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/version.h>
32#include <linux/module.h>
33#include <linux/kernel.h>
34#include <linux/fb.h>
35#include <linux/ioport.h>
36#include <linux/types.h>
37#include <asm/io.h>
38
39#include "sis.h"
40#include "sis_accel.h"
41
42static const u8 sisALUConv[] =
43{
44    0x00,       /* dest = 0;            0,      GXclear,        0 */
45    0x88,       /* dest &= src;         DSa,    GXand,          0x1 */
46    0x44,       /* dest = src & ~dest;  SDna,   GXandReverse,   0x2 */
47    0xCC,       /* dest = src;          S,      GXcopy,         0x3 */
48    0x22,       /* dest &= ~src;        DSna,   GXandInverted,  0x4 */
49    0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
50    0x66,       /* dest = ^src;         DSx,    GXxor,          0x6 */
51    0xEE,       /* dest |= src;         DSo,    GXor,           0x7 */
52    0x11,       /* dest = ~src & ~dest; DSon,   GXnor,          0x8 */
53    0x99,       /* dest ^= ~src ;       DSxn,   GXequiv,        0x9 */
54    0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
55    0xDD,       /* dest = src|~dest ;   SDno,   GXorReverse,    0xB */
56    0x33,       /* dest = ~src;         Sn,     GXcopyInverted, 0xC */
57    0xBB,       /* dest |= ~src;        DSno,   GXorInverted,   0xD */
58    0x77,       /* dest = ~src|~dest;   DSan,   GXnand,         0xE */
59    0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
60};
61/* same ROP but with Pattern as Source */
62static const u8 sisPatALUConv[] =
63{
64    0x00,       /* dest = 0;            0,      GXclear,        0 */
65    0xA0,       /* dest &= src;         DPa,    GXand,          0x1 */
66    0x50,       /* dest = src & ~dest;  PDna,   GXandReverse,   0x2 */
67    0xF0,       /* dest = src;          P,      GXcopy,         0x3 */
68    0x0A,       /* dest &= ~src;        DPna,   GXandInverted,  0x4 */
69    0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
70    0x5A,       /* dest = ^src;         DPx,    GXxor,          0x6 */
71    0xFA,       /* dest |= src;         DPo,    GXor,           0x7 */
72    0x05,       /* dest = ~src & ~dest; DPon,   GXnor,          0x8 */
73    0xA5,       /* dest ^= ~src ;       DPxn,   GXequiv,        0x9 */
74    0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
75    0xF5,       /* dest = src|~dest ;   PDno,   GXorReverse,    0xB */
76    0x0F,       /* dest = ~src;         Pn,     GXcopyInverted, 0xC */
77    0xAF,       /* dest |= ~src;        DPno,   GXorInverted,   0xD */
78    0x5F,       /* dest = ~src|~dest;   DPan,   GXnand,         0xE */
79    0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
80};
81
82static const int myrops[] = {
83   	3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
84};
85
86/* 300 series ----------------------------------------------------- */
87#ifdef CONFIG_FB_SIS_300
88static void
89SiS300Sync(struct sis_video_info *ivideo)
90{
91	SiS300Idle
92}
93
94static void
95SiS300SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int xdir, int ydir,
96                                 int rop, int trans_color)
97{
98	SiS300SetupDSTColorDepth(ivideo->DstColor);
99	SiS300SetupSRCPitch(ivideo->video_linelength)
100	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
101
102	if(trans_color != -1) {
103		SiS300SetupROP(0x0A)
104		SiS300SetupSRCTrans(trans_color)
105		SiS300SetupCMDFlag(TRANSPARENT_BITBLT)
106	} else {
107	        SiS300SetupROP(sisALUConv[rop])
108	}
109	if(xdir > 0) {
110		SiS300SetupCMDFlag(X_INC)
111	}
112	if(ydir > 0) {
113		SiS300SetupCMDFlag(Y_INC)
114	}
115}
116
117static void
118SiS300SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x,
119				   int src_y, int dst_x, int dst_y, int width, int height)
120{
121	u32 srcbase = 0, dstbase = 0;
122
123	if(src_y >= 2048) {
124		srcbase = ivideo->video_linelength * src_y;
125		src_y = 0;
126	}
127	if(dst_y >= 2048) {
128		dstbase = ivideo->video_linelength * dst_y;
