[ARM] rtc-pcf8583: don't use BCD_TO_BIN/BIN_TO_BCD
[linux-2.6] / drivers / video / cg14.c
1 /* cg14.c: CGFOURTEEN frame buffer driver
2  *
3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
4  * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
5  * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
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/prom.h>
22 #include <asm/of_device.h>
23 #include <asm/fbio.h>
24
25 #include "sbuslib.h"
26
27 /*
28  * Local functions.
29  */
30
31 static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
32                          unsigned, struct fb_info *);
33
34 static int cg14_mmap(struct fb_info *, struct vm_area_struct *);
35 static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
36 static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *);
37
38 /*
39  *  Frame buffer operations
40  */
41
42 static struct fb_ops cg14_ops = {
43         .owner                  = THIS_MODULE,
44         .fb_setcolreg           = cg14_setcolreg,
45         .fb_pan_display         = cg14_pan_display,
46         .fb_fillrect            = cfb_fillrect,
47         .fb_copyarea            = cfb_copyarea,
48         .fb_imageblit           = cfb_imageblit,
49         .fb_mmap                = cg14_mmap,
50         .fb_ioctl               = cg14_ioctl,
51 #ifdef CONFIG_COMPAT
52         .fb_compat_ioctl        = sbusfb_compat_ioctl,
53 #endif
54 };
55
56 #define CG14_MCR_INTENABLE_SHIFT        7
57 #define CG14_MCR_INTENABLE_MASK         0x80
58 #define CG14_MCR_VIDENABLE_SHIFT        6
59 #define CG14_MCR_VIDENABLE_MASK         0x40
60 #define CG14_MCR_PIXMODE_SHIFT          4
61 #define CG14_MCR_PIXMODE_MASK           0x30
62 #define CG14_MCR_TMR_SHIFT              2
63 #define CG14_MCR_TMR_MASK               0x0c
64 #define CG14_MCR_TMENABLE_SHIFT         1
65 #define CG14_MCR_TMENABLE_MASK          0x02
66 #define CG14_MCR_RESET_SHIFT            0
67 #define CG14_MCR_RESET_MASK             0x01
68 #define CG14_REV_REVISION_SHIFT         4
69 #define CG14_REV_REVISION_MASK          0xf0
70 #define CG14_REV_IMPL_SHIFT             0
71 #define CG14_REV_IMPL_MASK              0x0f
72 #define CG14_VBR_FRAMEBASE_SHIFT        12
73 #define CG14_VBR_FRAMEBASE_MASK         0x00fff000
74 #define CG14_VMCR1_SETUP_SHIFT          0
75 #define CG14_VMCR1_SETUP_MASK           0x000001ff
76 #define CG14_VMCR1_VCONFIG_SHIFT        9
77 #define CG14_VMCR1_VCONFIG_MASK         0x00000e00
78 #define CG14_VMCR2_REFRESH_SHIFT        0
79 #define CG14_VMCR2_REFRESH_MASK         0x00000001
80 #define CG14_VMCR2_TESTROWCNT_SHIFT     1
81 #define CG14_VMCR2_TESTROWCNT_MASK      0x00000002
82 #define CG14_VMCR2_FBCONFIG_SHIFT       2
83 #define CG14_VMCR2_FBCONFIG_MASK        0x0000000c
84 #define CG14_VCR_REFRESHREQ_SHIFT       0
85 #define CG14_VCR_REFRESHREQ_MASK        0x000003ff
86 #define CG14_VCR1_REFRESHENA_SHIFT      10
87 #define CG14_VCR1_REFRESHENA_MASK       0x00000400
88 #define CG14_VCA_CAD_SHIFT              0
89 #define CG14_VCA_CAD_MASK               0x000003ff
90 #define CG14_VCA_VERS_SHIFT             10
91 #define CG14_VCA_VERS_MASK              0x00000c00
92 #define CG14_VCA_RAMSPEED_SHIFT         12
93 #define CG14_VCA_RAMSPEED_MASK          0x00001000
94 #define CG14_VCA_8MB_SHIFT              13
95 #define CG14_VCA_8MB_MASK               0x00002000
96
97 #define CG14_MCR_PIXMODE_8              0
98 #define CG14_MCR_PIXMODE_16             2
99 #define CG14_MCR_PIXMODE_32             3
100
101 struct cg14_regs{
102         u8 mcr; /* Master Control Reg */
103         u8 ppr; /* Packed Pixel Reg */
104         u8 tms[2];      /* Test Mode Status Regs */
105         u8 msr; /* Master Status Reg */
106         u8 fsr; /* Fault Status Reg */
107         u8 rev; /* Revision & Impl */
108         u8 ccr; /* Clock Control Reg */
109         u32 tmr;        /* Test Mode Read Back */
110         u8 mod; /* Monitor Operation Data Reg */
111         u8 acr; /* Aux Control */
112         u8 xxx0[6];
