drivers/video/fbdev/fsl-diu-fb.c

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This source file includes following definitions.
fsl_diu_dump
fsl_diu_name_to_port
wr_reg_wa
fsl_diu_enable_panel
fsl_diu_disable_panel
enable_lcdc
disable_lcdc
adjust_aoi_size_position
fsl_diu_check_var
set_fix
update_lcdc
map_video_memory
unmap_video_memory
fsl_diu_set_aoi
fsl_diu_get_pixel_format
fsl_diu_load_cursor_image
fsl_diu_cursor
fsl_diu_set_par
CNVT_TOHW
fsl_diu_setcolreg
fsl_diu_pan_display
fsl_diu_ioctl
fsl_diu_enable_interrupts
fsl_diu_open
fsl_diu_release
install_fb
uninstall_fb
fsl_diu_isr
fsl_diu_suspend
fsl_diu_resume
store_monitor
show_monitor
fsl_diu_probe
fsl_diu_remove
fsl_diu_setup
fsl_diu_init
fsl_diu_exit
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
   4  *
   5  *  Freescale DIU Frame Buffer device driver
   6  *
   7  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
   8  *           Paul Widmer <paul.widmer@freescale.com>
   9  *           Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
  10  *           York Sun <yorksun@freescale.com>
  11  *
  12  *   Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
  13  */
  14 
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/string.h>
  19 #include <linux/slab.h>
  20 #include <linux/fb.h>
  21 #include <linux/init.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/clk.h>
  26 #include <linux/uaccess.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/of_address.h>
  30 #include <linux/of_irq.h>
  31 
  32 #include <sysdev/fsl_soc.h>
  33 #include <linux/fsl-diu-fb.h>
  34 #include "edid.h"
  35 
  36 #define NUM_AOIS        5       /* 1 for plane 0, 2 for planes 1 & 2 each */
  37 
  38 /* HW cursor parameters */
  39 #define MAX_CURS                32
  40 
  41 /* INT_STATUS/INT_MASK field descriptions */
  42 #define INT_VSYNC       0x01    /* Vsync interrupt  */
  43 #define INT_VSYNC_WB    0x02    /* Vsync interrupt for write back operation */
  44 #define INT_UNDRUN      0x04    /* Under run exception interrupt */
  45 #define INT_PARERR      0x08    /* Display parameters error interrupt */
  46 #define INT_LS_BF_VS    0x10    /* Lines before vsync. interrupt */
  47 
  48 /*
  49  * List of supported video modes
  50  *
  51  * The first entry is the default video mode.  The remain entries are in
  52  * order if increasing resolution and frequency.  The 320x240-60 mode is
  53  * the initial AOI for the second and third planes.
  54  */
  55 static struct fb_videomode fsl_diu_mode_db[] = {
  56         {
  57                 .refresh        = 60,
  58                 .xres           = 1024,
  59                 .yres           = 768,
  60                 .pixclock       = 15385,
  61                 .left_margin    = 160,
  62                 .right_margin   = 24,
  63                 .upper_margin   = 29,
  64                 .lower_margin   = 3,
  65                 .hsync_len      = 136,
  66                 .vsync_len      = 6,
  67                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  68                 .vmode          = FB_VMODE_NONINTERLACED
  69         },
  70         {
  71                 .refresh        = 60,
  72                 .xres           = 320,
  73                 .yres           = 240,
  74                 .pixclock       = 79440,
  75                 .left_margin    = 16,
  76                 .right_margin   = 16,
  77                 .upper_margin   = 16,
  78                 .lower_margin   = 5,
  79                 .hsync_len      = 48,
  80                 .vsync_len      = 1,
  81                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  82                 .vmode          = FB_VMODE_NONINTERLACED
  83         },
  84         {
  85                 .refresh        = 60,
  86                 .xres           = 640,
  87                 .yres           = 480,
  88                 .pixclock       = 39722,
  89                 .left_margin    = 48,
  90                 .right_margin   = 16,
  91                 .upper_margin   = 33,
  92                 .lower_margin   = 10,
  93                 .hsync_len      = 96,
  94                 .vsync_len      = 2,
  95                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  96                 .vmode          = FB_VMODE_NONINTERLACED
  97         },
  98         {
  99                 .refresh        = 72,
 100                 .xres           = 640,
 101                 .yres           = 480,
 102                 .pixclock       = 32052,
 103                 .left_margin    = 128,
 104                 .right_margin   = 24,
 105                 .upper_margin   = 28,
 106                 .lower_margin   = 9,
 107                 .hsync_len      = 40,
 108                 .vsync_len      = 3,
 109                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 110                 .vmode          = FB_VMODE_NONINTERLACED
 111         },
 112         {
 113                 .refresh        = 75,
 114                 .xres           = 640,
 115                 .yres           = 480,
 116                 .pixclock       = 31747,
 117                 .left_margin    = 120,
 118                 .right_margin   = 16,
 119                 .upper_margin   = 16,
 120                 .lower_margin   = 1,
 121                 .hsync_len      = 64,
 122                 .vsync_len      = 3,
 123                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 124                 .vmode          = FB_VMODE_NONINTERLACED
 125         },
 126         {
 127                 .refresh        = 90,
 128                 .xres           = 640,
 129                 .yres           = 480,
 130                 .pixclock       = 25057,
 131                 .left_margin    = 120,
 132                 .right_margin   = 32,
 133                 .upper_margin   = 14,
 134                 .lower_margin   = 25,
 135                 .hsync_len      = 40,
 136                 .vsync_len      = 14,
 137                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 138                 .vmode          = FB_VMODE_NONINTERLACED
 139         },
 140         {
 141                 .refresh        = 100,
 142                 .xres           = 640,
 143                 .yres           = 480,
 144                 .pixclock       = 22272,
 145                 .left_margin    = 48,
 146                 .right_margin   = 32,
 147                 .upper_margin   = 17,
 148                 .lower_margin   = 22,
 149                 .hsync_len      = 128,
 150                 .vsync_len      = 12,
 151                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 152                 .vmode          = FB_VMODE_NONINTERLACED
 153         },
 154         {
 155                 .refresh        = 60,
 156                 .xres           = 800,
 157                 .yres           = 480,
 158                 .pixclock       = 33805,
 159                 .left_margin    = 96,
 160                 .right_margin   = 24,
 161                 .upper_margin   = 10,
 162                 .lower_margin   = 3,
 163                 .hsync_len      = 72,
 164                 .vsync_len      = 7,
 165                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 166                 .vmode          = FB_VMODE_NONINTERLACED
 167         },
 168         {
 169                 .refresh        = 60,
 170                 .xres           = 800,
 171                 .yres           = 600,
 172                 .pixclock       = 25000,
 173                 .left_margin    = 88,
 174                 .right_margin   = 40,
 175                 .upper_margin   = 23,
 176                 .lower_margin   = 1,
 177                 .hsync_len      = 128,
