drivers/video/sgivwfb.c

   1 /*
   2  *  linux/drivers/video/sgivwfb.c -- SGI DBE frame buffer device
   3  *
   4  *      Copyright (C) 1999 Silicon Graphics, Inc.
   5  *      Jeffrey Newquist, newquist@engr.sgi.som
   6  *
   7  *  This file is subject to the terms and conditions of the GNU General Public
   8  *  License. See the file COPYING in the main directory of this archive for
   9  *  more details.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/mm.h>
  16 #include <linux/errno.h>
  17 #include <linux/delay.h>
  18 #include <linux/fb.h>
  19 #include <linux/init.h>
  20 #include <linux/ioport.h>
  21 #include <asm/io.h>
  22 #include <asm/mtrr.h>
  23
  24 #define INCLUDE_TIMING_TABLE_DATA
  25 #define DBE_REG_BASE par->regs
  26 #include <video/sgivw.h>
  27
  28 struct sgivw_par {
  29         struct asregs *regs;
  30         u32 cmap_fifo;
  31         u_long timing_num;
  32 };
  33
  34 #define FLATPANEL_SGI_1600SW    5
  35
  36 /*
  37  *  RAM we reserve for the frame buffer. This defines the maximum screen
  38  *  size
  39  *
  40  *  The default can be overridden if the driver is compiled as a module
  41  */
  42
  43 /* set by arch/i386/kernel/setup.c */
  44 extern unsigned long sgivwfb_mem_phys;
  45 extern unsigned long sgivwfb_mem_size;
  46
  47 static int ypan = 0;
  48 static int ywrap = 0;
  49
  50 static int flatpanel_id = -1;
  51
  52 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
  53         .id             = "SGI Vis WS FB",
  54         .type           = FB_TYPE_PACKED_PIXELS,
  55         .visual         = FB_VISUAL_PSEUDOCOLOR,
  56         .mmio_start     = DBE_REG_PHYS,
  57         .mmio_len       = DBE_REG_SIZE,
  58         .accel          = FB_ACCEL_NONE,
  59         .line_length    = 640,
  60 };
  61
  62 static struct fb_var_screeninfo sgivwfb_var __initdata = {
  63         /* 640x480, 8 bpp */
  64         .xres           = 640,
  65         .yres           = 480,
  66         .xres_virtual   = 640,
  67         .yres_virtual   = 480,
  68         .bits_per_pixel = 8,
  69         .red            = { 0, 8, 0 },
  70         .green          = { 0, 8, 0 },
  71         .blue           = { 0, 8, 0 },
  72         .height         = -1,
  73         .width          = -1,
  74         .pixclock       = 20000,
  75         .left_margin    = 64,
  76         .right_margin   = 64,
  77         .upper_margin   = 32,
  78         .lower_margin   = 32,
  79         .hsync_len      = 64,
  80         .vsync_len      = 2,
  81         .vmode          = FB_VMODE_NONINTERLACED
  82 };
  83
  84 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
  85         /* 1600x1024, 8 bpp */
  86         .xres           = 1600,
  87         .yres           = 1024,
  88         .xres_virtual   = 1600,
  89         .yres_virtual   = 1024,
  90         .bits_per_pixel = 8,
  91         .red            = { 0, 8, 0 },
  92         .green          = { 0, 8, 0 },
  93         .blue           = { 0, 8, 0 },
  94         .height         = -1,
  95         .width          = -1,
  96         .pixclock       = 9353,
  97         .left_margin    = 20,
  98         .right_margin   = 30,
  99         .upper_margin   = 37,
 100         .lower_margin   = 3,
 101         .hsync_len      = 20,
 102         .vsync_len      = 3,
 103         .vmode          = FB_VMODE_NONINTERLACED
 104 };
 105
 106 /*
 107  *  Interface used by the world
 108  */
 109 int sgivwfb_init(void);
 110
 111 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
 112 static int sgivwfb_set_par(struct fb_info *info);
 113 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
 114                              u_int blue, u_int transp,
 115                              struct fb_info *info);
 116 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
 117                         struct vm_area_struct *vma);
 118
 119 static struct fb_ops sgivwfb_ops = {
 120         .owner          = THIS_MODULE,
 121         .fb_check_var   = sgivwfb_check_var,
 122         .fb_set_par     = sgivwfb_set_par,
 123         .fb_setcolreg   = sgivwfb_setcolreg,
 124         .fb_fillrect    = cfb_fillrect,
 125         .fb_copyarea    = cfb_copyarea,
 126         .fb_imageblit   = cfb_imageblit,
 127         .fb_cursor      = soft_cursor,
 128         .fb_mmap        = sgivwfb_mmap,
 129 };
 130
 131 /*
 132  *  Internal routines
 133  */
 134 static unsigned long bytes_per_pixel(int bpp)
 135 {
 136         switch (bpp) {
 137                 case 8:
 138                         return 1;
 139                 case 16:
 140                         return 2;
 141                 case 32:
 142                         return 4;
 143                 default:
 144                         printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
 145                         return 0;
 146         }
 147 }
 148
 149 static unsigned long get_line_length(int xres_virtual, int bpp)
 150 {
 151         return (xres_virtual * bytes_per_pixel(bpp));
 152 }
 153
 154 /*
 155  * Function:    dbe_TurnOffDma
 156  * Parameters:  (None)
 157  * Description: This should turn off the monitor and dbe.  This is used
 158  *              when switching between the serial console and the graphics
 159  *              console.
