File: [local] / sys / arch / sparc / dev / cgfourteen.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:02 2008 UTC (16 years, 6 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: cgfourteen.c,v 1.35 2007/03/13 19:40:48 miod Exp $ */
/* $NetBSD: cgfourteen.c,v 1.7 1997/05/24 20:16:08 pk Exp $ */
/*
* Copyright (c) 2002, 2003, 2005 Miodrag Vallat.
*
* 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 ``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 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.
*
*
* Copyright (c) 1996
* The President and Fellows of Harvard College. All rights reserved.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Harvard University.
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 by the University of
* California, Berkeley and its contributors.
* This product includes software developed by Harvard University and
* its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* Based on:
* NetBSD: cgthree.c,v 1.28 1996/05/31 09:59:22 pk Exp
* NetBSD: cgsix.c,v 1.25 1996/04/01 17:30:00 christos Exp
*/
/*
* Driver for Campus-II on-board mbus-based video (cgfourteen).
*
* XXX should bring hardware cursor code back
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/cpu.h>
#include <machine/conf.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>
#include <machine/fbvar.h>
#include <sparc/dev/cgfourteenreg.h>
#include <dev/cons.h> /* for prom console hook */
/*
* Per-display variables/state
*/
union cgfourteen_cmap {
u_char cm_map[256][4]; /* 256 R/G/B/A entries (B is high)*/
u_int32_t cm_chip[256]; /* the way the chip gets loaded */
};
struct cgfourteen_softc {
struct sunfb sc_sunfb; /* common base part */
struct rom_reg sc_phys; /* phys address of frame buffer */
union cgfourteen_cmap sc_cmap; /* current colormap */
u_int sc_cmap_start, sc_cmap_count; /* deferred cmap range */
/* registers mappings */
struct cg14ctl *sc_ctl;
struct cg14curs *sc_hwc;
struct cg14dac *sc_dac;
struct cg14xlut *sc_xlut;
struct cg14clut *sc_clut1;
struct cg14clut *sc_clut2;
struct cg14clut *sc_clut3;
u_int32_t *sc_autoincr;
int sc_rev; /* VSIMM revision */
int sc_32; /* can do 32bit at this resolution */
size_t sc_vramsize; /* total video memory size */
struct intrhand sc_ih;
};
int cgfourteen_ioctl(void *, u_long, caddr_t, int, struct proc *);
paddr_t cgfourteen_mmap(void *, off_t, int);
void cgfourteen_reset(struct cgfourteen_softc *, int);
void cgfourteen_burner(void *, u_int, u_int);
int cgfourteen_getcmap(union cgfourteen_cmap *, struct wsdisplay_cmap *);
int cgfourteen_intr(void *);
void cgfourteen_loadcmap_deferred(struct cgfourteen_softc *, u_int, u_int);
void cgfourteen_loadcmap_immediate(struct cgfourteen_softc *, u_int, u_int);
void cgfourteen_prom(void *);
int cgfourteen_putcmap(union cgfourteen_cmap *, struct wsdisplay_cmap *);
void cgfourteen_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
struct wsdisplay_accessops cgfourteen_accessops = {
cgfourteen_ioctl,
cgfourteen_mmap,
NULL, /* alloc_screen */
NULL, /* free_screen */
NULL, /* show_screen */
NULL, /* load_font */
NULL, /* scrollback */
NULL, /* getchar */
cgfourteen_burner,
NULL /* pollc */
};
void cgfourteenattach(struct device *, struct device *, void *);
int cgfourteenmatch(struct device *, void *, void *);
struct cfattach cgfourteen_ca = {
sizeof(struct cgfourteen_softc), cgfourteenmatch, cgfourteenattach
};
struct cfdriver cgfourteen_cd = {
NULL, "cgfourteen", DV_DULL
};
/*
* Match a cgfourteen.
*/
int
cgfourteenmatch(struct device *parent, void *vcf, void *aux)
{
struct cfdata *cf = vcf;
struct confargs *ca = aux;
struct romaux *ra = &ca->ca_ra;
if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
return (0);
/*
* This driver should not be attached without an "addr" locator,
* as this is the only way to differentiate the main and secondary
* VSIMM.
*/
if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != (int)ra->ra_paddr)
return (0);
/*
* The cgfourteen is a local-bus video adaptor, accessed directly
* via the processor, and not through device space or an external
* bus. Thus we look _only_ at the obio bus.
* Additionally, these things exist only on the Sun4m.
*/
if (CPU_ISSUN4M && ca->ca_bustype == BUS_OBIO)
return (1);
return (0);
}
/*
* Attach a display.
