Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/config.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/sched.h> |
| 40 | #include <linux/fs.h> |
| 41 | #include <linux/kernel.h> |
| 42 | #include <linux/tty.h> |
| 43 | #include <linux/console.h> |
| 44 | #include <linux/string.h> |
| 45 | #include <linux/kd.h> |
| 46 | #include <linux/slab.h> |
| 47 | #include <linux/vt_kern.h> |
| 48 | #include <linux/selection.h> |
| 49 | #include <linux/spinlock.h> |
| 50 | #include <linux/ioport.h> |
| 51 | #include <linux/init.h> |
| 52 | #include <linux/smp_lock.h> |
| 53 | #include <video/vga.h> |
| 54 | #include <asm/io.h> |
| 55 | |
| 56 | static DEFINE_SPINLOCK(vga_lock); |
| 57 | static int cursor_size_lastfrom; |
| 58 | static int cursor_size_lastto; |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 59 | static u32 vgacon_xres; |
| 60 | static u32 vgacon_yres; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static struct vgastate state; |
| 62 | |
| 63 | #define BLANK 0x0020 |
| 64 | |
| 65 | #define CAN_LOAD_EGA_FONTS /* undefine if the user must not do this */ |
| 66 | #define CAN_LOAD_PALETTE /* undefine if the user must not do this */ |
| 67 | |
| 68 | /* You really do _NOT_ want to define this, unless you have buggy |
| 69 | * Trident VGA which will resize cursor when moving it between column |
| 70 | * 15 & 16. If you define this and your VGA is OK, inverse bug will |
| 71 | * appear. |
| 72 | */ |
| 73 | #undef TRIDENT_GLITCH |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 74 | #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* |
| 76 | * Interface used by the world |
| 77 | */ |
| 78 | |
| 79 | static const char *vgacon_startup(void); |
| 80 | static void vgacon_init(struct vc_data *c, int init); |
| 81 | static void vgacon_deinit(struct vc_data *c); |
| 82 | static void vgacon_cursor(struct vc_data *c, int mode); |
| 83 | static int vgacon_switch(struct vc_data *c); |
| 84 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch); |
| 85 | static int vgacon_set_palette(struct vc_data *vc, unsigned char *table); |
| 86 | static int vgacon_scrolldelta(struct vc_data *c, int lines); |
| 87 | static int vgacon_set_origin(struct vc_data *c); |
| 88 | static void vgacon_save_screen(struct vc_data *c); |
| 89 | static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, |
| 90 | int lines); |
| 91 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, |
| 92 | u8 blink, u8 underline, u8 reverse); |
| 93 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count); |
| 94 | static unsigned long vgacon_uni_pagedir[2]; |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | /* Description of the hardware situation */ |
| 97 | static unsigned long vga_vram_base; /* Base of video memory */ |
| 98 | static unsigned long vga_vram_end; /* End of video memory */ |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 99 | static int vga_vram_size; /* Size of video memory */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | static u16 vga_video_port_reg; /* Video register select port */ |
| 101 | static u16 vga_video_port_val; /* Video register value port */ |
| 102 | static unsigned int vga_video_num_columns; /* Number of text columns */ |
| 103 | static unsigned int vga_video_num_lines; /* Number of text lines */ |
| 104 | static int vga_can_do_color = 0; /* Do we support colors? */ |
| 105 | static unsigned int vga_default_font_height;/* Height of default screen font */ |
| 106 | static unsigned char vga_video_type; /* Card type */ |
| 107 | static unsigned char vga_hardscroll_enabled; |
| 108 | static unsigned char vga_hardscroll_user_enable = 1; |
| 109 | static unsigned char vga_font_is_default = 1; |
| 110 | static int vga_vesa_blanked; |
| 111 | static int vga_palette_blanked; |
| 112 | static int vga_is_gfx; |
| 113 | static int vga_512_chars; |
| 114 | static int vga_video_font_height; |
| 115 | static int vga_scan_lines; |
| 116 | static unsigned int vga_rolled_over = 0; |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 117 | static int vga_init_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | static int __init no_scroll(char *str) |
| 120 | { |
| 121 | /* |
| 122 | * Disabling scrollback is required for the Braillex ib80-piezo |
| 123 | * Braille reader made by F.H. Papenmeier (Germany). |
| 124 | * Use the "no-scroll" bootflag. |
| 125 | */ |
| 126 | vga_hardscroll_user_enable = vga_hardscroll_enabled = 0; |
| 127 | return 1; |
| 128 | } |
| 129 | |
| 130 | __setup("no-scroll", no_scroll); |
| 131 | |
| 132 | /* |
| 133 | * By replacing the four outb_p with two back to back outw, we can reduce |
| 134 | * the window of opportunity to see text mislocated to the RHS of the |
| 135 | * console during heavy scrolling activity. However there is the remote |
| 136 | * possibility that some pre-dinosaur hardware won't like the back to back |
| 137 | * I/O. Since the Xservers get away with it, we should be able to as well. |
| 138 | */ |
| 139 | static inline void write_vga(unsigned char reg, unsigned int val) |
| 140 | { |
| 141 | unsigned int v1, v2; |
| 142 | unsigned long flags; |
| 143 | |
| 144 | /* |
| 145 | * ddprintk might set the console position from interrupt |
| 146 | * handlers, thus the write has to be IRQ-atomic. |
| 147 | */ |
| 148 | spin_lock_irqsave(&vga_lock, flags); |
| 149 | |
| 150 | #ifndef SLOW_VGA |
| 151 | v1 = reg + (val & 0xff00); |
| 152 | v2 = reg + 1 + ((val << 8) & 0xff00); |
| 153 | outw(v1, vga_video_port_reg); |
| 154 | outw(v2, vga_video_port_reg); |
| 155 | #else |
| 156 | outb_p(reg, vga_video_port_reg); |
| 157 | outb_p(val >> 8, vga_video_port_val); |
| 158 | outb_p(reg + 1, vga_video_port_reg); |
| 159 | outb_p(val & 0xff, vga_video_port_val); |
| 160 | #endif |
| 161 | spin_unlock_irqrestore(&vga_lock, flags); |
| 162 | } |
| 163 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 164 | static inline void vga_set_mem_top(struct vc_data *c) |
| 165 | { |
| 166 | write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2); |
| 167 | } |
| 168 | |
| 169 | #ifdef CONFIG_VGACON_SOFT_SCROLLBACK |
| 170 | #include <linux/bootmem.h> |
| 171 | /* software scrollback */ |
| 172 | static void *vgacon_scrollback; |
| 173 | static int vgacon_scrollback_tail; |
| 174 | static int vgacon_scrollback_size; |
| 175 | static int vgacon_scrollback_rows; |
| 176 | static int vgacon_scrollback_cnt; |
| 177 | static int vgacon_scrollback_cur; |
| 178 | static int vgacon_scrollback_save; |
| 179 | static int vgacon_scrollback_restore; |
| 180 | |
| 181 | static void vgacon_scrollback_init(int pitch) |
| 182 | { |
| 183 | int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; |
| 184 | |
| 185 | if (vgacon_scrollback) { |
| 186 | vgacon_scrollback_cnt = 0; |
| 187 | vgacon_scrollback_tail = 0; |
| 188 | vgacon_scrollback_cur = 0; |
| 189 | vgacon_scrollback_rows = rows - 1; |
