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freebsd/sys/isa/pnp.c
Doug Rabson 336dd1864d Parse resource descriptions which don't have START_DEPENDANT tags 
correctly.  This fixes resource allocation for various PnP ed cards but
there are other problems which prevent that driver from working right.
1999-09-17 08:18:34 +00:00

768 lines
19 KiB
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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.
*
* $FreeBSD$
* from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <isa/isavar.h>
#include <isa/pnpreg.h>
#include <isa/pnpvar.h>
#include <machine/resource.h>
#include <machine/clock.h>
typedef struct _pnp_id {
u_int32_t vendor_id;
u_int32_t serial;
u_char checksum;
} pnp_id;
struct pnp_set_config_arg {
int csn; /* Card number to configure */
int ldn; /* Logical device on card */
};
struct pnp_quirk {
u_int32_t vendor_id; /* Vendor of the card */
u_int32_t logical_id; /* ID of the device with quirk */
int type;
#define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */
int arg1;
int arg2;
};
struct pnp_quirk pnp_quirks[] = {
/*
* The Gravis UltraSound needs register 0xf2 to be set to 0xff
* to enable power.
* XXX need to know the logical device id.
*/
{ 0x0100561e /* GRV0001 */, 0,
PNP_QUIRK_WRITE_REG, 0xf2, 0xff },
{ 0 }
};
#if 0
/*
* 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 }
};
#endif
/* The READ_DATA port that we are using currently */
static int pnp_rd_port;
static void pnp_send_initiation_key(void);
static int pnp_get_serial(pnp_id *p);
static int pnp_isolation_protocol(device_t parent);
static void
pnp_write(int d, u_char r)
{
outb (_PNP_ADDRESS, d);
outb (_PNP_WRITE_DATA, r);
}
#if 0
static u_char
pnp_read(int d)
{
outb (_PNP_ADDRESS, d);
return (inb(3 | (pnp_rd_port <<2)));
}
#endif
/*
* Send Initiation LFSR as described in "Plug and Play ISA Specification",
* Intel May 94.
*/
static void
pnp_send_initiation_key()
{
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, PNP_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, PNP_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, PNP_RESOURCE_DATA);
temp = inb((pnp_rd_port << 2) | 0x3);
if (buffer != NULL)
buffer[i] = temp;
}
return 1;
}
#if 0
/*
* write_pnp_parms initializes a logical device with the parms
* in d, and then activates the board if the last parameter is 1.
*/
static int
write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn)
{
int i, empty = -1 ;
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->ic_port[i] >> 8 );
pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff );
}
for (i = 0; i < 4; i++) {
pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff );
pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff );
pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff );
pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff );
pnp_write(MEM_CONFIG + i*8+4, (d->ic_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 ;
}
#endif
/*
* This function is called after the bus has assigned resource
* locations for a logical device.
*/
static void
pnp_set_config(void *arg, struct isa_config *config, int enable)
{
int csn = ((struct pnp_set_config_arg *) arg)->csn;
int ldn = ((struct pnp_set_config_arg *) arg)->ldn;
int i;
/*
* First put all cards into Sleep state with the initiation
* key, then put our card into Config state.
*/
pnp_send_initiation_key();
pnp_write(PNP_WAKE, csn);
/*
* Select our logical device so that we can program it.
*/
pnp_write(PNP_SET_LDN, ldn);
/*
* Now program the resources.
*/
for (i = 0; i < config->ic_nmem; i++) {
u_int32_t start = config->ic_mem[i].ir_start;
u_int32_t size = config->ic_mem[i].ir_size;
if (start & 0xff)
panic("pnp_set_config: bogus memory assignment");
pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff);
pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff);
pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff);
pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff);
}
for (; i < ISA_NMEM; i++) {
pnp_write(PNP_MEM_BASE_HIGH(i), 0);
pnp_write(PNP_MEM_BASE_LOW(i), 0);
pnp_write(PNP_MEM_RANGE_HIGH(i), 0);
pnp_write(PNP_MEM_RANGE_LOW(i), 0);
}
for (i = 0; i < config->ic_nport; i++) {
u_int32_t start = config->ic_port[i].ir_start;
pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff);
pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff);
}
for (; i < ISA_NPORT; i++) {
pnp_write(PNP_IO_BASE_HIGH(i), 0);
pnp_write(PNP_IO_BASE_LOW(i), 0);
}
for (i = 0; i < config->ic_nirq; i++) {
int irq = ffs(config->ic_irqmask[i]) - 1;
pnp_write(PNP_IRQ_LEVEL(i), irq);
pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */
}
for (; i < ISA_NIRQ; i++) {
/*
* IRQ 0 is not a valid interrupt selection and
* represents no interrupt selection.
*/
pnp_write(PNP_IRQ_LEVEL(i), 0);
}
for (i = 0; i < config->ic_ndrq; i++) {
int drq = ffs(config->ic_drqmask[i]) - 1;
pnp_write(PNP_DMA_CHANNEL(i), drq);
}
for (; i < ISA_NDRQ; i++) {
/*
* DMA channel 4, the cascade channel is used to
* indicate no DMA channel is active.
