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 <linux/platform_device.h>
  22
  23 #include <asm/io.h>
  24 #include <asm/mtrr.h>
  25
  26 #define INCLUDE_TIMING_TABLE_DATA
  27 #define DBE_REG_BASE par->regs
  28 #include <video/sgivw.h>
  29
  30 struct sgivw_par {
  31         struct asregs *regs;
  32         u32 cmap_fifo;
  33         u_long timing_num;
  34 };
  35
  36 #define FLATPANEL_SGI_1600SW    5
  37
  38 /*
  39  *  RAM we reserve for the frame buffer. This defines the maximum screen
  40  *  size
  41  *
  42  *  The default can be overridden if the driver is compiled as a module
  43  */
  44
  45 /* set by arch/i386/kernel/setup.c */
  46 extern unsigned long sgivwfb_mem_phys;
  47 extern unsigned long sgivwfb_mem_size;
  48
  49 static int ypan = 0;
  50 static int ywrap = 0;
  51
  52 static int flatpanel_id = -1;
  53
  54 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
  55         .id             = "SGI Vis WS FB",
  56         .type           = FB_TYPE_PACKED_PIXELS,
  57         .visual         = FB_VISUAL_PSEUDOCOLOR,
  58         .mmio_start     = DBE_REG_PHYS,
  59         .mmio_len       = DBE_REG_SIZE,
  60         .accel          = FB_ACCEL_NONE,
  61         .line_length    = 640,
  62 };
  63
  64 static struct fb_var_screeninfo sgivwfb_var __initdata = {
  65         /* 640x480, 8 bpp */
  66         .xres           = 640,
  67         .yres           = 480,
  68         .xres_virtual   = 640,
  69         .yres_virtual   = 480,
  70         .bits_per_pixel = 8,
  71         .red            = { 0, 8, 0 },
  72         .green          = { 0, 8, 0 },
  73         .blue           = { 0, 8, 0 },
  74         .height         = -1,
  75         .width          = -1,
  76         .pixclock       = 20000,
  77         .left_margin    = 64,
  78         .right_margin   = 64,
  79         .upper_margin   = 32,
  80         .lower_margin   = 32,
  81         .hsync_len      = 64,
  82         .vsync_len      = 2,
  83         .vmode          = FB_VMODE_NONINTERLACED
  84 };
  85
  86 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
  87         /* 1600x1024, 8 bpp */
  88         .xres           = 1600,
  89         .yres           = 1024,
  90         .xres_virtual   = 1600,
  91         .yres_virtual   = 1024,
  92         .bits_per_pixel = 8,
  93         .red            = { 0, 8, 0 },
  94         .green          = { 0, 8, 0 },
  95         .blue           = { 0, 8, 0 },
  96         .height         = -1,
  97         .width          = -1,
  98         .pixclock       = 9353,
  99         .left_margin    = 20,
 100         .right_margin   = 30,
 101         .upper_margin   = 37,
 102         .lower_margin   = 3,
 103         .hsync_len      = 20,
 104         .vsync_len      = 3,
 105         .vmode          = FB_VMODE_NONINTERLACED
 106 };
 107
 108 /*
 109  *  Interface used by the world
 110  */
 111 int sgivwfb_init(void);
 112
 113 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
 114 static int sgivwfb_set_par(struct fb_info *info);
 115 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
 116                              u_int blue, u_int transp,
 117                              struct fb_info *info);
 118 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
 119                         struct vm_area_struct *vma);
 120
 121 static struct fb_ops sgivwfb_ops = {
 122         .owner          = THIS_MODULE,
 123         .fb_check_var   = sgivwfb_check_var,
 124         .fb_set_par     = sgivwfb_set_par,
 125         .fb_setcolreg   = sgivwfb_setcolreg,
 126         .fb_fillrect    = cfb_fillrect,
 127         .fb_copyarea    = cfb_copyarea,
 128         .fb_imageblit   = cfb_imageblit,
 129         .fb_cursor      = soft_cursor,
 130         .fb_mmap        = sgivwfb_mmap,
 131 };
 132
 133 /*
 134  *  Internal routines
 135  */
 136 static unsigned long bytes_per_pixel(int bpp)
 137 {
 138         switch (bpp) {
 139                 case 8:
 140                         return 1;
 141                 case 16:
 142                         return 2;
 143                 case 32:
 144                         return 4;
 145                 default:
 146                         printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
 147                         return 0;
 148         }
 149 }
 150
 151 static unsigned long get_line_length(int xres_virtual, int bpp)
 152 {
 153         return (xres_virtual * bytes_per_pixel(bpp));
 154 }
 155
 156 /*
 157  * Function:    dbe_TurnOffDma
 158  * Parameters:  (None)
 159  * Description: This should turn off the monitor and dbe.  This is used
 160  *              when switching between the serial console and the graphics
 161  *              console.
