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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* leo.c: LEO frame buffer driver
2 *
3 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1996-1999 Jakub Jelinek (jj@ultra.linux.cz)
5 * Copyright (C) 1997 Michal Rehacek (Michal.Rehacek@st.mff.cuni.cz)
6 *
7 * Driver layout based loosely on tgafb.c, see that file for credits.
8 */
9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/errno.h>
13#include <linux/string.h>
14#include <linux/slab.h>
15#include <linux/delay.h>
16#include <linux/init.h>
17#include <linux/fb.h>
18#include <linux/mm.h>
19#include <linux/of_device.h>
20#include <linux/io.h>
21
22#include <asm/fbio.h>
23
24#include "sbuslib.h"
25
26/*
27 * Local functions.
28 */
29
30static int leo_setcolreg(unsigned, unsigned, unsigned, unsigned,
31 unsigned, struct fb_info *);
32static int leo_blank(int, struct fb_info *);
33
34static int leo_mmap(struct fb_info *, struct vm_area_struct *);
35static int leo_ioctl(struct fb_info *, unsigned int, unsigned long);
36static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *);
37
38/*
39 * Frame buffer operations
40 */
41
42static struct fb_ops leo_ops = {
43 .owner = THIS_MODULE,
44 .fb_setcolreg = leo_setcolreg,
45 .fb_blank = leo_blank,
46 .fb_pan_display = leo_pan_display,
47 .fb_fillrect = cfb_fillrect,
48 .fb_copyarea = cfb_copyarea,
49 .fb_imageblit = cfb_imageblit,
50 .fb_mmap = leo_mmap,
51 .fb_ioctl = leo_ioctl,
52#ifdef CONFIG_COMPAT
53 .fb_compat_ioctl = sbusfb_compat_ioctl,
54#endif
55};
56
57#define LEO_OFF_LC_SS0_KRN 0x00200000UL
58#define LEO_OFF_LC_SS0_USR 0x00201000UL
59#define LEO_OFF_LC_SS1_KRN 0x01200000UL
60#define LEO_OFF_LC_SS1_USR 0x01201000UL
61#define LEO_OFF_LD_SS0 0x00400000UL
62#define LEO_OFF_LD_SS1 0x01400000UL
63#define LEO_OFF_LD_GBL 0x00401000UL
64#define LEO_OFF_LX_KRN 0x00600000UL
65#define LEO_OFF_LX_CURSOR 0x00601000UL
66#define LEO_OFF_SS0 0x00800000UL
67#define LEO_OFF_SS1 0x01800000UL
68#define LEO_OFF_UNK 0x00602000UL
69#define LEO_OFF_UNK2 0x00000000UL
70
71#define LEO_CUR_ENABLE 0x00000080
72#define LEO_CUR_UPDATE 0x00000030
73#define LEO_CUR_PROGRESS 0x00000006
74#define LEO_CUR_UPDATECMAP 0x00000003
75
76#define LEO_CUR_TYPE_MASK 0x00000000
77#define LEO_CUR_TYPE_IMAGE 0x00000020
78#define LEO_CUR_TYPE_CMAP 0x00000050
79
80struct leo_cursor {
81 u8 xxx0[16];
82 u32 cur_type;
83 u32 cur_misc;
84 u32 cur_cursxy;
85 u32 cur_data;
86};
87
88#define LEO_KRN_TYPE_CLUT0 0x00001000
89#define LEO_KRN_TYPE_CLUT1 0x00001001
90#define LEO_KRN_TYPE_CLUT2 0x00001002
91#define LEO_KRN_TYPE_WID 0x00001003
92#define LEO_KRN_TYPE_UNK 0x00001006
93#define LEO_KRN_TYPE_VIDEO 0x00002003
94#define LEO_KRN_TYPE_CLUTDATA 0x00004000
95#define LEO_KRN_CSR_ENABLE 0x00000008
