drivers/video/fbdev/imsttfb.c

   1 /*
   2  *  drivers/video/imsttfb.c -- frame buffer device for IMS TwinTurbo
   3  *
   4  *  This file is derived from the powermac console "imstt" driver:
   5  *  Copyright (C) 1997 Sigurdur Asgeirsson
   6  *  With additional hacking by Jeffrey Kuskin ([email protected])
   7  *  Modified by Danilo Beuche 1998
   8  *  Some register values added by Damien Doligez, INRIA Rocquencourt
   9  *  Various cleanups by Paul Mundt ([email protected])
  10  *
  11  *  This file was written by Ryan Nielsen ([email protected])
  12  *  Most of the frame buffer device stuff was copied from atyfb.c
  13  *
  14  *  This file is subject to the terms and conditions of the GNU General Public
  15  *  License. See the file COPYING in the main directory of this archive for
  16  *  more details.
  17  */
  18
  19 #include <linux/aperture.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/delay.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/fb.h>
  29 #include <linux/init.h>
  30 #include <linux/pci.h>
  31 #include <asm/io.h>
  32 #include <linux/uaccess.h>
  33
  34 #if defined(CONFIG_PPC_PMAC)
  35 #include <linux/nvram.h>
  36 #include "macmodes.h"
  37 #endif
  38
  39 #ifndef __powerpc__
  40 #define eieio()         /* Enforce In-order Execution of I/O */
  41 #endif
  42
  43 /* TwinTurbo (Cosmo) registers */
  44 enum {
  45         S1SA    =  0, /* 0x00 */
  46         S2SA    =  1, /* 0x04 */
  47         SP      =  2, /* 0x08 */
  48         DSA     =  3, /* 0x0C */
  49         CNT     =  4, /* 0x10 */
  50         DP_OCTL =  5, /* 0x14 */
  51         CLR     =  6, /* 0x18 */
  52         BI      =  8, /* 0x20 */
  53         MBC     =  9, /* 0x24 */
  54         BLTCTL  = 10, /* 0x28 */
  55
  56         /* Scan Timing Generator Registers */
  57         HES     = 12, /* 0x30 */
  58         HEB     = 13, /* 0x34 */
  59         HSB     = 14, /* 0x38 */
  60         HT      = 15, /* 0x3C */
  61         VES     = 16, /* 0x40 */
  62         VEB     = 17, /* 0x44 */
  63         VSB     = 18, /* 0x48 */
  64         VT      = 19, /* 0x4C */
  65         HCIV    = 20, /* 0x50 */
  66         VCIV    = 21, /* 0x54 */
  67         TCDR    = 22, /* 0x58 */
  68         VIL     = 23, /* 0x5C */
  69         STGCTL  = 24, /* 0x60 */
  70
  71         /* Screen Refresh Generator Registers */
  72         SSR     = 25, /* 0x64 */
  73         HRIR    = 26, /* 0x68 */
  74         SPR     = 27, /* 0x6C */
  75         CMR     = 28, /* 0x70 */
  76         SRGCTL  = 29, /* 0x74 */
  77
  78         /* RAM Refresh Generator Registers */
  79         RRCIV   = 30, /* 0x78 */
  80         RRSC    = 31, /* 0x7C */
  81         RRCR    = 34, /* 0x88 */
  82
  83         /* System Registers */
  84         GIOE    = 32, /* 0x80 */
  85         GIO     = 33, /* 0x84 */
  86         SCR     = 35, /* 0x8C */
  87         SSTATUS = 36, /* 0x90 */
  88         PRC     = 37, /* 0x94 */
  89
  90 #if 0
  91         /* PCI Registers */
  92         DVID    = 0x00000000L,
  93         SC      = 0x00000004L,
  94         CCR     = 0x00000008L,
  95         OG      = 0x0000000CL,
  96         BARM    = 0x00000010L,
  97         BARER   = 0x00000030L,
  98 #endif
  99 };
 100
 101 /* IBM 624 RAMDAC Direct Registers */
 102 enum {
 103         PADDRW  = 0x00,
 104         PDATA   = 0x04,
 105         PPMASK  = 0x08,
 106         PADDRR  = 0x0c,
 107         PIDXLO  = 0x10,
 108         PIDXHI  = 0x14,
 109         PIDXDATA= 0x18,
 110         PIDXCTL = 0x1c
 111 };
 112
 113 /* IBM 624 RAMDAC Indirect Registers */
 114 enum {
 115         CLKCTL          = 0x02, /* (0x01) Miscellaneous Clock Control */
 116         SYNCCTL         = 0x03, /* (0x00) Sync Control */
 117         HSYNCPOS        = 0x04, /* (0x00) Horizontal Sync Position */
 118         PWRMNGMT        = 0x05, /* (0x00) Power Management */
 119         DACOP           = 0x06, /* (0x02) DAC Operation */
 120         PALETCTL        = 0x07, /* (0x00) Palette Control */
 121         SYSCLKCTL       = 0x08, /* (0x01) System Clock Control */
 122         PIXFMT          = 0x0a, /* () Pixel Format  [bpp >> 3 + 2] */
 123         BPP8            = 0x0b, /* () 8 Bits/Pixel Control */
 124         BPP16           = 0x0c, /* () 16 Bits/Pixel Control  [bit 1=1 for 565] */
 125         BPP24           = 0x0d, /* () 24 Bits/Pixel Control */
 126         BPP32           = 0x0e, /* () 32 Bits/Pixel Control */
 127         PIXCTL1         = 0x10, /* (0x05) Pixel PLL Control 1 */
 128         PIXCTL2         = 0x11, /* (0x00) Pixel PLL Control 2 */
 129         SYSCLKN         = 0x15, /* () System Clock N (System PLL Reference Divider) */
 130         SYSCLKM         = 0x16, /* () System Clock M (System PLL VCO Divider) */
 131         SYSCLKP         = 0x17, /* () System Clock P */
 132         SYSCLKC         = 0x18, /* () System Clock C */
 133         /*
 134          * Dot clock rate is 20MHz * (m + 1) / ((n + 1) * (p ? 2 * p : 1)
 135          * c is charge pump bias which depends on the VCO frequency
 136          */
 137         PIXM0           = 0x20, /* () Pixel M 0 */
 138         PIXN0           = 0x21, /* () Pixel N 0 */
 139         PIXP0           = 0x22, /* () Pixel P 0 */
 140         PIXC0           = 0x23, /* () Pixel C 0 */
 141         CURSCTL         = 0x30, /* (0x00) Cursor Control */
 142         CURSXLO         = 0x31, /* () Cursor X position, low 8 bits */
 143         CURSXHI         = 0x32, /* () Cursor X position, high 8 bits */
 144         CURSYLO         = 0x33, /* () Cursor Y position, low 8 bits */
 145         CURSYHI         = 0x34, /* () Cursor Y position, high 8 bits */
 146         CURSHOTX        = 0x35, /* () Cursor Hot Spot X */
 147         CURSHOTY        = 0x36, /* () Cursor Hot Spot Y */
 148         CURSACCTL       = 0x37, /* () Advanced Cursor Control Enable */
 149         CURSACATTR      = 0x38, /* () Advanced Cursor Attribute */
 150         CURS1R          = 0x40, /* () Cursor 1 Red */
 151         CURS1G          = 0x41, /* () Cursor 1 Green */
 152         CURS1B          = 0x42, /* () Cursor 1 Blue */
 153         CURS2R          = 0x43, /* () Cursor 2 Red */
 154         CURS2G          = 0x44, /* () Cursor 2 Green */
 155         CURS2B          = 0x45, /* () Cursor 2 Blue */
 156         CURS3R          = 0x46, /* () Cursor 3 Red */
 157         CURS3G          = 0x47, /* () Cursor 3 Green */
 158         CURS3B          = 0x48, /* () Cursor 3 Blue */
 159         BORDR           = 0x60, /* () Border Color Red */
 160         BORDG           = 0x61, /* () Border Color Green */
 161         BORDB           = 0x62, /* () Border Color Blue */
 162         MISCTL1         = 0x70, /* (0x00) Miscellaneous Control 1 */
 163         MISCTL2         = 0x71, /* (0x00) Miscellaneous Control 2 */
 164         MISCTL3         = 0x72, /* (0x00) Miscellaneous Control 3 */
 165         KEYCTL          = 0x78  /* (0x00) Key Control/DB Operation */
 166 };
 167
 168 /* TI TVP 3030 RAMDAC Direct Registers */
 169 enum {
 170         TVPADDRW = 0x00,        /* 0  Palette/Cursor RAM Write Address/Index */
 171         TVPPDATA = 0x04,        /* 1  Palette Data RAM Data */
 172         TVPPMASK = 0x08,        /* 2  Pixel Read-Mask */
 173         TVPPADRR = 0x0c,        /* 3  Palette/Cursor RAM Read Address */
 174         TVPCADRW = 0x10,        /* 4  Cursor/Overscan Color Write Address */
 175         TVPCDATA = 0x14,        /* 5  Cursor/Overscan Color Data */
 176                                 /* 6  reserved */
 177         TVPCADRR = 0x1c,        /* 7  Cursor/Overscan Color Read Address */
 178                                 /* 8  reserved */
 179         TVPDCCTL = 0x24,        /* 9  Direct Cursor Control */
 180         TVPIDATA = 0x28,        /* 10 Index Data */
 181         TVPCRDAT = 0x2c,        /* 11 Cursor RAM Data */
 182         TVPCXPOL = 0x30,        /* 12 Cursor-Position X LSB */
 183         TVPCXPOH = 0x34,        /* 13 Cursor-Position X MSB */
 184         TVPCYPOL = 0x38,        /* 14 Cursor-Position Y LSB */
 185         TVPCYPOH = 0x3c,        /* 15 Cursor-Position Y MSB */
 186 };
 187
 188 /* TI TVP 3030 RAMDAC Indirect Registers */
 189 enum {
 190         TVPIRREV = 0x01,        /* Silicon Revision [RO] */
 191         TVPIRICC = 0x06,        /* Indirect Cursor Control      (0x00) */
 192         TVPIRBRC = 0x07,        /* Byte Router Control  (0xe4) */
 193         TVPIRLAC = 0x0f,        /* Latch Control                (0x06) */
 194         TVPIRTCC = 0x18,        /* True Color Control   (0x80) */
 195         TVPIRMXC = 0x19,        /* Multiplex Control            (0x98) */
 196         TVPIRCLS = 0x1a,        /* Clock Selection              (0x07) */
