git.oblomov.eu Git - linux-2.6/blob - drivers/video/cyber2000fb.c

   1 /*
   2  *  linux/drivers/video/cyber2000fb.c
   3  *
   4  *  Copyright (C) 1998-2002 Russell King
   5  *
   6  *  MIPS and 50xx clock support
   7  *  Copyright (C) 2001 Bradley D. LaRonde <brad@ltc.com>
   8  *
   9  *  32 bit support, text color and panning fixes for modes != 8 bit
  10  *  Copyright (C) 2002 Denis Oliver Kropp <dok@directfb.org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  *
  16  * Integraphics CyberPro 2000, 2010 and 5000 frame buffer device
  17  *
  18  * Based on cyberfb.c.
  19  *
  20  * Note that we now use the new fbcon fix, var and cmap scheme.  We do
  21  * still have to check which console is the currently displayed one
  22  * however, especially for the colourmap stuff.
  23  *
  24  * We also use the new hotplug PCI subsystem.  I'm not sure if there
  25  * are any such cards, but I'm erring on the side of caution.  We don't
  26  * want to go pop just because someone does have one.
  27  *
  28  * Note that this doesn't work fully in the case of multiple CyberPro
  29  * cards with grabbers.  We currently can only attach to the first
  30  * CyberPro card found.
  31  *
  32  * When we're in truecolour mode, we power down the LUT RAM as a power
  33  * saving feature.  Also, when we enter any of the powersaving modes
  34  * (except soft blanking) we power down the RAMDACs.  This saves about
  35  * 1W, which is roughly 8% of the power consumption of a NetWinder
  36  * (which, incidentally, is about the same saving as a 2.5in hard disk
  37  * entering standby mode.)
  38  */
  39 #include <linux/module.h>
  40 #include <linux/kernel.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/mm.h>
  44 #include <linux/slab.h>
  45 #include <linux/delay.h>
  46 #include <linux/fb.h>
  47 #include <linux/pci.h>
  48 #include <linux/init.h>
  49
  50 #include <asm/io.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/system.h>
  53 #include <asm/uaccess.h>
  54
  55 #ifdef __arm__
  56 #include <asm/mach-types.h>
  57 #endif
  58
  59 #include "cyber2000fb.h"
  60
  61 struct cfb_info {
  62         struct fb_info          fb;
  63         struct display_switch   *dispsw;
  64         struct display          *display;
  65         struct pci_dev          *dev;
  66         unsigned char           __iomem *region;
  67         unsigned char           __iomem *regs;
  68         u_int                   id;
  69         int                     func_use_count;
  70         u_long                  ref_ps;
  71
  72         /*
  73          * Clock divisors
  74          */
  75         u_int                   divisors[4];
  76
  77         struct {
  78                 u8 red, green, blue;
  79         } palette[NR_PALETTE];
  80
  81         u_char                  mem_ctl1;
  82         u_char                  mem_ctl2;
  83         u_char                  mclk_mult;
  84         u_char                  mclk_div;
  85         /*
  86          * RAMDAC control register is both of these or'ed together
  87          */
  88         u_char                  ramdac_ctrl;
  89         u_char                  ramdac_powerdown;
  90
  91         u32                     pseudo_palette[16];
  92 };
  93
  94 static char *default_font = "Acorn8x8";
  95 module_param(default_font, charp, 0);
  96 MODULE_PARM_DESC(default_font, "Default font name");
  97
  98 /*
  99  * Our access methods.
 100  */
 101 #define cyber2000fb_writel(val,reg,cfb) writel(val, (cfb)->regs + (reg))
 102 #define cyber2000fb_writew(val,reg,cfb) writew(val, (cfb)->regs + (reg))
 103 #define cyber2000fb_writeb(val,reg,cfb) writeb(val, (cfb)->regs + (reg))
 104
 105 #define cyber2000fb_readb(reg,cfb)      readb((cfb)->regs + (reg))
 106
 107 static inline void
 108 cyber2000_crtcw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
 109 {
 110         cyber2000fb_writew((reg & 255) | val << 8, 0x3d4, cfb);
 111 }
 112
 113 static inline void
 114 cyber2000_grphw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
 115 {
 116         cyber2000fb_writew((reg & 255) | val << 8, 0x3ce, cfb);
 117 }
 118
 119 static inline unsigned int
 120 cyber2000_grphr(unsigned int reg, struct cfb_info *cfb)
 121 {
 122         cyber2000fb_writeb(reg, 0x3ce, cfb);
 123         return cyber2000fb_readb(0x3cf, cfb);
 124 }
 125
 126 static inline void
 127 cyber2000_attrw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
 128 {
 129         cyber2000fb_readb(0x3da, cfb);
 130         cyber2000fb_writeb(reg, 0x3c0, cfb);
 131         cyber2000fb_readb(0x3c1, cfb);
 132         cyber2000fb_writeb(val, 0x3c0, cfb);
 133 }
 134
 135 static inline void
 136 cyber2000_seqw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
 137 {
 138         cyber2000fb_writew((reg & 255) | val << 8, 0x3c4, cfb);
 139 }
 140
 141 /* -------------------- Hardware specific routines ------------------------- */
 142
 143 /*
 144  * Hardware Cyber2000 Acceleration
 145  */
 146 static void
 147 cyber2000fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 148 {
 149         struct cfb_info *cfb = (struct cfb_info *)info;
 150         unsigned long dst, col;
 151
 152         if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
 153                 cfb_fillrect(info, rect);
 154                 return;
 155         }
 156
 157         cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
 158         cyber2000fb_writew(rect->width - 1, CO_REG_PIXWIDTH, cfb);
 159         cyber2000fb_writew(rect->height - 1, CO_REG_PIXHEIGHT, cfb);
 160
 161         col = rect->color;
 162         if (cfb->fb.var.bits_per_pixel > 8)
 163                 col = ((u32 *)cfb->fb.pseudo_palette)[col];
 164         cyber2000fb_writel(col, CO_REG_FGCOLOUR, cfb);
 165
 166         dst = rect->dx + rect->dy * cfb->fb.var.xres_virtual;
 167         if (cfb->fb.var.bits_per_pixel == 24) {
 168                 cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
 169                 dst *= 3;
 170         }
 171
 172         cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
 173         cyber2000fb_writeb(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
 174         cyber2000fb_writew(CO_CMD_L_PATTERN_FGCOL, CO_REG_CMD_L, cfb);
 175         cyber2000fb_writew(CO_CMD_H_BLITTER, CO_REG_CMD_H, cfb);
 176 }
 177
 178 static void
 179 cyber2000fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
 180 {
 181         struct cfb_info *cfb = (struct cfb_info *)info;
 182         unsigned int cmd = CO_CMD_L_PATTERN_FGCOL;
 183         unsigned long src, dst;
 184
 185         if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
 186                 cfb_copyarea(info, region);
 187                 return;
 188         }
 189
 190         cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
 191         cyber2000fb_writew(region->width - 1, CO_REG_PIXWIDTH, cfb);
 192         cyber2000fb_writew(region->height - 1, CO_REG_PIXHEIGHT, cfb);
 193
 194         src = region->sx + region->sy * cfb->fb.var.xres_virtual;
 195         dst = region->dx + region->dy * cfb->fb.var.xres_virtual;
 196
 197         if (region->sx < region->dx) {
 198                 src += region->width - 1;
 199                 dst += region->width - 1;
 200                 cmd |= CO_CMD_L_INC_LEFT;
 201         }
 202
 203         if (region->sy < region->dy) {
 204                 src += (region->height - 1) * cfb->fb.var.xres_virtual;
 205                 dst += (region->height - 1) * cfb->fb.var.xres_virtual;
 206                 cmd |= CO_CMD_L_INC_UP;
 207         }
 208
 209         if (cfb->fb.var.bits_per_pixel == 24) {
 210                 cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
 211                 src *= 3;
 212                 dst *= 3;
 213         }
 214         cyber2000fb_writel(src, CO_REG_SRC1_PTR, cfb);
 215         cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
 216         cyber2000fb_writew(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
 217         cyber2000fb_writew(cmd, CO_REG_CMD_L, cfb);
 218         cyber2000fb_writew(CO_CMD_H_FGSRCMAP | CO_CMD_H_BLITTER,
 219                            CO_REG_CMD_H, cfb);
 220 }
 221
 222 static void
 223 cyber2000fb_imageblit(struct fb_info *info, const struct fb_image *image)
 224 {
 225 //      struct cfb_info *cfb = (struct cfb_info *)info;
 226
 227 //      if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
 228                 cfb_imageblit(info, image);
 229                 return;
 230 //      }
 231 }
 232
 233 static int cyber2000fb_sync(struct fb_info *info)
 234 {
 235         struct cfb_info *cfb = (struct cfb_info *)info;
 236         int count = 100000;
 237
 238         if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT))
 239                 return 0;
 240
 241         while (cyber2000fb_readb(CO_REG_CONTROL, cfb) & CO_CTRL_BUSY) {
 242                 if (!count--) {
 243                         debug_printf("accel_wait timed out\n");
 244                         cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
 245                         break;
 246                 }
 247                 udelay(1);
 248         }
 249         return 0;
 250 }
 251
 252 /*
 253  * ===========================================================================
 254  */
 255
 256 static inline u32 convert_bitfield(u_int val, struct fb_bitfield *bf)
 257 {
 258         u_int mask = (1 << bf->length) - 1;
 259
 260         return (val >> (16 - bf->length) & mask) << bf->offset;
 261 }
 262
 263 /*
 264  *    Set a single color register. Return != 0 for invalid regno.
