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 <linux/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_pan_var(struct matroxfb_dh_fb_info* m2info,
 167                 struct fb_var_screeninfo* var) {
 168         unsigned int pos;
 169         unsigned int linelen;
 170         unsigned int pixelsize;
 171         MINFO_FROM(m2info->primary_dev);
 172
 173         m2info->fbcon.var.xoffset = var->xoffset;
 174         m2info->fbcon.var.yoffset = var->yoffset;
 175         pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
 176         linelen = m2info->fbcon.var.xres_virtual * pixelsize;
 177         pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
 178         pos += m2info->video.offbase;
 179         if (m2info->interlaced) {
 180                 mga_outl(0x3C2C, pos);
 181                 mga_outl(0x3C28, pos + linelen);
 182         } else {
 183                 mga_outl(0x3C28, pos);
 184         }
 185 }
 186
 187 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
 188                 struct fb_var_screeninfo* var,
 189                 int *visual,
 190                 int *video_cmap_len,
 191                 int *mode) {
 192         unsigned int mask;
 193         unsigned int memlen;
 194         unsigned int vramlen;
 195
 196         switch (var->bits_per_pixel) {
 197                 case 16:        mask = 0x1F;
 198                                 break;
 199                 case 32:        mask = 0x0F;
 200                                 break;
 201                 default:        return -EINVAL;
 202         }
 203         vramlen = m2info->video.len_usable;
 204         if (var->yres_virtual < var->yres)
 205                 var->yres_virtual = var->yres;
 206         if (var->xres_virtual < var->xres)
 207                 var->xres_virtual = var->xres;
 208         var->xres_virtual = (var->xres_virtual + mask) & ~mask;
 209         if (var->yres_virtual > 32767)
 210                 return -EINVAL;
 211         memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
 212         if (memlen > vramlen)
 213                 return -EINVAL;
 214         if (var->xoffset + var->xres > var->xres_virtual)
 215                 var->xoffset = var->xres_virtual - var->xres;
 216         if (var->yoffset + var->yres > var->yres_virtual)
 217                 var->yoffset = var->yres_virtual - var->yres;
 218
 219         var->xres &= ~7;
 220         var->left_margin &= ~7;
 221         var->right_margin &= ~7;
 222         var->hsync_len &= ~7;
 223
 224         *mode = var->bits_per_pixel;
 225         if (var->bits_per_pixel == 16) {
 226                 if (var->green.length == 5) {
 227                         var->red.offset = 10;
 228                         var->red.length = 5;
 229                         var->green.offset = 5;
 230                         var->green.length = 5;
 231                         var->blue.offset = 0;
 232                         var->blue.length = 5;
 233                         var->transp.offset = 15;
 234                         var->transp.length = 1;
 235                         *mode = 15;
 236                 } else {
 237                         var->red.offset = 11;
 238                         var->red.length = 5;
 239                         var->green.offset = 5;
 240                         var->green.length = 6;
 241                         var->blue.offset = 0;
 242                         var->blue.length = 5;
 243                         var->transp.offset = 0;
 244                         var->transp.length = 0;
 245                 }
 246         } else {
 247                         var->red.offset = 16;
 248                         var->red.length = 8;
 249                         var->green.offset = 8;
 250                         var->green.length = 8;
 251                         var->blue.offset = 0;
 252                         var->blue.length = 8;
 253                         var->transp.offset = 24;
 254                         var->transp.length = 8;
 255         }
 256         *visual = FB_VISUAL_TRUECOLOR;
 257         *video_cmap_len = 16;
 258         return 0;
 259 }
 260
 261 static int matroxfb_dh_open(struct fb_info* info, int user) {
 262 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 263         MINFO_FROM(m2info->primary_dev);
 264
 265         if (MINFO) {
 266                 int err;
 267
 268                 if (ACCESS_FBINFO(dead)) {
 269                         return -ENXIO;
 270                 }
 271                 err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
 272                 if (err) {
 273                         return err;
 274                 }
 275         }
 276         return 0;
 277 #undef m2info
 278 }
 279
 280 static int matroxfb_dh_release(struct fb_info* info, int user) {
 281 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 282         int err = 0;
 283         MINFO_FROM(m2info->primary_dev);
 284
 285         if (MINFO) {
 286                 err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
 287         }
 288         return err;
 289 #undef m2info
 290 }
 291
 292 /*
 293  * This function is called before the register_framebuffer so
 294  * no locking is needed.
