Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/video/mdacon.c -- Low level MDA based console driver |
| 3 | * |
| 4 | * (c) 1998 Andrew Apted <ajapted@netspace.net.au> |
| 5 | * |
| 6 | * including portions (c) 1995-1998 Patrick Caulfield. |
| 7 | * |
| 8 | * slight improvements (c) 2000 Edward Betts <edward@debian.org> |
| 9 | * |
| 10 | * This file is based on the VGA console driver (vgacon.c): |
| 11 | * |
| 12 | * Created 28 Sep 1997 by Geert Uytterhoeven |
| 13 | * |
| 14 | * Rewritten by Martin Mares <mj@ucw.cz>, July 1998 |
| 15 | * |
| 16 | * and on the old console.c, vga.c and vesa_blank.c drivers: |
| 17 | * |
| 18 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 19 | * 1995 Jay Estabrook |
| 20 | * |
| 21 | * This file is subject to the terms and conditions of the GNU General Public |
| 22 | * License. See the file COPYING in the main directory of this archive for |
| 23 | * more details. |
| 24 | * |
| 25 | * Changelog: |
| 26 | * Paul G. (03/2001) Fix mdacon= boot prompt to use __setup(). |
| 27 | */ |
| 28 | |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/fs.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/tty.h> |
| 35 | #include <linux/console.h> |
| 36 | #include <linux/string.h> |
| 37 | #include <linux/kd.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/vt_kern.h> |
| 40 | #include <linux/vt_buffer.h> |
| 41 | #include <linux/selection.h> |
| 42 | #include <linux/spinlock.h> |
| 43 | #include <linux/ioport.h> |
| 44 | #include <linux/delay.h> |
| 45 | #include <linux/init.h> |
| 46 | |
| 47 | #include <asm/io.h> |
| 48 | #include <asm/vga.h> |
| 49 | |
| 50 | static DEFINE_SPINLOCK(mda_lock); |
| 51 | |
| 52 | /* description of the hardware layout */ |
| 53 | |
| 54 | static unsigned long mda_vram_base; /* Base of video memory */ |
| 55 | static unsigned long mda_vram_len; /* Size of video memory */ |
| 56 | static unsigned int mda_num_columns; /* Number of text columns */ |
| 57 | static unsigned int mda_num_lines; /* Number of text lines */ |
| 58 | |
| 59 | static unsigned int mda_index_port; /* Register select port */ |
| 60 | static unsigned int mda_value_port; /* Register value port */ |
| 61 | static unsigned int mda_mode_port; /* Mode control port */ |
| 62 | static unsigned int mda_status_port; /* Status and Config port */ |
| 63 | static unsigned int mda_gfx_port; /* Graphics control port */ |
| 64 | |
| 65 | /* current hardware state */ |
| 66 | |
| 67 | static int mda_cursor_loc=-1; |
| 68 | static int mda_cursor_size_from=-1; |
| 69 | static int mda_cursor_size_to=-1; |
| 70 | |
| 71 | static enum { TYPE_MDA, TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } mda_type; |
| 72 | static char *mda_type_name; |
| 73 | |
| 74 | /* console information */ |
| 75 | |
| 76 | static int mda_first_vc = 1; |
| 77 | static int mda_last_vc = 16; |
| 78 | |
| 79 | static struct vc_data *mda_display_fg = NULL; |
| 80 | |
| 81 | module_param(mda_first_vc, int, 0); |
| 82 | module_param(mda_last_vc, int, 0); |
| 83 | |
| 84 | /* MDA register values |
| 85 | */ |
| 86 | |
| 87 | #define MDA_CURSOR_BLINKING 0x00 |
| 88 | #define MDA_CURSOR_OFF 0x20 |
| 89 | #define MDA_CURSOR_SLOWBLINK 0x60 |
| 90 | |
| 91 | #define MDA_MODE_GRAPHICS 0x02 |
