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9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/fb.h>
13#include <linux/platform_device.h>
14#include <linux/screen_info.h>
15#include <linux/dmi.h>
16#include <linux/pci.h>
17#include <video/vga.h>
18
19static bool request_mem_succeeded = false;
20
21static struct pci_dev *default_vga;
22
23static struct fb_var_screeninfo efifb_defined = {
24 .activate = FB_ACTIVATE_NOW,
25 .height = -1,
26 .width = -1,
27 .right_margin = 32,
28 .upper_margin = 16,
29 .lower_margin = 4,
30 .vsync_len = 4,
31 .vmode = FB_VMODE_NONINTERLACED,
32};
33
34static struct fb_fix_screeninfo efifb_fix = {
35 .id = "EFI VGA",
36 .type = FB_TYPE_PACKED_PIXELS,
37 .accel = FB_ACCEL_NONE,
38 .visual = FB_VISUAL_TRUECOLOR,
39};
40
41enum {
42 M_I17,
43 M_I20,
44 M_I20_SR,
45 M_I24,
46 M_I24_8_1,
47 M_I24_10_1,
48 M_I27_11_1,
49 M_MINI,
50 M_MINI_3_1,
51 M_MINI_4_1,
52 M_MB,
53 M_MB_2,
54 M_MB_3,
55 M_MB_5_1,
56 M_MB_6_1,
57 M_MB_7_1,
58 M_MB_SR,
59 M_MBA,
60 M_MBA_3,
61 M_MBP,
62 M_MBP_2,
63 M_MBP_2_2,
64 M_MBP_SR,
65 M_MBP_4,
66 M_MBP_5_1,
67 M_MBP_5_2,
68 M_MBP_5_3,
69 M_MBP_6_1,
70 M_MBP_6_2,
71 M_MBP_7_1,
72 M_MBP_8_2,
73 M_UNKNOWN
74};
75
76#define OVERRIDE_NONE 0x0
77#define OVERRIDE_BASE 0x1
78#define OVERRIDE_STRIDE 0x2
79#define OVERRIDE_HEIGHT 0x4
80#define OVERRIDE_WIDTH 0x8
81
82static struct efifb_dmi_info {
83 char *optname;
84 unsigned long base;
85 int stride;
86 int width;
87 int height;
88 int flags;
89} dmi_list[] __initdata = {
90 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
91 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
92 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
93 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
94 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
95 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
96 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
97 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
98 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
99 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
100 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
101 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
102 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
103 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
104 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
105
106 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
107 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
108 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE },
109 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
110 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
111 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
112 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
113 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
114 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
115 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
116 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
117 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
118 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
119 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
120};
121
122static int set_system(const struct dmi_system_id *id);
123
124#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
125 { set_system, name, { \
126 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
127 DMI_MATCH(DMI_PRODUCT_NAME, name) }, \
128 &dmi_list[enumid] }
129
130static const struct dmi_system_id dmi_system_table[] __initconst = {
131 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
132
133 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
134 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
135
136 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
137 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
138 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
139 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
140 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
141 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
142 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
143 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
144 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
145 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
