drivers/video/s3c-fb.c

   1 /* linux/drivers/video/s3c-fb.c
   2  *
   3  * Copyright 2008 Openmoko Inc.
   4  * Copyright 2008-2010 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * Samsung SoC Framebuffer driver
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software FoundatIon.
  13 */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/slab.h>
  20 #include <linux/init.h>
  21 #include <linux/clk.h>
  22 #include <linux/fb.h>
  23 #include <linux/io.h>
  24
  25 #include <mach/map.h>
  26 #include <plat/regs-fb-v4.h>
  27 #include <plat/fb.h>
  28
  29 /* This driver will export a number of framebuffer interfaces depending
  30  * on the configuration passed in via the platform data. Each fb instance
  31  * maps to a hardware window. Currently there is no support for runtime
  32  * setting of the alpha-blending functions that each window has, so only
  33  * window 0 is actually useful.
  34  *
  35  * Window 0 is treated specially, it is used for the basis of the LCD
  36  * output timings and as the control for the output power-down state.
  37 */
  38
  39 /* note, the previous use of <mach/regs-fb.h> to get platform specific data
  40  * has been replaced by using the platform device name to pick the correct
  41  * configuration data for the system.
  42 */
  43
  44 #ifdef CONFIG_FB_S3C_DEBUG_REGWRITE
  45 #undef writel
  46 #define writel(v, r) do { \
  47         printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \
  48         __raw_writel(v, r); } while(0)
  49 #endif /* FB_S3C_DEBUG_REGWRITE */
  50
  51 struct s3c_fb;
  52
  53 #define VALID_BPP(x) (1 << ((x) - 1))
  54
  55 #define OSD_BASE(win, variant) ((variant).osd + ((win) * (variant).osd_stride))
  56 #define VIDOSD_A(win, variant) (OSD_BASE(win, variant) + 0x00)
  57 #define VIDOSD_B(win, variant) (OSD_BASE(win, variant) + 0x04)
  58 #define VIDOSD_C(win, variant) (OSD_BASE(win, variant) + 0x08)
  59 #define VIDOSD_D(win, variant) (OSD_BASE(win, variant) + 0x0C)
  60
  61 /**
  62  * struct s3c_fb_variant - fb variant information
  63  * @is_2443: Set if S3C2443/S3C2416 style hardware.
  64  * @nr_windows: The number of windows.
  65  * @vidtcon: The base for the VIDTCONx registers
  66  * @wincon: The base for the WINxCON registers.
  67  * @winmap: The base for the WINxMAP registers.
  68  * @keycon: The abse for the WxKEYCON registers.
  69  * @buf_start: Offset of buffer start registers.
  70  * @buf_size: Offset of buffer size registers.
  71  * @buf_end: Offset of buffer end registers.
  72  * @osd: The base for the OSD registers.
  73  * @palette: Address of palette memory, or 0 if none.
  74  */
  75 struct s3c_fb_variant {
  76         unsigned int    is_2443:1;
  77         unsigned short  nr_windows;
  78         unsigned short  vidtcon;
  79         unsigned short  wincon;
  80         unsigned short  winmap;
  81         unsigned short  keycon;
  82         unsigned short  buf_start;
  83         unsigned short  buf_end;
  84         unsigned short  buf_size;
  85         unsigned short  osd;
  86         unsigned short  osd_stride;
  87         unsigned short  palette[S3C_FB_MAX_WIN];
  88 };
  89
  90 /**
  91  * struct s3c_fb_win_variant
  92  * @has_osd_c: Set if has OSD C register.
  93  * @has_osd_d: Set if has OSD D register.
  94  * @palette_sz: Size of palette in entries.
  95  * @palette_16bpp: Set if palette is 16bits wide.
  96  * @valid_bpp: 1 bit per BPP setting to show valid bits-per-pixel.
  97  *
  98  * valid_bpp bit x is set if (x+1)BPP is supported.
  99  */
 100 struct s3c_fb_win_variant {
 101         unsigned int    has_osd_c:1;
 102         unsigned int    has_osd_d:1;
 103         unsigned int    palette_16bpp:1;
 104         unsigned short  palette_sz;
 105         u32             valid_bpp;
 106 };
 107
 108 /**
 109  * struct s3c_fb_driverdata - per-device type driver data for init time.
 110  * @variant: The variant information for this driver.
 111  * @win: The window information for each window.
 112  */
 113 struct s3c_fb_driverdata {
 114         struct s3c_fb_variant   variant;
 115         struct s3c_fb_win_variant *win[S3C_FB_MAX_WIN];
 116 };
 117
 118 /**
 119  * struct s3c_fb_win - per window private data for each framebuffer.
 120  * @windata: The platform data supplied for the window configuration.
 121  * @parent: The hardware that this window is part of.
 122  * @fbinfo: Pointer pack to the framebuffer info for this window.
 123  * @varint: The variant information for this window.
 124  * @palette_buffer: Buffer/cache to hold palette entries.
 125  * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/
 126  * @index: The window number of this window.
 127  * @palette: The bitfields for changing r/g/b into a hardware palette entry.
 128  */
 129 struct s3c_fb_win {
 130         struct s3c_fb_pd_win    *windata;
 131         struct s3c_fb           *parent;
 132         struct fb_info          *fbinfo;
 133         struct s3c_fb_palette    palette;
 134         struct s3c_fb_win_variant variant;
 135
 136         u32                     *palette_buffer;
 137         u32                      pseudo_palette[16];
 138         unsigned int             index;
 139 };
 140
 141 /**
 142  * struct s3c_fb - overall hardware state of the hardware
 143  * @dev: The device that we bound to, for printing, etc.
 144  * @regs_res: The resource we claimed for the IO registers.
 145  * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk.
 146  * @regs: The mapped hardware registers.
 147  * @variant: Variant information for this hardware.
 148  * @enabled: A bitmask of enabled hardware windows.
 149  * @pdata: The platform configuration data passed with the device.
 150  * @windows: The hardware windows that have been claimed.
