1 /* 2 * linux/drivers/video/vgacon.c -- Low level VGA based console driver 3 * 4 * Created 28 Sep 1997 by Geert Uytterhoeven 5 * 6 * Rewritten by Martin Mares <mj@ucw.cz>, July 1998 7 * 8 * This file is based on the old console.c, vga.c and vesa_blank.c drivers. 9 * 10 * Copyright (C) 1991, 1992 Linus Torvalds 11 * 1995 Jay Estabrook 12 * 13 * User definable mapping table and font loading by Eugene G. Crosser, 14 * <crosser@average.org> 15 * 16 * Improved loadable font/UTF-8 support by H. Peter Anvin 17 * Feb-Sep 1995 <peter.anvin@linux.org> 18 * 19 * Colour palette handling, by Simon Tatham 20 * 17-Jun-95 <sgt20@cam.ac.uk> 21 * 22 * if 512 char mode is already enabled don't re-enable it, 23 * because it causes screen to flicker, by Mitja Horvat 24 * 5-May-96 <mitja.horvat@guest.arnes.si> 25 * 26 * Use 2 outw instead of 4 outb_p to reduce erroneous text 27 * flashing on RHS of screen during heavy console scrolling . 28 * Oct 1996, Paul Gortmaker. 29 * 30 * 31 * This file is subject to the terms and conditions of the GNU General Public 32 * License. See the file COPYING in the main directory of this archive for 33 * more details. 34 */ 35 36 #include <linux/module.h> 37 #include <linux/types.h> 38 #include <linux/fs.h> 39 #include <linux/kernel.h> 40 #include <linux/console.h> 41 #include <linux/string.h> 42 #include <linux/kd.h> 43 #include <linux/slab.h> 44 #include <linux/vt_kern.h> 45 #include <linux/selection.h> 46 #include <linux/spinlock.h> 47 #include <linux/ioport.h> 48 #include <linux/init.h> 49 #include <linux/screen_info.h> 50 #include <linux/smp_lock.h> 51 #include <video/vga.h> 52 #include <asm/io.h> 53 54 static DEFINE_SPINLOCK(vga_lock); 55 static int cursor_size_lastfrom; 56 static int cursor_size_lastto; 57 static u32 vgacon_xres; 58 static u32 vgacon_yres; 59 static struct vgastate state; 60 61 #define BLANK 0x0020 62 63 #define CAN_LOAD_EGA_FONTS /* undefine if the user must not do this */ 64 #define CAN_LOAD_PALETTE /* undefine if the user must not do this */ 65 66 /* You really do _NOT_ want to define this, unless you have buggy 67 * Trident VGA which will resize cursor when moving it between column 68 * 15 & 16. If you define this and your VGA is OK, inverse bug will 69 * appear. 70 */ 71 #undef TRIDENT_GLITCH 72 #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ 73 /* 74 * Interface used by the world 75 */ 76 77 static const char *vgacon_startup(void); 78 static void vgacon_init(struct vc_data *c, int init); 79 static void vgacon_deinit(struct vc_data *c); 80 static void vgacon_cursor(struct vc_data *c, int mode); 81 static int vgacon_switch(struct vc_data *c); 82 static int vgacon_blank(struct vc_data *c, int blank, int mode_switch); 83 static int vgacon_set_palette(struct vc_data *vc, unsigned char *table); 84 static int vgacon_scrolldelta(struct vc_data *c, int lines); 85 static int vgacon_set_origin(struct vc_data *c); 86 static void vgacon_save_screen(struct vc_data *c); 87 static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, 88 int lines); 89 static void vgacon_invert_region(struct vc_data *c, u16 * p, int count); 90 static unsigned long vgacon_uni_pagedir[2]; 91 92 /* Description of the hardware situation */ 93 static int vga_init_done __read_mostly; 94 static unsigned long vga_vram_base __read_mostly; /* Base of video memory */ 95 static unsigned long vga_vram_end __read_mostly; /* End of video memory */ 96 static unsigned int vga_vram_size __read_mostly; /* Size of video memory */ 97 static u16 vga_video_port_reg __read_mostly; /* Video register select port */ 98 static u16 vga_video_port_val __read_mostly; /* Video register value port */ 99 static unsigned int vga_video_num_columns; /* Number of text columns */ 100 static unsigned int vga_video_num_lines; /* Number of text lines */ 101 static int vga_can_do_color __read_mostly; /* Do we support colors? */ 102 static unsigned int vga_default_font_height __read_mostly; /* Height of default screen font */ 103 static unsigned char vga_video_type __read_mostly; /* Card type */ 104 static unsigned char vga_hardscroll_enabled __read_mostly; 105 static unsigned char vga_hardscroll_user_enable __read_mostly = 1; 106 static unsigned char vga_font_is_default = 1; 107 static int vga_vesa_blanked; 108 static int vga_palette_blanked; 109 static int vga_is_gfx; 110 static int vga_512_chars; 111 static int vga_video_font_height; 112 static int vga_scan_lines __read_mostly; 113 static unsigned int vga_rolled_over; 114 115 int vgacon_text_mode_force = 0; 116 117 bool vgacon_text_force(void) 118 { 119 return vgacon_text_mode_force ? true : false; 120 } 121 EXPORT_SYMBOL(vgacon_text_force); 122 123 static int __init text_mode(char *str) 124 { 125 vgacon_text_mode_force = 1; 126 return 1; 127 } 128 129 /* force text mode - used by kernel modesetting */ 130 __setup("nomodeset", text_mode); 131 132 static int __init no_scroll(char *str) 133 { 134 /* 135 * Disabling scrollback is required for the Braillex ib80-piezo 136 * Braille reader made by F.H. Papenmeier (Germany). 137 * Use the "no-scroll" bootflag. 138 */ 139 vga_hardscroll_user_enable = vga_hardscroll_enabled = 0; 140 return 1; 141 } 142 143 __setup("no-scroll", no_scroll); 144 145 /* 146 * By replacing the four outb_p with two back to back outw, we can reduce 147 * the window of opportunity to see text mislocated to the RHS of the 148 * console during heavy scrolling activity. However there is the remote 149 * possibility that some pre-dinosaur hardware won't like the back to back 150 * I/O. Since the Xservers get away with it, we should be able to as well. 151 */ 152 static inline void write_vga(unsigned char reg, unsigned int val) 153 { 154 unsigned int v1, v2; 155 unsigned long flags; 156 157 /* 158 * ddprintk might set the console position from interrupt 159 * handlers, thus the write has to be IRQ-atomic. 