96#define LEO_KRN_CSR_PROGRESS 0x00000004
97#define LEO_KRN_CSR_UNK 0x00000002
98#define LEO_KRN_CSR_UNK2 0x00000001
99
100struct leo_lx_krn {
101 u32 krn_type;
102 u32 krn_csr;
103 u32 krn_value;
104};
105
106struct leo_lc_ss0_krn {
107 u32 misc;
108 u8 xxx0[0x800-4];
109 u32 rev;
110};
111
112struct leo_lc_ss0_usr {
113 u32 csr;
114 u32 addrspace;
115 u32 fontmsk;
116 u32 fontt;
117 u32 extent;
118 u32 src;
119 u32 dst;
120 u32 copy;
121 u32 fill;
122};
123
124struct leo_lc_ss1_krn {
125 u8 unknown;
126};
127
128struct leo_lc_ss1_usr {
129 u8 unknown;
130};
131
132struct leo_ld_ss0 {
133 u8 xxx0[0xe00];
134 u32 csr;
135 u32 wid;
136 u32 wmask;
137 u32 widclip;
138 u32 vclipmin;
139 u32 vclipmax;
140 u32 pickmin; /* SS1 only */
141 u32 pickmax; /* SS1 only */
142 u32 fg;
143 u32 bg;
144 u32 src; /* Copy/Scroll (SS0 only) */
145 u32 dst; /* Copy/Scroll/Fill (SS0 only) */
146 u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
147 u32 xxx1[3];
148 u32 setsem; /* SS1 only */
149 u32 clrsem; /* SS1 only */
150 u32 clrpick; /* SS1 only */
151 u32 clrdat; /* SS1 only */
152 u32 alpha; /* SS1 only */
153 u8 xxx2[0x2c];
154 u32 winbg;
155 u32 planemask;
156 u32 rop;
157 u32 z;
158 u32 dczf; /* SS1 only */
159 u32 dczb; /* SS1 only */
160 u32 dcs; /* SS1 only */
161 u32 dczs; /* SS1 only */
162 u32 pickfb; /* SS1 only */
163 u32 pickbb; /* SS1 only */
164 u32 dcfc; /* SS1 only */
165 u32 forcecol; /* SS1 only */
166 u32 door[8]; /* SS1 only */
167 u32 pick[5]; /* SS1 only */
168};
169
170#define LEO_SS1_MISC_ENABLE 0x00000001
171#define LEO_SS1_MISC_STEREO 0x00000002
172struct leo_ld_ss1 {
173 u8 xxx0[0xef4];
174 u32 ss1_misc;
175};
176
177struct leo_ld_gbl {
178 u8 unknown;
179};
180
181struct leo_par {
182 spinlock_t lock;
183 struct leo_lx_krn __iomem *lx_krn;
184 struct leo_lc_ss0_usr __iomem *lc_ss0_usr;
185 struct leo_ld_ss0 __iomem *ld_ss0;
186 struct leo_ld_ss1 __iomem *ld_ss1;
187 struct leo_cursor __iomem *cursor;
188 u32 extent;
189 u32 clut_data[256];
190
191 u32 flags;
192#define LEO_FLAG_BLANKED 0x00000001
193
194 unsigned long which_io;
195};
196
197static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
198{
199 int i;
200
201 for (i = 0;
202 (sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) &&
203 i < 300000;
204 i++)
205 udelay(1); /* Busy wait at most 0.3 sec */
206 return;
207}
208
209static void leo_switch_from_graph(struct fb_info *info)
210{
211 struct leo_par *par = (struct leo_par *) info->par;
212 struct leo_ld_ss0 __iomem *ss = par->ld_ss0;
213 struct leo_cursor __iomem *cursor = par->cursor;
214 unsigned long flags;
215 u32 val;
216
217 spin_lock_irqsave(&par->lock, flags);
218
219 par->extent = ((info->var.xres - 1) |
220 ((info->var.yres - 1) << 16));
221
222 sbus_writel(0xffffffff, &ss->wid);
