drivers/staging/sm750fb/sm750.c

   1 #include <linux/kernel.h>
   2 #include <linux/module.h>
   3 #include <linux/errno.h>
   4 #include <linux/string.h>
   5 #include <linux/mm.h>
   6 #include <linux/slab.h>
   7 #include <linux/delay.h>
   8 #include <linux/fb.h>
   9 #include <linux/ioport.h>
  10 #include <linux/init.h>
  11 #include <linux/pci.h>
  12 #include <linux/mm_types.h>
  13 #include <linux/vmalloc.h>
  14 #include <linux/pagemap.h>
  15 #include <linux/screen_info.h>
  16 #include <linux/vmalloc.h>
  17 #include <linux/pagemap.h>
  18 #include <linux/console.h>
  19 #include <asm/fb.h>
  20 #include "sm750.h"
  21 #include "sm750_accel.h"
  22 #include "sm750_cursor.h"
  23
  24 /*
  25  * #ifdef __BIG_ENDIAN
  26  * ssize_t lynxfb_ops_write(struct fb_info *info, const char __user *buf,
  27  * size_t count, loff_t *ppos);
  28  * ssize_t lynxfb_ops_read(struct fb_info *info, char __user *buf,
  29  * size_t count, loff_t *ppos);
  30  * #endif
  31  */
  32
  33 /* common var for all device */
  34 static int g_hwcursor = 1;
  35 static int g_noaccel;
  36 static int g_nomtrr;
  37 static const char *g_fbmode[] = {NULL, NULL};
  38 static const char *g_def_fbmode = "800x600-16@60";
  39 static char *g_settings;
  40 static int g_dualview;
  41 static char *g_option;
  42
  43 static const struct fb_videomode lynx750_ext[] = {
  44         /*      1024x600-60 VESA        [1.71:1] */
  45         {NULL,  60, 1024, 600, 20423, 144,  40, 18, 1, 104, 3,
  46          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  47          FB_VMODE_NONINTERLACED},
  48
  49         /*      1024x600-70 VESA */
  50         {NULL,  70, 1024, 600, 17211, 152,  48, 21, 1, 104, 3,
  51          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  52          FB_VMODE_NONINTERLACED},
  53
  54         /*      1024x600-75 VESA */
  55         {NULL,  75, 1024, 600, 15822, 160,  56, 23, 1, 104, 3,
  56          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  57          FB_VMODE_NONINTERLACED},
  58
  59         /*      1024x600-85 VESA */
  60         {NULL,  85, 1024, 600, 13730, 168,  56, 26, 1, 112, 3,
  61          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  62          FB_VMODE_NONINTERLACED},
  63
  64         /*      720x480 */
  65         {NULL, 60,  720,  480,  37427, 88,   16, 13, 1,   72,  3,
  66          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  67          FB_VMODE_NONINTERLACED},
  68
  69         /*      1280x720                [1.78:1]        */
  70         {NULL, 60,  1280,  720,  13426, 162, 86, 22, 1,  136, 3,
  71          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  72          FB_VMODE_NONINTERLACED},
  73
  74         /*      1280x768@60 */
  75         {NULL, 60, 1280, 768, 12579, 192, 64, 20, 3, 128, 7,
  76          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  77          FB_VMODE_NONINTERLACED},
  78
  79         /*      1360 x 768      [1.77083:1]     */
  80         {NULL,  60, 1360, 768, 11804, 208,  64, 23, 1, 144, 3,
  81          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  82          FB_VMODE_NONINTERLACED},
  83
  84         /*      1368 x 768      [1.78:1]        */
  85         {NULL, 60,  1368,  768,  11647, 216, 72, 23, 1,  144, 3,
  86          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  87          FB_VMODE_NONINTERLACED},
  88
  89         /*      1440 x 900              [16:10] */
  90         {NULL, 60, 1440, 900, 9392, 232, 80, 28, 1, 152, 3,
  91          FB_SYNC_VERT_HIGH_ACT,
  92          FB_VMODE_NONINTERLACED},
  93
  94         /*      1440x960                [15:10] */
  95         {NULL, 60, 1440, 960, 8733, 240, 88, 30, 1, 152, 3,
  96          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  97          FB_VMODE_NONINTERLACED},
  98
  99         /*      1920x1080       [16:9]  */
 100         {NULL, 60, 1920, 1080, 6734, 148, 88, 41, 1, 44, 3,
 101          FB_SYNC_VERT_HIGH_ACT,
 102          FB_VMODE_NONINTERLACED},
 103 };
 104
 105
 106 /* no hardware cursor supported under version 2.6.10, kernel bug */
 107 static int lynxfb_ops_cursor(struct fb_info *info, struct fb_cursor *fbcursor)
 108 {
 109         struct lynxfb_par *par;
 110         struct lynxfb_crtc *crtc;
 111         struct lynx_cursor *cursor;
 112
 113         par = info->par;
 114         crtc = &par->crtc;
 115         cursor = &crtc->cursor;
 116
 117         if (fbcursor->image.width > cursor->maxW ||
 118            fbcursor->image.height > cursor->maxH ||
 119            fbcursor->image.depth > 1) {
 120                 return -ENXIO;
 121         }
 122
 123         hw_cursor_disable(cursor);
 124         if (fbcursor->set & FB_CUR_SETSIZE)
 125                 hw_cursor_setSize(cursor,
 126                                   fbcursor->image.width,
 127                                   fbcursor->image.height);
 128
 129         if (fbcursor->set & FB_CUR_SETPOS)
 130                 hw_cursor_setPos(cursor,
 131                                  fbcursor->image.dx - info->var.xoffset,
 132                                  fbcursor->image.dy - info->var.yoffset);
 133
 134         if (fbcursor->set & FB_CUR_SETCMAP) {
 135                 /* get the 16bit color of kernel means */
 136                 u16 fg, bg;
 137
 138                 fg = ((info->cmap.red[fbcursor->image.fg_color] & 0xf800)) |
 139                       ((info->cmap.green[fbcursor->image.fg_color] & 0xfc00) >> 5) |
 140                       ((info->cmap.blue[fbcursor->image.fg_color] & 0xf800) >> 11);
 141
 142                 bg = ((info->cmap.red[fbcursor->image.bg_color] & 0xf800)) |
 143                       ((info->cmap.green[fbcursor->image.bg_color] & 0xfc00) >> 5) |
 144                       ((info->cmap.blue[fbcursor->image.bg_color] & 0xf800) >> 11);
 145
 146                 hw_cursor_setColor(cursor, fg, bg);
 147         }
 148
 149         if (fbcursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
 150                 hw_cursor_setData(cursor,
 151                                   fbcursor->rop,
 152                                   fbcursor->image.data,
 153                                   fbcursor->mask);
 154         }
 155
