drivers/video/asiliantfb.c

   1 /*
   2  * drivers/video/asiliantfb.c
   3  *  frame buffer driver for Asiliant 69000 chip
   4  *  Copyright (C) 2001-2003 Saito.K & Jeanne
   5  *
   6  *  from driver/video/chipsfb.c and,
   7  *
   8  *  drivers/video/asiliantfb.c -- frame buffer device for
   9  *  Asiliant 69030 chip (formerly Intel, formerly Chips & Technologies)
  10  *  Author: apc@agelectronics.co.uk
  11  *  Copyright (C) 2000 AG Electronics
  12  *  Note: the data sheets don't seem to be available from Asiliant.
  13  *  They are available by searching developer.intel.com, but are not otherwise
  14  *  linked to.
  15  *
  16  *  This driver should be portable with minimal effort to the 69000 display
  17  *  chip, and to the twin-display mode of the 69030.
  18  *  Contains code from Thomas Hhenleitner <th@visuelle-maschinen.de> (thanks)
  19  *
  20  *  Derived from the CT65550 driver chipsfb.c:
  21  *  Copyright (C) 1998 Paul Mackerras
  22  *  ...which was derived from the Powermac "chips" driver:
  23  *  Copyright (C) 1997 Fabio Riccardi.
  24  *  And from the frame buffer device for Open Firmware-initialized devices:
  25  *  Copyright (C) 1997 Geert Uytterhoeven.
  26  *
  27  *  This file is subject to the terms and conditions of the GNU General Public
  28  *  License. See the file COPYING in the main directory of this archive for
  29  *  more details.
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/kernel.h>
  34 #include <linux/errno.h>
  35 #include <linux/string.h>
  36 #include <linux/mm.h>
  37 #include <linux/vmalloc.h>
  38 #include <linux/delay.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/fb.h>
  41 #include <linux/init.h>
  42 #include <linux/pci.h>
  43 #include <asm/io.h>
  44
  45 /* Built in clock of the 69030 */
  46 static const unsigned Fref = 14318180;
  47
  48 #define mmio_base (p->screen_base + 0x400000)
  49
  50 #define mm_write_ind(num, val, ap, dp)  do { \
  51         writeb((num), mmio_base + (ap)); writeb((val), mmio_base + (dp)); \
  52 } while (0)
  53
  54 static void mm_write_xr(struct fb_info *p, u8 reg, u8 data)
  55 {
  56         mm_write_ind(reg, data, 0x7ac, 0x7ad);
  57 }
  58 #define write_xr(num, val)      mm_write_xr(p, num, val)
  59
  60 static void mm_write_fr(struct fb_info *p, u8 reg, u8 data)
  61 {
  62         mm_write_ind(reg, data, 0x7a0, 0x7a1);
  63 }
  64 #define write_fr(num, val)      mm_write_fr(p, num, val)
  65
  66 static void mm_write_cr(struct fb_info *p, u8 reg, u8 data)
  67 {
  68         mm_write_ind(reg, data, 0x7a8, 0x7a9);
  69 }
  70 #define write_cr(num, val)      mm_write_cr(p, num, val)
  71
  72 static void mm_write_gr(struct fb_info *p, u8 reg, u8 data)
  73 {
  74         mm_write_ind(reg, data, 0x79c, 0x79d);
  75 }
  76 #define write_gr(num, val)      mm_write_gr(p, num, val)
  77
  78 static void mm_write_sr(struct fb_info *p, u8 reg, u8 data)
  79 {
  80         mm_write_ind(reg, data, 0x788, 0x789);
  81 }
  82 #define write_sr(num, val)      mm_write_sr(p, num, val)
  83
  84 static void mm_write_ar(struct fb_info *p, u8 reg, u8 data)
  85 {
  86         readb(mmio_base + 0x7b4);
  87         mm_write_ind(reg, data, 0x780, 0x780);
  88 }
  89 #define write_ar(num, val)      mm_write_ar(p, num, val)
  90
  91 static int asiliantfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
  92 static int asiliantfb_check_var(struct fb_var_screeninfo *var,
  93                                 struct fb_info *info);
  94 static int asiliantfb_set_par(struct fb_info *info);
  95 static int asiliantfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  96                                 u_int transp, struct fb_info *info);
  97
  98 static struct fb_ops asiliantfb_ops = {
  99         .owner          = THIS_MODULE,
 100         .fb_check_var   = asiliantfb_check_var,
 101         .fb_set_par     = asiliantfb_set_par,
 102         .fb_setcolreg   = asiliantfb_setcolreg,
 103         .fb_fillrect    = cfb_fillrect,
 104         .fb_copyarea    = cfb_copyarea,
 105         .fb_imageblit   = cfb_imageblit,
 106 };
 107
