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/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 = (struct sa1100fb_info *)info;
 272         u_int val, ret = 1;
 273
 274         if (regno < fbi->palette_size) {
 275                 val = ((red >> 4) & 0xf00);
 276                 val |= ((green >> 8) & 0x0f0);
 277                 val |= ((blue >> 12) & 0x00f);
 278
 279                 if (regno == 0)
 280                         val |= palette_pbs(&fbi->fb.var);
 281
 282                 fbi->palette_cpu[regno] = val;
 283                 ret = 0;
 284         }
 285         return ret;
 286 }
 287
 288 static int
 289 sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 290                    u_int trans, struct fb_info *info)
 291 {
 292         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 293         unsigned int val;
 294         int ret = 1;
 295
 296         /*
 297          * If inverse mode was selected, invert all the colours
 298          * rather than the register number.  The register number
 299          * is what you poke into the framebuffer to produce the
 300          * colour you requested.
 301          */
 302         if (fbi->inf->cmap_inverse) {
 303                 red   = 0xffff - red;
 304                 green = 0xffff - green;
 305                 blue  = 0xffff - blue;
 306         }
 307
 308         /*
 309          * If greyscale is true, then we convert the RGB value
 310          * to greyscale no mater what visual we are using.
 311          */
 312         if (fbi->fb.var.grayscale)
 313                 red = green = blue = (19595 * red + 38470 * green +
 314                                         7471 * blue) >> 16;
 315
 316         switch (fbi->fb.fix.visual) {
 317         case FB_VISUAL_TRUECOLOR:
 318                 /*
 319                  * 12 or 16-bit True Colour.  We encode the RGB value
 320                  * according to the RGB bitfield information.
 321                  */
 322                 if (regno < 16) {
 323                         u32 *pal = fbi->fb.pseudo_palette;
 324
 325                         val  = chan_to_field(red, &fbi->fb.var.red);
 326                         val |= chan_to_field(green, &fbi->fb.var.green);
 327                         val |= chan_to_field(blue, &fbi->fb.var.blue);
 328
 329                         pal[regno] = val;
 330                         ret = 0;
 331                 }
 332                 break;
 333
 334         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 335         case FB_VISUAL_PSEUDOCOLOR:
 336                 ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
 337                 break;
 338         }
 339
 340         return ret;
 341 }
 342
 343 #ifdef CONFIG_CPU_FREQ
 344 /*
 345  *  sa1100fb_display_dma_period()
 346  *    Calculate the minimum period (in picoseconds) between two DMA
 347  *    requests for the LCD controller.  If we hit this, it means we're
 348  *    doing nothing but LCD DMA.
 349  */
 350 static inline unsigned int sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
 351 {
 352         /*
 353          * Period = pixclock * bits_per_byte * bytes_per_transfer
 354          *              / memory_bits_per_pixel;
 355          */
 356         return var->pixclock * 8 * 16 / var->bits_per_pixel;
 357 }
 358 #endif
 359
 360 /*
 361  *  sa1100fb_check_var():
 362  *    Round up in the following order: bits_per_pixel, xres,
 363  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 364  *    bitfields, horizontal timing, vertical timing.
 365  */
 366 static int
 367 sa1100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 368 {
 369         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 370         int rgbidx;
 371
 372         if (var->xres < MIN_XRES)
 373                 var->xres = MIN_XRES;
 374         if (var->yres < MIN_YRES)
 375                 var->yres = MIN_YRES;
 376         if (var->xres > fbi->inf->xres)
 377                 var->xres = fbi->inf->xres;
 378         if (var->yres > fbi->inf->yres)
 379                 var->yres = fbi->inf->yres;
 380         var->xres_virtual = max(var->xres_virtual, var->xres);
 381         var->yres_virtual = max(var->yres_virtual, var->yres);
 382
 383         dev_dbg(fbi->dev, "var->bits_per_pixel=%d\n", var->bits_per_pixel);
 384         switch (var->bits_per_pixel) {
 385         case 4:
 386                 rgbidx = RGB_4;
 387                 break;
 388         case 8:
 389                 rgbidx = RGB_8;
 390                 break;
 391         case 16:
 392                 rgbidx = RGB_16;
 393                 break;
 394         default:
 395                 return -EINVAL;
 396         }
 397
 398         /*
 399          * Copy the RGB parameters for this display
 400          * from the machine specific parameters.
 401          */
 402         var->red    = fbi->rgb[rgbidx]->red;
 403         var->green  = fbi->rgb[rgbidx]->green;
 404         var->blue   = fbi->rgb[rgbidx]->blue;
 405         var->transp = fbi->rgb[rgbidx]->transp;
 406
 407         dev_dbg(fbi->dev, "RGBT length = %d:%d:%d:%d\n",
 408                 var->red.length, var->green.length, var->blue.length,
 409                 var->transp.length);
 410
 411         dev_dbg(fbi->dev, "RGBT offset = %d:%d:%d:%d\n",
 412                 var->red.offset, var->green.offset, var->blue.offset,
 413                 var->transp.offset);
 414
 415 #ifdef CONFIG_CPU_FREQ
 416         dev_dbg(fbi->dev, "dma period = %d ps, clock = %d kHz\n",
 417                 sa1100fb_display_dma_period(var),
 418                 cpufreq_get(smp_processor_id()));
 419 #endif
 420
 421         return 0;
 422 }
 423
 424 static void sa1100fb_set_visual(struct sa1100fb_info *fbi, u32 visual)
 425 {
 426         if (fbi->inf->set_visual)
 427                 fbi->inf->set_visual(visual);
 428 }
 429
 430 /*
 431  * sa1100fb_set_par():
 432  *      Set the user defined part of the display for the specified console
 433  */
 434 static int sa1100fb_set_par(struct fb_info *info)
 435 {
 436         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 437         struct fb_var_screeninfo *var = &info->var;
 438         unsigned long palette_mem_size;
 439
 440         dev_dbg(fbi->dev, "set_par\n");
 441
 442         if (var->bits_per_pixel == 16)
 443                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 444         else if (!fbi->inf->cmap_static)
 445                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 446         else {
 447                 /*
 448                  * Some people have weird ideas about wanting static
 449                  * pseudocolor maps.  I suspect their user space
 450                  * applications are broken.