 265  */
 266 static int
 267 cyber2000fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 268                       u_int transp, struct fb_info *info)
 269 {
 270         struct cfb_info *cfb = (struct cfb_info *)info;
 271         struct fb_var_screeninfo *var = &cfb->fb.var;
 272         u32 pseudo_val;
 273         int ret = 1;
 274
 275         switch (cfb->fb.fix.visual) {
 276         default:
 277                 return 1;
 278
 279         /*
 280          * Pseudocolour:
 281          *         8     8
 282          * pixel --/--+--/-->  red lut  --> red dac
 283          *            |  8
 284          *            +--/--> green lut --> green dac
 285          *            |  8
 286          *            +--/-->  blue lut --> blue dac
 287          */
 288         case FB_VISUAL_PSEUDOCOLOR:
 289                 if (regno >= NR_PALETTE)
 290                         return 1;
 291
 292                 red >>= 8;
 293                 green >>= 8;
 294                 blue >>= 8;
 295
 296                 cfb->palette[regno].red   = red;
 297                 cfb->palette[regno].green = green;
 298                 cfb->palette[regno].blue  = blue;
 299
 300                 cyber2000fb_writeb(regno, 0x3c8, cfb);
 301                 cyber2000fb_writeb(red, 0x3c9, cfb);
 302                 cyber2000fb_writeb(green, 0x3c9, cfb);
 303                 cyber2000fb_writeb(blue, 0x3c9, cfb);
 304                 return 0;
 305
 306         /*
 307          * Direct colour:
 308          *          n     rl
 309          *  pixel --/--+--/-->  red lut  --> red dac
 310          *             |  gl
 311          *             +--/--> green lut --> green dac
 312          *             |  bl
 313          *             +--/-->  blue lut --> blue dac
 314          * n = bpp, rl = red length, gl = green length, bl = blue length
 315          */
 316         case FB_VISUAL_DIRECTCOLOR:
 317                 red >>= 8;
 318                 green >>= 8;
 319                 blue >>= 8;
 320
 321                 if (var->green.length == 6 && regno < 64) {
 322                         cfb->palette[regno << 2].green = green;
 323
 324                         /*
 325                          * The 6 bits of the green component are applied
 326                          * to the high 6 bits of the LUT.
 327                          */
 328                         cyber2000fb_writeb(regno << 2, 0x3c8, cfb);
 329                         cyber2000fb_writeb(cfb->palette[regno >> 1].red, 0x3c9, cfb);
 330                         cyber2000fb_writeb(green, 0x3c9, cfb);
 331                         cyber2000fb_writeb(cfb->palette[regno >> 1].blue, 0x3c9, cfb);
 332
 333                         green = cfb->palette[regno << 3].green;
 334
 335                         ret = 0;
 336                 }
 337
 338                 if (var->green.length >= 5 && regno < 32) {
 339                         cfb->palette[regno << 3].red   = red;
 340                         cfb->palette[regno << 3].green = green;
 341                         cfb->palette[regno << 3].blue  = blue;
 342
 343                         /*
 344                          * The 5 bits of each colour component are
 345                          * applied to the high 5 bits of the LUT.
 346                          */
 347                         cyber2000fb_writeb(regno << 3, 0x3c8, cfb);
 348                         cyber2000fb_writeb(red, 0x3c9, cfb);
 349                         cyber2000fb_writeb(green, 0x3c9, cfb);
 350                         cyber2000fb_writeb(blue, 0x3c9, cfb);
 351                         ret = 0;
 352                 }
 353
 354                 if (var->green.length == 4 && regno < 16) {
 355                         cfb->palette[regno << 4].red   = red;
 356                         cfb->palette[regno << 4].green = green;
 357                         cfb->palette[regno << 4].blue  = blue;
 358
 359                         /*
 360                          * The 5 bits of each colour component are
 361                          * applied to the high 5 bits of the LUT.
 362                          */
 363                         cyber2000fb_writeb(regno << 4, 0x3c8, cfb);
 364                         cyber2000fb_writeb(red, 0x3c9, cfb);
 365                         cyber2000fb_writeb(green, 0x3c9, cfb);
 366                         cyber2000fb_writeb(blue, 0x3c9, cfb);
 367                         ret = 0;
 368                 }
 369
 370                 /*
 371                  * Since this is only used for the first 16 colours, we
 372                  * don't have to care about overflowing for regno >= 32
 373                  */
 374                 pseudo_val = regno << var->red.offset |
 375                              regno << var->green.offset |
 376                              regno << var->blue.offset;
 377                 break;
 378
 379         /*
 380          * True colour:
 381          *          n     rl
 382          *  pixel --/--+--/--> red dac
 383          *             |  gl
 384          *             +--/--> green dac
 385          *             |  bl
 386          *             +--/--> blue dac
 387          * n = bpp, rl = red length, gl = green length, bl = blue length
 388          */
 389         case FB_VISUAL_TRUECOLOR:
 390                 pseudo_val = convert_bitfield(transp ^ 0xffff, &var->transp);
 391                 pseudo_val |= convert_bitfield(red, &var->red);
 392                 pseudo_val |= convert_bitfield(green, &var->green);
 393                 pseudo_val |= convert_bitfield(blue, &var->blue);
 394                 break;
 395         }
 396
 397         /*
 398          * Now set our pseudo palette for the CFB16/24/32 drivers.
