drivers/video/fbdev/omap/omapfb_main.c

   1 /*
   2  * Framebuffer driver for TI OMAP boards
   3  *
   4  * Copyright (C) 2004 Nokia Corporation
   5  * Author: Imre Deak <imre.deak@nokia.com>
   6  *
   7  * Acknowledgements:
   8  *   Alex McMains <aam@ridgerun.com>       - Original driver
   9  *   Juha Yrjola <juha.yrjola@nokia.com>   - Original driver and improvements
  10  *   Dirk Behme <dirk.behme@de.bosch.com>  - changes for 2.6 kernel API
  11  *   Texas Instruments                     - H3 support
  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  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * with this program; if not, write to the Free Software Foundation, Inc.,
  25  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  */
  27 #include <linux/platform_device.h>
  28 #include <linux/mm.h>
  29 #include <linux/slab.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/module.h>
  32
  33 #include <linux/omap-dma.h>
  34
  35 #include <mach/hardware.h>
  36
  37 #include "omapfb.h"
  38 #include "lcdc.h"
  39
  40 #define MODULE_NAME     "omapfb"
  41
  42 static unsigned int     def_accel;
  43 static unsigned long    def_vram[OMAPFB_PLANE_NUM];
  44 static unsigned int     def_vram_cnt;
  45 static unsigned long    def_vxres;
  46 static unsigned long    def_vyres;
  47 static unsigned int     def_rotate;
  48 static unsigned int     def_mirror;
  49
  50 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
  51 static bool             manual_update = 1;
  52 #else
  53 static bool             manual_update;
  54 #endif
  55
  56 static struct platform_device   *fbdev_pdev;
  57 static struct lcd_panel         *fbdev_panel;
  58 static struct omapfb_device     *omapfb_dev;
  59
  60 struct caps_table_struct {
  61         unsigned long flag;
  62         const char *name;
  63 };
  64
  65 static struct caps_table_struct ctrl_caps[] = {
  66         { OMAPFB_CAPS_MANUAL_UPDATE,  "manual update" },
  67         { OMAPFB_CAPS_TEARSYNC,       "tearing synchronization" },
  68         { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
  69         { OMAPFB_CAPS_PLANE_SCALE,    "scale plane" },
  70         { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
  71         { OMAPFB_CAPS_WINDOW_SCALE,   "scale window" },
  72         { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
  73         { OMAPFB_CAPS_WINDOW_ROTATE,  "rotate window" },
  74         { OMAPFB_CAPS_SET_BACKLIGHT,  "backlight setting" },
  75 };
  76
  77 static struct caps_table_struct color_caps[] = {
  78         { 1 << OMAPFB_COLOR_RGB565,     "RGB565", },
  79         { 1 << OMAPFB_COLOR_YUV422,     "YUV422", },
  80         { 1 << OMAPFB_COLOR_YUV420,     "YUV420", },
  81         { 1 << OMAPFB_COLOR_CLUT_8BPP,  "CLUT8", },
  82         { 1 << OMAPFB_COLOR_CLUT_4BPP,  "CLUT4", },
  83         { 1 << OMAPFB_COLOR_CLUT_2BPP,  "CLUT2", },
  84         { 1 << OMAPFB_COLOR_CLUT_1BPP,  "CLUT1", },
  85         { 1 << OMAPFB_COLOR_RGB444,     "RGB444", },
  86         { 1 << OMAPFB_COLOR_YUY422,     "YUY422", },
  87 };
  88
  89 static void omapdss_release(struct device *dev)
  90 {
  91 }
  92
  93 /* dummy device for clocks */
  94 static struct platform_device omapdss_device = {
  95         .name           = "omapdss_dss",
  96         .id             = -1,
  97         .dev            = {
  98                 .release = omapdss_release,
  99         },
 100 };
 101
 102 /*
 103  * ---------------------------------------------------------------------------
 104  * LCD panel
 105  * ---------------------------------------------------------------------------
 106  */
 107 extern struct lcd_ctrl hwa742_ctrl;
 108
 109 static const struct lcd_ctrl *ctrls[] = {
 110         &omap1_int_ctrl,
 111
 112 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
 113         &hwa742_ctrl,
 114 #endif
 115 };
 116
 117 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
 118 extern struct lcd_ctrl_extif omap1_ext_if;
 119 #endif
 120
 121 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
 122 {
 123         mutex_lock(&fbdev->rqueue_mutex);
 124 }
 125
 126 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
 127 {
 128         mutex_unlock(&fbdev->rqueue_mutex);
 129 }
 130
 131 /*
 132  * ---------------------------------------------------------------------------
 133  * LCD controller and LCD DMA
 134  * ---------------------------------------------------------------------------
 135  */
 136 /*
 137  * Allocate resources needed for LCD controller and LCD DMA operations. Video
 138  * memory is allocated from system memory according to the virtual display
 139  * size, except if a bigger memory size is specified explicitly as a kernel
 140  * parameter.
