drivers/video/cg6.c

   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/delay.h>
  16 #include <linux/init.h>
  17 #include <linux/fb.h>
  18 #include <linux/mm.h>
  19 #include <linux/of_device.h>
  20
  21 #include <asm/io.h>
  22 #include <asm/fbio.h>
  23
  24 #include "sbuslib.h"
  25
  26 /*
  27  * Local functions.
  28  */
  29
  30 static int cg6_setcolreg(unsigned, unsigned, unsigned, unsigned,
  31                          unsigned, struct fb_info *);
  32 static int cg6_blank(int, struct fb_info *);
  33
  34 static void cg6_imageblit(struct fb_info *, const struct fb_image *);
  35 static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
  36 static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
  37 static int cg6_sync(struct fb_info *);
  38 static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
  39 static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
  40 static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
  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_pan_display         = cg6_pan_display,
  51         .fb_fillrect            = cg6_fillrect,
  52         .fb_copyarea            = cg6_copyarea,
  53         .fb_imageblit           = cg6_imageblit,
  54         .fb_sync                = cg6_sync,
  55         .fb_mmap                = cg6_mmap,
  56         .fb_ioctl               = cg6_ioctl,
  57 #ifdef CONFIG_COMPAT
  58         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  59 #endif
  60 };
  61
  62 /* Offset of interesting structures in the OBIO space */
  63 /*
  64  * Brooktree is the video dac and is funny to program on the cg6.
  65  * (it's even funnier on the cg3)
  66  * The FBC could be the frame buffer control
  67  * The FHC could is the frame buffer hardware control.
  68  */
  69 #define CG6_ROM_OFFSET                  0x0UL
  70 #define CG6_BROOKTREE_OFFSET            0x200000UL
  71 #define CG6_DHC_OFFSET                  0x240000UL
  72 #define CG6_ALT_OFFSET                  0x280000UL
  73 #define CG6_FHC_OFFSET                  0x300000UL
  74 #define CG6_THC_OFFSET                  0x301000UL
  75 #define CG6_FBC_OFFSET                  0x700000UL
  76 #define CG6_TEC_OFFSET                  0x701000UL
  77 #define CG6_RAM_OFFSET                  0x800000UL
  78
  79 /* FHC definitions */
  80 #define CG6_FHC_FBID_SHIFT              24
  81 #define CG6_FHC_FBID_MASK               255
  82 #define CG6_FHC_REV_SHIFT               20
  83 #define CG6_FHC_REV_MASK                15
  84 #define CG6_FHC_FROP_DISABLE            (1 << 19)
  85 #define CG6_FHC_ROW_DISABLE             (1 << 18)
  86 #define CG6_FHC_SRC_DISABLE             (1 << 17)
  87 #define CG6_FHC_DST_DISABLE             (1 << 16)
  88 #define CG6_FHC_RESET                   (1 << 15)
  89 #define CG6_FHC_LITTLE_ENDIAN           (1 << 13)
  90 #define CG6_FHC_RES_MASK                (3 << 11)
  91 #define CG6_FHC_1024                    (0 << 11)
  92 #define CG6_FHC_1152                    (1 << 11)
  93 #define CG6_FHC_1280                    (2 << 11)
  94 #define CG6_FHC_1600                    (3 << 11)
  95 #define CG6_FHC_CPU_MASK                (3 << 9)
  96 #define CG6_FHC_CPU_SPARC               (0 << 9)
  97 #define CG6_FHC_CPU_68020               (1 << 9)
  98 #define CG6_FHC_CPU_386                 (2 << 9)
  99 #define CG6_FHC_TEST                    (1 << 8)
 100 #define CG6_FHC_TEST_X_SHIFT            4
 101 #define CG6_FHC_TEST_X_MASK             15
 102 #define CG6_FHC_TEST_Y_SHIFT            0
 103 #define CG6_FHC_TEST_Y_MASK             15
 104
 105 /* FBC mode definitions */
 106 #define CG6_FBC_BLIT_IGNORE             0x00000000
 107 #define CG6_FBC_BLIT_NOSRC              0x00100000
 108 #define CG6_FBC_BLIT_SRC                0x00200000
 109 #define CG6_FBC_BLIT_ILLEGAL            0x00300000
 110 #define CG6_FBC_BLIT_MASK               0x00300000
 111
 112 #define CG6_FBC_VBLANK                  0x00080000
 113
 114 #define CG6_FBC_MODE_IGNORE             0x00000000
