drivers/video/fbdev/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/gpio.h>
 177 #include <linux/platform_device.h>
 178 #include <linux/dma-mapping.h>
 179 #include <linux/mutex.h>
 180 #include <linux/io.h>
 181
 182 #include <video/sa1100fb.h>
 183
 184 #include <mach/hardware.h>
 185 #include <asm/mach-types.h>
 186 #include <mach/shannon.h>
 187
 188 /*
 189  * Complain if VAR is out of range.
 190  */
 191 #define DEBUG_VAR 1
 192
 193 #include "sa1100fb.h"
 194
 195 static const struct sa1100fb_rgb rgb_4 = {
 196         .red    = { .offset = 0,  .length = 4, },
 197         .green  = { .offset = 0,  .length = 4, },
 198         .blue   = { .offset = 0,  .length = 4, },
 199         .transp = { .offset = 0,  .length = 0, },
 200 };
 201
 202 static const struct sa1100fb_rgb rgb_8 = {
 203         .red    = { .offset = 0,  .length = 8, },
 204         .green  = { .offset = 0,  .length = 8, },
 205         .blue   = { .offset = 0,  .length = 8, },
 206         .transp = { .offset = 0,  .length = 0, },
 207 };
 208
 209 static const struct sa1100fb_rgb def_rgb_16 = {
 210         .red    = { .offset = 11, .length = 5, },
 211         .green  = { .offset = 5,  .length = 6, },
 212         .blue   = { .offset = 0,  .length = 5, },
 213         .transp = { .offset = 0,  .length = 0, },
 214 };
 215
 216
 217
 218 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
 219 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);
 220
 221 static inline void sa1100fb_schedule_work(struct sa1100fb_info *fbi, u_int state)
 222 {
 223         unsigned long flags;
 224
 225         local_irq_save(flags);
 226         /*
 227          * We need to handle two requests being made at the same time.
 228          * There are two important cases:
 229          *  1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
 230          *     We must perform the unblanking, which will do our REENABLE for us.
 231          *  2. When we are blanking, but immediately unblank before we have
 232          *     blanked.  We do the "REENABLE" thing here as well, just to be sure.
 233          */
 234         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
 235                 state = (u_int) -1;
 236         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
 237                 state = C_REENABLE;
 238
 239         if (state != (u_int)-1) {
 240                 fbi->task_state = state;
 241                 schedule_work(&fbi->task);
 242         }
 243         local_irq_restore(flags);
 244 }
 245
 246 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 247 {
 248         chan &= 0xffff;
 249         chan >>= 16 - bf->length;
 250         return chan << bf->offset;
 251 }
 252
 253 /*
 254  * Convert bits-per-pixel to a hardware palette PBS value.
 255  */
 256 static inline u_int palette_pbs(struct fb_var_screeninfo *var)
 257 {
 258         int ret = 0;
 259         switch (var->bits_per_pixel) {
 260         case 4:  ret = 0 << 12; break;
 261         case 8:  ret = 1 << 12; break;
 262         case 16: ret = 2 << 12; break;
 263         }
 264         return ret;
 265 }
 266
 267 static int
 268 sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
 269                        u_int trans, struct fb_info *info)
 270 {
 271         struct sa1100fb_info *fbi =
 272                 container_of(info, struct sa1100fb_info, fb);
 273         u_int val, ret = 1;
 274
 275         if (regno < fbi->palette_size) {
 276                 val = ((red >> 4) & 0xf00);
 277                 val |= ((green >> 8) & 0x0f0);
 278                 val |= ((blue >> 12) & 0x00f);
 279
 280                 if (regno == 0)
 281                         val |= palette_pbs(&fbi->fb.var);
 282
 283                 fbi->palette_cpu[regno] = val;
 284                 ret = 0;
 285         }
 286         return ret;
 287 }
 288
 289 static int
 290 sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 291                    u_int trans, struct fb_info *info)
 292 {
 293         struct sa1100fb_info *fbi =
 294                 container_of(info, struct sa1100fb_info, fb);
 295         unsigned int val;
 296         int ret = 1;
 297
 298         /*
 299          * If inverse mode was selected, invert all the colours
 300          * rather than the register number.  The register number
 301          * is what you poke into the framebuffer to produce the
 302          * colour you requested.
 303          */
 304         if (fbi->inf->cmap_inverse) {
 305                 red   = 0xffff - red;
 306                 green = 0xffff - green;
 307                 blue  = 0xffff - blue;
 308         }
 309
 310         /*
 311          * If greyscale is true, then we convert the RGB value
 312          * to greyscale no mater what visual we are using.
 313          */
 314         if (fbi->fb.var.grayscale)
 315                 red = green = blue = (19595 * red + 38470 * green +
 316                                         7471 * blue) >> 16;
 317
 318         switch (fbi->fb.fix.visual) {
 319         case FB_VISUAL_TRUECOLOR:
 320                 /*
 321                  * 12 or 16-bit True Colour.  We encode the RGB value
 322                  * according to the RGB bitfield information.