| 190 | vgacon_scrollback_size = rows * pitch; |
| 191 | } |
| 192 | } |
| 193 | |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 194 | static void vgacon_scrollback_startup(void) |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 195 | { |
| 196 | vgacon_scrollback = alloc_bootmem(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE |
| 197 | * 1024); |
| 198 | vgacon_scrollback_init(vga_video_num_columns * 2); |
| 199 | } |
| 200 | |
| 201 | static void vgacon_scrollback_update(struct vc_data *c, int t, int count) |
| 202 | { |
| 203 | void *p; |
| 204 | |
| 205 | if (!vgacon_scrollback_size || c->vc_num != fg_console) |
| 206 | return; |
| 207 | |
| 208 | p = (void *) (c->vc_origin + t * c->vc_size_row); |
| 209 | |
| 210 | while (count--) { |
| 211 | scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, |
| 212 | p, c->vc_size_row); |
| 213 | vgacon_scrollback_cnt++; |
| 214 | p += c->vc_size_row; |
| 215 | vgacon_scrollback_tail += c->vc_size_row; |
| 216 | |
| 217 | if (vgacon_scrollback_tail >= vgacon_scrollback_size) |
| 218 | vgacon_scrollback_tail = 0; |
| 219 | |
| 220 | if (vgacon_scrollback_cnt > vgacon_scrollback_rows) |
| 221 | vgacon_scrollback_cnt = vgacon_scrollback_rows; |
| 222 | |
| 223 | vgacon_scrollback_cur = vgacon_scrollback_cnt; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | static void vgacon_restore_screen(struct vc_data *c) |
| 228 | { |
| 229 | vgacon_scrollback_save = 0; |
| 230 | |
| 231 | if (!vga_is_gfx && !vgacon_scrollback_restore) { |
| 232 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
| 233 | c->vc_screenbuf_size > vga_vram_size ? |
| 234 | vga_vram_size : c->vc_screenbuf_size); |
| 235 | vgacon_scrollback_restore = 1; |
| 236 | vgacon_scrollback_cur = vgacon_scrollback_cnt; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | static int vgacon_scrolldelta(struct vc_data *c, int lines) |
| 241 | { |
| 242 | int start, end, count, soff, diff; |
| 243 | void *d, *s; |
| 244 | |
| 245 | if (!lines) { |
| 246 | c->vc_visible_origin = c->vc_origin; |
| 247 | vga_set_mem_top(c); |
| 248 | return 1; |
| 249 | } |
| 250 | |
| 251 | if (!vgacon_scrollback) |
| 252 | return 1; |
| 253 | |
| 254 | if (!vgacon_scrollback_save) { |
| 255 | vgacon_cursor(c, CM_ERASE); |
| 256 | vgacon_save_screen(c); |
| 257 | vgacon_scrollback_save = 1; |
| 258 | } |
| 259 | |
| 260 | vgacon_scrollback_restore = 0; |
| 261 | start = vgacon_scrollback_cur + lines; |
| 262 | end = start + abs(lines); |
| 263 | |
| 264 | if (start < 0) |
| 265 | start = 0; |
| 266 | |
| 267 | if (start > vgacon_scrollback_cnt) |
| 268 | start = vgacon_scrollback_cnt; |
| 269 | |
| 270 | if (end < 0) |
| 271 | end = 0; |
| 272 | |
| 273 | if (end > vgacon_scrollback_cnt) |
| 274 | end = vgacon_scrollback_cnt; |
| 275 | |
| 276 | vgacon_scrollback_cur = start; |
| 277 | count = end - start; |
| 278 | soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * |
| 279 | c->vc_size_row); |
| 280 | soff -= count * c->vc_size_row; |
| 281 | |
| 282 | if (soff < 0) |
| 283 | soff += vgacon_scrollback_size; |
| 284 | |
| 285 | count = vgacon_scrollback_cnt - start; |
| 286 | |
| 287 | if (count > c->vc_rows) |
| 288 | count = c->vc_rows; |
| 289 | |
| 290 | diff = c->vc_rows - count; |
| 291 | |
| 292 | d = (void *) c->vc_origin; |
| 293 | s = (void *) c->vc_screenbuf; |
| 294 | |
| 295 | while (count--) { |
| 296 | scr_memcpyw(d, vgacon_scrollback + soff, c->vc_size_row); |
| 297 | d += c->vc_size_row; |
| 298 | soff += c->vc_size_row; |
| 299 | |
| 300 | if (soff >= vgacon_scrollback_size) |
| 301 | soff = 0; |
| 302 | } |
| 303 | |
| 304 | if (diff == c->vc_rows) { |
| 305 | vgacon_cursor(c, CM_MOVE); |
| 306 | } else { |
| 307 | while (diff--) { |
| 308 | scr_memcpyw(d, s, c->vc_size_row); |
| 309 | d += c->vc_size_row; |
| 310 | s += c->vc_size_row; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | return 1; |
| 315 | } |
| 316 | #else |
| 317 | #define vgacon_scrollback_startup(...) do { } while (0) |
| 318 | #define vgacon_scrollback_init(...) do { } while (0) |
| 319 | #define vgacon_scrollback_update(...) do { } while (0) |
| 320 | |
| 321 | static void vgacon_restore_screen(struct vc_data *c) |
| 322 | { |
| 323 | if (c->vc_origin != c->vc_visible_origin) |
| 324 | vgacon_scrolldelta(c, 0); |
| 325 | } |
| 326 | |
| 327 | static int vgacon_scrolldelta(struct vc_data *c, int lines) |
| 328 | { |
| 329 | if (!lines) /* Turn scrollback off */ |
| 330 | c->vc_visible_origin = c->vc_origin; |
| 331 | else { |
| 332 | int margin = c->vc_size_row * 4; |
| 333 | int ul, we, p, st; |
| 334 | |
| 335 | if (vga_rolled_over > |
| 336 | (c->vc_scr_end - vga_vram_base) + margin) { |
| 337 | ul = c->vc_scr_end - vga_vram_base; |
| 338 | we = vga_rolled_over + c->vc_size_row; |
| 339 | } else { |
| 340 | ul = 0; |
| 341 | we = vga_vram_size; |
| 342 | } |
| 343 | p = (c->vc_visible_origin - vga_vram_base - ul + we) % we + |
| 344 | lines * c->vc_size_row; |
| 345 | st = (c->vc_origin - vga_vram_base - ul + we) % we; |
| 346 | if (st < 2 * margin) |
| 347 | margin = 0; |
| 348 | if (p < margin) |
| 349 | p = 0; |
| 350 | if (p > st - margin) |
| 351 | p = st; |
| 352 | c->vc_visible_origin = vga_vram_base + (p + ul) % we; |
| 353 | } |
| 354 | vga_set_mem_top(c); |
| 355 | return 1; |
| 356 | } |
| 357 | #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ |
| 358 | |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 359 | static const char *vgacon_startup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | { |
| 361 | const char *display_desc = NULL; |
| 362 | u16 saved1, saved2; |
| 363 | volatile u16 *p; |
| 364 | |
| 365 | if (ORIG_VIDEO_ISVGA == VIDEO_TYPE_VLFB) { |
| 366 | no_vga: |
| 367 | #ifdef CONFIG_DUMMY_CONSOLE |
| 368 | conswitchp = &dummy_con; |
| 369 | return conswitchp->con_startup(); |
| 370 | #else |
| 371 | return NULL; |
| 372 | #endif |
| 373 | } |
| 374 | |
| 375 | /* VGA16 modes are not handled by VGACON */ |
| 376 | if ((ORIG_VIDEO_MODE == 0x0D) || /* 320x200/4 */ |
| 377 | (ORIG_VIDEO_MODE == 0x0E) || /* 640x200/4 */ |
| 378 | (ORIG_VIDEO_MODE == 0x10) || /* 640x350/4 */ |
| 379 | (ORIG_VIDEO_MODE == 0x12) || /* 640x480/4 */ |
| 380 | (ORIG_VIDEO_MODE == 0x6A)) /* 800x600/4, 0x6A is very common */ |
| 381 | goto no_vga; |
| 382 | |
| 383 | vga_video_num_lines = ORIG_VIDEO_LINES; |
| 384 | vga_video_num_columns = ORIG_VIDEO_COLS; |
| 385 | state.vgabase = NULL; |
| 386 | |
| 387 | if (ORIG_VIDEO_MODE == 7) { /* Is this a monochrome display? */ |
| 388 | vga_vram_base = 0xb0000; |
| 389 | vga_video_port_reg = VGA_CRT_IM; |
| 390 | vga_video_port_val = VGA_CRT_DM; |
| 391 | if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) { |
| 392 | static struct resource ega_console_resource = |
| 393 | { "ega", 0x3B0, 0x3BF }; |
