Commit | Line | Data |
---|---|---|
1da177e4 LT |
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; | |
53dbb26d AD |
59 | static u32 vgacon_xres; |
60 | static u32 vgacon_yres; | |
1da177e4 LT |
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 | |
53dbb26d | 74 | #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 */ | |
f18cd8f7 | 99 | static int vga_vram_size; /* Size of video memory */ |
1da177e4 LT |
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; | |
117 | ||
118 | static int __init no_scroll(char *str) | |
119 | { | |
120 | /* | |
121 | * Disabling scrollback is required for the Braillex ib80-piezo | |
122 | * Braille reader made by F.H. Papenmeier (Germany). | |
123 | * Use the "no-scroll" bootflag. | |
124 | */ | |
125 | vga_hardscroll_user_enable = vga_hardscroll_enabled = 0; | |
126 | return 1; | |
127 | } | |
128 | ||
129 | __setup("no-scroll", no_scroll); | |
130 | ||
131 | /* | |
132 | * By replacing the four outb_p with two back to back outw, we can reduce | |
133 | * the window of opportunity to see text mislocated to the RHS of the | |
134 | * console during heavy scrolling activity. However there is the remote | |
135 | * possibility that some pre-dinosaur hardware won't like the back to back | |
136 | * I/O. Since the Xservers get away with it, we should be able to as well. | |
137 | */ | |
138 | static inline void write_vga(unsigned char reg, unsigned int val) | |
139 | { | |
140 | unsigned int v1, v2; | |
141 | unsigned long flags; | |
142 | ||
143 | /* | |
144 | * ddprintk might set the console position from interrupt | |
145 | * handlers, thus the write has to be IRQ-atomic. | |
146 | */ | |
147 | spin_lock_irqsave(&vga_lock, flags); | |
148 | ||
149 | #ifndef SLOW_VGA | |
150 | v1 = reg + (val & 0xff00); | |
151 | v2 = reg + 1 + ((val << 8) & 0xff00); | |
152 | outw(v1, vga_video_port_reg); | |
153 | outw(v2, vga_video_port_reg); | |
154 | #else | |
155 | outb_p(reg, vga_video_port_reg); | |
156 | outb_p(val >> 8, vga_video_port_val); | |
157 | outb_p(reg + 1, vga_video_port_reg); | |
158 | outb_p(val & 0xff, vga_video_port_val); | |
159 | #endif | |
160 | spin_unlock_irqrestore(&vga_lock, flags); | |
161 | } | |
162 | ||
15bdab95 AD |
163 | static inline void vga_set_mem_top(struct vc_data *c) |
164 | { | |
165 | write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2); | |
166 | } | |
167 | ||
168 | #ifdef CONFIG_VGACON_SOFT_SCROLLBACK | |
169 | #include <linux/bootmem.h> | |
170 | /* software scrollback */ | |
171 | static void *vgacon_scrollback; | |
172 | static int vgacon_scrollback_tail; | |
173 | static int vgacon_scrollback_size; | |
174 | static int vgacon_scrollback_rows; | |
175 | static int vgacon_scrollback_cnt; | |
176 | static int vgacon_scrollback_cur; | |
177 | static int vgacon_scrollback_save; | |
178 | static int vgacon_scrollback_restore; | |
179 | ||
180 | static void vgacon_scrollback_init(int pitch) | |
181 | { | |
182 | int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; | |
183 | ||
184 | if (vgacon_scrollback) { | |
185 | vgacon_scrollback_cnt = 0; | |
186 | vgacon_scrollback_tail = 0; | |
187 | vgacon_scrollback_cur = 0; | |
188 | vgacon_scrollback_rows = rows - 1; | |
189 | vgacon_scrollback_size = rows * pitch; | |
190 | } | |
191 | } | |
192 | ||
193 | static void __init vgacon_scrollback_startup(void) | |
194 | { | |
195 | vgacon_scrollback = alloc_bootmem(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE | |
196 | * 1024); | |
197 | vgacon_scrollback_init(vga_video_num_columns * 2); | |
198 | } | |
199 | ||
200 | static void vgacon_scrollback_update(struct vc_data *c, int t, int count) | |
201 | { | |
202 | void *p; | |
203 | ||
204 | if (!vgacon_scrollback_size || c->vc_num != fg_console) | |
205 | return; | |
206 | ||
207 | p = (void *) (c->vc_origin + t * c->vc_size_row); | |
208 | ||
209 | while (count--) { | |
210 | scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, | |
211 | p, c->vc_size_row); | |
212 | vgacon_scrollback_cnt++; | |
213 | p += c->vc_size_row; | |
214 | vgacon_scrollback_tail += c->vc_size_row; | |
215 | ||
216 | if (vgacon_scrollback_tail >= vgacon_scrollback_size) | |
217 | vgacon_scrollback_tail = 0; | |
218 | ||
219 | if (vgacon_scrollback_cnt > vgacon_scrollback_rows) | |
220 | vgacon_scrollback_cnt = vgacon_scrollback_rows; | |
221 | ||
222 | vgacon_scrollback_cur = vgacon_scrollback_cnt; | |
223 | } | |
224 | } | |
225 | ||
226 | static void vgacon_restore_screen(struct vc_data *c) | |
227 | { | |
228 | vgacon_scrollback_save = 0; | |
229 | ||
230 | if (!vga_is_gfx && !vgacon_scrollback_restore) { | |
231 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, | |
232 | c->vc_screenbuf_size > vga_vram_size ? | |
233 | vga_vram_size : c->vc_screenbuf_size); | |
234 | vgacon_scrollback_restore = 1; | |
235 | vgacon_scrollback_cur = vgacon_scrollback_cnt; | |
236 | } | |
237 | } | |
238 | ||
239 | static int vgacon_scrolldelta(struct vc_data *c, int lines) | |
240 | { | |
241 | int start, end, count, soff, diff; | |
242 | void *d, *s; | |
243 | ||
244 | if (!lines) { | |
245 | c->vc_visible_origin = c->vc_origin; | |
246 | vga_set_mem_top(c); | |
247 | return 1; | |
248 | } | |
249 | ||
250 | if (!vgacon_scrollback) | |
251 | return 1; | |
252 | ||
253 | if (!vgacon_scrollback_save) { | |
254 | vgacon_cursor(c, CM_ERASE); | |
255 | vgacon_save_screen(c); | |
256 | vgacon_scrollback_save = 1; | |
257 | } | |
258 | ||
259 | vgacon_scrollback_restore = 0; | |
260 | start = vgacon_scrollback_cur + lines; | |
261 | end = start + abs(lines); | |
262 | ||
263 | if (start < 0) | |
264 | start = 0; | |
265 | ||
266 | if (start > vgacon_scrollback_cnt) | |
267 | start = vgacon_scrollback_cnt; | |
268 | ||
