1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200 and G400
5  *
6  * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
7  *
8  * Version: 1.65 2002/08/14
9  *
10  * MTRR stuff: 1998 Tom Rini <trini@kernel.crashing.org>
11  *
12  * Contributors: "menion?" <menion@mindless.com>
13  *                     Betatesting, fixes, ideas
14  *
15  *               "Kurt Garloff" <garloff@suse.de>
16  *                     Betatesting, fixes, ideas, videomodes, videomodes timmings
17  *
18  *               "Tom Rini" <trini@kernel.crashing.org>
19  *                     MTRR stuff, PPC cleanups, betatesting, fixes, ideas
20  *
21  *               "Bibek Sahu" <scorpio@dodds.net>
22  *                     Access device through readb|w|l and write b|w|l
23  *                     Extensive debugging stuff
24  *
25  *               "Daniel Haun" <haund@usa.net>
26  *                     Testing, hardware cursor fixes
27  *
28  *               "Scott Wood" <sawst46+@pitt.edu>
29  *                     Fixes
30  *
31  *               "Gerd Knorr" <kraxel@goldbach.isdn.cs.tu-berlin.de>
32  *                     Betatesting
33  *
34  *               "Kelly French" <targon@hazmat.com>
35  *               "Fernando Herrera" <fherrera@eurielec.etsit.upm.es>
36  *                     Betatesting, bug reporting
37  *
38  *               "Pablo Bianucci" <pbian@pccp.com.ar>
39  *                     Fixes, ideas, betatesting
40  *
41  *               "Inaky Perez Gonzalez" <inaky@peloncho.fis.ucm.es>
42  *                     Fixes, enhandcements, ideas, betatesting
43  *
44  *               "Ryuichi Oikawa" <roikawa@rr.iiij4u.or.jp>
45  *                     PPC betatesting, PPC support, backward compatibility
46  *
47  *               "Paul Womar" <Paul@pwomar.demon.co.uk>
48  *               "Owen Waller" <O.Waller@ee.qub.ac.uk>
49  *                     PPC betatesting
50  *
51  *               "Thomas Pornin" <pornin@bolet.ens.fr>
52  *                     Alpha betatesting
53  *
54  *               "Pieter van Leuven" <pvl@iae.nl>
55  *               "Ulf Jaenicke-Roessler" <ujr@physik.phy.tu-dresden.de>
56  *                     G100 testing
57  *
58  *               "H. Peter Arvin" <hpa@transmeta.com>
59  *                     Ideas
60  *
61  *               "Cort Dougan" <cort@cs.nmt.edu>
62  *                     CHRP fixes and PReP cleanup
63  *
64  *               "Mark Vojkovich" <mvojkovi@ucsd.edu>
65  *                     G400 support
66  *
67  * (following author is not in any relation with this code, but his code
68  *  is included in this driver)
69  *
70  * Based on framebuffer driver for VBE 2.0 compliant graphic boards
71  *     (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
72  *
73  * (following author is not in any relation with this code, but his ideas
74  *  were used when writing this driver)
75  *
76  *		 FreeVBE/AF (Matrox), "Shawn Hargreaves" <shawn@talula.demon.co.uk>
77  *
78  */
79 
80 #include "matroxfb_accel.h"
81 #include "matroxfb_DAC1064.h"
82 #include "matroxfb_Ti3026.h"
83 #include "matroxfb_misc.h"
84 
85 #define curr_ydstorg(x)	((x)->curr.ydstorg.pixels)
86 
87 #define mga_ydstlen(y,l) mga_outl(M_YDSTLEN | M_EXEC, ((y) << 16) | (l))
88 
89 static inline void matrox_cfb4_pal(u_int32_t* pal) {
90 	unsigned int i;
91 
92 	for (i = 0; i < 16; i++) {
