drivers/video/fsl-diu-fb.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  *  Freescale DIU Frame Buffer device driver
   5  *
   6  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
   7  *           Paul Widmer <paul.widmer@freescale.com>
   8  *           Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
   9  *           York Sun <yorksun@freescale.com>
  10  *
  11  *   Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
  12  *
  13  * This program is free software; you can redistribute  it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/slab.h>
  25 #include <linux/fb.h>
  26 #include <linux/init.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/clk.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <linux/of_platform.h>
  35
  36 #include <sysdev/fsl_soc.h>
  37 #include "fsl-diu-fb.h"
  38
  39 /*
  40  * These parameters give default parameters
  41  * for video output 1024x768,
  42  * FIXME - change timing to proper amounts
  43  * hsync 31.5kHz, vsync 60Hz
  44  */
  45 static struct fb_videomode __devinitdata fsl_diu_default_mode = {
  46         .refresh        = 60,
  47         .xres           = 1024,
  48         .yres           = 768,
  49         .pixclock       = 15385,
  50         .left_margin    = 160,
  51         .right_margin   = 24,
  52         .upper_margin   = 29,
  53         .lower_margin   = 3,
  54         .hsync_len      = 136,
  55         .vsync_len      = 6,
  56         .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  57         .vmode          = FB_VMODE_NONINTERLACED
  58 };
  59
  60 static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
  61         {
  62                 .name           = "1024x768-60",
  63                 .refresh        = 60,
  64                 .xres           = 1024,
  65                 .yres           = 768,
  66                 .pixclock       = 15385,
  67                 .left_margin    = 160,
  68                 .right_margin   = 24,
  69                 .upper_margin   = 29,
  70                 .lower_margin   = 3,
  71                 .hsync_len      = 136,
  72                 .vsync_len      = 6,
  73                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  74                 .vmode          = FB_VMODE_NONINTERLACED
  75         },
  76         {
  77                 .name           = "1024x768-70",
  78                 .refresh        = 70,
  79                 .xres           = 1024,
  80                 .yres           = 768,
  81                 .pixclock       = 16886,
  82                 .left_margin    = 3,
  83                 .right_margin   = 3,
  84                 .upper_margin   = 2,
  85                 .lower_margin   = 2,
  86                 .hsync_len      = 40,
  87                 .vsync_len      = 18,
  88                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  89                 .vmode          = FB_VMODE_NONINTERLACED
  90         },
  91         {
  92                 .name           = "1024x768-75",
  93                 .refresh        = 75,
  94                 .xres           = 1024,
  95                 .yres           = 768,
  96                 .pixclock       = 15009,
  97                 .left_margin    = 3,
  98                 .right_margin   = 3,
  99                 .upper_margin   = 2,
 100                 .lower_margin   = 2,
 101                 .hsync_len      = 80,
 102                 .vsync_len      = 32,
 103                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 104                 .vmode          = FB_VMODE_NONINTERLACED
 105         },
 106         {
 107                 .name           = "1280x1024-60",
 108                 .refresh        = 60,
 109                 .xres           = 1280,
 110                 .yres           = 1024,
 111                 .pixclock       = 9375,
 112                 .left_margin    = 38,
 113                 .right_margin   = 128,
 114                 .upper_margin   = 2,
 115                 .lower_margin   = 7,
 116                 .hsync_len      = 216,
 117                 .vsync_len      = 37,
 118                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 119                 .vmode          = FB_VMODE_NONINTERLACED
 120         },
 121         {
 122                 .name           = "1280x1024-70",
 123                 .refresh        = 70,
 124                 .xres           = 1280,
 125                 .yres           = 1024,
 126                 .pixclock       = 9380,
 127                 .left_margin    = 6,
 128                 .right_margin   = 6,
 129                 .upper_margin   = 4,
 130                 .lower_margin   = 4,
 131                 .hsync_len      = 60,
 132                 .vsync_len      = 94,
 133                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 134                 .vmode          = FB_VMODE_NONINTERLACED
 135         },
 136         {
 137                 .name           = "1280x1024-75",
 138                 .refresh        = 75,
 139                 .xres           = 1280,
 140                 .yres           = 1024,
 141                 .pixclock       = 9380,
 142                 .left_margin    = 6,
 143                 .right_margin   = 6,
 144                 .upper_margin   = 4,
 145                 .lower_margin   = 4,
 146                 .hsync_len      = 60,
 147                 .vsync_len      = 15,
 148                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 149                 .vmode          = FB_VMODE_NONINTERLACED
 150         },
 151         {
 152                 .name           = "320x240",            /* for AOI only */
 153                 .refresh        = 60,
 154                 .xres           = 320,
 155                 .yres           = 240,
 156                 .pixclock       = 15385,
 157                 .left_margin    = 0,
 158                 .right_margin   = 0,
 159                 .upper_margin   = 0,
 160                 .lower_margin   = 0,
 161                 .hsync_len      = 0,
 162                 .vsync_len      = 0,
 163                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 164                 .vmode          = FB_VMODE_NONINTERLACED
 165         },
 166         {
 167                 .name           = "1280x480-60",
 168                 .refresh        = 60,
 169                 .xres           = 1280,
 170                 .yres           = 480,
 171                 .pixclock       = 18939,
 172                 .left_margin    = 353,
 173                 .right_margin   = 47,
 174                 .upper_margin   = 39,
 175                 .lower_margin   = 4,
 176                 .hsync_len      = 8,
 177                 .vsync_len      = 2,
 178                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 179                 .vmode          = FB_VMODE_NONINTERLACED
 180         },
 181 };
 182
 183 static char *fb_mode = "1024x768-32@60";
 184 static unsigned long default_bpp = 32;
 185 static int monitor_port;
 186
 187 #if defined(CONFIG_NOT_COHERENT_CACHE)
 188 static u8 *coherence_data;
 189 static size_t coherence_data_size;
 190 static unsigned int d_cache_line_size;
 191 #endif
 192
 193 static DEFINE_SPINLOCK(diu_lock);
 194
 195 struct fsl_diu_data {
 196         struct fb_info *fsl_diu_info[FSL_AOI_NUM - 1];
 197                                 /*FSL_AOI_NUM has one dummy AOI */
 198         struct device_attribute dev_attr;
 199         struct diu_ad *dummy_ad;
 200         void *dummy_aoi_virt;
 201         unsigned int irq;
 202         int fb_enabled;
 203         int monitor_port;
 204 };
 205
 206 struct mfb_info {
 207         int index;
 208         int type;
 209         char *id;
 210         int registered;
 211         int blank;
 212         unsigned long pseudo_palette[16];
 213         struct diu_ad *ad;
 214         int cursor_reset;
 215         unsigned char g_alpha;
 216         unsigned int count;
 217         int x_aoi_d;            /* aoi display x offset to physical screen */
 218         int y_aoi_d;            /* aoi display y offset to physical screen */
 219         struct fsl_diu_data *parent;
 220 };
 221
 222
 223 static struct mfb_info mfb_template[] = {
 224         {               /* AOI 0 for plane 0 */
 225         .index = 0,
 226         .type = MFB_TYPE_OUTPUT,
 227         .id = "Panel0",
 228         .registered = 0,
 229         .count = 0,
 230         .x_aoi_d = 0,
 231         .y_aoi_d = 0,
 232         },
 233         {               /* AOI 0 for plane 1 */
 234         .index = 1,
 235         .type = MFB_TYPE_OUTPUT,
 236         .id = "Panel1 AOI0",
 237         .registered = 0,
 238         .g_alpha = 0xff,
 239         .count = 0,
 240         .x_aoi_d = 0,
 241         .y_aoi_d = 0,
 242         },
 243         {               /* AOI 1 for plane 1 */
 244         .index = 2,
 245         .type = MFB_TYPE_OUTPUT,
 246         .id = "Panel1 AOI1",
 247         .registered = 0,
 248         .g_alpha = 0xff,
 249         .count = 0,
 250         .x_aoi_d = 0,
 251         .y_aoi_d = 480,
 252         },
 253         {               /* AOI 0 for plane 2 */
 254         .index = 3,
 255         .type = MFB_TYPE_OUTPUT,
 256         .id = "Panel2 AOI0",
 257         .registered = 0,
 258         .g_alpha = 0xff,
 259         .count = 0,
 260         .x_aoi_d = 640,
 261         .y_aoi_d = 0,
 262         },
 263         {               /* AOI 1 for plane 2 */
 264         .index = 4,
 265         .type = MFB_TYPE_OUTPUT,
 266         .id = "Panel2 AOI1",
 267         .registered = 0,
 268         .g_alpha = 0xff,
 269         .count = 0,
 270         .x_aoi_d = 640,
 271         .y_aoi_d = 480,
 272         },
 273 };
 274
 275 static struct diu_hw dr = {
 276         .mode = MFB_MODE1,
 277         .reg_lock = __SPIN_LOCK_UNLOCKED(diu_hw.reg_lock),
 278 };
 279
 280 static struct diu_pool pool;
 281
 282 /**
 283  * fsl_diu_alloc - allocate memory for the DIU
 284  * @size: number of bytes to allocate
 285  * @param: returned physical address of memory
 286  *
 287  * This function allocates a physically-contiguous block of memory.
