kernel/drivers/video/fbdev/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 <linux/slab.h>
  19 #include <linux/uaccess.h>
  20
  21 /* **************************************************** */
  22
  23 static int mem = 8192;
  24
  25 module_param(mem, int, 0);
  26 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
  27
  28 /* **************************************************** */
  29
  30 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
  31                 unsigned blue, unsigned transp, struct fb_info* info) {
  32         u_int32_t col;
  33 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
  34
  35         if (regno >= 16)
  36                 return 1;
  37         if (m2info->fbcon.var.grayscale) {
  38                 /* gray = 0.30*R + 0.59*G + 0.11*B */
  39                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
  40         }
  41         red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
  42         green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
  43         blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
  44         transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
  45
  46         col = (red << m2info->fbcon.var.red.offset)     |
  47               (green << m2info->fbcon.var.green.offset) |
  48               (blue << m2info->fbcon.var.blue.offset)   |
  49               (transp << m2info->fbcon.var.transp.offset);
  50
  51         switch (m2info->fbcon.var.bits_per_pixel) {
  52                 case 16:
  53                         m2info->cmap[regno] = col | (col << 16);
  54                         break;
  55                 case 32:
  56                         m2info->cmap[regno] = col;
  57                         break;
  58         }
  59         return 0;
  60 #undef m2info
  61 }
  62
  63 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
  64                 struct my_timming* mt,
  65                 int mode,
  66                 unsigned int pos) {
  67         u_int32_t tmp;
  68         u_int32_t datactl;
  69         struct matrox_fb_info *minfo = m2info->primary_dev;
  70
  71         switch (mode) {
  72                 case 15:
  73                         tmp = 0x00200000;
  74                         break;
  75                 case 16:
  76                         tmp = 0x00400000;
  77                         break;
  78 /*              case 32: */
  79                 default:
  80                         tmp = 0x00800000;
  81                         break;
  82         }
  83         tmp |= 0x00000001;      /* enable CRTC2 */
  84         datactl = 0;
  85         if (minfo->outputs[1].src == MATROXFB_SRC_CRTC2) {
  86                 if (minfo->devflags.g450dac) {
  87                         tmp |= 0x00000006; /* source from secondary pixel PLL */
  88                         /* no vidrst when in monitor mode */
  89                         if (minfo->outputs[1].mode != MATROXFB_OUTPUT_MODE_MONITOR) {
  90                                 tmp |=  0xC0001000; /* Enable H/V vidrst */
  91                         }
  92                 } else {
  93                         tmp |= 0x00000002; /* source from VDOCLK */
  94                         tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
  95                         /* MGA TVO is our clock source */
  96                 }
  97         } else if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
  98                 tmp |= 0x00000004; /* source from pixclock */
  99                 /* PIXPLL is our clock source */
 100         }
 101         if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
 102                 tmp |= 0x00100000;      /* connect CRTC2 to DAC */
 103         }
 104         if (mt->interlaced) {
 105                 tmp |= 0x02000000;      /* interlaced, second field is bigger, as G450 apparently ignores it */
 106                 mt->VDisplay >>= 1;
 107                 mt->VSyncStart >>= 1;
 108                 mt->VSyncEnd >>= 1;
 109                 mt->VTotal >>= 1;
 110         }
 111         if ((mt->HTotal & 7) == 2) {
 112                 datactl |= 0x00000010;
 113                 mt->HTotal &= ~7;
 114         }
 115         tmp |= 0x10000000;      /* 0x10000000 is VIDRST polarity */
 116         mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
 117         mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
 118         mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
 119         mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
 120         mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart));  /* preload */
 121         {
 122                 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
 123                 if (tmp & 0x02000000) {
 124                         /* field #0 is smaller, so... */
 125                         mga_outl(0x3C2C, pos);                  /* field #1 vmemory start */
