Merge branch 'intelfb-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied...
[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
21 #include <asm/io.h>
22 #include <asm/prom.h>
23 #include <asm/of_device.h>
24 #include <asm/fbio.h>
25
26 #include "sbuslib.h"
27
28 /*
29  * Local functions.
30  */
31
32 static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
33                          unsigned, struct fb_info *);
34 static int tcx_blank(int, struct fb_info *);
35
36 static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
37 static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
38 static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
39
40 /*
41  *  Frame buffer operations
42  */
43
44 static struct fb_ops tcx_ops = {
45         .owner                  = THIS_MODULE,
46         .fb_setcolreg           = tcx_setcolreg,
47         .fb_blank               = tcx_blank,
48         .fb_pan_display         = tcx_pan_display,
49         .fb_fillrect            = cfb_fillrect,
50         .fb_copyarea            = cfb_copyarea,
51         .fb_imageblit           = cfb_imageblit,
52         .fb_mmap                = tcx_mmap,
53         .fb_ioctl               = tcx_ioctl,
54 #ifdef CONFIG_COMPAT
55         .fb_compat_ioctl        = sbusfb_compat_ioctl,
56 #endif
57 };
58
59 /* THC definitions */
60 #define TCX_THC_MISC_REV_SHIFT       16
61 #define TCX_THC_MISC_REV_MASK        15
62 #define TCX_THC_MISC_VSYNC_DIS       (1 << 25)
63 #define TCX_THC_MISC_HSYNC_DIS       (1 << 24)
64 #define TCX_THC_MISC_RESET           (1 << 12)
65 #define TCX_THC_MISC_VIDEO           (1 << 10)
66 #define TCX_THC_MISC_SYNC            (1 << 9)
67 #define TCX_THC_MISC_VSYNC           (1 << 8)
68 #define TCX_THC_MISC_SYNC_ENAB       (1 << 7)
69 #define TCX_THC_MISC_CURS_RES        (1 << 6)
70 #define TCX_THC_MISC_INT_ENAB        (1 << 5)
71 #define TCX_THC_MISC_INT             (1 << 4)
72 #define TCX_THC_MISC_INIT            0x9f
73 #define TCX_THC_REV_REV_SHIFT        20
74 #define TCX_THC_REV_REV_MASK         15
75 #define TCX_THC_REV_MINREV_SHIFT     28
76 #define TCX_THC_REV_MINREV_MASK      15
77
78 /* The contents are unknown */
79 struct tcx_tec {
80         u32 tec_matrix;
81         u32 tec_clip;
82         u32 tec_vdc;
83 };
84
85 struct tcx_thc {
86         u32 thc_rev;
87         u32 thc_pad0[511];
88         u32 thc_hs;             /* hsync timing */
89         u32 thc_hsdvs;
90         u32 thc_hd;
91         u32 thc_vs;             /* vsync timing */
92         u32 thc_vd;
93         u32 thc_refresh;
94         u32 thc_misc;
95         u32 thc_pad1[56];
96         u32 thc_cursxy; /* cursor x,y position (16 bits each) */
97         u32 thc_cursmask[32];   /* cursor mask bits */
98         u32 thc_cursbits[32];   /* what to show where mask enabled */
99 };
100
101 struct bt_regs {
102         u32 addr;
103         u32 color_map;
104         u32 control;
105         u32 cursor;
106 };
107
108 #define TCX_MMAP_ENTRIES 14
109
110 struct tcx_par {
111         spinlock_t              lock;
112         struct bt_regs          __iomem *bt;
113         struct tcx_thc          __iomem *thc;
114         struct tcx_tec          __iomem *tec;
115         u32                     __iomem *cplane;
116
117         u32                     flags;
118 #define TCX_FLAG_BLANKED        0x00000001
119
120         unsigned long           physbase;
121         unsigned long           which_io;
122         unsigned long           fbsize;
123
124         struct sbus_mmap_map    mmap_map[TCX_MMAP_ENTRIES];
125         int                     lowdepth;
126 };
127
128 /* Reset control plane so that WID is 8-bit plane. */
129 static void __tcx_set_control_plane (struct tcx_par *par)
130 {
131         u32 __iomem *p, *pend;
132         
133         if (par->lowdepth)
134                 return;
135
136         p = par->cplane;
137         if (p == NULL)
138                 return;
139         for (pend = p + par->fbsize; p < pend; p++) {
140                 u32 tmp = sbus_readl(p);
141
142                 tmp &= 0xffffff;
143                 sbus_writel(tmp, p);
144         }
145 }
146                                                 
147 static void tcx_reset (struct fb_info *info)
148 {
149         struct tcx_par *par = (struct tcx_par *) info->par;
150         unsigned long flags;
151
152         spin_lock_irqsave(&par->lock, flags);
153         __tcx_set_control_plane(par);
154         spin_unlock_irqrestore(&par->lock, flags);
155 }
156
157 static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
158 {
159         tcx_reset(info);
160         return 0;
161 }
162
163 /**
164  *      tcx_setcolreg - Optional function. Sets a color register.
