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freebsd/sys/pci/bt_pci.c
Justin T. Gibbs 400ea5dc6a Do not disable the ISA compatibility window if it is the same value as
that set for our PCI IO address space.  This can happen on the BT-946.
1998-10-30 02:06:44 +00:00

211 lines
5.8 KiB
C

/*
* Product specific probe and attach routines for:
* Buslogic BT946, BT948, BT956, BT958 SCSI controllers
*
* Copyright (c) 1995, 1997, 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: bt_pci.c,v 1.1 1998/09/15 07:32:57 gibbs Exp $
*/
#include "pci.h"
#if NPCI > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <machine/bus_memio.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <dev/buslogic/btreg.h>
#define BT_PCI_IOADDR PCIR_MAPS
#define BT_PCI_MEMADDR PCIR_MAPS + 4
#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER 0x1040104Bul
#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC 0x0140104Bul
#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT 0x8130104Bul
static int btpcideterminebusspace(pcici_t config_id, bus_space_tag_t* tagp,
bus_space_handle_t* bshp);
static char* bt_pci_probe(pcici_t tag, pcidi_t type);
static void bt_pci_attach(pcici_t config_id, int unit);
static struct pci_device bt_pci_driver = {
"bt",
bt_pci_probe,
bt_pci_attach,
&bt_unit,
NULL
};
DATA_SET (pcidevice_set, bt_pci_driver);
static int
btpcideterminebusspace(pcici_t config_id, bus_space_tag_t* tagp,
bus_space_handle_t* bshp)
{
vm_offset_t vaddr;
vm_offset_t paddr;
u_int16_t io_port;
int command;
vaddr = 0;
paddr = 0;
command = pci_cfgread(config_id, PCIR_COMMAND, /*bytes*/1);
/* XXX Memory Mapped I/O seems to cause problems */
#if 0
if ((command & PCIM_CMD_MEMEN) == 0
|| (pci_map_mem(config_id, BT_PCI_MEMADDR, &vaddr, &paddr)) == 0)
#endif
if ((command & PCIM_CMD_PORTEN) == 0
|| (pci_map_port(config_id, BT_PCI_IOADDR, &io_port)) == 0)
return (-1);
if (vaddr != 0) {
*tagp = I386_BUS_SPACE_MEM;
*bshp = vaddr;
} else {
*tagp = I386_BUS_SPACE_IO;
*bshp = io_port;
}
return (0);
}
static char*
bt_pci_probe (pcici_t config_id, pcidi_t type)
{
switch(type) {
case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
{
struct bt_softc *bt;
bus_space_tag_t tag;
bus_space_handle_t bsh;
pci_info_data_t pci_info;
int error;
if (btpcideterminebusspace(config_id, &tag, &bsh) != 0)
break;
bt = bt_alloc(BT_TEMP_UNIT, tag, bsh);
if (bt == NULL)
break;
/*
* Determine if an ISA compatible I/O port has been
* enabled. If so, record the port so it will not
* be probed by our ISA probe. If the PCI I/O port
* was not set to the compatibility port, disable it.
*/
error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
/*param*/NULL, /*paramlen*/0,
(u_int8_t*)&pci_info, sizeof(pci_info),
DEFAULT_CMD_TIMEOUT);
if (error == 0
&& pci_info.io_port < BIO_DISABLED) {
bt_mark_probed_bio(pci_info.io_port);
if (bsh != bt_fetch_isa_iop(pci_info.io_port)) {
u_int8_t new_addr;
new_addr = BIO_DISABLED;
bt_cmd(bt, BOP_MODIFY_IO_ADDR,
/*param*/&new_addr,
/*paramlen*/1, /*reply_buf*/NULL,
/*reply_len*/0,
DEFAULT_CMD_TIMEOUT);
}
}
bt_free(bt);
return ("Buslogic Multimaster SCSI host adapter");
break;
}
default:
break;
}
return (NULL);
}
static void
bt_pci_attach(pcici_t config_id, int unit)
{
struct bt_softc *bt;
bus_space_tag_t tag;
bus_space_handle_t bsh;
int opri;
if (btpcideterminebusspace(config_id, &tag, &bsh) != 0)
return;
if ((bt = bt_alloc(unit, tag, bsh)) == NULL)
return; /* XXX PCI code should take return status */
/* Allocate a dmatag for our CCB DMA maps */
/* XXX Should be a child of the PCI bus dma tag */
if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
/*nsegments*/BUS_SPACE_UNRESTRICTED,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->parent_dmat) != 0) {
bt_free(bt);
return;
}
if ((pci_map_int(config_id, bt_intr, (void *)bt, &cam_imask)) == 0) {
bt_free(bt);
return;
}
/*
* Protect ourself from spurrious interrupts during
* intialization and attach. We should really rely
* on interrupts during attach, but we don't have
* access to our interrupts during ISA probes, so until
* that changes, we mask our interrupts during attach
* too.
*/
opri = splcam();
if (bt_probe(bt) || bt_fetch_adapter_info(bt) || bt_init(bt)) {
bt_free(bt);
splx(opri);
return; /* XXX PCI code should take return status */
}
bt_attach(bt);
splx(opri);
return;
}
#endif /* NPCI > 0 */