drivers/video/fbdev/fb-puv3.c

   1 /*
   2  * Frame Buffer Driver for PKUnity-v3 Unigfx
   3  * Code specific to PKUnity SoC and UniCore ISA
   4  *
   5  *      Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
   6  *      Copyright (C) 2001-2010 Guan Xuetao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/clk.h>
  18 #include <linux/fb.h>
  19 #include <linux/init.h>
  20 #include <linux/console.h>
  21 #include <linux/mm.h>
  22
  23 #include <asm/sizes.h>
  24 #include <asm/pgtable.h>
  25 #include <mach/hardware.h>
  26
  27 /* Platform_data reserved for unifb registers. */
  28 #define UNIFB_REGS_NUM          10
  29 /* RAM reserved for the frame buffer. */
  30 #define UNIFB_MEMSIZE           (SZ_4M)         /* 4 MB for 1024*768*32b */
  31
  32 /*
  33  * cause UNIGFX don not have EDID
  34  * all the modes are organized as follow
  35  */
  36 static const struct fb_videomode unifb_modes[] = {
  37         /* 0 640x480-60 VESA */
  38         { "640x480@60",  60,  640, 480,  25175000,  48, 16, 34, 10,  96, 1,
  39           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  40         /* 1 640x480-75 VESA */
  41         { "640x480@75",  75,  640, 480,  31500000, 120, 16, 18,  1,  64, 1,
  42           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  43         /* 2 800x600-60 VESA */
  44         { "800x600@60",  60,  800, 600,  40000000,  88, 40, 26,  1, 128, 1,
  45           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  46         /* 3 800x600-75 VESA */
  47         { "800x600@75",  75,  800, 600,  49500000, 160, 16, 23,  1,  80, 1,
  48           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  49         /* 4 1024x768-60 VESA */
  50         { "1024x768@60", 60, 1024, 768,  65000000, 160, 24, 34,  3, 136, 1,
  51           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  52         /* 5 1024x768-75 VESA */
  53         { "1024x768@75", 75, 1024, 768,  78750000, 176, 16, 30,  1,  96, 1,
  54           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  55         /* 6 1280x960-60 VESA */
  56         { "1280x960@60", 60, 1280, 960, 108000000, 312, 96, 38,  1, 112, 1,
  57           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  58         /* 7 1440x900-60 VESA */
  59         { "1440x900@60", 60, 1440, 900, 106500000, 232, 80, 30,  3, 152, 1,
  60           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  61         /* 8 FIXME 9 1024x600-60 VESA UNTESTED */
  62         { "1024x600@60", 60, 1024, 600,  50650000, 160, 24, 26,  1, 136, 1,
  63           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  64         /* 9 FIXME 10 1024x600-75 VESA UNTESTED */
  65         { "1024x600@75", 75, 1024, 600,  61500000, 176, 16, 23,  1,  96, 1,
  66           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  67         /* 10 FIXME 11 1366x768-60 VESA UNTESTED */
  68         { "1366x768@60", 60, 1366, 768,  85500000, 256, 58, 18,  1,  112, 3,
  69           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  70 };
  71
  72 static struct fb_var_screeninfo unifb_default = {
  73         .xres =         640,
  74         .yres =         480,
  75         .xres_virtual = 640,
  76         .yres_virtual = 480,
  77         .bits_per_pixel = 16,
  78         .red =          { 11, 5, 0 },
  79         .green =        { 5,  6, 0 },
  80         .blue =         { 0,  5, 0 },
  81         .activate =     FB_ACTIVATE_NOW,
  82         .height =       -1,
  83         .width =        -1,
  84         .pixclock =     25175000,
  85         .left_margin =  48,
  86         .right_margin = 16,
  87         .upper_margin = 33,
  88         .lower_margin = 10,
  89         .hsync_len =    96,
  90         .vsync_len =    2,
  91         .vmode =        FB_VMODE_NONINTERLACED,
  92 };
  93
  94 static struct fb_fix_screeninfo unifb_fix = {
