Premiliminary driver for the Fujitsu AG-10e SBus frame buffer.

It will currently only work in 8bit mode, and without using the i128
acceleration features (but that's a good start for 3.3).

Written initially in november 2002, but it took some time in experiments
until I realized the ramdac had to be fed values shifted left by 16 bits in
order to work as intended, for no good reason.

So, I am now officially founding a ``RAMDAC Hater's Club''. Feel free to
apply.

1 files changed, 469 insertions, 0 deletions

diff --git a/sys/arch/sparc/dev/agten.c b/sys/arch/sparc/dev/agten.c
new file mode 100644
index 00000000000..0b5b4ec91bc
--- /dev/null
+++ b/sys/arch/sparc/dev/agten.c
@@ -0,0 +1,469 @@
+/*	$OpenBSD: agten.c,v 1.1 2003/03/06 21:48:28 miod Exp $	*/
+/*
+ * Copyright (c) 2002, 2003, Miodrag Vallat.
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * Fujitsu AG-10 framebuffer driver.
+ *
+ * The AG-10 is mostly made of:
+ * - a 3DLabs 300SX Glint chip, with two 6MB independant framebuffer spaces
+ * - a Number Nine Imagine 128 chip with its own 4MB framebuffer space
+ * - a Weitek P9100 with its own 2MB of framebuffer memory
+ * - an IBM PaletteDAC 561 ramdac
+ * - an Analog Devices ADSP-21062
+ *
+ * All of these chips (memory, registers, etc) are mapped in the SBus
+ * memory space associated to the board. What is unexpected, however, is
+ * that there are also PCI registers mappings for the first three chips!
+ *
+ * The three graphics chips act as overlays of each other, for the final
+ * video output.
+ *
+ * The PROM initialization will use the I128 framebuffer memory for output,
+ * which is ``above'' the P9100. The P9100 seems to only be there to provide
+ * a simple RAMDAC interface, but its frame buffer memory is accessible and
+ * will appear as an ``underlay'' plane.
+ */
+
+/*
+ * TODO
+ * - initialize the I128 in 32bit mode
+ * - use the i128 acceleration features
+ */
+
+#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/wscons/wscons_raster.h>
+#include <dev/rasops/rasops.h>
+#include <machine/fbvar.h>
+
+#include <dev/ic/ibm561reg.h>
+
+#include <sparc/dev/sbusvar.h>
+
+struct agten_cmap {
+	u_int8_t	cm_red[256];
+	u_int8_t	cm_green[256];
+	u_int8_t	cm_blue[256];
+};
+
+/* per-display variables */
+struct agten_softc {
+	struct	sunfb sc_sunfb;			/* common base part */
+	struct	sbusdev sc_sd;			/* sbus device */
+	struct	rom_reg sc_phys;		/* phys addr of h/w */
+	off_t	sc_physoffset;
+
+	volatile u_int32_t *sc_dac;
+	struct agten_cmap sc_cmap;		/* shadow color map */
+
+	volatile u_int32_t *sc_i128_fb;
+
+	int	sc_nscreens;
+};
+
+struct wsscreen_descr agten_stdscreen = {
+	"std",
+};
+
+const struct wsscreen_descr *agten_scrlist[] = {
+	&agten_stdscreen,
+};
+
+struct wsscreen_list agten_screenlist = {