| 394 | vga_video_type = VIDEO_TYPE_EGAM; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 395 | vga_vram_size = 0x8000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | display_desc = "EGA+"; |
| 397 | request_resource(&ioport_resource, |
| 398 | &ega_console_resource); |
| 399 | } else { |
| 400 | static struct resource mda1_console_resource = |
| 401 | { "mda", 0x3B0, 0x3BB }; |
| 402 | static struct resource mda2_console_resource = |
| 403 | { "mda", 0x3BF, 0x3BF }; |
| 404 | vga_video_type = VIDEO_TYPE_MDA; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 405 | vga_vram_size = 0x2000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | display_desc = "*MDA"; |
| 407 | request_resource(&ioport_resource, |
| 408 | &mda1_console_resource); |
| 409 | request_resource(&ioport_resource, |
| 410 | &mda2_console_resource); |
| 411 | vga_video_font_height = 14; |
| 412 | } |
| 413 | } else { |
| 414 | /* If not, it is color. */ |
| 415 | vga_can_do_color = 1; |
| 416 | vga_vram_base = 0xb8000; |
| 417 | vga_video_port_reg = VGA_CRT_IC; |
| 418 | vga_video_port_val = VGA_CRT_DC; |
| 419 | if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) { |
| 420 | int i; |
| 421 | |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 422 | vga_vram_size = 0x8000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | if (!ORIG_VIDEO_ISVGA) { |
| 425 | static struct resource ega_console_resource |
| 426 | = { "ega", 0x3C0, 0x3DF }; |
| 427 | vga_video_type = VIDEO_TYPE_EGAC; |
| 428 | display_desc = "EGA"; |
| 429 | request_resource(&ioport_resource, |
| 430 | &ega_console_resource); |
| 431 | } else { |
| 432 | static struct resource vga_console_resource |
| 433 | = { "vga+", 0x3C0, 0x3DF }; |
| 434 | vga_video_type = VIDEO_TYPE_VGAC; |
| 435 | display_desc = "VGA+"; |
| 436 | request_resource(&ioport_resource, |
| 437 | &vga_console_resource); |
| 438 | |
| 439 | #ifdef VGA_CAN_DO_64KB |
| 440 | /* |
| 441 | * get 64K rather than 32K of video RAM. |
| 442 | * This doesn't actually work on all "VGA" |
| 443 | * controllers (it seems like setting MM=01 |
| 444 | * and COE=1 isn't necessarily a good idea) |
| 445 | */ |
| 446 | vga_vram_base = 0xa0000; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 447 | vga_vram_size = 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | outb_p(6, VGA_GFX_I); |
| 449 | outb_p(6, VGA_GFX_D); |
| 450 | #endif |
| 451 | /* |
| 452 | * Normalise the palette registers, to point |
| 453 | * the 16 screen colours to the first 16 |
| 454 | * DAC entries. |
| 455 | */ |
| 456 | |
| 457 | for (i = 0; i < 16; i++) { |
| 458 | inb_p(VGA_IS1_RC); |
| 459 | outb_p(i, VGA_ATT_W); |
| 460 | outb_p(i, VGA_ATT_W); |
| 461 | } |
| 462 | outb_p(0x20, VGA_ATT_W); |
| 463 | |
| 464 | /* |
| 465 | * Now set the DAC registers back to their |
| 466 | * default values |
| 467 | */ |
| 468 | for (i = 0; i < 16; i++) { |
| 469 | outb_p(color_table[i], VGA_PEL_IW); |
| 470 | outb_p(default_red[i], VGA_PEL_D); |
| 471 | outb_p(default_grn[i], VGA_PEL_D); |
| 472 | outb_p(default_blu[i], VGA_PEL_D); |
| 473 | } |
| 474 | } |
| 475 | } else { |
| 476 | static struct resource cga_console_resource = |
| 477 | { "cga", 0x3D4, 0x3D5 }; |
| 478 | vga_video_type = VIDEO_TYPE_CGA; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 479 | vga_vram_size = 0x2000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | display_desc = "*CGA"; |
| 481 | request_resource(&ioport_resource, |
| 482 | &cga_console_resource); |
| 483 | vga_video_font_height = 8; |
| 484 | } |
| 485 | } |
| 486 | |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 487 | vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); |
| 488 | vga_vram_end = vga_vram_base + vga_vram_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
| 490 | /* |
| 491 | * Find out if there is a graphics card present. |
| 492 | * Are there smarter methods around? |
| 493 | */ |
| 494 | p = (volatile u16 *) vga_vram_base; |
| 495 | saved1 = scr_readw(p); |
| 496 | saved2 = scr_readw(p + 1); |
| 497 | scr_writew(0xAA55, p); |
| 498 | scr_writew(0x55AA, p + 1); |
| 499 | if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { |
| 500 | scr_writew(saved1, p); |
| 501 | scr_writew(saved2, p + 1); |
| 502 | goto no_vga; |
| 503 | } |
| 504 | scr_writew(0x55AA, p); |
| 505 | scr_writew(0xAA55, p + 1); |
| 506 | if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { |
| 507 | scr_writew(saved1, p); |
| 508 | scr_writew(saved2, p + 1); |
| 509 | goto no_vga; |
| 510 | } |
| 511 | scr_writew(saved1, p); |
| 512 | scr_writew(saved2, p + 1); |
| 513 | |
| 514 | if (vga_video_type == VIDEO_TYPE_EGAC |
| 515 | || vga_video_type == VIDEO_TYPE_VGAC |
| 516 | || vga_video_type == VIDEO_TYPE_EGAM) { |
| 517 | vga_hardscroll_enabled = vga_hardscroll_user_enable; |
| 518 | vga_default_font_height = ORIG_VIDEO_POINTS; |
| 519 | vga_video_font_height = ORIG_VIDEO_POINTS; |
| 520 | /* This may be suboptimal but is a safe bet - go with it */ |
| 521 | vga_scan_lines = |
| 522 | vga_video_font_height * vga_video_num_lines; |
| 523 | } |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 524 | |
| 525 | vgacon_xres = ORIG_VIDEO_COLS * VGA_FONTWIDTH; |
| 526 | vgacon_yres = vga_scan_lines; |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 527 | |
| 528 | if (!vga_init_done) { |
| 529 | vgacon_scrollback_startup(); |
| 530 | vga_init_done = 1; |
| 531 | } |
| 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | return display_desc; |
| 534 | } |
| 535 | |
| 536 | static void vgacon_init(struct vc_data *c, int init) |
| 537 | { |
| 538 | unsigned long p; |
| 539 | |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 540 | /* |
| 541 | * We cannot be loaded as a module, therefore init is always 1, |
| 542 | * but vgacon_init can be called more than once, and init will |
| 543 | * not be 1. |
| 544 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | c->vc_can_do_color = vga_can_do_color; |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 546 | |
| 547 | /* set dimensions manually if init != 0 since vc_resize() will fail */ |
| 548 | if (init) { |
| 549 | c->vc_cols = vga_video_num_columns; |
| 550 | c->vc_rows = vga_video_num_lines; |
| 551 | } else |
| 552 | vc_resize(c, vga_video_num_columns, vga_video_num_lines); |
| 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | c->vc_scan_lines = vga_scan_lines; |
| 555 | c->vc_font.height = vga_video_font_height; |
| 556 | c->vc_complement_mask = 0x7700; |
Bill Nottingham | a40920b | 2005-05-01 08:59:07 -0700 | [diff] [blame] | 557 | if (vga_512_chars) |
| 558 | c->vc_hi_font_mask = 0x0800; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | p = *c->vc_uni_pagedir_loc; |
| 560 | if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir || |
| 561 | !--c->vc_uni_pagedir_loc[1]) |
| 562 | con_free_unimap(c); |
| 563 | c->vc_uni_pagedir_loc = vgacon_uni_pagedir; |
| 564 | vgacon_uni_pagedir[1]++; |
| 565 | if (!vgacon_uni_pagedir[0] && p) |