| 92 | #define MDA_MODE_VIDEO_EN 0x08 |
| 93 | #define MDA_MODE_BLINK_EN 0x20 |
| 94 | #define MDA_MODE_GFX_PAGE1 0x80 |
| 95 | |
| 96 | #define MDA_STATUS_HSYNC 0x01 |
| 97 | #define MDA_STATUS_VSYNC 0x80 |
| 98 | #define MDA_STATUS_VIDEO 0x08 |
| 99 | |
| 100 | #define MDA_CONFIG_COL132 0x08 |
| 101 | #define MDA_GFX_MODE_EN 0x01 |
| 102 | #define MDA_GFX_PAGE_EN 0x02 |
| 103 | |
| 104 | |
| 105 | /* |
| 106 | * MDA could easily be classified as "pre-dinosaur hardware". |
| 107 | */ |
| 108 | |
| 109 | static void write_mda_b(unsigned int val, unsigned char reg) |
| 110 | { |
| 111 | unsigned long flags; |
| 112 | |
| 113 | spin_lock_irqsave(&mda_lock, flags); |
| 114 | |
| 115 | outb_p(reg, mda_index_port); |
| 116 | outb_p(val, mda_value_port); |
| 117 | |
| 118 | spin_unlock_irqrestore(&mda_lock, flags); |
| 119 | } |
| 120 | |
| 121 | static void write_mda_w(unsigned int val, unsigned char reg) |
| 122 | { |
| 123 | unsigned long flags; |
| 124 | |
| 125 | spin_lock_irqsave(&mda_lock, flags); |
| 126 | |
| 127 | outb_p(reg, mda_index_port); outb_p(val >> 8, mda_value_port); |
| 128 | outb_p(reg+1, mda_index_port); outb_p(val & 0xff, mda_value_port); |
| 129 | |
| 130 | spin_unlock_irqrestore(&mda_lock, flags); |
| 131 | } |
| 132 | |
| 133 | #ifdef TEST_MDA_B |
| 134 | static int test_mda_b(unsigned char val, unsigned char reg) |
| 135 | { |
| 136 | unsigned long flags; |
| 137 | |
| 138 | spin_lock_irqsave(&mda_lock, flags); |
| 139 | |
| 140 | outb_p(reg, mda_index_port); |
| 141 | outb (val, mda_value_port); |
| 142 | |
| 143 | udelay(20); val = (inb_p(mda_value_port) == val); |
| 144 | |
| 145 | spin_unlock_irqrestore(&mda_lock, flags); |
| 146 | return val; |
| 147 | } |
| 148 | #endif |
| 149 | |
| 150 | static inline void mda_set_cursor(unsigned int location) |
| 151 | { |
| 152 | if (mda_cursor_loc == location) |
| 153 | return; |
| 154 | |
| 155 | write_mda_w(location >> 1, 0x0e); |
| 156 | |
| 157 | mda_cursor_loc = location; |
| 158 | } |
| 159 | |
| 160 | static inline void mda_set_cursor_size(int from, int to) |
| 161 | { |
| 162 | if (mda_cursor_size_from==from && mda_cursor_size_to==to) |
| 163 | return; |
| 164 | |
| 165 | if (from > to) { |
| 166 | write_mda_b(MDA_CURSOR_OFF, 0x0a); /* disable cursor */ |
| 167 | } else { |
| 168 | write_mda_b(from, 0x0a); /* cursor start */ |
| 169 | write_mda_b(to, 0x0b); /* cursor end */ |
| 170 | } |
| 171 | |
| 172 | mda_cursor_size_from = from; |
| 173 | mda_cursor_size_to = to; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | #ifndef MODULE |
| 178 | static int __init mdacon_setup(char *str) |
| 179 | { |
| 180 | /* command line format: mdacon=<first>,<last> */ |
| 181 | |
| 182 | int ints[3]; |
| 183 | |
| 184 | str = get_options(str, ARRAY_SIZE(ints), ints); |
| 185 | |
| 186 | if (ints[0] < 2) |
| 187 | return 0; |
| 188 | |
| 189 | if (ints[1] < 1 || ints[1] > MAX_NR_CONSOLES || |
| 190 | ints[2] < 1 || ints[2] > MAX_NR_CONSOLES) |
| 191 | return 0; |
| 192 | |
| 193 | mda_first_vc = ints[1]; |
| 194 | mda_last_vc = ints[2]; |
| 195 | return 1; |
| 196 | } |
| 197 | |
| 198 | __setup("mdacon=", mdacon_setup); |
| 199 | #endif |
| 200 | |
| 201 | static int __init mda_detect(void) |
| 202 | { |
| 203 | int count=0; |
