linux/drivers/video/fbdev/pm3fb.c
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   1/*
   2 *  linux/drivers/video/pm3fb.c -- 3DLabs Permedia3 frame buffer device
   3 *
   4 *  Copyright (C) 2001 Romain Dolbeau <romain@dolbeau.org>.
   5 *
   6 *  Ported to 2.6 kernel on 1 May 2007 by Krzysztof Helt <krzysztof.h1@wp.pl>
   7 *      based on pm2fb.c
   8 *
   9 *  Based on code written by:
  10 *         Sven Luther, <luther@dpt-info.u-strasbg.fr>
  11 *         Alan Hourihane, <alanh@fairlite.demon.co.uk>
  12 *         Russell King, <rmk@arm.linux.org.uk>
  13 *  Based on linux/drivers/video/skeletonfb.c:
  14 *      Copyright (C) 1997 Geert Uytterhoeven
  15 *  Based on linux/driver/video/pm2fb.c:
  16 *      Copyright (C) 1998-1999 Ilario Nardinocchi (nardinoc@CS.UniBO.IT)
  17 *      Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
  18 *
  19 *  This file is subject to the terms and conditions of the GNU General Public
  20 *  License. See the file COPYING in the main directory of this archive for
  21 *  more details.
  22 *
  23 */
  24
  25#include <linux/module.h>
  26#include <linux/kernel.h>
  27#include <linux/errno.h>
  28#include <linux/string.h>
  29#include <linux/mm.h>
  30#include <linux/slab.h>
  31#include <linux/delay.h>
  32#include <linux/fb.h>
  33#include <linux/init.h>
  34#include <linux/pci.h>
  35
  36#include <video/pm3fb.h>
  37
  38#if !defined(CONFIG_PCI)
  39#error "Only generic PCI cards supported."
  40#endif
  41
  42#undef PM3FB_MASTER_DEBUG
  43#ifdef PM3FB_MASTER_DEBUG
  44#define DPRINTK(a, b...)        \
  45        printk(KERN_DEBUG "pm3fb: %s: " a, __func__ , ## b)
  46#else
  47#define DPRINTK(a, b...)
  48#endif
  49
  50#define PM3_PIXMAP_SIZE (2048 * 4)
  51
  52/*
  53 * Driver data
  54 */
  55static int hwcursor = 1;
  56static char *mode_option;
  57static bool noaccel;
  58static bool nomtrr;
  59
  60/*
  61 * This structure defines the hardware state of the graphics card. Normally
  62 * you place this in a header file in linux/include/video. This file usually
  63 * also includes register information. That allows other driver subsystems
  64 * and userland applications the ability to use the same header file to
  65 * avoid duplicate work and easy porting of software.
  66 */
  67struct pm3_par {
  68        unsigned char   __iomem *v_regs;/* virtual address of p_regs */
  69        u32             video;          /* video flags before blanking */
  70        u32             base;           /* screen base in 128 bits unit */
  71        u32             palette[16];
  72        int             wc_cookie;
  73};
  74
  75/*
  76 * Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo
  77 * if we don't use modedb. If we do use modedb see pm3fb_init how to use it
  78 * to get a fb_var_screeninfo. Otherwise define a default var as well.
  79 */
  80static struct fb_fix_screeninfo pm3fb_fix = {
  81        .id =           "Permedia3",
  82        .type =         FB_TYPE_PACKED_PIXELS,
  83        .visual =       FB_VISUAL_PSEUDOCOLOR,
  84        .xpanstep =     1,
  85        .ypanstep =     1,
  86        .ywrapstep =    0,
  87        .accel =        FB_ACCEL_3DLABS_PERMEDIA3,
  88};
  89
  90/*
  91 * Utility functions
  92 */
  93
  94static inline u32 PM3_READ_REG(struct pm3_par *par, s32 off)
  95{
  96        return fb_readl(par->v_regs + off);
  97}
  98
  99static inline void PM3_WRITE_REG(struct pm3_par *par, s32 off, u32 v)
 100{
 101        fb_writel(v, par->v_regs + off);
 102}
 103
 104static inline void PM3_WAIT(struct pm3_par *par, u32 n)
 105{
 106        while (PM3_READ_REG(par, PM3InFIFOSpace) < n)
 107                cpu_relax();
 108}
 109
 110static inline void PM3_WRITE_DAC_REG(struct pm3_par *par, unsigned r, u8 v)
 111{
 112        PM3_WAIT(par, 3);
 113        PM3_WRITE_REG(par, PM3RD_IndexHigh, (r >> 8) & 0xff);
 114        PM3_WRITE_REG(par, PM3RD_IndexLow, r & 0xff);
 115        wmb();
 116        PM3_WRITE_REG(par, PM3RD_IndexedData, v);
 117        wmb();
 118}
 119
 120static inline void pm3fb_set_color(struct pm3_par *par, unsigned char regno,
 121                        unsigned char r, unsigned char g, unsigned char b)
 122{
 123        PM3_WAIT(par, 4);
 124        PM3_WRITE_REG(par, PM3RD_PaletteWriteAddress, regno);
 125        wmb();
 126        PM3_WRITE_REG(par, PM3RD_PaletteData, r);
 127        wmb();
 128        PM3_WRITE_REG(par, PM3RD_PaletteData, g);
 129        wmb();
 130        PM3_WRITE_REG(par, PM3RD_PaletteData, b);
 131        wmb();
 132}
 133
 134static void pm3fb_clear_colormap(struct pm3_par *par,
 135                        unsigned char r, unsigned char g, unsigned char b)
 136{
 137        int i;
 138
 139        for (i = 0; i < 256 ; i++)
 140                pm3fb_set_color(par, i, r, g, b);
 141
 142}
 143
 144/* Calculating various clock parameters */
 145static void pm3fb_calculate_clock(unsigned long reqclock,
 146                                unsigned char *prescale,
 147                                unsigned char *feedback,
 148                                unsigned char *postscale)
 149{
 150        int f, pre, post;
 151        unsigned long freq;
 152        long freqerr = 1000;
 153        long currerr;
 154
 155        for (f = 1; f < 256; f++) {
 156                for (pre = 1; pre < 256; pre++) {
 157                        for (post = 0; post < 5; post++) {
 158                                freq = ((2*PM3_REF_CLOCK * f) >> post) / pre;
 159                                currerr = (reqclock > freq)
 160                                        ? reqclock - freq
 161                                        : freq - reqclock;
 162                                if (currerr < freqerr) {
 163                                        freqerr = currerr;
 164                                        *feedback = f;
 165                                        *prescale = pre;
 166                                        *postscale = post;
 167                                }
 168                        }
 169                }
 170        }
 171}
 172
 173static inline int pm3fb_depth(const struct fb_var_screeninfo *var)
 174{
 175        if (var->bits_per_pixel == 16)
 176                return var->red.length + var->green.length
 177                        + var->blue.length;
 178
 179        return var->bits_per_pixel;
 180}
 181
 182static inline int pm3fb_shift_bpp(unsigned bpp, int v)
 183{
 184        switch (bpp) {
 185        case 8:
 186                return (v >> 4);
 187        case 16:
 188                return (v >> 3);
 189        case 32:
 190                return (v >> 2);
 191        }
 192        DPRINTK("Unsupported depth %u\n", bpp);
 193        return 0;
 194}
 195
 196/* acceleration */
 197static int pm3fb_sync(struct fb_info *info)
 198{
 199        struct pm3_par *par = info->par;
 200
 201        PM3_WAIT(par, 2);
 202        PM3_WRITE_REG(par, PM3FilterMode, PM3FilterModeSync);
 203        PM3_WRITE_REG(par, PM3Sync, 0);
 204        mb();
 205        do {
 206                while ((PM3_READ_REG(par, PM3OutFIFOWords)) == 0)
 207                        cpu_relax();
 208        } while ((PM3_READ_REG(par, PM3OutputFifo)) != PM3Sync_Tag);
 209
 210        return 0;
 211}
 212
 213static void pm3fb_init_engine(struct fb_info *info)
 214{
 215        struct pm3_par *par = info->par;
 216        const u32 width = (info->var.xres_virtual + 7) & ~7;
 217
 218        PM3_WAIT(par, 50);
 219        PM3_WRITE_REG(par, PM3FilterMode, PM3FilterModeSync);
 220        PM3_WRITE_REG(par, PM3StatisticMode, 0x0);
 221        PM3_WRITE_REG(par, PM3DeltaMode, 0x0);
 222        PM3_WRITE_REG(par, PM3RasterizerMode, 0x0);
 223        PM3_WRITE_REG(par, PM3ScissorMode, 0x0);
 224        PM3_WRITE_REG(par, PM3LineStippleMode, 0x0);
 225        PM3_WRITE_REG(par, PM3AreaStippleMode, 0x0);