 160  */
 161
 162 static void dbe_TurnOffDma(struct sgivw_par *par)
 163 {
 164         unsigned int readVal;
 165         int i;
 166
 167         // Check to see if things are already turned off:
 168         // 1) Check to see if dbe is not using the internal dotclock.
 169         // 2) Check to see if the xy counter in dbe is already off.
 170
 171         DBE_GETREG(ctrlstat, readVal);
 172         if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
 173                 return;
 174
 175         DBE_GETREG(vt_xy, readVal);
 176         if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
 177                 return;
 178
 179         // Otherwise, turn off dbe
 180
 181         DBE_GETREG(ovr_control, readVal);
 182         SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
 183         DBE_SETREG(ovr_control, readVal);
 184         udelay(1000);
 185         DBE_GETREG(frm_control, readVal);
 186         SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
 187         DBE_SETREG(frm_control, readVal);
 188         udelay(1000);
 189         DBE_GETREG(did_control, readVal);
 190         SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
 191         DBE_SETREG(did_control, readVal);
 192         udelay(1000);
 193
 194         // XXX HACK:
 195         //
 196         //    This was necessary for GBE--we had to wait through two
 197         //    vertical retrace periods before the pixel DMA was
 198         //    turned off for sure.  I've left this in for now, in
 199         //    case dbe needs it.
 200
 201         for (i = 0; i < 10000; i++) {
 202                 DBE_GETREG(frm_inhwctrl, readVal);
 203                 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
 204                     0)
 205                         udelay(10);
 206                 else {
 207                         DBE_GETREG(ovr_inhwctrl, readVal);
 208                         if (GET_DBE_FIELD
 209                             (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
 210                                 udelay(10);
 211                         else {
 212                                 DBE_GETREG(did_inhwctrl, readVal);
 213                                 if (GET_DBE_FIELD
 214                                     (DID_INHWCTRL, DID_DMA_ENABLE,
 215                                      readVal) == 0)
 216                                         udelay(10);
 217                                 else
 218                                         break;
 219                         }
 220                 }
 221         }
 222 }
 223
 224 /*
 225  *  Set the User Defined Part of the Display. Again if par use it to get
 226  *  real video mode.
