]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - drivers/video/fbdev/offb.c
projects / mirror_ubuntu-focal-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[mirror_ubuntu-focal-kernel.git] / drivers / video / fbdev / 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/of.h>
23 #include <linux/of_address.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
31 #ifdef CONFIG_PPC32
32 #include <asm/bootx.h>
33 #endif
34
35 #include "macmodes.h"
36
37 /* Supported palette hacks */
38 enum {
39 cmap_unknown,
40 cmap_simple, /* ATI Mach64 */
41 cmap_r128, /* ATI Rage128 */
42 cmap_M3A, /* ATI Rage Mobility M3 Head A */
43 cmap_M3B, /* ATI Rage Mobility M3 Head B */
44 cmap_radeon, /* ATI Radeon */
45 cmap_gxt2000, /* IBM GXT2000 */
46 cmap_avivo, /* ATI R5xx */
47 cmap_qemu, /* qemu vga */
48 };
49
50 struct offb_par {
51 volatile void __iomem *cmap_adr;
52 volatile void __iomem *cmap_data;
53 int cmap_type;
54 int blanked;
55 };
56
57 struct offb_par default_par;
58
59 #ifdef CONFIG_PPC32
60 extern boot_infos_t *boot_infos;
61 #endif
62
63 /* Definitions used by the Avivo palette hack */
64 #define AVIVO_DC_LUT_RW_SELECT 0x6480
65 #define AVIVO_DC_LUT_RW_MODE 0x6484
66 #define AVIVO_DC_LUT_RW_INDEX 0x6488
67 #define AVIVO_DC_LUT_SEQ_COLOR 0x648c
68 #define AVIVO_DC_LUT_PWL_DATA 0x6490
69 #define AVIVO_DC_LUT_30_COLOR 0x6494
70 #define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498
71 #define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c
72 #define AVIVO_DC_LUT_AUTOFILL 0x64a0
73
74 #define AVIVO_DC_LUTA_CONTROL 0x64c0
75 #define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4
76 #define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8
77 #define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc
78 #define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0
79 #define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4
80 #define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8
81
82 #define AVIVO_DC_LUTB_CONTROL 0x6cc0
83 #define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4
84 #define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8
85 #define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc
86 #define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0
87 #define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
88 #define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8
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 (info->fix.visual == FB_VISUAL_TRUECOLOR) {
102 u32 *pal = info->pseudo_palette;
103 u32 cr = red >> (16 - info->var.red.length);
104 u32 cg = green >> (16 - info->var.green.length);
105 u32 cb = blue >> (16 - info->var.blue.length);
106 u32 value;
107
108 if (regno >= 16)
109 return -EINVAL;
110
111 value = (cr << info->var.red.offset) |
112 (cg << info->var.green.offset) |
113 (cb << info->var.blue.offset);
114 if (info->var.transp.length > 0) {
115 u32 mask = (1 << info->var.transp.length) - 1;
116 mask <<= info->var.transp.offset;
117 value |= mask;
118 }
119 pal[regno] = value;
120 return 0;
121 }
122
123 if (regno > 255)
124 return -EINVAL;
125
126 red >>= 8;
127 green >>= 8;
128 blue >>= 8;
129
130 if (!par->cmap_adr)
131 return 0;
132
133 switch (par->cmap_type) {
134 case cmap_simple:
135 writeb(regno, par->cmap_adr);
136 writeb(red, par->cmap_data);
137 writeb(green, par->cmap_data);
138 writeb(blue, par->cmap_data);
139 break;
140 case cmap_M3A:
141 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
142 out_le32(par->cmap_adr + 0x58,
143 in_le32(par->cmap_adr + 0x58) & ~0x20);
144 case cmap_r128:
145 /* Set palette index & data */
146 out_8(par->cmap_adr + 0xb0, regno);
147 out_le32(par->cmap_adr + 0xb4,
148 (red << 16 | green << 8 | blue));
149 break;
150 case cmap_M3B:
151 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
152 out_le32(par->cmap_adr + 0x58,
153 in_le32(par->cmap_adr + 0x58) | 0x20);
154 /* Set palette index & data */
155 out_8(par->cmap_adr + 0xb0, regno);
156 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
157 break;
158 case cmap_radeon:
159 /* Set palette index & data (could be smarter) */
160 out_8(par->cmap_adr + 0xb0, regno);
161 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
162 break;
163 case cmap_gxt2000:
164 out_le32(((unsigned __iomem *) par->cmap_adr) + regno,
165 (red << 16 | green << 8 | blue));
166 break;
167 case cmap_avivo:
168 /* Write to both LUTs for now */
169 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
170 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
171 writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
172 par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
173 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
174 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
175 writel(((red) << 22) | ((green) << 12) | ((blue) << 2),
176 par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
177 break;
178 }
179
180 return 0;
181 }
182
183 /*
184 * Blank the display.
