drivers/video/pxafb.c

   1 /*
   2  *  linux/drivers/video/pxafb.c
   3  *
   4  *  Copyright (C) 1999 Eric A. Thomas.
   5  *  Copyright (C) 2004 Jean-Frederic Clere.
   6  *  Copyright (C) 2004 Ian Campbell.
   7  *  Copyright (C) 2004 Jeff Lackey.
   8  *   Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas
   9  *  which in turn is
  10  *   Based on acornfb.c Copyright (C) Russell King.
  11  *
  12  * This file is subject to the terms and conditions of the GNU General Public
  13  * License.  See the file COPYING in the main directory of this archive for
  14  * more details.
  15  *
  16  *              Intel PXA250/210 LCD Controller Frame Buffer Driver
  17  *
  18  * Please direct your questions and comments on this driver to the following
  19  * email address:
  20  *
  21  *      linux-arm-kernel@lists.arm.linux.org.uk
  22  *
  23  * Add support for overlay1 and overlay2 based on pxafb_overlay.c:
  24  *
  25  *   Copyright (C) 2004, Intel Corporation
  26  *
  27  *     2003/08/27: <yu.tang@intel.com>
  28  *     2004/03/10: <stanley.cai@intel.com>
  29  *     2004/10/28: <yan.yin@intel.com>
  30  *
  31  *   Copyright (C) 2006-2008 Marvell International Ltd.
  32  *   All Rights Reserved
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/kernel.h>
  38 #include <linux/sched.h>
  39 #include <linux/errno.h>
  40 #include <linux/string.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/slab.h>
  43 #include <linux/mm.h>
  44 #include <linux/fb.h>
  45 #include <linux/delay.h>
  46 #include <linux/init.h>
  47 #include <linux/ioport.h>
  48 #include <linux/cpufreq.h>
  49 #include <linux/platform_device.h>
  50 #include <linux/dma-mapping.h>
  51 #include <linux/clk.h>
  52 #include <linux/err.h>
  53 #include <linux/completion.h>
  54 #include <linux/mutex.h>
  55 #include <linux/kthread.h>
  56 #include <linux/freezer.h>
  57
  58 #include <mach/hardware.h>
  59 #include <asm/io.h>
  60 #include <asm/irq.h>
  61 #include <asm/div64.h>
  62 #include <mach/bitfield.h>
  63 #include <mach/pxafb.h>
  64
  65 /*
  66  * Complain if VAR is out of range.
  67  */
  68 #define DEBUG_VAR 1
  69
  70 #include "pxafb.h"
  71
  72 /* Bits which should not be set in machine configuration structures */
  73 #define LCCR0_INVALID_CONFIG_MASK       (LCCR0_OUM | LCCR0_BM | LCCR0_QDM |\
  74                                          LCCR0_DIS | LCCR0_EFM | LCCR0_IUM |\
  75                                          LCCR0_SFM | LCCR0_LDM | LCCR0_ENB)
  76
  77 #define LCCR3_INVALID_CONFIG_MASK       (LCCR3_HSP | LCCR3_VSP |\
  78                                          LCCR3_PCD | LCCR3_BPP(0xf))
  79
  80 static int pxafb_activate_var(struct fb_var_screeninfo *var,
  81                                 struct pxafb_info *);
  82 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state);
  83 static void setup_base_frame(struct pxafb_info *fbi, int branch);
  84 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
  85                            unsigned long offset, size_t size);
  86
  87 static unsigned long video_mem_size = 0;
  88
  89 static inline unsigned long
  90 lcd_readl(struct pxafb_info *fbi, unsigned int off)
  91 {
  92         return __raw_readl(fbi->mmio_base + off);
  93 }
  94
  95 static inline void
  96 lcd_writel(struct pxafb_info *fbi, unsigned int off, unsigned long val)
  97 {
  98         __raw_writel(val, fbi->mmio_base + off);
  99 }
 100
 101 static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state)
 102 {
 103         unsigned long flags;
 104
 105         local_irq_save(flags);
 106         /*
 107          * We need to handle two requests being made at the same time.
 108          * There are two important cases:
 109          *  1. When we are changing VT (C_REENABLE) while unblanking
 110          *     (C_ENABLE) We must perform the unblanking, which will
 111          *     do our REENABLE for us.
 112          *  2. When we are blanking, but immediately unblank before
 113          *     we have blanked.  We do the "REENABLE" thing here as
 114          *     well, just to be sure.
 115          */
 116         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
 117                 state = (u_int) -1;
 118         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
 119                 state = C_REENABLE;
 120
 121         if (state != (u_int)-1) {
 122                 fbi->task_state = state;
 123                 schedule_work(&fbi->task);
 124         }
 125         local_irq_restore(flags);
 126 }
 127
 128 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 129 {
 130         chan &= 0xffff;
 131         chan >>= 16 - bf->length;
 132         return chan << bf->offset;
 133 }
 134
 135 static int
 136 pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
 137                        u_int trans, struct fb_info *info)
 138 {
 139         struct pxafb_info *fbi = (struct pxafb_info *)info;
 140         u_int val;
 141
 142         if (regno >= fbi->palette_size)
 143                 return 1;
 144
 145         if (fbi->fb.var.grayscale) {
 146                 fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff);
 147                 return 0;
 148         }
 149
 150         switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) {
 151         case LCCR4_PAL_FOR_0:
 152                 val  = ((red   >>  0) & 0xf800);
 153                 val |= ((green >>  5) & 0x07e0);
 154                 val |= ((blue  >> 11) & 0x001f);
 155                 fbi->palette_cpu[regno] = val;
 156                 break;
 157         case LCCR4_PAL_FOR_1:
 158                 val  = ((red   << 8) & 0x00f80000);
 159                 val |= ((green >> 0) & 0x0000fc00);
 160                 val |= ((blue  >> 8) & 0x000000f8);
 161                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 162                 break;
 163         case LCCR4_PAL_FOR_2:
 164                 val  = ((red   << 8) & 0x00fc0000);
 165                 val |= ((green >> 0) & 0x0000fc00);
 166                 val |= ((blue  >> 8) & 0x000000fc);
 167                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 168                 break;
 169         case LCCR4_PAL_FOR_3:
 170                 val  = ((red   << 8) & 0x00ff0000);
 171                 val |= ((green >> 0) & 0x0000ff00);
 172                 val |= ((blue  >> 8) & 0x000000ff);
 173                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 174                 break;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static int
 181 pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 182                    u_int trans, struct fb_info *info)
 183 {
 184         struct pxafb_info *fbi = (struct pxafb_info *)info;
 185         unsigned int val;
 186         int ret = 1;
 187
 188         /*
 189          * If inverse mode was selected, invert all the colours
 190          * rather than the register number.  The register number
 191          * is what you poke into the framebuffer to produce the
 192          * colour you requested.
 193          */
 194         if (fbi->cmap_inverse) {
 195                 red   = 0xffff - red;
 196                 green = 0xffff - green;
 197                 blue  = 0xffff - blue;
 198         }
 199
 200         /*
 201          * If greyscale is true, then we convert the RGB value
 202          * to greyscale no matter what visual we are using.
 203          */
 204         if (fbi->fb.var.grayscale)
 205                 red = green = blue = (19595 * red + 38470 * green +
 206                                         7471 * blue) >> 16;
 207
 208         switch (fbi->fb.fix.visual) {
 209         case FB_VISUAL_TRUECOLOR:
 210                 /*
 211                  * 16-bit True Colour.  We encode the RGB value
 212                  * according to the RGB bitfield information.
 213                  */
 214                 if (regno < 16) {
 215                         u32 *pal = fbi->fb.pseudo_palette;
 216
 217                         val  = chan_to_field(red, &fbi->fb.var.red);
 218                         val |= chan_to_field(green, &fbi->fb.var.green);
 219                         val |= chan_to_field(blue, &fbi->fb.var.blue);
 220
 221                         pal[regno] = val;
 222                         ret = 0;
 223                 }
 224                 break;
 225
 226         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 227         case FB_VISUAL_PSEUDOCOLOR:
 228                 ret = pxafb_setpalettereg(regno, red, green, blue, trans, info);
 229                 break;
 230         }
 231
 232         return ret;
 233 }
 234
 235 /* calculate pixel depth, transparency bit included, >=16bpp formats _only_ */
 236 static inline int var_to_depth(struct fb_var_screeninfo *var)
 237 {
 238         return var->red.length + var->green.length +
 239                 var->blue.length + var->transp.length;
 240 }
 241
 242 /* calculate 4-bit BPP value for LCCR3 and OVLxC1 */
 243 static int pxafb_var_to_bpp(struct fb_var_screeninfo *var)
 244 {
 245         int bpp = -EINVAL;
 246
 247         switch (var->bits_per_pixel) {
 248         case 1:  bpp = 0; break;
 249         case 2:  bpp = 1; break;
 250         case 4:  bpp = 2; break;
 251         case 8:  bpp = 3; break;
 252         case 16: bpp = 4; break;
 253         case 24:
 254                 switch (var_to_depth(var)) {
 255                 case 18: bpp = 6; break; /* 18-bits/pixel packed */
 256                 case 19: bpp = 8; break; /* 19-bits/pixel packed */
 257                 case 24: bpp = 9; break;
 258                 }
 259                 break;
 260         case 32:
 261                 switch (var_to_depth(var)) {
 262                 case 18: bpp = 5; break; /* 18-bits/pixel unpacked */
 263                 case 19: bpp = 7; break; /* 19-bits/pixel unpacked */
 264                 case 25: bpp = 10; break;
 265                 }
 266                 break;
 267         }
 268         return bpp;
 269 }
 270
 271 /*
 272  *  pxafb_var_to_lccr3():
 273  *    Convert a bits per pixel value to the correct bit pattern for LCCR3
 274  *
 275  *  NOTE: for PXA27x with overlays support, the LCCR3_PDFOR_x bits have an
 276  *  implication of the acutal use of transparency bit,  which we handle it
 277  *  here separatedly. See PXA27x Developer's Manual, Section <<7.4.6 Pixel
 278  *  Formats>> for the valid combination of PDFOR, PAL_FOR for various BPP.
 279  *
 280  *  Transparency for palette pixel formats is not supported at the moment.
