Pull context-bitmap into release branch
[linux-2.6] / drivers / video / tcx.c
1 /* tcx.c: TCX frame buffer driver
2  *
3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
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/sbus.h>
23 #include <asm/oplib.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 file *, struct vm_area_struct *);
37 static int tcx_ioctl(struct inode *, struct file *, unsigned int,
38                      unsigned long, struct fb_info *);
39 static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
40
41 /*
42  *  Frame buffer operations
43  */
44
45 static struct fb_ops tcx_ops = {
46         .owner                  = THIS_MODULE,
47         .fb_setcolreg           = tcx_setcolreg,
48         .fb_blank               = tcx_blank,
49         .fb_pan_display         = tcx_pan_display,
50         .fb_fillrect            = cfb_fillrect,
51         .fb_copyarea            = cfb_copyarea,
52         .fb_imageblit           = cfb_imageblit,
53         .fb_mmap                = tcx_mmap,
54         .fb_ioctl               = tcx_ioctl,
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         volatile u32 tec_matrix;
79         volatile u32 tec_clip;
80         volatile u32 tec_vdc;
81 };
82
83 struct tcx_thc {
84         volatile u32 thc_rev;
85         u32 thc_pad0[511];
86         volatile u32 thc_hs;            /* hsync timing */
87         volatile u32 thc_hsdvs;
88         volatile u32 thc_hd;
89         volatile u32 thc_vs;            /* vsync timing */
90         volatile u32 thc_vd;
91         volatile u32 thc_refresh;
92         volatile u32 thc_misc;
93         u32 thc_pad1[56];
94         volatile u32 thc_cursxy;        /* cursor x,y position (16 bits each) */
95         volatile u32 thc_cursmask[32];  /* cursor mask bits */
96         volatile u32 thc_cursbits[32];  /* what to show where mask enabled */
97 };
98
99 struct bt_regs {
100         volatile u32 addr;
101         volatile u32 color_map;
102         volatile u32 control;
103         volatile 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         volatile u32            __iomem *cplane;
114
115         u32                     flags;
116 #define TCX_FLAG_BLANKED        0x00000001
117
118         unsigned long           physbase;
119         unsigned long           fbsize;
120
121         struct sbus_mmap_map    mmap_map[TCX_MMAP_ENTRIES];
122         int                     lowdepth;
123
124         struct sbus_dev         *sdev;
125         struct list_head        list;
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         volatile 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 file *file, 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->sdev->reg_addrs[0].which_io,
310                                   vma);
311 }
312
313 static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
314                      unsigned long arg, struct fb_info *info)
315 {
316         struct tcx_par *par = (struct tcx_par *) info->par;
317
318         return sbusfb_ioctl_helper(cmd, arg, info,
319                                    FBTYPE_TCXCOLOR,
320                                    (par->lowdepth ? 8 : 24),
321                                    par->fbsize);
322 }
323
324 /*
325  *  Initialisation
326  */
327
328 static void
329 tcx_init_fix(struct fb_info *info, int linebytes)
330 {
331         struct tcx_par *par = (struct tcx_par *)info->par;
332         const char *tcx_name;
333
334         if (par->lowdepth)
335                 tcx_name = "TCX8";
336         else
337                 tcx_name = "TCX24";
338
339         strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
340
341         info->fix.type = FB_TYPE_PACKED_PIXELS;
342         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
343
344         info->fix.line_length = linebytes;
345
346         info->fix.accel = FB_ACCEL_SUN_TCX;
347 }
348
349 struct all_info {
350         struct fb_info info;
351         struct tcx_par par;
352         struct list_head list;
353 };
354 static LIST_HEAD(tcx_list);
355
356 static void tcx_init_one(struct sbus_dev *sdev)
357 {
358         struct all_info *all;
359         int linebytes, i;
360
361         all = kmalloc(sizeof(*all), GFP_KERNEL);
362         if (!all) {
363                 printk(KERN_ERR "tcx: Cannot allocate memory.\n");
364                 return;
365         }
366         memset(all, 0, sizeof(*all));
367
368         INIT_LIST_HEAD(&all->list);
369
370         spin_lock_init(&all->par.lock);
371         all->par.sdev = sdev;
372
373         all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit");
374
375         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
376         all->info.var.red.length = 8;
377         all->info.var.green.length = 8;
378         all->info.var.blue.length = 8;
379
380         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
