linux/drivers/video/riva/fbdev.c
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   1/*
   2 * linux/drivers/video/riva/fbdev.c - nVidia RIVA 128/TNT/TNT2 fb driver
   3 *
   4 * Maintained by Ani Joshi <ajoshi@shell.unixbox.com>
   5 *
   6 * Copyright 1999-2000 Jeff Garzik
   7 *
   8 * Contributors:
   9 *
  10 *      Ani Joshi:  Lots of debugging and cleanup work, really helped
  11 *      get the driver going
  12 *
  13 *      Ferenc Bakonyi:  Bug fixes, cleanup, modularization
  14 *
  15 *      Jindrich Makovicka:  Accel code help, hw cursor, mtrr
  16 *
  17 *      Paul Richards:  Bug fixes, updates
  18 *
  19 * Initial template from skeletonfb.c, created 28 Dec 1997 by Geert Uytterhoeven
  20 * Includes riva_hw.c from nVidia, see copyright below.
  21 * KGI code provided the basis for state storage, init, and mode switching.
  22 *
  23 * This file is subject to the terms and conditions of the GNU General Public
  24 * License.  See the file COPYING in the main directory of this archive
  25 * for more details.
  26 *
  27 * Known bugs and issues:
  28 *      restoring text mode fails
  29 *      doublescan modes are broken
  30 */
  31
  32#include <linux/module.h>
  33#include <linux/kernel.h>
  34#include <linux/errno.h>
  35#include <linux/string.h>
  36#include <linux/mm.h>
  37#include <linux/slab.h>
  38#include <linux/delay.h>
  39#include <linux/fb.h>
  40#include <linux/init.h>
  41#include <linux/pci.h>
  42#include <linux/backlight.h>
  43#include <linux/bitrev.h>
  44#ifdef CONFIG_MTRR
  45#include <asm/mtrr.h>
  46#endif
  47#ifdef CONFIG_PPC_OF
  48#include <asm/prom.h>
  49#include <asm/pci-bridge.h>
  50#endif
  51#ifdef CONFIG_PMAC_BACKLIGHT
  52#include <asm/machdep.h>
  53#include <asm/backlight.h>
  54#endif
  55
  56#include "rivafb.h"
  57#include "nvreg.h"
  58
  59/* version number of this driver */
  60#define RIVAFB_VERSION "0.9.5b"
  61
  62/* ------------------------------------------------------------------------- *
  63 *
  64 * various helpful macros and constants
  65 *
  66 * ------------------------------------------------------------------------- */
  67#ifdef CONFIG_FB_RIVA_DEBUG
  68#define NVTRACE          printk
  69#else
  70#define NVTRACE          if(0) printk
  71#endif
  72
  73#define NVTRACE_ENTER(...)  NVTRACE("%s START\n", __func__)
  74#define NVTRACE_LEAVE(...)  NVTRACE("%s END\n", __func__)
  75
  76#ifdef CONFIG_FB_RIVA_DEBUG
  77#define assert(expr) \
  78        if(!(expr)) { \
  79        printk( "Assertion failed! %s,%s,%s,line=%d\n",\
  80        #expr,__FILE__,__func__,__LINE__); \
  81        BUG(); \
  82        }
  83#else
  84#define assert(expr)
  85#endif
  86
  87#define PFX "rivafb: "
  88
  89/* macro that allows you to set overflow bits */
  90#define SetBitField(value,from,to) SetBF(to,GetBF(value,from))
  91#define SetBit(n)               (1<<(n))
  92#define Set8Bits(value)         ((value)&0xff)
  93
  94/* HW cursor parameters */
  95#define MAX_CURS                32
  96
  97/* ------------------------------------------------------------------------- *
  98 *
  99 * prototypes
 100 *
 101 * ------------------------------------------------------------------------- */
 102
 103static int rivafb_blank(int blank, struct fb_info *info);
 104
 105/* ------------------------------------------------------------------------- *
 106 *
 107 * card identification
 108 *
 109 * ------------------------------------------------------------------------- */
 110
 111static struct pci_device_id rivafb_pci_tbl[] = {
 112        { PCI_VENDOR_ID_NVIDIA_SGS, PCI_DEVICE_ID_NVIDIA_SGS_RIVA128,
 113          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 114        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_TNT,
 115          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 116        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_TNT2,
 117          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 118        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_UTNT2,
 119          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 120        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_VTNT2,
 121          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 122        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_UVTNT2,
 123          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 124        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_ITNT2,
 125          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 126        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE_SDR,
 127          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 128        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE_DDR,
 129          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 130        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO,
 131          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 132        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_MX,
 133          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 134        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_MX2,
 135          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 136        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_GO,
 137          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 138        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO2_MXR,
 139          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 140        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_GTS,
 141          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 142        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_GTS2,
 143          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 144        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE2_ULTRA,
 145          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 146        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO2_PRO,
 147          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 148        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_MX_460,
 149          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 150        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_MX_440,
 151          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 152        // NF2/IGP version, GeForce 4 MX, NV18
 153        { PCI_VENDOR_ID_NVIDIA, 0x01f0,
 154          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 155        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_MX_420,
 156          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 157        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_440_GO,
 158          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 159        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_420_GO,
 160          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 161        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_420_GO_M32,
 162          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 163        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_500XGL,
 164          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 165        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_440_GO_M64,
 166          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 167        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_200,
 168          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 169        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_550XGL,
 170          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 171        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_500_GOGL,
 172          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 173        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_IGEFORCE2,
 174          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 175        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE3,
 176          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 177        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE3_1,
 178          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 179        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE3_2,
 180          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 181        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO_DDC,
 182          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 183        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_TI_4600,
 184          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 185        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_TI_4400,
 186          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 187        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE4_TI_4200,
 188          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 189        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_900XGL,
 190          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 191        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_750XGL,
 192          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 193        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_QUADRO4_700XGL,
 194          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 195        { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_GEFORCE_FX_GO_5200,
 196          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 197        { 0, } /* terminate list */
 198};
 199MODULE_DEVICE_TABLE(pci, rivafb_pci_tbl);
 200
 201/* ------------------------------------------------------------------------- *
 202 *
 203 * global variables
 204 *
 205 * ------------------------------------------------------------------------- */
 206
 207/* command line data, set in rivafb_setup() */
 208static int flatpanel __devinitdata = -1; /* Autodetect later */
 209static int forceCRTC __devinitdata = -1;
 210static bool noaccel  __devinitdata = 0;
 211#ifdef CONFIG_MTRR
 212static bool nomtrr __devinitdata = 0;
 213#endif
 214#ifdef CONFIG_PMAC_BACKLIGHT
 215static int backlight __devinitdata = 1;
 216#else
 217static int backlight __devinitdata = 0;
 218#endif
 219
 220static char *mode_option __devinitdata = NULL;
 221static bool strictmode       = 0;
 222
 223static struct fb_fix_screeninfo __devinitdata rivafb_fix = {
 224        .type           = FB_TYPE_PACKED_PIXELS,
 225        .xpanstep       = 1,
 226        .ypanstep       = 1,
 227};
 228
 229static struct fb_var_screeninfo __devinitdata rivafb_default_var = {
 230        .xres           = 640,
 231        .yres           = 480,
 232        .xres_virtual   = 640,
 233        .yres_virtual   = 480,
 234        .bits_per_pixel = 8,
 235        .red            = {0, 8, 0},
 236        .green          = {0, 8, 0},
 237        .blue           = {0, 8, 0},
 238        .transp         = {0, 0, 0},
 239        .activate       = FB_ACTIVATE_NOW,
 240        .height         = -1,
 241        .width          = -1,
 242        .pixclock       = 39721,
 243        .left_margin    = 40,
 244        .right_margin   = 24,
 245        .upper_margin   = 32,
 246        .lower_margin   = 11,
 247        .hsync_len      = 96,
 248        .vsync_len      = 2,
 249        .vmode          = FB_VMODE_NONINTERLACED
 250};
 251
 252/* from GGI */
 253static const struct riva_regs reg_template = {
 254        {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,        /* ATTR */
 255         0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
 256         0x41, 0x01, 0x0F, 0x00, 0x00},
 257        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,        /* CRT  */
 258         0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00,
 259         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE3,        /* 0x10 */
 260         0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 261         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,        /* 0x20 */
 262         0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 263         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,        /* 0x30 */
 264         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 265         0x00,                                                  /* 0x40 */
 266         },
 267        {0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x05, 0x0F,        /* GRA  */
 268         0xFF},
 269        {0x03, 0x01, 0x0F, 0x00, 0x0E},                         /* SEQ  */
 270        0xEB                                                    /* MISC */
 271};
 272
 273/*
 274 * Backlight control
 275 */
 276#ifdef CONFIG_FB_RIVA_BACKLIGHT
 277/* We do not have any information about which values are allowed, thus
 278 * we used safe values.
