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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 AD |
164 | /* software scrollback */ |
165 | static void *vgacon_scrollback; | |
166 | static int vgacon_scrollback_tail; | |
167 | static int vgacon_scrollback_size; | |
168 | static int vgacon_scrollback_rows; | |
169 | static int vgacon_scrollback_cnt; | |
170 | static int vgacon_scrollback_cur; | |
171 | static int vgacon_scrollback_save; | |
172 | static int vgacon_scrollback_restore; | |
173 | ||
174 | static void vgacon_scrollback_init(int pitch) | |
175 | { | |
176 | int rows = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024/pitch; | |
177 | ||
178 | if (vgacon_scrollback) { | |
179 | vgacon_scrollback_cnt = 0; | |
180 | vgacon_scrollback_tail = 0; | |
181 | vgacon_scrollback_cur = 0; | |
182 | vgacon_scrollback_rows = rows - 1; | |
183 | vgacon_scrollback_size = rows * pitch; | |
184 | } | |
185 | } | |
186 | ||
63b1dd07 | 187 | static void vgacon_scrollback_startup(void) |
15bdab95 | 188 | { |
b8ec7573 | 189 | vgacon_scrollback = kcalloc(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024, GFP_NOWAIT); |
15bdab95 AD |
190 | vgacon_scrollback_init(vga_video_num_columns * 2); |
191 | } | |
192 | ||
193 | static void vgacon_scrollback_update(struct vc_data *c, int t, int count) | |
194 | { | |
195 | void *p; | |
196 | ||
197 | if (!vgacon_scrollback_size || c->vc_num != fg_console) | |
198 | return; | |
199 | ||
200 | p = (void *) (c->vc_origin + t * c->vc_size_row); | |
201 | ||
202 | while (count--) { | |
203 | scr_memcpyw(vgacon_scrollback + vgacon_scrollback_tail, | |
204 | p, c->vc_size_row); | |
205 | vgacon_scrollback_cnt++; | |
206 | p += c->vc_size_row; | |
207 | vgacon_scrollback_tail += c->vc_size_row; | |
208 | ||
209 | if (vgacon_scrollback_tail >= vgacon_scrollback_size) | |
210 | vgacon_scrollback_tail = 0; | |
211 | ||
212 | if (vgacon_scrollback_cnt > vgacon_scrollback_rows) | |
213 | vgacon_scrollback_cnt = vgacon_scrollback_rows; | |
214 | ||
215 | vgacon_scrollback_cur = vgacon_scrollback_cnt; | |
216 | } | |
217 | } | |
218 | ||
219 | static void vgacon_restore_screen(struct vc_data *c) | |
220 | { | |
221 | vgacon_scrollback_save = 0; | |
222 | ||
223 | if (!vga_is_gfx && !vgacon_scrollback_restore) { | |
224 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, | |
225 | c->vc_screenbuf_size > vga_vram_size ? | |
226 | vga_vram_size : c->vc_screenbuf_size); | |
227 | vgacon_scrollback_restore = 1; | |
228 | vgacon_scrollback_cur = vgacon_scrollback_cnt; | |
229 | } | |
230 | } | |
231 | ||
97293de9 | 232 | static void vgacon_scrolldelta(struct vc_data *c, int lines) |
15bdab95 | 233 | { |
5ab48409 | 234 | int start, end, count, soff; |
15bdab95 AD |
235 | |
236 | if (!lines) { | |
237 | c->vc_visible_origin = c->vc_origin; | |
238 | vga_set_mem_top(c); | |
97293de9 | 239 | return; |
15bdab95 AD |
240 | } |
241 | ||
242 | if (!vgacon_scrollback) | |
97293de9 | 243 | return; |
15bdab95 AD |
244 | |
245 | if (!vgacon_scrollback_save) { | |
246 | vgacon_cursor(c, CM_ERASE); | |
247 | vgacon_save_screen(c); | |
248 | vgacon_scrollback_save = 1; | |
249 | } | |
250 | ||
251 | vgacon_scrollback_restore = 0; | |
252 | start = vgacon_scrollback_cur + lines; | |
253 | end = start + abs(lines); | |
254 | ||
255 | if (start < 0) | |
256 | start = 0; | |
257 | ||
258 | if (start > vgacon_scrollback_cnt) | |
259 | start = vgacon_scrollback_cnt; | |
260 | ||
261 | if (end < 0) | |
262 | end = 0; | |
263 | ||
264 | if (end > vgacon_scrollback_cnt) | |
265 | end = vgacon_scrollback_cnt; | |
266 | ||
267 | vgacon_scrollback_cur = start; | |
268 | count = end - start; | |
269 | soff = vgacon_scrollback_tail - ((vgacon_scrollback_cnt - end) * | |
270 | c->vc_size_row); | |
271 | soff -= count * c->vc_size_row; | |
272 | ||
273 | if (soff < 0) | |
274 | soff += vgacon_scrollback_size; | |
275 | ||
276 | count = vgacon_scrollback_cnt - start; | |
277 | ||
278 | if (count > c->vc_rows) | |
279 | count = c->vc_rows; | |
280 | ||
c38182a7 MS |
281 | if (count) { |
282 | int copysize; | |
5ab48409 MS |
283 | |
284 | int diff = c->vc_rows - count; | |
285 | void *d = (void *) c->vc_origin; | |
286 | void *s = (void *) c->vc_screenbuf; | |
287 | ||
c38182a7 MS |
288 | count *= c->vc_size_row; |
289 | /* how much memory to end of buffer left? */ | |
290 | copysize = min(count, vgacon_scrollback_size - soff); | |
291 | scr_memcpyw(d, vgacon_scrollback + soff, copysize); | |
292 | d += copysize; | |
293 | count -= copysize; | |
294 | ||
295 | if (count) { | |
296 | scr_memcpyw(d, vgacon_scrollback, count); | |
297 | d += count; | |
298 | } | |
15bdab95 | 299 | |
c38182a7 MS |
300 | if (diff) |
301 | scr_memcpyw(d, s, diff * c->vc_size_row); | |
5ab48409 MS |
302 | } else |
303 | vgacon_cursor(c, CM_MOVE); | |
15bdab95 AD |
304 | } |
305 | #else | |
306 | #define vgacon_scrollback_startup(...) do { } while (0) | |
307 | #define vgacon_scrollback_init(...) do { } while (0) | |
308 | #define vgacon_scrollback_update(...) do { } while (0) | |
309 | ||
310 | static void vgacon_restore_screen(struct vc_data *c) | |
311 | { | |
312 | if (c->vc_origin != c->vc_visible_origin) | |
313 | vgacon_scrolldelta(c, 0); | |
314 | } | |
315 | ||
97293de9 | 316 | static void vgacon_scrolldelta(struct vc_data *c, int lines) |
15bdab95 | 317 | { |
35cc56f9 JS |
318 | vc_scrolldelta_helper(c, lines, vga_rolled_over, (void *)vga_vram_base, |
319 | vga_vram_size); | |
15bdab95 | 320 | vga_set_mem_top(c); |
15bdab95 AD |
321 | } |
322 | #endif /* CONFIG_VGACON_SOFT_SCROLLBACK */ | |
323 | ||
50ec42ed | 324 | static const char *vgacon_startup(void) |
1da177e4 LT |
325 | { |
326 | const char *display_desc = NULL; | |
327 | u16 saved1, saved2; | |
328 | volatile u16 *p; | |
329 | ||
554ec37a YH |
330 | if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB || |
331 | screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { | |
1da177e4 LT |
332 | no_vga: |