 141  */
 142 static int ctrl_init(struct omapfb_device *fbdev)
 143 {
 144         int r;
 145         int i;
 146
 147         /* kernel/module vram parameters override boot tags/board config */
 148         if (def_vram_cnt) {
 149                 for (i = 0; i < def_vram_cnt; i++)
 150                         fbdev->mem_desc.region[i].size =
 151                                 PAGE_ALIGN(def_vram[i]);
 152                 fbdev->mem_desc.region_cnt = i;
 153         }
 154
 155         if (!fbdev->mem_desc.region_cnt) {
 156                 struct lcd_panel *panel = fbdev->panel;
 157                 int def_size;
 158                 int bpp = panel->bpp;
 159
 160                 /* 12 bpp is packed in 16 bits */
 161                 if (bpp == 12)
 162                         bpp = 16;
 163                 def_size = def_vxres * def_vyres * bpp / 8;
 164                 fbdev->mem_desc.region_cnt = 1;
 165                 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
 166         }
 167         r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
 168         if (r < 0) {
 169                 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
 170                         r);
 171                 return r;
 172         }
 173
 174 #ifdef DEBUG
 175         for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
 176                 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
 177                          i,
 178                          fbdev->mem_desc.region[i].paddr,
 179                          fbdev->mem_desc.region[i].vaddr,
 180                          fbdev->mem_desc.region[i].size);
 181         }
 182 #endif
 183         return 0;
 184 }
 185
 186 static void ctrl_cleanup(struct omapfb_device *fbdev)
 187 {
 188         fbdev->ctrl->cleanup();
 189 }
 190
 191 /* Must be called with fbdev->rqueue_mutex held. */
 192 static int ctrl_change_mode(struct fb_info *fbi)
 193 {
 194         int r;
 195         unsigned long offset;
 196         struct omapfb_plane_struct *plane = fbi->par;
 197         struct omapfb_device *fbdev = plane->fbdev;
 198         struct fb_var_screeninfo *var = &fbi->var;
 199
 200         offset = var->yoffset * fbi->fix.line_length +
 201                  var->xoffset * var->bits_per_pixel / 8;
 202
 203         if (fbdev->ctrl->sync)
 204                 fbdev->ctrl->sync();
 205         r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
 206                                  offset, var->xres_virtual,
 207                                  plane->info.pos_x, plane->info.pos_y,
 208                                  var->xres, var->yres, plane->color_mode);
 209         if (r < 0)
 210                 return r;
 211
 212         if (fbdev->ctrl->set_rotate != NULL) {
 213                 r = fbdev->ctrl->set_rotate(var->rotate);
 214                 if (r < 0)
 215                         return r;
 216         }
 217
 218         if (fbdev->ctrl->set_scale != NULL)
 219                 r = fbdev->ctrl->set_scale(plane->idx,
 220                                    var->xres, var->yres,
 221                                    plane->info.out_width,
 222                                    plane->info.out_height);
 223
 224         return r;
 225 }
 226
 227 /*
 228  * ---------------------------------------------------------------------------
 229  * fbdev framework callbacks and the ioctl interface
 230  * ---------------------------------------------------------------------------
 231  */
 232 /* Called each time the omapfb device is opened */
 233 static int omapfb_open(struct fb_info *info, int user)
 234 {
 235         return 0;
 236 }
 237
 238 static void omapfb_sync(struct fb_info *info);
 239
 240 /* Called when the omapfb device is closed. We make sure that any pending
 241  * gfx DMA operations are ended, before we return. */
 242 static int omapfb_release(struct fb_info *info, int user)
 243 {
 244         omapfb_sync(info);
 245         return 0;
 246 }
 247
 248 /* Store a single color palette entry into a pseudo palette or the hardware
 249  * palette if one is available. For now we support only 16bpp and thus store
 250  * the entry only to the pseudo palette.
