fb.c revision 1.33.20.2
1 /* $NetBSD: fb.c,v 1.33.20.2 2017/12/03 11:37:33 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. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fb.c 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * /dev/fb (indirect frame buffer driver). This is gross; we should 45 * just build cdevsw[] dynamically. 46 */ 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: fb.c,v 1.33.20.2 2017/12/03 11:37:33 jdolecek Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/device.h> 54 #include <sys/proc.h> 55 #include <sys/conf.h> 56 #include <sys/malloc.h> 57 #include <sys/types.h> 58 59 #include <machine/promlib.h> 60 #include <machine/autoconf.h> 61 #include <machine/kbd.h> 62 #include <machine/eeprom.h> 63 #include <sparc/dev/cons.h> 64 65 #include <dev/sun/fbio.h> 66 #include <dev/sun/fbvar.h> 67 68 #include "kbd.h" 69 #include "pfour.h" 70 71 72 struct fbdevlist { 73 struct fbdevice *fb_dev; 74 struct fbdevlist *fb_next; 75 }; 76 77 static struct fbdevlist fblist = { 78 NULL, 79 NULL, 80 }; 81 82 dev_type_open(fbopen); 83 dev_type_close(fbclose); 84 dev_type_ioctl(fbioctl); 85 dev_type_poll(fbpoll); 86 dev_type_mmap(fbmmap); 87 dev_type_kqfilter(fbkqfilter); 88 89 const struct cdevsw fb_cdevsw = { 90 .d_open = fbopen, 91 .d_close = fbclose, 92 .d_read = noread, 93 .d_write = nowrite, 94 .d_ioctl = fbioctl, 95 .d_stop = nostop, 96 .d_tty = notty, 97 .d_poll = fbpoll, 98 .d_mmap = fbmmap, 99 .d_kqfilter = fbkqfilter, 100 .d_discard = nodiscard, 101 .d_flag = D_OTHER 102 }; 103 104 void 105 fb_unblank(void) 106 { 107 108 struct fbdevlist *fbl = &fblist; 109 110 while (fbl != NULL && fbl->fb_dev != NULL) { 111 (*fbl->fb_dev->fb_driver->fbd_unblank)(fbl->fb_dev->fb_device); 112 fbl = fbl->fb_next; 113 } 114 } 115 116 /* 117 * Helper function for frame buffer devices. Decides whether 118 * the device can be the console output device according to 119 * PROM info. The result from this function may not be conclusive 120 * on machines with old PROMs; in that case, drivers should consult 121 * other sources of configuration information (e.g. EEPROM entries). 122 */ 123 int 124 fb_is_console(int node) 125 { 126 #if !defined(SUN4U) 127 int fbnode; 128 129 switch (prom_version()) { 130 case PROM_OLDMON: 131 /* `node' is not valid; just check for any fb device */ 132 return (prom_stdout() == PROMDEV_SCREEN); 133 134 case PROM_OBP_V0: 135 /* 136 * First, check if prom_stdout() represents a frame buffer, 137 * then match on the `fb' property on the root node, if any. 138 */ 139 if (prom_stdout() != PROMDEV_SCREEN) 140 return (0); 141 142 fbnode = prom_getpropint(findroot(), "fb", 0); 143 return (fbnode == 0 || node == fbnode); 144 145 case PROM_OBP_V2: 146 case PROM_OBP_V3: 147 case PROM_OPENFIRM: 148 /* Just match the nodes */ 149 return (node == prom_stdout_node); 150 } 151 152 return (0); 153 #else 154 return (node == prom_stdout_node); 155 #endif 156 } 157 158 void 159 fb_attach(struct fbdevice *fb, int isconsole) 160 { 161 static int seen_force = 0; 162 int nfb = 0; 163 struct fbdevlist *fbl = &fblist; 164 165 /* 166 * Check to see if we're being forced into /dev/fb0, or if we're 167 * the console. If we are, then move/replace the current fb0. 