333 | #ifdef CONFIG_DUMMY_CONSOLE | |
334 | conswitchp = &dummy_con; | |
335 | return conswitchp->con_startup(); | |
336 | #else | |
337 | return NULL; | |
338 | #endif | |
339 | } | |
340 | ||
30c82645 | 341 | /* boot_params.screen_info initialized? */ |
3ea33510 PA |
342 | if ((screen_info.orig_video_mode == 0) && |
343 | (screen_info.orig_video_lines == 0) && | |
344 | (screen_info.orig_video_cols == 0)) | |
a1a4849c GH |
345 | goto no_vga; |
346 | ||
1da177e4 | 347 | /* VGA16 modes are not handled by VGACON */ |
3ea33510 PA |
348 | if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ |
349 | (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ | |
350 | (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ | |
351 | (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ | |
352 | (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ | |
1da177e4 LT |
353 | goto no_vga; |
354 | ||
3ea33510 PA |
355 | vga_video_num_lines = screen_info.orig_video_lines; |
356 | vga_video_num_columns = screen_info.orig_video_cols; | |
89f0244e | 357 | vgastate.vgabase = NULL; |
1da177e4 | 358 | |
3ea33510 PA |
359 | if (screen_info.orig_video_mode == 7) { |
360 | /* Monochrome display */ | |
1da177e4 LT |
361 | vga_vram_base = 0xb0000; |
362 | vga_video_port_reg = VGA_CRT_IM; | |
363 | vga_video_port_val = VGA_CRT_DM; | |
3ea33510 | 364 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
1da177e4 | 365 | static struct resource ega_console_resource = |
740e518e | 366 | { .name = "ega", .start = 0x3B0, .end = 0x3BF }; |
1da177e4 | 367 | vga_video_type = VIDEO_TYPE_EGAM; |
4f1bcaf0 | 368 | vga_vram_size = 0x8000; |
1da177e4 LT |
369 | display_desc = "EGA+"; |
370 | request_resource(&ioport_resource, | |
371 | &ega_console_resource); | |
372 | } else { | |
373 | static struct resource mda1_console_resource = | |
740e518e | 374 | { .name = "mda", .start = 0x3B0, .end = 0x3BB }; |
1da177e4 | 375 | static struct resource mda2_console_resource = |
740e518e | 376 | { .name = "mda", .start = 0x3BF, .end = 0x3BF }; |
1da177e4 | 377 | vga_video_type = VIDEO_TYPE_MDA; |
4f1bcaf0 | 378 | vga_vram_size = 0x2000; |
1da177e4 LT |
379 | display_desc = "*MDA"; |
380 | request_resource(&ioport_resource, | |
381 | &mda1_console_resource); | |
382 | request_resource(&ioport_resource, | |
383 | &mda2_console_resource); | |
384 | vga_video_font_height = 14; | |
385 | } | |
386 | } else { | |
387 | /* If not, it is color. */ | |
96fd9554 | 388 | vga_can_do_color = true; |
1da177e4 LT |
389 | vga_vram_base = 0xb8000; |
390 | vga_video_port_reg = VGA_CRT_IC; | |
391 | vga_video_port_val = VGA_CRT_DC; | |
3ea33510 | 392 | if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { |
1da177e4 LT |
393 | int i; |
394 | ||
4f1bcaf0 | 395 | vga_vram_size = 0x8000; |
1da177e4 | 396 | |
3ea33510 | 397 | if (!screen_info.orig_video_isVGA) { |
1da177e4 | 398 | static struct resource ega_console_resource |
740e518e | 399 | = { .name = "ega", .start = 0x3C0, .end = 0x3DF }; |
1da177e4 LT |
400 | vga_video_type = VIDEO_TYPE_EGAC; |
401 | display_desc = "EGA"; | |
402 | request_resource(&ioport_resource, | |
403 | &ega_console_resource); | |
404 | } else { | |
405 | static struct resource vga_console_resource | |
740e518e | 406 | = { .name = "vga+", .start = 0x3C0, .end = 0x3DF }; |
1da177e4 LT |
407 | vga_video_type = VIDEO_TYPE_VGAC; |
408 | display_desc = "VGA+"; | |
409 | request_resource(&ioport_resource, | |
410 | &vga_console_resource); | |
411 | ||
1da177e4 LT |
412 | /* |
413 | * Normalise the palette registers, to point | |
414 | * the 16 screen colours to the first 16 | |
415 | * DAC entries. | |
416 | */ | |
417 | ||
418 | for (i = 0; i < 16; i++) { | |
419 | inb_p(VGA_IS1_RC); | |
420 | outb_p(i, VGA_ATT_W); | |
421 | outb_p(i, VGA_ATT_W); | |
422 | } | |
423 | outb_p(0x20, VGA_ATT_W); | |
424 | ||
425 | /* | |
426 | * Now set the DAC registers back to their | |
427 | * default values | |
428 | */ | |
429 | for (i = 0; i < 16; i++) { | |
430 | outb_p(color_table[i], VGA_PEL_IW); | |
431 | outb_p(default_red[i], VGA_PEL_D); | |
432 | outb_p(default_grn[i], VGA_PEL_D); | |
433 | outb_p(default_blu[i], VGA_PEL_D); | |
434 | } | |
435 | } | |
436 | } else { | |
437 | static struct resource cga_console_resource = | |
740e518e | 438 | { .name = "cga", .start = 0x3D4, .end = 0x3D5 }; |
1da177e4 | 439 | vga_video_type = VIDEO_TYPE_CGA; |
4f1bcaf0 | 440 | vga_vram_size = 0x2000; |
1da177e4 LT |
441 | display_desc = "*CGA"; |
442 | request_resource(&ioport_resource, | |
443 | &cga_console_resource); | |
444 | vga_video_font_height = 8; | |
445 | } | |
446 | } | |
447 | ||
4f1bcaf0 BH |
448 | vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); |
449 | vga_vram_end = vga_vram_base + vga_vram_size; | |
1da177e4 LT |
450 | |
451 | /* | |
452 | * Find out if there is a graphics card present. | |
453 | * Are there smarter methods around? | |
454 | */ | |
455 | p = (volatile u16 *) vga_vram_base; | |
456 | saved1 = scr_readw(p); | |
457 | saved2 = scr_readw(p + 1); | |
458 | scr_writew(0xAA55, p); | |
459 | scr_writew(0x55AA, p + 1); | |
460 | if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { | |
461 | scr_writew(saved1, p); | |
462 | scr_writew(saved2, p + 1); | |
463 | goto no_vga; | |
464 | } | |
465 | scr_writew(0x55AA, p); | |
466 | scr_writew(0xAA55, p + 1); | |
467 | if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { | |
468 | scr_writew(saved1, p); | |
469 | scr_writew(saved2, p + 1); | |
470 | goto no_vga; | |
471 | } | |
472 | scr_writew(saved1, p); | |
473 | scr_writew(saved2, p + 1); | |
474 | ||
475 | if (vga_video_type == VIDEO_TYPE_EGAC | |
476 | || vga_video_type == VIDEO_TYPE_VGAC | |
477 | || vga_video_type == VIDEO_TYPE_EGAM) { | |
478 | vga_hardscroll_enabled = vga_hardscroll_user_enable; | |
3ea33510 PA |
479 | vga_default_font_height = screen_info.orig_video_points; |
480 | vga_video_font_height = screen_info.orig_video_points; | |
1da177e4 LT |
481 | /* This may be suboptimal but is a safe bet - go with it */ |