 288  */
 289 static void *fsl_diu_alloc(size_t size, phys_addr_t *phys)
 290 {
 291         void *virt;
 292
 293         pr_debug("size=%zu\n", size);
 294
 295         virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
 296         if (virt) {
 297                 *phys = virt_to_phys(virt);
 298                 pr_debug("virt=%p phys=%llx\n", virt,
 299                         (unsigned long long)*phys);
 300         }
 301
 302         return virt;
 303 }
 304
 305 /**
 306  * fsl_diu_free - release DIU memory
 307  * @virt: pointer returned by fsl_diu_alloc()
 308  * @size: number of bytes allocated by fsl_diu_alloc()
 309  *
 310  * This function releases memory allocated by fsl_diu_alloc().
 311  */
 312 static void fsl_diu_free(void *virt, size_t size)
 313 {
 314         pr_debug("virt=%p size=%zu\n", virt, size);
 315
 316         if (virt && size)
 317                 free_pages_exact(virt, size);
 318 }
 319
 320 static int fsl_diu_enable_panel(struct fb_info *info)
 321 {
 322         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 323         struct diu *hw = dr.diu_reg;
 324         struct diu_ad *ad = mfbi->ad;
 325         struct fsl_diu_data *machine_data = mfbi->parent;
 326         int res = 0;
 327
 328         pr_debug("enable_panel index %d\n", mfbi->index);
 329         if (mfbi->type != MFB_TYPE_OFF) {
 330                 switch (mfbi->index) {
 331                 case 0:                         /* plane 0 */
 332                         if (hw->desc[0] != ad->paddr)
 333                                 out_be32(&hw->desc[0], ad->paddr);
 334                         break;
 335                 case 1:                         /* plane 1 AOI 0 */
 336                         cmfbi = machine_data->fsl_diu_info[2]->par;
 337                         if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
 338                                 if (cmfbi->count > 0)   /* AOI1 open */
 339                                         ad->next_ad =
 340                                                 cpu_to_le32(cmfbi->ad->paddr);
 341                                 else
 342                                         ad->next_ad = 0;
 343                                 out_be32(&hw->desc[1], ad->paddr);
 344                         }
 345                         break;
 346                 case 3:                         /* plane 2 AOI 0 */
 347                         cmfbi = machine_data->fsl_diu_info[4]->par;
 348                         if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
 349                                 if (cmfbi->count > 0)   /* AOI1 open */
 350                                         ad->next_ad =
 351                                                 cpu_to_le32(cmfbi->ad->paddr);
 352                                 else
 353                                         ad->next_ad = 0;
 354                                 out_be32(&hw->desc[2], ad->paddr);
 355                         }
 356                         break;
 357                 case 2:                         /* plane 1 AOI 1 */
 358                         pmfbi = machine_data->fsl_diu_info[1]->par;
 359                         ad->next_ad = 0;
 360                         if (hw->desc[1] == machine_data->dummy_ad->paddr)
 361                                 out_be32(&hw->desc[1], ad->paddr);
 362                         else                                    /* AOI0 open */
 363                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 364                         break;
 365                 case 4:                         /* plane 2 AOI 1 */
 366                         pmfbi = machine_data->fsl_diu_info[3]->par;
 367                         ad->next_ad = 0;
 368                         if (hw->desc[2] == machine_data->dummy_ad->paddr)
 369                                 out_be32(&hw->desc[2], ad->paddr);
 370                         else                            /* AOI0 was open */
 371                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 372                         break;
 373                 default:
 374                         res = -EINVAL;
 375                         break;
 376                 }
 377         } else
 378                 res = -EINVAL;
 379         return res;
 380 }
 381
 382 static int fsl_diu_disable_panel(struct fb_info *info)
 383 {
 384         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 385         struct diu *hw = dr.diu_reg;
 386         struct diu_ad *ad = mfbi->ad;
 387         struct fsl_diu_data *machine_data = mfbi->parent;
 388         int res = 0;
 389
 390         switch (mfbi->index) {
 391         case 0:                                 /* plane 0 */
 392                 if (hw->desc[0] != machine_data->dummy_ad->paddr)
 393                         out_be32(&hw->desc[0],
 394                                 machine_data->dummy_ad->paddr);
 395                 break;
 396         case 1:                                 /* plane 1 AOI 0 */
 397                 cmfbi = machine_data->fsl_diu_info[2]->par;
 398                 if (cmfbi->count > 0)   /* AOI1 is open */
 399                         out_be32(&hw->desc[1], cmfbi->ad->paddr);
 400                                         /* move AOI1 to the first */
 401                 else                    /* AOI1 was closed */
 402                         out_be32(&hw->desc[1],
 403                                 machine_data->dummy_ad->paddr);
 404                                         /* close AOI 0 */
 405                 break;
 406         case 3:                                 /* plane 2 AOI 0 */
 407                 cmfbi = machine_data->fsl_diu_info[4]->par;
 408                 if (cmfbi->count > 0)   /* AOI1 is open */
 409                         out_be32(&hw->desc[2], cmfbi->ad->paddr);
 410                                         /* move AOI1 to the first */
 411                 else                    /* AOI1 was closed */
 412                         out_be32(&hw->desc[2],
 413                                 machine_data->dummy_ad->paddr);
 414                                         /* close AOI 0 */
 415                 break;
 416         case 2:                                 /* plane 1 AOI 1 */
 417                 pmfbi = machine_data->fsl_diu_info[1]->par;
 418                 if (hw->desc[1] != ad->paddr) {
 419                                 /* AOI1 is not the first in the chain */
 420                         if (pmfbi->count > 0)
 421                                         /* AOI0 is open, must be the first */
 422                                 pmfbi->ad->next_ad = 0;
 423                 } else                  /* AOI1 is the first in the chain */
 424                         out_be32(&hw->desc[1], machine_data->dummy_ad->paddr);
 425                                         /* close AOI 1 */
 426                 break;
 427         case 4:                                 /* plane 2 AOI 1 */
 428                 pmfbi = machine_data->fsl_diu_info[3]->par;
 429                 if (hw->desc[2] != ad->paddr) {
 430                                 /* AOI1 is not the first in the chain */
 431                         if (pmfbi->count > 0)
 432                                 /* AOI0 is open, must be the first */
 433                                 pmfbi->ad->next_ad = 0;
 434                 } else          /* AOI1 is the first in the chain */
 435                         out_be32(&hw->desc[2], machine_data->dummy_ad->paddr);
 436                                 /* close AOI 1 */
 437                 break;
 438         default:
 439                 res = -EINVAL;
 440                 break;
 441         }
 442
 443         return res;
 444 }
 445
 446 static void enable_lcdc(struct fb_info *info)
 447 {
