genfb.c revision 1.16
1 /* $NetBSD: genfb.c,v 1.16 2008/04/05 15:50:49 cegger 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 * 3. Neither the name of The NetBSD Foundation nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: genfb.c,v 1.16 2008/04/05 15:50:49 cegger Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/mutex.h> 41 #include <sys/ioctl.h> 42 #include <sys/kernel.h> 43 #include <sys/systm.h> 44 #include <sys/malloc.h> 45 46 #include <dev/wscons/wsconsio.h> 47 #include <dev/wscons/wsdisplayvar.h> 48 #include <dev/rasops/rasops.h> 49 #include <dev/wsfont/wsfont.h> 50 51 #include <dev/wscons/wsdisplay_vconsvar.h> 52 53 #include <dev/wsfb/genfbvar.h> 54 55 #include "opt_genfb.h" 56 #include "opt_wsfb.h" 57 58 #ifdef GENFB_DEBUG 59 #define GPRINTF panic 60 #else 61 #define GPRINTF aprint_verbose 62 #endif 63 64 static int genfb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 65 static paddr_t genfb_mmap(void *, void *, off_t, int); 66 static void genfb_init_screen(void *, struct vcons_screen *, int, long *); 67 68 static int genfb_putcmap(struct genfb_softc *, struct wsdisplay_cmap *); 69 static int genfb_getcmap(struct genfb_softc *, struct wsdisplay_cmap *); 70 static void genfb_restore_palette(struct genfb_softc *); 71 static int genfb_putpalreg(struct genfb_softc *, uint8_t, uint8_t, 72 uint8_t, uint8_t); 73 74 extern const u_char rasops_cmap[768]; 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 void 88 genfb_init(struct genfb_softc *sc) 89 { 90 prop_dictionary_t dict; 91 uint64_t cmap_cb; 92 uint32_t fboffset; 93 94 dict = device_properties(&sc->sc_dev); 95 #ifdef GENFB_DEBUG 96 printf(prop_dictionary_externalize(dict)); 97 #endif 98 if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) { 99 GPRINTF("no width property\n"); 100 return; 101 } 102 if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) { 103 GPRINTF("no height property\n"); 104 return; 105 } 106 if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) { 107 GPRINTF("no depth property\n"); 108 return; 109 } 110 111 /* XXX should be a 64bit value */ 112 if (!prop_dictionary_get_uint32(dict, "address", &fboffset)) { 113 GPRINTF("no address property\n"); 114 return; 115 } 116 117 sc->sc_fboffset = fboffset; 118 119 if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) 120 sc->sc_stride = (sc->sc_width * sc->sc_depth) >> 3; 121 122 /* 123 * deal with a bug in the Raptor firmware which always sets 124 * stride = width even when depth != 8 125 */ 126 if (sc->sc_stride < sc->sc_width * (sc->sc_depth >> 3)) 127 sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3); 128 129 sc->sc_fbsize = sc->sc_height * sc->sc_stride; 130 131 /* optional colour map callback */ 132 sc->sc_cmcb = NULL; 133 if (prop_dictionary_get_uint64(dict, "cmap_callback", &cmap_cb)) { 134 if (cmap_cb != 0) 135 sc->sc_cmcb = (void *)(vaddr_t)cmap_cb; 136 } 137 } 138 139 int 140 genfb_attach(struct genfb_softc *sc, struct genfb_ops *ops) 141 { 142 struct wsemuldisplaydev_attach_args aa; 143 prop_dictionary_t dict; 144 struct rasops_info *ri; 145 long defattr; 146 int i, j; 147 bool console; 148 149 dict = device_properties(&sc->sc_dev); 150 prop_dictionary_get_bool(dict, "is_console", &console); 151 152 /* do not attach when we're not console */ 153 if (!console) { 154 aprint_normal_dev(&sc->sc_dev, "no console, unable to continue\n"); 155 return -1; 156 } 