165  *      @regno: boolean, 0 copy local, 1 get_user() function
166  *      @red: frame buffer colormap structure
167  *      @green: The green value which can be up to 16 bits wide
168  *      @blue:  The blue value which can be up to 16 bits wide.
169  *      @transp: If supported the alpha value which can be up to 16 bits wide.
170  *      @info: frame buffer info structure
171  */
172 static int tcx_setcolreg(unsigned regno,
173                          unsigned red, unsigned green, unsigned blue,
174                          unsigned transp, struct fb_info *info)
175 {
176         struct tcx_par *par = (struct tcx_par *) info->par;
177         struct bt_regs __iomem *bt = par->bt;
178         unsigned long flags;
179
180         if (regno >= 256)
181                 return 1;
182
183         red >>= 8;
184         green >>= 8;
185         blue >>= 8;
186
187         spin_lock_irqsave(&par->lock, flags);
188
189         sbus_writel(regno << 24, &bt->addr);
190         sbus_writel(red << 24, &bt->color_map);
191         sbus_writel(green << 24, &bt->color_map);
192         sbus_writel(blue << 24, &bt->color_map);
193
194         spin_unlock_irqrestore(&par->lock, flags);
195
196         return 0;
197 }
198
199 /**
200  *      tcx_blank - Optional function.  Blanks the display.
201  *      @blank_mode: the blank mode we want.
202  *      @info: frame buffer structure that represents a single frame buffer
203  */
204 static int
205 tcx_blank(int blank, struct fb_info *info)
206 {
207         struct tcx_par *par = (struct tcx_par *) info->par;
208         struct tcx_thc __iomem *thc = par->thc;
209         unsigned long flags;
210         u32 val;
211
212         spin_lock_irqsave(&par->lock, flags);
213
214         val = sbus_readl(&thc->thc_misc);
215
216         switch (blank) {
217         case FB_BLANK_UNBLANK: /* Unblanking */
218                 val &= ~(TCX_THC_MISC_VSYNC_DIS |
219                          TCX_THC_MISC_HSYNC_DIS);
220                 val |= TCX_THC_MISC_VIDEO;
221                 par->flags &= ~TCX_FLAG_BLANKED;
222                 break;
223
224         case FB_BLANK_NORMAL: /* Normal blanking */
225                 val &= ~TCX_THC_MISC_VIDEO;
226                 par->flags |= TCX_FLAG_BLANKED;
227                 break;
228
229         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
230                 val |= TCX_THC_MISC_VSYNC_DIS;
231                 break;
232         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
233                 val |= TCX_THC_MISC_HSYNC_DIS;
234                 break;
235
236         case FB_BLANK_POWERDOWN: /* Poweroff */
237                 break;
238         };
239
240         sbus_writel(val, &thc->thc_misc);
241
242         spin_unlock_irqrestore(&par->lock, flags);
243
244         return 0;
245 }
246
247 static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
248         {
249                 .voff   = TCX_RAM8BIT,
250                 .size   = SBUS_MMAP_FBSIZE(1)
251         },
252         {
253                 .voff   = TCX_RAM24BIT,
254                 .size   = SBUS_MMAP_FBSIZE(4)
255         },
256         {
257                 .voff   = TCX_UNK3,
258                 .size   = SBUS_MMAP_FBSIZE(8)
259         },
260         {
261                 .voff   = TCX_UNK4,
262                 .size   = SBUS_MMAP_FBSIZE(8)
263         },
264         {
265                 .voff   = TCX_CONTROLPLANE,
266                 .size   = SBUS_MMAP_FBSIZE(4)
267         },
268         {
269                 .voff   = TCX_UNK6,
270                 .size   = SBUS_MMAP_FBSIZE(8)
271         },
272         {
273                 .voff   = TCX_UNK7,
274                 .size   = SBUS_MMAP_FBSIZE(8)
275         },
276         {
277                 .voff   = TCX_TEC,
278                 .size   = PAGE_SIZE
279         },
280         {
281                 .voff   = TCX_BTREGS,
282                 .size   = PAGE_SIZE
283         },
284         {
285                 .voff   = TCX_THC,
286                 .size   = PAGE_SIZE
287         },
288         {
289                 .voff   = TCX_DHC,
290                 .size   = PAGE_SIZE
291         },
292         {
293                 .voff   = TCX_ALT,
294                 .size   = PAGE_SIZE
295         },
296         {
