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 #include <linux/spinlock.h>
  34
  35 #include <sysdev/fsl_soc.h>
  36 #include <linux/fsl-diu-fb.h>
  37 #include "edid.h"
  38
  39 #define NUM_AOIS        5       /* 1 for plane 0, 2 for planes 1 & 2 each */
  40
  41 /* HW cursor parameters */
  42 #define MAX_CURS                32
  43
  44 /* INT_STATUS/INT_MASK field descriptions */
  45 #define INT_VSYNC       0x01    /* Vsync interrupt  */
  46 #define INT_VSYNC_WB    0x02    /* Vsync interrupt for write back operation */
  47 #define INT_UNDRUN      0x04    /* Under run exception interrupt */
  48 #define INT_PARERR      0x08    /* Display parameters error interrupt */
  49 #define INT_LS_BF_VS    0x10    /* Lines before vsync. interrupt */
  50
  51 /*
  52  * List of supported video modes
  53  *
  54  * The first entry is the default video mode.  The remain entries are in
  55  * order if increasing resolution and frequency.  The 320x240-60 mode is
  56  * the initial AOI for the second and third planes.
  57  */
  58 static struct fb_videomode fsl_diu_mode_db[] = {
  59         {
  60                 .refresh        = 60,
  61                 .xres           = 1024,
  62                 .yres           = 768,
  63                 .pixclock       = 15385,
  64                 .left_margin    = 160,
  65                 .right_margin   = 24,
  66                 .upper_margin   = 29,
  67                 .lower_margin   = 3,
  68                 .hsync_len      = 136,
  69                 .vsync_len      = 6,
  70                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  71                 .vmode          = FB_VMODE_NONINTERLACED
  72         },
  73         {
  74                 .refresh        = 60,
  75                 .xres           = 320,
  76                 .yres           = 240,
  77                 .pixclock       = 79440,
  78                 .left_margin    = 16,
  79                 .right_margin   = 16,
  80                 .upper_margin   = 16,
  81                 .lower_margin   = 5,
  82                 .hsync_len      = 48,
  83                 .vsync_len      = 1,
  84                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  85                 .vmode          = FB_VMODE_NONINTERLACED
  86         },
  87         {
  88                 .refresh        = 60,
  89                 .xres           = 640,
  90                 .yres           = 480,
  91                 .pixclock       = 39722,
  92                 .left_margin    = 48,
  93                 .right_margin   = 16,
  94                 .upper_margin   = 33,
  95                 .lower_margin   = 10,
  96                 .hsync_len      = 96,
  97                 .vsync_len      = 2,
  98                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  99                 .vmode          = FB_VMODE_NONINTERLACED
 100         },
 101         {
 102                 .refresh        = 72,
 103                 .xres           = 640,
 104                 .yres           = 480,
 105                 .pixclock       = 32052,
 106                 .left_margin    = 128,
 107                 .right_margin   = 24,
 108                 .upper_margin   = 28,
 109                 .lower_margin   = 9,
 110                 .hsync_len      = 40,
 111                 .vsync_len      = 3,
 112                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 113                 .vmode          = FB_VMODE_NONINTERLACED
 114         },
 115         {
 116                 .refresh        = 75,
 117                 .xres           = 640,
 118                 .yres           = 480,
 119                 .pixclock       = 31747,
 120                 .left_margin    = 120,
 121                 .right_margin   = 16,
 122                 .upper_margin   = 16,
 123                 .lower_margin   = 1,
 124                 .hsync_len      = 64,
 125                 .vsync_len      = 3,
 126                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 127                 .vmode          = FB_VMODE_NONINTERLACED
 128         },
 129         {
 130                 .refresh        = 90,
 131                 .xres           = 640,
 132                 .yres           = 480,
 133                 .pixclock       = 25057,
 134                 .left_margin    = 120,
 135                 .right_margin   = 32,
 136                 .upper_margin   = 14,
 137                 .lower_margin   = 25,
 138                 .hsync_len      = 40,
 139                 .vsync_len      = 14,
 140                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 141                 .vmode          = FB_VMODE_NONINTERLACED
 142         },
 143         {
 144                 .refresh        = 100,
 145                 .xres           = 640,
 146                 .yres           = 480,
 147                 .pixclock       = 22272,
 148                 .left_margin    = 48,
 149                 .right_margin   = 32,
 150                 .upper_margin   = 17,
 151                 .lower_margin   = 22,
 152                 .hsync_len      = 128,
 153                 .vsync_len      = 12,
 154                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 155                 .vmode          = FB_VMODE_NONINTERLACED
 156         },
 157         {
 158                 .refresh        = 60,
 159                 .xres           = 800,
 160                 .yres           = 480,
 161                 .pixclock       = 33805,
 162                 .left_margin    = 96,
 163                 .right_margin   = 24,
 164                 .upper_margin   = 10,
 165                 .lower_margin   = 3,
 166                 .hsync_len      = 72,
 167                 .vsync_len      = 7,
 168                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 169                 .vmode          = FB_VMODE_NONINTERLACED
 170         },
 171         {
 172                 .refresh        = 60,
 173                 .xres           = 800,
 174                 .yres           = 600,
 175                 .pixclock       = 25000,
 176                 .left_margin    = 88,
 177                 .right_margin   = 40,
 178                 .upper_margin   = 23,
 179                 .lower_margin   = 1,
 180                 .hsync_len      = 128,
 181                 .vsync_len      = 4,
 182                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 183                 .vmode          = FB_VMODE_NONINTERLACED
 184         },
 185         {
 186                 .refresh        = 60,
 187                 .xres           = 854,
 188                 .yres           = 480,
 189                 .pixclock       = 31518,
 190                 .left_margin    = 104,
 191                 .right_margin   = 16,
 192                 .upper_margin   = 13,
 193                 .lower_margin   = 1,
 194                 .hsync_len      = 88,
 195                 .vsync_len      = 3,
 196                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 197                 .vmode          = FB_VMODE_NONINTERLACED
 198         },
 199         {
 200                 .refresh        = 70,
 201                 .xres           = 1024,
 202                 .yres           = 768,
 203                 .pixclock       = 16886,
 204                 .left_margin    = 3,
 205                 .right_margin   = 3,
 206                 .upper_margin   = 2,
 207                 .lower_margin   = 2,
 208                 .hsync_len      = 40,
 209                 .vsync_len      = 18,
 210                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 211                 .vmode          = FB_VMODE_NONINTERLACED
 212         },
 213         {
 214                 .refresh        = 75,
 215                 .xres           = 1024,
 216                 .yres           = 768,
 217                 .pixclock       = 15009,
 218                 .left_margin    = 3,
 219                 .right_margin   = 3,
 220                 .upper_margin   = 2,
 221                 .lower_margin   = 2,
 222                 .hsync_len      = 80,
 223                 .vsync_len      = 32,
 224                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 225                 .vmode          = FB_VMODE_NONINTERLACED
 226         },
 227         {
 228                 .refresh        = 60,
 229                 .xres           = 1280,
 230                 .yres           = 480,
 231                 .pixclock       = 18939,
 232                 .left_margin    = 353,
 233                 .right_margin   = 47,
 234                 .upper_margin   = 39,
 235                 .lower_margin   = 4,
 236                 .hsync_len      = 8,
 237                 .vsync_len      = 2,
 238                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 239                 .vmode          = FB_VMODE_NONINTERLACED
 240         },
 241         {
 242                 .refresh        = 60,
 243                 .xres           = 1280,
 244                 .yres           = 720,
 245                 .pixclock       = 13426,
 246                 .left_margin    = 192,
 247                 .right_margin   = 64,
 248                 .upper_margin   = 22,