 197         TVPIRPPG = 0x1c,        /* Palette Page         (0x00) */
 198         TVPIRGEC = 0x1d,        /* General Control              (0x00) */
 199         TVPIRMIC = 0x1e,        /* Miscellaneous Control        (0x00) */
 200         TVPIRPLA = 0x2c,        /* PLL Address */
 201         TVPIRPPD = 0x2d,        /* Pixel Clock PLL Data */
 202         TVPIRMPD = 0x2e,        /* Memory Clock PLL Data */
 203         TVPIRLPD = 0x2f,        /* Loop Clock PLL Data */
 204         TVPIRCKL = 0x30,        /* Color-Key Overlay Low */
 205         TVPIRCKH = 0x31,        /* Color-Key Overlay High */
 206         TVPIRCRL = 0x32,        /* Color-Key Red Low */
 207         TVPIRCRH = 0x33,        /* Color-Key Red High */
 208         TVPIRCGL = 0x34,        /* Color-Key Green Low */
 209         TVPIRCGH = 0x35,        /* Color-Key Green High */
 210         TVPIRCBL = 0x36,        /* Color-Key Blue Low */
 211         TVPIRCBH = 0x37,        /* Color-Key Blue High */
 212         TVPIRCKC = 0x38,        /* Color-Key Control            (0x00) */
 213         TVPIRMLC = 0x39,        /* MCLK/Loop Clock Control      (0x18) */
 214         TVPIRSEN = 0x3a,        /* Sense Test                   (0x00) */
 215         TVPIRTMD = 0x3b,        /* Test Mode Data */
 216         TVPIRRML = 0x3c,        /* CRC Remainder LSB [RO] */
 217         TVPIRRMM = 0x3d,        /* CRC Remainder MSB [RO] */
 218         TVPIRRMS = 0x3e,        /* CRC  Bit Select [WO] */
 219         TVPIRDID = 0x3f,        /* Device ID [RO]               (0x30) */
 220         TVPIRRES = 0xff         /* Software Reset [WO] */
 221 };
 222
 223 struct initvalues {
 224         __u8 addr, value;
 225 };
 226
 227 static struct initvalues ibm_initregs[] = {
 228         { CLKCTL,       0x21 },
 229         { SYNCCTL,      0x00 },
 230         { HSYNCPOS,     0x00 },
 231         { PWRMNGMT,     0x00 },
 232         { DACOP,        0x02 },
 233         { PALETCTL,     0x00 },
 234         { SYSCLKCTL,    0x01 },
 235
 236         /*
 237          * Note that colors in X are correct only if all video data is
 238          * passed through the palette in the DAC.  That is, "indirect
 239          * color" must be configured.  This is the case for the IBM DAC
 240          * used in the 2MB and 4MB cards, at least.
 241          */
 242         { BPP8,         0x00 },
 243         { BPP16,        0x01 },
 244         { BPP24,        0x00 },
 245         { BPP32,        0x00 },
 246
 247         { PIXCTL1,      0x05 },
 248         { PIXCTL2,      0x00 },
 249         { SYSCLKN,      0x08 },
 250         { SYSCLKM,      0x4f },
 251         { SYSCLKP,      0x00 },
 252         { SYSCLKC,      0x00 },
 253         { CURSCTL,      0x00 },
 254         { CURSACCTL,    0x01 },
 255         { CURSACATTR,   0xa8 },
 256         { CURS1R,       0xff },
 257         { CURS1G,       0xff },
 258         { CURS1B,       0xff },
 259         { CURS2R,       0xff },
 260         { CURS2G,       0xff },
 261         { CURS2B,       0xff },
 262         { CURS3R,       0xff },
 263         { CURS3G,       0xff },
 264         { CURS3B,       0xff },
 265         { BORDR,        0xff },
 266         { BORDG,        0xff },
 267         { BORDB,        0xff },
 268         { MISCTL1,      0x01 },
 269         { MISCTL2,      0x45 },
 270         { MISCTL3,      0x00 },
 271         { KEYCTL,       0x00 }
 272 };
 273
 274 static struct initvalues tvp_initregs[] = {
 275         { TVPIRICC,     0x00 },
 276         { TVPIRBRC,     0xe4 },
 277         { TVPIRLAC,     0x06 },
 278         { TVPIRTCC,     0x80 },
 279         { TVPIRMXC,     0x4d },
 280         { TVPIRCLS,     0x05 },
 281         { TVPIRPPG,     0x00 },
 282         { TVPIRGEC,     0x00 },
 283         { TVPIRMIC,     0x08 },
 284         { TVPIRCKL,     0xff },
 285         { TVPIRCKH,     0xff },
 286         { TVPIRCRL,     0xff },
 287         { TVPIRCRH,     0xff },
 288         { TVPIRCGL,     0xff },
 289         { TVPIRCGH,     0xff },
 290         { TVPIRCBL,     0xff },
 291         { TVPIRCBH,     0xff },
 292         { TVPIRCKC,     0x00 },
 293         { TVPIRPLA,     0x00 },
 294         { TVPIRPPD,     0xc0 },
 295         { TVPIRPPD,     0xd5 },
 296         { TVPIRPPD,     0xea },
 297         { TVPIRPLA,     0x00 },
 298         { TVPIRMPD,     0xb9 },
 299         { TVPIRMPD,     0x3a },
 300         { TVPIRMPD,     0xb1 },
 301         { TVPIRPLA,     0x00 },
 302         { TVPIRLPD,     0xc1 },
 303         { TVPIRLPD,     0x3d },
 304         { TVPIRLPD,     0xf3 },
 305 };
 306
 307 struct imstt_regvals {
 308         __u32 pitch;
 309         __u16 hes, heb, hsb, ht, ves, veb, vsb, vt, vil;
 310         __u8 pclk_m, pclk_n, pclk_p;
 311         /* Values of the tvp which change depending on colormode x resolution */
 312         __u8 mlc[3];    /* Memory Loop Config 0x39 */
 313         __u8 lckl_p[3]; /* P value of LCKL PLL */
 314 };
 315
 316 struct imstt_par {
 317         struct imstt_regvals init;
 318         __u32 __iomem *dc_regs;
 319         unsigned long cmap_regs_phys;
 320         __u8 *cmap_regs;
 321         __u32 ramdac;
 322         __u32 palette[16];
 323 };
 324
 325 enum {
 326         IBM = 0,
 327         TVP = 1
 328 };
 329
 330 #define INIT_BPP                8
 331 #define INIT_XRES               640
 332 #define INIT_YRES               480
 333
 334 static int inverse = 0;
 335 static char fontname[40] __initdata = { 0 };
 336 #if defined(CONFIG_PPC_PMAC)
 337 static signed char init_vmode = -1, init_cmode = -1;
 338 #endif
 339
 340 static struct imstt_regvals tvp_reg_init_2 = {
 341         512,
 342         0x0002, 0x0006, 0x0026, 0x0028, 0x0003, 0x0016, 0x0196, 0x0197, 0x0196,
 343         0xec, 0x2a, 0xf3,
 344         { 0x3c, 0x3b, 0x39 }, { 0xf3, 0xf3, 0xf3 }
 345 };
 346
 347 static struct imstt_regvals tvp_reg_init_6 = {
 348         640,
 349         0x0004, 0x0009, 0x0031, 0x0036, 0x0003, 0x002a, 0x020a, 0x020d, 0x020a,
 350         0xef, 0x2e, 0xb2,
 351         { 0x39, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 352 };
 353
 354 static struct imstt_regvals tvp_reg_init_12 = {
 355         800,
 356         0x0005, 0x000e, 0x0040, 0x0042, 0x0003, 0x018, 0x270, 0x271, 0x270,
 357         0xf6, 0x2e, 0xf2,
 358         { 0x3a, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 359 };
 360
 361 static struct imstt_regvals tvp_reg_init_13 = {
 362         832,
 363         0x0004, 0x0011, 0x0045, 0x0048, 0x0003, 0x002a, 0x029a, 0x029b, 0x0000,
 364         0xfe, 0x3e, 0xf1,
 365         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 366 };
 367
 368 static struct imstt_regvals tvp_reg_init_17 = {
 369         1024,
 370         0x0006, 0x0210, 0x0250, 0x0053, 0x1003, 0x0021, 0x0321, 0x0324, 0x0000,
 371         0xfc, 0x3a, 0xf1,
 372         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 373 };
 374
 375 static struct imstt_regvals tvp_reg_init_18 = {
 376         1152,
 377         0x0009, 0x0011, 0x059, 0x5b, 0x0003, 0x0031, 0x0397, 0x039a, 0x0000,
 378         0xfd, 0x3a, 0xf1,
 379         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 380 };
 381
 382 static struct imstt_regvals tvp_reg_init_19 = {
 383         1280,
 384         0x0009, 0x0016, 0x0066, 0x0069, 0x0003, 0x0027, 0x03e7, 0x03e8, 0x03e7,
 385         0xf7, 0x36, 0xf0,
 386         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 387 };
 388
 389 static struct imstt_regvals tvp_reg_init_20 = {
 390         1280,
 391         0x0009, 0x0018, 0x0068, 0x006a, 0x0003, 0x0029, 0x0429, 0x042a, 0x0000,
 392         0xf0, 0x2d, 0xf0,
 393         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 394 };
 395
 396 /*
 397  * PCI driver prototypes
 398  */
 399 static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 400 static void imsttfb_remove(struct pci_dev *pdev);
 401
 402 /*
 403  * Register access
 404  */
 405 static inline u32 read_reg_le32(volatile u32 __iomem *base, int regindex)
 406 {
 407 #ifdef __powerpc__
 408         return in_le32(base + regindex);
 409 #else
 410         return readl(base + regindex);
 411 #endif
 412 }
 413
 414 static inline void write_reg_le32(volatile u32 __iomem *base, int regindex, u32 val)
 415 {
 416 #ifdef __powerpc__
 417         out_le32(base + regindex, val);
 418 #else
 419         writel(val, base + regindex);
 420 #endif
 421 }
 422
 423 static __u32
 424 getclkMHz(struct imstt_par *par)
 425 {
 426         __u32 clk_m, clk_n, clk_p;
 427
 428         clk_m = par->init.pclk_m;
 429         clk_n = par->init.pclk_n;
 430         clk_p = par->init.pclk_p;
 431
 432         return 20 * (clk_m + 1) / ((clk_n + 1) * (clk_p ? 2 * clk_p : 1));
 433 }
