git.oblomov.eu Git - linux-2.6/blob - 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/slab.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)
  35 #include <linux/nvram.h>
  36 #include <asm/prom.h>
  37 #include <asm/pci-bridge.h>
  38 #include "macmodes.h"
  39 #endif
  40
  41 #ifndef __powerpc__
  42 #define eieio()         /* Enforce In-order Execution of I/O */
  43 #endif
  44
  45 /* TwinTurbo (Cosmo) registers */
  46 enum {
  47         S1SA    =  0, /* 0x00 */
  48         S2SA    =  1, /* 0x04 */
  49         SP      =  2, /* 0x08 */
  50         DSA     =  3, /* 0x0C */
  51         CNT     =  4, /* 0x10 */
  52         DP_OCTL =  5, /* 0x14 */
  53         CLR     =  6, /* 0x18 */
  54         BI      =  8, /* 0x20 */
  55         MBC     =  9, /* 0x24 */
  56         BLTCTL  = 10, /* 0x28 */
  57
  58         /* Scan Timing Generator Registers */
  59         HES     = 12, /* 0x30 */
  60         HEB     = 13, /* 0x34 */
  61         HSB     = 14, /* 0x38 */
  62         HT      = 15, /* 0x3C */
  63         VES     = 16, /* 0x40 */
  64         VEB     = 17, /* 0x44 */
  65         VSB     = 18, /* 0x48 */
  66         VT      = 19, /* 0x4C */
  67         HCIV    = 20, /* 0x50 */
  68         VCIV    = 21, /* 0x54 */
  69         TCDR    = 22, /* 0x58 */
  70         VIL     = 23, /* 0x5C */
  71         STGCTL  = 24, /* 0x60 */
  72
  73         /* Screen Refresh Generator Registers */
  74         SSR     = 25, /* 0x64 */
  75         HRIR    = 26, /* 0x68 */
  76         SPR     = 27, /* 0x6C */
  77         CMR     = 28, /* 0x70 */
  78         SRGCTL  = 29, /* 0x74 */
  79
  80         /* RAM Refresh Generator Registers */
  81         RRCIV   = 30, /* 0x78 */
  82         RRSC    = 31, /* 0x7C */
  83         RRCR    = 34, /* 0x88 */
  84
  85         /* System Registers */
  86         GIOE    = 32, /* 0x80 */
  87         GIO     = 33, /* 0x84 */
  88         SCR     = 35, /* 0x8C */
  89         SSTATUS = 36, /* 0x90 */
  90         PRC     = 37, /* 0x94 */
  91
  92 #if 0
  93         /* PCI Registers */
  94         DVID    = 0x00000000L,
  95         SC      = 0x00000004L,
  96         CCR     = 0x00000008L,
  97         OG      = 0x0000000CL,
  98         BARM    = 0x00000010L,
  99         BARER   = 0x00000030L,
 100 #endif
 101 };
 102
 103 /* IBM 624 RAMDAC Direct Registers */
 104 enum {
 105         PADDRW  = 0x00,
 106         PDATA   = 0x04,
 107         PPMASK  = 0x08,
 108         PADDRR  = 0x0c,
 109         PIDXLO  = 0x10,
 110         PIDXHI  = 0x14,
 111         PIDXDATA= 0x18,
 112         PIDXCTL = 0x1c
 113 };
 114
 115 /* IBM 624 RAMDAC Indirect Registers */
 116 enum {
 117         CLKCTL          = 0x02, /* (0x01) Miscellaneous Clock Control */
 118         SYNCCTL         = 0x03, /* (0x00) Sync Control */
 119         HSYNCPOS        = 0x04, /* (0x00) Horizontal Sync Position */
 120         PWRMNGMT        = 0x05, /* (0x00) Power Management */
 121         DACOP           = 0x06, /* (0x02) DAC Operation */
 122         PALETCTL        = 0x07, /* (0x00) Palette Control */
 123         SYSCLKCTL       = 0x08, /* (0x01) System Clock Control */
 124         PIXFMT          = 0x0a, /* () Pixel Format  [bpp >> 3 + 2] */
 125         BPP8            = 0x0b, /* () 8 Bits/Pixel Control */
 126         BPP16           = 0x0c, /* () 16 Bits/Pixel Control  [bit 1=1 for 565] */
 127         BPP24           = 0x0d, /* () 24 Bits/Pixel Control */
 128         BPP32           = 0x0e, /* () 32 Bits/Pixel Control */
 129         PIXCTL1         = 0x10, /* (0x05) Pixel PLL Control 1 */
 130         PIXCTL2         = 0x11, /* (0x00) Pixel PLL Control 2 */
 131         SYSCLKN         = 0x15, /* () System Clock N (System PLL Reference Divider) */
 132         SYSCLKM         = 0x16, /* () System Clock M (System PLL VCO Divider) */
 133         SYSCLKP         = 0x17, /* () System Clock P */
 134         SYSCLKC         = 0x18, /* () System Clock C */
 135         /*
 136          * Dot clock rate is 20MHz * (m + 1) / ((n + 1) * (p ? 2 * p : 1)
 137          * c is charge pump bias which depends on the VCO frequency
 138          */
 139         PIXM0           = 0x20, /* () Pixel M 0 */
 140         PIXN0           = 0x21, /* () Pixel N 0 */
 141         PIXP0           = 0x22, /* () Pixel P 0 */
 142         PIXC0           = 0x23, /* () Pixel C 0 */
 143         CURSCTL         = 0x30, /* (0x00) Cursor Control */
 144         CURSXLO         = 0x31, /* () Cursor X position, low 8 bits */
 145         CURSXHI         = 0x32, /* () Cursor X position, high 8 bits */
 146         CURSYLO         = 0x33, /* () Cursor Y position, low 8 bits */
 147         CURSYHI         = 0x34, /* () Cursor Y position, high 8 bits */
 148         CURSHOTX        = 0x35, /* () Cursor Hot Spot X */
 149         CURSHOTY        = 0x36, /* () Cursor Hot Spot Y */
 150         CURSACCTL       = 0x37, /* () Advanced Cursor Control Enable */
 151         CURSACATTR      = 0x38, /* () Advanced Cursor Attribute */
 152         CURS1R          = 0x40, /* () Cursor 1 Red */
 153         CURS1G          = 0x41, /* () Cursor 1 Green */
 154         CURS1B          = 0x42, /* () Cursor 1 Blue */
 155         CURS2R          = 0x43, /* () Cursor 2 Red */
 156         CURS2G          = 0x44, /* () Cursor 2 Green */
 157         CURS2B          = 0x45, /* () Cursor 2 Blue */
 158         CURS3R          = 0x46, /* () Cursor 3 Red */
 159         CURS3G          = 0x47, /* () Cursor 3 Green */
 160         CURS3B          = 0x48, /* () Cursor 3 Blue */
 161         BORDR           = 0x60, /* () Border Color Red */
 162         BORDG           = 0x61, /* () Border Color Green */
 163         BORDB           = 0x62, /* () Border Color Blue */
 164         MISCTL1         = 0x70, /* (0x00) Miscellaneous Control 1 */
 165         MISCTL2         = 0x71, /* (0x00) Miscellaneous Control 2 */
 166         MISCTL3         = 0x72, /* (0x00) Miscellaneous Control 3 */
 167         KEYCTL          = 0x78  /* (0x00) Key Control/DB Operation */
 168 };
 169
 170 /* TI TVP 3030 RAMDAC Direct Registers */
 171 enum {
 172         TVPADDRW = 0x00,        /* 0  Palette/Cursor RAM Write Address/Index */
 173         TVPPDATA = 0x04,        /* 1  Palette Data RAM Data */
 174         TVPPMASK = 0x08,        /* 2  Pixel Read-Mask */
 175         TVPPADRR = 0x0c,        /* 3  Palette/Cursor RAM Read Address */
 176         TVPCADRW = 0x10,        /* 4  Cursor/Overscan Color Write Address */
 177         TVPCDATA = 0x14,        /* 5  Cursor/Overscan Color Data */
 178                                 /* 6  reserved */
 179         TVPCADRR = 0x1c,        /* 7  Cursor/Overscan Color Read Address */
 180                                 /* 8  reserved */
 181         TVPDCCTL = 0x24,        /* 9  Direct Cursor Control */
 182         TVPIDATA = 0x28,        /* 10 Index Data */
 183         TVPCRDAT = 0x2c,        /* 11 Cursor RAM Data */
 184         TVPCXPOL = 0x30,        /* 12 Cursor-Position X LSB */
 185         TVPCXPOH = 0x34,        /* 13 Cursor-Position X MSB */
 186         TVPCYPOL = 0x38,        /* 14 Cursor-Position Y LSB */
 187         TVPCYPOH = 0x3c,        /* 15 Cursor-Position Y MSB */
 188 };
 189
 190 /* TI TVP 3030 RAMDAC Indirect Registers */
 191 enum {
 192         TVPIRREV = 0x01,        /* Silicon Revision [RO] */
 193         TVPIRICC = 0x06,        /* Indirect Cursor Control      (0x00) */
 194         TVPIRBRC = 0x07,        /* Byte Router Control  (0xe4) */
 195         TVPIRLAC = 0x0f,        /* Latch Control                (0x06) */
 196         TVPIRTCC = 0x18,        /* True Color Control   (0x80) */
 197         TVPIRMXC = 0x19,        /* Multiplex Control            (0x98) */
 198         TVPIRCLS = 0x1a,        /* Clock Selection              (0x07) */
 199         TVPIRPPG = 0x1c,        /* Palette Page         (0x00) */
