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   1 /* cg6.c: CGSIX (GX, GXplus, TGX) frame buffer driver
   2  *
   3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
   5  * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
   6  * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
   7  *
   8  * Driver layout based loosely on tgafb.c, see that file for credits.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/string.h>
  15 #include <linux/slab.h>
  16 #include <linux/delay.h>
  17 #include <linux/init.h>
  18 #include <linux/fb.h>
  19 #include <linux/mm.h>
  20
  21 #include <asm/io.h>
  22 #include <asm/prom.h>
  23 #include <asm/of_device.h>
  24 #include <asm/fbio.h>
  25
  26 #include "sbuslib.h"
  27
  28 /*
  29  * Local functions.
  30  */
  31
  32 static int cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
  33                          unsigned, struct fb_info *);
  34 static int cg6_blank(int, struct fb_info *);
  35
  36 static void cg6_imageblit(struct fb_info *, const struct fb_image *);
  37 static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
  38 static int cg6_sync(struct fb_info *);
  39 static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
  40 static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
  41
  42 /*
  43  *  Frame buffer operations
  44  */
  45
  46 static struct fb_ops cg6_ops = {
  47         .owner                  = THIS_MODULE,
  48         .fb_setcolreg           = cg6_setcolreg,
  49         .fb_blank               = cg6_blank,
  50         .fb_fillrect            = cg6_fillrect,
  51         .fb_copyarea            = cfb_copyarea,
  52         .fb_imageblit           = cg6_imageblit,
  53         .fb_sync                = cg6_sync,
  54         .fb_mmap                = cg6_mmap,
  55         .fb_ioctl               = cg6_ioctl,
  56 #ifdef CONFIG_COMPAT
  57         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  58 #endif
  59 };
  60
  61 /* Offset of interesting structures in the OBIO space */
  62 /*
  63  * Brooktree is the video dac and is funny to program on the cg6.
  64  * (it's even funnier on the cg3)
  65  * The FBC could be the frame buffer control
  66  * The FHC could is the frame buffer hardware control.
  67  */
  68 #define CG6_ROM_OFFSET       0x0UL
  69 #define CG6_BROOKTREE_OFFSET 0x200000UL
  70 #define CG6_DHC_OFFSET       0x240000UL
  71 #define CG6_ALT_OFFSET       0x280000UL
  72 #define CG6_FHC_OFFSET       0x300000UL
  73 #define CG6_THC_OFFSET       0x301000UL
  74 #define CG6_FBC_OFFSET       0x700000UL
  75 #define CG6_TEC_OFFSET       0x701000UL
  76 #define CG6_RAM_OFFSET       0x800000UL
  77
  78 /* FHC definitions */
  79 #define CG6_FHC_FBID_SHIFT           24
  80 #define CG6_FHC_FBID_MASK            255
  81 #define CG6_FHC_REV_SHIFT            20
  82 #define CG6_FHC_REV_MASK             15
  83 #define CG6_FHC_FROP_DISABLE         (1 << 19)
  84 #define CG6_FHC_ROW_DISABLE          (1 << 18)
  85 #define CG6_FHC_SRC_DISABLE          (1 << 17)
  86 #define CG6_FHC_DST_DISABLE          (1 << 16)
  87 #define CG6_FHC_RESET                (1 << 15)
  88 #define CG6_FHC_LITTLE_ENDIAN        (1 << 13)
  89 #define CG6_FHC_RES_MASK             (3 << 11)
  90 #define CG6_FHC_1024                 (0 << 11)
  91 #define CG6_FHC_1152                 (1 << 11)
  92 #define CG6_FHC_1280                 (2 << 11)
  93 #define CG6_FHC_1600                 (3 << 11)
  94 #define CG6_FHC_CPU_MASK             (3 << 9)
  95 #define CG6_FHC_CPU_SPARC            (0 << 9)
  96 #define CG6_FHC_CPU_68020            (1 << 9)
