cgthree.c revision 1.2.8.2
1 /* $NetBSD: cgthree.c,v 1.2.8.2 2001/10/10 11:57:01 fvdl 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/param.h> 48 #include <sys/systm.h> 49 #include <sys/buf.h> 50 #include <sys/device.h> 51 #include <sys/ioctl.h> 52 #include <sys/malloc.h> 53 #include <sys/mman.h> 54 #include <sys/tty.h> 55 #include <sys/conf.h> 56 #include <sys/vnode.h> 57 58 #include <machine/bus.h> 59 #include <machine/autoconf.h> 60 61 #include <dev/sun/fbio.h> 62 #include <dev/sun/fbvar.h> 63 64 #include <dev/sun/btreg.h> 65 #include <dev/sun/btvar.h> 66 #include <dev/sun/cgthreereg.h> 67 #include <dev/sun/cgthreevar.h> 68 69 #include <machine/conf.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 /* cdevsw prototypes */ 77 cdev_decl(cgthree); 78 79 extern struct cfdriver cgthree_cd; 80 81 /* frame buffer generic driver */ 82 static struct fbdriver cgthreefbdriver = { 83 cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreepoll, 84 cgthreemmap 85 }; 86 87 /* Video control parameters */ 88 struct cg3_videoctrl { 89 unsigned char sense; /* Monitor sense value */ 90 unsigned char vctrl[12]; 91 } cg3_videoctrl[] = { 92 /* Missing entries: sense 0x10, 0x30, 0x50 */ 93 { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */ 94 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 95 }, 96 { 0x00, /* default? must be last */ 97 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 98 } 99 }; 100 101 102 void 103 cgthreeattach(sc, name, isconsole) 104 struct cgthree_softc *sc; 105 char *name; 106 int isconsole; 107 { 108 int i; 109 struct fbdevice *fb = &sc->sc_fb; 110 volatile struct fbcontrol *fbc = sc->sc_fbc; 111 volatile struct bt_regs *bt = &fbc->fbc_dac; 112 113 fb->fb_driver = &cgthreefbdriver; 114 fb->fb_type.fb_cmsize = 256; 115 fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes; 116 printf(": %s, %d x %d", name, 117 fb->fb_type.fb_width, fb->fb_type.fb_height); 118 119 /* Transfer video magic to board, if it's not running */ 120 if ((fbc->fbc_ctrl & FBC_TIMING) == 0) { 121 int sense = (fbc->fbc_status & FBS_MSENSE); 122 /* Search table for video timings fitting this monitor */ 123 for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]); 124 i++) { 125 int j; 126 if (sense != cg3_videoctrl[i].sense) 127 continue; 128 129 printf(" setting video ctrl"); 130 for (j = 0; j < 12; j++) 131 fbc->fbc_vcontrol[j] = 132 cg3_videoctrl[i].vctrl[j]; 133 fbc->fbc_ctrl |= FBC_TIMING; 134 break; 135 } 136 } 137 138 /* Initialize the default color map. */ 139 bt_initcmap(&sc->sc_cmap, 256); 140 cgthreeloadcmap(sc, 0, 256); 141 142 /* make sure we are not blanked */ 143 cgthree_set_video(sc, 1); 144 BT_INIT(bt, 0); 145 146 if (isconsole) { 147 printf(" (console)\n"); 148 #ifdef RASTERCONSOLE 149 fbrcons_init(fb); 150 #endif 151 } else 152 printf("\n"); 153 154 fb_attach(fb, isconsole); 155 } 156 157 158 int 159 cgthreeopen(devvp, flags, mode, p) 160 struct vnode *devvp; 161 int flags, mode; 162 struct proc *p; 163 { 164 dev_t dev = vdev_rdev(devvp); 165 int unit = minor(dev); 166 167 if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.cd_devs[unit] == NULL) 168 return (ENXIO); 169 vdev_setprivdata(devvp, cgthree_cd.cd_devs[unit]); 170 return (0); 171 } 172 173 int 174 cgthreeclose(devvp, flags, mode, p) 175 struct vnode *devvp; 176 int flags, mode; 177 struct proc *p; 178 { 179 180 return (0); 181 } 182 183 int 184 cgthreeioctl(devvp, cmd, data, flags, p) 185 struct vnode *devvp; 186 u_long cmd; 187 caddr_t data; 188 int flags; 189 struct proc *p; 190 { 191 struct cgthree_softc *sc = vdev_privdata(devvp); 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(devvp, events, p) 244 struct vnode *devvp; 245 int events; 246 struct proc *p; 247 { 248 249 return (seltrue(devvp, 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(devvp, off, prot) 319 struct vnode *devvp; 320 off_t off; 321 int prot; 322 { 323 struct cgthree_softc *sc = vdev_privdata(devvp); 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 Fri Oct 03 02:09:57 GMT 2025