1 // SPDX-License-Identifier: GPL-2.0-only
2 /* cg6.c: CGSIX (GX, GXplus, TGX) frame buffer driver
3 *
4 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
8 *
9 * Driver layout based loosely on tgafb.c, see that file for credits.
10 */
11
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
16 #include <linux/delay.h>
17 #include <linux/init.h>
18 #include <linux/fb.h>
19 #include <linux/mm.h>
20 #include <linux/of.h>
21 #include <linux/platform_device.h>
22
23 #include <asm/io.h>
24 #include <asm/fbio.h>
25
26 #include "sbuslib.h"
27
28 /*
29 * Local functions.
30 */
31
32 static int cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
33 unsigned, struct fb_info *);
34 static int cg6_blank(int, struct fb_info *);
35
36 static void cg6_imageblit(struct fb_info *, const struct fb_image *);
37 static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
38 static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
39 static int cg6_sync(struct fb_info *);
40 static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
41 static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
42 static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
43
44 /*
45 * Frame buffer operations
46 */
47
48 static const struct fb_ops cg6_ops = {
49 .owner = THIS_MODULE,
50 .fb_setcolreg = cg6_setcolreg,
51 .fb_blank = cg6_blank,
52 .fb_pan_display = cg6_pan_display,
53 .fb_fillrect = cg6_fillrect,
54 .fb_copyarea = cg6_copyarea,
55 .fb_imageblit = cg6_imageblit,
56 .fb_sync = cg6_sync,
57 .fb_mmap = cg6_mmap,
58 .fb_ioctl = cg6_ioctl,
59 #ifdef CONFIG_COMPAT
60 .fb_compat_ioctl = sbusfb_compat_ioctl,
61 #endif
62 };
63
64 /* Offset of interesting structures in the OBIO space */
65 /*
66 * Brooktree is the video dac and is funny to program on the cg6.
67 * (it's even funnier on the cg3)
68 * The FBC could be the frame buffer control
69 * The FHC could is the frame buffer hardware control.
70 */
71 #define CG6_ROM_OFFSET 0x0UL
72 #define CG6_BROOKTREE_OFFSET 0x200000UL
73 #define CG6_DHC_OFFSET 0x240000UL
74 #define CG6_ALT_OFFSET 0x280000UL
75 #define CG6_FHC_OFFSET 0x300000UL
76 #define CG6_THC_OFFSET 0x301000UL
77 #define CG6_FBC_OFFSET 0x700000UL
78 #define CG6_TEC_OFFSET 0x701000UL
79 #define CG6_RAM_OFFSET 0x800000UL
80
81 /* FHC definitions */
82 #define CG6_FHC_FBID_SHIFT 24
83 #define CG6_FHC_FBID_MASK 255
84 #define CG6_FHC_REV_SHIFT 20
85 #define CG6_FHC_REV_MASK 15
86 #define CG6_FHC_FROP_DISABLE (1 << 19)
87 #define CG6_FHC_ROW_DISABLE (1 << 18)
88 #define CG6_FHC_SRC_DISABLE (1 << 17)
89 #define CG6_FHC_DST_DISABLE (1 << 16)
90 #define CG6_FHC_RESET (1 << 15)
91 #define CG6_FHC_LITTLE_ENDIAN (1 << 13)
92 #define CG6_FHC_RES_MASK (3 << 11)
93 #define CG6_FHC_1024 (0 << 11)
94 #define CG6_FHC_1152 (1 << 11)
95 #define CG6_FHC_1280 (2 << 11)
96 #define CG6_FHC_1600 (3 << 11)
97 #define CG6_FHC_CPU_MASK (3 << 9)
98 #define CG6_FHC_CPU_SPARC (0 << 9)
99 #define CG6_FHC_CPU_68020 (1 << 9)
100 #define CG6_FHC_CPU_386 (2 << 9)