160 */ 161 spin_lock_irqsave(&vga_lock, flags); 162 163 #ifndef SLOW_VGA 164 v1 = reg + (val & 0xff00); 165 v2 = reg + 1 + ((val << 8) & 0xff00); 166 outw(v1, vga_video_port_reg); 167 outw(v2, vga_video_port_reg); 168 #else 169 outb_p(reg, vga_video_port_reg); 170 outb_p(val >> 8, vga_video_port_val); 171 outb_p(reg + 1, vga_video_port_reg); 172 outb_p(val & 0xff, vga_video_port_val); 173 #endif 174 spin_unlock_irqrestore(&vga_lock, flags); 175 } 176 177 static inline void vga_set_mem_top(struct vc_data *c) 178 { 179 write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2); 180 } 181 182 #ifdef CONFIG_VGACON_SOFT_SCROLLBACK 183 #include <linux/bootmem.h> 184 /* software scrollback */ 185 static void *vgacon_scrollback; 186 static int vgacon_scrollback_tail; 187 static int vgacon_scrollback_size; 188 static int vgacon_scrollback_rows; 189 static int vgacon_scrollback_cnt; 190 static int vgacon_scrollback_cur; 191 static int vgacon_scrollback_save; 192 static int vgacon_scrollback_restore; 193 194 static void vgacon_scrollback_init(int pitch) 195 { 196 int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; 197 198 if (vgacon_scrollback) { 199 vgacon_scrollback_cnt = 0; 200 vgacon_scrollback_tail = 0; 201 vgacon_scrollback_cur = 0; 202 vgacon_scrollback_rows = rows - 1; 203 vgacon_scrollback_size = rows * pitch; 204 } 205 } 206 207 /* 208 * Called only duing init so call of alloc_bootmen is ok. 209 * Marked __init_refok to silence modpost. 210 */ 211 static void __init_refok vgacon_scrollback_startup(void) 212 { 213 vgacon_scrollback = alloc_bootmem(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE 214 * 1024); 215 vgacon_scrollback_init(vga_video_num_columns * 2); 216 } 217 218 static void vgacon_scrollback_update(struct vc_data *c, int t, int count) 219 { 220 void *p; 221 222 if (!vgacon_scrollback_size || c->vc_num != fg_console) 223 return; 224 225 p = (void *) (c->vc_origin + t * c->vc_size_row); 226 227 while (count--) { 228 scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, 229 p, c->vc_size_row); 230 vgacon_scrollback_cnt++; 231 p += c->vc_size_row; 232 vgacon_scrollback_tail += c->vc_size_row; 233 234 if (vgacon_scrollback_tail >= vgacon_scrollback_size) 235 vgacon_scrollback_tail = 0; 236 237 if (vgacon_scrollback_cnt > vgacon_scrollback_rows) 238 vgacon_scrollback_cnt = vgacon_scrollback_rows; 239 240 vgacon_scrollback_cur = vgacon_scrollback_cnt; 241 } 242 } 243 244 static void vgacon_restore_screen(struct vc_data *c) 245 { 246 vgacon_scrollback_save = 0; 247 248 if (!vga_is_gfx && !vgacon_scrollback_restore) { 249 scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, 250 c->vc_screenbuf_size > vga_vram_size ? 251 vga_vram_size : c->vc_screenbuf_size); 252 vgacon_scrollback_restore = 1; 253 vgacon_scrollback_cur = vgacon_scrollback_cnt; 254 } 255 } 256 257 static int vgacon_scrolldelta(struct vc_data *c, int lines) 258 { 259 int start, end, count, soff; 260 261 if (!lines) { 262 c->vc_visible_origin = c->vc_origin; 263 vga_set_mem_top(c); 264 return 1; 265 } 266 267 if (!vgacon_scrollback) 268 return 1; 269 270 if (!vgacon_scrollback_save) { 271 vgacon_cursor(c, CM_ERASE); 272 vgacon_save_screen(c); 273 vgacon_scrollback_save = 1; 274 } 275 276 vgacon_scrollback_restore = 0; 277 start = vgacon_scrollback_cur + lines; 278 end = start + abs(lines); 279 280 if (start < 0) 281 start = 0; 282 283 if (start > vgacon_scrollback_cnt) 284 start = vgacon_scrollback_cnt; 285 286 if (end < 0) 287 end = 0; 288 289 if (end > vgacon_scrollback_cnt) 290 end = vgacon_scrollback_cnt; 291 292 vgacon_scrollback_cur = start; 293 count = end - start; 294 soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * 295 c->vc_size_row); 296 soff -= count * c->vc_size_row; 297 298 if (soff < 0) 299 soff += vgacon_scrollback_size; 300 301 count = vgacon_scrollback_cnt - start; 302 303 if (count > c->vc_rows) 304 count = c->vc_rows; 305 306 if (count) { 307 int copysize; 308 309 int diff = c->vc_rows - count; 310 void *d = (void *) c->vc_origin; 311 void *s = (void *) c->vc_screenbuf; 312 313 count *= c->vc_size_row; 314 /* how much memory to end of buffer left? */ 315 copysize = min(count, vgacon_scrollback_size - soff); 316 scr_memcpyw(d, vgacon_scrollback + soff, copysize); 317 d += copysize; 318 count -= copysize; 319 320 if (count) { 321 scr_memcpyw(d, vgacon_scrollback, count); 322 d += count; 323 } 324 325 if (diff) 326 scr_memcpyw(d, s, diff * c->vc_size_row); 327 } else 328 vgacon_cursor(c, CM_MOVE); 329 330 return 1; 331 } 332 #else 333 #define vgacon_scrollback_startup(...) do { } while (0) 334 #define vgacon_scrollback_init(...) do { } while (0) 335 #define vgacon_scrollback_update(...) do { } while (0) 336 337 static void vgacon_restore_screen(struct vc_data *c) 338 { 339 if (c->vc_origin != c->vc_visible_origin) 340 vgacon_scrolldelta(c, 0); 341 } 342 343 static int vgacon_scrolldelta(struct vc_data *c, int lines) 344 { 345 if (!lines) /* Turn scrollback off */ 346 c->vc_visible_origin = c->vc_origin; 347 else { 348 int margin = c->vc_size_row * 4; 349 int ul, we, p, st; 350 351 if (vga_rolled_over > 352 (c->vc_scr_end - vga_vram_base) + margin) { 353 ul = c->vc_scr_end - vga_vram_base; 354 we = vga_rolled_over + c->vc_size_row; 355 } else { 356 ul = 0; 357 we = vga_vram_size; 358 } 359 p = (c->vc_visible_origin - vga_vram_base - ul + we) % we + 360 lines * c->vc_size_row; 