  97 #define CG6_FHC_CPU_386              (2 << 9)
  98 #define CG6_FHC_TEST                 (1 << 8)
  99 #define CG6_FHC_TEST_X_SHIFT         4
 100 #define CG6_FHC_TEST_X_MASK          15
 101 #define CG6_FHC_TEST_Y_SHIFT         0
 102 #define CG6_FHC_TEST_Y_MASK          15
 103
 104 /* FBC mode definitions */
 105 #define CG6_FBC_BLIT_IGNORE             0x00000000
 106 #define CG6_FBC_BLIT_NOSRC              0x00100000
 107 #define CG6_FBC_BLIT_SRC                0x00200000
 108 #define CG6_FBC_BLIT_ILLEGAL            0x00300000
 109 #define CG6_FBC_BLIT_MASK               0x00300000
 110
 111 #define CG6_FBC_VBLANK                  0x00080000
 112
 113 #define CG6_FBC_MODE_IGNORE             0x00000000
 114 #define CG6_FBC_MODE_COLOR8             0x00020000
 115 #define CG6_FBC_MODE_COLOR1             0x00040000
 116 #define CG6_FBC_MODE_HRMONO             0x00060000
 117 #define CG6_FBC_MODE_MASK               0x00060000
 118
 119 #define CG6_FBC_DRAW_IGNORE             0x00000000
 120 #define CG6_FBC_DRAW_RENDER             0x00008000
 121 #define CG6_FBC_DRAW_PICK               0x00010000
 122 #define CG6_FBC_DRAW_ILLEGAL            0x00018000
 123 #define CG6_FBC_DRAW_MASK               0x00018000
 124
 125 #define CG6_FBC_BWRITE0_IGNORE          0x00000000
 126 #define CG6_FBC_BWRITE0_ENABLE          0x00002000
 127 #define CG6_FBC_BWRITE0_DISABLE         0x00004000
 128 #define CG6_FBC_BWRITE0_ILLEGAL         0x00006000
 129 #define CG6_FBC_BWRITE0_MASK            0x00006000
 130
 131 #define CG6_FBC_BWRITE1_IGNORE          0x00000000
 132 #define CG6_FBC_BWRITE1_ENABLE          0x00000800
 133 #define CG6_FBC_BWRITE1_DISABLE         0x00001000
 134 #define CG6_FBC_BWRITE1_ILLEGAL         0x00001800
 135 #define CG6_FBC_BWRITE1_MASK            0x00001800
 136
 137 #define CG6_FBC_BREAD_IGNORE            0x00000000
 138 #define CG6_FBC_BREAD_0                 0x00000200
 139 #define CG6_FBC_BREAD_1                 0x00000400
 140 #define CG6_FBC_BREAD_ILLEGAL           0x00000600
 141 #define CG6_FBC_BREAD_MASK              0x00000600
 142
 143 #define CG6_FBC_BDISP_IGNORE            0x00000000
 144 #define CG6_FBC_BDISP_0                 0x00000080
 145 #define CG6_FBC_BDISP_1                 0x00000100
 146 #define CG6_FBC_BDISP_ILLEGAL           0x00000180
 147 #define CG6_FBC_BDISP_MASK              0x00000180
 148
 149 #define CG6_FBC_INDEX_MOD               0x00000040
 150 #define CG6_FBC_INDEX_MASK              0x00000030
 151
 152 /* THC definitions */
 153 #define CG6_THC_MISC_REV_SHIFT       16
 154 #define CG6_THC_MISC_REV_MASK        15
 155 #define CG6_THC_MISC_RESET           (1 << 12)
 156 #define CG6_THC_MISC_VIDEO           (1 << 10)
 157 #define CG6_THC_MISC_SYNC            (1 << 9)
 158 #define CG6_THC_MISC_VSYNC           (1 << 8)
 159 #define CG6_THC_MISC_SYNC_ENAB       (1 << 7)
 160 #define CG6_THC_MISC_CURS_RES        (1 << 6)
 161 #define CG6_THC_MISC_INT_ENAB        (1 << 5)
 162 #define CG6_THC_MISC_INT             (1 << 4)
 163 #define CG6_THC_MISC_INIT            0x9f
 164
 165 /* The contents are unknown */
 166 struct cg6_tec {
 167         int tec_matrix;
 168         int tec_clip;
 169         int tec_vdc;
 170 };
 171
 172 struct cg6_thc {
 173         u32 thc_pad0[512];
 174         u32 thc_hs;             /* hsync timing */
 175         u32 thc_hsdvs;
 176         u32 thc_hd;
 177         u32 thc_vs;             /* vsync timing */
 178         u32 thc_vd;
 179         u32 thc_refresh;
 180         u32 thc_misc;
 181         u32 thc_pad1[56];
 182         u32 thc_cursxy; /* cursor x,y position (16 bits each) */
