drivers/video/fbdev/matrox/matroxfb_crtc2.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
   5  *
   6  * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
   7  *
   8  * Portions Copyright (c) 2001 Matrox Graphics Inc.
   9  *
  10  * Version: 1.65 2002/08/14
  11  *
  12  */
  13
  14 #include "matroxfb_maven.h"
  15 #include "matroxfb_crtc2.h"
  16 #include "matroxfb_misc.h"
  17 #include "matroxfb_DAC1064.h"
  18 #include <linux/matroxfb.h>
  19 #include <linux/slab.h>
  20 #include <linux/uaccess.h>
  21
  22 /* **************************************************** */
  23
  24 static int mem = 8192;
  25
  26 module_param(mem, int, 0);
  27 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
  28
  29 /* **************************************************** */
  30
  31 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
  32                 unsigned blue, unsigned transp, struct fb_info* info) {
  33         u_int32_t col;
  34 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
  35
  36         if (regno >= 16)
  37                 return 1;
  38         if (m2info->fbcon.var.grayscale) {
  39                 /* gray = 0.30*R + 0.59*G + 0.11*B */
  40                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
  41         }
  42         red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
  43         green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
  44         blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
  45         transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
  46
  47         col = (red << m2info->fbcon.var.red.offset)     |
  48               (green << m2info->fbcon.var.green.offset) |
  49               (blue << m2info->fbcon.var.blue.offset)   |
  50               (transp << m2info->fbcon.var.transp.offset);
  51
  52         switch (m2info->fbcon.var.bits_per_pixel) {
  53                 case 16:
  54                         m2info->cmap[regno] = col | (col << 16);
  55                         break;
  56                 case 32:
  57                         m2info->cmap[regno] = col;
  58                         break;
  59         }
  60         return 0;
  61 #undef m2info
  62 }
  63
  64 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
  65                 struct my_timming* mt,
  66                 int mode,
  67                 unsigned int pos) {
  68         u_int32_t tmp;
  69         u_int32_t datactl;
  70         struct matrox_fb_info *minfo = m2info->primary_dev;
  71
  72         switch (mode) {
  73                 case 15:
  74                         tmp = 0x00200000;
  75                         break;
  76                 case 16:
  77                         tmp = 0x00400000;
  78                         break;
  79 /*              case 32: */
  80                 default:
  81                         tmp = 0x00800000;
  82                         break;
  83         }
  84         tmp |= 0x00000001;      /* enable CRTC2 */
  85         datactl = 0;
  86         if (minfo->outputs[1].src == MATROXFB_SRC_CRTC2) {
  87                 if (minfo->devflags.g450dac) {
  88                         tmp |= 0x00000006; /* source from secondary pixel PLL */
  89                         /* no vidrst when in monitor mode */
  90                         if (minfo->outputs[1].mode != MATROXFB_OUTPUT_MODE_MONITOR) {
  91                                 tmp |=  0xC0001000; /* Enable H/V vidrst */
  92                         }
  93                 } else {
  94                         tmp |= 0x00000002; /* source from VDOCLK */
  95                         tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
  96                         /* MGA TVO is our clock source */
  97                 }
  98         } else if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
  99                 tmp |= 0x00000004; /* source from pixclock */
 100                 /* PIXPLL is our clock source */
 101         }
 102         if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
 103                 tmp |= 0x00100000;      /* connect CRTC2 to DAC */
 104         }
 105         if (mt->interlaced) {
 106                 tmp |= 0x02000000;      /* interlaced, second field is bigger, as G450 apparently ignores it */
 107                 mt->VDisplay >>= 1;
 108                 mt->VSyncStart >>= 1;
 109                 mt->VSyncEnd >>= 1;
 110                 mt->VTotal >>= 1;
 111         }
 112         if ((mt->HTotal & 7) == 2) {
 113                 datactl |= 0x00000010;
 114                 mt->HTotal &= ~7;
 115         }
 116         tmp |= 0x10000000;      /* 0x10000000 is VIDRST polarity */
 117         mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
 118         mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
 119         mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
 120         mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
 121         mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart));  /* preload */
 122         {
 123                 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
 124                 if (tmp & 0x02000000) {