 227  */
 228 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
 229                              struct fb_info *info)
 230 {
 231         struct sgivw_par *par = (struct sgivw_par *)info->par;
 232         struct dbe_timing_info *timing;
 233         u_long line_length;
 234         u_long min_mode;
 235         int req_dot;
 236         int test_mode;
 237
 238         /*
 239          *  FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
 240          *  as FB_VMODE_SMOOTH_XPAN is only used internally
 241          */
 242
 243         if (var->vmode & FB_VMODE_CONUPDATE) {
 244                 var->vmode |= FB_VMODE_YWRAP;
 245                 var->xoffset = info->var.xoffset;
 246                 var->yoffset = info->var.yoffset;
 247         }
 248
 249         /* XXX FIXME - forcing var's */
 250         var->xoffset = 0;
 251         var->yoffset = 0;
 252
 253         /* Limit bpp to 8, 16, and 32 */
 254         if (var->bits_per_pixel <= 8)
 255                 var->bits_per_pixel = 8;
 256         else if (var->bits_per_pixel <= 16)
 257                 var->bits_per_pixel = 16;
 258         else if (var->bits_per_pixel <= 32)
 259                 var->bits_per_pixel = 32;
 260         else
 261                 return -EINVAL;
 262
 263         var->grayscale = 0;     /* No grayscale for now */
 264
 265         /* determine valid resolution and timing */
 266         for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
 267                 if (dbeVTimings[min_mode].width >= var->xres &&
 268                     dbeVTimings[min_mode].height >= var->yres)
 269                         break;
 270         }
 271
 272         if (min_mode == DBE_VT_SIZE)
 273                 return -EINVAL; /* Resolution to high */
 274
 275         /* XXX FIXME - should try to pick best refresh rate */
 276         /* for now, pick closest dot-clock within 3MHz */
 277         req_dot = PICOS2KHZ(var->pixclock);
 278         printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
 279                var->pixclock, req_dot);
 280         test_mode = min_mode;
 281         while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
 282                 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
 283                         break;
 284                 test_mode++;
 285         }
 286         if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
 287                 test_mode--;
 288         min_mode = test_mode;
 289         timing = &dbeVTimings[min_mode];
 290         printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
 291
 292         /* Adjust virtual resolution, if necessary */
 293         if (var->xres > var->xres_virtual || (!ywrap && !ypan))
 294                 var->xres_virtual = var->xres;
 295         if (var->yres > var->yres_virtual || (!ywrap && !ypan))
 296                 var->yres_virtual = var->yres;
 297
 298         /*
 299          *  Memory limit
 300          */
 301         line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
 302         if (line_length * var->yres_virtual > sgivwfb_mem_size)
 303                 return -ENOMEM; /* Virtual resolution to high */
 304
 305         info->fix.line_length = line_length;
 306
 307         switch (var->bits_per_pixel) {
 308         case 8:
 309                 var->red.offset = 0;
 310                 var->red.length = 8;
 311                 var->green.offset = 0;
 312                 var->green.length = 8;
 313                 var->blue.offset = 0;
 314                 var->blue.length = 8;
 315                 var->transp.offset = 0;
 316                 var->transp.length = 0;
 317                 break;
 318         case 16:                /* RGBA 5551 */
 319                 var->red.offset = 11;
 320                 var->red.length = 5;
 321                 var->green.offset = 6;
 322                 var->green.length = 5;
 323                 var->blue.offset = 1;
 324                 var->blue.length = 5;
 325                 var->transp.offset = 0;
 326                 var->transp.length = 0;
 327                 break;
 328         case 32:                /* RGB 8888 */
 329                 var->red.offset = 0;
 330                 var->red.length = 8;
 331                 var->green.offset = 8;
 332                 var->green.length = 8;
 333                 var->blue.offset = 16;
 334                 var->blue.length = 8;
 335                 var->transp.offset = 24;
 336                 var->transp.length = 8;
 337                 break;
 338         }
 339         var->red.msb_right = 0;
 340         var->green.msb_right = 0;
 341         var->blue.msb_right = 0;
 342         var->transp.msb_right = 0;
 343
 344         /* set video timing information */
 345         var->pixclock = KHZ2PICOS(timing->cfreq);
 346         var->left_margin = timing->htotal - timing->hsync_end;
 347         var->right_margin = timing->hsync_start - timing->width;
 348         var->upper_margin = timing->vtotal - timing->vsync_end;
 349         var->lower_margin = timing->vsync_start - timing->height;
 350         var->hsync_len = timing->hsync_end - timing->hsync_start;
 351         var->vsync_len = timing->vsync_end - timing->vsync_start;
 352
 353         /* Ouch. This breaks the rules but timing_num is only important if you
 354         * change a video mode */
 355         par->timing_num = min_mode;
 356
 357         printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
 358                 var->xres, var->yres, var->bits_per_pixel);
 359         printk(KERN_INFO "         vxres=%d vyres=%d\n", var->xres_virtual,
 360                 var->yres_virtual);
 361         return 0;
 362 }
 363
 364 /*
 365  *  Setup flatpanel related registers.
