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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/module.h> |
| 37 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/fs.h> |
| 39 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 49 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 57 | static u32 vgacon_xres; |
| 58 | static u32 vgacon_yres; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 72 | #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count); |
| 90 | static unsigned long vgacon_uni_pagedir[2]; |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | /* Description of the hardware situation */ |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 112 | static int vga_scan_lines __read_mostly; |
| 113 | static unsigned int vga_rolled_over; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 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 |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 183 | /* software scrollback */ |
| 184 | static void *vgacon_scrollback; |
| 185 | static int vgacon_scrollback_tail; |
| 186 | static int vgacon_scrollback_size; |
| 187 | static int vgacon_scrollback_rows; |
| 188 | static int vgacon_scrollback_cnt; |
| 189 | static int vgacon_scrollback_cur; |
| 190 | static int vgacon_scrollback_save; |
| 191 | static int vgacon_scrollback_restore; |
| 192 | |
| 193 | static void vgacon_scrollback_init(int pitch) |
| 194 | { |
| 195 | int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; |
| 196 | |
| 197 | if (vgacon_scrollback) { |
| 198 | vgacon_scrollback_cnt = 0; |
| 199 | vgacon_scrollback_tail = 0; |
| 200 | vgacon_scrollback_cur = 0; |
| 201 | vgacon_scrollback_rows = rows - 1; |
| 202 | vgacon_scrollback_size = rows * pitch; |
| 203 | } |
| 204 | } |
| 205 | |
Sam Ravnborg | 80e2798 | 2007-07-21 04:37:31 -0700 | [diff] [blame] | 206 | /* |
| 207 | * Called only duing init so call of alloc_bootmen is ok. |
| 208 | * Marked __init_refok to silence modpost. |
| 209 | */ |
| 210 | static void __init_refok vgacon_scrollback_startup(void) |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 211 | { |
Pekka Enberg | b8ec757 | 2009-06-11 19:25:37 +0300 | [diff] [blame] | 212 | vgacon_scrollback = kcalloc(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024, GFP_NOWAIT); |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 213 | vgacon_scrollback_init(vga_video_num_columns * 2); |
| 214 | } |
| 215 | |
| 216 | static void vgacon_scrollback_update(struct vc_data *c, int t, int count) |
| 217 | { |
| 218 | void *p; |
| 219 | |
| 220 | if (!vgacon_scrollback_size || c->vc_num != fg_console) |
| 221 | return; |
| 222 | |
| 223 | p = (void *) (c->vc_origin + t * c->vc_size_row); |
| 224 | |
| 225 | while (count--) { |
| 226 | scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, |
| 227 | p, c->vc_size_row); |
| 228 | vgacon_scrollback_cnt++; |
| 229 | p += c->vc_size_row; |
| 230 | vgacon_scrollback_tail += c->vc_size_row; |
| 231 | |
| 232 | if (vgacon_scrollback_tail >= vgacon_scrollback_size) |
| 233 | vgacon_scrollback_tail = 0; |
| 234 | |
| 235 | if (vgacon_scrollback_cnt > vgacon_scrollback_rows) |
| 236 | vgacon_scrollback_cnt = vgacon_scrollback_rows; |
| 237 | |
| 238 | vgacon_scrollback_cur = vgacon_scrollback_cnt; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | static void vgacon_restore_screen(struct vc_data *c) |
| 243 | { |
| 244 | vgacon_scrollback_save = 0; |
| 245 | |
| 246 | if (!vga_is_gfx && !vgacon_scrollback_restore) { |
| 247 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
| 248 | c->vc_screenbuf_size > vga_vram_size ? |
| 249 | vga_vram_size : c->vc_screenbuf_size); |
| 250 | vgacon_scrollback_restore = 1; |
| 251 | vgacon_scrollback_cur = vgacon_scrollback_cnt; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | static int vgacon_scrolldelta(struct vc_data *c, int lines) |
| 256 | { |
Marcin Slusarz | 5ab4840 | 2008-10-15 22:03:50 -0700 | [diff] [blame] | 257 | int start, end, count, soff; |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 258 | |
| 259 | if (!lines) { |
| 260 | c->vc_visible_origin = c->vc_origin; |