 279 */
 280#define MIN_LEVEL 0x158
 281#define MAX_LEVEL 0x534
 282#define LEVEL_STEP ((MAX_LEVEL - MIN_LEVEL) / FB_BACKLIGHT_MAX)
 283
 284static int riva_bl_get_level_brightness(struct riva_par *par,
 285                int level)
 286{
 287        struct fb_info *info = pci_get_drvdata(par->pdev);
 288        int nlevel;
 289
 290        /* Get and convert the value */
 291        /* No locking on bl_curve since accessing a single value */
 292        nlevel = MIN_LEVEL + info->bl_curve[level] * LEVEL_STEP;
 293
 294        if (nlevel < 0)
 295                nlevel = 0;
 296        else if (nlevel < MIN_LEVEL)
 297                nlevel = MIN_LEVEL;
 298        else if (nlevel > MAX_LEVEL)
 299                nlevel = MAX_LEVEL;
 300
 301        return nlevel;
 302}
 303
 304static int riva_bl_update_status(struct backlight_device *bd)
 305{
 306        struct riva_par *par = bl_get_data(bd);
 307        U032 tmp_pcrt, tmp_pmc;
 308        int level;
 309
 310        if (bd->props.power != FB_BLANK_UNBLANK ||
 311            bd->props.fb_blank != FB_BLANK_UNBLANK)
 312                level = 0;
 313        else
 314                level = bd->props.brightness;
 315
 316        tmp_pmc = NV_RD32(par->riva.PMC, 0x10F0) & 0x0000FFFF;
 317        tmp_pcrt = NV_RD32(par->riva.PCRTC0, 0x081C) & 0xFFFFFFFC;
 318        if(level > 0) {
 319                tmp_pcrt |= 0x1;
 320                tmp_pmc |= (1 << 31); /* backlight bit */
 321                tmp_pmc |= riva_bl_get_level_brightness(par, level) << 16; /* level */
 322        }
 323        NV_WR32(par->riva.PCRTC0, 0x081C, tmp_pcrt);
 324        NV_WR32(par->riva.PMC, 0x10F0, tmp_pmc);
 325
 326        return 0;
 327}
 328
 329static int riva_bl_get_brightness(struct backlight_device *bd)
 330{
 331        return bd->props.brightness;
 332}
 333
 334static const struct backlight_ops riva_bl_ops = {
 335        .get_brightness = riva_bl_get_brightness,
 336        .update_status  = riva_bl_update_status,
 337};
 338
 339static void riva_bl_init(struct riva_par *par)
 340{
 341        struct backlight_properties props;
 342        struct fb_info *info = pci_get_drvdata(par->pdev);
 343        struct backlight_device *bd;
 344        char name[12];
 345
 346        if (!par->FlatPanel)
 347                return;
 348
 349#ifdef CONFIG_PMAC_BACKLIGHT
 350        if (!machine_is(powermac) ||
 351            !pmac_has_backlight_type("mnca"))
 352                return;
 353#endif
 354
 355        snprintf(name, sizeof(name), "rivabl%d", info->node);
 356
 357        memset(&props, 0, sizeof(struct backlight_properties));
 358        props.type = BACKLIGHT_RAW;
 359        props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
 360        bd = backlight_device_register(name, info->dev, par, &riva_bl_ops,
 361                                       &props);
 362        if (IS_ERR(bd)) {
 363                info->bl_dev = NULL;
 364                printk(KERN_WARNING "riva: Backlight registration failed\n");
 365                goto error;
 366        }
 367
 368        info->bl_dev = bd;
 369        fb_bl_default_curve(info, 0,
 370                MIN_LEVEL * FB_BACKLIGHT_MAX / MAX_LEVEL,
 371                FB_BACKLIGHT_MAX);
 372
 373        bd->props.brightness = bd->props.max_brightness;
 374        bd->props.power = FB_BLANK_UNBLANK;
 375        backlight_update_status(bd);
 376
 377        printk("riva: Backlight initialized (%s)\n", name);
 378
 379        return;
 380
 381error:
 382        return;
 383}
 384
 385static void riva_bl_exit(struct fb_info *info)
 386{
 387        struct backlight_device *bd = info->bl_dev;
 388
 389        backlight_device_unregister(bd);
 390        printk("riva: Backlight unloaded\n");
 391}
 392#else
 393static inline void riva_bl_init(struct riva_par *par) {}
 394static inline void riva_bl_exit(struct fb_info *info) {}
 395#endif /* CONFIG_FB_RIVA_BACKLIGHT */
 396
 397/* ------------------------------------------------------------------------- *
 398 *
 399 * MMIO access macros
 400 *
 401 * ------------------------------------------------------------------------- */
 402
 403static inline void CRTCout(struct riva_par *par, unsigned char index,
 404                           unsigned char val)
 405{
 406        VGA_WR08(par->riva.PCIO, 0x3d4, index);
 407        VGA_WR08(par->riva.PCIO, 0x3d5, val);
 408}
 409
 410static inline unsigned char CRTCin(struct riva_par *par,
 411                                   unsigned char index)
 412{
 413        VGA_WR08(par->riva.PCIO, 0x3d4, index);
 414        return (VGA_RD08(par->riva.PCIO, 0x3d5));
 415}
 416
 417static inline void GRAout(struct riva_par *par, unsigned char index,
 418                          unsigned char val)
 419{
 420        VGA_WR08(par->riva.PVIO, 0x3ce, index);
 421        VGA_WR08(par->riva.PVIO, 0x3cf, val);
 422}
 423
 424static inline unsigned char GRAin(struct riva_par *par,
 425                                  unsigned char index)
 426{
 427        VGA_WR08(par->riva.PVIO, 0x3ce, index);
 428        return (VGA_RD08(par->riva.PVIO, 0x3cf));
 429}
 430
 431static inline void SEQout(struct riva_par *par, unsigned char index,
 432                          unsigned char val)
 433{
 434        VGA_WR08(par->riva.PVIO, 0x3c4, index);
 435        VGA_WR08(par->riva.PVIO, 0x3c5, val);
 436}
 437
 438static inline unsigned char SEQin(struct riva_par *par,
 439                                  unsigned char index)
 440{
 441        VGA_WR08(par->riva.PVIO, 0x3c4, index);
 442        return (VGA_RD08(par->riva.PVIO, 0x3c5));
 443}
 444
 445static inline void ATTRout(struct riva_par *par, unsigned char index,
 446                           unsigned char val)
 447{
 448        VGA_WR08(par->riva.PCIO, 0x3c0, index);
 449        VGA_WR08(par->riva.PCIO, 0x3c0, val);
 450}
 451
 452static inline unsigned char ATTRin(struct riva_par *par,
 453                                   unsigned char index)
 454{
 455        VGA_WR08(par->riva.PCIO, 0x3c0, index);
 456        return (VGA_RD08(par->riva.PCIO, 0x3c1));
 457}
 458
 459static inline void MISCout(struct riva_par *par, unsigned char val)
 460{
 461        VGA_WR08(par->riva.PVIO, 0x3c2, val);
 462}
 463
 464static inline unsigned char MISCin(struct riva_par *par)
 465{
 466        return (VGA_RD08(par->riva.PVIO, 0x3cc));
 467}
 468
 469static inline void reverse_order(u32 *l)
 470{
 471        u8 *a = (u8 *)l;
 472        a[0] = bitrev8(a[0]);
 473        a[1] = bitrev8(a[1]);
 474        a[2] = bitrev8(a[2]);
 475        a[3] = bitrev8(a[3]);
 476}
 477
 478/* ------------------------------------------------------------------------- *
 479 *
 480 * cursor stuff
 481 *
 482 * ------------------------------------------------------------------------- */
 483
 484/**
 485 * rivafb_load_cursor_image - load cursor image to hardware
 486 * @data: address to monochrome bitmap (1 = foreground color, 0 = background)
 487 * @par:  pointer to private data
 488 * @w:    width of cursor image in pixels
 489 * @h:    height of cursor image in scanlines
 490 * @bg:   background color (ARGB1555) - alpha bit determines opacity
 491 * @fg:   foreground color (ARGB1555)
 492 *
 493 * DESCRIPTiON:
 494 * Loads cursor image based on a monochrome source and mask bitmap.  The
 495 * image bits determines the color of the pixel, 0 for background, 1 for
 496 * foreground.  Only the affected region (as determined by @w and @h 
 497 * parameters) will be updated.
 498 *
 499 * CALLED FROM:
 500 * rivafb_cursor()
 501 */
 502static void rivafb_load_cursor_image(struct riva_par *par, u8 *data8,
 503                                     u16 bg, u16 fg, u32 w, u32 h)
 504{
 505        int i, j, k = 0;
 506        u32 b, tmp;
 507        u32 *data = (u32 *)data8;
 508        bg = le16_to_cpu(bg);
 509        fg = le16_to_cpu(fg);
 510
 511        w = (w + 1) & ~1;
 512
 513        for (i = 0; i < h; i++) {
 514                b = *data++;
 515                reverse_order(&b);
 516                
 517                for (j = 0; j < w/2; j++) {
 518                        tmp = 0;
 519#if defined (__BIG_ENDIAN)
 520                        tmp = (b & (1 << 31)) ? fg << 16 : bg << 16;
 521                        b <<= 1;
 522                        tmp |= (b & (1 << 31)) ? fg : bg;
 523                        b <<= 1;
 524#else
 525                        tmp = (b & 1) ? fg : bg;
 526                        b >>= 1;
 527                        tmp |= (b & 1) ? fg << 16 : bg << 16;
 528                        b >>= 1;
 529#endif
 530                        writel(tmp, &par->riva.CURSOR[k++]);
 531                }
 532                k += (MAX_CURS - w)/2;
 533        }
 534}
 535
 536/* ------------------------------------------------------------------------- *
 537 *
 538 * general utility functions
 539 *
 540 * ------------------------------------------------------------------------- */
 541
 542/**
 543 * riva_wclut - set CLUT entry
 544 * @chip: pointer to RIVA_HW_INST object
 545 * @regnum: register number
 546 * @red: red component
 547 * @green: green component
 548 * @blue: blue component
 549 *
 550 * DESCRIPTION:
 551 * Sets color register @regnum.
 552 *
 553 * CALLED FROM:
 554 * rivafb_setcolreg()
 555 */
 556static void riva_wclut(RIVA_HW_INST *chip,
 557                       unsigned char regnum, unsigned char red,
 558                       unsigned char green, unsigned char blue)
 559{
 560        VGA_WR08(chip->PDIO, 0x3c8, regnum);
 561        VGA_WR08(chip->PDIO, 0x3c9, red);
 562        VGA_WR08(chip->PDIO, 0x3c9, green);
 563        VGA_WR08(chip->PDIO, 0x3c9, blue);
 564}
 565
 566/**
 567 * riva_rclut - read fromCLUT register
 568 * @chip: pointer to RIVA_HW_INST object
 569 * @regnum: register number
 570 * @red: red component
 571 * @green: green component
 572 * @blue: blue component
 573 *
 574 * DESCRIPTION:
 575 * Reads red, green, and blue from color register @regnum.
 576 *
 577 * CALLED FROM:
 578 * rivafb_setcolreg()
 579 */
 580static void riva_rclut(RIVA_HW_INST *chip,
 581                       unsigned char regnum, unsigned char *red,
 582                       unsigned char *green, unsigned char *blue)
 583{
 584        
 585        VGA_WR08(chip->PDIO, 0x3c7, regnum);
 586        *red = VGA_RD08(chip->PDIO, 0x3c9);
 587        *green = VGA_RD08(chip->PDIO, 0x3c9);
 588        *blue = VGA_RD08(chip->PDIO, 0x3c9);
 589}
 590
 591/**
 592 * riva_save_state - saves current chip state
 593 * @par: pointer to riva_par object containing info for current riva board
 594 * @regs: pointer to riva_regs object
 595 *
 596 * DESCRIPTION:
 597 * Saves current chip state to @regs.
