag, resinfo[8];
int large_len, scanning = 1024, retval = FALSE;
while (scanning-- > 0 && pnp_get_resource_info(&tag, 1)) {
if (PNP_RES_TYPE(tag) == 0) {
/* Small resource */
switch (PNP_SRES_NUM(tag)) {
case COMP_DEVICE_ID:
/* Got a compatible device id resource */
if (pnp_get_resource_info(resinfo, PNP_SRES_LEN(tag))) {
bcopy(resinfo, &p->comp_id, 4);
retval = TRUE;
if (bootverbose)
printf("PnP: CSN %d COMP_DEVICE_ID = 0x%08lx\n", csn, p->comp_id);
}
/*
* We found what we were looking for, or got an error from
* pnp_get_resource, => stop scanning (FALLTHROUGH)
*/
case END_TAG:
scanning = 0;
break;
default:
/* Skip this resource */
if (pnp_get_resource_info(NULL, PNP_SRES_LEN(tag)) == 0)
scanning = 0;
break;
}
} else
/* Large resource, skip it */
if (!(pnp_get_resource_info((u_char *)&large_len, 2) && pnp_get_resource_info(NULL, large_len)))
scanning = 0;
}
return retval;
}
/*
* 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.
*/
static 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); */
if (!pnp_scan_resdata(&(pnp_devices[csn-1]), csn))
pnp_devices[csn-1].comp_id = NULL;
} 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;
}
}
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