drivers/video/fbdev/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 #include <linux/console.h>
  58 #include <linux/of_graph.h>
  59 #include <linux/regulator/consumer.h>
  60 #include <video/of_display_timing.h>
  61 #include <video/videomode.h>
  62
  63 #include <mach/hardware.h>
  64 #include <asm/io.h>
  65 #include <asm/irq.h>
  66 #include <asm/div64.h>
  67 #include <mach/bitfield.h>
  68 #include <linux/platform_data/video-pxafb.h>
  69
  70 /*
  71  * Complain if VAR is out of range.
  72  */
  73 #define DEBUG_VAR 1
  74
  75 #include "pxafb.h"
  76
  77 /* Bits which should not be set in machine configuration structures */
  78 #define LCCR0_INVALID_CONFIG_MASK       (LCCR0_OUM | LCCR0_BM | LCCR0_QDM |\
  79                                          LCCR0_DIS | LCCR0_EFM | LCCR0_IUM |\
  80                                          LCCR0_SFM | LCCR0_LDM | LCCR0_ENB)
  81
  82 #define LCCR3_INVALID_CONFIG_MASK       (LCCR3_HSP | LCCR3_VSP |\
  83                                          LCCR3_PCD | LCCR3_BPP(0xf))
  84
  85 static int pxafb_activate_var(struct fb_var_screeninfo *var,
  86                                 struct pxafb_info *);
  87 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state);
  88 static void setup_base_frame(struct pxafb_info *fbi,
  89                              struct fb_var_screeninfo *var, int branch);
  90 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
  91                            unsigned long offset, size_t size);
  92
  93 static unsigned long video_mem_size = 0;
  94
  95 static inline unsigned long
  96 lcd_readl(struct pxafb_info *fbi, unsigned int off)
  97 {
  98         return __raw_readl(fbi->mmio_base + off);
  99 }
 100
 101 static inline void
 102 lcd_writel(struct pxafb_info *fbi, unsigned int off, unsigned long val)
 103 {
 104         __raw_writel(val, fbi->mmio_base + off);
 105 }
 106
 107 static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state)
 108 {
 109         unsigned long flags;
 110
 111         local_irq_save(flags);
 112         /*
 113          * We need to handle two requests being made at the same time.
 114          * There are two important cases:
 115          *  1. When we are changing VT (C_REENABLE) while unblanking
 116          *     (C_ENABLE) We must perform the unblanking, which will
 117          *     do our REENABLE for us.
 118          *  2. When we are blanking, but immediately unblank before
 119          *     we have blanked.  We do the "REENABLE" thing here as
 120          *     well, just to be sure.
 121          */
 122         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
 123                 state = (u_int) -1;
 124         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
 125                 state = C_REENABLE;
 126
 127         if (state != (u_int)-1) {
 128                 fbi->task_state = state;
 129                 schedule_work(&fbi->task);
 130         }
 131         local_irq_restore(flags);
 132 }
 133
 134 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 135 {
 136         chan &= 0xffff;
 137         chan >>= 16 - bf->length;
 138         return chan << bf->offset;
 139 }
 140
 141 static int
 142 pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
 143                        u_int trans, struct fb_info *info)
 144 {
 145         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 146         u_int val;
 147
 148         if (regno >= fbi->palette_size)
 149                 return 1;
 150
 151         if (fbi->fb.var.grayscale) {
 152                 fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff);
 153                 return 0;
 154         }
 155
 156         switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) {
 157         case LCCR4_PAL_FOR_0:
 158                 val  = ((red   >>  0) & 0xf800);
 159                 val |= ((green >>  5) & 0x07e0);
 160                 val |= ((blue  >> 11) & 0x001f);
 161                 fbi->palette_cpu[regno] = val;
 162                 break;
 163         case LCCR4_PAL_FOR_1:
 164                 val  = ((red   << 8) & 0x00f80000);
 165                 val |= ((green >> 0) & 0x0000fc00);
 166                 val |= ((blue  >> 8) & 0x000000f8);
 167                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 168                 break;
 169         case LCCR4_PAL_FOR_2:
 170                 val  = ((red   << 8) & 0x00fc0000);
 171                 val |= ((green >> 0) & 0x0000fc00);
 172                 val |= ((blue  >> 8) & 0x000000fc);
 173                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 174                 break;
 175         case LCCR4_PAL_FOR_3:
 176                 val  = ((red   << 8) & 0x00ff0000);
 177                 val |= ((green >> 0) & 0x0000ff00);
 178                 val |= ((blue  >> 8) & 0x000000ff);
 179                 ((u32 *)(fbi->palette_cpu))[regno] = val;
 180                 break;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static int
 187 pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 188                    u_int trans, struct fb_info *info)
 189 {
 190         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 191         unsigned int val;
 192         int ret = 1;
 193
 194         /*
 195          * If inverse mode was selected, invert all the colours
 196          * rather than the register number.  The register number
 197          * is what you poke into the framebuffer to produce the
 198          * colour you requested.
 199          */
 200         if (fbi->cmap_inverse) {
 201                 red   = 0xffff - red;
 202                 green = 0xffff - green;
 203                 blue  = 0xffff - blue;
 204         }
 205
 206         /*
 207          * If greyscale is true, then we convert the RGB value
 208          * to greyscale no matter what visual we are using.
 209          */
 210         if (fbi->fb.var.grayscale)
 211                 red = green = blue = (19595 * red + 38470 * green +
 212                                         7471 * blue) >> 16;
 213
 214         switch (fbi->fb.fix.visual) {
 215         case FB_VISUAL_TRUECOLOR:
 216                 /*
 217                  * 16-bit True Colour.  We encode the RGB value
 218                  * according to the RGB bitfield information.
 219                  */
 220                 if (regno < 16) {
 221                         u32 *pal = fbi->fb.pseudo_palette;
 222
 223                         val  = chan_to_field(red, &fbi->fb.var.red);
 224                         val |= chan_to_field(green, &fbi->fb.var.green);
 225                         val |= chan_to_field(blue, &fbi->fb.var.blue);
 226
 227                         pal[regno] = val;
 228                         ret = 0;
 229                 }
 230                 break;
 231
 232         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 233         case FB_VISUAL_PSEUDOCOLOR:
 234                 ret = pxafb_setpalettereg(regno, red, green, blue, trans, info);
 235                 break;
 236         }
 237
 238         return ret;
 239 }
 240
 241 /* calculate pixel depth, transparency bit included, >=16bpp formats _only_ */
 242 static inline int var_to_depth(struct fb_var_screeninfo *var)
 243 {
 244         return var->red.length + var->green.length +
 245                 var->blue.length + var->transp.length;
 246 }
 247
 248 /* calculate 4-bit BPP value for LCCR3 and OVLxC1 */
 249 static int pxafb_var_to_bpp(struct fb_var_screeninfo *var)
 250 {
 251         int bpp = -EINVAL;
 252
 253         switch (var->bits_per_pixel) {
 254         case 1:  bpp = 0; break;
 255         case 2:  bpp = 1; break;
 256         case 4:  bpp = 2; break;
 257         case 8:  bpp = 3; break;
 258         case 16: bpp = 4; break;
 259         case 24:
 260                 switch (var_to_depth(var)) {
 261                 case 18: bpp = 6; break; /* 18-bits/pixel packed */
 262                 case 19: bpp = 8; break; /* 19-bits/pixel packed */
 263                 case 24: bpp = 9; break;
 264                 }
 265                 break;
 266         case 32:
 267                 switch (var_to_depth(var)) {
 268                 case 18: bpp = 5; break; /* 18-bits/pixel unpacked */
 269                 case 19: bpp = 7; break; /* 19-bits/pixel unpacked */
 270                 case 25: bpp = 10; break;
 271                 }
 272                 break;
 273         }
 274         return bpp;
 275 }
 276
 277 /*
 278  *  pxafb_var_to_lccr3():
 279  *    Convert a bits per pixel value to the correct bit pattern for LCCR3
 280  *
 281  *  NOTE: for PXA27x with overlays support, the LCCR3_PDFOR_x bits have an
 282  *  implication of the acutal use of transparency bit,  which we handle it
 283  *  here separatedly. See PXA27x Developer's Manual, Section <<7.4.6 Pixel
 284  *  Formats>> for the valid combination of PDFOR, PAL_FOR for various BPP.
 285  *
 286  *  Transparency for palette pixel formats is not supported at the moment.
 287  */
 288 static uint32_t pxafb_var_to_lccr3(struct fb_var_screeninfo *var)
 289 {
 290         int bpp = pxafb_var_to_bpp(var);
 291         uint32_t lccr3;
 292
 293         if (bpp < 0)
 294                 return 0;
 295
 296         lccr3 = LCCR3_BPP(bpp);
 297
 298         switch (var_to_depth(var)) {
 299         case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break;
 300         case 18: lccr3 |= LCCR3_PDFOR_3; break;
 301         case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3;
 302                  break;
 303         case 19:
 304         case 25: lccr3 |= LCCR3_PDFOR_0; break;
 305         }
 306         return lccr3;
 307 }
 308
 309 #define SET_PIXFMT(v, r, g, b, t)                               \
 310 ({                                                              \
 311         (v)->transp.offset = (t) ? (r) + (g) + (b) : 0;         \
 312         (v)->transp.length = (t) ? (t) : 0;                     \
 313         (v)->blue.length   = (b); (v)->blue.offset = 0;         \
 314         (v)->green.length  = (g); (v)->green.offset = (b);      \
 315         (v)->red.length    = (r); (v)->red.offset = (b) + (g);  \
 316 })
 317
 318 /* set the RGBT bitfields of fb_var_screeninf according to
 319  * var->bits_per_pixel and given depth
 320  */
 321 static void pxafb_set_pixfmt(struct fb_var_screeninfo *var, int depth)
 322 {
 323         if (depth == 0)
 324                 depth = var->bits_per_pixel;
 325
 326         if (var->bits_per_pixel < 16) {
 327                 /* indexed pixel formats */
 328                 var->red.offset    = 0; var->red.length    = 8;
 329                 var->green.offset  = 0; var->green.length  = 8;
 330                 var->blue.offset   = 0; var->blue.length   = 8;
 331                 var->transp.offset = 0; var->transp.length = 8;
 332         }
 333
 334         switch (depth) {
 335         case 16: var->transp.length ?
 336                  SET_PIXFMT(var, 5, 5, 5, 1) :          /* RGBT555 */
 337                  SET_PIXFMT(var, 5, 6, 5, 0); break;    /* RGB565 */
 338         case 18: SET_PIXFMT(var, 6, 6, 6, 0); break;    /* RGB666 */
 339         case 19: SET_PIXFMT(var, 6, 6, 6, 1); break;    /* RGBT666 */
 340         case 24: var->transp.length ?
 341                  SET_PIXFMT(var, 8, 8, 7, 1) :          /* RGBT887 */
 342                  SET_PIXFMT(var, 8, 8, 8, 0); break;    /* RGB888 */
 343         case 25: SET_PIXFMT(var, 8, 8, 8, 1); break;    /* RGBT888 */
 344         }
 345 }
 346
 347 #ifdef CONFIG_CPU_FREQ
 348 /*
 349  *  pxafb_display_dma_period()
 350  *    Calculate the minimum period (in picoseconds) between two DMA
 351  *    requests for the LCD controller.  If we hit this, it means we're
 352  *    doing nothing but LCD DMA.