 226        PM3_WRITE_REG(par, PM3GIDMode, 0x0);
 227        PM3_WRITE_REG(par, PM3DepthMode, 0x0);
 228        PM3_WRITE_REG(par, PM3StencilMode, 0x0);
 229        PM3_WRITE_REG(par, PM3StencilData, 0x0);
 230        PM3_WRITE_REG(par, PM3ColorDDAMode, 0x0);
 231        PM3_WRITE_REG(par, PM3TextureCoordMode, 0x0);
 232        PM3_WRITE_REG(par, PM3TextureIndexMode0, 0x0);
 233        PM3_WRITE_REG(par, PM3TextureIndexMode1, 0x0);
 234        PM3_WRITE_REG(par, PM3TextureReadMode, 0x0);
 235        PM3_WRITE_REG(par, PM3LUTMode, 0x0);
 236        PM3_WRITE_REG(par, PM3TextureFilterMode, 0x0);
 237        PM3_WRITE_REG(par, PM3TextureCompositeMode, 0x0);
 238        PM3_WRITE_REG(par, PM3TextureApplicationMode, 0x0);
 239        PM3_WRITE_REG(par, PM3TextureCompositeColorMode1, 0x0);
 240        PM3_WRITE_REG(par, PM3TextureCompositeAlphaMode1, 0x0);
 241        PM3_WRITE_REG(par, PM3TextureCompositeColorMode0, 0x0);
 242        PM3_WRITE_REG(par, PM3TextureCompositeAlphaMode0, 0x0);
 243        PM3_WRITE_REG(par, PM3FogMode, 0x0);
 244        PM3_WRITE_REG(par, PM3ChromaTestMode, 0x0);
 245        PM3_WRITE_REG(par, PM3AlphaTestMode, 0x0);
 246        PM3_WRITE_REG(par, PM3AntialiasMode, 0x0);
 247        PM3_WRITE_REG(par, PM3YUVMode, 0x0);
 248        PM3_WRITE_REG(par, PM3AlphaBlendColorMode, 0x0);
 249        PM3_WRITE_REG(par, PM3AlphaBlendAlphaMode, 0x0);
 250        PM3_WRITE_REG(par, PM3DitherMode, 0x0);
 251        PM3_WRITE_REG(par, PM3LogicalOpMode, 0x0);
 252        PM3_WRITE_REG(par, PM3RouterMode, 0x0);
 253        PM3_WRITE_REG(par, PM3Window, 0x0);
 254
 255        PM3_WRITE_REG(par, PM3Config2D, 0x0);
 256
 257        PM3_WRITE_REG(par, PM3SpanColorMask, 0xffffffff);
 258
 259        PM3_WRITE_REG(par, PM3XBias, 0x0);
 260        PM3_WRITE_REG(par, PM3YBias, 0x0);
 261        PM3_WRITE_REG(par, PM3DeltaControl, 0x0);
 262
 263        PM3_WRITE_REG(par, PM3BitMaskPattern, 0xffffffff);
 264
 265        PM3_WRITE_REG(par, PM3FBDestReadEnables,
 266                           PM3FBDestReadEnables_E(0xff) |
 267                           PM3FBDestReadEnables_R(0xff) |
 268                           PM3FBDestReadEnables_ReferenceAlpha(0xff));
 269        PM3_WRITE_REG(par, PM3FBDestReadBufferAddr0, 0x0);
 270        PM3_WRITE_REG(par, PM3FBDestReadBufferOffset0, 0x0);
 271        PM3_WRITE_REG(par, PM3FBDestReadBufferWidth0,
 272                           PM3FBDestReadBufferWidth_Width(width));
 273
 274        PM3_WRITE_REG(par, PM3FBDestReadMode,
 275                           PM3FBDestReadMode_ReadEnable |
 276                           PM3FBDestReadMode_Enable0);
 277        PM3_WRITE_REG(par, PM3FBSourceReadBufferAddr, 0x0);
 278        PM3_WRITE_REG(par, PM3FBSourceReadBufferOffset, 0x0);
 279        PM3_WRITE_REG(par, PM3FBSourceReadBufferWidth,
 280                           PM3FBSourceReadBufferWidth_Width(width));
 281        PM3_WRITE_REG(par, PM3FBSourceReadMode,
 282                           PM3FBSourceReadMode_Blocking |
 283                           PM3FBSourceReadMode_ReadEnable);
 284
 285        PM3_WAIT(par, 2);
 286        {
 287                /* invert bits in bitmask */
 288                unsigned long rm = 1 | (3 << 7);
 289                switch (info->var.bits_per_pixel) {
 290                case 8:
 291                        PM3_WRITE_REG(par, PM3PixelSize,
 292                                           PM3PixelSize_GLOBAL_8BIT);
 293#ifdef __BIG_ENDIAN
 294                        rm |= 3 << 15;
 295#endif
 296                        break;
 297                case 16:
 298                        PM3_WRITE_REG(par, PM3PixelSize,
 299                                           PM3PixelSize_GLOBAL_16BIT);
 300#ifdef __BIG_ENDIAN
 301                        rm |= 2 << 15;
 302#endif
 303                        break;
 304                case 32:
 305                        PM3_WRITE_REG(par, PM3PixelSize,
 306                                           PM3PixelSize_GLOBAL_32BIT);
 307                        break;
 308                default:
 309                        DPRINTK(1, "Unsupported depth %d\n",
 310                                info->var.bits_per_pixel);
 311                        break;
 312                }
 313                PM3_WRITE_REG(par, PM3RasterizerMode, rm);
 314        }
 315
 316        PM3_WAIT(par, 20);
 317        PM3_WRITE_REG(par, PM3FBSoftwareWriteMask, 0xffffffff);
 318        PM3_WRITE_REG(par, PM3FBHardwareWriteMask, 0xffffffff);
 319        PM3_WRITE_REG(par, PM3FBWriteMode,
 320                           PM3FBWriteMode_WriteEnable |
 321                           PM3FBWriteMode_OpaqueSpan |
 322                           PM3FBWriteMode_Enable0);
 323        PM3_WRITE_REG(par, PM3FBWriteBufferAddr0, 0x0);
 324        PM3_WRITE_REG(par, PM3FBWriteBufferOffset0, 0x0);
 325        PM3_WRITE_REG(par, PM3FBWriteBufferWidth0,
 326                           PM3FBWriteBufferWidth_Width(width));
 327
 328        PM3_WRITE_REG(par, PM3SizeOfFramebuffer, 0x0);
 329        {
 330                /* size in lines of FB */
 331                unsigned long sofb = info->screen_size /
 332                        info->fix.line_length;
 333                if (sofb > 4095)
 334                        PM3_WRITE_REG(par, PM3SizeOfFramebuffer, 4095);
 335                else
 336                        PM3_WRITE_REG(par, PM3SizeOfFramebuffer, sofb);
 337
 338                switch (info->var.bits_per_pixel) {
 339                case 8:
 340                        PM3_WRITE_REG(par, PM3DitherMode,
 341                                           (1 << 10) | (2 << 3));
 342                        break;
 343                case 16:
 344                        PM3_WRITE_REG(par, PM3DitherMode,
 345                                           (1 << 10) | (1 << 3));
 346                        break;
 347                case 32:
 348                        PM3_WRITE_REG(par, PM3DitherMode,
 349                                           (1 << 10) | (0 << 3));
 350                        break;
 351                default:
 352                        DPRINTK(1, "Unsupported depth %d\n",
 353                                info->current_par->depth);
 354                        break;
 355                }
 356        }
 357
 358        PM3_WRITE_REG(par, PM3dXDom, 0x0);
 359        PM3_WRITE_REG(par, PM3dXSub, 0x0);
 360        PM3_WRITE_REG(par, PM3dY, 1 << 16);
 361        PM3_WRITE_REG(par, PM3StartXDom, 0x0);
 362        PM3_WRITE_REG(par, PM3StartXSub, 0x0);
 363        PM3_WRITE_REG(par, PM3StartY, 0x0);
 364        PM3_WRITE_REG(par, PM3Count, 0x0);
 365
 366/* Disable LocalBuffer. better safe than sorry */
 367        PM3_WRITE_REG(par, PM3LBDestReadMode, 0x0);
 368        PM3_WRITE_REG(par, PM3LBDestReadEnables, 0x0);
 369        PM3_WRITE_REG(par, PM3LBSourceReadMode, 0x0);
 370        PM3_WRITE_REG(par, PM3LBWriteMode, 0x0);
 371
 372        pm3fb_sync(info);
 373}
 374
 375static void pm3fb_fillrect(struct fb_info *info,
 376                                const struct fb_fillrect *region)
 377{
 378        struct pm3_par *par = info->par;
 379        struct fb_fillrect modded;
 380        int vxres, vyres;
 381        int rop;
 382        u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
 383                ((u32 *)info->pseudo_palette)[region->color] : region->color;
 384
 385        if (info->state != FBINFO_STATE_RUNNING)
 386                return;
 387        if (info->flags & FBINFO_HWACCEL_DISABLED) {
 388                cfb_fillrect(info, region);
 389                return;
 390        }
 391        if (region->rop == ROP_COPY )
 392                rop = PM3Config2D_ForegroundROP(0x3); /* GXcopy */
 393        else
 394                rop = PM3Config2D_ForegroundROP(0x6) | /* GXxor */
 395                        PM3Config2D_FBDestReadEnable;
 396
 397        vxres = info->var.xres_virtual;
