1 | /* |
2 | * linux/drivers/video/vgacon.c -- Low level VGA based console driver |
3 | * |
4 | * Created 28 Sep 1997 by Geert Uytterhoeven |
5 | * |
6 | * Rewritten by Martin Mares <mj@ucw.cz>, July 1998 |
7 | * |
8 | * This file is based on the old console.c, vga.c and vesa_blank.c drivers. |
9 | * |
10 | * Copyright (C) 1991, 1992 Linus Torvalds |
11 | * 1995 Jay Estabrook |
12 | * |
13 | * User definable mapping table and font loading by Eugene G. Crosser, |
14 | * <crosser@average.org> |
15 | * |
16 | * Improved loadable font/UTF-8 support by H. Peter Anvin |
17 | * Feb-Sep 1995 <peter.anvin@linux.org> |
18 | * |
19 | * Colour palette handling, by Simon Tatham |
20 | * 17-Jun-95 <sgt20@cam.ac.uk> |
21 | * |
22 | * if 512 char mode is already enabled don't re-enable it, |
23 | * because it causes screen to flicker, by Mitja Horvat |
24 | * 5-May-96 <mitja.horvat@guest.arnes.si> |
25 | * |
26 | * Use 2 outw instead of 4 outb_p to reduce erroneous text |
27 | * flashing on RHS of screen during heavy console scrolling . |
28 | * Oct 1996, Paul Gortmaker. |
29 | * |
30 | * |
31 | * This file is subject to the terms and conditions of the GNU General Public |
32 | * License. See the file COPYING in the main directory of this archive for |
33 | * more details. |
34 | */ |
35 | |
36 | #include <linux/module.h> |
37 | #include <linux/types.h> |
38 | #include <linux/fs.h> |
39 | #include <linux/kernel.h> |
40 | #include <linux/console.h> |
41 | #include <linux/string.h> |
42 | #include <linux/kd.h> |
43 | #include <linux/slab.h> |
44 | #include <linux/vt_kern.h> |
45 | #include <linux/sched.h> |
46 | #include <linux/selection.h> |
47 | #include <linux/spinlock.h> |
48 | #include <linux/ioport.h> |
49 | #include <linux/init.h> |
50 | #include <linux/screen_info.h> |
51 | #include <video/vga.h> |
52 | #include <asm/io.h> |
53 | |
54 | static DEFINE_RAW_SPINLOCK(vga_lock); |
55 | static int cursor_size_lastfrom; |
56 | static int cursor_size_lastto; |
57 | static u32 vgacon_xres; |
58 | static u32 vgacon_yres; |
59 | static struct vgastate vgastate; |
60 | |
61 | #define BLANK 0x0020 |
62 | |
63 | #define VGA_FONTWIDTH 8 /* VGA does not support fontwidths != 8 */ |
64 | /* |
65 | * Interface used by the world |
66 | */ |
67 | |
68 | static bool vgacon_set_origin(struct vc_data *c); |
69 | |
70 | static struct uni_pagedict *vgacon_uni_pagedir; |
71 | static int vgacon_refcount; |
72 | |
73 | /* Description of the hardware situation */ |
74 | static unsigned long vga_vram_base __read_mostly; /* Base of video memory */ |
75 | static unsigned long vga_vram_end __read_mostly; /* End of video memory */ |
76 | static unsigned int vga_vram_size __read_mostly; /* Size of video memory */ |
77 | static u16 vga_video_port_reg __read_mostly; /* Video register select port */ |
78 | static u16 vga_video_port_val __read_mostly; /* Video register value port */ |
79 | static unsigned int vga_video_num_columns; /* Number of text columns */ |
80 | static unsigned int vga_video_num_lines; /* Number of text lines */ |
81 | static bool vga_can_do_color; /* Do we support colors? */ |
82 | static unsigned int vga_default_font_height __read_mostly; /* Height of default screen font */ |
83 | static unsigned char vga_video_type __read_mostly; /* Card type */ |
84 | static enum vesa_blank_mode vga_vesa_blanked; |
85 | static bool vga_palette_blanked; |
86 | static bool vga_is_gfx; |
87 | static bool vga_512_chars; |
88 | static int vga_video_font_height; |
89 | static int vga_scan_lines __read_mostly; |
90 | static unsigned int vga_rolled_over; /* last vc_origin offset before wrap */ |
91 | |
92 | static struct screen_info *vga_si; |
93 | |
94 | static bool vga_hardscroll_enabled; |
95 | static bool vga_hardscroll_user_enable = true; |
96 | |
97 | static int __init no_scroll(char *str) |
98 | { |
99 | /* |
100 | * Disabling scrollback is required for the Braillex ib80-piezo |
101 | * Braille reader made by F.H. Papenmeier (Germany). |
102 | * Use the "no-scroll" bootflag. |
103 | */ |
104 | vga_hardscroll_user_enable = vga_hardscroll_enabled = false; |
105 | return 1; |
106 | } |
107 | |
108 | __setup("no-scroll" , no_scroll); |
109 | |
110 | /* |
111 | * By replacing the four outb_p with two back to back outw, we can reduce |
112 | * the window of opportunity to see text mislocated to the RHS of the |
113 | * console during heavy scrolling activity. However there is the remote |
114 | * possibility that some pre-dinosaur hardware won't like the back to back |
115 | * I/O. Since the Xservers get away with it, we should be able to as well. |
116 | */ |
117 | static inline void write_vga(unsigned char reg, unsigned int val) |
118 | { |
119 | unsigned int v1, v2; |
120 | unsigned long flags; |
121 | |
122 | /* |
123 | * ddprintk might set the console position from interrupt |
124 | * handlers, thus the write has to be IRQ-atomic. |
125 | */ |
126 | raw_spin_lock_irqsave(&vga_lock, flags); |
127 | v1 = reg + (val & 0xff00); |
128 | v2 = reg + 1 + ((val << 8) & 0xff00); |
129 | outw(value: v1, port: vga_video_port_reg); |
130 | outw(value: v2, port: vga_video_port_reg); |
131 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
132 | } |
133 | |
134 | static inline void vga_set_mem_top(struct vc_data *c) |
135 | { |
136 | write_vga(reg: 12, val: (c->vc_visible_origin - vga_vram_base) / 2); |
137 | } |
138 | |
139 | static void vgacon_scrolldelta(struct vc_data *c, int lines) |
140 | { |
141 | unsigned long scr_end = c->vc_scr_end - vga_vram_base; |
142 | unsigned long vorigin = c->vc_visible_origin - vga_vram_base; |
143 | unsigned long origin = c->vc_origin - vga_vram_base; |
144 | int margin = c->vc_size_row * 4; |
145 | int from, wrap, from_off, avail; |
146 | |
147 | /* Turn scrollback off */ |
148 | if (!lines) { |
