[PATCH] vt: Remove VT-specific declarations and definitions from tty.h
[linux-2.6.git] / drivers / video / vesafb.c
1 /*
2  * framebuffer driver for VBE 2.0 compliant graphic boards
3  *
4  * switching to graphics mode happens at boot time (while
5  * running in real mode, see arch/i386/boot/video.S).
6  *
7  * (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
8  *
9  */
10
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
15 #include <linux/mm.h>
16 #include <linux/slab.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
24 #include <video/vga.h>
25 #include <asm/io.h>
26 #include <asm/mtrr.h>
27
28 #define dac_reg (0x3c8)
29 #define dac_val (0x3c9)
30
31 /* --------------------------------------------------------------------- */
32
33 static struct fb_var_screeninfo vesafb_defined __initdata = {
34         .activate       = FB_ACTIVATE_NOW,
35         .height         = -1,
36         .width          = -1,
37         .right_margin   = 32,
38         .upper_margin   = 16,
39         .lower_margin   = 4,
40         .vsync_len      = 4,
41         .vmode          = FB_VMODE_NONINTERLACED,
42 };
43
44 static struct fb_fix_screeninfo vesafb_fix __initdata = {
45         .id     = "VESA VGA",
46         .type   = FB_TYPE_PACKED_PIXELS,
47         .accel  = FB_ACCEL_NONE,
48 };
49
50 static int             inverse   = 0;
51 static int             mtrr      = 0; /* disable mtrr */
52 static int             vram_remap __initdata = 0; /* Set amount of memory to be used */
53 static int             vram_total __initdata = 0; /* Set total amount of memory */
54 static int             pmi_setpal = 1;  /* pmi for palette changes ??? */
55 static int             ypan       = 0;  /* 0..nothing, 1..ypan, 2..ywrap */
56 static unsigned short  *pmi_base  = NULL;
57 static void            (*pmi_start)(void);
58 static void            (*pmi_pal)(void);
59 static int             depth;
60 static int             vga_compat;
61 /* --------------------------------------------------------------------- */
62
63 static int vesafb_pan_display(struct fb_var_screeninfo *var,
64                               struct fb_info *info)
65 {
66 #ifdef __i386__
67         int offset;
68
69         offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
70
71         __asm__ __volatile__(
72                 "call *(%%edi)"
73                 : /* no return value */
74                 : "a" (0x4f07),         /* EAX */
75                   "b" (0),              /* EBX */
76                   "c" (offset),         /* ECX */
77                   "d" (offset >> 16),   /* EDX */
78                   "D" (&pmi_start));    /* EDI */
79 #endif
80         return 0;
81 }
82
83 static int vesa_setpalette(int regno, unsigned red, unsigned green,
84                             unsigned blue)
85 {
86         int shift = 16 - depth;
87         int err = -EINVAL;
88
89 /*
90  * Try VGA registers first...
91  */
92         if (vga_compat) {
93                 outb_p(regno,       dac_reg);
94                 outb_p(red   >> shift, dac_val);
95                 outb_p(green >> shift, dac_val);
96                 outb_p(blue  >> shift, dac_val);
97                 err = 0;
98         }
99
100 #ifdef __i386__
101 /*
102  * Fallback to the PMI....
103  */
104         if (err && pmi_setpal) {
105                 struct { u_char blue, green, red, pad; } entry;
106
107                 entry.red   = red   >> shift;
108                 entry.green = green >> shift;
109                 entry.blue  = blue  >> shift;
110                 entry.pad   = 0;
111                 __asm__ __volatile__(
112                 "call *(%%esi)"
113                 : /* no return value */
114                 : "a" (0x4f09),         /* EAX */
115                   "b" (0),              /* EBX */
116                   "c" (1),              /* ECX */
117                   "d" (regno),          /* EDX */
118                   "D" (&entry),         /* EDI */
119                   "S" (&pmi_pal));      /* ESI */
120                 err = 0;
121         }
122 #endif
123
124         return err;
125 }
126
127 static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
128                             unsigned blue, unsigned transp,
129                             struct fb_info *info)
130 {
131         int err = 0;
132
133         /*
134          *  Set a single color register. The values supplied are
135          *  already rounded down to the hardware's capabilities
136          *  (according to the entries in the `var' structure). Return
137          *  != 0 for invalid regno.
