drivers/video/fbdev/i740fb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * i740fb - framebuffer driver for Intel740
   4  * Copyright (c) 2011 Ondrej Zary
   5  *
   6  * Based on old i740fb driver (c) 2001-2002 Andrey Ulanov <drey@rt.mipt.ru>
   7  * which was partially based on:
   8  *  VGA 16-color framebuffer driver (c) 1999 Ben Pfaff <pfaffben@debian.org>
   9  *      and Petr Vandrovec <VANDROVE@vc.cvut.cz>
  10  *  i740 driver from XFree86 (c) 1998-1999 Precision Insight, Inc., Cedar Park,
  11  *      Texas.
  12  *  i740fb by Patrick LERDA, v0.9
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/string.h>
  19 #include <linux/mm.h>
  20 #include <linux/slab.h>
  21 #include <linux/delay.h>
  22 #include <linux/fb.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/pci_ids.h>
  26 #include <linux/i2c.h>
  27 #include <linux/i2c-algo-bit.h>
  28 #include <linux/console.h>
  29 #include <video/vga.h>
  30
  31 #include "i740_reg.h"
  32
  33 static char *mode_option;
  34 static int mtrr = 1;
  35
  36 struct i740fb_par {
  37         unsigned char __iomem *regs;
  38         bool has_sgram;
  39         int wc_cookie;
  40         bool ddc_registered;
  41         struct i2c_adapter ddc_adapter;
  42         struct i2c_algo_bit_data ddc_algo;
  43         u32 pseudo_palette[16];
  44         struct mutex open_lock;
  45         unsigned int ref_count;
  46
  47         u8 crtc[VGA_CRT_C];
  48         u8 atc[VGA_ATT_C];
  49         u8 gdc[VGA_GFX_C];
  50         u8 seq[VGA_SEQ_C];
  51         u8 misc;
  52         u8 vss;
  53
  54         /* i740 specific registers */
  55         u8 display_cntl;
  56         u8 pixelpipe_cfg0;
  57         u8 pixelpipe_cfg1;
  58         u8 pixelpipe_cfg2;
  59         u8 video_clk2_m;
  60         u8 video_clk2_n;
  61         u8 video_clk2_mn_msbs;
  62         u8 video_clk2_div_sel;
  63         u8 pll_cntl;
  64         u8 address_mapping;
  65         u8 io_cntl;
  66         u8 bitblt_cntl;
  67         u8 ext_vert_total;
  68         u8 ext_vert_disp_end;
  69         u8 ext_vert_sync_start;
  70         u8 ext_vert_blank_start;
  71         u8 ext_horiz_total;
  72         u8 ext_horiz_blank;
  73         u8 ext_offset;
  74         u8 interlace_cntl;
  75         u32 lmi_fifo_watermark;
  76         u8 ext_start_addr;
  77         u8 ext_start_addr_hi;
  78 };
  79
  80 #define DACSPEED8       203
  81 #define DACSPEED16      163
  82 #define DACSPEED24_SG   136
  83 #define DACSPEED24_SD   128
  84 #define DACSPEED32      86
  85
  86 static const struct fb_fix_screeninfo i740fb_fix = {
  87         .id =           "i740fb",
  88         .type =         FB_TYPE_PACKED_PIXELS,
  89         .visual =       FB_VISUAL_TRUECOLOR,
  90         .xpanstep =     8,
  91         .ypanstep =     1,
  92         .accel =        FB_ACCEL_NONE,
  93 };
  94
  95 static inline void i740outb(struct i740fb_par *par, u16 port, u8 val)
  96 {
  97         vga_mm_w(par->regs, port, val);
  98 }
  99 static inline u8 i740inb(struct i740fb_par *par, u16 port)
 100 {
 101         return vga_mm_r(par->regs, port);
 102 }
 103 static inline void i740outreg(struct i740fb_par *par, u16 port, u8 reg, u8 val)
 104 {
 105         vga_mm_w_fast(par->regs, port, reg, val);
 106 }
 107 static inline u8 i740inreg(struct i740fb_par *par, u16 port, u8 reg)
 108 {
 109         vga_mm_w(par->regs, port, reg);
 110         return vga_mm_r(par->regs, port+1);
 111 }
 112 static inline void i740outreg_mask(struct i740fb_par *par, u16 port, u8 reg,
 113                                    u8 val, u8 mask)
 114 {
 115         vga_mm_w_fast(par->regs, port, reg, (val & mask)
 116                 | (i740inreg(par, port, reg) & ~mask));
 117 }
 118
 119 #define REG_DDC_DRIVE   0x62
 120 #define REG_DDC_STATE   0x63
 121 #define DDC_SCL         (1 << 3)
 122 #define DDC_SDA         (1 << 2)
 123
 124 static void i740fb_ddc_setscl(void *data, int val)
 125 {
 126         struct i740fb_par *par = data;
 127
 128         i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SCL, DDC_SCL);
 129         i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SCL : 0, DDC_SCL);
 130 }
 131
 132 static void i740fb_ddc_setsda(void *data, int val)
 133 {
 134         struct i740fb_par *par = data;
 135
 136         i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SDA, DDC_SDA);
 137         i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SDA : 0, DDC_SDA);
 138 }
 139
 140 static int i740fb_ddc_getscl(void *data)
 141 {
 142         struct i740fb_par *par = data;
 143
 144         i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SCL);
 145
 146         return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SCL);
 147 }
 148
 149 static int i740fb_ddc_getsda(void *data)
 150 {
 151         struct i740fb_par *par = data;
 152
 153         i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SDA);
 154
 155         return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SDA);
 156 }
 157
 158 static int i740fb_setup_ddc_bus(struct fb_info *info)
 159 {
 160         struct i740fb_par *par = info->par;
 161
 162         strlcpy(par->ddc_adapter.name, info->fix.id,
 163                 sizeof(par->ddc_adapter.name));
 164         par->ddc_adapter.owner          = THIS_MODULE;
 165         par->ddc_adapter.class          = I2C_CLASS_DDC;
 166         par->ddc_adapter.algo_data      = &par->ddc_algo;
 167         par->ddc_adapter.dev.parent     = info->device;
 168         par->ddc_algo.setsda            = i740fb_ddc_setsda;
 169         par->ddc_algo.setscl            = i740fb_ddc_setscl;
 170         par->ddc_algo.getsda            = i740fb_ddc_getsda;
 171         par->ddc_algo.getscl            = i740fb_ddc_getscl;
 172         par->ddc_algo.udelay            = 10;
 173         par->ddc_algo.timeout           = 20;
 174         par->ddc_algo.data              = par;
 175
 176         i2c_set_adapdata(&par->ddc_adapter, par);
 177
 178         return i2c_bit_add_bus(&par->ddc_adapter);
 179 }
 180
 181 static int i740fb_open(struct fb_info *info, int user)
 182 {
 183         struct i740fb_par *par = info->par;
 184
 185         mutex_lock(&(par->open_lock));
 186         par->ref_count++;
 187         mutex_unlock(&(par->open_lock));
 188
 189         return 0;
 190 }
 191
 192 static int i740fb_release(struct fb_info *info, int user)
 193 {
 194         struct i740fb_par *par = info->par;
 195
 196         mutex_lock(&(par->open_lock));
 197         if (par->ref_count == 0) {
 198                 fb_err(info, "release called with zero refcount\n");
 199                 mutex_unlock(&(par->open_lock));
 200                 return -EINVAL;
 201         }
 202
 203         par->ref_count--;
 204         mutex_unlock(&(par->open_lock));
 205
 206         return 0;
 207 }
 208
 209 static u32 i740_calc_fifo(struct i740fb_par *par, u32 freq, int bpp)
 210 {
 211         /*
 212          * Would like to calculate these values automatically, but a generic
 213          * algorithm does not seem possible.  Note: These FIFO water mark
 214          * values were tested on several cards and seem to eliminate the
 215          * all of the snow and vertical banding, but fine adjustments will
 216          * probably be required for other cards.