*/
void
cgfourteenattach(struct device *parent, struct device *self, void *args)
{
struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self;
struct confargs *ca = args;
int node, pri, i;
u_int32_t *lut;
int isconsole;
char *nam;
pri = ca->ca_ra.ra_intr[0].int_pri;
printf(" pri %d: ", pri);
/*
* Sanity checks
*/
if (ca->ca_ra.ra_len < 0x10000) {
printf("expected %x bytes of control registers, got %x\n",
0x10000, ca->ca_ra.ra_len);
return;
}
if (ca->ca_ra.ra_nreg < CG14_NREG) {
printf("expected %d registers, got %d\n",
CG14_NREG, ca->ca_ra.ra_nreg);
return;
}
if (ca->ca_ra.ra_nintr != 1) {
printf("expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr);
return;
}
node = ca->ca_ra.ra_node;
nam = getpropstring(node, "model");
if (*nam != '\0')
printf("%s, ", nam);
isconsole = node == fbnode;
/*
* Map in the 8 useful pages of registers
*/
sc->sc_ctl = (struct cg14ctl *) mapiodev(
&ca->ca_ra.ra_reg[CG14_REG_CONTROL], 0, ca->ca_ra.ra_len);
sc->sc_hwc = (struct cg14curs *) ((u_int)sc->sc_ctl +
CG14_OFFSET_CURS);
sc->sc_dac = (struct cg14dac *) ((u_int)sc->sc_ctl +
CG14_OFFSET_DAC);
sc->sc_xlut = (struct cg14xlut *) ((u_int)sc->sc_ctl +
CG14_OFFSET_XLUT);
sc->sc_clut1 = (struct cg14clut *) ((u_int)sc->sc_ctl +
CG14_OFFSET_CLUT1);
sc->sc_clut2 = (struct cg14clut *) ((u_int)sc->sc_ctl +
CG14_OFFSET_CLUT2);
sc->sc_clut3 = (struct cg14clut *) ((u_int)sc->sc_ctl +
CG14_OFFSET_CLUT3);
sc->sc_autoincr = (u_int32_t *) ((u_int)sc->sc_ctl +
CG14_OFFSET_AUTOINCR);
sc->sc_rev =
(sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) >> CG14_RSR_REVSHIFT;
printf("%dMB, rev %d.%d", ca->ca_ra.ra_reg[CG14_REG_VRAM].rr_len >> 20,
sc->sc_rev, sc->sc_ctl->ctl_rsr & CG14_RSR_IMPLMASK);
sc->sc_phys = ca->ca_ra.ra_reg[CG14_REG_VRAM];
fb_setsize(&sc->sc_sunfb, 8, 1152, 900, node, ca->ca_bustype);
/*
* The prom will report depth == 8, since this is the mode it will
* get initialized in.
* Check if we will be able to use 32 bit mode later (i.e. if it will
* fit in the video memory. Note that, if this is not the case, the
* VSIMM will usually not appear in the OBP device tree!
*/
sc->sc_vramsize = ca->ca_ra.ra_reg[CG14_REG_VRAM].rr_len;
sc->sc_32 = sc->sc_sunfb.sf_fbsize * 4 <= sc->sc_vramsize;
sc->sc_sunfb.sf_ro.ri_bits = mapiodev(&ca->ca_ra.ra_reg[CG14_REG_VRAM],
0, /* CHUNKY_XBGR */
sc->sc_vramsize);
printf(", %dx%d\n", sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height);
sc->sc_ih.ih_fun = cgfourteen_intr;
sc->sc_ih.ih_arg = sc;
intr_establish(pri, &sc->sc_ih, IPL_FB, self->dv_xname);
/*
* Reset frame buffer controls
*/
sc->sc_sunfb.sf_depth = 0; /* force action */
cgfourteen_reset(sc, 8);
/*
* Grab the initial colormap
*/
lut = (u_int32_t *)sc->sc_clut1->clut_lut;
for (i = 0; i < CG14_CLUT_SIZE; i++)
sc->sc_cmap.cm_chip[i] = lut[i];
/*
* Enable the video.
*/
cgfourteen_burner(sc, 1, 0);
sc->sc_sunfb.sf_ro.ri_hw = sc;
fbwscons_init(&sc->sc_sunfb, isconsole ? 0 : RI_CLEAR);
fbwscons_setcolormap(&sc->sc_sunfb, cgfourteen_setcolor);
if (isconsole) {
fbwscons_console_init(&sc->sc_sunfb, -1);
shutdownhook_establish(cgfourteen_prom, sc);
}
fbwscons_attach(&sc->sc_sunfb, &cgfourteen_accessops, isconsole);
}
int
cgfourteen_ioctl(void *dev, u_long cmd, caddr_t data, int flags, struct proc *p)
{
struct cgfourteen_softc *sc = dev;
struct wsdisplay_cmap *cm;
struct wsdisplay_fbinfo *wdf;
int error;
/*
* Note that, although the emulation (text) mode is running in a
* 8-bit plane, we advertize the frame buffer as 32-bit if it can
* support this mode.