+	sizeof(agten_scrlist) / sizeof(struct wsscreen_descr *), agten_scrlist
+};
+
+int agten_ioctl(void *, u_long, caddr_t, int, struct proc *);
+int agten_alloc_screen(void *, const struct wsscreen_descr *, void **,
+    int *, int *, long *);
+void agten_free_screen(void *, void *);
+int agten_show_screen(void *, void *, int, void (*cb)(void *, int, int),
+    void *);
+paddr_t agten_mmap(void *, off_t, int);
+void agten_reset(struct agten_softc *);
+void agten_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
+
+static __inline__ void ibm561_write(struct agten_softc *, u_int32_t, u_int32_t);
+int agten_getcmap(struct agten_cmap *, struct wsdisplay_cmap *);
+int agten_putcmap(struct agten_cmap *, struct wsdisplay_cmap *);
+void agten_loadcmap(struct agten_softc *, u_int, u_int);
+
+struct wsdisplay_accessops agten_accessops = {
+	agten_ioctl,
+	agten_mmap,
+	agten_alloc_screen,
+	agten_free_screen,
+	agten_show_screen,
+	NULL,   /* load_font */
+	NULL,   /* scrollback */
+	NULL,   /* getchar */
+	NULL,	/* burner */
+};
+
+int agtenmatch(struct device *, void *, void *);
+void agtenattach(struct device *, struct device *, void *);
+
+struct cfattach agten_ca = {
+	sizeof(struct agten_softc), agtenmatch, agtenattach
+};
+
+struct cfdriver agten_cd = {
+	NULL, "agten", DV_DULL
+};
+
+int
+agtenmatch(struct device *parent, void *vcf, void *aux)
+{
+	struct cfdata *cf = vcf;
+	struct confargs *ca = aux;
+	struct romaux *ra = &ca->ca_ra;
+
+	/*
+	 * Mask out invalid flags from the user.
+	 */
+	cf->cf_flags &= FB_USERMASK;
+
+	if (strcmp(ra->ra_name, "PFU,aga") != 0)
+		return (0);
+
+	return (1);
+}
+
+void
+agtenattach(struct device *parent, struct device *self, void *args)
+{
+	struct agten_softc *sc = (struct agten_softc *)self;
+	struct confargs *ca = args;
+	struct wsemuldisplaydev_attach_args waa;
+	int node, isconsole;
+	char *nam;
+
+	sc->sc_sunfb.sf_flags = self->dv_cfdata->cf_flags;
+
+	node = ca->ca_ra.ra_node;
+	nam = getpropstring(node, "model");
+	printf(": model %s", nam);
+
+	isconsole = node == fbnode;
+
+	sc->sc_phys = ca->ca_ra.ra_reg[0];
+
+	/*
+	 * Map the various beasts of this card.
+	 */
+
+	sc->sc_physoffset =
+	    (off_t)getpropint(node, "i128_fb_physaddr", 0x8000000);
+	sc->sc_i128_fb = mapiodev(ca->ca_ra.ra_reg, sc->sc_physoffset,
+	    getpropint(node, "i128_fb_size", 0x400000));
+	sc->sc_dac = mapiodev(ca->ca_ra.ra_reg,
+	    getpropint(node, "p9100_reg_physaddr", 0x10a0000) + 0x200,
+	    0x800 - 0x200);
+
+	/*
+	 * For some reason the agten does not use the canonical name for
+	 * properties, but uses an ffb_ prefix; and the linebytes property is
+	 * missing.
+	 * The following is a specific version of
+	 *   fb_setsize(&sc->sc_sunfb, 8, 1152, 900, node, BUS_SBUS);
+	 * using the correct property names.
