/* $NetBSD: cgfourteen.c,v 1.38 2003/11/13 03:09:28 chs Exp $ */ /* * 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). * Provides minimum emulation of a Sun cgthree 8-bit framebuffer to * allow X to run. * * Does not handle interrupts, even though they can occur. * * XXX should defer colormap updates to vertical retrace interrupts */ /* * The following is for debugging only; it opens up a security hole * enabled by allowing any user to map the control registers for the * cg14 into their space. */ #undef CG14_MAP_REGS /* * The following enables 24-bit operation: when opened, the framebuffer * will switch to 24-bit mode (actually 32-bit mode), and provide a * simple cg8 emulation. * * XXX Note that the code enabled by this define is currently untested/broken. */ #undef CG14_CG8 #include __KERNEL_RCSID(0, "$NetBSD: cgfourteen.c,v 1.38 2003/11/13 03:09:28 chs Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* autoconfiguration driver */ static void cgfourteenattach(struct device *, struct device *, void *); static int cgfourteenmatch(struct device *, struct cfdata *, void *); static void cgfourteenunblank(struct device *); CFATTACH_DECL(cgfourteen, sizeof(struct cgfourteen_softc), cgfourteenmatch, cgfourteenattach, NULL, NULL); extern struct cfdriver cgfourteen_cd; dev_type_open(cgfourteenopen); dev_type_close(cgfourteenclose); dev_type_ioctl(cgfourteenioctl); dev_type_mmap(cgfourteenmmap); const struct cdevsw cgfourteen_cdevsw = { cgfourteenopen, cgfourteenclose, noread, nowrite, cgfourteenioctl, nostop, notty, nopoll, cgfourteenmmap, nokqfilter, }; /* frame buffer generic driver */ static struct fbdriver cgfourteenfbdriver = { cgfourteenunblank, cgfourteenopen, cgfourteenclose, cgfourteenioctl, nopoll, cgfourteenmmap, nokqfilter }; static void cg14_set_video __P((struct cgfourteen_softc *, int)); static int cg14_get_video __P((struct cgfourteen_softc *)); static int cg14_get_cmap __P((struct fbcmap *, union cg14cmap *, int)); static int cg14_put_cmap __P((struct fbcmap *, union cg14cmap *, int)); static void cg14_load_hwcmap __P((struct cgfourteen_softc *, int, int)); static void cg14_init __P((struct cgfourteen_softc *)); static void cg14_reset __P((struct cgfourteen_softc *)); static void cg14_loadomap __P((struct cgfourteen_softc *));/* cursor overlay */ static void cg14_setcursor __P((struct cgfourteen_softc *));/* set position */ static void cg14_loadcursor __P((struct cgfourteen_softc *));/* set shape */ /* * We map the display memory with an offset of 256K when emulating the cg3 or * cg8; the cg3 uses this offset for compatibility with the cg4, and both the * cg4 and cg8 have a mono overlay plane and an overlay enable plane in the * first 256K. Mapping at an offset of 0x04000000 causes only the color * frame buffer to be mapped, without the overlay planes. */ #define START (128*1024 + 128*1024) #define NOOVERLAY (0x04000000) /* * Match a cgfourteen. */ int cgfourteenmatch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { union obio_attach_args *uoba = aux; struct sbus_attach_args *sa = &uoba->uoba_sbus; /* * 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 (uoba->uoba_isobio4 != 0 || !CPU_ISSUN4M) return (0); /* Check driver name */ return (strcmp(cf->cf_name, sa->sa_name) == 0); } /* * Attach a display. We need to notice if it is the console, too. */ void cgfourteenattach(parent, self, aux) struct device *parent, *self; void *aux; { union obio_attach_args *uoba = aux; struct sbus_attach_args *sa = &uoba->uoba_sbus; struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self; struct fbdevice *fb = &sc->sc_fb; bus_space_handle_t bh; int node, ramsize; u_int32_t *lut; int i, isconsole; node = sa->sa_node; /* Remember cookies for cgfourteenmmap() */ sc->sc_bustag = sa->sa_bustag; fb->fb_driver = &cgfourteenfbdriver; fb->fb_device = &sc->sc_dev; /* Mask