 151  */
 152 struct s3c_fb {
 153         struct device           *dev;
 154         struct resource         *regs_res;
 155         struct clk              *bus_clk;
 156         void __iomem            *regs;
 157         struct s3c_fb_variant    variant;
 158
 159         unsigned char            enabled;
 160
 161         struct s3c_fb_platdata  *pdata;
 162         struct s3c_fb_win       *windows[S3C_FB_MAX_WIN];
 163 };
 164
 165 /**
 166  * s3c_fb_validate_win_bpp - validate the bits-per-pixel for this mode.
 167  * @win: The device window.
 168  * @bpp: The bit depth.
 169  */
 170 static bool s3c_fb_validate_win_bpp(struct s3c_fb_win *win, unsigned int bpp)
 171 {
 172         return win->variant.valid_bpp & VALID_BPP(bpp);
 173 }
 174
 175 /**
 176  * s3c_fb_check_var() - framebuffer layer request to verify a given mode.
 177  * @var: The screen information to verify.
 178  * @info: The framebuffer device.
 179  *
 180  * Framebuffer layer call to verify the given information and allow us to
 181  * update various information depending on the hardware capabilities.
 182  */
 183 static int s3c_fb_check_var(struct fb_var_screeninfo *var,
 184                             struct fb_info *info)
 185 {
 186         struct s3c_fb_win *win = info->par;
 187         struct s3c_fb_pd_win *windata = win->windata;
 188         struct s3c_fb *sfb = win->parent;
 189
 190         dev_dbg(sfb->dev, "checking parameters\n");
 191
 192         var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres);
 193         var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres);
 194
 195         if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) {
 196                 dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
 197                         win->index, var->bits_per_pixel);
 198                 return -EINVAL;
 199         }
 200
 201         /* always ensure these are zero, for drop through cases below */
 202         var->transp.offset = 0;
 203         var->transp.length = 0;
 204
 205         switch (var->bits_per_pixel) {
 206         case 1:
 207         case 2:
 208         case 4:
 209         case 8:
 210                 if (sfb->variant.palette[win->index] != 0) {
 211                         /* non palletised, A:1,R:2,G:3,B:2 mode */
 212                         var->red.offset         = 4;
 213                         var->green.offset       = 2;
 214                         var->blue.offset        = 0;
 215                         var->red.length         = 5;
 216                         var->green.length       = 3;
 217                         var->blue.length        = 2;
 218                         var->transp.offset      = 7;
 219                         var->transp.length      = 1;
 220                 } else {
 221                         var->red.offset = 0;
 222                         var->red.length = var->bits_per_pixel;
 223                         var->green      = var->red;
 224                         var->blue       = var->red;
 225                 }
 226                 break;
 227
 228         case 19:
 229                 /* 666 with one bit alpha/transparency */
 230                 var->transp.offset      = 18;
 231                 var->transp.length      = 1;
 232         case 18:
 233                 var->bits_per_pixel     = 32;
 234
 235                 /* 666 format */
 236                 var->red.offset         = 12;
 237                 var->green.offset       = 6;
 238                 var->blue.offset        = 0;
 239                 var->red.length         = 6;
 240                 var->green.length       = 6;
 241                 var->blue.length        = 6;
 242                 break;
 243
 244         case 16:
 245                 /* 16 bpp, 565 format */
 246                 var->red.offset         = 11;
 247                 var->green.offset       = 5;
 248                 var->blue.offset        = 0;
 249                 var->red.length         = 5;
 250                 var->green.length       = 6;
 251                 var->blue.length        = 5;
 252                 break;
 253
 254         case 28:
 255         case 25:
 256                 var->transp.length      = var->bits_per_pixel - 24;
 257                 var->transp.offset      = 24;
 258                 /* drop through */
 259         case 24:
 260                 /* our 24bpp is unpacked, so 32bpp */
 261                 var->bits_per_pixel     = 32;
 262         case 32:
 263                 var->red.offset         = 16;
 264                 var->red.length         = 8;
 265                 var->green.offset       = 8;
 266                 var->green.length       = 8;
 267                 var->blue.offset        = 0;
 268                 var->blue.length        = 8;
 269                 break;
 270
 271         default:
 272                 dev_err(sfb->dev, "invalid bpp\n");
 273         }
 274
 275         dev_dbg(sfb->dev, "%s: verified parameters\n", __func__);
 276         return 0;
 277 }
 278
 279 /**
 280  * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock.
 281  * @sfb: The hardware state.
 282  * @pixclock: The pixel clock wanted, in picoseconds.
 283  *
 284  * Given the specified pixel clock, work out the necessary divider to get
 285  * close to the output frequency.
 286  */
 287 static int s3c_fb_calc_pixclk(struct s3c_fb *sfb, unsigned int pixclk)
 288 {
 289         unsigned long clk = clk_get_rate(sfb->bus_clk);
 290         unsigned long long tmp;
 291         unsigned int result;
 292
 293         tmp = (unsigned long long)clk;
 294         tmp *= pixclk;
 295
 296         do_div(tmp, 1000000000UL);
 297         result = (unsigned int)tmp / 1000;
 298
 299         dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n",
 300                 pixclk, clk, result, clk / result);
 301
 302         return result;
 303 }
 304
 305 /**
 306  * s3c_fb_align_word() - align pixel count to word boundary
 307  * @bpp: The number of bits per pixel
 308  * @pix: The value to be aligned.
 309  *
 310  * Align the given pixel count so that it will start on an 32bit word
 311  * boundary.
 312  */
 313 static int s3c_fb_align_word(unsigned int bpp, unsigned int pix)
 314 {
 315         int pix_per_word;
 316
 317         if (bpp > 16)
 318                 return pix;
 319
 320         pix_per_word = (8 * 32) / bpp;
 321         return ALIGN(pix, pix_per_word);
 322 }
 323
 324 /**
 325  * s3c_fb_set_par() - framebuffer request to set new framebuffer state.
 326  * @info: The framebuffer to change.