  95         .id =           "UNIGFX FB",
  96         .type =         FB_TYPE_PACKED_PIXELS,
  97         .visual =       FB_VISUAL_TRUECOLOR,
  98         .xpanstep =     1,
  99         .ypanstep =     1,
 100         .ywrapstep =    1,
 101         .accel =        FB_ACCEL_NONE,
 102 };
 103
 104 static void unifb_sync(struct fb_info *info)
 105 {
 106         /* TODO: may, this can be replaced by interrupt */
 107         int cnt;
 108
 109         for (cnt = 0; cnt < 0x10000000; cnt++) {
 110                 if (readl(UGE_COMMAND) & 0x1000000)
 111                         return;
 112         }
 113
 114         if (cnt > 0x8000000)
 115                 dev_warn(info->device, "Warning: UniGFX GE time out ...\n");
 116 }
 117
 118 static void unifb_prim_fillrect(struct fb_info *info,
 119                                 const struct fb_fillrect *region)
 120 {
 121         int awidth = region->width;
 122         int aheight = region->height;
 123         int m_iBpp = info->var.bits_per_pixel;
 124         int screen_width = info->var.xres;
 125         int src_sel = 1;        /* from fg_color */
 126         int pat_sel = 1;
 127         int src_x0 = 0;
 128         int dst_x0 = region->dx;
 129         int src_y0 = 0;
 130         int dst_y0 = region->dy;
 131         int rop_alpha_sel = 0;
 132         int rop_alpha_code = 0xCC;
 133         int x_dir = 1;
 134         int y_dir = 1;
 135         int alpha_r = 0;
 136         int alpha_sel = 0;
 137         int dst_pitch = screen_width * (m_iBpp / 8);
 138         int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
 139         int src_pitch = screen_width * (m_iBpp / 8);
 140         int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
 141         unsigned int command = 0;
 142         int clip_region = 0;
 143         int clip_en = 0;
 144         int tp_en = 0;
 145         int fg_color = 0;
 146         int bottom = info->var.yres - 1;
 147         int right = info->var.xres - 1;
 148         int top = 0;
 149
 150         bottom = (bottom << 16) | right;
 151         command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16)
 152                 | (x_dir << 20) | (y_dir << 21) | (command << 24)
 153                 | (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
 154         src_pitch = (dst_pitch << 16) | src_pitch;
 155         awidth = awidth | (aheight << 16);
 156         alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff)
 157                 | (alpha_sel << 16);
 158         src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
 159         dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
 160         fg_color = region->color;
 161
 162         unifb_sync(info);
 163
 164         writel(((u32 *)(info->pseudo_palette))[fg_color], UGE_FCOLOR);
 165         writel(0, UGE_BCOLOR);
 166         writel(src_pitch, UGE_PITCH);
 167         writel(src_offset, UGE_SRCSTART);
 168         writel(dst_offset, UGE_DSTSTART);
 169         writel(awidth, UGE_WIDHEIGHT);
 170         writel(top, UGE_CLIP0);
 171         writel(bottom, UGE_CLIP1);
 172         writel(alpha_r, UGE_ROPALPHA);
 173         writel(src_x0, UGE_SRCXY);
 174         writel(dst_x0, UGE_DSTXY);
 175         writel(command, UGE_COMMAND);
 176 }
 177
 178 static void unifb_fillrect(struct fb_info *info,
 179                 const struct fb_fillrect *region)
 180 {
 181         struct fb_fillrect modded;
 182         int vxres, vyres;
 183
 184         if (info->flags & FBINFO_HWACCEL_DISABLED) {
 185                 sys_fillrect(info, region);
 186                 return;
 187         }
 188
 189         vxres = info->var.xres_virtual;
 190         vyres = info->var.yres_virtual;
 191
 192         memcpy(&modded, region, sizeof(struct fb_fillrect));
 193
 194         if (!modded.width || !modded.height ||
 195             modded.dx >= vxres || modded.dy >= vyres)
