git.oblomov.eu Git - linux-2.6/blob - drivers/video/matrox/matroxfb_crtc2.c

   1 /*
   2  *
   3  * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
   4  *
   5  * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
   6  *
   7  * Portions Copyright (c) 2001 Matrox Graphics Inc.
   8  *
   9  * Version: 1.65 2002/08/14
  10  *
  11  */
  12
  13 #include "matroxfb_maven.h"
  14 #include "matroxfb_crtc2.h"
  15 #include "matroxfb_misc.h"
  16 #include "matroxfb_DAC1064.h"
  17 #include <linux/matroxfb.h>
  18 #include <asm/uaccess.h>
  19
  20 /* **************************************************** */
  21
  22 static int mem = 8192;
  23
  24 module_param(mem, int, 0);
  25 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
  26
  27 /* **************************************************** */
  28
  29 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
  30                 unsigned blue, unsigned transp, struct fb_info* info) {
  31         u_int32_t col;
  32 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
  33
  34         if (regno >= 16)
  35                 return 1;
  36         if (m2info->fbcon.var.grayscale) {
  37                 /* gray = 0.30*R + 0.59*G + 0.11*B */
  38                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
  39         }
  40         red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
  41         green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
  42         blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
  43         transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
  44
  45         col = (red << m2info->fbcon.var.red.offset)     |
  46               (green << m2info->fbcon.var.green.offset) |
  47               (blue << m2info->fbcon.var.blue.offset)   |
  48               (transp << m2info->fbcon.var.transp.offset);
  49
  50         switch (m2info->fbcon.var.bits_per_pixel) {
  51                 case 16:
  52                         m2info->cmap[regno] = col | (col << 16);
  53                         break;
  54                 case 32:
  55                         m2info->cmap[regno] = col;
  56                         break;
  57         }
  58         return 0;
  59 #undef m2info
  60 }
  61
  62 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
  63                 struct my_timming* mt,
  64                 int mode,
  65                 unsigned int pos) {
  66         u_int32_t tmp;
  67         u_int32_t datactl;
  68         MINFO_FROM(m2info->primary_dev);
  69
  70         switch (mode) {
  71                 case 15:
  72                         tmp = 0x00200000;
  73                         break;
  74                 case 16:
  75                         tmp = 0x00400000;
  76                         break;
  77 /*              case 32: */
  78                 default:
  79                         tmp = 0x00800000;
  80                         break;
  81         }
  82         tmp |= 0x00000001;      /* enable CRTC2 */
  83         datactl = 0;
  84         if (ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_CRTC2) {
  85                 if (ACCESS_FBINFO(devflags.g450dac)) {
  86                         tmp |= 0x00000006; /* source from secondary pixel PLL */
  87                         /* no vidrst when in monitor mode */
  88                         if (ACCESS_FBINFO(outputs[1]).mode != MATROXFB_OUTPUT_MODE_MONITOR) {
  89                                 tmp |=  0xC0001000; /* Enable H/V vidrst */
  90                         }
  91                 } else {
  92                         tmp |= 0x00000002; /* source from VDOCLK */
  93                         tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
  94                         /* MGA TVO is our clock source */
  95                 }
  96         } else if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
  97                 tmp |= 0x00000004; /* source from pixclock */
  98                 /* PIXPLL is our clock source */
  99         }
 100         if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
 101                 tmp |= 0x00100000;      /* connect CRTC2 to DAC */
 102         }
 103         if (mt->interlaced) {
 104                 tmp |= 0x02000000;      /* interlaced, second field is bigger, as G450 apparently ignores it */
 105                 mt->VDisplay >>= 1;
 106                 mt->VSyncStart >>= 1;
 107                 mt->VSyncEnd >>= 1;
 108                 mt->VTotal >>= 1;
 109         }
 110         if ((mt->HTotal & 7) == 2) {
 111                 datactl |= 0x00000010;
 112                 mt->HTotal &= ~7;
 113         }
 114         tmp |= 0x10000000;      /* 0x10000000 is VIDRST polarity */
 115         mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
 116         mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
 117         mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
 118         mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
 119         mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart));  /* preload */
 120         {
 121                 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
 122                 if (tmp & 0x02000000) {
 123                         /* field #0 is smaller, so... */
 124                         mga_outl(0x3C2C, pos);                  /* field #1 vmemory start */
 125                         mga_outl(0x3C28, pos + linelen);        /* field #0 vmemory start */