 327  *
 328  * Framebuffer layer request to set a new mode for the specified framebuffer
 329  */
 330 static int s3c_fb_set_par(struct fb_info *info)
 331 {
 332         struct fb_var_screeninfo *var = &info->var;
 333         struct s3c_fb_win *win = info->par;
 334         struct s3c_fb *sfb = win->parent;
 335         void __iomem *regs = sfb->regs;
 336         void __iomem *buf = regs;
 337         int win_no = win->index;
 338         u32 osdc_data = 0;
 339         u32 data;
 340         u32 pagewidth;
 341         int clkdiv;
 342
 343         dev_dbg(sfb->dev, "setting framebuffer parameters\n");
 344
 345         switch (var->bits_per_pixel) {
 346         case 32:
 347         case 24:
 348         case 16:
 349         case 12:
 350                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 351                 break;
 352         case 8:
 353                 if (win->variant.palette_sz >= 256)
 354                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 355                 else
 356                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 357                 break;
 358         case 1:
 359                 info->fix.visual = FB_VISUAL_MONO01;
 360                 break;
 361         default:
 362                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 363                 break;
 364         }
 365
 366         info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
 367
 368         /* disable the window whilst we update it */
 369         writel(0, regs + WINCON(win_no));
 370
 371         /* use platform specified window as the basis for the lcd timings */
 372
 373         if (win_no == sfb->pdata->default_win) {
 374                 clkdiv = s3c_fb_calc_pixclk(sfb, var->pixclock);
 375
 376                 data = sfb->pdata->vidcon0;
 377                 data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
 378
 379                 if (clkdiv > 1)
 380                         data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR;
 381                 else
 382                         data &= ~VIDCON0_CLKDIR;        /* 1:1 clock */
 383
 384                 /* write the timing data to the panel */
 385
 386                 if (sfb->variant.is_2443)
 387                         data |= (1 << 5);
 388
 389                 data |= VIDCON0_ENVID | VIDCON0_ENVID_F;
 390                 writel(data, regs + VIDCON0);
 391
 392                 data = VIDTCON0_VBPD(var->upper_margin - 1) |
 393                        VIDTCON0_VFPD(var->lower_margin - 1) |
 394                        VIDTCON0_VSPW(var->vsync_len - 1);
 395
 396                 writel(data, regs + sfb->variant.vidtcon);
 397
 398                 data = VIDTCON1_HBPD(var->left_margin - 1) |
 399                        VIDTCON1_HFPD(var->right_margin - 1) |
 400                        VIDTCON1_HSPW(var->hsync_len - 1);
 401
 402                 /* VIDTCON1 */
 403                 writel(data, regs + sfb->variant.vidtcon + 4);
 404
 405                 data = VIDTCON2_LINEVAL(var->yres - 1) |
 406                        VIDTCON2_HOZVAL(var->xres - 1);
 407                 writel(data, regs +sfb->variant.vidtcon + 8 );
 408         }
 409
 410         /* write the buffer address */
 411
 412         /* start and end registers stride is 8 */
 413         buf = regs + win_no * 8;
 414
 415         writel(info->fix.smem_start, buf + sfb->variant.buf_start);
 416
 417         data = info->fix.smem_start + info->fix.line_length * var->yres;
 418         writel(data, buf + sfb->variant.buf_end);
 419
 420         pagewidth = (var->xres * var->bits_per_pixel) >> 3;
 421         data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) |
 422                VIDW_BUF_SIZE_PAGEWIDTH(pagewidth);
 423         writel(data, regs + sfb->variant.buf_size + (win_no * 4));
 424
 425         /* write 'OSD' registers to control position of framebuffer */
 426
 427         data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0);
 428         writel(data, regs + VIDOSD_A(win_no, sfb->variant));
 429
 430         data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel,
 431                                                      var->xres - 1)) |
 432                VIDOSDxB_BOTRIGHT_Y(var->yres - 1);
 433
 434         writel(data, regs + VIDOSD_B(win_no, sfb->variant));
 435
 436         data = var->xres * var->yres;
 437
 438         osdc_data = VIDISD14C_ALPHA1_R(0xf) |
 439                 VIDISD14C_ALPHA1_G(0xf) |
 440                 VIDISD14C_ALPHA1_B(0xf);
 441
 442         if (win->variant.has_osd_d) {
 443                 writel(data, regs + VIDOSD_D(win_no, sfb->variant));
 444                 writel(osdc_data, regs + VIDOSD_C(win_no, sfb->variant));
 445         } else
 446                 writel(data, regs + VIDOSD_C(win_no, sfb->variant));
 447
 448         data = WINCONx_ENWIN;
 449
 450         /* note, since we have to round up the bits-per-pixel, we end up
 451          * relying on the bitfield information for r/g/b/a to work out
 452          * exactly which mode of operation is intended. */
 453
 454         switch (var->bits_per_pixel) {
 455         case 1:
 456                 data |= WINCON0_BPPMODE_1BPP;
 457                 data |= WINCONx_BITSWP;
 458                 data |= WINCONx_BURSTLEN_4WORD;
 459                 break;
 460         case 2:
 461                 data |= WINCON0_BPPMODE_2BPP;
 462                 data |= WINCONx_BITSWP;
 463                 data |= WINCONx_BURSTLEN_8WORD;
 464                 break;
 465         case 4:
 466                 data |= WINCON0_BPPMODE_4BPP;
 467                 data |= WINCONx_BITSWP;
 468                 data |= WINCONx_BURSTLEN_8WORD;
 469                 break;
 470         case 8:
 471                 if (var->transp.length != 0)
 472                         data |= WINCON1_BPPMODE_8BPP_1232;
 473                 else
 474                         data |= WINCON0_BPPMODE_8BPP_PALETTE;
 475                 data |= WINCONx_BURSTLEN_8WORD;
 476                 data |= WINCONx_BYTSWP;
 477                 break;
 478         case 16:
 479                 if (var->transp.length != 0)
 480                         data |= WINCON1_BPPMODE_16BPP_A1555;
 481                 else
 482                         data |= WINCON0_BPPMODE_16BPP_565;
 483                 data |= WINCONx_HAWSWP;
 484                 data |= WINCONx_BURSTLEN_16WORD;
 485                 break;
 486         case 24:
 487         case 32:
 488                 if (var->red.length == 6) {
 489                         if (var->transp.length != 0)
 490                                 data |= WINCON1_BPPMODE_19BPP_A1666;
 491                         else
 492                                 data |= WINCON1_BPPMODE_18BPP_666;
 493                 } else if (var->transp.length == 1)
 494                         data |= WINCON1_BPPMODE_25BPP_A1888
 495                                 | WINCON1_BLD_PIX;
 496                 else if (var->transp.length == 4)
 497                         data |= WINCON1_BPPMODE_28BPP_A4888
 498                                 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
 499                 else
 500                         data |= WINCON0_BPPMODE_24BPP_888;
 501
 502                 data |= WINCONx_WSWP;
 503                 data |= WINCONx_BURSTLEN_16WORD;
 504                 break;
 505         }
 506
 507         /* Enable the colour keying for the window below this one */
 508         if (win_no > 0) {
 509                 u32 keycon0_data = 0, keycon1_data = 0;
 510                 void __iomem *keycon = regs + sfb->variant.keycon;
 511
 512                 keycon0_data = ~(WxKEYCON0_KEYBL_EN |
 513                                 WxKEYCON0_KEYEN_F |
 514                                 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 515
 516                 keycon1_data = WxKEYCON1_COLVAL(0xffffff);
 517
 518                 keycon += (win_no - 1) * 8;
 519
 520                 writel(keycon0_data, keycon + WKEYCON0);
 521                 writel(keycon1_data, keycon + WKEYCON1);
 522         }
 523
 524         writel(data, regs + sfb->variant.wincon + (win_no * 4));
 525         writel(0x0, regs + sfb->variant.winmap + (win_no * 4));
 526
 527         return 0;
 528 }
 529
 530 /**
 531  * s3c_fb_update_palette() - set or schedule a palette update.