 108 /* Calculate the ratios for the dot clocks without using a single long long
 109  * value */
 110 static void asiliant_calc_dclk2(u32 *ppixclock, u8 *dclk2_m, u8 *dclk2_n, u8 *dclk2_div)
 111 {
 112         unsigned pixclock = *ppixclock;
 113         unsigned Ftarget = 1000000 * (1000000 / pixclock);
 114         unsigned n;
 115         unsigned best_error = 0xffffffff;
 116         unsigned best_m = 0xffffffff,
 117                  best_n = 0xffffffff;
 118         unsigned ratio;
 119         unsigned remainder;
 120         unsigned char divisor = 0;
 121
 122         /* Calculate the frequency required. This is hard enough. */
 123         ratio = 1000000 / pixclock;
 124         remainder = 1000000 % pixclock;
 125         Ftarget = 1000000 * ratio + (1000000 * remainder) / pixclock;
 126
 127         while (Ftarget < 100000000) {
 128                 divisor += 0x10;
 129                 Ftarget <<= 1;
 130         }
 131
 132         ratio = Ftarget / Fref;
 133         remainder = Ftarget % Fref;
 134
 135         /* This expresses the constraint that 150kHz <= Fref/n <= 5Mhz,
 136          * together with 3 <= n <= 257. */
 137         for (n = 3; n <= 257; n++) {
 138                 unsigned m = n * ratio + (n * remainder) / Fref;
 139
 140                 /* 3 <= m <= 257 */
 141                 if (m >= 3 && m <= 257) {
 142                         unsigned new_error = Ftarget * n >= Fref * m ?
 143                                                ((Ftarget * n) - (Fref * m)) : ((Fref * m) - (Ftarget * n));
 144                         if (new_error < best_error) {
 145                                 best_n = n;
 146                                 best_m = m;
 147                                 best_error = new_error;
 148                         }
 149                 }
 150                 /* But if VLD = 4, then 4m <= 1028 */
 151                 else if (m <= 1028) {
 152                         /* remember there are still only 8-bits of precision in m, so
 153                          * avoid over-optimistic error calculations */
 154                         unsigned new_error = Ftarget * n >= Fref * (m & ~3) ?
 155                                                ((Ftarget * n) - (Fref * (m & ~3))) : ((Fref * (m & ~3)) - (Ftarget * n));
 156                         if (new_error < best_error) {
 157                                 best_n = n;
 158                                 best_m = m;
 159                                 best_error = new_error;
 160                         }
 161                 }
 162         }
 163         if (best_m > 257)
 164                 best_m >>= 2;   /* divide m by 4, and leave VCO loop divide at 4 */
 165         else
 166                 divisor |= 4;   /* or set VCO loop divide to 1 */
 167         *dclk2_m = best_m - 2;
 168         *dclk2_n = best_n - 2;
 169         *dclk2_div = divisor;
 170         *ppixclock = pixclock;
 171         return;
 172 }
 173
 174 static void asiliant_set_timing(struct fb_info *p)
 175 {
 176         unsigned hd = p->var.xres / 8;
 177         unsigned hs = (p->var.xres + p->var.right_margin) / 8;
 178         unsigned he = (p->var.xres + p->var.right_margin + p->var.hsync_len) / 8;
 179         unsigned ht = (p->var.left_margin + p->var.xres + p->var.right_margin + p->var.hsync_len) / 8;
 180         unsigned vd = p->var.yres;
 181         unsigned vs = p->var.yres + p->var.lower_margin;
 182         unsigned ve = p->var.yres + p->var.lower_margin + p->var.vsync_len;
 183         unsigned vt = p->var.upper_margin + p->var.yres + p->var.lower_margin + p->var.vsync_len;
 184         unsigned wd = (p->var.xres_virtual * ((p->var.bits_per_pixel+7)/8)) / 8;
 185
 186         if ((p->var.xres == 640) && (p->var.yres == 480) && (p->var.pixclock == 39722)) {
 187           write_fr(0x01, 0x02);  /* LCD */
 188         } else {
 189           write_fr(0x01, 0x01);  /* CRT */
 190         }
 191
 192         write_cr(0x11, (ve - 1) & 0x0f);
 193         write_cr(0x00, (ht - 5) & 0xff);
 194         write_cr(0x01, hd - 1);
 195         write_cr(0x02, hd);
 196         write_cr(0x03, ((ht - 1) & 0x1f) | 0x80);