 183         u32 thc_cursmask[32];   /* cursor mask bits */
 184         u32 thc_cursbits[32];   /* what to show where mask enabled */
 185 };
 186
 187 struct cg6_fbc {
 188         u32     xxx0[1];
 189         u32     mode;
 190         u32     clip;
 191         u32     xxx1[1];
 192         u32     s;
 193         u32     draw;
 194         u32     blit;
 195         u32     font;
 196         u32     xxx2[24];
 197         u32     x0, y0, z0, color0;
 198         u32     x1, y1, z1, color1;
 199         u32     x2, y2, z2, color2;
 200         u32     x3, y3, z3, color3;
 201         u32     offx, offy;
 202         u32     xxx3[2];
 203         u32     incx, incy;
 204         u32     xxx4[2];
 205         u32     clipminx, clipminy;
 206         u32     xxx5[2];
 207         u32     clipmaxx, clipmaxy;
 208         u32     xxx6[2];
 209         u32     fg;
 210         u32     bg;
 211         u32     alu;
 212         u32     pm;
 213         u32     pixelm;
 214         u32     xxx7[2];
 215         u32     patalign;
 216         u32     pattern[8];
 217         u32     xxx8[432];
 218         u32     apointx, apointy, apointz;
 219         u32     xxx9[1];
 220         u32     rpointx, rpointy, rpointz;
 221         u32     xxx10[5];
 222         u32     pointr, pointg, pointb, pointa;
 223         u32     alinex, aliney, alinez;
 224         u32     xxx11[1];
 225         u32     rlinex, rliney, rlinez;
 226         u32     xxx12[5];
 227         u32     liner, lineg, lineb, linea;
 228         u32     atrix, atriy, atriz;
 229         u32     xxx13[1];
 230         u32     rtrix, rtriy, rtriz;
 231         u32     xxx14[5];
 232         u32     trir, trig, trib, tria;
 233         u32     aquadx, aquady, aquadz;
 234         u32     xxx15[1];
 235         u32     rquadx, rquady, rquadz;
 236         u32     xxx16[5];
 237         u32     quadr, quadg, quadb, quada;
 238         u32     arectx, arecty, arectz;
 239         u32     xxx17[1];
 240         u32     rrectx, rrecty, rrectz;
 241         u32     xxx18[5];
 242         u32     rectr, rectg, rectb, recta;
 243 };
 244
 245 struct bt_regs {
 246         u32 addr;
 247         u32 color_map;
 248         u32 control;
 249         u32 cursor;
 250 };
 251
 252 struct cg6_par {
 253         spinlock_t              lock;
 254         struct bt_regs          __iomem *bt;
 255         struct cg6_fbc          __iomem *fbc;
 256         struct cg6_thc          __iomem *thc;
 257         struct cg6_tec          __iomem *tec;
 258         u32                     __iomem *fhc;
 259
 260         u32                     flags;
 261 #define CG6_FLAG_BLANKED        0x00000001
 262
 263         unsigned long           physbase;
 264         unsigned long           which_io;
 265         unsigned long           fbsize;
 266 };
 267
 268 static int cg6_sync(struct fb_info *info)
 269 {
 270         struct cg6_par *par = (struct cg6_par *) info->par;
 271         struct cg6_fbc __iomem *fbc = par->fbc;
 272         int limit = 10000;
 273
 274         do {
 275                 if (!(sbus_readl(&fbc->s) & 0x10000000))
 276                         break;
 277                 udelay(10);
 278         } while (--limit > 0);
 279
 280         return 0;
 281 }
 282
 283 /**
 284  *      cg6_fillrect - REQUIRED function. Can use generic routines if
 285  *                     non acclerated hardware and packed pixel based.
 286  *                     Draws a rectangle on the screen.
 287  *
 288  *      @info: frame buffer structure that represents a single frame buffer
 289  *      @rect: structure defining the rectagle and operation.
