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Factor out the PnP resource parser so that it can be re-used by pnpbios

Browse Source 
and acpi.

Reviewed by: msmith
This commit is contained in:
Doug Rabson 1999-10-09 13:11:46 +00:00
parent dd5168ad85
commit 5b45337d82
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=52059
3 changed files with 470 additions and 239 deletions
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461
sys/isa/pnp.c
View File

@ -36,7 +36,6 @@
#include <isa/isavar.h>
#include <isa/pnpreg.h>
#include <isa/pnpvar.h>
#include <machine/resource.h>
#include <machine/clock.h>
typedef struct _pnp_id {
@ -167,14 +166,15 @@ pnp_get_serial(pnp_id *p)
/*
* Fill's the buffer with resource info from the device.
* Returns 0 if the device fails to report
* Returns the number of characters read.
*/
static int
pnp_get_resource_info(u_char *buffer, int len)
{
int i, j;
int i, j, count;
u_char temp;
count = 0;
for (i = 0; i < len; i++) {
outb(_PNP_ADDRESS, PNP_STATUS);
for (j = 0; j < 100; j++) {
@ -184,14 +184,15 @@ pnp_get_resource_info(u_char *buffer, int len)
}
if (j == 100) {
printf("PnP device failed to report resource data\n");
return 0;
return count;
}
outb(_PNP_ADDRESS, PNP_RESOURCE_DATA);
temp = inb((pnp_rd_port << 2) | 0x3);
if (buffer != NULL)
buffer[i] = temp;
count++;
}
return 1;
return count;
}
#if 0
@ -367,272 +368,239 @@ pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn)
* 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
* Resource Data or it 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)
pnp_create_devices(device_t parent, pnp_id *p, int csn,
u_char *resources, int len)
{
u_char tag, resinfo[16];
int large_len, scanning = 1024, retval = FALSE;
u_char tag, *resp, *resinfo, *startres = 0;
int large_len, scanning = len, 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 buf[100];
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 {
resp = resources;
while (scanning > 0) {
tag = *resp++;
scanning--;
if (PNP_RES_TYPE(tag) != 0) {
/* Large resource */
if (pnp_get_resource_info(resinfo, 2) == 0) {
if (scanning < 2) {
scanning = 0;
continue;
}
large_len = resinfo[0] + (resinfo[1] << 8);
large_len = resp[0] + (resp[1] << 8);
resp += 2;
if (scanning < large_len) {
scanning = 0;
continue;
}
resinfo = resp;
resp += large_len;
scanning -= large_len;
if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
if (desc)
free(desc, M_TEMP);
desc = malloc(large_len + 1,
M_TEMP, M_NOWAIT);
if (large_len > sizeof(buf) - 1)
large_len = sizeof(buf) - 1;
bcopy(resinfo, buf, large_len);
/*
* Note: if malloc fails, this will
* skip the resource instead of
* reading it into desc.
* Trim trailing spaces.
*/
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);
}
while (buf[large_len-1] == ' ')
large_len--;
buf[large_len] = '\0';
desc = buf;
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;
continue;
}
/* Small resource */
if (scanning < PNP_SRES_LEN(tag)) {
scanning = 0;
continue;
}
resinfo = resp;
resp += PNP_SRES_LEN(tag);
scanning -= PNP_SRES_LEN(tag);;
switch (PNP_SRES_NUM(tag)) {
case PNP_TAG_LOGICAL_DEVICE:
/*
* Parse the resources for the previous
* logical device (if any).
*/
if (startres) {
pnp_parse_resources(dev, startres,
resinfo - startres - 1);
dev = 0;
startres = 0;
}
if (pnp_get_resource_info(resinfo, large_len) == 0) {
scanning = 0;
continue;
}
if (config->ic_nmem == ISA_NMEM) {
/*
* A new logical device. Scan for end of
* resources.
*/
bcopy(resinfo, &logical_id, 4);
pnp_check_quirks(p->vendor_id, logical_id, ldn);
compat_id = 0;
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,
"CSN %d too many memory ranges",
csn);
"out of memory\n");
scanning = 0;
break;
}
csnldn->csn = csn;
csnldn->ldn = ldn;
ISA_SET_CONFIG_CALLBACK(parent, dev,
pnp_set_config, csnldn);
ldn++;
startres = resp;
break;
case PNP_TAG_END:
if (!startres) {
device_printf(parent,
"malformed resources\n");
scanning = 0;
break;
}
pnp_parse_resources(dev, startres,
resinfo - startres - 1);
dev = 0;
startres = 0;
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++;
default:
/* Skip this resource */
break;
}
}
if (desc)
free(desc, M_TEMP);
return retval;
}
/*
* Read 'amount' bytes of resources from the card, allocating memory
* as needed. If a buffer is already available, it should be passed in
* '*resourcesp' and its length in '*spacep'. The number of resource
* bytes already in the buffer should be passed in '*lenp'. The memory
* allocated will be returned in '*resourcesp' with its size and the
* number of bytes of resources in '*spacep' and '*lenp' respectively.
*/
static int
pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp)
{
u_char *resources = *resourcesp;
u_char *newres;
int space = *spacep;
int len = *lenp;
if (space == 0) {
space = 1024;
resources = malloc(space, M_TEMP, M_NOWAIT);
if (!resources)
return ENOMEM;
}
if (len + amount > space) {
int extra = 1024;
while (len + amount > space + extra)
extra += 1024;
newres = malloc(space + extra, M_TEMP, M_NOWAIT);
if (!newres)
return ENOMEM;
bcopy(resources, newres, len);
free(resources, M_TEMP);
resources = newres;
space += extra;
}
if (pnp_get_resource_info(resources + len, amount) != amount)
return EINVAL;
len += amount;
*resourcesp = resources;
*spacep = space;
*lenp = len;
return 0;
}
/*
* Read all resources from the card, allocating memory as needed. If a
* buffer is already available, it should be passed in '*resourcesp'
* and its length in '*spacep'. The memory allocated will be returned
* in '*resourcesp' with its size and the number of bytes of resources
* in '*spacep' and '*lenp' respectively.
*/
static int
pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp)
{
u_char *resources = *resourcesp;
int space = *spacep;
int len = 0;
int error, done;
u_char tag;
error = 0;
done = 0;
while (!done) {
error = pnp_read_bytes(1, &resources, &space, &len);
if (error)
goto out;
tag = resources[len-1];
if (PNP_RES_TYPE(tag) == 0) {
/*
* Small resource, read contents.
*/
error = pnp_read_bytes(PNP_SRES_LEN(tag),
&resources, &space, &len);
if (error)
goto out;
if (PNP_SRES_NUM(tag) == PNP_TAG_END)
done = 1;
} else {
/*
* Large resource, read length and contents.
*/
error = pnp_read_bytes(2, &resources, &space, &len);
if (error)
goto out;
error = pnp_read_bytes(resources[len-2]
+ (resources[len-1] << 8),
&resources, &space, &len);
if (error)
goto out;
}
}
out:
*resourcesp = resources;
*spacep = space;
*lenp = len;
return error;
}
/*
* Run the isolation protocol. Use pnp_rd_port as the READ_DATA port
* value (caller should try multiple READ_DATA locations before giving
@ -648,7 +616,10 @@ pnp_isolation_protocol(device_t parent)
{
int csn;
pnp_id id;
int found = 0;
int found = 0, len;
u_char *resources = 0;
int space = 0;
int error;
/*
* Put all cards into the Sleep state so that we can clear
@ -683,14 +654,20 @@ pnp_isolation_protocol(device_t parent)
* 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. *
* 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);
error = pnp_read_resources(&resources,
&space,
&len);
if (error)
break;
pnp_create_devices(parent, &id, csn,
resources, len);
found++;
} else
break;
@ -710,6 +687,12 @@ pnp_isolation_protocol(device_t parent)
*/
pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
/*
* Cleanup.
*/
if (resources)
free(resources, M_TEMP);
return found;
}