 398        vyres = info->var.yres_virtual;
 399
 400        memcpy(&modded, region, sizeof(struct fb_fillrect));
 401
 402        if (!modded.width || !modded.height ||
 403            modded.dx >= vxres || modded.dy >= vyres)
 404                return;
 405
 406        if (modded.dx + modded.width  > vxres)
 407                modded.width  = vxres - modded.dx;
 408        if (modded.dy + modded.height > vyres)
 409                modded.height = vyres - modded.dy;
 410
 411        if (info->var.bits_per_pixel == 8)
 412                color |= color << 8;
 413        if (info->var.bits_per_pixel <= 16)
 414                color |= color << 16;
 415
 416        PM3_WAIT(par, 4);
 417        /* ROP Ox3 is GXcopy */
 418        PM3_WRITE_REG(par, PM3Config2D,
 419                        PM3Config2D_UseConstantSource |
 420                        PM3Config2D_ForegroundROPEnable |
 421                        rop |
 422                        PM3Config2D_FBWriteEnable);
 423
 424        PM3_WRITE_REG(par, PM3ForegroundColor, color);
 425
 426        PM3_WRITE_REG(par, PM3RectanglePosition,
 427                        PM3RectanglePosition_XOffset(modded.dx) |
 428                        PM3RectanglePosition_YOffset(modded.dy));
 429
 430        PM3_WRITE_REG(par, PM3Render2D,
 431                      PM3Render2D_XPositive |
 432                      PM3Render2D_YPositive |
 433                      PM3Render2D_Operation_Normal |
 434                      PM3Render2D_SpanOperation |
 435                      PM3Render2D_Width(modded.width) |
 436                      PM3Render2D_Height(modded.height));
 437}
 438
 439static void pm3fb_copyarea(struct fb_info *info,
 440                                const struct fb_copyarea *area)
 441{
 442        struct pm3_par *par = info->par;
 443        struct fb_copyarea modded;
 444        u32 vxres, vyres;
 445        int x_align, o_x, o_y;
 446
 447        if (info->state != FBINFO_STATE_RUNNING)
 448                return;
 449        if (info->flags & FBINFO_HWACCEL_DISABLED) {
 450                cfb_copyarea(info, area);
 451                return;
 452        }
 453
 454        memcpy(&modded, area, sizeof(struct fb_copyarea));
 455
 456        vxres = info->var.xres_virtual;
 457        vyres = info->var.yres_virtual;
 458
 459        if (!modded.width || !modded.height ||
 460            modded.sx >= vxres || modded.sy >= vyres ||
 461            modded.dx >= vxres || modded.dy >= vyres)
 462                return;
 463
 464        if (modded.sx + modded.width > vxres)
 465                modded.width = vxres - modded.sx;
 466        if (modded.dx + modded.width > vxres)
 467                modded.width = vxres - modded.dx;
 468        if (modded.sy + modded.height > vyres)
 469                modded.height = vyres - modded.sy;
 470        if (modded.dy + modded.height > vyres)
 471                modded.height = vyres - modded.dy;
 472
 473        o_x = modded.sx - modded.dx;    /*(sx > dx ) ? (sx - dx) : (dx - sx); */
 474        o_y = modded.sy - modded.dy;    /*(sy > dy ) ? (sy - dy) : (dy - sy); */
 475
 476        x_align = (modded.sx & 0x1f);
 477
 478        PM3_WAIT(par, 6);
 479
 480        PM3_WRITE_REG(par, PM3Config2D,
 481                        PM3Config2D_UserScissorEnable |
 482                        PM3Config2D_ForegroundROPEnable |
 483                        PM3Config2D_Blocking |
 484                        PM3Config2D_ForegroundROP(0x3) | /* Ox3 is GXcopy */
 485                        PM3Config2D_FBWriteEnable);
 486
 487        PM3_WRITE_REG(par, PM3ScissorMinXY,
 488                        ((modded.dy & 0x0fff) << 16) | (modded.dx & 0x0fff));
 489        PM3_WRITE_REG(par, PM3ScissorMaxXY,
 490                        (((modded.dy + modded.height) & 0x0fff) << 16) |
 491                        ((modded.dx + modded.width) & 0x0fff));
 492
 493        PM3_WRITE_REG(par, PM3FBSourceReadBufferOffset,
 494                        PM3FBSourceReadBufferOffset_XOffset(o_x) |
 495                        PM3FBSourceReadBufferOffset_YOffset(o_y));
 496
 497        PM3_WRITE_REG(par, PM3RectanglePosition,
 498                        PM3RectanglePosition_XOffset(modded.dx - x_align) |
 499                        PM3RectanglePosition_YOffset(modded.dy));
 500
 501        PM3_WRITE_REG(par, PM3Render2D,
 502                        ((modded.sx > modded.dx) ? PM3Render2D_XPositive : 0) |
 503                        ((modded.sy > modded.dy) ? PM3Render2D_YPositive : 0) |
 504                        PM3Render2D_Operation_Normal |
 505                        PM3Render2D_SpanOperation |
 506                        PM3Render2D_FBSourceReadEnable |
 507                        PM3Render2D_Width(modded.width + x_align) |
 508                        PM3Render2D_Height(modded.height));
 509}
 510
 511static void pm3fb_imageblit(struct fb_info *info, const struct fb_image *image)
 512{
 513        struct pm3_par *par = info->par;
 514        u32 height = image->height;
 515        u32 fgx, bgx;
 516        const u32 *src = (const u32 *)image->data;
 517
 518        if (info->state != FBINFO_STATE_RUNNING)
 519                return;
 520        if (info->flags & FBINFO_HWACCEL_DISABLED) {
 521                cfb_imageblit(info, image);
 522                return;
 523        }
 524        switch (info->fix.visual) {
 525        case FB_VISUAL_PSEUDOCOLOR:
 526                fgx = image->fg_color;
 527                bgx = image->bg_color;
 528                break;
 529        case FB_VISUAL_TRUECOLOR:
 530        default:
 531                fgx = par->palette[image->fg_color];
 532                bgx = par->palette[image->bg_color];
 533                break;
 534        }
 535        if (image->depth != 1) {
 536                cfb_imageblit(info, image);
 537                return;
 538        }
 539
 540        if (info->var.bits_per_pixel == 8) {
 541                fgx |= fgx << 8;
 542                bgx |= bgx << 8;
 543        }
 544        if (info->var.bits_per_pixel <= 16) {
 545                fgx |= fgx << 16;
 546                bgx |= bgx << 16;
 547        }
 548
 549        PM3_WAIT(par, 7);
 550
 551        PM3_WRITE_REG(par, PM3ForegroundColor, fgx);
 552        PM3_WRITE_REG(par, PM3BackgroundColor, bgx);
 553
 554        /* ROP Ox3 is GXcopy */
 555        PM3_WRITE_REG(par, PM3Config2D,
 556                        PM3Config2D_UserScissorEnable |
 557                        PM3Config2D_UseConstantSource |
 558                        PM3Config2D_ForegroundROPEnable |
 559                        PM3Config2D_ForegroundROP(0x3) |
 560                        PM3Config2D_OpaqueSpan |
 561                        PM3Config2D_FBWriteEnable);
 562        PM3_WRITE_REG(par, PM3ScissorMinXY,
 563                        ((image->dy & 0x0fff) << 16) | (image->dx & 0x0fff));
 564        PM3_WRITE_REG(par, PM3ScissorMaxXY,
 565                        (((image->dy + image->height) & 0x0fff) << 16) |
 566                        ((image->dx + image->width) & 0x0fff));
 567        PM3_WRITE_REG(par, PM3RectanglePosition,
 568                        PM3RectanglePosition_XOffset(image->dx) |
 569                        PM3RectanglePosition_YOffset(image->dy));
 570        PM3_WRITE_REG(par, PM3Render2D,
 571                        PM3Render2D_XPositive |
 572                        PM3Render2D_YPositive |
 573                        PM3Render2D_Operation_SyncOnBitMask |
 574                        PM3Render2D_SpanOperation |
 575                        PM3Render2D_Width(image->width) |
 576                        PM3Render2D_Height(image->height));
 577
 578
 579        while (height--) {
 580                int width = ((image->width + 7) >> 3)
 581                                + info->pixmap.scan_align - 1;
 582                width >>= 2;
 583
 584                while (width >= PM3_FIFO_SIZE) {