 366  */
 367 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
 368 {
 369         int fp_wid, fp_hgt, fp_vbs, fp_vbe;
 370         u32 outputVal = 0;
 371
 372         SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
 373                 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
 374         SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
 375                 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
 376         DBE_SETREG(vt_flags, outputVal);
 377
 378         /* Turn on the flat panel */
 379         switch (flatpanel_id) {
 380                 case FLATPANEL_SGI_1600SW:
 381                         fp_wid = 1600;
 382                         fp_hgt = 1024;
 383                         fp_vbs = 0;
 384                         fp_vbe = 1600;
 385                         currentTiming->pll_m = 4;
 386                         currentTiming->pll_n = 1;
 387                         currentTiming->pll_p = 0;
 388                         break;
 389                 default:
 390                         fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
 391         }
 392
 393         outputVal = 0;
 394         SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
 395         SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
 396         DBE_SETREG(fp_de, outputVal);
 397         outputVal = 0;
 398         SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
 399         DBE_SETREG(fp_hdrv, outputVal);
 400         outputVal = 0;
 401         SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
 402         SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
 403         DBE_SETREG(fp_vdrv, outputVal);
 404 }
 405
 406 /*
 407  *  Set the hardware according to 'par'.
 408  */
 409 static int sgivwfb_set_par(struct fb_info *info)
 410 {
 411         struct sgivw_par *par = info->par;
 412         int i, j, htmp, temp;
 413         u32 readVal, outputVal;
 414         int wholeTilesX, maxPixelsPerTileX;
 415         int frmWrite1, frmWrite2, frmWrite3b;
 416         struct dbe_timing_info *currentTiming; /* Current Video Timing */
 417         int xpmax, ypmax;       // Monitor resolution
 418         int bytesPerPixel;      // Bytes per pixel
 419
 420         currentTiming = &dbeVTimings[par->timing_num];
 421         bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
 422         xpmax = currentTiming->width;
 423         ypmax = currentTiming->height;
 424
 425         /* dbe_InitGraphicsBase(); */
 426         /* Turn on dotclock PLL */
 427         DBE_SETREG(ctrlstat, 0x20000000);
 428
 429         dbe_TurnOffDma(par);
 430
 431         /* dbe_CalculateScreenParams(); */
 432         maxPixelsPerTileX = 512 / bytesPerPixel;
 433         wholeTilesX = xpmax / maxPixelsPerTileX;
 434         if (wholeTilesX * maxPixelsPerTileX < xpmax)
 435                 wholeTilesX++;
 436
 437         printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
 438                maxPixelsPerTileX, wholeTilesX);
 439
 440         /* dbe_InitGammaMap(); */
 441         udelay(10);
 442
 443         for (i = 0; i < 256; i++) {
 444                 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
 445         }
 446
 447         /* dbe_TurnOn(); */
 448         DBE_GETREG(vt_xy, readVal);
 449         if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
 450                 DBE_SETREG(vt_xy, 0x00000000);
 451                 udelay(1);
 452         } else
 453                 dbe_TurnOffDma(par);
 454
 455         /* dbe_Initdbe(); */
 456         for (i = 0; i < 256; i++) {
 457                 for (j = 0; j < 100; j++) {
 458                         DBE_GETREG(cm_fifo, readVal);
 459                         if (readVal != 0x00000000)
 460                                 break;
 461                         else
 462                                 udelay(10);
 463                 }
 464
 465                 // DBE_ISETREG(cmap, i, 0x00000000);
 466                 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
 467         }
 468
 469         /* dbe_InitFramebuffer(); */
 470         frmWrite1 = 0;
 471         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
 472                       wholeTilesX);
 473         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
 474
 475         switch (bytesPerPixel) {
 476         case 1:
 477                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 478                               DBE_FRM_DEPTH_8);
 479                 break;
 480         case 2:
 481                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 482                               DBE_FRM_DEPTH_16);
 483                 break;
 484         case 4:
 485                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 486                               DBE_FRM_DEPTH_32);
 487                 break;
 488         }
 489
 490         frmWrite2 = 0;
 491         SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
 492
 493         // Tell dbe about the framebuffer location and type
 494         // XXX What format is the FRM_TILE_PTR??  64K aligned address?
