drivers/video/hgafb.c

   1 /*
   2  * linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device
   3  *
   4  *      Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu)
   5  *      Based on skeletonfb.c by Geert Uytterhoeven and
   6  *               mdacon.c by Andrew Apted
   7  *
   8  * History:
   9  *
  10  * - Revision 0.1.8 (23 Oct 2002): Ported to new framebuffer api.
  11  *
  12  * - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards
  13  *                                 being detected as Hercules.   (Paul G.)
  14  * - Revision 0.1.6 (17 Aug 2000): new style structs
  15  *                                 documentation
  16  * - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc
  17  *                                 minor fixes
  18  * - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for
  19  *                                  HGA-only systems
  20  * - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure
  21  *                                 screen is cleared after rmmod
  22  *                                 virtual resolutions
  23  *                                 module parameter 'nologo={0|1}'
  24  *                                 the most important: boot logo :)
  25  * - Revision 0.1.0  (6 Dec 1999): faster scrolling and minor fixes
  26  * - First release  (25 Nov 1999)
  27  *
  28  * This file is subject to the terms and conditions of the GNU General Public
  29  * License.  See the file COPYING in the main directory of this archive
  30  * for more details.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/errno.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/string.h>
  38 #include <linux/mm.h>
  39 #include <linux/tty.h>
  40 #include <linux/slab.h>
  41 #include <linux/delay.h>
  42 #include <linux/fb.h>
  43 #include <linux/init.h>
  44 #include <linux/ioport.h>
  45 #include <linux/platform_device.h>
  46 #include <asm/io.h>
  47 #include <asm/vga.h>
  48
  49 #if 0
  50 #define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args)
  51 #else
  52 #define DPRINTK(args...)
  53 #endif
  54
  55 #if 0
  56 #define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; }
  57 #else
  58 #define CHKINFO(ret)
  59 #endif
  60
  61 /* Description of the hardware layout */
  62
  63 static void __iomem *hga_vram;                  /* Base of video memory */
  64 static unsigned long hga_vram_len;              /* Size of video memory */
  65
  66 #define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90)
  67 #define HGA_TXT                 0
  68 #define HGA_GFX                 1
  69
  70 static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row)
  71 {
  72         return info->screen_base + HGA_ROWADDR(row);
  73 }
  74
  75 static int hga_mode = -1;                       /* 0 = txt, 1 = gfx mode */
  76
  77 static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type;
  78 static char *hga_type_name;
  79
  80 #define HGA_INDEX_PORT          0x3b4           /* Register select port */
  81 #define HGA_VALUE_PORT          0x3b5           /* Register value port */
  82 #define HGA_MODE_PORT           0x3b8           /* Mode control port */
  83 #define HGA_STATUS_PORT         0x3ba           /* Status and Config port */
  84 #define HGA_GFX_PORT            0x3bf           /* Graphics control port */
  85
  86 /* HGA register values */
  87
  88 #define HGA_CURSOR_BLINKING     0x00
  89 #define HGA_CURSOR_OFF          0x20
  90 #define HGA_CURSOR_SLOWBLINK    0x60
  91
  92 #define HGA_MODE_GRAPHICS       0x02
  93 #define HGA_MODE_VIDEO_EN       0x08
  94 #define HGA_MODE_BLINK_EN       0x20
  95 #define HGA_MODE_GFX_PAGE1      0x80
  96
  97 #define HGA_STATUS_HSYNC        0x01
  98 #define HGA_STATUS_VSYNC        0x80
  99 #define HGA_STATUS_VIDEO        0x08
 100
 101 #define HGA_CONFIG_COL132       0x08