 281  */
 282 static uint32_t pxafb_var_to_lccr3(struct fb_var_screeninfo *var)
 283 {
 284         int bpp = pxafb_var_to_bpp(var);
 285         uint32_t lccr3;
 286
 287         if (bpp < 0)
 288                 return 0;
 289
 290         lccr3 = LCCR3_BPP(bpp);
 291
 292         switch (var_to_depth(var)) {
 293         case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break;
 294         case 18: lccr3 |= LCCR3_PDFOR_3; break;
 295         case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3;
 296                  break;
 297         case 19:
 298         case 25: lccr3 |= LCCR3_PDFOR_0; break;
 299         }
 300         return lccr3;
 301 }
 302
 303 #define SET_PIXFMT(v, r, g, b, t)                               \
 304 ({                                                              \
 305         (v)->transp.offset = (t) ? (r) + (g) + (b) : 0;         \
 306         (v)->transp.length = (t) ? (t) : 0;                     \
 307         (v)->blue.length   = (b); (v)->blue.offset = 0;         \
 308         (v)->green.length  = (g); (v)->green.offset = (b);      \
 309         (v)->red.length    = (r); (v)->red.offset = (b) + (g);  \
 310 })
 311
 312 /* set the RGBT bitfields of fb_var_screeninf according to
 313  * var->bits_per_pixel and given depth
 314  */
 315 static void pxafb_set_pixfmt(struct fb_var_screeninfo *var, int depth)
 316 {
 317         if (depth == 0)
 318                 depth = var->bits_per_pixel;
 319
 320         if (var->bits_per_pixel < 16) {
 321                 /* indexed pixel formats */
 322                 var->red.offset    = 0; var->red.length    = 8;
 323                 var->green.offset  = 0; var->green.length  = 8;
 324                 var->blue.offset   = 0; var->blue.length   = 8;
 325                 var->transp.offset = 0; var->transp.length = 8;
 326         }
 327
 328         switch (depth) {
 329         case 16: var->transp.length ?
 330                  SET_PIXFMT(var, 5, 5, 5, 1) :          /* RGBT555 */
 331                  SET_PIXFMT(var, 5, 6, 5, 0); break;    /* RGB565 */
 332         case 18: SET_PIXFMT(var, 6, 6, 6, 0); break;    /* RGB666 */
 333         case 19: SET_PIXFMT(var, 6, 6, 6, 1); break;    /* RGBT666 */
 334         case 24: var->transp.length ?
 335                  SET_PIXFMT(var, 8, 8, 7, 1) :          /* RGBT887 */
 336                  SET_PIXFMT(var, 8, 8, 8, 0); break;    /* RGB888 */
 337         case 25: SET_PIXFMT(var, 8, 8, 8, 1); break;    /* RGBT888 */
 338         }
 339 }
 340
 341 #ifdef CONFIG_CPU_FREQ
 342 /*
 343  *  pxafb_display_dma_period()
 344  *    Calculate the minimum period (in picoseconds) between two DMA
 345  *    requests for the LCD controller.  If we hit this, it means we're
 346  *    doing nothing but LCD DMA.
 347  */
 348 static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
 349 {
 350         /*
 351          * Period = pixclock * bits_per_byte * bytes_per_transfer
 352          *              / memory_bits_per_pixel;
 353          */
 354         return var->pixclock * 8 * 16 / var->bits_per_pixel;
 355 }
 356 #endif
 357
 358 /*
 359  * Select the smallest mode that allows the desired resolution to be
 360  * displayed. If desired parameters can be rounded up.
 361  */
 362 static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach,
 363                                              struct fb_var_screeninfo *var)
 364 {
 365         struct pxafb_mode_info *mode = NULL;
 366         struct pxafb_mode_info *modelist = mach->modes;
 367         unsigned int best_x = 0xffffffff, best_y = 0xffffffff;
 368         unsigned int i;
 369
 370         for (i = 0; i < mach->num_modes; i++) {
 371                 if (modelist[i].xres >= var->xres &&
 372                     modelist[i].yres >= var->yres &&
 373                     modelist[i].xres < best_x &&
 374                     modelist[i].yres < best_y &&
 375                     modelist[i].bpp >= var->bits_per_pixel) {
 376                         best_x = modelist[i].xres;
 377                         best_y = modelist[i].yres;
 378                         mode = &modelist[i];
 379                 }
 380         }
 381
 382         return mode;
 383 }
 384
 385 static void pxafb_setmode(struct fb_var_screeninfo *var,
 386                           struct pxafb_mode_info *mode)
 387 {
 388         var->xres               = mode->xres;
 389         var->yres               = mode->yres;
 390         var->bits_per_pixel     = mode->bpp;
 391         var->pixclock           = mode->pixclock;
 392         var->hsync_len          = mode->hsync_len;
 393         var->left_margin        = mode->left_margin;
 394         var->right_margin       = mode->right_margin;
 395         var->vsync_len          = mode->vsync_len;
 396         var->upper_margin       = mode->upper_margin;
 397         var->lower_margin       = mode->lower_margin;
 398         var->sync               = mode->sync;
 399         var->grayscale          = mode->cmap_greyscale;
 400
 401         /* set the initial RGBA bitfields */
 402         pxafb_set_pixfmt(var, mode->depth);
 403 }
 404
 405 static int pxafb_adjust_timing(struct pxafb_info *fbi,
 406                                struct fb_var_screeninfo *var)
 407 {
 408         int line_length;
 409
 410         var->xres = max_t(int, var->xres, MIN_XRES);
 411         var->yres = max_t(int, var->yres, MIN_YRES);
 412
 413         if (!(fbi->lccr0 & LCCR0_LCDT)) {
 414                 clamp_val(var->hsync_len, 1, 64);
 415                 clamp_val(var->vsync_len, 1, 64);
 416                 clamp_val(var->left_margin,  1, 255);
 417                 clamp_val(var->right_margin, 1, 255);
 418                 clamp_val(var->upper_margin, 1, 255);
 419                 clamp_val(var->lower_margin, 1, 255);
 420         }
 421
 422         /* make sure each line is aligned on word boundary */
 423         line_length = var->xres * var->bits_per_pixel / 8;
 424         line_length = ALIGN(line_length, 4);
 425         var->xres = line_length * 8 / var->bits_per_pixel;
 426
 427         /* we don't support xpan, force xres_virtual to be equal to xres */
 428         var->xres_virtual = var->xres;
 429
 430         if (var->accel_flags & FB_ACCELF_TEXT)
 431                 var->yres_virtual = fbi->fb.fix.smem_len / line_length;
 432         else
 433                 var->yres_virtual = max(var->yres_virtual, var->yres);
 434
 435         /* check for limits */
 436         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
 437                 return -EINVAL;
 438
 439         if (var->yres > var->yres_virtual)
 440                 return -EINVAL;
 441
 442         return 0;
 443 }
 444
 445 /*
 446  *  pxafb_check_var():
 447  *    Get the video params out of 'var'. If a value doesn't fit, round it up,
 448  *    if it's too big, return -EINVAL.
 449  *
 450  *    Round up in the following order: bits_per_pixel, xres,
 451  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 452  *    bitfields, horizontal timing, vertical timing.
 453  */
 454 static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 455 {
 456         struct pxafb_info *fbi = (struct pxafb_info *)info;
 457         struct pxafb_mach_info *inf = fbi->dev->platform_data;
 458         int err;
 459
 460         if (inf->fixed_modes) {
 461                 struct pxafb_mode_info *mode;
 462
 463                 mode = pxafb_getmode(inf, var);
 464                 if (!mode)
 465                         return -EINVAL;
 466                 pxafb_setmode(var, mode);
 467         }
 468
 469         /* do a test conversion to BPP fields to check the color formats */
 470         err = pxafb_var_to_bpp(var);
 471         if (err < 0)
 472                 return err;
 473
 474         pxafb_set_pixfmt(var, var_to_depth(var));
 475
 476         err = pxafb_adjust_timing(fbi, var);
 477         if (err)
 478                 return err;
 479
 480 #ifdef CONFIG_CPU_FREQ
 481         pr_debug("pxafb: dma period = %d ps\n",
 482                  pxafb_display_dma_period(var));
 483 #endif
 484
 485         return 0;
 486 }
 487
 488 /*
 489  * pxafb_set_par():
 490  *      Set the user defined part of the display for the specified console
 491  */
 492 static int pxafb_set_par(struct fb_info *info)
 493 {
 494         struct pxafb_info *fbi = (struct pxafb_info *)info;
 495         struct fb_var_screeninfo *var = &info->var;
 496
 497         if (var->bits_per_pixel >= 16)
 498                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 499         else if (!fbi->cmap_static)
 500                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 501         else {
 502                 /*
 503                  * Some people have weird ideas about wanting static
 504                  * pseudocolor maps.  I suspect their user space
 505                  * applications are broken.
 506                  */
 507                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 508         }
 509
 510         fbi->fb.fix.line_length = var->xres_virtual *
 511                                   var->bits_per_pixel / 8;
 512         if (var->bits_per_pixel >= 16)
 513                 fbi->palette_size = 0;
 514         else
 515                 fbi->palette_size = var->bits_per_pixel == 1 ?
 516                                         4 : 1 << var->bits_per_pixel;
 517
 518         fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
 519
 520         if (fbi->fb.var.bits_per_pixel >= 16)
 521                 fb_dealloc_cmap(&fbi->fb.cmap);
 522         else
 523                 fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0);
 524
 525         pxafb_activate_var(var, fbi);
 526
 527         return 0;
 528 }
 529
 530 static int pxafb_pan_display(struct fb_var_screeninfo *var,
 531                              struct fb_info *info)
 532 {
 533         struct pxafb_info *fbi = (struct pxafb_info *)info;
 534         int dma = DMA_MAX + DMA_BASE;
 535
 536         if (fbi->state != C_ENABLE)
 537                 return 0;
 538
 539         setup_base_frame(fbi, 1);
 540
 541         if (fbi->lccr0 & LCCR0_SDS)
 542                 lcd_writel(fbi, FBR1, fbi->fdadr[dma + 1] | 0x1);
 543
 544         lcd_writel(fbi, FBR0, fbi->fdadr[dma] | 0x1);
 545         return 0;
 546 }
 547
 548 /*
 549  * pxafb_blank():
 550  *      Blank the display by setting all palette values to zero.  Note, the
 551  *      16 bpp mode does not really use the palette, so this will not
 552  *      blank the display in all modes.
