Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/vgastate.c -- VGA state save/restore | |
3 | * | |
4 | * Copyright 2002 James Simmons | |
5 | * | |
6 | * Copyright history from vga16fb.c: | |
7 | * Copyright 1999 Ben Pfaff and Petr Vandrovec | |
8 | * Based on VGA info at http://www.goodnet.com/~tinara/FreeVGA/home.htm | |
9 | * Based on VESA framebuffer (c) 1998 Gerd Knorr | |
10 | * | |
11 | * This file is subject to the terms and conditions of the GNU General | |
12 | * Public License. See the file COPYING in the main directory of this | |
13 | * archive for more details. | |
14 | * | |
15 | */ | |
16 | #include <linux/config.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/fb.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <video/vga.h> | |
22 | ||
23 | struct regstate { | |
24 | __u8 *vga_font0; | |
25 | __u8 *vga_font1; | |
26 | __u8 *vga_text; | |
27 | __u8 *vga_cmap; | |
28 | __u8 *attr; | |
29 | __u8 *crtc; | |
30 | __u8 *gfx; | |
31 | __u8 *seq; | |
32 | __u8 misc; | |
33 | }; | |
34 | ||
35 | static inline unsigned char vga_rcrtcs(void __iomem *regbase, unsigned short iobase, | |
36 | unsigned char reg) | |
37 | { | |
38 | vga_w(regbase, iobase + 0x4, reg); | |
39 | return vga_r(regbase, iobase + 0x5); | |
40 | } | |
41 | ||
42 | static inline void vga_wcrtcs(void __iomem *regbase, unsigned short iobase, | |
43 | unsigned char reg, unsigned char val) | |
44 | { | |
45 | vga_w(regbase, iobase + 0x4, reg); | |
46 | vga_w(regbase, iobase + 0x5, val); | |
47 | } | |
48 | ||
49 | static void save_vga_text(struct vgastate *state, void __iomem *fbbase) | |
50 | { | |
51 | struct regstate *saved = (struct regstate *) state->vidstate; | |
52 | int i; | |
53 | u8 misc, attr10, gr4, gr5, gr6, seq1, seq2, seq4; | |
54 | ||
55 | /* if in graphics mode, no need to save */ | |
56 | attr10 = vga_rattr(state->vgabase, 0x10); | |
57 | if (attr10 & 1) | |
58 | return; | |
59 | ||
60 | /* save regs */ | |
61 | misc = vga_r(state->vgabase, VGA_MIS_R); | |
62 | gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ); | |
63 | gr5 = vga_rgfx(state->vgabase, VGA_GFX_MODE); | |
64 | gr6 = vga_rgfx(state->vgabase, VGA_GFX_MISC); | |
65 | seq2 = vga_rseq(state->vgabase, VGA_SEQ_PLANE_WRITE); | |
66 | seq4 = vga_rseq(state->vgabase, VGA_SEQ_MEMORY_MODE); | |
67 | ||
68 | /* force graphics mode */ | |
69 | vga_w(state->vgabase, VGA_MIS_W, misc | 1); | |
70 | ||
71 | /* blank screen */ | |
72 | seq1 = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); | |
73 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
74 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 | 1 << 5); | |
75 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3); | |
76 | ||
77 | /* save font at plane 2 */ | |
78 | if (state->flags & VGA_SAVE_FONT0) { | |
79 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x4); | |
80 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
81 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2); | |
82 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
83 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
84 | for (i = 0; i < 4 * 8192; i++) | |
85 | saved->vga_font0[i] = vga_r(fbbase, i); | |
86 | } | |
87 | ||
88 | /* save font at plane 3 */ | |
89 | if (state->flags & VGA_SAVE_FONT1) { | |
90 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x8); | |
91 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
92 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3); | |
93 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
94 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
95 | for (i = 0; i < state->memsize; i++) | |