 532  * @sfb: The hardware information.
 533  * @win: The window being updated.
 534  * @reg: The palette index being changed.
 535  * @value: The computed palette value.
 536  *
 537  * Change the value of a palette register, either by directly writing to
 538  * the palette (this requires the palette RAM to be disconnected from the
 539  * hardware whilst this is in progress) or schedule the update for later.
 540  *
 541  * At the moment, since we have no VSYNC interrupt support, we simply set
 542  * the palette entry directly.
 543  */
 544 static void s3c_fb_update_palette(struct s3c_fb *sfb,
 545                                   struct s3c_fb_win *win,
 546                                   unsigned int reg,
 547                                   u32 value)
 548 {
 549         void __iomem *palreg;
 550         u32 palcon;
 551
 552         palreg = sfb->regs + sfb->variant.palette[win->index];
 553
 554         dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n",
 555                 __func__, win->index, reg, palreg, value);
 556
 557         win->palette_buffer[reg] = value;
 558
 559         palcon = readl(sfb->regs + WPALCON);
 560         writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON);
 561
 562         if (win->variant.palette_16bpp)
 563                 writew(value, palreg + (reg * 2));
 564         else
 565                 writel(value, palreg + (reg * 4));
 566
 567         writel(palcon, sfb->regs + WPALCON);
 568 }
 569
 570 static inline unsigned int chan_to_field(unsigned int chan,
 571                                          struct fb_bitfield *bf)
 572 {
 573         chan &= 0xffff;
 574         chan >>= 16 - bf->length;
 575         return chan << bf->offset;
 576 }
 577
 578 /**
 579  * s3c_fb_setcolreg() - framebuffer layer request to change palette.
 580  * @regno: The palette index to change.
 581  * @red: The red field for the palette data.
 582  * @green: The green field for the palette data.
 583  * @blue: The blue field for the palette data.
 584  * @trans: The transparency (alpha) field for the palette data.
 585  * @info: The framebuffer being changed.
 586  */
 587 static int s3c_fb_setcolreg(unsigned regno,
 588                             unsigned red, unsigned green, unsigned blue,
 589                             unsigned transp, struct fb_info *info)
 590 {
 591         struct s3c_fb_win *win = info->par;
 592         struct s3c_fb *sfb = win->parent;
 593         unsigned int val;
 594
 595         dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n",
 596                 __func__, win->index, regno, red, green, blue);
 597
 598         switch (info->fix.visual) {
 599         case FB_VISUAL_TRUECOLOR:
 600                 /* true-colour, use pseudo-palette */
 601
 602                 if (regno < 16) {
 603                         u32 *pal = info->pseudo_palette;
 604
 605                         val  = chan_to_field(red,   &info->var.red);
 606                         val |= chan_to_field(green, &info->var.green);
 607                         val |= chan_to_field(blue,  &info->var.blue);
 608
 609                         pal[regno] = val;
 610                 }
 611                 break;
 612
 613         case FB_VISUAL_PSEUDOCOLOR:
 614                 if (regno < win->variant.palette_sz) {
 615                         val  = chan_to_field(red, &win->palette.r);
 616                         val |= chan_to_field(green, &win->palette.g);
 617                         val |= chan_to_field(blue, &win->palette.b);
 618
 619                         s3c_fb_update_palette(sfb, win, regno, val);
 620                 }
 621
 622                 break;
 623
 624         default:
 625                 return 1;       /* unknown type */
 626         }
 627
 628         return 0;
 629 }
 630
 631 /**
 632  * s3c_fb_enable() - Set the state of the main LCD output
 633  * @sfb: The main framebuffer state.
 634  * @enable: The state to set.
 635  */
 636 static void s3c_fb_enable(struct s3c_fb *sfb, int enable)
 637 {
 638         u32 vidcon0 = readl(sfb->regs + VIDCON0);
 639
 640         if (enable)
 641                 vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
 642         else {
 643                 /* see the note in the framebuffer datasheet about
 644                  * why you cannot take both of these bits down at the
 645                  * same time. */
 646
 647                 if (!(vidcon0 & VIDCON0_ENVID))
 648                         return;
 649
 650                 vidcon0 |= VIDCON0_ENVID;
 651                 vidcon0 &= ~VIDCON0_ENVID_F;
 652         }
 653
 654         writel(vidcon0, sfb->regs + VIDCON0);
 655 }
 656
 657 /**
 658  * s3c_fb_blank() - blank or unblank the given window
 659  * @blank_mode: The blank state from FB_BLANK_*
 660  * @info: The framebuffer to blank.
 661  *
 662  * Framebuffer layer request to change the power state.