 290  */
 291 static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 292 {
 293         struct cg6_par *par = (struct cg6_par *) info->par;
 294         struct cg6_fbc __iomem *fbc = par->fbc;
 295         unsigned long flags;
 296         s32 val;
 297
 298         /* XXX doesn't handle ROP_XOR */
 299
 300         spin_lock_irqsave(&par->lock, flags);
 301         cg6_sync(info);
 302         sbus_writel(rect->color, &fbc->fg);
 303         sbus_writel(~(u32)0, &fbc->pixelm);
 304         sbus_writel(0xea80ff00, &fbc->alu);
 305         sbus_writel(0, &fbc->s);
 306         sbus_writel(0, &fbc->clip);
 307         sbus_writel(~(u32)0, &fbc->pm);
 308         sbus_writel(rect->dy, &fbc->arecty);
 309         sbus_writel(rect->dx, &fbc->arectx);
 310         sbus_writel(rect->dy + rect->height, &fbc->arecty);
 311         sbus_writel(rect->dx + rect->width, &fbc->arectx);
 312         do {
 313                 val = sbus_readl(&fbc->draw);
 314         } while (val < 0 && (val & 0x20000000));
 315         spin_unlock_irqrestore(&par->lock, flags);
 316 }
 317
 318 /**
 319  *      cg6_imageblit - REQUIRED function. Can use generic routines if
 320  *                      non acclerated hardware and packed pixel based.
 321  *                      Copies a image from system memory to the screen.
 322  *
 323  *      @info: frame buffer structure that represents a single frame buffer
 324  *      @image: structure defining the image.
 325  */
 326 static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
 327 {
 328         struct cg6_par *par = (struct cg6_par *) info->par;
 329         struct cg6_fbc __iomem *fbc = par->fbc;
 330         const u8 *data = image->data;
 331         unsigned long flags;
 332         u32 x, y;
 333         int i, width;
 334
 335         if (image->depth > 1) {
 336                 cfb_imageblit(info, image);
 337                 return;
 338         }
 339
 340         spin_lock_irqsave(&par->lock, flags);
 341
 342         cg6_sync(info);
 343
 344         sbus_writel(image->fg_color, &fbc->fg);
 345         sbus_writel(image->bg_color, &fbc->bg);
 346         sbus_writel(0x140000, &fbc->mode);
 347         sbus_writel(0xe880fc30, &fbc->alu);
 348         sbus_writel(~(u32)0, &fbc->pixelm);
 349         sbus_writel(0, &fbc->s);
 350         sbus_writel(0, &fbc->clip);
 351         sbus_writel(0xff, &fbc->pm);
 352         sbus_writel(32, &fbc->incx);
 353         sbus_writel(0, &fbc->incy);
 354
 355         x = image->dx;
 356         y = image->dy;
 357         for (i = 0; i < image->height; i++) {
 358                 width = image->width;
 359
 360                 while (width >= 32) {
 361                         u32 val;
 362
 363                         sbus_writel(y, &fbc->y0);
 364                         sbus_writel(x, &fbc->x0);
 365                         sbus_writel(x + 32 - 1, &fbc->x1);
 366
 367                         val = ((u32)data[0] << 24) |
 368                               ((u32)data[1] << 16) |
 369                               ((u32)data[2] <<  8) |
 370                               ((u32)data[3] <<  0);
 371                         sbus_writel(val, &fbc->font);
 372
 373                         data += 4;
 374                         x += 32;
 375                         width -= 32;
 376                 }
 377                 if (width) {
 378                         u32 val;
 379
 380                         sbus_writel(y, &fbc->y0);
 381                         sbus_writel(x, &fbc->x0);
 382                         sbus_writel(x + width - 1, &fbc->x1);
 383                         if (width <= 8) {
 384                                 val = (u32) data[0] << 24;
 385                                 data += 1;
 386                         } else if (width <= 16) {
 387                                 val = ((u32) data[0] << 24) |
 388                                       ((u32) data[1] << 16);
 389                                 data += 2;
 390                         } else {
 391                                 val = ((u32) data[0] << 24) |
 392                                       ((u32) data[1] << 16) |
 393                                       ((u32) data[2] <<  8);
 394                                 data += 3;
 395                         }
 396                         sbus_writel(val, &fbc->font);
 397                 }
 398
 399                 y += 1;
 400                 x = image->dx;
 401         }
 402
 403         spin_unlock_irqrestore(&par->lock, flags);
 404 }
 405
 406 /**
 407  *      cg6_setcolreg - Optional function. Sets a color register.