 156         if (fbcursor->enable)
 157                 hw_cursor_enable(cursor);
 158
 159         return 0;
 160 }
 161
 162 static void lynxfb_ops_fillrect(struct fb_info *info,
 163                                 const struct fb_fillrect *region)
 164 {
 165         struct lynxfb_par *par;
 166         struct sm750_dev *sm750_dev;
 167         unsigned int base, pitch, Bpp, rop;
 168         u32 color;
 169
 170         if (info->state != FBINFO_STATE_RUNNING)
 171                 return;
 172
 173         par = info->par;
 174         sm750_dev = par->dev;
 175
 176         /*
 177          * each time 2d function begin to work,below three variable always need
 178          * be set, seems we can put them together in some place
 179          */
 180         base = par->crtc.oScreen;
 181         pitch = info->fix.line_length;
 182         Bpp = info->var.bits_per_pixel >> 3;
 183
 184         color = (Bpp == 1) ? region->color :
 185                 ((u32 *)info->pseudo_palette)[region->color];
 186         rop = (region->rop != ROP_COPY) ? HW_ROP2_XOR : HW_ROP2_COPY;
 187
 188         /*
 189          * If not use spin_lock,system will die if user load driver
 190          * and immediately unload driver frequently (dual)
 191          */
 192         if (sm750_dev->dual)
 193                 spin_lock(&sm750_dev->slock);
 194
 195         sm750_dev->accel.de_fillrect(&sm750_dev->accel,
 196                                      base, pitch, Bpp,
 197                                      region->dx, region->dy,
 198                                      region->width, region->height,
 199                                      color, rop);
 200         if (sm750_dev->dual)
 201                 spin_unlock(&sm750_dev->slock);
 202 }
 203
 204 static void lynxfb_ops_copyarea(struct fb_info *info,
 205                                 const struct fb_copyarea *region)
 206 {
 207         struct lynxfb_par *par;
 208         struct sm750_dev *sm750_dev;
 209         unsigned int base, pitch, Bpp;
 210
 211         par = info->par;
 212         sm750_dev = par->dev;
 213
 214         /*
 215          * each time 2d function begin to work,below three variable always need
 216          * be set, seems we can put them together in some place
 217          */
 218         base = par->crtc.oScreen;
 219         pitch = info->fix.line_length;
 220         Bpp = info->var.bits_per_pixel >> 3;
 221
 222         /*
 223          * If not use spin_lock, system will die if user load driver
 224          * and immediately unload driver frequently (dual)
 225          */
 226         if (sm750_dev->dual)
 227                 spin_lock(&sm750_dev->slock);
 228
 229         sm750_dev->accel.de_copyarea(&sm750_dev->accel,
 230                                      base, pitch, region->sx, region->sy,
 231                                      base, pitch, Bpp, region->dx, region->dy,
 232                                      region->width, region->height,
 233                                      HW_ROP2_COPY);
 234         if (sm750_dev->dual)
 235                 spin_unlock(&sm750_dev->slock);
 236 }
 237
 238 static void lynxfb_ops_imageblit(struct fb_info *info,
 239                                  const struct fb_image *image)
 240 {
 241         unsigned int base, pitch, Bpp;
 242         unsigned int fgcol, bgcol;
 243         struct lynxfb_par *par;
 244         struct sm750_dev *sm750_dev;
 245
 246         par = info->par;
 247         sm750_dev = par->dev;
 248         /*
 249          * each time 2d function begin to work,below three variable always need
 250          * be set, seems we can put them together in some place
 251          */
 252         base = par->crtc.oScreen;
 253         pitch = info->fix.line_length;
 254         Bpp = info->var.bits_per_pixel >> 3;
 255
 256         /* TODO: Implement hardware acceleration for image->depth > 1 */
 257         if (image->depth != 1) {
 258                 cfb_imageblit(info, image);
 259                 return;
 260         }
 261
 262         if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 263             info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
 264                 fgcol = ((u32 *)info->pseudo_palette)[image->fg_color];
 265                 bgcol = ((u32 *)info->pseudo_palette)[image->bg_color];
 266         } else {
 267                 fgcol = image->fg_color;
 268                 bgcol = image->bg_color;
 269         }
 270
 271         /*
 272          * If not use spin_lock, system will die if user load driver
 273          * and immediately unload driver frequently (dual)
 274          */
 275         if (sm750_dev->dual)
 276                 spin_lock(&sm750_dev->slock);
 277
 278         sm750_dev->accel.de_imageblit(&sm750_dev->accel,
 279                                       image->data, image->width >> 3, 0,
 280                                       base, pitch, Bpp,
 281                                       image->dx, image->dy,
 282                                       image->width, image->height,
 283                                       fgcol, bgcol, HW_ROP2_COPY);
 284         if (sm750_dev->dual)
 285                 spin_unlock(&sm750_dev->slock);
 286 }
 287
 288 static int lynxfb_ops_pan_display(struct fb_var_screeninfo *var,
 289                                   struct fb_info *info)
 290 {
 291         struct lynxfb_par *par;
 292         struct lynxfb_crtc *crtc;
 293
 294         if (!info)
 295                 return -EINVAL;
 296
 297         par = info->par;
 298         crtc = &par->crtc;
 299         return hw_sm750_pan_display(crtc, var, info);
 300 }
 301
 302 static int lynxfb_ops_set_par(struct fb_info *info)
 303 {
 304         struct lynxfb_par *par;
 305         struct lynxfb_crtc *crtc;
 306         struct lynxfb_output *output;
 307         struct fb_var_screeninfo *var;
 308         struct fb_fix_screeninfo *fix;
 309         int ret;
 310         unsigned int line_length;
 311
 312         if (!info)
 313                 return -EINVAL;
 314
 315         ret = 0;
 316         par = info->par;
 317         crtc = &par->crtc;
 318         output = &par->output;
 319         var = &info->var;
 320         fix = &info->fix;
