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efifb: Support overriding fields FW tells us with the DMI data.
[deliverable/linux.git] / drivers / video / efifb.c
CommitLineData
7c83172b
HY		 1/*
2 * Framebuffer driver for EFI/UEFI based system
3 *
4 * (c) 2006 Edgar Hucek <gimli@dark-green.com>
5 * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
6 *
7 */
8
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>
7c08c9ae 15#include <linux/dmi.h>
85a00d9b 16#include <linux/pci.h>
7c83172b
HY		 17#include <video/vga.h>
18
ec81c9cc 19static struct fb_var_screeninfo efifb_defined __devinitdata = {
7c83172b
HY		 20 .activate = FB_ACTIVATE_NOW,
21 .height = -1,
22 .width = -1,
23 .right_margin = 32,
24 .upper_margin = 16,
25 .lower_margin = 4,
26 .vsync_len = 4,
27 .vmode = FB_VMODE_NONINTERLACED,
28};
29
ec81c9cc 30static struct fb_fix_screeninfo efifb_fix __devinitdata = {
7c83172b
HY		 31 .id = "EFI VGA",
32 .type = FB_TYPE_PACKED_PIXELS,
33 .accel = FB_ACCEL_NONE,
34 .visual = FB_VISUAL_TRUECOLOR,
35};
36
7c08c9ae
PJ		 37enum {
38 M_I17, /* 17-Inch iMac */
39 M_I20, /* 20-Inch iMac */
40 M_I20_SR, /* 20-Inch iMac (Santa Rosa) */
41 M_I24, /* 24-Inch iMac */
a5757c2a
LM		 42 M_I24_8_1, /* 24-Inch iMac, 8,1th gen */
43 M_I24_10_1, /* 24-Inch iMac, 10,1th gen */
44 M_I27_11_1, /* 27-Inch iMac, 11,1th gen */
7c08c9ae 45 M_MINI, /* Mac Mini */
a5757c2a
LM		 46 M_MINI_3_1, /* Mac Mini, 3,1th gen */
47 M_MINI_4_1, /* Mac Mini, 4,1th gen */
7c08c9ae
PJ		 48 M_MB, /* MacBook */
49 M_MB_2, /* MacBook, 2nd rev. */
50 M_MB_3, /* MacBook, 3rd rev. */
a5757c2a
LM		 51 M_MB_5_1, /* MacBook, 5th rev. */
52 M_MB_6_1, /* MacBook, 6th rev. */
53 M_MB_7_1, /* MacBook, 7th rev. */
7c08c9ae
PJ		 54 M_MB_SR, /* MacBook, 2nd gen, (Santa Rosa) */
55 M_MBA, /* MacBook Air */
56 M_MBP, /* MacBook Pro */
57 M_MBP_2, /* MacBook Pro 2nd gen */
a5757c2a 58 M_MBP_2_2, /* MacBook Pro 2,2nd gen */
7c08c9ae
PJ		 59 M_MBP_SR, /* MacBook Pro (Santa Rosa) */
60 M_MBP_4, /* MacBook Pro, 4th gen */
8a3bdfe6 61 M_MBP_5_1, /* MacBook Pro, 5,1th gen */
a5757c2a
LM		 62 M_MBP_5_2, /* MacBook Pro, 5,2th gen */
63 M_MBP_5_3, /* MacBook Pro, 5,3rd gen */
64 M_MBP_6_1, /* MacBook Pro, 6,1th gen */
65 M_MBP_6_2, /* MacBook Pro, 6,2th gen */
66 M_MBP_7_1, /* MacBook Pro, 7,1th gen */
e9c5db0b 67 M_MBP_8_2, /* MacBook Pro, 8,2nd gen */
7c08c9ae
PJ		 68 M_UNKNOWN /* placeholder */
69};
70
47dfe51f
PJ		 71#define OVERRIDE_NONE 0x0
72#define OVERRIDE_BASE 0x1
73#define OVERRIDE_STRIDE 0x2
74#define OVERRIDE_HEIGHT 0x4
75#define OVERRIDE_WIDTH 0x8
76
7c08c9ae
PJ		 77static struct efifb_dmi_info {
78 char *optname;
79 unsigned long base;
80 int stride;
81 int width;
82 int height;
47dfe51f 83 int flags;
ec81c9cc 84} dmi_list[] __initdata = {
47dfe51f
PJ		 85 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
86 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
87 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
88 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
89 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
90 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
91 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
92 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
93 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
94 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
95 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
96 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
97 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
98 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
99 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
100 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
101 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
102 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
103 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