223 sbus_writel(0xffff, &ss->wmask);
224 sbus_writel(0, &ss->vclipmin);
225 sbus_writel(par->extent, &ss->vclipmax);
226 sbus_writel(0, &ss->fg);
227 sbus_writel(0xff000000, &ss->planemask);
228 sbus_writel(0x310850, &ss->rop);
229 sbus_writel(0, &ss->widclip);
230 sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11),
231 &par->lc_ss0_usr->extent);
232 sbus_writel(4, &par->lc_ss0_usr->addrspace);
233 sbus_writel(0x80000000, &par->lc_ss0_usr->fill);
234 sbus_writel(0, &par->lc_ss0_usr->fontt);
235 do {
236 val = sbus_readl(&par->lc_ss0_usr->csr);
237 } while (val & 0x20000000);
238
239 /* setup screen buffer for cfb_* functions */
240 sbus_writel(1, &ss->wid);
241 sbus_writel(0x00ffffff, &ss->planemask);
242 sbus_writel(0x310b90, &ss->rop);
243 sbus_writel(0, &par->lc_ss0_usr->addrspace);
244
245 /* hide cursor */
246 sbus_writel(sbus_readl(&cursor->cur_misc) & ~LEO_CUR_ENABLE, &cursor->cur_misc);
247
248 spin_unlock_irqrestore(&par->lock, flags);
249}
250
251static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
252{
253 /* We just use this to catch switches out of
254 * graphics mode.
255 */
256 leo_switch_from_graph(info);
257
258 if (var->xoffset || var->yoffset || var->vmode)
259 return -EINVAL;
260 return 0;
261}
262
263/**
264 * leo_setcolreg - Optional function. Sets a color register.
265 * @regno: boolean, 0 copy local, 1 get_user() function
266 * @red: frame buffer colormap structure
267 * @green: The green value which can be up to 16 bits wide
268 * @blue: The blue value which can be up to 16 bits wide.
269 * @transp: If supported the alpha value which can be up to 16 bits wide.
270 * @info: frame buffer info structure
271 */
272static int leo_setcolreg(unsigned regno,
273 unsigned red, unsigned green, unsigned blue,
274 unsigned transp, struct fb_info *info)
275{
276 struct leo_par *par = (struct leo_par *) info->par;
277 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
278 unsigned long flags;
279 u32 val;
280 int i;
281
282 if (regno >= 256)
283 return 1;
284
285 red >>= 8;
286 green >>= 8;
287 blue >>= 8;
288
289 par->clut_data[regno] = red | (green << 8) | (blue << 16);
290
291 spin_lock_irqsave(&par->lock, flags);
292
293 leo_wait(lx_krn);
294
295 sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
296 for (i = 0; i < 256; i++)
297 sbus_writel(par->clut_data[i], &lx_krn->krn_value);
298 sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
299
300 val = sbus_readl(&lx_krn->krn_csr);
301 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
302 sbus_writel(val, &lx_krn->krn_csr);
303
304 spin_unlock_irqrestore(&par->lock, flags);
305
306 return 0;
307}
308
309/**
310 * leo_blank - Optional function. Blanks the display.
311 * @blank_mode: the blank mode we want.
