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 <sysdev/fsl_soc.h>
  35 #include <linux/fsl-diu-fb.h>
  36 #include "edid.h"
  37
  38 /*
  39  * List of supported video modes
  40  *
  41  * The first entry is the default video mode
  42  */
  43 static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
  44         {
  45                 .name           = "1024x768-60",
  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                 .name           = "1024x768-70",
  61                 .refresh        = 70,
  62                 .xres           = 1024,
  63                 .yres           = 768,
  64                 .pixclock       = 16886,
  65                 .left_margin    = 3,
  66                 .right_margin   = 3,
  67                 .upper_margin   = 2,
  68                 .lower_margin   = 2,
  69                 .hsync_len      = 40,
  70                 .vsync_len      = 18,
  71                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  72                 .vmode          = FB_VMODE_NONINTERLACED
  73         },
  74         {
  75                 .name           = "1024x768-75",
  76                 .refresh        = 75,
  77                 .xres           = 1024,
  78                 .yres           = 768,
  79                 .pixclock       = 15009,
  80                 .left_margin    = 3,
  81                 .right_margin   = 3,
  82                 .upper_margin   = 2,
  83                 .lower_margin   = 2,
  84                 .hsync_len      = 80,
  85                 .vsync_len      = 32,
  86                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  87                 .vmode          = FB_VMODE_NONINTERLACED
  88         },
  89         {
  90                 .name           = "1280x1024-60",
  91                 .refresh        = 60,
  92                 .xres           = 1280,
  93                 .yres           = 1024,
  94                 .pixclock       = 9375,
  95                 .left_margin    = 38,
  96                 .right_margin   = 128,
  97                 .upper_margin   = 2,
  98                 .lower_margin   = 7,
  99                 .hsync_len      = 216,
 100                 .vsync_len      = 37,
 101                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 102                 .vmode          = FB_VMODE_NONINTERLACED
 103         },
 104         {
 105                 .name           = "1280x1024-70",
 106                 .refresh        = 70,
 107                 .xres           = 1280,
 108                 .yres           = 1024,
 109                 .pixclock       = 9380,
 110                 .left_margin    = 6,
 111                 .right_margin   = 6,
 112                 .upper_margin   = 4,
 113                 .lower_margin   = 4,
 114                 .hsync_len      = 60,
 115                 .vsync_len      = 94,
 116                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 117                 .vmode          = FB_VMODE_NONINTERLACED
 118         },
 119         {
 120                 .name           = "1280x1024-75",
 121                 .refresh        = 75,
 122                 .xres           = 1280,
 123                 .yres           = 1024,
 124                 .pixclock       = 9380,
 125                 .left_margin    = 6,
 126                 .right_margin   = 6,
 127                 .upper_margin   = 4,
 128                 .lower_margin   = 4,
 129                 .hsync_len      = 60,
 130                 .vsync_len      = 15,
 131                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 132                 .vmode          = FB_VMODE_NONINTERLACED
 133         },
 134         {
 135                 .name           = "320x240",            /* for AOI only */
 136                 .refresh        = 60,
 137                 .xres           = 320,
 138                 .yres           = 240,
 139                 .pixclock       = 15385,
 140                 .left_margin    = 0,
 141                 .right_margin   = 0,
 142                 .upper_margin   = 0,
 143                 .lower_margin   = 0,
 144                 .hsync_len      = 0,
 145                 .vsync_len      = 0,
 146                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 147                 .vmode          = FB_VMODE_NONINTERLACED
 148         },
 149         {
 150                 .name           = "1280x480-60",
 151                 .refresh        = 60,
 152                 .xres           = 1280,
 153                 .yres           = 480,
 154                 .pixclock       = 18939,
 155                 .left_margin    = 353,
 156                 .right_margin   = 47,
 157                 .upper_margin   = 39,
 158                 .lower_margin   = 4,
 159                 .hsync_len      = 8,
 160                 .vsync_len      = 2,
 161                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 162                 .vmode          = FB_VMODE_NONINTERLACED
 163         },
 164 };
 165
 166 static char *fb_mode = "1024x768-32@60";
 167 static unsigned long default_bpp = 32;
 168 static enum fsl_diu_monitor_port monitor_port;
 169 static char *monitor_string;
 170
 171 #if defined(CONFIG_NOT_COHERENT_CACHE)
 172 static u8 *coherence_data;
 173 static size_t coherence_data_size;
 174 static unsigned int d_cache_line_size;
 175 #endif
 176
 177 static DEFINE_SPINLOCK(diu_lock);
 178
 179 struct fsl_diu_data {
 180         struct fb_info *fsl_diu_info[FSL_AOI_NUM - 1];
 181                                 /*FSL_AOI_NUM has one dummy AOI */
 182         struct device_attribute dev_attr;
 183         struct diu_ad *dummy_ad;
 184         void *dummy_aoi_virt;
 185         unsigned int irq;
 186         int fb_enabled;
 187         enum fsl_diu_monitor_port monitor_port;
 188 };
 189
 190 struct mfb_info {
 191         int index;
 192         int type;
 193         char *id;
 194         int registered;
 195         int blank;
 196         unsigned long pseudo_palette[16];
 197         struct diu_ad *ad;
 198         int cursor_reset;
 199         unsigned char g_alpha;
 200         unsigned int count;
 201         int x_aoi_d;            /* aoi display x offset to physical screen */
 202         int y_aoi_d;            /* aoi display y offset to physical screen */
 203         struct fsl_diu_data *parent;
 204         u8 *edid_data;
 205 };
 206
 207
 208 static struct mfb_info mfb_template[] = {
 209         {               /* AOI 0 for plane 0 */
 210                 .index = 0,
 211                 .type = MFB_TYPE_OUTPUT,
 212                 .id = "Panel0",
 213                 .registered = 0,
 214                 .count = 0,
 215                 .x_aoi_d = 0,
 216                 .y_aoi_d = 0,
 217         },
 218         {               /* AOI 0 for plane 1 */
 219                 .index = 1,
 220                 .type = MFB_TYPE_OUTPUT,
 221                 .id = "Panel1 AOI0",
 222                 .registered = 0,
 223                 .g_alpha = 0xff,
 224                 .count = 0,
 225                 .x_aoi_d = 0,
 226                 .y_aoi_d = 0,
 227         },
 228         {               /* AOI 1 for plane 1 */
 229                 .index = 2,
 230                 .type = MFB_TYPE_OUTPUT,
 231                 .id = "Panel1 AOI1",
 232                 .registered = 0,
 233                 .g_alpha = 0xff,
 234                 .count = 0,
 235                 .x_aoi_d = 0,
 236                 .y_aoi_d = 480,
 237         },
 238         {               /* AOI 0 for plane 2 */
 239                 .index = 3,
 240                 .type = MFB_TYPE_OUTPUT,
 241                 .id = "Panel2 AOI0",
 242                 .registered = 0,
 243                 .g_alpha = 0xff,
 244                 .count = 0,
 245                 .x_aoi_d = 640,
 246                 .y_aoi_d = 0,
 247         },
 248         {               /* AOI 1 for plane 2 */
 249                 .index = 4,
 250                 .type = MFB_TYPE_OUTPUT,
 251                 .id = "Panel2 AOI1",
 252                 .registered = 0,
 253                 .g_alpha = 0xff,
 254                 .count = 0,
 255                 .x_aoi_d = 640,
 256                 .y_aoi_d = 480,
 257         },
 258 };
 259
 260 static struct diu_hw dr = {
 261         .mode = MFB_MODE1,
 262         .reg_lock = __SPIN_LOCK_UNLOCKED(diu_hw.reg_lock),
 263 };
 264
 265 static struct diu_pool pool;
 266
 267 /**
 268  * fsl_diu_name_to_port - convert a port name to a monitor port enum
 269  *
 270  * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
 271  * the enum fsl_diu_monitor_port that corresponds to that string.
