Merge commit 'linux-pnfs/nfs41-for-2.6.31' into nfsv41-for-2.6.31
[linux-2.6] / drivers / video / tcx.c
1 /* tcx.c: TCX 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) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6  * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
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/slab.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_device.h>
21
22 #include <asm/io.h>
23 #include <asm/fbio.h>
24
25 #include "sbuslib.h"
26
27 /*
28  * Local functions.
29  */
30
31 static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
32                          unsigned, struct fb_info *);
33 static int tcx_blank(int, struct fb_info *);
34
35 static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
36 static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
37 static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
38
39 /*
40  *  Frame buffer operations
41  */
42
43 static struct fb_ops tcx_ops = {
44         .owner                  = THIS_MODULE,
45         .fb_setcolreg           = tcx_setcolreg,
46         .fb_blank               = tcx_blank,
47         .fb_pan_display         = tcx_pan_display,
48         .fb_fillrect            = cfb_fillrect,
49         .fb_copyarea            = cfb_copyarea,
50         .fb_imageblit           = cfb_imageblit,
51         .fb_mmap                = tcx_mmap,
52         .fb_ioctl               = tcx_ioctl,
53 #ifdef CONFIG_COMPAT
54         .fb_compat_ioctl        = sbusfb_compat_ioctl,
55 #endif
56 };
57
58 /* THC definitions */
59 #define TCX_THC_MISC_REV_SHIFT       16
60 #define TCX_THC_MISC_REV_MASK        15
61 #define TCX_THC_MISC_VSYNC_DIS       (1 << 25)
62 #define TCX_THC_MISC_HSYNC_DIS       (1 << 24)
63 #define TCX_THC_MISC_RESET           (1 << 12)
64 #define TCX_THC_MISC_VIDEO           (1 << 10)
65 #define TCX_THC_MISC_SYNC            (1 << 9)
66 #define TCX_THC_MISC_VSYNC           (1 << 8)
67 #define TCX_THC_MISC_SYNC_ENAB       (1 << 7)
68 #define TCX_THC_MISC_CURS_RES        (1 << 6)
69 #define TCX_THC_MISC_INT_ENAB        (1 << 5)
70 #define TCX_THC_MISC_INT             (1 << 4)
71 #define TCX_THC_MISC_INIT            0x9f
72 #define TCX_THC_REV_REV_SHIFT        20
73 #define TCX_THC_REV_REV_MASK         15
74 #define TCX_THC_REV_MINREV_SHIFT     28
75 #define TCX_THC_REV_MINREV_MASK      15
76
77 /* The contents are unknown */
78 struct tcx_tec {
79         u32 tec_matrix;
80         u32 tec_clip;
81         u32 tec_vdc;
82 };
83
84 struct tcx_thc {
85         u32 thc_rev;
86         u32 thc_pad0[511];
87         u32 thc_hs;             /* hsync timing */
88         u32 thc_hsdvs;
89         u32 thc_hd;
90         u32 thc_vs;             /* vsync timing */
91         u32 thc_vd;
92         u32 thc_refresh;
93         u32 thc_misc;
94         u32 thc_pad1[56];
95         u32 thc_cursxy; /* cursor x,y position (16 bits each) */
96         u32 thc_cursmask[32];   /* cursor mask bits */
97         u32 thc_cursbits[32];   /* what to show where mask enabled */
98 };
99
100 struct bt_regs {
101         u32 addr;
102         u32 color_map;
103         u32 control;
104         u32 cursor;
105 };
106
107 #define TCX_MMAP_ENTRIES 14
108
109 struct tcx_par {
110         spinlock_t              lock;
111         struct bt_regs          __iomem *bt;
112         struct tcx_thc          __iomem *thc;
113         struct tcx_tec          __iomem *tec;
114         u32                     __iomem *cplane;
115
116         u32                     flags;
117 #define TCX_FLAG_BLANKED        0x00000001
118
119         unsigned long           which_io;
120
121         struct sbus_mmap_map    mmap_map[TCX_MMAP_ENTRIES];
122         int                     lowdepth;
123 };
124
125 /* Reset control plane so that WID is 8-bit plane. */
126 static void __tcx_set_control_plane(struct fb_info *info)
127 {
128         struct tcx_par *par = info->par;
129         u32 __iomem *p, *pend;
130
131         if (par->lowdepth)
132                 return;
133
134         p = par->cplane;
135         if (p == NULL)
136                 return;
137         for (pend = p + info->fix.smem_len; p < pend; p++) {
138                 u32 tmp = sbus_readl(p);
139
140                 tmp &= 0xffffff;
141                 sbus_writel(tmp, p);
142         }
143 }
144
145 static void tcx_reset(struct fb_info *info)
146 {
147         struct tcx_par *par = (struct tcx_par *) info->par;
148         unsigned long flags;
149
150         spin_lock_irqsave(&par->lock, flags);
151         __tcx_set_control_plane(info);
152         spin_unlock_irqrestore(&par->lock, flags);
153 }
154
155 static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
156 {
157         tcx_reset(info);
158         return 0;
159 }
160
161 /**
162  *      tcx_setcolreg - Optional function. Sets a color register.