482 | vga_scan_lines = | |
483 | vga_video_font_height * vga_video_num_lines; | |
484 | } | |
53dbb26d | 485 | |
3ea33510 | 486 | vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; |
53dbb26d | 487 | vgacon_yres = vga_scan_lines; |
50ec42ed AD |
488 | |
489 | if (!vga_init_done) { | |
490 | vgacon_scrollback_startup(); | |
96fd9554 | 491 | vga_init_done = true; |
50ec42ed AD |
492 | } |
493 | ||
1da177e4 LT |
494 | return display_desc; |
495 | } | |
496 | ||
497 | static void vgacon_init(struct vc_data *c, int init) | |
498 | { | |
e4bdab70 | 499 | struct uni_pagedir *p; |
1da177e4 | 500 | |
50ec42ed AD |
501 | /* |
502 | * We cannot be loaded as a module, therefore init is always 1, | |
503 | * but vgacon_init can be called more than once, and init will | |
504 | * not be 1. | |
505 | */ | |
1da177e4 | 506 | c->vc_can_do_color = vga_can_do_color; |
50ec42ed AD |
507 | |
508 | /* set dimensions manually if init != 0 since vc_resize() will fail */ | |
509 | if (init) { | |
510 | c->vc_cols = vga_video_num_columns; | |
511 | c->vc_rows = vga_video_num_lines; | |
512 | } else | |
513 | vc_resize(c, vga_video_num_columns, vga_video_num_lines); | |
514 | ||
1da177e4 LT |
515 | c->vc_scan_lines = vga_scan_lines; |
516 | c->vc_font.height = vga_video_font_height; | |
517 | c->vc_complement_mask = 0x7700; | |
a40920b4 BN |
518 | if (vga_512_chars) |
519 | c->vc_hi_font_mask = 0x0800; | |
1da177e4 | 520 | p = *c->vc_uni_pagedir_loc; |
0f2893f0 | 521 | if (c->vc_uni_pagedir_loc != &vgacon_uni_pagedir) { |
1da177e4 | 522 | con_free_unimap(c); |
0f2893f0 TI |
523 | c->vc_uni_pagedir_loc = &vgacon_uni_pagedir; |
524 | vgacon_refcount++; | |
525 | } | |
526 | if (!vgacon_uni_pagedir && p) | |
1da177e4 | 527 | con_set_default_unimap(c); |
f6c06b68 | 528 | |
b434a680 MG |
529 | /* Only set the default if the user didn't deliberately override it */ |
530 | if (global_cursor_default == -1) | |
531 | global_cursor_default = | |
532 | !(screen_info.flags & VIDEO_FLAGS_NOCURSOR); | |
1da177e4 LT |
533 | } |
534 | ||
1da177e4 LT |
535 | static void vgacon_deinit(struct vc_data *c) |
536 | { | |
f0c7d2b7 | 537 | /* When closing the active console, reset video origin */ |
6ca8dfd7 | 538 | if (con_is_visible(c)) { |
1da177e4 LT |
539 | c->vc_visible_origin = vga_vram_base; |
540 | vga_set_mem_top(c); | |
1da177e4 | 541 | } |
f0c7d2b7 | 542 | |
0f2893f0 | 543 | if (!--vgacon_refcount) |
f0c7d2b7 | 544 | con_free_unimap(c); |
1da177e4 LT |
545 | c->vc_uni_pagedir_loc = &c->vc_uni_pagedir; |
546 | con_set_default_unimap(c); | |
547 | } | |
548 | ||
549 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity, | |
fa6ce9ab | 550 | u8 blink, u8 underline, u8 reverse, u8 italic) |
1da177e4 LT |
551 | { |
552 | u8 attr = color; | |
553 | ||
554 | if (vga_can_do_color) { | |
fa6ce9ab JE |
555 | if (italic) |
556 | attr = (attr & 0xF0) | c->vc_itcolor; | |
557 | else if (underline) | |
1da177e4 LT |
558 | attr = (attr & 0xf0) | c->vc_ulcolor; |
559 | else if (intensity == 0) | |
560 | attr = (attr & 0xf0) | c->vc_halfcolor; | |
561 | } | |
562 | if (reverse) | |
563 | attr = | |
564 | ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & | |
565 | 0x77); | |
566 | if (blink) | |
567 | attr ^= 0x80; | |
568 | if (intensity == 2) | |
569 | attr ^= 0x08; | |
570 | if (!vga_can_do_color) { | |
fa6ce9ab JE |
571 | if (italic) |
572 | attr = (attr & 0xF8) | 0x02; | |
573 | else if (underline) | |
1da177e4 LT |
574 | attr = (attr & 0xf8) | 0x01; |
575 | else if (intensity == 0) | |
576 | attr = (attr & 0xf0) | 0x08; | |
577 | } | |
578 | return attr; | |
579 | } | |
580 | ||
581 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) | |
582 | { | |
96fd9554 | 583 | const bool col = vga_can_do_color; |
1da177e4 LT |
584 | |
585 | while (count--) { | |
586 | u16 a = scr_readw(p); | |
587 | if (col) | |
588 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | | |
589 | (((a) & 0x0700) << 4); | |
590 | else | |
591 | a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; | |
592 | scr_writew(a, p++); | |
593 | } | |
594 | } | |
595 | ||
596 | static void vgacon_set_cursor_size(int xpos, int from, int to) | |
597 | { | |
598 | unsigned long flags; | |
599 | int curs, cure; | |
600 | ||
1da177e4 LT |
601 | if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) |
602 | return; | |
603 | cursor_size_lastfrom = from; | |
604 | cursor_size_lastto = to; | |
605 | ||
6b2c1800 | 606 | raw_spin_lock_irqsave(&vga_lock, flags); |
2115aea8 ST |
607 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
608 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); | |
609 | curs = inb_p(vga_video_port_val); | |
610 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); | |
611 | cure = inb_p(vga_video_port_val); | |
612 | } else { | |
613 | curs = 0; | |
614 | cure = 0; | |
615 | } | |
1da177e4 LT |
616 | |
617 | curs = (curs & 0xc0) | from; | |
618 | cure = (cure & 0xe0) | to; | |
619 | ||
2115aea8 | 620 | outb_p(VGA_CRTC_CURSOR_START, vga_video_port_reg); |
1da177e4 | 621 | outb_p(curs, vga_video_port_val); |
2115aea8 | 622 | outb_p(VGA_CRTC_CURSOR_END, vga_video_port_reg); |
1da177e4 | 623 | outb_p(cure, vga_video_port_val); |
6b2c1800 | 624 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
1da177e4 LT |
625 | } |
626 | ||
627 | static void vgacon_cursor(struct vc_data *c, int mode) | |
628 | { | |
2ae85477 AD |
629 | if (c->vc_mode != KD_TEXT) |
630 | return; | |
631 | ||
15bdab95 AD |
632 | vgacon_restore_screen(c); |
633 | ||
1da177e4 LT |
634 | switch (mode) { |
635 | case CM_ERASE: | |
88dcb6c4 | 636 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); |
2115aea8 ST |
637 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
638 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
639 | else | |
640 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
641 | break; |
642 | ||
643 | case CM_MOVE: | |
644 | case CM_DRAW: | |
645 | write_vga(14, (c->vc_pos - vga_vram_base) / 2); | |
