drivers/video/fbdev/ffb.c

   1 /* ffb.c: Creator/Elite3D frame buffer driver
   2  *
   3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
   5  *
   6  * Driver layout based loosely on tgafb.c, see that file for credits.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/delay.h>
  14 #include <linux/init.h>
  15 #include <linux/fb.h>
  16 #include <linux/mm.h>
  17 #include <linux/timer.h>
  18 #include <linux/of_device.h>
  19
  20 #include <asm/io.h>
  21 #include <asm/upa.h>
  22 #include <asm/fbio.h>
  23
  24 #include "sbuslib.h"
  25
  26 /*
  27  * Local functions.
  28  */
  29
  30 static int ffb_setcolreg(unsigned, unsigned, unsigned, unsigned,
  31                          unsigned, struct fb_info *);
  32 static int ffb_blank(int, struct fb_info *);
  33
  34 static void ffb_imageblit(struct fb_info *, const struct fb_image *);
  35 static void ffb_fillrect(struct fb_info *, const struct fb_fillrect *);
  36 static void ffb_copyarea(struct fb_info *, const struct fb_copyarea *);
  37 static int ffb_sync(struct fb_info *);
  38 static int ffb_mmap(struct fb_info *, struct vm_area_struct *);
  39 static int ffb_ioctl(struct fb_info *, unsigned int, unsigned long);
  40 static int ffb_pan_display(struct fb_var_screeninfo *, struct fb_info *);
  41
  42 /*
  43  *  Frame buffer operations
  44  */
  45
  46 static struct fb_ops ffb_ops = {
  47         .owner                  = THIS_MODULE,
  48         .fb_setcolreg           = ffb_setcolreg,
  49         .fb_blank               = ffb_blank,
  50         .fb_pan_display         = ffb_pan_display,
  51         .fb_fillrect            = ffb_fillrect,
  52         .fb_copyarea            = ffb_copyarea,
  53         .fb_imageblit           = ffb_imageblit,
  54         .fb_sync                = ffb_sync,
  55         .fb_mmap                = ffb_mmap,
  56         .fb_ioctl               = ffb_ioctl,
  57 #ifdef CONFIG_COMPAT
  58         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  59 #endif
  60 };
  61
  62 /* Register layout and definitions */
  63 #define FFB_SFB8R_VOFF          0x00000000
  64 #define FFB_SFB8G_VOFF          0x00400000
  65 #define FFB_SFB8B_VOFF          0x00800000
  66 #define FFB_SFB8X_VOFF          0x00c00000
  67 #define FFB_SFB32_VOFF          0x01000000
  68 #define FFB_SFB64_VOFF          0x02000000
  69 #define FFB_FBC_REGS_VOFF       0x04000000
  70 #define FFB_BM_FBC_REGS_VOFF    0x04002000
  71 #define FFB_DFB8R_VOFF          0x04004000
  72 #define FFB_DFB8G_VOFF          0x04404000
  73 #define FFB_DFB8B_VOFF          0x04804000
  74 #define FFB_DFB8X_VOFF          0x04c04000
  75 #define FFB_DFB24_VOFF          0x05004000
  76 #define FFB_DFB32_VOFF          0x06004000
  77 #define FFB_DFB422A_VOFF        0x07004000      /* DFB 422 mode write to A */
  78 #define FFB_DFB422AD_VOFF       0x07804000      /* DFB 422 mode with line doubling */
  79 #define FFB_DFB24B_VOFF         0x08004000      /* DFB 24bit mode write to B */
  80 #define FFB_DFB422B_VOFF        0x09004000      /* DFB 422 mode write to B */
  81 #define FFB_DFB422BD_VOFF       0x09804000      /* DFB 422 mode with line doubling */
  82 #define FFB_SFB16Z_VOFF         0x0a004000      /* 16bit mode Z planes */
  83 #define FFB_SFB8Z_VOFF          0x0a404000      /* 8bit mode Z planes */
  84 #define FFB_SFB422_VOFF         0x0ac04000      /* SFB 422 mode write to A/B */
  85 #define FFB_SFB422D_VOFF        0x0b404000      /* SFB 422 mode with line doubling */
  86 #define FFB_FBC_KREGS_VOFF      0x0bc04000
  87 #define FFB_DAC_VOFF            0x0bc06000
  88 #define FFB_PROM_VOFF           0x0bc08000
  89 #define FFB_EXP_VOFF            0x0bc18000
  90
  91 #define FFB_SFB8R_POFF          0x04000000UL
  92 #define FFB_SFB8G_POFF          0x04400000UL
  93 #define FFB_SFB8B_POFF          0x04800000UL
  94 #define FFB_SFB8X_POFF          0x04c00000UL
  95 #define FFB_SFB32_POFF          0x05000000UL
  96 #define FFB_SFB64_POFF          0x06000000UL
  97 #define FFB_FBC_REGS_POFF       0x00600000UL
  98 #define FFB_BM_FBC_REGS_POFF    0x00600000UL
  99 #define FFB_DFB8R_POFF          0x01000000UL
 100 #define FFB_DFB8G_POFF          0x01400000UL
 101 #define FFB_DFB8B_POFF          0x01800000UL
 102 #define FFB_DFB8X_POFF          0x01c00000UL
 103 #define FFB_DFB24_POFF          0x02000000UL
 104 #define FFB_DFB32_POFF          0x03000000UL
 105 #define FFB_FBC_KREGS_POFF      0x00610000UL
 106 #define FFB_DAC_POFF            0x00400000UL