 196                 return;
 197
 198         if (modded.dx + modded.width > vxres)
 199                 modded.width = vxres - modded.dx;
 200         if (modded.dy + modded.height > vyres)
 201                 modded.height = vyres - modded.dy;
 202
 203         unifb_prim_fillrect(info, &modded);
 204 }
 205
 206 static void unifb_prim_copyarea(struct fb_info *info,
 207                                 const struct fb_copyarea *area)
 208 {
 209         int awidth = area->width;
 210         int aheight = area->height;
 211         int m_iBpp = info->var.bits_per_pixel;
 212         int screen_width = info->var.xres;
 213         int src_sel = 2;        /* from mem */
 214         int pat_sel = 0;
 215         int src_x0 = area->sx;
 216         int dst_x0 = area->dx;
 217         int src_y0 = area->sy;
 218         int dst_y0 = area->dy;
 219
 220         int rop_alpha_sel = 0;
 221         int rop_alpha_code = 0xCC;
 222         int x_dir = 1;
 223         int y_dir = 1;
 224
 225         int alpha_r = 0;
 226         int alpha_sel = 0;
 227         int dst_pitch = screen_width * (m_iBpp / 8);
 228         int dst_offset = dst_y0 * dst_pitch + dst_x0 * (m_iBpp / 8);
 229         int src_pitch = screen_width * (m_iBpp / 8);
 230         int src_offset = src_y0 * src_pitch + src_x0 * (m_iBpp / 8);
 231         unsigned int command = 0;
 232         int clip_region = 0;
 233         int clip_en = 1;
 234         int tp_en = 0;
 235         int top = 0;
 236         int bottom = info->var.yres;
 237         int right = info->var.xres;
 238         int fg_color = 0;
 239         int bg_color = 0;
 240
 241         if (src_x0 < 0)
 242                 src_x0 = 0;
 243         if (src_y0 < 0)
 244                 src_y0 = 0;
 245
 246         if (src_y0 - dst_y0 > 0) {
 247                 y_dir = 1;
 248         } else {
 249                 y_dir = 0;
 250                 src_offset = (src_y0 + aheight) * src_pitch +
 251                                 src_x0 * (m_iBpp / 8);
 252                 dst_offset = (dst_y0 + aheight) * dst_pitch +
 253                                 dst_x0 * (m_iBpp / 8);
 254                 src_y0 += aheight;
 255                 dst_y0 += aheight;
 256         }
 257
 258         command = (rop_alpha_sel << 26) | (pat_sel << 18) | (src_sel << 16) |
 259                 (x_dir << 20) | (y_dir << 21) | (command << 24) |
 260                 (clip_region << 23) | (clip_en << 22) | (tp_en << 27);
 261         src_pitch = (dst_pitch << 16) | src_pitch;
 262         awidth = awidth | (aheight << 16);
 263         alpha_r = ((rop_alpha_code & 0xff) << 8) | (alpha_r & 0xff) |
 264                 (alpha_sel << 16);
 265         src_x0 = (src_x0 & 0x1fff) | ((src_y0 & 0x1fff) << 16);
 266         dst_x0 = (dst_x0 & 0x1fff) | ((dst_y0 & 0x1fff) << 16);
 267         bottom = (bottom << 16) | right;
 268
 269         unifb_sync(info);
 270
 271         writel(src_pitch, UGE_PITCH);
 272         writel(src_offset, UGE_SRCSTART);
 273         writel(dst_offset, UGE_DSTSTART);
 274         writel(awidth, UGE_WIDHEIGHT);
 275         writel(top, UGE_CLIP0);
 276         writel(bottom, UGE_CLIP1);
 277         writel(bg_color, UGE_BCOLOR);
 278         writel(fg_color, UGE_FCOLOR);
 279         writel(alpha_r, UGE_ROPALPHA);
 280         writel(src_x0, UGE_SRCXY);
 281         writel(dst_x0, UGE_DSTXY);
 282         writel(command, UGE_COMMAND);
 283 }
 284
 285 static void unifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 286 {
 287         struct fb_copyarea modded;
 288         u32 vxres, vyres;
 289         modded.sx = area->sx;
 290         modded.sy = area->sy;
 291         modded.dx = area->dx;
 292         modded.dy = area->dy;
 293         modded.width = area->width;
 294         modded.height = area->height;
 295
 296         if (info->flags & FBINFO_HWACCEL_DISABLED) {