 321
 322         /* fix structur is not so FIX ... */
 323         line_length = var->xres_virtual * var->bits_per_pixel / 8;
 324         line_length = ALIGN(line_length, crtc->line_pad);
 325         fix->line_length = line_length;
 326         pr_info("fix->line_length = %d\n", fix->line_length);
 327
 328         /*
 329          * var->red,green,blue,transp are need to be set by driver
 330          * and these data should be set before setcolreg routine
 331          */
 332
 333         switch (var->bits_per_pixel) {
 334         case 8:
 335                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 336                 var->red.offset = 0;
 337                 var->red.length = 8;
 338                 var->green.offset = 0;
 339                 var->green.length = 8;
 340                 var->blue.offset = 0;
 341                 var->blue.length = 8;
 342                 var->transp.length = 0;
 343                 var->transp.offset = 0;
 344                 break;
 345         case 16:
 346                 var->red.offset = 11;
 347                 var->red.length = 5;
 348                 var->green.offset = 5;
 349                 var->green.length = 6;
 350                 var->blue.offset = 0;
 351                 var->blue.length = 5;
 352                 var->transp.length = 0;
 353                 var->transp.offset = 0;
 354                 fix->visual = FB_VISUAL_TRUECOLOR;
 355                 break;
 356         case 24:
 357         case 32:
 358                 var->red.offset = 16;
 359                 var->red.length = 8;
 360                 var->green.offset = 8;
 361                 var->green.length = 8;
 362                 var->blue.offset = 0;
 363                 var->blue.length = 8;
 364                 fix->visual = FB_VISUAL_TRUECOLOR;
 365                 break;
 366         default:
 367                 ret = -EINVAL;
 368                 break;
 369         }
 370         var->height = var->width = -1;
 371         var->accel_flags = 0;/*FB_ACCELF_TEXT;*/
 372
 373         if (ret) {
 374                 pr_err("pixel bpp format not satisfied\n.");
 375                 return ret;
 376         }
 377         ret = hw_sm750_crtc_setMode(crtc, var, fix);
 378         if (!ret)
 379                 ret = hw_sm750_output_setMode(output, var, fix);
 380         return ret;
 381 }
 382
 383 static inline unsigned int chan_to_field(unsigned int chan,
 384                                          struct fb_bitfield *bf)
 385 {
 386         chan &= 0xffff;
 387         chan >>= 16 - bf->length;
 388         return chan << bf->offset;
 389 }
 390
 391 #ifdef CONFIG_PM
 392 static int lynxfb_suspend(struct pci_dev *pdev, pm_message_t mesg)
 393 {
 394         struct fb_info *info;
 395         struct sm750_dev *sm750_dev;
 396         int ret;
 397
 398         if (mesg.event == pdev->dev.power.power_state.event)
 399                 return 0;
 400
 401         ret = 0;
 402         sm750_dev = pci_get_drvdata(pdev);
 403         switch (mesg.event) {
 404         case PM_EVENT_FREEZE:
 405         case PM_EVENT_PRETHAW:
 406                 pdev->dev.power.power_state = mesg;
 407                 return 0;
 408         }
 409
 410         console_lock();
 411         if (mesg.event & PM_EVENT_SLEEP) {
 412                 info = sm750_dev->fbinfo[0];
 413                 if (info)
 414                         /* 1 means do suspend */
 415                         fb_set_suspend(info, 1);
 416                 info = sm750_dev->fbinfo[1];
 417                 if (info)
 418                         /* 1 means do suspend */
 419                         fb_set_suspend(info, 1);
 420
 421                 ret = pci_save_state(pdev);
 422                 if (ret) {
 423                         pr_err("error:%d occurred in pci_save_state\n", ret);
 424                         return ret;
 425                 }
 426
 427                 pci_disable_device(pdev);
 428                 ret = pci_set_power_state(pdev, pci_choose_state(pdev, mesg));
 429                 if (ret) {
 430                         pr_err("error:%d occurred in pci_set_power_state\n", ret);
 431                         return ret;
 432                 }
 433         }
 434
 435         pdev->dev.power.power_state = mesg;
 436         console_unlock();
 437         return ret;
 438 }
 439
 440 static int lynxfb_resume(struct pci_dev *pdev)
 441 {
 442         struct fb_info *info;
 443         struct sm750_dev *sm750_dev;
 444
 445         struct lynxfb_par *par;
 446         struct lynxfb_crtc *crtc;
 447         struct lynx_cursor *cursor;
 448
 449         int ret;
 450
 451         ret = 0;
 452         sm750_dev = pci_get_drvdata(pdev);
 453
 454         console_lock();
 455
 456         ret = pci_set_power_state(pdev, PCI_D0);
 457         if (ret) {
 458                 pr_err("error:%d occurred in pci_set_power_state\n", ret);
 459                 return ret;
 460         }
 461
 462         if (pdev->dev.power.power_state.event != PM_EVENT_FREEZE) {
 463                 pci_restore_state(pdev);
 464                 ret = pci_enable_device(pdev);
 465                 if (ret) {
 466                         pr_err("error:%d occurred in pci_enable_device\n", ret);
 467                         return ret;
 468                 }
 469                 pci_set_master(pdev);
 470         }
 471
 472         hw_sm750_inithw(sm750_dev, pdev);
 473
 474         info = sm750_dev->fbinfo[0];
 475
 476         if (info) {
 477                 par = info->par;
 478                 crtc = &par->crtc;
 479                 cursor = &crtc->cursor;
 480                 memset_io(cursor->vstart, 0x0, cursor->size);
 481                 memset_io(crtc->vScreen, 0x0, crtc->vidmem_size);
 482                 lynxfb_ops_set_par(info);
 483                 fb_set_suspend(info, 0);
 484         }
 485
 486         info = sm750_dev->fbinfo[1];
 487
 488         if (info) {
 489                 par = info->par;
 490                 crtc = &par->crtc;
 491                 cursor = &crtc->cursor;
 492                 memset_io(cursor->vstart, 0x0, cursor->size);
 493                 memset_io(crtc->vScreen, 0x0, crtc->vidmem_size);
 494                 lynxfb_ops_set_par(info);