| 261 | vga_set_mem_top(c); |
| 262 | return 1; |
| 263 | } |
| 264 | |
| 265 | if (!vgacon_scrollback) |
| 266 | return 1; |
| 267 | |
| 268 | if (!vgacon_scrollback_save) { |
| 269 | vgacon_cursor(c, CM_ERASE); |
| 270 | vgacon_save_screen(c); |
| 271 | vgacon_scrollback_save = 1; |
| 272 | } |
| 273 | |
| 274 | vgacon_scrollback_restore = 0; |
| 275 | start = vgacon_scrollback_cur + lines; |
| 276 | end = start + abs(lines); |
| 277 | |
| 278 | if (start < 0) |
| 279 | start = 0; |
| 280 | |
| 281 | if (start > vgacon_scrollback_cnt) |
| 282 | start = vgacon_scrollback_cnt; |
| 283 | |
| 284 | if (end < 0) |
| 285 | end = 0; |
| 286 | |
| 287 | if (end > vgacon_scrollback_cnt) |
| 288 | end = vgacon_scrollback_cnt; |
| 289 | |
| 290 | vgacon_scrollback_cur = start; |
| 291 | count = end - start; |
| 292 | soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * |
| 293 | c->vc_size_row); |
| 294 | soff -= count * c->vc_size_row; |
| 295 | |
| 296 | if (soff < 0) |
| 297 | soff += vgacon_scrollback_size; |
| 298 | |
| 299 | count = vgacon_scrollback_cnt - start; |
| 300 | |
| 301 | if (count > c->vc_rows) |
| 302 | count = c->vc_rows; |
| 303 | |
Marcin Slusarz | c38182a | 2008-10-15 22:03:49 -0700 | [diff] [blame] | 304 | if (count) { |
| 305 | int copysize; |
Marcin Slusarz | 5ab4840 | 2008-10-15 22:03:50 -0700 | [diff] [blame] | 306 | |
| 307 | int diff = c->vc_rows - count; |
| 308 | void *d = (void *) c->vc_origin; |
| 309 | void *s = (void *) c->vc_screenbuf; |
| 310 | |
Marcin Slusarz | c38182a | 2008-10-15 22:03:49 -0700 | [diff] [blame] | 311 | count *= c->vc_size_row; |
| 312 | /* how much memory to end of buffer left? */ |
| 313 | copysize = min(count, vgacon_scrollback_size - soff); |
| 314 | scr_memcpyw(d, vgacon_scrollback + soff, copysize); |
| 315 | d += copysize; |
| 316 | count -= copysize; |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 317 | |
Marcin Slusarz | c38182a | 2008-10-15 22:03:49 -0700 | [diff] [blame] | 318 | if (count) { |
| 319 | scr_memcpyw(d, vgacon_scrollback, count); |
| 320 | d += count; |
| 321 | } |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 322 | |
Marcin Slusarz | c38182a | 2008-10-15 22:03:49 -0700 | [diff] [blame] | 323 | if (diff) |
| 324 | scr_memcpyw(d, s, diff * c->vc_size_row); |
Marcin Slusarz | 5ab4840 | 2008-10-15 22:03:50 -0700 | [diff] [blame] | 325 | } else |
| 326 | vgacon_cursor(c, CM_MOVE); |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 327 | |
| 328 | return 1; |
| 329 | } |
| 330 | #else |
| 331 | #define vgacon_scrollback_startup(...) do { } while (0) |
| 332 | #define vgacon_scrollback_init(...) do { } while (0) |
| 333 | #define vgacon_scrollback_update(...) do { } while (0) |
| 334 | |
| 335 | static void vgacon_restore_screen(struct vc_data *c) |
| 336 | { |
| 337 | if (c->vc_origin != c->vc_visible_origin) |
| 338 | vgacon_scrolldelta(c, 0); |
| 339 | } |
| 340 | |
| 341 | static int vgacon_scrolldelta(struct vc_data *c, int lines) |
| 342 | { |
| 343 | if (!lines) /* Turn scrollback off */ |
| 344 | c->vc_visible_origin = c->vc_origin; |
| 345 | else { |
| 346 | int margin = c->vc_size_row * 4; |
| 347 | int ul, we, p, st; |
| 348 | |
| 349 | if (vga_rolled_over > |
| 350 | (c->vc_scr_end - vga_vram_base) + margin) { |
| 351 | ul = c->vc_scr_end - vga_vram_base; |
| 352 | we = vga_rolled_over + c->vc_size_row; |
| 353 | } else { |
| 354 | ul = 0; |
| 355 | we = vga_vram_size; |
| 356 | } |
| 357 | p = (c->vc_visible_origin - vga_vram_base - ul + we) % we + |
| 358 | lines * c->vc_size_row; |
| 359 | st = (c->vc_origin - vga_vram_base - ul + we) % we; |
| 360 | if (st < 2 * margin) |
| 361 | margin = 0; |
| 362 | if (p < margin) |
| 363 | p = 0; |
| 364 | if (p > st - margin) |
| 365 | p = st; |
| 366 | c->vc_visible_origin = vga_vram_base + (p + ul) % we; |
| 367 | } |
| 368 | vga_set_mem_top(c); |
| 369 | return 1; |
| 370 | } |
| 371 | #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ |
| 372 | |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 373 | static const char *vgacon_startup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