 197         write_cr(0x04, hs);
 198         write_cr(0x05, (((ht - 1) & 0x20) <<2) | (he & 0x1f));
 199         write_cr(0x3c, (ht - 1) & 0xc0);
 200         write_cr(0x06, (vt - 2) & 0xff);
 201         write_cr(0x30, (vt - 2) >> 8);
 202         write_cr(0x07, 0x00);
 203         write_cr(0x08, 0x00);
 204         write_cr(0x09, 0x00);
 205         write_cr(0x10, (vs - 1) & 0xff);
 206         write_cr(0x32, ((vs - 1) >> 8) & 0xf);
 207         write_cr(0x11, ((ve - 1) & 0x0f) | 0x80);
 208         write_cr(0x12, (vd - 1) & 0xff);
 209         write_cr(0x31, ((vd - 1) & 0xf00) >> 8);
 210         write_cr(0x13, wd & 0xff);
 211         write_cr(0x41, (wd & 0xf00) >> 8);
 212         write_cr(0x15, (vs - 1) & 0xff);
 213         write_cr(0x33, ((vs - 1) >> 8) & 0xf);
 214         write_cr(0x38, ((ht - 5) & 0x100) >> 8);
 215         write_cr(0x16, (vt - 1) & 0xff);
 216         write_cr(0x18, 0x00);
 217
 218         if (p->var.xres == 640) {
 219           writeb(0xc7, mmio_base + 0x784);      /* set misc output reg */
 220         } else {
 221           writeb(0x07, mmio_base + 0x784);      /* set misc output reg */
 222         }
 223 }
 224
 225 static int asiliantfb_check_var(struct fb_var_screeninfo *var,
 226                              struct fb_info *p)
 227 {
 228         unsigned long Ftarget, ratio, remainder;
 229
 230         ratio = 1000000 / var->pixclock;
 231         remainder = 1000000 % var->pixclock;
 232         Ftarget = 1000000 * ratio + (1000000 * remainder) / var->pixclock;
 233
 234         /* First check the constraint that the maximum post-VCO divisor is 32,
 235          * and the maximum Fvco is 220MHz */
 236         if (Ftarget > 220000000 || Ftarget < 3125000) {
 237                 printk(KERN_ERR "asiliantfb dotclock must be between 3.125 and 220MHz\n");
 238                 return -ENXIO;
 239         }
 240         var->xres_virtual = var->xres;
 241         var->yres_virtual = var->yres;
 242
 243         if (var->bits_per_pixel == 24) {
 244                 var->red.offset = 16;
 245                 var->green.offset = 8;
 246                 var->blue.offset = 0;
 247                 var->red.length = var->blue.length = var->green.length = 8;
 248         } else if (var->bits_per_pixel == 16) {
 249                 switch (var->red.offset) {
 250                         case 11:
 251                                 var->green.length = 6;
 252                                 break;
 253                         case 10:
 254                                 var->green.length = 5;
 255                                 break;
 256                         default:
 257                                 return -EINVAL;
 258                 }
 259                 var->green.offset = 5;
 260                 var->blue.offset = 0;
 261                 var->red.length = var->blue.length = 5;
 262         } else if (var->bits_per_pixel == 8) {
 263                 var->red.offset = var->green.offset = var->blue.offset = 0;
 264                 var->red.length = var->green.length = var->blue.length = 8;
 265         }
 266         return 0;
 267 }
 268
 269 static int asiliantfb_set_par(struct fb_info *p)
 270 {
 271         u8 dclk2_m;             /* Holds m-2 value for register */
 272         u8 dclk2_n;             /* Holds n-2 value for register */
 273         u8 dclk2_div;           /* Holds divisor bitmask */
 274
 275         /* Set pixclock */
 276         asiliant_calc_dclk2(&p->var.pixclock, &dclk2_m, &dclk2_n, &dclk2_div);
 277
 278         /* Set color depth */
 279         if (p->var.bits_per_pixel == 24) {
 280                 write_xr(0x81, 0x16);   /* 24 bit packed color mode */
 281                 write_xr(0x82, 0x00);   /* Disable palettes */
 282                 write_xr(0x20, 0x20);   /* 24 bit blitter mode */
 283         } else if (p->var.bits_per_pixel == 16) {
 284                 if (p->var.red.offset == 11)
 285                         write_xr(0x81, 0x15);   /* 16 bit color mode */
 286                 else
 287                         write_xr(0x81, 0x14);   /* 15 bit color mode */
