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12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/string.h>
16#include <linux/mm.h>
17#include <linux/delay.h>
18#include <linux/fb.h>
19#include <linux/ioport.h>
20#include <linux/init.h>
21#include <linux/platform_device.h>
22#include <linux/screen_info.h>
23#include <linux/io.h>
24
25#include <video/vga.h>
26
27#define dac_reg (0x3c8)
28#define dac_val (0x3c9)
29
30
31
32struct vesafb_par {
33 u32 pseudo_palette[256];
34 int wc_cookie;
35};
36
37static struct fb_var_screeninfo vesafb_defined = {
38 .activate = FB_ACTIVATE_NOW,
39 .height = -1,
40 .width = -1,
41 .right_margin = 32,
42 .upper_margin = 16,
43 .lower_margin = 4,
44 .vsync_len = 4,
45 .vmode = FB_VMODE_NONINTERLACED,
46};
47
48static struct fb_fix_screeninfo vesafb_fix = {
49 .id = "VESA VGA",
50 .type = FB_TYPE_PACKED_PIXELS,
51 .accel = FB_ACCEL_NONE,
52};
53
54static int inverse __read_mostly;
55static int mtrr __read_mostly;
56static int vram_remap;
57static int vram_total;
58static int pmi_setpal __read_mostly = 1;
59static int ypan __read_mostly;
60static void (*pmi_start)(void) __read_mostly;
61static void (*pmi_pal) (void) __read_mostly;
62static int depth __read_mostly;
63static int vga_compat __read_mostly;
64
65
66static int vesafb_pan_display(struct fb_var_screeninfo *var,
67 struct fb_info *info)
68{
69#ifdef __i386__
70 int offset;
71
72 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
73
74 __asm__ __volatile__(
75 "call *(%%edi)"
76 :
77 : "a" (0x4f07),
78 "b" (0),
79 "c" (offset),
80 "d" (offset >> 16),
81 "D" (&pmi_start));
82#endif
83 return 0;
84}
85
86static int vesa_setpalette(int regno, unsigned red, unsigned green,
87 unsigned blue)
88{
89 int shift = 16 - depth;
90 int err = -EINVAL;
91
92
93
94
95 if (vga_compat) {
96 outb_p(regno, dac_reg);
97 outb_p(red >> shift, dac_val);
98 outb_p(green >> shift, dac_val);
99 outb_p(blue >> shift, dac_val);
100 err = 0;
101 }
102
103#ifdef __i386__
104
105
106
107 if (err && pmi_setpal) {
108 struct { u_char blue, green, red, pad; } entry;
109
110 entry.red = red >> shift;
111 entry.green = green >> shift;
112 entry.blue = blue >> shift;
113 entry.pad = 0;
114 __asm__ __volatile__(
115 "call *(%%esi)"
116 :
117 : "a" (0x4f09),
118 "b" (0),
119 "c" (1),
120 "d" (regno),
121 "D" (&entry),
122 "S" (&pmi_pal));
123 err = 0;
124 }
125#endif
126
127 return err;
128}
129
130static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
131 unsigned blue, unsigned transp,
132 struct fb_info *info)
133{
134 int err = 0;
135
136
137
138
139
140
141
142
143 if (regno >= info->cmap.len)
144 return 1;
145
146 if (info->var.bits_per_pixel == 8)
147 err = vesa_setpalette(regno,red,green,blue);
148 else if (regno < 16) {
149 switch (info->var.bits_per_pixel) {
150 case 16:
151 if (info->var.red.offset == 10) {
152
153 ((u32*) (info->pseudo_palette))[regno] =
154 ((red & 0xf800) >> 1) |
155 ((green & 0xf800) >> 6) |
156 ((blue & 0xf800) >> 11);
157 } else {
158
159 ((u32*) (info->pseudo_palette))[regno] =
160 ((red & 0xf800) ) |
161 ((green & 0xfc00) >> 5) |
162 ((blue & 0xf800) >> 11);
163 }
164 break;
165 case 24:
166 case 32:
167 red >>= 8;
168 green >>= 8;
169 blue >>= 8;
170 ((u32 *)(info->pseudo_palette))[regno] =
171 (red << info->var.red.offset) |
172 (green << info->var.green.offset) |
173 (blue << info->var.blue.offset);
174 break;
175 }
176 }
177
178 return err;
179}
180
181static void vesafb_destroy(struct fb_info *info)
182{
183 struct vesafb_par *par = info->par;
184
185 fb_dealloc_cmap(&info->cmap);
186 arch_phys_wc_del(par->wc_cookie);
187 if (info->screen_base)
188 iounmap(info->screen_base);
189 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
190}
191
192static struct fb_ops vesafb_ops = {
193 .owner = THIS_MODULE,
194 .fb_destroy = vesafb_destroy,
195 .fb_setcolreg = vesafb_setcolreg,
196 .fb_pan_display = vesafb_pan_display,
197 .fb_fillrect = cfb_fillrect,
198 .fb_copyarea = cfb_copyarea,
199 .fb_imageblit = cfb_imageblit,
200};
201
202static int vesafb_setup(char *options)
203{
204 char *this_opt;
205
206 if (!options || !*options)
207 return 0;
208