101 #define CG6_FHC_TEST (1 << 8)
102 #define CG6_FHC_TEST_X_SHIFT 4
103 #define CG6_FHC_TEST_X_MASK 15
104 #define CG6_FHC_TEST_Y_SHIFT 0
105 #define CG6_FHC_TEST_Y_MASK 15
106
107 /* FBC mode definitions */
108 #define CG6_FBC_BLIT_IGNORE 0x00000000
109 #define CG6_FBC_BLIT_NOSRC 0x00100000
110 #define CG6_FBC_BLIT_SRC 0x00200000
111 #define CG6_FBC_BLIT_ILLEGAL 0x00300000
112 #define CG6_FBC_BLIT_MASK 0x00300000
113
114 #define CG6_FBC_VBLANK 0x00080000
115
116 #define CG6_FBC_MODE_IGNORE 0x00000000
117 #define CG6_FBC_MODE_COLOR8 0x00020000
118 #define CG6_FBC_MODE_COLOR1 0x00040000
119 #define CG6_FBC_MODE_HRMONO 0x00060000
120 #define CG6_FBC_MODE_MASK 0x00060000
121
122 #define CG6_FBC_DRAW_IGNORE 0x00000000
123 #define CG6_FBC_DRAW_RENDER 0x00008000
124 #define CG6_FBC_DRAW_PICK 0x00010000
125 #define CG6_FBC_DRAW_ILLEGAL 0x00018000
126 #define CG6_FBC_DRAW_MASK 0x00018000
127
128 #define CG6_FBC_BWRITE0_IGNORE 0x00000000
129 #define CG6_FBC_BWRITE0_ENABLE 0x00002000
130 #define CG6_FBC_BWRITE0_DISABLE 0x00004000
131 #define CG6_FBC_BWRITE0_ILLEGAL 0x00006000
132 #define CG6_FBC_BWRITE0_MASK 0x00006000
133
134 #define CG6_FBC_BWRITE1_IGNORE 0x00000000
135 #define CG6_FBC_BWRITE1_ENABLE 0x00000800
136 #define CG6_FBC_BWRITE1_DISABLE 0x00001000
137 #define CG6_FBC_BWRITE1_ILLEGAL 0x00001800
138 #define CG6_FBC_BWRITE1_MASK 0x00001800
139
140 #define CG6_FBC_BREAD_IGNORE 0x00000000
141 #define CG6_FBC_BREAD_0 0x00000200
142 #define CG6_FBC_BREAD_1 0x00000400
143 #define CG6_FBC_BREAD_ILLEGAL 0x00000600
144 #define CG6_FBC_BREAD_MASK 0x00000600
145
146 #define CG6_FBC_BDISP_IGNORE 0x00000000
147 #define CG6_FBC_BDISP_0 0x00000080
148 #define CG6_FBC_BDISP_1 0x00000100
149 #define CG6_FBC_BDISP_ILLEGAL 0x00000180
150 #define CG6_FBC_BDISP_MASK 0x00000180
151
152 #define CG6_FBC_INDEX_MOD 0x00000040
153 #define CG6_FBC_INDEX_MASK 0x00000030
154
155 /* THC definitions */
156 #define CG6_THC_MISC_REV_SHIFT 16
157 #define CG6_THC_MISC_REV_MASK 15
158 #define CG6_THC_MISC_RESET (1 << 12)
159 #define CG6_THC_MISC_VIDEO (1 << 10)
160 #define CG6_THC_MISC_SYNC (1 << 9)
161 #define CG6_THC_MISC_VSYNC (1 << 8)
162 #define CG6_THC_MISC_SYNC_ENAB (1 << 7)
163 #define CG6_THC_MISC_CURS_RES (1 << 6)
164 #define CG6_THC_MISC_INT_ENAB (1 << 5)
165 #define CG6_THC_MISC_INT (1 << 4)
166 #define CG6_THC_MISC_INIT 0x9f
167 #define CG6_THC_CURSOFF ((65536-32) | ((65536-32) << 16))
168
169 /* The contents are unknown */
170 struct cg6_tec {
171 int tec_matrix;
172 int tec_clip;
173 int tec_vdc;
174 };
175
176 struct cg6_thc {
177 u32 thc_pad0[512];
178 u32 thc_hs; /* hsync timing */
179 u32 thc_hsdvs;
180 u32 thc_hd;
181 u32 thc_vs; /* vsync timing */
182 u32 thc_vd;
183 u32 thc_refresh;
184 u32 thc_misc;
185 u32 thc_pad1[56];
186 u32 thc_cursxy; /* cursor x,y position (16 bits each) */
187 u32 thc_cursmask[32]; /* cursor mask bits */
188 u32 thc_cursbits[32]; /* what to show where mask enabled */
189 };
190
191 struct cg6_fbc {