 272  *
 273  * For compatibility with older versions, a number ("0", "1", or "2") is also
 274  * supported.
 275  *
 276  * If the string is unknown, DVI is assumed.
 277  *
 278  * If the particular port is not supported by the platform, another port
 279  * (platform-specific) is chosen instead.
 280  */
 281 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
 282 {
 283         enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
 284         unsigned long val;
 285
 286         if (s) {
 287                 if (!strict_strtoul(s, 10, &val) && (val <= 2))
 288                         port = (enum fsl_diu_monitor_port) val;
 289                 else if (strncmp(s, "lvds", 4) == 0)
 290                         port = FSL_DIU_PORT_LVDS;
 291                 else if (strncmp(s, "dlvds", 5) == 0)
 292                         port = FSL_DIU_PORT_DLVDS;
 293         }
 294
 295         return diu_ops.valid_monitor_port(port);
 296 }
 297
 298 /**
 299  * fsl_diu_alloc - allocate memory for the DIU
 300  * @size: number of bytes to allocate
 301  * @param: returned physical address of memory
 302  *
 303  * This function allocates a physically-contiguous block of memory.
 304  */
 305 static void *fsl_diu_alloc(size_t size, phys_addr_t *phys)
 306 {
 307         void *virt;
 308
 309         virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
 310         if (virt)
 311                 *phys = virt_to_phys(virt);
 312
 313         return virt;
 314 }
 315
 316 /**
 317  * fsl_diu_free - release DIU memory
 318  * @virt: pointer returned by fsl_diu_alloc()
 319  * @size: number of bytes allocated by fsl_diu_alloc()
 320  *
 321  * This function releases memory allocated by fsl_diu_alloc().
 322  */
 323 static void fsl_diu_free(void *virt, size_t size)
 324 {
 325         if (virt && size)
 326                 free_pages_exact(virt, size);
 327 }
 328
 329 /*
 330  * Workaround for failed writing desc register of planes.
 331  * Needed with MPC5121 DIU rev 2.0 silicon.
 332  */
 333 void wr_reg_wa(u32 *reg, u32 val)
 334 {
 335         do {
 336                 out_be32(reg, val);
 337         } while (in_be32(reg) != val);
 338 }
 339
 340 static int fsl_diu_enable_panel(struct fb_info *info)
 341 {
 342         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 343         struct diu *hw = dr.diu_reg;
 344         struct diu_ad *ad = mfbi->ad;
 345         struct fsl_diu_data *machine_data = mfbi->parent;
 346         int res = 0;
 347
 348         if (mfbi->type != MFB_TYPE_OFF) {
 349                 switch (mfbi->index) {
 350                 case 0:                         /* plane 0 */
 351                         if (hw->desc[0] != ad->paddr)
 352                                 wr_reg_wa(&hw->desc[0], ad->paddr);
 353                         break;
 354                 case 1:                         /* plane 1 AOI 0 */
 355                         cmfbi = machine_data->fsl_diu_info[2]->par;
 356                         if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
 357                                 if (cmfbi->count > 0)   /* AOI1 open */
 358                                         ad->next_ad =
 359                                                 cpu_to_le32(cmfbi->ad->paddr);
 360                                 else
 361                                         ad->next_ad = 0;
 362                                 wr_reg_wa(&hw->desc[1], ad->paddr);
 363                         }
 364                         break;
 365                 case 3:                         /* plane 2 AOI 0 */
 366                         cmfbi = machine_data->fsl_diu_info[4]->par;
 367                         if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
 368                                 if (cmfbi->count > 0)   /* AOI1 open */
 369                                         ad->next_ad =
 370                                                 cpu_to_le32(cmfbi->ad->paddr);
 371                                 else
 372                                         ad->next_ad = 0;
 373                                 wr_reg_wa(&hw->desc[2], ad->paddr);
 374                         }
 375                         break;
 376                 case 2:                         /* plane 1 AOI 1 */
 377                         pmfbi = machine_data->fsl_diu_info[1]->par;
 378                         ad->next_ad = 0;
 379                         if (hw->desc[1] == machine_data->dummy_ad->paddr)
 380                                 wr_reg_wa(&hw->desc[1], ad->paddr);
 381                         else                                    /* AOI0 open */
 382                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 383                         break;
 384                 case 4:                         /* plane 2 AOI 1 */
 385                         pmfbi = machine_data->fsl_diu_info[3]->par;
 386                         ad->next_ad = 0;
 387                         if (hw->desc[2] == machine_data->dummy_ad->paddr)
 388                                 wr_reg_wa(&hw->desc[2], ad->paddr);
 389                         else                            /* AOI0 was open */
 390                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 391                         break;
 392                 default:
 393                         res = -EINVAL;
 394                         break;
 395                 }
 396         } else
 397                 res = -EINVAL;
 398         return res;
 399 }
 400
 401 static int fsl_diu_disable_panel(struct fb_info *info)
 402 {
 403         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 404         struct diu *hw = dr.diu_reg;
 405         struct diu_ad *ad = mfbi->ad;
 406         struct fsl_diu_data *machine_data = mfbi->parent;
 407         int res = 0;
 408
 409         switch (mfbi->index) {
 410         case 0:                                 /* plane 0 */
 411                 if (hw->desc[0] != machine_data->dummy_ad->paddr)
 412                         wr_reg_wa(&hw->desc[0], machine_data->dummy_ad->paddr);
 413                 break;
 414         case 1:                                 /* plane 1 AOI 0 */
 415                 cmfbi = machine_data->fsl_diu_info[2]->par;
 416                 if (cmfbi->count > 0)   /* AOI1 is open */
 417                         wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
 418                                         /* move AOI1 to the first */
 419                 else                    /* AOI1 was closed */
 420                         wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
 421                                         /* close AOI 0 */
 422                 break;
 423         case 3:                                 /* plane 2 AOI 0 */
 424                 cmfbi = machine_data->fsl_diu_info[4]->par;
 425                 if (cmfbi->count > 0)   /* AOI1 is open */
 426                         wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
 427                                         /* move AOI1 to the first */
 428                 else                    /* AOI1 was closed */
 429                         wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
 430                                         /* close AOI 0 */
 431                 break;
 432         case 2:                                 /* plane 1 AOI 1 */
 433                 pmfbi = machine_data->fsl_diu_info[1]->par;
 434                 if (hw->desc[1] != ad->paddr) {
 435                                 /* AOI1 is not the first in the chain */
 436                         if (pmfbi->count > 0)
 437                                         /* AOI0 is open, must be the first */
 438                                 pmfbi->ad->next_ad = 0;
 439                 } else                  /* AOI1 is the first in the chain */
 440                         wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
 441                                         /* close AOI 1 */
 442                 break;
 443         case 4:                                 /* plane 2 AOI 1 */
 444                 pmfbi = machine_data->fsl_diu_info[3]->par;
 445                 if (hw->desc[2] != ad->paddr) {
 446                                 /* AOI1 is not the first in the chain */
 447                         if (pmfbi->count > 0)
 448                                 /* AOI0 is open, must be the first */
 449                                 pmfbi->ad->next_ad = 0;