 353  */
 354 static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
 355 {
 356         /*
 357          * Period = pixclock * bits_per_byte * bytes_per_transfer
 358          *              / memory_bits_per_pixel;
 359          */
 360         return var->pixclock * 8 * 16 / var->bits_per_pixel;
 361 }
 362 #endif
 363
 364 /*
 365  * Select the smallest mode that allows the desired resolution to be
 366  * displayed. If desired parameters can be rounded up.
 367  */
 368 static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach,
 369                                              struct fb_var_screeninfo *var)
 370 {
 371         struct pxafb_mode_info *mode = NULL;
 372         struct pxafb_mode_info *modelist = mach->modes;
 373         unsigned int best_x = 0xffffffff, best_y = 0xffffffff;
 374         unsigned int i;
 375
 376         for (i = 0; i < mach->num_modes; i++) {
 377                 if (modelist[i].xres >= var->xres &&
 378                     modelist[i].yres >= var->yres &&
 379                     modelist[i].xres < best_x &&
 380                     modelist[i].yres < best_y &&
 381                     modelist[i].bpp >= var->bits_per_pixel) {
 382                         best_x = modelist[i].xres;
 383                         best_y = modelist[i].yres;
 384                         mode = &modelist[i];
 385                 }
 386         }
 387
 388         return mode;
 389 }
 390
 391 static void pxafb_setmode(struct fb_var_screeninfo *var,
 392                           struct pxafb_mode_info *mode)
 393 {
 394         var->xres               = mode->xres;
 395         var->yres               = mode->yres;
 396         var->bits_per_pixel     = mode->bpp;
 397         var->pixclock           = mode->pixclock;
 398         var->hsync_len          = mode->hsync_len;
 399         var->left_margin        = mode->left_margin;
 400         var->right_margin       = mode->right_margin;
 401         var->vsync_len          = mode->vsync_len;
 402         var->upper_margin       = mode->upper_margin;
 403         var->lower_margin       = mode->lower_margin;
 404         var->sync               = mode->sync;
 405         var->grayscale          = mode->cmap_greyscale;
 406         var->transp.length      = mode->transparency;
 407
 408         /* set the initial RGBA bitfields */
 409         pxafb_set_pixfmt(var, mode->depth);
 410 }
 411
 412 static int pxafb_adjust_timing(struct pxafb_info *fbi,
 413                                struct fb_var_screeninfo *var)
 414 {
 415         int line_length;
 416
 417         var->xres = max_t(int, var->xres, MIN_XRES);
 418         var->yres = max_t(int, var->yres, MIN_YRES);
 419
 420         if (!(fbi->lccr0 & LCCR0_LCDT)) {
 421                 clamp_val(var->hsync_len, 1, 64);
 422                 clamp_val(var->vsync_len, 1, 64);
 423                 clamp_val(var->left_margin,  1, 255);
 424                 clamp_val(var->right_margin, 1, 255);
 425                 clamp_val(var->upper_margin, 1, 255);
 426                 clamp_val(var->lower_margin, 1, 255);
 427         }
 428
 429         /* make sure each line is aligned on word boundary */
 430         line_length = var->xres * var->bits_per_pixel / 8;
 431         line_length = ALIGN(line_length, 4);
 432         var->xres = line_length * 8 / var->bits_per_pixel;
 433
 434         /* we don't support xpan, force xres_virtual to be equal to xres */
 435         var->xres_virtual = var->xres;
 436
 437         if (var->accel_flags & FB_ACCELF_TEXT)
 438                 var->yres_virtual = fbi->fb.fix.smem_len / line_length;
 439         else
 440                 var->yres_virtual = max(var->yres_virtual, var->yres);
 441
 442         /* check for limits */
 443         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
 444                 return -EINVAL;
 445
 446         if (var->yres > var->yres_virtual)
 447                 return -EINVAL;
 448
 449         return 0;
 450 }
 451
 452 /*
 453  *  pxafb_check_var():
 454  *    Get the video params out of 'var'. If a value doesn't fit, round it up,
 455  *    if it's too big, return -EINVAL.
 456  *
 457  *    Round up in the following order: bits_per_pixel, xres,
 458  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 459  *    bitfields, horizontal timing, vertical timing.
 460  */
 461 static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 462 {
 463         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 464         struct pxafb_mach_info *inf = fbi->inf;
 465         int err;
 466
 467         if (inf->fixed_modes) {
 468                 struct pxafb_mode_info *mode;
 469
 470                 mode = pxafb_getmode(inf, var);
 471                 if (!mode)
 472                         return -EINVAL;
 473                 pxafb_setmode(var, mode);
 474         }
 475
 476         /* do a test conversion to BPP fields to check the color formats */
 477         err = pxafb_var_to_bpp(var);
 478         if (err < 0)
 479                 return err;
 480
 481         pxafb_set_pixfmt(var, var_to_depth(var));
 482
 483         err = pxafb_adjust_timing(fbi, var);
 484         if (err)
 485                 return err;
 486
 487 #ifdef CONFIG_CPU_FREQ
 488         pr_debug("pxafb: dma period = %d ps\n",
 489                  pxafb_display_dma_period(var));
 490 #endif
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * pxafb_set_par():
 497  *      Set the user defined part of the display for the specified console
 498  */
 499 static int pxafb_set_par(struct fb_info *info)
 500 {
 501         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 502         struct fb_var_screeninfo *var = &info->var;
 503
 504         if (var->bits_per_pixel >= 16)
 505                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 506         else if (!fbi->cmap_static)
 507                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
 508         else {
 509                 /*
 510                  * Some people have weird ideas about wanting static
 511                  * pseudocolor maps.  I suspect their user space
 512                  * applications are broken.
 513                  */
 514                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 515         }
 516
 517         fbi->fb.fix.line_length = var->xres_virtual *
 518                                   var->bits_per_pixel / 8;
 519         if (var->bits_per_pixel >= 16)
 520                 fbi->palette_size = 0;
 521         else
 522                 fbi->palette_size = var->bits_per_pixel == 1 ?
 523                                         4 : 1 << var->bits_per_pixel;
 524
 525         fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
 526
 527         if (fbi->fb.var.bits_per_pixel >= 16)
 528                 fb_dealloc_cmap(&fbi->fb.cmap);
 529         else
 530                 fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0);
 531
 532         pxafb_activate_var(var, fbi);
 533
 534         return 0;
 535 }
 536
 537 static int pxafb_pan_display(struct fb_var_screeninfo *var,
 538                              struct fb_info *info)
 539 {
 540         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 541         struct fb_var_screeninfo newvar;
 542         int dma = DMA_MAX + DMA_BASE;
 543
 544         if (fbi->state != C_ENABLE)
 545                 return 0;
 546
 547         /* Only take .xoffset, .yoffset and .vmode & FB_VMODE_YWRAP from what
 548          * was passed in and copy the rest from the old screeninfo.
 549          */
 550         memcpy(&newvar, &fbi->fb.var, sizeof(newvar));
 551         newvar.xoffset = var->xoffset;
 552         newvar.yoffset = var->yoffset;
 553         newvar.vmode &= ~FB_VMODE_YWRAP;
 554         newvar.vmode |= var->vmode & FB_VMODE_YWRAP;
 555
 556         setup_base_frame(fbi, &newvar, 1);
 557
 558         if (fbi->lccr0 & LCCR0_SDS)
 559                 lcd_writel(fbi, FBR1, fbi->fdadr[dma + 1] | 0x1);
 560
 561         lcd_writel(fbi, FBR0, fbi->fdadr[dma] | 0x1);
 562         return 0;
 563 }
 564
 565 /*
 566  * pxafb_blank():
 567  *      Blank the display by setting all palette values to zero.  Note, the
 568  *      16 bpp mode does not really use the palette, so this will not
 569  *      blank the display in all modes.
 570  */
 571 static int pxafb_blank(int blank, struct fb_info *info)
 572 {
 573         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
 574         int i;
 575
 576         switch (blank) {
 577         case FB_BLANK_POWERDOWN:
 578         case FB_BLANK_VSYNC_SUSPEND:
 579         case FB_BLANK_HSYNC_SUSPEND:
 580         case FB_BLANK_NORMAL:
 581                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 582                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 583                         for (i = 0; i < fbi->palette_size; i++)
 584                                 pxafb_setpalettereg(i, 0, 0, 0, 0, info);
 585
 586                 pxafb_schedule_work(fbi, C_DISABLE);
 587                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
 588                 break;
 589
 590         case FB_BLANK_UNBLANK:
 591                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
 592                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 593                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 594                         fb_set_cmap(&fbi->fb.cmap, info);
 595                 pxafb_schedule_work(fbi, C_ENABLE);
 596         }
 597         return 0;
 598 }
 599
 600 static const struct fb_ops pxafb_ops = {
 601         .owner          = THIS_MODULE,
 602         .fb_check_var   = pxafb_check_var,
 603         .fb_set_par     = pxafb_set_par,
 604         .fb_pan_display = pxafb_pan_display,
 605         .fb_setcolreg   = pxafb_setcolreg,
 606         .fb_fillrect    = cfb_fillrect,
 607         .fb_copyarea    = cfb_copyarea,
 608         .fb_imageblit   = cfb_imageblit,
 609         .fb_blank       = pxafb_blank,
 610 };
 611
 612 #ifdef CONFIG_FB_PXA_OVERLAY
 613 static void overlay1fb_setup(struct pxafb_layer *ofb)
 614 {
 615         int size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
 616         unsigned long start = ofb->video_mem_phys;
 617         setup_frame_dma(ofb->fbi, DMA_OV1, PAL_NONE, start, size);
 618 }
 619
 620 /* Depending on the enable status of overlay1/2, the DMA should be
 621  * updated from FDADRx (when disabled) or FBRx (when enabled).
