1 /* 2 * A framebuffer driver for VBE 2.0+ compliant video cards 3 * 4 * (c) 2007 Michal Januszewski <spock@gentoo.org> 5 * Loosely based upon the vesafb driver. 6 * 7 */ 8 9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 10 11 #include <linux/init.h> 12 #include <linux/module.h> 13 #include <linux/moduleparam.h> 14 #include <linux/skbuff.h> 15 #include <linux/timer.h> 16 #include <linux/completion.h> 17 #include <linux/connector.h> 18 #include <linux/random.h> 19 #include <linux/platform_device.h> 20 #include <linux/limits.h> 21 #include <linux/fb.h> 22 #include <linux/io.h> 23 #include <linux/mutex.h> 24 #include <linux/slab.h> 25 #include <video/edid.h> 26 #include <video/uvesafb.h> 27 #ifdef CONFIG_X86 28 #include <video/vga.h> 29 #endif 30 #include "edid.h" 31 32 static struct cb_id uvesafb_cn_id = { 33 .idx = CN_IDX_V86D, 34 .val = CN_VAL_V86D_UVESAFB 35 }; 36 static char v86d_path[PATH_MAX] = "/sbin/v86d"; 37 static char v86d_started; /* has v86d been started by uvesafb? */ 38 39 static const struct fb_fix_screeninfo uvesafb_fix = { 40 .id = "VESA VGA", 41 .type = FB_TYPE_PACKED_PIXELS, 42 .accel = FB_ACCEL_NONE, 43 .visual = FB_VISUAL_TRUECOLOR, 44 }; 45 46 static int mtrr = 3; /* enable mtrr by default */ 47 static bool blank = 1; /* enable blanking by default */ 48 static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */ 49 static bool pmi_setpal = true; /* use PMI for palette changes */ 50 static bool nocrtc; /* ignore CRTC settings */ 51 static bool noedid; /* don't try DDC transfers */ 52 static int vram_remap; /* set amt. of memory to be used */ 53 static int vram_total; /* set total amount of memory */ 54 static u16 maxclk; /* maximum pixel clock */ 55 static u16 maxvf; /* maximum vertical frequency */ 56 static u16 maxhf; /* maximum horizontal frequency */ 57 static u16 vbemode; /* force use of a specific VBE mode */ 58 static char *mode_option; 59 static u8 dac_width = 6; 60 61 static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX]; 62 static DEFINE_MUTEX(uvfb_lock); 63 64 /* 65 * A handler for replies from userspace. 66 * 67 * Make sure each message passes consistency checks and if it does, 68 * find the kernel part of the task struct, copy the registers and 69 * the buffer contents and then complete the task. 70 */ 71 static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) 72 { 73 struct uvesafb_task *utask; 74 struct uvesafb_ktask *task; 75 76 if (!capable(CAP_SYS_ADMIN)) 77 return; 78 79 if (msg->seq >= UVESAFB_TASKS_MAX) 80 return; 81 82 mutex_lock(&uvfb_lock); 83 task = uvfb_tasks[msg->seq]; 84 85 if (!task || msg->ack != task->ack) { 86 mutex_unlock(&uvfb_lock); 87 return; 88 } 89 90 utask = (struct uvesafb_task *)msg->data; 91 92 /* Sanity checks for the buffer length. */ 93 if (task->t.buf_len < utask->buf_len || 94 utask->buf_len > msg->len - sizeof(*utask)) { 95 mutex_unlock(&uvfb_lock); 96 return; 97 } 98 99 uvfb_tasks[msg->seq] = NULL; 100 mutex_unlock(&uvfb_lock); 101 102 memcpy(&task->t, utask, sizeof(*utask)); 103 104 if (task->t.buf_len && task->buf) 105 memcpy(task->buf, utask + 1, task->t.buf_len); 106 107 complete(task->done); 108 return; 109 } 110 111 static int uvesafb_helper_start(void) 112 { 113 char *envp[] = { 114 "HOME=/", 115 "PATH=/sbin:/bin", 116 NULL, 117 }; 118 119 char *argv[] = { 120 v86d_path, 121 NULL, 122 }; 123 124 return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); 125 } 126 127 /* 128 * Execute a uvesafb task. 129 * 130 * Returns 0 if the task is executed successfully. 131 * 132 * A message sent to the userspace consists of the uvesafb_task 133 * struct and (optionally) a buffer. The uvesafb_task struct is 134 * a simplified version of uvesafb_ktask (its kernel counterpart) 135 * containing only the register values, flags and the length of 136 * the buffer. 137 * 138 * Each message is assigned a sequence number (increased linearly) 139 * and a random ack number. The sequence number is used as a key 140 * for the uvfb_tasks array which holds pointers to uvesafb_ktask 141 * structs for all requests. 142 */ 143 static int uvesafb_exec(struct uvesafb_ktask *task) 144 { 145 static int seq; 146 struct cn_msg *m; 147 int err; 148 int len = sizeof(task->t) + task->t.buf_len; 149 150 /* 151 * Check whether the message isn't longer than the maximum 152 * allowed by connector. 153 */ 154 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) { 155 pr_warn("message too long (%d), can't execute task\n", 156 (int)(sizeof(*m) + len)); 157 return -E2BIG; 158 } 159 160 m = kzalloc(sizeof(*m) + len, GFP_KERNEL); 161 if (!m) 162 return -ENOMEM; 163 164 init_completion(task->done); 165 166 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id)); 167 m->seq = seq; 168 m->len = len; 169 m->ack = prandom_u32(); 170 171 /* uvesafb_task structure */ 172 memcpy(m + 1, &task->t, sizeof(task->t)); 173 174 /* Buffer */ 175 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len); 176 177 /* 178 * Save the message ack number so that we can find the kernel 179 * part of this task when a reply is received from userspace. 180 */ 181 task->ack = m->ack; 182 183 mutex_lock(&uvfb_lock); 184 185 /* If all slots are taken -- bail out. */ 186 if (uvfb_tasks[seq]) { 187 mutex_unlock(&uvfb_lock); 188 err = -EBUSY; 189 goto out; 190 } 191 192 /* Save a pointer to the kernel part of the task struct. */ 193 uvfb_tasks[seq] = task; 194 mutex_unlock(&uvfb_lock); 195 196 err = cn_netlink_send(m, 0, 0, GFP_KERNEL); 197 if (err == -ESRCH) { 198 /* 199 * Try to start the userspace helper if sending 200 * the request failed the first time. 201 */ 202 err = uvesafb_helper_start(); 203 if (err) { 204 pr_err("failed to execute %s\n", v86d_path); 205 pr_err("make sure that the v86d helper is installed and executable\n"); 206 } else { 207 v86d_started = 1; 208 err = cn_netlink_send(m, 0, 0, gfp_any()); 209 if (err == -ENOBUFS) 210 err = 0; 211 } 212 } else if (err == -ENOBUFS) 213 err = 0; 214 215 if (!err && !(task->t.flags & TF_EXIT)) 216 err = !wait_for_completion_timeout(task->done, 217 msecs_to_jiffies(UVESAFB_TIMEOUT)); 218 219 mutex_lock(&uvfb_lock); 220 uvfb_tasks[seq] = NULL; 221 mutex_unlock(&uvfb_lock); 222 223 seq++; 224 if (seq >= UVESAFB_TASKS_MAX) 225 seq = 0; 226 out: 227 kfree(m); 228 return err; 229 } 230 231 /* 232 * Free a uvesafb_ktask struct. 233 */ 234 static void uvesafb_free(struct uvesafb_ktask *task) 235 { 236 if (task) { 237 kfree(task->done); 238 kfree(task); 239 } 240 } 241 242 /* 243 * Prepare a uvesafb_ktask struct to be used again. 244 */ 245 static void uvesafb_reset(struct uvesafb_ktask *task) 246 { 247 struct completion *cpl = task->done; 248 249 memset(task, 0, sizeof(*task)); 250 task->done = cpl; 251 } 252 253 /* 254 * Allocate and prepare a uvesafb_ktask struct. 