192 u32 xxx0[1];
193 u32 mode;
194 u32 clip;
195 u32 xxx1[1];
196 u32 s;
197 u32 draw;
198 u32 blit;
199 u32 font;
200 u32 xxx2[24];
201 u32 x0, y0, z0, color0;
202 u32 x1, y1, z1, color1;
203 u32 x2, y2, z2, color2;
204 u32 x3, y3, z3, color3;
205 u32 offx, offy;
206 u32 xxx3[2];
207 u32 incx, incy;
208 u32 xxx4[2];
209 u32 clipminx, clipminy;
210 u32 xxx5[2];
211 u32 clipmaxx, clipmaxy;
212 u32 xxx6[2];
213 u32 fg;
214 u32 bg;
215 u32 alu;
216 u32 pm;
217 u32 pixelm;
218 u32 xxx7[2];
219 u32 patalign;
220 u32 pattern[8];
221 u32 xxx8[432];
222 u32 apointx, apointy, apointz;
223 u32 xxx9[1];
224 u32 rpointx, rpointy, rpointz;
225 u32 xxx10[5];
226 u32 pointr, pointg, pointb, pointa;
227 u32 alinex, aliney, alinez;
228 u32 xxx11[1];
229 u32 rlinex, rliney, rlinez;
230 u32 xxx12[5];
231 u32 liner, lineg, lineb, linea;
232 u32 atrix, atriy, atriz;
233 u32 xxx13[1];
234 u32 rtrix, rtriy, rtriz;
235 u32 xxx14[5];
236 u32 trir, trig, trib, tria;
237 u32 aquadx, aquady, aquadz;
238 u32 xxx15[1];
239 u32 rquadx, rquady, rquadz;
240 u32 xxx16[5];
241 u32 quadr, quadg, quadb, quada;
242 u32 arectx, arecty, arectz;
243 u32 xxx17[1];
244 u32 rrectx, rrecty, rrectz;
245 u32 xxx18[5];
246 u32 rectr, rectg, rectb, recta;
247 };
248
249 struct bt_regs {
250 u32 addr;
251 u32 color_map;
252 u32 control;
253 u32 cursor;
254 };
255
256 struct cg6_par {
257 spinlock_t lock;
258 struct bt_regs __iomem *bt;
259 struct cg6_fbc __iomem *fbc;
260 struct cg6_thc __iomem *thc;
261 struct cg6_tec __iomem *tec;
262 u32 __iomem *fhc;
263
264 u32 flags;
265 #define CG6_FLAG_BLANKED 0x00000001
266
267 unsigned long which_io;
268 };
269
cg6_sync(struct fb_info * info)270 static int cg6_sync(struct fb_info *info)
271 {
272 struct cg6_par *par = (struct cg6_par *)info->par;
273 struct cg6_fbc __iomem *fbc = par->fbc;
274 int limit = 10000;
275
276 do {
277 if (!(sbus_readl(&fbc->s) & 0x10000000))
278 break;
279 udelay(10);
280 } while (--limit > 0);
281
282 return 0;
283 }
284
cg6_switch_from_graph(struct cg6_par * par)285 static void cg6_switch_from_graph(struct cg6_par *par)
286 {
287 struct cg6_thc __iomem *thc = par->thc;
288 unsigned long flags;
289
290 spin_lock_irqsave(&par->lock, flags);
291
292 /* Hide the cursor. */
293 sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
294
295 spin_unlock_irqrestore(&par->lock, flags);
296 }
297
cg6_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)298 static int cg6_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
299 {
300 struct cg6_par *par = (struct cg6_par *)info->par;
301
302 /* We just use this to catch switches out of
303 * graphics mode.
304 */
305 cg6_switch_from_graph(par);
306
307 if (var->xoffset || var->yoffset || var->vmode)
308 return -EINVAL;
309 return 0;
310 }
311
312 /**
313 * cg6_fillrect - Draws a rectangle on the screen.
314 *
315 * @info: frame buffer structure that represents a single frame buffer
316 * @rect: structure defining the rectagle and operation.