 622  */
 623 static void overlay1fb_enable(struct pxafb_layer *ofb)
 624 {
 625         int enabled = lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN;
 626         uint32_t fdadr1 = ofb->fbi->fdadr[DMA_OV1] | (enabled ? 0x1 : 0);
 627
 628         lcd_writel(ofb->fbi, enabled ? FBR1 : FDADR1, fdadr1);
 629         lcd_writel(ofb->fbi, OVL1C2, ofb->control[1]);
 630         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] | OVLxC1_OEN);
 631 }
 632
 633 static void overlay1fb_disable(struct pxafb_layer *ofb)
 634 {
 635         uint32_t lccr5;
 636
 637         if (!(lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN))
 638                 return;
 639
 640         lccr5 = lcd_readl(ofb->fbi, LCCR5);
 641
 642         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] & ~OVLxC1_OEN);
 643
 644         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(1));
 645         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(1));
 646         lcd_writel(ofb->fbi, FBR1, ofb->fbi->fdadr[DMA_OV1] | 0x3);
 647
 648         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
 649                 pr_warn("%s: timeout disabling overlay1\n", __func__);
 650
 651         lcd_writel(ofb->fbi, LCCR5, lccr5);
 652 }
 653
 654 static void overlay2fb_setup(struct pxafb_layer *ofb)
 655 {
 656         int size, div = 1, pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
 657         unsigned long start[3] = { ofb->video_mem_phys, 0, 0 };
 658
 659         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED) {
 660                 size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
 661                 setup_frame_dma(ofb->fbi, DMA_OV2_Y, -1, start[0], size);
 662         } else {
 663                 size = ofb->fb.var.xres_virtual * ofb->fb.var.yres_virtual;
 664                 switch (pfor) {
 665                 case OVERLAY_FORMAT_YUV444_PLANAR: div = 1; break;
 666                 case OVERLAY_FORMAT_YUV422_PLANAR: div = 2; break;
 667                 case OVERLAY_FORMAT_YUV420_PLANAR: div = 4; break;
 668                 }
 669                 start[1] = start[0] + size;
 670                 start[2] = start[1] + size / div;
 671                 setup_frame_dma(ofb->fbi, DMA_OV2_Y,  -1, start[0], size);
 672                 setup_frame_dma(ofb->fbi, DMA_OV2_Cb, -1, start[1], size / div);
 673                 setup_frame_dma(ofb->fbi, DMA_OV2_Cr, -1, start[2], size / div);
 674         }
 675 }
 676
 677 static void overlay2fb_enable(struct pxafb_layer *ofb)
 678 {
 679         int pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
 680         int enabled = lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN;
 681         uint32_t fdadr2 = ofb->fbi->fdadr[DMA_OV2_Y]  | (enabled ? 0x1 : 0);
 682         uint32_t fdadr3 = ofb->fbi->fdadr[DMA_OV2_Cb] | (enabled ? 0x1 : 0);
 683         uint32_t fdadr4 = ofb->fbi->fdadr[DMA_OV2_Cr] | (enabled ? 0x1 : 0);
 684
 685         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED)
 686                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
 687         else {
 688                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
 689                 lcd_writel(ofb->fbi, enabled ? FBR3 : FDADR3, fdadr3);
 690                 lcd_writel(ofb->fbi, enabled ? FBR4 : FDADR4, fdadr4);
 691         }
 692         lcd_writel(ofb->fbi, OVL2C2, ofb->control[1]);
 693         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] | OVLxC1_OEN);
 694 }
 695
 696 static void overlay2fb_disable(struct pxafb_layer *ofb)
 697 {
 698         uint32_t lccr5;
 699
 700         if (!(lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN))
 701                 return;
 702
 703         lccr5 = lcd_readl(ofb->fbi, LCCR5);
 704
 705         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] & ~OVLxC1_OEN);
 706
 707         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(2));
 708         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(2));
 709         lcd_writel(ofb->fbi, FBR2, ofb->fbi->fdadr[DMA_OV2_Y]  | 0x3);
 710         lcd_writel(ofb->fbi, FBR3, ofb->fbi->fdadr[DMA_OV2_Cb] | 0x3);
 711         lcd_writel(ofb->fbi, FBR4, ofb->fbi->fdadr[DMA_OV2_Cr] | 0x3);
 712
 713         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
 714                 pr_warn("%s: timeout disabling overlay2\n", __func__);
 715 }
 716
 717 static struct pxafb_layer_ops ofb_ops[] = {
 718         [0] = {
 719                 .enable         = overlay1fb_enable,
 720                 .disable        = overlay1fb_disable,
 721                 .setup          = overlay1fb_setup,
 722         },
 723         [1] = {
 724                 .enable         = overlay2fb_enable,
 725                 .disable        = overlay2fb_disable,
 726                 .setup          = overlay2fb_setup,
 727         },
 728 };
 729
 730 static int overlayfb_open(struct fb_info *info, int user)
 731 {
 732         struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb);
 733
 734         /* no support for framebuffer console on overlay */
 735         if (user == 0)
 736                 return -ENODEV;
 737
 738         if (ofb->usage++ == 0) {
 739                 /* unblank the base framebuffer */
 740                 console_lock();
 741                 fb_blank(&ofb->fbi->fb, FB_BLANK_UNBLANK);
 742                 console_unlock();
 743         }
 744
 745         return 0;
 746 }
 747
 748 static int overlayfb_release(struct fb_info *info, int user)
 749 {
 750         struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb);
 751
 752         if (ofb->usage == 1) {
 753                 ofb->ops->disable(ofb);
 754                 ofb->fb.var.height      = -1;
 755                 ofb->fb.var.width       = -1;
 756                 ofb->fb.var.xres = ofb->fb.var.xres_virtual = 0;
 757                 ofb->fb.var.yres = ofb->fb.var.yres_virtual = 0;
 758
 759                 ofb->usage--;
 760         }
 761         return 0;
 762 }
 763
 764 static int overlayfb_check_var(struct fb_var_screeninfo *var,
 765                                struct fb_info *info)
 766 {
 767         struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb);
 768         struct fb_var_screeninfo *base_var = &ofb->fbi->fb.var;
 769         int xpos, ypos, pfor, bpp;
 770
 771         xpos = NONSTD_TO_XPOS(var->nonstd);
 772         ypos = NONSTD_TO_YPOS(var->nonstd);
 773         pfor = NONSTD_TO_PFOR(var->nonstd);
 774
 775         bpp = pxafb_var_to_bpp(var);
 776         if (bpp < 0)
 777                 return -EINVAL;
 778
 779         /* no support for YUV format on overlay1 */
 780         if (ofb->id == OVERLAY1 && pfor != 0)
 781                 return -EINVAL;
 782
 783         /* for YUV packed formats, bpp = 'minimum bpp of YUV components' */
 784         switch (pfor) {
 785         case OVERLAY_FORMAT_RGB:
 786                 bpp = pxafb_var_to_bpp(var);
 787                 if (bpp < 0)
 788                         return -EINVAL;
 789
 790                 pxafb_set_pixfmt(var, var_to_depth(var));
 791                 break;
 792         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
 793         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 8; break;
 794         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 4; break;
 795         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 2; break;
 796         default:
 797                 return -EINVAL;
 798         }
 799
 800         /* each line must start at a 32-bit word boundary */
 801         if ((xpos * bpp) % 32)
 802                 return -EINVAL;
 803
 804         /* xres must align on 32-bit word boundary */
 805         var->xres = roundup(var->xres * bpp, 32) / bpp;
 806
 807         if ((xpos + var->xres > base_var->xres) ||
 808             (ypos + var->yres > base_var->yres))
 809                 return -EINVAL;
 810
 811         var->xres_virtual = var->xres;
 812         var->yres_virtual = max(var->yres, var->yres_virtual);
 813         return 0;
 814 }
 815
 816 static int overlayfb_check_video_memory(struct pxafb_layer *ofb)
 817 {
 818         struct fb_var_screeninfo *var = &ofb->fb.var;
 819         int pfor = NONSTD_TO_PFOR(var->nonstd);
 820         int size, bpp = 0;
 821
 822         switch (pfor) {
 823         case OVERLAY_FORMAT_RGB: bpp = var->bits_per_pixel; break;
 824         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
 825         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 24; break;
 826         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 16; break;
 827         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 12; break;
 828         }
 829
 830         ofb->fb.fix.line_length = var->xres_virtual * bpp / 8;
 831
 832         size = PAGE_ALIGN(ofb->fb.fix.line_length * var->yres_virtual);
 833
 834         if (ofb->video_mem) {
 835                 if (ofb->video_mem_size >= size)
 836                         return 0;
 837         }
 838         return -EINVAL;
 839 }
 840
 841 static int overlayfb_set_par(struct fb_info *info)
 842 {
 843         struct pxafb_layer *ofb = container_of(info, struct pxafb_layer, fb);
 844         struct fb_var_screeninfo *var = &info->var;
 845         int xpos, ypos, pfor, bpp, ret;
 846
 847         ret = overlayfb_check_video_memory(ofb);
 848         if (ret)
 849                 return ret;
 850
 851         bpp  = pxafb_var_to_bpp(var);
 852         xpos = NONSTD_TO_XPOS(var->nonstd);
 853         ypos = NONSTD_TO_YPOS(var->nonstd);
 854         pfor = NONSTD_TO_PFOR(var->nonstd);
 855
 856         ofb->control[0] = OVLxC1_PPL(var->xres) | OVLxC1_LPO(var->yres) |
 857                           OVLxC1_BPP(bpp);
 858         ofb->control[1] = OVLxC2_XPOS(xpos) | OVLxC2_YPOS(ypos);
 859
 860         if (ofb->id == OVERLAY2)
 861                 ofb->control[1] |= OVL2C2_PFOR(pfor);
 862
 863         ofb->ops->setup(ofb);
 864         ofb->ops->enable(ofb);
 865         return 0;
 866 }
 867
 868 static const struct fb_ops overlay_fb_ops = {
 869         .owner                  = THIS_MODULE,
 870         .fb_open                = overlayfb_open,
 871         .fb_release             = overlayfb_release,
 872         .fb_check_var           = overlayfb_check_var,
 873         .fb_set_par             = overlayfb_set_par,
 874 };
 875
 876 static void init_pxafb_overlay(struct pxafb_info *fbi, struct pxafb_layer *ofb,
 877                                int id)
 878 {
 879         sprintf(ofb->fb.fix.id, "overlay%d", id + 1);
 880
 881         ofb->fb.fix.type                = FB_TYPE_PACKED_PIXELS;
 882         ofb->fb.fix.xpanstep            = 0;
 883         ofb->fb.fix.ypanstep            = 1;
 884
 885         ofb->fb.var.activate            = FB_ACTIVATE_NOW;
 886         ofb->fb.var.height              = -1;
 887         ofb->fb.var.width               = -1;
 888         ofb->fb.var.vmode               = FB_VMODE_NONINTERLACED;
 889
 890         ofb->fb.fbops                   = &overlay_fb_ops;
 891         ofb->fb.flags                   = FBINFO_FLAG_DEFAULT;
 892         ofb->fb.node                    = -1;
 893         ofb->fb.pseudo_palette          = NULL;
 894
 895         ofb->id = id;
 896         ofb->ops = &ofb_ops[id];
 897         ofb->usage = 0;
 898         ofb->fbi = fbi;
 899         init_completion(&ofb->branch_done);
 900 }
 901
 902 static inline int pxafb_overlay_supported(void)
 903 {
 904         if (cpu_is_pxa27x() || cpu_is_pxa3xx())
 905                 return 1;
 906
 907         return 0;
 908 }
 909
 910 static int pxafb_overlay_map_video_memory(struct pxafb_info *pxafb,
 911                                           struct pxafb_layer *ofb)
 912 {
 913         /* We assume that user will use at most video_mem_size for overlay fb,
 914          * anyway, it's useless to use 16bpp main plane and 24bpp overlay
 915          */
 916         ofb->video_mem = alloc_pages_exact(PAGE_ALIGN(pxafb->video_mem_size),
 917                 GFP_KERNEL | __GFP_ZERO);
 918         if (ofb->video_mem == NULL)
 919                 return -ENOMEM;
 920
 921         ofb->video_mem_phys = virt_to_phys(ofb->video_mem);
 922         ofb->video_mem_size = PAGE_ALIGN(pxafb->video_mem_size);
 923
 924         mutex_lock(&ofb->fb.mm_lock);
 925         ofb->fb.fix.smem_start  = ofb->video_mem_phys;
 926         ofb->fb.fix.smem_len    = pxafb->video_mem_size;
 927         mutex_unlock(&ofb->fb.mm_lock);
 928
 929         ofb->fb.screen_base     = ofb->video_mem;
 930
 931         return 0;
 932 }
 933
 934 static void pxafb_overlay_init(struct pxafb_info *fbi)
 935 {
 936         int i, ret;
 937
 938         if (!pxafb_overlay_supported())
 939                 return;
 940
 941         for (i = 0; i < 2; i++) {
 942                 struct pxafb_layer *ofb = &fbi->overlay[i];
 943                 init_pxafb_overlay(fbi, ofb, i);
 944                 ret = register_framebuffer(&ofb->fb);
 945                 if (ret) {
 946                         dev_err(fbi->dev, "failed to register overlay %d\n", i);
 947                         continue;
 948                 }
 949                 ret = pxafb_overlay_map_video_memory(fbi, ofb);
 950                 if (ret) {
 951                         dev_err(fbi->dev,
 952                                 "failed to map video memory for overlay %d\n",
 953                                 i);
 954                         unregister_framebuffer(&ofb->fb);
 955                         continue;
 956                 }
 957                 ofb->registered = 1;
 958         }
 959
 960         /* mask all IU/BS/EOF/SOF interrupts */
 961         lcd_writel(fbi, LCCR5, ~0);
 962
 963         pr_info("PXA Overlay driver loaded successfully!\n");
 964 }
 965
 966 static void pxafb_overlay_exit(struct pxafb_info *fbi)
 967 {
 968         int i;
 969
 970         if (!pxafb_overlay_supported())
 971                 return;
 972
 973         for (i = 0; i < 2; i++) {
 974                 struct pxafb_layer *ofb = &fbi->overlay[i];
 975                 if (ofb->registered) {
 976                         if (ofb->video_mem)
 977                                 free_pages_exact(ofb->video_mem,
 978                                         ofb->video_mem_size);
 979                         unregister_framebuffer(&ofb->fb);
 980                 }
 981         }
 982 }
 983 #else
 984 static inline void pxafb_overlay_init(struct pxafb_info *fbi) {}
 985 static inline void pxafb_overlay_exit(struct pxafb_info *fbi) {}
 986 #endif /* CONFIG_FB_PXA_OVERLAY */
 987
 988 /*
 989  * Calculate the PCD value from the clock rate (in picoseconds).