 297                 sys_copyarea(info, area);
 298                 return;
 299         }
 300
 301         vxres = info->var.xres_virtual;
 302         vyres = info->var.yres_virtual;
 303
 304         if (!modded.width || !modded.height ||
 305             modded.sx >= vxres || modded.sy >= vyres ||
 306             modded.dx >= vxres || modded.dy >= vyres)
 307                 return;
 308
 309         if (modded.sx + modded.width > vxres)
 310                 modded.width = vxres - modded.sx;
 311         if (modded.dx + modded.width > vxres)
 312                 modded.width = vxres - modded.dx;
 313         if (modded.sy + modded.height > vyres)
 314                 modded.height = vyres - modded.sy;
 315         if (modded.dy + modded.height > vyres)
 316                 modded.height = vyres - modded.dy;
 317
 318         unifb_prim_copyarea(info, &modded);
 319 }
 320
 321 static void unifb_imageblit(struct fb_info *info, const struct fb_image *image)
 322 {
 323         sys_imageblit(info, image);
 324 }
 325
 326 static u_long get_line_length(int xres_virtual, int bpp)
 327 {
 328         u_long length;
 329
 330         length = xres_virtual * bpp;
 331         length = (length + 31) & ~31;
 332         length >>= 3;
 333         return length;
 334 }
 335
 336 /*
 337  *  Setting the video mode has been split into two parts.
 338  *  First part, xxxfb_check_var, must not write anything
 339  *  to hardware, it should only verify and adjust var.
 340  *  This means it doesn't alter par but it does use hardware
 341  *  data from it to check this var.
 342  */
 343 static int unifb_check_var(struct fb_var_screeninfo *var,
 344                          struct fb_info *info)
 345 {
 346         u_long line_length;
 347
 348         /*
 349          *  FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
 350          *  as FB_VMODE_SMOOTH_XPAN is only used internally
 351          */
 352
 353         if (var->vmode & FB_VMODE_CONUPDATE) {
 354                 var->vmode |= FB_VMODE_YWRAP;
 355                 var->xoffset = info->var.xoffset;
 356                 var->yoffset = info->var.yoffset;
 357         }
 358
 359         /*
 360          *  Some very basic checks
 361          */
 362         if (!var->xres)
 363                 var->xres = 1;
 364         if (!var->yres)
 365                 var->yres = 1;
 366         if (var->xres > var->xres_virtual)
 367                 var->xres_virtual = var->xres;
 368         if (var->yres > var->yres_virtual)
 369                 var->yres_virtual = var->yres;
 370         if (var->bits_per_pixel <= 1)
 371                 var->bits_per_pixel = 1;
 372         else if (var->bits_per_pixel <= 8)
 373                 var->bits_per_pixel = 8;
 374         else if (var->bits_per_pixel <= 16)
 375                 var->bits_per_pixel = 16;
 376         else if (var->bits_per_pixel <= 24)
 377                 var->bits_per_pixel = 24;
 378         else if (var->bits_per_pixel <= 32)
 379                 var->bits_per_pixel = 32;
 380         else
 381                 return -EINVAL;
 382
 383         if (var->xres_virtual < var->xoffset + var->xres)
 384                 var->xres_virtual = var->xoffset + var->xres;
 385         if (var->yres_virtual < var->yoffset + var->yres)
 386                 var->yres_virtual = var->yoffset + var->yres;
 387
 388         /*
 389          *  Memory limit
 390          */
 391         line_length =
 392             get_line_length(var->xres_virtual, var->bits_per_pixel);
 393         if (line_length * var->yres_virtual > UNIFB_MEMSIZE)
 394                 return -ENOMEM;
 395
 396         /*
 397          * Now that we checked it we alter var. The reason being is that the
 398          * video mode passed in might not work but slight changes to it might
 399          * make it work. This way we let the user know what is acceptable.
