git.oblomov.eu Git - linux-2.6/blob - drivers/video/cg14.c

   1 /* cg14.c: CGFOURTEEN frame buffer driver
   2  *
   3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
   4  * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
   5  * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
   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/sbus.h>
  22 #include <asm/oplib.h>
  23 #include <asm/fbio.h>
  24
  25 #include "sbuslib.h"
  26
  27 /*
  28  * Local functions.
  29  */
  30
  31 static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
  32                          unsigned, struct fb_info *);
  33
  34 static int cg14_mmap(struct fb_info *, struct vm_area_struct *);
  35 static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
  36 static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *);
  37
  38 /*
  39  *  Frame buffer operations
  40  */
  41
  42 static struct fb_ops cg14_ops = {
  43         .owner                  = THIS_MODULE,
  44         .fb_setcolreg           = cg14_setcolreg,
  45         .fb_pan_display         = cg14_pan_display,
  46         .fb_fillrect            = cfb_fillrect,
  47         .fb_copyarea            = cfb_copyarea,
  48         .fb_imageblit           = cfb_imageblit,
  49         .fb_mmap                = cg14_mmap,
  50         .fb_ioctl               = cg14_ioctl,
  51 #ifdef CONFIG_COMPAT
  52         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  53 #endif
  54 };
  55
  56 #define CG14_MCR_INTENABLE_SHIFT        7
  57 #define CG14_MCR_INTENABLE_MASK         0x80
  58 #define CG14_MCR_VIDENABLE_SHIFT        6
  59 #define CG14_MCR_VIDENABLE_MASK         0x40
  60 #define CG14_MCR_PIXMODE_SHIFT          4
  61 #define CG14_MCR_PIXMODE_MASK           0x30
  62 #define CG14_MCR_TMR_SHIFT              2
  63 #define CG14_MCR_TMR_MASK               0x0c
  64 #define CG14_MCR_TMENABLE_SHIFT         1
  65 #define CG14_MCR_TMENABLE_MASK          0x02
  66 #define CG14_MCR_RESET_SHIFT            0
  67 #define CG14_MCR_RESET_MASK             0x01
  68 #define CG14_REV_REVISION_SHIFT         4
  69 #define CG14_REV_REVISION_MASK          0xf0
  70 #define CG14_REV_IMPL_SHIFT             0
  71 #define CG14_REV_IMPL_MASK              0x0f
  72 #define CG14_VBR_FRAMEBASE_SHIFT        12
  73 #define CG14_VBR_FRAMEBASE_MASK         0x00fff000
  74 #define CG14_VMCR1_SETUP_SHIFT          0
  75 #define CG14_VMCR1_SETUP_MASK           0x000001ff
  76 #define CG14_VMCR1_VCONFIG_SHIFT        9
  77 #define CG14_VMCR1_VCONFIG_MASK         0x00000e00
  78 #define CG14_VMCR2_REFRESH_SHIFT        0
  79 #define CG14_VMCR2_REFRESH_MASK         0x00000001
  80 #define CG14_VMCR2_TESTROWCNT_SHIFT     1
  81 #define CG14_VMCR2_TESTROWCNT_MASK      0x00000002
  82 #define CG14_VMCR2_FBCONFIG_SHIFT       2
  83 #define CG14_VMCR2_FBCONFIG_MASK        0x0000000c
  84 #define CG14_VCR_REFRESHREQ_SHIFT       0
  85 #define CG14_VCR_REFRESHREQ_MASK        0x000003ff
  86 #define CG14_VCR1_REFRESHENA_SHIFT      10
  87 #define CG14_VCR1_REFRESHENA_MASK       0x00000400
  88 #define CG14_VCA_CAD_SHIFT              0
  89 #define CG14_VCA_CAD_MASK               0x000003ff
  90 #define CG14_VCA_VERS_SHIFT             10
  91 #define CG14_VCA_VERS_MASK              0x00000c00
  92 #define CG14_VCA_RAMSPEED_SHIFT         12
  93 #define CG14_VCA_RAMSPEED_MASK          0x00001000
  94 #define CG14_VCA_8MB_SHIFT              13
  95 #define CG14_VCA_8MB_MASK               0x00002000
  96
  97 #define CG14_MCR_PIXMODE_8              0
  98 #define CG14_MCR_PIXMODE_16             2
  99 #define CG14_MCR_PIXMODE_32             3
 100
 101 struct cg14_regs{
 102         volatile u8 mcr;        /* Master Control Reg */
 103         volatile u8 ppr;        /* Packed Pixel Reg */
 104         volatile u8 tms[2];     /* Test Mode Status Regs */
 105         volatile u8 msr;        /* Master Status Reg */
 106         volatile u8 fsr;        /* Fault Status Reg */
 107         volatile u8 rev;        /* Revision & Impl */