 288                 write_xr(0x82, 0x00);   /* Disable palettes */
 289                 write_xr(0x20, 0x10);   /* 16 bit blitter mode */
 290         } else if (p->var.bits_per_pixel == 8) {
 291                 write_xr(0x0a, 0x02);   /* Linear */
 292                 write_xr(0x81, 0x12);   /* 8 bit color mode */
 293                 write_xr(0x82, 0x00);   /* Graphics gamma enable */
 294                 write_xr(0x20, 0x00);   /* 8 bit blitter mode */
 295         }
 296         p->fix.line_length = p->var.xres * (p->var.bits_per_pixel >> 3);
 297         p->fix.visual = (p->var.bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 298         write_xr(0xc4, dclk2_m);
 299         write_xr(0xc5, dclk2_n);
 300         write_xr(0xc7, dclk2_div);
 301         /* Set up the CR registers */
 302         asiliant_set_timing(p);
 303         return 0;
 304 }
 305
 306 static int asiliantfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 307                              u_int transp, struct fb_info *p)
 308 {
 309         if (regno > 255)
 310                 return 1;
 311         red >>= 8;
 312         green >>= 8;
 313         blue >>= 8;
 314
 315         /* Set hardware palete */
 316         writeb(regno, mmio_base + 0x790);
 317         udelay(1);
 318         writeb(red, mmio_base + 0x791);
 319         writeb(green, mmio_base + 0x791);
 320         writeb(blue, mmio_base + 0x791);
 321
 322         if (regno < 16) {
 323                 switch(p->var.red.offset) {
 324                 case 10: /* RGB 555 */
 325                         ((u32 *)(p->pseudo_palette))[regno] =
 326                                 ((red & 0xf8) << 7) |
 327                                 ((green & 0xf8) << 2) |
 328                                 ((blue & 0xf8) >> 3);
 329                         break;
 330                 case 11: /* RGB 565 */
 331                         ((u32 *)(p->pseudo_palette))[regno] =
 332                                 ((red & 0xf8) << 8) |
 333                                 ((green & 0xfc) << 3) |
 334                                 ((blue & 0xf8) >> 3);
 335                         break;
 336                 case 16: /* RGB 888 */
 337                         ((u32 *)(p->pseudo_palette))[regno] =
 338                                 (red << 16)  |
 339                                 (green << 8) |
 340                                 (blue);
 341                         break;
 342                 }
 343         }
 344
 345         return 0;
 346 }
 347
 348 struct chips_init_reg {
 349         unsigned char addr;
 350         unsigned char data;
 351 };
 352
 353 static struct chips_init_reg chips_init_sr[] =
 354 {
 355         {0x00, 0x03},           /* Reset register */
 356         {0x01, 0x01},           /* Clocking mode */
 357         {0x02, 0x0f},           /* Plane mask */
 358         {0x04, 0x0e}            /* Memory mode */
 359 };
 360
 361 static struct chips_init_reg chips_init_gr[] =
 362 {
 363         {0x03, 0x00},           /* Data rotate */
 364         {0x05, 0x00},           /* Graphics mode */
 365         {0x06, 0x01},           /* Miscellaneous */
 366         {0x08, 0x00}            /* Bit mask */
 367 };
 368
 369 static struct chips_init_reg chips_init_ar[] =
 370 {
 371         {0x10, 0x01},           /* Mode control */
 372         {0x11, 0x00},           /* Overscan */
 373         {0x12, 0x0f},           /* Memory plane enable */
 374         {0x13, 0x00}            /* Horizontal pixel panning */
 375 };
 376
 377 static struct chips_init_reg chips_init_cr[] =
 378 {
 379         {0x0c, 0x00},           /* Start address high */
 380         {0x0d, 0x00},           /* Start address low */
 381         {0x40, 0x00},           /* Extended Start Address */
 382         {0x41, 0x00},           /* Extended Start Address */
 383         {0x14, 0x00},           /* Underline location */
 384         {0x17, 0xe3},           /* CRT mode control */
 385         {0x70, 0x00}            /* Interlace control */
 386 };
 387
 388
 389 static struct chips_init_reg chips_init_fr[] =
 390 {
 391         {0x01, 0x02},
 392         {0x03, 0x08},