 249                 .lower_margin   = 1,
 250                 .hsync_len      = 136,
 251                 .vsync_len      = 3,
 252                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 253                 .vmode          = FB_VMODE_NONINTERLACED
 254         },
 255         {
 256                 .refresh        = 60,
 257                 .xres           = 1280,
 258                 .yres           = 1024,
 259                 .pixclock       = 9375,
 260                 .left_margin    = 38,
 261                 .right_margin   = 128,
 262                 .upper_margin   = 2,
 263                 .lower_margin   = 7,
 264                 .hsync_len      = 216,
 265                 .vsync_len      = 37,
 266                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 267                 .vmode          = FB_VMODE_NONINTERLACED
 268         },
 269         {
 270                 .refresh        = 70,
 271                 .xres           = 1280,
 272                 .yres           = 1024,
 273                 .pixclock       = 9380,
 274                 .left_margin    = 6,
 275                 .right_margin   = 6,
 276                 .upper_margin   = 4,
 277                 .lower_margin   = 4,
 278                 .hsync_len      = 60,
 279                 .vsync_len      = 94,
 280                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 281                 .vmode          = FB_VMODE_NONINTERLACED
 282         },
 283         {
 284                 .refresh        = 75,
 285                 .xres           = 1280,
 286                 .yres           = 1024,
 287                 .pixclock       = 9380,
 288                 .left_margin    = 6,
 289                 .right_margin   = 6,
 290                 .upper_margin   = 4,
 291                 .lower_margin   = 4,
 292                 .hsync_len      = 60,
 293                 .vsync_len      = 15,
 294                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 295                 .vmode          = FB_VMODE_NONINTERLACED
 296         },
 297         {
 298                 .refresh        = 60,
 299                 .xres           = 1920,
 300                 .yres           = 1080,
 301                 .pixclock       = 5787,
 302                 .left_margin    = 328,
 303                 .right_margin   = 120,
 304                 .upper_margin   = 34,
 305                 .lower_margin   = 1,
 306                 .hsync_len      = 208,
 307                 .vsync_len      = 3,
 308                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 309                 .vmode          = FB_VMODE_NONINTERLACED
 310         },
 311 };
 312
 313 static char *fb_mode;
 314 static unsigned long default_bpp = 32;
 315 static enum fsl_diu_monitor_port monitor_port;
 316 static char *monitor_string;
 317
 318 #if defined(CONFIG_NOT_COHERENT_CACHE)
 319 static u8 *coherence_data;
 320 static size_t coherence_data_size;
 321 static unsigned int d_cache_line_size;
 322 #endif
 323
 324 static DEFINE_SPINLOCK(diu_lock);
 325
 326 enum mfb_index {
 327         PLANE0 = 0,     /* Plane 0, only one AOI that fills the screen */
 328         PLANE1_AOI0,    /* Plane 1, first AOI */
 329         PLANE1_AOI1,    /* Plane 1, second AOI */
 330         PLANE2_AOI0,    /* Plane 2, first AOI */
 331         PLANE2_AOI1,    /* Plane 2, second AOI */
 332 };
 333
 334 struct mfb_info {
 335         enum mfb_index index;
 336         char *id;
 337         int registered;
 338         unsigned long pseudo_palette[16];
 339         struct diu_ad *ad;
 340         unsigned char g_alpha;
 341         unsigned int count;
 342         int x_aoi_d;            /* aoi display x offset to physical screen */
 343         int y_aoi_d;            /* aoi display y offset to physical screen */
 344         struct fsl_diu_data *parent;
 345 };
 346
 347 /**
 348  * struct fsl_diu_data - per-DIU data structure
 349  * @dma_addr: DMA address of this structure
 350  * @fsl_diu_info: fb_info objects, one per AOI
 351  * @dev_attr: sysfs structure
 352  * @irq: IRQ
 353  * @monitor_port: the monitor port this DIU is connected to
 354  * @diu_reg: pointer to the DIU hardware registers
 355  * @reg_lock: spinlock for register access
 356  * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
 357  * dummy_ad: DIU Area Descriptor for the dummy AOI
 358  * @ad[]: Area Descriptors for each real AOI
 359  * @gamma: gamma color table
 360  * @cursor: hardware cursor data
 361  *
 362  * This data structure must be allocated with 32-byte alignment, so that the
 363  * internal fields can be aligned properly.
 364  */
 365 struct fsl_diu_data {
 366         dma_addr_t dma_addr;
 367         struct fb_info fsl_diu_info[NUM_AOIS];
 368         struct mfb_info mfb[NUM_AOIS];
 369         struct device_attribute dev_attr;
 370         unsigned int irq;
 371         enum fsl_diu_monitor_port monitor_port;
 372         struct diu __iomem *diu_reg;
 373         spinlock_t reg_lock;
 374         u8 dummy_aoi[4 * 4 * 4];
 375         struct diu_ad dummy_ad __aligned(8);
 376         struct diu_ad ad[NUM_AOIS] __aligned(8);
 377         u8 gamma[256 * 3] __aligned(32);
 378         /* It's easier to parse the cursor data as little-endian */
 379         __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
 380         /* Blank cursor data -- used to hide the cursor */
 381         __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
 382         uint8_t edid_data[EDID_LENGTH];
 383         bool has_edid;
 384 } __aligned(32);
 385
 386 /* Determine the DMA address of a member of the fsl_diu_data structure */
 387 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
 388
 389 static struct mfb_info mfb_template[] = {
 390         {
 391                 .index = PLANE0,
 392                 .id = "Panel0",
 393                 .registered = 0,
 394                 .count = 0,
 395                 .x_aoi_d = 0,
 396                 .y_aoi_d = 0,
 397         },
 398         {
 399                 .index = PLANE1_AOI0,
 400                 .id = "Panel1 AOI0",
 401                 .registered = 0,
 402                 .g_alpha = 0xff,
 403                 .count = 0,
 404                 .x_aoi_d = 0,
 405                 .y_aoi_d = 0,
 406         },
 407         {
 408                 .index = PLANE1_AOI1,
 409                 .id = "Panel1 AOI1",
 410                 .registered = 0,
 411                 .g_alpha = 0xff,
 412                 .count = 0,
 413                 .x_aoi_d = 0,
 414                 .y_aoi_d = 480,
 415         },
 416         {
 417                 .index = PLANE2_AOI0,
 418                 .id = "Panel2 AOI0",
 419                 .registered = 0,
 420                 .g_alpha = 0xff,
 421                 .count = 0,
 422                 .x_aoi_d = 640,
 423                 .y_aoi_d = 0,
 424         },
 425         {
 426                 .index = PLANE2_AOI1,
 427                 .id = "Panel2 AOI1",
 428                 .registered = 0,
 429                 .g_alpha = 0xff,
 430                 .count = 0,
 431                 .x_aoi_d = 640,
 432                 .y_aoi_d = 480,
 433         },
 434 };
 435
 436 #ifdef DEBUG
 437 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
 438 {
 439         mb();
 440         pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
 441                  "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
 442                  "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
 443                  "thresholds=%08x int_mask=%08x plut=%08x\n",
 444                  hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
 445                  hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
 446                  hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
 447                  hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
 448         rmb();
 449 }
 450 #endif
 451
 452 /**
 453  * fsl_diu_name_to_port - convert a port name to a monitor port enum
 454  *
 455  * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
 456  * the enum fsl_diu_monitor_port that corresponds to that string.
 457  *
 458  * For compatibility with older versions, a number ("0", "1", or "2") is also
 459  * supported.
 460  *
 461  * If the string is unknown, DVI is assumed.
 462  *
 463  * If the particular port is not supported by the platform, another port
 464  * (platform-specific) is chosen instead.
 465  */
 466 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
 467 {
 468         enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
 469         unsigned long val;
 470
 471         if (s) {
 472                 if (!kstrtoul(s, 10, &val) && (val <= 2))
 473                         port = (enum fsl_diu_monitor_port) val;
 474                 else if (strncmp(s, "lvds", 4) == 0)
 475                         port = FSL_DIU_PORT_LVDS;
 476                 else if (strncmp(s, "dlvds", 5) == 0)
 477                         port = FSL_DIU_PORT_DLVDS;
 478         }
 479
 480         return diu_ops.valid_monitor_port(port);
 481 }
 482
 483 /*
 484  * Workaround for failed writing desc register of planes.
 485  * Needed with MPC5121 DIU rev 2.0 silicon.