646 | switch (c->vc_cursor_type & 0x0f) { | |
647 | case CUR_UNDERLINE: | |
648 | vgacon_set_cursor_size(c->vc_x, | |
649 | c->vc_font.height - | |
650 | (c->vc_font.height < | |
651 | 10 ? 2 : 3), | |
652 | c->vc_font.height - | |
653 | (c->vc_font.height < | |
654 | 10 ? 1 : 2)); | |
655 | break; | |
656 | case CUR_TWO_THIRDS: | |
657 | vgacon_set_cursor_size(c->vc_x, | |
658 | c->vc_font.height / 3, | |
659 | c->vc_font.height - | |
660 | (c->vc_font.height < | |
661 | 10 ? 1 : 2)); | |
662 | break; | |
663 | case CUR_LOWER_THIRD: | |
664 | vgacon_set_cursor_size(c->vc_x, | |
665 | (c->vc_font.height * 2) / 3, | |
666 | c->vc_font.height - | |
667 | (c->vc_font.height < | |
668 | 10 ? 1 : 2)); | |
669 | break; | |
670 | case CUR_LOWER_HALF: | |
671 | vgacon_set_cursor_size(c->vc_x, | |
672 | c->vc_font.height / 2, | |
673 | c->vc_font.height - | |
674 | (c->vc_font.height < | |
675 | 10 ? 1 : 2)); | |
676 | break; | |
677 | case CUR_NONE: | |
2115aea8 ST |
678 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
679 | vgacon_set_cursor_size(c->vc_x, 31, 30); | |
680 | else | |
681 | vgacon_set_cursor_size(c->vc_x, 31, 31); | |
1da177e4 LT |
682 | break; |
683 | default: | |
684 | vgacon_set_cursor_size(c->vc_x, 1, | |
685 | c->vc_font.height); | |
686 | break; | |
687 | } | |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
28254d43 ST |
692 | static int vgacon_doresize(struct vc_data *c, |
693 | unsigned int width, unsigned int height) | |
694 | { | |
695 | unsigned long flags; | |
696 | unsigned int scanlines = height * c->vc_font.height; | |
d1521260 | 697 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
28254d43 | 698 | |
6b2c1800 | 699 | raw_spin_lock_irqsave(&vga_lock, flags); |
28254d43 | 700 | |
53dbb26d AD |
701 | vgacon_xres = width * VGA_FONTWIDTH; |
702 | vgacon_yres = height * c->vc_font.height; | |
d1521260 ST |
703 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
704 | outb_p(VGA_CRTC_MAX_SCAN, vga_video_port_reg); | |
705 | max_scan = inb_p(vga_video_port_val); | |
28254d43 | 706 | |
d1521260 ST |
707 | if (max_scan & 0x80) |
708 | scanlines <<= 1; | |
28254d43 | 709 | |
d1521260 ST |
710 | outb_p(VGA_CRTC_MODE, vga_video_port_reg); |
711 | mode = inb_p(vga_video_port_val); | |
28254d43 | 712 | |
d1521260 ST |
713 | if (mode & 0x04) |
714 | scanlines >>= 1; | |
28254d43 | 715 | |
d1521260 ST |
716 | scanlines -= 1; |
717 | scanlines_lo = scanlines & 0xff; | |
28254d43 | 718 | |
d1521260 ST |
719 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); |
720 | r7 = inb_p(vga_video_port_val) & ~0x42; | |
721 | ||
722 | if (scanlines & 0x100) | |
723 | r7 |= 0x02; | |
724 | if (scanlines & 0x200) | |
725 | r7 |= 0x40; | |
726 | ||
727 | /* deprotect registers */ | |
728 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
729 | vsync_end = inb_p(vga_video_port_val); | |
730 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
731 | outb_p(vsync_end & ~0x80, vga_video_port_val); | |
732 | } | |
28254d43 ST |
733 | |
734 | outb_p(VGA_CRTC_H_DISP, vga_video_port_reg); | |
735 | outb_p(width - 1, vga_video_port_val); | |
736 | outb_p(VGA_CRTC_OFFSET, vga_video_port_reg); | |
737 | outb_p(width >> 1, vga_video_port_val); | |
738 | ||
d1521260 ST |
739 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
740 | outb_p(VGA_CRTC_V_DISP_END, vga_video_port_reg); | |
741 | outb_p(scanlines_lo, vga_video_port_val); | |
742 | outb_p(VGA_CRTC_OVERFLOW, vga_video_port_reg); | |
743 | outb_p(r7,vga_video_port_val); | |
28254d43 | 744 | |
d1521260 ST |
745 | /* reprotect registers */ |
746 | outb_p(VGA_CRTC_V_SYNC_END, vga_video_port_reg); | |
747 | outb_p(vsync_end, vga_video_port_val); | |
748 | } | |
28254d43 | 749 | |
6b2c1800 | 750 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
28254d43 ST |
751 | return 0; |
752 | } | |
753 | ||
1da177e4 LT |
754 | static int vgacon_switch(struct vc_data *c) |
755 | { | |
53dbb26d AD |
756 | int x = c->vc_cols * VGA_FONTWIDTH; |
757 | int y = c->vc_rows * c->vc_font.height; | |
3ea33510 | 758 | int rows = screen_info.orig_video_lines * vga_default_font_height/ |
53dbb26d | 759 | c->vc_font.height; |
1da177e4 LT |
760 | /* |
761 | * We need to save screen size here as it's the only way | |
762 | * we can spot the screen has been resized and we need to | |
763 | * set size of freshly allocated screens ourselves. | |
764 | */ | |
765 | vga_video_num_columns = c->vc_cols; | |
766 | vga_video_num_lines = c->vc_rows; | |
f18cd8f7 JS |
767 | |
768 | /* We can only copy out the size of the video buffer here, | |
769 | * otherwise we get into VGA BIOS */ | |
770 | ||
28254d43 | 771 | if (!vga_is_gfx) { |
1da177e4 | 772 | scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf, |
28254d43 ST |
773 | c->vc_screenbuf_size > vga_vram_size ? |
774 | vga_vram_size : c->vc_screenbuf_size); | |
53dbb26d AD |
775 | |
776 | if ((vgacon_xres != x || vgacon_yres != y) && | |
777 | (!(vga_video_num_columns % 2) && | |
3ea33510 | 778 | vga_video_num_columns <= screen_info.orig_video_cols && |
53dbb26d | 779 | vga_video_num_lines <= rows)) |
0aec4867 | 780 | vgacon_doresize(c, c->vc_cols, c->vc_rows); |
28254d43 ST |
781 | } |
782 | ||
15bdab95 | 783 | vgacon_scrollback_init(c->vc_size_row); |
1da177e4 LT |
784 | return 0; /* Redrawing not needed */ |
785 | } | |
786 | ||
8ede5cce | 787 | static void vga_set_palette(struct vc_data *vc, const unsigned char *table) |
1da177e4 LT |
788 | { |
789 | int i, j; | |
790 | ||
89f0244e | 791 | vga_w(vgastate.vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 | 792 | for (i = j = 0; i < 16; i++) { |
89f0244e MR |
793 | vga_w(vgastate.vgabase, VGA_PEL_IW, table[i]); |
794 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
795 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
796 | vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2); | |
1da177e4 LT |
797 | } |
798 | } | |
799 | ||
709280da | 800 | static void vgacon_set_palette(struct vc_data *vc, const unsigned char *table) |