*/
switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_SUNCG14;
break;
case WSDISPLAYIO_GINFO:
wdf = (struct wsdisplay_fbinfo *)data;
wdf->height = sc->sc_sunfb.sf_height;
wdf->width = sc->sc_sunfb.sf_width;
wdf->depth = sc->sc_32 ? 32 : 8;
wdf->cmsize = sc->sc_32 ? 0 : 256;
break;
case WSDISPLAYIO_GETSUPPORTEDDEPTH:
if (sc->sc_32)
*(u_int *)data = WSDISPLAYIO_DEPTH_24_32;
else
return (-1);
break;
case WSDISPLAYIO_LINEBYTES:
if (sc->sc_32)
*(u_int *)data = sc->sc_sunfb.sf_linebytes * 4;
else
*(u_int *)data = sc->sc_sunfb.sf_linebytes;
break;
case WSDISPLAYIO_GETCMAP:
if (sc->sc_32 == 0) {
cm = (struct wsdisplay_cmap *)data;
error = cgfourteen_getcmap(&sc->sc_cmap, cm);
if (error)
return (error);
}
break;
case WSDISPLAYIO_PUTCMAP:
if (sc->sc_32 == 0) {
cm = (struct wsdisplay_cmap *)data;
error = cgfourteen_putcmap(&sc->sc_cmap, cm);
if (error)
return (error);
cgfourteen_loadcmap_deferred(sc, cm->index, cm->count);
}
break;
case WSDISPLAYIO_SMODE:
if (*(int *)data == WSDISPLAYIO_MODE_EMUL) {
/* Back from X11 to text mode */
cgfourteen_reset(sc, 8);
} else {
/* Starting X11, try to switch to 32 bit mode */
if (sc->sc_32)
cgfourteen_reset(sc, 32);
}
break;
case WSDISPLAYIO_GVIDEO:
case WSDISPLAYIO_SVIDEO:
break;
default:
return (-1); /* not supported yet */
}
return (0);
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*/
paddr_t
cgfourteen_mmap(void *v, off_t offset, int prot)
{
struct cgfourteen_softc *sc = v;
if (offset & PGOFSET || offset < 0)
return (-1);
/* Allow mapping as a dumb framebuffer from offset 0 */
if (offset < sc->sc_sunfb.sf_fbsize * (sc->sc_32 ? 4 : 1)) {
return (REG2PHYS(&sc->sc_phys, offset) | PMAP_NC);
}
return (-1);
}
/* Initialize the framebuffer, storing away useful state for later reset */
void
cgfourteen_reset(struct cgfourteen_softc *sc, int depth)
{
u_int i;
if (sc->sc_sunfb.sf_depth != depth) {
if (depth == 8) {
/*
* Enable the video and put it in 8 bit mode
*/
if (sc->sc_rev == 0)
sc->sc_ctl->ctl_mctl = CG14_MCTL_R0_ENABLEHW |
CG14_MCTL_PIXMODE_8;
else
sc->sc_ctl->ctl_mctl = CG14_MCTL_R1_ENABLEHW |
CG14_MCTL_R1_ENABLEVID |
CG14_MCTL_PIXMODE_8;
fbwscons_setcolormap(&sc->sc_sunfb,
cgfourteen_setcolor);
} else {
/*
* Clear the screen to black
*/
bzero(sc->sc_sunfb.sf_ro.ri_bits,
sc->sc_sunfb.sf_fbsize);
/*
* Enable the video, and put in 32 bit mode
*/
if (sc->sc_rev == 0)
sc->sc_ctl->ctl_mctl = CG14_MCTL_R0_ENABLEHW |
CG14_MCTL_PIXMODE_32;
else
sc->sc_ctl->ctl_mctl = CG14_MCTL_R1_ENABLEHW |
CG14_MCTL_R1_ENABLEVID |
CG14_MCTL_PIXMODE_32;
/*
* Zero the xlut to enable direct-color mode
*/
sc->sc_xlut->xlut_lutinc[0] = 0;
for (i = CG14_CLUT_SIZE; i; i--)
*sc->sc_autoincr = 0;
}
}
sc->sc_cmap_count = 0;
sc->sc_sunfb.sf_depth = depth;
}
void
cgfourteen_prom(void *v)
{
struct cgfourteen_softc *sc = v;
extern struct consdev consdev_prom;
if (sc->sc_sunfb.sf_depth != 8) {
/*
* Go back to 8-bit mode.
*/
cgfourteen_reset(sc, 8);
/*
* Go back to prom output for the last few messages, so they
* will be displayed correctly.
*/
cn_tab = &consdev_prom;
}
}
void
cgfourteen_burner(void *v, u_int on, u_int flags)
{
struct cgfourteen_softc *sc = v;
u_int bits;
/*
* We can only use DPMS to power down the display if the chip revision
* is greater than 0.