 217          */
 218
 219         u32 wm;
 220
 221         switch (bpp) {
 222         case 8:
 223                 if      (freq > 200)
 224                         wm = 0x18120000;
 225                 else if (freq > 175)
 226                         wm = 0x16110000;
 227                 else if (freq > 135)
 228                         wm = 0x120E0000;
 229                 else
 230                         wm = 0x100D0000;
 231                 break;
 232         case 15:
 233         case 16:
 234                 if (par->has_sgram) {
 235                         if      (freq > 140)
 236                                 wm = 0x2C1D0000;
 237                         else if (freq > 120)
 238                                 wm = 0x2C180000;
 239                         else if (freq > 100)
 240                                 wm = 0x24160000;
 241                         else if (freq >  90)
 242                                 wm = 0x18120000;
 243                         else if (freq >  50)
 244                                 wm = 0x16110000;
 245                         else if (freq >  32)
 246                                 wm = 0x13100000;
 247                         else
 248                                 wm = 0x120E0000;
 249                 } else {
 250                         if      (freq > 160)
 251                                 wm = 0x28200000;
 252                         else if (freq > 140)
 253                                 wm = 0x2A1E0000;
 254                         else if (freq > 130)
 255                                 wm = 0x2B1A0000;
 256                         else if (freq > 120)
 257                                 wm = 0x2C180000;
 258                         else if (freq > 100)
 259                                 wm = 0x24180000;
 260                         else if (freq >  90)
 261                                 wm = 0x18120000;
 262                         else if (freq >  50)
 263                                 wm = 0x16110000;
 264                         else if (freq >  32)
 265                                 wm = 0x13100000;
 266                         else
 267                                 wm = 0x120E0000;
 268                 }
 269                 break;
 270         case 24:
 271                 if (par->has_sgram) {
 272                         if      (freq > 130)
 273                                 wm = 0x31200000;
 274                         else if (freq > 120)
 275                                 wm = 0x2E200000;
 276                         else if (freq > 100)
 277                                 wm = 0x2C1D0000;
 278                         else if (freq >  80)
 279                                 wm = 0x25180000;
 280                         else if (freq >  64)
 281                                 wm = 0x24160000;
 282                         else if (freq >  49)
 283                                 wm = 0x18120000;
 284                         else if (freq >  32)
 285                                 wm = 0x16110000;
 286                         else
 287                                 wm = 0x13100000;
 288                 } else {
 289                         if      (freq > 120)
 290                                 wm = 0x311F0000;
 291                         else if (freq > 100)
 292                                 wm = 0x2C1D0000;
 293                         else if (freq >  80)
 294                                 wm = 0x25180000;
 295                         else if (freq >  64)
 296                                 wm = 0x24160000;
 297                         else if (freq >  49)
 298                                 wm = 0x18120000;
 299                         else if (freq >  32)
 300                                 wm = 0x16110000;
 301                         else
 302                                 wm = 0x13100000;
 303                 }
 304                 break;
 305         case 32:
 306                 if (par->has_sgram) {
 307                         if      (freq >  80)
 308                                 wm = 0x2A200000;
 309                         else if (freq >  60)
 310                                 wm = 0x281A0000;
 311                         else if (freq >  49)
 312                                 wm = 0x25180000;
 313                         else if (freq >  32)
 314                                 wm = 0x18120000;
 315                         else
 316                                 wm = 0x16110000;
 317                 } else {
 318                         if      (freq >  80)
 319                                 wm = 0x29200000;
 320                         else if (freq >  60)
 321                                 wm = 0x281A0000;
 322                         else if (freq >  49)
 323                                 wm = 0x25180000;
 324                         else if (freq >  32)
 325                                 wm = 0x18120000;
 326                         else
 327                                 wm = 0x16110000;
 328                 }
 329                 break;
 330         }
 331
 332         return wm;
 333 }
 334
 335 /* clock calculation from i740fb by Patrick LERDA */
 336
 337 #define I740_RFREQ              1000000
 338 #define TARGET_MAX_N            30
 339 #define I740_FFIX               (1 << 8)
 340 #define I740_RFREQ_FIX          (I740_RFREQ / I740_FFIX)
 341 #define I740_REF_FREQ           (6667 * I740_FFIX / 100)        /* 66.67 MHz */
 342 #define I740_MAX_VCO_FREQ       (450 * I740_FFIX)               /* 450 MHz */
 343
 344 static void i740_calc_vclk(u32 freq, struct i740fb_par *par)
 345 {
 346         const u32 err_max    = freq / (200  * I740_RFREQ / I740_FFIX);
 347         const u32 err_target = freq / (1000 * I740_RFREQ / I740_FFIX);
 348         u32 err_best = 512 * I740_FFIX;
 349         u32 f_err, f_vco;
 350         int m_best = 0, n_best = 0, p_best = 0;
 351         int m, n;
 352
 353         p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX)));
 354         f_vco = (freq * (1 << p_best)) / I740_RFREQ_FIX;
 355         freq = freq / I740_RFREQ_FIX;
 356
 357         n = 2;
 358         do {
 359                 n++;
 360                 m = ((f_vco * n) / I740_REF_FREQ + 2) / 4;
 361
 362                 if (m < 3)
 363                         m = 3;
 364
 365                 {
 366                         u32 f_out = (((m * I740_REF_FREQ * 4)
 367                                  / n) + ((1 << p_best) / 2)) / (1 << p_best);
 368
 369                         f_err = (freq - f_out);
 370
 371                         if (abs(f_err) < err_max) {
 372                                 m_best = m;
 373                                 n_best = n;
 374                                 err_best = f_err;
 375                         }
 376                 }
 377         } while ((abs(f_err) >= err_target) &&
 378                  ((n <= TARGET_MAX_N) || (abs(err_best) > err_max)));
 379
 380         if (abs(f_err) < err_target) {
 381                 m_best = m;
 382                 n_best = n;
 383         }
 384
 385         par->video_clk2_m = (m_best - 2) & 0xFF;
 386         par->video_clk2_n = (n_best - 2) & 0xFF;
 387         par->video_clk2_mn_msbs = ((((n_best - 2) >> 4) & VCO_N_MSBS)
 388                                  | (((m_best - 2) >> 8) & VCO_M_MSBS));
 389         par->video_clk2_div_sel = ((p_best << 4) | REF_DIV_1);
 390 }
 391
 392 static int i740fb_decode_var(const struct fb_var_screeninfo *var,
 393                              struct i740fb_par *par, struct fb_info *info)
 394 {
 395         /*
 396          * Get the video params out of 'var'.