 102 #define HGA_GFX_MODE_EN         0x01
 103 #define HGA_GFX_PAGE_EN         0x02
 104
 105 /* Global locks */
 106
 107 static DEFINE_SPINLOCK(hga_reg_lock);
 108
 109 /* Framebuffer driver structures */
 110
 111 static struct fb_var_screeninfo __initdata hga_default_var = {
 112         .xres           = 720,
 113         .yres           = 348,
 114         .xres_virtual   = 720,
 115         .yres_virtual   = 348,
 116         .bits_per_pixel = 1,
 117         .red            = {0, 1, 0},
 118         .green          = {0, 1, 0},
 119         .blue           = {0, 1, 0},
 120         .transp         = {0, 0, 0},
 121         .height         = -1,
 122         .width          = -1,
 123 };
 124
 125 static struct fb_fix_screeninfo __initdata hga_fix = {
 126         .id             = "HGA",
 127         .type           = FB_TYPE_PACKED_PIXELS,        /* (not sure) */
 128         .visual         = FB_VISUAL_MONO10,
 129         .xpanstep       = 8,
 130         .ypanstep       = 8,
 131         .line_length    = 90,
 132         .accel          = FB_ACCEL_NONE
 133 };
 134
 135 /* Don't assume that tty1 will be the initial current console. */
 136 static int release_io_port = 0;
 137 static int release_io_ports = 0;
 138 static int nologo = 0;
 139
 140 /* -------------------------------------------------------------------------
 141  *
 142  * Low level hardware functions
 143  *
 144  * ------------------------------------------------------------------------- */
 145
 146 static void write_hga_b(unsigned int val, unsigned char reg)
 147 {
 148         outb_p(reg, HGA_INDEX_PORT);
 149         outb_p(val, HGA_VALUE_PORT);
 150 }
 151
 152 static void write_hga_w(unsigned int val, unsigned char reg)
 153 {
 154         outb_p(reg,   HGA_INDEX_PORT); outb_p(val >> 8,   HGA_VALUE_PORT);
 155         outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT);
 156 }
 157
 158 static int test_hga_b(unsigned char val, unsigned char reg)
 159 {
 160         outb_p(reg, HGA_INDEX_PORT);
 161         outb  (val, HGA_VALUE_PORT);
 162         udelay(20); val = (inb_p(HGA_VALUE_PORT) == val);
 163         return val;
 164 }
 165
 166 static void hga_clear_screen(void)
 167 {
 168         unsigned char fillchar = 0xbf; /* magic */
 169         unsigned long flags;
 170
 171         spin_lock_irqsave(&hga_reg_lock, flags);
 172         if (hga_mode == HGA_TXT)
 173                 fillchar = ' ';
 174         else if (hga_mode == HGA_GFX)
 175                 fillchar = 0x00;
 176         spin_unlock_irqrestore(&hga_reg_lock, flags);
 177         if (fillchar != 0xbf)
 178                 memset_io(hga_vram, fillchar, hga_vram_len);
 179 }
 180
 181 static void hga_txt_mode(void)
 182 {
 183         unsigned long flags;
 184
 185         spin_lock_irqsave(&hga_reg_lock, flags);
 186         outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT);
 187         outb_p(0x00, HGA_GFX_PORT);
 188         outb_p(0x00, HGA_STATUS_PORT);
 189
 190         write_hga_b(0x61, 0x00);        /* horizontal total */
 191         write_hga_b(0x50, 0x01);        /* horizontal displayed */
 192         write_hga_b(0x52, 0x02);        /* horizontal sync pos */
 193         write_hga_b(0x0f, 0x03);        /* horizontal sync width */
 194
 195         write_hga_b(0x19, 0x04);        /* vertical total */
 196         write_hga_b(0x06, 0x05);        /* vertical total adjust */
 197         write_hga_b(0x19, 0x06);        /* vertical displayed */
 198         write_hga_b(0x19, 0x07);        /* vertical sync pos */
 199
 200         write_hga_b(0x02, 0x08);        /* interlace mode */
 201         write_hga_b(0x0d, 0x09);        /* maximum scanline */
 202         write_hga_b(0x0c, 0x0a);        /* cursor start */
 203         write_hga_b(0x0d, 0x0b);        /* cursor end */
 204
 205         write_hga_w(0x0000, 0x0c);      /* start address */