317 */
cg6_fillrect(struct fb_info * info,const struct fb_fillrect * rect)318 static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
319 {
320 struct cg6_par *par = (struct cg6_par *)info->par;
321 struct cg6_fbc __iomem *fbc = par->fbc;
322 unsigned long flags;
323 s32 val;
324
325 /* CG6 doesn't handle ROP_XOR */
326
327 spin_lock_irqsave(&par->lock, flags);
328
329 cg6_sync(info);
330
331 sbus_writel(rect->color, &fbc->fg);
332 sbus_writel(~(u32)0, &fbc->pixelm);
333 sbus_writel(0xea80ff00, &fbc->alu);
334 sbus_writel(0, &fbc->s);
335 sbus_writel(0, &fbc->clip);
336 sbus_writel(~(u32)0, &fbc->pm);
337 sbus_writel(rect->dy, &fbc->arecty);
338 sbus_writel(rect->dx, &fbc->arectx);
339 sbus_writel(rect->dy + rect->height, &fbc->arecty);
340 sbus_writel(rect->dx + rect->width, &fbc->arectx);
341 do {
342 val = sbus_readl(&fbc->draw);
343 } while (val < 0 && (val & 0x20000000));
344 spin_unlock_irqrestore(&par->lock, flags);
345 }
346
347 /**
348 * cg6_copyarea - Copies one area of the screen to another area.
349 *
350 * @info: frame buffer structure that represents a single frame buffer
351 * @area: Structure providing the data to copy the framebuffer contents
352 * from one region to another.
353 *
354 * This drawing operation copies a rectangular area from one area of the
355 * screen to another area.
356 */
cg6_copyarea(struct fb_info * info,const struct fb_copyarea * area)357 static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area)
358 {
359 struct cg6_par *par = (struct cg6_par *)info->par;
360 struct cg6_fbc __iomem *fbc = par->fbc;
361 unsigned long flags;
362 int i;
363
364 spin_lock_irqsave(&par->lock, flags);
365
366 cg6_sync(info);
367
368 sbus_writel(0xff, &fbc->fg);
369 sbus_writel(0x00, &fbc->bg);
370 sbus_writel(~0, &fbc->pixelm);
371 sbus_writel(0xe880cccc, &fbc->alu);
372 sbus_writel(0, &fbc->s);
373 sbus_writel(0, &fbc->clip);
374
375 sbus_writel(area->sy, &fbc->y0);
376 sbus_writel(area->sx, &fbc->x0);
377 sbus_writel(area->sy + area->height - 1, &fbc->y1);
378 sbus_writel(area->sx + area->width - 1, &fbc->x1);
379 sbus_writel(area->dy, &fbc->y2);
380 sbus_writel(area->dx, &fbc->x2);
381 sbus_writel(area->dy + area->height - 1, &fbc->y3);
382 sbus_writel(area->dx + area->width - 1, &fbc->x3);
383 do {
384 i = sbus_readl(&fbc->blit);
385 } while (i < 0 && (i & 0x20000000));
386 spin_unlock_irqrestore(&par->lock, flags);
387 }
388
389 /**
390 * cg6_imageblit - Copies a image from system memory to the screen.
391 *
392 * @info: frame buffer structure that represents a single frame buffer
393 * @image: structure defining the image.