 251  */
 252 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
 253                         u_int blue, u_int transp, int update_hw_pal)
 254 {
 255         struct omapfb_plane_struct *plane = info->par;
 256         struct omapfb_device *fbdev = plane->fbdev;
 257         struct fb_var_screeninfo *var = &info->var;
 258         int r = 0;
 259
 260         switch (plane->color_mode) {
 261         case OMAPFB_COLOR_YUV422:
 262         case OMAPFB_COLOR_YUV420:
 263         case OMAPFB_COLOR_YUY422:
 264                 r = -EINVAL;
 265                 break;
 266         case OMAPFB_COLOR_CLUT_8BPP:
 267         case OMAPFB_COLOR_CLUT_4BPP:
 268         case OMAPFB_COLOR_CLUT_2BPP:
 269         case OMAPFB_COLOR_CLUT_1BPP:
 270                 if (fbdev->ctrl->setcolreg)
 271                         r = fbdev->ctrl->setcolreg(regno, red, green, blue,
 272                                                         transp, update_hw_pal);
 273                 /* Fallthrough */
 274         case OMAPFB_COLOR_RGB565:
 275         case OMAPFB_COLOR_RGB444:
 276                 if (r != 0)
 277                         break;
 278
 279                 if (regno < 16) {
 280                         u16 pal;
 281                         pal = ((red >> (16 - var->red.length)) <<
 282                                         var->red.offset) |
 283                               ((green >> (16 - var->green.length)) <<
 284                                         var->green.offset) |
 285                               (blue >> (16 - var->blue.length));
 286                         ((u32 *)(info->pseudo_palette))[regno] = pal;
 287                 }
 288                 break;
 289         default:
 290                 BUG();
 291         }
 292         return r;
 293 }
 294
 295 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 296                             u_int transp, struct fb_info *info)
 297 {
 298         return _setcolreg(info, regno, red, green, blue, transp, 1);
 299 }
 300
 301 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
 302 {
 303         int count, index, r;
 304         u16 *red, *green, *blue, *transp;
 305         u16 trans = 0xffff;
 306
 307         red     = cmap->red;
 308         green   = cmap->green;
 309         blue    = cmap->blue;
 310         transp  = cmap->transp;
 311         index   = cmap->start;
 312
 313         for (count = 0; count < cmap->len; count++) {
 314                 if (transp)
 315                         trans = *transp++;
 316                 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
 317                                 count == cmap->len - 1);
 318                 if (r != 0)
 319                         return r;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int omapfb_update_full_screen(struct fb_info *fbi);
 326
 327 static int omapfb_blank(int blank, struct fb_info *fbi)
 328 {
 329         struct omapfb_plane_struct *plane = fbi->par;
 330         struct omapfb_device *fbdev = plane->fbdev;
 331         int do_update = 0;
 332         int r = 0;
 333
 334         omapfb_rqueue_lock(fbdev);
 335         switch (blank) {
 336         case FB_BLANK_UNBLANK:
 337                 if (fbdev->state == OMAPFB_SUSPENDED) {
 338                         if (fbdev->ctrl->resume)
 339                                 fbdev->ctrl->resume();
 340                         if (fbdev->panel->enable)
 341                                 fbdev->panel->enable(fbdev->panel);
 342                         fbdev->state = OMAPFB_ACTIVE;
 343                         if (fbdev->ctrl->get_update_mode() ==
 344                                         OMAPFB_MANUAL_UPDATE)
 345                                 do_update = 1;
 346                 }
 347                 break;
 348         case FB_BLANK_POWERDOWN:
 349                 if (fbdev->state == OMAPFB_ACTIVE) {
 350                         if (fbdev->panel->disable)
 351                                 fbdev->panel->disable(fbdev->panel);
 352                         if (fbdev->ctrl->suspend)
 353                                 fbdev->ctrl->suspend();
 354                         fbdev->state = OMAPFB_SUSPENDED;
 355                 }
 356                 break;
 357         default:
 358                 r = -EINVAL;
 359         }
 360         omapfb_rqueue_unlock(fbdev);
 361
 362         if (r == 0 && do_update)
 363                 r = omapfb_update_full_screen(fbi);
 364
 365         return r;
 366 }
 367
 368 static void omapfb_sync(struct fb_info *fbi)
 369 {
 370         struct omapfb_plane_struct *plane = fbi->par;
 371         struct omapfb_device *fbdev = plane->fbdev;
 372
 373         omapfb_rqueue_lock(fbdev);
 374         if (fbdev->ctrl->sync)
 375                 fbdev->ctrl->sync();
 376         omapfb_rqueue_unlock(fbdev);
 377 }
 378
 379 /*
 380  * Set fb_info.fix fields and also updates fbdev.
 381  * When calling this fb_info.var must be set up already.
