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 }
424