96 | saved->vga_font1[i] = vga_r(fbbase, i); | |
97 | } | |
98 | ||
99 | /* save font at plane 0/1 */ | |
100 | if (state->flags & VGA_SAVE_TEXT) { | |
101 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x1); | |
102 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
103 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0); | |
104 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
105 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
106 | for (i = 0; i < 8192; i++) | |
107 | saved->vga_text[i] = vga_r(fbbase, i); | |
108 | ||
109 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x2); | |
110 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
111 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1); | |
112 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
113 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
114 | for (i = 0; i < 8192; i++) | |
115 | saved->vga_text[8192+i] = vga_r(fbbase + 2 * 8192, i); | |
116 | } | |
117 | ||
118 | /* restore regs */ | |
119 | vga_wattr(state->vgabase, 0x10, attr10); | |
120 | ||
121 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, seq2); | |
122 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, seq4); | |
123 | ||
124 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4); | |
125 | vga_wgfx(state->vgabase, VGA_GFX_MODE, gr5); | |
126 | vga_wgfx(state->vgabase, VGA_GFX_MISC, gr6); | |
127 | vga_w(state->vgabase, VGA_MIS_W, misc); | |
128 | ||
129 | /* unblank screen */ | |
130 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
131 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 & ~(1 << 5)); | |
132 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3); | |
133 | ||
134 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1); | |
135 | } | |
136 | ||
137 | static void restore_vga_text(struct vgastate *state, void __iomem *fbbase) | |
138 | { | |
139 | struct regstate *saved = (struct regstate *) state->vidstate; | |
140 | int i; | |
141 | u8 misc, gr1, gr3, gr4, gr5, gr6, gr8; | |
142 | u8 seq1, seq2, seq4; | |
143 | ||
144 | /* save regs */ | |
145 | misc = vga_r(state->vgabase, VGA_MIS_R); | |
146 | gr1 = vga_rgfx(state->vgabase, VGA_GFX_SR_ENABLE); | |
147 | gr3 = vga_rgfx(state->vgabase, VGA_GFX_DATA_ROTATE); | |
148 | gr4 = vga_rgfx(state->vgabase, VGA_GFX_PLANE_READ); | |
149 | gr5 = vga_rgfx(state->vgabase, VGA_GFX_MODE); | |
150 | gr6 = vga_rgfx(state->vgabase, VGA_GFX_MISC); | |
151 | gr8 = vga_rgfx(state->vgabase, VGA_GFX_BIT_MASK); | |
152 | seq2 = vga_rseq(state->vgabase, VGA_SEQ_PLANE_WRITE); | |
153 | seq4 = vga_rseq(state->vgabase, VGA_SEQ_MEMORY_MODE); | |
154 | ||
155 | /* force graphics mode */ | |
156 | vga_w(state->vgabase, VGA_MIS_W, misc | 1); | |
157 | ||
158 | /* blank screen */ | |
159 | seq1 = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE); | |
160 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
161 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 | 1 << 5); | |
162 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3); | |
163 | ||
164 | if (state->depth == 4) { | |
165 | vga_wgfx(state->vgabase, VGA_GFX_DATA_ROTATE, 0x0); | |
166 | vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, 0xff); | |
167 | vga_wgfx(state->vgabase, VGA_GFX_SR_ENABLE, 0x00); | |
168 | } | |
169 | ||
170 | /* restore font at plane 2 */ | |
171 | if (state->flags & VGA_SAVE_FONT0) { | |
172 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x4); | |
173 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
174 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x2); | |
175 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