 200         TVPIRGEC = 0x1d,        /* General Control              (0x00) */
 201         TVPIRMIC = 0x1e,        /* Miscellaneous Control        (0x00) */
 202         TVPIRPLA = 0x2c,        /* PLL Address */
 203         TVPIRPPD = 0x2d,        /* Pixel Clock PLL Data */
 204         TVPIRMPD = 0x2e,        /* Memory Clock PLL Data */
 205         TVPIRLPD = 0x2f,        /* Loop Clock PLL Data */
 206         TVPIRCKL = 0x30,        /* Color-Key Overlay Low */
 207         TVPIRCKH = 0x31,        /* Color-Key Overlay High */
 208         TVPIRCRL = 0x32,        /* Color-Key Red Low */
 209         TVPIRCRH = 0x33,        /* Color-Key Red High */
 210         TVPIRCGL = 0x34,        /* Color-Key Green Low */
 211         TVPIRCGH = 0x35,        /* Color-Key Green High */
 212         TVPIRCBL = 0x36,        /* Color-Key Blue Low */
 213         TVPIRCBH = 0x37,        /* Color-Key Blue High */
 214         TVPIRCKC = 0x38,        /* Color-Key Control            (0x00) */
 215         TVPIRMLC = 0x39,        /* MCLK/Loop Clock Control      (0x18) */
 216         TVPIRSEN = 0x3a,        /* Sense Test                   (0x00) */
 217         TVPIRTMD = 0x3b,        /* Test Mode Data */
 218         TVPIRRML = 0x3c,        /* CRC Remainder LSB [RO] */
 219         TVPIRRMM = 0x3d,        /* CRC Remainder MSB [RO] */
 220         TVPIRRMS = 0x3e,        /* CRC  Bit Select [WO] */
 221         TVPIRDID = 0x3f,        /* Device ID [RO]               (0x30) */
 222         TVPIRRES = 0xff         /* Software Reset [WO] */
 223 };
 224
 225 struct initvalues {
 226         __u8 addr, value;
 227 };
 228
 229 static struct initvalues ibm_initregs[] __devinitdata = {
 230         { CLKCTL,       0x21 },
 231         { SYNCCTL,      0x00 },
 232         { HSYNCPOS,     0x00 },
 233         { PWRMNGMT,     0x00 },
 234         { DACOP,        0x02 },
 235         { PALETCTL,     0x00 },
 236         { SYSCLKCTL,    0x01 },
 237
 238         /*
 239          * Note that colors in X are correct only if all video data is
 240          * passed through the palette in the DAC.  That is, "indirect
 241          * color" must be configured.  This is the case for the IBM DAC
 242          * used in the 2MB and 4MB cards, at least.
 243          */
 244         { BPP8,         0x00 },
 245         { BPP16,        0x01 },
 246         { BPP24,        0x00 },
 247         { BPP32,        0x00 },
 248
 249         { PIXCTL1,      0x05 },
 250         { PIXCTL2,      0x00 },
 251         { SYSCLKN,      0x08 },
 252         { SYSCLKM,      0x4f },
 253         { SYSCLKP,      0x00 },
 254         { SYSCLKC,      0x00 },
 255         { CURSCTL,      0x00 },
 256         { CURSACCTL,    0x01 },
 257         { CURSACATTR,   0xa8 },
 258         { CURS1R,       0xff },
 259         { CURS1G,       0xff },
 260         { CURS1B,       0xff },
 261         { CURS2R,       0xff },
 262         { CURS2G,       0xff },
 263         { CURS2B,       0xff },
 264         { CURS3R,       0xff },
 265         { CURS3G,       0xff },
 266         { CURS3B,       0xff },
 267         { BORDR,        0xff },
 268         { BORDG,        0xff },
 269         { BORDB,        0xff },
 270         { MISCTL1,      0x01 },
 271         { MISCTL2,      0x45 },
 272         { MISCTL3,      0x00 },
 273         { KEYCTL,       0x00 }
 274 };
 275
 276 static struct initvalues tvp_initregs[] __devinitdata = {
 277         { TVPIRICC,     0x00 },
 278         { TVPIRBRC,     0xe4 },
 279         { TVPIRLAC,     0x06 },
 280         { TVPIRTCC,     0x80 },
 281         { TVPIRMXC,     0x4d },
 282         { TVPIRCLS,     0x05 },
 283         { TVPIRPPG,     0x00 },
 284         { TVPIRGEC,     0x00 },
 285         { TVPIRMIC,     0x08 },
 286         { TVPIRCKL,     0xff },
 287         { TVPIRCKH,     0xff },
 288         { TVPIRCRL,     0xff },
 289         { TVPIRCRH,     0xff },
 290         { TVPIRCGL,     0xff },
 291         { TVPIRCGH,     0xff },
 292         { TVPIRCBL,     0xff },
 293         { TVPIRCBH,     0xff },
 294         { TVPIRCKC,     0x00 },
 295         { TVPIRPLA,     0x00 },
 296         { TVPIRPPD,     0xc0 },
 297         { TVPIRPPD,     0xd5 },
 298         { TVPIRPPD,     0xea },
 299         { TVPIRPLA,     0x00 },
 300         { TVPIRMPD,     0xb9 },
 301         { TVPIRMPD,     0x3a },
 302         { TVPIRMPD,     0xb1 },
 303         { TVPIRPLA,     0x00 },
 304         { TVPIRLPD,     0xc1 },
 305         { TVPIRLPD,     0x3d },
 306         { TVPIRLPD,     0xf3 },
 307 };
 308
 309 struct imstt_regvals {
 310         __u32 pitch;
 311         __u16 hes, heb, hsb, ht, ves, veb, vsb, vt, vil;
 312         __u8 pclk_m, pclk_n, pclk_p;
 313         /* Values of the tvp which change depending on colormode x resolution */
 314         __u8 mlc[3];    /* Memory Loop Config 0x39 */
 315         __u8 lckl_p[3]; /* P value of LCKL PLL */
 316 };
 317
 318 struct imstt_par {
 319         struct imstt_regvals init;
 320         __u32 __iomem *dc_regs;
 321         unsigned long cmap_regs_phys;
 322         __u8 *cmap_regs;
 323         __u32 ramdac;
 324         __u32 palette[16];
 325 };
 326
 327 enum {
 328         IBM = 0,
 329         TVP = 1
 330 };
 331
 332 #define USE_NV_MODES            1
 333 #define INIT_BPP                8
 334 #define INIT_XRES               640
 335 #define INIT_YRES               480
 336
 337 static int inverse = 0;
 338 static char fontname[40] __initdata = { 0 };
 339 #if defined(CONFIG_PPC)
 340 static signed char init_vmode __devinitdata = -1, init_cmode __devinitdata = -1;
 341 #endif
 342
 343 static struct imstt_regvals tvp_reg_init_2 = {
 344         512,
 345         0x0002, 0x0006, 0x0026, 0x0028, 0x0003, 0x0016, 0x0196, 0x0197, 0x0196,
 346         0xec, 0x2a, 0xf3,
 347         { 0x3c, 0x3b, 0x39 }, { 0xf3, 0xf3, 0xf3 }
 348 };
 349
 350 static struct imstt_regvals tvp_reg_init_6 = {
 351         640,
 352         0x0004, 0x0009, 0x0031, 0x0036, 0x0003, 0x002a, 0x020a, 0x020d, 0x020a,
 353         0xef, 0x2e, 0xb2,
 354         { 0x39, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 355 };
 356
 357 static struct imstt_regvals tvp_reg_init_12 = {
 358         800,
 359         0x0005, 0x000e, 0x0040, 0x0042, 0x0003, 0x018, 0x270, 0x271, 0x270,
 360         0xf6, 0x2e, 0xf2,
 361         { 0x3a, 0x39, 0x38 }, { 0xf3, 0xf3, 0xf3 }
 362 };
 363
 364 static struct imstt_regvals tvp_reg_init_13 = {
 365         832,
 366         0x0004, 0x0011, 0x0045, 0x0048, 0x0003, 0x002a, 0x029a, 0x029b, 0x0000,
 367         0xfe, 0x3e, 0xf1,
 368         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 369 };
 370
 371 static struct imstt_regvals tvp_reg_init_17 = {
 372         1024,
 373         0x0006, 0x0210, 0x0250, 0x0053, 0x1003, 0x0021, 0x0321, 0x0324, 0x0000,
 374         0xfc, 0x3a, 0xf1,
 375         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 376 };
 377
 378 static struct imstt_regvals tvp_reg_init_18 = {
 379         1152,
 380         0x0009, 0x0011, 0x059, 0x5b, 0x0003, 0x0031, 0x0397, 0x039a, 0x0000,
 381         0xfd, 0x3a, 0xf1,
 382         { 0x39, 0x38, 0x38 }, { 0xf3, 0xf3, 0xf2 }
 383 };
 384
 385 static struct imstt_regvals tvp_reg_init_19 = {
 386         1280,
 387         0x0009, 0x0016, 0x0066, 0x0069, 0x0003, 0x0027, 0x03e7, 0x03e8, 0x03e7,
 388         0xf7, 0x36, 0xf0,
 389         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 390 };
 391
 392 static struct imstt_regvals tvp_reg_init_20 = {
 393         1280,
 394         0x0009, 0x0018, 0x0068, 0x006a, 0x0003, 0x0029, 0x0429, 0x042a, 0x0000,
 395         0xf0, 0x2d, 0xf0,
 396         { 0x38, 0x38, 0x38 }, { 0xf3, 0xf2, 0xf1 }
 397 };
 398
 399 /*
 400  * PCI driver prototypes
 401  */
 402 static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 403 static void imsttfb_remove(struct pci_dev *pdev);
 404
 405 /*