 178                 .vsync_len      = 4,
 179                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 180                 .vmode          = FB_VMODE_NONINTERLACED
 181         },
 182         {
 183                 .refresh        = 60,
 184                 .xres           = 854,
 185                 .yres           = 480,
 186                 .pixclock       = 31518,
 187                 .left_margin    = 104,
 188                 .right_margin   = 16,
 189                 .upper_margin   = 13,
 190                 .lower_margin   = 1,
 191                 .hsync_len      = 88,
 192                 .vsync_len      = 3,
 193                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 194                 .vmode          = FB_VMODE_NONINTERLACED
 195         },
 196         {
 197                 .refresh        = 70,
 198                 .xres           = 1024,
 199                 .yres           = 768,
 200                 .pixclock       = 16886,
 201                 .left_margin    = 3,
 202                 .right_margin   = 3,
 203                 .upper_margin   = 2,
 204                 .lower_margin   = 2,
 205                 .hsync_len      = 40,
 206                 .vsync_len      = 18,
 207                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 208                 .vmode          = FB_VMODE_NONINTERLACED
 209         },
 210         {
 211                 .refresh        = 75,
 212                 .xres           = 1024,
 213                 .yres           = 768,
 214                 .pixclock       = 15009,
 215                 .left_margin    = 3,
 216                 .right_margin   = 3,
 217                 .upper_margin   = 2,
 218                 .lower_margin   = 2,
 219                 .hsync_len      = 80,
 220                 .vsync_len      = 32,
 221                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 222                 .vmode          = FB_VMODE_NONINTERLACED
 223         },
 224         {
 225                 .refresh        = 60,
 226                 .xres           = 1280,
 227                 .yres           = 480,
 228                 .pixclock       = 18939,
 229                 .left_margin    = 353,
 230                 .right_margin   = 47,
 231                 .upper_margin   = 39,
 232                 .lower_margin   = 4,
 233                 .hsync_len      = 8,
 234                 .vsync_len      = 2,
 235                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 236                 .vmode          = FB_VMODE_NONINTERLACED
 237         },
 238         {
 239                 .refresh        = 60,
 240                 .xres           = 1280,
 241                 .yres           = 720,
 242                 .pixclock       = 13426,
 243                 .left_margin    = 192,
 244                 .right_margin   = 64,
 245                 .upper_margin   = 22,
 246                 .lower_margin   = 1,
 247                 .hsync_len      = 136,
 248                 .vsync_len      = 3,
 249                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 250                 .vmode          = FB_VMODE_NONINTERLACED
 251         },
 252         {
 253                 .refresh        = 60,
 254                 .xres           = 1280,
 255                 .yres           = 1024,
 256                 .pixclock       = 9375,
 257                 .left_margin    = 38,
 258                 .right_margin   = 128,
 259                 .upper_margin   = 2,
 260                 .lower_margin   = 7,
 261                 .hsync_len      = 216,
 262                 .vsync_len      = 37,
 263                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 264                 .vmode          = FB_VMODE_NONINTERLACED
 265         },
 266         {
 267                 .refresh        = 70,
 268                 .xres           = 1280,
 269                 .yres           = 1024,
 270                 .pixclock       = 9380,
 271                 .left_margin    = 6,
 272                 .right_margin   = 6,
 273                 .upper_margin   = 4,
 274                 .lower_margin   = 4,
 275                 .hsync_len      = 60,
 276                 .vsync_len      = 94,
 277                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 278                 .vmode          = FB_VMODE_NONINTERLACED
 279         },
 280         {
 281                 .refresh        = 75,
 282                 .xres           = 1280,
 283                 .yres           = 1024,
 284                 .pixclock       = 9380,
 285                 .left_margin    = 6,
 286                 .right_margin   = 6,
 287                 .upper_margin   = 4,
 288                 .lower_margin   = 4,
 289                 .hsync_len      = 60,
 290                 .vsync_len      = 15,
 291                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 292                 .vmode          = FB_VMODE_NONINTERLACED
 293         },
 294         {
 295                 .refresh        = 60,
 296                 .xres           = 1920,
 297                 .yres           = 1080,
 298                 .pixclock       = 5787,
 299                 .left_margin    = 328,
 300                 .right_margin   = 120,
 301                 .upper_margin   = 34,
 302                 .lower_margin   = 1,
 303                 .hsync_len      = 208,
 304                 .vsync_len      = 3,
 305                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 306                 .vmode          = FB_VMODE_NONINTERLACED
 307         },
 308 };
 309 
 310 static char *fb_mode;
 311 static unsigned long default_bpp = 32;
 312 static enum fsl_diu_monitor_port monitor_port;
 313 static char *monitor_string;
 314 
 315 #if defined(CONFIG_NOT_COHERENT_CACHE)
 316 static u8 *coherence_data;
 317 static size_t coherence_data_size;
 318 static unsigned int d_cache_line_size;
 319 #endif
 320 
 321 static DEFINE_SPINLOCK(diu_lock);
 322 
 323 enum mfb_index {
 324         PLANE0 = 0,     /* Plane 0, only one AOI that fills the screen */
 325         PLANE1_AOI0,    /* Plane 1, first AOI */
 326         PLANE1_AOI1,    /* Plane 1, second AOI */
 327         PLANE2_AOI0,    /* Plane 2, first AOI */
 328         PLANE2_AOI1,    /* Plane 2, second AOI */
 329 };
 330 
 331 struct mfb_info {
 332         enum mfb_index index;
 333         char *id;
 334         int registered;
 335         unsigned long pseudo_palette[16];
 336         struct diu_ad *ad;
 337         unsigned char g_alpha;
 338         unsigned int count;
 339         int x_aoi_d;            /* aoi display x offset to physical screen */
 340         int y_aoi_d;            /* aoi display y offset to physical screen */
 341         struct fsl_diu_data *parent;
 342 };
 343 
 344 /**
 345  * struct fsl_diu_data - per-DIU data structure
 346  * @dma_addr: DMA address of this structure
 347  * @fsl_diu_info: fb_info objects, one per AOI
 348  * @dev_attr: sysfs structure
 349  * @irq: IRQ
 350  * @monitor_port: the monitor port this DIU is connected to
 351  * @diu_reg: pointer to the DIU hardware registers
 352  * @reg_lock: spinlock for register access
 353  * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
 354  * dummy_ad: DIU Area Descriptor for the dummy AOI
 355  * @ad[]: Area Descriptors for each real AOI
 356  * @gamma: gamma color table
 357  * @cursor: hardware cursor data
 358  * @blank_cursor: blank cursor for hiding cursor
 359  * @next_cursor: scratch space to build load cursor
 360  * @edid_data: EDID information buffer
 361  * @has_edid: whether or not the EDID buffer is valid
 362  *
 363  * This data structure must be allocated with 32-byte alignment, so that the
 364  * internal fields can be aligned properly.
