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/assabet.h>
 186 #include <mach/shannon.h>
 187
 188 /*
 189  * Complain if VAR is out of range.
 190  */
 191 #define DEBUG_VAR 1
 192
 193 #undef ASSABET_PAL_VIDEO
 194
 195 #include "sa1100fb.h"
 196
 197 static const struct sa1100fb_rgb rgb_4 = {
 198         .red    = { .offset = 0,  .length = 4, },
 199         .green  = { .offset = 0,  .length = 4, },
 200         .blue   = { .offset = 0,  .length = 4, },
 201         .transp = { .offset = 0,  .length = 0, },
 202 };
 203
 204 static const struct sa1100fb_rgb rgb_8 = {
 205         .red    = { .offset = 0,  .length = 8, },
 206         .green  = { .offset = 0,  .length = 8, },
 207         .blue   = { .offset = 0,  .length = 8, },
 208         .transp = { .offset = 0,  .length = 0, },
 209 };
 210
 211 static const struct sa1100fb_rgb def_rgb_16 = {
 212         .red    = { .offset = 11, .length = 5, },
 213         .green  = { .offset = 5,  .length = 6, },
 214         .blue   = { .offset = 0,  .length = 5, },
 215         .transp = { .offset = 0,  .length = 0, },
 216 };
 217
 218
 219
 220 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
 221 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);
 222
 223 static inline void sa1100fb_schedule_work(struct sa1100fb_info *fbi, u_int state)
 224 {
 225         unsigned long flags;
 226
 227         local_irq_save(flags);
 228         /*
 229          * We need to handle two requests being made at the same time.
 230          * There are two important cases:
 231          *  1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
 232          *     We must perform the unblanking, which will do our REENABLE for us.
 233          *  2. When we are blanking, but immediately unblank before we have
 234          *     blanked.  We do the "REENABLE" thing here as well, just to be sure.
 235          */
 236         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
 237                 state = (u_int) -1;
 238         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
 239                 state = C_REENABLE;
 240
 241         if (state != (u_int)-1) {
 242                 fbi->task_state = state;
 243                 schedule_work(&fbi->task);
 244         }
 245         local_irq_restore(flags);
 246 }
 247
 248 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 249 {
 250         chan &= 0xffff;
 251         chan >>= 16 - bf->length;
 252         return chan << bf->offset;
 253 }
 254
 255 /*
 256  * Convert bits-per-pixel to a hardware palette PBS value.
 257  */
 258 static inline u_int palette_pbs(struct fb_var_screeninfo *var)
 259 {
 260         int ret = 0;
 261         switch (var->bits_per_pixel) {
 262         case 4:  ret = 0 << 12; break;
 263         case 8:  ret = 1 << 12; break;
 264         case 16: ret = 2 << 12; break;
 265         }
 266         return ret;
 267 }
 268
 269 static int
 270 sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
 271                        u_int trans, struct fb_info *info)
 272 {
 273         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 274         u_int val, ret = 1;
 275
 276         if (regno < fbi->palette_size) {
 277                 val = ((red >> 4) & 0xf00);
 278                 val |= ((green >> 8) & 0x0f0);
 279                 val |= ((blue >> 12) & 0x00f);
 280
 281                 if (regno == 0)
 282                         val |= palette_pbs(&fbi->fb.var);
 283
 284                 fbi->palette_cpu[regno] = val;
 285                 ret = 0;
 286         }
 287         return ret;
 288 }
 289
 290 static int
 291 sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 292                    u_int trans, struct fb_info *info)
 293 {
 294         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 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->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 = (struct sa1100fb_info *)info;
 372         int rgbidx;
 373
 374         if (var->xres < MIN_XRES)
 375                 var->xres = MIN_XRES;
 376         if (var->yres < MIN_YRES)
 377                 var->yres = MIN_YRES;
 378         if (var->xres > fbi->max_xres)
 379                 var->xres = fbi->max_xres;
 380         if (var->yres > fbi->max_yres)
 381                 var->yres = fbi->max_yres;
 382         var->xres_virtual = max(var->xres_virtual, var->xres);
 383         var->yres_virtual = max(var->yres_virtual, var->yres);
 384
 385         dev_dbg(fbi->dev, "var->bits_per_pixel=%d\n", var->bits_per_pixel);
 386         switch (var->bits_per_pixel) {
 387         case 4:
 388                 rgbidx = RGB_4;
 389                 break;
 390         case 8:
 391                 rgbidx = RGB_8;
 392                 break;
 393         case 16:
 394                 rgbidx = RGB_16;
 395                 break;
 396         default:
 397                 return -EINVAL;
 398         }
 399
 400         /*
 401          * Copy the RGB parameters for this display
 402          * from the machine specific parameters.