 400          */
 401         switch (var->bits_per_pixel) {
 402         case 1:
 403         case 8:
 404                 var->red.offset = 0;
 405                 var->red.length = 8;
 406                 var->green.offset = 0;
 407                 var->green.length = 8;
 408                 var->blue.offset = 0;
 409                 var->blue.length = 8;
 410                 var->transp.offset = 0;
 411                 var->transp.length = 0;
 412                 break;
 413         case 16:                /* RGBA 5551 */
 414                 if (var->transp.length) {
 415                         var->red.offset = 0;
 416                         var->red.length = 5;
 417                         var->green.offset = 5;
 418                         var->green.length = 5;
 419                         var->blue.offset = 10;
 420                         var->blue.length = 5;
 421                         var->transp.offset = 15;
 422                         var->transp.length = 1;
 423                 } else {        /* RGB 565 */
 424                         var->red.offset = 11;
 425                         var->red.length = 5;
 426                         var->green.offset = 5;
 427                         var->green.length = 6;
 428                         var->blue.offset = 0;
 429                         var->blue.length = 5;
 430                         var->transp.offset = 0;
 431                         var->transp.length = 0;
 432                 }
 433                 break;
 434         case 24:                /* RGB 888 */
 435                 var->red.offset = 0;
 436                 var->red.length = 8;
 437                 var->green.offset = 8;
 438                 var->green.length = 8;
 439                 var->blue.offset = 16;
 440                 var->blue.length = 8;
 441                 var->transp.offset = 0;
 442                 var->transp.length = 0;
 443                 break;
 444         case 32:                /* RGBA 8888 */
 445                 var->red.offset = 16;
 446                 var->red.length = 8;
 447                 var->green.offset = 8;
 448                 var->green.length = 8;
 449                 var->blue.offset = 0;
 450                 var->blue.length = 8;
 451                 var->transp.offset = 24;
 452                 var->transp.length = 8;
 453                 break;
 454         }
 455         var->red.msb_right = 0;
 456         var->green.msb_right = 0;
 457         var->blue.msb_right = 0;
 458         var->transp.msb_right = 0;
 459
 460         return 0;
 461 }
 462
 463 /*
 464  * This routine actually sets the video mode. It's in here where we
 465  * the hardware state info->par and fix which can be affected by the
 466  * change in par. For this driver it doesn't do much.
 467  */
 468 static int unifb_set_par(struct fb_info *info)
 469 {
 470         int hTotal, vTotal, hSyncStart, hSyncEnd, vSyncStart, vSyncEnd;
 471         int format;
 472
 473 #ifdef CONFIG_PUV3_PM
 474         struct clk *clk_vga;
 475         u32 pixclk = 0;
 476         int i;
 477
 478         for (i = 0; i <= 10; i++) {
 479                 if    (info->var.xres         == unifb_modes[i].xres
 480                     && info->var.yres         == unifb_modes[i].yres
 481                     && info->var.upper_margin == unifb_modes[i].upper_margin
 482                     && info->var.lower_margin == unifb_modes[i].lower_margin
 483                     && info->var.left_margin  == unifb_modes[i].left_margin
 484                     && info->var.right_margin == unifb_modes[i].right_margin
 485                     && info->var.hsync_len    == unifb_modes[i].hsync_len
 486                     && info->var.vsync_len    == unifb_modes[i].vsync_len) {
 487                         pixclk = unifb_modes[i].pixclock;
 488                         break;
 489                 }
 490         }
 491
 492         /* set clock rate */
 493         clk_vga = clk_get(info->device, "VGA_CLK");
 494         if (clk_vga == ERR_PTR(-ENOENT))
 495                 return -ENOENT;
 496
 497         if (pixclk != 0) {
