Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[linux-2.6] / drivers / video / offb.c
1 /*
2  *  linux/drivers/video/offb.c -- Open Firmware based frame buffer device
3  *
4  *      Copyright (C) 1997 Geert Uytterhoeven
5  *
6  *  This driver is partly based on the PowerMac console driver:
7  *
8  *      Copyright (C) 1996 Paul Mackerras
9  *
10  *  This file is subject to the terms and conditions of the GNU General Public
11  *  License. See the file COPYING in the main directory of this archive for
12  *  more details.
13  */
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/string.h>
19 #include <linux/mm.h>
20 #include <linux/tty.h>
21 #include <linux/slab.h>
22 #include <linux/vmalloc.h>
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/fb.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/pci.h>
29 #include <asm/io.h>
30 #include <asm/prom.h>
31
32 #ifdef CONFIG_PPC64
33 #include <asm/pci-bridge.h>
34 #endif
35
36 #ifdef CONFIG_PPC32
37 #include <asm/bootx.h>
38 #endif
39
40 #include "macmodes.h"
41
42 /* Supported palette hacks */
43 enum {
44         cmap_unknown,
45         cmap_m64,               /* ATI Mach64 */
46         cmap_r128,              /* ATI Rage128 */
47         cmap_M3A,               /* ATI Rage Mobility M3 Head A */
48         cmap_M3B,               /* ATI Rage Mobility M3 Head B */
49         cmap_radeon,            /* ATI Radeon */
50         cmap_gxt2000,           /* IBM GXT2000 */
51 };
52
53 struct offb_par {
54         volatile void __iomem *cmap_adr;
55         volatile void __iomem *cmap_data;
56         int cmap_type;
57         int blanked;
58 };
59
60 struct offb_par default_par;
61
62     /*
63      *  Interface used by the world
64      */
65
66 int offb_init(void);
67
68 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
69                           u_int transp, struct fb_info *info);
70 static int offb_blank(int blank, struct fb_info *info);
71
72 #ifdef CONFIG_PPC32
73 extern boot_infos_t *boot_infos;
74 #endif
75
76 static void offb_init_nodriver(struct device_node *);
77 static void offb_init_fb(const char *name, const char *full_name,
78                          int width, int height, int depth, int pitch,
79                          unsigned long address, struct device_node *dp);
80
81 static struct fb_ops offb_ops = {
82         .owner          = THIS_MODULE,
83         .fb_setcolreg   = offb_setcolreg,
84         .fb_blank       = offb_blank,
85         .fb_fillrect    = cfb_fillrect,
86         .fb_copyarea    = cfb_copyarea,
87         .fb_imageblit   = cfb_imageblit,
88 };
89
90     /*
91      *  Set a single color register. The values supplied are already
92      *  rounded down to the hardware's capabilities (according to the
93      *  entries in the var structure). Return != 0 for invalid regno.
94      */
95
96 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
97                           u_int transp, struct fb_info *info)
98 {
99         struct offb_par *par = (struct offb_par *) info->par;
100
101         if (!par->cmap_adr || regno > 255)
102                 return 1;
103
104         red >>= 8;
105         green >>= 8;
106         blue >>= 8;
107
108         switch (par->cmap_type) {
109         case cmap_m64:
110                 writeb(regno, par->cmap_adr);
111                 writeb(red, par->cmap_data);
112                 writeb(green, par->cmap_data);
113                 writeb(blue, par->cmap_data);
114                 break;
115         case cmap_M3A:
116                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
117                 out_le32(par->cmap_adr + 0x58,
118                          in_le32(par->cmap_adr + 0x58) & ~0x20);
119         case cmap_r128:
120                 /* Set palette index & data */
121                 out_8(par->cmap_adr + 0xb0, regno);
122                 out_le32(par->cmap_adr + 0xb4,
123                          (red << 16 | green << 8 | blue));
124                 break;
125         case cmap_M3B:
126                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
127                 out_le32(par->cmap_adr + 0x58,
128                          in_le32(par->cmap_adr + 0x58) | 0x20);
129                 /* Set palette index & data */
130                 out_8(par->cmap_adr + 0xb0, regno);
131                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
132                 break;
133         case cmap_radeon:
134                 /* Set palette index & data (could be smarter) */
135                 out_8(par->cmap_adr + 0xb0, regno);
136                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
137                 break;
138         case cmap_gxt2000:
139                 out_le32((unsigned __iomem *) par->cmap_adr + regno,
140                          (red << 16 | green << 8 | blue));
141                 break;
142         }
143
144         if (regno < 16)
145                 switch (info->var.bits_per_pixel) {
146                 case 16:
147                         ((u16 *) (info->pseudo_palette))[regno] =
148                             (regno << 10) | (regno << 5) | regno;
149                         break;
150                 case 32:
151                         {
152                                 int i = (regno << 8) | regno;
153                                 ((u32 *) (info->pseudo_palette))[regno] =
154                                     (i << 16) | i;
155                                 break;
156                         }
157                 }
158         return 0;
159 }
160
161     /*
162      *  Blank the display.
