Merge git://oss.sgi.com:8090/oss/git/xfs-2.6
[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 #ifdef CONFIG_COMPAT
56         .fb_compat_ioctl        = sbusfb_compat_ioctl,
57 #endif
58 };
59
60 /* THC definitions */
61 #define TCX_THC_MISC_REV_SHIFT       16
62 #define TCX_THC_MISC_REV_MASK        15
63 #define TCX_THC_MISC_VSYNC_DIS       (1 << 25)
64 #define TCX_THC_MISC_HSYNC_DIS       (1 << 24)
65 #define TCX_THC_MISC_RESET           (1 << 12)
66 #define TCX_THC_MISC_VIDEO           (1 << 10)
67 #define TCX_THC_MISC_SYNC            (1 << 9)
68 #define TCX_THC_MISC_VSYNC           (1 << 8)
69 #define TCX_THC_MISC_SYNC_ENAB       (1 << 7)
70 #define TCX_THC_MISC_CURS_RES        (1 << 6)
71 #define TCX_THC_MISC_INT_ENAB        (1 << 5)
72 #define TCX_THC_MISC_INT             (1 << 4)
73 #define TCX_THC_MISC_INIT            0x9f
74 #define TCX_THC_REV_REV_SHIFT        20
75 #define TCX_THC_REV_REV_MASK         15
76 #define TCX_THC_REV_MINREV_SHIFT     28
77 #define TCX_THC_REV_MINREV_MASK      15
78
79 /* The contents are unknown */
80 struct tcx_tec {
81         volatile u32 tec_matrix;
82         volatile u32 tec_clip;
83         volatile u32 tec_vdc;
84 };
85
86 struct tcx_thc {
87         volatile u32 thc_rev;
88         u32 thc_pad0[511];
89         volatile u32 thc_hs;            /* hsync timing */
90         volatile u32 thc_hsdvs;
91         volatile u32 thc_hd;
92         volatile u32 thc_vs;            /* vsync timing */
93         volatile u32 thc_vd;
94         volatile u32 thc_refresh;
95         volatile u32 thc_misc;
96         u32 thc_pad1[56];
97         volatile u32 thc_cursxy;        /* cursor x,y position (16 bits each) */
98         volatile u32 thc_cursmask[32];  /* cursor mask bits */
99         volatile u32 thc_cursbits[32];  /* what to show where mask enabled */
100 };
101
102 struct bt_regs {
103         volatile u32 addr;
104         volatile u32 color_map;
105         volatile u32 control;
106         volatile u32 cursor;
107 };
108
109 #define TCX_MMAP_ENTRIES 14
110
111 struct tcx_par {
112         spinlock_t              lock;
113         struct bt_regs          __iomem *bt;
114         struct tcx_thc          __iomem *thc;
115         struct tcx_tec          __iomem *tec;
116         volatile u32            __iomem *cplane;
117
118         u32                     flags;
119 #define TCX_FLAG_BLANKED        0x00000001
120
121         unsigned long           physbase;
122         unsigned long           fbsize;
123
124         struct sbus_mmap_map    mmap_map[TCX_MMAP_ENTRIES];
125         int                     lowdepth;
126
127         struct sbus_dev         *sdev;
128         struct list_head        list;
129 };
130
131 /* Reset control plane so that WID is 8-bit plane. */
132 static void __tcx_set_control_plane (struct tcx_par *par)
133 {
134         volatile u32 __iomem *p, *pend;
135         
136         if (par->lowdepth)
137                 return;
138
139         p = par->cplane;
140         if (p == NULL)
141                 return;
142         for (pend = p + par->fbsize; p < pend; p++) {
143                 u32 tmp = sbus_readl(p);
144
145                 tmp &= 0xffffff;
146                 sbus_writel(tmp, p);
147         }
148 }
149                                                 
150 static void tcx_reset (struct fb_info *info)
151 {
152         struct tcx_par *par = (struct tcx_par *) info->par;
153         unsigned long flags;
154
155         spin_lock_irqsave(&par->lock, flags);
156         __tcx_set_control_plane(par);
157         spin_unlock_irqrestore(&par->lock, flags);
158 }
159
160 static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
161 {
162         tcx_reset(info);
163         return 0;
164 }
165
166 /**
167  *      tcx_setcolreg - Optional function. Sets a color register.
168  *      @regno: boolean, 0 copy local, 1 get_user() function
169  *      @red: frame buffer colormap structure
170  *      @green: The green value which can be up to 16 bits wide
171  *      @blue:  The blue value which can be up to 16 bits wide.
172  *      @transp: If supported the alpha value which can be up to 16 bits wide.
173  *      @info: frame buffer info structure
174  */
175 static int tcx_setcolreg(unsigned regno,
176                          unsigned red, unsigned green, unsigned blue,
177                          unsigned transp, struct fb_info *info)
178 {
179         struct tcx_par *par = (struct tcx_par *) info->par;
180         struct bt_regs __iomem *bt = par->bt;
181         unsigned long flags;
182
183         if (regno >= 256)
184                 return 1;
185
186         red >>= 8;
187         green >>= 8;
188         blue >>= 8;
189
190         spin_lock_irqsave(&par->lock, flags);
191
192         sbus_writel(regno << 24, &bt->addr);
193         sbus_writel(red << 24, &bt->color_map);
194         sbus_writel(green << 24, &bt->color_map);
195         sbus_writel(blue << 24, &bt->color_map);
196
197         spin_unlock_irqrestore(&par->lock, flags);
198
199         return 0;
200 }
201
202 /**
203  *      tcx_blank - Optional function.  Blanks the display.
