1 /* $NetBSD: pci_vga.c,v 1.17 2019/05/04 09:03:08 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Leo Weppelman. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: pci_vga.c,v 1.17 2019/05/04 09:03:08 tsutsui Exp $"); 29 30 #include <sys/param.h> 31 #include <sys/queue.h> 32 #include <sys/systm.h> 33 #include <dev/pci/pcireg.h> 34 #include <dev/pci/pcivar.h> 35 #include <dev/pci/pcidevs.h> 36 #include <atari/pci/pci_vga.h> 37 #include <atari/dev/grf_etreg.h> 38 #include <atari/include/iomap.h> 39 40 #include <atari/dev/font.h> 41 42 #include "vga_pci.h" 43 #if NVGA_PCI > 0 44 #include <dev/cons.h> 45 #include <dev/ic/mc6845reg.h> 46 #include <dev/ic/pcdisplayvar.h> 47 #include <dev/ic/vgareg.h> 48 #include <dev/ic/vgavar.h> 49 #endif 50 51 static void loadfont(volatile uint8_t *, uint8_t *fb); 52 53 /* XXX: Shouldn't these be in font.h???? */ 54 extern font_info font_info_8x8; 55 extern font_info font_info_8x16; 56 57 /* Console colors */ 58 static const uint8_t conscolors[3][3] = { 59 /* background, foreground, hilite */ 60 { 0x00, 0x00, 0x00 }, 61 { 0x30, 0x30, 0x30 }, 62 { 0x3f, 0x3f, 0x3f } 63 }; 64 65 static bus_space_tag_t vga_iot, vga_memt; 66 static int tags_valid = 0; 67 68 #define VGA_REG_SIZE (8*1024) 69 #define VGA_FB_SIZE (32*1024) 70 71 /* 72 * Go look for a VGA card on the PCI-bus. This search is a 73 * stripped down version of the PCI-probe. It only looks on 74 * bus0 for VGA cards. The first card found is used. 75 */ 76 int 77 check_for_vga(bus_space_tag_t iot, bus_space_tag_t memt) 78 { 79 pci_chipset_tag_t pc = NULL; /* XXX */ 80 bus_space_handle_t ioh_regs, memh_fb; 81 pcitag_t tag; 82 int device, found, maxndevs, i, j; 83 int got_ioh, got_memh, rv; 84 uint32_t id, class; 85 volatile uint8_t *regs; 86 uint8_t *fb; 87 const char *nbd = "NetBSD/Atari"; 88 89 found = 0; 90 tag = 0; 91 id = 0; 92 rv = 0; 93 got_ioh = 0; 94 got_memh = 0; 95 maxndevs = pci_bus_maxdevs(pc, 0); 96 97 /* 98 * Map 8Kb of registers and 32Kb frame buffer. 99 * XXX: The way the registers are mapped here is plain wrong. 100 * We should try to pin-point the region down to 3[bcd]0 (see 101 * .../dev/ic/vga.c). 102 */ 103 if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs)) 104 return 0; 105 got_ioh = 1; 106 107 if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb)) 108 goto bad; 109 got_memh = 1; 110 regs = bus_space_vaddr(iot, ioh_regs); 111 fb = bus_space_vaddr(memt, memh_fb); 112 113 for (device = 0; !found && (device < maxndevs); device++) { 114 115 tag = pci_make_tag(pc, 0, device, 0); 116 id = pci_conf_read(pc, tag, PCI_ID_REG); 117 if (id == 0 || id == 0xffffffff) 118 continue; 119 120 /* 121 * Check if we have some display device here... 122 */ 123 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 124 i = 0; 125 if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC && 126 PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA) 127 i = 1; 128 if (PCI_CLASS(class) == PCI_CLASS_DISPLAY && 129 PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) 130 i = 1; 131 if (i == 0) 132 continue; 133 134 #if _MILANHW_ 135 /* Don't need to be more specific */ 136 milan_vga_init(pc, tag, id, regs, fb); 137 found = 1; 138 #else 139 switch (id = PCI_PRODUCT(id)) { 140 141 /* 142 * XXX Make the inclusion of the cases dependend 143 * on config options! 144 */ 145 case PCI_PRODUCT_TSENG_ET6000: 146 case PCI_PRODUCT_TSENG_ET4000_W32P_A: 147 case PCI_PRODUCT_TSENG_ET4000_W32P_B: 148 case PCI_PRODUCT_TSENG_ET4000_W32P_C: 149 case PCI_PRODUCT_TSENG_ET4000_W32P_D: 150 tseng_init(pc, tag, id, regs, fb); 151 found = 1; 152 break; 153 case PCI_PRODUCT_ATI_RAGE_PRO_PCI_P: 154 ati_vga_init(pc, tag, id, regs, fb); 155 found = 1; 156 break; 157 default: 158 break; 159 } 160 #endif /* _MILANHW_ */ 161 } 162 if (!found) 163 goto bad; 164 165 /* 166 * Assume the device is in CGA mode. Wscons expects this too... 167 */ 168 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 169 if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) { 170 got_memh = 0; 171 goto bad; 172 } 173 fb = bus_space_vaddr(memt, memh_fb); 174 175 /* 176 * Generic parts of the initialization... 