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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / video / offb.c
blob92a41f71e2e072bfe9b821a3bc478d69c06b7541
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/config.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/string.h>
20 #include <linux/mm.h>
21 #include <linux/tty.h>
22 #include <linux/slab.h>
23 #include <linux/vmalloc.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/fb.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <asm/io.h>
30 #include <asm/prom.h>
31
32 #ifdef CONFIG_PPC32
33 #include <asm/bootx.h>
34 #endif
35
36 #include "macmodes.h"
37
38 /* Supported palette hacks */
39 enum {
40 cmap_unknown,
41 cmap_m64, /* ATI Mach64 */
42 cmap_r128, /* ATI Rage128 */
43 cmap_M3A, /* ATI Rage Mobility M3 Head A */
44 cmap_M3B, /* ATI Rage Mobility M3 Head B */
45 cmap_radeon, /* ATI Radeon */
46 cmap_gxt2000, /* IBM GXT2000 */
47 };
48
49 struct offb_par {
50 volatile unsigned char *cmap_adr;
51 volatile unsigned char *cmap_data;
52 int cmap_type;
53 int blanked;
54 };
55
56 struct offb_par default_par;
57
58 #ifdef __powerpc__
59 #define mach_eieio() eieio()
60 #else
61 #define mach_eieio() do {} while (0)
62 #endif
63
64 /*
65 * Interface used by the world
66 */
67
68 int offb_init(void);
69
70 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
71 u_int transp, struct fb_info *info);
72 static int offb_blank(int blank, struct fb_info *info);
73
74 #ifdef CONFIG_PPC32
75 extern boot_infos_t *boot_infos;
76 #endif
77
78 static void offb_init_nodriver(struct device_node *);
79 static void offb_init_fb(const char *name, const char *full_name,
80 int width, int height, int depth, int pitch,
81 unsigned long address, struct device_node *dp);
82
83 static struct fb_ops offb_ops = {
84 .owner = THIS_MODULE,
85 .fb_setcolreg = offb_setcolreg,
86 .fb_blank = offb_blank,
87 .fb_fillrect = cfb_fillrect,
88 .fb_copyarea = cfb_copyarea,
89 .fb_imageblit = cfb_imageblit,
90 .fb_cursor = soft_cursor,
91 };
92
93 /*
94 * Set a single color register. The values supplied are already
95 * rounded down to the hardware's capabilities (according to the
96 * entries in the var structure). Return != 0 for invalid regno.
97 */
98
99 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
100 u_int transp, struct fb_info *info)
101 {
102 struct offb_par *par = (struct offb_par *) info->par;
103
104 if (!par->cmap_adr || regno > 255)
105 return 1;
106
107 red >>= 8;
108 green >>= 8;
109 blue >>= 8;
110
111 switch (par->cmap_type) {
112 case cmap_m64:
113 *par->cmap_adr = regno;
114 mach_eieio();
115 *par->cmap_data = red;
116 mach_eieio();
117 *par->cmap_data = green;
118 mach_eieio();
119 *par->cmap_data = blue;
120 mach_eieio();
121 break;
122 case cmap_M3A:
123 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
124 out_le32((unsigned *) (par->cmap_adr + 0x58),
125 in_le32((unsigned *) (par->cmap_adr +
126 0x58)) & ~0x20);
127 case cmap_r128:
128 /* Set palette index & data */
129 out_8(par->cmap_adr + 0xb0, regno);
130 out_le32((unsigned *) (par->cmap_adr + 0xb4),
131 (red << 16 | green << 8 | blue));
132 break;
133 case cmap_M3B:
134 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
135 out_le32((unsigned *) (par->cmap_adr + 0x58),
136 in_le32((unsigned *) (par->cmap_adr +
137 0x58)) | 0x20);
138 /* Set palette index & data */
139 out_8(par->cmap_adr + 0xb0, regno);
140 out_le32((unsigned *) (par->cmap_adr + 0xb4),
141 (red << 16 | green << 8 | blue));
142 break;
143 case cmap_radeon:
144 /* Set palette index & data (could be smarter) */
145 out_8(par->cmap_adr + 0xb0, regno);
146 out_le32((unsigned *) (par->cmap_adr + 0xb4),
147 (red << 16 | green << 8 | blue));
148 break;
149 case cmap_gxt2000:
150 out_le32((unsigned *) par->cmap_adr + regno,
151 (red << 16 | green << 8 | blue));
152 break;
153 }
154
155 if (regno < 16)
156 switch (info->var.bits_per_pixel) {
157 case 16:
158 ((u16 *) (info->pseudo_palette))[regno] =
159 (regno << 10) | (regno << 5) | regno;
160 break;
161 case 32:
162 {
163 int i = (regno << 8) | regno;
164 ((u32 *) (info->pseudo_palette))[regno] =
165 (i << 16) | i;
166 break;
167 }
168 }
169 return 0;
170 }
171
172 /*
173 * Blank the display.