255 */ 256 static struct uvesafb_ktask *uvesafb_prep(void) 257 { 258 struct uvesafb_ktask *task; 259 260 task = kzalloc(sizeof(*task), GFP_KERNEL); 261 if (task) { 262 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); 263 if (!task->done) { 264 kfree(task); 265 task = NULL; 266 } 267 } 268 return task; 269 } 270 271 static void uvesafb_setup_var(struct fb_var_screeninfo *var, 272 struct fb_info *info, struct vbe_mode_ib *mode) 273 { 274 struct uvesafb_par *par = info->par; 275 276 var->vmode = FB_VMODE_NONINTERLACED; 277 var->sync = FB_SYNC_VERT_HIGH_ACT; 278 279 var->xres = mode->x_res; 280 var->yres = mode->y_res; 281 var->xres_virtual = mode->x_res; 282 var->yres_virtual = (par->ypan) ? 283 info->fix.smem_len / mode->bytes_per_scan_line : 284 mode->y_res; 285 var->xoffset = 0; 286 var->yoffset = 0; 287 var->bits_per_pixel = mode->bits_per_pixel; 288 289 if (var->bits_per_pixel == 15) 290 var->bits_per_pixel = 16; 291 292 if (var->bits_per_pixel > 8) { 293 var->red.offset = mode->red_off; 294 var->red.length = mode->red_len; 295 var->green.offset = mode->green_off; 296 var->green.length = mode->green_len; 297 var->blue.offset = mode->blue_off; 298 var->blue.length = mode->blue_len; 299 var->transp.offset = mode->rsvd_off; 300 var->transp.length = mode->rsvd_len; 301 } else { 302 var->red.offset = 0; 303 var->green.offset = 0; 304 var->blue.offset = 0; 305 var->transp.offset = 0; 306 307 var->red.length = 8; 308 var->green.length = 8; 309 var->blue.length = 8; 310 var->transp.length = 0; 311 } 312 } 313 314 static int uvesafb_vbe_find_mode(struct uvesafb_par *par, 315 int xres, int yres, int depth, unsigned char flags) 316 { 317 int i, match = -1, h = 0, d = 0x7fffffff; 318 319 for (i = 0; i < par->vbe_modes_cnt; i++) { 320 h = abs(par->vbe_modes[i].x_res - xres) + 321 abs(par->vbe_modes[i].y_res - yres) + 322 abs(depth - par->vbe_modes[i].depth); 323 324 /* 325 * We have an exact match in terms of resolution 326 * and depth. 327 */ 328 if (h == 0) 329 return i; 330 331 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { 332 d = h; 333 match = i; 334 } 335 } 336 i = 1; 337 338 if (flags & UVESAFB_EXACT_DEPTH && 339 par->vbe_modes[match].depth != depth) 340 i = 0; 341 342 if (flags & UVESAFB_EXACT_RES && d > 24) 343 i = 0; 344 345 if (i != 0) 346 return match; 347 else 348 return -1; 349 } 350 351 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) 352 { 353 struct uvesafb_ktask *task; 354 u8 *state; 355 int err; 356 357 if (!par->vbe_state_size) 358 return NULL; 359 360 state = kmalloc(par->vbe_state_size, GFP_KERNEL); 361 if (!state) 362 return ERR_PTR(-ENOMEM); 363 364 task = uvesafb_prep(); 365 if (!task) { 366 kfree(state); 367 return NULL; 368 } 369 370 task->t.regs.eax = 0x4f04; 371 task->t.regs.ecx = 0x000f; 372 task->t.regs.edx = 0x0001; 373 task->t.flags = TF_BUF_RET | TF_BUF_ESBX; 374 task->t.buf_len = par->vbe_state_size; 375 task->buf = state; 376 err = uvesafb_exec(task); 377 378 if (err || (task->t.regs.eax & 0xffff) != 0x004f) { 379 pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n", 380 task->t.regs.eax, err); 381 kfree(state); 382 state = NULL; 383 } 384 385 uvesafb_free(task); 386 return state; 387 } 388 389 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) 390 { 391 struct uvesafb_ktask *task; 392 int err; 393 394 if (!state_buf) 395 return; 396 397 task = uvesafb_prep(); 398 if (!task) 399 return; 400 401 task->t.regs.eax = 0x4f04; 402 task->t.regs.ecx = 0x000f; 403 task->t.regs.edx = 0x0002; 404 task->t.buf_len = par->vbe_state_size; 405 task->t.flags = TF_BUF_ESBX; 406 task->buf = state_buf; 407 408 err = uvesafb_exec(task); 409 if (err || (task->t.regs.eax & 0xffff) != 0x004f) 410 pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n", 411 task->t.regs.eax, err); 412 413 uvesafb_free(task); 414 } 415 416 static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, 417 struct uvesafb_par *par) 418 { 419 int err; 420 421 task->t.regs.eax = 0x4f00; 422 task->t.flags = TF_VBEIB; 423 task->t.buf_len = sizeof(struct vbe_ib); 424 task->buf = &par->vbe_ib; 425 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4); 426 427 err = uvesafb_exec(task); 428 if (err || (task->t.regs.eax & 0xffff) != 0x004f) { 429 pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n", 430 (u32)task->t.regs.eax, err); 431 return -EINVAL; 432 } 433 434 if (par->vbe_ib.vbe_version < 0x0200) { 435 pr_err("Sorry, pre-VBE 2.0 cards are not supported\n"); 436 return -EINVAL; 437 } 438 439 if (!par->vbe_ib.mode_list_ptr) { 440 pr_err("Missing mode list!\n"); 441 return -EINVAL; 442 } 443 444 pr_info(""); 445 446 /* 447 * Convert string pointers and the mode list pointer into 448 * usable addresses. Print informational messages about the 449 * video adapter and its vendor. 450 */ 451 if (par->vbe_ib.oem_vendor_name_ptr) 452 pr_cont("%s, ", 453 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); 454 455 if (par->vbe_ib.oem_product_name_ptr) 456 pr_cont("%s, ", 457 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); 458 459 if (par->vbe_ib.oem_product_rev_ptr) 460 pr_cont("%s, ", 461 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); 462 463 if (par->vbe_ib.oem_string_ptr) 464 pr_cont("OEM: %s, ", 465 ((char *)task->buf) + par->vbe_ib.oem_string_ptr); 466 467 pr_cont("VBE v%d.%d\n", 468 (par->vbe_ib.vbe_version & 0xff00) >> 8, 469 par->vbe_ib.vbe_version & 0xff); 470 471 return 0; 472 } 473 474 static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, 475 struct uvesafb_par *par) 476 { 477 int off = 0, err; 478 u16 *mode; 479 480 par->vbe_modes_cnt = 0; 481 482 /* Count available modes. */ 483 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); 484 while (*mode != 0xffff) { 485 par->vbe_modes_cnt++; 486 mode++; 487 } 488 489 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) * 490 par->vbe_modes_cnt, GFP_KERNEL); 491 if (!par->vbe_modes) 492 return -ENOMEM; 493 494 /* Get info about all available modes. */ 495 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); 496 while (*mode != 0xffff) { 497 struct vbe_mode_ib *mib; 498 499 uvesafb_reset(task); 500 task->t.regs.eax = 0x4f01; 501 task->t.regs.ecx = (u32) *mode; 502 task->t.flags = TF_BUF_RET | TF_BUF_ESDI; 503 task->t.buf_len = sizeof(struct vbe_mode_ib); 504 task->buf = par->vbe_modes + off; 505 506 err = uvesafb_exec(task); 507 if (err || (task->t.regs.eax & 0xffff) != 0x004f) { 508 pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n", 509 *mode, (u32)task->t.regs.eax, err); 510 mode++; 511 par->vbe_modes_cnt--; 512 continue; 513 } 514 515 mib = task->buf; 516 mib->mode_id = *mode; 517 518 /* 519 * We only want modes that are supported with the current 520 * hardware configuration, color, graphics and that have 521 * support for the LFB. 522 */ 523 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && 524 mib->bits_per_pixel >= 8) 525 off++; 526 else 527 par->vbe_modes_cnt--; 528 529 mode++; 530 mib->depth = mib->red_len + mib->green_len + mib->blue_len; 531 532 /* 533 * Handle 8bpp modes and modes with broken color component 534 * lengths. 