Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/fb.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer as 12 * the first lines of this file unmodified. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include "opt_fb.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/conf.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/uio.h> 44 #include <sys/fbio.h> 45 #include <sys/linker_set.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #include <dev/fb/fbreg.h> 51 52 SET_DECLARE(videodriver_set, const video_driver_t); 53 54 /* local arrays */ 55 56 /* 57 * We need at least one entry each in order to initialize a video card 58 * for the kernel console. The arrays will be increased dynamically 59 * when necessary. 60 */ 61 62 static int vid_malloc; 63 static int adapters = 1; 64 static video_adapter_t *adp_ini; 65 static video_adapter_t **adapter = &adp_ini; 66 static video_switch_t *vidsw_ini; 67 video_switch_t **vidsw = &vidsw_ini; 68 69 #define ARRAY_DELTA 4 70 71 static int 72 vid_realloc_array(void) 73 { 74 video_adapter_t **new_adp; 75 video_switch_t **new_vidsw; 76 int newsize; 77 int s; 78 79 if (!vid_malloc) 80 return ENOMEM; 81 82 s = spltty(); 83 newsize = rounddown(adapters + ARRAY_DELTA, ARRAY_DELTA); 84 new_adp = malloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK | M_ZERO); 85 new_vidsw = malloc(sizeof(*new_vidsw)*newsize, M_DEVBUF, 86 M_WAITOK | M_ZERO); 87 bcopy(adapter, new_adp, sizeof(*adapter)*adapters); 88 bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters); 89 if (adapters > 1) { 90 free(adapter, M_DEVBUF); 91 free(vidsw, M_DEVBUF); 92 } 93 adapter = new_adp; 94 vidsw = new_vidsw; 95 adapters = newsize; 96 splx(s); 97 98 if (bootverbose) 99 printf("fb: new array size %d\n", adapters); 100 101 return 0; 102 } 103 104 static void 105 vid_malloc_init(void *arg) 106 { 107 vid_malloc = TRUE; 108 } 109 110 SYSINIT(vid_mem, SI_SUB_KMEM, SI_ORDER_ANY, vid_malloc_init, NULL); 111 112 /* 113 * Low-level frame buffer driver functions 114 * frame buffer subdrivers, such as the VGA driver, call these functions 115 * to initialize the video_adapter structure and register it to the virtual 116 * frame buffer driver `fb'. 117 */ 118 119 /* initialize the video_adapter_t structure */ 120 void 121 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit) 122 { 123 adp->va_flags = 0; 124 adp->va_name = name; 125 adp->va_type = type; 126 adp->va_unit = unit; 127 } 128 129 /* Register a video adapter */ 130 int 131 vid_register(video_adapter_t *adp) 132 { 133 const video_driver_t **list; 134 const video_driver_t *p; 135 int index; 136 137 for (index = 0; index < adapters; ++index) { 138 if (adapter[index] == NULL) 139 break; 140 } 141 if (index >= adapters) { 142 if (vid_realloc_array()) 143 return -1; 144 } 145 146 adp->va_index = index; 147 adp->va_token = NULL; 148 SET_FOREACH(list, videodriver_set) { 149 p = *list; 150 if (strcmp(p->name, adp->va_name) == 0) { 151 adapter[index] = adp; 152 vidsw[index] = p->vidsw; 153 return index; 154 } 155 } 156 157 return -1; 158 } 159 160 int 161 vid_unregister(video_adapter_t *adp) 162 { 163 if ((adp->va_index < 0) || (adp->va_index >= adapters)) 164 return ENOENT; 165 if (adapter[adp->va_index] != adp) 166 return ENOENT; 167 168 adapter[adp->va_index] = NULL; 169 vidsw[adp->va_index] = NULL; 170 return 0; 171 } 172 173 /* Get video I/O function table */ 174 video_switch_t 175 *vid_get_switch(char *name) 176 { 177 const video_driver_t **list; 178 const video_driver_t *p; 179 180 SET_FOREACH(list, videodriver_set) { 181 p = *list; 182 if (strcmp(p->name, name) == 0) 183 return p->vidsw; 184 } 185 186 return NULL; 187 } 188 189 /* 190 * Video card client functions 191 * Video card clients, such as the console driver `syscons' and the frame 192 * buffer cdev driver, use these functions to claim and release a card for 193 * exclusive use. 194 */ 195 196 /* find the video card specified by a driver name and a unit number */ 197 int 198 vid_find_adapter(char *driver, int unit) 199 { 200 int i; 201 202 for (i = 0; i < adapters; ++i) { 