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Commit | Line | Data |
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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 | ||
1da177e4 LT |
36 | #include <linux/module.h> |
37 | #include <linux/types.h> | |
1da177e4 LT |
38 | #include <linux/fs.h> |
39 | #include <linux/kernel.h> | |
1da177e4 LT |
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> | |
0ab3691f | 45 | #include <linux/sched.h> |
1da177e4 LT |
46 | #include <linux/selection.h> |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/ioport.h> | |
49 | #include <linux/init.h> | |
894673ee | 50 | #include <linux/screen_info.h> |
1da177e4 LT |
51 | #include <video/vga.h> |
52 | #include <asm/io.h> | |
53 | ||
6b2c1800 | 54 | static DEFINE_RAW_SPINLOCK(vga_lock); |
1da177e4 LT |
55 | static int cursor_size_lastfrom; |
56 | static int cursor_size_lastto; | |
53dbb26d AD |
57 | static u32 vgacon_xres; |
58 | static u32 vgacon_yres; | |
89f0244e | 59 | static struct vgastate vgastate; |
1da177e4 LT |
60 | |
61 | #define BLANK 0x0020 | |
62 | ||
53dbb26d | 63 | #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ |
1da177e4 LT |
64 | /* |
65 | * Interface used by the world | |
66 | */ | |
67 | ||
68 | static const char *vgacon_startup(void); | |
69 | static void vgacon_init(struct vc_data *c, int init); | |
70 | static void vgacon_deinit(struct vc_data *c); | |
71 | static void vgacon_cursor(struct vc_data *c, int mode); | |
72 | static int vgacon_switch(struct vc_data *c); | |
73 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch); | |
97293de9 | 74 | static void vgacon_scrolldelta(struct vc_data *c, int lines); |
1da177e4 LT |
75 | static int vgacon_set_origin(struct vc_data *c); |
76 | static void vgacon_save_screen(struct vc_data *c); | |
1da177e4 | 77 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count); |
e4bdab70 | 78 | static struct uni_pagedir *vgacon_uni_pagedir; |
0f2893f0 | 79 | static int vgacon_refcount; |
1da177e4 | 80 | |
1da177e4 | 81 | /* Description of the hardware situation */ |
96fd9554 | 82 | static bool vga_init_done; |
0128beee HD |
83 | static unsigned long vga_vram_base __read_mostly; /* Base of video memory */ |
84 | static unsigned long vga_vram_end __read_mostly; /* End of video memory */ | |
85 | static unsigned int vga_vram_size __read_mostly; /* Size of video memory */ | |
86 | static u16 vga_video_port_reg __read_mostly; /* Video register select port */ | |
87 | static u16 vga_video_port_val __read_mostly; /* Video register value port */ | |
88 | static unsigned int vga_video_num_columns; /* Number of text columns */ | |
89 | static unsigned int vga_video_num_lines; /* Number of text lines */ | |
96fd9554 | 90 | static bool vga_can_do_color; /* Do we support colors? */ |
0128beee HD |
91 | static unsigned int vga_default_font_height __read_mostly; /* Height of default screen font */ |
92 | static unsigned char vga_video_type __read_mostly; /* Card type */ | |
96fd9554 | 93 | static bool vga_font_is_default = true; |
1da177e4 | 94 | static int vga_vesa_blanked; |
96fd9554 JS |
95 | static bool vga_palette_blanked; |
96 | static bool vga_is_gfx; | |
97 | static bool vga_512_chars; | |
1da177e4 | 98 | static int vga_video_font_height; |
0128beee HD |
99 | static int vga_scan_lines __read_mostly; |
100 | static unsigned int vga_rolled_over; | |
1da177e4 | 101 | |
96fd9554 JS |
102 | static bool vgacon_text_mode_force; |
103 | static bool vga_hardscroll_enabled; | |
104 | static bool vga_hardscroll_user_enable = true; | |
f453ba04 DA |
105 | |
106 | bool vgacon_text_force(void) | |
107 | { | |
96fd9554 | 108 | return vgacon_text_mode_force; |
f453ba04 DA |
109 | } |
110 | EXPORT_SYMBOL(vgacon_text_force); | |
111 | ||
112 | static int __init text_mode(char *str) | |
113 | { | |
96fd9554 | 114 | vgacon_text_mode_force = true; |
f453ba04 DA |
115 | return 1; |
116 | } | |
117 | ||
118 | /* force text mode - used by kernel modesetting */ | |
119 | __setup("nomodeset", text_mode); | |
120 | ||
1da177e4 LT |
121 | static int __init no_scroll(char *str) |
122 | { | |
123 | /* | |
124 | * Disabling scrollback is required for the Braillex ib80-piezo | |
125 | * Braille reader made by F.H. Papenmeier (Germany). | |
126 | * Use the "no-scroll" bootflag. | |
127 | */ | |
96fd9554 | 128 | vga_hardscroll_user_enable = vga_hardscroll_enabled = false; |
1da177e4 LT |
129 | return 1; |
130 | } | |
131 | ||
132 | __setup("no-scroll", no_scroll); | |
133 | ||
134 | /* | |
135 | * By replacing the four outb_p with two back to back outw, we can reduce | |
136 | * the window of opportunity to see text mislocated to the RHS of the | |
137 | * console during heavy scrolling activity. However there is the remote | |
138 | * possibility that some pre-dinosaur hardware won't like the back to back | |
139 | * I/O. Since the Xservers get away with it, we should be able to as well. | |
140 | */ | |
141 | static inline void write_vga(unsigned char reg, unsigned int val) | |
142 | { | |
143 | unsigned int v1, v2; | |
144 | unsigned long flags; | |
145 | ||
146 | /* | |
147 | * ddprintk might set the console position from interrupt | |
148 | * handlers, thus the write has to be IRQ-atomic. | |
149 | */ | |
6b2c1800 | 150 | raw_spin_lock_irqsave(&vga_lock, flags); |
1da177e4 LT |
151 | v1 = reg + (val & 0xff00); |
152 | v2 = reg + 1 + ((val << 8) & 0xff00); | |
153 | outw(v1, vga_video_port_reg); | |
154 | outw(v2, vga_video_port_reg); | |
6b2c1800 | 155 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
1da177e4 LT |
156 | } |
157 | ||
15bdab95 AD |
158 | static inline void vga_set_mem_top(struct vc_data *c) |
159 | { | |
160 | write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2); | |
161 | } | |
162 | ||
163 | #ifdef CONFIG_VGACON_SOFT_SCROLLBACK | |
15bdab95 | 164 | /* software scrollback */ |
aabd31c4 | 165 | struct vgacon_scrollback_info { |
66da39eb MS |
166 | void *data; |
167 | int tail; | |
168 | int size; | |
169 | int rows; | |
170 | int cnt; | |
171 | int cur; | |
172 | int save; | |
173 | int restore; | |
aabd31c4 | 174 | }; |
15bdab95 | 175 | |
aabd31c4 | 176 | static struct vgacon_scrollback_info *vgacon_scrollback_cur; |
aabd31c4 | 177 | static struct vgacon_scrollback_info vgacon_scrollbacks[MAX_NR_CONSOLES]; |
1a336c93 MS |
178 | static bool scrollback_persistent = \ |
179 | IS_ENABLED(CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT); | |
180 | module_param_named(scrollback_persistent, scrollback_persistent, bool, 0000); | |
181 | MODULE_PARM_DESC(scrollback_persistent, "Enable persistent scrollback for all vga consoles"); | |
aabd31c4 MS |
182 | |
183 | static void vgacon_scrollback_reset(int vc_num, size_t reset_size) | |
184 | { | |
185 | struct vgacon_scrollback_info *scrollback = &vgacon_scrollbacks[vc_num]; | |
186 | ||
187 | if (scrollback->data && reset_size > 0) | |
188 | memset(scrollback->data, 0, reset_size); | |
189 | ||
190 | scrollback->cnt = 0; | |
191 | scrollback->tail = 0; | |
192 | scrollback->cur = 0; | |
193 | } | |
194 | ||