 323                  */
 324                 if (regno < 16) {
 325                         u32 *pal = fbi->fb.pseudo_palette;
 326
 327                         val  = chan_to_field(red, &fbi->fb.var.red);
 328                         val |= chan_to_field(green, &fbi->fb.var.green);
 329                         val |= chan_to_field(blue, &fbi->fb.var.blue);
 330
 331                         pal[regno] = val;
 332                         ret = 0;
 333                 }
 334                 break;
 335
 336         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 337         case FB_VISUAL_PSEUDOCOLOR:
 338                 ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
 339                 break;
 340         }
 341
 342         return ret;
 343 }
 344
 345 #ifdef CONFIG_CPU_FREQ
 346 /*
 347  *  sa1100fb_display_dma_period()
 348  *    Calculate the minimum period (in picoseconds) between two DMA
 349  *    requests for the LCD controller.  If we hit this, it means we're
 350  *    doing nothing but LCD DMA.
 351  */
 352 static inline unsigned int sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
 353 {
 354         /*
 355          * Period = pixclock * bits_per_byte * bytes_per_transfer
 356          *              / memory_bits_per_pixel;
 357          */
 358         return var->pixclock * 8 * 16 / var->bits_per_pixel;
 359 }
 360 #endif
 361
 362 /*
 363  *  sa1100fb_check_var():
 364  *    Round up in the following order: bits_per_pixel, xres,
 365  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 366  *    bitfields, horizontal timing, vertical timing.
 367  */
 368 static int
 369 sa1100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 370 {
 371         struct sa1100fb_info *fbi =
 372                 container_of(info, struct sa1100fb_info, fb);
 373         int rgbidx;
 374
 375         if (var->xres < MIN_XRES)
 376                 var->xres = MIN_XRES;
 377         if (var->yres < MIN_YRES)
 378                 var->yres = MIN_YRES;
 379         if (var->xres > fbi->inf->xres)
 380                 var->xres = fbi->inf->xres;
 381         if (var->yres > fbi->inf->yres)
 382                 var->yres = fbi->inf->yres;
 383         var->xres_virtual = max(var->xres_virtual, var->xres);
 384         var->yres_virtual = max(var->yres_virtual, var->yres);
 385
 386         dev_dbg(fbi->dev, "var->bits_per_pixel=%d\n", var->bits_per_pixel);
 387         switch (var->bits_per_pixel) {
 388         case 4:
 389                 rgbidx = RGB_4;
 390                 break;
 391         case 8:
 392                 rgbidx = RGB_8;
 393                 break;
 394         case 16:
 395                 rgbidx = RGB_16;
 396                 break;
 397         default:
 398                 return -EINVAL;
 399         }
 400
 401         /*
 402          * Copy the RGB parameters for this display
 403          * from the machine specific parameters.
 404          */
 405         var->red    = fbi->rgb[rgbidx]->red;
 406         var->green  = fbi->rgb[rgbidx]->green;
 407         var->blue   = fbi->rgb[rgbidx]->blue;
 408         var->transp = fbi->rgb[rgbidx]->transp;
 409
 410         dev_dbg(fbi->dev, "RGBT length = %d:%d:%d:%d\n",
 411                 var->red.length, var->green.length, var->blue.length,
 412                 var->transp.length);
 413
 414         dev_dbg(fbi->dev, "RGBT offset = %d:%d:%d:%d\n",
 415                 var->red.offset, var->green.offset, var->blue.offset,
 416                 var->transp.offset);
 417
 418 #ifdef CONFIG_CPU_FREQ
 419         dev_dbg(fbi->dev, "dma period = %d ps, clock = %d kHz\n",
 420                 sa1100fb_display_dma_period(var),
 421                 cpufreq_get(smp_processor_id()));
 422 #endif
 423
 424         return 0;
 425 }
 426
 427 static void sa1100fb_set_visual(struct sa1100fb_info *fbi, u32 visual)
 428 {
 429         if (fbi->inf->set_visual)
 430                 fbi->inf->set_visual(visual);
 431 }
 432
 433 /*
 434  * sa1100fb_set_par():
 435  *      Set the user defined part of the display for the specified console
 436  */
 437 static int sa1100fb_set_par(struct fb_info *info)
 438 {
 439         struct sa1100fb_info *fbi =
 440                 container_of(info, struct sa1100fb_info, fb);
 441         struct fb_var_screeninfo *var = &info->var;
 442         unsigned long palette_mem_size;
 443
 444         dev_dbg(fbi->dev, "set_par\n");
 445
 446         if (var->bits_per_pixel == 16)
 447                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 448         else if (!fbi->inf->cmap_static)
 449                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 450         else {
 451                 /*
 452                  * Some people have weird ideas about wanting static
 453                  * pseudocolor maps.  I suspect their user space
 454                  * applications are broken.
 455                  */
 456                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 457         }
 458
 459         fbi->fb.fix.line_length = var->xres_virtual *
 460                                   var->bits_per_pixel / 8;
 461         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 462
 463         palette_mem_size = fbi->palette_size * sizeof(u16);
 464
 465         dev_dbg(fbi->dev, "palette_mem_size = 0x%08lx\n", palette_mem_size);
 466
 467         fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
 468         fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
 469
 470         /*
 471          * Set (any) board control register to handle new color depth
 472          */
 473         sa1100fb_set_visual(fbi, fbi->fb.fix.visual);
 474         sa1100fb_activate_var(var, fbi);
 475
 476         return 0;
 477 }
 478
 479 #if 0
 480 static int
 481 sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
 482                   struct fb_info *info)
 483 {
 484         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 485
 486         /*
 487          * Make sure the user isn't doing something stupid.