93 		pal[i] = i * 0x11111111U;
94 	}
95 }
96 
97 static inline void matrox_cfb8_pal(u_int32_t* pal) {
98 	unsigned int i;
99 
100 	for (i = 0; i < 16; i++) {
101 		pal[i] = i * 0x01010101U;
102 	}
103 }
104 
105 static void matroxfb_copyarea(struct fb_info* info, const struct fb_copyarea* area);
106 static void matroxfb_fillrect(struct fb_info* info, const struct fb_fillrect* rect);
107 static void matroxfb_imageblit(struct fb_info* info, const struct fb_image* image);
108 static void matroxfb_cfb4_fillrect(struct fb_info* info, const struct fb_fillrect* rect);
109 static void matroxfb_cfb4_copyarea(struct fb_info* info, const struct fb_copyarea* area);
110 
111 void matrox_cfbX_init(struct matrox_fb_info *minfo)
112 {
113 	u_int32_t maccess;
114 	u_int32_t mpitch;
115 	u_int32_t mopmode;
116 	int accel;
117 
118 	DBG(__func__)
119 
120 	mpitch = minfo->fbcon.var.xres_virtual;
121 
122 	minfo->fbops.fb_copyarea = cfb_copyarea;
123 	minfo->fbops.fb_fillrect = cfb_fillrect;
124 	minfo->fbops.fb_imageblit = cfb_imageblit;
125 	minfo->fbops.fb_cursor = NULL;
126 
127 	accel = (minfo->fbcon.var.accel_flags & FB_ACCELF_TEXT) == FB_ACCELF_TEXT;
128 
129 	switch (minfo->fbcon.var.bits_per_pixel) {
130 		case 4:		maccess = 0x00000000;	/* accelerate as 8bpp video */
131 				mpitch = (mpitch >> 1) | 0x8000; /* disable linearization */
132 				mopmode = M_OPMODE_4BPP;
133 				matrox_cfb4_pal(minfo->cmap);
134 				if (accel && !(mpitch & 1)) {
135 					minfo->fbops.fb_copyarea = matroxfb_cfb4_copyarea;
136 					minfo->fbops.fb_fillrect = matroxfb_cfb4_fillrect;
137 				}
138 				break;
139 		case 8:		maccess = 0x00000000;
140 				mopmode = M_OPMODE_8BPP;
141 				matrox_cfb8_pal(minfo->cmap);
142 				if (accel) {
143 					minfo->fbops.fb_copyarea = matroxfb_copyarea;
144 					minfo->fbops.fb_fillrect = matroxfb_fillrect;
145 					minfo->fbops.fb_imageblit = matroxfb_imageblit;
146 				}
147 				break;
148 		case 16:	if (minfo->fbcon.var.green.length == 5)
149 					maccess = 0xC0000001;
150 				else
151 					maccess = 0x40000001;
152 				mopmode = M_OPMODE_16BPP;
153 				if (accel) {
154 					minfo->fbops.fb_copyarea = matroxfb_copyarea;
155 					minfo->fbops.fb_fillrect = matroxfb_fillrect;
156 					minfo->fbops.fb_imageblit = matroxfb_imageblit;
157 				}
158 				break;
159 		case 24:	maccess = 0x00000003;
160 				mopmode = M_OPMODE_24BPP;
161 				if (accel) {
162 					minfo->fbops.fb_copyarea = matroxfb_copyarea;
163 					minfo->fbops.fb_fillrect = matroxfb_fillrect;
164 					minfo->fbops.fb_imageblit = matroxfb_imageblit;
165 				}
166 				break;
167 		case 32:	maccess = 0x00000002;
168 				mopmode = M_OPMODE_32BPP;
169 				if (accel) {
170 					minfo->fbops.fb_copyarea = matroxfb_copyarea;
171 					minfo->fbops.fb_fillrect = matroxfb_fillrect;
172 					minfo->fbops.fb_imageblit = matroxfb_imageblit;
173 				}
174 				break;
175 		default:	maccess = 0x00000000;
176 				mopmode = 0x00000000;
177 				break;	/* turn off acceleration!!! */
178 	}
179 	mga_fifo(8);
180 	mga_outl(M_PITCH, mpitch);
181 	mga_outl(M_YDSTORG, curr_ydstorg(minfo));
182 	if (minfo->capable.plnwt)
183 		mga_outl(M_PLNWT, -1);
184 	if (minfo->capable.srcorg) {
185 		mga_outl(M_SRCORG, 0);
186 		mga_outl(M_DSTORG, 0);
187 	}
188 	mga_outl(M_OPMODE, mopmode);
189 	mga_outl(M_CXBNDRY, 0xFFFF0000);
190 	mga_outl(M_YTOP, 0);
191 	mga_outl(M_YBOT, 0x01FFFFFF);