 403          */
 404         var->red    = fbi->rgb[rgbidx]->red;
 405         var->green  = fbi->rgb[rgbidx]->green;
 406         var->blue   = fbi->rgb[rgbidx]->blue;
 407         var->transp = fbi->rgb[rgbidx]->transp;
 408
 409         dev_dbg(fbi->dev, "RGBT length = %d:%d:%d:%d\n",
 410                 var->red.length, var->green.length, var->blue.length,
 411                 var->transp.length);
 412
 413         dev_dbg(fbi->dev, "RGBT offset = %d:%d:%d:%d\n",
 414                 var->red.offset, var->green.offset, var->blue.offset,
 415                 var->transp.offset);
 416
 417 #ifdef CONFIG_CPU_FREQ
 418         dev_dbg(fbi->dev, "dma period = %d ps, clock = %d kHz\n",
 419                 sa1100fb_display_dma_period(var),
 420                 cpufreq_get(smp_processor_id()));
 421 #endif
 422
 423         return 0;
 424 }
 425
 426 static void sa1100fb_set_visual(struct sa1100fb_info *fbi, u32 visual)
 427 {
 428         if (fbi->inf->set_visual)
 429                 fbi->inf->set_visual(visual);
 430 }
 431
 432 /*
 433  * sa1100fb_set_par():
 434  *      Set the user defined part of the display for the specified console
 435  */
 436 static int sa1100fb_set_par(struct fb_info *info)
 437 {
 438         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 439         struct fb_var_screeninfo *var = &info->var;
 440         unsigned long palette_mem_size;
 441
 442         dev_dbg(fbi->dev, "set_par\n");
 443
 444         if (var->bits_per_pixel == 16)
 445                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 446         else if (!fbi->cmap_static)
 447                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 448         else {
 449                 /*
 450                  * Some people have weird ideas about wanting static
 451                  * pseudocolor maps.  I suspect their user space
 452                  * applications are broken.
 453                  */
 454                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 455         }
 456
 457         fbi->fb.fix.line_length = var->xres_virtual *
 458                                   var->bits_per_pixel / 8;
 459         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 460
 461         palette_mem_size = fbi->palette_size * sizeof(u16);
 462
 463         dev_dbg(fbi->dev, "palette_mem_size = 0x%08lx\n", palette_mem_size);
 464
 465         fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
 466         fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
 467
 468         /*
 469          * Set (any) board control register to handle new color depth
 470          */
 471         sa1100fb_set_visual(fbi, fbi->fb.fix.visual);
 472         sa1100fb_activate_var(var, fbi);
 473
 474         return 0;
 475 }
 476
 477 #if 0
 478 static int
 479 sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
 480                   struct fb_info *info)
 481 {
 482         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 483
 484         /*
 485          * Make sure the user isn't doing something stupid.
 486          */
 487         if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->cmap_static))
 488                 return -EINVAL;
 489
 490         return gen_set_cmap(cmap, kspc, con, info);
 491 }
 492 #endif
 493
 494 /*
 495  * Formal definition of the VESA spec:
 496  *  On
 497  *      This refers to the state of the display when it is in full operation
 498  *  Stand-By
 499  *      This defines an optional operating state of minimal power reduction with
 500  *      the shortest recovery time
 501  *  Suspend
 502  *      This refers to a level of power management in which substantial power
 503  *      reduction is achieved by the display.  The display can have a longer
 504  *      recovery time from this state than from the Stand-by state
 505  *  Off
 506  *      This indicates that the display is consuming the lowest level of power
 507  *      and is non-operational. Recovery from this state may optionally require
 508  *      the user to manually power on the monitor
 509  *
 510  *  Now, the fbdev driver adds an additional state, (blank), where they
 511  *  turn off the video (maybe by colormap tricks), but don't mess with the
 512  *  video itself: think of it semantically between on and Stand-By.
 513  *
 514  *  So here's what we should do in our fbdev blank routine:
 515  *
 516  *      VESA_NO_BLANKING (mode 0)       Video on,  front/back light on
 517  *      VESA_VSYNC_SUSPEND (mode 1)     Video on,  front/back light off
 518  *      VESA_HSYNC_SUSPEND (mode 2)     Video on,  front/back light off
 519  *      VESA_POWERDOWN (mode 3)         Video off, front/back light off
 520  *
 521  *  This will match the matrox implementation.
 522  */
 523 /*
 524  * sa1100fb_blank():
 525  *      Blank the display by setting all palette values to zero.  Note, the
 526  *      12 and 16 bpp modes don't really use the palette, so this will not
 527  *      blank the display in all modes.