 663  */
 664 static int s3c_fb_blank(int blank_mode, struct fb_info *info)
 665 {
 666         struct s3c_fb_win *win = info->par;
 667         struct s3c_fb *sfb = win->parent;
 668         unsigned int index = win->index;
 669         u32 wincon;
 670
 671         dev_dbg(sfb->dev, "blank mode %d\n", blank_mode);
 672
 673         wincon = readl(sfb->regs + sfb->variant.wincon + (index * 4));
 674
 675         switch (blank_mode) {
 676         case FB_BLANK_POWERDOWN:
 677                 wincon &= ~WINCONx_ENWIN;
 678                 sfb->enabled &= ~(1 << index);
 679                 /* fall through to FB_BLANK_NORMAL */
 680
 681         case FB_BLANK_NORMAL:
 682                 /* disable the DMA and display 0x0 (black) */
 683                 writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0),
 684                        sfb->regs + sfb->variant.winmap + (index * 4));
 685                 break;
 686
 687         case FB_BLANK_UNBLANK:
 688                 writel(0x0, sfb->regs + sfb->variant.winmap + (index * 4));
 689                 wincon |= WINCONx_ENWIN;
 690                 sfb->enabled |= (1 << index);
 691                 break;
 692
 693         case FB_BLANK_VSYNC_SUSPEND:
 694         case FB_BLANK_HSYNC_SUSPEND:
 695         default:
 696                 return 1;
 697         }
 698
 699         writel(wincon, sfb->regs + sfb->variant.wincon + (index * 4));
 700
 701         /* Check the enabled state to see if we need to be running the
 702          * main LCD interface, as if there are no active windows then
 703          * it is highly likely that we also do not need to output
 704          * anything.
 705          */
 706
 707         /* We could do something like the following code, but the current
 708          * system of using framebuffer events means that we cannot make
 709          * the distinction between just window 0 being inactive and all
 710          * the windows being down.
 711          *
 712          * s3c_fb_enable(sfb, sfb->enabled ? 1 : 0);
 713         */
 714
 715         /* we're stuck with this until we can do something about overriding
 716          * the power control using the blanking event for a single fb.
 717          */
 718         if (index == sfb->pdata->default_win)
 719                 s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0);
 720
 721         return 0;
 722 }
 723
 724 static struct fb_ops s3c_fb_ops = {
 725         .owner          = THIS_MODULE,
 726         .fb_check_var   = s3c_fb_check_var,
 727         .fb_set_par     = s3c_fb_set_par,
 728         .fb_blank       = s3c_fb_blank,
 729         .fb_setcolreg   = s3c_fb_setcolreg,
 730         .fb_fillrect    = cfb_fillrect,
 731         .fb_copyarea    = cfb_copyarea,
 732         .fb_imageblit   = cfb_imageblit,
 733 };
 734
 735 /**
 736  * s3c_fb_alloc_memory() - allocate display memory for framebuffer window
 737  * @sfb: The base resources for the hardware.
 738  * @win: The window to initialise memory for.
 739  *
 740  * Allocate memory for the given framebuffer.
 741  */
 742 static int __devinit s3c_fb_alloc_memory(struct s3c_fb *sfb,
 743                                          struct s3c_fb_win *win)
 744 {
 745         struct s3c_fb_pd_win *windata = win->windata;
 746         unsigned int real_size, virt_size, size;
 747         struct fb_info *fbi = win->fbinfo;
 748         dma_addr_t map_dma;
 749
 750         dev_dbg(sfb->dev, "allocating memory for display\n");
 751
 752         real_size = windata->win_mode.xres * windata->win_mode.yres;
 753         virt_size = windata->virtual_x * windata->virtual_y;
 754
 755         dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n",
 756                 real_size, windata->win_mode.xres, windata->win_mode.yres,
 757                 virt_size, windata->virtual_x, windata->virtual_y);
 758
 759         size = (real_size > virt_size) ? real_size : virt_size;
 760         size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp;
 761         size /= 8;
 762
 763         fbi->fix.smem_len = size;
 764         size = PAGE_ALIGN(size);
 765
 766         dev_dbg(sfb->dev, "want %u bytes for window\n", size);
 767
 768         fbi->screen_base = dma_alloc_writecombine(sfb->dev, size,
 769                                                   &map_dma, GFP_KERNEL);
 770         if (!fbi->screen_base)
 771                 return -ENOMEM;
 772
 773         dev_dbg(sfb->dev, "mapped %x to %p\n",
 774                 (unsigned int)map_dma, fbi->screen_base);
 775
 776         memset(fbi->screen_base, 0x0, size);
 777         fbi->fix.smem_start = map_dma;
 778
 779         return 0;
 780 }
 781
 782 /**
 783  * s3c_fb_free_memory() - free the display memory for the given window
 784  * @sfb: The base resources for the hardware.
 785  * @win: The window to free the display memory for.
 786  *
 787  * Free the display memory allocated by s3c_fb_alloc_memory().
 788  */
 789 static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win)
 790 {
 791         struct fb_info *fbi = win->fbinfo;
 792
 793         dma_free_writecombine(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len),
 794                               fbi->screen_base, fbi->fix.smem_start);
 795 }
 796
 797 /**
 798  * s3c_fb_release_win() - release resources for a framebuffer window.
 799  * @win: The window to cleanup the resources for.
 800  *
 801  * Release the resources that where claimed for the hardware window,
 802  * such as the framebuffer instance and any memory claimed for it.
 803  */
 804 static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win)
 805 {
 806         if (win->fbinfo) {
 807                 unregister_framebuffer(win->fbinfo);
 808                 fb_dealloc_cmap(&win->fbinfo->cmap);
 809                 s3c_fb_free_memory(sfb, win);
 810                 framebuffer_release(win->fbinfo);
 811         }
 812 }
 813
 814 /**
 815  * s3c_fb_probe_win() - register an hardware window
 816  * @sfb: The base resources for the hardware
 817  * @variant: The variant information for this window.
 818  * @res: Pointer to where to place the resultant window.
 819  *
 820  * Allocate and do the basic initialisation for one of the hardware's graphics
 821  * windows.