113         u16 hct;        /* Hor Counter */
114         u16 vct;        /* Vert Counter */
115         u16 hbs;        /* Hor Blank Start */
116         u16 hbc;        /* Hor Blank Clear */
117         u16 hss;        /* Hor Sync Start */
118         u16 hsc;        /* Hor Sync Clear */
119         u16 csc;        /* Composite Sync Clear */
120         u16 vbs;        /* Vert Blank Start */
121         u16 vbc;        /* Vert Blank Clear */
122         u16 vss;        /* Vert Sync Start */
123         u16 vsc;        /* Vert Sync Clear */
124         u16 xcs;
125         u16 xcc;
126         u16 fsa;        /* Fault Status Address */
127         u16 adr;        /* Address Registers */
128         u8 xxx1[0xce];
129         u8 pcg[0x100]; /* Pixel Clock Generator */
130         u32 vbr;        /* Frame Base Row */
131         u32 vmcr;       /* VBC Master Control */
132         u32 vcr;        /* VBC refresh */
133         u32 vca;        /* VBC Config */
134 };
135
136 #define CG14_CCR_ENABLE 0x04
137 #define CG14_CCR_SELECT 0x02    /* HW/Full screen */
138
139 struct cg14_cursor {
140         u32 cpl0[32];   /* Enable plane 0 */
141         u32 cpl1[32];  /* Color selection plane */
142         u8 ccr; /* Cursor Control Reg */
143         u8 xxx0[3];
144         u16 cursx;      /* Cursor x,y position */
145         u16 cursy;      /* Cursor x,y position */
146         u32 color0;
147         u32 color1;
148         u32 xxx1[0x1bc];
149         u32 cpl0i[32];  /* Enable plane 0 autoinc */
150         u32 cpl1i[32]; /* Color selection autoinc */
151 };
152
153 struct cg14_dac {
154         u8 addr;        /* Address Register */
155         u8 xxx0[255];
156         u8 glut;        /* Gamma table */
157         u8 xxx1[255];
158         u8 select;      /* Register Select */
159         u8 xxx2[255];
160         u8 mode;        /* Mode Register */
161 };
162
163 struct cg14_xlut{
164         u8 x_xlut [256];
165         u8 x_xlutd [256];
166         u8 xxx0[0x600];
167         u8 x_xlut_inc [256];
168         u8 x_xlutd_inc [256];
169 };
170
171 /* Color look up table (clut) */
172 /* Each one of these arrays hold the color lookup table (for 256
173  * colors) for each MDI page (I assume then there should be 4 MDI
174  * pages, I still wonder what they are.  I have seen NeXTStep split
175  * the screen in four parts, while operating in 24 bits mode.  Each
176  * integer holds 4 values: alpha value (transparency channel, thanks
177  * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
178  *
179  * I currently use the clut instead of the Xlut
180  */
181 struct cg14_clut {
182         u32 c_clut [256];
183         u32 c_clutd [256];    /* i wonder what the 'd' is for */
184         u32 c_clut_inc [256];
185         u32 c_clutd_inc [256];
186 };
187
188 #define CG14_MMAP_ENTRIES       16
189
190 struct cg14_par {
191         spinlock_t              lock;
192         struct cg14_regs        __iomem *regs;
193         struct cg14_clut        __iomem *clut;
194         struct cg14_cursor      __iomem *cursor;
195
196         u32                     flags;
197 #define CG14_FLAG_BLANKED       0x00000001
198
199         unsigned long           physbase;
200         unsigned long           iospace;
201         unsigned long           fbsize;
202
203         struct sbus_mmap_map    mmap_map[CG14_MMAP_ENTRIES];
204
205         int                     mode;
206         int                     ramsize;
207 };
208
209 static void __cg14_reset(struct cg14_par *par)
210 {
211         struct cg14_regs __iomem *regs = par->regs;
212         u8 val;
213
214         val = sbus_readb(&regs->mcr);
215         val &= ~(CG14_MCR_PIXMODE_MASK);
216         sbus_writeb(val, &regs->mcr);
217 }
218
219 static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
220 {
221         struct cg14_par *par = (struct cg14_par *) info->par;
222         unsigned long flags;
223
224         /* We just use this to catch switches out of
225          * graphics mode.