 486  */
 487 void wr_reg_wa(u32 *reg, u32 val)
 488 {
 489         do {
 490                 out_be32(reg, val);
 491         } while (in_be32(reg) != val);
 492 }
 493
 494 static void fsl_diu_enable_panel(struct fb_info *info)
 495 {
 496         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 497         struct diu_ad *ad = mfbi->ad;
 498         struct fsl_diu_data *data = mfbi->parent;
 499         struct diu __iomem *hw = data->diu_reg;
 500
 501         switch (mfbi->index) {
 502         case PLANE0:
 503                 wr_reg_wa(&hw->desc[0], ad->paddr);
 504                 break;
 505         case PLANE1_AOI0:
 506                 cmfbi = &data->mfb[2];
 507                 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
 508                         if (cmfbi->count > 0)   /* AOI1 open */
 509                                 ad->next_ad =
 510                                         cpu_to_le32(cmfbi->ad->paddr);
 511                         else
 512                                 ad->next_ad = 0;
 513                         wr_reg_wa(&hw->desc[1], ad->paddr);
 514                 }
 515                 break;
 516         case PLANE2_AOI0:
 517                 cmfbi = &data->mfb[4];
 518                 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
 519                         if (cmfbi->count > 0)   /* AOI1 open */
 520                                 ad->next_ad =
 521                                         cpu_to_le32(cmfbi->ad->paddr);
 522                         else
 523                                 ad->next_ad = 0;
 524                         wr_reg_wa(&hw->desc[2], ad->paddr);
 525                 }
 526                 break;
 527         case PLANE1_AOI1:
 528                 pmfbi = &data->mfb[1];
 529                 ad->next_ad = 0;
 530                 if (hw->desc[1] == data->dummy_ad.paddr)
 531                         wr_reg_wa(&hw->desc[1], ad->paddr);
 532                 else                                    /* AOI0 open */
 533                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 534                 break;
 535         case PLANE2_AOI1:
 536                 pmfbi = &data->mfb[3];
 537                 ad->next_ad = 0;
 538                 if (hw->desc[2] == data->dummy_ad.paddr)
 539                         wr_reg_wa(&hw->desc[2], ad->paddr);
 540                 else                            /* AOI0 was open */
 541                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 542                 break;
 543         }
 544 }
 545
 546 static void fsl_diu_disable_panel(struct fb_info *info)
 547 {
 548         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 549         struct diu_ad *ad = mfbi->ad;
 550         struct fsl_diu_data *data = mfbi->parent;
 551         struct diu __iomem *hw = data->diu_reg;
 552
 553         switch (mfbi->index) {
 554         case PLANE0:
 555                 wr_reg_wa(&hw->desc[0], 0);
 556                 break;
 557         case PLANE1_AOI0:
 558                 cmfbi = &data->mfb[2];
 559                 if (cmfbi->count > 0)   /* AOI1 is open */
 560                         wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
 561                                         /* move AOI1 to the first */
 562                 else                    /* AOI1 was closed */
 563                         wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
 564                                         /* close AOI 0 */
 565                 break;
 566         case PLANE2_AOI0:
 567                 cmfbi = &data->mfb[4];
 568                 if (cmfbi->count > 0)   /* AOI1 is open */
 569                         wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
 570                                         /* move AOI1 to the first */
 571                 else                    /* AOI1 was closed */
 572                         wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
 573                                         /* close AOI 0 */
 574                 break;
 575         case PLANE1_AOI1:
 576                 pmfbi = &data->mfb[1];
 577                 if (hw->desc[1] != ad->paddr) {
 578                                 /* AOI1 is not the first in the chain */
 579                         if (pmfbi->count > 0)
 580                                         /* AOI0 is open, must be the first */
 581                                 pmfbi->ad->next_ad = 0;
 582                 } else                  /* AOI1 is the first in the chain */
 583                         wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
 584                                         /* close AOI 1 */
 585                 break;
 586         case PLANE2_AOI1:
 587                 pmfbi = &data->mfb[3];
 588                 if (hw->desc[2] != ad->paddr) {
 589                                 /* AOI1 is not the first in the chain */
 590                         if (pmfbi->count > 0)
 591                                 /* AOI0 is open, must be the first */
 592                                 pmfbi->ad->next_ad = 0;
 593                 } else          /* AOI1 is the first in the chain */
 594                         wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
 595                                 /* close AOI 1 */
 596                 break;
 597         }
 598 }
 599
 600 static void enable_lcdc(struct fb_info *info)
 601 {
 602         struct mfb_info *mfbi = info->par;
 603         struct fsl_diu_data *data = mfbi->parent;
 604         struct diu __iomem *hw = data->diu_reg;
 605
 606         out_be32(&hw->diu_mode, MFB_MODE1);
 607 }
 608
 609 static void disable_lcdc(struct fb_info *info)
 610 {
 611         struct mfb_info *mfbi = info->par;
 612         struct fsl_diu_data *data = mfbi->parent;
 613         struct diu __iomem *hw = data->diu_reg;
 614
 615         out_be32(&hw->diu_mode, 0);
 616 }
 617
 618 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 619                                 struct fb_info *info)
 620 {
 621         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
 622         struct fsl_diu_data *data = mfbi->parent;
 623         int available_height, upper_aoi_bottom;
 624         enum mfb_index index = mfbi->index;
 625         int lower_aoi_is_open, upper_aoi_is_open;
 626         __u32 base_plane_width, base_plane_height, upper_aoi_height;
 627
 628         base_plane_width = data->fsl_diu_info[0].var.xres;
 629         base_plane_height = data->fsl_diu_info[0].var.yres;
 630
 631         if (mfbi->x_aoi_d < 0)
 632                 mfbi->x_aoi_d = 0;
 633         if (mfbi->y_aoi_d < 0)
 634                 mfbi->y_aoi_d = 0;
 635         switch (index) {
 636         case PLANE0:
 637                 if (mfbi->x_aoi_d != 0)
 638                         mfbi->x_aoi_d = 0;
 639                 if (mfbi->y_aoi_d != 0)
 640                         mfbi->y_aoi_d = 0;
 641                 break;
 642         case PLANE1_AOI0:
 643         case PLANE2_AOI0:
 644                 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
 645                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
 646                 if (var->xres > base_plane_width)
 647                         var->xres = base_plane_width;
 648                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 649                         mfbi->x_aoi_d = base_plane_width - var->xres;
 650
 651                 if (lower_aoi_is_open)
 652                         available_height = lower_aoi_mfbi->y_aoi_d;
 653                 else
 654                         available_height = base_plane_height;
 655                 if (var->yres > available_height)
 656                         var->yres = available_height;
 657                 if ((mfbi->y_aoi_d + var->yres) > available_height)
 658                         mfbi->y_aoi_d = available_height - var->yres;
 659                 break;
 660         case PLANE1_AOI1:
 661         case PLANE2_AOI1:
 662                 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
 663                 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
 664                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
 665                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
 666                 if (var->xres > base_plane_width)
 667                         var->xres = base_plane_width;
 668                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 669                         mfbi->x_aoi_d = base_plane_width - var->xres;
 670                 if (mfbi->y_aoi_d < 0)
 671                         mfbi->y_aoi_d = 0;
 672                 if (upper_aoi_is_open) {
 673                         if (mfbi->y_aoi_d < upper_aoi_bottom)
 674                                 mfbi->y_aoi_d = upper_aoi_bottom;
 675                         available_height = base_plane_height
 676                                                 - upper_aoi_bottom;
 677                 } else
 678                         available_height = base_plane_height;
 679                 if (var->yres > available_height)
 680                         var->yres = available_height;
 681                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
 682                         mfbi->y_aoi_d = base_plane_height - var->yres;
 683                 break;
 684         }
 685 }
 686 /*
 687  * Checks to see if the hardware supports the state requested by var passed
 688  * in. This function does not alter the hardware state! If the var passed in
 689  * is slightly off by what the hardware can support then we alter the var
 690  * PASSED in to what we can do. If the hardware doesn't support mode change
 691  * a -EINVAL will be returned by the upper layers.
