/* $NetBSD: ofw_rascons.c,v 1.18 2021/08/17 22:00:30 andvar 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
[email protected]
* 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>
__KERNEL_RCSID(0, "$NetBSD: ofw_rascons.c,v 1.18 2021/08/17 22:00:30 andvar Exp $");
#include "wsdisplay.h"
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <dev/ofw/openfirm.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>
#include <dev/wsfont/wsfont.h>
#include <powerpc/oea/bat.h>
#include <powerpc/oea/cpufeat.h>
#include <powerpc/oea/ofw_rasconsvar.h>
/* we need a wsdisplay to do anything halfway useful */
#if NWSDISPLAY > 0
static int copy_rom_font(void);
static struct wsdisplay_font openfirm6x11;
static vaddr_t fbaddr;
static int romfont_loaded = 0;
static int needs_finalize = 0;
#define FONTBUFSIZE (2048) /* enough for 96 6x11 bitmap characters */
static uint8_t fontbuf[FONTBUFSIZE];
struct vcons_screen rascons_console_screen;
struct wsscreen_descr rascons_stdscreen = {
"std",
0, 0, /* will be filled in -- XXX shouldn't, it's global */
0,
0, 0,
WSSCREEN_REVERSE
};
int
rascons_cnattach(void)
{
struct rasops_info *ri = &rascons_console_screen.scr_ri;
long defattr;
int crow = 0;
/* get current cursor position */
OF_interpret("line#", 0, 1, &crow);
if (crow < 0)
crow = 0;
/* move (rom monitor) cursor to the lowest line - 1 */
/* XXXX - Why? */
#if 0
OF_interpret("#lines 2 - to line#", 0, 0);
#endif
wsfont_init();
if (copy_rom_font() == 0) {
#if !defined(OFWOEA_WSCONS_NO_ROM_FONT)
romfont_loaded = 1;
#endif /* !OFWOEA_WSCONS_NO_ROM_FONT */
}
/* set up rasops */
rascons_init_rasops(console_node, ri);
/*
* no need to clear the screen here when we're mimicing firmware
* output anyway
*/
#if 0
if (ri->ri_width >= 1024 && ri->ri_height >= 768) {
int i, screenbytes = ri->ri_stride * ri->ri_height;
for (i = 0; i < screenbytes; i += sizeof(u_int32_t))
*(u_int32_t *)(fbaddr + i) = 0xffffffff;
crow = 0;
}
#endif
rascons_stdscreen.nrows = ri->ri_rows;
rascons_stdscreen.ncols = ri->ri_cols;
rascons_stdscreen.textops = &ri->ri_ops;
rascons_stdscreen.capabilities = ri->ri_caps;
/*
* XXX
* On some G5 models ( so far, 970FX but not 970MP ) we can't seem to
* access video memory in real mode, but a lot of code relies on rasops
* data structures being set up early so we can't just push the whole
* thing further down. Instead set things up but don't actually attach
* the console until later.
* This needs a better trigger but for now I can't reliably tell which
* exact models / CPUs / other hardware actually need it.
*/
if ((oeacpufeat & OEACPU_64_BRIDGE) != 0) {
needs_finalize = 1;
} else {
ri->ri_ops.allocattr(ri, 0, 0, 0, &defattr);
wsdisplay_preattach(&rascons_stdscreen, ri, 0, uimax(0,
uimin(crow, ri->ri_rows - 1)), defattr);
}
#if notyet
rascons_init_cmap(NULL);
#endif
return 0;
}
void
rascons_add_rom_font(void)
{
wsfont_init();
if (romfont_loaded) {
wsfont_add(&openfirm6x11, 0);
}
}
void
rascons_finalize(void)
{
struct rasops_info *ri = &rascons_console_screen.scr_ri;
long defattr;
int crow = 0;
if (needs_finalize == 0) return;
/* get current cursor position */
if (romfont_loaded) {
OF_interpret("line#", 0, 1, &crow);
if (crow < 0)
crow = 0;
}
ri->ri_ops.allocattr(ri, 0, 0, 0, &defattr);
wsdisplay_preattach(&rascons_stdscreen, ri, 0, uimax(0,
uimin(crow, ri->ri_rows - 1)), defattr);
}
static int
copy_rom_font(void)
{
u_char *romfont;
int char_width, char_height, stride;
int chosen, mmu, m, e, size;
/*
* Get ROM FONT address.
