drivers/video/leo.c

   1 /* leo.c: LEO frame buffer driver
   2  *
   3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1996-1999 Jakub Jelinek (jj@ultra.linux.cz)
   5  * Copyright (C) 1997 Michal Rehacek (Michal.Rehacek@st.mff.cuni.cz)
   6  *
   7  * Driver layout based loosely on tgafb.c, see that file for credits.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/string.h>
  14 #include <linux/slab.h>
  15 #include <linux/delay.h>
  16 #include <linux/init.h>
  17 #include <linux/fb.h>
  18 #include <linux/mm.h>
  19
  20 #include <asm/io.h>
  21 #include <asm/prom.h>
  22 #include <asm/of_device.h>
  23 #include <asm/fbio.h>
  24
  25 #include "sbuslib.h"
  26
  27 /*
  28  * Local functions.
  29  */
  30
  31 static int leo_setcolreg(unsigned, unsigned, unsigned, unsigned,
  32                          unsigned, struct fb_info *);
  33 static int leo_blank(int, struct fb_info *);
  34
  35 static int leo_mmap(struct fb_info *, struct vm_area_struct *);
  36 static int leo_ioctl(struct fb_info *, unsigned int, unsigned long);
  37 static int leo_pan_display(struct fb_var_screeninfo *, struct fb_info *);
  38
  39 /*
  40  *  Frame buffer operations
  41  */
  42
  43 static struct fb_ops leo_ops = {
  44         .owner                  = THIS_MODULE,
  45         .fb_setcolreg           = leo_setcolreg,
  46         .fb_blank               = leo_blank,
  47         .fb_pan_display         = leo_pan_display,
  48         .fb_fillrect            = cfb_fillrect,
  49         .fb_copyarea            = cfb_copyarea,
  50         .fb_imageblit           = cfb_imageblit,
  51         .fb_mmap                = leo_mmap,
  52         .fb_ioctl               = leo_ioctl,
  53 #ifdef CONFIG_COMPAT
  54         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  55 #endif
  56 };
  57
  58 #define LEO_OFF_LC_SS0_KRN      0x00200000UL
  59 #define LEO_OFF_LC_SS0_USR      0x00201000UL
  60 #define LEO_OFF_LC_SS1_KRN      0x01200000UL
  61 #define LEO_OFF_LC_SS1_USR      0x01201000UL
  62 #define LEO_OFF_LD_SS0          0x00400000UL
  63 #define LEO_OFF_LD_SS1          0x01400000UL
  64 #define LEO_OFF_LD_GBL          0x00401000UL
  65 #define LEO_OFF_LX_KRN          0x00600000UL
  66 #define LEO_OFF_LX_CURSOR       0x00601000UL
  67 #define LEO_OFF_SS0             0x00800000UL
  68 #define LEO_OFF_SS1             0x01800000UL
  69 #define LEO_OFF_UNK             0x00602000UL
  70 #define LEO_OFF_UNK2            0x00000000UL
  71
  72 #define LEO_CUR_ENABLE          0x00000080
  73 #define LEO_CUR_UPDATE          0x00000030
  74 #define LEO_CUR_PROGRESS        0x00000006
  75 #define LEO_CUR_UPDATECMAP      0x00000003
  76
  77 #define LEO_CUR_TYPE_MASK       0x00000000
  78 #define LEO_CUR_TYPE_IMAGE      0x00000020
  79 #define LEO_CUR_TYPE_CMAP       0x00000050
  80
  81 struct leo_cursor {
  82         u8              xxx0[16];
  83         u32     cur_type;
  84         u32     cur_misc;
  85         u32     cur_cursxy;
  86         u32     cur_data;
  87 };
  88
  89 #define LEO_KRN_TYPE_CLUT0      0x00001000
  90 #define LEO_KRN_TYPE_CLUT1      0x00001001
  91 #define LEO_KRN_TYPE_CLUT2      0x00001002
  92 #define LEO_KRN_TYPE_WID        0x00001003
  93 #define LEO_KRN_TYPE_UNK        0x00001006
  94 #define LEO_KRN_TYPE_VIDEO      0x00002003
  95 #define LEO_KRN_TYPE_CLUTDATA   0x00004000
  96 #define LEO_KRN_CSR_ENABLE      0x00000008
  97 #define LEO_KRN_CSR_PROGRESS    0x00000004
  98 #define LEO_KRN_CSR_UNK         0x00000002
  99 #define LEO_KRN_CSR_UNK2        0x00000001
 100
 101 struct leo_lx_krn {
 102         u32     krn_type;
 103         u32     krn_csr;
 104         u32     krn_value;
 105 };
 106
 107 struct leo_lc_ss0_krn {
 108         u32     misc;
