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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
3 *
4 * Modified to new api Jan 2001 by James Simmons (jsimmons@transvirtual.com)
5 *
6 * Created 28 Dec 1997 by Geert Uytterhoeven
7 *
8 *
9 * I have started rewriting this driver as a example of the upcoming new API
10 * The primary goal is to remove the console code from fbdev and place it
11 * into fbcon.c. This reduces the code and makes writing a new fbdev driver
12 * easy since the author doesn't need to worry about console internals. It
13 * also allows the ability to run fbdev without a console/tty system on top
14 * of it.
15 *
16 * First the roles of struct fb_info and struct display have changed. Struct
17 * display will go away. The way the the new framebuffer console code will
18 * work is that it will act to translate data about the tty/console in
19 * struct vc_data to data in a device independent way in struct fb_info. Then
20 * various functions in struct fb_ops will be called to store the device
21 * dependent state in the par field in struct fb_info and to change the
22 * hardware to that state. This allows a very clean separation of the fbdev
23 * layer from the console layer. It also allows one to use fbdev on its own
24 * which is a bounus for embedded devices. The reason this approach works is
25 * for each framebuffer device when used as a tty/console device is allocated
26 * a set of virtual terminals to it. Only one virtual terminal can be active
27 * per framebuffer device. We already have all the data we need in struct
28 * vc_data so why store a bunch of colormaps and other fbdev specific data
29 * per virtual terminal.
30 *
31 * As you can see doing this makes the con parameter pretty much useless
32 * for struct fb_ops functions, as it should be. Also having struct
33 * fb_var_screeninfo and other data in fb_info pretty much eliminates the
34 * need for get_fix and get_var. Once all drivers use the fix, var, and cmap
35 * fbcon can be written around these fields. This will also eliminate the
36 * need to regenerate struct fb_var_screeninfo, struct fb_fix_screeninfo
37 * struct fb_cmap every time get_var, get_fix, get_cmap functions are called
38 * as many drivers do now.
39 *
40 * This file is subject to the terms and conditions of the GNU General Public
41 * License. See the file COPYING in the main directory of this archive for
42 * more details.
43 */
44
45#include <linux/module.h>
46#include <linux/kernel.h>
47#include <linux/errno.h>
48#include <linux/string.h>
49#include <linux/mm.h>
50#include <linux/tty.h>
51#include <linux/slab.h>
52#include <linux/delay.h>
53#include <linux/fb.h>
54#include <linux/init.h>
55
56 /*
57 * This is just simple sample code.
58 *
59 * No warranty that it actually compiles.
60 * Even less warranty that it actually works :-)
61 */
62
63/*
64 * If your driver supports multiple boards, you should make the
65 * below data types arrays, or allocate them dynamically (using kmalloc()).
66 */
67
68/*
69 * This structure defines the hardware state of the graphics card. Normally
70 * you place this in a header file in linux/include/video. This file usually
71 * also includes register information. That allows other driver subsystems
72 * and userland applications the ability to use the same header file to
73 * avoid duplicate work and easy porting of software.
74 */
75struct xxx_par;
76
77/*
78 * Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo
79 * if we don't use modedb. If we do use modedb see xxxfb_init how to use it
80 * to get a fb_var_screeninfo. Otherwise define a default var as well.
81 */
82static struct fb_fix_screeninfo xxxfb_fix __initdata = {
83 .id = "FB's name",
84 .type = FB_TYPE_PACKED_PIXELS,
85 .visual = FB_VISUAL_PSEUDOCOLOR,
86 .xpanstep = 1,
87 .ypanstep = 1,
88 .ywrapstep = 1,
89 .accel = FB_ACCEL_NONE,
90};
91
92 /*
93 * Modern graphical hardware not only supports pipelines but some
94 * also support multiple monitors where each display can have its
95 * its own unique data. In this case each display could be
96 * represented by a separate framebuffer device thus a separate
97 * struct fb_info. Now the struct xxx_par represents the graphics
98 * hardware state thus only one exist per card. In this case the
99 * struct xxx_par for each graphics card would be shared between
100 * every struct fb_info that represents a framebuffer on that card.