 990  * We take account of the PPCR clock setting.
 991  * From PXA Developer's Manual:
 992  *
 993  *   PixelClock =      LCLK
 994  *                -------------
 995  *                2 ( PCD + 1 )
 996  *
 997  *   PCD =      LCLK
 998  *         ------------- - 1
 999  *         2(PixelClock)
1000  *
1001  * Where:
1002  *   LCLK = LCD/Memory Clock
1003  *   PCD = LCCR3[7:0]
1004  *
1005  * PixelClock here is in Hz while the pixclock argument given is the
1006  * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 )
1007  *
1008  * The function get_lclk_frequency_10khz returns LCLK in units of
1009  * 10khz. Calling the result of this function lclk gives us the
1010  * following
1011  *
1012  *    PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 )
1013  *          -------------------------------------- - 1
1014  *                          2
1015  *
1016  * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below.
1017  */
1018 static inline unsigned int get_pcd(struct pxafb_info *fbi,
1019                                    unsigned int pixclock)
1020 {
1021         unsigned long long pcd;
1022
1023         /* FIXME: Need to take into account Double Pixel Clock mode
1024          * (DPC) bit? or perhaps set it based on the various clock
1025          * speeds */
1026         pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000);
1027         pcd *= pixclock;
1028         do_div(pcd, 100000000 * 2);
1029         /* no need for this, since we should subtract 1 anyway. they cancel */
1030         /* pcd += 1; */ /* make up for integer math truncations */
1031         return (unsigned int)pcd;
1032 }
1033
1034 /*
1035  * Some touchscreens need hsync information from the video driver to
1036  * function correctly. We export it here.  Note that 'hsync_time' and
1037  * the value returned from pxafb_get_hsync_time() is the *reciprocal*
1038  * of the hsync period in seconds.
1039  */
1040 static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd)
1041 {
1042         unsigned long htime;
1043
1044         if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) {
1045                 fbi->hsync_time = 0;
1046                 return;
1047         }
1048
1049         htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len);
1050
1051         fbi->hsync_time = htime;
1052 }
1053
1054 unsigned long pxafb_get_hsync_time(struct device *dev)
1055 {
1056         struct pxafb_info *fbi = dev_get_drvdata(dev);
1057
1058         /* If display is blanked/suspended, hsync isn't active */
1059         if (!fbi || (fbi->state != C_ENABLE))
1060                 return 0;
1061
1062         return fbi->hsync_time;
1063 }
1064 EXPORT_SYMBOL(pxafb_get_hsync_time);
1065
1066 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
1067                            unsigned long start, size_t size)
1068 {
1069         struct pxafb_dma_descriptor *dma_desc, *pal_desc;
1070         unsigned int dma_desc_off, pal_desc_off;
1071
1072         if (dma < 0 || dma >= DMA_MAX * 2)
1073                 return -EINVAL;
1074
1075         dma_desc = &fbi->dma_buff->dma_desc[dma];
1076         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]);
1077
1078         dma_desc->fsadr = start;
1079         dma_desc->fidr  = 0;
1080         dma_desc->ldcmd = size;
1081
1082         if (pal < 0 || pal >= PAL_MAX * 2) {
1083                 dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1084                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1085         } else {
1086                 pal_desc = &fbi->dma_buff->pal_desc[pal];
1087                 pal_desc_off = offsetof(struct pxafb_dma_buff, pal_desc[pal]);
1088
1089                 pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE;
1090                 pal_desc->fidr  = 0;
1091
1092                 if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
1093                         pal_desc->ldcmd = fbi->palette_size * sizeof(u16);
1094                 else
1095                         pal_desc->ldcmd = fbi->palette_size * sizeof(u32);
1096
1097                 pal_desc->ldcmd |= LDCMD_PAL;
1098
1099                 /* flip back and forth between palette and frame buffer */
1100                 pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1101                 dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off;
1102                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1103         }
1104
1105         return 0;
1106 }
1107
1108 static void setup_base_frame(struct pxafb_info *fbi,
1109                              struct fb_var_screeninfo *var,
1110                              int branch)
1111 {
1112         struct fb_fix_screeninfo *fix = &fbi->fb.fix;
1113         int nbytes, dma, pal, bpp = var->bits_per_pixel;
1114         unsigned long offset;
1115
1116         dma = DMA_BASE + (branch ? DMA_MAX : 0);
1117         pal = (bpp >= 16) ? PAL_NONE : PAL_BASE + (branch ? PAL_MAX : 0);
1118
1119         nbytes = fix->line_length * var->yres;
1120         offset = fix->line_length * var->yoffset + fbi->video_mem_phys;
1121
1122         if (fbi->lccr0 & LCCR0_SDS) {
1123                 nbytes = nbytes / 2;
1124                 setup_frame_dma(fbi, dma + 1, PAL_NONE, offset + nbytes, nbytes);
1125         }
1126
1127         setup_frame_dma(fbi, dma, pal, offset, nbytes);
1128 }
1129
1130 #ifdef CONFIG_FB_PXA_SMARTPANEL
1131 static int setup_smart_dma(struct pxafb_info *fbi)
1132 {
1133         struct pxafb_dma_descriptor *dma_desc;
1134         unsigned long dma_desc_off, cmd_buff_off;
1135
1136         dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD];
1137         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]);
1138         cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff);
1139
1140         dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1141         dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off;
1142         dma_desc->fidr  = 0;
1143         dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t);
1144
1145         fbi->fdadr[DMA_CMD] = dma_desc->fdadr;
1146         return 0;
1147 }
1148
1149 int pxafb_smart_flush(struct fb_info *info)
1150 {
1151         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1152         uint32_t prsr;
1153         int ret = 0;
1154
1155         /* disable controller until all registers are set up */
1156         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1157
1158         /* 1. make it an even number of commands to align on 32-bit boundary
1159          * 2. add the interrupt command to the end of the chain so we can
1160          *    keep track of the end of the transfer
1161          */
1162
1163         while (fbi->n_smart_cmds & 1)
1164                 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP;
1165
1166         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT;
1167         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC;
1168         setup_smart_dma(fbi);
1169
1170         /* continue to execute next command */
1171         prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT;
1172         lcd_writel(fbi, PRSR, prsr);
1173
1174         /* stop the processor in case it executed "wait for sync" cmd */
1175         lcd_writel(fbi, CMDCR, 0x0001);
1176
1177         /* don't send interrupts for fifo underruns on channel 6 */
1178         lcd_writel(fbi, LCCR5, LCCR5_IUM(6));
1179
1180         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1181         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1182         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1183         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1184         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1185         lcd_writel(fbi, FDADR6, fbi->fdadr[6]);
1186
1187         /* begin sending */
1188         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1189
1190         if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) {
1191                 pr_warn("%s: timeout waiting for command done\n", __func__);
1192                 ret = -ETIMEDOUT;
1193         }
1194
1195         /* quick disable */
1196         prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT);
1197         lcd_writel(fbi, PRSR, prsr);
1198         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1199         lcd_writel(fbi, FDADR6, 0);
1200         fbi->n_smart_cmds = 0;
1201         return ret;
1202 }
1203
1204 int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
1205 {
1206         int i;
1207         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1208
1209         for (i = 0; i < n_cmds; i++, cmds++) {
1210                 /* if it is a software delay, flush and delay */
1211                 if ((*cmds & 0xff00) == SMART_CMD_DELAY) {
1212                         pxafb_smart_flush(info);
1213                         mdelay(*cmds & 0xff);
1214                         continue;
1215                 }
1216
1217                 /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */
1218                 if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8)
1219                         pxafb_smart_flush(info);
1220
1221                 fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds;
1222         }
1223
1224         return 0;
1225 }
1226
1227 static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk)
1228 {
1229         unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000);
1230         return (t == 0) ? 1 : t;
1231 }
1232
1233 static void setup_smart_timing(struct pxafb_info *fbi,
1234                                 struct fb_var_screeninfo *var)
1235 {
1236         struct pxafb_mach_info *inf = fbi->inf;
1237         struct pxafb_mode_info *mode = &inf->modes[0];
1238         unsigned long lclk = clk_get_rate(fbi->clk);
1239         unsigned t1, t2, t3, t4;
1240
1241         t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld);
1242         t2 = max(mode->rd_pulse_width, mode->wr_pulse_width);
1243         t3 = mode->op_hold_time;
1244         t4 = mode->cmd_inh_time;
1245
1246         fbi->reg_lccr1 =
1247                 LCCR1_DisWdth(var->xres) |
1248                 LCCR1_BegLnDel(__smart_timing(t1, lclk)) |
1249                 LCCR1_EndLnDel(__smart_timing(t2, lclk)) |
1250                 LCCR1_HorSnchWdth(__smart_timing(t3, lclk));
1251
1252         fbi->reg_lccr2 = LCCR2_DisHght(var->yres);
1253         fbi->reg_lccr3 = fbi->lccr3 | LCCR3_PixClkDiv(__smart_timing(t4, lclk));
1254         fbi->reg_lccr3 |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? LCCR3_HSP : 0;
1255         fbi->reg_lccr3 |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? LCCR3_VSP : 0;
1256
1257         /* FIXME: make this configurable */
1258         fbi->reg_cmdcr = 1;
1259 }
1260
1261 static int pxafb_smart_thread(void *arg)
1262 {
1263         struct pxafb_info *fbi = arg;
1264         struct pxafb_mach_info *inf = fbi->inf;
1265
1266         if (!inf->smart_update) {
1267                 pr_err("%s: not properly initialized, thread terminated\n",
1268                                 __func__);
1269                 return -EINVAL;
1270         }
1271
1272         pr_debug("%s(): task starting\n", __func__);
1273
1274         set_freezable();
1275         while (!kthread_should_stop()) {
1276
1277                 if (try_to_freeze())
1278                         continue;
1279
1280                 mutex_lock(&fbi->ctrlr_lock);
1281
1282                 if (fbi->state == C_ENABLE) {
1283                         inf->smart_update(&fbi->fb);
1284                         complete(&fbi->refresh_done);
1285                 }
1286
1287                 mutex_unlock(&fbi->ctrlr_lock);
1288
1289                 set_current_state(TASK_INTERRUPTIBLE);
1290                 schedule_timeout(msecs_to_jiffies(30));
1291         }
1292
1293         pr_debug("%s(): task ending\n", __func__);
1294         return 0;
1295 }
1296
1297 static int pxafb_smart_init(struct pxafb_info *fbi)
1298 {
1299         if (!(fbi->lccr0 & LCCR0_LCDT))
1300                 return 0;
1301
1302         fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff;
1303         fbi->n_smart_cmds = 0;
1304
1305         init_completion(&fbi->command_done);
1306         init_completion(&fbi->refresh_done);
1307
1308         fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi,
1309                                         "lcd_refresh");
1310         if (IS_ERR(fbi->smart_thread)) {
1311                 pr_err("%s: unable to create kernel thread\n", __func__);
1312                 return PTR_ERR(fbi->smart_thread);
1313         }
1314
1315         return 0;
1316 }
1317 #else
1318 static inline int pxafb_smart_init(struct pxafb_info *fbi) { return 0; }
1319 #endif /* CONFIG_FB_PXA_SMARTPANEL */
1320
1321 static void setup_parallel_timing(struct pxafb_info *fbi,
1322                                   struct fb_var_screeninfo *var)
1323 {
1324         unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock);
1325
1326         fbi->reg_lccr1 =
1327                 LCCR1_DisWdth(var->xres) +
1328                 LCCR1_HorSnchWdth(var->hsync_len) +
1329                 LCCR1_BegLnDel(var->left_margin) +
1330                 LCCR1_EndLnDel(var->right_margin);
1331
1332         /*
1333          * If we have a dual scan LCD, we need to halve
1334          * the YRES parameter.