 397          * If a value doesn't fit, round it up, if it's too big, return -EINVAL.
 398          */
 399
 400         u32 xres, right, hslen, left, xtotal;
 401         u32 yres, lower, vslen, upper, ytotal;
 402         u32 vxres, xoffset, vyres, yoffset;
 403         u32 bpp, base, dacspeed24, mem;
 404         u8 r7;
 405         int i;
 406
 407         dev_dbg(info->device, "decode_var: xres: %i, yres: %i, xres_v: %i, xres_v: %i\n",
 408                   var->xres, var->yres, var->xres_virtual, var->xres_virtual);
 409         dev_dbg(info->device, " xoff: %i, yoff: %i, bpp: %i, graysc: %i\n",
 410                   var->xoffset, var->yoffset, var->bits_per_pixel,
 411                   var->grayscale);
 412         dev_dbg(info->device, " activate: %i, nonstd: %i, vmode: %i\n",
 413                   var->activate, var->nonstd, var->vmode);
 414         dev_dbg(info->device, " pixclock: %i, hsynclen:%i, vsynclen:%i\n",
 415                   var->pixclock, var->hsync_len, var->vsync_len);
 416         dev_dbg(info->device, " left: %i, right: %i, up:%i, lower:%i\n",
 417                   var->left_margin, var->right_margin, var->upper_margin,
 418                   var->lower_margin);
 419
 420
 421         bpp = var->bits_per_pixel;
 422         switch (bpp) {
 423         case 1 ... 8:
 424                 bpp = 8;
 425                 if ((1000000 / var->pixclock) > DACSPEED8) {
 426                         dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 8bpp)\n",
 427                                 1000000 / var->pixclock, DACSPEED8);
 428                         return -EINVAL;
 429                 }
 430                 break;
 431         case 9 ... 15:
 432                 bpp = 15;
 433                 /* fall through */
 434         case 16:
 435                 if ((1000000 / var->pixclock) > DACSPEED16) {
 436                         dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n",
 437                                 1000000 / var->pixclock, DACSPEED16);
 438                         return -EINVAL;
 439                 }
 440                 break;
 441         case 17 ... 24:
 442                 bpp = 24;
 443                 dacspeed24 = par->has_sgram ? DACSPEED24_SG : DACSPEED24_SD;
 444                 if ((1000000 / var->pixclock) > dacspeed24) {
 445                         dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 24bpp)\n",
 446                                 1000000 / var->pixclock, dacspeed24);
 447                         return -EINVAL;
 448                 }
 449                 break;
 450         case 25 ... 32:
 451                 bpp = 32;
 452                 if ((1000000 / var->pixclock) > DACSPEED32) {
 453                         dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 32bpp)\n",
 454                                 1000000 / var->pixclock, DACSPEED32);
 455                         return -EINVAL;
 456                 }
 457                 break;
 458         default:
 459                 return -EINVAL;
 460         }
 461
 462         xres = ALIGN(var->xres, 8);
 463         vxres = ALIGN(var->xres_virtual, 16);
 464         if (vxres < xres)
 465                 vxres = xres;
 466
 467         xoffset = ALIGN(var->xoffset, 8);
 468         if (xres + xoffset > vxres)
 469                 xoffset = vxres - xres;
 470
 471         left = ALIGN(var->left_margin, 8);
 472         right = ALIGN(var->right_margin, 8);
 473         hslen = ALIGN(var->hsync_len, 8);
 474
 475         yres = var->yres;
 476         vyres = var->yres_virtual;
 477         if (yres > vyres)
 478                 vyres = yres;
 479
 480         yoffset = var->yoffset;
 481         if (yres + yoffset > vyres)
 482                 yoffset = vyres - yres;
 483
 484         lower = var->lower_margin;
 485         vslen = var->vsync_len;
 486         upper = var->upper_margin;
 487
 488         mem = vxres * vyres * ((bpp + 1) / 8);
 489         if (mem > info->screen_size) {
 490                 dev_err(info->device, "not enough video memory (%d KB requested, %ld KB available)\n",
 491                         mem >> 10, info->screen_size >> 10);
 492                 return -ENOMEM;
 493         }
 494
 495         if (yoffset + yres > vyres)
 496                 yoffset = vyres - yres;
 497
 498         xtotal = xres + right + hslen + left;
 499         ytotal = yres + lower + vslen + upper;
 500
 501         par->crtc[VGA_CRTC_H_TOTAL] = (xtotal >> 3) - 5;
 502         par->crtc[VGA_CRTC_H_DISP] = (xres >> 3) - 1;
 503         par->crtc[VGA_CRTC_H_BLANK_START] = ((xres + right) >> 3) - 1;
 504         par->crtc[VGA_CRTC_H_SYNC_START] = (xres + right) >> 3;
 505         par->crtc[VGA_CRTC_H_SYNC_END] = (((xres + right + hslen) >> 3) & 0x1F)
 506                 | ((((xres + right + hslen) >> 3) & 0x20) << 2);
 507         par->crtc[VGA_CRTC_H_BLANK_END] = ((xres + right + hslen) >> 3 & 0x1F)
 508                 | 0x80;
 509
 510         par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2;
 511
 512         r7 = 0x10;      /* disable linecompare */
 513         if (ytotal & 0x100)
 514                 r7 |= 0x01;
 515         if (ytotal & 0x200)
 516                 r7 |= 0x20;
 517
 518         par->crtc[VGA_CRTC_PRESET_ROW] = 0;
 519         par->crtc[VGA_CRTC_MAX_SCAN] = 0x40;    /* 1 scanline, no linecmp */
 520         if (var->vmode & FB_VMODE_DOUBLE)
 521                 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80;
 522         par->crtc[VGA_CRTC_CURSOR_START] = 0x00;
 523         par->crtc[VGA_CRTC_CURSOR_END] = 0x00;
