1 /* $NetBSD: fb.c,v 1.9 2002/10/23 09:12:25 jdolecek Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)fb.c 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * /dev/fb (indirect frame buffer driver). 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/conf.h> 54 #include <sys/device.h> 55 #include <sys/ioctl.h> 56 #include <sys/proc.h> 57 58 #include <machine/eeprom.h> 59 #include <dev/sun/fbio.h> 60 61 #include <sun3/dev/fbvar.h> 62 #include <sun3/dev/p4reg.h> 63 64 dev_type_open(fbopen); 65 dev_type_close(fbclose); 66 dev_type_ioctl(fbioctl); 67 dev_type_mmap(fbmmap); 68 69 const struct cdevsw fb_cdevsw = { 70 fbopen, fbclose, noread, nowrite, fbioctl, 71 nostop, notty, nopoll, fbmmap, nokqfilter, 72 }; 73 74 static struct fbdevice *devfb; 75 static int fbpriority; 76 77 /* 78 * This is called by the real driver (i.e. bw2, cg3, ...) 79 * to declare itself as a potential default frame buffer. 80 */ 81 void 82 fb_attach(fb, newpri) 83 struct fbdevice *fb; 84 int newpri; 85 { 86 if (fbpriority < newpri) { 87 fbpriority = newpri; 88 devfb = fb; 89 } 90 } 91 92 int 93 fbopen(dev, flags, mode, p) 94 dev_t dev; 95 int flags, mode; 96 struct proc *p; 97 { 98 99 if (devfb == NULL) 100 return (ENXIO); 101 return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p)); 102 } 103 104 int 105 fbclose(dev, flags, mode, p) 106 dev_t dev; 107 int flags, mode; 108 struct proc *p; 109 { 110 111 return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p)); 112 } 113 114 int 115 fbioctl(dev, cmd, data, flags, p) 116 dev_t dev; 117 u_long cmd; 118 caddr_t data; 119 int flags; 120 struct proc *p; 121 { 122 return (fbioctlfb(devfb, cmd, data)); 123 } 124 125 paddr_t 126 fbmmap(dev, off, prot) 127 dev_t dev; 128 off_t off; 129 int prot; 130 { 131 return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot)); 132 } 133 134 /* 135 * Common fb ioctl function 136 */ 137 int 138 fbioctlfb(fb, cmd, data) 139 struct fbdevice *fb; 140 u_long cmd; 141 caddr_t data; 142 { 143 struct fbdriver *fbd = fb->fb_driver; 144 void *vp = (void *)data; 145 int error; 146 147 switch (cmd) { 148 149 case FBIOGTYPE: 150 *(struct fbtype *)vp = fb->fb_fbtype; 151 error = 0; 152 break; 153 154 case FBIOGATTR: 155 error = (*fbd->fbd_gattr)(fb, vp); 156 break; 157 158 case FBIOGVIDEO: 159 error = (*fbd->fbd_gvideo)(fb, vp); 160 break; 161 162 case FBIOSVIDEO: 163 error = (*fbd->fbd_svideo)(fb, vp); 164 break; 165 166 case FBIOGETCMAP: 167 error = (*fbd->fbd_getcmap)(fb, vp); 168 break; 169 170 case FBIOPUTCMAP: 171 error = (*fbd->fbd_putcmap)(fb, vp); 172 break; 173 174 default: 175 error = ENOTTY; 176 } 177 return (error); 178 } 179 180 void 181 fb_unblank() 182 { 183 int on = 1; 184 185 if (devfb == NULL) 186 return; 187 188 (*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on); 189 } 190 191 /* 192 * Default ioctl function to put in struct fbdriver 193 * for functions that are not supported. 