269 | if (end < 0) | |
270 | end = 0; | |
271 | ||
272 | if (end > vgacon_scrollback_cnt) | |
273 | end = vgacon_scrollback_cnt; | |
274 | ||
275 | vgacon_scrollback_cur = start; | |
276 | count = end - start; | |
277 | soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * | |
278 | c->vc_size_row); | |
279 | soff -= count * c->vc_size_row; | |
280 | ||
281 | if (soff < 0) | |
282 | soff += vgacon_scrollback_size; | |
283 | ||
284 | count = vgacon_scrollback_cnt - start; | |
285 | ||
286 | if (count > c->vc_rows) | |
287 | count = c->vc_rows; | |
288 | ||
289 | diff = c->vc_rows - count; | |
290 | ||
291 | d = (void *) c->vc_origin; | |
292 | s = (void *) c->vc_screenbuf; | |
293 | ||
294 | while (count--) { | |
295 | scr_memcpyw(d, vgacon_scrollback + soff, c->vc_size_row); | |
296 | d += c->vc_size_row; | |
297 | soff += c->vc_size_row; | |
298 | ||
299 | if (soff >= vgacon_scrollback_size) | |
300 | soff = 0; | |
301 | } | |
302 | ||
303 | if (diff == c->vc_rows) { | |
304 | vgacon_cursor(c, CM_MOVE); | |
305 | } else { | |
306 | while (diff--) { | |
307 | scr_memcpyw(d, s, c->vc_size_row); | |
308 | d += c->vc_size_row; | |
309 | s += c->vc_size_row; | |
310 | } | |
311 | } | |
312 | ||
313 | return 1; | |
314 | } | |
315 | #else | |
316 | #define vgacon_scrollback_startup(...) do { } while (0) | |
317 | #define vgacon_scrollback_init(...) do { } while (0) | |
318 | #define vgacon_scrollback_update(...) do { } while (0) | |
319 | ||
320 | static void vgacon_restore_screen(struct vc_data *c) | |
321 | { | |
322 | if (c->vc_origin != c->vc_visible_origin) | |
323 | vgacon_scrolldelta(c, 0); | |
324 | } | |
325 | ||
326 | static int vgacon_scrolldelta(struct vc_data *c, int lines) | |
327 | { | |
328 | if (!lines) /* Turn scrollback off */ | |
329 | c->vc_visible_origin = c->vc_origin; | |
330 | else { | |
331 | int margin = c->vc_size_row * 4; | |
332 | int ul, we, p, st; | |
333 | ||
334 | if (vga_rolled_over > | |
335 | (c->vc_scr_end - vga_vram_base) + margin) { | |
336 | ul = c->vc_scr_end - vga_vram_base; | |
337 | we = vga_rolled_over + c->vc_size_row; | |
338 | } else { | |
339 | ul = 0; | |
340 | we = vga_vram_size; | |
341 | } | |
342 | p = (c->vc_visible_origin - vga_vram_base - ul + we) % we + | |
343 | lines * c->vc_size_row; | |
344 | st = (c->vc_origin - vga_vram_base - ul + we) % we; | |
345 | if (st < 2 * margin) | |
346 | margin = 0; | |
347 | if (p < margin) | |
348 | p = 0; | |
349 | if (p > st - margin) | |
350 | p = st; | |
351 | c->vc_visible_origin = vga_vram_base + (p + ul) % we; | |
352 | } | |
353 | vga_set_mem_top(c); | |
354 | return 1; | |
355 | } | |
356 | #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ | |
357 | ||
1da177e4 LT |
358 | static const char __init *vgacon_startup(void) |
359 | { | |
360 | const char *display_desc = NULL; | |
361 | u16 saved1, saved2; | |
362 | volatile u16 *p; | |
363 | ||
364 | if (ORIG_VIDEO_ISVGA == VIDEO_TYPE_VLFB) { | |
365 | no_vga: | |
366 | #ifdef CONFIG_DUMMY_CONSOLE | |
367 | conswitchp = &dummy_con; | |
368 | return conswitchp->con_startup(); | |
369 | #else | |
370 | return NULL; | |
371 | #endif | |
372 | } | |
373 | ||
374 | /* VGA16 modes are not handled by VGACON */ | |
375 | if ((ORIG_VIDEO_MODE == 0x0D) || /* 320x200/4 */ | |
376 | (ORIG_VIDEO_MODE == 0x0E) || /* 640x200/4 */ | |
377 | (ORIG_VIDEO_MODE == 0x10) || /* 640x350/4 */ | |
378 | (ORIG_VIDEO_MODE == 0x12) || /* 640x480/4 */ | |
379 | (ORIG_VIDEO_MODE == 0x6A)) /* 800x600/4, 0x6A is very common */ | |
380 | goto no_vga; | |
381 | ||
382 | vga_video_num_lines = ORIG_VIDEO_LINES; | |
383 | vga_video_num_columns = ORIG_VIDEO_COLS; | |
384 | state.vgabase = NULL; | |
385 | ||
386 | if (ORIG_VIDEO_MODE == 7) { /* Is this a monochrome display? */ | |
387 | vga_vram_base = 0xb0000; | |
388 | vga_video_port_reg = VGA_CRT_IM; | |
389 | vga_video_port_val = VGA_CRT_DM; | |
390 | if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) { | |
391 | static struct resource ega_console_resource = | |
392 | { "ega", 0x3B0, 0x3BF }; | |
393 | vga_video_type = VIDEO_TYPE_EGAM; | |
394 | vga_vram_end = 0xb8000; | |
395 | display_desc = "EGA+"; | |
396 | request_resource(&ioport_resource, | |
397 | &ega_console_resource); | |
398 | } else { | |
399 | static struct resource mda1_console_resource = | |
400 | { "mda", 0x3B0, 0x3BB }; | |
401 | static struct resource mda2_console_resource = | |
402 | { "mda", 0x3BF, 0x3BF }; | |
403 | vga_video_type = VIDEO_TYPE_MDA; | |
404 | vga_vram_end = 0xb2000; | |
405 | display_desc = "*MDA"; | |
406 | request_resource(&ioport_resource, | |
407 | &mda1_console_resource); | |
408 | request_resource(&ioport_resource, | |
409 | &mda2_console_resource); | |
410 | vga_video_font_height = 14; | |
411 | } | |
412 | } else { | |
413 | /* If not, it is color. */ | |
414 | vga_can_do_color = 1; | |
415 | vga_vram_base = 0xb8000; | |
416 | vga_video_port_reg = VGA_CRT_IC; | |
417 | vga_video_port_val = VGA_CRT_DC; | |
418 | if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) { | |
419 | int i; | |
420 | ||
421 | vga_vram_end = 0xc0000; | |
422 | ||
423 | if (!ORIG_VIDEO_ISVGA) { | |
424 | static struct resource ega_console_resource | |
425 | = { "ega", 0x3C0, 0x3DF }; | |
426 | vga_video_type = VIDEO_TYPE_EGAC; | |
427 | display_desc = "EGA"; | |
428 | request_resource(&ioport_resource, | |
429 | &ega_console_resource); | |
430 | } else { | |
431 | static struct resource vga_console_resource | |
432 | = { "vga+", 0x3C0, 0x3DF }; | |
433 | vga_video_type = VIDEO_TYPE_VGAC; | |
434 | display_desc = "VGA+"; | |
435 | request_resource(&ioport_resource, | |
436 | &vga_console_resource); | |
437 | ||
438 | #ifdef VGA_CAN_DO_64KB | |
439 | /* | |