 498                 if (clk_set_rate(clk_vga, pixclk)) { /* set clock failed */
 499                         info->fix = unifb_fix;
 500                         info->var = unifb_default;
 501                         if (clk_set_rate(clk_vga, unifb_default.pixclock))
 502                                 return -EINVAL;
 503                 }
 504         }
 505 #endif
 506
 507         info->fix.line_length = get_line_length(info->var.xres_virtual,
 508                                                 info->var.bits_per_pixel);
 509
 510         hSyncStart = info->var.xres + info->var.right_margin;
 511         hSyncEnd = hSyncStart + info->var.hsync_len;
 512         hTotal = hSyncEnd + info->var.left_margin;
 513
 514         vSyncStart = info->var.yres + info->var.lower_margin;
 515         vSyncEnd = vSyncStart + info->var.vsync_len;
 516         vTotal = vSyncEnd + info->var.upper_margin;
 517
 518         switch (info->var.bits_per_pixel) {
 519         case 8:
 520                 format = UDE_CFG_DST8;
 521                 break;
 522         case 16:
 523                 format = UDE_CFG_DST16;
 524                 break;
 525         case 24:
 526                 format = UDE_CFG_DST24;
 527                 break;
 528         case 32:
 529                 format = UDE_CFG_DST32;
 530                 break;
 531         default:
 532                 return -EINVAL;
 533         }
 534
 535         writel(info->fix.smem_start, UDE_FSA);
 536         writel(info->var.yres, UDE_LS);
 537         writel(get_line_length(info->var.xres,
 538                         info->var.bits_per_pixel) >> 3, UDE_PS);
 539                         /* >> 3 for hardware required. */
 540         writel((hTotal << 16) | (info->var.xres), UDE_HAT);
 541         writel(((hTotal - 1) << 16) | (info->var.xres - 1), UDE_HBT);
 542         writel(((hSyncEnd - 1) << 16) | (hSyncStart - 1), UDE_HST);
 543         writel((vTotal << 16) | (info->var.yres), UDE_VAT);
 544         writel(((vTotal - 1) << 16) | (info->var.yres - 1), UDE_VBT);
 545         writel(((vSyncEnd - 1) << 16) | (vSyncStart - 1), UDE_VST);
 546         writel(UDE_CFG_GDEN_ENABLE | UDE_CFG_TIMEUP_ENABLE
 547                         | format | 0xC0000001, UDE_CFG);
 548
 549         return 0;
 550 }
 551
 552 /*
 553  *  Set a single color register. The values supplied are already
 554  *  rounded down to the hardware's capabilities (according to the
 555  *  entries in the var structure). Return != 0 for invalid regno.
 556  */
 557 static int unifb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 558                          u_int transp, struct fb_info *info)
 559 {
 560         if (regno >= 256)       /* no. of hw registers */
 561                 return 1;
 562
 563         /* grayscale works only partially under directcolor */
 564         if (info->var.grayscale) {
 565                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 566                 red = green = blue =
 567                     (red * 77 + green * 151 + blue * 28) >> 8;
 568         }
 569
 570 #define CNVT_TOHW(val, width) ((((val)<<(width))+0x7FFF-(val))>>16)
 571         switch (info->fix.visual) {
 572         case FB_VISUAL_TRUECOLOR:
 573         case FB_VISUAL_PSEUDOCOLOR:
 574                 red = CNVT_TOHW(red, info->var.red.length);
 575                 green = CNVT_TOHW(green, info->var.green.length);
 576                 blue = CNVT_TOHW(blue, info->var.blue.length);
 577                 transp = CNVT_TOHW(transp, info->var.transp.length);
 578                 break;
 579         case FB_VISUAL_DIRECTCOLOR:
 580                 red = CNVT_TOHW(red, 8);        /* expect 8 bit DAC */
 581                 green = CNVT_TOHW(green, 8);
 582                 blue = CNVT_TOHW(blue, 8);
 583                 /* hey, there is bug in transp handling... */
 584                 transp = CNVT_TOHW(transp, 8);
 585                 break;
 586         }
 587 #undef CNVT_TOHW
 588         /* Truecolor has hardware independent palette */
 589         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 590                 u32 v;
 591
