* LCG accelerated framebuffer driver

/* $NetBSD: lcg.c,v 1.13 2025/02/28 13:13:41 hans Exp $ */
/*
* LCG accelerated framebuffer driver
* Copyright (c) 2003, 2004 Blaz Antonic
* 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 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.
*/
/*
* Resurrection and dumb framebuffer mode by Björn Johannesson
* [email protected] in December 2014
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lcg.c,v 1.13 2025/02/28 13:13:41 hans Exp $");

#define LCG_NO_ACCEL

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/time.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>

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

#include <dev/cons.h>

#include <dev/dec/dzreg.h>
#include <dev/dec/dzvar.h>
#include <dev/dec/dzkbdvar.h>

#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wscons_callbacks.h>
#include <dev/wsfont/wsfont.h>

#include "machine/scb.h"

#include "dzkbd.h"

/* Screen hardware defs */

#define LCG_FB_ADDR 0x21801000 /* Frame buffer */

/* FIFO defines */
#define LCG_FIFO_SIZE 0x10000 /* 64 KB */
#define LCG_FIFO_WIN_ADDR 0x20180000
#define LCG_FIFO_WIN_SIZE VAX_NBPG
#define LCG_FIFO_ALIGN 0x10000

/* font rendering defines */
#define LCG_FONT_ADDR (LCG_FB_ADDR + lcg_fb_size)
#define LCG_FONT_STORAGE_SIZE 0x40000 /* 16 KB, enough to accommodate 16x32 font bitmaps */

/* register space defines */
#define LCG_REG_ADDR 0x20100000 /* LCG registers */
#define LCG_REG_SIZE 0x4000 /* 16384 bytes */
#define LCG_REG(reg) regaddr[(reg / 4)]

/* LUT defines */
#define LCG_LUT_ADDR 0x21800800 /* LUT right before onscreen FB */
#define LCG_LUT_OFFSET 0x00000800
#define LCG_LUT_SIZE 0x800 /* 2048 bytes */

#define LCG_BG_COLOR WSCOL_BLACK
#define LCG_FG_COLOR WSCOL_WHITE

#define LCG_CONFIG 0x200f0010 /* LCG model information */

/* implement sanity checks at certain points to ensure safer operation */
#define LCG_SAFE
//#define LCG_DEBUG

static int lcg_match(struct device *, struct cfdata *, void *);
static void lcg_attach(struct device *, struct device *, void *);

struct lcg_softc {
bus_dmamap_t sc_dm;
};

CFATTACH_DECL_NEW(lcg, sizeof(struct lcg_softc),
lcg_match, lcg_attach, NULL, NULL);

static void lcg_cursor(void *, int, int, int);
static int lcg_mapchar(void *, int, unsigned int *);
static void lcg_putchar(void *, int, int, u_int, long);
static void lcg_copycols(void *, int, int, int,int);
static void lcg_erasecols(void *, int, int, int, long);
static void lcg_copyrows(void *, int, int, int);
static void lcg_eraserows(void *, int, int, long);
static int lcg_allocattr(void *, int, int, int, long *);
static int lcg_get_cmap(struct wsdisplay_cmap *);
static int lcg_set_cmap(struct wsdisplay_cmap *);
static void lcg_init_common(struct device *, struct vsbus_attach_args *);

const struct wsdisplay_emulops lcg_emulops = {
lcg_cursor,
lcg_mapchar,
lcg_putchar,
lcg_copycols,
lcg_erasecols,
lcg_copyrows,
lcg_eraserows,
lcg_allocattr
};

static char lcg_stdscreen_name[10] = "160x68";
struct wsscreen_descr lcg_stdscreen = {
lcg_stdscreen_name, 160, 68, /* dynamically set */
&lcg_emulops,
8, 15, /* dynamically set */
WSSCREEN_UNDERLINE|WSSCREEN_REVERSE|WSSCREEN_WSCOLORS,
};

const struct wsscreen_descr *_lcg_scrlist[] = {
&lcg_stdscreen,
};

const struct wsscreen_list lcg_screenlist = {
sizeof(_lcg_scrlist) / sizeof(struct wsscreen_descr *),
_lcg_scrlist,
};

static char *lcgaddr;
static char *lutaddr;
static volatile long *regaddr;
static volatile long *fifoaddr;
#ifndef LCG_NO_ACCEL
static char *fontaddr;
#endif

static int lcg_xsize;
static int lcg_ysize;
static int lcg_depth;
static int lcg_cols;
static int lcg_rows;
static int lcg_onerow;
static int lcg_fb_size;
static int lcg_glyph_size; /* bitmap size in bits */

static char *cursor;

static int cur_on;

static int cur_fg, cur_bg;

/* Our current hardware colormap */
static struct hwcmap256 {
#define CMAP_SIZE 256 /* 256 R/G/B entries */
u_int8_t r[CMAP_SIZE];
u_int8_t g[CMAP_SIZE];
u_int8_t b[CMAP_SIZE];
} lcg_cmap;

/* The default colormap */
static struct {
u_int8_t r[8];
u_int8_t g[8];
u_int8_t b[8];
} lcg_default_cmap = {
{ 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff },
{ 0x00, 0x00, 0xff, 0x7f, 0x00, 0x00, 0xff, 0xff },
{ 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff }
};

struct wsdisplay_font lcg_font;
static u_char *qf;
static u_short *qf2;