 451                  */
 452                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 453         }
 454
 455         fbi->fb.fix.line_length = var->xres_virtual *
 456                                   var->bits_per_pixel / 8;
 457         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 458
 459         palette_mem_size = fbi->palette_size * sizeof(u16);
 460
 461         dev_dbg(fbi->dev, "palette_mem_size = 0x%08lx\n", palette_mem_size);
 462
 463         fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
 464         fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
 465
 466         /*
 467          * Set (any) board control register to handle new color depth
 468          */
 469         sa1100fb_set_visual(fbi, fbi->fb.fix.visual);
 470         sa1100fb_activate_var(var, fbi);
 471
 472         return 0;
 473 }
 474
 475 #if 0
 476 static int
 477 sa1100fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
 478                   struct fb_info *info)
 479 {
 480         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 481
 482         /*
 483          * Make sure the user isn't doing something stupid.
 484          */
 485         if (!kspc && (fbi->fb.var.bits_per_pixel == 16 || fbi->inf->cmap_static))
 486                 return -EINVAL;
 487
 488         return gen_set_cmap(cmap, kspc, con, info);
 489 }
 490 #endif
 491
 492 /*
 493  * Formal definition of the VESA spec:
 494  *  On
 495  *      This refers to the state of the display when it is in full operation
 496  *  Stand-By
 497  *      This defines an optional operating state of minimal power reduction with
 498  *      the shortest recovery time
 499  *  Suspend
 500  *      This refers to a level of power management in which substantial power
 501  *      reduction is achieved by the display.  The display can have a longer
 502  *      recovery time from this state than from the Stand-by state
 503  *  Off
 504  *      This indicates that the display is consuming the lowest level of power
 505  *      and is non-operational. Recovery from this state may optionally require
 506  *      the user to manually power on the monitor
 507  *
 508  *  Now, the fbdev driver adds an additional state, (blank), where they
 509  *  turn off the video (maybe by colormap tricks), but don't mess with the
 510  *  video itself: think of it semantically between on and Stand-By.
 511  *
 512  *  So here's what we should do in our fbdev blank routine:
 513  *
 514  *      VESA_NO_BLANKING (mode 0)       Video on,  front/back light on
 515  *      VESA_VSYNC_SUSPEND (mode 1)     Video on,  front/back light off
 516  *      VESA_HSYNC_SUSPEND (mode 2)     Video on,  front/back light off
 517  *      VESA_POWERDOWN (mode 3)         Video off, front/back light off
 518  *
 519  *  This will match the matrox implementation.
 520  */
 521 /*
 522  * sa1100fb_blank():
 523  *      Blank the display by setting all palette values to zero.  Note, the
 524  *      12 and 16 bpp modes don't really use the palette, so this will not
 525  *      blank the display in all modes.
 526  */
 527 static int sa1100fb_blank(int blank, struct fb_info *info)
 528 {
 529         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 530         int i;
 531
 532         dev_dbg(fbi->dev, "sa1100fb_blank: blank=%d\n", blank);
 533
 534         switch (blank) {
 535         case FB_BLANK_POWERDOWN:
 536         case FB_BLANK_VSYNC_SUSPEND:
 537         case FB_BLANK_HSYNC_SUSPEND:
 538         case FB_BLANK_NORMAL:
 539                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 540                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 541                         for (i = 0; i < fbi->palette_size; i++)
 542                                 sa1100fb_setpalettereg(i, 0, 0, 0, 0, info);
 543                 sa1100fb_schedule_work(fbi, C_DISABLE);
 544                 break;
 545
 546         case FB_BLANK_UNBLANK:
 547                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 548                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 549                         fb_set_cmap(&fbi->fb.cmap, info);
 550                 sa1100fb_schedule_work(fbi, C_ENABLE);
 551         }
 552         return 0;
 553 }
 554
 555 static int sa1100fb_mmap(struct fb_info *info,
 556                          struct vm_area_struct *vma)
 557 {
 558         struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
 559         unsigned long start, len, off = vma->vm_pgoff << PAGE_SHIFT;
 560
 561         if (off < info->fix.smem_len) {
 562                 vma->vm_pgoff += 1; /* skip over the palette */
 563                 return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
 564                                              fbi->map_dma, fbi->map_size);
 565         }
 566
 567         start = info->fix.mmio_start;
 568         len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
 569
 570         if ((vma->vm_end - vma->vm_start + off) > len)
 571                 return -EINVAL;
 572
 573         off += start & PAGE_MASK;
 574         vma->vm_pgoff = off >> PAGE_SHIFT;
 575         vma->vm_flags |= VM_IO;
 576         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 577         return io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 578                                    vma->vm_end - vma->vm_start,
 579                                    vma->vm_page_prot);
 580 }
 581
 582 static struct fb_ops sa1100fb_ops = {
 583         .owner          = THIS_MODULE,
 584         .fb_check_var   = sa1100fb_check_var,
 585         .fb_set_par     = sa1100fb_set_par,
 586 //      .fb_set_cmap    = sa1100fb_set_cmap,
 587         .fb_setcolreg   = sa1100fb_setcolreg,
 588         .fb_fillrect    = cfb_fillrect,
 589         .fb_copyarea    = cfb_copyarea,
 590         .fb_imageblit   = cfb_imageblit,
 591         .fb_blank       = sa1100fb_blank,
 592         .fb_mmap        = sa1100fb_mmap,
 593 };
 594
 595 /*
 596  * Calculate the PCD value from the clock rate (in picoseconds).