163  *      @regno: boolean, 0 copy local, 1 get_user() function
164  *      @red: frame buffer colormap structure
165  *      @green: The green value which can be up to 16 bits wide
166  *      @blue:  The blue value which can be up to 16 bits wide.
167  *      @transp: If supported the alpha value which can be up to 16 bits wide.
168  *      @info: frame buffer info structure
169  */
170 static int tcx_setcolreg(unsigned regno,
171                          unsigned red, unsigned green, unsigned blue,
172                          unsigned transp, struct fb_info *info)
173 {
174         struct tcx_par *par = (struct tcx_par *) info->par;
175         struct bt_regs __iomem *bt = par->bt;
176         unsigned long flags;
177
178         if (regno >= 256)
179                 return 1;
180
181         red >>= 8;
182         green >>= 8;
183         blue >>= 8;
184
185         spin_lock_irqsave(&par->lock, flags);
186
187         sbus_writel(regno << 24, &bt->addr);
188         sbus_writel(red << 24, &bt->color_map);
189         sbus_writel(green << 24, &bt->color_map);
190         sbus_writel(blue << 24, &bt->color_map);
191
192         spin_unlock_irqrestore(&par->lock, flags);
193
194         return 0;
195 }
196
197 /**
198  *      tcx_blank - Optional function.  Blanks the display.
199  *      @blank_mode: the blank mode we want.
200  *      @info: frame buffer structure that represents a single frame buffer
201  */
202 static int
203 tcx_blank(int blank, struct fb_info *info)
204 {
205         struct tcx_par *par = (struct tcx_par *) info->par;
206         struct tcx_thc __iomem *thc = par->thc;
207         unsigned long flags;
208         u32 val;
209
210         spin_lock_irqsave(&par->lock, flags);
211
212         val = sbus_readl(&thc->thc_misc);
213
214         switch (blank) {
215         case FB_BLANK_UNBLANK: /* Unblanking */
216                 val &= ~(TCX_THC_MISC_VSYNC_DIS |
217                          TCX_THC_MISC_HSYNC_DIS);
218                 val |= TCX_THC_MISC_VIDEO;
219                 par->flags &= ~TCX_FLAG_BLANKED;
220                 break;
221
222         case FB_BLANK_NORMAL: /* Normal blanking */
223                 val &= ~TCX_THC_MISC_VIDEO;
224                 par->flags |= TCX_FLAG_BLANKED;
225                 break;
226
227         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
228                 val |= TCX_THC_MISC_VSYNC_DIS;
229                 break;
230         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
231                 val |= TCX_THC_MISC_HSYNC_DIS;
232                 break;
233
234         case FB_BLANK_POWERDOWN: /* Poweroff */
235                 break;
236         };
237
238         sbus_writel(val, &thc->thc_misc);
239
240         spin_unlock_irqrestore(&par->lock, flags);
241
242         return 0;
243 }
244
245 static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
246         {
247                 .voff   = TCX_RAM8BIT,
248                 .size   = SBUS_MMAP_FBSIZE(1)
249         },
250         {
251                 .voff   = TCX_RAM24BIT,
252                 .size   = SBUS_MMAP_FBSIZE(4)
253         },
254         {
255                 .voff   = TCX_UNK3,
256                 .size   = SBUS_MMAP_FBSIZE(8)
257         },
258         {
259                 .voff   = TCX_UNK4,
260                 .size   = SBUS_MMAP_FBSIZE(8)
261         },
262         {
263                 .voff   = TCX_CONTROLPLANE,
264                 .size   = SBUS_MMAP_FBSIZE(4)
265         },
266         {
267                 .voff   = TCX_UNK6,
268                 .size   = SBUS_MMAP_FBSIZE(8)
269         },
270         {
271                 .voff   = TCX_UNK7,
272                 .size   = SBUS_MMAP_FBSIZE(8)
273         },
274         {
275                 .voff   = TCX_TEC,
276                 .size   = PAGE_SIZE
277         },
278         {
279                 .voff   = TCX_BTREGS,
280                 .size   = PAGE_SIZE
281         },
282         {
283                 .voff   = TCX_THC,
284                 .size   = PAGE_SIZE
285         },
286         {
287                 .voff   = TCX_DHC,
288                 .size   = PAGE_SIZE
289         },
290         {
291                 .voff   = TCX_ALT,