204  *      @blank_mode: the blank mode we want.
205  *      @info: frame buffer structure that represents a single frame buffer
206  */
207 static int
208 tcx_blank(int blank, struct fb_info *info)
209 {
210         struct tcx_par *par = (struct tcx_par *) info->par;
211         struct tcx_thc __iomem *thc = par->thc;
212         unsigned long flags;
213         u32 val;
214
215         spin_lock_irqsave(&par->lock, flags);
216
217         val = sbus_readl(&thc->thc_misc);
218
219         switch (blank) {
220         case FB_BLANK_UNBLANK: /* Unblanking */
221                 val &= ~(TCX_THC_MISC_VSYNC_DIS |
222                          TCX_THC_MISC_HSYNC_DIS);
223                 val |= TCX_THC_MISC_VIDEO;
224                 par->flags &= ~TCX_FLAG_BLANKED;
225                 break;
226
227         case FB_BLANK_NORMAL: /* Normal blanking */
228                 val &= ~TCX_THC_MISC_VIDEO;
229                 par->flags |= TCX_FLAG_BLANKED;
230                 break;
231
232         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
233                 val |= TCX_THC_MISC_VSYNC_DIS;
234                 break;
235         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
236                 val |= TCX_THC_MISC_HSYNC_DIS;
237                 break;
238
239         case FB_BLANK_POWERDOWN: /* Poweroff */
240                 break;
241         };
242
243         sbus_writel(val, &thc->thc_misc);
244
245         spin_unlock_irqrestore(&par->lock, flags);
246
247         return 0;
248 }
249
250 static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
251         {
252                 .voff   = TCX_RAM8BIT,
253                 .size   = SBUS_MMAP_FBSIZE(1)
254         },
255         {
256                 .voff   = TCX_RAM24BIT,
257                 .size   = SBUS_MMAP_FBSIZE(4)
258         },
259         {
260                 .voff   = TCX_UNK3,
261                 .size   = SBUS_MMAP_FBSIZE(8)
262         },
263         {
264                 .voff   = TCX_UNK4,
265                 .size   = SBUS_MMAP_FBSIZE(8)
266         },
267         {
268                 .voff   = TCX_CONTROLPLANE,
269                 .size   = SBUS_MMAP_FBSIZE(4)
270         },
271         {
272                 .voff   = TCX_UNK6,
273                 .size   = SBUS_MMAP_FBSIZE(8)
274         },
275         {
276                 .voff   = TCX_UNK7,
277                 .size   = SBUS_MMAP_FBSIZE(8)
278         },
279         {
280                 .voff   = TCX_TEC,
281                 .size   = PAGE_SIZE
282         },
283         {
284                 .voff   = TCX_BTREGS,
285                 .size   = PAGE_SIZE
286         },
287         {
288                 .voff   = TCX_THC,
289                 .size   = PAGE_SIZE
290         },
291         {
292                 .voff   = TCX_DHC,
293                 .size   = PAGE_SIZE
294         },
295         {
296                 .voff   = TCX_ALT,
297                 .size   = PAGE_SIZE
298         },
299         {
300                 .voff   = TCX_UNK2,
301                 .size   = 0x20000
302         },
303         { .size = 0 }
304 };
305
306 static int tcx_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
307 {
308         struct tcx_par *par = (struct tcx_par *)info->par;
309
310         return sbusfb_mmap_helper(par->mmap_map,
311                                   par->physbase, par->fbsize,
312                                   par->sdev->reg_addrs[0].which_io,
313                                   vma);
314 }
315
316 static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
317                      unsigned long arg, struct fb_info *info)
318 {
319         struct tcx_par *par = (struct tcx_par *) info->par;
320
321         return sbusfb_ioctl_helper(cmd, arg, info,
322                                    FBTYPE_TCXCOLOR,
323                                    (par->lowdepth ? 8 : 24),
324                                    par->fbsize);
325 }
326
327 /*
328  *  Initialisation
329  */
330
331 static void
332 tcx_init_fix(struct fb_info *info, int linebytes)
333 {
334         struct tcx_par *par = (struct tcx_par *)info->par;
335         const char *tcx_name;
336
337         if (par->lowdepth)
338                 tcx_name = "TCX8";
339         else
340                 tcx_name = "TCX24";
341
342         strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
343
344         info->fix.type = FB_TYPE_PACKED_PIXELS;
345         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
346
347         info->fix.line_length = linebytes;
348
349         info->fix.accel = FB_ACCEL_SUN_TCX;
350 }
351
352 struct all_info {
353         struct fb_info info;
354         struct tcx_par par;
355         struct list_head list;
356 };
357 static LIST_HEAD(tcx_list);
358
359 static void tcx_init_one(struct sbus_dev *sdev)
360 {
361         struct all_info *all;
362         int linebytes, i;
363
364         all = kmalloc(sizeof(*all), GFP_KERNEL);
365         if (!all) {
366                 printk(KERN_ERR "tcx: Cannot allocate memory.\n");
367                 return;
368         }
369         memset(all, 0, sizeof(*all));
370
371         INIT_LIST_HEAD(&all->list);
372
373         spin_lock_init(&all->par.lock);
374         all->par.sdev = sdev;
375
