freebsd-dev/sys/i386/isa/bt_isa.c

323 lines
8.6 KiB
C

/*
* Product specific probe and attach routines for:
* Buslogic BT-54X and BT-445 cards
*
* Copyright (c) 1998 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.
*
* $Id$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <i386/isa/isa_device.h>
#include <dev/buslogic/btreg.h>
#include <cam/scsi/scsi_all.h>
#include "ioconf.h"
static int bt_isa_probe __P((struct isa_device *dev));
static int bt_isa_attach __P((struct isa_device *dev));
static void bt_isa_intr __P((void *unit));
static bus_dma_filter_t btvlbouncefilter;
static bus_dmamap_callback_t btmapsensebuffers;
struct isa_driver btdriver =
{
bt_isa_probe,
bt_isa_attach,
"bt"
};
/*
* 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(dev)
struct isa_device *dev;
{
/*
* find unit and check we have that many defined
*/
struct bt_softc *bt;
int port_index;
int max_port_index;
/*
* We ignore the unit number assigned by config to allow
* consistant numbering between PCI/EISA/ISA devices.
* This is a total kludge until we have a configuration
* manager.
*/
dev->id_unit = bt_unit;
bt = NULL;
port_index = 0;
max_port_index = BT_NUM_ISAPORTS - 1;
/*
* Bound our board search if the user has
* specified an exact port.
*/
if (dev->id_iobase > 0) {
for (;port_index <= max_port_index; port_index++)
if (dev->id_iobase >= bt_isa_ports[port_index].addr)
break;
if ((port_index > max_port_index)
|| (dev->id_iobase != bt_isa_ports[port_index].addr)) {
printf("
bt_isa_probe: Invalid baseport of 0x%x specified.
bt_isa_probe: Nearest valid baseport is 0x%x.
bt_isa_probe: Failing probe.\n",
dev->id_iobase,
(port_index <= max_port_index)
? bt_isa_ports[port_index].addr
: bt_isa_ports[max_port_index].addr);
return 0;
}
}
/* Attempt to find an adapter */
for (;port_index <= max_port_index; port_index++) {
config_data_t config_data;
u_int ioport;
int error;
ioport = bt_isa_ports[port_index].addr;
/*
* Ensure this port has not already been claimed already
* by a PCI or EISA adapter.
*/
if (bt_check_probed_iop(ioport) != 0)
continue;
/* Allocate a softc for use during probing */
bt = bt_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
if (bt == NULL)
break;
/* We're going to attempt to probe it now, so mark it probed */
bt_mark_probed_bio(port_index);
/* See if there is really a card present */
if (bt_probe(bt) || bt_fetch_adapter_info(bt)) {
bt_free(bt);
continue;
}
/*
* Determine our IRQ, and DMA settings and
* export them to the configuration system.
*/
error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
(u_int8_t*)&config_data, sizeof(config_data),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
printf("bt_isa_probe: Could not determine IRQ or DMA "
"settings for adapter at 0x%x. Failing probe\n",
ioport);
bt_free(bt);
continue;
}
if (bt->model[0] == '5') {
/* DMA settings only make sense for ISA cards */
switch (config_data.dma_chan) {
case DMA_CHAN_5:
dev->id_drq = 5;
break;
case DMA_CHAN_6:
dev->id_drq = 6;
break;
case DMA_CHAN_7:
dev->id_drq = 7;
break;
default:
printf("bt_isa_probe: Invalid DMA setting "
"detected for adapter at 0x%x. "
"Failing probe\n", ioport);
}
} else {
/* VL DMA */
dev->id_drq = -1;
}
dev->id_iobase = bt_isa_ports[port_index].addr;
dev->id_irq = (config_data.irq << 9);
dev->id_intr = bt_isa_intr;
bt_unit++;
return (BT_NREGS);
}
return (0);
}
/*
* Attach all the sub-devices we can find
*/
static int
bt_isa_attach(dev)
struct isa_device *dev;
{
struct bt_softc *bt;
bus_dma_filter_t *filter;
void *filter_arg;
bus_addr_t lowaddr;
bt = bt_softcs[dev->id_unit];
if (dev->id_drq != -1)
isa_dmacascade(dev->id_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*/0, /*boundary*/0,
lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
filter, filter_arg,
/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
/*nsegments*/BUS_SPACE_UNRESTRICTED,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->parent_dmat) != 0) {
bt_free(bt);
return (-1);
}
if (bt_init(bt)) {
bt_free(bt);
return (-1);
}
if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
/* DMA tag for our sense buffers */
if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
/*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
bt->max_ccbs
* sizeof(struct scsi_sense_data),
/*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->sense_dmat) != 0) {
bt_free(bt);
return (-1);
}
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_free(bt);
return (-1);
}
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++;
}
return (bt_attach(bt));
}
/*
* Handle an ISA interrupt.
* XXX should go away as soon as ISA interrupt handlers
* take a (void *) arg.
*/
static void
bt_isa_intr(void *unit)
{
struct bt_softc* arg = bt_softcs[(int)unit];
bt_intr((void *)arg);
}
#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;
}