NetBSD/sys/arch/alpha/tc/cfb.c

/* $NetBSD: cfb.c,v 1.13 1997/09/25 01:32:09 thorpej Exp $ */

/*
 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: cfb.c,v 1.13 1997/09/25 01:32:09 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/ioctl.h>

#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/conf.h>

#include <dev/tc/tcvar.h>
#include <machine/cfbreg.h>
#include <alpha/tc/cfbvar.h>
#if 0
#include <alpha/tc/bt459reg.h>
#endif

#include <dev/rcons/raster.h>
#include <alpha/wscons/wscons_raster.h>
#include <alpha/wscons/wsconsvar.h>
#include <machine/fbio.h>

#include <machine/autoconf.h>
#include <machine/pte.h>

int	cfbmatch __P((struct device *, struct cfdata *, void *));
void	cfbattach __P((struct device *, struct device *, void *));
int	cfbprint __P((void *, const char *));

struct cfattach cfb_ca = {
	sizeof(struct cfb_softc), cfbmatch, cfbattach,
};

struct cfdriver cfb_cd = {
	NULL, "cfb", DV_DULL,
};

void	cfb_getdevconfig __P((tc_addr_t dense_addr, struct cfb_devconfig *dc));
struct cfb_devconfig cfb_console_dc;

struct wscons_emulfuncs cfb_emulfuncs = {
	rcons_cursor,			/* could use hardware cursor; punt */
	rcons_putstr,
	rcons_copycols,
	rcons_erasecols,
	rcons_copyrows,
	rcons_eraserows,
	10,				/* skip 10 rows per scroll */
};

int	cfbioctl __P((void *, u_long, caddr_t, int, struct proc *));
int	cfbmmap __P((void *, off_t, int));

int	cfbintr __P((void *));

int
cfbmatch(parent, match, aux)
	struct device *parent;
	struct cfdata *match;
	void *aux;
{
	struct tc_attach_args *ta = aux;

	if (strncmp("PMAG-BA ", ta->ta_modname, TC_ROM_LLEN) != 0)
		return (0);

	return (10);
}

void
cfb_getdevconfig(dense_addr, dc)
	tc_addr_t dense_addr;
	struct cfb_devconfig *dc;
{
	struct raster *rap;
	struct rcons *rcp;
	char *ramdacregp;
	int i;

	dc->dc_vaddr = dense_addr;
	dc->dc_paddr = ALPHA_K0SEG_TO_PHYS(dc->dc_vaddr);	/* XXX */
	dc->dc_size = CFB_SIZE;

	ramdacregp = (char *)dc->dc_vaddr + CFB_RAMDAC_OFFSET;

	dc->dc_wid = 1024;
	dc->dc_ht = 864;
	dc->dc_depth = 8;			/* 8 plane */
	dc->dc_rowbytes = dc->dc_wid * (dc->dc_depth / 8);

	dc->dc_videobase = dc->dc_vaddr + CFB_FB_OFFSET;
	
	/* Initialize the RAMDAC/colormap */
	/* start XXX XXX XXX */
	(*(volatile u_int32_t *)(ramdacregp + CFB_RAMDAC_ADDRLOW)) = 0;
	(*(volatile u_int32_t *)(ramdacregp + CFB_RAMDAC_ADDRHIGH)) = 0;
	tc_wmb();
	for (i = 0; i < 256; i++) {
		(*(volatile u_int32_t *)(ramdacregp + CFB_RAMDAC_CMAPDATA)) =
		    i ? 0xff : 0;
		tc_wmb();
		(*(volatile u_int32_t *)(ramdacregp + CFB_RAMDAC_CMAPDATA)) =
		    i ? 0xff : 0;
		tc_wmb();
		(*(volatile u_int32_t *)(ramdacregp + CFB_RAMDAC_CMAPDATA)) =
		    i ? 0xff : 0;
		tc_wmb();
	}
	/* end XXX XXX XXX */
	
	/* clear the screen */
	for (i = 0; i < dc->dc_ht * dc->dc_rowbytes; i += sizeof(u_int32_t))
		*(u_int32_t *)(dc->dc_videobase + i) = 0x00000000;

	rap = &dc->dc_raster;
	rap->width = dc->dc_wid;
	rap->height = dc->dc_ht;
	rap->depth = 8;
	rap->linelongs = dc->dc_rowbytes / sizeof(u_int32_t);
	rap->pixels = (u_int32_t *)dc->dc_videobase;

	/* initialize the raster console blitter */
	rcp = &dc->dc_rcons;
	rcp->rc_sp = rap;
	rcp->rc_crow = rcp->rc_ccol = -1;
	rcp->rc_crowp = &rcp->rc_crow;
	rcp->rc_ccolp = &rcp->rc_ccol;
	rcons_init(rcp, 34, 80);
}

void
cfbattach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct cfb_softc *sc = (struct cfb_softc *)self;
	struct tc_attach_args *ta = aux;
	struct wscons_attach_args waa;
	struct wscons_odev_spec *wo;
	int console;

	console = 0;					/* XXX */
	if (console)
		sc->sc_dc = &cfb_console_dc;
	else {
		sc->sc_dc = (struct cfb_devconfig *)
		    malloc(sizeof(struct cfb_devconfig), M_DEVBUF, M_WAITOK);
		cfb_getdevconfig(ta->ta_addr, sc->sc_dc);
	}
	if (sc->sc_dc->dc_vaddr == NULL) {
		printf(": couldn't map memory space; punt!\n");
		return;
	}
	printf(": %d x %d, %dbpp\n", sc->sc_dc->dc_wid, sc->sc_dc->dc_ht,
	    sc->sc_dc->dc_depth);