203 if (adapter[i] == NULL) 204 continue; 205 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver)) 206 continue; 207 if ((unit != -1) && (adapter[i]->va_unit != unit)) 208 continue; 209 return i; 210 } 211 return -1; 212 } 213 214 /* allocate a video card */ 215 int 216 vid_allocate(char *driver, int unit, void *id) 217 { 218 int index; 219 int s; 220 221 s = spltty(); 222 index = vid_find_adapter(driver, unit); 223 if (index >= 0) { 224 if (adapter[index]->va_token) { 225 splx(s); 226 return -1; 227 } 228 adapter[index]->va_token = id; 229 } 230 splx(s); 231 return index; 232 } 233 234 int 235 vid_release(video_adapter_t *adp, void *id) 236 { 237 int error; 238 int s; 239 240 s = spltty(); 241 if (adp->va_token == NULL) { 242 error = EINVAL; 243 } else if (adp->va_token != id) { 244 error = EPERM; 245 } else { 246 adp->va_token = NULL; 247 error = 0; 248 } 249 splx(s); 250 return error; 251 } 252 253 /* Get a video adapter structure */ 254 video_adapter_t 255 *vid_get_adapter(int index) 256 { 257 if ((index < 0) || (index >= adapters)) 258 return NULL; 259 return adapter[index]; 260 } 261 262 /* Configure drivers: this is a backdoor for the console driver XXX */ 263 int 264 vid_configure(int flags) 265 { 266 const video_driver_t **list; 267 const video_driver_t *p; 268 269 SET_FOREACH(list, videodriver_set) { 270 p = *list; 271 if (p->configure != NULL) 272 (*p->configure)(flags); 273 } 274 275 return 0; 276 } 277 278 #define FB_DRIVER_NAME "fb" 279 280 static char 281 *adapter_name(int type) 282 { 283 static struct { 284 int type; 285 char *name; 286 } names[] = { 287 { KD_MONO, "MDA" }, 288 { KD_HERCULES, "Hercules" }, 289 { KD_CGA, "CGA" }, 290 { KD_EGA, "EGA" }, 291 { KD_VGA, "VGA" }, 292 { KD_TGA, "TGA" }, 293 { -1, "Unknown" }, 294 }; 295 int i; 296 297 for (i = 0; names[i].type != -1; ++i) 298 if (names[i].type == type) 299 break; 300 return names[i].name; 301 } 302 303 /* 304 * Generic low-level frame buffer functions 305 * The low-level functions in the frame buffer subdriver may use these 306 * functions. 307 */ 308 309 void 310 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level) 311 { 312 if (level <= 0) 313 return; 314 315 printf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n", 316 FB_DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name, 317 adapter_name(adp->va_type), adp->va_type, adp->va_flags); 318 printf("%s%d: port:0x%lx-0x%lx, crtc:0x%lx, mem:0x%lx 0x%x\n", 319 FB_DRIVER_NAME, adp->va_index, (u_long)adp->va_io_base, 320 (u_long)adp->va_io_base + adp->va_io_size - 1, 321 (u_long)adp->va_crtc_addr, (u_long)adp->va_mem_base, 322 adp->va_mem_size); 323 printf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n", 324 FB_DRIVER_NAME, adp->va_index, 325 adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode); 326 printf("%s%d: window:%p size:%dk gran:%dk, buf:%p size:%dk\n", 327 FB_DRIVER_NAME, adp->va_index, 328 (void *)adp->va_window, (int)adp->va_window_size/1024, 329 (int)adp->va_window_gran/1024, (void *)adp->va_buffer, 330 (int)adp->va_buffer_size/1024); 331 } 332 333 void 334 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info, 335 int level) 336 { 337 if (level <= 0) 338 return; 339 340 printf("%s%d: %s, mode:%d, flags:0x%x ", 341 driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags); 342 if (info->vi_flags & V_INFO_GRAPHICS) 343 printf("G %dx%dx%d, %d plane(s), font:%dx%d, ", 344 info->vi_width, info->vi_height, 345 info->vi_depth, info->vi_planes, 346 info->vi_cwidth, info->vi_cheight); 347 else 348 printf("T %dx%d, font:%dx%d, ", 349 info->vi_width, info->vi_height, 350 info->vi_cwidth, info->vi_cheight); 351 printf("win:0x%lx\n", (u_long)info->vi_window); 352 } 353 354 int 355 fb_type(int adp_type) 356 { 357 static struct { 358 int fb_type; 359 int va_type; 360 } types[] = { 361 { FBTYPE_MDA, KD_MONO }, 362 { FBTYPE_HERCULES, KD_HERCULES }, 363 { FBTYPE_CGA, KD_CGA }, 364 { FBTYPE_EGA, KD_EGA }, 365 { FBTYPE_VGA, KD_VGA }, 366 { FBTYPE_TGA, KD_TGA }, 367 }; 368 int i; 369 370 for (i = 0; i < nitems(types); ++i) { 