 126                         mga_outl(0x3C28, pos + linelen);        /* field #0 vmemory start */
 127                         linelen <<= 1;
 128                         m2info->interlaced = 1;
 129                 } else {
 130                         mga_outl(0x3C28, pos);          /* vmemory start */
 131                         m2info->interlaced = 0;
 132                 }
 133                 mga_outl(0x3C40, linelen);
 134         }
 135         mga_outl(0x3C4C, datactl);      /* data control */
 136         if (tmp & 0x02000000) {
 137                 int i;
 138
 139                 mga_outl(0x3C10, tmp & ~0x02000000);
 140                 for (i = 0; i < 2; i++) {
 141                         unsigned int nl;
 142                         unsigned int lastl = 0;
 143
 144                         while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
 145                                 lastl = nl;
 146                         }
 147                 }
 148         }
 149         mga_outl(0x3C10, tmp);
 150         minfo->hw.crtc2.ctl = tmp;
 151
 152         tmp = mt->VDisplay << 16;       /* line compare */
 153         if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
 154                 tmp |= 0x00000100;
 155         if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
 156                 tmp |= 0x00000200;
 157         mga_outl(0x3C44, tmp);
 158 }
 159
 160 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
 161         struct matrox_fb_info *minfo = m2info->primary_dev;
 162
 163         mga_outl(0x3C10, 0x00000004);   /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
 164         minfo->hw.crtc2.ctl = 0x00000004;
 165 }
 166
 167 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
 168                 struct fb_var_screeninfo* var) {
 169         unsigned int pos;
 170         unsigned int linelen;
 171         unsigned int pixelsize;
 172         struct matrox_fb_info *minfo = m2info->primary_dev;
 173
 174         m2info->fbcon.var.xoffset = var->xoffset;
 175         m2info->fbcon.var.yoffset = var->yoffset;
 176         pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
 177         linelen = m2info->fbcon.var.xres_virtual * pixelsize;
 178         pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
 179         pos += m2info->video.offbase;
 180         if (m2info->interlaced) {
 181                 mga_outl(0x3C2C, pos);
 182                 mga_outl(0x3C28, pos + linelen);
 183         } else {
 184                 mga_outl(0x3C28, pos);
 185         }
 186 }
 187
 188 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
 189                 struct fb_var_screeninfo* var,
 190                 int *visual,
 191                 int *video_cmap_len,
 192                 int *mode) {
 193         unsigned int mask;
 194         unsigned int memlen;
 195         unsigned int vramlen;
 196
 197         switch (var->bits_per_pixel) {
 198                 case 16:        mask = 0x1F;
 199                                 break;
 200                 case 32:        mask = 0x0F;
 201                                 break;
 202                 default:        return -EINVAL;
 203         }
 204         vramlen = m2info->video.len_usable;
 205         if (var->yres_virtual < var->yres)
 206                 var->yres_virtual = var->yres;
 207         if (var->xres_virtual < var->xres)
 208                 var->xres_virtual = var->xres;
 209         var->xres_virtual = (var->xres_virtual + mask) & ~mask;
 210         if (var->yres_virtual > 32767)
 211                 return -EINVAL;
 212         memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
 213         if (memlen > vramlen)
 214                 return -EINVAL;
 215         if (var->xoffset + var->xres > var->xres_virtual)
 216                 var->xoffset = var->xres_virtual - var->xres;
 217         if (var->yoffset + var->yres > var->yres_virtual)
 218                 var->yoffset = var->yres_virtual - var->yres;
 219
 220         var->xres &= ~7;
 221         var->left_margin &= ~7;
 222         var->right_margin &= ~7;
 223         var->hsync_len &= ~7;
 224
 225         *mode = var->bits_per_pixel;
 226         if (var->bits_per_pixel == 16) {
 227                 if (var->green.length == 5) {
 228                         var->red.offset = 10;
 229                         var->red.length = 5;
 230                         var->green.offset = 5;
 231                         var->green.length = 5;
 232                         var->blue.offset = 0;
 233                         var->blue.length = 5;
 234                         var->transp.offset = 15;
 235                         var->transp.length = 1;
 236                         *mode = 15;
 237                 } else {
 238                         var->red.offset = 11;
 239                         var->red.length = 5;