 495                 fb_set_suspend(info, 0);
 496         }
 497
 498         pdev->dev.power.power_state.event = PM_EVENT_RESUME;
 499         console_unlock();
 500         return ret;
 501 }
 502 #endif
 503
 504 static int lynxfb_ops_check_var(struct fb_var_screeninfo *var,
 505                                 struct fb_info *info)
 506 {
 507         struct lynxfb_par *par;
 508         struct lynxfb_crtc *crtc;
 509         struct lynxfb_output *output;
 510         resource_size_t request;
 511
 512         par = info->par;
 513         crtc = &par->crtc;
 514         output = &par->output;
 515
 516         pr_debug("check var:%dx%d-%d\n",
 517                  var->xres,
 518                  var->yres,
 519                  var->bits_per_pixel);
 520
 521         switch (var->bits_per_pixel) {
 522         case 8:
 523                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 524                 var->red.offset = 0;
 525                 var->red.length = 8;
 526                 var->green.offset = 0;
 527                 var->green.length = 8;
 528                 var->blue.offset = 0;
 529                 var->blue.length = 8;
 530                 var->transp.length = 0;
 531                 var->transp.offset = 0;
 532                 break;
 533         case 16:
 534                 var->red.offset = 11;
 535                 var->red.length = 5;
 536                 var->green.offset = 5;
 537                 var->green.length = 6;
 538                 var->blue.offset = 0;
 539                 var->blue.length = 5;
 540                 var->transp.length = 0;
 541                 var->transp.offset = 0;
 542                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 543                 break;
 544         case 24:
 545         case 32:
 546                 var->red.offset = 16;
 547                 var->red.length = 8;
 548                 var->green.offset = 8;
 549                 var->green.length = 8;
 550                 var->blue.offset = 0;
 551                 var->blue.length = 8;
 552                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 553                 break;
 554         default:
 555                 pr_err("bpp %d not supported\n", var->bits_per_pixel);
 556                 return -EINVAL;
 557         }
 558         var->height = var->width = -1;
 559         var->accel_flags = 0;/* FB_ACCELF_TEXT; */
 560
 561         /* check if current fb's video memory big enought to hold the onscreen*/
 562         request = var->xres_virtual * (var->bits_per_pixel >> 3);
 563         /* defaulty crtc->channel go with par->index */
 564
 565         request = ALIGN(request, crtc->line_pad);
 566         request = request * var->yres_virtual;
 567         if (crtc->vidmem_size < request) {
 568                 pr_err("not enough video memory for mode\n");
 569                 return -ENOMEM;
 570         }
 571
 572         return hw_sm750_crtc_checkMode(crtc, var);
 573 }
 574
 575 static int lynxfb_ops_setcolreg(unsigned regno,
 576                                 unsigned red,
 577                                 unsigned green,
 578                                 unsigned blue,
 579                                 unsigned transp,
 580                                 struct fb_info *info)
 581 {
 582         struct lynxfb_par *par;
 583         struct lynxfb_crtc *crtc;
 584         struct fb_var_screeninfo *var;
 585         int ret;
 586
 587         par = info->par;
 588         crtc = &par->crtc;
 589         var = &info->var;
 590         ret = 0;
 591
 592         if (regno > 256) {
 593                 pr_err("regno = %d\n", regno);
 594                 return -EINVAL;
 595         }
 596
 597         if (info->var.grayscale)
 598                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 599
 600         if (var->bits_per_pixel == 8 &&
 601             info->fix.visual == FB_VISUAL_PSEUDOCOLOR) {
 602                 red >>= 8;
 603                 green >>= 8;
 604                 blue >>= 8;
 605                 ret = hw_sm750_setColReg(crtc, regno, red, green, blue);
 606                 goto exit;
 607         }
 608
 609         if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 256) {
 610                 u32 val;
 611
 612                 if (var->bits_per_pixel == 16 ||
 613                     var->bits_per_pixel == 32 ||
 614                     var->bits_per_pixel == 24) {
 615                         val = chan_to_field(red, &var->red);
 616                         val |= chan_to_field(green, &var->green);
 617                         val |= chan_to_field(blue, &var->blue);
 618                         par->pseudo_palette[regno] = val;
 619                         goto exit;
 620                 }
 621         }
 622
 623         ret = -EINVAL;
 624
 625 exit:
 626         return ret;
 627 }
 628
 629 static int lynxfb_ops_blank(int blank, struct fb_info *info)
 630 {
 631         struct lynxfb_par *par;
 632         struct lynxfb_output *output;
 633
 634         pr_debug("blank = %d.\n", blank);
 635         par = info->par;
 636         output = &par->output;
 637         return output->proc_setBLANK(output, blank);
 638 }
 639
 640 static int sm750fb_set_drv(struct lynxfb_par *par)
 641 {
 642         int ret;
 643         struct sm750_dev *sm750_dev;
 644         struct lynxfb_output *output;
 645         struct lynxfb_crtc *crtc;
 646
 647         ret = 0;
 648
 649         sm750_dev = par->dev;
 650         output = &par->output;
 651         crtc = &par->crtc;
 652
 653         crtc->vidmem_size = (sm750_dev->dual) ? sm750_dev->vidmem_size >> 1 :
 654                              sm750_dev->vidmem_size;
 655         /* setup crtc and output member */
 656         sm750_dev->hwCursor = g_hwcursor;
 657
 658         crtc->line_pad = 16;
 659         crtc->xpanstep = 8;
 660         crtc->ypanstep = 1;
 661         crtc->ywrapstep = 0;
 662
 663         output->proc_setBLANK = (sm750_dev->revid == SM750LE_REVISION_ID) ?
 664                                  hw_sm750le_setBLANK : hw_sm750_setBLANK;
 665         /* chip specific phase */
 666         sm750_dev->accel.de_wait = (sm750_dev->revid == SM750LE_REVISION_ID) ?