| 204 | u16 *p, p_save; |
| 205 | u16 *q, q_save; |
| 206 | |
| 207 | /* do a memory check */ |
| 208 | |
| 209 | p = (u16 *) mda_vram_base; |
| 210 | q = (u16 *) (mda_vram_base + 0x01000); |
| 211 | |
| 212 | p_save = scr_readw(p); q_save = scr_readw(q); |
| 213 | |
| 214 | scr_writew(0xAA55, p); if (scr_readw(p) == 0xAA55) count++; |
| 215 | scr_writew(0x55AA, p); if (scr_readw(p) == 0x55AA) count++; |
| 216 | scr_writew(p_save, p); |
| 217 | |
| 218 | if (count != 2) { |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | /* check if we have 4K or 8K */ |
| 223 | |
| 224 | scr_writew(0xA55A, q); scr_writew(0x0000, p); |
| 225 | if (scr_readw(q) == 0xA55A) count++; |
| 226 | |
| 227 | scr_writew(0x5AA5, q); scr_writew(0x0000, p); |
| 228 | if (scr_readw(q) == 0x5AA5) count++; |
| 229 | |
| 230 | scr_writew(p_save, p); scr_writew(q_save, q); |
| 231 | |
| 232 | if (count == 4) { |
| 233 | mda_vram_len = 0x02000; |
| 234 | } |
| 235 | |
| 236 | /* Ok, there is definitely a card registering at the correct |
| 237 | * memory location, so now we do an I/O port test. |
| 238 | */ |
| 239 | |
| 240 | #ifdef TEST_MDA_B |
| 241 | /* Edward: These two mess `tests' mess up my cursor on bootup */ |
| 242 | |
| 243 | /* cursor low register */ |
| 244 | if (! test_mda_b(0x66, 0x0f)) { |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /* cursor low register */ |
| 249 | if (! test_mda_b(0x99, 0x0f)) { |
| 250 | return 0; |
| 251 | } |
| 252 | #endif |
| 253 | |
| 254 | /* See if the card is a Hercules, by checking whether the vsync |
| 255 | * bit of the status register is changing. This test lasts for |
| 256 | * approximately 1/10th of a second. |
| 257 | */ |
| 258 | |
| 259 | p_save = q_save = inb_p(mda_status_port) & MDA_STATUS_VSYNC; |
| 260 | |
| 261 | for (count=0; count < 50000 && p_save == q_save; count++) { |
| 262 | q_save = inb(mda_status_port) & MDA_STATUS_VSYNC; |
| 263 | udelay(2); |
| 264 | } |
| 265 | |
| 266 | if (p_save != q_save) { |
| 267 | switch (inb_p(mda_status_port) & 0x70) { |
| 268 | case 0x10: |
| 269 | mda_type = TYPE_HERCPLUS; |
| 270 | mda_type_name = "HerculesPlus"; |
| 271 | break; |
| 272 | case 0x50: |
| 273 | mda_type = TYPE_HERCCOLOR; |
| 274 | mda_type_name = "HerculesColor"; |
| 275 | break; |
| 276 | default: |
| 277 | mda_type = TYPE_HERC; |
| 278 | mda_type_name = "Hercules"; |
| 279 | break; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | return 1; |
| 284 | } |
| 285 | |
| 286 | static void __init mda_initialize(void) |
| 287 | { |
| 288 | write_mda_b(97, 0x00); /* horizontal total */ |
| 289 | write_mda_b(80, 0x01); /* horizontal displayed */ |
| 290 | write_mda_b(82, 0x02); /* horizontal sync pos */ |
| 291 | write_mda_b(15, 0x03); /* horizontal sync width */ |
| 292 | |
| 293 | write_mda_b(25, 0x04); /* vertical total */ |
| 294 | write_mda_b(6, 0x05); /* vertical total adjust */ |
| 295 | write_mda_b(25, 0x06); /* vertical displayed */ |
| 296 | write_mda_b(25, 0x07); /* vertical sync pos */ |
| 297 | |
| 298 | write_mda_b(2, 0x08); /* interlace mode */ |
| 299 | write_mda_b(13, 0x09); /* maximum scanline */ |
| 300 | write_mda_b(12, 0x0a); /* cursor start */ |
| 301 | write_mda_b(13, 0x0b); /* cursor end */ |
| 302 | |
