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1// SPDX-License-Identifier: GPL-2.0-only
2/* leo.c: LEO frame buffer driver
3 *
4 * Copyright (C) 2003, 2006 David S. Miller ([email protected])
5 * Copyright (C) 1996-1999 Jakub Jelinek ([email protected])
6 * Copyright (C) 1997 Michal Rehacek ([email protected])
7 *
8 * Driver layout based loosely on tgafb.c, see that file for credits.
9 */
10
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/errno.h>
14#include <linux/string.h>
15#include <linux/delay.h>
16#include <linux/init.h>
17#include <linux/fb.h>
18#include <linux/mm.h>
19#include <linux/io.h>
20#include <linux/of.h>
21#include <linux/platform_device.h>
22
23#include <asm/fbio.h>
24
25#include "sbuslib.h"
26
27/*
28 * Local functions.
29 */
30
31static int leo_setcolreg(unsigned, unsigned, unsigned, unsigned,
32 unsigned, struct fb_info *);
33static int leo_blank(int, struct fb_info *);
34static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *);
35
36static int leo_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);
37static int leo_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg);
38
39/*
40 * Frame buffer operations
41 */
42
43static const struct fb_ops leo_ops = {
44 .owner = THIS_MODULE,
45 FB_DEFAULT_SBUS_OPS(leo),
46 .fb_setcolreg = leo_setcolreg,
47 .fb_blank = leo_blank,
48 .fb_pan_display = leo_pan_display,
49};
50
51#define LEO_OFF_LC_SS0_KRN 0x00200000UL
52#define LEO_OFF_LC_SS0_USR 0x00201000UL
53#define LEO_OFF_LC_SS1_KRN 0x01200000UL
54#define LEO_OFF_LC_SS1_USR 0x01201000UL
55#define LEO_OFF_LD_SS0 0x00400000UL
56#define LEO_OFF_LD_SS1 0x01400000UL
57#define LEO_OFF_LD_GBL 0x00401000UL
58#define LEO_OFF_LX_KRN 0x00600000UL
59#define LEO_OFF_LX_CURSOR 0x00601000UL
60#define LEO_OFF_SS0 0x00800000UL
61#define LEO_OFF_SS1 0x01800000UL
62#define LEO_OFF_UNK 0x00602000UL
63#define LEO_OFF_UNK2 0x00000000UL
64
65#define LEO_CUR_ENABLE 0x00000080
66#define LEO_CUR_UPDATE 0x00000030
67#define LEO_CUR_PROGRESS 0x00000006
68#define LEO_CUR_UPDATECMAP 0x00000003
69
70#define LEO_CUR_TYPE_MASK 0x00000000
71#define LEO_CUR_TYPE_IMAGE 0x00000020
72#define LEO_CUR_TYPE_CMAP 0x00000050
73
74struct leo_cursor {
75 u8 xxx0[16];
76 u32 cur_type;
77 u32 cur_misc;
78 u32 cur_cursxy;
79 u32 cur_data;
80};
81
82#define LEO_KRN_TYPE_CLUT0 0x00001000
83#define LEO_KRN_TYPE_CLUT1 0x00001001
84#define LEO_KRN_TYPE_CLUT2 0x00001002
85#define LEO_KRN_TYPE_WID 0x00001003
86#define LEO_KRN_TYPE_UNK 0x00001006
87#define LEO_KRN_TYPE_VIDEO 0x00002003
88#define LEO_KRN_TYPE_CLUTDATA 0x00004000
89#define LEO_KRN_CSR_ENABLE 0x00000008
90#define LEO_KRN_CSR_PROGRESS 0x00000004
91#define LEO_KRN_CSR_UNK 0x00000002
92#define LEO_KRN_CSR_UNK2 0x00000001
93
94struct leo_lx_krn {
95 u32 krn_type;
96 u32 krn_csr;
97 u32 krn_value;
98};
99
100struct leo_lc_ss0_krn {
101 u32 misc;
102 u8 xxx0[0x800-4];
103 u32 rev;
104};
105
106struct leo_lc_ss0_usr {
107 u32 csr;
108 u32 addrspace;
109 u32 fontmsk;
110 u32 fontt;
111 u32 extent;
112 u32 src;
113 u32 dst;
114 u32 copy;
115 u32 fill;
116};
117
118struct leo_lc_ss1_krn {
119 u8 unknown;
120};
121
122struct leo_lc_ss1_usr {
123 u8 unknown;
124};
125
126struct leo_ld_ss0 {
127 u8 xxx0[0xe00];
128 u32 csr;
129 u32 wid;
130 u32 wmask;