 406  * Register access
 407  */
 408 static inline u32 read_reg_le32(volatile u32 __iomem *base, int regindex)
 409 {
 410 #ifdef __powerpc__
 411         return in_le32(base + regindex);
 412 #else
 413         return readl(base + regindex);
 414 #endif
 415 }
 416
 417 static inline void write_reg_le32(volatile u32 __iomem *base, int regindex, u32 val)
 418 {
 419 #ifdef __powerpc__
 420         out_le32(base + regindex, val);
 421 #else
 422         writel(val, base + regindex);
 423 #endif
 424 }
 425
 426 static __u32
 427 getclkMHz(struct imstt_par *par)
 428 {
 429         __u32 clk_m, clk_n, clk_p;
 430
 431         clk_m = par->init.pclk_m;
 432         clk_n = par->init.pclk_n;
 433         clk_p = par->init.pclk_p;
 434
 435         return 20 * (clk_m + 1) / ((clk_n + 1) * (clk_p ? 2 * clk_p : 1));
 436 }
 437
 438 static void
 439 setclkMHz(struct imstt_par *par, __u32 MHz)
 440 {
 441         __u32 clk_m, clk_n, x, stage, spilled;
 442
 443         clk_m = clk_n = 0;
 444         stage = spilled = 0;
 445         for (;;) {
 446                 switch (stage) {
 447                         case 0:
 448                                 clk_m++;
 449                                 break;
 450                         case 1:
 451                                 clk_n++;
 452                                 break;
 453                 }
 454                 x = 20 * (clk_m + 1) / (clk_n + 1);
 455                 if (x == MHz)
 456                         break;
 457                 if (x > MHz) {
 458                         spilled = 1;
 459                         stage = 1;
 460                 } else if (spilled && x < MHz) {
 461                         stage = 0;
 462                 }
 463         }
 464
 465         par->init.pclk_m = clk_m;
 466         par->init.pclk_n = clk_n;
 467         par->init.pclk_p = 0;
 468 }
 469
 470 static struct imstt_regvals *
 471 compute_imstt_regvals_ibm(struct imstt_par *par, int xres, int yres)
 472 {
 473         struct imstt_regvals *init = &par->init;
 474         __u32 MHz, hes, heb, veb, htp, vtp;
 475
 476         switch (xres) {
 477                 case 640:
 478                         hes = 0x0008; heb = 0x0012; veb = 0x002a; htp = 10; vtp = 2;
 479                         MHz = 30 /* .25 */ ;
 480                         break;
 481                 case 832:
 482                         hes = 0x0005; heb = 0x0020; veb = 0x0028; htp = 8; vtp = 3;
 483                         MHz = 57 /* .27_ */ ;
 484                         break;
 485                 case 1024:
 486                         hes = 0x000a; heb = 0x001c; veb = 0x0020; htp = 8; vtp = 3;
 487                         MHz = 80;
 488                         break;
 489                 case 1152:
 490                         hes = 0x0012; heb = 0x0022; veb = 0x0031; htp = 4; vtp = 3;
 491                         MHz = 101 /* .6_ */ ;
 492                         break;
 493                 case 1280:
 494                         hes = 0x0012; heb = 0x002f; veb = 0x0029; htp = 4; vtp = 1;
 495                         MHz = yres == 960 ? 126 : 135;
 496                         break;
 497                 case 1600:
 498                         hes = 0x0018; heb = 0x0040; veb = 0x002a; htp = 4; vtp = 3;
 499                         MHz = 200;
 500                         break;
 501                 default:
 502                         return NULL;
 503         }
 504
 505         setclkMHz(par, MHz);
 506
 507         init->hes = hes;
 508         init->heb = heb;
 509         init->hsb = init->heb + (xres >> 3);
 510         init->ht = init->hsb + htp;
 511         init->ves = 0x0003;
 512         init->veb = veb;
 513         init->vsb = init->veb + yres;
 514         init->vt = init->vsb + vtp;
 515         init->vil = init->vsb;
 516
 517         init->pitch = xres;
 518         return init;
 519 }
 520
 521 static struct imstt_regvals *
 522 compute_imstt_regvals_tvp(struct imstt_par *par, int xres, int yres)
 523 {
 524         struct imstt_regvals *init;
 525
 526         switch (xres) {
 527                 case 512:
 528                         init = &tvp_reg_init_2;
 529                         break;
 530                 case 640:
 531                         init = &tvp_reg_init_6;
 532                         break;
 533                 case 800:
 534                         init = &tvp_reg_init_12;
 535                         break;
 536                 case 832:
 537                         init = &tvp_reg_init_13;
 538                         break;
 539                 case 1024:
 540                         init = &tvp_reg_init_17;
 541                         break;
 542                 case 1152:
 543                         init = &tvp_reg_init_18;
 544                         break;
 545                 case 1280:
 546                         init = yres == 960 ? &tvp_reg_init_19 : &tvp_reg_init_20;
 547                         break;
 548                 default:
 549                         return NULL;
 550         }
 551         par->init = *init;
 552         return init;
 553 }
 554
 555 static struct imstt_regvals *
 556 compute_imstt_regvals (struct imstt_par *par, u_int xres, u_int yres)
 557 {
 558         if (par->ramdac == IBM)
 559                 return compute_imstt_regvals_ibm(par, xres, yres);
 560         else
 561                 return compute_imstt_regvals_tvp(par, xres, yres);
 562 }
 563
 564 static void
 565 set_imstt_regvals_ibm (struct imstt_par *par, u_int bpp)
 566 {
 567         struct imstt_regvals *init = &par->init;
 568         __u8 pformat = (bpp >> 3) + 2;
 569
 570         par->cmap_regs[PIDXHI] = 0;             eieio();
 571         par->cmap_regs[PIDXLO] = PIXM0;         eieio();
 572         par->cmap_regs[PIDXDATA] = init->pclk_m;eieio();
 573         par->cmap_regs[PIDXLO] = PIXN0;         eieio();
 574         par->cmap_regs[PIDXDATA] = init->pclk_n;eieio();
 575         par->cmap_regs[PIDXLO] = PIXP0;         eieio();
 576         par->cmap_regs[PIDXDATA] = init->pclk_p;eieio();
 577         par->cmap_regs[PIDXLO] = PIXC0;         eieio();
 578         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
 579
 580         par->cmap_regs[PIDXLO] = PIXFMT;        eieio();
 581         par->cmap_regs[PIDXDATA] = pformat;     eieio();
 582 }
 583
 584 static void
 585 set_imstt_regvals_tvp (struct imstt_par *par, u_int bpp)
 586 {
 587         struct imstt_regvals *init = &par->init;
 588         __u8 tcc, mxc, lckl_n, mic;
 589         __u8 mlc, lckl_p;
 590
 591         switch (bpp) {
 592                 default:
 593                 case 8:
 594                         tcc = 0x80;
 595                         mxc = 0x4d;
 596                         lckl_n = 0xc1;
 597                         mlc = init->mlc[0];
 598                         lckl_p = init->lckl_p[0];
 599                         break;
 600                 case 16:
 601                         tcc = 0x44;
 602                         mxc = 0x55;
 603                         lckl_n = 0xe1;
 604                         mlc = init->mlc[1];
 605                         lckl_p = init->lckl_p[1];
 606                         break;
 607                 case 24:
 608                         tcc = 0x5e;
 609                         mxc = 0x5d;
 610                         lckl_n = 0xf1;
 611                         mlc = init->mlc[2];
 612                         lckl_p = init->lckl_p[2];
 613                         break;
 614                 case 32:
 615                         tcc = 0x46;
 616                         mxc = 0x5d;
 617                         lckl_n = 0xf1;
 618                         mlc = init->mlc[2];
 619                         lckl_p = init->lckl_p[2];
 620                         break;
 621         }
 622         mic = 0x08;
 623