146
147 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
148 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
149
150 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
151 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
152 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
153 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
154 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
155 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
156 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
157 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
158 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
159 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
160 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
161 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
162 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
163 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
164 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
165 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
166 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
167 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
168 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
169 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
170 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
171 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
172 {},
173};
174
175#define choose_value(dmivalue, fwvalue, field, flags) ({ \
176 typeof(fwvalue) _ret_ = fwvalue; \
177 if ((flags) & (field)) \
178 _ret_ = dmivalue; \
179 else if ((fwvalue) == 0) \
180 _ret_ = dmivalue; \
181 _ret_; \
182 })
183
184static int set_system(const struct dmi_system_id *id)
185{
186 struct efifb_dmi_info *info = id->driver_data;
187
188 if (info->base == 0 && info->height == 0 && info->width == 0
189 && info->stride == 0)
190 return 0;
191
192
193 if (screen_info.lfb_base == 0) {
194#if defined(CONFIG_PCI)
195 struct pci_dev *dev = NULL;
196 int found_bar = 0;
197#endif
198 if (info->base) {
199 screen_info.lfb_base = choose_value(info->base,
200 screen_info.lfb_base, OVERRIDE_BASE,
201 info->flags);
202
203#if defined(CONFIG_PCI)
204
205
206
207 for_each_pci_dev(dev) {
208 int i;
209 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
210 continue;
211 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
212 resource_size_t start, end;
213
214 start = pci_resource_start(dev, i);
215 if (start == 0)
216 break;
217 end = pci_resource_end(dev, i);
218 if (screen_info.lfb_base >= start &&
219 screen_info.lfb_base < end) {
220 found_bar = 1;
221 }
222 }
223 }
224 if (!found_bar)
225 screen_info.lfb_base = 0;
226#endif
227 }
228 }
229 if (screen_info.lfb_base) {
230 screen_info.lfb_linelength = choose_value(info->stride,
231 screen_info.lfb_linelength, OVERRIDE_STRIDE,
232 info->flags);
233 screen_info.lfb_width = choose_value(info->width,
234 screen_info.lfb_width, OVERRIDE_WIDTH,
235 info->flags);
236 screen_info.lfb_height = choose_value(info->height,
237 screen_info.lfb_height, OVERRIDE_HEIGHT,
238 info->flags);
239 if (screen_info.orig_video_isVGA == 0)
240 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
241 } else {
242 screen_info.lfb_linelength = 0;
243 screen_info.lfb_width = 0;
244 screen_info.lfb_height = 0;
245 screen_info.orig_video_isVGA = 0;
246 return 0;
247 }
248
249 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
250 "(%dx%d, stride %d)\n", id->ident,
251 screen_info.lfb_base, screen_info.lfb_width,
252 screen_info.lfb_height, screen_info.lfb_linelength);
253
254
255 return 1;
256}
257
258static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
259 unsigned blue, unsigned transp,
260 struct fb_info *info)
261{
262
263
264
265
266
267
268
269 if (regno >= info->cmap.len)
270 return 1;
271
272 if (regno < 16) {
273 red >>= 8;
274 green >>= 8;
275 blue >>= 8;
276 ((u32 *)(info->pseudo_palette))[regno] =
277 (red << info->var.red.offset) |
278 (green << info->var.green.offset) |
279 (blue << info->var.blue.offset);
280 }
281 return 0;
282}
283
284static void efifb_destroy(struct fb_info *info)
285{
286 if (info->screen_base)
287 iounmap(info->screen_base);
288 if (request_mem_succeeded)
289 release_mem_region(info->apertures->ranges[0].base,
290 info->apertures->ranges[0].size);