 692  */
 693 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 694                                 struct fb_info *info)
 695 {
 696         if (var->xres_virtual < var->xres)
 697                 var->xres_virtual = var->xres;
 698         if (var->yres_virtual < var->yres)
 699                 var->yres_virtual = var->yres;
 700
 701         if (var->xoffset < 0)
 702                 var->xoffset = 0;
 703
 704         if (var->yoffset < 0)
 705                 var->yoffset = 0;
 706
 707         if (var->xoffset + info->var.xres > info->var.xres_virtual)
 708                 var->xoffset = info->var.xres_virtual - info->var.xres;
 709
 710         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 711                 var->yoffset = info->var.yres_virtual - info->var.yres;
 712
 713         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 714             (var->bits_per_pixel != 16))
 715                 var->bits_per_pixel = default_bpp;
 716
 717         switch (var->bits_per_pixel) {
 718         case 16:
 719                 var->red.length = 5;
 720                 var->red.offset = 11;
 721                 var->red.msb_right = 0;
 722
 723                 var->green.length = 6;
 724                 var->green.offset = 5;
 725                 var->green.msb_right = 0;
 726
 727                 var->blue.length = 5;
 728                 var->blue.offset = 0;
 729                 var->blue.msb_right = 0;
 730
 731                 var->transp.length = 0;
 732                 var->transp.offset = 0;
 733                 var->transp.msb_right = 0;
 734                 break;
 735         case 24:
 736                 var->red.length = 8;
 737                 var->red.offset = 0;
 738                 var->red.msb_right = 0;
 739
 740                 var->green.length = 8;
 741                 var->green.offset = 8;
 742                 var->green.msb_right = 0;
 743
 744                 var->blue.length = 8;
 745                 var->blue.offset = 16;
 746                 var->blue.msb_right = 0;
 747
 748                 var->transp.length = 0;
 749                 var->transp.offset = 0;
 750                 var->transp.msb_right = 0;
 751                 break;
 752         case 32:
 753                 var->red.length = 8;
 754                 var->red.offset = 16;
 755                 var->red.msb_right = 0;
 756
 757                 var->green.length = 8;
 758                 var->green.offset = 8;
 759                 var->green.msb_right = 0;
 760
 761                 var->blue.length = 8;
 762                 var->blue.offset = 0;
 763                 var->blue.msb_right = 0;
 764
 765                 var->transp.length = 8;
 766                 var->transp.offset = 24;
 767                 var->transp.msb_right = 0;
 768
 769                 break;
 770         }
 771
 772         var->height = -1;
 773         var->width = -1;
 774         var->grayscale = 0;
 775
 776         /* Copy nonstd field to/from sync for fbset usage */
 777         var->sync |= var->nonstd;
 778         var->nonstd |= var->sync;
 779
 780         adjust_aoi_size_position(var, info);
 781         return 0;
 782 }
 783
 784 static void set_fix(struct fb_info *info)
 785 {
 786         struct fb_fix_screeninfo *fix = &info->fix;
 787         struct fb_var_screeninfo *var = &info->var;
 788         struct mfb_info *mfbi = info->par;
 789
 790         strncpy(fix->id, mfbi->id, sizeof(fix->id));
 791         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 792         fix->type = FB_TYPE_PACKED_PIXELS;
 793         fix->accel = FB_ACCEL_NONE;
 794         fix->visual = FB_VISUAL_TRUECOLOR;
 795         fix->xpanstep = 1;
 796         fix->ypanstep = 1;
 797 }
 798
 799 static void update_lcdc(struct fb_info *info)
 800 {
 801         struct fb_var_screeninfo *var = &info->var;
 802         struct mfb_info *mfbi = info->par;
 803         struct fsl_diu_data *data = mfbi->parent;
 804         struct diu __iomem *hw;
 805         int i, j;
 806         u8 *gamma_table_base;
 807
 808         u32 temp;
 809
 810         hw = data->diu_reg;
 811
 812         if (diu_ops.set_monitor_port)
 813                 diu_ops.set_monitor_port(data->monitor_port);
 814         gamma_table_base = data->gamma;
 815
 816         /* Prep for DIU init  - gamma table, cursor table */
 817
 818         for (i = 0; i <= 2; i++)
 819                 for (j = 0; j <= 255; j++)
 820                         *gamma_table_base++ = j;
 821
 822         if (diu_ops.set_gamma_table)
 823                 diu_ops.set_gamma_table(data->monitor_port, data->gamma);
 824
 825         disable_lcdc(info);
 826
 827         /* Program DIU registers */
 828
 829         out_be32(&hw->gamma, DMA_ADDR(data, gamma));
 830
 831         out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
 832         out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
 833
 834         /* Horizontal and vertical configuration register */
 835         temp = var->left_margin << 22 | /* BP_H */
 836                var->hsync_len << 11 |   /* PW_H */
 837                var->right_margin;       /* FP_H */
 838
 839         out_be32(&hw->hsyn_para, temp);
 840
 841         temp = var->upper_margin << 22 | /* BP_V */
 842                var->vsync_len << 11 |    /* PW_V  */
 843                var->lower_margin;        /* FP_V  */
 844
 845         out_be32(&hw->vsyn_para, temp);
 846
 847         diu_ops.set_pixel_clock(var->pixclock);
 848
 849 #ifndef CONFIG_PPC_MPC512x
 850         /*
 851          * The PLUT register is defined differently on the MPC5121 than it
 852          * is on other SOCs.  Unfortunately, there's no documentation that
 853          * explains how it's supposed to be programmed, so for now, we leave
 854          * it at the default value on the MPC5121.
 855          *
 856          * For other SOCs, program it for the highest priority, which will
 857          * reduce the chance of underrun. Technically, we should scale the
 858          * priority to match the screen resolution, but doing that properly
 859          * requires delicate fine-tuning for each use-case.
 860          */
 861         out_be32(&hw->plut, 0x01F5F666);
 862 #endif
 863
 864         /* Enable the DIU */
 865         enable_lcdc(info);
 866 }
 867
 868 static int map_video_memory(struct fb_info *info)
 869 {
 870         u32 smem_len = info->fix.line_length * info->var.yres_virtual;
 871         void *p;
 872
 873         p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
 874         if (!p) {
 875                 dev_err(info->dev, "unable to allocate fb memory\n");
 876                 return -ENOMEM;
 877         }
 878         mutex_lock(&info->mm_lock);
 879         info->screen_base = p;
 880         info->fix.smem_start = virt_to_phys(info->screen_base);
 881         info->fix.smem_len = smem_len;
 882         mutex_unlock(&info->mm_lock);
 883         info->screen_size = info->fix.smem_len;
 884
 885         return 0;
 886 }
 887
 888 static void unmap_video_memory(struct fb_info *info)
 889 {
 890         void *p = info->screen_base;
 891         size_t l = info->fix.smem_len;
 892
 893         mutex_lock(&info->mm_lock);
 894         info->screen_base = NULL;
 895         info->fix.smem_start = 0;
 896         info->fix.smem_len = 0;
 897         mutex_unlock(&info->mm_lock);
 898
 899         if (p)
 900                 free_pages_exact(p, l);
 901 }
 902
 903 /*
 904  * Using the fb_var_screeninfo in fb_info we set the aoi of this
 905  * particular framebuffer. It is a light version of fsl_diu_set_par.
 906  */
 907 static int fsl_diu_set_aoi(struct fb_info *info)
 908 {
 909         struct fb_var_screeninfo *var = &info->var;
 910         struct mfb_info *mfbi = info->par;
 911         struct diu_ad *ad = mfbi->ad;
 912
 913         /* AOI should not be greater than display size */
 914         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 915         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 916         return 0;
 917 }
 918
 919 /**
 920  * fsl_diu_get_pixel_format: return the pixel format for a given color depth
 921  *
 922  * The pixel format is a 32-bit value that determine which bits in each
 923  * pixel are to be used for each color.  This is the default function used
 924  * if the platform does not define its own version.
 925  */
 926 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
 927 {
 928 #define PF_BYTE_F               0x10000000
 929 #define PF_ALPHA_C_MASK         0x0E000000
 930 #define PF_ALPHA_C_SHIFT        25
 931 #define PF_BLUE_C_MASK          0x01800000
 932 #define PF_BLUE_C_SHIFT         23
 933 #define PF_GREEN_C_MASK         0x00600000
 934 #define PF_GREEN_C_SHIFT        21
 935 #define PF_RED_C_MASK           0x00180000
 936 #define PF_RED_C_SHIFT          19
 937 #define PF_PALETTE              0x00040000
 938 #define PF_PIXEL_S_MASK         0x00030000
 939 #define PF_PIXEL_S_SHIFT        16
 940 #define PF_COMP_3_MASK          0x0000F000
 941 #define PF_COMP_3_SHIFT         12
 942 #define PF_COMP_2_MASK          0x00000F00
 943 #define PF_COMP_2_SHIFT         8
 944 #define PF_COMP_1_MASK          0x000000F0
 945 #define PF_COMP_1_SHIFT         4
 946 #define PF_COMP_0_MASK          0x0000000F
 947 #define PF_COMP_0_SHIFT         0
 948
 949 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
 950         cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
 951         (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
 952         (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
 953         (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
 954         (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
 955
 956         switch (bits_per_pixel) {
 957         case 32:
 958                 /* 0x88883316 */
 959                 return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
 960         case 24:
 961                 /* 0x88082219 */
 962                 return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
 963         case 16:
 964                 /* 0x65053118 */
 965                 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
 966         default:
 967                 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
 968                 return 0;
 969         }
 970 }
 971
 972 /*
 973  * Copies a cursor image from user space to the proper place in driver
 974  * memory so that the hardware can display the cursor image.
 975  *
 976  * Cursor data is represented as a sequence of 'width' bits packed into bytes.
 977  * That is, the first 8 bits are in the first byte, the second 8 bits in the
 978  * second byte, and so on.  Therefore, the each row of the cursor is (width +
 979  * 7) / 8 bytes of 'data'
 980  *
 981  * The DIU only supports cursors up to 32x32 (MAX_CURS).  We reject cursors
 982  * larger than this, so we already know that 'width' <= 32.  Therefore, we can
 983  * simplify our code by using a 32-bit big-endian integer ("line") to read in
 984  * a single line of pixels, and only look at the top 'width' bits of that
 985  * integer.
