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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 ([email protected])
5 * Copyright (C) 1996,1998 Jakub Jelinek ([email protected])
6 * Copyright (C) 1996 Miguel de Icaza ([email protected])
7 * Copyright (C) 1996 Eddie C. Dost ([email protected])
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
32static int cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
33 unsigned, struct fb_info *);
34static int cg6_blank(int, struct fb_info *);
35
36static void cg6_imageblit(struct fb_info *, const struct fb_image *);
37static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
38static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
39static int cg6_sync(struct fb_info *);
40static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
41
42static int cg6_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);
43static int cg6_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg);
44
45/*
46 * Frame buffer operations
47 */
48
49static const struct fb_ops cg6_ops = {
50 .owner = THIS_MODULE,
51 __FB_DEFAULT_SBUS_OPS_RDWR(cg6),
52 .fb_setcolreg = cg6_setcolreg,
53 .fb_blank = cg6_blank,
54 .fb_pan_display = cg6_pan_display,
55 .fb_fillrect = cg6_fillrect,
56 .fb_copyarea = cg6_copyarea,
57 .fb_imageblit = cg6_imageblit,
58 .fb_sync = cg6_sync,
59 __FB_DEFAULT_SBUS_OPS_IOCTL(cg6),
60 __FB_DEFAULT_SBUS_OPS_MMAP(cg6),
61};
62
63/* Offset of interesting structures in the OBIO space */
64/*
65 * Brooktree is the video dac and is funny to program on the cg6.
66 * (it's even funnier on the cg3)
67 * The FBC could be the frame buffer control
68 * The FHC could is the frame buffer hardware control.
69 */
70#define CG6_ROM_OFFSET 0x0UL
71#define CG6_BROOKTREE_OFFSET 0x200000UL
72#define CG6_DHC_OFFSET 0x240000UL
73#define CG6_ALT_OFFSET 0x280000UL
74#define CG6_FHC_OFFSET 0x300000UL
75#define CG6_THC_OFFSET 0x301000UL
76#define CG6_FBC_OFFSET 0x700000UL
77#define CG6_TEC_OFFSET 0x701000UL
78#define CG6_RAM_OFFSET 0x800000UL
79
80/* FHC definitions */
81#define CG6_FHC_FBID_SHIFT 24
82#define CG6_FHC_FBID_MASK 255
83#define CG6_FHC_REV_SHIFT 20
84#define CG6_FHC_REV_MASK 15
85#define CG6_FHC_FROP_DISABLE (1 << 19)
86#define CG6_FHC_ROW_DISABLE (1 << 18)
87#define CG6_FHC_SRC_DISABLE (1 << 17)
88#define CG6_FHC_DST_DISABLE (1 << 16)
89#define CG6_FHC_RESET (1 << 15)
90#define CG6_FHC_LITTLE_ENDIAN (1 << 13)
91#define CG6_FHC_RES_MASK (3 << 11)
92#define CG6_FHC_1024 (0 << 11)
93#define CG6_FHC_1152 (1 << 11)
94#define CG6_FHC_1280 (2 << 11)
95#define CG6_FHC_1600 (3 << 11)
96#define CG6_FHC_CPU_MASK (3 << 9)
97#define CG6_FHC_CPU_SPARC (0 << 9)
98#define CG6_FHC_CPU_68020 (1 << 9)
99#define CG6_FHC_CPU_386 (2 << 9)
100#define CG6_FHC_TEST (1 << 8)
101#define CG6_FHC_TEST_X_SHIFT 4
102#define CG6_FHC_TEST_X_MASK 15