#define QCHAR(c) (c < lcg_font.firstchar ? 0 : \
(c >= (lcg_font.firstchar + lcg_font.numchars) ? 0 : c - lcg_font.firstchar))
#define QFONT(c,line) ((lcg_font.stride == 2 ? \
qf2[QCHAR(c) * lcg_font.fontheight + line] : \
qf[QCHAR(c) * lcg_font.fontheight + line]))
#define LCG_ADDR(row, col, line, dot) \
lcgaddr[((col) * lcg_font.fontwidth) + ((row) * lcg_font.fontheight * lcg_xsize) + \
(line) * lcg_xsize + dot]

static int lcg_ioctl(void *, void *, u_long, void *, int, struct lwp *);
static paddr_t lcg_mmap(void *, void *, off_t, int);
static int lcg_alloc_screen(void *, const struct wsscreen_descr *,
void **, int *, int *, long *);
static void lcg_free_screen(void *, void *);
static int lcg_show_screen(void *, void *, int,
void (*) (void *, int, int), void *);
static void lcg_crsr_blink(void *);

/* LCG HW accel functions */
#ifndef LCG_NO_ACCEL
static void fifo_put(long data);
static int fifo_fill(int iterations);
static u_char fifo_counter = 0;

static void blkcpy(long source, long dest, int xdim, int ydim);
static void blkset(long dest, int xdim, int ydim, char color);
static void renderchar(long source, long dest, int xdim, int ydim, char fg, char bg);
#endif /* LCG_NO_ACCEL */

const struct wsdisplay_accessops lcg_accessops = {
lcg_ioctl,
lcg_mmap,
lcg_alloc_screen,
lcg_free_screen,
lcg_show_screen,
0 /* load_font */
};

/* TODO allocate ss_image dynamically for consoles beyond first one */
struct lcg_screen {
int ss_curx;
int ss_cury;
int ss_cur_fg;
int ss_cur_bg;
struct {
u_char data; /* Image character */
u_char attr; /* Attribute: 80/70/08/07 */
} ss_image[160 * 128]; /* allow for maximum possible cell matrix */
};
#define LCG_ATTR_UNDERLINE 0x80
#define LCG_BG_MASK 0x70
#define LCG_ATTR_REVERSE 0x08
#define LCG_FG_MASK 0x07

static struct lcg_screen lcg_conscreen;
static struct lcg_screen *curscr;
static struct lcg_screen *savescr;

static callout_t lcg_cursor_ch;

#ifndef LCG_NO_ACCEL
void fifo_put(long data)
{
fifo_counter &= 0x3;
fifoaddr[fifo_counter] = data;
fifo_counter++;
}

int fifo_fill(int iterations)
{
long status;
int counter = 0;

while (fifo_counter % 4)
fifo_put(0);

#ifdef LCG_SAFE
status = LCG_REG(LCG_REG_GRAPHICS_SUB_STATUS);
while ((counter < iterations) && ((status & 0x80000000) == 0x80000000)) {
delay(1000);
status = LCG_REG(LCG_REG_GRAPHICS_SUB_STATUS);
counter++;
}
#endif

if (counter == 0)
return 0;
else
return 1;
}

void blkcpy(long source, long dest, int xdim, int ydim)
{
int err;

#ifdef LCG_SAFE
if ((source < LCG_FB_ADDR) || (source > LCG_FB_ADDR + lcg_fb_size)) {
printf("lcg: blkcpy: invalid source 0x%lx\n", source);
return;
}
if ((dest < LCG_FB_ADDR) || (dest > LCG_FB_ADDR + lcg_fb_size)) {
printf("lcg: blkcpy: invalid destination 0x%lx\n", dest);
return;
}
#endif

#ifdef LCG_SAFE
fifo_put(0x0c010000 | (cur_fg & 0xff));
#endif
fifo_put(0x01020006);

fifo_put(0x06800000);
fifo_put(source);
fifo_put(lcg_xsize);

fifo_put(0x05800000);
fifo_put(dest);
fifo_put(lcg_xsize);

fifo_put(0x03400000);
fifo_put(0xff);

fifo_put(0x02000003);

#ifdef LCG_SAFE
fifo_put(0x04c00000);
fifo_put(0);
fifo_put(lcg_xsize);
fifo_put(lcg_fb_size - (dest - LCG_FB_ADDR));
#endif

fifo_put(0x09c00000);
fifo_put(((ydim & 0xffff) << 16) | xdim);
fifo_put(0);
fifo_put(0);

err = fifo_fill(200);
if (err)
printf("lcg: AG still busy after 200 msec\n");
}

void blkset(long dest, int xdim, int ydim, char color)
{
int err;

#ifdef LCG_SAFE
if ((dest < LCG_FB_ADDR) || (dest > LCG_FB_ADDR + lcg_fb_size)) {
printf("lcg: blkset: invalid destination 0x%lx\n", dest);
return;
}
#endif

fifo_put(0x0c010000 | (color & 0xff));

fifo_put(0x01000000);

fifo_put(0x05800000);
fifo_put(dest);
fifo_put(lcg_xsize);

fifo_put(0x03400000);
fifo_put(0xff);

fifo_put(0x02000003);

#ifdef LCG_SAFE
fifo_put(0x04c00000);
fifo_put(0);
fifo_put(lcg_xsize);
fifo_put(lcg_fb_size - (dest - LCG_FB_ADDR));
#endif

fifo_put(0x09c00000);
fifo_put(((ydim & 0xffff) << 16) | xdim);
fifo_put(0);
fifo_put(0);

err = fifo_fill(200);
if (err)
printf("lcg: AG still busy after 200 msec\n");
}

void renderchar(long source, long dest, int xdim, int ydim, char fg, char bg)
{
int err;
#ifdef LCG_SAFE
if ((dest < LCG_FB_ADDR) || (dest > LCG_FB_ADDR + lcg_fb_size)) {
printf("lcg: blkset: invalid destination 0x%lx\n", dest);
return;
}
#endif

fifo_put(0x0c050000 | (bg & 0xff));
fifo_put(0x0c010000 | (fg & 0xff));

fifo_put(0x01030008);

fifo_put(0x06800000);
fifo_put(source);
//fifo_put(lcg_xsize);
fifo_put(lcg_font.stride);

fifo_put(0x05800000);
fifo_put(dest);
fifo_put(lcg_xsize);

fifo_put(0x03400000);
fifo_put(0xff);

fifo_put(0x02000003);