195 | static void vgacon_scrollback_init(int vc_num) | |
bcd375f7 | 196 | { |
aabd31c4 MS |
197 | int pitch = vga_video_num_columns * 2; |
198 | size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024; | |
199 | int rows = size / pitch; | |
200 | void *data; | |
bcd375f7 | 201 | |
aabd31c4 MS |
202 | data = kmalloc_array(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024, |
203 | GFP_NOWAIT); | |
204 | ||
205 | vgacon_scrollbacks[vc_num].data = data; | |
206 | vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num]; | |
207 | ||
208 | vgacon_scrollback_cur->rows = rows - 1; | |
209 | vgacon_scrollback_cur->size = rows * pitch; | |
210 | ||
211 | vgacon_scrollback_reset(vc_num, size); | |
bcd375f7 MS |
212 | } |
213 | ||
aabd31c4 | 214 | static void vgacon_scrollback_switch(int vc_num) |
15bdab95 | 215 | { |
1a336c93 MS |
216 | if (!scrollback_persistent) |
217 | vc_num = 0; | |
aabd31c4 MS |
218 | |
219 | if (!vgacon_scrollbacks[vc_num].data) { | |
220 | vgacon_scrollback_init(vc_num); | |
221 | } else { | |
1a336c93 MS |
222 | if (scrollback_persistent) { |
223 | vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num]; | |
224 | } else { | |
225 | size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024; | |
aabd31c4 | 226 | |
1a336c93 MS |
227 | vgacon_scrollback_reset(vc_num, size); |
228 | } | |
15bdab95 AD |
229 | } |
230 | } | |
231 | ||
63b1dd07 | 232 | static void vgacon_scrollback_startup(void) |
15bdab95 | 233 | { |
aabd31c4 MS |
234 | vgacon_scrollback_cur = &vgacon_scrollbacks[0]; |
235 | vgacon_scrollback_init(0); | |
15bdab95 AD |
236 | } |
237 | ||
238 | static void vgacon_scrollback_update(struct vc_data *c, int t, int count) | |
239 | { | |
240 | void *p; | |
241 | ||
aabd31c4 MS |
242 | if (!vgacon_scrollback_cur->data || !vgacon_scrollback_cur->size || |
243 | c->vc_num != fg_console) | |
15bdab95 AD |
244 | return; |
245 | ||
246 | p = (void *) (c->vc_origin + t * c->vc_size_row); | |
247 | ||
248 | while (count--) { | |
aabd31c4 MS |
249 | scr_memcpyw(vgacon_scrollback_cur->data + |
250 | vgacon_scrollback_cur->tail, | |
15bdab95 | 251 | p, c->vc_size_row); |
aabd31c4 MS |
252 | |
253 | vgacon_scrollback_cur->cnt++; | |
15bdab95 | 254 | p += c->vc_size_row; |
aabd31c4 | 255 | vgacon_scrollback_cur->tail += c->vc_size_row; |
15bdab95 | 256 | |
aabd31c4 MS |
257 | if (vgacon_scrollback_cur->tail >= vgacon_scrollback_cur->size) |
258 | vgacon_scrollback_cur->tail = 0; | |
15bdab95 | 259 | |
aabd31c4 MS |
260 | if (vgacon_scrollback_cur->cnt > vgacon_scrollback_cur->rows) |
261 | vgacon_scrollback_cur->cnt = vgacon_scrollback_cur->rows; | |
15bdab95 | 262 | |
aabd31c4 | 263 | vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt; |
15bdab95 AD |
264 | } |
265 | } | |
266 | ||
267 | static void vgacon_restore_screen(struct vc_data *c) | |
268 | { | |
aabd31c4 | 269 | vgacon_scrollback_cur->save = 0; |
15bdab95 | 270 | |
aabd31c4 | 271 | if (!vga_is_gfx && !vgacon_scrollback_cur->restore) { |
15bdab95 AD |
272 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
273 | c->vc_screenbuf_size > vga_vram_size ? | |
274 | vga_vram_size : c->vc_screenbuf_size); | |
aabd31c4 MS |
275 | vgacon_scrollback_cur->restore = 1; |
276 | vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt; | |
15bdab95 AD |
277 | } |
278 | } | |
279 | ||
97293de9 | 280 | static void vgacon_scrolldelta(struct vc_data *c, int lines) |
15bdab95 | 281 | { |
5ab48409 | 282 | int start, end, count, soff; |
15bdab95 AD |
283 | |
284 | if (!lines) { | |
285 | c->vc_visible_origin = c->vc_origin; | |
286 | vga_set_mem_top(c); | |
97293de9 | 287 | return; |
15bdab95 AD |
288 | } |
289 | ||
aabd31c4 | 290 | if (!vgacon_scrollback_cur->data) |
97293de9 | 291 | return; |
15bdab95 | 292 | |
aabd31c4 | 293 | if (!vgacon_scrollback_cur->save) { |
15bdab95 AD |
294 | vgacon_cursor(c, CM_ERASE); |
295 | vgacon_save_screen(c); | |
aabd31c4 | 296 | vgacon_scrollback_cur->save = 1; |
15bdab95 AD |
297 | } |
298 | ||
aabd31c4 MS |
299 | vgacon_scrollback_cur->restore = 0; |
300 | start = vgacon_scrollback_cur->cur + lines; | |
15bdab95 AD |
301 | end = start + abs(lines); |
302 | ||
303 | if (start < 0) | |
304 | start = 0; | |
305 | ||
aabd31c4 MS |
306 | if (start > vgacon_scrollback_cur->cnt) |
307 | start = vgacon_scrollback_cur->cnt; | |
15bdab95 AD |
308 | |
309 | if (end < 0) | |
310 | end = 0; | |
311 | ||
aabd31c4 MS |
312 | if (end > vgacon_scrollback_cur->cnt) |
313 | end = vgacon_scrollback_cur->cnt; | |
15bdab95 | 314 | |
aabd31c4 | 315 | vgacon_scrollback_cur->cur = start; |
15bdab95 | 316 | count = end - start; |
aabd31c4 MS |
317 | soff = vgacon_scrollback_cur->tail - |
318 | ((vgacon_scrollback_cur->cnt - end) * c->vc_size_row); | |
15bdab95 AD |
319 | soff -= count * c->vc_size_row; |
320 | ||
321 | if (soff < 0) | |
aabd31c4 | 322 | soff += vgacon_scrollback_cur->size; |
15bdab95 | 323 | |
aabd31c4 | 324 | count = vgacon_scrollback_cur->cnt - start; |
15bdab95 AD |
325 | |
326 | if (count > c->vc_rows) | |
327 | count = c->vc_rows; | |
328 | ||
c38182a7 MS |
329 | if (count) { |
330 | int copysize; | |
5ab48409 MS |
331 | |
332 | int diff = c->vc_rows - count; | |
333 | void *d = (void *) c->vc_origin; | |
334 | void *s = (void *) c->vc_screenbuf; | |
335 | ||
c38182a7 MS |
336 | count *= c->vc_size_row; |
337 | /* how much memory to end of buffer left? */ | |
aabd31c4 MS |
338 | copysize = min(count, vgacon_scrollback_cur->size - soff); |
339 | scr_memcpyw(d, vgacon_scrollback_cur->data + soff, copysize); | |
c38182a7 MS |
340 | d += copysize; |
341 | count -= copysize; | |
342 | ||
343 | if (count) { | |
aabd31c4 | 344 | scr_memcpyw(d, vgacon_scrollback_cur->data, count); |
c38182a7 MS |
345 | d += count; |
346 | } | |
15bdab95 | 347 | |
c38182a7 MS |
348 | if (diff) |
349 | scr_memcpyw(d, s, diff * c->vc_size_row); | |
5ab48409 MS |
350 | } else |
351 | vgacon_cursor(c, CM_MOVE); | |
15bdab95 | 352 | } |
bcd375f7 MS |
353 | |
354 | static void vgacon_flush_scrollback(struct vc_data *c) | |
355 | { | |
356 | size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024; | |
357 | ||
aabd31c4 | 358 | vgacon_scrollback_reset(c->vc_num, size); |
bcd375f7 | 359 | } |
15bdab95 AD |
360 | #else |
361 | #define vgacon_scrollback_startup(...) do { } while (0) | |
362 | #define vgacon_scrollback_init(...) do { } while (0) | |
363 | #define vgacon_scrollback_update(...) do { } while (0) | |
aabd31c4 | 364 | #define vgacon_scrollback_switch(...) do { } while (0) |
15bdab95 AD |
365 | |
366 | static void vgacon_restore_screen(struct vc_data *c) | |
367 | { | |
368 | if (c->vc_origin != c->vc_visible_origin) | |
369 | vgacon_scrolldelta(c, 0); | |
370 | } | |
371 | ||
97293de9 | 372 | static void vgacon_scrolldelta(struct vc_data *c, int lines) |
15bdab95 | 373 | { |
35cc56f9 JS |
374 | vc_scrolldelta_helper(c, lines, vga_rolled_over, (void *)vga_vram_base, |
375 | vga_vram_size); | |
15bdab95 | 376 | vga_set_mem_top(c); |
15bdab95 | 377 | } |
bcd375f7 MS |
378 | |
379 | static void vgacon_flush_scrollback(struct vc_data *c) | |
380 | { | |