 448         struct diu *hw = dr.diu_reg;
 449         struct mfb_info *mfbi = info->par;
 450         struct fsl_diu_data *machine_data = mfbi->parent;
 451
 452         if (!machine_data->fb_enabled) {
 453                 out_be32(&hw->diu_mode, dr.mode);
 454                 machine_data->fb_enabled++;
 455         }
 456 }
 457
 458 static void disable_lcdc(struct fb_info *info)
 459 {
 460         struct diu *hw = dr.diu_reg;
 461         struct mfb_info *mfbi = info->par;
 462         struct fsl_diu_data *machine_data = mfbi->parent;
 463
 464         if (machine_data->fb_enabled) {
 465                 out_be32(&hw->diu_mode, 0);
 466                 machine_data->fb_enabled = 0;
 467         }
 468 }
 469
 470 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 471                                 struct fb_info *info)
 472 {
 473         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
 474         struct fsl_diu_data *machine_data = mfbi->parent;
 475         int available_height, upper_aoi_bottom, index = mfbi->index;
 476         int lower_aoi_is_open, upper_aoi_is_open;
 477         __u32 base_plane_width, base_plane_height, upper_aoi_height;
 478
 479         base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
 480         base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
 481
 482         if (mfbi->x_aoi_d < 0)
 483                 mfbi->x_aoi_d = 0;
 484         if (mfbi->y_aoi_d < 0)
 485                 mfbi->y_aoi_d = 0;
 486         switch (index) {
 487         case 0:
 488                 if (mfbi->x_aoi_d != 0)
 489                         mfbi->x_aoi_d = 0;
 490                 if (mfbi->y_aoi_d != 0)
 491                         mfbi->y_aoi_d = 0;
 492                 break;
 493         case 1:                 /* AOI 0 */
 494         case 3:
 495                 lower_aoi_mfbi = machine_data->fsl_diu_info[index+1]->par;
 496                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
 497                 if (var->xres > base_plane_width)
 498                         var->xres = base_plane_width;
 499                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 500                         mfbi->x_aoi_d = base_plane_width - var->xres;
 501
 502                 if (lower_aoi_is_open)
 503                         available_height = lower_aoi_mfbi->y_aoi_d;
 504                 else
 505                         available_height = base_plane_height;
 506                 if (var->yres > available_height)
 507                         var->yres = available_height;
 508                 if ((mfbi->y_aoi_d + var->yres) > available_height)
 509                         mfbi->y_aoi_d = available_height - var->yres;
 510                 break;
 511         case 2:                 /* AOI 1 */
 512         case 4:
 513                 upper_aoi_mfbi = machine_data->fsl_diu_info[index-1]->par;
 514                 upper_aoi_height =
 515                                 machine_data->fsl_diu_info[index-1]->var.yres;
 516                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
 517                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
 518                 if (var->xres > base_plane_width)
 519                         var->xres = base_plane_width;
 520                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 521                         mfbi->x_aoi_d = base_plane_width - var->xres;
 522                 if (mfbi->y_aoi_d < 0)
 523                         mfbi->y_aoi_d = 0;
 524                 if (upper_aoi_is_open) {
 525                         if (mfbi->y_aoi_d < upper_aoi_bottom)
 526                                 mfbi->y_aoi_d = upper_aoi_bottom;
 527                         available_height = base_plane_height
 528                                                 - upper_aoi_bottom;
 529                 } else
 530                         available_height = base_plane_height;
 531                 if (var->yres > available_height)
 532                         var->yres = available_height;
 533                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
 534                         mfbi->y_aoi_d = base_plane_height - var->yres;
 535                 break;
 536         }
 537 }
 538 /*
 539  * Checks to see if the hardware supports the state requested by var passed
 540  * in. This function does not alter the hardware state! If the var passed in
 541  * is slightly off by what the hardware can support then we alter the var
 542  * PASSED in to what we can do. If the hardware doesn't support mode change
 543  * a -EINVAL will be returned by the upper layers.
 544  */
 545 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 546                                 struct fb_info *info)
 547 {
 548         unsigned long htotal, vtotal;
 549
 550         pr_debug("check_var xres: %d\n", var->xres);
 551         pr_debug("check_var yres: %d\n", var->yres);
 552
 553         if (var->xres_virtual < var->xres)
 554                 var->xres_virtual = var->xres;
 555         if (var->yres_virtual < var->yres)
 556                 var->yres_virtual = var->yres;
 557
 558         if (var->xoffset < 0)
 559                 var->xoffset = 0;
 560
 561         if (var->yoffset < 0)
 562                 var->yoffset = 0;
 563
 564         if (var->xoffset + info->var.xres > info->var.xres_virtual)
 565                 var->xoffset = info->var.xres_virtual - info->var.xres;
 566
 567         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 568                 var->yoffset = info->var.yres_virtual - info->var.yres;
 569
 570         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 571             (var->bits_per_pixel != 16))
 572                 var->bits_per_pixel = default_bpp;
 573
 574         switch (var->bits_per_pixel) {
 575         case 16:
 576                 var->red.length = 5;
 577                 var->red.offset = 11;
 578                 var->red.msb_right = 0;
 579
 580                 var->green.length = 6;
 581                 var->green.offset = 5;
 582                 var->green.msb_right = 0;
 583
 584                 var->blue.length = 5;
 585                 var->blue.offset = 0;
 586                 var->blue.msb_right = 0;
 587
 588                 var->transp.length = 0;
 589                 var->transp.offset = 0;
 590                 var->transp.msb_right = 0;
 591                 break;
 592         case 24:
 593                 var->red.length = 8;
 594                 var->red.offset = 0;
 595                 var->red.msb_right = 0;
 596
 597                 var->green.length = 8;
 598                 var->green.offset = 8;
 599                 var->green.msb_right = 0;
 600
 601                 var->blue.length = 8;
 602                 var->blue.offset = 16;
 603                 var->blue.msb_right = 0;
 604
 605                 var->transp.length = 0;
 606                 var->transp.offset = 0;
 607                 var->transp.msb_right = 0;
 608                 break;
 609         case 32:
 610                 var->red.length = 8;
 611                 var->red.offset = 16;
 612                 var->red.msb_right = 0;
 613
 614                 var->green.length = 8;
 615                 var->green.offset = 8;
 616                 var->green.msb_right = 0;
 617
 618                 var->blue.length = 8;
 619                 var->blue.offset = 0;
 620                 var->blue.msb_right = 0;
 621
 622                 var->transp.length = 8;
 623                 var->transp.offset = 24;
 624                 var->transp.msb_right = 0;
 625
 626                 break;
 627         }
 628         /* If the pixclock is below the minimum spec'd value then set to
 629          * refresh rate for 60Hz since this is supported by most monitors.
 630          * Refer to Documentation/fb/ for calculations.
