1 /* $NetBSD: cgthree.c,v 1.15 2008/04/28 20:23:58 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * color display (cgthree) driver. 34 * 35 * Does not handle interrupts, even though they can occur. 36 * 37 * XXX should defer colormap updates to vertical retrace interrupts 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: cgthree.c,v 1.15 2008/04/28 20:23:58 martin Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/buf.h> 46 #include <sys/device.h> 47 #include <sys/ioctl.h> 48 #include <sys/malloc.h> 49 #include <sys/mman.h> 50 #include <sys/tty.h> 51 #include <sys/conf.h> 52 53 #include <sys/bus.h> 54 #include <machine/autoconf.h> 55 56 #include <dev/sun/fbio.h> 57 #include <dev/sun/fbvar.h> 58 59 #include <dev/sun/btreg.h> 60 #include <dev/sun/btvar.h> 61 #include <dev/sun/cgthreereg.h> 62 #include <dev/sun/cgthreevar.h> 63 64 static void cgthreeunblank(struct device *); 65 static void cgthreeloadcmap(struct cgthree_softc *, int, int); 66 static void cgthree_set_video(struct cgthree_softc *, int); 67 static int cgthree_get_video(struct cgthree_softc *); 68 69 extern struct cfdriver cgthree_cd; 70 71 dev_type_open(cgthreeopen); 72 dev_type_ioctl(cgthreeioctl); 73 dev_type_mmap(cgthreemmap); 74 75 const struct cdevsw cgthree_cdevsw = { 76 cgthreeopen, nullclose, noread, nowrite, cgthreeioctl, 77 nostop, notty, nopoll, cgthreemmap, nokqfilter 78 }; 79 80 /* frame buffer generic driver */ 81 static struct fbdriver cgthreefbdriver = { 82 cgthreeunblank, cgthreeopen, nullclose, cgthreeioctl, nopoll, 83 cgthreemmap, nokqfilter 84 }; 85 86 /* Video control parameters */ 87 struct cg3_videoctrl { 88 unsigned char sense; /* Monitor sense value */ 89 unsigned char vctrl[12]; 90 } cg3_videoctrl[] = { 91 /* Missing entries: sense 0x10, 0x30, 0x50 */ 92 { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */ 93 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 94 }, 95 { 0x00, /* default? must be last */ 96 {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} 97 } 98 }; 99 100 101 void 102 cgthreeattach(sc, name, isconsole) 103 struct cgthree_softc *sc; 104 const char *name; 105 int isconsole; 106 { 107 int i; 108 struct fbdevice *fb = &sc->sc_fb; 109 volatile struct fbcontrol *fbc = sc->sc_fbc; 110 volatile struct bt_regs *bt = &fbc->fbc_dac; 111 112 fb->fb_driver = &cgthreefbdriver; 113 fb->fb_type.fb_cmsize = 256; 114 fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes; 115 printf(": %s, %d x %d", name, 116 fb->fb_type.fb_width, fb->fb_type.fb_height); 117 118 /* Transfer video magic to board, if it's not running */ 119 if ((fbc->fbc_ctrl & FBC_TIMING) == 0) { 120 int sense = (fbc->fbc_status & FBS_MSENSE); 121 /* Search table for video timings fitting this monitor */ 122 for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]); 123 i++) { 124 int j; 125 if (sense != cg3_videoctrl[i].sense) 126 continue; 127 128 printf(" setting video ctrl"); 129 for (j = 0; j < 12; j++) 130 fbc->fbc_vcontrol[j] = 131 cg3_videoctrl[i].vctrl[j]; 132 fbc->fbc_ctrl |= FBC_TIMING; 133 break; 134 } 135 } 136 137 /* Initialize the default color map. */ 138 bt_initcmap(&sc->sc_cmap, 256); 139 cgthreeloadcmap(sc, 0, 256); 140 141 /* make sure we are not blanked */ 142 cgthree_set_video(sc, 1); 143 BT_INIT(bt, 0); 144 145 if (isconsole) { 146 printf(" (console)\n"); 147 #ifdef RASTERCONSOLE 148 fbrcons_init(fb); 149 #endif 150 } else 151 printf("\n"); 152 153 fb_attach(fb, isconsole); 154 } 155 156 157 int 158 cgthreeopen(dev, flags, mode, l) 159 dev_t dev; 160 int flags, mode; 161 struct lwp *l; 162 { 163 int unit = minor(dev); 164 165 if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.cd_devs[unit] == NULL) 166 return (ENXIO); 167 return (0); 168 } 169 170 int 171 cgthreeioctl(dev, cmd, data, flags, l) 172 dev_t dev; 173 