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/* $NetBSD: gt_pci.c,v 1.4 2003/07/15 00:24:54 lukem Exp $ */
/*-
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* PCI configuration support for gt I/O Processor chip.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/mips/malta/gt_pci.c 229093 2011-12-31 14:12:12Z hselasky $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/pmap.h>
#include <mips/malta/maltareg.h>
#include <mips/malta/gtreg.h>
#include <mips/malta/gtvar.h>
#include <isa/isareg.h>
#include <dev/ic/i8259.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcib_private.h>
#include "pcib_if.h"
#define ICU_LEN 16 /* number of ISA IRQs */
/*
* XXX: These defines are from NetBSD's <dev/ic/i8259reg.h>. Respective file
* from FreeBSD src tree <dev/ic/i8259.h> lacks some definitions.
*/
#define PIC_OCW1 1
#define PIC_OCW2 0
#define PIC_OCW3 0
#define OCW2_SELECT 0
#define OCW2_ILS(x) ((x) << 0) /* interrupt level select */
#define OCW3_POLL_IRQ(x) ((x) & 0x7f)
#define OCW3_POLL_PENDING (1U << 7)
struct gt_pci_softc;
struct gt_pci_intr_cookie {
int irq;
struct gt_pci_softc *sc;
};
struct gt_pci_softc {
device_t sc_dev;
bus_space_tag_t sc_st;
bus_space_handle_t sc_ioh_icu1;
bus_space_handle_t sc_ioh_icu2;
bus_space_handle_t sc_ioh_elcr;
int sc_busno;
struct rman sc_mem_rman;
struct rman sc_io_rman;
struct rman sc_irq_rman;
unsigned long sc_mem;
bus_space_handle_t sc_io;
struct resource *sc_irq;
struct intr_event *sc_eventstab[ICU_LEN];
struct gt_pci_intr_cookie sc_intr_cookies[ICU_LEN];
uint16_t sc_imask;
uint16_t sc_elcr;
uint16_t sc_reserved;
void *sc_ih;
};
static void gt_pci_set_icus(struct gt_pci_softc *);
static int gt_pci_intr(void *v);
static int gt_pci_probe(device_t);
static int gt_pci_attach(device_t);
static int gt_pci_activate_resource(device_t, device_t, int, int,
struct resource *);
static int gt_pci_setup_intr(device_t, device_t, struct resource *,
int, driver_filter_t *, driver_intr_t *, void *, void **);
static int gt_pci_teardown_intr(device_t, device_t, struct resource *, void*);
static int gt_pci_maxslots(device_t );
static int gt_pci_conf_setup(struct gt_pci_softc *, int, int, int, int,
uint32_t *);
static uint32_t gt_pci_read_config(device_t, u_int, u_int, u_int, u_int, int);
static void gt_pci_write_config(device_t, u_int, u_int, u_int, u_int,
uint32_t, int);
static int gt_pci_route_interrupt(device_t pcib, device_t dev, int pin);
static struct resource * gt_pci_alloc_resource(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
static void
gt_pci_mask_irq(void *source)
{
struct gt_pci_intr_cookie *cookie = source;
struct gt_pci_softc *sc = cookie->sc;
int irq = cookie->irq;
sc->sc_imask |= (1 << irq);
sc->sc_elcr |= (1 << irq);
gt_pci_set_icus(sc);
}
static void
gt_pci_unmask_irq(void *source)
{
struct gt_pci_intr_cookie *cookie = source;
struct gt_pci_softc *sc = cookie->sc;
int irq = cookie->irq;
/* Enable it, set trigger mode. */
sc->sc_imask &= ~(1 << irq);
