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