 624         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 625         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 626         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 627         par->cmap_regs[TVPIDATA] = init->pclk_m;        eieio();
 628         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 629         par->cmap_regs[TVPIDATA] = init->pclk_n;        eieio();
 630         par->cmap_regs[TVPADDRW] = TVPIRPPD;            eieio();
 631         par->cmap_regs[TVPIDATA] = init->pclk_p;        eieio();
 632
 633         par->cmap_regs[TVPADDRW] = TVPIRTCC;            eieio();
 634         par->cmap_regs[TVPIDATA] = tcc;                 eieio();
 635         par->cmap_regs[TVPADDRW] = TVPIRMXC;            eieio();
 636         par->cmap_regs[TVPIDATA] = mxc;                 eieio();
 637         par->cmap_regs[TVPADDRW] = TVPIRMIC;            eieio();
 638         par->cmap_regs[TVPIDATA] = mic;                 eieio();
 639
 640         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 641         par->cmap_regs[TVPIDATA] = 0x00;                eieio();
 642         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 643         par->cmap_regs[TVPIDATA] = lckl_n;              eieio();
 644
 645         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 646         par->cmap_regs[TVPIDATA] = 0x15;                eieio();
 647         par->cmap_regs[TVPADDRW] = TVPIRMLC;            eieio();
 648         par->cmap_regs[TVPIDATA] = mlc;                 eieio();
 649
 650         par->cmap_regs[TVPADDRW] = TVPIRPLA;            eieio();
 651         par->cmap_regs[TVPIDATA] = 0x2a;                eieio();
 652         par->cmap_regs[TVPADDRW] = TVPIRLPD;            eieio();
 653         par->cmap_regs[TVPIDATA] = lckl_p;              eieio();
 654 }
 655
 656 static void
 657 set_imstt_regvals (struct fb_info *info, u_int bpp)
 658 {
 659         struct imstt_par *par = info->par;
 660         struct imstt_regvals *init = &par->init;
 661         __u32 ctl, pitch, byteswap, scr;
 662
 663         if (par->ramdac == IBM)
 664                 set_imstt_regvals_ibm(par, bpp);
 665         else
 666                 set_imstt_regvals_tvp(par, bpp);
 667
 668   /*
 669    * From what I (jsk) can gather poking around with MacsBug,
 670    * bits 8 and 9 in the SCR register control endianness
 671    * correction (byte swapping).  These bits must be set according
 672    * to the color depth as follows:
 673    *     Color depth    Bit 9   Bit 8
 674    *     ==========     =====   =====
 675    *        8bpp          0       0
 676    *       16bpp          0       1
 677    *       32bpp          1       1
 678    */
 679         switch (bpp) {
 680                 default:
 681                 case 8:
 682                         ctl = 0x17b1;
 683                         pitch = init->pitch >> 2;
 684                         byteswap = 0x000;
 685                         break;
 686                 case 16:
 687                         ctl = 0x17b3;
 688                         pitch = init->pitch >> 1;
 689                         byteswap = 0x100;
 690                         break;
 691                 case 24:
 692                         ctl = 0x17b9;
 693                         pitch = init->pitch - (init->pitch >> 2);
 694                         byteswap = 0x200;
 695                         break;
 696                 case 32:
 697                         ctl = 0x17b5;
 698                         pitch = init->pitch;
 699                         byteswap = 0x300;
 700                         break;
 701         }
 702         if (par->ramdac == TVP)
 703                 ctl -= 0x30;
 704
 705         write_reg_le32(par->dc_regs, HES, init->hes);
 706         write_reg_le32(par->dc_regs, HEB, init->heb);
 707         write_reg_le32(par->dc_regs, HSB, init->hsb);
 708         write_reg_le32(par->dc_regs, HT, init->ht);
 709         write_reg_le32(par->dc_regs, VES, init->ves);
 710         write_reg_le32(par->dc_regs, VEB, init->veb);
 711         write_reg_le32(par->dc_regs, VSB, init->vsb);
 712         write_reg_le32(par->dc_regs, VT, init->vt);
 713         write_reg_le32(par->dc_regs, VIL, init->vil);
 714         write_reg_le32(par->dc_regs, HCIV, 1);
 715         write_reg_le32(par->dc_regs, VCIV, 1);
 716         write_reg_le32(par->dc_regs, TCDR, 4);
 717         write_reg_le32(par->dc_regs, RRCIV, 1);
 718         write_reg_le32(par->dc_regs, RRSC, 0x980);
 719         write_reg_le32(par->dc_regs, RRCR, 0x11);
 720
 721         if (par->ramdac == IBM) {
 722                 write_reg_le32(par->dc_regs, HRIR, 0x0100);
 723                 write_reg_le32(par->dc_regs, CMR, 0x00ff);
 724                 write_reg_le32(par->dc_regs, SRGCTL, 0x0073);
 725         } else {
 726                 write_reg_le32(par->dc_regs, HRIR, 0x0200);
 727                 write_reg_le32(par->dc_regs, CMR, 0x01ff);
 728                 write_reg_le32(par->dc_regs, SRGCTL, 0x0003);
 729         }
 730
 731         switch (info->fix.smem_len) {
 732                 case 0x200000:
 733                         scr = 0x059d | byteswap;
 734                         break;
 735                 /* case 0x400000:
 736                    case 0x800000: */
 737                 default:
 738                         pitch >>= 1;
 739                         scr = 0x150dd | byteswap;
 740                         break;
 741         }
 742
 743         write_reg_le32(par->dc_regs, SCR, scr);
 744         write_reg_le32(par->dc_regs, SPR, pitch);
 745         write_reg_le32(par->dc_regs, STGCTL, ctl);
 746 }
 747
 748 static inline void
 749 set_offset (struct fb_var_screeninfo *var, struct fb_info *info)
 750 {
 751         struct imstt_par *par = info->par;
 752         __u32 off = var->yoffset * (info->fix.line_length >> 3)
 753                     + ((var->xoffset * (var->bits_per_pixel >> 3)) >> 3);
 754         write_reg_le32(par->dc_regs, SSR, off);
 755 }
 756
 757 static inline void
 758 set_555 (struct imstt_par *par)
 759 {
 760         if (par->ramdac == IBM) {
 761                 par->cmap_regs[PIDXHI] = 0;             eieio();
 762                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 763                 par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 764         } else {
 765                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 766                 par->cmap_regs[TVPIDATA] = 0x44;        eieio();
 767         }
 768 }
 769
 770 static inline void
 771 set_565 (struct imstt_par *par)
 772 {
 773         if (par->ramdac == IBM) {
 774                 par->cmap_regs[PIDXHI] = 0;             eieio();
 775                 par->cmap_regs[PIDXLO] = BPP16;         eieio();
 776                 par->cmap_regs[PIDXDATA] = 0x03;        eieio();
 777         } else {
 778                 par->cmap_regs[TVPADDRW] = TVPIRTCC;    eieio();
 779                 par->cmap_regs[TVPIDATA] = 0x45;        eieio();
 780         }
 781 }
 782
 783 static int
 784 imsttfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 785 {
 786         if ((var->bits_per_pixel != 8 && var->bits_per_pixel != 16
 787             && var->bits_per_pixel != 24 && var->bits_per_pixel != 32)
 788             || var->xres_virtual < var->xres || var->yres_virtual < var->yres
 789             || var->nonstd
 790             || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
 791                 return -EINVAL;
 792
 793         if ((var->xres * var->yres) * (var->bits_per_pixel >> 3) > info->fix.smem_len
 794             || (var->xres_virtual * var->yres_virtual) * (var->bits_per_pixel >> 3) > info->fix.smem_len)
 795                 return -EINVAL;
 796
 797         switch (var->bits_per_pixel) {
 798                 case 8:
 799                         var->red.offset = 0;
 800                         var->red.length = 8;