192 	mga_outl(M_MACCESS, maccess);
193 	minfo->accel.m_dwg_rect = M_DWG_TRAP | M_DWG_SOLID | M_DWG_ARZERO | M_DWG_SGNZERO | M_DWG_SHIFTZERO;
194 	if (isMilleniumII(minfo)) minfo->accel.m_dwg_rect |= M_DWG_TRANSC;
195 	minfo->accel.m_opmode = mopmode;
196 	minfo->accel.m_access = maccess;
197 	minfo->accel.m_pitch = mpitch;
198 }
199 
200 EXPORT_SYMBOL(matrox_cfbX_init);
201 
202 static void matrox_accel_restore_maccess(struct matrox_fb_info *minfo)
203 {
204 	mga_outl(M_MACCESS, minfo->accel.m_access);
205 	mga_outl(M_PITCH, minfo->accel.m_pitch);
206 }
207 
208 static void matrox_accel_bmove(struct matrox_fb_info *minfo, int vxres, int sy,
209 			       int sx, int dy, int dx, int height, int width)
210 {
211 	int start, end;
212 	CRITFLAGS
213 
214 	DBG(__func__)
215 
216 	CRITBEGIN
217 
218 	if ((dy < sy) || ((dy == sy) && (dx <= sx))) {
219 		mga_fifo(4);
220 		matrox_accel_restore_maccess(minfo);
221 		mga_outl(M_DWGCTL, M_DWG_BITBLT | M_DWG_SHIFTZERO | M_DWG_SGNZERO |
222 			 M_DWG_BFCOL | M_DWG_REPLACE);
223 		mga_outl(M_AR5, vxres);
224 		width--;
225 		start = sy*vxres+sx+curr_ydstorg(minfo);
226 		end = start+width;
227 	} else {
228 		mga_fifo(5);
229 		matrox_accel_restore_maccess(minfo);
230 		mga_outl(M_DWGCTL, M_DWG_BITBLT | M_DWG_SHIFTZERO | M_DWG_BFCOL | M_DWG_REPLACE);
231 		mga_outl(M_SGN, 5);
232 		mga_outl(M_AR5, -vxres);
233 		width--;
234 		end = (sy+height-1)*vxres+sx+curr_ydstorg(minfo);
235 		start = end+width;
236 		dy += height-1;
237 	}
238 	mga_fifo(6);
239 	matrox_accel_restore_maccess(minfo);
240 	mga_outl(M_AR0, end);
241 	mga_outl(M_AR3, start);
242 	mga_outl(M_FXBNDRY, ((dx+width)<<16) | dx);
243 	mga_ydstlen(dy, height);
244 	WaitTillIdle();
245 
246 	CRITEND
247 }
248 
249 static void matrox_accel_bmove_lin(struct matrox_fb_info *minfo, int vxres,
250 				   int sy, int sx, int dy, int dx, int height,
251 				   int width)
252 {
253 	int start, end;
254 	CRITFLAGS
255 
256 	DBG(__func__)
257 
258 	CRITBEGIN
259 
260 	if ((dy < sy) || ((dy == sy) && (dx <= sx))) {
261 		mga_fifo(4);
262 		matrox_accel_restore_maccess(minfo);
263 		mga_outl(M_DWGCTL, M_DWG_BITBLT | M_DWG_SHIFTZERO | M_DWG_SGNZERO |
264 			M_DWG_BFCOL | M_DWG_REPLACE);
265 		mga_outl(M_AR5, vxres);
266 		width--;
267 		start = sy*vxres+sx+curr_ydstorg(minfo);
268 		end = start+width;
269 	} else {
270 		mga_fifo(5);
271 		matrox_accel_restore_maccess(minfo);
272 		mga_outl(M_DWGCTL, M_DWG_BITBLT | M_DWG_SHIFTZERO | M_DWG_BFCOL | M_DWG_REPLACE);
273 		mga_outl(M_SGN, 5);
274 		mga_outl(M_AR5, -vxres);
275 		width--;
276 		end = (sy+height-1)*vxres+sx+curr_ydstorg(minfo);
277 		start = end+width;
278 		dy += height-1;
279 	}
280 	mga_fifo(7);
281 	matrox_accel_restore_maccess(minfo);
282 	mga_outl(M_AR0, end);
283 	mga_outl(M_AR3, start);
284 	mga_outl(M_FXBNDRY, ((dx+width)<<16) | dx);
285 	mga_outl(M_YDST, dy*vxres >> 5);
286 	mga_outl(M_LEN | M_EXEC, height);
287 	WaitTillIdle();
288 
289 	CRITEND
290 }
291 
292 static void matroxfb_cfb4_copyarea(struct fb_info* info, const struct fb_copyarea* area) {
293 	struct matrox_fb_info *minfo = info2minfo(info);
294 
295 	if ((area->sx | area->dx | area->width) & 1)
296 		cfb_copyarea(info, area);
297 	else
298 		matrox_accel_bmove_lin(minfo, minfo->fbcon.var.xres_virtual >> 1, area->sy, area->sx >> 1, area->dy, area->dx >> 1, area->height, area->width >> 1);
