drivers/video/fbdev/hgafb.c

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

DEFINITIONS