 399          */
 400         if (regno < 16)
 401                 ((u32 *)cfb->fb.pseudo_palette)[regno] = pseudo_val;
 402
 403         return ret;
 404 }
 405
 406 struct par_info {
 407         /*
 408          * Hardware
 409          */
 410         u_char  clock_mult;
 411         u_char  clock_div;
 412         u_char  extseqmisc;
 413         u_char  co_pixfmt;
 414         u_char  crtc_ofl;
 415         u_char  crtc[19];
 416         u_int   width;
 417         u_int   pitch;
 418         u_int   fetch;
 419
 420         /*
 421          * Other
 422          */
 423         u_char  ramdac;
 424 };
 425
 426 static const u_char crtc_idx[] = {
 427         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
 428         0x08, 0x09,
 429         0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18
 430 };
 431
 432 static void cyber2000fb_write_ramdac_ctrl(struct cfb_info *cfb)
 433 {
 434         unsigned int i;
 435         unsigned int val = cfb->ramdac_ctrl | cfb->ramdac_powerdown;
 436
 437         cyber2000fb_writeb(0x56, 0x3ce, cfb);
 438         i = cyber2000fb_readb(0x3cf, cfb);
 439         cyber2000fb_writeb(i | 4, 0x3cf, cfb);
 440         cyber2000fb_writeb(val, 0x3c6, cfb);
 441         cyber2000fb_writeb(i, 0x3cf, cfb);
 442 }
 443
 444 static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
 445 {
 446         u_int i;
 447
 448         /*
 449          * Blank palette
 450          */
 451         for (i = 0; i < NR_PALETTE; i++) {
 452                 cyber2000fb_writeb(i, 0x3c8, cfb);
 453                 cyber2000fb_writeb(0, 0x3c9, cfb);
 454                 cyber2000fb_writeb(0, 0x3c9, cfb);
 455                 cyber2000fb_writeb(0, 0x3c9, cfb);
 456         }
 457
 458         cyber2000fb_writeb(0xef, 0x3c2, cfb);
 459         cyber2000_crtcw(0x11, 0x0b, cfb);
 460         cyber2000_attrw(0x11, 0x00, cfb);
 461
 462         cyber2000_seqw(0x00, 0x01, cfb);
 463         cyber2000_seqw(0x01, 0x01, cfb);
 464         cyber2000_seqw(0x02, 0x0f, cfb);
 465         cyber2000_seqw(0x03, 0x00, cfb);
 466         cyber2000_seqw(0x04, 0x0e, cfb);
 467         cyber2000_seqw(0x00, 0x03, cfb);
 468
 469         for (i = 0; i < sizeof(crtc_idx); i++)
 470                 cyber2000_crtcw(crtc_idx[i], hw->crtc[i], cfb);
 471
 472         for (i = 0x0a; i < 0x10; i++)
 473                 cyber2000_crtcw(i, 0, cfb);
 474
 475         cyber2000_grphw(EXT_CRT_VRTOFL, hw->crtc_ofl, cfb);
 476         cyber2000_grphw(0x00, 0x00, cfb);
 477         cyber2000_grphw(0x01, 0x00, cfb);
 478         cyber2000_grphw(0x02, 0x00, cfb);
 479         cyber2000_grphw(0x03, 0x00, cfb);
 480         cyber2000_grphw(0x04, 0x00, cfb);
 481         cyber2000_grphw(0x05, 0x60, cfb);
 482         cyber2000_grphw(0x06, 0x05, cfb);
 483         cyber2000_grphw(0x07, 0x0f, cfb);
 484         cyber2000_grphw(0x08, 0xff, cfb);
 485
 486         /* Attribute controller registers */
 487         for (i = 0; i < 16; i++)
 488                 cyber2000_attrw(i, i, cfb);
 489
 490         cyber2000_attrw(0x10, 0x01, cfb);
 491         cyber2000_attrw(0x11, 0x00, cfb);
 492         cyber2000_attrw(0x12, 0x0f, cfb);
 493         cyber2000_attrw(0x13, 0x00, cfb);
 494         cyber2000_attrw(0x14, 0x00, cfb);
 495
 496         /* PLL registers */
 497         cyber2000_grphw(EXT_DCLK_MULT, hw->clock_mult, cfb);
 498         cyber2000_grphw(EXT_DCLK_DIV,  hw->clock_div, cfb);
 499         cyber2000_grphw(EXT_MCLK_MULT, cfb->mclk_mult, cfb);
 500         cyber2000_grphw(EXT_MCLK_DIV,  cfb->mclk_div, cfb);
 501         cyber2000_grphw(0x90, 0x01, cfb);
 502         cyber2000_grphw(0xb9, 0x80, cfb);
 503         cyber2000_grphw(0xb9, 0x00, cfb);
 504
 505         cfb->ramdac_ctrl = hw->ramdac;
 506         cyber2000fb_write_ramdac_ctrl(cfb);
 507
 508         cyber2000fb_writeb(0x20, 0x3c0, cfb);
 509         cyber2000fb_writeb(0xff, 0x3c6, cfb);
 510
 511         cyber2000_grphw(0x14, hw->fetch, cfb);
 512         cyber2000_grphw(0x15, ((hw->fetch >> 8) & 0x03) |
 513                               ((hw->pitch >> 4) & 0x30), cfb);
 514         cyber2000_grphw(EXT_SEQ_MISC, hw->extseqmisc, cfb);
 515
 516         /*
 517          * Set up accelerator registers
 518          */
 519         cyber2000fb_writew(hw->width,     CO_REG_SRC_WIDTH,  cfb);
 520         cyber2000fb_writew(hw->width,     CO_REG_DEST_WIDTH, cfb);
 521         cyber2000fb_writeb(hw->co_pixfmt, CO_REG_PIXFMT, cfb);
 522 }
 523
 524 static inline int
 525 cyber2000fb_update_start(struct cfb_info *cfb, struct fb_var_screeninfo *var)
 526 {
 527         u_int base = var->yoffset * var->xres_virtual + var->xoffset;
 528
 529         base *= var->bits_per_pixel;
 530
 531         /*
 532          * Convert to bytes and shift two extra bits because DAC
 533          * can only start on 4 byte aligned data.
 534          */
 535         base >>= 5;
 536
 537         if (base >= 1 << 20)
 538                 return -EINVAL;
 539
 540         cyber2000_grphw(0x10, base >> 16 | 0x10, cfb);
 541         cyber2000_crtcw(0x0c, base >> 8, cfb);
 542         cyber2000_crtcw(0x0d, base, cfb);
 543
 544         return 0;
 545 }
 546
 547 static int
 548 cyber2000fb_decode_crtc(struct par_info *hw, struct cfb_info *cfb,
 549                         struct fb_var_screeninfo *var)
 550 {
 551         u_int Htotal, Hblankend, Hsyncend;
 552         u_int Vtotal, Vdispend, Vblankstart, Vblankend, Vsyncstart, Vsyncend;
 553 #define BIT(v,b1,m,b2) (((v >> b1) & m) << b2)
 554
 555         hw->crtc[13] = hw->pitch;
 556         hw->crtc[17] = 0xe3;
 557         hw->crtc[14] = 0;
 558         hw->crtc[8]  = 0;
 559
 560         Htotal      = var->xres + var->right_margin +
 561                       var->hsync_len + var->left_margin;
 562
 563         if (Htotal > 2080)
 564                 return -EINVAL;
 565
 566         hw->crtc[0] = (Htotal >> 3) - 5;
 567         hw->crtc[1] = (var->xres >> 3) - 1;
 568         hw->crtc[2] = var->xres >> 3;
 569         hw->crtc[4] = (var->xres + var->right_margin) >> 3;
 570
 571         Hblankend   = (Htotal - 4*8) >> 3;
 572
 573         hw->crtc[3] = BIT(Hblankend,  0, 0x1f,  0) |
 574                       BIT(1,          0, 0x01,  7);
 575
 576         Hsyncend    = (var->xres + var->right_margin + var->hsync_len) >> 3;
 577
 578         hw->crtc[5] = BIT(Hsyncend,   0, 0x1f,  0) |
 579                       BIT(Hblankend,  5, 0x01,  7);
 580
 581         Vdispend    = var->yres - 1;
 582         Vsyncstart  = var->yres + var->lower_margin;
 583         Vsyncend    = var->yres + var->lower_margin + var->vsync_len;
 584         Vtotal      = var->yres + var->lower_margin + var->vsync_len +
 585                       var->upper_margin - 2;
 586
 587         if (Vtotal > 2047)
 588                 return -EINVAL;
 589
 590         Vblankstart = var->yres + 6;
 591         Vblankend   = Vtotal - 10;
 592
 593         hw->crtc[6]  = Vtotal;
 594         hw->crtc[7]  = BIT(Vtotal,     8, 0x01,  0) |
 595                         BIT(Vdispend,   8, 0x01,  1) |
 596                         BIT(Vsyncstart, 8, 0x01,  2) |
 597                         BIT(Vblankstart,8, 0x01,  3) |
 598                         BIT(1,          0, 0x01,  4) |
 599                         BIT(Vtotal,     9, 0x01,  5) |
 600                         BIT(Vdispend,   9, 0x01,  6) |
 601                         BIT(Vsyncstart, 9, 0x01,  7);
 602         hw->crtc[9]  = BIT(0,          0, 0x1f,  0) |
 603                         BIT(Vblankstart,9, 0x01,  5) |
 604                         BIT(1,          0, 0x01,  6);
 605         hw->crtc[10] = Vsyncstart;
 606         hw->crtc[11] = BIT(Vsyncend,   0, 0x0f,  0) |
 607                        BIT(1,          0, 0x01,  7);
 608         hw->crtc[12] = Vdispend;
 609         hw->crtc[15] = Vblankstart;
 610         hw->crtc[16] = Vblankend;
 611         hw->crtc[18] = 0xff;
 612
 613         /*
 614          * overflow - graphics reg 0x11
 615          * 0=VTOTAL:10 1=VDEND:10 2=VRSTART:10 3=VBSTART:10
 616          * 4=LINECOMP:10 5-IVIDEO 6=FIXCNT
 617          */
 618         hw->crtc_ofl =
 619                 BIT(Vtotal,     10, 0x01,  0) |
 620                 BIT(Vdispend,   10, 0x01,  1) |
 621                 BIT(Vsyncstart, 10, 0x01,  2) |
 622                 BIT(Vblankstart,10, 0x01,  3) |
 623                 EXT_CRT_VRTOFL_LINECOMP10;
 624
 625         /* woody: set the interlaced bit... */
 626         /* FIXME: what about doublescan? */
 627         if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED)
 628                 hw->crtc_ofl |= EXT_CRT_VRTOFL_INTERLACE;
 629
 630         return 0;
 631 }
 632
 633 /*
 634  * The following was discovered by a good monitor, bit twiddling, theorising
 635  * and but mostly luck.  Strangely, it looks like everyone elses' PLL!
