tjh.dev
Linux kernel mirror (for testing)
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linux
1/* leo.c: LEO frame buffer driver
2 *
3 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
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
20#include <asm/io.h>
21#include <asm/sbus.h>
22#include <asm/oplib.h>
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 *);
34
35static int leo_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
36static int leo_ioctl(struct inode *, struct file *, unsigned int,
37 unsigned long, struct fb_info *);
38static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *);
39
40/*
41 * Frame buffer operations
42 */
43
44static struct fb_ops leo_ops = {
45 .owner = THIS_MODULE,
46 .fb_setcolreg = leo_setcolreg,
47 .fb_blank = leo_blank,
48 .fb_pan_display = leo_pan_display,
49 .fb_fillrect = cfb_fillrect,
50 .fb_copyarea = cfb_copyarea,
51 .fb_imageblit = cfb_imageblit,
52 .fb_mmap = leo_mmap,
53 .fb_ioctl = leo_ioctl,
54#ifdef CONFIG_COMPAT
55 .fb_compat_ioctl = sbusfb_compat_ioctl,
56#endif
57};
58
59#define LEO_OFF_LC_SS0_KRN 0x00200000UL
60#define LEO_OFF_LC_SS0_USR 0x00201000UL
61#define LEO_OFF_LC_SS1_KRN 0x01200000UL
62#define LEO_OFF_LC_SS1_USR 0x01201000UL
63#define LEO_OFF_LD_SS0 0x00400000UL
64#define LEO_OFF_LD_SS1 0x01400000UL
65#define LEO_OFF_LD_GBL 0x00401000UL
66#define LEO_OFF_LX_KRN 0x00600000UL
67#define LEO_OFF_LX_CURSOR 0x00601000UL
68#define LEO_OFF_SS0 0x00800000UL
69#define LEO_OFF_SS1 0x01800000UL
70#define LEO_OFF_UNK 0x00602000UL
71#define LEO_OFF_UNK2 0x00000000UL
72
73#define LEO_CUR_ENABLE 0x00000080
74#define LEO_CUR_UPDATE 0x00000030
75#define LEO_CUR_PROGRESS 0x00000006
76#define LEO_CUR_UPDATECMAP 0x00000003
77
78#define LEO_CUR_TYPE_MASK 0x00000000
79#define LEO_CUR_TYPE_IMAGE 0x00000020
80#define LEO_CUR_TYPE_CMAP 0x00000050
81
82struct leo_cursor {
83 u8 xxx0[16];
84 volatile u32 cur_type;
85 volatile u32 cur_misc;
86 volatile u32 cur_cursxy;
87 volatile u32 cur_data;
88};
89
90#define LEO_KRN_TYPE_CLUT0 0x00001000
91#define LEO_KRN_TYPE_CLUT1 0x00001001
92#define LEO_KRN_TYPE_CLUT2 0x00001002
93#define LEO_KRN_TYPE_WID 0x00001003
94#define LEO_KRN_TYPE_UNK 0x00001006
95#define LEO_KRN_TYPE_VIDEO 0x00002003
96#define LEO_KRN_TYPE_CLUTDATA 0x00004000
97#define LEO_KRN_CSR_ENABLE 0x00000008
98#define LEO_KRN_CSR_PROGRESS 0x00000004
99#define LEO_KRN_CSR_UNK 0x00000002
100#define LEO_KRN_CSR_UNK2 0x00000001
101
102struct leo_lx_krn {
103 volatile u32 krn_type;
104 volatile u32 krn_csr;
105 volatile u32 krn_value;
106};
107
108struct leo_lc_ss0_krn {
109 volatile u32 misc;
110 u8 xxx0[0x800-4];
111 volatile u32 rev;
112};
113
114struct leo_lc_ss0_usr {
115 volatile u32 csr;
116 volatile u32 addrspace;
117 volatile u32 fontmsk;
118 volatile u32 fontt;
119 volatile u32 extent;
120 volatile u32 src;
121 u32 dst;
122 volatile u32 copy;
123 volatile u32 fill;
124};
125
126struct leo_lc_ss1_krn {
127 u8 unknown;
128};
129
130struct leo_lc_ss1_usr {
131 u8 unknown;
132};
133
134struct leo_ld {
135 u8 xxx0[0xe00];
136 volatile u32 csr;
137 volatile u32 wid;
138 volatile u32 wmask;
139 volatile u32 widclip;
140 volatile u32 vclipmin;
141 volatile u32 vclipmax;
142 volatile u32 pickmin; /* SS1 only */
143 volatile u32 pickmax; /* SS1 only */
144 volatile u32 fg;
145 volatile u32 bg;