381 | } | |
15bdab95 AD |
382 | #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ |
383 | ||
50ec42ed | 384 | static const char *vgacon_startup(void) |
1da177e4 LT |
385 | { |
386 | const char *display_desc = NULL; | |
387 | u16 saved1, saved2; | |
388 | volatile u16 *p; | |
389 | ||
554ec37a YH |
390 | if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB || |
391 | screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { | |
1da177e4 LT |
392 | no_vga: |
393 | #ifdef CONFIG_DUMMY_CONSOLE | |
394 | conswitchp = &dummy_con; | |
395 | return conswitchp->con_startup(); | |
396 | #else | |
397 | return NULL; | |
398 | #endif | |
399 | } | |
400 | ||
b9a58de5 JS |
401 | /* boot_params.screen_info reasonably initialized? */ |
402 | if ((screen_info.orig_video_lines == 0) || | |
3ea33510 | 403 | (screen_info.orig_video_cols == 0)) |
a1a4849c GH |
404 | goto no_vga; |
405 | ||
1da177e4 | 406 | /* VGA16 modes are not handled by VGACON */ |
3ea33510 PA |
407 | if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ |
408 | (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ | |
409 | (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ | |
410 | (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ | |
411 | (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ | |
1da177e4 LT |
412 | goto no_vga; |
413 | ||
3ea33510 PA |
414 | vga_video_num_lines = screen_info.orig_video_lines; |
415 | vga_video_num_columns = screen_info.orig_video_cols; | |
89f0244e | 416 | vgastate.vgabase = NULL; |
1da177e4 | 417 | |
3ea33510 PA |
418 | if (screen_info.orig_video_mode == 7) { |
419 | /* Monochrome display */ | |
1da177e4 LT |
420 | vga_vram_base = 0xb0000; |
421 | vga_video_port_reg = VGA_CRT_IM; | |
422 | vga_video_port_val = VGA_CRT_DM; | |
3ea33510 | 423 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
1da177e4 | 424 | static struct resource ega_console_resource = |
740e518e | 425 | { .name = "ega", .start = 0x3B0, .end = 0x3BF }; |
1da177e4 | 426 | vga_video_type = VIDEO_TYPE_EGAM; |
4f1bcaf0 | 427 | vga_vram_size = 0x8000; |
1da177e4 LT |
428 | display_desc = "EGA+"; |
429 | request_resource(&ioport_resource, | |
430 | &ega_console_resource); | |
431 | } else { | |
432 | static struct resource mda1_console_resource = | |
740e518e | 433 | { .name = "mda", .start = 0x3B0, .end = 0x3BB }; |
1da177e4 | 434 | static struct resource mda2_console_resource = |
740e518e | 435 | { .name = "mda", .start = 0x3BF, .end = 0x3BF }; |
1da177e4 | 436 | vga_video_type = VIDEO_TYPE_MDA; |
4f1bcaf0 | 437 | vga_vram_size = 0x2000; |
1da177e4 LT |
438 | display_desc = "*MDA"; |
439 | request_resource(&ioport_resource, | |
440 | &mda1_console_resource); | |
441 | request_resource(&ioport_resource, | |
442 | &mda2_console_resource); | |
443 | vga_video_font_height = 14; | |
444 | } | |
445 | } else { | |
446 | /* If not, it is color. */ | |
96fd9554 | 447 | vga_can_do_color = true; |
1da177e4 LT |
448 | vga_vram_base = 0xb8000; |
449 | vga_video_port_reg = VGA_CRT_IC; | |
450 | vga_video_port_val = VGA_CRT_DC; | |
3ea33510 | 451 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
1da177e4 LT |
452 | int i; |
453 | ||
4f1bcaf0 | 454 | vga_vram_size = 0x8000; |
1da177e4 | 455 | |
3ea33510 | 456 | if (!screen_info.orig_video_isVGA) { |
1da177e4 | 457 | static struct resource ega_console_resource |
740e518e | 458 | = { .name = "ega", .start = 0x3C0, .end = 0x3DF }; |
1da177e4 LT |
459 | vga_video_type = VIDEO_TYPE_EGAC; |
460 | display_desc = "EGA"; | |
461 | request_resource(&ioport_resource, | |
462 | &ega_console_resource); | |
463 | } else { | |
464 | static struct resource vga_console_resource | |
740e518e | 465 | = { .name = "vga+", .start = 0x3C0, .end = 0x3DF }; |
1da177e4 LT |
466 | vga_video_type = VIDEO_TYPE_VGAC; |
467 | display_desc = "VGA+"; | |
468 | request_resource(&ioport_resource, | |
469 | &vga_console_resource); | |
470 | ||
1da177e4 LT |
471 | /* |
472 | * Normalise the palette registers, to point | |
473 | * the 16 screen colours to the first 16 | |
474 | * DAC entries. | |
475 | */ | |
476 | ||
477 | for (i = 0; i < 16; i++) { | |
478 | inb_p(VGA_IS1_RC); | |
479 | outb_p(i, VGA_ATT_W); | |
480 | outb_p(i, VGA_ATT_W); | |
481 | } | |
482 | outb_p(0x20, VGA_ATT_W); | |
483 | ||
484 | /* | |
485 | * Now set the DAC registers back to their | |
486 | * default values | |
487 | */ | |
488 | for (i = 0; i < 16; i++) { | |
489 | outb_p(color_table[i], VGA_PEL_IW); | |
490 | outb_p(default_red[i], VGA_PEL_D); | |
491 | outb_p(default_grn[i], VGA_PEL_D); | |
492 | outb_p(default_blu[i], VGA_PEL_D); | |
493 | } | |
494 | } | |
495 | } else { | |
496 | static struct resource cga_console_resource = | |
740e518e | 497 | { .name = "cga", .start = 0x3D4, .end = 0x3D5 }; |
1da177e4 | 498 | vga_video_type = VIDEO_TYPE_CGA; |
4f1bcaf0 | 499 | vga_vram_size = 0x2000; |
1da177e4 LT |
500 | display_desc = "*CGA"; |
501 | request_resource(&ioport_resource, | |
502 | &cga_console_resource); | |
503 | vga_video_font_height = 8; | |
504 | } | |
505 | } | |
506 | ||
4f1bcaf0 BH |
507 | vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); |
508 | vga_vram_end = vga_vram_base + vga_vram_size; | |
1da177e4 LT |
509 | |
510 | /* | |
511 | * Find out if there is a graphics card present. | |
512 | * Are there smarter methods around? | |
513 | */ | |
514 | p = (volatile u16 *) vga_vram_base; | |
515 | saved1 = scr_readw(p); | |
516 | saved2 = scr_readw(p + 1); | |
517 | scr_writew(0xAA55, p); | |
518 | scr_writew(0x55AA, p + 1); | |
519 | if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { | |
520 | scr_writew(saved1, p); | |
521 | scr_writew(saved2, p + 1); | |
522 | goto no_vga; | |
523 | } | |
524 | scr_writew(0x55AA, p); | |
525 | scr_writew(0xAA55, p + 1); | |
526 | if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { | |
527 | scr_writew(saved1, p); | |
528 | scr_writew(saved2, p + 1); | |
529 | goto no_vga; | |
530 | } | |
531 | scr_writew(saved1, p); | |
532 | scr_writew(saved2, p + 1); | |
533 | ||
534 | if (vga_video_type == VIDEO_TYPE_EGAC | |
535 | || vga_video_type == VIDEO_TYPE_VGAC | |
536 | || vga_video_type == VIDEO_TYPE_EGAM) { | |
537 | vga_hardscroll_enabled = vga_hardscroll_user_enable; | |
3ea33510 PA |
538 | vga_default_font_height = screen_info.orig_video_points; |
539 | vga_video_font_height = screen_info.orig_video_points; | |
1da177e4 LT |
540 | /* This may be suboptimal but is a safe bet - go with it */ |
541 | vga_scan_lines = | |
542 | vga_video_font_height * vga_video_num_lines; | |
543 | } | |
53dbb26d | 544 | |
3ea33510 | 545 | vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; |
53dbb26d | 546 | vgacon_yres = vga_scan_lines; |
50ec42ed AD |
547 | |
548 | if (!vga_init_done) { | |
549 | vgacon_scrollback_startup(); | |
96fd9554 | 550 | vga_init_done = true; |
50ec42ed AD |
551 | } |
552 | ||
1da177e4 LT |
553 | return display_desc; |
554 | } | |
555 | ||
556 | static void vgacon_init(struct vc_data *c, int init) | |
557 | { | |
e4bdab70 | 558 | struct uni_pagedir *p; |
1da177e4 | 559 | |
50ec42ed AD |