381                                        all->info.var.xres);
382         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
383
384         all->par.tec = sbus_ioremap(&sdev->resource[7], 0,
385                              sizeof(struct tcx_tec), "tcx tec");
386         all->par.thc = sbus_ioremap(&sdev->resource[9], 0,
387                              sizeof(struct tcx_thc), "tcx thc");
388         all->par.bt = sbus_ioremap(&sdev->resource[8], 0,
389                              sizeof(struct bt_regs), "tcx dac");
390         memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
391         if (!all->par.lowdepth) {
392                 all->par.cplane = sbus_ioremap(&sdev->resource[4], 0,
393                                      all->par.fbsize * sizeof(u32), "tcx cplane");
394         } else {
395                 all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
396                 all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
397                 all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
398                 all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
399         }
400
401         all->par.physbase = 0;
402         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
403                 int j;
404
405                 switch (i) {
406                 case 10:
407                         j = 12;
408                         break;
409
410                 case 11: case 12:
411                         j = i - 1;
412                         break;
413
414                 default:
415                         j = i;
416                         break;
417                 };
418                 all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr;
419         }
420
421         all->info.flags = FBINFO_DEFAULT;
422         all->info.fbops = &tcx_ops;
423 #ifdef CONFIG_SPARC32
424         all->info.screen_base = (char __iomem *)
425                 prom_getintdefault(sdev->prom_node, "address", 0);
426 #endif
427         if (!all->info.screen_base)
428                 all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0,
429                                      all->par.fbsize, "tcx ram");
430         all->info.par = &all->par;
431
432         /* Initialize brooktree DAC. */
433         sbus_writel(0x04 << 24, &all->par.bt->addr);         /* color planes */
434         sbus_writel(0xff << 24, &all->par.bt->control);
435         sbus_writel(0x05 << 24, &all->par.bt->addr);
436         sbus_writel(0x00 << 24, &all->par.bt->control);
437         sbus_writel(0x06 << 24, &all->par.bt->addr);         /* overlay plane */
438         sbus_writel(0x73 << 24, &all->par.bt->control);
439         sbus_writel(0x07 << 24, &all->par.bt->addr);
440         sbus_writel(0x00 << 24, &all->par.bt->control);
441
442         tcx_reset(&all->info);
443
444         tcx_blank(0, &all->info);
445
446         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
447                 printk(KERN_ERR "tcx: Could not allocate color map.\n");
448                 kfree(all);
449                 return;
450         }
451
452         fb_set_cmap(&all->info.cmap, &all->info);
453         tcx_init_fix(&all->info, linebytes);
454
455         if (register_framebuffer(&all->info) < 0) {
456                 printk(KERN_ERR "tcx: Could not register framebuffer.\n");
457                 fb_dealloc_cmap(&all->info.cmap);
458                 kfree(all);
459                 return;
460         }
461
462         list_add(&all->list, &tcx_list);
463
464         printk("tcx: %s at %lx:%lx, %s\n",
465                sdev->prom_name,
466                (long) sdev->reg_addrs[0].which_io,
467                (long) sdev->reg_addrs[0].phys_addr,
468                all->par.lowdepth ? "8-bit only" : "24-bit depth");
469 }
470
471 int __init tcx_init(void)
472 {
473         struct sbus_bus *sbus;
474         struct sbus_dev *sdev;
475
476         if (fb_get_options("tcxfb", NULL))
477                 return -ENODEV;
478
479         for_all_sbusdev(sdev, sbus) {
480                 if (!strcmp(sdev->prom_name, "SUNW,tcx"))
481                         tcx_init_one(sdev);
482         }
483
484         return 0;
485 }
486
487 void __exit tcx_exit(void)
488 {
489         struct list_head *pos, *tmp;
490
491         list_for_each_safe(pos, tmp, &tcx_list) {
492                 struct all_info *all = list_entry(pos, typeof(*all), list);
493
494                 unregister_framebuffer(&all->info);
495                 fb_dealloc_cmap(&all->info.cmap);
496                 kfree(all);
497         }
498 }
499
500 int __init
501 tcx_setup(char *arg)
502 {
503         /* No cmdline options yet... */
504         return 0;
505 }
506
507 module_init(tcx_init);
508
509 #ifdef MODULE
510 module_exit(tcx_exit);
511 #endif
512
513 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
514 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
515 MODULE_LICENSE("GPL");