drivers/video/sa1100fb.c

   1 /*
   2  *  linux/drivers/video/sa1100fb.c
   3  *
   4  *  Copyright (C) 1999 Eric A. Thomas
   5  *   Based on acornfb.c Copyright (C) Russell King.
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file COPYING in the main directory of this archive for
   9  * more details.
  10  *
  11  *              StrongARM 1100 LCD Controller Frame Buffer Driver
  12  *
  13  * Please direct your questions and comments on this driver to the following
  14  * email address:
  15  *
  16  *      linux-arm-kernel@lists.arm.linux.org.uk
  17  *
  18  * Clean patches should be sent to the ARM Linux Patch System.  Please see the
  19  * following web page for more information:
  20  *
  21  *      http://www.arm.linux.org.uk/developer/patches/info.shtml
  22  *
  23  * Thank you.
  24  *
  25  * Known problems:
  26  *      - With the Neponset plugged into an Assabet, LCD powerdown
  27  *        doesn't work (LCD stays powered up).  Therefore we shouldn't
  28  *        blank the screen.
  29  *      - We don't limit the CPU clock rate nor the mode selection
  30  *        according to the available SDRAM bandwidth.
  31  *
  32  * Other notes:
  33  *      - Linear grayscale palettes and the kernel.
  34  *        Such code does not belong in the kernel.  The kernel frame buffer
  35  *        drivers do not expect a linear colourmap, but a colourmap based on
  36  *        the VT100 standard mapping.
  37  *
  38  *        If your _userspace_ requires a linear colourmap, then the setup of
  39  *        such a colourmap belongs _in userspace_, not in the kernel.  Code
  40  *        to set the colourmap correctly from user space has been sent to
  41  *        David Neuer.  It's around 8 lines of C code, plus another 4 to
  42  *        detect if we are using grayscale.
  43  *
  44  *      - The following must never be specified in a panel definition:
  45  *           LCCR0_LtlEnd, LCCR3_PixClkDiv, LCCR3_VrtSnchL, LCCR3_HorSnchL
  46  *
  47  *      - The following should be specified:
  48  *           either LCCR0_Color or LCCR0_Mono
  49  *           either LCCR0_Sngl or LCCR0_Dual
  50  *           either LCCR0_Act or LCCR0_Pas
  51  *           either LCCR3_OutEnH or LCCD3_OutEnL
  52  *           either LCCR3_PixRsEdg or LCCR3_PixFlEdg
  53  *           either LCCR3_ACBsDiv or LCCR3_ACBsCntOff
  54  *
  55  * Code Status:
  56  * 1999/04/01:
  57  *      - Driver appears to be working for Brutus 320x200x8bpp mode.  Other
  58  *        resolutions are working, but only the 8bpp mode is supported.
  59  *        Changes need to be made to the palette encode and decode routines
  60  *        to support 4 and 16 bpp modes.
  61  *        Driver is not designed to be a module.  The FrameBuffer is statically
  62  *        allocated since dynamic allocation of a 300k buffer cannot be
  63  *        guaranteed.
  64  *
  65  * 1999/06/17:
  66  *      - FrameBuffer memory is now allocated at run-time when the
  67  *        driver is initialized.
  68  *
  69  * 2000/04/10: Nicolas Pitre <nico@fluxnic.net>
  70  *      - Big cleanup for dynamic selection of machine type at run time.
  71  *
  72  * 2000/07/19: Jamey Hicks <jamey@crl.dec.com>
  73  *      - Support for Bitsy aka Compaq iPAQ H3600 added.
  74  *
  75  * 2000/08/07: Tak-Shing Chan <tchan.rd@idthk.com>
  76  *             Jeff Sutherland <jsutherland@accelent.com>
  77  *      - Resolved an issue caused by a change made to the Assabet's PLD
  78  *        earlier this year which broke the framebuffer driver for newer
  79  *        Phase 4 Assabets.  Some other parameters were changed to optimize
  80  *        for the Sharp display.
  81  *
  82  * 2000/08/09: Kunihiko IMAI <imai@vasara.co.jp>
  83  *      - XP860 support added
  84  *
  85  * 2000/08/19: Mark Huang <mhuang@livetoy.com>
  86  *      - Allows standard options to be passed on the kernel command line
  87  *        for most common passive displays.
  88  *
  89  * 2000/08/29:
  90  *      - s/save_flags_cli/local_irq_save/
  91  *      - remove unneeded extra save_flags_cli in sa1100fb_enable_lcd_controller
  92  *
  93  * 2000/10/10: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
  94  *      - Updated LART stuff. Fixed some minor bugs.
  95  *
  96  * 2000/10/30: Murphy Chen <murphy@mail.dialogue.com.tw>
  97  *      - Pangolin support added
  98  *
  99  * 2000/10/31: Roman Jordan <jor@hoeft-wessel.de>
 100  *      - Huw Webpanel support added
 101  *
 102  * 2000/11/23: Eric Peng <ericpeng@coventive.com>
 103  *      - Freebird add
 104  *
 105  * 2001/02/07: Jamey Hicks <jamey.hicks@compaq.com>
 106  *             Cliff Brake <cbrake@accelent.com>
 107  *      - Added PM callback
 108  *
 109  * 2001/05/26: <rmk@arm.linux.org.uk>
 110  *      - Fix 16bpp so that (a) we use the right colours rather than some
 111  *        totally random colour depending on what was in page 0, and (b)
 112  *        we don't de-reference a NULL pointer.
 113  *      - remove duplicated implementation of consistent_alloc()
 114  *      - convert dma address types to dma_addr_t
 115  *      - remove unused 'montype' stuff
 116  *      - remove redundant zero inits of init_var after the initial
 117  *        memset.
 118  *      - remove allow_modeset (acornfb idea does not belong here)
 119  *
 120  * 2001/05/28: <rmk@arm.linux.org.uk>
 121  *      - massive cleanup - move machine dependent data into structures
 122  *      - I've left various #warnings in - if you see one, and know
 123  *        the hardware concerned, please get in contact with me.
 124  *
 125  * 2001/05/31: <rmk@arm.linux.org.uk>
 126  *      - Fix LCCR1 HSW value, fix all machine type specifications to
 127  *        keep values in line.  (Please check your machine type specs)
 128  *
 129  * 2001/06/10: <rmk@arm.linux.org.uk>
 130  *      - Fiddle with the LCD controller from task context only; mainly
 131  *        so that we can run with interrupts on, and sleep.
