path: root/sys/arch/vax/vsa/lcspx.c

/*	$OpenBSD: lcspx.c,v 1.3 2006/07/29 15:11:57 miod Exp $	*/
/*
 * Copyright (c) 2006 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice, this permission notice, and the disclaimer below
 * appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/*
 * Copyright (c) 2004 Blaz Antonic
 * All rights reserved.
 *
 * This software contains code written by Michael L. Hitch.
 *
 * 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 abovementioned copyrights
 * 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 <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/kernel.h>

#include <machine/vsbus.h>
#include <machine/scb.h>
#include <machine/sid.h>
#include <machine/cpu.h>

#include <uvm/uvm_extern.h>

#include <dev/cons.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>

#include <dev/ic/bt463reg.h>	/* actually it's a 459 here... */

#define	LCSPX_REG_ADDR		0x39302000	/* registers */
#define	LCSPX_REG1_ADDR		0x39b00000	/* more registers */
#define	LCSPX_RAMDAC_ADDR	0x39b10000	/* RAMDAC */
#define	LCSPX_RAMDAC_INTERLEAVE	0x00004000
#define	LCSPX_FB_ADDR		0x38000000	/* frame buffer */

#define	LCSPX_WIDTH	1280
#define	LCSPX_HEIGHT	1024
#define	LCSPX_FBSIZE	(LCSPX_WIDTH * LCSPX_HEIGHT)

int	lcspx_match(struct device *, void *, void *);
void	lcspx_attach(struct device *, struct device *, void *);

struct	lcspx_screen {
	struct rasops_info ss_ri;
	caddr_t		ss_addr;		/* frame buffer address */
	volatile u_int8_t *ss_ramdac[4];
};

/* for console */
struct lcspx_screen lcspx_consscr;

struct	lcspx_softc {
	struct device sc_dev;
	struct lcspx_screen *sc_scr;
	int	sc_nscreens;
};

struct cfattach lcspx_ca = {
	sizeof(struct lcspx_softc), lcspx_match, lcspx_attach,
};

struct	cfdriver lcspx_cd = {
	NULL, "lcspx", DV_DULL
};

struct wsscreen_descr lcspx_stdscreen = {
	"std",
};

const struct wsscreen_descr *_lcspx_scrlist[] = {
	&lcspx_stdscreen,
};

const struct wsscreen_list lcspx_screenlist = {
	sizeof(_lcspx_scrlist) / sizeof(struct wsscreen_descr *),
	_lcspx_scrlist,
};

int	lcspx_ioctl(void *, u_long, caddr_t, int, struct proc *);
paddr_t	lcspx_mmap(void *, off_t, int);
int	lcspx_alloc_screen(void *, const struct wsscreen_descr *,
	    void **, int *, int *, long *);
void	lcspx_free_screen(void *, void *);
int	lcspx_show_screen(void *, void *, int,
	    void (*) (void *, int, int), void *);

const struct wsdisplay_accessops lcspx_accessops = {
	lcspx_ioctl,
	lcspx_mmap,
	lcspx_alloc_screen,
	lcspx_free_screen,
	lcspx_show_screen,
	NULL,	/* load_font */
	NULL,	/* scrollback */
	NULL,	/* getchar */
	NULL	/* burner */
};

void	lcspx_resetcmap(struct lcspx_screen *);
int	lcspx_setup_screen(struct lcspx_screen *);

int
lcspx_match(struct device *parent, void *vcf, void *aux)
{
	struct vsbus_softc *sc = (void *)parent;
	struct vsbus_attach_args *va = aux;
	volatile u_int8_t *ch;
	int rc;

	switch (vax_boardtype) {
	default:
		return (0);

	case VAX_BTYP_49:
		if (va->va_paddr != LCSPX_REG_ADDR)
			return (0);

		break;
	}

	/*
	 * Check for video memory.
	 * We can not use badaddr() on these models.
	 */
	ch = (volatile u_int8_t *)vax_map_physmem(LCSPX_FB_ADDR, 1);
	rc = 1;
	*ch = 0x01;
	if ((*ch & 0x01) == 0)
		rc = 0;
	*ch = 0x00;
	if ((*ch & 0x01) != 0)
		rc = 0;
	vax_unmap_physmem((vaddr_t)ch, 1);

	sc->sc_mask = 0x04;	/* XXX - should be generated */
	scb_fake(0x120, 0x15);
	return (20);
}