 450                 } else          /* AOI1 is the first in the chain */
 451                         wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
 452                                 /* close AOI 1 */
 453                 break;
 454         default:
 455                 res = -EINVAL;
 456                 break;
 457         }
 458
 459         return res;
 460 }
 461
 462 static void enable_lcdc(struct fb_info *info)
 463 {
 464         struct diu *hw = dr.diu_reg;
 465         struct mfb_info *mfbi = info->par;
 466         struct fsl_diu_data *machine_data = mfbi->parent;
 467
 468         if (!machine_data->fb_enabled) {
 469                 out_be32(&hw->diu_mode, dr.mode);
 470                 machine_data->fb_enabled++;
 471         }
 472 }
 473
 474 static void disable_lcdc(struct fb_info *info)
 475 {
 476         struct diu *hw = dr.diu_reg;
 477         struct mfb_info *mfbi = info->par;
 478         struct fsl_diu_data *machine_data = mfbi->parent;
 479
 480         if (machine_data->fb_enabled) {
 481                 out_be32(&hw->diu_mode, 0);
 482                 machine_data->fb_enabled = 0;
 483         }
 484 }
 485
 486 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 487                                 struct fb_info *info)
 488 {
 489         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
 490         struct fsl_diu_data *machine_data = mfbi->parent;
 491         int available_height, upper_aoi_bottom, index = mfbi->index;
 492         int lower_aoi_is_open, upper_aoi_is_open;
 493         __u32 base_plane_width, base_plane_height, upper_aoi_height;
 494
 495         base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
 496         base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
 497
 498         if (mfbi->x_aoi_d < 0)
 499                 mfbi->x_aoi_d = 0;
 500         if (mfbi->y_aoi_d < 0)
 501                 mfbi->y_aoi_d = 0;
 502         switch (index) {
 503         case 0:
 504                 if (mfbi->x_aoi_d != 0)
 505                         mfbi->x_aoi_d = 0;
 506                 if (mfbi->y_aoi_d != 0)
 507                         mfbi->y_aoi_d = 0;
 508                 break;
 509         case 1:                 /* AOI 0 */
 510         case 3:
 511                 lower_aoi_mfbi = machine_data->fsl_diu_info[index+1]->par;
 512                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
 513                 if (var->xres > base_plane_width)
 514                         var->xres = base_plane_width;
 515                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 516                         mfbi->x_aoi_d = base_plane_width - var->xres;
 517
 518                 if (lower_aoi_is_open)
 519                         available_height = lower_aoi_mfbi->y_aoi_d;
 520                 else
 521                         available_height = base_plane_height;
 522                 if (var->yres > available_height)
 523                         var->yres = available_height;
 524                 if ((mfbi->y_aoi_d + var->yres) > available_height)
 525                         mfbi->y_aoi_d = available_height - var->yres;
 526                 break;
 527         case 2:                 /* AOI 1 */
 528         case 4:
 529                 upper_aoi_mfbi = machine_data->fsl_diu_info[index-1]->par;
 530                 upper_aoi_height =
 531                                 machine_data->fsl_diu_info[index-1]->var.yres;
 532                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
 533                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
 534                 if (var->xres > base_plane_width)
 535                         var->xres = base_plane_width;
 536                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 537                         mfbi->x_aoi_d = base_plane_width - var->xres;
 538                 if (mfbi->y_aoi_d < 0)
 539                         mfbi->y_aoi_d = 0;
 540                 if (upper_aoi_is_open) {
 541                         if (mfbi->y_aoi_d < upper_aoi_bottom)
 542                                 mfbi->y_aoi_d = upper_aoi_bottom;
 543                         available_height = base_plane_height
 544                                                 - upper_aoi_bottom;
 545                 } else
 546                         available_height = base_plane_height;
 547                 if (var->yres > available_height)
 548                         var->yres = available_height;
 549                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
 550                         mfbi->y_aoi_d = base_plane_height - var->yres;
 551                 break;
 552         }
 553 }
 554 /*
 555  * Checks to see if the hardware supports the state requested by var passed
 556  * in. This function does not alter the hardware state! If the var passed in
 557  * is slightly off by what the hardware can support then we alter the var
 558  * PASSED in to what we can do. If the hardware doesn't support mode change
 559  * a -EINVAL will be returned by the upper layers.
 560  */
 561 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 562                                 struct fb_info *info)
 563 {
 564         if (var->xres_virtual < var->xres)
 565                 var->xres_virtual = var->xres;
 566         if (var->yres_virtual < var->yres)
 567                 var->yres_virtual = var->yres;
 568
 569         if (var->xoffset < 0)
 570                 var->xoffset = 0;
 571
 572         if (var->yoffset < 0)
 573                 var->yoffset = 0;
 574
 575         if (var->xoffset + info->var.xres > info->var.xres_virtual)
 576                 var->xoffset = info->var.xres_virtual - info->var.xres;
 577
 578         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 579                 var->yoffset = info->var.yres_virtual - info->var.yres;
 580
 581         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 582             (var->bits_per_pixel != 16))
 583                 var->bits_per_pixel = default_bpp;
 584
 585         switch (var->bits_per_pixel) {
 586         case 16:
 587                 var->red.length = 5;
 588                 var->red.offset = 11;
 589                 var->red.msb_right = 0;
 590
 591                 var->green.length = 6;
 592                 var->green.offset = 5;
 593                 var->green.msb_right = 0;
 594
 595                 var->blue.length = 5;
 596                 var->blue.offset = 0;
 597                 var->blue.msb_right = 0;
 598
 599                 var->transp.length = 0;
 600                 var->transp.offset = 0;
 601                 var->transp.msb_right = 0;
 602                 break;
 603         case 24:
 604                 var->red.length = 8;
 605                 var->red.offset = 0;
 606                 var->red.msb_right = 0;
 607
 608                 var->green.length = 8;
 609                 var->green.offset = 8;
 610                 var->green.msb_right = 0;
 611
 612                 var->blue.length = 8;
 613                 var->blue.offset = 16;
 614                 var->blue.msb_right = 0;
 615
 616                 var->transp.length = 0;
 617                 var->transp.offset = 0;
 618                 var->transp.msb_right = 0;
 619                 break;
 620         case 32:
 621                 var->red.length = 8;
 622                 var->red.offset = 16;
 623                 var->red.msb_right = 0;
 624
 625                 var->green.length = 8;
 626                 var->green.offset = 8;
 627                 var->green.msb_right = 0;
 628
 629                 var->blue.length = 8;
 630                 var->blue.offset = 0;
 631                 var->blue.msb_right = 0;
 632
 633                 var->transp.length = 8;
 634                 var->transp.offset = 24;
 635                 var->transp.msb_right = 0;
 636
 637                 break;
 638         }
 639
 640         var->height = -1;
 641         var->width = -1;
 642         var->grayscale = 0;
 643
 644         /* Copy nonstd field to/from sync for fbset usage */
 645         var->sync |= var->nonstd;
 646         var->nonstd |= var->sync;
 647
 648         adjust_aoi_size_position(var, info);
 649         return 0;
 650 }
 651
 652 static void set_fix(struct fb_info *info)
 653 {
 654         struct fb_fix_screeninfo *fix = &info->fix;
 655         struct fb_var_screeninfo *var = &info->var;