sc->sc_elcr &= ~(1 << irq);
gt_pci_set_icus(sc);
}
static void
gt_pci_set_icus(struct gt_pci_softc *sc)
{
/* Enable the cascade IRQ (2) if 8-15 is enabled. */
if ((sc->sc_imask & 0xff00) != 0xff00)
sc->sc_imask &= ~(1U << 2);
else
sc->sc_imask |= (1U << 2);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, PIC_OCW1,
sc->sc_imask & 0xff);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, PIC_OCW1,
(sc->sc_imask >> 8) & 0xff);
bus_space_write_1(sc->sc_st, sc->sc_ioh_elcr, 0,
sc->sc_elcr & 0xff);
bus_space_write_1(sc->sc_st, sc->sc_ioh_elcr, 1,
(sc->sc_elcr >> 8) & 0xff);
}
static int
gt_pci_intr(void *v)
{
struct gt_pci_softc *sc = v;
struct intr_event *event;
int irq;
for (;;) {
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, PIC_OCW3,
OCW3_SEL | OCW3_P);
irq = bus_space_read_1(sc->sc_st, sc->sc_ioh_icu1, PIC_OCW3);
if ((irq & OCW3_POLL_PENDING) == 0)
{
return FILTER_HANDLED;
}
irq = OCW3_POLL_IRQ(irq);
if (irq == 2) {
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2,
PIC_OCW3, OCW3_SEL | OCW3_P);
irq = bus_space_read_1(sc->sc_st, sc->sc_ioh_icu2,
PIC_OCW3);
if (irq & OCW3_POLL_PENDING)
irq = OCW3_POLL_IRQ(irq) + 8;
else
irq = 2;
}
event = sc->sc_eventstab[irq];
if (!event || TAILQ_EMPTY(&event->ie_handlers))
continue;
/* TODO: frame instead of NULL? */
intr_event_handle(event, NULL);
/* XXX: Log stray IRQs */
/* Send a specific EOI to the 8259. */
if (irq > 7) {
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2,
PIC_OCW2, OCW2_SELECT | OCW2_EOI | OCW2_SL |
OCW2_ILS(irq & 7));
irq = 2;
}
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, PIC_OCW2,
OCW2_SELECT | OCW2_EOI | OCW2_SL | OCW2_ILS(irq));
}
return FILTER_HANDLED;
}
static int
gt_pci_probe(device_t dev)
{
device_set_desc(dev, "GT64120 PCI bridge");
return (0);
}
static int
gt_pci_attach(device_t dev)
{
uint32_t busno;
struct gt_pci_softc *sc = device_get_softc(dev);
int rid;
busno = 0;
sc->sc_dev = dev;
sc->sc_busno = busno;
sc->sc_st = mips_bus_space_generic;
/* Use KSEG1 to access IO ports for it is uncached */
sc->sc_io = MIPS_PHYS_TO_KSEG1(MALTA_PCI0_IO_BASE);
sc->sc_io_rman.rm_type = RMAN_ARRAY;
sc->sc_io_rman.rm_descr = "GT64120 PCI I/O Ports";
if (rman_init(&sc->sc_io_rman) != 0 ||
rman_manage_region(&sc->sc_io_rman, 0, 0xffff) != 0) {
panic("gt_pci_attach: failed to set up I/O rman");
}
/* Use KSEG1 to access PCI memory for it is uncached */
sc->sc_mem = MIPS_PHYS_TO_KSEG1(MALTA_PCIMEM1_BASE);
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "GT64120 PCI Memory";
if (rman_init(&sc->sc_mem_rman) != 0 ||
rman_manage_region(&sc->sc_mem_rman,
sc->sc_mem, sc->sc_mem + MALTA_PCIMEM1_SIZE) != 0) {
panic("gt_pci_attach: failed to set up memory rman");
}
sc->sc_irq_rman.rm_type = RMAN_ARRAY;
sc->sc_irq_rman.rm_descr = "GT64120 PCI IRQs";
if (rman_init(&sc->sc_irq_rman) != 0 ||
rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0)
panic("gt_pci_attach: failed to set up IRQ rman");
/*
* Map the PIC/ELCR registers.