 162  */
 163
 164 static void dbe_TurnOffDma(struct sgivw_par *par)
 165 {
 166         unsigned int readVal;
 167         int i;
 168
 169         // Check to see if things are already turned off:
 170         // 1) Check to see if dbe is not using the internal dotclock.
 171         // 2) Check to see if the xy counter in dbe is already off.
 172
 173         DBE_GETREG(ctrlstat, readVal);
 174         if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
 175                 return;
 176
 177         DBE_GETREG(vt_xy, readVal);
 178         if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
 179                 return;
 180
 181         // Otherwise, turn off dbe
 182
 183         DBE_GETREG(ovr_control, readVal);
 184         SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
 185         DBE_SETREG(ovr_control, readVal);
 186         udelay(1000);
 187         DBE_GETREG(frm_control, readVal);
 188         SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
 189         DBE_SETREG(frm_control, readVal);
 190         udelay(1000);
 191         DBE_GETREG(did_control, readVal);
 192         SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
 193         DBE_SETREG(did_control, readVal);
 194         udelay(1000);
 195
 196         // XXX HACK:
 197         //
 198         //    This was necessary for GBE--we had to wait through two
 199         //    vertical retrace periods before the pixel DMA was
 200         //    turned off for sure.  I've left this in for now, in
 201         //    case dbe needs it.
 202
 203         for (i = 0; i < 10000; i++) {
 204                 DBE_GETREG(frm_inhwctrl, readVal);
 205                 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
 206                     0)
 207                         udelay(10);
 208                 else {
 209                         DBE_GETREG(ovr_inhwctrl, readVal);
 210                         if (GET_DBE_FIELD
 211                             (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
 212                                 udelay(10);
 213                         else {
 214                                 DBE_GETREG(did_inhwctrl, readVal);
 215                                 if (GET_DBE_FIELD
 216                                     (DID_INHWCTRL, DID_DMA_ENABLE,
 217                                      readVal) == 0)
 218                                         udelay(10);
 219                                 else
 220                                         break;
 221                         }
 222                 }
 223         }
 224 }
 225
 226 /*
 227  *  Set the User Defined Part of the Display. Again if par use it to get
 228  *  real video mode.
 229  */
 230 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
 231                              struct fb_info *info)
 232 {
 233         struct sgivw_par *par = (struct sgivw_par *)info->par;
 234         struct dbe_timing_info *timing;
 235         u_long line_length;
 236         u_long min_mode;
 237         int req_dot;
 238         int test_mode;
 239
 240         /*
 241          *  FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
 242          *  as FB_VMODE_SMOOTH_XPAN is only used internally
 243          */
 244
 245         if (var->vmode & FB_VMODE_CONUPDATE) {
 246                 var->vmode |= FB_VMODE_YWRAP;
 247                 var->xoffset = info->var.xoffset;
 248                 var->yoffset = info->var.yoffset;
 249         }
 250
 251         /* XXX FIXME - forcing var's */
 252         var->xoffset = 0;
 253         var->yoffset = 0;
 254
 255         /* Limit bpp to 8, 16, and 32 */
 256         if (var->bits_per_pixel <= 8)
 257                 var->bits_per_pixel = 8;
 258         else if (var->bits_per_pixel <= 16)
 259                 var->bits_per_pixel = 16;
 260         else if (var->bits_per_pixel <= 32)
 261                 var->bits_per_pixel = 32;
 262         else
 263                 return -EINVAL;
 264
 265         var->grayscale = 0;     /* No grayscale for now */
 266
 267         /* determine valid resolution and timing */
 268         for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
 269                 if (dbeVTimings[min_mode].width >= var->xres &&