 382  */
 383 static void set_fb_fix(struct fb_info *fbi, int from_init)
 384 {
 385         struct fb_fix_screeninfo *fix = &fbi->fix;
 386         struct fb_var_screeninfo *var = &fbi->var;
 387         struct omapfb_plane_struct *plane = fbi->par;
 388         struct omapfb_mem_region *rg;
 389         int bpp;
 390
 391         rg = &plane->fbdev->mem_desc.region[plane->idx];
 392         fbi->screen_base        = rg->vaddr;
 393
 394         if (!from_init) {
 395                 mutex_lock(&fbi->mm_lock);
 396                 fix->smem_start         = rg->paddr;
 397                 fix->smem_len           = rg->size;
 398                 mutex_unlock(&fbi->mm_lock);
 399         } else {
 400                 fix->smem_start         = rg->paddr;
 401                 fix->smem_len           = rg->size;
 402         }
 403
 404         fix->type = FB_TYPE_PACKED_PIXELS;
 405         bpp = var->bits_per_pixel;
 406         if (var->nonstd)
 407                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 408         else switch (var->bits_per_pixel) {
 409         case 16:
 410         case 12:
 411                 fix->visual = FB_VISUAL_TRUECOLOR;
 412                 /* 12bpp is stored in 16 bits */
 413                 bpp = 16;
 414                 break;
 415         case 1:
 416         case 2:
 417         case 4:
 418         case 8:
 419                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 420                 break;
 421         }
 422         fix->accel              = FB_ACCEL_OMAP1610;
 423         fix->line_length        = var->xres_virtual * bpp / 8;
 424 }
 425
 426 static int set_color_mode(struct omapfb_plane_struct *plane,
 427                           struct fb_var_screeninfo *var)
 428 {
 429         switch (var->nonstd) {
 430         case 0:
 431                 break;
 432         case OMAPFB_COLOR_YUV422:
 433                 var->bits_per_pixel = 16;
 434                 plane->color_mode = var->nonstd;
 435                 return 0;
 436         case OMAPFB_COLOR_YUV420:
 437                 var->bits_per_pixel = 12;
 438                 plane->color_mode = var->nonstd;
 439                 return 0;
 440         case OMAPFB_COLOR_YUY422:
 441                 var->bits_per_pixel = 16;
 442                 plane->color_mode = var->nonstd;
 443                 return 0;
 444         default:
 445                 return -EINVAL;
 446         }
 447
 448         switch (var->bits_per_pixel) {
 449         case 1:
 450                 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
 451                 return 0;
 452         case 2:
 453                 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
 454                 return 0;
 455         case 4:
 456                 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
 457                 return 0;
 458         case 8:
 459                 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
 460                 return 0;
 461         case 12:
 462                 var->bits_per_pixel = 16;
 463         case 16:
 464                 if (plane->fbdev->panel->bpp == 12)
 465                         plane->color_mode = OMAPFB_COLOR_RGB444;
 466                 else
 467                         plane->color_mode = OMAPFB_COLOR_RGB565;
 468                 return 0;
 469         default:
 470                 return -EINVAL;
 471         }
 472 }
 473
 474 /*
 475  * Check the values in var against our capabilities and in case of out of
 476  * bound values try to adjust them.
 477  */
 478 static int set_fb_var(struct fb_info *fbi,
 479                       struct fb_var_screeninfo *var)
 480 {
 481         int             bpp;
 482         unsigned long   max_frame_size;
 483         unsigned long   line_size;
 484         int             xres_min, xres_max;
 485         int             yres_min, yres_max;
 486         struct omapfb_plane_struct *plane = fbi->par;
 487         struct omapfb_device *fbdev = plane->fbdev;
 488         struct lcd_panel *panel = fbdev->panel;
 489
 490         if (set_color_mode(plane, var) < 0)
 491                 return -EINVAL;
 492
 493         bpp = var->bits_per_pixel;
 494         if (plane->color_mode == OMAPFB_COLOR_RGB444)
 495                 bpp = 16;
 496
 497         switch (var->rotate) {
 498         case 0:
 499         case 180:
 500                 xres_min = OMAPFB_PLANE_XRES_MIN;
 501                 xres_max = panel->x_res;
 502                 yres_min = OMAPFB_PLANE_YRES_MIN;
 503                 yres_max = panel->y_res;
 504                 if (cpu_is_omap15xx()) {
 505                         var->xres = panel->x_res;
 506                         var->yres = panel->y_res;
 507                 }
 508                 break;
 509         case 90:
 510         case 270:
 511                 xres_min = OMAPFB_PLANE_YRES_MIN;
 512                 xres_max = panel->y_res;
 513                 yres_min = OMAPFB_PLANE_XRES_MIN;