163      */
164
165 static int offb_blank(int blank, struct fb_info *info)
166 {
167         struct offb_par *par = (struct offb_par *) info->par;
168         int i, j;
169
170         if (!par->cmap_adr)
171                 return 0;
172
173         if (!par->blanked)
174                 if (!blank)
175                         return 0;
176
177         par->blanked = blank;
178
179         if (blank)
180                 for (i = 0; i < 256; i++) {
181                         switch (par->cmap_type) {
182                         case cmap_m64:
183                                 writeb(i, par->cmap_adr);
184                                 for (j = 0; j < 3; j++)
185                                         writeb(0, par->cmap_data);
186                                 break;
187                         case cmap_M3A:
188                                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
189                                 out_le32(par->cmap_adr + 0x58,
190                                          in_le32(par->cmap_adr + 0x58) & ~0x20);
191                         case cmap_r128:
192                                 /* Set palette index & data */
193                                 out_8(par->cmap_adr + 0xb0, i);
194                                 out_le32(par->cmap_adr + 0xb4, 0);
195                                 break;
196                         case cmap_M3B:
197                                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
198                                 out_le32(par->cmap_adr + 0x58,
199                                          in_le32(par->cmap_adr + 0x58) | 0x20);
200                                 /* Set palette index & data */
201                                 out_8(par->cmap_adr + 0xb0, i);
202                                 out_le32(par->cmap_adr + 0xb4, 0);
203                                 break;
204                         case cmap_radeon:
205                                 out_8(par->cmap_adr + 0xb0, i);
206                                 out_le32(par->cmap_adr + 0xb4, 0);
207                                 break;
208                         case cmap_gxt2000:
209                                 out_le32((unsigned __iomem *) par->cmap_adr + i,
210                                          0);
211                                 break;
212                         }
213         } else
214                 fb_set_cmap(&info->cmap, info);
215         return 0;
216 }
217
218     /*
219      *  Initialisation
220      */
221
222 int __init offb_init(void)
223 {
224         struct device_node *dp = NULL, *boot_disp = NULL;
225
226 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
227         struct device_node *macos_display = NULL;
228 #endif
229         if (fb_get_options("offb", NULL))
230                 return -ENODEV;
231
232 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
233         /* If we're booted from BootX... */
234         if (boot_infos != 0) {
235                 unsigned long addr =
236                     (unsigned long) boot_infos->dispDeviceBase;
237                 u32 *addrp;
238                 u64 daddr, dsize;
239                 unsigned int flags;
240
241                 /* find the device node corresponding to the macos display */
242                 while ((dp = of_find_node_by_type(dp, "display"))) {
243                         int i;
244
245                         /*
246                          * Look for an AAPL,address property first.
247                          */
248                         unsigned int na;
249                         unsigned int *ap =
250                                 (unsigned int *)get_property(dp, "AAPL,address",
251                                                              &na);
252                         if (ap != 0) {
253                                 for (na /= sizeof(unsigned int); na > 0;
254                                      --na, ++ap)
255                                         if (*ap <= addr &&
256                                             addr < *ap + 0x1000000) {
257                                                 macos_display = dp;
258                                                 goto foundit;
259                                         }
260                         }
261
262                         /*
263                          * See if the display address is in one of the address
264                          * ranges for this display.