 270                     dbeVTimings[min_mode].height >= var->yres)
 271                         break;
 272         }
 273
 274         if (min_mode == DBE_VT_SIZE)
 275                 return -EINVAL; /* Resolution to high */
 276
 277         /* XXX FIXME - should try to pick best refresh rate */
 278         /* for now, pick closest dot-clock within 3MHz */
 279         req_dot = PICOS2KHZ(var->pixclock);
 280         printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
 281                var->pixclock, req_dot);
 282         test_mode = min_mode;
 283         while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
 284                 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
 285                         break;
 286                 test_mode++;
 287         }
 288         if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
 289                 test_mode--;
 290         min_mode = test_mode;
 291         timing = &dbeVTimings[min_mode];
 292         printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
 293
 294         /* Adjust virtual resolution, if necessary */
 295         if (var->xres > var->xres_virtual || (!ywrap && !ypan))
 296                 var->xres_virtual = var->xres;
 297         if (var->yres > var->yres_virtual || (!ywrap && !ypan))
 298                 var->yres_virtual = var->yres;
 299
 300         /*
 301          *  Memory limit
 302          */
 303         line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
 304         if (line_length * var->yres_virtual > sgivwfb_mem_size)
 305                 return -ENOMEM; /* Virtual resolution to high */
 306
 307         info->fix.line_length = line_length;
 308
 309         switch (var->bits_per_pixel) {
 310         case 8:
 311                 var->red.offset = 0;
 312                 var->red.length = 8;
 313                 var->green.offset = 0;
 314                 var->green.length = 8;
 315                 var->blue.offset = 0;
 316                 var->blue.length = 8;
 317                 var->transp.offset = 0;
 318                 var->transp.length = 0;
 319                 break;
 320         case 16:                /* RGBA 5551 */
 321                 var->red.offset = 11;
 322                 var->red.length = 5;
 323                 var->green.offset = 6;
 324                 var->green.length = 5;
 325                 var->blue.offset = 1;
 326                 var->blue.length = 5;
 327                 var->transp.offset = 0;
 328                 var->transp.length = 0;
 329                 break;
 330         case 32:                /* RGB 8888 */
 331                 var->red.offset = 0;
 332                 var->red.length = 8;
 333                 var->green.offset = 8;
 334                 var->green.length = 8;
 335                 var->blue.offset = 16;
 336                 var->blue.length = 8;
 337                 var->transp.offset = 24;
 338                 var->transp.length = 8;
 339                 break;
 340         }
 341         var->red.msb_right = 0;
 342         var->green.msb_right = 0;
 343         var->blue.msb_right = 0;
 344         var->transp.msb_right = 0;
 345
 346         /* set video timing information */
 347         var->pixclock = KHZ2PICOS(timing->cfreq);
 348         var->left_margin = timing->htotal - timing->hsync_end;
 349         var->right_margin = timing->hsync_start - timing->width;
 350         var->upper_margin = timing->vtotal - timing->vsync_end;
 351         var->lower_margin = timing->vsync_start - timing->height;
 352         var->hsync_len = timing->hsync_end - timing->hsync_start;
 353         var->vsync_len = timing->vsync_end - timing->vsync_start;
 354
 355         /* Ouch. This breaks the rules but timing_num is only important if you
 356         * change a video mode */
 357         par->timing_num = min_mode;
 358
 359         printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
 360                 var->xres, var->yres, var->bits_per_pixel);
 361         printk(KERN_INFO "         vxres=%d vyres=%d\n", var->xres_virtual,
 362                 var->yres_virtual);
 363         return 0;
 364 }
 365
 366 /*
 367  *  Setup flatpanel related registers.