 408  *      @regno: boolean, 0 copy local, 1 get_user() function
 409  *      @red: frame buffer colormap structure
 410  *      @green: The green value which can be up to 16 bits wide
 411  *      @blue:  The blue value which can be up to 16 bits wide.
 412  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 413  *      @info: frame buffer info structure
 414  */
 415 static int cg6_setcolreg(unsigned regno,
 416                          unsigned red, unsigned green, unsigned blue,
 417                          unsigned transp, struct fb_info *info)
 418 {
 419         struct cg6_par *par = (struct cg6_par *) info->par;
 420         struct bt_regs __iomem *bt = par->bt;
 421         unsigned long flags;
 422
 423         if (regno >= 256)
 424                 return 1;
 425
 426         red >>= 8;
 427         green >>= 8;
 428         blue >>= 8;
 429
 430         spin_lock_irqsave(&par->lock, flags);
 431
 432         sbus_writel((u32)regno << 24, &bt->addr);
 433         sbus_writel((u32)red << 24, &bt->color_map);
 434         sbus_writel((u32)green << 24, &bt->color_map);
 435         sbus_writel((u32)blue << 24, &bt->color_map);
 436
 437         spin_unlock_irqrestore(&par->lock, flags);
 438
 439         return 0;
 440 }
 441
 442 /**
 443  *      cg6_blank - Optional function.  Blanks the display.
 444  *      @blank_mode: the blank mode we want.
 445  *      @info: frame buffer structure that represents a single frame buffer
 446  */
 447 static int
 448 cg6_blank(int blank, struct fb_info *info)
 449 {
 450         struct cg6_par *par = (struct cg6_par *) info->par;
 451         struct cg6_thc __iomem *thc = par->thc;
 452         unsigned long flags;
 453         u32 val;
 454
 455         spin_lock_irqsave(&par->lock, flags);
 456
 457         switch (blank) {
 458         case FB_BLANK_UNBLANK: /* Unblanking */
 459                 val = sbus_readl(&thc->thc_misc);
 460                 val |= CG6_THC_MISC_VIDEO;
 461                 sbus_writel(val, &thc->thc_misc);
 462                 par->flags &= ~CG6_FLAG_BLANKED;
 463                 break;
 464
 465         case FB_BLANK_NORMAL: /* Normal blanking */
 466         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 467         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 468         case FB_BLANK_POWERDOWN: /* Poweroff */
 469                 val = sbus_readl(&thc->thc_misc);
 470                 val &= ~CG6_THC_MISC_VIDEO;
 471                 sbus_writel(val, &thc->thc_misc);
 472                 par->flags |= CG6_FLAG_BLANKED;
 473                 break;
 474         }
 475
 476         spin_unlock_irqrestore(&par->lock, flags);
 477
 478         return 0;
 479 }
 480
 481 static struct sbus_mmap_map cg6_mmap_map[] = {
 482         {
 483                 .voff   = CG6_FBC,
 484                 .poff   = CG6_FBC_OFFSET,
 485                 .size   = PAGE_SIZE
 486         },
 487         {
 488                 .voff   = CG6_TEC,
 489                 .poff   = CG6_TEC_OFFSET,
 490                 .size   = PAGE_SIZE
 491         },
 492         {
 493                 .voff   = CG6_BTREGS,
 494                 .poff   = CG6_BROOKTREE_OFFSET,
 495                 .size   = PAGE_SIZE
 496         },
 497         {
 498                 .voff   = CG6_FHC,
 499                 .poff   = CG6_FHC_OFFSET,
 500                 .size   = PAGE_SIZE
 501         },
 502         {
 503                 .voff   = CG6_THC,
 504                 .poff   = CG6_THC_OFFSET,
 505                 .size   = PAGE_SIZE
 506         },
 507         {
 508                 .voff   = CG6_ROM,
 509                 .poff   = CG6_ROM_OFFSET,
 510                 .size   = 0x10000
 511         },
 512         {
 513                 .voff   = CG6_RAM,
 514                 .poff   = CG6_RAM_OFFSET,
 515                 .size   = SBUS_MMAP_FBSIZE(1)