297                 .voff   = TCX_UNK2,
298                 .size   = 0x20000
299         },
300         { .size = 0 }
301 };
302
303 static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma)
304 {
305         struct tcx_par *par = (struct tcx_par *)info->par;
306
307         return sbusfb_mmap_helper(par->mmap_map,
308                                   par->physbase, par->fbsize,
309                                   par->which_io, vma);
310 }
311
312 static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
313                      unsigned long arg)
314 {
315         struct tcx_par *par = (struct tcx_par *) info->par;
316
317         return sbusfb_ioctl_helper(cmd, arg, info,
318                                    FBTYPE_TCXCOLOR,
319                                    (par->lowdepth ? 8 : 24),
320                                    par->fbsize);
321 }
322
323 /*
324  *  Initialisation
325  */
326
327 static void
328 tcx_init_fix(struct fb_info *info, int linebytes)
329 {
330         struct tcx_par *par = (struct tcx_par *)info->par;
331         const char *tcx_name;
332
333         if (par->lowdepth)
334                 tcx_name = "TCX8";
335         else
336                 tcx_name = "TCX24";
337
338         strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
339
340         info->fix.type = FB_TYPE_PACKED_PIXELS;
341         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
342
343         info->fix.line_length = linebytes;
344
345         info->fix.accel = FB_ACCEL_SUN_TCX;
346 }
347
348 struct all_info {
349         struct fb_info info;
350         struct tcx_par par;
351 };
352
353 static void tcx_unmap_regs(struct all_info *all)
354 {
355         if (all->par.tec)
356                 of_iounmap(all->par.tec, sizeof(struct tcx_tec));
357         if (all->par.thc)
358                 of_iounmap(all->par.thc, sizeof(struct tcx_thc));
359         if (all->par.bt)
360                 of_iounmap(all->par.bt, sizeof(struct bt_regs));
361         if (all->par.cplane)
362                 of_iounmap(all->par.cplane, all->par.fbsize * sizeof(u32));
363         if (all->info.screen_base)
364                 of_iounmap(all->info.screen_base, all->par.fbsize);
365 }
366
367 static int __devinit tcx_init_one(struct of_device *op)
368 {
369         struct device_node *dp = op->node;
370         struct all_info *all;
371         int linebytes, i, err;
372
373         all = kzalloc(sizeof(*all), GFP_KERNEL);
374         if (!all)
375                 return -ENOMEM;
376
377         spin_lock_init(&all->par.lock);
378
379         all->par.lowdepth =
380                 (of_find_property(dp, "tcx-8-bit", NULL) != NULL);
381
382         sbusfb_fill_var(&all->info.var, dp->node, 8);
383         all->info.var.red.length = 8;
384         all->info.var.green.length = 8;
385         all->info.var.blue.length = 8;
386
387         linebytes = of_getintprop_default(dp, "linebytes",
388                                           all->info.var.xres);
389         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
390
391         all->par.tec = of_ioremap(&op->resource[7], 0,
392                                   sizeof(struct tcx_tec), "tcx tec");
393         all->par.thc = of_ioremap(&op->resource[9], 0,
394                                   sizeof(struct tcx_thc), "tcx thc");
395         all->par.bt = of_ioremap(&op->resource[8], 0,
396                                  sizeof(struct bt_regs), "tcx dac");
397         all->info.screen_base = of_ioremap(&op->resource[0], 0,
398                                            all->par.fbsize, "tcx ram");
399         if (!all->par.tec || !all->par.thc ||
400             !all->par.bt || !all->info.screen_base) {
401                 tcx_unmap_regs(all);
402                 kfree(all);
403                 return -ENOMEM;
404         }
405
406         memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
407         if (!all->par.lowdepth) {
408                 all->par.cplane = of_ioremap(&op->resource[4], 0,
409                                              all->par.fbsize * sizeof(u32),
410                                              "tcx cplane");
411                 if (!all->par.cplane) {
412                         tcx_unmap_regs(all);
413                         kfree(all);