265                          */
266                         i = 0;
267                         for (;;) {
268                                 addrp = of_get_address(dp, i++, &dsize, &flags);
269                                 if (addrp == NULL)
270                                         break;
271                                 if (!(flags & IORESOURCE_MEM))
272                                         continue;
273                                 daddr = of_translate_address(dp, addrp);
274                                 if (daddr == OF_BAD_ADDR)
275                                         continue;
276                                 if (daddr <= addr && addr < (daddr + dsize)) {
277                                         macos_display = dp;
278                                         goto foundit;
279                                 }
280                         }
281                 foundit:
282                         if (macos_display) {
283                                 printk(KERN_INFO "MacOS display is %s\n",
284                                        dp->full_name);
285                                 break;
286                         }
287                 }
288
289                 /* initialize it */
290                 offb_init_fb(macos_display ? macos_display->
291                              name : "MacOS display",
292                              macos_display ? macos_display->
293                              full_name : "MacOS display",
294                              boot_infos->dispDeviceRect[2],
295                              boot_infos->dispDeviceRect[3],
296                              boot_infos->dispDeviceDepth,
297                              boot_infos->dispDeviceRowBytes, addr, NULL);
298         }
299 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
300
301         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
302                 if (get_property(dp, "linux,opened", NULL) &&
303                     get_property(dp, "linux,boot-display", NULL)) {
304                         boot_disp = dp;
305                         offb_init_nodriver(dp);
306                 }
307         }
308         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
309                 if (get_property(dp, "linux,opened", NULL) &&
310                     dp != boot_disp)
311                         offb_init_nodriver(dp);
312         }
313
314         return 0;
315 }
316
317
318 static void __init offb_init_nodriver(struct device_node *dp)
319 {
320         int *pp, i;
321         unsigned int len;
322         int width = 640, height = 480, depth = 8, pitch;
323         unsigned int flags, rsize, *up;
324         u64 address = OF_BAD_ADDR;
325         u32 *addrp;
326         u64 asize;
327
328         if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
329             && len == sizeof(int))
330                 depth = *pp;
331         if ((pp = (int *) get_property(dp, "width", &len)) != NULL
332             && len == sizeof(int))
333                 width = *pp;
334         if ((pp = (int *) get_property(dp, "height", &len)) != NULL
335             && len == sizeof(int))
336                 height = *pp;
337         if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
338             && len == sizeof(int)) {
339                 pitch = *pp;
340                 if (pitch == 1)
341                         pitch = 0x1000;
342         } else
343                 pitch = width;
344
345        rsize = (unsigned long)pitch * (unsigned long)height *
346                (unsigned long)(depth / 8);
347
348        /* Try to match device to a PCI device in order to get a properly
349         * translated address rather then trying to decode the open firmware
350         * stuff in various incorrect ways
351         */
352 #ifdef CONFIG_PCI
353        /* First try to locate the PCI device if any */
354        {
355                struct pci_dev *pdev = NULL;
356
357                for_each_pci_dev(pdev) {
358                        if (dp == pci_device_to_OF_node(pdev))
359                                break;
360                }
361                if (pdev) {
362                        for (i = 0; i < 6 && address == OF_BAD_ADDR; i++) {
363                                if ((pci_resource_flags(pdev, i) &
364                                     IORESOURCE_MEM) &&
365                                    (pci_resource_len(pdev, i) >= rsize))
366                                        address = pci_resource_start(pdev, i);
367                        }
368                        pci_dev_put(pdev);
369                }
370         }
371 #endif /* CONFIG_PCI */
372
373        /* This one is dodgy, we may drop it ... */
374        if (address == OF_BAD_ADDR &&
375            (up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
376            len == sizeof(unsigned int))
377                address = (u64) * up;
378
379        if (address == OF_BAD_ADDR) {
380                for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
381                             != NULL; i++) {
382                        if (!(flags & IORESOURCE_MEM))
383                                continue;
384                        if (asize >= pitch * height * depth / 8)
385                                break;
386                }
387                 if (addrp == NULL) {
388                         printk(KERN_ERR
389                                "no framebuffer address found for %s\n",
390                                dp->full_name);
391                         return;
392                 }
393                 address = of_translate_address(dp, addrp);
394                 if (address == OF_BAD_ADDR) {
395                         printk(KERN_ERR
396                                "can't translate framebuffer address for %s\n",
397                                dp->full_name);
398                         return;
399                 }
400
401                 /* kludge for valkyrie */
402                 if (strcmp(dp->name, "valkyrie") == 0)
403                         address += 0x1000;
404         }
405         offb_init_fb(dp->name, dp->full_name, width, height, depth,
406                      pitch, address, dp);
407
408 }
409
410 static void __init offb_init_fb(const char *name, const char *full_name,
411                                 int width, int height, int depth,
412                                 int pitch, unsigned long address,
413                                 struct device_node *dp)
414 {
415         unsigned long res_size = pitch * height * depth / 8;
416         struct offb_par *par = &default_par;
