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969947cbe7
hole, so call them ISA Options rom(s).
186 lines
5.0 KiB
C
186 lines
5.0 KiB
C
/*-
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* Copyright (c) 2000 Nikolai Saoukh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Driver to take care of holes in ISA I/O memory occupied
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* by option rom(s)
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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/socket.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <isa/pnpvar.h>
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#define IOMEM_START 0x0a0000
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#define IOMEM_STEP 0x000800
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#define IOMEM_END 0x100000
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#define ORM_ID 0x00004d3e
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static struct isa_pnp_id orm_ids[] = {
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{ ORM_ID, NULL }, /* ORM0000 */
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{ 0, NULL },
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};
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#define MAX_ROMS 16
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struct orm_softc {
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int rnum;
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int rid[MAX_ROMS];
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struct resource *res[MAX_ROMS];
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};
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static int
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orm_probe(device_t dev)
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{
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return (ISA_PNP_PROBE(device_get_parent(dev), dev, orm_ids));
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}
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static int
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orm_attach(device_t dev)
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{
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return (0);
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}
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static void
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orm_identify(driver_t* driver, device_t parent)
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{
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bus_space_handle_t bh;
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bus_space_tag_t bt;
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device_t child;
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u_int32_t chunk = IOMEM_START;
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struct resource *res;
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int rid;
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u_int32_t rom_size;
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struct orm_softc *sc;
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u_int8_t buf[3];
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child = BUS_ADD_CHILD(parent, ISA_ORDER_SENSITIVE, "orm", -1);
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device_set_driver(child, driver);
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isa_set_logicalid(child, ORM_ID);
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isa_set_vendorid(child, ORM_ID);
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sc = device_get_softc(child);
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sc->rnum = 0;
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while (chunk < IOMEM_END) {
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bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, chunk,
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IOMEM_STEP);
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rid = sc->rnum;
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res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (res == NULL) {
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bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
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chunk += IOMEM_STEP;
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continue;
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}
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bt = rman_get_bustag(res);
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bh = rman_get_bushandle(res);
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bus_space_read_region_1(bt, bh, 0, buf, sizeof(buf));
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/*
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* We need to release and delete the resource since we're
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* changing its size, or the rom isn't there. There
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* is a checksum field in the ROM to prevent false
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* positives. However, some common hardware (IBM thinkpads)
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* neglects to put a valid checksum in the ROM, so we do
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* not double check the checksum here. On the ISA bus
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* areas that have no hardware read back as 0xff, so the
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* tests to see if we have 0x55 followed by 0xaa are
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* generally sufficient.
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*/
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bus_release_resource(child, SYS_RES_MEMORY, rid, res);
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bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
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if (buf[0] != 0x55 || buf[1] != 0xAA || (buf[2] & 0x03) != 0) {
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chunk += IOMEM_STEP;
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continue;
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}
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rom_size = buf[2] << 9;
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bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, chunk,
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rom_size);
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rid = sc->rnum;
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res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0);
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if (res == NULL) {
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bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
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chunk += IOMEM_STEP;
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continue;
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}
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sc->rid[sc->rnum] = rid;
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sc->res[sc->rnum] = res;
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sc->rnum++;
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chunk += rom_size;
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}
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if (sc->rnum == 0)
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device_delete_child(parent, child);
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else if (sc->rnum == 1)
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device_set_desc(child, "ISA Option ROM");
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else
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device_set_desc(child, "ISA Option ROMs");
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}
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static int
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orm_detach(device_t dev)
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{
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int i;
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struct orm_softc *sc = device_get_softc(dev);
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for (i = 0; i < sc->rnum; i++)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i],
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sc->res[i]);
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return (0);
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}
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static device_method_t orm_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, orm_identify),
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DEVMETHOD(device_probe, orm_probe),
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DEVMETHOD(device_attach, orm_attach),
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DEVMETHOD(device_detach, orm_detach),
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{ 0, 0 }
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};
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static driver_t orm_driver = {
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"orm",
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orm_methods,
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sizeof (struct orm_softc)
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};
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static devclass_t orm_devclass;
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DRIVER_MODULE(orm, isa, orm_driver, orm_devclass, 0, 0);
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