176 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
177 | for (i = 0; i < 4 * 8192; i++) | |
178 | vga_w(fbbase, i, saved->vga_font0[i]); | |
179 | } | |
180 | ||
181 | /* restore font at plane 3 */ | |
182 | if (state->flags & VGA_SAVE_FONT1) { | |
183 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x8); | |
184 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
185 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x3); | |
186 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
187 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
188 | for (i = 0; i < state->memsize; i++) | |
189 | vga_w(fbbase, i, saved->vga_font1[i]); | |
190 | } | |
191 | ||
192 | /* restore font at plane 0/1 */ | |
193 | if (state->flags & VGA_SAVE_TEXT) { | |
194 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x1); | |
195 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
196 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x0); | |
197 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
198 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
199 | for (i = 0; i < 8192; i++) | |
200 | vga_w(fbbase, i, saved->vga_text[i]); | |
201 | ||
202 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x2); | |
203 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x6); | |
204 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x1); | |
205 | vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x0); | |
206 | vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x5); | |
207 | for (i = 0; i < 8192; i++) | |
208 | vga_w(fbbase, i, saved->vga_text[8192+i]); | |
209 | } | |
210 | ||
211 | /* unblank screen */ | |
212 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1); | |
213 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1 & ~(1 << 5)); | |
214 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x3); | |
215 | ||
216 | /* restore regs */ | |
217 | vga_w(state->vgabase, VGA_MIS_W, misc); | |
218 | ||
219 | vga_wgfx(state->vgabase, VGA_GFX_SR_ENABLE, gr1); | |
220 | vga_wgfx(state->vgabase, VGA_GFX_DATA_ROTATE, gr3); | |
221 | vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, gr4); | |
222 | vga_wgfx(state->vgabase, VGA_GFX_MODE, gr5); | |
223 | vga_wgfx(state->vgabase, VGA_GFX_MISC, gr6); | |
224 | vga_wgfx(state->vgabase, VGA_GFX_BIT_MASK, gr8); | |
225 | ||
226 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, seq1); | |
227 | vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, seq2); | |
228 | vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, seq4); | |
229 | } | |
230 | ||
231 | static void save_vga_mode(struct vgastate *state) | |
232 | { | |
233 | struct regstate *saved = (struct regstate *) state->vidstate; | |
234 | unsigned short iobase; | |
235 | int i; | |
236 | ||
237 | saved->misc = vga_r(state->vgabase, VGA_MIS_R); | |
238 | if (saved->misc & 1) | |
239 | iobase = 0x3d0; | |
240 | else | |
241 | iobase = 0x3b0; | |
242 | ||
243 | for (i = 0; i < state->num_crtc; i++) | |
244 | saved->crtc[i] = vga_rcrtcs(state->vgabase, iobase, i); | |
245 | ||
246 | vga_r(state->vgabase, iobase + 0xa); | |
247 | vga_w(state->vgabase, VGA_ATT_W, 0x00); | |
248 | for (i = 0; i < state->num_attr; i++) { | |
249 | vga_r(state->vgabase, iobase + 0xa); | |
250 | saved->attr[i] = vga_rattr(state->vgabase, i); | |
251 | } | |
252 | vga_r(state->vgabase, iobase + 0xa); | |
253 | vga_w(state->vgabase, VGA_ATT_W, 0x20); | |
254 | ||
255 | for (i = 0; i < state->num_gfx; i++) | |
256 | saved->gfx[i] = vga_rgfx(state->vgabase, i); | |
257 | ||
258 | for (i = 0; i < state->num_seq; i++) | |
259 | saved->seq[i] = vga_rseq(state->vgabase, i); | |
260 | } | |