185 */
186
187 static int offb_blank(int blank, struct fb_info *info)
188 {
189 struct offb_par *par = (struct offb_par *) info->par;
190 int i, j;
191
192 if (!par->cmap_adr)
193 return 0;
194
195 if (!par->blanked)
196 if (!blank)
197 return 0;
198
199 par->blanked = blank;
200
201 if (blank)
202 for (i = 0; i < 256; i++) {
203 switch (par->cmap_type) {
204 case cmap_simple:
205 writeb(i, par->cmap_adr);
206 for (j = 0; j < 3; j++)
207 writeb(0, par->cmap_data);
208 break;
209 case cmap_M3A:
210 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
211 out_le32(par->cmap_adr + 0x58,
212 in_le32(par->cmap_adr + 0x58) & ~0x20);
213 case cmap_r128:
214 /* Set palette index & data */
215 out_8(par->cmap_adr + 0xb0, i);
216 out_le32(par->cmap_adr + 0xb4, 0);
217 break;
218 case cmap_M3B:
219 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
220 out_le32(par->cmap_adr + 0x58,
221 in_le32(par->cmap_adr + 0x58) | 0x20);
222 /* Set palette index & data */
223 out_8(par->cmap_adr + 0xb0, i);
224 out_le32(par->cmap_adr + 0xb4, 0);
225 break;
226 case cmap_radeon:
227 out_8(par->cmap_adr + 0xb0, i);
228 out_le32(par->cmap_adr + 0xb4, 0);
229 break;
230 case cmap_gxt2000:
231 out_le32(((unsigned __iomem *) par->cmap_adr) + i,
232 0);
233 break;
234 case cmap_avivo:
235 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
236 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
237 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
238 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
239 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX);
240 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR);
241 break;
242 }
243 } else
244 fb_set_cmap(&info->cmap, info);
245 return 0;
246 }
247
248 static int offb_set_par(struct fb_info *info)
249 {
250 struct offb_par *par = (struct offb_par *) info->par;
251
252 /* On avivo, initialize palette control */
253 if (par->cmap_type == cmap_avivo) {
254 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL);
255 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE);
256 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN);
257 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED);
258 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE);
259 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN);
260 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED);
261 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL);
262 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE);
263 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN);
264 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED);
265 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE);
266 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN);
267 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED);
268 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
269 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
270 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
271 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT);
272 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE);
273 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK);
274 }
275 return 0;
276 }
277
278 static void offb_destroy(struct fb_info *info)
279 {
280 if (info->screen_base)
281 iounmap(info->screen_base);
282 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
283 framebuffer_release(info);
284 }
285
286 static struct fb_ops offb_ops = {
287 .owner = THIS_MODULE,
288 .fb_destroy = offb_destroy,
289 .fb_setcolreg = offb_setcolreg,
290 .fb_set_par = offb_set_par,
291 .fb_blank = offb_blank,
292 .fb_fillrect = cfb_fillrect,
293 .fb_copyarea = cfb_copyarea,
294 .fb_imageblit = cfb_imageblit,
295 };
296
297 static void __iomem *offb_map_reg(struct device_node *np, int index,
298 unsigned long offset, unsigned long size)
299 {
300 const __be32 *addrp;
301 u64 asize, taddr;
302 unsigned int flags;
303
304 addrp = of_get_pci_address(np, index, &asize, &flags);
305 if (addrp == NULL)
306 addrp = of_get_address(np, index, &asize, &flags);
307 if (addrp == NULL)
308 return NULL;
309 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
310 return NULL;
311 if ((offset + size) > asize)