 528  */
 529 static int sa1100fb_blank(int blank, struct fb_info *info)
 530 {
 531         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 532         int i;
 533
 534         dev_dbg(fbi->dev, "sa1100fb_blank: blank=%d\n", blank);
 535
 536         switch (blank) {
 537         case FB_BLANK_POWERDOWN:
 538         case FB_BLANK_VSYNC_SUSPEND:
 539         case FB_BLANK_HSYNC_SUSPEND:
 540         case FB_BLANK_NORMAL:
 541                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 542                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 543                         for (i = 0; i < fbi->palette_size; i++)
 544                                 sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
 545                 sa1100fb_schedule_work(fbi, C_DISABLE);
 546                 break;
 547
 548         case FB_BLANK_UNBLANK:
 549                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 550                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 551                         fb_set_cmap(&fbi->fb.cmap, info);
 552                 sa1100fb_schedule_work(fbi, C_ENABLE);
 553         }
 554         return 0;
 555 }
 556
 557 static int sa1100fb_mmap(struct fb_info *info,
 558                          struct vm_area_struct *vma)
 559 {
 560         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 561         unsigned long start, len, off = vma->vm_pgoff << PAGE_SHIFT;
 562
 563         if (off < info->fix.smem_len) {
 564                 vma->vm_pgoff += 1; /* skip over the palette */
 565                 return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
 566                                              fbi->map_dma, fbi->map_size);
 567         }
 568
 569         start = info->fix.mmio_start;
 570         len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
 571
 572         if ((vma->vm_end - vma->vm_start + off) > len)
 573                 return -EINVAL;
 574
 575         off += start & PAGE_MASK;
 576         vma->vm_pgoff = off >> PAGE_SHIFT;
 577         vma->vm_flags |= VM_IO;
 578         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 579         return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 580                                    vma->vm_end - vma->vm_start,
 581                                    vma->vm_page_prot);
 582 }
 583
 584 static struct fb_ops sa1100fb_ops = {
 585         .owner          = THIS_MODULE,
 586         .fb_check_var   = sa1100fb_check_var,
 587         .fb_set_par     = sa1100fb_set_par,
 588 //      .fb_set_cmap    = sa1100fb_set_cmap,
 589         .fb_setcolreg   = sa1100fb_setcolreg,
 590         .fb_fillrect    = cfb_fillrect,
 591         .fb_copyarea    = cfb_copyarea,
 592         .fb_imageblit   = cfb_imageblit,
 593         .fb_blank       = sa1100fb_blank,
 594         .fb_mmap        = sa1100fb_mmap,
 595 };
 596
 597 /*
 598  * Calculate the PCD value from the clock rate (in picoseconds).
 599  * We take account of the PPCR clock setting.
 600  */
 601 static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock)
 602 {
 603         unsigned int pcd = cpuclock / 100;
 604
 605         pcd *= pixclock;
 606         pcd /= 10000000;
 607
 608         return pcd + 1; /* make up for integer math truncations */
 609 }
 610
 611 /*
 612  * sa1100fb_activate_var():
 613  *      Configures LCD Controller based on entries in var parameter.  Settings are
 614  *      only written to the controller if changes were made.
 615  */
 616 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
 617 {
 618         struct sa1100fb_lcd_reg new_regs;
 619         u_int half_screen_size, yres, pcd;
 620         u_long flags;
 621
 622         dev_dbg(fbi->dev, "Configuring SA1100 LCD\n");
 623
 624         dev_dbg(fbi->dev, "var: xres=%d hslen=%d lm=%d rm=%d\n",
 625                 var->xres, var->hsync_len,
 626                 var->left_margin, var->right_margin);
 627         dev_dbg(fbi->dev, "var: yres=%d vslen=%d um=%d bm=%d\n",
 628                 var->yres, var->vsync_len,
 629                 var->upper_margin, var->lower_margin);
 630
 631 #if DEBUG_VAR
 632         if (var->xres < 16        || var->xres > 1024)
 633                 dev_err(fbi->dev, "%s: invalid xres %d\n",
 634                         fbi->fb.fix.id, var->xres);
 635         if (var->hsync_len < 1    || var->hsync_len > 64)
 636                 dev_err(fbi->dev, "%s: invalid hsync_len %d\n",
 637                         fbi->fb.fix.id, var->hsync_len);
 638         if (var->left_margin < 1  || var->left_margin > 255)
 639                 dev_err(fbi->dev, "%s: invalid left_margin %d\n",
 640                         fbi->fb.fix.id, var->left_margin);
 641         if (var->right_margin < 1 || var->right_margin > 255)
 642                 dev_err(fbi->dev, "%s: invalid right_margin %d\n",
 643                         fbi->fb.fix.id, var->right_margin);
 644         if (var->yres < 1         || var->yres > 1024)
 645                 dev_err(fbi->dev, "%s: invalid yres %d\n",
 646                         fbi->fb.fix.id, var->yres);
 647         if (var->vsync_len < 1    || var->vsync_len > 64)
 648                 dev_err(fbi->dev, "%s: invalid vsync_len %d\n",
 649                         fbi->fb.fix.id, var->vsync_len);
 650         if (var->upper_margin < 0 || var->upper_margin > 255)
 651                 dev_err(fbi->dev, "%s: invalid upper_margin %d\n",
 652                         fbi->fb.fix.id, var->upper_margin);
 653         if (var->lower_margin < 0 || var->lower_margin > 255)
 654                 dev_err(fbi->dev, "%s: invalid lower_margin %d\n",
 655                         fbi->fb.fix.id, var->lower_margin);
 656 #endif
 657
 658         new_regs.lccr0 = fbi->lccr0 |
 659                 LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
 660                 LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
 661
 662         new_regs.lccr1 =
 663                 LCCR1_DisWdth(var->xres) +
 664                 LCCR1_HorSnchWdth(var->hsync_len) +
 665                 LCCR1_BegLnDel(var->left_margin) +
 666                 LCCR1_EndLnDel(var->right_margin);
 667
 668         /*
 669          * If we have a dual scan LCD, then we need to halve
 670          * the YRES parameter.