 553  */
 554 static int pxafb_blank(int blank, struct fb_info *info)
 555 {
 556         struct pxafb_info *fbi = (struct pxafb_info *)info;
 557         int i;
 558
 559         switch (blank) {
 560         case FB_BLANK_POWERDOWN:
 561         case FB_BLANK_VSYNC_SUSPEND:
 562         case FB_BLANK_HSYNC_SUSPEND:
 563         case FB_BLANK_NORMAL:
 564                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 565                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 566                         for (i = 0; i < fbi->palette_size; i++)
 567                                 pxafb_setpalettereg(i, 0, 0, 0, 0, info);
 568
 569                 pxafb_schedule_work(fbi, C_DISABLE);
 570                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
 571                 break;
 572
 573         case FB_BLANK_UNBLANK:
 574                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
 575                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 576                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 577                         fb_set_cmap(&fbi->fb.cmap, info);
 578                 pxafb_schedule_work(fbi, C_ENABLE);
 579         }
 580         return 0;
 581 }
 582
 583 static struct fb_ops pxafb_ops = {
 584         .owner          = THIS_MODULE,
 585         .fb_check_var   = pxafb_check_var,
 586         .fb_set_par     = pxafb_set_par,
 587         .fb_pan_display = pxafb_pan_display,
 588         .fb_setcolreg   = pxafb_setcolreg,
 589         .fb_fillrect    = cfb_fillrect,
 590         .fb_copyarea    = cfb_copyarea,
 591         .fb_imageblit   = cfb_imageblit,
 592         .fb_blank       = pxafb_blank,
 593 };
 594
 595 #ifdef CONFIG_FB_PXA_OVERLAY
 596 static void overlay1fb_setup(struct pxafb_layer *ofb)
 597 {
 598         int size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
 599         unsigned long start = ofb->video_mem_phys;
 600         setup_frame_dma(ofb->fbi, DMA_OV1, PAL_NONE, start, size);
 601 }
 602
 603 /* Depending on the enable status of overlay1/2, the DMA should be
 604  * updated from FDADRx (when disabled) or FBRx (when enabled).
 605  */
 606 static void overlay1fb_enable(struct pxafb_layer *ofb)
 607 {
 608         int enabled = lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN;
 609         uint32_t fdadr1 = ofb->fbi->fdadr[DMA_OV1] | (enabled ? 0x1 : 0);
 610
 611         lcd_writel(ofb->fbi, enabled ? FBR1 : FDADR1, fdadr1);
 612         lcd_writel(ofb->fbi, OVL1C2, ofb->control[1]);
 613         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] | OVLxC1_OEN);
 614 }
 615
 616 static void overlay1fb_disable(struct pxafb_layer *ofb)
 617 {
 618         uint32_t lccr5 = lcd_readl(ofb->fbi, LCCR5);
 619
 620         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] & ~OVLxC1_OEN);
 621
 622         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(1));
 623         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(1));
 624         lcd_writel(ofb->fbi, FBR1, ofb->fbi->fdadr[DMA_OV1] | 0x3);
 625
 626         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
 627                 pr_warning("%s: timeout disabling overlay1\n", __func__);
 628
 629         lcd_writel(ofb->fbi, LCCR5, lccr5);
 630 }
 631
 632 static void overlay2fb_setup(struct pxafb_layer *ofb)
 633 {
 634         int size, div = 1, pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
 635         unsigned long start[3] = { ofb->video_mem_phys, 0, 0 };
 636
 637         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED) {
 638                 size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
 639                 setup_frame_dma(ofb->fbi, DMA_OV2_Y, -1, start[0], size);
 640         } else {
 641                 size = ofb->fb.var.xres_virtual * ofb->fb.var.yres_virtual;
 642                 switch (pfor) {
 643                 case OVERLAY_FORMAT_YUV444_PLANAR: div = 1; break;
 644                 case OVERLAY_FORMAT_YUV422_PLANAR: div = 2; break;
 645                 case OVERLAY_FORMAT_YUV420_PLANAR: div = 4; break;
 646                 }
 647                 start[1] = start[0] + size;
 648                 start[2] = start[1] + size / div;
 649                 setup_frame_dma(ofb->fbi, DMA_OV2_Y,  -1, start[0], size);
 650                 setup_frame_dma(ofb->fbi, DMA_OV2_Cb, -1, start[1], size / div);
 651                 setup_frame_dma(ofb->fbi, DMA_OV2_Cr, -1, start[2], size / div);
 652         }
 653 }
 654
 655 static void overlay2fb_enable(struct pxafb_layer *ofb)
 656 {
 657         int pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
 658         int enabled = lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN;
 659         uint32_t fdadr2 = ofb->fbi->fdadr[DMA_OV2_Y]  | (enabled ? 0x1 : 0);
 660         uint32_t fdadr3 = ofb->fbi->fdadr[DMA_OV2_Cb] | (enabled ? 0x1 : 0);
 661         uint32_t fdadr4 = ofb->fbi->fdadr[DMA_OV2_Cr] | (enabled ? 0x1 : 0);
 662
 663         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED)
 664                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
 665         else {
 666                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
 667                 lcd_writel(ofb->fbi, enabled ? FBR3 : FDADR3, fdadr3);
 668                 lcd_writel(ofb->fbi, enabled ? FBR4 : FDADR4, fdadr4);
 669         }
 670         lcd_writel(ofb->fbi, OVL2C2, ofb->control[1]);
 671         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] | OVLxC1_OEN);
 672 }
 673
 674 static void overlay2fb_disable(struct pxafb_layer *ofb)
 675 {
 676         uint32_t lccr5 = lcd_readl(ofb->fbi, LCCR5);
 677
 678         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] & ~OVLxC1_OEN);
 679
 680         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(2));
 681         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(2));
 682         lcd_writel(ofb->fbi, FBR2, ofb->fbi->fdadr[DMA_OV2_Y]  | 0x3);
 683         lcd_writel(ofb->fbi, FBR3, ofb->fbi->fdadr[DMA_OV2_Cb] | 0x3);
 684         lcd_writel(ofb->fbi, FBR4, ofb->fbi->fdadr[DMA_OV2_Cr] | 0x3);
 685
 686         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
 687                 pr_warning("%s: timeout disabling overlay2\n", __func__);
 688 }
 689
 690 static struct pxafb_layer_ops ofb_ops[] = {
 691         [0] = {
 692                 .enable         = overlay1fb_enable,
 693                 .disable        = overlay1fb_disable,
 694                 .setup          = overlay1fb_setup,
 695         },
 696         [1] = {
 697                 .enable         = overlay2fb_enable,
 698                 .disable        = overlay2fb_disable,
 699                 .setup          = overlay2fb_setup,
 700         },
 701 };
 702
 703 static int overlayfb_open(struct fb_info *info, int user)
 704 {
 705         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
 706
 707         /* no support for framebuffer console on overlay */
 708         if (user == 0)
 709                 return -ENODEV;
 710
 711         /* allow only one user at a time */
 712         if (atomic_inc_and_test(&ofb->usage))
 713                 return -EBUSY;
 714
 715         /* unblank the base framebuffer */
 716         fb_blank(&ofb->fbi->fb, FB_BLANK_UNBLANK);
 717         return 0;
 718 }
 719
 720 static int overlayfb_release(struct fb_info *info, int user)
 721 {
 722         struct pxafb_layer *ofb = (struct pxafb_layer*) info;
 723
 724         atomic_dec(&ofb->usage);
 725         ofb->ops->disable(ofb);
 726
 727         free_pages_exact(ofb->video_mem, ofb->video_mem_size);
 728         ofb->video_mem = NULL;
 729         ofb->video_mem_size = 0;
 730         return 0;
 731 }
 732
 733 static int overlayfb_check_var(struct fb_var_screeninfo *var,
 734                                struct fb_info *info)
 735 {
 736         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
 737         struct fb_var_screeninfo *base_var = &ofb->fbi->fb.var;
 738         int xpos, ypos, pfor, bpp;
 739
 740         xpos = NONSTD_TO_XPOS(var->nonstd);
 741         ypos = NONSTD_TO_XPOS(var->nonstd);
 742         pfor = NONSTD_TO_PFOR(var->nonstd);
 743
 744         bpp = pxafb_var_to_bpp(var);
 745         if (bpp < 0)
 746                 return -EINVAL;
 747
 748         /* no support for YUV format on overlay1 */
 749         if (ofb->id == OVERLAY1 && pfor != 0)
 750                 return -EINVAL;
 751
 752         /* for YUV packed formats, bpp = 'minimum bpp of YUV components' */
 753         switch (pfor) {
 754         case OVERLAY_FORMAT_RGB:
 755                 bpp = pxafb_var_to_bpp(var);
 756                 if (bpp < 0)
 757                         return -EINVAL;
 758
 759                 pxafb_set_pixfmt(var, var_to_depth(var));
 760                 break;
 761         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
 762         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 8; break;
 763         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 4; break;
 764         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 2; break;
 765         default:
 766                 return -EINVAL;
 767         }
 768
 769         /* each line must start at a 32-bit word boundary */
 770         if ((xpos * bpp) % 32)
 771                 return -EINVAL;
 772
 773         /* xres must align on 32-bit word boundary */
 774         var->xres = roundup(var->xres * bpp, 32) / bpp;
 775
 776         if ((xpos + var->xres > base_var->xres) ||
 777             (ypos + var->yres > base_var->yres))
 778                 return -EINVAL;
 779
 780         var->xres_virtual = var->xres;
 781         var->yres_virtual = max(var->yres, var->yres_virtual);
 782         return 0;
 783 }
 784
 785 static int overlayfb_map_video_memory(struct pxafb_layer *ofb)
 786 {
 787         struct fb_var_screeninfo *var = &ofb->fb.var;
 788         int pfor = NONSTD_TO_PFOR(var->nonstd);
 789         int size, bpp = 0;
 790
 791         switch (pfor) {
 792         case OVERLAY_FORMAT_RGB: bpp = var->bits_per_pixel; break;
 793         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
 794         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 24; break;
 795         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 16; break;
 796         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 12; break;
 797         }
 798
 799         ofb->fb.fix.line_length = var->xres_virtual * bpp / 8;
 800
 801         size = PAGE_ALIGN(ofb->fb.fix.line_length * var->yres_virtual);
 802
 803         /* don't re-allocate if the original video memory is enough */
 804         if (ofb->video_mem) {
 805                 if (ofb->video_mem_size >= size)
 806                         return 0;
 807
 808                 free_pages_exact(ofb->video_mem, ofb->video_mem_size);
 809         }
 810
 811         ofb->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
 812         if (ofb->video_mem == NULL)
 813                 return -ENOMEM;
 814
 815         ofb->video_mem_phys = virt_to_phys(ofb->video_mem);
 816         ofb->video_mem_size = size;
 817
 818         ofb->fb.fix.smem_start  = ofb->video_mem_phys;
 819         ofb->fb.fix.smem_len    = ofb->fb.fix.line_length * var->yres_virtual;
 820         ofb->fb.screen_base     = ofb->video_mem;
 821         return 0;
 822 }
 823
 824 static int overlayfb_set_par(struct fb_info *info)