 598 *
 599 * CALLED FROM:
 600 * rivafb_probe()
 601 */
 602/* from GGI */
 603static void riva_save_state(struct riva_par *par, struct riva_regs *regs)
 604{
 605        int i;
 606
 607        NVTRACE_ENTER();
 608        par->riva.LockUnlock(&par->riva, 0);
 609
 610        par->riva.UnloadStateExt(&par->riva, &regs->ext);
 611
 612        regs->misc_output = MISCin(par);
 613
 614        for (i = 0; i < NUM_CRT_REGS; i++)
 615                regs->crtc[i] = CRTCin(par, i);
 616
 617        for (i = 0; i < NUM_ATC_REGS; i++)
 618                regs->attr[i] = ATTRin(par, i);
 619
 620        for (i = 0; i < NUM_GRC_REGS; i++)
 621                regs->gra[i] = GRAin(par, i);
 622
 623        for (i = 0; i < NUM_SEQ_REGS; i++)
 624                regs->seq[i] = SEQin(par, i);
 625        NVTRACE_LEAVE();
 626}
 627
 628/**
 629 * riva_load_state - loads current chip state
 630 * @par: pointer to riva_par object containing info for current riva board
 631 * @regs: pointer to riva_regs object
 632 *
 633 * DESCRIPTION:
 634 * Loads chip state from @regs.
 635 *
 636 * CALLED FROM:
 637 * riva_load_video_mode()
 638 * rivafb_probe()
 639 * rivafb_remove()
 640 */
 641/* from GGI */
 642static void riva_load_state(struct riva_par *par, struct riva_regs *regs)
 643{
 644        RIVA_HW_STATE *state = &regs->ext;
 645        int i;
 646
 647        NVTRACE_ENTER();
 648        CRTCout(par, 0x11, 0x00);
 649
 650        par->riva.LockUnlock(&par->riva, 0);
 651
 652        par->riva.LoadStateExt(&par->riva, state);
 653
 654        MISCout(par, regs->misc_output);
 655
 656        for (i = 0; i < NUM_CRT_REGS; i++) {
 657                switch (i) {
 658                case 0x19:
 659                case 0x20 ... 0x40:
 660                        break;
 661                default:
 662                        CRTCout(par, i, regs->crtc[i]);
 663                }
 664        }
 665
 666        for (i = 0; i < NUM_ATC_REGS; i++)
 667                ATTRout(par, i, regs->attr[i]);
 668
 669        for (i = 0; i < NUM_GRC_REGS; i++)
 670                GRAout(par, i, regs->gra[i]);
 671
 672        for (i = 0; i < NUM_SEQ_REGS; i++)
 673                SEQout(par, i, regs->seq[i]);
 674        NVTRACE_LEAVE();
 675}
 676
 677/**
 678 * riva_load_video_mode - calculate timings
 679 * @info: pointer to fb_info object containing info for current riva board
 680 *
 681 * DESCRIPTION:
 682 * Calculate some timings and then send em off to riva_load_state().
 683 *
 684 * CALLED FROM:
 685 * rivafb_set_par()
 686 */
 687static int riva_load_video_mode(struct fb_info *info)
 688{
 689        int bpp, width, hDisplaySize, hDisplay, hStart,
 690            hEnd, hTotal, height, vDisplay, vStart, vEnd, vTotal, dotClock;
 691        int hBlankStart, hBlankEnd, vBlankStart, vBlankEnd;
 692        int rc;
 693        struct riva_par *par = info->par;
 694        struct riva_regs newmode;
 695        
 696        NVTRACE_ENTER();
 697        /* time to calculate */
 698        rivafb_blank(FB_BLANK_NORMAL, info);
 699
 700        bpp = info->var.bits_per_pixel;
 701        if (bpp == 16 && info->var.green.length == 5)
 702                bpp = 15;
 703        width = info->var.xres_virtual;
 704        hDisplaySize = info->var.xres;
 705        hDisplay = (hDisplaySize / 8) - 1;
 706        hStart = (hDisplaySize + info->var.right_margin) / 8 - 1;
 707        hEnd = (hDisplaySize + info->var.right_margin +
 708                info->var.hsync_len) / 8 - 1;
 709        hTotal = (hDisplaySize + info->var.right_margin +
 710                  info->var.hsync_len + info->var.left_margin) / 8 - 5;
 711        hBlankStart = hDisplay;
 712        hBlankEnd = hTotal + 4;
 713
 714        height = info->var.yres_virtual;
 715        vDisplay = info->var.yres - 1;
 716        vStart = info->var.yres + info->var.lower_margin - 1;
 717        vEnd = info->var.yres + info->var.lower_margin +
 718               info->var.vsync_len - 1;
 719        vTotal = info->var.yres + info->var.lower_margin +
 720                 info->var.vsync_len + info->var.upper_margin + 2;
 721        vBlankStart = vDisplay;
 722        vBlankEnd = vTotal + 1;
 723        dotClock = 1000000000 / info->var.pixclock;
 724
 725        memcpy(&newmode, &reg_template, sizeof(struct riva_regs));
 726
 727        if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED)
 728                vTotal |= 1;
 729
 730        if (par->FlatPanel) {
 731                vStart = vTotal - 3;
 732                vEnd = vTotal - 2;
 733                vBlankStart = vStart;
 734                hStart = hTotal - 3;
 735                hEnd = hTotal - 2;
 736                hBlankEnd = hTotal + 4;
 737        }
 738
 739        newmode.crtc[0x0] = Set8Bits (hTotal); 
 740        newmode.crtc[0x1] = Set8Bits (hDisplay);
 741        newmode.crtc[0x2] = Set8Bits (hBlankStart);
 742        newmode.crtc[0x3] = SetBitField (hBlankEnd, 4: 0, 4:0) | SetBit (7);
 743        newmode.crtc[0x4] = Set8Bits (hStart);
 744        newmode.crtc[0x5] = SetBitField (hBlankEnd, 5: 5, 7:7)
 745                | SetBitField (hEnd, 4: 0, 4:0);
 746        newmode.crtc[0x6] = SetBitField (vTotal, 7: 0, 7:0);
 747        newmode.crtc[0x7] = SetBitField (vTotal, 8: 8, 0:0)
 748                | SetBitField (vDisplay, 8: 8, 1:1)
 749                | SetBitField (vStart, 8: 8, 2:2)
 750                | SetBitField (vBlankStart, 8: 8, 3:3)
 751                | SetBit (4)
 752                | SetBitField (vTotal, 9: 9, 5:5)
 753                | SetBitField (vDisplay, 9: 9, 6:6)
 754                | SetBitField (vStart, 9: 9, 7:7);
 755        newmode.crtc[0x9] = SetBitField (vBlankStart, 9: 9, 5:5)
 756                | SetBit (6);
 757        newmode.crtc[0x10] = Set8Bits (vStart);
 758        newmode.crtc[0x11] = SetBitField (vEnd, 3: 0, 3:0)
 759                | SetBit (5);
 760        newmode.crtc[0x12] = Set8Bits (vDisplay);
 761        newmode.crtc[0x13] = (width / 8) * ((bpp + 1) / 8);
 762        newmode.crtc[0x15] = Set8Bits (vBlankStart);
 763        newmode.crtc[0x16] = Set8Bits (vBlankEnd);
 764
 765        newmode.ext.screen = SetBitField(hBlankEnd,6:6,4:4)
 766                | SetBitField(vBlankStart,10:10,3:3)
 767                | SetBitField(vStart,10:10,2:2)
 768                | SetBitField(vDisplay,10:10,1:1)
 769                | SetBitField(vTotal,10:10,0:0);
 770        newmode.ext.horiz  = SetBitField(hTotal,8:8,0:0) 
 771                | SetBitField(hDisplay,8:8,1:1)
 772                | SetBitField(hBlankStart,8:8,2:2)
 773                | SetBitField(hStart,8:8,3:3);
 774        newmode.ext.extra  = SetBitField(vTotal,11:11,0:0)
 775                | SetBitField(vDisplay,11:11,2:2)
 776                | SetBitField(vStart,11:11,4:4)
 777                | SetBitField(vBlankStart,11:11,6:6); 
 778
 779        if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
 780                int tmp = (hTotal >> 1) & ~1;
 781                newmode.ext.interlace = Set8Bits(tmp);
 782                newmode.ext.horiz |= SetBitField(tmp, 8:8,4:4);
 783        } else 
 784                newmode.ext.interlace = 0xff; /* interlace off */
 785
 786        if (par->riva.Architecture >= NV_ARCH_10)
 787                par->riva.CURSOR = (U032 __iomem *)(info->screen_base + par->riva.CursorStart);
 788
 789        if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
 790                newmode.misc_output &= ~0x40;
 791        else
 792                newmode.misc_output |= 0x40;
 793        if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
 794                newmode.misc_output &= ~0x80;
 795        else
 796                newmode.misc_output |= 0x80;    
 797
 798        rc = CalcStateExt(&par->riva, &newmode.ext, bpp, width,
 799                          hDisplaySize, height, dotClock);
 800        if (rc)
 801                goto out;
 802
 803        newmode.ext.scale = NV_RD32(par->riva.PRAMDAC, 0x00000848) &
 804                0xfff000ff;
 805        if (par->FlatPanel == 1) {
 806                newmode.ext.pixel |= (1 << 7);
 807                newmode.ext.scale |= (1 << 8);
 808        }
 809        if (par->SecondCRTC) {
 810                newmode.ext.head  = NV_RD32(par->riva.PCRTC0, 0x00000860) &
 811                        ~0x00001000;
 812                newmode.ext.head2 = NV_RD32(par->riva.PCRTC0, 0x00002860) |
 813                        0x00001000;
 814                newmode.ext.crtcOwner = 3;
 815                newmode.ext.pllsel |= 0x20000800;
 816                newmode.ext.vpll2 = newmode.ext.vpll;
 817        } else if (par->riva.twoHeads) {
 818                newmode.ext.head  =  NV_RD32(par->riva.PCRTC0, 0x00000860) |
 819                        0x00001000;
 820                newmode.ext.head2 =  NV_RD32(par->riva.PCRTC0, 0x00002860) &
 821                        ~0x00001000;
 822                newmode.ext.crtcOwner = 0;
 823                newmode.ext.vpll2 = NV_RD32(par->riva.PRAMDAC0, 0x00000520);
 824        }
 825        if (par->FlatPanel == 1) {
 826                newmode.ext.pixel |= (1 << 7);
 827                newmode.ext.scale |= (1 << 8);
 828        }
 829        newmode.ext.cursorConfig = 0x02000100;
 830        par->current_state = newmode;
 831        riva_load_state(par, &par->current_state);
 832        par->riva.LockUnlock(&par->riva, 0); /* important for HW cursor */
 833
 834out:
 835        rivafb_blank(FB_BLANK_UNBLANK, info);
 836        NVTRACE_LEAVE();
 837
 838        return rc;
 839}
 840
 841static void riva_update_var(struct fb_var_screeninfo *var,
 842                            const struct fb_videomode *modedb)
 843{
 844        NVTRACE_ENTER();
 845        var->xres = var->xres_virtual = modedb->xres;
 846        var->yres = modedb->yres;
 847        if (var->yres_virtual < var->yres)
 848            var->yres_virtual = var->yres;
 849        var->xoffset = var->yoffset = 0;
 850        var->pixclock = modedb->pixclock;
 851        var->left_margin = modedb->left_margin;
 852        var->right_margin = modedb->right_margin;
 853        var->upper_margin = modedb->upper_margin;
 854        var->lower_margin = modedb->lower_margin;
 855        var->hsync_len = modedb->hsync_len;
 856        var->vsync_len = modedb->vsync_len;
 857        var->sync = modedb->sync;
 858        var->vmode = modedb->vmode;
 859        NVTRACE_LEAVE();
 860}
 861
 862/**
 863 * rivafb_do_maximize - 
 864 * @info: pointer to fb_info object containing info for current riva board
 865 * @var:
 866 * @nom:
 867 * @den:
 868 *
 869 * DESCRIPTION:
 870 * .