 488          */
 489         if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->inf->cmap_static))
 490                 return -EINVAL;
 491
 492         return gen_set_cmap(cmap, kspc, con, info);
 493 }
 494 #endif
 495
 496 /*
 497  * Formal definition of the VESA spec:
 498  *  On
 499  *      This refers to the state of the display when it is in full operation
 500  *  Stand-By
 501  *      This defines an optional operating state of minimal power reduction with
 502  *      the shortest recovery time
 503  *  Suspend
 504  *      This refers to a level of power management in which substantial power
 505  *      reduction is achieved by the display.  The display can have a longer
 506  *      recovery time from this state than from the Stand-by state
 507  *  Off
 508  *      This indicates that the display is consuming the lowest level of power
 509  *      and is non-operational. Recovery from this state may optionally require
 510  *      the user to manually power on the monitor
 511  *
 512  *  Now, the fbdev driver adds an additional state, (blank), where they
 513  *  turn off the video (maybe by colormap tricks), but don't mess with the
 514  *  video itself: think of it semantically between on and Stand-By.
 515  *
 516  *  So here's what we should do in our fbdev blank routine:
 517  *
 518  *      VESA_NO_BLANKING (mode 0)       Video on,  front/back light on
 519  *      VESA_VSYNC_SUSPEND (mode 1)     Video on,  front/back light off
 520  *      VESA_HSYNC_SUSPEND (mode 2)     Video on,  front/back light off
 521  *      VESA_POWERDOWN (mode 3)         Video off, front/back light off
 522  *
 523  *  This will match the matrox implementation.
 524  */
 525 /*
 526  * sa1100fb_blank():
 527  *      Blank the display by setting all palette values to zero.  Note, the
 528  *      12 and 16 bpp modes don't really use the palette, so this will not
 529  *      blank the display in all modes.
 530  */
 531 static int sa1100fb_blank(int blank, struct fb_info *info)
 532 {
 533         struct sa1100fb_info *fbi =
 534                 container_of(info, struct sa1100fb_info, fb);
 535         int i;
 536
 537         dev_dbg(fbi->dev, "sa1100fb_blank: blank=%d\n", blank);
 538
 539         switch (blank) {
 540         case FB_BLANK_POWERDOWN:
 541         case FB_BLANK_VSYNC_SUSPEND:
 542         case FB_BLANK_HSYNC_SUSPEND:
 543         case FB_BLANK_NORMAL:
 544                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 545                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 546                         for (i = 0; i < fbi->palette_size; i++)
 547                                 sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
 548                 sa1100fb_schedule_work(fbi, C_DISABLE);
 549                 break;
 550
 551         case FB_BLANK_UNBLANK:
 552                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 553                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 554                         fb_set_cmap(&fbi->fb.cmap, info);
 555                 sa1100fb_schedule_work(fbi, C_ENABLE);
 556         }
 557         return 0;
 558 }
 559
 560 static int sa1100fb_mmap(struct fb_info *info,
 561                          struct vm_area_struct *vma)
 562 {
 563         struct sa1100fb_info *fbi =
 564                 container_of(info, struct sa1100fb_info, fb);
 565         unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
 566
 567         if (off < info->fix.smem_len) {
 568                 vma->vm_pgoff += 1; /* skip over the palette */
 569                 return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
 570                                              fbi->map_dma, fbi->map_size);
 571         }
 572
 573         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 574
 575         return vm_iomap_memory(vma, info->fix.mmio_start, info->fix.mmio_len);
 576 }
 577
 578 static struct fb_ops sa1100fb_ops = {
 579         .owner          = THIS_MODULE,
 580         .fb_check_var   = sa1100fb_check_var,
 581         .fb_set_par     = sa1100fb_set_par,
 582 //      .fb_set_cmap    = sa1100fb_set_cmap,
 583         .fb_setcolreg   = sa1100fb_setcolreg,
 584         .fb_fillrect    = cfb_fillrect,
 585         .fb_copyarea    = cfb_copyarea,
 586         .fb_imageblit   = cfb_imageblit,
 587         .fb_blank       = sa1100fb_blank,
 588         .fb_mmap        = sa1100fb_mmap,
 589 };
 590
 591 /*
 592  * Calculate the PCD value from the clock rate (in picoseconds).
 593  * We take account of the PPCR clock setting.
 594  */
 595 static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock)
 596 {
 597         unsigned int pcd = cpuclock / 100;
 598
 599         pcd *= pixclock;
 600         pcd /= 10000000;
 601
 602         return pcd + 1; /* make up for integer math truncations */
 603 }
 604
 605 /*
 606  * sa1100fb_activate_var():
 607  *      Configures LCD Controller based on entries in var parameter.  Settings are
 608  *      only written to the controller if changes were made.