1da177e4 | 801 | { |
1da177e4 | 802 | if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked |
6ca8dfd7 | 803 | || !con_is_visible(vc)) |
709280da | 804 | return; |
1da177e4 | 805 | vga_set_palette(vc, table); |
1da177e4 LT |
806 | } |
807 | ||
808 | /* structure holding original VGA register settings */ | |
809 | static struct { | |
810 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ | |
811 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ | |
812 | unsigned char CrtMiscIO; /* Miscellaneous register */ | |
813 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ | |
814 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ | |
815 | unsigned char StartHorizRetrace; /* CRT-Controller:04h */ | |
816 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ | |
817 | unsigned char Overflow; /* CRT-Controller:07h */ | |
818 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ | |
819 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ | |
820 | unsigned char ModeControl; /* CRT-Controller:17h */ | |
821 | unsigned char ClockingMode; /* Seq-Controller:01h */ | |
822 | } vga_state; | |
823 | ||
824 | static void vga_vesa_blank(struct vgastate *state, int mode) | |
825 | { | |
826 | /* save original values of VGA controller registers */ | |
827 | if (!vga_vesa_blanked) { | |
6b2c1800 | 828 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
829 | vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I); |
830 | vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg); | |
831 | vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R); | |
6b2c1800 | 832 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
833 | |
834 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
835 | vga_state.HorizontalTotal = inb_p(vga_video_port_val); | |
836 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
837 | vga_state.HorizDisplayEnd = inb_p(vga_video_port_val); | |
838 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
839 | vga_state.StartHorizRetrace = inb_p(vga_video_port_val); | |
840 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
841 | vga_state.EndHorizRetrace = inb_p(vga_video_port_val); | |
842 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
843 | vga_state.Overflow = inb_p(vga_video_port_val); | |
844 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
845 | vga_state.StartVertRetrace = inb_p(vga_video_port_val); | |
846 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
847 | vga_state.EndVertRetrace = inb_p(vga_video_port_val); | |
848 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
849 | vga_state.ModeControl = inb_p(vga_video_port_val); | |
850 | vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); | |
851 | } | |
852 | ||
853 | /* assure that video is enabled */ | |
854 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ | |
6b2c1800 | 855 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
856 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20); |
857 | ||
858 | /* test for vertical retrace in process.... */ | |
859 | if ((vga_state.CrtMiscIO & 0x80) == 0x80) | |
860 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF); | |
861 | ||
862 | /* | |
863 | * Set <End of vertical retrace> to minimum (0) and | |
864 | * <Start of vertical Retrace> to maximum (incl. overflow) | |
865 | * Result: turn off vertical sync (VSync) pulse. | |
866 | */ | |
867 | if (mode & VESA_VSYNC_SUSPEND) { | |
868 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
869 | outb_p(0xff, vga_video_port_val); /* maximum value */ | |
870 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
871 | outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */ | |
872 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
873 | outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */ | |
874 | } | |
875 | ||
876 | if (mode & VESA_HSYNC_SUSPEND) { | |
877 | /* | |
878 | * Set <End of horizontal retrace> to minimum (0) and | |
879 | * <Start of horizontal Retrace> to maximum | |
880 | * Result: turn off horizontal sync (HSync) pulse. | |
881 | */ | |
882 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
883 | outb_p(0xff, vga_video_port_val); /* maximum */ | |
884 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
885 | outb_p(0x00, vga_video_port_val); /* minimum (0) */ | |
886 | } | |
887 | ||
888 | /* restore both index registers */ | |
889 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
890 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
6b2c1800 | 891 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
892 | } |
893 | ||
894 | static void vga_vesa_unblank(struct vgastate *state) | |
895 | { | |
896 | /* restore original values of VGA controller registers */ | |
6b2c1800 | 897 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
898 | vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO); |
899 | ||
900 | outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */ | |
901 | outb_p(vga_state.HorizontalTotal, vga_video_port_val); | |
902 | outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */ | |
903 | outb_p(vga_state.HorizDisplayEnd, vga_video_port_val); | |
904 | outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */ | |
905 | outb_p(vga_state.StartHorizRetrace, vga_video_port_val); | |
906 | outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */ | |
907 | outb_p(vga_state.EndHorizRetrace, vga_video_port_val); | |
908 | outb_p(0x07, vga_video_port_reg); /* Overflow */ | |
909 | outb_p(vga_state.Overflow, vga_video_port_val); | |
910 | outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */ | |
911 | outb_p(vga_state.StartVertRetrace, vga_video_port_val); | |
912 | outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */ | |
913 | outb_p(vga_state.EndVertRetrace, vga_video_port_val); | |
914 | outb_p(0x17, vga_video_port_reg); /* ModeControl */ | |
915 | outb_p(vga_state.ModeControl, vga_video_port_val); | |
916 | /* ClockingMode */ | |
917 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode); | |
