1 /*- 2 * Copyright (c) 2011 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/systm.h> 33 #include <sys/fbio.h> 34 35 #include <dev/vt/vt.h> 36 #include <dev/vt/hw/fb/vt_fb.h> 37 #include <dev/vt/colors/vt_termcolors.h> 38 39 #include <vm/vm.h> 40 #include <vm/pmap.h> 41 42 #include <machine/bus.h> 43 #ifdef __sparc64__ 44 #include <machine/bus_private.h> 45 #endif 46 47 #include <dev/ofw/openfirm.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_pci.h> 50 51 struct ofwfb_softc { 52 struct fb_info fb; 53 54 phandle_t sc_node; 55 ihandle_t sc_handle; 56 bus_space_tag_t sc_memt; 57 int iso_palette; 58 }; 59 60 static vd_probe_t ofwfb_probe; 61 static vd_init_t ofwfb_init; 62 static vd_bitblt_text_t ofwfb_bitblt_text; 63 static vd_bitblt_bmp_t ofwfb_bitblt_bitmap; 64 65 static const struct vt_driver vt_ofwfb_driver = { 66 .vd_name = "ofwfb", 67 .vd_probe = ofwfb_probe, 68 .vd_init = ofwfb_init, 69 .vd_blank = vt_fb_blank, 70 .vd_bitblt_text = ofwfb_bitblt_text, 71 .vd_bitblt_bmp = ofwfb_bitblt_bitmap, 72 .vd_fb_ioctl = vt_fb_ioctl, 73 .vd_fb_mmap = vt_fb_mmap, 74 .vd_priority = VD_PRIORITY_GENERIC+1, 75 }; 76 77 static unsigned char ofw_colors[16] = { 78 /* See "16-color Text Extension" Open Firmware document, page 4 */ 79 0, 4, 2, 6, 1, 5, 3, 7, 80 8, 12, 10, 14, 9, 13, 11, 15 81 }; 82 83 static struct ofwfb_softc ofwfb_conssoftc; 84 VT_DRIVER_DECLARE(vt_ofwfb, vt_ofwfb_driver); 85 86 static int 87 ofwfb_probe(struct vt_device *vd) 88 { 89 phandle_t chosen, node; 90 ihandle_t stdout; 91 char type[64]; 92 93 chosen = OF_finddevice("/chosen"); 94 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)); 95 node = OF_instance_to_package(stdout); 96 if (node == -1) { 97 /* 98 * The "/chosen/stdout" does not exist try 99 * using "screen" directly. 100 */ 101 node = OF_finddevice("screen"); 102 } 103 OF_getprop(node, "device_type", type, sizeof(type)); 104 if (strcmp(type, "display") != 0) 105 return (CN_DEAD); 106 107 /* Looks OK... */ 108 return (CN_INTERNAL); 109 } 110 111 static void 112 ofwfb_bitblt_bitmap(struct vt_device *vd, const struct vt_window *vw, 113 const uint8_t *pattern, const uint8_t *mask, 114 unsigned int width, unsigned int height, 115 unsigned int x, unsigned int y, term_color_t fg, term_color_t bg) 116 { 117 struct fb_info *sc = vd->vd_softc; 118 u_long line; 119 uint32_t fgc, bgc; 120 int c, l; 121 uint8_t b, m; 122 union { 123 uint32_t l; 124 uint8_t c[4]; 125 } ch1, ch2; 126 127 fgc = sc->fb_cmap[fg]; 128 bgc = sc->fb_cmap[bg]; 129 b = m = 0; 130 131 if (((struct ofwfb_softc *)vd->vd_softc)->iso_palette) { 132 fg = ofw_colors[fg]; 133 bg = ofw_colors[bg]; 134 } 135 136 line = (sc->fb_stride * y) + x * sc->fb_bpp/8; 137 if (mask == NULL && sc->fb_bpp == 8 && (width % 8 == 0)) { 138 /* Don't try to put off screen pixels */ 139 if (((x + width) > vd->vd_width) || ((y + height) > 140 vd->vd_height)) 141 return; 142 143 for (; height > 0; height--) { 144 for (c = 0; c < width; c += 8) { 145 b = *pattern++; 146 147 /* 148 * Assume that there is more background than 149 * foreground in characters and init accordingly 150 */ 151 ch1.l = ch2.l = (bg << 24) | (bg << 16) | 152 (bg << 8) | bg; 153 154 /* 155 * Calculate 2 x 4-chars at a time, and then 156 * write these out. 157 */ 158 if (b & 0x80) ch1.c[0] = fg; 159 if (b & 0x40) ch1.c[1] = fg; 160 if (b & 0x20) ch1.c[2] = fg; 161 if (b & 0x10) ch1.c[3] = fg; 162 163 if (b & 0x08) ch2.c[0] = fg; 164 if (b & 0x04) ch2.c[1] = fg; 165 if (b & 0x02) ch2.c[2] = fg; 166 if (b & 0x01) ch2.c[3] = fg; 167 168 *(uint32_t *)(sc->fb_vbase + line + c) = ch1.l; 169 *(uint32_t *)(sc->fb_vbase + line + c + 4) = 170 ch2.l; 171 } 172 line += sc->fb_stride; 173 } 174 } else { 175 for (l = 0; 176 l < height && y + l < vw->vw_draw_area.tr_end.tp_row; 177 l++) { 178 for (c = 0; 179 c < width && x + c < vw->vw_draw_area.tr_end.tp_col; 180 c++) { 181 if (c % 8 == 0) 182 b = *pattern++; 183 else 184 b <<= 1; 185 if (mask != NULL) { 186 if (c % 8 == 0) 187 m = *mask++; 188 else 189 m <<= 1; 190 /* Skip pixel write, if mask not set. */ 191 if ((m & 0x80) == 0) 192 continue; 193 } 194 switch(sc->fb_bpp) { 195 case 8: 196 *(uint8_t *)(sc->fb_vbase + line + c) = 197 b & 0x80 ? fg : bg; 198 break; 199 case 32: 200 *(uint32_t *)(sc->fb_vbase + line + 4*c) 201 = (b & 0x80) ? fgc : bgc; 202 break; 203 default: 204 /* panic? */ 205 break; 206 } 207 } 208 line += sc->fb_stride; 209 } 210 } 211 } 212 213 void 214 ofwfb_bitblt_text(struct vt_device *vd, const struct vt_window *vw, 215 const term_rect_t *area) 216 { 217 unsigned int col, row, x, y; 218 struct vt_font *vf; 219 term_char_t c; 220 term_color_t fg, bg; 221 const uint8_t *pattern; 222 223 vf = vw->vw_font; 224 225 for (row = area->tr_begin.tp_row; row < area->tr_end.tp_row; ++row) { 226 for (col = area->tr_begin.tp_col; col < area->tr_end.tp_col; 227 ++col) { 228 x = col * vf->vf_width + 229 vw->vw_draw_area.tr_begin.tp_col; 230 y = row * vf->vf_height + 231 vw->vw_draw_area.tr_begin.tp_row; 232 233 c = VTBUF_GET_FIELD(&vw->vw_buf, row, col); 234 pattern = vtfont_lookup(vf, c); 235 vt_determine_colors(c, 236 VTBUF_ISCURSOR(&vw->vw_buf, row, col), &fg, &bg); 237 238 ofwfb_bitblt_bitmap(vd, vw, 239 pattern, NULL, vf->vf_width, vf->vf_height, 240 x, y, fg, bg); 241 } 242 } 243 244 #ifndef SC_NO_CUTPASTE 245 if (!vd->vd_mshown) 246 return; 247 248 term_rect_t drawn_area; 249 250 drawn_area.tr_begin.tp_col = area->tr_begin.tp_col * vf->vf_width; 251 drawn_area.tr_begin.tp_row = area->tr_begin.tp_row * vf->vf_height; 252 drawn_area.tr_end.tp_col = area->tr_end.tp_col * vf->vf_width; 253 drawn_area.tr_end.tp_row = area->tr_end.tp_row * vf->vf_height; 254 255 if (vt_is_cursor_in_area(vd, &drawn_area)) { 256 ofwfb_bitblt_bitmap(vd, vw, 257 vd->vd_mcursor->map, vd->vd_mcursor->mask, 258 vd->vd_mcursor->width, vd->vd_mcursor->height, 259 vd->vd_mx_drawn + vw->vw_draw_area.tr_begin.tp_col, 260 vd->vd_my_drawn + vw->vw_draw_area.tr_begin.tp_row, 261 vd->vd_mcursor_fg, vd->vd_mcursor_bg); 262 } 263 #endif 264 } 265 266 static void 267 ofwfb_initialize(struct vt_device *vd) 268 { 269 struct ofwfb_softc *sc = vd->vd_softc; 270 int i, err; 271 cell_t retval; 272 uint32_t oldpix; 273 274 /* 275 * Set up the color map 276 */ 277 278 sc->iso_palette = 