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/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/isa/pnpparse.c 165654 2006-12-30 11:55:47Z ceri $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#include <isa/pnpreg.h>
#include <isa/pnpvar.h>
#define MAXDEP 8
#define I16(p) ((p)[0] + ((p)[1] << 8))
#define I32(p) (I16(p) + (I16((p)+2) << 16))
void
pnp_printf(u_int32_t id, char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
printf("%s: ", pnp_eisaformat(id));
vprintf(fmt, ap);
va_end(ap);
}
/* parse a single descriptor */
static int
pnp_parse_desc(device_t dev, u_char tag, u_char *res, int len,
struct isa_config *config, int ldn)
{
char buf[100];
u_int32_t id;
u_int32_t compat_id;
int temp;
id = isa_get_logicalid(dev);
if (PNP_RES_TYPE(tag) == 0) {
/* Small resource */
switch (PNP_SRES_NUM(tag)) {
case PNP_TAG_VERSION:
case PNP_TAG_VENDOR:
/* these descriptors are quietly ignored */
break;
case PNP_TAG_LOGICAL_DEVICE:
case PNP_TAG_START_DEPENDANT:
case PNP_TAG_END_DEPENDANT:
if (bootverbose)
pnp_printf(id, "unexpected small tag %d\n",
PNP_SRES_NUM(tag));
/* shouldn't happen; quit now */
return (1);
case PNP_TAG_COMPAT_DEVICE:
/*
* Got a compatible device id resource.
* Should keep a list of compat ids in the device.
*/
bcopy(res, &compat_id, 4);
if (isa_get_compatid(dev) == 0)
isa_set_compatid(dev, compat_id);
break;
case PNP_TAG_IRQ_FORMAT:
if (config->ic_nirq == ISA_NIRQ) {
pnp_printf(id, "too many irqs\n");
return (1);
}
if (I16(res) == 0) {
/* a null descriptor */
config->ic_irqmask[config->ic_nirq] = 0;
config->ic_nirq++;
break;
}
if (bootverbose)
pnp_printf(id, "adding irq mask %#02x\n",
I16(res));
config->ic_irqmask[config->ic_nirq] = I16(res);
config->ic_nirq++;
break;
case PNP_TAG_DMA_FORMAT:
if (config->ic_ndrq == ISA_NDRQ) {
pnp_printf(id, "too many drqs\n");
return (1);
}
if (res[0] == 0) {
/* a null descriptor */
config->ic_drqmask[config->ic_ndrq] = 0;
config->ic_ndrq++;
break;
}
if (bootverbose)
pnp_printf(id, "adding dma mask %#02x\n",
res[0]);
config->ic_drqmask[config->ic_ndrq] = res[0];
config->ic_ndrq++;
break;
case PNP_TAG_IO_RANGE:
if (config->ic_nport == ISA_NPORT) {
pnp_printf(id, "too many ports\n");
return (1);
}
if (res[6] == 0) {
/* a null descriptor */
config->ic_port[config->ic_nport].ir_start = 0;
config->ic_port[config->ic_nport].ir_end = 0;
config->ic_port[config->ic_nport].ir_size = 0;
config->ic_port[config->ic_nport].ir_align = 0;
config->ic_nport++;
break;
}
if (bootverbose) {
pnp_printf(id, "adding io range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
I16(res + 1),
I16(res + 3) + res[6]-1,
res[6], res[5]);
}
config->ic_port[config->ic_nport].ir_start =
I16(res + 1);
config->ic_port[config->ic_nport].ir_end =
I16(res + 3) + res[6] - 1;
config->ic_port[config->ic_nport].ir_size = res[6];
if (res[5] == 0) {
/* Make sure align is at least one */
res[5] = 1;
}
config->ic_port[config->ic_nport].ir_align = res[5];
config->ic_nport++;
pnp_check_quirks(isa_get_vendorid(dev),
isa_get_logicalid(dev), ldn, config);
break;
case PNP_TAG_IO_FIXED:
if (config->ic_nport == ISA_NPORT) {
pnp_printf(id, "too many ports\n");
return (1);
}