168 */ 169 if ((fb->fb_flags & FB_FORCE || (isconsole && !seen_force)) && 170 fblist.fb_dev != NULL) { 171 while (fbl->fb_next != NULL) { 172 fbl = fbl->fb_next; 173 nfb++; 174 } 175 if ((fbl->fb_next = malloc(sizeof (struct fbdevlist), 176 M_DEVBUF, M_NOWAIT)) == NULL) 177 printf("%s: replacing %s at /dev/fb0\n", 178 device_xname(fb->fb_device), 179 device_xname(fblist.fb_dev->fb_device)); 180 else { 181 fbl = fbl->fb_next; 182 nfb++; 183 fbl->fb_dev = fblist.fb_dev; 184 fbl->fb_next = NULL; 185 aprint_normal_dev(fbl->fb_dev->fb_device, 186 "moved to /dev/fb%d\n", nfb); 187 aprint_normal_dev(fbl->fb_dev->fb_device, 188 "attached to /dev/fb0\n"); 189 } 190 fblist.fb_dev = fb; 191 if (fb->fb_flags & FB_FORCE) 192 seen_force = 1; 193 /* Add to end of fb list. */ 194 } else { 195 if (fblist.fb_dev != NULL) { 196 while (fbl->fb_next != NULL) { 197 fbl = fbl->fb_next; 198 nfb++; 199 } 200 if ((fbl->fb_next = malloc(sizeof (struct fbdevlist), 201 M_DEVBUF, M_NOWAIT)) == NULL) { 202 aprint_error_dev(fb->fb_device, 203 "no space to attach after /dev/fb%d\n", 204 nfb); 205 return; 206 } 207 fbl = fbl->fb_next; 208 nfb++; 209 } 210 fbl->fb_dev = fb; 211 fbl->fb_next = NULL; 212 aprint_normal_dev(fbl->fb_dev->fb_device, 213 "attached to /dev/fb%d\n", nfb); 214 } 215 } 216 217 int 218 fbopen(dev_t dev, int flags, int mode, struct lwp *l) 219 { 220 int unit, nunit; 221 struct fbdevlist *fbl = &fblist; 222 223 unit = minor(dev); 224 while (unit-- && fbl != NULL) 225 fbl = fbl->fb_next; 226 if (fbl == NULL || fbl->fb_dev == NULL) 227 return (ENXIO); 228 229 nunit = device_unit(fbl->fb_dev->fb_device); 230 return (fbl->fb_dev->fb_driver->fbd_open)(makedev(0, nunit), flags, 231 mode, l); 232 } 233 234 int 235 fbclose(dev_t dev, int flags, int mode, struct lwp *l) 236 { 237 int unit, nunit; 238 struct fbdevlist *fbl = &fblist; 239 240 unit = minor(dev); 241 while (unit-- && fbl != NULL) 242 fbl = fbl->fb_next; 243 if (fbl == NULL || fbl->fb_dev == NULL) 244 return (ENXIO); 245 246 nunit = device_unit(fbl->fb_dev->fb_device); 247 return (fbl->fb_dev->fb_driver->fbd_close)(makedev(0, nunit), flags, 248 mode, l); 249 } 250 251 int 252 fbioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 253 { 254 int unit, nunit; 255 struct fbdevlist *fbl = &fblist; 256 257 unit = minor(dev); 258 while (unit-- && fbl != NULL) 259 fbl = fbl->fb_next; 260 if (fbl == NULL || fbl->fb_dev == NULL) 261 return (ENXIO); 262 263 nunit = device_unit(fbl->fb_dev->fb_device); 264 return (fbl->fb_dev->fb_driver->fbd_ioctl)(makedev(0, nunit), cmd, 265 data, flags, l); 266 } 267 268 int 269 fbpoll(dev_t