292                 .size   = PAGE_SIZE
293         },
294         {
295                 .voff   = TCX_UNK2,
296                 .size   = 0x20000
297         },
298         { .size = 0 }
299 };
300
301 static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma)
302 {
303         struct tcx_par *par = (struct tcx_par *)info->par;
304
305         return sbusfb_mmap_helper(par->mmap_map,
306                                   info->fix.smem_start, info->fix.smem_len,
307                                   par->which_io, vma);
308 }
309
310 static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
311                      unsigned long arg)
312 {
313         struct tcx_par *par = (struct tcx_par *) info->par;
314
315         return sbusfb_ioctl_helper(cmd, arg, info,
316                                    FBTYPE_TCXCOLOR,
317                                    (par->lowdepth ? 8 : 24),
318                                    info->fix.smem_len);
319 }
320
321 /*
322  *  Initialisation
323  */
324
325 static void
326 tcx_init_fix(struct fb_info *info, int linebytes)
327 {
328         struct tcx_par *par = (struct tcx_par *)info->par;
329         const char *tcx_name;
330
331         if (par->lowdepth)
332                 tcx_name = "TCX8";
333         else
334                 tcx_name = "TCX24";
335
336         strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
337
338         info->fix.type = FB_TYPE_PACKED_PIXELS;
339         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
340
341         info->fix.line_length = linebytes;
342
343         info->fix.accel = FB_ACCEL_SUN_TCX;
344 }
345
346 static void tcx_unmap_regs(struct of_device *op, struct fb_info *info,
347                            struct tcx_par *par)
348 {
349         if (par->tec)
350                 of_iounmap(&op->resource[7],
351                            par->tec, sizeof(struct tcx_tec));
352         if (par->thc)
353                 of_iounmap(&op->resource[9],
354                            par->thc, sizeof(struct tcx_thc));
355         if (par->bt)
356                 of_iounmap(&op->resource[8],
357                            par->bt, sizeof(struct bt_regs));
358         if (par->cplane)
359                 of_iounmap(&op->resource[4],
360                            par->cplane, info->fix.smem_len * sizeof(u32));
361         if (info->screen_base)
362                 of_iounmap(&op->resource[0],
363                            info->screen_base, info->fix.smem_len);
364 }
365
366 static int __devinit tcx_probe(struct of_device *op,
367                                const struct of_device_id *match)
368 {
369         struct device_node *dp = op->node;
370         struct fb_info *info;
371         struct tcx_par *par;
372         int linebytes, i, err;
373
374         info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
375
376         err = -ENOMEM;
377         if (!info)
378                 goto out_err;
379         par = info->par;
380
381         spin_lock_init(&par->lock);
382
383         par->lowdepth =
384                 (of_find_property(dp, "tcx-8-bit", NULL) != NULL);
385
386         sbusfb_fill_var(&info->var, dp, 8);
387         info->var.red.length = 8;
388         info->var.green.length = 8;
389         info->var.blue.length = 8;
390
391         linebytes = of_getintprop_default(dp, "linebytes",
392                                           info->var.xres);
393         info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
394
395         par->tec = of_ioremap(&op->resource[7], 0,
396                                   sizeof(struct tcx_tec), "tcx tec");
397         par->thc = of_ioremap(&op->resource[9], 0,
398                                   sizeof(struct tcx_thc), "tcx thc");
399         par->bt = of_ioremap(&op->resource[8], 0,
400                                  sizeof(struct bt_regs), "tcx dac");
401         info->screen_base = of_ioremap(&op->resource[0], 0,
402                                            info->fix.smem_len, "tcx ram");
403         if (!par->tec || !par->thc ||
404             !par->bt || !info->screen_base)
405                 goto out_unmap_regs;
406
407         memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
