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