 365  */
 366 struct fsl_diu_data {
 367         dma_addr_t dma_addr;
 368         struct fb_info fsl_diu_info[NUM_AOIS];
 369         struct mfb_info mfb[NUM_AOIS];
 370         struct device_attribute dev_attr;
 371         unsigned int irq;
 372         enum fsl_diu_monitor_port monitor_port;
 373         struct diu __iomem *diu_reg;
 374         spinlock_t reg_lock;
 375         u8 dummy_aoi[4 * 4 * 4];
 376         struct diu_ad dummy_ad __aligned(8);
 377         struct diu_ad ad[NUM_AOIS] __aligned(8);
 378         u8 gamma[256 * 3] __aligned(32);
 379         /* It's easier to parse the cursor data as little-endian */
 380         __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
 381         /* Blank cursor data -- used to hide the cursor */
 382         __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
 383         /* Scratch cursor data -- used to build new cursor */
 384         __le16 next_cursor[MAX_CURS * MAX_CURS] __aligned(32);
 385         uint8_t edid_data[EDID_LENGTH];
 386         bool has_edid;
 387 } __aligned(32);
 388 
 389 /* Determine the DMA address of a member of the fsl_diu_data structure */
 390 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
 391 
 392 static const struct mfb_info mfb_template[] = {
 393         {
 394                 .index = PLANE0,
 395                 .id = "Panel0",
 396                 .registered = 0,
 397                 .count = 0,
 398                 .x_aoi_d = 0,
 399                 .y_aoi_d = 0,
 400         },
 401         {
 402                 .index = PLANE1_AOI0,
 403                 .id = "Panel1 AOI0",
 404                 .registered = 0,
 405                 .g_alpha = 0xff,
 406                 .count = 0,
 407                 .x_aoi_d = 0,
 408                 .y_aoi_d = 0,
 409         },
 410         {
 411                 .index = PLANE1_AOI1,
 412                 .id = "Panel1 AOI1",
 413                 .registered = 0,
 414                 .g_alpha = 0xff,
 415                 .count = 0,
 416                 .x_aoi_d = 0,
 417                 .y_aoi_d = 480,
 418         },
 419         {
 420                 .index = PLANE2_AOI0,
 421                 .id = "Panel2 AOI0",
 422                 .registered = 0,
 423                 .g_alpha = 0xff,
 424                 .count = 0,
 425                 .x_aoi_d = 640,
 426                 .y_aoi_d = 0,
 427         },
 428         {
 429                 .index = PLANE2_AOI1,
 430                 .id = "Panel2 AOI1",
 431                 .registered = 0,
 432                 .g_alpha = 0xff,
 433                 .count = 0,
 434                 .x_aoi_d = 640,
 435                 .y_aoi_d = 480,
 436         },
 437 };
 438 
 439 #ifdef DEBUG
 440 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
 441 {
 442         mb();
 443         pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x palette=%08x "
 444                  "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
 445                  "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
 446                  "thresholds=%08x int_mask=%08x plut=%08x\n",
 447                  hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
 448                  hw->palette, hw->cursor, hw->curs_pos, hw->diu_mode,
 449                  hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
 450                  hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
 451         rmb();
 452 }
 453 #endif
 454 
 455 /**
 456  * fsl_diu_name_to_port - convert a port name to a monitor port enum
 457  *
 458  * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
 459  * the enum fsl_diu_monitor_port that corresponds to that string.
 460  *
 461  * For compatibility with older versions, a number ("0", "1", or "2") is also
 462  * supported.
 463  *
 464  * If the string is unknown, DVI is assumed.
 465  *
 466  * If the particular port is not supported by the platform, another port
 467  * (platform-specific) is chosen instead.
 468  */
 469 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
 470 {
 471         enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
 472         unsigned long val;
 473 
 474         if (s) {
 475                 if (!kstrtoul(s, 10, &val) && (val <= 2))
 476                         port = (enum fsl_diu_monitor_port) val;
 477                 else if (strncmp(s, "lvds", 4) == 0)
 478                         port = FSL_DIU_PORT_LVDS;
 479                 else if (strncmp(s, "dlvds", 5) == 0)
 480                         port = FSL_DIU_PORT_DLVDS;
 481         }
 482 
 483         if (diu_ops.valid_monitor_port)
 484                 port = diu_ops.valid_monitor_port(port);
 485 
 486         return port;
 487 }
 488 
 489 /*
 490  * Workaround for failed writing desc register of planes.
 491  * Needed with MPC5121 DIU rev 2.0 silicon.
 492  */
 493 void wr_reg_wa(u32 *reg, u32 val)
 494 {
 495         do {
 496                 out_be32(reg, val);
 497         } while (in_be32(reg) != val);
 498 }
 499 
 500 static void fsl_diu_enable_panel(struct fb_info *info)
 501 {
 502         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 503         struct diu_ad *ad = mfbi->ad;
 504         struct fsl_diu_data *data = mfbi->parent;
 505         struct diu __iomem *hw = data->diu_reg;
 506 
 507         switch (mfbi->index) {
 508         case PLANE0:
 509                 wr_reg_wa(&hw->desc[0], ad->paddr);
 510                 break;
 511         case PLANE1_AOI0:
 512                 cmfbi = &data->mfb[2];
 513                 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
 514                         if (cmfbi->count > 0)   /* AOI1 open */
 515                                 ad->next_ad =
 516                                         cpu_to_le32(cmfbi->ad->paddr);
 517                         else
 518                                 ad->next_ad = 0;
 519                         wr_reg_wa(&hw->desc[1], ad->paddr);
 520                 }
 521                 break;
 522         case PLANE2_AOI0:
 523                 cmfbi = &data->mfb[4];
 524                 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
 525                         if (cmfbi->count > 0)   /* AOI1 open */
 526                                 ad->next_ad =
 527                                         cpu_to_le32(cmfbi->ad->paddr);
 528                         else
 529                                 ad->next_ad = 0;
 530                         wr_reg_wa(&hw->desc[2], ad->paddr);
 531                 }
 532                 break;
 533         case PLANE1_AOI1:
 534                 pmfbi = &data->mfb[1];
 535                 ad->next_ad = 0;
 536                 if (hw->desc[1] == data->dummy_ad.paddr)
 537                         wr_reg_wa(&hw->desc[1], ad->paddr);
 538                 else                                    /* AOI0 open */
 539                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 540                 break;
 541         case PLANE2_AOI1:
 542                 pmfbi = &data->mfb[3];
 543                 ad->next_ad = 0;
 544                 if (hw->desc[2] == data->dummy_ad.paddr)
 545                         wr_reg_wa(&hw->desc[2], ad->paddr);
 546                 else                            /* AOI0 was open */
 547                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 548                 break;
 549         }
 550 }
 551 
 552 static void fsl_diu_disable_panel(struct fb_info *info)
 553 {
 554         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 555         struct diu_ad *ad = mfbi->ad;
 556         struct fsl_diu_data *data = mfbi->parent;
 557         struct diu __iomem *hw = data->diu_reg;
 558 
 559         switch (mfbi->index) {
 560         case PLANE0:
 561                 wr_reg_wa(&hw->desc[0], 0);
 562                 break;
 563         case PLANE1_AOI0:
 564                 cmfbi = &data->mfb[2];
 565                 if (cmfbi->count > 0)   /* AOI1 is open */
 566                         wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
 567                                         /* move AOI1 to the first */
 568                 else                    /* AOI1 was closed */
 569                         wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
 570                                         /* close AOI 0 */
 571                 break;
 572         case PLANE2_AOI0:
 573                 cmfbi = &data->mfb[4];
 574                 if (cmfbi->count > 0)   /* AOI1 is open */
 575                         wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
 576                                         /* move AOI1 to the first */
 577                 else                    /* AOI1 was closed */
 578                         wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
 579                                         /* close AOI 0 */
 580                 break;
 581         case PLANE1_AOI1:
 582                 pmfbi = &data->mfb[1];
 583                 if (hw->desc[1] != ad->paddr) {