*
* For some machines like ``PowerMac11,2'', Open Firmware does not
* initialize console-related variables when auto-boot? is true;
* -1 is returned instead of correct value. Fall back to wsfont
* embedded in kernel in this case.
*/
OF_interpret("font-adr", 0, 1, &romfont);
if (romfont == NULL || romfont == (u_char *)-1)
return -1;
chosen = OF_finddevice("/chosen");
OF_getprop(chosen, "mmu", &mmu, 4);
/*
* Convert to physical address. We cannot access to Open Firmware's
* virtual address space.
*/
OF_call_method("translate", mmu, 1, 3, romfont, &romfont, &m, &e);
/* Get character size */
OF_interpret("char-width", 0, 1, &char_width);
OF_interpret("char-height", 0, 1, &char_height);
stride = (char_width + 7) >> 3;
size = stride * char_height * 96;
if (size > FONTBUFSIZE) return -1;
memcpy(fontbuf, romfont, size);
openfirm6x11.name = "Open Firmware";
openfirm6x11.firstchar = 32;
openfirm6x11.numchars = 96;
openfirm6x11.encoding = WSDISPLAY_FONTENC_ISO;
openfirm6x11.fontwidth = char_width;
openfirm6x11.fontheight = char_height;
openfirm6x11.stride = stride;
openfirm6x11.bitorder = WSDISPLAY_FONTORDER_L2R;
openfirm6x11.byteorder = WSDISPLAY_FONTORDER_L2R;
openfirm6x11.data = fontbuf;
return 0;
}
int
rascons_init_rasops(int node, struct rasops_info *ri)
{
int32_t width, height, linebytes, depth;
/* XXX /chaos/control doesn't have "width", "height", ... */
width = height = -1;
if (OF_getprop(node, "width", &width, 4) != 4)
OF_interpret("screen-width", 0, 1, &width);
if (OF_getprop(node, "height", &height, 4) != 4)
OF_interpret("screen-height", 0, 1, &height);
if (OF_getprop(node, "linebytes", &linebytes, 4) != 4)
linebytes = width; /* XXX */
if (OF_getprop(node, "depth", &depth, 4) != 4)
depth = 8; /* XXX */
if (OF_getprop(node, "address", &fbaddr, 4) != 4)
OF_interpret("frame-buffer-adr", 0, 1, &fbaddr);
if (width == -1 || height == -1 || fbaddr == 0 || fbaddr == -1)
return false;
/* initialize rasops */
ri->ri_width = width;
ri->ri_height = height;
ri->ri_depth = depth;
ri->ri_stride = linebytes;
ri->ri_bits = (char *)fbaddr;
ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_NO_AUTO;
/* mimic firmware output if we can find the ROM font */
if (romfont_loaded) {
int cols = 0, rows = 0;
/*
* XXX this assumes we're the console which may or may not
* be the case
*/
OF_interpret("#lines", 0, 1, &rows);
OF_interpret("#columns", 0, 1, &cols);
ri->ri_font = &openfirm6x11;
ri->ri_wsfcookie = -1; /* not using wsfont */
rasops_init(ri, rows, cols);
#ifdef RASCONS_DEBUG
char buffer[128];
snprintf(buffer, 128, "bits %08x c %d w %d -> %d %d\n",
(uint32_t)ri->ri_bits, cols, width, ri->ri_xorigin, ri->ri_yorigin);
OF_write(console_instance, buffer, strlen(buffer));
#endif
} else {
/* use as much of the screen as the font permits */
rasops_init(ri, height/8, width/8);
ri->ri_caps = WSSCREEN_WSCOLORS;
rasops_reconfig(ri, height / ri->ri_font->fontheight,
width / ri->ri_font->fontwidth);
}
#ifdef macppc
if (depth == 8 && ofw_quiesce) {
/*
* Open Firmware will be quiesced. This is last chance to
* set color palette via ``color!'' method.
*/
for (int i = 0; i < 256; i++) {
OF_call_method_1("color!", console_instance, 4,
rasops_cmap[3 * i], rasops_cmap[3 * i + 1],
rasops_cmap[3 * i + 2], i);
}
}
#endif
return true;
}
#else /* NWSDISPLAY > 0 */
int
rascons_cnattach(void)
{
return -1;
}
#endif