 109         u8              xxx0[0x800-4];
 110         u32     rev;
 111 };
 112
 113 struct leo_lc_ss0_usr {
 114         u32     csr;
 115         u32     addrspace;
 116         u32     fontmsk;
 117         u32     fontt;
 118         u32     extent;
 119         u32     src;
 120         u32             dst;
 121         u32     copy;
 122         u32     fill;
 123 };
 124
 125 struct leo_lc_ss1_krn {
 126         u8      unknown;
 127 };
 128
 129 struct leo_lc_ss1_usr {
 130         u8      unknown;
 131 };
 132
 133 struct leo_ld {
 134         u8              xxx0[0xe00];
 135         u32     csr;
 136         u32     wid;
 137         u32     wmask;
 138         u32     widclip;
 139         u32     vclipmin;
 140         u32     vclipmax;
 141         u32     pickmin;        /* SS1 only */
 142         u32     pickmax;        /* SS1 only */
 143         u32     fg;
 144         u32     bg;
 145         u32     src;            /* Copy/Scroll (SS0 only) */
 146         u32     dst;            /* Copy/Scroll/Fill (SS0 only) */
 147         u32     extent;         /* Copy/Scroll/Fill size (SS0 only) */
 148         u32             xxx1[3];
 149         u32     setsem;         /* SS1 only */
 150         u32     clrsem;         /* SS1 only */
 151         u32     clrpick;        /* SS1 only */
 152         u32     clrdat;         /* SS1 only */
 153         u32     alpha;          /* SS1 only */
 154         u8              xxx2[0x2c];
 155         u32     winbg;
 156         u32     planemask;
 157         u32     rop;
 158         u32     z;
 159         u32     dczf;           /* SS1 only */
 160         u32     dczb;           /* SS1 only */
 161         u32     dcs;            /* SS1 only */
 162         u32     dczs;           /* SS1 only */
 163         u32     pickfb;         /* SS1 only */
 164         u32     pickbb;         /* SS1 only */
 165         u32     dcfc;           /* SS1 only */
 166         u32     forcecol;       /* SS1 only */
 167         u32     door[8];        /* SS1 only */
 168         u32     pick[5];        /* SS1 only */
 169 };
 170
 171 #define LEO_SS1_MISC_ENABLE     0x00000001
 172 #define LEO_SS1_MISC_STEREO     0x00000002
 173 struct leo_ld_ss1 {
 174         u8      xxx0[0xef4];
 175         u32     ss1_misc;
 176 };
 177
 178 struct leo_ld_gbl {
 179         u8      unknown;
 180 };
 181
 182 struct leo_par {
 183         spinlock_t              lock;
 184         struct leo_lx_krn       __iomem *lx_krn;
 185         struct leo_lc_ss0_usr   __iomem *lc_ss0_usr;
 186         struct leo_ld_ss0       __iomem *ld_ss0;
 187         struct leo_ld_ss1       __iomem *ld_ss1;
 188         struct leo_cursor       __iomem *cursor;
 189         u32                     extent;
 190         u32                     clut_data[256];
 191
 192         u32                     flags;
 193 #define LEO_FLAG_BLANKED        0x00000001
 194
 195         unsigned long           physbase;
 196         unsigned long           which_io;
 197         unsigned long           fbsize;
 198 };
 199
 200 static void leo_wait(struct leo_lx_krn __iomem *lx_krn)
 201 {
 202         int i;
 203
 204         for (i = 0;
 205              (sbus_readl(&lx_krn->krn_csr) & LEO_KRN_CSR_PROGRESS) && i < 300000;
 206              i++)
 207                 udelay (1); /* Busy wait at most 0.3 sec */
 208         return;
 209 }
 210
 211 /**
 212  *      leo_setcolreg - Optional function. Sets a color register.
 213  *      @regno: boolean, 0 copy local, 1 get_user() function
 214  *      @red: frame buffer colormap structure
 215  *      @green: The green value which can be up to 16 bits wide
 216  *      @blue:  The blue value which can be up to 16 bits wide.