 584                                 /* AOI1 is not the first in the chain */
 585                         if (pmfbi->count > 0)
 586                                         /* AOI0 is open, must be the first */
 587                                 pmfbi->ad->next_ad = 0;
 588                 } else                  /* AOI1 is the first in the chain */
 589                         wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
 590                                         /* close AOI 1 */
 591                 break;
 592         case PLANE2_AOI1:
 593                 pmfbi = &data->mfb[3];
 594                 if (hw->desc[2] != ad->paddr) {
 595                                 /* AOI1 is not the first in the chain */
 596                         if (pmfbi->count > 0)
 597                                 /* AOI0 is open, must be the first */
 598                                 pmfbi->ad->next_ad = 0;
 599                 } else          /* AOI1 is the first in the chain */
 600                         wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
 601                                 /* close AOI 1 */
 602                 break;
 603         }
 604 }
 605 
 606 static void enable_lcdc(struct fb_info *info)
 607 {
 608         struct mfb_info *mfbi = info->par;
 609         struct fsl_diu_data *data = mfbi->parent;
 610         struct diu __iomem *hw = data->diu_reg;
 611 
 612         out_be32(&hw->diu_mode, MFB_MODE1);
 613 }
 614 
 615 static void disable_lcdc(struct fb_info *info)
 616 {
 617         struct mfb_info *mfbi = info->par;
 618         struct fsl_diu_data *data = mfbi->parent;
 619         struct diu __iomem *hw = data->diu_reg;
 620 
 621         out_be32(&hw->diu_mode, 0);
 622 }
 623 
 624 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 625                                 struct fb_info *info)
 626 {
 627         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
 628         struct fsl_diu_data *data = mfbi->parent;
 629         int available_height, upper_aoi_bottom;
 630         enum mfb_index index = mfbi->index;
 631         int lower_aoi_is_open, upper_aoi_is_open;
 632         __u32 base_plane_width, base_plane_height, upper_aoi_height;
 633 
 634         base_plane_width = data->fsl_diu_info[0].var.xres;
 635         base_plane_height = data->fsl_diu_info[0].var.yres;
 636 
 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         switch (index) {
 642         case PLANE0:
 643                 if (mfbi->x_aoi_d != 0)
 644                         mfbi->x_aoi_d = 0;
 645                 if (mfbi->y_aoi_d != 0)
 646                         mfbi->y_aoi_d = 0;
 647                 break;
 648         case PLANE1_AOI0:
 649         case PLANE2_AOI0:
 650                 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
 651                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
 652                 if (var->xres > base_plane_width)
 653                         var->xres = base_plane_width;
 654                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 655                         mfbi->x_aoi_d = base_plane_width - var->xres;
 656 
 657                 if (lower_aoi_is_open)
 658                         available_height = lower_aoi_mfbi->y_aoi_d;
 659                 else
 660                         available_height = base_plane_height;
 661                 if (var->yres > available_height)
 662                         var->yres = available_height;
 663                 if ((mfbi->y_aoi_d + var->yres) > available_height)
 664                         mfbi->y_aoi_d = available_height - var->yres;
 665                 break;
 666         case PLANE1_AOI1:
 667         case PLANE2_AOI1:
 668                 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
 669                 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
 670                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
 671                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
 672                 if (var->xres > base_plane_width)
 673                         var->xres = base_plane_width;
 674                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 675                         mfbi->x_aoi_d = base_plane_width - var->xres;
 676                 if (mfbi->y_aoi_d < 0)
 677                         mfbi->y_aoi_d = 0;
 678                 if (upper_aoi_is_open) {
 679                         if (mfbi->y_aoi_d < upper_aoi_bottom)
 680                                 mfbi->y_aoi_d = upper_aoi_bottom;
 681                         available_height = base_plane_height
 682                                                 - upper_aoi_bottom;
 683                 } else
 684                         available_height = base_plane_height;
 685                 if (var->yres > available_height)
 686                         var->yres = available_height;
 687                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
 688                         mfbi->y_aoi_d = base_plane_height - var->yres;
 689                 break;
 690         }
 691 }
 692 /*
 693  * Checks to see if the hardware supports the state requested by var passed
 694  * in. This function does not alter the hardware state! If the var passed in
 695  * is slightly off by what the hardware can support then we alter the var
 696  * PASSED in to what we can do. If the hardware doesn't support mode change
 697  * a -EINVAL will be returned by the upper layers.
 698  */
 699 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 700                                 struct fb_info *info)
 701 {
 702         if (var->xres_virtual < var->xres)
 703                 var->xres_virtual = var->xres;
 704         if (var->yres_virtual < var->yres)
 705                 var->yres_virtual = var->yres;
 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                 /*
1061                  * Determine the size of the cursor image data.  Normally,
1062                  * it's 8x16.
1063                  */
1064                 unsigned int image_size =
1065                         DIV_ROUND_UP(cursor->image.width, 8) *
1066                         cursor->image.height;
1067                 unsigned int image_words =
1068                         DIV_ROUND_UP(image_size, sizeof(uint32_t));
1069                 unsigned int bg_idx = cursor->image.bg_color;
1070                 unsigned int fg_idx = cursor->image.fg_color;
1071                 uint32_t *image, *source, *mask;
1072                 uint16_t fg, bg;
1073                 unsigned int i;
1074 
1075                 if (info->state != FBINFO_STATE_RUNNING)
1076                         return 0;
1077 
1078                 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1079                      ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1080                      ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1081                      1 << 15;
1082 
1083                 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1084                      ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1085                      ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1086                      1 << 15;
1087 
1088                 /* Use 32-bit operations on the data to improve performance */
1089                 image = (uint32_t *)data->next_cursor;
1090                 source = (uint32_t *)cursor->image.data;
1091                 mask = (uint32_t *)cursor->mask;
1092 
1093                 if (cursor->rop == ROP_XOR)
1094                         for (i = 0; i < image_words; i++)
1095                                 image[i] = source[i] ^ mask[i];
1096                 else
1097                         for (i = 0; i < image_words; i++)
1098                                 image[i] = source[i] & mask[i];
1099 
1100                 fsl_diu_load_cursor_image(info, image, bg, fg,
1101                         cursor->image.width, cursor->image.height);
1102         }
1103 
1104         /*
1105          * Show or hide the cursor.  The cursor data is always stored in the
1106          * 'cursor' memory block, and the actual cursor position is always in
1107          * the DIU's CURS_POS register.  To hide the cursor, we redirect the
1108          * CURSOR register to a blank cursor.  The show the cursor, we
1109          * redirect the CURSOR register to the real cursor data.
1110          */
1111         if (cursor->enable)
1112                 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
1113         else
1114                 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
1115 
1116         return 0;
1117 }
1118 
1119 /*
1120  * Using the fb_var_screeninfo in fb_info we set the resolution of this
1121  * particular framebuffer. This function alters the fb_fix_screeninfo stored
1122  * in fb_info. It does not alter var in fb_info since we are using that
1123  * data. This means we depend on the data in var inside fb_info to be
1124  * supported by the hardware. fsl_diu_check_var is always called before
1125  * fsl_diu_set_par to ensure this.