| 566 | con_set_default_unimap(c); |
| 567 | } |
| 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | static void vgacon_deinit(struct vc_data *c) |
| 570 | { |
| 571 | /* When closing the last console, reset video origin */ |
| 572 | if (!--vgacon_uni_pagedir[1]) { |
| 573 | c->vc_visible_origin = vga_vram_base; |
| 574 | vga_set_mem_top(c); |
| 575 | con_free_unimap(c); |
| 576 | } |
| 577 | c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; |
| 578 | con_set_default_unimap(c); |
| 579 | } |
| 580 | |
| 581 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, |
| 582 | u8 blink, u8 underline, u8 reverse) |
| 583 | { |
| 584 | u8 attr = color; |
| 585 | |
| 586 | if (vga_can_do_color) { |
| 587 | if (underline) |
| 588 | attr = (attr & 0xf0) | c->vc_ulcolor; |
| 589 | else if (intensity == 0) |
| 590 | attr = (attr & 0xf0) | c->vc_halfcolor; |
| 591 | } |
| 592 | if (reverse) |
| 593 | attr = |
| 594 | ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & |
| 595 | 0x77); |
| 596 | if (blink) |
| 597 | attr ^= 0x80; |
| 598 | if (intensity == 2) |
| 599 | attr ^= 0x08; |
| 600 | if (!vga_can_do_color) { |
| 601 | if (underline) |
| 602 | attr = (attr & 0xf8) | 0x01; |
| 603 | else if (intensity == 0) |
| 604 | attr = (attr & 0xf0) | 0x08; |
| 605 | } |
| 606 | return attr; |
| 607 | } |
| 608 | |
| 609 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) |
| 610 | { |
| 611 | int col = vga_can_do_color; |
| 612 | |
| 613 | while (count--) { |
| 614 | u16 a = scr_readw(p); |
| 615 | if (col) |
| 616 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | |
| 617 | (((a) & 0x0700) << 4); |
| 618 | else |
| 619 | a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; |
| 620 | scr_writew(a, p++); |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | static void vgacon_set_cursor_size(int xpos, int from, int to) |
| 625 | { |
| 626 | unsigned long flags; |
| 627 | int curs, cure; |
| 628 | |
| 629 | #ifdef TRIDENT_GLITCH |
| 630 | if (xpos < 16) |
| 631 | from--, to--; |
| 632 | #endif |
| 633 | |
| 634 | if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) |
| 635 | return; |
| 636 | cursor_size_lastfrom = from; |
| 637 | cursor_size_lastto = to; |
| 638 | |
| 639 | spin_lock_irqsave(&vga_lock, flags); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 640 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
| 641 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
| 642 | curs = inb_p(vga_video_port_val); |
| 643 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
| 644 | cure = inb_p(vga_video_port_val); |
| 645 | } else { |
| 646 | curs = 0; |
| 647 | cure = 0; |
| 648 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
| 650 | curs = (curs & 0xc0) | from; |
| 651 | cure = (cure & 0xe0) | to; |
| 652 | |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 653 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | outb_p(curs, vga_video_port_val); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 655 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | outb_p(cure, vga_video_port_val); |
| 657 | spin_unlock_irqrestore(&vga_lock, flags); |
| 658 | } |
| 659 | |
| 660 | static void vgacon_cursor(struct vc_data *c, int mode) |
| 661 | { |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 662 | vgacon_restore_screen(c); |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | switch (mode) { |
| 665 | case CM_ERASE: |
Samuel Thibault | 88dcb6c | 2005-11-05 22:19:50 +0100 | [diff] [blame] | 666 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 667 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
| 668 | vgacon_set_cursor_size(c->vc_x, 31, 30); |
| 669 | else |
| 670 | vgacon_set_cursor_size(c->vc_x, 31, 31); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | break; |
| 672 | |
| 673 | case CM_MOVE: |
| 674 | case CM_DRAW: |
| 675 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
| 676 | switch (c->vc_cursor_type & 0x0f) { |
| 677 | case CUR_UNDERLINE: |
| 678 | vgacon_set_cursor_size(c->vc_x, |
| 679 | c->vc_font.height - |
| 680 | (c->vc_font.height < |
| 681 | 10 ? 2 : 3), |
| 682 | c->vc_font.height - |
| 683 | (c->vc_font.height < |
| 684 | 10 ? 1 : 2)); |
| 685 | break; |
| 686 | case CUR_TWO_THIRDS: |
| 687 | vgacon_set_cursor_size(c->vc_x, |
| 688 | c->vc_font.height / 3, |
| 689 | c->vc_font.height - |
| 690 | (c->vc_font.height < |
| 691 | 10 ? 1 : 2)); |
| 692 | break; |
| 693 | case CUR_LOWER_THIRD: |
| 694 | vgacon_set_cursor_size(c->vc_x, |
| 695 | (c->vc_font.height * 2) / 3, |
| 696 | c->vc_font.height - |
| 697 | (c->vc_font.height < |
| 698 | 10 ? 1 : 2)); |
| 699 | break; |
| 700 | case CUR_LOWER_HALF: |
| 701 | vgacon_set_cursor_size(c->vc_x, |
| 702 | c->vc_font.height / 2, |
| 703 | c->vc_font.height - |
| 704 | (c->vc_font.height < |
| 705 | 10 ? 1 : 2)); |
| 706 | break; |
| 707 | case CUR_NONE: |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 708 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
| 709 | vgacon_set_cursor_size(c->vc_x, 31, 30); |
| 710 | else |
| 711 | vgacon_set_cursor_size(c->vc_x, 31, 31); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | break; |
| 713 | default: |
| 714 | vgacon_set_cursor_size(c->vc_x, 1, |
| 715 | c->vc_font.height); |
| 716 | break; |
| 717 | } |
| 718 | break; |
| 719 | } |
| 720 | } |
| 721 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 722 | static int vgacon_doresize(struct vc_data *c, |
| 723 | unsigned int width, unsigned int height) |
| 724 | { |
| 725 | unsigned long flags; |
| 726 | unsigned int scanlines = height * c->vc_font.height; |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 727 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 728 | |
| 729 | spin_lock_irqsave(&vga_lock, flags); |
| 730 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 731 | vgacon_xres = width * VGA_FONTWIDTH; |
| 732 | vgacon_yres = height * c->vc_font.height; |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 733 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
| 734 | outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); |
| 735 | max_scan = inb_p(vga_video_port_val); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 736 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 737 | if (max_scan & 0x80) |
| 738 | scanlines <<= 1; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 739 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 740 | outb_p(VGA_CRTC_MODE, vga_video_port_reg); |
| 741 | mode = inb_p(vga_video_port_val); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 742 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 743 | if (mode & 0x04) |
| 744 | scanlines >>= 1; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 745 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 746 | scanlines -= 1; |