299 }
300 
301 static void matroxfb_copyarea(struct fb_info* info, const struct fb_copyarea* area) {
302 	struct matrox_fb_info *minfo = info2minfo(info);
303 
304 	matrox_accel_bmove(minfo, minfo->fbcon.var.xres_virtual, area->sy, area->sx, area->dy, area->dx, area->height, area->width);
305 }
306 
307 static void matroxfb_accel_clear(struct matrox_fb_info *minfo, u_int32_t color,
308 				 int sy, int sx, int height, int width)
309 {
310 	CRITFLAGS
311 
312 	DBG(__func__)
313 
314 	CRITBEGIN
315 
316 	mga_fifo(7);
317 	matrox_accel_restore_maccess(minfo);
318 	mga_outl(M_DWGCTL, minfo->accel.m_dwg_rect | M_DWG_REPLACE);
319 	mga_outl(M_FCOL, color);
320 	mga_outl(M_FXBNDRY, ((sx + width) << 16) | sx);
321 	mga_ydstlen(sy, height);
322 	WaitTillIdle();
323 
324 	CRITEND
325 }
326 
327 static void matroxfb_fillrect(struct fb_info* info, const struct fb_fillrect* rect) {
328 	struct matrox_fb_info *minfo = info2minfo(info);
329 
330 	switch (rect->rop) {
331 		case ROP_COPY:
332 			matroxfb_accel_clear(minfo, ((u_int32_t *)info->pseudo_palette)[rect->color], rect->dy, rect->dx, rect->height, rect->width);
333 			break;
334 	}
335 }
336 
337 static void matroxfb_cfb4_clear(struct matrox_fb_info *minfo, u_int32_t bgx,
338 				int sy, int sx, int height, int width)
339 {
340 	int whattodo;
341 	CRITFLAGS
342 
343 	DBG(__func__)
344 
345 	CRITBEGIN
346 
347 	whattodo = 0;
348 	if (sx & 1) {
349 		sx ++;
350 		if (!width) return;
351 		width --;
352 		whattodo = 1;
353 	}
354 	if (width & 1) {
355 		whattodo |= 2;
356 	}
357 	width >>= 1;
358 	sx >>= 1;
359 	if (width) {
360 		mga_fifo(7);
361 		matrox_accel_restore_maccess(minfo);
362 		mga_outl(M_DWGCTL, minfo->accel.m_dwg_rect | M_DWG_REPLACE2);
363 		mga_outl(M_FCOL, bgx);
364 		mga_outl(M_FXBNDRY, ((sx + width) << 16) | sx);
365 		mga_outl(M_YDST, sy * minfo->fbcon.var.xres_virtual >> 6);
366 		mga_outl(M_LEN | M_EXEC, height);
367 		WaitTillIdle();
368 	}
369 	if (whattodo) {
370 		u_int32_t step = minfo->fbcon.var.xres_virtual >> 1;
371 		vaddr_t vbase = minfo->video.vbase;
372 		if (whattodo & 1) {
373 			unsigned int uaddr = sy * step + sx - 1;
374 			u_int32_t loop;
375 			u_int8_t bgx2 = bgx & 0xF0;
376 			for (loop = height; loop > 0; loop --) {
377 				mga_writeb(vbase, uaddr, (mga_readb(vbase, uaddr) & 0x0F) | bgx2);
378 				uaddr += step;
379 			}
380 		}
381 		if (whattodo & 2) {
382 			unsigned int uaddr = sy * step + sx + width;
383 			u_int32_t loop;
384 			u_int8_t bgx2 = bgx & 0x0F;
385 			for (loop = height; loop > 0; loop --) {
386 				mga_writeb(vbase, uaddr, (mga_readb(vbase, uaddr) & 0xF0) | bgx2);
387 				uaddr += step;
388 			}
389 		}
390 	}
391 
392 	CRITEND
393 }
394 
395 static void matroxfb_cfb4_fillrect(struct fb_info* info, const struct fb_fillrect* rect) {
396 	struct matrox_fb_info *minfo = info2minfo(info);
397 
398 	switch (rect->rop) {
399 		case ROP_COPY:
400 			matroxfb_cfb4_clear(minfo, ((u_int32_t *)info->pseudo_palette)[rect->color], rect->dy, rect->dx, rect->height, rect->width);
401 			break;
402 	}
403 }
404 
405 static void matroxfb_1bpp_imageblit(struct matrox_fb_info *minfo, u_int32_t fgx,
406 				    u_int32_t bgx, const u_int8_t *chardata,
407 				    int width, int height, int yy, int xx)
408 {
409 	u_int32_t step;
410 	u_int32_t ydstlen;
411 	u_int32_t xlen;
412 	u_int32_t ar0;