1126  */
1127 static int fsl_diu_set_par(struct fb_info *info)
1128 {
1129         unsigned long len;
1130         struct fb_var_screeninfo *var = &info->var;
1131         struct mfb_info *mfbi = info->par;
1132         struct fsl_diu_data *data = mfbi->parent;
1133         struct diu_ad *ad = mfbi->ad;
1134         struct diu __iomem *hw;
1135 
1136         hw = data->diu_reg;
1137 
1138         set_fix(info);
1139 
1140         len = info->var.yres_virtual * info->fix.line_length;
1141         /* Alloc & dealloc each time resolution/bpp change */
1142         if (len != info->fix.smem_len) {
1143                 if (info->fix.smem_start)
1144                         unmap_video_memory(info);
1145 
1146                 /* Memory allocation for framebuffer */
1147                 if (map_video_memory(info)) {
1148                         dev_err(info->dev, "unable to allocate fb memory 1\n");
1149                         return -ENOMEM;
1150                 }
1151         }
1152 
1153         if (diu_ops.get_pixel_format)
1154                 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1155                                                        var->bits_per_pixel);
1156         else
1157                 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1158 
1159         ad->addr    = cpu_to_le32(info->fix.smem_start);
1160         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1161                                 var->xres_virtual) | mfbi->g_alpha;
1162         /* AOI should not be greater than display size */
1163         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
1164         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1165         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1166 
1167         /* Disable chroma keying function */
1168         ad->ckmax_r = 0;
1169         ad->ckmax_g = 0;
1170         ad->ckmax_b = 0;
1171 
1172         ad->ckmin_r = 255;
1173         ad->ckmin_g = 255;
1174         ad->ckmin_b = 255;
1175 
1176         if (mfbi->index == PLANE0)
1177                 update_lcdc(info);
1178         return 0;
1179 }
1180 
1181 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1182 {
1183         return ((val << width) + 0x7FFF - val) >> 16;
1184 }
1185 
1186 /*
1187  * Set a single color register. The values supplied have a 16 bit magnitude
1188  * which needs to be scaled in this function for the hardware. Things to take
1189  * into consideration are how many color registers, if any, are supported with
1190  * the current color visual. With truecolor mode no color palettes are
1191  * supported. Here a pseudo palette is created which we store the value in
1192  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1193  * color palette.
1194  */
1195 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1196                              unsigned int green, unsigned int blue,
1197                              unsigned int transp, struct fb_info *info)
1198 {
1199         int ret = 1;
1200 
1201         /*
1202          * If greyscale is true, then we convert the RGB value
1203          * to greyscale no matter what visual we are using.
1204          */
1205         if (info->var.grayscale)
1206                 red = green = blue = (19595 * red + 38470 * green +
1207                                       7471 * blue) >> 16;
1208         switch (info->fix.visual) {
1209         case FB_VISUAL_TRUECOLOR:
1210                 /*
1211                  * 16-bit True Colour.  We encode the RGB value
1212                  * according to the RGB bitfield information.
1213                  */
1214                 if (regno < 16) {
1215                         u32 *pal = info->pseudo_palette;
1216                         u32 v;
1217 
1218                         red = CNVT_TOHW(red, info->var.red.length);
1219                         green = CNVT_TOHW(green, info->var.green.length);
1220                         blue = CNVT_TOHW(blue, info->var.blue.length);
1221                         transp = CNVT_TOHW(transp, info->var.transp.length);
1222 
1223                         v = (red << info->var.red.offset) |
1224                             (green << info->var.green.offset) |
1225                             (blue << info->var.blue.offset) |
1226                             (transp << info->var.transp.offset);
1227 
1228                         pal[regno] = v;
1229                         ret = 0;
1230                 }
1231                 break;
1232         }
1233 
1234         return ret;
1235 }
1236 
1237 /*
1238  * Pan (or wrap, depending on the `vmode' field) the display using the
1239  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1240  * don't fit, return -EINVAL.
1241  */
1242 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1243                              struct fb_info *info)
1244 {
1245         if ((info->var.xoffset == var->xoffset) &&
1246             (info->var.yoffset == var->yoffset))
1247                 return 0;       /* No change, do nothing */
1248 
1249         if (var->xoffset + info->var.xres > info->var.xres_virtual
1250             || var->yoffset + info->var.yres > info->var.yres_virtual)
1251                 return -EINVAL;
1252 
1253         info->var.xoffset = var->xoffset;
1254         info->var.yoffset = var->yoffset;
1255 
1256         if (var->vmode & FB_VMODE_YWRAP)
1257                 info->var.vmode |= FB_VMODE_YWRAP;
1258         else
1259                 info->var.vmode &= ~FB_VMODE_YWRAP;
1260 
1261         fsl_diu_set_aoi(info);
1262 
1263         return 0;
1264 }
1265 
1266 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1267                        unsigned long arg)
1268 {
1269         struct mfb_info *mfbi = info->par;
1270         struct diu_ad *ad = mfbi->ad;
1271         struct mfb_chroma_key ck;
1272         unsigned char global_alpha;
1273         struct aoi_display_offset aoi_d;
1274         __u32 pix_fmt;
1275         void __user *buf = (void __user *)arg;
1276 
1277         if (!arg)
1278                 return -EINVAL;
1279 
1280         dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1281                 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1282                 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1283                 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1284 
1285         switch (cmd) {
1286         case MFB_SET_PIXFMT_OLD:
1287                 dev_warn(info->dev,
1288                          "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1289                          MFB_SET_PIXFMT_OLD);
1290         case MFB_SET_PIXFMT:
1291                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1292                         return -EFAULT;
1293                 ad->pix_fmt = pix_fmt;
1294                 break;
1295         case MFB_GET_PIXFMT_OLD:
1296                 dev_warn(info->dev,
1297                          "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1298                          MFB_GET_PIXFMT_OLD);
1299         case MFB_GET_PIXFMT:
1300                 pix_fmt = ad->pix_fmt;
1301                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1302                         return -EFAULT;
1303                 break;
1304         case MFB_SET_AOID:
1305                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1306                         return -EFAULT;
1307                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1308                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1309                 fsl_diu_check_var(&info->var, info);
1310                 fsl_diu_set_aoi(info);
1311                 break;
1312         case MFB_GET_AOID:
1313                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1314                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1315                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1316                         return -EFAULT;
1317                 break;
1318         case MFB_GET_ALPHA:
1319                 global_alpha = mfbi->g_alpha;
1320                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1321                         return -EFAULT;