1335          */
1336         lines_per_panel = var->yres;
1337         if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual)
1338                 lines_per_panel /= 2;
1339
1340         fbi->reg_lccr2 =
1341                 LCCR2_DisHght(lines_per_panel) +
1342                 LCCR2_VrtSnchWdth(var->vsync_len) +
1343                 LCCR2_BegFrmDel(var->upper_margin) +
1344                 LCCR2_EndFrmDel(var->lower_margin);
1345
1346         fbi->reg_lccr3 = fbi->lccr3 |
1347                 (var->sync & FB_SYNC_HOR_HIGH_ACT ?
1348                  LCCR3_HorSnchH : LCCR3_HorSnchL) |
1349                 (var->sync & FB_SYNC_VERT_HIGH_ACT ?
1350                  LCCR3_VrtSnchH : LCCR3_VrtSnchL);
1351
1352         if (pcd) {
1353                 fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd);
1354                 set_hsync_time(fbi, pcd);
1355         }
1356 }
1357
1358 /*
1359  * pxafb_activate_var():
1360  *      Configures LCD Controller based on entries in var parameter.
1361  *      Settings are only written to the controller if changes were made.
1362  */
1363 static int pxafb_activate_var(struct fb_var_screeninfo *var,
1364                               struct pxafb_info *fbi)
1365 {
1366         u_long flags;
1367
1368         /* Update shadow copy atomically */
1369         local_irq_save(flags);
1370
1371 #ifdef CONFIG_FB_PXA_SMARTPANEL
1372         if (fbi->lccr0 & LCCR0_LCDT)
1373                 setup_smart_timing(fbi, var);
1374         else
1375 #endif
1376                 setup_parallel_timing(fbi, var);
1377
1378         setup_base_frame(fbi, var, 0);
1379
1380         fbi->reg_lccr0 = fbi->lccr0 |
1381                 (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
1382                  LCCR0_QDM | LCCR0_BM  | LCCR0_OUM);
1383
1384         fbi->reg_lccr3 |= pxafb_var_to_lccr3(var);
1385
1386         fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK;
1387         fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK);
1388         local_irq_restore(flags);
1389
1390         /*
1391          * Only update the registers if the controller is enabled
1392          * and something has changed.
1393          */
1394         if ((lcd_readl(fbi, LCCR0) != fbi->reg_lccr0) ||
1395             (lcd_readl(fbi, LCCR1) != fbi->reg_lccr1) ||
1396             (lcd_readl(fbi, LCCR2) != fbi->reg_lccr2) ||
1397             (lcd_readl(fbi, LCCR3) != fbi->reg_lccr3) ||
1398             (lcd_readl(fbi, LCCR4) != fbi->reg_lccr4) ||
1399             (lcd_readl(fbi, FDADR0) != fbi->fdadr[0]) ||
1400             ((fbi->lccr0 & LCCR0_SDS) &&
1401             (lcd_readl(fbi, FDADR1) != fbi->fdadr[1])))
1402                 pxafb_schedule_work(fbi, C_REENABLE);
1403
1404         return 0;
1405 }
1406
1407 /*
1408  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
1409  * Do not call them directly; set_ctrlr_state does the correct serialisation
1410  * to ensure that things happen in the right way 100% of time time.
1411  *      -- rmk
1412  */
1413 static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on)
1414 {
1415         pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff");
1416
1417         if (fbi->backlight_power)
1418                 fbi->backlight_power(on);
1419 }
1420
1421 static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on)
1422 {
1423         pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff");
1424
1425         if (fbi->lcd_power)
1426                 fbi->lcd_power(on, &fbi->fb.var);
1427
1428         if (fbi->lcd_supply && fbi->lcd_supply_enabled != on) {
1429                 int ret;
1430
1431                 if (on)
1432                         ret = regulator_enable(fbi->lcd_supply);
1433                 else
1434                         ret = regulator_disable(fbi->lcd_supply);
1435
1436                 if (ret < 0)
1437                         pr_warn("Unable to %s LCD supply regulator: %d\n",
1438                                 on ? "enable" : "disable", ret);
1439                 else
1440                         fbi->lcd_supply_enabled = on;
1441         }
1442 }
1443
1444 static void pxafb_enable_controller(struct pxafb_info *fbi)
1445 {
1446         pr_debug("pxafb: Enabling LCD controller\n");
1447         pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]);
1448         pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]);
1449         pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
1450         pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
1451         pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
1452         pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
1453
1454         /* enable LCD controller clock */
1455         if (clk_prepare_enable(fbi->clk)) {
1456                 pr_err("%s: Failed to prepare clock\n", __func__);
1457                 return;
1458         }
1459
1460         if (fbi->lccr0 & LCCR0_LCDT)
1461                 return;
1462
1463         /* Sequence from 11.7.10 */
1464         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1465         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1466         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1467         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1468         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1469
1470         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1471         if (fbi->lccr0 & LCCR0_SDS)
1472                 lcd_writel(fbi, FDADR1, fbi->fdadr[1]);
1473         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1474 }
1475
1476 static void pxafb_disable_controller(struct pxafb_info *fbi)
1477 {
1478         uint32_t lccr0;
1479
1480 #ifdef CONFIG_FB_PXA_SMARTPANEL
1481         if (fbi->lccr0 & LCCR0_LCDT) {
1482                 wait_for_completion_timeout(&fbi->refresh_done,
1483                                 msecs_to_jiffies(200));
1484                 return;
1485         }
1486 #endif
1487
1488         /* Clear LCD Status Register */
1489         lcd_writel(fbi, LCSR, 0xffffffff);
1490
1491         lccr0 = lcd_readl(fbi, LCCR0) & ~LCCR0_LDM;
1492         lcd_writel(fbi, LCCR0, lccr0);
1493         lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS);
1494
1495         wait_for_completion_timeout(&fbi->disable_done, msecs_to_jiffies(200));
1496
1497         /* disable LCD controller clock */
1498         clk_disable_unprepare(fbi->clk);
1499 }
1500
1501 /*
1502  *  pxafb_handle_irq: Handle 'LCD DONE' interrupts.
1503  */
1504 static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
1505 {
1506         struct pxafb_info *fbi = dev_id;
1507         unsigned int lccr0, lcsr;
1508
1509         lcsr = lcd_readl(fbi, LCSR);
1510         if (lcsr & LCSR_LDD) {
1511                 lccr0 = lcd_readl(fbi, LCCR0);
1512                 lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM);
1513                 complete(&fbi->disable_done);
1514         }
1515
1516 #ifdef CONFIG_FB_PXA_SMARTPANEL
1517         if (lcsr & LCSR_CMD_INT)
1518                 complete(&fbi->command_done);
1519 #endif
1520         lcd_writel(fbi, LCSR, lcsr);
1521
1522 #ifdef CONFIG_FB_PXA_OVERLAY
1523         {
1524                 unsigned int lcsr1 = lcd_readl(fbi, LCSR1);
1525                 if (lcsr1 & LCSR1_BS(1))
1526                         complete(&fbi->overlay[0].branch_done);
1527
1528                 if (lcsr1 & LCSR1_BS(2))
1529                         complete(&fbi->overlay[1].branch_done);
1530
1531                 lcd_writel(fbi, LCSR1, lcsr1);
1532         }
1533 #endif
1534         return IRQ_HANDLED;
1535 }
1536
1537 /*
1538  * This function must be called from task context only, since it will
1539  * sleep when disabling the LCD controller, or if we get two contending
1540  * processes trying to alter state.
1541  */
1542 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
1543 {
1544         u_int old_state;
1545
1546         mutex_lock(&fbi->ctrlr_lock);
1547
1548         old_state = fbi->state;
1549
1550         /*
1551          * Hack around fbcon initialisation.
1552          */
1553         if (old_state == C_STARTUP && state == C_REENABLE)
1554                 state = C_ENABLE;
1555
1556         switch (state) {
1557         case C_DISABLE_CLKCHANGE:
1558                 /*
1559                  * Disable controller for clock change.  If the
1560                  * controller is already disabled, then do nothing.
1561                  */
1562                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
1563                         fbi->state = state;
1564                         /* TODO __pxafb_lcd_power(fbi, 0); */
1565                         pxafb_disable_controller(fbi);
1566                 }
1567                 break;
1568
1569         case C_DISABLE_PM:
1570         case C_DISABLE:
1571                 /*
1572                  * Disable controller
1573                  */
1574                 if (old_state != C_DISABLE) {
1575                         fbi->state = state;
1576                         __pxafb_backlight_power(fbi, 0);
1577                         __pxafb_lcd_power(fbi, 0);
1578                         if (old_state != C_DISABLE_CLKCHANGE)
1579                                 pxafb_disable_controller(fbi);
1580                 }
1581                 break;
1582
1583         case C_ENABLE_CLKCHANGE:
1584                 /*
1585                  * Enable the controller after clock change.  Only
1586                  * do this if we were disabled for the clock change.