 986  *
 987  * This could result in an unaligned 32-bit read.  For example, if the cursor
 988  * is 24x24, then the first three bytes of 'image' contain the pixel data for
 989  * the top line of the cursor.  We do a 32-bit read of 'image', but we look
 990  * only at the top 24 bits.  Then we increment 'image' by 3 bytes.  The next
 991  * read is unaligned.  The only problem is that we might read past the end of
 992  * 'image' by 1-3 bytes, but that should not cause any problems.
 993  */
 994 static void fsl_diu_load_cursor_image(struct fb_info *info,
 995         const void *image, uint16_t bg, uint16_t fg,
 996         unsigned int width, unsigned int height)
 997 {
 998         struct mfb_info *mfbi = info->par;
 999         struct fsl_diu_data *data = mfbi->parent;
1000         __le16 *cursor = data->cursor;
1001         __le16 _fg = cpu_to_le16(fg);
1002         __le16 _bg = cpu_to_le16(bg);
1003         unsigned int h, w;
1004
1005         for (h = 0; h < height; h++) {
1006                 uint32_t mask = 1 << 31;
1007                 uint32_t line = be32_to_cpup(image);
1008
1009                 for (w = 0; w < width; w++) {
1010                         cursor[w] = (line & mask) ? _fg : _bg;
1011                         mask >>= 1;
1012                 }
1013
1014                 cursor += MAX_CURS;
1015                 image += DIV_ROUND_UP(width, 8);
1016         }
1017 }
1018
1019 /*
1020  * Set a hardware cursor.  The image data for the cursor is passed via the
1021  * fb_cursor object.
1022  */
1023 static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor)
1024 {
1025         struct mfb_info *mfbi = info->par;
1026         struct fsl_diu_data *data = mfbi->parent;
1027         struct diu __iomem *hw = data->diu_reg;
1028
1029         if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
1030                 return -EINVAL;
1031
1032         /* The cursor size has changed */
1033         if (cursor->set & FB_CUR_SETSIZE) {
1034                 /*
1035                  * The DIU cursor is a fixed size, so when we get this
1036                  * message, instead of resizing the cursor, we just clear
1037                  * all the image data, in expectation of new data.  However,
1038                  * in tests this control does not appear to be normally
1039                  * called.
1040                  */
1041                 memset(data->cursor, 0, sizeof(data->cursor));
1042         }
1043
1044         /* The cursor position has changed (cursor->image.dx|dy) */
1045         if (cursor->set & FB_CUR_SETPOS) {
1046                 uint32_t xx, yy;
1047
1048                 yy = (cursor->image.dy - info->var.yoffset) & 0x7ff;
1049                 xx = (cursor->image.dx - info->var.xoffset) & 0x7ff;
1050
1051                 out_be32(&hw->curs_pos, yy << 16 | xx);
1052         }
1053
1054         /*
1055          * FB_CUR_SETIMAGE - the cursor image has changed
1056          * FB_CUR_SETCMAP  - the cursor colors has changed
1057          * FB_CUR_SETSHAPE - the cursor bitmask has changed
1058          */
1059         if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
1060                 unsigned int image_size =
1061                         DIV_ROUND_UP(cursor->image.width, 8) * cursor->image.height;
1062                 unsigned int image_words =
1063                         DIV_ROUND_UP(image_size, sizeof(uint32_t));
1064                 unsigned int bg_idx = cursor->image.bg_color;
1065                 unsigned int fg_idx = cursor->image.fg_color;
1066                 uint8_t buffer[image_size];
1067                 uint32_t *image, *source, *mask;
1068                 uint16_t fg, bg;
1069                 unsigned int i;
1070
1071                 if (info->state != FBINFO_STATE_RUNNING)
1072                         return 0;
1073
1074                 /*
1075                  * Determine the size of the cursor image data.  Normally,
1076                  * it's 8x16.
1077                  */
1078                 image_size = DIV_ROUND_UP(cursor->image.width, 8) *
1079                         cursor->image.height;
1080
1081                 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1082                      ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1083                      ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1084                      1 << 15;
1085
1086                 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1087                      ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1088                      ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1089                      1 << 15;
1090
1091                 /* Use 32-bit operations on the data to improve performance */
1092                 image = (uint32_t *)buffer;
1093                 source = (uint32_t *)cursor->image.data;
1094                 mask = (uint32_t *)cursor->mask;
1095
1096                 if (cursor->rop == ROP_XOR)
1097                         for (i = 0; i < image_words; i++)
1098                                 image[i] = source[i] ^ mask[i];
1099                 else
1100                         for (i = 0; i < image_words; i++)
1101                                 image[i] = source[i] & mask[i];
1102
1103                 fsl_diu_load_cursor_image(info, image, bg, fg,
1104                         cursor->image.width, cursor->image.height);
1105         };
1106
1107         /*
1108          * Show or hide the cursor.  The cursor data is always stored in the
1109          * 'cursor' memory block, and the actual cursor position is always in
1110          * the DIU's CURS_POS register.  To hide the cursor, we redirect the
1111          * CURSOR register to a blank cursor.  The show the cursor, we
1112          * redirect the CURSOR register to the real cursor data.
1113          */
1114         if (cursor->enable)
1115                 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
1116         else
1117                 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
1118
1119         return 0;
1120 }
1121
1122 /*
1123  * Using the fb_var_screeninfo in fb_info we set the resolution of this
1124  * particular framebuffer. This function alters the fb_fix_screeninfo stored
1125  * in fb_info. It does not alter var in fb_info since we are using that
1126  * data. This means we depend on the data in var inside fb_info to be
1127  * supported by the hardware. fsl_diu_check_var is always called before
1128  * fsl_diu_set_par to ensure this.
1129  */
1130 static int fsl_diu_set_par(struct fb_info *info)
1131 {
1132         unsigned long len;
1133         struct fb_var_screeninfo *var = &info->var;
1134         struct mfb_info *mfbi = info->par;
1135         struct fsl_diu_data *data = mfbi->parent;
1136         struct diu_ad *ad = mfbi->ad;
1137         struct diu __iomem *hw;
1138
1139         hw = data->diu_reg;
1140
1141         set_fix(info);
1142
1143         len = info->var.yres_virtual * info->fix.line_length;
1144         /* Alloc & dealloc each time resolution/bpp change */
1145         if (len != info->fix.smem_len) {
1146                 if (info->fix.smem_start)
1147                         unmap_video_memory(info);
1148
1149                 /* Memory allocation for framebuffer */
1150                 if (map_video_memory(info)) {
1151                         dev_err(info->dev, "unable to allocate fb memory 1\n");
1152                         return -ENOMEM;
1153                 }
1154         }
1155
1156         if (diu_ops.get_pixel_format)
1157                 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1158                                                        var->bits_per_pixel);
1159         else
1160                 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1161
1162         ad->addr    = cpu_to_le32(info->fix.smem_start);
1163         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1164                                 var->xres_virtual) | mfbi->g_alpha;
1165         /* AOI should not be greater than display size */
1166         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
1167         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1168         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1169
1170         /* Disable chroma keying function */
1171         ad->ckmax_r = 0;
1172         ad->ckmax_g = 0;
1173         ad->ckmax_b = 0;
1174
1175         ad->ckmin_r = 255;
1176         ad->ckmin_g = 255;
1177         ad->ckmin_b = 255;
1178
1179         if (mfbi->index == PLANE0)
1180                 update_lcdc(info);
1181         return 0;
1182 }
1183
1184 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1185 {
1186         return ((val << width) + 0x7FFF - val) >> 16;
1187 }
1188
1189 /*
1190  * Set a single color register. The values supplied have a 16 bit magnitude
1191  * which needs to be scaled in this function for the hardware. Things to take
1192  * into consideration are how many color registers, if any, are supported with
1193  * the current color visual. With truecolor mode no color palettes are
1194  * supported. Here a pseudo palette is created which we store the value in
1195  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1196  * color palette.
1197  */
1198 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1199                              unsigned int green, unsigned int blue,
1200                              unsigned int transp, struct fb_info *info)
1201 {
1202         int ret = 1;
1203
1204         /*
1205          * If greyscale is true, then we convert the RGB value
1206          * to greyscale no matter what visual we are using.
1207          */
1208         if (info->var.grayscale)
1209                 red = green = blue = (19595 * red + 38470 * green +
1210                                       7471 * blue) >> 16;
1211         switch (info->fix.visual) {
1212         case FB_VISUAL_TRUECOLOR:
1213                 /*
1214                  * 16-bit True Colour.  We encode the RGB value
1215                  * according to the RGB bitfield information.