| 375 | const char *display_desc = NULL; |
| 376 | u16 saved1, saved2; |
| 377 | volatile u16 *p; |
| 378 | |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 379 | if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | no_vga: |
| 381 | #ifdef CONFIG_DUMMY_CONSOLE |
| 382 | conswitchp = &dummy_con; |
| 383 | return conswitchp->con_startup(); |
| 384 | #else |
| 385 | return NULL; |
| 386 | #endif |
| 387 | } |
| 388 | |
H. Peter Anvin | 30c8264 | 2007-10-15 17:13:22 -0700 | [diff] [blame] | 389 | /* boot_params.screen_info initialized? */ |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 390 | if ((screen_info.orig_video_mode == 0) && |
| 391 | (screen_info.orig_video_lines == 0) && |
| 392 | (screen_info.orig_video_cols == 0)) |
Gerd Hoffmann | a1a4849 | 2007-05-16 22:11:09 -0700 | [diff] [blame] | 393 | goto no_vga; |
| 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /* VGA16 modes are not handled by VGACON */ |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 396 | if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ |
| 397 | (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ |
| 398 | (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ |
| 399 | (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ |
| 400 | (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | goto no_vga; |
| 402 | |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 403 | vga_video_num_lines = screen_info.orig_video_lines; |
| 404 | vga_video_num_columns = screen_info.orig_video_cols; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | state.vgabase = NULL; |
| 406 | |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 407 | if (screen_info.orig_video_mode == 7) { |
| 408 | /* Monochrome display */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | vga_vram_base = 0xb0000; |
| 410 | vga_video_port_reg = VGA_CRT_IM; |
| 411 | vga_video_port_val = VGA_CRT_DM; |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 412 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | static struct resource ega_console_resource = |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 414 | { .name = "ega", .start = 0x3B0, .end = 0x3BF }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | vga_video_type = VIDEO_TYPE_EGAM; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 416 | vga_vram_size = 0x8000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | display_desc = "EGA+"; |
| 418 | request_resource(&ioport_resource, |
| 419 | &ega_console_resource); |
| 420 | } else { |
| 421 | static struct resource mda1_console_resource = |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 422 | { .name = "mda", .start = 0x3B0, .end = 0x3BB }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | static struct resource mda2_console_resource = |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 424 | { .name = "mda", .start = 0x3BF, .end = 0x3BF }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | vga_video_type = VIDEO_TYPE_MDA; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 426 | vga_vram_size = 0x2000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | display_desc = "*MDA"; |
| 428 | request_resource(&ioport_resource, |
| 429 | &mda1_console_resource); |
| 430 | request_resource(&ioport_resource, |
| 431 | &mda2_console_resource); |
| 432 | vga_video_font_height = 14; |
| 433 | } |
| 434 | } else { |
| 435 | /* If not, it is color. */ |
| 436 | vga_can_do_color = 1; |
| 437 | vga_vram_base = 0xb8000; |
| 438 | vga_video_port_reg = VGA_CRT_IC; |
| 439 | vga_video_port_val = VGA_CRT_DC; |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 440 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | int i; |
| 442 | |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 443 | vga_vram_size = 0x8000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 445 | if (!screen_info.orig_video_isVGA) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | static struct resource ega_console_resource |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 447 | = { .name = "ega", .start = 0x3C0, .end = 0x3DF }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | vga_video_type = VIDEO_TYPE_EGAC; |