1587                  */
1588                 if (old_state == C_DISABLE_CLKCHANGE) {
1589                         fbi->state = C_ENABLE;
1590                         pxafb_enable_controller(fbi);
1591                         /* TODO __pxafb_lcd_power(fbi, 1); */
1592                 }
1593                 break;
1594
1595         case C_REENABLE:
1596                 /*
1597                  * Re-enable the controller only if it was already
1598                  * enabled.  This is so we reprogram the control
1599                  * registers.
1600                  */
1601                 if (old_state == C_ENABLE) {
1602                         __pxafb_lcd_power(fbi, 0);
1603                         pxafb_disable_controller(fbi);
1604                         pxafb_enable_controller(fbi);
1605                         __pxafb_lcd_power(fbi, 1);
1606                 }
1607                 break;
1608
1609         case C_ENABLE_PM:
1610                 /*
1611                  * Re-enable the controller after PM.  This is not
1612                  * perfect - think about the case where we were doing
1613                  * a clock change, and we suspended half-way through.
1614                  */
1615                 if (old_state != C_DISABLE_PM)
1616                         break;
1617                 fallthrough;
1618
1619         case C_ENABLE:
1620                 /*
1621                  * Power up the LCD screen, enable controller, and
1622                  * turn on the backlight.
1623                  */
1624                 if (old_state != C_ENABLE) {
1625                         fbi->state = C_ENABLE;
1626                         pxafb_enable_controller(fbi);
1627                         __pxafb_lcd_power(fbi, 1);
1628                         __pxafb_backlight_power(fbi, 1);
1629                 }
1630                 break;
1631         }
1632         mutex_unlock(&fbi->ctrlr_lock);
1633 }
1634
1635 /*
1636  * Our LCD controller task (which is called when we blank or unblank)
1637  * via keventd.
1638  */
1639 static void pxafb_task(struct work_struct *work)
1640 {
1641         struct pxafb_info *fbi =
1642                 container_of(work, struct pxafb_info, task);
1643         u_int state = xchg(&fbi->task_state, -1);
1644
1645         set_ctrlr_state(fbi, state);
1646 }
1647
1648 #ifdef CONFIG_CPU_FREQ
1649 /*
1650  * CPU clock speed change handler.  We need to adjust the LCD timing
1651  * parameters when the CPU clock is adjusted by the power management
1652  * subsystem.
1653  *
1654  * TODO: Determine why f->new != 10*get_lclk_frequency_10khz()
1655  */
1656 static int
1657 pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
1658 {
1659         struct pxafb_info *fbi = TO_INF(nb, freq_transition);
1660         /* TODO struct cpufreq_freqs *f = data; */
1661         u_int pcd;
1662
1663         switch (val) {
1664         case CPUFREQ_PRECHANGE:
1665 #ifdef CONFIG_FB_PXA_OVERLAY
1666                 if (!(fbi->overlay[0].usage || fbi->overlay[1].usage))
1667 #endif
1668                         set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1669                 break;
1670
1671         case CPUFREQ_POSTCHANGE:
1672                 pcd = get_pcd(fbi, fbi->fb.var.pixclock);
1673                 set_hsync_time(fbi, pcd);
1674                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) |
1675                                   LCCR3_PixClkDiv(pcd);
1676                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1677                 break;
1678         }
1679         return 0;
1680 }
1681 #endif
1682
1683 #ifdef CONFIG_PM
1684 /*
1685  * Power management hooks.  Note that we won't be called from IRQ context,
1686  * unlike the blank functions above, so we may sleep.
1687  */
1688 static int pxafb_suspend(struct device *dev)
1689 {
1690         struct pxafb_info *fbi = dev_get_drvdata(dev);
1691
1692         set_ctrlr_state(fbi, C_DISABLE_PM);
1693         return 0;
1694 }
1695
1696 static int pxafb_resume(struct device *dev)
1697 {
1698         struct pxafb_info *fbi = dev_get_drvdata(dev);
1699
1700         set_ctrlr_state(fbi, C_ENABLE_PM);
1701         return 0;
1702 }
1703
1704 static const struct dev_pm_ops pxafb_pm_ops = {
1705         .suspend        = pxafb_suspend,
1706         .resume         = pxafb_resume,
1707 };
1708 #endif
1709
1710 static int pxafb_init_video_memory(struct pxafb_info *fbi)
1711 {
1712         int size = PAGE_ALIGN(fbi->video_mem_size);
1713
1714         fbi->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
1715         if (fbi->video_mem == NULL)
1716                 return -ENOMEM;
1717
1718         fbi->video_mem_phys = virt_to_phys(fbi->video_mem);
1719         fbi->video_mem_size = size;
1720
1721         fbi->fb.fix.smem_start  = fbi->video_mem_phys;
1722         fbi->fb.fix.smem_len    = fbi->video_mem_size;
1723         fbi->fb.screen_base     = fbi->video_mem;
1724
1725         return fbi->video_mem ? 0 : -ENOMEM;
1726 }
1727
1728 static void pxafb_decode_mach_info(struct pxafb_info *fbi,
1729                                    struct pxafb_mach_info *inf)
1730 {
1731         unsigned int lcd_conn = inf->lcd_conn;
1732         struct pxafb_mode_info *m;
1733         int i;
1734
1735         fbi->cmap_inverse       = inf->cmap_inverse;
1736         fbi->cmap_static        = inf->cmap_static;
1737         fbi->lccr4              = inf->lccr4;
1738
1739         switch (lcd_conn & LCD_TYPE_MASK) {
1740         case LCD_TYPE_MONO_STN:
1741                 fbi->lccr0 = LCCR0_CMS;
1742                 break;
1743         case LCD_TYPE_MONO_DSTN:
1744                 fbi->lccr0 = LCCR0_CMS | LCCR0_SDS;
1745                 break;
1746         case LCD_TYPE_COLOR_STN:
1747                 fbi->lccr0 = 0;
1748                 break;
1749         case LCD_TYPE_COLOR_DSTN:
1750                 fbi->lccr0 = LCCR0_SDS;
1751                 break;
1752         case LCD_TYPE_COLOR_TFT:
1753                 fbi->lccr0 = LCCR0_PAS;
1754                 break;
1755         case LCD_TYPE_SMART_PANEL:
1756                 fbi->lccr0 = LCCR0_LCDT | LCCR0_PAS;
1757                 break;
1758         default:
1759                 /* fall back to backward compatibility way */
1760                 fbi->lccr0 = inf->lccr0;
1761                 fbi->lccr3 = inf->lccr3;
1762                 goto decode_mode;
1763         }
1764
1765         if (lcd_conn == LCD_MONO_STN_8BPP)
1766                 fbi->lccr0 |= LCCR0_DPD;
1767
1768         fbi->lccr0 |= (lcd_conn & LCD_ALTERNATE_MAPPING) ? LCCR0_LDDALT : 0;
1769
1770         fbi->lccr3 = LCCR3_Acb((inf->lcd_conn >> 10) & 0xff);
1771         fbi->lccr3 |= (lcd_conn & LCD_BIAS_ACTIVE_LOW) ? LCCR3_OEP : 0;
1772         fbi->lccr3 |= (lcd_conn & LCD_PCLK_EDGE_FALL)  ? LCCR3_PCP : 0;
1773
1774 decode_mode:
1775         pxafb_setmode(&fbi->fb.var, &inf->modes[0]);
1776
1777         /* decide video memory size as follows:
1778          * 1. default to mode of maximum resolution
1779          * 2. allow platform to override
1780          * 3. allow module parameter to override
1781          */
1782         for (i = 0, m = &inf->modes[0]; i < inf->num_modes; i++, m++)
1783                 fbi->video_mem_size = max_t(size_t, fbi->video_mem_size,
1784                                 m->xres * m->yres * m->bpp / 8);
1785
1786         if (inf->video_mem_size > fbi->video_mem_size)
1787                 fbi->video_mem_size = inf->video_mem_size;
1788
1789         if (video_mem_size > fbi->video_mem_size)
1790                 fbi->video_mem_size = video_mem_size;
1791 }
1792
1793 static struct pxafb_info *pxafb_init_fbinfo(struct device *dev,
1794                                             struct pxafb_mach_info *inf)
1795 {
1796         struct pxafb_info *fbi;
1797         void *addr;
1798
1799         /* Alloc the pxafb_info and pseudo_palette in one step */
1800         fbi = devm_kzalloc(dev, sizeof(struct pxafb_info) + sizeof(u32) * 16,
1801                            GFP_KERNEL);
1802         if (!fbi)
1803                 return ERR_PTR(-ENOMEM);
1804
1805         fbi->dev = dev;
1806         fbi->inf = inf;
1807
1808         fbi->clk = devm_clk_get(dev, NULL);
1809         if (IS_ERR(fbi->clk))
1810                 return ERR_CAST(fbi->clk);
1811
1812         strcpy(fbi->fb.fix.id, PXA_NAME);
1813
1814         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1815         fbi->fb.fix.type_aux    = 0;
1816         fbi->fb.fix.xpanstep    = 0;
1817         fbi->fb.fix.ypanstep    = 1;
1818         fbi->fb.fix.ywrapstep   = 0;
1819         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1820
1821         fbi->fb.var.nonstd      = 0;
1822         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1823         fbi->fb.var.height      = -1;
1824         fbi->fb.var.width       = -1;
1825         fbi->fb.var.accel_flags = FB_ACCELF_TEXT;
1826         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1827
1828         fbi->fb.fbops           = &pxafb_ops;
1829         fbi->fb.flags           = FBINFO_DEFAULT;
1830         fbi->fb.node            = -1;
1831
1832         addr = fbi;
1833         addr = addr + sizeof(struct pxafb_info);
1834         fbi->fb.pseudo_palette  = addr;
1835
1836         fbi->state              = C_STARTUP;
1837         fbi->task_state         = (u_char)-1;
1838
1839         pxafb_decode_mach_info(fbi, inf);
1840
1841 #ifdef CONFIG_FB_PXA_OVERLAY
1842         /* place overlay(s) on top of base */
1843         if (pxafb_overlay_supported())
1844                 fbi->lccr0 |= LCCR0_OUC;
1845 #endif
1846
1847         init_waitqueue_head(&fbi->ctrlr_wait);
1848         INIT_WORK(&fbi->task, pxafb_task);
1849         mutex_init(&fbi->ctrlr_lock);
1850         init_completion(&fbi->disable_done);
1851
1852         return fbi;
1853 }
1854
1855 #ifdef CONFIG_FB_PXA_PARAMETERS
1856 static int parse_opt_mode(struct device *dev, const char *this_opt,
1857                           struct pxafb_mach_info *inf)
1858 {
1859         const char *name = this_opt+5;
1860         unsigned int namelen = strlen(name);
1861         int res_specified = 0, bpp_specified = 0;
1862         unsigned int xres = 0, yres = 0, bpp = 0;
1863         int yres_specified = 0;
1864         int i;
1865         for (i = namelen-1; i >= 0; i--) {
1866                 switch (name[i]) {
1867                 case '-':
1868                         namelen = i;
1869                         if (!bpp_specified && !yres_specified) {
1870                                 bpp = simple_strtoul(&name[i+1], NULL, 0);
1871                                 bpp_specified = 1;
1872                         } else
1873                                 goto done;
1874                         break;
1875                 case 'x':
1876                         if (!yres_specified) {
1877                                 yres = simple_strtoul(&name[i+1], NULL, 0);
1878                                 yres_specified = 1;
1879                         } else
1880                                 goto done;
1881                         break;
1882                 case '0' ... '9':
1883                         break;
1884                 default:
1885                         goto done;
1886                 }
1887         }
1888         if (i < 0 && yres_specified) {
1889                 xres = simple_strtoul(name, NULL, 0);
1890                 res_specified = 1;
1891         }
1892 done:
1893         if (res_specified) {
1894                 dev_info(dev, "overriding resolution: %dx%d\n", xres, yres);
1895                 inf->modes[0].xres = xres; inf->modes[0].yres = yres;
1896         }
1897         if (bpp_specified)
1898                 switch (bpp) {
1899                 case 1:
1900                 case 2:
1901                 case 4:
1902                 case 8:
1903                 case 16:
1904                         inf->modes[0].bpp = bpp;
1905                         dev_info(dev, "overriding bit depth: %d\n", bpp);
1906                         break;
1907                 default:
1908                         dev_err(dev, "Depth %d is not valid\n", bpp);
1909                         return -EINVAL;
1910                 }
1911         return 0;
1912 }
1913
1914 static int parse_opt(struct device *dev, char *this_opt,
1915                      struct pxafb_mach_info *inf)
1916 {
1917         struct pxafb_mode_info *mode = &inf->modes[0];
1918         char s[64];
1919
1920         s[0] = '\0';
1921
1922         if (!strncmp(this_opt, "vmem:", 5)) {
1923                 video_mem_size = memparse(this_opt + 5, NULL);
1924         } else if (!strncmp(this_opt, "mode:", 5)) {
1925                 return parse_opt_mode(dev, this_opt, inf);
1926         } else if (!strncmp(this_opt, "pixclock:", 9)) {
1927                 mode->pixclock = simple_strtoul(this_opt+9, NULL, 0);
1928                 sprintf(s, "pixclock: %ld\n", mode->pixclock);
1929         } else if (!strncmp(this_opt, "left:", 5)) {
1930                 mode->left_margin = simple_strtoul(this_opt+5, NULL, 0);
1931                 sprintf(s, "left: %u\n", mode->left_margin);
1932         } else if (!strncmp(this_opt, "right:", 6)) {