 656         struct mfb_info *mfbi = info->par;
 657
 658         strncpy(fix->id, mfbi->id, sizeof(fix->id));
 659         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 660         fix->type = FB_TYPE_PACKED_PIXELS;
 661         fix->accel = FB_ACCEL_NONE;
 662         fix->visual = FB_VISUAL_TRUECOLOR;
 663         fix->xpanstep = 1;
 664         fix->ypanstep = 1;
 665 }
 666
 667 static void update_lcdc(struct fb_info *info)
 668 {
 669         struct fb_var_screeninfo *var = &info->var;
 670         struct mfb_info *mfbi = info->par;
 671         struct fsl_diu_data *machine_data = mfbi->parent;
 672         struct diu *hw;
 673         int i, j;
 674         char __iomem *cursor_base, *gamma_table_base;
 675
 676         u32 temp;
 677
 678         hw = dr.diu_reg;
 679
 680         if (mfbi->type == MFB_TYPE_OFF) {
 681                 fsl_diu_disable_panel(info);
 682                 return;
 683         }
 684
 685         diu_ops.set_monitor_port(machine_data->monitor_port);
 686         gamma_table_base = pool.gamma.vaddr;
 687         cursor_base = pool.cursor.vaddr;
 688         /* Prep for DIU init  - gamma table, cursor table */
 689
 690         for (i = 0; i <= 2; i++)
 691                 for (j = 0; j <= 255; j++)
 692                         *gamma_table_base++ = j;
 693
 694         diu_ops.set_gamma_table(machine_data->monitor_port, pool.gamma.vaddr);
 695
 696         disable_lcdc(info);
 697
 698         /* Program DIU registers */
 699
 700         out_be32(&hw->gamma, pool.gamma.paddr);
 701         out_be32(&hw->cursor, pool.cursor.paddr);
 702
 703         out_be32(&hw->bgnd, 0x007F7F7F);        /* BGND */
 704         out_be32(&hw->bgnd_wb, 0);              /* BGND_WB */
 705         out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
 706                                                 /* DISP SIZE */
 707         out_be32(&hw->wb_size, 0); /* WB SIZE */
 708         out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
 709
 710         /* Horizontal and vertical configuration register */
 711         temp = var->left_margin << 22 | /* BP_H */
 712                var->hsync_len << 11 |   /* PW_H */
 713                var->right_margin;       /* FP_H */
 714
 715         out_be32(&hw->hsyn_para, temp);
 716
 717         temp = var->upper_margin << 22 | /* BP_V */
 718                var->vsync_len << 11 |    /* PW_V  */
 719                var->lower_margin;        /* FP_V  */
 720
 721         out_be32(&hw->vsyn_para, temp);
 722
 723         diu_ops.set_pixel_clock(var->pixclock);
 724
 725         out_be32(&hw->syn_pol, 0);      /* SYNC SIGNALS POLARITY */
 726         out_be32(&hw->thresholds, 0x00037800); /* The Thresholds */
 727         out_be32(&hw->int_status, 0);   /* INTERRUPT STATUS */
 728         out_be32(&hw->plut, 0x01F5F666);
 729
 730         /* Enable the DIU */
 731         enable_lcdc(info);
 732 }
 733
 734 static int map_video_memory(struct fb_info *info)
 735 {
 736         phys_addr_t phys;
 737         u32 smem_len = info->fix.line_length * info->var.yres_virtual;
 738
 739         info->screen_base = fsl_diu_alloc(smem_len, &phys);
 740         if (info->screen_base == NULL) {
 741                 dev_err(info->dev, "unable to allocate fb memory\n");
 742                 return -ENOMEM;
 743         }
 744         mutex_lock(&info->mm_lock);
 745         info->fix.smem_start = (unsigned long) phys;
 746         info->fix.smem_len = smem_len;
 747         mutex_unlock(&info->mm_lock);
 748         info->screen_size = info->fix.smem_len;
 749
 750         return 0;
 751 }
 752
 753 static void unmap_video_memory(struct fb_info *info)
 754 {
 755         fsl_diu_free(info->screen_base, info->fix.smem_len);
 756         mutex_lock(&info->mm_lock);
 757         info->screen_base = NULL;
 758         info->fix.smem_start = 0;
 759         info->fix.smem_len = 0;
 760         mutex_unlock(&info->mm_lock);
 761 }
 762
 763 /*
 764  * Using the fb_var_screeninfo in fb_info we set the aoi of this
 765  * particular framebuffer. It is a light version of fsl_diu_set_par.
 766  */
 767 static int fsl_diu_set_aoi(struct fb_info *info)
 768 {
 769         struct fb_var_screeninfo *var = &info->var;
 770         struct mfb_info *mfbi = info->par;
 771         struct diu_ad *ad = mfbi->ad;
 772
 773         /* AOI should not be greater than display size */
 774         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 775         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 776         return 0;
 777 }
 778
 779 /*
 780  * Using the fb_var_screeninfo in fb_info we set the resolution of this
 781  * particular framebuffer. This function alters the fb_fix_screeninfo stored
 782  * in fb_info. It does not alter var in fb_info since we are using that
 783  * data. This means we depend on the data in var inside fb_info to be
 784  * supported by the hardware. fsl_diu_check_var is always called before
 785  * fsl_diu_set_par to ensure this.
 786  */
 787 static int fsl_diu_set_par(struct fb_info *info)
 788 {
 789         unsigned long len;
 790         struct fb_var_screeninfo *var = &info->var;
 791         struct mfb_info *mfbi = info->par;
 792         struct fsl_diu_data *machine_data = mfbi->parent;
 793         struct diu_ad *ad = mfbi->ad;
 794         struct diu *hw;
 795
 796         hw = dr.diu_reg;
 797
 798         set_fix(info);
 799         mfbi->cursor_reset = 1;
 800
 801         len = info->var.yres_virtual * info->fix.line_length;
 802         /* Alloc & dealloc each time resolution/bpp change */
 803         if (len != info->fix.smem_len) {
 804                 if (info->fix.smem_start)
 805                         unmap_video_memory(info);
 806
 807                 /* Memory allocation for framebuffer */
 808                 if (map_video_memory(info)) {
 809                         dev_err(info->dev, "unable to allocate fb memory 1\n");
 810                         return -ENOMEM;
 811                 }
 812         }
 813
 814         ad->pix_fmt = diu_ops.get_pixel_format(machine_data->monitor_port,
 815                                                var->bits_per_pixel);
 816         ad->addr    = cpu_to_le32(info->fix.smem_start);
 817         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
 818                                 var->xres_virtual) | mfbi->g_alpha;
 819         /* AOI should not be greater than display size */
 820         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
 821         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 822         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 823
 824         /* Disable chroma keying function */
 825         ad->ckmax_r = 0;
 826         ad->ckmax_g = 0;
 827         ad->ckmax_b = 0;
 828
 829         ad->ckmin_r = 255;
 830         ad->ckmin_g = 255;
 831         ad->ckmin_b = 255;
 832
 833         if (mfbi->index == 0)
 834                 update_lcdc(info);
 835         return 0;
 836 }
 837
 838 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
 839 {
 840         return ((val << width) + 0x7FFF - val) >> 16;
 841 }
 842
 843 /*
 844  * Set a single color register. The values supplied have a 16 bit magnitude
 845  * which needs to be scaled in this function for the hardware. Things to take
 846  * into consideration are how many color registers, if any, are supported with
 847  * the current color visual. With truecolor mode no color palettes are
 848  * supported. Here a pseudo palette is created which we store the value in
 849  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
 850  * color palette.
 851  */
 852 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
 853                              unsigned int green, unsigned int blue,
 854                              unsigned int transp, struct fb_info *info)
 855 {
 856         int ret = 1;
 857
 858         /*
 859          * If greyscale is true, then we convert the RGB value
 860          * to greyscale no matter what visual we are using.
 861          */
 862         if (info->var.grayscale)
 863                 red = green = blue = (19595 * red + 38470 * green +
 864                                       7471 * blue) >> 16;
 865         switch (info->fix.visual) {
 866         case FB_VISUAL_TRUECOLOR:
 867                 /*
 868                  * 16-bit True Colour.  We encode the RGB value
 869                  * according to the RGB bitfield information.