 107 #define FFB_PROM_POFF           0x00000000UL
 108 #define FFB_EXP_POFF            0x00200000UL
 109 #define FFB_DFB422A_POFF        0x09000000UL
 110 #define FFB_DFB422AD_POFF       0x09800000UL
 111 #define FFB_DFB24B_POFF         0x0a000000UL
 112 #define FFB_DFB422B_POFF        0x0b000000UL
 113 #define FFB_DFB422BD_POFF       0x0b800000UL
 114 #define FFB_SFB16Z_POFF         0x0c800000UL
 115 #define FFB_SFB8Z_POFF          0x0c000000UL
 116 #define FFB_SFB422_POFF         0x0d000000UL
 117 #define FFB_SFB422D_POFF        0x0d800000UL
 118
 119 /* Draw operations */
 120 #define FFB_DRAWOP_DOT          0x00
 121 #define FFB_DRAWOP_AADOT        0x01
 122 #define FFB_DRAWOP_BRLINECAP    0x02
 123 #define FFB_DRAWOP_BRLINEOPEN   0x03
 124 #define FFB_DRAWOP_DDLINE       0x04
 125 #define FFB_DRAWOP_AALINE       0x05
 126 #define FFB_DRAWOP_TRIANGLE     0x06
 127 #define FFB_DRAWOP_POLYGON      0x07
 128 #define FFB_DRAWOP_RECTANGLE    0x08
 129 #define FFB_DRAWOP_FASTFILL     0x09
 130 #define FFB_DRAWOP_BCOPY        0x0a
 131 #define FFB_DRAWOP_VSCROLL      0x0b
 132
 133 /* Pixel processor control */
 134 /* Force WID */
 135 #define FFB_PPC_FW_DISABLE      0x800000
 136 #define FFB_PPC_FW_ENABLE       0xc00000
 137 /* Auxiliary clip */
 138 #define FFB_PPC_ACE_DISABLE     0x040000
 139 #define FFB_PPC_ACE_AUX_SUB     0x080000
 140 #define FFB_PPC_ACE_AUX_ADD     0x0c0000
 141 /* Depth cue */
 142 #define FFB_PPC_DCE_DISABLE     0x020000
 143 #define FFB_PPC_DCE_ENABLE      0x030000
 144 /* Alpha blend */
 145 #define FFB_PPC_ABE_DISABLE     0x008000
 146 #define FFB_PPC_ABE_ENABLE      0x00c000
 147 /* View clip */
 148 #define FFB_PPC_VCE_DISABLE     0x001000
 149 #define FFB_PPC_VCE_2D          0x002000
 150 #define FFB_PPC_VCE_3D          0x003000
 151 /* Area pattern */
 152 #define FFB_PPC_APE_DISABLE     0x000800
 153 #define FFB_PPC_APE_ENABLE      0x000c00
 154 /* Transparent background */
 155 #define FFB_PPC_TBE_OPAQUE      0x000200
 156 #define FFB_PPC_TBE_TRANSPARENT 0x000300
 157 /* Z source */
 158 #define FFB_PPC_ZS_VAR          0x000080
 159 #define FFB_PPC_ZS_CONST        0x0000c0
 160 /* Y source */
 161 #define FFB_PPC_YS_VAR          0x000020
 162 #define FFB_PPC_YS_CONST        0x000030
 163 /* X source */
 164 #define FFB_PPC_XS_WID          0x000004
 165 #define FFB_PPC_XS_VAR          0x000008
 166 #define FFB_PPC_XS_CONST        0x00000c
 167 /* Color (BGR) source */
 168 #define FFB_PPC_CS_VAR          0x000002
 169 #define FFB_PPC_CS_CONST        0x000003
 170
 171 #define FFB_ROP_NEW             0x83
 172 #define FFB_ROP_OLD             0x85
 173 #define FFB_ROP_NEW_XOR_OLD     0x86
 174
 175 #define FFB_UCSR_FIFO_MASK      0x00000fff
 176 #define FFB_UCSR_FB_BUSY        0x01000000
 177 #define FFB_UCSR_RP_BUSY        0x02000000
 178 #define FFB_UCSR_ALL_BUSY       (FFB_UCSR_RP_BUSY|FFB_UCSR_FB_BUSY)
 179 #define FFB_UCSR_READ_ERR       0x40000000
 180 #define FFB_UCSR_FIFO_OVFL      0x80000000
 181 #define FFB_UCSR_ALL_ERRORS     (FFB_UCSR_READ_ERR|FFB_UCSR_FIFO_OVFL)
 182
 183 struct ffb_fbc {
 184         /* Next vertex registers */
 185         u32     xxx1[3];
 186         u32     alpha;
 187         u32     red;
 188         u32     green;
 189         u32     blue;
 190         u32     depth;
 191         u32     y;
 192         u32     x;
 193         u32     xxx2[2];
 194         u32     ryf;
 195         u32     rxf;
 196         u32     xxx3[2];
 197
 198         u32     dmyf;
 199         u32     dmxf;
 200         u32     xxx4[2];
 201         u32     ebyi;
 202         u32     ebxi;
 203         u32     xxx5[2];
 204         u32     by;
 205         u32     bx;
 206         u32     dy;
 207         u32     dx;
 208         u32     bh;
 209         u32     bw;
 210         u32     xxx6[2];
 211
 212         u32     xxx7[32];
 213
 214         /* Setup unit vertex state register */
 215         u32     suvtx;
 216         u32     xxx8[63];
 217
 218         /* Control registers */
 219         u32     ppc;
 220         u32     wid;
 221         u32     fg;
 222         u32     bg;
 223         u32     consty;
 224         u32     constz;
 225         u32     xclip;
 226         u32     dcss;
 227         u32     vclipmin;
 228         u32     vclipmax;
 229         u32     vclipzmin;
 230         u32     vclipzmax;
 231         u32     dcsf;
 232         u32     dcsb;
 233         u32     dczf;
 234         u32     dczb;
 235
