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[mirror_ubuntu-bionic-kernel.git] / 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/vmalloc.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/fb.h>
24 #include <linux/init.h>
25 #include <linux/ioport.h>
26 #include <linux/pci.h>
27 #include <asm/io.h>
28 #include <asm/prom.h>
29
30 #ifdef CONFIG_PPC64
31 #include <asm/pci-bridge.h>
32 #endif
33
34 #ifdef CONFIG_PPC32
35 #include <asm/bootx.h>
36 #endif
37
38 #include "macmodes.h"
39
40 /* Supported palette hacks */
41 enum {
42 cmap_unknown,
43 cmap_m64, /* ATI Mach64 */
44 cmap_r128, /* ATI Rage128 */
45 cmap_M3A, /* ATI Rage Mobility M3 Head A */
46 cmap_M3B, /* ATI Rage Mobility M3 Head B */
47 cmap_radeon, /* ATI Radeon */
48 cmap_gxt2000, /* IBM GXT2000 */
49 cmap_avivo, /* ATI R5xx */
50 };
51
52 struct offb_par {
53 volatile void __iomem *cmap_adr;
54 volatile void __iomem *cmap_data;
55 int cmap_type;
56 int blanked;
57 };
58
59 struct offb_par default_par;
60
61 #ifdef CONFIG_PPC32
62 extern boot_infos_t *boot_infos;
63 #endif
64
65 /* Definitions used by the Avivo palette hack */
66 #define AVIVO_DC_LUT_RW_SELECT 0x6480
67 #define AVIVO_DC_LUT_RW_MODE 0x6484
68 #define AVIVO_DC_LUT_RW_INDEX 0x6488
69 #define AVIVO_DC_LUT_SEQ_COLOR 0x648c
70 #define AVIVO_DC_LUT_PWL_DATA 0x6490
71 #define AVIVO_DC_LUT_30_COLOR 0x6494
72 #define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498
73 #define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c
74 #define AVIVO_DC_LUT_AUTOFILL 0x64a0
75
76 #define AVIVO_DC_LUTA_CONTROL 0x64c0
77 #define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4
78 #define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8
79 #define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc
80 #define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0
81 #define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4
82 #define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8
83
84 #define AVIVO_DC_LUTB_CONTROL 0x6cc0
85 #define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4
86 #define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8
87 #define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc
88 #define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0
89 #define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
90 #define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8
91
92 /*
93 * Set a single color register. The values supplied are already
94 * rounded down to the hardware's capabilities (according to the
95 * entries in the var structure). Return != 0 for invalid regno.
96 */
97
98 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
99 u_int transp, struct fb_info *info)
100 {
101 struct offb_par *par = (struct offb_par *) info->par;
102 int i, depth;
103 u32 *pal = info->pseudo_palette;
104
105 depth = info->var.bits_per_pixel;
106 if (depth == 16)
107 depth = (info->var.green.length == 5) ? 15 : 16;
108
109 if (regno > 255 ||
110 (depth == 16 && regno > 63) ||
111 (depth == 15 && regno > 31))
112 return 1;
113
114 if (regno < 16) {
115 switch (depth) {
116 case 15:
117 pal[regno] = (regno << 10) | (regno << 5) | regno;
118 break;
119 case 16:
120 pal[regno] = (regno << 11) | (regno << 5) | regno;
121 break;
122 case 24:
123 pal[regno] = (regno << 16) | (regno << 8) | regno;
124 break;
125 case 32:
126 i = (regno << 8) | regno;
127 pal[regno] = (i << 16) | i;
128 break;
129 }
130 }
131
132 red >>= 8;
133 green >>= 8;
134 blue >>= 8;
135
136 if (!par->cmap_adr)
137 return 0;
138
139 switch (par->cmap_type) {
140 case cmap_m64:
141 writeb(regno, par->cmap_adr);
142 writeb(red, par->cmap_data);
143 writeb(green, par->cmap_data);
144 writeb(blue, par->cmap_data);
145 break;
146 case cmap_M3A:
147 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
148 out_le32(par->cmap_adr + 0x58,
149 in_le32(par->cmap_adr + 0x58) & ~0x20);
150 case cmap_r128:
151 /* Set palette index & data */
152 out_8(par->cmap_adr + 0xb0, regno);
153 out_le32(par->cmap_adr + 0xb4,
154 (red << 16 | green << 8 | blue));
155 break;
156 case cmap_M3B:
157 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
158 out_le32(par->cmap_adr + 0x58,
159 in_le32(par->cmap_adr + 0x58) | 0x20);
160 /* Set palette index & data */
161 out_8(par->cmap_adr + 0xb0, regno);
162 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
163 break;
164 case cmap_radeon:
165 /* Set palette index & data (could be smarter) */
166 out_8(par->cmap_adr + 0xb0, regno);
167 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
168 break;
169 case cmap_gxt2000:
170 out_le32(((unsigned __iomem *) par->cmap_adr) + regno,
171 (red << 16 | green << 8 | blue));
172 break;
173 case cmap_avivo:
174 /* Write to both LUTs for now */
175 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
176 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
177 writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
178 par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
179 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
180 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
181 writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
182 par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
183 break;
184 }
185
186 return 0;
187 }
188
189 /*
190 * Blank the display.