 126                         linelen <<= 1;
 127                         m2info->interlaced = 1;
 128                 } else {
 129                         mga_outl(0x3C28, pos);          /* vmemory start */
 130                         m2info->interlaced = 0;
 131                 }
 132                 mga_outl(0x3C40, linelen);
 133         }
 134         mga_outl(0x3C4C, datactl);      /* data control */
 135         if (tmp & 0x02000000) {
 136                 int i;
 137
 138                 mga_outl(0x3C10, tmp & ~0x02000000);
 139                 for (i = 0; i < 2; i++) {
 140                         unsigned int nl;
 141                         unsigned int lastl = 0;
 142
 143                         while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
 144                                 lastl = nl;
 145                         }
 146                 }
 147         }
 148         mga_outl(0x3C10, tmp);
 149         ACCESS_FBINFO(hw).crtc2.ctl = tmp;
 150
 151         tmp = mt->VDisplay << 16;       /* line compare */
 152         if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
 153                 tmp |= 0x00000100;
 154         if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
 155                 tmp |= 0x00000200;
 156         mga_outl(0x3C44, tmp);
 157 }
 158
 159 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
 160         MINFO_FROM(m2info->primary_dev);
 161
 162         mga_outl(0x3C10, 0x00000004);   /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
 163         ACCESS_FBINFO(hw).crtc2.ctl = 0x00000004;
 164 }
 165
 166 static void matroxfb_dh_cfbX_init(struct matroxfb_dh_fb_info* m2info) {
 167         /* no acceleration for secondary head... */
 168         m2info->cmap[16] = 0xFFFFFFFF;
 169 }
 170
 171 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
 172                 struct fb_var_screeninfo* var) {
 173         unsigned int pos;
 174         unsigned int linelen;
 175         unsigned int pixelsize;
 176         MINFO_FROM(m2info->primary_dev);
 177
 178         m2info->fbcon.var.xoffset = var->xoffset;
 179         m2info->fbcon.var.yoffset = var->yoffset;
 180         pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
 181         linelen = m2info->fbcon.var.xres_virtual * pixelsize;
 182         pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
 183         pos += m2info->video.offbase;
 184         if (m2info->interlaced) {
 185                 mga_outl(0x3C2C, pos);
 186                 mga_outl(0x3C28, pos + linelen);
 187         } else {
 188                 mga_outl(0x3C28, pos);
 189         }
 190 }
 191
 192 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
 193                 struct fb_var_screeninfo* var,
 194                 int *visual,
 195                 int *video_cmap_len,
 196                 int *mode) {
 197         unsigned int mask;
 198         unsigned int memlen;
 199         unsigned int vramlen;
 200
 201         switch (var->bits_per_pixel) {
 202                 case 16:        mask = 0x1F;
 203                                 break;
 204                 case 32:        mask = 0x0F;
 205                                 break;
 206                 default:        return -EINVAL;
 207         }
 208         vramlen = m2info->video.len_usable;
 209         if (var->yres_virtual < var->yres)
 210                 var->yres_virtual = var->yres;
 211         if (var->xres_virtual < var->xres)
 212                 var->xres_virtual = var->xres;
 213         var->xres_virtual = (var->xres_virtual + mask) & ~mask;
 214         if (var->yres_virtual > 32767)
 215                 return -EINVAL;
 216         memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
 217         if (memlen > vramlen)
 218                 return -EINVAL;
 219         if (var->xoffset + var->xres > var->xres_virtual)
 220                 var->xoffset = var->xres_virtual - var->xres;
 221         if (var->yoffset + var->yres > var->yres_virtual)
 222                 var->yoffset = var->yres_virtual - var->yres;
 223
 224         var->xres &= ~7;
 225         var->left_margin &= ~7;
 226         var->right_margin &= ~7;
 227         var->hsync_len &= ~7;
 228
 229         *mode = var->bits_per_pixel;
 230         if (var->bits_per_pixel == 16) {
 231                 if (var->green.length == 5) {
 232                         var->red.offset = 10;
 233                         var->red.length = 5;
 234                         var->green.offset = 5;
 235                         var->green.length = 5;
 236                         var->blue.offset = 0;
 237                         var->blue.length = 5;
 238                         var->transp.offset = 15;
 239                         var->transp.length = 1;
 240                         *mode = 15;
 241                 } else {
 242                         var->red.offset = 11;
 243                         var->red.length = 5;
 244                         var->green.offset = 5;
 245                         var->green.length = 6;
 246                         var->blue.offset = 0;
 247                         var->blue.length = 5;
 248                         var->transp.offset = 0;
 249                         var->transp.length = 0;
 250                 }
 251         } else {
 252                         var->red.offset = 16;
 253                         var->red.length = 8;