560 | /* |
561 | * We cannot be loaded as a module, therefore init is always 1, | |
562 | * but vgacon_init can be called more than once, and init will | |
563 | * not be 1. | |
564 | */ | |
1da177e4 | 565 | c->vc_can_do_color = vga_can_do_color; |
50ec42ed AD |
566 | |
567 | /* set dimensions manually if init != 0 since vc_resize() will fail */ | |
568 | if (init) { | |
569 | c->vc_cols = vga_video_num_columns; | |
570 | c->vc_rows = vga_video_num_lines; | |
571 | } else | |
572 | vc_resize(c, vga_video_num_columns, vga_video_num_lines); | |
573 | ||
1da177e4 LT |
574 | c->vc_scan_lines = vga_scan_lines; |
575 | c->vc_font.height = vga_video_font_height; | |
576 | c->vc_complement_mask = 0x7700; | |
a40920b4 BN |
577 | if (vga_512_chars) |
578 | c->vc_hi_font_mask = 0x0800; | |
1da177e4 | 579 | p = *c->vc_uni_pagedir_loc; |
0f2893f0 | 580 | if (c->vc_uni_pagedir_loc != &vgacon_uni_pagedir) { |
1da177e4 | 581 | con_free_unimap(c); |
0f2893f0 TI |
582 | c->vc_uni_pagedir_loc = &vgacon_uni_pagedir; |
583 | vgacon_refcount++; | |
584 | } | |
585 | if (!vgacon_uni_pagedir && p) | |
1da177e4 | 586 | con_set_default_unimap(c); |
f6c06b68 | 587 | |
b434a680 MG |
588 | /* Only set the default if the user didn't deliberately override it */ |
589 | if (global_cursor_default == -1) | |
590 | global_cursor_default = | |
591 | !(screen_info.flags & VIDEO_FLAGS_NOCURSOR); | |
1da177e4 LT |
592 | } |
593 | ||
1da177e4 LT |
594 | static void vgacon_deinit(struct vc_data *c) |
595 | { | |
f0c7d2b7 | 596 | /* When closing the active console, reset video origin */ |
6ca8dfd7 | 597 | if (con_is_visible(c)) { |
1da177e4 LT |
598 | c->vc_visible_origin = vga_vram_base; |
599 | vga_set_mem_top(c); | |
1da177e4 | 600 | } |
f0c7d2b7 | 601 | |
0f2893f0 | 602 | if (!--vgacon_refcount) |
f0c7d2b7 | 603 | con_free_unimap(c); |
1da177e4 LT |
604 | c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; |
605 | con_set_default_unimap(c); | |
606 | } | |
607 | ||
608 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, | |
fa6ce9ab | 609 | u8 blink, u8 underline, u8 reverse, u8 italic) |
1da177e4 LT |
610 | { |
611 | u8 attr = color; | |
612 | ||
613 | if (vga_can_do_color) { | |
fa6ce9ab JE |
614 | if (italic) |
615 | attr = (attr & 0xF0) | c->vc_itcolor; | |
616 | else if (underline) | |
1da177e4 LT |
617 | attr = (attr & 0xf0) | c->vc_ulcolor; |
618 | else if (intensity == 0) | |
619 | attr = (attr & 0xf0) | c->vc_halfcolor; | |
620 | } | |
621 | if (reverse) | |
622 | attr = | |
623 | ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & | |
624 | 0x77); | |
625 | if (blink) | |
626 | attr ^= 0x80; | |
627 | if (intensity == 2) | |
628 | attr ^= 0x08; | |
629 | if (!vga_can_do_color) { | |
fa6ce9ab JE |
630 | if (italic) |
631 | attr = (attr & 0xF8) | 0x02; | |
632 | else if (underline) | |
1da177e4 LT |
633 | attr = (attr & 0xf8) | 0x01; |
634 | else if (intensity == 0) | |
635 | attr = (attr & 0xf0) | 0x08; | |
636 | } | |
637 | return attr; | |
638 | } | |
639 | ||
640 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) | |
641 | { | |
96fd9554 | 642 | const bool col = vga_can_do_color; |
1da177e4 LT |
643 | |
644 | while (count--) { | |
645 | u16 a = scr_readw(p); | |
646 | if (col) | |
647 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | | |
648 | (((a) & 0x0700) << 4); | |
649 | else | |
650 | a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; | |
651 | scr_writew(a, p++); | |
652 | } | |
653 | } | |
654 | ||
655 | static void vgacon_set_cursor_size(int xpos, int from, int to) | |
656 | { | |
657 | unsigned long flags; | |
658 | int curs, cure; | |
659 | ||
1da177e4 LT |
660 | if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) |
661 | return; | |
662 | cursor_size_lastfrom = from; | |
663 | cursor_size_lastto = to; | |
664 | ||
6b2c1800 | 665 | raw_spin_lock_irqsave(&vga_lock, flags); |
2115aea8 ST |
666 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
667 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); | |
668 | curs = inb_p(vga_video_port_val); | |
669 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); | |
670 | cure = inb_p(vga_video_port_val); | |
671 | } else { | |
672 | curs = 0; | |
673 | cure = 0; | |
674 | } | |
1da177e4 LT |
675 | |
676 | curs = (curs & 0xc0) | from; | |
677 | cure = (cure & 0xe0) | to; | |
678 | ||
2115aea8 | 679 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
1da177e4 | 680 | outb_p(curs, vga_video_port_val); |
2115aea8 | 681 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
1da177e4 | 682 | outb_p(cure, vga_video_port_val); |
6b2c1800 | 683 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
1da177e4 LT |
684 | } |
685 | ||
686 | static void vgacon_cursor(struct vc_data *c, int mode) | |
687 | { | |
2ae85477 AD |
688 | if (c->vc_mode != KD_TEXT) |
689 | return; | |
690 | ||
15bdab95 AD |
691 | vgacon_restore_screen(c); |
692 | ||
1da177e4 LT |
693 | switch (mode) { |
694 | case CM_ERASE: | |
88dcb6c4 | 695 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
2115aea8 ST |
696 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
697 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
698 | else | |
699 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
700 | break; |
701 | ||
702 | case CM_MOVE: | |
703 | case CM_DRAW: | |
704 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); | |
705 | switch (c->vc_cursor_type & 0x0f) { | |
706 | case CUR_UNDERLINE: | |
707 | vgacon_set_cursor_size(c->vc_x, | |
708 | c->vc_font.height - | |
709 | (c->vc_font.height < | |
710 | 10 ? 2 : 3), | |
711 | c->vc_font.height - | |
712 | (c->vc_font.height < | |
713 | 10 ? 1 : 2)); | |
714 | break; | |
715 | case CUR_TWO_THIRDS: | |
716 | vgacon_set_cursor_size(c->vc_x, | |
717 | c->vc_font.height / 3, | |
718 | c->vc_font.height - | |
719 | (c->vc_font.height < | |
720 | 10 ? 1 : 2)); | |
721 | break; | |
722 | case CUR_LOWER_THIRD: | |
723 | vgacon_set_cursor_size(c->vc_x, | |
724 | (c->vc_font.height * 2) / 3, | |
725 | c->vc_font.height - | |
726 | (c->vc_font.height < | |
727 | 10 ? 1 : 2)); | |
728 | break; | |
729 | case CUR_LOWER_HALF: | |
730 | vgacon_set_cursor_size(c->vc_x, | |
731 | c->vc_font.height / 2, | |
732 | c->vc_font.height - | |
733 | (c->vc_font.height < | |
734 | 10 ? 1 : 2)); | |
735 | break; | |
736 | case CUR_NONE: | |
2115aea8 ST |
737 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
738 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
739 | else | |
740 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
741 | break; |
742 | default: | |
743 | vgacon_set_cursor_size(c->vc_x, 1, | |
744 | c->vc_font.height); | |
745 | break; | |
746 | } | |
747 | break; | |
748 | } | |
749 | } | |
750 | ||
28254d43 ST |
751 | static int vgacon_doresize(struct vc_data *c, |
752 | unsigned int width, unsigned int height) | |
753 | { | |
754 | unsigned long flags; | |
755 | unsigned int scanlines = height * c->vc_font.height; | |
d1521260 | 756 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
28254d43 | 757 | |
6b2c1800 | 758 | raw_spin_lock_irqsave(&vga_lock, flags); |