 667                                     hw_sm750le_deWait : hw_sm750_deWait;
 668         switch (sm750_dev->dataflow) {
 669         case sm750_simul_pri:
 670                 output->paths = sm750_pnc;
 671                 crtc->channel = sm750_primary;
 672                 crtc->oScreen = 0;
 673                 crtc->vScreen = sm750_dev->pvMem;
 674                 pr_info("use simul primary mode\n");
 675                 break;
 676         case sm750_simul_sec:
 677                 output->paths = sm750_pnc;
 678                 crtc->channel = sm750_secondary;
 679                 crtc->oScreen = 0;
 680                 crtc->vScreen = sm750_dev->pvMem;
 681                 break;
 682         case sm750_dual_normal:
 683                 if (par->index == 0) {
 684                         output->paths = sm750_panel;
 685                         crtc->channel = sm750_primary;
 686                         crtc->oScreen = 0;
 687                         crtc->vScreen = sm750_dev->pvMem;
 688                 } else {
 689                         output->paths = sm750_crt;
 690                         crtc->channel = sm750_secondary;
 691                         /* not consider of padding stuffs for oScreen,need fix */
 692                         crtc->oScreen = (sm750_dev->vidmem_size >> 1);
 693                         crtc->vScreen = sm750_dev->pvMem + crtc->oScreen;
 694                 }
 695                 break;
 696         case sm750_dual_swap:
 697                 if (par->index == 0) {
 698                         output->paths = sm750_panel;
 699                         crtc->channel = sm750_secondary;
 700                         crtc->oScreen = 0;
 701                         crtc->vScreen = sm750_dev->pvMem;
 702                 } else {
 703                         output->paths = sm750_crt;
 704                         crtc->channel = sm750_primary;
 705                         /* not consider of padding stuffs for oScreen,need fix */
 706                         crtc->oScreen = (sm750_dev->vidmem_size >> 1);
 707                         crtc->vScreen = sm750_dev->pvMem + crtc->oScreen;
 708                 }
 709                 break;
 710         default:
 711                 ret = -EINVAL;
 712         }
 713
 714         return ret;
 715 }
 716
 717 static struct fb_ops lynxfb_ops = {
 718         .owner = THIS_MODULE,
 719         .fb_check_var =  lynxfb_ops_check_var,
 720         .fb_set_par = lynxfb_ops_set_par,
 721         .fb_setcolreg = lynxfb_ops_setcolreg,
 722         .fb_blank = lynxfb_ops_blank,
 723         .fb_fillrect = cfb_fillrect,
 724         .fb_imageblit = cfb_imageblit,
 725         .fb_copyarea = cfb_copyarea,
 726         /* cursor */
 727         .fb_cursor = lynxfb_ops_cursor,
 728 };
 729
 730 static int lynxfb_set_fbinfo(struct fb_info *info, int index)
 731 {
 732         int i;
 733         struct lynxfb_par *par;
 734         struct sm750_dev *sm750_dev;
 735         struct lynxfb_crtc *crtc;
 736         struct lynxfb_output *output;
 737         struct fb_var_screeninfo *var;
 738         struct fb_fix_screeninfo *fix;
 739
 740         const struct fb_videomode *pdb[] = {
 741                 lynx750_ext, NULL, vesa_modes,
 742         };
 743         int cdb[] = {ARRAY_SIZE(lynx750_ext), 0, VESA_MODEDB_SIZE};
 744         static const char *mdb_desc[] = {
 745                 "driver prepared modes",
 746                 "kernel prepared default modedb",
 747                 "kernel HELPERS prepared vesa_modes",
 748         };
 749
 750         static const char *fixId[2] = {
 751                 "sm750_fb1", "sm750_fb2",
 752         };
 753
 754         int ret, line_length;
 755
 756         ret = 0;
 757         par = (struct lynxfb_par *)info->par;
 758         sm750_dev = par->dev;
 759         crtc = &par->crtc;
 760         output = &par->output;
 761         var = &info->var;
 762         fix = &info->fix;
 763
 764         /* set index */
 765         par->index = index;
 766         output->channel = &crtc->channel;
 767         sm750fb_set_drv(par);
 768         lynxfb_ops.fb_pan_display = lynxfb_ops_pan_display;
 769
 770         /*
 771          * set current cursor variable and proc pointer,
 772          * must be set after crtc member initialized
 773          */
 774         crtc->cursor.offset = crtc->oScreen + crtc->vidmem_size - 1024;
 775         crtc->cursor.mmio = sm750_dev->pvReg +
 776                 0x800f0 + (int)crtc->channel * 0x140;
 777
 778         pr_info("crtc->cursor.mmio = %p\n", crtc->cursor.mmio);
 779         crtc->cursor.maxH = crtc->cursor.maxW = 64;
 780         crtc->cursor.size = crtc->cursor.maxH * crtc->cursor.maxW * 2 / 8;
 781         crtc->cursor.vstart = sm750_dev->pvMem + crtc->cursor.offset;
 782
 783         memset_io(crtc->cursor.vstart, 0, crtc->cursor.size);
 784         if (!g_hwcursor) {
 785                 lynxfb_ops.fb_cursor = NULL;
 786                 hw_cursor_disable(&crtc->cursor);
 787         }
 788
 789         /* set info->fbops, must be set before fb_find_mode */
 790         if (!sm750_dev->accel_off) {
 791                 /* use 2d acceleration */
 792                 lynxfb_ops.fb_fillrect = lynxfb_ops_fillrect;
 793                 lynxfb_ops.fb_copyarea = lynxfb_ops_copyarea;
 794                 lynxfb_ops.fb_imageblit = lynxfb_ops_imageblit;
 795         }
 796         info->fbops = &lynxfb_ops;
 797
 798         if (!g_fbmode[index]) {
 799                 g_fbmode[index] = g_def_fbmode;
 800                 if (index)
 801                         g_fbmode[index] = g_fbmode[0];
 802         }
 803
 804         for (i = 0; i < 3; i++) {
 805
 806                 ret = fb_find_mode(var, info, g_fbmode[index],
 807                                    pdb[i], cdb[i], NULL, 8);
 808
 809                 if (ret == 1) {
 810                         pr_info("success! use specified mode:%s in %s\n",
 811                                 g_fbmode[index],
 812                                 mdb_desc[i]);
