1 /* $NetBSD: view.c,v 1.33 2015/11/12 12:19:49 phx Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 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. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christian E. Hopps. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* The view major device is a placeholder device. It serves 34 * simply to map the semantics of a graphics dipslay to 35 * the semantics of a character block device. In other 36 * words the graphics system as currently built does not like to be 37 * refered to by open/close/ioctl. This device serves as 38 * a interface to graphics. */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: view.c,v 1.33 2015/11/12 12:19:49 phx Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/ioctl.h> 47 #include <sys/file.h> 48 #include <sys/device.h> 49 #include <sys/malloc.h> 50 #include <sys/queue.h> 51 #include <sys/conf.h> 52 #include <machine/cpu.h> 53 #include <amiga/dev/grfabs_reg.h> 54 #include <amiga/dev/viewioctl.h> 55 #include <amiga/dev/viewvar.h> 56 57 #include "view.h" 58 #include "ioconf.h" 59 60 static void view_display(struct view_softc *); 61 static void view_remove(struct view_softc *); 62 static int view_setsize(struct view_softc *, struct view_size *); 63 64 int view_get_colormap(struct view_softc *, colormap_t *); 65 int view_set_colormap(struct view_softc *, colormap_t *); 66 67 struct view_softc views[NVIEW]; 68 int view_inited; /* also checked in ite_cc.c */ 69 70 int view_default_x; 71 int view_default_y; 72 int view_default_width = 640; 73 int view_default_height = 400; 74 int view_default_depth = 2; 75 76 dev_type_open(viewopen); 77 dev_type_close(viewclose); 78 dev_type_ioctl(viewioctl); 79 dev_type_mmap(viewmmap); 80 81 const struct cdevsw view_cdevsw = { 82 .d_open = viewopen, 83 .d_close = viewclose, 84 .d_read = nullread, 85 .d_write = nullwrite, 86 .d_ioctl = viewioctl, 87 .d_stop = nostop, 88 .d_tty = notty, 89 .d_poll = nopoll, 90 .d_mmap = viewmmap, 91 .d_kqfilter = nokqfilter, 92 .d_discard = nodiscard, 93 .d_flag = 0 94 }; 95 96 /* 97 * functions for probeing. 98 */ 99 100 void 101 viewattach(int cnt) 102 { 103 viewprobe(); 104 printf("%d view%s configured\n", NVIEW, NVIEW > 1 ? "s" : ""); 105 } 106 107 /* this function is called early to set up a display. */ 108 void 109 viewprobe(void) 110 { 111 int i; 112 113 if (view_inited) 114 return; 115 116 view_inited = 1; 117 118 for (i=0; i<NVIEW; i++) { 119 views[i].view = NULL; 120 views[i].flags = 0; 121 } 122 return; 123 } 124 125 126 /* 127 * Internal functions. 128 */ 129 130 static void 131 view_display(struct view_softc *vu) 132 { 133 int s, i; 134 135 if (vu == NULL) 136 return; 137 138 s = spltty (); 139 140 /* 141 * mark views that share this monitor as not displaying 142 */ 143 for (i=0; i<NVIEW; i++) { 144 if ((views[i].flags & VUF_DISPLAY) && 145 views[i].monitor == vu->monitor) 146 views[i].flags &= ~VUF_DISPLAY; 147 } 148 149 vu->flags |= VUF_ADDED; 150 if (vu->view) { 151 vu->view->display.x = vu->size.x; 152 vu->view->display.y = vu->size.y; 153 154 grf_display_view(vu->view); 155 156 vu->size.x = vu->view->display.x; 157 vu->size.y = vu->view->display.y; 158 vu->flags |= VUF_DISPLAY; 159 } 160 splx(s); 161 } 162 163 /* 164 * remove a view from our added list if it is marked as displaying 165 * switch to a new display. 166 */ 167 static void 168 view_remove(struct view_softc *vu) 169 { 170 int i; 171 172 if ((vu->flags & VUF_ADDED) == 0) 173 return; 174 175 vu->flags &= ~VUF_ADDED; 176 if (vu->flags & VUF_DISPLAY) { 177 for (i = 0; i < NVIEW; i++) { 178 if ((views[i].flags & VUF_ADDED) && &views[i] != vu && 179 views[i].monitor == vu->monitor) { 180 view_display(&views[i]); 181 break; 182 } 183 } 184 } 185 vu->flags &= ~VUF_DISPLAY; 186 grf_remove_view(vu->view); 187 } 188 189 static int 190 view_setsize(struct view_softc *vu, struct view_size *vs) 191 { 192 view_t *new, *old; 193 dimen_t ns; 194 int co, cs; 195 196 co = 0; 197 cs = 0; 198 if (vs->x != vu->size.x || vs->y != vu->size.y) 199 co = 1; 200 201 if (vs->width != vu->size.width || vs->height != vu->size.height || 202 vs->depth != vu->size.depth) 203 cs = 1; 204 205 if (cs == 0 && co == 0) 206 return(0); 207 208 ns.width = vs->width; 209 ns.height = vs->height; 210 211 new = grf_alloc_view(NULL, &ns, vs->depth); 212 if (new == NULL) 213 return(ENOMEM); 214 215 old = vu->view; 216 vu->view = new; 217 vu->size.x = new->display.x; 218 vu->size.y = new->display.y; 219 vu->size.width = new->display.width; 220 vu->size.height = new->display.height; 