 597  * We take account of the PPCR clock setting.
 598  */
 599 static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock)
 600 {
 601         unsigned int pcd = cpuclock / 100;
 602
 603         pcd *= pixclock;
 604         pcd /= 10000000;
 605
 606         return pcd + 1; /* make up for integer math truncations */
 607 }
 608
 609 /*
 610  * sa1100fb_activate_var():
 611  *      Configures LCD Controller based on entries in var parameter.  Settings are
 612  *      only written to the controller if changes were made.
 613  */
 614 static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
 615 {
 616         struct sa1100fb_lcd_reg new_regs;
 617         u_int half_screen_size, yres, pcd;
 618         u_long flags;
 619
 620         dev_dbg(fbi->dev, "Configuring SA1100 LCD\n");
 621
 622         dev_dbg(fbi->dev, "var: xres=%d hslen=%d lm=%d rm=%d\n",
 623                 var->xres, var->hsync_len,
 624                 var->left_margin, var->right_margin);
 625         dev_dbg(fbi->dev, "var: yres=%d vslen=%d um=%d bm=%d\n",
 626                 var->yres, var->vsync_len,
 627                 var->upper_margin, var->lower_margin);
 628
 629 #if DEBUG_VAR
 630         if (var->xres < 16        || var->xres > 1024)
 631                 dev_err(fbi->dev, "%s: invalid xres %d\n",
 632                         fbi->fb.fix.id, var->xres);
 633         if (var->hsync_len < 1    || var->hsync_len > 64)
 634                 dev_err(fbi->dev, "%s: invalid hsync_len %d\n",
 635                         fbi->fb.fix.id, var->hsync_len);
 636         if (var->left_margin < 1  || var->left_margin > 255)
 637                 dev_err(fbi->dev, "%s: invalid left_margin %d\n",
 638                         fbi->fb.fix.id, var->left_margin);
 639         if (var->right_margin < 1 || var->right_margin > 255)
 640                 dev_err(fbi->dev, "%s: invalid right_margin %d\n",
 641                         fbi->fb.fix.id, var->right_margin);
 642         if (var->yres < 1         || var->yres > 1024)
 643                 dev_err(fbi->dev, "%s: invalid yres %d\n",
 644                         fbi->fb.fix.id, var->yres);
 645         if (var->vsync_len < 1    || var->vsync_len > 64)
 646                 dev_err(fbi->dev, "%s: invalid vsync_len %d\n",
 647                         fbi->fb.fix.id, var->vsync_len);
 648         if (var->upper_margin < 0 || var->upper_margin > 255)
 649                 dev_err(fbi->dev, "%s: invalid upper_margin %d\n",
 650                         fbi->fb.fix.id, var->upper_margin);
 651         if (var->lower_margin < 0 || var->lower_margin > 255)
 652                 dev_err(fbi->dev, "%s: invalid lower_margin %d\n",
 653                         fbi->fb.fix.id, var->lower_margin);
 654 #endif
 655
 656         new_regs.lccr0 = fbi->inf->lccr0 |
 657                 LCCR0_LEN | LCCR0_LDM | LCCR0_BAM |
 658                 LCCR0_ERM | LCCR0_LtlEnd | LCCR0_DMADel(0);
 659
 660         new_regs.lccr1 =
 661                 LCCR1_DisWdth(var->xres) +
 662                 LCCR1_HorSnchWdth(var->hsync_len) +
 663                 LCCR1_BegLnDel(var->left_margin) +
 664                 LCCR1_EndLnDel(var->right_margin);
 665
 666         /*
 667          * If we have a dual scan LCD, then we need to halve
 668          * the YRES parameter.