129		dst_y = 0;
130	}
131
132	SiS300SetupSRCBase(srcbase);
133	SiS300SetupDSTBase(dstbase);
134
135	if(!(ivideo->CommandReg & X_INC))  {
136		src_x += width-1;
137		dst_x += width-1;
138	}
139	if(!(ivideo->CommandReg & Y_INC))  {
140		src_y += height-1;
141		dst_y += height-1;
142	}
143	SiS300SetupRect(width, height)
144	SiS300SetupSRCXY(src_x, src_y)
145	SiS300SetupDSTXY(dst_x, dst_y)
146	SiS300DoCMD
147}
148
149static void
150SiS300SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
151{
152	SiS300SetupPATFG(color)
153	SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
154	SiS300SetupDSTColorDepth(ivideo->DstColor);
155	SiS300SetupROP(sisPatALUConv[rop])
156	SiS300SetupCMDFlag(PATFG)
157}
158
159static void
160SiS300SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
161{
162	u32 dstbase = 0;
163
164	if(y >= 2048) {
165		dstbase = ivideo->video_linelength * y;
166		y = 0;
167	}
168	SiS300SetupDSTBase(dstbase)
169	SiS300SetupDSTXY(x,y)
170	SiS300SetupRect(w,h)
171	SiS300SetupCMDFlag(X_INC | Y_INC | BITBLT)
172	SiS300DoCMD
173}
174#endif
175
176/* 315/330/340 series ---------------------------------------------- */
177
178#ifdef CONFIG_FB_SIS_315
179static void
180SiS310Sync(struct sis_video_info *ivideo)
181{
182	SiS310Idle
183}
184
185static void
186SiS310SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int rop, int trans_color)
187{
188	SiS310SetupDSTColorDepth(ivideo->DstColor);
189	SiS310SetupSRCPitch(ivideo->video_linelength)
190	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
191	if(trans_color != -1) {
192		SiS310SetupROP(0x0A)
193		SiS310SetupSRCTrans(trans_color)
194		SiS310SetupCMDFlag(TRANSPARENT_BITBLT)
195	} else {
196	        SiS310SetupROP(sisALUConv[rop])
197		/* Set command - not needed, both 0 */
198		/* SiSSetupCMDFlag(BITBLT | SRCVIDEO) */
199	}
200	SiS310SetupCMDFlag(ivideo->SiS310_AccelDepth)
201	/* The chip is smart enough to know the direction */
202}
203
204static void
205SiS310SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x, int src_y,
206			 int dst_x, int dst_y, int width, int height)
207{
208	u32 srcbase = 0, dstbase = 0;
209	int mymin = min(src_y, dst_y);
210	int mymax = max(src_y, dst_y);
211
212	/* Although the chip knows the direction to use
213	 * if the source and destination areas overlap,
214	 * that logic fails if we fiddle with the bitmap
215	 * addresses. Therefore, we check if the source
216	 * and destination blitting areas overlap and
217	 * adapt the bitmap addresses synchronously
218	 * if the coordinates exceed the valid range.
219	 * The the areas do not overlap, we do our
220	 * normal check.
221	 */
222	if((mymax - mymin) < height) {
223		if((src_y >= 2048) || (dst_y >= 2048)) {
224			srcbase = ivideo->video_linelength * mymin;
225			dstbase = ivideo->video_linelength * mymin;
226			src_y -= mymin;
227			dst_y -= mymin;
228		}
229	} else {
230		if(src_y >= 2048) {
231			srcbase = ivideo->video_linelength * src_y;
232			src_y = 0;
233		}
234		if(dst_y >= 2048) {
235			dstbase = ivideo->video_linelength * dst_y;
236			dst_y = 0;
237		}
238	}
239
240	srcbase += ivideo->video_offset;
241	dstbase += ivideo->video_offset;
242
243	SiS310SetupSRCBase(srcbase);
244	SiS310SetupDSTBase(dstbase);
245	SiS310SetupRect(width, height)
246	SiS310SetupSRCXY(src_x, src_y)
247	SiS310SetupDSTXY(dst_x, dst_y)
248	SiS310DoCMD
249}
250
251static void
252SiS310SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
253{
254	SiS310SetupPATFG(color)
255	SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
256	SiS310SetupDSTColorDepth(ivideo->DstColor);
257	SiS310SetupROP(sisPatALUConv[rop])
258	SiS310SetupCMDFlag(PATFG | ivideo->SiS310_AccelDepth)
259}
260
261static void
262SiS310SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
263{
264	u32 dstbase = 0;
265
266	if(y >= 2048) {
267		dstbase = ivideo->video_linelength * y;
268		y = 0;
269	}
270	dstbase += ivideo->video_offset;
271	SiS310SetupDSTBase(dstbase)
272	SiS310SetupDSTXY(x,y)