 132  *      - Convert #warnings into #errors.  No pain, no gain. ;)
 133  *
 134  * 2001/06/14: <rmk@arm.linux.org.uk>
 135  *      - Make the palette BPS value for 12bpp come out correctly.
 136  *      - Take notice of "greyscale" on any colour depth.
 137  *      - Make truecolor visuals use the RGB channel encoding information.
 138  *
 139  * 2001/07/02: <rmk@arm.linux.org.uk>
 140  *      - Fix colourmap problems.
 141  *
 142  * 2001/07/13: <abraham@2d3d.co.za>
 143  *      - Added support for the ICP LCD-Kit01 on LART. This LCD is
 144  *        manufactured by Prime View, model no V16C6448AB
 145  *
 146  * 2001/07/23: <rmk@arm.linux.org.uk>
 147  *      - Hand merge version from handhelds.org CVS tree.  See patch
 148  *        notes for 595/1 for more information.
 149  *      - Drop 12bpp (it's 16bpp with different colour register mappings).
 150  *      - This hardware can not do direct colour.  Therefore we don't
 151  *        support it.
 152  *
 153  * 2001/07/27: <rmk@arm.linux.org.uk>
 154  *      - Halve YRES on dual scan LCDs.
 155  *
 156  * 2001/08/22: <rmk@arm.linux.org.uk>
 157  *      - Add b/w iPAQ pixclock value.
 158  *
 159  * 2001/10/12: <rmk@arm.linux.org.uk>
 160  *      - Add patch 681/1 and clean up stork definitions.
 161  */
 162
 163 #include <linux/module.h>
 164 #include <linux/kernel.h>
 165 #include <linux/sched.h>
 166 #include <linux/errno.h>
 167 #include <linux/string.h>
 168 #include <linux/interrupt.h>
 169 #include <linux/slab.h>
 170 #include <linux/mm.h>
 171 #include <linux/fb.h>
 172 #include <linux/delay.h>
 173 #include <linux/init.h>
 174 #include <linux/ioport.h>
 175 #include <linux/cpufreq.h>
 176 #include <linux/platform_device.h>
 177 #include <linux/dma-mapping.h>
 178 #include <linux/mutex.h>
 179 #include <linux/io.h>
 180
 181 #include <video/sa1100fb.h>
 182
 183 #include <mach/hardware.h>
 184 #include <asm/mach-types.h>
 185 #include <mach/shannon.h>
 186
 187 /*
 188  * Complain if VAR is out of range.
 189  */
 190 #define DEBUG_VAR 1
 191
 192 #include "sa1100fb.h"
 193
 194 static const struct sa1100fb_rgb rgb_4 = {
 195         .red    = { .offset = 0,  .length = 4, },
 196         .green  = { .offset = 0,  .length = 4, },
 197         .blue   = { .offset = 0,  .length = 4, },
 198         .transp = { .offset = 0,  .length = 0, },
 199 };
 200
 201 static const struct sa1100fb_rgb rgb_8 = {
 202         .red    = { .offset = 0,  .length = 8, },
 203         .green  = { .offset = 0,  .length = 8, },
 204         .blue   = { .offset = 0,  .length = 8, },
 205         .transp = { .offset = 0,  .length = 0, },
 206 };
 207
 208 static const struct sa1100fb_rgb def_rgb_16 = {
 209         .red    = { .offset = 11, .length = 5, },
 210         .green  = { .offset = 5,  .length = 6, },
 211         .blue   = { .offset = 0,  .length = 5, },
 212         .transp = { .offset = 0,  .length = 0, },
 213 };
 214
 215
 216
 217 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
 218 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);
 219
 220 static inline void sa1100fb_schedule_work(struct sa1100fb_info *fbi, u_int state)
 221 {
 222         unsigned long flags;
 223
 224         local_irq_save(flags);
 225         /*
 226          * We need to handle two requests being made at the same time.
 227          * There are two important cases:
 228          *  1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
 229          *     We must perform the unblanking, which will do our REENABLE for us.
 230          *  2. When we are blanking, but immediately unblank before we have
 231          *     blanked.  We do the "REENABLE" thing here as well, just to be sure.
 232          */
 233         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
 234                 state = (u_int) -1;
 235         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
 236                 state = C_REENABLE;
 237
 238         if (state != (u_int)-1) {
 239                 fbi->task_state = state;
 240                 schedule_work(&fbi->task);
 241         }
 242         local_irq_restore(flags);
 243 }
 244
 245 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 246 {
 247         chan &= 0xffff;
 248         chan >>= 16 - bf->length;
 249         return chan << bf->offset;
 250 }
 251
 252 /*
 253  * Convert bits-per-pixel to a hardware palette PBS value.
 254  */
 255 static inline u_int palette_pbs(struct fb_var_screeninfo *var)
 256 {
 257         int ret = 0;
 258         switch (var->bits_per_pixel) {
 259         case 4:  ret = 0 << 12; break;
 260         case 8:  ret = 1 << 12; break;
 261         case 16: ret = 2 << 12; break;
 262         }
 263         return ret;
 264 }
 265
 266 static int
 267 sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
 268                        u_int trans, struct fb_info *info)
 269 {
 270         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 271         u_int val, ret = 1;
 272
 273         if (regno < fbi->palette_size) {
 274                 val = ((red >> 4) & 0xf00);
 275                 val |= ((green >> 8) & 0x0f0);
 276                 val |= ((blue >> 12) & 0x00f);
 277
 278                 if (regno == 0)
 279                         val |= palette_pbs(&fbi->fb.var);
 280
 281                 fbi->palette_cpu[regno] = val;
 282                 ret = 0;
 283         }
 284         return ret;
 285 }
 286
 287 static int
 288 sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 289                    u_int trans, struct fb_info *info)
 290 {
 291         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 292         unsigned int val;
 293         int ret = 1;
 294
 295         /*
 296          * If inverse mode was selected, invert all the colours
 297          * rather than the register number.  The register number
 298          * is what you poke into the framebuffer to produce the
 299          * colour you requested.