| 449 | display_desc = "EGA"; |
| 450 | request_resource(&ioport_resource, |
| 451 | &ega_console_resource); |
| 452 | } else { |
| 453 | static struct resource vga_console_resource |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 454 | = { .name = "vga+", .start = 0x3C0, .end = 0x3DF }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | vga_video_type = VIDEO_TYPE_VGAC; |
| 456 | display_desc = "VGA+"; |
| 457 | request_resource(&ioport_resource, |
| 458 | &vga_console_resource); |
| 459 | |
| 460 | #ifdef VGA_CAN_DO_64KB |
| 461 | /* |
| 462 | * get 64K rather than 32K of video RAM. |
| 463 | * This doesn't actually work on all "VGA" |
| 464 | * controllers (it seems like setting MM=01 |
| 465 | * and COE=1 isn't necessarily a good idea) |
| 466 | */ |
| 467 | vga_vram_base = 0xa0000; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 468 | vga_vram_size = 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | outb_p(6, VGA_GFX_I); |
| 470 | outb_p(6, VGA_GFX_D); |
| 471 | #endif |
| 472 | /* |
| 473 | * Normalise the palette registers, to point |
| 474 | * the 16 screen colours to the first 16 |
| 475 | * DAC entries. |
| 476 | */ |
| 477 | |
| 478 | for (i = 0; i < 16; i++) { |
| 479 | inb_p(VGA_IS1_RC); |
| 480 | outb_p(i, VGA_ATT_W); |
| 481 | outb_p(i, VGA_ATT_W); |
| 482 | } |
| 483 | outb_p(0x20, VGA_ATT_W); |
| 484 | |
| 485 | /* |
| 486 | * Now set the DAC registers back to their |
| 487 | * default values |
| 488 | */ |
| 489 | for (i = 0; i < 16; i++) { |
| 490 | outb_p(color_table[i], VGA_PEL_IW); |
| 491 | outb_p(default_red[i], VGA_PEL_D); |
| 492 | outb_p(default_grn[i], VGA_PEL_D); |
| 493 | outb_p(default_blu[i], VGA_PEL_D); |
| 494 | } |
| 495 | } |
| 496 | } else { |
| 497 | static struct resource cga_console_resource = |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 498 | { .name = "cga", .start = 0x3D4, .end = 0x3D5 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | vga_video_type = VIDEO_TYPE_CGA; |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 500 | vga_vram_size = 0x2000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | display_desc = "*CGA"; |
| 502 | request_resource(&ioport_resource, |
| 503 | &cga_console_resource); |
| 504 | vga_video_font_height = 8; |
| 505 | } |
| 506 | } |
| 507 | |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 508 | vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); |
| 509 | vga_vram_end = vga_vram_base + vga_vram_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
| 511 | /* |
| 512 | * Find out if there is a graphics card present. |
| 513 | * Are there smarter methods around? |
| 514 | */ |
| 515 | p = (volatile u16 *) vga_vram_base; |
| 516 | saved1 = scr_readw(p); |
| 517 | saved2 = scr_readw(p + 1); |
| 518 | scr_writew(0xAA55, p); |
| 519 | scr_writew(0x55AA, p + 1); |
| 520 | if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { |
| 521 | scr_writew(saved1, p); |
| 522 | scr_writew(saved2, p + 1); |
| 523 | goto no_vga; |
| 524 | } |
| 525 | scr_writew(0x55AA, p); |
| 526 | scr_writew(0xAA55, p + 1); |
| 527 | if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { |
| 528 | scr_writew(saved1, p); |
| 529 | scr_writew(saved2, p + 1); |
| 530 | goto no_vga; |
| 531 | } |
| 532 | scr_writew(saved1, p); |
| 533 | scr_writew(saved2, p + 1); |
| 534 | |
| 535 | if (vga_video_type == VIDEO_TYPE_EGAC |
| 536 | || vga_video_type == VIDEO_TYPE_VGAC |
| 537 | || vga_video_type == VIDEO_TYPE_EGAM) { |
| 538 | vga_hardscroll_enabled = vga_hardscroll_user_enable; |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 539 | vga_default_font_height = screen_info.orig_video_points; |
| 540 | vga_video_font_height = screen_info.orig_video_points; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /* This may be suboptimal but is a safe bet - go with it */ |
| 542 | vga_scan_lines = |
| 543 | vga_video_font_height * vga_video_num_lines; |
| 544 | } |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 545 | |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 546 | vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 547 | vgacon_yres = vga_scan_lines; |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 548 | |