 631          */
 632         if ((var->pixclock < MIN_PIX_CLK) || (var->pixclock > MAX_PIX_CLK)) {
 633                 htotal = var->xres + var->right_margin + var->hsync_len +
 634                     var->left_margin;
 635                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 636                     var->upper_margin;
 637                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 638                 var->pixclock = KHZ2PICOS(var->pixclock);
 639                 pr_debug("pixclock set for 60Hz refresh = %u ps\n",
 640                         var->pixclock);
 641         }
 642
 643         var->height = -1;
 644         var->width = -1;
 645         var->grayscale = 0;
 646
 647         /* Copy nonstd field to/from sync for fbset usage */
 648         var->sync |= var->nonstd;
 649         var->nonstd |= var->sync;
 650
 651         adjust_aoi_size_position(var, info);
 652         return 0;
 653 }
 654
 655 static void set_fix(struct fb_info *info)
 656 {
 657         struct fb_fix_screeninfo *fix = &info->fix;
 658         struct fb_var_screeninfo *var = &info->var;
 659         struct mfb_info *mfbi = info->par;
 660
 661         strncpy(fix->id, mfbi->id, strlen(mfbi->id));
 662         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 663         fix->type = FB_TYPE_PACKED_PIXELS;
 664         fix->accel = FB_ACCEL_NONE;
 665         fix->visual = FB_VISUAL_TRUECOLOR;
 666         fix->xpanstep = 1;
 667         fix->ypanstep = 1;
 668 }
 669
 670 static void update_lcdc(struct fb_info *info)
 671 {
 672         struct fb_var_screeninfo *var = &info->var;
 673         struct mfb_info *mfbi = info->par;
 674         struct fsl_diu_data *machine_data = mfbi->parent;
 675         struct diu *hw;
 676         int i, j;
 677         char __iomem *cursor_base, *gamma_table_base;
 678
 679         u32 temp;
 680
 681         hw = dr.diu_reg;
 682
 683         if (mfbi->type == MFB_TYPE_OFF) {
 684                 fsl_diu_disable_panel(info);
 685                 return;
 686         }
 687
 688         diu_ops.set_monitor_port(machine_data->monitor_port);
 689         gamma_table_base = pool.gamma.vaddr;
 690         cursor_base = pool.cursor.vaddr;
 691         /* Prep for DIU init  - gamma table, cursor table */
 692
 693         for (i = 0; i <= 2; i++)
 694            for (j = 0; j <= 255; j++)
 695               *gamma_table_base++ = j;
 696
 697         diu_ops.set_gamma_table(machine_data->monitor_port, pool.gamma.vaddr);
 698
 699         pr_debug("update-lcdc: HW - %p\n Disabling DIU\n", hw);
 700         disable_lcdc(info);
 701
 702         /* Program DIU registers */
 703
 704         out_be32(&hw->gamma, pool.gamma.paddr);
 705         out_be32(&hw->cursor, pool.cursor.paddr);
 706
 707         out_be32(&hw->bgnd, 0x007F7F7F);        /* BGND */
 708         out_be32(&hw->bgnd_wb, 0);              /* BGND_WB */
 709         out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
 710                                                 /* DISP SIZE */
 711         pr_debug("DIU xres: %d\n", var->xres);
 712         pr_debug("DIU yres: %d\n", var->yres);
 713
 714         out_be32(&hw->wb_size, 0); /* WB SIZE */
 715         out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
 716
 717         /* Horizontal and vertical configuration register */
 718         temp = var->left_margin << 22 | /* BP_H */
 719                var->hsync_len << 11 |   /* PW_H */
 720                var->right_margin;       /* FP_H */
 721
 722         out_be32(&hw->hsyn_para, temp);
 723
 724         temp = var->upper_margin << 22 | /* BP_V */
 725                var->vsync_len << 11 |    /* PW_V  */
 726                var->lower_margin;        /* FP_V  */
 727
 728         out_be32(&hw->vsyn_para, temp);
 729
 730         pr_debug("DIU right_margin - %d\n", var->right_margin);
 731         pr_debug("DIU left_margin - %d\n", var->left_margin);
 732         pr_debug("DIU hsync_len - %d\n", var->hsync_len);
 733         pr_debug("DIU upper_margin - %d\n", var->upper_margin);
 734         pr_debug("DIU lower_margin - %d\n", var->lower_margin);
 735         pr_debug("DIU vsync_len - %d\n", var->vsync_len);
 736         pr_debug("DIU HSYNC - 0x%08x\n", hw->hsyn_para);
 737         pr_debug("DIU VSYNC - 0x%08x\n", hw->vsyn_para);
 738
 739         diu_ops.set_pixel_clock(var->pixclock);
 740
 741         out_be32(&hw->syn_pol, 0);      /* SYNC SIGNALS POLARITY */
 742         out_be32(&hw->thresholds, 0x00037800); /* The Thresholds */
 743         out_be32(&hw->int_status, 0);   /* INTERRUPT STATUS */
 744         out_be32(&hw->plut, 0x01F5F666);
 745
 746         /* Enable the DIU */
 747         enable_lcdc(info);
 748 }
 749
 750 static int map_video_memory(struct fb_info *info)
 751 {
 752         phys_addr_t phys;
 753         u32 smem_len = info->fix.line_length * info->var.yres_virtual;
 754
 755         pr_debug("info->var.xres_virtual = %d\n", info->var.xres_virtual);
 756         pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
 757         pr_debug("info->fix.line_length  = %d\n", info->fix.line_length);
 758         pr_debug("MAP_VIDEO_MEMORY: smem_len = %u\n", smem_len);
 759
 760         info->screen_base = fsl_diu_alloc(smem_len, &phys);
 761         if (info->screen_base == NULL) {
 762                 printk(KERN_ERR "Unable to allocate fb memory\n");
 763                 return -ENOMEM;
 764         }
 765         mutex_lock(&info->mm_lock);
 766         info->fix.smem_start = (unsigned long) phys;
 767         info->fix.smem_len = smem_len;
 768         mutex_unlock(&info->mm_lock);
 769         info->screen_size = info->fix.smem_len;
 770
 771         pr_debug("Allocated fb @ paddr=0x%08lx, size=%d.\n",
 772                  info->fix.smem_start, info->fix.smem_len);
 773         pr_debug("screen base %p\n", info->screen_base);
 774
 775         return 0;
 776 }
 777
 778 static void unmap_video_memory(struct fb_info *info)
 779 {
 780         fsl_diu_free(info->screen_base, info->fix.smem_len);
 781         mutex_lock(&info->mm_lock);
 782         info->screen_base = NULL;
 783         info->fix.smem_start = 0;
 784         info->fix.smem_len = 0;
 785         mutex_unlock(&info->mm_lock);
 786 }
 787
 788 /*
 789  * Using the fb_var_screeninfo in fb_info we set the aoi of this
 790  * particular framebuffer. It is a light version of fsl_diu_set_par.
 791  */
 792 static int fsl_diu_set_aoi(struct fb_info *info)
 793 {
 794         struct fb_var_screeninfo *var = &info->var;
 795         struct mfb_info *mfbi = info->par;
 796         struct diu_ad *ad = mfbi->ad;
 797
 798         /* AOI should not be greater than display size */
 799         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 800         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 801         return 0;
 802 }
 803
 804 /*
 805  * Using the fb_var_screeninfo in fb_info we set the resolution of this
 806  * particular framebuffer. This function alters the fb_fix_screeninfo stored
 807  * in fb_info. It does not alter var in fb_info since we are using that
 808  * data. This means we depend on the data in var inside fb_info to be
 809  * supported by the hardware. fsl_diu_check_var is always called before
 810  * fsl_diu_set_par to ensure this.
 811  */
 812 static int fsl_diu_set_par(struct fb_info *info)
 813 {
 814         unsigned long len;
 815         struct fb_var_screeninfo *var = &info->var;
 816         struct mfb_info *mfbi = info->par;
 817         struct fsl_diu_data *machine_data = mfbi->parent;
 818         struct diu_ad *ad = mfbi->ad;
 819         struct diu *hw;
 820
 821         hw = dr.diu_reg;
 822
 823         set_fix(info);
 824         mfbi->cursor_reset = 1;
 825
 826         len = info->var.yres_virtual * info->fix.line_length;
 827         /* Alloc & dealloc each time resolution/bpp change */
 828         if (len != info->fix.smem_len) {
 829                 if (info->fix.smem_start)
 830                         unmap_video_memory(info);
 831                 pr_debug("SET PAR: smem_len = %d\n", info->fix.smem_len);
 832
 833                 /* Memory allocation for framebuffer */
 834                 if (map_video_memory(info)) {
 835                         printk(KERN_ERR "Unable to allocate fb memory 1\n");
 836                         return -ENOMEM;
 837                 }
 838         }
 839
 840         ad->pix_fmt =
 841                 diu_ops.get_pixel_format(var->bits_per_pixel,
 842                                          machine_data->monitor_port);
 843         ad->addr    = cpu_to_le32(info->fix.smem_start);
 844         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
 845                                 var->xres_virtual) | mfbi->g_alpha;
 846         /* AOI should not be greater than display size */
 847         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
 848         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 849         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 850
 851         /* Disable chroma keying function */
 852         ad->ckmax_r = 0;
 853         ad->ckmax_g = 0;
 854         ad->ckmax_b = 0;
 855
 856         ad->ckmin_r = 255;
 857         ad->ckmin_g = 255;
 858         ad->ckmin_b = 255;
 859
 860         if (mfbi->index == 0)
 861                 update_lcdc(info);
 862         return 0;
 863 }
 864
 865 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
 866 {
 867         return ((val<<width) + 0x7FFF - val)>>16;
 868 }
 869
 870 /*
 871  * Set a single color register. The values supplied have a 16 bit magnitude
 872  * which needs to be scaled in this function for the hardware. Things to take
 873  * into consideration are how many color registers, if any, are supported with
 874  * the current color visual. With truecolor mode no color palettes are
 875  * supported. Here a psuedo palette is created which we store the value in
 876  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
 877  * color palette.