 236         u32     xxx9;
 237         u32     blendc;
 238         u32     blendc1;
 239         u32     blendc2;
 240         u32     fbramitc;
 241         u32     fbc;
 242         u32     rop;
 243         u32     cmp;
 244         u32     matchab;
 245         u32     matchc;
 246         u32     magnab;
 247         u32     magnc;
 248         u32     fbcfg0;
 249         u32     fbcfg1;
 250         u32     fbcfg2;
 251         u32     fbcfg3;
 252
 253         u32     ppcfg;
 254         u32     pick;
 255         u32     fillmode;
 256         u32     fbramwac;
 257         u32     pmask;
 258         u32     xpmask;
 259         u32     ypmask;
 260         u32     zpmask;
 261         u32     clip0min;
 262         u32     clip0max;
 263         u32     clip1min;
 264         u32     clip1max;
 265         u32     clip2min;
 266         u32     clip2max;
 267         u32     clip3min;
 268         u32     clip3max;
 269
 270         /* New 3dRAM III support regs */
 271         u32     rawblend2;
 272         u32     rawpreblend;
 273         u32     rawstencil;
 274         u32     rawstencilctl;
 275         u32     threedram1;
 276         u32     threedram2;
 277         u32     passin;
 278         u32     rawclrdepth;
 279         u32     rawpmask;
 280         u32     rawcsrc;
 281         u32     rawmatch;
 282         u32     rawmagn;
 283         u32     rawropblend;
 284         u32     rawcmp;
 285         u32     rawwac;
 286         u32     fbramid;
 287
 288         u32     drawop;
 289         u32     xxx10[2];
 290         u32     fontlpat;
 291         u32     xxx11;
 292         u32     fontxy;
 293         u32     fontw;
 294         u32     fontinc;
 295         u32     font;
 296         u32     xxx12[3];
 297         u32     blend2;
 298         u32     preblend;
 299         u32     stencil;
 300         u32     stencilctl;
 301
 302         u32     xxx13[4];
 303         u32     dcss1;
 304         u32     dcss2;
 305         u32     dcss3;
 306         u32     widpmask;
 307         u32     dcs2;
 308         u32     dcs3;
 309         u32     dcs4;
 310         u32     xxx14;
 311         u32     dcd2;
 312         u32     dcd3;
 313         u32     dcd4;
 314         u32     xxx15;
 315
 316         u32     pattern[32];
 317
 318         u32     xxx16[256];
 319
 320         u32     devid;
 321         u32     xxx17[63];
 322
 323         u32     ucsr;
 324         u32     xxx18[31];
 325
 326         u32     mer;
 327 };
 328
 329 struct ffb_dac {
 330         u32     type;
 331         u32     value;
 332         u32     type2;
 333         u32     value2;
 334 };
 335
 336 #define FFB_DAC_UCTRL           0x1001 /* User Control */
 337 #define FFB_DAC_UCTRL_MANREV    0x00000f00 /* 4-bit Manufacturing Revision */
 338 #define FFB_DAC_UCTRL_MANREV_SHIFT 8
 339 #define FFB_DAC_TGEN            0x6000 /* Timing Generator */
 340 #define FFB_DAC_TGEN_VIDE       0x00000001 /* Video Enable */
 341 #define FFB_DAC_DID             0x8000 /* Device Identification */
 342 #define FFB_DAC_DID_PNUM        0x0ffff000 /* Device Part Number */
 343 #define FFB_DAC_DID_PNUM_SHIFT  12
 344 #define FFB_DAC_DID_REV         0xf0000000 /* Device Revision */
 345 #define FFB_DAC_DID_REV_SHIFT   28
 346
 347 #define FFB_DAC_CUR_CTRL        0x100
 348 #define FFB_DAC_CUR_CTRL_P0     0x00000001
 349 #define FFB_DAC_CUR_CTRL_P1     0x00000002
 350
 351 struct ffb_par {
 352         spinlock_t              lock;
 353         struct ffb_fbc __iomem  *fbc;
 354         struct ffb_dac __iomem  *dac;
 355
 356         u32                     flags;
 357 #define FFB_FLAG_AFB            0x00000001 /* AFB m3 or m6 */
 358 #define FFB_FLAG_BLANKED        0x00000002 /* screen is blanked */
 359 #define FFB_FLAG_INVCURSOR      0x00000004 /* DAC has inverted cursor logic */
 360
 361         u32                     fg_cache __attribute__((aligned (8)));
 362         u32                     bg_cache;
 363         u32                     rop_cache;
 364
 365         int                     fifo_cache;
 366
 367         unsigned long           physbase;
 368         unsigned long           fbsize;
 369
 370         int                     board_type;
 371
 372         u32                     pseudo_palette[16];
 373 };
 374
 375 static void FFBFifo(struct ffb_par *par, int n)
 376 {
 377         struct ffb_fbc __iomem *fbc;
 378         int cache = par->fifo_cache;
 379
 380         if (cache - n < 0) {