void
lcspx_attach(struct device *parent, struct device *self, void *aux)
{
	struct lcspx_softc *sc = (struct lcspx_softc *)self;
	struct lcspx_screen *ss;
	struct wsemuldisplaydev_attach_args aa;
	int i, console;
	extern struct consdev wsdisplay_cons;

	console = (vax_confdata & 8) == 0 && cn_tab == &wsdisplay_cons;
	if (console) {
		ss = &lcspx_consscr;
		sc->sc_nscreens = 1;
	} else {
		ss = malloc(sizeof(struct lcspx_screen), M_DEVBUF, M_NOWAIT);
		if (ss == NULL) {
			printf(": can not allocate memory\n");
			return;
		}
		bzero(ss, sizeof(struct lcspx_screen));

		ss->ss_addr = (caddr_t)vax_map_physmem(LCSPX_FB_ADDR,
		    LCSPX_FBSIZE / VAX_NBPG);
		if (ss->ss_addr == NULL) {
			printf(": can not map frame buffer\n");
			goto fail1;
		}

		for (i = 0; i < 4; i++) {
			ss->ss_ramdac[i] = (volatile u_int8_t *)vax_map_physmem(
			    LCSPX_RAMDAC_ADDR + i * LCSPX_RAMDAC_INTERLEAVE, 1);
			if (ss->ss_ramdac[i] == NULL) {
				printf(": can not map RAMDAC registers\n");
				goto fail2;
			}
		}

		if (lcspx_setup_screen(ss) != 0) {
			printf(": initialization failed\n");
			goto fail2;
		}
	}
	sc->sc_scr = ss;

	printf(": 1280x1024x8 frame buffer\n");

	aa.console = console;
	aa.scrdata = &lcspx_screenlist;
	aa.accessops = &lcspx_accessops;
	aa.accesscookie = sc;

	config_found(self, &aa, wsemuldisplaydevprint);
	return;

fail2:
	for (i = 0; i < 4; i++)
		if (ss->ss_ramdac[i] != NULL)
			vax_unmap_physmem((vaddr_t)ss->ss_ramdac[i], 1);
	vax_unmap_physmem((vaddr_t)ss->ss_addr, LCSPX_FBSIZE / VAX_NBPG);
fail1:
	free(ss, M_DEVBUF);
}

/*
 * Initialize anything necessary for an emulating wsdisplay to work (i.e.
 * pick a font, initialize a rasops structure, setup the accessops callbacks.)
 */
int
lcspx_setup_screen(struct lcspx_screen *ss)
{
	struct rasops_info *ri = &ss->ss_ri;

	bzero(ri, sizeof(*ri));
	ri->ri_depth = 8;
	ri->ri_width = LCSPX_WIDTH;
	ri->ri_height = LCSPX_HEIGHT;
	ri->ri_stride = LCSPX_WIDTH;
	ri->ri_flg = RI_CLEAR | RI_CENTER;
	ri->ri_bits = (void *)ss->ss_addr;
	ri->ri_hw = ss;

	/*
	 * We can let rasops select our font here, as we do not need to
	 * use a font with a different bit order than rasops' defaults,
	 * unlike smg.
	 */

	/*
	 * Ask for an unholy big display, rasops will trim this to more
	 * reasonable values.
	 */
	if (rasops_init(ri, 160, 160) != 0)
		return (-1);

	lcspx_resetcmap(ss);

	lcspx_stdscreen.ncols = ri->ri_cols;
	lcspx_stdscreen.nrows = ri->ri_rows;
	lcspx_stdscreen.textops = &ri->ri_ops;
	lcspx_stdscreen.fontwidth = ri->ri_font->fontwidth;
	lcspx_stdscreen.fontheight = ri->ri_font->fontheight;
	lcspx_stdscreen.capabilities = ri->ri_caps;

	return (0);
}

int
lcspx_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
{
	struct lcspx_softc *sc = v;
	struct lcspx_screen *ss = sc->sc_scr;
	struct wsdisplay_fbinfo *wdf;

	switch (cmd) {
	case WSDISPLAYIO_GTYPE:
		*(u_int *)data = WSDISPLAY_TYPE_LCSPX;
		break;

	case WSDISPLAYIO_GINFO:
		wdf = (struct wsdisplay_fbinfo *)data;
		wdf->height = LCSPX_HEIGHT;
		wdf->width = LCSPX_WIDTH;
		wdf->depth = 8;
		wdf->cmsize = 256;
		break;

	case WSDISPLAYIO_LINEBYTES:
		*(u_int *)data = ss->ss_ri.ri_stride;
		break;