191 */
192
193 static int offb_blank(int blank, struct fb_info *info)
194 {
195 struct offb_par *par = (struct offb_par *) info->par;
196 int i, j;
197
198 if (!par->cmap_adr)
199 return 0;
200
201 if (!par->blanked)
202 if (!blank)
203 return 0;
204
205 par->blanked = blank;
206
207 if (blank)
208 for (i = 0; i < 256; i++) {
209 switch (par->cmap_type) {
210 case cmap_m64:
211 writeb(i, par->cmap_adr);
212 for (j = 0; j < 3; j++)
213 writeb(0, par->cmap_data);
214 break;
215 case cmap_M3A:
216 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
217 out_le32(par->cmap_adr + 0x58,
218 in_le32(par->cmap_adr + 0x58) & ~0x20);
219 case cmap_r128:
220 /* Set palette index & data */
221 out_8(par->cmap_adr + 0xb0, i);
222 out_le32(par->cmap_adr + 0xb4, 0);
223 break;
224 case cmap_M3B:
225 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
226 out_le32(par->cmap_adr + 0x58,
227 in_le32(par->cmap_adr + 0x58) | 0x20);
228 /* Set palette index & data */
229 out_8(par->cmap_adr + 0xb0, i);
230 out_le32(par->cmap_adr + 0xb4, 0);
231 break;
232 case cmap_radeon:
233 out_8(par->cmap_adr + 0xb0, i);
234 out_le32(par->cmap_adr + 0xb4, 0);
235 break;
236 case cmap_gxt2000:
237 out_le32(((unsigned __iomem *) par->cmap_adr) + i,
238 0);
239 break;
240 case cmap_avivo:
241 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
242 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
243 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
244 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
245 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
246 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
247 break;
248 }
249 } else
250 fb_set_cmap(&info->cmap, info);
251 return 0;
252 }
253
254 static int offb_set_par(struct fb_info *info)
255 {
256 struct offb_par *par = (struct offb_par *) info->par;
257
258 /* On avivo, initialize palette control */
259 if (par->cmap_type == cmap_avivo) {
260 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL);
261 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE);
262 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN);
263 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED);
264 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE);
265 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN);
266 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED);
267 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL);
268 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE);
269 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN);
270 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED);
271 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE);
272 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN);
273 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED);
274 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
275 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
276 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
277 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
278 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
279 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
280 }
281 return 0;
282 }
283
284 static void offb_destroy(struct fb_info *info)
285 {
286 if (info->screen_base)
287 iounmap(info->screen_base);
288 release_mem_region(info->aperture_base, info->aperture_size);
289 framebuffer_release(info);
290 }
291
292 static struct fb_ops offb_ops = {
293 .owner = THIS_MODULE,
294 .fb_destroy = offb_destroy,
295 .fb_setcolreg = offb_setcolreg,
296 .fb_set_par = offb_set_par,
297 .fb_blank = offb_blank,
298 .fb_fillrect = cfb_fillrect,
299 .fb_copyarea = cfb_copyarea,
300 .fb_imageblit = cfb_imageblit,
301 };
302
303 static void __iomem *offb_map_reg(struct device_node *np, int index,
304 unsigned long offset, unsigned long size)
305 {
306 const u32 *addrp;
307 u64 asize, taddr;
308 unsigned int flags;
309
310 addrp = of_get_pci_address(np, index, &asize, &flags);
311 if (addrp == NULL)