312 return NULL;
313 taddr = of_translate_address(np, addrp);
314 if (taddr == OF_BAD_ADDR)
315 return NULL;
316 return ioremap(taddr + offset, size);
317 }
318
319 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp,
320 const char *name, unsigned long address)
321 {
322 struct offb_par *par = (struct offb_par *) info->par;
323
324 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
325 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
326 if (par->cmap_adr)
327 par->cmap_type = cmap_r128;
328 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
329 || !strncmp(name, "ATY,RageM3p12A", 14))) {
330 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
331 if (par->cmap_adr)
332 par->cmap_type = cmap_M3A;
333 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
334 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
335 if (par->cmap_adr)
336 par->cmap_type = cmap_M3B;
337 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
338 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
339 if (par->cmap_adr)
340 par->cmap_type = cmap_radeon;
341 } else if (!strncmp(name, "ATY,", 4)) {
342 unsigned long base = address & 0xff000000UL;
343 par->cmap_adr =
344 ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
345 par->cmap_data = par->cmap_adr + 1;
346 par->cmap_type = cmap_simple;
347 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
348 of_device_is_compatible(dp, "pci1014,21c"))) {
349 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
350 if (par->cmap_adr)
351 par->cmap_type = cmap_gxt2000;
352 } else if (dp && !strncmp(name, "vga,Display-", 12)) {
353 /* Look for AVIVO initialized by SLOF */
354 struct device_node *pciparent = of_get_parent(dp);
355 const u32 *vid, *did;
356 vid = of_get_property(pciparent, "vendor-id", NULL);
357 did = of_get_property(pciparent, "device-id", NULL);
358 /* This will match most R5xx */
359 if (vid && did && *vid == 0x1002 &&
360 ((*did >= 0x7100 && *did < 0x7800) ||
361 (*did >= 0x9400))) {
362 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000);
363 if (par->cmap_adr)
364 par->cmap_type = cmap_avivo;
365 }
366 of_node_put(pciparent);
367 } else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) {
368 #ifdef __BIG_ENDIAN
369 const __be32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 };
370 #else
371 const __be32 io_of_addr[3] = { 0x00000001, 0x0, 0x0 };
372 #endif
373 u64 io_addr = of_translate_address(dp, io_of_addr);
374 if (io_addr != OF_BAD_ADDR) {
375 par->cmap_adr = ioremap(io_addr + 0x3c8, 2);
376 if (par->cmap_adr) {
377 par->cmap_type = cmap_simple;
378 par->cmap_data = par->cmap_adr + 1;
379 }
380 }
381 }
382 info->fix.visual = (par->cmap_type != cmap_unknown) ?
383 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
384 }
385
386 static void __init offb_init_fb(const char *name,
387 int width, int height, int depth,
388 int pitch, unsigned long address,
389 int foreign_endian, struct device_node *dp)
390 {
391 unsigned long res_size = pitch * height;
392 struct offb_par *par = &default_par;
393 unsigned long res_start = address;
394 struct fb_fix_screeninfo *fix;
395 struct fb_var_screeninfo *var;
396 struct fb_info *info;
397
398 if (!request_mem_region(res_start, res_size, "offb"))
399 return;
400
401 printk(KERN_INFO
402 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
403 width, height, name, address, depth, pitch);
404 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) {
405 printk(KERN_ERR "%pOF: can't use depth = %d\n", dp, depth);
406 release_mem_region(res_start, res_size);
407 return;
408 }
409
410 info = framebuffer_alloc(sizeof(u32) * 16, NULL);
411
412 if (info == 0) {
413 release_mem_region(res_start, res_size);
414 return;
415 }
416
417 fix = &info->fix;
418 var = &info->var;
419 info->par = par;
420
421 strcpy(fix->id, "OFfb ");
422 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
423 fix->id[sizeof(fix->id) - 1] = '\0';
424
425 var->xres = var->xres_virtual = width;
426 var->yres = var->yres_virtual = height;
427 fix->line_length = pitch;
428
429 fix->smem_start = address;
430 fix->smem_len = pitch * height;
431 fix->type = FB_TYPE_PACKED_PIXELS;
432 fix->type_aux = 0;
433