221 vu->size.depth = new->bitmap->depth; 222 vu->mode = grf_get_display_mode(vu->view); 223 vu->monitor = grf_get_monitor(vu->mode); 224 vu->size.x = vs->x; 225 vu->size.y = vs->y; 226 227 /* 228 * we need a custom remove here to avoid letting 229 * another view display mark as not added or displayed 230 */ 231 if (vu->flags & VUF_DISPLAY) { 232 vu->flags &= ~(VUF_ADDED|VUF_DISPLAY); 233 view_display(vu); 234 } 235 grf_free_view(old); 236 return(0); 237 } 238 239 /* 240 * functions made available by conf.c 241 */ 242 243 /*ARGSUSED*/ 244 int 245 viewopen(dev_t dev, int flags, int mode, struct lwp *l) 246 { 247 dimen_t size; 248 struct view_softc *vu; 249 250 vu = &views[minor(dev)]; 251 252 if (minor(dev) >= NVIEW) 253 return(EXDEV); 254 255 if (vu->flags & VUF_OPEN) 256 return(EBUSY); 257 258 vu->size.x = view_default_x; 259 vu->size.y = view_default_y; 260 size.width = vu->size.width = view_default_width; 261 size.height = vu->size.height = view_default_height; 262 vu->size.depth = view_default_depth; 263 264 vu->view = grf_alloc_view(NULL, &size, vu->size.depth); 265 if (vu->view == NULL) 266 return(ENOMEM); 267 268 vu->size.x = vu->view->display.x; 269 vu->size.y = vu->view->display.y; 270 vu->size.width = vu->view->display.width; 271 vu->size.height = vu->view->display.height; 272 vu->size.depth = vu->view->bitmap->depth; 273 vu->flags |= VUF_OPEN; 274 vu->mode = grf_get_display_mode(vu->view); 275 vu->monitor = grf_get_monitor(vu->mode); 276 return(0); 277 } 278 279 /*ARGSUSED*/ 280 int 281 viewclose(dev_t dev, int flags, int mode, struct lwp *l) 282 { 283 struct view_softc *vu; 284 285 vu = &views[minor(dev)]; 286 287 if ((vu->flags & VUF_OPEN) == 0) 288 return(0); 289 view_remove (vu); 290 grf_free_view (vu->view); 291 vu->flags = 0; 292 vu->view = NULL; 293 vu->mode = NULL; 294 vu->monitor = NULL; 295 return(0); 296 } 297 298 299 /*ARGSUSED*/ 300 int 301 viewioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 302 { 303 struct view_softc *vu; 304 bmap_t *bm; 305 int error; 306 307 vu = &views[minor(dev)]; 308 error = 0; 309 310 switch (cmd) { 311 case VIOCDISPLAY: 312 view_display(vu); 313 break; 314 case VIOCREMOVE: 315 view_remove(vu); 316 break; 317 case VIOCGSIZE: 318 memcpy(data, &vu->size, sizeof (struct view_size)); 319 break; 320 case VIOCSSIZE: 321 error = view_setsize(vu, (struct view_size *)data); 322 break; 323 case VIOCGBMAP: 324 bm = (bmap_t *)data; 325 memcpy(bm, vu->view->bitmap, sizeof(bmap_t)); 326 if (flag != -1) { 327 bm->plane = 0; 328 bm->blit_temp = 0; 329 bm->hardware_address = 0; 330 } 331 break; 332 case VIOCGCMAP: 333 error = view_get_colormap(vu, (colormap_t *)data); 334 break; 335 case VIOCSCMAP: 336 error = view_set_colormap(vu, (colormap_t *)data); 337 break; 338 default: 339 error = EPASSTHROUGH; 340 break; 341 } 342 return(error); 343 } 344 345 int 346 view_get_colormap(struct view_softc *vu, colormap_t *ucm) 347 { 348 int error; 349 u_long *cme; 350 u_long *uep; 351 352 /* add one incase of zero, ick. */ 353 if (ucm->size + 1 > SIZE_T_MAX / sizeof(u_long)) 354 return EINVAL; 355 cme = malloc(sizeof (u_long)*(ucm->size + 1), M_TEMP, M_WAITOK); 356 if (cme == NULL) 357 return(ENOMEM); 358 359 uep = ucm->entry; 360 error = 0; 361 ucm->entry = cme; /* set entry to out alloc. */ 362 if (vu->view == NULL || grf_get_colormap(vu->view, ucm)) 363 error = EINVAL; 364 else 365 error = copyout(cme, uep, sizeof(u_long) * ucm->size); 366 ucm->entry = uep; /* set entry back to users. */ 367 free(cme, M_TEMP); 368 return(error); 369 } 370 371 int 372 view_set_colormap(struct view_softc *vu, colormap_t *ucm) 373 { 374 colormap_t *cm; 375 int error; 376 377 error = 0; 378 cm = malloc(sizeof(u_long) * ucm->size + sizeof (*cm), M_TEMP, 379 M_WAITOK); 380 if (cm == NULL) 381 return(ENOMEM); 382 383 bcopy (ucm, cm, sizeof(colormap_t)); 384 cm->entry = (u_long *)&cm[1]; /* table directly after. */ 385 if (((error = 386 copyin(ucm->entry, cm->entry, sizeof (u_long) * ucm->size)) == 0) 387 && (vu->view == NULL || grf_use_colormap(vu->view, cm))) 388 error = EINVAL; 389 free(cm, M_TEMP); 390 return(error); 391 } 392 393 /*ARGSUSED*/ 394 paddr_t 395 viewmmap(dev_t dev, off_t off, int prot) 396 { 397 struct view_softc *vu; 398 bmap_t *bm; 399 u_char *bmd_start; 400 u_long bmd_size; 401 402 vu = &views[minor(dev)]; 403 bm = vu->view->bitmap; 404 bmd_start = bm->hardware_address; 405 bmd_size = bm->bytes_per_row*bm->rows*bm->depth; 406 407 if (off >= 0 && off < bmd_size) 408 return MD_BTOP((paddr_t)bmd_start + off); 409 410 return(-1); 411 } 412