149 | c->vc_visible_origin = c->vc_origin; |
150 | return; |
151 | } |
152 | |
153 | /* Do we have already enough to allow jumping from 0 to the end? */ |
154 | if (vga_rolled_over > scr_end + margin) { |
155 | from = scr_end; |
156 | wrap = vga_rolled_over + c->vc_size_row; |
157 | } else { |
158 | from = 0; |
159 | wrap = vga_vram_size; |
160 | } |
161 | |
162 | from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row; |
163 | avail = (origin - from + wrap) % wrap; |
164 | |
165 | /* Only a little piece would be left? Show all incl. the piece! */ |
166 | if (avail < 2 * margin) |
167 | margin = 0; |
168 | if (from_off < margin) |
169 | from_off = 0; |
170 | if (from_off > avail - margin) |
171 | from_off = avail; |
172 | |
173 | c->vc_visible_origin = vga_vram_base + (from + from_off) % wrap; |
174 | |
175 | vga_set_mem_top(c); |
176 | } |
177 | |
178 | static void vgacon_restore_screen(struct vc_data *c) |
179 | { |
180 | if (c->vc_origin != c->vc_visible_origin) |
181 | vgacon_scrolldelta(c, lines: 0); |
182 | } |
183 | |
184 | static const char *vgacon_startup(void) |
185 | { |
186 | const char *display_desc = NULL; |
187 | u16 saved1, saved2; |
188 | volatile u16 *p; |
189 | |
190 | if (!vga_si || |
191 | vga_si->orig_video_isVGA == VIDEO_TYPE_VLFB || |
192 | vga_si->orig_video_isVGA == VIDEO_TYPE_EFI) { |
193 | no_vga: |
194 | #ifdef CONFIG_DUMMY_CONSOLE |
195 | conswitchp = &dummy_con; |
196 | return conswitchp->con_startup(); |
197 | #else |
198 | return NULL; |
199 | #endif |
200 | } |
201 | |
202 | /* vga_si reasonably initialized? */ |
203 | if ((vga_si->orig_video_lines == 0) || |
204 | (vga_si->orig_video_cols == 0)) |
205 | goto no_vga; |
206 | |
207 | /* VGA16 modes are not handled by VGACON */ |
208 | if ((vga_si->orig_video_mode == 0x0D) || /* 320x200/4 */ |
209 | (vga_si->orig_video_mode == 0x0E) || /* 640x200/4 */ |
210 | (vga_si->orig_video_mode == 0x10) || /* 640x350/4 */ |
211 | (vga_si->orig_video_mode == 0x12) || /* 640x480/4 */ |
212 | (vga_si->orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ |
213 | goto no_vga; |
214 | |
215 | vga_video_num_lines = vga_si->orig_video_lines; |
216 | vga_video_num_columns = vga_si->orig_video_cols; |
217 | vgastate.vgabase = NULL; |
218 | |
219 | if (vga_si->orig_video_mode == 7) { |
220 | /* Monochrome display */ |
221 | vga_vram_base = 0xb0000; |
222 | vga_video_port_reg = VGA_CRT_IM; |
223 | vga_video_port_val = VGA_CRT_DM; |
224 | if ((vga_si->orig_video_ega_bx & 0xff) != 0x10) { |
225 | static struct resource ega_console_resource = |
226 | { .name = "ega" , |
227 | .flags = IORESOURCE_IO, |
228 | .start = 0x3B0, |
229 | .end = 0x3BF }; |
230 | vga_video_type = VIDEO_TYPE_EGAM; |
231 | vga_vram_size = 0x8000; |
232 | display_desc = "EGA+" ; |
233 | request_resource(root: &ioport_resource, |
234 | new: &ega_console_resource); |
235 | } else { |
236 | static struct resource mda1_console_resource = |
237 | { .name = "mda" , |
238 | .flags = IORESOURCE_IO, |
239 | .start = 0x3B0, |
240 | .end = 0x3BB }; |
241 | static struct resource mda2_console_resource = |
242 | { .name = "mda" , |
243 | .flags = IORESOURCE_IO, |
244 | .start = 0x3BF, |
245 | .end = 0x3BF }; |
246 | vga_video_type = VIDEO_TYPE_MDA; |
247 | vga_vram_size = 0x2000; |
248 | display_desc = "*MDA" ; |
249 | request_resource(root: &ioport_resource, |
250 | new: &mda1_console_resource); |
251 | request_resource(root: &ioport_resource, |
252 | new: &mda2_console_resource); |
253 | vga_video_font_height = 14; |
254 | } |
255 | } else { |
256 | /* If not, it is color. */ |
257 | vga_can_do_color = true; |
258 | vga_vram_base = 0xb8000; |
259 | vga_video_port_reg = VGA_CRT_IC; |
260 | vga_video_port_val = VGA_CRT_DC; |
261 | if ((vga_si->orig_video_ega_bx & 0xff) != 0x10) { |
262 | int i; |
263 | |
264 | vga_vram_size = 0x8000; |
265 | |
266 | if (!vga_si->orig_video_isVGA) { |
267 | static struct resource ega_console_resource = |
268 | { .name = "ega" , |
269 | .flags = IORESOURCE_IO, |
270 | .start = 0x3C0, |
271 | .end = 0x3DF }; |
272 | vga_video_type = VIDEO_TYPE_EGAC; |
273 | display_desc = "EGA" ; |
274 | request_resource(root: &ioport_resource, |
275 | new: &ega_console_resource); |
276 | } else { |
277 | static struct resource vga_console_resource = |
278 | { .name = "vga+" , |
279 | .flags = IORESOURCE_IO, |
280 | .start = 0x3C0, |
281 | .end = 0x3DF }; |
282 | vga_video_type = VIDEO_TYPE_VGAC; |
283 | display_desc = "VGA+" ; |
284 | request_resource(root: &ioport_resource, |
285 | new: &vga_console_resource); |
286 | |
287 | /* |
288 | * Normalise the palette registers, to point |
289 | * the 16 screen colours to the first 16 |
290 | * DAC entries. |
291 | */ |
292 | |
293 | for (i = 0; i < 16; i++) { |
294 | inb_p(VGA_IS1_RC); |
295 | outb_p(value: i, VGA_ATT_W); |
296 | outb_p(value: i, VGA_ATT_W); |
297 | } |
298 | outb_p(value: 0x20, VGA_ATT_W); |
299 | |
300 | /* |
301 | * Now set the DAC registers back to their |
302 | * default values |
303 | */ |
304 | for (i = 0; i < 16; i++) { |
305 | outb_p(value: color_table[i], VGA_PEL_IW); |
306 | outb_p(value: default_red[i], VGA_PEL_D); |
307 | outb_p(value: default_grn[i], VGA_PEL_D); |
308 | outb_p(value: default_blu[i], VGA_PEL_D); |
309 | } |
310 | } |
311 | } else { |
312 | static struct resource cga_console_resource = |
313 | { .name = "cga" , |
314 | .flags = IORESOURCE_IO, |
315 | .start = 0x3D4, |
316 | .end = 0x3D5 }; |
317 | vga_video_type = VIDEO_TYPE_CGA; |
318 | vga_vram_size = 0x2000; |
319 | display_desc = "*CGA" ; |
320 | request_resource(root: &ioport_resource, |
321 | new: &cga_console_resource); |
322 | vga_video_font_height = 8; |
323 | } |
324 | } |
325 | |
326 | vga_vram_base = VGA_MAP_MEM(vga_vram_base, vga_vram_size); |
327 | vga_vram_end = vga_vram_base + vga_vram_size; |
