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