1933                 mode->right_margin = simple_strtoul(this_opt+6, NULL, 0);
1934                 sprintf(s, "right: %u\n", mode->right_margin);
1935         } else if (!strncmp(this_opt, "upper:", 6)) {
1936                 mode->upper_margin = simple_strtoul(this_opt+6, NULL, 0);
1937                 sprintf(s, "upper: %u\n", mode->upper_margin);
1938         } else if (!strncmp(this_opt, "lower:", 6)) {
1939                 mode->lower_margin = simple_strtoul(this_opt+6, NULL, 0);
1940                 sprintf(s, "lower: %u\n", mode->lower_margin);
1941         } else if (!strncmp(this_opt, "hsynclen:", 9)) {
1942                 mode->hsync_len = simple_strtoul(this_opt+9, NULL, 0);
1943                 sprintf(s, "hsynclen: %u\n", mode->hsync_len);
1944         } else if (!strncmp(this_opt, "vsynclen:", 9)) {
1945                 mode->vsync_len = simple_strtoul(this_opt+9, NULL, 0);
1946                 sprintf(s, "vsynclen: %u\n", mode->vsync_len);
1947         } else if (!strncmp(this_opt, "hsync:", 6)) {
1948                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1949                         sprintf(s, "hsync: Active Low\n");
1950                         mode->sync &= ~FB_SYNC_HOR_HIGH_ACT;
1951                 } else {
1952                         sprintf(s, "hsync: Active High\n");
1953                         mode->sync |= FB_SYNC_HOR_HIGH_ACT;
1954                 }
1955         } else if (!strncmp(this_opt, "vsync:", 6)) {
1956                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1957                         sprintf(s, "vsync: Active Low\n");
1958                         mode->sync &= ~FB_SYNC_VERT_HIGH_ACT;
1959                 } else {
1960                         sprintf(s, "vsync: Active High\n");
1961                         mode->sync |= FB_SYNC_VERT_HIGH_ACT;
1962                 }
1963         } else if (!strncmp(this_opt, "dpc:", 4)) {
1964                 if (simple_strtoul(this_opt+4, NULL, 0) == 0) {
1965                         sprintf(s, "double pixel clock: false\n");
1966                         inf->lccr3 &= ~LCCR3_DPC;
1967                 } else {
1968                         sprintf(s, "double pixel clock: true\n");
1969                         inf->lccr3 |= LCCR3_DPC;
1970                 }
1971         } else if (!strncmp(this_opt, "outputen:", 9)) {
1972                 if (simple_strtoul(this_opt+9, NULL, 0) == 0) {
1973                         sprintf(s, "output enable: active low\n");
1974                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL;
1975                 } else {
1976                         sprintf(s, "output enable: active high\n");
1977                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH;
1978                 }
1979         } else if (!strncmp(this_opt, "pixclockpol:", 12)) {
1980                 if (simple_strtoul(this_opt+12, NULL, 0) == 0) {
1981                         sprintf(s, "pixel clock polarity: falling edge\n");
1982                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg;
1983                 } else {
1984                         sprintf(s, "pixel clock polarity: rising edge\n");
1985                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg;
1986                 }
1987         } else if (!strncmp(this_opt, "color", 5)) {
1988                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color;
1989         } else if (!strncmp(this_opt, "mono", 4)) {
1990                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono;
1991         } else if (!strncmp(this_opt, "active", 6)) {
1992                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act;
1993         } else if (!strncmp(this_opt, "passive", 7)) {
1994                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas;
1995         } else if (!strncmp(this_opt, "single", 6)) {
1996                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl;
1997         } else if (!strncmp(this_opt, "dual", 4)) {
1998                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual;
1999         } else if (!strncmp(this_opt, "4pix", 4)) {
2000                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
2001         } else if (!strncmp(this_opt, "8pix", 4)) {
2002                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
2003         } else {
2004                 dev_err(dev, "unknown option: %s\n", this_opt);
2005                 return -EINVAL;
2006         }
2007
2008         if (s[0] != '\0')
2009                 dev_info(dev, "override %s", s);
2010
2011         return 0;
2012 }
2013
2014 static int pxafb_parse_options(struct device *dev, char *options,
2015                                struct pxafb_mach_info *inf)
2016 {
2017         char *this_opt;
2018         int ret;
2019
2020         if (!options || !*options)
2021                 return 0;
2022
2023         dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
2024
2025         /* could be made table driven or similar?... */
2026         while ((this_opt = strsep(&options, ",")) != NULL) {
2027                 ret = parse_opt(dev, this_opt, inf);
2028                 if (ret)
2029                         return ret;
2030         }
2031         return 0;
2032 }
2033
2034 static char g_options[256] = "";
2035
2036 #ifndef MODULE
2037 static int __init pxafb_setup_options(void)
2038 {
2039         char *options = NULL;
2040
2041         if (fb_get_options("pxafb", &options))
2042                 return -ENODEV;
2043
2044         if (options)
2045                 strlcpy(g_options, options, sizeof(g_options));
2046
2047         return 0;
2048 }
2049 #else
2050 #define pxafb_setup_options()           (0)
2051
2052 module_param_string(options, g_options, sizeof(g_options), 0);
2053 MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.rst)");
2054 #endif
2055
2056 #else
2057 #define pxafb_parse_options(...)        (0)
2058 #define pxafb_setup_options()           (0)
2059 #endif
2060
2061 #ifdef DEBUG_VAR
2062 /* Check for various illegal bit-combinations. Currently only
2063  * a warning is given. */
2064 static void pxafb_check_options(struct device *dev, struct pxafb_mach_info *inf)
2065 {
2066         if (inf->lcd_conn)
2067                 return;
2068
2069         if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK)
2070                 dev_warn(dev, "machine LCCR0 setting contains "
2071                                 "illegal bits: %08x\n",
2072                         inf->lccr0 & LCCR0_INVALID_CONFIG_MASK);
2073         if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK)
2074                 dev_warn(dev, "machine LCCR3 setting contains "
2075                                 "illegal bits: %08x\n",
2076                         inf->lccr3 & LCCR3_INVALID_CONFIG_MASK);
2077         if (inf->lccr0 & LCCR0_DPD &&
2078             ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas ||
2079              (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl ||
2080              (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono))
2081                 dev_warn(dev, "Double Pixel Data (DPD) mode is "
2082                                 "only valid in passive mono"
2083                                 " single panel mode\n");
2084         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act &&
2085             (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual)
2086                 dev_warn(dev, "Dual panel only valid in passive mode\n");
2087         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas &&
2088              (inf->modes->upper_margin || inf->modes->lower_margin))
2089                 dev_warn(dev, "Upper and lower margins must be 0 in "
2090                                 "passive mode\n");
2091 }
2092 #else
2093 #define pxafb_check_options(...)        do {} while (0)
2094 #endif
2095
2096 #if defined(CONFIG_OF)
2097 static const char * const lcd_types[] = {
2098         "unknown", "mono-stn", "mono-dstn", "color-stn", "color-dstn",
2099         "color-tft", "smart-panel", NULL
2100 };
2101
2102 static int of_get_pxafb_display(struct device *dev, struct device_node *disp,
2103                                 struct pxafb_mach_info *info, u32 bus_width)
2104 {
2105         struct display_timings *timings;
2106         struct videomode vm;
2107         int i, ret = -EINVAL;
2108         const char *s;
2109
2110         ret = of_property_read_string(disp, "lcd-type", &s);
2111         if (ret)
2112                 s = "color-tft";
2113
2114         i = match_string(lcd_types, -1, s);
2115         if (i < 0) {
2116                 dev_err(dev, "lcd-type %s is unknown\n", s);
2117                 return i;
2118         }
2119         info->lcd_conn |= LCD_CONN_TYPE(i);
2120         info->lcd_conn |= LCD_CONN_WIDTH(bus_width);
2121
2122         timings = of_get_display_timings(disp);
2123         if (!timings)
2124                 return -EINVAL;
2125
2126         ret = -ENOMEM;
2127         info->modes = devm_kcalloc(dev, timings->num_timings,
2128                                    sizeof(info->modes[0]),
2129                                    GFP_KERNEL);
2130         if (!info->modes)
2131                 goto out;
2132         info->num_modes = timings->num_timings;
2133
2134         for (i = 0; i < timings->num_timings; i++) {
2135                 ret = videomode_from_timings(timings, &vm, i);
2136                 if (ret) {
2137                         dev_err(dev, "videomode_from_timings %d failed: %d\n",
2138                                 i, ret);
2139                         goto out;
2140                 }
2141                 if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
2142                         info->lcd_conn |= LCD_PCLK_EDGE_RISE;
2143                 if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
2144                         info->lcd_conn |= LCD_PCLK_EDGE_FALL;
2145                 if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
2146                         info->lcd_conn |= LCD_BIAS_ACTIVE_HIGH;
2147                 if (vm.flags & DISPLAY_FLAGS_DE_LOW)
2148                         info->lcd_conn |= LCD_BIAS_ACTIVE_LOW;
2149                 if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH)
2150                         info->modes[i].sync |= FB_SYNC_HOR_HIGH_ACT;
2151                 if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
2152                         info->modes[i].sync |= FB_SYNC_VERT_HIGH_ACT;
2153
2154                 info->modes[i].pixclock = 1000000000UL / (vm.pixelclock / 1000);
2155                 info->modes[i].xres = vm.hactive;
2156                 info->modes[i].yres = vm.vactive;
2157                 info->modes[i].hsync_len = vm.hsync_len;
2158                 info->modes[i].left_margin = vm.hback_porch;
2159                 info->modes[i].right_margin = vm.hfront_porch;
2160                 info->modes[i].vsync_len = vm.vsync_len;
2161                 info->modes[i].upper_margin = vm.vback_porch;
2162                 info->modes[i].lower_margin = vm.vfront_porch;
2163         }
2164         ret = 0;
2165
2166 out:
2167         display_timings_release(timings);
2168         return ret;
2169 }
2170
2171 static int of_get_pxafb_mode_info(struct device *dev,
2172                                   struct pxafb_mach_info *info)
2173 {
2174         struct device_node *display, *np;
2175         u32 bus_width;
2176         int ret, i;
2177
2178         np = of_graph_get_next_endpoint(dev->of_node, NULL);
2179         if (!np) {
2180                 dev_err(dev, "could not find endpoint\n");
2181                 return -EINVAL;
2182         }
2183         ret = of_property_read_u32(np, "bus-width", &bus_width);
2184         if (ret) {
2185                 dev_err(dev, "no bus-width specified: %d\n", ret);
2186                 of_node_put(np);
2187                 return ret;
2188         }
2189
2190         display = of_graph_get_remote_port_parent(np);
2191         of_node_put(np);
2192         if (!display) {
2193                 dev_err(dev, "no display defined\n");
2194                 return -EINVAL;
2195         }
2196
2197         ret = of_get_pxafb_display(dev, display, info, bus_width);
2198         of_node_put(display);
2199         if (ret)
2200                 return ret;
2201
2202         for (i = 0; i < info->num_modes; i++)
2203                 info->modes[i].bpp = bus_width;
2204
2205         return 0;
2206 }
2207
2208 static struct pxafb_mach_info *of_pxafb_of_mach_info(struct device *dev)
2209 {
2210         int ret;
2211         struct pxafb_mach_info *info;
2212
2213         if (!dev->of_node)
2214                 return NULL;
2215         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
2216         if (!info)
2217                 return ERR_PTR(-ENOMEM);
2218         ret = of_get_pxafb_mode_info(dev, info);
2219         if (ret)
2220                 return ERR_PTR(ret);
2221
2222         /*
2223          * On purpose, neither lccrX registers nor video memory size can be
2224          * specified through device-tree, they are considered more a debug hack
2225          * available through command line.