 381                 fbc = par->fbc;
 382                 do {
 383                         cache = (upa_readl(&fbc->ucsr) & FFB_UCSR_FIFO_MASK);
 384                         cache -= 8;
 385                 } while (cache - n < 0);
 386         }
 387         par->fifo_cache = cache - n;
 388 }
 389
 390 static void FFBWait(struct ffb_par *par)
 391 {
 392         struct ffb_fbc __iomem *fbc;
 393         int limit = 10000;
 394
 395         fbc = par->fbc;
 396         do {
 397                 if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_BUSY) == 0)
 398                         break;
 399                 if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0) {
 400                         upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);
 401                 }
 402                 udelay(10);
 403         } while (--limit > 0);
 404 }
 405
 406 static int ffb_sync(struct fb_info *p)
 407 {
 408         struct ffb_par *par = (struct ffb_par *)p->par;
 409
 410         FFBWait(par);
 411         return 0;
 412 }
 413
 414 static __inline__ void ffb_rop(struct ffb_par *par, u32 rop)
 415 {
 416         if (par->rop_cache != rop) {
 417                 FFBFifo(par, 1);
 418                 upa_writel(rop, &par->fbc->rop);
 419                 par->rop_cache = rop;
 420         }
 421 }
 422
 423 static void ffb_switch_from_graph(struct ffb_par *par)
 424 {
 425         struct ffb_fbc __iomem *fbc = par->fbc;
 426         struct ffb_dac __iomem *dac = par->dac;
 427         unsigned long flags;
 428
 429         spin_lock_irqsave(&par->lock, flags);
 430         FFBWait(par);
 431         par->fifo_cache = 0;
 432         FFBFifo(par, 7);
 433         upa_writel(FFB_PPC_VCE_DISABLE | FFB_PPC_TBE_OPAQUE |
 434                    FFB_PPC_APE_DISABLE | FFB_PPC_CS_CONST,
 435                    &fbc->ppc);
 436         upa_writel(0x2000707f, &fbc->fbc);
 437         upa_writel(par->rop_cache, &fbc->rop);
 438         upa_writel(0xffffffff, &fbc->pmask);
 439         upa_writel((1 << 16) | (0 << 0), &fbc->fontinc);
 440         upa_writel(par->fg_cache, &fbc->fg);
 441         upa_writel(par->bg_cache, &fbc->bg);
 442         FFBWait(par);
 443
 444         /* Disable cursor.  */
 445         upa_writel(FFB_DAC_CUR_CTRL, &dac->type2);
 446         if (par->flags & FFB_FLAG_INVCURSOR)
 447                 upa_writel(0, &dac->value2);
 448         else
 449                 upa_writel((FFB_DAC_CUR_CTRL_P0 |
 450                             FFB_DAC_CUR_CTRL_P1), &dac->value2);
 451
 452         spin_unlock_irqrestore(&par->lock, flags);
 453 }
 454
 455 static int ffb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 456 {
 457         struct ffb_par *par = (struct ffb_par *)info->par;
 458
 459         /* We just use this to catch switches out of
 460          * graphics mode.
 461          */
 462         ffb_switch_from_graph(par);
 463
 464         if (var->xoffset || var->yoffset || var->vmode)
 465                 return -EINVAL;
 466         return 0;
 467 }
 468
 469 /**
 470  *      ffb_fillrect - Draws a rectangle on the screen.
 471  *
 472  *      @info: frame buffer structure that represents a single frame buffer
 473  *      @rect: structure defining the rectagle and operation.
 474  */
 475 static void ffb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 476 {
 477         struct ffb_par *par = (struct ffb_par *)info->par;
 478         struct ffb_fbc __iomem *fbc = par->fbc;
 479         unsigned long flags;
 480         u32 fg;
 481
 482         BUG_ON(rect->rop != ROP_COPY && rect->rop != ROP_XOR);
 483
 484         fg = ((u32 *)info->pseudo_palette)[rect->color];
 485
 486         spin_lock_irqsave(&par->lock, flags);
 487
 488         if (fg != par->fg_cache) {
 489                 FFBFifo(par, 1);
 490                 upa_writel(fg, &fbc->fg);
 491                 par->fg_cache = fg;
 492         }
 493
 494         ffb_rop(par, rect->rop == ROP_COPY ?
 495                      FFB_ROP_NEW :
 496                      FFB_ROP_NEW_XOR_OLD);
 497
 498         FFBFifo(par, 5);
 499         upa_writel(FFB_DRAWOP_RECTANGLE, &fbc->drawop);
 500         upa_writel(rect->dy, &fbc->by);
 501         upa_writel(rect->dx, &fbc->bx);
 502         upa_writel(rect->height, &fbc->bh);
 503         upa_writel(rect->width, &fbc->bw);
 504
 505         spin_unlock_irqrestore(&par->lock, flags);
 506 }
 507
 508 /**
 509  *      ffb_copyarea - Copies on area of the screen to another area.