*/
if (sc->sc_rev == 0)
bits = CG14_MCTL_R0_ENABLEHW;
else
bits = CG14_MCTL_R1_ENABLEHW | CG14_MCTL_R1_ENABLEVID;
if (on) {
sc->sc_ctl->ctl_mctl |= bits;
} else {
sc->sc_ctl->ctl_mctl &= ~bits;
}
}
/* Read the software shadow colormap */
int
cgfourteen_getcmap(union cgfourteen_cmap *cm, struct wsdisplay_cmap *rcm)
{
u_int index = rcm->index, count = rcm->count, i;
int error;
if (index >= CG14_CLUT_SIZE || count > CG14_CLUT_SIZE - index)
return (EINVAL);
for (i = 0; i < count; i++) {
if ((error = copyout(&cm->cm_map[index + i][3],
&rcm->red[i], 1)) != 0)
return (error);
if ((error = copyout(&cm->cm_map[index + i][2],
&rcm->green[i], 1)) != 0)
return (error);
if ((error = copyout(&cm->cm_map[index + i][1],
&rcm->blue[i], 1)) != 0)
return (error);
}
return (0);
}
/* Write the software shadow colormap */
int
cgfourteen_putcmap(union cgfourteen_cmap *cm, struct wsdisplay_cmap *rcm)
{
u_int index = rcm->index, count = rcm->count, i;
int error;
if (index >= CG14_CLUT_SIZE || count > CG14_CLUT_SIZE - index)
return (EINVAL);
for (i = 0; i < count; i++) {
if ((error = copyin(&rcm->red[i],
&cm->cm_map[index + i][3], 1)) != 0)
return (error);
if ((error = copyin(&rcm->green[i],
&cm->cm_map[index + i][2], 1)) != 0)
return (error);
if ((error = copyin(&rcm->blue[i],
&cm->cm_map[index + i][1], 1)) != 0)
return (error);
cm->cm_map[index +i][0] = 0; /* no alpha channel */
}
return (0);
}
void
cgfourteen_loadcmap_deferred(struct cgfourteen_softc *sc, u_int start,
u_int ncolors)
{
u_int end;
/* Grow the deferred colormap update range if necessary */
if (sc->sc_cmap_count == 0) {
sc->sc_cmap_start = start;
sc->sc_cmap_count = ncolors;
} else {
end = MAX(start + ncolors,
sc->sc_cmap_start + sc->sc_cmap_count);
sc->sc_cmap_start = min(sc->sc_cmap_start, start);
sc->sc_cmap_count = end - sc->sc_cmap_start;
}
/* Enable interrupts */
sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEINTR;
}
void
cgfourteen_loadcmap_immediate(struct cgfourteen_softc *sc, u_int start,
u_int ncolors)
{
u_int32_t *colp = &sc->sc_cmap.cm_chip[start];
sc->sc_clut1->clut_lutinc[start] = 0;
while (ncolors-- != 0)
*sc->sc_autoincr = *colp++;
}
void
cgfourteen_setcolor(void *v, u_int index, u_int8_t r, u_int8_t g, u_int8_t b)
{
struct cgfourteen_softc *sc = v;
sc->sc_cmap.cm_map[index][3] = r;
sc->sc_cmap.cm_map[index][2] = g;
sc->sc_cmap.cm_map[index][1] = b;
sc->sc_cmap.cm_map[index][0] = 0; /* no alpha channel */
cgfourteen_loadcmap_immediate(sc, index, 1);
}
int
cgfourteen_intr(void *v)
{
struct cgfourteen_softc *sc = v;
u_int msr;
int claim = 0;
msr = sc->sc_ctl->ctl_msr;
/* check that the interrupt is ours */
if (!ISSET(msr, CG14_MSR_PENDING) ||
!ISSET(sc->sc_ctl->ctl_mctl, CG14_MCTL_ENABLEINTR)) {
return (0);
}
/* vertical retrace interrupt */
if (ISSET(msr, CG14_MSR_VRETRACE)) {
/* acknowledge by writing to the (read only) msr */
sc->sc_ctl->ctl_msr = 0;
/* disable interrupts until next colormap change */
sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEINTR;
cgfourteen_loadcmap_immediate(sc,
sc->sc_cmap_start, sc->sc_cmap_count);
claim = 1;
}
/* engine fault */
if (ISSET(msr, CG14_MSR_FAULT)) {
/* acknowledge by reading the fault status register */
claim = 1 | sc->sc_ctl->ctl_fsr;
}
if (claim == 0) {
#ifdef DEBUG
printf("%s: unknown interrupt cause, msr=%x\n",
sc->sc_sunfb.sf_dev.dv_xname, msr);
#endif
claim = 1; /* claim anyway */
}
return (claim & 1);
}