 206         write_hga_w(0x0000, 0x0e);      /* cursor location */
 207
 208         hga_mode = HGA_TXT;
 209         spin_unlock_irqrestore(&hga_reg_lock, flags);
 210 }
 211
 212 static void hga_gfx_mode(void)
 213 {
 214         unsigned long flags;
 215
 216         spin_lock_irqsave(&hga_reg_lock, flags);
 217         outb_p(0x00, HGA_STATUS_PORT);
 218         outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT);
 219         outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
 220
 221         write_hga_b(0x35, 0x00);        /* horizontal total */
 222         write_hga_b(0x2d, 0x01);        /* horizontal displayed */
 223         write_hga_b(0x2e, 0x02);        /* horizontal sync pos */
 224         write_hga_b(0x07, 0x03);        /* horizontal sync width */
 225
 226         write_hga_b(0x5b, 0x04);        /* vertical total */
 227         write_hga_b(0x02, 0x05);        /* vertical total adjust */
 228         write_hga_b(0x57, 0x06);        /* vertical displayed */
 229         write_hga_b(0x57, 0x07);        /* vertical sync pos */
 230
 231         write_hga_b(0x02, 0x08);        /* interlace mode */
 232         write_hga_b(0x03, 0x09);        /* maximum scanline */
 233         write_hga_b(0x00, 0x0a);        /* cursor start */
 234         write_hga_b(0x00, 0x0b);        /* cursor end */
 235
 236         write_hga_w(0x0000, 0x0c);      /* start address */
 237         write_hga_w(0x0000, 0x0e);      /* cursor location */
 238
 239         hga_mode = HGA_GFX;
 240         spin_unlock_irqrestore(&hga_reg_lock, flags);
 241 }
 242
 243 static void hga_show_logo(struct fb_info *info)
 244 {
 245 /*
 246         void __iomem *dest = hga_vram;
 247         char *logo = linux_logo_bw;
 248         int x, y;
 249
 250         for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup *
 251                 for (x = 0; x < 10 ; x++)
 252                         writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40));
 253 */
 254 }
 255
 256 static void hga_pan(unsigned int xoffset, unsigned int yoffset)
 257 {
 258         unsigned int base;
 259         unsigned long flags;
 260
 261         base = (yoffset / 8) * 90 + xoffset;
 262         spin_lock_irqsave(&hga_reg_lock, flags);
 263         write_hga_w(base, 0x0c);        /* start address */
 264         spin_unlock_irqrestore(&hga_reg_lock, flags);
 265         DPRINTK("hga_pan: base:%d\n", base);
 266 }
 267
 268 static void hga_blank(int blank_mode)
 269 {
 270         unsigned long flags;
 271
 272         spin_lock_irqsave(&hga_reg_lock, flags);
 273         if (blank_mode) {
 274                 outb_p(0x00, HGA_MODE_PORT);    /* disable video */
 275         } else {
 276                 outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT);
 277         }
 278         spin_unlock_irqrestore(&hga_reg_lock, flags);
 279 }
 280
 281 static int __init hga_card_detect(void)
 282 {
 283         int count=0;
 284         void __iomem *p, *q;
 285         unsigned short p_save, q_save;
 286
 287         hga_vram_len  = 0x08000;
 288
 289         hga_vram = ioremap(0xb0000, hga_vram_len);
 290
 291         if (request_region(0x3b0, 12, "hgafb"))
 292                 release_io_ports = 1;
 293         if (request_region(0x3bf, 1, "hgafb"))
 294                 release_io_port = 1;
 295
 296         /* do a memory check */
 297
 298         p = hga_vram;
 299         q = hga_vram + 0x01000;
 300
 301         p_save = readw(p); q_save = readw(q);
 302
 303         writew(0xaa55, p); if (readw(p) == 0xaa55) count++;
 304         writew(0x55aa, p); if (readw(p) == 0x55aa) count++;
 305         writew(p_save, p);
 306
 307         if (count != 2) {
 308                 return 0;
 309         }
 310
 311         /* Ok, there is definitely a card registering at the correct
 312          * memory location, so now we do an I/O port test.