#ifdef LCG_SAFE
fifo_put(0x04c00000);
fifo_put(0);
fifo_put(lcg_xsize);
fifo_put(lcg_fb_size - (dest - LCG_FB_ADDR));
#endif

fifo_put(0x09c00000);
fifo_put(((ydim & 0xffff) << 16) | (xdim & 0xffff));
fifo_put(0);
fifo_put(0);

err = fifo_fill(200);
if (err)
printf("lcg: AG still busy after 200 msec\n");
}
#endif /* LCG_NO_ACCEL */

int
lcg_match(struct device *parent, struct cfdata *match, void *aux)
{
struct vsbus_softc *sc = device_private(parent);
struct vsbus_attach_args *va = aux;
volatile char * const ch = (char *)va->va_addr;

/*
* Check the VAX board type. LCG can exist on two board types:
* - KA46 (VAXstation 4000/60 or MicroVAX 3100/80)
* - KA48 (VAXstation 4000 VLC or MicroVAX 3100/m{30,40}
*/
if ((vax_boardtype != VAX_BTYP_46) && (vax_boardtype != VAX_BTYP_48))
return 0;

/*
* LCG supposedly only exists on VAXstations, not the MicroVAXen using
* the same board type.
*
* These are "magic values", taken from vax/locore.c
*/
if ((vax_siedata & 0x3) != 2)
return 0;

*ch = 1;
if ((*ch & 1) == 0)
return 0;
*ch = 0;
if ((*ch & 1) != 0)
return 0;

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

void
lcg_attach(struct device *parent, struct device *self, void *aux)
{
struct vsbus_attach_args *va = aux;
struct wsemuldisplaydev_attach_args aa;

printf("\n");
aa.console = lcgaddr != NULL;

lcg_init_common(self, va);

curscr = &lcg_conscreen;

aa.scrdata = &lcg_screenlist;
aa.accessops = &lcg_accessops;

/* enable software cursor */
callout_init(&lcg_cursor_ch, 0);
callout_reset(&lcg_cursor_ch, hz / 2, lcg_crsr_blink, NULL);

config_found(self, &aa, wsemuldisplaydevprint, CFARGS_NONE);
}

static void
lcg_crsr_blink(void *arg)
{
int dot;

if (cur_on && curscr != NULL)
for (dot = 0; dot < lcg_font.fontwidth; dot++)
cursor[dot] = ((cursor[dot] & 0x0f) == cur_fg) ? cur_bg : cur_fg;

callout_reset(&lcg_cursor_ch, hz / 2, lcg_crsr_blink, NULL);
}

void
lcg_cursor(void *id, int on, int row, int col)
{
struct lcg_screen *ss = id;
int dot, attr;

attr = ss->ss_image[row * lcg_cols + col].attr;
if (ss == curscr) {
if (cursor != NULL) {
int ch = QFONT(ss->ss_image[ss->ss_cury * lcg_cols +
ss->ss_curx].data, lcg_font.fontheight - 1);
attr = ss->ss_image[ss->ss_cury * lcg_cols +
ss->ss_curx].attr;

if (attr & LCG_ATTR_REVERSE) {
cur_bg = attr & LCG_FG_MASK;
cur_fg = (attr & LCG_BG_MASK) >> 4;
} else {
cur_fg = attr & LCG_FG_MASK;
cur_bg = (attr & LCG_BG_MASK) >> 4;
}
for (dot = 0; dot < lcg_font.fontwidth; dot++)
cursor[dot] = (ch & (1 << dot)) ?
cur_fg : cur_bg;
}

cursor = &LCG_ADDR(row, col, lcg_font.fontheight - 1, 0);
cur_on = on;
if (attr & LCG_ATTR_REVERSE) {
cur_bg = attr & LCG_FG_MASK;
cur_fg = (attr & LCG_BG_MASK) >> 4;
} else {
cur_fg = attr & LCG_FG_MASK;
cur_bg = (attr & LCG_BG_MASK) >> 4;
}
}
ss->ss_curx = col;
ss->ss_cury = row;
if (attr & LCG_ATTR_REVERSE) {
ss->ss_cur_bg = attr & LCG_FG_MASK;
ss->ss_cur_fg = (attr & LCG_BG_MASK) >> 4;
} else {
ss->ss_cur_fg = attr & LCG_FG_MASK;
ss->ss_cur_bg = (attr & LCG_BG_MASK) >> 4;
}
}

int
lcg_mapchar(void *id, int uni, unsigned int *index)
{
if (uni < 256) {
*index = uni;
return (5);
}
*index = ' ';
return (0);
}

static void
lcg_putchar(void *id, int row, int col, u_int c, long attr)
{
struct lcg_screen *ss = id;
int i;
char dot_fg, dot_bg;

c &= 0xff;

ss->ss_image[row * lcg_cols + col].data = c;
ss->ss_image[row * lcg_cols + col].attr = attr;
if (ss != curscr)
return;

dot_fg = attr & LCG_FG_MASK;
dot_bg = (attr & LCG_BG_MASK) >> 4;
if (attr & LCG_ATTR_REVERSE) {
dot_fg = (attr & LCG_BG_MASK) >> 4;
dot_bg = attr & LCG_FG_MASK;
}