328 | |
329 | /* |
330 | * Find out if there is a graphics card present. |
331 | * Are there smarter methods around? |
332 | */ |
333 | p = (volatile u16 *) vga_vram_base; |
334 | saved1 = scr_readw(p); |
335 | saved2 = scr_readw(p + 1); |
336 | scr_writew(0xAA55, p); |
337 | scr_writew(0x55AA, p + 1); |
338 | if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { |
339 | scr_writew(saved1, p); |
340 | scr_writew(saved2, p + 1); |
341 | goto no_vga; |
342 | } |
343 | scr_writew(0x55AA, p); |
344 | scr_writew(0xAA55, p + 1); |
345 | if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { |
346 | scr_writew(saved1, p); |
347 | scr_writew(saved2, p + 1); |
348 | goto no_vga; |
349 | } |
350 | scr_writew(saved1, p); |
351 | scr_writew(saved2, p + 1); |
352 | |
353 | if (vga_video_type == VIDEO_TYPE_EGAC |
354 | || vga_video_type == VIDEO_TYPE_VGAC |
355 | || vga_video_type == VIDEO_TYPE_EGAM) { |
356 | vga_hardscroll_enabled = vga_hardscroll_user_enable; |
357 | vga_default_font_height = vga_si->orig_video_points; |
358 | vga_video_font_height = vga_si->orig_video_points; |
359 | /* This may be suboptimal but is a safe bet - go with it */ |
360 | vga_scan_lines = |
361 | vga_video_font_height * vga_video_num_lines; |
362 | } |
363 | |
364 | vgacon_xres = vga_si->orig_video_cols * VGA_FONTWIDTH; |
365 | vgacon_yres = vga_scan_lines; |
366 | |
367 | return display_desc; |
368 | } |
369 | |
370 | static void vgacon_init(struct vc_data *c, bool init) |
371 | { |
372 | struct uni_pagedict *p; |
373 | |
374 | /* |
375 | * We cannot be loaded as a module, therefore init will be 1 |
376 | * if we are the default console, however if we are a fallback |
377 | * console, for example if fbcon has failed registration, then |
378 | * init will be 0, so we need to make sure our boot parameters |
379 | * have been copied to the console structure for vgacon_resize |
380 | * ultimately called by vc_resize. Any subsequent calls to |
381 | * vgacon_init init will have init set to 0 too. |
382 | */ |
383 | c->vc_can_do_color = vga_can_do_color; |
384 | c->vc_scan_lines = vga_scan_lines; |
385 | c->vc_font.height = c->vc_cell_height = vga_video_font_height; |
386 | |
387 | /* set dimensions manually if init is true since vc_resize() will fail */ |
388 | if (init) { |
389 | c->vc_cols = vga_video_num_columns; |
390 | c->vc_rows = vga_video_num_lines; |
391 | } else |
392 | vc_resize(vc: c, cols: vga_video_num_columns, lines: vga_video_num_lines); |
393 | |
394 | c->vc_complement_mask = 0x7700; |
395 | if (vga_512_chars) |
396 | c->vc_hi_font_mask = 0x0800; |
397 | p = *c->uni_pagedict_loc; |
398 | if (c->uni_pagedict_loc != &vgacon_uni_pagedir) { |
399 | con_free_unimap(vc: c); |
400 | c->uni_pagedict_loc = &vgacon_uni_pagedir; |
401 | vgacon_refcount++; |
402 | } |
403 | if (!vgacon_uni_pagedir && p) |
404 | con_set_default_unimap(vc: c); |
405 | |
406 | /* Only set the default if the user didn't deliberately override it */ |
407 | if (global_cursor_default == -1) |
408 | global_cursor_default = |
409 | !(vga_si->flags & VIDEO_FLAGS_NOCURSOR); |
410 | } |
411 | |
412 | static void vgacon_deinit(struct vc_data *c) |
413 | { |
414 | /* When closing the active console, reset video origin */ |
415 | if (con_is_visible(vc: c)) { |
416 | c->vc_visible_origin = vga_vram_base; |
417 | vga_set_mem_top(c); |
418 | } |
419 | |
420 | if (!--vgacon_refcount) |
421 | con_free_unimap(vc: c); |
422 | c->uni_pagedict_loc = &c->uni_pagedict; |
423 | con_set_default_unimap(vc: c); |
424 | } |
425 | |
426 | static u8 vgacon_build_attr(struct vc_data *c, u8 color, |
427 | enum vc_intensity intensity, |
428 | bool blink, bool underline, bool reverse, |
429 | bool italic) |
430 | { |
431 | u8 attr = color; |
432 | |
433 | if (vga_can_do_color) { |
434 | if (italic) |
435 | attr = (attr & 0xF0) | c->vc_itcolor; |
436 | else if (underline) |
437 | attr = (attr & 0xf0) | c->vc_ulcolor; |
438 | else if (intensity == VCI_HALF_BRIGHT) |
439 | attr = (attr & 0xf0) | c->vc_halfcolor; |
440 | } |
441 | if (reverse) |
442 | attr = |
443 | ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) & |
444 | 0x77); |
445 | if (blink) |
446 | attr ^= 0x80; |
447 | if (intensity == VCI_BOLD) |
448 | attr ^= 0x08; |
449 | if (!vga_can_do_color) { |
450 | if (italic) |
451 | attr = (attr & 0xF8) | 0x02; |
452 | else if (underline) |
453 | attr = (attr & 0xf8) | 0x01; |
454 | else if (intensity == VCI_HALF_BRIGHT) |
455 | attr = (attr & 0xf0) | 0x08; |
456 | } |
457 | return attr; |
458 | } |
459 | |
460 | static void vgacon_invert_region(struct vc_data *c, u16 * p, int count) |
461 | { |
462 | const bool col = vga_can_do_color; |
463 | |
464 | while (count--) { |
465 | u16 a = scr_readw(p); |
466 | if (col) |
467 | a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | |
468 | (((a) & 0x0700) << 4); |
469 | else |
470 | a ^= ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; |
471 | scr_writew(a, p++); |
472 | } |
473 | } |
474 | |
475 | static void vgacon_set_cursor_size(int from, int to) |
476 | { |
477 | unsigned long flags; |
478 | int curs, cure; |
479 | |
480 | if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto)) |
481 | return; |
482 | cursor_size_lastfrom = from; |
483 | cursor_size_lastto = to; |
484 | |
485 | raw_spin_lock_irqsave(&vga_lock, flags); |
486 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
487 | outb_p(VGA_CRTC_CURSOR_START, port: vga_video_port_reg); |
488 | curs = inb_p(port: vga_video_port_val); |
489 | outb_p(VGA_CRTC_CURSOR_END, port: vga_video_port_reg); |
490 | cure = inb_p(port: vga_video_port_val); |
491 | } else { |
492 | curs = 0; |
493 | cure = 0; |
494 | } |
495 | |
496 | curs = (curs & 0xc0) | from; |
497 | cure = (cure & 0xe0) | to; |
498 | |