 254                         var->green.offset = 8;
 255                         var->green.length = 8;
 256                         var->blue.offset = 0;
 257                         var->blue.length = 8;
 258                         var->transp.offset = 24;
 259                         var->transp.length = 8;
 260         }
 261         *visual = FB_VISUAL_TRUECOLOR;
 262         *video_cmap_len = 16;
 263         return 0;
 264 }
 265
 266 static int matroxfb_dh_open(struct fb_info* info, int user) {
 267 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 268         MINFO_FROM(m2info->primary_dev);
 269
 270         if (MINFO) {
 271                 int err;
 272
 273                 if (ACCESS_FBINFO(dead)) {
 274                         return -ENXIO;
 275                 }
 276                 err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
 277                 if (err) {
 278                         return err;
 279                 }
 280         }
 281         return 0;
 282 #undef m2info
 283 }
 284
 285 static int matroxfb_dh_release(struct fb_info* info, int user) {
 286 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 287         int err = 0;
 288         MINFO_FROM(m2info->primary_dev);
 289
 290         if (MINFO) {
 291                 err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
 292         }
 293         return err;
 294 #undef m2info
 295 }
 296
 297 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info) {
 298         struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
 299
 300         strcpy(fix->id, "MATROX DH");
 301
 302         fix->smem_start = m2info->video.base;
 303         fix->smem_len = m2info->video.len_usable;
 304         fix->ypanstep = 1;
 305         fix->ywrapstep = 0;
 306         fix->xpanstep = 8;      /* TBD */
 307         fix->mmio_start = m2info->mmio.base;
 308         fix->mmio_len = m2info->mmio.len;
 309         fix->accel = 0;         /* no accel... */
 310 }
 311
 312 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
 313 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 314         int visual;
 315         int cmap_len;
 316         int mode;
 317
 318         return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
 319 #undef m2info
 320 }
 321
 322 static int matroxfb_dh_set_par(struct fb_info* info) {
 323 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 324         int visual;
 325         int cmap_len;
 326         int mode;
 327         int err;
 328         struct fb_var_screeninfo* var = &info->var;
 329         MINFO_FROM(m2info->primary_dev);
 330
 331         if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
 332                 return err;
 333         /* cmap */
 334         {
 335                 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
 336                 m2info->fbcon.fix.visual = visual;
 337                 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
 338                 m2info->fbcon.fix.type_aux = 0;
 339                 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
 340         }
 341         {
 342                 struct my_timming mt;
 343                 unsigned int pos;
 344                 int out;
 345                 int cnt;
 346
 347                 matroxfb_var2my(&m2info->fbcon.var, &mt);
 348                 mt.crtc = MATROXFB_SRC_CRTC2;
 349                 /* CRTC2 delay */
 350                 mt.delay = 34;
 351
 352                 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
 353                 pos += m2info->video.offbase;
 354                 cnt = 0;
 355                 down_read(&ACCESS_FBINFO(altout).lock);
 356                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 357                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 358                                 cnt++;
 359                                 if (ACCESS_FBINFO(outputs[out]).output->compute) {
 360                                         ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
 361                                 }
 362                         }
 363                 }
 364                 ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
 365                 ACCESS_FBINFO(crtc2).mnp = mt.mnp;
 366                 up_read(&ACCESS_FBINFO(altout).lock);
 367                 if (cnt) {
 368                         matroxfb_dh_restore(m2info, &mt, mode, pos);
 369                 } else {
 370                         matroxfb_dh_disable(m2info);
 371                 }
 372                 DAC1064_global_init(PMINFO2);
 373                 DAC1064_global_restore(PMINFO2);
 374                 down_read(&ACCESS_FBINFO(altout).lock);
 375                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 376                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
 377                             ACCESS_FBINFO(outputs[out]).output->program) {
 378                                 ACCESS_FBINFO(outputs[out]).output->program(ACCESS_FBINFO(outputs[out]).data);
 379                         }
 380                 }
 381                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 382                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
 383                             ACCESS_FBINFO(outputs[out]).output->start) {
 384                                 ACCESS_FBINFO(outputs[out]).output->start(ACCESS_FBINFO(outputs[out]).data);