104 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
105 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
106 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
107 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
108 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
109 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
110 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
111 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
112 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
7c08c9ae
PJ		 113};
114
115static int set_system(const struct dmi_system_id *id);
116
117#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
118 { set_system, name, { \
119 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
120 DMI_MATCH(DMI_PRODUCT_NAME, name) }, \
121 &dmi_list[enumid] }
122
ec81c9cc 123static const struct dmi_system_id dmi_system_table[] __initconst = {
7c08c9ae
PJ		 124 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
125 /* At least one of these two will be right; maybe both? */
126 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
127 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
128 /* At least one of these two will be right; maybe both? */
129 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
130 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
131 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
a5757c2a
LM		 132 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
133 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
134 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
7c08c9ae 135 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
a5757c2a
LM		 136 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
137 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
7c08c9ae
PJ		 138 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
139 /* At least one of these two will be right; maybe both? */
140 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
141 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
142 /* At least one of these two will be right; maybe both? */
143 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
144 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
145 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
a5757c2a
LM		 146 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
147 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
148 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
7c08c9ae
PJ		 149 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
150 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
151 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
a5757c2a 152 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
7c08c9ae
PJ		 153 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
154 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
155 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
156 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
8a3bdfe6 157 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
a5757c2a
LM		 158 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
159 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
160 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
161 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
162 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
e9c5db0b 163 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
7c08c9ae
PJ		 164 {},
165};
166
47dfe51f
PJ		 167#define choose_value(dmivalue, fwvalue, field, flags) ({ \
168 typeof(fwvalue) _ret_ = fwvalue; \
169 if ((flags) & (field)) \
170 _ret_ = dmivalue; \
171 else if ((fwvalue) == 0) \
172 _ret_ = dmivalue; \
173 _ret_; \
174 })
175
7c08c9ae
PJ		 176static int set_system(const struct dmi_system_id *id)
177{
178 struct efifb_dmi_info *info = id->driver_data;
7c08c9ae 179
47dfe51f
PJ		 180 if (info->base == 0 && info->height == 0 && info->width == 0