 813                         break;
 814                 } else if (ret == 2) {
 815                         pr_warn("use specified mode:%s in %s,with an ignored refresh rate\n",
 816                                 g_fbmode[index],
 817                                 mdb_desc[i]);
 818                         break;
 819                 } else if (ret == 3) {
 820                         pr_warn("wanna use default mode\n");
 821                         /*break;*/
 822                 } else if (ret == 4) {
 823                         pr_warn("fall back to any valid mode\n");
 824                 } else {
 825                         pr_warn("ret = %d,fb_find_mode failed,with %s\n",
 826                                 ret,
 827                                 mdb_desc[i]);
 828                 }
 829         }
 830
 831         /* some member of info->var had been set by fb_find_mode */
 832
 833         pr_info("Member of info->var is :\n\
 834                 xres=%d\n\
 835                 yres=%d\n\
 836                 xres_virtual=%d\n\
 837                 yres_virtual=%d\n\
 838                 xoffset=%d\n\
 839                 yoffset=%d\n\
 840                 bits_per_pixel=%d\n \
 841                 ...\n",
 842                 var->xres,
 843                 var->yres,
 844                 var->xres_virtual,
 845                 var->yres_virtual,
 846                 var->xoffset,
 847                 var->yoffset,
 848                 var->bits_per_pixel);
 849
 850         /* set par */
 851         par->info = info;
 852
 853         /* set info */
 854         line_length = ALIGN((var->xres_virtual * var->bits_per_pixel / 8),
 855                             crtc->line_pad);
 856
 857         info->pseudo_palette = &par->pseudo_palette[0];
 858         info->screen_base = crtc->vScreen;
 859         pr_debug("screen_base vaddr = %p\n", info->screen_base);
 860         info->screen_size = line_length * var->yres_virtual;
 861         info->flags = FBINFO_FLAG_DEFAULT | 0;
 862
 863         /* set info->fix */
 864         fix->type = FB_TYPE_PACKED_PIXELS;
 865         fix->type_aux = 0;
 866         fix->xpanstep = crtc->xpanstep;
 867         fix->ypanstep = crtc->ypanstep;
 868         fix->ywrapstep = crtc->ywrapstep;
 869         fix->accel = FB_ACCEL_SMI;
 870
 871         strlcpy(fix->id, fixId[index], sizeof(fix->id));
 872
 873         fix->smem_start = crtc->oScreen + sm750_dev->vidmem_start;
 874         pr_info("fix->smem_start = %lx\n", fix->smem_start);
 875         /*
 876          * according to mmap experiment from user space application,
 877          * fix->mmio_len should not larger than virtual size
 878          * (xres_virtual x yres_virtual x ByPP)
 879          * Below line maybe buggy when user mmap fb dev node and write
 880          * data into the bound over virtual size
 881          */
 882         fix->smem_len = crtc->vidmem_size;
 883         pr_info("fix->smem_len = %x\n", fix->smem_len);
 884         info->screen_size = fix->smem_len;
 885         fix->line_length = line_length;
 886         fix->mmio_start = sm750_dev->vidreg_start;
 887         pr_info("fix->mmio_start = %lx\n", fix->mmio_start);
 888         fix->mmio_len = sm750_dev->vidreg_size;
 889         pr_info("fix->mmio_len = %x\n", fix->mmio_len);
 890         switch (var->bits_per_pixel) {
 891         case 8:
 892                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 893                 break;
 894         case 16:
 895         case 32:
 896                 fix->visual = FB_VISUAL_TRUECOLOR;
 897                 break;
 898         }
 899
 900         /* set var */
 901         var->activate = FB_ACTIVATE_NOW;
 902         var->accel_flags = 0;
 903         var->vmode = FB_VMODE_NONINTERLACED;
 904
 905         pr_debug("#1 show info->cmap :\nstart=%d,len=%d,red=%p,green=%p,blue=%p,transp=%p\n",
 906                  info->cmap.start, info->cmap.len,
 907                  info->cmap.red, info->cmap.green, info->cmap.blue,
 908                  info->cmap.transp);
 909
 910         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 911         if (ret < 0) {
 912                 pr_err("Could not allocate memory for cmap.\n");
 913                 goto exit;
 914         }
 915
 916         pr_debug("#2 show info->cmap :\nstart=%d,len=%d,red=%p,green=%p,blue=%p,transp=%p\n",
 917                  info->cmap.start, info->cmap.len,
 918                  info->cmap.red, info->cmap.green, info->cmap.blue,
 919                  info->cmap.transp);
 920
 921 exit:
 922         lynxfb_ops_check_var(var, info);
 923         return ret;
 924 }
 925
 926 /*      chip specific g_option configuration routine */
 927 static void sm750fb_setup(struct sm750_dev *sm750_dev, char *src)
 928 {
 929         char *opt;
 930         int swap;
 931
 932         swap = 0;
 933
 934         sm750_dev->initParm.chip_clk = 0;
 935         sm750_dev->initParm.mem_clk = 0;
 936         sm750_dev->initParm.master_clk = 0;
 937         sm750_dev->initParm.powerMode = 0;
 938         sm750_dev->initParm.setAllEngOff = 0;
 939         sm750_dev->initParm.resetMemory = 1;
 940
 941         /* defaultly turn g_hwcursor on for both view */
 942         g_hwcursor = 3;
 943
 944         if (!src || !*src) {
 945                 pr_warn("no specific g_option.\n");
 946                 goto NO_PARAM;
 947         }
 948
 949         while ((opt = strsep(&src, ":")) != NULL && *opt != 0) {
 950                 pr_info("opt=%s\n", opt);
 951                 pr_info("src=%s\n", src);
 952
 953                 if (!strncmp(opt, "swap", strlen("swap")))
 954                         swap = 1;
 955                 else if (!strncmp(opt, "nocrt", strlen("nocrt")))
 956                         sm750_dev->nocrt = 1;
 957                 else if (!strncmp(opt, "36bit", strlen("36bit")))
 958                         sm750_dev->pnltype = sm750_doubleTFT;
 959                 else if (!strncmp(opt, "18bit", strlen("18bit")))