 108         volatile u8 ccr;        /* Clock Control Reg */
 109         volatile u32 tmr;       /* Test Mode Read Back */
 110         volatile u8 mod;        /* Monitor Operation Data Reg */
 111         volatile u8 acr;        /* Aux Control */
 112         u8 xxx0[6];
 113         volatile u16 hct;       /* Hor Counter */
 114         volatile u16 vct;       /* Vert Counter */
 115         volatile u16 hbs;       /* Hor Blank Start */
 116         volatile u16 hbc;       /* Hor Blank Clear */
 117         volatile u16 hss;       /* Hor Sync Start */
 118         volatile u16 hsc;       /* Hor Sync Clear */
 119         volatile u16 csc;       /* Composite Sync Clear */
 120         volatile u16 vbs;       /* Vert Blank Start */
 121         volatile u16 vbc;       /* Vert Blank Clear */
 122         volatile u16 vss;       /* Vert Sync Start */
 123         volatile u16 vsc;       /* Vert Sync Clear */
 124         volatile u16 xcs;
 125         volatile u16 xcc;
 126         volatile u16 fsa;       /* Fault Status Address */
 127         volatile u16 adr;       /* Address Registers */
 128         u8 xxx1[0xce];
 129         volatile u8 pcg[0x100]; /* Pixel Clock Generator */
 130         volatile u32 vbr;       /* Frame Base Row */
 131         volatile u32 vmcr;      /* VBC Master Control */
 132         volatile u32 vcr;       /* VBC refresh */
 133         volatile u32 vca;       /* VBC Config */
 134 };
 135
 136 #define CG14_CCR_ENABLE 0x04
 137 #define CG14_CCR_SELECT 0x02    /* HW/Full screen */
 138
 139 struct cg14_cursor {
 140         volatile u32 cpl0[32];  /* Enable plane 0 */
 141         volatile u32 cpl1[32];  /* Color selection plane */
 142         volatile u8 ccr;        /* Cursor Control Reg */
 143         u8 xxx0[3];
 144         volatile u16 cursx;     /* Cursor x,y position */
 145         volatile u16 cursy;     /* Cursor x,y position */
 146         volatile u32 color0;
 147         volatile u32 color1;
 148         u32 xxx1[0x1bc];
 149         volatile u32 cpl0i[32]; /* Enable plane 0 autoinc */
 150         volatile u32 cpl1i[32]; /* Color selection autoinc */
 151 };
 152
 153 struct cg14_dac {
 154         volatile u8 addr;       /* Address Register */
 155         u8 xxx0[255];
 156         volatile u8 glut;       /* Gamma table */
 157         u8 xxx1[255];
 158         volatile u8 select;     /* Register Select */
 159         u8 xxx2[255];
 160         volatile u8 mode;       /* Mode Register */
 161 };
 162
 163 struct cg14_xlut{
 164         volatile u8 x_xlut [256];
 165         volatile u8 x_xlutd [256];
 166         u8 xxx0[0x600];
 167         volatile u8 x_xlut_inc [256];
 168         volatile u8 x_xlutd_inc [256];
 169 };
 170
 171 /* Color look up table (clut) */
 172 /* Each one of these arrays hold the color lookup table (for 256
 173  * colors) for each MDI page (I assume then there should be 4 MDI
 174  * pages, I still wonder what they are.  I have seen NeXTStep split
 175  * the screen in four parts, while operating in 24 bits mode.  Each
 176  * integer holds 4 values: alpha value (transparency channel, thanks
 177  * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
 178  *
 179  * I currently use the clut instead of the Xlut
 180  */
 181 struct cg14_clut {
 182         u32 c_clut [256];
 183         u32 c_clutd [256];    /* i wonder what the 'd' is for */
 184         u32 c_clut_inc [256];
 185         u32 c_clutd_inc [256];
 186 };
 187
 188 #define CG14_MMAP_ENTRIES       16
 189
 190 struct cg14_par {
 191         spinlock_t              lock;
 192         struct cg14_regs        __iomem *regs;
 193         struct cg14_clut        __iomem *clut;
 194         struct cg14_cursor      __iomem *cursor;
 195
 196         u32                     flags;
 197 #define CG14_FLAG_BLANKED       0x00000001
 198
 199         unsigned long           physbase;
 200         unsigned long           iospace;
 201         unsigned long           fbsize;
 202
 203         struct sbus_mmap_map    mmap_map[CG14_MMAP_ENTRIES];