 125                         /* field #0 is smaller, so... */
 126                         mga_outl(0x3C2C, pos);                  /* field #1 vmemory start */
 127                         mga_outl(0x3C28, pos + linelen);        /* field #0 vmemory start */
 128                         linelen <<= 1;
 129                         m2info->interlaced = 1;
 130                 } else {
 131                         mga_outl(0x3C28, pos);          /* vmemory start */
 132                         m2info->interlaced = 0;
 133                 }
 134                 mga_outl(0x3C40, linelen);
 135         }
 136         mga_outl(0x3C4C, datactl);      /* data control */
 137         if (tmp & 0x02000000) {
 138                 int i;
 139
 140                 mga_outl(0x3C10, tmp & ~0x02000000);
 141                 for (i = 0; i < 2; i++) {
 142                         unsigned int nl;
 143                         unsigned int lastl = 0;
 144
 145                         while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
 146                                 lastl = nl;
 147                         }
 148                 }
 149         }
 150         mga_outl(0x3C10, tmp);
 151         minfo->hw.crtc2.ctl = tmp;
 152
 153         tmp = mt->VDisplay << 16;       /* line compare */
 154         if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
 155                 tmp |= 0x00000100;
 156         if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
 157                 tmp |= 0x00000200;
 158         mga_outl(0x3C44, tmp);
 159 }
 160
 161 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
 162         struct matrox_fb_info *minfo = m2info->primary_dev;
 163
 164         mga_outl(0x3C10, 0x00000004);   /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
 165         minfo->hw.crtc2.ctl = 0x00000004;
 166 }
 167
 168 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
 169                 struct fb_var_screeninfo* var) {
 170         unsigned int pos;
 171         unsigned int linelen;
 172         unsigned int pixelsize;
 173         struct matrox_fb_info *minfo = m2info->primary_dev;
 174
 175         m2info->fbcon.var.xoffset = var->xoffset;
 176         m2info->fbcon.var.yoffset = var->yoffset;
 177         pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
 178         linelen = m2info->fbcon.var.xres_virtual * pixelsize;
 179         pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
 180         pos += m2info->video.offbase;
 181         if (m2info->interlaced) {
 182                 mga_outl(0x3C2C, pos);
 183                 mga_outl(0x3C28, pos + linelen);
 184         } else {
 185                 mga_outl(0x3C28, pos);
 186         }
 187 }
 188
 189 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
 190                 struct fb_var_screeninfo* var,
 191                 int *visual,
 192                 int *video_cmap_len,
 193                 int *mode) {
 194         unsigned int mask;
 195         unsigned int memlen;
 196         unsigned int vramlen;
 197
 198         switch (var->bits_per_pixel) {
 199                 case 16:        mask = 0x1F;
 200                                 break;
 201                 case 32:        mask = 0x0F;
 202                                 break;
 203                 default:        return -EINVAL;
 204         }
 205         vramlen = m2info->video.len_usable;
 206         if (var->yres_virtual < var->yres)
 207                 var->yres_virtual = var->yres;
 208         if (var->xres_virtual < var->xres)
 209                 var->xres_virtual = var->xres;
 210         var->xres_virtual = (var->xres_virtual + mask) & ~mask;
 211         if (var->yres_virtual > 32767)
 212                 return -EINVAL;
 213         memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
 214         if (memlen > vramlen)
 215                 return -EINVAL;
 216         if (var->xoffset + var->xres > var->xres_virtual)
 217                 var->xoffset = var->xres_virtual - var->xres;
 218         if (var->yoffset + var->yres > var->yres_virtual)
 219                 var->yoffset = var->yres_virtual - var->yres;
 220
 221         var->xres &= ~7;
 222         var->left_margin &= ~7;
 223         var->right_margin &= ~7;
 224         var->hsync_len &= ~7;
 225
 226         *mode = var->bits_per_pixel;
 227         if (var->bits_per_pixel == 16) {
 228                 if (var->green.length == 5) {
 229                         var->red.offset = 10;
 230                         var->red.length = 5;
 231                         var->green.offset = 5;
 232                         var->green.length = 5;
 233                         var->blue.offset = 0;
 234                         var->blue.length = 5;
 235                         var->transp.offset = 15;
 236                         var->transp.length = 1;
 237                         *mode = 15;
 238                 } else {
 239                         var->red.offset = 11;
 240                         var->red.length = 5;
 241                         var->green.offset = 5;
 242                         var->green.length = 6;