 495         frmWrite3b = 0;
 496         SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
 497                       sgivwfb_mem_phys >> 9);
 498         SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
 499         SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
 500
 501         /* Initialize DIDs */
 502
 503         outputVal = 0;
 504         switch (bytesPerPixel) {
 505         case 1:
 506                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
 507                 break;
 508         case 2:
 509                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
 510                 break;
 511         case 4:
 512                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
 513                 break;
 514         }
 515         SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
 516
 517         for (i = 0; i < 32; i++) {
 518                 DBE_ISETREG(mode_regs, i, outputVal);
 519         }
 520
 521         /* dbe_InitTiming(); */
 522         DBE_SETREG(vt_intr01, 0xffffffff);
 523         DBE_SETREG(vt_intr23, 0xffffffff);
 524
 525         DBE_GETREG(dotclock, readVal);
 526         DBE_SETREG(dotclock, readVal & 0xffff);
 527
 528         DBE_SETREG(vt_xymax, 0x00000000);
 529         outputVal = 0;
 530         SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
 531                       currentTiming->vsync_start);
 532         SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
 533                       currentTiming->vsync_end);
 534         DBE_SETREG(vt_vsync, outputVal);
 535         outputVal = 0;
 536         SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
 537                       currentTiming->hsync_start);
 538         SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
 539                       currentTiming->hsync_end);
 540         DBE_SETREG(vt_hsync, outputVal);
 541         outputVal = 0;
 542         SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
 543                       currentTiming->vblank_start);
 544         SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
 545                       currentTiming->vblank_end);
 546         DBE_SETREG(vt_vblank, outputVal);
 547         outputVal = 0;
 548         SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
 549                       currentTiming->hblank_start);
 550         SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
 551                       currentTiming->hblank_end - 3);
 552         DBE_SETREG(vt_hblank, outputVal);
 553         outputVal = 0;
 554         SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
 555                       currentTiming->vblank_start);
 556         SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
 557                       currentTiming->vblank_end);
 558         DBE_SETREG(vt_vcmap, outputVal);
 559         outputVal = 0;
 560         SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
 561                       currentTiming->hblank_start);
 562         SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
 563                       currentTiming->hblank_end - 3);
 564         DBE_SETREG(vt_hcmap, outputVal);
 565
 566         if (flatpanel_id != -1)
 567                 sgivwfb_setup_flatpanel(par, currentTiming);
 568
 569         outputVal = 0;
 570         temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
 571         if (temp > 0)
 572                 temp = -temp;
 573
 574         SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
 575         if (currentTiming->hblank_end >= 20)
 576                 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
 577                               currentTiming->hblank_end - 20);
 578         else
 579                 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
 580                               currentTiming->htotal - (20 -
 581                                                        currentTiming->
 582                                                        hblank_end));
 583         DBE_SETREG(did_start_xy, outputVal);
 584
 585         outputVal = 0;
 586         SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
 587                       (u32) (temp + 1));
 588         if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
 589                 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
 590                               currentTiming->hblank_end - DBE_CRS_MAGIC);
 591         else
 592                 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
 593                               currentTiming->htotal - (DBE_CRS_MAGIC -
 594                                                        currentTiming->
 595                                                        hblank_end));
 596         DBE_SETREG(crs_start_xy, outputVal);
 597
 598         outputVal = 0;
 599         SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
 600         SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
 601                       currentTiming->hblank_end - 4);
 602         DBE_SETREG(vc_start_xy, outputVal);
 603
 604         DBE_SETREG(frm_size_tile, frmWrite1);
 605         DBE_SETREG(frm_size_pixel, frmWrite2);
 606
 607         outputVal = 0;