103#define CG6_FHC_TEST_Y_SHIFT 0
104#define CG6_FHC_TEST_Y_MASK 15
105
106/* FBC mode definitions */
107#define CG6_FBC_BLIT_IGNORE 0x00000000
108#define CG6_FBC_BLIT_NOSRC 0x00100000
109#define CG6_FBC_BLIT_SRC 0x00200000
110#define CG6_FBC_BLIT_ILLEGAL 0x00300000
111#define CG6_FBC_BLIT_MASK 0x00300000
112
113#define CG6_FBC_VBLANK 0x00080000
114
115#define CG6_FBC_MODE_IGNORE 0x00000000
116#define CG6_FBC_MODE_COLOR8 0x00020000
117#define CG6_FBC_MODE_COLOR1 0x00040000
118#define CG6_FBC_MODE_HRMONO 0x00060000
119#define CG6_FBC_MODE_MASK 0x00060000
120
121#define CG6_FBC_DRAW_IGNORE 0x00000000
122#define CG6_FBC_DRAW_RENDER 0x00008000
123#define CG6_FBC_DRAW_PICK 0x00010000
124#define CG6_FBC_DRAW_ILLEGAL 0x00018000
125#define CG6_FBC_DRAW_MASK 0x00018000
126
127#define CG6_FBC_BWRITE0_IGNORE 0x00000000
128#define CG6_FBC_BWRITE0_ENABLE 0x00002000
129#define CG6_FBC_BWRITE0_DISABLE 0x00004000
130#define CG6_FBC_BWRITE0_ILLEGAL 0x00006000
131#define CG6_FBC_BWRITE0_MASK 0x00006000
132
133#define CG6_FBC_BWRITE1_IGNORE 0x00000000
134#define CG6_FBC_BWRITE1_ENABLE 0x00000800
135#define CG6_FBC_BWRITE1_DISABLE 0x00001000
136#define CG6_FBC_BWRITE1_ILLEGAL 0x00001800
137#define CG6_FBC_BWRITE1_MASK 0x00001800
138
139#define CG6_FBC_BREAD_IGNORE 0x00000000
140#define CG6_FBC_BREAD_0 0x00000200
141#define CG6_FBC_BREAD_1 0x00000400
142#define CG6_FBC_BREAD_ILLEGAL 0x00000600
143#define CG6_FBC_BREAD_MASK 0x00000600
144
145#define CG6_FBC_BDISP_IGNORE 0x00000000
146#define CG6_FBC_BDISP_0 0x00000080
147#define CG6_FBC_BDISP_1 0x00000100
148#define CG6_FBC_BDISP_ILLEGAL 0x00000180
149#define CG6_FBC_BDISP_MASK 0x00000180
150
151#define CG6_FBC_INDEX_MOD 0x00000040
152#define CG6_FBC_INDEX_MASK 0x00000030
153
154/* THC definitions */
155#define CG6_THC_MISC_REV_SHIFT 16
156#define CG6_THC_MISC_REV_MASK 15
157#define CG6_THC_MISC_RESET (1 << 12)
158#define CG6_THC_MISC_VIDEO (1 << 10)
159#define CG6_THC_MISC_SYNC (1 << 9)
160#define CG6_THC_MISC_VSYNC (1 << 8)
161#define CG6_THC_MISC_SYNC_ENAB (1 << 7)
162#define CG6_THC_MISC_CURS_RES (1 << 6)
163#define CG6_THC_MISC_INT_ENAB (1 << 5)
164#define CG6_THC_MISC_INT (1 << 4)
165#define CG6_THC_MISC_INIT 0x9f
166#define CG6_THC_CURSOFF ((65536-32) | ((65536-32) << 16))
167
168/* The contents are unknown */
169struct cg6_tec {
170 int tec_matrix;
171 int tec_clip;
172 int tec_vdc;
173};
174
175struct cg6_thc {
176 u32 thc_pad0[512];
177 u32 thc_hs; /* hsync timing */
178 u32 thc_hsdvs;
179 u32 thc_hd;
180 u32 thc_vs; /* vsync timing */
181 u32 thc_vd;
182 u32 thc_refresh;
183 u32 thc_misc;
184 u32 thc_pad1[56];
185 u32 thc_cursxy; /* cursor x,y position (16 bits each) */
186 u32 thc_cursmask[32]; /* cursor mask bits */
187 u32 thc_cursbits[32]; /* what to show where mask enabled */
188};
189
190struct cg6_fbc {