 115 #define CG6_FBC_MODE_COLOR8             0x00020000
 116 #define CG6_FBC_MODE_COLOR1             0x00040000
 117 #define CG6_FBC_MODE_HRMONO             0x00060000
 118 #define CG6_FBC_MODE_MASK               0x00060000
 119
 120 #define CG6_FBC_DRAW_IGNORE             0x00000000
 121 #define CG6_FBC_DRAW_RENDER             0x00008000
 122 #define CG6_FBC_DRAW_PICK               0x00010000
 123 #define CG6_FBC_DRAW_ILLEGAL            0x00018000
 124 #define CG6_FBC_DRAW_MASK               0x00018000
 125
 126 #define CG6_FBC_BWRITE0_IGNORE          0x00000000
 127 #define CG6_FBC_BWRITE0_ENABLE          0x00002000
 128 #define CG6_FBC_BWRITE0_DISABLE         0x00004000
 129 #define CG6_FBC_BWRITE0_ILLEGAL         0x00006000
 130 #define CG6_FBC_BWRITE0_MASK            0x00006000
 131
 132 #define CG6_FBC_BWRITE1_IGNORE          0x00000000
 133 #define CG6_FBC_BWRITE1_ENABLE          0x00000800
 134 #define CG6_FBC_BWRITE1_DISABLE         0x00001000
 135 #define CG6_FBC_BWRITE1_ILLEGAL         0x00001800
 136 #define CG6_FBC_BWRITE1_MASK            0x00001800
 137
 138 #define CG6_FBC_BREAD_IGNORE            0x00000000
 139 #define CG6_FBC_BREAD_0                 0x00000200
 140 #define CG6_FBC_BREAD_1                 0x00000400
 141 #define CG6_FBC_BREAD_ILLEGAL           0x00000600
 142 #define CG6_FBC_BREAD_MASK              0x00000600
 143
 144 #define CG6_FBC_BDISP_IGNORE            0x00000000
 145 #define CG6_FBC_BDISP_0                 0x00000080
 146 #define CG6_FBC_BDISP_1                 0x00000100
 147 #define CG6_FBC_BDISP_ILLEGAL           0x00000180
 148 #define CG6_FBC_BDISP_MASK              0x00000180
 149
 150 #define CG6_FBC_INDEX_MOD               0x00000040
 151 #define CG6_FBC_INDEX_MASK              0x00000030
 152
 153 /* THC definitions */
 154 #define CG6_THC_MISC_REV_SHIFT          16
 155 #define CG6_THC_MISC_REV_MASK           15
 156 #define CG6_THC_MISC_RESET              (1 << 12)
 157 #define CG6_THC_MISC_VIDEO              (1 << 10)
 158 #define CG6_THC_MISC_SYNC               (1 << 9)
 159 #define CG6_THC_MISC_VSYNC              (1 << 8)
 160 #define CG6_THC_MISC_SYNC_ENAB          (1 << 7)
 161 #define CG6_THC_MISC_CURS_RES           (1 << 6)
 162 #define CG6_THC_MISC_INT_ENAB           (1 << 5)
 163 #define CG6_THC_MISC_INT                (1 << 4)
 164 #define CG6_THC_MISC_INIT               0x9f
 165 #define CG6_THC_CURSOFF                 ((65536-32) | ((65536-32) << 16))
 166
 167 /* The contents are unknown */
 168 struct cg6_tec {
 169         int tec_matrix;
 170         int tec_clip;
 171         int tec_vdc;
 172 };
 173
 174 struct cg6_thc {
 175         u32     thc_pad0[512];
 176         u32     thc_hs;         /* hsync timing */
 177         u32     thc_hsdvs;
 178         u32     thc_hd;
 179         u32     thc_vs;         /* vsync timing */
 180         u32     thc_vd;
 181         u32     thc_refresh;
 182         u32     thc_misc;
 183         u32     thc_pad1[56];
 184         u32     thc_cursxy;     /* cursor x,y position (16 bits each) */
 185         u32     thc_cursmask[32];       /* cursor mask bits */
 186         u32     thc_cursbits[32];       /* what to show where mask enabled */
 187 };
 188
 189 struct cg6_fbc {
 190         u32     xxx0[1];
 191         u32     mode;
 192         u32     clip;
 193         u32     xxx1[1];
 194         u32     s;
 195         u32     draw;
 196         u32     blit;
 197         u32     font;
 198         u32     xxx2[24];
 199         u32     x0, y0, z0, color0;
 200         u32     x1, y1, z1, color1;
 201         u32     x2, y2, z2, color2;
 202         u32     x3, y3, z3, color3;
 203         u32     offx, offy;
 204         u32     xxx3[2];
 205         u32     incx, incy;
 206         u32     xxx4[2];
 207         u32     clipminx, clipminy;
 208         u32     xxx5[2];
 209         u32     clipmaxx, clipmaxy;
 210         u32     xxx6[2];
 211         u32     fg;
 212         u32     bg;
 213         u32     alu;
 214         u32     pm;
 215         u32     pixelm;