 671          */
 672         yres = var->yres;
 673         if (fbi->lccr0 & LCCR0_Dual)
 674                 yres /= 2;
 675
 676         new_regs.lccr2 =
 677                 LCCR2_DisHght(yres) +
 678                 LCCR2_VrtSnchWdth(var->vsync_len) +
 679                 LCCR2_BegFrmDel(var->upper_margin) +
 680                 LCCR2_EndFrmDel(var->lower_margin);
 681
 682         pcd = get_pcd(var->pixclock, cpufreq_get(0));
 683         new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->lccr3 |
 684                 (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
 685                 (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
 686
 687         dev_dbg(fbi->dev, "nlccr0 = 0x%08lx\n", new_regs.lccr0);
 688         dev_dbg(fbi->dev, "nlccr1 = 0x%08lx\n", new_regs.lccr1);
 689         dev_dbg(fbi->dev, "nlccr2 = 0x%08lx\n", new_regs.lccr2);
 690         dev_dbg(fbi->dev, "nlccr3 = 0x%08lx\n", new_regs.lccr3);
 691
 692         half_screen_size = var->bits_per_pixel;
 693         half_screen_size = half_screen_size * var->xres * var->yres / 16;
 694
 695         /* Update shadow copy atomically */
 696         local_irq_save(flags);
 697         fbi->dbar1 = fbi->palette_dma;
 698         fbi->dbar2 = fbi->screen_dma + half_screen_size;
 699
 700         fbi->reg_lccr0 = new_regs.lccr0;
 701         fbi->reg_lccr1 = new_regs.lccr1;
 702         fbi->reg_lccr2 = new_regs.lccr2;
 703         fbi->reg_lccr3 = new_regs.lccr3;
 704         local_irq_restore(flags);
 705
 706         /*
 707          * Only update the registers if the controller is enabled
 708          * and something has changed.
 709          */
 710         if ((LCCR0 != fbi->reg_lccr0)       || (LCCR1 != fbi->reg_lccr1) ||
 711             (LCCR2 != fbi->reg_lccr2)       || (LCCR3 != fbi->reg_lccr3) ||
 712             (DBAR1 != fbi->dbar1) || (DBAR2 != fbi->dbar2))
 713                 sa1100fb_schedule_work(fbi, C_REENABLE);
 714
 715         return 0;
 716 }
 717
 718 /*
 719  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
 720  * Do not call them directly; set_ctrlr_state does the correct serialisation
 721  * to ensure that things happen in the right way 100% of time time.
 722  *      -- rmk
 723  */
 724 static inline void __sa1100fb_backlight_power(struct sa1100fb_info *fbi, int on)
 725 {
 726         dev_dbg(fbi->dev, "backlight o%s\n", on ? "n" : "ff");
 727
 728         if (fbi->inf->backlight_power)
 729                 fbi->inf->backlight_power(on);
 730 }
 731
 732 static inline void __sa1100fb_lcd_power(struct sa1100fb_info *fbi, int on)
 733 {
 734         dev_dbg(fbi->dev, "LCD power o%s\n", on ? "n" : "ff");
 735
 736         if (fbi->inf->lcd_power)
 737                 fbi->inf->lcd_power(on);
 738 }
 739
 740 static void sa1100fb_setup_gpio(struct sa1100fb_info *fbi)
 741 {
 742         u_int mask = 0;
 743
 744         /*
 745          * Enable GPIO<9:2> for LCD use if:
 746          *  1. Active display, or
 747          *  2. Color Dual Passive display
 748          *
 749          * see table 11.8 on page 11-27 in the SA1100 manual
 750          *   -- Erik.
 751          *
 752          * SA1110 spec update nr. 25 says we can and should
 753          * clear LDD15 to 12 for 4 or 8bpp modes with active
 754          * panels.