312 * @info: frame buffer structure that represents a single frame buffer
313 */
314static int leo_blank(int blank, struct fb_info *info)
315{
316 struct leo_par *par = (struct leo_par *) info->par;
317 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
318 unsigned long flags;
319 u32 val;
320
321 spin_lock_irqsave(&par->lock, flags);
322
323 switch (blank) {
324 case FB_BLANK_UNBLANK: /* Unblanking */
325 val = sbus_readl(&lx_krn->krn_csr);
326 val |= LEO_KRN_CSR_ENABLE;
327 sbus_writel(val, &lx_krn->krn_csr);
328 par->flags &= ~LEO_FLAG_BLANKED;
329 break;
330
331 case FB_BLANK_NORMAL: /* Normal blanking */
332 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
333 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
334 case FB_BLANK_POWERDOWN: /* Poweroff */
335 val = sbus_readl(&lx_krn->krn_csr);
336 val &= ~LEO_KRN_CSR_ENABLE;
337 sbus_writel(val, &lx_krn->krn_csr);
338 par->flags |= LEO_FLAG_BLANKED;
339 break;
340 }
341
342 spin_unlock_irqrestore(&par->lock, flags);
343
344 return 0;
345}
346
347static struct sbus_mmap_map leo_mmap_map[] = {
348 {
349 .voff = LEO_SS0_MAP,
350 .poff = LEO_OFF_SS0,
351 .size = 0x800000
352 },
353 {
354 .voff = LEO_LC_SS0_USR_MAP,
355 .poff = LEO_OFF_LC_SS0_USR,
356 .size = 0x1000
357 },
358 {
359 .voff = LEO_LD_SS0_MAP,
360 .poff = LEO_OFF_LD_SS0,
361 .size = 0x1000
362 },
363 {
364 .voff = LEO_LX_CURSOR_MAP,
365 .poff = LEO_OFF_LX_CURSOR,
366 .size = 0x1000
367 },
368 {
369 .voff = LEO_SS1_MAP,
370 .poff = LEO_OFF_SS1,
371 .size = 0x800000
372 },
373 {
374 .voff = LEO_LC_SS1_USR_MAP,
375 .poff = LEO_OFF_LC_SS1_USR,
376 .size = 0x1000
377 },
378 {
379 .voff = LEO_LD_SS1_MAP,
380 .poff = LEO_OFF_LD_SS1,
381 .size = 0x1000
382 },
383 {
384 .voff = LEO_UNK_MAP,
385 .poff = LEO_OFF_UNK,
386 .size = 0x1000
387 },
388 {
389 .voff = LEO_LX_KRN_MAP,
390 .poff = LEO_OFF_LX_KRN,
391 .size = 0x1000
392 },
393 {
394 .voff = LEO_LC_SS0_KRN_MAP,
395 .poff = LEO_OFF_LC_SS0_KRN,
396 .size = 0x1000
397 },
398 {
399 .voff = LEO_LC_SS1_KRN_MAP,
400 .poff = LEO_OFF_LC_SS1_KRN,
401 .size = 0x1000
402 },
403 {
404 .voff = LEO_LD_GBL_MAP,
405 .poff = LEO_OFF_LD_GBL,
406 .size = 0x1000
407 },
408 {
409 .voff = LEO_UNK2_MAP,
410 .poff = LEO_OFF_UNK2,
411 .size = 0x100000
412 },
413 { .size = 0 }
414};
415
416static int leo_mmap(struct fb_info *info, struct vm_area_struct *vma)
417{
418 struct leo_par *par = (struct leo_par *)info->par;
419
420 return sbusfb_mmap_helper(leo_mmap_map,
421 info->fix.smem_start, info->fix.smem_len,
422 par->which_io, vma);
423}
424
425static int leo_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
426{
427 return sbusfb_ioctl_helper(cmd, arg, info,
428 FBTYPE_SUNLEO, 32, info->fix.smem_len);
429}
430
431/*
432 * Initialisation
433 */
434
435static void
436leo_init_fix(struct fb_info *info, struct device_node *dp)
437{
438 strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));
439
440 info->fix.type = FB_TYPE_PACKED_PIXELS;
441 info->fix.visual = FB_VISUAL_TRUECOLOR;
442
443 info->fix.line_length = 8192;
444
445 info->fix.accel = FB_ACCEL_SUN_LEO;