 216         u32     xxx7[2];
 217         u32     patalign;
 218         u32     pattern[8];
 219         u32     xxx8[432];
 220         u32     apointx, apointy, apointz;
 221         u32     xxx9[1];
 222         u32     rpointx, rpointy, rpointz;
 223         u32     xxx10[5];
 224         u32     pointr, pointg, pointb, pointa;
 225         u32     alinex, aliney, alinez;
 226         u32     xxx11[1];
 227         u32     rlinex, rliney, rlinez;
 228         u32     xxx12[5];
 229         u32     liner, lineg, lineb, linea;
 230         u32     atrix, atriy, atriz;
 231         u32     xxx13[1];
 232         u32     rtrix, rtriy, rtriz;
 233         u32     xxx14[5];
 234         u32     trir, trig, trib, tria;
 235         u32     aquadx, aquady, aquadz;
 236         u32     xxx15[1];
 237         u32     rquadx, rquady, rquadz;
 238         u32     xxx16[5];
 239         u32     quadr, quadg, quadb, quada;
 240         u32     arectx, arecty, arectz;
 241         u32     xxx17[1];
 242         u32     rrectx, rrecty, rrectz;
 243         u32     xxx18[5];
 244         u32     rectr, rectg, rectb, recta;
 245 };
 246
 247 struct bt_regs {
 248         u32     addr;
 249         u32     color_map;
 250         u32     control;
 251         u32     cursor;
 252 };
 253
 254 struct cg6_par {
 255         spinlock_t              lock;
 256         struct bt_regs          __iomem *bt;
 257         struct cg6_fbc          __iomem *fbc;
 258         struct cg6_thc          __iomem *thc;
 259         struct cg6_tec          __iomem *tec;
 260         u32                     __iomem *fhc;
 261
 262         u32                     flags;
 263 #define CG6_FLAG_BLANKED        0x00000001
 264
 265         unsigned long           which_io;
 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 static void cg6_switch_from_graph(struct cg6_par *par)
 284 {
 285         struct cg6_thc __iomem *thc = par->thc;
 286         unsigned long flags;
 287
 288         spin_lock_irqsave(&par->lock, flags);
 289
 290         /* Hide the cursor. */
 291         sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
 292
 293         spin_unlock_irqrestore(&par->lock, flags);
 294 }
 295
 296 static int cg6_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 297 {
 298         struct cg6_par *par = (struct cg6_par *)info->par;
 299
 300         /* We just use this to catch switches out of
 301          * graphics mode.
 302          */
 303         cg6_switch_from_graph(par);
 304
 305         if (var->xoffset || var->yoffset || var->vmode)
 306                 return -EINVAL;
 307         return 0;
 308 }
 309
 310 /**
 311  *      cg6_fillrect -  Draws a rectangle on the screen.
 312  *
 313  *      @info: frame buffer structure that represents a single frame buffer
 314  *      @rect: structure defining the rectagle and operation.
 315  */
 316 static void cg6_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 317 {
 318         struct cg6_par *par = (struct cg6_par *)info->par;
 319         struct cg6_fbc __iomem *fbc = par->fbc;
 320         unsigned long flags;
 321         s32 val;
 322
 323         /* CG6 doesn't handle ROP_XOR */
 324
 325         spin_lock_irqsave(&par->lock, flags);
 326
 327         cg6_sync(info);
 328
 329         sbus_writel(rect->color, &fbc->fg);
 330         sbus_writel(~(u32)0, &fbc->pixelm);
 331         sbus_writel(0xea80ff00, &fbc->alu);
 332         sbus_writel(0, &fbc->s);
 333         sbus_writel(0, &fbc->clip);
 334         sbus_writel(~(u32)0, &fbc->pm);
 335         sbus_writel(rect->dy, &fbc->arecty);
 336         sbus_writel(rect->dx, &fbc->arectx);
 337         sbus_writel(rect->dy + rect->height, &fbc->arecty);
 338         sbus_writel(rect->dx + rect->width, &fbc->arectx);
 339         do {
 340                 val = sbus_readl(&fbc->draw);
 341         } while (val < 0 && (val & 0x20000000));
 342         spin_unlock_irqrestore(&par->lock, flags);
 343 }
 344
 345 /**
 346  *      cg6_copyarea - Copies one area of the screen to another area.