361 st = (c->vc_origin - vga_vram_base - ul + we) % we; 362 if (st < 2 * margin) 363 margin = 0; 364 if (p < margin) 365 p = 0; 366 if (p > st - margin) 367 p = st; 368 c->vc_visible_origin = vga_vram_base + (p + ul) % we; 369 } 370 vga_set_mem_top(c); 371 return 1; 372 } 373 #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ 374 375 static const char *vgacon_startup(void) 376 { 377 const char *display_desc = NULL; 378 u16 saved1, saved2; 379 volatile u16 *p; 380 381 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB) { 382 no_vga: 383 #ifdef CONFIG_DUMMY_CONSOLE 384 conswitchp = &dummy_con; 385 return conswitchp->con_startup(); 386 #else 387 return NULL; 388 #endif 389 } 390 391 /* boot_params.screen_info initialized? */ 392 if ((screen_info.orig_video_mode == 0) && 393 (screen_info.orig_video_lines == 0) && 394 (screen_info.orig_video_cols == 0)) 395 goto no_vga; 396 397 /* VGA16 modes are not handled by VGACON */ 398 if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ 399 (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ 400 (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ 401 (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ 402 (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ 403 goto no_vga; 404 405 vga_video_num_lines = screen_info.orig_video_lines; 406 vga_video_num_columns = screen_info.orig_video_cols; 407 state.vgabase = NULL; 408 409 if (screen_info.orig_video_mode == 7) { 410 /* Monochrome display */ 411 vga_vram_base = 0xb0000; 412 vga_video_port_reg = VGA_CRT_IM; 413 vga_video_port_val = VGA_CRT_DM; 414 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 415 static struct resource ega_console_resource = 416 { .name = "ega", .start = 0x3B0, .end = 0x3BF }; 417 vga_video_type = VIDEO_TYPE_EGAM; 418 vga_vram_size = 0x8000; 419 display_desc = "EGA+"; 420 request_resource(&ioport_resource, 421 &ega_console_resource); 422 } else { 423 static struct resource mda1_console_resource = 424 { .name = "mda", .start = 0x3B0, .end = 0x3BB }; 425 static struct resource mda2_console_resource = 426 { .name = "mda", .start = 0x3BF, .end = 0x3BF }; 427 vga_video_type = VIDEO_TYPE_MDA; 428 vga_vram_size = 0x2000; 429 display_desc = "*MDA"; 430 request_resource(&ioport_resource, 431 &mda1_console_resource); 432 request_resource(&ioport_resource, 433 &mda2_console_resource); 434 vga_video_font_height = 14; 435 } 436 } else { 437 /* If not, it is color. */ 438 vga_can_do_color = 1; 439 vga_vram_base = 0xb8000; 440 vga_video_port_reg = VGA_CRT_IC; 441 vga_video_port_val = VGA_CRT_DC; 442 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 443 int i; 444 445 vga_vram_size = 0x8000; 446 447 if (!screen_info.orig_video_isVGA) { 448 static struct resource ega_console_resource 449 = { .name = "ega", .start = 0x3C0, .end = 0x3DF }; 450 vga_video_type = VIDEO_TYPE_EGAC; 451 display_desc = "EGA"; 452 request_resource(&ioport_resource, 453 &ega_console_resource); 454 } else { 455 static struct resource vga_console_resource 456 = { .name = "vga+", .start = 0x3C0, .end = 0x3DF }; 457 vga_video_type = VIDEO_TYPE_VGAC; 458 display_desc = "VGA+"; 459 request_resource(&ioport_resource, 460 &vga_console_resource); 461 462 #ifdef VGA_CAN_DO_64KB 463 /* 464 * get 64K rather than 32K of video RAM. 465 * This doesn't actually work on all "VGA" 466 * controllers (it seems like setting MM=01 467 * and COE=1 isn't necessarily a good idea) 468 */ 469 vga_vram_base = 0xa0000; 470 vga_vram_size = 0x10000; 471 outb_p(6, VGA_GFX_I); 472 outb_p(6, VGA_GFX_D); 473 #endif 474 /* 475 * Normalise the palette registers, to point 476 * the 16 screen colours to the first 16 477 * DAC entries. 478 */ 479 480 for (i = 0; i < 16; i++) { 481 inb_p(VGA_IS1_RC); 482 outb_p(i, VGA_ATT_W); 483 outb_p(i, VGA_ATT_W); 484 } 485 outb_p(0x20, VGA_ATT_W); 486 487 /* 488 * Now set the DAC registers back to their 489 * default values 490 */ 491 for (i = 0; i < 16; i++) { 492 outb_p(color_table[i], VGA_PEL_IW); 493 outb_p(default_red[i], VGA_PEL_D); 494 outb_p(default_grn[i], VGA_PEL_D); 495 outb_p(default_blu[i], VGA_PEL_D); 496 } 497 } 498 } else { 499 static struct resource cga_console_resource = 500 { .name = "cga", .start = 0x3D4, .end = 0x3D5 }; 501 vga_video_type = VIDEO_TYPE_CGA; 502 vga_vram_size = 0x2000; 503 display_desc = "*CGA"; 504 request_resource(&ioport_resource, 505 &cga_console_resource); 506 vga_video_font_height = 8; 507 } 508 } 509 510 vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); 511 vga_vram_end = vga_vram_base + vga_vram_size; 512 513 /* 514 * Find out if there is a graphics card present. 515 * Are there smarter methods around? 516 */ 517 p = (volatile u16 *) vga_vram_base; 518 saved1 = scr_readw(p); 519 saved2 = scr_readw(p + 1); 520 scr_writew(0xAA55, p); 521 scr_writew(0x55AA, p + 1); 522 if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { 523 scr_writew(saved1, p); 524 scr_writew(saved2, p + 1); 525 goto no_vga; 526 } 527 scr_writew(0x55AA, p); 528 scr_writew(0xAA55, p + 1); 529 if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { 530 scr_writew(saved1, p); 531 scr_writew(saved2, p + 1); 532 goto no_vga; 533 } 534 scr_writew(saved1, p); 535 scr_writew(saved2, p + 1); 536 537 if (vga_video_type == VIDEO_TYPE_EGAC 538 || vga_video_type == VIDEO_TYPE_VGAC 539 || vga_video_type == VIDEO_TYPE_EGAM) { 540 vga_hardscroll_enabled = vga_hardscroll_user_enable; 541 vga_default_font_height = screen_info.orig_video_points; 542 vga_video_font_height = screen_info.orig_video_points; 543 /* This may be suboptimal but is a safe bet - go with it */ 544 vga_scan_lines = 545 vga_video_font_height * vga_video_num_lines; 546 } 547 548 vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; 549 vgacon_yres = vga_scan_lines; 550 551 if (!vga_init_done) { 552 vgacon_scrollback_startup(); 553 vga_init_done = 1; 554 } 555 556 return display_desc; 557 } 558 559 static void vgacon_init(struct vc_data *c, int init) 560 { 561 unsigned long p; 562 563 /* 564 * We cannot be loaded as a module, therefore init is always 1, 565 * but vgacon_init can be called more than once, and init will 566 * not be 1. 