138          */
139         
140         if (regno >= info->cmap.len)
141                 return 1;
142
143         if (info->var.bits_per_pixel == 8)
144                 err = vesa_setpalette(regno,red,green,blue);
145         else if (regno < 16) {
146                 switch (info->var.bits_per_pixel) {
147                 case 16:
148                         if (info->var.red.offset == 10) {
149                                 /* 1:5:5:5 */
150                                 ((u32*) (info->pseudo_palette))[regno] =
151                                         ((red   & 0xf800) >>  1) |
152                                         ((green & 0xf800) >>  6) |
153                                         ((blue  & 0xf800) >> 11);
154                         } else {
155                                 /* 0:5:6:5 */
156                                 ((u32*) (info->pseudo_palette))[regno] =
157                                         ((red   & 0xf800)      ) |
158                                         ((green & 0xfc00) >>  5) |
159                                         ((blue  & 0xf800) >> 11);
160                         }
161                         break;
162                 case 24:
163                 case 32:
164                         red   >>= 8;
165                         green >>= 8;
166                         blue  >>= 8;
167                         ((u32 *)(info->pseudo_palette))[regno] =
168                                 (red   << info->var.red.offset)   |
169                                 (green << info->var.green.offset) |
170                                 (blue  << info->var.blue.offset);
171                         break;
172                 }
173         }
174
175         return err;
176 }
177
178 static struct fb_ops vesafb_ops = {
179         .owner          = THIS_MODULE,
180         .fb_setcolreg   = vesafb_setcolreg,
181         .fb_pan_display = vesafb_pan_display,
182         .fb_fillrect    = cfb_fillrect,
183         .fb_copyarea    = cfb_copyarea,
184         .fb_imageblit   = cfb_imageblit,
185 };
186
187 static int __init vesafb_setup(char *options)
188 {
189         char *this_opt;
190         
191         if (!options || !*options)
192                 return 0;
193         
194         while ((this_opt = strsep(&options, ",")) != NULL) {
195                 if (!*this_opt) continue;
196                 
197                 if (! strcmp(this_opt, "inverse"))
198                         inverse=1;
199                 else if (! strcmp(this_opt, "redraw"))
200                         ypan=0;
201                 else if (! strcmp(this_opt, "ypan"))
202                         ypan=1;
203                 else if (! strcmp(this_opt, "ywrap"))
204                         ypan=2;
205                 else if (! strcmp(this_opt, "vgapal"))
206                         pmi_setpal=0;
207                 else if (! strcmp(this_opt, "pmipal"))
208                         pmi_setpal=1;
209                 else if (! strncmp(this_opt, "mtrr:", 5))
210                         mtrr = simple_strtoul(this_opt+5, NULL, 0);
211                 else if (! strcmp(this_opt, "nomtrr"))
212                         mtrr=0;
213                 else if (! strncmp(this_opt, "vtotal:", 7))
214                         vram_total = simple_strtoul(this_opt+7, NULL, 0);
215                 else if (! strncmp(this_opt, "vremap:", 7))
216                         vram_remap = simple_strtoul(this_opt+7, NULL, 0);
217         }
218         return 0;
219 }
220
221 static int __init vesafb_probe(struct platform_device *dev)
222 {
223         struct fb_info *info;
224         int i, err;
225         unsigned int size_vmode;
226         unsigned int size_remap;
227         unsigned int size_total;
228
229         if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
230                 return -ENODEV;
231
232         vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
233         vesafb_fix.smem_start = screen_info.lfb_base;
234         vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
235         if (15 == vesafb_defined.bits_per_pixel)
236                 vesafb_defined.bits_per_pixel = 16;
237         vesafb_defined.xres = screen_info.lfb_width;
238         vesafb_defined.yres = screen_info.lfb_height;
239         vesafb_fix.line_length = screen_info.lfb_linelength;
240         vesafb_fix.visual   = (vesafb_defined.bits_per_pixel == 8) ?