 243                         var->blue.offset = 0;
 244                         var->blue.length = 5;
 245                         var->transp.offset = 0;
 246                         var->transp.length = 0;
 247                 }
 248         } else {
 249                         var->red.offset = 16;
 250                         var->red.length = 8;
 251                         var->green.offset = 8;
 252                         var->green.length = 8;
 253                         var->blue.offset = 0;
 254                         var->blue.length = 8;
 255                         var->transp.offset = 24;
 256                         var->transp.length = 8;
 257         }
 258         *visual = FB_VISUAL_TRUECOLOR;
 259         *video_cmap_len = 16;
 260         return 0;
 261 }
 262
 263 static int matroxfb_dh_open(struct fb_info* info, int user) {
 264 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 265         struct matrox_fb_info *minfo = m2info->primary_dev;
 266
 267         if (minfo) {
 268                 int err;
 269
 270                 if (minfo->dead) {
 271                         return -ENXIO;
 272                 }
 273                 err = minfo->fbops.fb_open(&minfo->fbcon, user);
 274                 if (err) {
 275                         return err;
 276                 }
 277         }
 278         return 0;
 279 #undef m2info
 280 }
 281
 282 static int matroxfb_dh_release(struct fb_info* info, int user) {
 283 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 284         int err = 0;
 285         struct matrox_fb_info *minfo = m2info->primary_dev;
 286
 287         if (minfo) {
 288                 err = minfo->fbops.fb_release(&minfo->fbcon, user);
 289         }
 290         return err;
 291 #undef m2info
 292 }
 293
 294 /*
 295  * This function is called before the register_framebuffer so
 296  * no locking is needed.
 297  */
 298 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
 299 {
 300         struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
 301
 302         strcpy(fix->id, "MATROX DH");
 303
 304         fix->smem_start = m2info->video.base;
 305         fix->smem_len = m2info->video.len_usable;
 306         fix->ypanstep = 1;
 307         fix->ywrapstep = 0;
 308         fix->xpanstep = 8;      /* TBD */
 309         fix->mmio_start = m2info->mmio.base;
 310         fix->mmio_len = m2info->mmio.len;
 311         fix->accel = 0;         /* no accel... */
 312 }
 313
 314 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
 315 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 316         int visual;
 317         int cmap_len;
 318         int mode;
 319
 320         return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
 321 #undef m2info
 322 }
 323
 324 static int matroxfb_dh_set_par(struct fb_info* info) {
 325 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 326         int visual;
 327         int cmap_len;
 328         int mode;
 329         int err;
 330         struct fb_var_screeninfo* var = &info->var;
 331         struct matrox_fb_info *minfo = m2info->primary_dev;
 332
 333         if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
 334                 return err;
 335         /* cmap */
 336         {
 337                 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
 338                 m2info->fbcon.fix.visual = visual;
 339                 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
 340                 m2info->fbcon.fix.type_aux = 0;
 341                 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
 342         }
 343         {
 344                 struct my_timming mt;
 345                 unsigned int pos;
 346                 int out;
 347                 int cnt;
 348
 349                 matroxfb_var2my(&m2info->fbcon.var, &mt);
 350                 mt.crtc = MATROXFB_SRC_CRTC2;
 351                 /* CRTC2 delay */
 352                 mt.delay = 34;
 353
 354                 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
 355                 pos += m2info->video.offbase;
 356                 cnt = 0;
 357                 down_read(&minfo->altout.lock);
 358                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 359                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
 360                                 cnt++;
 361                                 if (minfo->outputs[out].output->compute) {
 362                                         minfo->outputs[out].output->compute(minfo->outputs[out].data, &mt);
 363                                 }
 364                         }
 365                 }
 366                 minfo->crtc2.pixclock = mt.pixclock;
 367                 minfo->crtc2.mnp = mt.mnp;
 368                 up_read(&minfo->altout.lock);
 369                 if (cnt) {
 370                         matroxfb_dh_restore(m2info, &mt, mode, pos);
 371                 } else {
 372                         matroxfb_dh_disable(m2info);
 373                 }
 374                 DAC1064_global_init(minfo);
 375                 DAC1064_global_restore(minfo);
 376                 down_read(&minfo->altout.lock);
