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