 960                         sm750_dev->pnltype = sm750_dualTFT;
 961                 else if (!strncmp(opt, "24bit", strlen("24bit")))
 962                         sm750_dev->pnltype = sm750_24TFT;
 963                 else if (!strncmp(opt, "nohwc0", strlen("nohwc0")))
 964                         g_hwcursor &= ~0x1;
 965                 else if (!strncmp(opt, "nohwc1", strlen("nohwc1")))
 966                         g_hwcursor &= ~0x2;
 967                 else if (!strncmp(opt, "nohwc", strlen("nohwc")))
 968                         g_hwcursor = 0;
 969                 else {
 970                         if (!g_fbmode[0]) {
 971                                 g_fbmode[0] = opt;
 972                                 pr_info("find fbmode0 : %s\n", g_fbmode[0]);
 973                         } else if (!g_fbmode[1]) {
 974                                 g_fbmode[1] = opt;
 975                                 pr_info("find fbmode1 : %s\n", g_fbmode[1]);
 976                         } else {
 977                                 pr_warn("How many view you wann set?\n");
 978                         }
 979                 }
 980         }
 981
 982 NO_PARAM:
 983         if (sm750_dev->revid != SM750LE_REVISION_ID) {
 984                 if (sm750_dev->dual) {
 985                         if (swap)
 986                                 sm750_dev->dataflow = sm750_dual_swap;
 987                         else
 988                                 sm750_dev->dataflow = sm750_dual_normal;
 989                 } else {
 990                         if (swap)
 991                                 sm750_dev->dataflow = sm750_simul_sec;
 992                         else
 993                                 sm750_dev->dataflow = sm750_simul_pri;
 994                 }
 995         } else {
 996                 /* SM750LE only have one crt channel */
 997                 sm750_dev->dataflow = sm750_simul_sec;
 998                 /* sm750le do not have complex attributes */
 999                 sm750_dev->nocrt = 0;
1000         }
1001 }
1002
1003 static int lynxfb_pci_probe(struct pci_dev *pdev,
1004                             const struct pci_device_id *ent)
1005 {
1006         struct fb_info *info[] = {NULL, NULL};
1007         struct sm750_dev *sm750_dev = NULL;
1008         int fbidx;
1009
1010         /* enable device */
1011         if (pci_enable_device(pdev)) {
1012                 pr_err("can not enable device.\n");
1013                 goto err_enable;
1014         }
1015
1016         sm750_dev = kzalloc(sizeof(*sm750_dev), GFP_KERNEL);
1017         if (!sm750_dev) {
1018                 pr_err("Could not allocate memory for share.\n");
1019                 goto err_share;
1020         }
1021
1022         sm750_dev->fbinfo[0] = sm750_dev->fbinfo[1] = NULL;
1023         sm750_dev->devid = pdev->device;
1024         sm750_dev->revid = pdev->revision;
1025
1026         pr_info("share->revid = %02x\n", sm750_dev->revid);
1027         sm750_dev->pdev = pdev;
1028         sm750_dev->mtrr_off = g_nomtrr;
1029         sm750_dev->mtrr.vram = 0;
1030         sm750_dev->accel_off = g_noaccel;
1031         sm750_dev->dual = g_dualview;
1032         spin_lock_init(&sm750_dev->slock);
1033
1034         if (!sm750_dev->accel_off) {
1035                 /*
1036                  * hook deInit and 2d routines, notes that below hw_xxx
1037                  * routine can work on most of lynx chips
1038                  * if some chip need specific function,
1039                  * please hook it in smXXX_set_drv routine
1040                  */
1041                 sm750_dev->accel.de_init = hw_de_init;
1042                 sm750_dev->accel.de_fillrect = hw_fillrect;
1043                 sm750_dev->accel.de_copyarea = hw_copyarea;
1044                 sm750_dev->accel.de_imageblit = hw_imageblit;
1045                 pr_info("enable 2d acceleration\n");
1046         } else {
1047                 pr_info("disable 2d acceleration\n");
1048         }
1049
1050         /* call chip specific setup routine  */
1051         sm750fb_setup(sm750_dev, g_settings);
1052
1053         /* call chip specific mmap routine */
1054         if (hw_sm750_map(sm750_dev, pdev)) {
1055                 pr_err("Memory map failed\n");
1056                 goto err_map;
1057         }
1058
1059         if (!sm750_dev->mtrr_off)
1060                 sm750_dev->mtrr.vram = arch_phys_wc_add(sm750_dev->vidmem_start,
1061                                                         sm750_dev->vidmem_size);
1062
1063         memset_io(sm750_dev->pvMem, 0, sm750_dev->vidmem_size);
1064
1065         pr_info("sm%3x mmio address = %p\n", sm750_dev->devid,
1066                 sm750_dev->pvReg);
1067
1068         pci_set_drvdata(pdev, sm750_dev);
1069
1070         /* call chipInit routine */
1071         hw_sm750_inithw(sm750_dev, pdev);
1072
1073         /* allocate frame buffer info structor according to g_dualview */
1074         fbidx = 0;
1075 ALLOC_FB:
1076         info[fbidx] = framebuffer_alloc(sizeof(struct lynxfb_par), &pdev->dev);
1077         if (!info[fbidx]) {
1078                 pr_err("Could not allocate framebuffer #%d.\n", fbidx);
1079                 if (fbidx == 0)
1080                         goto err_info0_alloc;
1081                 else
1082                         goto err_info1_alloc;
1083         } else {
1084                 struct lynxfb_par *par;
1085                 int errno;
1086
1087                 pr_info("framebuffer #%d alloc okay\n", fbidx);
1088                 sm750_dev->fbinfo[fbidx] = info[fbidx];
1089                 par = info[fbidx]->par;
1090                 par->dev = sm750_dev;
1091
1092                 /* set fb_info structure */
1093                 if (lynxfb_set_fbinfo(info[fbidx], fbidx)) {
1094                         pr_err("Failed to initial fb_info #%d.\n", fbidx);
1095                         if (fbidx == 0)
1096                                 goto err_info0_set;
1097                         else