 878  */
 879 static int fsl_diu_setcolreg(unsigned regno, unsigned red, unsigned green,
 880                            unsigned blue, unsigned transp, struct fb_info *info)
 881 {
 882         int ret = 1;
 883
 884         /*
 885          * If greyscale is true, then we convert the RGB value
 886          * to greyscale no matter what visual we are using.
 887          */
 888         if (info->var.grayscale)
 889                 red = green = blue = (19595 * red + 38470 * green +
 890                                       7471 * blue) >> 16;
 891         switch (info->fix.visual) {
 892         case FB_VISUAL_TRUECOLOR:
 893                 /*
 894                  * 16-bit True Colour.  We encode the RGB value
 895                  * according to the RGB bitfield information.
 896                  */
 897                 if (regno < 16) {
 898                         u32 *pal = info->pseudo_palette;
 899                         u32 v;
 900
 901                         red = CNVT_TOHW(red, info->var.red.length);
 902                         green = CNVT_TOHW(green, info->var.green.length);
 903                         blue = CNVT_TOHW(blue, info->var.blue.length);
 904                         transp = CNVT_TOHW(transp, info->var.transp.length);
 905
 906                         v = (red << info->var.red.offset) |
 907                             (green << info->var.green.offset) |
 908                             (blue << info->var.blue.offset) |
 909                             (transp << info->var.transp.offset);
 910
 911                         pal[regno] = v;
 912                         ret = 0;
 913                 }
 914                 break;
 915         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 916         case FB_VISUAL_PSEUDOCOLOR:
 917                 break;
 918         }
 919
 920         return ret;
 921 }
 922
 923 /*
 924  * Pan (or wrap, depending on the `vmode' field) the display using the
 925  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
 926  * don't fit, return -EINVAL.
 927  */
 928 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
 929                              struct fb_info *info)
 930 {
 931         if ((info->var.xoffset == var->xoffset) &&
 932             (info->var.yoffset == var->yoffset))
 933                 return 0;       /* No change, do nothing */
 934
 935         if (var->xoffset < 0 || var->yoffset < 0
 936             || var->xoffset + info->var.xres > info->var.xres_virtual
 937             || var->yoffset + info->var.yres > info->var.yres_virtual)
 938                 return -EINVAL;
 939
 940         info->var.xoffset = var->xoffset;
 941         info->var.yoffset = var->yoffset;
 942
 943         if (var->vmode & FB_VMODE_YWRAP)
 944                 info->var.vmode |= FB_VMODE_YWRAP;
 945         else
 946                 info->var.vmode &= ~FB_VMODE_YWRAP;
 947
 948         fsl_diu_set_aoi(info);
 949
 950         return 0;
 951 }
 952
 953 /*
 954  * Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
 955  * succeeded, != 0 if un-/blanking failed.
 956  * blank_mode == 2: suspend vsync
 957  * blank_mode == 3: suspend hsync
 958  * blank_mode == 4: powerdown
 959  */
 960 static int fsl_diu_blank(int blank_mode, struct fb_info *info)
 961 {
 962         struct mfb_info *mfbi = info->par;
 963
 964         mfbi->blank = blank_mode;
 965
 966         switch (blank_mode) {
 967         case FB_BLANK_VSYNC_SUSPEND:
 968         case FB_BLANK_HSYNC_SUSPEND:
 969         /* FIXME: fixes to enable_panel and enable lcdc needed */
 970         case FB_BLANK_NORMAL:
 971         /*      fsl_diu_disable_panel(info);*/
 972                 break;
 973         case FB_BLANK_POWERDOWN:
 974         /*      disable_lcdc(info);     */
 975                 break;
 976         case FB_BLANK_UNBLANK:
 977         /*      fsl_diu_enable_panel(info);*/
 978                 break;
 979         }
 980
 981         return 0;
 982 }
 983
 984 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 985                        unsigned long arg)
 986 {
 987         struct mfb_info *mfbi = info->par;
 988         struct diu_ad *ad = mfbi->ad;
 989         struct mfb_chroma_key ck;
 990         unsigned char global_alpha;
 991         struct aoi_display_offset aoi_d;
 992         __u32 pix_fmt;
 993         void __user *buf = (void __user *)arg;
 994
 995         if (!arg)
 996                 return -EINVAL;
 997         switch (cmd) {
 998         case MFB_SET_PIXFMT:
 999                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1000                         return -EFAULT;
1001                 ad->pix_fmt = pix_fmt;
1002                 pr_debug("Set pixel format to 0x%08x\n", ad->pix_fmt);
1003                 break;
1004         case MFB_GET_PIXFMT:
1005                 pix_fmt = ad->pix_fmt;
1006                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1007                         return -EFAULT;
1008                 pr_debug("get pixel format 0x%08x\n", ad->pix_fmt);
1009                 break;
1010         case MFB_SET_AOID:
1011                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1012                         return -EFAULT;
1013                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1014                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1015                 pr_debug("set AOI display offset of index %d to (%d,%d)\n",
1016                                  mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1017                 fsl_diu_check_var(&info->var, info);
1018                 fsl_diu_set_aoi(info);
1019                 break;
1020         case MFB_GET_AOID:
1021                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1022                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1023                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1024                         return -EFAULT;
1025                 pr_debug("get AOI display offset of index %d (%d,%d)\n",
1026                                 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1027                 break;
1028         case MFB_GET_ALPHA:
1029                 global_alpha = mfbi->g_alpha;
1030                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1031                         return -EFAULT;
1032                 pr_debug("get global alpha of index %d\n", mfbi->index);
1033                 break;
1034         case MFB_SET_ALPHA:
1035                 /* set panel information */
1036                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1037                         return -EFAULT;
1038                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1039                                                         (global_alpha & 0xff);
1040                 mfbi->g_alpha = global_alpha;
1041                 pr_debug("set global alpha for index %d\n", mfbi->index);
1042                 break;
1043         case MFB_SET_CHROMA_KEY:
1044                 /* set panel winformation */
1045                 if (copy_from_user(&ck, buf, sizeof(ck)))
1046                         return -EFAULT;
1047
1048                 if (ck.enable &&
1049                    (ck.red_max < ck.red_min ||
1050                     ck.green_max < ck.green_min ||
1051                     ck.blue_max < ck.blue_min))
1052                         return -EINVAL;
1053
1054                 if (!ck.enable) {
1055                         ad->ckmax_r = 0;
1056                         ad->ckmax_g = 0;
1057                         ad->ckmax_b = 0;
1058                         ad->ckmin_r = 255;
1059                         ad->ckmin_g = 255;
1060                         ad->ckmin_b = 255;
1061                 } else {
1062                         ad->ckmax_r = ck.red_max;
1063                         ad->ckmax_g = ck.green_max;
1064                         ad->ckmax_b = ck.blue_max;
1065                         ad->ckmin_r = ck.red_min;
1066                         ad->ckmin_g = ck.green_min;
1067                         ad->ckmin_b = ck.blue_min;
1068                 }
1069                 pr_debug("set chroma key\n");
1070                 break;
1071         case FBIOGET_GWINFO:
1072                 if (mfbi->type == MFB_TYPE_OFF)
1073                         return -ENODEV;
1074                 /* get graphic window information */
1075                 if (copy_to_user(buf, ad, sizeof(*ad)))
1076                         return -EFAULT;
1077                 break;
