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ieee802154: verify packet size before trying to allocate it
[linux/fpc-iii.git] / drivers / video / sis / sis_accel.c
blobceb434c95c0d56b166a7c6a1b9ee19de7ca4cda8
1 /*
2 * SiS 300/540/630[S]/730[S],
3 * SiS 315[E|PRO]/550/[M]650/651/[M]661[F|M]X/740/[M]741[GX]/330/[M]760[GX],
4 * XGI V3XT/V5/V8, Z7
5 * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
6 *
7 * 2D acceleration part
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the named License,
12 * or any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
22 *
23 * Based on the XFree86/X.org driver which is
24 * Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
25 *
26 * Author: Thomas Winischhofer <thomas@winischhofer.net>
27 * (see http://www.winischhofer.net/
28 * for more information and updates)
29 */
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/fb.h>
34 #include <linux/ioport.h>
35 #include <linux/types.h>
36 #include <asm/io.h>
37
38 #include "sis.h"
39 #include "sis_accel.h"
40
41 static const u8 sisALUConv[] =
42 {
43 0x00, /* dest = 0; 0, GXclear, 0 */
44 0x88, /* dest &= src; DSa, GXand, 0x1 */
45 0x44, /* dest = src & ~dest; SDna, GXandReverse, 0x2 */
46 0xCC, /* dest = src; S, GXcopy, 0x3 */
47 0x22, /* dest &= ~src; DSna, GXandInverted, 0x4 */
48 0xAA, /* dest = dest; D, GXnoop, 0x5 */
49 0x66, /* dest = ^src; DSx, GXxor, 0x6 */
50 0xEE, /* dest |= src; DSo, GXor, 0x7 */
51 0x11, /* dest = ~src & ~dest; DSon, GXnor, 0x8 */
52 0x99, /* dest ^= ~src ; DSxn, GXequiv, 0x9 */
53 0x55, /* dest = ~dest; Dn, GXInvert, 0xA */
54 0xDD, /* dest = src|~dest ; SDno, GXorReverse, 0xB */
55 0x33, /* dest = ~src; Sn, GXcopyInverted, 0xC */
56 0xBB, /* dest |= ~src; DSno, GXorInverted, 0xD */
57 0x77, /* dest = ~src|~dest; DSan, GXnand, 0xE */
58 0xFF, /* dest = 0xFF; 1, GXset, 0xF */
59 };
60 /* same ROP but with Pattern as Source */
61 static const u8 sisPatALUConv[] =
62 {
63 0x00, /* dest = 0; 0, GXclear, 0 */
64 0xA0, /* dest &= src; DPa, GXand, 0x1 */
65 0x50, /* dest = src & ~dest; PDna, GXandReverse, 0x2 */
66 0xF0, /* dest = src; P, GXcopy, 0x3 */
67 0x0A, /* dest &= ~src; DPna, GXandInverted, 0x4 */
68 0xAA, /* dest = dest; D, GXnoop, 0x5 */
69 0x5A, /* dest = ^src; DPx, GXxor, 0x6 */
70 0xFA, /* dest |= src; DPo, GXor, 0x7 */
71 0x05, /* dest = ~src & ~dest; DPon, GXnor, 0x8 */
72 0xA5, /* dest ^= ~src ; DPxn, GXequiv, 0x9 */
73 0x55, /* dest = ~dest; Dn, GXInvert, 0xA */
74 0xF5, /* dest = src|~dest ; PDno, GXorReverse, 0xB */
75 0x0F, /* dest = ~src; Pn, GXcopyInverted, 0xC */
76 0xAF, /* dest |= ~src; DPno, GXorInverted, 0xD */
77 0x5F, /* dest = ~src|~dest; DPan, GXnand, 0xE */
78 0xFF, /* dest = 0xFF; 1, GXset, 0xF */
79 };
80
81 static const int myrops[] = {
82 3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
83 };
84
85 /* 300 series ----------------------------------------------------- */
86 #ifdef CONFIG_FB_SIS_300
87 static void
88 SiS300Sync(struct sis_video_info *ivideo)
89 {
90 SiS300Idle
91 }
92
93 static void
94 SiS300SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int xdir, int ydir,
95 int rop, int trans_color)
96 {
97 SiS300SetupDSTColorDepth(ivideo->DstColor);
98 SiS300SetupSRCPitch(ivideo->video_linelength)
99 SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
100
101 if(trans_color != -1) {
102 SiS300SetupROP(0x0A)
103 SiS300SetupSRCTrans(trans_color)
104 SiS300SetupCMDFlag(TRANSPARENT_BITBLT)
105 } else {
106 SiS300SetupROP(sisALUConv[rop])
107 }
108 if(xdir > 0) {
109 SiS300SetupCMDFlag(X_INC)
110 }
111 if(ydir > 0) {
112 SiS300SetupCMDFlag(Y_INC)
113 }
114 }
115
116 static void
117 SiS300SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x,
118 int src_y, int dst_x, int dst_y, int width, int height)
119 {
120 u32 srcbase = 0, dstbase = 0;
121
122 if(src_y >= 2048) {
123 srcbase = ivideo->video_linelength * src_y;
124 src_y = 0;
125 }
126 if(dst_y >= 2048) {
127 dstbase = ivideo->video_linelength * dst_y;