 204
 205         int                     mode;
 206         int                     ramsize;
 207         struct sbus_dev         *sdev;
 208 };
 209
 210 static void __cg14_reset(struct cg14_par *par)
 211 {
 212         struct cg14_regs __iomem *regs = par->regs;
 213         u8 val;
 214
 215         val = sbus_readb(&regs->mcr);
 216         val &= ~(CG14_MCR_PIXMODE_MASK);
 217         sbus_writeb(val, &regs->mcr);
 218 }
 219
 220 static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 221 {
 222         struct cg14_par *par = (struct cg14_par *) info->par;
 223         unsigned long flags;
 224
 225         /* We just use this to catch switches out of
 226          * graphics mode.
 227          */
 228         spin_lock_irqsave(&par->lock, flags);
 229         __cg14_reset(par);
 230         spin_unlock_irqrestore(&par->lock, flags);
 231
 232         if (var->xoffset || var->yoffset || var->vmode)
 233                 return -EINVAL;
 234         return 0;
 235 }
 236
 237 /**
 238  *      cg14_setcolreg - Optional function. Sets a color register.
 239  *      @regno: boolean, 0 copy local, 1 get_user() function
 240  *      @red: frame buffer colormap structure
 241  *      @green: The green value which can be up to 16 bits wide
 242  *      @blue:  The blue value which can be up to 16 bits wide.
 243  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 244  *      @info: frame buffer info structure
 245  */
 246 static int cg14_setcolreg(unsigned regno,
 247                           unsigned red, unsigned green, unsigned blue,
 248                           unsigned transp, struct fb_info *info)
 249 {
 250         struct cg14_par *par = (struct cg14_par *) info->par;
 251         struct cg14_clut __iomem *clut = par->clut;
 252         unsigned long flags;
 253         u32 val;
 254
 255         if (regno >= 256)
 256                 return 1;
 257
 258         red >>= 8;
 259         green >>= 8;
 260         blue >>= 8;
 261         val = (red | (green << 8) | (blue << 16));
 262
 263         spin_lock_irqsave(&par->lock, flags);
 264         sbus_writel(val, &clut->c_clut[regno]);
 265         spin_unlock_irqrestore(&par->lock, flags);
 266
 267         return 0;
 268 }
 269
 270 static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma)
 271 {
 272         struct cg14_par *par = (struct cg14_par *) info->par;
 273
 274         return sbusfb_mmap_helper(par->mmap_map,
 275                                   par->physbase, par->fbsize,
 276                                   par->iospace, vma);
 277 }
 278
 279 static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 280 {
 281         struct cg14_par *par = (struct cg14_par *) info->par;
 282         struct cg14_regs __iomem *regs = par->regs;
 283         struct mdi_cfginfo kmdi, __user *mdii;
 284         unsigned long flags;
 285         int cur_mode, mode, ret = 0;
 286
 287         switch (cmd) {
 288         case MDI_RESET:
 289                 spin_lock_irqsave(&par->lock, flags);
 290                 __cg14_reset(par);
 291                 spin_unlock_irqrestore(&par->lock, flags);
 292                 break;
 293
 294         case MDI_GET_CFGINFO:
 295                 memset(&kmdi, 0, sizeof(kmdi));
 296
 297                 spin_lock_irqsave(&par->lock, flags);
 298                 kmdi.mdi_type = FBTYPE_MDICOLOR;
 299                 kmdi.mdi_height = info->var.yres;
 300                 kmdi.mdi_width = info->var.xres;
 301                 kmdi.mdi_mode = par->mode;
 302                 kmdi.mdi_pixfreq = 72; /* FIXME */
 303                 kmdi.mdi_size = par->ramsize;
 304                 spin_unlock_irqrestore(&par->lock, flags);
 305
 306                 mdii = (struct mdi_cfginfo __user *) arg;
 307                 if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
 308                         ret = -EFAULT;
 309                 break;
 310
 311         case MDI_SET_PIXELMODE:
 312                 if (get_user(mode, (int __user *) arg)) {