101 * This allows when one display changes it video resolution (info->var)
102 * the other displays know instantly. Each display can always be
103 * aware of the entire hardware state that affects it because they share
104 * the same xxx_par struct. The other side of the coin is multiple
105 * graphics cards that pass data around until it is finally displayed
106 * on one monitor. Such examples are the voodoo 1 cards and high end
107 * NUMA graphics servers. For this case we have a bunch of pars, each
108 * one that represents a graphics state, that belong to one struct
109 * fb_info. Their you would want to have *par point to a array of device
110 * states and have each struct fb_ops function deal with all those
111 * states. I hope this covers every possible hardware design. If not
112 * feel free to send your ideas at jsimmons@users.sf.net
113 */
114
115 /*
116 * If your driver supports multiple boards or it supports multiple
117 * framebuffers, you should make these arrays, or allocate them
118 * dynamically (using kmalloc()).
119 */
120static struct fb_info info;
121
122 /*
123 * Each one represents the state of the hardware. Most hardware have
124 * just one hardware state. These here represent the default state(s).
125 */
126static struct xxx_par __initdata current_par;
127
128int xxxfb_init(void);
129int xxxfb_setup(char*);
130
131/**
132 * xxxfb_open - Optional function. Called when the framebuffer is
133 * first accessed.
134 * @info: frame buffer structure that represents a single frame buffer
135 * @user: tell us if the userland (value=1) or the console is accessing
136 * the framebuffer.
137 *
138 * This function is the first function called in the framebuffer api.
139 * Usually you don't need to provide this function. The case where it
140 * is used is to change from a text mode hardware state to a graphics
141 * mode state.
142 *
143 * Returns negative errno on error, or zero on success.
144 */
145static int xxxfb_open(const struct fb_info *info, int user)
146{
147 return 0;
148}
149
150/**
151 * xxxfb_release - Optional function. Called when the framebuffer
152 * device is closed.
153 * @info: frame buffer structure that represents a single frame buffer
154 * @user: tell us if the userland (value=1) or the console is accessing
155 * the framebuffer.
156 *
157 * Thus function is called when we close /dev/fb or the framebuffer
158 * console system is released. Usually you don't need this function.
159 * The case where it is usually used is to go from a graphics state
160 * to a text mode state.
161 *
162 * Returns negative errno on error, or zero on success.
163 */
164static int xxxfb_release(const struct fb_info *info, int user)
165{
166 return 0;
167}
168
169/**
170 * xxxfb_check_var - Optional function. Validates a var passed in.
171 * @var: frame buffer variable screen structure
172 * @info: frame buffer structure that represents a single frame buffer
173 *
174 * Checks to see if the hardware supports the state requested by
175 * var passed in. This function does not alter the hardware state!!!
176 * This means the data stored in struct fb_info and struct xxx_par do
177 * not change. This includes the var inside of struct fb_info.
178 * Do NOT change these. This function can be called on its own if we
179 * intent to only test a mode and not actually set it. The stuff in
180 * modedb.c is a example of this. If the var passed in is slightly
181 * off by what the hardware can support then we alter the var PASSED in
182 * to what we can do. If the hardware doesn't support mode change
183 * a -EINVAL will be returned by the upper layers. You don't need to
184 * implement this function then. If you hardware doesn't support
185 * changing the resolution then this function is not needed. In this
186 * case the driver woudl just provide a var that represents the static
187 * state the screen is in.
188 *
189 * Returns negative errno on error, or zero on success.
190 */
191static int xxxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
192{
193 const struct xxx_par *par = (const struct xxx_par *) info->par;
194 /* ... */
195 return 0;
196}
197
198/**
199 * xxxfb_set_par - Optional function. Alters the hardware state.
200 * @info: frame buffer structure that represents a single frame buffer
201 *
202 * Using the fb_var_screeninfo in fb_info we set the resolution of the
203 * this particular framebuffer. This function alters the par AND the
204 * fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
205 * fb_info since we are using that data. This means we depend on the
206 * data in var inside fb_info to be supported by the hardware.
207 * xxxfb_check_var is always called before xxxfb_set_par to ensure this.
208 * Again if you can't change the resolution you don't need this function.
209 *
210 * Returns negative errno on error, or zero on success.
