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c395939120
the following bugs. - When constructing a resource configuration, respect the order in which resource descriptors are read, in order to establish the correct mapping between the descriptors and configuration registers. "Plug and Play ISA Specification, Version 1.0a", Sec 4.6.1, May 5, 1994. "Clarifications to the Plug and Play ISA Specification, Version 1.0a", Sec 6.2.1, Dec. 10, 1994. - Do not ignore null (empty) descriptors; they are valid descriptors acting as filler. "Clarifications to the Plug and Play ISA Specification, Version 1.0a", Sec 6.2.1. - Correctly set up logical device configuration registers for null resources. "Clarifications to the Plug and Play ISA Specification, Version 1.0a" - Handle null resources properly in the resource allocator for the ISA bus.
605 lines
15 KiB
C
605 lines
15 KiB
C
/*-
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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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* $FreeBSD$
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*/
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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(u_int32_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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u_int32_t id;
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u_int32_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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u_int32_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 dependant 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");
|
|
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;
|
|
}
|