567 */ 568 c->vc_can_do_color = vga_can_do_color; 569 570 /* set dimensions manually if init != 0 since vc_resize() will fail */ 571 if (init) { 572 c->vc_cols = vga_video_num_columns; 573 c->vc_rows = vga_video_num_lines; 574 } else 575 vc_resize(c, vga_video_num_columns, vga_video_num_lines); 576 577 c->vc_scan_lines = vga_scan_lines; 578 c->vc_font.height = vga_video_font_height; 579 c->vc_complement_mask = 0x7700; 580 if (vga_512_chars) 581 c->vc_hi_font_mask = 0x0800; 582 p = *c->vc_uni_pagedir_loc; 583 if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir || 584 !--c->vc_uni_pagedir_loc[1]) 585 con_free_unimap(c); 586 c->vc_uni_pagedir_loc = vgacon_uni_pagedir; 587 vgacon_uni_pagedir[1]++; 588 if (!vgacon_uni_pagedir[0] && p) 589 con_set_default_unimap(c); 590 } 591 592 static void vgacon_deinit(struct vc_data *c) 593 { 594 /* When closing the last console, reset video origin */ 595 if (!--vgacon_uni_pagedir[1]) { 596 c->vc_visible_origin = vga_vram_base; 597 vga_set_mem_top(c); 598 con_free_unimap(c); 599 } 600 c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; 601 con_set_default_unimap(c); 602 } 603 604 static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, 605 u8 blink, u8 underline, u8 reverse, u8 italic) 606 { 607 u8 attr = color; 608 609 if (vga_can_do_color) { 610 if (italic) 611 attr = (attr & 0xF0) | c->vc_itcolor; 612 else if (underline) 613 attr = (attr & 0xf0) | c->vc_ulcolor; 614 else if (intensity == 0) 615 attr = (attr & 0xf0) | c->vc_halfcolor; 616 } 617 if (reverse) 618 attr = 619 ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & 620 0x77); 621 if (blink) 622 attr ^= 0x80; 623 if (intensity == 2) 624 attr ^= 0x08; 625 if (!vga_can_do_color) { 626 if (italic) 627 attr = (attr & 0xF8) | 0x02; 628 else if (underline) 629 attr = (attr & 0xf8) | 0x01; 630 else if (intensity == 0) 631 attr = (attr & 0xf0) | 0x08; 632 } 633 return attr; 634 } 635 636 static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) 637 { 638 int col = vga_can_do_color; 639 640 while (count--) { 641 u16 a = scr_readw(p); 642 if (col) 643 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 644 (((a) & 0x0700) << 4); 645 else 646 a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; 647 scr_writew(a, p++); 648 } 649 } 650 651 static void vgacon_set_cursor_size(int xpos, int from, int to) 652 { 653 unsigned long flags; 654 int curs, cure; 655 656 #ifdef TRIDENT_GLITCH 657 if (xpos < 16) 658 from--, to--; 659 #endif 660 661 if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) 662 return; 663 cursor_size_lastfrom = from; 664 cursor_size_lastto = to; 665 666 spin_lock_irqsave(&vga_lock, flags); 667 if (vga_video_type >= VIDEO_TYPE_VGAC) { 668 outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); 669 curs = inb_p(vga_video_port_val); 670 outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); 671 cure = inb_p(vga_video_port_val); 672 } else { 673 curs = 0; 674 cure = 0; 675 } 676 677 curs = (curs & 0xc0) | from; 678 cure = (cure & 0xe0) | to; 679 680 outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); 681 outb_p(curs, vga_video_port_val); 682 outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); 683 outb_p(cure, vga_video_port_val); 684 spin_unlock_irqrestore(&vga_lock, flags); 685 } 686 687 static void vgacon_cursor(struct vc_data *c, int mode) 688 { 689 if (c->vc_mode != KD_TEXT) 690 return; 691 692 vgacon_restore_screen(c); 693 694 switch (mode) { 695 case CM_ERASE: 696 write_vga(14, (c->vc_pos - vga_vram_base) / 2); 697 if (vga_video_type >= VIDEO_TYPE_VGAC) 698 vgacon_set_cursor_size(c->vc_x, 31, 30); 699 else 700 vgacon_set_cursor_size(c->vc_x, 31, 31); 701 break; 702 703 case CM_MOVE: 704 case CM_DRAW: 705 write_vga(14, (c->vc_pos - vga_vram_base) / 2); 706 switch (c->vc_cursor_type & 0x0f) { 707 case CUR_UNDERLINE: 708 vgacon_set_cursor_size(c->vc_x, 709 c->vc_font.height - 710 (c->vc_font.height < 711 10 ? 2 : 3), 712 c->vc_font.height - 713 (c->vc_font.height < 714 10 ? 1 : 2)); 715 break; 716 case CUR_TWO_THIRDS: 717 vgacon_set_cursor_size(c->vc_x, 718 c->vc_font.height / 3, 719 c->vc_font.height - 720 (c->vc_font.height < 721 10 ? 1 : 2)); 722 break; 723 case CUR_LOWER_THIRD: 724 vgacon_set_cursor_size(c->vc_x, 725 (c->vc_font.height * 2) / 3, 726 c->vc_font.height - 727 (c->vc_font.height < 728 10 ? 1 : 2)); 729 break; 730 case CUR_LOWER_HALF: 731 vgacon_set_cursor_size(c->vc_x, 732 c->vc_font.height / 2, 733 c->vc_font.height - 734 (c->vc_font.height < 735 10 ? 