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