 510  *
 511  *      @info: frame buffer structure that represents a single frame buffer
 512  *      @area: structure defining the source and destination.
 513  */
 514
 515 static void ffb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 516 {
 517         struct ffb_par *par = (struct ffb_par *)info->par;
 518         struct ffb_fbc __iomem *fbc = par->fbc;
 519         unsigned long flags;
 520
 521         if (area->dx != area->sx ||
 522             area->dy == area->sy) {
 523                 cfb_copyarea(info, area);
 524                 return;
 525         }
 526
 527         spin_lock_irqsave(&par->lock, flags);
 528
 529         ffb_rop(par, FFB_ROP_OLD);
 530
 531         FFBFifo(par, 7);
 532         upa_writel(FFB_DRAWOP_VSCROLL, &fbc->drawop);
 533         upa_writel(area->sy, &fbc->by);
 534         upa_writel(area->sx, &fbc->bx);
 535         upa_writel(area->dy, &fbc->dy);
 536         upa_writel(area->dx, &fbc->dx);
 537         upa_writel(area->height, &fbc->bh);
 538         upa_writel(area->width, &fbc->bw);
 539
 540         spin_unlock_irqrestore(&par->lock, flags);
 541 }
 542
 543 /**
 544  *      ffb_imageblit - Copies a image from system memory to the screen.
 545  *
 546  *      @info: frame buffer structure that represents a single frame buffer
 547  *      @image: structure defining the image.
 548  */
 549 static void ffb_imageblit(struct fb_info *info, const struct fb_image *image)
 550 {
 551         struct ffb_par *par = (struct ffb_par *)info->par;
 552         struct ffb_fbc __iomem *fbc = par->fbc;
 553         const u8 *data = image->data;
 554         unsigned long flags;
 555         u32 fg, bg, xy;
 556         u64 fgbg;
 557         int i, width, stride;
 558
 559         if (image->depth > 1) {
 560                 cfb_imageblit(info, image);
 561                 return;
 562         }
 563
 564         fg = ((u32 *)info->pseudo_palette)[image->fg_color];
 565         bg = ((u32 *)info->pseudo_palette)[image->bg_color];
 566         fgbg = ((u64) fg << 32) | (u64) bg;
 567         xy = (image->dy << 16) | image->dx;
 568         width = image->width;
 569         stride = ((width + 7) >> 3);
 570
 571         spin_lock_irqsave(&par->lock, flags);
 572
 573         if (fgbg != *(u64 *)&par->fg_cache) {
 574                 FFBFifo(par, 2);
 575                 upa_writeq(fgbg, &fbc->fg);
 576                 *(u64 *)&par->fg_cache = fgbg;
 577         }
 578
 579         if (width >= 32) {
 580                 FFBFifo(par, 1);
 581                 upa_writel(32, &fbc->fontw);
 582         }
 583
 584         while (width >= 32) {
 585                 const u8 *next_data = data + 4;
 586
 587                 FFBFifo(par, 1);
 588                 upa_writel(xy, &fbc->fontxy);
 589                 xy += (32 << 0);
 590
 591                 for (i = 0; i < image->height; i++) {
 592                         u32 val = (((u32)data[0] << 24) |
 593                                    ((u32)data[1] << 16) |
 594                                    ((u32)data[2] <<  8) |
 595                                    ((u32)data[3] <<  0));
 596                         FFBFifo(par, 1);
 597                         upa_writel(val, &fbc->font);
 598
 599                         data += stride;
 600                 }
 601
 602                 data = next_data;
 603                 width -= 32;
 604         }
 605
 606         if (width) {
 607                 FFBFifo(par, 2);
 608                 upa_writel(width, &fbc->fontw);
 609                 upa_writel(xy, &fbc->fontxy);
 610
 611                 for (i = 0; i < image->height; i++) {
 612                         u32 val = (((u32)data[0] << 24) |
 613                                    ((u32)data[1] << 16) |
 614                                    ((u32)data[2] <<  8) |
 615                                    ((u32)data[3] <<  0));
 616                         FFBFifo(par, 1);
 617                         upa_writel(val, &fbc->font);
 618
 619                         data += stride;
 620                 }
 621         }
 622
 623         spin_unlock_irqrestore(&par->lock, flags);
 624 }
 625
 626 static void ffb_fixup_var_rgb(struct fb_var_screeninfo *var)
 627 {
 628         var->red.offset = 0;
 629         var->red.length = 8;
 630         var->green.offset = 8;
 631         var->green.length = 8;
 632         var->blue.offset = 16;
 633         var->blue.length = 8;
 634         var->transp.offset = 0;
 635         var->transp.length = 0;
 636 }
 637
 638 /**
 639  *      ffb_setcolreg - Sets a color register.
 640  *
 641  *      @regno: boolean, 0 copy local, 1 get_user() function
 642  *      @red: frame buffer colormap structure
 643  *      @green: The green value which can be up to 16 bits wide
 644  *      @blue:  The blue value which can be up to 16 bits wide.