131 u32 widclip;
132 u32 vclipmin;
133 u32 vclipmax;
134 u32 pickmin; /* SS1 only */
135 u32 pickmax; /* SS1 only */
136 u32 fg;
137 u32 bg;
138 u32 src; /* Copy/Scroll (SS0 only) */
139 u32 dst; /* Copy/Scroll/Fill (SS0 only) */
140 u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
141 u32 xxx1[3];
142 u32 setsem; /* SS1 only */
143 u32 clrsem; /* SS1 only */
144 u32 clrpick; /* SS1 only */
145 u32 clrdat; /* SS1 only */
146 u32 alpha; /* SS1 only */
147 u8 xxx2[0x2c];
148 u32 winbg;
149 u32 planemask;
150 u32 rop;
151 u32 z;
152 u32 dczf; /* SS1 only */
153 u32 dczb; /* SS1 only */
154 u32 dcs; /* SS1 only */
155 u32 dczs; /* SS1 only */
156 u32 pickfb; /* SS1 only */
157 u32 pickbb; /* SS1 only */
158 u32 dcfc; /* SS1 only */
159 u32 forcecol; /* SS1 only */
160 u32 door[8]; /* SS1 only */
161 u32 pick[5]; /* SS1 only */
162};
163
164#define LEO_SS1_MISC_ENABLE 0x00000001
165#define LEO_SS1_MISC_STEREO 0x00000002
166struct leo_ld_ss1 {
167 u8 xxx0[0xef4];
168 u32 ss1_misc;
169};
170
171struct leo_ld_gbl {
172 u8 unknown;
173};
174
175struct leo_par {
176 spinlock_t lock;
177 struct leo_lx_krn __iomem *lx_krn;
178 struct leo_lc_ss0_usr __iomem *lc_ss0_usr;
179 struct leo_ld_ss0 __iomem *ld_ss0;
180 struct leo_ld_ss1 __iomem *ld_ss1;
181 struct leo_cursor __iomem *cursor;
182 u32 extent;
183 u32 clut_data[256];
184
185 u32 flags;
186#define LEO_FLAG_BLANKED 0x00000001
187
188 unsigned long which_io;
189};
190
191static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
192{
193 int i;
194
195 for (i = 0;
196 (sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) &&
197 i < 300000;
198 i++)
199 udelay(1); /* Busy wait at most 0.3 sec */
200 return;
201}
202
203static void leo_switch_from_graph(struct fb_info *info)
204{
205 struct leo_par *par = (struct leo_par *) info->par;
206 struct leo_ld_ss0 __iomem *ss = par->ld_ss0;
207 struct leo_cursor __iomem *cursor = par->cursor;
208 unsigned long flags;
209 u32 val;
210
211 spin_lock_irqsave(&par->lock, flags);
212
213 par->extent = ((info->var.xres - 1) |
214 ((info->var.yres - 1) << 16));
215
216 sbus_writel(0xffffffff, &ss->wid);
217 sbus_writel(0xffff, &ss->wmask);
218 sbus_writel(0, &ss->vclipmin);
219 sbus_writel(par->extent, &ss->vclipmax);
220 sbus_writel(0, &ss->fg);
221 sbus_writel(0xff000000, &ss->planemask);
222 sbus_writel(0x310850, &ss->rop);
223 sbus_writel(0, &ss->widclip);
224 sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11),
225 &par->lc_ss0_usr->extent);
226 sbus_writel(4, &par->lc_ss0_usr->addrspace);
227 sbus_writel(0x80000000, &par->lc_ss0_usr->fill);
228 sbus_writel(0, &par->lc_ss0_usr->fontt);
229 do {
230 val = sbus_readl(&par->lc_ss0_usr->csr);
231 } while (val & 0x20000000);
232
233 /* setup screen buffer for cfb_* functions */
234 sbus_writel(1, &ss->wid);
235 sbus_writel(0x00ffffff, &ss->planemask);
236 sbus_writel(0x310b90, &ss->rop);
237 sbus_writel(0, &par->lc_ss0_usr->addrspace);
238
239 /* hide cursor */
240 sbus_writel(sbus_readl(&cursor->cur_misc) & ~LEO_CUR_ENABLE, &cursor->cur_misc);
241
242 spin_unlock_irqrestore(&par->lock, flags);
243}
244
245static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
246{
247 /* We just use this to catch switches out of
248 * graphics mode.