1 : 2)); 736 break; 737 case CUR_NONE: 738 if (vga_video_type >= VIDEO_TYPE_VGAC) 739 vgacon_set_cursor_size(c->vc_x, 31, 30); 740 else 741 vgacon_set_cursor_size(c->vc_x, 31, 31); 742 break; 743 default: 744 vgacon_set_cursor_size(c->vc_x, 1, 745 c->vc_font.height); 746 break; 747 } 748 break; 749 } 750 } 751 752 static int vgacon_doresize(struct vc_data *c, 753 unsigned int width, unsigned int height) 754 { 755 unsigned long flags; 756 unsigned int scanlines = height * c->vc_font.height; 757 u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; 758 759 spin_lock_irqsave(&vga_lock, flags); 760 761 vgacon_xres = width * VGA_FONTWIDTH; 762 vgacon_yres = height * c->vc_font.height; 763 if (vga_video_type >= VIDEO_TYPE_VGAC) { 764 outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); 765 max_scan = inb_p(vga_video_port_val); 766 767 if (max_scan & 0x80) 768 scanlines <<= 1; 769 770 outb_p(VGA_CRTC_MODE, vga_video_port_reg); 771 mode = inb_p(vga_video_port_val); 772 773 if (mode & 0x04) 774 scanlines >>= 1; 775 776 scanlines -= 1; 777 scanlines_lo = scanlines & 0xff; 778 779 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); 780 r7 = inb_p(vga_video_port_val) & ~0x42; 781 782 if (scanlines & 0x100) 783 r7 |= 0x02; 784 if (scanlines & 0x200) 785 r7 |= 0x40; 786 787 /* deprotect registers */ 788 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 789 vsync_end = inb_p(vga_video_port_val); 790 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 791 outb_p(vsync_end & ~0x80, vga_video_port_val); 792 } 793 794 outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); 795 outb_p(width - 1, vga_video_port_val); 796 outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); 797 outb_p(width >> 1, vga_video_port_val); 798 799 if (vga_video_type >= VIDEO_TYPE_VGAC) { 800 outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); 801 outb_p(scanlines_lo, vga_video_port_val); 802 outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); 803 outb_p(r7,vga_video_port_val); 804 805 /* reprotect registers */ 806 outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); 807 outb_p(vsync_end, vga_video_port_val); 808 } 809 810 spin_unlock_irqrestore(&vga_lock, flags); 811 return 0; 812 } 813 814 static int vgacon_switch(struct vc_data *c) 815 { 816 int x = c->vc_cols * VGA_FONTWIDTH; 817 int y = c->vc_rows * c->vc_font.height; 818 int rows = screen_info.orig_video_lines * vga_default_font_height/ 819 c->vc_font.height; 820 /* 821 * We need to save screen size here as it's the only way 822 * we can spot the screen has been resized and we need to 823 * set size of freshly allocated screens ourselves. 824 */ 825 vga_video_num_columns = c->vc_cols; 826 vga_video_num_lines = c->vc_rows; 827 828 /* We can only copy out the size of the video buffer here, 829 * otherwise we get into VGA BIOS */ 830 831 if (!vga_is_gfx) { 832 scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, 833 c->vc_screenbuf_size > vga_vram_size ? 834 vga_vram_size : c->vc_screenbuf_size); 835 836 if ((vgacon_xres != x || vgacon_yres != y) && 837 (!(vga_video_num_columns % 2) && 838 vga_video_num_columns <= screen_info.orig_video_cols && 839 vga_video_num_lines <= rows)) 840 vgacon_doresize(c, c->vc_cols, c->vc_rows); 841 } 842 843 vgacon_scrollback_init(c->vc_size_row); 844 return 0; /* Redrawing not needed */ 845 } 846 847 static void vga_set_palette(struct vc_data *vc, unsigned char *table) 848 { 849 int i, j; 850 851 vga_w(state.vgabase, VGA_PEL_MSK, 0xff); 852 for (i = j = 0; i < 16; i++) { 853 vga_w(state.vgabase, VGA_PEL_IW, table[i]); 854 vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); 855 vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); 856 vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); 857 } 858 } 859 860 static int vgacon_set_palette(struct vc_data *vc, unsigned char *table) 861 { 862 #ifdef CAN_LOAD_PALETTE 863 if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked 864 || !CON_IS_VISIBLE(vc)) 865 return -EINVAL; 866 vga_set_palette(vc, table); 867 return 0; 868 #else 869 return -EINVAL; 870 #endif 871 } 872 873 /* structure holding original VGA register settings */ 874 static struct { 875 unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ 876 unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ 877 unsigned char CrtMiscIO; /* Miscellaneous register */ 878 unsigned char HorizontalTotal; /* CRT-Controller:00h */ 879 unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ 880 unsigned char StartHorizRetrace; /* CRT-Controller:04h */ 881 unsigned char EndHorizRetrace; /* CRT-Controller:05h */ 882 unsigned char Overflow; /* CRT-Controller:07h */ 883 unsigned char StartVertRetrace; /* CRT-Controller:10h */ 884 unsigned char EndVertRetrace; /* CRT-Controller:11h */ 885 unsigned char ModeControl; /* CRT-Controller:17h */ 886 unsigned char ClockingMode; /* Seq-Controller:01h */ 887 } vga_state; 888 889 static void vga_vesa_blank(struct vgastate *state, int mode) 890 { 891 /* save original values of VGA controller registers */ 892 if (!vga_vesa_blanked) { 893 spin_lock_irq(&vga_lock); 894 vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I); 895 vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg); 896 vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R); 897 spin_unlock_irq(&vga_lock); 898 899 outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ 900 vga_state.HorizontalTotal = inb_p(vga_video_port_val); 901 outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ 902 vga_state.HorizDisplayEnd = inb_p(vga_video_port_val); 903 outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ 904 vga_state.StartHorizRetrace = inb_p(vga_video_port_val); 905 outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ 906 vga_state.EndHorizRetrace = inb_p(vga_video_port_val); 907 outb_p(0x07, vga_video_port_reg); /* Overflow */ 908 vga_state.Overflow = inb_p(vga_video_port_val); 909 outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ 910 vga_state.StartVertRetrace = inb_p(vga_video_port_val); 911 outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ 912 vga_state.EndVertRetrace = inb_p(vga_video_port_val); 913 outb_p(0x17, vga_video_port_reg); /* ModeControl */ 914 vga_state.ModeControl = inb_p(vga_video_port_val); 915 vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); 916 } 917 918 /* assure that video is enabled */ 919 /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ 920 spin_lock_irq(&vga_lock); 921 vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20); 922 923 /* test for vertical retrace in process.... */ 924 if ((vga_state.CrtMiscIO & 0x80) == 0x80) 925 vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF); 926 927 /* 928 * Set <End of vertical retrace> to minimum (0) and 929 * <Start of vertical Retrace> to maximum (incl. overflow) 930 * Result: turn off vertical sync (VSync) pulse. 