 524         par->crtc[VGA_CRTC_CURSOR_HI] = 0x00;
 525         par->crtc[VGA_CRTC_CURSOR_LO] = 0x00;
 526         par->crtc[VGA_CRTC_V_DISP_END] = yres-1;
 527         if ((yres-1) & 0x100)
 528                 r7 |= 0x02;
 529         if ((yres-1) & 0x200)
 530                 r7 |= 0x40;
 531
 532         par->crtc[VGA_CRTC_V_BLANK_START] = yres + lower - 1;
 533         par->crtc[VGA_CRTC_V_SYNC_START] = yres + lower - 1;
 534         if ((yres + lower - 1) & 0x100)
 535                 r7 |= 0x0C;
 536         if ((yres + lower - 1) & 0x200) {
 537                 par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20;
 538                 r7 |= 0x80;
 539         }
 540
 541         /* disabled IRQ */
 542         par->crtc[VGA_CRTC_V_SYNC_END] =
 543                 ((yres + lower - 1 + vslen) & 0x0F) & ~0x10;
 544         /* 0x7F for VGA, but some SVGA chips require all 8 bits to be set */
 545         par->crtc[VGA_CRTC_V_BLANK_END] = (yres + lower - 1 + vslen) & 0xFF;
 546
 547         par->crtc[VGA_CRTC_UNDERLINE] = 0x00;
 548         par->crtc[VGA_CRTC_MODE] = 0xC3 ;
 549         par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF;
 550         par->crtc[VGA_CRTC_OVERFLOW] = r7;
 551
 552         par->vss = 0x00;        /* 3DA */
 553
 554         for (i = 0x00; i < 0x10; i++)
 555                 par->atc[i] = i;
 556         par->atc[VGA_ATC_MODE] = 0x81;
 557         par->atc[VGA_ATC_OVERSCAN] = 0x00;      /* 0 for EGA, 0xFF for VGA */
 558         par->atc[VGA_ATC_PLANE_ENABLE] = 0x0F;
 559         par->atc[VGA_ATC_COLOR_PAGE] = 0x00;
 560
 561         par->misc = 0xC3;
 562         if (var->sync & FB_SYNC_HOR_HIGH_ACT)
 563                 par->misc &= ~0x40;
 564         if (var->sync & FB_SYNC_VERT_HIGH_ACT)
 565                 par->misc &= ~0x80;
 566
 567         par->seq[VGA_SEQ_CLOCK_MODE] = 0x01;
 568         par->seq[VGA_SEQ_PLANE_WRITE] = 0x0F;
 569         par->seq[VGA_SEQ_CHARACTER_MAP] = 0x00;
 570         par->seq[VGA_SEQ_MEMORY_MODE] = 0x06;
 571
 572         par->gdc[VGA_GFX_SR_VALUE] = 0x00;
 573         par->gdc[VGA_GFX_SR_ENABLE] = 0x00;
 574         par->gdc[VGA_GFX_COMPARE_VALUE] = 0x00;
 575         par->gdc[VGA_GFX_DATA_ROTATE] = 0x00;
 576         par->gdc[VGA_GFX_PLANE_READ] = 0;
 577         par->gdc[VGA_GFX_MODE] = 0x02;
 578         par->gdc[VGA_GFX_MISC] = 0x05;
 579         par->gdc[VGA_GFX_COMPARE_MASK] = 0x0F;
 580         par->gdc[VGA_GFX_BIT_MASK] = 0xFF;
 581
 582         base = (yoffset * vxres + (xoffset & ~7)) >> 2;
 583         switch (bpp) {
 584         case 8:
 585                 par->crtc[VGA_CRTC_OFFSET] = vxres >> 3;
 586                 par->ext_offset = vxres >> 11;
 587                 par->pixelpipe_cfg1 = DISPLAY_8BPP_MODE;
 588                 par->bitblt_cntl = COLEXP_8BPP;
 589                 break;
 590         case 15: /* 0rrrrrgg gggbbbbb */
 591         case 16: /* rrrrrggg gggbbbbb */
 592                 par->pixelpipe_cfg1 = (var->green.length == 6) ?
 593                         DISPLAY_16BPP_MODE : DISPLAY_15BPP_MODE;
 594                 par->crtc[VGA_CRTC_OFFSET] = vxres >> 2;
 595                 par->ext_offset = vxres >> 10;
 596                 par->bitblt_cntl = COLEXP_16BPP;
 597                 base *= 2;
 598                 break;
 599         case 24:
 600                 par->crtc[VGA_CRTC_OFFSET] = (vxres * 3) >> 3;
 601                 par->ext_offset = (vxres * 3) >> 11;
 602                 par->pixelpipe_cfg1 = DISPLAY_24BPP_MODE;
 603                 par->bitblt_cntl = COLEXP_24BPP;
 604                 base &= 0xFFFFFFFE; /* ...ignore the last bit. */
 605                 base *= 3;
 606                 break;
 607         case 32:
 608                 par->crtc[VGA_CRTC_OFFSET] = vxres >> 1;
 609                 par->ext_offset = vxres >> 9;
 610                 par->pixelpipe_cfg1 = DISPLAY_32BPP_MODE;
 611                 par->bitblt_cntl = COLEXP_RESERVED; /* Unimplemented on i740 */
 612                 base *= 4;
 613                 break;
 614         }
 615
 616         par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
 617         par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >>  8;
 618         par->ext_start_addr =
 619                 ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
 620         par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
 621
 622         par->pixelpipe_cfg0 = DAC_8_BIT;
 623
 624         par->pixelpipe_cfg2 = DISPLAY_GAMMA_ENABLE | OVERLAY_GAMMA_ENABLE;
 625         par->io_cntl = EXTENDED_CRTC_CNTL;
 626         par->address_mapping = LINEAR_MODE_ENABLE | PAGE_MAPPING_ENABLE;
 627         par->display_cntl = HIRES_MODE;
 628
 629         /* Set the MCLK freq */
 630         par->pll_cntl = PLL_MEMCLK_100000KHZ; /* 100 MHz -- use as default */
 631
 632         /* Calculate the extended CRTC regs */
 633         par->ext_vert_total = (ytotal - 2) >> 8;
 634         par->ext_vert_disp_end = (yres - 1) >> 8;
 635         par->ext_vert_sync_start = (yres + lower) >> 8;
 636         par->ext_vert_blank_start = (yres + lower) >> 8;
 637         par->ext_horiz_total = ((xtotal >> 3) - 5) >> 8;
 638         par->ext_horiz_blank = (((xres + right) >> 3) & 0x40) >> 6;
 639
 640         par->interlace_cntl = INTERLACE_DISABLE;
 641
 642         /* Set the overscan color to 0. (NOTE: This only affects >8bpp mode) */
 643         par->atc[VGA_ATC_OVERSCAN] = 0;
 644
 645         /* Calculate VCLK that most closely matches the requested dot clock */
 646         i740_calc_vclk((((u32)1e9) / var->pixclock) * (u32)(1e3), par);
 647
 648         /* Since we program the clocks ourselves, always use VCLK2. */