434 par->cmap_type = cmap_unknown;
435 if (depth == 8)
436 offb_init_palette_hacks(info, dp, name, address);
437 else
438 fix->visual = FB_VISUAL_TRUECOLOR;
439
440 var->xoffset = var->yoffset = 0;
441 switch (depth) {
442 case 8:
443 var->bits_per_pixel = 8;
444 var->red.offset = 0;
445 var->red.length = 8;
446 var->green.offset = 0;
447 var->green.length = 8;
448 var->blue.offset = 0;
449 var->blue.length = 8;
450 var->transp.offset = 0;
451 var->transp.length = 0;
452 break;
453 case 15: /* RGB 555 */
454 var->bits_per_pixel = 16;
455 var->red.offset = 10;
456 var->red.length = 5;
457 var->green.offset = 5;
458 var->green.length = 5;
459 var->blue.offset = 0;
460 var->blue.length = 5;
461 var->transp.offset = 0;
462 var->transp.length = 0;
463 break;
464 case 16: /* RGB 565 */
465 var->bits_per_pixel = 16;
466 var->red.offset = 11;
467 var->red.length = 5;
468 var->green.offset = 5;
469 var->green.length = 6;
470 var->blue.offset = 0;
471 var->blue.length = 5;
472 var->transp.offset = 0;
473 var->transp.length = 0;
474 break;
475 case 32: /* RGB 888 */
476 var->bits_per_pixel = 32;
477 var->red.offset = 16;
478 var->red.length = 8;
479 var->green.offset = 8;
480 var->green.length = 8;
481 var->blue.offset = 0;
482 var->blue.length = 8;
483 var->transp.offset = 24;
484 var->transp.length = 8;
485 break;
486 }
487 var->red.msb_right = var->green.msb_right = var->blue.msb_right =
488 var->transp.msb_right = 0;
489 var->grayscale = 0;
490 var->nonstd = 0;
491 var->activate = 0;
492 var->height = var->width = -1;
493 var->pixclock = 10000;
494 var->left_margin = var->right_margin = 16;
495 var->upper_margin = var->lower_margin = 16;
496 var->hsync_len = var->vsync_len = 8;
497 var->sync = 0;
498 var->vmode = FB_VMODE_NONINTERLACED;
499
500 /* set offb aperture size for generic probing */
501 info->apertures = alloc_apertures(1);
502 if (!info->apertures)
503 goto out_aper;
504 info->apertures->ranges[0].base = address;
505 info->apertures->ranges[0].size = fix->smem_len;
506
507 info->fbops = &offb_ops;
508 info->screen_base = ioremap(address, fix->smem_len);
509 info->pseudo_palette = (void *) (info + 1);
510 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian;
511
512 fb_alloc_cmap(&info->cmap, 256, 0);
513
514 if (register_framebuffer(info) < 0)
515 goto out_err;
516
517 fb_info(info, "Open Firmware frame buffer device on %pOF\n", dp);
518 return;
519
520 out_err:
521 iounmap(info->screen_base);
522 out_aper:
523 iounmap(par->cmap_adr);
524 par->cmap_adr = NULL;
525 framebuffer_release(info);
526 release_mem_region(res_start, res_size);
527 }
528
529
530 static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
531 {
532 unsigned int len;
533 int i, width = 640, height = 480, depth = 8, pitch = 640;
534 unsigned int flags, rsize, addr_prop = 0;
535 unsigned long max_size = 0;
536 u64 rstart, address = OF_BAD_ADDR;
537 const __be32 *pp, *addrp, *up;
538 u64 asize;
539 int foreign_endian = 0;
540
541 #ifdef __BIG_ENDIAN
542 if (of_get_property(dp, "little-endian", NULL))
543 foreign_endian = FBINFO_FOREIGN_ENDIAN;
544 #else
545 if (of_get_property(dp, "big-endian", NULL))
546 foreign_endian = FBINFO_FOREIGN_ENDIAN;
547 #endif
548
549 pp = of_get_property(dp, "linux,bootx-depth", &len);
550 if (pp == NULL)
551 pp = of_get_property(dp, "depth", &len);
552 if (pp && len == sizeof(u32))
553 depth = be32_to_cpup(pp);
554
555 pp = of_get_property(dp, "linux,bootx-width", &len);
556 if (pp == NULL)
557 pp = of_get_property(dp, "width", &len);
558 if (pp && len == sizeof(u32))
559 width = be32_to_cpup(pp);
560
561 pp = of_get_property(dp, "linux,bootx-height", &len);
562 if (pp == NULL)
563 pp = of_get_property(dp, "height", &len);
564 if (pp && len == sizeof(u32))
565 height = be32_to_cpup(pp);
566
567 pp = of_get_property(dp, "linux,bootx-linebytes", &len);
568 if (pp == NULL)
569 pp = of_get_property(dp, "linebytes", &len);
570 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu))
571 pitch = be32_to_cpup(pp);
572 else
573 pitch = width * ((depth + 7) / 8);
574
575 rsize = (unsigned long)pitch * (unsigned long)height;
576
577 /* Ok, now we try to figure out the address of the framebuffer.
