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freebsd-skq/sys/isa/pnpparse.c
Mike Smith 847166ca5a Ignore resources with a size of 0, as these are disabled (and we don't 
deal with them properly elsewhere).

Submitted by:	Masayuki FUKUI <fukui@sonic.nm.fujitsu.co.jp>
2000-11-07 00:03:33 +00:00

435 lines
11 KiB
C
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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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.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))
/*
* Parse resource data for Logical Devices.
*
* 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, u_int32_t vendor_id, u_int32_t logical_id, int ldn)
{
device_t parent = device_get_parent(dev);
u_char tag, *resp, *resinfo;
int large_len, scanning = len;
u_int32_t id, compat_id;
struct isa_config *config;
int ncfgs = 1;
int priorities[1 + MAXDEP];
struct isa_config *configs;
char buf[100];
int i;
id = isa_get_logicalid(dev);
configs = (struct isa_config *)malloc(sizeof(*configs) * (1 + MAXDEP),
M_DEVBUF, M_NOWAIT);
if (configs == NULL) {
device_printf(dev, "No memory to parse PNP data\n");
return;
}
bzero(configs, sizeof(*configs) * (1 + MAXDEP));
config = &configs[0];
priorities[0] = 0;
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 (!I16(resinfo))
break;
if (bootverbose) {
printf("%s: adding irq mask %#02x\n",
pnp_eisaformat(id),
I16(resinfo));
}
if (config->ic_nirq == ISA_NIRQ) {
device_printf(parent, "too many irqs\n");
scanning = 0;
break;
}
config->ic_irqmask[config->ic_nirq] =
I16(resinfo);
config->ic_nirq++;
break;
case PNP_TAG_DMA_FORMAT:
if (bootverbose) {
printf("%s: adding dma mask %#02x\n",
pnp_eisaformat(id),
resinfo[0]);
}
if (config->ic_ndrq == ISA_NDRQ) {
device_printf(parent, "too many drqs\n");
scanning = 0;
break;
}
config->ic_drqmask[config->ic_ndrq] =
resinfo[0];
config->ic_ndrq++;
break;
case PNP_TAG_START_DEPENDANT:
if (bootverbose) {
printf("%s: start dependant\n",
pnp_eisaformat(id));
}
if (ncfgs > MAXDEP) {
device_printf(parent, "too many dependant configs (%d)\n", MAXDEP);
scanning = 0;
break;
}
config = &configs[ncfgs];
/*
* If the priority is not specified,
* then use the default of
* 'acceptable'
*/
if (PNP_SRES_LEN(tag) > 0)
priorities[ncfgs] = resinfo[0];
else
priorities[ncfgs] = 1;
ncfgs++;
break;
case PNP_TAG_END_DEPENDANT:
if (bootverbose) {
printf("%s: end dependant\n",
pnp_eisaformat(id));
}
config = &configs[0]; /* back to main config */
break;
case PNP_TAG_IO_RANGE:
if (bootverbose) {
printf("%s: adding io range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
pnp_eisaformat(id),
I16(resinfo + 1),
I16(resinfo + 3) + resinfo[6]-1,
resinfo[6],
resinfo[5]);
}
if (config->ic_nport == ISA_NPORT) {
device_printf(parent, "too many ports\n");
scanning = 0;
break;
}
config->ic_port[config->ic_nport].ir_start =
I16(resinfo + 1);
config->ic_port[config->ic_nport].ir_end =
I16(resinfo + 3) + resinfo[6] - 1;
config->ic_port[config->ic_nport].ir_size =
resinfo[6];
if (resinfo[5] == 0) {
/* Make sure align is at least one */
resinfo[5] = 1;
}
config->ic_port[config->ic_nport].ir_align =
resinfo[5];
config->ic_nport++;
pnp_check_quirks(vendor_id,
logical_id,
ldn, config);
break;
case PNP_TAG_IO_FIXED:
if (bootverbose) {
printf("%s: adding fixed io range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
pnp_eisaformat(id),
I16(resinfo),
I16(resinfo) + resinfo[2] - 1,
resinfo[2],
1);
}
if (config->ic_nport == ISA_NPORT) {
device_printf(parent, "too many ports\n");
scanning = 0;
break;
}
config->ic_port[config->ic_nport].ir_start =
I16(resinfo);
config->ic_port[config->ic_nport].ir_end =
I16(resinfo) + 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 (bootverbose) {
printf("%s: end config\n",
pnp_eisaformat(id));
}
scanning = 0;
break;
default:
/* Skip this resource */
device_printf(parent, "unexpected small tag %d\n",
PNP_SRES_NUM(tag));
break;
}
} else {
/* Large resource */
if (scanning < 2) {
scanning = 0;
continue;
}
large_len = I16(resp);
resp += 2;
scanning -= 2;
if (scanning < large_len) {
scanning = 0;
continue;
}
resinfo = resp;
resp += large_len;
scanning -= large_len;
switch (PNP_LRES_NUM(tag)) {
case PNP_TAG_ID_ANSI:
if (large_len > sizeof(buf) - 1)
large_len = sizeof(buf) - 1;
bcopy(resinfo, buf, large_len);
/*
* Trim trailing spaces and garbage.