499 | outb_p(VGA_CRTC_CURSOR_START, port: vga_video_port_reg); |
500 | outb_p(value: curs, port: vga_video_port_val); |
501 | outb_p(VGA_CRTC_CURSOR_END, port: vga_video_port_reg); |
502 | outb_p(value: cure, port: vga_video_port_val); |
503 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
504 | } |
505 | |
506 | static void vgacon_cursor(struct vc_data *c, bool enable) |
507 | { |
508 | unsigned int c_height; |
509 | |
510 | if (c->vc_mode != KD_TEXT) |
511 | return; |
512 | |
513 | vgacon_restore_screen(c); |
514 | |
515 | c_height = c->vc_cell_height; |
516 | |
517 | write_vga(reg: 14, val: (c->vc_pos - vga_vram_base) / 2); |
518 | |
519 | if (!enable) { |
520 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
521 | vgacon_set_cursor_size(from: 31, to: 30); |
522 | else |
523 | vgacon_set_cursor_size(from: 31, to: 31); |
524 | return; |
525 | } |
526 | |
527 | switch (CUR_SIZE(c->vc_cursor_type)) { |
528 | case CUR_UNDERLINE: |
529 | vgacon_set_cursor_size(from: c_height - (c_height < 10 ? 2 : 3), |
530 | to: c_height - (c_height < 10 ? 1 : 2)); |
531 | break; |
532 | case CUR_TWO_THIRDS: |
533 | vgacon_set_cursor_size(from: c_height / 3, |
534 | to: c_height - (c_height < 10 ? 1 : 2)); |
535 | break; |
536 | case CUR_LOWER_THIRD: |
537 | vgacon_set_cursor_size(from: c_height * 2 / 3, |
538 | to: c_height - (c_height < 10 ? 1 : 2)); |
539 | break; |
540 | case CUR_LOWER_HALF: |
541 | vgacon_set_cursor_size(from: c_height / 2, |
542 | to: c_height - (c_height < 10 ? 1 : 2)); |
543 | break; |
544 | case CUR_NONE: |
545 | if (vga_video_type >= VIDEO_TYPE_VGAC) |
546 | vgacon_set_cursor_size(from: 31, to: 30); |
547 | else |
548 | vgacon_set_cursor_size(from: 31, to: 31); |
549 | break; |
550 | default: |
551 | vgacon_set_cursor_size(from: 1, to: c_height); |
552 | break; |
553 | } |
554 | } |
555 | |
556 | static void vgacon_doresize(struct vc_data *c, |
557 | unsigned int width, unsigned int height) |
558 | { |
559 | unsigned long flags; |
560 | unsigned int scanlines = height * c->vc_cell_height; |
561 | u8 scanlines_lo = 0, r7 = 0, vsync_end = 0, mode, max_scan; |
562 | |
563 | raw_spin_lock_irqsave(&vga_lock, flags); |
564 | |
565 | vgacon_xres = width * VGA_FONTWIDTH; |
566 | vgacon_yres = height * c->vc_cell_height; |
567 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
568 | outb_p(VGA_CRTC_MAX_SCAN, port: vga_video_port_reg); |
569 | max_scan = inb_p(port: vga_video_port_val); |
570 | |
571 | if (max_scan & 0x80) |
572 | scanlines <<= 1; |
573 | |
574 | outb_p(VGA_CRTC_MODE, port: vga_video_port_reg); |
575 | mode = inb_p(port: vga_video_port_val); |
576 | |
577 | if (mode & 0x04) |
578 | scanlines >>= 1; |
579 | |
580 | scanlines -= 1; |
581 | scanlines_lo = scanlines & 0xff; |
582 | |
583 | outb_p(VGA_CRTC_OVERFLOW, port: vga_video_port_reg); |
584 | r7 = inb_p(port: vga_video_port_val) & ~0x42; |
585 | |
586 | if (scanlines & 0x100) |
587 | r7 |= 0x02; |
588 | if (scanlines & 0x200) |
589 | r7 |= 0x40; |
590 | |
591 | /* deprotect registers */ |
592 | outb_p(VGA_CRTC_V_SYNC_END, port: vga_video_port_reg); |
593 | vsync_end = inb_p(port: vga_video_port_val); |
594 | outb_p(VGA_CRTC_V_SYNC_END, port: vga_video_port_reg); |
595 | outb_p(value: vsync_end & ~0x80, port: vga_video_port_val); |
596 | } |
597 | |
598 | outb_p(VGA_CRTC_H_DISP, port: vga_video_port_reg); |
599 | outb_p(value: width - 1, port: vga_video_port_val); |
600 | outb_p(VGA_CRTC_OFFSET, port: vga_video_port_reg); |
601 | outb_p(value: width >> 1, port: vga_video_port_val); |
602 | |
603 | if (vga_video_type >= VIDEO_TYPE_VGAC) { |
604 | outb_p(VGA_CRTC_V_DISP_END, port: vga_video_port_reg); |
605 | outb_p(value: scanlines_lo, port: vga_video_port_val); |
606 | outb_p(VGA_CRTC_OVERFLOW, port: vga_video_port_reg); |
607 | outb_p(value: r7,port: vga_video_port_val); |
608 | |
609 | /* reprotect registers */ |
610 | outb_p(VGA_CRTC_V_SYNC_END, port: vga_video_port_reg); |
611 | outb_p(value: vsync_end, port: vga_video_port_val); |
612 | } |
613 | |
614 | raw_spin_unlock_irqrestore(&vga_lock, flags); |
615 | } |
616 | |
617 | static bool vgacon_switch(struct vc_data *c) |
618 | { |
619 | int x = c->vc_cols * VGA_FONTWIDTH; |
620 | int y = c->vc_rows * c->vc_cell_height; |
621 | int rows = vga_si->orig_video_lines * vga_default_font_height/ |
622 | c->vc_cell_height; |
623 | /* |
624 | * We need to save screen size here as it's the only way |
625 | * we can spot the screen has been resized and we need to |
626 | * set size of freshly allocated screens ourselves. |
627 | */ |
628 | vga_video_num_columns = c->vc_cols; |
629 | vga_video_num_lines = c->vc_rows; |
630 | |
631 | /* We can only copy out the size of the video buffer here, |
632 | * otherwise we get into VGA BIOS */ |
633 | |
634 | if (!vga_is_gfx) { |
635 | scr_memcpyw(d: (u16 *) c->vc_origin, s: (u16 *) c->vc_screenbuf, |
636 | count: c->vc_screenbuf_size > vga_vram_size ? |
637 | vga_vram_size : c->vc_screenbuf_size); |
638 | |
639 | if ((vgacon_xres != x || vgacon_yres != y) && |
640 | (!(vga_video_num_columns % 2) && |
641 | vga_video_num_columns <= vga_si->orig_video_cols && |
642 | vga_video_num_lines <= rows)) |
643 | vgacon_doresize(c, width: c->vc_cols, height: c->vc_rows); |
644 | } |
645 | |
646 | return false; /* Redrawing not needed */ |
647 | } |
648 | |
649 | static void vga_set_palette(struct vc_data *vc, const unsigned char *table) |
650 | { |
651 | int i, j; |
652 | |
653 | vga_w(regbase: vgastate.vgabase, VGA_PEL_MSK, val: 0xff); |
654 | for (i = j = 0; i < 16; i++) { |
655 | vga_w(regbase: vgastate.vgabase, VGA_PEL_IW, val: table[i]); |
656 | vga_w(regbase: vgastate.vgabase, VGA_PEL_D, val: vc->vc_palette[j++] >> 2); |
657 | vga_w(regbase: vgastate.vgabase, VGA_PEL_D, val: vc->vc_palette[j++] >> 2); |