 636  *
 637  * Clock registers:
 638  *   fclock = fpll / div2
 639  *   fpll   = fref * mult / div1
 640  * where:
 641  *   fref = 14.318MHz (69842ps)
 642  *   mult = reg0xb0.7:0
 643  *   div1 = (reg0xb1.5:0 + 1)
 644  *   div2 =  2^(reg0xb1.7:6)
 645  *   fpll should be between 115 and 260 MHz
 646  *  (8696ps and 3846ps)
 647  */
 648 static int
 649 cyber2000fb_decode_clock(struct par_info *hw, struct cfb_info *cfb,
 650                          struct fb_var_screeninfo *var)
 651 {
 652         u_long pll_ps = var->pixclock;
 653         const u_long ref_ps = cfb->ref_ps;
 654         u_int div2, t_div1, best_div1, best_mult;
 655         int best_diff;
 656         int vco;
 657
 658         /*
 659          * Step 1:
 660          *   find div2 such that 115MHz < fpll < 260MHz
 661          *   and 0 <= div2 < 4
 662          */
 663         for (div2 = 0; div2 < 4; div2++) {
 664                 u_long new_pll;
 665
 666                 new_pll = pll_ps / cfb->divisors[div2];
 667                 if (8696 > new_pll && new_pll > 3846) {
 668                         pll_ps = new_pll;
 669                         break;
 670                 }
 671         }
 672
 673         if (div2 == 4)
 674                 return -EINVAL;
 675
 676         /*
 677          * Step 2:
 678          *  Given pll_ps and ref_ps, find:
 679          *    pll_ps * 0.995 < pll_ps_calc < pll_ps * 1.005
 680          *  where { 1 < best_div1 < 32, 1 < best_mult < 256 }
 681          *    pll_ps_calc = best_div1 / (ref_ps * best_mult)
 682          */
 683         best_diff = 0x7fffffff;
 684         best_mult = 32;
 685         best_div1 = 255;
 686         for (t_div1 = 32; t_div1 > 1; t_div1 -= 1) {
 687                 u_int rr, t_mult, t_pll_ps;
 688                 int diff;
 689
 690                 /*
 691                  * Find the multiplier for this divisor
 692                  */
 693                 rr = ref_ps * t_div1;
 694                 t_mult = (rr + pll_ps / 2) / pll_ps;
 695
 696                 /*
 697                  * Is the multiplier within the correct range?
 698                  */
 699                 if (t_mult > 256 || t_mult < 2)
 700                         continue;
 701
 702                 /*
 703                  * Calculate the actual clock period from this multiplier
 704                  * and divisor, and estimate the error.
 705                  */
 706                 t_pll_ps = (rr + t_mult / 2) / t_mult;
 707                 diff = pll_ps - t_pll_ps;
 708                 if (diff < 0)
 709                         diff = -diff;
 710
 711                 if (diff < best_diff) {
 712                         best_diff = diff;
 713                         best_mult = t_mult;
 714                         best_div1 = t_div1;
 715                 }
 716
 717                 /*
 718                  * If we hit an exact value, there is no point in continuing.
 719                  */
 720                 if (diff == 0)
 721                         break;
 722         }
 723
 724         /*
 725          * Step 3:
 726          *  combine values
 727          */
 728         hw->clock_mult = best_mult - 1;
 729         hw->clock_div  = div2 << 6 | (best_div1 - 1);
 730
 731         vco = ref_ps * best_div1 / best_mult;
 732         if ((ref_ps == 40690) && (vco < 5556))
 733                 /* Set VFSEL when VCO > 180MHz (5.556 ps). */
 734                 hw->clock_div |= EXT_DCLK_DIV_VFSEL;
 735
 736         return 0;
 737 }
 738
 739 /*
 740  *    Set the User Defined Part of the Display
 741  */
 742 static int
 743 cyber2000fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 744 {
 745         struct cfb_info *cfb = (struct cfb_info *)info;
 746         struct par_info hw;
 747         unsigned int mem;
 748         int err;
 749
 750         var->transp.msb_right   = 0;
 751         var->red.msb_right      = 0;
 752         var->green.msb_right    = 0;
 753         var->blue.msb_right     = 0;
 754
 755         switch (var->bits_per_pixel) {
 756         case 8: /* PSEUDOCOLOUR, 256 */
 757                 var->transp.offset      = 0;
 758                 var->transp.length      = 0;
 759                 var->red.offset         = 0;
 760                 var->red.length         = 8;
 761                 var->green.offset       = 0;
 762                 var->green.length       = 8;
 763                 var->blue.offset        = 0;
 764                 var->blue.length        = 8;
 765                 break;
 766
 767         case 16:/* DIRECTCOLOUR, 64k or 32k */
 768                 switch (var->green.length) {
 769                 case 6: /* RGB565, 64k */
 770                         var->transp.offset      = 0;
 771                         var->transp.length      = 0;
 772                         var->red.offset         = 11;
 773                         var->red.length         = 5;
 774                         var->green.offset       = 5;
 775                         var->green.length       = 6;
 776                         var->blue.offset        = 0;
 777                         var->blue.length        = 5;
 778                         break;
 779
 780                 default:
 781                 case 5: /* RGB555, 32k */
 782                         var->transp.offset      = 0;
 783                         var->transp.length      = 0;
 784                         var->red.offset         = 10;
 785                         var->red.length         = 5;
 786                         var->green.offset       = 5;
 787                         var->green.length       = 5;
 788                         var->blue.offset        = 0;
 789                         var->blue.length        = 5;
 790                         break;
 791
 792                 case 4: /* RGB444, 4k + transparency? */
 793                         var->transp.offset      = 12;
 794                         var->transp.length      = 4;
 795                         var->red.offset         = 8;
 796                         var->red.length         = 4;
 797                         var->green.offset       = 4;
 798                         var->green.length       = 4;
 799                         var->blue.offset        = 0;
 800                         var->blue.length        = 4;
 801                         break;
 802                 }
 803                 break;
 804
 805         case 24:/* TRUECOLOUR, 16m */
 806                 var->transp.offset      = 0;
 807                 var->transp.length      = 0;
 808                 var->red.offset         = 16;
 809                 var->red.length         = 8;
 810                 var->green.offset       = 8;
 811                 var->green.length       = 8;
 812                 var->blue.offset        = 0;
 813                 var->blue.length        = 8;
 814                 break;
 815
 816         case 32:/* TRUECOLOUR, 16m */
 817                 var->transp.offset      = 24;
 818                 var->transp.length      = 8;
 819                 var->red.offset         = 16;
 820                 var->red.length         = 8;
 821                 var->green.offset       = 8;
 822                 var->green.length       = 8;
 823                 var->blue.offset        = 0;
 824                 var->blue.length        = 8;
 825                 break;
 826
 827         default:
 828                 return -EINVAL;
 829         }
 830
 831         mem = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel / 8);
 832         if (mem > cfb->fb.fix.smem_len)
 833                 var->yres_virtual = cfb->fb.fix.smem_len * 8 /
 834                         (var->bits_per_pixel * var->xres_virtual);
 835
 836         if (var->yres > var->yres_virtual)
 837                 var->yres = var->yres_virtual;
 838         if (var->xres > var->xres_virtual)
 839                 var->xres = var->xres_virtual;
 840
 841         err = cyber2000fb_decode_clock(&hw, cfb, var);
 842         if (err)
 843                 return err;
 844
 845         err = cyber2000fb_decode_crtc(&hw, cfb, var);
 846         if (err)
 847                 return err;
 848
 849         return 0;
 850 }
 851
 852 static int cyber2000fb_set_par(struct fb_info *info)
 853 {
 854         struct cfb_info *cfb = (struct cfb_info *)info;
 855         struct fb_var_screeninfo *var = &cfb->fb.var;
 856         struct par_info hw;
 857         unsigned int mem;
 858
 859         hw.width = var->xres_virtual;
 860         hw.ramdac = RAMDAC_VREFEN | RAMDAC_DAC8BIT;
 861
 862         switch (var->bits_per_pixel) {
 863         case 8:
 864                 hw.co_pixfmt            = CO_PIXFMT_8BPP;
 865                 hw.pitch                = hw.width >> 3;
 866                 hw.extseqmisc           = EXT_SEQ_MISC_8;
 867                 break;
 868
 869         case 16:
 870                 hw.co_pixfmt            = CO_PIXFMT_16BPP;
 871                 hw.pitch                = hw.width >> 2;
 872
 873                 switch (var->green.length) {
 874                 case 6: /* RGB565, 64k */
 875                         hw.extseqmisc   = EXT_SEQ_MISC_16_RGB565;
 876                         break;
 877                 case 5: /* RGB555, 32k */
 878                         hw.extseqmisc   = EXT_SEQ_MISC_16_RGB555;
 879                         break;
 880                 case 4: /* RGB444, 4k + transparency? */
 881                         hw.extseqmisc   = EXT_SEQ_MISC_16_RGB444;
 882                         break;
 883                 default:
 884                         BUG();
 885                 }
 886         case 24:/* TRUECOLOUR, 16m */
 887                 hw.co_pixfmt            = CO_PIXFMT_24BPP;
 888                 hw.width                *= 3;
 889                 hw.pitch                = hw.width >> 3;
 890                 hw.ramdac               |= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
 891                 hw.extseqmisc           = EXT_SEQ_MISC_24_RGB888;
 892                 break;
 893
 894         case 32:/* TRUECOLOUR, 16m */
 895                 hw.co_pixfmt            = CO_PIXFMT_32BPP;
 896                 hw.pitch                = hw.width >> 1;
 897                 hw.ramdac               |= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
 898                 hw.extseqmisc           = EXT_SEQ_MISC_32;
 899                 break;
 900
 901         default:
 902                 BUG();
 903         }
 904
 905         /*
 906          * Sigh, this is absolutely disgusting, but caused by
 907          * the way the fbcon developers want to separate out
 908          * the "checking" and the "setting" of the video mode.