#ifndef LCG_NO_ACCEL
renderchar(LCG_FONT_ADDR + (c * lcg_glyph_size),
LCG_FB_ADDR + (row * lcg_onerow) + (col * lcg_font.fontwidth),
lcg_font.fontwidth, lcg_font.fontheight, dot_fg, dot_bg);
#else
for (i = 0; i < lcg_font.fontheight; i++) {
unsigned char ch = QFONT(c,i);
for (int j = 0; j < lcg_font.fontwidth; j++) {
LCG_ADDR(row, col, i, j) = ((ch >> j) & 1) ? dot_fg : dot_bg;
}
}
#endif /* LCG_NO_ACCEL */
if (attr & LCG_ATTR_UNDERLINE) {
char *p = &LCG_ADDR(row, col, lcg_font.fontheight - 1, 0);
for (i = 0; i < lcg_font.fontwidth; i++)
p[i] = ~p[i];
}
}

/*
* copies columns inside a row.
*/
static void
lcg_copycols(void *id, int row, int srccol, int dstcol, int ncols)
{
struct lcg_screen *ss = id;
#ifdef LCG_NO_ACCEL
int i = 0;
#endif

bcopy(&ss->ss_image[row * lcg_cols + srccol], &ss->ss_image[row *
lcg_cols + dstcol], ncols * sizeof(ss->ss_image[0]));
if (ss != curscr)
return;
#ifdef LCG_NO_ACCEL
for (i = 0; i < lcg_font.fontheight; i++)
memcpy(&LCG_ADDR(row, dstcol, i, 0),
&LCG_ADDR(row,srccol, i, 0), ncols * lcg_font.fontwidth);

#else
blkcpy(LCG_FB_ADDR + (row * lcg_onerow) + (srccol * lcg_font.fontwidth),
LCG_FB_ADDR + (row * lcg_onerow) + (dstcol * lcg_font.fontwidth),
(ncols * lcg_font.fontwidth), lcg_font.fontheight);
#endif
}

/*
* Erases a bunch of chars inside one row.
*/
static void
lcg_erasecols(void *id, int row, int startcol, int ncols, long fillattr)
{
struct lcg_screen *ss = id;
int i;

bzero(&ss->ss_image[row * lcg_cols + startcol], ncols * sizeof(ss->ss_image[0]));
for (i = row * lcg_cols + startcol; i < row * lcg_cols + startcol + ncols; ++i)
ss->ss_image[i].attr = fillattr;
if (ss != curscr)
return;
#ifdef LCG_NO_ACCEL
for (i = 0; i < lcg_font.fontheight; i++)
memset(&LCG_ADDR(row, startcol, i, 0), 0, ncols * lcg_font.fontwidth);
#else
blkset(LCG_FB_ADDR + (row * lcg_onerow) + (startcol * lcg_font.fontwidth),
(ncols * lcg_font.fontwidth), lcg_font.fontheight, (fillattr & LCG_BG_MASK) >> 4);
#endif
}

static void
lcg_copyrows(void *id, int srcrow, int dstrow, int nrows)
{
struct lcg_screen *ss = id;

bcopy(&ss->ss_image[srcrow * lcg_cols], &ss->ss_image[dstrow * lcg_cols],
nrows * lcg_cols * sizeof(ss->ss_image[0]));
if (ss != curscr)
return;
#ifdef LCG_NO_ACCEL
memcpy(&lcgaddr[dstrow * lcg_onerow],
&lcgaddr[srcrow * lcg_onerow], nrows * lcg_onerow);
#else
blkcpy(LCG_FB_ADDR + (srcrow * lcg_onerow), LCG_FB_ADDR + (dstrow * lcg_onerow),
(lcg_cols * lcg_font.fontwidth), (nrows * lcg_font.fontheight));
#endif
}

static void
lcg_eraserows(void *id, int startrow, int nrows, long fillattr)
{
struct lcg_screen *ss = id;
int i;

bzero(&ss->ss_image[startrow * lcg_cols], nrows * lcg_cols *
sizeof(ss->ss_image[0]));
for (i = startrow * lcg_cols; i < (startrow + nrows) * lcg_cols; ++i)
ss->ss_image[i].attr = fillattr;
if (ss != curscr)
return;
#ifdef LCG_NO_ACCEL
memset(&lcgaddr[startrow * lcg_onerow], 0, nrows * lcg_onerow);
#else
blkset(LCG_FB_ADDR + (startrow * lcg_onerow), (lcg_cols * lcg_font.fontwidth),
(nrows * lcg_font.fontheight), (fillattr & LCG_BG_MASK) >> 4);
#endif
}

static int
lcg_allocattr(void *id, int fg, int bg, int flags, long *attrp)
{
long myattr;

if (flags & WSATTR_WSCOLORS)
myattr = (fg & LCG_FG_MASK) | ((bg << 4) & LCG_BG_MASK);
else
myattr = WSCOL_WHITE << 4; /* XXXX */
if (flags & WSATTR_REVERSE)
myattr |= LCG_ATTR_REVERSE;
if (flags & WSATTR_UNDERLINE)
myattr |= LCG_ATTR_UNDERLINE;
*attrp = myattr;
return 0;
}

static int
lcg_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
{
struct wsdisplay_fbinfo *fb = (void *)data;
int i;

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

case WSDISPLAYIO_GINFO:
fb->height = lcg_ysize;
fb->width = lcg_xsize;
fb->depth = lcg_depth;
fb->cmsize = 1 << lcg_depth;
break;

case WSDISPLAYIO_LINEBYTES:
*(u_int *)data = lcg_xsize;
break;

case WSDISPLAYIO_GETCMAP:
return lcg_get_cmap((struct wsdisplay_cmap *)data);

case WSDISPLAYIO_PUTCMAP:
return lcg_set_cmap((struct wsdisplay_cmap *)data);

case WSDISPLAYIO_GMODE:
return EPASSTHROUGH;