 871 *
 872 * RETURNS:
 873 * -EINVAL on failure, 0 on success
 874 * 
 875 *
 876 * CALLED FROM:
 877 * rivafb_check_var()
 878 */
 879static int rivafb_do_maximize(struct fb_info *info,
 880                              struct fb_var_screeninfo *var,
 881                              int nom, int den)
 882{
 883        static struct {
 884                int xres, yres;
 885        } modes[] = {
 886                {1600, 1280},
 887                {1280, 1024},
 888                {1024, 768},
 889                {800, 600},
 890                {640, 480},
 891                {-1, -1}
 892        };
 893        int i;
 894
 895        NVTRACE_ENTER();
 896        /* use highest possible virtual resolution */
 897        if (var->xres_virtual == -1 && var->yres_virtual == -1) {
 898                printk(KERN_WARNING PFX
 899                       "using maximum available virtual resolution\n");
 900                for (i = 0; modes[i].xres != -1; i++) {
 901                        if (modes[i].xres * nom / den * modes[i].yres <
 902                            info->fix.smem_len)
 903                                break;
 904                }
 905                if (modes[i].xres == -1) {
 906                        printk(KERN_ERR PFX
 907                               "could not find a virtual resolution that fits into video memory!!\n");
 908                        NVTRACE("EXIT - EINVAL error\n");
 909                        return -EINVAL;
 910                }
 911                var->xres_virtual = modes[i].xres;
 912                var->yres_virtual = modes[i].yres;
 913
 914                printk(KERN_INFO PFX
 915                       "virtual resolution set to maximum of %dx%d\n",
 916                       var->xres_virtual, var->yres_virtual);
 917        } else if (var->xres_virtual == -1) {
 918                var->xres_virtual = (info->fix.smem_len * den /
 919                        (nom * var->yres_virtual)) & ~15;
 920                printk(KERN_WARNING PFX
 921                       "setting virtual X resolution to %d\n", var->xres_virtual);
 922        } else if (var->yres_virtual == -1) {
 923                var->xres_virtual = (var->xres_virtual + 15) & ~15;
 924                var->yres_virtual = info->fix.smem_len * den /
 925                        (nom * var->xres_virtual);
 926                printk(KERN_WARNING PFX
 927                       "setting virtual Y resolution to %d\n", var->yres_virtual);
 928        } else {
 929                var->xres_virtual = (var->xres_virtual + 15) & ~15;
 930                if (var->xres_virtual * nom / den * var->yres_virtual > info->fix.smem_len) {
 931                        printk(KERN_ERR PFX
 932                               "mode %dx%dx%d rejected...resolution too high to fit into video memory!\n",
 933                               var->xres, var->yres, var->bits_per_pixel);
 934                        NVTRACE("EXIT - EINVAL error\n");
 935                        return -EINVAL;
 936                }
 937        }
 938        
 939        if (var->xres_virtual * nom / den >= 8192) {
 940                printk(KERN_WARNING PFX
 941                       "virtual X resolution (%d) is too high, lowering to %d\n",
 942                       var->xres_virtual, 8192 * den / nom - 16);
 943                var->xres_virtual = 8192 * den / nom - 16;
 944        }
 945        
 946        if (var->xres_virtual < var->xres) {
 947                printk(KERN_ERR PFX
 948                       "virtual X resolution (%d) is smaller than real\n", var->xres_virtual);
 949                return -EINVAL;
 950        }
 951
 952        if (var->yres_virtual < var->yres) {
 953                printk(KERN_ERR PFX
 954                       "virtual Y resolution (%d) is smaller than real\n", var->yres_virtual);
 955                return -EINVAL;
 956        }
 957        if (var->yres_virtual > 0x7fff/nom)
 958                var->yres_virtual = 0x7fff/nom;
 959        if (var->xres_virtual > 0x7fff/nom)
 960                var->xres_virtual = 0x7fff/nom;
 961        NVTRACE_LEAVE();
 962        return 0;
 963}
 964
 965static void
 966riva_set_pattern(struct riva_par *par, int clr0, int clr1, int pat0, int pat1)
 967{
 968        RIVA_FIFO_FREE(par->riva, Patt, 4);
 969        NV_WR32(&par->riva.Patt->Color0, 0, clr0);
 970        NV_WR32(&par->riva.Patt->Color1, 0, clr1);
 971        NV_WR32(par->riva.Patt->Monochrome, 0, pat0);
 972        NV_WR32(par->riva.Patt->Monochrome, 4, pat1);
 973}
 974
 975/* acceleration routines */
 976static inline void wait_for_idle(struct riva_par *par)
 977{
 978        while (par->riva.Busy(&par->riva));
 979}
 980
 981/*
 982 * Set ROP.  Translate X rop into ROP3.  Internal routine.
 983 */
 984static void
 985riva_set_rop_solid(struct riva_par *par, int rop)
 986{
 987        riva_set_pattern(par, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF);
 988        RIVA_FIFO_FREE(par->riva, Rop, 1);
 989        NV_WR32(&par->riva.Rop->Rop3, 0, rop);
 990
 991}
 992
 993static void riva_setup_accel(struct fb_info *info)
 994{
 995        struct riva_par *par = info->par;
 996
 997        RIVA_FIFO_FREE(par->riva, Clip, 2);
 998        NV_WR32(&par->riva.Clip->TopLeft, 0, 0x0);
 999        NV_WR32(&par->riva.Clip->WidthHeight, 0,
1000                (info->var.xres_virtual & 0xffff) |
1001                (info->var.yres_virtual << 16));
1002        riva_set_rop_solid(par, 0xcc);
1003        wait_for_idle(par);
1004}
1005
1006/**
1007 * riva_get_cmap_len - query current color map length
1008 * @var: standard kernel fb changeable data
1009 *
1010 * DESCRIPTION:
1011 * Get current color map length.
1012 *
1013 * RETURNS:
1014 * Length of color map
1015 *
1016 * CALLED FROM:
1017 * rivafb_setcolreg()
1018 */
1019static int riva_get_cmap_len(const struct fb_var_screeninfo *var)
1020{
1021        int rc = 256;           /* reasonable default */
1022
1023        switch (var->green.length) {
1024        case 8:
1025                rc = 256;       /* 256 entries (2^8), 8 bpp and RGB8888 */
1026                break;
1027        case 5:
1028                rc = 32;        /* 32 entries (2^5), 16 bpp, RGB555 */
1029                break;
1030        case 6:
1031                rc = 64;        /* 64 entries (2^6), 16 bpp, RGB565 */
1032                break;          
1033        default:
1034                /* should not occur */
1035                break;
1036        }
1037        return rc;
1038}
1039
1040/* ------------------------------------------------------------------------- *
1041 *
1042 * framebuffer operations
1043 *
1044 * ------------------------------------------------------------------------- */
1045
1046static int rivafb_open(struct fb_info *info, int user)
1047{
1048        struct riva_par *par = info->par;
1049
1050        NVTRACE_ENTER();
1051        mutex_lock(&par->open_lock);
1052        if (!par->ref_count) {
1053#ifdef CONFIG_X86
1054                memset(&par->state, 0, sizeof(struct vgastate));
1055                par->state.flags = VGA_SAVE_MODE  | VGA_SAVE_FONTS;
1056                /* save the DAC for Riva128 */
1057                if (par->riva.Architecture == NV_ARCH_03)
1058                        par->state.flags |= VGA_SAVE_CMAP;
1059                save_vga(&par->state);
1060#endif
1061                /* vgaHWunlock() + riva unlock (0x7F) */
1062                CRTCout(par, 0x11, 0xFF);
1063                par->riva.LockUnlock(&par->riva, 0);
1064        
1065                riva_save_state(par, &par->initial_state);
1066        }
1067        par->ref_count++;
1068        mutex_unlock(&par->open_lock);
1069        NVTRACE_LEAVE();
1070        return 0;
1071}
1072
1073static int rivafb_release(struct fb_info *info, int user)
1074{
1075        struct riva_par *par = info->par;
1076
1077        NVTRACE_ENTER();
1078        mutex_lock(&par->open_lock);
1079        if (!par->ref_count) {
1080                mutex_unlock(&par->open_lock);
1081                return -EINVAL;
1082        }
1083        if (par->ref_count == 1) {
1084                par->riva.LockUnlock(&par->riva, 0);
1085                par->riva.LoadStateExt(&par->riva, &par->initial_state.ext);
1086                riva_load_state(par, &par->initial_state);
1087#ifdef CONFIG_X86
1088                restore_vga(&par->state);
1089#endif
1090                par->riva.LockUnlock(&par->riva, 1);
1091        }
1092        par->ref_count--;
1093        mutex_unlock(&par->open_lock);
1094        NVTRACE_LEAVE();
1095        return 0;
1096}
1097
1098static int rivafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1099{
1100        const struct fb_videomode *mode;
1101        struct riva_par *par = info->par;
1102        int nom, den;           /* translating from pixels->bytes */
1103        int mode_valid = 0;
1104        
1105        NVTRACE_ENTER();
1106        switch (var->bits_per_pixel) {
1107        case 1 ... 8:
1108                var->red.offset = var->green.offset = var->blue.offset = 0;
1109                var->red.length = var->green.length = var->blue.length = 8;
1110                var->bits_per_pixel = 8;
1111                nom = den = 1;
1112                break;
1113        case 9 ... 15:
1114                var->green.length = 5;
1115                /* fall through */
1116        case 16:
1117                var->bits_per_pixel = 16;
1118                /* The Riva128 supports RGB555 only */
1119                if (par->riva.Architecture == NV_ARCH_03)
1120                        var->green.length = 5;
1121                if (var->green.length == 5) {
1122                        /* 0rrrrrgg gggbbbbb */
1123                        var->red.offset = 10;
1124                        var->green.offset = 5;
1125                        var->blue.offset = 0;
1126                        var->red.length = 5;
1127                        var->green.length = 5;
1128                        var->blue.length = 5;
1129                } else {
1130                        /* rrrrrggg gggbbbbb */
1131                        var->red.offset = 11;
1132                        var->green.offset = 5;