*/
pnp_write(PNP_DMA_CHANNEL(i), 4);
}
pnp_write(PNP_ACTIVATE, enable ? 1 : 0);
/*
* Wake everyone up again, we are finished.
*/
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
}
/*
* Process quirks for a logical device.. The card must be in Config state.
*/
static void
pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn)
{
struct pnp_quirk *qp;
for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) {
if (qp->vendor_id == vendor_id
&& (qp->logical_id == 0
|| qp->logical_id == logical_id)) {
switch (qp->type) {
case PNP_QUIRK_WRITE_REG:
pnp_write(PNP_SET_LDN, ldn);
pnp_write(qp->arg1, qp->arg2);
break;
}
}
}
}
/*
* Scan Resource Data for Logical Devices.
*
* This function exits as soon as it gets 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(device_t parent, pnp_id *p, int csn)
{
u_char tag, resinfo[16];
int large_len, scanning = 1024, retval = FALSE;
u_int32_t logical_id;
u_int32_t compat_id;
device_t dev = 0;
int ldn = 0;
struct isa_config card, logdev, alt;
struct isa_config *config;
struct pnp_set_config_arg *csnldn;
int priority = 0;
int seenalt = 0;
char *desc = 0;
bzero(&card, sizeof card);
bzero(&logdev, sizeof logdev);
bzero(&alt, sizeof alt);
config = &card;
while (scanning-- > 0 && pnp_get_resource_info(&tag, 1)) {
if (PNP_RES_TYPE(tag) == 0) {
/* Small resource */
if (pnp_get_resource_info(resinfo,
PNP_SRES_LEN(tag)) == 0) {
scanning = 0;
continue;
}
switch (PNP_SRES_NUM(tag)) {
case PNP_TAG_LOGICAL_DEVICE:
/*
* A new logical device. Scan
* resourcea and add device.
*/
bcopy(resinfo, &logical_id, 4);
pnp_check_quirks(p->vendor_id,
logical_id,
ldn);
compat_id = 0;
logdev = card;
config = &logdev;
dev = BUS_ADD_CHILD(parent,
ISA_ORDER_PNP, NULL, -1);
if (desc)
device_set_desc_copy(dev, desc);
isa_set_vendorid(dev, p->vendor_id);
isa_set_serial(dev, p->serial);
isa_set_logicalid(dev, logical_id);
csnldn = malloc(sizeof *csnldn,
M_DEVBUF, M_NOWAIT);
if (!csnldn) {
device_printf(parent,
"out of memory\n");
scanning = 0;
break;
}
csnldn->csn = csn;
csnldn->ldn = ldn;
ISA_SET_CONFIG_CALLBACK(parent, dev,
pnp_set_config,
csnldn);
seenalt = 0;
ldn++;
break;
case PNP_TAG_COMPAT_DEVICE:
/*
* Got a compatible device id
* resource. Should keep a list of
* compat ids in the device.
*/
bcopy(resinfo, &compat_id, 4);
if (dev)
isa_set_compatid(dev, compat_id);
break;
case PNP_TAG_IRQ_FORMAT:
if (config->ic_nirq == ISA_NIRQ) {
device_printf(parent,
"CSN %d too many irqs",
csn);
scanning = 0;
break;
}
config->ic_irqmask[config->ic_nirq] =
resinfo[0] + (resinfo[1]<<8);
config->ic_nirq++;
break;
case PNP_TAG_DMA_FORMAT:
if (config->ic_ndrq == ISA_NDRQ) {
device_printf(parent,
"CSN %d too many drqs",
csn);
scanning = 0;
break;
}
config->ic_drqmask[config->ic_ndrq] =
resinfo[0];
config->ic_ndrq++;
break;
case PNP_TAG_START_DEPENDANT:
if (config == &alt) {
ISA_ADD_CONFIG(parent, dev,
priority, config);
} else if (config != &logdev) {
device_printf(parent,
"CSN %d malformed\n",
csn);
scanning = 0;
break;
}
/*
* If the priority is not specified,
* then use the default of
* 'acceptable'
*/
if (PNP_SRES_LEN(tag) > 0)
priority = resinfo[0];
else
priority = 1;
alt = logdev;
config = &alt;
break;
case PNP_TAG_END_DEPENDANT:
ISA_ADD_CONFIG(parent, dev, priority, config);
config = &logdev;
seenalt = 1;
break;
case PNP_TAG_IO_RANGE:
if (config->ic_nport == ISA_NPORT) {
device_printf(parent,
"CSN %d too many ports",
csn);
scanning = 0;
break;
}
config->ic_port[config->ic_nport].ir_start =
resinfo[1] + (resinfo[2]<<8);
config->ic_port[config->ic_nport].ir_end =
resinfo[3] + (resinfo[4]<<8)
+ resinfo[6] - 1;
config->ic_port[config->ic_nport].ir_size
=
resinfo[6];
config->ic_port[config->ic_nport].ir_align =
resinfo[5];
config->ic_nport++;
break;
case PNP_TAG_IO_FIXED:
if (config->ic_nport == ISA_NPORT) {
device_printf(parent,
"CSN %d too many ports",
csn);
scanning = 0;
break;
}
config->ic_port[config->ic_nport].ir_start =
resinfo[0] + (resinfo[1]<<8);
config->ic_port[config->ic_nport].ir_end =
resinfo[0] + (resinfo[1]<<8)
+ resinfo[2] - 1;
config->ic_port[config->ic_nport].ir_size
= resinfo[2];
config->ic_port[config->ic_nport].ir_align = 1;
config->ic_nport++;
break;
case PNP_TAG_END:
if (!seenalt)
ISA_ADD_CONFIG(parent, dev,
priority, config);
scanning = 0;
break;
default:
/* Skip this resource */
break;
}
} else {
/* Large resource */
if (pnp_get_resource_info(resinfo, 2) == 0) {
scanning = 0;
continue;
}
large_len = resinfo[0] + (resinfo[1] << 8);
if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
if (desc)
free(desc, M_TEMP);
desc = malloc(large_len + 1,
M_TEMP, M_NOWAIT);
/*
* Note: if malloc fails, this will
* skip the resource instead of
* reading it into desc.
