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