146 volatile u32 src; /* Copy/Scroll (SS0 only) */
147 volatile u32 dst; /* Copy/Scroll/Fill (SS0 only) */
148 volatile u32 extent; /* Copy/Scroll/Fill size (SS0 only) */
149 u32 xxx1[3];
150 volatile u32 setsem; /* SS1 only */
151 volatile u32 clrsem; /* SS1 only */
152 volatile u32 clrpick; /* SS1 only */
153 volatile u32 clrdat; /* SS1 only */
154 volatile u32 alpha; /* SS1 only */
155 u8 xxx2[0x2c];
156 volatile u32 winbg;
157 volatile u32 planemask;
158 volatile u32 rop;
159 volatile u32 z;
160 volatile u32 dczf; /* SS1 only */
161 volatile u32 dczb; /* SS1 only */
162 volatile u32 dcs; /* SS1 only */
163 volatile u32 dczs; /* SS1 only */
164 volatile u32 pickfb; /* SS1 only */
165 volatile u32 pickbb; /* SS1 only */
166 volatile u32 dcfc; /* SS1 only */
167 volatile u32 forcecol; /* SS1 only */
168 volatile u32 door[8]; /* SS1 only */
169 volatile u32 pick[5]; /* SS1 only */
170};
171
172#define LEO_SS1_MISC_ENABLE 0x00000001
173#define LEO_SS1_MISC_STEREO 0x00000002
174struct leo_ld_ss1 {
175 u8 xxx0[0xef4];
176 volatile u32 ss1_misc;
177};
178
179struct leo_ld_gbl {
180 u8 unknown;
181};
182
183struct leo_par {
184 spinlock_t lock;
185 struct leo_lx_krn __iomem *lx_krn;
186 struct leo_lc_ss0_usr __iomem *lc_ss0_usr;
187 struct leo_ld_ss0 __iomem *ld_ss0;
188 struct leo_ld_ss1 __iomem *ld_ss1;
189 struct leo_cursor __iomem *cursor;
190 u32 extent;
191 u32 clut_data[256];
192
193 u32 flags;
194#define LEO_FLAG_BLANKED 0x00000001
195
196 unsigned long physbase;
197 unsigned long fbsize;
198
199 struct sbus_dev *sdev;
200};
201
202static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
203{
204 int i;
205
206 for (i = 0;
207 (sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) && i < 300000;
208 i++)
209 udelay (1); /* Busy wait at most 0.3 sec */
210 return;
211}
212
213/**
214 * leo_setcolreg - Optional function. Sets a color register.
215 * @regno: boolean, 0 copy local, 1 get_user() function
216 * @red: frame buffer colormap structure
217 * @green: The green value which can be up to 16 bits wide
218 * @blue: The blue value which can be up to 16 bits wide.
219 * @transp: If supported the alpha value which can be up to 16 bits wide.
220 * @info: frame buffer info structure
221 */
222static int leo_setcolreg(unsigned regno,
223 unsigned red, unsigned green, unsigned blue,
224 unsigned transp, struct fb_info *info)
225{
226 struct leo_par *par = (struct leo_par *) info->par;
227 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
228 unsigned long flags;
229 u32 val;
230 int i;
231
232 if (regno >= 256)
233 return 1;
234
235 red >>= 8;
236 green >>= 8;
237 blue >>= 8;
238
239 par->clut_data[regno] = red | (green << 8) | (blue << 16);
240
241 spin_lock_irqsave(&par->lock, flags);
242
243 leo_wait(lx_krn);
244
245 sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
246 for (i = 0; i < 256; i++)
247 sbus_writel(par->clut_data[i], &lx_krn->krn_value);
248 sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
249
250 val = sbus_readl(&lx_krn->krn_csr);
251 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
252 sbus_writel(val, &lx_krn->krn_csr);
253
254 spin_unlock_irqrestore(&par->lock, flags);
255
256 return 0;
257}
258
259/**
260 * leo_blank - Optional function. Blanks the display.
261 * @blank_mode: the blank mode we want.