191 u32 xxx0[1];
192 u32 mode;
193 u32 clip;
194 u32 xxx1[1];
195 u32 s;
196 u32 draw;
197 u32 blit;
198 u32 font;
199 u32 xxx2[24];
200 u32 x0, y0, z0, color0;
201 u32 x1, y1, z1, color1;
202 u32 x2, y2, z2, color2;
203 u32 x3, y3, z3, color3;
204 u32 offx, offy;
205 u32 xxx3[2];
206 u32 incx, incy;
207 u32 xxx4[2];
208 u32 clipminx, clipminy;
209 u32 xxx5[2];
210 u32 clipmaxx, clipmaxy;
211 u32 xxx6[2];
212 u32 fg;
213 u32 bg;
214 u32 alu;
215 u32 pm;
216 u32 pixelm;
217 u32 xxx7[2];
218 u32 patalign;
219 u32 pattern[8];
220 u32 xxx8[432];
221 u32 apointx, apointy, apointz;
222 u32 xxx9[1];
223 u32 rpointx, rpointy, rpointz;
224 u32 xxx10[5];
225 u32 pointr, pointg, pointb, pointa;
226 u32 alinex, aliney, alinez;
227 u32 xxx11[1];
228 u32 rlinex, rliney, rlinez;
229 u32 xxx12[5];
230 u32 liner, lineg, lineb, linea;
231 u32 atrix, atriy, atriz;
232 u32 xxx13[1];
233 u32 rtrix, rtriy, rtriz;
234 u32 xxx14[5];
235 u32 trir, trig, trib, tria;
236 u32 aquadx, aquady, aquadz;
237 u32 xxx15[1];
238 u32 rquadx, rquady, rquadz;
239 u32 xxx16[5];
240 u32 quadr, quadg, quadb, quada;
241 u32 arectx, arecty, arectz;
242 u32 xxx17[1];
243 u32 rrectx, rrecty, rrectz;
244 u32 xxx18[5];
245 u32 rectr, rectg, rectb, recta;
246};
247
248struct bt_regs {
249 u32 addr;
250 u32 color_map;
251 u32 control;
252 u32 cursor;
253};
254
255struct cg6_par {
256 spinlock_t lock;
257 struct bt_regs __iomem *bt;
258 struct cg6_fbc __iomem *fbc;
259 struct cg6_thc __iomem *thc;
260 struct cg6_tec __iomem *tec;
261 u32 __iomem *fhc;
262
263 u32 flags;
264#define CG6_FLAG_BLANKED 0x00000001
265
266 unsigned long which_io;
267};
268
269static int cg6_sync(struct fb_info *info)
270{
271 struct cg6_par *par = (struct cg6_par *)info->par;
272 struct cg6_fbc __iomem *fbc = par->fbc;
273 int limit = 10000;
274
275 do {
276 if (!(sbus_readl(&fbc->s) & 0x10000000))
277 break;
278 udelay(10);
279 } while (--limit > 0);
280
281 return 0;
282}
283
284static void cg6_switch_from_graph(struct cg6_par *par)
285{
286 struct cg6_thc __iomem *thc = par->thc;
287 unsigned long flags;
288
289 spin_lock_irqsave(&par->lock, flags);
290
291 /* Hide the cursor. */
292 sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
293
294 spin_unlock_irqrestore(&par->lock, flags);
295}
296
297static int cg6_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
298{
299 struct cg6_par *par = (struct cg6_par *)info->par;
300
301 /* We just use this to catch switches out of
302 * graphics mode.
303 */
304 cg6_switch_from_graph(par);
305
306 if (var->xoffset || var->yoffset || var->vmode)
307 return -EINVAL;
308 return 0;
309}
310
311/**
312 * cg6_fillrect - Draws a rectangle on the screen.
313 *
314 * @info: frame buffer structure that represents a single frame buffer
315 * @rect: structure defining the rectagle and operation.