28254d43 | 759 | |
53dbb26d AD |
760 | vgacon_xres = width * VGA_FONTWIDTH; |
761 | vgacon_yres = height * c->vc_font.height; | |
d1521260 ST |
762 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
763 | outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); | |
764 | max_scan = inb_p(vga_video_port_val); | |
28254d43 | 765 | |
d1521260 ST |
766 | if (max_scan & 0x80) |
767 | scanlines <<= 1; | |
28254d43 | 768 | |
d1521260 ST |
769 | outb_p(VGA_CRTC_MODE, vga_video_port_reg); |
770 | mode = inb_p(vga_video_port_val); | |
28254d43 | 771 | |
d1521260 ST |
772 | if (mode & 0x04) |
773 | scanlines >>= 1; | |
28254d43 | 774 | |
d1521260 ST |
775 | scanlines -= 1; |
776 | scanlines_lo = scanlines & 0xff; | |
28254d43 | 777 | |
d1521260 ST |
778 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); |
779 | r7 = inb_p(vga_video_port_val) & ~0x42; | |
780 | ||
781 | if (scanlines & 0x100) | |
782 | r7 |= 0x02; | |
783 | if (scanlines & 0x200) | |
784 | r7 |= 0x40; | |
785 | ||
786 | /* deprotect registers */ | |
787 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
788 | vsync_end = inb_p(vga_video_port_val); | |
789 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
790 | outb_p(vsync_end & ~0x80, vga_video_port_val); | |
791 | } | |
28254d43 ST |
792 | |
793 | outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); | |
794 | outb_p(width - 1, vga_video_port_val); | |
795 | outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); | |
796 | outb_p(width >> 1, vga_video_port_val); | |
797 | ||
d1521260 ST |
798 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
799 | outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); | |
800 | outb_p(scanlines_lo, vga_video_port_val); | |
801 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); | |
802 | outb_p(r7,vga_video_port_val); | |
28254d43 | 803 | |
d1521260 ST |
804 | /* reprotect registers */ |
805 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
806 | outb_p(vsync_end, vga_video_port_val); | |
807 | } | |
28254d43 | 808 | |
6b2c1800 | 809 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
28254d43 ST |
810 | return 0; |
811 | } | |
812 | ||
1da177e4 LT |
813 | static int vgacon_switch(struct vc_data *c) |
814 | { | |
53dbb26d AD |
815 | int x = c->vc_cols * VGA_FONTWIDTH; |
816 | int y = c->vc_rows * c->vc_font.height; | |
3ea33510 | 817 | int rows = screen_info.orig_video_lines * vga_default_font_height/ |
53dbb26d | 818 | c->vc_font.height; |
1da177e4 LT |
819 | /* |
820 | * We need to save screen size here as it's the only way | |
821 | * we can spot the screen has been resized and we need to | |
822 | * set size of freshly allocated screens ourselves. | |
823 | */ | |
824 | vga_video_num_columns = c->vc_cols; | |
825 | vga_video_num_lines = c->vc_rows; | |
f18cd8f7 JS |
826 | |
827 | /* We can only copy out the size of the video buffer here, | |
828 | * otherwise we get into VGA BIOS */ | |
829 | ||
28254d43 | 830 | if (!vga_is_gfx) { |
1da177e4 | 831 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
28254d43 ST |
832 | c->vc_screenbuf_size > vga_vram_size ? |
833 | vga_vram_size : c->vc_screenbuf_size); | |
53dbb26d AD |
834 | |
835 | if ((vgacon_xres != x || vgacon_yres != y) && | |
836 | (!(vga_video_num_columns % 2) && | |
3ea33510 | 837 | vga_video_num_columns <= screen_info.orig_video_cols && |
53dbb26d | 838 | vga_video_num_lines <= rows)) |
0aec4867 | 839 | vgacon_doresize(c, c->vc_cols, c->vc_rows); |
28254d43 ST |
840 | } |
841 | ||
aabd31c4 | 842 | vgacon_scrollback_switch(c->vc_num); |
1da177e4 LT |
843 | return 0; /* Redrawing not needed */ |
844 | } | |
845 | ||
8ede5cce | 846 | static void vga_set_palette(struct vc_data *vc, const unsigned char *table) |
1da177e4 LT |
847 | { |
848 | int i, j; | |
849 | ||
89f0244e | 850 | vga_w(vgastate.vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 | 851 | for (i = j = 0; i < 16; i++) { |
89f0244e MR |
852 | vga_w(vgastate.vgabase, VGA_PEL_IW, table[i]); |
853 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
854 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
855 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
1da177e4 LT |
856 | } |
857 | } | |
858 | ||
709280da | 859 | static void vgacon_set_palette(struct vc_data *vc, const unsigned char *table) |
1da177e4 | 860 | { |
1da177e4 | 861 | if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked |
6ca8dfd7 | 862 | || !con_is_visible(vc)) |
709280da | 863 | return; |
1da177e4 | 864 | vga_set_palette(vc, table); |
1da177e4 LT |
865 | } |
866 | ||
867 | /* structure holding original VGA register settings */ | |
868 | static struct { | |
869 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ | |
870 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ | |
871 | unsigned char CrtMiscIO; /* Miscellaneous register */ | |
872 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ | |
873 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ | |
874 | unsigned char StartHorizRetrace; /* CRT-Controller:04h */ | |
875 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ | |
876 | unsigned char Overflow; /* CRT-Controller:07h */ | |
877 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ | |
878 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ | |
879 | unsigned char ModeControl; /* CRT-Controller:17h */ | |
880 | unsigned char ClockingMode; /* Seq-Controller:01h */ | |
881 | } vga_state; | |
882 | ||
883 | static void vga_vesa_blank(struct vgastate *state, int mode) | |
884 | { | |
885 | /* save original values of VGA controller registers */ | |
886 | if (!vga_vesa_blanked) { | |
6b2c1800 | 887 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
888 | vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I); |
889 | vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg); | |
890 | vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R); | |
6b2c1800 | 891 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
892 | |
893 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
894 | vga_state.HorizontalTotal = inb_p(vga_video_port_val); | |
895 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
896 | vga_state.HorizDisplayEnd = inb_p(vga_video_port_val); | |
897 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
898 | vga_state.StartHorizRetrace = inb_p(vga_video_port_val); | |
899 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
900 | vga_state.EndHorizRetrace = inb_p(vga_video_port_val); | |
901 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
902 | vga_state.Overflow = inb_p(vga_video_port_val); | |
903 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
904 | vga_state.StartVertRetrace = inb_p(vga_video_port_val); | |
905 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
906 | vga_state.EndVertRetrace = inb_p(vga_video_port_val); | |
907 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
908 | vga_state.ModeControl = inb_p(vga_video_port_val); | |
909 | vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); | |
910 | } | |
911 | ||
912 | /* assure that video is enabled */ | |
