cgthree.c revision 1.5
1 /* $NetBSD: cgthree.c,v 1.5 2002/09/06 13:18:43 gehenna Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * color display (cgthree) driver. 41 * 42 * Does not handle interrupts, even though they can occur. 43 * 44 * XXX should defer colormap updates to vertical retrace interrupts 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: cgthree.c,v 1.5 2002/09/06 13:18:43 gehenna Exp $"); 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/buf.h> 53 #include <sys/device.h> 54 #include <sys/ioctl.h> 55 #include <sys/malloc.h> 56 #include <sys/mman.h> 57 #include <sys/tty.h> 58 #include <sys/conf.h> 59 60 #include <machine/bus.h> 61 #include <machine/autoconf.h> 62 63 #include <dev/sun/fbio.h> 64 #include <dev/sun/fbvar.h> 65 66 #include <dev/sun/btreg.h> 67 #include <dev/sun/btvar.h> 68 #include <dev/sun/cgthreereg.h> 69 #include <dev/sun/cgthreevar.h> 70 71 static void cgthreeunblank(struct device *); 72 static void cgthreeloadcmap(struct cgthree_softc *, int, int); 73 static void cgthree_set_video(struct cgthree_softc *, int); 74 static int cgthree_get_video(struct cgthree_softc *); 75 76 extern struct cfdriver cgthree_cd; 77 78 dev_type_open(cgthreeopen); 79 dev_type_ioctl(cgthreeioctl); 80 dev_type_mmap(cgthreemmap); 81 82 const struct cdevsw cgthree_cdevsw = { 83 cgthreeopen, nullclose, noread, nowrite, cgthreeioctl, 84 nostop, notty, nopoll, cgthreemmap, 85 }; 86 87 /* frame buffer generic driver */ 88 static struct fbdriver cgthreefbdriver = { 89 cgthreeunblank, cgthreeopen, nullclose, cgthreeioctl, nopoll, 90 cgthreemmap 91 }; 92 93 /* Video control parameters */ 94 struct cg3_videoctrl { 95 unsigned char sense; /* Monitor sense value */ 96 unsigned char vctrl[12]; 97 } cg3_videoctrl[] = { 98 /* Missing entries: sense 0x10, 0x30, 0x50 */ 99 { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */ 100 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 101 }, 102 { 0x00, /* default? must be last */ 103 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 104 } 105 }; 106 107 108 void 109 cgthreeattach(sc, name, isconsole) 110 struct cgthree_softc *sc; 111 char *name; 112 int isconsole; 113 { 114 int i; 115 struct fbdevice *fb = &sc->sc_fb; 116 volatile struct fbcontrol *fbc = sc->sc_fbc; 117 volatile struct bt_regs *bt = &fbc->fbc_dac; 118 119 fb->fb_driver = &cgthreefbdriver; 120 fb->fb_type.fb_cmsize = 256; 121 fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes; 122 printf(": %s, %d x %d", name, 123 fb->fb_type.fb_width, fb->fb_type.fb_height); 124 125 /* Transfer video magic to board, if it's not running */ 126 if ((fbc->fbc_ctrl & FBC_TIMING) == 0) { 127 int sense = (fbc->fbc_status & FBS_MSENSE); 128 /* Search table for video timings fitting this monitor */ 129 for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]); 130 i++) { 131 int j; 132 if (sense != cg3_videoctrl[i].sense) 133 continue; 134 135 printf(" setting video ctrl"); 136 for (j = 0; j < 12; j++) 137 fbc->fbc_vcontrol[j] = 138 cg3_videoctrl[i].vctrl[j]; 139 fbc->fbc_ctrl |= FBC_TIMING; 140 break; 141 } 142 } 143 144 /* Initialize the default color map. */ 145 bt_initcmap(&sc->sc_cmap, 256); 146 cgthreeloadcmap(sc, 0, 256); 147 148 /* make sure we are not blanked */ 149 cgthree_set_video(sc, 1); 150 BT_INIT(bt, 0); 151 152 if (isconsole) { 153 printf(" (console)\n"); 154 #ifdef RASTERCONSOLE 155 fbrcons_init(fb); 156 #endif 157 } else 158 printf("\n"); 159 160 fb_attach(fb, isconsole); 161 } 162 163 164 int 165 cgthreeopen(dev, flags, mode, p) 166 dev_t dev; 167 int flags, mode; 168 struct proc *p; 169 { 170 int unit = minor(dev); 171 172 if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.cd_devs[unit] == NULL) 173 return (ENXIO); 174 return (0); 175 } 176 177 int 178 cgthreeioctl(dev, cmd, data, flags, p) 179 dev_t dev; 180 u_long cmd; 