 300          */
 301         if (fbi->inf->cmap_inverse) {
 302                 red   = 0xffff - red;
 303                 green = 0xffff - green;
 304                 blue  = 0xffff - blue;
 305         }
 306
 307         /*
 308          * If greyscale is true, then we convert the RGB value
 309          * to greyscale no mater what visual we are using.
 310          */
 311         if (fbi->fb.var.grayscale)
 312                 red = green = blue = (19595 * red + 38470 * green +
 313                                         7471 * blue) >> 16;
 314
 315         switch (fbi->fb.fix.visual) {
 316         case FB_VISUAL_TRUECOLOR:
 317                 /*
 318                  * 12 or 16-bit True Colour.  We encode the RGB value
 319                  * according to the RGB bitfield information.
 320                  */
 321                 if (regno < 16) {
 322                         u32 *pal = fbi->fb.pseudo_palette;
 323
 324                         val  = chan_to_field(red, &fbi->fb.var.red);
 325                         val |= chan_to_field(green, &fbi->fb.var.green);
 326                         val |= chan_to_field(blue, &fbi->fb.var.blue);
 327
 328                         pal[regno] = val;
 329                         ret = 0;
 330                 }
 331                 break;
 332
 333         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 334         case FB_VISUAL_PSEUDOCOLOR:
 335                 ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
 336                 break;
 337         }
 338
 339         return ret;
 340 }
 341
 342 #ifdef CONFIG_CPU_FREQ
 343 /*
 344  *  sa1100fb_display_dma_period()
 345  *    Calculate the minimum period (in picoseconds) between two DMA
 346  *    requests for the LCD controller.  If we hit this, it means we're
 347  *    doing nothing but LCD DMA.
 348  */
 349 static inline unsigned int sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
 350 {
 351         /*
 352          * Period = pixclock * bits_per_byte * bytes_per_transfer
 353          *              / memory_bits_per_pixel;
 354          */
 355         return var->pixclock * 8 * 16 / var->bits_per_pixel;
 356 }
 357 #endif
 358
 359 /*
 360  *  sa1100fb_check_var():
 361  *    Round up in the following order: bits_per_pixel, xres,
 362  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 363  *    bitfields, horizontal timing, vertical timing.
 364  */
 365 static int
 366 sa1100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 367 {
 368         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 369         int rgbidx;
 370
 371         if (var->xres < MIN_XRES)
 372                 var->xres = MIN_XRES;
 373         if (var->yres < MIN_YRES)
 374                 var->yres = MIN_YRES;
 375         if (var->xres > fbi->inf->xres)
 376                 var->xres = fbi->inf->xres;
 377         if (var->yres > fbi->inf->yres)
 378                 var->yres = fbi->inf->yres;
 379         var->xres_virtual = max(var->xres_virtual, var->xres);
 380         var->yres_virtual = max(var->yres_virtual, var->yres);
 381
 382         dev_dbg(fbi->dev, "var->bits_per_pixel=%d\n", var->bits_per_pixel);
 383         switch (var->bits_per_pixel) {
 384         case 4:
 385                 rgbidx = RGB_4;
 386                 break;
 387         case 8:
 388                 rgbidx = RGB_8;
 389                 break;
 390         case 16:
 391                 rgbidx = RGB_16;
 392                 break;
 393         default:
 394                 return -EINVAL;
 395         }
 396
 397         /*
 398          * Copy the RGB parameters for this display
 399          * from the machine specific parameters.
 400          */
 401         var->red    = fbi->rgb[rgbidx]->red;
 402         var->green  = fbi->rgb[rgbidx]->green;
 403         var->blue   = fbi->rgb[rgbidx]->blue;
 404         var->transp = fbi->rgb[rgbidx]->transp;
 405
 406         dev_dbg(fbi->dev, "RGBT length = %d:%d:%d:%d\n",
 407                 var->red.length, var->green.length, var->blue.length,
 408                 var->transp.length);
 409
 410         dev_dbg(fbi->dev, "RGBT offset = %d:%d:%d:%d\n",
 411                 var->red.offset, var->green.offset, var->blue.offset,
 412                 var->transp.offset);
 413
 414 #ifdef CONFIG_CPU_FREQ
 415         dev_dbg(fbi->dev, "dma period = %d ps, clock = %d kHz\n",
 416                 sa1100fb_display_dma_period(var),
 417                 cpufreq_get(smp_processor_id()));
 418 #endif
 419
 420         return 0;
 421 }
 422
 423 static void sa1100fb_set_visual(struct sa1100fb_info *fbi, u32 visual)
 424 {
 425         if (fbi->inf->set_visual)
 426                 fbi->inf->set_visual(visual);
 427 }
 428
 429 /*
 430  * sa1100fb_set_par():
 431  *      Set the user defined part of the display for the specified console
 432  */
 433 static int sa1100fb_set_par(struct fb_info *info)
 434 {
 435         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 436         struct fb_var_screeninfo *var = &info->var;
 437         unsigned long palette_mem_size;
 438
 439         dev_dbg(fbi->dev, "set_par\n");
 440
 441         if (var->bits_per_pixel == 16)
 442                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 443         else if (!fbi->inf->cmap_static)
 444                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 445         else {
 446                 /*
 447                  * Some people have weird ideas about wanting static
 448                  * pseudocolor maps.  I suspect their user space
 449                  * applications are broken.
 450                  */
 451                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 452         }
 453
 454         fbi->fb.fix.line_length = var->xres_virtual *
 455                                   var->bits_per_pixel / 8;
 456         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 457
 458         palette_mem_size = fbi->palette_size * sizeof(u16);
 459
 460         dev_dbg(fbi->dev, "palette_mem_size = 0x%08lx\n", palette_mem_size);
 461
 462         fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
 463         fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
 464
 465         /*
 466          * Set (any) board control register to handle new color depth
 467          */
 468         sa1100fb_set_visual(fbi, fbi->fb.fix.visual);
 469         sa1100fb_activate_var(var, fbi);
 470
 471         return 0;
 472 }
 473
 474 #if 0
 475 static int
 476 sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
 477                   struct fb_info *info)
 478 {
 479         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 480
 481         /*
 482          * Make sure the user isn't doing something stupid.
