/* $NetBSD: pcdisplay.c,v 1.7 1999/12/06 19:25:59 drochner Exp $ */ /* * Copyright (c) 1998 * Matthias Drochner. 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. * 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 Matthias Drochner. * 4. 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 ``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. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct pcdisplay_config { struct pcdisplayscreen pcs; struct pcdisplay_handle dc_ph; int mono; }; struct pcdisplay_softc { struct device sc_dev; struct pcdisplay_config *sc_dc; int nscreens; }; static int pcdisplayconsole, pcdisplay_console_attached; static struct pcdisplay_config pcdisplay_console_dc; int pcdisplay_match __P((struct device *, struct cfdata *, void *)); void pcdisplay_attach __P((struct device *, struct device *, void *)); static int pcdisplay_is_console __P((bus_space_tag_t)); static int pcdisplay_probe_col __P((bus_space_tag_t, bus_space_tag_t)); static int pcdisplay_probe_mono __P((bus_space_tag_t, bus_space_tag_t)); static void pcdisplay_init __P((struct pcdisplay_config *, bus_space_tag_t, bus_space_tag_t, int)); static int pcdisplay_alloc_attr __P((void *, int, int, int, long *)); struct cfattach pcdisplay_ca = { sizeof(struct pcdisplay_softc), pcdisplay_match, pcdisplay_attach, }; const struct wsdisplay_emulops pcdisplay_emulops = { pcdisplay_cursor, pcdisplay_mapchar, pcdisplay_putchar, pcdisplay_copycols, pcdisplay_erasecols, pcdisplay_copyrows, pcdisplay_eraserows, pcdisplay_alloc_attr }; const struct wsscreen_descr pcdisplay_scr = { "80x25", 80, 25, &pcdisplay_emulops, 0, 0, /* no font support */ WSSCREEN_REVERSE /* that's minimal... */ }; const struct wsscreen_descr *_pcdisplay_scrlist[] = { &pcdisplay_scr, }; const struct wsscreen_list pcdisplay_screenlist = { sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), _pcdisplay_scrlist }; static int pcdisplay_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); static int pcdisplay_mmap __P((void *, off_t, int)); static int pcdisplay_alloc_screen __P((void *, const struct wsscreen_descr *, void **, int *, int *, long *)); static void pcdisplay_free_screen __P((void *, void *)); static int pcdisplay_show_screen __P((void *, void *, int, void (*) (void *, int, int), void *)); const struct wsdisplay_accessops pcdisplay_accessops = { pcdisplay_ioctl, pcdisplay_mmap, pcdisplay_alloc_screen, pcdisplay_free_screen, pcdisplay_show_screen, 0 /* load_font */ }; static int pcdisplay_probe_col(iot, memt) bus_space_tag_t iot, memt; { bus_space_handle_t memh, ioh_6845; u_int16_t oldval, val; if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) return (0); oldval = bus_space_read_2(memt, memh, 0); bus_space_write_2(memt, memh, 0, 0xa55a); val = bus_space_read_2(memt, memh, 0); bus_space_write_2(memt, memh, 0, oldval); bus_space_unmap(memt, memh, 0x8000); if (val != 0xa55a) return (0); if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) return (0); bus_space_unmap(iot, ioh_6845, 0x10); return (1); } static int pcdisplay_probe_mono(iot, memt) bus_space_tag_t iot, memt; { bus_space_handle_t memh, ioh_6845; u_int16_t oldval, val; if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) return (0); oldval = bus_space_read_2(memt, memh, 0); bus_space_write_2(memt, memh, 0, 0xa55a); val = bus_space_read_2(memt, memh, 0); bus_space_write_2(memt, memh, 0, oldval); bus_space_unmap(memt, memh, 0x8000); if (val != 0xa55a) return (0); if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) return (0); bus_space_unmap(iot, ioh_6845, 0x10); return (1); } static void pcdisplay_init(dc, iot, memt, mono) struct pcdisplay_config *dc; bus_space_tag_t iot, memt; int mono; { struct pcdisplay_handle *ph = &dc->dc_ph; int cpos; ph->ph_iot = iot; ph->ph_memt = memt; dc->mono = mono; if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 0, &ph->ph_memh)) panic("pcdisplay_init: cannot map memory"); if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 0, &ph->ph_ioh_6845)) panic("pcdisplay_init: cannot map io"); /* * initialize the only screen */ dc->pcs.hdl = ph; dc->pcs.type = &pcdisplay_scr; dc->pcs.active = 1; dc->pcs.mem = NULL; cpos = pcdisplay_6845_read(ph, cursorh) << 8; cpos |= pcdisplay_6845_read(ph, cursorl); /* make sure we have a valid cursor position */ if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) cpos = 0; dc->pcs.dispoffset = 0; dc->pcs.vc_crow = cpos / pcdisplay_scr.ncols; dc->pcs.vc_ccol = cpos % pcdisplay_scr.ncols; dc->pcs.cursoron = 1; } int pcdisplay_match(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct isa_attach_args *ia = aux; int mono; /* If values are hardwired to something that they can't be, punt. */ if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x3d0 && ia->ia_iobase != 0x3b0) || /* ia->ia_iosize != 0 || XXX isa.c */ (ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xb8000 && ia->ia_maddr != 0xb0000) || (ia->ia_msize != 0 && ia->ia_msize != 0x8000) || ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) return (0); if (pcdisplay_is_console(ia->ia_iot)) mono = pcdisplay_console_dc.mono; else if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) mono = 0; else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) mono = 1; else return (0); ia->ia_iobase = mono ? 0x3b0 : 0x3d0; ia->ia_iosize = 0x10; ia->ia_maddr = mono ? 0xb0000 : 0xb8000; ia->ia_msize = 0x8000; return (1); } void pcdisplay_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct isa_attach_args *ia = aux; struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; int console; struct pcdisplay_config *dc; struct wsemuldisplaydev_attach_args aa; printf("\n"); console = pcdisplay_is_console(ia->ia_iot); if (console) { dc = &pcdisplay_console_dc; sc->nscreens = 1; pcdisplay_console_attached = 1; } else { dc = malloc(sizeof(struct pcdisplay_config), M_DEVBUF, M_WAITOK); if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); else panic("pcdisplay_attach: display disappeared"); } sc->sc_dc = dc; aa.console = console; aa.scrdata = &pcdisplay_screenlist; aa.accessops = &pcdisplay_accessops; aa.accesscookie = sc; config_found(self, &aa, wsemuldisplaydevprint); } int pcdisplay_cnattach(iot, memt) bus_space_tag_t iot, memt; { int mono; if (pcdisplay_probe_col(iot, memt)) mono = 0; else if (pcdisplay_probe_mono(iot, memt)) mono = 1; else return (ENXIO); pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, pcdisplay_console_dc.pcs.vc_ccol, pcdisplay_console_dc.pcs.vc_crow, FG_LIGHTGREY | BG_BLACK); pcdisplayconsole = 1; return (0); } static int pcdisplay_is_console(iot) bus_space_tag_t iot; { if (pcdisplayconsole && !pcdisplay_console_attached && iot == pcdisplay_console_dc.dc_ph.ph_iot) return (1); return (0); } static int pcdisplay_ioctl(v, cmd, data, flag, p) void *v; u_long cmd; caddr_t data; int flag; struct proc *p; { /* * XXX "do something!" */ return (-1); } static int pcdisplay_mmap(v, offset, prot) void *v; off_t offset; int prot; { return (-1); } static int pcdisplay_alloc_screen(v, type, cookiep, curxp, curyp, defattrp) void *v; const struct wsscreen_descr *type; void **cookiep; int *curxp, *curyp; long *defattrp; { struct pcdisplay_softc *sc = v; if (sc->nscreens > 0) return (ENOMEM); *cookiep = sc->sc_dc; *curxp = 0; *curyp = 0; *defattrp = FG_LIGHTGREY | BG_BLACK; sc->nscreens++; return (0); } static void pcdisplay_free_screen(v, cookie) void *v; void *cookie; { struct pcdisplay_softc *sc = v; if (sc->sc_dc == &pcdisplay_console_dc) panic("pcdisplay_free_screen: console"); sc->nscreens--; } static int pcdisplay_show_screen(v, cookie, waitok, cb, cbarg) void *v; void *cookie; int waitok; void (*cb) __P((void *, int, int)); void *cbarg; { #ifdef DIAGNOSTIC struct pcdisplay_softc *sc = v; if (cookie != sc->sc_dc) panic("pcdisplay_show_screen: bad screen"); #endif return (0); } static int pcdisplay_alloc_attr(id, fg, bg, flags, attrp) void *id; int fg, bg; int flags; long *attrp; { if (flags & WSATTR_REVERSE) *attrp = FG_BLACK | BG_LIGHTGREY; else *attrp = FG_LIGHTGREY | BG_BLACK; return (0); }