261 | ||
262 | static void restore_vga_mode(struct vgastate *state) | |
263 | { | |
264 | struct regstate *saved = (struct regstate *) state->vidstate; | |
265 | unsigned short iobase; | |
266 | int i; | |
267 | ||
268 | vga_w(state->vgabase, VGA_MIS_W, saved->misc); | |
269 | ||
270 | if (saved->misc & 1) | |
271 | iobase = 0x3d0; | |
272 | else | |
273 | iobase = 0x3b0; | |
274 | ||
275 | /* turn off display */ | |
276 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, | |
277 | saved->seq[VGA_SEQ_CLOCK_MODE] | 0x20); | |
278 | ||
279 | /* disable sequencer */ | |
280 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01); | |
281 | ||
282 | /* enable palette addressing */ | |
283 | vga_r(state->vgabase, iobase + 0xa); | |
284 | vga_w(state->vgabase, VGA_ATT_W, 0x00); | |
285 | ||
286 | for (i = 2; i < state->num_seq; i++) | |
287 | vga_wseq(state->vgabase, i, saved->seq[i]); | |
288 | ||
289 | ||
290 | /* unprotect vga regs */ | |
291 | vga_wcrtcs(state->vgabase, iobase, 17, saved->crtc[17] & ~0x80); | |
292 | for (i = 0; i < state->num_crtc; i++) | |
293 | vga_wcrtcs(state->vgabase, iobase, i, saved->crtc[i]); | |
294 | ||
295 | for (i = 0; i < state->num_gfx; i++) | |
296 | vga_wgfx(state->vgabase, i, saved->gfx[i]); | |
297 | ||
298 | for (i = 0; i < state->num_attr; i++) { | |
299 | vga_r(state->vgabase, iobase + 0xa); | |
300 | vga_wattr(state->vgabase, i, saved->attr[i]); | |
301 | } | |
302 | ||
303 | /* reenable sequencer */ | |
304 | vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03); | |
305 | /* turn display on */ | |
306 | vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, | |
307 | saved->seq[VGA_SEQ_CLOCK_MODE] & ~(1 << 5)); | |
308 | ||
309 | /* disable video/palette source */ | |
310 | vga_r(state->vgabase, iobase + 0xa); | |
311 | vga_w(state->vgabase, VGA_ATT_W, 0x20); | |
312 | } | |
313 | ||
314 | static void save_vga_cmap(struct vgastate *state) | |
315 | { | |
316 | struct regstate *saved = (struct regstate *) state->vidstate; | |
317 | int i; | |
318 | ||
319 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); | |
320 | ||
321 | /* assumes DAC is readable and writable */ | |
322 | vga_w(state->vgabase, VGA_PEL_IR, 0x00); | |
323 | for (i = 0; i < 768; i++) | |
324 | saved->vga_cmap[i] = vga_r(state->vgabase, VGA_PEL_D); | |
325 | } | |
326 | ||
327 | static void restore_vga_cmap(struct vgastate *state) | |
328 | { | |
329 | struct regstate *saved = (struct regstate *) state->vidstate; | |
330 | int i; | |
331 | ||
332 | vga_w(state->vgabase, VGA_PEL_MSK, 0xff); | |
333 | ||
334 | /* assumes DAC is readable and writable */ | |
335 | vga_w(state->vgabase, VGA_PEL_IW, 0x00); | |
336 | for (i = 0; i < 768; i++) | |
337 | vga_w(state->vgabase, VGA_PEL_D, saved->vga_cmap[i]); | |
338 | } | |
339 | ||
340 | static void vga_cleanup(struct vgastate *state) | |
341 | { | |
342 | if (state->vidstate != NULL) { | |
343 | struct regstate *saved = (struct regstate *) state->vidstate; | |
344 | ||
f9101210 JJ |
345 | vfree(saved->vga_font0); |
346 | vfree(saved->vga_font1); | |
347 | vfree(saved->vga_text); | |
348 | vfree(saved->vga_cmap); | |
349 | vfree(saved->attr); | |
1da177e4 LT |
350 | kfree(saved); |
351 | state->vidstate = NULL; | |
352 | } | |
353 | } | |
354 | ||
355 | int save_vga(struct vgastate *state) | |
356 | { | |
357 | struct regstate *saved; | |
358 | ||
def1eded AD |
359 | saved = kzalloc(sizeof(struct regstate), GFP_KERNEL); |
360 | ||
1da177e4 LT |
361 | if (saved == NULL) |
362 | return 1; | |
def1eded | 363 | |
1da177e4 LT |
364 | state->vidstate = (void *)saved; |
365 | ||
366 | if (state->flags & VGA_SAVE_CMAP) { | |
