mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
187 lines
5.0 KiB
C
187 lines
5.0 KiB
C
/*-
|
|
* 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(child, SYS_RES_MEMORY, &rid, 0ul,
|
|
~0ul, 1, 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(child, SYS_RES_MEMORY, &rid, 0ul,
|
|
~0ul, 1, 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, "Option ROM");
|
|
else
|
|
device_set_desc(child, "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);
|