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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> |
15 | #include <linux/dmi.h> |
16 | |
17 | #include <video/vga.h> |
18 | |
19 | static struct fb_var_screeninfo efifb_defined __initdata = { |
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 | |
30 | static struct fb_fix_screeninfo efifb_fix __initdata = { |
31 | .id = "EFI VGA", |
32 | .type = FB_TYPE_PACKED_PIXELS, |
33 | .accel = FB_ACCEL_NONE, |
34 | .visual = FB_VISUAL_TRUECOLOR, |
35 | }; |
36 | |
37 | enum { |
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 */ |
42 | M_MINI, /* Mac Mini */ |
43 | M_MB, /* MacBook */ |
44 | M_MB_2, /* MacBook, 2nd rev. */ |
45 | M_MB_3, /* MacBook, 3rd rev. */ |
46 | M_MB_SR, /* MacBook, 2nd gen, (Santa Rosa) */ |
47 | M_MBA, /* MacBook Air */ |
48 | M_MBP, /* MacBook Pro */ |
49 | M_MBP_2, /* MacBook Pro 2nd gen */ |
50 | M_MBP_SR, /* MacBook Pro (Santa Rosa) */ |
51 | M_MBP_4, /* MacBook Pro, 4th gen */ |
52 | M_UNKNOWN /* placeholder */ |
53 | }; |
54 | |
55 | static struct efifb_dmi_info { |
56 | char *optname; |
57 | unsigned long base; |
58 | int stride; |
59 | int width; |
60 | int height; |
61 | } dmi_list[] = { |
62 | [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900 }, |
63 | [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050 }, /* guess */ |
64 | [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050 }, |
65 | [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200 }, /* guess */ |
66 | [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768 }, |
67 | [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800 }, |
68 | [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800 }, |
69 | [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900 }, |
70 | [M_MBP_2] = { "mbp2", 0, 0, 0, 0 }, /* placeholder */ |
71 | [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900 }, |
72 | [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200 }, |
73 | [M_UNKNOWN] = { NULL, 0, 0, 0, 0 } |
74 | }; |
75 | |
76 | static int set_system(const struct dmi_system_id *id); |
77 | |
78 | #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \ |
79 | { set_system, name, { \ |
80 | DMI_MATCH(DMI_BIOS_VENDOR, vendor), \ |
81 | DMI_MATCH(DMI_PRODUCT_NAME, name) }, \ |
82 | &dmi_list[enumid] } |
83 | |
84 | static struct dmi_system_id __initdata dmi_system_table[] = { |
85 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17), |
86 | /* At least one of these two will be right; maybe both? */ |
87 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20), |
88 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20), |
89 | /* At least one of these two will be right; maybe both? */ |
90 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24), |
91 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24), |
92 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR), |
93 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI), |
94 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB), |
95 | /* At least one of these two will be right; maybe both? */ |
96 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB), |
97 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB), |
98 | /* At least one of these two will be right; maybe both? */ |
99 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB), |
100 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB), |
101 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB), |
102 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA), |
103 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP), |
104 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2), |
105 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2), |