 669          */
 670         yres = var->yres;
 671         if (fbi->inf->lccr0 & LCCR0_Dual)
 672                 yres /= 2;
 673
 674         new_regs.lccr2 =
 675                 LCCR2_DisHght(yres) +
 676                 LCCR2_VrtSnchWdth(var->vsync_len) +
 677                 LCCR2_BegFrmDel(var->upper_margin) +
 678                 LCCR2_EndFrmDel(var->lower_margin);
 679
 680         pcd = get_pcd(var->pixclock, cpufreq_get(0));
 681         new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->inf->lccr3 |
 682                 (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
 683                 (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
 684
 685         dev_dbg(fbi->dev, "nlccr0 = 0x%08lx\n", new_regs.lccr0);
 686         dev_dbg(fbi->dev, "nlccr1 = 0x%08lx\n", new_regs.lccr1);
 687         dev_dbg(fbi->dev, "nlccr2 = 0x%08lx\n", new_regs.lccr2);
 688         dev_dbg(fbi->dev, "nlccr3 = 0x%08lx\n", new_regs.lccr3);
 689
 690         half_screen_size = var->bits_per_pixel;
 691         half_screen_size = half_screen_size * var->xres * var->yres / 16;
 692
 693         /* Update shadow copy atomically */
 694         local_irq_save(flags);
 695         fbi->dbar1 = fbi->palette_dma;
 696         fbi->dbar2 = fbi->screen_dma + half_screen_size;
 697
 698         fbi->reg_lccr0 = new_regs.lccr0;
 699         fbi->reg_lccr1 = new_regs.lccr1;
 700         fbi->reg_lccr2 = new_regs.lccr2;
 701         fbi->reg_lccr3 = new_regs.lccr3;
 702         local_irq_restore(flags);
 703
 704         /*
 705          * Only update the registers if the controller is enabled
 706          * and something has changed.
 707          */
 708         if (readl_relaxed(fbi->base + LCCR0) != fbi->reg_lccr0 ||
 709             readl_relaxed(fbi->base + LCCR1) != fbi->reg_lccr1 ||
 710             readl_relaxed(fbi->base + LCCR2) != fbi->reg_lccr2 ||
 711             readl_relaxed(fbi->base + LCCR3) != fbi->reg_lccr3 ||
 712             readl_relaxed(fbi->base + DBAR1) != fbi->dbar1 ||
 713             readl_relaxed(fbi->base + DBAR2) != fbi->dbar2)
 714                 sa1100fb_schedule_work(fbi, C_REENABLE);
 715
 716         return 0;
 717 }
 718
 719 /*
 720  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
 721  * Do not call them directly; set_ctrlr_state does the correct serialisation
 722  * to ensure that things happen in the right way 100% of time time.
 723  *      -- rmk
 724  */
 725 static inline void __sa1100fb_backlight_power(struct sa1100fb_info *fbi, int on)
 726 {
 727         dev_dbg(fbi->dev, "backlight o%s\n", on ? "n" : "ff");
 728
 729         if (fbi->inf->backlight_power)
 730                 fbi->inf->backlight_power(on);
 731 }
 732
 733 static inline void __sa1100fb_lcd_power(struct sa1100fb_info *fbi, int on)
 734 {
 735         dev_dbg(fbi->dev, "LCD power o%s\n", on ? "n" : "ff");
 736
 737         if (fbi->inf->lcd_power)
 738                 fbi->inf->lcd_power(on);
 739 }
 740
 741 static void sa1100fb_setup_gpio(struct sa1100fb_info *fbi)
 742 {
 743         u_int mask = 0;
 744
 745         /*
 746          * Enable GPIO<9:2> for LCD use if:
 747          *  1. Active display, or
 748          *  2. Color Dual Passive display
 749          *
 750          * see table 11.8 on page 11-27 in the SA1100 manual
 751          *   -- Erik.
 752          *
 753          * SA1110 spec update nr. 25 says we can and should
 754          * clear LDD15 to 12 for 4 or 8bpp modes with active
 755          * panels.
 756          */
 757         if ((fbi->reg_lccr0 & LCCR0_CMS) == LCCR0_Color &&
 758             (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) != 0) {
 759                 mask = GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9  | GPIO_LDD8;
 760
 761                 if (fbi->fb.var.bits_per_pixel > 8 ||
 762                     (fbi->reg_lccr0 & (LCCR0_Dual|LCCR0_Act)) == LCCR0_Dual)
 763                         mask |= GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12;
 764
 765         }
 766
 767         if (mask) {
 768                 unsigned long flags;
 769
 770                 /*
 771                  * SA-1100 requires the GPIO direction register set
 772                  * appropriately for the alternate function.  Hence
 773                  * we set it here via bitmask rather than excessive
 774                  * fiddling via the GPIO subsystem - and even then
 775                  * we'll still have to deal with GAFR.