 434
 435 static void
 436 setclkMHz(struct imstt_par *par, __u32 MHz)
 437 {
 438         __u32 clk_m, clk_n, x, stage, spilled;
 439
 440         clk_m = clk_n = 0;
 441         stage = spilled = 0;
 442         for (;;) {
 443                 switch (stage) {
 444                         case 0:
 445                                 clk_m++;
 446                                 break;
 447                         case 1:
 448                                 clk_n++;
 449                                 break;
 450                 }
 451                 x = 20 * (clk_m + 1) / (clk_n + 1);
 452                 if (x == MHz)
 453                         break;
 454                 if (x > MHz) {
 455                         spilled = 1;
 456                         stage = 1;
 457                 } else if (spilled && x < MHz) {
 458                         stage = 0;
 459                 }
 460         }
 461
 462         par->init.pclk_m = clk_m;
 463         par->init.pclk_n = clk_n;
 464         par->init.pclk_p = 0;
 465 }
 466
 467 static struct imstt_regvals *
 468 compute_imstt_regvals_ibm(struct imstt_par *par, int xres, int yres)
 469 {
 470         struct imstt_regvals *init = &par->init;
 471         __u32 MHz, hes, heb, veb, htp, vtp;
 472
 473         switch (xres) {
 474                 case 640:
 475                         hes = 0x0008; heb = 0x0012; veb = 0x002a; htp = 10; vtp = 2;
 476                         MHz = 30 /* .25 */ ;
 477                         break;
 478                 case 832:
 479                         hes = 0x0005; heb = 0x0020; veb = 0x0028; htp = 8; vtp = 3;
 480                         MHz = 57 /* .27_ */ ;
 481                         break;
 482                 case 1024:
 483                         hes = 0x000a; heb = 0x001c; veb = 0x0020; htp = 8; vtp = 3;
 484                         MHz = 80;
 485                         break;
 486                 case 1152:
 487                         hes = 0x0012; heb = 0x0022; veb = 0x0031; htp = 4; vtp = 3;
 488                         MHz = 101 /* .6_ */ ;
 489                         break;
 490                 case 1280:
 491                         hes = 0x0012; heb = 0x002f; veb = 0x0029; htp = 4; vtp = 1;
 492                         MHz = yres == 960 ? 126 : 135;
 493                         break;
 494                 case 1600:
 495                         hes = 0x0018; heb = 0x0040; veb = 0x002a; htp = 4; vtp = 3;
 496                         MHz = 200;
 497                         break;
 498                 default:
 499                         return NULL;
 500         }
 501
 502         setclkMHz(par, MHz);
 503
 504         init->hes = hes;
 505         init->heb = heb;
 506         init->hsb = init->heb + (xres >> 3);
 507         init->ht = init->hsb + htp;
 508         init->ves = 0x0003;
 509         init->veb = veb;
 510         init->vsb = init->veb + yres;
 511         init->vt = init->vsb + vtp;
 512         init->vil = init->vsb;
 513
 514         init->pitch = xres;
 515         return init;
 516 }
 517
 518 static struct imstt_regvals *
 519 compute_imstt_regvals_tvp(struct imstt_par *par, int xres, int yres)
 520 {
 521         struct imstt_regvals *init;
 522
 523         switch (xres) {
 524                 case 512:
 525                         init = &tvp_reg_init_2;
 526                         break;
 527                 case 640:
 528                         init = &tvp_reg_init_6;
 529                         break;
 530                 case 800:
 531                         init = &tvp_reg_init_12;
 532                         break;
 533                 case 832:
 534                         init = &tvp_reg_init_13;
 535                         break;
 536                 case 1024:
 537                         init = &tvp_reg_init_17;
 538                         break;
 539                 case 1152:
 540                         init = &tvp_reg_init_18;
 541                         break;
 542                 case 1280:
 543                         init = yres == 960 ? &tvp_reg_init_19 : &tvp_reg_init_20;
 544                         break;
 545                 default:
 546                         return NULL;
 547         }
 548         par->init = *init;
 549         return init;
 550 }
 551
 552 static struct imstt_regvals *
 553 compute_imstt_regvals (struct imstt_par *par, u_int xres, u_int yres)
 554 {
 555         if (par->ramdac == IBM)
 556                 return compute_imstt_regvals_ibm(par, xres, yres);
 557         else
 558                 return compute_imstt_regvals_tvp(par, xres, yres);
 559 }
 560
 561 static void
 562 set_imstt_regvals_ibm (struct imstt_par *par, u_int bpp)
 563 {
 564         struct imstt_regvals *init = &par->init;
 565         __u8 pformat = (bpp >> 3) + 2;
 566
 567         par->cmap_regs[PIDXHI] = 0;             eieio();
 568         par->cmap_regs[PIDXLO] = PIXM0;         eieio();
 569         par->cmap_regs[PIDXDATA] = init->pclk_m;eieio();
 570         par->cmap_regs[PIDXLO] = PIXN0;         eieio();
 571         par->cmap_regs[PIDXDATA] = init->pclk_n;eieio();
 572         par->cmap_regs[PIDXLO] = PIXP0;         eieio();
 573         par->cmap_regs[PIDXDATA] = init->pclk_p;eieio();
 574         par->cmap_regs[PIDXLO] = PIXC0;         eieio();
 575         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
 576
 577         par->cmap_regs[PIDXLO] = PIXFMT;        eieio();
 578         par->cmap_regs[PIDXDATA] = pformat;     eieio();
 579 }
 580
 581 static void
 582 set_imstt_regvals_tvp (struct imstt_par *par, u_int bpp)
 583 {
 584         struct imstt_regvals *init = &par->init;
 585         __u8 tcc, mxc, lckl_n, mic;
 586         __u8 mlc, lckl_p;
 587
 588         switch (bpp) {
 589                 default:
 590                 case 8:
 591                         tcc = 0x80;
 592                         mxc = 0x4d;
 593                         lckl_n = 0xc1;
 594                         mlc = init->mlc[0];
 595                         lckl_p = init->lckl_p[0];
 596                         break;
 597                 case 16:
 598                         tcc = 0x44;
 599                         mxc = 0x55;
 600                         lckl_n = 0xe1;
 601                         mlc = init->mlc[1];
 602                         lckl_p = init->lckl_p[1];
 603                         break;
 604                 case 24:
 605                         tcc = 0x5e;
 606                         mxc = 0x5d;
 607                         lckl_n = 0xf1;
 608                         mlc = init->mlc[2];
 609                         lckl_p = init->lckl_p[2];
 610                         break;
 611                 case 32:
 612                         tcc = 0x46;
 613                         mxc = 0x5d;
 614                         lckl_n = 0xf1;
 615                         mlc = init->mlc[2];
 616                         lckl_p = init->lckl_p[2];
 617                         break;
 618         }
 619         mic = 0x08;
 620
 621         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 622         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 623         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 624         par->cmap_regs[TVPIDATA] = init->pclk_m;        eieio();
 625         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 626         par->cmap_regs[TVPIDATA] = init->pclk_n;        eieio();
 627         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 628         par->cmap_regs[TVPIDATA] = init->pclk_p;        eieio();
 629
 630         par->cmap_regs[TVPADDRW] = TVPIRTCC;            eieio();
 631         par->cmap_regs[TVPIDATA] = tcc;                 eieio();
 632         par->cmap_regs[TVPADDRW] = TVPIRMXC;            eieio();
 633         par->cmap_regs[TVPIDATA] = mxc;                 eieio();
 634         par->cmap_regs[TVPADDRW] = TVPIRMIC;            eieio();
 635         par->cmap_regs[TVPIDATA] = mic;                 eieio();
 636
 637         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 638         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 639         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 640         par->cmap_regs[TVPIDATA] = lckl_n;              eieio();
 641
 642         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 643         par->cmap_regs[TVPIDATA] = 0x15;                eieio();
 644         par->cmap_regs[TVPADDRW] = TVPIRMLC;            eieio();
 645         par->cmap_regs[TVPIDATA] = mlc;                 eieio();
 646
 647         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 648         par->cmap_regs[TVPIDATA] = 0x2a;                eieio();