408         if (!par->lowdepth) {
409                 par->cplane = of_ioremap(&op->resource[4], 0,
410                                              info->fix.smem_len * sizeof(u32),
411                                              "tcx cplane");
412                 if (!par->cplane)
413                         goto out_unmap_regs;
414         } else {
415                 par->mmap_map[1].size = SBUS_MMAP_EMPTY;
416                 par->mmap_map[4].size = SBUS_MMAP_EMPTY;
417                 par->mmap_map[5].size = SBUS_MMAP_EMPTY;
418                 par->mmap_map[6].size = SBUS_MMAP_EMPTY;
419         }
420
421         info->fix.smem_start = op->resource[0].start;
422         par->which_io = op->resource[0].flags & IORESOURCE_BITS;
423
424         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
425                 int j;
426
427                 switch (i) {
428                 case 10:
429                         j = 12;
430                         break;
431
432                 case 11: case 12:
433                         j = i - 1;
434                         break;
435
436                 default:
437                         j = i;
438                         break;
439                 };
440                 par->mmap_map[i].poff = op->resource[j].start;
441         }
442
443         info->flags = FBINFO_DEFAULT;
444         info->fbops = &tcx_ops;
445
446         /* Initialize brooktree DAC. */
447         sbus_writel(0x04 << 24, &par->bt->addr);         /* color planes */
448         sbus_writel(0xff << 24, &par->bt->control);
449         sbus_writel(0x05 << 24, &par->bt->addr);
450         sbus_writel(0x00 << 24, &par->bt->control);
451         sbus_writel(0x06 << 24, &par->bt->addr);         /* overlay plane */
452         sbus_writel(0x73 << 24, &par->bt->control);
453         sbus_writel(0x07 << 24, &par->bt->addr);
454         sbus_writel(0x00 << 24, &par->bt->control);
455
456         tcx_reset(info);
457
458         tcx_blank(FB_BLANK_UNBLANK, info);
459
460         if (fb_alloc_cmap(&info->cmap, 256, 0))
461                 goto out_unmap_regs;
462
463         fb_set_cmap(&info->cmap, info);
464         tcx_init_fix(info, linebytes);
465
466         err = register_framebuffer(info);
467         if (err < 0)
468                 goto out_dealloc_cmap;
469
470         dev_set_drvdata(&op->dev, info);
471
472         printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n",
473                dp->full_name,
474                par->which_io,
475                info->fix.smem_start,
476                par->lowdepth ? "8-bit only" : "24-bit depth");
477
478         return 0;
479
480 out_dealloc_cmap:
481         fb_dealloc_cmap(&info->cmap);
482
483 out_unmap_regs:
484         tcx_unmap_regs(op, info, par);
485
486 out_err:
487         return err;
488 }
489
490 static int __devexit tcx_remove(struct of_device *op)
491 {
492         struct fb_info *info = dev_get_drvdata(&op->dev);
493         struct tcx_par *par = info->par;
494
495         unregister_framebuffer(info);
496         fb_dealloc_cmap(&info->cmap);
497
498         tcx_unmap_regs(op, info, par);
499
500         framebuffer_release(info);
501
502         dev_set_drvdata(&op->dev, NULL);
503
504         return 0;
505 }
506
507 static const struct of_device_id tcx_match[] = {
508         {
509                 .name = "SUNW,tcx",
510         },
511         {},
512 };
513 MODULE_DEVICE_TABLE(of, tcx_match);
514
515 static struct of_platform_driver tcx_driver = {
516         .name           = "tcx",
517         .match_table    = tcx_match,
518         .probe          = tcx_probe,
519         .remove         = __devexit_p(tcx_remove),
520 };
521
522 static int __init tcx_init(void)
523 {
524         if (fb_get_options("tcxfb", NULL))
525                 return -ENODEV;
526
527         return of_register_driver(&tcx_driver, &of_bus_type);
528 }
529
530 static void __exit tcx_exit(void)
531 {
532         of_unregister_driver(&tcx_driver);
533 }
534
535 module_init(tcx_init);
536 module_exit(tcx_exit);
537
538 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
539 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
540 MODULE_VERSION("2.0");
541 MODULE_LICENSE("GPL");