| 747 | scanlines_lo = scanlines & 0xff; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 748 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 749 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); |
| 750 | r7 = inb_p(vga_video_port_val) & ~0x42; |
| 751 | |
| 752 | if (scanlines & 0x100) |
| 753 | r7 |= 0x02; |
| 754 | if (scanlines & 0x200) |
| 755 | r7 |= 0x40; |
| 756 | |
| 757 | /* deprotect registers */ |
| 758 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); |
| 759 | vsync_end = inb_p(vga_video_port_val); |
| 760 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); |
| 761 | outb_p(vsync_end & ~0x80, vga_video_port_val); |
| 762 | } |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 763 | |
| 764 | outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); |
| 765 | outb_p(width - 1, vga_video_port_val); |
| 766 | outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); |
| 767 | outb_p(width >> 1, vga_video_port_val); |
| 768 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 769 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
| 770 | outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); |
| 771 | outb_p(scanlines_lo, vga_video_port_val); |
| 772 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); |
| 773 | outb_p(r7,vga_video_port_val); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 774 | |
Samuel Thibault | d152126 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 775 | /* reprotect registers */ |
| 776 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); |
| 777 | outb_p(vsync_end, vga_video_port_val); |
| 778 | } |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 779 | |
| 780 | spin_unlock_irqrestore(&vga_lock, flags); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 781 | return 0; |
| 782 | } |
| 783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | static int vgacon_switch(struct vc_data *c) |
| 785 | { |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 786 | int x = c->vc_cols * VGA_FONTWIDTH; |
| 787 | int y = c->vc_rows * c->vc_font.height; |
| 788 | int rows = ORIG_VIDEO_LINES * vga_default_font_height/ |
| 789 | c->vc_font.height; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | /* |
| 791 | * We need to save screen size here as it's the only way |
| 792 | * we can spot the screen has been resized and we need to |
| 793 | * set size of freshly allocated screens ourselves. |
| 794 | */ |
| 795 | vga_video_num_columns = c->vc_cols; |
| 796 | vga_video_num_lines = c->vc_rows; |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 797 | |
| 798 | /* We can only copy out the size of the video buffer here, |
| 799 | * otherwise we get into VGA BIOS */ |
| 800 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 801 | if (!vga_is_gfx) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 803 | c->vc_screenbuf_size > vga_vram_size ? |
| 804 | vga_vram_size : c->vc_screenbuf_size); |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 805 | |
| 806 | if ((vgacon_xres != x || vgacon_yres != y) && |
| 807 | (!(vga_video_num_columns % 2) && |
| 808 | vga_video_num_columns <= ORIG_VIDEO_COLS && |
| 809 | vga_video_num_lines <= rows)) |
Samuel Thibault | 0aec486 | 2005-10-16 20:29:22 -0700 | [diff] [blame] | 810 | vgacon_doresize(c, c->vc_cols, c->vc_rows); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 811 | } |
| 812 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 813 | vgacon_scrollback_init(c->vc_size_row); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | return 0; /* Redrawing not needed */ |
| 815 | } |
| 816 | |
| 817 | static void vga_set_palette(struct vc_data *vc, unsigned char *table) |
| 818 | { |
| 819 | int i, j; |
| 820 | |
Pozsar Balazs | 1a66ddc | 2005-10-30 15:03:06 -0800 | [diff] [blame] | 821 | vga_w(state.vgabase, VGA_PEL_MSK, 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | for (i = j = 0; i < 16; i++) { |
| 823 | vga_w(state.vgabase, VGA_PEL_IW, table[i]); |
| 824 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); |
| 825 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); |
| 826 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | static int vgacon_set_palette(struct vc_data *vc, unsigned char *table) |
| 831 | { |
| 832 | #ifdef CAN_LOAD_PALETTE |
| 833 | if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked |
| 834 | || !CON_IS_VISIBLE(vc)) |
| 835 | return -EINVAL; |
| 836 | vga_set_palette(vc, table); |
| 837 | return 0; |
| 838 | #else |
| 839 | return -EINVAL; |
| 840 | #endif |
| 841 | } |
| 842 | |
| 843 | /* structure holding original VGA register settings */ |
| 844 | static struct { |
| 845 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ |
| 846 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ |
| 847 | unsigned char CrtMiscIO; /* Miscellaneous register */ |
| 848 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ |
| 849 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ |
| 850 | unsigned char StartHorizRetrace; /* CRT-Controller:04h */ |
| 851 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ |
| 852 | unsigned char Overflow; /* CRT-Controller:07h */ |
| 853 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ |
| 854 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ |
| 855 | unsigned char ModeControl; /* CRT-Controller:17h */ |
| 856 | unsigned char ClockingMode; /* Seq-Controller:01h */ |
| 857 | } vga_state; |
| 858 | |
| 859 | static void vga_vesa_blank(struct vgastate *state, int mode) |
| 860 | { |
| 861 | /* save original values of VGA controller registers */ |
| 862 | if (!vga_vesa_blanked) { |
| 863 | spin_lock_irq(&vga_lock); |
| 864 | vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I); |
| 865 | vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg); |
| 866 | vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R); |
| 867 | spin_unlock_irq(&vga_lock); |
| 868 | |
| 869 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ |
| 870 | vga_state.HorizontalTotal = inb_p(vga_video_port_val); |
| 871 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ |
| 872 | vga_state.HorizDisplayEnd = inb_p(vga_video_port_val); |
| 873 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ |
| 874 | vga_state.StartHorizRetrace = inb_p(vga_video_port_val); |
| 875 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ |
| 876 | vga_state.EndHorizRetrace = inb_p(vga_video_port_val); |
| 877 | outb_p(0x07, vga_video_port_reg); /* Overflow */ |
| 878 | vga_state.Overflow = inb_p(vga_video_port_val); |
| 879 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ |
| 880 | vga_state.StartVertRetrace = inb_p(vga_video_port_val); |
| 881 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ |
| 882 | vga_state.EndVertRetrace = inb_p(vga_video_port_val); |
| 883 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ |
| 884 | vga_state.ModeControl = inb_p(vga_video_port_val); |
| 885 | vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); |
| 886 | } |