 585                        int i = PM3_FIFO_SIZE - 1;
 586
 587                        PM3_WAIT(par, PM3_FIFO_SIZE);
 588                        while (i--) {
 589                                PM3_WRITE_REG(par, PM3BitMaskPattern, *src);
 590                                src++;
 591                        }
 592                        width -= PM3_FIFO_SIZE - 1;
 593                }
 594
 595                PM3_WAIT(par, width + 1);
 596                while (width--) {
 597                        PM3_WRITE_REG(par, PM3BitMaskPattern, *src);
 598                        src++;
 599                }
 600        }
 601}
 602/* end of acceleration functions */
 603
 604/*
 605 *      Hardware Cursor support.
 606 */
 607static const u8 cursor_bits_lookup[16] = {
 608        0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
 609        0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
 610};
 611
 612static int pm3fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 613{
 614        struct pm3_par *par = info->par;
 615        u8 mode;
 616
 617        if (!hwcursor)
 618                return -EINVAL; /* just to force soft_cursor() call */
 619
 620        /* Too large of a cursor or wrong bpp :-( */
 621        if (cursor->image.width > 64 ||
 622            cursor->image.height > 64 ||
 623            cursor->image.depth > 1)
 624                return -EINVAL;
 625
 626        mode = PM3RD_CursorMode_TYPE_X;
 627        if (cursor->enable)
 628                 mode |= PM3RD_CursorMode_CURSOR_ENABLE;
 629
 630        PM3_WRITE_DAC_REG(par, PM3RD_CursorMode, mode);
 631
 632        /*
 633         * If the cursor is not be changed this means either we want the
 634         * current cursor state (if enable is set) or we want to query what
 635         * we can do with the cursor (if enable is not set)
 636         */
 637        if (!cursor->set)
 638                return 0;
 639
 640        if (cursor->set & FB_CUR_SETPOS) {
 641                int x = cursor->image.dx - info->var.xoffset;
 642                int y = cursor->image.dy - info->var.yoffset;
 643
 644                PM3_WRITE_DAC_REG(par, PM3RD_CursorXLow, x & 0xff);
 645                PM3_WRITE_DAC_REG(par, PM3RD_CursorXHigh, (x >> 8) & 0xf);
 646                PM3_WRITE_DAC_REG(par, PM3RD_CursorYLow, y & 0xff);
 647                PM3_WRITE_DAC_REG(par, PM3RD_CursorYHigh, (y >> 8) & 0xf);
 648        }
 649
 650        if (cursor->set & FB_CUR_SETHOT) {
 651                PM3_WRITE_DAC_REG(par, PM3RD_CursorHotSpotX,
 652                                  cursor->hot.x & 0x3f);
 653                PM3_WRITE_DAC_REG(par, PM3RD_CursorHotSpotY,
 654                                  cursor->hot.y & 0x3f);
 655        }
 656
 657        if (cursor->set & FB_CUR_SETCMAP) {
 658                u32 fg_idx = cursor->image.fg_color;
 659                u32 bg_idx = cursor->image.bg_color;
 660                struct fb_cmap cmap = info->cmap;
 661
 662                /* the X11 driver says one should use these color registers */
 663                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(39),
 664                                  cmap.red[fg_idx] >> 8 );
 665                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(40),
 666                                  cmap.green[fg_idx] >> 8 );
 667                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(41),
 668                                  cmap.blue[fg_idx] >> 8 );
 669
 670                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(42),
 671                                  cmap.red[bg_idx] >> 8 );
 672                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(43),
 673                                  cmap.green[bg_idx] >> 8 );
 674                PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(44),
 675                                  cmap.blue[bg_idx] >> 8 );
 676        }
 677
 678        if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
 679                u8 *bitmap = (u8 *)cursor->image.data;
 680                u8 *mask = (u8 *)cursor->mask;
 681                int i;
 682                int pos = PM3RD_CursorPattern(0);
 683
 684                for (i = 0; i < cursor->image.height; i++) {
 685                        int j = (cursor->image.width + 7) >> 3;
 686                        int k = 8 - j;
 687
 688                        for (; j > 0; j--) {
 689                                u8 data = *bitmap ^ *mask;
 690
 691                                if (cursor->rop == ROP_COPY)
 692                                        data = *mask & *bitmap;
 693                                /* Upper 4 bits of bitmap data */
 694                                PM3_WRITE_DAC_REG(par, pos++,
 695                                        cursor_bits_lookup[data >> 4] |
 696                                        (cursor_bits_lookup[*mask >> 4] << 1));
 697                                /* Lower 4 bits of bitmap */
 698                                PM3_WRITE_DAC_REG(par, pos++,
 699                                        cursor_bits_lookup[data & 0xf] |
 700                                        (cursor_bits_lookup[*mask & 0xf] << 1));
 701                                bitmap++;
 702                                mask++;
 703                        }
 704                        for (; k > 0; k--) {
 705                                PM3_WRITE_DAC_REG(par, pos++, 0);
 706                                PM3_WRITE_DAC_REG(par, pos++, 0);
 707                        }
 708                }
 709                while (pos < PM3RD_CursorPattern(1024))
 710                        PM3_WRITE_DAC_REG(par, pos++, 0);
 711        }
 712        return 0;
 713}
 714
 715/* write the mode to registers */
 716static void pm3fb_write_mode(struct fb_info *info)
 717{
 718        struct pm3_par *par = info->par;
 719        char tempsync = 0x00;
 720        char tempmisc = 0x00;
 721        const u32 hsstart = info->var.right_margin;
 722        const u32 hsend = hsstart + info->var.hsync_len;
 723        const u32 hbend = hsend + info->var.left_margin;
 724        const u32 xres = (info->var.xres + 31) & ~31;
 725        const u32 htotal = xres + hbend;
 726        const u32 vsstart = info->var.lower_margin;
 727        const u32 vsend = vsstart + info->var.vsync_len;
 728        const u32 vbend = vsend + info->var.upper_margin;
 729        const u32 vtotal = info->var.yres + vbend;
 730        const u32 width = (info->var.xres_virtual + 7) & ~7;
 731        const unsigned bpp = info->var.bits_per_pixel;
 732
 733        PM3_WAIT(par, 20);
 734        PM3_WRITE_REG(par, PM3MemBypassWriteMask, 0xffffffff);
 735        PM3_WRITE_REG(par, PM3Aperture0, 0x00000000);
 736        PM3_WRITE_REG(par, PM3Aperture1, 0x00000000);
 737        PM3_WRITE_REG(par, PM3FIFODis, 0x00000007);
 738
 739        PM3_WRITE_REG(par, PM3HTotal,
 740                           pm3fb_shift_bpp(bpp, htotal - 1));
 741        PM3_WRITE_REG(par, PM3HsEnd,
 742                           pm3fb_shift_bpp(bpp, hsend));
 743        PM3_WRITE_REG(par, PM3HsStart,
 744                           pm3fb_shift_bpp(bpp, hsstart));
 745        PM3_WRITE_REG(par, PM3HbEnd,
 746                           pm3fb_shift_bpp(bpp, hbend));
 747        PM3_WRITE_REG(par, PM3HgEnd,
 748                           pm3fb_shift_bpp(bpp, hbend));
 749        PM3_WRITE_REG(par, PM3ScreenStride,
 750                           pm3fb_shift_bpp(bpp, width));
 751        PM3_WRITE_REG(par, PM3VTotal, vtotal - 1);
 752        PM3_WRITE_REG(par, PM3VsEnd, vsend - 1);
 753        PM3_WRITE_REG(par, PM3VsStart, vsstart - 1);
 754        PM3_WRITE_REG(par, PM3VbEnd, vbend);
 755
 756        switch (bpp) {
 757        case 8:
 758                PM3_WRITE_REG(par, PM3ByAperture1Mode,