case WSDISPLAYIO_SMODE:
/* if setting WSDISPLAYIO_MODE_EMUL, restore console cmap, current screen */
if (*(u_int *)data == WSDISPLAYIO_MODE_EMUL) {
/* FIXME: if this is meant to reset palette LUT reload has to be triggered too */
bzero(lutaddr, LCG_LUT_SIZE);
for (i = 0; i < 8; ++i) {
lcg_cmap.r[i] = lcg_default_cmap.r[i];
lcg_cmap.g[i] = lcg_default_cmap.g[i];
lcg_cmap.b[i] = lcg_default_cmap.b[i];
lutaddr[i * 8 + 1] = i;
lutaddr[i * 8 + 2] = 1;
lutaddr[i * 8 + 3] = lcg_cmap.r[i] >> (lcg_depth & 7);
lutaddr[i * 8 + 4] = 1;
lutaddr[i * 8 + 5] = lcg_cmap.g[i] >> (lcg_depth & 7);
lutaddr[i * 8 + 6] = 1;
lutaddr[i * 8 + 7] = lcg_cmap.b[i] >> (lcg_depth & 7);
}
if (savescr != NULL)
lcg_show_screen(NULL, savescr, 0, NULL, NULL);
savescr = NULL;
} else { /* WSDISPLAYIO_MODE_MAPPED */
savescr = curscr;
curscr = NULL;
/* clear screen? */
}

return EPASSTHROUGH;
#if 0
case WSDISPLAYIO_SVIDEO:
if (*(u_int *)data == WSDISPLAYIO_VIDEO_ON) {
curcmd = curc;
} else {
curc = curcmd;
curcmd &= ~(CUR_CMD_FOPA|CUR_CMD_ENPA);
curcmd |= CUR_CMD_FOPB;
}
WRITECUR(CUR_CMD, curcmd);
break;

case WSDISPLAYIO_GVIDEO:
*(u_int *)data = (curcmd & CUR_CMD_FOPB ?
WSDISPLAYIO_VIDEO_OFF : WSDISPLAYIO_VIDEO_ON);
break;

#endif
default:
return EPASSTHROUGH;
}
return 0;
}

static paddr_t
lcg_mmap(void *v, void *vs, off_t offset, int prot)
{
if (offset >= lcg_fb_size || offset < 0)
return -1;
return (LCG_FB_ADDR + offset) >> PGSHIFT;
}

int
lcg_alloc_screen(void *v, const struct wsscreen_descr *type, void **cookiep,
int *curxp, int *curyp, long *defattrp)
{
int i;
struct lcg_screen *ss;

*cookiep = kmem_alloc(sizeof(struct lcg_screen), KM_SLEEP);
bzero(*cookiep, sizeof(struct lcg_screen));
*curxp = *curyp = 0;
*defattrp = (LCG_BG_COLOR << 4) | LCG_FG_COLOR;
ss = *cookiep;
for (i = 0; i < lcg_cols * lcg_rows; ++i)
ss->ss_image[i].attr = (LCG_BG_COLOR << 4) | LCG_FG_COLOR;
return 0;
}

void
lcg_free_screen(void *v, void *cookie)
{
}

int
lcg_show_screen(void *v, void *cookie, int waitok,
void (*cb)(void *, int, int), void *cbarg)
{
struct lcg_screen *ss = cookie;
int row, col, dot_fg, dot_bg, j, attr;
#ifdef LCG_NO_ACCEL
int iter, jter;
unsigned char ch;
#endif

if (ss == curscr)
return (0);
#ifdef LCG_NO_ACCEL
memset(lcgaddr, LCG_BG_COLOR, lcg_xsize * lcg_ysize);
#endif

for (row = 0; row < lcg_rows; row++)
for (col = 0; col < lcg_cols; col++) {
attr = ss->ss_image[row * lcg_cols + col].attr;
if (attr & LCG_ATTR_REVERSE) {
dot_fg = (attr & LCG_BG_MASK) >> 4;
dot_bg = attr & LCG_FG_MASK;
} else {
dot_fg = attr & LCG_FG_MASK;
dot_bg = (attr & LCG_BG_MASK) >> 4;
}
u_char c = ss->ss_image[row * lcg_cols + col].data;

if (c < 32)
c = 32;
#ifndef LCG_NO_ACCEL
renderchar(LCG_FONT_ADDR + (c * lcg_glyph_size),
LCG_FB_ADDR + (row * lcg_onerow) + (col * lcg_font.fontwidth),
lcg_font.fontwidth, lcg_font.fontheight, dot_fg, dot_bg);
#else
for (iter = 0; iter < lcg_font.fontheight; iter++) {
ch = QFONT(c,iter);
for (jter = 0; jter < lcg_font.fontwidth; jter++) {
LCG_ADDR(row, col, iter, jter) = ((ch >> jter) & 1) ? dot_fg : dot_bg;
}
}
#endif
if (attr & LCG_ATTR_UNDERLINE)
for (j = 0; j < lcg_font.fontwidth; j++)
LCG_ADDR(row, col,
lcg_font.fontheight - 1, j) = dot_fg;
}

cursor = &lcgaddr[(ss->ss_cury * lcg_onerow) +
((lcg_font.fontheight - 1) * lcg_xsize) +
(ss->ss_curx * lcg_font.fontwidth)];
cur_fg = ss->ss_cur_fg;
cur_bg = ss->ss_cur_bg;

curscr = ss;
return (0);
}

static int
lcg_get_cmap(struct wsdisplay_cmap *p)
{
u_int index = p->index, count = p->count;
int error;

if (index >= (1 << lcg_depth) || count > (1 << lcg_depth) - index)
return (EINVAL);

error = copyout(&lcg_cmap.r[index], p->red, count);
if (error)
return error;
error = copyout(&lcg_cmap.g[index], p->green, count);
if (error)
return error;
error = copyout(&lcg_cmap.b[index], p->blue, count);
return error;
}

static int
lcg_set_cmap(struct wsdisplay_cmap *p)
{
u_int index = p->index, count = p->count;
int error, s;

if (index >= (1 << lcg_depth) || count > (1 << lcg_depth) - index)
return (EINVAL);