| 887 | |
| 888 | /* assure that video is enabled */ |
| 889 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ |
| 890 | spin_lock_irq(&vga_lock); |
| 891 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20); |
| 892 | |
| 893 | /* test for vertical retrace in process.... */ |
| 894 | if ((vga_state.CrtMiscIO & 0x80) == 0x80) |
| 895 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF); |
| 896 | |
| 897 | /* |
| 898 | * Set <End of vertical retrace> to minimum (0) and |
| 899 | * <Start of vertical Retrace> to maximum (incl. overflow) |
| 900 | * Result: turn off vertical sync (VSync) pulse. |
| 901 | */ |
| 902 | if (mode & VESA_VSYNC_SUSPEND) { |
| 903 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ |
| 904 | outb_p(0xff, vga_video_port_val); /* maximum value */ |
| 905 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ |
| 906 | outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */ |
| 907 | outb_p(0x07, vga_video_port_reg); /* Overflow */ |
| 908 | outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */ |
| 909 | } |
| 910 | |
| 911 | if (mode & VESA_HSYNC_SUSPEND) { |
| 912 | /* |
| 913 | * Set <End of horizontal retrace> to minimum (0) and |
| 914 | * <Start of horizontal Retrace> to maximum |
| 915 | * Result: turn off horizontal sync (HSync) pulse. |
| 916 | */ |
| 917 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ |
| 918 | outb_p(0xff, vga_video_port_val); /* maximum */ |
| 919 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ |
| 920 | outb_p(0x00, vga_video_port_val); /* minimum (0) */ |
| 921 | } |
| 922 | |
| 923 | /* restore both index registers */ |
| 924 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); |
| 925 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); |
| 926 | spin_unlock_irq(&vga_lock); |
| 927 | } |
| 928 | |
| 929 | static void vga_vesa_unblank(struct vgastate *state) |
| 930 | { |
| 931 | /* restore original values of VGA controller registers */ |
| 932 | spin_lock_irq(&vga_lock); |
| 933 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO); |
| 934 | |
| 935 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ |
| 936 | outb_p(vga_state.HorizontalTotal, vga_video_port_val); |
| 937 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ |
| 938 | outb_p(vga_state.HorizDisplayEnd, vga_video_port_val); |
| 939 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ |
| 940 | outb_p(vga_state.StartHorizRetrace, vga_video_port_val); |
| 941 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ |
| 942 | outb_p(vga_state.EndHorizRetrace, vga_video_port_val); |
| 943 | outb_p(0x07, vga_video_port_reg); /* Overflow */ |
| 944 | outb_p(vga_state.Overflow, vga_video_port_val); |
| 945 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ |
| 946 | outb_p(vga_state.StartVertRetrace, vga_video_port_val); |
| 947 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ |
| 948 | outb_p(vga_state.EndVertRetrace, vga_video_port_val); |
| 949 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ |
| 950 | outb_p(vga_state.ModeControl, vga_video_port_val); |
| 951 | /* ClockingMode */ |
| 952 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode); |
| 953 | |
| 954 | /* restore index/control registers */ |
| 955 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); |
| 956 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); |
| 957 | spin_unlock_irq(&vga_lock); |
| 958 | } |
| 959 | |
| 960 | static void vga_pal_blank(struct vgastate *state) |
| 961 | { |
| 962 | int i; |
| 963 | |
Pozsar Balazs | 1a66ddc | 2005-10-30 15:03:06 -0800 | [diff] [blame] | 964 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | for (i = 0; i < 16; i++) { |
| 966 | vga_w(state->vgabase, VGA_PEL_IW, i); |
| 967 | vga_w(state->vgabase, VGA_PEL_D, 0); |
| 968 | vga_w(state->vgabase, VGA_PEL_D, 0); |
| 969 | vga_w(state->vgabase, VGA_PEL_D, 0); |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch) |
| 974 | { |
| 975 | switch (blank) { |
| 976 | case 0: /* Unblank */ |
| 977 | if (vga_vesa_blanked) { |
| 978 | vga_vesa_unblank(&state); |
| 979 | vga_vesa_blanked = 0; |
| 980 | } |
| 981 | if (vga_palette_blanked) { |
| 982 | vga_set_palette(c, color_table); |
| 983 | vga_palette_blanked = 0; |
| 984 | return 0; |
| 985 | } |
| 986 | vga_is_gfx = 0; |
| 987 | /* Tell console.c that it has to restore the screen itself */ |
| 988 | return 1; |
| 989 | case 1: /* Normal blanking */ |
| 990 | case -1: /* Obsolete */ |
| 991 | if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { |
| 992 | vga_pal_blank(&state); |
| 993 | vga_palette_blanked = 1; |
| 994 | return 0; |
| 995 | } |
| 996 | vgacon_set_origin(c); |
| 997 | scr_memsetw((void *) vga_vram_base, BLANK, |
| 998 | c->vc_screenbuf_size); |
| 999 | if (mode_switch) |
| 1000 | vga_is_gfx = 1; |
| 1001 | return 1; |
| 1002 | default: /* VESA blanking */ |
| 1003 | if (vga_video_type == VIDEO_TYPE_VGAC) { |
| 1004 | vga_vesa_blank(&state, blank - 1); |
| 1005 | vga_vesa_blanked = blank; |
| 1006 | } |
| 1007 | return 0; |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * PIO_FONT support. |
| 1013 | * |
| 1014 | * The font loading code goes back to the codepage package by |
| 1015 | * Joel Hoffman (joel@wam.umd.edu). (He reports that the original |
| 1016 | * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 |
| 1017 | * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) |
| 1018 | * |
| 1019 | * Change for certain monochrome monitors by Yury Shevchuck |
| 1020 | * (sizif@botik.yaroslavl.su). |
| 1021 | */ |
| 1022 | |
| 1023 | #ifdef CAN_LOAD_EGA_FONTS |
| 1024 | |
| 1025 | #define colourmap 0xa0000 |
| 1026 | /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we |
| 1027 | should use 0xA0000 for the bwmap as well.. */ |
| 1028 | #define blackwmap 0xa0000 |
| 1029 | #define cmapsz 8192 |
| 1030 | |
| 1031 | static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512) |
| 1032 | { |
| 1033 | unsigned short video_port_status = vga_video_port_reg + 6; |
| 1034 | int font_select = 0x00, beg, i; |
| 1035 | char *charmap; |
| 1036 | |
| 1037 | if (vga_video_type != VIDEO_TYPE_EGAM) { |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 1038 | charmap = (char *) VGA_MAP_MEM(colourmap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | beg = 0x0e; |
| 1040 | #ifdef VGA_CAN_DO_64KB |
| 1041 | if (vga_video_type == VIDEO_TYPE_VGAC) |
| 1042 | beg = 0x06; |
| 1043 | #endif |
| 1044 | } else { |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 1045 | charmap = (char *) VGA_MAP_MEM(blackwmap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | beg = 0x0a; |
| 1047 | } |
| 1048 | |
| 1049 | #ifdef BROKEN_GRAPHICS_PROGRAMS |
| 1050 | /* |
| 1051 | * All fonts are loaded in slot 0 (0:1 for 512 ch) |
| 1052 | */ |
| 1053 | |
| 1054 | if (!arg) |
| 1055 | return -EINVAL; /* Return to default font not supported */ |
| 1056 | |