 822  */
 823 static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
 824                                       struct s3c_fb_win_variant *variant,
 825                                       struct s3c_fb_win **res)
 826 {
 827         struct fb_var_screeninfo *var;
 828         struct fb_videomode *initmode;
 829         struct s3c_fb_pd_win *windata;
 830         struct s3c_fb_win *win;
 831         struct fb_info *fbinfo;
 832         int palette_size;
 833         int ret;
 834
 835         dev_dbg(sfb->dev, "probing window %d, variant %p\n", win_no, variant);
 836
 837         palette_size = variant->palette_sz * 4;
 838
 839         fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) +
 840                                    palette_size * sizeof(u32), sfb->dev);
 841         if (!fbinfo) {
 842                 dev_err(sfb->dev, "failed to allocate framebuffer\n");
 843                 return -ENOENT;
 844         }
 845
 846         windata = sfb->pdata->win[win_no];
 847         initmode = &windata->win_mode;
 848
 849         WARN_ON(windata->max_bpp == 0);
 850         WARN_ON(windata->win_mode.xres == 0);
 851         WARN_ON(windata->win_mode.yres == 0);
 852
 853         win = fbinfo->par;
 854         var = &fbinfo->var;
 855         win->variant = *variant;
 856         win->fbinfo = fbinfo;
 857         win->parent = sfb;
 858         win->windata = windata;
 859         win->index = win_no;
 860         win->palette_buffer = (u32 *)(win + 1);
 861
 862         ret = s3c_fb_alloc_memory(sfb, win);
 863         if (ret) {
 864                 dev_err(sfb->dev, "failed to allocate display memory\n");
 865                 return ret;
 866         }
 867
 868         /* setup the r/b/g positions for the window's palette */
 869         s3c_fb_init_palette(win_no, &win->palette);
 870
 871         /* setup the initial video mode from the window */
 872         fb_videomode_to_var(&fbinfo->var, initmode);
 873
 874         fbinfo->fix.type        = FB_TYPE_PACKED_PIXELS;
 875         fbinfo->fix.accel       = FB_ACCEL_NONE;
 876         fbinfo->var.activate    = FB_ACTIVATE_NOW;
 877         fbinfo->var.vmode       = FB_VMODE_NONINTERLACED;
 878         fbinfo->var.bits_per_pixel = windata->default_bpp;
 879         fbinfo->fbops           = &s3c_fb_ops;
 880         fbinfo->flags           = FBINFO_FLAG_DEFAULT;
 881         fbinfo->pseudo_palette  = &win->pseudo_palette;
 882
 883         /* prepare to actually start the framebuffer */
 884
 885         ret = s3c_fb_check_var(&fbinfo->var, fbinfo);
 886         if (ret < 0) {
 887                 dev_err(sfb->dev, "check_var failed on initial video params\n");
 888                 return ret;
 889         }
 890
 891         /* create initial colour map */
 892
 893         ret = fb_alloc_cmap(&fbinfo->cmap, win->variant.palette_sz, 1);
 894         if (ret == 0)
 895                 fb_set_cmap(&fbinfo->cmap, fbinfo);
 896         else
 897                 dev_err(sfb->dev, "failed to allocate fb cmap\n");
 898
 899         s3c_fb_set_par(fbinfo);
 900
 901         dev_dbg(sfb->dev, "about to register framebuffer\n");
 902
 903         /* run the check_var and set_par on our configuration. */
 904
 905         ret = register_framebuffer(fbinfo);
 906         if (ret < 0) {
 907                 dev_err(sfb->dev, "failed to register framebuffer\n");
 908                 return ret;
 909         }
 910
 911         *res = win;
 912         dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id);
 913
 914         return 0;
 915 }
 916
 917 /**
 918  * s3c_fb_clear_win() - clear hardware window registers.
 919  * @sfb: The base resources for the hardware.
 920  * @win: The window to process.
 921  *
 922  * Reset the specific window registers to a known state.
 923  */
 924 static void s3c_fb_clear_win(struct s3c_fb *sfb, int win)
 925 {
 926         void __iomem *regs = sfb->regs;
 927
 928         writel(0, regs + sfb->variant.wincon + (win * 4));
 929         writel(0, regs + VIDOSD_A(win, sfb->variant));
 930         writel(0, regs + VIDOSD_B(win, sfb->variant));
 931         writel(0, regs + VIDOSD_C(win, sfb->variant));
 932 }
 933
 934 static int __devinit s3c_fb_probe(struct platform_device *pdev)
 935 {
 936         struct s3c_fb_driverdata *fbdrv;
 937         struct device *dev = &pdev->dev;
 938         struct s3c_fb_platdata *pd;
 939         struct s3c_fb *sfb;
 940         struct resource *res;
 941         int win;
 942         int ret = 0;
 943
 944         fbdrv = (struct s3c_fb_driverdata *)platform_get_device_id(pdev)->driver_data;
 945
 946         if (fbdrv->variant.nr_windows > S3C_FB_MAX_WIN) {
 947                 dev_err(dev, "too many windows, cannot attach\n");
 948                 return -EINVAL;
 949         }
 950
 951         pd = pdev->dev.platform_data;
 952         if (!pd) {
 953                 dev_err(dev, "no platform data specified\n");
 954                 return -EINVAL;
 955         }
 956
 957         sfb = kzalloc(sizeof(struct s3c_fb), GFP_KERNEL);
 958         if (!sfb) {
 959                 dev_err(dev, "no memory for framebuffers\n");
 960                 return -ENOMEM;
 961         }
 962
 963         dev_dbg(dev, "allocate new framebuffer %p\n", sfb);
 964
 965         sfb->dev = dev;
 966         sfb->pdata = pd;
 967         sfb->variant = fbdrv->variant;
 968
 969         sfb->bus_clk = clk_get(dev, "lcd");
 970         if (IS_ERR(sfb->bus_clk)) {
 971                 dev_err(dev, "failed to get bus clock\n");
 972                 goto err_sfb;
 973         }
 974
 975         clk_enable(sfb->bus_clk);
 976
 977         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 978         if (!res) {
 979                 dev_err(dev, "failed to find registers\n");
 980                 ret = -ENOENT;
 981                 goto err_clk;
 982         }
 983
 984         sfb->regs_res = request_mem_region(res->start, resource_size(res),
 985                                            dev_name(dev));
 986         if (!sfb->regs_res) {
 987                 dev_err(dev, "failed to claim register region\n");
 988                 ret = -ENOENT;
 989                 goto err_clk;
 990         }
 991