| 303 | write_mda_w(0x0000, 0x0c); /* start address */ |
| 304 | write_mda_w(0x0000, 0x0e); /* cursor location */ |
| 305 | |
| 306 | outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, mda_mode_port); |
| 307 | outb_p(0x00, mda_status_port); |
| 308 | outb_p(0x00, mda_gfx_port); |
| 309 | } |
| 310 | |
Antonino A. Daplas | ac08dae | 2006-06-26 00:27:15 -0700 | [diff] [blame] | 311 | static const char *mdacon_startup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
| 313 | mda_num_columns = 80; |
| 314 | mda_num_lines = 25; |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | mda_vram_len = 0x01000; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 317 | mda_vram_base = VGA_MAP_MEM(0xb0000, mda_vram_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
| 319 | mda_index_port = 0x3b4; |
| 320 | mda_value_port = 0x3b5; |
| 321 | mda_mode_port = 0x3b8; |
| 322 | mda_status_port = 0x3ba; |
| 323 | mda_gfx_port = 0x3bf; |
| 324 | |
| 325 | mda_type = TYPE_MDA; |
| 326 | mda_type_name = "MDA"; |
| 327 | |
| 328 | if (! mda_detect()) { |
| 329 | printk("mdacon: MDA card not detected.\n"); |
| 330 | return NULL; |
| 331 | } |
| 332 | |
| 333 | if (mda_type != TYPE_MDA) { |
| 334 | mda_initialize(); |
| 335 | } |
| 336 | |
| 337 | /* cursor looks ugly during boot-up, so turn it off */ |
| 338 | mda_set_cursor(mda_vram_len - 1); |
| 339 | |
| 340 | printk("mdacon: %s with %ldK of memory detected.\n", |
| 341 | mda_type_name, mda_vram_len/1024); |
| 342 | |
| 343 | return "MDA-2"; |
| 344 | } |
| 345 | |
| 346 | static void mdacon_init(struct vc_data *c, int init) |
| 347 | { |
| 348 | c->vc_complement_mask = 0x0800; /* reverse video */ |
| 349 | c->vc_display_fg = &mda_display_fg; |
| 350 | |
| 351 | if (init) { |
| 352 | c->vc_cols = mda_num_columns; |
| 353 | c->vc_rows = mda_num_lines; |
| 354 | } else |
| 355 | vc_resize(c, mda_num_columns, mda_num_lines); |
| 356 | |
| 357 | /* make the first MDA console visible */ |
| 358 | |
| 359 | if (mda_display_fg == NULL) |
| 360 | mda_display_fg = c; |
| 361 | } |
| 362 | |
| 363 | static void mdacon_deinit(struct vc_data *c) |
| 364 | { |
| 365 | /* con_set_default_unimap(c->vc_num); */ |
| 366 | |
| 367 | if (mda_display_fg == c) |
| 368 | mda_display_fg = NULL; |
| 369 | } |
| 370 | |
| 371 | static inline u16 mda_convert_attr(u16 ch) |
| 372 | { |
| 373 | u16 attr = 0x0700; |
| 374 | |
| 375 | /* Underline and reverse-video are mutually exclusive on MDA. |
| 376 | * Since reverse-video is used for cursors and selected areas, |
| 377 | * it takes precedence. |
| 378 | */ |
| 379 | |
| 380 | if (ch & 0x0800) attr = 0x7000; /* reverse */ |
| 381 | else if (ch & 0x0400) attr = 0x0100; /* underline */ |
| 382 | |
| 383 | return ((ch & 0x0200) << 2) | /* intensity */ |
| 384 | (ch & 0x8000) | /* blink */ |
| 385 | (ch & 0x00ff) | attr; |
| 386 | } |
| 387 | |
| 388 | static u8 mdacon_build_attr(struct vc_data *c, u8 color, u8 intensity, |
| 389 | u8 blink, u8 underline, u8 reverse) |
| 390 | { |
| 391 | /* The attribute is just a bit vector: |
| 392 | * |
| 393 | * Bit 0..1 : intensity (0..2) |
| 394 | * Bit 2 : underline |
| 395 | * Bit 3 : reverse |
| 396 | * Bit 7 : blink |
| 397 | */ |
| 398 | |
| 399 | return (intensity & 3) | |