 649         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 650         par->cmap_regs[TVPIDATA] = lckl_p;              eieio();
 651 }
 652
 653 static void
 654 set_imstt_regvals (struct fb_info *info, u_int bpp)
 655 {
 656         struct imstt_par *par = info->par;
 657         struct imstt_regvals *init = &par->init;
 658         __u32 ctl, pitch, byteswap, scr;
 659
 660         if (par->ramdac == IBM)
 661                 set_imstt_regvals_ibm(par, bpp);
 662         else
 663                 set_imstt_regvals_tvp(par, bpp);
 664
 665   /*
 666    * From what I (jsk) can gather poking around with MacsBug,
 667    * bits 8 and 9 in the SCR register control endianness
 668    * correction (byte swapping).  These bits must be set according
 669    * to the color depth as follows:
 670    *     Color depth    Bit 9   Bit 8
 671    *     ==========     =====   =====
 672    *        8bpp          0       0
 673    *       16bpp          0       1
 674    *       32bpp          1       1
 675    */
 676         switch (bpp) {
 677                 default:
 678                 case 8:
 679                         ctl = 0x17b1;
 680                         pitch = init->pitch >> 2;
 681                         byteswap = 0x000;
 682                         break;
 683                 case 16:
 684                         ctl = 0x17b3;
 685                         pitch = init->pitch >> 1;
 686                         byteswap = 0x100;
 687                         break;
 688                 case 24:
 689                         ctl = 0x17b9;
 690                         pitch = init->pitch - (init->pitch >> 2);
 691                         byteswap = 0x200;
 692                         break;
 693                 case 32:
 694                         ctl = 0x17b5;
 695                         pitch = init->pitch;
 696                         byteswap = 0x300;
 697                         break;
 698         }
 699         if (par->ramdac == TVP)
 700                 ctl -= 0x30;
 701
 702         write_reg_le32(par->dc_regs, HES, init->hes);
 703         write_reg_le32(par->dc_regs, HEB, init->heb);
 704         write_reg_le32(par->dc_regs, HSB, init->hsb);
 705         write_reg_le32(par->dc_regs, HT, init->ht);
 706         write_reg_le32(par->dc_regs, VES, init->ves);
 707         write_reg_le32(par->dc_regs, VEB, init->veb);
 708         write_reg_le32(par->dc_regs, VSB, init->vsb);
 709         write_reg_le32(par->dc_regs, VT, init->vt);
 710         write_reg_le32(par->dc_regs, VIL, init->vil);
 711         write_reg_le32(par->dc_regs, HCIV, 1);
 712         write_reg_le32(par->dc_regs, VCIV, 1);
 713         write_reg_le32(par->dc_regs, TCDR, 4);
 714         write_reg_le32(par->dc_regs, RRCIV, 1);
 715         write_reg_le32(par->dc_regs, RRSC, 0x980);
 716         write_reg_le32(par->dc_regs, RRCR, 0x11);
 717
 718         if (par->ramdac == IBM) {
 719                 write_reg_le32(par->dc_regs, HRIR, 0x0100);
 720                 write_reg_le32(par->dc_regs, CMR, 0x00ff);
 721                 write_reg_le32(par->dc_regs, SRGCTL, 0x0073);
 722         } else {
 723                 write_reg_le32(par->dc_regs, HRIR, 0x0200);
 724                 write_reg_le32(par->dc_regs, CMR, 0x01ff);
 725                 write_reg_le32(par->dc_regs, SRGCTL, 0x0003);
 726         }
 727
 728         switch (info->fix.smem_len) {
 729                 case 0x200000:
 730                         scr = 0x059d | byteswap;
 731                         break;
 732                 /* case 0x400000:
 733                    case 0x800000: */
 734                 default:
 735                         pitch >>= 1;
 736                         scr = 0x150dd | byteswap;
 737                         break;
 738         }
 739
 740         write_reg_le32(par->dc_regs, SCR, scr);
 741         write_reg_le32(par->dc_regs, SPR, pitch);
 742         write_reg_le32(par->dc_regs, STGCTL, ctl);
 743 }
 744
 745 static inline void
 746 set_offset (struct fb_var_screeninfo *var, struct fb_info *info)
 747 {
 748         struct imstt_par *par = info->par;
 749         __u32 off = var->yoffset * (info->fix.line_length >> 3)
 750                     + ((var->xoffset * (info->var.bits_per_pixel >> 3)) >> 3);
 751         write_reg_le32(par->dc_regs, SSR, off);
 752 }
 753
 754 static inline void
 755 set_555 (struct imstt_par *par)
 756 {
 757         if (par->ramdac == IBM) {
 758                 par->cmap_regs[PIDXHI] = 0;             eieio();
 759                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 760                 par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 761         } else {
 762                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 763                 par->cmap_regs[TVPIDATA] = 0x44;        eieio();
 764         }
 765 }
 766
 767 static inline void
 768 set_565 (struct imstt_par *par)
 769 {
 770         if (par->ramdac == IBM) {
 771                 par->cmap_regs[PIDXHI] = 0;             eieio();
 772                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 773                 par->cmap_regs[PIDXDATA] = 0x03;        eieio();
 774         } else {
 775                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 776                 par->cmap_regs[TVPIDATA] = 0x45;        eieio();
 777         }
 778 }
 779
 780 static int
 781 imsttfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 782 {
 783         if ((var->bits_per_pixel != 8 && var->bits_per_pixel != 16
 784             && var->bits_per_pixel != 24 && var->bits_per_pixel != 32)
 785             || var->xres_virtual < var->xres || var->yres_virtual < var->yres
 786             || var->nonstd
 787             || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
 788                 return -EINVAL;
 789
 790         if ((var->xres * var->yres) * (var->bits_per_pixel >> 3) > info->fix.smem_len
 791             || (var->xres_virtual * var->yres_virtual) * (var->bits_per_pixel >> 3) > info->fix.smem_len)
 792                 return -EINVAL;
 793
 794         switch (var->bits_per_pixel) {
 795                 case 8:
 796                         var->red.offset = 0;
 797                         var->red.length = 8;
 798                         var->green.offset = 0;
 799                         var->green.length = 8;
 800                         var->blue.offset = 0;
 801                         var->blue.length = 8;
 802                         var->transp.offset = 0;
 803                         var->transp.length = 0;
 804                         break;
 805                 case 16:        /* RGB 555 or 565 */
 806                         if (var->green.length != 6)
 807                                 var->red.offset = 10;
 808                         var->red.length = 5;
 809                         var->green.offset = 5;
 810                         if (var->green.length != 6)
 811                                 var->green.length = 5;
 812                         var->blue.offset = 0;
 813                         var->blue.length = 5;
 814                         var->transp.offset = 0;
 815                         var->transp.length = 0;
 816                         break;
 817                 case 24:        /* RGB 888 */
 818                         var->red.offset = 16;
 819                         var->red.length = 8;
 820                         var->green.offset = 8;
 821                         var->green.length = 8;
 822                         var->blue.offset = 0;
 823                         var->blue.length = 8;
 824                         var->transp.offset = 0;
 825                         var->transp.length = 0;
 826                         break;
 827                 case 32:        /* RGBA 8888 */
 828                         var->red.offset = 16;
 829                         var->red.length = 8;
 830                         var->green.offset = 8;
 831                         var->green.length = 8;
 832                         var->blue.offset = 0;
 833                         var->blue.length = 8;
 834                         var->transp.offset = 24;
 835                         var->transp.length = 8;
 836                         break;
 837         }
 838
 839         if (var->yres == var->yres_virtual) {
 840                 __u32 vram = (info->fix.smem_len - (PAGE_SIZE << 2));
 841                 var->yres_virtual = ((vram << 3) / var->bits_per_pixel) / var->xres_virtual;
 842                 if (var->yres_virtual < var->yres)
 843                         var->yres_virtual = var->yres;
 844         }
 845
 846         var->red.msb_right = 0;
 847         var->green.msb_right = 0;
 848         var->blue.msb_right = 0;
 849         var->transp.msb_right = 0;
 850         var->height = -1;