 592                 if (regno >= 16)
 593                         return 1;
 594
 595                 v = (red << info->var.red.offset) |
 596                     (green << info->var.green.offset) |
 597                     (blue << info->var.blue.offset) |
 598                     (transp << info->var.transp.offset);
 599                 switch (info->var.bits_per_pixel) {
 600                 case 8:
 601                         break;
 602                 case 16:
 603                 case 24:
 604                 case 32:
 605                         ((u32 *) (info->pseudo_palette))[regno] = v;
 606                         break;
 607                 default:
 608                         return 1;
 609                 }
 610                 return 0;
 611         }
 612         return 0;
 613 }
 614
 615 /*
 616  *  Pan or Wrap the Display
 617  *
 618  *  This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
 619  */
 620 static int unifb_pan_display(struct fb_var_screeninfo *var,
 621                            struct fb_info *info)
 622 {
 623         if (var->vmode & FB_VMODE_YWRAP) {
 624                 if (var->yoffset < 0
 625                     || var->yoffset >= info->var.yres_virtual
 626                     || var->xoffset)
 627                         return -EINVAL;
 628         } else {
 629                 if (var->xoffset + info->var.xres > info->var.xres_virtual ||
 630                     var->yoffset + info->var.yres > info->var.yres_virtual)
 631                         return -EINVAL;
 632         }
 633         info->var.xoffset = var->xoffset;
 634         info->var.yoffset = var->yoffset;
 635         if (var->vmode & FB_VMODE_YWRAP)
 636                 info->var.vmode |= FB_VMODE_YWRAP;
 637         else
 638                 info->var.vmode &= ~FB_VMODE_YWRAP;
 639         return 0;
 640 }
 641
 642 int unifb_mmap(struct fb_info *info,
 643                     struct vm_area_struct *vma)
 644 {
 645         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 646
 647         return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len);
 648 }
 649
 650 static struct fb_ops unifb_ops = {
 651         .fb_read        = fb_sys_read,
 652         .fb_write       = fb_sys_write,
 653         .fb_check_var   = unifb_check_var,
 654         .fb_set_par     = unifb_set_par,
 655         .fb_setcolreg   = unifb_setcolreg,
 656         .fb_pan_display = unifb_pan_display,
 657         .fb_fillrect    = unifb_fillrect,
 658         .fb_copyarea    = unifb_copyarea,
 659         .fb_imageblit   = unifb_imageblit,
 660         .fb_mmap        = unifb_mmap,
 661 };
 662
 663 /*
 664  *  Initialisation
 665  */
 666 static int unifb_probe(struct platform_device *dev)
 667 {
 668         struct fb_info *info;
 669         u32 unifb_regs[UNIFB_REGS_NUM];
 670         int retval = -ENOMEM;
 671         struct resource *iomem;
 672         void *videomemory;
 673
 674         videomemory = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP,
 675                                 get_order(UNIFB_MEMSIZE));
 676         if (!videomemory)
 677                 goto err;
 678
 679         memset(videomemory, 0, UNIFB_MEMSIZE);
 680
 681         unifb_fix.smem_start = virt_to_phys(videomemory);
 682         unifb_fix.smem_len = UNIFB_MEMSIZE;
 683
 684         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 685         unifb_fix.mmio_start = iomem->start;
 686
 687         info = framebuffer_alloc(sizeof(u32)*256, &dev->dev);
 688         if (!info)
 689                 goto err;
 690
 691         info->screen_base = (char __iomem *)videomemory;
 692         info->fbops = &unifb_ops;
 693
 694         retval = fb_find_mode(&info->var, info, NULL,
 695                               unifb_modes, 10, &unifb_modes[0], 16);
 696
 697         if (!retval || (retval == 4))
 698                 info->var = unifb_default;
 699
 700         info->fix = unifb_fix;
 701         info->pseudo_palette = info->par;
 702         info->par = NULL;
 703         info->flags = FBINFO_FLAG_DEFAULT;
 704 #ifdef FB_ACCEL_PUV3_UNIGFX
 705         info->fix.accel = FB_ACCEL_PUV3_UNIGFX;
