1 /* $NetBSD: pci_vga.c,v 1.14 2009/10/20 19:10:11 snj 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 1.14 2009/10/20 19:10:11 snj 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 u_char *, u_char *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 u_char conscolors[3][3] = { /* background, foreground, hilite */ 59 {0x0, 0x0, 0x0}, {0x30, 0x30, 0x30}, { 0x3f, 0x3f, 0x3f} 60 }; 61 62 static bus_space_tag_t vga_iot, vga_memt; 63 static int tags_valid = 0; 64 65 #define VGA_REG_SIZE (8*1024) 66 #define VGA_FB_SIZE (32*1024) 67 68 /* 69 * Go look for a VGA card on the PCI-bus. This search is a 70 * stripped down version of the PCI-probe. It only looks on 71 * bus0 for VGA cards. The first card found is used. 72 */ 73 int 74 check_for_vga(bus_space_tag_t iot, bus_space_tag_t memt) 75 { 76 pci_chipset_tag_t pc = NULL; /* XXX */ 77 bus_space_handle_t ioh_regs, memh_fb; 78 pcitag_t tag; 79 int device, found, id, maxndevs, i, j; 80 int class, got_ioh, got_memh, rv; 81 volatile u_char *regs; 82 u_char *fb; 83 const char *nbd = "NetBSD/Atari"; 84 85 found = 0; 86 tag = 0; 87 id = 0; 88 rv = 0; 89 got_ioh = 0; 90 got_memh = 0; 91 maxndevs = pci_bus_maxdevs(pc, 0); 92 93 /* 94 * Map 8Kb of registers and 32Kb frame buffer. 95 * XXX: The way the registers are mapped here is plain wrong. 96 * We should try to pin-point the region down to 3[bcd]0 (see 97 * .../dev/ic/vga.c). 98 */ 99 if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs)) 100 return 0; 101 got_ioh = 1; 102 103 if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb)) 104 goto bad; 105 got_memh = 1; 106 regs = bus_space_vaddr(iot, ioh_regs); 107 fb = bus_space_vaddr(memt, memh_fb); 108 109 for (device = 0; !found && (device < maxndevs); device++) { 110 111 tag = pci_make_tag(pc, 0, device, 0); 112 id = pci_conf_read(pc, tag, PCI_ID_REG); 113 if (id == 0 || id == 0xffffffff) 114 continue; 115 116 /* 117 * Check if we have some display device here... 118 */ 119 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 120 i = 0; 121 if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC && 122 PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA) 123 i = 1; 124 if (PCI_CLASS(class) == PCI_CLASS_DISPLAY && 125 PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) 126 i = 1; 127 if (i == 0) 128 continue; 129 130 #if _MILANHW_ 131 /* Don't need to be more specific */ 132 milan_vga_init(pc, tag, id, regs, fb); 133 found = 1; 134 #else 135 switch (id = PCI_PRODUCT(id)) { 136 137 /* 138 * XXX Make the inclusion of the cases dependend 139 * on config options! 140 */ 141 case PCI_PRODUCT_TSENG_ET6000: 142 case PCI_PRODUCT_TSENG_ET4000_W32P_A: 143 case PCI_PRODUCT_TSENG_ET4000_W32P_B: 144 case PCI_PRODUCT_TSENG_ET4000_W32P_C: 145 case PCI_PRODUCT_TSENG_ET4000_W32P_D: 146 tseng_init(pc, tag, id, regs, fb); 147 found = 1; 148 break; 149 case PCI_PRODUCT_ATI_RAGE_PRO_PCI_P: 150 ati_vga_init(pc, tag, id, regs, fb); 151 found = 1; 152 break; 153 default: 154 break; 155 } 156 #endif /* _MILANHW_ */ 157 } 158 if (!found) 159 goto bad; 160 161 /* 162 * Assume the device is in CGA mode. Wscons expects this too... 163 */ 164 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 165 if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) { 166 got_memh = 0; 167 goto bad; 168 } 169 fb = bus_space_vaddr(memt, memh_fb); 170 171 /* 172 * Generic parts of the initialization... 