440 | * get 64K rather than 32K of video RAM. | |
441 | * This doesn't actually work on all "VGA" | |
442 | * controllers (it seems like setting MM=01 | |
443 | * and COE=1 isn't necessarily a good idea) | |
444 | */ | |
445 | vga_vram_base = 0xa0000; | |
446 | vga_vram_end = 0xb0000; | |
447 | outb_p(6, VGA_GFX_I); | |
448 | outb_p(6, VGA_GFX_D); | |
449 | #endif | |
450 | /* | |
451 | * Normalise the palette registers, to point | |
452 | * the 16 screen colours to the first 16 | |
453 | * DAC entries. | |
454 | */ | |
455 | ||
456 | for (i = 0; i < 16; i++) { | |
457 | inb_p(VGA_IS1_RC); | |
458 | outb_p(i, VGA_ATT_W); | |
459 | outb_p(i, VGA_ATT_W); | |
460 | } | |
461 | outb_p(0x20, VGA_ATT_W); | |
462 | ||
463 | /* | |
464 | * Now set the DAC registers back to their | |
465 | * default values | |
466 | */ | |
467 | for (i = 0; i < 16; i++) { | |
468 | outb_p(color_table[i], VGA_PEL_IW); | |
469 | outb_p(default_red[i], VGA_PEL_D); | |
470 | outb_p(default_grn[i], VGA_PEL_D); | |
471 | outb_p(default_blu[i], VGA_PEL_D); | |
472 | } | |
473 | } | |
474 | } else { | |
475 | static struct resource cga_console_resource = | |
476 | { "cga", 0x3D4, 0x3D5 }; | |
477 | vga_video_type = VIDEO_TYPE_CGA; | |
478 | vga_vram_end = 0xba000; | |
479 | display_desc = "*CGA"; | |
480 | request_resource(&ioport_resource, | |
481 | &cga_console_resource); | |
482 | vga_video_font_height = 8; | |
483 | } | |
484 | } | |
485 | ||
486 | vga_vram_base = VGA_MAP_MEM(vga_vram_base); | |
487 | vga_vram_end = VGA_MAP_MEM(vga_vram_end); | |
f18cd8f7 | 488 | vga_vram_size = vga_vram_end - vga_vram_base; |
1da177e4 LT |
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 | } | |
53dbb26d AD |
524 | |
525 | vgacon_xres = ORIG_VIDEO_COLS * VGA_FONTWIDTH; | |
526 | vgacon_yres = vga_scan_lines; | |
15bdab95 | 527 | vgacon_scrollback_startup(); |
1da177e4 LT |
528 | return display_desc; |
529 | } | |
530 | ||
531 | static void vgacon_init(struct vc_data *c, int init) | |
532 | { | |
533 | unsigned long p; | |
534 | ||
535 | /* We cannot be loaded as a module, therefore init is always 1 */ | |
536 | c->vc_can_do_color = vga_can_do_color; | |
537 | c->vc_cols = vga_video_num_columns; | |
538 | c->vc_rows = vga_video_num_lines; | |
539 | c->vc_scan_lines = vga_scan_lines; | |
540 | c->vc_font.height = vga_video_font_height; | |
541 | c->vc_complement_mask = 0x7700; | |
a40920b4 BN |
542 | if (vga_512_chars) |
543 | c->vc_hi_font_mask = 0x0800; | |
1da177e4 LT |
544 | p = *c->vc_uni_pagedir_loc; |
545 | if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir || | |
546 | !--c->vc_uni_pagedir_loc[1]) | |
547 | con_free_unimap(c); | |
548 | c->vc_uni_pagedir_loc = vgacon_uni_pagedir; | |
549 | vgacon_uni_pagedir[1]++; | |
550 | if (!vgacon_uni_pagedir[0] && p) | |
551 | con_set_default_unimap(c); | |
552 | } | |
553 | ||
1da177e4 LT |
554 | static void vgacon_deinit(struct vc_data *c) |
555 | { | |
556 | /* When closing the last console, reset video origin */ | |
557 | if (!--vgacon_uni_pagedir[1]) { | |
558 | c->vc_visible_origin = vga_vram_base; | |
559 | vga_set_mem_top(c); | |
560 | con_free_unimap(c); | |
561 | } | |
562 | c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; | |
563 | con_set_default_unimap(c); | |
564 | } | |
565 | ||
566 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, | |
567 | u8 blink, u8 underline, u8 reverse) | |
568 | { | |
569 | u8 attr = color; | |
570 | ||
571 | if (vga_can_do_color) { | |
572 | if (underline) | |
573 | attr = (attr & 0xf0) | c->vc_ulcolor; | |
574 | else if (intensity == 0) | |
575 | attr = (attr & 0xf0) | c->vc_halfcolor; | |
576 | } | |
577 | if (reverse) | |
578 | attr = | |
579 | ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & | |
580 | 0x77); | |
581 | if (blink) | |
582 | attr ^= 0x80; | |
583 | if (intensity == 2) | |
584 | attr ^= 0x08; | |
585 | if (!vga_can_do_color) { | |
586 | if (underline) | |
587 | attr = (attr & 0xf8) | 0x01; | |
588 | else if (intensity == 0) | |
589 | attr = (attr & 0xf0) | 0x08; | |
590 | } | |
591 | return attr; | |
592 | } | |
593 | ||
594 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) | |
595 | { | |
596 | int col = vga_can_do_color; | |
597 | ||
598 | while (count--) { | |
599 | u16 a = scr_readw(p); | |
600 | if (col) | |
601 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | | |
602 | (((a) & 0x0700) << 4); | |
603 | else | |
604 | a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; | |
605 | scr_writew(a, p++); | |
606 | } | |
607 | } | |
608 | ||
609 | static void vgacon_set_cursor_size(int xpos, int from, int to) | |
610 | { | |
611 | unsigned long flags; | |
612 | int curs, cure; | |
613 | ||
614 | #ifdef TRIDENT_GLITCH | |
615 | if (xpos < 16) | |
616 | from--, to--; | |
617 | #endif | |
618 | ||
619 | if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) | |
620 | return; | |
621 | cursor_size_lastfrom = from; | |
622 | cursor_size_lastto = to; | |
623 | ||
624 | spin_lock_irqsave(&vga_lock, flags); | |
2115aea8 ST |
625 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
626 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); | |
627 | curs = inb_p(vga_video_port_val); | |
628 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); | |
629 | cure = inb_p(vga_video_port_val); | |
630 | } else { | |
631 | curs = 0; | |
632 | cure = 0; | |
633 | } | |
1da177e4 LT |
634 | |
635 | curs = (curs & 0xc0) | from; | |
636 | cure = (cure & 0xe0) | to; | |
637 | ||
2115aea8 | 638 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
1da177e4 | 639 | outb_p(curs, vga_video_port_val); |
2115aea8 | 640 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
1da177e4 LT |
641 | outb_p(cure, vga_video_port_val); |