446}
447
448static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
449{
450 struct leo_par *par = (struct leo_par *) info->par;
451 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
452 struct fb_wid_item *wi;
453 unsigned long flags;
454 u32 val;
455 int i, j;
456
457 spin_lock_irqsave(&par->lock, flags);
458
459 leo_wait(lx_krn);
460
461 for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
462 switch (wi->wi_type) {
463 case FB_WID_DBL_8:
464 j = (wi->wi_index & 0xf) + 0x40;
465 break;
466
467 case FB_WID_DBL_24:
468 j = wi->wi_index & 0x3f;
469 break;
470
471 default:
472 continue;
473 };
474 sbus_writel(0x5800 + j, &lx_krn->krn_type);
475 sbus_writel(wi->wi_values[0], &lx_krn->krn_value);
476 }
477 sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
478
479 val = sbus_readl(&lx_krn->krn_csr);
480 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
481 sbus_writel(val, &lx_krn->krn_csr);
482
483 spin_unlock_irqrestore(&par->lock, flags);
484}
485
486static void leo_init_wids(struct fb_info *info)
487{
488 struct fb_wid_item wi;
489 struct fb_wid_list wl;
490
491 wl.wl_count = 1;
492 wl.wl_list = &wi;
493 wi.wi_type = FB_WID_DBL_8;
494 wi.wi_index = 0;
495 wi.wi_values [0] = 0x2c0;
496 leo_wid_put(info, &wl);
497 wi.wi_index = 1;
498 wi.wi_values [0] = 0x30;
499 leo_wid_put(info, &wl);
500 wi.wi_index = 2;
501 wi.wi_values [0] = 0x20;
502 leo_wid_put(info, &wl);
503 wi.wi_type = FB_WID_DBL_24;
504 wi.wi_index = 1;
505 wi.wi_values [0] = 0x30;
506 leo_wid_put(info, &wl);
507}
508
509static void leo_init_hw(struct fb_info *info)
510{
511 struct leo_par *par = (struct leo_par *) info->par;
512 u32 val;
513
514 val = sbus_readl(&par->ld_ss1->ss1_misc);
515 val |= LEO_SS1_MISC_ENABLE;
516 sbus_writel(val, &par->ld_ss1->ss1_misc);
517
518 leo_switch_from_graph(info);
519}
520
521static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
522{
523 var->red.offset = 0;
524 var->red.length = 8;
525 var->green.offset = 8;
526 var->green.length = 8;
527 var->blue.offset = 16;
528 var->blue.length = 8;
529 var->transp.offset = 0;
530 var->transp.length = 0;
531}
532
533static void leo_unmap_regs(struct of_device *op, struct fb_info *info,
534 struct leo_par *par)
535{
536 if (par->lc_ss0_usr)
537 of_iounmap(&op->resource[0], par->lc_ss0_usr, 0x1000);
538 if (par->ld_ss0)
539 of_iounmap(&op->resource[0], par->ld_ss0, 0x1000);
540 if (par->ld_ss1)
541 of_iounmap(&op->resource[0], par->ld_ss1, 0x1000);
542 if (par->lx_krn)
543 of_iounmap(&op->resource[0], par->lx_krn, 0x1000);
544 if (par->cursor)
545 of_iounmap(&op->resource[0],
546 par->cursor, sizeof(struct leo_cursor));
547 if (info->screen_base)
548 of_iounmap(&op->resource[0], info->screen_base, 0x800000);
549}
550
551static int __devinit leo_probe(struct of_device *op,
552 const struct of_device_id *match)
553{
554 struct device_node *dp = op->node;
555 struct fb_info *info;
556 struct leo_par *par;
557 int linebytes, err;
558
559 info = framebuffer_alloc(sizeof(struct leo_par), &op->dev);
560
561 err = -ENOMEM;
562 if (!info)
563 goto out_err;