*/
if (pnp_get_resource_info(desc,
large_len) == 0) {
scanning = 0;
}
if (desc) {
/*
* Trim trailing spaces.
*/
while (desc[large_len-1] == ' ')
large_len--;
desc[large_len] = '\0';
if (dev)
device_set_desc_copy
(dev, desc);
}
continue;
}
if (PNP_LRES_NUM(tag) != PNP_TAG_MEMORY_RANGE) {
/* skip */
if (pnp_get_resource_info(NULL,
large_len) == 0) {
scanning = 0;
}
continue;
}
if (pnp_get_resource_info(resinfo, large_len) == 0) {
scanning = 0;
continue;
}
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent,
"CSN %d too many memory ranges",
csn);
scanning = 0;
break;
}
config->ic_mem[config->ic_nmem].ir_start =
(resinfo[4]<<8) + (resinfo[5]<<16);
config->ic_mem[config->ic_nmem].ir_end =
(resinfo[6]<<8) + (resinfo[7]<<16);
config->ic_mem[config->ic_nmem].ir_size =
(resinfo[10]<<8) + (resinfo[11]<<16);
config->ic_mem[config->ic_nmem].ir_align =
resinfo[8] + (resinfo[9]<<8);
if (!config->ic_mem[config->ic_nmem].ir_align)
config->ic_mem[config->ic_nmem].ir_align =
0x10000;
config->ic_nmem++;
}
}
if (desc)
free(desc, M_TEMP);
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(device_t parent)
{
int csn;
pnp_id id;
int found = 0;
/*
* Put all cards into the Sleep state so that we can clear
* their CSNs.
*/
pnp_send_initiation_key();
/*
* Clear the CSN for all cards.
*/
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN);
/*
* Move all cards to the Isolation state.
*/
pnp_write(PNP_WAKE, 0);
/*
* Tell them where the read point is going to be this time.
*/
pnp_write(PNP_SET_RD_DATA, pnp_rd_port);
for (csn = 1; csn < PNP_MAX_CARDS; csn++) {
/*
* Start the serial isolation protocol.
*/
outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
DELAY(1000); /* Delay 1 msec */
if (pnp_get_serial(&id)) {
/*
* We have read the id from a card
* successfully. The card which won the
* isolation protocol will be in Isolation
* mode and all others will be in Sleep. *
* Program the CSN of the isolated card
* (taking it to Config state) and read its
* resources, creating devices as we find
* logical devices on the card.
*/
pnp_write(PNP_SET_CSN, csn);
pnp_scan_resdata(parent, &id, csn);
found++;
} else
break;
/*
* Put this card back to the Sleep state and
* simultaneously move all cards which don't have a
* CSN yet to Isolation state.
*/
pnp_write(PNP_WAKE, 0);
}
/*
* Unless we have chosen the wrong read port, all cards will
* be in Sleep state. Put them back into WaitForKey for
* now. Their resources will be programmed later.
*/
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
return found;
}
/*
* pnp_identify()
*
* autoconfiguration of pnp devices. This routine just runs the
* isolation protocol over several ports, until one is successful.
*
* may be called more than once ?
*
*/
static void
pnp_identify(driver_t *driver, device_t parent)
{
int num_pnp_devs;
#if 0
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 ;
}
#endif
/* 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(parent);
if (num_pnp_devs)
break;
}
}
static device_method_t pnp_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, pnp_identify),
{ 0, 0 }
};
static driver_t pnp_driver = {
"pnp",
pnp_methods,
1, /* no softc */
};
static devclass_t pnp_devclass;
DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
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