 851         var->width = -1;
 852         var->vmode = FB_VMODE_NONINTERLACED;
 853         var->left_margin = var->right_margin = 16;
 854         var->upper_margin = var->lower_margin = 16;
 855         var->hsync_len = var->vsync_len = 8;
 856         return 0;
 857 }
 858
 859 static int
 860 imsttfb_set_par(struct fb_info *info)
 861 {
 862         struct imstt_par *par = info->par;
 863
 864         if (!compute_imstt_regvals(par, info->var.xres, info->var.yres))
 865                 return -EINVAL;
 866
 867         if (info->var.green.length == 6)
 868                 set_565(par);
 869         else
 870                 set_555(par);
 871         set_imstt_regvals(info, info->var.bits_per_pixel);
 872         info->var.pixclock = 1000000 / getclkMHz(par);
 873         return 0;
 874 }
 875
 876 static int
 877 imsttfb_setcolreg (u_int regno, u_int red, u_int green, u_int blue,
 878                    u_int transp, struct fb_info *info)
 879 {
 880         struct imstt_par *par = info->par;
 881         u_int bpp = info->var.bits_per_pixel;
 882
 883         if (regno > 255)
 884                 return 1;
 885
 886         red >>= 8;
 887         green >>= 8;
 888         blue >>= 8;
 889
 890         /* PADDRW/PDATA are the same as TVPPADDRW/TVPPDATA */
 891         if (0 && bpp == 16)     /* screws up X */
 892                 par->cmap_regs[PADDRW] = regno << 3;
 893         else
 894                 par->cmap_regs[PADDRW] = regno;
 895         eieio();
 896
 897         par->cmap_regs[PDATA] = red;    eieio();
 898         par->cmap_regs[PDATA] = green;  eieio();
 899         par->cmap_regs[PDATA] = blue;   eieio();
 900
 901         if (regno < 16)
 902                 switch (bpp) {
 903                         case 16:
 904                                 par->palette[regno] =
 905                                         (regno << (info->var.green.length ==
 906                                         5 ? 10 : 11)) | (regno << 5) | regno;
 907                                 break;
 908                         case 24:
 909                                 par->palette[regno] =
 910                                         (regno << 16) | (regno << 8) | regno;
 911                                 break;
 912                         case 32: {
 913                                 int i = (regno << 8) | regno;
 914                                 par->palette[regno] = (i << 16) |i;
 915                                 break;
 916                         }
 917                 }
 918         return 0;
 919 }
 920
 921 static int
 922 imsttfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 923 {
 924         if (var->xoffset + info->var.xres > info->var.xres_virtual
 925             || var->yoffset + info->var.yres > info->var.yres_virtual)
 926                 return -EINVAL;
 927
 928         info->var.xoffset = var->xoffset;
 929         info->var.yoffset = var->yoffset;
 930         set_offset(var, info);
 931         return 0;
 932 }
 933
 934 static int
 935 imsttfb_blank(int blank, struct fb_info *info)
 936 {
 937         struct imstt_par *par = info->par;
 938         __u32 ctrl;
 939
 940         ctrl = read_reg_le32(par->dc_regs, STGCTL);
 941         if (blank > 0) {
 942                 switch (blank) {
 943                 case FB_BLANK_NORMAL:
 944                 case FB_BLANK_POWERDOWN:
 945                         ctrl &= ~0x00000380;
 946                         if (par->ramdac == IBM) {
 947                                 par->cmap_regs[PIDXHI] = 0;             eieio();
 948                                 par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 949                                 par->cmap_regs[PIDXDATA] = 0x55;        eieio();
 950                                 par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 951                                 par->cmap_regs[PIDXDATA] = 0x11;        eieio();
 952                                 par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 953                                 par->cmap_regs[PIDXDATA] = 0x0f;        eieio();
 954                                 par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 955                                 par->cmap_regs[PIDXDATA] = 0x1f;        eieio();
 956                                 par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 957                                 par->cmap_regs[PIDXDATA] = 0xc0;
 958                         }
 959                         break;
 960                 case FB_BLANK_VSYNC_SUSPEND:
 961                         ctrl &= ~0x00000020;
 962                         break;
 963                 case FB_BLANK_HSYNC_SUSPEND:
 964                         ctrl &= ~0x00000010;
 965                         break;
 966                 }
 967         } else {
 968                 if (par->ramdac == IBM) {
 969                         ctrl |= 0x000017b0;
 970                         par->cmap_regs[PIDXHI] = 0;             eieio();
 971                         par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 972                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 973                         par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 974                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 975                         par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 976                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 977                         par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 978                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 979                         par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 980                         par->cmap_regs[PIDXDATA] = 0x45;        eieio();
 981                 } else
 982                         ctrl |= 0x00001780;
 983         }
 984         write_reg_le32(par->dc_regs, STGCTL, ctrl);
 985         return 0;
 986 }
 987
 988 static void
 989 imsttfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 990 {
 991         struct imstt_par *par = info->par;
 992         __u32 Bpp, line_pitch, bgc, dx, dy, width, height;
 993
 994         bgc = rect->color;
 995         bgc |= (bgc << 8);
 996         bgc |= (bgc << 16);
 997
 998         Bpp = info->var.bits_per_pixel >> 3,
 999         line_pitch = info->fix.line_length;
1000
1001         dy = rect->dy * line_pitch;
1002         dx = rect->dx * Bpp;
1003         height = rect->height;
1004         height--;
1005         width = rect->width * Bpp;
1006         width--;
1007
1008         if (rect->rop == ROP_COPY) {
1009                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1010                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1011                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1012                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1013                 write_reg_le32(par->dc_regs, BI, 0xffffffff);
1014                 write_reg_le32(par->dc_regs, MBC, 0xffffffff);
1015                 write_reg_le32(par->dc_regs, CLR, bgc);
1016                 write_reg_le32(par->dc_regs, BLTCTL, 0x840); /* 0x200000 */
1017                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1018                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1019         } else {
1020                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1021                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1022                 write_reg_le32(par->dc_regs, S1SA, dy + dx);
1023                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1024                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1025                 write_reg_le32(par->dc_regs, SP, line_pitch);
1026                 write_reg_le32(par->dc_regs, BLTCTL, 0x40005);
1027                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1028                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1029         }
1030 }
1031
1032 static void
1033 imsttfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1034 {
1035         struct imstt_par *par = info->par;
1036         __u32 Bpp, line_pitch, fb_offset_old, fb_offset_new, sp, dp_octl;
1037         __u32 cnt, bltctl, sx, sy, dx, dy, height, width;
1038
1039         Bpp = info->var.bits_per_pixel >> 3,
1040
1041         sx = area->sx * Bpp;
1042         sy = area->sy;
1043         dx = area->dx * Bpp;
1044         dy = area->dy;
1045         height = area->height;
1046         height--;
1047         width = area->width * Bpp;
1048         width--;
1049
1050         line_pitch = info->fix.line_length;
1051         bltctl = 0x05;