 825 {
 826         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
 827         struct fb_var_screeninfo *var = &info->var;
 828         int xpos, ypos, pfor, bpp, ret;
 829
 830         ret = overlayfb_map_video_memory(ofb);
 831         if (ret)
 832                 return ret;
 833
 834         bpp  = pxafb_var_to_bpp(var);
 835         xpos = NONSTD_TO_XPOS(var->nonstd);
 836         ypos = NONSTD_TO_XPOS(var->nonstd);
 837         pfor = NONSTD_TO_PFOR(var->nonstd);
 838
 839         ofb->control[0] = OVLxC1_PPL(var->xres) | OVLxC1_LPO(var->yres) |
 840                           OVLxC1_BPP(bpp);
 841         ofb->control[1] = OVLxC2_XPOS(xpos) | OVLxC2_YPOS(ypos);
 842
 843         if (ofb->id == OVERLAY2)
 844                 ofb->control[1] |= OVL2C2_PFOR(pfor);
 845
 846         ofb->ops->setup(ofb);
 847         ofb->ops->enable(ofb);
 848         return 0;
 849 }
 850
 851 static struct fb_ops overlay_fb_ops = {
 852         .owner                  = THIS_MODULE,
 853         .fb_open                = overlayfb_open,
 854         .fb_release             = overlayfb_release,
 855         .fb_check_var           = overlayfb_check_var,
 856         .fb_set_par             = overlayfb_set_par,
 857 };
 858
 859 static void __devinit init_pxafb_overlay(struct pxafb_info *fbi,
 860                                          struct pxafb_layer *ofb, int id)
 861 {
 862         sprintf(ofb->fb.fix.id, "overlay%d", id + 1);
 863
 864         ofb->fb.fix.type                = FB_TYPE_PACKED_PIXELS;
 865         ofb->fb.fix.xpanstep            = 0;
 866         ofb->fb.fix.ypanstep            = 1;
 867
 868         ofb->fb.var.activate            = FB_ACTIVATE_NOW;
 869         ofb->fb.var.height              = -1;
 870         ofb->fb.var.width               = -1;
 871         ofb->fb.var.vmode               = FB_VMODE_NONINTERLACED;
 872
 873         ofb->fb.fbops                   = &overlay_fb_ops;
 874         ofb->fb.flags                   = FBINFO_FLAG_DEFAULT;
 875         ofb->fb.node                    = -1;
 876         ofb->fb.pseudo_palette          = NULL;
 877
 878         ofb->id = id;
 879         ofb->ops = &ofb_ops[id];
 880         atomic_set(&ofb->usage, 0);
 881         ofb->fbi = fbi;
 882         init_completion(&ofb->branch_done);
 883 }
 884
 885 static int __devinit pxafb_overlay_init(struct pxafb_info *fbi)
 886 {
 887         int i, ret;
 888
 889         for (i = 0; i < 2; i++) {
 890                 init_pxafb_overlay(fbi, &fbi->overlay[i], i);
 891                 ret = register_framebuffer(&fbi->overlay[i].fb);
 892                 if (ret) {
 893                         dev_err(fbi->dev, "failed to register overlay %d\n", i);
 894                         return ret;
 895                 }
 896         }
 897
 898         /* mask all IU/BS/EOF/SOF interrupts */
 899         lcd_writel(fbi, LCCR5, ~0);
 900
 901         /* place overlay(s) on top of base */
 902         fbi->lccr0 |= LCCR0_OUC;
 903         pr_info("PXA Overlay driver loaded successfully!\n");
 904         return 0;
 905 }
 906
 907 static void __devexit pxafb_overlay_exit(struct pxafb_info *fbi)
 908 {
 909         int i;
 910
 911         for (i = 0; i < 2; i++)
 912                 unregister_framebuffer(&fbi->overlay[i].fb);
 913 }
 914 #else
 915 static inline void pxafb_overlay_init(struct pxafb_info *fbi) {}
 916 static inline void pxafb_overlay_exit(struct pxafb_info *fbi) {}
 917 #endif /* CONFIG_FB_PXA_OVERLAY */
 918
 919 /*
 920  * Calculate the PCD value from the clock rate (in picoseconds).
 921  * We take account of the PPCR clock setting.
 922  * From PXA Developer's Manual:
 923  *
 924  *   PixelClock =      LCLK
 925  *                -------------
 926  *                2 ( PCD + 1 )
 927  *
 928  *   PCD =      LCLK
 929  *         ------------- - 1
 930  *         2(PixelClock)
 931  *
 932  * Where:
 933  *   LCLK = LCD/Memory Clock
 934  *   PCD = LCCR3[7:0]
 935  *
 936  * PixelClock here is in Hz while the pixclock argument given is the
 937  * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 )
 938  *
 939  * The function get_lclk_frequency_10khz returns LCLK in units of
 940  * 10khz. Calling the result of this function lclk gives us the
 941  * following
 942  *
 943  *    PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 )
 944  *          -------------------------------------- - 1
 945  *                          2
 946  *
 947  * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below.
 948  */
 949 static inline unsigned int get_pcd(struct pxafb_info *fbi,
 950                                    unsigned int pixclock)
 951 {
 952         unsigned long long pcd;
 953
 954         /* FIXME: Need to take into account Double Pixel Clock mode
 955          * (DPC) bit? or perhaps set it based on the various clock
 956          * speeds */
 957         pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000);
 958         pcd *= pixclock;
 959         do_div(pcd, 100000000 * 2);
 960         /* no need for this, since we should subtract 1 anyway. they cancel */
 961         /* pcd += 1; */ /* make up for integer math truncations */
 962         return (unsigned int)pcd;
 963 }
 964
 965 /*
 966  * Some touchscreens need hsync information from the video driver to
 967  * function correctly. We export it here.  Note that 'hsync_time' and
 968  * the value returned from pxafb_get_hsync_time() is the *reciprocal*
 969  * of the hsync period in seconds.
 970  */
 971 static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd)
 972 {
 973         unsigned long htime;
 974
 975         if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) {
 976                 fbi->hsync_time = 0;
 977                 return;
 978         }
 979
 980         htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len);
 981
 982         fbi->hsync_time = htime;
 983 }
 984
 985 unsigned long pxafb_get_hsync_time(struct device *dev)
 986 {
 987         struct pxafb_info *fbi = dev_get_drvdata(dev);
 988
 989         /* If display is blanked/suspended, hsync isn't active */
 990         if (!fbi || (fbi->state != C_ENABLE))
 991                 return 0;
 992
 993         return fbi->hsync_time;
 994 }
 995 EXPORT_SYMBOL(pxafb_get_hsync_time);
 996
 997 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
 998                            unsigned long start, size_t size)
 999 {
1000         struct pxafb_dma_descriptor *dma_desc, *pal_desc;
1001         unsigned int dma_desc_off, pal_desc_off;
1002
1003         if (dma < 0 || dma >= DMA_MAX * 2)
1004                 return -EINVAL;
1005
1006         dma_desc = &fbi->dma_buff->dma_desc[dma];
1007         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]);
1008
1009         dma_desc->fsadr = start;
1010         dma_desc->fidr  = 0;
1011         dma_desc->ldcmd = size;
1012
1013         if (pal < 0 || pal >= PAL_MAX * 2) {
1014                 dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1015                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1016         } else {
1017                 pal_desc = &fbi->dma_buff->pal_desc[pal];
1018                 pal_desc_off = offsetof(struct pxafb_dma_buff, pal_desc[pal]);
1019
1020                 pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE;
1021                 pal_desc->fidr  = 0;
1022
1023                 if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
1024                         pal_desc->ldcmd = fbi->palette_size * sizeof(u16);
1025                 else
1026                         pal_desc->ldcmd = fbi->palette_size * sizeof(u32);
1027
1028                 pal_desc->ldcmd |= LDCMD_PAL;
1029
1030                 /* flip back and forth between palette and frame buffer */
1031                 pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1032                 dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off;
1033                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1034         }
1035
1036         return 0;
1037 }
1038
1039 static void setup_base_frame(struct pxafb_info *fbi, int branch)
1040 {
1041         struct fb_var_screeninfo *var = &fbi->fb.var;
1042         struct fb_fix_screeninfo *fix = &fbi->fb.fix;
1043         int nbytes, dma, pal, bpp = var->bits_per_pixel;
1044         unsigned long offset;
1045
1046         dma = DMA_BASE + (branch ? DMA_MAX : 0);
1047         pal = (bpp >= 16) ? PAL_NONE : PAL_BASE + (branch ? PAL_MAX : 0);
1048
1049         nbytes = fix->line_length * var->yres;
1050         offset = fix->line_length * var->yoffset + fbi->video_mem_phys;
1051
1052         if (fbi->lccr0 & LCCR0_SDS) {
1053                 nbytes = nbytes / 2;
1054                 setup_frame_dma(fbi, dma + 1, PAL_NONE, offset + nbytes, nbytes);
1055         }
1056
1057         setup_frame_dma(fbi, dma, pal, offset, nbytes);
1058 }
1059
1060 #ifdef CONFIG_FB_PXA_SMARTPANEL
1061 static int setup_smart_dma(struct pxafb_info *fbi)
1062 {
1063         struct pxafb_dma_descriptor *dma_desc;
1064         unsigned long dma_desc_off, cmd_buff_off;
1065
1066         dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD];
1067         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]);
1068         cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff);
1069
1070         dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1071         dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off;
1072         dma_desc->fidr  = 0;
1073         dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t);
1074
1075         fbi->fdadr[DMA_CMD] = dma_desc->fdadr;
1076         return 0;
1077 }
1078
1079 int pxafb_smart_flush(struct fb_info *info)
1080 {
1081         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1082         uint32_t prsr;
1083         int ret = 0;
1084
1085         /* disable controller until all registers are set up */
1086         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1087
1088         /* 1. make it an even number of commands to align on 32-bit boundary
1089          * 2. add the interrupt command to the end of the chain so we can
1090          *    keep track of the end of the transfer
1091          */
1092
1093         while (fbi->n_smart_cmds & 1)
1094                 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP;
1095
1096         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT;
1097         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC;
1098         setup_smart_dma(fbi);
1099
1100         /* continue to execute next command */
1101         prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT;
1102         lcd_writel(fbi, PRSR, prsr);
1103
1104         /* stop the processor in case it executed "wait for sync" cmd */
1105         lcd_writel(fbi, CMDCR, 0x0001);
1106
1107         /* don't send interrupts for fifo underruns on channel 6 */
1108         lcd_writel(fbi, LCCR5, LCCR5_IUM(6));
1109
1110         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1111         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1112         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1113         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1114         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1115         lcd_writel(fbi, FDADR6, fbi->fdadr[6]);
1116
1117         /* begin sending */
1118         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1119