 368  */
 369 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
 370 {
 371         int fp_wid, fp_hgt, fp_vbs, fp_vbe;
 372         u32 outputVal = 0;
 373
 374         SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
 375                 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
 376         SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
 377                 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
 378         DBE_SETREG(vt_flags, outputVal);
 379
 380         /* Turn on the flat panel */
 381         switch (flatpanel_id) {
 382                 case FLATPANEL_SGI_1600SW:
 383                         fp_wid = 1600;
 384                         fp_hgt = 1024;
 385                         fp_vbs = 0;
 386                         fp_vbe = 1600;
 387                         currentTiming->pll_m = 4;
 388                         currentTiming->pll_n = 1;
 389                         currentTiming->pll_p = 0;
 390                         break;
 391                 default:
 392                         fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
 393         }
 394
 395         outputVal = 0;
 396         SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
 397         SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
 398         DBE_SETREG(fp_de, outputVal);
 399         outputVal = 0;
 400         SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
 401         DBE_SETREG(fp_hdrv, outputVal);
 402         outputVal = 0;
 403         SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
 404         SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
 405         DBE_SETREG(fp_vdrv, outputVal);
 406 }
 407
 408 /*
 409  *  Set the hardware according to 'par'.
 410  */
 411 static int sgivwfb_set_par(struct fb_info *info)
 412 {
 413         struct sgivw_par *par = info->par;
 414         int i, j, htmp, temp;
 415         u32 readVal, outputVal;
 416         int wholeTilesX, maxPixelsPerTileX;
 417         int frmWrite1, frmWrite2, frmWrite3b;
 418         struct dbe_timing_info *currentTiming; /* Current Video Timing */
 419         int xpmax, ypmax;       // Monitor resolution
 420         int bytesPerPixel;      // Bytes per pixel
 421
 422         currentTiming = &dbeVTimings[par->timing_num];
 423         bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
 424         xpmax = currentTiming->width;
 425         ypmax = currentTiming->height;
 426
 427         /* dbe_InitGraphicsBase(); */
 428         /* Turn on dotclock PLL */
 429         DBE_SETREG(ctrlstat, 0x20000000);
 430
 431         dbe_TurnOffDma(par);
 432
 433         /* dbe_CalculateScreenParams(); */
 434         maxPixelsPerTileX = 512 / bytesPerPixel;
 435         wholeTilesX = xpmax / maxPixelsPerTileX;
 436         if (wholeTilesX * maxPixelsPerTileX < xpmax)
 437                 wholeTilesX++;
 438
 439         printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
 440                maxPixelsPerTileX, wholeTilesX);
 441
 442         /* dbe_InitGammaMap(); */
 443         udelay(10);
 444
 445         for (i = 0; i < 256; i++) {
 446                 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
 447         }
 448
 449         /* dbe_TurnOn(); */
 450         DBE_GETREG(vt_xy, readVal);
 451         if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
 452                 DBE_SETREG(vt_xy, 0x00000000);
 453                 udelay(1);
 454         } else
 455                 dbe_TurnOffDma(par);
 456
 457         /* dbe_Initdbe(); */
 458         for (i = 0; i < 256; i++) {
 459                 for (j = 0; j < 100; j++) {
 460                         DBE_GETREG(cm_fifo, readVal);
 461                         if (readVal != 0x00000000)
 462                                 break;
 463                         else
 464                                 udelay(10);
 465                 }
 466
 467                 // DBE_ISETREG(cmap, i, 0x00000000);
 468                 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
 469         }
 470
 471         /* dbe_InitFramebuffer(); */
 472         frmWrite1 = 0;
 473         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
 474                       wholeTilesX);
 475         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
 476
 477         switch (bytesPerPixel) {
 478         case 1:
 479                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 480                               DBE_FRM_DEPTH_8);
 481                 break;
 482         case 2:
 483                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 484                               DBE_FRM_DEPTH_16);
 485                 break;
 486         case 4:
 487                 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
 488                               DBE_FRM_DEPTH_32);
 489                 break;
 490         }
 491
 492         frmWrite2 = 0;
 493         SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
 494
 495         // Tell dbe about the framebuffer location and type
 496         // XXX What format is the FRM_TILE_PTR??  64K aligned address?