error = copyin(p->red, &lcg_cmap.r[index], count);
if (error)
return error;
error = copyin(p->green, &lcg_cmap.g[index], count);
if (error)
return error;
error = copyin(p->blue, &lcg_cmap.b[index], count);
if (error)
return error;

s = spltty();
/* FIXME: if this is meant to set palette LUT reload has to be triggered too */
while (count-- > 0) {
lutaddr[index * 8 + 0] = 0;
lutaddr[index * 8 + 1] = index;
lutaddr[index * 8 + 2] = 1;
lutaddr[index * 8 + 3] = lcg_cmap.r[index] >> (lcg_depth & 7);
lutaddr[index * 8 + 4] = 1;
lutaddr[index * 8 + 5] = lcg_cmap.g[index] >> (lcg_depth & 7);
lutaddr[index * 8 + 6] = 1;
lutaddr[index * 8 + 7] = lcg_cmap.b[index] >> (lcg_depth & 7);
++index;
}
splx(s);
return (0);
}

cons_decl(lcg);

void
lcgcninit(struct consdev *cndev)
{
int i;
/* Clear screen */
memset(lcgaddr, LCG_BG_COLOR, lcg_xsize * lcg_ysize);

curscr = &lcg_conscreen;
for (i = 0; i < lcg_cols * lcg_rows; ++i)
lcg_conscreen.ss_image[i].attr =
(LCG_BG_COLOR << 4) | LCG_FG_COLOR;
wsdisplay_cnattach(&lcg_stdscreen, &lcg_conscreen, 0, 0,
(LCG_BG_COLOR << 4) | LCG_FG_COLOR);
cn_tab->cn_pri = CN_INTERNAL;

#if NDZKBD > 0
dzkbd_cnattach(0); /* Connect keyboard and screen together */
#endif
}

/*
* Called very early to setup the glass tty as console.
* Because it's called before the VM system is inited, virtual memory
* for the framebuffer can be stolen directly without disturbing anything.
*/
void
lcgcnprobe(struct consdev *cndev)
{
extern const struct cdevsw wsdisplay_cdevsw;

if ((vax_boardtype != VAX_BTYP_46) && (vax_boardtype != VAX_BTYP_48))
return; /* Only for VS 4000/60 and VLC */

if ((vax_siedata & 0x3) != 2)
return; /* VAXstation only */

if (vax_confdata & 0x100)
return; /* Diagnostic console */

lcg_init_common(NULL, NULL);

/* Set up default LUT */

cndev->cn_pri = CN_INTERNAL;
cndev->cn_dev = makedev(cdevsw_lookup_major(&wsdisplay_cdevsw), 0);
}

void
lcg_init_common(struct device *self, struct vsbus_attach_args *va)
{
u_int magic, *lcg_config;
int i;
extern vaddr_t virtual_avail;
long video_conf;
int cookie;
struct wsdisplay_font *wf;

struct lcg_softc *sc = device_private(self);
bus_dma_segment_t seg;
int rseg, err;
void *fifo_mem_vaddr;
#ifndef LCG_NO_ACCEL
u_char line;
u_int ch, temp;
#endif

if (regaddr != NULL)
return;

/* map LCG registers first */
if (self != NULL) {
regaddr = (long*)vax_map_physmem(LCG_REG_ADDR, (LCG_REG_SIZE/VAX_NBPG));
if (regaddr == 0) {
device_printf(self,
"Couldn't allocate register memory.\n");
return;
}
} else {
regaddr = (long*)virtual_avail;
virtual_avail += LCG_REG_SIZE;
ioaccess((vaddr_t)regaddr, LCG_REG_ADDR, (LCG_REG_SIZE/VAX_NBPG));
}

/*
* v = *0x200f0010 & VLC ? 0x07 : 0xf0;
* switch(v) {
* 0x05: 1280x1024
* 0x06: conf & 0x80 ? 1024x768 : 640x480
* 0x07: conf & 0x80 ? 1024x768 ? 1024x864
* 0x20: 1024x864
* 0x40: 1024x768
* 0x60: 1024x864
* 0x80: 1280x1024 4BPN
* 0x90: 1280x1024 8BPN
* 0xb0: 1280x1024 8BPN 2HD
*/
if (self != NULL) {
lcg_config = (u_int *)vax_map_physmem(LCG_CONFIG, 1);
} else {
lcg_config = (u_int *)virtual_avail;
ioaccess((vaddr_t)lcg_config, LCG_CONFIG, 1);
}
magic = *lcg_config & (vax_boardtype == VAX_BTYP_46 ? 0xf0 : 0x07);
if (self != NULL) {
vax_unmap_physmem((vaddr_t)lcg_config, 1);
} else {
iounaccess((vaddr_t)lcg_config, 1);
}
lcg_depth = 8;
switch(magic) {
case 0x80: /* KA46 HR 1280x1024 4BPLN */
lcg_depth = 4;
case 0x05: /* KA48 HR 1280x1024 8BPLN */
case 0x90: /* KA46 HR 1280x1024 8BPLN */
case 0xb0: /* KA46 HR 1280x1024 8BPLN 2HD */
lcg_xsize = 1280;
lcg_ysize = 1024;
break;
case 0x06: /* KA48 1024x768 or 640x480 */
if (vax_confdata & 0x80) {
lcg_xsize = 1024;
lcg_ysize = 768;
} else {
lcg_xsize = 640;
lcg_ysize = 480;
}
break;
case 0x07: /* KA48 1024x768 or 1024x864 */
lcg_xsize = 1024;
lcg_ysize = (vax_confdata & 0x80) ? 768 : 864;
break;
case 0x20: /* KA46 1024x864 */
case 0x60: /* KA46 1024x864 */
lcg_xsize = 1024;
lcg_ysize = 864;
break;
case 0x40: /* KA46 1024x768 */
lcg_xsize = 1024;
lcg_ysize = 768;
break;
default:
panic("LCG model not supported");
}
if (self != NULL)
aprint_normal_dev(self,
"framebuffer size %dx%d, depth %d (magic 0x%x)\n",
lcg_xsize, lcg_ysize, lcg_depth, magic);