394 */
cg6_imageblit(struct fb_info * info,const struct fb_image * image)395 static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
396 {
397 struct cg6_par *par = (struct cg6_par *)info->par;
398 struct cg6_fbc __iomem *fbc = par->fbc;
399 const u8 *data = image->data;
400 unsigned long flags;
401 u32 x, y;
402 int i, width;
403
404 if (image->depth > 1) {
405 cfb_imageblit(info, image);
406 return;
407 }
408
409 spin_lock_irqsave(&par->lock, flags);
410
411 cg6_sync(info);
412
413 sbus_writel(image->fg_color, &fbc->fg);
414 sbus_writel(image->bg_color, &fbc->bg);
415 sbus_writel(0x140000, &fbc->mode);
416 sbus_writel(0xe880fc30, &fbc->alu);
417 sbus_writel(~(u32)0, &fbc->pixelm);
418 sbus_writel(0, &fbc->s);
419 sbus_writel(0, &fbc->clip);
420 sbus_writel(0xff, &fbc->pm);
421 sbus_writel(32, &fbc->incx);
422 sbus_writel(0, &fbc->incy);
423
424 x = image->dx;
425 y = image->dy;
426 for (i = 0; i < image->height; i++) {
427 width = image->width;
428
429 while (width >= 32) {
430 u32 val;
431
432 sbus_writel(y, &fbc->y0);
433 sbus_writel(x, &fbc->x0);
434 sbus_writel(x + 32 - 1, &fbc->x1);
435
436 val = ((u32)data[0] << 24) |
437 ((u32)data[1] << 16) |
438 ((u32)data[2] << 8) |
439 ((u32)data[3] << 0);
440 sbus_writel(val, &fbc->font);
441
442 data += 4;
443 x += 32;
444 width -= 32;
445 }
446 if (width) {
447 u32 val;
448
449 sbus_writel(y, &fbc->y0);
450 sbus_writel(x, &fbc->x0);
451 sbus_writel(x + width - 1, &fbc->x1);
452 if (width <= 8) {
453 val = (u32) data[0] << 24;
454 data += 1;
455 } else if (width <= 16) {
456 val = ((u32) data[0] << 24) |
457 ((u32) data[1] << 16);
458 data += 2;
459 } else {
460 val = ((u32) data[0] << 24) |
461 ((u32) data[1] << 16) |
462 ((u32) data[2] << 8);
463 data += 3;
464 }
465 sbus_writel(val, &fbc->font);
466 }
467
468 y += 1;
469 x = image->dx;
470 }
471
472 spin_unlock_irqrestore(&par->lock, flags);
473 }
474
475 /**
476 * cg6_setcolreg - Sets a color register.
477 *
478 * @regno: boolean, 0 copy local, 1 get_user() function
479 * @red: frame buffer colormap structure
480 * @green: The green value which can be up to 16 bits wide
481 * @blue: The blue value which can be up to 16 bits wide.
482 * @transp: If supported the alpha value which can be up to 16 bits wide.
483 * @info: frame buffer info structure
484 */
cg6_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)485 static int cg6_setcolreg(unsigned regno,
486 unsigned red, unsigned green, unsigned blue,
487 unsigned transp, struct fb_info *info)
488 {
489 struct cg6_par *par = (struct cg6_par *)info->par;
490 struct bt_regs __iomem *bt = par->bt;
491 unsigned long flags;
492
493 if (regno >= 256)
494 return 1;
495
496 red >>= 8;
497 green >>= 8;
498 blue >>= 8;
499
500 spin_lock_irqsave(&par->lock, flags);
501
502 sbus_writel((u32)regno << 24, &bt->addr);
503 sbus_writel((u32)red << 24, &bt->color_map);
504 sbus_writel((u32)green << 24, &bt->color_map);
505 sbus_writel((u32)blue << 24, &bt->color_map);
506
507 spin_unlock_irqrestore(&par->lock, flags);
508
509 return 0;
510 }
511
512 /**
513 * cg6_blank - Blanks the display.
514 *
515 * @blank: the blank mode we want.
516 * @info: frame buffer structure that represents a single frame buffer
517 */
cg6_blank(int blank,struct fb_info * info)518 static int cg6_blank(int blank, struct fb_info *info)
519 {
520 struct cg6_par *par = (struct cg6_par *)info->par;