128 dst_y = 0;
129 }
130
131 SiS300SetupSRCBase(srcbase);
132 SiS300SetupDSTBase(dstbase);
133
134 if(!(ivideo->CommandReg & X_INC)) {
135 src_x += width-1;
136 dst_x += width-1;
137 }
138 if(!(ivideo->CommandReg & Y_INC)) {
139 src_y += height-1;
140 dst_y += height-1;
141 }
142 SiS300SetupRect(width, height)
143 SiS300SetupSRCXY(src_x, src_y)
144 SiS300SetupDSTXY(dst_x, dst_y)
145 SiS300DoCMD
146 }
147
148 static void
149 SiS300SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
150 {
151 SiS300SetupPATFG(color)
152 SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
153 SiS300SetupDSTColorDepth(ivideo->DstColor);
154 SiS300SetupROP(sisPatALUConv[rop])
155 SiS300SetupCMDFlag(PATFG)
156 }
157
158 static void
159 SiS300SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
160 {
161 u32 dstbase = 0;
162
163 if(y >= 2048) {
164 dstbase = ivideo->video_linelength * y;
165 y = 0;
166 }
167 SiS300SetupDSTBase(dstbase)
168 SiS300SetupDSTXY(x,y)
169 SiS300SetupRect(w,h)
170 SiS300SetupCMDFlag(X_INC | Y_INC | BITBLT)
171 SiS300DoCMD
172 }
173 #endif
174
175 /* 315/330/340 series ---------------------------------------------- */
176
177 #ifdef CONFIG_FB_SIS_315
178 static void
179 SiS310Sync(struct sis_video_info *ivideo)
180 {
181 SiS310Idle
182 }
183
184 static void
185 SiS310SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int rop, int trans_color)
186 {
187 SiS310SetupDSTColorDepth(ivideo->DstColor);
188 SiS310SetupSRCPitch(ivideo->video_linelength)
189 SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
190 if(trans_color != -1) {
191 SiS310SetupROP(0x0A)
192 SiS310SetupSRCTrans(trans_color)
193 SiS310SetupCMDFlag(TRANSPARENT_BITBLT)
194 } else {
195 SiS310SetupROP(sisALUConv[rop])
196 /* Set command - not needed, both 0 */
197 /* SiSSetupCMDFlag(BITBLT | SRCVIDEO) */
198 }
199 SiS310SetupCMDFlag(ivideo->SiS310_AccelDepth)
200 /* The chip is smart enough to know the direction */
201 }
202
203 static void
204 SiS310SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x, int src_y,
205 int dst_x, int dst_y, int width, int height)
206 {
207 u32 srcbase = 0, dstbase = 0;
208 int mymin = min(src_y, dst_y);
209 int mymax = max(src_y, dst_y);
210
211 /* Although the chip knows the direction to use
212 * if the source and destination areas overlap,
213 * that logic fails if we fiddle with the bitmap
214 * addresses. Therefore, we check if the source
215 * and destination blitting areas overlap and
216 * adapt the bitmap addresses synchronously
217 * if the coordinates exceed the valid range.
218 * The the areas do not overlap, we do our
219 * normal check.
220 */
221 if((mymax - mymin) < height) {
222 if((src_y >= 2048) || (dst_y >= 2048)) {
223 srcbase = ivideo->video_linelength * mymin;
224 dstbase = ivideo->video_linelength * mymin;
225 src_y -= mymin;
226 dst_y -= mymin;
227 }
228 } else {
229 if(src_y >= 2048) {
230 srcbase = ivideo->video_linelength * src_y;
231 src_y = 0;
232 }
233 if(dst_y >= 2048) {
234 dstbase = ivideo->video_linelength * dst_y;
235 dst_y = 0;
236 }
237 }
238
239 srcbase += ivideo->video_offset;
240 dstbase += ivideo->video_offset;
241
242 SiS310SetupSRCBase(srcbase);
243 SiS310SetupDSTBase(dstbase);
244 SiS310SetupRect(width, height)
245 SiS310SetupSRCXY(src_x, src_y)
246 SiS310SetupDSTXY(dst_x, dst_y)
247 SiS310DoCMD
248 }
249
250 static void
251 SiS310SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
252 {
253 SiS310SetupPATFG(color)
254 SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
255 SiS310SetupDSTColorDepth(ivideo->DstColor);
256 SiS310SetupROP(sisPatALUConv[rop])
257 SiS310SetupCMDFlag(PATFG | ivideo->SiS310_AccelDepth)
258 }
259
260 static void
261 SiS310SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
262 {
263 u32 dstbase = 0;
264
265 if(y >= 2048) {
266 dstbase = ivideo->video_linelength * y;
267 y = 0;
268 }
269 dstbase += ivideo->video_offset;
270 SiS310SetupDSTBase(dstbase)
271 SiS310SetupDSTXY(x,y)