535 */ 536 if (mib->depth == 0 || (mib->depth == 24 && 537 mib->bits_per_pixel == 32)) 538 mib->depth = mib->bits_per_pixel; 539 } 540 541 if (par->vbe_modes_cnt > 0) 542 return 0; 543 else 544 return -EINVAL; 545 } 546 547 /* 548 * The Protected Mode Interface is 32-bit x86 code, so we only run it on 549 * x86 and not x86_64. 550 */ 551 #ifdef CONFIG_X86_32 552 static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, 553 struct uvesafb_par *par) 554 { 555 int i, err; 556 557 uvesafb_reset(task); 558 task->t.regs.eax = 0x4f0a; 559 task->t.regs.ebx = 0x0; 560 err = uvesafb_exec(task); 561 562 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { 563 par->pmi_setpal = par->ypan = 0; 564 } else { 565 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) 566 + task->t.regs.edi); 567 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; 568 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; 569 pr_info("protected mode interface info at %04x:%04x\n", 570 (u16)task->t.regs.es, (u16)task->t.regs.edi); 571 pr_info("pmi: set display start = %p, set palette = %p\n", 572 par->pmi_start, par->pmi_pal); 573 574 if (par->pmi_base[3]) { 575 pr_info("pmi: ports ="); 576 for (i = par->pmi_base[3]/2; 577 par->pmi_base[i] != 0xffff; i++) 578 pr_cont(" %x", par->pmi_base[i]); 579 pr_cont("\n"); 580 581 if (par->pmi_base[i] != 0xffff) { 582 pr_info("can't handle memory requests, pmi disabled\n"); 583 par->ypan = par->pmi_setpal = 0; 584 } 585 } 586 } 587 return 0; 588 } 589 #endif /* CONFIG_X86_32 */ 590 591 /* 592 * Check whether a video mode is supported by the Video BIOS and is 593 * compatible with the monitor limits. 594 */ 595 static int uvesafb_is_valid_mode(struct fb_videomode *mode, 596 struct fb_info *info) 597 { 598 if (info->monspecs.gtf) { 599 fb_videomode_to_var(&info->var, mode); 600 if (fb_validate_mode(&info->var, info)) 601 return 0; 602 } 603 604 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8, 605 UVESAFB_EXACT_RES) == -1) 606 return 0; 607 608 return 1; 609 } 610 611 static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info) 612 { 613 struct uvesafb_par *par = info->par; 614 int err = 0; 615 616 if (noedid || par->vbe_ib.vbe_version < 0x0300) 617 return -EINVAL; 618 619 task->t.regs.eax = 0x4f15; 620 task->t.regs.ebx = 0; 621 task->t.regs.ecx = 0; 622 task->t.buf_len = 0; 623 task->t.flags = 0; 624 625 err = uvesafb_exec(task); 626 627 if ((task->t.regs.eax & 0xffff) != 0x004f || err) 628 return -EINVAL; 629 630 if ((task->t.regs.ebx & 0x3) == 3) { 631 pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n"); 632 } else if ((task->t.regs.ebx & 0x3) == 2) { 633 pr_info("VBIOS/hardware supports DDC2 transfers\n"); 634 } else if ((task->t.regs.ebx & 0x3) == 1) { 635 pr_info("VBIOS/hardware supports DDC1 transfers\n"); 636 } else { 637 pr_info("VBIOS/hardware doesn't support DDC transfers\n"); 638 return -EINVAL; 639 } 640 641 task->t.regs.eax = 0x4f15; 642 task->t.regs.ebx = 1; 643 task->t.regs.ecx = task->t.regs.edx = 0; 644 task->t.flags = TF_BUF_RET | TF_BUF_ESDI; 645 task->t.buf_len = EDID_LENGTH; 646 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL); 647 if (!task->buf) 648 return -ENOMEM; 649 650 err = uvesafb_exec(task); 651 652 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) { 653 fb_edid_to_monspecs(task->buf, &info->monspecs); 654 655 if (info->monspecs.vfmax && info->monspecs.hfmax) { 656 /* 657 * If the maximum pixel clock wasn't specified in 658 * the EDID block, set it to 300 MHz. 659 */ 660 if (info->monspecs.dclkmax == 0) 661 info->monspecs.dclkmax = 300 * 1000000; 662 info->monspecs.gtf = 1; 663 } 664 } else { 665 err = -EINVAL; 666 } 667 668 kfree(task->buf); 669 return err; 670 } 671 672 static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task, 673 struct fb_info *info) 674 { 675 struct uvesafb_par *par = info->par; 676 int i; 677 678 memset(&info->monspecs, 0, sizeof(info->monspecs)); 679 680 /* 681 * If we don't get all necessary data from the EDID block, 682 * mark it as incompatible with the GTF and set nocrtc so 683 * that we always use the default BIOS refresh rate. 684 */ 685 if (uvesafb_vbe_getedid(task, info)) { 686 info->monspecs.gtf = 0; 687 par->nocrtc = 1; 688 } 689 690 /* Kernel command line overrides. */ 691 if (maxclk) 692 info->monspecs.dclkmax = maxclk * 1000000; 693 if (maxvf) 694 info->monspecs.vfmax = maxvf; 695 if (maxhf) 696 info->monspecs.hfmax = maxhf * 1000; 697 698 /* 699 * In case DDC transfers are not supported, the user can provide 700 * monitor limits manually. Lower limits are set to "safe" values. 701 */ 702 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) { 703 info->monspecs.dclkmin = 0; 704 info->monspecs.vfmin = 60; 705 info->monspecs.hfmin = 29000; 706 info->monspecs.gtf = 1; 707 par->nocrtc = 0; 708 } 709 710 if (info->monspecs.gtf) 711 pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n", 712 info->monspecs.vfmax, 713 (int)(info->monspecs.hfmax / 1000), 714 (int)(info->monspecs.dclkmax / 1000000)); 715 else 716 pr_info("no monitor limits have been set, default refresh rate will be used\n"); 717 718 /* Add VBE modes to the modelist. */ 719 for (i = 0; i < par->vbe_modes_cnt; i++) { 720 struct fb_var_screeninfo var; 721 struct vbe_mode_ib *mode; 722 struct fb_videomode vmode; 723 724 mode = &par->vbe_modes[i]; 725 memset(&var, 0, sizeof(var)); 726 727 var.xres = mode->x_res; 728 var.yres = mode->y_res; 729 730 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info); 731 fb_var_to_videomode(&vmode, &var); 732 fb_add_videomode(&vmode, &info->modelist); 733 } 734 735 /* Add valid VESA modes to our modelist. */ 736 for (i = 0; i < VESA_MODEDB_SIZE; i++) { 737 if (uvesafb_is_valid_mode((struct fb_videomode *) 738 &vesa_modes[i], info)) 739 fb_add_videomode(&vesa_modes[i], &info->modelist); 740 } 741 742 for (i = 0; i < info->monspecs.modedb_len; i++) { 743 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info)) 744 fb_add_videomode(&info->monspecs.modedb[i], 745 &info->modelist); 746 } 747 748 return; 749 } 750 751 static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task, 752 struct uvesafb_par *par) 753 { 754 int err; 755 756 uvesafb_reset(task); 757 758 /* 759 * Get the VBE state buffer size. We want all available 760 * hardware state data (CL = 0x0f). 