371 if (types[i].va_type == adp_type) 372 return types[i].fb_type; 373 } 374 return -1; 375 } 376 377 int 378 fb_commonioctl(video_adapter_t *adp, u_long cmd, caddr_t arg) 379 { 380 int error; 381 int s; 382 383 /* assert(adp != NULL) */ 384 385 error = 0; 386 s = spltty(); 387 388 switch (cmd) { 389 390 case FBIO_ADAPTER: /* get video adapter index */ 391 *(int *)arg = adp->va_index; 392 break; 393 394 case FBIO_ADPTYPE: /* get video adapter type */ 395 *(int *)arg = adp->va_type; 396 break; 397 398 case FBIO_ADPINFO: /* get video adapter info */ 399 ((video_adapter_info_t *)arg)->va_index = adp->va_index; 400 ((video_adapter_info_t *)arg)->va_type = adp->va_type; 401 bcopy(adp->va_name, ((video_adapter_info_t *)arg)->va_name, 402 imin(strlen(adp->va_name) + 1, 403 sizeof(((video_adapter_info_t *)arg)->va_name))); 404 ((video_adapter_info_t *)arg)->va_unit = adp->va_unit; 405 ((video_adapter_info_t *)arg)->va_flags = adp->va_flags; 406 ((video_adapter_info_t *)arg)->va_io_base = adp->va_io_base; 407 ((video_adapter_info_t *)arg)->va_io_size = adp->va_io_size; 408 ((video_adapter_info_t *)arg)->va_crtc_addr = adp->va_crtc_addr; 409 ((video_adapter_info_t *)arg)->va_mem_base = adp->va_mem_base; 410 ((video_adapter_info_t *)arg)->va_mem_size = adp->va_mem_size; 411 ((video_adapter_info_t *)arg)->va_window 412 #if defined(__amd64__) || defined(__i386__) 413 = vtophys(adp->va_window); 414 #else 415 = adp->va_window; 416 #endif 417 ((video_adapter_info_t *)arg)->va_window_size 418 = adp->va_window_size; 419 ((video_adapter_info_t *)arg)->va_window_gran 420 = adp->va_window_gran; 421 ((video_adapter_info_t *)arg)->va_window_orig 422 = adp->va_window_orig; 423 ((video_adapter_info_t *)arg)->va_unused0 424 #if defined(__amd64__) || defined(__i386__) 425 = adp->va_buffer != 0 ? vtophys(adp->va_buffer) : 0; 426 #else 427 = adp->va_buffer; 428 #endif 429 ((video_adapter_info_t *)arg)->va_buffer_size 430 = adp->va_buffer_size; 431 ((video_adapter_info_t *)arg)->va_mode = adp->va_mode; 432 ((video_adapter_info_t *)arg)->va_initial_mode 433 = adp->va_initial_mode; 434 ((video_adapter_info_t *)arg)->va_initial_bios_mode 435 = adp->va_initial_bios_mode; 436 ((video_adapter_info_t *)arg)->va_line_width 437 = adp->va_line_width; 438 ((video_adapter_info_t *)arg)->va_disp_start.x 439 = adp->va_disp_start.x; 440 ((video_adapter_info_t *)arg)->va_disp_start.y 441 = adp->va_disp_start.y; 442 break; 443 444 case FBIO_MODEINFO: /* get mode information */ 445 error = vidd_get_info(adp, 446 ((video_info_t *)arg)->vi_mode, 447 (video_info_t *)arg); 448 if (error) 449 error = ENODEV; 450 break; 451 452 case FBIO_FINDMODE: /* find a matching video mode */ 453 error = vidd_query_mode(adp, (video_info_t *)arg); 454 break; 455 456 case FBIO_GETMODE: /* get video mode */ 457 *(int *)arg = adp->va_mode; 458 break; 459 460 case FBIO_SETMODE: /* set video mode */ 461 error = vidd_set_mode(adp, *(int *)arg); 462 if (error) 463 error = ENODEV; /* EINVAL? */ 464 break; 465 466 case FBIO_GETWINORG: /* get frame buffer window origin */ 467 *(u_int *)arg = adp->va_window_orig; 468 break; 469 470 case FBIO_GETDISPSTART: /* get display start address */ 471 ((video_display_start_t *)arg)->x = adp->va_disp_start.x; 472 ((video_display_start_t *)arg)->y = adp->va_disp_start.y; 473 break; 474 475 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */ 476 *(u_int *)arg = adp->va_line_width; 477 break; 478 479 case FBIO_BLANK: /* blank display */ 480 error = vidd_blank_display(adp, *(int *)arg); 481 break; 482 483 case FBIO_GETPALETTE: /* get color palette */ 484 case FBIO_SETPALETTE: /* set color palette */ 485 /* XXX */ 486 487 case FBIOPUTCMAP: 488 case FBIOGETCMAP: 489 /* XXX */ 490 491 case FBIO_SETWINORG: /* set frame buffer window origin */ 492 case FBIO_SETDISPSTART: /* set display start address */ 493 case FBIO_SETLINEWIDTH: /* set scan line width in pixel */ 494 495 case FBIOGTYPE: 496 497 default: 498 error = ENODEV; 499 break; 500 } 501 502 splx(s); 503 return error; 504 }
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