bb2b9030e8
* Move pnp_eisaformat() to pnp.c, declared in <isa/pnpvar.h>. * Turn the pnpbios code into an enumerator for the isa bus. This allows all devices known to the bios to be probed automatically. Currently the pnpbios code is dependant on the PNPBIOS option. As the code is tested more and when more drivers are converted this will be made the default. I have PnP changes in the wings for fdc, atkbd, psm, pcaudio, and joy. Sio already works with pnpbios.
380 lines
9.8 KiB
C
380 lines
9.8 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/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 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 ir reaches the end of Resource Data. In the first
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* case the return value will be TRUE, FALSE otherwise.
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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 logdev, alt;
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struct isa_config *config;
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int priority = 0;
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int seenalt = 0;
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char buf[100];
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id = isa_get_logicalid(dev);
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bzero(&logdev, sizeof logdev);
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bzero(&alt, sizeof alt);
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config = &logdev;
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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");
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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");
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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 (config == &alt) {
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ISA_ADD_CONFIG(parent, dev,
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priority, config);
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} else if (config != &logdev) {
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device_printf(parent, "malformed\n");
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scanning = 0;
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break;
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}
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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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priority = resinfo[0];
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else
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priority = 1;
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alt = logdev;
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config = &alt;
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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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ISA_ADD_CONFIG(parent, dev, priority, config);
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config = &logdev;
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seenalt = 1;
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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");
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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 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");
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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: start dependant\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 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.
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*/
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while (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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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)
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+ I16(resinfo + 7) - 1,
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I16(resinfo + 7),
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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");
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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) - 1;
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config->ic_mem[config->ic_nmem].ir_size =
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I16(resinfo + 7);
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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 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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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");
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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 memory 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");
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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 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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/*
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* Some devices (e.g. network cards) don't have start
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* dependant tags and only have a single configuration. If we
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* finish parsing without seeing an end dependant tag, add the
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* non-dependant configuration to the device.
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*/
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if (!seenalt)
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ISA_ADD_CONFIG(parent, dev, 1, config);
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}
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