 776                  */
 777                 local_irq_save(flags);
 778                 GPDR |= mask;
 779                 GAFR |= mask;
 780                 local_irq_restore(flags);
 781         }
 782 }
 783
 784 static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
 785 {
 786         dev_dbg(fbi->dev, "Enabling LCD controller\n");
 787
 788         /*
 789          * Make sure the mode bits are present in the first palette entry
 790          */
 791         fbi->palette_cpu[0] &= 0xcfff;
 792         fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var);
 793
 794         /* Sequence from 11.7.10 */
 795         writel_relaxed(fbi->reg_lccr3, fbi->base + LCCR3);
 796         writel_relaxed(fbi->reg_lccr2, fbi->base + LCCR2);
 797         writel_relaxed(fbi->reg_lccr1, fbi->base + LCCR1);
 798         writel_relaxed(fbi->reg_lccr0 & ~LCCR0_LEN, fbi->base + LCCR0);
 799         writel_relaxed(fbi->dbar1, fbi->base + DBAR1);
 800         writel_relaxed(fbi->dbar2, fbi->base + DBAR2);
 801         writel_relaxed(fbi->reg_lccr0 | LCCR0_LEN, fbi->base + LCCR0);
 802
 803         if (machine_is_shannon())
 804                 gpio_set_value(SHANNON_GPIO_DISP_EN, 1);
 805
 806         dev_dbg(fbi->dev, "DBAR1: 0x%08x\n", readl_relaxed(fbi->base + DBAR1));
 807         dev_dbg(fbi->dev, "DBAR2: 0x%08x\n", readl_relaxed(fbi->base + DBAR2));
 808         dev_dbg(fbi->dev, "LCCR0: 0x%08x\n", readl_relaxed(fbi->base + LCCR0));
 809         dev_dbg(fbi->dev, "LCCR1: 0x%08x\n", readl_relaxed(fbi->base + LCCR1));
 810         dev_dbg(fbi->dev, "LCCR2: 0x%08x\n", readl_relaxed(fbi->base + LCCR2));
 811         dev_dbg(fbi->dev, "LCCR3: 0x%08x\n", readl_relaxed(fbi->base + LCCR3));
 812 }
 813
 814 static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
 815 {
 816         DECLARE_WAITQUEUE(wait, current);
 817         u32 lccr0;
 818
 819         dev_dbg(fbi->dev, "Disabling LCD controller\n");
 820
 821         if (machine_is_shannon())
 822                 gpio_set_value(SHANNON_GPIO_DISP_EN, 0);
 823
 824         set_current_state(TASK_UNINTERRUPTIBLE);
 825         add_wait_queue(&fbi->ctrlr_wait, &wait);
 826
 827         /* Clear LCD Status Register */
 828         writel_relaxed(~0, fbi->base + LCSR);
 829
 830         lccr0 = readl_relaxed(fbi->base + LCCR0);
 831         lccr0 &= ~LCCR0_LDM;    /* Enable LCD Disable Done Interrupt */
 832         writel_relaxed(lccr0, fbi->base + LCCR0);
 833         lccr0 &= ~LCCR0_LEN;    /* Disable LCD Controller */
 834         writel_relaxed(lccr0, fbi->base + LCCR0);
 835
 836         schedule_timeout(20 * HZ / 1000);
 837         remove_wait_queue(&fbi->ctrlr_wait, &wait);
 838 }
 839
 840 /*
 841  *  sa1100fb_handle_irq: Handle 'LCD DONE' interrupts.
 842  */
 843 static irqreturn_t sa1100fb_handle_irq(int irq, void *dev_id)
 844 {
 845         struct sa1100fb_info *fbi = dev_id;
 846         unsigned int lcsr = readl_relaxed(fbi->base + LCSR);
 847
 848         if (lcsr & LCSR_LDD) {
 849                 u32 lccr0 = readl_relaxed(fbi->base + LCCR0) | LCCR0_LDM;
 850                 writel_relaxed(lccr0, fbi->base + LCCR0);
 851                 wake_up(&fbi->ctrlr_wait);
 852         }
 853
 854         writel_relaxed(lcsr, fbi->base + LCSR);
 855         return IRQ_HANDLED;
 856 }
 857
 858 /*
 859  * This function must be called from task context only, since it will
 860  * sleep when disabling the LCD controller, or if we get two contending
 861  * processes trying to alter state.
 862  */
 863 static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 864 {
 865         u_int old_state;
 866
 867         mutex_lock(&fbi->ctrlr_lock);
 868
 869         old_state = fbi->state;
 870
 871         /*
 872          * Hack around fbcon initialisation.
 873          */
 874         if (old_state == C_STARTUP && state == C_REENABLE)
 875                 state = C_ENABLE;
 876
 877         switch (state) {
 878         case C_DISABLE_CLKCHANGE:
 879                 /*
 880                  * Disable controller for clock change.  If the
 881                  * controller is already disabled, then do nothing.
 882                  */
 883                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
 884                         fbi->state = state;
 885                         sa1100fb_disable_controller(fbi);
 886                 }
 887                 break;
 888
 889         case C_DISABLE_PM:
 890         case C_DISABLE:
 891                 /*
 892                  * Disable controller
 893                  */
 894                 if (old_state != C_DISABLE) {
 895                         fbi->state = state;
 896
 897                         __sa1100fb_backlight_power(fbi, 0);
 898                         if (old_state != C_DISABLE_CLKCHANGE)
 899                                 sa1100fb_disable_controller(fbi);
 900                         __sa1100fb_lcd_power(fbi, 0);
 901                 }
 902                 break;
 903
 904         case C_ENABLE_CLKCHANGE:
 905                 /*
 906                  * Enable the controller after clock change.  Only
 907                  * do this if we were disabled for the clock change.
 908                  */
 909                 if (old_state == C_DISABLE_CLKCHANGE) {
 910                         fbi->state = C_ENABLE;
 911                         sa1100fb_enable_controller(fbi);
 912                 }
 913                 break;
 914
 915         case C_REENABLE:
 916                 /*
 917                  * Re-enable the controller only if it was already
 918                  * enabled.  This is so we reprogram the control
 919                  * registers.