209 while ((this_opt = strsep(&options, ",")) != NULL) {
210 if (!*this_opt) continue;
211
212 if (! strcmp(this_opt, "inverse"))
213 inverse=1;
214 else if (! strcmp(this_opt, "redraw"))
215 ypan=0;
216 else if (! strcmp(this_opt, "ypan"))
217 ypan=1;
218 else if (! strcmp(this_opt, "ywrap"))
219 ypan=2;
220 else if (! strcmp(this_opt, "vgapal"))
221 pmi_setpal=0;
222 else if (! strcmp(this_opt, "pmipal"))
223 pmi_setpal=1;
224 else if (! strncmp(this_opt, "mtrr:", 5))
225 mtrr = simple_strtoul(this_opt+5, NULL, 0);
226 else if (! strcmp(this_opt, "nomtrr"))
227 mtrr=0;
228 else if (! strncmp(this_opt, "vtotal:", 7))
229 vram_total = simple_strtoul(this_opt+7, NULL, 0);
230 else if (! strncmp(this_opt, "vremap:", 7))
231 vram_remap = simple_strtoul(this_opt+7, NULL, 0);
232 }
233 return 0;
234}
235
236static int vesafb_probe(struct platform_device *dev)
237{
238 struct fb_info *info;
239 struct vesafb_par *par;
240 int i, err;
241 unsigned int size_vmode;
242 unsigned int size_remap;
243 unsigned int size_total;
244 char *option = NULL;
245
246
247 fb_get_options("vesafb", &option);
248 vesafb_setup(option);
249
250 if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
251 return -ENODEV;
252
253 vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
254 vesafb_fix.smem_start = screen_info.lfb_base;
255 vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
256 if (15 == vesafb_defined.bits_per_pixel)
257 vesafb_defined.bits_per_pixel = 16;
258 vesafb_defined.xres = screen_info.lfb_width;
259 vesafb_defined.yres = screen_info.lfb_height;
260 vesafb_fix.line_length = screen_info.lfb_linelength;
261 vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
262 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
263
264
265
266
267 size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
268
269
270
271
272 size_total = screen_info.lfb_size * 65536;
273 if (vram_total)
274 size_total = vram_total * 1024 * 1024;
275 if (size_total < size_vmode)
276 size_total = size_vmode;
277
278
279
280
281
282 size_remap = size_vmode * 2;
283 if (vram_remap)
284 size_remap = vram_remap * 1024 * 1024;
285 if (size_remap < size_vmode)
286 size_remap = size_vmode;
287 if (size_remap > size_total)
288 size_remap = size_total;
289 vesafb_fix.smem_len = size_remap;
290
291#ifndef __i386__
292 screen_info.vesapm_seg = 0;
293#endif
294
295 if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
296 printk(KERN_WARNING
297 "vesafb: cannot reserve video memory at 0x%lx\n",
298 vesafb_fix.smem_start);
299
300
301 }
302
303 info = framebuffer_alloc(sizeof(struct vesafb_par), &dev->dev);
304 if (!info) {
305 release_mem_region(vesafb_fix.smem_start, size_total);
306 return -ENOMEM;
307 }
308 platform_set_drvdata(dev, info);
309 par = info->par;
310 info->pseudo_palette = par->pseudo_palette;
311
312
313 info->apertures = alloc_apertures(1);
314 if (!info->apertures) {
315 err = -ENOMEM;
316 goto err;
317 }
318 info->apertures->ranges[0].base = screen_info.lfb_base;
319 info->apertures->ranges[0].size = size_total;
320
321 printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
322 vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
323
324 if (screen_info.vesapm_seg) {
325 printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
326 screen_info.vesapm_seg,screen_info.vesapm_off);
327 }
328
329 if (screen_info.vesapm_seg < 0xc000)
330 ypan = pmi_setpal = 0;
331
332 if (ypan || pmi_setpal) {
333 unsigned short *pmi_base;
334 pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
335 pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
336 pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
337 printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
338 if (pmi_base[3]) {
339 printk(KERN_INFO "vesafb: pmi: ports = ");
340 for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
341 printk("%x ", pmi_base[i]);
342 printk("\n");
343 if (pmi_base[i] != 0xffff) {
344
345
346
347
348
349
350 printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
351 ypan = pmi_setpal = 0;
352 }
353 }
354 }
355
356 if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
357 printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
