424 lines
11 KiB
C
424 lines
11 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/kernel.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 <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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/*
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* Parse resource data for Logical Devices.
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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)
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{
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device_t parent = device_get_parent(dev);
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u_char tag, *resp, *resinfo;
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int large_len, scanning = len;
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u_int32_t id, compat_id;
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struct isa_config *config;
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int ncfgs = 1;
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int priorities[1 + MAXDEP];
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struct isa_config *configs;
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char buf[100];
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int i;
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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);
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if (configs == NULL) {
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device_printf(dev, "No memory to parse PNP data\n");
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return;
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}
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bzero(configs, sizeof(*configs) * (1 + MAXDEP));
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config = &configs[0];
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priorities[0] = 0;
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resp = resources;
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while (scanning > 0) {
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tag = *resp++;
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scanning--;
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if (PNP_RES_TYPE(tag) == 0) {
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/* Small resource */
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if (scanning < PNP_SRES_LEN(tag)) {
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scanning = 0;
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continue;
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}
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resinfo = resp;
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resp += PNP_SRES_LEN(tag);
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scanning -= PNP_SRES_LEN(tag);;
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switch (PNP_SRES_NUM(tag)) {
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case PNP_TAG_COMPAT_DEVICE:
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/*
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* Got a compatible device id
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* resource. Should keep a list of
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* compat ids in the device.
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*/
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bcopy(resinfo, &compat_id, 4);
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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 (bootverbose) {
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printf("%s: adding irq mask %#04x\n",
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pnp_eisaformat(id),
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I16(resinfo));
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}
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if (config->ic_nirq == ISA_NIRQ) {
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device_printf(parent, "too many irqs\n");
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scanning = 0;
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break;
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}
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config->ic_irqmask[config->ic_nirq] =
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I16(resinfo);
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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 (bootverbose) {
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printf("%s: adding dma mask %#02x\n",
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pnp_eisaformat(id),
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resinfo[0]);
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}
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if (config->ic_ndrq == ISA_NDRQ) {
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device_printf(parent, "too many drqs\n");
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scanning = 0;
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break;
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}
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config->ic_drqmask[config->ic_ndrq] =
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resinfo[0];
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config->ic_ndrq++;
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break;
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case PNP_TAG_START_DEPENDANT:
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if (bootverbose) {
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printf("%s: start dependant\n",
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pnp_eisaformat(id));
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}
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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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scanning = 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
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* 'acceptable'
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*/
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if (PNP_SRES_LEN(tag) > 0)
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priorities[ncfgs] = resinfo[0];
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else
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priorities[ncfgs] = 1;
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ncfgs++;
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break;
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case PNP_TAG_END_DEPENDANT:
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if (bootverbose) {
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printf("%s: end dependant\n",
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pnp_eisaformat(id));
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}
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config = &configs[0]; /* back to main config */
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break;
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case PNP_TAG_IO_RANGE:
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if (bootverbose) {
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printf("%s: adding io range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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pnp_eisaformat(id),
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I16(resinfo + 1),
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I16(resinfo + 3) + resinfo[6]-1,
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resinfo[6],
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resinfo[5]);
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}
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if (config->ic_nport == ISA_NPORT) {
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device_printf(parent, "too many ports\n");
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scanning = 0;
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break;
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}
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config->ic_port[config->ic_nport].ir_start =
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I16(resinfo + 1);
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config->ic_port[config->ic_nport].ir_end =
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I16(resinfo + 3) + resinfo[6] - 1;
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config->ic_port[config->ic_nport].ir_size =
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resinfo[6];
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if (resinfo[5] == 0) {
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/* Make sure align is at least one */
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resinfo[5] = 1;
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}
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config->ic_port[config->ic_nport].ir_align =
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resinfo[5];
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config->ic_nport++;
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break;
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case PNP_TAG_IO_FIXED:
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if (bootverbose) {
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printf("%s: adding fixed io range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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pnp_eisaformat(id),
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I16(resinfo),
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I16(resinfo) + resinfo[2] - 1,
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resinfo[2],
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1);
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}
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if (config->ic_nport == ISA_NPORT) {
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device_printf(parent, "too many ports\n");
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scanning = 0;
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break;
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}
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config->ic_port[config->ic_nport].ir_start =
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I16(resinfo);
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config->ic_port[config->ic_nport].ir_end =
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I16(resinfo) + resinfo[2] - 1;
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config->ic_port[config->ic_nport].ir_size
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= resinfo[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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printf("%s: end config\n",
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pnp_eisaformat(id));
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}
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scanning = 0;
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break;
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default:
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/* Skip this resource */
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device_printf(parent, "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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if (scanning < 2) {
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scanning = 0;
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continue;
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}
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large_len = I16(resp);
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resp += 2;
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scanning -= 2;
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if (scanning < large_len) {
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scanning = 0;
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continue;
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}
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resinfo = resp;
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resp += large_len;
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scanning -= large_len;
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switch (PNP_LRES_NUM(tag)) {
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case PNP_TAG_ID_ANSI:
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if (large_len > sizeof(buf) - 1)
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large_len = sizeof(buf) - 1;
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bcopy(resinfo, buf, large_len);
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/*
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* Trim trailing spaces and garbage.