| 400 | ((underline & 1) << 2) | |
| 401 | ((reverse & 1) << 3) | |
| 402 | ((blink & 1) << 7); |
| 403 | } |
| 404 | |
| 405 | static void mdacon_invert_region(struct vc_data *c, u16 *p, int count) |
| 406 | { |
| 407 | for (; count > 0; count--) { |
| 408 | scr_writew(scr_readw(p) ^ 0x0800, p); |
| 409 | p++; |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | #define MDA_ADDR(x,y) ((u16 *) mda_vram_base + (y)*mda_num_columns + (x)) |
| 414 | |
| 415 | static void mdacon_putc(struct vc_data *c, int ch, int y, int x) |
| 416 | { |
| 417 | scr_writew(mda_convert_attr(ch), MDA_ADDR(x, y)); |
| 418 | } |
| 419 | |
| 420 | static void mdacon_putcs(struct vc_data *c, const unsigned short *s, |
| 421 | int count, int y, int x) |
| 422 | { |
| 423 | u16 *dest = MDA_ADDR(x, y); |
| 424 | |
| 425 | for (; count > 0; count--) { |
| 426 | scr_writew(mda_convert_attr(scr_readw(s++)), dest++); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | static void mdacon_clear(struct vc_data *c, int y, int x, |
| 431 | int height, int width) |
| 432 | { |
| 433 | u16 *dest = MDA_ADDR(x, y); |
| 434 | u16 eattr = mda_convert_attr(c->vc_video_erase_char); |
| 435 | |
| 436 | if (width <= 0 || height <= 0) |
| 437 | return; |
| 438 | |
| 439 | if (x==0 && width==mda_num_columns) { |
| 440 | scr_memsetw(dest, eattr, height*width*2); |
| 441 | } else { |
| 442 | for (; height > 0; height--, dest+=mda_num_columns) |
| 443 | scr_memsetw(dest, eattr, width*2); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | static void mdacon_bmove(struct vc_data *c, int sy, int sx, |
| 448 | int dy, int dx, int height, int width) |
| 449 | { |
| 450 | u16 *src, *dest; |
| 451 | |
| 452 | if (width <= 0 || height <= 0) |
| 453 | return; |
| 454 | |
| 455 | if (sx==0 && dx==0 && width==mda_num_columns) { |
| 456 | scr_memmovew(MDA_ADDR(0,dy), MDA_ADDR(0,sy), height*width*2); |
| 457 | |
| 458 | } else if (dy < sy || (dy == sy && dx < sx)) { |
| 459 | src = MDA_ADDR(sx, sy); |
| 460 | dest = MDA_ADDR(dx, dy); |
| 461 | |
| 462 | for (; height > 0; height--) { |
| 463 | scr_memmovew(dest, src, width*2); |
| 464 | src += mda_num_columns; |
| 465 | dest += mda_num_columns; |
| 466 | } |
| 467 | } else { |
| 468 | src = MDA_ADDR(sx, sy+height-1); |
| 469 | dest = MDA_ADDR(dx, dy+height-1); |
| 470 | |
| 471 | for (; height > 0; height--) { |
| 472 | scr_memmovew(dest, src, width*2); |
| 473 | src -= mda_num_columns; |
| 474 | dest -= mda_num_columns; |
| 475 | } |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | static int mdacon_switch(struct vc_data *c) |
| 480 | { |
| 481 | return 1; /* redrawing needed */ |
| 482 | } |
| 483 | |
| 484 | static int mdacon_set_palette(struct vc_data *c, unsigned char *table) |
| 485 | { |
| 486 | return -EINVAL; |
| 487 | } |
| 488 | |
| 489 | static int mdacon_blank(struct vc_data *c, int blank, int mode_switch) |
| 490 | { |
| 491 | if (mda_type == TYPE_MDA) { |
| 492 | if (blank) |
| 493 | scr_memsetw((void *)mda_vram_base, |
| 494 | mda_convert_attr(c->vc_video_erase_char), |
| 495 | c->vc_screenbuf_size); |
| 496 | /* Tell console.c that it has to restore the screen itself */ |
| 497 | return 1; |
| 498 | } else { |
| 499 | if (blank) |
| 500 | outb_p(0x00, mda_mode_port); /* disable video */ |