 755          */
 756         if ((fbi->reg_lccr0 & LCCR0_CMS) == LCCR0_Color &&
 757             (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) != 0) {
 758                 mask = GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9  | GPIO_LDD8;
 759
 760                 if (fbi->fb.var.bits_per_pixel > 8 ||
 761                     (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) == LCCR0_Dual)
 762                         mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12;
 763
 764         }
 765
 766         if (mask) {
 767                 GPDR |= mask;
 768                 GAFR |= mask;
 769         }
 770 }
 771
 772 static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
 773 {
 774         dev_dbg(fbi->dev, "Enabling LCD controller\n");
 775
 776         /*
 777          * Make sure the mode bits are present in the first palette entry
 778          */
 779         fbi->palette_cpu[0] &= 0xcfff;
 780         fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
 781
 782         /* Sequence from 11.7.10 */
 783         LCCR3 = fbi->reg_lccr3;
 784         LCCR2 = fbi->reg_lccr2;
 785         LCCR1 = fbi->reg_lccr1;
 786         LCCR0 = fbi->reg_lccr0 & ~LCCR0_LEN;
 787         DBAR1 = fbi->dbar1;
 788         DBAR2 = fbi->dbar2;
 789         LCCR0 |= LCCR0_LEN;
 790
 791         if (machine_is_shannon()) {
 792                 GPDR |= SHANNON_GPIO_DISP_EN;
 793                 GPSR |= SHANNON_GPIO_DISP_EN;
 794         }
 795
 796         dev_dbg(fbi->dev, "DBAR1 = 0x%08lx\n", DBAR1);
 797         dev_dbg(fbi->dev, "DBAR2 = 0x%08lx\n", DBAR2);
 798         dev_dbg(fbi->dev, "LCCR0 = 0x%08lx\n", LCCR0);
 799         dev_dbg(fbi->dev, "LCCR1 = 0x%08lx\n", LCCR1);
 800         dev_dbg(fbi->dev, "LCCR2 = 0x%08lx\n", LCCR2);
 801         dev_dbg(fbi->dev, "LCCR3 = 0x%08lx\n", LCCR3);
 802 }
 803
 804 static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
 805 {
 806         DECLARE_WAITQUEUE(wait, current);
 807
 808         dev_dbg(fbi->dev, "Disabling LCD controller\n");
 809
 810         if (machine_is_shannon()) {
 811                 GPCR |= SHANNON_GPIO_DISP_EN;
 812         }
 813
 814         set_current_state(TASK_UNINTERRUPTIBLE);
 815         add_wait_queue(&fbi->ctrlr_wait, &wait);
 816
 817         LCSR = 0xffffffff;      /* Clear LCD Status Register */
 818         LCCR0 &= ~LCCR0_LDM;    /* Enable LCD Disable Done Interrupt */
 819         LCCR0 &= ~LCCR0_LEN;    /* Disable LCD Controller */
 820
 821         schedule_timeout(20 * HZ / 1000);
 822         remove_wait_queue(&fbi->ctrlr_wait, &wait);
 823 }
 824
 825 /*
 826  *  sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
 827  */
 828 static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
 829 {
 830         struct sa1100fb_info *fbi = dev_id;
 831         unsigned int lcsr = LCSR;
 832
 833         if (lcsr & LCSR_LDD) {
 834                 LCCR0 |= LCCR0_LDM;
 835                 wake_up(&fbi->ctrlr_wait);
 836         }
 837
 838         LCSR = lcsr;
 839         return IRQ_HANDLED;
 840 }
 841
 842 /*
 843  * This function must be called from task context only, since it will
 844  * sleep when disabling the LCD controller, or if we get two contending
 845  * processes trying to alter state.
 846  */
 847 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 848 {
 849         u_int old_state;
 850
 851         mutex_lock(&fbi->ctrlr_lock);
 852
 853         old_state = fbi->state;
 854
 855         /*
 856          * Hack around fbcon initialisation.
 857          */
 858         if (old_state == C_STARTUP && state == C_REENABLE)
 859                 state = C_ENABLE;
 860
 861         switch (state) {
 862         case C_DISABLE_CLKCHANGE:
 863                 /*
 864                  * Disable controller for clock change.  If the
 865                  * controller is already disabled, then do nothing.
 866                  */
 867                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
 868                         fbi->state = state;
 869                         sa1100fb_disable_controller(fbi);
 870                 }
 871                 break;
 872
 873         case C_DISABLE_PM:
 874         case C_DISABLE:
 875                 /*
 876                  * Disable controller
 877                  */
 878                 if (old_state != C_DISABLE) {
 879                         fbi->state = state;
 880
 881                         __sa1100fb_backlight_power(fbi, 0);
 882                         if (old_state != C_DISABLE_CLKCHANGE)
 883                                 sa1100fb_disable_controller(fbi);
 884                         __sa1100fb_lcd_power(fbi, 0);
 885                 }
 886                 break;
 887
 888         case C_ENABLE_CLKCHANGE:
 889                 /*
 890                  * Enable the controller after clock change.  Only
 891                  * do this if we were disabled for the clock change.
 892                  */
 893                 if (old_state == C_DISABLE_CLKCHANGE) {
 894                         fbi->state = C_ENABLE;
 895                         sa1100fb_enable_controller(fbi);
 896                 }
 897                 break;
 898
 899         case C_REENABLE:
 900                 /*
 901                  * Re-enable the controller only if it was already
 902                  * enabled.  This is so we reprogram the control
 903                  * registers.
