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 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
 293 {
 294         struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
 295
 296         strcpy(fix->id, "MATROX DH");
 297
 298         mutex_lock(&m2info->fbcon.mm_lock);
 299         fix->smem_start = m2info->video.base;
 300         fix->smem_len = m2info->video.len_usable;
 301         mutex_unlock(&m2info->fbcon.mm_lock);
 302         fix->ypanstep = 1;
 303         fix->ywrapstep = 0;
 304         fix->xpanstep = 8;      /* TBD */
 305         fix->mmio_start = m2info->mmio.base;
 306         fix->mmio_len = m2info->mmio.len;
 307         fix->accel = 0;         /* no accel... */
 308 }
 309
 310 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
 311 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 312         int visual;
 313         int cmap_len;
 314         int mode;
 315
 316         return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
 317 #undef m2info
 318 }
 319
 320 static int matroxfb_dh_set_par(struct fb_info* info) {
 321 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 322         int visual;
 323         int cmap_len;
 324         int mode;
 325         int err;
 326         struct fb_var_screeninfo* var = &info->var;
 327         MINFO_FROM(m2info->primary_dev);
 328
 329         if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
 330                 return err;
 331         /* cmap */
 332         {
 333                 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
 334                 m2info->fbcon.fix.visual = visual;
 335                 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
 336                 m2info->fbcon.fix.type_aux = 0;
 337                 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
 338         }
 339         {
 340                 struct my_timming mt;
 341                 unsigned int pos;
 342                 int out;
 343                 int cnt;
 344
 345                 matroxfb_var2my(&m2info->fbcon.var, &mt);
 346                 mt.crtc = MATROXFB_SRC_CRTC2;
 347                 /* CRTC2 delay */
 348                 mt.delay = 34;
 349
 350                 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
 351                 pos += m2info->video.offbase;
 352                 cnt = 0;
 353                 down_read(&ACCESS_FBINFO(altout).lock);
 354                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 355                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 356                                 cnt++;
 357                                 if (ACCESS_FBINFO(outputs[out]).output->compute) {
 358                                         ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
 359                                 }
 360                         }
 361                 }
 362                 ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
 363                 ACCESS_FBINFO(crtc2).mnp = mt.mnp;
 364                 up_read(&ACCESS_FBINFO(altout).lock);
 365                 if (cnt) {
 366                         matroxfb_dh_restore(m2info, &mt, mode, pos);
 367                 } else {
 368                         matroxfb_dh_disable(m2info);
 369                 }
 370                 DAC1064_global_init(PMINFO2);
 371                 DAC1064_global_restore(PMINFO2);
 372                 down_read(&ACCESS_FBINFO(altout).lock);
 373                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 374                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
 375                             ACCESS_FBINFO(outputs[out]).output->program) {
 376                                 ACCESS_FBINFO(outputs[out]).output->program(ACCESS_FBINFO(outputs[out]).data);
 377                         }
 378                 }
 379                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 380                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
 381                             ACCESS_FBINFO(outputs[out]).output->start) {
 382                                 ACCESS_FBINFO(outputs[out]).output->start(ACCESS_FBINFO(outputs[out]).data);
 383                         }
 384                 }
 385                 up_read(&ACCESS_FBINFO(altout).lock);
 386         }
 387         m2info->initialized = 1;
 388         return 0;
 389 #undef m2info
 390 }
 391
 392 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
 393 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 394         matroxfb_dh_pan_var(m2info, var);
 395         return 0;
 396 #undef m2info
 397 }
 398
 399 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
 400         MINFO_FROM(m2info->primary_dev);
 401
 402         matroxfb_enable_irq(PMINFO 0);
 403         memset(vblank, 0, sizeof(*vblank));
 404         vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
 405         /* mask out reserved bits + field number (odd/even) */
 406         vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
 407         /* compatibility stuff */
 408         if (vblank->vcount >= m2info->fbcon.var.yres)
 409                 vblank->flags |= FB_VBLANK_VBLANKING;
 410         if (test_bit(0, &ACCESS_FBINFO(irq_flags))) {
 411                 vblank->flags |= FB_VBLANK_HAVE_COUNT;
 412                 /* Only one writer, aligned int value...
