/* $NetBSD: pci_vga.c,v 1.17.2.1 2022/09/11 18:23:30 martin 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 __KERNEL_RCSID(0, "$NetBSD: pci_vga.c,v 1.17.2.1 2022/09/11 18:23:30 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include "vga_pci.h" #if NVGA_PCI > 0 #include #include #include #include #include #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 regsters */ 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 dependend * 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); }