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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / video / efifb.c
blob581d2dbf675a0061722db955a66d3fa402166db8
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");