 801                         var->green.offset = 0;
 802                         var->green.length = 8;
 803                         var->blue.offset = 0;
 804                         var->blue.length = 8;
 805                         var->transp.offset = 0;
 806                         var->transp.length = 0;
 807                         break;
 808                 case 16:        /* RGB 555 or 565 */
 809                         if (var->green.length != 6)
 810                                 var->red.offset = 10;
 811                         var->red.length = 5;
 812                         var->green.offset = 5;
 813                         if (var->green.length != 6)
 814                                 var->green.length = 5;
 815                         var->blue.offset = 0;
 816                         var->blue.length = 5;
 817                         var->transp.offset = 0;
 818                         var->transp.length = 0;
 819                         break;
 820                 case 24:        /* RGB 888 */
 821                         var->red.offset = 16;
 822                         var->red.length = 8;
 823                         var->green.offset = 8;
 824                         var->green.length = 8;
 825                         var->blue.offset = 0;
 826                         var->blue.length = 8;
 827                         var->transp.offset = 0;
 828                         var->transp.length = 0;
 829                         break;
 830                 case 32:        /* RGBA 8888 */
 831                         var->red.offset = 16;
 832                         var->red.length = 8;
 833                         var->green.offset = 8;
 834                         var->green.length = 8;
 835                         var->blue.offset = 0;
 836                         var->blue.length = 8;
 837                         var->transp.offset = 24;
 838                         var->transp.length = 8;
 839                         break;
 840         }
 841
 842         if (var->yres == var->yres_virtual) {
 843                 __u32 vram = (info->fix.smem_len - (PAGE_SIZE << 2));
 844                 var->yres_virtual = ((vram << 3) / var->bits_per_pixel) / var->xres_virtual;
 845                 if (var->yres_virtual < var->yres)
 846                         var->yres_virtual = var->yres;
 847         }
 848
 849         var->red.msb_right = 0;
 850         var->green.msb_right = 0;
 851         var->blue.msb_right = 0;
 852         var->transp.msb_right = 0;
 853         var->height = -1;
 854         var->width = -1;
 855         var->vmode = FB_VMODE_NONINTERLACED;
 856         var->left_margin = var->right_margin = 16;
 857         var->upper_margin = var->lower_margin = 16;
 858         var->hsync_len = var->vsync_len = 8;
 859         return 0;
 860 }
 861
 862 static int
 863 imsttfb_set_par(struct fb_info *info)
 864 {
 865         struct imstt_par *par = info->par;
 866
 867         if (!compute_imstt_regvals(par, info->var.xres, info->var.yres))
 868                 return -EINVAL;
 869
 870         if (info->var.green.length == 6)
 871                 set_565(par);
 872         else
 873                 set_555(par);
 874         set_imstt_regvals(info, info->var.bits_per_pixel);
 875         info->var.pixclock = 1000000 / getclkMHz(par);
 876         return 0;
 877 }
 878
 879 static int
 880 imsttfb_setcolreg (u_int regno, u_int red, u_int green, u_int blue,
 881                    u_int transp, struct fb_info *info)
 882 {
 883         struct imstt_par *par = info->par;
 884         u_int bpp = info->var.bits_per_pixel;
 885
 886         if (regno > 255)
 887                 return 1;
 888
 889         red >>= 8;
 890         green >>= 8;
 891         blue >>= 8;
 892
 893         /* PADDRW/PDATA are the same as TVPPADDRW/TVPPDATA */
 894         if (0 && bpp == 16)     /* screws up X */
 895                 par->cmap_regs[PADDRW] = regno << 3;
 896         else
 897                 par->cmap_regs[PADDRW] = regno;
 898         eieio();
 899
 900         par->cmap_regs[PDATA] = red;    eieio();
 901         par->cmap_regs[PDATA] = green;  eieio();
 902         par->cmap_regs[PDATA] = blue;   eieio();
 903
 904         if (regno < 16)
 905                 switch (bpp) {
 906                         case 16:
 907                                 par->palette[regno] =
 908                                         (regno << (info->var.green.length ==
 909                                         5 ? 10 : 11)) | (regno << 5) | regno;
 910                                 break;
 911                         case 24:
 912                                 par->palette[regno] =
 913                                         (regno << 16) | (regno << 8) | regno;
 914                                 break;
 915                         case 32: {
 916                                 int i = (regno << 8) | regno;
 917                                 par->palette[regno] = (i << 16) |i;
 918                                 break;
 919                         }
 920                 }
 921         return 0;
 922 }
 923
 924 static int
 925 imsttfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 926 {
 927         if (var->xoffset + info->var.xres > info->var.xres_virtual
 928             || var->yoffset + info->var.yres > info->var.yres_virtual)
 929                 return -EINVAL;
 930
 931         info->var.xoffset = var->xoffset;
 932         info->var.yoffset = var->yoffset;
 933         set_offset(var, info);
 934         return 0;
 935 }
 936
 937 static int
 938 imsttfb_blank(int blank, struct fb_info *info)
 939 {
 940         struct imstt_par *par = info->par;
 941         __u32 ctrl;
 942
 943         ctrl = read_reg_le32(par->dc_regs, STGCTL);
 944         if (blank > 0) {
 945                 switch (blank) {
 946                 case FB_BLANK_NORMAL:
 947                 case FB_BLANK_POWERDOWN:
 948                         ctrl &= ~0x00000380;
 949                         if (par->ramdac == IBM) {
 950                                 par->cmap_regs[PIDXHI] = 0;             eieio();
 951                                 par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 952                                 par->cmap_regs[PIDXDATA] = 0x55;        eieio();
 953                                 par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 954                                 par->cmap_regs[PIDXDATA] = 0x11;        eieio();
 955                                 par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 956                                 par->cmap_regs[PIDXDATA] = 0x0f;        eieio();
 957                                 par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 958                                 par->cmap_regs[PIDXDATA] = 0x1f;        eieio();
 959                                 par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 960                                 par->cmap_regs[PIDXDATA] = 0xc0;
 961                         }
 962                         break;
 963                 case FB_BLANK_VSYNC_SUSPEND:
 964                         ctrl &= ~0x00000020;
 965                         break;
 966                 case FB_BLANK_HSYNC_SUSPEND:
 967                         ctrl &= ~0x00000010;
 968                         break;
 969                 }
 970         } else {
 971                 if (par->ramdac == IBM) {
 972                         ctrl |= 0x000017b0;
 973                         par->cmap_regs[PIDXHI] = 0;             eieio();
 974                         par->cmap_regs[PIDXLO] = CLKCTL;        eieio();
 975                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 976                         par->cmap_regs[PIDXLO] = PWRMNGMT;      eieio();
 977                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 978                         par->cmap_regs[PIDXLO] = SYNCCTL;       eieio();
