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