 870                  */
 871                 if (regno < 16) {
 872                         u32 *pal = info->pseudo_palette;
 873                         u32 v;
 874
 875                         red = CNVT_TOHW(red, info->var.red.length);
 876                         green = CNVT_TOHW(green, info->var.green.length);
 877                         blue = CNVT_TOHW(blue, info->var.blue.length);
 878                         transp = CNVT_TOHW(transp, info->var.transp.length);
 879
 880                         v = (red << info->var.red.offset) |
 881                             (green << info->var.green.offset) |
 882                             (blue << info->var.blue.offset) |
 883                             (transp << info->var.transp.offset);
 884
 885                         pal[regno] = v;
 886                         ret = 0;
 887                 }
 888                 break;
 889         }
 890
 891         return ret;
 892 }
 893
 894 /*
 895  * Pan (or wrap, depending on the `vmode' field) the display using the
 896  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
 897  * don't fit, return -EINVAL.
 898  */
 899 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
 900                              struct fb_info *info)
 901 {
 902         if ((info->var.xoffset == var->xoffset) &&
 903             (info->var.yoffset == var->yoffset))
 904                 return 0;       /* No change, do nothing */
 905
 906         if (var->xoffset < 0 || var->yoffset < 0
 907             || var->xoffset + info->var.xres > info->var.xres_virtual
 908             || var->yoffset + info->var.yres > info->var.yres_virtual)
 909                 return -EINVAL;
 910
 911         info->var.xoffset = var->xoffset;
 912         info->var.yoffset = var->yoffset;
 913
 914         if (var->vmode & FB_VMODE_YWRAP)
 915                 info->var.vmode |= FB_VMODE_YWRAP;
 916         else
 917                 info->var.vmode &= ~FB_VMODE_YWRAP;
 918
 919         fsl_diu_set_aoi(info);
 920
 921         return 0;
 922 }
 923
 924 /*
 925  * Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
 926  * succeeded, != 0 if un-/blanking failed.
 927  * blank_mode == 2: suspend vsync
 928  * blank_mode == 3: suspend hsync
 929  * blank_mode == 4: powerdown
 930  */
 931 static int fsl_diu_blank(int blank_mode, struct fb_info *info)
 932 {
 933         struct mfb_info *mfbi = info->par;
 934
 935         mfbi->blank = blank_mode;
 936
 937         switch (blank_mode) {
 938         case FB_BLANK_VSYNC_SUSPEND:
 939         case FB_BLANK_HSYNC_SUSPEND:
 940         /* FIXME: fixes to enable_panel and enable lcdc needed */
 941         case FB_BLANK_NORMAL:
 942         /*      fsl_diu_disable_panel(info);*/
 943                 break;
 944         case FB_BLANK_POWERDOWN:
 945         /*      disable_lcdc(info);     */
 946                 break;
 947         case FB_BLANK_UNBLANK:
 948         /*      fsl_diu_enable_panel(info);*/
 949                 break;
 950         }
 951
 952         return 0;
 953 }
 954
 955 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 956                        unsigned long arg)
 957 {
 958         struct mfb_info *mfbi = info->par;
 959         struct diu_ad *ad = mfbi->ad;
 960         struct mfb_chroma_key ck;
 961         unsigned char global_alpha;
 962         struct aoi_display_offset aoi_d;
 963         __u32 pix_fmt;
 964         void __user *buf = (void __user *)arg;
 965
 966         if (!arg)
 967                 return -EINVAL;
 968         switch (cmd) {
 969         case MFB_SET_PIXFMT_OLD:
 970                 dev_warn(info->dev,
 971                          "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
 972                          MFB_SET_PIXFMT_OLD);
 973         case MFB_SET_PIXFMT:
 974                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
 975                         return -EFAULT;
 976                 ad->pix_fmt = pix_fmt;
 977                 break;
 978         case MFB_GET_PIXFMT_OLD:
 979                 dev_warn(info->dev,
 980                          "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
 981                          MFB_GET_PIXFMT_OLD);
 982         case MFB_GET_PIXFMT:
 983                 pix_fmt = ad->pix_fmt;
 984                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
 985                         return -EFAULT;
 986                 break;
 987         case MFB_SET_AOID:
 988                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
 989                         return -EFAULT;
 990                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
 991                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
 992                 fsl_diu_check_var(&info->var, info);
 993                 fsl_diu_set_aoi(info);
 994                 break;
 995         case MFB_GET_AOID:
 996                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
 997                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
 998                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
 999                         return -EFAULT;
1000                 break;
1001         case MFB_GET_ALPHA:
1002                 global_alpha = mfbi->g_alpha;
1003                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1004                         return -EFAULT;
1005                 break;
1006         case MFB_SET_ALPHA:
1007                 /* set panel information */
1008                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1009                         return -EFAULT;
1010                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1011                                                         (global_alpha & 0xff);
1012                 mfbi->g_alpha = global_alpha;
1013                 break;
1014         case MFB_SET_CHROMA_KEY:
1015                 /* set panel winformation */
1016                 if (copy_from_user(&ck, buf, sizeof(ck)))
1017                         return -EFAULT;
1018
1019                 if (ck.enable &&
1020                    (ck.red_max < ck.red_min ||
1021                     ck.green_max < ck.green_min ||
1022                     ck.blue_max < ck.blue_min))
1023                         return -EINVAL;
1024
1025                 if (!ck.enable) {
1026                         ad->ckmax_r = 0;
1027                         ad->ckmax_g = 0;
1028                         ad->ckmax_b = 0;
1029                         ad->ckmin_r = 255;
1030                         ad->ckmin_g = 255;
1031                         ad->ckmin_b = 255;
1032                 } else {
1033                         ad->ckmax_r = ck.red_max;
1034                         ad->ckmax_g = ck.green_max;
1035                         ad->ckmax_b = ck.blue_max;
1036                         ad->ckmin_r = ck.red_min;
1037                         ad->ckmin_g = ck.green_min;
1038                         ad->ckmin_b = ck.blue_min;
1039                 }
1040                 break;
1041         default:
1042                 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1043                 return -ENOIOCTLCMD;
1044         }
1045
1046         return 0;
1047 }
1048
1049 /* turn on fb if count == 1
1050  */
1051 static int fsl_diu_open(struct fb_info *info, int user)
1052 {
1053         struct mfb_info *mfbi = info->par;
1054         int res = 0;
1055
1056         /* free boot splash memory on first /dev/fb0 open */
1057         if (!mfbi->index && diu_ops.release_bootmem)
1058                 diu_ops.release_bootmem();
1059
1060         spin_lock(&diu_lock);
1061         mfbi->count++;
1062         if (mfbi->count == 1) {
1063                 fsl_diu_check_var(&info->var, info);
1064                 res = fsl_diu_set_par(info);
1065                 if (res < 0)
1066                         mfbi->count--;
1067                 else {
1068                         res = fsl_diu_enable_panel(info);
1069                         if (res < 0)
1070                                 mfbi->count--;
1071                 }
1072         }
1073
1074         spin_unlock(&diu_lock);
1075         return res;
1076 }
1077
1078 /* turn off fb if count == 0
1079  */