 347  *
 348  *      @info: frame buffer structure that represents a single frame buffer
 349  *      @area: Structure providing the data to copy the framebuffer contents
 350  *              from one region to another.
 351  *
 352  *      This drawing operation copies a rectangular area from one area of the
 353  *      screen to another area.
 354  */
 355 static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 356 {
 357         struct cg6_par *par = (struct cg6_par *)info->par;
 358         struct cg6_fbc __iomem *fbc = par->fbc;
 359         unsigned long flags;
 360         int i;
 361
 362         spin_lock_irqsave(&par->lock, flags);
 363
 364         cg6_sync(info);
 365
 366         sbus_writel(0xff, &fbc->fg);
 367         sbus_writel(0x00, &fbc->bg);
 368         sbus_writel(~0, &fbc->pixelm);
 369         sbus_writel(0xe880cccc, &fbc->alu);
 370         sbus_writel(0, &fbc->s);
 371         sbus_writel(0, &fbc->clip);
 372
 373         sbus_writel(area->sy, &fbc->y0);
 374         sbus_writel(area->sx, &fbc->x0);
 375         sbus_writel(area->sy + area->height - 1, &fbc->y1);
 376         sbus_writel(area->sx + area->width - 1, &fbc->x1);
 377         sbus_writel(area->dy, &fbc->y2);
 378         sbus_writel(area->dx, &fbc->x2);
 379         sbus_writel(area->dy + area->height - 1, &fbc->y3);
 380         sbus_writel(area->dx + area->width - 1, &fbc->x3);
 381         do {
 382                 i = sbus_readl(&fbc->blit);
 383         } while (i < 0 && (i & 0x20000000));
 384         spin_unlock_irqrestore(&par->lock, flags);
 385 }
 386
 387 /**
 388  *      cg6_imageblit - Copies a image from system memory to the screen.
 389  *
 390  *      @info: frame buffer structure that represents a single frame buffer
 391  *      @image: structure defining the image.
 392  */
 393 static void cg6_imageblit(struct fb_info *info, const struct fb_image *image)
 394 {
 395         struct cg6_par *par = (struct cg6_par *)info->par;
 396         struct cg6_fbc __iomem *fbc = par->fbc;
 397         const u8 *data = image->data;
 398         unsigned long flags;
 399         u32 x, y;
 400         int i, width;
 401
 402         if (image->depth > 1) {
 403                 cfb_imageblit(info, image);
 404                 return;
 405         }
 406
 407         spin_lock_irqsave(&par->lock, flags);
 408
 409         cg6_sync(info);
 410
 411         sbus_writel(image->fg_color, &fbc->fg);
 412         sbus_writel(image->bg_color, &fbc->bg);
 413         sbus_writel(0x140000, &fbc->mode);
 414         sbus_writel(0xe880fc30, &fbc->alu);
 415         sbus_writel(~(u32)0, &fbc->pixelm);
 416         sbus_writel(0, &fbc->s);
 417         sbus_writel(0, &fbc->clip);
 418         sbus_writel(0xff, &fbc->pm);
 419         sbus_writel(32, &fbc->incx);
 420         sbus_writel(0, &fbc->incy);
 421
 422         x = image->dx;
 423         y = image->dy;
 424         for (i = 0; i < image->height; i++) {
 425                 width = image->width;
 426
 427                 while (width >= 32) {
 428                         u32 val;
 429
 430                         sbus_writel(y, &fbc->y0);
 431                         sbus_writel(x, &fbc->x0);
 432                         sbus_writel(x + 32 - 1, &fbc->x1);
 433
 434                         val = ((u32)data[0] << 24) |
 435                               ((u32)data[1] << 16) |
 436                               ((u32)data[2] <<  8) |
 437                               ((u32)data[3] <<  0);
 438                         sbus_writel(val, &fbc->font);
 439
 440                         data += 4;
 441                         x += 32;
 442                         width -= 32;
 443                 }
 444                 if (width) {
 445                         u32 val;
 446
 447                         sbus_writel(y, &fbc->y0);
 448                         sbus_writel(x, &fbc->x0);
 449                         sbus_writel(x + width - 1, &fbc->x1);
 450                         if (width <= 8) {
 451                                 val = (u32) data[0] << 24;
 452                                 data += 1;
 453                         } else if (width <= 16) {
 454                                 val = ((u32) data[0] << 24) |
 455                                       ((u32) data[1] << 16);
 456                                 data += 2;
 457                         } else {
 458                                 val = ((u32) data[0] << 24) |
 459                                       ((u32) data[1] << 16) |
 460                                       ((u32) data[2] <<  8);
 461                                 data += 3;
 462                         }
 463                         sbus_writel(val, &fbc->font);
 464                 }
 465
 466                 y += 1;
 467                 x = image->dx;
 468         }
 469
 470         spin_unlock_irqrestore(&par->lock, flags);
 471 }
 472
 473 /**
 474  *      cg6_setcolreg - Sets a color register.
