FreeBSD-5.3/sys/dev/buslogic/bt_isa.c
/*
* Product specific probe and attach routines for:
* Buslogic BT-54X and BT-445 cards
*
* Copyright (c) 1998, 1999 Justin T. Gibbs
* 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,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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: src/sys/dev/buslogic/bt_isa.c,v 1.23 2004/03/17 17:50:29 njl Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <dev/buslogic/btreg.h>
#include <cam/scsi/scsi_all.h>
static bus_dma_filter_t btvlbouncefilter;
static bus_dmamap_callback_t btmapsensebuffers;
static int
bt_isa_alloc_resources(device_t dev, u_long portstart, u_long portend)
{
int rid;
struct resource *port;
struct resource *irq;
struct resource *drq;
rid = 0;
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
portstart, portend, BT_NREGS, RF_ACTIVE);
if (!port)
return (ENOMEM);
if (isa_get_irq(dev) != -1) {
rid = 0;
irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (!irq) {
if (port)
bus_release_resource(dev, SYS_RES_IOPORT,
0, port);
return (ENOMEM);
}
} else
irq = 0;
if (isa_get_drq(dev) != -1) {
rid = 0;
drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
if (!drq) {
if (port)
bus_release_resource(dev, SYS_RES_IOPORT,
0, port);
if (irq)
bus_release_resource(dev, SYS_RES_IRQ,
0, irq);
return (ENOMEM);
}
} else
drq = 0;
bt_init_softc(dev, port, irq, drq);
return (0);
}
static void
bt_isa_release_resources(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
if (bt->port)
bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
if (bt->irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
if (bt->drq)
bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
bt_free_softc(dev);
}
/*
* Check if the device can be found at the port given
* and if so, set it up ready for further work
* as an argument, takes the isa_device structure from
* autoconf.c
*/
static int
bt_isa_probe(device_t dev)
{
/*
* find unit and check we have that many defined
*/
int port_index;
int max_port_index;
/* No pnp support */
if (isa_get_vendorid(dev))
return (ENXIO);
port_index = 0;
max_port_index = BT_NUM_ISAPORTS - 1;
/*
* Bound our board search if the user has
* specified an exact port.
*/
bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index);
if (port_index < 0)
return (ENXIO);
/* Attempt to find an adapter */
for (;port_index <= max_port_index; port_index++) {
struct bt_probe_info info;
u_int ioport;
ioport = bt_iop_from_bio(port_index);
/*
* Ensure this port has not already been claimed already
* by a PCI, EISA or ISA adapter.
*/
if (bt_check_probed_iop(ioport) != 0)
continue;
/* Initialise the softc for use during probing */
if (bt_isa_alloc_resources(dev, ioport,
ioport + BT_NREGS -1) != 0)
continue;
/* We're going to attempt to probe it now, so mark it probed */
bt_mark_probed_bio(port_index);
if (bt_port_probe(dev, &info) != 0) {
if (bootverbose)
printf("bt_isa_probe: Probe failed at 0x%x\n",
ioport);
bt_isa_release_resources(dev);
continue;
}
bt_isa_release_resources(dev);
bus_set_resource(dev, SYS_RES_DRQ, 0, info.drq, 1);
bus_set_resource(dev, SYS_RES_IRQ, 0, info.irq, 1);
return (0);
}
return (ENXIO);
}
/*
* Attach all the sub-devices we can find
*/
static int
bt_isa_attach(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
bus_dma_filter_t *filter;
void *filter_arg;
bus_addr_t lowaddr;
int error, drq;
/* Initialise softc */
error = bt_isa_alloc_resources(dev, 0, ~0);
if (error) {
device_printf(dev, "can't allocate resources in bt_isa_attach\n");
return error;
}
/* Program the DMA channel for external control */
if ((drq = isa_get_drq(dev)) != -1)
isa_dmacascade(drq);
/* Allocate our parent dmatag */
filter = NULL;
filter_arg = NULL;
lowaddr = BUS_SPACE_MAXADDR_24BIT;
if (bt->model[0] == '4') {
/*
* This is a VL adapter. Typically, VL devices have access
* to the full 32bit address space. On BT-445S adapters
* prior to revision E, there is a hardware bug that causes
* corruption of transfers to/from addresses in the range of
* the BIOS modulo 16MB. The only properly functioning
* BT-445S Host Adapters have firmware version 3.37.