 483          */
 484         if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->inf->cmap_static))
 485                 return -EINVAL;
 486
 487         return gen_set_cmap(cmap, kspc, con, info);
 488 }
 489 #endif
 490
 491 /*
 492  * Formal definition of the VESA spec:
 493  *  On
 494  *      This refers to the state of the display when it is in full operation
 495  *  Stand-By
 496  *      This defines an optional operating state of minimal power reduction with
 497  *      the shortest recovery time
 498  *  Suspend
 499  *      This refers to a level of power management in which substantial power
 500  *      reduction is achieved by the display.  The display can have a longer
 501  *      recovery time from this state than from the Stand-by state
 502  *  Off
 503  *      This indicates that the display is consuming the lowest level of power
 504  *      and is non-operational. Recovery from this state may optionally require
 505  *      the user to manually power on the monitor
 506  *
 507  *  Now, the fbdev driver adds an additional state, (blank), where they
 508  *  turn off the video (maybe by colormap tricks), but don't mess with the
 509  *  video itself: think of it semantically between on and Stand-By.
 510  *
 511  *  So here's what we should do in our fbdev blank routine:
 512  *
 513  *      VESA_NO_BLANKING (mode 0)       Video on,  front/back light on
 514  *      VESA_VSYNC_SUSPEND (mode 1)     Video on,  front/back light off
 515  *      VESA_HSYNC_SUSPEND (mode 2)     Video on,  front/back light off
 516  *      VESA_POWERDOWN (mode 3)         Video off, front/back light off
 517  *
 518  *  This will match the matrox implementation.
 519  */
 520 /*
 521  * sa1100fb_blank():
 522  *      Blank the display by setting all palette values to zero.  Note, the
 523  *      12 and 16 bpp modes don't really use the palette, so this will not
 524  *      blank the display in all modes.
 525  */
 526 static int sa1100fb_blank(int blank, struct fb_info *info)
 527 {
 528         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 529         int i;
 530
 531         dev_dbg(fbi->dev, "sa1100fb_blank: blank=%d\n", blank);
 532
 533         switch (blank) {
 534         case FB_BLANK_POWERDOWN:
 535         case FB_BLANK_VSYNC_SUSPEND:
 536         case FB_BLANK_HSYNC_SUSPEND:
 537         case FB_BLANK_NORMAL:
 538                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 539                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 540                         for (i = 0; i < fbi->palette_size; i++)
 541                                 sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
 542                 sa1100fb_schedule_work(fbi, C_DISABLE);
 543                 break;
 544
 545         case FB_BLANK_UNBLANK:
 546                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 547                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 548                         fb_set_cmap(&fbi->fb.cmap, info);
 549                 sa1100fb_schedule_work(fbi, C_ENABLE);
 550         }
 551         return 0;
 552 }
 553
 554 static int sa1100fb_mmap(struct fb_info *info,
 555                          struct vm_area_struct *vma)
 556 {
 557         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 558         unsigned long start, len, off = vma->vm_pgoff << PAGE_SHIFT;
 559
 560         if (off < info->fix.smem_len) {
 561                 vma->vm_pgoff += 1; /* skip over the palette */
 562                 return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
 563                                              fbi->map_dma, fbi->map_size);
 564         }
 565
 566         start = info->fix.mmio_start;
 567         len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
 568
 569         if ((vma->vm_end - vma->vm_start + off) > len)
 570                 return -EINVAL;
 571
 572         off += start & PAGE_MASK;
 573         vma->vm_pgoff = off >> PAGE_SHIFT;
 574         vma->vm_flags |= VM_IO;
 575         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 576         return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 577                                    vma->vm_end - vma->vm_start,
 578                                    vma->vm_page_prot);
 579 }
 580
 581 static struct fb_ops sa1100fb_ops = {
 582         .owner          = THIS_MODULE,
 583         .fb_check_var   = sa1100fb_check_var,
 584         .fb_set_par     = sa1100fb_set_par,
 585 //      .fb_set_cmap    = sa1100fb_set_cmap,
 586         .fb_setcolreg   = sa1100fb_setcolreg,
 587         .fb_fillrect    = cfb_fillrect,
 588         .fb_copyarea    = cfb_copyarea,
 589         .fb_imageblit   = cfb_imageblit,
 590         .fb_blank       = sa1100fb_blank,
 591         .fb_mmap        = sa1100fb_mmap,
 592 };
 593
 594 /*
 595  * Calculate the PCD value from the clock rate (in picoseconds).
 596  * We take account of the PPCR clock setting.
 597  */
 598 static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock)
 599 {
 600         unsigned int pcd = cpuclock / 100;
 601
 602         pcd *= pixclock;
 603         pcd /= 10000000;
 604
 605         return pcd + 1; /* make up for integer math truncations */
 606 }
 607
 608 /*
 609  * sa1100fb_activate_var():
 610  *      Configures LCD Controller based on entries in var parameter.  Settings are
 611  *      only written to the controller if changes were made.