106 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR), |
107 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR), |
108 | EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4), |
109 | {}, |
110 | }; |
111 | |
112 | static int set_system(const struct dmi_system_id *id) |
113 | { |
114 | struct efifb_dmi_info *info = id->driver_data; |
115 | if (info->base == 0) |
116 | return -ENODEV; |
117 | |
118 | printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p " |
119 | "(%dx%d, stride %d)\n", id->ident, |
120 | (void *)info->base, info->width, info->height, |
121 | info->stride); |
122 | |
123 | /* Trust the bootloader over the DMI tables */ |
124 | if (screen_info.lfb_base == 0) |
125 | screen_info.lfb_base = info->base; |
126 | if (screen_info.lfb_linelength == 0) |
127 | screen_info.lfb_linelength = info->stride; |
128 | if (screen_info.lfb_width == 0) |
129 | screen_info.lfb_width = info->width; |
130 | if (screen_info.lfb_height == 0) |
131 | screen_info.lfb_height = info->height; |
132 | if (screen_info.orig_video_isVGA == 0) |
133 | screen_info.orig_video_isVGA = VIDEO_TYPE_EFI; |
134 | |
135 | return 0; |
136 | } |
137 | |
138 | static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, |
139 | unsigned blue, unsigned transp, |
140 | struct fb_info *info) |
141 | { |
142 | /* |
143 | * Set a single color register. The values supplied are |
144 | * already rounded down to the hardware's capabilities |
145 | * (according to the entries in the `var' structure). Return |
146 | * != 0 for invalid regno. |
147 | */ |
148 | |
149 | if (regno >= info->cmap.len) |
150 | return 1; |
151 | |
152 | if (regno < 16) { |
153 | red >>= 8; |
154 | green >>= 8; |
155 | blue >>= 8; |
156 | ((u32 *)(info->pseudo_palette))[regno] = |
157 | (red << info->var.red.offset) | |
158 | (green << info->var.green.offset) | |
159 | (blue << info->var.blue.offset); |
160 | } |
161 | return 0; |
162 | } |
163 | |
164 | static void efifb_destroy(struct fb_info *info) |
165 | { |
166 | if (info->screen_base) |
167 | iounmap(info->screen_base); |
168 | release_mem_region(info->aperture_base, info->aperture_size); |
169 | framebuffer_release(info); |
170 | } |
171 | |
172 | static struct fb_ops efifb_ops = { |
173 | .owner = THIS_MODULE, |
174 | .fb_destroy = efifb_destroy, |
175 | .fb_setcolreg = efifb_setcolreg, |
176 | .fb_fillrect = cfb_fillrect, |
177 | .fb_copyarea = cfb_copyarea, |
178 | .fb_imageblit = cfb_imageblit, |
179 | }; |
180 | |
181 | static int __init efifb_setup(char *options) |
182 | { |
183 | char *this_opt; |
184 | int i; |
185 | |
186 | if (!options || !*options) |
187 | return 0; |
188 | |
189 | while ((this_opt = strsep(&options, ",")) != NULL) { |
190 | if (!*this_opt) continue; |
191 | |
192 | for (i = 0; i < M_UNKNOWN; i++) { |
193 | if (!strcmp(this_opt, dmi_list[i].optname) && |
194 | dmi_list[i].base != 0) { |
195 | screen_info.lfb_base = dmi_list[i].base; |
196 | screen_info.lfb_linelength = dmi_list[i].stride; |
197 | screen_info.lfb_width = dmi_list[i].width; |
198 | screen_info.lfb_height = dmi_list[i].height; |
199 | } |
200 | } |
201 | if (!strncmp(this_opt, "base:", 5)) |
202 | screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); |
203 | else if (!strncmp(this_opt, "stride:", 7)) |
204 | screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; |
205 | else if (!strncmp(this_opt, "height:", 7)) |
206 | screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); |
207 | else if (!strncmp(this_opt, "width:", 6)) |
208 | screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); |
209 | } |
210 | return 0; |
211 | } |
212 | |
213 | static int __devinit efifb_probe(struct platform_device *dev) |