181 caddr_t data; 182 int flags; 183 struct proc *p; 184 { 185 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 186 struct fbgattr *fba; 187 int error; 188 189 switch (cmd) { 190 191 case FBIOGTYPE: 192 *(struct fbtype *)data = sc->sc_fb.fb_type; 193 break; 194 195 case FBIOGATTR: 196 fba = (struct fbgattr *)data; 197 fba->real_type = sc->sc_fb.fb_type.fb_type; 198 fba->owner = 0; /* XXX ??? */ 199 fba->fbtype = sc->sc_fb.fb_type; 200 fba->sattr.flags = 0; 201 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 202 fba->sattr.dev_specific[0] = -1; 203 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 204 fba->emu_types[1] = -1; 205 break; 206 207 case FBIOGETCMAP: 208 #define p ((struct fbcmap *)data) 209 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 210 211 case FBIOPUTCMAP: 212 /* copy to software map */ 213 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 214 if (error) 215 return (error); 216 /* now blast them into the chip */ 217 /* XXX should use retrace interrupt */ 218 cgthreeloadcmap(sc, p->index, p->count); 219 #undef p 220 break; 221 222 case FBIOGVIDEO: 223 *(int *)data = cgthree_get_video(sc); 224 break; 225 226 case FBIOSVIDEO: 227 cgthree_set_video(sc, *(int *)data); 228 break; 229 230 default: 231 return (ENOTTY); 232 } 233 return (0); 234 } 235 236 /* 237 * Undo the effect of an FBIOSVIDEO that turns the video off. 238 */ 239 static void 240 cgthreeunblank(dev) 241 struct device *dev; 242 { 243 244 cgthree_set_video((struct cgthree_softc *)dev, 1); 245 } 246 247 static void 248 cgthree_set_video(sc, enable) 249 struct cgthree_softc *sc; 250 int enable; 251 { 252 253 if (enable) 254 sc->sc_fbc->fbc_ctrl |= FBC_VENAB; 255 else 256 sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB; 257 } 258 259 static int 260 cgthree_get_video(sc) 261 struct cgthree_softc *sc; 262 { 263 264 return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0); 265 } 266 267 /* 268 * Load a subset of the current (new) colormap into the Brooktree DAC. 269 */ 270 static void 271 cgthreeloadcmap(sc, start, ncolors) 272 struct cgthree_softc *sc; 273 int start, ncolors; 274 { 275 volatile struct bt_regs *bt; 276 u_int *ip; 277 int count; 278 279 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 280 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 281 bt = &sc->sc_fbc->fbc_dac; 282 bt->bt_addr = BT_D4M4(start); 283 while (--count >= 0) 284 bt->bt_cmap = *ip++; 285 } 286 287 /* 288 * Return the address that would map the given device at the given 289 * offset, allowing for the given protection, or return -1 for error. 290 * 291 * The cg3 is mapped starting at 256KB, for pseudo-compatibility with 292 * the cg4 (which had an overlay plane in the first 128K and an enable 293 * plane in the next 128K). X11 uses only 256k+ region but tries to 294 * map the whole thing, so we repeatedly map the first 256K to the 295 * first page of the color screen. If someone tries to use the overlay 296 * and enable regions, they will get a surprise.... 297 * 298 * As well, mapping at an offset of 0x04000000 causes the cg3 to be 299 * mapped in flat mode without the cg4 emulation. 300 */ 301 paddr_t 302 cgthreemmap(dev, off, prot) 303 dev_t dev; 304 off_t off; 305 int prot; 306 { 307 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 308 309 #define START (128*1024 + 128*1024) 310 #define NOOVERLAY (0x04000000) 311 312 if (off & PGOFSET) 313 panic("cgthreemmap"); 314 if (off < 0) 315 return (-1); 316 if ((u_int)off >= NOOVERLAY) 317 off -= NOOVERLAY; 318 else if ((u_int)off >= START) 319 off -= START; 320 else 321 off = 0; 322 323 if (off >= sc->sc_fb.fb_type.fb_size) 324 return (-1); 325 326 return (bus_space_mmap(sc->sc_bustag, 327 sc->sc_paddr, CG3REG_MEM + off, 328 prot, BUS_SPACE_MAP_LINEAR)); 329 } 330
Indexes created Mon Sep 22 21:09:42 GMT 2025