 612  */
 613 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
 614 {
 615         struct sa1100fb_lcd_reg new_regs;
 616         u_int half_screen_size, yres, pcd;
 617         u_long flags;
 618
 619         dev_dbg(fbi->dev, "Configuring SA1100 LCD\n");
 620
 621         dev_dbg(fbi->dev, "var: xres=%d hslen=%d lm=%d rm=%d\n",
 622                 var->xres, var->hsync_len,
 623                 var->left_margin, var->right_margin);
 624         dev_dbg(fbi->dev, "var: yres=%d vslen=%d um=%d bm=%d\n",
 625                 var->yres, var->vsync_len,
 626                 var->upper_margin, var->lower_margin);
 627
 628 #if DEBUG_VAR
 629         if (var->xres < 16        || var->xres > 1024)
 630                 dev_err(fbi->dev, "%s: invalid xres %d\n",
 631                         fbi->fb.fix.id, var->xres);
 632         if (var->hsync_len < 1    || var->hsync_len > 64)
 633                 dev_err(fbi->dev, "%s: invalid hsync_len %d\n",
 634                         fbi->fb.fix.id, var->hsync_len);
 635         if (var->left_margin < 1  || var->left_margin > 255)
 636                 dev_err(fbi->dev, "%s: invalid left_margin %d\n",
 637                         fbi->fb.fix.id, var->left_margin);
 638         if (var->right_margin < 1 || var->right_margin > 255)
 639                 dev_err(fbi->dev, "%s: invalid right_margin %d\n",
 640                         fbi->fb.fix.id, var->right_margin);
 641         if (var->yres < 1         || var->yres > 1024)
 642                 dev_err(fbi->dev, "%s: invalid yres %d\n",
 643                         fbi->fb.fix.id, var->yres);
 644         if (var->vsync_len < 1    || var->vsync_len > 64)
 645                 dev_err(fbi->dev, "%s: invalid vsync_len %d\n",
 646                         fbi->fb.fix.id, var->vsync_len);
 647         if (var->upper_margin < 0 || var->upper_margin > 255)
 648                 dev_err(fbi->dev, "%s: invalid upper_margin %d\n",
 649                         fbi->fb.fix.id, var->upper_margin);
 650         if (var->lower_margin < 0 || var->lower_margin > 255)
 651                 dev_err(fbi->dev, "%s: invalid lower_margin %d\n",
 652                         fbi->fb.fix.id, var->lower_margin);
 653 #endif
 654
 655         new_regs.lccr0 = fbi->inf->lccr0 |
 656                 LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
 657                 LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
 658
 659         new_regs.lccr1 =
 660                 LCCR1_DisWdth(var->xres) +
 661                 LCCR1_HorSnchWdth(var->hsync_len) +
 662                 LCCR1_BegLnDel(var->left_margin) +
 663                 LCCR1_EndLnDel(var->right_margin);
 664
 665         /*
 666          * If we have a dual scan LCD, then we need to halve
 667          * the YRES parameter.
 668          */
 669         yres = var->yres;
 670         if (fbi->inf->lccr0 & LCCR0_Dual)
 671                 yres /= 2;
 672
 673         new_regs.lccr2 =
 674                 LCCR2_DisHght(yres) +
 675                 LCCR2_VrtSnchWdth(var->vsync_len) +
 676                 LCCR2_BegFrmDel(var->upper_margin) +
 677                 LCCR2_EndFrmDel(var->lower_margin);
 678
 679         pcd = get_pcd(var->pixclock, cpufreq_get(0));
 680         new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->inf->lccr3 |
 681                 (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
 682                 (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
 683
 684         dev_dbg(fbi->dev, "nlccr0 = 0x%08lx\n", new_regs.lccr0);
 685         dev_dbg(fbi->dev, "nlccr1 = 0x%08lx\n", new_regs.lccr1);
 686         dev_dbg(fbi->dev, "nlccr2 = 0x%08lx\n", new_regs.lccr2);
 687         dev_dbg(fbi->dev, "nlccr3 = 0x%08lx\n", new_regs.lccr3);
 688
 689         half_screen_size = var->bits_per_pixel;
 690         half_screen_size = half_screen_size * var->xres * var->yres / 16;
 691
 692         /* Update shadow copy atomically */
 693         local_irq_save(flags);
 694         fbi->dbar1 = fbi->palette_dma;
 695         fbi->dbar2 = fbi->screen_dma + half_screen_size;
 696
 697         fbi->reg_lccr0 = new_regs.lccr0;
 698         fbi->reg_lccr1 = new_regs.lccr1;
 699         fbi->reg_lccr2 = new_regs.lccr2;
 700         fbi->reg_lccr3 = new_regs.lccr3;
 701         local_irq_restore(flags);
 702
 703         /*
 704          * Only update the registers if the controller is enabled
 705          * and something has changed.
 706          */
 707         if ((LCCR0 != fbi->reg_lccr0)       || (LCCR1 != fbi->reg_lccr1) ||
 708             (LCCR2 != fbi->reg_lccr2)       || (LCCR3 != fbi->reg_lccr3) ||
 709             (DBAR1 != fbi->dbar1) || (DBAR2 != fbi->dbar2))
 710                 sa1100fb_schedule_work(fbi, C_REENABLE);
 711
 712         return 0;
 713 }
 714
 715 /*
 716  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
 717  * Do not call them directly; set_ctrlr_state does the correct serialisation
 718  * to ensure that things happen in the right way 100% of time time.
 719  *      -- rmk
 720  */
 721 static inline void __sa1100fb_backlight_power(struct sa1100fb_info *fbi, int on)
 722 {
 723         dev_dbg(fbi->dev, "backlight o%s\n", on ? "n" : "ff");
 724
 725         if (fbi->inf->backlight_power)
 726                 fbi->inf->backlight_power(on);
 727 }
 728
 729 static inline void __sa1100fb_lcd_power(struct sa1100fb_info *fbi, int on)
 730 {
 731         dev_dbg(fbi->dev, "LCD power o%s\n", on ? "n" : "ff");
 732
 733         if (fbi->inf->lcd_power)
 734                 fbi->inf->lcd_power(on);
 735 }
 736
 737 static void sa1100fb_setup_gpio(struct sa1100fb_info *fbi)
 738 {
 739         u_int mask = 0;
 740
 741         /*
 742          * Enable GPIO<9:2> for LCD use if:
 743          *  1. Active display, or
 744          *  2. Color Dual Passive display
 745          *
 746          * see table 11.8 on page 11-27 in the SA1100 manual
 747          *   -- Erik.
 748          *
 749          * SA1110 spec update nr. 25 says we can and should
 750          * clear LDD15 to 12 for 4 or 8bpp modes with active
 751          * panels.