 217  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 218  *      @info: frame buffer info structure
 219  */
 220 static int leo_setcolreg(unsigned regno,
 221                          unsigned red, unsigned green, unsigned blue,
 222                          unsigned transp, struct fb_info *info)
 223 {
 224         struct leo_par *par = (struct leo_par *) info->par;
 225         struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
 226         unsigned long flags;
 227         u32 val;
 228         int i;
 229
 230         if (regno >= 256)
 231                 return 1;
 232
 233         red >>= 8;
 234         green >>= 8;
 235         blue >>= 8;
 236
 237         par->clut_data[regno] = red | (green << 8) | (blue << 16);
 238
 239         spin_lock_irqsave(&par->lock, flags);
 240
 241         leo_wait(lx_krn);
 242
 243         sbus_writel(LEO_KRN_TYPE_CLUTDATA, &lx_krn->krn_type);
 244         for (i = 0; i < 256; i++)
 245                 sbus_writel(par->clut_data[i], &lx_krn->krn_value);
 246         sbus_writel(LEO_KRN_TYPE_CLUT0, &lx_krn->krn_type);
 247
 248         val = sbus_readl(&lx_krn->krn_csr);
 249         val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
 250         sbus_writel(val, &lx_krn->krn_csr);
 251
 252         spin_unlock_irqrestore(&par->lock, flags);
 253
 254         return 0;
 255 }
 256
 257 /**
 258  *      leo_blank - Optional function.  Blanks the display.
 259  *      @blank_mode: the blank mode we want.
 260  *      @info: frame buffer structure that represents a single frame buffer
 261  */
 262 static int leo_blank(int blank, struct fb_info *info)
 263 {
 264         struct leo_par *par = (struct leo_par *) info->par;
 265         struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
 266         unsigned long flags;
 267         u32 val;
 268
 269         spin_lock_irqsave(&par->lock, flags);
 270
 271         switch (blank) {
 272         case FB_BLANK_UNBLANK: /* Unblanking */
 273                 val = sbus_readl(&lx_krn->krn_csr);
 274                 val |= LEO_KRN_CSR_ENABLE;
 275                 sbus_writel(val, &lx_krn->krn_csr);
 276                 par->flags &= ~LEO_FLAG_BLANKED;
 277                 break;
 278
 279         case FB_BLANK_NORMAL: /* Normal blanking */
 280         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 281         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 282         case FB_BLANK_POWERDOWN: /* Poweroff */
 283                 val = sbus_readl(&lx_krn->krn_csr);
 284                 val &= ~LEO_KRN_CSR_ENABLE;
 285                 sbus_writel(val, &lx_krn->krn_csr);
 286                 par->flags |= LEO_FLAG_BLANKED;
 287                 break;
 288         }
 289
 290         spin_unlock_irqrestore(&par->lock, flags);
 291
 292         return 0;
 293 }
 294
 295 static struct sbus_mmap_map leo_mmap_map[] = {
 296         {
 297                 .voff   = LEO_SS0_MAP,
 298                 .poff   = LEO_OFF_SS0,
 299                 .size   = 0x800000
 300         },
 301         {
 302                 .voff   = LEO_LC_SS0_USR_MAP,
 303                 .poff   = LEO_OFF_LC_SS0_USR,
 304                 .size   = 0x1000
 305         },
 306         {
 307                 .voff   = LEO_LD_SS0_MAP,
 308                 .poff   = LEO_OFF_LD_SS0,
 309                 .size   = 0x1000
 310         },
 311         {
 312                 .voff   = LEO_LX_CURSOR_MAP,
 313                 .poff   = LEO_OFF_LX_CURSOR,
 314                 .size   = 0x1000
 315         },
 316         {
 317                 .voff   = LEO_SS1_MAP,
 318                 .poff   = LEO_OFF_SS1,
 319                 .size   = 0x800000
 320         },
 321         {
 322                 .voff   = LEO_LC_SS1_USR_MAP,
 323                 .poff   = LEO_OFF_LC_SS1_USR,
 324                 .size   = 0x1000
 325         },
 326         {
 327                 .voff   = LEO_LD_SS1_MAP,
 328                 .poff   = LEO_OFF_LD_SS1,