 979                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
 980                         par->cmap_regs[PIDXLO] = MISCTL1;       eieio();
 981                         par->cmap_regs[PIDXDATA] = 0x01;        eieio();
 982                         par->cmap_regs[PIDXLO] = MISCTL2;       eieio();
 983                         par->cmap_regs[PIDXDATA] = 0x45;        eieio();
 984                 } else
 985                         ctrl |= 0x00001780;
 986         }
 987         write_reg_le32(par->dc_regs, STGCTL, ctrl);
 988         return 0;
 989 }
 990
 991 static void
 992 imsttfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 993 {
 994         struct imstt_par *par = info->par;
 995         __u32 Bpp, line_pitch, bgc, dx, dy, width, height;
 996
 997         bgc = rect->color;
 998         bgc |= (bgc << 8);
 999         bgc |= (bgc << 16);
1000
1001         Bpp = info->var.bits_per_pixel >> 3,
1002         line_pitch = info->fix.line_length;
1003
1004         dy = rect->dy * line_pitch;
1005         dx = rect->dx * Bpp;
1006         height = rect->height;
1007         height--;
1008         width = rect->width * Bpp;
1009         width--;
1010
1011         if (rect->rop == ROP_COPY) {
1012                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1013                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1014                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1015                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1016                 write_reg_le32(par->dc_regs, BI, 0xffffffff);
1017                 write_reg_le32(par->dc_regs, MBC, 0xffffffff);
1018                 write_reg_le32(par->dc_regs, CLR, bgc);
1019                 write_reg_le32(par->dc_regs, BLTCTL, 0x840); /* 0x200000 */
1020                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1021                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1022         } else {
1023                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1024                 write_reg_le32(par->dc_regs, DSA, dy + dx);
1025                 write_reg_le32(par->dc_regs, S1SA, dy + dx);
1026                 write_reg_le32(par->dc_regs, CNT, (height << 16) | width);
1027                 write_reg_le32(par->dc_regs, DP_OCTL, line_pitch);
1028                 write_reg_le32(par->dc_regs, SP, line_pitch);
1029                 write_reg_le32(par->dc_regs, BLTCTL, 0x40005);
1030                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1031                 while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1032         }
1033 }
1034
1035 static void
1036 imsttfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1037 {
1038         struct imstt_par *par = info->par;
1039         __u32 Bpp, line_pitch, fb_offset_old, fb_offset_new, sp, dp_octl;
1040         __u32 cnt, bltctl, sx, sy, dx, dy, height, width;
1041
1042         Bpp = info->var.bits_per_pixel >> 3,
1043
1044         sx = area->sx * Bpp;
1045         sy = area->sy;
1046         dx = area->dx * Bpp;
1047         dy = area->dy;
1048         height = area->height;
1049         height--;
1050         width = area->width * Bpp;
1051         width--;
1052
1053         line_pitch = info->fix.line_length;
1054         bltctl = 0x05;
1055         sp = line_pitch << 16;
1056         cnt = height << 16;
1057
1058         if (sy < dy) {
1059                 sy += height;
1060                 dy += height;
1061                 sp |= -(line_pitch) & 0xffff;
1062                 dp_octl = -(line_pitch) & 0xffff;
1063         } else {
1064                 sp |= line_pitch;
1065                 dp_octl = line_pitch;
1066         }
1067         if (sx < dx) {
1068                 sx += width;
1069                 dx += width;
1070                 bltctl |= 0x80;
1071                 cnt |= -(width) & 0xffff;
1072         } else {
1073                 cnt |= width;
1074         }
1075         fb_offset_old = sy * line_pitch + sx;
1076         fb_offset_new = dy * line_pitch + dx;
1077
1078         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1079         write_reg_le32(par->dc_regs, S1SA, fb_offset_old);
1080         write_reg_le32(par->dc_regs, SP, sp);
1081         write_reg_le32(par->dc_regs, DSA, fb_offset_new);
1082         write_reg_le32(par->dc_regs, CNT, cnt);
1083         write_reg_le32(par->dc_regs, DP_OCTL, dp_octl);
1084         write_reg_le32(par->dc_regs, BLTCTL, bltctl);
1085         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x80);
1086         while(read_reg_le32(par->dc_regs, SSTATUS) & 0x40);
1087 }
1088
1089 #if 0
1090 static int
1091 imsttfb_load_cursor_image(struct imstt_par *par, int width, int height, __u8 fgc)
1092 {
1093         u_int x, y;
1094
1095         if (width > 32 || height > 32)
1096                 return -EINVAL;
1097
1098         if (par->ramdac == IBM) {
1099                 par->cmap_regs[PIDXHI] = 1;     eieio();
1100                 for (x = 0; x < 0x100; x++) {
1101                         par->cmap_regs[PIDXLO] = x;             eieio();
1102                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1103                 }
1104                 par->cmap_regs[PIDXHI] = 1;     eieio();
1105                 for (y = 0; y < height; y++)
1106                         for (x = 0; x < width >> 2; x++) {
1107                                 par->cmap_regs[PIDXLO] = x + y * 8;     eieio();
1108                                 par->cmap_regs[PIDXDATA] = 0xff;        eieio();
1109                         }
1110                 par->cmap_regs[PIDXHI] = 0;             eieio();
1111                 par->cmap_regs[PIDXLO] = CURS1R;        eieio();
1112                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1113                 par->cmap_regs[PIDXLO] = CURS1G;        eieio();
1114                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1115                 par->cmap_regs[PIDXLO] = CURS1B;        eieio();
1116                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1117                 par->cmap_regs[PIDXLO] = CURS2R;        eieio();
1118                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1119                 par->cmap_regs[PIDXLO] = CURS2G;        eieio();
1120                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1121                 par->cmap_regs[PIDXLO] = CURS2B;        eieio();
1122                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1123                 par->cmap_regs[PIDXLO] = CURS3R;        eieio();
1124                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1125                 par->cmap_regs[PIDXLO] = CURS3G;        eieio();
1126                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1127                 par->cmap_regs[PIDXLO] = CURS3B;        eieio();
1128                 par->cmap_regs[PIDXDATA] = fgc;         eieio();
1129         } else {
1130                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1131                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1132                 par->cmap_regs[TVPADDRW] = 0;           eieio();
1133                 for (x = 0; x < 0x200; x++) {
1134                         par->cmap_regs[TVPCRDAT] = 0x00;        eieio();
1135                 }
1136                 for (x = 0; x < 0x200; x++) {
1137                         par->cmap_regs[TVPCRDAT] = 0xff;        eieio();
1138                 }
1139                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1140                 par->cmap_regs[TVPIDATA] &= 0x03;       eieio();
1141                 for (y = 0; y < height; y++)
1142                         for (x = 0; x < width >> 3; x++) {
1143                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1144                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1145                         }