 609  */
 610 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
 611 {
 612         struct sa1100fb_lcd_reg new_regs;
 613         u_int half_screen_size, yres, pcd;
 614         u_long flags;
 615
 616         dev_dbg(fbi->dev, "Configuring SA1100 LCD\n");
 617
 618         dev_dbg(fbi->dev, "var: xres=%d hslen=%d lm=%d rm=%d\n",
 619                 var->xres, var->hsync_len,
 620                 var->left_margin, var->right_margin);
 621         dev_dbg(fbi->dev, "var: yres=%d vslen=%d um=%d bm=%d\n",
 622                 var->yres, var->vsync_len,
 623                 var->upper_margin, var->lower_margin);
 624
 625 #if DEBUG_VAR
 626         if (var->xres < 16        || var->xres > 1024)
 627                 dev_err(fbi->dev, "%s: invalid xres %d\n",
 628                         fbi->fb.fix.id, var->xres);
 629         if (var->hsync_len < 1    || var->hsync_len > 64)
 630                 dev_err(fbi->dev, "%s: invalid hsync_len %d\n",
 631                         fbi->fb.fix.id, var->hsync_len);
 632         if (var->left_margin < 1  || var->left_margin > 255)
 633                 dev_err(fbi->dev, "%s: invalid left_margin %d\n",
 634                         fbi->fb.fix.id, var->left_margin);
 635         if (var->right_margin < 1 || var->right_margin > 255)
 636                 dev_err(fbi->dev, "%s: invalid right_margin %d\n",
 637                         fbi->fb.fix.id, var->right_margin);
 638         if (var->yres < 1         || var->yres > 1024)
 639                 dev_err(fbi->dev, "%s: invalid yres %d\n",
 640                         fbi->fb.fix.id, var->yres);
 641         if (var->vsync_len < 1    || var->vsync_len > 64)
 642                 dev_err(fbi->dev, "%s: invalid vsync_len %d\n",
 643                         fbi->fb.fix.id, var->vsync_len);
 644         if (var->upper_margin < 0 || var->upper_margin > 255)
 645                 dev_err(fbi->dev, "%s: invalid upper_margin %d\n",
 646                         fbi->fb.fix.id, var->upper_margin);
 647         if (var->lower_margin < 0 || var->lower_margin > 255)
 648                 dev_err(fbi->dev, "%s: invalid lower_margin %d\n",
 649                         fbi->fb.fix.id, var->lower_margin);
 650 #endif
 651
 652         new_regs.lccr0 = fbi->inf->lccr0 |
 653                 LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
 654                 LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
 655
 656         new_regs.lccr1 =
 657                 LCCR1_DisWdth(var->xres) +
 658                 LCCR1_HorSnchWdth(var->hsync_len) +
 659                 LCCR1_BegLnDel(var->left_margin) +
 660                 LCCR1_EndLnDel(var->right_margin);
 661
 662         /*
 663          * If we have a dual scan LCD, then we need to halve
 664          * the YRES parameter.
 665          */
 666         yres = var->yres;
 667         if (fbi->inf->lccr0 & LCCR0_Dual)
 668                 yres /= 2;
 669
 670         new_regs.lccr2 =
 671                 LCCR2_DisHght(yres) +
 672                 LCCR2_VrtSnchWdth(var->vsync_len) +
 673                 LCCR2_BegFrmDel(var->upper_margin) +
 674                 LCCR2_EndFrmDel(var->lower_margin);
 675
 676         pcd = get_pcd(var->pixclock, cpufreq_get(0));
 677         new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->inf->lccr3 |
 678                 (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
 679                 (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
 680
 681         dev_dbg(fbi->dev, "nlccr0 = 0x%08lx\n", new_regs.lccr0);
 682         dev_dbg(fbi->dev, "nlccr1 = 0x%08lx\n", new_regs.lccr1);
 683         dev_dbg(fbi->dev, "nlccr2 = 0x%08lx\n", new_regs.lccr2);
 684         dev_dbg(fbi->dev, "nlccr3 = 0x%08lx\n", new_regs.lccr3);
 685
 686         half_screen_size = var->bits_per_pixel;
 687         half_screen_size = half_screen_size * var->xres * var->yres / 16;
 688
 689         /* Update shadow copy atomically */
 690         local_irq_save(flags);
 691         fbi->dbar1 = fbi->palette_dma;
 692         fbi->dbar2 = fbi->screen_dma + half_screen_size;
 693
 694         fbi->reg_lccr0 = new_regs.lccr0;
 695         fbi->reg_lccr1 = new_regs.lccr1;
 696         fbi->reg_lccr2 = new_regs.lccr2;
 697         fbi->reg_lccr3 = new_regs.lccr3;
 698         local_irq_restore(flags);
 699
 700         /*
 701          * Only update the registers if the controller is enabled
 702          * and something has changed.
 703          */
 704         if (readl_relaxed(fbi->base + LCCR0) != fbi->reg_lccr0 ||
 705             readl_relaxed(fbi->base + LCCR1) != fbi->reg_lccr1 ||
 706             readl_relaxed(fbi->base + LCCR2) != fbi->reg_lccr2 ||
 707             readl_relaxed(fbi->base + LCCR3) != fbi->reg_lccr3 ||
 708             readl_relaxed(fbi->base + DBAR1) != fbi->dbar1 ||
 709             readl_relaxed(fbi->base + 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                 unsigned long flags;
 765
 766                 /*
 767                  * SA-1100 requires the GPIO direction register set
 768                  * appropriately for the alternate function.  Hence
 769                  * we set it here via bitmask rather than excessive
 770                  * fiddling via the GPIO subsystem - and even then
 771                  * we'll still have to deal with GAFR.