 329                 .size   = 0x1000
 330         },
 331         {
 332                 .voff   = LEO_UNK_MAP,
 333                 .poff   = LEO_OFF_UNK,
 334                 .size   = 0x1000
 335         },
 336         {
 337                 .voff   = LEO_LX_KRN_MAP,
 338                 .poff   = LEO_OFF_LX_KRN,
 339                 .size   = 0x1000
 340         },
 341         {
 342                 .voff   = LEO_LC_SS0_KRN_MAP,
 343                 .poff   = LEO_OFF_LC_SS0_KRN,
 344                 .size   = 0x1000
 345         },
 346         {
 347                 .voff   = LEO_LC_SS1_KRN_MAP,
 348                 .poff   = LEO_OFF_LC_SS1_KRN,
 349                 .size   = 0x1000
 350         },
 351         {
 352                 .voff   = LEO_LD_GBL_MAP,
 353                 .poff   = LEO_OFF_LD_GBL,
 354                 .size   = 0x1000
 355         },
 356         {
 357                 .voff   = LEO_UNK2_MAP,
 358                 .poff   = LEO_OFF_UNK2,
 359                 .size   = 0x100000
 360         },
 361         { .size = 0 }
 362 };
 363
 364 static int leo_mmap(struct fb_info *info, struct vm_area_struct *vma)
 365 {
 366         struct leo_par *par = (struct leo_par *)info->par;
 367
 368         return sbusfb_mmap_helper(leo_mmap_map,
 369                                   par->physbase, par->fbsize,
 370                                   par->which_io, vma);
 371 }
 372
 373 static int leo_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 374 {
 375         struct leo_par *par = (struct leo_par *) info->par;
 376
 377         return sbusfb_ioctl_helper(cmd, arg, info,
 378                                    FBTYPE_SUNLEO, 32, par->fbsize);
 379 }
 380
 381 /*
 382  *  Initialisation
 383  */
 384
 385 static void
 386 leo_init_fix(struct fb_info *info, struct device_node *dp)
 387 {
 388         strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));
 389
 390         info->fix.type = FB_TYPE_PACKED_PIXELS;
 391         info->fix.visual = FB_VISUAL_TRUECOLOR;
 392
 393         info->fix.line_length = 8192;
 394
 395         info->fix.accel = FB_ACCEL_SUN_LEO;
 396 }
 397
 398 static void leo_wid_put(struct fb_info *info, struct fb_wid_list *wl)
 399 {
 400         struct leo_par *par = (struct leo_par *) info->par;
 401         struct leo_lx_krn __iomem *lx_krn = par->lx_krn;
 402         struct fb_wid_item *wi;
 403         unsigned long flags;
 404         u32 val;
 405         int i, j;
 406
 407         spin_lock_irqsave(&par->lock, flags);
 408
 409         leo_wait(lx_krn);
 410
 411         for (i = 0, wi = wl->wl_list; i < wl->wl_count; i++, wi++) {
 412                 switch(wi->wi_type) {
 413                 case FB_WID_DBL_8:
 414                         j = (wi->wi_index & 0xf) + 0x40;
 415                         break;
 416
 417                 case FB_WID_DBL_24:
 418                         j = wi->wi_index & 0x3f;
 419                         break;
 420
 421                 default:
 422                         continue;
 423                 };
 424                 sbus_writel(0x5800 + j, &lx_krn->krn_type);
 425                 sbus_writel(wi->wi_values[0], &lx_krn->krn_value);
 426         }
 427         sbus_writel(LEO_KRN_TYPE_WID, &lx_krn->krn_type);
 428
 429         val = sbus_readl(&lx_krn->krn_csr);
 430         val |= (LEO_KRN_CSR_UNK | LEO_KRN_CSR_UNK2);
 431         sbus_writel(val, &lx_krn->krn_csr);
 432
 433         spin_unlock_irqrestore(&par->lock, flags);
 434 }
 435
 436 static void leo_init_wids(struct fb_info *info)
 437 {
 438         struct fb_wid_item wi;
 439         struct fb_wid_list wl;
 440
 441         wl.wl_count = 1;
 442         wl.wl_list = &wi;
 443         wi.wi_type = FB_WID_DBL_8;
 444         wi.wi_index = 0;
 445         wi.wi_values [0] = 0x2c0;
 446         leo_wid_put(info, &wl);
 447         wi.wi_index = 1;
 448         wi.wi_values [0] = 0x30;
 449         leo_wid_put(info, &wl);
 450         wi.wi_index = 2;