* If we encounter one of these adapters and the BIOS is
* installed, install a filter function for our bus_dma_map
* that will catch these accesses and bounce them to a safe
* region of memory.
*/
if (bt->bios_addr != 0
&& strcmp(bt->model, "445S") == 0
&& strcmp(bt->firmware_ver, "3.37") < 0) {
filter = btvlbouncefilter;
filter_arg = bt;
} else {
lowaddr = BUS_SPACE_MAXADDR_32BIT;
}
}
/* XXX Should be a child of the ISA or VL bus dma tag */
if (bus_dma_tag_create( /* parent */ NULL,
/* alignemnt */ 1,
/* boundary */ 0,
/* lowaddr */ lowaddr,
/* highaddr */ BUS_SPACE_MAXADDR,
/* filter */ filter,
/* filterarg */ filter_arg,
/* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
/* nsegments */ ~0,
/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
/* flags */ 0,
/* lockfunc */ busdma_lock_mutex,
/* lockarg */ &Giant,
&bt->parent_dmat) != 0) {
bt_isa_release_resources(dev);
return (ENOMEM);
}
error = bt_init(dev);
if (error) {
bt_isa_release_resources(dev);
return (ENOMEM);
}
if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
/* DMA tag for our sense buffers */
if (bus_dma_tag_create(
/* parent */ bt->parent_dmat,
/* alignment */ 1,
/* boundary */ 0,
/* lowaddr */ BUS_SPACE_MAXADDR,
/* highaddr */ BUS_SPACE_MAXADDR,
/* filter */ NULL,
/* filterarg */ NULL,
/* maxsize */ bt->max_ccbs *
sizeof(struct scsi_sense_data),
/* nsegments */ 1,
/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
/* flags */ 0,
/* lockfunc */ busdma_lock_mutex,
/* lockarg */ &Giant,
&bt->sense_dmat) != 0) {
bt_isa_release_resources(dev);
return (ENOMEM);
}
bt->init_level++;
/* Allocation of sense buffers */
if (bus_dmamem_alloc(bt->sense_dmat,
(void **)&bt->sense_buffers,
BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
bt_isa_release_resources(dev);
return (ENOMEM);
}
bt->init_level++;
/* And permanently map them */
bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
bt->sense_buffers,
bt->max_ccbs * sizeof(*bt->sense_buffers),
btmapsensebuffers, bt, /*flags*/0);
bt->init_level++;
}
error = bt_attach(dev);
if (error) {
bt_isa_release_resources(dev);
return (error);
}
return (0);
}
#define BIOS_MAP_SIZE (16 * 1024)
static int
btvlbouncefilter(void *arg, bus_addr_t addr)
{
struct bt_softc *bt;
bt = (struct bt_softc *)arg;
addr &= BUS_SPACE_MAXADDR_24BIT;
if (addr == 0
|| (addr >= bt->bios_addr
&& addr < (bt->bios_addr + BIOS_MAP_SIZE)))
return (1);
return (0);
}
static void
btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct bt_softc* bt;
bt = (struct bt_softc*)arg;
bt->sense_buffers_physbase = segs->ds_addr;
}
static device_method_t bt_isa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bt_isa_probe),
DEVMETHOD(device_attach, bt_isa_attach),
{ 0, 0 }
};
static driver_t bt_isa_driver = {
"bt",
bt_isa_methods,
sizeof(struct bt_softc),
};
static devclass_t bt_devclass;
DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);