 649         par->misc |= 0x0C;
 650
 651         /* Calculate the FIFO Watermark and Burst Length. */
 652         par->lmi_fifo_watermark =
 653                 i740_calc_fifo(par, 1000000 / var->pixclock, bpp);
 654
 655         return 0;
 656 }
 657
 658 static int i740fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 659 {
 660         switch (var->bits_per_pixel) {
 661         case 8:
 662                 var->red.offset = var->green.offset = var->blue.offset = 0;
 663                 var->red.length = var->green.length = var->blue.length = 8;
 664                 break;
 665         case 16:
 666                 switch (var->green.length) {
 667                 default:
 668                 case 5:
 669                         var->red.offset = 10;
 670                         var->green.offset = 5;
 671                         var->blue.offset = 0;
 672                         var->red.length = 5;
 673                         var->green.length = 5;
 674                         var->blue.length = 5;
 675                         break;
 676                 case 6:
 677                         var->red.offset = 11;
 678                         var->green.offset = 5;
 679                         var->blue.offset = 0;
 680                         var->red.length = var->blue.length = 5;
 681                         break;
 682                 }
 683                 break;
 684         case 24:
 685                 var->red.offset = 16;
 686                 var->green.offset = 8;
 687                 var->blue.offset = 0;
 688                 var->red.length = var->green.length = var->blue.length = 8;
 689                 break;
 690         case 32:
 691                 var->transp.offset = 24;
 692                 var->red.offset = 16;
 693                 var->green.offset = 8;
 694                 var->blue.offset = 0;
 695                 var->transp.length = 8;
 696                 var->red.length = var->green.length = var->blue.length = 8;
 697                 break;
 698         default:
 699                 return -EINVAL;
 700         }
 701
 702         if (var->xres > var->xres_virtual)
 703                 var->xres_virtual = var->xres;
 704
 705         if (var->yres > var->yres_virtual)
 706                 var->yres_virtual = var->yres;
 707
 708         if (info->monspecs.hfmax && info->monspecs.vfmax &&
 709             info->monspecs.dclkmax && fb_validate_mode(var, info) < 0)
 710                 return -EINVAL;
 711
 712         return 0;
 713 }
 714
 715 static void vga_protect(struct i740fb_par *par)
 716 {
 717         /* disable the display */
 718         i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0x20, 0x20);
 719
 720         i740inb(par, 0x3DA);
 721         i740outb(par, VGA_ATT_W, 0x00); /* enable palette access */
 722 }
 723
 724 static void vga_unprotect(struct i740fb_par *par)
 725 {
 726         /* reenable display */
 727         i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0, 0x20);
 728
 729         i740inb(par, 0x3DA);
 730         i740outb(par, VGA_ATT_W, 0x20); /* disable palette access */
 731 }
 732
 733 static int i740fb_set_par(struct fb_info *info)
 734 {
 735         struct i740fb_par *par = info->par;
 736         u32 itemp;
 737         int i;
 738
 739         i = i740fb_decode_var(&info->var, par, info);
 740         if (i)
 741                 return i;
 742
 743         memset(info->screen_base, 0, info->screen_size);
 744
 745         vga_protect(par);
 746
 747         i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_DISABLE);
 748
 749         mdelay(1);
 750
 751         i740outreg(par, XRX, VCLK2_VCO_M, par->video_clk2_m);
 752         i740outreg(par, XRX, VCLK2_VCO_N, par->video_clk2_n);
 753         i740outreg(par, XRX, VCLK2_VCO_MN_MSBS, par->video_clk2_mn_msbs);
 754         i740outreg(par, XRX, VCLK2_VCO_DIV_SEL, par->video_clk2_div_sel);
 755
 756         i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0,
 757                         par->pixelpipe_cfg0 & DAC_8_BIT, 0x80);
 758
 759         i740inb(par, 0x3DA);
 760         i740outb(par, 0x3C0, 0x00);
 761
 762         /* update misc output register */
 763         i740outb(par, VGA_MIS_W, par->misc | 0x01);
 764
 765         /* synchronous reset on */
 766         i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x01);
 767         /* write sequencer registers */
 768         i740outreg(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE,
 769                         par->seq[VGA_SEQ_CLOCK_MODE] | 0x20);
 770         for (i = 2; i < VGA_SEQ_C; i++)
 771                 i740outreg(par, VGA_SEQ_I, i, par->seq[i]);
 772
 773         /* synchronous reset off */
 774         i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x03);
 775
 776         /* deprotect CRT registers 0-7 */
 777         i740outreg(par, VGA_CRT_IC, VGA_CRTC_V_SYNC_END,
 778                         par->crtc[VGA_CRTC_V_SYNC_END]);
 779
 780         /* write CRT registers */
 781         for (i = 0; i < VGA_CRT_C; i++)
 782                 i740outreg(par, VGA_CRT_IC, i, par->crtc[i]);
 783
 784         /* write graphics controller registers */
 785         for (i = 0; i < VGA_GFX_C; i++)
 786                 i740outreg(par, VGA_GFX_I, i, par->gdc[i]);
 787
 788         /* write attribute controller registers */
 789         for (i = 0; i < VGA_ATT_C; i++) {
 790                 i740inb(par, VGA_IS1_RC);               /* reset flip-flop */
 791                 i740outb(par, VGA_ATT_IW, i);
 792                 i740outb(par, VGA_ATT_IW, par->atc[i]);
 793         }
 794