642 | spin_unlock_irqrestore(&vga_lock, flags); | |
643 | } | |
644 | ||
645 | static void vgacon_cursor(struct vc_data *c, int mode) | |
646 | { | |
15bdab95 AD |
647 | vgacon_restore_screen(c); |
648 | ||
1da177e4 LT |
649 | switch (mode) { |
650 | case CM_ERASE: | |
88dcb6c4 | 651 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
2115aea8 ST |
652 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
653 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
654 | else | |
655 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
656 | break; |
657 | ||
658 | case CM_MOVE: | |
659 | case CM_DRAW: | |
660 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); | |
661 | switch (c->vc_cursor_type & 0x0f) { | |
662 | case CUR_UNDERLINE: | |
663 | vgacon_set_cursor_size(c->vc_x, | |
664 | c->vc_font.height - | |
665 | (c->vc_font.height < | |
666 | 10 ? 2 : 3), | |
667 | c->vc_font.height - | |
668 | (c->vc_font.height < | |
669 | 10 ? 1 : 2)); | |
670 | break; | |
671 | case CUR_TWO_THIRDS: | |
672 | vgacon_set_cursor_size(c->vc_x, | |
673 | c->vc_font.height / 3, | |
674 | c->vc_font.height - | |
675 | (c->vc_font.height < | |
676 | 10 ? 1 : 2)); | |
677 | break; | |
678 | case CUR_LOWER_THIRD: | |
679 | vgacon_set_cursor_size(c->vc_x, | |
680 | (c->vc_font.height * 2) / 3, | |
681 | c->vc_font.height - | |
682 | (c->vc_font.height < | |
683 | 10 ? 1 : 2)); | |
684 | break; | |
685 | case CUR_LOWER_HALF: | |
686 | vgacon_set_cursor_size(c->vc_x, | |
687 | c->vc_font.height / 2, | |
688 | c->vc_font.height - | |
689 | (c->vc_font.height < | |
690 | 10 ? 1 : 2)); | |
691 | break; | |
692 | case CUR_NONE: | |
2115aea8 ST |
693 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
694 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
695 | else | |
696 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
697 | break; |
698 | default: | |
699 | vgacon_set_cursor_size(c->vc_x, 1, | |
700 | c->vc_font.height); | |
701 | break; | |
702 | } | |
703 | break; | |
704 | } | |
705 | } | |
706 | ||
28254d43 ST |
707 | static int vgacon_doresize(struct vc_data *c, |
708 | unsigned int width, unsigned int height) | |
709 | { | |
710 | unsigned long flags; | |
711 | unsigned int scanlines = height * c->vc_font.height; | |
d1521260 | 712 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
28254d43 ST |
713 | |
714 | spin_lock_irqsave(&vga_lock, flags); | |
715 | ||
53dbb26d AD |
716 | vgacon_xres = width * VGA_FONTWIDTH; |
717 | vgacon_yres = height * c->vc_font.height; | |
d1521260 ST |
718 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
719 | outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); | |
720 | max_scan = inb_p(vga_video_port_val); | |
28254d43 | 721 | |
d1521260 ST |
722 | if (max_scan & 0x80) |
723 | scanlines <<= 1; | |
28254d43 | 724 | |
d1521260 ST |
725 | outb_p(VGA_CRTC_MODE, vga_video_port_reg); |
726 | mode = inb_p(vga_video_port_val); | |
28254d43 | 727 | |
d1521260 ST |
728 | if (mode & 0x04) |
729 | scanlines >>= 1; | |
28254d43 | 730 | |
d1521260 ST |
731 | scanlines -= 1; |
732 | scanlines_lo = scanlines & 0xff; | |
28254d43 | 733 | |
d1521260 ST |
734 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); |
735 | r7 = inb_p(vga_video_port_val) & ~0x42; | |
736 | ||
737 | if (scanlines & 0x100) | |
738 | r7 |= 0x02; | |
739 | if (scanlines & 0x200) | |
740 | r7 |= 0x40; | |
741 | ||
742 | /* deprotect registers */ | |
743 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
744 | vsync_end = inb_p(vga_video_port_val); | |
745 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
746 | outb_p(vsync_end & ~0x80, vga_video_port_val); | |
747 | } | |
28254d43 ST |
748 | |
749 | outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); | |
750 | outb_p(width - 1, vga_video_port_val); | |
751 | outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); | |
752 | outb_p(width >> 1, vga_video_port_val); | |
753 | ||
d1521260 ST |
754 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
755 | outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); | |
756 | outb_p(scanlines_lo, vga_video_port_val); | |
757 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); | |
758 | outb_p(r7,vga_video_port_val); | |
28254d43 | 759 | |
d1521260 ST |
760 | /* reprotect registers */ |
761 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
762 | outb_p(vsync_end, vga_video_port_val); | |
763 | } | |
28254d43 ST |
764 | |
765 | spin_unlock_irqrestore(&vga_lock, flags); | |
28254d43 ST |
766 | return 0; |
767 | } | |
768 | ||
1da177e4 LT |
769 | static int vgacon_switch(struct vc_data *c) |
770 | { | |
53dbb26d AD |
771 | int x = c->vc_cols * VGA_FONTWIDTH; |
772 | int y = c->vc_rows * c->vc_font.height; | |
773 | int rows = ORIG_VIDEO_LINES * vga_default_font_height/ | |
774 | c->vc_font.height; | |
1da177e4 LT |
775 | /* |
776 | * We need to save screen size here as it's the only way | |
777 | * we can spot the screen has been resized and we need to | |
778 | * set size of freshly allocated screens ourselves. | |
779 | */ | |
780 | vga_video_num_columns = c->vc_cols; | |
781 | vga_video_num_lines = c->vc_rows; | |
f18cd8f7 JS |
782 | |
783 | /* We can only copy out the size of the video buffer here, | |
784 | * otherwise we get into VGA BIOS */ | |
785 | ||
28254d43 | 786 | if (!vga_is_gfx) { |
1da177e4 | 787 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
28254d43 ST |
788 | c->vc_screenbuf_size > vga_vram_size ? |
789 | vga_vram_size : c->vc_screenbuf_size); | |
53dbb26d AD |
790 | |
791 | if ((vgacon_xres != x || vgacon_yres != y) && | |
792 | (!(vga_video_num_columns % 2) && | |
793 | vga_video_num_columns <= ORIG_VIDEO_COLS && | |
794 | vga_video_num_lines <= rows)) | |
0aec4867 | 795 | vgacon_doresize(c, c->vc_cols, c->vc_rows); |