181 && info->stride == 0)
182 return 0;
7c08c9ae
PJ		 183
184 /* Trust the bootloader over the DMI tables */
85a00d9b
PJ		 185 if (screen_info.lfb_base == 0) {
186#if defined(CONFIG_PCI)
187 struct pci_dev *dev = NULL;
188 int found_bar = 0;
189#endif
47dfe51f
PJ		 190 if (info->base) {
191 screen_info.lfb_base = choose_value(info->base,
192 screen_info.lfb_base, OVERRIDE_BASE,
193 info->flags);
7c08c9ae 194
85a00d9b 195#if defined(CONFIG_PCI)
47dfe51f
PJ		 196 /* make sure that the address in the table is actually
197 * on a VGA device's PCI BAR */
198
199 for_each_pci_dev(dev) {
200 int i;
201 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
202 continue;
203 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
204 resource_size_t start, end;
205
206 start = pci_resource_start(dev, i);
207 if (start == 0)
208 break;
209 end = pci_resource_end(dev, i);
210 if (screen_info.lfb_base >= start &&
211 screen_info.lfb_base < end) {
212 found_bar = 1;
213 }
85a00d9b
PJ		 214 }
215 }
47dfe51f
PJ		 216 if (!found_bar)
217 screen_info.lfb_base = 0;
85a00d9b 218#endif
47dfe51f 219 }
85a00d9b
PJ		 220 }
221 if (screen_info.lfb_base) {
47dfe51f
PJ		 222 screen_info.lfb_linelength = choose_value(info->stride,
223 screen_info.lfb_linelength, OVERRIDE_STRIDE,
224 info->flags);
225 screen_info.lfb_width = choose_value(info->width,
226 screen_info.lfb_width, OVERRIDE_WIDTH,
227 info->flags);
228 screen_info.lfb_height = choose_value(info->height,
229 screen_info.lfb_height, OVERRIDE_HEIGHT,
230 info->flags);
85a00d9b
PJ		 231 if (screen_info.orig_video_isVGA == 0)
232 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
233 } else {
234 screen_info.lfb_linelength = 0;
235 screen_info.lfb_width = 0;
236 screen_info.lfb_height = 0;
237 screen_info.orig_video_isVGA = 0;
238 return 0;
239 }
47dfe51f
PJ		 240
241 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p "
242 "(%dx%d, stride %d)\n", id->ident,
243 (void *)screen_info.lfb_base, screen_info.lfb_width,
244 screen_info.lfb_height, screen_info.lfb_linelength);
245
246
85a00d9b 247 return 1;
7c08c9ae
PJ		 248}
249
7c83172b
HY		 250static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
251 unsigned blue, unsigned transp,
252 struct fb_info *info)
253{
254 /*
255 * Set a single color register. The values supplied are
256 * already rounded down to the hardware's capabilities
257 * (according to the entries in the `var' structure). Return
258 * != 0 for invalid regno.
259 */
260
261 if (regno >= info->cmap.len)
262 return 1;
263
264 if (regno < 16) {
265 red >>= 8;
266 green >>= 8;
267 blue >>= 8;
268 ((u32 *)(info->pseudo_palette))[regno] =
269 (red << info->var.red.offset) |
270 (green << info->var.green.offset) |
271 (blue << info->var.blue.offset);
272 }
273 return 0;
274}
275
89f3f219
MS		 276static void efifb_destroy(struct fb_info *info)
277{
278 if (info->screen_base)
279 iounmap(info->screen_base);
1471ca9a 280 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
89f3f219
MS		 281 framebuffer_release(info);
282}
283
7c83172b
HY		 284static struct fb_ops efifb_ops = {
285 .owner = THIS_MODULE,
89f3f219 286 .fb_destroy = efifb_destroy,
7c83172b
HY		 287 .fb_setcolreg = efifb_setcolreg,
288 .fb_fillrect = cfb_fillrect,
289 .fb_copyarea = cfb_copyarea,
290 .fb_imageblit = cfb_imageblit,
291};
292
7c08c9ae
PJ		 293static int __init efifb_setup(char *options)
294{
295 char *this_opt;
296 int i;
297
298 if (!options || !*options)
299 return 0;
300
301 while ((this_opt = strsep(&options, ",")) != NULL) {
302 if (!*this_opt) continue;
303
304 for (i = 0; i < M_UNKNOWN; i++) {
305 if (!strcmp(this_opt, dmi_list[i].optname) &&
306 dmi_list[i].base != 0) {
307 screen_info.lfb_base = dmi_list[i].base;
308 screen_info.lfb_linelength = dmi_list[i].stride;
309 screen_info.lfb_width = dmi_list[i].width;
310 screen_info.lfb_height = dmi_list[i].height;