226          */
227         spin_lock_irqsave(&par->lock, flags);
228         __cg14_reset(par);
229         spin_unlock_irqrestore(&par->lock, flags);
230
231         if (var->xoffset || var->yoffset || var->vmode)
232                 return -EINVAL;
233         return 0;
234 }
235
236 /**
237  *      cg14_setcolreg - Optional function. Sets a color register.
238  *      @regno: boolean, 0 copy local, 1 get_user() function
239  *      @red: frame buffer colormap structure
240  *      @green: The green value which can be up to 16 bits wide
241  *      @blue:  The blue value which can be up to 16 bits wide.
242  *      @transp: If supported the alpha value which can be up to 16 bits wide.
243  *      @info: frame buffer info structure
244  */
245 static int cg14_setcolreg(unsigned regno,
246                           unsigned red, unsigned green, unsigned blue,
247                           unsigned transp, struct fb_info *info)
248 {
249         struct cg14_par *par = (struct cg14_par *) info->par;
250         struct cg14_clut __iomem *clut = par->clut;
251         unsigned long flags;
252         u32 val;
253
254         if (regno >= 256)
255                 return 1;
256
257         red >>= 8;
258         green >>= 8;
259         blue >>= 8;
260         val = (red | (green << 8) | (blue << 16));
261
262         spin_lock_irqsave(&par->lock, flags);
263         sbus_writel(val, &clut->c_clut[regno]);
264         spin_unlock_irqrestore(&par->lock, flags);
265
266         return 0;
267 }
268
269 static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma)
270 {
271         struct cg14_par *par = (struct cg14_par *) info->par;
272
273         return sbusfb_mmap_helper(par->mmap_map,
274                                   par->physbase, par->fbsize,
275                                   par->iospace, vma);
276 }
277
278 static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
279 {
280         struct cg14_par *par = (struct cg14_par *) info->par;
281         struct cg14_regs __iomem *regs = par->regs;
282         struct mdi_cfginfo kmdi, __user *mdii;
283         unsigned long flags;
284         int cur_mode, mode, ret = 0;
285
286         switch (cmd) {
287         case MDI_RESET:
288                 spin_lock_irqsave(&par->lock, flags);
289                 __cg14_reset(par);
290                 spin_unlock_irqrestore(&par->lock, flags);
291                 break;
292
293         case MDI_GET_CFGINFO:
294                 memset(&kmdi, 0, sizeof(kmdi));
295
296                 spin_lock_irqsave(&par->lock, flags);
297                 kmdi.mdi_type = FBTYPE_MDICOLOR;
298                 kmdi.mdi_height = info->var.yres;
299                 kmdi.mdi_width = info->var.xres;
300                 kmdi.mdi_mode = par->mode;
301                 kmdi.mdi_pixfreq = 72; /* FIXME */
302                 kmdi.mdi_size = par->ramsize;
303                 spin_unlock_irqrestore(&par->lock, flags);
304
305                 mdii = (struct mdi_cfginfo __user *) arg;
306                 if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
307                         ret = -EFAULT;
308                 break;
309
310         case MDI_SET_PIXELMODE:
311                 if (get_user(mode, (int __user *) arg)) {
312                         ret = -EFAULT;
313                         break;
314                 }
315
316                 spin_lock_irqsave(&par->lock, flags);
317                 cur_mode = sbus_readb(&regs->mcr);
318                 cur_mode &= ~CG14_MCR_PIXMODE_MASK;
319                 switch(mode) {
320                 case MDI_32_PIX:
321                         cur_mode |= (CG14_MCR_PIXMODE_32 <<
322                                      CG14_MCR_PIXMODE_SHIFT);
323                         break;
324
325                 case MDI_16_PIX:
326                         cur_mode |= (CG14_MCR_PIXMODE_16 <<
327                                      CG14_MCR_PIXMODE_SHIFT);
328                         break;
329
330                 case MDI_8_PIX:
331                         break;
332
333                 default:
334                         ret = -ENOSYS;
335                         break;
336                 };
337                 if (!ret) {
338                         sbus_writeb(cur_mode, &regs->mcr);
339                         par->mode = mode;
340                 }
341                 spin_unlock_irqrestore(&par->lock, flags);
342                 break;
343
344         default:
345                 ret = sbusfb_ioctl_helper(cmd, arg, info,
346                                           FBTYPE_MDICOLOR, 8, par->fbsize);
347                 break;
348         };
349
350         return ret;
351 }
352
353 /*