1080 static int fsl_diu_release(struct fb_info *info, int user)
1081 {
1082         struct mfb_info *mfbi = info->par;
1083         int res = 0;
1084
1085         spin_lock(&diu_lock);
1086         mfbi->count--;
1087         if (mfbi->count == 0) {
1088                 res = fsl_diu_disable_panel(info);
1089                 if (res < 0)
1090                         mfbi->count++;
1091         }
1092         spin_unlock(&diu_lock);
1093         return res;
1094 }
1095
1096 static struct fb_ops fsl_diu_ops = {
1097         .owner = THIS_MODULE,
1098         .fb_check_var = fsl_diu_check_var,
1099         .fb_set_par = fsl_diu_set_par,
1100         .fb_setcolreg = fsl_diu_setcolreg,
1101         .fb_blank = fsl_diu_blank,
1102         .fb_pan_display = fsl_diu_pan_display,
1103         .fb_fillrect = cfb_fillrect,
1104         .fb_copyarea = cfb_copyarea,
1105         .fb_imageblit = cfb_imageblit,
1106         .fb_ioctl = fsl_diu_ioctl,
1107         .fb_open = fsl_diu_open,
1108         .fb_release = fsl_diu_release,
1109 };
1110
1111 static int init_fbinfo(struct fb_info *info)
1112 {
1113         struct mfb_info *mfbi = info->par;
1114
1115         info->device = NULL;
1116         info->var.activate = FB_ACTIVATE_NOW;
1117         info->fbops = &fsl_diu_ops;
1118         info->flags = FBINFO_FLAG_DEFAULT;
1119         info->pseudo_palette = &mfbi->pseudo_palette;
1120
1121         /* Allocate colormap */
1122         fb_alloc_cmap(&info->cmap, 16, 0);
1123         return 0;
1124 }
1125
1126 static int __devinit install_fb(struct fb_info *info)
1127 {
1128         int rc;
1129         struct mfb_info *mfbi = info->par;
1130         const char *aoi_mode, *init_aoi_mode = "320x240";
1131         struct fb_videomode *db = fsl_diu_mode_db;
1132         unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1133         int has_default_mode = 1;
1134
1135         if (init_fbinfo(info))
1136                 return -EINVAL;
1137
1138         if (mfbi->index == 0) { /* plane 0 */
1139                 if (mfbi->edid_data) {
1140                         /* Now build modedb from EDID */
1141                         fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
1142                         fb_videomode_to_modelist(info->monspecs.modedb,
1143                                                  info->monspecs.modedb_len,
1144                                                  &info->modelist);
1145                         db = info->monspecs.modedb;
1146                         dbsize = info->monspecs.modedb_len;
1147                 }
1148                 aoi_mode = fb_mode;
1149         } else {
1150                 aoi_mode = init_aoi_mode;
1151         }
1152         rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1153                           default_bpp);
1154         if (!rc) {
1155                 /*
1156                  * For plane 0 we continue and look into
1157                  * driver's internal modedb.
1158                  */
1159                 if (mfbi->index == 0 && mfbi->edid_data)
1160                         has_default_mode = 0;
1161                 else
1162                         return -EINVAL;
1163         }
1164
1165         if (!has_default_mode) {
1166                 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1167                         ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1168                 if (rc)
1169                         has_default_mode = 1;
1170         }
1171
1172         /* Still not found, use preferred mode from database if any */
1173         if (!has_default_mode && info->monspecs.modedb) {
1174                 struct fb_monspecs *specs = &info->monspecs;
1175                 struct fb_videomode *modedb = &specs->modedb[0];
1176
1177                 /*
1178                  * Get preferred timing. If not found,
1179                  * first mode in database will be used.
1180                  */
1181                 if (specs->misc & FB_MISC_1ST_DETAIL) {
1182                         int i;
1183
1184                         for (i = 0; i < specs->modedb_len; i++) {
1185                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1186                                         modedb = &specs->modedb[i];
1187                                         break;
1188                                 }
1189                         }
1190                 }
1191
1192                 info->var.bits_per_pixel = default_bpp;
1193                 fb_videomode_to_var(&info->var, modedb);
1194         }
1195
1196         if (mfbi->type == MFB_TYPE_OFF)
1197                 mfbi->blank = FB_BLANK_NORMAL;
1198         else
1199                 mfbi->blank = FB_BLANK_UNBLANK;
1200
1201         if (fsl_diu_check_var(&info->var, info)) {
1202                 dev_err(info->dev, "fsl_diu_check_var failed\n");
1203                 unmap_video_memory(info);
1204                 fb_dealloc_cmap(&info->cmap);
1205                 return -EINVAL;
1206         }
1207
1208         if (register_framebuffer(info) < 0) {
1209                 dev_err(info->dev, "register_framebuffer failed\n");
1210                 unmap_video_memory(info);
1211                 fb_dealloc_cmap(&info->cmap);
1212                 return -EINVAL;
1213         }
1214
1215         mfbi->registered = 1;
1216         dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1217
1218         return 0;
1219 }
1220
1221 static void uninstall_fb(struct fb_info *info)
1222 {
1223         struct mfb_info *mfbi = info->par;
1224
1225         if (!mfbi->registered)
1226                 return;
1227
1228         if (mfbi->index == 0)
1229                 kfree(mfbi->edid_data);
1230
1231         unregister_framebuffer(info);
1232         unmap_video_memory(info);
1233         if (&info->cmap)
1234                 fb_dealloc_cmap(&info->cmap);
1235
1236         mfbi->registered = 0;
1237 }
1238
1239 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1240 {
1241         struct diu *hw = dr.diu_reg;
1242         unsigned int status = in_be32(&hw->int_status);
1243
1244         if (status) {
1245                 /* This is the workaround for underrun */
1246                 if (status & INT_UNDRUN) {
1247                         out_be32(&hw->diu_mode, 0);
1248                         udelay(1);
1249                         out_be32(&hw->diu_mode, 1);
1250                 }
1251 #if defined(CONFIG_NOT_COHERENT_CACHE)
1252                 else if (status & INT_VSYNC) {
1253                         unsigned int i;
1254
1255                         for (i = 0; i < coherence_data_size;
1256                                 i += d_cache_line_size)
1257                                 __asm__ __volatile__ (
1258                                         "dcbz 0, %[input]"
1259                                 ::[input]"r"(&coherence_data[i]));
1260                 }
1261 #endif
1262                 return IRQ_HANDLED;
1263         }
1264         return IRQ_NONE;
1265 }
1266
1267 static int request_irq_local(int irq)
1268 {
1269         u32 ints;
1270         struct diu *hw;
1271         int ret;
1272
1273         hw = dr.diu_reg;
1274
1275         /* Read to clear the status */
1276         in_be32(&hw->int_status);
1277
1278         ret = request_irq(irq, fsl_diu_isr, 0, "fsl-diu-fb", NULL);
1279         if (!ret) {
1280                 ints = INT_PARERR | INT_LS_BF_VS;
1281 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1282                 ints |= INT_VSYNC;
1283 #endif
1284
1285                 if (dr.mode == MFB_MODE2 || dr.mode == MFB_MODE3)
1286                         ints |= INT_VSYNC_WB;
1287
1288                 /* Read to clear the status */
1289                 in_be32(&hw->int_status);
1290                 out_be32(&hw->int_mask, ints);
1291         }
1292
1293         return ret;
1294 }
1295
1296 static void free_irq_local(int irq)
1297 {
1298         struct diu *hw = dr.diu_reg;
1299
1300         /* Disable all LCDC interrupt */
1301         out_be32(&hw->int_mask, 0x1f);
1302
1303         free_irq(irq, NULL);
1304 }
1305
1306 #ifdef CONFIG_PM
1307 /*
1308  * Power management hooks. Note that we won't be called from IRQ context,
1309  * unlike the blank functions above, so we may sleep.