 992         sfb->regs = ioremap(res->start, resource_size(res));
 993         if (!sfb->regs) {
 994                 dev_err(dev, "failed to map registers\n");
 995                 ret = -ENXIO;
 996                 goto err_req_region;
 997         }
 998
 999         dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs);
1000
1001         /* setup gpio and output polarity controls */
1002
1003         pd->setup_gpio();
1004
1005         writel(pd->vidcon1, sfb->regs + VIDCON1);
1006
1007         /* zero all windows before we do anything */
1008
1009         for (win = 0; win < fbdrv->variant.nr_windows; win++)
1010                 s3c_fb_clear_win(sfb, win);
1011
1012         /* initialise colour key controls */
1013         for (win = 0; win < (fbdrv->variant.nr_windows - 1); win++) {
1014                 void __iomem *regs = sfb->regs + sfb->variant.keycon;
1015
1016                 regs += (win * 8);
1017                 writel(0xffffff, regs + WKEYCON0);
1018                 writel(0xffffff, regs + WKEYCON1);
1019         }
1020
1021         /* we have the register setup, start allocating framebuffers */
1022
1023         for (win = 0; win < fbdrv->variant.nr_windows; win++) {
1024                 if (!pd->win[win])
1025                         continue;
1026
1027                 ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win],
1028                                        &sfb->windows[win]);
1029                 if (ret < 0) {
1030                         dev_err(dev, "failed to create window %d\n", win);
1031                         for (; win >= 0; win--)
1032                                 s3c_fb_release_win(sfb, sfb->windows[win]);
1033                         goto err_ioremap;
1034                 }
1035         }
1036
1037         platform_set_drvdata(pdev, sfb);
1038
1039         return 0;
1040
1041 err_ioremap:
1042         iounmap(sfb->regs);
1043
1044 err_req_region:
1045         release_resource(sfb->regs_res);
1046         kfree(sfb->regs_res);
1047
1048 err_clk:
1049         clk_disable(sfb->bus_clk);
1050         clk_put(sfb->bus_clk);
1051
1052 err_sfb:
1053         kfree(sfb);
1054         return ret;
1055 }
1056
1057 /**
1058  * s3c_fb_remove() - Cleanup on module finalisation
1059  * @pdev: The platform device we are bound to.
1060  *
1061  * Shutdown and then release all the resources that the driver allocated
1062  * on initialisation.
1063  */
1064 static int __devexit s3c_fb_remove(struct platform_device *pdev)
1065 {
1066         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1067         int win;
1068
1069         for (win = 0; win < S3C_FB_MAX_WIN; win++)
1070                 if (sfb->windows[win])
1071                         s3c_fb_release_win(sfb, sfb->windows[win]);
1072
1073         iounmap(sfb->regs);
1074
1075         clk_disable(sfb->bus_clk);
1076         clk_put(sfb->bus_clk);
1077
1078         release_resource(sfb->regs_res);
1079         kfree(sfb->regs_res);
1080
1081         kfree(sfb);
1082
1083         return 0;
1084 }
1085
1086 #ifdef CONFIG_PM
1087 static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state)
1088 {
1089         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1090         struct s3c_fb_win *win;
1091         int win_no;
1092
1093         for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) {
1094                 win = sfb->windows[win_no];
1095                 if (!win)
1096                         continue;
1097
1098                 /* use the blank function to push into power-down */
1099                 s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo);
1100         }
1101
1102         clk_disable(sfb->bus_clk);
1103         return 0;
1104 }
1105
1106 static int s3c_fb_resume(struct platform_device *pdev)
1107 {
1108         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1109         struct s3c_fb_platdata *pd = sfb->pdata;
1110         struct s3c_fb_win *win;
1111         int win_no;
1112
1113         clk_enable(sfb->bus_clk);
1114
1115         /* setup registers */
1116         writel(pd->vidcon1, sfb->regs + VIDCON1);
1117
1118         /* zero all windows before we do anything */
1119         for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++)
1120                 s3c_fb_clear_win(sfb, win_no);
1121
1122         for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) {
1123                 void __iomem *regs = sfb->regs + sfb->variant.keycon;
1124
1125                 regs += (win_no * 8);
1126                 writel(0xffffff, regs + WKEYCON0);
1127                 writel(0xffffff, regs + WKEYCON1);
1128         }
1129
1130         /* restore framebuffers */
1131         for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) {
1132                 win = sfb->windows[win_no];
1133                 if (!win)
1134                         continue;
1135
1136                 dev_dbg(&pdev->dev, "resuming window %d\n", win_no);
1137                 s3c_fb_set_par(win->fbinfo);
1138         }
1139
1140         return 0;
1141 }
1142 #else
1143 #define s3c_fb_suspend NULL
1144 #define s3c_fb_resume  NULL
1145 #endif
1146
1147
1148 #define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4))
1149 #define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8))
1150
1151 static struct s3c_fb_win_variant s3c_fb_data_64xx_wins[] __devinitdata = {
1152         [0] = {
1153                 .has_osd_c      = 1,
1154                 .palette_sz     = 256,
1155                 .valid_bpp      = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24),
1156         },
1157         [1] = {
1158                 .has_osd_c      = 1,
1159                 .has_osd_d      = 1,
1160                 .palette_sz     = 256,
1161                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1162                                    VALID_BPP(18) | VALID_BPP(19) |
1163                                    VALID_BPP(24) | VALID_BPP(25)),
1164         },
1165         [2] = {
1166                 .has_osd_c      = 1,
1167                 .has_osd_d      = 1,
1168                 .palette_sz     = 16,
1169                 .palette_16bpp  = 1,
1170                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1171                                    VALID_BPP(18) | VALID_BPP(19) |