*/
#if 0
if (bus_space_map(sc->sc_st, 0x4d0, 2, 0, &sc->sc_ioh_elcr) != 0)
device_printf(dev, "unable to map ELCR registers\n");
if (bus_space_map(sc->sc_st, IO_ICU1, 2, 0, &sc->sc_ioh_icu1) != 0)
device_printf(dev, "unable to map ICU1 registers\n");
if (bus_space_map(sc->sc_st, IO_ICU2, 2, 0, &sc->sc_ioh_icu2) != 0)
device_printf(dev, "unable to map ICU2 registers\n");
#else
sc->sc_ioh_elcr = sc->sc_io + 0x4d0;
sc->sc_ioh_icu1 = sc->sc_io + IO_ICU1;
sc->sc_ioh_icu2 = sc->sc_io + IO_ICU2;
#endif
/* All interrupts default to "masked off". */
sc->sc_imask = 0xffff;
/* All interrupts default to edge-triggered. */
sc->sc_elcr = 0;
/*
* Initialize the 8259s.
*/
/* reset, program device, 4 bytes */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 0,
ICW1_RESET | ICW1_IC4);
/*
* XXX: values from NetBSD's <dev/ic/i8259reg.h>
*/
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 1,
0/*XXX*/);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 1,
1 << 2);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 1,
ICW4_8086);
/* mask all interrupts */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 1,
sc->sc_imask & 0xff);
/* enable special mask mode */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 0,
OCW3_SEL | OCW3_ESMM | OCW3_SMM);
/* read IRR by default */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu1, 0,
OCW3_SEL | OCW3_RR);
/* reset, program device, 4 bytes */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 0,
ICW1_RESET | ICW1_IC4);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 1,
0/*XXX*/);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 1,
1 << 2);
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 1,
ICW4_8086);
/* mask all interrupts */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 1,
sc->sc_imask & 0xff);
/* enable special mask mode */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 0,
OCW3_SEL | OCW3_ESMM | OCW3_SMM);
/* read IRR by default */
bus_space_write_1(sc->sc_st, sc->sc_ioh_icu2, 0,
OCW3_SEL | OCW3_RR);
/*
* Default all interrupts to edge-triggered.
*/
bus_space_write_1(sc->sc_st, sc->sc_ioh_elcr, 0,
sc->sc_elcr & 0xff);
bus_space_write_1(sc->sc_st, sc->sc_ioh_elcr, 1,
(sc->sc_elcr >> 8) & 0xff);
/*
* Some ISA interrupts are reserved for devices that
* we know are hard-wired to certain IRQs.
*/
sc->sc_reserved =
(1U << 0) | /* timer */
(1U << 1) | /* keyboard controller (keyboard) */
(1U << 2) | /* PIC cascade */
(1U << 3) | /* COM 2 */
(1U << 4) | /* COM 1 */
(1U << 6) | /* floppy */
(1U << 7) | /* centronics */
(1U << 8) | /* RTC */
(1U << 9) | /* I2C */
(1U << 12) | /* keyboard controller (mouse) */
(1U << 14) | /* IDE primary */
(1U << 15); /* IDE secondary */
/* Hook up our interrupt handler. */
if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
MALTA_SOUTHBRIDGE_INTR, MALTA_SOUTHBRIDGE_INTR, 1,
RF_SHAREABLE | RF_ACTIVE)) == NULL) {
device_printf(dev, "unable to allocate IRQ resource\n");
return ENXIO;
}
if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC,
gt_pci_intr, NULL, sc, &sc->sc_ih))) {
device_printf(dev,
"WARNING: unable to register interrupt handler\n");
return ENXIO;
}
/* Initialize memory and i/o rmans. */
device_add_child(dev, "pci", busno);
return (bus_generic_attach(dev));
}
static int
gt_pci_maxslots(device_t dev)
{
return (PCI_SLOTMAX);
}
static int
gt_pci_conf_setup(struct gt_pci_softc *sc, int bus, int slot, int func,
int reg, uint32_t *addr)
{
*addr = (bus << 16) | (slot << 11) | (func << 8) | reg;
return (0);
}
static uint32_t
gt_pci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
int bytes)
{
struct gt_pci_softc *sc = device_get_softc(dev);
uint32_t data;
uint32_t addr;
uint32_t shift, mask;
if (gt_pci_conf_setup(sc, bus, slot, func, reg & ~3, &addr))
return (uint32_t)(-1);
/* Clear cause register bits. */
GT_REGVAL(GT_INTR_CAUSE) = 0;
GT_REGVAL(GT_PCI0_CFG_ADDR) = (1 << 31) | addr;
data = GT_REGVAL(GT_PCI0_CFG_DATA);
/* Check for master abort. */
if (GT_REGVAL(GT_INTR_CAUSE) & (GTIC_MASABORT0 | GTIC_TARABORT0))
data = (uint32_t) -1;
/*
* XXX: We assume that words readed from GT chip are BE.