211 */
212static int xxxfb_set_par(struct fb_info *info)
213{
214 struct xxx_par *par = (struct xxx_par *) info->par;
215 /* ... */
216 return 0;
217}
218
219/**
220 * xxxfb_setcolreg - Optional function. Sets a color register.
221 * @regno: Which register in the CLUT we are programming
222 * @red: The red value which can be up to 16 bits wide
223 * @green: The green value which can be up to 16 bits wide
224 * @blue: The blue value which can be up to 16 bits wide.
225 * @transp: If supported, the alpha value which can be up to 16 bits wide.
226 * @info: frame buffer info structure
227 *
228 * Set a single color register. The values supplied have a 16 bit
229 * magnitude which needs to be scaled in this function for the hardware.
230 * Things to take into consideration are how many color registers, if
231 * any, are supported with the current color visual. With truecolor mode
232 * no color palettes are supported. Here a pseudo palette is created
233 * which we store the value in pseudo_palette in struct fb_info. For
234 * pseudocolor mode we have a limited color palette. To deal with this
235 * we can program what color is displayed for a particular pixel value.
236 * DirectColor is similar in that we can program each color field. If
237 * we have a static colormap we don't need to implement this function.
238 *
239 * Returns negative errno on error, or zero on success.
240 */
241static int xxxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
242 unsigned blue, unsigned transp,
243 const struct fb_info *info)
244{
245 if (regno >= 256) /* no. of hw registers */
246 return -EINVAL;
247 /*
248 * Program hardware... do anything you want with transp
249 */
250
251 /* grayscale works only partially under directcolor */
252 if (info->var.grayscale) {
253 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
254 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
255 }
256
257 /* Directcolor:
258 * var->{color}.offset contains start of bitfield
259 * var->{color}.length contains length of bitfield
260 * {hardwarespecific} contains width of DAC
261 * cmap[X] is programmed to (X << red.offset) | (X << green.offset) | (X << blue.offset)
262 * RAMDAC[X] is programmed to (red, green, blue)
263 *
264 * Pseudocolor:
265 * uses offset = 0 && length = DAC register width.
266 * var->{color}.offset is 0
267 * var->{color}.length contains widht of DAC
268 * cmap is not used
269 * DAC[X] is programmed to (red, green, blue)
270 * Truecolor:
271 * does not use RAMDAC (usually has 3 of them).
272 * var->{color}.offset contains start of bitfield
273 * var->{color}.length contains length of bitfield
274 * cmap is programmed to (red << red.offset) | (green << green.offset) |
275 * (blue << blue.offset) | (transp << transp.offset)
276 * RAMDAC does not exist
277 */
278#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
279 switch (info->fix.visual) {
280 case FB_VISUAL_TRUECOLOR:
281 case FB_VISUAL_PSEUDOCOLOR:
282 red = CNVT_TOHW(red, info->var.red.length);
283 green = CNVT_TOHW(green, info->var.green.length);
284 blue = CNVT_TOHW(blue, info->var.blue.length);
285 transp = CNVT_TOHW(transp, info->var.transp.length);
286 break;
287 case FB_VISUAL_DIRECTCOLOR:
288 /* example here assumes 8 bit DAC. Might be different
289 * for your hardware */
290 red = CNVT_TOHW(red, 8);
291 green = CNVT_TOHW(green, 8);
292 blue = CNVT_TOHW(blue, 8);
293 /* hey, there is bug in transp handling... */
294 transp = CNVT_TOHW(transp, 8);
295 break;
296 }
297#undef CNVT_TOHW
298 /* Truecolor has hardware independent palette */
299 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
300 u32 v;
301
302 if (regno >= 16)
303 return -EINVAL;
304
305 v = (red << info->var.red.offset) |
306 (green << info->var.green.offset) |
307 (blue << info->var.blue.offset) |
308 (transp << info->var.transp.offset);
309
310 switch (info->var.bits_per_pixel) {
311 case 8:
312 /* Yes some hand held devices have this. */
313 ((u8*)(info->pseudo_palette))[regno] = v;
314 break;
315 case 16:
316 ((u16*)(info->pseudo_palette))[regno] = v;
317 break;
318 case 24:
319 case 32:
320 ((u32*)(info->pseudo_palette))[regno] = v;
321 break;
322 }
323 return 0;
324 }
325 /* ... */
326 return 0;
327}
328
329/**
330 * xxxfb_pan_display - NOT a required function. Pans the display.
