blob: 8dea2bc927054783658183f662d9644e2eb27efc [file] [log] [blame]
Huang, Ying7c831722007-11-28 16:21:55 -08001/*
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>
Peter Jones7c08c9a2008-10-15 22:03:43 -070015#include <linux/dmi.h>
Huang, Ying7c831722007-11-28 16:21:55 -080016
17#include <video/vga.h>
18
19static 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
30static 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
Peter Jones7c08c9a2008-10-15 22:03:43 -070037enum {
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
55static 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
76static 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
84static 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
112static 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;
Brian Malye14a6852009-03-31 15:25:50 -0700132 if (screen_info.orig_video_isVGA == 0)
133 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700134
135 return 0;
136}
137
Huang, Ying7c831722007-11-28 16:21:55 -0800138static 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
164static 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
Peter Jones7c08c9a2008-10-15 22:03:43 -0700172static 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
Huang, Ying7c831722007-11-28 16:21:55 -0800204static 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;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700211 int request_succeeded = 0;
212
Peter Jones7c08c9a2008-10-15 22:03:43 -0700213 if (!screen_info.lfb_depth)
214 screen_info.lfb_depth = 32;
215 if (!screen_info.pages)
216 screen_info.pages = 1;
Matthew Garrett133bb072009-04-13 14:39:44 -0700217 if (!screen_info.lfb_base) {
218 printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
219 return -ENODEV;
220 }
221 printk(KERN_INFO "efifb: probing for efifb\n");
Peter Jones7c08c9a2008-10-15 22:03:43 -0700222
223 /* just assume they're all unset if any are */
224 if (!screen_info.blue_size) {
225 screen_info.blue_size = 8;
226 screen_info.blue_pos = 0;
227 screen_info.green_size = 8;
228 screen_info.green_pos = 8;
229 screen_info.red_size = 8;
230 screen_info.red_pos = 16;
231 screen_info.rsvd_size = 8;
232 screen_info.rsvd_pos = 24;
233 }
Huang, Ying7c831722007-11-28 16:21:55 -0800234
235 efifb_fix.smem_start = screen_info.lfb_base;
236 efifb_defined.bits_per_pixel = screen_info.lfb_depth;
237 efifb_defined.xres = screen_info.lfb_width;
238 efifb_defined.yres = screen_info.lfb_height;
239 efifb_fix.line_length = screen_info.lfb_linelength;
240
241 /* size_vmode -- that is the amount of memory needed for the
242 * used video mode, i.e. the minimum amount of
243 * memory we need. */
244 size_vmode = efifb_defined.yres * efifb_fix.line_length;
245
246 /* size_total -- all video memory we have. Used for
247 * entries, ressource allocation and bounds
248 * checking. */
249 size_total = screen_info.lfb_size;
250 if (size_total < size_vmode)
251 size_total = size_vmode;
252
253 /* size_remap -- the amount of video memory we are going to
254 * use for efifb. With modern cards it is no
255 * option to simply use size_total as that
256 * wastes plenty of kernel address space. */
257 size_remap = size_vmode * 2;
Huang, Ying7c831722007-11-28 16:21:55 -0800258 if (size_remap > size_total)
259 size_remap = size_total;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700260 if (size_remap % PAGE_SIZE)
261 size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
Huang, Ying7c831722007-11-28 16:21:55 -0800262 efifb_fix.smem_len = size_remap;
263
Peter Jones7c08c9a2008-10-15 22:03:43 -0700264 if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
265 request_succeeded = 1;
266 } else {
Huang, Ying7c831722007-11-28 16:21:55 -0800267 /* We cannot make this fatal. Sometimes this comes from magic
268 spaces our resource handlers simply don't know about */
269 printk(KERN_WARNING
270 "efifb: cannot reserve video memory at 0x%lx\n",
271 efifb_fix.smem_start);
Peter Jones7c08c9a2008-10-15 22:03:43 -0700272 }
Huang, Ying7c831722007-11-28 16:21:55 -0800273
274 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
275 if (!info) {
Peter Jones7c08c9a2008-10-15 22:03:43 -0700276 printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
Huang, Ying7c831722007-11-28 16:21:55 -0800277 err = -ENOMEM;
278 goto err_release_mem;
279 }
280 info->pseudo_palette = info->par;
281 info->par = NULL;
282
283 info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len);
284 if (!info->screen_base) {