1052         sp = line_pitch << 16;
1053         cnt = height << 16;
1054
1055         if (sy < dy) {
1056                 sy += height;
1057                 dy += height;
1058                 sp |= -(line_pitch) & 0xffff;
1059                 dp_octl = -(line_pitch) & 0xffff;
1060         } else {
1061                 sp |= line_pitch;
1062                 dp_octl = line_pitch;
1063         }
1064         if (sx < dx) {
1065                 sx += width;
1066                 dx += width;
1067                 bltctl |= 0x80;
1068                 cnt |= -(width) & 0xffff;
1069         } else {
1070                 cnt |= width;
1071         }
1072         fb_offset_old = sy * line_pitch + sx;
1073         fb_offset_new = dy * line_pitch + dx;
1074
1075         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1076         write_reg_le32(par->dc_regs, S1SA, fb_offset_old);
1077         write_reg_le32(par->dc_regs, SP, sp);
1078         write_reg_le32(par->dc_regs, DSA, fb_offset_new);
1079         write_reg_le32(par->dc_regs, CNT, cnt);
1080         write_reg_le32(par->dc_regs, DP_OCTL, dp_octl);
1081         write_reg_le32(par->dc_regs, BLTCTL, bltctl);
1082         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1083         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1084 }
1085
1086 #if 0
1087 static int
1088 imsttfb_load_cursor_image(struct imstt_par *par, int width, int height, __u8 fgc)
1089 {
1090         u_int x, y;
1091
1092         if (width > 32 || height > 32)
1093                 return -EINVAL;
1094
1095         if (par->ramdac == IBM) {
1096                 par->cmap_regs[PIDXHI] = 1;     eieio();
1097                 for (x = 0; x < 0x100; x++) {
1098                         par->cmap_regs[PIDXLO] = x;             eieio();
1099                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1100                 }
1101                 par->cmap_regs[PIDXHI] = 1;     eieio();
1102                 for (y = 0; y < height; y++)
1103                         for (x = 0; x < width >> 2; x++) {
1104                                 par->cmap_regs[PIDXLO] = x + y * 8;     eieio();
1105                                 par->cmap_regs[PIDXDATA] = 0xff;        eieio();
1106                         }
1107                 par->cmap_regs[PIDXHI] = 0;             eieio();
1108                 par->cmap_regs[PIDXLO] = CURS1R;        eieio();
1109                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1110                 par->cmap_regs[PIDXLO] = CURS1G;        eieio();
1111                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1112                 par->cmap_regs[PIDXLO] = CURS1B;        eieio();
1113                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1114                 par->cmap_regs[PIDXLO] = CURS2R;        eieio();
1115                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1116                 par->cmap_regs[PIDXLO] = CURS2G;        eieio();
1117                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1118                 par->cmap_regs[PIDXLO] = CURS2B;        eieio();
1119                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1120                 par->cmap_regs[PIDXLO] = CURS3R;        eieio();
1121                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1122                 par->cmap_regs[PIDXLO] = CURS3G;        eieio();
1123                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1124                 par->cmap_regs[PIDXLO] = CURS3B;        eieio();
1125                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1126         } else {
1127                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1128                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1129                 par->cmap_regs[TVPADDRW] = 0;           eieio();
1130                 for (x = 0; x < 0x200; x++) {
1131                         par->cmap_regs[TVPCRDAT] = 0x00;        eieio();
1132                 }
1133                 for (x = 0; x < 0x200; x++) {
1134                         par->cmap_regs[TVPCRDAT] = 0xff;        eieio();
1135                 }
1136                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1137                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1138                 for (y = 0; y < height; y++)
1139                         for (x = 0; x < width >> 3; x++) {
1140                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1141                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1142                         }
1143                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1144                 par->cmap_regs[TVPIDATA] |= 0x08;       eieio();
1145                 for (y = 0; y < height; y++)
1146                         for (x = 0; x < width >> 3; x++) {
1147                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1148                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1149                         }
1150                 par->cmap_regs[TVPCADRW] = 0x00;        eieio();
1151                 for (x = 0; x < 12; x++) {
1152                         par->cmap_regs[TVPCDATA] = fgc;
1153                         eieio();
1154                 }
1155         }
1156         return 1;
1157 }
1158
1159 static void
1160 imstt_set_cursor(struct imstt_par *par, struct fb_image *d, int on)
1161 {
1162         if (par->ramdac == IBM) {
1163                 par->cmap_regs[PIDXHI] = 0;     eieio();
1164                 if (!on) {
1165                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1166                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1167                 } else {
1168                         par->cmap_regs[PIDXLO] = CURSXHI;       eieio();
1169                         par->cmap_regs[PIDXDATA] = d->dx >> 8;  eieio();
1170                         par->cmap_regs[PIDXLO] = CURSXLO;       eieio();
1171                         par->cmap_regs[PIDXDATA] = d->dx & 0xff;eieio();
1172                         par->cmap_regs[PIDXLO] = CURSYHI;       eieio();
1173                         par->cmap_regs[PIDXDATA] = d->dy >> 8;  eieio();
1174                         par->cmap_regs[PIDXLO] = CURSYLO;       eieio();
1175                         par->cmap_regs[PIDXDATA] = d->dy & 0xff;eieio();
1176                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1177                         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
1178                 }
1179         } else {
1180                 if (!on) {
1181                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1182                         par->cmap_regs[TVPIDATA] = 0x00;        eieio();
1183                 } else {
1184                         __u16 x = d->dx + 0x40, y = d->dy + 0x40;
1185
1186                         par->cmap_regs[TVPCXPOH] = x >> 8;      eieio();
1187                         par->cmap_regs[TVPCXPOL] = x & 0xff;    eieio();
1188                         par->cmap_regs[TVPCYPOH] = y >> 8;      eieio();
1189                         par->cmap_regs[TVPCYPOL] = y & 0xff;    eieio();
1190                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1191                         par->cmap_regs[TVPIDATA] = 0x02;        eieio();
1192                 }
1193         }
1194 }
1195
1196 static int
1197 imsttfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1198 {
1199         struct imstt_par *par = info->par;
1200         u32 flags = cursor->set, fg, bg, xx, yy;
1201
1202         if (cursor->dest == NULL && cursor->rop == ROP_XOR)
1203                 return 1;
1204
1205         imstt_set_cursor(info, cursor, 0);
1206
1207         if (flags & FB_CUR_SETPOS) {
1208                 xx = cursor->image.dx - info->var.xoffset;
1209                 yy = cursor->image.dy - info->var.yoffset;
1210         }
1211
1212         if (flags & FB_CUR_SETSIZE) {
1213         }
1214
1215         if (flags & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP)) {
1216                 int fg_idx = cursor->image.fg_color;
1217                 int width = (cursor->image.width+7)/8;
1218                 u8 *dat = (u8 *) cursor->image.data;
1219                 u8 *dst = (u8 *) cursor->dest;
1220                 u8 *msk = (u8 *) cursor->mask;
1221
1222                 switch (cursor->rop) {
1223                 case ROP_XOR:
1224                         for (i = 0; i < cursor->image.height; i++) {
1225                                 for (j = 0; j < width; j++) {
1226                                         d_idx = i * MAX_CURS/8  + j;
1227                                         data[d_idx] =  byte_rev[dat[s_idx] ^
1228                                                                 dst[s_idx]];