177 */ 178 179 /* B&W colors */ 180 vgaw(regs, VDAC_ADDRESS_W, 0); 181 for (i = 0; i < 256; i++) { 182 j = (i & 1) ? ((i > 7) ? 2 : 1) : 0; 183 vgaw(regs, VDAC_DATA, conscolors[j][0]); 184 vgaw(regs, VDAC_DATA, conscolors[j][1]); 185 vgaw(regs, VDAC_DATA, conscolors[j][2]); 186 } 187 188 loadfont(regs, fb); 189 190 /* 191 * Clear the screen and print a message. The latter 192 * is of diagnostic/debug use only. 193 */ 194 for (i = 50 * 80; i >= 0; i -= 2) { 195 fb[i] = 0x20; fb[i+1] = 0x07; 196 } 197 for (i = 56; *nbd; i += 2) 198 fb[i] = *nbd++; 199 200 rv = 1; 201 vga_iot = iot; 202 vga_memt = memt; 203 rv = tags_valid = 1; 204 205 bad: 206 if (got_memh) 207 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 208 if (got_ioh) 209 bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE); 210 return rv; 211 } 212 213 #if NVGA_PCI > 0 214 void vgacnprobe(struct consdev *); 215 void vgacninit(struct consdev *); 216 217 void 218 vgacnprobe(struct consdev *cp) 219 { 220 221 if (tags_valid) 222 cp->cn_pri = CN_NORMAL; 223 } 224 225 void 226 vgacninit(struct consdev *cp) 227 { 228 229 if (tags_valid) { 230 /* XXX: Are those arguments correct? Leo */ 231 vga_cnattach(vga_iot, vga_memt, 8, 0); 232 } 233 } 234 #endif /* NVGA_PCI */ 235 236 /* 237 * Generic VGA. Load the configured kernel font into the videomemory and 238 * place the card into textmode. 239 */ 240 static void 241 loadfont(volatile uint8_t *ba, uint8_t *fb) 242 /* ba: Register area KVA */ 243 /* fb: Frame buffer KVA */ 244 { 245 font_info *fd; 246 uint8_t *c, *f, tmp; 247 uint16_t z, y; 248 249 #if defined(KFONT_8X8) 250 fd = &font_info_8x8; 251 #else 252 fd = &font_info_8x16; 253 #endif 254 255 WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a); 256 WSeq(ba, SEQ_ID_MAP_MASK, 0x04); 257 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06); 258 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02); 259 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00); 260 WGfx(ba, GCT_ID_MISC, 0x0c); 261 262 /* 263 * load text font into beginning of display memory. Each 264 * character cell is 32 bytes long (enough for 4 planes) 265 */ 266 for (z = 0, c = fb; z < 256 * 32; z++) 267 *c++ = 0; 268 269 c = (uint8_t *)(fb) + (32 * fd->font_lo); 270 f = fd->font_p; 271 z = fd->font_lo; 272 for (; z <= fd->font_hi; z++, c += (32 - fd->height)) 273 for (y = 0; y < fd->height; y++) { 274 *c++ = *f++; 275 } 276 277 /* 278 * Odd/Even addressing 279 */ 280 WSeq(ba, SEQ_ID_MAP_MASK, 0x03); 281 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03); 282 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00); 283 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10); 284 WGfx(ba, GCT_ID_MISC, 0x0e); 285 286 /* 287 * Font height + underline location 288 */ 289 tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0; 290 WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1)); 291 tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0; 292 WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1)); 293 294 /* 295 * Cursor setup 296 */ 297 WCrt(ba, CRT_ID_CURSOR_START , 0x00); 298 WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1); 299 WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00); 300 WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00); 301 302 /* 303 * Enter text mode 304 */ 305 WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3); 306 WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a); 307 } 308