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