out invalid flags from the user. */ fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; /* * We're emulating a cg3/8, so represent ourselves as one */ #ifdef CG14_CG8 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; fb->fb_type.fb_depth = 32; #else fb->fb_type.fb_type = FBTYPE_SUN3COLOR; fb->fb_type.fb_depth = 8; #endif fb_setsize_obp(fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node); #ifdef CG14_CG8 /* * fb_setsize_obp set fb->fb_linebytes based on the current * depth reported by obp, but that defaults to 8 bits (as * reported by getpropint(). Update the value to reflect * the depth that will be used after open. * The display memory size returned by the cg8 driver includes * the space used by the overlay planes, but the size returned * by the cg3 driver does not; emulate the other drivers. */ fb->fb_linebytes = (fb->fb_type.fb_width * fb->fb_type.fb_depth) / 8; ramsize = roundup(START + (fb->fb_type.fb_height * fb->fb_linebytes), PAGE_SIZE); #else ramsize = roundup(fb->fb_type.fb_height * fb->fb_linebytes, PAGE_SIZE); #endif fb->fb_type.fb_cmsize = CG14_CLUT_SIZE; fb->fb_type.fb_size = ramsize; if (sa->sa_nreg < 2) { printf("%s: only %d register sets\n", self->dv_xname, sa->sa_nreg); return; } bcopy(sa->sa_reg, sc->sc_physadr, sa->sa_nreg * sizeof(struct openprom_addr)); /* * Now map in the 8 useful pages of registers */ if (sa->sa_size < 0x10000) { #ifdef DIAGNOSTIC printf("warning: can't find all cgfourteen registers...\n"); #endif sa->sa_size = 0x10000; } if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset, sa->sa_size, BUS_SPACE_MAP_LINEAR, &bh) != 0) { printf("%s: cannot map control registers\n", self->dv_xname); return; } sc->sc_ctl = (struct cg14ctl *) (bh); sc->sc_hwc = (struct cg14curs *) (bh + CG14_OFFSET_CURS); sc->sc_dac = (struct cg14dac *) (bh + CG14_OFFSET_DAC); sc->sc_xlut = (struct cg14xlut *) (bh + CG14_OFFSET_XLUT); sc->sc_clut1 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT1); sc->sc_clut2 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT2); sc->sc_clut3 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT3); sc->sc_clutincr = (u_int *) (bh + CG14_OFFSET_CLUTINCR); /* * Let the user know that we're here */ #ifdef CG14_CG8 printf(": cgeight emulated at %dx%dx24bpp", fb->fb_type.fb_width, fb->fb_type.fb_height); #else printf(": cgthree emulated at %dx%dx8bpp", fb->fb_type.fb_width, fb->fb_type.fb_height); #endif /* * Enable the video, but don't change the pixel depth. */ cg14_set_video(sc, 1); /* * 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]; /* See if we're the console */ isconsole = fb_is_console(node); if (isconsole) { printf(" (console)\n"); #ifdef notdef /* * We don't use the raster console since the cg14 is * fast enough already. */ #ifdef RASTERCONSOLE fbrcons_init(fb); #endif #endif /* notdef */ } else printf("\n"); /* Attach to /dev/fb */ fb_attach(&sc->sc_fb, isconsole); } /* * Keep track of the number of opens made. In the 24-bit driver, we need to * switch to 24-bit mode on the first open, and switch back to 8-bit on * the last close. This kind of nonsense is needed to give screenblank * a fighting chance of working. */ static int cg14_opens = 0; int cgfourteenopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; int unit = minor(dev); int s, oldopens; if (unit >= cgfourteen_cd.cd_ndevs || cgfourteen_cd.cd_devs[unit] == NULL) return (ENXIO); s = splhigh(); oldopens = cg14_opens++; splx(s); /* Setup the cg14 as we want it, and save the original PROM state */ if (oldopens == 0) /* first open only, to make screenblank work */ cg14_init(sc); return (0); } int cgfourteenclose(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; int s, opens; s = splhigh(); opens = --cg14_opens; if (cg14_opens < 0) opens = cg14_opens = 0; splx(s); /* * Restore video state to make the PROM happy, on last close. */ if (opens == 0) cg14_reset(sc); return (0); } int cgfourteenioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; caddr_t data; int flags; struct proc *p; { struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; struct fbgattr *fba; union cg14cursor_cmap tcm; int v, error; u_int count; u_int eplane[32], cplane[32]; switch (cmd) { case FBIOGTYPE: *(struct fbtype *)data = sc->sc_fb.fb_type; break; case FBIOGATTR: fba = (struct fbgattr *)data; fba->real_type = FBTYPE_MDICOLOR; fba->owner = 0; /* XXX ??? */ fba->fbtype = sc->sc_fb.fb_type; fba->sattr.flags = 0; fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; fba->sattr.dev_specific[0] = -1; fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; fba->emu_types[1] = -1; break; case FBIOGETCMAP: return (cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap, CG14_CLUT_SIZE)); case FBIOPUTCMAP: /* copy to software map */ #define p ((struct fbcmap *)data) #ifdef CG14_CG8 p->index &= 0xffffff; #endif error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE); if (error) return (error); /* now blast them into the chip */ /* XXX should use retrace interrupt */ cg14_load_hwcmap(sc, p->index, p->count); #undef p break; case FBIOGVIDEO: *(int *)data = cg14_get_video(sc); break; case FBIOSVIDEO: cg14_set_video(sc, *(int *)data); break; /* these are for both FBIOSCURSOR and FBIOGCURSOR */ #define p ((struct fbcursor *)data) #define cc (&sc->sc_cursor) case FBIOGCURSOR: /* do not quite want everything here... */ p->set = FB_CUR_SETALL; /* close enough, anyway */ p->enable = cc->cc_enable; p->pos = cc->cc_pos; p->hot = cc->cc_hot; p->size = cc->cc_size; /* begin ugh ... can we lose some of this crap?? */ if (p->image != NULL) { count = cc->cc_size.y * 32 / NBBY; error = copyout(cc->cc_cplane, p->image, count); if (error) return (error); error = copyout(cc->cc_eplane, p->mask, count); if (error) return (error); } if (p->cmap.red != NULL) { error = cg14_get_cmap(&p->cmap, (union cg14cmap *)&cc->cc_color, 2); if (error) return (error); } else { p->cmap.index = 0; p->cmap.count = 2; } /* end ugh */ break; case FBIOSCURSOR: /* * For setcmap and setshape, verify parameters, so that * we do not get halfway through an update and then crap * out with the software state screwed up. */ v = p->set; if (v & FB_CUR_SETCMAP) { /* * This use of a temporary copy of the cursor * colormap is not terribly efficient, but these * copies are small (8 bytes)... */ tcm = cc->cc_color; error = cg14_put_cmap(&p->cmap, (union cg14cmap *)&tcm, 2); if (error) return (error); } if (v & FB_CUR_SETSHAPE) { if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32) return (EINVAL); count = p->size.y * 32 / NBBY; error = copyin(p->mask, eplane, count); if (error) return error; error = copyin(p->image, cplane, count); if (error) return error; } /* parameters are OK; do it */ if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) { if (v & FB_CUR_SETCUR) cc->cc_enable = p->enable; if (v & FB_CUR_SETPOS) cc->cc_pos = p->pos; if (v & FB_CUR_SETHOT) cc->cc_hot = p->hot; cg14_setcursor(sc); } if (v & FB_CUR_SETCMAP) { cc->cc_color = tcm; cg14_loadomap(sc); /* XXX defer to vertical retrace */ } if (v & FB_CUR_SETSHAPE) { cc->cc_size = p->size; count = p->size.y * 32 / NBBY; memset(cc->cc_eplane, 0, sizeof cc->cc_eplane); memcpy(cc->cc_eplane, eplane, count); memset(cc->cc_cplane, 0, sizeof cc->cc_cplane); memcpy(cc->cc_cplane, cplane, count); cg14_loadcursor(sc); } break; #undef cc #undef p case FBIOGCURPOS: *(struct fbcurpos *)data = sc->sc_cursor.cc_pos; break; case FBIOSCURPOS: sc->sc_cursor.cc_pos = *(struct fbcurpos *)data; cg14_setcursor(sc); break; case FBIOGCURMAX: /* max cursor size is 32x32 */ ((struct fbcurpos *)data)->x = 32; ((struct fbcurpos *)data)->y = 32; break; default: return (ENOTTY); } return (0); } /* * Undo the effect of an FBIOSVIDEO that