312 addrp = of_get_address(np, index, &asize, &flags);
313 if (addrp == NULL)
314 return NULL;
315 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
316 return NULL;
317 if ((offset + size) > asize)
318 return NULL;
319 taddr = of_translate_address(np, addrp);
320 if (taddr == OF_BAD_ADDR)
321 return NULL;
322 return ioremap(taddr + offset, size);
323 }
324
325 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp,
326 const char *name, unsigned long address)
327 {
328 struct offb_par *par = (struct offb_par *) info->par;
329
330 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
331 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
332 if (par->cmap_adr)
333 par->cmap_type = cmap_r128;
334 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
335 || !strncmp(name, "ATY,RageM3p12A", 14))) {
336 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
337 if (par->cmap_adr)
338 par->cmap_type = cmap_M3A;
339 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
340 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
341 if (par->cmap_adr)
342 par->cmap_type = cmap_M3B;
343 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
344 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
345 if (par->cmap_adr)
346 par->cmap_type = cmap_radeon;
347 } else if (!strncmp(name, "ATY,", 4)) {
348 unsigned long base = address & 0xff000000UL;
349 par->cmap_adr =
350 ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
351 par->cmap_data = par->cmap_adr + 1;
352 par->cmap_type = cmap_m64;
353 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
354 of_device_is_compatible(dp, "pci1014,21c"))) {
355 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
356 if (par->cmap_adr)
357 par->cmap_type = cmap_gxt2000;
358 } else if (dp && !strncmp(name, "vga,Display-", 12)) {
359 /* Look for AVIVO initialized by SLOF */
360 struct device_node *pciparent = of_get_parent(dp);
361 const u32 *vid, *did;
362 vid = of_get_property(pciparent, "vendor-id", NULL);
363 did = of_get_property(pciparent, "device-id", NULL);
364 /* This will match most R5xx */
365 if (vid && did && *vid == 0x1002 &&
366 ((*did >= 0x7100 && *did < 0x7800) ||
367 (*did >= 0x9400))) {
368 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000);
369 if (par->cmap_adr)
370 par->cmap_type = cmap_avivo;
371 }
372 of_node_put(pciparent);
373 }
374 info->fix.visual = (par->cmap_type != cmap_unknown) ?
375 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
376 }
377
378 static void __init offb_init_fb(const char *name, const char *full_name,
379 int width, int height, int depth,
380 int pitch, unsigned long address,
381 int foreign_endian, struct device_node *dp)
382 {
383 unsigned long res_size = pitch * height * (depth + 7) / 8;
384 struct offb_par *par = &default_par;
385 unsigned long res_start = address;
386 struct fb_fix_screeninfo *fix;
387 struct fb_var_screeninfo *var;
388 struct fb_info *info;
389
390 if (!request_mem_region(res_start, res_size, "offb"))
391 return;
392
393 printk(KERN_INFO
394 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
395 width, height, name, address, depth, pitch);
396 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) {
397 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
398 depth);
399 release_mem_region(res_start, res_size);
400 return;
401 }
402
403 info = framebuffer_alloc(sizeof(u32) * 16, NULL);
404
405 if (info == 0) {
406 release_mem_region(res_start, res_size);
407 return;
408 }
409
410 fix = &info->fix;
411 var = &info->var;
412 info->par = par;
413
414 strcpy(fix->id, "OFfb ");
415 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
416 fix->id[sizeof(fix->id) - 1] = '\0';
417
418 var->xres = var->xres_virtual = width;
419 var->yres = var->yres_virtual = height;
420 fix->line_length = pitch;
421
422 fix->smem_start = address;
423 fix->smem_len = pitch * height;
424 fix->type = FB_TYPE_PACKED_PIXELS;
425 fix->type_aux = 0;
426
427 par->cmap_type = cmap_unknown;