 385                         }
 386                 }
 387                 up_read(&ACCESS_FBINFO(altout).lock);
 388                 matroxfb_dh_cfbX_init(m2info);
 389         }
 390         m2info->initialized = 1;
 391         return 0;
 392 #undef m2info
 393 }
 394
 395 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
 396 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 397         matroxfb_dh_pan_var(m2info, var);
 398         return 0;
 399 #undef m2info
 400 }
 401
 402 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
 403         MINFO_FROM(m2info->primary_dev);
 404
 405         matroxfb_enable_irq(PMINFO 0);
 406         memset(vblank, 0, sizeof(*vblank));
 407         vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
 408         /* mask out reserved bits + field number (odd/even) */
 409         vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
 410         /* compatibility stuff */
 411         if (vblank->vcount >= m2info->fbcon.var.yres)
 412                 vblank->flags |= FB_VBLANK_VBLANKING;
 413         if (test_bit(0, &ACCESS_FBINFO(irq_flags))) {
 414                 vblank->flags |= FB_VBLANK_HAVE_COUNT;
 415                 /* Only one writer, aligned int value...
 416                    it should work without lock and without atomic_t */
 417                 vblank->count = ACCESS_FBINFO(crtc2).vsync.cnt;
 418         }
 419         return 0;
 420 }
 421
 422 static int matroxfb_dh_ioctl(struct fb_info *info,
 423                 unsigned int cmd,
 424                 unsigned long arg)
 425 {
 426 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 427         MINFO_FROM(m2info->primary_dev);
 428
 429         DBG(__FUNCTION__)
 430
 431         switch (cmd) {
 432                 case FBIOGET_VBLANK:
 433                         {
 434                                 struct fb_vblank vblank;
 435                                 int err;
 436
 437                                 err = matroxfb_dh_get_vblank(m2info, &vblank);
 438                                 if (err)
 439                                         return err;
 440                                 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
 441                                         return -EFAULT;
 442                                 return 0;
 443                         }
 444                 case FBIO_WAITFORVSYNC:
 445                         {
 446                                 u_int32_t crt;
 447
 448                                 if (get_user(crt, (u_int32_t __user *)arg))
 449                                         return -EFAULT;
 450
 451                                 if (crt != 0)
 452                                         return -ENODEV;
 453                                 return matroxfb_wait_for_sync(PMINFO 1);
 454                         }
 455                 case MATROXFB_SET_OUTPUT_MODE:
 456                 case MATROXFB_GET_OUTPUT_MODE:
 457                 case MATROXFB_GET_ALL_OUTPUTS:
 458                         {
 459                                 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(&ACCESS_FBINFO(fbcon), cmd, arg);
 460                         }
 461                 case MATROXFB_SET_OUTPUT_CONNECTION:
 462                         {
 463                                 u_int32_t tmp;
 464                                 int out;
 465                                 int changes;
 466
 467                                 if (get_user(tmp, (u_int32_t __user *)arg))
 468                                         return -EFAULT;
 469                                 for (out = 0; out < 32; out++) {
 470                                         if (tmp & (1 << out)) {
 471                                                 if (out >= MATROXFB_MAX_OUTPUTS)
 472                                                         return -ENXIO;
 473                                                 if (!ACCESS_FBINFO(outputs[out]).output)
 474                                                         return -ENXIO;
 475                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 476                                                         case MATROXFB_SRC_NONE:
 477                                                         case MATROXFB_SRC_CRTC2:
 478                                                                 break;
 479                                                         default:
 480                                                                 return -EBUSY;
 481                                                 }
 482                                         }
 483                                 }
 484                                 if (ACCESS_FBINFO(devflags.panellink)) {
 485                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
 486                                                 return -EINVAL;
 487                                         if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
 488                                                 return -EBUSY;
 489                                 }
 490                                 changes = 0;
 491                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 492                                         if (tmp & (1 << out)) {
 493                                                 if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