249 */
250 leo_switch_from_graph(info);
251
252 if (var->xoffset || var->yoffset || var->vmode)
253 return -EINVAL;
254 return 0;
255}
256
257/**
258 * leo_setcolreg - Optional function. Sets a color register.
259 * @regno: boolean, 0 copy local, 1 get_user() function
260 * @red: frame buffer colormap structure
261 * @green: The green value which can be up to 16 bits wide
262 * @blue: The blue value which can be up to 16 bits wide.
263 * @transp: If supported the alpha value which can be up to 16 bits wide.
264 * @info: frame buffer info structure
265 */
266static int leo_setcolreg(unsigned regno,
267 unsigned red, unsigned green, unsigned blue,
268 unsigned transp, struct fb_info *info)
269{
270 struct leo_par *par = (struct leo_par *) info->par;
271 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
272 unsigned long flags;
273 u32 val;
274 int i;
275
276 if (regno >= 256)
277 return 1;
278
279 red >>= 8;
280 green >>= 8;
281 blue >>= 8;
282
283 par->clut_data[regno] = red | (green << 8) | (blue << 16);
284
285 spin_lock_irqsave(&par->lock, flags);
286
287 leo_wait(lx_krn);
288
289 sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
290 for (i = 0; i < 256; i++)
291 sbus_writel(par->clut_data[i], &lx_krn->krn_value);
292 sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
293
294 val = sbus_readl(&lx_krn->krn_csr);
295 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
296 sbus_writel(val, &lx_krn->krn_csr);
297
298 spin_unlock_irqrestore(&par->lock, flags);
299
300 return 0;
301}
302
303/**
304 * leo_blank - Optional function. Blanks the display.
305 * @blank: the blank mode we want.
306 * @info: frame buffer structure that represents a single frame buffer
307 */
308static int leo_blank(int blank, struct fb_info *info)
309{
310 struct leo_par *par = (struct leo_par *) info->par;
311 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
312 unsigned long flags;
313 u32 val;
314
315 spin_lock_irqsave(&par->lock, flags);
316
317 switch (blank) {
318 case FB_BLANK_UNBLANK: /* Unblanking */
319 val = sbus_readl(&lx_krn->krn_csr);
320 val |= LEO_KRN_CSR_ENABLE;
321 sbus_writel(val, &lx_krn->krn_csr);
322 par->flags &= ~LEO_FLAG_BLANKED;
323 break;
324
325 case FB_BLANK_NORMAL: /* Normal blanking */
326 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
327 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
328 case FB_BLANK_POWERDOWN: /* Poweroff */
329 val = sbus_readl(&lx_krn->krn_csr);
330 val &= ~LEO_KRN_CSR_ENABLE;
331 sbus_writel(val, &lx_krn->krn_csr);
332 par->flags |= LEO_FLAG_BLANKED;
333 break;
334 }
335
336 spin_unlock_irqrestore(&par->lock, flags);
337
338 return 0;
339}
340
341static const struct sbus_mmap_map leo_mmap_map[] = {
342 {
343 .voff = LEO_SS0_MAP,
344 .poff = LEO_OFF_SS0,
345 .size = 0x800000
346 },
347 {
348 .voff = LEO_LC_SS0_USR_MAP,
349 .poff = LEO_OFF_LC_SS0_USR,
350 .size = 0x1000
351 },
352 {
353 .voff = LEO_LD_SS0_MAP,
354 .poff = LEO_OFF_LD_SS0,
355 .size = 0x1000
356 },
357 {
358 .voff = LEO_LX_CURSOR_MAP,
359 .poff = LEO_OFF_LX_CURSOR,
360 .size = 0x1000
361 },
362 {
363 .voff = LEO_SS1_MAP,
364 .poff = LEO_OFF_SS1,
365 .size = 0x800000
366 },
367 {
368 .voff = LEO_LC_SS1_USR_MAP,
369 .poff = LEO_OFF_LC_SS1_USR,
370 .size = 0x1000
371 },
372 {
373 .voff = LEO_LD_SS1_MAP,
374 .poff = LEO_OFF_LD_SS1,
375 .size = 0x1000
376 },
377 {
378 .voff = LEO_UNK_MAP,
379 .poff = LEO_OFF_UNK,
380 .size = 0x1000
381 },
382 {
383 .voff = LEO_LX_KRN_MAP,
384 .poff = LEO_OFF_LX_KRN,
385 .size = 0x1000
386 },
387 {
388 .voff = LEO_LC_SS0_KRN_MAP,
389 .poff = LEO_OFF_LC_SS0_KRN,