358 " colors may be incorrect\n");
359 vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
360 }
361
362 vesafb_defined.xres_virtual = vesafb_defined.xres;
363 vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
364 if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
365 printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
366 (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
367 } else {
368 printk(KERN_INFO "vesafb: scrolling: redraw\n");
369 vesafb_defined.yres_virtual = vesafb_defined.yres;
370 ypan = 0;
371 }
372
373
374 vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
375 vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
376 vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
377
378 vesafb_defined.red.offset = screen_info.red_pos;
379 vesafb_defined.red.length = screen_info.red_size;
380 vesafb_defined.green.offset = screen_info.green_pos;
381 vesafb_defined.green.length = screen_info.green_size;
382 vesafb_defined.blue.offset = screen_info.blue_pos;
383 vesafb_defined.blue.length = screen_info.blue_size;
384 vesafb_defined.transp.offset = screen_info.rsvd_pos;
385 vesafb_defined.transp.length = screen_info.rsvd_size;
386
387 if (vesafb_defined.bits_per_pixel <= 8) {
388 depth = vesafb_defined.green.length;
389 vesafb_defined.red.length =
390 vesafb_defined.green.length =
391 vesafb_defined.blue.length =
392 vesafb_defined.bits_per_pixel;
393 }
394
395 printk(KERN_INFO "vesafb: %s: "
396 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
397 (vesafb_defined.bits_per_pixel > 8) ?
398 "Truecolor" : (vga_compat || pmi_setpal) ?
399 "Pseudocolor" : "Static Pseudocolor",
400 screen_info.rsvd_size,
401 screen_info.red_size,
402 screen_info.green_size,
403 screen_info.blue_size,
404 screen_info.rsvd_pos,
405 screen_info.red_pos,
406 screen_info.green_pos,
407 screen_info.blue_pos);
408
409 vesafb_fix.ypanstep = ypan ? 1 : 0;
410 vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
411
412
413
414 request_region(0x3c0, 32, "vesafb");
415
416 if (mtrr == 3) {
417 unsigned int temp_size = size_total;
418
419
420 temp_size = roundup_pow_of_two(temp_size);
421
422
423 do {
424 par->wc_cookie =
425 arch_phys_wc_add(vesafb_fix.smem_start,
426 temp_size);
427 temp_size >>= 1;
428 } while (temp_size >= PAGE_SIZE && par->wc_cookie < 0);
429
430 info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len);
431 } else {
432 if (mtrr && mtrr != 3)
433 WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n");
434 info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
435 }
436
437 if (!info->screen_base) {
438 printk(KERN_ERR
439 "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
440 vesafb_fix.smem_len, vesafb_fix.smem_start);
441 err = -EIO;
442 goto err;
443 }
444
445 printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
446 "using %dk, total %dk\n",
447 vesafb_fix.smem_start, info->screen_base,
448 size_remap/1024, size_total/1024);
449
450 info->fbops = &vesafb_ops;
451 info->var = vesafb_defined;
452 info->fix = vesafb_fix;
453 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE |
454 (ypan ? FBINFO_HWACCEL_YPAN : 0);
455
456 if (!ypan)
457 info->fbops->fb_pan_display = NULL;
458
459 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
460 err = -ENOMEM;
461 goto err;
462 }
463 if (register_framebuffer(info)<0) {
464 err = -EINVAL;
465 fb_dealloc_cmap(&info->cmap);
466 goto err;
467 }
468 fb_info(info, "%s frame buffer device\n", info->fix.id);
469 return 0;
470err:
471 arch_phys_wc_del(par->wc_cookie);
472 if (info->screen_base)
473 iounmap(info->screen_base);
474 framebuffer_release(info);
475 release_mem_region(vesafb_fix.smem_start, size_total);
476 return err;
477}
478
479static int vesafb_remove(struct platform_device *pdev)
480{
481 struct fb_info *info = platform_get_drvdata(pdev);
482
483 unregister_framebuffer(info);
484 framebuffer_release(info);
485
486 return 0;
487}
488
489static struct platform_driver vesafb_driver = {
490 .driver = {
491 .name = "vesa-framebuffer",
492 },
493 .probe = vesafb_probe,
494 .remove = vesafb_remove,
495};
496
497module_platform_driver(vesafb_driver);
498MODULE_LICENSE("GPL");
499