918 | ||
919 | /* restore index/control registers */ | |
920 | vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex); | |
921 | outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg); | |
6b2c1800 | 922 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
923 | } |
924 | ||
925 | static void vga_pal_blank(struct vgastate *state) | |
926 | { | |
927 | int i; | |
928 | ||
1a66ddcb | 929 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); |
1da177e4 LT |
930 | for (i = 0; i < 16; i++) { |
931 | vga_w(state->vgabase, VGA_PEL_IW, i); | |
932 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
933 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
934 | vga_w(state->vgabase, VGA_PEL_D, 0); | |
935 | } | |
936 | } | |
937 | ||
938 | static int vgacon_blank(struct vc_data *c, int blank, int mode_switch) | |
939 | { | |
940 | switch (blank) { | |
941 | case 0: /* Unblank */ | |
942 | if (vga_vesa_blanked) { | |
89f0244e | 943 | vga_vesa_unblank(&vgastate); |
1da177e4 LT |
944 | vga_vesa_blanked = 0; |
945 | } | |
946 | if (vga_palette_blanked) { | |
947 | vga_set_palette(c, color_table); | |
96fd9554 | 948 | vga_palette_blanked = false; |
1da177e4 LT |
949 | return 0; |
950 | } | |
96fd9554 | 951 | vga_is_gfx = false; |
1da177e4 LT |
952 | /* Tell console.c that it has to restore the screen itself */ |
953 | return 1; | |
954 | case 1: /* Normal blanking */ | |
955 | case -1: /* Obsolete */ | |
956 | if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { | |
89f0244e | 957 | vga_pal_blank(&vgastate); |
96fd9554 | 958 | vga_palette_blanked = true; |
1da177e4 LT |
959 | return 0; |
960 | } | |
961 | vgacon_set_origin(c); | |
962 | scr_memsetw((void *) vga_vram_base, BLANK, | |
963 | c->vc_screenbuf_size); | |
964 | if (mode_switch) | |
96fd9554 | 965 | vga_is_gfx = true; |
1da177e4 LT |
966 | return 1; |
967 | default: /* VESA blanking */ | |
968 | if (vga_video_type == VIDEO_TYPE_VGAC) { | |
89f0244e | 969 | vga_vesa_blank(&vgastate, blank - 1); |
1da177e4 LT |
970 | vga_vesa_blanked = blank; |
971 | } | |
972 | return 0; | |
973 | } | |
974 | } | |
975 | ||
976 | /* | |
977 | * PIO_FONT support. | |
978 | * | |
979 | * The font loading code goes back to the codepage package by | |
980 | * Joel Hoffman (joel@wam.umd.edu). (He reports that the original | |
981 | * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 | |
982 | * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) | |
983 | * | |
984 | * Change for certain monochrome monitors by Yury Shevchuck | |
985 | * (sizif@botik.yaroslavl.su). | |
986 | */ | |
987 | ||
1da177e4 LT |
988 | #define colourmap 0xa0000 |
989 | /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we | |
990 | should use 0xA0000 for the bwmap as well.. */ | |
991 | #define blackwmap 0xa0000 | |
992 | #define cmapsz 8192 | |
993 | ||
96fd9554 JS |
994 | static int vgacon_do_font_op(struct vgastate *state, char *arg, int set, |
995 | bool ch512) | |
1da177e4 LT |
996 | { |
997 | unsigned short video_port_status = vga_video_port_reg + 6; | |
998 | int font_select = 0x00, beg, i; | |
999 | char *charmap; | |
2a248307 | 1000 | bool clear_attribs = false; |
1da177e4 | 1001 | if (vga_video_type != VIDEO_TYPE_EGAM) { |
4f1bcaf0 | 1002 | charmap = (char *) VGA_MAP_MEM(colourmap, 0); |
1da177e4 | 1003 | beg = 0x0e; |
1da177e4 | 1004 | } else { |
4f1bcaf0 | 1005 | charmap = (char *) VGA_MAP_MEM(blackwmap, 0); |
1da177e4 LT |
1006 | beg = 0x0a; |
1007 | } | |
1008 | ||
1009 | #ifdef BROKEN_GRAPHICS_PROGRAMS | |
1010 | /* | |
1011 | * All fonts are loaded in slot 0 (0:1 for 512 ch) | |
1012 | */ | |
1013 | ||
1014 | if (!arg) | |
1015 | return -EINVAL; /* Return to default font not supported */ | |
1016 | ||
96fd9554 | 1017 | vga_font_is_default = false; |
1da177e4 LT |
1018 | font_select = ch512 ? 0x04 : 0x00; |
1019 | #else | |
1020 | /* | |
1021 | * The default font is kept in slot 0 and is never touched. | |
1022 | * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch) | |
1023 | */ | |
1024 | ||
1025 | if (set) { | |
1026 | vga_font_is_default = !arg; | |
1027 | if (!arg) | |
96fd9554 | 1028 | ch512 = false; /* Default font is always 256 */ |
1da177e4 LT |
1029 | font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00; |
1030 | } | |
1031 | ||
1032 | if (!vga_font_is_default) | |
1033 | charmap += 4 * cmapsz; | |
1034 | #endif | |
1035 | ||
6b2c1800 | 1036 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1037 | /* First, the Sequencer */ |
1038 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
1039 | /* CPU writes only to map 2 */ | |
1040 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04); | |
1041 | /* Sequential addressing */ | |
1042 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07); | |
1043 | /* Clear synchronous reset */ | |
1044 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1045 | ||
1046 | /* Now, the graphics controller, select map 2 */ | |
1047 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02); | |
1048 | /* disable odd-even addressing */ | |
1049 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00); | |
1050 | /* map start at A000:0000 */ | |
1051 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00); | |
6b2c1800 | 1052 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
1053 | |
1054 | if (arg) { | |
1055 | if (set) | |
7e6d72c1 | 1056 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1057 | vga_writeb(arg[i], charmap + i); |
7e6d72c1 MT |
1058 | cond_resched(); |
1059 | } | |
1da177e4 | 1060 | else |
7e6d72c1 | 1061 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1062 | arg[i] = vga_readb(charmap + i); |
7e6d72c1 MT |
1063 | cond_resched(); |
1064 | } | |
1da177e4 LT |
1065 | |
1066 | /* | |
1067 | * In 512-character mode, the character map is not contiguous if | |
1068 | * we want to remain EGA compatible -- which we do | |
1069 | */ | |
1070 | ||
1071 | if (ch512) { | |
1072 | charmap += 2 * cmapsz; | |
1073 | arg += cmapsz; | |
1074 | if (set) | |