 313          */
 314
 315         if (!test_hga_b(0x66, 0x0f)) {      /* cursor low register */
 316                 return 0;
 317         }
 318         if (!test_hga_b(0x99, 0x0f)) {     /* cursor low register */
 319                 return 0;
 320         }
 321
 322         /* See if the card is a Hercules, by checking whether the vsync
 323          * bit of the status register is changing.  This test lasts for
 324          * approximately 1/10th of a second.
 325          */
 326
 327         p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
 328
 329         for (count=0; count < 50000 && p_save == q_save; count++) {
 330                 q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC;
 331                 udelay(2);
 332         }
 333
 334         if (p_save == q_save)
 335                 return 0;
 336
 337         switch (inb_p(HGA_STATUS_PORT) & 0x70) {
 338                 case 0x10:
 339                         hga_type = TYPE_HERCPLUS;
 340                         hga_type_name = "HerculesPlus";
 341                         break;
 342                 case 0x50:
 343                         hga_type = TYPE_HERCCOLOR;
 344                         hga_type_name = "HerculesColor";
 345                         break;
 346                 default:
 347                         hga_type = TYPE_HERC;
 348                         hga_type_name = "Hercules";
 349                         break;
 350         }
 351         return 1;
 352 }
 353
 354 /**
 355  *      hgafb_open - open the framebuffer device
 356  *      @info:pointer to fb_info object containing info for current hga board
 357  *      @int:open by console system or userland.
 358  */
 359
 360 static int hgafb_open(struct fb_info *info, int init)
 361 {
 362         hga_gfx_mode();
 363         hga_clear_screen();
 364         if (!nologo) hga_show_logo(info);
 365         return 0;
 366 }
 367
 368 /**
 369  *      hgafb_open - open the framebuffer device
 370  *      @info:pointer to fb_info object containing info for current hga board
 371  *      @int:open by console system or userland.
 372  */
 373
 374 static int hgafb_release(struct fb_info *info, int init)
 375 {
 376         hga_txt_mode();
 377         hga_clear_screen();
 378         return 0;
 379 }
 380
 381 /**
 382  *      hgafb_setcolreg - set color registers
 383  *      @regno:register index to set
 384  *      @red:red value, unused
 385  *      @green:green value, unused
 386  *      @blue:blue value, unused
 387  *      @transp:transparency value, unused
 388  *      @info:unused
 389  *
 390  *      This callback function is used to set the color registers of a HGA
 391  *      board. Since we have only two fixed colors only @regno is checked.
 392  *      A zero is returned on success and 1 for failure.
 393  */
 394
 395 static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 396                            u_int transp, struct fb_info *info)
 397 {
 398         if (regno > 1)
 399                 return 1;
 400         return 0;
 401 }
 402
 403 /**
 404  *      hga_pan_display - pan or wrap the display
 405  *      @var:contains new xoffset, yoffset and vmode values
 406  *      @info:pointer to fb_info object containing info for current hga board
 407  *
 408  *      This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP
 409  *      flag in @var. If input parameters are correct it calls hga_pan() to
 410  *      program the hardware. @info->var is updated to the new values.
 411  *      A zero is returned on success and %-EINVAL for failure.
 412  */
 413
 414 static int hgafb_pan_display(struct fb_var_screeninfo *var,
 415                              struct fb_info *info)
 416 {
 417         if (var->vmode & FB_VMODE_YWRAP) {
 418                 if (var->yoffset < 0 ||
 419                     var->yoffset >= info->var.yres_virtual ||
 420                     var->xoffset)
 421                         return -EINVAL;
 422         } else {
 423                 if (var->xoffset + var->xres > info->var.xres_virtual
 424                  || var->yoffset + var->yres > info->var.yres_virtual
 425                  || var->yoffset % 8)
 426                         return -EINVAL;
 427         }
 428
 429         hga_pan(var->xoffset, var->yoffset);
 430         return 0;
 431 }
 432
 433 /**
 434  *      hgafb_blank - (un)blank the screen
 435  *      @blank_mode:blanking method to use
 436  *      @info:unused
 437  *
 438  *      Blank the screen if blank_mode != 0, else unblank.