 645  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 646  *      @info: frame buffer info structure
 647  */
 648 static int ffb_setcolreg(unsigned regno,
 649                          unsigned red, unsigned green, unsigned blue,
 650                          unsigned transp, struct fb_info *info)
 651 {
 652         u32 value;
 653
 654         if (regno >= 16)
 655                 return 1;
 656
 657         red >>= 8;
 658         green >>= 8;
 659         blue >>= 8;
 660
 661         value = (blue << 16) | (green << 8) | red;
 662         ((u32 *)info->pseudo_palette)[regno] = value;
 663
 664         return 0;
 665 }
 666
 667 /**
 668  *      ffb_blank - Optional function.  Blanks the display.
 669  *      @blank_mode: the blank mode we want.
 670  *      @info: frame buffer structure that represents a single frame buffer
 671  */
 672 static int ffb_blank(int blank, struct fb_info *info)
 673 {
 674         struct ffb_par *par = (struct ffb_par *)info->par;
 675         struct ffb_dac __iomem *dac = par->dac;
 676         unsigned long flags;
 677         u32 val;
 678         int i;
 679
 680         spin_lock_irqsave(&par->lock, flags);
 681
 682         FFBWait(par);
 683
 684         upa_writel(FFB_DAC_TGEN, &dac->type);
 685         val = upa_readl(&dac->value);
 686         switch (blank) {
 687         case FB_BLANK_UNBLANK: /* Unblanking */
 688                 val |= FFB_DAC_TGEN_VIDE;
 689                 par->flags &= ~FFB_FLAG_BLANKED;
 690                 break;
 691
 692         case FB_BLANK_NORMAL: /* Normal blanking */
 693         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 694         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 695         case FB_BLANK_POWERDOWN: /* Poweroff */
 696                 val &= ~FFB_DAC_TGEN_VIDE;
 697                 par->flags |= FFB_FLAG_BLANKED;
 698                 break;
 699         }
 700         upa_writel(FFB_DAC_TGEN, &dac->type);
 701         upa_writel(val, &dac->value);
 702         for (i = 0; i < 10; i++) {
 703                 upa_writel(FFB_DAC_TGEN, &dac->type);
 704                 upa_readl(&dac->value);
 705         }
 706
 707         spin_unlock_irqrestore(&par->lock, flags);
 708
 709         return 0;
 710 }
 711
 712 static struct sbus_mmap_map ffb_mmap_map[] = {
 713         {
 714                 .voff   = FFB_SFB8R_VOFF,
 715                 .poff   = FFB_SFB8R_POFF,
 716                 .size   = 0x0400000
 717         },
 718         {
 719                 .voff   = FFB_SFB8G_VOFF,
 720                 .poff   = FFB_SFB8G_POFF,
 721                 .size   = 0x0400000
 722         },
 723         {
 724                 .voff   = FFB_SFB8B_VOFF,
 725                 .poff   = FFB_SFB8B_POFF,
 726                 .size   = 0x0400000
 727         },
 728         {
 729                 .voff   = FFB_SFB8X_VOFF,
 730                 .poff   = FFB_SFB8X_POFF,
 731                 .size   = 0x0400000
 732         },
 733         {
 734                 .voff   = FFB_SFB32_VOFF,
 735                 .poff   = FFB_SFB32_POFF,
 736                 .size   = 0x1000000
 737         },
 738         {
 739                 .voff   = FFB_SFB64_VOFF,
 740                 .poff   = FFB_SFB64_POFF,
 741                 .size   = 0x2000000
 742         },
 743         {
 744                 .voff   = FFB_FBC_REGS_VOFF,
 745                 .poff   = FFB_FBC_REGS_POFF,
 746                 .size   = 0x0002000
 747         },
 748         {
 749                 .voff   = FFB_BM_FBC_REGS_VOFF,
 750                 .poff   = FFB_BM_FBC_REGS_POFF,
 751                 .size   = 0x0002000
 752         },
 753         {
 754                 .voff   = FFB_DFB8R_VOFF,
 755                 .poff   = FFB_DFB8R_POFF,
 756                 .size   = 0x0400000
 757         },
 758         {
 759                 .voff   = FFB_DFB8G_VOFF,
 760                 .poff   = FFB_DFB8G_POFF,
 761                 .size   = 0x0400000
 762         },
 763         {
 764                 .voff   = FFB_DFB8B_VOFF,
 765                 .poff   = FFB_DFB8B_POFF,
 766                 .size   = 0x0400000
 767         },
 768         {
 769                 .voff   = FFB_DFB8X_VOFF,
 770                 .poff   = FFB_DFB8X_POFF,
 771                 .size   = 0x0400000
 772         },
 773         {
 774                 .voff   = FFB_DFB24_VOFF,
 775                 .poff   = FFB_DFB24_POFF,
 776                 .size   = 0x1000000
 777         },
 778         {
 779                 .voff   = FFB_DFB32_VOFF,
 780                 .poff   = FFB_DFB32_POFF,
 781                 .size   = 0x1000000
 782         },
 783         {
 784                 .voff   = FFB_FBC_KREGS_VOFF,
 785                 .poff   = FFB_FBC_KREGS_POFF,
 786                 .size   = 0x0002000