174 */
175
176 static int offb_blank(int blank, struct fb_info *info)
177 {
178 struct offb_par *par = (struct offb_par *) info->par;
179 int i, j;
180
181 if (!par->cmap_adr)
182 return 0;
183
184 if (!par->blanked)
185 if (!blank)
186 return 0;
187
188 par->blanked = blank;
189
190 if (blank)
191 for (i = 0; i < 256; i++) {
192 switch (par->cmap_type) {
193 case cmap_m64:
194 *par->cmap_adr = i;
195 mach_eieio();
196 for (j = 0; j < 3; j++) {
197 *par->cmap_data = 0;
198 mach_eieio();
199 }
200 break;
201 case cmap_M3A:
202 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
203 out_le32((unsigned *) (par->cmap_adr +
204 0x58),
205 in_le32((unsigned *) (par->
206 cmap_adr +
207 0x58)) &
208 ~0x20);
209 case cmap_r128:
210 /* Set palette index & data */
211 out_8(par->cmap_adr + 0xb0, i);
212 out_le32((unsigned *) (par->cmap_adr +
213 0xb4), 0);
214 break;
215 case cmap_M3B:
216 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
217 out_le32((unsigned *) (par->cmap_adr +
218 0x58),
219 in_le32((unsigned *) (par->
220 cmap_adr +
221 0x58)) |
222 0x20);
223 /* Set palette index & data */
224 out_8(par->cmap_adr + 0xb0, i);
225 out_le32((unsigned *) (par->cmap_adr +
226 0xb4), 0);
227 break;
228 case cmap_radeon:
229 out_8(par->cmap_adr + 0xb0, i);
230 out_le32((unsigned *) (par->cmap_adr +
231 0xb4), 0);
232 break;
233 case cmap_gxt2000:
234 out_le32((unsigned *) par->cmap_adr + i,
235 0);
236 break;
237 }
238 } else
239 fb_set_cmap(&info->cmap, info);
240 return 0;
241 }
242
243 /*
244 * Initialisation
245 */
246
247 int __init offb_init(void)
248 {
249 struct device_node *dp = NULL, *boot_disp = NULL;
250 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
251 struct device_node *macos_display = NULL;
252 #endif
253 if (fb_get_options("offb", NULL))
254 return -ENODEV;
255
256 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
257 /* If we're booted from BootX... */
258 if (boot_infos != 0) {
259 unsigned long addr =
260 (unsigned long) boot_infos->dispDeviceBase;
261 /* find the device node corresponding to the macos display */
262 while ((dp = of_find_node_by_type(dp, "display"))) {
263 int i;
264 /*
265 * Grrr... It looks like the MacOS ATI driver
266 * munges the assigned-addresses property (but
267 * the AAPL,address value is OK).
268 */
269 if (strncmp(dp->name, "ATY,", 4) == 0
270 && dp->n_addrs == 1) {
271 unsigned int *ap =
272 (unsigned int *) get_property(dp,
273 "AAPL,address",
274 NULL);
275 if (ap != NULL) {
276 dp->addrs[0].address = *ap;
277 dp->addrs[0].size = 0x01000000;
278 }
279 }
280
281 /*
282 * The LTPro on the Lombard powerbook has no addresses
283 * on the display nodes, they are on their parent.
284 */
285 if (dp->n_addrs == 0
286 && device_is_compatible(dp, "ATY,264LTPro")) {
287 int na;
288 unsigned int *ap = (unsigned int *)
289 get_property(dp, "AAPL,address", &na);
290 if (ap != 0)
291 for (na /= sizeof(unsigned int);
292 na > 0; --na, ++ap)
293 if (*ap <= addr
294 && addr <
295 *ap + 0x1000000)
296 goto foundit;
297 }
298
299 /*
300 * See if the display address is in one of the address
301 * ranges for this display.