 904                  */
 905                 if (old_state == C_ENABLE) {
 906                         sa1100fb_disable_controller(fbi);
 907                         sa1100fb_setup_gpio(fbi);
 908                         sa1100fb_enable_controller(fbi);
 909                 }
 910                 break;
 911
 912         case C_ENABLE_PM:
 913                 /*
 914                  * Re-enable the controller after PM.  This is not
 915                  * perfect - think about the case where we were doing
 916                  * a clock change, and we suspended half-way through.
 917                  */
 918                 if (old_state != C_DISABLE_PM)
 919                         break;
 920                 /* fall through */
 921
 922         case C_ENABLE:
 923                 /*
 924                  * Power up the LCD screen, enable controller, and
 925                  * turn on the backlight.
 926                  */
 927                 if (old_state != C_ENABLE) {
 928                         fbi->state = C_ENABLE;
 929                         sa1100fb_setup_gpio(fbi);
 930                         __sa1100fb_lcd_power(fbi, 1);
 931                         sa1100fb_enable_controller(fbi);
 932                         __sa1100fb_backlight_power(fbi, 1);
 933                 }
 934                 break;
 935         }
 936         mutex_unlock(&fbi->ctrlr_lock);
 937 }
 938
 939 /*
 940  * Our LCD controller task (which is called when we blank or unblank)
 941  * via keventd.
 942  */
 943 static void sa1100fb_task(struct work_struct *w)
 944 {
 945         struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
 946         u_int state = xchg(&fbi->task_state, -1);
 947
 948         set_ctrlr_state(fbi, state);
 949 }
 950
 951 #ifdef CONFIG_CPU_FREQ
 952 /*
 953  * Calculate the minimum DMA period over all displays that we own.
 954  * This, together with the SDRAM bandwidth defines the slowest CPU
 955  * frequency that can be selected.
 956  */
 957 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 958 {
 959 #if 0
 960         unsigned int min_period = (unsigned int)-1;
 961         int i;
 962
 963         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 964                 struct display *disp = &fb_display[i];
 965                 unsigned int period;
 966
 967                 /*
 968                  * Do we own this display?
 969                  */
 970                 if (disp->fb_info != &fbi->fb)
 971                         continue;
 972
 973                 /*
 974                  * Ok, calculate its DMA period
 975                  */
 976                 period = sa1100fb_display_dma_period(&disp->var);
 977                 if (period < min_period)
 978                         min_period = period;
 979         }
 980
 981         return min_period;
 982 #else
 983         /*
 984          * FIXME: we need to verify _all_ consoles.
 985          */
 986         return sa1100fb_display_dma_period(&fbi->fb.var);
 987 #endif
 988 }
 989
 990 /*
 991  * CPU clock speed change handler.  We need to adjust the LCD timing
 992  * parameters when the CPU clock is adjusted by the power management
 993  * subsystem.
 994  */
 995 static int
 996 sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val,
 997                          void *data)
 998 {
 999         struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
1000         struct cpufreq_freqs *f = data;
1001         u_int pcd;
1002
1003         switch (val) {
1004         case CPUFREQ_PRECHANGE:
1005                 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1006                 break;
1007
1008         case CPUFREQ_POSTCHANGE:
1009                 pcd = get_pcd(fbi->fb.var.pixclock, f->new);
1010                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
1011                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1012                 break;
1013         }
1014         return 0;
1015 }
1016
1017 static int
1018 sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
1019                      void *data)
1020 {
1021         struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
1022         struct cpufreq_policy *policy = data;
1023
1024         switch (val) {
1025         case CPUFREQ_ADJUST:
1026         case CPUFREQ_INCOMPATIBLE:
1027                 dev_dbg(fbi->dev, "min dma period: %d ps, "
1028                         "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
1029                         policy->max);
1030                 /* todo: fill in min/max values */
1031                 break;
1032         case CPUFREQ_NOTIFY:
1033                 do {} while(0);
1034                 /* todo: panic if min/max values aren't fulfilled
1035                  * [can't really happen unless there's a bug in the
1036                  * CPU policy verififcation process *
1037                  */
1038                 break;
1039         }
1040         return 0;
1041 }
1042 #endif
1043
1044 #ifdef CONFIG_PM
1045 /*
1046  * Power management hooks.  Note that we won't be called from IRQ context,
1047  * unlike the blank functions above, so we may sleep.
1048  */
1049 static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
1050 {
1051         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1052
1053         set_ctrlr_state(fbi, C_DISABLE_PM);
1054         return 0;
1055 }
1056
1057 static int sa1100fb_resume(struct platform_device *dev)
1058 {
1059         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1060
1061         set_ctrlr_state(fbi, C_ENABLE_PM);
1062         return 0;
1063 }
1064 #else
1065 #define sa1100fb_suspend        NULL
1066 #define sa1100fb_resume         NULL
1067 #endif
1068
1069 /*
1070  * sa1100fb_map_video_memory():
1071  *      Allocates the DRAM memory for the frame buffer.  This buffer is
1072  *      remapped into a non-cached, non-buffered, memory region to
1073  *      allow palette and pixel writes to occur without flushing the
1074  *      cache.  Once this area is remapped, all virtual memory
1075  *      access to the video memory should occur at the new region.
