diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2007-02-18 18:38:56 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-02-18 18:38:56 +0000 |
| commit | 69903c2c5193a967992a1b6f5ccf01c34d96cf77 (patch) | |
| tree | f652a6257493919aabfa314c1a41c269db21d307 /sys/dev/sbus | |
| parent | 4a288b1eeabc82de79b1788dd1e41e82f3decbf1 (diff) | |
Make it more apparent these boards have (crippled version of) vga-compatible
crtc. No functional change.
Diffstat (limited to 'sys/dev/sbus')
| -rw-r--r-- | sys/dev/sbus/mgx.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/sys/dev/sbus/mgx.c b/sys/dev/sbus/mgx.c index 978262b55dd..d813abc6fbc 100644 --- a/sys/dev/sbus/mgx.c +++ b/sys/dev/sbus/mgx.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mgx.c,v 1.7 2006/12/17 22:18:16 miod Exp $ */ +/* $OpenBSD: mgx.c,v 1.8 2007/02/18 18:38:55 miod Exp $ */ /* * Copyright (c) 2003, Miodrag Vallat. * All rights reserved. @@ -71,11 +71,17 @@ /* * MGX CRTC empirical constants */ -#define ADDRESS_REVERSE(x) ((x) ^ 0x03) -#define CRTC_COMMAND ADDRESS_REVERSE(0x03c4) -#define CRTC_DATA ADDRESS_REVERSE(0x03c5) -#define CRTC_CMAP ADDRESS_REVERSE(0x03c9) +#if _BYTE_ORDER == _LITTLE_ENDIAN +#define IO_ADDRESS(x) (x) +#else +#define IO_ADDRESS(x) ((x) ^ 0x03) +#endif +#define CRTC_INDEX IO_ADDRESS(0x03c4) +#define CRTC_DATA IO_ADDRESS(0x03c5) #define CD_DISABLEVIDEO 0x0020 +#define CMAP_READ_INDEX IO_ADDRESS(0x03c7) +#define CMAP_WRITE_INDEX IO_ADDRESS(0x03c8) +#define CMAP_DATA IO_ADDRESS(0x03c9) /* per-display variables */ struct mgx_softc { @@ -328,7 +334,7 @@ mgx_burner(void *v, u_int on, u_int flags) { struct mgx_softc *sc = v; - sc->sc_vidc[CRTC_COMMAND] = 1; /* trigger? */ + sc->sc_vidc[CRTC_INDEX] = 1; /* TS mode register */ if (on) sc->sc_vidc[CRTC_DATA] &= ~CD_DISABLEVIDEO; else @@ -358,12 +364,19 @@ mgx_loadcmap(struct mgx_softc *sc, int start, int ncolors) u_int8_t *color; int i; +#if 0 + sc->sc_vidc[CMAP_WRITE_INDEX] = start; + color = sc->sc_cmap + start * 3; +#else /* * Apparently there is no way to load an incomplete cmap to this * DAC. What a waste. */ - for (color = sc->sc_cmap, i = 0; i < 256 * 3; i++) - sc->sc_vidc[CRTC_CMAP] = *color++; + ncolors = 256; + color = sc->sc_cmap; +#endif + for (i = ncolors * 3; i != 0; i--) + sc->sc_vidc[CMAP_DATA] = *color++; } int |