521 struct cg6_thc __iomem *thc = par->thc;
522 unsigned long flags;
523 u32 val;
524
525 spin_lock_irqsave(&par->lock, flags);
526 val = sbus_readl(&thc->thc_misc);
527
528 switch (blank) {
529 case FB_BLANK_UNBLANK: /* Unblanking */
530 val |= CG6_THC_MISC_VIDEO;
531 par->flags &= ~CG6_FLAG_BLANKED;
532 break;
533
534 case FB_BLANK_NORMAL: /* Normal blanking */
535 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
536 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
537 case FB_BLANK_POWERDOWN: /* Poweroff */
538 val &= ~CG6_THC_MISC_VIDEO;
539 par->flags |= CG6_FLAG_BLANKED;
540 break;
541 }
542
543 sbus_writel(val, &thc->thc_misc);
544 spin_unlock_irqrestore(&par->lock, flags);
545
546 return 0;
547 }
548
549 static struct sbus_mmap_map cg6_mmap_map[] = {
550 {
551 .voff = CG6_FBC,
552 .poff = CG6_FBC_OFFSET,
553 .size = PAGE_SIZE
554 },
555 {
556 .voff = CG6_TEC,
557 .poff = CG6_TEC_OFFSET,
558 .size = PAGE_SIZE
559 },
560 {
561 .voff = CG6_BTREGS,
562 .poff = CG6_BROOKTREE_OFFSET,
563 .size = PAGE_SIZE
564 },
565 {
566 .voff = CG6_FHC,
567 .poff = CG6_FHC_OFFSET,
568 .size = PAGE_SIZE
569 },
570 {
571 .voff = CG6_THC,
572 .poff = CG6_THC_OFFSET,
573 .size = PAGE_SIZE
574 },
575 {
576 .voff = CG6_ROM,
577 .poff = CG6_ROM_OFFSET,
578 .size = 0x10000
579 },
580 {
581 .voff = CG6_RAM,
582 .poff = CG6_RAM_OFFSET,
583 .size = SBUS_MMAP_FBSIZE(1)
584 },
585 {
586 .voff = CG6_DHC,
587 .poff = CG6_DHC_OFFSET,
588 .size = 0x40000
589 },
590 { .size = 0 }
591 };
592
cg6_mmap(struct fb_info * info,struct vm_area_struct * vma)593 static int cg6_mmap(struct fb_info *info, struct vm_area_struct *vma)
594 {
595 struct cg6_par *par = (struct cg6_par *)info->par;
596
597 return sbusfb_mmap_helper(cg6_mmap_map,
598 info->fix.smem_start, info->fix.smem_len,
599 par->which_io, vma);
600 }
601
cg6_ioctl(struct fb_info * info,unsigned int cmd,unsigned long arg)602 static int cg6_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
603 {
604 return sbusfb_ioctl_helper(cmd, arg, info,
605 FBTYPE_SUNFAST_COLOR, 8, info->fix.smem_len);
606 }
607
608 /*
609 * Initialisation
610 */
611
cg6_init_fix(struct fb_info * info,int linebytes)612 static void cg6_init_fix(struct fb_info *info, int linebytes)
613 {
614 struct cg6_par *par = (struct cg6_par *)info->par;
615 const char *cg6_cpu_name, *cg6_card_name;
616 u32 conf;
617
618 conf = sbus_readl(par->fhc);
619 switch (conf & CG6_FHC_CPU_MASK) {
620 case CG6_FHC_CPU_SPARC:
621 cg6_cpu_name = "sparc";
622 break;
623 case CG6_FHC_CPU_68020:
624 cg6_cpu_name = "68020";
625 break;
626 default:
627 cg6_cpu_name = "i386";
628 break;
629 }
630 if (((conf >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK) >= 11) {
631 if (info->fix.smem_len <= 0x100000)
632 cg6_card_name = "TGX";
633 else
634 cg6_card_name = "TGX+";
635 } else {
636 if (info->fix.smem_len <= 0x100000)
637 cg6_card_name = "GX";
638 else
639 cg6_card_name = "GX+";
640 }
641
642 sprintf(info->fix.id, "%s %s", cg6_card_name, cg6_cpu_name);
643 info->fix.id[sizeof(info->fix.id) - 1] = 0;
644
645 info->fix.type = FB_TYPE_PACKED_PIXELS;
646 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
647
648 info->fix.line_length = linebytes;
649
650 info->fix.accel = FB_ACCEL_SUN_CGSIX;
651 }
652
653 /* Initialize Brooktree DAC */
cg6_bt_init(struct cg6_par * par)654 static void cg6_bt_init(struct cg6_par *par)
655 {
656 struct bt_regs __iomem *bt = par->bt;
657