 494                                                         changes = 1;
 495                                                         ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
 496                                                 }
 497                                         } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 498                                                 changes = 1;
 499                                                 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
 500                                         }
 501                                 }
 502                                 if (!changes)
 503                                         return 0;
 504                                 matroxfb_dh_set_par(info);
 505                                 return 0;
 506                         }
 507                 case MATROXFB_GET_OUTPUT_CONNECTION:
 508                         {
 509                                 u_int32_t conn = 0;
 510                                 int out;
 511
 512                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 513                                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 514                                                 conn |= 1 << out;
 515                                         }
 516                                 }
 517                                 if (put_user(conn, (u_int32_t __user *)arg))
 518                                         return -EFAULT;
 519                                 return 0;
 520                         }
 521                 case MATROXFB_GET_AVAILABLE_OUTPUTS:
 522                         {
 523                                 u_int32_t tmp = 0;
 524                                 int out;
 525
 526                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 527                                         if (ACCESS_FBINFO(outputs[out]).output) {
 528                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 529                                                         case MATROXFB_SRC_NONE:
 530                                                         case MATROXFB_SRC_CRTC2:
 531                                                                 tmp |= 1 << out;
 532                                                                 break;
 533                                                 }
 534                                         }
 535                                 }
 536                                 if (ACCESS_FBINFO(devflags.panellink)) {
 537                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
 538                                         if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
 539                                                 tmp = 0;
 540                                         }
 541                                 }
 542                                 if (put_user(tmp, (u_int32_t __user *)arg))
 543                                         return -EFAULT;
 544                                 return 0;
 545                         }
 546         }
 547         return -ENOTTY;
 548 #undef m2info
 549 }
 550
 551 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
 552 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 553         switch (blank) {
 554                 case 1:
 555                 case 2:
 556                 case 3:
 557                 case 4:
 558                 default:;
 559         }
 560         /* do something... */
 561         return 0;
 562 #undef m2info
 563 }
 564
 565 static struct fb_ops matroxfb_dh_ops = {
 566         .owner =        THIS_MODULE,
 567         .fb_open =      matroxfb_dh_open,
 568         .fb_release =   matroxfb_dh_release,
 569         .fb_check_var = matroxfb_dh_check_var,
 570         .fb_set_par =   matroxfb_dh_set_par,
 571         .fb_setcolreg = matroxfb_dh_setcolreg,
 572         .fb_pan_display =matroxfb_dh_pan_display,
 573         .fb_blank =     matroxfb_dh_blank,
 574         .fb_ioctl =     matroxfb_dh_ioctl,
 575         .fb_fillrect =  cfb_fillrect,
 576         .fb_copyarea =  cfb_copyarea,
 577         .fb_imageblit = cfb_imageblit,
 578 };
 579
 580 static struct fb_var_screeninfo matroxfb_dh_defined = {
 581                 640,480,640,480,/* W,H, virtual W,H */
 582                 0,0,            /* offset */
 583                 32,             /* depth */
 584                 0,              /* gray */
 585                 {0,0,0},        /* R */
 586                 {0,0,0},        /* G */
 587                 {0,0,0},        /* B */
 588                 {0,0,0},        /* alpha */
 589                 0,              /* nonstd */
 590                 FB_ACTIVATE_NOW,
 591                 -1,-1,          /* display size */
 592                 0,              /* accel flags */
 593                 39721L,48L,16L,33L,10L,
 594                 96L,2,0,        /* no sync info */
 595                 FB_VMODE_NONINTERLACED,
 596                 0, {0,0,0,0,0}
 597 };
 598
 599 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
 600 #define minfo (m2info->primary_dev)
 601         void* oldcrtc2;
 602
 603         m2info->fbcon.fbops = &matroxfb_dh_ops;
 604         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
 605         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