1133                        var->blue.offset = 0;
1134                        var->red.length = 5;
1135                        var->green.length = 6;
1136                        var->blue.length = 5;
1137                }
1138                nom = 2;
1139                den = 1;
1140                break;
1141        case 17 ... 32:
1142                var->red.length = var->green.length = var->blue.length = 8;
1143                var->bits_per_pixel = 32;
1144                var->red.offset = 16;
1145                var->green.offset = 8;
1146                var->blue.offset = 0;
1147                nom = 4;
1148                den = 1;
1149                break;
1150        default:
1151                printk(KERN_ERR PFX
1152                       "mode %dx%dx%d rejected...color depth not supported.\n",
1153                       var->xres, var->yres, var->bits_per_pixel);
1154                NVTRACE("EXIT, returning -EINVAL\n");
1155                return -EINVAL;
1156        }
1157
1158        if (!strictmode) {
1159                if (!info->monspecs.vfmax || !info->monspecs.hfmax ||
1160                    !info->monspecs.dclkmax || !fb_validate_mode(var, info))
1161                        mode_valid = 1;
1162        }
1163
1164        /* calculate modeline if supported by monitor */
1165        if (!mode_valid && info->monspecs.gtf) {
1166                if (!fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1167                        mode_valid = 1;
1168        }
1169
1170        if (!mode_valid) {
1171                mode = fb_find_best_mode(var, &info->modelist);
1172                if (mode) {
1173                        riva_update_var(var, mode);
1174                        mode_valid = 1;
1175                }
1176        }
1177
1178        if (!mode_valid && info->monspecs.modedb_len)
1179                return -EINVAL;
1180
1181        if (var->xres_virtual < var->xres)
1182                var->xres_virtual = var->xres;
1183        if (var->yres_virtual <= var->yres)
1184                var->yres_virtual = -1;
1185        if (rivafb_do_maximize(info, var, nom, den) < 0)
1186                return -EINVAL;
1187
1188        if (var->xoffset < 0)
1189                var->xoffset = 0;
1190        if (var->yoffset < 0)
1191                var->yoffset = 0;
1192
1193        /* truncate xoffset and yoffset to maximum if too high */
1194        if (var->xoffset > var->xres_virtual - var->xres)
1195                var->xoffset = var->xres_virtual - var->xres - 1;
1196
1197        if (var->yoffset > var->yres_virtual - var->yres)
1198                var->yoffset = var->yres_virtual - var->yres - 1;
1199
1200        var->red.msb_right = 
1201            var->green.msb_right =
1202            var->blue.msb_right =
1203            var->transp.offset = var->transp.length = var->transp.msb_right = 0;
1204        NVTRACE_LEAVE();
1205        return 0;
1206}
1207
1208static int rivafb_set_par(struct fb_info *info)
1209{
1210        struct riva_par *par = info->par;
1211        int rc = 0;
1212
1213        NVTRACE_ENTER();
1214        /* vgaHWunlock() + riva unlock (0x7F) */
1215        CRTCout(par, 0x11, 0xFF);
1216        par->riva.LockUnlock(&par->riva, 0);
1217        rc = riva_load_video_mode(info);
1218        if (rc)
1219                goto out;
1220        if(!(info->flags & FBINFO_HWACCEL_DISABLED))
1221                riva_setup_accel(info);
1222        
1223        par->cursor_reset = 1;
1224        info->fix.line_length = (info->var.xres_virtual * (info->var.bits_per_pixel >> 3));
1225        info->fix.visual = (info->var.bits_per_pixel == 8) ?
1226                                FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
1227
1228        if (info->flags & FBINFO_HWACCEL_DISABLED)
1229                info->pixmap.scan_align = 1;
1230        else
1231                info->pixmap.scan_align = 4;
1232
1233out:
1234        NVTRACE_LEAVE();
1235        return rc;
1236}
1237
1238/**
1239 * rivafb_pan_display
1240 * @var: standard kernel fb changeable data
1241 * @con: TODO
1242 * @info: pointer to fb_info object containing info for current riva board
1243 *
1244 * DESCRIPTION:
1245 * Pan (or wrap, depending on the `vmode' field) the display using the
1246 * `xoffset' and `yoffset' fields of the `var' structure.
1247 * If the values don't fit, return -EINVAL.
1248 *
1249 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
1250 */
1251static int rivafb_pan_display(struct fb_var_screeninfo *var,
1252                              struct fb_info *info)
1253{
1254        struct riva_par *par = info->par;
1255        unsigned int base;
1256
1257        NVTRACE_ENTER();
1258        base = var->yoffset * info->fix.line_length + var->xoffset;
1259        par->riva.SetStartAddress(&par->riva, base);
1260        NVTRACE_LEAVE();
1261        return 0;
1262}
1263
1264static int rivafb_blank(int blank, struct fb_info *info)
1265{
1266        struct riva_par *par= info->par;
1267        unsigned char tmp, vesa;
1268
1269        tmp = SEQin(par, 0x01) & ~0x20; /* screen on/off */
1270        vesa = CRTCin(par, 0x1a) & ~0xc0;       /* sync on/off */
1271
1272        NVTRACE_ENTER();
1273
1274        if (blank)
1275                tmp |= 0x20;
1276
1277        switch (blank) {
1278        case FB_BLANK_UNBLANK:
1279        case FB_BLANK_NORMAL:
1280                break;
1281        case FB_BLANK_VSYNC_SUSPEND:
1282                vesa |= 0x80;
1283                break;
1284        case FB_BLANK_HSYNC_SUSPEND:
1285                vesa |= 0x40;
1286                break;
1287        case FB_BLANK_POWERDOWN:
1288                vesa |= 0xc0;
1289                break;
1290        }
1291
1292        SEQout(par, 0x01, tmp);
1293        CRTCout(par, 0x1a, vesa);
1294
1295        NVTRACE_LEAVE();
1296
1297        return 0;
1298}
1299
1300/**
1301 * rivafb_setcolreg
1302 * @regno: register index
1303 * @red: red component
1304 * @green: green component
1305 * @blue: blue component
1306 * @transp: transparency
1307 * @info: pointer to fb_info object containing info for current riva board
1308 *
1309 * DESCRIPTION:
1310 * Set a single color register. The values supplied have a 16 bit
1311 * magnitude.
1312 *
1313 * RETURNS:
1314 * Return != 0 for invalid regno.
1315 *
1316 * CALLED FROM:
1317 * fbcmap.c:fb_set_cmap()
1318 */
1319static int rivafb_setcolreg(unsigned regno, unsigned red, unsigned green,
1320                          unsigned blue, unsigned transp,
1321                          struct fb_info *info)
1322{
1323        struct riva_par *par = info->par;
1324        RIVA_HW_INST *chip = &par->riva;
1325        int i;
1326
1327        if (regno >= riva_get_cmap_len(&info->var))
1328                        return -EINVAL;
1329
1330        if (info->var.grayscale) {
1331                /* gray = 0.30*R + 0.59*G + 0.11*B */
1332                red = green = blue =
1333                    (red * 77 + green * 151 + blue * 28) >> 8;
1334        }
1335
1336        if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
1337                ((u32 *) info->pseudo_palette)[regno] =
1338                        (regno << info->var.red.offset) |
1339                        (regno << info->var.green.offset) |
1340                        (regno << info->var.blue.offset);
1341                /*
1342                 * The Riva128 2D engine requires color information in
1343                 * TrueColor format even if framebuffer is in DirectColor
1344                 */
1345                if (par->riva.Architecture == NV_ARCH_03) {
1346                        switch (info->var.bits_per_pixel) {
1347                        case 16:
1348                                par->palette[regno] = ((red & 0xf800) >> 1) |
1349                                        ((green & 0xf800) >> 6) |
1350                                        ((blue & 0xf800) >> 11);
1351                                break;
1352                        case 32:
1353                                par->palette[regno] = ((red & 0xff00) << 8) |
1354                                        ((green & 0xff00)) |
1355                                        ((blue & 0xff00) >> 8);
1356                                break;
1357                        }
1358                }
1359        }
1360
1361        switch (info->var.bits_per_pixel) {
1362        case 8:
1363                /* "transparent" stuff is completely ignored. */
1364                riva_wclut(chip, regno, red >> 8, green >> 8, blue >> 8);
1365                break;
1366        case 16:
1367                if (info->var.green.length == 5) {
1368                        for (i = 0; i < 8; i++) {
1369                                riva_wclut(chip, regno*8+i, red >> 8,
1370                                           green >> 8, blue >> 8);
1371                        }
1372                } else {
1373                        u8 r, g, b;
1374
1375                        if (regno < 32) {
1376                                for (i = 0; i < 8; i++) {
1377                                        riva_wclut(chip, regno*8+i,
1378                                                   red >> 8, green >> 8,
1379                                                   blue >> 8);
1380                                }
1381                        }
1382                        riva_rclut(chip, regno*4, &r, &g, &b);
1383                        for (i = 0; i < 4; i++)
1384                                riva_wclut(chip, regno*4+i, r,
1385                                           green >> 8, b);
1386                }
1387                break;
1388        case 32:
1389                riva_wclut(chip, regno, red >> 8, green >> 8, blue >> 8);
1390                break;
1391        default:
1392                /* do nothing */
1393                break;
1394        }
1395        return 0;
1396}
1397
1398/**
1399 * rivafb_fillrect - hardware accelerated color fill function
1400 * @info: pointer to fb_info structure
1401 * @rect: pointer to fb_fillrect structure
1402 *
1403 * DESCRIPTION:
1404 * This function fills up a region of framebuffer memory with a solid
1405 * color with a choice of two different ROP's, copy or invert.