658 sbus_writel(0x04 << 24, &bt->addr); /* color planes */
659 sbus_writel(0xff << 24, &bt->control);
660 sbus_writel(0x05 << 24, &bt->addr);
661 sbus_writel(0x00 << 24, &bt->control);
662 sbus_writel(0x06 << 24, &bt->addr); /* overlay plane */
663 sbus_writel(0x73 << 24, &bt->control);
664 sbus_writel(0x07 << 24, &bt->addr);
665 sbus_writel(0x00 << 24, &bt->control);
666 }
667
cg6_chip_init(struct fb_info * info)668 static void cg6_chip_init(struct fb_info *info)
669 {
670 struct cg6_par *par = (struct cg6_par *)info->par;
671 struct cg6_tec __iomem *tec = par->tec;
672 struct cg6_fbc __iomem *fbc = par->fbc;
673 struct cg6_thc __iomem *thc = par->thc;
674 u32 rev, conf, mode;
675 int i;
676
677 /* Hide the cursor. */
678 sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
679
680 /* Turn off stuff in the Transform Engine. */
681 sbus_writel(0, &tec->tec_matrix);
682 sbus_writel(0, &tec->tec_clip);
683 sbus_writel(0, &tec->tec_vdc);
684
685 /* Take care of bugs in old revisions. */
686 rev = (sbus_readl(par->fhc) >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK;
687 if (rev < 5) {
688 conf = (sbus_readl(par->fhc) & CG6_FHC_RES_MASK) |
689 CG6_FHC_CPU_68020 | CG6_FHC_TEST |
690 (11 << CG6_FHC_TEST_X_SHIFT) |
691 (11 << CG6_FHC_TEST_Y_SHIFT);
692 if (rev < 2)
693 conf |= CG6_FHC_DST_DISABLE;
694 sbus_writel(conf, par->fhc);
695 }
696
697 /* Set things in the FBC. Bad things appear to happen if we do
698 * back to back store/loads on the mode register, so copy it
699 * out instead. */
700 mode = sbus_readl(&fbc->mode);
701 do {
702 i = sbus_readl(&fbc->s);
703 } while (i & 0x10000000);
704 mode &= ~(CG6_FBC_BLIT_MASK | CG6_FBC_MODE_MASK |
705 CG6_FBC_DRAW_MASK | CG6_FBC_BWRITE0_MASK |
706 CG6_FBC_BWRITE1_MASK | CG6_FBC_BREAD_MASK |
707 CG6_FBC_BDISP_MASK);
708 mode |= (CG6_FBC_BLIT_SRC | CG6_FBC_MODE_COLOR8 |
709 CG6_FBC_DRAW_RENDER | CG6_FBC_BWRITE0_ENABLE |
710 CG6_FBC_BWRITE1_DISABLE | CG6_FBC_BREAD_0 |
711 CG6_FBC_BDISP_0);
712 sbus_writel(mode, &fbc->mode);
713
714 sbus_writel(0, &fbc->clip);
715 sbus_writel(0, &fbc->offx);
716 sbus_writel(0, &fbc->offy);
717 sbus_writel(0, &fbc->clipminx);
718 sbus_writel(0, &fbc->clipminy);
719 sbus_writel(info->var.xres - 1, &fbc->clipmaxx);
720 sbus_writel(info->var.yres - 1, &fbc->clipmaxy);
721 }
722
cg6_unmap_regs(struct platform_device * op,struct fb_info * info,struct cg6_par * par)723 static void cg6_unmap_regs(struct platform_device *op, struct fb_info *info,
724 struct cg6_par *par)
725 {
726 if (par->fbc)
727 of_iounmap(&op->resource[0], par->fbc, 4096);
728 if (par->tec)
729 of_iounmap(&op->resource[0], par->tec, sizeof(struct cg6_tec));
730 if (par->thc)
731 of_iounmap(&op->resource[0], par->thc, sizeof(struct cg6_thc));
732 if (par->bt)
733 of_iounmap(&op->resource[0], par->bt, sizeof(struct bt_regs));
734 if (par->fhc)
735 of_iounmap(&op->resource[0], par->fhc, sizeof(u32));
736
737 if (info->screen_base)
738 of_iounmap(&op->resource[0], info->screen_base,
739 info->fix.smem_len);
740 }
741
cg6_probe(struct platform_device * op)742 static int cg6_probe(struct platform_device *op)
743 {
744 struct device_node *dp = op->dev.of_node;
745 struct fb_info *info;
746 struct cg6_par *par;
747 int linebytes, err;
748 int dblbuf;
749
750 info = framebuffer_alloc(sizeof(struct cg6_par), &op->dev);
751
752 err = -ENOMEM;
753 if (!info)
754 goto out_err;
755 par = info->par;
756