1322                 break;
1323         case MFB_SET_ALPHA:
1324                 /* set panel information */
1325                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1326                         return -EFAULT;
1327                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1328                                                         (global_alpha & 0xff);
1329                 mfbi->g_alpha = global_alpha;
1330                 break;
1331         case MFB_SET_CHROMA_KEY:
1332                 /* set panel winformation */
1333                 if (copy_from_user(&ck, buf, sizeof(ck)))
1334                         return -EFAULT;
1335 
1336                 if (ck.enable &&
1337                    (ck.red_max < ck.red_min ||
1338                     ck.green_max < ck.green_min ||
1339                     ck.blue_max < ck.blue_min))
1340                         return -EINVAL;
1341 
1342                 if (!ck.enable) {
1343                         ad->ckmax_r = 0;
1344                         ad->ckmax_g = 0;
1345                         ad->ckmax_b = 0;
1346                         ad->ckmin_r = 255;
1347                         ad->ckmin_g = 255;
1348                         ad->ckmin_b = 255;
1349                 } else {
1350                         ad->ckmax_r = ck.red_max;
1351                         ad->ckmax_g = ck.green_max;
1352                         ad->ckmax_b = ck.blue_max;
1353                         ad->ckmin_r = ck.red_min;
1354                         ad->ckmin_g = ck.green_min;
1355                         ad->ckmin_b = ck.blue_min;
1356                 }
1357                 break;
1358 #ifdef CONFIG_PPC_MPC512x
1359         case MFB_SET_GAMMA: {
1360                 struct fsl_diu_data *data = mfbi->parent;
1361 
1362                 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1363                         return -EFAULT;
1364                 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1365                 break;
1366         }
1367         case MFB_GET_GAMMA: {
1368                 struct fsl_diu_data *data = mfbi->parent;
1369 
1370                 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1371                         return -EFAULT;
1372                 break;
1373         }
1374 #endif
1375         default:
1376                 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1377                 return -ENOIOCTLCMD;
1378         }
1379 
1380         return 0;
1381 }
1382 
1383 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1384 {
1385         u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1386 
1387         if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1388                 int_mask |= INT_VSYNC; /* enable vertical sync */
1389 
1390         clrbits32(&data->diu_reg->int_mask, int_mask);
1391 }
1392 
1393 /* turn on fb if count == 1
1394  */
1395 static int fsl_diu_open(struct fb_info *info, int user)
1396 {
1397         struct mfb_info *mfbi = info->par;
1398         int res = 0;
1399 
1400         /* free boot splash memory on first /dev/fb0 open */
1401         if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1402                 diu_ops.release_bootmem();
1403 
1404         spin_lock(&diu_lock);
1405         mfbi->count++;
1406         if (mfbi->count == 1) {
1407                 fsl_diu_check_var(&info->var, info);
1408                 res = fsl_diu_set_par(info);
1409                 if (res < 0)
1410                         mfbi->count--;
1411                 else {
1412                         fsl_diu_enable_interrupts(mfbi->parent);
1413                         fsl_diu_enable_panel(info);
1414                 }
1415         }
1416 
1417         spin_unlock(&diu_lock);
1418         return res;
1419 }
1420 
1421 /* turn off fb if count == 0
1422  */
1423 static int fsl_diu_release(struct fb_info *info, int user)
1424 {
1425         struct mfb_info *mfbi = info->par;
1426         int res = 0;
1427 
1428         spin_lock(&diu_lock);
1429         mfbi->count--;
1430         if (mfbi->count == 0) {
1431                 struct fsl_diu_data *data = mfbi->parent;
1432                 bool disable = true;
1433                 int i;
1434 
1435                 /* Disable interrupts only if all AOIs are closed */
1436                 for (i = 0; i < NUM_AOIS; i++) {
1437                         struct mfb_info *mi = data->fsl_diu_info[i].par;
1438 
1439                         if (mi->count)
1440                                 disable = false;
1441                 }
1442                 if (disable)
1443                         out_be32(&data->diu_reg->int_mask, 0xffffffff);
1444                 fsl_diu_disable_panel(info);
1445         }
1446 
1447         spin_unlock(&diu_lock);
1448         return res;
1449 }
1450 
1451 static struct fb_ops fsl_diu_ops = {
1452         .owner = THIS_MODULE,
1453         .fb_check_var = fsl_diu_check_var,
1454         .fb_set_par = fsl_diu_set_par,
1455         .fb_setcolreg = fsl_diu_setcolreg,
1456         .fb_pan_display = fsl_diu_pan_display,
1457         .fb_fillrect = cfb_fillrect,
1458         .fb_copyarea = cfb_copyarea,
1459         .fb_imageblit = cfb_imageblit,
1460         .fb_ioctl = fsl_diu_ioctl,
1461         .fb_open = fsl_diu_open,
1462         .fb_release = fsl_diu_release,
1463         .fb_cursor = fsl_diu_cursor,
1464 };
1465 
1466 static int install_fb(struct fb_info *info)
1467 {
1468         int rc;
1469         struct mfb_info *mfbi = info->par;
1470         struct fsl_diu_data *data = mfbi->parent;
1471         const char *aoi_mode, *init_aoi_mode = "320x240";
1472         struct fb_videomode *db = fsl_diu_mode_db;
1473         unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1474         int has_default_mode = 1;
1475 
1476         info->var.activate = FB_ACTIVATE_NOW;
1477         info->fbops = &fsl_diu_ops;
1478         info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1479                 FBINFO_READS_FAST;
1480         info->pseudo_palette = mfbi->pseudo_palette;
1481 
1482         rc = fb_alloc_cmap(&info->cmap, 16, 0);
1483         if (rc)
1484                 return rc;
1485 
1486         if (mfbi->index == PLANE0) {
1487                 if (data->has_edid) {
1488                         /* Now build modedb from EDID */
1489                         fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1490                         fb_videomode_to_modelist(info->monspecs.modedb,
1491                                                  info->monspecs.modedb_len,
1492                                                  &info->modelist);
1493                         db = info->monspecs.modedb;
1494                         dbsize = info->monspecs.modedb_len;
1495                 }
1496                 aoi_mode = fb_mode;
1497         } else {
1498                 aoi_mode = init_aoi_mode;
1499         }
1500         rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1501                           default_bpp);
1502         if (!rc) {
1503                 /*
1504                  * For plane 0 we continue and look into
1505                  * driver's internal modedb.
1506                  */
1507                 if ((mfbi->index == PLANE0) && data->has_edid)
1508                         has_default_mode = 0;
1509                 else
1510                         return -EINVAL;
1511         }
1512 
1513         if (!has_default_mode) {
1514                 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1515                         ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1516                 if (rc)
1517                         has_default_mode = 1;
1518         }
1519 
1520         /* Still not found, use preferred mode from database if any */
1521         if (!has_default_mode && info->monspecs.modedb) {
1522                 struct fb_monspecs *specs = &info->monspecs;
1523                 struct fb_videomode *modedb = &specs->modedb[0];
1524 
1525                 /*
1526                  * Get preferred timing. If not found,
1527                  * first mode in database will be used.