turns the video off. */ static void cgfourteenunblank(dev) struct device *dev; { cg14_set_video((struct cgfourteen_softc *)dev, 1); } /* * Return the address that would map the given device at the given * offset, allowing for the given protection, or return -1 for error. * * The cg14 frame buffer can be mapped in either 8-bit or 32-bit mode * starting at the address stored in the PROM. In 8-bit mode, the X * channel is not present, and can be ignored. In 32-bit mode, mapping * at 0K delivers a 32-bpp buffer where the upper 8 bits select the X * channel information. We hardwire the Xlut to all zeroes to insure * that, regardless of this value, direct 24-bit color access will be * used. * * Alternatively, mapping the frame buffer at an offset of 16M seems to * tell the chip to ignore the X channel. XXX where does it get the X value * to use? */ paddr_t cgfourteenmmap(dev, off, prot) dev_t dev; off_t off; int prot; { struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; if (off & PGOFSET) panic("cgfourteenmmap"); if (off < 0) return (-1); #if defined(DEBUG) && defined(CG14_MAP_REGS) /* XXX: security hole */ /* * Map the control registers into user space. Should only be * used for debugging! */ if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) { off -= 0x10000000; if (bus_space_mmap(sc->sc_bustag, BUS_ADDR(sc->sc_physadr[CG14_CTL_IDX].sbr_slot, sc->sc_physadr[CG14_CTL_IDX].sbr_offset), off, prot, BUS_SPACE_MAP_LINEAR)); } #endif if ((u_int)off >= NOOVERLAY) off -= NOOVERLAY; else if ((u_int)off >= START) off -= START; else off = 0; /* * fb_size includes the overlay space only for the CG8. */ #ifdef CG14_CG8 if (off >= sc->sc_fb.fb_type.fb_size - START) #else if (off >= sc->sc_fb.fb_type.fb_size) #endif { #ifdef DEBUG printf("\nmmap request out of bounds: request 0x%x, " "bound 0x%x\n", (unsigned) off, (unsigned)sc->sc_fb.fb_type.fb_size); #endif return (-1); } return (bus_space_mmap(sc->sc_bustag, BUS_ADDR(sc->sc_physadr[CG14_PXL_IDX].oa_space, sc->sc_physadr[CG14_PXL_IDX].oa_base), off, prot, BUS_SPACE_MAP_LINEAR)); } /* * Miscellaneous helper functions */ /* Initialize the framebuffer, storing away useful state for later reset */ static void cg14_init(sc) struct cgfourteen_softc *sc; { u_int32_t *clut; u_int8_t *xlut; int i; /* * We stash away the following to restore on close: * * color look-up table 1 (sc->sc_saveclut) * x look-up table (sc->sc_savexlut) * control register (sc->sc_savectl) * cursor control register (sc->sc_savehwc) */ sc->sc_savectl = sc->sc_ctl->ctl_mctl; sc->sc_savehwc = sc->sc_hwc->curs_ctl; clut = (u_int32_t *) sc->sc_clut1->clut_lut; xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; for (i = 0; i < CG14_CLUT_SIZE; i++) { sc->sc_saveclut.cm_chip[i] = clut[i]; sc->sc_savexlut[i] = xlut[i]; } #ifdef CG14_CG8 /* * Enable the video, and put in 24 bit mode. */ sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | CG14_MCTL_POWERCTL; /* * Zero the xlut to enable direct-color mode */ memset(sc->sc_xlut, 0, CG14_CLUT_SIZE); #else /* * Enable the video and put it in 8 bit mode */ sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 | CG14_MCTL_POWERCTL; #endif } static void cg14_reset(sc) /* Restore the state saved on cg14_init */ struct cgfourteen_softc *sc; { u_int32_t *clut; u_int8_t *xlut; int i; /* * We restore the following, saved in cg14_init: * * color look-up table 1 (sc->sc_saveclut) * x look-up table (sc->sc_savexlut) * control register (sc->sc_savectl) * cursor control register (sc->sc_savehwc) * * Note that we don't touch the video enable bits in the * control register; otherwise, screenblank wouldn't work. */ sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL)) | (sc->sc_savectl & ~(CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL)); sc->sc_hwc->curs_ctl = sc->sc_savehwc; clut = (u_int32_t *) sc->sc_clut1->clut_lut; xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; for (i = 0; i < CG14_CLUT_SIZE; i++) { clut[i] = sc->sc_saveclut.cm_chip[i]; xlut[i] = sc->sc_savexlut[i]; } } /* Enable/disable video display; power down monitor if DPMS-capable */ static void cg14_set_video(sc, enable) struct cgfourteen_softc *sc; int enable; { /* * We can only use DPMS to power down the display if the chip revision * is greater than 0. */ if (enable) { if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL); else sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID; } else { if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID | CG14_MCTL_POWERCTL); else sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID; } } /* Get status of video display */ static int cg14_get_video(sc) struct cgfourteen_softc *sc; { return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0); } /* Read the software shadow colormap */ static int cg14_get_cmap(p, cm, cmsize) struct fbcmap *p; union cg14cmap *cm; int cmsize; { u_int i, start, count; u_char *cp; int error; start = p->index; count = p->count; if (start >= cmsize || count > cmsize - start) return (EINVAL); for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { error = copyout(&cp[3], &p->red[i], 1); if (error) return error; error = copyout(&cp[2], &p->green[i], 1); if (error) return error; error = copyout(&cp[1], &p->blue[i], 1); if (error) return error; } return (0); } /* Write the software shadow colormap */ static int cg14_put_cmap(p, cm, cmsize) struct fbcmap *p; union cg14cmap *cm; int cmsize; { u_int i, start, count; u_char *cp; u_char cmap[256][4]; int error; start = p->index; count = p->count; if (start >= cmsize || count > cmsize - start) return (EINVAL); memcpy(&cmap, &cm->cm_map, sizeof cmap); for (cp = &cmap[start][0], i = 0; i < count; cp += 4, i++) { error = copyin(&p->red[i], &cp[3], 1); if (error) return error; error = copyin(&p->green[i], &cp[2], 1); if (error) return error; error = copyin(&p->blue[i], &cp[1], 1); if (error) return error; cp[0] = 0; /* no alpha channel */ } memcpy(&cm->cm_map, &cmap, sizeof cmap); return (0); } static void cg14_load_hwcmap(sc, start, ncolors) struct cgfourteen_softc *sc; int start, ncolors; { /* XXX switch to auto-increment, and on retrace intr */ /* Setup pointers to source and dest */ u_int32_t *colp = &sc->sc_cmap.cm_chip[start]; volatile u_int32_t *lutp = &sc->sc_clut1->clut_lut[start]; /* Copy by words */ while (--ncolors >= 0) *lutp++ = *colp++; } /* * Load the cursor (overlay `foreground' and `background') colors. */ static void cg14_setcursor(sc) struct cgfourteen_softc *sc; { /* we need to subtract the hot-spot value here */ #define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f) sc->sc_hwc->curs_ctl = (sc->sc_cursor.cc_enable ? CG14_CURS_ENABLE : 0); sc->sc_hwc->curs_x = COORD(x); sc->sc_hwc->curs_y = COORD(y); #undef COORD } static void cg14_loadcursor(sc) struct cgfourteen_softc *sc; { volatile struct cg14curs *hwc; u_int edgemask, m; int i; /* * Keep the top size.x bits. Here we *throw out* the top * size.x bits from an all-one-bits word, introducing zeros in * the top size.x bits, then invert all the bits to get what * we really wanted as our mask. But this fails if size.x is * 32---a sparc uses only the low 5 bits of the shift count--- * so we have to special case that. */ edgemask = ~0; if (sc->sc_cursor.cc_size.x < 32) edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x); hwc = sc->sc_hwc; for (i = 0; i < 32; i++) { m = sc->sc_cursor.cc_eplane[i] & edgemask; hwc->curs_plane0[i] = m; hwc->curs_plane1[i] = m & sc->sc_cursor.cc_cplane[i]; } } static void cg14_loadomap(sc) struct cgfourteen_softc *sc; { /* set background color */ sc->sc_hwc->curs_color1 = sc->sc_cursor.cc_color.cm_chip[0]; /* set foreground color */ sc->sc_hwc->curs_color2 = sc->sc_cursor.cc_color.cm_chip[1]; }