 787         },
 788         {
 789                 .voff   = FFB_DAC_VOFF,
 790                 .poff   = FFB_DAC_POFF,
 791                 .size   = 0x0002000
 792         },
 793         {
 794                 .voff   = FFB_PROM_VOFF,
 795                 .poff   = FFB_PROM_POFF,
 796                 .size   = 0x0010000
 797         },
 798         {
 799                 .voff   = FFB_EXP_VOFF,
 800                 .poff   = FFB_EXP_POFF,
 801                 .size   = 0x0002000
 802         },
 803         {
 804                 .voff   = FFB_DFB422A_VOFF,
 805                 .poff   = FFB_DFB422A_POFF,
 806                 .size   = 0x0800000
 807         },
 808         {
 809                 .voff   = FFB_DFB422AD_VOFF,
 810                 .poff   = FFB_DFB422AD_POFF,
 811                 .size   = 0x0800000
 812         },
 813         {
 814                 .voff   = FFB_DFB24B_VOFF,
 815                 .poff   = FFB_DFB24B_POFF,
 816                 .size   = 0x1000000
 817         },
 818         {
 819                 .voff   = FFB_DFB422B_VOFF,
 820                 .poff   = FFB_DFB422B_POFF,
 821                 .size   = 0x0800000
 822         },
 823         {
 824                 .voff   = FFB_DFB422BD_VOFF,
 825                 .poff   = FFB_DFB422BD_POFF,
 826                 .size   = 0x0800000
 827         },
 828         {
 829                 .voff   = FFB_SFB16Z_VOFF,
 830                 .poff   = FFB_SFB16Z_POFF,
 831                 .size   = 0x0800000
 832         },
 833         {
 834                 .voff   = FFB_SFB8Z_VOFF,
 835                 .poff   = FFB_SFB8Z_POFF,
 836                 .size   = 0x0800000
 837         },
 838         {
 839                 .voff   = FFB_SFB422_VOFF,
 840                 .poff   = FFB_SFB422_POFF,
 841                 .size   = 0x0800000
 842         },
 843         {
 844                 .voff   = FFB_SFB422D_VOFF,
 845                 .poff   = FFB_SFB422D_POFF,
 846                 .size   = 0x0800000
 847         },
 848         { .size = 0 }
 849 };
 850
 851 static int ffb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 852 {
 853         struct ffb_par *par = (struct ffb_par *)info->par;
 854
 855         return sbusfb_mmap_helper(ffb_mmap_map,
 856                                   par->physbase, par->fbsize,
 857                                   0, vma);
 858 }
 859
 860 static int ffb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 861 {
 862         struct ffb_par *par = (struct ffb_par *)info->par;
 863
 864         return sbusfb_ioctl_helper(cmd, arg, info,
 865                                    FBTYPE_CREATOR, 24, par->fbsize);
 866 }
 867
 868 /*
 869  *  Initialisation
 870  */
 871
 872 static void ffb_init_fix(struct fb_info *info)
 873 {
 874         struct ffb_par *par = (struct ffb_par *)info->par;
 875         const char *ffb_type_name;
 876
 877         if (!(par->flags & FFB_FLAG_AFB)) {
 878                 if ((par->board_type & 0x7) == 0x3)
 879                         ffb_type_name = "Creator 3D";
 880                 else
 881                         ffb_type_name = "Creator";
 882         } else
 883                 ffb_type_name = "Elite 3D";
 884
 885         strlcpy(info->fix.id, ffb_type_name, sizeof(info->fix.id));
 886
 887         info->fix.type = FB_TYPE_PACKED_PIXELS;
 888         info->fix.visual = FB_VISUAL_TRUECOLOR;
 889
 890         /* Framebuffer length is the same regardless of resolution. */
 891         info->fix.line_length = 8192;
 892
 893         info->fix.accel = FB_ACCEL_SUN_CREATOR;
 894 }
 895
 896 static int ffb_probe(struct platform_device *op)
 897 {
 898         struct device_node *dp = op->dev.of_node;
 899         struct ffb_fbc __iomem *fbc;
 900         struct ffb_dac __iomem *dac;
 901         struct fb_info *info;
 902         struct ffb_par *par;
 903         u32 dac_pnum, dac_rev, dac_mrev;
 904         int err;
 905
 906         info = framebuffer_alloc(sizeof(struct ffb_par), &op->dev);
 907
 908         err = -ENOMEM;
 909         if (!info)
 910                 goto out_err;
 911
 912         par = info->par;
 913
 914         spin_lock_init(&par->lock);
 915         par->fbc = of_ioremap(&op->resource[2], 0,
 916                               sizeof(struct ffb_fbc), "ffb fbc");
 917         if (!par->fbc)
 918                 goto out_release_fb;
 919
 920         par->dac = of_ioremap(&op->resource[1], 0,
 921                               sizeof(struct ffb_dac), "ffb dac");
 922         if (!par->dac)
 923                 goto out_unmap_fbc;
 924
 925         par->rop_cache = FFB_ROP_NEW;
 926         par->physbase = op->resource[0].start;
 927
 928         /* Don't mention copyarea, so SCROLL_REDRAW is always
 929          * used.  It is the fastest on this chip.