1076  */
1077 static int __devinit sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
1078 {
1079         /*
1080          * We reserve one page for the palette, plus the size
1081          * of the framebuffer.
1082          */
1083         fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
1084         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
1085                                               &fbi->map_dma, GFP_KERNEL);
1086
1087         if (fbi->map_cpu) {
1088                 fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
1089                 fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
1090                 /*
1091                  * FIXME: this is actually the wrong thing to place in
1092                  * smem_start.  But fbdev suffers from the problem that
1093                  * it needs an API which doesn't exist (in this case,
1094                  * dma_writecombine_mmap)
1095                  */
1096                 fbi->fb.fix.smem_start = fbi->screen_dma;
1097         }
1098
1099         return fbi->map_cpu ? 0 : -ENOMEM;
1100 }
1101
1102 /* Fake monspecs to fill in fbinfo structure */
1103 static struct fb_monspecs monspecs __devinitdata = {
1104         .hfmin  = 30000,
1105         .hfmax  = 70000,
1106         .vfmin  = 50,
1107         .vfmax  = 65,
1108 };
1109
1110
1111 static struct sa1100fb_info * __devinit sa1100fb_init_fbinfo(struct device *dev)
1112 {
1113         struct sa1100fb_mach_info *inf = dev->platform_data;
1114         struct sa1100fb_info *fbi;
1115         unsigned i;
1116
1117         fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
1118                       GFP_KERNEL);
1119         if (!fbi)
1120                 return NULL;
1121
1122         memset(fbi, 0, sizeof(struct sa1100fb_info));
1123         fbi->dev = dev;
1124
1125         strcpy(fbi->fb.fix.id, SA1100_NAME);
1126
1127         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1128         fbi->fb.fix.type_aux    = 0;
1129         fbi->fb.fix.xpanstep    = 0;
1130         fbi->fb.fix.ypanstep    = 0;
1131         fbi->fb.fix.ywrapstep   = 0;
1132         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1133
1134         fbi->fb.var.nonstd      = 0;
1135         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1136         fbi->fb.var.height      = -1;
1137         fbi->fb.var.width       = -1;
1138         fbi->fb.var.accel_flags = 0;
1139         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1140
1141         fbi->fb.fbops           = &sa1100fb_ops;
1142         fbi->fb.flags           = FBINFO_DEFAULT;
1143         fbi->fb.monspecs        = monspecs;
1144         fbi->fb.pseudo_palette  = (fbi + 1);
1145
1146         fbi->rgb[RGB_4]         = &rgb_4;
1147         fbi->rgb[RGB_8]         = &rgb_8;
1148         fbi->rgb[RGB_16]        = &def_rgb_16;
1149
1150         /*
1151          * People just don't seem to get this.  We don't support
1152          * anything but correct entries now, so panic if someone
1153          * does something stupid.
1154          */
1155         if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
1156             inf->pixclock == 0)
1157                 panic("sa1100fb error: invalid LCCR3 fields set or zero "
1158                         "pixclock.");
1159
1160         fbi->max_xres                   = inf->xres;
1161         fbi->fb.var.xres                = inf->xres;
1162         fbi->fb.var.xres_virtual        = inf->xres;
1163         fbi->max_yres                   = inf->yres;
1164         fbi->fb.var.yres                = inf->yres;
1165         fbi->fb.var.yres_virtual        = inf->yres;
1166         fbi->max_bpp                    = inf->bpp;
1167         fbi->fb.var.bits_per_pixel      = inf->bpp;
1168         fbi->fb.var.pixclock            = inf->pixclock;
1169         fbi->fb.var.hsync_len           = inf->hsync_len;
1170         fbi->fb.var.left_margin         = inf->left_margin;
1171         fbi->fb.var.right_margin        = inf->right_margin;
1172         fbi->fb.var.vsync_len           = inf->vsync_len;
1173         fbi->fb.var.upper_margin        = inf->upper_margin;
1174         fbi->fb.var.lower_margin        = inf->lower_margin;
1175         fbi->fb.var.sync                = inf->sync;
1176         fbi->fb.var.grayscale           = inf->cmap_greyscale;
1177         fbi->cmap_inverse               = inf->cmap_inverse;
1178         fbi->cmap_static                = inf->cmap_static;
1179         fbi->lccr0                      = inf->lccr0;
1180         fbi->lccr3                      = inf->lccr3;
1181         fbi->state                      = C_STARTUP;
1182         fbi->task_state                 = (u_char)-1;
1183         fbi->fb.fix.smem_len            = fbi->max_xres * fbi->max_yres *
1184                                           fbi->max_bpp / 8;
1185         fbi->inf                        = inf;
1186
1187         /* Copy the RGB bitfield overrides */
1188         for (i = 0; i < NR_RGB; i++)