 772                  */
 773                 local_irq_save(flags);
 774                 GPDR |= mask;
 775                 GAFR |= mask;
 776                 local_irq_restore(flags);
 777         }
 778 }
 779
 780 static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
 781 {
 782         dev_dbg(fbi->dev, "Enabling LCD controller\n");
 783
 784         /*
 785          * Make sure the mode bits are present in the first palette entry
 786          */
 787         fbi->palette_cpu[0] &= 0xcfff;
 788         fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
 789
 790         /* Sequence from 11.7.10 */
 791         writel_relaxed(fbi->reg_lccr3, fbi->base + LCCR3);
 792         writel_relaxed(fbi->reg_lccr2, fbi->base + LCCR2);
 793         writel_relaxed(fbi->reg_lccr1, fbi->base + LCCR1);
 794         writel_relaxed(fbi->reg_lccr0 & ~LCCR0_LEN, fbi->base + LCCR0);
 795         writel_relaxed(fbi->dbar1, fbi->base + DBAR1);
 796         writel_relaxed(fbi->dbar2, fbi->base + DBAR2);
 797         writel_relaxed(fbi->reg_lccr0 | LCCR0_LEN, fbi->base + LCCR0);
 798
 799         if (machine_is_shannon())
 800                 gpio_set_value(SHANNON_GPIO_DISP_EN, 1);
 801
 802         dev_dbg(fbi->dev, "DBAR1: 0x%08x\n", readl_relaxed(fbi->base + DBAR1));
 803         dev_dbg(fbi->dev, "DBAR2: 0x%08x\n", readl_relaxed(fbi->base + DBAR2));
 804         dev_dbg(fbi->dev, "LCCR0: 0x%08x\n", readl_relaxed(fbi->base + LCCR0));
 805         dev_dbg(fbi->dev, "LCCR1: 0x%08x\n", readl_relaxed(fbi->base + LCCR1));
 806         dev_dbg(fbi->dev, "LCCR2: 0x%08x\n", readl_relaxed(fbi->base + LCCR2));
 807         dev_dbg(fbi->dev, "LCCR3: 0x%08x\n", readl_relaxed(fbi->base + LCCR3));
 808 }
 809
 810 static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
 811 {
 812         DECLARE_WAITQUEUE(wait, current);
 813         u32 lccr0;
 814
 815         dev_dbg(fbi->dev, "Disabling LCD controller\n");
 816
 817         if (machine_is_shannon())
 818                 gpio_set_value(SHANNON_GPIO_DISP_EN, 0);
 819
 820         set_current_state(TASK_UNINTERRUPTIBLE);
 821         add_wait_queue(&fbi->ctrlr_wait, &wait);
 822
 823         /* Clear LCD Status Register */
 824         writel_relaxed(~0, fbi->base + LCSR);
 825
 826         lccr0 = readl_relaxed(fbi->base + LCCR0);
 827         lccr0 &= ~LCCR0_LDM;    /* Enable LCD Disable Done Interrupt */
 828         writel_relaxed(lccr0, fbi->base + LCCR0);
 829         lccr0 &= ~LCCR0_LEN;    /* Disable LCD Controller */
 830         writel_relaxed(lccr0, fbi->base + LCCR0);
 831
 832         schedule_timeout(20 * HZ / 1000);
 833         remove_wait_queue(&fbi->ctrlr_wait, &wait);
 834 }
 835
 836 /*
 837  *  sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
 838  */
 839 static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
 840 {
 841         struct sa1100fb_info *fbi = dev_id;
 842         unsigned int lcsr = readl_relaxed(fbi->base + LCSR);
 843
 844         if (lcsr & LCSR_LDD) {
 845                 u32 lccr0 = readl_relaxed(fbi->base + LCCR0) | LCCR0_LDM;
 846                 writel_relaxed(lccr0, fbi->base + LCCR0);
 847                 wake_up(&fbi->ctrlr_wait);
 848         }
 849
 850         writel_relaxed(lcsr, fbi->base + LCSR);
 851         return IRQ_HANDLED;
 852 }
 853
 854 /*
 855  * This function must be called from task context only, since it will
 856  * sleep when disabling the LCD controller, or if we get two contending
 857  * processes trying to alter state.
 858  */
 859 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 860 {
 861         u_int old_state;
 862
 863         mutex_lock(&fbi->ctrlr_lock);
 864
 865         old_state = fbi->state;
 866
 867         /*
 868          * Hack around fbcon initialisation.
 869          */
 870         if (old_state == C_STARTUP && state == C_REENABLE)
 871                 state = C_ENABLE;
 872
 873         switch (state) {
 874         case C_DISABLE_CLKCHANGE:
 875                 /*
 876                  * Disable controller for clock change.  If the
 877                  * controller is already disabled, then do nothing.