 930          */
 931         info->flags = (FBINFO_DEFAULT |
 932                        /* FBINFO_HWACCEL_COPYAREA | */
 933                        FBINFO_HWACCEL_FILLRECT |
 934                        FBINFO_HWACCEL_IMAGEBLIT);
 935
 936         info->fbops = &ffb_ops;
 937
 938         info->screen_base = (char *) par->physbase + FFB_DFB24_POFF;
 939         info->pseudo_palette = par->pseudo_palette;
 940
 941         sbusfb_fill_var(&info->var, dp, 32);
 942         par->fbsize = PAGE_ALIGN(info->var.xres * info->var.yres * 4);
 943         ffb_fixup_var_rgb(&info->var);
 944
 945         info->var.accel_flags = FB_ACCELF_TEXT;
 946
 947         if (!strcmp(dp->name, "SUNW,afb"))
 948                 par->flags |= FFB_FLAG_AFB;
 949
 950         par->board_type = of_getintprop_default(dp, "board_type", 0);
 951
 952         fbc = par->fbc;
 953         if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0)
 954                 upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);
 955
 956         dac = par->dac;
 957         upa_writel(FFB_DAC_DID, &dac->type);
 958         dac_pnum = upa_readl(&dac->value);
 959         dac_rev = (dac_pnum & FFB_DAC_DID_REV) >> FFB_DAC_DID_REV_SHIFT;
 960         dac_pnum = (dac_pnum & FFB_DAC_DID_PNUM) >> FFB_DAC_DID_PNUM_SHIFT;
 961
 962         upa_writel(FFB_DAC_UCTRL, &dac->type);
 963         dac_mrev = upa_readl(&dac->value);
 964         dac_mrev = (dac_mrev & FFB_DAC_UCTRL_MANREV) >>
 965                 FFB_DAC_UCTRL_MANREV_SHIFT;
 966
 967         /* Elite3D has different DAC revision numbering, and no DAC revisions
 968          * have the reversed meaning of cursor enable.  Otherwise, Pacifica 1
 969          * ramdacs with manufacturing revision less than 3 have inverted
 970          * cursor logic.  We identify Pacifica 1 as not Pacifica 2, the
 971          * latter having a part number value of 0x236e.
 972          */
 973         if ((par->flags & FFB_FLAG_AFB) || dac_pnum == 0x236e) {
 974                 par->flags &= ~FFB_FLAG_INVCURSOR;
 975         } else {
 976                 if (dac_mrev < 3)
 977                         par->flags |= FFB_FLAG_INVCURSOR;
 978         }
 979
 980         ffb_switch_from_graph(par);
 981
 982         /* Unblank it just to be sure.  When there are multiple
 983          * FFB/AFB cards in the system, or it is not the OBP
 984          * chosen console, it will have video outputs off in
 985          * the DAC.
 986          */
 987         ffb_blank(FB_BLANK_UNBLANK, info);
 988
 989         if (fb_alloc_cmap(&info->cmap, 256, 0))
 990                 goto out_unmap_dac;
 991
 992         ffb_init_fix(info);
 993
 994         err = register_framebuffer(info);
 995         if (err < 0)
 996                 goto out_dealloc_cmap;
 997
 998         dev_set_drvdata(&op->dev, info);
 999
1000         printk(KERN_INFO "%s: %s at %016lx, type %d, "
1001                "DAC pnum[%x] rev[%d] manuf_rev[%d]\n",
1002                dp->full_name,
1003                ((par->flags & FFB_FLAG_AFB) ? "AFB" : "FFB"),
1004                par->physbase, par->board_type,
1005                dac_pnum, dac_rev, dac_mrev);
1006
1007         return 0;
1008
1009 out_dealloc_cmap:
1010         fb_dealloc_cmap(&info->cmap);
1011
1012 out_unmap_dac:
1013         of_iounmap(&op->resource[1], par->dac, sizeof(struct ffb_dac));
1014
1015 out_unmap_fbc:
1016         of_iounmap(&op->resource[2], par->fbc, sizeof(struct ffb_fbc));
1017
1018 out_release_fb:
1019         framebuffer_release(info);
1020
1021 out_err:
1022         return err;
1023 }
1024
1025 static int ffb_remove(struct platform_device *op)
1026 {
1027         struct fb_info *info = dev_get_drvdata(&op->dev);
1028         struct ffb_par *par = info->par;
1029
1030         unregister_framebuffer(info);
1031         fb_dealloc_cmap(&info->cmap);
1032
1033         of_iounmap(&op->resource[2], par->fbc, sizeof(struct ffb_fbc));
1034         of_iounmap(&op->resource[1], par->dac, sizeof(struct ffb_dac));
1035
1036         framebuffer_release(info);
1037
1038         return 0;
1039 }
1040
1041 static const struct of_device_id ffb_match[] = {
1042         {
1043                 .name = "SUNW,ffb",
1044         },
1045         {
1046                 .name = "SUNW,afb",
1047         },
1048         {},
1049 };
1050 MODULE_DEVICE_TABLE(of, ffb_match);
1051
1052 static struct platform_driver ffb_driver = {
1053         .driver = {
1054                 .name = "ffb",
1055                 .of_match_table = ffb_match,
1056         },
1057         .probe          = ffb_probe,
1058         .remove         = ffb_remove,
1059 };
1060
1061 static int __init ffb_init(void)
1062 {
1063         if (fb_get_options("ffb", NULL))
1064                 return -ENODEV;
1065
1066         return platform_driver_register(&ffb_driver);
1067 }
1068
1069 static void __exit ffb_exit(void)
1070 {
1071         platform_driver_unregister(&ffb_driver);
1072 }
1073
1074 module_init(ffb_init);
1075 module_exit(ffb_exit);
1076
1077 MODULE_DESCRIPTION("framebuffer driver for Creator/Elite3D chipsets");
1078 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
1079 MODULE_VERSION("2.0");
1080 MODULE_LICENSE("GPL");