2226          */
2227         return info;
2228 }
2229 #else
2230 static struct pxafb_mach_info *of_pxafb_of_mach_info(struct device *dev)
2231 {
2232         return NULL;
2233 }
2234 #endif
2235
2236 static int pxafb_probe(struct platform_device *dev)
2237 {
2238         struct pxafb_info *fbi;
2239         struct pxafb_mach_info *inf, *pdata;
2240         int i, irq, ret;
2241
2242         dev_dbg(&dev->dev, "pxafb_probe\n");
2243
2244         ret = -ENOMEM;
2245         pdata = dev_get_platdata(&dev->dev);
2246         inf = devm_kmalloc(&dev->dev, sizeof(*inf), GFP_KERNEL);
2247         if (!inf)
2248                 goto failed;
2249
2250         if (pdata) {
2251                 *inf = *pdata;
2252                 inf->modes =
2253                         devm_kmalloc_array(&dev->dev, pdata->num_modes,
2254                                            sizeof(inf->modes[0]), GFP_KERNEL);
2255                 if (!inf->modes)
2256                         goto failed;
2257                 for (i = 0; i < inf->num_modes; i++)
2258                         inf->modes[i] = pdata->modes[i];
2259         } else {
2260                 inf = of_pxafb_of_mach_info(&dev->dev);
2261         }
2262
2263         if (IS_ERR_OR_NULL(inf))
2264                 goto failed;
2265
2266         ret = pxafb_parse_options(&dev->dev, g_options, inf);
2267         if (ret < 0)
2268                 goto failed;
2269
2270         pxafb_check_options(&dev->dev, inf);
2271
2272         dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n",
2273                         inf->modes->xres,
2274                         inf->modes->yres,
2275                         inf->modes->bpp);
2276         if (inf->modes->xres == 0 ||
2277             inf->modes->yres == 0 ||
2278             inf->modes->bpp == 0) {
2279                 dev_err(&dev->dev, "Invalid resolution or bit depth\n");
2280                 ret = -EINVAL;
2281                 goto failed;
2282         }
2283
2284         fbi = pxafb_init_fbinfo(&dev->dev, inf);
2285         if (IS_ERR(fbi)) {
2286                 dev_err(&dev->dev, "Failed to initialize framebuffer device\n");
2287                 ret = PTR_ERR(fbi);
2288                 goto failed;
2289         }
2290
2291         if (cpu_is_pxa3xx() && inf->acceleration_enabled)
2292                 fbi->fb.fix.accel = FB_ACCEL_PXA3XX;
2293
2294         fbi->backlight_power = inf->pxafb_backlight_power;
2295         fbi->lcd_power = inf->pxafb_lcd_power;
2296
2297         fbi->lcd_supply = devm_regulator_get_optional(&dev->dev, "lcd");
2298         if (IS_ERR(fbi->lcd_supply)) {
2299                 if (PTR_ERR(fbi->lcd_supply) == -EPROBE_DEFER)
2300                         return -EPROBE_DEFER;
2301
2302                 fbi->lcd_supply = NULL;
2303         }
2304
2305         fbi->mmio_base = devm_platform_ioremap_resource(dev, 0);
2306         if (IS_ERR(fbi->mmio_base)) {
2307                 dev_err(&dev->dev, "failed to get I/O memory\n");
2308                 ret = PTR_ERR(fbi->mmio_base);
2309                 goto failed;
2310         }
2311
2312         fbi->dma_buff_size = PAGE_ALIGN(sizeof(struct pxafb_dma_buff));
2313         fbi->dma_buff = dma_alloc_coherent(fbi->dev, fbi->dma_buff_size,
2314                                 &fbi->dma_buff_phys, GFP_KERNEL);
2315         if (fbi->dma_buff == NULL) {
2316                 dev_err(&dev->dev, "failed to allocate memory for DMA\n");
2317                 ret = -ENOMEM;
2318                 goto failed;
2319         }
2320
2321         ret = pxafb_init_video_memory(fbi);
2322         if (ret) {
2323                 dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret);
2324                 ret = -ENOMEM;
2325                 goto failed_free_dma;
2326         }
2327
2328         irq = platform_get_irq(dev, 0);
2329         if (irq < 0) {
2330                 dev_err(&dev->dev, "no IRQ defined\n");
2331                 ret = -ENODEV;
2332                 goto failed_free_mem;
2333         }
2334
2335         ret = devm_request_irq(&dev->dev, irq, pxafb_handle_irq, 0, "LCD", fbi);
2336         if (ret) {
2337                 dev_err(&dev->dev, "request_irq failed: %d\n", ret);
2338                 ret = -EBUSY;
2339                 goto failed_free_mem;
2340         }
2341
2342         ret = pxafb_smart_init(fbi);
2343         if (ret) {
2344                 dev_err(&dev->dev, "failed to initialize smartpanel\n");
2345                 goto failed_free_mem;
2346         }
2347
2348         /*
2349          * This makes sure that our colour bitfield
2350          * descriptors are correctly initialised.
2351          */
2352         ret = pxafb_check_var(&fbi->fb.var, &fbi->fb);
2353         if (ret) {
2354                 dev_err(&dev->dev, "failed to get suitable mode\n");
2355                 goto failed_free_mem;
2356         }
2357
2358         ret = pxafb_set_par(&fbi->fb);
2359         if (ret) {
2360                 dev_err(&dev->dev, "Failed to set parameters\n");
2361                 goto failed_free_mem;
2362         }
2363
2364         platform_set_drvdata(dev, fbi);
2365
2366         ret = register_framebuffer(&fbi->fb);
2367         if (ret < 0) {
2368                 dev_err(&dev->dev,
2369                         "Failed to register framebuffer device: %d\n", ret);
2370                 goto failed_free_cmap;
2371         }
2372
2373         pxafb_overlay_init(fbi);
2374
2375 #ifdef CONFIG_CPU_FREQ
2376         fbi->freq_transition.notifier_call = pxafb_freq_transition;
2377         cpufreq_register_notifier(&fbi->freq_transition,
2378                                 CPUFREQ_TRANSITION_NOTIFIER);
2379 #endif
2380
2381         /*
2382          * Ok, now enable the LCD controller
2383          */
2384         set_ctrlr_state(fbi, C_ENABLE);
2385
2386         return 0;
2387
2388 failed_free_cmap:
2389         if (fbi->fb.cmap.len)
2390                 fb_dealloc_cmap(&fbi->fb.cmap);
2391 failed_free_mem:
2392         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2393 failed_free_dma:
2394         dma_free_coherent(&dev->dev, fbi->dma_buff_size,
2395                         fbi->dma_buff, fbi->dma_buff_phys);
2396 failed:
2397         return ret;
2398 }
2399
2400 static int pxafb_remove(struct platform_device *dev)
2401 {
2402         struct pxafb_info *fbi = platform_get_drvdata(dev);
2403         struct fb_info *info;
2404
2405         if (!fbi)
2406                 return 0;
2407
2408         info = &fbi->fb;
2409
2410         pxafb_overlay_exit(fbi);
2411         unregister_framebuffer(info);
2412
2413         pxafb_disable_controller(fbi);
2414
2415         if (fbi->fb.cmap.len)
2416                 fb_dealloc_cmap(&fbi->fb.cmap);
2417
2418         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2419
2420         dma_free_coherent(&dev->dev, fbi->dma_buff_size, fbi->dma_buff,
2421                           fbi->dma_buff_phys);
2422
2423         return 0;
2424 }
2425
2426 static const struct of_device_id pxafb_of_dev_id[] = {
2427         { .compatible = "marvell,pxa270-lcdc", },
2428         { .compatible = "marvell,pxa300-lcdc", },
2429         { .compatible = "marvell,pxa2xx-lcdc", },
2430         { /* sentinel */ }
2431 };
2432 MODULE_DEVICE_TABLE(of, pxafb_of_dev_id);
2433
2434 static struct platform_driver pxafb_driver = {
2435         .probe          = pxafb_probe,
2436         .remove         = pxafb_remove,
2437         .driver         = {
2438                 .name   = "pxa2xx-fb",
2439                 .of_match_table = pxafb_of_dev_id,
2440 #ifdef CONFIG_PM
2441                 .pm     = &pxafb_pm_ops,
2442 #endif
2443         },
2444 };
2445
2446 static int __init pxafb_init(void)
2447 {
2448         if (pxafb_setup_options())
2449                 return -EINVAL;
2450
2451         return platform_driver_register(&pxafb_driver);
2452 }
2453
2454 static void __exit pxafb_exit(void)
2455 {
2456         platform_driver_unregister(&pxafb_driver);
2457 }
2458
2459 module_init(pxafb_init);
2460 module_exit(pxafb_exit);
2461
2462 MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
2463 MODULE_LICENSE("GPL");