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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[linux-2.6-omap-h63xx.git] / drivers / video / sis / sis_accel.c
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 }