367 | saved->vga_cmap = vmalloc(768); | |
368 | if (!saved->vga_cmap) { | |
369 | vga_cleanup(state); | |
370 | return 1; | |
371 | } | |
372 | save_vga_cmap(state); | |
373 | } | |
374 | ||
375 | if (state->flags & VGA_SAVE_MODE) { | |
376 | int total; | |
377 | ||
378 | if (state->num_attr < 21) | |
379 | state->num_attr = 21; | |
380 | if (state->num_crtc < 25) | |
381 | state->num_crtc = 25; | |
382 | if (state->num_gfx < 9) | |
383 | state->num_gfx = 9; | |
384 | if (state->num_seq < 5) | |
385 | state->num_seq = 5; | |
386 | total = state->num_attr + state->num_crtc + | |
387 | state->num_gfx + state->num_seq; | |
388 | ||
389 | saved->attr = vmalloc(total); | |
390 | if (!saved->attr) { | |
391 | vga_cleanup(state); | |
392 | return 1; | |
393 | } | |
394 | saved->crtc = saved->attr + state->num_attr; | |
395 | saved->gfx = saved->crtc + state->num_crtc; | |
396 | saved->seq = saved->gfx + state->num_gfx; | |
397 | ||
398 | save_vga_mode(state); | |
399 | } | |
400 | ||
401 | if (state->flags & VGA_SAVE_FONTS) { | |
402 | void __iomem *fbbase; | |
403 | ||
404 | /* exit if window is less than 32K */ | |
405 | if (state->memsize && state->memsize < 4 * 8192) { | |
406 | vga_cleanup(state); | |
407 | return 1; | |
408 | } | |
409 | if (!state->memsize) | |
410 | state->memsize = 8 * 8192; | |
411 | ||
412 | if (!state->membase) | |
413 | state->membase = 0xA0000; | |
414 | ||
415 | fbbase = ioremap(state->membase, state->memsize); | |
416 | ||
417 | if (!fbbase) { | |
418 | vga_cleanup(state); | |
419 | return 1; | |
420 | } | |
421 | ||
422 | /* | |
423 | * save only first 32K used by vgacon | |
424 | */ | |
425 | if (state->flags & VGA_SAVE_FONT0) { | |
426 | saved->vga_font0 = vmalloc(4 * 8192); | |
427 | if (!saved->vga_font0) { | |
428 | iounmap(fbbase); | |
429 | vga_cleanup(state); | |
430 | return 1; | |
431 | } | |
432 | } | |
433 | /* | |
434 | * largely unused, but if required by the caller | |
435 | * we'll just save everything. | |
436 | */ | |
437 | if (state->flags & VGA_SAVE_FONT1) { | |
438 | saved->vga_font1 = vmalloc(state->memsize); | |
439 | if (!saved->vga_font1) { | |
440 | iounmap(fbbase); | |
441 | vga_cleanup(state); | |
442 | return 1; | |
443 | } | |
444 | } | |
445 | /* | |
446 | * Save 8K at plane0[0], and 8K at plane1[16K] | |
447 | */ | |
448 | if (state->flags & VGA_SAVE_TEXT) { | |
449 | saved->vga_text = vmalloc(8192 * 2); | |
450 | if (!saved->vga_text) { | |
451 | iounmap(fbbase); | |
452 | vga_cleanup(state); | |
453 | return 1; | |
454 | } | |
455 | } | |
456 | ||
457 | save_vga_text(state, fbbase); | |
458 | iounmap(fbbase); | |
459 | } | |
460 | return 0; | |
461 | } | |
462 | ||
463 | int restore_vga (struct vgastate *state) | |
464 | { | |
465 | if (state->vidstate == NULL) | |
466 | return 1; | |
467 | ||
468 | if (state->flags & VGA_SAVE_MODE) | |
469 | restore_vga_mode(state); | |
470 | ||
471 | if (state->flags & VGA_SAVE_FONTS) { | |
472 | void __iomem *fbbase = ioremap(state->membase, state->memsize); | |
473 | ||
474 | if (!fbbase) { | |
475 | vga_cleanup(state); | |
476 | return 1; | |
477 | } | |
478 | restore_vga_text(state, fbbase); | |
479 | iounmap(fbbase); | |
480 | } | |
481 | ||
482 | if (state->flags & VGA_SAVE_CMAP) | |
483 | restore_vga_cmap(state); | |
484 | ||
485 | vga_cleanup(state); | |
486 | return 0; | |
487 | } | |
488 | ||
1da177e4 LT |
489 | EXPORT_SYMBOL(save_vga); |
490 | EXPORT_SYMBOL(restore_vga); | |
491 | ||
492 | MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>"); | |
493 | MODULE_DESCRIPTION("VGA State Save/Restore"); | |
494 | MODULE_LICENSE("GPL"); | |
495 |