1406 *
1407 * CALLED FROM:
1408 * framebuffer hook
1409 */
1410static void rivafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1411{
1412        struct riva_par *par = info->par;
1413        u_int color, rop = 0;
1414
1415        if ((info->flags & FBINFO_HWACCEL_DISABLED)) {
1416                cfb_fillrect(info, rect);
1417                return;
1418        }
1419
1420        if (info->var.bits_per_pixel == 8)
1421                color = rect->color;
1422        else {
1423                if (par->riva.Architecture != NV_ARCH_03)
1424                        color = ((u32 *)info->pseudo_palette)[rect->color];
1425                else
1426                        color = par->palette[rect->color];
1427        }
1428
1429        switch (rect->rop) {
1430        case ROP_XOR:
1431                rop = 0x66;
1432                break;
1433        case ROP_COPY:
1434        default:
1435                rop = 0xCC;
1436                break;
1437        }
1438
1439        riva_set_rop_solid(par, rop);
1440
1441        RIVA_FIFO_FREE(par->riva, Bitmap, 1);
1442        NV_WR32(&par->riva.Bitmap->Color1A, 0, color);
1443
1444        RIVA_FIFO_FREE(par->riva, Bitmap, 2);
1445        NV_WR32(&par->riva.Bitmap->UnclippedRectangle[0].TopLeft, 0,
1446                (rect->dx << 16) | rect->dy);
1447        mb();
1448        NV_WR32(&par->riva.Bitmap->UnclippedRectangle[0].WidthHeight, 0,
1449                (rect->width << 16) | rect->height);
1450        mb();
1451        riva_set_rop_solid(par, 0xcc);
1452
1453}
1454
1455/**
1456 * rivafb_copyarea - hardware accelerated blit function
1457 * @info: pointer to fb_info structure
1458 * @region: pointer to fb_copyarea structure
1459 *
1460 * DESCRIPTION:
1461 * This copies an area of pixels from one location to another
1462 *
1463 * CALLED FROM:
1464 * framebuffer hook
1465 */
1466static void rivafb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
1467{
1468        struct riva_par *par = info->par;
1469
1470        if ((info->flags & FBINFO_HWACCEL_DISABLED)) {
1471                cfb_copyarea(info, region);
1472                return;
1473        }
1474
1475        RIVA_FIFO_FREE(par->riva, Blt, 3);
1476        NV_WR32(&par->riva.Blt->TopLeftSrc, 0,
1477                (region->sy << 16) | region->sx);
1478        NV_WR32(&par->riva.Blt->TopLeftDst, 0,
1479                (region->dy << 16) | region->dx);
1480        mb();
1481        NV_WR32(&par->riva.Blt->WidthHeight, 0,
1482                (region->height << 16) | region->width);
1483        mb();
1484}
1485
1486static inline void convert_bgcolor_16(u32 *col)
1487{
1488        *col = ((*col & 0x0000F800) << 8)
1489                | ((*col & 0x00007E0) << 5)
1490                | ((*col & 0x0000001F) << 3)
1491                |          0xFF000000;
1492        mb();
1493}
1494
1495/**
1496 * rivafb_imageblit: hardware accelerated color expand function
1497 * @info: pointer to fb_info structure
1498 * @image: pointer to fb_image structure
1499 *
1500 * DESCRIPTION:
1501 * If the source is a monochrome bitmap, the function fills up a a region
1502 * of framebuffer memory with pixels whose color is determined by the bit
1503 * setting of the bitmap, 1 - foreground, 0 - background.
1504 *
1505 * If the source is not a monochrome bitmap, color expansion is not done.
1506 * In this case, it is channeled to a software function.
1507 *
1508 * CALLED FROM:
1509 * framebuffer hook
1510 */
1511static void rivafb_imageblit(struct fb_info *info, 
1512                             const struct fb_image *image)
1513{
1514        struct riva_par *par = info->par;
1515        u32 fgx = 0, bgx = 0, width, tmp;
1516        u8 *cdat = (u8 *) image->data;
1517        volatile u32 __iomem *d;
1518        int i, size;
1519
1520        if ((info->flags & FBINFO_HWACCEL_DISABLED) || image->depth != 1) {
1521                cfb_imageblit(info, image);
1522                return;
1523        }
1524
1525        switch (info->var.bits_per_pixel) {
1526        case 8:
1527                fgx = image->fg_color;
1528                bgx = image->bg_color;
1529                break;
1530        case 16:
1531        case 32:
1532                if (par->riva.Architecture != NV_ARCH_03) {
1533                        fgx = ((u32 *)info->pseudo_palette)[image->fg_color];
1534                        bgx = ((u32 *)info->pseudo_palette)[image->bg_color];
1535                } else {
1536                        fgx = par->palette[image->fg_color];
1537                        bgx = par->palette[image->bg_color];
1538                }
1539                if (info->var.green.length == 6)
1540                        convert_bgcolor_16(&bgx);       
1541                break;
1542        }
1543
1544        RIVA_FIFO_FREE(par->riva, Bitmap, 7);
1545        NV_WR32(&par->riva.Bitmap->ClipE.TopLeft, 0,
1546                (image->dy << 16) | (image->dx & 0xFFFF));
1547        NV_WR32(&par->riva.Bitmap->ClipE.BottomRight, 0,
1548                (((image->dy + image->height) << 16) |
1549                 ((image->dx + image->width) & 0xffff)));
1550        NV_WR32(&par->riva.Bitmap->Color0E, 0, bgx);
1551        NV_WR32(&par->riva.Bitmap->Color1E, 0, fgx);
1552        NV_WR32(&par->riva.Bitmap->WidthHeightInE, 0,
1553                (image->height << 16) | ((image->width + 31) & ~31));
1554        NV_WR32(&par->riva.Bitmap->WidthHeightOutE, 0,
1555                (image->height << 16) | ((image->width + 31) & ~31));
1556        NV_WR32(&par->riva.Bitmap->PointE, 0,
1557                (image->dy << 16) | (image->dx & 0xFFFF));
1558
1559        d = &par->riva.Bitmap->MonochromeData01E;
1560
1561        width = (image->width + 31)/32;
1562        size = width * image->height;
1563        while (size >= 16) {
1564                RIVA_FIFO_FREE(par->riva, Bitmap, 16);
1565                for (i = 0; i < 16; i++) {
1566                        tmp = *((u32 *)cdat);
1567                        cdat = (u8 *)((u32 *)cdat + 1);
1568                        reverse_order(&tmp);
1569                        NV_WR32(d, i*4, tmp);
1570                }
1571                size -= 16;
1572        }
1573        if (size) {
1574                RIVA_FIFO_FREE(par->riva, Bitmap, size);
1575                for (i = 0; i < size; i++) {
1576                        tmp = *((u32 *) cdat);
1577                        cdat = (u8 *)((u32 *)cdat + 1);
1578                        reverse_order(&tmp);
1579                        NV_WR32(d, i*4, tmp);
1580                }
1581        }
1582}
1583
1584/**
1585 * rivafb_cursor - hardware cursor function
1586 * @info: pointer to info structure
1587 * @cursor: pointer to fbcursor structure
1588 *
1589 * DESCRIPTION:
1590 * A cursor function that supports displaying a cursor image via hardware.
1591 * Within the kernel, copy and invert rops are supported.  If exported
1592 * to user space, only the copy rop will be supported.
1593 *
1594 * CALLED FROM
1595 * framebuffer hook
1596 */
1597static int rivafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1598{
1599        struct riva_par *par = info->par;
1600        u8 data[MAX_CURS * MAX_CURS/8];
1601        int i, set = cursor->set;
1602        u16 fg, bg;
1603
1604        if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
1605                return -ENXIO;
1606
1607        par->riva.ShowHideCursor(&par->riva, 0);
1608
1609        if (par->cursor_reset) {
1610                set = FB_CUR_SETALL;
1611                par->cursor_reset = 0;
1612        }
1613
1614        if (set & FB_CUR_SETSIZE)
1615                memset_io(par->riva.CURSOR, 0, MAX_CURS * MAX_CURS * 2);
1616
1617        if (set & FB_CUR_SETPOS) {
1618                u32 xx, yy, temp;
1619
1620                yy = cursor->image.dy - info->var.yoffset;
1621                xx = cursor->image.dx - info->var.xoffset;
1622                temp = xx & 0xFFFF;
1623                temp |= yy << 16;
1624
1625                NV_WR32(par->riva.PRAMDAC, 0x0000300, temp);
1626        }
1627
1628
1629        if (set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
1630                u32 bg_idx = cursor->image.bg_color;
1631                u32 fg_idx = cursor->image.fg_color;
1632                u32 s_pitch = (cursor->image.width+7) >> 3;
1633                u32 d_pitch = MAX_CURS/8;
1634                u8 *dat = (u8 *) cursor->image.data;
1635                u8 *msk = (u8 *) cursor->mask;
1636                u8 *src;
1637                
1638                src = kmalloc(s_pitch * cursor->image.height, GFP_ATOMIC);
1639
1640                if (src) {
1641                        switch (cursor->rop) {
1642                        case ROP_XOR:
1643                                for (i = 0; i < s_pitch * cursor->image.height; i++)
1644                                        src[i] = dat[i] ^ msk[i];
1645                                break;
1646                        case ROP_COPY:
1647                        default:
1648                                for (i = 0; i < s_pitch * cursor->image.height; i++)
1649                                        src[i] = dat[i] & msk[i];
1650                                break;
1651                        }
1652
1653                        fb_pad_aligned_buffer(data, d_pitch, src, s_pitch,
1654                                                cursor->image.height);
1655
1656                        bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1657                                ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1658                                ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1659                                1 << 15;
1660
1661                        fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1662                                ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1663                                ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1664                                1 << 15;
1665
1666                        par->riva.LockUnlock(&par->riva, 0);
1667
1668                        rivafb_load_cursor_image(par, data, bg, fg,
1669                                                 cursor->image.width,
1670                                                 cursor->image.height);
1671                        kfree(src);
1672                }
1673        }
1674
1675        if (cursor->enable)
1676                par->riva.ShowHideCursor(&par->riva, 1);
1677
1678        return 0;
1679}
1680
1681static int rivafb_sync(struct fb_info *info)
1682{
1683        struct riva_par *par = info->par;
1684
1685        wait_for_idle(par);
1686        return 0;
1687}
1688
1689/* ------------------------------------------------------------------------- *
1690 *
1691 * initialization helper functions
1692 *
1693 * ------------------------------------------------------------------------- */
1694
1695/* kernel interface */
1696static struct fb_ops riva_fb_ops = {
1697        .owner          = THIS_MODULE,
1698        .fb_open        = rivafb_open,
1699        .fb_release     = rivafb_release,
1700        .fb_check_var   = rivafb_check_var,
1701        .fb_set_par     = rivafb_set_par,
1702        .fb_setcolreg   = rivafb_setcolreg,
1703        .fb_pan_display = rivafb_pan_display,
1704        .fb_blank       = rivafb_blank,
1705        .fb_fillrect    = rivafb_fillrect,
1706        .fb_copyarea    = rivafb_copyarea,
1707        .fb_imageblit   = rivafb_imageblit,
1708        .fb_cursor      = rivafb_cursor,        
1709        .fb_sync        = rivafb_sync,
1710};
1711
1712static int __devinit riva_set_fbinfo(struct fb_info *info)
1713{
1714        unsigned int cmap_len;
1715        struct riva_par *par = info->par;
1716
1717        NVTRACE_ENTER();
1718        info->flags = FBINFO_DEFAULT
1719                    | FBINFO_HWACCEL_XPAN
1720                    | FBINFO_HWACCEL_YPAN
1721                    | FBINFO_HWACCEL_COPYAREA
1722                    | FBINFO_HWACCEL_FILLRECT
1723                    | FBINFO_HWACCEL_IMAGEBLIT;
1724
1725        /* Accel seems to not work properly on NV30 yet...*/
1726        if ((par->riva.Architecture == NV_ARCH_30) || noaccel) {
1727                printk(KERN_DEBUG PFX "disabling acceleration\n");
1728                info->flags |= FBINFO_HWACCEL_DISABLED;
1729        }
1730
1731        info->var = rivafb_default_var;
1732        info->fix.visual = (info->var.bits_per_pixel == 8) ?