 377                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 378                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
 379                             minfo->outputs[out].output->program) {
 380                                 minfo->outputs[out].output->program(minfo->outputs[out].data);
 381                         }
 382                 }
 383                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 384                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
 385                             minfo->outputs[out].output->start) {
 386                                 minfo->outputs[out].output->start(minfo->outputs[out].data);
 387                         }
 388                 }
 389                 up_read(&minfo->altout.lock);
 390         }
 391         m2info->initialized = 1;
 392         return 0;
 393 #undef m2info
 394 }
 395
 396 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
 397 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 398         matroxfb_dh_pan_var(m2info, var);
 399         return 0;
 400 #undef m2info
 401 }
 402
 403 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
 404         struct matrox_fb_info *minfo = m2info->primary_dev;
 405
 406         matroxfb_enable_irq(minfo, 0);
 407         memset(vblank, 0, sizeof(*vblank));
 408         vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
 409         /* mask out reserved bits + field number (odd/even) */
 410         vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
 411         /* compatibility stuff */
 412         if (vblank->vcount >= m2info->fbcon.var.yres)
 413                 vblank->flags |= FB_VBLANK_VBLANKING;
 414         if (test_bit(0, &minfo->irq_flags)) {
 415                 vblank->flags |= FB_VBLANK_HAVE_COUNT;
 416                 /* Only one writer, aligned int value...
 417                    it should work without lock and without atomic_t */
 418                 vblank->count = minfo->crtc2.vsync.cnt;
 419         }
 420         return 0;
 421 }
 422
 423 static int matroxfb_dh_ioctl(struct fb_info *info,
 424                 unsigned int cmd,
 425                 unsigned long arg)
 426 {
 427 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 428         struct matrox_fb_info *minfo = m2info->primary_dev;
 429
 430         DBG(__func__)
 431
 432         switch (cmd) {
 433                 case FBIOGET_VBLANK:
 434                         {
 435                                 struct fb_vblank vblank;
 436                                 int err;
 437
 438                                 err = matroxfb_dh_get_vblank(m2info, &vblank);
 439                                 if (err)
 440                                         return err;
 441                                 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
 442                                         return -EFAULT;
 443                                 return 0;
 444                         }
 445                 case FBIO_WAITFORVSYNC:
 446                         {
 447                                 u_int32_t crt;
 448
 449                                 if (get_user(crt, (u_int32_t __user *)arg))
 450                                         return -EFAULT;
 451
 452                                 if (crt != 0)
 453                                         return -ENODEV;
 454                                 return matroxfb_wait_for_sync(minfo, 1);
 455                         }
 456                 case MATROXFB_SET_OUTPUT_MODE:
 457                 case MATROXFB_GET_OUTPUT_MODE:
 458                 case MATROXFB_GET_ALL_OUTPUTS:
 459                         {
 460                                 return minfo->fbcon.fbops->fb_ioctl(&minfo->fbcon, cmd, arg);
 461                         }
 462                 case MATROXFB_SET_OUTPUT_CONNECTION:
 463                         {
 464                                 u_int32_t tmp;
 465                                 int out;
 466                                 int changes;
 467
 468                                 if (get_user(tmp, (u_int32_t __user *)arg))
 469                                         return -EFAULT;
 470                                 for (out = 0; out < 32; out++) {
 471                                         if (tmp & (1 << out)) {
 472                                                 if (out >= MATROXFB_MAX_OUTPUTS)
 473                                                         return -ENXIO;
 474                                                 if (!minfo->outputs[out].output)
 475                                                         return -ENXIO;
 476                                                 switch (minfo->outputs[out].src) {
 477                                                         case MATROXFB_SRC_NONE:
 478                                                         case MATROXFB_SRC_CRTC2:
 479                                                                 break;
 480                                                         default:
 481                                                                 return -EBUSY;