194 */ 195 int 196 fb_noioctl(fbd, vp) 197 struct fbdevice *fbd; 198 void *vp; 199 { 200 return ENOTTY; 201 } 202 203 /**************************************************************** 204 * Misc. helpers... 205 */ 206 207 /* Set FB size based on EEPROM screen shape code. */ 208 void 209 fb_eeprom_setsize(fb) 210 struct fbdevice *fb; 211 { 212 int szcode; 213 int w, h; 214 215 /* Go get the EEPROM screen size byte. */ 216 szcode = eeprom_copy->eeScreenSize; 217 218 w = h = 0; 219 switch (szcode) { 220 case EE_SCR_1152X900: 221 w = 1152; 222 h = 900; 223 break; 224 case EE_SCR_1024X1024: 225 w = 1024; 226 h = 1024; 227 break; 228 case EE_SCR_1600X1280: 229 w = 1600; 230 h = 1280; 231 break; 232 case EE_SCR_1440X1440: 233 w = 1440; 234 h = 1440; 235 break; 236 default: 237 break; 238 } 239 240 if (w && h) { 241 fb->fb_fbtype.fb_width = w; 242 fb->fb_fbtype.fb_height = h; 243 } else { 244 printf("%s: EE size code %d unknown\n", 245 fb->fb_name, szcode); 246 } 247 } 248 249 /* 250 * Probe for a P4 register at the passed virtual address. 251 * Returns P4 ID value, or -1 if no P4 register. 252 */ 253 int 254 fb_pfour_id(va) 255 void *va; 256 { 257 volatile u_int32_t val, save, *pfour = va; 258 259 /* Read the P4 register. */ 260 save = *pfour; 261 262 /* 263 * Try to modify the type code. If it changes, put the 264 * original value back, and tell the caller that the 265 * framebuffer does not have a P4 register. 266 */ 267 val = save & ~P4_REG_RESET; 268 *pfour = (val ^ P4_FBTYPE_MASK); 269 if ((*pfour ^ val) & P4_FBTYPE_MASK) { 270 *pfour = save; 271 return (-1); 272 } 273 274 return (P4_ID(val)); 275 } 276 277 /* 278 * Return the status of the video enable. 279 */ 280 int 281 fb_pfour_get_video(fb) 282 struct fbdevice *fb; 283 { 284 285 return ((*fb->fb_pfour & P4_REG_VIDEO) != 0); 286 } 287 288 /* 289 * Turn video on or off using the P4 register. 290 */ 291 void 292 fb_pfour_set_video(fb, on) 293 struct fbdevice *fb; 294 int on; 295 { 296 int pfour; 297 298 pfour = *fb->fb_pfour & ~(P4_REG_INTCLR|P4_REG_VIDEO); 299 *fb->fb_pfour = pfour | (on ? P4_REG_VIDEO : 0); 300 } 301 302 static const struct { 303 int w, h; 304 } fb_p4sizedecode[P4_SIZE_MASK+1] = { 305 { 1600, 1280 }, 306 { 1152, 900 }, 307 { 1024, 1024 }, 308 { 1280, 1024 }, 309 { 1440, 1440 }, 310 { 640, 480 }, 311 }; 312 313 /* 314 * Use the P4 register to determine the screen size. 315 */ 316 void 317 fb_pfour_setsize(fb) 318 struct fbdevice *fb; 319 { 320 int p4, p4type, p4size; 321 int h, w; 322 323 if (fb->fb_pfour == 0) 324 return; 325 326 p4 = *fb->fb_pfour; 327 p4type = P4_FBTYPE(p4); 328 329 /* These do not encode the screen size. */ 330 if (p4type == P4_ID_COLOR24) 331 return; 332 if ((p4type & P4_ID_MASK) == P4_ID_FASTCOLOR) 333 return; 334 335 p4size = p4type & P4_SIZE_MASK; 336 w = fb_p4sizedecode[p4size].w; 337 h = fb_p4sizedecode[p4size].h; 338 if (w && h) { 339 fb->fb_fbtype.fb_width = w; 340 fb->fb_fbtype.fb_height = h; 341 } else { 342 printf("%s: P4 size code %d unknown\n", 343 fb->fb_name, p4size); 344 } 345 } 346