 475  *
 476  *      @regno: boolean, 0 copy local, 1 get_user() function
 477  *      @red: frame buffer colormap structure
 478  *      @green: The green value which can be up to 16 bits wide
 479  *      @blue:  The blue value which can be up to 16 bits wide.
 480  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 481  *      @info: frame buffer info structure
 482  */
 483 static int cg6_setcolreg(unsigned regno,
 484                          unsigned red, unsigned green, unsigned blue,
 485                          unsigned transp, struct fb_info *info)
 486 {
 487         struct cg6_par *par = (struct cg6_par *)info->par;
 488         struct bt_regs __iomem *bt = par->bt;
 489         unsigned long flags;
 490
 491         if (regno >= 256)
 492                 return 1;
 493
 494         red >>= 8;
 495         green >>= 8;
 496         blue >>= 8;
 497
 498         spin_lock_irqsave(&par->lock, flags);
 499
 500         sbus_writel((u32)regno << 24, &bt->addr);
 501         sbus_writel((u32)red << 24, &bt->color_map);
 502         sbus_writel((u32)green << 24, &bt->color_map);
 503         sbus_writel((u32)blue << 24, &bt->color_map);
 504
 505         spin_unlock_irqrestore(&par->lock, flags);
 506
 507         return 0;
 508 }
 509
 510 /**
 511  *      cg6_blank - Blanks the display.
 512  *
 513  *      @blank_mode: the blank mode we want.
 514  *      @info: frame buffer structure that represents a single frame buffer
 515  */
 516 static int cg6_blank(int blank, struct fb_info *info)
 517 {
 518         struct cg6_par *par = (struct cg6_par *)info->par;
 519         struct cg6_thc __iomem *thc = par->thc;
 520         unsigned long flags;
 521         u32 val;
 522
 523         spin_lock_irqsave(&par->lock, flags);
 524         val = sbus_readl(&thc->thc_misc);
 525
 526         switch (blank) {
 527         case FB_BLANK_UNBLANK: /* Unblanking */
 528                 val |= CG6_THC_MISC_VIDEO;
 529                 par->flags &= ~CG6_FLAG_BLANKED;
 530                 break;
 531
 532         case FB_BLANK_NORMAL: /* Normal blanking */
 533         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 534         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 535         case FB_BLANK_POWERDOWN: /* Poweroff */
 536                 val &= ~CG6_THC_MISC_VIDEO;
 537                 par->flags |= CG6_FLAG_BLANKED;
 538                 break;
 539         }
 540
 541         sbus_writel(val, &thc->thc_misc);
 542         spin_unlock_irqrestore(&par->lock, flags);
 543
 544         return 0;
 545 }
 546
 547 static struct sbus_mmap_map cg6_mmap_map[] = {
 548         {
 549                 .voff   = CG6_FBC,
 550                 .poff   = CG6_FBC_OFFSET,
 551                 .size   = PAGE_SIZE
 552         },
 553         {
 554                 .voff   = CG6_TEC,
 555                 .poff   = CG6_TEC_OFFSET,
 556                 .size   = PAGE_SIZE
 557         },
 558         {
 559                 .voff   = CG6_BTREGS,
 560                 .poff   = CG6_BROOKTREE_OFFSET,
 561                 .size   = PAGE_SIZE
 562         },
 563         {
 564                 .voff   = CG6_FHC,
 565                 .poff   = CG6_FHC_OFFSET,
 566                 .size   = PAGE_SIZE
 567         },
 568         {
 569                 .voff   = CG6_THC,
 570                 .poff   = CG6_THC_OFFSET,
 571                 .size   = PAGE_SIZE
 572         },
 573         {
 574                 .voff   = CG6_ROM,
 575                 .poff   = CG6_ROM_OFFSET,
 576                 .size   = 0x10000
 577         },
 578         {
 579                 .voff   = CG6_RAM,
 580                 .poff   = CG6_RAM_OFFSET,
 581                 .size   = SBUS_MMAP_FBSIZE(1)
 582         },
 583         {