| 549 | if (!vga_init_done) { |
| 550 | vgacon_scrollback_startup(); |
| 551 | vga_init_done = 1; |
| 552 | } |
| 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return display_desc; |
| 555 | } |
| 556 | |
| 557 | static void vgacon_init(struct vc_data *c, int init) |
| 558 | { |
| 559 | unsigned long p; |
| 560 | |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 561 | /* |
| 562 | * We cannot be loaded as a module, therefore init is always 1, |
| 563 | * but vgacon_init can be called more than once, and init will |
| 564 | * not be 1. |
| 565 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | c->vc_can_do_color = vga_can_do_color; |
Antonino A. Daplas | 50ec42e | 2006-06-26 00:27:02 -0700 | [diff] [blame] | 567 | |
| 568 | /* set dimensions manually if init != 0 since vc_resize() will fail */ |
| 569 | if (init) { |
| 570 | c->vc_cols = vga_video_num_columns; |
| 571 | c->vc_rows = vga_video_num_lines; |
| 572 | } else |
| 573 | vc_resize(c, vga_video_num_columns, vga_video_num_lines); |
| 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | c->vc_scan_lines = vga_scan_lines; |
| 576 | c->vc_font.height = vga_video_font_height; |
| 577 | c->vc_complement_mask = 0x7700; |
Bill Nottingham | a40920b | 2005-05-01 08:59:07 -0700 | [diff] [blame] | 578 | if (vga_512_chars) |
| 579 | c->vc_hi_font_mask = 0x0800; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | p = *c->vc_uni_pagedir_loc; |
| 581 | if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir || |
| 582 | !--c->vc_uni_pagedir_loc[1]) |
| 583 | con_free_unimap(c); |
| 584 | c->vc_uni_pagedir_loc = vgacon_uni_pagedir; |
| 585 | vgacon_uni_pagedir[1]++; |
| 586 | if (!vgacon_uni_pagedir[0] && p) |
| 587 | con_set_default_unimap(c); |
| 588 | } |
| 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | static void vgacon_deinit(struct vc_data *c) |
| 591 | { |
Francisco Jerez | f0c7d2b | 2009-09-22 16:47:53 -0700 | [diff] [blame] | 592 | /* When closing the active console, reset video origin */ |
| 593 | if (CON_IS_VISIBLE(c)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | c->vc_visible_origin = vga_vram_base; |
| 595 | vga_set_mem_top(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | } |
Francisco Jerez | f0c7d2b | 2009-09-22 16:47:53 -0700 | [diff] [blame] | 597 | |
| 598 | if (!--vgacon_uni_pagedir[1]) |
| 599 | con_free_unimap(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Jan Engelhardt | fa6ce9a | 2007-05-08 00:38:04 -0700 | [diff] [blame] | 605 | u8 blink, u8 underline, u8 reverse, u8 italic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | { |
| 607 | u8 attr = color; |
| 608 | |
| 609 | if (vga_can_do_color) { |
Jan Engelhardt | fa6ce9a | 2007-05-08 00:38:04 -0700 | [diff] [blame] | 610 | if (italic) |
| 611 | attr = (attr & 0xF0) | c->vc_itcolor; |
| 612 | else if (underline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Jan Engelhardt | fa6ce9a | 2007-05-08 00:38:04 -0700 | [diff] [blame] | 626 | if (italic) |
| 627 | attr = (attr & 0xF8) | 0x02; |
| 628 | else if (underline) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
| 677 | curs = (curs & 0xc0) | from; |
| 678 | cure = (cure & 0xe0) | to; |
| 679 | |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 680 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | outb_p(curs, vga_video_port_val); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 682 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Antonino A. Daplas | 2ae8547 | 2007-05-08 00:40:06 -0700 | [diff] [blame] | 689 | if (c->vc_mode != KD_TEXT) |
| 690 | return; |
| 691 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 692 | vgacon_restore_screen(c); |
| 693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | switch (mode) { |
| 695 | case CM_ERASE: |
Samuel Thibault | 88dcb6c | 2005-11-05 22:19:50 +0100 | [diff] [blame] | 696 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Samuel Thibault | 2115aea | 2006-03-27 01:17:19 -0800 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 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; |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 757 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 758 | |