913 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ | |
6b2c1800 | 914 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
915 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20); |
916 | ||
917 | /* test for vertical retrace in process.... */ | |
918 | if ((vga_state.CrtMiscIO & 0x80) == 0x80) | |
919 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF); | |
920 | ||
921 | /* | |
922 | * Set <End of vertical retrace> to minimum (0) and | |
923 | * <Start of vertical Retrace> to maximum (incl. overflow) | |
924 | * Result: turn off vertical sync (VSync) pulse. | |
925 | */ | |
926 | if (mode & VESA_VSYNC_SUSPEND) { | |
927 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
928 | outb_p(0xff, vga_video_port_val); /* maximum value */ | |
929 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
930 | outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */ | |
931 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
932 | outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */ | |
933 | } | |
934 | ||
935 | if (mode & VESA_HSYNC_SUSPEND) { | |
936 | /* | |
937 | * Set <End of horizontal retrace> to minimum (0) and | |
938 | * <Start of horizontal Retrace> to maximum | |
939 | * Result: turn off horizontal sync (HSync) pulse. | |
940 | */ | |
941 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
942 | outb_p(0xff, vga_video_port_val); /* maximum */ | |
943 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
944 | outb_p(0x00, vga_video_port_val); /* minimum (0) */ | |
945 | } | |
946 | ||
947 | /* restore both index registers */ | |
948 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
949 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
6b2c1800 | 950 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
951 | } |
952 | ||
953 | static void vga_vesa_unblank(struct vgastate *state) | |
954 | { | |
955 | /* restore original values of VGA controller registers */ | |
6b2c1800 | 956 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
957 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO); |
958 | ||
959 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
960 | outb_p(vga_state.HorizontalTotal, vga_video_port_val); | |
961 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
962 | outb_p(vga_state.HorizDisplayEnd, vga_video_port_val); | |
963 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
964 | outb_p(vga_state.StartHorizRetrace, vga_video_port_val); | |
965 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
966 | outb_p(vga_state.EndHorizRetrace, vga_video_port_val); | |
967 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
968 | outb_p(vga_state.Overflow, vga_video_port_val); | |
969 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
970 | outb_p(vga_state.StartVertRetrace, vga_video_port_val); | |
971 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
972 | outb_p(vga_state.EndVertRetrace, vga_video_port_val); | |
973 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
974 | outb_p(vga_state.ModeControl, vga_video_port_val); | |
975 | /* ClockingMode */ | |
976 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode); | |
977 | ||
978 | /* restore index/control registers */ | |
979 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
980 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
6b2c1800 | 981 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
982 | } |
983 | ||
984 | static void vga_pal_blank(struct vgastate *state) | |
985 | { | |
986 | int i; | |
987 | ||
1a66ddcb | 988 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 LT |
989 | for (i = 0; i < 16; i++) { |
990 | vga_w(state->vgabase, VGA_PEL_IW, i); | |
991 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
992 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
993 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
994 | } | |
995 | } | |
996 | ||
997 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch) | |
998 | { | |
999 | switch (blank) { | |
1000 | case 0: /* Unblank */ | |
1001 | if (vga_vesa_blanked) { | |
89f0244e | 1002 | vga_vesa_unblank(&vgastate); |
1da177e4 LT |
1003 | vga_vesa_blanked = 0; |
1004 | } | |
1005 | if (vga_palette_blanked) { | |
1006 | vga_set_palette(c, color_table); | |
96fd9554 | 1007 | vga_palette_blanked = false; |
1da177e4 LT |
1008 | return 0; |
1009 | } | |
96fd9554 | 1010 | vga_is_gfx = false; |
1da177e4 LT |
1011 | /* Tell console.c that it has to restore the screen itself */ |
1012 | return 1; | |
1013 | case 1: /* Normal blanking */ | |
1014 | case -1: /* Obsolete */ | |
1015 | if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { | |
89f0244e | 1016 | vga_pal_blank(&vgastate); |
96fd9554 | 1017 | vga_palette_blanked = true; |
1da177e4 LT |
1018 | return 0; |
1019 | } | |
1020 | vgacon_set_origin(c); | |
1021 | scr_memsetw((void *) vga_vram_base, BLANK, | |
1022 | c->vc_screenbuf_size); | |
1023 | if (mode_switch) | |
96fd9554 | 1024 | vga_is_gfx = true; |
1da177e4 LT |
1025 | return 1; |
1026 | default: /* VESA blanking */ | |
1027 | if (vga_video_type == VIDEO_TYPE_VGAC) { | |
89f0244e | 1028 | vga_vesa_blank(&vgastate, blank - 1); |
1da177e4 LT |
1029 | vga_vesa_blanked = blank; |
1030 | } | |
1031 | return 0; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * PIO_FONT support. | |
1037 | * | |
1038 | * The font loading code goes back to the codepage package by | |
1039 | * Joel Hoffman (joel@wam.umd.edu). (He reports that the original | |
1040 | * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 | |
1041 | * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) | |
1042 | * | |
1043 | * Change for certain monochrome monitors by Yury Shevchuck | |
1044 | * (sizif@botik.yaroslavl.su). | |
1045 | */ | |
1046 | ||
1da177e4 LT |
1047 | #define colourmap 0xa0000 |
1048 | /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we | |
1049 | should use 0xA0000 for the bwmap as well.. */ | |
1050 | #define blackwmap 0xa0000 | |
1051 | #define cmapsz 8192 | |
1052 | ||
96fd9554 JS |
1053 | static int vgacon_do_font_op(struct vgastate *state, char *arg, int set, |
1054 | bool ch512) | |
1da177e4 LT |
1055 | { |
1056 | unsigned short video_port_status = vga_video_port_reg + 6; | |
1057 | int font_select = 0x00, beg, i; | |
1058 | char *charmap; | |
2a248307 | 1059 | bool clear_attribs = false; |
1da177e4 | 1060 | if (vga_video_type != VIDEO_TYPE_EGAM) { |
4f1bcaf0 | 1061 | charmap = (char *) VGA_MAP_MEM(colourmap, 0); |
1da177e4 | 1062 | beg = 0x0e; |
1da177e4 | 1063 | } else { |
4f1bcaf0 | 1064 | charmap = (char *) VGA_MAP_MEM(blackwmap, 0); |
1da177e4 LT |
1065 | beg = 0x0a; |
1066 | } | |
1067 | ||
1068 | #ifdef BROKEN_GRAPHICS_PROGRAMS | |
1069 | /* | |
1070 | * All fonts are loaded in slot 0 (0:1 for 512 ch) | |
1071 | */ | |
1072 | ||
1073 | if (!arg) | |
1074 | return -EINVAL; /* Return to default font not supported */ | |
1075 | ||
96fd9554 | 1076 | vga_font_is_default = false; |
1da177e4 LT |
1077 | font_select = ch512 ? 0x04 : 0x00; |
1078 | #else | |
1079 | /* | |
1080 | * The default font is kept in slot 0 and is never touched. | |