* Should we set the mode explicitly during chip
* Initialization?
*/
switch(reg % 4)
{
case 3:
shift = 24;
break;
case 2:
shift = 16;
break;
case 1:
shift = 8;
break;
default:
shift = 0;
break;
}
switch(bytes)
{
case 1:
mask = 0xff;
data = (data >> shift) & mask;
break;
case 2:
mask = 0xffff;
if(reg % 4 == 0)
data = data & mask;
else
data = (data >> 16) & mask;
break;
case 4:
break;
default:
panic("gt_pci_readconfig: wrong bytes count");
break;
}
#if 0
printf("PCICONF_READ(%02x:%02x.%02x[%04x] -> %02x(%d)\n",
bus, slot, func, reg, data, bytes);
#endif
return (data);
}
static void
gt_pci_write_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
uint32_t data, int bytes)
{
struct gt_pci_softc *sc = device_get_softc(dev);
uint32_t addr;
uint32_t reg_data;
uint32_t shift, mask;
if(bytes != 4)
{
reg_data = gt_pci_read_config(dev, bus, slot, func, reg, 4);
/*
* XXX: We assume that words readed from GT chip are BE.
* Should we set the mode explicitly during chip
* Initialization?
*/
shift = 8 * (reg & 3);
switch(bytes)
{
case 1:
mask = 0xff;
data = (reg_data & ~ (mask << shift)) | (data << shift);
break;
case 2:
mask = 0xffff;
if(reg % 4 == 0)
data = (reg_data & ~mask) | data;
else
data = (reg_data & ~ (mask << shift)) |
(data << shift);
break;
case 4:
break;
default:
panic("gt_pci_readconfig: wrong bytes count");
break;
}
}
if (gt_pci_conf_setup(sc, bus, slot, func, reg & ~3, &addr))
return;
/* The galileo has problems accessing device 31. */
if (bus == 0 && slot == 31)
return;
/* XXX: no support for bus > 0 yet */
if (bus > 0)
return;
/* Clear cause register bits. */
GT_REGVAL(GT_INTR_CAUSE) = 0;
GT_REGVAL(GT_PCI0_CFG_ADDR) = (1 << 31) | addr;
GT_REGVAL(GT_PCI0_CFG_DATA) = data;
}
static int
gt_pci_route_interrupt(device_t pcib, device_t dev, int pin)
{
int bus;
int device;
int func;
/* struct gt_pci_softc *sc = device_get_softc(pcib); */
bus = pci_get_bus(dev);
device = pci_get_slot(dev);
func = pci_get_function(dev);
/*
* XXXMIPS: We need routing logic. This is just a stub .