376         all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit");
377
378         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
379         all->info.var.red.length = 8;
380         all->info.var.green.length = 8;
381         all->info.var.blue.length = 8;
382
383         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
384                                        all->info.var.xres);
385         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
386
387         all->par.tec = sbus_ioremap(&sdev->resource[7], 0,
388                              sizeof(struct tcx_tec), "tcx tec");
389         all->par.thc = sbus_ioremap(&sdev->resource[9], 0,
390                              sizeof(struct tcx_thc), "tcx thc");
391         all->par.bt = sbus_ioremap(&sdev->resource[8], 0,
392                              sizeof(struct bt_regs), "tcx dac");
393         memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
394         if (!all->par.lowdepth) {
395                 all->par.cplane = sbus_ioremap(&sdev->resource[4], 0,
396                                      all->par.fbsize * sizeof(u32), "tcx cplane");
397         } else {
398                 all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
399                 all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
400                 all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
401                 all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
402         }
403
404         all->par.physbase = 0;
405         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
406                 int j;
407
408                 switch (i) {
409                 case 10:
410                         j = 12;
411                         break;
412
413                 case 11: case 12:
414                         j = i - 1;
415                         break;
416
417                 default:
418                         j = i;
419                         break;
420                 };
421                 all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr;
422         }
423
424         all->info.flags = FBINFO_DEFAULT;
425         all->info.fbops = &tcx_ops;
426 #ifdef CONFIG_SPARC32
427         all->info.screen_base = (char __iomem *)
428                 prom_getintdefault(sdev->prom_node, "address", 0);
429 #endif
430         if (!all->info.screen_base)
431                 all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0,
432                                      all->par.fbsize, "tcx ram");
433         all->info.par = &all->par;
434
435         /* Initialize brooktree DAC. */
436         sbus_writel(0x04 << 24, &all->par.bt->addr);         /* color planes */
437         sbus_writel(0xff << 24, &all->par.bt->control);
438         sbus_writel(0x05 << 24, &all->par.bt->addr);
439         sbus_writel(0x00 << 24, &all->par.bt->control);
440         sbus_writel(0x06 << 24, &all->par.bt->addr);         /* overlay plane */
441         sbus_writel(0x73 << 24, &all->par.bt->control);
442         sbus_writel(0x07 << 24, &all->par.bt->addr);
443         sbus_writel(0x00 << 24, &all->par.bt->control);
444
445         tcx_reset(&all->info);
446
447         tcx_blank(0, &all->info);
448
449         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
450                 printk(KERN_ERR "tcx: Could not allocate color map.\n");
451                 kfree(all);
452                 return;
453         }
454
455         fb_set_cmap(&all->info.cmap, &all->info);
456         tcx_init_fix(&all->info, linebytes);
457
458         if (register_framebuffer(&all->info) < 0) {
459                 printk(KERN_ERR "tcx: Could not register framebuffer.\n");
460                 fb_dealloc_cmap(&all->info.cmap);
461                 kfree(all);
462                 return;
463         }
464
465         list_add(&all->list, &tcx_list);
466
467         printk("tcx: %s at %lx:%lx, %s\n",
468                sdev->prom_name,
469                (long) sdev->reg_addrs[0].which_io,
470                (long) sdev->reg_addrs[0].phys_addr,
471                all->par.lowdepth ? "8-bit only" : "24-bit depth");
472 }
473
474 int __init tcx_init(void)
475 {
476         struct sbus_bus *sbus;
477         struct sbus_dev *sdev;
478
479         if (fb_get_options("tcxfb", NULL))
480                 return -ENODEV;
481
482         for_all_sbusdev(sdev, sbus) {
483                 if (!strcmp(sdev->prom_name, "SUNW,tcx"))
484                         tcx_init_one(sdev);
485         }
486
487         return 0;
488 }
489
490 void __exit tcx_exit(void)
491 {
492         struct list_head *pos, *tmp;
493
494         list_for_each_safe(pos, tmp, &tcx_list) {
495                 struct all_info *all = list_entry(pos, typeof(*all), list);
496
497                 unregister_framebuffer(&all->info);
498                 fb_dealloc_cmap(&all->info.cmap);
499                 kfree(all);
500         }
501 }
502
503 int __init
504 tcx_setup(char *arg)
505 {
506         /* No cmdline options yet... */
507         return 0;
508 }
509
510 module_init(tcx_init);
511
512 #ifdef MODULE
513 module_exit(tcx_exit);
514 #endif
515
516 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
517 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
518 MODULE_LICENSE("GPL");