 240                         var->green.offset = 5;
 241                         var->green.length = 6;
 242                         var->blue.offset = 0;
 243                         var->blue.length = 5;
 244                         var->transp.offset = 0;
 245                         var->transp.length = 0;
 246                 }
 247         } else {
 248                         var->red.offset = 16;
 249                         var->red.length = 8;
 250                         var->green.offset = 8;
 251                         var->green.length = 8;
 252                         var->blue.offset = 0;
 253                         var->blue.length = 8;
 254                         var->transp.offset = 24;
 255                         var->transp.length = 8;
 256         }
 257         *visual = FB_VISUAL_TRUECOLOR;
 258         *video_cmap_len = 16;
 259         return 0;
 260 }
 261
 262 static int matroxfb_dh_open(struct fb_info* info, int user) {
 263 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 264         struct matrox_fb_info *minfo = m2info->primary_dev;
 265
 266         if (minfo) {
 267                 int err;
 268
 269                 if (minfo->dead) {
 270                         return -ENXIO;
 271                 }
 272                 err = minfo->fbops.fb_open(&minfo->fbcon, user);
 273                 if (err) {
 274                         return err;
 275                 }
 276         }
 277         return 0;
 278 #undef m2info
 279 }
 280
 281 static int matroxfb_dh_release(struct fb_info* info, int user) {
 282 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 283         int err = 0;
 284         struct matrox_fb_info *minfo = m2info->primary_dev;
 285
 286         if (minfo) {
 287                 err = minfo->fbops.fb_release(&minfo->fbcon, user);
 288         }
 289         return err;
 290 #undef m2info
 291 }
 292
 293 /*
 294  * This function is called before the register_framebuffer so
 295  * no locking is needed.
 296  */
 297 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
 298 {
 299         struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
 300
 301         strcpy(fix->id, "MATROX DH");
 302
 303         fix->smem_start = m2info->video.base;
 304         fix->smem_len = m2info->video.len_usable;
 305         fix->ypanstep = 1;
 306         fix->ywrapstep = 0;
 307         fix->xpanstep = 8;      /* TBD */
 308         fix->mmio_start = m2info->mmio.base;
 309         fix->mmio_len = m2info->mmio.len;
 310         fix->accel = 0;         /* no accel... */
 311 }
 312
 313 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
 314 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 315         int visual;
 316         int cmap_len;
 317         int mode;
 318
 319         return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
 320 #undef m2info
 321 }
 322
 323 static int matroxfb_dh_set_par(struct fb_info* info) {
 324 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 325         int visual;
 326         int cmap_len;
 327         int mode;
 328         int err;
 329         struct fb_var_screeninfo* var = &info->var;
 330         struct matrox_fb_info *minfo = m2info->primary_dev;
 331
 332         if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
 333                 return err;
 334         /* cmap */
 335         {
 336                 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
 337                 m2info->fbcon.fix.visual = visual;
 338                 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
 339                 m2info->fbcon.fix.type_aux = 0;
 340                 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
 341         }
 342         {
 343                 struct my_timming mt;
 344                 unsigned int pos;
 345                 int out;
 346                 int cnt;
 347
 348                 matroxfb_var2my(&m2info->fbcon.var, &mt);
 349                 mt.crtc = MATROXFB_SRC_CRTC2;
 350                 /* CRTC2 delay */
 351                 mt.delay = 34;
 352
 353                 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
 354                 pos += m2info->video.offbase;
 355                 cnt = 0;
 356                 down_read(&minfo->altout.lock);
 357                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 358                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
 359                                 cnt++;
 360                                 if (minfo->outputs[out].output->compute) {
 361                                         minfo->outputs[out].output->compute(minfo->outputs[out].data, &mt);
 362                                 }
 363                         }
 364                 }
 365                 minfo->crtc2.pixclock = mt.pixclock;
 366                 minfo->crtc2.mnp = mt.mnp;
 367                 up_read(&minfo->altout.lock);