 482                                                 }
 483                                         }
 484                                 }
 485                                 if (minfo->devflags.panellink) {
 486                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
 487                                                 return -EINVAL;
 488                                         if ((minfo->outputs[2].src == MATROXFB_SRC_CRTC1) && tmp)
 489                                                 return -EBUSY;
 490                                 }
 491                                 changes = 0;
 492                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 493                                         if (tmp & (1 << out)) {
 494                                                 if (minfo->outputs[out].src != MATROXFB_SRC_CRTC2) {
 495                                                         changes = 1;
 496                                                         minfo->outputs[out].src = MATROXFB_SRC_CRTC2;
 497                                                 }
 498                                         } else if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
 499                                                 changes = 1;
 500                                                 minfo->outputs[out].src = MATROXFB_SRC_NONE;
 501                                         }
 502                                 }
 503                                 if (!changes)
 504                                         return 0;
 505                                 matroxfb_dh_set_par(info);
 506                                 return 0;
 507                         }
 508                 case MATROXFB_GET_OUTPUT_CONNECTION:
 509                         {
 510                                 u_int32_t conn = 0;
 511                                 int out;
 512
 513                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 514                                         if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
 515                                                 conn |= 1 << out;
 516                                         }
 517                                 }
 518                                 if (put_user(conn, (u_int32_t __user *)arg))
 519                                         return -EFAULT;
 520                                 return 0;
 521                         }
 522                 case MATROXFB_GET_AVAILABLE_OUTPUTS:
 523                         {
 524                                 u_int32_t tmp = 0;
 525                                 int out;
 526
 527                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 528                                         if (minfo->outputs[out].output) {
 529                                                 switch (minfo->outputs[out].src) {
 530                                                         case MATROXFB_SRC_NONE:
 531                                                         case MATROXFB_SRC_CRTC2:
 532                                                                 tmp |= 1 << out;
 533                                                                 break;
 534                                                 }
 535                                         }
 536                                 }
 537                                 if (minfo->devflags.panellink) {
 538                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
 539                                         if (minfo->outputs[2].src == MATROXFB_SRC_CRTC1) {
 540                                                 tmp = 0;
 541                                         }
 542                                 }
 543                                 if (put_user(tmp, (u_int32_t __user *)arg))
 544                                         return -EFAULT;
 545                                 return 0;
 546                         }
 547         }
 548         return -ENOTTY;
 549 #undef m2info
 550 }
 551
 552 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
 553 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 554         switch (blank) {
 555                 case 1:
 556                 case 2:
 557                 case 3:
 558                 case 4:
 559                 default:;
 560         }
 561         /* do something... */
 562         return 0;
 563 #undef m2info
 564 }
 565
 566 static struct fb_ops matroxfb_dh_ops = {
 567         .owner =        THIS_MODULE,
 568         .fb_open =      matroxfb_dh_open,
 569         .fb_release =   matroxfb_dh_release,
 570         .fb_check_var = matroxfb_dh_check_var,
 571         .fb_set_par =   matroxfb_dh_set_par,
 572         .fb_setcolreg = matroxfb_dh_setcolreg,
 573         .fb_pan_display =matroxfb_dh_pan_display,
 574         .fb_blank =     matroxfb_dh_blank,
 575         .fb_ioctl =     matroxfb_dh_ioctl,
 576         .fb_fillrect =  cfb_fillrect,
 577         .fb_copyarea =  cfb_copyarea,
 578         .fb_imageblit = cfb_imageblit,
 579 };
 580
 581 static struct fb_var_screeninfo matroxfb_dh_defined = {