262 * @info: frame buffer structure that represents a single frame buffer
263 */
264static int leo_blank(int blank, struct fb_info *info)
265{
266 struct leo_par *par = (struct leo_par *) info->par;
267 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
268 unsigned long flags;
269 u32 val;
270
271 spin_lock_irqsave(&par->lock, flags);
272
273 switch (blank) {
274 case FB_BLANK_UNBLANK: /* Unblanking */
275 val = sbus_readl(&lx_krn->krn_csr);
276 val |= LEO_KRN_CSR_ENABLE;
277 sbus_writel(val, &lx_krn->krn_csr);
278 par->flags &= ~LEO_FLAG_BLANKED;
279 break;
280
281 case FB_BLANK_NORMAL: /* Normal blanking */
282 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
283 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
284 case FB_BLANK_POWERDOWN: /* Poweroff */
285 val = sbus_readl(&lx_krn->krn_csr);
286 val &= ~LEO_KRN_CSR_ENABLE;
287 sbus_writel(val, &lx_krn->krn_csr);
288 par->flags |= LEO_FLAG_BLANKED;
289 break;
290 }
291
292 spin_unlock_irqrestore(&par->lock, flags);
293
294 return 0;
295}
296
297static struct sbus_mmap_map leo_mmap_map[] = {
298 {
299 .voff = LEO_SS0_MAP,
300 .poff = LEO_OFF_SS0,
301 .size = 0x800000
302 },
303 {
304 .voff = LEO_LC_SS0_USR_MAP,
305 .poff = LEO_OFF_LC_SS0_USR,
306 .size = 0x1000
307 },
308 {
309 .voff = LEO_LD_SS0_MAP,
310 .poff = LEO_OFF_LD_SS0,
311 .size = 0x1000
312 },
313 {
314 .voff = LEO_LX_CURSOR_MAP,
315 .poff = LEO_OFF_LX_CURSOR,
316 .size = 0x1000
317 },
318 {
319 .voff = LEO_SS1_MAP,
320 .poff = LEO_OFF_SS1,
321 .size = 0x800000
322 },
323 {
324 .voff = LEO_LC_SS1_USR_MAP,
325 .poff = LEO_OFF_LC_SS1_USR,
326 .size = 0x1000
327 },
328 {
329 .voff = LEO_LD_SS1_MAP,
330 .poff = LEO_OFF_LD_SS1,
331 .size = 0x1000
332 },
333 {
334 .voff = LEO_UNK_MAP,
335 .poff = LEO_OFF_UNK,
336 .size = 0x1000
337 },
338 {
339 .voff = LEO_LX_KRN_MAP,
340 .poff = LEO_OFF_LX_KRN,
341 .size = 0x1000
342 },
343 {
344 .voff = LEO_LC_SS0_KRN_MAP,
345 .poff = LEO_OFF_LC_SS0_KRN,
346 .size = 0x1000
347 },
348 {
349 .voff = LEO_LC_SS1_KRN_MAP,
350 .poff = LEO_OFF_LC_SS1_KRN,
351 .size = 0x1000
352 },
353 {
354 .voff = LEO_LD_GBL_MAP,
355 .poff = LEO_OFF_LD_GBL,
356 .size = 0x1000
357 },
358 {
359 .voff = LEO_UNK2_MAP,
360 .poff = LEO_OFF_UNK2,
361 .size = 0x100000
362 },
363 { .size = 0 }
364};
365
366static int leo_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
367{
368 struct leo_par *par = (struct leo_par *)info->par;
369
370 return sbusfb_mmap_helper(leo_mmap_map,
371 par->physbase, par->fbsize,
372 par->sdev->reg_addrs[0].which_io,
373 vma);
374}
375
376static int leo_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
377 unsigned long arg, struct fb_info *info)
378{
379 struct leo_par *par = (struct leo_par *) info->par;
380
381 return sbusfb_ioctl_helper(cmd, arg, info,
382 FBTYPE_SUNLEO, 32, par->fbsize);
383}
384
385/*
386 * Initialisation
387 */
388
389static void
390leo_init_fix(struct fb_info *info)
391{
392 struct leo_par *par = (struct leo_par *)info->par;