658 | vga_w(regbase: vgastate.vgabase, VGA_PEL_D, val: vc->vc_palette[j++] >> 2); |
659 | } |
660 | } |
661 | |
662 | static void vgacon_set_palette(struct vc_data *vc, const unsigned char *table) |
663 | { |
664 | if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked |
665 | || !con_is_visible(vc)) |
666 | return; |
667 | vga_set_palette(vc, table); |
668 | } |
669 | |
670 | /* structure holding original VGA register settings */ |
671 | static struct { |
672 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ |
673 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ |
674 | unsigned char CrtMiscIO; /* Miscellaneous register */ |
675 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ |
676 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ |
677 | unsigned char StartHorizRetrace; /* CRT-Controller:04h */ |
678 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ |
679 | unsigned char Overflow; /* CRT-Controller:07h */ |
680 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ |
681 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ |
682 | unsigned char ModeControl; /* CRT-Controller:17h */ |
683 | unsigned char ClockingMode; /* Seq-Controller:01h */ |
684 | } vga_state; |
685 | |
686 | static void vga_vesa_blank(struct vgastate *state, enum vesa_blank_mode mode) |
687 | { |
688 | /* save original values of VGA controller registers */ |
689 | if (!vga_vesa_blanked) { |
690 | raw_spin_lock_irq(&vga_lock); |
691 | vga_state.SeqCtrlIndex = vga_r(regbase: state->vgabase, VGA_SEQ_I); |
692 | vga_state.CrtCtrlIndex = inb_p(port: vga_video_port_reg); |
693 | vga_state.CrtMiscIO = vga_r(regbase: state->vgabase, VGA_MIS_R); |
694 | raw_spin_unlock_irq(&vga_lock); |
695 | |
696 | outb_p(value: 0x00, port: vga_video_port_reg); /* HorizontalTotal */ |
697 | vga_state.HorizontalTotal = inb_p(port: vga_video_port_val); |
698 | outb_p(value: 0x01, port: vga_video_port_reg); /* HorizDisplayEnd */ |
699 | vga_state.HorizDisplayEnd = inb_p(port: vga_video_port_val); |
700 | outb_p(value: 0x04, port: vga_video_port_reg); /* StartHorizRetrace */ |
701 | vga_state.StartHorizRetrace = inb_p(port: vga_video_port_val); |
702 | outb_p(value: 0x05, port: vga_video_port_reg); /* EndHorizRetrace */ |
703 | vga_state.EndHorizRetrace = inb_p(port: vga_video_port_val); |
704 | outb_p(value: 0x07, port: vga_video_port_reg); /* Overflow */ |
705 | vga_state.Overflow = inb_p(port: vga_video_port_val); |
706 | outb_p(value: 0x10, port: vga_video_port_reg); /* StartVertRetrace */ |
707 | vga_state.StartVertRetrace = inb_p(port: vga_video_port_val); |
708 | outb_p(value: 0x11, port: vga_video_port_reg); /* EndVertRetrace */ |
709 | vga_state.EndVertRetrace = inb_p(port: vga_video_port_val); |
710 | outb_p(value: 0x17, port: vga_video_port_reg); /* ModeControl */ |
711 | vga_state.ModeControl = inb_p(port: vga_video_port_val); |
712 | vga_state.ClockingMode = vga_rseq(regbase: state->vgabase, VGA_SEQ_CLOCK_MODE); |
713 | } |
714 | |
715 | /* assure that video is enabled */ |
716 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ |
717 | raw_spin_lock_irq(&vga_lock); |
718 | vga_wseq(regbase: state->vgabase, VGA_SEQ_CLOCK_MODE, val: vga_state.ClockingMode | 0x20); |
719 | |
720 | /* test for vertical retrace in process.... */ |
721 | if ((vga_state.CrtMiscIO & 0x80) == 0x80) |
722 | vga_w(regbase: state->vgabase, VGA_MIS_W, val: vga_state.CrtMiscIO & 0xEF); |
723 | |
724 | /* |
725 | * Set <End of vertical retrace> to minimum (0) and |
726 | * <Start of vertical Retrace> to maximum (incl. overflow) |
727 | * Result: turn off vertical sync (VSync) pulse. |
728 | */ |
729 | if (mode & VESA_VSYNC_SUSPEND) { |
730 | outb_p(value: 0x10, port: vga_video_port_reg); /* StartVertRetrace */ |
731 | outb_p(value: 0xff, port: vga_video_port_val); /* maximum value */ |
732 | outb_p(value: 0x11, port: vga_video_port_reg); /* EndVertRetrace */ |
733 | outb_p(value: 0x40, port: vga_video_port_val); /* minimum (bits 0..3) */ |
734 | outb_p(value: 0x07, port: vga_video_port_reg); /* Overflow */ |
735 | outb_p(value: vga_state.Overflow | 0x84, port: vga_video_port_val); /* bits 9,10 of vert. retrace */ |
736 | } |
737 | |
738 | if (mode & VESA_HSYNC_SUSPEND) { |
739 | /* |
740 | * Set <End of horizontal retrace> to minimum (0) and |
741 | * <Start of horizontal Retrace> to maximum |
742 | * Result: turn off horizontal sync (HSync) pulse. |
743 | */ |
744 | outb_p(value: 0x04, port: vga_video_port_reg); /* StartHorizRetrace */ |
745 | outb_p(value: 0xff, port: vga_video_port_val); /* maximum */ |
746 | outb_p(value: 0x05, port: vga_video_port_reg); /* EndHorizRetrace */ |
747 | outb_p(value: 0x00, port: vga_video_port_val); /* minimum (0) */ |
748 | } |
749 | |
750 | /* restore both index registers */ |
751 | vga_w(regbase: state->vgabase, VGA_SEQ_I, val: vga_state.SeqCtrlIndex); |
752 | outb_p(value: vga_state.CrtCtrlIndex, port: vga_video_port_reg); |
753 | raw_spin_unlock_irq(&vga_lock); |
754 | } |
755 | |
756 | static void vga_vesa_unblank(struct vgastate *state) |
757 | { |
758 | /* restore original values of VGA controller registers */ |
759 | raw_spin_lock_irq(&vga_lock); |
760 | vga_w(regbase: state->vgabase, VGA_MIS_W, val: vga_state.CrtMiscIO); |
761 | |
762 | outb_p(value: 0x00, port: vga_video_port_reg); /* HorizontalTotal */ |
763 | outb_p(value: vga_state.HorizontalTotal, port: vga_video_port_val); |
764 | outb_p(value: 0x01, port: vga_video_port_reg); /* HorizDisplayEnd */ |
765 | outb_p(value: vga_state.HorizDisplayEnd, port: vga_video_port_val); |
766 | outb_p(value: 0x04, port: vga_video_port_reg); /* StartHorizRetrace */ |
767 | outb_p(value: vga_state.StartHorizRetrace, port: vga_video_port_val); |
768 | outb_p(value: 0x05, port: vga_video_port_reg); /* EndHorizRetrace */ |