 582                 640,480,640,480,/* W,H, virtual W,H */
 583                 0,0,            /* offset */
 584                 32,             /* depth */
 585                 0,              /* gray */
 586                 {0,0,0},        /* R */
 587                 {0,0,0},        /* G */
 588                 {0,0,0},        /* B */
 589                 {0,0,0},        /* alpha */
 590                 0,              /* nonstd */
 591                 FB_ACTIVATE_NOW,
 592                 -1,-1,          /* display size */
 593                 0,              /* accel flags */
 594                 39721L,48L,16L,33L,10L,
 595                 96L,2,0,        /* no sync info */
 596                 FB_VMODE_NONINTERLACED,
 597 };
 598
 599 static int matroxfb_dh_regit(const struct matrox_fb_info *minfo,
 600                              struct matroxfb_dh_fb_info *m2info)
 601 {
 602 #define minfo (m2info->primary_dev)
 603         void* oldcrtc2;
 604
 605         m2info->fbcon.fbops = &matroxfb_dh_ops;
 606         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
 607         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
 608                                FBINFO_HWACCEL_YPAN;
 609         m2info->fbcon.pseudo_palette = m2info->cmap;
 610         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
 611
 612         if (mem < 64)
 613                 mem *= 1024;
 614         if (mem < 64*1024)
 615                 mem *= 1024;
 616         mem &= ~0x00000FFF;     /* PAGE_MASK? */
 617         if (minfo->video.len_usable + mem <= minfo->video.len)
 618                 m2info->video.offbase = minfo->video.len - mem;
 619         else if (minfo->video.len < mem) {
 620                 return -ENOMEM;
 621         } else { /* check yres on first head... */
 622                 m2info->video.borrowed = mem;
 623                 minfo->video.len_usable -= mem;
 624                 m2info->video.offbase = minfo->video.len_usable;
 625         }
 626         m2info->video.base = minfo->video.base + m2info->video.offbase;
 627         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
 628         m2info->video.vbase.vaddr = vaddr_va(minfo->video.vbase) + m2info->video.offbase;
 629         m2info->mmio.base = minfo->mmio.base;
 630         m2info->mmio.vbase = minfo->mmio.vbase;
 631         m2info->mmio.len = minfo->mmio.len;
 632
 633         matroxfb_dh_init_fix(m2info);
 634         if (register_framebuffer(&m2info->fbcon)) {
 635                 return -ENXIO;
 636         }
 637         if (!m2info->initialized)
 638                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
 639         down_write(&minfo->crtc2.lock);
 640         oldcrtc2 = minfo->crtc2.info;
 641         minfo->crtc2.info = m2info;
 642         up_write(&minfo->crtc2.lock);
 643         if (oldcrtc2) {
 644                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
 645                         oldcrtc2);
 646         }
 647         return 0;
 648 #undef minfo
 649 }
 650
 651 /* ************************** */
 652
 653 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
 654 #define minfo (m2info->primary_dev)
 655         if (matroxfb_dh_regit(minfo, m2info)) {
 656                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
 657                 return -1;
 658         }
 659         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
 660                 minfo->fbcon.node, m2info->fbcon.node);
 661         m2info->fbcon_registered = 1;
 662         return 0;
 663 #undef minfo
 664 }
 665
 666 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
 667 #define minfo (m2info->primary_dev)
 668         if (m2info->fbcon_registered) {
 669                 int id;
 670                 struct matroxfb_dh_fb_info* crtc2;
 671
 672                 down_write(&minfo->crtc2.lock);
 673                 crtc2 = minfo->crtc2.info;
 674                 if (crtc2 == m2info)
 675                         minfo->crtc2.info = NULL;
 676                 up_write(&minfo->crtc2.lock);
 677                 if (crtc2 != m2info) {
 678                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
 679                                 crtc2, m2info);
 680                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
 681                         return;
 682                 }
 683                 id = m2info->fbcon.node;
 684                 unregister_framebuffer(&m2info->fbcon);
 685                 /* return memory back to primary head */
 686                 minfo->video.len_usable += m2info->video.borrowed;
 687                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
 688                 m2info->fbcon_registered = 0;
 689         }
 690 #undef minfo
 691 }
 692
 693 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
 694         struct matroxfb_dh_fb_info* m2info;
 695
 696         /* hardware is CRTC2 incapable... */
 697         if (!minfo->devflags.crtc2)
 698                 return NULL;
 699         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
 700         if (!m2info)
 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 */