761 */ 762 task->t.regs.eax = 0x4f04; 763 task->t.regs.ecx = 0x000f; 764 task->t.regs.edx = 0x0000; 765 task->t.flags = 0; 766 767 err = uvesafb_exec(task); 768 769 if (err || (task->t.regs.eax & 0xffff) != 0x004f) { 770 pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n", 771 task->t.regs.eax, err); 772 par->vbe_state_size = 0; 773 return; 774 } 775 776 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff); 777 } 778 779 static int uvesafb_vbe_init(struct fb_info *info) 780 { 781 struct uvesafb_ktask *task = NULL; 782 struct uvesafb_par *par = info->par; 783 int err; 784 785 task = uvesafb_prep(); 786 if (!task) 787 return -ENOMEM; 788 789 err = uvesafb_vbe_getinfo(task, par); 790 if (err) 791 goto out; 792 793 err = uvesafb_vbe_getmodes(task, par); 794 if (err) 795 goto out; 796 797 par->nocrtc = nocrtc; 798 #ifdef CONFIG_X86_32 799 par->pmi_setpal = pmi_setpal; 800 par->ypan = ypan; 801 802 if (par->pmi_setpal || par->ypan) { 803 if (__supported_pte_mask & _PAGE_NX) { 804 par->pmi_setpal = par->ypan = 0; 805 pr_warn("NX protection is active, better not use the PMI\n"); 806 } else { 807 uvesafb_vbe_getpmi(task, par); 808 } 809 } 810 #else 811 /* The protected mode interface is not available on non-x86. */ 812 par->pmi_setpal = par->ypan = 0; 813 #endif 814 815 INIT_LIST_HEAD(&info->modelist); 816 uvesafb_vbe_getmonspecs(task, info); 817 uvesafb_vbe_getstatesize(task, par); 818 819 out: uvesafb_free(task); 820 return err; 821 } 822 823 static int uvesafb_vbe_init_mode(struct fb_info *info) 824 { 825 struct list_head *pos; 826 struct fb_modelist *modelist; 827 struct fb_videomode *mode; 828 struct uvesafb_par *par = info->par; 829 int i, modeid; 830 831 /* Has the user requested a specific VESA mode? */ 832 if (vbemode) { 833 for (i = 0; i < par->vbe_modes_cnt; i++) { 834 if (par->vbe_modes[i].mode_id == vbemode) { 835 modeid = i; 836 uvesafb_setup_var(&info->var, info, 837 &par->vbe_modes[modeid]); 838 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, 839 &info->var, info); 840 /* 841 * With pixclock set to 0, the default BIOS 842 * timings will be used in set_par(). 843 */ 844 info->var.pixclock = 0; 845 goto gotmode; 846 } 847 } 848 pr_info("requested VBE mode 0x%x is unavailable\n", vbemode); 849 vbemode = 0; 850 } 851 852 /* Count the modes in the modelist */ 853 i = 0; 854 list_for_each(pos, &info->modelist) 855 i++; 856 857 /* 858 * Convert the modelist into a modedb so that we can use it with 859 * fb_find_mode(). 860 */ 861 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL); 862 if (mode) { 863 i = 0; 864 list_for_each(pos, &info->modelist) { 865 modelist = list_entry(pos, struct fb_modelist, list); 866 mode[i] = modelist->mode; 867 i++; 868 } 869 870 if (!mode_option) 871 mode_option = UVESAFB_DEFAULT_MODE; 872 873 i = fb_find_mode(&info->var, info, mode_option, mode, i, 874 NULL, 8); 875 876 kfree(mode); 877 } 878 879 /* fb_find_mode() failed */ 880 if (i == 0) { 881 info->var.xres = 640; 882 info->var.yres = 480; 883 mode = (struct fb_videomode *) 884 fb_find_best_mode(&info->var, &info->modelist); 885 886 if (mode) { 887 fb_videomode_to_var(&info->var, mode); 888 } else { 889 modeid = par->vbe_modes[0].mode_id; 890 uvesafb_setup_var(&info->var, info, 891 &par->vbe_modes[modeid]); 892 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, 893 &info->var, info); 894 895 goto gotmode; 896 } 897 } 898 899 /* Look for a matching VBE mode. */ 900 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, 901 info->var.bits_per_pixel, UVESAFB_EXACT_RES); 902 903 if (modeid == -1) 904 return -EINVAL; 905 906 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); 907 908 gotmode: 909 /* 910 * If we are not VBE3.0+ compliant, we're done -- the BIOS will 911 * ignore our timings anyway. 912 */ 913 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc) 914 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, 915 &info->var, info); 916 917 return modeid; 918 } 919 920 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count, 921 int start, struct fb_info *info) 922 { 923 struct uvesafb_ktask *task; 924 #ifdef CONFIG_X86 925 struct uvesafb_par *par = info->par; 926 int i = par->mode_idx; 927 #endif 928 int err = 0; 929 930 /* 931 * We support palette modifications for 8 bpp modes only, so 932 * there can never be more than 256 entries. 933 */ 934 if (start + count > 256) 935 return -EINVAL; 936 937 #ifdef CONFIG_X86 938 /* Use VGA registers if mode is VGA-compatible. */ 939 if (i >= 0 && i < par->vbe_modes_cnt && 940 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) { 941 for (i = 0; i < count; i++) { 942 outb_p(start + i, dac_reg); 943 outb_p(entries[i].red, dac_val); 944 outb_p(entries[i].green, dac_val); 945 outb_p(entries[i].blue, dac_val); 946 } 947 } 948 #ifdef CONFIG_X86_32 949 else if (par->pmi_setpal) { 950 __asm__ __volatile__( 951 "call *(%%esi)" 952 : /* no return value */ 953 : "a" (0x4f09), /* EAX */ 954 "b" (0), /* EBX */ 955 "c" (count), /* ECX */ 956 "d" (start), /* EDX */ 957 "D" (entries), /* EDI */ 958 "S" (&par->pmi_pal)); /* ESI */ 959 } 960 #endif /* CONFIG_X86_32 */ 961 else 962 #endif /* CONFIG_X86 */ 963 { 964 task = uvesafb_prep(); 965 if (!task) 966 return -ENOMEM; 967 968 task->t.regs.eax = 0x4f09; 969 task->t.regs.ebx = 0x0; 970 task->t.regs.ecx = count; 971 task->t.regs.edx = start; 972 task->t.flags = TF_BUF_ESDI; 973 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count; 974 task->buf = entries; 975 976 err = uvesafb_exec(task); 977 if ((task->t.regs.eax & 0xffff) != 0x004f) 978 err = 1; 979 980 uvesafb_free(task); 981 } 982 return err; 983 } 984 985 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green, 986 unsigned blue, unsigned transp, 987 struct fb_info *info) 988 { 989 struct uvesafb_pal_entry entry; 990 int shift = 16 - dac_width; 991 int err = 0; 992 993 if (regno >= info->cmap.len) 994 return -EINVAL; 995 996 if (info->var.bits_per_pixel == 8) { 997 entry.red = red >> shift; 998 entry.green = green >> shift; 999 entry.blue = blue >> shift; 1000 entry.pad = 0; 1001 1002 err = uvesafb_setpalette(&entry, 1, regno, info); 1003 } else if (regno < 16) { 1004 switch (info->var.bits_per_pixel) { 1005 case 16: 1006 if (info->var.red.offset == 10) { 1007 /* 1:5:5:5 */ 1008 ((u32 *) (info->pseudo_palette))[regno] = 1009 ((red & 0xf800) >> 1) | 1010 ((green & 0xf800) >> 6) | 1011 ((blue & 0xf800) >> 11); 1012 } else { 1013 /* 0:5:6:5 */ 1014 ((u32 *) (info->pseudo_palette))[regno] = 1015 ((red & 0xf800) ) | 1016 ((green & 0xfc00) >> 5) | 1017 ((blue & 0xf800) >> 11); 1018 } 1019 break; 1020 1021 case 24: 1022 case 32: 1023 red >>= 8; 1024 green >>= 8; 1025 blue >>= 8; 1026 ((u32 *)(info->pseudo_palette))[regno] = 1027 (red << info->var.red.offset) | 1028 (green << info->var.green.offset) | 1029 (blue << info->var.blue.offset); 1030 break; 1031 } 1032 } 1033 return err; 1034 } 1035 1036 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) 1037 { 1038 struct uvesafb_pal_entry *entries; 1039 int shift = 16 - dac_width; 1040 int i, err = 0; 1041 1042 if (info->var.bits_per_pixel == 8) { 1043 if (cmap->start + cmap->len > info->cmap.start + 1044 info->cmap.len || cmap->start < info->cmap.start) 1045 return -EINVAL; 1046 1047 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL); 1048 if (!entries) 1049 return -ENOMEM; 1050 1051 for (i = 0; i < cmap->len; i++) { 1052 entries[i].red = cmap->red[i] >> shift; 1053 entries[i].green = cmap->green[i] >> shift; 1054 entries[i].blue = cmap->blue[i] >> shift; 1055 entries[i].pad = 0; 1056 } 1057 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info); 1058 kfree(entries); 1059 } else { 1060 /* 1061 * For modes with bpp > 8, we only set the pseudo palette in 1062 * the fb_info struct. We rely on uvesafb_setcolreg to do all 1063 * sanity checking. 