/* $NetBSD: pci_vga.c,v 1.21 2023/05/06 21:34:39 andvar Exp $ */
/*
* Copyright (c) 1999 Leo Weppelman. 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pci_vga.c,v 1.21 2023/05/06 21:34:39 andvar Exp $");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <atari/pci/pci_vga.h>
#include <atari/dev/grf_etreg.h>
#include <atari/include/iomap.h>
#include <atari/dev/font.h>
#include "vga_pci.h"
#if NVGA_PCI > 0
#include <dev/cons.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#endif
static void loadfont(volatile uint8_t *, uint8_t *fb);
/* XXX: Shouldn't these be in font.h???? */
extern font_info font_info_8x8;
extern font_info font_info_8x16;
/* Console colors */
/* attribute controller registers */
static const uint8_t vga_atc[] = {
0x00, /* 00: internal palette 0 */
0x01, /* 01: internal palette 1 */
0x02, /* 02: internal palette 2 */
0x03, /* 03: internal palette 3 */
0x04, /* 04: internal palette 4 */
0x05, /* 05: internal palette 5 */
0x14, /* 06: internal palette 6 */
0x07, /* 07: internal palette 7 */
0x38, /* 08: internal palette 8 */
0x39, /* 09: internal palette 9 */
0x3a, /* 0A: internal palette 10 */
0x3b, /* 0B: internal palette 11 */
0x3c, /* 0C: internal palette 12 */
0x3d, /* 0D: internal palette 13 */
0x3e, /* 0E: internal palette 14 */
0x3f, /* 0F: internal palette 15 */
0x0c, /* 10: attribute mode control */
0x00, /* 11: overscan color */
0x0f, /* 12: color plane enable */
0x08, /* 13: horizontal PEL panning */
0x00 /* 14: color select */
};
/* video DAC palette registers */
/* XXX only set up 16 colors used by internal palette in ATC registers */
static const uint8_t vga_dacpal[] = {
/* R G B */
0x00, 0x00, 0x00, /* BLACK */
0x00, 0x00, 0x2a, /* BLUE */
0x00, 0x2a, 0x00, /* GREEN */
0x00, 0x2a, 0x2a, /* CYAN */
0x2a, 0x00, 0x00, /* RED */
0x2a, 0x00, 0x2a, /* MAGENTA */
0x2a, 0x15, 0x00, /* BROWN */
0x2a, 0x2a, 0x2a, /* LIGHTGREY */
0x15, 0x15, 0x15, /* DARKGREY */
0x15, 0x15, 0x3f, /* LIGHTBLUE */
0x15, 0x3f, 0x15, /* LIGHTGREEN */
0x15, 0x3f, 0x3f, /* LIGHTCYAN */
0x3f, 0x15, 0x15, /* LIGHTRED */
0x3f, 0x15, 0x3f, /* LIGHTMAGENTA */
0x3f, 0x3f, 0x15, /* YELLOW */
0x3f, 0x3f, 0x3f /* WHITE */
};
static bus_space_tag_t vga_iot, vga_memt;
static int tags_valid = 0;
#define VGA_REG_SIZE (8*1024)
#define VGA_FB_SIZE (32*1024)
/*
* Go look for a VGA card on the PCI-bus. This search is a
* stripped down version of the PCI-probe. It only looks on
* bus0 for VGA cards. The first card found is used.
*/
int
check_for_vga(bus_space_tag_t iot, bus_space_tag_t memt)
{
pci_chipset_tag_t pc = NULL; /* XXX */
bus_space_handle_t ioh_regs, memh_fb;
pcitag_t tag;
int device, found, maxndevs, i;
int got_ioh, got_memh, rv;
uint32_t id, class;
volatile uint8_t *regs;
uint8_t *fb;
const char *nbd = "NetBSD/Atari";
found = 0;
tag = 0;
id = 0;
rv = 0;
got_ioh = 0;
got_memh = 0;
maxndevs = pci_bus_maxdevs(pc, 0);
/*
* Map 8Kb of registers and 32Kb frame buffer.
* XXX: The way the registers are mapped here is plain wrong.
* We should try to pin-point the region down to 3[bcd]0 (see
* .../dev/ic/vga.c).
*/
if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs))
return 0;
got_ioh = 1;
if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb))
goto bad;
got_memh = 1;
regs = bus_space_vaddr(iot, ioh_regs);
fb = bus_space_vaddr(memt, memh_fb);
for (device = 0; !found && (device < maxndevs); device++) {
tag = pci_make_tag(pc, 0, device, 0);
id = pci_conf_read(pc, tag, PCI_ID_REG);
if (id == 0 || id == 0xffffffff)
continue;
/*
* Check if we have some display device here...