331 * @var: frame buffer variable screen structure
332 * @info: frame buffer structure that represents a single frame buffer
333 *
334 * Pan (or wrap, depending on the `vmode' field) the display using the
335 * `xoffset' and `yoffset' fields of the `var' structure.
336 * If the values don't fit, return -EINVAL.
337 *
338 * Returns negative errno on error, or zero on success.
339 */
340static int xxxfb_pan_display(struct fb_var_screeninfo *var,
341 const struct fb_info *info)
342{
343 /* ... */
344 return 0;
345}
346
347/**
348 * xxxfb_blank - NOT a required function. Blanks the display.
349 * @blank_mode: the blank mode we want.
350 * @info: frame buffer structure that represents a single frame buffer
351 *
352 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
353 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
354 * video mode which doesn't support it. Implements VESA suspend
355 * and powerdown modes on hardware that supports disabling hsync/vsync:
356 * blank_mode == 2: suspend vsync
357 * blank_mode == 3: suspend hsync
358 * blank_mode == 4: powerdown
359 *
360 * Returns negative errno on error, or zero on success.
361 *
362 */
363static int xxxfb_blank(int blank_mode, const struct fb_info *info)
364{
365 /* ... */
366 return 0;
367}
368
369/* ------------ Accelerated Functions --------------------- */
370
371/*
372 * We provide our own functions if we have hardware acceleration
373 * or non packed pixel format layouts. If we have no hardware
374 * acceleration, we can use a generic unaccelerated function. If using
375 * a pack pixel format just use the functions in cfb_*.c. Each file
376 * has one of the three different accel functions we support.
377 */
378
379/**
380 * xxxfb_fillrect - REQUIRED function. Can use generic routines if
381 * non acclerated hardware and packed pixel based.
382 * Draws a rectangle on the screen.
383 *
384 * @info: frame buffer structure that represents a single frame buffer
385 * @region: The structure representing the rectangular region we
386 * wish to draw to.
387 *
388 * This drawing operation places/removes a retangle on the screen
389 * depending on the rastering operation with the value of color which
390 * is in the current color depth format.
391 */
392void xxfb_fillrect(struct fb_info *p, const struct fb_fillrect *region)
393{
394/* Meaning of struct fb_fillrect
395 *
396 * @dx: The x and y corrdinates of the upper left hand corner of the
397 * @dy: area we want to draw to.
398 * @width: How wide the rectangle is we want to draw.
399 * @height: How tall the rectangle is we want to draw.
400 * @color: The color to fill in the rectangle with.
401 * @rop: The raster operation. We can draw the rectangle with a COPY
402 * of XOR which provides erasing effect.
403 */
404}
405
406/**
407 * xxxfb_copyarea - REQUIRED function. Can use generic routines if
408 * non acclerated hardware and packed pixel based.
409 * Copies one area of the screen to another area.
410 *
411 * @info: frame buffer structure that represents a single frame buffer
412 * @area: Structure providing the data to copy the framebuffer contents
413 * from one region to another.
414 *
415 * This drawing operation copies a rectangular area from one area of the
416 * screen to another area.
417 */
418void xxxfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
419{
420/*
421 * @dx: The x and y coordinates of the upper left hand corner of the
422 * @dy: destination area on the screen.
423 * @width: How wide the rectangle is we want to copy.
424 * @height: How tall the rectangle is we want to copy.
425 * @sx: The x and y coordinates of the upper left hand corner of the
426 * @sy: source area on the screen.
427 */
428}
429
430
431/**
432 * xxxfb_imageblit - REQUIRED function. Can use generic routines if
433 * non acclerated hardware and packed pixel based.
434 * Copies a image from system memory to the screen.
435 *
436 * @info: frame buffer structure that represents a single frame buffer
437 * @image: structure defining the image.
438 *
439 * This drawing operation draws a image on the screen. It can be a
440 * mono image (needed for font handling) or a color image (needed for
441 * tux).