214 | { |
215 | struct fb_info *info; |
216 | int err; |
217 | unsigned int size_vmode; |
218 | unsigned int size_remap; |
219 | unsigned int size_total; |
220 | int request_succeeded = 0; |
221 | |
222 | if (!screen_info.lfb_depth) |
223 | screen_info.lfb_depth = 32; |
224 | if (!screen_info.pages) |
225 | screen_info.pages = 1; |
226 | if (!screen_info.lfb_base) { |
227 | printk(KERN_DEBUG "efifb: invalid framebuffer address\n"); |
228 | return -ENODEV; |
229 | } |
230 | printk(KERN_INFO "efifb: probing for efifb\n"); |
231 | |
232 | /* just assume they're all unset if any are */ |
233 | if (!screen_info.blue_size) { |
234 | screen_info.blue_size = 8; |
235 | screen_info.blue_pos = 0; |
236 | screen_info.green_size = 8; |
237 | screen_info.green_pos = 8; |
238 | screen_info.red_size = 8; |
239 | screen_info.red_pos = 16; |
240 | screen_info.rsvd_size = 8; |
241 | screen_info.rsvd_pos = 24; |
242 | } |
243 | |
244 | efifb_fix.smem_start = screen_info.lfb_base; |
245 | efifb_defined.bits_per_pixel = screen_info.lfb_depth; |
246 | efifb_defined.xres = screen_info.lfb_width; |
247 | efifb_defined.yres = screen_info.lfb_height; |
248 | efifb_fix.line_length = screen_info.lfb_linelength; |
249 | |
250 | /* size_vmode -- that is the amount of memory needed for the |
251 | * used video mode, i.e. the minimum amount of |
252 | * memory we need. */ |
253 | size_vmode = efifb_defined.yres * efifb_fix.line_length; |
254 | |
255 | /* size_total -- all video memory we have. Used for |
256 | * entries, ressource allocation and bounds |
257 | * checking. */ |
258 | size_total = screen_info.lfb_size; |
259 | if (size_total < size_vmode) |
260 | size_total = size_vmode; |
261 | |
262 | /* size_remap -- the amount of video memory we are going to |
263 | * use for efifb. With modern cards it is no |
264 | * option to simply use size_total as that |
265 | * wastes plenty of kernel address space. */ |
266 | size_remap = size_vmode * 2; |
267 | if (size_remap > size_total) |
268 | size_remap = size_total; |
269 | if (size_remap % PAGE_SIZE) |
270 | size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); |
271 | efifb_fix.smem_len = size_remap; |
272 | |
273 | if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { |
274 | request_succeeded = 1; |
275 | } else { |
276 | /* We cannot make this fatal. Sometimes this comes from magic |
277 | spaces our resource handlers simply don't know about */ |
278 | printk(KERN_WARNING |
279 | "efifb: cannot reserve video memory at 0x%lx\n", |
280 | efifb_fix.smem_start); |
281 | } |
282 | |
283 | info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); |
284 | if (!info) { |
285 | printk(KERN_ERR "efifb: cannot allocate framebuffer\n"); |
286 | err = -ENOMEM; |
287 | goto err_release_mem; |
288 | } |
289 | info->pseudo_palette = info->par; |
290 | info->par = NULL; |
291 | |
292 | info->aperture_base = efifb_fix.smem_start; |
293 | info->aperture_size = size_remap; |
294 | |
295 | info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); |
296 | if (!info->screen_base) { |
297 | printk(KERN_ERR "efifb: abort, cannot ioremap video memory " |
298 | "0x%x @ 0x%lx\n", |
299 | efifb_fix.smem_len, efifb_fix.smem_start); |
300 | err = -EIO; |
301 | goto err_release_fb; |
302 | } |
303 | |
304 | printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, " |
305 | "using %dk, total %dk\n", |
306 | efifb_fix.smem_start, info->screen_base, |
307 | size_remap/1024, size_total/1024); |
308 | printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", |
309 | efifb_defined.xres, efifb_defined.yres, |
310 | efifb_defined.bits_per_pixel, efifb_fix.line_length, |
311 | screen_info.pages); |
312 | |
313 | efifb_defined.xres_virtual = efifb_defined.xres; |