7e6d72c1 | 1075 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1076 | vga_writeb(arg[i], charmap + i); |
7e6d72c1 MT |
1077 | cond_resched(); |
1078 | } | |
1da177e4 | 1079 | else |
7e6d72c1 | 1080 | for (i = 0; i < cmapsz; i++) { |
1da177e4 | 1081 | arg[i] = vga_readb(charmap + i); |
7e6d72c1 MT |
1082 | cond_resched(); |
1083 | } | |
1da177e4 LT |
1084 | } |
1085 | } | |
1086 | ||
6b2c1800 | 1087 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1088 | /* First, the sequencer, Synchronous reset */ |
1089 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); | |
1090 | /* CPU writes to maps 0 and 1 */ | |
1091 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03); | |
1092 | /* odd-even addressing */ | |
1093 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03); | |
1094 | /* Character Map Select */ | |
1095 | if (set) | |
1096 | vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select); | |
1097 | /* clear synchronous reset */ | |
1098 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
1099 | ||
1100 | /* Now, the graphics controller, select map 0 for CPU */ | |
1101 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00); | |
1102 | /* enable even-odd addressing */ | |
1103 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10); | |
1104 | /* map starts at b800:0 or b000:0 */ | |
1105 | vga_wgfx(state->vgabase, VGA_GFX_MISC, beg); | |
1106 | ||
1107 | /* if 512 char mode is already enabled don't re-enable it. */ | |
1108 | if ((set) && (ch512 != vga_512_chars)) { | |
1da177e4 LT |
1109 | vga_512_chars = ch512; |
1110 | /* 256-char: enable intensity bit | |
1111 | 512-char: disable intensity bit */ | |
1112 | inb_p(video_port_status); /* clear address flip-flop */ | |
1113 | /* color plane enable register */ | |
1114 | vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f); | |
1115 | /* Wilton (1987) mentions the following; I don't know what | |
1116 | it means, but it works, and it appears necessary */ | |
1117 | inb_p(video_port_status); | |
1118 | vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0); | |
2a248307 | 1119 | clear_attribs = true; |
1da177e4 | 1120 | } |
6b2c1800 | 1121 | raw_spin_unlock_irq(&vga_lock); |
2a248307 DA |
1122 | |
1123 | if (clear_attribs) { | |
1124 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1125 | struct vc_data *c = vc_cons[i].d; | |
1126 | if (c && c->vc_sw == &vga_con) { | |
1127 | /* force hi font mask to 0, so we always clear | |
1128 | the bit on either transition */ | |
1129 | c->vc_hi_font_mask = 0x00; | |
1130 | clear_buffer_attributes(c); | |
1131 | c->vc_hi_font_mask = ch512 ? 0x0800 : 0; | |
1132 | } | |
1133 | } | |
1134 | } | |
1da177e4 LT |
1135 | return 0; |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Adjust the screen to fit a font of a certain height | |
1140 | */ | |
1141 | static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) | |
1142 | { | |
1143 | unsigned char ovr, vde, fsr; | |
1144 | int rows, maxscan, i; | |
1145 | ||
1146 | rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ | |
1147 | maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ | |
1148 | ||
1149 | /* Reprogram the CRTC for the new font size | |
1150 | Note: the attempt to read the overflow register will fail | |
1151 | on an EGA, but using 0xff for the previous value appears to | |
1152 | be OK for EGA text modes in the range 257-512 scan lines, so I | |
1153 | guess we don't need to worry about it. | |
1154 | ||
1155 | The same applies for the spill bits in the font size and cursor | |
1156 | registers; they are write-only on EGA, but it appears that they | |
1157 | are all don't care bits on EGA, so I guess it doesn't matter. */ | |
1158 | ||
6b2c1800 | 1159 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1160 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
1161 | ovr = inb_p(vga_video_port_val); | |
1162 | outb_p(0x09, vga_video_port_reg); /* Font size register */ | |
1163 | fsr = inb_p(vga_video_port_val); | |
6b2c1800 | 1164 | raw_spin_unlock_irq(&vga_lock); |
1da177e4 LT |
1165 | |
1166 | vde = maxscan & 0xff; /* Vertical display end reg */ | |
1167 | ovr = (ovr & 0xbd) + /* Overflow register */ | |
1168 | ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); | |
1169 | fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ | |
1170 | ||
6b2c1800 | 1171 | raw_spin_lock_irq(&vga_lock); |
1da177e4 LT |
1172 | outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */ |
1173 | outb_p(ovr, vga_video_port_val); | |
1174 | outb_p(0x09, vga_video_port_reg); /* Font size */ | |
1175 | outb_p(fsr, vga_video_port_val); | |
1176 | outb_p(0x12, vga_video_port_reg); /* Vertical display limit */ | |
1177 | outb_p(vde, vga_video_port_val); | |
6b2c1800 | 1178 | raw_spin_unlock_irq(&vga_lock); |
5ef897c7 | 1179 | vga_video_font_height = fontheight; |
1da177e4 LT |
1180 | |
1181 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1182 | struct vc_data *c = vc_cons[i].d; | |
1183 | ||
1184 | if (c && c->vc_sw == &vga_con) { | |
6ca8dfd7 | 1185 | if (con_is_visible(c)) { |
1da177e4 LT |
1186 | /* void size to cause regs to be rewritten */ |
1187 | cursor_size_lastfrom = 0; | |
1188 | cursor_size_lastto = 0; | |
1189 | c->vc_sw->con_cursor(c, CM_DRAW); | |
1190 | } | |
1191 | c->vc_font.height = fontheight; | |
1192 | vc_resize(c, 0, rows); /* Adjust console size */ | |
1193 | } | |
1194 | } | |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags) | |
1199 | { | |
1200 | unsigned charcount = font->charcount; | |
1201 | int rc; | |
1202 | ||
1203 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1204 | return -EINVAL; | |
1205 | ||
53dbb26d AD |
1206 | if (font->width != VGA_FONTWIDTH || |
1207 | (charcount != 256 && charcount != 512)) | |
1da177e4 LT |
1208 | return -EINVAL; |
1209 | ||
89f0244e | 1210 | rc = vgacon_do_font_op(&vgastate, font->data, 1, charcount == 512); |
1da177e4 LT |
1211 | if (rc) |
1212 | return rc; | |
1213 | ||
1214 | if (!(flags & KD_FONT_FLAG_DONT_RECALC)) | |