414                         return -ENOMEM;
415                 }
416         } else {
417                 all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
418                 all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
419                 all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
420                 all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
421         }
422
423         all->par.physbase = 0;
424         all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
425
426         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
427                 int j;
428
429                 switch (i) {
430                 case 10:
431                         j = 12;
432                         break;
433
434                 case 11: case 12:
435                         j = i - 1;
436                         break;
437
438                 default:
439                         j = i;
440                         break;
441                 };
442                 all->par.mmap_map[i].poff = op->resource[j].start;
443         }
444
445         all->info.flags = FBINFO_DEFAULT;
446         all->info.fbops = &tcx_ops;
447         all->info.par = &all->par;
448
449         /* Initialize brooktree DAC. */
450         sbus_writel(0x04 << 24, &all->par.bt->addr);         /* color planes */
451         sbus_writel(0xff << 24, &all->par.bt->control);
452         sbus_writel(0x05 << 24, &all->par.bt->addr);
453         sbus_writel(0x00 << 24, &all->par.bt->control);
454         sbus_writel(0x06 << 24, &all->par.bt->addr);         /* overlay plane */
455         sbus_writel(0x73 << 24, &all->par.bt->control);
456         sbus_writel(0x07 << 24, &all->par.bt->addr);
457         sbus_writel(0x00 << 24, &all->par.bt->control);
458
459         tcx_reset(&all->info);
460
461         tcx_blank(FB_BLANK_UNBLANK, &all->info);
462
463         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
464                 tcx_unmap_regs(all);
465                 kfree(all);
466                 return -ENOMEM;
467         }
468
469         fb_set_cmap(&all->info.cmap, &all->info);
470         tcx_init_fix(&all->info, linebytes);
471
472         err = register_framebuffer(&all->info);
473         if (err < 0) {
474                 fb_dealloc_cmap(&all->info.cmap);
475                 tcx_unmap_regs(all);
476                 kfree(all);
477                 return err;
478         }
479
480         dev_set_drvdata(&op->dev, all);
481
482         printk("%s: TCX at %lx:%lx, %s\n",
483                dp->full_name,
484                all->par.which_io,
485                op->resource[0].start,
486                all->par.lowdepth ? "8-bit only" : "24-bit depth");
487
488         return 0;
489 }
490
491 static int __devinit tcx_probe(struct of_device *dev, const struct of_device_id *match)
492 {
493         struct of_device *op = to_of_device(&dev->dev);
494
495         return tcx_init_one(op);
496 }
497
498 static int __devexit tcx_remove(struct of_device *dev)
499 {
500         struct all_info *all = dev_get_drvdata(&dev->dev);
501
502         unregister_framebuffer(&all->info);
503         fb_dealloc_cmap(&all->info.cmap);
504
505         tcx_unmap_regs(all);
506
507         kfree(all);
508
509         dev_set_drvdata(&dev->dev, NULL);
510
511         return 0;
512 }
513
514 static struct of_device_id tcx_match[] = {
515         {
516                 .name = "SUNW,tcx",
517         },
518         {},
519 };
520 MODULE_DEVICE_TABLE(of, tcx_match);
521
522 static struct of_platform_driver tcx_driver = {
523         .name           = "tcx",
524         .match_table    = tcx_match,
525         .probe          = tcx_probe,
526         .remove         = __devexit_p(tcx_remove),
527 };
528
529 int __init tcx_init(void)
530 {
531         if (fb_get_options("tcxfb", NULL))
532                 return -ENODEV;
533
534         return of_register_driver(&tcx_driver, &of_bus_type);
535 }
536
537 void __exit tcx_exit(void)
538 {
539         of_unregister_driver(&tcx_driver);
540 }
541
542 module_init(tcx_init);
543 module_exit(tcx_exit);
544
545 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
546 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
547 MODULE_VERSION("2.0");
548 MODULE_LICENSE("GPL");