1120         if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) {
1121                 pr_warning("%s: timeout waiting for command done\n",
1122                                 __func__);
1123                 ret = -ETIMEDOUT;
1124         }
1125
1126         /* quick disable */
1127         prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT);
1128         lcd_writel(fbi, PRSR, prsr);
1129         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1130         lcd_writel(fbi, FDADR6, 0);
1131         fbi->n_smart_cmds = 0;
1132         return ret;
1133 }
1134
1135 int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
1136 {
1137         int i;
1138         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1139
1140         for (i = 0; i < n_cmds; i++, cmds++) {
1141                 /* if it is a software delay, flush and delay */
1142                 if ((*cmds & 0xff00) == SMART_CMD_DELAY) {
1143                         pxafb_smart_flush(info);
1144                         mdelay(*cmds & 0xff);
1145                         continue;
1146                 }
1147
1148                 /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */
1149                 if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8)
1150                         pxafb_smart_flush(info);
1151
1152                 fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds;
1153         }
1154
1155         return 0;
1156 }
1157
1158 static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk)
1159 {
1160         unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000);
1161         return (t == 0) ? 1 : t;
1162 }
1163
1164 static void setup_smart_timing(struct pxafb_info *fbi,
1165                                 struct fb_var_screeninfo *var)
1166 {
1167         struct pxafb_mach_info *inf = fbi->dev->platform_data;
1168         struct pxafb_mode_info *mode = &inf->modes[0];
1169         unsigned long lclk = clk_get_rate(fbi->clk);
1170         unsigned t1, t2, t3, t4;
1171
1172         t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld);
1173         t2 = max(mode->rd_pulse_width, mode->wr_pulse_width);
1174         t3 = mode->op_hold_time;
1175         t4 = mode->cmd_inh_time;
1176
1177         fbi->reg_lccr1 =
1178                 LCCR1_DisWdth(var->xres) |
1179                 LCCR1_BegLnDel(__smart_timing(t1, lclk)) |
1180                 LCCR1_EndLnDel(__smart_timing(t2, lclk)) |
1181                 LCCR1_HorSnchWdth(__smart_timing(t3, lclk));
1182
1183         fbi->reg_lccr2 = LCCR2_DisHght(var->yres);
1184         fbi->reg_lccr3 = fbi->lccr3 | LCCR3_PixClkDiv(__smart_timing(t4, lclk));
1185         fbi->reg_lccr3 |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? LCCR3_HSP : 0;
1186         fbi->reg_lccr3 |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? LCCR3_VSP : 0;
1187
1188         /* FIXME: make this configurable */
1189         fbi->reg_cmdcr = 1;
1190 }
1191
1192 static int pxafb_smart_thread(void *arg)
1193 {
1194         struct pxafb_info *fbi = arg;
1195         struct pxafb_mach_info *inf = fbi->dev->platform_data;
1196
1197         if (!fbi || !inf->smart_update) {
1198                 pr_err("%s: not properly initialized, thread terminated\n",
1199                                 __func__);
1200                 return -EINVAL;
1201         }
1202
1203         pr_debug("%s(): task starting\n", __func__);
1204
1205         set_freezable();
1206         while (!kthread_should_stop()) {
1207
1208                 if (try_to_freeze())
1209                         continue;
1210
1211                 mutex_lock(&fbi->ctrlr_lock);
1212
1213                 if (fbi->state == C_ENABLE) {
1214                         inf->smart_update(&fbi->fb);
1215                         complete(&fbi->refresh_done);
1216                 }
1217
1218                 mutex_unlock(&fbi->ctrlr_lock);
1219
1220                 set_current_state(TASK_INTERRUPTIBLE);
1221                 schedule_timeout(30 * HZ / 1000);
1222         }
1223
1224         pr_debug("%s(): task ending\n", __func__);
1225         return 0;
1226 }
1227
1228 static int pxafb_smart_init(struct pxafb_info *fbi)
1229 {
1230         if (!(fbi->lccr0 & LCCR0_LCDT))
1231                 return 0;
1232
1233         fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff;
1234         fbi->n_smart_cmds = 0;
1235
1236         init_completion(&fbi->command_done);
1237         init_completion(&fbi->refresh_done);
1238
1239         fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi,
1240                                         "lcd_refresh");
1241         if (IS_ERR(fbi->smart_thread)) {
1242                 pr_err("%s: unable to create kernel thread\n", __func__);
1243                 return PTR_ERR(fbi->smart_thread);
1244         }
1245
1246         return 0;
1247 }
1248 #else
1249 int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
1250 {
1251         return 0;
1252 }
1253
1254 int pxafb_smart_flush(struct fb_info *info)
1255 {
1256         return 0;
1257 }
1258
1259 static inline int pxafb_smart_init(struct pxafb_info *fbi) { return 0; }
1260 #endif /* CONFIG_FB_PXA_SMARTPANEL */
1261
1262 static void setup_parallel_timing(struct pxafb_info *fbi,
1263                                   struct fb_var_screeninfo *var)
1264 {
1265         unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock);
1266
1267         fbi->reg_lccr1 =
1268                 LCCR1_DisWdth(var->xres) +
1269                 LCCR1_HorSnchWdth(var->hsync_len) +
1270                 LCCR1_BegLnDel(var->left_margin) +
1271                 LCCR1_EndLnDel(var->right_margin);
1272
1273         /*
1274          * If we have a dual scan LCD, we need to halve
1275          * the YRES parameter.
1276          */
1277         lines_per_panel = var->yres;
1278         if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual)
1279                 lines_per_panel /= 2;
1280
1281         fbi->reg_lccr2 =
1282                 LCCR2_DisHght(lines_per_panel) +
1283                 LCCR2_VrtSnchWdth(var->vsync_len) +
1284                 LCCR2_BegFrmDel(var->upper_margin) +
1285                 LCCR2_EndFrmDel(var->lower_margin);
1286
1287         fbi->reg_lccr3 = fbi->lccr3 |
1288                 (var->sync & FB_SYNC_HOR_HIGH_ACT ?
1289                  LCCR3_HorSnchH : LCCR3_HorSnchL) |
1290                 (var->sync & FB_SYNC_VERT_HIGH_ACT ?
1291                  LCCR3_VrtSnchH : LCCR3_VrtSnchL);
1292
1293         if (pcd) {
1294                 fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd);
1295                 set_hsync_time(fbi, pcd);
1296         }
1297 }
1298
1299 /*
1300  * pxafb_activate_var():
1301  *      Configures LCD Controller based on entries in var parameter.
1302  *      Settings are only written to the controller if changes were made.
1303  */
1304 static int pxafb_activate_var(struct fb_var_screeninfo *var,
1305                               struct pxafb_info *fbi)
1306 {
1307         u_long flags;
1308
1309         /* Update shadow copy atomically */
1310         local_irq_save(flags);
1311
1312 #ifdef CONFIG_FB_PXA_SMARTPANEL
1313         if (fbi->lccr0 & LCCR0_LCDT)
1314                 setup_smart_timing(fbi, var);
1315         else
1316 #endif
1317                 setup_parallel_timing(fbi, var);
1318
1319         setup_base_frame(fbi, 0);
1320
1321         fbi->reg_lccr0 = fbi->lccr0 |
1322                 (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
1323                  LCCR0_QDM | LCCR0_BM  | LCCR0_OUM);
1324
1325         fbi->reg_lccr3 |= pxafb_var_to_lccr3(var);
1326
1327         fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK;
1328         fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK);
1329         local_irq_restore(flags);
1330
1331         /*
1332          * Only update the registers if the controller is enabled
1333          * and something has changed.
1334          */
1335         if ((lcd_readl(fbi, LCCR0) != fbi->reg_lccr0) ||
1336             (lcd_readl(fbi, LCCR1) != fbi->reg_lccr1) ||
1337             (lcd_readl(fbi, LCCR2) != fbi->reg_lccr2) ||
1338             (lcd_readl(fbi, LCCR3) != fbi->reg_lccr3) ||
1339             (lcd_readl(fbi, LCCR4) != fbi->reg_lccr4) ||
1340             (lcd_readl(fbi, FDADR0) != fbi->fdadr[0]) ||
1341             (lcd_readl(fbi, FDADR1) != fbi->fdadr[1]))
1342                 pxafb_schedule_work(fbi, C_REENABLE);
1343
1344         return 0;
1345 }
1346
1347 /*
1348  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
1349  * Do not call them directly; set_ctrlr_state does the correct serialisation
1350  * to ensure that things happen in the right way 100% of time time.
1351  *      -- rmk
1352  */
1353 static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on)
1354 {
1355         pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff");
1356
1357         if (fbi->backlight_power)
1358                 fbi->backlight_power(on);
1359 }
1360
1361 static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on)
1362 {
1363         pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff");
1364
1365         if (fbi->lcd_power)
1366                 fbi->lcd_power(on, &fbi->fb.var);
1367 }
1368
1369 static void pxafb_enable_controller(struct pxafb_info *fbi)
1370 {
1371         pr_debug("pxafb: Enabling LCD controller\n");
1372         pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]);
1373         pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]);
1374         pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
1375         pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
1376         pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
1377         pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
1378
1379         /* enable LCD controller clock */
1380         clk_enable(fbi->clk);
1381
1382         if (fbi->lccr0 & LCCR0_LCDT)
1383                 return;
1384
1385         /* Sequence from 11.7.10 */
1386         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1387         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1388         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1389         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1390         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1391
1392         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1393         lcd_writel(fbi, FDADR1, fbi->fdadr[1]);
1394         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1395 }
1396
1397 static void pxafb_disable_controller(struct pxafb_info *fbi)
1398 {
1399         uint32_t lccr0;
1400
1401 #ifdef CONFIG_FB_PXA_SMARTPANEL
1402         if (fbi->lccr0 & LCCR0_LCDT) {
1403                 wait_for_completion_timeout(&fbi->refresh_done,
1404                                 200 * HZ / 1000);
1405                 return;
1406         }
1407 #endif
1408
1409         /* Clear LCD Status Register */
1410         lcd_writel(fbi, LCSR, 0xffffffff);
1411
1412         lccr0 = lcd_readl(fbi, LCCR0) & ~LCCR0_LDM;
1413         lcd_writel(fbi, LCCR0, lccr0);
1414         lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS);
1415
1416         wait_for_completion_timeout(&fbi->disable_done, 200 * HZ / 1000);
1417
1418         /* disable LCD controller clock */
1419         clk_disable(fbi->clk);
1420 }
1421
1422 /*
1423  *  pxafb_handle_irq: Handle 'LCD DONE' interrupts.
