606 lines
15 KiB
C
606 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1999 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/stdarg.h>
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#include <isa/isavar.h>
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#include <isa/pnpreg.h>
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#include <isa/pnpvar.h>
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#define MAXDEP 8
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#define I16(p) ((p)[0] + ((p)[1] << 8))
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#define I32(p) (I16(p) + (I16((p)+2) << 16))
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void
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pnp_printf(uint32_t id, char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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printf("%s: ", pnp_eisaformat(id));
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vprintf(fmt, ap);
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va_end(ap);
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}
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/* parse a single descriptor */
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static int
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pnp_parse_desc(device_t dev, u_char tag, u_char *res, int len,
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struct isa_config *config, int ldn)
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{
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char buf[100];
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uint32_t id;
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uint32_t compat_id;
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int temp;
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id = isa_get_logicalid(dev);
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if (PNP_RES_TYPE(tag) == 0) {
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/* Small resource */
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switch (PNP_SRES_NUM(tag)) {
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case PNP_TAG_VERSION:
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case PNP_TAG_VENDOR:
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/* these descriptors are quietly ignored */
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break;
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case PNP_TAG_LOGICAL_DEVICE:
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case PNP_TAG_START_DEPENDANT:
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case PNP_TAG_END_DEPENDANT:
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if (bootverbose)
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pnp_printf(id, "unexpected small tag %d\n",
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PNP_SRES_NUM(tag));
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/* shouldn't happen; quit now */
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return (1);
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case PNP_TAG_COMPAT_DEVICE:
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/*
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* Got a compatible device id resource.
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* Should keep a list of compat ids in the device.
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*/
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bcopy(res, &compat_id, 4);
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if (isa_get_compatid(dev) == 0)
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isa_set_compatid(dev, compat_id);
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break;
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case PNP_TAG_IRQ_FORMAT:
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if (config->ic_nirq == ISA_NIRQ) {
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pnp_printf(id, "too many irqs\n");
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return (1);
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}
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if (I16(res) == 0) {
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/* a null descriptor */
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config->ic_irqmask[config->ic_nirq] = 0;
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config->ic_nirq++;
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break;
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}
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if (bootverbose)
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pnp_printf(id, "adding irq mask %#02x\n",
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I16(res));
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config->ic_irqmask[config->ic_nirq] = I16(res);
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config->ic_nirq++;
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break;
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case PNP_TAG_DMA_FORMAT:
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if (config->ic_ndrq == ISA_NDRQ) {
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pnp_printf(id, "too many drqs\n");
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return (1);
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}
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if (res[0] == 0) {
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/* a null descriptor */
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config->ic_drqmask[config->ic_ndrq] = 0;
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config->ic_ndrq++;
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break;
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}
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if (bootverbose)
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pnp_printf(id, "adding dma mask %#02x\n",
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res[0]);
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config->ic_drqmask[config->ic_ndrq] = res[0];
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config->ic_ndrq++;
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break;
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case PNP_TAG_IO_RANGE:
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if (config->ic_nport == ISA_NPORT) {
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pnp_printf(id, "too many ports\n");
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return (1);
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}
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if (res[6] == 0) {
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/* a null descriptor */
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config->ic_port[config->ic_nport].ir_start = 0;
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config->ic_port[config->ic_nport].ir_end = 0;
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config->ic_port[config->ic_nport].ir_size = 0;
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config->ic_port[config->ic_nport].ir_align = 0;
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config->ic_nport++;
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break;
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}
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if (bootverbose) {
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pnp_printf(id, "adding io range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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I16(res + 1),
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I16(res + 3) + res[6]-1,
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res[6], res[5]);
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}
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config->ic_port[config->ic_nport].ir_start =
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I16(res + 1);
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config->ic_port[config->ic_nport].ir_end =
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I16(res + 3) + res[6] - 1;
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config->ic_port[config->ic_nport].ir_size = res[6];
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if (res[5] == 0) {
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/* Make sure align is at least one */
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res[5] = 1;
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}
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config->ic_port[config->ic_nport].ir_align = res[5];
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config->ic_nport++;
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pnp_check_quirks(isa_get_vendorid(dev),
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isa_get_logicalid(dev), ldn, config);
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break;
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case PNP_TAG_IO_FIXED:
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if (config->ic_nport == ISA_NPORT) {
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pnp_printf(id, "too many ports\n");
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return (1);
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}
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if (res[2] == 0) {
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/* a null descriptor */
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config->ic_port[config->ic_nport].ir_start = 0;
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config->ic_port[config->ic_nport].ir_end = 0;
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config->ic_port[config->ic_nport].ir_size = 0;
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config->ic_port[config->ic_nport].ir_align = 0;
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config->ic_nport++;
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break;
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}
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if (bootverbose) {
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pnp_printf(id, "adding fixed io range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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I16(res),
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I16(res) + res[2] - 1,
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res[2], 1);
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}
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config->ic_port[config->ic_nport].ir_start = I16(res);
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config->ic_port[config->ic_nport].ir_end =
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I16(res) + res[2] - 1;
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config->ic_port[config->ic_nport].ir_size = res[2];
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config->ic_port[config->ic_nport].ir_align = 1;
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config->ic_nport++;
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break;
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case PNP_TAG_END:
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if (bootverbose)
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pnp_printf(id, "end config\n");
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return (1);
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default:
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/* Skip this resource */
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pnp_printf(id, "unexpected small tag %d\n",
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PNP_SRES_NUM(tag));
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break;
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}
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} else {
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/* Large resource */
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switch (PNP_LRES_NUM(tag)) {
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case PNP_TAG_ID_UNICODE:
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case PNP_TAG_LARGE_VENDOR:
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/* these descriptors are quietly ignored */
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break;
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case PNP_TAG_ID_ANSI:
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if (len > sizeof(buf) - 1)
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len = sizeof(buf) - 1;
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bcopy(res, buf, len);
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/*
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* Trim trailing spaces and garbage.