 920                  */
 921                 if (old_state == C_ENABLE) {
 922                         sa1100fb_disable_controller(fbi);
 923                         sa1100fb_setup_gpio(fbi);
 924                         sa1100fb_enable_controller(fbi);
 925                 }
 926                 break;
 927
 928         case C_ENABLE_PM:
 929                 /*
 930                  * Re-enable the controller after PM.  This is not
 931                  * perfect - think about the case where we were doing
 932                  * a clock change, and we suspended half-way through.
 933                  */
 934                 if (old_state != C_DISABLE_PM)
 935                         break;
 936                 /* fall through */
 937
 938         case C_ENABLE:
 939                 /*
 940                  * Power up the LCD screen, enable controller, and
 941                  * turn on the backlight.
 942                  */
 943                 if (old_state != C_ENABLE) {
 944                         fbi->state = C_ENABLE;
 945                         sa1100fb_setup_gpio(fbi);
 946                         __sa1100fb_lcd_power(fbi, 1);
 947                         sa1100fb_enable_controller(fbi);
 948                         __sa1100fb_backlight_power(fbi, 1);
 949                 }
 950                 break;
 951         }
 952         mutex_unlock(&fbi->ctrlr_lock);
 953 }
 954
 955 /*
 956  * Our LCD controller task (which is called when we blank or unblank)
 957  * via keventd.
 958  */
 959 static void sa1100fb_task(struct work_struct *w)
 960 {
 961         struct sa1100fb_info *fbi = container_of(w, struct sa1100fb_info, task);
 962         u_int state = xchg(&fbi->task_state, -1);
 963
 964         set_ctrlr_state(fbi, state);
 965 }
 966
 967 #ifdef CONFIG_CPU_FREQ
 968 /*
 969  * Calculate the minimum DMA period over all displays that we own.
 970  * This, together with the SDRAM bandwidth defines the slowest CPU
 971  * frequency that can be selected.
 972  */
 973 static unsigned int sa1100fb_min_dma_period(struct sa1100fb_info *fbi)
 974 {
 975 #if 0
 976         unsigned int min_period = (unsigned int)-1;
 977         int i;
 978
 979         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 980                 struct display *disp = &fb_display[i];
 981                 unsigned int period;
 982
 983                 /*
 984                  * Do we own this display?
 985                  */
 986                 if (disp->fb_info != &fbi->fb)
 987                         continue;
 988
 989                 /*
 990                  * Ok, calculate its DMA period
 991                  */
 992                 period = sa1100fb_display_dma_period(&disp->var);
 993                 if (period < min_period)
 994                         min_period = period;
 995         }
 996
 997         return min_period;
 998 #else
 999         /*
1000          * FIXME: we need to verify _all_ consoles.
1001          */
1002         return sa1100fb_display_dma_period(&fbi->fb.var);
1003 #endif
1004 }
1005
1006 /*
1007  * CPU clock speed change handler.  We need to adjust the LCD timing
1008  * parameters when the CPU clock is adjusted by the power management
1009  * subsystem.
1010  */
1011 static int
1012 sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val,
1013                          void *data)
1014 {
1015         struct sa1100fb_info *fbi = TO_INF(nb, freq_transition);
1016         struct cpufreq_freqs *f = data;
1017         u_int pcd;
1018
1019         switch (val) {
1020         case CPUFREQ_PRECHANGE:
1021                 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1022                 break;
1023
1024         case CPUFREQ_POSTCHANGE:
1025                 pcd = get_pcd(fbi->fb.var.pixclock, f->new);
1026                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
1027                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1028                 break;
1029         }
1030         return 0;
1031 }
1032
1033 static int
1034 sa1100fb_freq_policy(struct notifier_block *nb, unsigned long val,
1035                      void *data)
1036 {
1037         struct sa1100fb_info *fbi = TO_INF(nb, freq_policy);
1038         struct cpufreq_policy *policy = data;
1039
1040         switch (val) {
1041         case CPUFREQ_ADJUST:
1042         case CPUFREQ_INCOMPATIBLE:
1043                 dev_dbg(fbi->dev, "min dma period: %d ps, "
1044                         "new clock %d kHz\n", sa1100fb_min_dma_period(fbi),
1045                         policy->max);
1046                 /* todo: fill in min/max values */
1047                 break;
1048         case CPUFREQ_NOTIFY:
1049                 do {} while(0);
1050                 /* todo: panic if min/max values aren't fulfilled
1051                  * [can't really happen unless there's a bug in the
1052                  * CPU policy verififcation process *
1053                  */
1054                 break;
1055         }
1056         return 0;
1057 }
1058 #endif
1059
1060 #ifdef CONFIG_PM
1061 /*
1062  * Power management hooks.  Note that we won't be called from IRQ context,
1063  * unlike the blank functions above, so we may sleep.
1064  */
1065 static int sa1100fb_suspend(struct platform_device *dev, pm_message_t state)
1066 {
1067         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1068
1069         set_ctrlr_state(fbi, C_DISABLE_PM);
1070         return 0;
1071 }
1072
1073 static int sa1100fb_resume(struct platform_device *dev)
1074 {
1075         struct sa1100fb_info *fbi = platform_get_drvdata(dev);
1076
1077         set_ctrlr_state(fbi, C_ENABLE_PM);
1078         return 0;
1079 }
1080 #else
1081 #define sa1100fb_suspend        NULL
1082 #define sa1100fb_resume         NULL
1083 #endif
1084
1085 /*
1086  * sa1100fb_map_video_memory():
1087  *      Allocates the DRAM memory for the frame buffer.  This buffer is
1088  *      remapped into a non-cached, non-buffered, memory region to
1089  *      allow palette and pixel writes to occur without flushing the
1090  *      cache.  Once this area is remapped, all virtual memory
1091  *      access to the video memory should occur at the new region.