1098                                 goto err_info1_set;
1099                 }
1100
1101                 /* register frame buffer */
1102                 pr_info("Ready to register framebuffer #%d.\n", fbidx);
1103                 errno = register_framebuffer(info[fbidx]);
1104                 if (errno < 0) {
1105                         pr_err("Failed to register fb_info #%d. err %d\n",
1106                                fbidx,
1107                                errno);
1108                         if (fbidx == 0)
1109                                 goto err_register0;
1110                         else
1111                                 goto err_register1;
1112                 }
1113                 pr_info("Accomplished register framebuffer #%d.\n", fbidx);
1114         }
1115
1116         /* no dual view by far */
1117         fbidx++;
1118         if (sm750_dev->dual && fbidx < 2)
1119                 goto ALLOC_FB;
1120
1121         return 0;
1122
1123 err_register1:
1124 err_info1_set:
1125         framebuffer_release(info[1]);
1126 err_info1_alloc:
1127         unregister_framebuffer(info[0]);
1128 err_register0:
1129 err_info0_set:
1130         framebuffer_release(info[0]);
1131 err_info0_alloc:
1132 err_map:
1133         kfree(sm750_dev);
1134 err_share:
1135 err_enable:
1136         return -ENODEV;
1137 }
1138
1139 static void lynxfb_pci_remove(struct pci_dev *pdev)
1140 {
1141         struct fb_info *info;
1142         struct sm750_dev *sm750_dev;
1143         struct lynxfb_par *par;
1144         int cnt;
1145
1146         cnt = 2;
1147         sm750_dev = pci_get_drvdata(pdev);
1148
1149         while (cnt-- > 0) {
1150                 info = sm750_dev->fbinfo[cnt];
1151                 if (!info)
1152                         continue;
1153                 par = info->par;
1154
1155                 unregister_framebuffer(info);
1156                 /* release frame buffer */
1157                 framebuffer_release(info);
1158         }
1159         arch_phys_wc_del(sm750_dev->mtrr.vram);
1160
1161         iounmap(sm750_dev->pvReg);
1162         iounmap(sm750_dev->pvMem);
1163         kfree(g_settings);
1164         kfree(sm750_dev);
1165         pci_set_drvdata(pdev, NULL);
1166 }
1167
1168 static int __init lynxfb_setup(char *options)
1169 {
1170         int len;
1171         char *opt, *tmp;
1172
1173         if (!options || !*options) {
1174                 pr_warn("no options.\n");
1175                 return 0;
1176         }
1177
1178         pr_info("options:%s\n", options);
1179
1180         len = strlen(options) + 1;
1181         g_settings = kzalloc(len, GFP_KERNEL);
1182         if (!g_settings)
1183                 return -ENOMEM;
1184
1185         tmp = g_settings;
1186
1187         /*
1188          * Notes:
1189          * char * strsep(char **s,const char * ct);
1190          * @s: the string to be searched
1191          * @ct :the characters to search for
1192          *
1193          * strsep() updates @options to pointer after the first found token
1194          * it also returns the pointer ahead the token.
1195          */
1196         while ((opt = strsep(&options, ":")) != NULL) {
1197                 /* options that mean for any lynx chips are configured here */
1198                 if (!strncmp(opt, "noaccel", strlen("noaccel")))
1199                         g_noaccel = 1;
1200                 else if (!strncmp(opt, "nomtrr", strlen("nomtrr")))
1201                         g_nomtrr = 1;
1202                 else if (!strncmp(opt, "dual", strlen("dual")))
1203                         g_dualview = 1;
1204                 else {
1205                         strcat(tmp, opt);
1206                         tmp += strlen(opt);
1207                         if (options != NULL)
1208                                 *tmp++ = ':';
1209                         else
1210                                 *tmp++ = 0;
1211                 }
1212         }
1213
1214         /* misc g_settings are transport to chip specific routines */
1215         pr_info("parameter left for chip specific analysis:%s\n", g_settings);
1216         return 0;
1217 }
1218
1219 static struct pci_device_id smi_pci_table[] = {
1220         { PCI_DEVICE(0x126f, 0x0750), },
1221         {0,}
1222 };
1223
1224 MODULE_DEVICE_TABLE(pci, smi_pci_table);
1225
1226 static struct pci_driver lynxfb_driver = {
1227         .name =         "sm750fb",
1228         .id_table =     smi_pci_table,
1229         .probe =        lynxfb_pci_probe,
1230         .remove =       lynxfb_pci_remove,
1231 #ifdef CONFIG_PM
1232         .suspend = lynxfb_suspend,
1233         .resume = lynxfb_resume,
1234 #endif
1235 };
1236
1237 static int __init lynxfb_init(void)
1238 {
1239         char *option;
1240         int ret;
1241
1242 #ifdef MODULE
1243         option = g_option;
1244 #else
1245         if (fb_get_options("sm750fb", &option))
1246                 return -ENODEV;
1247 #endif
1248
1249         lynxfb_setup(option);
1250         ret = pci_register_driver(&lynxfb_driver);
1251         return ret;
1252 }
1253 module_init(lynxfb_init);
1254
1255 static void __exit lynxfb_exit(void)
1256 {
1257         pci_unregister_driver(&lynxfb_driver);
1258 }
1259 module_exit(lynxfb_exit);
1260
1261 module_param(g_option, charp, S_IRUGO);
1262
1263 MODULE_PARM_DESC(g_option,
1264                  "\n\t\tCommon options:\n"
1265                  "\t\tnoaccel:disable 2d capabilities\n"
1266                  "\t\tnomtrr:disable MTRR attribute for video memory\n"
1267                  "\t\tdualview:dual frame buffer feature enabled\n"
1268                  "\t\tnohwc:disable hardware cursor\n"
1269                  "\t\tUsual example:\n"
1270                  "\t\tinsmod ./sm750fb.ko g_option=\"noaccel,nohwc,1280x1024-8@60\"\n"
1271                  );
1272
1273 MODULE_AUTHOR("monk liu <monk.liu@siliconmotion.com>");
1274 MODULE_AUTHOR("Sudip Mukherjee <sudip@vectorindia.org>");
1275 MODULE_DESCRIPTION("Frame buffer driver for SM750 chipset");
1276 MODULE_LICENSE("GPL v2");