0; 279 switch (sc->fb.fb_bpp) { 280 case 8: 281 vt_generate_cons_palette(sc->fb.fb_cmap, COLOR_FORMAT_RGB, 255, 282 16, 255, 8, 255, 0); 283 284 for (i = 0; i < 16; i++) { 285 err = OF_call_method("color!", sc->sc_handle, 4, 1, 286 (cell_t)((sc->fb.fb_cmap[i] >> 16) & 0xff), 287 (cell_t)((sc->fb.fb_cmap[i] >> 8) & 0xff), 288 (cell_t)((sc->fb.fb_cmap[i] >> 0) & 0xff), 289 (cell_t)i, &retval); 290 if (err) 291 break; 292 } 293 if (i != 16) 294 sc->iso_palette = 1; 295 296 break; 297 298 case 32: 299 /* 300 * We bypass the usual bus_space_() accessors here, mostly 301 * for performance reasons. In particular, we don't want 302 * any barrier operations that may be performed and handle 303 * endianness slightly different. Figure out the host-view 304 * endianness of the frame buffer. 305 */ 306 oldpix = bus_space_read_4(sc->sc_memt, sc->fb.fb_vbase, 0); 307 bus_space_write_4(sc->sc_memt, sc->fb.fb_vbase, 0, 0xff000000); 308 if (*(uint8_t *)(sc->fb.fb_vbase) == 0xff) 309 vt_generate_cons_palette(sc->fb.fb_cmap, 310 COLOR_FORMAT_RGB, 255, 0, 255, 8, 255, 16); 311 else 312 vt_generate_cons_palette(sc->fb.fb_cmap, 313 COLOR_FORMAT_RGB, 255, 16, 255, 8, 255, 0); 314 bus_space_write_4(sc->sc_memt, sc->fb.fb_vbase, 0, oldpix); 315 break; 316 317 default: 318 panic("Unknown color space depth %d", sc->fb.fb_bpp); 319 break; 320 } 321 322 sc->fb.fb_cmsize = 16; 323 } 324 325 static int 326 ofwfb_init(struct vt_device *vd) 327 { 328 struct ofwfb_softc *sc; 329 char type[64]; 330 phandle_t chosen; 331 phandle_t node; 332 uint32_t depth, height, width, stride; 333 uint32_t fb_phys; 334 int i, len; 335 #ifdef __sparc64__ 336 static struct bus_space_tag ofwfb_memt[1]; 337 bus_addr_t phys; 338 int space; 339 #endif 340 341 /* Initialize softc */ 342 vd->vd_softc = sc = &ofwfb_conssoftc; 343 344 chosen = OF_finddevice("/chosen"); 345 OF_getprop(chosen, "stdout", &sc->sc_handle, sizeof(ihandle_t)); 346 node = OF_instance_to_package(sc->sc_handle); 347 if (node == -1) { 348 /* 349 * The "/chosen/stdout" does not exist try 350 * using "screen" directly. 351 */ 352 node = OF_finddevice("screen"); 353 sc->sc_handle = OF_open("screen"); 354 } 355 OF_getprop(node, "device_type", type, sizeof(type)); 356 if (strcmp(type, "display") != 0) 357 return (CN_DEAD); 358 359 /* Keep track of the OF node */ 360 sc->sc_node = node; 361 362 /* 363 * Try to use a 32-bit framebuffer if possible. This may be 364 * unimplemented and fail. That's fine -- it just means we are 365 * stuck with the defaults. 366 */ 367 OF_call_method("set-depth", sc->sc_handle, 1, 1, (cell_t)32, &i); 368 369 /* Make sure we have needed properties */ 370 if (OF_getproplen(node, "height") != sizeof(height) || 371 OF_getproplen(node, "width") != sizeof(width) || 372 OF_getproplen(node, "depth") != sizeof(depth) || 373 OF_getproplen(node, "linebytes") != sizeof(sc->fb.fb_stride)) 374 return (CN_DEAD); 375 376 /* Only support 8 and 32-bit framebuffers */ 377 OF_getprop(node, "depth", &depth, sizeof(depth)); 378 if (depth != 8 && depth != 32) 379 return (CN_DEAD); 380 sc->fb.fb_bpp = sc->fb.fb_depth = depth; 381 382 