354  *  Initialisation
355  */
356
357 static void cg14_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
358 {
359         const char *name = dp->name;
360
361         strlcpy(info->fix.id, name, sizeof(info->fix.id));
362
363         info->fix.type = FB_TYPE_PACKED_PIXELS;
364         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
365
366         info->fix.line_length = linebytes;
367
368         info->fix.accel = FB_ACCEL_SUN_CG14;
369 }
370
371 static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] __initdata = {
372         {
373                 .voff   = CG14_REGS,
374                 .poff   = 0x80000000,
375                 .size   = 0x1000
376         },
377         {
378                 .voff   = CG14_XLUT,
379                 .poff   = 0x80003000,
380                 .size   = 0x1000
381         },
382         {
383                 .voff   = CG14_CLUT1,
384                 .poff   = 0x80004000,
385                 .size   = 0x1000
386         },
387         {
388                 .voff   = CG14_CLUT2,
389                 .poff   = 0x80005000,
390                 .size   = 0x1000
391         },
392         {
393                 .voff   = CG14_CLUT3,
394                 .poff   = 0x80006000,
395                 .size   = 0x1000
396         },
397         {
398                 .voff   = CG3_MMAP_OFFSET - 0x7000,
399                 .poff   = 0x80000000,
400                 .size   = 0x7000
401         },
402         {
403                 .voff   = CG3_MMAP_OFFSET,
404                 .poff   = 0x00000000,
405                 .size   = SBUS_MMAP_FBSIZE(1)
406         },
407         {
408                 .voff   = MDI_CURSOR_MAP,
409                 .poff   = 0x80001000,
410                 .size   = 0x1000
411         },
412         {
413                 .voff   = MDI_CHUNKY_BGR_MAP,
414                 .poff   = 0x01000000,
415                 .size   = 0x400000
416         },
417         {
418                 .voff   = MDI_PLANAR_X16_MAP,
419                 .poff   = 0x02000000,
420                 .size   = 0x200000
421         },
422         {
423                 .voff   = MDI_PLANAR_C16_MAP,
424                 .poff   = 0x02800000,
425                 .size   = 0x200000
426         },
427         {
428                 .voff   = MDI_PLANAR_X32_MAP,
429                 .poff   = 0x03000000,
430                 .size   = 0x100000
431         },
432         {
433                 .voff   = MDI_PLANAR_B32_MAP,
434                 .poff   = 0x03400000,
435                 .size   = 0x100000
436         },
437         {
438                 .voff   = MDI_PLANAR_G32_MAP,
439                 .poff   = 0x03800000,
440                 .size   = 0x100000
441         },
442         {
443                 .voff   = MDI_PLANAR_R32_MAP,
444                 .poff   = 0x03c00000,
445                 .size   = 0x100000
446         },
447         { .size = 0 }
448 };
449
450 struct all_info {
451         struct fb_info info;
452         struct cg14_par par;
453 };
454
455 static void cg14_unmap_regs(struct of_device *op, struct all_info *all)
456 {
457         if (all->par.regs)
458                 of_iounmap(&op->resource[0],
459                            all->par.regs, sizeof(struct cg14_regs));
460         if (all->par.clut)
461                 of_iounmap(&op->resource[0],
462                            all->par.clut, sizeof(struct cg14_clut));
463         if (all->par.cursor)
464                 of_iounmap(&op->resource[0],
465                            all->par.cursor, sizeof(struct cg14_cursor));
466         if (all->info.screen_base)
467                 of_iounmap(&op->resource[1],
468                            all->info.screen_base, all->par.fbsize);
469 }
470
471 static int __devinit cg14_init_one(struct of_device *op)
472 {
473         struct device_node *dp = op->node;
474         struct all_info *all;
475         int is_8mb, linebytes, i, err;
476
477         all = kzalloc(sizeof(*all), GFP_KERNEL);
478         if (!all)
479                 return -ENOMEM;
480
481         spin_lock_init(&all->par.lock);
482
483         sbusfb_fill_var(&all->info.var, dp->node, 8);
484         all->info.var.red.length = 8;
485         all->info.var.green.length = 8;
486         all->info.var.blue.length = 8;
487
488         linebytes = of_getintprop_default(dp, "linebytes",
489                                           all->info.var.xres);
490         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
491
492         if (!strcmp(dp->parent->name, "sbus") ||
493             !strcmp(dp->parent->name, "sbi")) {
494                 all->par.physbase = op->resource[0].start;