 439  *      Implements VESA suspend and powerdown modes on hardware that supports
 440  *      disabling hsync/vsync:
 441  *              @blank_mode == 2 means suspend vsync,
 442  *              @blank_mode == 3 means suspend hsync,
 443  *              @blank_mode == 4 means powerdown.
 444  */
 445
 446 static int hgafb_blank(int blank_mode, struct fb_info *info)
 447 {
 448         hga_blank(blank_mode);
 449         return 0;
 450 }
 451
 452 /*
 453  * Accel functions
 454  */
 455 #ifdef CONFIG_FB_HGA_ACCEL
 456 static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 457 {
 458         u_int rows, y;
 459         u8 __iomem *dest;
 460
 461         y = rect->dy;
 462
 463         for (rows = rect->height; rows--; y++) {
 464                 dest = rowaddr(info, y) + (rect->dx >> 3);
 465                 switch (rect->rop) {
 466                 case ROP_COPY:
 467                         //fb_memset(dest, rect->color, (rect->width >> 3));
 468                         break;
 469                 case ROP_XOR:
 470                         fb_writeb(~(fb_readb(dest)), dest);
 471                         break;
 472                 }
 473         }
 474 }
 475
 476 static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 477 {
 478         u_int rows, y1, y2;
 479         u8 __iomem *src;
 480         u8 __iomem *dest;
 481
 482         if (area->dy <= area->sy) {
 483                 y1 = area->sy;
 484                 y2 = area->dy;
 485
 486                 for (rows = area->height; rows--; ) {
 487                         src = rowaddr(info, y1) + (area->sx >> 3);
 488                         dest = rowaddr(info, y2) + (area->dx >> 3);
 489                         //fb_memmove(dest, src, (area->width >> 3));
 490                         y1++;
 491                         y2++;
 492                 }
 493         } else {
 494                 y1 = area->sy + area->height - 1;
 495                 y2 = area->dy + area->height - 1;
 496
 497                 for (rows = area->height; rows--;) {
 498                         src = rowaddr(info, y1) + (area->sx >> 3);
 499                         dest = rowaddr(info, y2) + (area->dx >> 3);
 500                         //fb_memmove(dest, src, (area->width >> 3));
 501                         y1--;
 502                         y2--;
 503                 }
 504         }
 505 }
 506
 507 static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image)
 508 {
 509         u8 __iomem *dest;
 510         u8 *cdat = (u8 *) image->data;
 511         u_int rows, y = image->dy;
 512         u8 d;
 513
 514         for (rows = image->height; rows--; y++) {
 515                 d = *cdat++;
 516                 dest = rowaddr(info, y) + (image->dx >> 3);
 517                 fb_writeb(d, dest);
 518         }
 519 }
 520 #else /* !CONFIG_FB_HGA_ACCEL */
 521 #define hgafb_fillrect cfb_fillrect
 522 #define hgafb_copyarea cfb_copyarea
 523 #define hgafb_imageblit cfb_imageblit
 524 #endif /* CONFIG_FB_HGA_ACCEL */
 525
 526
 527 static struct fb_ops hgafb_ops = {
 528         .owner          = THIS_MODULE,
 529         .fb_open        = hgafb_open,
 530         .fb_release     = hgafb_release,
 531         .fb_setcolreg   = hgafb_setcolreg,
 532         .fb_pan_display = hgafb_pan_display,
 533         .fb_blank       = hgafb_blank,
 534         .fb_fillrect    = hgafb_fillrect,
 535         .fb_copyarea    = hgafb_copyarea,
 536         .fb_imageblit   = hgafb_imageblit,
 537 };
 538
 539 /* ------------------------------------------------------------------------- *
 540  *
 541  * Functions in fb_info
 542  *
 543  * ------------------------------------------------------------------------- */
 544