	/* Establish an interrupt handler, and clear any pending interrupts */
        tc_intr_establish(parent, ta->ta_cookie, TC_IPL_TTY, cfbintr, sc);
	*(volatile u_int32_t *)(sc->sc_dc->dc_vaddr + CFB_IREQCTRL_OFFSET) = 0;

	/* initialize the raster */
	waa.waa_isconsole = console;
	wo = &waa.waa_odev_spec;

	wo->wo_emulfuncs = &cfb_emulfuncs;
	wo->wo_emulfuncs_cookie = &sc->sc_dc->dc_rcons;

	wo->wo_ioctl = cfbioctl;
	wo->wo_mmap = cfbmmap;
	wo->wo_miscfuncs_cookie = sc;

	wo->wo_nrows = sc->sc_dc->dc_rcons.rc_maxrow;
	wo->wo_ncols = sc->sc_dc->dc_rcons.rc_maxcol;
	wo->wo_crow = 0;
	wo->wo_ccol = 0;

	config_found(self, &waa, cfbprint);
}

int
cfbprint(aux, pnp)
	void *aux;
	const char *pnp;
{

	if (pnp)
		printf("wscons at %s", pnp);
	return (UNCONF);
}

int
cfbioctl(v, cmd, data, flag, p)
	void *v;
	u_long cmd;
	caddr_t data;
	int flag;
	struct proc *p;
{
	struct cfb_softc *sc = v;
	struct cfb_devconfig *dc = sc->sc_dc;

	switch (cmd) {
	case FBIOGTYPE:
#define fbt ((struct fbtype *)data)
		fbt->fb_type = FBTYPE_CFB;
		fbt->fb_height = sc->sc_dc->dc_ht;
		fbt->fb_width = sc->sc_dc->dc_wid;
		fbt->fb_depth = sc->sc_dc->dc_depth;
		fbt->fb_cmsize = 256;		/* XXX ??? */
		fbt->fb_size = sc->sc_dc->dc_size;
#undef fbt
		return (0);

#if 0
	case FBIOPUTCMAP:
		return (*tgar->tgar_set_cmap)(dc, (struct fbcmap *)data);

	case FBIOGETCMAP:
		return (*tgar->tgar_get_cmap)(dc, (struct fbcmap *)data);
#endif

	case FBIOGATTR:
		return (ENOTTY);			/* XXX ? */

#if 0
	case FBIOSVIDEO:
		if (*(int *)data == FBVIDEO_OFF)
			cfb_blank(sc->sc_dc);
		else
			cfb_unblank(sc->sc_dc);
		return (0);
#endif

	case FBIOGVIDEO:
		*(int *)data = dc->dc_blanked ? FBVIDEO_OFF : FBVIDEO_ON;
		return (0);

#if 0
	case FBIOSCURSOR:
		return (*tgar->tgar_set_cursor)(dc, (struct fbcursor *)data);

	case FBIOGCURSOR:
		return (*tgar->tgar_get_cursor)(dc, (struct fbcursor *)data);

	case FBIOSCURPOS:
		return (*tgar->tgar_set_curpos)(dc, (struct fbcurpos *)data);

	case FBIOGCURPOS:
		return (*tgar->tgar_get_curpos)(dc, (struct fbcurpos *)data);

	case FBIOGCURMAX:
		return (*tgar->tgar_get_curmax)(dc, (struct fbcurpos *)data);
#endif
	}
	return (-1);
}

int
cfbmmap(v, offset, prot)
	void *v;
	off_t offset;
	int prot;
{
	struct cfb_softc *sc = v;

	if (offset > CFB_SIZE)
		return -1;
	return alpha_btop(sc->sc_dc->dc_paddr + offset);
}

int
cfbintr(v)
	void *v;
{
	struct cfb_softc *sc = v;

	*(volatile u_int32_t *)(sc->sc_dc->dc_vaddr + CFB_IREQCTRL_OFFSET) = 0;

	return (1);
}

#if 0
void
tga_console(bc, pc, bus, device, function)
	bus_chipset_tag_t bc;
	pci_chipset_tag_t pc;
	int bus, device, function;
{
	struct tga_devconfig *dcp = &tga_console_dc;
	struct wscons_odev_spec wo;

	tga_getdevconfig(bc, pc, pci_make_tag(pc, bus, device, function), dcp);

	/* sanity checks */
	if (dcp->dc_vaddr == NULL)
		panic("tga_console(%d, %d): couldn't map memory space",
		    device, function);
	if (dcp->dc_tgaconf == NULL)
		panic("tga_console(%d, %d): unknown board configuration",
		    device, function);

	/*
	 * Initialize the RAMDAC but DO NOT allocate any private storage.
	 * Initialization includes disabling cursor, setting a sane
	 * colormap, etc.  It will be reinitialized in tgaattach().
	 */
	(*dcp->dc_tgaconf->tgac_ramdac->tgar_init)(dcp, 0);

	wo.wo_ef = &tga_emulfuncs;
	wo.wo_efa = &dcp->dc_rcons;
	wo.wo_nrows = dcp->dc_rcons.rc_maxrow;
	wo.wo_ncols = dcp->dc_rcons.rc_maxcol;
	wo.wo_crow = 0;
	wo.wo_ccol = 0;
	/* ioctl and mmap are unused until real attachment. */

	wscons_attach_console(&wo);
}
#endif