1146                 par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1147                 par->cmap_regs[TVPIDATA] |= 0x08;       eieio();
1148                 for (y = 0; y < height; y++)
1149                         for (x = 0; x < width >> 3; x++) {
1150                                 par->cmap_regs[TVPADDRW] = x + y * 8;   eieio();
1151                                 par->cmap_regs[TVPCRDAT] = 0xff;                eieio();
1152                         }
1153                 par->cmap_regs[TVPCADRW] = 0x00;        eieio();
1154                 for (x = 0; x < 12; x++)
1155                         par->cmap_regs[TVPCDATA] = fgc; eieio();
1156         }
1157         return 1;
1158 }
1159
1160 static void
1161 imstt_set_cursor(struct imstt_par *par, struct fb_image *d, int on)
1162 {
1163         if (par->ramdac == IBM) {
1164                 par->cmap_regs[PIDXHI] = 0;     eieio();
1165                 if (!on) {
1166                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1167                         par->cmap_regs[PIDXDATA] = 0x00;        eieio();
1168                 } else {
1169                         par->cmap_regs[PIDXLO] = CURSXHI;       eieio();
1170                         par->cmap_regs[PIDXDATA] = d->dx >> 8;  eieio();
1171                         par->cmap_regs[PIDXLO] = CURSXLO;       eieio();
1172                         par->cmap_regs[PIDXDATA] = d->dx & 0xff;eieio();
1173                         par->cmap_regs[PIDXLO] = CURSYHI;       eieio();
1174                         par->cmap_regs[PIDXDATA] = d->dy >> 8;  eieio();
1175                         par->cmap_regs[PIDXLO] = CURSYLO;       eieio();
1176                         par->cmap_regs[PIDXDATA] = d->dy & 0xff;eieio();
1177                         par->cmap_regs[PIDXLO] = CURSCTL;       eieio();
1178                         par->cmap_regs[PIDXDATA] = 0x02;        eieio();
1179                 }
1180         } else {
1181                 if (!on) {
1182                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1183                         par->cmap_regs[TVPIDATA] = 0x00;        eieio();
1184                 } else {
1185                         __u16 x = d->dx + 0x40, y = d->dy + 0x40;
1186
1187                         par->cmap_regs[TVPCXPOH] = x >> 8;      eieio();
1188                         par->cmap_regs[TVPCXPOL] = x & 0xff;    eieio();
1189                         par->cmap_regs[TVPCYPOH] = y >> 8;      eieio();
1190                         par->cmap_regs[TVPCYPOL] = y & 0xff;    eieio();
1191                         par->cmap_regs[TVPADDRW] = TVPIRICC;    eieio();
1192                         par->cmap_regs[TVPIDATA] = 0x02;        eieio();
1193                 }
1194         }
1195 }
1196
1197 static int
1198 imsttfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1199 {
1200         struct imstt_par *par = info->par;
1201         u32 flags = cursor->set, fg, bg, xx, yy;
1202
1203         if (cursor->dest == NULL && cursor->rop == ROP_XOR)
1204                 return 1;
1205
1206         imstt_set_cursor(info, cursor, 0);
1207
1208         if (flags & FB_CUR_SETPOS) {
1209                 xx = cursor->image.dx - info->var.xoffset;
1210                 yy = cursor->image.dy - info->var.yoffset;
1211         }
1212
1213         if (flags & FB_CUR_SETSIZE) {
1214         }
1215
1216         if (flags & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP)) {
1217                 int fg_idx = cursor->image.fg_color;
1218                 int width = (cursor->image.width+7)/8;
1219                 u8 *dat = (u8 *) cursor->image.data;
1220                 u8 *dst = (u8 *) cursor->dest;
1221                 u8 *msk = (u8 *) cursor->mask;
1222
1223                 switch (cursor->rop) {
1224                 case ROP_XOR:
1225                         for (i = 0; i < cursor->image.height; i++) {
1226                                 for (j = 0; j < width; j++) {
1227                                         d_idx = i * MAX_CURS/8  + j;
1228                                         data[d_idx] =  byte_rev[dat[s_idx] ^
1229                                                                 dst[s_idx]];
1230                                         mask[d_idx] = byte_rev[msk[s_idx]];
1231                                         s_idx++;
1232                                 }
1233                         }
1234                         break;
1235                 case ROP_COPY:
1236                 default:
1237                         for (i = 0; i < cursor->image.height; i++) {
1238                                 for (j = 0; j < width; j++) {
1239                                         d_idx = i * MAX_CURS/8 + j;
1240                                         data[d_idx] = byte_rev[dat[s_idx]];
1241                                         mask[d_idx] = byte_rev[msk[s_idx]];
1242                                         s_idx++;
1243                                 }
1244                         }
1245                         break;
1246                 }
1247
1248                 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1249                      ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1250                      ((info->cmap.blue[fg_idx] & 0xf8) >> 3) | 1 << 15;
1251
1252                 imsttfb_load_cursor_image(par, xx, yy, fgc);
1253         }
1254         if (cursor->enable)
1255                 imstt_set_cursor(info, cursor, 1);
1256         return 0;
1257 }
1258 #endif
1259
1260 #define FBIMSTT_SETREG          0x545401
1261 #define FBIMSTT_GETREG          0x545402
1262 #define FBIMSTT_SETCMAPREG      0x545403
1263 #define FBIMSTT_GETCMAPREG      0x545404
1264 #define FBIMSTT_SETIDXREG       0x545405
1265 #define FBIMSTT_GETIDXREG       0x545406
1266
1267 static int
1268 imsttfb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
1269 {
1270         struct imstt_par *par = info->par;
1271         void __user *argp = (void __user *)arg;
1272         __u32 reg[2];
1273         __u8 idx[2];
1274
1275         switch (cmd) {
1276                 case FBIMSTT_SETREG:
1277                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1278                                 return -EFAULT;
1279                         write_reg_le32(par->dc_regs, reg[0], reg[1]);
1280                         return 0;
1281                 case FBIMSTT_GETREG:
1282                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1283                                 return -EFAULT;
1284                         reg[1] = read_reg_le32(par->dc_regs, reg[0]);
1285                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1286                                 return -EFAULT;
1287                         return 0;
1288                 case FBIMSTT_SETCMAPREG:
1289                         if (copy_from_user(reg, argp, 8) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1290                                 return -EFAULT;
1291                         write_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0], reg[1]);
1292                         return 0;
1293                 case FBIMSTT_GETCMAPREG:
1294                         if (copy_from_user(reg, argp, 4) || reg[0] > (0x1000 - sizeof(reg[0])) / sizeof(reg[0]))
1295                                 return -EFAULT;
1296                         reg[1] = read_reg_le32(((u_int __iomem *)par->cmap_regs), reg[0]);
1297                         if (copy_to_user((void __user *)(arg + 4), &reg[1], 4))
1298                                 return -EFAULT;
1299                         return 0;
1300                 case FBIMSTT_SETIDXREG:
1301                         if (copy_from_user(idx, argp, 2))
1302                                 return -EFAULT;
1303                         par->cmap_regs[PIDXHI] = 0;             eieio();