| 1057 | vga_font_is_default = 0; |
| 1058 | font_select = ch512 ? 0x04 : 0x00; |
| 1059 | #else |
| 1060 | /* |
| 1061 | * The default font is kept in slot 0 and is never touched. |
| 1062 | * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch) |
| 1063 | */ |
| 1064 | |
| 1065 | if (set) { |
| 1066 | vga_font_is_default = !arg; |
| 1067 | if (!arg) |
| 1068 | ch512 = 0; /* Default font is always 256 */ |
| 1069 | font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00; |
| 1070 | } |
| 1071 | |
| 1072 | if (!vga_font_is_default) |
| 1073 | charmap += 4 * cmapsz; |
| 1074 | #endif |
| 1075 | |
| 1076 | unlock_kernel(); |
| 1077 | spin_lock_irq(&vga_lock); |
| 1078 | /* First, the Sequencer */ |
| 1079 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); |
| 1080 | /* CPU writes only to map 2 */ |
| 1081 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04); |
| 1082 | /* Sequential addressing */ |
| 1083 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07); |
| 1084 | /* Clear synchronous reset */ |
| 1085 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); |
| 1086 | |
| 1087 | /* Now, the graphics controller, select map 2 */ |
| 1088 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02); |
| 1089 | /* disable odd-even addressing */ |
| 1090 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00); |
| 1091 | /* map start at A000:0000 */ |
| 1092 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00); |
| 1093 | spin_unlock_irq(&vga_lock); |
| 1094 | |
| 1095 | if (arg) { |
| 1096 | if (set) |
| 1097 | for (i = 0; i < cmapsz; i++) |
| 1098 | vga_writeb(arg[i], charmap + i); |
| 1099 | else |
| 1100 | for (i = 0; i < cmapsz; i++) |
| 1101 | arg[i] = vga_readb(charmap + i); |
| 1102 | |
| 1103 | /* |
| 1104 | * In 512-character mode, the character map is not contiguous if |
| 1105 | * we want to remain EGA compatible -- which we do |
| 1106 | */ |
| 1107 | |
| 1108 | if (ch512) { |
| 1109 | charmap += 2 * cmapsz; |
| 1110 | arg += cmapsz; |
| 1111 | if (set) |
| 1112 | for (i = 0; i < cmapsz; i++) |
| 1113 | vga_writeb(arg[i], charmap + i); |
| 1114 | else |
| 1115 | for (i = 0; i < cmapsz; i++) |
| 1116 | arg[i] = vga_readb(charmap + i); |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | spin_lock_irq(&vga_lock); |
| 1121 | /* First, the sequencer, Synchronous reset */ |
| 1122 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); |
| 1123 | /* CPU writes to maps 0 and 1 */ |
| 1124 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03); |
| 1125 | /* odd-even addressing */ |
| 1126 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03); |
| 1127 | /* Character Map Select */ |
| 1128 | if (set) |
| 1129 | vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select); |
| 1130 | /* clear synchronous reset */ |
| 1131 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); |
| 1132 | |
| 1133 | /* Now, the graphics controller, select map 0 for CPU */ |
| 1134 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00); |
| 1135 | /* enable even-odd addressing */ |
| 1136 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10); |
| 1137 | /* map starts at b800:0 or b000:0 */ |
| 1138 | vga_wgfx(state->vgabase, VGA_GFX_MISC, beg); |
| 1139 | |
| 1140 | /* if 512 char mode is already enabled don't re-enable it. */ |
| 1141 | if ((set) && (ch512 != vga_512_chars)) { |
| 1142 | int i; |
| 1143 | |
| 1144 | /* attribute controller */ |
| 1145 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 1146 | struct vc_data *c = vc_cons[i].d; |
| 1147 | if (c && c->vc_sw == &vga_con) |
| 1148 | c->vc_hi_font_mask = ch512 ? 0x0800 : 0; |
| 1149 | } |
| 1150 | vga_512_chars = ch512; |
| 1151 | /* 256-char: enable intensity bit |
| 1152 | 512-char: disable intensity bit */ |
| 1153 | inb_p(video_port_status); /* clear address flip-flop */ |
| 1154 | /* color plane enable register */ |
| 1155 | vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f); |
| 1156 | /* Wilton (1987) mentions the following; I don't know what |
| 1157 | it means, but it works, and it appears necessary */ |
| 1158 | inb_p(video_port_status); |
| 1159 | vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); |
| 1160 | } |
| 1161 | spin_unlock_irq(&vga_lock); |
| 1162 | lock_kernel(); |
| 1163 | return 0; |
| 1164 | } |
| 1165 | |
| 1166 | /* |
| 1167 | * Adjust the screen to fit a font of a certain height |
| 1168 | */ |
| 1169 | static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) |
| 1170 | { |
| 1171 | unsigned char ovr, vde, fsr; |
| 1172 | int rows, maxscan, i; |
| 1173 | |
| 1174 | rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ |
| 1175 | maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ |
| 1176 | |
| 1177 | /* Reprogram the CRTC for the new font size |
| 1178 | Note: the attempt to read the overflow register will fail |
| 1179 | on an EGA, but using 0xff for the previous value appears to |
| 1180 | be OK for EGA text modes in the range 257-512 scan lines, so I |
| 1181 | guess we don't need to worry about it. |
| 1182 | |
| 1183 | The same applies for the spill bits in the font size and cursor |
| 1184 | registers; they are write-only on EGA, but it appears that they |
| 1185 | are all don't care bits on EGA, so I guess it doesn't matter. */ |
| 1186 | |
| 1187 | spin_lock_irq(&vga_lock); |
| 1188 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
| 1189 | ovr = inb_p(vga_video_port_val); |
| 1190 | outb_p(0x09, vga_video_port_reg); /* Font size register */ |
| 1191 | fsr = inb_p(vga_video_port_val); |
| 1192 | spin_unlock_irq(&vga_lock); |
| 1193 | |
| 1194 | vde = maxscan & 0xff; /* Vertical display end reg */ |
| 1195 | ovr = (ovr & 0xbd) + /* Overflow register */ |
| 1196 | ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); |
| 1197 | fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ |
| 1198 | |
| 1199 | spin_lock_irq(&vga_lock); |
| 1200 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
| 1201 | outb_p(ovr, vga_video_port_val); |
| 1202 | outb_p(0x09, vga_video_port_reg); /* Font size */ |
| 1203 | outb_p(fsr, vga_video_port_val); |
| 1204 | outb_p(0x12, vga_video_port_reg); /* Vertical display limit */ |
| 1205 | outb_p(vde, vga_video_port_val); |
| 1206 | spin_unlock_irq(&vga_lock); |
Antonino A. Daplas | 5ef897c | 2005-11-21 21:32:26 -0800 | [diff] [blame] | 1207 | vga_video_font_height = fontheight; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | |
| 1209 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 1210 | struct vc_data *c = vc_cons[i].d; |
| 1211 | |
| 1212 | if (c && c->vc_sw == &vga_con) { |
| 1213 | if (CON_IS_VISIBLE(c)) { |
| 1214 | /* void size to cause regs to be rewritten */ |
| 1215 | cursor_size_lastfrom = 0; |
| 1216 | cursor_size_lastto = 0; |
| 1217 | c->vc_sw->con_cursor(c, CM_DRAW); |
| 1218 | } |
| 1219 | c->vc_font.height = fontheight; |
| 1220 | vc_resize(c, 0, rows); /* Adjust console size */ |