1424  */
1425 static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
1426 {
1427         struct pxafb_info *fbi = dev_id;
1428         unsigned int lccr0, lcsr, lcsr1;
1429
1430         lcsr = lcd_readl(fbi, LCSR);
1431         if (lcsr & LCSR_LDD) {
1432                 lccr0 = lcd_readl(fbi, LCCR0);
1433                 lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM);
1434                 complete(&fbi->disable_done);
1435         }
1436
1437 #ifdef CONFIG_FB_PXA_SMARTPANEL
1438         if (lcsr & LCSR_CMD_INT)
1439                 complete(&fbi->command_done);
1440 #endif
1441         lcd_writel(fbi, LCSR, lcsr);
1442
1443 #ifdef CONFIG_FB_PXA_OVERLAY
1444         lcsr1 = lcd_readl(fbi, LCSR1);
1445         if (lcsr1 & LCSR1_BS(1))
1446                 complete(&fbi->overlay[0].branch_done);
1447
1448         if (lcsr1 & LCSR1_BS(2))
1449                 complete(&fbi->overlay[1].branch_done);
1450
1451         lcd_writel(fbi, LCSR1, lcsr1);
1452 #endif
1453         return IRQ_HANDLED;
1454 }
1455
1456 /*
1457  * This function must be called from task context only, since it will
1458  * sleep when disabling the LCD controller, or if we get two contending
1459  * processes trying to alter state.
1460  */
1461 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
1462 {
1463         u_int old_state;
1464
1465         mutex_lock(&fbi->ctrlr_lock);
1466
1467         old_state = fbi->state;
1468
1469         /*
1470          * Hack around fbcon initialisation.
1471          */
1472         if (old_state == C_STARTUP && state == C_REENABLE)
1473                 state = C_ENABLE;
1474
1475         switch (state) {
1476         case C_DISABLE_CLKCHANGE:
1477                 /*
1478                  * Disable controller for clock change.  If the
1479                  * controller is already disabled, then do nothing.
1480                  */
1481                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
1482                         fbi->state = state;
1483                         /* TODO __pxafb_lcd_power(fbi, 0); */
1484                         pxafb_disable_controller(fbi);
1485                 }
1486                 break;
1487
1488         case C_DISABLE_PM:
1489         case C_DISABLE:
1490                 /*
1491                  * Disable controller
1492                  */
1493                 if (old_state != C_DISABLE) {
1494                         fbi->state = state;
1495                         __pxafb_backlight_power(fbi, 0);
1496                         __pxafb_lcd_power(fbi, 0);
1497                         if (old_state != C_DISABLE_CLKCHANGE)
1498                                 pxafb_disable_controller(fbi);
1499                 }
1500                 break;
1501
1502         case C_ENABLE_CLKCHANGE:
1503                 /*
1504                  * Enable the controller after clock change.  Only
1505                  * do this if we were disabled for the clock change.
1506                  */
1507                 if (old_state == C_DISABLE_CLKCHANGE) {
1508                         fbi->state = C_ENABLE;
1509                         pxafb_enable_controller(fbi);
1510                         /* TODO __pxafb_lcd_power(fbi, 1); */
1511                 }
1512                 break;
1513
1514         case C_REENABLE:
1515                 /*
1516                  * Re-enable the controller only if it was already
1517                  * enabled.  This is so we reprogram the control
1518                  * registers.
1519                  */
1520                 if (old_state == C_ENABLE) {
1521                         __pxafb_lcd_power(fbi, 0);
1522                         pxafb_disable_controller(fbi);
1523                         pxafb_enable_controller(fbi);
1524                         __pxafb_lcd_power(fbi, 1);
1525                 }
1526                 break;
1527
1528         case C_ENABLE_PM:
1529                 /*
1530                  * Re-enable the controller after PM.  This is not
1531                  * perfect - think about the case where we were doing
1532                  * a clock change, and we suspended half-way through.
1533                  */
1534                 if (old_state != C_DISABLE_PM)
1535                         break;
1536                 /* fall through */
1537
1538         case C_ENABLE:
1539                 /*
1540                  * Power up the LCD screen, enable controller, and
1541                  * turn on the backlight.
1542                  */
1543                 if (old_state != C_ENABLE) {
1544                         fbi->state = C_ENABLE;
1545                         pxafb_enable_controller(fbi);
1546                         __pxafb_lcd_power(fbi, 1);
1547                         __pxafb_backlight_power(fbi, 1);
1548                 }
1549                 break;
1550         }
1551         mutex_unlock(&fbi->ctrlr_lock);
1552 }
1553
1554 /*
1555  * Our LCD controller task (which is called when we blank or unblank)
1556  * via keventd.
1557  */
1558 static void pxafb_task(struct work_struct *work)
1559 {
1560         struct pxafb_info *fbi =
1561                 container_of(work, struct pxafb_info, task);
1562         u_int state = xchg(&fbi->task_state, -1);
1563
1564         set_ctrlr_state(fbi, state);
1565 }
1566
1567 #ifdef CONFIG_CPU_FREQ
1568 /*
1569  * CPU clock speed change handler.  We need to adjust the LCD timing
1570  * parameters when the CPU clock is adjusted by the power management
1571  * subsystem.
1572  *
1573  * TODO: Determine why f->new != 10*get_lclk_frequency_10khz()
1574  */
1575 static int
1576 pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
1577 {
1578         struct pxafb_info *fbi = TO_INF(nb, freq_transition);
1579         /* TODO struct cpufreq_freqs *f = data; */
1580         u_int pcd;
1581
1582         switch (val) {
1583         case CPUFREQ_PRECHANGE:
1584                 set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1585                 break;
1586
1587         case CPUFREQ_POSTCHANGE:
1588                 pcd = get_pcd(fbi, fbi->fb.var.pixclock);
1589                 set_hsync_time(fbi, pcd);
1590                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) |
1591                                   LCCR3_PixClkDiv(pcd);
1592                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1593                 break;
1594         }
1595         return 0;
1596 }
1597
1598 static int
1599 pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
1600 {
1601         struct pxafb_info *fbi = TO_INF(nb, freq_policy);
1602         struct fb_var_screeninfo *var = &fbi->fb.var;
1603         struct cpufreq_policy *policy = data;
1604
1605         switch (val) {
1606         case CPUFREQ_ADJUST:
1607         case CPUFREQ_INCOMPATIBLE:
1608                 pr_debug("min dma period: %d ps, "
1609                         "new clock %d kHz\n", pxafb_display_dma_period(var),
1610                         policy->max);
1611                 /* TODO: fill in min/max values */
1612                 break;
1613         }
1614         return 0;
1615 }
1616 #endif
1617
1618 #ifdef CONFIG_PM
1619 /*
1620  * Power management hooks.  Note that we won't be called from IRQ context,
1621  * unlike the blank functions above, so we may sleep.
1622  */
1623 static int pxafb_suspend(struct platform_device *dev, pm_message_t state)
1624 {
1625         struct pxafb_info *fbi = platform_get_drvdata(dev);
1626
1627         set_ctrlr_state(fbi, C_DISABLE_PM);
1628         return 0;
1629 }
1630
1631 static int pxafb_resume(struct platform_device *dev)
1632 {
1633         struct pxafb_info *fbi = platform_get_drvdata(dev);
1634
1635         set_ctrlr_state(fbi, C_ENABLE_PM);
1636         return 0;
1637 }
1638 #else
1639 #define pxafb_suspend   NULL
1640 #define pxafb_resume    NULL
1641 #endif
1642
1643 static int __devinit pxafb_init_video_memory(struct pxafb_info *fbi)
1644 {
1645         int size = PAGE_ALIGN(fbi->video_mem_size);
1646
1647         fbi->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
1648         if (fbi->video_mem == NULL)
1649                 return -ENOMEM;
1650
1651         fbi->video_mem_phys = virt_to_phys(fbi->video_mem);
1652         fbi->video_mem_size = size;
1653
1654         fbi->fb.fix.smem_start  = fbi->video_mem_phys;
1655         fbi->fb.fix.smem_len    = fbi->video_mem_size;
1656         fbi->fb.screen_base     = fbi->video_mem;
1657
1658         return fbi->video_mem ? 0 : -ENOMEM;
1659 }
1660
1661 static void pxafb_decode_mach_info(struct pxafb_info *fbi,
1662                                    struct pxafb_mach_info *inf)
1663 {
1664         unsigned int lcd_conn = inf->lcd_conn;
1665         struct pxafb_mode_info *m;
1666         int i;
1667
1668         fbi->cmap_inverse       = inf->cmap_inverse;
1669         fbi->cmap_static        = inf->cmap_static;
1670         fbi->lccr4              = inf->lccr4;
1671
1672         switch (lcd_conn & LCD_TYPE_MASK) {
1673         case LCD_TYPE_MONO_STN:
1674                 fbi->lccr0 = LCCR0_CMS;
1675                 break;
1676         case LCD_TYPE_MONO_DSTN:
1677                 fbi->lccr0 = LCCR0_CMS | LCCR0_SDS;
1678                 break;
1679         case LCD_TYPE_COLOR_STN:
1680                 fbi->lccr0 = 0;
1681                 break;
1682         case LCD_TYPE_COLOR_DSTN:
1683                 fbi->lccr0 = LCCR0_SDS;
1684                 break;
1685         case LCD_TYPE_COLOR_TFT:
1686                 fbi->lccr0 = LCCR0_PAS;
1687                 break;
1688         case LCD_TYPE_SMART_PANEL:
1689                 fbi->lccr0 = LCCR0_LCDT | LCCR0_PAS;
1690                 break;
1691         default:
1692                 /* fall back to backward compatibility way */
1693                 fbi->lccr0 = inf->lccr0;
1694                 fbi->lccr3 = inf->lccr3;
1695                 goto decode_mode;
1696         }
1697
1698         if (lcd_conn == LCD_MONO_STN_8BPP)
1699                 fbi->lccr0 |= LCCR0_DPD;
1700
1701         fbi->lccr0 |= (lcd_conn & LCD_ALTERNATE_MAPPING) ? LCCR0_LDDALT : 0;
1702
1703         fbi->lccr3 = LCCR3_Acb((inf->lcd_conn >> 10) & 0xff);
1704         fbi->lccr3 |= (lcd_conn & LCD_BIAS_ACTIVE_LOW) ? LCCR3_OEP : 0;
1705         fbi->lccr3 |= (lcd_conn & LCD_PCLK_EDGE_FALL)  ? LCCR3_PCP : 0;
1706
1707 decode_mode:
1708         pxafb_setmode(&fbi->fb.var, &inf->modes[0]);
1709
1710         /* decide video memory size as follows:
1711          * 1. default to mode of maximum resolution
1712          * 2. allow platform to override
1713          * 3. allow module parameter to override
1714          */
1715         for (i = 0, m = &inf->modes[0]; i < inf->num_modes; i++, m++)
1716                 fbi->video_mem_size = max_t(size_t, fbi->video_mem_size,
1717                                 m->xres * m->yres * m->bpp / 8);