316 */
317static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
318{
319 struct cg6_par *par = (struct cg6_par *)info->par;
320 struct cg6_fbc __iomem *fbc = par->fbc;
321 unsigned long flags;
322 s32 val;
323
324 /* CG6 doesn't handle ROP_XOR */
325
326 spin_lock_irqsave(&par->lock, flags);
327
328 cg6_sync(info);
329
330 sbus_writel(rect->color, &fbc->fg);
331 sbus_writel(~(u32)0, &fbc->pixelm);
332 sbus_writel(0xea80ff00, &fbc->alu);
333 sbus_writel(0, &fbc->s);
334 sbus_writel(0, &fbc->clip);
335 sbus_writel(~(u32)0, &fbc->pm);
336 sbus_writel(rect->dy, &fbc->arecty);
337 sbus_writel(rect->dx, &fbc->arectx);
338 sbus_writel(rect->dy + rect->height, &fbc->arecty);
339 sbus_writel(rect->dx + rect->width, &fbc->arectx);
340 do {
341 val = sbus_readl(&fbc->draw);
342 } while (val < 0 && (val & 0x20000000));
343 spin_unlock_irqrestore(&par->lock, flags);
344}
345
346/**
347 * cg6_copyarea - Copies one area of the screen to another area.
348 *
349 * @info: frame buffer structure that represents a single frame buffer
350 * @area: Structure providing the data to copy the framebuffer contents
351 * from one region to another.
352 *
353 * This drawing operation copies a rectangular area from one area of the
354 * screen to another area.
355 */
356static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area)
357{
358 struct cg6_par *par = (struct cg6_par *)info->par;
359 struct cg6_fbc __iomem *fbc = par->fbc;
360 unsigned long flags;
361 int i;
362
363 spin_lock_irqsave(&par->lock, flags);
364
365 cg6_sync(info);
366
367 sbus_writel(0xff, &fbc->fg);
368 sbus_writel(0x00, &fbc->bg);
369 sbus_writel(~0, &fbc->pixelm);
370 sbus_writel(0xe880cccc, &fbc->alu);
371 sbus_writel(0, &fbc->s);
372 sbus_writel(0, &fbc->clip);
373
374 sbus_writel(area->sy, &fbc->y0);
375 sbus_writel(area->sx, &fbc->x0);
376 sbus_writel(area->sy + area->height - 1, &fbc->y1);
377 sbus_writel(area->sx + area->width - 1, &fbc->x1);
378 sbus_writel(area->dy, &fbc->y2);
379 sbus_writel(area->dx, &fbc->x2);
380 sbus_writel(area->dy + area->height - 1, &fbc->y3);
381 sbus_writel(area->dx + area->width - 1, &fbc->x3);
382 do {
383 i = sbus_readl(&fbc->blit);
384 } while (i < 0 && (i & 0x20000000));
385 spin_unlock_irqrestore(&par->lock, flags);
386}
387
388/**
389 * cg6_imageblit - Copies a image from system memory to the screen.
390 *
391 * @info: frame buffer structure that represents a single frame buffer
392 * @image: structure defining the image.