 795         i740inb(par, VGA_IS1_RC);
 796         i740outb(par, VGA_ATT_IW, 0x20);
 797
 798         i740outreg(par, VGA_CRT_IC, EXT_VERT_TOTAL, par->ext_vert_total);
 799         i740outreg(par, VGA_CRT_IC, EXT_VERT_DISPLAY, par->ext_vert_disp_end);
 800         i740outreg(par, VGA_CRT_IC, EXT_VERT_SYNC_START,
 801                         par->ext_vert_sync_start);
 802         i740outreg(par, VGA_CRT_IC, EXT_VERT_BLANK_START,
 803                         par->ext_vert_blank_start);
 804         i740outreg(par, VGA_CRT_IC, EXT_HORIZ_TOTAL, par->ext_horiz_total);
 805         i740outreg(par, VGA_CRT_IC, EXT_HORIZ_BLANK, par->ext_horiz_blank);
 806         i740outreg(par, VGA_CRT_IC, EXT_OFFSET, par->ext_offset);
 807         i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI, par->ext_start_addr_hi);
 808         i740outreg(par, VGA_CRT_IC, EXT_START_ADDR, par->ext_start_addr);
 809
 810         i740outreg_mask(par, VGA_CRT_IC, INTERLACE_CNTL,
 811                         par->interlace_cntl, INTERLACE_ENABLE);
 812         i740outreg_mask(par, XRX, ADDRESS_MAPPING, par->address_mapping, 0x1F);
 813         i740outreg_mask(par, XRX, BITBLT_CNTL, par->bitblt_cntl, COLEXP_MODE);
 814         i740outreg_mask(par, XRX, DISPLAY_CNTL,
 815                         par->display_cntl, VGA_WRAP_MODE | GUI_MODE);
 816         i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0, par->pixelpipe_cfg0, 0x9B);
 817         i740outreg_mask(par, XRX, PIXPIPE_CONFIG_2, par->pixelpipe_cfg2, 0x0C);
 818
 819         i740outreg(par, XRX, PLL_CNTL, par->pll_cntl);
 820
 821         i740outreg_mask(par, XRX, PIXPIPE_CONFIG_1,
 822                         par->pixelpipe_cfg1, DISPLAY_COLOR_MODE);
 823
 824         itemp = readl(par->regs + FWATER_BLC);
 825         itemp &= ~(LMI_BURST_LENGTH | LMI_FIFO_WATERMARK);
 826         itemp |= par->lmi_fifo_watermark;
 827         writel(itemp, par->regs + FWATER_BLC);
 828
 829         i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_60HZ);
 830
 831         i740outreg_mask(par, MRX, COL_KEY_CNTL_1, 0, BLANK_DISP_OVERLAY);
 832         i740outreg_mask(par, XRX, IO_CTNL,
 833                         par->io_cntl, EXTENDED_ATTR_CNTL | EXTENDED_CRTC_CNTL);
 834
 835         if (par->pixelpipe_cfg1 != DISPLAY_8BPP_MODE) {
 836                 i740outb(par, VGA_PEL_MSK, 0xFF);
 837                 i740outb(par, VGA_PEL_IW, 0x00);
 838                 for (i = 0; i < 256; i++) {
 839                         itemp = (par->pixelpipe_cfg0 & DAC_8_BIT) ? i : i >> 2;
 840                         i740outb(par, VGA_PEL_D, itemp);
 841                         i740outb(par, VGA_PEL_D, itemp);
 842                         i740outb(par, VGA_PEL_D, itemp);
 843                 }
 844         }
 845
 846         /* Wait for screen to stabilize. */
 847         mdelay(50);
 848         vga_unprotect(par);
 849
 850         info->fix.line_length =
 851                         info->var.xres_virtual * info->var.bits_per_pixel / 8;
 852         if (info->var.bits_per_pixel == 8)
 853                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 854         else
 855                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 856
 857         return 0;
 858 }
 859
 860 static int i740fb_setcolreg(unsigned regno, unsigned red, unsigned green,
 861                            unsigned blue, unsigned transp,
 862                            struct fb_info *info)
 863 {
 864         u32 r, g, b;
 865
 866         dev_dbg(info->device, "setcolreg: regno: %i, red=%d, green=%d, blue=%d, transp=%d, bpp=%d\n",
 867                 regno, red, green, blue, transp, info->var.bits_per_pixel);
 868
 869         switch (info->fix.visual) {
 870         case FB_VISUAL_PSEUDOCOLOR:
 871                 if (regno >= 256)
 872                         return -EINVAL;
 873                 i740outb(info->par, VGA_PEL_IW, regno);
 874                 i740outb(info->par, VGA_PEL_D, red >> 8);
 875                 i740outb(info->par, VGA_PEL_D, green >> 8);
 876                 i740outb(info->par, VGA_PEL_D, blue >> 8);
 877                 break;
 878         case FB_VISUAL_TRUECOLOR:
 879                 if (regno >= 16)
 880                         return -EINVAL;
 881                 r = (red >> (16 - info->var.red.length))
 882                         << info->var.red.offset;
 883                 b = (blue >> (16 - info->var.blue.length))
 884                         << info->var.blue.offset;
 885                 g = (green >> (16 - info->var.green.length))
 886                         << info->var.green.offset;
 887                 ((u32 *) info->pseudo_palette)[regno] = r | g | b;
 888                 break;
 889         default:
 890                 return -EINVAL;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static int i740fb_pan_display(struct fb_var_screeninfo *var,
 897                                  struct fb_info *info)
 898 {
 899         struct i740fb_par *par = info->par;
 900         u32 base = (var->yoffset * info->var.xres_virtual
 901                  + (var->xoffset & ~7)) >> 2;
 902
 903         dev_dbg(info->device, "pan_display: xoffset: %i yoffset: %i base: %i\n",
 904                 var->xoffset, var->yoffset, base);
 905
 906         switch (info->var.bits_per_pixel) {
 907         case 8:
 908                 break;
 909         case 15:
 910         case 16:
 911                 base *= 2;
 912                 break;
 913         case 24:
 914                 /*
 915                  * The last bit does not seem to have any effect on the start
 916                  * address register in 24bpp mode, so...