 584                 .voff   = CG6_DHC,
 585                 .poff   = CG6_DHC_OFFSET,
 586                 .size   = 0x40000
 587         },
 588         { .size = 0 }
 589 };
 590
 591 static int cg6_mmap(struct fb_info *info, struct vm_area_struct *vma)
 592 {
 593         struct cg6_par *par = (struct cg6_par *)info->par;
 594
 595         return sbusfb_mmap_helper(cg6_mmap_map,
 596                                   info->fix.smem_start, info->fix.smem_len,
 597                                   par->which_io, vma);
 598 }
 599
 600 static int cg6_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 601 {
 602         return sbusfb_ioctl_helper(cmd, arg, info,
 603                                    FBTYPE_SUNFAST_COLOR, 8, info->fix.smem_len);
 604 }
 605
 606 /*
 607  *  Initialisation
 608  */
 609
 610 static void __devinit cg6_init_fix(struct fb_info *info, int linebytes)
 611 {
 612         struct cg6_par *par = (struct cg6_par *)info->par;
 613         const char *cg6_cpu_name, *cg6_card_name;
 614         u32 conf;
 615
 616         conf = sbus_readl(par->fhc);
 617         switch (conf & CG6_FHC_CPU_MASK) {
 618         case CG6_FHC_CPU_SPARC:
 619                 cg6_cpu_name = "sparc";
 620                 break;
 621         case CG6_FHC_CPU_68020:
 622                 cg6_cpu_name = "68020";
 623                 break;
 624         default:
 625                 cg6_cpu_name = "i386";
 626                 break;
 627         };
 628         if (((conf >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK) >= 11) {
 629                 if (info->fix.smem_len <= 0x100000)
 630                         cg6_card_name = "TGX";
 631                 else
 632                         cg6_card_name = "TGX+";
 633         } else {
 634                 if (info->fix.smem_len <= 0x100000)
 635                         cg6_card_name = "GX";
 636                 else
 637                         cg6_card_name = "GX+";
 638         }
 639
 640         sprintf(info->fix.id, "%s %s", cg6_card_name, cg6_cpu_name);
 641         info->fix.id[sizeof(info->fix.id) - 1] = 0;
 642
 643         info->fix.type = FB_TYPE_PACKED_PIXELS;
 644         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 645
 646         info->fix.line_length = linebytes;
 647
 648         info->fix.accel = FB_ACCEL_SUN_CGSIX;
 649 }
 650
 651 /* Initialize Brooktree DAC */
 652 static void __devinit cg6_bt_init(struct cg6_par *par)
 653 {
 654         struct bt_regs __iomem *bt = par->bt;
 655
 656         sbus_writel(0x04 << 24, &bt->addr);      /* color planes */
 657         sbus_writel(0xff << 24, &bt->control);
 658         sbus_writel(0x05 << 24, &bt->addr);
 659         sbus_writel(0x00 << 24, &bt->control);
 660         sbus_writel(0x06 << 24, &bt->addr);      /* overlay plane */
 661         sbus_writel(0x73 << 24, &bt->control);
 662         sbus_writel(0x07 << 24, &bt->addr);
 663         sbus_writel(0x00 << 24, &bt->control);
 664 }
 665
 666 static void __devinit cg6_chip_init(struct fb_info *info)
 667 {
 668         struct cg6_par *par = (struct cg6_par *)info->par;
 669         struct cg6_tec __iomem *tec = par->tec;
 670         struct cg6_fbc __iomem *fbc = par->fbc;
 671         struct cg6_thc __iomem *thc = par->thc;
 672         u32 rev, conf, mode;
 673         int i;
 674
 675         /* Hide the cursor. */
 676         sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
 677
 678         /* Turn off stuff in the Transform Engine. */
 679         sbus_writel(0, &tec->tec_matrix);
 680         sbus_writel(0, &tec->tec_clip);
 681         sbus_writel(0, &tec->tec_vdc);
 682
 683         /* Take care of bugs in old revisions. */
 684         rev = (sbus_readl(par->fhc) >> CG6_FHC_REV_SHIFT) & CG6_FHC_REV_MASK;