 516         },
 517         {
 518                 .voff   = CG6_DHC,
 519                 .poff   = CG6_DHC_OFFSET,
 520                 .size   = 0x40000
 521         },
 522         { .size = 0 }
 523 };
 524
 525 static int cg6_mmap(struct fb_info *info, struct vm_area_struct *vma)
 526 {
 527         struct cg6_par *par = (struct cg6_par *)info->par;
 528
 529         return sbusfb_mmap_helper(cg6_mmap_map,
 530                                   par->physbase, par->fbsize,
 531                                   par->which_io, vma);
 532 }
 533
 534 static int cg6_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 535 {
 536         struct cg6_par *par = (struct cg6_par *) info->par;
 537
 538         return sbusfb_ioctl_helper(cmd, arg, info,
 539                                    FBTYPE_SUNFAST_COLOR, 8, par->fbsize);
 540 }
 541
 542 /*
 543  *  Initialisation
 544  */
 545
 546 static void
 547 cg6_init_fix(struct fb_info *info, int linebytes)
 548 {
 549         struct cg6_par *par = (struct cg6_par *)info->par;
 550         const char *cg6_cpu_name, *cg6_card_name;
 551         u32 conf;
 552
 553         conf = sbus_readl(par->fhc);
 554         switch(conf & CG6_FHC_CPU_MASK) {
 555         case CG6_FHC_CPU_SPARC:
 556                 cg6_cpu_name = "sparc";
 557                 break;
 558         case CG6_FHC_CPU_68020:
 559                 cg6_cpu_name = "68020";
 560                 break;
 561         default:
 562                 cg6_cpu_name = "i386";
 563                 break;
 564         };
 565         if (((conf >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK) >= 11) {
 566                 if (par->fbsize <= 0x100000) {
 567                         cg6_card_name = "TGX";
 568                 } else {
 569                         cg6_card_name = "TGX+";
 570                 }
 571         } else {
 572                 if (par->fbsize <= 0x100000) {
 573                         cg6_card_name = "GX";
 574                 } else {
 575                         cg6_card_name = "GX+";
 576                 }
 577         }
 578
 579         sprintf(info->fix.id, "%s %s", cg6_card_name, cg6_cpu_name);
 580         info->fix.id[sizeof(info->fix.id)-1] = 0;
 581
 582         info->fix.type = FB_TYPE_PACKED_PIXELS;
 583         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 584
 585         info->fix.line_length = linebytes;
 586
 587         info->fix.accel = FB_ACCEL_SUN_CGSIX;
 588 }
 589
 590 /* Initialize Brooktree DAC */
 591 static void cg6_bt_init(struct cg6_par *par)
 592 {
 593         struct bt_regs __iomem *bt = par->bt;
 594
 595         sbus_writel(0x04 << 24, &bt->addr);         /* color planes */
 596         sbus_writel(0xff << 24, &bt->control);
 597         sbus_writel(0x05 << 24, &bt->addr);
 598         sbus_writel(0x00 << 24, &bt->control);
 599         sbus_writel(0x06 << 24, &bt->addr);         /* overlay plane */
 600         sbus_writel(0x73 << 24, &bt->control);
 601         sbus_writel(0x07 << 24, &bt->addr);
 602         sbus_writel(0x00 << 24, &bt->control);
 603 }
 604
 605 static void cg6_chip_init(struct fb_info *info)
 606 {
 607         struct cg6_par *par = (struct cg6_par *) info->par;
 608         struct cg6_tec __iomem *tec = par->tec;
 609         struct cg6_fbc __iomem *fbc = par->fbc;
 610         u32 rev, conf, mode;
 611         int i;
 612
 613         /* Turn off stuff in the Transform Engine. */
 614         sbus_writel(0, &tec->tec_matrix);
 615         sbus_writel(0, &tec->tec_clip);
 616         sbus_writel(0, &tec->tec_vdc);
 617
 618         /* Take care of bugs in old revisions. */
 619         rev = (sbus_readl(par->fhc) >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK;
 620         if (rev < 5) {
 621                 conf = (sbus_readl(par->fhc) & CG6_FHC_RES_MASK) |
 622                         CG6_FHC_CPU_68020 | CG6_FHC_TEST |