 917                  */
 918                 base &= 0xFFFFFFFE; /* ...ignore the last bit. */
 919                 base *= 3;
 920                 break;
 921         case 32:
 922                 base *= 4;
 923                 break;
 924         }
 925
 926         par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF;
 927         par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >>  8;
 928         par->ext_start_addr_hi = (base & 0x3FC00000) >> 22;
 929         par->ext_start_addr =
 930                         ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE;
 931
 932         i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_LO,  base & 0x000000FF);
 933         i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_HI,
 934                         (base & 0x0000FF00) >> 8);
 935         i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI,
 936                         (base & 0x3FC00000) >> 22);
 937         i740outreg(par, VGA_CRT_IC, EXT_START_ADDR,
 938                         ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE);
 939
 940         return 0;
 941 }
 942
 943 static int i740fb_blank(int blank_mode, struct fb_info *info)
 944 {
 945         struct i740fb_par *par = info->par;
 946
 947         unsigned char SEQ01;
 948         int DPMSSyncSelect;
 949
 950         switch (blank_mode) {
 951         case FB_BLANK_UNBLANK:
 952         case FB_BLANK_NORMAL:
 953                 SEQ01 = 0x00;
 954                 DPMSSyncSelect = HSYNC_ON | VSYNC_ON;
 955                 break;
 956         case FB_BLANK_VSYNC_SUSPEND:
 957                 SEQ01 = 0x20;
 958                 DPMSSyncSelect = HSYNC_ON | VSYNC_OFF;
 959                 break;
 960         case FB_BLANK_HSYNC_SUSPEND:
 961                 SEQ01 = 0x20;
 962                 DPMSSyncSelect = HSYNC_OFF | VSYNC_ON;
 963                 break;
 964         case FB_BLANK_POWERDOWN:
 965                 SEQ01 = 0x20;
 966                 DPMSSyncSelect = HSYNC_OFF | VSYNC_OFF;
 967                 break;
 968         default:
 969                 return -EINVAL;
 970         }
 971         /* Turn the screen on/off */
 972         i740outb(par, SRX, 0x01);
 973         SEQ01 |= i740inb(par, SRX + 1) & ~0x20;
 974         i740outb(par, SRX, 0x01);
 975         i740outb(par, SRX + 1, SEQ01);
 976
 977         /* Set the DPMS mode */
 978         i740outreg(par, XRX, DPMS_SYNC_SELECT, DPMSSyncSelect);
 979
 980         /* Let fbcon do a soft blank for us */
 981         return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
 982 }
 983
 984 static struct fb_ops i740fb_ops = {
 985         .owner          = THIS_MODULE,
 986         .fb_open        = i740fb_open,
 987         .fb_release     = i740fb_release,
 988         .fb_check_var   = i740fb_check_var,
 989         .fb_set_par     = i740fb_set_par,
 990         .fb_setcolreg   = i740fb_setcolreg,
 991         .fb_blank       = i740fb_blank,
 992         .fb_pan_display = i740fb_pan_display,
 993         .fb_fillrect    = cfb_fillrect,
 994         .fb_copyarea    = cfb_copyarea,
 995         .fb_imageblit   = cfb_imageblit,
 996 };
 997
 998 /* ------------------------------------------------------------------------- */
 999
1000 static int i740fb_probe(struct pci_dev *dev, const struct pci_device_id *ent)
1001 {
1002         struct fb_info *info;
1003         struct i740fb_par *par;
1004         int ret, tmp;
1005         bool found = false;
1006         u8 *edid;
1007
1008         info = framebuffer_alloc(sizeof(struct i740fb_par), &(dev->dev));
1009         if (!info) {
1010                 dev_err(&(dev->dev), "cannot allocate framebuffer\n");
1011                 return -ENOMEM;
1012         }
1013
1014         par = info->par;
1015         mutex_init(&par->open_lock);
1016
1017         info->var.activate = FB_ACTIVATE_NOW;
1018         info->var.bits_per_pixel = 8;
1019         info->fbops = &i740fb_ops;
1020         info->pseudo_palette = par->pseudo_palette;
1021
1022         ret = pci_enable_device(dev);
1023         if (ret) {
1024                 dev_err(info->device, "cannot enable PCI device\n");
1025                 goto err_enable_device;
1026         }
1027
1028         ret = pci_request_regions(dev, info->fix.id);
1029         if (ret) {
1030                 dev_err(info->device, "error requesting regions\n");
1031                 goto err_request_regions;
1032         }
1033
1034         info->screen_base = pci_ioremap_wc_bar(dev, 0);
1035         if (!info->screen_base) {
1036                 dev_err(info->device, "error remapping base\n");
1037                 ret = -ENOMEM;
1038                 goto err_ioremap_1;
1039         }
1040
1041         par->regs = pci_ioremap_bar(dev, 1);
1042         if (!par->regs) {
1043                 dev_err(info->device, "error remapping MMIO\n");
1044                 ret = -ENOMEM;
1045                 goto err_ioremap_2;
1046         }
1047
1048         /* detect memory size */
1049         if ((i740inreg(par, XRX, DRAM_ROW_TYPE) & DRAM_ROW_1)
1050                                                         == DRAM_ROW_1_SDRAM)
1051                 i740outb(par, XRX, DRAM_ROW_BNDRY_1);
1052         else
1053                 i740outb(par, XRX, DRAM_ROW_BNDRY_0);
1054         info->screen_size = i740inb(par, XRX + 1) * 1024 * 1024;
1055         /* detect memory type */
1056         tmp = i740inreg(par, XRX, DRAM_ROW_CNTL_LO);
1057         par->has_sgram = !((tmp & DRAM_RAS_TIMING) ||
1058                            (tmp & DRAM_RAS_PRECHARGE));
1059
1060         fb_info(info, "Intel740 on %s, %ld KB %s\n",
1061                 pci_name(dev), info->screen_size >> 10,
1062                 par->has_sgram ? "SGRAM" : "SDRAM");
1063
1064         info->fix = i740fb_fix;
1065         info->fix.mmio_start = pci_resource_start(dev, 1);
1066         info->fix.mmio_len = pci_resource_len(dev, 1);
1067         info->fix.smem_start = pci_resource_start(dev, 0);
1068         info->fix.smem_len = info->screen_size;
1069         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1070
1071         if (i740fb_setup_ddc_bus(info) == 0) {
1072                 par->ddc_registered = true;
1073                 edid = fb_ddc_read(&par->ddc_adapter);
1074                 if (edid) {
1075                         fb_edid_to_monspecs(edid, &info->monspecs);
1076                         kfree(edid);
1077                         if (!info->monspecs.modedb)
1078                                 dev_err(info->device,
1079                                         "error getting mode database\n");
1080                         else {
1081                                 const struct fb_videomode *m;
1082
1083                                 fb_videomode_to_modelist(
1084                                         info->monspecs.modedb,
1085                                         info->monspecs.modedb_len,
1086                                         &info->modelist);
1087                                 m = fb_find_best_display(&info->monspecs,
1088                                                          &info->modelist);
1089                                 if (m) {
1090                                         fb_videomode_to_var(&info->var, m);
1091                                         /* fill all other info->var's fields */