1092  */
1093 static int __devinit sa1100fb_map_video_memory(struct sa1100fb_info *fbi)
1094 {
1095         /*
1096          * We reserve one page for the palette, plus the size
1097          * of the framebuffer.
1098          */
1099         fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
1100         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
1101                                               &fbi->map_dma, GFP_KERNEL);
1102
1103         if (fbi->map_cpu) {
1104                 fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
1105                 fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
1106                 /*
1107                  * FIXME: this is actually the wrong thing to place in
1108                  * smem_start.  But fbdev suffers from the problem that
1109                  * it needs an API which doesn't exist (in this case,
1110                  * dma_writecombine_mmap)
1111                  */
1112                 fbi->fb.fix.smem_start = fbi->screen_dma;
1113         }
1114
1115         return fbi->map_cpu ? 0 : -ENOMEM;
1116 }
1117
1118 /* Fake monspecs to fill in fbinfo structure */
1119 static struct fb_monspecs monspecs __devinitdata = {
1120         .hfmin  = 30000,
1121         .hfmax  = 70000,
1122         .vfmin  = 50,
1123         .vfmax  = 65,
1124 };
1125
1126
1127 static struct sa1100fb_info * __devinit sa1100fb_init_fbinfo(struct device *dev)
1128 {
1129         struct sa1100fb_mach_info *inf = dev->platform_data;
1130         struct sa1100fb_info *fbi;
1131         unsigned i;
1132
1133         fbi = kmalloc(sizeof(struct sa1100fb_info) + sizeof(u32) * 16,
1134                       GFP_KERNEL);
1135         if (!fbi)
1136                 return NULL;
1137
1138         memset(fbi, 0, sizeof(struct sa1100fb_info));
1139         fbi->dev = dev;
1140
1141         strcpy(fbi->fb.fix.id, SA1100_NAME);
1142
1143         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1144         fbi->fb.fix.type_aux    = 0;
1145         fbi->fb.fix.xpanstep    = 0;
1146         fbi->fb.fix.ypanstep    = 0;
1147         fbi->fb.fix.ywrapstep   = 0;
1148         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1149
1150         fbi->fb.var.nonstd      = 0;
1151         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1152         fbi->fb.var.height      = -1;
1153         fbi->fb.var.width       = -1;
1154         fbi->fb.var.accel_flags = 0;
1155         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1156
1157         fbi->fb.fbops           = &sa1100fb_ops;
1158         fbi->fb.flags           = FBINFO_DEFAULT;
1159         fbi->fb.monspecs        = monspecs;
1160         fbi->fb.pseudo_palette  = (fbi + 1);
1161
1162         fbi->rgb[RGB_4]         = &rgb_4;
1163         fbi->rgb[RGB_8]         = &rgb_8;
1164         fbi->rgb[RGB_16]        = &def_rgb_16;
1165
1166         /*
1167          * People just don't seem to get this.  We don't support
1168          * anything but correct entries now, so panic if someone
1169          * does something stupid.
1170          */
1171         if (inf->lccr3 & (LCCR3_VrtSnchL|LCCR3_HorSnchL|0xff) ||
1172             inf->pixclock == 0)
1173                 panic("sa1100fb error: invalid LCCR3 fields set or zero "
1174                         "pixclock.");
1175
1176         fbi->fb.var.xres                = inf->xres;
1177         fbi->fb.var.xres_virtual        = inf->xres;
1178         fbi->fb.var.yres                = inf->yres;
1179         fbi->fb.var.yres_virtual        = inf->yres;
1180         fbi->fb.var.bits_per_pixel      = inf->bpp;
1181         fbi->fb.var.pixclock            = inf->pixclock;
1182         fbi->fb.var.hsync_len           = inf->hsync_len;
1183         fbi->fb.var.left_margin         = inf->left_margin;
1184         fbi->fb.var.right_margin        = inf->right_margin;
1185         fbi->fb.var.vsync_len           = inf->vsync_len;
1186         fbi->fb.var.upper_margin        = inf->upper_margin;
1187         fbi->fb.var.lower_margin        = inf->lower_margin;
1188         fbi->fb.var.sync                = inf->sync;
1189         fbi->fb.var.grayscale           = inf->cmap_greyscale;
1190         fbi->state                      = C_STARTUP;
1191         fbi->task_state                 = (u_char)-1;
1192         fbi->fb.fix.smem_len            = inf->xres * inf->yres *
1193                                           inf->bpp / 8;
1194         fbi->inf                        = inf;
1195
1196         /* Copy the RGB bitfield overrides */
1197         for (i = 0; i < NR_RGB; i++)
1198                 if (inf->rgb[i])
1199                         fbi->rgb[i] = inf->rgb[i];
1200
1201         init_waitqueue_head(&fbi->ctrlr_wait);
1202         INIT_WORK(&fbi->task, sa1100fb_task);
1203         mutex_init(&fbi->ctrlr_lock);
1204
1205         return fbi;
1206 }
1207
1208 static int __devinit sa1100fb_probe(struct platform_device *pdev)
1209 {
1210         struct sa1100fb_info *fbi;
1211         struct resource *res;
1212         int ret, irq;