311 }
312 }
313 if (!strncmp(this_opt, "base:", 5))
314 screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
315 else if (!strncmp(this_opt, "stride:", 7))
316 screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
317 else if (!strncmp(this_opt, "height:", 7))
318 screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
319 else if (!strncmp(this_opt, "width:", 6))
320 screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
321 }
322 return 0;
323}
324
c2e13037 325static int __devinit efifb_probe(struct platform_device *dev)
7c83172b
HY		 326{
327 struct fb_info *info;
328 int err;
329 unsigned int size_vmode;
330 unsigned int size_remap;
331 unsigned int size_total;
7c08c9ae
PJ		 332 int request_succeeded = 0;
333
7c08c9ae
PJ		 334 if (!screen_info.lfb_depth)
335 screen_info.lfb_depth = 32;
336 if (!screen_info.pages)
337 screen_info.pages = 1;
133bb070
MG		 338 if (!screen_info.lfb_base) {
339 printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
340 return -ENODEV;
341 }
342 printk(KERN_INFO "efifb: probing for efifb\n");
7c08c9ae
PJ		 343
344 /* just assume they're all unset if any are */
345 if (!screen_info.blue_size) {
346 screen_info.blue_size = 8;
347 screen_info.blue_pos = 0;
348 screen_info.green_size = 8;
349 screen_info.green_pos = 8;
350 screen_info.red_size = 8;
351 screen_info.red_pos = 16;
352 screen_info.rsvd_size = 8;
353 screen_info.rsvd_pos = 24;
354 }
7c83172b
HY		 355
356 efifb_fix.smem_start = screen_info.lfb_base;
357 efifb_defined.bits_per_pixel = screen_info.lfb_depth;
358 efifb_defined.xres = screen_info.lfb_width;
359 efifb_defined.yres = screen_info.lfb_height;
360 efifb_fix.line_length = screen_info.lfb_linelength;
361
362 /* size_vmode -- that is the amount of memory needed for the
363 * used video mode, i.e. the minimum amount of
364 * memory we need. */
365 size_vmode = efifb_defined.yres * efifb_fix.line_length;
366
367 /* size_total -- all video memory we have. Used for
368 * entries, ressource allocation and bounds
369 * checking. */
370 size_total = screen_info.lfb_size;
371 if (size_total < size_vmode)
372 size_total = size_vmode;
373
374 /* size_remap -- the amount of video memory we are going to
375 * use for efifb. With modern cards it is no
376 * option to simply use size_total as that
377 * wastes plenty of kernel address space. */
378 size_remap = size_vmode * 2;
7c83172b
HY		 379 if (size_remap > size_total)
380 size_remap = size_total;
7c08c9ae
PJ		 381 if (size_remap % PAGE_SIZE)
382 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
7c83172b
HY		 383 efifb_fix.smem_len = size_remap;
384
7c08c9ae
PJ		 385 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
386 request_succeeded = 1;
387 } else {
7c83172b
HY		 388 /* We cannot make this fatal. Sometimes this comes from magic
389 spaces our resource handlers simply don't know about */
390 printk(KERN_WARNING
391 "efifb: cannot reserve video memory at 0x%lx\n",
392 efifb_fix.smem_start);
7c08c9ae 393 }
7c83172b
HY		 394
395 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
396 if (!info) {
7c08c9ae 397 printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
7c83172b
HY		 398 err = -ENOMEM;
399 goto err_release_mem;
400 }
401 info->pseudo_palette = info->par;
402 info->par = NULL;
403
1471ca9a
MS		 404 info->apertures = alloc_apertures(1);
405 if (!info->apertures) {
406 err = -ENOMEM;
407 goto err_release_fb;
408 }
409 info->apertures->ranges[0].base = efifb_fix.smem_start;
410 info->apertures->ranges[0].size = size_remap;
4410f391 411
7c83172b
HY		 412 info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len);
413 if (!info->screen_base) {
414 printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
415 "0x%x @ 0x%lx\n",
416 efifb_fix.smem_len, efifb_fix.smem_start);
417 err = -EIO;
7c08c9ae 418 goto err_release_fb;
7c83172b
HY		 419 }
420