1216                  */
1217                 if (regno < 16) {
1218                         u32 *pal = info->pseudo_palette;
1219                         u32 v;
1220
1221                         red = CNVT_TOHW(red, info->var.red.length);
1222                         green = CNVT_TOHW(green, info->var.green.length);
1223                         blue = CNVT_TOHW(blue, info->var.blue.length);
1224                         transp = CNVT_TOHW(transp, info->var.transp.length);
1225
1226                         v = (red << info->var.red.offset) |
1227                             (green << info->var.green.offset) |
1228                             (blue << info->var.blue.offset) |
1229                             (transp << info->var.transp.offset);
1230
1231                         pal[regno] = v;
1232                         ret = 0;
1233                 }
1234                 break;
1235         }
1236
1237         return ret;
1238 }
1239
1240 /*
1241  * Pan (or wrap, depending on the `vmode' field) the display using the
1242  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1243  * don't fit, return -EINVAL.
1244  */
1245 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1246                              struct fb_info *info)
1247 {
1248         if ((info->var.xoffset == var->xoffset) &&
1249             (info->var.yoffset == var->yoffset))
1250                 return 0;       /* No change, do nothing */
1251
1252         if (var->xoffset < 0 || var->yoffset < 0
1253             || var->xoffset + info->var.xres > info->var.xres_virtual
1254             || var->yoffset + info->var.yres > info->var.yres_virtual)
1255                 return -EINVAL;
1256
1257         info->var.xoffset = var->xoffset;
1258         info->var.yoffset = var->yoffset;
1259
1260         if (var->vmode & FB_VMODE_YWRAP)
1261                 info->var.vmode |= FB_VMODE_YWRAP;
1262         else
1263                 info->var.vmode &= ~FB_VMODE_YWRAP;
1264
1265         fsl_diu_set_aoi(info);
1266
1267         return 0;
1268 }
1269
1270 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1271                        unsigned long arg)
1272 {
1273         struct mfb_info *mfbi = info->par;
1274         struct diu_ad *ad = mfbi->ad;
1275         struct mfb_chroma_key ck;
1276         unsigned char global_alpha;
1277         struct aoi_display_offset aoi_d;
1278         __u32 pix_fmt;
1279         void __user *buf = (void __user *)arg;
1280
1281         if (!arg)
1282                 return -EINVAL;
1283
1284         dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1285                 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1286                 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1287                 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1288
1289         switch (cmd) {
1290         case MFB_SET_PIXFMT_OLD:
1291                 dev_warn(info->dev,
1292                          "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1293                          MFB_SET_PIXFMT_OLD);
1294         case MFB_SET_PIXFMT:
1295                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1296                         return -EFAULT;
1297                 ad->pix_fmt = pix_fmt;
1298                 break;
1299         case MFB_GET_PIXFMT_OLD:
1300                 dev_warn(info->dev,
1301                          "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1302                          MFB_GET_PIXFMT_OLD);
1303         case MFB_GET_PIXFMT:
1304                 pix_fmt = ad->pix_fmt;
1305                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1306                         return -EFAULT;
1307                 break;
1308         case MFB_SET_AOID:
1309                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1310                         return -EFAULT;
1311                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1312                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1313                 fsl_diu_check_var(&info->var, info);
1314                 fsl_diu_set_aoi(info);
1315                 break;
1316         case MFB_GET_AOID:
1317                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1318                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1319                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1320                         return -EFAULT;
1321                 break;
1322         case MFB_GET_ALPHA:
1323                 global_alpha = mfbi->g_alpha;
1324                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1325                         return -EFAULT;
1326                 break;
1327         case MFB_SET_ALPHA:
1328                 /* set panel information */
1329                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1330                         return -EFAULT;
1331                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1332                                                         (global_alpha & 0xff);
1333                 mfbi->g_alpha = global_alpha;
1334                 break;
1335         case MFB_SET_CHROMA_KEY:
1336                 /* set panel winformation */
1337                 if (copy_from_user(&ck, buf, sizeof(ck)))
1338                         return -EFAULT;
1339
1340                 if (ck.enable &&
1341                    (ck.red_max < ck.red_min ||
1342                     ck.green_max < ck.green_min ||
1343                     ck.blue_max < ck.blue_min))
1344                         return -EINVAL;
1345
1346                 if (!ck.enable) {
1347                         ad->ckmax_r = 0;
1348                         ad->ckmax_g = 0;
1349                         ad->ckmax_b = 0;
1350                         ad->ckmin_r = 255;
1351                         ad->ckmin_g = 255;
1352                         ad->ckmin_b = 255;
1353                 } else {
1354                         ad->ckmax_r = ck.red_max;
1355                         ad->ckmax_g = ck.green_max;
1356                         ad->ckmax_b = ck.blue_max;
1357                         ad->ckmin_r = ck.red_min;
1358                         ad->ckmin_g = ck.green_min;
1359                         ad->ckmin_b = ck.blue_min;
1360                 }
1361                 break;
1362 #ifdef CONFIG_PPC_MPC512x
1363         case MFB_SET_GAMMA: {
1364                 struct fsl_diu_data *data = mfbi->parent;
1365
1366                 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1367                         return -EFAULT;
1368                 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1369                 break;
1370         }
1371         case MFB_GET_GAMMA: {
1372                 struct fsl_diu_data *data = mfbi->parent;
1373
1374                 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1375                         return -EFAULT;
1376                 break;
1377         }
1378 #endif
1379         default:
1380                 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1381                 return -ENOIOCTLCMD;
1382         }
1383
1384         return 0;
1385 }
1386
1387 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1388 {
1389         u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1390
1391         if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1392                 int_mask |= INT_VSYNC; /* enable vertical sync */
1393
1394         clrbits32(&data->diu_reg->int_mask, int_mask);
1395 }
1396
1397 /* turn on fb if count == 1
1398  */
1399 static int fsl_diu_open(struct fb_info *info, int user)
1400 {
1401         struct mfb_info *mfbi = info->par;
1402         int res = 0;
1403
1404         /* free boot splash memory on first /dev/fb0 open */
1405         if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1406                 diu_ops.release_bootmem();
1407
1408         spin_lock(&diu_lock);
1409         mfbi->count++;
1410         if (mfbi->count == 1) {
1411                 fsl_diu_check_var(&info->var, info);
1412                 res = fsl_diu_set_par(info);
1413                 if (res < 0)
1414                         mfbi->count--;
1415                 else {
1416                         fsl_diu_enable_interrupts(mfbi->parent);
1417                         fsl_diu_enable_panel(info);
1418                 }
1419         }
1420
1421         spin_unlock(&diu_lock);
1422         return res;
1423 }
1424
1425 /* turn off fb if count == 0
1426  */
1427 static int fsl_diu_release(struct fb_info *info, int user)
1428 {
1429         struct mfb_info *mfbi = info->par;
1430         int res = 0;
1431
1432         spin_lock(&diu_lock);
1433         mfbi->count--;
1434         if (mfbi->count == 0) {
1435                 struct fsl_diu_data *data = mfbi->parent;
1436                 bool disable = true;
1437                 int i;
1438
1439                 /* Disable interrupts only if all AOIs are closed */
1440                 for (i = 0; i < NUM_AOIS; i++) {
1441                         struct mfb_info *mi = data->fsl_diu_info[i].par;
1442
1443                         if (mi->count)
1444                                 disable = false;
1445                 }
1446                 if (disable)
1447                         out_be32(&data->diu_reg->int_mask, 0xffffffff);
1448                 fsl_diu_disable_panel(info);
1449         }
1450
1451         spin_unlock(&diu_lock);
1452         return res;
1453 }
1454
1455 static struct fb_ops fsl_diu_ops = {
1456         .owner = THIS_MODULE,
1457         .fb_check_var = fsl_diu_check_var,
1458         .fb_set_par = fsl_diu_set_par,
1459         .fb_setcolreg = fsl_diu_setcolreg,
1460         .fb_pan_display = fsl_diu_pan_display,
1461         .fb_fillrect = cfb_fillrect,
1462         .fb_copyarea = cfb_copyarea,
1463         .fb_imageblit = cfb_imageblit,
1464         .fb_ioctl = fsl_diu_ioctl,
1465         .fb_open = fsl_diu_open,
1466         .fb_release = fsl_diu_release,
1467         .fb_cursor = fsl_diu_cursor,
1468 };
1469
1470 static int install_fb(struct fb_info *info)
1471 {
1472         int rc;
1473         struct mfb_info *mfbi = info->par;
1474         struct fsl_diu_data *data = mfbi->parent;
1475         const char *aoi_mode, *init_aoi_mode = "320x240";
1476         struct fb_videomode *db = fsl_diu_mode_db;
1477         unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1478         int has_default_mode = 1;
1479
1480         info->var.activate = FB_ACTIVATE_NOW;
1481         info->fbops = &fsl_diu_ops;
1482         info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1483                 FBINFO_READS_FAST;
1484         info->pseudo_palette = mfbi->pseudo_palette;
1485
1486         rc = fb_alloc_cmap(&info->cmap, 16, 0);
1487         if (rc)
1488                 return rc;
1489
1490         if (mfbi->index == PLANE0) {
1491                 if (data->has_edid) {
1492                         /* Now build modedb from EDID */
1493                         fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1494                         fb_videomode_to_modelist(info->monspecs.modedb,
1495                                                  info->monspecs.modedb_len,
1496                                                  &info->modelist);
1497                         db = info->monspecs.modedb;
1498                         dbsize = info->monspecs.modedb_len;
1499                 }
1500                 aoi_mode = fb_mode;
1501         } else {
1502                 aoi_mode = init_aoi_mode;
1503         }
1504         rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1505                           default_bpp);
1506         if (!rc) {
1507                 /*
1508                  * For plane 0 we continue and look into
1509                  * driver's internal modedb.