1310  */
1311 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1312 {
1313         struct fsl_diu_data *machine_data;
1314
1315         machine_data = dev_get_drvdata(&ofdev->dev);
1316         disable_lcdc(machine_data->fsl_diu_info[0]);
1317
1318         return 0;
1319 }
1320
1321 static int fsl_diu_resume(struct platform_device *ofdev)
1322 {
1323         struct fsl_diu_data *machine_data;
1324
1325         machine_data = dev_get_drvdata(&ofdev->dev);
1326         enable_lcdc(machine_data->fsl_diu_info[0]);
1327
1328         return 0;
1329 }
1330
1331 #else
1332 #define fsl_diu_suspend NULL
1333 #define fsl_diu_resume NULL
1334 #endif                          /* CONFIG_PM */
1335
1336 /* Align to 64-bit(8-byte), 32-byte, etc. */
1337 static int allocate_buf(struct device *dev, struct diu_addr *buf, u32 size,
1338                         u32 bytes_align)
1339 {
1340         u32 offset;
1341         dma_addr_t mask;
1342
1343         buf->vaddr =
1344                 dma_alloc_coherent(dev, size + bytes_align, &buf->paddr,
1345                                    GFP_DMA | __GFP_ZERO);
1346         if (!buf->vaddr)
1347                 return -ENOMEM;
1348
1349         mask = bytes_align - 1;
1350         offset = buf->paddr & mask;
1351         if (offset) {
1352                 buf->offset = bytes_align - offset;
1353                 buf->paddr = buf->paddr + offset;
1354         } else
1355                 buf->offset = 0;
1356
1357         return 0;
1358 }
1359
1360 static void free_buf(struct device *dev, struct diu_addr *buf, u32 size,
1361                      u32 bytes_align)
1362 {
1363         dma_free_coherent(dev, size + bytes_align, buf->vaddr,
1364                           buf->paddr - buf->offset);
1365 }
1366
1367 static ssize_t store_monitor(struct device *device,
1368         struct device_attribute *attr, const char *buf, size_t count)
1369 {
1370         enum fsl_diu_monitor_port old_monitor_port;
1371         struct fsl_diu_data *machine_data =
1372                 container_of(attr, struct fsl_diu_data, dev_attr);
1373
1374         old_monitor_port = machine_data->monitor_port;
1375         machine_data->monitor_port = fsl_diu_name_to_port(buf);
1376
1377         if (old_monitor_port != machine_data->monitor_port) {
1378                 /* All AOIs need adjust pixel format
1379                  * fsl_diu_set_par only change the pixsel format here
1380                  * unlikely to fail. */
1381                 fsl_diu_set_par(machine_data->fsl_diu_info[0]);
1382                 fsl_diu_set_par(machine_data->fsl_diu_info[1]);
1383                 fsl_diu_set_par(machine_data->fsl_diu_info[2]);
1384                 fsl_diu_set_par(machine_data->fsl_diu_info[3]);
1385                 fsl_diu_set_par(machine_data->fsl_diu_info[4]);
1386         }
1387         return count;
1388 }
1389
1390 static ssize_t show_monitor(struct device *device,
1391         struct device_attribute *attr, char *buf)
1392 {
1393         struct fsl_diu_data *machine_data =
1394                 container_of(attr, struct fsl_diu_data, dev_attr);
1395
1396         switch (machine_data->monitor_port) {
1397         case FSL_DIU_PORT_DVI:
1398                 return sprintf(buf, "DVI\n");
1399         case FSL_DIU_PORT_LVDS:
1400                 return sprintf(buf, "Single-link LVDS\n");
1401         case FSL_DIU_PORT_DLVDS:
1402                 return sprintf(buf, "Dual-link LVDS\n");
1403         }
1404
1405         return 0;
1406 }
1407
1408 static int __devinit fsl_diu_probe(struct platform_device *pdev)
1409 {
1410         struct device_node *np = pdev->dev.of_node;
1411         struct mfb_info *mfbi;
1412         phys_addr_t dummy_ad_addr = 0;
1413         int ret, i, error = 0;
1414         struct fsl_diu_data *machine_data;
1415         int diu_mode;
1416
1417         machine_data = kzalloc(sizeof(struct fsl_diu_data), GFP_KERNEL);
1418         if (!machine_data)
1419                 return -ENOMEM;
1420
1421         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1422                 machine_data->fsl_diu_info[i] =
1423                         framebuffer_alloc(sizeof(struct mfb_info), &pdev->dev);
1424                 if (!machine_data->fsl_diu_info[i]) {
1425                         dev_err(&pdev->dev, "cannot allocate memory\n");
1426                         ret = -ENOMEM;
1427                         goto error2;
1428                 }
1429                 mfbi = machine_data->fsl_diu_info[i]->par;
1430                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1431                 mfbi->parent = machine_data;
1432
1433                 if (mfbi->index == 0) {
1434                         const u8 *prop;
1435                         int len;
1436
1437                         /* Get EDID */
1438                         prop = of_get_property(np, "edid", &len);
1439                         if (prop && len == EDID_LENGTH)
1440                                 mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
1441                                                           GFP_KERNEL);
1442                 }
1443         }
1444
1445         dr.diu_reg = of_iomap(np, 0);
1446         if (!dr.diu_reg) {
1447                 dev_err(&pdev->dev, "cannot map DIU registers\n");
1448                 ret = -EFAULT;
1449                 goto error2;
1450         }
1451
1452         diu_mode = in_be32(&dr.diu_reg->diu_mode);
1453         if (diu_mode != MFB_MODE1)
1454                 out_be32(&dr.diu_reg->diu_mode, 0);     /* disable DIU */
1455
1456         /* Get the IRQ of the DIU */
1457         machine_data->irq = irq_of_parse_and_map(np, 0);
1458
1459         if (!machine_data->irq) {
1460                 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1461                 ret = -EINVAL;
1462                 goto error;
1463         }
1464         machine_data->monitor_port = monitor_port;
1465
1466         /* Area descriptor memory pool aligns to 64-bit boundary */
1467         if (allocate_buf(&pdev->dev, &pool.ad,
1468                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1469                 return -ENOMEM;
1470
1471         /* Get memory for Gamma Table  - 32-byte aligned memory */
1472         if (allocate_buf(&pdev->dev, &pool.gamma, 768, 32)) {
1473                 ret = -ENOMEM;
1474                 goto error;
1475         }
1476
1477         /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1478         if (allocate_buf(&pdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1479                          32)) {
1480                 ret = -ENOMEM;
1481                 goto error;
1482         }
1483
1484         i = ARRAY_SIZE(machine_data->fsl_diu_info);
1485         machine_data->dummy_ad = (struct diu_ad *)
1486                         ((u32)pool.ad.vaddr + pool.ad.offset) + i;
1487         machine_data->dummy_ad->paddr = pool.ad.paddr +
1488                         i * sizeof(struct diu_ad);
1489         machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1490         if (!machine_data->dummy_aoi_virt) {
1491                 ret = -ENOMEM;
1492                 goto error;
1493         }
1494         machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1495         machine_data->dummy_ad->pix_fmt = 0x88882317;
1496         machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1497         machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) |  2);
1498         machine_data->dummy_ad->offset_xyi = 0;
1499         machine_data->dummy_ad->offset_xyd = 0;
1500         machine_data->dummy_ad->next_ad = 0;
1501
1502         /*
1503          * Let DIU display splash screen if it was pre-initialized
1504          * by the bootloader, set dummy area descriptor otherwise.