393 */
394static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
395{
396 struct cg6_par *par = (struct cg6_par *)info->par;
397 struct cg6_fbc __iomem *fbc = par->fbc;
398 const u8 *data = image->data;
399 unsigned long flags;
400 u32 x, y;
401 int i, width;
402
403 if (image->depth > 1) {
404 cfb_imageblit(info, image);
405 return;
406 }
407
408 spin_lock_irqsave(&par->lock, flags);
409
410 cg6_sync(info);
411
412 sbus_writel(image->fg_color, &fbc->fg);
413 sbus_writel(image->bg_color, &fbc->bg);
414 sbus_writel(0x140000, &fbc->mode);
415 sbus_writel(0xe880fc30, &fbc->alu);
416 sbus_writel(~(u32)0, &fbc->pixelm);
417 sbus_writel(0, &fbc->s);
418 sbus_writel(0, &fbc->clip);
419 sbus_writel(0xff, &fbc->pm);
420 sbus_writel(32, &fbc->incx);
421 sbus_writel(0, &fbc->incy);
422
423 x = image->dx;
424 y = image->dy;
425 for (i = 0; i < image->height; i++) {
426 width = image->width;
427
428 while (width >= 32) {
429 u32 val;
430
431 sbus_writel(y, &fbc->y0);
432 sbus_writel(x, &fbc->x0);
433 sbus_writel(x + 32 - 1, &fbc->x1);
434
435 val = ((u32)data[0] << 24) |
436 ((u32)data[1] << 16) |
437 ((u32)data[2] << 8) |
438 ((u32)data[3] << 0);
439 sbus_writel(val, &fbc->font);
440
441 data += 4;
442 x += 32;
443 width -= 32;
444 }
445 if (width) {
446 u32 val;
447
448 sbus_writel(y, &fbc->y0);
449 sbus_writel(x, &fbc->x0);
450 sbus_writel(x + width - 1, &fbc->x1);
451 if (width <= 8) {
452 val = (u32) data[0] << 24;
453 data += 1;
454 } else if (width <= 16) {
455 val = ((u32) data[0] << 24) |
456 ((u32) data[1] << 16);
457 data += 2;
458 } else {
459 val = ((u32) data[0] << 24) |
460 ((u32) data[1] << 16) |
461 ((u32) data[2] << 8);
462 data += 3;
463 }
464 sbus_writel(val, &fbc->font);
465 }
466
467 y += 1;
468 x = image->dx;
469 }
470
471 spin_unlock_irqrestore(&par->lock, flags);
472}
473
474/**
475 * cg6_setcolreg - Sets a color register.
476 *
477 * @regno: boolean, 0 copy local, 1 get_user() function
478 * @red: frame buffer colormap structure
479 * @green: The green value which can be up to 16 bits wide
480 * @blue: The blue value which can be up to 16 bits wide.
481 * @transp: If supported the alpha value which can be up to 16 bits wide.
482 * @info: frame buffer info structure
483 */
484static int cg6_setcolreg(unsigned regno,
485 unsigned red, unsigned green, unsigned blue,
486 unsigned transp, struct fb_info *info)
487{
488 struct cg6_par *par = (struct cg6_par *)info->par;
489 struct bt_regs __iomem *bt = par->bt;
490 unsigned long flags;
491
492 if (regno >= 256)
493 return 1;
494
495 red >>= 8;
496 green >>= 8;
497 blue >>= 8;
498
499 spin_lock_irqsave(&par->lock, flags);
500
501 sbus_writel((u32)regno << 24, &bt->addr);
502 sbus_writel((u32)red << 24, &bt->color_map);
503 sbus_writel((u32)green << 24, &bt->color_map);
504 sbus_writel((u32)blue << 24, &bt->color_map);
505
506 spin_unlock_irqrestore(&par->lock, flags);
507
508 return 0;
509}
510
511/**
512 * cg6_blank - Blanks the display.
513 *
514 * @blank: the blank mode we want.
515 * @info: frame buffer structure that represents a single frame buffer
516 */
517static int cg6_blank(int blank, struct fb_info *info)
518{
519 struct cg6_par *par = (struct cg6_par *)info->par;
520 struct cg6_thc __iomem *thc = par->thc;