 909          *
 910          * If the mode is not suitable for the hardware here,
 911          * we can't prevent it being set by returning an error.
 912          *
 913          * In theory, since NetWinders contain just one VGA card,
 914          * we should never end up hitting this problem.
 915          */
 916         BUG_ON(cyber2000fb_decode_clock(&hw, cfb, var) != 0);
 917         BUG_ON(cyber2000fb_decode_crtc(&hw, cfb, var) != 0);
 918
 919         hw.width -= 1;
 920         hw.fetch = hw.pitch;
 921         if (!(cfb->mem_ctl2 & MEM_CTL2_64BIT))
 922                 hw.fetch <<= 1;
 923         hw.fetch += 1;
 924
 925         cfb->fb.fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
 926
 927         /*
 928          * Same here - if the size of the video mode exceeds the
 929          * available RAM, we can't prevent this mode being set.
 930          *
 931          * In theory, since NetWinders contain just one VGA card,
 932          * we should never end up hitting this problem.
 933          */
 934         mem = cfb->fb.fix.line_length * var->yres_virtual;
 935         BUG_ON(mem > cfb->fb.fix.smem_len);
 936
 937         /*
 938          * 8bpp displays are always pseudo colour.  16bpp and above
 939          * are direct colour or true colour, depending on whether
 940          * the RAMDAC palettes are bypassed.  (Direct colour has
 941          * palettes, true colour does not.)
 942          */
 943         if (var->bits_per_pixel == 8)
 944                 cfb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 945         else if (hw.ramdac & RAMDAC_BYPASS)
 946                 cfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 947         else
 948                 cfb->fb.fix.visual = FB_VISUAL_DIRECTCOLOR;
 949
 950         cyber2000fb_set_timing(cfb, &hw);
 951         cyber2000fb_update_start(cfb, var);
 952
 953         return 0;
 954 }
 955
 956
 957 /*
 958  *    Pan or Wrap the Display
 959  */
 960 static int
 961 cyber2000fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 962 {
 963         struct cfb_info *cfb = (struct cfb_info *)info;
 964
 965         if (cyber2000fb_update_start(cfb, var))
 966                 return -EINVAL;
 967
 968         cfb->fb.var.xoffset = var->xoffset;
 969         cfb->fb.var.yoffset = var->yoffset;
 970
 971         if (var->vmode & FB_VMODE_YWRAP) {
 972                 cfb->fb.var.vmode |= FB_VMODE_YWRAP;
 973         } else {
 974                 cfb->fb.var.vmode &= ~FB_VMODE_YWRAP;
 975         }
 976
 977         return 0;
 978 }
 979
 980 /*
 981  *    (Un)Blank the display.
 982  *
 983  *  Blank the screen if blank_mode != 0, else unblank. If
 984  *  blank == NULL then the caller blanks by setting the CLUT
 985  *  (Color Look Up Table) to all black. Return 0 if blanking
 986  *  succeeded, != 0 if un-/blanking failed due to e.g. a
 987  *  video mode which doesn't support it. Implements VESA
 988  *  suspend and powerdown modes on hardware that supports
 989  *  disabling hsync/vsync:
 990  *    blank_mode == 2: suspend vsync
 991  *    blank_mode == 3: suspend hsync
 992  *    blank_mode == 4: powerdown
 993  *
 994  *  wms...Enable VESA DMPS compatible powerdown mode
 995  *  run "setterm -powersave powerdown" to take advantage
 996  */
 997 static int cyber2000fb_blank(int blank, struct fb_info *info)
 998 {
 999         struct cfb_info *cfb = (struct cfb_info *)info;
1000         unsigned int sync = 0;
1001         int i;
1002
1003         switch (blank) {
1004         case FB_BLANK_POWERDOWN:        /* powerdown - both sync lines down */
1005                 sync = EXT_SYNC_CTL_VS_0 | EXT_SYNC_CTL_HS_0;
1006                 break;
1007         case FB_BLANK_HSYNC_SUSPEND:    /* hsync off */
1008                 sync = EXT_SYNC_CTL_VS_NORMAL | EXT_SYNC_CTL_HS_0;
1009                 break;
1010         case FB_BLANK_VSYNC_SUSPEND:    /* vsync off */
1011                 sync = EXT_SYNC_CTL_VS_0 | EXT_SYNC_CTL_HS_NORMAL;
1012                 break;
1013         case FB_BLANK_NORMAL:           /* soft blank */
1014         default: /* unblank */
1015                 break;
1016         }
1017
1018         cyber2000_grphw(EXT_SYNC_CTL, sync, cfb);
1019
1020         if (blank <= 1) {
1021                 /* turn on ramdacs */
1022                 cfb->ramdac_powerdown &= ~(RAMDAC_DACPWRDN | RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
1023                 cyber2000fb_write_ramdac_ctrl(cfb);
1024         }
1025
1026         /*
1027          * Soft blank/unblank the display.
1028          */
1029         if (blank) {    /* soft blank */
1030                 for (i = 0; i < NR_PALETTE; i++) {
1031                         cyber2000fb_writeb(i, 0x3c8, cfb);
1032                         cyber2000fb_writeb(0, 0x3c9, cfb);
1033                         cyber2000fb_writeb(0, 0x3c9, cfb);
1034                         cyber2000fb_writeb(0, 0x3c9, cfb);
1035                 }
1036         } else {        /* unblank */
1037                 for (i = 0; i < NR_PALETTE; i++) {
1038                         cyber2000fb_writeb(i, 0x3c8, cfb);
1039                         cyber2000fb_writeb(cfb->palette[i].red, 0x3c9, cfb);
1040                         cyber2000fb_writeb(cfb->palette[i].green, 0x3c9, cfb);
1041                         cyber2000fb_writeb(cfb->palette[i].blue, 0x3c9, cfb);
1042                 }
1043         }
1044
1045         if (blank >= 2) {
1046                 /* turn off ramdacs */
1047                 cfb->ramdac_powerdown |= RAMDAC_DACPWRDN | RAMDAC_BYPASS | RAMDAC_RAMPWRDN;
1048                 cyber2000fb_write_ramdac_ctrl(cfb);
1049         }
1050
1051         return 0;
1052 }
1053
1054 static struct fb_ops cyber2000fb_ops = {
1055         .owner          = THIS_MODULE,
1056         .fb_check_var   = cyber2000fb_check_var,
1057         .fb_set_par     = cyber2000fb_set_par,
1058         .fb_setcolreg   = cyber2000fb_setcolreg,
1059         .fb_blank       = cyber2000fb_blank,
1060         .fb_pan_display = cyber2000fb_pan_display,
1061         .fb_fillrect    = cyber2000fb_fillrect,
1062         .fb_copyarea    = cyber2000fb_copyarea,
1063         .fb_imageblit   = cyber2000fb_imageblit,
1064         .fb_sync        = cyber2000fb_sync,
1065 };
1066
1067 /*
1068  * This is the only "static" reference to the internal data structures
1069  * of this driver.  It is here solely at the moment to support the other
1070  * CyberPro modules external to this driver.