if (res[2] == 0) {
/* a null descriptor */
config->ic_port[config->ic_nport].ir_start = 0;
config->ic_port[config->ic_nport].ir_end = 0;
config->ic_port[config->ic_nport].ir_size = 0;
config->ic_port[config->ic_nport].ir_align = 0;
config->ic_nport++;
break;
}
if (bootverbose) {
pnp_printf(id, "adding fixed io range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
I16(res),
I16(res) + res[2] - 1,
res[2], 1);
}
config->ic_port[config->ic_nport].ir_start = I16(res);
config->ic_port[config->ic_nport].ir_end =
I16(res) + res[2] - 1;
config->ic_port[config->ic_nport].ir_size = res[2];
config->ic_port[config->ic_nport].ir_align = 1;
config->ic_nport++;
break;
case PNP_TAG_END:
if (bootverbose)
pnp_printf(id, "end config\n");
return (1);
default:
/* Skip this resource */
pnp_printf(id, "unexpected small tag %d\n",
PNP_SRES_NUM(tag));
break;
}
} else {
/* Large resource */
switch (PNP_LRES_NUM(tag)) {
case PNP_TAG_ID_UNICODE:
case PNP_TAG_LARGE_VENDOR:
/* these descriptors are quietly ignored */
break;
case PNP_TAG_ID_ANSI:
if (len > sizeof(buf) - 1)
len = sizeof(buf) - 1;
bcopy(res, buf, len);
/*
* Trim trailing spaces and garbage.
*/
while (len > 0 && buf[len - 1] <= ' ')
len--;
buf[len] = '\0';
device_set_desc_copy(dev, buf);
break;
case PNP_TAG_MEMORY_RANGE:
if (config->ic_nmem == ISA_NMEM) {
pnp_printf(id, "too many memory ranges\n");
return (1);
}
if (I16(res + 7) == 0) {
/* a null descriptor */
config->ic_mem[config->ic_nmem].ir_start = 0;
config->ic_mem[config->ic_nmem].ir_end = 0;
config->ic_mem[config->ic_nmem].ir_size = 0;
config->ic_mem[config->ic_nmem].ir_align = 0;
config->ic_nmem++;
break;
}
if (bootverbose) {
temp = I16(res + 7) << 8;
pnp_printf(id, "adding memory range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
I16(res + 1) << 8,
(I16(res + 3) << 8) + temp - 1,
temp, I16(res + 5));
}
config->ic_mem[config->ic_nmem].ir_start =
I16(res + 1) << 8;
config->ic_mem[config->ic_nmem].ir_end =
(I16(res + 3) << 8) + (I16(res + 7) << 8) - 1;
config->ic_mem[config->ic_nmem].ir_size =
I16(res + 7) << 8;
config->ic_mem[config->ic_nmem].ir_align = I16(res + 5);
if (!config->ic_mem[config->ic_nmem].ir_align)
config->ic_mem[config->ic_nmem].ir_align =
0x10000;
config->ic_nmem++;
break;
case PNP_TAG_MEMORY32_RANGE:
if (config->ic_nmem == ISA_NMEM) {
pnp_printf(id, "too many memory ranges\n");
return (1);
}
if (I32(res + 13) == 0) {
/* a null descriptor */
config->ic_mem[config->ic_nmem].ir_start = 0;
config->ic_mem[config->ic_nmem].ir_end = 0;
config->ic_mem[config->ic_nmem].ir_size = 0;
config->ic_mem[config->ic_nmem].ir_align = 0;
config->ic_nmem++;
break;
}
if (bootverbose) {
pnp_printf(id, "adding memory32 range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
I32(res + 1),
I32(res + 5) + I32(res + 13) - 1,
I32(res + 13), I32(res + 9));
}
config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
config->ic_mem[config->ic_nmem].ir_end =
I32(res + 5) + I32(res + 13) - 1;
config->ic_mem[config->ic_nmem].ir_size = I32(res + 13);
config->ic_mem[config->ic_nmem].ir_align = I32(res + 9);
config->ic_nmem++;
break;
case PNP_TAG_MEMORY32_FIXED:
if (config->ic_nmem == ISA_NMEM) {