 313                         ret = -EFAULT;
 314                         break;
 315                 }
 316
 317                 spin_lock_irqsave(&par->lock, flags);
 318                 cur_mode = sbus_readb(&regs->mcr);
 319                 cur_mode &= ~CG14_MCR_PIXMODE_MASK;
 320                 switch(mode) {
 321                 case MDI_32_PIX:
 322                         cur_mode |= (CG14_MCR_PIXMODE_32 <<
 323                                      CG14_MCR_PIXMODE_SHIFT);
 324                         break;
 325
 326                 case MDI_16_PIX:
 327                         cur_mode |= (CG14_MCR_PIXMODE_16 <<
 328                                      CG14_MCR_PIXMODE_SHIFT);
 329                         break;
 330
 331                 case MDI_8_PIX:
 332                         break;
 333
 334                 default:
 335                         ret = -ENOSYS;
 336                         break;
 337                 };
 338                 if (!ret) {
 339                         sbus_writeb(cur_mode, &regs->mcr);
 340                         par->mode = mode;
 341                 }
 342                 spin_unlock_irqrestore(&par->lock, flags);
 343                 break;
 344
 345         default:
 346                 ret = sbusfb_ioctl_helper(cmd, arg, info,
 347                                           FBTYPE_MDICOLOR, 8, par->fbsize);
 348                 break;
 349         };
 350
 351         return ret;
 352 }
 353
 354 /*
 355  *  Initialisation
 356  */
 357
 358 static void cg14_init_fix(struct fb_info *info, int linebytes)
 359 {
 360         struct cg14_par *par = (struct cg14_par *)info->par;
 361         const char *name;
 362
 363         name = "cgfourteen";
 364         if (par->sdev)
 365                 name = par->sdev->prom_name;
 366
 367         strlcpy(info->fix.id, name, sizeof(info->fix.id));
 368
 369         info->fix.type = FB_TYPE_PACKED_PIXELS;
 370         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 371
 372         info->fix.line_length = linebytes;
 373
 374         info->fix.accel = FB_ACCEL_SUN_CG14;
 375 }
 376
 377 static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] __initdata = {
 378         {
 379                 .voff   = CG14_REGS,
 380                 .poff   = 0x80000000,
 381                 .size   = 0x1000
 382         },
 383         {
 384                 .voff   = CG14_XLUT,
 385                 .poff   = 0x80003000,
 386                 .size   = 0x1000
 387         },
 388         {
 389                 .voff   = CG14_CLUT1,
 390                 .poff   = 0x80004000,
 391                 .size   = 0x1000
 392         },
 393         {
 394                 .voff   = CG14_CLUT2,
 395                 .poff   = 0x80005000,
 396                 .size   = 0x1000
 397         },
 398         {
 399                 .voff   = CG14_CLUT3,
 400                 .poff   = 0x80006000,
 401                 .size   = 0x1000
 402         },
 403         {
 404                 .voff   = CG3_MMAP_OFFSET - 0x7000,
 405                 .poff   = 0x80000000,
 406                 .size   = 0x7000
 407         },
 408         {
 409                 .voff   = CG3_MMAP_OFFSET,
 410                 .poff   = 0x00000000,
 411                 .size   = SBUS_MMAP_FBSIZE(1)
 412         },
 413         {
 414                 .voff   = MDI_CURSOR_MAP,
 415                 .poff   = 0x80001000,
 416                 .size   = 0x1000
 417         },
 418         {
 419                 .voff   = MDI_CHUNKY_BGR_MAP,
 420                 .poff   = 0x01000000,
 421                 .size   = 0x400000
 422         },
 423         {
 424                 .voff   = MDI_PLANAR_X16_MAP,
 425                 .poff   = 0x02000000,
 426                 .size   = 0x200000
 427         },
 428         {
 429                 .voff   = MDI_PLANAR_C16_MAP,
 430                 .poff   = 0x02800000,
 431                 .size   = 0x200000
 432         },
 433         {
 434                 .voff   = MDI_PLANAR_X32_MAP,