1733                                FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
1734
1735        info->pseudo_palette = par->pseudo_palette;
1736
1737        cmap_len = riva_get_cmap_len(&info->var);
1738        fb_alloc_cmap(&info->cmap, cmap_len, 0);        
1739
1740        info->pixmap.size = 8 * 1024;
1741        info->pixmap.buf_align = 4;
1742        info->pixmap.access_align = 32;
1743        info->pixmap.flags = FB_PIXMAP_SYSTEM;
1744        info->var.yres_virtual = -1;
1745        NVTRACE_LEAVE();
1746        return (rivafb_check_var(&info->var, info));
1747}
1748
1749#ifdef CONFIG_PPC_OF
1750static int __devinit riva_get_EDID_OF(struct fb_info *info, struct pci_dev *pd)
1751{
1752        struct riva_par *par = info->par;
1753        struct device_node *dp;
1754        const unsigned char *pedid = NULL;
1755        const unsigned char *disptype = NULL;
1756        static char *propnames[] = {
1757                "DFP,EDID", "LCD,EDID", "EDID", "EDID1", "EDID,B", "EDID,A", NULL };
1758        int i;
1759
1760        NVTRACE_ENTER();
1761        dp = pci_device_to_OF_node(pd);
1762        for (; dp != NULL; dp = dp->child) {
1763                disptype = of_get_property(dp, "display-type", NULL);
1764                if (disptype == NULL)
1765                        continue;
1766                if (strncmp(disptype, "LCD", 3) != 0)
1767                        continue;
1768                for (i = 0; propnames[i] != NULL; ++i) {
1769                        pedid = of_get_property(dp, propnames[i], NULL);
1770                        if (pedid != NULL) {
1771                                par->EDID = (unsigned char *)pedid;
1772                                NVTRACE("LCD found.\n");
1773                                return 1;
1774                        }
1775                }
1776        }
1777        NVTRACE_LEAVE();
1778        return 0;
1779}
1780#endif /* CONFIG_PPC_OF */
1781
1782#if defined(CONFIG_FB_RIVA_I2C) && !defined(CONFIG_PPC_OF)
1783static int __devinit riva_get_EDID_i2c(struct fb_info *info)
1784{
1785        struct riva_par *par = info->par;
1786        struct fb_var_screeninfo var;
1787        int i;
1788
1789        NVTRACE_ENTER();
1790        riva_create_i2c_busses(par);
1791        for (i = 0; i < 3; i++) {
1792                if (!par->chan[i].par)
1793                        continue;
1794                riva_probe_i2c_connector(par, i, &par->EDID);
1795                if (par->EDID && !fb_parse_edid(par->EDID, &var)) {
1796                        printk(PFX "Found EDID Block from BUS %i\n", i);
1797                        break;
1798                }
1799        }
1800
1801        NVTRACE_LEAVE();
1802        return (par->EDID) ? 1 : 0;
1803}
1804#endif /* CONFIG_FB_RIVA_I2C */
1805
1806static void __devinit riva_update_default_var(struct fb_var_screeninfo *var,
1807                                              struct fb_info *info)
1808{
1809        struct fb_monspecs *specs = &info->monspecs;
1810        struct fb_videomode modedb;
1811
1812        NVTRACE_ENTER();
1813        /* respect mode options */
1814        if (mode_option) {
1815                fb_find_mode(var, info, mode_option,
1816                             specs->modedb, specs->modedb_len,
1817                             NULL, 8);
1818        } else if (specs->modedb != NULL) {
1819                /* get first mode in database as fallback */
1820                modedb = specs->modedb[0];
1821                /* get preferred timing */
1822                if (info->monspecs.misc & FB_MISC_1ST_DETAIL) {
1823                        int i;
1824
1825                        for (i = 0; i < specs->modedb_len; i++) {
1826                                if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1827                                        modedb = specs->modedb[i];
1828                                        break;
1829                                }
1830                        }
1831                }
1832                var->bits_per_pixel = 8;
1833                riva_update_var(var, &modedb);
1834        }
1835        NVTRACE_LEAVE();
1836}
1837
1838
1839static void __devinit riva_get_EDID(struct fb_info *info, struct pci_dev *pdev)
1840{
1841        NVTRACE_ENTER();
1842#ifdef CONFIG_PPC_OF
1843        if (!riva_get_EDID_OF(info, pdev))
1844                printk(PFX "could not retrieve EDID from OF\n");
1845#elif defined(CONFIG_FB_RIVA_I2C)
1846        if (!riva_get_EDID_i2c(info))
1847                printk(PFX "could not retrieve EDID from DDC/I2C\n");
1848#endif
1849        NVTRACE_LEAVE();
1850}
1851
1852
1853static void __devinit riva_get_edidinfo(struct fb_info *info)
1854{
1855        struct fb_var_screeninfo *var = &rivafb_default_var;
1856        struct riva_par *par = info->par;
1857
1858        fb_edid_to_monspecs(par->EDID, &info->monspecs);
1859        fb_videomode_to_modelist(info->monspecs.modedb, info->monspecs.modedb_len,
1860                                 &info->modelist);
1861        riva_update_default_var(var, info);
1862
1863        /* if user specified flatpanel, we respect that */
1864        if (info->monspecs.input & FB_DISP_DDI)
1865                par->FlatPanel = 1;
1866}
1867
1868/* ------------------------------------------------------------------------- *
1869 *
1870 * PCI bus
1871 *
1872 * ------------------------------------------------------------------------- */
1873
1874static u32 __devinit riva_get_arch(struct pci_dev *pd)
1875{
1876        u32 arch = 0;
1877
1878        switch (pd->device & 0x0ff0) {
1879                case 0x0100:   /* GeForce 256 */
1880                case 0x0110:   /* GeForce2 MX */
1881                case 0x0150:   /* GeForce2 */
1882                case 0x0170:   /* GeForce4 MX */
1883                case 0x0180:   /* GeForce4 MX (8x AGP) */
1884                case 0x01A0:   /* nForce */
1885                case 0x01F0:   /* nForce2 */
1886                     arch =  NV_ARCH_10;
1887                     break;
1888                case 0x0200:   /* GeForce3 */
1889                case 0x0250:   /* GeForce4 Ti */
1890                case 0x0280:   /* GeForce4 Ti (8x AGP) */
1891                     arch =  NV_ARCH_20;
1892                     break;
1893                case 0x0300:   /* GeForceFX 5800 */
1894                case 0x0310:   /* GeForceFX 5600 */
1895                case 0x0320:   /* GeForceFX 5200 */
1896                case 0x0330:   /* GeForceFX 5900 */
1897                case 0x0340:   /* GeForceFX 5700 */
1898                     arch =  NV_ARCH_30;
1899                     break;
1900                case 0x0020:   /* TNT, TNT2 */
1901                     arch =  NV_ARCH_04;
1902                     break;
1903                case 0x0010:   /* Riva128 */
1904                     arch =  NV_ARCH_03;
1905                     break;
1906                default:   /* unknown architecture */
1907                     break;
1908        }
1909        return arch;
1910}
1911
1912static int __devinit rivafb_probe(struct pci_dev *pd,
1913                                const struct pci_device_id *ent)
1914{
1915        struct riva_par *default_par;
1916        struct fb_info *info;
1917        int ret;
1918
1919        NVTRACE_ENTER();
1920        assert(pd != NULL);
1921
1922        info = framebuffer_alloc(sizeof(struct riva_par), &pd->dev);
1923        if (!info) {
1924                printk (KERN_ERR PFX "could not allocate memory\n");
1925                ret = -ENOMEM;
1926                goto err_ret;
1927        }
1928        default_par = info->par;
1929        default_par->pdev = pd;
1930
1931        info->pixmap.addr = kzalloc(8 * 1024, GFP_KERNEL);
1932        if (info->pixmap.addr == NULL) {
1933                ret = -ENOMEM;
1934                goto err_framebuffer_release;
1935        }
1936
1937        ret = pci_enable_device(pd);
1938        if (ret < 0) {
1939                printk(KERN_ERR PFX "cannot enable PCI device\n");
1940                goto err_free_pixmap;
1941        }
1942
1943        ret = pci_request_regions(pd, "rivafb");
1944        if (ret < 0) {
1945                printk(KERN_ERR PFX "cannot request PCI regions\n");
1946                goto err_disable_device;
1947        }
1948
1949        mutex_init(&default_par->open_lock);
1950        default_par->riva.Architecture = riva_get_arch(pd);
1951
1952        default_par->Chipset = (pd->vendor << 16) | pd->device;
1953        printk(KERN_INFO PFX "nVidia device/chipset %X\n",default_par->Chipset);
1954        
1955        if(default_par->riva.Architecture == 0) {
1956                printk(KERN_ERR PFX "unknown NV_ARCH\n");
1957                ret=-ENODEV;
1958                goto err_release_region;
1959        }
1960        if(default_par->riva.Architecture == NV_ARCH_10 ||
1961           default_par->riva.Architecture == NV_ARCH_20 ||
1962           default_par->riva.Architecture == NV_ARCH_30) {
1963                sprintf(rivafb_fix.id, "NV%x", (pd->device & 0x0ff0) >> 4);
1964        } else {
1965                sprintf(rivafb_fix.id, "NV%x", default_par->riva.Architecture);
1966        }
1967
1968        default_par->FlatPanel = flatpanel;
1969        if (flatpanel == 1)
1970                printk(KERN_INFO PFX "flatpanel support enabled\n");
1971        default_par->forceCRTC = forceCRTC;
1972        
1973        rivafb_fix.mmio_len = pci_resource_len(pd, 0);
1974        rivafb_fix.smem_len = pci_resource_len(pd, 1);
1975
1976        {
1977                /* enable IO and mem if not already done */
1978                unsigned short cmd;
1979
1980                pci_read_config_word(pd, PCI_COMMAND, &cmd);
1981                cmd |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
1982                pci_write_config_word(pd, PCI_COMMAND, cmd);
1983        }
1984        
1985        rivafb_fix.mmio_start = pci_resource_start(pd, 0);
1986        rivafb_fix.smem_start = pci_resource_start(pd, 1);
1987
1988        default_par->ctrl_base = ioremap(rivafb_fix.mmio_start,
1989                                         rivafb_fix.mmio_len);
1990        if (!default_par->ctrl_base) {
1991                printk(KERN_ERR PFX "cannot ioremap MMIO base\n");
1992                ret = -EIO;
1993                goto err_release_region;
1994        }
1995
1996        switch (default_par->riva.Architecture) {
1997        case NV_ARCH_03:
1998                /* Riva128's PRAMIN is in the "framebuffer" space
1999                 * Since these cards were never made with more than 8 megabytes
2000                 * we can safely allocate this separately.