 878                  */
 879                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
 880                         fbi->state = state;
 881                         sa1100fb_disable_controller(fbi);
 882                 }
 883                 break;
 884
 885         case C_DISABLE_PM:
 886         case C_DISABLE:
 887                 /*
 888                  * Disable controller
 889                  */
 890                 if (old_state != C_DISABLE) {
 891                         fbi->state = state;
 892
 893                         __sa1100fb_backlight_power(fbi, 0);
 894                         if (old_state != C_DISABLE_CLKCHANGE)
 895                                 sa1100fb_disable_controller(fbi);
 896                         __sa1100fb_lcd_power(fbi, 0);
 897                 }
 898                 break;
 899
 900         case C_ENABLE_CLKCHANGE:
 901                 /*
 902                  * Enable the controller after clock change.  Only
 903                  * do this if we were disabled for the clock change.
 904                  */
 905                 if (old_state == C_DISABLE_CLKCHANGE) {
 906                         fbi->state = C_ENABLE;
 907                         sa1100fb_enable_controller(fbi);
 908                 }
 909                 break;
 910
 911         case C_REENABLE:
 912                 /*
 913                  * Re-enable the controller only if it was already
 914                  * enabled.  This is so we reprogram the control
 915                  * registers.
 916                  */
 917                 if (old_state == C_ENABLE) {
 918                         sa1100fb_disable_controller(fbi);
 919                         sa1100fb_setup_gpio(fbi);
 920                         sa1100fb_enable_controller(fbi);
 921                 }
 922                 break;
 923
 924         case C_ENABLE_PM:
 925                 /*
 926                  * Re-enable the controller after PM.  This is not
 927                  * perfect - think about the case where we were doing
 928                  * a clock change, and we suspended half-way through.
 929                  */
 930                 if (old_state != C_DISABLE_PM)
 931                         break;
 932                 /* fall through */
 933
 934         case C_ENABLE:
 935                 /*
 936                  * Power up the LCD screen, enable controller, and
 937                  * turn on the backlight.
 938                  */
 939                 if (old_state != C_ENABLE) {
 940                         fbi->state = C_ENABLE;
 941                         sa1100fb_setup_gpio(fbi);
 942                         __sa1100fb_lcd_power(fbi, 1);
 943                         sa1100fb_enable_controller(fbi);
 944                         __sa1100fb_backlight_power(fbi, 1);
 945                 }
 946                 break;
 947         }
 948         mutex_unlock(&fbi->ctrlr_lock);
 949 }
 950
 951 /*
 952  * Our LCD controller task (which is called when we blank or unblank)
 953  * via keventd.
 954  */
 955 static void sa1100fb_task(struct work_struct *w)
 956 {
 957         struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
 958         u_int state = xchg(&fbi->task_state, -1);
 959
 960         set_ctrlr_state(fbi, state);
 961 }
 962
 963 #ifdef CONFIG_CPU_FREQ
 964 /*
 965  * Calculate the minimum DMA period over all displays that we own.
 966  * This, together with the SDRAM bandwidth defines the slowest CPU
 967  * frequency that can be selected.
 968  */
 969 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 970 {
 971 #if 0
 972         unsigned int min_period = (unsigned int)-1;
 973         int i;
 974
 975         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 976                 struct display *disp = &fb_display[i];
 977                 unsigned int period;
 978
 979                 /*
 980                  * Do we own this display?
 981                  */
 982                 if (disp->fb_info != &fbi->fb)
 983                         continue;
 984
 985                 /*
 986                  * Ok, calculate its DMA period
 987                  */
 988                 period = sa1100fb_display_dma_period(&disp->var);
 989                 if (period < min_period)
 990                         min_period = period;
 991         }
 992
 993         return min_period;
 994 #else
 995         /*
 996          * FIXME: we need to verify _all_ consoles.
 997          */
 998         return sa1100fb_display_dma_period(&fbi->fb.var);
 999 #endif
1000 }
1001
1002 /*
1003  * CPU clock speed change handler.  We need to adjust the LCD timing
1004  * parameters when the CPU clock is adjusted by the power management
1005  * subsystem.
1006  */
1007 static int
1008 sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val,
1009                          void *data)
1010 {
1011         struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
1012         struct cpufreq_freqs *f = data;
1013         u_int pcd;
1014
1015         switch (val) {
1016         case CPUFREQ_PRECHANGE:
1017                 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1018                 break;
1019
1020         case CPUFREQ_POSTCHANGE:
1021                 pcd = get_pcd(fbi->fb.var.pixclock, f->new);
1022                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
1023                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1024                 break;
1025         }
1026         return 0;
1027 }
1028
1029 static int
1030 sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
1031                      void *data)
1032 {
1033         struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
1034         struct cpufreq_policy *policy = data;
1035
1036         switch (val) {
1037         case CPUFREQ_ADJUST:
1038         case CPUFREQ_INCOMPATIBLE:
1039                 dev_dbg(fbi->dev, "min dma period: %d ps, "
1040                         "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
1041                         policy->max);
1042                 /* todo: fill in min/max values */
1043                 break;
1044         case CPUFREQ_NOTIFY:
1045                 do {} while(0);
1046                 /* todo: panic if min/max values aren't fulfilled
1047                  * [can't really happen unless there's a bug in the
1048                  * CPU policy verififcation process *
1049                  */
1050                 break;
1051         }
1052         return 0;
1053 }
1054 #endif
1055
1056 #ifdef CONFIG_PM
1057 /*
1058  * Power management hooks.  Note that we won't be called from IRQ context,
1059  * unlike the blank functions above, so we may sleep.