 706 #endif
 707
 708         retval = fb_alloc_cmap(&info->cmap, 256, 0);
 709         if (retval < 0)
 710                 goto err1;
 711
 712         retval = register_framebuffer(info);
 713         if (retval < 0)
 714                 goto err2;
 715         platform_set_drvdata(dev, info);
 716         platform_device_add_data(dev, unifb_regs, sizeof(u32) * UNIFB_REGS_NUM);
 717
 718         fb_info(info, "Virtual frame buffer device, using %dM of video memory\n",
 719                 UNIFB_MEMSIZE >> 20);
 720         return 0;
 721 err2:
 722         fb_dealloc_cmap(&info->cmap);
 723 err1:
 724         framebuffer_release(info);
 725 err:
 726         return retval;
 727 }
 728
 729 static int unifb_remove(struct platform_device *dev)
 730 {
 731         struct fb_info *info = platform_get_drvdata(dev);
 732
 733         if (info) {
 734                 unregister_framebuffer(info);
 735                 fb_dealloc_cmap(&info->cmap);
 736                 framebuffer_release(info);
 737         }
 738         return 0;
 739 }
 740
 741 #ifdef CONFIG_PM
 742 static int unifb_resume(struct platform_device *dev)
 743 {
 744         int rc = 0;
 745         u32 *unifb_regs = dev->dev.platform_data;
 746
 747         if (dev->dev.power.power_state.event == PM_EVENT_ON)
 748                 return 0;
 749
 750         console_lock();
 751
 752         if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
 753                 writel(unifb_regs[0], UDE_FSA);
 754                 writel(unifb_regs[1], UDE_LS);
 755                 writel(unifb_regs[2], UDE_PS);
 756                 writel(unifb_regs[3], UDE_HAT);
 757                 writel(unifb_regs[4], UDE_HBT);
 758                 writel(unifb_regs[5], UDE_HST);
 759                 writel(unifb_regs[6], UDE_VAT);
 760                 writel(unifb_regs[7], UDE_VBT);
 761                 writel(unifb_regs[8], UDE_VST);
 762                 writel(unifb_regs[9], UDE_CFG);
 763         }
 764         dev->dev.power.power_state = PMSG_ON;
 765
 766         console_unlock();
 767
 768         return rc;
 769 }
 770
 771 static int unifb_suspend(struct platform_device *dev, pm_message_t mesg)
 772 {
 773         u32 *unifb_regs = dev->dev.platform_data;
 774
 775         unifb_regs[0] = readl(UDE_FSA);
 776         unifb_regs[1] = readl(UDE_LS);
 777         unifb_regs[2] = readl(UDE_PS);
 778         unifb_regs[3] = readl(UDE_HAT);
 779         unifb_regs[4] = readl(UDE_HBT);
 780         unifb_regs[5] = readl(UDE_HST);
 781         unifb_regs[6] = readl(UDE_VAT);
 782         unifb_regs[7] = readl(UDE_VBT);
 783         unifb_regs[8] = readl(UDE_VST);
 784         unifb_regs[9] = readl(UDE_CFG);
 785
 786         if (mesg.event == dev->dev.power.power_state.event)
 787                 return 0;
 788
 789         switch (mesg.event) {
 790         case PM_EVENT_FREEZE:           /* about to take snapshot */
 791         case PM_EVENT_PRETHAW:          /* before restoring snapshot */
 792                 goto done;
 793         }
 794
 795         console_lock();
 796
 797         /* do nothing... */
 798
 799         console_unlock();
 800
 801 done:
 802         dev->dev.power.power_state = mesg;
 803
 804         return 0;
 805 }
 806 #else
 807 #define unifb_resume    NULL
 808 #define unifb_suspend   NULL
 809 #endif
 810
 811 static struct platform_driver unifb_driver = {
 812         .probe   = unifb_probe,
 813         .remove  = unifb_remove,
 814         .resume  = unifb_resume,
 815         .suspend = unifb_suspend,
 816         .driver  = {
 817                 .name   = "PKUnity-v3-UNIGFX",
 818         },
 819 };
 820
 821 static int __init unifb_init(void)
 822 {
 823 #ifndef MODULE
 824         if (fb_get_options("unifb", NULL))
 825                 return -ENODEV;
 826 #endif
 827
 828         return platform_driver_register(&unifb_driver);
 829 }
 830
 831 module_init(unifb_init);
 832
 833 static void __exit unifb_exit(void)
 834 {
 835         platform_driver_unregister(&unifb_driver);
 836 }
 837
 838 module_exit(unifb_exit);
 839
 840 MODULE_LICENSE("GPL v2");