*/
switch (device) {
case 9: /*
* PIIX4 IDE adapter. HW IRQ0
*/
return 0;
default:
printf("No mapping for %d/%d/%d/%d\n", bus, device, func, pin);
}
return (0);
}
static int
gt_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct gt_pci_softc *sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_DOMAIN:
*result = 0;
return (0);
case PCIB_IVAR_BUS:
*result = sc->sc_busno;
return (0);
}
return (ENOENT);
}
static int
gt_write_ivar(device_t dev, device_t child, int which, uintptr_t result)
{
struct gt_pci_softc * sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_BUS:
sc->sc_busno = result;
return (0);
}
return (ENOENT);
}
static struct resource *
gt_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct gt_pci_softc *sc = device_get_softc(bus);
struct resource *rv = NULL;
struct rman *rm;
bus_space_tag_t bt = 0;
bus_space_handle_t bh = 0;
switch (type) {
case SYS_RES_IRQ:
rm = &sc->sc_irq_rman;
break;
case SYS_RES_MEMORY:
rm = &sc->sc_mem_rman;
bt = sc->sc_st;
bh = sc->sc_mem;
break;
case SYS_RES_IOPORT:
rm = &sc->sc_io_rman;
bt = sc->sc_st;
bh = sc->sc_io;
break;
default:
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL)
return (NULL);
rman_set_rid(rv, *rid);
if (type != SYS_RES_IRQ) {
bh += (rman_get_start(rv));
rman_set_bustag(rv, bt);
rman_set_bushandle(rv, bh);
if (flags & RF_ACTIVE) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
}
return (rv);
}
static int
gt_pci_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
bus_space_handle_t p;
int error;
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
error = bus_space_map(rman_get_bustag(r),
rman_get_bushandle(r), rman_get_size(r), 0, &p);
if (error)
return (error);
rman_set_bushandle(r, p);
}
return (rman_activate_resource(r));
}
static int
gt_pci_setup_intr(device_t dev, device_t child, struct resource *ires,
int flags, driver_filter_t *filt, driver_intr_t *handler,
void *arg, void **cookiep)
{
struct gt_pci_softc *sc = device_get_softc(dev);
struct intr_event *event;
int irq, error;
irq = rman_get_start(ires);
if (irq >= ICU_LEN || irq == 2)
panic("%s: bad irq or type", __func__);
event = sc->sc_eventstab[irq];
sc->sc_intr_cookies[irq].irq = irq;
sc->sc_intr_cookies[irq].sc = sc;
if (event == NULL) {
error = intr_event_create(&event,
(void *)&sc->sc_intr_cookies[irq], 0, irq,
gt_pci_mask_irq, gt_pci_unmask_irq,
NULL, NULL, "gt_pci intr%d:", irq);
if (error)
return 0;
sc->sc_eventstab[irq] = event;
}
intr_event_add_handler(event, device_get_nameunit(child), filt,
handler, arg, intr_priority(flags), flags, cookiep);
gt_pci_unmask_irq((void *)&sc->sc_intr_cookies[irq]);
return 0;
}
static int
gt_pci_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
struct gt_pci_softc *sc = device_get_softc(dev);
int irq;
irq = rman_get_start(res);
gt_pci_mask_irq((void *)&sc->sc_intr_cookies[irq]);
return (intr_event_remove_handler(cookie));
}
static device_method_t gt_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, gt_pci_probe),
DEVMETHOD(device_attach, gt_pci_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, gt_read_ivar),
DEVMETHOD(bus_write_ivar, gt_write_ivar),
DEVMETHOD(bus_alloc_resource, gt_pci_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, gt_pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, gt_pci_setup_intr),
DEVMETHOD(bus_teardown_intr, gt_pci_teardown_intr),
/* pcib interface */
DEVMETHOD(pcib_maxslots, gt_pci_maxslots),
DEVMETHOD(pcib_read_config, gt_pci_read_config),
DEVMETHOD(pcib_write_config, gt_pci_write_config),
DEVMETHOD(pcib_route_interrupt, gt_pci_route_interrupt),
DEVMETHOD_END
};
static driver_t gt_pci_driver = {
"pcib",
gt_pci_methods,
sizeof(struct gt_pci_softc),
};
static devclass_t gt_pci_devclass;
DRIVER_MODULE(gt_pci, gt, gt_pci_driver, gt_pci_devclass, 0, 0);