pnp_printf(id, "too many memory ranges\n");
return (1);
}
if (I32(res + 5) == 0) {
/* a null descriptor */
config->ic_mem[config->ic_nmem].ir_start = 0;
config->ic_mem[config->ic_nmem].ir_end = 0;
config->ic_mem[config->ic_nmem].ir_size = 0;
config->ic_mem[config->ic_nmem].ir_align = 0;
break;
}
if (bootverbose) {
pnp_printf(id, "adding fixed memory32 range "
"%#x-%#x, size=%#x\n",
I32(res + 1),
I32(res + 1) + I32(res + 5) - 1,
I32(res + 5));
}
config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
config->ic_mem[config->ic_nmem].ir_end =
I32(res + 1) + I32(res + 5) - 1;
config->ic_mem[config->ic_nmem].ir_size = I32(res + 5);
config->ic_mem[config->ic_nmem].ir_align = 1;
config->ic_nmem++;
break;
default:
/* Skip this resource */
pnp_printf(id, "unexpected large tag %d\n",
PNP_SRES_NUM(tag));
break;
}
}
return (0);
}
/*
* Parse a single "dependent" resource combination.
*/
u_char
*pnp_parse_dependant(device_t dev, u_char *resources, int len,
struct isa_config *config, int ldn)
{
return pnp_scan_resources(dev, resources, len, config, ldn,
pnp_parse_desc);
}
static void
pnp_merge_resources(device_t dev, struct isa_config *from,
struct isa_config *to)
{
device_t parent;
int i;
parent = device_get_parent(dev);
for (i = 0; i < from->ic_nmem; i++) {
if (to->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges\n");
return;
}
to->ic_mem[to->ic_nmem] = from->ic_mem[i];
to->ic_nmem++;
}
for (i = 0; i < from->ic_nport; i++) {
if (to->ic_nport == ISA_NPORT) {
device_printf(parent, "too many port ranges\n");
return;
}
to->ic_port[to->ic_nport] = from->ic_port[i];
to->ic_nport++;
}
for (i = 0; i < from->ic_nirq; i++) {
if (to->ic_nirq == ISA_NIRQ) {
device_printf(parent, "too many irq ranges\n");
return;
}
to->ic_irqmask[to->ic_nirq] = from->ic_irqmask[i];
to->ic_nirq++;
}
for (i = 0; i < from->ic_ndrq; i++) {
if (to->ic_ndrq == ISA_NDRQ) {
device_printf(parent, "too many drq ranges\n");
return;
}
to->ic_drqmask[to->ic_ndrq] = from->ic_drqmask[i];
to->ic_ndrq++;
}
}
/*
* Parse resource data for Logical Devices, make a list of available
* resource configurations, and add them to the device.
*
* This function exits as soon as it gets an error reading *ANY*
* Resource Data or it reaches the end of Resource Data.
*/
void
pnp_parse_resources(device_t dev, u_char *resources, int len, int ldn)
{
struct isa_config *configs;
struct isa_config *config;
device_t parent;
int priorities[1 + MAXDEP];
u_char *start;
u_char *p;
u_char tag;
u_int32_t id;
int ncfgs;
int l;
int i;
parent = device_get_parent(dev);
id = isa_get_logicalid(dev);
configs = (struct isa_config *)malloc(sizeof(*configs)*(1 + MAXDEP),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (configs == NULL) {
device_printf(parent, "No memory to parse PNP data\n");
return;
}
config = &configs[0];
priorities[0] = 0;
ncfgs = 1;
p = resources;
start = NULL;
while (len > 0) {
tag = *p++;
len--;
if (PNP_RES_TYPE(tag) == 0) {
/* Small resource */
l = PNP_SRES_LEN(tag);
if (len < l) {
len = 0;
continue;
}
len -= l;
switch (PNP_SRES_NUM(tag)) {
case PNP_TAG_START_DEPENDANT:
if (start != NULL) {
/*
* Copy the common resources first,
* then parse the "dependent" resources.