241                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
242
243         /*   size_vmode -- that is the amount of memory needed for the
244          *                 used video mode, i.e. the minimum amount of
245          *                 memory we need. */
246         size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
247
248         /*   size_total -- all video memory we have. Used for mtrr
249          *                 entries, ressource allocation and bounds
250          *                 checking. */
251         size_total = screen_info.lfb_size * 65536;
252         if (vram_total)
253                 size_total = vram_total * 1024 * 1024;
254         if (size_total < size_vmode)
255                 size_total = size_vmode;
256
257         /*   size_remap -- the amount of video memory we are going to
258          *                 use for vesafb.  With modern cards it is no
259          *                 option to simply use size_total as that
260          *                 wastes plenty of kernel address space. */
261         size_remap  = size_vmode * 2;
262         if (vram_remap)
263                 size_remap = vram_remap * 1024 * 1024;
264         if (size_remap < size_vmode)
265                 size_remap = size_vmode;
266         if (size_remap > size_total)
267                 size_remap = size_total;
268         vesafb_fix.smem_len = size_remap;
269
270 #ifndef __i386__
271         screen_info.vesapm_seg = 0;
272 #endif
273
274         if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
275                 printk(KERN_WARNING
276                        "vesafb: cannot reserve video memory at 0x%lx\n",
277                         vesafb_fix.smem_start);
278                 /* We cannot make this fatal. Sometimes this comes from magic
279                    spaces our resource handlers simply don't know about */
280         }
281
282         info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
283         if (!info) {
284                 release_mem_region(vesafb_fix.smem_start, size_total);
285                 return -ENOMEM;
286         }
287         info->pseudo_palette = info->par;
288         info->par = NULL;
289
290         info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
291         if (!info->screen_base) {
292                 printk(KERN_ERR
293                        "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
294                         vesafb_fix.smem_len, vesafb_fix.smem_start);
295                 err = -EIO;
296                 goto err;
297         }
298
299         printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
300                "using %dk, total %dk\n",
301                vesafb_fix.smem_start, info->screen_base,
302                size_remap/1024, size_total/1024);
303         printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
304                vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
305
306         if (screen_info.vesapm_seg) {
307                 printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
308                        screen_info.vesapm_seg,screen_info.vesapm_off);
309         }
310
311         if (screen_info.vesapm_seg < 0xc000)
312                 ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
313
314         if (ypan || pmi_setpal) {
315                 pmi_base  = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
316                 pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
317                 pmi_pal   = (void*)((char*)pmi_base + pmi_base[2]);
318                 printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
319                 if (pmi_base[3]) {
320                         printk(KERN_INFO "vesafb: pmi: ports = ");
321                                 for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
322                                         printk("%x ",pmi_base[i]);
323                         printk("\n");
324                         if (pmi_base[i] != 0xffff) {
325                                 /*
326                                  * memory areas not supported (yet?)
327                                  *
328                                  * Rules are: we have to set up a descriptor for the requested
329                                  * memory area and pass it in the ES register to the BIOS function.
330                                  */
331                                 printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
332                                 ypan = pmi_setpal = 0;
333                         }
334                 }
335         }
336
337         if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
338                 printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
339                                     "        colors may be incorrect\n");
340                 vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
341         }
342
343         vesafb_defined.xres_virtual = vesafb_defined.xres;
344         vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
345         if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
346                 printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
347                        (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
348         } else {
349                 printk(KERN_INFO "vesafb: scrolling: redraw\n");
350                 vesafb_defined.yres_virtual = vesafb_defined.yres;
351                 ypan = 0;
352         }
353
354         /* some dummy values for timing to make fbset happy */
355         vesafb_defined.pixclock     = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
356         vesafb_defined.left_margin  = (vesafb_defined.xres / 8) & 0xf8;
357         vesafb_defined.hsync_len    = (vesafb_defined.xres / 8) & 0xf8;
358         
359         vesafb_defined.red.offset    = screen_info.red_pos;
360         vesafb_defined.red.length    = screen_info.red_size;
361         vesafb_defined.green.offset  = screen_info.green_pos;
362         vesafb_defined.green.length  = screen_info.green_size;
363         vesafb_defined.blue.offset   = screen_info.blue_pos;
364         vesafb_defined.blue.length   = screen_info.blue_size;
365         vesafb_defined.transp.offset = screen_info.rsvd_pos;
366         vesafb_defined.transp.length = screen_info.rsvd_size;
367
368         if (vesafb_defined.bits_per_pixel <= 8) {
369                 depth = vesafb_defined.green.length;
370                 vesafb_defined.red.length =
371                 vesafb_defined.green.length =
372                 vesafb_defined.blue.length =
373                 vesafb_defined.bits_per_pixel;
374         }
375
376         printk(KERN_INFO "vesafb: %s: "
377                "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
378                (vesafb_defined.bits_per_pixel > 8) ?