442 */
443void xxxfb_imageblit(struct fb_info *p, const struct fb_image *image)
444{
445/*
446 * @dx: The x and y coordinates of the upper left hand corner of the
447 * @dy: destination area to place the image on the screen.
448 * @width: How wide the image is we want to copy.
449 * @height: How tall the image is we want to copy.
450 * @fg_color: For mono bitmap images this is color data for
451 * @bg_color: the foreground and background of the image to
452 * write directly to the frmaebuffer.
453 * @depth: How many bits represent a single pixel for this image.
454 * @data: The actual data used to construct the image on the display.
455 * @cmap: The colormap used for color images.
456 */
457}
458
459/**
460 * xxxfb_cursor - REQUIRED function. If your hardware lacks support
461 * for a cursor you can use the default cursor whose
462 * function is called soft_cursor. It will always
463 * work since it uses xxxfb_imageblit function which
464 * is required.
465 *
466 * @info: frame buffer structure that represents a single frame buffer
467 * @cursor: structure defining the cursor to draw.
468 *
469 * This operation is used to set or alter the properities of the
470 * cursor.
471 *
472 * Returns negative errno on error, or zero on success.
473 */
474int xxxfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
475{
476/*
477 * @set: Which fields we are altering in struct fb_cursor
478 * @enable: Disable or enable the cursor
479 * @rop: The bit operation we want to do.
480 * @mask: This is the cursor mask bitmap.
481 * @dest: A image of the area we are going to display the cursor.
482 * Used internally by the driver.
483 * @hot: The hot spot.
484 * @image: The actual data for the cursor image.
485 *
486 * NOTES ON FLAGS (cursor->set):
487 *
488 * FB_CUR_SETIMAGE - the cursor image has changed (cursor->image.data)
489 * FB_CUR_SETPOS - the cursor position has changed (cursor->image.dx|dy)
490 * FB_CUR_SETHOT - the cursor hot spot has changed (cursor->hot.dx|dy)
491 * FB_CUR_SETCMAP - the cursor colors has changed (cursor->fg_color|bg_color)
492 * FB_CUR_SETSHAPE - the cursor bitmask has changed (cursor->mask)
493 * FB_CUR_SETSIZE - the cursor size has changed (cursor->width|height)
494 * FB_CUR_SETALL - everything has changed
495 *
496 * NOTES ON ROPs (cursor->rop, Raster Operation)
497 *
498 * ROP_XOR - cursor->image.data XOR cursor->mask
499 * ROP_COPY - curosr->image.data AND cursor->mask
500 *
501 * OTHER NOTES:
502 *
503 * - fbcon only supports a 2-color cursor (cursor->image.depth = 1)
504 * - The fb_cursor structure, @cursor, _will_ always contain valid
505 * fields, whether any particular bitfields in cursor->set is set
506 * or not.
507 */
508}
509
510/**
511 * xxxfb_rotate - NOT a required function. If your hardware
512 * supports rotation the whole screen then
513 * you would provide a hook for this.
514 *
515 * @info: frame buffer structure that represents a single frame buffer
516 * @angle: The angle we rotate the screen.
517 *
518 * This operation is used to set or alter the properities of the
519 * cursor.
520 */
521void xxxfb_rotate(struct fb_info *info, int angle)
522{
523}
524
525/**
526 * xxxfb_poll - NOT a required function. The purpose of this
527 * function is to provide a way for some process
528 * to wait until a specific hardware event occurs
529 * for the framebuffer device.
530 *
531 * @info: frame buffer structure that represents a single frame buffer
532 * @wait: poll table where we store process that await a event.
533 */
534void xxxfb_poll(struct fb_info *info, poll_table *wait)
535{
536}
537
538/**
539 * xxxfb_sync - NOT a required function. Normally the accel engine
540 * for a graphics card take a specific amount of time.
541 * Often we have to wait for the accelerator to finish
542 * its operation before we can write to the framebuffer
543 * so we can have consistent display output.