*/
pnp_merge_resources(dev, &configs[0],
config);
pnp_parse_dependant(dev, start,
p - start - 1,
config, ldn);
}
start = p + l;
if (ncfgs > MAXDEP) {
device_printf(parent, "too many dependent configs (%d)\n", MAXDEP);
len = 0;
break;
}
config = &configs[ncfgs];
/*
* If the priority is not specified,
* then use the default of 'acceptable'
*/
if (l > 0)
priorities[ncfgs] = p[0];
else
priorities[ncfgs] = 1;
if (bootverbose)
pnp_printf(id, "start dependent (%d)\n",
priorities[ncfgs]);
ncfgs++;
break;
case PNP_TAG_END_DEPENDANT:
if (start == NULL) {
device_printf(parent,
"malformed resources\n");
len = 0;
break;
}
/*
* Copy the common resources first,
* then parse the "dependent" resources.
*/
pnp_merge_resources(dev, &configs[0], config);
pnp_parse_dependant(dev, start, p - start - 1,
config, ldn);
start = NULL;
if (bootverbose)
pnp_printf(id, "end dependent\n");
/*
* Back to the common part; clear it
* as its contents has already been copied
* to each dependant.
*/
config = &configs[0];
bzero(config, sizeof(*config));
break;
case PNP_TAG_END:
if (start != NULL) {
device_printf(parent,
"malformed resources\n");
}
len = 0;
break;
default:
if (start != NULL)
/* defer parsing a dependent section */
break;
if (pnp_parse_desc(dev, tag, p, l, config, ldn))
len = 0;
break;
}
p += l;
} else {
/* Large resource */
if (len < 2) {
len = 0;
break;
}
l = I16(p);
p += 2;
len -= 2;
if (len < l) {
len = 0;
break;
}
len -= l;
if (start == NULL &&
pnp_parse_desc(dev, tag, p, l, config, ldn)) {
len = 0;
break;
}
p += l;
}
}
if (ncfgs == 1) {
/* Single config without dependants */
ISA_ADD_CONFIG(parent, dev, priorities[0], &configs[0]);
free(configs, M_DEVBUF);
return;
}
for (i = 1; i < ncfgs; i++) {
/*
* Merge the remaining part of the common resources,
* if any. Strictly speaking, there shouldn't be common/main
* resources after the END_DEPENDENT tag.
*/
pnp_merge_resources(dev, &configs[0], &configs[i]);
ISA_ADD_CONFIG(parent, dev, priorities[i], &configs[i]);
}
free(configs, M_DEVBUF);
}
u_char
*pnp_scan_resources(device_t dev, u_char *resources, int len,
struct isa_config *config, int ldn, pnp_scan_cb *cb)
{
u_char *p;
u_char tag;
int l;
p = resources;
while (len > 0) {
tag = *p++;
len--;
if (PNP_RES_TYPE(tag) == 0) {
/* small resource */
l = PNP_SRES_LEN(tag);
if (len < l)
break;
if ((*cb)(dev, tag, p, l, config, ldn))
return (p + l);
if (PNP_SRES_NUM(tag) == PNP_TAG_END)
return (p + l);
} else {
/* large resource */
if (len < 2)
break;
l = I16(p);
p += 2;
len -= 2;
if (len < l)
break;
if ((*cb)(dev, tag, p, l, config, ldn))
return (p + l);
}
p += l;
len -= l;
}
return NULL;
}