564 par = info->par;
565
566 spin_lock_init(&par->lock);
567
568 info->fix.smem_start = op->resource[0].start;
569 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
570
571 sbusfb_fill_var(&info->var, dp, 32);
572 leo_fixup_var_rgb(&info->var);
573
574 linebytes = of_getintprop_default(dp, "linebytes",
575 info->var.xres);
576 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
577
578 par->lc_ss0_usr =
579 of_ioremap(&op->resource[0], LEO_OFF_LC_SS0_USR,
580 0x1000, "leolc ss0usr");
581 par->ld_ss0 =
582 of_ioremap(&op->resource[0], LEO_OFF_LD_SS0,
583 0x1000, "leold ss0");
584 par->ld_ss1 =
585 of_ioremap(&op->resource[0], LEO_OFF_LD_SS1,
586 0x1000, "leold ss1");
587 par->lx_krn =
588 of_ioremap(&op->resource[0], LEO_OFF_LX_KRN,
589 0x1000, "leolx krn");
590 par->cursor =
591 of_ioremap(&op->resource[0], LEO_OFF_LX_CURSOR,
592 sizeof(struct leo_cursor), "leolx cursor");
593 info->screen_base =
594 of_ioremap(&op->resource[0], LEO_OFF_SS0,
595 0x800000, "leo ram");
596 if (!par->lc_ss0_usr ||
597 !par->ld_ss0 ||
598 !par->ld_ss1 ||
599 !par->lx_krn ||
600 !par->cursor ||
601 !info->screen_base)
602 goto out_unmap_regs;
603
604 info->flags = FBINFO_DEFAULT;
605 info->fbops = &leo_ops;
606 info->pseudo_palette = par->clut_data;
607
608 leo_init_wids(info);
609 leo_init_hw(info);
610
611 leo_blank(FB_BLANK_UNBLANK, info);
612
613 if (fb_alloc_cmap(&info->cmap, 256, 0))
614 goto out_unmap_regs;
615
616 leo_init_fix(info, dp);
617
618 err = register_framebuffer(info);
619 if (err < 0)
620 goto out_dealloc_cmap;
621
622 dev_set_drvdata(&op->dev, info);
623
624 printk(KERN_INFO "%s: leo at %lx:%lx\n",
625 dp->full_name,
626 par->which_io, info->fix.smem_start);
627
628 return 0;
629
630out_dealloc_cmap:
631 fb_dealloc_cmap(&info->cmap);
632
633out_unmap_regs:
634 leo_unmap_regs(op, info, par);
635 framebuffer_release(info);
636
637out_err:
638 return err;
639}
640
641static int __devexit leo_remove(struct of_device *op)
642{
643 struct fb_info *info = dev_get_drvdata(&op->dev);
644 struct leo_par *par = info->par;
645
646 unregister_framebuffer(info);
647 fb_dealloc_cmap(&info->cmap);
648
649 leo_unmap_regs(op, info, par);
650
651 framebuffer_release(info);
652
653 dev_set_drvdata(&op->dev, NULL);
654
655 return 0;
656}
657
658static const struct of_device_id leo_match[] = {
659 {
660 .name = "SUNW,leo",
661 },
662 {},
663};
664MODULE_DEVICE_TABLE(of, leo_match);
665
666static struct of_platform_driver leo_driver = {
667 .name = "leo",
668 .match_table = leo_match,
669 .probe = leo_probe,
670 .remove = __devexit_p(leo_remove),
671};
672
673static int __init leo_init(void)
674{
675 if (fb_get_options("leofb", NULL))
676 return -ENODEV;
677
678 return of_register_driver(&leo_driver, &of_bus_type);
679}
680
681static void __exit leo_exit(void)
682{
683 of_unregister_driver(&leo_driver);
684}
685
686module_init(leo_init);
687module_exit(leo_exit);
688
689MODULE_DESCRIPTION("framebuffer driver for LEO chipsets");
690MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
691MODULE_VERSION("2.0");
692MODULE_LICENSE("GPL");