 752          */
 753         if ((fbi->reg_lccr0 & LCCR0_CMS) == LCCR0_Color &&
 754             (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) != 0) {
 755                 mask = GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9  | GPIO_LDD8;
 756
 757                 if (fbi->fb.var.bits_per_pixel > 8 ||
 758                     (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) == LCCR0_Dual)
 759                         mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12;
 760
 761         }
 762
 763         if (mask) {
 764                 GPDR |= mask;
 765                 GAFR |= mask;
 766         }
 767 }
 768
 769 static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
 770 {
 771         dev_dbg(fbi->dev, "Enabling LCD controller\n");
 772
 773         /*
 774          * Make sure the mode bits are present in the first palette entry
 775          */
 776         fbi->palette_cpu[0] &= 0xcfff;
 777         fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
 778
 779         /* Sequence from 11.7.10 */
 780         LCCR3 = fbi->reg_lccr3;
 781         LCCR2 = fbi->reg_lccr2;
 782         LCCR1 = fbi->reg_lccr1;
 783         LCCR0 = fbi->reg_lccr0 & ~LCCR0_LEN;
 784         DBAR1 = fbi->dbar1;
 785         DBAR2 = fbi->dbar2;
 786         LCCR0 |= LCCR0_LEN;
 787
 788         if (machine_is_shannon()) {
 789                 GPDR |= SHANNON_GPIO_DISP_EN;
 790                 GPSR |= SHANNON_GPIO_DISP_EN;
 791         }
 792
 793         dev_dbg(fbi->dev, "DBAR1 = 0x%08lx\n", DBAR1);
 794         dev_dbg(fbi->dev, "DBAR2 = 0x%08lx\n", DBAR2);
 795         dev_dbg(fbi->dev, "LCCR0 = 0x%08lx\n", LCCR0);
 796         dev_dbg(fbi->dev, "LCCR1 = 0x%08lx\n", LCCR1);
 797         dev_dbg(fbi->dev, "LCCR2 = 0x%08lx\n", LCCR2);
 798         dev_dbg(fbi->dev, "LCCR3 = 0x%08lx\n", LCCR3);
 799 }
 800
 801 static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
 802 {
 803         DECLARE_WAITQUEUE(wait, current);
 804
 805         dev_dbg(fbi->dev, "Disabling LCD controller\n");
 806
 807         if (machine_is_shannon()) {
 808                 GPCR |= SHANNON_GPIO_DISP_EN;
 809         }
 810
 811         set_current_state(TASK_UNINTERRUPTIBLE);
 812         add_wait_queue(&fbi->ctrlr_wait, &wait);
 813
 814         LCSR = 0xffffffff;      /* Clear LCD Status Register */
 815         LCCR0 &= ~LCCR0_LDM;    /* Enable LCD Disable Done Interrupt */
 816         LCCR0 &= ~LCCR0_LEN;    /* Disable LCD Controller */
 817
 818         schedule_timeout(20 * HZ / 1000);
 819         remove_wait_queue(&fbi->ctrlr_wait, &wait);
 820 }
 821
 822 /*
 823  *  sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
 824  */
 825 static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
 826 {
 827         struct sa1100fb_info *fbi = dev_id;
 828         unsigned int lcsr = LCSR;
 829
 830         if (lcsr & LCSR_LDD) {
 831                 LCCR0 |= LCCR0_LDM;
 832                 wake_up(&fbi->ctrlr_wait);
 833         }
 834
 835         LCSR = lcsr;
 836         return IRQ_HANDLED;
 837 }
 838
 839 /*
 840  * This function must be called from task context only, since it will
 841  * sleep when disabling the LCD controller, or if we get two contending
 842  * processes trying to alter state.
 843  */
 844 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 845 {
 846         u_int old_state;
 847
 848         mutex_lock(&fbi->ctrlr_lock);
 849
 850         old_state = fbi->state;
 851
 852         /*
 853          * Hack around fbcon initialisation.
 854          */
 855         if (old_state == C_STARTUP && state == C_REENABLE)
 856                 state = C_ENABLE;
 857
 858         switch (state) {
 859         case C_DISABLE_CLKCHANGE:
 860                 /*
 861                  * Disable controller for clock change.  If the
 862                  * controller is already disabled, then do nothing.
 863                  */
 864                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
 865                         fbi->state = state;
 866                         sa1100fb_disable_controller(fbi);
 867                 }
 868                 break;
 869
 870         case C_DISABLE_PM:
 871         case C_DISABLE:
 872                 /*
 873                  * Disable controller
 874                  */
 875                 if (old_state != C_DISABLE) {
 876                         fbi->state = state;
 877
 878                         __sa1100fb_backlight_power(fbi, 0);
 879                         if (old_state != C_DISABLE_CLKCHANGE)
 880                                 sa1100fb_disable_controller(fbi);
 881                         __sa1100fb_lcd_power(fbi, 0);
 882                 }
 883                 break;
 884
 885         case C_ENABLE_CLKCHANGE:
 886                 /*
 887                  * Enable the controller after clock change.  Only
 888                  * do this if we were disabled for the clock change.
 889                  */
 890                 if (old_state == C_DISABLE_CLKCHANGE) {
 891                         fbi->state = C_ENABLE;
 892                         sa1100fb_enable_controller(fbi);
 893                 }
 894                 break;
 895
 896         case C_REENABLE:
 897                 /*
 898                  * Re-enable the controller only if it was already
 899                  * enabled.  This is so we reprogram the control
 900                  * registers.
 901                  */
 902                 if (old_state == C_ENABLE) {
 903                         sa1100fb_disable_controller(fbi);
 904                         sa1100fb_setup_gpio(fbi);
 905                         sa1100fb_enable_controller(fbi);
 906                 }
 907                 break;
 908
 909         case C_ENABLE_PM:
 910                 /*
 911                  * Re-enable the controller after PM.  This is not
 912                  * perfect - think about the case where we were doing
 913                  * a clock change, and we suspended half-way through.
 914                  */
 915                 if (old_state != C_DISABLE_PM)
 916                         break;
 917                 /* fall through */
 918
 919         case C_ENABLE:
 920                 /*
 921                  * Power up the LCD screen, enable controller, and
 922                  * turn on the backlight.
 923                  */
 924                 if (old_state != C_ENABLE) {
 925                         fbi->state = C_ENABLE;
 926                         sa1100fb_setup_gpio(fbi);
 927                         __sa1100fb_lcd_power(fbi, 1);
 928                         sa1100fb_enable_controller(fbi);
 929                         __sa1100fb_backlight_power(fbi, 1);
 930                 }
 931                 break;
 932         }
 933         mutex_unlock(&fbi->ctrlr_lock);
 934 }
 935
 936 /*
 937  * Our LCD controller task (which is called when we blank or unblank)
 938  * via keventd.
 939  */
 940 static void sa1100fb_task(struct work_struct *w)
 941 {
 942         struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
 943         u_int state = xchg(&fbi->task_state, -1);
 944
 945         set_ctrlr_state(fbi, state);
 946 }
 947
 948 #ifdef CONFIG_CPU_FREQ
 949 /*
 950  * Calculate the minimum DMA period over all displays that we own.