 606                                FBINFO_HWACCEL_YPAN;
 607         m2info->fbcon.pseudo_palette = m2info->cmap;
 608         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
 609
 610         if (mem < 64)
 611                 mem *= 1024;
 612         if (mem < 64*1024)
 613                 mem *= 1024;
 614         mem &= ~0x00000FFF;     /* PAGE_MASK? */
 615         if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
 616                 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
 617         else if (ACCESS_FBINFO(video.len) < mem) {
 618                 return -ENOMEM;
 619         } else { /* check yres on first head... */
 620                 m2info->video.borrowed = mem;
 621                 ACCESS_FBINFO(video.len_usable) -= mem;
 622                 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
 623         }
 624         m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
 625         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
 626         m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
 627         m2info->mmio.base = ACCESS_FBINFO(mmio.base);
 628         m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
 629         m2info->mmio.len = ACCESS_FBINFO(mmio.len);
 630
 631         matroxfb_dh_init_fix(m2info);
 632         if (register_framebuffer(&m2info->fbcon)) {
 633                 return -ENXIO;
 634         }
 635         if (!m2info->initialized)
 636                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
 637         down_write(&ACCESS_FBINFO(crtc2.lock));
 638         oldcrtc2 = ACCESS_FBINFO(crtc2.info);
 639         ACCESS_FBINFO(crtc2.info) = m2info;
 640         up_write(&ACCESS_FBINFO(crtc2.lock));
 641         if (oldcrtc2) {
 642                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
 643                         oldcrtc2);
 644         }
 645         return 0;
 646 #undef minfo
 647 }
 648
 649 /* ************************** */
 650
 651 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
 652 #define minfo (m2info->primary_dev)
 653         if (matroxfb_dh_regit(PMINFO m2info)) {
 654                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
 655                 return -1;
 656         }
 657         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
 658                 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
 659         m2info->fbcon_registered = 1;
 660         return 0;
 661 #undef minfo
 662 }
 663
 664 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
 665 #define minfo (m2info->primary_dev)
 666         if (m2info->fbcon_registered) {
 667                 int id;
 668                 struct matroxfb_dh_fb_info* crtc2;
 669
 670                 down_write(&ACCESS_FBINFO(crtc2.lock));
 671                 crtc2 = ACCESS_FBINFO(crtc2.info);
 672                 if (crtc2 == m2info)
 673                         ACCESS_FBINFO(crtc2.info) = NULL;
 674                 up_write(&ACCESS_FBINFO(crtc2.lock));
 675                 if (crtc2 != m2info) {
 676                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
 677                                 crtc2, m2info);
 678                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
 679                         return;
 680                 }
 681                 id = m2info->fbcon.node;
 682                 unregister_framebuffer(&m2info->fbcon);
 683                 /* return memory back to primary head */
 684                 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
 685                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
 686                 m2info->fbcon_registered = 0;
 687         }
 688 #undef minfo
 689 }
 690
 691 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
 692         struct matroxfb_dh_fb_info* m2info;
 693
 694         /* hardware is CRTC2 incapable... */
 695         if (!ACCESS_FBINFO(devflags.crtc2))
 696                 return NULL;
 697         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
 698         if (!m2info) {
 699                 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
 700                 return NULL;
 701         }
 702         m2info->primary_dev = MINFO;
 703         if (matroxfb_dh_registerfb(m2info)) {
 704                 kfree(m2info);
 705                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
 706                 return NULL;
 707         }
 708         return m2info;
 709 }
 710
 711 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
 712         matroxfb_dh_deregisterfb(crtc2);
 713         kfree(crtc2);
 714 }
 715
 716 static struct matroxfb_driver crtc2 = {
 717                 .name =         "Matrox G400 CRTC2",
 718                 .probe =        matroxfb_crtc2_probe,
 719                 .remove =       matroxfb_crtc2_remove };
 720
 721 static int matroxfb_crtc2_init(void) {
 722         if (fb_get_options("matrox_crtc2fb", NULL))
 723                 return -ENODEV;
 724
 725         matroxfb_register_driver(&crtc2);
 726         return 0;
 727 }
 728
 729 static void matroxfb_crtc2_exit(void) {
 730         matroxfb_unregister_driver(&crtc2);
 731 }
 732
 733 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
 734 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
 735 MODULE_LICENSE("GPL");
 736 module_init(matroxfb_crtc2_init);
 737 module_exit(matroxfb_crtc2_exit);
 738 /* we do not have __setup() yet */