302 */
303 for (i = 0; i < dp->n_addrs; ++i) {
304 if (dp->addrs[i].address <= addr
305 && addr <
306 dp->addrs[i].address +
307 dp->addrs[i].size)
308 break;
309 }
310 if (i < dp->n_addrs) {
311 foundit:
312 printk(KERN_INFO "MacOS display is %s\n",
313 dp->full_name);
314 macos_display = dp;
315 break;
316 }
317 }
318
319 /* initialize it */
320 offb_init_fb(macos_display ? macos_display->
321 name : "MacOS display",
322 macos_display ? macos_display->
323 full_name : "MacOS display",
324 boot_infos->dispDeviceRect[2],
325 boot_infos->dispDeviceRect[3],
326 boot_infos->dispDeviceDepth,
327 boot_infos->dispDeviceRowBytes, addr, NULL);
328 }
329 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
330
331 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
332 if (get_property(dp, "linux,opened", NULL) &&
333 get_property(dp, "linux,boot-display", NULL)) {
334 boot_disp = dp;
335 offb_init_nodriver(dp);
336 }
337 }
338 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
339 if (get_property(dp, "linux,opened", NULL) &&
340 dp != boot_disp)
341 offb_init_nodriver(dp);
342 }
343
344 return 0;
345 }
346
347
348 static void __init offb_init_nodriver(struct device_node *dp)
349 {
350 int *pp, i;
351 unsigned int len;
352 int width = 640, height = 480, depth = 8, pitch;
353 unsigned *up, address;
354
355 if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
356 && len == sizeof(int))
357 depth = *pp;
358 if ((pp = (int *) get_property(dp, "width", &len)) != NULL
359 && len == sizeof(int))
360 width = *pp;
361 if ((pp = (int *) get_property(dp, "height", &len)) != NULL
362 && len == sizeof(int))
363 height = *pp;
364 if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
365 && len == sizeof(int)) {
366 pitch = *pp;
367 if (pitch == 1)
368 pitch = 0x1000;
369 } else
370 pitch = width;
371 if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
372 && len == sizeof(unsigned))
373 address = (u_long) * up;
374 else {
375 for (i = 0; i < dp->n_addrs; ++i)
376 if (dp->addrs[i].size >=
377 pitch * height * depth / 8)
378 break;
379 if (i >= dp->n_addrs) {
380 printk(KERN_ERR
381 "no framebuffer address found for %s\n",
382 dp->full_name);
383 return;
384 }
385
386 address = (u_long) dp->addrs[i].address;
387
388 /* kludge for valkyrie */
389 if (strcmp(dp->name, "valkyrie") == 0)
390 address += 0x1000;
391 }
392 offb_init_fb(dp->name, dp->full_name, width, height, depth,
393 pitch, address, dp);
394
395 }
396
397 static void __init offb_init_fb(const char *name, const char *full_name,
398 int width, int height, int depth,
399 int pitch, unsigned long address,
400 struct device_node *dp)
401 {
402 unsigned long res_size = pitch * height * depth / 8;
403 struct offb_par *par = &default_par;
404 unsigned long res_start = address;
405 struct fb_fix_screeninfo *fix;
406 struct fb_var_screeninfo *var;
407 struct fb_info *info;
408 int size;
409
410 if (!request_mem_region(res_start, res_size, "offb"))
411 return;
412
413 printk(KERN_INFO
414 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
415 width, height, name, address, depth, pitch);
416 if (depth != 8 && depth != 16 && depth != 32) {
417 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
418 depth);
419 release_mem_region(res_start, res_size);
420 return;
421 }
422
423 size = sizeof(struct fb_info) + sizeof(u32) * 17;
424
425 info = kmalloc(size, GFP_ATOMIC);
426
427 if (info == 0) {
428 release_mem_region(res_start, res_size);
429 return;
430 }
431 memset(info, 0, size);
432
433 fix = &info->fix;
434 var = &info->var;
435
436 strcpy(fix->id, "OFfb ");
437 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
438 fix->id[sizeof(fix->id) - 1] = '\0';
439