428 if (depth == 8)
429 offb_init_palette_hacks(info, dp, name, address);
430 else
431 fix->visual = FB_VISUAL_TRUECOLOR;
432
433 var->xoffset = var->yoffset = 0;
434 switch (depth) {
435 case 8:
436 var->bits_per_pixel = 8;
437 var->red.offset = 0;
438 var->red.length = 8;
439 var->green.offset = 0;
440 var->green.length = 8;
441 var->blue.offset = 0;
442 var->blue.length = 8;
443 var->transp.offset = 0;
444 var->transp.length = 0;
445 break;
446 case 15: /* RGB 555 */
447 var->bits_per_pixel = 16;
448 var->red.offset = 10;
449 var->red.length = 5;
450 var->green.offset = 5;
451 var->green.length = 5;
452 var->blue.offset = 0;
453 var->blue.length = 5;
454 var->transp.offset = 0;
455 var->transp.length = 0;
456 break;
457 case 16: /* RGB 565 */
458 var->bits_per_pixel = 16;
459 var->red.offset = 11;
460 var->red.length = 5;
461 var->green.offset = 5;
462 var->green.length = 6;
463 var->blue.offset = 0;
464 var->blue.length = 5;
465 var->transp.offset = 0;
466 var->transp.length = 0;
467 break;
468 case 32: /* RGB 888 */
469 var->bits_per_pixel = 32;
470 var->red.offset = 16;
471 var->red.length = 8;
472 var->green.offset = 8;
473 var->green.length = 8;
474 var->blue.offset = 0;
475 var->blue.length = 8;
476 var->transp.offset = 24;
477 var->transp.length = 8;
478 break;
479 }
480 var->red.msb_right = var->green.msb_right = var->blue.msb_right =
481 var->transp.msb_right = 0;
482 var->grayscale = 0;
483 var->nonstd = 0;
484 var->activate = 0;
485 var->height = var->width = -1;
486 var->pixclock = 10000;
487 var->left_margin = var->right_margin = 16;
488 var->upper_margin = var->lower_margin = 16;
489 var->hsync_len = var->vsync_len = 8;
490 var->sync = 0;
491 var->vmode = FB_VMODE_NONINTERLACED;
492
493 /* set offb aperture size for generic probing */
494 info->aperture_base = address;
495 info->aperture_size = fix->smem_len;
496
497 info->fbops = &offb_ops;
498 info->screen_base = ioremap(address, fix->smem_len);
499 info->pseudo_palette = (void *) (info + 1);
500 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian;
501
502 fb_alloc_cmap(&info->cmap, 256, 0);
503
504 if (register_framebuffer(info) < 0) {
505 iounmap(par->cmap_adr);
506 par->cmap_adr = NULL;
507 iounmap(info->screen_base);
508 framebuffer_release(info);
509 release_mem_region(res_start, res_size);
510 return;
511 }
512
513 printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
514 info->node, full_name);
515 }
516
517
518 static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
519 {
520 unsigned int len;
521 int i, width = 640, height = 480, depth = 8, pitch = 640;
522 unsigned int flags, rsize, addr_prop = 0;
523 unsigned long max_size = 0;
524 u64 rstart, address = OF_BAD_ADDR;
525 const u32 *pp, *addrp, *up;
526 u64 asize;
527 int foreign_endian = 0;
528
529 #ifdef __BIG_ENDIAN
530 if (of_get_property(dp, "little-endian", NULL))
531 foreign_endian = FBINFO_FOREIGN_ENDIAN;
532 #else
533 if (of_get_property(dp, "big-endian", NULL))
534 foreign_endian = FBINFO_FOREIGN_ENDIAN;
535 #endif
536
537 pp = of_get_property(dp, "linux,bootx-depth", &len);
538 if (pp == NULL)
539 pp = of_get_property(dp, "depth", &len);
540 if (pp && len == sizeof(u32))
541 depth = *pp;
542
543 pp = of_get_property(dp, "linux,bootx-width", &len);
544 if (pp == NULL)
545 pp = of_get_property(dp, "width", &len);
546 if (pp && len == sizeof(u32))
547 width = *pp;
548
549 pp = of_get_property(dp, "linux,bootx-height", &len);
550 if (pp == NULL)
551 pp = of_get_property(dp, "height", &len);
552 if (pp && len == sizeof(u32))
553 height = *pp;
554
555 pp = of_get_property(dp, "linux,bootx-linebytes", &len);
556 if (pp == NULL)
557 pp = of_get_property(dp, "linebytes", &len);
558 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu))
559 pitch = *pp;
560 else
561 pitch = width * ((depth + 7) / 8);
562
563 rsize = (unsigned long)pitch * (unsigned long)height;
564
565 /* Ok, now we try to figure out the address of the framebuffer.