173 */ 174 175 /* B&W colors */ 176 vgaw(regs, VDAC_ADDRESS_W, 0); 177 for (i = 0; i < 256; i++) { 178 j = (i & 1) ? ((i > 7) ? 2 : 1) : 0; 179 vgaw(regs, VDAC_DATA, conscolors[j][0]); 180 vgaw(regs, VDAC_DATA, conscolors[j][1]); 181 vgaw(regs, VDAC_DATA, conscolors[j][2]); 182 } 183 184 loadfont(regs, fb); 185 186 /* 187 * Clear the screen and print a message. The latter 188 * is of diagnostic/debug use only. 189 */ 190 for (i = 50 * 80; i >= 0; i -= 2) { 191 fb[i] = 0x20; fb[i+1] = 0x07; 192 } 193 for (i = 56; *nbd; i += 2) 194 fb[i] = *nbd++; 195 196 rv = 1; 197 vga_iot = iot; 198 vga_memt = memt; 199 rv = tags_valid = 1; 200 201 bad: 202 if (got_memh) 203 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 204 if (got_ioh) 205 bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE); 206 return (rv); 207 } 208 209 #if NVGA_PCI > 0 210 void vgacnprobe(struct consdev *); 211 void vgacninit(struct consdev *); 212 213 void 214 vgacnprobe(struct consdev *cp) 215 { 216 if (tags_valid) 217 cp->cn_pri = CN_NORMAL; 218 } 219 220 void 221 vgacninit(struct consdev *cp) 222 { 223 if (tags_valid) { 224 /* XXX: Are those arguments correct? Leo */ 225 vga_cnattach(vga_iot, vga_memt, 8, 0); 226 } 227 } 228 #endif /* NVGA_PCI */ 229 230 /* 231 * Generic VGA. Load the configured kernel font into the videomemory and 232 * place the card into textmode. 233 */ 234 static void 235 loadfont(volatile u_char *ba, u_char *fb) 236 /* ba: Register area KVA */ 237 /* fb: Frame buffer KVA */ 238 { 239 font_info *fd; 240 u_char *c, *f, tmp; 241 u_short z, y; 242 243 #if defined(KFONT_8X8) 244 fd = &font_info_8x8; 245 #else 246 fd = &font_info_8x16; 247 #endif 248 249 WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a); 250 WSeq(ba, SEQ_ID_MAP_MASK, 0x04); 251 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06); 252 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02); 253 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00); 254 WGfx(ba, GCT_ID_MISC, 0x0c); 255 256 /* 257 * load text font into beginning of display memory. Each 258 * character cell is 32 bytes long (enough for 4 planes) 259 */ 260 for (z = 0, c = fb; z < 256 * 32; z++) 261 *c++ = 0; 262 263 c = (unsigned char *) (fb) + (32 * fd->font_lo); 264 f = fd->font_p; 265 z = fd->font_lo; 266 for (; z <= fd->font_hi; z++, c += (32 - fd->height)) 267 for (y = 0; y < fd->height; y++) { 268 *c++ = *f++; 269 } 270 271 /* 272 * Odd/Even addressing 273 */ 274 WSeq(ba, SEQ_ID_MAP_MASK, 0x03); 275 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03); 276 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00); 277 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10); 278 WGfx(ba, GCT_ID_MISC, 0x0e); 279 280 /* 281 * Font height + underline location 282 */ 283 tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0; 284 WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1)); 285 tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0; 286 WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1)); 287 288 /* 289 * Cursor setup 290 */ 291 WCrt(ba, CRT_ID_CURSOR_START , 0x00); 292 WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1); 293 WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00); 294 WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00); 295 296 /* 297 * Enter text mode 298 */ 299 WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3); 300 WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a); 301 } 302