1229                                         mask[d_idx] = byte_rev[msk[s_idx]];
1230                                         s_idx++;
1231                                 }
1232                         }
1233                         break;
1234                 case ROP_COPY:
1235                 default:
1236                         for (i = 0; i < cursor->image.height; i++) {
1237                                 for (j = 0; j < width; j++) {
1238                                         d_idx = i * MAX_CURS/8 + j;
1239                                         data[d_idx] = byte_rev[dat[s_idx]];
1240                                         mask[d_idx] = byte_rev[msk[s_idx]];
1241                                         s_idx++;
1242                                 }
1243                         }
1244                         break;
1245                 }
1246
1247                 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1248                      ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1249                      ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1 << 15;
1250
1251                 imsttfb_load_cursor_image(par, xx, yy, fgc);
1252         }
1253         if (cursor->enable)
1254                 imstt_set_cursor(info, cursor, 1);
1255         return 0;
1256 }
1257 #endif
1258
1259 #define FBIMSTT_SETREG          0x545401
1260 #define FBIMSTT_GETREG          0x545402
1261 #define FBIMSTT_SETCMAPREG      0x545403
1262 #define FBIMSTT_GETCMAPREG      0x545404
1263 #define FBIMSTT_SETIDXREG       0x545405
1264 #define FBIMSTT_GETIDXREG       0x545406
1265
1266 static int
1267 imsttfb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
1268 {
1269         struct imstt_par *par = info->par;
1270         void __user *argp = (void __user *)arg;
1271         __u32 reg[2];
1272         __u8 idx[2];
1273
1274         switch (cmd) {
1275                 case FBIMSTT_SETREG:
1276                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1277                                 return -EFAULT;
1278                         write_reg_le32(par->dc_regs, reg[0], reg[1]);
1279                         return 0;
1280                 case FBIMSTT_GETREG:
1281                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1282                                 return -EFAULT;
1283                         reg[1] = read_reg_le32(par->dc_regs, reg[0]);
1284                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1285                                 return -EFAULT;
1286                         return 0;
1287                 case FBIMSTT_SETCMAPREG:
1288                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1289                                 return -EFAULT;
1290                         write_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0], reg[1]);
1291                         return 0;
1292                 case FBIMSTT_GETCMAPREG:
1293                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1294                                 return -EFAULT;
1295                         reg[1] = read_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0]);
1296                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1297                                 return -EFAULT;
1298                         return 0;
1299                 case FBIMSTT_SETIDXREG:
1300                         if (copy_from_user(idx, argp, 2))
1301                                 return -EFAULT;
1302                         par->cmap_regs[PIDXHI] = 0;             eieio();
1303                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1304                         par->cmap_regs[PIDXDATA] = idx[1];      eieio();
1305                         return 0;
1306                 case FBIMSTT_GETIDXREG:
1307                         if (copy_from_user(idx, argp, 1))
1308                                 return -EFAULT;
1309                         par->cmap_regs[PIDXHI] = 0;             eieio();
1310                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1311                         idx[1] = par->cmap_regs[PIDXDATA];
1312                         if (copy_to_user((void __user *)(arg + 1), &idx[1], 1))
1313                                 return -EFAULT;
1314                         return 0;
1315                 default:
1316                         return -ENOIOCTLCMD;
1317         }
1318 }
1319
1320 static const struct pci_device_id imsttfb_pci_tbl[] = {
1321         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT128,
1322           PCI_ANY_ID, PCI_ANY_ID, 0, 0, IBM },
1323         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT3D,
1324           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TVP },
1325         { 0, }
1326 };
1327
1328 MODULE_DEVICE_TABLE(pci, imsttfb_pci_tbl);
1329
1330 static struct pci_driver imsttfb_pci_driver = {
1331         .name =         "imsttfb",
1332         .id_table =     imsttfb_pci_tbl,
1333         .probe =        imsttfb_probe,
1334         .remove =       imsttfb_remove,
1335 };
1336
1337 static const struct fb_ops imsttfb_ops = {
1338         .owner          = THIS_MODULE,
1339         .fb_check_var   = imsttfb_check_var,
1340         .fb_set_par     = imsttfb_set_par,
1341         .fb_setcolreg   = imsttfb_setcolreg,
1342         .fb_pan_display = imsttfb_pan_display,
1343         .fb_blank       = imsttfb_blank,
1344         .fb_fillrect    = imsttfb_fillrect,
1345         .fb_copyarea    = imsttfb_copyarea,
1346         .fb_imageblit   = cfb_imageblit,
1347         .fb_ioctl       = imsttfb_ioctl,
1348 };
1349
1350 static int init_imstt(struct fb_info *info)
1351 {
1352         struct imstt_par *par = info->par;
1353         __u32 i, tmp, *ip, *end;
1354
1355         tmp = read_reg_le32(par->dc_regs, PRC);
1356         if (par->ramdac == IBM)
1357                 info->fix.smem_len = (tmp & 0x0004) ? 0x400000 : 0x200000;
1358         else
1359                 info->fix.smem_len = 0x800000;
1360
1361         ip = (__u32 *)info->screen_base;
1362         end = (__u32 *)(info->screen_base + info->fix.smem_len);
1363         while (ip < end)
1364                 *ip++ = 0;
1365
1366         /* initialize the card */
1367         tmp = read_reg_le32(par->dc_regs, STGCTL);
1368         write_reg_le32(par->dc_regs, STGCTL, tmp & ~0x1);
1369         write_reg_le32(par->dc_regs, SSR, 0);
1370
1371         /* set default values for DAC registers */
1372         if (par->ramdac == IBM) {
1373                 par->cmap_regs[PPMASK] = 0xff;
1374                 eieio();
1375                 par->cmap_regs[PIDXHI] = 0;
1376                 eieio();
1377                 for (i = 0; i < ARRAY_SIZE(ibm_initregs); i++) {
1378                         par->cmap_regs[PIDXLO] = ibm_initregs[i].addr;
1379                         eieio();
1380                         par->cmap_regs[PIDXDATA] = ibm_initregs[i].value;
1381                         eieio();
1382                 }
1383         } else {
1384                 for (i = 0; i < ARRAY_SIZE(tvp_initregs); i++) {
1385                         par->cmap_regs[TVPADDRW] = tvp_initregs[i].addr;
1386                         eieio();
1387                         par->cmap_regs[TVPIDATA] = tvp_initregs[i].value;
1388                         eieio();
1389                 }
1390         }
1391
1392 #if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
1393         if (IS_REACHABLE(CONFIG_NVRAM) && machine_is(powermac)) {
1394                 int vmode = init_vmode, cmode = init_cmode;
1395
1396                 if (vmode == -1) {
1397                         vmode = nvram_read_byte(NV_VMODE);
1398                         if (vmode <= 0 || vmode > VMODE_MAX)
1399                                 vmode = VMODE_640_480_67;
1400                 }
1401                 if (cmode == -1) {
1402                         cmode = nvram_read_byte(NV_CMODE);
1403                         if (cmode < CMODE_8 || cmode > CMODE_32)
1404                                 cmode = CMODE_8;
1405                 }
1406                 if (mac_vmode_to_var(vmode, cmode, &info->var)) {
1407                         info->var.xres = info->var.xres_virtual = INIT_XRES;
1408                         info->var.yres = info->var.yres_virtual = INIT_YRES;
1409                         info->var.bits_per_pixel = INIT_BPP;
1410                 }
1411         } else
1412 #endif
1413         {
1414                 info->var.xres = info->var.xres_virtual = INIT_XRES;
1415                 info->var.yres = info->var.yres_virtual = INIT_YRES;
1416                 info->var.bits_per_pixel = INIT_BPP;
1417         }
1418