28254d43 ST |
796 | } |
797 | ||
15bdab95 | 798 | vgacon_scrollback_init(c->vc_size_row); |
1da177e4 LT |
799 | return 0; /* Redrawing not needed */ |
800 | } | |
801 | ||
802 | static void vga_set_palette(struct vc_data *vc, unsigned char *table) | |
803 | { | |
804 | int i, j; | |
805 | ||
1a66ddcb | 806 | vga_w(state.vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 LT |
807 | for (i = j = 0; i < 16; i++) { |
808 | vga_w(state.vgabase, VGA_PEL_IW, table[i]); | |
809 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
810 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
811 | vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
812 | } | |
813 | } | |
814 | ||
815 | static int vgacon_set_palette(struct vc_data *vc, unsigned char *table) | |
816 | { | |
817 | #ifdef CAN_LOAD_PALETTE | |
818 | if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked | |
819 | || !CON_IS_VISIBLE(vc)) | |
820 | return -EINVAL; | |
821 | vga_set_palette(vc, table); | |
822 | return 0; | |
823 | #else | |
824 | return -EINVAL; | |
825 | #endif | |
826 | } | |
827 | ||
828 | /* structure holding original VGA register settings */ | |
829 | static struct { | |
830 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ | |
831 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ | |
832 | unsigned char CrtMiscIO; /* Miscellaneous register */ | |
833 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ | |
834 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ | |
835 | unsigned char StartHorizRetrace; /* CRT-Controller:04h */ | |
836 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ | |
837 | unsigned char Overflow; /* CRT-Controller:07h */ | |
838 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ | |
839 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ | |
840 | unsigned char ModeControl; /* CRT-Controller:17h */ | |
841 | unsigned char ClockingMode; /* Seq-Controller:01h */ | |
842 | } vga_state; | |
843 | ||
844 | static void vga_vesa_blank(struct vgastate *state, int mode) | |
845 | { | |
846 | /* save original values of VGA controller registers */ | |
847 | if (!vga_vesa_blanked) { | |
848 | spin_lock_irq(&vga_lock); | |
849 | vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I); | |
850 | vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg); | |
851 | vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R); | |
852 | spin_unlock_irq(&vga_lock); | |
853 | ||
854 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
855 | vga_state.HorizontalTotal = inb_p(vga_video_port_val); | |
856 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
857 | vga_state.HorizDisplayEnd = inb_p(vga_video_port_val); | |
858 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
859 | vga_state.StartHorizRetrace = inb_p(vga_video_port_val); | |
860 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
861 | vga_state.EndHorizRetrace = inb_p(vga_video_port_val); | |
862 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
863 | vga_state.Overflow = inb_p(vga_video_port_val); | |
864 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
865 | vga_state.StartVertRetrace = inb_p(vga_video_port_val); | |
866 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
867 | vga_state.EndVertRetrace = inb_p(vga_video_port_val); | |
868 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
869 | vga_state.ModeControl = inb_p(vga_video_port_val); | |
870 | vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); | |
871 | } | |
872 | ||
873 | /* assure that video is enabled */ | |
874 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ | |
875 | spin_lock_irq(&vga_lock); | |
876 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20); | |
877 | ||
878 | /* test for vertical retrace in process.... */ | |
879 | if ((vga_state.CrtMiscIO & 0x80) == 0x80) | |
880 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF); | |
881 | ||
882 | /* | |
883 | * Set <End of vertical retrace> to minimum (0) and | |
884 | * <Start of vertical Retrace> to maximum (incl. overflow) | |
885 | * Result: turn off vertical sync (VSync) pulse. | |
886 | */ | |
887 | if (mode & VESA_VSYNC_SUSPEND) { | |
888 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
889 | outb_p(0xff, vga_video_port_val); /* maximum value */ | |
890 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
891 | outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */ | |
892 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
893 | outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */ | |
894 | } | |
895 | ||
896 | if (mode & VESA_HSYNC_SUSPEND) { | |
897 | /* | |
898 | * Set <End of horizontal retrace> to minimum (0) and | |
899 | * <Start of horizontal Retrace> to maximum | |
900 | * Result: turn off horizontal sync (HSync) pulse. | |
901 | */ | |
902 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
903 | outb_p(0xff, vga_video_port_val); /* maximum */ | |
904 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
905 | outb_p(0x00, vga_video_port_val); /* minimum (0) */ | |
906 | } | |
907 | ||
908 | /* restore both index registers */ | |
909 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
910 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
911 | spin_unlock_irq(&vga_lock); | |
912 | } | |
913 | ||
914 | static void vga_vesa_unblank(struct vgastate *state) | |
915 | { | |
916 | /* restore original values of VGA controller registers */ | |
917 | spin_lock_irq(&vga_lock); | |
918 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO); | |
919 | ||
920 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
921 | outb_p(vga_state.HorizontalTotal, vga_video_port_val); | |
922 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