1718
1719         if (inf->video_mem_size > fbi->video_mem_size)
1720                 fbi->video_mem_size = inf->video_mem_size;
1721
1722         if (video_mem_size > fbi->video_mem_size)
1723                 fbi->video_mem_size = video_mem_size;
1724 }
1725
1726 static struct pxafb_info * __devinit pxafb_init_fbinfo(struct device *dev)
1727 {
1728         struct pxafb_info *fbi;
1729         void *addr;
1730         struct pxafb_mach_info *inf = dev->platform_data;
1731
1732         /* Alloc the pxafb_info and pseudo_palette in one step */
1733         fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 16, GFP_KERNEL);
1734         if (!fbi)
1735                 return NULL;
1736
1737         memset(fbi, 0, sizeof(struct pxafb_info));
1738         fbi->dev = dev;
1739
1740         fbi->clk = clk_get(dev, NULL);
1741         if (IS_ERR(fbi->clk)) {
1742                 kfree(fbi);
1743                 return NULL;
1744         }
1745
1746         strcpy(fbi->fb.fix.id, PXA_NAME);
1747
1748         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1749         fbi->fb.fix.type_aux    = 0;
1750         fbi->fb.fix.xpanstep    = 0;
1751         fbi->fb.fix.ypanstep    = 1;
1752         fbi->fb.fix.ywrapstep   = 0;
1753         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1754
1755         fbi->fb.var.nonstd      = 0;
1756         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1757         fbi->fb.var.height      = -1;
1758         fbi->fb.var.width       = -1;
1759         fbi->fb.var.accel_flags = FB_ACCELF_TEXT;
1760         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1761
1762         fbi->fb.fbops           = &pxafb_ops;
1763         fbi->fb.flags           = FBINFO_DEFAULT;
1764         fbi->fb.node            = -1;
1765
1766         addr = fbi;
1767         addr = addr + sizeof(struct pxafb_info);
1768         fbi->fb.pseudo_palette  = addr;
1769
1770         fbi->state              = C_STARTUP;
1771         fbi->task_state         = (u_char)-1;
1772
1773         pxafb_decode_mach_info(fbi, inf);
1774
1775         init_waitqueue_head(&fbi->ctrlr_wait);
1776         INIT_WORK(&fbi->task, pxafb_task);
1777         mutex_init(&fbi->ctrlr_lock);
1778         init_completion(&fbi->disable_done);
1779
1780         return fbi;
1781 }
1782
1783 #ifdef CONFIG_FB_PXA_PARAMETERS
1784 static int __devinit parse_opt_mode(struct device *dev, const char *this_opt)
1785 {
1786         struct pxafb_mach_info *inf = dev->platform_data;
1787
1788         const char *name = this_opt+5;
1789         unsigned int namelen = strlen(name);
1790         int res_specified = 0, bpp_specified = 0;
1791         unsigned int xres = 0, yres = 0, bpp = 0;
1792         int yres_specified = 0;
1793         int i;
1794         for (i = namelen-1; i >= 0; i--) {
1795                 switch (name[i]) {
1796                 case '-':
1797                         namelen = i;
1798                         if (!bpp_specified && !yres_specified) {
1799                                 bpp = simple_strtoul(&name[i+1], NULL, 0);
1800                                 bpp_specified = 1;
1801                         } else
1802                                 goto done;
1803                         break;
1804                 case 'x':
1805                         if (!yres_specified) {
1806                                 yres = simple_strtoul(&name[i+1], NULL, 0);
1807                                 yres_specified = 1;
1808                         } else
1809                                 goto done;
1810                         break;
1811                 case '0' ... '9':
1812                         break;
1813                 default:
1814                         goto done;
1815                 }
1816         }
1817         if (i < 0 && yres_specified) {
1818                 xres = simple_strtoul(name, NULL, 0);
1819                 res_specified = 1;
1820         }
1821 done:
1822         if (res_specified) {
1823                 dev_info(dev, "overriding resolution: %dx%d\n", xres, yres);
1824                 inf->modes[0].xres = xres; inf->modes[0].yres = yres;
1825         }
1826         if (bpp_specified)
1827                 switch (bpp) {
1828                 case 1:
1829                 case 2:
1830                 case 4:
1831                 case 8:
1832                 case 16:
1833                         inf->modes[0].bpp = bpp;
1834                         dev_info(dev, "overriding bit depth: %d\n", bpp);
1835                         break;
1836                 default:
1837                         dev_err(dev, "Depth %d is not valid\n", bpp);
1838                         return -EINVAL;
1839                 }
1840         return 0;
1841 }
1842
1843 static int __devinit parse_opt(struct device *dev, char *this_opt)
1844 {
1845         struct pxafb_mach_info *inf = dev->platform_data;
1846         struct pxafb_mode_info *mode = &inf->modes[0];
1847         char s[64];
1848
1849         s[0] = '\0';
1850
1851         if (!strncmp(this_opt, "vmem:", 5)) {
1852                 video_mem_size = memparse(this_opt + 5, NULL);
1853         } else if (!strncmp(this_opt, "mode:", 5)) {
1854                 return parse_opt_mode(dev, this_opt);
1855         } else if (!strncmp(this_opt, "pixclock:", 9)) {
1856                 mode->pixclock = simple_strtoul(this_opt+9, NULL, 0);
1857                 sprintf(s, "pixclock: %ld\n", mode->pixclock);
1858         } else if (!strncmp(this_opt, "left:", 5)) {
1859                 mode->left_margin = simple_strtoul(this_opt+5, NULL, 0);
1860                 sprintf(s, "left: %u\n", mode->left_margin);
1861         } else if (!strncmp(this_opt, "right:", 6)) {
1862                 mode->right_margin = simple_strtoul(this_opt+6, NULL, 0);
1863                 sprintf(s, "right: %u\n", mode->right_margin);
1864         } else if (!strncmp(this_opt, "upper:", 6)) {
1865                 mode->upper_margin = simple_strtoul(this_opt+6, NULL, 0);
1866                 sprintf(s, "upper: %u\n", mode->upper_margin);
1867         } else if (!strncmp(this_opt, "lower:", 6)) {
1868                 mode->lower_margin = simple_strtoul(this_opt+6, NULL, 0);
1869                 sprintf(s, "lower: %u\n", mode->lower_margin);
1870         } else if (!strncmp(this_opt, "hsynclen:", 9)) {
1871                 mode->hsync_len = simple_strtoul(this_opt+9, NULL, 0);
1872                 sprintf(s, "hsynclen: %u\n", mode->hsync_len);
1873         } else if (!strncmp(this_opt, "vsynclen:", 9)) {
1874                 mode->vsync_len = simple_strtoul(this_opt+9, NULL, 0);
1875                 sprintf(s, "vsynclen: %u\n", mode->vsync_len);
1876         } else if (!strncmp(this_opt, "hsync:", 6)) {
1877                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1878                         sprintf(s, "hsync: Active Low\n");
1879                         mode->sync &= ~FB_SYNC_HOR_HIGH_ACT;
1880                 } else {
1881                         sprintf(s, "hsync: Active High\n");
1882                         mode->sync |= FB_SYNC_HOR_HIGH_ACT;
1883                 }
1884         } else if (!strncmp(this_opt, "vsync:", 6)) {
1885                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1886                         sprintf(s, "vsync: Active Low\n");
1887                         mode->sync &= ~FB_SYNC_VERT_HIGH_ACT;
1888                 } else {
1889                         sprintf(s, "vsync: Active High\n");
1890                         mode->sync |= FB_SYNC_VERT_HIGH_ACT;
1891                 }
1892         } else if (!strncmp(this_opt, "dpc:", 4)) {
1893                 if (simple_strtoul(this_opt+4, NULL, 0) == 0) {
1894                         sprintf(s, "double pixel clock: false\n");
1895                         inf->lccr3 &= ~LCCR3_DPC;
1896                 } else {
1897                         sprintf(s, "double pixel clock: true\n");
1898                         inf->lccr3 |= LCCR3_DPC;
1899                 }
1900         } else if (!strncmp(this_opt, "outputen:", 9)) {
1901                 if (simple_strtoul(this_opt+9, NULL, 0) == 0) {
1902                         sprintf(s, "output enable: active low\n");
1903                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL;
1904                 } else {
1905                         sprintf(s, "output enable: active high\n");
1906                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH;
1907                 }
1908         } else if (!strncmp(this_opt, "pixclockpol:", 12)) {
1909                 if (simple_strtoul(this_opt+12, NULL, 0) == 0) {
1910                         sprintf(s, "pixel clock polarity: falling edge\n");
1911                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg;
1912                 } else {
1913                         sprintf(s, "pixel clock polarity: rising edge\n");
1914                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg;
1915                 }
1916         } else if (!strncmp(this_opt, "color", 5)) {
1917                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color;
1918         } else if (!strncmp(this_opt, "mono", 4)) {
1919                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono;
1920         } else if (!strncmp(this_opt, "active", 6)) {
1921                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act;
1922         } else if (!strncmp(this_opt, "passive", 7)) {
1923                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas;
1924         } else if (!strncmp(this_opt, "single", 6)) {
1925                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl;
1926         } else if (!strncmp(this_opt, "dual", 4)) {
1927                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual;
1928         } else if (!strncmp(this_opt, "4pix", 4)) {
1929                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
1930         } else if (!strncmp(this_opt, "8pix", 4)) {
1931                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
1932         } else {
1933                 dev_err(dev, "unknown option: %s\n", this_opt);
1934                 return -EINVAL;
1935         }
1936
1937         if (s[0] != '\0')
1938                 dev_info(dev, "override %s", s);
1939
1940         return 0;
1941 }
1942
1943 static int __devinit pxafb_parse_options(struct device *dev, char *options)
1944 {
1945         char *this_opt;
1946         int ret;
1947
1948         if (!options || !*options)
1949                 return 0;
1950
1951         dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
1952
1953         /* could be made table driven or similar?... */
1954         while ((this_opt = strsep(&options, ",")) != NULL) {
1955                 ret = parse_opt(dev, this_opt);