*/
class = pci_conf_read(pc, tag, PCI_CLASS_REG);
i = 0;
if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC &&
PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA)
i = 1;
if (PCI_CLASS(class) == PCI_CLASS_DISPLAY &&
PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA)
i = 1;
if (i == 0)
continue;
#if _MILANHW_
/* Don't need to be more specific */
milan_vga_init(pc, tag, id, regs, fb);
found = 1;
#else
switch (id = PCI_PRODUCT(id)) {
/*
* XXX Make the inclusion of the cases dependent
* on config options!
*/
case PCI_PRODUCT_TSENG_ET6000:
case PCI_PRODUCT_TSENG_ET4000_W32P_A:
case PCI_PRODUCT_TSENG_ET4000_W32P_B:
case PCI_PRODUCT_TSENG_ET4000_W32P_C:
case PCI_PRODUCT_TSENG_ET4000_W32P_D:
tseng_init(pc, tag, id, regs, fb);
found = 1;
break;
case PCI_PRODUCT_ATI_RAGE_PRO_PCI_P:
ati_vga_init(pc, tag, id, regs, fb);
found = 1;
break;
default:
break;
}
#endif /* _MILANHW_ */
}
if (!found)
goto bad;
/*
* Assume the device is in CGA mode. Wscons expects this too...
*/
bus_space_unmap(memt, memh_fb, VGA_FB_SIZE);
if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) {
got_memh = 0;
goto bad;
}
fb = bus_space_vaddr(memt, memh_fb);
/*
* Generic parts of the initialization...
*/
/* set ATC registers */
for (i = 0; i < 21; i++)
WAttr(regs, i, vga_atc[i]);
/* set DAC palette */
for (i = 0; i < 16; i++) {
vgaw(regs, VDAC_ADDRESS_W, vga_atc[i]);
vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 0]);
vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 1]);
vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 2]);
}
loadfont(regs, fb);
#if NVGA_PCI > 0
/* use explicit WSDISPLAY_FONTENC_IBM font that MI vga(4) assumes */
vga_no_builtinfont = 1;
#endif
/*
* Clear the screen and print a message. The latter
* is of diagnostic/debug use only.
*/
for (i = 50 * 80; i >= 0; i -= 2) {
fb[i] = 0x20; fb[i+1] = 0x07;
}
for (i = 56; *nbd; i += 2)
fb[i] = *nbd++;
rv = 1;
vga_iot = iot;
vga_memt = memt;
rv = tags_valid = 1;
bad:
if (got_memh)
bus_space_unmap(memt, memh_fb, VGA_FB_SIZE);
if (got_ioh)
bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE);
return rv;
}
#if NVGA_PCI > 0
void vgacnprobe(struct consdev *);
void vgacninit(struct consdev *);
void
vgacnprobe(struct consdev *cp)
{
if (tags_valid)
cp->cn_pri = CN_NORMAL;
}
void
vgacninit(struct consdev *cp)
{
if (tags_valid) {
/* XXX: Are those arguments correct? Leo */
vga_cnattach(vga_iot, vga_memt, 8, 0);
}
}
#endif /* NVGA_PCI */
/*
* Generic VGA. Load the configured kernel font into the videomemory and
* place the card into textmode.
*/
static void
loadfont(volatile uint8_t *ba, uint8_t *fb)
/* ba: Register area KVA */
/* fb: Frame buffer KVA */
{
font_info *fd;
uint8_t *c, *f, tmp;
uint16_t z, y;
#if defined(KFONT_8X8)
fd = &font_info_8x8;
#else
fd = &font_info_8x16;
#endif
WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a);
WSeq(ba, SEQ_ID_MAP_MASK, 0x04);
WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06);
WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02);
WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00);
WGfx(ba, GCT_ID_MISC, 0x0c);
/*
* load text font into beginning of display memory. Each
* character cell is 32 bytes long (enough for 4 planes)
*/
for (z = 0, c = fb; z < 256 * 32; z++)
*c++ = 0;
c = (uint8_t *)(fb) + (32 * fd->font_lo);
f = fd->font_p;
z = fd->font_lo;
for (; z <= fd->font_hi; z++, c += (32 - fd->height))
for (y = 0; y < fd->height; y++) {
*c++ = *f++;
}
/*
* Odd/Even addressing
*/
WSeq(ba, SEQ_ID_MAP_MASK, 0x03);
WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03);
WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00);
WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10);
WGfx(ba, GCT_ID_MISC, 0x0e);
/*
* Font height + underline location
*/
tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0;
WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1));
tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0;
WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1));
/*
* Cursor setup
*/
WCrt(ba, CRT_ID_CURSOR_START , 0x00);
WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1);
WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00);
WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00);
/*
* Enter text mode
*/
WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3);
WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a);
}