273	SiS310SetupRect(w,h)
274	SiS310SetupCMDFlag(BITBLT)
275	SiS310DoCMD
276}
277#endif
278
279/* --------------------------------------------------------------------- */
280
281/* The exported routines */
282
283int sisfb_initaccel(struct sis_video_info *ivideo)
284{
285#ifdef SISFB_USE_SPINLOCKS
286	spin_lock_init(&ivideo->lockaccel);
287#endif
288	return 0;
289}
290
291void sisfb_syncaccel(struct sis_video_info *ivideo)
292{
293	if(ivideo->sisvga_engine == SIS_300_VGA) {
294#ifdef CONFIG_FB_SIS_300
295		SiS300Sync(ivideo);
296#endif
297	} else {
298#ifdef CONFIG_FB_SIS_315
299		SiS310Sync(ivideo);
300#endif
301	}
302}
303
304int fbcon_sis_sync(struct fb_info *info)
305{
306	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
307	CRITFLAGS
308
309	if((!ivideo->accel) || (!ivideo->engineok))
310		return 0;
311
312	CRITBEGIN
313	sisfb_syncaccel(ivideo);
314	CRITEND
315
316	return 0;
317}
318
319void fbcon_sis_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
320{
321	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
322	u32 col = 0;
323	u32 vxres = info->var.xres_virtual;
324	u32 vyres = info->var.yres_virtual;
325	int width, height;
326	CRITFLAGS
327
328	if(info->state != FBINFO_STATE_RUNNING)
329		return;
330
331	if((!ivideo->accel) || (!ivideo->engineok)) {
332		cfb_fillrect(info, rect);
333		return;
334	}
335
336	if(!rect->width || !rect->height || rect->dx >= vxres || rect->dy >= vyres)
337		return;
338
339	/* Clipping */
340	width = ((rect->dx + rect->width) > vxres) ? (vxres - rect->dx) : rect->width;
341	height = ((rect->dy + rect->height) > vyres) ? (vyres - rect->dy) : rect->height;
342
343	switch(info->var.bits_per_pixel) {
344	case 8:  col = rect->color;
345		 break;
346	case 16:
347	case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
348		 break;
349	}
350
351	if(ivideo->sisvga_engine == SIS_300_VGA) {
352#ifdef CONFIG_FB_SIS_300
353		CRITBEGIN
354		SiS300SetupForSolidFill(ivideo, col, myrops[rect->rop]);
355		SiS300SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
356		CRITEND
357#endif
358	} else {
359#ifdef CONFIG_FB_SIS_315
360		CRITBEGIN
361		SiS310SetupForSolidFill(ivideo, col, myrops[rect->rop]);
362		SiS310SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
363		CRITEND
364#endif
365	}
366
367	sisfb_syncaccel(ivideo);
368}
369
370void fbcon_sis_copyarea(struct fb_info *info, const struct fb_copyarea *area)
371{
372	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
373	u32 vxres = info->var.xres_virtual;
374	u32 vyres = info->var.yres_virtual;
375	int width = area->width;
376	int height = area->height;
377	CRITFLAGS
378
379	if(info->state != FBINFO_STATE_RUNNING)
380		return;
381
382	if((!ivideo->accel) || (!ivideo->engineok)) {
383		cfb_copyarea(info, area);
384		return;
385	}
386
387	if(!width || !height ||
388	   area->sx >= vxres || area->sy >= vyres ||
389	   area->dx >= vxres || area->dy >= vyres)
390		return;
391
392	/* Clipping */
393	if((area->sx + width) > vxres) width = vxres - area->sx;
394	if((area->dx + width) > vxres) width = vxres - area->dx;
395	if((area->sy + height) > vyres) height = vyres - area->sy;
396	if((area->dy + height) > vyres) height = vyres - area->dy;
397
398	if(ivideo->sisvga_engine == SIS_300_VGA) {
399#ifdef CONFIG_FB_SIS_300
400		int xdir, ydir;
401
402		if(area->sx < area->dx) xdir = 0;
403		else                    xdir = 1;
404		if(area->sy < area->dy) ydir = 0;
405		else                    ydir = 1;
406
407		CRITBEGIN
408		SiS300SetupForScreenToScreenCopy(ivideo, xdir, ydir, 3, -1);
409		SiS300SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
410					area->dx, area->dy, width, height);
411		CRITEND
412#endif
413	} else {
414#ifdef CONFIG_FB_SIS_315
415		CRITBEGIN
416		SiS310SetupForScreenToScreenCopy(ivideo, 3, -1);
417		SiS310SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
418					area->dx, area->dy, width, height);
419		CRITEND
420#endif
421	}
422
423	sisfb_syncaccel(ivideo);
424}
425