157 158 aprint_verbose_dev(&sc->sc_dev, "framebuffer at %p, size %dx%d, depth %d, " 159 "stride %d\n", sc->sc_fbaddr, 160 sc->sc_width, sc->sc_height, sc->sc_depth, sc->sc_stride); 161 162 sc->sc_defaultscreen_descr = (struct wsscreen_descr){ 163 "default", 164 0, 0, 165 NULL, 166 8, 16, 167 WSSCREEN_WSCOLORS | WSSCREEN_HILIT, 168 NULL 169 }; 170 sc->sc_screens[0] = &sc->sc_defaultscreen_descr; 171 sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens}; 172 memcpy(&sc->sc_ops, ops, sizeof(struct genfb_ops)); 173 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 174 175 sc->sc_shadowfb = malloc(sc->sc_fbsize, M_DEVBUF, M_WAITOK); 176 177 vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, 178 &genfb_accessops); 179 sc->vd.init_screen = genfb_init_screen; 180 181 /* Do not print anything between this point and the screen 182 * clear operation below. Otherwise it will be lost. */ 183 184 ri = &sc->sc_console_screen.scr_ri; 185 186 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1, 187 &defattr); 188 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 189 190 sc->sc_defaultscreen_descr.textops = &ri->ri_ops; 191 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps; 192 sc->sc_defaultscreen_descr.nrows = ri->ri_rows; 193 sc->sc_defaultscreen_descr.ncols = ri->ri_cols; 194 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0, 195 defattr); 196 197 /* Clear the whole screen to bring it to a known state. */ 198 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, defattr); 199 200 j = 0; 201 for (i = 0; i < (1 << sc->sc_depth); i++) { 202 203 sc->sc_cmap_red[i] = rasops_cmap[j]; 204 sc->sc_cmap_green[i] = rasops_cmap[j + 1]; 205 sc->sc_cmap_blue[i] = rasops_cmap[j + 2]; 206 genfb_putpalreg(sc, i, rasops_cmap[j], rasops_cmap[j + 1], 207 rasops_cmap[j + 2]); 208 j += 3; 209 } 210 211 aa.console = console; 212 aa.scrdata = &sc->sc_screenlist; 213 aa.accessops = &genfb_accessops; 214 aa.accesscookie = &sc->vd; 215 216 config_found(&sc->sc_dev, &aa, wsemuldisplaydevprint); 217 218 return 0; 219 } 220 221 static int 222 genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 223 struct lwp *l) 224 { 225 struct vcons_data *vd = v; 226 struct genfb_softc *sc = vd->cookie; 227 struct wsdisplay_fbinfo *wdf; 228 struct vcons_screen *ms = vd->active; 229 230 switch (cmd) { 231 232 case WSDISPLAYIO_GINFO: 233 if (ms == NULL) 234 return ENODEV; 235 wdf = (void *)data; 236 wdf->height = ms->scr_ri.ri_height; 237 wdf->width = ms->scr_ri.ri_width; 238 wdf->depth = ms->scr_ri.ri_depth; 239 wdf->cmsize = 256; 240 return 0; 241 242 case WSDISPLAYIO_GETCMAP: 243 return genfb_getcmap(sc, 244 (struct wsdisplay_cmap *)data); 245 246 case WSDISPLAYIO_PUTCMAP: 247 return genfb_putcmap(sc, 248 (struct wsdisplay_cmap *)data); 249 250 case WSDISPLAYIO_LINEBYTES: 251 *(u_int *)data = sc->sc_stride; 252 return 0; 253 254 case WSDISPLAYIO_SMODE: 255 { 256 int new_mode = *(int*)data; 257 258 /* notify the bus backend */ 259 if (sc->sc_ops.genfb_ioctl) 260 return sc->sc_ops.genfb_ioctl(sc, vs, 261 cmd, data, flag, l); 262 263 if (new_mode != sc->sc_mode) { 264 sc->sc_mode = new_mode; 265 if(new_mode == WSDISPLAYIO_MODE_EMUL) { 266 genfb_restore_palette(sc); 267 vcons_redraw_screen(ms); 268 } 269 } 270 } 271 return 0; 272 default: 273 if (sc->sc_ops.genfb_ioctl) 274 return sc->sc_ops.genfb_ioctl(sc, vs, cmd, 275 data, flag, l); 276 } 277 