 295  */
 296 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
 297 {
 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         }
 389         m2info->initialized = 1;
 390         return 0;
 391 #undef m2info
 392 }
 393
 394 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
 395 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 396         matroxfb_dh_pan_var(m2info, var);
 397         return 0;
 398 #undef m2info
 399 }
 400
 401 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
 402         MINFO_FROM(m2info->primary_dev);
 403
 404         matroxfb_enable_irq(PMINFO 0);
 405         memset(vblank, 0, sizeof(*vblank));
 406         vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
 407         /* mask out reserved bits + field number (odd/even) */
 408         vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
 409         /* compatibility stuff */
 410         if (vblank->vcount >= m2info->fbcon.var.yres)
 411                 vblank->flags |= FB_VBLANK_VBLANKING;
 412         if (test_bit(0, &ACCESS_FBINFO(irq_flags))) {
 413                 vblank->flags |= FB_VBLANK_HAVE_COUNT;
 414                 /* Only one writer, aligned int value...
 415                    it should work without lock and without atomic_t */
 416                 vblank->count = ACCESS_FBINFO(crtc2).vsync.cnt;
 417         }
 418         return 0;
 419 }
 420
 421 static int matroxfb_dh_ioctl(struct fb_info *info,
 422                 unsigned int cmd,
 423                 unsigned long arg)
 424 {
 425 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 426         MINFO_FROM(m2info->primary_dev);
 427
 428         DBG(__func__)
 429
 430         switch (cmd) {
 431                 case FBIOGET_VBLANK:
 432                         {
 433                                 struct fb_vblank vblank;
 434                                 int err;
 435
 436                                 err = matroxfb_dh_get_vblank(m2info, &vblank);
 437                                 if (err)
 438                                         return err;
 439                                 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
 440                                         return -EFAULT;
 441                                 return 0;
 442                         }
 443                 case FBIO_WAITFORVSYNC:
 444                         {
 445                                 u_int32_t crt;
 446
 447                                 if (get_user(crt, (u_int32_t __user *)arg))
 448                                         return -EFAULT;
 449
 450                                 if (crt != 0)
 451                                         return -ENODEV;
 452                                 return matroxfb_wait_for_sync(PMINFO 1);
 453                         }
 454                 case MATROXFB_SET_OUTPUT_MODE:
 455                 case MATROXFB_GET_OUTPUT_MODE:
 456                 case MATROXFB_GET_ALL_OUTPUTS:
 457                         {
 458                                 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(&ACCESS_FBINFO(fbcon), cmd, arg);
 459                         }
 460                 case MATROXFB_SET_OUTPUT_CONNECTION:
 461                         {
 462                                 u_int32_t tmp;
 463                                 int out;
 464                                 int changes;
 465
 466                                 if (get_user(tmp, (u_int32_t __user *)arg))
 467                                         return -EFAULT;
 468                                 for (out = 0; out < 32; out++) {
 469                                         if (tmp & (1 << out)) {
 470                                                 if (out >= MATROXFB_MAX_OUTPUTS)
 471                                                         return -ENXIO;
 472                                                 if (!ACCESS_FBINFO(outputs[out]).output)
 473                                                         return -ENXIO;
 474                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 475                                                         case MATROXFB_SRC_NONE:
 476                                                         case MATROXFB_SRC_CRTC2:
 477                                                                 break;
 478                                                         default:
 479                                                                 return -EBUSY;
 480                                                 }
 481                                         }
 482                                 }
 483                                 if (ACCESS_FBINFO(devflags.panellink)) {
 484                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
 485                                                 return -EINVAL;
 486                                         if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
 487                                                 return -EBUSY;
 488                                 }
 489                                 changes = 0;
 490                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 491                                         if (tmp & (1 << out)) {
 492                                                 if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
 493                                                         changes = 1;