 497         frmWrite3b = 0;
 498         SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
 499                       sgivwfb_mem_phys >> 9);
 500         SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
 501         SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
 502
 503         /* Initialize DIDs */
 504
 505         outputVal = 0;
 506         switch (bytesPerPixel) {
 507         case 1:
 508                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
 509                 break;
 510         case 2:
 511                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
 512                 break;
 513         case 4:
 514                 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
 515                 break;
 516         }
 517         SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
 518
 519         for (i = 0; i < 32; i++) {
 520                 DBE_ISETREG(mode_regs, i, outputVal);
 521         }
 522
 523         /* dbe_InitTiming(); */
 524         DBE_SETREG(vt_intr01, 0xffffffff);
 525         DBE_SETREG(vt_intr23, 0xffffffff);
 526
 527         DBE_GETREG(dotclock, readVal);
 528         DBE_SETREG(dotclock, readVal & 0xffff);
 529
 530         DBE_SETREG(vt_xymax, 0x00000000);
 531         outputVal = 0;
 532         SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
 533                       currentTiming->vsync_start);
 534         SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
 535                       currentTiming->vsync_end);
 536         DBE_SETREG(vt_vsync, outputVal);
 537         outputVal = 0;
 538         SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
 539                       currentTiming->hsync_start);
 540         SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
 541                       currentTiming->hsync_end);
 542         DBE_SETREG(vt_hsync, outputVal);
 543         outputVal = 0;
 544         SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
 545                       currentTiming->vblank_start);
 546         SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
 547                       currentTiming->vblank_end);
 548         DBE_SETREG(vt_vblank, outputVal);
 549         outputVal = 0;
 550         SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
 551                       currentTiming->hblank_start);
 552         SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
 553                       currentTiming->hblank_end - 3);
 554         DBE_SETREG(vt_hblank, outputVal);
 555         outputVal = 0;
 556         SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
 557                       currentTiming->vblank_start);
 558         SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
 559                       currentTiming->vblank_end);
 560         DBE_SETREG(vt_vcmap, outputVal);
 561         outputVal = 0;
 562         SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
 563                       currentTiming->hblank_start);
 564         SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
 565                       currentTiming->hblank_end - 3);
 566         DBE_SETREG(vt_hcmap, outputVal);
 567
 568         if (flatpanel_id != -1)
 569                 sgivwfb_setup_flatpanel(par, currentTiming);
 570
 571         outputVal = 0;
 572         temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
 573         if (temp > 0)
 574                 temp = -temp;
 575
 576         SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
 577         if (currentTiming->hblank_end >= 20)
 578                 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
 579                               currentTiming->hblank_end - 20);
 580         else
 581                 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
 582                               currentTiming->htotal - (20 -
 583                                                        currentTiming->
 584                                                        hblank_end));
 585         DBE_SETREG(did_start_xy, outputVal);
 586
 587         outputVal = 0;
 588         SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
 589                       (u32) (temp + 1));
 590         if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
 591                 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
 592                               currentTiming->hblank_end - DBE_CRS_MAGIC);
 593         else
 594                 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
 595                               currentTiming->htotal - (DBE_CRS_MAGIC -
 596                                                        currentTiming->
 597                                                        hblank_end));
 598         DBE_SETREG(crs_start_xy, outputVal);
 599
 600         outputVal = 0;
 601         SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
 602         SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
 603                       currentTiming->hblank_end - 4);
 604         DBE_SETREG(vc_start_xy, outputVal);
 605
 606         DBE_SETREG(frm_size_tile, frmWrite1);
 607         DBE_SETREG(frm_size_pixel, frmWrite2);
 608
 609         outputVal = 0;