1528                  */
1529                 if (specs->misc & FB_MISC_1ST_DETAIL) {
1530                         int i;
1531 
1532                         for (i = 0; i < specs->modedb_len; i++) {
1533                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1534                                         modedb = &specs->modedb[i];
1535                                         break;
1536                                 }
1537                         }
1538                 }
1539 
1540                 info->var.bits_per_pixel = default_bpp;
1541                 fb_videomode_to_var(&info->var, modedb);
1542         }
1543 
1544         if (fsl_diu_check_var(&info->var, info)) {
1545                 dev_err(info->dev, "fsl_diu_check_var failed\n");
1546                 unmap_video_memory(info);
1547                 fb_dealloc_cmap(&info->cmap);
1548                 return -EINVAL;
1549         }
1550 
1551         if (register_framebuffer(info) < 0) {
1552                 dev_err(info->dev, "register_framebuffer failed\n");
1553                 unmap_video_memory(info);
1554                 fb_dealloc_cmap(&info->cmap);
1555                 return -EINVAL;
1556         }
1557 
1558         mfbi->registered = 1;
1559         dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1560 
1561         return 0;
1562 }
1563 
1564 static void uninstall_fb(struct fb_info *info)
1565 {
1566         struct mfb_info *mfbi = info->par;
1567 
1568         if (!mfbi->registered)
1569                 return;
1570 
1571         unregister_framebuffer(info);
1572         unmap_video_memory(info);
1573         fb_dealloc_cmap(&info->cmap);
1574 
1575         mfbi->registered = 0;
1576 }
1577 
1578 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1579 {
1580         struct diu __iomem *hw = dev_id;
1581         uint32_t status = in_be32(&hw->int_status);
1582 
1583         if (status) {
1584                 /* This is the workaround for underrun */
1585                 if (status & INT_UNDRUN) {
1586                         out_be32(&hw->diu_mode, 0);
1587                         udelay(1);
1588                         out_be32(&hw->diu_mode, 1);
1589                 }
1590 #if defined(CONFIG_NOT_COHERENT_CACHE)
1591                 else if (status & INT_VSYNC) {
1592                         unsigned int i;
1593 
1594                         for (i = 0; i < coherence_data_size;
1595                                 i += d_cache_line_size)
1596                                 __asm__ __volatile__ (
1597                                         "dcbz 0, %[input]"
1598                                 ::[input]"r"(&coherence_data[i]));
1599                 }
1600 #endif
1601                 return IRQ_HANDLED;
1602         }
1603         return IRQ_NONE;
1604 }
1605 
1606 #ifdef CONFIG_PM
1607 /*
1608  * Power management hooks. Note that we won't be called from IRQ context,
1609  * unlike the blank functions above, so we may sleep.
1610  */
1611 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1612 {
1613         struct fsl_diu_data *data;
1614 
1615         data = dev_get_drvdata(&ofdev->dev);
1616         disable_lcdc(data->fsl_diu_info);
1617 
1618         return 0;
1619 }
1620 
1621 static int fsl_diu_resume(struct platform_device *ofdev)
1622 {
1623         struct fsl_diu_data *data;
1624         unsigned int i;
1625 
1626         data = dev_get_drvdata(&ofdev->dev);
1627 
1628         fsl_diu_enable_interrupts(data);
1629         update_lcdc(data->fsl_diu_info);
1630         for (i = 0; i < NUM_AOIS; i++) {
1631                 if (data->mfb[i].count)
1632                         fsl_diu_enable_panel(&data->fsl_diu_info[i]);
1633         }
1634 
1635         return 0;
1636 }
1637 
1638 #else
1639 #define fsl_diu_suspend NULL
1640 #define fsl_diu_resume NULL
1641 #endif                          /* CONFIG_PM */
1642 
1643 static ssize_t store_monitor(struct device *device,
1644         struct device_attribute *attr, const char *buf, size_t count)
1645 {
1646         enum fsl_diu_monitor_port old_monitor_port;
1647         struct fsl_diu_data *data =
1648                 container_of(attr, struct fsl_diu_data, dev_attr);
1649 
1650         old_monitor_port = data->monitor_port;
1651         data->monitor_port = fsl_diu_name_to_port(buf);
1652 
1653         if (old_monitor_port != data->monitor_port) {
1654                 /* All AOIs need adjust pixel format
1655                  * fsl_diu_set_par only change the pixsel format here
1656                  * unlikely to fail. */
1657                 unsigned int i;
1658 
1659                 for (i=0; i < NUM_AOIS; i++)
1660                         fsl_diu_set_par(&data->fsl_diu_info[i]);
1661         }
1662         return count;
1663 }
1664 
1665 static ssize_t show_monitor(struct device *device,
1666         struct device_attribute *attr, char *buf)
1667 {
1668         struct fsl_diu_data *data =
1669                 container_of(attr, struct fsl_diu_data, dev_attr);
1670 
1671         switch (data->monitor_port) {
1672         case FSL_DIU_PORT_DVI:
1673                 return sprintf(buf, "DVI\n");
1674         case FSL_DIU_PORT_LVDS:
1675                 return sprintf(buf, "Single-link LVDS\n");
1676         case FSL_DIU_PORT_DLVDS:
1677                 return sprintf(buf, "Dual-link LVDS\n");
1678         }
1679 
1680         return 0;
1681 }
1682 
1683 static int fsl_diu_probe(struct platform_device *pdev)
1684 {
1685         struct device_node *np = pdev->dev.of_node;
1686         struct mfb_info *mfbi;
1687         struct fsl_diu_data *data;
1688         dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1689         const void *prop;
1690         unsigned int i;
1691         int ret;
1692 
1693         data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1694                                    &dma_addr, GFP_DMA | __GFP_ZERO);
1695         if (!data)
1696                 return -ENOMEM;
1697         data->dma_addr = dma_addr;
1698 
1699         /*
1700          * dma_alloc_coherent() uses a page allocator, so the address is
1701          * always page-aligned.  We need the memory to be 32-byte aligned,
1702          * so that's good.  However, if one day the allocator changes, we
1703          * need to catch that.  It's not worth the effort to handle unaligned
1704          * alloctions now because it's highly unlikely to ever be a problem.
1705          */
1706         if ((unsigned long)data & 31) {
1707                 dev_err(&pdev->dev, "misaligned allocation");
1708                 ret = -ENOMEM;
1709                 goto error;
1710         }
1711 
1712         spin_lock_init(&data->reg_lock);
1713 
1714         for (i = 0; i < NUM_AOIS; i++) {
1715                 struct fb_info *info = &data->fsl_diu_info[i];
1716 
1717                 info->device = &pdev->dev;
1718                 info->par = &data->mfb[i];
1719 
1720                 /*
1721                  * We store the physical address of the AD in the reserved
1722                  * 'paddr' field of the AD itself.
1723                  */
1724                 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1725 
1726                 info->fix.smem_start = 0;
1727 
1728                 /* Initialize the AOI data structure */
1729                 mfbi = info->par;
1730                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1731                 mfbi->parent = data;
1732                 mfbi->ad = &data->ad[i];
1733         }
1734 
1735         /* Get the EDID data from the device tree, if present */
1736         prop = of_get_property(np, "edid", &ret);
1737         if (prop && ret == EDID_LENGTH) {
1738                 memcpy(data->edid_data, prop, EDID_LENGTH);
1739                 data->has_edid = true;
1740         }
1741 
1742         data->diu_reg = of_iomap(np, 0);
1743         if (!data->diu_reg) {
1744                 dev_err(&pdev->dev, "cannot map DIU registers\n");
1745                 ret = -EFAULT;
1746                 goto error;
1747         }
1748 
1749         /* Get the IRQ of the DIU */
1750         data->irq = irq_of_parse_and_map(np, 0);
1751 
1752         if (!data->irq) {
1753                 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1754                 ret = -EINVAL;
1755                 goto error;
1756         }
1757         data->monitor_port = monitor_port;
1758 
1759         /* Initialize the dummy Area Descriptor */
1760         data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1761         data->dummy_ad.pix_fmt = 0x88882317;
1762         data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1763         data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) |  2);
1764         data->dummy_ad.offset_xyi = 0;
1765         data->dummy_ad.offset_xyd = 0;
1766         data->dummy_ad.next_ad = 0;
1767         data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1768 
1769         /*
1770          * Let DIU continue to display splash screen if it was pre-initialized
1771          * by the bootloader; otherwise, clear the display.