1213
1214         if (!pdev->dev.platform_data) {
1215                 dev_err(&pdev->dev, "no platform LCD data\n");
1216                 return -EINVAL;
1217         }
1218
1219         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1220         irq = platform_get_irq(pdev, 0);
1221         if (irq < 0 || !res)
1222                 return -EINVAL;
1223
1224         if (!request_mem_region(res->start, resource_size(res), "LCD"))
1225                 return -EBUSY;
1226
1227         fbi = sa1100fb_init_fbinfo(&pdev->dev);
1228         ret = -ENOMEM;
1229         if (!fbi)
1230                 goto failed;
1231
1232         fbi->base = ioremap(res->start, resource_size(res));
1233         if (!fbi->base)
1234                 goto failed;
1235
1236         /* Initialize video memory */
1237         ret = sa1100fb_map_video_memory(fbi);
1238         if (ret)
1239                 goto failed;
1240
1241         ret = request_irq(irq, sa1100fb_handle_irq, 0, "LCD", fbi);
1242         if (ret) {
1243                 dev_err(&pdev->dev, "request_irq failed: %d\n", ret);
1244                 goto failed;
1245         }
1246
1247         if (machine_is_shannon()) {
1248                 ret = gpio_request_one(SHANNON_GPIO_DISP_EN,
1249                         GPIOF_OUT_INIT_LOW, "display enable");
1250                 if (ret)
1251                         goto err_free_irq;
1252         }
1253
1254         /*
1255          * This makes sure that our colour bitfield
1256          * descriptors are correctly initialised.
1257          */
1258         sa1100fb_check_var(&fbi->fb.var, &fbi->fb);
1259
1260         platform_set_drvdata(pdev, fbi);
1261
1262         ret = register_framebuffer(&fbi->fb);
1263         if (ret < 0)
1264                 goto err_reg_fb;
1265
1266 #ifdef CONFIG_CPU_FREQ
1267         fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
1268         fbi->freq_policy.notifier_call = sa1100fb_freq_policy;
1269         cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
1270         cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
1271 #endif
1272
1273         /* This driver cannot be unloaded at the moment */
1274         return 0;
1275
1276  err_reg_fb:
1277         if (machine_is_shannon())
1278                 gpio_free(SHANNON_GPIO_DISP_EN);
1279  err_free_irq:
1280         free_irq(irq, fbi);
1281  failed:
1282         if (fbi)
1283                 iounmap(fbi->base);
1284         platform_set_drvdata(pdev, NULL);
1285         kfree(fbi);
1286         release_mem_region(res->start, resource_size(res));
1287         return ret;
1288 }
1289
1290 static struct platform_driver sa1100fb_driver = {
1291         .probe          = sa1100fb_probe,
1292         .suspend        = sa1100fb_suspend,
1293         .resume         = sa1100fb_resume,
1294         .driver         = {
1295                 .name   = "sa11x0-fb",
1296                 .owner  = THIS_MODULE,
1297         },
1298 };
1299
1300 int __init sa1100fb_init(void)
1301 {
1302         if (fb_get_options("sa1100fb", NULL))
1303                 return -ENODEV;
1304
1305         return platform_driver_register(&sa1100fb_driver);
1306 }
1307
1308 int __init sa1100fb_setup(char *options)
1309 {
1310 #if 0
1311         char *this_opt;
1312
1313         if (!options || !*options)
1314                 return 0;
1315
1316         while ((this_opt = strsep(&options, ",")) != NULL) {
1317
1318                 if (!strncmp(this_opt, "bpp:", 4))
1319                         current_par.max_bpp =
1320                             simple_strtoul(this_opt + 4, NULL, 0);
1321
1322                 if (!strncmp(this_opt, "lccr0:", 6))
1323                         lcd_shadow.lccr0 =
1324                             simple_strtoul(this_opt + 6, NULL, 0);
1325                 if (!strncmp(this_opt, "lccr1:", 6)) {
1326                         lcd_shadow.lccr1 =
1327                             simple_strtoul(this_opt + 6, NULL, 0);
1328                         current_par.max_xres =
1329                             (lcd_shadow.lccr1 & 0x3ff) + 16;
1330                 }
1331                 if (!strncmp(this_opt, "lccr2:", 6)) {
1332                         lcd_shadow.lccr2 =
1333                             simple_strtoul(this_opt + 6, NULL, 0);
1334                         current_par.max_yres =
1335                             (lcd_shadow.
1336                              lccr0 & LCCR0_SDS) ? ((lcd_shadow.
1337                                                     lccr2 & 0x3ff) +
1338                                                    1) *
1339                             2 : ((lcd_shadow.lccr2 & 0x3ff) + 1);
1340                 }
1341                 if (!strncmp(this_opt, "lccr3:", 6))
1342                         lcd_shadow.lccr3 =
1343                             simple_strtoul(this_opt + 6, NULL, 0);
1344         }
1345 #endif
1346         return 0;
1347 }
1348
1349 module_init(sa1100fb_init);
1350 MODULE_DESCRIPTION("StrongARM-1100/1110 framebuffer driver");
1351 MODULE_LICENSE("GPL");