521 unsigned long flags;
522 u32 val;
523
524 spin_lock_irqsave(&par->lock, flags);
525 val = sbus_readl(&thc->thc_misc);
526
527 switch (blank) {
528 case FB_BLANK_UNBLANK: /* Unblanking */
529 val |= CG6_THC_MISC_VIDEO;
530 par->flags &= ~CG6_FLAG_BLANKED;
531 break;
532
533 case FB_BLANK_NORMAL: /* Normal blanking */
534 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
535 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
536 case FB_BLANK_POWERDOWN: /* Poweroff */
537 val &= ~CG6_THC_MISC_VIDEO;
538 par->flags |= CG6_FLAG_BLANKED;
539 break;
540 }
541
542 sbus_writel(val, &thc->thc_misc);
543 spin_unlock_irqrestore(&par->lock, flags);
544
545 return 0;
546}
547
548static const struct sbus_mmap_map cg6_mmap_map[] = {
549 {
550 .voff = CG6_FBC,
551 .poff = CG6_FBC_OFFSET,
552 .size = PAGE_SIZE
553 },
554 {
555 .voff = CG6_TEC,
556 .poff = CG6_TEC_OFFSET,
557 .size = PAGE_SIZE
558 },
559 {
560 .voff = CG6_BTREGS,
561 .poff = CG6_BROOKTREE_OFFSET,
562 .size = PAGE_SIZE
563 },
564 {
565 .voff = CG6_FHC,
566 .poff = CG6_FHC_OFFSET,
567 .size = PAGE_SIZE
568 },
569 {
570 .voff = CG6_THC,
571 .poff = CG6_THC_OFFSET,
572 .size = PAGE_SIZE
573 },
574 {
575 .voff = CG6_ROM,
576 .poff = CG6_ROM_OFFSET,
577 .size = 0x10000
578 },
579 {
580 .voff = CG6_RAM,
581 .poff = CG6_RAM_OFFSET,
582 .size = SBUS_MMAP_FBSIZE(1)
583 },
584 {
585 .voff = CG6_DHC,
586 .poff = CG6_DHC_OFFSET,
587 .size = 0x40000
588 },
589 { .size = 0 }
590};
591
592static int cg6_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
593{
594 struct cg6_par *par = (struct cg6_par *)info->par;
595
596 return sbusfb_mmap_helper(cg6_mmap_map,
597 info->fix.smem_start, info->fix.smem_len,
598 par->which_io, vma);
599}
600
601static int cg6_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
602{
603 return sbusfb_ioctl_helper(cmd, arg, info,
604 FBTYPE_SUNFAST_COLOR, 8, info->fix.smem_len);
605}
606
607/*
608 * Initialisation
609 */
610
611static void cg6_init_fix(struct fb_info *info, int linebytes)
612{
613 struct cg6_par *par = (struct cg6_par *)info->par;
614 const char *cg6_cpu_name, *cg6_card_name;
615 u32 conf;
616
617 conf = sbus_readl(par->fhc);
618 switch (conf & CG6_FHC_CPU_MASK) {
619 case CG6_FHC_CPU_SPARC:
620 cg6_cpu_name = "sparc";
621 break;
622 case CG6_FHC_CPU_68020:
623 cg6_cpu_name = "68020";
624 break;
625 default:
626 cg6_cpu_name = "i386";
627 break;
628 }
629 if (((conf >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK) >= 11) {
630 if (info->fix.smem_len <= 0x100000)
631 cg6_card_name = "TGX";
632 else
633 cg6_card_name = "TGX+";
634 } else {
635 if (info->fix.smem_len <= 0x100000)
636 cg6_card_name = "GX";
637 else
638 cg6_card_name = "GX+";
639 }
640
641 sprintf(info->fix.id, "%s %s", cg6_card_name, cg6_cpu_name);
642 info->fix.id[sizeof(info->fix.id) - 1] = 0;
643
644 info->fix.type = FB_TYPE_PACKED_PIXELS;
645 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
646
647 info->fix.line_length = linebytes;
648
649 info->fix.accel = FB_ACCEL_SUN_CGSIX;
650}
651
652/* Initialize Brooktree DAC */
653static void cg6_bt_init(struct cg6_par *par)
654{
655 struct bt_regs __iomem *bt = par->bt;
656
657 sbus_writel(0x04 << 24, &bt->addr); /* color planes */