1081 | * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch) | |
1082 | */ | |
1083 | ||
1084 | if (set) { | |
1085 | vga_font_is_default = !arg; | |
1086 | if (!arg) | |
96fd9554 | 1087 | ch512 = false; /* Default font is always 256 */ |
1da177e4 LT |
1088 | font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00; |
1089 | } | |
1090 | ||
1091 | if (!vga_font_is_default) | |
1092 | charmap += 4 * cmapsz; | |
1093 | #endif | |
1094 | ||
6b2c1800 | 1095 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1096 | /* First, the Sequencer */ |
1097 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
1098 | /* CPU writes only to map 2 */ | |
1099 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04); | |
1100 | /* Sequential addressing */ | |
1101 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07); | |
1102 | /* Clear synchronous reset */ | |
1103 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1104 | ||
1105 | /* Now, the graphics controller, select map 2 */ | |
1106 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02); | |
1107 | /* disable odd-even addressing */ | |
1108 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00); | |
1109 | /* map start at A000:0000 */ | |
1110 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00); | |
6b2c1800 | 1111 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
1112 | |
1113 | if (arg) { | |
1114 | if (set) | |
7e6d72c1 | 1115 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1116 | vga_writeb(arg[i], charmap + i); |
7e6d72c1 MT |
1117 | cond_resched(); |
1118 | } | |
1da177e4 | 1119 | else |
7e6d72c1 | 1120 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1121 | arg[i] = vga_readb(charmap + i); |
7e6d72c1 MT |
1122 | cond_resched(); |
1123 | } | |
1da177e4 LT |
1124 | |
1125 | /* | |
1126 | * In 512-character mode, the character map is not contiguous if | |
1127 | * we want to remain EGA compatible -- which we do | |
1128 | */ | |
1129 | ||
1130 | if (ch512) { | |
1131 | charmap += 2 * cmapsz; | |
1132 | arg += cmapsz; | |
1133 | if (set) | |
7e6d72c1 | 1134 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1135 | vga_writeb(arg[i], charmap + i); |
7e6d72c1 MT |
1136 | cond_resched(); |
1137 | } | |
1da177e4 | 1138 | else |
7e6d72c1 | 1139 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1140 | arg[i] = vga_readb(charmap + i); |
7e6d72c1 MT |
1141 | cond_resched(); |
1142 | } | |
1da177e4 LT |
1143 | } |
1144 | } | |
1145 | ||
6b2c1800 | 1146 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1147 | /* First, the sequencer, Synchronous reset */ |
1148 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); | |
1149 | /* CPU writes to maps 0 and 1 */ | |
1150 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03); | |
1151 | /* odd-even addressing */ | |
1152 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03); | |
1153 | /* Character Map Select */ | |
1154 | if (set) | |
1155 | vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select); | |
1156 | /* clear synchronous reset */ | |
1157 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1158 | ||
1159 | /* Now, the graphics controller, select map 0 for CPU */ | |
1160 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00); | |
1161 | /* enable even-odd addressing */ | |
1162 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10); | |
1163 | /* map starts at b800:0 or b000:0 */ | |
1164 | vga_wgfx(state->vgabase, VGA_GFX_MISC, beg); | |
1165 | ||
1166 | /* if 512 char mode is already enabled don't re-enable it. */ | |
1167 | if ((set) && (ch512 != vga_512_chars)) { | |
1da177e4 LT |
1168 | vga_512_chars = ch512; |
1169 | /* 256-char: enable intensity bit | |
1170 | 512-char: disable intensity bit */ | |
1171 | inb_p(video_port_status); /* clear address flip-flop */ | |
1172 | /* color plane enable register */ | |
1173 | vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f); | |
1174 | /* Wilton (1987) mentions the following; I don't know what | |
1175 | it means, but it works, and it appears necessary */ | |
1176 | inb_p(video_port_status); | |
1177 | vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); | |
2a248307 | 1178 | clear_attribs = true; |
1da177e4 | 1179 | } |
6b2c1800 | 1180 | raw_spin_unlock_irq(&vga_lock); |
2a248307 DA |
1181 | |
1182 | if (clear_attribs) { | |
1183 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1184 | struct vc_data *c = vc_cons[i].d; | |
1185 | if (c && c->vc_sw == &vga_con) { | |
1186 | /* force hi font mask to 0, so we always clear | |
1187 | the bit on either transition */ | |
1188 | c->vc_hi_font_mask = 0x00; | |
1189 | clear_buffer_attributes(c); | |
1190 | c->vc_hi_font_mask = ch512 ? 0x0800 : 0; | |
1191 | } | |
1192 | } | |
1193 | } | |
1da177e4 LT |
1194 | return 0; |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * Adjust the screen to fit a font of a certain height | |
1199 | */ | |
1200 | static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) | |
1201 | { | |
1202 | unsigned char ovr, vde, fsr; | |
1203 | int rows, maxscan, i; | |
1204 | ||
1205 | rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ | |
1206 | maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ | |
1207 | ||
1208 | /* Reprogram the CRTC for the new font size | |
1209 | Note: the attempt to read the overflow register will fail | |
1210 | on an EGA, but using 0xff for the previous value appears to | |
1211 | be OK for EGA text modes in the range 257-512 scan lines, so I | |
1212 | guess we don't need to worry about it. | |
1213 | ||
1214 | The same applies for the spill bits in the font size and cursor | |
1215 | registers; they are write-only on EGA, but it appears that they | |
1216 | are all don't care bits on EGA, so I guess it doesn't matter. */ | |
1217 | ||
6b2c1800 | 1218 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1219 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
1220 | ovr = inb_p(vga_video_port_val); | |
1221 | outb_p(0x09, vga_video_port_reg); /* Font size register */ | |
1222 | fsr = inb_p(vga_video_port_val); | |
6b2c1800 | 1223 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
1224 | |
1225 | vde = maxscan & 0xff; /* Vertical display end reg */ | |
1226 | ovr = (ovr & 0xbd) + /* Overflow register */ | |
1227 | ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); | |
1228 | fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ | |
1229 | ||
6b2c1800 | 1230 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1231 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
1232 | outb_p(ovr, vga_video_port_val); | |
1233 | outb_p(0x09, vga_video_port_reg); /* Font size */ | |
1234 | outb_p(fsr, vga_video_port_val); | |
1235 | outb_p(0x12, vga_video_port_reg); /* Vertical display limit */ | |
1236 | outb_p(vde, vga_video_port_val); | |
6b2c1800 | 1237 | raw_spin_unlock_irq(&vga_lock); |
5ef897c7 | 1238 | vga_video_font_height = fontheight; |
1da177e4 LT |
1239 | |
1240 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1241 | struct vc_data *c = vc_cons[i].d; | |
1242 | ||