 435                 .poff   = 0x03000000,
 436                 .size   = 0x100000
 437         },
 438         {
 439                 .voff   = MDI_PLANAR_B32_MAP,
 440                 .poff   = 0x03400000,
 441                 .size   = 0x100000
 442         },
 443         {
 444                 .voff   = MDI_PLANAR_G32_MAP,
 445                 .poff   = 0x03800000,
 446                 .size   = 0x100000
 447         },
 448         {
 449                 .voff   = MDI_PLANAR_R32_MAP,
 450                 .poff   = 0x03c00000,
 451                 .size   = 0x100000
 452         },
 453         { .size = 0 }
 454 };
 455
 456 struct all_info {
 457         struct fb_info info;
 458         struct cg14_par par;
 459         struct list_head list;
 460 };
 461 static LIST_HEAD(cg14_list);
 462
 463 static void cg14_init_one(struct sbus_dev *sdev, int node, int parent_node)
 464 {
 465         struct all_info *all;
 466         unsigned long phys, rphys;
 467         u32 bases[6];
 468         int is_8mb, linebytes, i;
 469
 470         if (!sdev) {
 471                 if (prom_getproperty(node, "address",
 472                                      (char *) &bases[0], sizeof(bases)) <= 0
 473                     || !bases[0]) {
 474                         printk(KERN_ERR "cg14: Device is not mapped.\n");
 475                         return;
 476                 }
 477                 if (__get_iospace(bases[0]) != __get_iospace(bases[1])) {
 478                         printk(KERN_ERR "cg14: I/O spaces don't match.\n");
 479                         return;
 480                 }
 481         }
 482
 483         all = kmalloc(sizeof(*all), GFP_KERNEL);
 484         if (!all) {
 485                 printk(KERN_ERR "cg14: Cannot allocate memory.\n");
 486                 return;
 487         }
 488         memset(all, 0, sizeof(*all));
 489
 490         INIT_LIST_HEAD(&all->list);
 491
 492         spin_lock_init(&all->par.lock);
 493
 494         sbusfb_fill_var(&all->info.var, node, 8);
 495         all->info.var.red.length = 8;
 496         all->info.var.green.length = 8;
 497         all->info.var.blue.length = 8;
 498
 499         linebytes = prom_getintdefault(node, "linebytes",
 500                                        all->info.var.xres);
 501         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
 502
 503         all->par.sdev = sdev;
 504         if (sdev) {
 505                 rphys = sdev->reg_addrs[0].phys_addr;
 506                 all->par.physbase = phys = sdev->reg_addrs[1].phys_addr;
 507                 all->par.iospace = sdev->reg_addrs[0].which_io;
 508
 509                 all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
 510                                      sizeof(struct cg14_regs),
 511                                      "cg14 regs");
 512                 all->par.clut = sbus_ioremap(&sdev->resource[0], CG14_CLUT1,
 513                                      sizeof(struct cg14_clut),
 514                                      "cg14 clut");
 515                 all->par.cursor = sbus_ioremap(&sdev->resource[0], CG14_CURSORREGS,
 516                                      sizeof(struct cg14_cursor),
 517                                      "cg14 cursor");
 518                 all->info.screen_base = sbus_ioremap(&sdev->resource[1], 0,
 519                                      all->par.fbsize, "cg14 ram");
 520         } else {
 521                 rphys = __get_phys(bases[0]);
 522                 all->par.physbase = phys = __get_phys(bases[1]);
 523                 all->par.iospace = __get_iospace(bases[0]);
 524                 all->par.regs = (struct cg14_regs __iomem *)(unsigned long)bases[0];
 525                 all->par.clut = (struct cg14_clut __iomem *)((unsigned long)bases[0] +
 526                                                      CG14_CLUT1);
 527                 all->par.cursor =
 528                         (struct cg14_cursor __iomem *)((unsigned long)bases[0] +
 529                                                CG14_CURSORREGS);