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*/
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while (len > 0 && buf[len - 1] <= ' ')
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len--;
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buf[len] = '\0';
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device_set_desc_copy(dev, buf);
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break;
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case PNP_TAG_MEMORY_RANGE:
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if (config->ic_nmem == ISA_NMEM) {
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pnp_printf(id, "too many memory ranges\n");
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return (1);
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}
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if (I16(res + 7) == 0) {
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/* a null descriptor */
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config->ic_mem[config->ic_nmem].ir_start = 0;
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config->ic_mem[config->ic_nmem].ir_end = 0;
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config->ic_mem[config->ic_nmem].ir_size = 0;
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config->ic_mem[config->ic_nmem].ir_align = 0;
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config->ic_nmem++;
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break;
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}
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if (bootverbose) {
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temp = I16(res + 7) << 8;
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pnp_printf(id, "adding memory range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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I16(res + 1) << 8,
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(I16(res + 3) << 8) + temp - 1,
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temp, I16(res + 5));
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}
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config->ic_mem[config->ic_nmem].ir_start =
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I16(res + 1) << 8;
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config->ic_mem[config->ic_nmem].ir_end =
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(I16(res + 3) << 8) + (I16(res + 7) << 8) - 1;
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config->ic_mem[config->ic_nmem].ir_size =
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I16(res + 7) << 8;
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config->ic_mem[config->ic_nmem].ir_align = I16(res + 5);
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if (!config->ic_mem[config->ic_nmem].ir_align)
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config->ic_mem[config->ic_nmem].ir_align =
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0x10000;
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config->ic_nmem++;
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break;
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case PNP_TAG_MEMORY32_RANGE:
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if (config->ic_nmem == ISA_NMEM) {
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pnp_printf(id, "too many memory ranges\n");
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return (1);
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}
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if (I32(res + 13) == 0) {
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/* a null descriptor */
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config->ic_mem[config->ic_nmem].ir_start = 0;
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config->ic_mem[config->ic_nmem].ir_end = 0;
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config->ic_mem[config->ic_nmem].ir_size = 0;
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config->ic_mem[config->ic_nmem].ir_align = 0;
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config->ic_nmem++;
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break;
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}
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if (bootverbose) {
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pnp_printf(id, "adding memory32 range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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I32(res + 1),
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I32(res + 5) + I32(res + 13) - 1,
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I32(res + 13), I32(res + 9));
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}
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config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
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config->ic_mem[config->ic_nmem].ir_end =
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I32(res + 5) + I32(res + 13) - 1;
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config->ic_mem[config->ic_nmem].ir_size = I32(res + 13);
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config->ic_mem[config->ic_nmem].ir_align = I32(res + 9);
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config->ic_nmem++;
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break;
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case PNP_TAG_MEMORY32_FIXED:
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if (config->ic_nmem == ISA_NMEM) {
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pnp_printf(id, "too many memory ranges\n");
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return (1);
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}
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if (I32(res + 5) == 0) {
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/* a null descriptor */
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config->ic_mem[config->ic_nmem].ir_start = 0;
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config->ic_mem[config->ic_nmem].ir_end = 0;
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config->ic_mem[config->ic_nmem].ir_size = 0;
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config->ic_mem[config->ic_nmem].ir_align = 0;
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break;
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}
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if (bootverbose) {
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pnp_printf(id, "adding fixed memory32 range "
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"%#x-%#x, size=%#x\n",
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I32(res + 1),
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I32(res + 1) + I32(res + 5) - 1,
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I32(res + 5));
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}
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config->ic_mem[config->ic_nmem].ir_start = I32(res + 1);
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config->ic_mem[config->ic_nmem].ir_end =
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I32(res + 1) + I32(res + 5) - 1;
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config->ic_mem[config->ic_nmem].ir_size = I32(res + 5);
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config->ic_mem[config->ic_nmem].ir_align = 1;
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config->ic_nmem++;
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break;
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default:
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/* Skip this resource */
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pnp_printf(id, "unexpected large tag %d\n",
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PNP_SRES_NUM(tag));
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break;
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}
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}
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return (0);
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}
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/*
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* Parse a single "dependent" resource combination.