| 1221 | } |
| 1222 | } |
| 1223 | return 0; |
| 1224 | } |
| 1225 | |
| 1226 | static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags) |
| 1227 | { |
| 1228 | unsigned charcount = font->charcount; |
| 1229 | int rc; |
| 1230 | |
| 1231 | if (vga_video_type < VIDEO_TYPE_EGAM) |
| 1232 | return -EINVAL; |
| 1233 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 1234 | if (font->width != VGA_FONTWIDTH || |
| 1235 | (charcount != 256 && charcount != 512)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | return -EINVAL; |
| 1237 | |
| 1238 | rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512); |
| 1239 | if (rc) |
| 1240 | return rc; |
| 1241 | |
| 1242 | if (!(flags & KD_FONT_FLAG_DONT_RECALC)) |
| 1243 | rc = vgacon_adjust_height(c, font->height); |
| 1244 | return rc; |
| 1245 | } |
| 1246 | |
| 1247 | static int vgacon_font_get(struct vc_data *c, struct console_font *font) |
| 1248 | { |
| 1249 | if (vga_video_type < VIDEO_TYPE_EGAM) |
| 1250 | return -EINVAL; |
| 1251 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 1252 | font->width = VGA_FONTWIDTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | font->height = c->vc_font.height; |
| 1254 | font->charcount = vga_512_chars ? 512 : 256; |
| 1255 | if (!font->data) |
| 1256 | return 0; |
| 1257 | return vgacon_do_font_op(&state, font->data, 0, 0); |
| 1258 | } |
| 1259 | |
| 1260 | #else |
| 1261 | |
| 1262 | #define vgacon_font_set NULL |
| 1263 | #define vgacon_font_get NULL |
| 1264 | |
| 1265 | #endif |
| 1266 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1267 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
| 1268 | unsigned int height) |
| 1269 | { |
Antonino A. Daplas | 6d36ba6 | 2005-09-15 21:14:56 +0800 | [diff] [blame] | 1270 | if (width % 2 || width > ORIG_VIDEO_COLS || |
| 1271 | height > (ORIG_VIDEO_LINES * vga_default_font_height)/ |
| 1272 | c->vc_font.height) |
Samuel Thibault | 0aec486 | 2005-10-16 20:29:22 -0700 | [diff] [blame] | 1273 | /* let svgatextmode tinker with video timings */ |
| 1274 | return 0; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1275 | |
| 1276 | if (CON_IS_VISIBLE(c) && !vga_is_gfx) /* who knows */ |
| 1277 | vgacon_doresize(c, width, height); |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | static int vgacon_set_origin(struct vc_data *c) |
| 1282 | { |
| 1283 | if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ |
| 1284 | (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ |
| 1285 | return 0; |
| 1286 | c->vc_origin = c->vc_visible_origin = vga_vram_base; |
| 1287 | vga_set_mem_top(c); |
| 1288 | vga_rolled_over = 0; |
| 1289 | return 1; |
| 1290 | } |
| 1291 | |
| 1292 | static void vgacon_save_screen(struct vc_data *c) |
| 1293 | { |
| 1294 | static int vga_bootup_console = 0; |
| 1295 | |
| 1296 | if (!vga_bootup_console) { |
| 1297 | /* This is a gross hack, but here is the only place we can |
| 1298 | * set bootup console parameters without messing up generic |
| 1299 | * console initialization routines. |
| 1300 | */ |
| 1301 | vga_bootup_console = 1; |
| 1302 | c->vc_x = ORIG_X; |
| 1303 | c->vc_y = ORIG_Y; |
| 1304 | } |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 1305 | |
| 1306 | /* We can't copy in more then the size of the video buffer, |
| 1307 | * or we'll be copying in VGA BIOS */ |
| 1308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | if (!vga_is_gfx) |
| 1310 | scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 1311 | c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | } |
| 1313 | |
| 1314 | static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, |
| 1315 | int lines) |
| 1316 | { |
| 1317 | unsigned long oldo; |
| 1318 | unsigned int delta; |
| 1319 | |
| 1320 | if (t || b != c->vc_rows || vga_is_gfx) |
| 1321 | return 0; |
| 1322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
| 1324 | return 0; |
| 1325 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 1326 | vgacon_restore_screen(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | oldo = c->vc_origin; |
| 1328 | delta = lines * c->vc_size_row; |
| 1329 | if (dir == SM_UP) { |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 1330 | vgacon_scrollback_update(c, t, lines); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | if (c->vc_scr_end + delta >= vga_vram_end) { |
| 1332 | scr_memcpyw((u16 *) vga_vram_base, |
| 1333 | (u16 *) (oldo + delta), |
| 1334 | c->vc_screenbuf_size - delta); |
| 1335 | c->vc_origin = vga_vram_base; |
| 1336 | vga_rolled_over = oldo - vga_vram_base; |
| 1337 | } else |
| 1338 | c->vc_origin += delta; |
| 1339 | scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - |
| 1340 | delta), c->vc_video_erase_char, |
| 1341 | delta); |
| 1342 | } else { |
| 1343 | if (oldo - delta < vga_vram_base) { |
| 1344 | scr_memmovew((u16 *) (vga_vram_end - |
| 1345 | c->vc_screenbuf_size + |
| 1346 | delta), (u16 *) oldo, |
| 1347 | c->vc_screenbuf_size - delta); |
| 1348 | c->vc_origin = vga_vram_end - c->vc_screenbuf_size; |
| 1349 | vga_rolled_over = 0; |
| 1350 | } else |
| 1351 | c->vc_origin -= delta; |
| 1352 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; |
| 1353 | scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, |
| 1354 | delta); |
| 1355 | } |
| 1356 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; |
| 1357 | c->vc_visible_origin = c->vc_origin; |
| 1358 | vga_set_mem_top(c); |
| 1359 | c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; |
| 1360 | return 1; |
| 1361 | } |
| 1362 | |
| 1363 | |
| 1364 | /* |
| 1365 | * The console `switch' structure for the VGA based console |
| 1366 | */ |
| 1367 | |
| 1368 | static int vgacon_dummy(struct vc_data *c) |
| 1369 | { |
| 1370 | return 0; |
| 1371 | } |
| 1372 | |
| 1373 | #define DUMMY (void *) vgacon_dummy |
| 1374 | |
| 1375 | const struct consw vga_con = { |
| 1376 | .owner = THIS_MODULE, |
| 1377 | .con_startup = vgacon_startup, |
| 1378 | .con_init = vgacon_init, |
| 1379 | .con_deinit = vgacon_deinit, |
| 1380 | .con_clear = DUMMY, |
| 1381 | .con_putc = DUMMY, |
| 1382 | .con_putcs = DUMMY, |
| 1383 | .con_cursor = vgacon_cursor, |
| 1384 | .con_scroll = vgacon_scroll, |
| 1385 | .con_bmove = DUMMY, |
| 1386 | .con_switch = vgacon_switch, |
| 1387 | .con_blank = vgacon_blank, |
| 1388 | .con_font_set = vgacon_font_set, |
| 1389 | .con_font_get = vgacon_font_get, |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1390 | .con_resize = vgacon_resize, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | .con_set_palette = vgacon_set_palette, |
| 1392 | .con_scrolldelta = vgacon_scrolldelta, |
| 1393 | .con_set_origin = vgacon_set_origin, |
| 1394 | .con_save_screen = vgacon_save_screen, |
| 1395 | .con_build_attr = vgacon_build_attr, |
| 1396 | .con_invert_region = vgacon_invert_region, |
| 1397 | }; |
| 1398 | |
| 1399 | MODULE_LICENSE("GPL"); |