1215 | rc = vgacon_adjust_height(c, font->height); | |
1216 | return rc; | |
1217 | } | |
1218 | ||
1219 | static int vgacon_font_get(struct vc_data *c, struct console_font *font) | |
1220 | { | |
1221 | if (vga_video_type < VIDEO_TYPE_EGAM) | |
1222 | return -EINVAL; | |
1223 | ||
53dbb26d | 1224 | font->width = VGA_FONTWIDTH; |
1da177e4 LT |
1225 | font->height = c->vc_font.height; |
1226 | font->charcount = vga_512_chars ? 512 : 256; | |
1227 | if (!font->data) | |
1228 | return 0; | |
89f0244e | 1229 | return vgacon_do_font_op(&vgastate, font->data, 0, vga_512_chars); |
1da177e4 LT |
1230 | } |
1231 | ||
28254d43 | 1232 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
e400b6ec | 1233 | unsigned int height, unsigned int user) |
28254d43 | 1234 | { |
3ea33510 PA |
1235 | if (width % 2 || width > screen_info.orig_video_cols || |
1236 | height > (screen_info.orig_video_lines * vga_default_font_height)/ | |
6d36ba62 | 1237 | c->vc_font.height) |
e400b6ec AD |
1238 | /* let svgatextmode tinker with video timings and |
1239 | return success */ | |
1240 | return (user) ? 0 : -EINVAL; | |
28254d43 | 1241 | |
6ca8dfd7 | 1242 | if (con_is_visible(c) && !vga_is_gfx) /* who knows */ |
28254d43 ST |
1243 | vgacon_doresize(c, width, height); |
1244 | return 0; | |
1245 | } | |
1246 | ||
1da177e4 LT |
1247 | static int vgacon_set_origin(struct vc_data *c) |
1248 | { | |
1249 | if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ | |
1250 | (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ | |
1251 | return 0; | |
1252 | c->vc_origin = c->vc_visible_origin = vga_vram_base; | |
1253 | vga_set_mem_top(c); | |
1254 | vga_rolled_over = 0; | |
1255 | return 1; | |
1256 | } | |
1257 | ||
1258 | static void vgacon_save_screen(struct vc_data *c) | |
1259 | { | |
1260 | static int vga_bootup_console = 0; | |
1261 | ||
1262 | if (!vga_bootup_console) { | |
1263 | /* This is a gross hack, but here is the only place we can | |
1264 | * set bootup console parameters without messing up generic | |
1265 | * console initialization routines. | |
1266 | */ | |
1267 | vga_bootup_console = 1; | |
3ea33510 PA |
1268 | c->vc_x = screen_info.orig_x; |
1269 | c->vc_y = screen_info.orig_y; | |
1da177e4 | 1270 | } |
f18cd8f7 | 1271 | |
025dfdaf | 1272 | /* We can't copy in more than the size of the video buffer, |
f18cd8f7 JS |
1273 | * or we'll be copying in VGA BIOS */ |
1274 | ||
1da177e4 LT |
1275 | if (!vga_is_gfx) |
1276 | scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin, | |
f18cd8f7 | 1277 | c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); |
1da177e4 LT |
1278 | } |
1279 | ||
d705ff38 JS |
1280 | static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b, |
1281 | enum con_scroll dir, unsigned int lines) | |
1da177e4 LT |
1282 | { |
1283 | unsigned long oldo; | |
1284 | unsigned int delta; | |
1285 | ||
2ae85477 | 1286 | if (t || b != c->vc_rows || vga_is_gfx || c->vc_mode != KD_TEXT) |
d705ff38 | 1287 | return false; |
1da177e4 | 1288 | |
1da177e4 | 1289 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
d705ff38 | 1290 | return false; |
1da177e4 | 1291 | |
15bdab95 | 1292 | vgacon_restore_screen(c); |
1da177e4 LT |
1293 | oldo = c->vc_origin; |
1294 | delta = lines * c->vc_size_row; | |
1295 | if (dir == SM_UP) { | |
15bdab95 | 1296 | vgacon_scrollback_update(c, t, lines); |
1da177e4 LT |
1297 | if (c->vc_scr_end + delta >= vga_vram_end) { |
1298 | scr_memcpyw((u16 *) vga_vram_base, | |
1299 | (u16 *) (oldo + delta), | |
1300 | c->vc_screenbuf_size - delta); | |
1301 | c->vc_origin = vga_vram_base; | |
1302 | vga_rolled_over = oldo - vga_vram_base; | |
1303 | } else | |
1304 | c->vc_origin += delta; | |
1305 | scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size - | |
93f78da4 | 1306 | delta), c->vc_video_erase_char, |
1da177e4 LT |
1307 | delta); |
1308 | } else { | |
1309 | if (oldo - delta < vga_vram_base) { | |
1310 | scr_memmovew((u16 *) (vga_vram_end - | |
1311 | c->vc_screenbuf_size + | |
1312 | delta), (u16 *) oldo, | |
1313 | c->vc_screenbuf_size - delta); | |
1314 | c->vc_origin = vga_vram_end - c->vc_screenbuf_size; | |
1315 | vga_rolled_over = 0; | |
1316 | } else | |
1317 | c->vc_origin -= delta; | |
1318 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
93f78da4 | 1319 | scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char, |
1da177e4 LT |
1320 | delta); |
1321 | } | |
1322 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; | |
1323 | c->vc_visible_origin = c->vc_origin; | |
1324 | vga_set_mem_top(c); | |
1325 | c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; | |
d705ff38 | 1326 | return true; |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | ||
1330 | /* | |
1331 | * The console `switch' structure for the VGA based console | |
1332 | */ | |
1333 | ||
1334 | static int vgacon_dummy(struct vc_data *c) | |
1335 | { | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | #define DUMMY (void *) vgacon_dummy | |
1340 | ||
1341 | const struct consw vga_con = { | |
1342 | .owner = THIS_MODULE, | |
1343 | .con_startup = vgacon_startup, | |
1344 | .con_init = vgacon_init, | |
1345 | .con_deinit = vgacon_deinit, | |
1346 | .con_clear = DUMMY, | |
1347 | .con_putc = DUMMY, | |
1348 | .con_putcs = DUMMY, | |
1349 | .con_cursor = vgacon_cursor, | |
1350 | .con_scroll = vgacon_scroll, | |
1da177e4 LT |
1351 | .con_switch = vgacon_switch, |
1352 | .con_blank = vgacon_blank, | |
1353 | .con_font_set = vgacon_font_set, | |
1354 | .con_font_get = vgacon_font_get, | |
28254d43 | 1355 | .con_resize = vgacon_resize, |
1da177e4 LT |
1356 | .con_set_palette = vgacon_set_palette, |
1357 | .con_scrolldelta = vgacon_scrolldelta, | |
1358 | .con_set_origin = vgacon_set_origin, | |
1359 | .con_save_screen = vgacon_save_screen, | |
1360 | .con_build_attr = vgacon_build_attr, | |
1361 | .con_invert_region = vgacon_invert_region, | |
1362 | }; | |
a4de0526 | 1363 | EXPORT_SYMBOL(vga_con); |
1da177e4 LT |
1364 | |
1365 | MODULE_LICENSE("GPL"); |