 413                    it should work without lock and without atomic_t */
 414                 vblank->count = ACCESS_FBINFO(crtc2).vsync.cnt;
 415         }
 416         return 0;
 417 }
 418
 419 static int matroxfb_dh_ioctl(struct fb_info *info,
 420                 unsigned int cmd,
 421                 unsigned long arg)
 422 {
 423 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 424         MINFO_FROM(m2info->primary_dev);
 425
 426         DBG(__func__)
 427
 428         switch (cmd) {
 429                 case FBIOGET_VBLANK:
 430                         {
 431                                 struct fb_vblank vblank;
 432                                 int err;
 433
 434                                 err = matroxfb_dh_get_vblank(m2info, &vblank);
 435                                 if (err)
 436                                         return err;
 437                                 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
 438                                         return -EFAULT;
 439                                 return 0;
 440                         }
 441                 case FBIO_WAITFORVSYNC:
 442                         {
 443                                 u_int32_t crt;
 444
 445                                 if (get_user(crt, (u_int32_t __user *)arg))
 446                                         return -EFAULT;
 447
 448                                 if (crt != 0)
 449                                         return -ENODEV;
 450                                 return matroxfb_wait_for_sync(PMINFO 1);
 451                         }
 452                 case MATROXFB_SET_OUTPUT_MODE:
 453                 case MATROXFB_GET_OUTPUT_MODE:
 454                 case MATROXFB_GET_ALL_OUTPUTS:
 455                         {
 456                                 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(&ACCESS_FBINFO(fbcon), cmd, arg);
 457                         }
 458                 case MATROXFB_SET_OUTPUT_CONNECTION:
 459                         {
 460                                 u_int32_t tmp;
 461                                 int out;
 462                                 int changes;
 463
 464                                 if (get_user(tmp, (u_int32_t __user *)arg))
 465                                         return -EFAULT;
 466                                 for (out = 0; out < 32; out++) {
 467                                         if (tmp & (1 << out)) {
 468                                                 if (out >= MATROXFB_MAX_OUTPUTS)
 469                                                         return -ENXIO;
 470                                                 if (!ACCESS_FBINFO(outputs[out]).output)
 471                                                         return -ENXIO;
 472                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 473                                                         case MATROXFB_SRC_NONE:
 474                                                         case MATROXFB_SRC_CRTC2:
 475                                                                 break;
 476                                                         default:
 477                                                                 return -EBUSY;
 478                                                 }
 479                                         }
 480                                 }
 481                                 if (ACCESS_FBINFO(devflags.panellink)) {
 482                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
 483                                                 return -EINVAL;
 484                                         if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
 485                                                 return -EBUSY;
 486                                 }
 487                                 changes = 0;
 488                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 489                                         if (tmp & (1 << out)) {
 490                                                 if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
 491                                                         changes = 1;
 492                                                         ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
 493                                                 }
 494                                         } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 495                                                 changes = 1;
 496                                                 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
 497                                         }
 498                                 }
 499                                 if (!changes)
 500                                         return 0;
 501                                 matroxfb_dh_set_par(info);
 502                                 return 0;
 503                         }
 504                 case MATROXFB_GET_OUTPUT_CONNECTION:
 505                         {
 506                                 u_int32_t conn = 0;
 507                                 int out;
 508
 509                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 510                                         if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
 511                                                 conn |= 1 << out;
 512                                         }
 513                                 }
 514                                 if (put_user(conn, (u_int32_t __user *)arg))
 515                                         return -EFAULT;
 516                                 return 0;
 517                         }
 518                 case MATROXFB_GET_AVAILABLE_OUTPUTS:
 519                         {
 520                                 u_int32_t tmp = 0;
 521                                 int out;
 522
 523                                 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
 524                                         if (ACCESS_FBINFO(outputs[out]).output) {
 525                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
 526                                                         case MATROXFB_SRC_NONE:
 527                                                         case MATROXFB_SRC_CRTC2:
 528                                                                 tmp |= 1 << out;
 529                                                                 break;
 530                                                 }
 531                                         }
 532                                 }
 533                                 if (ACCESS_FBINFO(devflags.panellink)) {
 534                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
 535                                         if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
 536                                                 tmp = 0;
 537                                         }
 538                                 }
 539                                 if (put_user(tmp, (u_int32_t __user *)arg))
 540                                         return -EFAULT;
 541                                 return 0;
 542                         }
 543         }
 544         return -ENOTTY;
 545 #undef m2info
 546 }
 547
 548 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
 549 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
 550         switch (blank) {