769 | outb_p(value: vga_state.EndHorizRetrace, port: vga_video_port_val); |
770 | outb_p(value: 0x07, port: vga_video_port_reg); /* Overflow */ |
771 | outb_p(value: vga_state.Overflow, port: vga_video_port_val); |
772 | outb_p(value: 0x10, port: vga_video_port_reg); /* StartVertRetrace */ |
773 | outb_p(value: vga_state.StartVertRetrace, port: vga_video_port_val); |
774 | outb_p(value: 0x11, port: vga_video_port_reg); /* EndVertRetrace */ |
775 | outb_p(value: vga_state.EndVertRetrace, port: vga_video_port_val); |
776 | outb_p(value: 0x17, port: vga_video_port_reg); /* ModeControl */ |
777 | outb_p(value: vga_state.ModeControl, port: vga_video_port_val); |
778 | /* ClockingMode */ |
779 | vga_wseq(regbase: state->vgabase, VGA_SEQ_CLOCK_MODE, val: vga_state.ClockingMode); |
780 | |
781 | /* restore index/control registers */ |
782 | vga_w(regbase: state->vgabase, VGA_SEQ_I, val: vga_state.SeqCtrlIndex); |
783 | outb_p(value: vga_state.CrtCtrlIndex, port: vga_video_port_reg); |
784 | raw_spin_unlock_irq(&vga_lock); |
785 | } |
786 | |
787 | static void vga_pal_blank(struct vgastate *state) |
788 | { |
789 | int i; |
790 | |
791 | vga_w(regbase: state->vgabase, VGA_PEL_MSK, val: 0xff); |
792 | for (i = 0; i < 16; i++) { |
793 | vga_w(regbase: state->vgabase, VGA_PEL_IW, val: i); |
794 | vga_w(regbase: state->vgabase, VGA_PEL_D, val: 0); |
795 | vga_w(regbase: state->vgabase, VGA_PEL_D, val: 0); |
796 | vga_w(regbase: state->vgabase, VGA_PEL_D, val: 0); |
797 | } |
798 | } |
799 | |
800 | static bool vgacon_blank(struct vc_data *c, enum vesa_blank_mode blank, |
801 | bool mode_switch) |
802 | { |
803 | switch (blank) { |
804 | case VESA_NO_BLANKING: /* Unblank */ |
805 | if (vga_vesa_blanked) { |
806 | vga_vesa_unblank(state: &vgastate); |
807 | vga_vesa_blanked = VESA_NO_BLANKING; |
808 | } |
809 | if (vga_palette_blanked) { |
810 | vga_set_palette(vc: c, table: color_table); |
811 | vga_palette_blanked = false; |
812 | return 0; |
813 | } |
814 | vga_is_gfx = false; |
815 | /* Tell console.c that it has to restore the screen itself */ |
816 | return 1; |
817 | case VESA_VSYNC_SUSPEND: /* Normal blanking */ |
818 | if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) { |
819 | vga_pal_blank(state: &vgastate); |
820 | vga_palette_blanked = true; |
821 | return 0; |
822 | } |
823 | vgacon_set_origin(c); |
824 | scr_memsetw(s: (void *) vga_vram_base, BLANK, |
825 | count: c->vc_screenbuf_size); |
826 | if (mode_switch) |
827 | vga_is_gfx = true; |
828 | return 1; |
829 | default: /* VESA blanking */ |
830 | if (vga_video_type == VIDEO_TYPE_VGAC) { |
831 | vga_vesa_blank(state: &vgastate, mode: blank - 1); |
832 | vga_vesa_blanked = blank; |
833 | } |
834 | return 0; |
835 | } |
836 | } |
837 | |
838 | /* |
839 | * PIO_FONT support. |
840 | * |
841 | * The font loading code goes back to the codepage package by |
842 | * Joel Hoffman (joel@wam.umd.edu). (He reports that the original |
843 | * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2 |
844 | * Video Systems_ by Richard Wilton. 1987. Microsoft Press".) |
845 | * |
846 | * Change for certain monochrome monitors by Yury Shevchuck |
847 | * (sizif@botik.yaroslavl.su). |
848 | */ |
849 | |
850 | #define colourmap 0xa0000 |
851 | /* Pauline Middelink <middelin@polyware.iaf.nl> reports that we |
852 | should use 0xA0000 for the bwmap as well.. */ |
853 | #define blackwmap 0xa0000 |
854 | #define cmapsz 8192 |
855 | |
856 | static int vgacon_do_font_op(struct vgastate *state, char *arg, int set, |
857 | bool ch512) |
858 | { |
859 | unsigned short video_port_status = vga_video_port_reg + 6; |
860 | int font_select = 0x00, beg, i; |
861 | char *charmap; |
862 | bool clear_attribs = false; |
863 | if (vga_video_type != VIDEO_TYPE_EGAM) { |
864 | charmap = (char *) VGA_MAP_MEM(colourmap, 0); |
865 | beg = 0x0e; |
866 | } else { |
867 | charmap = (char *) VGA_MAP_MEM(blackwmap, 0); |
868 | beg = 0x0a; |
869 | } |
870 | |
871 | /* |
872 | * All fonts are loaded in slot 0 (0:1 for 512 ch) |
873 | */ |
874 | |
875 | if (!arg) |
876 | return -EINVAL; /* Return to default font not supported */ |
877 | |
878 | font_select = ch512 ? 0x04 : 0x00; |
879 | |
880 | raw_spin_lock_irq(&vga_lock); |
881 | /* First, the Sequencer */ |
882 | vga_wseq(regbase: state->vgabase, VGA_SEQ_RESET, val: 0x1); |
883 | /* CPU writes only to map 2 */ |
884 | vga_wseq(regbase: state->vgabase, VGA_SEQ_PLANE_WRITE, val: 0x04); |
885 | /* Sequential addressing */ |
886 | vga_wseq(regbase: state->vgabase, VGA_SEQ_MEMORY_MODE, val: 0x07); |
887 | /* Clear synchronous reset */ |
888 | vga_wseq(regbase: state->vgabase, VGA_SEQ_RESET, val: 0x03); |
889 | |
890 | /* Now, the graphics controller, select map 2 */ |
891 | vga_wgfx(regbase: state->vgabase, VGA_GFX_PLANE_READ, val: 0x02); |
892 | /* disable odd-even addressing */ |
893 | vga_wgfx(regbase: state->vgabase, VGA_GFX_MODE, val: 0x00); |
894 | /* map start at A000:0000 */ |
895 | vga_wgfx(regbase: state->vgabase, VGA_GFX_MISC, val: 0x00); |
896 | raw_spin_unlock_irq(&vga_lock); |
897 | |
898 | if (arg) { |
899 | if (set) |
900 | for (i = 0; i < cmapsz; i++) { |
901 | vga_writeb(arg[i], charmap + i); |
902 | cond_resched(); |
903 | } |
904 | else |
905 | for (i = 0; i < cmapsz; i++) { |
906 | arg[i] = vga_readb(charmap + i); |
907 | cond_resched(); |
908 | } |
909 | |
910 | /* |
911 | * In 512-character mode, the character map is not contiguous if |
912 | * we want to remain EGA compatible -- which we do |
913 | */ |
914 | |
915 | if (ch512) { |
916 | charmap += 2 * cmapsz; |
917 | arg += cmapsz; |
918 | if (set) |
919 | for (i = 0; i < cmapsz; i++) { |
920 | vga_writeb(arg[i], charmap + i); |
921 | cond_resched(); |
922 | } |
923 | else |
924 | for (i = 0; i < cmapsz; i++) { |
925 | arg[i] = vga_readb(charmap + i); |
926 | cond_resched(); |