1172                                    VALID_BPP(24) | VALID_BPP(25)),
1173         },
1174         [3] = {
1175                 .has_osd_c      = 1,
1176                 .has_osd_d      = 1,
1177                 .palette_sz     = 16,
1178                 .palette_16bpp  = 1,
1179                 .valid_bpp      = (VALID_BPP124  | VALID_BPP(16) |
1180                                    VALID_BPP(18) | VALID_BPP(19) |
1181                                    VALID_BPP(24) | VALID_BPP(25)),
1182         },
1183         [4] = {
1184                 .has_osd_c      = 1,
1185                 .palette_sz     = 4,
1186                 .palette_16bpp  = 1,
1187                 .valid_bpp      = (VALID_BPP(1) | VALID_BPP(2) |
1188                                    VALID_BPP(16) | VALID_BPP(18) |
1189                                    VALID_BPP(24) | VALID_BPP(25)),
1190         },
1191 };
1192
1193 static struct s3c_fb_driverdata s3c_fb_data_64xx __devinitdata = {
1194         .variant = {
1195                 .nr_windows     = 5,
1196                 .vidtcon        = VIDTCON0,
1197                 .wincon         = WINCON(0),
1198                 .winmap         = WINxMAP(0),
1199                 .keycon         = WKEYCON,
1200                 .osd            = VIDOSD_BASE,
1201                 .osd_stride     = 16,
1202                 .buf_start      = VIDW_BUF_START(0),
1203                 .buf_size       = VIDW_BUF_SIZE(0),
1204                 .buf_end        = VIDW_BUF_END(0),
1205
1206                 .palette = {
1207                         [0] = 0x400,
1208                         [1] = 0x800,
1209                         [2] = 0x300,
1210                         [3] = 0x320,
1211                         [4] = 0x340,
1212                 },
1213         },
1214         .win[0] = &s3c_fb_data_64xx_wins[0],
1215         .win[1] = &s3c_fb_data_64xx_wins[1],
1216         .win[2] = &s3c_fb_data_64xx_wins[2],
1217         .win[3] = &s3c_fb_data_64xx_wins[3],
1218         .win[4] = &s3c_fb_data_64xx_wins[4],
1219 };
1220
1221 static struct s3c_fb_driverdata s3c_fb_data_s5p __devinitdata = {
1222         .variant = {
1223                 .nr_windows     = 5,
1224                 .vidtcon        = VIDTCON0,
1225                 .wincon         = WINCON(0),
1226                 .winmap         = WINxMAP(0),
1227                 .keycon         = WKEYCON,
1228                 .osd            = VIDOSD_BASE,
1229                 .osd_stride     = 16,
1230                 .buf_start      = VIDW_BUF_START(0),
1231                 .buf_size       = VIDW_BUF_SIZE(0),
1232                 .buf_end        = VIDW_BUF_END(0),
1233
1234                 .palette = {
1235                         [0] = 0x2400,
1236                         [1] = 0x2800,
1237                         [2] = 0x2c00,
1238                         [3] = 0x3000,
1239                         [4] = 0x3400,
1240                 },
1241         },
1242         .win[0] = &s3c_fb_data_64xx_wins[0],
1243         .win[1] = &s3c_fb_data_64xx_wins[1],
1244         .win[2] = &s3c_fb_data_64xx_wins[2],
1245         .win[3] = &s3c_fb_data_64xx_wins[3],
1246         .win[4] = &s3c_fb_data_64xx_wins[4],
1247 };
1248
1249 /* S3C2443/S3C2416 style hardware */
1250 static struct s3c_fb_driverdata s3c_fb_data_s3c2443 __devinitdata = {
1251         .variant = {
1252                 .nr_windows     = 2,
1253                 .is_2443        = 1,
1254
1255                 .vidtcon        = 0x08,
1256                 .wincon         = 0x14,
1257                 .winmap         = 0xd0,
1258                 .keycon         = 0xb0,
1259                 .osd            = 0x28,
1260                 .osd_stride     = 12,
1261                 .buf_start      = 0x64,
1262                 .buf_size       = 0x94,
1263                 .buf_end        = 0x7c,
1264
1265                 .palette = {
1266                         [0] = 0x400,
1267                         [1] = 0x800,
1268                 },
1269         },
1270         .win[0] = &(struct s3c_fb_win_variant) {
1271                 .palette_sz     = 256,
1272                 .valid_bpp      = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24),
1273         },
1274         .win[1] = &(struct s3c_fb_win_variant) {
1275                 .has_osd_c      = 1,
1276                 .palette_sz     = 256,
1277                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1278                                    VALID_BPP(18) | VALID_BPP(19) |
1279                                    VALID_BPP(24) | VALID_BPP(25) |
1280                                    VALID_BPP(28)),
1281         },
1282 };
1283
1284 static struct platform_device_id s3c_fb_driver_ids[] = {
1285         {
1286                 .name           = "s3c-fb",
1287                 .driver_data    = (unsigned long)&s3c_fb_data_64xx,
1288         }, {
1289                 .name           = "s5p-fb",
1290                 .driver_data    = (unsigned long)&s3c_fb_data_s5p,
1291         }, {
1292                 .name           = "s3c2443-fb",
1293                 .driver_data    = (unsigned long)&s3c_fb_data_s3c2443,
1294         },
1295         {},
1296 };
1297 MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids);
1298
1299 static struct platform_driver s3c_fb_driver = {
1300         .probe          = s3c_fb_probe,
1301         .remove         = __devexit_p(s3c_fb_remove),
1302         .suspend        = s3c_fb_suspend,
1303         .resume         = s3c_fb_resume,
1304         .id_table       = s3c_fb_driver_ids,
1305         .driver         = {
1306                 .name   = "s3c-fb",
1307                 .owner  = THIS_MODULE,
1308         },
1309 };
1310
1311 static int __init s3c_fb_init(void)
1312 {
1313         return platform_driver_register(&s3c_fb_driver);
1314 }
1315
1316 static void __exit s3c_fb_cleanup(void)
1317 {
1318         platform_driver_unregister(&s3c_fb_driver);
1319 }
1320
1321 module_init(s3c_fb_init);
1322 module_exit(s3c_fb_cleanup);
1323
1324 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1325 MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver");
1326 MODULE_LICENSE("GPL");
1327 MODULE_ALIAS("platform:s3c-fb");