272 SiS310SetupRect(w,h)
273 SiS310SetupCMDFlag(BITBLT)
274 SiS310DoCMD
275 }
276 #endif
277
278 /* --------------------------------------------------------------------- */
279
280 /* The exported routines */
281
282 int sisfb_initaccel(struct sis_video_info *ivideo)
283 {
284 #ifdef SISFB_USE_SPINLOCKS
285 spin_lock_init(&ivideo->lockaccel);
286 #endif
287 return 0;
288 }
289
290 void sisfb_syncaccel(struct sis_video_info *ivideo)
291 {
292 if(ivideo->sisvga_engine == SIS_300_VGA) {
293 #ifdef CONFIG_FB_SIS_300
294 SiS300Sync(ivideo);
295 #endif
296 } else {
297 #ifdef CONFIG_FB_SIS_315
298 SiS310Sync(ivideo);
299 #endif
300 }
301 }
302
303 int fbcon_sis_sync(struct fb_info *info)
304 {
305 struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
306 CRITFLAGS
307
308 if((!ivideo->accel) || (!ivideo->engineok))
309 return 0;
310
311 CRITBEGIN
312 sisfb_syncaccel(ivideo);
313 CRITEND
314
315 return 0;
316 }
317
318 void fbcon_sis_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
319 {
320 struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
321 u32 col = 0;
322 u32 vxres = info->var.xres_virtual;
323 u32 vyres = info->var.yres_virtual;
324 int width, height;
325 CRITFLAGS
326
327 if(info->state != FBINFO_STATE_RUNNING)
328 return;
329
330 if((!ivideo->accel) || (!ivideo->engineok)) {
331 cfb_fillrect(info, rect);
332 return;
333 }
334
335 if(!rect->width || !rect->height || rect->dx >= vxres || rect->dy >= vyres)
336 return;
337
338 /* Clipping */
339 width = ((rect->dx + rect->width) > vxres) ? (vxres - rect->dx) : rect->width;
340 height = ((rect->dy + rect->height) > vyres) ? (vyres - rect->dy) : rect->height;
341
342 switch(info->var.bits_per_pixel) {
343 case 8: col = rect->color;
344 break;
345 case 16:
346 case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
347 break;
348 }
349
350 if(ivideo->sisvga_engine == SIS_300_VGA) {
351 #ifdef CONFIG_FB_SIS_300
352 CRITBEGIN
353 SiS300SetupForSolidFill(ivideo, col, myrops[rect->rop]);
354 SiS300SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
355 CRITEND
356 #endif
357 } else {
358 #ifdef CONFIG_FB_SIS_315
359 CRITBEGIN
360 SiS310SetupForSolidFill(ivideo, col, myrops[rect->rop]);
361 SiS310SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
362 CRITEND
363 #endif
364 }
365
366 sisfb_syncaccel(ivideo);
367 }
368
369 void fbcon_sis_copyarea(struct fb_info *info, const struct fb_copyarea *area)
370 {
371 struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
372 u32 vxres = info->var.xres_virtual;
373 u32 vyres = info->var.yres_virtual;
374 int width = area->width;
375 int height = area->height;
376 CRITFLAGS
377
378 if(info->state != FBINFO_STATE_RUNNING)
379 return;
380
381 if((!ivideo->accel) || (!ivideo->engineok)) {
382 cfb_copyarea(info, area);
383 return;
384 }
385
386 if(!width || !height ||
387 area->sx >= vxres || area->sy >= vyres ||
388 area->dx >= vxres || area->dy >= vyres)
389 return;
390
391 /* Clipping */
392 if((area->sx + width) > vxres) width = vxres - area->sx;
393 if((area->dx + width) > vxres) width = vxres - area->dx;
394 if((area->sy + height) > vyres) height = vyres - area->sy;
395 if((area->dy + height) > vyres) height = vyres - area->dy;
396
397 if(ivideo->sisvga_engine == SIS_300_VGA) {
398 #ifdef CONFIG_FB_SIS_300
399 int xdir, ydir;
400
401 if(area->sx < area->dx) xdir = 0;
402 else xdir = 1;
403 if(area->sy < area->dy) ydir = 0;
404 else ydir = 1;
405
406 CRITBEGIN
407 SiS300SetupForScreenToScreenCopy(ivideo, xdir, ydir, 3, -1);
408 SiS300SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
409 area->dx, area->dy, width, height);
410 CRITEND
411 #endif
412 } else {
413 #ifdef CONFIG_FB_SIS_315
414 CRITBEGIN
415 SiS310SetupForScreenToScreenCopy(ivideo, 3, -1);
416 SiS310SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
417 area->dx, area->dy, width, height);
418 CRITEND
419 #endif
420 }
421
422 sisfb_syncaccel(ivideo);
423 }
Linux with added FPC-III support