566 *
567 * Unfortunately, Open Firmware doesn't provide a standard way to do
568 * so. All we can do is a dodgy heuristic that happens to work in
569 * practice. On most machines, the "address" property contains what
570 * we need, though not on Matrox cards found in IBM machines. What I've
571 * found that appears to give good results is to go through the PCI
572 * ranges and pick one that is both big enough and if possible encloses
573 * the "address" property. If none match, we pick the biggest
574 */
575 up = of_get_property(dp, "linux,bootx-addr", &len);
576 if (up == NULL)
577 up = of_get_property(dp, "address", &len);
578 if (up && len == sizeof(u32))
579 addr_prop = *up;
580
581 /* Hack for when BootX is passing us */
582 if (no_real_node)
583 goto skip_addr;
584
585 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
586 != NULL; i++) {
587 int match_addrp = 0;
588
589 if (!(flags & IORESOURCE_MEM))
590 continue;
591 if (asize < rsize)
592 continue;
593 rstart = of_translate_address(dp, addrp);
594 if (rstart == OF_BAD_ADDR)
595 continue;
596 if (addr_prop && (rstart <= addr_prop) &&
597 ((rstart + asize) >= (addr_prop + rsize)))
598 match_addrp = 1;
599 if (match_addrp) {
600 address = addr_prop;
601 break;
602 }
603 if (rsize > max_size) {
604 max_size = rsize;
605 address = OF_BAD_ADDR;
606 }
607
608 if (address == OF_BAD_ADDR)
609 address = rstart;
610 }
611 skip_addr:
612 if (address == OF_BAD_ADDR && addr_prop)
613 address = (u64)addr_prop;
614 if (address != OF_BAD_ADDR) {
615 /* kludge for valkyrie */
616 if (strcmp(dp->name, "valkyrie") == 0)
617 address += 0x1000;
618 offb_init_fb(no_real_node ? "bootx" : dp->name,
619 no_real_node ? "display" : dp->full_name,
620 width, height, depth, pitch, address,
621 foreign_endian, no_real_node ? NULL : dp);
622 }
623 }
624
625 static int __init offb_init(void)
626 {
627 struct device_node *dp = NULL, *boot_disp = NULL;
628
629 if (fb_get_options("offb", NULL))
630 return -ENODEV;
631
632 /* Check if we have a MacOS display without a node spec */
633 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
634 /* The old code tried to work out which node was the MacOS
635 * display based on the address. I'm dropping that since the
636 * lack of a node spec only happens with old BootX versions
637 * (users can update) and with this code, they'll still get
638 * a display (just not the palette hacks).
639 */
640 offb_init_nodriver(of_chosen, 1);
641 }
642
643 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
644 if (of_get_property(dp, "linux,opened", NULL) &&
645 of_get_property(dp, "linux,boot-display", NULL)) {
646 boot_disp = dp;
647 offb_init_nodriver(dp, 0);
648 }
649 }
650 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
651 if (of_get_property(dp, "linux,opened", NULL) &&
652 dp != boot_disp)
653 offb_init_nodriver(dp, 0);
654 }
655
656 return 0;
657 }
658
659
660 module_init(offb_init);
661 MODULE_LICENSE("GPL");
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