return EPASSTHROUGH; 278 } 279 280 static paddr_t 281 genfb_mmap(void *v, void *vs, off_t offset, int prot) 282 { 283 struct vcons_data *vd = v; 284 struct genfb_softc *sc = vd->cookie; 285 286 if (sc->sc_ops.genfb_mmap) 287 return sc->sc_ops.genfb_mmap(sc, vs, offset, prot); 288 289 return -1; 290 } 291 292 static void 293 genfb_init_screen(void *cookie, struct vcons_screen *scr, 294 int existing, long *defattr) 295 { 296 struct genfb_softc *sc = cookie; 297 struct rasops_info *ri = &scr->scr_ri; 298 299 ri->ri_depth = sc->sc_depth; 300 ri->ri_width = sc->sc_width; 301 ri->ri_height = sc->sc_height; 302 ri->ri_stride = sc->sc_stride; 303 ri->ri_flg = RI_CENTER | RI_FULLCLEAR; 304 305 if (sc->sc_shadowfb != NULL) { 306 307 ri->ri_hwbits = (char *)sc->sc_fbaddr; 308 ri->ri_bits = (char *)sc->sc_shadowfb; 309 } else 310 ri->ri_bits = (char *)sc->sc_fbaddr; 311 312 if (existing) { 313 ri->ri_flg |= RI_CLEAR; 314 } 315 316 rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8); 317 ri->ri_caps = WSSCREEN_WSCOLORS; 318 319 rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight, 320 sc->sc_width / ri->ri_font->fontwidth); 321 322 ri->ri_hw = scr; 323 } 324 325 static int 326 genfb_putcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 327 { 328 u_char *r, *g, *b; 329 u_int index = cm->index; 330 u_int count = cm->count; 331 int i, error; 332 u_char rbuf[256], gbuf[256], bbuf[256]; 333 334 #ifdef GENFB_DEBUG 335 aprint_debug("putcmap: %d %d\n",index, count); 336 #endif 337 if (cm->index >= 256 || cm->count > 256 || 338 (cm->index + cm->count) > 256) 339 return EINVAL; 340 error = copyin(cm->red, &rbuf[index], count); 341 if (error) 342 return error; 343 error = copyin(cm->green, &gbuf[index], count); 344 if (error) 345 return error; 346 error = copyin(cm->blue, &bbuf[index], count); 347 if (error) 348 return error; 349 350 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 351 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 352 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 353 354 r = &sc->sc_cmap_red[index]; 355 g = &sc->sc_cmap_green[index]; 356 b = &sc->sc_cmap_blue[index]; 357 358 for (i = 0; i < count; i++) { 359 genfb_putpalreg(sc, index, *r, *g, *b); 360 index++; 361 r++, g++, b++; 362 } 363 return 0; 364 } 365 366 static int 367 genfb_getcmap(struct genfb_softc *sc, struct wsdisplay_cmap *cm) 368 { 369 u_int index = cm->index; 370 u_int count = cm->count; 371 int error; 372 373 if (index >= 255 || count > 256 || index + count > 256) 374 return EINVAL; 375 376 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 377 if (error) 378 return error; 379 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 380 if (error) 381 return error; 382 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 383 if (error) 384 return error; 385 386 return 0; 387 } 388 389 static void 390 genfb_restore_palette(struct genfb_softc *sc) 391 { 392 int i; 393 394 for (i = 0; i < (1 << sc->sc_depth); i++) { 395 genfb_putpalreg(sc, i, sc->sc_cmap_red[i], 396 sc->sc_cmap_green[i], sc->sc_cmap_blue[i]); 397 } 398 } 399 400 static int 401 genfb_putpalreg(struct genfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g, 402 uint8_t b) 403 { 404 405 if (sc->sc_cmcb) { 406 407 sc->sc_cmcb->gcc_set_mapreg(sc->sc_cmcb->gcc_cookie, 408 idx, r, g, b); 409 } 410 return 0; 411 } 412 413
Indexes created Mon Sep 22 13:09:51 GMT 2025