923 | outb_p(vga_state.HorizDisplayEnd, vga_video_port_val); | |
924 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
925 | outb_p(vga_state.StartHorizRetrace, vga_video_port_val); | |
926 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
927 | outb_p(vga_state.EndHorizRetrace, vga_video_port_val); | |
928 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
929 | outb_p(vga_state.Overflow, vga_video_port_val); | |
930 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
931 | outb_p(vga_state.StartVertRetrace, vga_video_port_val); | |
932 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
933 | outb_p(vga_state.EndVertRetrace, vga_video_port_val); | |
934 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
935 | outb_p(vga_state.ModeControl, vga_video_port_val); | |
936 | /* ClockingMode */ | |
937 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode); | |
938 | ||
939 | /* restore index/control registers */ | |
940 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
941 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
942 | spin_unlock_irq(&vga_lock); | |
943 | } | |
944 | ||
945 | static void vga_pal_blank(struct vgastate *state) | |
946 | { | |
947 | int i; | |
948 | ||
1a66ddcb | 949 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 LT |
950 | for (i = 0; i < 16; i++) { |
951 | vga_w(state->vgabase, VGA_PEL_IW, i); | |
952 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
953 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
954 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
955 | } | |
956 | } | |
957 | ||
958 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch) | |
959 | { | |
960 | switch (blank) { | |
961 | case 0: /* Unblank */ | |
962 | if (vga_vesa_blanked) { | |
963 | vga_vesa_unblank(&state); | |
964 | vga_vesa_blanked = 0; | |
965 | } | |
966 | if (vga_palette_blanked) { | |
967 | vga_set_palette(c, color_table); | |
968 | vga_palette_blanked = 0; | |
969 | return 0; | |
970 | } | |
971 | vga_is_gfx = 0; | |
972 | /* Tell console.c that it has to restore the screen itself */ | |
973 | return 1; | |
974 | case 1: /* Normal blanking */ | |
975 | case -1: /* Obsolete */ | |
976 | if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { | |
977 | vga_pal_blank(&state); | |
978 | vga_palette_blanked = 1; | |
979 | return 0; | |
980 | } | |
981 | vgacon_set_origin(c); | |
982 | scr_memsetw((void *) vga_vram_base, BLANK, | |
983 | c->vc_screenbuf_size); | |
984 | if (mode_switch) | |
985 | vga_is_gfx = 1; | |
986 | return 1; | |
987 | default: /* VESA blanking */ | |
988 | if (vga_video_type == VIDEO_TYPE_VGAC) { | |
989 | vga_vesa_blank(&state, blank - 1); | |
990 | vga_vesa_blanked = blank; | |
991 | } | |
992 | return 0; | |
993 | } | |
994 | } | |
995 | ||
996 | /* | |
997 | * PIO_FONT support. | |
998 | * | |
999 | * The font loading code goes back to the codepage package by | |
1000 | * Joel Hoffman (joel@wam.umd.edu). (He reports that the original | |
1001 | * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 | |
1002 | * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) | |
1003 | * | |
1004 | * Change for certain monochrome monitors by Yury Shevchuck | |
1005 | * (sizif@botik.yaroslavl.su). | |
1006 | */ | |
1007 | ||
1008 | #ifdef CAN_LOAD_EGA_FONTS | |
1009 | ||
1010 | #define colourmap 0xa0000 | |
1011 | /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we | |
1012 | should use 0xA0000 for the bwmap as well.. */ | |
1013 | #define blackwmap 0xa0000 | |
1014 | #define cmapsz 8192 | |
1015 | ||
1016 | static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512) | |
1017 | { | |
1018 | unsigned short video_port_status = vga_video_port_reg + 6; | |
1019 | int font_select = 0x00, beg, i; | |
1020 | char *charmap; | |
1021 | ||
1022 | if (vga_video_type != VIDEO_TYPE_EGAM) { | |
1023 | charmap = (char *) VGA_MAP_MEM(colourmap); | |
1024 | beg = 0x0e; | |
1025 | #ifdef VGA_CAN_DO_64KB | |
1026 | if (vga_video_type == VIDEO_TYPE_VGAC) | |
1027 | beg = 0x06; | |
1028 | #endif | |
1029 | } else { | |
1030 | charmap = (char *) VGA_MAP_MEM(blackwmap); | |
1031 | beg = 0x0a; | |
1032 | } | |
1033 | ||
1034 | #ifdef BROKEN_GRAPHICS_PROGRAMS | |
1035 | /* | |
1036 | * All fonts are loaded in slot 0 (0:1 for 512 ch) | |
1037 | */ | |
1038 | ||
1039 | if (!arg) | |
1040 | return -EINVAL; /* Return to default font not supported */ | |
1041 | ||
1042 | vga_font_is_default = 0; | |
1043 | font_select = ch512 ? 0x04 : 0x00; | |
1044 | #else | |
1045 | /* | |
1046 | * The default font is kept in slot 0 and is never touched. | |
1047 | * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch) | |
1048 | */ | |
1049 | ||
1050 | if (set) { | |
1051 | vga_font_is_default = !arg; | |
1052 | if (!arg) | |
1053 | ch512 = 0; /* Default font is always 256 */ | |
1054 | font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00; | |
1055 | } | |
1056 | ||
1057 | if (!vga_font_is_default) | |
1058 | charmap += 4 * cmapsz; | |
1059 | #endif | |
1060 | ||
1061 | unlock_kernel(); | |
1062 | spin_lock_irq(&vga_lock); | |
1063 | /* First, the Sequencer */ | |
1064 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
1065 | /* CPU writes only to map 2 */ | |
1066 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04); | |
1067 | /* Sequential addressing */ | |
1068 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07); | |
1069 | /* Clear synchronous reset */ | |
1070 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1071 | ||
1072 | /* Now, the graphics controller, select map 2 */ | |
1073 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02); | |
1074 | /* disable odd-even addressing */ | |
1075 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00); | |