421 printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
422 "using %dk, total %dk\n",
423 efifb_fix.smem_start, info->screen_base,
424 size_remap/1024, size_total/1024);
425 printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
426 efifb_defined.xres, efifb_defined.yres,
427 efifb_defined.bits_per_pixel, efifb_fix.line_length,
428 screen_info.pages);
429
430 efifb_defined.xres_virtual = efifb_defined.xres;
431 efifb_defined.yres_virtual = efifb_fix.smem_len /
432 efifb_fix.line_length;
433 printk(KERN_INFO "efifb: scrolling: redraw\n");
434 efifb_defined.yres_virtual = efifb_defined.yres;
435
436 /* some dummy values for timing to make fbset happy */
437 efifb_defined.pixclock = 10000000 / efifb_defined.xres *
438 1000 / efifb_defined.yres;
439 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
440 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
441
442 efifb_defined.red.offset = screen_info.red_pos;
443 efifb_defined.red.length = screen_info.red_size;
444 efifb_defined.green.offset = screen_info.green_pos;
445 efifb_defined.green.length = screen_info.green_size;
446 efifb_defined.blue.offset = screen_info.blue_pos;
447 efifb_defined.blue.length = screen_info.blue_size;
448 efifb_defined.transp.offset = screen_info.rsvd_pos;
449 efifb_defined.transp.length = screen_info.rsvd_size;
450
451 printk(KERN_INFO "efifb: %s: "
452 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
453 "Truecolor",
454 screen_info.rsvd_size,
455 screen_info.red_size,
456 screen_info.green_size,
457 screen_info.blue_size,
458 screen_info.rsvd_pos,
459 screen_info.red_pos,
460 screen_info.green_pos,
461 screen_info.blue_pos);
462
463 efifb_fix.ypanstep = 0;
464 efifb_fix.ywrapstep = 0;
465
466 info->fbops = &efifb_ops;
467 info->var = efifb_defined;
468 info->fix = efifb_fix;
4410f391 469 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;
7c83172b 470
7c08c9ae
PJ		 471 if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
472 printk(KERN_ERR "efifb: cannot allocate colormap\n");
7c83172b
HY		 473 goto err_unmap;
474 }
7c08c9ae
PJ		 475 if ((err = register_framebuffer(info)) < 0) {
476 printk(KERN_ERR "efifb: cannot register framebuffer\n");
7c83172b
HY		 477 goto err_fb_dealoc;
478 }
479 printk(KERN_INFO "fb%d: %s frame buffer device\n",
7c08c9ae 480 info->node, info->fix.id);
7c83172b
HY		 481 return 0;
482
483err_fb_dealoc:
484 fb_dealloc_cmap(&info->cmap);
485err_unmap:
486 iounmap(info->screen_base);
7c08c9ae 487err_release_fb:
7c83172b
HY		 488 framebuffer_release(info);
489err_release_mem:
7c08c9ae
PJ		 490 if (request_succeeded)
491 release_mem_region(efifb_fix.smem_start, size_total);
7c83172b
HY		 492 return err;
493}
494
495static struct platform_driver efifb_driver = {
496 .probe = efifb_probe,
497 .driver = {
498 .name = "efifb",
499 },
500};
501
502static struct platform_device efifb_device = {
503 .name = "efifb",
504};
505
506static int __init efifb_init(void)
507{
508 int ret;
7c08c9ae 509 char *option = NULL;
7c83172b 510
e14a685d
BM		 511 dmi_check_system(dmi_system_table);
512
7c83172b
HY		 513 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
514 return -ENODEV;
7c08c9ae
PJ		 515
516 if (fb_get_options("efifb", &option))
517 return -ENODEV;
518 efifb_setup(option);
519
520 /* We don't get linelength from UGA Draw Protocol, only from
521 * EFI Graphics Protocol. So if it's not in DMI, and it's not
522 * passed in from the user, we really can't use the framebuffer.
523 */
524 if (!screen_info.lfb_linelength)
525 return -ENODEV;
7c83172b
HY		 526
527 ret = platform_driver_register(&efifb_driver);
528
529 if (!ret) {
530 ret = platform_device_register(&efifb_device);
531 if (ret)
532 platform_driver_unregister(&efifb_driver);
533 }
534 return ret;
535}
536module_init(efifb_init);
537
538MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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