*/
while (large_len > 0 && buf[large_len - 1] <= ' ')
large_len--;
buf[large_len] = '\0';
device_set_desc_copy(dev, buf);
break;
case PNP_TAG_MEMORY_RANGE:
if (bootverbose) {
int temp = I16(resinfo + 7) << 8;
printf("%s: adding memory range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
pnp_eisaformat(id),
I16(resinfo + 1)<<8,
(I16(resinfo + 3)<<8) + temp - 1,
temp,
I16(resinfo + 5));
}
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges\n");
scanning = 0;
break;
}
config->ic_mem[config->ic_nmem].ir_start =
I16(resinfo + 1)<<8;
config->ic_mem[config->ic_nmem].ir_end =
(I16(resinfo + 3)<<8)
+ (I16(resinfo + 7) << 8) - 1;
config->ic_mem[config->ic_nmem].ir_size =
I16(resinfo + 7) << 8;
config->ic_mem[config->ic_nmem].ir_align =
I16(resinfo + 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 (I32(resinfo + 13) == 0) {
if (bootverbose) {
printf("%s: skipping empty range\n",
pnp_eisaformat(id));
}
continue;
}
if (bootverbose) {
printf("%s: adding memory32 range "
"%#x-%#x, size=%#x, "
"align=%#x\n",
pnp_eisaformat(id),
I32(resinfo + 1),
I32(resinfo + 5)
+ I32(resinfo + 13) - 1,
I32(resinfo + 13),
I32(resinfo + 9));
}
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges\n");
scanning = 0;
break;
}
config->ic_mem[config->ic_nmem].ir_start =
I32(resinfo + 1);
config->ic_mem[config->ic_nmem].ir_end =
I32(resinfo + 5)
+ I32(resinfo + 13) - 1;
config->ic_mem[config->ic_nmem].ir_size =
I32(resinfo + 13);
config->ic_mem[config->ic_nmem].ir_align =
I32(resinfo + 9);
config->ic_nmem++;
break;
case PNP_TAG_MEMORY32_FIXED:
if (I32(resinfo + 5) == 0) {
if (bootverbose) {
printf("%s: skipping empty range\n",
pnp_eisaformat(id));
}
continue;
}
if (bootverbose) {
printf("%s: adding fixed memory32 range "
"%#x-%#x, size=%#x\n",
pnp_eisaformat(id),
I32(resinfo + 1),
I32(resinfo + 1)
+ I32(resinfo + 5) - 1,
I32(resinfo + 5));
}
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges\n");
scanning = 0;
break;
}
config->ic_mem[config->ic_nmem].ir_start =
I32(resinfo + 1);
config->ic_mem[config->ic_nmem].ir_end =
I32(resinfo + 1)
+ I32(resinfo + 5) - 1;
config->ic_mem[config->ic_nmem].ir_size =
I32(resinfo + 5);
config->ic_mem[config->ic_nmem].ir_align = 1;
config->ic_nmem++;
break;
default:
/* Skip this resource */
device_printf(parent, "unexpected large tag %d\n",
PNP_SRES_NUM(tag));
}
}
}
if(ncfgs == 1) {
/* Single config without dependants */
(void)ISA_ADD_CONFIG(parent, dev, priorities[0], &configs[0]);
free(configs, M_DEVBUF);
return;
}
/* Cycle through dependant configs merging primary details */
for(i = 1; i < ncfgs; i++) {
int j;
config = &configs[i];
for(j = 0; j < configs[0].ic_nmem; j++) {
if (config->ic_nmem == ISA_NMEM) {
device_printf(parent, "too many memory ranges\n");
free(configs, M_DEVBUF);
return;
}
config->ic_mem[config->ic_nmem] = configs[0].ic_mem[j];
config->ic_nmem++;
}
for(j = 0; j < configs[0].ic_nport; j++) {
if (config->ic_nport == ISA_NPORT) {
device_printf(parent, "too many port ranges\n");
free(configs, M_DEVBUF);
return;
}
config->ic_port[config->ic_nport] = configs[0].ic_port[j];
config->ic_nport++;
}
for(j = 0; j < configs[0].ic_nirq; j++) {
if (config->ic_nirq == ISA_NIRQ) {
device_printf(parent, "too many irq ranges\n");
free(configs, M_DEVBUF);
return;
}
config->ic_irqmask[config->ic_nirq] = configs[0].ic_irqmask[j];
config->ic_nirq++;
}
for(j = 0; j < configs[0].ic_ndrq; j++) {
if (config->ic_ndrq == ISA_NDRQ) {
device_printf(parent, "too many drq ranges\n");
free(configs, M_DEVBUF);
return;
}
config->ic_drqmask[config->ic_ndrq] = configs[0].ic_drqmask[j];
config->ic_ndrq++;
}
(void)ISA_ADD_CONFIG(parent, dev, priorities[i], &configs[i]);
}
free(configs, M_DEVBUF);
}
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