 494                                                         ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
 495                                                 }
 496                                         } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 497                                                 changes = 1;
 498                                                 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
 499                                         }
 500                                 }
 501                                 if (!changes)
 502                                         return 0;
 503                                 matroxfb_dh_set_par(info);
 504                                 return 0;
 505                         }
 506                 case MATROXFB_GET_OUTPUT_CONNECTION:
 507                         {
 508                                 u_int32_t conn = 0;
 509                                 int out;
 510
 511                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 512                                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 513                                                 conn |= 1 << out;
 514                                         }
 515                                 }
 516                                 if (put_user(conn, (u_int32_t __user *)arg))
 517                                         return -EFAULT;
 518                                 return 0;
 519                         }
 520                 case MATROXFB_GET_AVAILABLE_OUTPUTS:
 521                         {
 522                                 u_int32_t tmp = 0;
 523                                 int out;
 524
 525                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 526                                         if (ACCESS_FBINFO(outputs[out]).output) {
 527                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 528                                                         case MATROXFB_SRC_NONE:
 529                                                         case MATROXFB_SRC_CRTC2:
 530                                                                 tmp |= 1 << out;
 531                                                                 break;
 532                                                 }
 533                                         }
 534                                 }
 535                                 if (ACCESS_FBINFO(devflags.panellink)) {
 536                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
 537                                         if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
 538                                                 tmp = 0;
 539                                         }
 540                                 }
 541                                 if (put_user(tmp, (u_int32_t __user *)arg))
 542                                         return -EFAULT;
 543                                 return 0;
 544                         }
 545         }
 546         return -ENOTTY;
 547 #undef m2info
 548 }
 549
 550 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
 551 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 552         switch (blank) {
 553                 case 1:
 554                 case 2:
 555                 case 3:
 556                 case 4:
 557                 default:;
 558         }
 559         /* do something... */
 560         return 0;
 561 #undef m2info
 562 }
 563
 564 static struct fb_ops matroxfb_dh_ops = {
 565         .owner =        THIS_MODULE,
 566         .fb_open =      matroxfb_dh_open,
 567         .fb_release =   matroxfb_dh_release,
 568         .fb_check_var = matroxfb_dh_check_var,
 569         .fb_set_par =   matroxfb_dh_set_par,
 570         .fb_setcolreg = matroxfb_dh_setcolreg,
 571         .fb_pan_display =matroxfb_dh_pan_display,
 572         .fb_blank =     matroxfb_dh_blank,
 573         .fb_ioctl =     matroxfb_dh_ioctl,
 574         .fb_fillrect =  cfb_fillrect,
 575         .fb_copyarea =  cfb_copyarea,
 576         .fb_imageblit = cfb_imageblit,
 577 };
 578
 579 static struct fb_var_screeninfo matroxfb_dh_defined = {
 580                 640,480,640,480,/* W,H, virtual W,H */
 581                 0,0,            /* offset */
 582                 32,             /* depth */
 583                 0,              /* gray */
 584                 {0,0,0},        /* R */
 585                 {0,0,0},        /* G */
 586                 {0,0,0},        /* B */
 587                 {0,0,0},        /* alpha */
 588                 0,              /* nonstd */
 589                 FB_ACTIVATE_NOW,
 590                 -1,-1,          /* display size */
 591                 0,              /* accel flags */
 592                 39721L,48L,16L,33L,10L,
 593                 96L,2,0,        /* no sync info */
 594                 FB_VMODE_NONINTERLACED,
 595                 0, {0,0,0,0,0}
 596 };
 597
 598 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
 599 #define minfo (m2info->primary_dev)
 600         void* oldcrtc2;
 601
 602         m2info->fbcon.fbops = &matroxfb_dh_ops;
 603         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
 604         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
 605                                FBINFO_HWACCEL_YPAN;