| 759 | spin_lock_irqsave(&vga_lock, flags); |
| 760 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 761 | vgacon_xres = width * VGA_FONTWIDTH; |
| 762 | vgacon_yres = height * c->vc_font.height; |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 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); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 766 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 767 | if (max_scan & 0x80) |
| 768 | scanlines <<= 1; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 769 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 770 | outb_p(VGA_CRTC_MODE, vga_video_port_reg); |
| 771 | mode = inb_p(vga_video_port_val); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 772 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 773 | if (mode & 0x04) |
| 774 | scanlines >>= 1; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 775 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 776 | scanlines -= 1; |
| 777 | scanlines_lo = scanlines & 0xff; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 778 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 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 | } |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 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 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 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); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 804 | |
Samuel Thibault | d1521260 | 2006-02-24 13:03:59 -0800 | [diff] [blame] | 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 | } |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 809 | |
| 810 | spin_unlock_irqrestore(&vga_lock, flags); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 811 | return 0; |
| 812 | } |
| 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | static int vgacon_switch(struct vc_data *c) |
| 815 | { |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 816 | int x = c->vc_cols * VGA_FONTWIDTH; |
| 817 | int y = c->vc_rows * c->vc_font.height; |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 818 | int rows = screen_info.orig_video_lines * vga_default_font_height/ |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 819 | c->vc_font.height; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 827 | |
| 828 | /* We can only copy out the size of the video buffer here, |
| 829 | * otherwise we get into VGA BIOS */ |
| 830 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 831 | if (!vga_is_gfx) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 833 | c->vc_screenbuf_size > vga_vram_size ? |
| 834 | vga_vram_size : c->vc_screenbuf_size); |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 835 | |
| 836 | if ((vgacon_xres != x || vgacon_yres != y) && |
| 837 | (!(vga_video_num_columns % 2) && |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 838 | vga_video_num_columns <= screen_info.orig_video_cols && |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 839 | vga_video_num_lines <= rows)) |
Samuel Thibault | 0aec486 | 2005-10-16 20:29:22 -0700 | [diff] [blame] | 840 | vgacon_doresize(c, c->vc_cols, c->vc_rows); |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 841 | } |
| 842 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 843 | vgacon_scrollback_init(c->vc_size_row); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Pozsar Balazs | 1a66ddc | 2005-10-30 15:03:06 -0800 | [diff] [blame] | 851 | vga_w(state.vgabase, VGA_PEL_MSK, 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Pozsar Balazs | 1a66ddc | 2005-10-30 15:03:06 -0800 | [diff] [blame] | 994 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 1068 | charmap = (char *) VGA_MAP_MEM(colourmap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | beg = 0x0e; |
| 1070 | #ifdef VGA_CAN_DO_64KB |
| 1071 | if (vga_video_type == VIDEO_TYPE_VGAC) |
| 1072 | beg = 0x06; |
| 1073 | #endif |
| 1074 | } else { |