1189                 if (inf->rgb[i])
1190                         fbi->rgb[i] = inf->rgb[i];
1191
1192         init_waitqueue_head(&fbi->ctrlr_wait);
1193         INIT_WORK(&fbi->task, sa1100fb_task);
1194         mutex_init(&fbi->ctrlr_lock);
1195
1196         return fbi;
1197 }
1198
1199 static int __devinit sa1100fb_probe(struct platform_device *pdev)
1200 {
1201         struct sa1100fb_info *fbi;
1202         int ret, irq;
1203
1204         if (!pdev->dev.platform_data) {
1205                 dev_err(&pdev->dev, "no platform LCD data\n");
1206                 return -EINVAL;
1207         }
1208
1209         irq = platform_get_irq(pdev, 0);
1210         if (irq < 0)
1211                 return -EINVAL;
1212
1213         if (!request_mem_region(0xb0100000, 0x10000, "LCD"))
1214                 return -EBUSY;
1215
1216         fbi = sa1100fb_init_fbinfo(&pdev->dev);
1217         ret = -ENOMEM;
1218         if (!fbi)
1219                 goto failed;
1220
1221         /* Initialize video memory */
1222         ret = sa1100fb_map_video_memory(fbi);
1223         if (ret)
1224                 goto failed;
1225
1226         ret = request_irq(irq, sa1100fb_handle_irq, 0, "LCD", fbi);
1227         if (ret) {
1228                 dev_err(&pdev->dev, "request_irq failed: %d\n", ret);
1229                 goto failed;
1230         }
1231
1232 #ifdef ASSABET_PAL_VIDEO
1233         if (machine_is_assabet())
1234                 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
1235 #endif
1236
1237         /*
1238          * This makes sure that our colour bitfield
1239          * descriptors are correctly initialised.
1240          */
1241         sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
1242
1243         platform_set_drvdata(pdev, fbi);
1244
1245         ret = register_framebuffer(&fbi->fb);
1246         if (ret < 0)
1247                 goto err_free_irq;
1248
1249 #ifdef CONFIG_CPU_FREQ
1250         fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
1251         fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
1252         cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
1253         cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
1254 #endif
1255
1256         /* This driver cannot be unloaded at the moment */
1257         return 0;
1258
1259  err_free_irq:
1260         free_irq(irq, fbi);
1261  failed:
1262         platform_set_drvdata(pdev, NULL);
1263         kfree(fbi);
1264         release_mem_region(0xb0100000, 0x10000);
1265         return ret;
1266 }
1267
1268 static struct platform_driver sa1100fb_driver = {
1269         .probe          = sa1100fb_probe,
1270         .suspend        = sa1100fb_suspend,
1271         .resume         = sa1100fb_resume,
1272         .driver         = {
1273                 .name   = "sa11x0-fb",
1274                 .owner  = THIS_MODULE,
1275         },
1276 };
1277
1278 int __init sa1100fb_init(void)
1279 {
1280         if (fb_get_options("sa1100fb", NULL))
1281                 return -ENODEV;
1282
1283         return platform_driver_register(&sa1100fb_driver);
1284 }
1285
1286 int __init sa1100fb_setup(char *options)
1287 {
1288 #if 0
1289         char *this_opt;
1290
1291         if (!options || !*options)
1292                 return 0;
1293
1294         while ((this_opt = strsep(&options, ",")) != NULL) {
1295
1296                 if (!strncmp(this_opt, "bpp:", 4))
1297                         current_par.max_bpp =
1298                             simple_strtoul(this_opt + 4, NULL, 0);
1299
1300                 if (!strncmp(this_opt, "lccr0:", 6))
1301                         lcd_shadow.lccr0 =
1302                             simple_strtoul(this_opt + 6, NULL, 0);
1303                 if (!strncmp(this_opt, "lccr1:", 6)) {
1304                         lcd_shadow.lccr1 =
1305                             simple_strtoul(this_opt + 6, NULL, 0);
1306                         current_par.max_xres =
1307                             (lcd_shadow.lccr1 & 0x3ff) + 16;
1308                 }
1309                 if (!strncmp(this_opt, "lccr2:", 6)) {
1310                         lcd_shadow.lccr2 =
1311                             simple_strtoul(this_opt + 6, NULL, 0);
1312                         current_par.max_yres =
1313                             (lcd_shadow.
1314                              lccr0 & LCCR0_SDS) ? ((lcd_shadow.
1315                                                     lccr2 & 0x3ff) +
1316                                                    1) *
1317                             2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
1318                 }
1319                 if (!strncmp(this_opt, "lccr3:", 6))
1320                         lcd_shadow.lccr3 =
1321                             simple_strtoul(this_opt + 6, NULL, 0);
1322         }
1323 #endif
1324         return 0;
1325 }
1326
1327 module_init(sa1100fb_init);
1328 MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
1329 MODULE_LICENSE("GPL");