1419         if ((info->var.xres * info->var.yres) * (info->var.bits_per_pixel >> 3) > info->fix.smem_len
1420             || !(compute_imstt_regvals(par, info->var.xres, info->var.yres))) {
1421                 printk("imsttfb: %ux%ux%u not supported\n", info->var.xres, info->var.yres, info->var.bits_per_pixel);
1422                 framebuffer_release(info);
1423                 return -ENODEV;
1424         }
1425
1426         sprintf(info->fix.id, "IMS TT (%s)", par->ramdac == IBM ? "IBM" : "TVP");
1427         info->fix.mmio_len = 0x1000;
1428         info->fix.accel = FB_ACCEL_IMS_TWINTURBO;
1429         info->fix.type = FB_TYPE_PACKED_PIXELS;
1430         info->fix.visual = info->var.bits_per_pixel == 8 ? FB_VISUAL_PSEUDOCOLOR
1431                                                         : FB_VISUAL_DIRECTCOLOR;
1432         info->fix.line_length = info->var.xres * (info->var.bits_per_pixel >> 3);
1433         info->fix.xpanstep = 8;
1434         info->fix.ypanstep = 1;
1435         info->fix.ywrapstep = 0;
1436
1437         info->var.accel_flags = FB_ACCELF_TEXT;
1438
1439 //      if (par->ramdac == IBM)
1440 //              imstt_cursor_init(info);
1441         if (info->var.green.length == 6)
1442                 set_565(par);
1443         else
1444                 set_555(par);
1445         set_imstt_regvals(info, info->var.bits_per_pixel);
1446
1447         info->var.pixclock = 1000000 / getclkMHz(par);
1448
1449         info->fbops = &imsttfb_ops;
1450         info->flags = FBINFO_DEFAULT |
1451                       FBINFO_HWACCEL_COPYAREA |
1452                       FBINFO_HWACCEL_FILLRECT |
1453                       FBINFO_HWACCEL_YPAN;
1454
1455         fb_alloc_cmap(&info->cmap, 0, 0);
1456
1457         if (register_framebuffer(info) < 0) {
1458                 framebuffer_release(info);
1459                 return -ENODEV;
1460         }
1461
1462         tmp = (read_reg_le32(par->dc_regs, SSTATUS) & 0x0f00) >> 8;
1463         fb_info(info, "%s frame buffer; %uMB vram; chip version %u\n",
1464                 info->fix.id, info->fix.smem_len >> 20, tmp);
1465         return 0;
1466 }
1467
1468 static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1469 {
1470         unsigned long addr, size;
1471         struct imstt_par *par;
1472         struct fb_info *info;
1473         struct device_node *dp;
1474         int ret;
1475
1476         ret = aperture_remove_conflicting_pci_devices(pdev, "imsttfb");
1477         if (ret)
1478                 return ret;
1479         ret = -ENOMEM;
1480
1481         dp = pci_device_to_OF_node(pdev);
1482         if(dp)
1483                 printk(KERN_INFO "%s: OF name %pOFn\n",__func__, dp);
1484         else if (IS_ENABLED(CONFIG_OF))
1485                 printk(KERN_ERR "imsttfb: no OF node for pci device\n");
1486
1487         info = framebuffer_alloc(sizeof(struct imstt_par), &pdev->dev);
1488         if (!info)
1489                 return -ENOMEM;
1490
1491         par = info->par;
1492
1493         addr = pci_resource_start (pdev, 0);
1494         size = pci_resource_len (pdev, 0);
1495
1496         if (!request_mem_region(addr, size, "imsttfb")) {
1497                 printk(KERN_ERR "imsttfb: Can't reserve memory region\n");
1498                 framebuffer_release(info);
1499                 return -ENODEV;
1500         }
1501
1502         switch (pdev->device) {
1503                 case PCI_DEVICE_ID_IMS_TT128: /* IMS,tt128mbA */
1504                         par->ramdac = IBM;
1505                         if (of_node_name_eq(dp, "IMS,tt128mb8") ||
1506                             of_node_name_eq(dp, "IMS,tt128mb8A"))
1507                                 par->ramdac = TVP;
1508                         break;
1509                 case PCI_DEVICE_ID_IMS_TT3D:  /* IMS,tt3d */
1510                         par->ramdac = TVP;
1511                         break;
1512                 default:
1513                         printk(KERN_INFO "imsttfb: Device 0x%x unknown, "
1514                                          "contact maintainer.\n", pdev->device);
1515                         ret = -ENODEV;
1516                         goto error;
1517         }
1518
1519         info->fix.smem_start = addr;
1520         info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ?
1521                                             0x400000 : 0x800000);
1522         if (!info->screen_base)
1523                 goto error;
1524         info->fix.mmio_start = addr + 0x800000;
1525         par->dc_regs = ioremap(addr + 0x800000, 0x1000);
1526         if (!par->dc_regs)
1527                 goto error;
1528         par->cmap_regs_phys = addr + 0x840000;
1529         par->cmap_regs = (__u8 *)ioremap(addr + 0x840000, 0x1000);
1530         if (!par->cmap_regs)
1531                 goto error;
1532         info->pseudo_palette = par->palette;
1533         ret = init_imstt(info);
1534         if (!ret)
1535                 pci_set_drvdata(pdev, info);
1536         return ret;
1537
1538 error:
1539         if (par->dc_regs)
1540                 iounmap(par->dc_regs);
1541         if (info->screen_base)
1542                 iounmap(info->screen_base);
1543         release_mem_region(addr, size);
1544         framebuffer_release(info);
1545         return ret;
1546 }
1547
1548 static void imsttfb_remove(struct pci_dev *pdev)
1549 {
1550         struct fb_info *info = pci_get_drvdata(pdev);
1551         struct imstt_par *par = info->par;
1552         int size = pci_resource_len(pdev, 0);
1553
1554         unregister_framebuffer(info);
1555         iounmap(par->cmap_regs);
1556         iounmap(par->dc_regs);
1557         iounmap(info->screen_base);
1558         release_mem_region(info->fix.smem_start, size);
1559         framebuffer_release(info);
1560 }
1561
1562 #ifndef MODULE
1563 static int __init
1564 imsttfb_setup(char *options)
1565 {
1566         char *this_opt;
1567
1568         if (!options || !*options)
1569                 return 0;
1570
1571         while ((this_opt = strsep(&options, ",")) != NULL) {
1572                 if (!strncmp(this_opt, "font:", 5)) {
1573                         char *p;
1574                         int i;
1575
1576                         p = this_opt + 5;
1577                         for (i = 0; i < sizeof(fontname) - 1; i++)
1578                                 if (!*p || *p == ' ' || *p == ',')
1579                                         break;
1580                         memcpy(fontname, this_opt + 5, i);
1581                         fontname[i] = 0;
1582                 } else if (!strncmp(this_opt, "inverse", 7)) {
1583                         inverse = 1;
1584                         fb_invert_cmaps();
1585                 }
1586 #if defined(CONFIG_PPC_PMAC)
1587                 else if (!strncmp(this_opt, "vmode:", 6)) {
1588                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
1589                         if (vmode > 0 && vmode <= VMODE_MAX)
1590                                 init_vmode = vmode;
1591                 } else if (!strncmp(this_opt, "cmode:", 6)) {
1592                         int cmode = simple_strtoul(this_opt+6, NULL, 0);
1593                         switch (cmode) {
1594                                 case CMODE_8:
1595                                 case 8:
1596                                         init_cmode = CMODE_8;
1597                                         break;
1598                                 case CMODE_16:
1599                                 case 15:
1600                                 case 16:
1601                                         init_cmode = CMODE_16;
1602                                         break;
1603                                 case CMODE_32:
1604                                 case 24:
1605                                 case 32:
1606                                         init_cmode = CMODE_32;
1607                                         break;
1608                         }
1609                 }
1610 #endif
1611         }
1612         return 0;
1613 }
1614
1615 #endif /* MODULE */
1616
1617 static int __init imsttfb_init(void)
1618 {
1619 #ifndef MODULE
1620         char *option = NULL;
1621 #endif
1622
1623         if (fb_modesetting_disabled("imsttfb"))
1624                 return -ENODEV;
1625
1626 #ifndef MODULE
1627         if (fb_get_options("imsttfb", &option))
1628                 return -ENODEV;
1629
1630         imsttfb_setup(option);
1631 #endif
1632         return pci_register_driver(&imsttfb_pci_driver);
1633 }
1634
1635 static void __exit imsttfb_exit(void)
1636 {
1637         pci_unregister_driver(&imsttfb_pci_driver);
1638 }
1639
1640 MODULE_LICENSE("GPL");
1641
1642 module_init(imsttfb_init);
1643 module_exit(imsttfb_exit);
1644