1076 | /* map start at A000:0000 */ | |
1077 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00); | |
1078 | spin_unlock_irq(&vga_lock); | |
1079 | ||
1080 | if (arg) { | |
1081 | if (set) | |
1082 | for (i = 0; i < cmapsz; i++) | |
1083 | vga_writeb(arg[i], charmap + i); | |
1084 | else | |
1085 | for (i = 0; i < cmapsz; i++) | |
1086 | arg[i] = vga_readb(charmap + i); | |
1087 | ||
1088 | /* | |
1089 | * In 512-character mode, the character map is not contiguous if | |
1090 | * we want to remain EGA compatible -- which we do | |
1091 | */ | |
1092 | ||
1093 | if (ch512) { | |
1094 | charmap += 2 * cmapsz; | |
1095 | arg += cmapsz; | |
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 | ||
1105 | spin_lock_irq(&vga_lock); | |
1106 | /* First, the sequencer, Synchronous reset */ | |
1107 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); | |
1108 | /* CPU writes to maps 0 and 1 */ | |
1109 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03); | |
1110 | /* odd-even addressing */ | |
1111 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03); | |
1112 | /* Character Map Select */ | |
1113 | if (set) | |
1114 | vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select); | |
1115 | /* clear synchronous reset */ | |
1116 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1117 | ||
1118 | /* Now, the graphics controller, select map 0 for CPU */ | |
1119 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00); | |
1120 | /* enable even-odd addressing */ | |
1121 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10); | |
1122 | /* map starts at b800:0 or b000:0 */ | |
1123 | vga_wgfx(state->vgabase, VGA_GFX_MISC, beg); | |
1124 | ||
1125 | /* if 512 char mode is already enabled don't re-enable it. */ | |
1126 | if ((set) && (ch512 != vga_512_chars)) { | |
1127 | int i; | |
1128 | ||
1129 | /* attribute controller */ | |
1130 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1131 | struct vc_data *c = vc_cons[i].d; | |
1132 | if (c && c->vc_sw == &vga_con) | |
1133 | c->vc_hi_font_mask = ch512 ? 0x0800 : 0; | |
1134 | } | |
1135 | vga_512_chars = ch512; | |
1136 | /* 256-char: enable intensity bit | |
1137 | 512-char: disable intensity bit */ | |
1138 | inb_p(video_port_status); /* clear address flip-flop */ | |
1139 | /* color plane enable register */ | |
1140 | vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f); | |
1141 | /* Wilton (1987) mentions the following; I don't know what | |
1142 | it means, but it works, and it appears necessary */ | |
1143 | inb_p(video_port_status); | |
1144 | vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); | |
1145 | } | |
1146 | spin_unlock_irq(&vga_lock); | |
1147 | lock_kernel(); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Adjust the screen to fit a font of a certain height | |
1153 | */ | |
1154 | static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) | |
1155 | { | |
1156 | unsigned char ovr, vde, fsr; | |
1157 | int rows, maxscan, i; | |
1158 | ||
1159 | rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ | |
1160 | maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ | |
1161 | ||
1162 | /* Reprogram the CRTC for the new font size | |
1163 | Note: the attempt to read the overflow register will fail | |
1164 | on an EGA, but using 0xff for the previous value appears to | |
1165 | be OK for EGA text modes in the range 257-512 scan lines, so I | |
1166 | guess we don't need to worry about it. | |
1167 | ||
1168 | The same applies for the spill bits in the font size and cursor | |
1169 | registers; they are write-only on EGA, but it appears that they | |
1170 | are all don't care bits on EGA, so I guess it doesn't matter. */ | |
1171 | ||
1172 | spin_lock_irq(&vga_lock); | |
1173 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ | |
1174 | ovr = inb_p(vga_video_port_val); | |
1175 | outb_p(0x09, vga_video_port_reg); /* Font size register */ | |
1176 | fsr = inb_p(vga_video_port_val); | |
1177 | spin_unlock_irq(&vga_lock); | |
1178 | ||
1179 | vde = maxscan & 0xff; /* Vertical display end reg */ | |
1180 | ovr = (ovr & 0xbd) + /* Overflow register */ | |
1181 | ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); | |
1182 | fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ | |
1183 | ||
1184 | spin_lock_irq(&vga_lock); | |
1185 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ | |
1186 | outb_p(ovr, vga_video_port_val); | |
1187 | outb_p(0x09, vga_video_port_reg); /* Font size */ | |
1188 | outb_p(fsr, vga_video_port_val); | |
1189 | outb_p(0x12, vga_video_port_reg); /* Vertical display limit */ | |
1190 | outb_p(vde, vga_video_port_val); | |
1191 | spin_unlock_irq(&vga_lock); | |
5ef897c7 | 1192 | vga_video_font_height = fontheight; |
1da177e4 LT |
1193 | |
1194 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1195 | struct vc_data *c = vc_cons[i].d; | |
1196 | ||
1197 | if (c && c->vc_sw == &vga_con) { | |
1198 | if (CON_IS_VISIBLE(c)) { | |
1199 | /* void size to cause regs to be rewritten */ | |
1200 | cursor_size_lastfrom = 0; | |
1201 | cursor_size_lastto = 0; | |
1202 | c->vc_sw->con_cursor(c, CM_DRAW); | |
1203 | } | |
1204 | c->vc_font.height = fontheight; | |
1205 | vc_resize(c, 0, rows); /* Adjust console size */ | |
1206 | } | |
1207 | } | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags) | |
1212 | { | |
1213 | unsigned charcount = font->charcount; | |
1214 | int rc; | |
1215 | ||
1216 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1217 | return -EINVAL; | |
1218 | ||
53dbb26d AD |
1219 | if (font->width != VGA_FONTWIDTH || |
1220 | (charcount != 256 && charcount != 512)) | |
1da177e4 LT |
1221 | return -EINVAL; |
1222 | ||
1223 | rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512); | |