658 sbus_writel(0xff << 24, &bt->control);
659 sbus_writel(0x05 << 24, &bt->addr);
660 sbus_writel(0x00 << 24, &bt->control);
661 sbus_writel(0x06 << 24, &bt->addr); /* overlay plane */
662 sbus_writel(0x73 << 24, &bt->control);
663 sbus_writel(0x07 << 24, &bt->addr);
664 sbus_writel(0x00 << 24, &bt->control);
665}
666
667static void cg6_chip_init(struct fb_info *info)
668{
669 struct cg6_par *par = (struct cg6_par *)info->par;
670 struct cg6_tec __iomem *tec = par->tec;
671 struct cg6_fbc __iomem *fbc = par->fbc;
672 struct cg6_thc __iomem *thc = par->thc;
673 u32 rev, conf, mode;
674 int i;
675
676 /* Hide the cursor. */
677 sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
678
679 /* Turn off stuff in the Transform Engine. */
680 sbus_writel(0, &tec->tec_matrix);
681 sbus_writel(0, &tec->tec_clip);
682 sbus_writel(0, &tec->tec_vdc);
683
684 /* Take care of bugs in old revisions. */
685 rev = (sbus_readl(par->fhc) >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK;
686 if (rev < 5) {
687 conf = (sbus_readl(par->fhc) & CG6_FHC_RES_MASK) |
688 CG6_FHC_CPU_68020 | CG6_FHC_TEST |
689 (11 << CG6_FHC_TEST_X_SHIFT) |
690 (11 << CG6_FHC_TEST_Y_SHIFT);
691 if (rev < 2)
692 conf |= CG6_FHC_DST_DISABLE;
693 sbus_writel(conf, par->fhc);
694 }
695
696 /* Set things in the FBC. Bad things appear to happen if we do
697 * back to back store/loads on the mode register, so copy it
698 * out instead. */
699 mode = sbus_readl(&fbc->mode);
700 do {
701 i = sbus_readl(&fbc->s);
702 } while (i & 0x10000000);
703 mode &= ~(CG6_FBC_BLIT_MASK | CG6_FBC_MODE_MASK |
704 CG6_FBC_DRAW_MASK | CG6_FBC_BWRITE0_MASK |
705 CG6_FBC_BWRITE1_MASK | CG6_FBC_BREAD_MASK |
706 CG6_FBC_BDISP_MASK);
707 mode |= (CG6_FBC_BLIT_SRC | CG6_FBC_MODE_COLOR8 |
708 CG6_FBC_DRAW_RENDER | CG6_FBC_BWRITE0_ENABLE |
709 CG6_FBC_BWRITE1_DISABLE | CG6_FBC_BREAD_0 |
710 CG6_FBC_BDISP_0);
711 sbus_writel(mode, &fbc->mode);
712
713 sbus_writel(0, &fbc->clip);
714 sbus_writel(0, &fbc->offx);
715 sbus_writel(0, &fbc->offy);
716 sbus_writel(0, &fbc->clipminx);
717 sbus_writel(0, &fbc->clipminy);
718 sbus_writel(info->var.xres - 1, &fbc->clipmaxx);
719 sbus_writel(info->var.yres - 1, &fbc->clipmaxy);
720}
721
722static void cg6_unmap_regs(struct platform_device *op, struct fb_info *info,
723 struct cg6_par *par)
724{
725 if (par->fbc)
726 of_iounmap(&op->resource[0], par->fbc, 4096);
727 if (par->tec)
728 of_iounmap(&op->resource[0], par->tec, sizeof(struct cg6_tec));
729 if (par->thc)
730 of_iounmap(&op->resource[0], par->thc, sizeof(struct cg6_thc));
731 if (par->bt)
732 of_iounmap(&op->resource[0], par->bt, sizeof(struct bt_regs));
733 if (par->fhc)
734 of_iounmap(&op->resource[0], par->fhc, sizeof(u32));
735
736 if (info->screen_base)
737 of_iounmap(&op->resource[0], info->screen_base,
738 info->fix.smem_len);
739}
740
741static int cg6_probe(struct platform_device *op)
742{
743 struct device_node *dp = op->dev.of_node;
744 struct fb_info *info;
745 struct cg6_par *par;
746 int linebytes, err;
747 int dblbuf;
748
749 info = framebuffer_alloc(sizeof(struct cg6_par), &op->dev);
750
751 err = -ENOMEM;
752 if (!info)
753 goto out_err;
754 par = info->par;
755
756 spin_lock_init(&par->lock);
757
758 info->fix.smem_start = op->resource[0].start;