	case WSDISPLAYIO_GETCMAP:
	case WSDISPLAYIO_PUTCMAP:
		break;	/* XXX TBD */

	case WSDISPLAYIO_GVIDEO:
	case WSDISPLAYIO_SVIDEO:
		break;

	default:
		return (-1);
	}

	return (0);
}

paddr_t
lcspx_mmap(void *v, off_t offset, int prot)
{
	if (offset >= LCSPX_FBSIZE || offset < 0)
		return (-1);

	return (LCSPX_FB_ADDR + offset) >> PGSHIFT;
}

int
lcspx_alloc_screen(void *v, const struct wsscreen_descr *type, void **cookiep,
    int *curxp, int *curyp, long *defattrp)
{
	struct lcspx_softc *sc = v;
	struct lcspx_screen *ss = sc->sc_scr;
	struct rasops_info *ri = &ss->ss_ri;

	if (sc->sc_nscreens > 0)
		return (ENOMEM);

	*cookiep = ri;
	*curxp = *curyp = 0;
	ri->ri_ops.alloc_attr(ri, 0, 0, 0, defattrp);
	sc->sc_nscreens++;

	return (0);
}

void
lcspx_free_screen(void *v, void *cookie)
{
	struct lcspx_softc *sc = v;

	sc->sc_nscreens--;
}

int
lcspx_show_screen(void *v, void *cookie, int waitok,
    void (*cb)(void *, int, int), void *cbarg)
{
	return (0);
}

void
lcspx_resetcmap(struct lcspx_screen *ss)
{
	const u_char *color;
	u_int i;

	color = rasops_cmap;
	for (i = 0; i < 256; i++) {
		/*
		 * Reprogram the index every iteration, because the RAMDAC
		 * may not be in autoincrement mode. XXX fix this
		 */
		*(ss->ss_ramdac[BT463_REG_ADDR_LOW]) = i & 0xff;
		*(ss->ss_ramdac[BT463_REG_ADDR_HIGH]) = i >> 8;

		*(ss->ss_ramdac[BT463_REG_CMAP_DATA]) = *color++;
		*(ss->ss_ramdac[BT463_REG_CMAP_DATA]) = *color++;
		*(ss->ss_ramdac[BT463_REG_CMAP_DATA]) = *color++;
	}
}

/*
 * Console support code
 */

int	lcspxcnprobe(void);
void	lcspxcninit(void);

int
lcspxcnprobe()
{
	extern vaddr_t virtual_avail;
	vaddr_t tmp;
	volatile u_int8_t *ch;

	switch (vax_boardtype) {
	case VAX_BTYP_49:
		if ((vax_confdata & 8) != 0)
			break; /* doesn't use graphics console */

		/*
		 * Check for video memory.
		 * We can not use badaddr() on these models.
		 */
		tmp = virtual_avail;
		ch = (volatile u_int8_t *)tmp;
		ioaccess(tmp, LCSPX_FB_ADDR, 1);
		*ch = 0x01;
		if ((*ch & 0x01) == 0)
			break;
		*ch = 0x00;
		if ((*ch & 0x01) != 0)
			break;

		return (1);

	default:
		break;
	}

	return (0);
}

/*
 * Called very early to setup the glass tty as console.
 * Because it's called before the VM system is initialized, virtual memory
 * for the framebuffer can be stolen directly without disturbing anything.
 */
void
lcspxcninit()
{
	struct lcspx_screen *ss = &lcspx_consscr;
	extern vaddr_t virtual_avail;
	int i;
	long defattr;
	struct rasops_info *ri;

	ss->ss_addr = (caddr_t)virtual_avail;
	virtual_avail += LCSPX_FBSIZE;
	ioaccess((vaddr_t)ss->ss_addr, LCSPX_FB_ADDR, LCSPX_FBSIZE / VAX_NBPG);

	for (i = 0; i < 4; i++) {
		ss->ss_ramdac[i] = (volatile u_int8_t *)virtual_avail;
		virtual_avail += VAX_NBPG;
		ioaccess((vaddr_t)ss->ss_ramdac[i],
		    LCSPX_RAMDAC_ADDR + i * LCSPX_RAMDAC_INTERLEAVE, 1);
	}

	virtual_avail = round_page(virtual_avail);

	/* this had better not fail as we can't recover there */
	if (lcspx_setup_screen(ss) != 0)
		panic(__func__);

	ri = &ss->ss_ri;
	ri->ri_ops.alloc_attr(ri, 0, 0, 0, &defattr);
	wsdisplay_cnattach(&lcspx_stdscreen, ri, 0, 0, defattr);
}