927 | } |
928 | } |
929 | } |
930 | |
931 | raw_spin_lock_irq(&vga_lock); |
932 | /* First, the sequencer, Synchronous reset */ |
933 | vga_wseq(regbase: state->vgabase, VGA_SEQ_RESET, val: 0x01); |
934 | /* CPU writes to maps 0 and 1 */ |
935 | vga_wseq(regbase: state->vgabase, VGA_SEQ_PLANE_WRITE, val: 0x03); |
936 | /* odd-even addressing */ |
937 | vga_wseq(regbase: state->vgabase, VGA_SEQ_MEMORY_MODE, val: 0x03); |
938 | /* Character Map Select */ |
939 | if (set) |
940 | vga_wseq(regbase: state->vgabase, VGA_SEQ_CHARACTER_MAP, val: font_select); |
941 | /* clear synchronous reset */ |
942 | vga_wseq(regbase: state->vgabase, VGA_SEQ_RESET, val: 0x03); |
943 | |
944 | /* Now, the graphics controller, select map 0 for CPU */ |
945 | vga_wgfx(regbase: state->vgabase, VGA_GFX_PLANE_READ, val: 0x00); |
946 | /* enable even-odd addressing */ |
947 | vga_wgfx(regbase: state->vgabase, VGA_GFX_MODE, val: 0x10); |
948 | /* map starts at b800:0 or b000:0 */ |
949 | vga_wgfx(regbase: state->vgabase, VGA_GFX_MISC, val: beg); |
950 | |
951 | /* if 512 char mode is already enabled don't re-enable it. */ |
952 | if ((set) && (ch512 != vga_512_chars)) { |
953 | vga_512_chars = ch512; |
954 | /* 256-char: enable intensity bit |
955 | 512-char: disable intensity bit */ |
956 | inb_p(port: video_port_status); /* clear address flip-flop */ |
957 | /* color plane enable register */ |
958 | vga_wattr(regbase: state->vgabase, VGA_ATC_PLANE_ENABLE, val: ch512 ? 0x07 : 0x0f); |
959 | /* Wilton (1987) mentions the following; I don't know what |
960 | it means, but it works, and it appears necessary */ |
961 | inb_p(port: video_port_status); |
962 | vga_wattr(regbase: state->vgabase, VGA_AR_ENABLE_DISPLAY, val: 0); |
963 | clear_attribs = true; |
964 | } |
965 | raw_spin_unlock_irq(&vga_lock); |
966 | |
967 | if (clear_attribs) { |
968 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
969 | struct vc_data *c = vc_cons[i].d; |
970 | if (c && c->vc_sw == &vga_con) { |
971 | /* force hi font mask to 0, so we always clear |
972 | the bit on either transition */ |
973 | c->vc_hi_font_mask = 0x00; |
974 | clear_buffer_attributes(vc: c); |
975 | c->vc_hi_font_mask = ch512 ? 0x0800 : 0; |
976 | } |
977 | } |
978 | } |
979 | return 0; |
980 | } |
981 | |
982 | /* |
983 | * Adjust the screen to fit a font of a certain height |
984 | */ |
985 | static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight) |
986 | { |
987 | unsigned char ovr, vde, fsr; |
988 | int rows, maxscan, i; |
989 | |
990 | rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */ |
991 | maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */ |
992 | |
993 | /* Reprogram the CRTC for the new font size |
994 | Note: the attempt to read the overflow register will fail |
995 | on an EGA, but using 0xff for the previous value appears to |
996 | be OK for EGA text modes in the range 257-512 scan lines, so I |
997 | guess we don't need to worry about it. |
998 | |
999 | The same applies for the spill bits in the font size and cursor |
1000 | registers; they are write-only on EGA, but it appears that they |
1001 | are all don't care bits on EGA, so I guess it doesn't matter. */ |
1002 | |
1003 | raw_spin_lock_irq(&vga_lock); |
1004 | outb_p(value: 0x07, port: vga_video_port_reg); /* CRTC overflow register */ |
1005 | ovr = inb_p(port: vga_video_port_val); |
1006 | outb_p(value: 0x09, port: vga_video_port_reg); /* Font size register */ |
1007 | fsr = inb_p(port: vga_video_port_val); |
1008 | raw_spin_unlock_irq(&vga_lock); |
1009 | |
1010 | vde = maxscan & 0xff; /* Vertical display end reg */ |
1011 | ovr = (ovr & 0xbd) + /* Overflow register */ |
1012 | ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3); |
1013 | fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */ |
1014 | |
1015 | raw_spin_lock_irq(&vga_lock); |
1016 | outb_p(value: 0x07, port: vga_video_port_reg); /* CRTC overflow register */ |
1017 | outb_p(value: ovr, port: vga_video_port_val); |
1018 | outb_p(value: 0x09, port: vga_video_port_reg); /* Font size */ |
1019 | outb_p(value: fsr, port: vga_video_port_val); |
1020 | outb_p(value: 0x12, port: vga_video_port_reg); /* Vertical display limit */ |
1021 | outb_p(value: vde, port: vga_video_port_val); |
1022 | raw_spin_unlock_irq(&vga_lock); |
1023 | vga_video_font_height = fontheight; |
1024 | |
1025 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
1026 | struct vc_data *c = vc_cons[i].d; |
1027 | |
1028 | if (c && c->vc_sw == &vga_con) { |
1029 | if (con_is_visible(vc: c)) { |
1030 | /* void size to cause regs to be rewritten */ |
1031 | cursor_size_lastfrom = 0; |
1032 | cursor_size_lastto = 0; |
1033 | c->vc_sw->con_cursor(c, true); |
1034 | } |
1035 | c->vc_font.height = c->vc_cell_height = fontheight; |
1036 | vc_resize(vc: c, cols: 0, lines: rows); /* Adjust console size */ |
1037 | } |
1038 | } |
1039 | return 0; |
1040 | } |
1041 | |
1042 | static int vgacon_font_set(struct vc_data *c, const struct console_font *font, |
1043 | unsigned int vpitch, unsigned int flags) |
1044 | { |
1045 | unsigned charcount = font->charcount; |
1046 | int rc; |
1047 | |
1048 | if (vga_video_type < VIDEO_TYPE_EGAM) |
1049 | return -EINVAL; |
1050 | |
1051 | if (font->width != VGA_FONTWIDTH || font->height > 32 || vpitch != 32 || |
1052 | (charcount != 256 && charcount != 512)) |
1053 | return -EINVAL; |
1054 | |
1055 | rc = vgacon_do_font_op(state: &vgastate, arg: font->data, set: 1, ch512: charcount == 512); |
1056 | if (rc) |
1057 | return rc; |
1058 | |
1059 | if (!(flags & KD_FONT_FLAG_DONT_RECALC)) |
1060 | rc = vgacon_adjust_height(vc: c, fontheight: font->height); |
1061 | return rc; |
1062 | } |
1063 | |
1064 | static int vgacon_font_get(struct vc_data *c, struct console_font *font, unsigned int vpitch) |