1064 */ 1065 for (i = 0; i < cmap->len; i++) { 1066 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i], 1067 cmap->green[i], cmap->blue[i], 1068 0, info); 1069 } 1070 } 1071 return err; 1072 } 1073 1074 static int uvesafb_pan_display(struct fb_var_screeninfo *var, 1075 struct fb_info *info) 1076 { 1077 #ifdef CONFIG_X86_32 1078 int offset; 1079 struct uvesafb_par *par = info->par; 1080 1081 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; 1082 1083 /* 1084 * It turns out it's not the best idea to do panning via vm86, 1085 * so we only allow it if we have a PMI. 1086 */ 1087 if (par->pmi_start) { 1088 __asm__ __volatile__( 1089 "call *(%%edi)" 1090 : /* no return value */ 1091 : "a" (0x4f07), /* EAX */ 1092 "b" (0), /* EBX */ 1093 "c" (offset), /* ECX */ 1094 "d" (offset >> 16), /* EDX */ 1095 "D" (&par->pmi_start)); /* EDI */ 1096 } 1097 #endif 1098 return 0; 1099 } 1100 1101 static int uvesafb_blank(int blank, struct fb_info *info) 1102 { 1103 struct uvesafb_ktask *task; 1104 int err = 1; 1105 #ifdef CONFIG_X86 1106 struct uvesafb_par *par = info->par; 1107 1108 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) { 1109 int loop = 10000; 1110 u8 seq = 0, crtc17 = 0; 1111 1112 if (blank == FB_BLANK_POWERDOWN) { 1113 seq = 0x20; 1114 crtc17 = 0x00; 1115 err = 0; 1116 } else { 1117 seq = 0x00; 1118 crtc17 = 0x80; 1119 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; 1120 } 1121 1122 vga_wseq(NULL, 0x00, 0x01); 1123 seq |= vga_rseq(NULL, 0x01) & ~0x20; 1124 vga_wseq(NULL, 0x00, seq); 1125 1126 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; 1127 while (loop--); 1128 vga_wcrt(NULL, 0x17, crtc17); 1129 vga_wseq(NULL, 0x00, 0x03); 1130 } else 1131 #endif /* CONFIG_X86 */ 1132 { 1133 task = uvesafb_prep(); 1134 if (!task) 1135 return -ENOMEM; 1136 1137 task->t.regs.eax = 0x4f10; 1138 switch (blank) { 1139 case FB_BLANK_UNBLANK: 1140 task->t.regs.ebx = 0x0001; 1141 break; 1142 case FB_BLANK_NORMAL: 1143 task->t.regs.ebx = 0x0101; /* standby */ 1144 break; 1145 case FB_BLANK_POWERDOWN: 1146 task->t.regs.ebx = 0x0401; /* powerdown */ 1147 break; 1148 default: 1149 goto out; 1150 } 1151 1152 err = uvesafb_exec(task); 1153 if (err || (task->t.regs.eax & 0xffff) != 0x004f) 1154 err = 1; 1155 out: uvesafb_free(task); 1156 } 1157 return err; 1158 } 1159 1160 static int uvesafb_open(struct fb_info *info, int user) 1161 { 1162 struct uvesafb_par *par = info->par; 1163 int cnt = atomic_read(&par->ref_count); 1164 u8 *buf = NULL; 1165 1166 if (!cnt && par->vbe_state_size) { 1167 buf = uvesafb_vbe_state_save(par); 1168 if (IS_ERR(buf)) { 1169 pr_warn("save hardware state failed, error code is %ld!\n", 1170 PTR_ERR(buf)); 1171 } else { 1172 par->vbe_state_orig = buf; 1173 } 1174 } 1175 1176 atomic_inc(&par->ref_count); 1177 return 0; 1178 } 1179 1180 static int uvesafb_release(struct fb_info *info, int user) 1181 { 1182 struct uvesafb_ktask *task = NULL; 1183 struct uvesafb_par *par = info->par; 1184 int cnt = atomic_read(&par->ref_count); 1185 1186 if (!cnt) 1187 return -EINVAL; 1188 1189 if (cnt != 1) 1190 goto out; 1191 1192 task = uvesafb_prep(); 1193 if (!task) 1194 goto out; 1195 1196 /* First, try to set the standard 80x25 text mode. */ 1197 task->t.regs.eax = 0x0003; 1198 uvesafb_exec(task); 1199 1200 /* 1201 * Now try to restore whatever hardware state we might have 1202 * saved when the fb device was first opened. 1203 */ 1204 uvesafb_vbe_state_restore(par, par->vbe_state_orig); 1205 out: 1206 atomic_dec(&par->ref_count); 1207 uvesafb_free(task); 1208 return 0; 1209 } 1210 1211 static int uvesafb_set_par(struct fb_info *info) 1212 { 1213 struct uvesafb_par *par = info->par; 1214 struct uvesafb_ktask *task = NULL; 1215 struct vbe_crtc_ib *crtc = NULL; 1216 struct vbe_mode_ib *mode = NULL; 1217 int i, err = 0, depth = info->var.bits_per_pixel; 1218 1219 if (depth > 8 && depth != 32) 1220 depth = info->var.red.length + info->var.green.length + 1221 info->var.blue.length; 1222 1223 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth, 1224 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH); 1225 if (i >= 0) 1226 mode = &par->vbe_modes[i]; 1227 else 1228 return -EINVAL; 1229 1230 task = uvesafb_prep(); 1231 if (!task) 1232 return -ENOMEM; 1233 setmode: 1234 task->t.regs.eax = 0x4f02; 1235 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */ 1236 1237 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc && 1238 info->var.pixclock != 0) { 1239 task->t.regs.ebx |= 0x0800; /* use CRTC data */ 1240 task->t.flags = TF_BUF_ESDI; 1241 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL); 1242 if (!crtc) { 1243 err = -ENOMEM; 1244 goto out; 1245 } 1246 crtc->horiz_start = info->var.xres + info->var.right_margin; 1247 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len; 1248 crtc->horiz_total = crtc->horiz_end + info->var.left_margin; 1249 1250 crtc->vert_start = info->var.yres + info->var.lower_margin; 1251 crtc->vert_end = crtc->vert_start + info->var.vsync_len; 1252 crtc->vert_total = crtc->vert_end + info->var.upper_margin; 1253 1254 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000; 1255 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock / 1256 (crtc->vert_total * crtc->horiz_total))); 1257 1258 if (info->var.vmode & FB_VMODE_DOUBLE) 1259 crtc->flags |= 0x1; 1260 if (info->var.vmode & FB_VMODE_INTERLACED) 1261 crtc->flags |= 0x2; 1262 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) 1263 crtc->flags |= 0x4; 1264 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) 1265 crtc->flags |= 0x8; 1266 memcpy(&par->crtc, crtc, sizeof(*crtc)); 1267 } else { 1268 memset(&par->crtc, 0, sizeof(*crtc)); 1269 } 1270 1271 task->t.buf_len = sizeof(struct vbe_crtc_ib); 1272 task->buf = &par->crtc; 1273 1274 err = uvesafb_exec(task); 1275 if (err || (task->t.regs.eax & 0xffff) != 0x004f) { 1276 /* 1277 * The mode switch might have failed because we tried to 1278 * use our own timings. Try again with the default timings. 1279 */ 1280 if (crtc != NULL) { 1281 pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n", 1282 task->t.regs.eax, err); 1283 uvesafb_reset(task); 1284 kfree(crtc); 1285 crtc = NULL; 1286 info->var.pixclock = 0; 1287 goto setmode; 1288 } else { 1289 pr_err("mode switch failed (eax=0x%x, err=%d)\n", 1290 task->t.regs.eax, err); 1291 err = -EINVAL; 1292 goto out; 1293 } 1294 } 1295 par->mode_idx = i; 1296 1297 /* For 8bpp modes, always try to set the DAC to 8 bits. */ 1298 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC && 1299 mode->bits_per_pixel <= 8) { 1300 uvesafb_reset(task); 1301 task->t.regs.eax = 0x4f08; 1302 task->t.regs.ebx = 0x0800; 1303 1304 err = uvesafb_exec(task); 1305 if (err || (task->t.regs.eax & 0xffff) != 0x004f || 1306 ((task->t.regs.ebx & 0xff00) >> 8) != 8) { 1307 dac_width = 6; 1308 } else { 1309 dac_width = 8; 1310 } 1311 } 1312 1313 info->fix.visual = (info->var.bits_per_pixel == 8) ? 