wsfont_init();
cookie = wsfont_find(NULL, 12, 22, 0, WSDISPLAY_FONTORDER_R2L,
WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP);
if (cookie == -1)
cookie = wsfont_find(NULL, 8, 0, 0, WSDISPLAY_FONTORDER_R2L, 0,
WSFONT_FIND_BITMAP);
if (cookie == -1)
cookie = wsfont_find(NULL, 0, 0, 0, WSDISPLAY_FONTORDER_R2L,
WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP);
if (cookie == -1 || wsfont_lock(cookie, &wf))
panic("lcg_common_init: can't load console font");
lcg_font = *wf;
lcg_cols = lcg_xsize / lcg_font.fontwidth;
lcg_rows = lcg_ysize / lcg_font.fontheight;
if (self != NULL) {
aprint_normal_dev(self, "using font %s (%dx%d), ",
lcg_font.name,
lcg_font.fontwidth, lcg_font.fontheight);
aprint_normal("console size: %dx%d\n", lcg_cols, lcg_rows);
}
lcg_onerow = lcg_xsize * lcg_font.fontheight;
lcg_fb_size = lcg_xsize * lcg_ysize;
lcg_stdscreen.ncols = lcg_cols;
lcg_stdscreen.nrows = lcg_rows;
lcg_stdscreen.fontwidth = lcg_font.fontwidth;
lcg_stdscreen.fontheight = lcg_font.fontheight;
lcg_glyph_size = lcg_font.stride * lcg_font.fontheight;
snprintf(lcg_stdscreen_name, sizeof(lcg_stdscreen_name), "%dx%d", lcg_cols, lcg_rows);
qf = lcg_font.data;
qf2 = (u_short *)lcg_font.data;

if (self != NULL) {
lcgaddr = (void *)vax_map_physmem(va->va_paddr,
((lcg_fb_size + LCG_FONT_STORAGE_SIZE)/VAX_NBPG));
if (lcgaddr == 0) {
device_printf(self,
"unable to allocate framebuffer memory.\n");
return;
}
#ifndef LCG_NO_ACCEL
fontaddr = lcgaddr + lcg_fb_size;

/* copy font bitmaps */
for (ch = 0; ch < 256; ch++)
for (line = 0; line < lcg_font.fontheight; line++) {
temp = QFONT(ch, line);
if (lcg_font.stride == 1)
fontaddr[(ch * lcg_font.fontheight) + line] = temp;
else {
/* stride == 2 */
fontaddr[(ch * lcg_font.stride * lcg_font.fontheight) + line] = temp & 0xff;
fontaddr[(ch * lcg_font.stride * lcg_font.fontheight) + line + 1] = (temp >> 16) & 0xff;
}
}
#endif

lutaddr = (void *)vax_map_physmem(LCG_LUT_ADDR, (LCG_LUT_SIZE/VAX_NBPG));
if (lutaddr == 0) {
device_printf(self,
"unable to allocate LUT memory.\n");
return;
}
fifoaddr = (long*)vax_map_physmem(LCG_FIFO_WIN_ADDR, (LCG_FIFO_WIN_SIZE/VAX_NBPG));
if (regaddr == 0) {
device_printf(self, "unable to map FIFO window\n");
return;
}

/* allocate contiguous physical memory block for FIFO */
err = bus_dmamem_alloc(va->va_dmat, LCG_FIFO_SIZE,
LCG_FIFO_ALIGN, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT);
if (err) {
device_printf(self,
"unable to allocate FIFO memory block, err = %d\n",
err);
return;
}

err = bus_dmamem_map(va->va_dmat, &seg, rseg, LCG_FIFO_SIZE,
&fifo_mem_vaddr, BUS_DMA_NOWAIT);
if (err) {
device_printf(self,
"unable to map FIFO memory block, err = %d\n",
err);
bus_dmamem_free(va->va_dmat, &seg, rseg);
return;
}

err = bus_dmamap_create(va->va_dmat, LCG_FIFO_SIZE, rseg,
LCG_FIFO_SIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dm);
if (err) {
device_printf(self,
"unable to create DMA map, err = %d\n",
err);
bus_dmamem_unmap(va->va_dmat, fifo_mem_vaddr, LCG_FIFO_SIZE);
bus_dmamem_free(va->va_dmat, &seg, rseg);
return;
}

err = bus_dmamap_load(va->va_dmat, sc->sc_dm, fifo_mem_vaddr,
LCG_FIFO_SIZE, NULL, BUS_DMA_NOWAIT);
if (err) {
device_printf(self,
"unable to load DMA map, err = %d\n",
err);
bus_dmamap_destroy(va->va_dmat, sc->sc_dm);
bus_dmamem_unmap(va->va_dmat, fifo_mem_vaddr, LCG_FIFO_SIZE);
bus_dmamem_free(va->va_dmat, &seg, rseg);
return;
}