+	 */
+#ifdef notyet
+	sc->sc_sunfb.sf_depth = 32;
+#else
+	sc->sc_sunfb.sf_depth = getpropint(node, "ffb_depth", 8);
+#endif
+	sc->sc_sunfb.sf_width = getpropint(node, "ffb_width", 1152);
+	sc->sc_sunfb.sf_height = getpropint(node, "ffb_height", 900);
+	sc->sc_sunfb.sf_linebytes =
+	    roundup(sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_depth) *
+	        sc->sc_sunfb.sf_depth / 8;
+	sc->sc_sunfb.sf_fbsize =
+	    sc->sc_sunfb.sf_height * sc->sc_sunfb.sf_linebytes;
+
+	printf(", %dx%d, depth %d\n",
+	    sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height,
+	    sc->sc_sunfb.sf_depth);
+
+	sc->sc_sunfb.sf_ro.ri_bits = (void *)sc->sc_i128_fb;
+	
+	sc->sc_sunfb.sf_ro.ri_hw = sc;
+	fbwscons_init(&sc->sc_sunfb, isconsole);
+	fbwscons_setcolormap(&sc->sc_sunfb, agten_setcolor);
+
+	agten_stdscreen.capabilities = sc->sc_sunfb.sf_ro.ri_caps;
+	agten_stdscreen.nrows = sc->sc_sunfb.sf_ro.ri_rows;
+	agten_stdscreen.ncols = sc->sc_sunfb.sf_ro.ri_cols;
+	agten_stdscreen.textops = &sc->sc_sunfb.sf_ro.ri_ops;
+
+	if (isconsole) {
+		fbwscons_console_init(&sc->sc_sunfb, &agten_stdscreen, -1,
+		    NULL);
+	}
+
+	sbus_establish(&sc->sc_sd, &sc->sc_sunfb.sf_dev);
+
+	waa.console = isconsole;
+	waa.scrdata = &agten_screenlist;
+	waa.accessops = &agten_accessops;
+	waa.accesscookie = sc;
+	config_found(self, &waa, wsemuldisplaydevprint);
+}
+
+int
+agten_ioctl(dev, cmd, data, flags, p)
+	void *dev;
+	u_long cmd;
+	caddr_t data;
+	int flags;
+	struct proc *p;
+{
+	struct agten_softc *sc = dev;
+	struct wsdisplay_cmap *cm;
+	struct wsdisplay_fbinfo *wdf;
+	int error;
+
+	switch (cmd) {
+	case WSDISPLAYIO_GTYPE:
+		*(u_int *)data = WSDISPLAY_TYPE_SUN24;
+		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_sunfb.sf_depth;
+		wdf->cmsize = (sc->sc_sunfb.sf_depth == 8) ? 256 : 0;
+		break;
+	case WSDISPLAYIO_LINEBYTES:
+		*(u_int *)data = sc->sc_sunfb.sf_linebytes;
+		break;
+
+	case WSDISPLAYIO_GETCMAP:
+		if (sc->sc_sunfb.sf_depth == 8) {
+			cm = (struct wsdisplay_cmap *)data;
+			error = agten_getcmap(&sc->sc_cmap, cm);
+			if (error)
+				return (error);
+		}
+		break;
+	case WSDISPLAYIO_PUTCMAP:
+		if (sc->sc_sunfb.sf_depth == 8) {
+			cm = (struct wsdisplay_cmap *)data;
+			error = agten_putcmap(&sc->sc_cmap, cm);
+			if (error)
+				return (error);
+			agten_loadcmap(sc, 0, 256);
+		}
+		break;
+
+	case WSDISPLAYIO_SVIDEO:
+	case WSDISPLAYIO_GVIDEO:
+	case WSDISPLAYIO_GCURPOS:
+	case WSDISPLAYIO_SCURPOS:
+	case WSDISPLAYIO_GCURMAX:
+	case WSDISPLAYIO_GCURSOR:
+	case WSDISPLAYIO_SCURSOR:
+	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
+agten_mmap(v, offset, prot)
+	void *v;
+	off_t offset;
+	int prot;
+{
+	struct agten_softc *sc = v;
+
+	if (offset & PGOFSET)
+		return (-1);
+
+	/* Allow mapping as a dumb framebuffer from offset 0 */
+	if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
+		return (REG2PHYS(&sc->sc_phys, sc->sc_physoffset + offset) |
+		    PMAP_NC);
+	}
+
+	return (-1);	/* not a user-map offset */