 393         {0x08, 0xcc},
 394         {0x0a, 0x08},
 395         {0x18, 0x00},
 396         {0x1e, 0x80},
 397         {0x40, 0x83},
 398         {0x41, 0x00},
 399         {0x48, 0x13},
 400         {0x4d, 0x60},
 401         {0x4e, 0x0f},
 402
 403         {0x0b, 0x01},
 404
 405         {0x21, 0x51},
 406         {0x22, 0x1d},
 407         {0x23, 0x5f},
 408         {0x20, 0x4f},
 409         {0x34, 0x00},
 410         {0x24, 0x51},
 411         {0x25, 0x00},
 412         {0x27, 0x0b},
 413         {0x26, 0x00},
 414         {0x37, 0x80},
 415         {0x33, 0x0b},
 416         {0x35, 0x11},
 417         {0x36, 0x02},
 418         {0x31, 0xea},
 419         {0x32, 0x0c},
 420         {0x30, 0xdf},
 421         {0x10, 0x0c},
 422         {0x11, 0xe0},
 423         {0x12, 0x50},
 424         {0x13, 0x00},
 425         {0x16, 0x03},
 426         {0x17, 0xbd},
 427         {0x1a, 0x00},
 428 };
 429
 430
 431 static struct chips_init_reg chips_init_xr[] =
 432 {
 433         {0xce, 0x00},           /* set default memory clock */
 434         {0xcc, 200 },           /* MCLK ratio M */
 435         {0xcd, 18  },           /* MCLK ratio N */
 436         {0xce, 0x90},           /* MCLK divisor = 2 */
 437
 438         {0xc4, 209 },
 439         {0xc5, 118 },
 440         {0xc7, 32  },
 441         {0xcf, 0x06},
 442         {0x09, 0x01},           /* IO Control - CRT controller extensions */
 443         {0x0a, 0x02},           /* Frame buffer mapping */
 444         {0x0b, 0x01},           /* PCI burst write */
 445         {0x40, 0x03},           /* Memory access control */
 446         {0x80, 0x82},           /* Pixel pipeline configuration 0 */
 447         {0x81, 0x12},           /* Pixel pipeline configuration 1 */
 448         {0x82, 0x08},           /* Pixel pipeline configuration 2 */
 449
 450         {0xd0, 0x0f},
 451         {0xd1, 0x01},
 452 };
 453
 454 static void __devinit chips_hw_init(struct fb_info *p)
 455 {
 456         int i;
 457
 458         for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i)
 459                 write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
 460         write_xr(0x81, 0x12);
 461         write_xr(0x82, 0x08);
 462         write_xr(0x20, 0x00);
 463         for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i)
 464                 write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
 465         for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i)
 466                 write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
 467         for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i)
 468                 write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
 469         /* Enable video output in attribute index register */
 470         writeb(0x20, mmio_base + 0x780);
 471         for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i)
 472                 write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
 473         for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i)
 474                 write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
 475 }
 476
 477 static struct fb_fix_screeninfo asiliantfb_fix __devinitdata = {
 478         .id =           "Asiliant 69000",
 479         .type =         FB_TYPE_PACKED_PIXELS,
 480         .visual =       FB_VISUAL_PSEUDOCOLOR,
 481         .accel =        FB_ACCEL_NONE,
 482         .line_length =  640,
 483         .smem_len =     0x200000,       /* 2MB */
 484 };
 485
 486 static struct fb_var_screeninfo asiliantfb_var __devinitdata = {
 487         .xres           = 640,
 488         .yres           = 480,
 489         .xres_virtual   = 640,
 490         .yres_virtual   = 480,
 491         .bits_per_pixel = 8,
 492         .red            = { .length = 8 },
 493         .green          = { .length = 8 },
 494         .blue           = { .length = 8 },
 495         .height         = -1,
 496         .width          = -1,
 497         .vmode          = FB_VMODE_NONINTERLACED,
 498         .pixclock       = 39722,
 499         .left_margin    = 48,
 500         .right_margin   = 16,
 501         .upper_margin   = 33,