1065 | { |
1066 | if (vga_video_type < VIDEO_TYPE_EGAM || vpitch != 32) |
1067 | return -EINVAL; |
1068 | |
1069 | font->width = VGA_FONTWIDTH; |
1070 | font->height = c->vc_font.height; |
1071 | font->charcount = vga_512_chars ? 512 : 256; |
1072 | if (!font->data) |
1073 | return 0; |
1074 | return vgacon_do_font_op(state: &vgastate, arg: font->data, set: 0, ch512: vga_512_chars); |
1075 | } |
1076 | |
1077 | static int vgacon_resize(struct vc_data *c, unsigned int width, |
1078 | unsigned int height, bool from_user) |
1079 | { |
1080 | if ((width << 1) * height > vga_vram_size) |
1081 | return -EINVAL; |
1082 | |
1083 | if (from_user) { |
1084 | /* |
1085 | * Ho ho! Someone (svgatextmode, eh?) may have reprogrammed |
1086 | * the video mode! Set the new defaults then and go away. |
1087 | */ |
1088 | vga_si->orig_video_cols = width; |
1089 | vga_si->orig_video_lines = height; |
1090 | vga_default_font_height = c->vc_cell_height; |
1091 | return 0; |
1092 | } |
1093 | if (width % 2 || width > vga_si->orig_video_cols || |
1094 | height > (vga_si->orig_video_lines * vga_default_font_height)/ |
1095 | c->vc_cell_height) |
1096 | return -EINVAL; |
1097 | |
1098 | if (con_is_visible(vc: c) && !vga_is_gfx) /* who knows */ |
1099 | vgacon_doresize(c, width, height); |
1100 | return 0; |
1101 | } |
1102 | |
1103 | static bool vgacon_set_origin(struct vc_data *c) |
1104 | { |
1105 | if (vga_is_gfx || /* We don't play origin tricks in graphic modes */ |
1106 | (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */ |
1107 | return false; |
1108 | c->vc_origin = c->vc_visible_origin = vga_vram_base; |
1109 | vga_set_mem_top(c); |
1110 | vga_rolled_over = 0; |
1111 | return true; |
1112 | } |
1113 | |
1114 | static void vgacon_save_screen(struct vc_data *c) |
1115 | { |
1116 | static int vga_bootup_console = 0; |
1117 | |
1118 | if (!vga_bootup_console) { |
1119 | /* This is a gross hack, but here is the only place we can |
1120 | * set bootup console parameters without messing up generic |
1121 | * console initialization routines. |
1122 | */ |
1123 | vga_bootup_console = 1; |
1124 | c->state.x = vga_si->orig_x; |
1125 | c->state.y = vga_si->orig_y; |
1126 | } |
1127 | |
1128 | /* We can't copy in more than the size of the video buffer, |
1129 | * or we'll be copying in VGA BIOS */ |
1130 | |
1131 | if (!vga_is_gfx) |
1132 | scr_memcpyw(d: (u16 *) c->vc_screenbuf, s: (u16 *) c->vc_origin, |
1133 | count: c->vc_screenbuf_size > vga_vram_size ? vga_vram_size : c->vc_screenbuf_size); |
1134 | } |
1135 | |
1136 | static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b, |
1137 | enum con_scroll dir, unsigned int lines) |
1138 | { |
1139 | unsigned long oldo; |
1140 | unsigned int delta; |
1141 | |
1142 | if (t || b != c->vc_rows || vga_is_gfx || c->vc_mode != KD_TEXT) |
1143 | return false; |
1144 | |
1145 | if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2) |
1146 | return false; |
1147 | |
1148 | vgacon_restore_screen(c); |
1149 | oldo = c->vc_origin; |
1150 | delta = lines * c->vc_size_row; |
1151 | if (dir == SM_UP) { |
1152 | if (c->vc_scr_end + delta >= vga_vram_end) { |
1153 | scr_memcpyw(d: (u16 *) vga_vram_base, |
1154 | s: (u16 *) (oldo + delta), |
1155 | count: c->vc_screenbuf_size - delta); |
1156 | c->vc_origin = vga_vram_base; |
1157 | vga_rolled_over = oldo - vga_vram_base; |
1158 | } else |
1159 | c->vc_origin += delta; |
1160 | scr_memsetw(s: (u16 *) (c->vc_origin + c->vc_screenbuf_size - |
1161 | delta), c: c->vc_video_erase_char, |
1162 | count: delta); |
1163 | } else { |
1164 | if (oldo - delta < vga_vram_base) { |
1165 | scr_memmovew(d: (u16 *) (vga_vram_end - |
1166 | c->vc_screenbuf_size + |
1167 | delta), s: (u16 *) oldo, |
1168 | count: c->vc_screenbuf_size - delta); |
1169 | c->vc_origin = vga_vram_end - c->vc_screenbuf_size; |
1170 | vga_rolled_over = 0; |
1171 | } else |
1172 | c->vc_origin -= delta; |
1173 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; |
1174 | scr_memsetw(s: (u16 *) (c->vc_origin), c: c->vc_video_erase_char, |
1175 | count: delta); |
1176 | } |
1177 | c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size; |
1178 | c->vc_visible_origin = c->vc_origin; |
1179 | vga_set_mem_top(c); |
1180 | c->vc_pos = (c->vc_pos - oldo) + c->vc_origin; |
1181 | return true; |
1182 | } |
1183 | |
1184 | /* |
1185 | * The console `switch' structure for the VGA based console |
1186 | */ |
1187 | |
1188 | static void vgacon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, |
1189 | unsigned int width) { } |
1190 | static void vgacon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, |
1191 | unsigned int ypos, unsigned int xpos) { } |
1192 | |
1193 | const struct consw vga_con = { |
1194 | .owner = THIS_MODULE, |
1195 | .con_startup = vgacon_startup, |
1196 | .con_init = vgacon_init, |
1197 | .con_deinit = vgacon_deinit, |
1198 | .con_clear = vgacon_clear, |
1199 | .con_putcs = vgacon_putcs, |
1200 | .con_cursor = vgacon_cursor, |
1201 | .con_scroll = vgacon_scroll, |
1202 | .con_switch = vgacon_switch, |
1203 | .con_blank = vgacon_blank, |
1204 | .con_font_set = vgacon_font_set, |
1205 | .con_font_get = vgacon_font_get, |
1206 | .con_resize = vgacon_resize, |
1207 | .con_set_palette = vgacon_set_palette, |
1208 | .con_scrolldelta = vgacon_scrolldelta, |
1209 | .con_set_origin = vgacon_set_origin, |
1210 | .con_save_screen = vgacon_save_screen, |
1211 | .con_build_attr = vgacon_build_attr, |
1212 | .con_invert_region = vgacon_invert_region, |
1213 | }; |
1214 | EXPORT_SYMBOL(vga_con); |
1215 | |
1216 | void vgacon_register_screen(struct screen_info *si) |
1217 | { |
1218 | if (!si || vga_si) |
1219 | return; |
1220 | |
1221 | conswitchp = &vga_con; |
1222 | vga_si = si; |
1223 | } |
1224 | |
1225 | MODULE_LICENSE("GPL" ); |
1226 | |