417         unsigned long res_start = address;
418         struct fb_fix_screeninfo *fix;
419         struct fb_var_screeninfo *var;
420         struct fb_info *info;
421         int size;
422
423         if (!request_mem_region(res_start, res_size, "offb"))
424                 return;
425
426         printk(KERN_INFO
427                "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
428                width, height, name, address, depth, pitch);
429         if (depth != 8 && depth != 16 && depth != 32) {
430                 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
431                        depth);
432                 release_mem_region(res_start, res_size);
433                 return;
434         }
435
436         size = sizeof(struct fb_info) + sizeof(u32) * 17;
437
438         info = kmalloc(size, GFP_ATOMIC);
439         
440         if (info == 0) {
441                 release_mem_region(res_start, res_size);
442                 return;
443         }
444         memset(info, 0, size);
445
446         fix = &info->fix;
447         var = &info->var;
448
449         strcpy(fix->id, "OFfb ");
450         strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
451         fix->id[sizeof(fix->id) - 1] = '\0';
452
453         var->xres = var->xres_virtual = width;
454         var->yres = var->yres_virtual = height;
455         fix->line_length = pitch;
456
457         fix->smem_start = address;
458         fix->smem_len = pitch * height;
459         fix->type = FB_TYPE_PACKED_PIXELS;
460         fix->type_aux = 0;
461
462         par->cmap_type = cmap_unknown;
463         if (depth == 8) {
464
465                 /* Palette hacks disabled for now */
466 #if 0
467                 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
468                         unsigned long regbase = dp->addrs[2].address;
469                         par->cmap_adr = ioremap(regbase, 0x1FFF);
470                         par->cmap_type = cmap_r128;
471                 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
472                                   || !strncmp(name, "ATY,RageM3p12A", 14))) {
473                         unsigned long regbase =
474                             dp->parent->addrs[2].address;
475                         par->cmap_adr = ioremap(regbase, 0x1FFF);
476                         par->cmap_type = cmap_M3A;
477                 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
478                         unsigned long regbase =
479                             dp->parent->addrs[2].address;
480                         par->cmap_adr = ioremap(regbase, 0x1FFF);
481                         par->cmap_type = cmap_M3B;
482                 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
483                         unsigned long regbase = dp->addrs[1].address;
484                         par->cmap_adr = ioremap(regbase, 0x1FFF);
485                         par->cmap_type = cmap_radeon;
486                 } else if (!strncmp(name, "ATY,", 4)) {
487                         unsigned long base = address & 0xff000000UL;
488                         par->cmap_adr =
489                             ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
490                         par->cmap_data = par->cmap_adr + 1;
491                         par->cmap_type = cmap_m64;
492                 } else if (device_is_compatible(dp, "pci1014,b7")) {
493                         unsigned long regbase = dp->addrs[0].address;
494                         par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
495                         par->cmap_type = cmap_gxt2000;
496                 }
497 #endif
498                 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
499                     : FB_VISUAL_STATIC_PSEUDOCOLOR;
500         } else
501                 fix->visual =   /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
502                                    : */ FB_VISUAL_TRUECOLOR;
503
504         var->xoffset = var->yoffset = 0;
505         var->bits_per_pixel = depth;
506         switch (depth) {
507         case 8:
508                 var->bits_per_pixel = 8;
509                 var->red.offset = 0;
510                 var->red.length = 8;
511                 var->green.offset = 0;
512                 var->green.length = 8;
513                 var->blue.offset = 0;
514                 var->blue.length = 8;
515                 var->transp.offset = 0;
516                 var->transp.length = 0;
517                 break;
518         case 16:                /* RGB 555 */
519                 var->bits_per_pixel = 16;
520                 var->red.offset = 10;
521                 var->red.length = 5;
522                 var->green.offset = 5;
523                 var->green.length = 5;
524                 var->blue.offset = 0;
525                 var->blue.length = 5;
526                 var->transp.offset = 0;
527                 var->transp.length = 0;
528                 break;
529         case 32:                /* RGB 888 */
530                 var->bits_per_pixel = 32;
531                 var->red.offset = 16;
532                 var->red.length = 8;
533                 var->green.offset = 8;
534                 var->green.length = 8;
535                 var->blue.offset = 0;
536                 var->blue.length = 8;
537                 var->transp.offset = 24;
538                 var->transp.length = 8;
539                 break;
540         }
541         var->red.msb_right = var->green.msb_right = var->blue.msb_right =
542             var->transp.msb_right = 0;
543         var->grayscale = 0;
544         var->nonstd = 0;
545         var->activate = 0;
546         var->height = var->width = -1;
547         var->pixclock = 10000;
548         var->left_margin = var->right_margin = 16;
549         var->upper_margin = var->lower_margin = 16;
550         var->hsync_len = var->vsync_len = 8;
551         var->sync = 0;
552         var->vmode = FB_VMODE_NONINTERLACED;
553
554         info->fbops = &offb_ops;
555         info->screen_base = ioremap(address, fix->smem_len);
556         info->par = par;
557         info->pseudo_palette = (void *) (info + 1);
558         info->flags = FBINFO_DEFAULT;
559
560         fb_alloc_cmap(&info->cmap, 256, 0);
561
562         if (register_framebuffer(info) < 0) {
563                 kfree(info);
564                 release_mem_region(res_start, res_size);
565                 return;
566         }
567
568         printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
569                info->node, full_name);
570 }
571
572 module_init(offb_init);
573 MODULE_LICENSE("GPL");