Commit | Line | Data |
---|---|---|
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> |
7c83172b HY |
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 | ||
7c08c9ae PJ |
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; | |
e14a685d BM |
132 | if (screen_info.orig_video_isVGA == 0) |
133 | screen_info.orig_video_isVGA = VIDEO_TYPE_EFI; | |
7c08c9ae PJ |
134 | |
135 | return 0; | |
136 | } | |
137 | ||
7c83172b HY |
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 struct fb_ops efifb_ops = { | |
165 | .owner = THIS_MODULE, | |
166 | .fb_setcolreg = efifb_setcolreg, | |
167 | .fb_fillrect = cfb_fillrect, | |
168 | .fb_copyarea = cfb_copyarea, | |
169 | .fb_imageblit = cfb_imageblit, | |
170 | }; | |
171 | ||
7c08c9ae PJ |
172 | static int __init efifb_setup(char *options) |
173 | { | |
174 | char *this_opt; | |
175 | int i; | |
176 | ||
177 | if (!options || !*options) | |
178 | return 0; | |
179 | ||
180 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
181 | if (!*this_opt) continue; | |
182 | ||
183 | for (i = 0; i < M_UNKNOWN; i++) { | |
184 | if (!strcmp(this_opt, dmi_list[i].optname) && | |
185 | dmi_list[i].base != 0) { | |
186 | screen_info.lfb_base = dmi_list[i].base; | |
187 | screen_info.lfb_linelength = dmi_list[i].stride; | |
188 | screen_info.lfb_width = dmi_list[i].width; | |
189 | screen_info.lfb_height = dmi_list[i].height; | |
190 | } | |
191 | } | |
192 | if (!strncmp(this_opt, "base:", 5)) | |
193 | screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); | |
194 | else if (!strncmp(this_opt, "stride:", 7)) | |
195 | screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; | |
196 | else if (!strncmp(this_opt, "height:", 7)) | |
197 | screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); | |
198 | else if (!strncmp(this_opt, "width:", 6)) | |
199 | screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); | |
200 | } | |
201 | return 0; | |
202 | } | |
203 | ||
7c83172b HY |
204 | static int __init efifb_probe(struct platform_device *dev) |
205 | { | |
206 | struct fb_info *info; | |
207 | int err; | |
208 | unsigned int size_vmode; | |
209 | unsigned int size_remap; | |
210 | unsigned int size_total; | |
7c08c9ae PJ |
211 | int request_succeeded = 0; |
212 | ||
213 | printk(KERN_INFO "efifb: probing for efifb\n"); | |
214 | ||
215 | if (!screen_info.lfb_depth) | |
216 | screen_info.lfb_depth = 32; | |
217 | if (!screen_info.pages) | |
218 | screen_info.pages = 1; | |
219 | ||
220 | /* just assume they're all unset if any are */ | |
221 | if (!screen_info.blue_size) { | |
222 | screen_info.blue_size = 8; | |
223 | screen_info.blue_pos = 0; | |
224 | screen_info.green_size = 8; | |
225 | screen_info.green_pos = 8; | |
226 | screen_info.red_size = 8; | |
227 | screen_info.red_pos = 16; | |
228 | screen_info.rsvd_size = 8; | |
229 | screen_info.rsvd_pos = 24; | |
230 | } | |
7c83172b HY |
231 | |
232 | efifb_fix.smem_start = screen_info.lfb_base; | |
233 | efifb_defined.bits_per_pixel = screen_info.lfb_depth; | |
234 | efifb_defined.xres = screen_info.lfb_width; | |
235 | efifb_defined.yres = screen_info.lfb_height; | |
236 | efifb_fix.line_length = screen_info.lfb_linelength; | |
237 | ||
238 | /* size_vmode -- that is the amount of memory needed for the | |
239 | * used video mode, i.e. the minimum amount of | |
240 | * memory we need. */ | |
241 | size_vmode = efifb_defined.yres * efifb_fix.line_length; | |
242 | ||
243 | /* size_total -- all video memory we have. Used for | |
244 | * entries, ressource allocation and bounds | |
245 | * checking. */ | |
246 | size_total = screen_info.lfb_size; | |
247 | if (size_total < size_vmode) | |
248 | size_total = size_vmode; | |
249 | ||
250 | /* size_remap -- the amount of video memory we are going to | |
251 | * use for efifb. With modern cards it is no | |
252 | * option to simply use size_total as that | |
253 | * wastes plenty of kernel address space. */ | |
254 | size_remap = size_vmode * 2; | |
7c83172b HY |
255 | if (size_remap > size_total) |
256 | size_remap = size_total; | |
7c08c9ae PJ |
257 | if (size_remap % PAGE_SIZE) |
258 | size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE); | |
7c83172b HY |
259 | efifb_fix.smem_len = size_remap; |
260 | ||
7c08c9ae PJ |
261 | if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) { |
262 | request_succeeded = 1; | |
263 | } else { | |
7c83172b HY |
264 | /* We cannot make this fatal. Sometimes this comes from magic |
265 | spaces our resource handlers simply don't know about */ | |
266 | printk(KERN_WARNING | |
267 | "efifb: cannot reserve video memory at 0x%lx\n", | |
268 | efifb_fix.smem_start); | |
7c08c9ae | 269 | } |
7c83172b HY |
270 | |
271 | info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev); | |
272 | if (!info) { | |
7c08c9ae | 273 | printk(KERN_ERR "efifb: cannot allocate framebuffer\n"); |
7c83172b HY |
274 | err = -ENOMEM; |
275 | goto err_release_mem; | |