 685         if (rev < 5) {
 686                 conf = (sbus_readl(par->fhc) & CG6_FHC_RES_MASK) |
 687                         CG6_FHC_CPU_68020 | CG6_FHC_TEST |
 688                         (11 << CG6_FHC_TEST_X_SHIFT) |
 689                         (11 << CG6_FHC_TEST_Y_SHIFT);
 690                 if (rev < 2)
 691                         conf |= CG6_FHC_DST_DISABLE;
 692                 sbus_writel(conf, par->fhc);
 693         }
 694
 695         /* Set things in the FBC. Bad things appear to happen if we do
 696          * back to back store/loads on the mode register, so copy it
 697          * out instead. */
 698         mode = sbus_readl(&fbc->mode);
 699         do {
 700                 i = sbus_readl(&fbc->s);
 701         } while (i & 0x10000000);
 702         mode &= ~(CG6_FBC_BLIT_MASK | CG6_FBC_MODE_MASK |
 703                   CG6_FBC_DRAW_MASK | CG6_FBC_BWRITE0_MASK |
 704                   CG6_FBC_BWRITE1_MASK | CG6_FBC_BREAD_MASK |
 705                   CG6_FBC_BDISP_MASK);
 706         mode |= (CG6_FBC_BLIT_SRC | CG6_FBC_MODE_COLOR8 |
 707                  CG6_FBC_DRAW_RENDER | CG6_FBC_BWRITE0_ENABLE |
 708                  CG6_FBC_BWRITE1_DISABLE | CG6_FBC_BREAD_0 |
 709                  CG6_FBC_BDISP_0);
 710         sbus_writel(mode, &fbc->mode);
 711
 712         sbus_writel(0, &fbc->clip);
 713         sbus_writel(0, &fbc->offx);
 714         sbus_writel(0, &fbc->offy);
 715         sbus_writel(0, &fbc->clipminx);
 716         sbus_writel(0, &fbc->clipminy);
 717         sbus_writel(info->var.xres - 1, &fbc->clipmaxx);
 718         sbus_writel(info->var.yres - 1, &fbc->clipmaxy);
 719 }
 720
 721 static void cg6_unmap_regs(struct of_device *op, struct fb_info *info,
 722                            struct cg6_par *par)
 723 {
 724         if (par->fbc)
 725                 of_iounmap(&op->resource[0], par->fbc, 4096);
 726         if (par->tec)
 727                 of_iounmap(&op->resource[0], par->tec, sizeof(struct cg6_tec));
 728         if (par->thc)
 729                 of_iounmap(&op->resource[0], par->thc, sizeof(struct cg6_thc));
 730         if (par->bt)
 731                 of_iounmap(&op->resource[0], par->bt, sizeof(struct bt_regs));
 732         if (par->fhc)
 733                 of_iounmap(&op->resource[0], par->fhc, sizeof(u32));
 734
 735         if (info->screen_base)
 736                 of_iounmap(&op->resource[0], info->screen_base,
 737                            info->fix.smem_len);
 738 }
 739
 740 static int __devinit cg6_probe(struct of_device *op,
 741                                 const struct of_device_id *match)
 742 {
 743         struct device_node *dp = op->dev.of_node;
 744         struct fb_info *info;
 745         struct cg6_par *par;
 746         int linebytes, err;
 747         int dblbuf;
 748
 749         info = framebuffer_alloc(sizeof(struct cg6_par), &op->dev);
 750
 751         err = -ENOMEM;
 752         if (!info)
 753                 goto out_err;
 754         par = info->par;
 755
 756         spin_lock_init(&par->lock);
 757
 758         info->fix.smem_start = op->resource[0].start;
 759         par->which_io = op->resource[0].flags & IORESOURCE_BITS;
 760
 761         sbusfb_fill_var(&info->var, dp, 8);
 762         info->var.red.length = 8;
 763         info->var.green.length = 8;
 764         info->var.blue.length = 8;
 765
 766         linebytes = of_getintprop_default(dp, "linebytes",
 767                                           info->var.xres);
 768         info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
 769
 770         dblbuf = of_getintprop_default(dp, "dblbuf", 0);
 771         if (dblbuf)
 772                 info->fix.smem_len *= 4;
 773
 774         par->fbc = of_ioremap(&op->resource[0], CG6_FBC_OFFSET,