393
394 strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));
395
396 info->fix.type = FB_TYPE_PACKED_PIXELS;
397 info->fix.visual = FB_VISUAL_TRUECOLOR;
398
399 info->fix.line_length = 8192;
400
401 info->fix.accel = FB_ACCEL_SUN_LEO;
402}
403
404static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
405{
406 struct leo_par *par = (struct leo_par *) info->par;
407 struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
408 struct fb_wid_item *wi;
409 unsigned long flags;
410 u32 val;
411 int i, j;
412
413 spin_lock_irqsave(&par->lock, flags);
414
415 leo_wait(lx_krn);
416
417 for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
418 switch(wi->wi_type) {
419 case FB_WID_DBL_8:
420 j = (wi->wi_index & 0xf) + 0x40;
421 break;
422
423 case FB_WID_DBL_24:
424 j = wi->wi_index & 0x3f;
425 break;
426
427 default:
428 continue;
429 };
430 sbus_writel(0x5800 + j, &lx_krn->krn_type);
431 sbus_writel(wi->wi_values[0], &lx_krn->krn_value);
432 }
433 sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
434
435 val = sbus_readl(&lx_krn->krn_csr);
436 val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
437 sbus_writel(val, &lx_krn->krn_csr);
438
439 spin_unlock_irqrestore(&par->lock, flags);
440}
441
442static void leo_init_wids(struct fb_info *info)
443{
444 struct fb_wid_item wi;
445 struct fb_wid_list wl;
446
447 wl.wl_count = 1;
448 wl.wl_list = &wi;
449 wi.wi_type = FB_WID_DBL_8;
450 wi.wi_index = 0;
451 wi.wi_values [0] = 0x2c0;
452 leo_wid_put(info, &wl);
453 wi.wi_index = 1;
454 wi.wi_values [0] = 0x30;
455 leo_wid_put(info, &wl);
456 wi.wi_index = 2;
457 wi.wi_values [0] = 0x20;
458 leo_wid_put(info, &wl);
459 wi.wi_type = FB_WID_DBL_24;
460 wi.wi_index = 1;
461 wi.wi_values [0] = 0x30;
462 leo_wid_put(info, &wl);
463
464}
465
466static void leo_switch_from_graph(struct fb_info *info)
467{
468 struct leo_par *par = (struct leo_par *) info->par;
469 struct leo_ld __iomem *ss = (struct leo_ld __iomem *) par->ld_ss0;
470 unsigned long flags;
471 u32 val;
472
473 spin_lock_irqsave(&par->lock, flags);
474
475 par->extent = ((info->var.xres - 1) |
476 ((info->var.yres - 1) << 16));
477
478 sbus_writel(0xffffffff, &ss->wid);
479 sbus_writel(0xffff, &ss->wmask);
480 sbus_writel(0, &ss->vclipmin);
481 sbus_writel(par->extent, &ss->vclipmax);
482 sbus_writel(0, &ss->fg);
483 sbus_writel(0xff000000, &ss->planemask);
484 sbus_writel(0x310850, &ss->rop);
485 sbus_writel(0, &ss->widclip);
486 sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11),
487 &par->lc_ss0_usr->extent);
488 sbus_writel(4, &par->lc_ss0_usr->addrspace);
489 sbus_writel(0x80000000, &par->lc_ss0_usr->fill);
490 sbus_writel(0, &par->lc_ss0_usr->fontt);
491 do {
492 val = sbus_readl(&par->lc_ss0_usr->csr);
493 } while (val & 0x20000000);
494
495 spin_unlock_irqrestore(&par->lock, flags);
496}
497
498static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
499{
500 /* We just use this to catch switches out of
501 * graphics mode.