 623                         (11 << CG6_FHC_TEST_X_SHIFT) |
 624                         (11 << CG6_FHC_TEST_Y_SHIFT);
 625                 if (rev < 2)
 626                         conf |= CG6_FHC_DST_DISABLE;
 627                 sbus_writel(conf, par->fhc);
 628         }
 629
 630         /* Set things in the FBC. Bad things appear to happen if we do
 631          * back to back store/loads on the mode register, so copy it
 632          * out instead. */
 633         mode = sbus_readl(&fbc->mode);
 634         do {
 635                 i = sbus_readl(&fbc->s);
 636         } while (i & 0x10000000);
 637         mode &= ~(CG6_FBC_BLIT_MASK | CG6_FBC_MODE_MASK |
 638                        CG6_FBC_DRAW_MASK | CG6_FBC_BWRITE0_MASK |
 639                        CG6_FBC_BWRITE1_MASK | CG6_FBC_BREAD_MASK |
 640                        CG6_FBC_BDISP_MASK);
 641         mode |= (CG6_FBC_BLIT_SRC | CG6_FBC_MODE_COLOR8 |
 642                       CG6_FBC_DRAW_RENDER | CG6_FBC_BWRITE0_ENABLE |
 643                       CG6_FBC_BWRITE1_DISABLE | CG6_FBC_BREAD_0 |
 644                       CG6_FBC_BDISP_0);
 645         sbus_writel(mode, &fbc->mode);
 646
 647         sbus_writel(0, &fbc->clip);
 648         sbus_writel(0, &fbc->offx);
 649         sbus_writel(0, &fbc->offy);
 650         sbus_writel(0, &fbc->clipminx);
 651         sbus_writel(0, &fbc->clipminy);
 652         sbus_writel(info->var.xres - 1, &fbc->clipmaxx);
 653         sbus_writel(info->var.yres - 1, &fbc->clipmaxy);
 654 }
 655
 656 struct all_info {
 657         struct fb_info info;
 658         struct cg6_par par;
 659 };
 660
 661 static void cg6_unmap_regs(struct of_device *op, struct all_info *all)
 662 {
 663         if (all->par.fbc)
 664                 of_iounmap(&op->resource[0], all->par.fbc, 4096);
 665         if (all->par.tec)
 666                 of_iounmap(&op->resource[0],
 667                            all->par.tec, sizeof(struct cg6_tec));
 668         if (all->par.thc)
 669                 of_iounmap(&op->resource[0],
 670                            all->par.thc, sizeof(struct cg6_thc));
 671         if (all->par.bt)
 672                 of_iounmap(&op->resource[0],
 673                            all->par.bt, sizeof(struct bt_regs));
 674         if (all->par.fhc)
 675                 of_iounmap(&op->resource[0],
 676                            all->par.fhc, sizeof(u32));
 677
 678         if (all->info.screen_base)
 679                 of_iounmap(&op->resource[0],
 680                            all->info.screen_base, all->par.fbsize);
 681 }
 682
 683 static int __devinit cg6_init_one(struct of_device *op)
 684 {
 685         struct device_node *dp = op->node;
 686         struct all_info *all;
 687         int linebytes, err;
 688
 689         all = kzalloc(sizeof(*all), GFP_KERNEL);
 690         if (!all)
 691                 return -ENOMEM;
 692
 693         spin_lock_init(&all->par.lock);
 694
 695         all->par.physbase = op->resource[0].start;
 696         all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
 697
 698         sbusfb_fill_var(&all->info.var, dp->node, 8);
 699         all->info.var.red.length = 8;
 700         all->info.var.green.length = 8;
 701         all->info.var.blue.length = 8;
 702
 703         linebytes = of_getintprop_default(dp, "linebytes",
 704                                           all->info.var.xres);
 705         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
 706         if (of_find_property(dp, "dblbuf", NULL))
 707                 all->par.fbsize *= 4;
 708
 709         all->par.fbc = of_ioremap(&op->resource[0], CG6_FBC_OFFSET,
 710                                   4096, "cgsix fbc");
 711         all->par.tec = of_ioremap(&op->resource[0], CG6_TEC_OFFSET,
 712                                   sizeof(struct cg6_tec), "cgsix tec");