291 fb_dealloc_cmap(&info->cmap);
292 framebuffer_release(info);
293}
294
295static struct fb_ops efifb_ops = {
296 .owner = THIS_MODULE,
297 .fb_destroy = efifb_destroy,
298 .fb_setcolreg = efifb_setcolreg,
299 .fb_fillrect = cfb_fillrect,
300 .fb_copyarea = cfb_copyarea,
301 .fb_imageblit = cfb_imageblit,
302};
303
304struct pci_dev *vga_default_device(void)
305{
306 return default_vga;
307}
308
309EXPORT_SYMBOL_GPL(vga_default_device);
310
311void vga_set_default_device(struct pci_dev *pdev)
312{
313 default_vga = pdev;
314}
315
316static int __init efifb_setup(char *options)
317{
318 char *this_opt;
319 int i;
320 struct pci_dev *dev = NULL;
321
322 if (options && *options) {
323 while ((this_opt = strsep(&options, ",")) != NULL) {
324 if (!*this_opt) continue;
325
326 for (i = 0; i < M_UNKNOWN; i++) {
327 if (dmi_list[i].base != 0 &&
328 !strcmp(this_opt, dmi_list[i].optname)) {
329 screen_info.lfb_base = dmi_list[i].base;
330 screen_info.lfb_linelength = dmi_list[i].stride;
331 screen_info.lfb_width = dmi_list[i].width;
332 screen_info.lfb_height = dmi_list[i].height;
333 }
334 }
335 if (!strncmp(this_opt, "base:", 5))
336 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
337 else if (!strncmp(this_opt, "stride:", 7))
338 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
339 else if (!strncmp(this_opt, "height:", 7))
340 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
341 else if (!strncmp(this_opt, "width:", 6))
342 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
343 }
344 }
345
346 for_each_pci_dev(dev) {
347 int i;
348
349 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
350 continue;
351
352 for (i=0; i < DEVICE_COUNT_RESOURCE; i++) {
353 resource_size_t start, end;
354
355 if (!(pci_resource_flags(dev, i) & IORESOURCE_MEM))
356 continue;
357
358 start = pci_resource_start(dev, i);
359 end = pci_resource_end(dev, i);
360
361 if (!start || !end)
362 continue;
363
364 if (screen_info.lfb_base >= start &&
365 (screen_info.lfb_base + screen_info.lfb_size) < end)
366 default_vga = dev;
367 }
368 }
369
370 return 0;
371}
372
373static inline bool fb_base_is_valid(void)
374{
375 if (screen_info.lfb_base)
376 return true;
377
378 if (!(screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE))
379 return false;
380
381 if (screen_info.ext_lfb_base)
382 return true;
383
384 return false;
385}
386
387static int __init efifb_probe(struct platform_device *dev)
388{
389 struct fb_info *info;
390 int err;
391 unsigned int size_vmode;
392 unsigned int size_remap;
393 unsigned int size_total;
394
395 if (!screen_info.lfb_depth)
396 screen_info.lfb_depth = 32;
397 if (!screen_info.pages)
398 screen_info.pages = 1;
399 if (!fb_base_is_valid()) {
400 printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
401 return -ENODEV;
402 }
403 printk(KERN_INFO "efifb: probing for efifb\n");
404
405
406 if (!screen_info.blue_size) {
407 screen_info.blue_size = 8;
408 screen_info.blue_pos = 0;
409 screen_info.green_size = 8;
410 screen_info.green_pos = 8;
411 screen_info.red_size = 8;
412 screen_info.red_pos = 16;
413 screen_info.rsvd_size = 8;
414 screen_info.rsvd_pos = 24;
415 }
416
417 efifb_fix.smem_start = screen_info.lfb_base;
418
419 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) {
420 u64 ext_lfb_base;
421
422 ext_lfb_base = (u64)(unsigned long)screen_info.ext_lfb_base << 32;
423 efifb_fix.smem_start |= ext_lfb_base;
424 }
425
426 efifb_defined.bits_per_pixel = screen_info.lfb_depth;
427 efifb_defined.xres = screen_info.lfb_width;
428 efifb_defined.yres = screen_info.lfb_height;
429 efifb_fix.line_length = screen_info.lfb_linelength;
430
431
432
433
434 size_vmode = efifb_defined.yres * efifb_fix.line_length;
435
436
437
438
439 size_total = screen_info.lfb_size;
440 if (size_total < size_vmode)
441 size_total = size_vmode;
442
443
444
445
446
447 size_remap = size_vmode * 2;
448 if (size_remap > size_total)
449 size_remap = size_total;
450 if (size_remap % PAGE_SIZE)
451 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
452 efifb_fix.smem_len = size_remap;
453
454 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
455 request_mem_succeeded = true;
456 } else {
457
458
459 printk(KERN_WARNING
460 "efifb: cannot reserve video memory at 0x%lx\n",
461 efifb_fix.smem_start);