/* initialize LCG hardware */
LCG_REG(LCG_REG_GRAPHICS_CONTROL) = 0xd8000000; /* gfx reset, FIFO and AG enable */
// LCG_REG(LCG_REG_WRITE_PROTECT_LOW_HIGH) = (((LCG_FB_ADDR + lcg_fb_size) & 0xffff0000) | (LCG_FB_ADDR >> 16));
LCG_REG(LCG_REG_WRITE_PROTECT_LOW_HIGH) = 0xffff0000;
LCG_REG(LCG_REG_FIFO_BASE) = sc->sc_dm->dm_segs[0].ds_addr;
LCG_REG(LCG_REG_FIFO_BASE2) = sc->sc_dm->dm_segs[0].ds_addr;
LCG_REG(LCG_REG_FIFO_MASKS) = 0xffff;
LCG_REG(LCG_REG_FIFO_SAVE_HEAD_OFFSET) = sc->sc_dm->dm_segs[0].ds_addr;
// LCG_REG(LCG_REG_GRAPHICS_INT_STATUS) = 0;
// LCG_REG(LCG_REG_GRAPHICS_CONTROL) = 0x50000000; /* FIFO and AG enable */
LCG_REG(LCG_REG_GRAPHICS_INT_STATUS) = 0xffffffff;
LCG_REG(LCG_REG_GRAPHICS_INT_SET_ENABLE) = 0;
LCG_REG(LCG_REG_GRAPHICS_INT_CLR_ENABLE) = 0xffffffff;
LCG_REG(LCG_REG_LCG_GO) = 3; /* FIFO and AG go */
// LCG_REG(LCG_REG_BREAKPT_ADDRESS) = 0x2fffffff;

} else {
lcgaddr = (void *)virtual_avail;
virtual_avail += lcg_fb_size + LCG_FONT_STORAGE_SIZE;
ioaccess((vaddr_t)lcgaddr, LCG_FB_ADDR, (lcg_fb_size/VAX_NBPG));

lutaddr = (void *)virtual_avail;
virtual_avail += LCG_LUT_SIZE;
ioaccess((vaddr_t)lutaddr, LCG_LUT_ADDR, (LCG_LUT_SIZE/VAX_NBPG));

fifoaddr = (long*)virtual_avail;
virtual_avail += LCG_FIFO_WIN_SIZE;
ioaccess((vaddr_t)fifoaddr, LCG_FIFO_WIN_ADDR, (LCG_FIFO_WIN_SIZE/VAX_NBPG));
}

bzero(lutaddr, LCG_LUT_SIZE);
for (i = 0; i < 8; ++i) {
lcg_cmap.r[i] = lcg_default_cmap.r[i];
lcg_cmap.g[i] = lcg_default_cmap.g[i];
lcg_cmap.b[i] = lcg_default_cmap.b[i];
lutaddr[i * 8 + 1] = i;
lutaddr[i * 8 + 2] = 1;
lutaddr[i * 8 + 3] = lcg_cmap.r[i] >> (lcg_depth & 7);
lutaddr[i * 8 + 4] = 1;
lutaddr[i * 8 + 5] = lcg_cmap.g[i] >> (lcg_depth & 7);
lutaddr[i * 8 + 6] = 1;
lutaddr[i * 8 + 7] = lcg_cmap.b[i] >> (lcg_depth & 7);
}

/*
* 0xf100165b 4000/60
* 1111 0001 0000 0000 0001 0110 0101 1011
* vvvv vvvv vvvv vvvv vvvv vvvv vvvv vvvv
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
*
* 0xf1001d7b 4000/VLC
* 1111 0001 0000 0000 0001 1101 0111 1011
* vvvv vvvv vvvv vvvv vvvv vvvv vvvv vvvv
* 3322 2222 2222 1111 1111 11
* 1098 7654 3210 9876 5432 1098 7654 3210
*
* 31-30 11 Vertical state
* 29-38 11 Horizontal state
* 27-26 00
* 25 0 console LUT select
* 24 1 control LUT select
* 23 0
* 22 0 cursor active
* 21-16 000000
* 15 0 video subsystem reset
* 14 0
* 13 0 LUT load size 2KB
* 12 1 enable H sync
* 11 0 Full LUT load 1
* 10 1 video clock select
* 9- 8 10 memory refresh rate 01
* 7- 6 01 video refresh rate
* 5 0 load select 1
* 4 1 read cursor output
* 3 1 LUT load enable
* 2 0 cursor enable
* 1 1 video enable
* 0 1 refresh clock enable
*/
/* prepare video_config reg for LUT reload */
video_conf
= (3 << 30) /* vertical state */
| (3 << 28) /* horizontal state */
| (0 << 26) /* unused */
| (0 << 25) /* console LUT select */
| (0 << 24) /* control LUT select */
| (0 << 23) /* unused */
| (0 << 22) /* cursor active */
| (0 << 16) /* current cursor scanline showing */
| (0 << 15) /* video subsystem reset */
| (0 << 14) /* unused */
| (1 << 13) /* LUT load size 2 KB */
| (1 << 12) /* enable horizontal sync */
| (1 << 10) /* video clock select */
| (1 << 6) /* video refresh select */
| (1 << 4) /* read cursor output */
| (1 << 3) /* LUT load enable */
| (0 << 2) /* cursor enable */
| (1 << 1) /* video enable */
| (1 << 0); /* refresh clock enable */
/* FIXME needs updating for all supported models */
if (lcg_xsize == 1280) { /* 4000/60 HR 4PLN */
video_conf |= (0 << 11); /* split LUT load */
video_conf |= (2 << 8); /* memory refresh select */
video_conf |= (0 << 5); /* split shift register load */
} else { /* 4000/VLC LR 8PLN */
video_conf |= (1 << 11); /* Full LUT load */
video_conf |= (1 << 8); /* memory refresh select */
video_conf |= (1 << 5); /* split shift register load */
}

LCG_REG(LCG_REG_VIDEO_CONFIG) = video_conf;
/* vital !!! */
LCG_REG(LCG_REG_LUT_CONSOLE_SEL) = 1;
LCG_REG(LCG_REG_LUT_COLOR_BASE_W) = LCG_LUT_OFFSET;

delay(1000);
LCG_REG(LCG_REG_LUT_CONSOLE_SEL) = 0;

#ifdef LCG_DEBUG
if (self != NULL)
device_printf(self, "video config register set 0x%08lx\n",
video_conf);
#endif
}