1956                 if (ret)
1957                         return ret;
1958         }
1959         return 0;
1960 }
1961
1962 static char g_options[256] __devinitdata = "";
1963
1964 #ifndef MODULE
1965 static int __init pxafb_setup_options(void)
1966 {
1967         char *options = NULL;
1968
1969         if (fb_get_options("pxafb", &options))
1970                 return -ENODEV;
1971
1972         if (options)
1973                 strlcpy(g_options, options, sizeof(g_options));
1974
1975         return 0;
1976 }
1977 #else
1978 #define pxafb_setup_options()           (0)
1979
1980 module_param_string(options, g_options, sizeof(g_options), 0);
1981 MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
1982 #endif
1983
1984 #else
1985 #define pxafb_parse_options(...)        (0)
1986 #define pxafb_setup_options()           (0)
1987 #endif
1988
1989 #ifdef DEBUG_VAR
1990 /* Check for various illegal bit-combinations. Currently only
1991  * a warning is given. */
1992 static void __devinit pxafb_check_options(struct device *dev,
1993                                           struct pxafb_mach_info *inf)
1994 {
1995         if (inf->lcd_conn)
1996                 return;
1997
1998         if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK)
1999                 dev_warn(dev, "machine LCCR0 setting contains "
2000                                 "illegal bits: %08x\n",
2001                         inf->lccr0 & LCCR0_INVALID_CONFIG_MASK);
2002         if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK)
2003                 dev_warn(dev, "machine LCCR3 setting contains "
2004                                 "illegal bits: %08x\n",
2005                         inf->lccr3 & LCCR3_INVALID_CONFIG_MASK);
2006         if (inf->lccr0 & LCCR0_DPD &&
2007             ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas ||
2008              (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl ||
2009              (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono))
2010                 dev_warn(dev, "Double Pixel Data (DPD) mode is "
2011                                 "only valid in passive mono"
2012                                 " single panel mode\n");
2013         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act &&
2014             (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual)
2015                 dev_warn(dev, "Dual panel only valid in passive mode\n");
2016         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas &&
2017              (inf->modes->upper_margin || inf->modes->lower_margin))
2018                 dev_warn(dev, "Upper and lower margins must be 0 in "
2019                                 "passive mode\n");
2020 }
2021 #else
2022 #define pxafb_check_options(...)        do {} while (0)
2023 #endif
2024
2025 static int __devinit pxafb_probe(struct platform_device *dev)
2026 {
2027         struct pxafb_info *fbi;
2028         struct pxafb_mach_info *inf;
2029         struct resource *r;
2030         int irq, ret;
2031
2032         dev_dbg(&dev->dev, "pxafb_probe\n");
2033
2034         inf = dev->dev.platform_data;
2035         ret = -ENOMEM;
2036         fbi = NULL;
2037         if (!inf)
2038                 goto failed;
2039
2040         ret = pxafb_parse_options(&dev->dev, g_options);
2041         if (ret < 0)
2042                 goto failed;
2043
2044         pxafb_check_options(&dev->dev, inf);
2045
2046         dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n",
2047                         inf->modes->xres,
2048                         inf->modes->yres,
2049                         inf->modes->bpp);
2050         if (inf->modes->xres == 0 ||
2051             inf->modes->yres == 0 ||
2052             inf->modes->bpp == 0) {
2053                 dev_err(&dev->dev, "Invalid resolution or bit depth\n");
2054                 ret = -EINVAL;
2055                 goto failed;
2056         }
2057
2058         fbi = pxafb_init_fbinfo(&dev->dev);
2059         if (!fbi) {
2060                 /* only reason for pxafb_init_fbinfo to fail is kmalloc */
2061                 dev_err(&dev->dev, "Failed to initialize framebuffer device\n");
2062                 ret = -ENOMEM;
2063                 goto failed;
2064         }
2065
2066         fbi->backlight_power = inf->pxafb_backlight_power;
2067         fbi->lcd_power = inf->pxafb_lcd_power;
2068
2069         r = platform_get_resource(dev, IORESOURCE_MEM, 0);
2070         if (r == NULL) {
2071                 dev_err(&dev->dev, "no I/O memory resource defined\n");
2072                 ret = -ENODEV;
2073                 goto failed_fbi;
2074         }
2075
2076         r = request_mem_region(r->start, r->end - r->start + 1, dev->name);
2077         if (r == NULL) {
2078                 dev_err(&dev->dev, "failed to request I/O memory\n");
2079                 ret = -EBUSY;
2080                 goto failed_fbi;
2081         }
2082
2083         fbi->mmio_base = ioremap(r->start, r->end - r->start + 1);
2084         if (fbi->mmio_base == NULL) {
2085                 dev_err(&dev->dev, "failed to map I/O memory\n");
2086                 ret = -EBUSY;
2087                 goto failed_free_res;
2088         }
2089
2090         fbi->dma_buff_size = PAGE_ALIGN(sizeof(struct pxafb_dma_buff));
2091         fbi->dma_buff = dma_alloc_coherent(fbi->dev, fbi->dma_buff_size,
2092                                 &fbi->dma_buff_phys, GFP_KERNEL);
2093         if (fbi->dma_buff == NULL) {
2094                 dev_err(&dev->dev, "failed to allocate memory for DMA\n");
2095                 ret = -ENOMEM;
2096                 goto failed_free_io;
2097         }
2098
2099         ret = pxafb_init_video_memory(fbi);
2100         if (ret) {
2101                 dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret);
2102                 ret = -ENOMEM;
2103                 goto failed_free_dma;
2104         }
2105
2106         irq = platform_get_irq(dev, 0);
2107         if (irq < 0) {
2108                 dev_err(&dev->dev, "no IRQ defined\n");
2109                 ret = -ENODEV;
2110                 goto failed_free_mem;
2111         }
2112
2113         ret = request_irq(irq, pxafb_handle_irq, IRQF_DISABLED, "LCD", fbi);
2114         if (ret) {
2115                 dev_err(&dev->dev, "request_irq failed: %d\n", ret);
2116                 ret = -EBUSY;
2117                 goto failed_free_mem;
2118         }
2119
2120         ret = pxafb_smart_init(fbi);
2121         if (ret) {
2122                 dev_err(&dev->dev, "failed to initialize smartpanel\n");
2123                 goto failed_free_irq;
2124         }
2125
2126         /*
2127          * This makes sure that our colour bitfield
2128          * descriptors are correctly initialised.
2129          */
2130         ret = pxafb_check_var(&fbi->fb.var, &fbi->fb);
2131         if (ret) {
2132                 dev_err(&dev->dev, "failed to get suitable mode\n");
2133                 goto failed_free_irq;
2134         }
2135
2136         ret = pxafb_set_par(&fbi->fb);
2137         if (ret) {
2138                 dev_err(&dev->dev, "Failed to set parameters\n");
2139                 goto failed_free_irq;
2140         }
2141
2142         platform_set_drvdata(dev, fbi);
2143
2144         ret = register_framebuffer(&fbi->fb);
2145         if (ret < 0) {
2146                 dev_err(&dev->dev,
2147                         "Failed to register framebuffer device: %d\n", ret);
2148                 goto failed_free_cmap;
2149         }
2150
2151         pxafb_overlay_init(fbi);
2152
2153 #ifdef CONFIG_CPU_FREQ
2154         fbi->freq_transition.notifier_call = pxafb_freq_transition;
2155         fbi->freq_policy.notifier_call = pxafb_freq_policy;
2156         cpufreq_register_notifier(&fbi->freq_transition,
2157                                 CPUFREQ_TRANSITION_NOTIFIER);
2158         cpufreq_register_notifier(&fbi->freq_policy,
2159                                 CPUFREQ_POLICY_NOTIFIER);
2160 #endif
2161
2162         /*
2163          * Ok, now enable the LCD controller
2164          */
2165         set_ctrlr_state(fbi, C_ENABLE);
2166
2167         return 0;
2168
2169 failed_free_cmap:
2170         if (fbi->fb.cmap.len)
2171                 fb_dealloc_cmap(&fbi->fb.cmap);
2172 failed_free_irq:
2173         free_irq(irq, fbi);
2174 failed_free_mem:
2175         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2176 failed_free_dma:
2177         dma_free_coherent(&dev->dev, fbi->dma_buff_size,
2178                         fbi->dma_buff, fbi->dma_buff_phys);
2179 failed_free_io:
2180         iounmap(fbi->mmio_base);
2181 failed_free_res:
2182         release_mem_region(r->start, r->end - r->start + 1);
2183 failed_fbi:
2184         clk_put(fbi->clk);
2185         platform_set_drvdata(dev, NULL);
2186         kfree(fbi);
2187 failed:
2188         return ret;
2189 }
2190
2191 static int __devexit pxafb_remove(struct platform_device *dev)
2192 {
2193         struct pxafb_info *fbi = platform_get_drvdata(dev);
2194         struct resource *r;
2195         int irq;
2196         struct fb_info *info;
2197
2198         if (!fbi)
2199                 return 0;
2200
2201         info = &fbi->fb;
2202
2203         pxafb_overlay_exit(fbi);
2204         unregister_framebuffer(info);
2205
2206         pxafb_disable_controller(fbi);
2207
2208         if (fbi->fb.cmap.len)
2209                 fb_dealloc_cmap(&fbi->fb.cmap);
2210
2211         irq = platform_get_irq(dev, 0);
2212         free_irq(irq, fbi);
2213
2214         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2215
2216         dma_free_writecombine(&dev->dev, fbi->dma_buff_size,
2217                         fbi->dma_buff, fbi->dma_buff_phys);
2218
2219         iounmap(fbi->mmio_base);
2220
2221         r = platform_get_resource(dev, IORESOURCE_MEM, 0);
2222         release_mem_region(r->start, r->end - r->start + 1);
2223
2224         clk_put(fbi->clk);
2225         kfree(fbi);
2226
2227         return 0;
2228 }
2229
2230 static struct platform_driver pxafb_driver = {
2231         .probe          = pxafb_probe,
2232         .remove         = __devexit_p(pxafb_remove),
2233         .suspend        = pxafb_suspend,
2234         .resume         = pxafb_resume,
2235         .driver         = {
2236                 .owner  = THIS_MODULE,
2237                 .name   = "pxa2xx-fb",
2238         },
2239 };
2240
2241 static int __init pxafb_init(void)
2242 {
2243         if (pxafb_setup_options())
2244                 return -EINVAL;
2245
2246         return platform_driver_register(&pxafb_driver);
2247 }
2248
2249 static void __exit pxafb_exit(void)
2250 {
2251         platform_driver_unregister(&pxafb_driver);
2252 }
2253
2254 module_init(pxafb_init);
2255 module_exit(pxafb_exit);
2256
2257 MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
2258 MODULE_LICENSE("GPL");