| 501 | else |
| 502 | outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, |
| 503 | mda_mode_port); |
| 504 | return 0; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | static int mdacon_scrolldelta(struct vc_data *c, int lines) |
| 509 | { |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | static void mdacon_cursor(struct vc_data *c, int mode) |
| 514 | { |
| 515 | if (mode == CM_ERASE) { |
| 516 | mda_set_cursor(mda_vram_len - 1); |
| 517 | return; |
| 518 | } |
| 519 | |
| 520 | mda_set_cursor(c->vc_y*mda_num_columns*2 + c->vc_x*2); |
| 521 | |
| 522 | switch (c->vc_cursor_type & 0x0f) { |
| 523 | |
| 524 | case CUR_LOWER_THIRD: mda_set_cursor_size(10, 13); break; |
| 525 | case CUR_LOWER_HALF: mda_set_cursor_size(7, 13); break; |
| 526 | case CUR_TWO_THIRDS: mda_set_cursor_size(4, 13); break; |
| 527 | case CUR_BLOCK: mda_set_cursor_size(1, 13); break; |
| 528 | case CUR_NONE: mda_set_cursor_size(14, 13); break; |
| 529 | default: mda_set_cursor_size(12, 13); break; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | static int mdacon_scroll(struct vc_data *c, int t, int b, int dir, int lines) |
| 534 | { |
| 535 | u16 eattr = mda_convert_attr(c->vc_video_erase_char); |
| 536 | |
| 537 | if (!lines) |
| 538 | return 0; |
| 539 | |
| 540 | if (lines > c->vc_rows) /* maximum realistic size */ |
| 541 | lines = c->vc_rows; |
| 542 | |
| 543 | switch (dir) { |
| 544 | |
| 545 | case SM_UP: |
| 546 | scr_memmovew(MDA_ADDR(0,t), MDA_ADDR(0,t+lines), |
| 547 | (b-t-lines)*mda_num_columns*2); |
| 548 | scr_memsetw(MDA_ADDR(0,b-lines), eattr, |
| 549 | lines*mda_num_columns*2); |
| 550 | break; |
| 551 | |
| 552 | case SM_DOWN: |
| 553 | scr_memmovew(MDA_ADDR(0,t+lines), MDA_ADDR(0,t), |
| 554 | (b-t-lines)*mda_num_columns*2); |
| 555 | scr_memsetw(MDA_ADDR(0,t), eattr, lines*mda_num_columns*2); |
| 556 | break; |
| 557 | } |
| 558 | |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | |
| 563 | /* |
| 564 | * The console `switch' structure for the MDA based console |
| 565 | */ |
| 566 | |
| 567 | static const struct consw mda_con = { |
| 568 | .owner = THIS_MODULE, |
| 569 | .con_startup = mdacon_startup, |
| 570 | .con_init = mdacon_init, |
| 571 | .con_deinit = mdacon_deinit, |
| 572 | .con_clear = mdacon_clear, |
| 573 | .con_putc = mdacon_putc, |
| 574 | .con_putcs = mdacon_putcs, |
| 575 | .con_cursor = mdacon_cursor, |
| 576 | .con_scroll = mdacon_scroll, |
| 577 | .con_bmove = mdacon_bmove, |
| 578 | .con_switch = mdacon_switch, |
| 579 | .con_blank = mdacon_blank, |
| 580 | .con_set_palette = mdacon_set_palette, |
| 581 | .con_scrolldelta = mdacon_scrolldelta, |
| 582 | .con_build_attr = mdacon_build_attr, |
| 583 | .con_invert_region = mdacon_invert_region, |
| 584 | }; |
| 585 | |
| 586 | int __init mda_console_init(void) |
| 587 | { |
| 588 | if (mda_first_vc > mda_last_vc) |
| 589 | return 1; |
| 590 | |
| 591 | return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0); |
| 592 | } |
| 593 | |
| 594 | static void __exit mda_console_exit(void) |
| 595 | { |
| 596 | give_up_console(&mda_con); |
| 597 | } |
| 598 | |
| 599 | module_init(mda_console_init); |
| 600 | module_exit(mda_console_exit); |
| 601 | |
| 602 | MODULE_LICENSE("GPL"); |
| 603 | |