 759                                   PM3ByApertureMode_PIXELSIZE_8BIT);
 760                PM3_WRITE_REG(par, PM3ByAperture2Mode,
 761                                   PM3ByApertureMode_PIXELSIZE_8BIT);
 762                break;
 763
 764        case 16:
 765#ifndef __BIG_ENDIAN
 766                PM3_WRITE_REG(par, PM3ByAperture1Mode,
 767                                   PM3ByApertureMode_PIXELSIZE_16BIT);
 768                PM3_WRITE_REG(par, PM3ByAperture2Mode,
 769                                   PM3ByApertureMode_PIXELSIZE_16BIT);
 770#else
 771                PM3_WRITE_REG(par, PM3ByAperture1Mode,
 772                                   PM3ByApertureMode_PIXELSIZE_16BIT |
 773                                   PM3ByApertureMode_BYTESWAP_BADC);
 774                PM3_WRITE_REG(par, PM3ByAperture2Mode,
 775                                   PM3ByApertureMode_PIXELSIZE_16BIT |
 776                                   PM3ByApertureMode_BYTESWAP_BADC);
 777#endif /* ! __BIG_ENDIAN */
 778                break;
 779
 780        case 32:
 781#ifndef __BIG_ENDIAN
 782                PM3_WRITE_REG(par, PM3ByAperture1Mode,
 783                                   PM3ByApertureMode_PIXELSIZE_32BIT);
 784                PM3_WRITE_REG(par, PM3ByAperture2Mode,
 785                                   PM3ByApertureMode_PIXELSIZE_32BIT);
 786#else
 787                PM3_WRITE_REG(par, PM3ByAperture1Mode,
 788                                   PM3ByApertureMode_PIXELSIZE_32BIT |
 789                                   PM3ByApertureMode_BYTESWAP_DCBA);
 790                PM3_WRITE_REG(par, PM3ByAperture2Mode,
 791                                   PM3ByApertureMode_PIXELSIZE_32BIT |
 792                                   PM3ByApertureMode_BYTESWAP_DCBA);
 793#endif /* ! __BIG_ENDIAN */
 794                break;
 795
 796        default:
 797                DPRINTK("Unsupported depth %d\n", bpp);
 798                break;
 799        }
 800
 801        /*
 802         * Oxygen VX1 - it appears that setting PM3VideoControl and
 803         * then PM3RD_SyncControl to the same SYNC settings undoes
 804         * any net change - they seem to xor together.  Only set the
 805         * sync options in PM3RD_SyncControl.  --rmk
 806         */
 807        {
 808                unsigned int video = par->video;
 809
 810                video &= ~(PM3VideoControl_HSYNC_MASK |
 811                           PM3VideoControl_VSYNC_MASK);
 812                video |= PM3VideoControl_HSYNC_ACTIVE_HIGH |
 813                         PM3VideoControl_VSYNC_ACTIVE_HIGH;
 814                PM3_WRITE_REG(par, PM3VideoControl, video);
 815        }
 816        PM3_WRITE_REG(par, PM3VClkCtl,
 817                           (PM3_READ_REG(par, PM3VClkCtl) & 0xFFFFFFFC));
 818        PM3_WRITE_REG(par, PM3ScreenBase, par->base);
 819        PM3_WRITE_REG(par, PM3ChipConfig,
 820                           (PM3_READ_REG(par, PM3ChipConfig) & 0xFFFFFFFD));
 821
 822        wmb();
 823        {
 824                unsigned char uninitialized_var(m);     /* ClkPreScale */
 825                unsigned char uninitialized_var(n);     /* ClkFeedBackScale */
 826                unsigned char uninitialized_var(p);     /* ClkPostScale */
 827                unsigned long pixclock = PICOS2KHZ(info->var.pixclock);
 828
 829                (void)pm3fb_calculate_clock(pixclock, &m, &n, &p);
 830
 831                DPRINTK("Pixclock: %ld, Pre: %d, Feedback: %d, Post: %d\n",
 832                        pixclock, (int) m, (int) n, (int) p);
 833
 834                PM3_WRITE_DAC_REG(par, PM3RD_DClk0PreScale, m);
 835                PM3_WRITE_DAC_REG(par, PM3RD_DClk0FeedbackScale, n);
 836                PM3_WRITE_DAC_REG(par, PM3RD_DClk0PostScale, p);
 837        }
 838        /*
 839           PM3_WRITE_DAC_REG(par, PM3RD_IndexControl, 0x00);
 840         */
 841        /*
 842           PM3_SLOW_WRITE_REG(par, PM3RD_IndexControl, 0x00);
 843         */
 844        if ((par->video & PM3VideoControl_HSYNC_MASK) ==
 845            PM3VideoControl_HSYNC_ACTIVE_HIGH)
 846                tempsync |= PM3RD_SyncControl_HSYNC_ACTIVE_HIGH;
 847        if ((par->video & PM3VideoControl_VSYNC_MASK) ==
 848            PM3VideoControl_VSYNC_ACTIVE_HIGH)
 849                tempsync |= PM3RD_SyncControl_VSYNC_ACTIVE_HIGH;
 850
 851        PM3_WRITE_DAC_REG(par, PM3RD_SyncControl, tempsync);
 852        DPRINTK("PM3RD_SyncControl: %d\n", tempsync);
 853
 854        PM3_WRITE_DAC_REG(par, PM3RD_DACControl, 0x00);
 855
 856        switch (pm3fb_depth(&info->var)) {
 857        case 8:
 858                PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
 859                                  PM3RD_PixelSize_8_BIT_PIXELS);
 860                PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
 861                                  PM3RD_ColorFormat_CI8_COLOR |
 862                                  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW);
 863                tempmisc |= PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
 864                break;
 865        case 12:
 866                PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
 867                                  PM3RD_PixelSize_16_BIT_PIXELS);
 868                PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
 869                                  PM3RD_ColorFormat_4444_COLOR |
 870                                  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
 871                                  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
 872                tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
 873                        PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
 874                break;
 875        case 15:
 876                PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
 877                                  PM3RD_PixelSize_16_BIT_PIXELS);
 878                PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
 879                                  PM3RD_ColorFormat_5551_FRONT_COLOR |
 880                                  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
 881                                  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
 882                tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
 883                        PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
 884                break;
 885        case 16:
 886                PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
 887                                  PM3RD_PixelSize_16_BIT_PIXELS);
 888                PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
 889                                  PM3RD_ColorFormat_565_FRONT_COLOR |
 890                                  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
 891                                  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
 892                tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
 893                        PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
 894                break;
 895        case 32:
 896                PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
 897                                  PM3RD_PixelSize_32_BIT_PIXELS);
 898                PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
 899                                  PM3RD_ColorFormat_8888_COLOR |
 900                                  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW);
 901                tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
 902                        PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
 903                break;
 904        }
 905        PM3_WRITE_DAC_REG(par, PM3RD_MiscControl, tempmisc);
 906}
 907
 908/*
 909 * hardware independent functions
 910 */