 551                 case 1:
 552                 case 2:
 553                 case 3:
 554                 case 4:
 555                 default:;
 556         }
 557         /* do something... */
 558         return 0;
 559 #undef m2info
 560 }
 561
 562 static struct fb_ops matroxfb_dh_ops = {
 563         .owner =        THIS_MODULE,
 564         .fb_open =      matroxfb_dh_open,
 565         .fb_release =   matroxfb_dh_release,
 566         .fb_check_var = matroxfb_dh_check_var,
 567         .fb_set_par =   matroxfb_dh_set_par,
 568         .fb_setcolreg = matroxfb_dh_setcolreg,
 569         .fb_pan_display =matroxfb_dh_pan_display,
 570         .fb_blank =     matroxfb_dh_blank,
 571         .fb_ioctl =     matroxfb_dh_ioctl,
 572         .fb_fillrect =  cfb_fillrect,
 573         .fb_copyarea =  cfb_copyarea,
 574         .fb_imageblit = cfb_imageblit,
 575 };
 576
 577 static struct fb_var_screeninfo matroxfb_dh_defined = {
 578                 640,480,640,480,/* W,H, virtual W,H */
 579                 0,0,            /* offset */
 580                 32,             /* depth */
 581                 0,              /* gray */
 582                 {0,0,0},        /* R */
 583                 {0,0,0},        /* G */
 584                 {0,0,0},        /* B */
 585                 {0,0,0},        /* alpha */
 586                 0,              /* nonstd */
 587                 FB_ACTIVATE_NOW,
 588                 -1,-1,          /* display size */
 589                 0,              /* accel flags */
 590                 39721L,48L,16L,33L,10L,
 591                 96L,2,0,        /* no sync info */
 592                 FB_VMODE_NONINTERLACED,
 593                 0, {0,0,0,0,0}
 594 };
 595
 596 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
 597 #define minfo (m2info->primary_dev)
 598         void* oldcrtc2;
 599
 600         m2info->fbcon.fbops = &matroxfb_dh_ops;
 601         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
 602         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
 603                                FBINFO_HWACCEL_YPAN;
 604         m2info->fbcon.pseudo_palette = m2info->cmap;
 605         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
 606
 607         if (mem < 64)
 608                 mem *= 1024;
 609         if (mem < 64*1024)
 610                 mem *= 1024;
 611         mem &= ~0x00000FFF;     /* PAGE_MASK? */
 612         if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
 613                 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
 614         else if (ACCESS_FBINFO(video.len) < mem) {
 615                 return -ENOMEM;
 616         } else { /* check yres on first head... */
 617                 m2info->video.borrowed = mem;
 618                 ACCESS_FBINFO(video.len_usable) -= mem;
 619                 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
 620         }
 621         m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
 622         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
 623         m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
 624         m2info->mmio.base = ACCESS_FBINFO(mmio.base);
 625         m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
 626         m2info->mmio.len = ACCESS_FBINFO(mmio.len);
 627
 628         matroxfb_dh_init_fix(m2info);
 629         if (register_framebuffer(&m2info->fbcon)) {
 630                 return -ENXIO;
 631         }
 632         if (!m2info->initialized)
 633                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
 634         down_write(&ACCESS_FBINFO(crtc2.lock));
 635         oldcrtc2 = ACCESS_FBINFO(crtc2.info);
 636         ACCESS_FBINFO(crtc2.info) = m2info;
 637         up_write(&ACCESS_FBINFO(crtc2.lock));
 638         if (oldcrtc2) {
 639                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
 640                         oldcrtc2);
 641         }
 642         return 0;
 643 #undef minfo
 644 }
 645
 646 /* ************************** */
 647
 648 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
 649 #define minfo (m2info->primary_dev)
 650         if (matroxfb_dh_regit(PMINFO m2info)) {
 651                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
 652                 return -1;
 653         }
 654         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
 655                 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
 656         m2info->fbcon_registered = 1;
 657         return 0;
 658 #undef minfo
 659 }
 660
 661 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
 662 #define minfo (m2info->primary_dev)
 663         if (m2info->fbcon_registered) {
 664                 int id;
 665                 struct matroxfb_dh_fb_info* crtc2;
 666
 667                 down_write(&ACCESS_FBINFO(crtc2.lock));
 668                 crtc2 = ACCESS_FBINFO(crtc2.info);
 669                 if (crtc2 == m2info)
 670                         ACCESS_FBINFO(crtc2.info) = NULL;
 671                 up_write(&ACCESS_FBINFO(crtc2.lock));
 672                 if (crtc2 != m2info) {
 673                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
 674                                 crtc2, m2info);
 675                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
 676                         return;
 677                 }
 678                 id = m2info->fbcon.node;
 679                 unregister_framebuffer(&m2info->fbcon);
 680                 /* return memory back to primary head */
 681                 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
 682                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
 683                 m2info->fbcon_registered = 0;
 684         }
 685 #undef minfo
 686 }
 687
 688 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
 689         struct matroxfb_dh_fb_info* m2info;
 690
 691         /* hardware is CRTC2 incapable... */
 692         if (!ACCESS_FBINFO(devflags.crtc2))
 693                 return NULL;
 694         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
 695         if (!m2info) {
 696                 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
 697                 return NULL;
 698         }
 699         m2info->primary_dev = MINFO;
 700         if (matroxfb_dh_registerfb(m2info)) {
 701                 kfree(m2info);
 702                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
 703                 return NULL;
 704         }
 705         return m2info;
 706 }
 707
 708 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
 709         matroxfb_dh_deregisterfb(crtc2);
 710         kfree(crtc2);
 711 }
 712
 713 static struct matroxfb_driver crtc2 = {
 714                 .name =         "Matrox G400 CRTC2",
 715                 .probe =        matroxfb_crtc2_probe,
 716                 .remove =       matroxfb_crtc2_remove };
 717
 718 static int matroxfb_crtc2_init(void) {
 719         if (fb_get_options("matrox_crtc2fb", NULL))
 720                 return -ENODEV;
 721
 722         matroxfb_register_driver(&crtc2);
 723         return 0;
 724 }
 725
 726 static void matroxfb_crtc2_exit(void) {
 727         matroxfb_unregister_driver(&crtc2);
 728 }
 729
 730 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
 731 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
 732 MODULE_LICENSE("GPL");
 733 module_init(matroxfb_crtc2_init);
 734 module_exit(matroxfb_crtc2_exit);
 735 /* we do not have __setup() yet */