Bjorn Helgaas | 4f1bcaf | 2006-06-22 14:47:32 -0700 | [diff] [blame] | 1075 | charmap = (char *) VGA_MAP_MEM(blackwmap, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Antonino A. Daplas | 5ef897c | 2005-11-21 21:32:26 -0800 | [diff] [blame] | 1235 | vga_video_font_height = fontheight; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 1262 | if (font->width != VGA_FONTWIDTH || |
| 1263 | (charcount != 256 && charcount != 512)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Antonino A. Daplas | 53dbb26 | 2006-01-08 01:02:36 -0800 | [diff] [blame] | 1280 | font->width = VGA_FONTWIDTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | font->height = c->vc_font.height; |
| 1282 | font->charcount = vga_512_chars ? 512 : 256; |
| 1283 | if (!font->data) |
| 1284 | return 0; |
Stefan Bader | b175dc0 | 2009-04-30 15:08:44 -0700 | [diff] [blame] | 1285 | return vgacon_do_font_op(&state, font->data, 0, vga_512_chars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | #else |
| 1289 | |
| 1290 | #define vgacon_font_set NULL |
| 1291 | #define vgacon_font_get NULL |
| 1292 | |
| 1293 | #endif |
| 1294 | |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1295 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 1296 | unsigned int height, unsigned int user) |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1297 | { |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 1298 | if (width % 2 || width > screen_info.orig_video_cols || |
| 1299 | height > (screen_info.orig_video_lines * vga_default_font_height)/ |
Antonino A. Daplas | 6d36ba6 | 2005-09-15 21:14:56 +0800 | [diff] [blame] | 1300 | c->vc_font.height) |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 1301 | /* let svgatextmode tinker with video timings and |
| 1302 | return success */ |
| 1303 | return (user) ? 0 : -EINVAL; |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1304 | |
| 1305 | if (CON_IS_VISIBLE(c) && !vga_is_gfx) /* who knows */ |
| 1306 | vgacon_doresize(c, width, height); |
| 1307 | return 0; |
| 1308 | } |
| 1309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
H. Peter Anvin | 3ea3351 | 2007-10-16 22:36:04 -0700 | [diff] [blame] | 1331 | c->vc_x = screen_info.orig_x; |
| 1332 | c->vc_y = screen_info.orig_y; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | } |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 1334 | |
Frederik Schwarzer | 025dfda | 2008-10-16 19:02:37 +0200 | [diff] [blame] | 1335 | /* We can't copy in more than the size of the video buffer, |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 1336 | * or we'll be copying in VGA BIOS */ |
| 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | if (!vga_is_gfx) |
| 1339 | scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, |
James Simmons | f18cd8f | 2005-06-21 17:17:00 -0700 | [diff] [blame] | 1340 | 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] | 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 | |
Antonino A. Daplas | 2ae8547 | 2007-05-08 00:40:06 -0700 | [diff] [blame] | 1349 | if (t || b != c->vc_rows || vga_is_gfx || c->vc_mode != KD_TEXT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | return 0; |
| 1351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
| 1353 | return 0; |
| 1354 | |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 1355 | vgacon_restore_screen(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | oldo = c->vc_origin; |
| 1357 | delta = lines * c->vc_size_row; |
| 1358 | if (dir == SM_UP) { |
Antonino A. Daplas | 15bdab9 | 2006-03-27 01:17:20 -0800 | [diff] [blame] | 1359 | vgacon_scrollback_update(c, t, lines); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 - |
Linus Torvalds | 93f78da | 2008-10-14 12:12:02 -0700 | [diff] [blame] | 1369 | delta), c->vc_video_erase_char, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 93f78da | 2008-10-14 12:12:02 -0700 | [diff] [blame] | 1382 | scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Samuel Thibault | 28254d4 | 2005-09-09 13:01:58 -0700 | [diff] [blame] | 1419 | .con_resize = vgacon_resize, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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"); |