 911static int pm3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 912{
 913        u32 lpitch;
 914        unsigned bpp = var->red.length + var->green.length
 915                        + var->blue.length + var->transp.length;
 916
 917        if (bpp != var->bits_per_pixel) {
 918                /* set predefined mode for bits_per_pixel settings */
 919
 920                switch (var->bits_per_pixel) {
 921                case 8:
 922                        var->red.length = 8;
 923                        var->green.length = 8;
 924                        var->blue.length = 8;
 925                        var->red.offset = 0;
 926                        var->green.offset = 0;
 927                        var->blue.offset = 0;
 928                        var->transp.offset = 0;
 929                        var->transp.length = 0;
 930                        break;
 931                case 16:
 932                        var->red.length = 5;
 933                        var->blue.length = 5;
 934                        var->green.length = 6;
 935                        var->transp.length = 0;
 936                        break;
 937                case 32:
 938                        var->red.length = 8;
 939                        var->green.length = 8;
 940                        var->blue.length = 8;
 941                        var->transp.length = 8;
 942                        break;
 943                default:
 944                        DPRINTK("depth not supported: %u\n",
 945                                var->bits_per_pixel);
 946                        return -EINVAL;
 947                }
 948        }
 949        /* it is assumed BGRA order */
 950        if (var->bits_per_pixel > 8 ) {
 951                var->blue.offset = 0;
 952                var->green.offset = var->blue.length;
 953                var->red.offset = var->green.offset + var->green.length;
 954                var->transp.offset = var->red.offset + var->red.length;
 955        }
 956        var->height = -1;
 957        var->width = -1;
 958
 959        if (var->xres != var->xres_virtual) {
 960                DPRINTK("virtual x resolution != "
 961                        "physical x resolution not supported\n");
 962                return -EINVAL;
 963        }
 964
 965        if (var->yres > var->yres_virtual) {
 966                DPRINTK("virtual y resolution < "
 967                        "physical y resolution not possible\n");
 968                return -EINVAL;
 969        }
 970
 971        if (var->xoffset) {
 972                DPRINTK("xoffset not supported\n");
 973                return -EINVAL;
 974        }
 975
 976        if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
 977                DPRINTK("interlace not supported\n");
 978                return -EINVAL;
 979        }
 980
 981        var->xres = (var->xres + 31) & ~31; /* could sometimes be 8 */
 982        lpitch = var->xres * ((var->bits_per_pixel + 7) >> 3);
 983
 984        if (var->xres < 200 || var->xres > 2048) {
 985                DPRINTK("width not supported: %u\n", var->xres);
 986                return -EINVAL;
 987        }
 988
 989        if (var->yres < 200 || var->yres > 4095) {
 990                DPRINTK("height not supported: %u\n", var->yres);
 991                return -EINVAL;
 992        }
 993
 994        if (lpitch * var->yres_virtual > info->fix.smem_len) {
 995                DPRINTK("no memory for screen (%ux%ux%u)\n",
 996                        var->xres, var->yres_virtual, var->bits_per_pixel);
 997                return -EINVAL;
 998        }
 999
1000        if (PICOS2KHZ(var->pixclock) > PM3_MAX_PIXCLOCK) {
1001                DPRINTK("pixclock too high (%ldKHz)\n",
1002                        PICOS2KHZ(var->pixclock));
1003                return -EINVAL;
1004        }
1005
1006        var->accel_flags = 0;   /* Can't mmap if this is on */
1007
1008        DPRINTK("Checking graphics mode at %dx%d depth %d\n",
1009                var->xres, var->yres, var->bits_per_pixel);
1010        return 0;
1011}
1012
1013static int pm3fb_set_par(struct fb_info *info)
1014{
1015        struct pm3_par *par = info->par;
1016        const u32 xres = (info->var.xres + 31) & ~31;
1017        const unsigned bpp = info->var.bits_per_pixel;
1018
1019        par->base = pm3fb_shift_bpp(bpp, (info->var.yoffset * xres)
1020                                        + info->var.xoffset);
1021        par->video = 0;
1022
1023        if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
1024                par->video |= PM3VideoControl_HSYNC_ACTIVE_HIGH;
1025        else
1026                par->video |= PM3VideoControl_HSYNC_ACTIVE_LOW;
1027
1028        if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
1029                par->video |= PM3VideoControl_VSYNC_ACTIVE_HIGH;
1030        else
1031                par->video |= PM3VideoControl_VSYNC_ACTIVE_LOW;
1032
1033        if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE)
1034                par->video |= PM3VideoControl_LINE_DOUBLE_ON;
1035
1036        if ((info->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
1037                par->video |= PM3VideoControl_ENABLE;
1038        else
1039                DPRINTK("PM3Video disabled\n");
1040
1041        switch (bpp) {
1042        case 8:
1043                par->video |= PM3VideoControl_PIXELSIZE_8BIT;
1044                break;
1045        case 16:
1046                par->video |= PM3VideoControl_PIXELSIZE_16BIT;
1047                break;
1048        case 32:
1049                par->video |= PM3VideoControl_PIXELSIZE_32BIT;
1050                break;
1051        default:
1052                DPRINTK("Unsupported depth\n");
1053                break;
1054        }
1055
1056        info->fix.visual =
1057                (bpp == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1058        info->fix.line_length = ((info->var.xres_virtual + 7)  >> 3) * bpp;
1059
1060/*      pm3fb_clear_memory(info, 0);*/
1061        pm3fb_clear_colormap(par, 0, 0, 0);
1062        PM3_WRITE_DAC_REG(par, PM3RD_CursorMode, 0);
1063        pm3fb_init_engine(info);
1064        pm3fb_write_mode(info);
1065        return 0;
1066}
1067
1068static int pm3fb_setcolreg(unsigned regno, unsigned red, unsigned green,
1069                           unsigned blue, unsigned transp,
1070                           struct fb_info *info)
1071{
1072        struct pm3_par *par = info->par;
1073
1074        if (regno >= 256)  /* no. of hw registers */
1075           return -EINVAL;
1076
1077        /* grayscale works only partially under directcolor */
1078        /* grayscale = 0.30*R + 0.59*G + 0.11*B */
1079        if (info->var.grayscale)
1080           red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
1081
1082        /* Directcolor:
1083         *   var->{color}.offset contains start of bitfield
1084         *   var->{color}.length contains length of bitfield
1085         *   {hardwarespecific} contains width of DAC
1086         *   pseudo_palette[X] is programmed to (X << red.offset) |
1087         *                                      (X << green.offset) |
1088         *                                      (X << blue.offset)
1089         *   RAMDAC[X] is programmed to (red, green, blue)
1090         *   color depth = SUM(var->{color}.length)
1091         *
1092         * Pseudocolor:
1093         *      var->{color}.offset is 0
1094         *      var->{color}.length contains width of DAC or the number
1095         *                      of unique colors available (color depth)
1096         *      pseudo_palette is not used
1097         *      RAMDAC[X] is programmed to (red, green, blue)
1098         *      color depth = var->{color}.length
1099         */
1100
1101        /*
1102         * This is the point where the color is converted to something that
1103         * is acceptable by the hardware.
