1 /* $NetBSD: fb.c,v 1.37 2019/11/10 21:16:37 chs 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 1.37 2019/11/10 21:16:37 chs 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 fbl->fb_next = malloc(sizeof (struct fbdevlist), 176 M_DEVBUF, M_WAITOK); 177 fbl = fbl->fb_next; 178 nfb++; 179 fbl->fb_dev = fblist.fb_dev; 180 fbl->fb_next = NULL; 181 aprint_normal_dev(fbl->fb_dev->fb_device, 182 "moved to /dev/fb%d\n", nfb); 183 aprint_normal_dev(fbl->fb_dev->fb_device, 184 "attached to /dev/fb0\n"); 185 fblist.fb_dev = fb; 186 if (fb->fb_flags & FB_FORCE) 187 seen_force = 1; 188 /* Add to end of fb list. */ 189 } else { 190 if (fblist.fb_dev != NULL) { 191 while (fbl->fb_next != NULL) { 192 fbl = fbl->fb_next; 193 nfb++; 194 } 195 fbl->fb_next = malloc(sizeof (struct fbdevlist), 196 M_DEVBUF, M_WAITOK); 197 fbl = fbl->fb_next; 198 nfb++; 199 } 200 fbl->fb_dev = fb; 201 fbl->fb_next = NULL; 202 aprint_normal_dev(fbl->fb_dev->fb_device, 203 "attached to /dev/fb%d\n", nfb); 204 } 205 } 206 207 int 208 fbopen(dev_t dev, int flags, int mode, struct lwp *l) 209 { 210 int unit, nunit; 211 struct fbdevlist *fbl = &fblist; 212 213 unit = minor(dev); 214 while (unit-- && fbl != NULL) 215 fbl = fbl->fb_next; 216 if (fbl == NULL || fbl->fb_dev == NULL) 217 return (ENXIO); 218 219 nunit = device_unit(fbl->fb_dev->fb_device); 220 return (fbl->fb_dev->fb_driver->fbd_open)(makedev(0, nunit), flags, 221 mode, l); 222 } 223 224 int 225 fbclose(dev_t dev, int flags, int mode, struct lwp *l) 226 { 227 int unit, nunit; 228 struct fbdevlist *fbl = &fblist; 229 230 unit = minor(dev); 231 while (unit-- && fbl != NULL) 232 fbl = fbl->fb_next; 233 if (fbl == NULL || fbl->fb_dev == NULL) 234 return (ENXIO); 235 236 nunit = device_unit(fbl->fb_dev->fb_device); 237 return (fbl->fb_dev->fb_driver->fbd_close)(makedev(0, nunit), flags, 238 mode, l); 239 } 240 241 int 242 fbioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 243 { 244 int unit, nunit; 245 struct fbdevlist *fbl = &fblist; 246 247 unit = minor(dev); 248 while (unit-- && fbl != NULL) 249 fbl = fbl->fb_next; 250 if (fbl == NULL || fbl->fb_dev == NULL) 251 return (ENXIO); 252 253 nunit = device_unit(fbl->fb_dev->fb_device); 254 return (fbl->fb_dev->fb_driver->fbd_ioctl)(makedev(0, nunit), cmd, 255 data, flags, l); 256 } 257 258 int 259 fbpoll(dev_t dev, int events, struct lwp *l) 260 { 261 int unit, nunit; 262 struct fbdevlist *fbl = &fblist; 263 264 unit = minor(dev); 265 while (unit-- && fbl != NULL) 266 fbl = fbl->fb_next; 267 if (fbl == NULL || fbl->fb_dev == NULL) 268 return (ENXIO); 269 270 nunit = device_unit(fbl->fb_dev->fb_device); 271 return (fbl->fb_dev->fb_driver->fbd_poll)(makedev(0, nunit), events, 272 l); 273 } 274 275 int 276 fbkqfilter(dev_t dev, struct knote *kn) 277 { 278 int unit, nunit; 279 struct fbdevlist *fbl = &fblist; 280 281 unit = minor(dev); 282 while (unit-- && fbl != NULL) 283 fbl = fbl->fb_next; 284 if (fbl == NULL || fbl->fb_dev == NULL) 285 return (ENXIO); 286 287 nunit = device_unit(fbl->fb_dev->fb_device); 288 return (fbl->fb_dev->fb_driver->fbd_kqfilter)(makedev(0, nunit), kn); 289 } 290 291 paddr_t 292 fbmmap(dev_t dev, off_t off, int prot) 293 { 294 int unit, nunit; 295 struct fbdevlist *fbl = &fblist; 296 297 unit = minor(dev); 298 while (unit-- && fbl != NULL) 299 fbl = fbl->fb_next; 300 if (fbl == NULL || fbl->fb_dev == NULL) 301 return (ENXIO); 302 303 nunit = device_unit(fbl->fb_dev->fb_device); 304 paddr_t (*map)(dev_t, off_t, int) = fbl->fb_dev->fb_driver->fbd_mmap; 305 306 if (map == NULL) 307 return (-1); 308 return (map(makedev(0, nunit), off, prot)); 309 } 310 311 void 312 fb_setsize_obp(struct fbdevice *fb, int depth, int def_width, int def_height, int node) 313 { 314 fb->fb_type.fb_width = prom_getpropint(node, "width", def_width); 315 fb->fb_type.fb_height = prom_getpropint(node, "height", def_height); 316 fb->fb_linebytes = prom_getpropint(node, "linebytes", 317 (fb->fb_type.fb_width * depth) / 8); 318 } 319 320 void 321 fb_setsize_eeprom(struct fbdevice *fb, int depth, int def_width, int def_height) 322 { 323 #if !defined(SUN4U) 324 struct eeprom *eep = (struct eeprom *)eeprom_va; 325 326 if (!CPU_ISSUN4) { 327 printf("fb_setsize_eeprom: not sun4\n"); 328 return; 329 } 330 331 /* Set up some defaults. */ 332 fb->fb_type.fb_width = def_width; 333 fb->fb_type.fb_height = def_height; 334 335 if (fb->fb_flags & FB_PFOUR) { 336 #if NPFOUR > 0 337 fb_setsize_pfour(fb); 338 #endif 339 } else if (eep != NULL) { 340 switch (eep->eeScreenSize) { 341 case EE_SCR_1152X900: 342 fb->fb_type.fb_width = 1152; 343 fb->fb_type.fb_height = 900; 344 break; 345 346 case EE_SCR_1024X1024: 347 fb->fb_type.fb_width = 1024; 348 fb->fb_type.fb_height = 1024; 349 break; 350 351 case EE_SCR_1600X1280: 352 fb->fb_type.fb_width = 1600; 353 fb->fb_type.fb_height = 1280; 354 break; 355 356 case EE_SCR_1440X1440: 357 fb->fb_type.fb_width = 1440; 358 fb->fb_type.fb_height = 1440; 359 break; 360 361 default: 362 /* 363 * XXX: Do nothing, I guess. 364 * Should we print a warning about 365 * an unknown value? --thorpej 366 */ 367 break; 368 } 369 } 370 371 fb->fb_linebytes = (fb->fb_type.fb_width * depth) / 8; 372 #endif /* !SUN4U */ 373 } 374
Indexes created Sat Sep 20 22:09:52 GMT 2025