cgthree.c revision 1.4
1 /* $NetBSD: cgthree.c,v 1.4 2001/11/13 06:54:32 lukem 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 1.4 2001/11/13 06:54:32 lukem 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 #include <machine/conf.h> 72 73 static void cgthreeunblank(struct device *); 74 static void cgthreeloadcmap(struct cgthree_softc *, int, int); 75 static void cgthree_set_video(struct cgthree_softc *, int); 76 static int cgthree_get_video(struct cgthree_softc *); 77 78 /* cdevsw prototypes */ 79 cdev_decl(cgthree); 80 81 extern struct cfdriver cgthree_cd; 82 83 /* frame buffer generic driver */ 84 static struct fbdriver cgthreefbdriver = { 85 cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreepoll, 86 cgthreemmap 87 }; 88 89 /* Video control parameters */ 90 struct cg3_videoctrl { 91 unsigned char sense; /* Monitor sense value */ 92 unsigned char vctrl[12]; 93 } cg3_videoctrl[] = { 94 /* Missing entries: sense 0x10, 0x30, 0x50 */ 95 { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */ 96 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 97 }, 98 { 0x00, /* default? must be last */ 99 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 100 } 101 }; 102 103 104 void 105 cgthreeattach(sc, name, isconsole) 106 struct cgthree_softc *sc; 107 char *name; 108 int isconsole; 109 { 110 int i; 111 struct fbdevice *fb = &sc->sc_fb; 112 volatile struct fbcontrol *fbc = sc->sc_fbc; 113 volatile struct bt_regs *bt = &fbc->fbc_dac; 114 115 fb->fb_driver = &cgthreefbdriver; 116 fb->fb_type.fb_cmsize = 256; 117 fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes; 118 printf(": %s, %d x %d", name, 119 fb->fb_type.fb_width, fb->fb_type.fb_height); 120 121 /* Transfer video magic to board, if it's not running */ 122 if ((fbc->fbc_ctrl & FBC_TIMING) == 0) { 123 int sense = (fbc->fbc_status & FBS_MSENSE); 124 /* Search table for video timings fitting this monitor */ 125 for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]); 126 i++) { 127 int j; 128 if (sense != cg3_videoctrl[i].sense) 129 continue; 130 131 printf(" setting video ctrl"); 132 for (j = 0; j < 12; j++) 133 fbc->fbc_vcontrol[j] = 134 cg3_videoctrl[i].vctrl[j]; 135 fbc->fbc_ctrl |= FBC_TIMING; 136 break; 137 } 138 } 139 140 /* Initialize the default color map. */ 141 bt_initcmap(&sc->sc_cmap, 256); 142 cgthreeloadcmap(sc, 0, 256); 143 144 /* make sure we are not blanked */ 145 cgthree_set_video(sc, 1); 146 BT_INIT(bt, 0); 147 148 if (isconsole) { 149 printf(" (console)\n"); 150 #ifdef RASTERCONSOLE 151 fbrcons_init(fb); 152 #endif 153 } else 154 printf("\n"); 155 156 fb_attach(fb, isconsole); 157 } 158 159 160 int 161 cgthreeopen(dev, flags, mode, p) 162 dev_t dev; 163 int flags, mode; 164 struct proc *p; 165 { 166 int unit = minor(dev); 167 168 if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.cd_devs[unit] == NULL) 169 return (ENXIO); 170 return (0); 171 } 172 173 int 174 cgthreeclose(dev, flags, mode, p) 175 dev_t dev; 176 int flags, mode; 177 struct proc *p; 178 { 179 180 return (0); 181 } 182 183 int 184 cgthreeioctl(dev, cmd, data, flags, p) 185 dev_t dev; 186 u_long cmd; 187 caddr_t data; 188 int flags; 189 struct proc *p; 190 { 191 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 192 struct fbgattr *fba; 193 int error; 194 195 switch (cmd) { 196 197 case FBIOGTYPE: 198 *(struct fbtype *)data = sc->sc_fb.fb_type; 199 break; 200 201 case FBIOGATTR: 202 fba = (struct fbgattr *)data; 203 fba->real_type = sc->sc_fb.fb_type.fb_type; 204 fba->owner = 0; /* XXX ??? */ 205 fba->fbtype = sc->sc_fb.fb_type; 206 fba->sattr.flags = 0; 207 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 208 fba->sattr.dev_specific[0] = -1; 209 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 210 fba->emu_types[1] = -1; 211 break; 212 213 case FBIOGETCMAP: 214 #define p ((struct fbcmap *)data) 215 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 216 217 case FBIOPUTCMAP: 218 /* copy to software map */ 219 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 220 if (error) 221 return (error); 222 /* now blast them into the chip */ 223 /* XXX should use retrace interrupt */ 224 cgthreeloadcmap(sc, p->index, p->count); 225 #undef p 226 break; 227 228 case FBIOGVIDEO: 229 *(int *)data = cgthree_get_video(sc); 230 break; 231 232 case FBIOSVIDEO: 233 cgthree_set_video(sc, *(int *)data); 234 break; 235 236 default: 237 return (ENOTTY); 238 } 239 return (0); 240 } 241 242 int 243 cgthreepoll(dev, events, p) 244 dev_t dev; 245 int events; 246 struct proc *p; 247 { 248 249 return (seltrue(dev, events, p)); 250 } 251 252 /* 253 * Undo the effect of an FBIOSVIDEO that turns the video off. 254 */ 255 static void 256 cgthreeunblank(dev) 257 struct device *dev; 258 { 259 260 cgthree_set_video((struct cgthree_softc *)dev, 1); 261 } 262 263 static void 264 cgthree_set_video(sc, enable) 265 struct cgthree_softc *sc; 266 int enable; 267 { 268 269 if (enable) 270 sc->sc_fbc->fbc_ctrl |= FBC_VENAB; 271 else 272 sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB; 273 } 274 275 static int 276 cgthree_get_video(sc) 277 struct cgthree_softc *sc; 278 { 279 280 return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0); 281 } 282 283 /* 284 * Load a subset of the current (new) colormap into the Brooktree DAC. 285 */ 286 static void 287 cgthreeloadcmap(sc, start, ncolors) 288 struct cgthree_softc *sc; 289 int start, ncolors; 290 { 291 volatile struct bt_regs *bt; 292 u_int *ip; 293 int count; 294 295 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 296 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 297 bt = &sc->sc_fbc->fbc_dac; 298 bt->bt_addr = BT_D4M4(start); 299 while (--count >= 0) 300 bt->bt_cmap = *ip++; 301 } 302 303 /* 304 * Return the address that would map the given device at the given 305 * offset, allowing for the given protection, or return -1 for error. 306 * 307 * The cg3 is mapped starting at 256KB, for pseudo-compatibility with 308 * the cg4 (which had an overlay plane in the first 128K and an enable 309 * plane in the next 128K). X11 uses only 256k+ region but tries to 310 * map the whole thing, so we repeatedly map the first 256K to the 311 * first page of the color screen. If someone tries to use the overlay 312 * and enable regions, they will get a surprise.... 313 * 314 * As well, mapping at an offset of 0x04000000 causes the cg3 to be 315 * mapped in flat mode without the cg4 emulation. 316 */ 317 paddr_t 318 cgthreemmap(dev, off, prot) 319 dev_t dev; 320 off_t off; 321 int prot; 322 { 323 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 324 325 #define START (128*1024 + 128*1024) 326 #define NOOVERLAY (0x04000000) 327 328 if (off & PGOFSET) 329 panic("cgthreemmap"); 330 if (off < 0) 331 return (-1); 332 if ((u_int)off >= NOOVERLAY) 333 off -= NOOVERLAY; 334 else if ((u_int)off >= START) 335 off -= START; 336 else 337 off = 0; 338 339 if (off >= sc->sc_fb.fb_type.fb_size) 340 return (-1); 341 342 return (bus_space_mmap(sc->sc_bustag, 343 sc->sc_paddr, CG3REG_MEM + off, 344 prot, BUS_SPACE_MAP_LINEAR)); 345 } 346
Indexes created Tue Sep 23 02:09:52 GMT 2025