246
sys/isa/pnpparse.c Normal file
View File

@ -0,0 +1,246 @@
/*-
* Copyright (c) 1999 Doug Rabson
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <isa/isavar.h>
#include <isa/pnpreg.h>
#include <isa/pnpvar.h>
/*
* Parse 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.
*/
void
pnp_parse_resources(device_t dev, u_char *resources, int len)
{
device_t parent = device_get_parent(dev);
u_char tag, *resp, *resinfo;
int large_len, scanning = len;
u_int32_t compat_id;
struct isa_config logdev, alt;
struct isa_config *config;
int priority = 0;
int seenalt = 0;
char buf[100];
bzero(&logdev, sizeof logdev);
bzero(&alt, sizeof alt);
config = &logdev;
resp = resources;
while (scanning > 0) {
tag = *resp++;
scanning--;
if (PNP_RES_TYPE(tag) == 0) {
/* Small resource */
if (scanning < PNP_SRES_LEN(tag)) {
scanning = 0;
continue;
}
resinfo = resp;
resp += PNP_SRES_LEN(tag);
scanning -= PNP_SRES_LEN(tag);;
switch (PNP_SRES_NUM(tag)) {
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);
isa_set_compatid(dev, compat_id);
break;
case PNP_TAG_IRQ_FORMAT:
if (config->ic_nirq == ISA_NIRQ) {
device_printf(parent, "too many irqs");
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, "too many drqs");
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, "malformed\n");
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, "too many ports");
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, "too many ports");
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;
default:
/* Skip this resource */
device_printf(parent, "unexpected tag %d\n",
PNP_SRES_NUM(tag));
break;
}
} else {
/* Large resource */
if (scanning < 2) {
scanning = 0;
continue;
}
large_len = resp[0] + (resp[1] << 8);
resp += 2;
scanning -= 2;
if (scanning < large_len) {
scanning = 0;
continue;
}
resinfo = resp;
resp += large_len;
scanning -= large_len;
if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
if (large_len > sizeof(buf) - 1)
large_len = sizeof(buf) - 1;
bcopy(resinfo, buf, large_len);
/*
* Trim trailing spaces.
*/
while (buf[large_len-1] == ' ')
large_len--;
buf[large_len] = '\0';
device_set_desc_copy(dev, buf);
continue;
}
if (PNP_LRES_NUM(tag) != PNP_TAG_MEMORY_RANGE) {
/* skip */
continue;
}
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges");
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++;
}
}
/*
* Some devices (e.g. network cards) don't have start
* dependant tags and only have a single configuration. If we
* finish parsing without seeing an end dependant tag, add the
* non-dependant configuration to the device.
*/
if (!seenalt)
ISA_ADD_CONFIG(parent, dev, 1, config);
}

2
sys/isa/pnpvar.h
View File

@ -52,6 +52,8 @@ u_char pnp_read(int d); /* currently unused, but who knows... */
| (PNP_HEXTONUM(s[6]) << 24) \
| (PNP_HEXTONUM(s[5]) << 28))
void pnp_parse_resources(device_t dev, u_char *resources, int len);
#endif /* KERNEL */
#endif /* !_ISA_PNPVAR_H_ */