379                "Truecolor" : (vga_compat || pmi_setpal) ?
380                "Pseudocolor" : "Static Pseudocolor",
381                screen_info.rsvd_size,
382                screen_info.red_size,
383                screen_info.green_size,
384                screen_info.blue_size,
385                screen_info.rsvd_pos,
386                screen_info.red_pos,
387                screen_info.green_pos,
388                screen_info.blue_pos);
389
390         vesafb_fix.ypanstep  = ypan     ? 1 : 0;
391         vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
392
393         /* request failure does not faze us, as vgacon probably has this
394          * region already (FIXME) */
395         request_region(0x3c0, 32, "vesafb");
396
397 #ifdef CONFIG_MTRR
398         if (mtrr) {
399                 unsigned int temp_size = size_total;
400                 unsigned int type = 0;
401
402                 switch (mtrr) {
403                 case 1:
404                         type = MTRR_TYPE_UNCACHABLE;
405                         break;
406                 case 2:
407                         type = MTRR_TYPE_WRBACK;
408                         break;
409                 case 3:
410                         type = MTRR_TYPE_WRCOMB;
411                         break;
412                 case 4:
413                         type = MTRR_TYPE_WRTHROUGH;
414                         break;
415                 default:
416                         type = 0;
417                         break;
418                 }
419
420                 if (type) {
421                         int rc;
422
423                         /* Find the largest power-of-two */
424                         while (temp_size & (temp_size - 1))
425                                 temp_size &= (temp_size - 1);
426
427                         /* Try and find a power of two to add */
428                         do {
429                                 rc = mtrr_add(vesafb_fix.smem_start, temp_size,
430                                               type, 1);
431                                 temp_size >>= 1;
432                         } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
433                 }
434         }
435 #endif
436         
437         info->fbops = &vesafb_ops;
438         info->var = vesafb_defined;
439         info->fix = vesafb_fix;
440         info->flags = FBINFO_FLAG_DEFAULT |
441                 (ypan) ? FBINFO_HWACCEL_YPAN : 0;
442
443         if (!ypan)
444                 info->fbops->fb_pan_display = NULL;
445
446         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
447                 err = -ENOMEM;
448                 goto err;
449         }
450         if (register_framebuffer(info)<0) {
451                 err = -EINVAL;
452                 fb_dealloc_cmap(&info->cmap);
453                 goto err;
454         }
455         printk(KERN_INFO "fb%d: %s frame buffer device\n",
456                info->node, info->fix.id);
457         return 0;
458 err:
459         framebuffer_release(info);
460         release_mem_region(vesafb_fix.smem_start, size_total);
461         return err;
462 }
463
464 static struct platform_driver vesafb_driver = {
465         .probe  = vesafb_probe,
466         .driver = {
467                 .name   = "vesafb",
468         },
469 };
470
471 static struct platform_device *vesafb_device;
472
473 static int __init vesafb_init(void)
474 {
475         int ret;
476         char *option = NULL;
477
478         /* ignore error return of fb_get_options */
479         fb_get_options("vesafb", &option);
480         vesafb_setup(option);
481         ret = platform_driver_register(&vesafb_driver);
482
483         if (!ret) {
484                 vesafb_device = platform_device_alloc("vesafb", 0);
485
486                 if (vesafb_device)
487                         ret = platform_device_add(vesafb_device);
488                 else
489                         ret = -ENOMEM;
490
491                 if (ret) {
492                         platform_device_put(vesafb_device);
493                         platform_driver_unregister(&vesafb_driver);
494                 }
495         }
496
497         return ret;
498 }
499 module_init(vesafb_init);
500
501 MODULE_LICENSE("GPL");