276 | } | |
277 | info->pseudo_palette = info->par; | |
278 | info->par = NULL; | |
279 | ||
280 | info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); | |
281 | if (!info->screen_base) { | |
282 | printk(KERN_ERR "efifb: abort, cannot ioremap video memory " | |
283 | "0x%x @ 0x%lx\n", | |
284 | efifb_fix.smem_len, efifb_fix.smem_start); | |
285 | err = -EIO; | |
7c08c9ae | 286 | goto err_release_fb; |
7c83172b HY |
287 | } |
288 | ||
289 | printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, " | |
290 | "using %dk, total %dk\n", | |
291 | efifb_fix.smem_start, info->screen_base, | |
292 | size_remap/1024, size_total/1024); | |
293 | printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n", | |
294 | efifb_defined.xres, efifb_defined.yres, | |
295 | efifb_defined.bits_per_pixel, efifb_fix.line_length, | |
296 | screen_info.pages); | |
297 | ||
298 | efifb_defined.xres_virtual = efifb_defined.xres; | |
299 | efifb_defined.yres_virtual = efifb_fix.smem_len / | |
300 | efifb_fix.line_length; | |
301 | printk(KERN_INFO "efifb: scrolling: redraw\n"); | |
302 | efifb_defined.yres_virtual = efifb_defined.yres; | |
303 | ||
304 | /* some dummy values for timing to make fbset happy */ | |
305 | efifb_defined.pixclock = 10000000 / efifb_defined.xres * | |
306 | 1000 / efifb_defined.yres; | |
307 | efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8; | |
308 | efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8; | |
309 | ||
310 | efifb_defined.red.offset = screen_info.red_pos; | |
311 | efifb_defined.red.length = screen_info.red_size; | |
312 | efifb_defined.green.offset = screen_info.green_pos; | |
313 | efifb_defined.green.length = screen_info.green_size; | |
314 | efifb_defined.blue.offset = screen_info.blue_pos; | |
315 | efifb_defined.blue.length = screen_info.blue_size; | |
316 | efifb_defined.transp.offset = screen_info.rsvd_pos; | |
317 | efifb_defined.transp.length = screen_info.rsvd_size; | |
318 | ||
319 | printk(KERN_INFO "efifb: %s: " | |
320 | "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", | |
321 | "Truecolor", | |
322 | screen_info.rsvd_size, | |
323 | screen_info.red_size, | |
324 | screen_info.green_size, | |
325 | screen_info.blue_size, | |
326 | screen_info.rsvd_pos, | |
327 | screen_info.red_pos, | |
328 | screen_info.green_pos, | |
329 | screen_info.blue_pos); | |
330 | ||
331 | efifb_fix.ypanstep = 0; | |
332 | efifb_fix.ywrapstep = 0; | |
333 | ||
334 | info->fbops = &efifb_ops; | |
335 | info->var = efifb_defined; | |
336 | info->fix = efifb_fix; | |
337 | info->flags = FBINFO_FLAG_DEFAULT; | |
338 | ||
7c08c9ae PJ |
339 | if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) { |
340 | printk(KERN_ERR "efifb: cannot allocate colormap\n"); | |
7c83172b HY |
341 | goto err_unmap; |
342 | } | |
7c08c9ae PJ |
343 | if ((err = register_framebuffer(info)) < 0) { |
344 | printk(KERN_ERR "efifb: cannot register framebuffer\n"); | |
7c83172b HY |
345 | goto err_fb_dealoc; |
346 | } | |
347 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
7c08c9ae | 348 | info->node, info->fix.id); |
7c83172b HY |
349 | return 0; |
350 | ||
351 | err_fb_dealoc: | |
352 | fb_dealloc_cmap(&info->cmap); | |
353 | err_unmap: | |
354 | iounmap(info->screen_base); | |
7c08c9ae | 355 | err_release_fb: |
7c83172b HY |
356 | framebuffer_release(info); |
357 | err_release_mem: | |
7c08c9ae PJ |
358 | if (request_succeeded) |
359 | release_mem_region(efifb_fix.smem_start, size_total); | |
7c83172b HY |
360 | return err; |
361 | } | |
362 | ||
363 | static struct platform_driver efifb_driver = { | |
364 | .probe = efifb_probe, | |
365 | .driver = { | |
366 | .name = "efifb", | |
367 | }, | |
368 | }; | |
369 | ||
370 | static struct platform_device efifb_device = { | |
371 | .name = "efifb", | |
372 | }; | |
373 | ||
374 | static int __init efifb_init(void) | |
375 | { | |
376 | int ret; | |
7c08c9ae | 377 | char *option = NULL; |
7c83172b | 378 | |
e14a685d BM |
379 | dmi_check_system(dmi_system_table); |
380 | ||
7c83172b HY |
381 | if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) |
382 | return -ENODEV; | |
7c08c9ae PJ |
383 | |
384 | if (fb_get_options("efifb", &option)) | |
385 | return -ENODEV; | |
386 | efifb_setup(option); | |
387 | ||
388 | /* We don't get linelength from UGA Draw Protocol, only from | |
389 | * EFI Graphics Protocol. So if it's not in DMI, and it's not | |
390 | * passed in from the user, we really can't use the framebuffer. | |
391 | */ | |
392 | if (!screen_info.lfb_linelength) | |
393 | return -ENODEV; | |
7c83172b HY |
394 | |
395 | ret = platform_driver_register(&efifb_driver); | |
396 | ||
397 | if (!ret) { | |
398 | ret = platform_device_register(&efifb_device); | |
399 | if (ret) | |
400 | platform_driver_unregister(&efifb_driver); | |
401 | } | |
402 | return ret; | |
403 | } | |
404 | module_init(efifb_init); | |
405 | ||
406 | MODULE_LICENSE("GPL"); |