1078         case FBIOGET_HWCINFO:
1079                 pr_debug("FBIOGET_HWCINFO:0x%08x\n", FBIOGET_HWCINFO);
1080                 break;
1081         case FBIOPUT_MODEINFO:
1082                 pr_debug("FBIOPUT_MODEINFO:0x%08x\n", FBIOPUT_MODEINFO);
1083                 break;
1084         case FBIOGET_DISPINFO:
1085                 pr_debug("FBIOGET_DISPINFO:0x%08x\n", FBIOGET_DISPINFO);
1086                 break;
1087
1088         default:
1089                 printk(KERN_ERR "Unknown ioctl command (0x%08X)\n", cmd);
1090                 return -ENOIOCTLCMD;
1091         }
1092
1093         return 0;
1094 }
1095
1096 /* turn on fb if count == 1
1097  */
1098 static int fsl_diu_open(struct fb_info *info, int user)
1099 {
1100         struct mfb_info *mfbi = info->par;
1101         int res = 0;
1102
1103         spin_lock(&diu_lock);
1104         mfbi->count++;
1105         if (mfbi->count == 1) {
1106                 pr_debug("open plane index %d\n", mfbi->index);
1107                 fsl_diu_check_var(&info->var, info);
1108                 res = fsl_diu_set_par(info);
1109                 if (res < 0)
1110                         mfbi->count--;
1111                 else {
1112                         res = fsl_diu_enable_panel(info);
1113                         if (res < 0)
1114                                 mfbi->count--;
1115                 }
1116         }
1117
1118         spin_unlock(&diu_lock);
1119         return res;
1120 }
1121
1122 /* turn off fb if count == 0
1123  */
1124 static int fsl_diu_release(struct fb_info *info, int user)
1125 {
1126         struct mfb_info *mfbi = info->par;
1127         int res = 0;
1128
1129         spin_lock(&diu_lock);
1130         mfbi->count--;
1131         if (mfbi->count == 0) {
1132                 pr_debug("release plane index %d\n", mfbi->index);
1133                 res = fsl_diu_disable_panel(info);
1134                 if (res < 0)
1135                         mfbi->count++;
1136         }
1137         spin_unlock(&diu_lock);
1138         return res;
1139 }
1140
1141 static struct fb_ops fsl_diu_ops = {
1142         .owner = THIS_MODULE,
1143         .fb_check_var = fsl_diu_check_var,
1144         .fb_set_par = fsl_diu_set_par,
1145         .fb_setcolreg = fsl_diu_setcolreg,
1146         .fb_blank = fsl_diu_blank,
1147         .fb_pan_display = fsl_diu_pan_display,
1148         .fb_fillrect = cfb_fillrect,
1149         .fb_copyarea = cfb_copyarea,
1150         .fb_imageblit = cfb_imageblit,
1151         .fb_ioctl = fsl_diu_ioctl,
1152         .fb_open = fsl_diu_open,
1153         .fb_release = fsl_diu_release,
1154 };
1155
1156 static int init_fbinfo(struct fb_info *info)
1157 {
1158         struct mfb_info *mfbi = info->par;
1159
1160         info->device = NULL;
1161         info->var.activate = FB_ACTIVATE_NOW;
1162         info->fbops = &fsl_diu_ops;
1163         info->flags = FBINFO_FLAG_DEFAULT;
1164         info->pseudo_palette = &mfbi->pseudo_palette;
1165
1166         /* Allocate colormap */
1167         fb_alloc_cmap(&info->cmap, 16, 0);
1168         return 0;
1169 }
1170
1171 static int __devinit install_fb(struct fb_info *info)
1172 {
1173         int rc;
1174         struct mfb_info *mfbi = info->par;
1175         const char *aoi_mode, *init_aoi_mode = "320x240";
1176
1177         if (init_fbinfo(info))
1178                 return -EINVAL;
1179
1180         if (mfbi->index == 0)   /* plane 0 */
1181                 aoi_mode = fb_mode;
1182         else
1183                 aoi_mode = init_aoi_mode;
1184         pr_debug("mode used = %s\n", aoi_mode);
1185         rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1186              ARRAY_SIZE(fsl_diu_mode_db), &fsl_diu_default_mode, default_bpp);
1187
1188         switch (rc) {
1189         case 1:
1190                 pr_debug("using mode specified in @mode\n");
1191                 break;
1192         case 2:
1193                 pr_debug("using mode specified in @mode "
1194                         "with ignored refresh rate\n");
1195                 break;
1196         case 3:
1197                 pr_debug("using mode default mode\n");
1198                 break;
1199         case 4:
1200                 pr_debug("using mode from list\n");
1201                 break;
1202         default:
1203                 pr_debug("rc = %d\n", rc);
1204                 pr_debug("failed to find mode\n");
1205                 return -EINVAL;
1206                 break;
1207         }
1208
1209         pr_debug("xres_virtual %d\n", info->var.xres_virtual);
1210         pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
1211
1212         pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
1213         pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
1214
1215         if (mfbi->type == MFB_TYPE_OFF)
1216                 mfbi->blank = FB_BLANK_NORMAL;
1217         else
1218                 mfbi->blank = FB_BLANK_UNBLANK;
1219
1220         if (fsl_diu_check_var(&info->var, info)) {
1221                 printk(KERN_ERR "fb_check_var failed");
1222                 fb_dealloc_cmap(&info->cmap);
1223                 return -EINVAL;
1224         }
1225
1226         if (register_framebuffer(info) < 0) {
1227                 printk(KERN_ERR "register_framebuffer failed");
1228                 unmap_video_memory(info);
1229                 fb_dealloc_cmap(&info->cmap);
1230                 return -EINVAL;
1231         }
1232
1233         mfbi->registered = 1;
1234         printk(KERN_INFO "fb%d: %s fb device registered successfully.\n",
1235                  info->node, info->fix.id);
1236
1237         return 0;
1238 }
1239
1240 static void uninstall_fb(struct fb_info *info)
1241 {
1242         struct mfb_info *mfbi = info->par;
1243
1244         if (!mfbi->registered)
1245                 return;
1246
1247         unregister_framebuffer(info);
1248         unmap_video_memory(info);
1249         if (&info->cmap)
1250                 fb_dealloc_cmap(&info->cmap);
1251
1252         mfbi->registered = 0;
1253 }
1254
1255 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1256 {
1257         struct diu *hw = dr.diu_reg;
1258         unsigned int status = in_be32(&hw->int_status);
1259
1260         if (status) {
1261                 /* This is the workaround for underrun */
1262                 if (status & INT_UNDRUN) {
1263                         out_be32(&hw->diu_mode, 0);
1264                         pr_debug("Err: DIU occurs underrun!\n");
1265                         udelay(1);
1266                         out_be32(&hw->diu_mode, 1);
1267                 }
1268 #if defined(CONFIG_NOT_COHERENT_CACHE)
1269                 else if (status & INT_VSYNC) {
1270                         unsigned int i;
1271                         for (i = 0; i < coherence_data_size;
1272                                 i += d_cache_line_size)
1273                                 __asm__ __volatile__ (
1274                                         "dcbz 0, %[input]"
1275                                 ::[input]"r"(&coherence_data[i]));
1276                 }
1277 #endif
1278                 return IRQ_HANDLED;
1279         }
1280         return IRQ_NONE;
1281 }
1282
1283 static int request_irq_local(int irq)
1284 {
1285         unsigned long status, ints;
1286         struct diu *hw;
1287         int ret;
1288
1289         hw = dr.diu_reg;
1290
1291         /* Read to clear the status */
1292         status = in_be32(&hw->int_status);
1293
1294         ret = request_irq(irq, fsl_diu_isr, 0, "diu", NULL);
1295         if (ret)
1296                 pr_info("Request diu IRQ failed.\n");
1297         else {
1298                 ints = INT_PARERR | INT_LS_BF_VS;
1299 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1300                 ints |= INT_VSYNC;
1301 #endif
1302                 if (dr.mode == MFB_MODE2 || dr.mode == MFB_MODE3)
1303                         ints |= INT_VSYNC_WB;
1304
1305                 /* Read to clear the status */
1306                 status = in_be32(&hw->int_status);
1307                 out_be32(&hw->int_mask, ints);
1308         }
1309         return ret;
1310 }
1311
1312 static void free_irq_local(int irq)
1313 {
1314         struct diu *hw = dr.diu_reg;
1315
1316         /* Disable all LCDC interrupt */
1317         out_be32(&hw->int_mask, 0x1f);
1318
1319         free_irq(irq, NULL);
1320 }
1321
1322 #ifdef CONFIG_PM
1323 /*
1324  * Power management hooks. Note that we won't be called from IRQ context,
1325  * unlike the blank functions above, so we may sleep.