 608         SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
 609         SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
 610         SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
 611         SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
 612         DBE_SETREG(dotclock, outputVal);
 613
 614         udelay(11 * 1000);
 615
 616         DBE_SETREG(vt_vpixen, 0xffffff);
 617         DBE_SETREG(vt_hpixen, 0xffffff);
 618
 619         outputVal = 0;
 620         SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
 621         SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
 622         DBE_SETREG(vt_xymax, outputVal);
 623
 624         outputVal = frmWrite1;
 625         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
 626         DBE_SETREG(frm_size_tile, outputVal);
 627         DBE_SETREG(frm_size_tile, frmWrite1);
 628
 629         outputVal = 0;
 630         SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
 631         DBE_SETREG(ovr_width_tile, outputVal);
 632         DBE_SETREG(ovr_width_tile, 0);
 633
 634         DBE_SETREG(frm_control, frmWrite3b);
 635         DBE_SETREG(did_control, 0);
 636
 637         // Wait for dbe to take frame settings
 638         for (i = 0; i < 100000; i++) {
 639                 DBE_GETREG(frm_inhwctrl, readVal);
 640                 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
 641                     0)
 642                         break;
 643                 else
 644                         udelay(1);
 645         }
 646
 647         if (i == 100000)
 648                 printk(KERN_INFO
 649                        "sgivwfb: timeout waiting for frame DMA enable.\n");
 650
 651         outputVal = 0;
 652         htmp = currentTiming->hblank_end - 19;
 653         if (htmp < 0)
 654                 htmp += currentTiming->htotal;  /* allow blank to wrap around */
 655         SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
 656         SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
 657                       ((htmp + currentTiming->width -
 658                         2) % currentTiming->htotal));
 659         DBE_SETREG(vt_hpixen, outputVal);
 660
 661         outputVal = 0;
 662         SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
 663                       currentTiming->vblank_start);
 664         SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
 665                       currentTiming->vblank_end);
 666         DBE_SETREG(vt_vpixen, outputVal);
 667
 668         // Turn off mouse cursor
 669         par->regs->crs_ctl = 0;
 670
 671         // XXX What's this section for??
 672         DBE_GETREG(ctrlstat, readVal);
 673         readVal &= 0x02000000;
 674
 675         if (readVal != 0) {
 676                 DBE_SETREG(ctrlstat, 0x30000000);
 677         }
 678         return 0;
 679 }
 680
 681 /*
 682  *  Set a single color register. The values supplied are already
 683  *  rounded down to the hardware's capabilities (according to the
 684  *  entries in the var structure). Return != 0 for invalid regno.
 685  */
 686
 687 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
 688                              u_int blue, u_int transp,
 689                              struct fb_info *info)
 690 {
 691         struct sgivw_par *par = (struct sgivw_par *) info->par;
 692
 693         if (regno > 255)
 694                 return 1;
 695         red >>= 8;
 696         green >>= 8;
 697         blue >>= 8;
 698
 699         /* wait for the color map FIFO to have a free entry */
 700         while (par->cmap_fifo == 0)
 701                 par->cmap_fifo = par->regs->cm_fifo;
 702
 703         par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
 704         par->cmap_fifo--;       /* assume FIFO is filling up */
 705         return 0;
 706 }
 707
 708 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
 709                         struct vm_area_struct *vma)
 710 {
 711         unsigned long size = vma->vm_end - vma->vm_start;
 712         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 713
 714         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 715                 return -EINVAL;
 716         if (offset + size > sgivwfb_mem_size)
 717                 return -EINVAL;
 718         offset += sgivwfb_mem_phys;
 719         pgprot_val(vma->vm_page_prot) =
 720             pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
 721         vma->vm_flags |= VM_IO;
 722         if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
 723                                                 size, vma->vm_page_prot))
 724                 return -EAGAIN;
 725         vma->vm_file = file;
 726         printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
 727                offset, vma->vm_start);
 728         return 0;
 729 }
 730
 731 int __init sgivwfb_setup(char *options)
 732 {
 733         char *this_opt;
 734
 735         if (!options || !*options)
 736                 return 0;
 737
 738         while ((this_opt = strsep(&options, ",")) != NULL) {
 739                 if (!strncmp(this_opt, "monitor:", 8)) {
 740                         if (!strncmp(this_opt + 8, "crt", 3))