1314 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; 1315 info->fix.line_length = mode->bytes_per_scan_line; 1316 1317 out: 1318 kfree(crtc); 1319 uvesafb_free(task); 1320 1321 return err; 1322 } 1323 1324 static void uvesafb_check_limits(struct fb_var_screeninfo *var, 1325 struct fb_info *info) 1326 { 1327 const struct fb_videomode *mode; 1328 struct uvesafb_par *par = info->par; 1329 1330 /* 1331 * If pixclock is set to 0, then we're using default BIOS timings 1332 * and thus don't have to perform any checks here. 1333 */ 1334 if (!var->pixclock) 1335 return; 1336 1337 if (par->vbe_ib.vbe_version < 0x0300) { 1338 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info); 1339 return; 1340 } 1341 1342 if (!fb_validate_mode(var, info)) 1343 return; 1344 1345 mode = fb_find_best_mode(var, &info->modelist); 1346 if (mode) { 1347 if (mode->xres == var->xres && mode->yres == var->yres && 1348 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) { 1349 fb_videomode_to_var(var, mode); 1350 return; 1351 } 1352 } 1353 1354 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info)) 1355 return; 1356 /* Use default refresh rate */ 1357 var->pixclock = 0; 1358 } 1359 1360 static int uvesafb_check_var(struct fb_var_screeninfo *var, 1361 struct fb_info *info) 1362 { 1363 struct uvesafb_par *par = info->par; 1364 struct vbe_mode_ib *mode = NULL; 1365 int match = -1; 1366 int depth = var->red.length + var->green.length + var->blue.length; 1367 1368 /* 1369 * Various apps will use bits_per_pixel to set the color depth, 1370 * which is theoretically incorrect, but which we'll try to handle 1371 * here. 1372 */ 1373 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8) 1374 depth = var->bits_per_pixel; 1375 1376 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth, 1377 UVESAFB_EXACT_RES); 1378 if (match == -1) 1379 return -EINVAL; 1380 1381 mode = &par->vbe_modes[match]; 1382 uvesafb_setup_var(var, info, mode); 1383 1384 /* 1385 * Check whether we have remapped enough memory for this mode. 1386 * We might be called at an early stage, when we haven't remapped 1387 * any memory yet, in which case we simply skip the check. 1388 */ 1389 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len 1390 && info->fix.smem_len) 1391 return -EINVAL; 1392 1393 if ((var->vmode & FB_VMODE_DOUBLE) && 1394 !(par->vbe_modes[match].mode_attr & 0x100)) 1395 var->vmode &= ~FB_VMODE_DOUBLE; 1396 1397 if ((var->vmode & FB_VMODE_INTERLACED) && 1398 !(par->vbe_modes[match].mode_attr & 0x200)) 1399 var->vmode &= ~FB_VMODE_INTERLACED; 1400 1401 uvesafb_check_limits(var, info); 1402 1403 var->xres_virtual = var->xres; 1404 var->yres_virtual = (par->ypan) ? 1405 info->fix.smem_len / mode->bytes_per_scan_line : 1406 var->yres; 1407 return 0; 1408 } 1409 1410 static struct fb_ops uvesafb_ops = { 1411 .owner = THIS_MODULE, 1412 .fb_open = uvesafb_open, 1413 .fb_release = uvesafb_release, 1414 .fb_setcolreg = uvesafb_setcolreg, 1415 .fb_setcmap = uvesafb_setcmap, 1416 .fb_pan_display = uvesafb_pan_display, 1417 .fb_blank = uvesafb_blank, 1418 .fb_fillrect = cfb_fillrect, 1419 .fb_copyarea = cfb_copyarea, 1420 .fb_imageblit = cfb_imageblit, 1421 .fb_check_var = uvesafb_check_var, 1422 .fb_set_par = uvesafb_set_par, 1423 }; 1424 1425 static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) 1426 { 1427 unsigned int size_vmode; 1428 unsigned int size_remap; 1429 unsigned int size_total; 1430 struct uvesafb_par *par = info->par; 1431 int i, h; 1432 1433 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); 1434 info->fix = uvesafb_fix; 1435 info->fix.ypanstep = par->ypan ? 1 : 0; 1436 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; 1437 1438 /* Disable blanking if the user requested so. */ 1439 if (!blank) 1440 info->fbops->fb_blank = NULL; 1441 1442 /* 1443 * Find out how much IO memory is required for the mode with 1444 * the highest resolution. 1445 */ 1446 size_remap = 0; 1447 for (i = 0; i < par->vbe_modes_cnt; i++) { 1448 h = par->vbe_modes[i].bytes_per_scan_line * 1449 par->vbe_modes[i].y_res; 1450 if (h > size_remap) 1451 size_remap = h; 1452 } 1453 size_remap *= 2; 1454 1455 /* 1456 * size_vmode -- that is the amount of memory needed for the 1457 * used video mode, i.e. the minimum amount of 1458 * memory we need. 1459 */ 1460 size_vmode = info->var.yres * mode->bytes_per_scan_line; 1461 1462 /* 1463 * size_total -- all video memory we have. Used for mtrr 1464 * entries, resource allocation and bounds 1465 * checking. 1466 */ 1467 size_total = par->vbe_ib.total_memory * 65536; 1468 if (vram_total) 1469 size_total = vram_total * 1024 * 1024; 1470 if (size_total < size_vmode) 1471 size_total = size_vmode; 1472 1473 /* 1474 * size_remap -- the amount of video memory we are going to 1475 * use for vesafb. With modern cards it is no 1476 * option to simply use size_total as th 1477 * wastes plenty of kernel address space. 1478 */ 1479 if (vram_remap) 1480 size_remap = vram_remap * 1024 * 1024; 1481 if (size_remap < size_vmode) 1482 size_remap = size_vmode; 1483 if (size_remap > size_total) 1484 size_remap = size_total; 1485 1486 info->fix.smem_len = size_remap; 1487 info->fix.smem_start = mode->phys_base_ptr; 1488 1489 /* 1490 * We have to set yres_virtual here because when setup_var() was 1491 * called, smem_len wasn't defined yet. 1492 */ 1493 info->var.yres_virtual = info->fix.smem_len / 1494 mode->bytes_per_scan_line; 1495 1496 if (par->ypan && info->var.yres_virtual > info->var.yres) { 1497 pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", 1498 (par->ypan > 1) ? "ywrap" : "ypan", 1499 info->var.yres_virtual); 1500 } else { 1501 pr_info("scrolling: redraw\n"); 1502 info->var.yres_virtual = info->var.yres; 1503 par->ypan = 0; 1504 } 1505 1506 info->flags = FBINFO_FLAG_DEFAULT | 1507 (par->ypan ? FBINFO_HWACCEL_YPAN : 0); 1508 1509 if (!par->ypan) 1510 info->fbops->fb_pan_display = NULL; 1511 } 1512 1513 static void uvesafb_init_mtrr(struct fb_info *info) 1514 { 1515 struct uvesafb_par *par = info->par; 1516 1517 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { 1518 int temp_size = info->fix.smem_len; 1519 1520 int rc; 1521 1522 /* Find the largest power-of-two */ 1523 temp_size = roundup_pow_of_two(temp_size); 1524 1525 /* Try and find a power of two to add */ 1526 do { 1527 rc = arch_phys_wc_add(info->fix.smem_start, temp_size); 1528 temp_size >>= 1; 1529 } while (temp_size >= PAGE_SIZE && rc == -EINVAL); 1530 1531 if (rc >= 0) 1532 par->mtrr_handle = rc; 1533 } 1534 } 1535 1536 static void uvesafb_ioremap(struct fb_info *info) 1537 { 1538 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); 1539 } 1540 1541 static ssize_t uvesafb_show_vbe_ver(struct device *dev, 1542 struct device_attribute *attr, char *buf) 1543 { 1544 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1545 struct uvesafb_par *par = info->par; 1546 1547 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version); 1548 } 1549 1550 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL); 1551 1552 static ssize_t uvesafb_show_vbe_modes(struct device *dev, 1553 struct device_attribute *attr, char *buf) 1554 { 1555 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1556 struct uvesafb_par *par = info->par; 1557 int ret = 0, i; 1558 1559 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { 1560 ret += snprintf(buf + ret, PAGE_SIZE - ret, 1561 "%dx%d-%d, 0x%.4x\n", 1562 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res, 1563 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id); 1564 } 1565 1566 return ret; 1567 } 1568 1569 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL); 1570 1571 static ssize_t uvesafb_show_vendor(struct device *dev, 1572 struct device_attribute *attr, char *buf) 1573 { 1574 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1575 struct uvesafb_par *par = info->par; 1576 1577 if (par->vbe_ib.oem_vendor_name_ptr) 1578 return snprintf(buf, PAGE_SIZE, "%s\n", (char *) 1579 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); 1580 else 1581 return 0; 1582 } 1583 1584 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL); 1585 1586 static ssize_t uvesafb_show_product_name(struct device *dev, 1587 struct device_attribute *attr, char *buf) 1588 { 1589 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1590 struct uvesafb_par *par = info->par; 1591 1592 if (par->vbe_ib.oem_product_name_ptr) 1593 return snprintf(buf, PAGE_SIZE, "%s\n", (char *) 1594 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); 1595 else 1596 return 0; 1597 } 1598 1599 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL); 1600 1601 static ssize_t uvesafb_show_product_rev(struct device *dev, 1602 struct device_attribute *attr, char *buf) 1603 { 1604 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1605 struct uvesafb_par *par = info->par; 1606 1607 if (par->vbe_ib.oem_product_rev_ptr) 1608 return snprintf(buf, PAGE_SIZE, "%s\n", (char *) 1609 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); 1610 else 1611 return 0; 1612 } 1613 1614 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL); 1615 1616 static ssize_t uvesafb_show_oem_string(struct device *dev, 1617 struct device_attribute *attr, char *buf) 1618 { 1619 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1620 struct uvesafb_par *par = info->par; 1621 1622 if (par->vbe_ib.oem_string_ptr) 1623 return snprintf(buf, PAGE_SIZE, "%s\n", 1624 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); 1625 else 1626 return 0; 1627 } 1628 1629 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL); 1630 1631 static ssize_t uvesafb_show_nocrtc(struct device *dev, 1632 struct device_attribute *attr, char *buf) 1633 { 1634 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1635 struct uvesafb_par *par = info->par; 1636 1637 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc); 1638 } 1639 1640 static ssize_t uvesafb_store_nocrtc(struct device *dev, 1641 struct device_attribute *attr, const char *buf, size_t count) 1642 { 1643 struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); 1644 struct uvesafb_par *par = info->par; 1645 1646 if (count > 0) { 1647 if (buf[0] == '0') 1648 par->nocrtc = 0; 1649 else 1650 par->nocrtc = 1; 1651 } 1652 return count; 1653 } 1654 1655 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc, 1656 uvesafb_store_nocrtc); 1657 1658 static struct attribute *uvesafb_dev_attrs[] = { 1659 &dev_attr_vbe_version.attr, 1660 &dev_attr_vbe_modes.attr, 1661 &dev_attr_oem_vendor.attr, 1662 &dev_attr_oem_product_name.attr, 1663 &dev_attr_oem_product_rev.attr, 1664 &dev_attr_oem_string.attr, 1665 &dev_attr_nocrtc.attr, 1666 NULL, 1667 }; 1668 1669 static const struct attribute_group uvesafb_dev_attgrp = { 1670 .name = NULL, 1671 .attrs = uvesafb_dev_attrs, 1672 }; 1673 1674 static int uvesafb_probe(struct platform_device *dev) 1675 { 1676 struct fb_info *info; 1677 struct vbe_mode_ib *mode = NULL; 1678 struct uvesafb_par *par; 1679 int err = 0, i; 1680 1681 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev); 1682 if (!info) 1683 return -ENOMEM; 1684 1685 par = info->par; 1686 1687 err = uvesafb_vbe_init(info); 1688 if (err) { 1689 pr_err("vbe_init() failed with %d\n", err); 1690 goto out; 1691 } 1692 1693 info->fbops = &uvesafb_ops; 1694 1695 i = uvesafb_vbe_init_mode(info); 1696 if (i < 0) { 1697 err = -EINVAL; 1698 goto out; 1699 } else { 1700 mode = &par->vbe_modes[i]; 1701 } 1702 1703 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { 1704 err = -ENXIO; 1705 goto out; 1706 } 1707 1708 uvesafb_init_info(info, mode); 1709 1710 if (!request_region(0x3c0, 32, "uvesafb")) { 1711 pr_err("request region 0x3c0-0x3e0 failed\n"); 1712 err = -EIO; 1713 goto out_mode; 1714 } 1715 1716 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, 1717 "uvesafb")) { 1718 pr_err("cannot reserve video memory at 0x%lx\n", 1719 info->fix.smem_start); 1720 err = -EIO; 1721 goto out_reg; 1722 } 1723 1724 uvesafb_init_mtrr(info); 1725 uvesafb_ioremap(info); 1726 1727 if (!info->screen_base) { 1728 pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n", 1729 info->fix.smem_len, info->fix.smem_start); 1730 err = -EIO; 1731 goto out_mem; 1732 } 1733 1734 platform_set_drvdata(dev, info); 1735 1736 if (register_framebuffer(info) < 0) { 1737 pr_err("failed to register framebuffer device\n"); 1738 err = -EINVAL; 1739 goto out_unmap; 1740 } 1741 1742 pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n", 1743 info->fix.smem_start, info->screen_base, 1744 info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64); 1745 fb_info(info, "%s frame buffer device\n", info->fix.id); 1746 1747 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); 1748 if (err != 0) 1749 fb_warn(info, "failed to register attributes\n"); 1750 1751 return 0; 1752 1753 out_unmap: 1754 iounmap(info->screen_base); 1755 out_mem: 1756 release_mem_region(info->fix.smem_start, info->fix.smem_len); 1757 out_reg: 1758 release_region(0x3c0, 32); 1759 out_mode: 1760 if (!list_empty(&info->modelist)) 1761 fb_destroy_modelist(&info->modelist); 1762 fb_destroy_modedb(info->monspecs.modedb); 1763 fb_dealloc_cmap(&info->cmap); 1764 out: 1765 kfree(par->vbe_modes); 1766 1767 framebuffer_release(info); 1768 return err; 1769 } 1770 1771 static int uvesafb_remove(struct platform_device *dev) 1772 { 1773 struct fb_info *info = platform_get_drvdata(dev); 1774 1775 if (info) { 1776 struct uvesafb_par *par = info->par; 1777 1778 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp); 1779 unregister_framebuffer(info); 1780 release_region(0x3c0, 32); 1781 iounmap(info->screen_base); 1782 arch_phys_wc_del(par->mtrr_handle); 1783 release_mem_region(info->fix.smem_start, info->fix.smem_len); 1784 fb_destroy_modedb(info->monspecs.modedb); 1785 fb_dealloc_cmap(&info->cmap); 1786 1787 kfree(par->vbe_modes); 1788 kfree(par->vbe_state_orig); 1789 kfree(par->vbe_state_saved); 1790 1791 framebuffer_release(info); 1792 } 1793 return 0; 1794 } 1795 1796 static struct platform_driver uvesafb_driver = { 1797 .probe = uvesafb_probe, 1798 .remove = uvesafb_remove, 1799 .driver = { 1800 .name = "uvesafb", 1801 }, 1802 }; 1803 1804 static struct platform_device *uvesafb_device; 1805 1806 #ifndef MODULE 1807 static int uvesafb_setup(char *options) 1808 { 1809 char *this_opt; 1810 1811 if (!options || !