 610         SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
 611         SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
 612         SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
 613         SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
 614         DBE_SETREG(dotclock, outputVal);
 615
 616         udelay(11 * 1000);
 617
 618         DBE_SETREG(vt_vpixen, 0xffffff);
 619         DBE_SETREG(vt_hpixen, 0xffffff);
 620
 621         outputVal = 0;
 622         SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
 623         SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
 624         DBE_SETREG(vt_xymax, outputVal);
 625
 626         outputVal = frmWrite1;
 627         SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
 628         DBE_SETREG(frm_size_tile, outputVal);
 629         DBE_SETREG(frm_size_tile, frmWrite1);
 630
 631         outputVal = 0;
 632         SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
 633         DBE_SETREG(ovr_width_tile, outputVal);
 634         DBE_SETREG(ovr_width_tile, 0);
 635
 636         DBE_SETREG(frm_control, frmWrite3b);
 637         DBE_SETREG(did_control, 0);
 638
 639         // Wait for dbe to take frame settings
 640         for (i = 0; i < 100000; i++) {
 641                 DBE_GETREG(frm_inhwctrl, readVal);
 642                 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
 643                     0)
 644                         break;
 645                 else
 646                         udelay(1);
 647         }
 648
 649         if (i == 100000)
 650                 printk(KERN_INFO
 651                        "sgivwfb: timeout waiting for frame DMA enable.\n");
 652
 653         outputVal = 0;
 654         htmp = currentTiming->hblank_end - 19;
 655         if (htmp < 0)
 656                 htmp += currentTiming->htotal;  /* allow blank to wrap around */
 657         SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
 658         SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
 659                       ((htmp + currentTiming->width -
 660                         2) % currentTiming->htotal));
 661         DBE_SETREG(vt_hpixen, outputVal);
 662
 663         outputVal = 0;
 664         SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
 665                       currentTiming->vblank_start);
 666         SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
 667                       currentTiming->vblank_end);
 668         DBE_SETREG(vt_vpixen, outputVal);
 669
 670         // Turn off mouse cursor
 671         par->regs->crs_ctl = 0;
 672
 673         // XXX What's this section for??
 674         DBE_GETREG(ctrlstat, readVal);
 675         readVal &= 0x02000000;
 676
 677         if (readVal != 0) {
 678                 DBE_SETREG(ctrlstat, 0x30000000);
 679         }
 680         return 0;
 681 }
 682
 683 /*
 684  *  Set a single color register. The values supplied are already
 685  *  rounded down to the hardware's capabilities (according to the
 686  *  entries in the var structure). Return != 0 for invalid regno.
 687  */
 688
 689 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
 690                              u_int blue, u_int transp,
 691                              struct fb_info *info)
 692 {
 693         struct sgivw_par *par = (struct sgivw_par *) info->par;
 694
 695         if (regno > 255)
 696                 return 1;
 697         red >>= 8;
 698         green >>= 8;
 699         blue >>= 8;
 700
 701         /* wait for the color map FIFO to have a free entry */
 702         while (par->cmap_fifo == 0)
 703                 par->cmap_fifo = par->regs->cm_fifo;
 704
 705         par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
 706         par->cmap_fifo--;       /* assume FIFO is filling up */
 707         return 0;
 708 }
 709
 710 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
 711                         struct vm_area_struct *vma)
 712 {
 713         unsigned long size = vma->vm_end - vma->vm_start;
 714         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 715
 716         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 717                 return -EINVAL;
 718         if (offset + size > sgivwfb_mem_size)
 719                 return -EINVAL;
 720         offset += sgivwfb_mem_phys;
 721         pgprot_val(vma->vm_page_prot) =
 722             pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
 723         vma->vm_flags |= VM_IO;
 724         if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
 725                                                 size, vma->vm_page_prot))
 726                 return -EAGAIN;
 727         vma->vm_file = file;
 728         printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
 729                offset, vma->vm_start);
 730         return 0;
 731 }
 732
 733 int __init sgivwfb_setup(char *options)
 734 {
 735         char *this_opt;
 736
 737         if (!options || !*options)
 738                 return 0;
 739
 740         while ((this_opt = strsep(&options, ",")) != NULL) {
 741                 if (!strncmp(this_opt, "monitor:", 8)) {
 742                         if (!strncmp(this_opt + 8, "crt", 3))