u_long cmd; 174 void *data; 175 int flags; 176 struct lwp *l; 177 { 178 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 179 struct fbgattr *fba; 180 int error; 181 182 switch (cmd) { 183 184 case FBIOGTYPE: 185 *(struct fbtype *)data = sc->sc_fb.fb_type; 186 break; 187 188 case FBIOGATTR: 189 fba = (struct fbgattr *)data; 190 fba->real_type = sc->sc_fb.fb_type.fb_type; 191 fba->owner = 0; /* XXX ??? */ 192 fba->fbtype = sc->sc_fb.fb_type; 193 fba->sattr.flags = 0; 194 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 195 fba->sattr.dev_specific[0] = -1; 196 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 197 fba->emu_types[1] = -1; 198 break; 199 200 case FBIOGETCMAP: 201 #define p ((struct fbcmap *)data) 202 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 203 204 case FBIOPUTCMAP: 205 /* copy to software map */ 206 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 207 if (error) 208 return (error); 209 /* now blast them into the chip */ 210 /* XXX should use retrace interrupt */ 211 cgthreeloadcmap(sc, p->index, p->count); 212 #undef p 213 break; 214 215 case FBIOGVIDEO: 216 *(int *)data = cgthree_get_video(sc); 217 break; 218 219 case FBIOSVIDEO: 220 cgthree_set_video(sc, *(int *)data); 221 break; 222 223 default: 224 return (ENOTTY); 225 } 226 return (0); 227 } 228 229 /* 230 * Undo the effect of an FBIOSVIDEO that turns the video off. 231 */ 232 static void 233 cgthreeunblank(dev) 234 struct device *dev; 235 { 236 237 cgthree_set_video((struct cgthree_softc *)dev, 1); 238 } 239 240 static void 241 cgthree_set_video(sc, enable) 242 struct cgthree_softc *sc; 243 int enable; 244 { 245 246 if (enable) 247 sc->sc_fbc->fbc_ctrl |= FBC_VENAB; 248 else 249 sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB; 250 } 251 252 static int 253 cgthree_get_video(sc) 254 struct cgthree_softc *sc; 255 { 256 257 return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0); 258 } 259 260 /* 261 * Load a subset of the current (new) colormap into the Brooktree DAC. 262 */ 263 static void 264 cgthreeloadcmap(sc, start, ncolors) 265 struct cgthree_softc *sc; 266 int start, ncolors; 267 { 268 volatile struct bt_regs *bt; 269 u_int *ip; 270 int count; 271 272 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 273 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 274 bt = &sc->sc_fbc->fbc_dac; 275 bt->bt_addr = BT_D4M4(start); 276 while (--count >= 0) 277 bt->bt_cmap = *ip++; 278 } 279 280 /* 281 * Return the address that would map the given device at the given 282 * offset, allowing for the given protection, or return -1 for error. 283 * 284 * The cg3 is mapped starting at 256KB, for pseudo-compatibility with 285 * the cg4 (which had an overlay plane in the first 128K and an enable 286 * plane in the next 128K). X11 uses only 256k+ region but tries to 287 * map the whole thing, so we repeatedly map the first 256K to the 288 * first page of the color screen. If someone tries to use the overlay 289 * and enable regions, they will get a surprise.... 290 * 291 * As well, mapping at an offset of 0x04000000 causes the cg3 to be 292 * mapped in flat mode without the cg4 emulation. 293 */ 294 paddr_t 295 cgthreemmap(dev, off, prot) 296 dev_t dev; 297 off_t off; 298 int prot; 299 { 300 struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 301 302 #define START (128*1024 + 128*1024) 303 #define NOOVERLAY (0x04000000) 304 305 if (off & PGOFSET) 306 panic("cgthreemmap"); 307 if (off < 0) 308 return (-1); 309 if ((u_int)off >= NOOVERLAY) 310 off -= NOOVERLAY; 311 else if ((u_int)off >= START) 312 off -= START; 313 else 314 off = 0; 315 316 if (off >= sc->sc_fb.fb_type.fb_size) 317 return (-1); 318 319 return (bus_space_mmap(sc->sc_bustag, 320 sc->sc_paddr, CG3REG_MEM + off, 321 prot, BUS_SPACE_MAP_LINEAR)); 322 } 323