1071  */
1072 static struct cfb_info          *int_cfb_info;
1073
1074 /*
1075  * Enable access to the extended registers
1076  */
1077 void cyber2000fb_enable_extregs(struct cfb_info *cfb)
1078 {
1079         cfb->func_use_count += 1;
1080
1081         if (cfb->func_use_count == 1) {
1082                 int old;
1083
1084                 old = cyber2000_grphr(EXT_FUNC_CTL, cfb);
1085                 old |= EXT_FUNC_CTL_EXTREGENBL;
1086                 cyber2000_grphw(EXT_FUNC_CTL, old, cfb);
1087         }
1088 }
1089
1090 /*
1091  * Disable access to the extended registers
1092  */
1093 void cyber2000fb_disable_extregs(struct cfb_info *cfb)
1094 {
1095         if (cfb->func_use_count == 1) {
1096                 int old;
1097
1098                 old = cyber2000_grphr(EXT_FUNC_CTL, cfb);
1099                 old &= ~EXT_FUNC_CTL_EXTREGENBL;
1100                 cyber2000_grphw(EXT_FUNC_CTL, old, cfb);
1101         }
1102
1103         if (cfb->func_use_count == 0)
1104                 printk(KERN_ERR "disable_extregs: count = 0\n");
1105         else
1106                 cfb->func_use_count -= 1;
1107 }
1108
1109 void cyber2000fb_get_fb_var(struct cfb_info *cfb, struct fb_var_screeninfo *var)
1110 {
1111         memcpy(var, &cfb->fb.var, sizeof(struct fb_var_screeninfo));
1112 }
1113
1114 /*
1115  * Attach a capture/tv driver to the core CyberX0X0 driver.
1116  */
1117 int cyber2000fb_attach(struct cyberpro_info *info, int idx)
1118 {
1119         if (int_cfb_info != NULL) {
1120                 info->dev             = int_cfb_info->dev;
1121                 info->regs            = int_cfb_info->regs;
1122                 info->fb              = int_cfb_info->fb.screen_base;
1123                 info->fb_size         = int_cfb_info->fb.fix.smem_len;
1124                 info->enable_extregs  = cyber2000fb_enable_extregs;
1125                 info->disable_extregs = cyber2000fb_disable_extregs;
1126                 info->info            = int_cfb_info;
1127
1128                 strlcpy(info->dev_name, int_cfb_info->fb.fix.id, sizeof(info->dev_name));
1129         }
1130
1131         return int_cfb_info != NULL;
1132 }
1133
1134 /*
1135  * Detach a capture/tv driver from the core CyberX0X0 driver.
1136  */
1137 void cyber2000fb_detach(int idx)
1138 {
1139 }
1140
1141 EXPORT_SYMBOL(cyber2000fb_attach);
1142 EXPORT_SYMBOL(cyber2000fb_detach);
1143 EXPORT_SYMBOL(cyber2000fb_enable_extregs);
1144 EXPORT_SYMBOL(cyber2000fb_disable_extregs);
1145 EXPORT_SYMBOL(cyber2000fb_get_fb_var);
1146
1147 /*
1148  * These parameters give
1149  * 640x480, hsync 31.5kHz, vsync 60Hz
1150  */
1151 static struct fb_videomode __devinitdata cyber2000fb_default_mode = {
1152         .refresh        = 60,
1153         .xres           = 640,
1154         .yres           = 480,
1155         .pixclock       = 39722,
1156         .left_margin    = 56,
1157         .right_margin   = 16,
1158         .upper_margin   = 34,
1159         .lower_margin   = 9,
1160         .hsync_len      = 88,
1161         .vsync_len      = 2,
1162         .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
1163         .vmode          = FB_VMODE_NONINTERLACED
1164 };
1165
1166 static char igs_regs[] = {
1167         EXT_CRT_IRQ,            0,
1168         EXT_CRT_TEST,           0,
1169         EXT_SYNC_CTL,           0,
1170         EXT_SEG_WRITE_PTR,      0,
1171         EXT_SEG_READ_PTR,       0,
1172         EXT_BIU_MISC,           EXT_BIU_MISC_LIN_ENABLE |
1173                                 EXT_BIU_MISC_COP_ENABLE |
1174                                 EXT_BIU_MISC_COP_BFC,
1175         EXT_FUNC_CTL,           0,
1176         CURS_H_START,           0,
1177         CURS_H_START + 1,       0,
1178         CURS_H_PRESET,          0,
1179         CURS_V_START,           0,
1180         CURS_V_START + 1,       0,
1181         CURS_V_PRESET,          0,
1182         CURS_CTL,               0,
1183         EXT_ATTRIB_CTL,         EXT_ATTRIB_CTL_EXT,
1184         EXT_OVERSCAN_RED,       0,
1185         EXT_OVERSCAN_GREEN,     0,
1186         EXT_OVERSCAN_BLUE,      0,
1187
1188         /* some of these are questionable when we have a BIOS */
1189         EXT_MEM_CTL0,           EXT_MEM_CTL0_7CLK |
1190                                 EXT_MEM_CTL0_RAS_1 |
1191                                 EXT_MEM_CTL0_MULTCAS,
1192         EXT_HIDDEN_CTL1,        0x30,
1193         EXT_FIFO_CTL,           0x0b,
1194         EXT_FIFO_CTL + 1,       0x17,
1195         0x76,                   0x00,
1196         EXT_HIDDEN_CTL4,        0xc8
1197 };
1198
1199 /*
1200  * Initialise the CyberPro hardware.  On the CyberPro5XXXX,
1201  * ensure that we're using the correct PLL (5XXX's may be
1202  * programmed to use an additional set of PLLs.)
1203  */
1204 static void cyberpro_init_hw(struct cfb_info *cfb)
1205 {
1206         int i;
1207
1208         for (i = 0; i < sizeof(igs_regs); i += 2)
1209                 cyber2000_grphw(igs_regs[i], igs_regs[i+1], cfb);
1210
1211         if (cfb->id == ID_CYBERPRO_5000) {
1212                 unsigned char val;
1213                 cyber2000fb_writeb(0xba, 0x3ce, cfb);
1214                 val = cyber2000fb_readb(0x3cf, cfb) & 0x80;
1215                 cyber2000fb_writeb(val, 0x3cf, cfb);
1216         }
1217 }
1218
1219 static struct cfb_info * __devinit
1220 cyberpro_alloc_fb_info(unsigned int id, char *name)
1221 {
1222         struct cfb_info *cfb;
1223
1224         cfb = kmalloc(sizeof(struct cfb_info), GFP_KERNEL);
1225         if (!cfb)
1226                 return NULL;
1227
1228         memset(cfb, 0, sizeof(struct cfb_info));
1229
1230         cfb->id                 = id;
1231
1232         if (id == ID_CYBERPRO_5000)
1233                 cfb->ref_ps     = 40690; // 24.576 MHz
1234         else
1235                 cfb->ref_ps     = 69842; // 14.31818 MHz (69841?)
1236
1237         cfb->divisors[0]        = 1;
1238         cfb->divisors[1]        = 2;
1239         cfb->divisors[2]        = 4;
1240
1241         if (id == ID_CYBERPRO_2000)
1242                 cfb->divisors[3] = 8;
1243         else
1244                 cfb->divisors[3] = 6;
1245
1246         strcpy(cfb->fb.fix.id, name);
1247
1248         cfb->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1249         cfb->fb.fix.type_aux    = 0;
1250         cfb->fb.fix.xpanstep    = 0;
1251         cfb->fb.fix.ypanstep    = 1;
1252         cfb->fb.fix.ywrapstep   = 0;
1253
1254         switch (id) {
1255         case ID_IGA_1682:
1256                 cfb->fb.fix.accel = 0;
1257                 break;
1258
1259         case ID_CYBERPRO_2000:
1260                 cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2000;
1261                 break;
1262
1263         case ID_CYBERPRO_2010:
1264                 cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2010;
1265                 break;
1266
1267         case ID_CYBERPRO_5000:
1268                 cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER5000;
1269                 break;
1270         }
1271
1272         cfb->fb.var.nonstd      = 0;
1273         cfb->fb.var.activate    = FB_ACTIVATE_NOW;
1274         cfb->fb.var.height      = -1;
1275         cfb->fb.var.width       = -1;
1276         cfb->fb.var.accel_flags = FB_ACCELF_TEXT;
1277
1278         cfb->fb.fbops           = &cyber2000fb_ops;
1279         cfb->fb.flags           = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1280         cfb->fb.pseudo_palette  = cfb->pseudo_palette;
1281
1282         fb_alloc_cmap(&cfb->fb.cmap, NR_PALETTE, 0);
1283
1284         return cfb;
1285 }
1286
1287 static void
1288 cyberpro_free_fb_info(struct cfb_info *cfb)
1289 {
1290         if (cfb) {
1291                 /*
1292                  * Free the colourmap
1293                  */
1294                 fb_alloc_cmap(&cfb->fb.cmap, 0, 0);
1295
1296                 kfree(cfb);
1297         }
1298 }
1299
1300 /*
1301  * Parse Cyber2000fb options.  Usage:
1302  *  video=cyber2000:font:fontname
1303  */
1304 #ifndef MODULE
1305 static int
1306 cyber2000fb_setup(char *options)
1307 {
1308         char *opt;
1309
1310         if (!options || !*options)
1311                 return 0;
1312
1313         while ((opt = strsep(&options, ",")) != NULL) {
1314                 if (!*opt)
1315                         continue;
1316
1317                 if (strncmp(opt, "font:", 5) == 0) {
1318                         static char default_font_storage[40];
1319
1320                         strlcpy(default_font_storage, opt + 5, sizeof(default_font_storage));
1321                         default_font = default_font_storage;
1322                         continue;
1323                 }
1324
1325                 printk(KERN_ERR "CyberPro20x0: unknown parameter: %s\n", opt);
1326         }
1327         return 0;
1328 }
1329 #endif  /*  MODULE  */
1330
1331 /*
1332  * The CyberPro chips can be placed on many different bus types.