2001                 */
2002                default_par->riva.PRAMIN = ioremap(rivafb_fix.smem_start + 0x00C00000, 0x00008000);
2003                if (!default_par->riva.PRAMIN) {
2004                        printk(KERN_ERR PFX "cannot ioremap PRAMIN region\n");
2005                        ret = -EIO;
2006                        goto err_iounmap_ctrl_base;
2007                }
2008                break;
2009        case NV_ARCH_04:
2010        case NV_ARCH_10:
2011        case NV_ARCH_20:
2012        case NV_ARCH_30:
2013                default_par->riva.PCRTC0 =
2014                        (u32 __iomem *)(default_par->ctrl_base + 0x00600000);
2015                default_par->riva.PRAMIN =
2016                        (u32 __iomem *)(default_par->ctrl_base + 0x00710000);
2017                break;
2018        }
2019        riva_common_setup(default_par);
2020
2021        if (default_par->riva.Architecture == NV_ARCH_03) {
2022                default_par->riva.PCRTC = default_par->riva.PCRTC0
2023                                        = default_par->riva.PGRAPH;
2024        }
2025
2026        rivafb_fix.smem_len = riva_get_memlen(default_par) * 1024;
2027        default_par->dclk_max = riva_get_maxdclk(default_par) * 1000;
2028        info->screen_base = ioremap(rivafb_fix.smem_start,
2029                                    rivafb_fix.smem_len);
2030        if (!info->screen_base) {
2031                printk(KERN_ERR PFX "cannot ioremap FB base\n");
2032                ret = -EIO;
2033                goto err_iounmap_pramin;
2034        }
2035
2036#ifdef CONFIG_MTRR
2037        if (!nomtrr) {
2038                default_par->mtrr.vram = mtrr_add(rivafb_fix.smem_start,
2039                                                  rivafb_fix.smem_len,
2040                                                  MTRR_TYPE_WRCOMB, 1);
2041                if (default_par->mtrr.vram < 0) {
2042                        printk(KERN_ERR PFX "unable to setup MTRR\n");
2043                } else {
2044                        default_par->mtrr.vram_valid = 1;
2045                        /* let there be speed */
2046                        printk(KERN_INFO PFX "RIVA MTRR set to ON\n");
2047                }
2048        }
2049#endif /* CONFIG_MTRR */
2050
2051        info->fbops = &riva_fb_ops;
2052        info->fix = rivafb_fix;
2053        riva_get_EDID(info, pd);
2054        riva_get_edidinfo(info);
2055
2056        ret=riva_set_fbinfo(info);
2057        if (ret < 0) {
2058                printk(KERN_ERR PFX "error setting initial video mode\n");
2059                goto err_iounmap_screen_base;
2060        }
2061
2062        fb_destroy_modedb(info->monspecs.modedb);
2063        info->monspecs.modedb = NULL;
2064
2065        pci_set_drvdata(pd, info);
2066
2067        if (backlight)
2068                riva_bl_init(info->par);
2069
2070        ret = register_framebuffer(info);
2071        if (ret < 0) {
2072                printk(KERN_ERR PFX
2073                        "error registering riva framebuffer\n");
2074                goto err_iounmap_screen_base;
2075        }
2076
2077        printk(KERN_INFO PFX
2078                "PCI nVidia %s framebuffer ver %s (%dMB @ 0x%lX)\n",
2079                info->fix.id,
2080                RIVAFB_VERSION,
2081                info->fix.smem_len / (1024 * 1024),
2082                info->fix.smem_start);
2083
2084        NVTRACE_LEAVE();
2085        return 0;
2086
2087err_iounmap_screen_base:
2088#ifdef CONFIG_FB_RIVA_I2C
2089        riva_delete_i2c_busses(info->par);
2090#endif
2091        iounmap(info->screen_base);
2092err_iounmap_pramin:
2093        if (default_par->riva.Architecture == NV_ARCH_03) 
2094                iounmap(default_par->riva.PRAMIN);
2095err_iounmap_ctrl_base:
2096        iounmap(default_par->ctrl_base);
2097err_release_region:
2098        pci_release_regions(pd);
2099err_disable_device:
2100err_free_pixmap:
2101        kfree(info->pixmap.addr);
2102err_framebuffer_release:
2103        framebuffer_release(info);
2104err_ret:
2105        return ret;
2106}
2107
2108static void __devexit rivafb_remove(struct pci_dev *pd)
2109{
2110        struct fb_info *info = pci_get_drvdata(pd);
2111        struct riva_par *par = info->par;
2112        
2113        NVTRACE_ENTER();
2114
2115#ifdef CONFIG_FB_RIVA_I2C
2116        riva_delete_i2c_busses(par);
2117        kfree(par->EDID);
2118#endif
2119
2120        unregister_framebuffer(info);
2121
2122        riva_bl_exit(info);
2123
2124#ifdef CONFIG_MTRR
2125        if (par->mtrr.vram_valid)
2126                mtrr_del(par->mtrr.vram, info->fix.smem_start,
2127                         info->fix.smem_len);
2128#endif /* CONFIG_MTRR */
2129
2130        iounmap(par->ctrl_base);
2131        iounmap(info->screen_base);
2132        if (par->riva.Architecture == NV_ARCH_03)
2133                iounmap(par->riva.PRAMIN);
2134        pci_release_regions(pd);
2135        kfree(info->pixmap.addr);
2136        framebuffer_release(info);
2137        pci_set_drvdata(pd, NULL);
2138        NVTRACE_LEAVE();
2139}
2140
2141/* ------------------------------------------------------------------------- *
2142 *
2143 * initialization
2144 *
2145 * ------------------------------------------------------------------------- */
2146
2147#ifndef MODULE
2148static int __devinit rivafb_setup(char *options)
2149{
2150        char *this_opt;
2151
2152        NVTRACE_ENTER();
2153        if (!options || !*options)
2154                return 0;
2155
2156        while ((this_opt = strsep(&options, ",")) != NULL) {
2157                if (!strncmp(this_opt, "forceCRTC", 9)) {
2158                        char *p;
2159                        
2160                        p = this_opt + 9;
2161                        if (!*p || !*(++p)) continue; 
2162                        forceCRTC = *p - '0';
2163                        if (forceCRTC < 0 || forceCRTC > 1) 
2164                                forceCRTC = -1;
2165                } else if (!strncmp(this_opt, "flatpanel", 9)) {
2166                        flatpanel = 1;
2167                } else if (!strncmp(this_opt, "backlight:", 10)) {
2168                        backlight = simple_strtoul(this_opt+10, NULL, 0);
2169#ifdef CONFIG_MTRR
2170                } else if (!strncmp(this_opt, "nomtrr", 6)) {
2171                        nomtrr = 1;
2172#endif
2173                } else if (!strncmp(this_opt, "strictmode", 10)) {
2174                        strictmode = 1;
2175                } else if (!strncmp(this_opt, "noaccel", 7)) {
2176                        noaccel = 1;
2177                } else
2178                        mode_option = this_opt;
2179        }
2180        NVTRACE_LEAVE();
2181        return 0;
2182}
2183#endif /* !MODULE */
2184
2185static struct pci_driver rivafb_driver = {
2186        .name           = "rivafb",
2187        .id_table       = rivafb_pci_tbl,
2188        .probe          = rivafb_probe,
2189        .remove         = __devexit_p(rivafb_remove),
2190};
2191
2192
2193
2194/* ------------------------------------------------------------------------- *
2195 *
2196 * modularization
2197 *
2198 * ------------------------------------------------------------------------- */
2199
2200static int __devinit rivafb_init(void)
2201{
2202#ifndef MODULE
2203        char *option = NULL;
2204
2205        if (fb_get_options("rivafb", &option))
2206                return -ENODEV;
2207        rivafb_setup(option);
2208#endif
2209        return pci_register_driver(&rivafb_driver);
2210}
2211
2212
2213module_init(rivafb_init);
2214
2215static void __exit rivafb_exit(void)
2216{
2217        pci_unregister_driver(&rivafb_driver);
2218}
2219
2220module_exit(rivafb_exit);
2221
2222module_param(noaccel, bool, 0);
2223MODULE_PARM_DESC(noaccel, "bool: disable acceleration");
2224module_param(flatpanel, int, 0);
2225MODULE_PARM_DESC(flatpanel, "Enables experimental flat panel support for some chipsets. (0 or 1=enabled) (default=0)");
2226module_param(forceCRTC, int, 0);
2227MODULE_PARM_DESC(forceCRTC, "Forces usage of a particular CRTC in case autodetection fails. (0 or 1) (default=autodetect)");
2228#ifdef CONFIG_MTRR
2229module_param(nomtrr, bool, 0);
2230MODULE_PARM_DESC(nomtrr, "Disables MTRR support (0 or 1=disabled) (default=0)");
2231#endif
2232module_param(strictmode, bool, 0);
2233MODULE_PARM_DESC(strictmode, "Only use video modes from EDID");
2234
2235MODULE_AUTHOR("Ani Joshi, maintainer");
2236MODULE_DESCRIPTION("Framebuffer driver for nVidia Riva 128, TNT, TNT2, and the GeForce series");
2237MODULE_LICENSE("GPL");
2238