 368                 if (cnt) {
 369                         matroxfb_dh_restore(m2info, &mt, mode, pos);
 370                 } else {
 371                         matroxfb_dh_disable(m2info);
 372                 }
 373                 DAC1064_global_init(minfo);
 374                 DAC1064_global_restore(minfo);
 375                 down_read(&minfo->altout.lock);
 376                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 377                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
 378                             minfo->outputs[out].output->program) {
 379                                 minfo->outputs[out].output->program(minfo->outputs[out].data);
 380                         }
 381                 }
 382                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 383                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
 384                             minfo->outputs[out].output->start) {
 385                                 minfo->outputs[out].output->start(minfo->outputs[out].data);
 386                         }
 387                 }
 388                 up_read(&minfo->altout.lock);
 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         struct matrox_fb_info *minfo = m2info->primary_dev;
 404
 405         matroxfb_enable_irq(minfo, 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, &minfo->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 = minfo->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         struct matrox_fb_info *minfo = m2info->primary_dev;
 428
 429         DBG(__func__)
 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(minfo, 1);
 454                         }
 455                 case MATROXFB_SET_OUTPUT_MODE:
 456                 case MATROXFB_GET_OUTPUT_MODE:
 457                 case MATROXFB_GET_ALL_OUTPUTS:
 458                         {
 459                                 return minfo->fbcon.fbops->fb_ioctl(&minfo->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 (!minfo->outputs[out].output)
 474                                                         return -ENXIO;
 475                                                 switch (minfo->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 (minfo->devflags.panellink) {
 485                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
 486                                                 return -EINVAL;
 487                                         if ((minfo->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 (minfo->outputs[out].src != MATROXFB_SRC_CRTC2) {
 494                                                         changes = 1;
 495                                                         minfo->outputs[out].src = MATROXFB_SRC_CRTC2;
 496                                                 }
 497                                         } else if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
 498                                                 changes = 1;
 499                                                 minfo->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 (minfo->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 (minfo->outputs[out].output) {
 528                                                 switch (minfo->outputs[out].src) {
 529                                                         case MATROXFB_SRC_NONE:
 530                                                         case MATROXFB_SRC_CRTC2:
 531                                                                 tmp |= 1 << out;
 532                                                                 break;
 533                                                 }
 534                                         }
 535                                 }
 536                                 if (minfo->devflags.panellink) {
 537                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
 538                                         if (minfo->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 };
 597
 598 static int matroxfb_dh_regit(const struct matrox_fb_info *minfo,
 599                              struct matroxfb_dh_fb_info *m2info)
 600 {
 601 #define minfo (m2info->primary_dev)
 602         void* oldcrtc2;
 603
 604         m2info->fbcon.fbops = &matroxfb_dh_ops;
 605         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
 606         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
 607                                FBINFO_HWACCEL_YPAN;
 608         m2info->fbcon.pseudo_palette = m2info->cmap;
 609         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
 610
 611         if (mem < 64)
 612                 mem *= 1024;
 613         if (mem < 64*1024)
 614                 mem *= 1024;
 615         mem &= ~0x00000FFF;     /* PAGE_MASK? */
 616         if (minfo->video.len_usable + mem <= minfo->video.len)