dev, int events, struct lwp *l) 270 { 271 int unit, nunit; 272 struct fbdevlist *fbl = &fblist; 273 274 unit = minor(dev); 275 while (unit-- && fbl != NULL) 276 fbl = fbl->fb_next; 277 if (fbl == NULL || fbl->fb_dev == NULL) 278 return (ENXIO); 279 280 nunit = device_unit(fbl->fb_dev->fb_device); 281 return (fbl->fb_dev->fb_driver->fbd_poll)(makedev(0, nunit), events, 282 l); 283 } 284 285 int 286 fbkqfilter(dev_t dev, struct knote *kn) 287 { 288 int unit, nunit; 289 struct fbdevlist *fbl = &fblist; 290 291 unit = minor(dev); 292 while (unit-- && fbl != NULL) 293 fbl = fbl->fb_next; 294 if (fbl == NULL || fbl->fb_dev == NULL) 295 return (ENXIO); 296 297 nunit = device_unit(fbl->fb_dev->fb_device); 298 return (fbl->fb_dev->fb_driver->fbd_kqfilter)(makedev(0, nunit), kn); 299 } 300 301 paddr_t 302 fbmmap(dev_t dev, off_t off, int prot) 303 { 304 int unit, nunit; 305 struct fbdevlist *fbl = &fblist; 306 307 unit = minor(dev); 308 while (unit-- && fbl != NULL) 309 fbl = fbl->fb_next; 310 if (fbl == NULL || fbl->fb_dev == NULL) 311 return (ENXIO); 312 313 nunit = device_unit(fbl->fb_dev->fb_device); 314 paddr_t (*map)(dev_t, off_t, int) = fbl->fb_dev->fb_driver->fbd_mmap; 315 316 if (map == NULL) 317 return (-1); 318 return (map(makedev(0, nunit), off, prot)); 319 } 320 321 void 322 fb_setsize_obp(struct fbdevice *fb, int depth, int def_width, int def_height, int node) 323 { 324 fb->fb_type.fb_width = prom_getpropint(node, "width", def_width); 325 fb->fb_type.fb_height = prom_getpropint(node, "height", def_height); 326 fb->fb_linebytes = prom_getpropint(node, "linebytes", 327 (fb->fb_type.fb_width * depth) / 8); 328 } 329 330 void 331 fb_setsize_eeprom(struct fbdevice *fb, int depth, int def_width, int def_height) 332 { 333 #if !defined(SUN4U) 334 struct eeprom *eep = (struct eeprom *)eeprom_va; 335 336 if (!CPU_ISSUN4) { 337 printf("fb_setsize_eeprom: not sun4\n"); 338 return; 339 } 340 341 /* Set up some defaults. */ 342 fb->fb_type.fb_width = def_width; 343 fb->fb_type.fb_height = def_height; 344 345 if (fb->fb_flags & FB_PFOUR) { 346 #if NPFOUR > 0 347 fb_setsize_pfour(fb); 348 #endif 349 } else if (eep != NULL) { 350 switch (eep->eeScreenSize) { 351 case EE_SCR_1152X900: 352 fb->fb_type.fb_width = 1152; 353 fb->fb_type.fb_height = 900; 354 break; 355 356 case EE_SCR_1024X1024: 357 fb->fb_type.fb_width = 1024; 358 fb->fb_type.fb_height = 1024; 359 break; 360 361 case EE_SCR_1600X1280: 362 fb->fb_type.fb_width = 1600; 363 fb->fb_type.fb_height = 1280; 364 break; 365 366 case EE_SCR_1440X1440: 367 fb->fb_type.fb_width = 1440; 368 fb->fb_type.fb_height = 1440; 369 break; 370 371 default: 372 /* 373 * XXX: Do nothing, I guess. 374 * Should we print a warning about 375 * an unknown value? --thorpej 376 */ 377 break; 378 } 379 } 380 381 fb->fb_linebytes = (fb->fb_type.fb_width * depth) / 8; 382 #endif /* !SUN4U */ 383 } 384 385
Indexes created Wed Oct 15 16:09:53 GMT 2025