495                 all->par.iospace = op->resource[0].flags & IORESOURCE_BITS;
496         } else {
497                 all->par.physbase = op->resource[1].start;
498                 all->par.iospace = op->resource[0].flags & IORESOURCE_BITS;
499         }
500
501         all->par.regs = of_ioremap(&op->resource[0], 0,
502                                    sizeof(struct cg14_regs), "cg14 regs");
503         all->par.clut = of_ioremap(&op->resource[0], CG14_CLUT1,
504                                    sizeof(struct cg14_clut), "cg14 clut");
505         all->par.cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS,
506                                    sizeof(struct cg14_cursor), "cg14 cursor");
507
508         all->info.screen_base = of_ioremap(&op->resource[1], 0,
509                                            all->par.fbsize, "cg14 ram");
510
511         if (!all->par.regs || !all->par.clut || !all->par.cursor ||
512             !all->info.screen_base)
513                 cg14_unmap_regs(op, all);
514
515         is_8mb = (((op->resource[1].end - op->resource[1].start) + 1) ==
516                   (8 * 1024 * 1024));
517
518         BUILD_BUG_ON(sizeof(all->par.mmap_map) != sizeof(__cg14_mmap_map));
519                 
520         memcpy(&all->par.mmap_map, &__cg14_mmap_map,
521                sizeof(all->par.mmap_map));
522
523         for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
524                 struct sbus_mmap_map *map = &all->par.mmap_map[i];
525
526                 if (!map->size)
527                         break;
528                 if (map->poff & 0x80000000)
529                         map->poff = (map->poff & 0x7fffffff) +
530                                 (op->resource[0].start -
531                                  op->resource[1].start);
532                 if (is_8mb &&
533                     map->size >= 0x100000 &&
534                     map->size <= 0x400000)
535                         map->size *= 2;
536         }
537
538         all->par.mode = MDI_8_PIX;
539         all->par.ramsize = (is_8mb ? 0x800000 : 0x400000);
540
541         all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
542         all->info.fbops = &cg14_ops;
543         all->info.par = &all->par;
544
545         __cg14_reset(&all->par);
546
547         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
548                 cg14_unmap_regs(op, all);
549                 kfree(all);
550                 return -ENOMEM;
551         }
552         fb_set_cmap(&all->info.cmap, &all->info);
553
554         cg14_init_fix(&all->info, linebytes, dp);
555
556         err = register_framebuffer(&all->info);
557         if (err < 0) {
558                 fb_dealloc_cmap(&all->info.cmap);
559                 cg14_unmap_regs(op, all);
560                 kfree(all);
561                 return err;
562         }
563
564         dev_set_drvdata(&op->dev, all);
565
566         printk("%s: cgfourteen at %lx:%lx, %dMB\n",
567                dp->full_name,
568                all->par.iospace, all->par.physbase,
569                all->par.ramsize >> 20);
570
571         return 0;
572 }
573
574 static int __devinit cg14_probe(struct of_device *dev, const struct of_device_id *match)
575 {
576         struct of_device *op = to_of_device(&dev->dev);
577
578         return cg14_init_one(op);
579 }
580
581 static int __devexit cg14_remove(struct of_device *op)
582 {
583         struct all_info *all = dev_get_drvdata(&op->dev);
584
585         unregister_framebuffer(&all->info);
586         fb_dealloc_cmap(&all->info.cmap);
587
588         cg14_unmap_regs(op, all);
589
590         kfree(all);
591
592         dev_set_drvdata(&op->dev, NULL);
593
594         return 0;
595 }
596
597 static struct of_device_id cg14_match[] = {
598         {
599                 .name = "cgfourteen",
600         },
601         {},
602 };
603 MODULE_DEVICE_TABLE(of, cg14_match);
604
605 static struct of_platform_driver cg14_driver = {
606         .name           = "cg14",
607         .match_table    = cg14_match,
608         .probe          = cg14_probe,
609         .remove         = __devexit_p(cg14_remove),
610 };
611
612 int __init cg14_init(void)
613 {
614         if (fb_get_options("cg14fb", NULL))
615                 return -ENODEV;
616
617         return of_register_driver(&cg14_driver, &of_bus_type);
618 }
619
620 void __exit cg14_exit(void)
621 {
622         of_unregister_driver(&cg14_driver);
623 }
624
625 module_init(cg14_init);
626 module_exit(cg14_exit);
627
628 MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
629 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
630 MODULE_VERSION("2.0");
631 MODULE_LICENSE("GPL");