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