413 	u_int32_t charcell;
414 	u_int32_t fxbndry;
415 	vaddr_t mmio;
416 	int easy;
417 	CRITFLAGS
418 
419 	DBG_HEAVY(__func__);
420 
421 	step = (width + 7) >> 3;
422 	charcell = height * step;
423 	xlen = (charcell + 3) & ~3;
424 	ydstlen = (yy << 16) | height;
425 	if (width == step << 3) {
426 		ar0 = height * width - 1;
427 		easy = 1;
428 	} else {
429 		ar0 = width - 1;
430 		easy = 0;
431 	}
432 
433 	CRITBEGIN
434 
435 	mga_fifo(5);
436 	matrox_accel_restore_maccess(minfo);
437 	if (easy)
438 		mga_outl(M_DWGCTL, M_DWG_ILOAD | M_DWG_SGNZERO | M_DWG_SHIFTZERO | M_DWG_BMONOWF | M_DWG_LINEAR | M_DWG_REPLACE);
439 	else
440 		mga_outl(M_DWGCTL, M_DWG_ILOAD | M_DWG_SGNZERO | M_DWG_SHIFTZERO | M_DWG_BMONOWF | M_DWG_REPLACE);
441 	mga_outl(M_FCOL, fgx);
442 	mga_outl(M_BCOL, bgx);
443 	fxbndry = ((xx + width - 1) << 16) | xx;
444 	mmio = minfo->mmio.vbase;
445 
446 	mga_fifo(8);
447 	matrox_accel_restore_maccess(minfo);
448 	mga_writel(mmio, M_FXBNDRY, fxbndry);
449 	mga_writel(mmio, M_AR0, ar0);
450 	mga_writel(mmio, M_AR3, 0);
451 	if (easy) {
452 		mga_writel(mmio, M_YDSTLEN | M_EXEC, ydstlen);
453 		mga_memcpy_toio(mmio, chardata, xlen);
454 	} else {
455 		mga_writel(mmio, M_AR5, 0);
456 		mga_writel(mmio, M_YDSTLEN | M_EXEC, ydstlen);
457 		if ((step & 3) == 0) {
458 			/* Great. Source has 32bit aligned lines, so we can feed them
459 			   directly to the accelerator. */
460 			mga_memcpy_toio(mmio, chardata, charcell);
461 		} else if (step == 1) {
462 			/* Special case for 1..8bit widths */
463 			while (height--) {
464 #if defined(__BIG_ENDIAN)
465 				fb_writel((*chardata) << 24, mmio.vaddr);
466 #else
467 				fb_writel(*chardata, mmio.vaddr);
468 #endif
469 				chardata++;
470 			}
471 		} else if (step == 2) {
472 			/* Special case for 9..15bit widths */
473 			while (height--) {
474 #if defined(__BIG_ENDIAN)
475 				fb_writel((*(u_int16_t*)chardata) << 16, mmio.vaddr);
476 #else
477 				fb_writel(*(u_int16_t*)chardata, mmio.vaddr);
478 #endif
479 				chardata += 2;
480 			}
481 		} else {
482 			/* Tell... well, why bother... */
483 			while (height--) {
484 				size_t i;
485 
486 				for (i = 0; i < step; i += 4) {
487 					/* Hope that there are at least three readable bytes beyond the end of bitmap */
488 					fb_writel(get_unaligned((u_int32_t*)(chardata + i)),mmio.vaddr);
489 				}
490 				chardata += step;
491 			}
492 		}
493 	}
494 	WaitTillIdle();
495 	CRITEND
496 }
497 
498 
499 static void matroxfb_imageblit(struct fb_info* info, const struct fb_image* image) {
500 	struct matrox_fb_info *minfo = info2minfo(info);
501 
502 	DBG_HEAVY(__func__);
503 
504 	if (image->depth == 1) {
505 		u_int32_t fgx, bgx;
506 
507 		fgx = ((u_int32_t*)info->pseudo_palette)[image->fg_color];
508 		bgx = ((u_int32_t*)info->pseudo_palette)[image->bg_color];
509 		matroxfb_1bpp_imageblit(minfo, fgx, bgx, image->data, image->width, image->height, image->dy, image->dx);
510 	} else {
511 		/* Danger! image->depth is useless: logo painting code always
512 		   passes framebuffer color depth here, although logo data are
513 		   always 8bpp and info->pseudo_palette is changed to contain
514 		   logo palette to be used (but only for true/direct-color... sic...).
515 		   So do it completely in software... */
516 		cfb_imageblit(info, image);
517 	}
518 }
519 
520 MODULE_LICENSE("GPL");
521