 951  * This, together with the SDRAM bandwidth defines the slowest CPU
 952  * frequency that can be selected.
 953  */
 954 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 955 {
 956 #if 0
 957         unsigned int min_period = (unsigned int)-1;
 958         int i;
 959
 960         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 961                 struct display *disp = &fb_display[i];
 962                 unsigned int period;
 963
 964                 /*
 965                  * Do we own this display?
 966                  */
 967                 if (disp->fb_info != &fbi->fb)
 968                         continue;
 969
 970                 /*
 971                  * Ok, calculate its DMA period
 972                  */
 973                 period = sa1100fb_display_dma_period(&disp->var);
 974                 if (period < min_period)
 975                         min_period = period;
 976         }
 977
 978         return min_period;
 979 #else
 980         /*
 981          * FIXME: we need to verify _all_ consoles.
 982          */
 983         return sa1100fb_display_dma_period(&fbi->fb.var);
 984 #endif
 985 }
 986
 987 /*
 988  * CPU clock speed change handler.  We need to adjust the LCD timing
 989  * parameters when the CPU clock is adjusted by the power management
 990  * subsystem.
 991  */
 992 static int
 993 sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val,
 994                          void *data)
 995 {
 996         struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
 997         struct cpufreq_freqs *f = data;
 998         u_int pcd;
 999
1000         switch (val) {
1001         case CPUFREQ_PRECHANGE:
1002                 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1003                 break;
1004
1005         case CPUFREQ_POSTCHANGE:
1006                 pcd = get_pcd(fbi->fb.var.pixclock, f->new);
1007                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
1008                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1009                 break;
1010         }
1011         return 0;
1012 }
1013
1014 static int
1015 sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
1016                      void *data)
1017 {
1018         struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
1019         struct cpufreq_policy *policy = data;
1020
1021         switch (val) {
1022         case CPUFREQ_ADJUST:
1023         case CPUFREQ_INCOMPATIBLE:
1024                 dev_dbg(fbi->dev, "min dma period: %d ps, "
1025                         "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
1026                         policy->max);
1027                 /* todo: fill in min/max values */
1028                 break;
1029         case CPUFREQ_NOTIFY:
1030                 do {} while(0);
1031                 /* todo: panic if min/max values aren't fulfilled
1032                  * [can't really happen unless there's a bug in the
1033                  * CPU policy verififcation process *
1034                  */
1035                 break;
1036         }
1037         return 0;
1038 }
1039 #endif
1040
1041 #ifdef CONFIG_PM
1042 /*
1043  * Power management hooks.  Note that we won't be called from IRQ context,
1044  * unlike the blank functions above, so we may sleep.
1045  */
1046 static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
1047 {
1048         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1049
1050         set_ctrlr_state(fbi, C_DISABLE_PM);
1051         return 0;
1052 }
1053
1054 static int sa1100fb_resume(struct platform_device *dev)
1055 {
1056         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1057
1058         set_ctrlr_state(fbi, C_ENABLE_PM);
1059         return 0;
1060 }
1061 #else
1062 #define sa1100fb_suspend        NULL
1063 #define sa1100fb_resume         NULL
1064 #endif
1065
1066 /*
1067  * sa1100fb_map_video_memory():
1068  *      Allocates the DRAM memory for the frame buffer.  This buffer is
1069  *      remapped into a non-cached, non-buffered, memory region to
1070  *      allow palette and pixel writes to occur without flushing the
1071  *      cache.  Once this area is remapped, all virtual memory
1072  *      access to the video memory should occur at the new region.
1073  */
1074 static int __devinit sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
1075 {
1076         /*
1077          * We reserve one page for the palette, plus the size
1078          * of the framebuffer.
1079          */
1080         fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
1081         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
1082                                               &fbi->map_dma, GFP_KERNEL);
1083
1084         if (fbi->map_cpu) {
1085                 fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
1086                 fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
1087                 /*
1088                  * FIXME: this is actually the wrong thing to place in
1089                  * smem_start.  But fbdev suffers from the problem that
1090                  * it needs an API which doesn't exist (in this case,
1091                  * dma_writecombine_mmap)
1092                  */
1093                 fbi->fb.fix.smem_start = fbi->screen_dma;
1094         }
1095
1096         return fbi->map_cpu ? 0 : -ENOMEM;
1097 }
1098
1099 /* Fake monspecs to fill in fbinfo structure */
1100 static struct fb_monspecs monspecs __devinitdata = {
1101         .hfmin  = 30000,
1102         .hfmax  = 70000,
1103         .vfmin  = 50,
1104         .vfmax  = 65,
1105 };
1106
1107
1108 static struct sa1100fb_info * __devinit sa1100fb_init_fbinfo(struct device *dev)
1109 {
1110         struct sa1100fb_mach_info *inf = dev->platform_data;
1111         struct sa1100fb_info *fbi;
1112         unsigned i;
1113
1114         fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
1115                       GFP_KERNEL);
1116         if (!fbi)
1117                 return NULL;
1118
1119         memset(fbi, 0, sizeof(struct sa1100fb_info));
1120         fbi->dev = dev;
1121
1122         strcpy(fbi->fb.fix.id, SA1100_NAME);
1123
1124         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1125         fbi->fb.fix.type_aux    = 0;
1126         fbi->fb.fix.xpanstep    = 0;
1127         fbi->fb.fix.ypanstep    = 0;
1128         fbi->fb.fix.ywrapstep   = 0;
1129         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1130
1131         fbi->fb.var.nonstd      = 0;
1132         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1133         fbi->fb.var.height      = -1;
1134         fbi->fb.var.width       = -1;
1135         fbi->fb.var.accel_flags = 0;
1136         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1137
1138         fbi->fb.fbops           = &sa1100fb_ops;
1139         fbi->fb.flags           = FBINFO_DEFAULT;
1140         fbi->fb.monspecs        = monspecs;
1141         fbi->fb.pseudo_palette  = (fbi + 1);
1142
1143         fbi->rgb[RGB_4]         = &rgb_4;
1144         fbi->rgb[RGB_8]         = &rgb_8;
1145         fbi->rgb[RGB_16]        = &def_rgb_16;
1146
1147         /*
1148          * People just don't seem to get this.  We don't support
1149          * anything but correct entries now, so panic if someone
1150          * does something stupid.