+}
+
+void
+agten_setcolor(v, index, r, g, b)
+	void *v;
+	u_int index;
+	u_int8_t r, g, b;
+{
+	struct agten_softc *sc = v;
+
+	sc->sc_cmap.cm_red[index] = r;
+	sc->sc_cmap.cm_green[index] = g;
+	sc->sc_cmap.cm_blue[index] = b;
+
+	agten_loadcmap(sc, index, 1);
+}
+
+int
+agten_alloc_screen(v, type, cookiep, curxp, curyp, attrp)
+	void *v;
+	const struct wsscreen_descr *type;
+	void **cookiep;
+	int *curxp, *curyp;
+	long *attrp;
+{
+	struct agten_softc *sc = v;
+
+	if (sc->sc_nscreens > 0)
+		return (ENOMEM);
+
+	*cookiep = &sc->sc_sunfb.sf_ro;
+	*curyp = 0;
+	*curxp = 0;
+	if (sc->sc_sunfb.sf_depth == 8) {
+		sc->sc_sunfb.sf_ro.ri_ops.alloc_attr(&sc->sc_sunfb.sf_ro,
+		    WSCOL_BLACK, WSCOL_WHITE, WSATTR_WSCOLORS, attrp);
+	} else {
+		sc->sc_sunfb.sf_ro.ri_ops.alloc_attr(&sc->sc_sunfb.sf_ro,
+		    0, 0, 0, attrp);
+	}
+	sc->sc_nscreens++;
+	return (0);
+}
+
+void
+agten_free_screen(v, cookie)
+	void *v;
+	void *cookie;
+{
+	struct agten_softc *sc = v;
+
+	sc->sc_nscreens--;
+}
+
+int
+agten_show_screen(v, cookie, waitok, cb, cbarg)
+	void *v;
+	void *cookie;
+	int waitok;
+	void (*cb)(void *, int, int);
+	void *cbarg;
+{
+	return (0);
+}
+
+int
+agten_getcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
+{
+	u_int index = rcm->index, count = rcm->count;
+	int error;
+
+	if (index >= 256 || count > 256 - index)
+		return (EINVAL);
+
+	if ((error = copyout(&cm->cm_red[index], rcm->red, count)) != 0)
+		return (error);
+	if ((error = copyout(&cm->cm_green[index], rcm->green, count)) != 0)
+		return (error);
+	if ((error = copyout(&cm->cm_blue[index], rcm->blue, count)) != 0)
+		return (error);
+
+	return (0);
+}
+
+int
+agten_putcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
+{
+	u_int index = rcm->index, count = rcm->count;
+	int error;
+
+	if (index >= 256 || count > 256 - index)
+		return (EINVAL);
+
+	if ((error = copyin(rcm->red, &cm->cm_red[index], count)) != 0)
+		return (error);
+	if ((error = copyin(rcm->green, &cm->cm_green[index], count)) != 0)
+		return (error);
+	if ((error = copyin(rcm->blue, &cm->cm_blue[index], count)) != 0)
+		return (error);
+
+	return (0);
+}
+
+static __inline__ void
+ibm561_write(struct agten_softc *sc, u_int32_t reg, u_int32_t value)
+{
+	/*
+	 * For some design reason the IBM561 PaletteDac needs to be fed
+	 * values shifted left by 16 bits. What happened to simplicity?
+	 */
+	sc->sc_dac[reg] = (value) << 16;
+}
+
+void
+agten_loadcmap(struct agten_softc *sc, u_int start, u_int ncolors)
+{
+	int i;
+	u_int8_t *red, *green, *blue;
+
+	ibm561_write(sc, IBM561_ADDR_LOW,
+	    (IBM561_CMAP_TABLE + start) & 0xff);
+	ibm561_write(sc, IBM561_ADDR_HIGH,
+	    ((IBM561_CMAP_TABLE + start) >> 8) & 0xff);
+
+	red = sc->sc_cmap.cm_red;
+	green = sc->sc_cmap.cm_green;
+	blue = sc->sc_cmap.cm_blue;
+	for (i = start; i < start + ncolors; i++) {
+		ibm561_write(sc, IBM561_CMD_CMAP, *red++);
+		ibm561_write(sc, IBM561_CMD_CMAP, *green++);
+		ibm561_write(sc, IBM561_CMD_CMAP, *blue++);
+	}
+}