ata_piix: SATA 2port controller port map fix
[linux-2.6.git] / 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 static void tcx_unmap_regs(struct of_device *op, struct fb_info *info,
349                            struct tcx_par *par)
350 {
351         if (par->tec)
352                 of_iounmap(&op->resource[7],
353                            par->tec, sizeof(struct tcx_tec));
354         if (par->thc)
355                 of_iounmap(&op->resource[9],
356                            par->thc, sizeof(struct tcx_thc));
357         if (par->bt)
358                 of_iounmap(&op->resource[8],
359                            par->bt, sizeof(struct bt_regs));
360         if (par->cplane)
361                 of_iounmap(&op->resource[4],
362                            par->cplane, par->fbsize * sizeof(u32));
363         if (info->screen_base)
364                 of_iounmap(&op->resource[0],
365                            info->screen_base, par->fbsize);
366 }
367
368 static int __devinit tcx_init_one(struct of_device *op)
369 {
370         struct device_node *dp = op->node;
371         struct fb_info *info;
372         struct tcx_par *par;
373         int linebytes, i, err;
374
375         info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
376
377         err = -ENOMEM;
378         if (!info)
379                 goto out_err;
380         par = info->par;
381
382         spin_lock_init(&par->lock);
383
384         par->lowdepth =
385                 (of_find_property(dp, "tcx-8-bit", NULL) != NULL);
386
387         sbusfb_fill_var(&info->var, dp->node, 8);
388         info->var.red.length = 8;
389         info->var.green.length = 8;
390         info->var.blue.length = 8;
391
392         linebytes = of_getintprop_default(dp, "linebytes",
393                                           info->var.xres);
394         par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
395
396         par->tec = of_ioremap(&op->resource[7], 0,
397                                   sizeof(struct tcx_tec), "tcx tec");
398         par->thc = of_ioremap(&op->resource[9], 0,
399                                   sizeof(struct tcx_thc), "tcx thc");
400         par->bt = of_ioremap(&op->resource[8], 0,
401                                  sizeof(struct bt_regs), "tcx dac");
402         info->screen_base = of_ioremap(&op->resource[0], 0,
403                                            par->fbsize, "tcx ram");
404         if (!par->tec || !par->thc ||
405             !par->bt || !info->screen_base)
406                 goto out_unmap_regs;
407
408         memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
409         if (!par->lowdepth) {
410                 par->cplane = of_ioremap(&op->resource[4], 0,
411                                              par->fbsize * sizeof(u32),
412                                              "tcx cplane");
413                 if (!par->cplane)
414                         goto out_unmap_regs;
415         } else {
416                 par->mmap_map[1].size = SBUS_MMAP_EMPTY;
417                 par->mmap_map[4].size = SBUS_MMAP_EMPTY;
418                 par->mmap_map[5].size = SBUS_MMAP_EMPTY;
419                 par->mmap_map[6].size = SBUS_MMAP_EMPTY;
420         }
421
422         par->physbase = 0;
423         par->which_io = op->resource[0].flags & IORESOURCE_BITS;
424
425         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
426                 int j;
427
428                 switch (i) {
429                 case 10:
430                         j = 12;
431                         break;
432
433                 case 11: case 12:
434                         j = i - 1;
435                         break;
436
437                 default:
438                         j = i;
439                         break;
440                 };
441                 par->mmap_map[i].poff = op->resource[j].start;
442         }
443
444         info->flags = FBINFO_DEFAULT;
445         info->fbops = &tcx_ops;
446
447         /* Initialize brooktree DAC. */
448         sbus_writel(0x04 << 24, &par->bt->addr);         /* color planes */
449         sbus_writel(0xff << 24, &par->bt->control);
450         sbus_writel(0x05 << 24, &par->bt->addr);
451         sbus_writel(0x00 << 24, &par->bt->control);
452         sbus_writel(0x06 << 24, &par->bt->addr);         /* overlay plane */
453         sbus_writel(0x73 << 24, &par->bt->control);
454         sbus_writel(0x07 << 24, &par->bt->addr);
455         sbus_writel(0x00 << 24, &par->bt->control);
456
457         tcx_reset(info);
458
459         tcx_blank(FB_BLANK_UNBLANK, info);
460
461         if (fb_alloc_cmap(&info->cmap, 256, 0))
462                 goto out_unmap_regs;
463
464         fb_set_cmap(&info->cmap, info);
465         tcx_init_fix(info, linebytes);
466
467         err = register_framebuffer(info);
468         if (err < 0)
469                 goto out_dealloc_cmap;
470
471         dev_set_drvdata(&op->dev, info);
472
473         printk("%s: TCX at %lx:%lx, %s\n",
474                dp->full_name,
475                par->which_io,
476                op->resource[0].start,
477                par->lowdepth ? "8-bit only" : "24-bit depth");
478
479         return 0;
480
481 out_dealloc_cmap:
482         fb_dealloc_cmap(&info->cmap);
483
484 out_unmap_regs:
485         tcx_unmap_regs(op, info, par);
486
487 out_err:
488         return err;
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 *op)
499 {
500         struct fb_info *info = dev_get_drvdata(&op->dev);
501         struct tcx_par *par = info->par;
502
503         unregister_framebuffer(info);
504         fb_dealloc_cmap(&info->cmap);
505
506         tcx_unmap_regs(op, info, par);
507
508         framebuffer_release(info);
509
510         dev_set_drvdata(&op->dev, NULL);
511
512         return 0;
513 }
514
515 static struct of_device_id tcx_match[] = {
516         {
517                 .name = "SUNW,tcx",
518         },
519         {},
520 };
521 MODULE_DEVICE_TABLE(of, tcx_match);
522
523 static struct of_platform_driver tcx_driver = {
524         .name           = "tcx",
525         .match_table    = tcx_match,
526         .probe          = tcx_probe,
527         .remove         = __devexit_p(tcx_remove),
528 };
529
530 int __init tcx_init(void)
531 {
532         if (fb_get_options("tcxfb", NULL))
533                 return -ENODEV;
534
535         return of_register_driver(&tcx_driver, &of_bus_type);
536 }
537
538 void __exit tcx_exit(void)
539 {
540         of_unregister_driver(&tcx_driver);
541 }
542
543 module_init(tcx_init);
544 module_exit(tcx_exit);
545
546 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
547 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
548 MODULE_VERSION("2.0");
549 MODULE_LICENSE("GPL");