931 */ 932 if (mode & VESA_VSYNC_SUSPEND) { 933 outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ 934 outb_p(0xff, vga_video_port_val); /* maximum value */ 935 outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ 936 outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */ 937 outb_p(0x07, vga_video_port_reg); /* Overflow */ 938 outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */ 939 } 940 941 if (mode & VESA_HSYNC_SUSPEND) { 942 /* 943 * Set <End of horizontal retrace> to minimum (0) and 944 * <Start of horizontal Retrace> to maximum 945 * Result: turn off horizontal sync (HSync) pulse. 946 */ 947 outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ 948 outb_p(0xff, vga_video_port_val); /* maximum */ 949 outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ 950 outb_p(0x00, vga_video_port_val); /* minimum (0) */ 951 } 952 953 /* restore both index registers */ 954 vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); 955 outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); 956 spin_unlock_irq(&vga_lock); 957 } 958 959 static void vga_vesa_unblank(struct vgastate *state) 960 { 961 /* restore original values of VGA controller registers */ 962 spin_lock_irq(&vga_lock); 963 vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO); 964 965 outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ 966 outb_p(vga_state.HorizontalTotal, vga_video_port_val); 967 outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ 968 outb_p(vga_state.HorizDisplayEnd, vga_video_port_val); 969 outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ 970 outb_p(vga_state.StartHorizRetrace, vga_video_port_val); 971 outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ 972 outb_p(vga_state.EndHorizRetrace, vga_video_port_val); 973 outb_p(0x07, vga_video_port_reg); /* Overflow */ 974 outb_p(vga_state.Overflow, vga_video_port_val); 975 outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ 976 outb_p(vga_state.StartVertRetrace, vga_video_port_val); 977 outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ 978 outb_p(vga_state.EndVertRetrace, vga_video_port_val); 979 outb_p(0x17, vga_video_port_reg); /* ModeControl */ 980 outb_p(vga_state.ModeControl, vga_video_port_val); 981 /* ClockingMode */ 982 vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode); 983 984 /* restore index/control registers */ 985 vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); 986 outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); 987 spin_unlock_irq(&vga_lock); 988 } 989 990 static void vga_pal_blank(struct vgastate *state) 991 { 992 int i; 993 994 vga_w(state->vgabase, VGA_PEL_MSK, 0xff); 995 for (i = 0; i < 16; i++) { 996 vga_w(state->vgabase, VGA_PEL_IW, i); 997 vga_w(state->vgabase, VGA_PEL_D, 0); 998 vga_w(state->vgabase, VGA_PEL_D, 0); 999 vga_w(state->vgabase, VGA_PEL_D, 0); 1000 } 1001 } 1002 1003 static int vgacon_blank(struct vc_data *c, int blank, int mode_switch) 1004 { 1005 switch (blank) { 1006 case 0: /* Unblank */ 1007 if (vga_vesa_blanked) { 1008 vga_vesa_unblank(&state); 1009 vga_vesa_blanked = 0; 1010 } 1011 if (vga_palette_blanked) { 1012 vga_set_palette(c, color_table); 1013 vga_palette_blanked = 0; 1014 return 0; 1015 } 1016 vga_is_gfx = 0; 1017 /* Tell console.c that it has to restore the screen itself */ 1018 return 1; 1019 case 1: /* Normal blanking */ 1020 case -1: /* Obsolete */ 1021 if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { 1022 vga_pal_blank(&state); 1023 vga_palette_blanked = 1; 1024 return 0; 1025 } 1026 vgacon_set_origin(c); 1027 scr_memsetw((void *) vga_vram_base, BLANK, 1028 c->vc_screenbuf_size); 1029 if (mode_switch) 1030 vga_is_gfx = 1; 1031 return 1; 1032 default: /* VESA blanking */ 1033 if (vga_video_type == VIDEO_TYPE_VGAC) { 1034 vga_vesa_blank(&state, blank - 1); 1035 vga_vesa_blanked = blank; 1036 } 1037 return 0; 1038 } 1039 } 1040 1041 /* 1042 * PIO_FONT support. 1043 * 1044 * The font loading code goes back to the codepage package by 1045 * Joel Hoffman (joel@wam.umd.edu). (He reports that the original 1046 * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 1047 * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) 1048 * 1049 * Change for certain monochrome monitors by Yury Shevchuck 1050 * (sizif@botik.yaroslavl.su). 1051 */ 1052 1053 #ifdef CAN_LOAD_EGA_FONTS 1054 1055 #define colourmap 0xa0000 1056 /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we 1057 should use 0xA0000 for the bwmap as well.. */ 1058 #define blackwmap 0xa0000 1059 #define cmapsz 8192 1060 1061 static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512) 1062 { 1063 unsigned short video_port_status = vga_video_port_reg + 6; 1064 int font_select = 0x00, beg, i; 1065 char *charmap; 1066 1067 if (vga_video_type != VIDEO_TYPE_EGAM) { 1068 charmap = (char *) VGA_MAP_MEM(colourmap, 0); 1069 beg = 0x0e; 1070 #ifdef VGA_CAN_DO_64KB 1071 if (vga_video_type == VIDEO_TYPE_VGAC) 1072 beg = 0x06; 1073 #endif 1074 } else { 1075 charmap = (char *) VGA_MAP_MEM(blackwmap, 0); 1076 beg = 0x0a; 1077 } 1078 1079 #ifdef BROKEN_GRAPHICS_PROGRAMS 1080 /* 1081 * All fonts are loaded in slot 0 (0:1 for 512 ch) 1082 */ 1083 1084 if (!arg) 1085 return -EINVAL; /* Return to default font not supported */ 1086 1087 vga_font_is_default = 0; 1088 font_select = ch512 ? 