 743                                 flatpanel_id = -1;
 744                         else if (!strncmp(this_opt + 8, "1600sw", 6))
 745                                 flatpanel_id = FLATPANEL_SGI_1600SW;
 746                 }
 747         }
 748         return 0;
 749 }
 750
 751 /*
 752  *  Initialisation
 753  */
 754 static void sgivwfb_release(struct device *device)
 755 {
 756 }
 757
 758 static int __init sgivwfb_probe(struct device *device)
 759 {
 760         struct platform_device *dev = to_platform_device(device);
 761         struct sgivw_par *par;
 762         struct fb_info *info;
 763         char *monitor;
 764
 765         info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &dev->dev);
 766         if (!info)
 767                 return -ENOMEM;
 768         par = info->par;
 769
 770         if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
 771                 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
 772                 framebuffer_release(info);
 773                 return -EBUSY;
 774         }
 775
 776         par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
 777         if (!par->regs) {
 778                 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
 779                 goto fail_ioremap_regs;
 780         }
 781
 782         mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
 783
 784         sgivwfb_fix.smem_start = sgivwfb_mem_phys;
 785         sgivwfb_fix.smem_len = sgivwfb_mem_size;
 786         sgivwfb_fix.ywrapstep = ywrap;
 787         sgivwfb_fix.ypanstep = ypan;
 788
 789         info->fix = sgivwfb_fix;
 790
 791         switch (flatpanel_id) {
 792                 case FLATPANEL_SGI_1600SW:
 793                         info->var = sgivwfb_var1600sw;
 794                         monitor = "SGI 1600SW flatpanel";
 795                         break;
 796                 default:
 797                         info->var = sgivwfb_var;
 798                         monitor = "CRT";
 799         }
 800
 801         printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
 802
 803         info->fbops = &sgivwfb_ops;
 804         info->pseudo_palette = (void *) (par + 1);
 805         info->flags = FBINFO_DEFAULT;
 806
 807         info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
 808         if (!info->screen_base) {
 809                 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
 810                 goto fail_ioremap_fbmem;
 811         }
 812
 813         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
 814                 goto fail_color_map;
 815
 816         if (register_framebuffer(info) < 0) {
 817                 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
 818                 goto fail_register_framebuffer;
 819         }
 820
 821         dev_set_drvdata(&dev->dev, info);
 822
 823         printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
 824                 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
 825         return 0;
 826
 827 fail_register_framebuffer:
 828         fb_dealloc_cmap(&info->cmap);
 829 fail_color_map:
 830         iounmap((char *) info->screen_base);
 831 fail_ioremap_fbmem:
 832         iounmap(par->regs);
 833 fail_ioremap_regs:
 834         release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
 835         framebuffer_release(info);
 836         return -ENXIO;
 837 }
 838
 839 static int sgivwfb_remove(struct device *device)
 840 {
 841         struct fb_info *info = dev_get_drvdata(device);
 842
 843         if (info) {
 844                 struct sgivw_par *par = info->par;
 845
 846                 unregister_framebuffer(info);
 847                 dbe_TurnOffDma(par);
 848                 iounmap(par->regs);
 849                 iounmap(info->screen_base);
 850                 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
 851         }
 852         return 0;
 853 }
 854
 855 static struct device_driver sgivwfb_driver = {
 856         .name   = "sgivwfb",
 857         .bus    = &platform_bus_type,
 858         .probe  = sgivwfb_probe,
 859         .remove = sgivwfb_remove,
 860 };
 861
 862 static struct platform_device sgivwfb_device = {
 863         .name   = "sgivwfb",
 864         .id     = 0,
 865         .dev    = {
 866                 .release = sgivwfb_release,
 867         }
 868 };
 869
 870 int __init sgivwfb_init(void)
 871 {
 872         int ret;
 873
 874 #ifndef MODULE
 875         char *option = NULL;
 876
 877         if (fb_get_options("sgivwfb", &option))
 878                 return -ENODEV;
 879         sgivwfb_setup(option);
 880 #endif
 881         ret = driver_register(&sgivwfb_driver);
 882         if (!ret) {
 883                 ret = platform_device_register(&sgivwfb_device);
 884                 if (ret)
 885                         driver_unregister(&sgivwfb_driver);
 886         }
 887         return ret;
 888 }
 889
 890 module_init(sgivwfb_init);
 891
 892 #ifdef MODULE
 893 MODULE_LICENSE("GPL");
 894
 895 static void __exit sgivwfb_exit(void)
 896 {
 897         platform_device_unregister(&sgivwfb_device);
 898         driver_unregister(&sgivwfb_driver);
 899 }
 900
 901 module_exit(sgivwfb_exit);
 902
 903 #endif                          /* MODULE */