1060  */
1061 static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
1062 {
1063         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1064
1065         set_ctrlr_state(fbi, C_DISABLE_PM);
1066         return 0;
1067 }
1068
1069 static int sa1100fb_resume(struct platform_device *dev)
1070 {
1071         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1072
1073         set_ctrlr_state(fbi, C_ENABLE_PM);
1074         return 0;
1075 }
1076 #else
1077 #define sa1100fb_suspend        NULL
1078 #define sa1100fb_resume         NULL
1079 #endif
1080
1081 /*
1082  * sa1100fb_map_video_memory():
1083  *      Allocates the DRAM memory for the frame buffer.  This buffer is
1084  *      remapped into a non-cached, non-buffered, memory region to
1085  *      allow palette and pixel writes to occur without flushing the
1086  *      cache.  Once this area is remapped, all virtual memory
1087  *      access to the video memory should occur at the new region.
1088  */
1089 static int sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
1090 {
1091         /*
1092          * We reserve one page for the palette, plus the size
1093          * of the framebuffer.
1094          */
1095         fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
1096         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
1097                                               &fbi->map_dma, GFP_KERNEL);
1098
1099         if (fbi->map_cpu) {
1100                 fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
1101                 fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
1102                 /*
1103                  * FIXME: this is actually the wrong thing to place in
1104                  * smem_start.  But fbdev suffers from the problem that
1105                  * it needs an API which doesn't exist (in this case,
1106                  * dma_writecombine_mmap)
1107                  */
1108                 fbi->fb.fix.smem_start = fbi->screen_dma;
1109         }
1110
1111         return fbi->map_cpu ? 0 : -ENOMEM;
1112 }
1113
1114 /* Fake monspecs to fill in fbinfo structure */
1115 static struct fb_monspecs monspecs = {
1116         .hfmin  = 30000,
1117         .hfmax  = 70000,
1118         .vfmin  = 50,
1119         .vfmax  = 65,
1120 };
1121
1122
1123 static struct sa1100fb_info *sa1100fb_init_fbinfo(struct device *dev)
1124 {
1125         struct sa1100fb_mach_info *inf = dev_get_platdata(dev);
1126         struct sa1100fb_info *fbi;
1127         unsigned i;
1128
1129         fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
1130                       GFP_KERNEL);
1131         if (!fbi)
1132                 return NULL;
1133
1134         memset(fbi, 0, sizeof(struct sa1100fb_info));
1135         fbi->dev = dev;
1136
1137         strcpy(fbi->fb.fix.id, SA1100_NAME);
1138
1139         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1140         fbi->fb.fix.type_aux    = 0;
1141         fbi->fb.fix.xpanstep    = 0;
1142         fbi->fb.fix.ypanstep    = 0;
1143         fbi->fb.fix.ywrapstep   = 0;
1144         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1145
1146         fbi->fb.var.nonstd      = 0;
1147         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1148         fbi->fb.var.height      = -1;
1149         fbi->fb.var.width       = -1;
1150         fbi->fb.var.accel_flags = 0;
1151         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1152
1153         fbi->fb.fbops           = &sa1100fb_ops;
1154         fbi->fb.flags           = FBINFO_DEFAULT;
1155         fbi->fb.monspecs        = monspecs;
1156         fbi->fb.pseudo_palette  = (fbi + 1);
1157
1158         fbi->rgb[RGB_4]         = &rgb_4;
1159         fbi->rgb[RGB_8]         = &rgb_8;
1160         fbi->rgb[RGB_16]        = &def_rgb_16;
1161
1162         /*
1163          * People just don't seem to get this.  We don't support
1164          * anything but correct entries now, so panic if someone
1165          * does something stupid.
1166          */
1167         if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
1168             inf->pixclock == 0)
1169                 panic("sa1100fb error: invalid LCCR3 fields set or zero "
1170                         "pixclock.");
1171
1172         fbi->fb.var.xres                = inf->xres;
1173         fbi->fb.var.xres_virtual        = inf->xres;
1174         fbi->fb.var.yres                = inf->yres;
1175         fbi->fb.var.yres_virtual        = inf->yres;
1176         fbi->fb.var.bits_per_pixel      = inf->bpp;
1177         fbi->fb.var.pixclock            = inf->pixclock;
1178         fbi->fb.var.hsync_len           = inf->hsync_len;
1179         fbi->fb.var.left_margin         = inf->left_margin;
1180         fbi->fb.var.right_margin        = inf->right_margin;
1181         fbi->fb.var.vsync_len           = inf->vsync_len;
1182         fbi->fb.var.upper_margin        = inf->upper_margin;
1183         fbi->fb.var.lower_margin        = inf->lower_margin;
1184         fbi->fb.var.sync                = inf->sync;
1185         fbi->fb.var.grayscale           = inf->cmap_greyscale;
1186         fbi->state                      = C_STARTUP;
1187         fbi->task_state                 = (u_char)-1;
1188         fbi->fb.fix.smem_len            = inf->xres * inf->yres *
1189                                           inf->bpp / 8;
1190         fbi->inf                        = inf;
1191
1192         /* Copy the RGB bitfield overrides */
1193         for (i = 0; i < NR_RGB; i++)