1326  */
1327 static int fsl_diu_suspend(struct of_device *ofdev, pm_message_t state)
1328 {
1329         struct fsl_diu_data *machine_data;
1330
1331         machine_data = dev_get_drvdata(&ofdev->dev);
1332         disable_lcdc(machine_data->fsl_diu_info[0]);
1333
1334         return 0;
1335 }
1336
1337 static int fsl_diu_resume(struct of_device *ofdev)
1338 {
1339         struct fsl_diu_data *machine_data;
1340
1341         machine_data = dev_get_drvdata(&ofdev->dev);
1342         enable_lcdc(machine_data->fsl_diu_info[0]);
1343
1344         return 0;
1345 }
1346
1347 #else
1348 #define fsl_diu_suspend NULL
1349 #define fsl_diu_resume NULL
1350 #endif                          /* CONFIG_PM */
1351
1352 /* Align to 64-bit(8-byte), 32-byte, etc. */
1353 static int allocate_buf(struct device *dev, struct diu_addr *buf, u32 size,
1354                         u32 bytes_align)
1355 {
1356         u32 offset, ssize;
1357         u32 mask;
1358         dma_addr_t paddr = 0;
1359
1360         ssize = size + bytes_align;
1361         buf->vaddr = dma_alloc_coherent(dev, ssize, &paddr, GFP_DMA |
1362                                                              __GFP_ZERO);
1363         if (!buf->vaddr)
1364                 return -ENOMEM;
1365
1366         buf->paddr = (__u32) paddr;
1367
1368         mask = bytes_align - 1;
1369         offset = (u32)buf->paddr & mask;
1370         if (offset) {
1371                 buf->offset = bytes_align - offset;
1372                 buf->paddr = (u32)buf->paddr + offset;
1373         } else
1374                 buf->offset = 0;
1375         return 0;
1376 }
1377
1378 static void free_buf(struct device *dev, struct diu_addr *buf, u32 size,
1379                      u32 bytes_align)
1380 {
1381         dma_free_coherent(dev, size + bytes_align,
1382                                 buf->vaddr, (buf->paddr - buf->offset));
1383         return;
1384 }
1385
1386 static ssize_t store_monitor(struct device *device,
1387         struct device_attribute *attr, const char *buf, size_t count)
1388 {
1389         int old_monitor_port;
1390         unsigned long val;
1391         struct fsl_diu_data *machine_data =
1392                 container_of(attr, struct fsl_diu_data, dev_attr);
1393
1394         if (strict_strtoul(buf, 10, &val))
1395                 return 0;
1396
1397         old_monitor_port = machine_data->monitor_port;
1398         machine_data->monitor_port = diu_ops.set_sysfs_monitor_port(val);
1399
1400         if (old_monitor_port != machine_data->monitor_port) {
1401                 /* All AOIs need adjust pixel format
1402                  * fsl_diu_set_par only change the pixsel format here
1403                  * unlikely to fail. */
1404                 fsl_diu_set_par(machine_data->fsl_diu_info[0]);
1405                 fsl_diu_set_par(machine_data->fsl_diu_info[1]);
1406                 fsl_diu_set_par(machine_data->fsl_diu_info[2]);
1407                 fsl_diu_set_par(machine_data->fsl_diu_info[3]);
1408                 fsl_diu_set_par(machine_data->fsl_diu_info[4]);
1409         }
1410         return count;
1411 }
1412
1413 static ssize_t show_monitor(struct device *device,
1414         struct device_attribute *attr, char *buf)
1415 {
1416         struct fsl_diu_data *machine_data =
1417                 container_of(attr, struct fsl_diu_data, dev_attr);
1418         return diu_ops.show_monitor_port(machine_data->monitor_port, buf);
1419 }
1420
1421 static int __devinit fsl_diu_probe(struct of_device *ofdev,
1422         const struct of_device_id *match)
1423 {
1424         struct device_node *np = ofdev->node;
1425         struct mfb_info *mfbi;
1426         phys_addr_t dummy_ad_addr;
1427         int ret, i, error = 0;
1428         struct resource res;
1429         struct fsl_diu_data *machine_data;
1430
1431         machine_data = kzalloc(sizeof(struct fsl_diu_data), GFP_KERNEL);
1432         if (!machine_data)
1433                 return -ENOMEM;
1434
1435         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1436                 machine_data->fsl_diu_info[i] =
1437                         framebuffer_alloc(sizeof(struct mfb_info), &ofdev->dev);
1438                 if (!machine_data->fsl_diu_info[i]) {
1439                         dev_err(&ofdev->dev, "cannot allocate memory\n");
1440                         ret = -ENOMEM;
1441                         goto error2;
1442                 }
1443                 mfbi = machine_data->fsl_diu_info[i]->par;
1444                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1445                 mfbi->parent = machine_data;
1446         }
1447
1448         ret = of_address_to_resource(np, 0, &res);
1449         if (ret) {
1450                 dev_err(&ofdev->dev, "could not obtain DIU address\n");
1451                 goto error;
1452         }
1453         if (!res.start) {
1454                 dev_err(&ofdev->dev, "invalid DIU address\n");
1455                 goto error;
1456         }
1457         dev_dbg(&ofdev->dev, "%s, res.start: 0x%08x\n", __func__, res.start);
1458
1459         dr.diu_reg = ioremap(res.start, sizeof(struct diu));
1460         if (!dr.diu_reg) {
1461                 dev_err(&ofdev->dev, "Err: can't map DIU registers!\n");
1462                 ret = -EFAULT;
1463                 goto error2;
1464         }
1465
1466         out_be32(&dr.diu_reg->diu_mode, 0);             /* disable DIU anyway*/
1467
1468         /* Get the IRQ of the DIU */
1469         machine_data->irq = irq_of_parse_and_map(np, 0);
1470
1471         if (!machine_data->irq) {
1472                 dev_err(&ofdev->dev, "could not get DIU IRQ\n");
1473                 ret = -EINVAL;
1474                 goto error;
1475         }
1476         machine_data->monitor_port = monitor_port;
1477
1478         /* Area descriptor memory pool aligns to 64-bit boundary */
1479         if (allocate_buf(&ofdev->dev, &pool.ad,
1480                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1481                 return -ENOMEM;
1482
1483         /* Get memory for Gamma Table  - 32-byte aligned memory */
1484         if (allocate_buf(&ofdev->dev, &pool.gamma, 768, 32)) {
1485                 ret = -ENOMEM;
1486                 goto error;
1487         }
1488
1489         /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1490         if (allocate_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1491                          32)) {
1492                 ret = -ENOMEM;
1493                 goto error;
1494         }
1495
1496         i = ARRAY_SIZE(machine_data->fsl_diu_info);
1497         machine_data->dummy_ad = (struct diu_ad *)
1498                         ((u32)pool.ad.vaddr + pool.ad.offset) + i;
1499         machine_data->dummy_ad->paddr = pool.ad.paddr +
1500                         i * sizeof(struct diu_ad);
1501         machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1502         if (!machine_data->dummy_aoi_virt) {
1503                 ret = -ENOMEM;
1504                 goto error;
1505         }
1506         machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1507         machine_data->dummy_ad->pix_fmt = 0x88882317;
1508         machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1509         machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) |  2);
1510         machine_data->dummy_ad->offset_xyi = 0;
1511         machine_data->dummy_ad->offset_xyd = 0;
1512         machine_data->dummy_ad->next_ad = 0;
1513
1514         out_be32(&dr.diu_reg->desc[0], machine_data->dummy_ad->paddr);
1515         out_be32(&dr.diu_reg->desc[1], machine_data->dummy_ad->paddr);
1516         out_be32(&dr.diu_reg->desc[2], machine_data->dummy_ad->paddr);
1517
1518         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1519                 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1520                 mfbi = machine_data->fsl_diu_info[i]->par;
1521                 mfbi->ad = (struct diu_ad *)((u32)pool.ad.vaddr
1522                                         + pool.ad.offset) + i;