578 *
579 * Unfortunately, Open Firmware doesn't provide a standard way to do
580 * so. All we can do is a dodgy heuristic that happens to work in
581 * practice. On most machines, the "address" property contains what
582 * we need, though not on Matrox cards found in IBM machines. What I've
583 * found that appears to give good results is to go through the PCI
584 * ranges and pick one that is both big enough and if possible encloses
585 * the "address" property. If none match, we pick the biggest
586 */
587 up = of_get_property(dp, "linux,bootx-addr", &len);
588 if (up == NULL)
589 up = of_get_property(dp, "address", &len);
590 if (up && len == sizeof(u32))
591 addr_prop = *up;
592
593 /* Hack for when BootX is passing us */
594 if (no_real_node)
595 goto skip_addr;
596
597 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
598 != NULL; i++) {
599 int match_addrp = 0;
600
601 if (!(flags & IORESOURCE_MEM))
602 continue;
603 if (asize < rsize)
604 continue;
605 rstart = of_translate_address(dp, addrp);
606 if (rstart == OF_BAD_ADDR)
607 continue;
608 if (addr_prop && (rstart <= addr_prop) &&
609 ((rstart + asize) >= (addr_prop + rsize)))
610 match_addrp = 1;
611 if (match_addrp) {
612 address = addr_prop;
613 break;
614 }
615 if (rsize > max_size) {
616 max_size = rsize;
617 address = OF_BAD_ADDR;
618 }
619
620 if (address == OF_BAD_ADDR)
621 address = rstart;
622 }
623 skip_addr:
624 if (address == OF_BAD_ADDR && addr_prop)
625 address = (u64)addr_prop;
626 if (address != OF_BAD_ADDR) {
627 #ifdef CONFIG_PCI
628 const __be32 *vidp, *didp;
629 u32 vid, did;
630 struct pci_dev *pdev;
631
632 vidp = of_get_property(dp, "vendor-id", NULL);
633 didp = of_get_property(dp, "device-id", NULL);
634 if (vidp && didp) {
635 vid = be32_to_cpup(vidp);
636 did = be32_to_cpup(didp);
637 pdev = pci_get_device(vid, did, NULL);
638 if (!pdev || pci_enable_device(pdev))
639 return;
640 }
641 #endif
642 /* kludge for valkyrie */
643 if (strcmp(dp->name, "valkyrie") == 0)
644 address += 0x1000;
645 offb_init_fb(no_real_node ? "bootx" : dp->name,
646 width, height, depth, pitch, address,
647 foreign_endian, no_real_node ? NULL : dp);
648 }
649 }
650
651 static int __init offb_init(void)
652 {
653 struct device_node *dp = NULL, *boot_disp = NULL;
654
655 if (fb_get_options("offb", NULL))
656 return -ENODEV;
657
658 /* Check if we have a MacOS display without a node spec */
659 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
660 /* The old code tried to work out which node was the MacOS
661 * display based on the address. I'm dropping that since the
662 * lack of a node spec only happens with old BootX versions
663 * (users can update) and with this code, they'll still get
664 * a display (just not the palette hacks).
665 */
666 offb_init_nodriver(of_chosen, 1);
667 }
668
669 for_each_node_by_type(dp, "display") {
670 if (of_get_property(dp, "linux,opened", NULL) &&
671 of_get_property(dp, "linux,boot-display", NULL)) {
672 boot_disp = dp;
673 offb_init_nodriver(dp, 0);
674 }
675 }
676 for_each_node_by_type(dp, "display") {
677 if (of_get_property(dp, "linux,opened", NULL) &&
678 dp != boot_disp)
679 offb_init_nodriver(dp, 0);
680 }
681
682 return 0;
683 }
684
685
686 module_init(offb_init);
687 MODULE_LICENSE("GPL");
Ubuntu Focal Linux kernel mirror