 741                                 flatpanel_id = -1;
 742                         else if (!strncmp(this_opt + 8, "1600sw", 6))
 743                                 flatpanel_id = FLATPANEL_SGI_1600SW;
 744                 }
 745         }
 746         return 0;
 747 }
 748
 749 /*
 750  *  Initialisation
 751  */
 752 static void sgivwfb_release(struct device *device)
 753 {
 754 }
 755
 756 static int __init sgivwfb_probe(struct device *device)
 757 {
 758         struct platform_device *dev = to_platform_device(device);
 759         struct sgivw_par *par;
 760         struct fb_info *info;
 761         char *monitor;
 762
 763         info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &dev->dev);
 764         if (!info)
 765                 return -ENOMEM;
 766         par = info->par;
 767
 768         if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
 769                 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
 770                 framebuffer_release(info);
 771                 return -EBUSY;
 772         }
 773
 774         par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
 775         if (!par->regs) {
 776                 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
 777                 goto fail_ioremap_regs;
 778         }
 779
 780         mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
 781
 782         sgivwfb_fix.smem_start = sgivwfb_mem_phys;
 783         sgivwfb_fix.smem_len = sgivwfb_mem_size;
 784         sgivwfb_fix.ywrapstep = ywrap;
 785         sgivwfb_fix.ypanstep = ypan;
 786
 787         info->fix = sgivwfb_fix;
 788
 789         switch (flatpanel_id) {
 790                 case FLATPANEL_SGI_1600SW:
 791                         info->var = sgivwfb_var1600sw;
 792                         monitor = "SGI 1600SW flatpanel";
 793                         break;
 794                 default:
 795                         info->var = sgivwfb_var;
 796                         monitor = "CRT";
 797         }
 798
 799         printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
 800
 801         info->fbops = &sgivwfb_ops;
 802         info->pseudo_palette = (void *) (par + 1);
 803         info->flags = FBINFO_DEFAULT;
 804
 805         info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
 806         if (!info->screen_base) {
 807                 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
 808                 goto fail_ioremap_fbmem;
 809         }
 810
 811         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
 812                 goto fail_color_map;
 813
 814         if (register_framebuffer(info) < 0) {
 815                 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
 816                 goto fail_register_framebuffer;
 817         }
 818
 819         dev_set_drvdata(&dev->dev, info);
 820
 821         printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
 822                 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
 823         return 0;
 824
 825 fail_register_framebuffer:
 826         fb_dealloc_cmap(&info->cmap);
 827 fail_color_map:
 828         iounmap((char *) info->screen_base);
 829 fail_ioremap_fbmem:
 830         iounmap(par->regs);
 831 fail_ioremap_regs:
 832         release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
 833         framebuffer_release(info);
 834         return -ENXIO;
 835 }
 836
 837 static int sgivwfb_remove(struct device *device)
 838 {
 839         struct fb_info *info = dev_get_drvdata(device);
 840
 841         if (info) {
 842                 struct sgivw_par *par = info->par;
 843
 844                 unregister_framebuffer(info);
 845                 dbe_TurnOffDma(par);
 846                 iounmap(par->regs);
 847                 iounmap(info->screen_base);
 848                 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
 849         }
 850         return 0;
 851 }
 852
 853 static struct device_driver sgivwfb_driver = {
 854         .name   = "sgivwfb",
 855         .bus    = &platform_bus_type,
 856         .probe  = sgivwfb_probe,
 857         .remove = sgivwfb_remove,
 858 };
 859
 860 static struct platform_device sgivwfb_device = {
 861         .name   = "sgivwfb",
 862         .id     = 0,
 863         .dev    = {
 864                 .release = sgivwfb_release,
 865         }
 866 };
 867
 868 int __init sgivwfb_init(void)
 869 {
 870         int ret;
 871
 872 #ifndef MODULE
 873         char *option = NULL;
 874
 875         if (fb_get_options("sgivwfb", &option))
 876                 return -ENODEV;
 877         sgivwfb_setup(option);
 878 #endif
 879         ret = driver_register(&sgivwfb_driver);
 880         if (!ret) {
 881                 ret = platform_device_register(&sgivwfb_device);
 882                 if (ret)
 883                         driver_unregister(&sgivwfb_driver);
 884         }
 885         return ret;
 886 }
 887
 888 module_init(sgivwfb_init);
 889
 890 #ifdef MODULE
 891 MODULE_LICENSE("GPL");
 892
 893 static void __exit sgivwfb_exit(void)
 894 {
 895         platform_device_unregister(&sgivwfb_device);
 896         driver_unregister(&sgivwfb_driver);
 897 }
 898
 899 module_exit(sgivwfb_exit);
 900
 901 #endif                          /* MODULE */