1510                  */
1511                 if ((mfbi->index == PLANE0) && data->has_edid)
1512                         has_default_mode = 0;
1513                 else
1514                         return -EINVAL;
1515         }
1516
1517         if (!has_default_mode) {
1518                 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1519                         ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1520                 if (rc)
1521                         has_default_mode = 1;
1522         }
1523
1524         /* Still not found, use preferred mode from database if any */
1525         if (!has_default_mode && info->monspecs.modedb) {
1526                 struct fb_monspecs *specs = &info->monspecs;
1527                 struct fb_videomode *modedb = &specs->modedb[0];
1528
1529                 /*
1530                  * Get preferred timing. If not found,
1531                  * first mode in database will be used.
1532                  */
1533                 if (specs->misc & FB_MISC_1ST_DETAIL) {
1534                         int i;
1535
1536                         for (i = 0; i < specs->modedb_len; i++) {
1537                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1538                                         modedb = &specs->modedb[i];
1539                                         break;
1540                                 }
1541                         }
1542                 }
1543
1544                 info->var.bits_per_pixel = default_bpp;
1545                 fb_videomode_to_var(&info->var, modedb);
1546         }
1547
1548         if (fsl_diu_check_var(&info->var, info)) {
1549                 dev_err(info->dev, "fsl_diu_check_var failed\n");
1550                 unmap_video_memory(info);
1551                 fb_dealloc_cmap(&info->cmap);
1552                 return -EINVAL;
1553         }
1554
1555         if (register_framebuffer(info) < 0) {
1556                 dev_err(info->dev, "register_framebuffer failed\n");
1557                 unmap_video_memory(info);
1558                 fb_dealloc_cmap(&info->cmap);
1559                 return -EINVAL;
1560         }
1561
1562         mfbi->registered = 1;
1563         dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1564
1565         return 0;
1566 }
1567
1568 static void uninstall_fb(struct fb_info *info)
1569 {
1570         struct mfb_info *mfbi = info->par;
1571
1572         if (!mfbi->registered)
1573                 return;
1574
1575         unregister_framebuffer(info);
1576         unmap_video_memory(info);
1577         if (&info->cmap)
1578                 fb_dealloc_cmap(&info->cmap);
1579
1580         mfbi->registered = 0;
1581 }
1582
1583 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1584 {
1585         struct diu __iomem *hw = dev_id;
1586         uint32_t status = in_be32(&hw->int_status);
1587
1588         if (status) {
1589                 /* This is the workaround for underrun */
1590                 if (status & INT_UNDRUN) {
1591                         out_be32(&hw->diu_mode, 0);
1592                         udelay(1);
1593                         out_be32(&hw->diu_mode, 1);
1594                 }
1595 #if defined(CONFIG_NOT_COHERENT_CACHE)
1596                 else if (status & INT_VSYNC) {
1597                         unsigned int i;
1598
1599                         for (i = 0; i < coherence_data_size;
1600                                 i += d_cache_line_size)
1601                                 __asm__ __volatile__ (
1602                                         "dcbz 0, %[input]"
1603                                 ::[input]"r"(&coherence_data[i]));
1604                 }
1605 #endif
1606                 return IRQ_HANDLED;
1607         }
1608         return IRQ_NONE;
1609 }
1610
1611 #ifdef CONFIG_PM
1612 /*
1613  * Power management hooks. Note that we won't be called from IRQ context,
1614  * unlike the blank functions above, so we may sleep.
1615  */
1616 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1617 {
1618         struct fsl_diu_data *data;
1619
1620         data = dev_get_drvdata(&ofdev->dev);
1621         disable_lcdc(data->fsl_diu_info);
1622
1623         return 0;
1624 }
1625
1626 static int fsl_diu_resume(struct platform_device *ofdev)
1627 {
1628         struct fsl_diu_data *data;
1629
1630         data = dev_get_drvdata(&ofdev->dev);
1631         enable_lcdc(data->fsl_diu_info);
1632
1633         return 0;
1634 }
1635
1636 #else
1637 #define fsl_diu_suspend NULL
1638 #define fsl_diu_resume NULL
1639 #endif                          /* CONFIG_PM */
1640
1641 static ssize_t store_monitor(struct device *device,
1642         struct device_attribute *attr, const char *buf, size_t count)
1643 {
1644         enum fsl_diu_monitor_port old_monitor_port;
1645         struct fsl_diu_data *data =
1646                 container_of(attr, struct fsl_diu_data, dev_attr);
1647
1648         old_monitor_port = data->monitor_port;
1649         data->monitor_port = fsl_diu_name_to_port(buf);
1650
1651         if (old_monitor_port != data->monitor_port) {
1652                 /* All AOIs need adjust pixel format
1653                  * fsl_diu_set_par only change the pixsel format here
1654                  * unlikely to fail. */
1655                 unsigned int i;
1656
1657                 for (i=0; i < NUM_AOIS; i++)
1658                         fsl_diu_set_par(&data->fsl_diu_info[i]);
1659         }
1660         return count;
1661 }
1662
1663 static ssize_t show_monitor(struct device *device,
1664         struct device_attribute *attr, char *buf)
1665 {
1666         struct fsl_diu_data *data =
1667                 container_of(attr, struct fsl_diu_data, dev_attr);
1668
1669         switch (data->monitor_port) {
1670         case FSL_DIU_PORT_DVI:
1671                 return sprintf(buf, "DVI\n");
1672         case FSL_DIU_PORT_LVDS:
1673                 return sprintf(buf, "Single-link LVDS\n");
1674         case FSL_DIU_PORT_DLVDS:
1675                 return sprintf(buf, "Dual-link LVDS\n");
1676         }
1677
1678         return 0;
1679 }
1680
1681 static int fsl_diu_probe(struct platform_device *pdev)
1682 {
1683         struct device_node *np = pdev->dev.of_node;
1684         struct mfb_info *mfbi;
1685         struct fsl_diu_data *data;
1686         dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1687         const void *prop;
1688         unsigned int i;
1689         int ret;
1690
1691         data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1692                                    &dma_addr, GFP_DMA | __GFP_ZERO);
1693         if (!data)
1694                 return -ENOMEM;
1695         data->dma_addr = dma_addr;
1696
1697         /*
1698          * dma_alloc_coherent() uses a page allocator, so the address is
1699          * always page-aligned.  We need the memory to be 32-byte aligned,
1700          * so that's good.  However, if one day the allocator changes, we
1701          * need to catch that.  It's not worth the effort to handle unaligned
1702          * alloctions now because it's highly unlikely to ever be a problem.
1703          */
1704         if ((unsigned long)data & 31) {
1705                 dev_err(&pdev->dev, "misaligned allocation");
1706                 ret = -ENOMEM;
1707                 goto error;
1708         }
1709
1710         spin_lock_init(&data->reg_lock);
1711
1712         for (i = 0; i < NUM_AOIS; i++) {
1713                 struct fb_info *info = &data->fsl_diu_info[i];
1714
1715                 info->device = &pdev->dev;
1716                 info->par = &data->mfb[i];
1717
1718                 /*
1719                  * We store the physical address of the AD in the reserved
1720                  * 'paddr' field of the AD itself.