544 *
545 * @info: frame buffer structure that represents a single frame buffer
546 */
547void xxxfb_sync(struct fb_info *info)
548{
549}
550
551 /*
552 * Initialization
553 */
554
555int __init xxxfb_init(void)
556{
557 int cmap_len, retval;
558
559 /*
560 * For kernel boot options (in 'video=xxxfb:<options>' format)
561 */
562#ifndef MODULE
563 char *option = NULL;
564
565 if (fb_get_options("xxxfb", &option))
566 return -ENODEV;
567 xxxfb_setup(option);
568#endif
569
570 /*
571 * Here we set the screen_base to the virtual memory address
572 * for the framebuffer. Usually we obtain the resource address
573 * from the bus layer and then translate it to virtual memory
574 * space via ioremap. Consult ioport.h.
575 */
576 info.screen_base = framebuffer_virtual_memory;
577 info.fbops = &xxxfb_ops;
578 info.fix = xxxfb_fix;
579 info.pseudo_palette = pseudo_palette;
580
581 /*
582 * Set up flags to indicate what sort of acceleration your
583 * driver can provide (pan/wrap/copyarea/etc.) and whether it
584 * is a module -- see FBINFO_* in include/linux/fb.h
585 */
586 info.flags = FBINFO_DEFAULT;
587 info.par = current_par;
588
589 /*
590 * This should give a reasonable default video mode. The following is
591 * done when we can set a video mode.
592 */
593 if (!mode_option)
594 mode_option = "640x480@60";
595
596 retval = fb_find_mode(&info.var, &info, mode_option, NULL, 0, NULL, 8);
597
598 if (!retval || retval == 4)
599 return -EINVAL;
600
601 /* This has to been done !!! */
602 fb_alloc_cmap(&info.cmap, cmap_len, 0);
603
604 /*
605 * The following is done in the case of having hardware with a static
606 * mode. If we are setting the mode ourselves we don't call this.
607 */
608 info.var = xxxfb_var;
609
610 if (register_framebuffer(&info) < 0)
611 return -EINVAL;
612 printk(KERN_INFO "fb%d: %s frame buffer device\n", info.node,
613 info.fix.id);
614 return 0;
615}
616
617 /*
618 * Cleanup
619 */
620
621static void __exit xxxfb_cleanup(void)
622{
623 /*
624 * If your driver supports multiple boards, you should unregister and
625 * clean up all instances.
626 */
627
628 unregister_framebuffer(info);
629 fb_dealloc_cmap(&info.cmap);
630 /* ... */
631}
632
633 /*
634 * Setup
635 */
636
637/*
638 * Only necessary if your driver takes special options,
639 * otherwise we fall back on the generic fb_setup().
640 */
641int __init xxxfb_setup(char *options)
642{
643 /* Parse user speficied options (`video=xxxfb:') */
644}
645
646/* ------------------------------------------------------------------------- */
647
648 /*
649 * Frame buffer operations
650 */
651
652static struct fb_ops xxxfb_ops = {
653 .owner = THIS_MODULE,
654 .fb_open = xxxfb_open,
655 .fb_read = xxxfb_read,
656 .fb_write = xxxfb_write,
657 .fb_release = xxxfb_release,
658 .fb_check_var = xxxfb_check_var,
659 .fb_set_par = xxxfb_set_par,
660 .fb_setcolreg = xxxfb_setcolreg,
661 .fb_blank = xxxfb_blank,
662 .fb_pan_display = xxxfb_pan_display,
663 .fb_fillrect = xxxfb_fillrect, /* Needed !!! */
664 .fb_copyarea = xxxfb_copyarea, /* Needed !!! */
665 .fb_imageblit = xxxfb_imageblit, /* Needed !!! */
666 .fb_cursor = xxxfb_cursor, /* Needed !!! */
667 .fb_rotate = xxxfb_rotate,
668 .fb_poll = xxxfb_poll,
669 .fb_sync = xxxfb_sync,
670 .fb_ioctl = xxxfb_ioctl,
671 .fb_mmap = xxxfb_mmap,
672};
673
674/* ------------------------------------------------------------------------- */
675
676
677 /*
678 * Modularization
679 */
680
681module_init(xxxfb_init);
682module_exit(xxxfb_cleanup);
683
684MODULE_LICENSE("GPL");