 451         wi.wi_values [0] = 0x20;
 452         leo_wid_put(info, &wl);
 453         wi.wi_type = FB_WID_DBL_24;
 454         wi.wi_index = 1;
 455         wi.wi_values [0] = 0x30;
 456         leo_wid_put(info, &wl);
 457
 458 }
 459
 460 static void leo_switch_from_graph(struct fb_info *info)
 461 {
 462         struct leo_par *par = (struct leo_par *) info->par;
 463         struct leo_ld __iomem *ss = (struct leo_ld __iomem *) par->ld_ss0;
 464         unsigned long flags;
 465         u32 val;
 466
 467         spin_lock_irqsave(&par->lock, flags);
 468
 469         par->extent = ((info->var.xres - 1) |
 470                        ((info->var.yres - 1) << 16));
 471
 472         sbus_writel(0xffffffff, &ss->wid);
 473         sbus_writel(0xffff, &ss->wmask);
 474         sbus_writel(0, &ss->vclipmin);
 475         sbus_writel(par->extent, &ss->vclipmax);
 476         sbus_writel(0, &ss->fg);
 477         sbus_writel(0xff000000, &ss->planemask);
 478         sbus_writel(0x310850, &ss->rop);
 479         sbus_writel(0, &ss->widclip);
 480         sbus_writel((info->var.xres-1) | ((info->var.yres-1) << 11),
 481                     &par->lc_ss0_usr->extent);
 482         sbus_writel(4, &par->lc_ss0_usr->addrspace);
 483         sbus_writel(0x80000000, &par->lc_ss0_usr->fill);
 484         sbus_writel(0, &par->lc_ss0_usr->fontt);
 485         do {
 486                 val = sbus_readl(&par->lc_ss0_usr->csr);
 487         } while (val & 0x20000000);
 488
 489         spin_unlock_irqrestore(&par->lock, flags);
 490 }
 491
 492 static int leo_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 493 {
 494         /* We just use this to catch switches out of
 495          * graphics mode.
 496          */
 497         leo_switch_from_graph(info);
 498
 499         if (var->xoffset || var->yoffset || var->vmode)
 500                 return -EINVAL;
 501         return 0;
 502 }
 503
 504 static void leo_init_hw(struct fb_info *info)
 505 {
 506         struct leo_par *par = (struct leo_par *) info->par;
 507         u32 val;
 508
 509         val = sbus_readl(&par->ld_ss1->ss1_misc);
 510         val |= LEO_SS1_MISC_ENABLE;
 511         sbus_writel(val, &par->ld_ss1->ss1_misc);
 512
 513         leo_switch_from_graph(info);
 514 }
 515
 516 static void leo_fixup_var_rgb(struct fb_var_screeninfo *var)
 517 {
 518         var->red.offset = 0;
 519         var->red.length = 8;
 520         var->green.offset = 8;
 521         var->green.length = 8;
 522         var->blue.offset = 16;
 523         var->blue.length = 8;
 524         var->transp.offset = 0;
 525         var->transp.length = 0;
 526 }
 527
 528 static void leo_unmap_regs(struct of_device *op, struct fb_info *info,
 529                            struct leo_par *par)
 530 {
 531         if (par->lc_ss0_usr)
 532                 of_iounmap(&op->resource[0], par->lc_ss0_usr, 0x1000);
 533         if (par->ld_ss0)
 534                 of_iounmap(&op->resource[0], par->ld_ss0, 0x1000);
 535         if (par->ld_ss1)
 536                 of_iounmap(&op->resource[0], par->ld_ss1, 0x1000);
 537         if (par->lx_krn)
 538                 of_iounmap(&op->resource[0], par->lx_krn, 0x1000);
 539         if (par->cursor)
 540                 of_iounmap(&op->resource[0],
 541                            par->cursor, sizeof(struct leo_cursor));
 542         if (info->screen_base)
 543                 of_iounmap(&op->resource[0], info->screen_base, 0x800000);
 544 }
 545
 546 static int __devinit leo_probe(struct of_device *op, const struct of_device_id *match)
 547 {
 548         struct device_node *dp = op->node;
 549         struct fb_info *info;
 550         struct leo_par *par;
 551         int linebytes, err;
 552
 553         info = framebuffer_alloc(sizeof(struct leo_par), &op->dev);
 554
 555         err = -ENOMEM;
 556         if (!info)
 557                 goto out_err;
 558         par = info->par;
 559
 560         spin_lock_init(&par->lock);