 713         all->par.thc = of_ioremap(&op->resource[0], CG6_THC_OFFSET,
 714                                   sizeof(struct cg6_thc), "cgsix thc");
 715         all->par.bt = of_ioremap(&op->resource[0], CG6_BROOKTREE_OFFSET,
 716                                  sizeof(struct bt_regs), "cgsix dac");
 717         all->par.fhc = of_ioremap(&op->resource[0], CG6_FHC_OFFSET,
 718                                   sizeof(u32), "cgsix fhc");
 719
 720         all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_IMAGEBLIT |
 721                           FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 722         all->info.fbops = &cg6_ops;
 723
 724         all->info.screen_base =  of_ioremap(&op->resource[0], CG6_RAM_OFFSET,
 725                                             all->par.fbsize, "cgsix ram");
 726         if (!all->par.fbc || !all->par.tec || !all->par.thc ||
 727             !all->par.bt || !all->par.fhc || !all->info.screen_base) {
 728                 cg6_unmap_regs(op, all);
 729                 kfree(all);
 730                 return -ENOMEM;
 731         }
 732
 733         all->info.par = &all->par;
 734
 735         all->info.var.accel_flags = FB_ACCELF_TEXT;
 736
 737         cg6_bt_init(&all->par);
 738         cg6_chip_init(&all->info);
 739         cg6_blank(0, &all->info);
 740
 741         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 742                 cg6_unmap_regs(op, all);
 743                 kfree(all);
 744                 return -ENOMEM;
 745         }
 746
 747         fb_set_cmap(&all->info.cmap, &all->info);
 748         cg6_init_fix(&all->info, linebytes);
 749
 750         err = register_framebuffer(&all->info);
 751         if (err < 0) {
 752                 cg6_unmap_regs(op, all);
 753                 fb_dealloc_cmap(&all->info.cmap);
 754                 kfree(all);
 755                 return err;
 756         }
 757
 758         dev_set_drvdata(&op->dev, all);
 759
 760         printk("%s: CGsix [%s] at %lx:%lx\n",
 761                dp->full_name,
 762                all->info.fix.id,
 763                all->par.which_io, all->par.physbase);
 764
 765         return 0;
 766 }
 767
 768 static int __devinit cg6_probe(struct of_device *dev, const struct of_device_id *match)
 769 {
 770         struct of_device *op = to_of_device(&dev->dev);
 771
 772         return cg6_init_one(op);
 773 }
 774
 775 static int __devexit cg6_remove(struct of_device *op)
 776 {
 777         struct all_info *all = dev_get_drvdata(&op->dev);
 778
 779         unregister_framebuffer(&all->info);
 780         fb_dealloc_cmap(&all->info.cmap);
 781
 782         cg6_unmap_regs(op, all);
 783
 784         kfree(all);
 785
 786         dev_set_drvdata(&op->dev, NULL);
 787
 788         return 0;
 789 }
 790
 791 static struct of_device_id cg6_match[] = {
 792         {
 793                 .name = "cgsix",
 794         },
 795         {
 796                 .name = "cgthree+",
 797         },
 798         {},
 799 };
 800 MODULE_DEVICE_TABLE(of, cg6_match);
 801
 802 static struct of_platform_driver cg6_driver = {
 803         .name           = "cg6",
 804         .match_table    = cg6_match,
 805         .probe          = cg6_probe,
 806         .remove         = __devexit_p(cg6_remove),
 807 };
 808
 809 static int __init cg6_init(void)
 810 {
 811         if (fb_get_options("cg6fb", NULL))
 812                 return -ENODEV;
 813
 814         return of_register_driver(&cg6_driver, &of_bus_type);
 815 }
 816
 817 static void __exit cg6_exit(void)
 818 {
 819         of_unregister_driver(&cg6_driver);
 820 }
 821
 822 module_init(cg6_init);
 823 module_exit(cg6_exit);
 824
 825 MODULE_DESCRIPTION("framebuffer driver for CGsix chipsets");
 826 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 827 MODULE_VERSION("2.0");
 828 MODULE_LICENSE("GPL");