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*/
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while (large_len > 0 && buf[large_len - 1] <= ' ')
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large_len--;
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buf[large_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 (bootverbose) {
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int temp = I16(resinfo + 7) << 8;
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printf("%s: adding memory range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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pnp_eisaformat(id),
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I16(resinfo + 1)<<8,
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(I16(resinfo + 3)<<8) + temp - 1,
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temp,
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I16(resinfo + 5));
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}
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if (config->ic_nmem == ISA_NMEM) {
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device_printf(parent, "too many memory ranges\n");
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scanning = 0;
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break;
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}
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config->ic_mem[config->ic_nmem].ir_start =
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I16(resinfo + 1)<<8;
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config->ic_mem[config->ic_nmem].ir_end =
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(I16(resinfo + 3)<<8)
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+ (I16(resinfo + 7) << 8) - 1;
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config->ic_mem[config->ic_nmem].ir_size =
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I16(resinfo + 7) << 8;
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config->ic_mem[config->ic_nmem].ir_align =
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I16(resinfo + 5);
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if (!config->ic_mem[config->ic_nmem].ir_align)
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config->ic_mem[config->ic_nmem]
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.ir_align = 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 (bootverbose) {
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printf("%s: adding memory32 range "
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"%#x-%#x, size=%#x, "
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"align=%#x\n",
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pnp_eisaformat(id),
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I32(resinfo + 1),
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I32(resinfo + 5)
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+ I32(resinfo + 13) - 1,
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I32(resinfo + 13),
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I32(resinfo + 9));
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}
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if (config->ic_nmem == ISA_NMEM) {
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device_printf(parent, "too many memory ranges\n");
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scanning = 0;
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break;
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}
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config->ic_mem[config->ic_nmem].ir_start =
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I32(resinfo + 1);
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config->ic_mem[config->ic_nmem].ir_end =
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I32(resinfo + 5)
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+ I32(resinfo + 13) - 1;
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config->ic_mem[config->ic_nmem].ir_size =
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I32(resinfo + 13);
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config->ic_mem[config->ic_nmem].ir_align =
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I32(resinfo + 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 (I32(resinfo + 5) == 0) {
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if (bootverbose) {
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printf("%s: skipping empty range\n",
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pnp_eisaformat(id));
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}
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continue;
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}
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if (bootverbose) {
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printf("%s: adding fixed memory32 range "
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"%#x-%#x, size=%#x\n",
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pnp_eisaformat(id),
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I32(resinfo + 1),
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I32(resinfo + 1)
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+ I32(resinfo + 5) - 1,
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I32(resinfo + 5));
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}
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if (config->ic_nmem == ISA_NMEM) {
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device_printf(parent, "too many memory ranges\n");
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scanning = 0;
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break;
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}
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config->ic_mem[config->ic_nmem].ir_start =
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I32(resinfo + 1);
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config->ic_mem[config->ic_nmem].ir_end =
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I32(resinfo + 1)
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+ I32(resinfo + 5) - 1;
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config->ic_mem[config->ic_nmem].ir_size =
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I32(resinfo + 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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device_printf(parent, "unexpected large tag %d\n",
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PNP_SRES_NUM(tag));
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}
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}
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}
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if(ncfgs == 1) {
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/* Single config without dependants */
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(void)ISA_ADD_CONFIG(parent, dev, priorities[0], &configs[0]);
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free(configs, M_DEVBUF);
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return;
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}
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/* Cycle through dependant configs merging primary details */
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for(i = 1; i < ncfgs; i++) {
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int j;
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config = &configs[i];
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for(j = 0; j < configs[0].ic_nmem; j++) {
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if (config->ic_nmem == ISA_NMEM) {
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device_printf(parent, "too many memory ranges\n");
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free(configs, M_DEVBUF);
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return;
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}
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config->ic_mem[config->ic_nmem] = configs[0].ic_mem[j];
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config->ic_nmem++;
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}
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for(j = 0; j < configs[0].ic_nport; j++) {
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if (config->ic_nport == ISA_NPORT) {
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device_printf(parent, "too many port ranges\n");
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free(configs, M_DEVBUF);
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return;
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}
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config->ic_port[config->ic_nport] = configs[0].ic_port[j];
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config->ic_nport++;
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}
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for(j = 0; j < configs[0].ic_nirq; j++) {
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if (config->ic_nirq == ISA_NIRQ) {
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device_printf(parent, "too many irq ranges\n");
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free(configs, M_DEVBUF);
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return;
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}
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config->ic_irqmask[config->ic_nirq] = configs[0].ic_irqmask[j];
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config->ic_nirq++;
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}
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for(j = 0; j < configs[0].ic_ndrq; j++) {
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if (config->ic_ndrq == ISA_NDRQ) {
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device_printf(parent, "too many drq ranges\n");
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free(configs, M_DEVBUF);
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return;
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}
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config->ic_drqmask[config->ic_ndrq] = configs[0].ic_drqmask[j];
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config->ic_ndrq++;
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}
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(void)ISA_ADD_CONFIG(parent, dev, priorities[i], &configs[i]);
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}
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free(configs, M_DEVBUF);
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}
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