1523                 mfbi->ad->paddr = pool.ad.paddr + i * sizeof(struct diu_ad);
1524                 ret = install_fb(machine_data->fsl_diu_info[i]);
1525                 if (ret) {
1526                         dev_err(&ofdev->dev,
1527                                 "Failed to register framebuffer %d\n",
1528                                 i);
1529                         goto error;
1530                 }
1531         }
1532
1533         if (request_irq_local(machine_data->irq)) {
1534                 dev_err(machine_data->fsl_diu_info[0]->dev,
1535                         "could not request irq for diu.");
1536                 goto error;
1537         }
1538
1539         machine_data->dev_attr.attr.name = "monitor";
1540         machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1541         machine_data->dev_attr.show = show_monitor;
1542         machine_data->dev_attr.store = store_monitor;
1543         error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1544                                   &machine_data->dev_attr);
1545         if (error) {
1546                 dev_err(machine_data->fsl_diu_info[0]->dev,
1547                         "could not create sysfs %s file\n",
1548                         machine_data->dev_attr.attr.name);
1549         }
1550
1551         dev_set_drvdata(&ofdev->dev, machine_data);
1552         return 0;
1553
1554 error:
1555         for (i = ARRAY_SIZE(machine_data->fsl_diu_info);
1556                 i > 0; i--)
1557                 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1558         if (pool.ad.vaddr)
1559                 free_buf(&ofdev->dev, &pool.ad,
1560                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1561         if (pool.gamma.vaddr)
1562                 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1563         if (pool.cursor.vaddr)
1564                 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1565                          32);
1566         if (machine_data->dummy_aoi_virt)
1567                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1568         iounmap(dr.diu_reg);
1569
1570 error2:
1571         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1572                 if (machine_data->fsl_diu_info[i])
1573                         framebuffer_release(machine_data->fsl_diu_info[i]);
1574         kfree(machine_data);
1575
1576         return ret;
1577 }
1578
1579
1580 static int fsl_diu_remove(struct of_device *ofdev)
1581 {
1582         struct fsl_diu_data *machine_data;
1583         int i;
1584
1585         machine_data = dev_get_drvdata(&ofdev->dev);
1586         disable_lcdc(machine_data->fsl_diu_info[0]);
1587         free_irq_local(machine_data->irq);
1588         for (i = ARRAY_SIZE(machine_data->fsl_diu_info); i > 0; i--)
1589                 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1590         if (pool.ad.vaddr)
1591                 free_buf(&ofdev->dev, &pool.ad,
1592                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1593         if (pool.gamma.vaddr)
1594                 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1595         if (pool.cursor.vaddr)
1596                 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1597                          32);
1598         if (machine_data->dummy_aoi_virt)
1599                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1600         iounmap(dr.diu_reg);
1601         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1602                 if (machine_data->fsl_diu_info[i])
1603                         framebuffer_release(machine_data->fsl_diu_info[i]);
1604         kfree(machine_data);
1605
1606         return 0;
1607 }
1608
1609 #ifndef MODULE
1610 static int __init fsl_diu_setup(char *options)
1611 {
1612         char *opt;
1613         unsigned long val;
1614
1615         if (!options || !*options)
1616                 return 0;
1617
1618         while ((opt = strsep(&options, ",")) != NULL) {
1619                 if (!*opt)
1620                         continue;
1621                 if (!strncmp(opt, "monitor=", 8)) {
1622                         if (!strict_strtoul(opt + 8, 10, &val) && (val <= 2))
1623                                 monitor_port = val;
1624                 } else if (!strncmp(opt, "bpp=", 4)) {
1625                         if (!strict_strtoul(opt + 4, 10, &val))
1626                                 default_bpp = val;
1627                 } else
1628                         fb_mode = opt;
1629         }
1630
1631         return 0;
1632 }
1633 #endif
1634
1635 static struct of_device_id fsl_diu_match[] = {
1636         {
1637                 .compatible = "fsl,diu",
1638         },
1639         {}
1640 };
1641 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1642
1643 static struct of_platform_driver fsl_diu_driver = {
1644         .owner          = THIS_MODULE,
1645         .name           = "fsl_diu",
1646         .match_table    = fsl_diu_match,
1647         .probe          = fsl_diu_probe,
1648         .remove         = fsl_diu_remove,
1649         .suspend        = fsl_diu_suspend,
1650         .resume         = fsl_diu_resume,
1651 };
1652
1653 static int __init fsl_diu_init(void)
1654 {
1655 #ifdef CONFIG_NOT_COHERENT_CACHE
1656         struct device_node *np;
1657         const u32 *prop;
1658 #endif
1659         int ret;
1660 #ifndef MODULE
1661         char *option;
1662
1663         /*
1664          * For kernel boot options (in 'video=xxxfb:<options>' format)
1665          */
1666         if (fb_get_options("fslfb", &option))
1667                 return -ENODEV;
1668         fsl_diu_setup(option);
1669 #endif
1670         printk(KERN_INFO "Freescale DIU driver\n");
1671
1672 #ifdef CONFIG_NOT_COHERENT_CACHE
1673         np = of_find_node_by_type(NULL, "cpu");
1674         if (!np) {
1675                 printk(KERN_ERR "Err: can't find device node 'cpu'\n");
1676                 return -ENODEV;
1677         }
1678
1679         prop = of_get_property(np, "d-cache-size", NULL);
1680         if (prop == NULL) {
1681                 of_node_put(np);
1682                 return -ENODEV;
1683         }
1684
1685         /* Freescale PLRU requires 13/8 times the cache size to do a proper
1686            displacement flush
1687          */
1688         coherence_data_size = *prop * 13;
1689         coherence_data_size /= 8;
1690
1691         prop = of_get_property(np, "d-cache-line-size", NULL);
1692         if (prop == NULL) {
1693                 of_node_put(np);
1694                 return -ENODEV;
1695         }
1696         d_cache_line_size = *prop;
1697
1698         of_node_put(np);
1699         coherence_data = vmalloc(coherence_data_size);
1700         if (!coherence_data)
1701                 return -ENOMEM;
1702 #endif
1703         ret = of_register_platform_driver(&fsl_diu_driver);
1704         if (ret) {
1705                 printk(KERN_ERR
1706                         "fsl-diu: failed to register platform driver\n");
1707 #if defined(CONFIG_NOT_COHERENT_CACHE)
1708                 vfree(coherence_data);
1709 #endif
1710                 iounmap(dr.diu_reg);
1711         }
1712         return ret;
1713 }
1714
1715 static void __exit fsl_diu_exit(void)
1716 {
1717         of_unregister_platform_driver(&fsl_diu_driver);
1718 #if defined(CONFIG_NOT_COHERENT_CACHE)
1719         vfree(coherence_data);
1720 #endif
1721 }
1722
1723 module_init(fsl_diu_init);
1724 module_exit(fsl_diu_exit);
1725
1726 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1727 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1728 MODULE_LICENSE("GPL");
1729
1730 module_param_named(mode, fb_mode, charp, 0);
1731 MODULE_PARM_DESC(mode,
1732         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1733 module_param_named(bpp, default_bpp, ulong, 0);
1734 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
1735 module_param_named(monitor, monitor_port, int, 0);
1736 MODULE_PARM_DESC(monitor,
1737         "Specify the monitor port (0, 1 or 2) if supported by the platform");
1738