390 .size = 0x1000
391 },
392 {
393 .voff = LEO_LC_SS1_KRN_MAP,
394 .poff = LEO_OFF_LC_SS1_KRN,
395 .size = 0x1000
396 },
397 {
398 .voff = LEO_LD_GBL_MAP,
399 .poff = LEO_OFF_LD_GBL,
400 .size = 0x1000
401 },
402 {
403 .voff = LEO_UNK2_MAP,
404 .poff = LEO_OFF_UNK2,
405 .size = 0x100000
406 },
407 { .size = 0 }
408};
409
410static int leo_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
411{
412 struct leo_par *par = (struct leo_par *)info->par;
413
414 return sbusfb_mmap_helper(leo_mmap_map,
415 info->fix.smem_start, info->fix.smem_len,
416 par->which_io, vma);
417}
418
419static int leo_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
420{
421 return sbusfb_ioctl_helper(cmd, arg, info,
422 FBTYPE_SUNLEO, 32, info->fix.smem_len);
423}
424
425/*
426 * Initialisation
427 */
428
429static void
430leo_init_fix(struct fb_info *info, struct device_node *dp)
431{
432 snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp);
433
434 info->fix.type = FB_TYPE_PACKED_PIXELS;
435 info->fix.visual = FB_VISUAL_TRUECOLOR;
436
437 info->fix.line_length = 8192;
438
439 info->fix.accel = FB_ACCEL_SUN_LEO;
440}
441
442static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
443{
444 struct leo_par *par = (struct leo_par *) info->par;
445 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
446 struct fb_wid_item *wi;
447 unsigned long flags;
448 u32 val;
449 int i, j;
450
451 spin_lock_irqsave(&par->lock, flags);
452
453 leo_wait(lx_krn);
454
455 for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
456 switch (wi->wi_type) {
457 case FB_WID_DBL_8:
458 j = (wi->wi_index & 0xf) + 0x40;
459 break;
460
461 case FB_WID_DBL_24:
462 j = wi->wi_index & 0x3f;
463 break;
464
465 default:
466 continue;
467 }
468 sbus_writel(0x5800 + j, &lx_krn->krn_type);
469 sbus_writel(wi->wi_values[0], &lx_krn->krn_value);
470 }
471 sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
472
473 val = sbus_readl(&lx_krn->krn_csr);
474 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
475 sbus_writel(val, &lx_krn->krn_csr);
476
477 spin_unlock_irqrestore(&par->lock, flags);
478}
479
480static void leo_init_wids(struct fb_info *info)
481{
482 struct fb_wid_item wi;
483 struct fb_wid_list wl;
484
485 wl.wl_count = 1;
486 wl.wl_list = &wi;
487 wi.wi_type = FB_WID_DBL_8;
488 wi.wi_index = 0;
489 wi.wi_values [0] = 0x2c0;
490 leo_wid_put(info, &wl);
491 wi.wi_index = 1;
492 wi.wi_values [0] = 0x30;
493 leo_wid_put(info, &wl);
494 wi.wi_index = 2;
495 wi.wi_values [0] = 0x20;
496 leo_wid_put(info, &wl);
497 wi.wi_type = FB_WID_DBL_24;
498 wi.wi_index = 1;
499 wi.wi_values [0] = 0x30;
500 leo_wid_put(info, &wl);
501}
502
503static void leo_init_hw(struct fb_info *info)
504{
505 struct leo_par *par = (struct leo_par *) info->par;
506 u32 val;
507
508 val = sbus_readl(&par->ld_ss1->ss1_misc);
509 val |= LEO_SS1_MISC_ENABLE;
510 sbus_writel(val, &par->ld_ss1->ss1_misc);
511
512 leo_switch_from_graph(info);
513}
514
515static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
516{
517 var->red.offset = 0;
518 var->red.length = 8;
519 var->green.offset = 8;
520 var->green.length = 8;
521 var->blue.offset = 16;
522 var->blue.length = 8;
523 var->transp.offset = 0;
524 var->transp.length = 0;
525}
526
527static void leo_unmap_regs(struct platform_device *op, struct fb_info *info,
528 struct leo_par *par)
529{
530 if (par->lc_ss0_usr)
531 of_iounmap(&op->resource[0], par->lc_ss0_usr, 0x1000);
532 if (par->ld_ss0)
533 of_iounmap(&op->resource[0], par->ld_ss0, 0x1000);
534 if (par->ld_ss1)
535 of_iounmap(&op->resource[0], par->ld_ss1, 0x1000);