1333  * This probe function is common to all bus types.  The bus-specific
1334  * probe function is expected to have:
1335  *  - enabled access to the linear memory region
1336  *  - memory mapped access to the registers
1337  *  - initialised mem_ctl1 and mem_ctl2 appropriately.
1338  */
1339 static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
1340 {
1341         u_long smem_size;
1342         u_int h_sync, v_sync;
1343         int err;
1344
1345         cyberpro_init_hw(cfb);
1346
1347         /*
1348          * Get the video RAM size and width from the VGA register.
1349          * This should have been already initialised by the BIOS,
1350          * but if it's garbage, claim default 1MB VRAM (woody)
1351          */
1352         cfb->mem_ctl1 = cyber2000_grphr(EXT_MEM_CTL1, cfb);
1353         cfb->mem_ctl2 = cyber2000_grphr(EXT_MEM_CTL2, cfb);
1354
1355         /*
1356          * Determine the size of the memory.
1357          */
1358         switch (cfb->mem_ctl2 & MEM_CTL2_SIZE_MASK) {
1359         case MEM_CTL2_SIZE_4MB: smem_size = 0x00400000; break;
1360         case MEM_CTL2_SIZE_2MB: smem_size = 0x00200000; break;
1361         case MEM_CTL2_SIZE_1MB: smem_size = 0x00100000; break;
1362         default:                smem_size = 0x00100000; break;
1363         }
1364
1365         cfb->fb.fix.smem_len   = smem_size;
1366         cfb->fb.fix.mmio_len   = MMIO_SIZE;
1367         cfb->fb.screen_base    = cfb->region;
1368
1369         err = -EINVAL;
1370         if (!fb_find_mode(&cfb->fb.var, &cfb->fb, NULL, NULL, 0,
1371                           &cyber2000fb_default_mode, 8)) {
1372                 printk("%s: no valid mode found\n", cfb->fb.fix.id);
1373                 goto failed;
1374         }
1375
1376         cfb->fb.var.yres_virtual = cfb->fb.fix.smem_len * 8 /
1377                         (cfb->fb.var.bits_per_pixel * cfb->fb.var.xres_virtual);
1378
1379         if (cfb->fb.var.yres_virtual < cfb->fb.var.yres)
1380                 cfb->fb.var.yres_virtual = cfb->fb.var.yres;
1381
1382 //      fb_set_var(&cfb->fb.var, -1, &cfb->fb);
1383
1384         /*
1385          * Calculate the hsync and vsync frequencies.  Note that
1386          * we split the 1e12 constant up so that we can preserve
1387          * the precision and fit the results into 32-bit registers.
1388          *  (1953125000 * 512 = 1e12)
1389          */
1390         h_sync = 1953125000 / cfb->fb.var.pixclock;
1391         h_sync = h_sync * 512 / (cfb->fb.var.xres + cfb->fb.var.left_margin +
1392                  cfb->fb.var.right_margin + cfb->fb.var.hsync_len);
1393         v_sync = h_sync / (cfb->fb.var.yres + cfb->fb.var.upper_margin +
1394                  cfb->fb.var.lower_margin + cfb->fb.var.vsync_len);
1395
1396         printk(KERN_INFO "%s: %dKiB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
1397                 cfb->fb.fix.id, cfb->fb.fix.smem_len >> 10,
1398                 cfb->fb.var.xres, cfb->fb.var.yres,
1399                 h_sync / 1000, h_sync % 1000, v_sync);
1400
1401         if (cfb->dev)
1402                 cfb->fb.device = &cfb->dev->dev;
1403         err = register_framebuffer(&cfb->fb);
1404
1405 failed:
1406         return err;
1407 }
1408
1409 static void cyberpro_common_resume(struct cfb_info *cfb)
1410 {
1411         cyberpro_init_hw(cfb);
1412
1413         /*
1414          * Reprogram the MEM_CTL1 and MEM_CTL2 registers
1415          */
1416         cyber2000_grphw(EXT_MEM_CTL1, cfb->mem_ctl1, cfb);
1417         cyber2000_grphw(EXT_MEM_CTL2, cfb->mem_ctl2, cfb);
1418
1419         /*
1420          * Restore the old video mode and the palette.
1421          * We also need to tell fbcon to redraw the console.
1422          */
1423         cyber2000fb_set_par(&cfb->fb);
1424 }
1425
1426 #ifdef CONFIG_ARCH_SHARK
1427
1428 #include <asm/arch/hardware.h>
1429
1430 static int __devinit
1431 cyberpro_vl_probe(void)
1432 {
1433         struct cfb_info *cfb;
1434         int err = -ENOMEM;
1435
1436         if (!request_mem_region(FB_START,FB_SIZE,"CyberPro2010")) return err;
1437
1438         cfb = cyberpro_alloc_fb_info(ID_CYBERPRO_2010, "CyberPro2010");
1439         if (!cfb)
1440                 goto failed_release;
1441
1442         cfb->dev = NULL;
1443         cfb->region = ioremap(FB_START,FB_SIZE);
1444         if (!cfb->region)
1445                 goto failed_ioremap;
1446
1447         cfb->regs = cfb->region + MMIO_OFFSET;
1448         cfb->fb.fix.mmio_start = FB_START + MMIO_OFFSET;
1449         cfb->fb.fix.smem_start = FB_START;
1450
1451         /*
1452          * Bring up the hardware.  This is expected to enable access
1453          * to the linear memory region, and allow access to the memory
1454          * mapped registers.  Also, mem_ctl1 and mem_ctl2 must be
1455          * initialised.
1456          */
1457         cyber2000fb_writeb(0x18, 0x46e8, cfb);
1458         cyber2000fb_writeb(0x01, 0x102, cfb);
1459         cyber2000fb_writeb(0x08, 0x46e8, cfb);
1460         cyber2000fb_writeb(EXT_BIU_MISC, 0x3ce, cfb);
1461         cyber2000fb_writeb(EXT_BIU_MISC_LIN_ENABLE, 0x3cf, cfb);
1462
1463         cfb->mclk_mult = 0xdb;
1464         cfb->mclk_div  = 0x54;
1465
1466         err = cyberpro_common_probe(cfb);
1467         if (err)
1468                 goto failed;
1469
1470         if (int_cfb_info == NULL)
1471                 int_cfb_info = cfb;
1472
1473         return 0;
1474
1475 failed:
1476         iounmap(cfb->region);
1477 failed_ioremap:
1478         cyberpro_free_fb_info(cfb);
1479 failed_release:
1480         release_mem_region(FB_START,FB_SIZE);
1481
1482         return err;
1483 }
1484 #endif /* CONFIG_ARCH_SHARK */
1485
1486 /*
1487  * PCI specific support.
1488  */
1489 #ifdef CONFIG_PCI
1490 /*
1491  * We need to wake up the CyberPro, and make sure its in linear memory
1492  * mode.  Unfortunately, this is specific to the platform and card that
1493  * we are running on.
1494  *
1495  * On x86 and ARM, should we be initialising the CyberPro first via the
1496  * IO registers, and then the MMIO registers to catch all cases?  Can we
1497  * end up in the situation where the chip is in MMIO mode, but not awake
1498  * on an x86 system?
1499  */
1500 static int cyberpro_pci_enable_mmio(struct cfb_info *cfb)
1501 {
1502         unsigned char val;
1503
1504 #if defined(__sparc_v9__)
1505 #error "You lose, consult DaveM."