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*/
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u_char
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*pnp_parse_dependant(device_t dev, u_char *resources, int len,
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struct isa_config *config, int ldn)
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{
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return pnp_scan_resources(dev, resources, len, config, ldn,
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pnp_parse_desc);
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}
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static void
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pnp_merge_resources(device_t dev, struct isa_config *from,
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struct isa_config *to)
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{
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device_t parent;
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int i;
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parent = device_get_parent(dev);
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for (i = 0; i < from->ic_nmem; i++) {
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if (to->ic_nmem == ISA_NMEM) {
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device_printf(parent, "too many memory ranges\n");
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return;
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}
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to->ic_mem[to->ic_nmem] = from->ic_mem[i];
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to->ic_nmem++;
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}
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for (i = 0; i < from->ic_nport; i++) {
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if (to->ic_nport == ISA_NPORT) {
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device_printf(parent, "too many port ranges\n");
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return;
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}
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to->ic_port[to->ic_nport] = from->ic_port[i];
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to->ic_nport++;
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}
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for (i = 0; i < from->ic_nirq; i++) {
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if (to->ic_nirq == ISA_NIRQ) {
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device_printf(parent, "too many irq ranges\n");
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return;
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}
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to->ic_irqmask[to->ic_nirq] = from->ic_irqmask[i];
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to->ic_nirq++;
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}
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for (i = 0; i < from->ic_ndrq; i++) {
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if (to->ic_ndrq == ISA_NDRQ) {
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device_printf(parent, "too many drq ranges\n");
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return;
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}
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to->ic_drqmask[to->ic_ndrq] = from->ic_drqmask[i];
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to->ic_ndrq++;
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}
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}
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/*
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* Parse resource data for Logical Devices, make a list of available
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* resource configurations, and add them to the device.
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*
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* This function exits as soon as it gets an error reading *ANY*
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* Resource Data or it reaches the end of Resource Data.
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*/
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void
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pnp_parse_resources(device_t dev, u_char *resources, int len, int ldn)
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{
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struct isa_config *configs;
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struct isa_config *config;
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device_t parent;
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int priorities[1 + MAXDEP];
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u_char *start;
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u_char *p;
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u_char tag;
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uint32_t id;
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int ncfgs;
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int l;
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int i;
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parent = device_get_parent(dev);
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id = isa_get_logicalid(dev);
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configs = (struct isa_config *)malloc(sizeof(*configs)*(1 + MAXDEP),
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M_DEVBUF, M_NOWAIT | M_ZERO);
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if (configs == NULL) {
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device_printf(parent, "No memory to parse PNP data\n");
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return;
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}
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config = &configs[0];
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priorities[0] = 0;
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ncfgs = 1;
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p = resources;
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start = NULL;
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while (len > 0) {
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tag = *p++;
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len--;
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if (PNP_RES_TYPE(tag) == 0) {
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/* Small resource */
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l = PNP_SRES_LEN(tag);
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if (len < l) {
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len = 0;
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continue;
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}
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len -= l;
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switch (PNP_SRES_NUM(tag)) {
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case PNP_TAG_START_DEPENDANT:
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if (start != NULL) {
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/*
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* Copy the common resources first,
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* then parse the "dependent" resources.
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*/
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pnp_merge_resources(dev, &configs[0],
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config);
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pnp_parse_dependant(dev, start,
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p - start - 1,
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config, ldn);
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}
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start = p + l;
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if (ncfgs > MAXDEP) {
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device_printf(parent, "too many dependent configs (%d)\n", MAXDEP);
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len = 0;
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break;
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}
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config = &configs[ncfgs];
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/*
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* If the priority is not specified,
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* then use the default of 'acceptable'
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*/
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if (l > 0)
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priorities[ncfgs] = p[0];
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else
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priorities[ncfgs] = 1;
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if (bootverbose)
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pnp_printf(id, "start dependent (%d)\n",
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priorities[ncfgs]);
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ncfgs++;
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break;
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case PNP_TAG_END_DEPENDANT:
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if (start == NULL) {
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device_printf(parent,
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"malformed resources\n");
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len = 0;
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break;
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}
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/*
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* Copy the common resources first,
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* then parse the "dependent" resources.
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*/
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pnp_merge_resources(dev, &configs[0], config);
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pnp_parse_dependant(dev, start, p - start - 1,
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config, ldn);
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start = NULL;
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if (bootverbose)
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pnp_printf(id, "end dependent\n");
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/*
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|
* Back to the common part; clear it
|
|
* as its contents has already been copied
|
|
* to each dependent.
|
|
*/
|
|
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;
|
|
}
|