536 if (par->lx_krn)
537 of_iounmap(&op->resource[0], par->lx_krn, 0x1000);
538 if (par->cursor)
539 of_iounmap(&op->resource[0],
540 par->cursor, sizeof(struct leo_cursor));
541 if (info->screen_base)
542 of_iounmap(&op->resource[0], info->screen_base, 0x800000);
543}
544
545static int leo_probe(struct platform_device *op)
546{
547 struct device_node *dp = op->dev.of_node;
548 struct fb_info *info;
549 struct leo_par *par;
550 int linebytes, err;
551
552 info = framebuffer_alloc(sizeof(struct leo_par), &op->dev);
553
554 err = -ENOMEM;
555 if (!info)
556 goto out_err;
557 par = info->par;
558
559 spin_lock_init(&par->lock);
560
561 info->fix.smem_start = op->resource[0].start;
562 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
563
564 sbusfb_fill_var(&info->var, dp, 32);
565 leo_fixup_var_rgb(&info->var);
566
567 linebytes = of_getintprop_default(dp, "linebytes",
568 info->var.xres);
569 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
570
571 par->lc_ss0_usr =
572 of_ioremap(&op->resource[0], LEO_OFF_LC_SS0_USR,
573 0x1000, "leolc ss0usr");
574 par->ld_ss0 =
575 of_ioremap(&op->resource[0], LEO_OFF_LD_SS0,
576 0x1000, "leold ss0");
577 par->ld_ss1 =
578 of_ioremap(&op->resource[0], LEO_OFF_LD_SS1,
579 0x1000, "leold ss1");
580 par->lx_krn =
581 of_ioremap(&op->resource[0], LEO_OFF_LX_KRN,
582 0x1000, "leolx krn");
583 par->cursor =
584 of_ioremap(&op->resource[0], LEO_OFF_LX_CURSOR,
585 sizeof(struct leo_cursor), "leolx cursor");
586 info->screen_base =
587 of_ioremap(&op->resource[0], LEO_OFF_SS0,
588 0x800000, "leo ram");
589 if (!par->lc_ss0_usr ||
590 !par->ld_ss0 ||
591 !par->ld_ss1 ||
592 !par->lx_krn ||
593 !par->cursor ||
594 !info->screen_base)
595 goto out_unmap_regs;
596
597 info->fbops = &leo_ops;
598 info->pseudo_palette = par->clut_data;
599
600 leo_init_wids(info);
601 leo_init_hw(info);
602
603 leo_blank(FB_BLANK_UNBLANK, info);
604
605 if (fb_alloc_cmap(&info->cmap, 256, 0))
606 goto out_unmap_regs;
607
608 leo_init_fix(info, dp);
609
610 err = register_framebuffer(info);
611 if (err < 0)
612 goto out_dealloc_cmap;
613
614 dev_set_drvdata(&op->dev, info);
615
616 printk(KERN_INFO "%pOF: leo at %lx:%lx\n",
617 dp,
618 par->which_io, info->fix.smem_start);
619
620 return 0;
621
622out_dealloc_cmap:
623 fb_dealloc_cmap(&info->cmap);
624
625out_unmap_regs:
626 leo_unmap_regs(op, info, par);
627 framebuffer_release(info);
628
629out_err:
630 return err;
631}
632
633static void leo_remove(struct platform_device *op)
634{
635 struct fb_info *info = dev_get_drvdata(&op->dev);
636 struct leo_par *par = info->par;
637
638 unregister_framebuffer(info);
639 fb_dealloc_cmap(&info->cmap);
640
641 leo_unmap_regs(op, info, par);
642
643 framebuffer_release(info);
644}
645
646static const struct of_device_id leo_match[] = {
647 {
648 .name = "SUNW,leo",
649 },
650 {},
651};
652MODULE_DEVICE_TABLE(of, leo_match);
653
654static struct platform_driver leo_driver = {
655 .driver = {
656 .name = "leo",
657 .of_match_table = leo_match,
658 },
659 .probe = leo_probe,
660 .remove = leo_remove,
661};
662
663static int __init leo_init(void)
664{
665 if (fb_get_options("leofb", NULL))
666 return -ENODEV;
667
668 return platform_driver_register(&leo_driver);
669}
670
671static void __exit leo_exit(void)
672{
673 platform_driver_unregister(&leo_driver);
674}
675
676module_init(leo_init);
677module_exit(leo_exit);
678
679MODULE_DESCRIPTION("framebuffer driver for LEO chipsets");
680MODULE_AUTHOR("David S. Miller <[email protected]>");
681MODULE_VERSION("2.0");
682MODULE_LICENSE("GPL");