1506 #elif defined(__sparc__)
1507         /*
1508          * SPARC does not have an "outb" instruction, so we generate
1509          * I/O cycles storing into a reserved memory space at
1510          * physical address 0x3000000
1511          */
1512         unsigned char __iomem *iop;
1513
1514         iop = ioremap(0x3000000, 0x5000);
1515         if (iop == NULL) {
1516                 prom_printf("iga5000: cannot map I/O\n");
1517                 return -ENOMEM;
1518         }
1519
1520         writeb(0x18, iop + 0x46e8);
1521         writeb(0x01, iop + 0x102);
1522         writeb(0x08, iop + 0x46e8);
1523         writeb(EXT_BIU_MISC, iop + 0x3ce);
1524         writeb(EXT_BIU_MISC_LIN_ENABLE, iop + 0x3cf);
1525
1526         iounmap(iop);
1527 #else
1528         /*
1529          * Most other machine types are "normal", so
1530          * we use the standard IO-based wakeup.
1531          */
1532         outb(0x18, 0x46e8);
1533         outb(0x01, 0x102);
1534         outb(0x08, 0x46e8);
1535         outb(EXT_BIU_MISC, 0x3ce);
1536         outb(EXT_BIU_MISC_LIN_ENABLE, 0x3cf);
1537 #endif
1538
1539         /*
1540          * Allow the CyberPro to accept PCI burst accesses
1541          */
1542         if (cfb->id == ID_CYBERPRO_2010) {
1543                 printk(KERN_INFO "%s: NOT enabling PCI bursts\n", cfb->fb.fix.id);
1544         } else {
1545                 val = cyber2000_grphr(EXT_BUS_CTL, cfb);
1546                 if (!(val & EXT_BUS_CTL_PCIBURST_WRITE)) {
1547                         printk(KERN_INFO "%s: enabling PCI bursts\n",
1548                                 cfb->fb.fix.id);
1549
1550                         val |= EXT_BUS_CTL_PCIBURST_WRITE;
1551
1552                         if (cfb->id == ID_CYBERPRO_5000)
1553                                 val |= EXT_BUS_CTL_PCIBURST_READ;
1554
1555                         cyber2000_grphw(EXT_BUS_CTL, val, cfb);
1556                 }
1557         }
1558
1559         return 0;
1560 }
1561
1562 static int __devinit
1563 cyberpro_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
1564 {
1565         struct cfb_info *cfb;
1566         char name[16];
1567         int err;
1568
1569         sprintf(name, "CyberPro%4X", id->device);
1570
1571         err = pci_enable_device(dev);
1572         if (err)
1573                 return err;
1574
1575         err = pci_request_regions(dev, name);
1576         if (err)
1577                 return err;
1578
1579         err = -ENOMEM;
1580         cfb = cyberpro_alloc_fb_info(id->driver_data, name);
1581         if (!cfb)
1582                 goto failed_release;
1583
1584         cfb->dev = dev;
1585         cfb->region = ioremap(pci_resource_start(dev, 0),
1586                               pci_resource_len(dev, 0));
1587         if (!cfb->region)
1588                 goto failed_ioremap;
1589
1590         cfb->regs = cfb->region + MMIO_OFFSET;
1591         cfb->fb.fix.mmio_start = pci_resource_start(dev, 0) + MMIO_OFFSET;
1592         cfb->fb.fix.smem_start = pci_resource_start(dev, 0);
1593
1594         /*
1595          * Bring up the hardware.  This is expected to enable access
1596          * to the linear memory region, and allow access to the memory
1597          * mapped registers.  Also, mem_ctl1 and mem_ctl2 must be
1598          * initialised.
1599          */
1600         err = cyberpro_pci_enable_mmio(cfb);
1601         if (err)
1602                 goto failed;
1603
1604         /*
1605          * Use MCLK from BIOS. FIXME: what about hotplug?
1606          */
1607         cfb->mclk_mult = cyber2000_grphr(EXT_MCLK_MULT, cfb);
1608         cfb->mclk_div  = cyber2000_grphr(EXT_MCLK_DIV, cfb);
1609
1610 #ifdef __arm__
1611         /*
1612          * MCLK on the NetWinder and the Shark is fixed at 75MHz
1613          */
1614         if (machine_is_netwinder()) {
1615                 cfb->mclk_mult = 0xdb;
1616                 cfb->mclk_div  = 0x54;
1617         }
1618 #endif
1619
1620         err = cyberpro_common_probe(cfb);
1621         if (err)
1622                 goto failed;
1623
1624         /*
1625          * Our driver data
1626          */
1627         pci_set_drvdata(dev, cfb);
1628         if (int_cfb_info == NULL)
1629                 int_cfb_info = cfb;
1630
1631         return 0;
1632
1633 failed:
1634         iounmap(cfb->region);
1635 failed_ioremap:
1636         cyberpro_free_fb_info(cfb);
1637 failed_release:
1638         pci_release_regions(dev);
1639
1640         return err;
1641 }
1642
1643 static void __devexit cyberpro_pci_remove(struct pci_dev *dev)
1644 {
1645         struct cfb_info *cfb = pci_get_drvdata(dev);
1646
1647         if (cfb) {
1648                 /*
1649                  * If unregister_framebuffer fails, then
1650                  * we will be leaving hooks that could cause
1651                  * oopsen laying around.
1652                  */
1653                 if (unregister_framebuffer(&cfb->fb))
1654                         printk(KERN_WARNING "%s: danger Will Robinson, "
1655                                 "danger danger!  Oopsen imminent!\n",
1656                                 cfb->fb.fix.id);
1657                 iounmap(cfb->region);
1658                 cyberpro_free_fb_info(cfb);
1659
1660                 /*
1661                  * Ensure that the driver data is no longer
1662                  * valid.
1663                  */
1664                 pci_set_drvdata(dev, NULL);
1665                 if (cfb == int_cfb_info)
1666                         int_cfb_info = NULL;
1667
1668                 pci_release_regions(dev);
1669         }
1670 }
1671
1672 static int cyberpro_pci_suspend(struct pci_dev *dev, pm_message_t state)
1673 {
1674         return 0;
1675 }
1676
1677 /*
1678  * Re-initialise the CyberPro hardware
1679  */
1680 static int cyberpro_pci_resume(struct pci_dev *dev)
1681 {
1682         struct cfb_info *cfb = pci_get_drvdata(dev);
1683
1684         if (cfb) {
1685                 cyberpro_pci_enable_mmio(cfb);
1686                 cyberpro_common_resume(cfb);
1687         }
1688
1689         return 0;
1690 }
1691
1692 static struct pci_device_id cyberpro_pci_table[] = {
1693 //      Not yet
1694 //      { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
1695 //              PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_IGA_1682 },
1696         { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2000,
1697                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2000 },
1698         { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2010,
1699                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2010 },
1700         { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_5000,
1701                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_5000 },
1702         { 0, }
1703 };
1704
1705 MODULE_DEVICE_TABLE(pci,cyberpro_pci_table);
1706
1707 static struct pci_driver cyberpro_driver = {
1708         .name           = "CyberPro",
1709         .probe          = cyberpro_pci_probe,
1710         .remove         = __devexit_p(cyberpro_pci_remove),
1711         .suspend        = cyberpro_pci_suspend,
1712         .resume         = cyberpro_pci_resume,
1713         .id_table       = cyberpro_pci_table
1714 };
1715 #endif
1716
1717 /*
1718  * I don't think we can use the "module_init" stuff here because
1719  * the fbcon stuff may not be initialised yet.  Hence the #ifdef
1720  * around module_init.
1721  *
1722  * Tony: "module_init" is now required
1723  */
1724 static int __init cyber2000fb_init(void)
1725 {
1726         int ret = -1, err;
1727
1728 #ifndef MODULE
1729         char *option = NULL;
1730
1731         if (fb_get_options("cyber2000fb", &option))
1732                 return -ENODEV;
1733         cyber2000fb_setup(option);
1734 #endif
1735
1736 #ifdef CONFIG_ARCH_SHARK
1737         err = cyberpro_vl_probe();
1738         if (!err) {
1739                 ret = 0;
1740                 __module_get(THIS_MODULE);
1741         }
1742 #endif
1743 #ifdef CONFIG_PCI
1744         err = pci_register_driver(&cyberpro_driver);
1745         if (!err)
1746                 ret = 0;
1747 #endif
1748
1749         return ret ? err : 0;
1750 }
1751
1752 static void __exit cyberpro_exit(void)
1753 {
1754         pci_unregister_driver(&cyberpro_driver);
1755 }
1756
1757 module_init(cyber2000fb_init);
1758 module_exit(cyberpro_exit);
1759
1760 MODULE_AUTHOR("Russell King");
1761 MODULE_DESCRIPTION("CyberPro 2000, 2010 and 5000 framebuffer driver");
1762 MODULE_LICENSE("GPL");