314 | efifb_defined.yres_virtual = efifb_fix.smem_len / |
315 | efifb_fix.line_length; |
316 | printk(KERN_INFO "efifb: scrolling: redraw\n"); |
317 | efifb_defined.yres_virtual = efifb_defined.yres; |
318 | |
319 | /* some dummy values for timing to make fbset happy */ |
320 | efifb_defined.pixclock = 10000000 / efifb_defined.xres * |
321 | 1000 / efifb_defined.yres; |
322 | efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; |
323 | efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; |
324 | |
325 | efifb_defined.red.offset = screen_info.red_pos; |
326 | efifb_defined.red.length = screen_info.red_size; |
327 | efifb_defined.green.offset = screen_info.green_pos; |
328 | efifb_defined.green.length = screen_info.green_size; |
329 | efifb_defined.blue.offset = screen_info.blue_pos; |
330 | efifb_defined.blue.length = screen_info.blue_size; |
331 | efifb_defined.transp.offset = screen_info.rsvd_pos; |
332 | efifb_defined.transp.length = screen_info.rsvd_size; |
333 | |
334 | printk(KERN_INFO "efifb: %s: " |
335 | "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", |
336 | "Truecolor", |
337 | screen_info.rsvd_size, |
338 | screen_info.red_size, |
339 | screen_info.green_size, |
340 | screen_info.blue_size, |
341 | screen_info.rsvd_pos, |
342 | screen_info.red_pos, |
343 | screen_info.green_pos, |
344 | screen_info.blue_pos); |
345 | |
346 | efifb_fix.ypanstep = 0; |
347 | efifb_fix.ywrapstep = 0; |
348 | |
349 | info->fbops = &efifb_ops; |
350 | info->var = efifb_defined; |
351 | info->fix = efifb_fix; |
352 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE; |
353 | |
354 | if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) { |
355 | printk(KERN_ERR "efifb: cannot allocate colormap\n"); |
356 | goto err_unmap; |
357 | } |
358 | if ((err = register_framebuffer(info)) < 0) { |
359 | printk(KERN_ERR "efifb: cannot register framebuffer\n"); |
360 | goto err_fb_dealoc; |
361 | } |
362 | printk(KERN_INFO "fb%d: %s frame buffer device\n", |
363 | info->node, info->fix.id); |
364 | return 0; |
365 | |
366 | err_fb_dealoc: |
367 | fb_dealloc_cmap(&info->cmap); |
368 | err_unmap: |
369 | iounmap(info->screen_base); |
370 | err_release_fb: |
371 | framebuffer_release(info); |
372 | err_release_mem: |
373 | if (request_succeeded) |
374 | release_mem_region(efifb_fix.smem_start, size_total); |
375 | return err; |
376 | } |
377 | |
378 | static struct platform_driver efifb_driver = { |
379 | .probe = efifb_probe, |
380 | .driver = { |
381 | .name = "efifb", |
382 | }, |
383 | }; |
384 | |
385 | static struct platform_device efifb_device = { |
386 | .name = "efifb", |
387 | }; |
388 | |
389 | static int __init efifb_init(void) |
390 | { |
391 | int ret; |
392 | char *option = NULL; |
393 | |
394 | dmi_check_system(dmi_system_table); |
395 | |
396 | if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) |
397 | return -ENODEV; |
398 | |
399 | if (fb_get_options("efifb", &option)) |
400 | return -ENODEV; |
401 | efifb_setup(option); |
402 | |
403 | /* We don't get linelength from UGA Draw Protocol, only from |
404 | * EFI Graphics Protocol. So if it's not in DMI, and it's not |
405 | * passed in from the user, we really can't use the framebuffer. |
406 | */ |
407 | if (!screen_info.lfb_linelength) |
408 | return -ENODEV; |
409 | |
410 | ret = platform_driver_register(&efifb_driver); |
411 | |
412 | if (!ret) { |
413 | ret = platform_device_register(&efifb_device); |
414 | if (ret) |
415 | platform_driver_unregister(&efifb_driver); |
416 | } |
417 | return ret; |
418 | } |
419 | module_init(efifb_init); |
420 | |
421 | MODULE_LICENSE("GPL"); |
422 |
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