OF_getprop(node, "height", &height, sizeof(height)); 383 OF_getprop(node, "width", &width, sizeof(width)); 384 OF_getprop(node, "linebytes", &stride, sizeof(stride)); 385 386 sc->fb.fb_height = height; 387 sc->fb.fb_width = width; 388 sc->fb.fb_stride = stride; 389 sc->fb.fb_size = sc->fb.fb_height * sc->fb.fb_stride; 390 391 /* 392 * Grab the physical address of the framebuffer, and then map it 393 * into our memory space. If the MMU is not yet up, it will be 394 * remapped for us when relocation turns on. 395 */ 396 if (OF_getproplen(node, "address") == sizeof(fb_phys)) { 397 /* XXX We assume #address-cells is 1 at this point. */ 398 OF_getprop(node, "address", &fb_phys, sizeof(fb_phys)); 399 400 #if defined(__powerpc__) 401 sc->sc_memt = &bs_be_tag; 402 bus_space_map(sc->sc_memt, fb_phys, sc->fb.fb_size, 403 BUS_SPACE_MAP_PREFETCHABLE, &sc->fb.fb_vbase); 404 #elif defined(__sparc64__) 405 OF_decode_addr(node, 0, &space, &phys); 406 sc->sc_memt = &ofwfb_memt[0]; 407 sc->fb.fb_vbase = 408 sparc64_fake_bustag(space, fb_phys, sc->sc_memt); 409 #elif defined(__arm__) 410 sc->sc_memt = fdtbus_bs_tag; 411 bus_space_map(sc->sc_memt, sc->fb.fb_pbase, sc->fb.fb_size, 412 BUS_SPACE_MAP_PREFETCHABLE, 413 (bus_space_handle_t *)&sc->fb.fb_vbase); 414 #else 415 #error Unsupported platform! 416 #endif 417 418 sc->fb.fb_pbase = fb_phys; 419 } else { 420 /* 421 * Some IBM systems don't have an address property. Try to 422 * guess the framebuffer region from the assigned addresses. 423 * This is ugly, but there doesn't seem to be an alternative. 424 * Linux does the same thing. 425 */ 426 427 struct ofw_pci_register pciaddrs[8]; 428 int num_pciaddrs = 0; 429 430 /* 431 * Get the PCI addresses of the adapter, if present. The node 432 * may be the child of the PCI device: in that case, try the 433 * parent for the assigned-addresses property. 434 */ 435 len = OF_getprop(node, "assigned-addresses", pciaddrs, 436 sizeof(pciaddrs)); 437 if (len == -1) { 438 len = OF_getprop(OF_parent(node), "assigned-addresses", 439 pciaddrs, sizeof(pciaddrs)); 440 } 441 if (len == -1) 442 len = 0; 443 num_pciaddrs = len / sizeof(struct ofw_pci_register); 444 445 fb_phys = num_pciaddrs; 446 for (i = 0; i < num_pciaddrs; i++) { 447 /* If it is too small, not the framebuffer */ 448 if (pciaddrs[i].size_lo < sc->fb.fb_stride * height) 449 continue; 450 /* If it is not memory, it isn't either */ 451 if (!(pciaddrs[i].phys_hi & 452 OFW_PCI_PHYS_HI_SPACE_MEM32)) 453 continue; 454 455 /* This could be the framebuffer */ 456 fb_phys = i; 457 458 /* If it is prefetchable, it certainly is */ 459 if (pciaddrs[i].phys_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) 460 break; 461 } 462 463 if (fb_phys == num_pciaddrs) /* No candidates found */ 464 return (CN_DEAD); 465 466 #if defined(__powerpc__) 467 OF_decode_addr(node, fb_phys, &sc->sc_memt, &sc->fb.fb_vbase); 468 sc->fb.fb_pbase = sc->fb.fb_vbase; /* 1:1 mapped */ 469 #else 470 /* No ability to interpret assigned-addresses otherwise */ 471 return (CN_DEAD); 472 #endif 473 } 474 475 476 ofwfb_initialize(vd); 477 vt_fb_init(vd); 478 479 return (CN_INTERNAL); 480 } 481 482