1772          */
1773         if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1774                 out_be32(&data->diu_reg->desc[0], 0);
1775 
1776         out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1777         out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1778 
1779         /*
1780          * Older versions of U-Boot leave interrupts enabled, so disable
1781          * all of them and clear the status register.
1782          */
1783         out_be32(&data->diu_reg->int_mask, 0xffffffff);
1784         in_be32(&data->diu_reg->int_status);
1785 
1786         ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1787                           data->diu_reg);
1788         if (ret) {
1789                 dev_err(&pdev->dev, "could not claim irq\n");
1790                 goto error;
1791         }
1792 
1793         for (i = 0; i < NUM_AOIS; i++) {
1794                 ret = install_fb(&data->fsl_diu_info[i]);
1795                 if (ret) {
1796                         dev_err(&pdev->dev, "could not register fb %d\n", i);
1797                         free_irq(data->irq, data->diu_reg);
1798                         goto error;
1799                 }
1800         }
1801 
1802         sysfs_attr_init(&data->dev_attr.attr);
1803         data->dev_attr.attr.name = "monitor";
1804         data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1805         data->dev_attr.show = show_monitor;
1806         data->dev_attr.store = store_monitor;
1807         ret = device_create_file(&pdev->dev, &data->dev_attr);
1808         if (ret) {
1809                 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1810                         data->dev_attr.attr.name);
1811         }
1812 
1813         dev_set_drvdata(&pdev->dev, data);
1814         return 0;
1815 
1816 error:
1817         for (i = 0; i < NUM_AOIS; i++)
1818                 uninstall_fb(&data->fsl_diu_info[i]);
1819 
1820         iounmap(data->diu_reg);
1821 
1822         return ret;
1823 }
1824 
1825 static int fsl_diu_remove(struct platform_device *pdev)
1826 {
1827         struct fsl_diu_data *data;
1828         int i;
1829 
1830         data = dev_get_drvdata(&pdev->dev);
1831         disable_lcdc(&data->fsl_diu_info[0]);
1832 
1833         free_irq(data->irq, data->diu_reg);
1834 
1835         for (i = 0; i < NUM_AOIS; i++)
1836                 uninstall_fb(&data->fsl_diu_info[i]);
1837 
1838         iounmap(data->diu_reg);
1839 
1840         return 0;
1841 }
1842 
1843 #ifndef MODULE
1844 static int __init fsl_diu_setup(char *options)
1845 {
1846         char *opt;
1847         unsigned long val;
1848 
1849         if (!options || !*options)
1850                 return 0;
1851 
1852         while ((opt = strsep(&options, ",")) != NULL) {
1853                 if (!*opt)
1854                         continue;
1855                 if (!strncmp(opt, "monitor=", 8)) {
1856                         monitor_port = fsl_diu_name_to_port(opt + 8);
1857                 } else if (!strncmp(opt, "bpp=", 4)) {
1858                         if (!kstrtoul(opt + 4, 10, &val))
1859                                 default_bpp = val;
1860                 } else
1861                         fb_mode = opt;
1862         }
1863 
1864         return 0;
1865 }
1866 #endif
1867 
1868 static const struct of_device_id fsl_diu_match[] = {
1869 #ifdef CONFIG_PPC_MPC512x
1870         {
1871                 .compatible = "fsl,mpc5121-diu",
1872         },
1873 #endif
1874         {
1875                 .compatible = "fsl,diu",
1876         },
1877         {}
1878 };
1879 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1880 
1881 static struct platform_driver fsl_diu_driver = {
1882         .driver = {
1883                 .name = "fsl-diu-fb",
1884                 .of_match_table = fsl_diu_match,
1885         },
1886         .probe          = fsl_diu_probe,
1887         .remove         = fsl_diu_remove,
1888         .suspend        = fsl_diu_suspend,
1889         .resume         = fsl_diu_resume,
1890 };
1891 
1892 static int __init fsl_diu_init(void)
1893 {
1894 #ifdef CONFIG_NOT_COHERENT_CACHE
1895         struct device_node *np;
1896         const u32 *prop;
1897 #endif
1898         int ret;
1899 #ifndef MODULE
1900         char *option;
1901 
1902         /*
1903          * For kernel boot options (in 'video=xxxfb:<options>' format)
1904          */
1905         if (fb_get_options("fslfb", &option))
1906                 return -ENODEV;
1907         fsl_diu_setup(option);
1908 #else
1909         monitor_port = fsl_diu_name_to_port(monitor_string);
1910 #endif
1911 
1912         /*
1913          * Must to verify set_pixel_clock. If not implement on platform,
1914          * then that means that there is no platform support for the DIU.
1915          */
1916         if (!diu_ops.set_pixel_clock)
1917                 return -ENODEV;
1918 
1919         pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1920 
1921 #ifdef CONFIG_NOT_COHERENT_CACHE
1922         np = of_get_cpu_node(0, NULL);
1923         if (!np) {
1924                 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1925                 return -ENODEV;
1926         }
1927 
1928         prop = of_get_property(np, "d-cache-size", NULL);
1929         if (prop == NULL) {
1930                 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1931                        "in 'cpu' node\n");
1932                 of_node_put(np);
1933                 return -ENODEV;
1934         }
1935 
1936         /*
1937          * Freescale PLRU requires 13/8 times the cache size to do a proper
1938          * displacement flush
1939          */
1940         coherence_data_size = be32_to_cpup(prop) * 13;
1941         coherence_data_size /= 8;
1942 
1943         pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1944                  coherence_data_size);
1945 
1946         prop = of_get_property(np, "d-cache-line-size", NULL);
1947         if (prop == NULL) {
1948                 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1949                        "in 'cpu' node\n");
1950                 of_node_put(np);
1951                 return -ENODEV;
1952         }
1953         d_cache_line_size = be32_to_cpup(prop);
1954 
1955         pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1956                  d_cache_line_size);
1957 
1958         of_node_put(np);
1959         coherence_data = vmalloc(coherence_data_size);
1960         if (!coherence_data)
1961                 return -ENOMEM;
1962 #endif
1963 
1964         ret = platform_driver_register(&fsl_diu_driver);
1965         if (ret) {
1966                 pr_err("fsl-diu-fb: failed to register platform driver\n");
1967 #if defined(CONFIG_NOT_COHERENT_CACHE)
1968                 vfree(coherence_data);
1969 #endif
1970         }
1971         return ret;
1972 }
1973 
1974 static void __exit fsl_diu_exit(void)
1975 {
1976         platform_driver_unregister(&fsl_diu_driver);
1977 #if defined(CONFIG_NOT_COHERENT_CACHE)
1978         vfree(coherence_data);
1979 #endif
1980 }
1981 
1982 module_init(fsl_diu_init);
1983 module_exit(fsl_diu_exit);
1984 
1985 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1986 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1987 MODULE_LICENSE("GPL");
1988 
1989 module_param_named(mode, fb_mode, charp, 0);
1990 MODULE_PARM_DESC(mode,
1991         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1992 module_param_named(bpp, default_bpp, ulong, 0);
1993 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1994 module_param_named(monitor, monitor_string, charp, 0);
1995 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1996         "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1997
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/video/fbdev/fsl-diu-fb.c

DEFINITIONS