1104         */
1105#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
1106        red = CNVT_TOHW(red, info->var.red.length);
1107        green = CNVT_TOHW(green, info->var.green.length);
1108        blue = CNVT_TOHW(blue, info->var.blue.length);
1109        transp = CNVT_TOHW(transp, info->var.transp.length);
1110#undef CNVT_TOHW
1111
1112        if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
1113        info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
1114                u32 v;
1115
1116                if (regno >= 16)
1117                        return -EINVAL;
1118
1119                v = (red << info->var.red.offset) |
1120                        (green << info->var.green.offset) |
1121                        (blue << info->var.blue.offset) |
1122                        (transp << info->var.transp.offset);
1123
1124                switch (info->var.bits_per_pixel) {
1125                case 8:
1126                        break;
1127                case 16:
1128                case 32:
1129                        ((u32 *)(info->pseudo_palette))[regno] = v;
1130                        break;
1131                }
1132                return 0;
1133        } else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR)
1134                pm3fb_set_color(par, regno, red, green, blue);
1135
1136        return 0;
1137}
1138
1139static int pm3fb_pan_display(struct fb_var_screeninfo *var,
1140                                 struct fb_info *info)
1141{
1142        struct pm3_par *par = info->par;
1143        const u32 xres = (info->var.xres + 31) & ~31;
1144
1145        par->base = pm3fb_shift_bpp(info->var.bits_per_pixel,
1146                                        (var->yoffset * xres)
1147                                        + var->xoffset);
1148        PM3_WAIT(par, 1);
1149        PM3_WRITE_REG(par, PM3ScreenBase, par->base);
1150        return 0;
1151}
1152
1153static int pm3fb_blank(int blank_mode, struct fb_info *info)
1154{
1155        struct pm3_par *par = info->par;
1156        u32 video = par->video;
1157
1158        /*
1159         * Oxygen VX1 - it appears that setting PM3VideoControl and
1160         * then PM3RD_SyncControl to the same SYNC settings undoes
1161         * any net change - they seem to xor together.  Only set the
1162         * sync options in PM3RD_SyncControl.  --rmk
1163         */
1164        video &= ~(PM3VideoControl_HSYNC_MASK |
1165                   PM3VideoControl_VSYNC_MASK);
1166        video |= PM3VideoControl_HSYNC_ACTIVE_HIGH |
1167                 PM3VideoControl_VSYNC_ACTIVE_HIGH;
1168
1169        switch (blank_mode) {
1170        case FB_BLANK_UNBLANK:
1171                video |= PM3VideoControl_ENABLE;
1172                break;
1173        case FB_BLANK_NORMAL:
1174                video &= ~PM3VideoControl_ENABLE;
1175                break;
1176        case FB_BLANK_HSYNC_SUSPEND:
1177                video &= ~(PM3VideoControl_HSYNC_MASK |
1178                          PM3VideoControl_BLANK_ACTIVE_LOW);
1179                break;
1180        case FB_BLANK_VSYNC_SUSPEND:
1181                video &= ~(PM3VideoControl_VSYNC_MASK |
1182                          PM3VideoControl_BLANK_ACTIVE_LOW);
1183                break;
1184        case FB_BLANK_POWERDOWN:
1185                video &= ~(PM3VideoControl_HSYNC_MASK |
1186                          PM3VideoControl_VSYNC_MASK |
1187                          PM3VideoControl_BLANK_ACTIVE_LOW);
1188                break;
1189        default:
1190                DPRINTK("Unsupported blanking %d\n", blank_mode);
1191                return 1;
1192        }
1193
1194        PM3_WAIT(par, 1);
1195        PM3_WRITE_REG(par, PM3VideoControl, video);
1196        return 0;
1197}
1198
1199        /*
1200         *  Frame buffer operations
1201         */
1202
1203static struct fb_ops pm3fb_ops = {
1204        .owner          = THIS_MODULE,
1205        .fb_check_var   = pm3fb_check_var,
1206        .fb_set_par     = pm3fb_set_par,
1207        .fb_setcolreg   = pm3fb_setcolreg,
1208        .fb_pan_display = pm3fb_pan_display,
1209        .fb_fillrect    = pm3fb_fillrect,
1210        .fb_copyarea    = pm3fb_copyarea,
1211        .fb_imageblit   = pm3fb_imageblit,
1212        .fb_blank       = pm3fb_blank,
1213        .fb_sync        = pm3fb_sync,
1214        .fb_cursor      = pm3fb_cursor,
1215};
1216
1217/* ------------------------------------------------------------------------- */
1218
1219        /*
1220         *  Initialization
1221         */
1222
1223/* mmio register are already mapped when this function is called */
1224/* the pm3fb_fix.smem_start is also set */
1225static unsigned long pm3fb_size_memory(struct pm3_par *par)
1226{
1227        unsigned long   memsize = 0;
1228        unsigned long   tempBypass, i, temp1, temp2;
1229        unsigned char   __iomem *screen_mem;
1230
1231        pm3fb_fix.smem_len = 64 * 1024l * 1024; /* request full aperture size */
1232        /* Linear frame buffer - request region and map it. */
1233        if (!request_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len,
1234                                 "pm3fb smem")) {
1235                printk(KERN_WARNING "pm3fb: Can't reserve smem.\n");
1236                return 0;
1237        }
1238        screen_mem =
1239                ioremap_nocache(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
1240        if (!screen_mem) {
1241                printk(KERN_WARNING "pm3fb: Can't ioremap smem area.\n");
1242                release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
1243                return 0;
1244        }
1245
1246        /* TODO: card-specific stuff, *before* accessing *any* FB memory */
1247        /* For Appian Jeronimo 2000 board second head */
1248
1249        tempBypass = PM3_READ_REG(par, PM3MemBypassWriteMask);
1250
1251        DPRINTK("PM3MemBypassWriteMask was: 0x%08lx\n", tempBypass);
1252
1253        PM3_WAIT(par, 1);
1254        PM3_WRITE_REG(par, PM3MemBypassWriteMask, 0xFFFFFFFF);
1255
1256        /* pm3 split up memory, replicates, and do a lot of
1257         * nasty stuff IMHO ;-)
1258         */
1259        for (i = 0; i < 32; i++) {
1260                fb_writel(i * 0x00345678,
1261                          (screen_mem + (i * 1048576)));
1262                mb();
1263                temp1 = fb_readl((screen_mem + (i * 1048576)));
1264
1265                /* Let's check for wrapover, write will fail at 16MB boundary */
1266                if (temp1 == (i * 0x00345678))
1267                        memsize = i;
1268                else
1269                        break;
1270        }
1271
1272        DPRINTK("First detect pass already got %ld MB\n", memsize + 1);
1273
1274        if (memsize + 1 == i) {
1275                for (i = 0; i < 32; i++) {
1276                        /* Clear first 32MB ; 0 is 0, no need to byteswap */
1277                        writel(0x0000000, (screen_mem + (i * 1048576)));
1278                }
1279                wmb();
1280
1281                for (i = 32; i < 64; i++) {
1282                        fb_writel(i * 0x00345678,
1283                                  (screen_mem + (i * 1048576)));
1284                        mb();
1285                        temp1 =
1286                            fb_readl((screen_mem + (i * 1048576)));
1287                        temp2 =
1288                            fb_readl((screen_mem + ((i - 32) * 1048576)));
1289                        /* different value, different RAM... */
1290                        if ((temp1 == (i * 0x00345678)) && (temp2 == 0))
1291                                memsize = i;
1292                        else
1293                                break;
1294                }
1295        }
1296        DPRINTK("Second detect pass got %ld MB\n", memsize + 1);
1297
1298        PM3_WAIT(par, 1);
1299        PM3_WRITE_REG(par, PM3MemBypassWriteMask, tempBypass);
1300
1301        iounmap(screen_mem);
1302        release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
1303        memsize = 1048576 * (memsize + 1);
1304
1305        DPRINTK("Returning 0x%08lx bytes\n", memsize);
1306
1307        return memsize;
1308}
1309
1310static int pm3fb_probe(struct pci_dev *dev, const struct pci_device_id *ent)
1311{
1312        struct fb_info *info;
1313        struct pm3_par *par;
1314        struct device *device = &dev->dev; /* for pci drivers */
1315        int err;
1316        int retval = -ENXIO;
1317
1318        err = pci_enable_device(dev);
1319        if (err) {
1320                printk(KERN_WARNING "pm3fb: Can't enable PCI dev: %d\n", err);
1321                return err;
1322        }
1323        /*
1324         * Dynamically allocate info and par
1325         */
1326        info = framebuffer_alloc(sizeof(struct pm3_par), device);
1327
1328        if (!info)
1329                return -ENOMEM;
1330        par = info->par;
1331
1332        /*
1333         * Here we set the screen_base to the virtual memory address
1334         * for the framebuffer.