440 var->xres = var->xres_virtual = width;
441 var->yres = var->yres_virtual = height;
442 fix->line_length = pitch;
443
444 fix->smem_start = address;
445 fix->smem_len = pitch * height;
446 fix->type = FB_TYPE_PACKED_PIXELS;
447 fix->type_aux = 0;
448
449 par->cmap_type = cmap_unknown;
450 if (depth == 8) {
451 /* XXX kludge for ati */
452 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
453 unsigned long regbase = dp->addrs[2].address;
454 par->cmap_adr = ioremap(regbase, 0x1FFF);
455 par->cmap_type = cmap_r128;
456 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
457 || !strncmp(name, "ATY,RageM3p12A", 14))) {
458 unsigned long regbase =
459 dp->parent->addrs[2].address;
460 par->cmap_adr = ioremap(regbase, 0x1FFF);
461 par->cmap_type = cmap_M3A;
462 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
463 unsigned long regbase =
464 dp->parent->addrs[2].address;
465 par->cmap_adr = ioremap(regbase, 0x1FFF);
466 par->cmap_type = cmap_M3B;
467 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
468 unsigned long regbase = dp->addrs[1].address;
469 par->cmap_adr = ioremap(regbase, 0x1FFF);
470 par->cmap_type = cmap_radeon;
471 } else if (!strncmp(name, "ATY,", 4)) {
472 unsigned long base = address & 0xff000000UL;
473 par->cmap_adr =
474 ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
475 par->cmap_data = par->cmap_adr + 1;
476 par->cmap_type = cmap_m64;
477 } else if (device_is_compatible(dp, "pci1014,b7")) {
478 unsigned long regbase = dp->addrs[0].address;
479 par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
480 par->cmap_type = cmap_gxt2000;
481 }
482 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
483 : FB_VISUAL_STATIC_PSEUDOCOLOR;
484 } else
485 fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
486 : */ FB_VISUAL_TRUECOLOR;
487
488 var->xoffset = var->yoffset = 0;
489 var->bits_per_pixel = depth;
490 switch (depth) {
491 case 8:
492 var->bits_per_pixel = 8;
493 var->red.offset = 0;
494 var->red.length = 8;
495 var->green.offset = 0;
496 var->green.length = 8;
497 var->blue.offset = 0;
498 var->blue.length = 8;
499 var->transp.offset = 0;
500 var->transp.length = 0;
501 break;
502 case 16: /* RGB 555 */
503 var->bits_per_pixel = 16;
504 var->red.offset = 10;
505 var->red.length = 5;
506 var->green.offset = 5;
507 var->green.length = 5;
508 var->blue.offset = 0;
509 var->blue.length = 5;
510 var->transp.offset = 0;
511 var->transp.length = 0;
512 break;
513 case 32: /* RGB 888 */
514 var->bits_per_pixel = 32;
515 var->red.offset = 16;
516 var->red.length = 8;
517 var->green.offset = 8;
518 var->green.length = 8;
519 var->blue.offset = 0;
520 var->blue.length = 8;
521 var->transp.offset = 24;
522 var->transp.length = 8;
523 break;
524 }
525 var->red.msb_right = var->green.msb_right = var->blue.msb_right =
526 var->transp.msb_right = 0;
527 var->grayscale = 0;
528 var->nonstd = 0;
529 var->activate = 0;
530 var->height = var->width = -1;
531 var->pixclock = 10000;
532 var->left_margin = var->right_margin = 16;
533 var->upper_margin = var->lower_margin = 16;
534 var->hsync_len = var->vsync_len = 8;
535 var->sync = 0;
536 var->vmode = FB_VMODE_NONINTERLACED;
537
538 info->fbops = &offb_ops;
539 info->screen_base = ioremap(address, fix->smem_len);
540 info->par = par;
541 info->pseudo_palette = (void *) (info + 1);
542 info->flags = FBINFO_DEFAULT;
543
544 fb_alloc_cmap(&info->cmap, 256, 0);
545
546 if (register_framebuffer(info) < 0) {
547 kfree(info);
548 release_mem_region(res_start, res_size);
549 return;
550 }
551
552 printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
553 info->node, full_name);
554 }
555
556 module_init(offb_init);
557 MODULE_LICENSE("GPL");
MOXA 2.6.9 from sdlinux-moxaart.tgz