285 printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
286 "0x%x @ 0x%lx\n",
287 efifb_fix.smem_len, efifb_fix.smem_start);
288 err = -EIO;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700289 goto err_release_fb;
Huang, Ying7c831722007-11-28 16:21:55 -0800290 }
291
292 printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
293 "using %dk, total %dk\n",
294 efifb_fix.smem_start, info->screen_base,
295 size_remap/1024, size_total/1024);
296 printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
297 efifb_defined.xres, efifb_defined.yres,
298 efifb_defined.bits_per_pixel, efifb_fix.line_length,
299 screen_info.pages);
300
301 efifb_defined.xres_virtual = efifb_defined.xres;
302 efifb_defined.yres_virtual = efifb_fix.smem_len /
303 efifb_fix.line_length;
304 printk(KERN_INFO "efifb: scrolling: redraw\n");
305 efifb_defined.yres_virtual = efifb_defined.yres;
306
307 /* some dummy values for timing to make fbset happy */
308 efifb_defined.pixclock = 10000000 / efifb_defined.xres *
309 1000 / efifb_defined.yres;
310 efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
311 efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
312
313 efifb_defined.red.offset = screen_info.red_pos;
314 efifb_defined.red.length = screen_info.red_size;
315 efifb_defined.green.offset = screen_info.green_pos;
316 efifb_defined.green.length = screen_info.green_size;
317 efifb_defined.blue.offset = screen_info.blue_pos;
318 efifb_defined.blue.length = screen_info.blue_size;
319 efifb_defined.transp.offset = screen_info.rsvd_pos;
320 efifb_defined.transp.length = screen_info.rsvd_size;
321
322 printk(KERN_INFO "efifb: %s: "
323 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
324 "Truecolor",
325 screen_info.rsvd_size,
326 screen_info.red_size,
327 screen_info.green_size,
328 screen_info.blue_size,
329 screen_info.rsvd_pos,
330 screen_info.red_pos,
331 screen_info.green_pos,
332 screen_info.blue_pos);
333
334 efifb_fix.ypanstep = 0;
335 efifb_fix.ywrapstep = 0;
336
337 info->fbops = &efifb_ops;
338 info->var = efifb_defined;
339 info->fix = efifb_fix;
340 info->flags = FBINFO_FLAG_DEFAULT;
341
Peter Jones7c08c9a2008-10-15 22:03:43 -0700342 if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
343 printk(KERN_ERR "efifb: cannot allocate colormap\n");
Huang, Ying7c831722007-11-28 16:21:55 -0800344 goto err_unmap;
345 }
Peter Jones7c08c9a2008-10-15 22:03:43 -0700346 if ((err = register_framebuffer(info)) < 0) {
347 printk(KERN_ERR "efifb: cannot register framebuffer\n");
Huang, Ying7c831722007-11-28 16:21:55 -0800348 goto err_fb_dealoc;
349 }
350 printk(KERN_INFO "fb%d: %s frame buffer device\n",
Peter Jones7c08c9a2008-10-15 22:03:43 -0700351 info->node, info->fix.id);
Huang, Ying7c831722007-11-28 16:21:55 -0800352 return 0;
353
354err_fb_dealoc:
355 fb_dealloc_cmap(&info->cmap);
356err_unmap:
357 iounmap(info->screen_base);
Peter Jones7c08c9a2008-10-15 22:03:43 -0700358err_release_fb:
Huang, Ying7c831722007-11-28 16:21:55 -0800359 framebuffer_release(info);
360err_release_mem:
Peter Jones7c08c9a2008-10-15 22:03:43 -0700361 if (request_succeeded)
362 release_mem_region(efifb_fix.smem_start, size_total);
Huang, Ying7c831722007-11-28 16:21:55 -0800363 return err;
364}
365
366static struct platform_driver efifb_driver = {
367 .probe = efifb_probe,
368 .driver = {
369 .name = "efifb",
370 },
371};
372
373static struct platform_device efifb_device = {
374 .name = "efifb",
375};
376
377static int __init efifb_init(void)
378{
379 int ret;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700380 char *option = NULL;
Huang, Ying7c831722007-11-28 16:21:55 -0800381
Brian Malye14a6852009-03-31 15:25:50 -0700382 dmi_check_system(dmi_system_table);
383
Huang, Ying7c831722007-11-28 16:21:55 -0800384 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
385 return -ENODEV;
Peter Jones7c08c9a2008-10-15 22:03:43 -0700386
387 if (fb_get_options("efifb", &option))
388 return -ENODEV;
389 efifb_setup(option);
390
391 /* We don't get linelength from UGA Draw Protocol, only from
392 * EFI Graphics Protocol. So if it's not in DMI, and it's not
393 * passed in from the user, we really can't use the framebuffer.
394 */
395 if (!screen_info.lfb_linelength)
396 return -ENODEV;
Huang, Ying7c831722007-11-28 16:21:55 -0800397
398 ret = platform_driver_register(&efifb_driver);
399
400 if (!ret) {
401 ret = platform_device_register(&efifb_device);
402 if (ret)
403 platform_driver_unregister(&efifb_driver);
404 }
405 return ret;
406}
407module_init(efifb_init);
408
409MODULE_LICENSE("GPL");