 606         m2info->fbcon.pseudo_palette = m2info->cmap;
 607         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
 608
 609         if (mem < 64)
 610                 mem *= 1024;
 611         if (mem < 64*1024)
 612                 mem *= 1024;
 613         mem &= ~0x00000FFF;     /* PAGE_MASK? */
 614         if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
 615                 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
 616         else if (ACCESS_FBINFO(video.len) < mem) {
 617                 return -ENOMEM;
 618         } else { /* check yres on first head... */
 619                 m2info->video.borrowed = mem;
 620                 ACCESS_FBINFO(video.len_usable) -= mem;
 621                 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
 622         }
 623         m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
 624         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
 625         m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
 626         m2info->mmio.base = ACCESS_FBINFO(mmio.base);
 627         m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
 628         m2info->mmio.len = ACCESS_FBINFO(mmio.len);
 629
 630         matroxfb_dh_init_fix(m2info);
 631         if (register_framebuffer(&m2info->fbcon)) {
 632                 return -ENXIO;
 633         }
 634         if (!m2info->initialized)
 635                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
 636         down_write(&ACCESS_FBINFO(crtc2.lock));
 637         oldcrtc2 = ACCESS_FBINFO(crtc2.info);
 638         ACCESS_FBINFO(crtc2.info) = m2info;
 639         up_write(&ACCESS_FBINFO(crtc2.lock));
 640         if (oldcrtc2) {
 641                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
 642                         oldcrtc2);
 643         }
 644         return 0;
 645 #undef minfo
 646 }
 647
 648 /* ************************** */
 649
 650 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
 651 #define minfo (m2info->primary_dev)
 652         if (matroxfb_dh_regit(PMINFO m2info)) {
 653                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
 654                 return -1;
 655         }
 656         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
 657                 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
 658         m2info->fbcon_registered = 1;
 659         return 0;
 660 #undef minfo
 661 }
 662
 663 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
 664 #define minfo (m2info->primary_dev)
 665         if (m2info->fbcon_registered) {
 666                 int id;
 667                 struct matroxfb_dh_fb_info* crtc2;
 668
 669                 down_write(&ACCESS_FBINFO(crtc2.lock));
 670                 crtc2 = ACCESS_FBINFO(crtc2.info);
 671                 if (crtc2 == m2info)
 672                         ACCESS_FBINFO(crtc2.info) = NULL;
 673                 up_write(&ACCESS_FBINFO(crtc2.lock));
 674                 if (crtc2 != m2info) {
 675                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
 676                                 crtc2, m2info);
 677                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
 678                         return;
 679                 }
 680                 id = m2info->fbcon.node;
 681                 unregister_framebuffer(&m2info->fbcon);
 682                 /* return memory back to primary head */
 683                 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
 684                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
 685                 m2info->fbcon_registered = 0;
 686         }
 687 #undef minfo
 688 }
 689
 690 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
 691         struct matroxfb_dh_fb_info* m2info;
 692
 693         /* hardware is CRTC2 incapable... */
 694         if (!ACCESS_FBINFO(devflags.crtc2))
 695                 return NULL;
 696         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
 697         if (!m2info) {
 698                 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
 699                 return NULL;
 700         }
 701         m2info->primary_dev = MINFO;
 702         if (matroxfb_dh_registerfb(m2info)) {
 703                 kfree(m2info);
 704                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
 705                 return NULL;
 706         }
 707         return m2info;
 708 }
 709
 710 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
 711         matroxfb_dh_deregisterfb(crtc2);
 712         kfree(crtc2);
 713 }
 714
 715 static struct matroxfb_driver crtc2 = {
 716                 .name =         "Matrox G400 CRTC2",
 717                 .probe =        matroxfb_crtc2_probe,
 718                 .remove =       matroxfb_crtc2_remove };
 719
 720 static int matroxfb_crtc2_init(void) {
 721         if (fb_get_options("matrox_crtc2fb", NULL))
 722                 return -ENODEV;
 723
 724         matroxfb_register_driver(&crtc2);
 725         return 0;
 726 }
 727
 728 static void matroxfb_crtc2_exit(void) {
 729         matroxfb_unregister_driver(&crtc2);
 730 }
 731
 732 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
 733 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
 734 MODULE_LICENSE("GPL");
 735 module_init(matroxfb_crtc2_init);
 736 module_exit(matroxfb_crtc2_exit);
 737 /* we do not have __setup() yet */