*options) 1812 return 0; 1813 1814 while ((this_opt = strsep(&options, ",")) != NULL) { 1815 if (!*this_opt) continue; 1816 1817 if (!strcmp(this_opt, "redraw")) 1818 ypan = 0; 1819 else if (!strcmp(this_opt, "ypan")) 1820 ypan = 1; 1821 else if (!strcmp(this_opt, "ywrap")) 1822 ypan = 2; 1823 else if (!strcmp(this_opt, "vgapal")) 1824 pmi_setpal = 0; 1825 else if (!strcmp(this_opt, "pmipal")) 1826 pmi_setpal = 1; 1827 else if (!strncmp(this_opt, "mtrr:", 5)) 1828 mtrr = simple_strtoul(this_opt+5, NULL, 0); 1829 else if (!strcmp(this_opt, "nomtrr")) 1830 mtrr = 0; 1831 else if (!strcmp(this_opt, "nocrtc")) 1832 nocrtc = 1; 1833 else if (!strcmp(this_opt, "noedid")) 1834 noedid = 1; 1835 else if (!strcmp(this_opt, "noblank")) 1836 blank = 0; 1837 else if (!strncmp(this_opt, "vtotal:", 7)) 1838 vram_total = simple_strtoul(this_opt + 7, NULL, 0); 1839 else if (!strncmp(this_opt, "vremap:", 7)) 1840 vram_remap = simple_strtoul(this_opt + 7, NULL, 0); 1841 else if (!strncmp(this_opt, "maxhf:", 6)) 1842 maxhf = simple_strtoul(this_opt + 6, NULL, 0); 1843 else if (!strncmp(this_opt, "maxvf:", 6)) 1844 maxvf = simple_strtoul(this_opt + 6, NULL, 0); 1845 else if (!strncmp(this_opt, "maxclk:", 7)) 1846 maxclk = simple_strtoul(this_opt + 7, NULL, 0); 1847 else if (!strncmp(this_opt, "vbemode:", 8)) 1848 vbemode = simple_strtoul(this_opt + 8, NULL, 0); 1849 else if (this_opt[0] >= '0' && this_opt[0] <= '9') { 1850 mode_option = this_opt; 1851 } else { 1852 pr_warn("unrecognized option %s\n", this_opt); 1853 } 1854 } 1855 1856 if (mtrr != 3 && mtrr != 0) 1857 pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); 1858 1859 return 0; 1860 } 1861 #endif /* !MODULE */ 1862 1863 static ssize_t v86d_show(struct device_driver *dev, char *buf) 1864 { 1865 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); 1866 } 1867 1868 static ssize_t v86d_store(struct device_driver *dev, const char *buf, 1869 size_t count) 1870 { 1871 strncpy(v86d_path, buf, PATH_MAX); 1872 return count; 1873 } 1874 static DRIVER_ATTR_RW(v86d); 1875 1876 static int uvesafb_init(void) 1877 { 1878 int err; 1879 1880 #ifndef MODULE 1881 char *option = NULL; 1882 1883 if (fb_get_options("uvesafb", &option)) 1884 return -ENODEV; 1885 uvesafb_setup(option); 1886 #endif 1887 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback); 1888 if (err) 1889 return err; 1890 1891 err = platform_driver_register(&uvesafb_driver); 1892 1893 if (!err) { 1894 uvesafb_device = platform_device_alloc("uvesafb", 0); 1895 if (uvesafb_device) 1896 err = platform_device_add(uvesafb_device); 1897 else 1898 err = -ENOMEM; 1899 1900 if (err) { 1901 platform_device_put(uvesafb_device); 1902 platform_driver_unregister(&uvesafb_driver); 1903 cn_del_callback(&uvesafb_cn_id); 1904 return err; 1905 } 1906 1907 err = driver_create_file(&uvesafb_driver.driver, 1908 &driver_attr_v86d); 1909 if (err) { 1910 pr_warn("failed to register attributes\n"); 1911 err = 0; 1912 } 1913 } 1914 return err; 1915 } 1916 1917 module_init(uvesafb_init); 1918 1919 static void uvesafb_exit(void) 1920 { 1921 struct uvesafb_ktask *task; 1922 1923 if (v86d_started) { 1924 task = uvesafb_prep(); 1925 if (task) { 1926 task->t.flags = TF_EXIT; 1927 uvesafb_exec(task); 1928 uvesafb_free(task); 1929 } 1930 } 1931 1932 cn_del_callback(&uvesafb_cn_id); 1933 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); 1934 platform_device_unregister(uvesafb_device); 1935 platform_driver_unregister(&uvesafb_driver); 1936 } 1937 1938 module_exit(uvesafb_exit); 1939 1940 static int param_set_scroll(const char *val, const struct kernel_param *kp) 1941 { 1942 ypan = 0; 1943 1944 if (!strcmp(val, "redraw")) 1945 ypan = 0; 1946 else if (!strcmp(val, "ypan")) 1947 ypan = 1; 1948 else if (!strcmp(val, "ywrap")) 1949 ypan = 2; 1950 else 1951 return -EINVAL; 1952 1953 return 0; 1954 } 1955 static const struct kernel_param_ops param_ops_scroll = { 1956 .set = param_set_scroll, 1957 }; 1958 #define param_check_scroll(name, p) __param_check(name, p, void) 1959 1960 module_param_named(scroll, ypan, scroll, 0); 1961 MODULE_PARM_DESC(scroll, 1962 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'"); 1963 module_param_named(vgapal, pmi_setpal, invbool, 0); 1964 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers"); 1965 module_param_named(pmipal, pmi_setpal, bool, 0); 1966 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls"); 1967 module_param(mtrr, uint, 0); 1968 MODULE_PARM_DESC(mtrr, 1969 "Memory Type Range Registers setting. Use 0 to disable."); 1970 module_param(blank, bool, 0); 1971 MODULE_PARM_DESC(blank, "Enable hardware blanking"); 1972 module_param(nocrtc, bool, 0); 1973 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes"); 1974 module_param(noedid, bool, 0); 1975 MODULE_PARM_DESC(noedid, 1976 "Ignore EDID-provided monitor limits when setting modes"); 1977 module_param(vram_remap, uint, 0); 1978 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]"); 1979 module_param(vram_total, uint, 0); 1980 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]"); 1981 module_param(maxclk, ushort, 0); 1982 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data"); 1983 module_param(maxhf, ushort, 0); 1984 MODULE_PARM_DESC(maxhf, 1985 "Maximum horizontal frequency [kHz], overrides EDID data"); 1986 module_param(maxvf, ushort, 0); 1987 MODULE_PARM_DESC(maxvf, 1988 "Maximum vertical frequency [Hz], overrides EDID data"); 1989 module_param(mode_option, charp, 0); 1990 MODULE_PARM_DESC(mode_option, 1991 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\""); 1992 module_param(vbemode, ushort, 0); 1993 MODULE_PARM_DESC(vbemode, 1994 "VBE mode number to set, overrides the 'mode' option"); 1995 module_param_string(v86d, v86d_path, PATH_MAX, 0660); 1996 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper."); 1997 1998 MODULE_LICENSE("GPL"); 1999 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>"); 2000 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); 2001 2002