1194                 if (inf->rgb[i])
1195                         fbi->rgb[i] = inf->rgb[i];
1196
1197         init_waitqueue_head(&fbi->ctrlr_wait);
1198         INIT_WORK(&fbi->task, sa1100fb_task);
1199         mutex_init(&fbi->ctrlr_lock);
1200
1201         return fbi;
1202 }
1203
1204 static int sa1100fb_probe(struct platform_device *pdev)
1205 {
1206         struct sa1100fb_info *fbi;
1207         struct resource *res;
1208         int ret, irq;
1209
1210         if (!dev_get_platdata(&pdev->dev)) {
1211                 dev_err(&pdev->dev, "no platform LCD data\n");
1212                 return -EINVAL;
1213         }
1214
1215         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1216         irq = platform_get_irq(pdev, 0);
1217         if (irq < 0 || !res)
1218                 return -EINVAL;
1219
1220         if (!request_mem_region(res->start, resource_size(res), "LCD"))
1221                 return -EBUSY;
1222
1223         fbi = sa1100fb_init_fbinfo(&pdev->dev);
1224         ret = -ENOMEM;
1225         if (!fbi)
1226                 goto failed;
1227
1228         fbi->base = ioremap(res->start, resource_size(res));
1229         if (!fbi->base)
1230                 goto failed;
1231
1232         /* Initialize video memory */
1233         ret = sa1100fb_map_video_memory(fbi);
1234         if (ret)
1235                 goto failed;
1236
1237         ret = request_irq(irq, sa1100fb_handle_irq, 0, "LCD", fbi);
1238         if (ret) {
1239                 dev_err(&pdev->dev, "request_irq failed: %d\n", ret);
1240                 goto failed;
1241         }
1242
1243         if (machine_is_shannon()) {
1244                 ret = gpio_request_one(SHANNON_GPIO_DISP_EN,
1245                         GPIOF_OUT_INIT_LOW, "display enable");
1246                 if (ret)
1247                         goto err_free_irq;
1248         }
1249
1250         /*
1251          * This makes sure that our colour bitfield
1252          * descriptors are correctly initialised.
1253          */
1254         sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
1255
1256         platform_set_drvdata(pdev, fbi);
1257
1258         ret = register_framebuffer(&fbi->fb);
1259         if (ret < 0)
1260                 goto err_reg_fb;
1261
1262 #ifdef CONFIG_CPU_FREQ
1263         fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
1264         fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
1265         cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
1266         cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
1267 #endif
1268
1269         /* This driver cannot be unloaded at the moment */
1270         return 0;
1271
1272  err_reg_fb:
1273         if (machine_is_shannon())
1274                 gpio_free(SHANNON_GPIO_DISP_EN);
1275  err_free_irq:
1276         free_irq(irq, fbi);
1277  failed:
1278         if (fbi)
1279                 iounmap(fbi->base);
1280         kfree(fbi);
1281         release_mem_region(res->start, resource_size(res));
1282         return ret;
1283 }
1284
1285 static struct platform_driver sa1100fb_driver = {
1286         .probe          = sa1100fb_probe,
1287         .suspend        = sa1100fb_suspend,
1288         .resume         = sa1100fb_resume,
1289         .driver         = {
1290                 .name   = "sa11x0-fb",
1291                 .owner  = THIS_MODULE,
1292         },
1293 };
1294
1295 int __init sa1100fb_init(void)
1296 {
1297         if (fb_get_options("sa1100fb", NULL))
1298                 return -ENODEV;
1299
1300         return platform_driver_register(&sa1100fb_driver);
1301 }
1302
1303 int __init sa1100fb_setup(char *options)
1304 {
1305 #if 0
1306         char *this_opt;
1307
1308         if (!options || !*options)
1309                 return 0;
1310
1311         while ((this_opt = strsep(&options, ",")) != NULL) {
1312
1313                 if (!strncmp(this_opt, "bpp:", 4))
1314                         current_par.max_bpp =
1315                             simple_strtoul(this_opt + 4, NULL, 0);
1316
1317                 if (!strncmp(this_opt, "lccr0:", 6))
1318                         lcd_shadow.lccr0 =
1319                             simple_strtoul(this_opt + 6, NULL, 0);
1320                 if (!strncmp(this_opt, "lccr1:", 6)) {
1321                         lcd_shadow.lccr1 =
1322                             simple_strtoul(this_opt + 6, NULL, 0);
1323                         current_par.max_xres =
1324                             (lcd_shadow.lccr1 & 0x3ff) + 16;
1325                 }
1326                 if (!strncmp(this_opt, "lccr2:", 6)) {
1327                         lcd_shadow.lccr2 =
1328                             simple_strtoul(this_opt + 6, NULL, 0);
1329                         current_par.max_yres =
1330                             (lcd_shadow.
1331                              lccr0 & LCCR0_SDS) ? ((lcd_shadow.
1332                                                     lccr2 & 0x3ff) +
1333                                                    1) *
1334                             2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
1335                 }
1336                 if (!strncmp(this_opt, "lccr3:", 6))
1337                         lcd_shadow.lccr3 =
1338                             simple_strtoul(this_opt + 6, NULL, 0);
1339         }
1340 #endif
1341         return 0;
1342 }
1343
1344 module_init(sa1100fb_init);
1345 MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
1346 MODULE_LICENSE("GPL");