 545 /* ------------------------------------------------------------------------- */
 546
 547         /*
 548          *  Initialization
 549          */
 550
 551 static int __init hgafb_probe(struct device *device)
 552 {
 553         struct fb_info *info;
 554
 555         if (! hga_card_detect()) {
 556                 printk(KERN_INFO "hgafb: HGA card not detected.\n");
 557                 if (hga_vram)
 558                         iounmap(hga_vram);
 559                 return -EINVAL;
 560         }
 561
 562         printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n",
 563                 hga_type_name, hga_vram_len/1024);
 564
 565         info = framebuffer_alloc(0, NULL);
 566         if (!info) {
 567                 iounmap(hga_vram);
 568                 return -ENOMEM;
 569         }
 570
 571         hga_fix.smem_start = (unsigned long)hga_vram;
 572         hga_fix.smem_len = hga_vram_len;
 573
 574         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 575         info->var = hga_default_var;
 576         info->fix = hga_fix;
 577         info->monspecs.hfmin = 0;
 578         info->monspecs.hfmax = 0;
 579         info->monspecs.vfmin = 10000;
 580         info->monspecs.vfmax = 10000;
 581         info->monspecs.dpms = 0;
 582         info->fbops = &hgafb_ops;
 583         info->screen_base = hga_vram;
 584
 585         if (register_framebuffer(info) < 0) {
 586                 framebuffer_release(info);
 587                 iounmap(hga_vram);
 588                 return -EINVAL;
 589         }
 590
 591         printk(KERN_INFO "fb%d: %s frame buffer device\n",
 592                info->node, info->fix.id);
 593         dev_set_drvdata(device, info);
 594         return 0;
 595 }
 596
 597 static int hgafb_remove(struct device *device)
 598 {
 599         struct fb_info *info = dev_get_drvdata(device);
 600
 601         hga_txt_mode();
 602         hga_clear_screen();
 603
 604         if (info) {
 605                 unregister_framebuffer(info);
 606                 framebuffer_release(info);
 607         }
 608
 609         iounmap(hga_vram);
 610
 611         if (release_io_ports)
 612                 release_region(0x3b0, 12);
 613
 614         if (release_io_port)
 615                 release_region(0x3bf, 1);
 616
 617         return 0;
 618 }
 619
 620 static struct device_driver hgafb_driver = {
 621         .name = "hgafb",
 622         .bus  = &platform_bus_type,
 623         .probe = hgafb_probe,
 624         .remove = hgafb_remove,
 625 };
 626
 627 static struct platform_device hgafb_device = {
 628         .name = "hgafb",
 629 };
 630
 631 static int __init hgafb_init(void)
 632 {
 633         int ret;
 634
 635         if (fb_get_options("hgafb", NULL))
 636                 return -ENODEV;
 637
 638         ret = driver_register(&hgafb_driver);
 639
 640         if (!ret) {
 641                 ret = platform_device_register(&hgafb_device);
 642                 if (ret)
 643                         driver_unregister(&hgafb_driver);
 644         }
 645
 646         return ret;
 647 }
 648
 649 static void __exit hgafb_exit(void)
 650 {
 651         platform_device_unregister(&hgafb_device);
 652         driver_unregister(&hgafb_driver);
 653 }
 654
 655 /* -------------------------------------------------------------------------
 656  *
 657  *  Modularization
 658  *
 659  * ------------------------------------------------------------------------- */
 660
 661 MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)");
 662 MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor");
 663 MODULE_LICENSE("GPL");
 664
 665 module_param(nologo, bool, 0);
 666 MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)");
 667 module_init(hgafb_init);
 668 module_exit(hgafb_exit);