757 spin_lock_init(&par->lock);
758
759 info->fix.smem_start = op->resource[0].start;
760 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
761
762 sbusfb_fill_var(&info->var, dp, 8);
763 info->var.red.length = 8;
764 info->var.green.length = 8;
765 info->var.blue.length = 8;
766
767 linebytes = of_getintprop_default(dp, "linebytes",
768 info->var.xres);
769 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
770
771 dblbuf = of_getintprop_default(dp, "dblbuf", 0);
772 if (dblbuf)
773 info->fix.smem_len *= 4;
774
775 par->fbc = of_ioremap(&op->resource[0], CG6_FBC_OFFSET,
776 4096, "cgsix fbc");
777 par->tec = of_ioremap(&op->resource[0], CG6_TEC_OFFSET,
778 sizeof(struct cg6_tec), "cgsix tec");
779 par->thc = of_ioremap(&op->resource[0], CG6_THC_OFFSET,
780 sizeof(struct cg6_thc), "cgsix thc");
781 par->bt = of_ioremap(&op->resource[0], CG6_BROOKTREE_OFFSET,
782 sizeof(struct bt_regs), "cgsix dac");
783 par->fhc = of_ioremap(&op->resource[0], CG6_FHC_OFFSET,
784 sizeof(u32), "cgsix fhc");
785
786 info->flags = FBINFO_HWACCEL_IMAGEBLIT |
787 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
788 FBINFO_READS_FAST;
789 info->fbops = &cg6_ops;
790
791 info->screen_base = of_ioremap(&op->resource[0], CG6_RAM_OFFSET,
792 info->fix.smem_len, "cgsix ram");
793 if (!par->fbc || !par->tec || !par->thc ||
794 !par->bt || !par->fhc || !info->screen_base)
795 goto out_unmap_regs;
796
797 info->var.accel_flags = FB_ACCELF_TEXT;
798
799 cg6_bt_init(par);
800 cg6_chip_init(info);
801 cg6_blank(FB_BLANK_UNBLANK, info);
802
803 if (fb_alloc_cmap(&info->cmap, 256, 0))
804 goto out_unmap_regs;
805
806 fb_set_cmap(&info->cmap, info);
807 cg6_init_fix(info, linebytes);
808
809 err = register_framebuffer(info);
810 if (err < 0)
811 goto out_dealloc_cmap;
812
813 dev_set_drvdata(&op->dev, info);
814
815 printk(KERN_INFO "%pOF: CGsix [%s] at %lx:%lx\n",
816 dp, info->fix.id,
817 par->which_io, info->fix.smem_start);
818
819 return 0;
820
821 out_dealloc_cmap:
822 fb_dealloc_cmap(&info->cmap);
823
824 out_unmap_regs:
825 cg6_unmap_regs(op, info, par);
826 framebuffer_release(info);
827
828 out_err:
829 return err;
830 }
831
cg6_remove(struct platform_device * op)832 static void cg6_remove(struct platform_device *op)
833 {
834 struct fb_info *info = dev_get_drvdata(&op->dev);
835 struct cg6_par *par = info->par;
836
837 unregister_framebuffer(info);
838 fb_dealloc_cmap(&info->cmap);
839
840 cg6_unmap_regs(op, info, par);
841
842 framebuffer_release(info);
843 }
844
845 static const struct of_device_id cg6_match[] = {
846 {
847 .name = "cgsix",
848 },
849 {
850 .name = "cgthree+",
851 },
852 {},
853 };
854 MODULE_DEVICE_TABLE(of, cg6_match);
855
856 static struct platform_driver cg6_driver = {
857 .driver = {
858 .name = "cg6",
859 .of_match_table = cg6_match,
860 },
861 .probe = cg6_probe,
862 .remove_new = cg6_remove,
863 };
864
cg6_init(void)865 static int __init cg6_init(void)
866 {
867 if (fb_get_options("cg6fb", NULL))
868 return -ENODEV;
869
870 return platform_driver_register(&cg6_driver);
871 }
872
cg6_exit(void)873 static void __exit cg6_exit(void)
874 {
875 platform_driver_unregister(&cg6_driver);
876 }
877
878 module_init(cg6_init);
879 module_exit(cg6_exit);
880
881 MODULE_DESCRIPTION("framebuffer driver for CGsix chipsets");
882 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
883 MODULE_VERSION("2.0");
884 MODULE_LICENSE("GPL");
885