0x04 : 0x00; 1089 #else 1090 /* 1091 * The default font is kept in slot 0 and is never touched. 1092 * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch) 1093 */ 1094 1095 if (set) { 1096 vga_font_is_default = !arg; 1097 if (!arg) 1098 ch512 = 0; /* Default font is always 256 */ 1099 font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00; 1100 } 1101 1102 if (!vga_font_is_default) 1103 charmap += 4 * cmapsz; 1104 #endif 1105 1106 unlock_kernel(); 1107 spin_lock_irq(&vga_lock); 1108 /* First, the Sequencer */ 1109 vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); 1110 /* CPU writes only to map 2 */ 1111 vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04); 1112 /* Sequential addressing */ 1113 vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07); 1114 /* Clear synchronous reset */ 1115 vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); 1116 1117 /* Now, the graphics controller, select map 2 */ 1118 vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02); 1119 /* disable odd-even addressing */ 1120 vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00); 1121 /* map start at A000:0000 */ 1122 vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00); 1123 spin_unlock_irq(&vga_lock); 1124 1125 if (arg) { 1126 if (set) 1127 for (i = 0; i < cmapsz; i++) 1128 vga_writeb(arg[i], charmap + i); 1129 else 1130 for (i = 0; i < cmapsz; i++) 1131 arg[i] = vga_readb(charmap + i); 1132 1133 /* 1134 * In 512-character mode, the character map is not contiguous if 1135 * we want to remain EGA compatible -- which we do 1136 */ 1137 1138 if (ch512) { 1139 charmap += 2 * cmapsz; 1140 arg += cmapsz; 1141 if (set) 1142 for (i = 0; i < cmapsz; i++) 1143 vga_writeb(arg[i], charmap + i); 1144 else 1145 for (i = 0; i < cmapsz; i++) 1146 arg[i] = vga_readb(charmap + i); 1147 } 1148 } 1149 1150 spin_lock_irq(&vga_lock); 1151 /* First, the sequencer, Synchronous reset */ 1152 vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); 1153 /* CPU writes to maps 0 and 1 */ 1154 vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03); 1155 /* odd-even addressing */ 1156 vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03); 1157 /* Character Map Select */ 1158 if (set) 1159 vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select); 1160 /* clear synchronous reset */ 1161 vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); 1162 1163 /* Now, the graphics controller, select map 0 for CPU */ 1164 vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00); 1165 /* enable even-odd addressing */ 1166 vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10); 1167 /* map starts at b800:0 or b000:0 */ 1168 vga_wgfx(state->vgabase, VGA_GFX_MISC, beg); 1169 1170 /* if 512 char mode is already enabled don't re-enable it. */ 1171 if ((set) && (ch512 != vga_512_chars)) { 1172 /* attribute controller */ 1173 for (i = 0; i < MAX_NR_CONSOLES; i++) { 1174 struct vc_data *c = vc_cons[i].d; 1175 if (c && c->vc_sw == &vga_con) 1176 c->vc_hi_font_mask = ch512 ? 0x0800 : 0; 1177 } 1178 vga_512_chars = ch512; 1179 /* 256-char: enable intensity bit 1180 512-char: disable intensity bit */ 1181 inb_p(video_port_status); /* clear address flip-flop */ 1182 /* color plane enable register */ 1183 vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f); 1184 /* Wilton (1987) mentions the following; I don't know what 1185 it means, but it works, and it appears necessary */ 1186 inb_p(video_port_status); 1187 vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); 1188 } 1189 spin_unlock_irq(&vga_lock); 1190 lock_kernel(); 1191 return 0; 1192 } 1193 1194 /* 1195 * Adjust the screen to fit a font of a certain height 1196 */ 1197 static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) 1198 { 1199 unsigned char ovr, vde, fsr; 1200 int rows, maxscan, i; 1201 1202 rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ 1203 maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ 1204 1205 /* Reprogram the CRTC for the new font size 1206 Note: the attempt to read the overflow register will fail 1207 on an EGA, but using 0xff for the previous value appears to 1208 be OK for EGA text modes in the range 257-512 scan lines, so I 1209 guess we don't need to worry about it. 1210 1211 The same applies for the spill bits in the font size and cursor 1212 registers; they are write-only on EGA, but it appears that they 1213 are all don't care bits on EGA, so I guess it doesn't matter. */ 1214 1215 spin_lock_irq(&vga_lock); 1216 outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ 1217 ovr = inb_p(vga_video_port_val); 1218 outb_p(0x09, vga_video_port_reg); /* Font size register */ 1219 fsr = inb_p(vga_video_port_val); 1220 spin_unlock_irq(&vga_lock); 1221 1222 vde = maxscan & 0xff; /* Vertical display end reg */ 1223 ovr = (ovr & 0xbd) + /* Overflow register */ 1224 ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); 1225 fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ 1226 1227 spin_lock_irq(&vga_lock); 1228 outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ 1229 outb_p(ovr, vga_video_port_val); 1230 outb_p(0x09, vga_video_port_reg); /* Font size */ 1231 outb_p(fsr, vga_video_port_val); 1232 outb_p(0x12, vga_video_port_reg); /* Vertical display limit */ 1233 outb_p(vde, vga_video_port_val); 1234 spin_unlock_irq(&vga_lock); 1235 vga_video_font_height = fontheight; 1236 1237 for (i = 0; i < MAX_NR_CONSOLES; i++) { 1238 struct vc_data *c = vc_cons[i].d; 1239 1240 if (c && c->vc_sw == &vga_con) { 1241 if (CON_IS_VISIBLE(c)) { 1242 /* void size to cause regs to be rewritten */ 1243 cursor_size_lastfrom = 0; 1244 cursor_size_lastto = 0; 1245 c->vc_sw->con_cursor(c, CM_DRAW); 1246 } 1247 c->vc_font.height = fontheight; 1248 vc_resize(c, 0, rows); /* Adjust console size */ 1249 } 1250 } 1251 return 0; 1252 } 1253 1254 static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags) 1255 { 1256 unsigned charcount = font->charcount; 1257 int rc; 1258 1259 if (vga_video_type < VIDEO_TYPE_EGAM) 1260 return -EINVAL; 1261 1262 if (font->width != VGA_FONTWIDTH || 1263 (charcount != 256 && charcount != 512)) 1264 return -EINVAL; 1265 1266 rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512); 1267 if (rc) 1268 return rc; 1269 1270 if (!(flags & KD_FONT_FLAG_DONT_RECALC)) 1271 rc = vgacon_adjust_height(c, font->height); 1272 return rc; 1273 } 1274 1275 static int vgacon_font_get(struct vc_data *c, struct console_font *font) 1276 { 1277 if (vga_video_type < VIDEO_TYPE_EGAM) 1278 return -EINVAL; 1279 1280 font->width = VGA_FONTWIDTH; 1281 font->height = c->vc_font.height; 1282 font->charcount = vga_512_chars ? 512 : 256; 1283 if (!font->data) 1284 return 0; 1285 return vgacon_do_font_op(&state, font->data, 0, vga_512_chars); 1286 } 1287 1288 #else 1289 1290 #define vgacon_font_set NULL 1291 #define vgacon_font_get NULL 1292 1293 #endif 1294 1295 static int vgacon_resize(struct vc_data *c, unsigned int width, 1296 unsigned int height, unsigned int user) 1297 { 1298 if (width % 2 || width > screen_info.orig_video_cols || 1299 height > (screen_info.orig_video_lines * vga_default_font_height)/ 1300 c->vc_font.height) 1301 /* let svgatextmode tinker with video timings and 1302 return success */ 1303 return (user) ? 0 : -EINVAL; 1304 1305 if (CON_IS_VISIBLE(c) && !vga_is_gfx) /* who knows */ 1306 vgacon_doresize(c, width, height); 1307 return 0; 1308 } 1309 1310 static int vgacon_set_origin(struct vc_data *c) 1311 { 1312 if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ 1313 (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ 1314 return 0; 1315 c->vc_origin = c->vc_visible_origin = vga_vram_base; 1316 vga_set_mem_top(c); 1317 vga_rolled_over = 0; 1318 return 1; 1319 } 1320 1321 static void vgacon_save_screen(struct vc_data *c) 1322 { 1323 static int vga_bootup_console = 0; 1324 1325 if (!vga_bootup_console) { 1326 /* This is a gross hack, but here is the only place we can 1327 * set bootup console parameters without messing up generic 1328 * console initialization routines. 1329 */ 1330 vga_bootup_console = 1; 1331 c->vc_x = screen_info.orig_x; 1332 c->vc_y = screen_info.orig_y; 1333 } 1334 1335 /* We can't copy in more than the size of the video buffer, 1336 * or we'll be copying in VGA BIOS */ 1337 1338 if (!vga_is_gfx) 1339 scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, 1340 c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); 1341 } 1342 1343 static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, 1344 int lines) 1345 { 1346 unsigned long oldo; 1347 unsigned int delta; 1348 1349 if (t || b != c->vc_rows || vga_is_gfx || c->vc_mode != KD_TEXT) 1350 return 0; 1351 1352 if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) 1353 return 0; 1354 1355 vgacon_restore_screen(c); 1356 oldo = c->vc_origin; 1357 delta = lines * c->vc_size_row; 1358 if (dir == SM_UP) { 1359 vgacon_scrollback_update(c, t, lines); 1360 if (c->vc_scr_end + delta >= vga_vram_end) { 1361 scr_memcpyw((u16 *) vga_vram_base, 1362 (u16 *) (oldo + delta), 1363 c->vc_screenbuf_size - delta); 1364 c->vc_origin = vga_vram_base; 1365 vga_rolled_over = oldo - vga_vram_base; 1366 } else 1367 c->vc_origin += delta; 1368 scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - 1369 delta), c->vc_video_erase_char, 1370 delta); 1371 } else { 1372 if (oldo - delta < vga_vram_base) { 1373 scr_memmovew((u16 *) (vga_vram_end - 1374 c->vc_screenbuf_size + 1375 delta), (u16 *) oldo, 1376 c->vc_screenbuf_size - delta); 1377 c->vc_origin = vga_vram_end - c->vc_screenbuf_size; 1378 vga_rolled_over = 0; 1379 } else 1380 c->vc_origin -= delta; 1381 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; 1382 scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, 1383 delta); 1384 } 1385 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; 1386 c->vc_visible_origin = c->vc_origin; 1387 vga_set_mem_top(c); 1388 c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; 1389 return 1; 1390 } 1391 1392 1393 /* 1394 * The console `switch' structure for the VGA based console 1395 */ 1396 1397 static int vgacon_dummy(struct vc_data *c) 1398 { 1399 return 0; 1400 } 1401 1402 #define DUMMY (void *) vgacon_dummy 1403 1404 const struct consw vga_con = { 1405 .owner = THIS_MODULE, 1406 .con_startup = vgacon_startup, 1407 .con_init = vgacon_init, 1408 .con_deinit = vgacon_deinit, 1409 .con_clear = DUMMY, 1410 .con_putc = DUMMY, 1411 .con_putcs = DUMMY, 1412 .con_cursor = vgacon_cursor, 1413 .con_scroll = vgacon_scroll, 1414 .con_bmove = DUMMY, 1415 .con_switch = vgacon_switch, 1416 .con_blank = vgacon_blank, 1417 .con_font_set = vgacon_font_set, 1418 .con_font_get = vgacon_font_get, 1419 .con_resize = vgacon_resize, 1420 .con_set_palette = vgacon_set_palette, 1421 .con_scrolldelta = vgacon_scrolldelta, 1422 .con_set_origin = vgacon_set_origin, 1423 .con_save_screen = vgacon_save_screen, 1424 .con_build_attr = vgacon_build_attr, 1425 .con_invert_region = vgacon_invert_region, 1426 }; 1427 1428 MODULE_LICENSE("GPL"); 1429