1335         */
1336        pm3fb_fix.mmio_start = pci_resource_start(dev, 0);
1337        pm3fb_fix.mmio_len = PM3_REGS_SIZE;
1338#if defined(__BIG_ENDIAN)
1339        pm3fb_fix.mmio_start += PM3_REGS_SIZE;
1340        DPRINTK("Adjusting register base for big-endian.\n");
1341#endif
1342
1343        /* Registers - request region and map it. */
1344        if (!request_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len,
1345                                 "pm3fb regbase")) {
1346                printk(KERN_WARNING "pm3fb: Can't reserve regbase.\n");
1347                goto err_exit_neither;
1348        }
1349        par->v_regs =
1350                ioremap_nocache(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
1351        if (!par->v_regs) {
1352                printk(KERN_WARNING "pm3fb: Can't remap %s register area.\n",
1353                        pm3fb_fix.id);
1354                release_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
1355                goto err_exit_neither;
1356        }
1357
1358        /* Linear frame buffer - request region and map it. */
1359        pm3fb_fix.smem_start = pci_resource_start(dev, 1);
1360        pm3fb_fix.smem_len = pm3fb_size_memory(par);
1361        if (!pm3fb_fix.smem_len) {
1362                printk(KERN_WARNING "pm3fb: Can't find memory on board.\n");
1363                goto err_exit_mmio;
1364        }
1365        if (!request_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len,
1366                                 "pm3fb smem")) {
1367                printk(KERN_WARNING "pm3fb: Can't reserve smem.\n");
1368                goto err_exit_mmio;
1369        }
1370        info->screen_base = ioremap_wc(pm3fb_fix.smem_start,
1371                                       pm3fb_fix.smem_len);
1372        if (!info->screen_base) {
1373                printk(KERN_WARNING "pm3fb: Can't ioremap smem area.\n");
1374                release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
1375                goto err_exit_mmio;
1376        }
1377        info->screen_size = pm3fb_fix.smem_len;
1378
1379        if (!nomtrr)
1380                par->wc_cookie = arch_phys_wc_add(pm3fb_fix.smem_start,
1381                                                  pm3fb_fix.smem_len);
1382        info->fbops = &pm3fb_ops;
1383
1384        par->video = PM3_READ_REG(par, PM3VideoControl);
1385
1386        info->fix = pm3fb_fix;
1387        info->pseudo_palette = par->palette;
1388        info->flags = FBINFO_DEFAULT |
1389                        FBINFO_HWACCEL_XPAN |
1390                        FBINFO_HWACCEL_YPAN |
1391                        FBINFO_HWACCEL_COPYAREA |
1392                        FBINFO_HWACCEL_IMAGEBLIT |
1393                        FBINFO_HWACCEL_FILLRECT;
1394
1395        if (noaccel) {
1396                printk(KERN_DEBUG "disabling acceleration\n");
1397                info->flags |= FBINFO_HWACCEL_DISABLED;
1398        }
1399        info->pixmap.addr = kmalloc(PM3_PIXMAP_SIZE, GFP_KERNEL);
1400        if (!info->pixmap.addr) {
1401                retval = -ENOMEM;
1402                goto err_exit_pixmap;
1403        }
1404        info->pixmap.size = PM3_PIXMAP_SIZE;
1405        info->pixmap.buf_align = 4;
1406        info->pixmap.scan_align = 4;
1407        info->pixmap.access_align = 32;
1408        info->pixmap.flags = FB_PIXMAP_SYSTEM;
1409
1410        /*
1411         * This should give a reasonable default video mode. The following is
1412         * done when we can set a video mode.
1413         */
1414        if (!mode_option)
1415                mode_option = "640x480@60";
1416
1417        retval = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);
1418
1419        if (!retval || retval == 4) {
1420                retval = -EINVAL;
1421                goto err_exit_both;
1422        }
1423
1424        if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1425                retval = -ENOMEM;
1426                goto err_exit_both;
1427        }
1428
1429        /*
1430         * For drivers that can...
1431         */
1432        pm3fb_check_var(&info->var, info);
1433
1434        if (register_framebuffer(info) < 0) {
1435                retval = -EINVAL;
1436                goto err_exit_all;
1437        }
1438        fb_info(info, "%s frame buffer device\n", info->fix.id);
1439        pci_set_drvdata(dev, info);
1440        return 0;
1441
1442 err_exit_all:
1443        fb_dealloc_cmap(&info->cmap);
1444 err_exit_both:
1445        kfree(info->pixmap.addr);
1446 err_exit_pixmap:
1447        iounmap(info->screen_base);
1448        release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
1449 err_exit_mmio:
1450        iounmap(par->v_regs);
1451        release_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
1452 err_exit_neither:
1453        framebuffer_release(info);
1454        return retval;
1455}
1456
1457        /*
1458         *  Cleanup
1459         */
1460static void pm3fb_remove(struct pci_dev *dev)
1461{
1462        struct fb_info *info = pci_get_drvdata(dev);
1463
1464        if (info) {
1465                struct fb_fix_screeninfo *fix = &info->fix;
1466                struct pm3_par *par = info->par;
1467
1468                unregister_framebuffer(info);
1469                fb_dealloc_cmap(&info->cmap);
1470
1471                arch_phys_wc_del(par->wc_cookie);
1472                iounmap(info->screen_base);
1473                release_mem_region(fix->smem_start, fix->smem_len);
1474                iounmap(par->v_regs);
1475                release_mem_region(fix->mmio_start, fix->mmio_len);
1476
1477                kfree(info->pixmap.addr);
1478                framebuffer_release(info);
1479        }
1480}
1481
1482static struct pci_device_id pm3fb_id_table[] = {
1483        { PCI_VENDOR_ID_3DLABS, 0x0a,
1484          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1485        { 0, }
1486};
1487
1488/* For PCI drivers */
1489static struct pci_driver pm3fb_driver = {
1490        .name =         "pm3fb",
1491        .id_table =     pm3fb_id_table,
1492        .probe =        pm3fb_probe,
1493        .remove =       pm3fb_remove,
1494};
1495
1496MODULE_DEVICE_TABLE(pci, pm3fb_id_table);
1497
1498#ifndef MODULE
1499        /*
1500         *  Setup
1501         */
1502
1503/*
1504 * Only necessary if your driver takes special options,
1505 * otherwise we fall back on the generic fb_setup().
1506 */
1507static int __init pm3fb_setup(char *options)
1508{
1509        char *this_opt;
1510
1511        /* Parse user specified options (`video=pm3fb:') */
1512        if (!options || !*options)
1513                return 0;
1514
1515        while ((this_opt = strsep(&options, ",")) != NULL) {
1516                if (!*this_opt)
1517                        continue;
1518                else if (!strncmp(this_opt, "noaccel", 7))
1519                        noaccel = 1;
1520                else if (!strncmp(this_opt, "hwcursor=", 9))
1521                        hwcursor = simple_strtoul(this_opt + 9, NULL, 0);
1522                else if (!strncmp(this_opt, "nomtrr", 6))
1523                        nomtrr = 1;
1524                else
1525                        mode_option = this_opt;
1526        }
1527        return 0;
1528}
1529#endif /* MODULE */
1530
1531static int __init pm3fb_init(void)
1532{
1533        /*
1534         *  For kernel boot options (in 'video=pm3fb:<options>' format)
1535         */
1536#ifndef MODULE
1537        char *option = NULL;
1538
1539        if (fb_get_options("pm3fb", &option))
1540                return -ENODEV;
1541        pm3fb_setup(option);
1542#endif
1543
1544        return pci_register_driver(&pm3fb_driver);
1545}
1546
1547#ifdef MODULE
1548static void __exit pm3fb_exit(void)
1549{
1550        pci_unregister_driver(&pm3fb_driver);
1551}
1552
1553module_exit(pm3fb_exit);
1554#endif
1555module_init(pm3fb_init);
1556
1557module_param(mode_option, charp, 0);
1558MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
1559module_param(noaccel, bool, 0);
1560MODULE_PARM_DESC(noaccel, "Disable acceleration");
1561module_param(hwcursor, int, 0644);
1562MODULE_PARM_DESC(hwcursor, "Enable hardware cursor "
1563                        "(1=enable, 0=disable, default=1)");
1564module_param(nomtrr, bool, 0);
1565MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
1566
1567MODULE_DESCRIPTION("Permedia3 framebuffer device driver");
1568MODULE_LICENSE("GPL");
1569