1151          */
1152         if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
1153             inf->pixclock == 0)
1154                 panic("sa1100fb error: invalid LCCR3 fields set or zero "
1155                         "pixclock.");
1156
1157         fbi->fb.var.xres                = inf->xres;
1158         fbi->fb.var.xres_virtual        = inf->xres;
1159         fbi->fb.var.yres                = inf->yres;
1160         fbi->fb.var.yres_virtual        = inf->yres;
1161         fbi->fb.var.bits_per_pixel      = inf->bpp;
1162         fbi->fb.var.pixclock            = inf->pixclock;
1163         fbi->fb.var.hsync_len           = inf->hsync_len;
1164         fbi->fb.var.left_margin         = inf->left_margin;
1165         fbi->fb.var.right_margin        = inf->right_margin;
1166         fbi->fb.var.vsync_len           = inf->vsync_len;
1167         fbi->fb.var.upper_margin        = inf->upper_margin;
1168         fbi->fb.var.lower_margin        = inf->lower_margin;
1169         fbi->fb.var.sync                = inf->sync;
1170         fbi->fb.var.grayscale           = inf->cmap_greyscale;
1171         fbi->state                      = C_STARTUP;
1172         fbi->task_state                 = (u_char)-1;
1173         fbi->fb.fix.smem_len            = inf->xres * inf->yres *
1174                                           inf->bpp / 8;
1175         fbi->inf                        = inf;
1176
1177         /* Copy the RGB bitfield overrides */
1178         for (i = 0; i < NR_RGB; i++)
1179                 if (inf->rgb[i])
1180                         fbi->rgb[i] = inf->rgb[i];
1181
1182         init_waitqueue_head(&fbi->ctrlr_wait);
1183         INIT_WORK(&fbi->task, sa1100fb_task);
1184         mutex_init(&fbi->ctrlr_lock);
1185
1186         return fbi;
1187 }
1188
1189 static int __devinit sa1100fb_probe(struct platform_device *pdev)
1190 {
1191         struct sa1100fb_info *fbi;
1192         int ret, irq;
1193
1194         if (!pdev->dev.platform_data) {
1195                 dev_err(&pdev->dev, "no platform LCD data\n");
1196                 return -EINVAL;
1197         }
1198
1199         irq = platform_get_irq(pdev, 0);
1200         if (irq < 0)
1201                 return -EINVAL;
1202
1203         if (!request_mem_region(0xb0100000, 0x10000, "LCD"))
1204                 return -EBUSY;
1205
1206         fbi = sa1100fb_init_fbinfo(&pdev->dev);
1207         ret = -ENOMEM;
1208         if (!fbi)
1209                 goto failed;
1210
1211         /* Initialize video memory */
1212         ret = sa1100fb_map_video_memory(fbi);
1213         if (ret)
1214                 goto failed;
1215
1216         ret = request_irq(irq, sa1100fb_handle_irq, 0, "LCD", fbi);
1217         if (ret) {
1218                 dev_err(&pdev->dev, "request_irq failed: %d\n", ret);
1219                 goto failed;
1220         }
1221
1222         /*
1223          * This makes sure that our colour bitfield
1224          * descriptors are correctly initialised.
1225          */
1226         sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
1227
1228         platform_set_drvdata(pdev, fbi);
1229
1230         ret = register_framebuffer(&fbi->fb);
1231         if (ret < 0)
1232                 goto err_free_irq;
1233
1234 #ifdef CONFIG_CPU_FREQ
1235         fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
1236         fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
1237         cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
1238         cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
1239 #endif
1240
1241         /* This driver cannot be unloaded at the moment */
1242         return 0;
1243
1244  err_free_irq:
1245         free_irq(irq, fbi);
1246  failed:
1247         platform_set_drvdata(pdev, NULL);
1248         kfree(fbi);
1249         release_mem_region(0xb0100000, 0x10000);
1250         return ret;
1251 }
1252
1253 static struct platform_driver sa1100fb_driver = {
1254         .probe          = sa1100fb_probe,
1255         .suspend        = sa1100fb_suspend,
1256         .resume         = sa1100fb_resume,
1257         .driver         = {
1258                 .name   = "sa11x0-fb",
1259                 .owner  = THIS_MODULE,
1260         },
1261 };
1262
1263 int __init sa1100fb_init(void)
1264 {
1265         if (fb_get_options("sa1100fb", NULL))
1266                 return -ENODEV;
1267
1268         return platform_driver_register(&sa1100fb_driver);
1269 }
1270
1271 int __init sa1100fb_setup(char *options)
1272 {
1273 #if 0
1274         char *this_opt;
1275
1276         if (!options || !*options)
1277                 return 0;
1278
1279         while ((this_opt = strsep(&options, ",")) != NULL) {
1280
1281                 if (!strncmp(this_opt, "bpp:", 4))
1282                         current_par.max_bpp =
1283                             simple_strtoul(this_opt + 4, NULL, 0);
1284
1285                 if (!strncmp(this_opt, "lccr0:", 6))
1286                         lcd_shadow.lccr0 =
1287                             simple_strtoul(this_opt + 6, NULL, 0);
1288                 if (!strncmp(this_opt, "lccr1:", 6)) {
1289                         lcd_shadow.lccr1 =
1290                             simple_strtoul(this_opt + 6, NULL, 0);
1291                         current_par.max_xres =
1292                             (lcd_shadow.lccr1 & 0x3ff) + 16;
1293                 }
1294                 if (!strncmp(this_opt, "lccr2:", 6)) {
1295                         lcd_shadow.lccr2 =
1296                             simple_strtoul(this_opt + 6, NULL, 0);
1297                         current_par.max_yres =
1298                             (lcd_shadow.
1299                              lccr0 & LCCR0_SDS) ? ((lcd_shadow.
1300                                                     lccr2 & 0x3ff) +
1301                                                    1) *
1302                             2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
1303                 }
1304                 if (!strncmp(this_opt, "lccr3:", 6))
1305                         lcd_shadow.lccr3 =
1306                             simple_strtoul(this_opt + 6, NULL, 0);
1307         }
1308 #endif
1309         return 0;
1310 }
1311
1312 module_init(sa1100fb_init);
1313 MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
1314 MODULE_LICENSE("GPL");