462 }
463
464 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
465 if (!info) {
466 printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
467 err = -ENOMEM;
468 goto err_release_mem;
469 }
470 info->pseudo_palette = info->par;
471 info->par = NULL;
472
473 info->apertures = alloc_apertures(1);
474 if (!info->apertures) {
475 err = -ENOMEM;
476 goto err_release_fb;
477 }
478 info->apertures->ranges[0].base = efifb_fix.smem_start;
479 info->apertures->ranges[0].size = size_remap;
480
481 info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len);
482 if (!info->screen_base) {
483 printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
484 "0x%x @ 0x%lx\n",
485 efifb_fix.smem_len, efifb_fix.smem_start);
486 err = -EIO;
487 goto err_release_fb;
488 }
489
490 printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
491 "using %dk, total %dk\n",
492 efifb_fix.smem_start, info->screen_base,
493 size_remap/1024, size_total/1024);
494 printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
495 efifb_defined.xres, efifb_defined.yres,
496 efifb_defined.bits_per_pixel, efifb_fix.line_length,
497 screen_info.pages);
498
499 efifb_defined.xres_virtual = efifb_defined.xres;
500 efifb_defined.yres_virtual = efifb_fix.smem_len /
501 efifb_fix.line_length;
502 printk(KERN_INFO "efifb: scrolling: redraw\n");
503 efifb_defined.yres_virtual = efifb_defined.yres;
504
505
506 efifb_defined.pixclock = 10000000 / efifb_defined.xres *
507 1000 / efifb_defined.yres;
508 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
509 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
510
511 efifb_defined.red.offset = screen_info.red_pos;
512 efifb_defined.red.length = screen_info.red_size;
513 efifb_defined.green.offset = screen_info.green_pos;
514 efifb_defined.green.length = screen_info.green_size;
515 efifb_defined.blue.offset = screen_info.blue_pos;
516 efifb_defined.blue.length = screen_info.blue_size;
517 efifb_defined.transp.offset = screen_info.rsvd_pos;
518 efifb_defined.transp.length = screen_info.rsvd_size;
519
520 printk(KERN_INFO "efifb: %s: "
521 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
522 "Truecolor",
523 screen_info.rsvd_size,
524 screen_info.red_size,
525 screen_info.green_size,
526 screen_info.blue_size,
527 screen_info.rsvd_pos,
528 screen_info.red_pos,
529 screen_info.green_pos,
530 screen_info.blue_pos);
531
532 efifb_fix.ypanstep = 0;
533 efifb_fix.ywrapstep = 0;
534
535 info->fbops = &efifb_ops;
536 info->var = efifb_defined;
537 info->fix = efifb_fix;
538 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;
539
540 if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
541 printk(KERN_ERR "efifb: cannot allocate colormap\n");
542 goto err_unmap;
543 }
544 if ((err = register_framebuffer(info)) < 0) {
545 printk(KERN_ERR "efifb: cannot register framebuffer\n");
546 goto err_fb_dealoc;
547 }
548 printk(KERN_INFO "fb%d: %s frame buffer device\n",
549 info->node, info->fix.id);
550 return 0;
551
552err_fb_dealoc:
553 fb_dealloc_cmap(&info->cmap);
554err_unmap:
555 iounmap(info->screen_base);
556err_release_fb:
557 framebuffer_release(info);
558err_release_mem:
559 if (request_mem_succeeded)
560 release_mem_region(efifb_fix.smem_start, size_total);
561 return err;
562}
563
564static struct platform_driver efifb_driver = {
565 .driver = {
566 .name = "efifb",
567 },
568};
569
570static struct platform_device efifb_device = {
571 .name = "efifb",
572};
573
574static int __init efifb_init(void)
575{
576 int ret;
577 char *option = NULL;
578
579 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
580 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
581 dmi_check_system(dmi_system_table);
582
583 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
584 return -ENODEV;
585
586 if (fb_get_options("efifb", &option))
587 return -ENODEV;
588 efifb_setup(option);
589
590
591
592
593
594 if (!screen_info.lfb_linelength)
595 return -ENODEV;
596
597 ret = platform_device_register(&efifb_device);
598 if (ret)
599 return ret;
600
601
602
603
604
605
606 ret = platform_driver_probe(&efifb_driver, efifb_probe);
607 if (ret) {
608 platform_device_unregister(&efifb_device);
609 return ret;
610 }
611
612 return ret;
613}
614module_init(efifb_init);
615
616MODULE_LICENSE("GPL");
617