1224 | if (rc) | |
1225 | return rc; | |
1226 | ||
1227 | if (!(flags & KD_FONT_FLAG_DONT_RECALC)) | |
1228 | rc = vgacon_adjust_height(c, font->height); | |
1229 | return rc; | |
1230 | } | |
1231 | ||
1232 | static int vgacon_font_get(struct vc_data *c, struct console_font *font) | |
1233 | { | |
1234 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1235 | return -EINVAL; | |
1236 | ||
53dbb26d | 1237 | font->width = VGA_FONTWIDTH; |
1da177e4 LT |
1238 | font->height = c->vc_font.height; |
1239 | font->charcount = vga_512_chars ? 512 : 256; | |
1240 | if (!font->data) | |
1241 | return 0; | |
1242 | return vgacon_do_font_op(&state, font->data, 0, 0); | |
1243 | } | |
1244 | ||
1245 | #else | |
1246 | ||
1247 | #define vgacon_font_set NULL | |
1248 | #define vgacon_font_get NULL | |
1249 | ||
1250 | #endif | |
1251 | ||
28254d43 ST |
1252 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
1253 | unsigned int height) | |
1254 | { | |
6d36ba62 AD |
1255 | if (width % 2 || width > ORIG_VIDEO_COLS || |
1256 | height > (ORIG_VIDEO_LINES * vga_default_font_height)/ | |
1257 | c->vc_font.height) | |
0aec4867 ST |
1258 | /* let svgatextmode tinker with video timings */ |
1259 | return 0; | |
28254d43 ST |
1260 | |
1261 | if (CON_IS_VISIBLE(c) && !vga_is_gfx) /* who knows */ | |
1262 | vgacon_doresize(c, width, height); | |
1263 | return 0; | |
1264 | } | |
1265 | ||
1da177e4 LT |
1266 | static int vgacon_set_origin(struct vc_data *c) |
1267 | { | |
1268 | if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ | |
1269 | (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ | |
1270 | return 0; | |
1271 | c->vc_origin = c->vc_visible_origin = vga_vram_base; | |
1272 | vga_set_mem_top(c); | |
1273 | vga_rolled_over = 0; | |
1274 | return 1; | |
1275 | } | |
1276 | ||
1277 | static void vgacon_save_screen(struct vc_data *c) | |
1278 | { | |
1279 | static int vga_bootup_console = 0; | |
1280 | ||
1281 | if (!vga_bootup_console) { | |
1282 | /* This is a gross hack, but here is the only place we can | |
1283 | * set bootup console parameters without messing up generic | |
1284 | * console initialization routines. | |
1285 | */ | |
1286 | vga_bootup_console = 1; | |
1287 | c->vc_x = ORIG_X; | |
1288 | c->vc_y = ORIG_Y; | |
1289 | } | |
f18cd8f7 JS |
1290 | |
1291 | /* We can't copy in more then the size of the video buffer, | |
1292 | * or we'll be copying in VGA BIOS */ | |
1293 | ||
1da177e4 LT |
1294 | if (!vga_is_gfx) |
1295 | scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, | |
f18cd8f7 | 1296 | c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | static int vgacon_scroll(struct vc_data *c, int t, int b, int dir, | |
1300 | int lines) | |
1301 | { | |
1302 | unsigned long oldo; | |
1303 | unsigned int delta; | |
1304 | ||
1305 | if (t || b != c->vc_rows || vga_is_gfx) | |
1306 | return 0; | |
1307 | ||
1da177e4 LT |
1308 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
1309 | return 0; | |
1310 | ||
15bdab95 | 1311 | vgacon_restore_screen(c); |
1da177e4 LT |
1312 | oldo = c->vc_origin; |
1313 | delta = lines * c->vc_size_row; | |
1314 | if (dir == SM_UP) { | |
15bdab95 | 1315 | vgacon_scrollback_update(c, t, lines); |
1da177e4 LT |
1316 | if (c->vc_scr_end + delta >= vga_vram_end) { |
1317 | scr_memcpyw((u16 *) vga_vram_base, | |
1318 | (u16 *) (oldo + delta), | |
1319 | c->vc_screenbuf_size - delta); | |
1320 | c->vc_origin = vga_vram_base; | |
1321 | vga_rolled_over = oldo - vga_vram_base; | |
1322 | } else | |
1323 | c->vc_origin += delta; | |
1324 | scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - | |
1325 | delta), c->vc_video_erase_char, | |
1326 | delta); | |
1327 | } else { | |
1328 | if (oldo - delta < vga_vram_base) { | |
1329 | scr_memmovew((u16 *) (vga_vram_end - | |
1330 | c->vc_screenbuf_size + | |
1331 | delta), (u16 *) oldo, | |
1332 | c->vc_screenbuf_size - delta); | |
1333 | c->vc_origin = vga_vram_end - c->vc_screenbuf_size; | |
1334 | vga_rolled_over = 0; | |
1335 | } else | |
1336 | c->vc_origin -= delta; | |
1337 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
1338 | scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, | |
1339 | delta); | |
1340 | } | |
1341 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
1342 | c->vc_visible_origin = c->vc_origin; | |
1343 | vga_set_mem_top(c); | |
1344 | c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; | |
1345 | return 1; | |
1346 | } | |
1347 | ||
1348 | ||
1349 | /* | |
1350 | * The console `switch' structure for the VGA based console | |
1351 | */ | |
1352 | ||
1353 | static int vgacon_dummy(struct vc_data *c) | |
1354 | { | |
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | #define DUMMY (void *) vgacon_dummy | |
1359 | ||
1360 | const struct consw vga_con = { | |
1361 | .owner = THIS_MODULE, | |
1362 | .con_startup = vgacon_startup, | |
1363 | .con_init = vgacon_init, | |
1364 | .con_deinit = vgacon_deinit, | |
1365 | .con_clear = DUMMY, | |
1366 | .con_putc = DUMMY, | |
1367 | .con_putcs = DUMMY, | |
1368 | .con_cursor = vgacon_cursor, | |
1369 | .con_scroll = vgacon_scroll, | |
1370 | .con_bmove = DUMMY, | |
1371 | .con_switch = vgacon_switch, | |
1372 | .con_blank = vgacon_blank, | |
1373 | .con_font_set = vgacon_font_set, | |
1374 | .con_font_get = vgacon_font_get, | |
28254d43 | 1375 | .con_resize = vgacon_resize, |
1da177e4 LT |
1376 | .con_set_palette = vgacon_set_palette, |
1377 | .con_scrolldelta = vgacon_scrolldelta, | |
1378 | .con_set_origin = vgacon_set_origin, | |
1379 | .con_save_screen = vgacon_save_screen, | |
1380 | .con_build_attr = vgacon_build_attr, | |
1381 | .con_invert_region = vgacon_invert_region, | |
1382 | }; | |
1383 | ||
1384 | MODULE_LICENSE("GPL"); |