1304                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1305                         par->cmap_regs[PIDXDATA] = idx[1];      eieio();
1306                         return 0;
1307                 case FBIMSTT_GETIDXREG:
1308                         if (copy_from_user(idx, argp, 1))
1309                                 return -EFAULT;
1310                         par->cmap_regs[PIDXHI] = 0;             eieio();
1311                         par->cmap_regs[PIDXLO] = idx[0];        eieio();
1312                         idx[1] = par->cmap_regs[PIDXDATA];
1313                         if (copy_to_user((void __user *)(arg + 1), &idx[1], 1))
1314                                 return -EFAULT;
1315                         return 0;
1316                 default:
1317                         return -ENOIOCTLCMD;
1318         }
1319 }
1320
1321 static struct pci_device_id imsttfb_pci_tbl[] = {
1322         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT128,
1323           PCI_ANY_ID, PCI_ANY_ID, 0, 0, IBM },
1324         { PCI_VENDOR_ID_IMS, PCI_DEVICE_ID_IMS_TT3D,
1325           PCI_ANY_ID, PCI_ANY_ID, 0, 0, TVP },
1326         { 0, }
1327 };
1328
1329 MODULE_DEVICE_TABLE(pci, imsttfb_pci_tbl);
1330
1331 static struct pci_driver imsttfb_pci_driver = {
1332         .name =         "imsttfb",
1333         .id_table =     imsttfb_pci_tbl,
1334         .probe =        imsttfb_probe,
1335         .remove =       __devexit_p(imsttfb_remove),
1336 };
1337
1338 static struct fb_ops imsttfb_ops = {
1339         .owner          = THIS_MODULE,
1340         .fb_check_var   = imsttfb_check_var,
1341         .fb_set_par     = imsttfb_set_par,
1342         .fb_setcolreg   = imsttfb_setcolreg,
1343         .fb_pan_display = imsttfb_pan_display,
1344         .fb_blank       = imsttfb_blank,
1345         .fb_fillrect    = imsttfb_fillrect,
1346         .fb_copyarea    = imsttfb_copyarea,
1347         .fb_imageblit   = cfb_imageblit,
1348         .fb_ioctl       = imsttfb_ioctl,
1349 };
1350
1351 static void __devinit
1352 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         printk("fb%u: %s frame buffer; %uMB vram; chip version %u\n",
1465                 info->node, info->fix.id, info->fix.smem_len >> 20, tmp);
1466 }
1467
1468 static int __devinit
1469 imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1470 {
1471         unsigned long addr, size;
1472         struct imstt_par *par;
1473         struct fb_info *info;
1474 #ifdef CONFIG_PPC_OF
1475         struct device_node *dp;
1476
1477         dp = pci_device_to_OF_node(pdev);
1478         if(dp)
1479                 printk(KERN_INFO "%s: OF name %s\n",__FUNCTION__, dp->name);
1480         else
1481                 printk(KERN_ERR "imsttfb: no OF node for pci device\n");
1482 #endif /* CONFIG_PPC_OF */
1483
1484         info = framebuffer_alloc(sizeof(struct imstt_par), &pdev->dev);
1485
1486         if (!info) {
1487                 printk(KERN_ERR "imsttfb: Can't allocate memory\n");
1488                 return -ENOMEM;
1489         }
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 #ifdef CONFIG_PPC_OF
1506                         if (dp && ((strcmp(dp->name, "IMS,tt128mb8") == 0) ||
1507                                    (strcmp(dp->name, "IMS,tt128mb8A") == 0)))
1508                                 par->ramdac = TVP;
1509 #endif /* CONFIG_PPC_OF */
1510                         break;
1511                 case PCI_DEVICE_ID_IMS_TT3D:  /* IMS,tt3d */
1512                         par->ramdac = TVP;
1513                         break;
1514                 default:
1515                         printk(KERN_INFO "imsttfb: Device 0x%x unknown, "
1516                                          "contact maintainer.\n", pdev->device);
1517                         release_mem_region(addr, size);
1518                         framebuffer_release(info);
1519                         return -ENODEV;
1520         }
1521
1522         info->fix.smem_start = addr;
1523         info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ?
1524                                             0x400000 : 0x800000);
1525         info->fix.mmio_start = addr + 0x800000;
1526         par->dc_regs = ioremap(addr + 0x800000, 0x1000);
1527         par->cmap_regs_phys = addr + 0x840000;
1528         par->cmap_regs = (__u8 *)ioremap(addr + 0x840000, 0x1000);
1529         info->pseudo_palette = par->palette;
1530         init_imstt(info);
1531
1532         pci_set_drvdata(pdev, info);
1533         return 0;
1534 }
1535
1536 static void __devexit
1537 imsttfb_remove(struct pci_dev *pdev)
1538 {
1539         struct fb_info *info = pci_get_drvdata(pdev);
1540         struct imstt_par *par = info->par;
1541         int size = pci_resource_len(pdev, 0);
1542
1543         unregister_framebuffer(info);
1544         iounmap(par->cmap_regs);
1545         iounmap(par->dc_regs);
1546         iounmap(info->screen_base);
1547         release_mem_region(info->fix.smem_start, size);
1548         framebuffer_release(info);
1549 }
1550
1551 #ifndef MODULE
1552 static int __init
1553 imsttfb_setup(char *options)
1554 {
1555         char *this_opt;
1556
1557         if (!options || !*options)
1558                 return 0;
1559
1560         while ((this_opt = strsep(&options, ",")) != NULL) {
1561                 if (!strncmp(this_opt, "font:", 5)) {
1562                         char *p;
1563                         int i;
1564
1565                         p = this_opt + 5;
1566                         for (i = 0; i < sizeof(fontname) - 1; i++)
1567                                 if (!*p || *p == ' ' || *p == ',')
1568                                         break;
1569                         memcpy(fontname, this_opt + 5, i);
1570                         fontname[i] = 0;
1571                 } else if (!strncmp(this_opt, "inverse", 7)) {
1572                         inverse = 1;
1573                         fb_invert_cmaps();
1574                 }
1575 #if defined(CONFIG_PPC)
1576                 else if (!strncmp(this_opt, "vmode:", 6)) {
1577                         int vmode = simple_strtoul(this_opt+6, NULL, 0);
1578                         if (vmode > 0 && vmode <= VMODE_MAX)
1579                                 init_vmode = vmode;
1580                 } else if (!strncmp(this_opt, "cmode:", 6)) {
1581                         int cmode = simple_strtoul(this_opt+6, NULL, 0);
1582                         switch (cmode) {
1583                                 case CMODE_8:
1584                                 case 8:
1585                                         init_cmode = CMODE_8;
1586                                         break;
1587                                 case CMODE_16:
1588                                 case 15:
1589                                 case 16:
1590                                         init_cmode = CMODE_16;
1591                                         break;
1592                                 case CMODE_32:
1593                                 case 24:
1594                                 case 32:
1595                                         init_cmode = CMODE_32;
1596                                         break;
1597                         }
1598                 }
1599 #endif
1600         }
1601         return 0;
1602 }
1603
1604 #endif /* MODULE */
1605
1606 static int __init imsttfb_init(void)
1607 {
1608 #ifndef MODULE
1609         char *option = NULL;
1610
1611         if (fb_get_options("imsttfb", &option))
1612                 return -ENODEV;
1613
1614         imsttfb_setup(option);
1615 #endif
1616         return pci_register_driver(&imsttfb_pci_driver);
1617 }
1618
1619 static void __exit imsttfb_exit(void)
1620 {
1621         pci_unregister_driver(&imsttfb_pci_driver);
1622 }
1623
1624 MODULE_LICENSE("GPL");
1625
1626 module_init(imsttfb_init);
1627 module_exit(imsttfb_exit);
1628