1243 | if (c && c->vc_sw == &vga_con) { | |
6ca8dfd7 | 1244 | if (con_is_visible(c)) { |
1da177e4 LT |
1245 | /* void size to cause regs to be rewritten */ |
1246 | cursor_size_lastfrom = 0; | |
1247 | cursor_size_lastto = 0; | |
1248 | c->vc_sw->con_cursor(c, CM_DRAW); | |
1249 | } | |
1250 | c->vc_font.height = fontheight; | |
1251 | vc_resize(c, 0, rows); /* Adjust console size */ | |
1252 | } | |
1253 | } | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags) | |
1258 | { | |
1259 | unsigned charcount = font->charcount; | |
1260 | int rc; | |
1261 | ||
1262 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1263 | return -EINVAL; | |
1264 | ||
53dbb26d AD |
1265 | if (font->width != VGA_FONTWIDTH || |
1266 | (charcount != 256 && charcount != 512)) | |
1da177e4 LT |
1267 | return -EINVAL; |
1268 | ||
89f0244e | 1269 | rc = vgacon_do_font_op(&vgastate, font->data, 1, charcount == 512); |
1da177e4 LT |
1270 | if (rc) |
1271 | return rc; | |
1272 | ||
1273 | if (!(flags & KD_FONT_FLAG_DONT_RECALC)) | |
1274 | rc = vgacon_adjust_height(c, font->height); | |
1275 | return rc; | |
1276 | } | |
1277 | ||
1278 | static int vgacon_font_get(struct vc_data *c, struct console_font *font) | |
1279 | { | |
1280 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1281 | return -EINVAL; | |
1282 | ||
53dbb26d | 1283 | font->width = VGA_FONTWIDTH; |
1da177e4 LT |
1284 | font->height = c->vc_font.height; |
1285 | font->charcount = vga_512_chars ? 512 : 256; | |
1286 | if (!font->data) | |
1287 | return 0; | |
89f0244e | 1288 | return vgacon_do_font_op(&vgastate, font->data, 0, vga_512_chars); |
1da177e4 LT |
1289 | } |
1290 | ||
28254d43 | 1291 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
e400b6ec | 1292 | unsigned int height, unsigned int user) |
28254d43 | 1293 | { |
3ea33510 PA |
1294 | if (width % 2 || width > screen_info.orig_video_cols || |
1295 | height > (screen_info.orig_video_lines * vga_default_font_height)/ | |
6d36ba62 | 1296 | c->vc_font.height) |
e400b6ec AD |
1297 | /* let svgatextmode tinker with video timings and |
1298 | return success */ | |
1299 | return (user) ? 0 : -EINVAL; | |
28254d43 | 1300 | |
6ca8dfd7 | 1301 | if (con_is_visible(c) && !vga_is_gfx) /* who knows */ |
28254d43 ST |
1302 | vgacon_doresize(c, width, height); |
1303 | return 0; | |
1304 | } | |
1305 | ||
1da177e4 LT |
1306 | static int vgacon_set_origin(struct vc_data *c) |
1307 | { | |
1308 | if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ | |
1309 | (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ | |
1310 | return 0; | |
1311 | c->vc_origin = c->vc_visible_origin = vga_vram_base; | |
1312 | vga_set_mem_top(c); | |
1313 | vga_rolled_over = 0; | |
1314 | return 1; | |
1315 | } | |
1316 | ||
1317 | static void vgacon_save_screen(struct vc_data *c) | |
1318 | { | |
1319 | static int vga_bootup_console = 0; | |
1320 | ||
1321 | if (!vga_bootup_console) { | |
1322 | /* This is a gross hack, but here is the only place we can | |
1323 | * set bootup console parameters without messing up generic | |
1324 | * console initialization routines. | |
1325 | */ | |
1326 | vga_bootup_console = 1; | |
3ea33510 PA |
1327 | c->vc_x = screen_info.orig_x; |
1328 | c->vc_y = screen_info.orig_y; | |
1da177e4 | 1329 | } |
f18cd8f7 | 1330 | |
025dfdaf | 1331 | /* We can't copy in more than the size of the video buffer, |
f18cd8f7 JS |
1332 | * or we'll be copying in VGA BIOS */ |
1333 | ||
1da177e4 LT |
1334 | if (!vga_is_gfx) |
1335 | scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, | |
f18cd8f7 | 1336 | c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); |
1da177e4 LT |
1337 | } |
1338 | ||
d705ff38 JS |
1339 | static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b, |
1340 | enum con_scroll dir, unsigned int lines) | |
1da177e4 LT |
1341 | { |
1342 | unsigned long oldo; | |
1343 | unsigned int delta; | |
1344 | ||
2ae85477 | 1345 | if (t || b != c->vc_rows || vga_is_gfx || c->vc_mode != KD_TEXT) |
d705ff38 | 1346 | return false; |
1da177e4 | 1347 | |
1da177e4 | 1348 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
d705ff38 | 1349 | return false; |
1da177e4 | 1350 | |
15bdab95 | 1351 | vgacon_restore_screen(c); |
1da177e4 LT |
1352 | oldo = c->vc_origin; |
1353 | delta = lines * c->vc_size_row; | |
1354 | if (dir == SM_UP) { | |
15bdab95 | 1355 | vgacon_scrollback_update(c, t, lines); |
1da177e4 LT |
1356 | if (c->vc_scr_end + delta >= vga_vram_end) { |
1357 | scr_memcpyw((u16 *) vga_vram_base, | |
1358 | (u16 *) (oldo + delta), | |
1359 | c->vc_screenbuf_size - delta); | |
1360 | c->vc_origin = vga_vram_base; | |
1361 | vga_rolled_over = oldo - vga_vram_base; | |
1362 | } else | |
1363 | c->vc_origin += delta; | |
1364 | scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - | |
93f78da4 | 1365 | delta), c->vc_video_erase_char, |
1da177e4 LT |
1366 | delta); |
1367 | } else { | |
1368 | if (oldo - delta < vga_vram_base) { | |
1369 | scr_memmovew((u16 *) (vga_vram_end - | |
1370 | c->vc_screenbuf_size + | |
1371 | delta), (u16 *) oldo, | |
1372 | c->vc_screenbuf_size - delta); | |
1373 | c->vc_origin = vga_vram_end - c->vc_screenbuf_size; | |
1374 | vga_rolled_over = 0; | |
1375 | } else | |
1376 | c->vc_origin -= delta; | |
1377 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
93f78da4 | 1378 | scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, |
1da177e4 LT |
1379 | delta); |
1380 | } | |
1381 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
1382 | c->vc_visible_origin = c->vc_origin; | |
1383 | vga_set_mem_top(c); | |
1384 | c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; | |
d705ff38 | 1385 | return true; |
1da177e4 LT |
1386 | } |
1387 | ||
1da177e4 LT |
1388 | /* |
1389 | * The console `switch' structure for the VGA based console | |
1390 | */ | |
1391 | ||
1392 | static int vgacon_dummy(struct vc_data *c) | |
1393 | { | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | #define DUMMY (void *) vgacon_dummy | |
1398 | ||
1399 | const struct consw vga_con = { | |
1400 | .owner = THIS_MODULE, | |
1401 | .con_startup = vgacon_startup, | |
1402 | .con_init = vgacon_init, | |
1403 | .con_deinit = vgacon_deinit, | |
1404 | .con_clear = DUMMY, | |
1405 | .con_putc = DUMMY, | |
1406 | .con_putcs = DUMMY, | |
1407 | .con_cursor = vgacon_cursor, | |
1408 | .con_scroll = vgacon_scroll, | |
1da177e4 LT |
1409 | .con_switch = vgacon_switch, |
1410 | .con_blank = vgacon_blank, | |
1411 | .con_font_set = vgacon_font_set, | |
1412 | .con_font_get = vgacon_font_get, | |
28254d43 | 1413 | .con_resize = vgacon_resize, |
1da177e4 LT |
1414 | .con_set_palette = vgacon_set_palette, |
1415 | .con_scrolldelta = vgacon_scrolldelta, | |
1416 | .con_set_origin = vgacon_set_origin, | |
1417 | .con_save_screen = vgacon_save_screen, | |
1418 | .con_build_attr = vgacon_build_attr, | |
1419 | .con_invert_region = vgacon_invert_region, | |
bcd375f7 | 1420 | .con_flush_scrollback = vgacon_flush_scrollback, |
1da177e4 | 1421 | }; |
a4de0526 | 1422 | EXPORT_SYMBOL(vga_con); |
1da177e4 LT |
1423 | |
1424 | MODULE_LICENSE("GPL"); |