 561
 562         par->physbase = op->resource[0].start;
 563         par->which_io = op->resource[0].flags & IORESOURCE_BITS;
 564
 565         sbusfb_fill_var(&info->var, dp->node, 32);
 566         leo_fixup_var_rgb(&info->var);
 567
 568         linebytes = of_getintprop_default(dp, "linebytes",
 569                                           info->var.xres);
 570         par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
 571
 572         par->lc_ss0_usr =
 573                 of_ioremap(&op->resource[0], LEO_OFF_LC_SS0_USR,
 574                            0x1000, "leolc ss0usr");
 575         par->ld_ss0 =
 576                 of_ioremap(&op->resource[0], LEO_OFF_LD_SS0,
 577                            0x1000, "leold ss0");
 578         par->ld_ss1 =
 579                 of_ioremap(&op->resource[0], LEO_OFF_LD_SS1,
 580                            0x1000, "leold ss1");
 581         par->lx_krn =
 582                 of_ioremap(&op->resource[0], LEO_OFF_LX_KRN,
 583                            0x1000, "leolx krn");
 584         par->cursor =
 585                 of_ioremap(&op->resource[0], LEO_OFF_LX_CURSOR,
 586                            sizeof(struct leo_cursor), "leolx cursor");
 587         info->screen_base =
 588                 of_ioremap(&op->resource[0], LEO_OFF_SS0,
 589                            0x800000, "leo ram");
 590         if (!par->lc_ss0_usr ||
 591             !par->ld_ss0 ||
 592             !par->ld_ss1 ||
 593             !par->lx_krn ||
 594             !par->cursor ||
 595             !info->screen_base)
 596                 goto out_unmap_regs;
 597
 598         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 599         info->fbops = &leo_ops;
 600
 601         leo_init_wids(info);
 602         leo_init_hw(info);
 603
 604         leo_blank(0, info);
 605
 606         if (fb_alloc_cmap(&info->cmap, 256, 0))
 607                 goto out_unmap_regs;
 608
 609         leo_init_fix(info, dp);
 610
 611         err = register_framebuffer(info);
 612         if (err < 0)
 613                 goto out_dealloc_cmap;
 614
 615         dev_set_drvdata(&op->dev, info);
 616
 617         printk("%s: leo at %lx:%lx\n",
 618                dp->full_name,
 619                par->which_io, par->physbase);
 620
 621         return 0;
 622
 623 out_dealloc_cmap:
 624         fb_dealloc_cmap(&info->cmap);
 625
 626 out_unmap_regs:
 627         leo_unmap_regs(op, info, par);
 628         framebuffer_release(info);
 629
 630 out_err:
 631         return err;
 632 }
 633
 634 static int __devexit leo_remove(struct of_device *op)
 635 {
 636         struct fb_info *info = dev_get_drvdata(&op->dev);
 637         struct leo_par *par = info->par;
 638
 639         unregister_framebuffer(info);
 640         fb_dealloc_cmap(&info->cmap);
 641
 642         leo_unmap_regs(op, info, par);
 643
 644         framebuffer_release(info);
 645
 646         dev_set_drvdata(&op->dev, NULL);
 647
 648         return 0;
 649 }
 650
 651 static struct of_device_id leo_match[] = {
 652         {
 653                 .name = "leo",
 654         },
 655         {},
 656 };
 657 MODULE_DEVICE_TABLE(of, leo_match);
 658
 659 static struct of_platform_driver leo_driver = {
 660         .name           = "leo",
 661         .match_table    = leo_match,
 662         .probe          = leo_probe,
 663         .remove         = __devexit_p(leo_remove),
 664 };
 665
 666 static int __init leo_init(void)
 667 {
 668         if (fb_get_options("leofb", NULL))
 669                 return -ENODEV;
 670
 671         return of_register_driver(&leo_driver, &of_bus_type);
 672 }
 673
 674 static void __exit leo_exit(void)
 675 {
 676         of_unregister_driver(&leo_driver);
 677 }
 678
 679 module_init(leo_init);
 680 module_exit(leo_exit);
 681
 682 MODULE_DESCRIPTION("framebuffer driver for LEO chipsets");
 683 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 684 MODULE_VERSION("2.0");
 685 MODULE_LICENSE("GPL");