genfb.c revision 1.27
1 /* $NetBSD: genfb.c,v 1.27 2009/08/20 02:51:27 macallan Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.27 2009/08/20 02:51:27 macallan Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/proc.h> 37 #include <sys/mutex.h> 38 #include <sys/ioctl.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/kmem.h> 42 43 #include <dev/wscons/wsconsio.h> 44 #include <dev/wscons/wsdisplayvar.h> 45 #include <dev/rasops/rasops.h> 46 #include <dev/wsfont/wsfont.h> 47 48 #include <dev/wscons/wsdisplay_vconsvar.h> 49 50 #include <dev/wsfb/genfbvar.h> 51 52 #include "opt_genfb.h" 53 #include "opt_wsfb.h" 54 55 #ifdef GENFB_DEBUG 56 #define GPRINTF panic 57 #else 58 #define GPRINTF aprint_verbose 59 #endif 60 61 static int genfb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 62 static paddr_t genfb_mmap(void *, void *, off_t, int); 63 static void genfb_init_screen(void *, struct vcons_screen *, int, long *); 64 65 static int genfb_putcmap(struct genfb_softc *, struct wsdisplay_cmap *); 66 static int genfb_getcmap(struct genfb_softc *, struct wsdisplay_cmap *); 67 static void genfb_restore_palette(struct genfb_softc *); 68 static int genfb_putpalreg(struct genfb_softc *, uint8_t, uint8_t, 69 uint8_t, uint8_t); 70 71 extern const u_char rasops_cmap[768]; 72 73 static int genfb_cnattach_called = 0; 74 static int genfb_enabled = 1; 75 76 struct wsdisplay_accessops genfb_accessops = { 77 genfb_ioctl, 78 genfb_mmap, 79 NULL, /* alloc_screen */ 80 NULL, /* free_screen */ 81 NULL, /* show_screen */ 82 NULL, /* load_font */ 83 NULL, /* pollc */ 84 NULL /* scroll */ 85 }; 86 87 static struct genfb_softc *genfb_softc = NULL; 88 89 void 90 genfb_init(struct genfb_softc *sc) 91 { 92 prop_dictionary_t dict; 93 uint64_t cmap_cb; 94 uint32_t fboffset; 95 96 dict = device_properties(&sc->sc_dev); 97 #ifdef GENFB_DEBUG 98 printf(prop_dictionary_externalize(dict)); 99 #endif 100 if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) { 101 GPRINTF("no width property\n"); 102 return; 103 } 104 if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) { 105 GPRINTF("no height property\n"); 106 return; 107 } 108 if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) { 109 GPRINTF("no depth property\n"); 110 return; 111 } 112 113 /* XXX should be a 64bit value */ 114 if (!prop_dictionary_get_uint32(dict, "address", &fboffset)) { 115 GPRINTF("no address property\n"); 116 return; 117 } 118 119 sc->sc_fboffset = fboffset; 120 121 if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) 122 sc->sc_stride = (sc->sc_width * sc->sc_depth) >> 3; 123 124 /* 125 * deal with a bug in the Raptor firmware which always sets 126 * stride = width even when depth != 8 127 */ 128 if (sc->sc_stride < sc->sc_width * (sc->sc_depth >> 3)) 129 sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3); 130 131 sc->sc_fbsize = sc->sc_height * sc->sc_stride; 132 133 /* optional colour map callback */ 134 sc->sc_cmcb = NULL; 135 if (prop_dictionary_get_uint64(dict, "cmap_callback", &cmap_cb)) { 136 if (cmap_cb != 0) 137 sc->sc_cmcb = (void *)(vaddr_t)cmap_cb; 138 } 139 } 140 141 int 142 genfb_attach(struct genfb_softc *sc, struct genfb_ops *ops) 143 { 144 struct wsemuldisplaydev_attach_args aa; 145 prop_dictionary_t dict; 146 struct rasops_info *ri; 147 uint16_t crow; 148 long defattr; 149 int i, j; 150 bool console; 151 152 dict = device_properties(&sc->sc_dev); 153 prop_dictionary_get_bool(dict, "is_console", &console); 154 155 if (prop_dictionary_get_uint16(dict, "cursor-row", &crow) == false) 156 crow = 0; 157 if (prop_dictionary_get_bool(dict, "clear-screen", &sc->sc_want_clear) 158 == false) 159 sc->sc_want_clear = true; 160 161 /* do not attach when we're not console */ 162 if (!console) { 163 aprint_normal_dev(&sc->sc_dev, "no console, unable to continue\n"); 164 return -1; 165 } 166 167 aprint_verbose_dev(&sc->sc_dev, "framebuffer at %p, size %dx%d, depth %d, " 168 "stride %d\n", 169 sc->sc_fboffset ? (void *)(intptr_t)sc->sc_fboffset : sc->sc_fbaddr, 170 sc->sc_width, sc->sc_height, sc->sc_depth, sc->sc_stride); 171 172 sc->sc_defaultscreen_descr = (struct wsscreen_descr){ 173 "default", 174 0, 0, 175 NULL, 176 8, 16, 177 WSSCREEN_WSCOLORS | WSSCREEN_HILIT, 178 NULL 179 }; 180 sc->sc_screens[0] = &sc->sc_defaultscreen_descr; 181 sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens}; 182 memcpy(&sc->sc_ops, ops, sizeof(struct genfb_ops)); 183 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 184 185 sc->sc_shadowfb = kmem_alloc(sc->sc_fbsize, KM_SLEEP); 186 if (sc->sc_want_clear == false && sc->sc_shadowfb != NULL) 187 memcpy(sc->sc_shadowfb, sc->sc_fbaddr, sc->sc_fbsize); 188 189 vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, 190 &genfb_accessops); 191 sc->vd.init_screen = genfb_init_screen; 192 193 /* Do not print anything between this point and the screen 194 * clear operation below. Otherwise it will be lost. */ 195 196 ri = &sc->sc_console_screen.scr_ri; 197 198 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1, 199 &defattr); 200 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 201 202 sc->sc_defaultscreen_descr.textops = &ri->ri_ops; 203 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps; 204 sc->sc_defaultscreen_descr.nrows = ri->ri_rows; 205 sc->sc_defaultscreen_descr.ncols = ri->ri_cols; 206 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, crow, 207 defattr); 208 209 /* Clear the whole screen to bring it to a known state. */ 210 if (sc->sc_want_clear) 211 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, defattr); 212 213 j = 0; 214 for (i = 0; i < min(1 << sc->sc_depth, 256); i++) { 215 216 sc->sc_cmap_red[i] = rasops_cmap[j]; 217 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 218 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 219 genfb_putpalreg(sc, i, rasops_cmap[j], rasops_cmap[j + 1], 220 rasops_cmap[j + 2]); 221 j += 3; 222 } 223 224 vcons_replay_msgbuf(&sc->sc_console_screen); 225 226 if (genfb_softc == NULL) 227 genfb_softc = sc; 228 229 aa.console = console; 230 aa.scrdata = &sc->sc_screenlist; 231 aa.accessops = &genfb_accessops; 232 aa.accesscookie = &sc->vd; 233 234 config_found(&sc->sc_dev, &aa, wsemuldisplaydevprint); 235 236 return 0; 237 } 238 239 static int 240 genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 241 struct lwp *l) 242 { 243 struct vcons_data *vd = v; 244 struct genfb_softc *sc = vd->cookie; 245 struct wsdisplay_fbinfo *wdf; 246 struct vcons_screen *ms = vd->active; 247 int new_mode, error; 248 249 switch (cmd) { 250 case WSDISPLAYIO_GINFO: 251 if (ms == NULL) 252 return ENODEV; 253 wdf = (void *)data; 254 wdf->height = ms->scr_ri.ri_height; 255 wdf->width = ms->scr_ri.ri_width; 256 wdf->depth = ms->scr_ri.ri_depth; 257 wdf->cmsize = 256; 258 return 0; 259 260 case WSDISPLAYIO_GETCMAP: 261 return genfb_getcmap(sc, 262 (struct wsdisplay_cmap *)data); 263 264 case WSDISPLAYIO_PUTCMAP: 265 return genfb_putcmap(sc, 266 (struct wsdisplay_cmap *)data); 267 268 case WSDISPLAYIO_LINEBYTES: 269 *(u_int *)data = sc->sc_stride; 270 return 0; 271 272 case WSDISPLAYIO_SMODE: 273 new_mode = *(int *)data; 274 275 /* notify the bus backend */ 276 error = 0; 277 if (sc->sc_ops.genfb_ioctl) 278 error = sc->sc_ops.genfb_ioctl(sc, vs, 279 cmd, data, flag, l); 280 if (error) 281 return error; 282 283 if (new_mode != sc->sc_mode) { 284 sc->sc_mode = new_mode; 285 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 286 genfb_restore_palette(sc); 287 vcons_redraw_screen(ms); 288 } 289 } 290 return 0; 291 default: 292 if (sc->sc_ops.genfb_ioctl) 293 return sc->sc_ops.genfb_ioctl(sc, vs, cmd, 294 data, flag, l); 295 } 296 return EPASSTHROUGH; 297 } 298 299 static paddr_t 300 genfb_mmap(void *v, void *vs, off_t offset, int prot) 301 { 302 struct vcons_data *vd = v; 303 struct genfb_softc *sc = vd->cookie; 304 305 if (sc->sc_ops.genfb_mmap) 306 return sc->sc_ops.genfb_mmap(sc, vs, offset, prot); 307 308 return -1; 309 } 310 311 static void 312 genfb_init_screen(void *cookie, struct vcons_screen *scr, 313 int existing, long *defattr) 314 { 315 struct genfb_softc *sc = cookie; 316 struct rasops_info *ri = &scr->scr_ri; 317 318 ri->ri_depth = sc->sc_depth; 319 ri->ri_width = sc->sc_width; 320 ri->ri_height = sc->sc_height; 321 ri->ri_stride = sc->sc_stride; 322 ri->ri_flg = RI_CENTER; 323 if (sc->sc_want_clear) 324 ri->ri_flg |= RI_FULLCLEAR; 325 326 if (sc->sc_shadowfb != NULL) { 327 328 ri->ri_hwbits = (char *)sc->sc_fbaddr; 329 ri->ri_bits = (char *)sc->sc_shadowfb; 330 } else 331 ri->ri_bits = (char *)sc->sc_fbaddr; 332 333 if (existing && sc->sc_want_clear) { 334 ri->ri_flg |= RI_CLEAR; 335 } 336 337 rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8); 338 ri->ri_caps = WSSCREEN_WSCOLORS; 339 340 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 341 sc->sc_width / ri->ri_font->fontwidth); 342 343 /* TODO: actually center output */ 344 ri->ri_hw = scr; 345 } 346 347 static int 348 genfb_putcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 349 { 350 u_char *r, *g, *b; 351 u_int index = cm->index; 352 u_int count = cm->count; 353 int i, error; 354 u_char rbuf[256], gbuf[256], bbuf[256]; 355 356 #ifdef GENFB_DEBUG 357 aprint_debug("putcmap: %d %d\n",index, count); 358 #endif 359 if (cm->index >= 256 || cm->count > 256 || 360 (cm->index + cm->count) > 256) 361 return EINVAL; 362 error = copyin(cm->red, &rbuf[index], count); 363 if (error) 364 return error; 365 error = copyin(cm->green, &gbuf[index], count); 366 if (error) 367 return error; 368 error = copyin(cm->blue, &bbuf[index], count); 369 if (error) 370 return error; 371 372 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 373 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 374 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 375 376 r = &sc->sc_cmap_red[index]; 377 g = &sc->sc_cmap_green[index]; 378 b = &sc->sc_cmap_blue[index]; 379 380 for (i = 0; i < count; i++) { 381 genfb_putpalreg(sc, index, *r, *g, *b); 382 index++; 383 r++, g++, b++; 384 } 385 return 0; 386 } 387 388 static int 389 genfb_getcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 390 { 391 u_int index = cm->index; 392 u_int count = cm->count; 393 int error; 394 395 if (index >= 255 || count > 256 || index + count > 256) 396 return EINVAL; 397 398 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 399 if (error) 400 return error; 401 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 402 if (error) 403 return error; 404 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 405 if (error) 406 return error; 407 408 return 0; 409 } 410 411 static void 412 genfb_restore_palette(struct genfb_softc *sc) 413 { 414 int i; 415 416 if (sc->sc_depth <= 8) { 417 for (i = 0; i < (1 << sc->sc_depth); i++) { 418 genfb_putpalreg(sc, i, sc->sc_cmap_red[i], 419 sc->sc_cmap_green[i], sc->sc_cmap_blue[i]); 420 } 421 } 422 } 423 424 static int 425 genfb_putpalreg(struct genfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g, 426 uint8_t b) 427 { 428 429 if (sc->sc_cmcb) { 430 431 sc->sc_cmcb->gcc_set_mapreg(sc->sc_cmcb->gcc_cookie, 432 idx, r, g, b); 433 } 434 return 0; 435 } 436 437 void 438 genfb_cnattach(void) 439 { 440 genfb_cnattach_called = 1; 441 } 442 443 void 444 genfb_disable(void) 445 { 446 genfb_enabled = 0; 447 } 448 449 int 450 genfb_is_console(void) 451 { 452 return genfb_cnattach_called; 453 } 454 455 int 456 genfb_is_enabled(void) 457 { 458 return genfb_enabled; 459 } 460 461 int 462 genfb_borrow(bus_addr_t addr, bus_space_handle_t *hdlp) 463 { 464 struct genfb_softc *sc = genfb_softc; 465 466 if (sc && sc->sc_ops.genfb_borrow) 467 return sc->sc_ops.genfb_borrow(sc, addr, hdlp); 468 return 0; 469 } 470
Indexes created Tue Sep 23 02:09:52 GMT 2025