 530
 531                 all->info.screen_base = (char __iomem *)(unsigned long)bases[1];
 532         }
 533
 534         prom_getproperty(node, "reg", (char *) &bases[0], sizeof(bases));
 535         is_8mb = (bases[5] == 0x800000);
 536
 537         if (sizeof(all->par.mmap_map) != sizeof(__cg14_mmap_map)) {
 538                 extern void __cg14_mmap_sized_wrongly(void);
 539
 540                 __cg14_mmap_sized_wrongly();
 541         }
 542
 543         memcpy(&all->par.mmap_map, &__cg14_mmap_map, sizeof(all->par.mmap_map));
 544         for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
 545                 struct sbus_mmap_map *map = &all->par.mmap_map[i];
 546
 547                 if (!map->size)
 548                         break;
 549                 if (map->poff & 0x80000000)
 550                         map->poff = (map->poff & 0x7fffffff) + rphys - phys;
 551                 if (is_8mb &&
 552                     map->size >= 0x100000 &&
 553                     map->size <= 0x400000)
 554                         map->size *= 2;
 555         }
 556
 557         all->par.mode = MDI_8_PIX;
 558         all->par.ramsize = (is_8mb ? 0x800000 : 0x400000);
 559
 560         all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 561         all->info.fbops = &cg14_ops;
 562         all->info.par = &all->par;
 563
 564         __cg14_reset(&all->par);
 565
 566         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 567                 printk(KERN_ERR "cg14: Could not allocate color map.\n");
 568                 kfree(all);
 569                 return;
 570         }
 571         fb_set_cmap(&all->info.cmap, &all->info);
 572
 573         cg14_init_fix(&all->info, linebytes);
 574
 575         if (register_framebuffer(&all->info) < 0) {
 576                 printk(KERN_ERR "cg14: Could not register framebuffer.\n");
 577                 fb_dealloc_cmap(&all->info.cmap);
 578                 kfree(all);
 579                 return;
 580         }
 581
 582         list_add(&all->list, &cg14_list);
 583
 584         printk("cg14: cgfourteen at %lx:%lx, %dMB\n",
 585                all->par.iospace, all->par.physbase, all->par.ramsize >> 20);
 586
 587 }
 588
 589 int __init cg14_init(void)
 590 {
 591         struct sbus_bus *sbus;
 592         struct sbus_dev *sdev;
 593
 594         if (fb_get_options("cg14fb", NULL))
 595                 return -ENODEV;
 596
 597 #ifdef CONFIG_SPARC32
 598         {
 599                 int root, node;
 600
 601                 root = prom_getchild(prom_root_node);
 602                 root = prom_searchsiblings(root, "obio");
 603                 if (root) {
 604                         node = prom_searchsiblings(prom_getchild(root),
 605                                                    "cgfourteen");
 606                         if (node)
 607                                 cg14_init_one(NULL, node, root);
 608                 }
 609         }
 610 #endif
 611         for_all_sbusdev(sdev, sbus) {
 612                 if (!strcmp(sdev->prom_name, "cgfourteen"))
 613                         cg14_init_one(sdev, sdev->prom_node, sbus->prom_node);
 614         }
 615
 616         return 0;
 617 }
 618
 619 void __exit cg14_exit(void)
 620 {
 621         struct list_head *pos, *tmp;
 622
 623         list_for_each_safe(pos, tmp, &cg14_list) {
 624                 struct all_info *all = list_entry(pos, typeof(*all), list);
 625
 626                 unregister_framebuffer(&all->info);
 627                 fb_dealloc_cmap(&all->info.cmap);
 628                 kfree(all);
 629         }
 630 }
 631
 632 int __init
 633 cg14_setup(char *arg)
 634 {
 635         /* No cmdline options yet... */
 636         return 0;
 637 }
 638
 639 module_init(cg14_init);
 640
 641 #ifdef MODULE
 642 module_exit(cg14_exit);
 643 #endif
 644
 645 MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
 646 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
 647 MODULE_LICENSE("GPL");