 617                 m2info->video.offbase = minfo->video.len - mem;
 618         else if (minfo->video.len < mem) {
 619                 return -ENOMEM;
 620         } else { /* check yres on first head... */
 621                 m2info->video.borrowed = mem;
 622                 minfo->video.len_usable -= mem;
 623                 m2info->video.offbase = minfo->video.len_usable;
 624         }
 625         m2info->video.base = minfo->video.base + m2info->video.offbase;
 626         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
 627         m2info->video.vbase.vaddr = vaddr_va(minfo->video.vbase) + m2info->video.offbase;
 628         m2info->mmio.base = minfo->mmio.base;
 629         m2info->mmio.vbase = minfo->mmio.vbase;
 630         m2info->mmio.len = minfo->mmio.len;
 631
 632         matroxfb_dh_init_fix(m2info);
 633         if (register_framebuffer(&m2info->fbcon)) {
 634                 return -ENXIO;
 635         }
 636         if (!m2info->initialized)
 637                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
 638         down_write(&minfo->crtc2.lock);
 639         oldcrtc2 = minfo->crtc2.info;
 640         minfo->crtc2.info = m2info;
 641         up_write(&minfo->crtc2.lock);
 642         if (oldcrtc2) {
 643                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
 644                         oldcrtc2);
 645         }
 646         return 0;
 647 #undef minfo
 648 }
 649
 650 /* ************************** */
 651
 652 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
 653 #define minfo (m2info->primary_dev)
 654         if (matroxfb_dh_regit(minfo, m2info)) {
 655                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
 656                 return -1;
 657         }
 658         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
 659                 minfo->fbcon.node, m2info->fbcon.node);
 660         m2info->fbcon_registered = 1;
 661         return 0;
 662 #undef minfo
 663 }
 664
 665 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
 666 #define minfo (m2info->primary_dev)
 667         if (m2info->fbcon_registered) {
 668                 int id;
 669                 struct matroxfb_dh_fb_info* crtc2;
 670
 671                 down_write(&minfo->crtc2.lock);
 672                 crtc2 = minfo->crtc2.info;
 673                 if (crtc2 == m2info)
 674                         minfo->crtc2.info = NULL;
 675                 up_write(&minfo->crtc2.lock);
 676                 if (crtc2 != m2info) {
 677                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
 678                                 crtc2, m2info);
 679                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
 680                         return;
 681                 }
 682                 id = m2info->fbcon.node;
 683                 unregister_framebuffer(&m2info->fbcon);
 684                 /* return memory back to primary head */
 685                 minfo->video.len_usable += m2info->video.borrowed;
 686                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
 687                 m2info->fbcon_registered = 0;
 688         }
 689 #undef minfo
 690 }
 691
 692 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
 693         struct matroxfb_dh_fb_info* m2info;
 694
 695         /* hardware is CRTC2 incapable... */
 696         if (!minfo->devflags.crtc2)
 697                 return NULL;
 698         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
 699         if (!m2info) {
 700                 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
 701                 return NULL;
 702         }
 703         m2info->primary_dev = minfo;
 704         if (matroxfb_dh_registerfb(m2info)) {
 705                 kfree(m2info);
 706                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
 707                 return NULL;
 708         }
 709         return m2info;
 710 }
 711
 712 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
 713         matroxfb_dh_deregisterfb(crtc2);
 714         kfree(crtc2);
 715 }
 716
 717 static struct matroxfb_driver crtc2 = {
 718                 .name =         "Matrox G400 CRTC2",
 719                 .probe =        matroxfb_crtc2_probe,
 720                 .remove =       matroxfb_crtc2_remove };
 721
 722 static int matroxfb_crtc2_init(void) {
 723         if (fb_get_options("matrox_crtc2fb", NULL))
 724                 return -ENODEV;
 725
 726         matroxfb_register_driver(&crtc2);
 727         return 0;
 728 }
 729
 730 static void matroxfb_crtc2_exit(void) {
 731         matroxfb_unregister_driver(&crtc2);
 732 }
 733
 734 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
 735 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
 736 MODULE_LICENSE("GPL");
 737 module_init(matroxfb_crtc2_init);
 738 module_exit(matroxfb_crtc2_exit);
 739 /* we do not have __setup() yet */