 502         .lower_margin   = 10,
 503         .hsync_len      = 96,
 504         .vsync_len      = 2,
 505 };
 506
 507 static int __devinit init_asiliant(struct fb_info *p, unsigned long addr)
 508 {
 509         int err;
 510
 511         p->fix                  = asiliantfb_fix;
 512         p->fix.smem_start       = addr;
 513         p->var                  = asiliantfb_var;
 514         p->fbops                = &asiliantfb_ops;
 515         p->flags                = FBINFO_DEFAULT;
 516
 517         err = fb_alloc_cmap(&p->cmap, 256, 0);
 518         if (err) {
 519                 printk(KERN_ERR "C&T 69000 fb failed to alloc cmap memory\n");
 520                 return err;
 521         }
 522
 523         err = register_framebuffer(p);
 524         if (err < 0) {
 525                 printk(KERN_ERR "C&T 69000 framebuffer failed to register\n");
 526                 fb_dealloc_cmap(&p->cmap);
 527                 return err;
 528         }
 529
 530         printk(KERN_INFO "fb%d: Asiliant 69000 frame buffer (%dK RAM detected)\n",
 531                 p->node, p->fix.smem_len / 1024);
 532
 533         writeb(0xff, mmio_base + 0x78c);
 534         chips_hw_init(p);
 535         return 0;
 536 }
 537
 538 static int __devinit
 539 asiliantfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
 540 {
 541         unsigned long addr, size;
 542         struct fb_info *p;
 543         int err;
 544
 545         if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
 546                 return -ENODEV;
 547         addr = pci_resource_start(dp, 0);
 548         size = pci_resource_len(dp, 0);
 549         if (addr == 0)
 550                 return -ENODEV;
 551         if (!request_mem_region(addr, size, "asiliantfb"))
 552                 return -EBUSY;
 553
 554         p = framebuffer_alloc(sizeof(u32) * 16, &dp->dev);
 555         if (!p) {
 556                 release_mem_region(addr, size);
 557                 return -ENOMEM;
 558         }
 559         p->pseudo_palette = p->par;
 560         p->par = NULL;
 561
 562         p->screen_base = ioremap(addr, 0x800000);
 563         if (p->screen_base == NULL) {
 564                 release_mem_region(addr, size);
 565                 framebuffer_release(p);
 566                 return -ENOMEM;
 567         }
 568
 569         pci_write_config_dword(dp, 4, 0x02800083);
 570         writeb(3, p->screen_base + 0x400784);
 571
 572         err = init_asiliant(p, addr);
 573         if (err) {
 574                 iounmap(p->screen_base);
 575                 release_mem_region(addr, size);
 576                 framebuffer_release(p);
 577                 return err;
 578         }
 579
 580         pci_set_drvdata(dp, p);
 581         return 0;
 582 }
 583
 584 static void __devexit asiliantfb_remove(struct pci_dev *dp)
 585 {
 586         struct fb_info *p = pci_get_drvdata(dp);
 587
 588         unregister_framebuffer(p);
 589         fb_dealloc_cmap(&p->cmap);
 590         iounmap(p->screen_base);
 591         release_mem_region(pci_resource_start(dp, 0), pci_resource_len(dp, 0));
 592         pci_set_drvdata(dp, NULL);
 593         framebuffer_release(p);
 594 }
 595
 596 static struct pci_device_id asiliantfb_pci_tbl[] __devinitdata = {
 597         { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_69000, PCI_ANY_ID, PCI_ANY_ID },
 598         { 0 }
 599 };
 600
 601 MODULE_DEVICE_TABLE(pci, asiliantfb_pci_tbl);
 602
 603 static struct pci_driver asiliantfb_driver = {
 604         .name =         "asiliantfb",
 605         .id_table =     asiliantfb_pci_tbl,
 606         .probe =        asiliantfb_pci_init,
 607         .remove =       __devexit_p(asiliantfb_remove),
 608 };
 609
 610 static int __init asiliantfb_init(void)
 611 {
 612         if (fb_get_options("asiliantfb", NULL))
 613                 return -ENODEV;
 614
 615         return pci_register_driver(&asiliantfb_driver);
 616 }
 617
 618 module_init(asiliantfb_init);
 619
 620 static void __exit asiliantfb_exit(void)
 621 {
 622         pci_unregister_driver(&asiliantfb_driver);
 623 }
 624
 625 MODULE_LICENSE("GPL");