1505          */
1506         if (diu_mode != MFB_MODE1)
1507                 out_be32(&dr.diu_reg->desc[0], machine_data->dummy_ad->paddr);
1508
1509         out_be32(&dr.diu_reg->desc[1], machine_data->dummy_ad->paddr);
1510         out_be32(&dr.diu_reg->desc[2], machine_data->dummy_ad->paddr);
1511
1512         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1513                 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1514                 mfbi = machine_data->fsl_diu_info[i]->par;
1515                 mfbi->ad = (struct diu_ad *)((u32)pool.ad.vaddr
1516                                         + pool.ad.offset) + i;
1517                 mfbi->ad->paddr = pool.ad.paddr + i * sizeof(struct diu_ad);
1518                 ret = install_fb(machine_data->fsl_diu_info[i]);
1519                 if (ret) {
1520                         dev_err(&pdev->dev, "could not register fb %d\n", i);
1521                         goto error;
1522                 }
1523         }
1524
1525         if (request_irq_local(machine_data->irq)) {
1526                 dev_err(&pdev->dev, "could not claim irq\n");
1527                 goto error;
1528         }
1529
1530         sysfs_attr_init(&machine_data->dev_attr.attr);
1531         machine_data->dev_attr.attr.name = "monitor";
1532         machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1533         machine_data->dev_attr.show = show_monitor;
1534         machine_data->dev_attr.store = store_monitor;
1535         error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1536                                   &machine_data->dev_attr);
1537         if (error) {
1538                 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1539                         machine_data->dev_attr.attr.name);
1540         }
1541
1542         dev_set_drvdata(&pdev->dev, machine_data);
1543         return 0;
1544
1545 error:
1546         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1547                 uninstall_fb(machine_data->fsl_diu_info[i]);
1548
1549         if (pool.ad.vaddr)
1550                 free_buf(&pdev->dev, &pool.ad,
1551                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1552         if (pool.gamma.vaddr)
1553                 free_buf(&pdev->dev, &pool.gamma, 768, 32);
1554         if (pool.cursor.vaddr)
1555                 free_buf(&pdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1556                          32);
1557         if (machine_data->dummy_aoi_virt)
1558                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1559         iounmap(dr.diu_reg);
1560
1561 error2:
1562         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1563                 if (machine_data->fsl_diu_info[i])
1564                         framebuffer_release(machine_data->fsl_diu_info[i]);
1565         kfree(machine_data);
1566
1567         return ret;
1568 }
1569
1570 static int fsl_diu_remove(struct platform_device *pdev)
1571 {
1572         struct fsl_diu_data *machine_data;
1573         int i;
1574
1575         machine_data = dev_get_drvdata(&pdev->dev);
1576         disable_lcdc(machine_data->fsl_diu_info[0]);
1577         free_irq_local(machine_data->irq);
1578         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1579                 uninstall_fb(machine_data->fsl_diu_info[i]);
1580         if (pool.ad.vaddr)
1581                 free_buf(&pdev->dev, &pool.ad,
1582                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1583         if (pool.gamma.vaddr)
1584                 free_buf(&pdev->dev, &pool.gamma, 768, 32);
1585         if (pool.cursor.vaddr)
1586                 free_buf(&pdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2, 32);
1587         if (machine_data->dummy_aoi_virt)
1588                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1589         iounmap(dr.diu_reg);
1590         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1591                 if (machine_data->fsl_diu_info[i])
1592                         framebuffer_release(machine_data->fsl_diu_info[i]);
1593         kfree(machine_data);
1594
1595         return 0;
1596 }
1597
1598 #ifndef MODULE
1599 static int __init fsl_diu_setup(char *options)
1600 {
1601         char *opt;
1602         unsigned long val;
1603
1604         if (!options || !*options)
1605                 return 0;
1606
1607         while ((opt = strsep(&options, ",")) != NULL) {
1608                 if (!*opt)
1609                         continue;
1610                 if (!strncmp(opt, "monitor=", 8)) {
1611                         monitor_port = fsl_diu_name_to_port(opt + 8);
1612                 } else if (!strncmp(opt, "bpp=", 4)) {
1613                         if (!strict_strtoul(opt + 4, 10, &val))
1614                                 default_bpp = val;
1615                 } else
1616                         fb_mode = opt;
1617         }
1618
1619         return 0;
1620 }
1621 #endif
1622
1623 static struct of_device_id fsl_diu_match[] = {
1624 #ifdef CONFIG_PPC_MPC512x
1625         {
1626                 .compatible = "fsl,mpc5121-diu",
1627         },
1628 #endif
1629         {
1630                 .compatible = "fsl,diu",
1631         },
1632         {}
1633 };
1634 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1635
1636 static struct platform_driver fsl_diu_driver = {
1637         .driver = {
1638                 .name = "fsl-diu-fb",
1639                 .owner = THIS_MODULE,
1640                 .of_match_table = fsl_diu_match,
1641         },
1642         .probe          = fsl_diu_probe,
1643         .remove         = fsl_diu_remove,
1644         .suspend        = fsl_diu_suspend,
1645         .resume         = fsl_diu_resume,
1646 };
1647
1648 static int __init fsl_diu_init(void)
1649 {
1650 #ifdef CONFIG_NOT_COHERENT_CACHE
1651         struct device_node *np;
1652         const u32 *prop;
1653 #endif
1654         int ret;
1655 #ifndef MODULE
1656         char *option;
1657
1658         /*
1659          * For kernel boot options (in 'video=xxxfb:<options>' format)
1660          */
1661         if (fb_get_options("fslfb", &option))
1662                 return -ENODEV;
1663         fsl_diu_setup(option);
1664 #else
1665         monitor_port = fsl_diu_name_to_port(monitor_string);
1666 #endif
1667         pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1668
1669 #ifdef CONFIG_NOT_COHERENT_CACHE
1670         np = of_find_node_by_type(NULL, "cpu");
1671         if (!np) {
1672                 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1673                 return -ENODEV;
1674         }
1675
1676         prop = of_get_property(np, "d-cache-size", NULL);
1677         if (prop == NULL) {
1678                 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1679                        "in 'cpu' node\n");
1680                 of_node_put(np);
1681                 return -ENODEV;
1682         }
1683
1684         /*
1685          * Freescale PLRU requires 13/8 times the cache size to do a proper
1686          * displacement flush
1687          */
1688         coherence_data_size = be32_to_cpup(prop) * 13;
1689         coherence_data_size /= 8;
1690
1691         prop = of_get_property(np, "d-cache-line-size", NULL);
1692         if (prop == NULL) {
1693                 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1694                        "in 'cpu' node\n");
1695                 of_node_put(np);
1696                 return -ENODEV;
1697         }
1698         d_cache_line_size = be32_to_cpup(prop);
1699
1700         of_node_put(np);
1701         coherence_data = vmalloc(coherence_data_size);
1702         if (!coherence_data)
1703                 return -ENOMEM;
1704 #endif
1705
1706         ret = platform_driver_register(&fsl_diu_driver);
1707         if (ret) {
1708                 pr_err("fsl-diu-fb: failed to register platform driver\n");
1709 #if defined(CONFIG_NOT_COHERENT_CACHE)
1710                 vfree(coherence_data);
1711 #endif
1712                 iounmap(dr.diu_reg);
1713         }
1714         return ret;
1715 }
1716
1717 static void __exit fsl_diu_exit(void)
1718 {
1719         platform_driver_unregister(&fsl_diu_driver);
1720 #if defined(CONFIG_NOT_COHERENT_CACHE)
1721         vfree(coherence_data);
1722 #endif
1723 }
1724
1725 module_init(fsl_diu_init);
1726 module_exit(fsl_diu_exit);
1727
1728 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1729 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1730 MODULE_LICENSE("GPL");
1731
1732 module_param_named(mode, fb_mode, charp, 0);
1733 MODULE_PARM_DESC(mode,
1734         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1735 module_param_named(bpp, default_bpp, ulong, 0);
1736 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1737 module_param_named(monitor, monitor_string, charp, 0);
1738 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1739         "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1740