 775                                 4096, "cgsix fbc");
 776         par->tec = of_ioremap(&op->resource[0], CG6_TEC_OFFSET,
 777                                 sizeof(struct cg6_tec), "cgsix tec");
 778         par->thc = of_ioremap(&op->resource[0], CG6_THC_OFFSET,
 779                                 sizeof(struct cg6_thc), "cgsix thc");
 780         par->bt = of_ioremap(&op->resource[0], CG6_BROOKTREE_OFFSET,
 781                                 sizeof(struct bt_regs), "cgsix dac");
 782         par->fhc = of_ioremap(&op->resource[0], CG6_FHC_OFFSET,
 783                                 sizeof(u32), "cgsix fhc");
 784
 785         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_IMAGEBLIT |
 786                         FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
 787                         FBINFO_READS_FAST;
 788         info->fbops = &cg6_ops;
 789
 790         info->screen_base = of_ioremap(&op->resource[0], CG6_RAM_OFFSET,
 791                                         info->fix.smem_len, "cgsix ram");
 792         if (!par->fbc || !par->tec || !par->thc ||
 793             !par->bt || !par->fhc || !info->screen_base)
 794                 goto out_unmap_regs;
 795
 796         info->var.accel_flags = FB_ACCELF_TEXT;
 797
 798         cg6_bt_init(par);
 799         cg6_chip_init(info);
 800         cg6_blank(FB_BLANK_UNBLANK, info);
 801
 802         if (fb_alloc_cmap(&info->cmap, 256, 0))
 803                 goto out_unmap_regs;
 804
 805         fb_set_cmap(&info->cmap, info);
 806         cg6_init_fix(info, linebytes);
 807
 808         err = register_framebuffer(info);
 809         if (err < 0)
 810                 goto out_dealloc_cmap;
 811
 812         dev_set_drvdata(&op->dev, info);
 813
 814         printk(KERN_INFO "%s: CGsix [%s] at %lx:%lx\n",
 815                dp->full_name, info->fix.id,
 816                par->which_io, info->fix.smem_start);
 817
 818         return 0;
 819
 820 out_dealloc_cmap:
 821         fb_dealloc_cmap(&info->cmap);
 822
 823 out_unmap_regs:
 824         cg6_unmap_regs(op, info, par);
 825
 826 out_err:
 827         return err;
 828 }
 829
 830 static int __devexit cg6_remove(struct of_device *op)
 831 {
 832         struct fb_info *info = dev_get_drvdata(&op->dev);
 833         struct cg6_par *par = info->par;
 834
 835         unregister_framebuffer(info);
 836         fb_dealloc_cmap(&info->cmap);
 837
 838         cg6_unmap_regs(op, info, par);
 839
 840         framebuffer_release(info);
 841
 842         dev_set_drvdata(&op->dev, NULL);
 843
 844         return 0;
 845 }
 846
 847 static const struct of_device_id cg6_match[] = {
 848         {
 849                 .name = "cgsix",
 850         },
 851         {
 852                 .name = "cgthree+",
 853         },
 854         {},
 855 };
 856 MODULE_DEVICE_TABLE(of, cg6_match);
 857
 858 static struct of_platform_driver cg6_driver = {
 859         .driver = {
 860                 .name = "cg6",
 861                 .owner = THIS_MODULE,
 862                 .of_match_table = cg6_match,
 863         },
 864         .probe          = cg6_probe,
 865         .remove         = __devexit_p(cg6_remove),
 866 };
 867
 868 static int __init cg6_init(void)
 869 {
 870         if (fb_get_options("cg6fb", NULL))
 871                 return -ENODEV;
 872
 873         return of_register_driver(&cg6_driver, &of_bus_type);
 874 }
 875
 876 static void __exit cg6_exit(void)
 877 {
 878         of_unregister_driver(&cg6_driver);
 879 }
 880
 881 module_init(cg6_init);
 882 module_exit(cg6_exit);
 883
 884 MODULE_DESCRIPTION("framebuffer driver for CGsix chipsets");
 885 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 886 MODULE_VERSION("2.0");
 887 MODULE_LICENSE("GPL");