1092                                         if (!i740fb_check_var(&info->var, info))
1093                                                 found = true;
1094                                 }
1095                         }
1096                 }
1097         }
1098
1099         if (!mode_option && !found)
1100                 mode_option = "640x480-8@60";
1101
1102         if (mode_option) {
1103                 ret = fb_find_mode(&info->var, info, mode_option,
1104                                    info->monspecs.modedb,
1105                                    info->monspecs.modedb_len,
1106                                    NULL, info->var.bits_per_pixel);
1107                 if (!ret || ret == 4) {
1108                         dev_err(info->device, "mode %s not found\n",
1109                                 mode_option);
1110                         ret = -EINVAL;
1111                 }
1112         }
1113
1114         fb_destroy_modedb(info->monspecs.modedb);
1115         info->monspecs.modedb = NULL;
1116
1117         /* maximize virtual vertical size for fast scrolling */
1118         info->var.yres_virtual = info->fix.smem_len * 8 /
1119                         (info->var.bits_per_pixel * info->var.xres_virtual);
1120
1121         if (ret == -EINVAL)
1122                 goto err_find_mode;
1123
1124         ret = fb_alloc_cmap(&info->cmap, 256, 0);
1125         if (ret) {
1126                 dev_err(info->device, "cannot allocate colormap\n");
1127                 goto err_alloc_cmap;
1128         }
1129
1130         ret = register_framebuffer(info);
1131         if (ret) {
1132                 dev_err(info->device, "error registering framebuffer\n");
1133                 goto err_reg_framebuffer;
1134         }
1135
1136         fb_info(info, "%s frame buffer device\n", info->fix.id);
1137         pci_set_drvdata(dev, info);
1138         if (mtrr)
1139                 par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
1140                                                   info->fix.smem_len);
1141         return 0;
1142
1143 err_reg_framebuffer:
1144         fb_dealloc_cmap(&info->cmap);
1145 err_alloc_cmap:
1146 err_find_mode:
1147         if (par->ddc_registered)
1148                 i2c_del_adapter(&par->ddc_adapter);
1149         pci_iounmap(dev, par->regs);
1150 err_ioremap_2:
1151         pci_iounmap(dev, info->screen_base);
1152 err_ioremap_1:
1153         pci_release_regions(dev);
1154 err_request_regions:
1155 /*      pci_disable_device(dev); */
1156 err_enable_device:
1157         framebuffer_release(info);
1158         return ret;
1159 }
1160
1161 static void i740fb_remove(struct pci_dev *dev)
1162 {
1163         struct fb_info *info = pci_get_drvdata(dev);
1164
1165         if (info) {
1166                 struct i740fb_par *par = info->par;
1167                 arch_phys_wc_del(par->wc_cookie);
1168                 unregister_framebuffer(info);
1169                 fb_dealloc_cmap(&info->cmap);
1170                 if (par->ddc_registered)
1171                         i2c_del_adapter(&par->ddc_adapter);
1172                 pci_iounmap(dev, par->regs);
1173                 pci_iounmap(dev, info->screen_base);
1174                 pci_release_regions(dev);
1175 /*              pci_disable_device(dev); */
1176                 framebuffer_release(info);
1177         }
1178 }
1179
1180 #ifdef CONFIG_PM
1181 static int i740fb_suspend(struct pci_dev *dev, pm_message_t state)
1182 {
1183         struct fb_info *info = pci_get_drvdata(dev);
1184         struct i740fb_par *par = info->par;
1185
1186         /* don't disable console during hibernation and wakeup from it */
1187         if (state.event == PM_EVENT_FREEZE || state.event == PM_EVENT_PRETHAW)
1188                 return 0;
1189
1190         console_lock();
1191         mutex_lock(&(par->open_lock));
1192
1193         /* do nothing if framebuffer is not active */
1194         if (par->ref_count == 0) {
1195                 mutex_unlock(&(par->open_lock));
1196                 console_unlock();
1197                 return 0;
1198         }
1199
1200         fb_set_suspend(info, 1);
1201
1202         pci_save_state(dev);
1203         pci_disable_device(dev);
1204         pci_set_power_state(dev, pci_choose_state(dev, state));
1205
1206         mutex_unlock(&(par->open_lock));
1207         console_unlock();
1208
1209         return 0;
1210 }
1211
1212 static int i740fb_resume(struct pci_dev *dev)
1213 {
1214         struct fb_info *info = pci_get_drvdata(dev);
1215         struct i740fb_par *par = info->par;
1216
1217         console_lock();
1218         mutex_lock(&(par->open_lock));
1219
1220         if (par->ref_count == 0)
1221                 goto fail;
1222
1223         pci_set_power_state(dev, PCI_D0);
1224         pci_restore_state(dev);
1225         if (pci_enable_device(dev))
1226                 goto fail;
1227
1228         i740fb_set_par(info);
1229         fb_set_suspend(info, 0);
1230
1231 fail:
1232         mutex_unlock(&(par->open_lock));
1233         console_unlock();
1234         return 0;
1235 }
1236 #else
1237 #define i740fb_suspend NULL
1238 #define i740fb_resume NULL
1239 #endif /* CONFIG_PM */
1240
1241 #define I740_ID_PCI 0x00d1
1242 #define I740_ID_AGP 0x7800
1243
1244 static const struct pci_device_id i740fb_id_table[] = {
1245         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_PCI) },
1246         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_AGP) },
1247         { 0 }
1248 };
1249 MODULE_DEVICE_TABLE(pci, i740fb_id_table);
1250
1251 static struct pci_driver i740fb_driver = {
1252         .name           = "i740fb",
1253         .id_table       = i740fb_id_table,
1254         .probe          = i740fb_probe,
1255         .remove         = i740fb_remove,
1256         .suspend        = i740fb_suspend,
1257         .resume         = i740fb_resume,
1258 };
1259
1260 #ifndef MODULE
1261 static int  __init i740fb_setup(char *options)
1262 {
1263         char *opt;
1264
1265         if (!options || !*options)
1266                 return 0;
1267
1268         while ((opt = strsep(&options, ",")) != NULL) {
1269                 if (!*opt)
1270                         continue;
1271                 else if (!strncmp(opt, "mtrr:", 5))
1272                         mtrr = simple_strtoul(opt + 5, NULL, 0);
1273                 else
1274                         mode_option = opt;
1275         }
1276
1277         return 0;
1278 }
1279 #endif
1280
1281 static int __init i740fb_init(void)
1282 {
1283 #ifndef MODULE
1284         char *option = NULL;
1285
1286         if (fb_get_options("i740fb", &option))
1287                 return -ENODEV;
1288         i740fb_setup(option);
1289 #endif
1290
1291         return pci_register_driver(&i740fb_driver);
1292 }
1293
1294 static void __exit i740fb_exit(void)
1295 {
1296         pci_unregister_driver(&i740fb_driver);
1297 }
1298
1299 module_init(i740fb_init);
1300 module_exit(i740fb_exit);
1301
1302 MODULE_AUTHOR("(c) 2011 Ondrej Zary <linux@rainbow-software.org>");
1303 MODULE_LICENSE("GPL");
1304 MODULE_DESCRIPTION("fbdev driver for Intel740");
1305
1306 module_param(mode_option, charp, 0444);
1307 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
1308
1309 module_param(mtrr, int, 0444);
1310 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");