502 */
503 leo_switch_from_graph(info);
504
505 if (var->xoffset || var->yoffset || var->vmode)
506 return -EINVAL;
507 return 0;
508}
509
510static void leo_init_hw(struct fb_info *info)
511{
512 struct leo_par *par = (struct leo_par *) info->par;
513 u32 val;
514
515 val = sbus_readl(&par->ld_ss1->ss1_misc);
516 val |= LEO_SS1_MISC_ENABLE;
517 sbus_writel(val, &par->ld_ss1->ss1_misc);
518
519 leo_switch_from_graph(info);
520}
521
522static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
523{
524 var->red.offset = 0;
525 var->red.length = 8;
526 var->green.offset = 8;
527 var->green.length = 8;
528 var->blue.offset = 16;
529 var->blue.length = 8;
530 var->transp.offset = 0;
531 var->transp.length = 0;
532}
533
534struct all_info {
535 struct fb_info info;
536 struct leo_par par;
537 struct list_head list;
538};
539static LIST_HEAD(leo_list);
540
541static void leo_init_one(struct sbus_dev *sdev)
542{
543 struct all_info *all;
544 int linebytes;
545
546 all = kmalloc(sizeof(*all), GFP_KERNEL);
547 if (!all) {
548 printk(KERN_ERR "leo: Cannot allocate memory.\n");
549 return;
550 }
551 memset(all, 0, sizeof(*all));
552
553 INIT_LIST_HEAD(&all->list);
554
555 spin_lock_init(&all->par.lock);
556 all->par.sdev = sdev;
557
558 all->par.physbase = sdev->reg_addrs[0].phys_addr;
559
560 sbusfb_fill_var(&all->info.var, sdev->prom_node, 32);
561 leo_fixup_var_rgb(&all->info.var);
562
563 linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
564 all->info.var.xres);
565 all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
566
567#ifdef CONFIG_SPARC32
568 all->info.screen_base = (char __iomem *)
569 prom_getintdefault(sdev->prom_node, "address", 0);
570#endif
571 if (!all->info.screen_base)
572 all->info.screen_base =
573 sbus_ioremap(&sdev->resource[0], LEO_OFF_SS0,
574 0x800000, "leo ram");
575
576 all->par.lc_ss0_usr =
577 sbus_ioremap(&sdev->resource[0], LEO_OFF_LC_SS0_USR,
578 0x1000, "leolc ss0usr");
579 all->par.ld_ss0 =
580 sbus_ioremap(&sdev->resource[0], LEO_OFF_LD_SS0,
581 0x1000, "leold ss0");
582 all->par.ld_ss1 =
583 sbus_ioremap(&sdev->resource[0], LEO_OFF_LD_SS1,
584 0x1000, "leold ss1");
585 all->par.lx_krn =
586 sbus_ioremap(&sdev->resource[0], LEO_OFF_LX_KRN,
587 0x1000, "leolx krn");
588 all->par.cursor =
589 sbus_ioremap(&sdev->resource[0], LEO_OFF_LX_CURSOR,
590 sizeof(struct leo_cursor), "leolx cursor");
591
592 all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
593 all->info.fbops = &leo_ops;
594 all->info.par = &all->par;
595
596 leo_init_wids(&all->info);
597 leo_init_hw(&all->info);
598
599 leo_blank(0, &all->info);
600
601 if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
602 printk(KERN_ERR "leo: Could not allocate color map.\n");
603 kfree(all);
604 return;
605 }
606
607 leo_init_fix(&all->info);
608
609 if (register_framebuffer(&all->info) < 0) {
610 printk(KERN_ERR "leo: Could not register framebuffer.\n");
611 fb_dealloc_cmap(&all->info.cmap);
612 kfree(all);
613 return;
614 }
615
616 list_add(&all->list, &leo_list);
617
618 printk("leo: %s at %lx:%lx\n",
619 sdev->prom_name,
620 (long) sdev->reg_addrs[0].which_io,
621 (long) sdev->reg_addrs[0].phys_addr);
622}
623
624int __init leo_init(void)
625{
626 struct sbus_bus *sbus;
627 struct sbus_dev *sdev;
628
629 if (fb_get_options("leofb", NULL))
630 return -ENODEV;
631
632 for_all_sbusdev(sdev, sbus) {
633 if (!strcmp(sdev->prom_name, "leo"))
634 leo_init_one(sdev);
635 }
636
637 return 0;
638}
639
640void __exit leo_exit(void)
641{
642 struct list_head *pos, *tmp;
643
644 list_for_each_safe(pos, tmp, &leo_list) {
645 struct all_info *all = list_entry(pos, typeof(*all), list);
646
647 unregister_framebuffer(&all->info);
648 fb_dealloc_cmap(&all->info.cmap);
649 kfree(all);
650 }
651}
652
653int __init
654leo_setup(char *arg)
655{
656 /* No cmdline options yet... */
657 return 0;
658}
659
660module_init(leo_init);
661#ifdef MODULE
662module_exit(leo_exit);
663#endif
664
665MODULE_DESCRIPTION("framebuffer driver for LEO chipsets");
666MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
667MODULE_LICENSE("GPL");