1721                  */
1722                 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1723
1724                 info->fix.smem_start = 0;
1725
1726                 /* Initialize the AOI data structure */
1727                 mfbi = info->par;
1728                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1729                 mfbi->parent = data;
1730                 mfbi->ad = &data->ad[i];
1731         }
1732
1733         /* Get the EDID data from the device tree, if present */
1734         prop = of_get_property(np, "edid", &ret);
1735         if (prop && ret == EDID_LENGTH) {
1736                 memcpy(data->edid_data, prop, EDID_LENGTH);
1737                 data->has_edid = true;
1738         }
1739
1740         data->diu_reg = of_iomap(np, 0);
1741         if (!data->diu_reg) {
1742                 dev_err(&pdev->dev, "cannot map DIU registers\n");
1743                 ret = -EFAULT;
1744                 goto error;
1745         }
1746
1747         /* Get the IRQ of the DIU */
1748         data->irq = irq_of_parse_and_map(np, 0);
1749
1750         if (!data->irq) {
1751                 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1752                 ret = -EINVAL;
1753                 goto error;
1754         }
1755         data->monitor_port = monitor_port;
1756
1757         /* Initialize the dummy Area Descriptor */
1758         data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1759         data->dummy_ad.pix_fmt = 0x88882317;
1760         data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1761         data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) |  2);
1762         data->dummy_ad.offset_xyi = 0;
1763         data->dummy_ad.offset_xyd = 0;
1764         data->dummy_ad.next_ad = 0;
1765         data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1766
1767         /*
1768          * Let DIU continue to display splash screen if it was pre-initialized
1769          * by the bootloader; otherwise, clear the display.
1770          */
1771         if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1772                 out_be32(&data->diu_reg->desc[0], 0);
1773
1774         out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1775         out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1776
1777         /*
1778          * Older versions of U-Boot leave interrupts enabled, so disable
1779          * all of them and clear the status register.
1780          */
1781         out_be32(&data->diu_reg->int_mask, 0xffffffff);
1782         in_be32(&data->diu_reg->int_status);
1783
1784         ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1785                           data->diu_reg);
1786         if (ret) {
1787                 dev_err(&pdev->dev, "could not claim irq\n");
1788                 goto error;
1789         }
1790
1791         for (i = 0; i < NUM_AOIS; i++) {
1792                 ret = install_fb(&data->fsl_diu_info[i]);
1793                 if (ret) {
1794                         dev_err(&pdev->dev, "could not register fb %d\n", i);
1795                         free_irq(data->irq, data->diu_reg);
1796                         goto error;
1797                 }
1798         }
1799
1800         sysfs_attr_init(&data->dev_attr.attr);
1801         data->dev_attr.attr.name = "monitor";
1802         data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1803         data->dev_attr.show = show_monitor;
1804         data->dev_attr.store = store_monitor;
1805         ret = device_create_file(&pdev->dev, &data->dev_attr);
1806         if (ret) {
1807                 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1808                         data->dev_attr.attr.name);
1809         }
1810
1811         dev_set_drvdata(&pdev->dev, data);
1812         return 0;
1813
1814 error:
1815         for (i = 0; i < NUM_AOIS; i++)
1816                 uninstall_fb(&data->fsl_diu_info[i]);
1817
1818         iounmap(data->diu_reg);
1819
1820         return ret;
1821 }
1822
1823 static int fsl_diu_remove(struct platform_device *pdev)
1824 {
1825         struct fsl_diu_data *data;
1826         int i;
1827
1828         data = dev_get_drvdata(&pdev->dev);
1829         disable_lcdc(&data->fsl_diu_info[0]);
1830
1831         free_irq(data->irq, data->diu_reg);
1832
1833         for (i = 0; i < NUM_AOIS; i++)
1834                 uninstall_fb(&data->fsl_diu_info[i]);
1835
1836         iounmap(data->diu_reg);
1837
1838         return 0;
1839 }
1840
1841 #ifndef MODULE
1842 static int __init fsl_diu_setup(char *options)
1843 {
1844         char *opt;
1845         unsigned long val;
1846
1847         if (!options || !*options)
1848                 return 0;
1849
1850         while ((opt = strsep(&options, ",")) != NULL) {
1851                 if (!*opt)
1852                         continue;
1853                 if (!strncmp(opt, "monitor=", 8)) {
1854                         monitor_port = fsl_diu_name_to_port(opt + 8);
1855                 } else if (!strncmp(opt, "bpp=", 4)) {
1856                         if (!kstrtoul(opt + 4, 10, &val))
1857                                 default_bpp = val;
1858                 } else
1859                         fb_mode = opt;
1860         }
1861
1862         return 0;
1863 }
1864 #endif
1865
1866 static struct of_device_id fsl_diu_match[] = {
1867 #ifdef CONFIG_PPC_MPC512x
1868         {
1869                 .compatible = "fsl,mpc5121-diu",
1870         },
1871 #endif
1872         {
1873                 .compatible = "fsl,diu",
1874         },
1875         {}
1876 };
1877 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1878
1879 static struct platform_driver fsl_diu_driver = {
1880         .driver = {
1881                 .name = "fsl-diu-fb",
1882                 .owner = THIS_MODULE,
1883                 .of_match_table = fsl_diu_match,
1884         },
1885         .probe          = fsl_diu_probe,
1886         .remove         = fsl_diu_remove,
1887         .suspend        = fsl_diu_suspend,
1888         .resume         = fsl_diu_resume,
1889 };
1890
1891 static int __init fsl_diu_init(void)
1892 {
1893 #ifdef CONFIG_NOT_COHERENT_CACHE
1894         struct device_node *np;
1895         const u32 *prop;
1896 #endif
1897         int ret;
1898 #ifndef MODULE
1899         char *option;
1900
1901         /*
1902          * For kernel boot options (in 'video=xxxfb:<options>' format)
1903          */
1904         if (fb_get_options("fslfb", &option))
1905                 return -ENODEV;
1906         fsl_diu_setup(option);
1907 #else
1908         monitor_port = fsl_diu_name_to_port(monitor_string);
1909 #endif
1910         pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1911
1912 #ifdef CONFIG_NOT_COHERENT_CACHE
1913         np = of_find_node_by_type(NULL, "cpu");
1914         if (!np) {
1915                 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1916                 return -ENODEV;
1917         }
1918
1919         prop = of_get_property(np, "d-cache-size", NULL);
1920         if (prop == NULL) {
1921                 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1922                        "in 'cpu' node\n");
1923                 of_node_put(np);
1924                 return -ENODEV;
1925         }
1926
1927         /*
1928          * Freescale PLRU requires 13/8 times the cache size to do a proper
1929          * displacement flush
1930          */
1931         coherence_data_size = be32_to_cpup(prop) * 13;
1932         coherence_data_size /= 8;
1933
1934         pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1935                  coherence_data_size);
1936
1937         prop = of_get_property(np, "d-cache-line-size", NULL);
1938         if (prop == NULL) {
1939                 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1940                        "in 'cpu' node\n");
1941                 of_node_put(np);
1942                 return -ENODEV;
1943         }
1944         d_cache_line_size = be32_to_cpup(prop);
1945
1946         pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1947                  d_cache_line_size);
1948
1949         of_node_put(np);
1950         coherence_data = vmalloc(coherence_data_size);
1951         if (!coherence_data) {
1952                 pr_err("fsl-diu-fb: could not allocate coherence data "
1953                        "(size=%zu)\n", coherence_data_size);
1954                 return -ENOMEM;
1955         }
1956
1957 #endif
1958
1959         ret = platform_driver_register(&fsl_diu_driver);
1960         if (ret) {
1961                 pr_err("fsl-diu-fb: failed to register platform driver\n");
1962 #if defined(CONFIG_NOT_COHERENT_CACHE)
1963                 vfree(coherence_data);
1964 #endif
1965         }
1966         return ret;
1967 }
1968
1969 static void __exit fsl_diu_exit(void)
1970 {
1971         platform_driver_unregister(&fsl_diu_driver);
1972 #if defined(CONFIG_NOT_COHERENT_CACHE)
1973         vfree(coherence_data);
1974 #endif
1975 }
1976
1977 module_init(fsl_diu_init);
1978 module_exit(fsl_diu_exit);
1979
1980 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1981 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1982 MODULE_LICENSE("GPL");
1983
1984 module_param_named(mode, fb_mode, charp, 0);
1985 MODULE_PARM_DESC(mode,
1986         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1987 module_param_named(bpp, default_bpp, ulong, 0);
1988 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1989 module_param_named(monitor, monitor_string, charp, 0);
1990 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1991         "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1992