759 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
760
761 sbusfb_fill_var(&info->var, dp, 8);
762 info->var.red.length = 8;
763 info->var.green.length = 8;
764 info->var.blue.length = 8;
765
766 linebytes = of_getintprop_default(dp, "linebytes",
767 info->var.xres);
768 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
769
770 dblbuf = of_getintprop_default(dp, "dblbuf", 0);
771 if (dblbuf)
772 info->fix.smem_len *= 4;
773
774 par->fbc = of_ioremap(&op->resource[0], CG6_FBC_OFFSET,
775 4096, "cgsix fbc");
776 par->tec = of_ioremap(&op->resource[0], CG6_TEC_OFFSET,
777 sizeof(struct cg6_tec), "cgsix tec");
778 par->thc = of_ioremap(&op->resource[0], CG6_THC_OFFSET,
779 sizeof(struct cg6_thc), "cgsix thc");
780 par->bt = of_ioremap(&op->resource[0], CG6_BROOKTREE_OFFSET,
781 sizeof(struct bt_regs), "cgsix dac");
782 par->fhc = of_ioremap(&op->resource[0], CG6_FHC_OFFSET,
783 sizeof(u32), "cgsix fhc");
784
785 info->flags = FBINFO_HWACCEL_IMAGEBLIT |
786 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
787 FBINFO_READS_FAST;
788 info->fbops = &cg6_ops;
789
790 info->screen_base = of_ioremap(&op->resource[0], CG6_RAM_OFFSET,
791 info->fix.smem_len, "cgsix ram");
792 if (!par->fbc || !par->tec || !par->thc ||
793 !par->bt || !par->fhc || !info->screen_base)
794 goto out_unmap_regs;
795
796 info->var.accel_flags = FB_ACCELF_TEXT;
797
798 cg6_bt_init(par);
799 cg6_chip_init(info);
800 cg6_blank(FB_BLANK_UNBLANK, info);
801
802 if (fb_alloc_cmap(&info->cmap, 256, 0))
803 goto out_unmap_regs;
804
805 fb_set_cmap(&info->cmap, info);
806 cg6_init_fix(info, linebytes);
807
808 err = register_framebuffer(info);
809 if (err < 0)
810 goto out_dealloc_cmap;
811
812 dev_set_drvdata(&op->dev, info);
813
814 printk(KERN_INFO "%pOF: CGsix [%s] at %lx:%lx\n",
815 dp, info->fix.id,
816 par->which_io, info->fix.smem_start);
817
818 return 0;
819
820out_dealloc_cmap:
821 fb_dealloc_cmap(&info->cmap);
822
823out_unmap_regs:
824 cg6_unmap_regs(op, info, par);
825 framebuffer_release(info);
826
827out_err:
828 return err;
829}
830
831static void cg6_remove(struct platform_device *op)
832{
833 struct fb_info *info = dev_get_drvdata(&op->dev);
834 struct cg6_par *par = info->par;
835
836 unregister_framebuffer(info);
837 fb_dealloc_cmap(&info->cmap);
838
839 cg6_unmap_regs(op, info, par);
840
841 framebuffer_release(info);
842}
843
844static const struct of_device_id cg6_match[] = {
845 {
846 .name = "cgsix",
847 },
848 {
849 .name = "cgthree+",
850 },
851 {},
852};
853MODULE_DEVICE_TABLE(of, cg6_match);
854
855static struct platform_driver cg6_driver = {
856 .driver = {
857 .name = "cg6",
858 .of_match_table = cg6_match,
859 },
860 .probe = cg6_probe,
861 .remove = cg6_remove,
862};
863
864static int __init cg6_init(void)
865{
866 if (fb_get_options("cg6fb", NULL))
867 return -ENODEV;
868
869 return platform_driver_register(&cg6_driver);
870}
871
872static void __exit cg6_exit(void)
873{
874 platform_driver_unregister(&cg6_driver);
875}
876
877module_init(cg6_init);
878module_exit(cg6_exit);
879
880MODULE_DESCRIPTION("framebuffer driver for CGsix chipsets");
881MODULE_AUTHOR("David S. Miller <[email protected]>");
882MODULE_VERSION("2.0");
883MODULE_LICENSE("GPL");