 514                 yres_max = panel->x_res;
 515                 if (cpu_is_omap15xx()) {
 516                         var->xres = panel->y_res;
 517                         var->yres = panel->x_res;
 518                 }
 519                 break;
 520         default:
 521                 return -EINVAL;
 522         }
 523
 524         if (var->xres < xres_min)
 525                 var->xres = xres_min;
 526         if (var->yres < yres_min)
 527                 var->yres = yres_min;
 528         if (var->xres > xres_max)
 529                 var->xres = xres_max;
 530         if (var->yres > yres_max)
 531                 var->yres = yres_max;
 532
 533         if (var->xres_virtual < var->xres)
 534                 var->xres_virtual = var->xres;
 535         if (var->yres_virtual < var->yres)
 536                 var->yres_virtual = var->yres;
 537         max_frame_size = fbdev->mem_desc.region[plane->idx].size;
 538         line_size = var->xres_virtual * bpp / 8;
 539         if (line_size * var->yres_virtual > max_frame_size) {
 540                 /* Try to keep yres_virtual first */
 541                 line_size = max_frame_size / var->yres_virtual;
 542                 var->xres_virtual = line_size * 8 / bpp;
 543                 if (var->xres_virtual < var->xres) {
 544                         /* Still doesn't fit. Shrink yres_virtual too */
 545                         var->xres_virtual = var->xres;
 546                         line_size = var->xres * bpp / 8;
 547                         var->yres_virtual = max_frame_size / line_size;
 548                 }
 549                 /* Recheck this, as the virtual size changed. */
 550                 if (var->xres_virtual < var->xres)
 551                         var->xres = var->xres_virtual;
 552                 if (var->yres_virtual < var->yres)
 553                         var->yres = var->yres_virtual;
 554                 if (var->xres < xres_min || var->yres < yres_min)
 555                         return -EINVAL;
 556         }
 557         if (var->xres + var->xoffset > var->xres_virtual)
 558                 var->xoffset = var->xres_virtual - var->xres;
 559         if (var->yres + var->yoffset > var->yres_virtual)
 560                 var->yoffset = var->yres_virtual - var->yres;
 561
 562         if (plane->color_mode == OMAPFB_COLOR_RGB444) {
 563                 var->red.offset   = 8; var->red.length   = 4;
 564                                                 var->red.msb_right   = 0;
 565                 var->green.offset = 4; var->green.length = 4;
 566                                                 var->green.msb_right = 0;
 567                 var->blue.offset  = 0; var->blue.length  = 4;
 568                                                 var->blue.msb_right  = 0;
 569         } else {
 570                 var->red.offset  = 11; var->red.length   = 5;
 571                                                 var->red.msb_right   = 0;
 572                 var->green.offset = 5;  var->green.length = 6;
 573                                                 var->green.msb_right = 0;
 574                 var->blue.offset = 0;  var->blue.length  = 5;
 575                                                 var->blue.msb_right  = 0;
 576         }
 577
 578         var->height             = -1;
 579         var->width              = -1;
 580         var->grayscale          = 0;
 581
 582         /* pixclock in ps, the rest in pixclock */
 583         var->pixclock           = 10000000 / (panel->pixel_clock / 100);
 584         var->left_margin        = panel->hfp;
 585         var->right_margin       = panel->hbp;
 586         var->upper_margin       = panel->vfp;
 587         var->lower_margin       = panel->vbp;
 588         var->hsync_len          = panel->hsw;
 589         var->vsync_len          = panel->vsw;
 590
 591         /* TODO: get these from panel->config */
 592         var->vmode              = FB_VMODE_NONINTERLACED;
 593         var->sync               = 0;
 594
 595         return 0;
 596 }
 597
 598
 599 /*
 600  * Set new x,y offsets in the virtual display for the visible area and switch
 601  * to the new mode.
 602  */
 603 static int omapfb_pan_display(struct fb_var_screeninfo *var,
 604                                struct fb_info *fbi)
 605 {
 606         struct omapfb_plane_struct *plane = fbi->par;
 607         struct omapfb_device *fbdev = plane->fbdev;
 608         int r = 0;
 609
 610         omapfb_rqueue_lock(fbdev);
 611         if (var->xoffset != fbi->var.xoffset ||
 612             var->yoffset != fbi->var.yoffset) {
 613                 struct fb_var_screeninfo *new_var = &fbdev->new_var;
 614
 615                 memcpy(new_var, &fbi->var, sizeof(*new_var));
 616                 new_var->xoffset = var->xoffset;
 617                 new_var->yoffset = var->yoffset;
 618                 if (set_fb_var(fbi, new_var))
 619                         r = -EINVAL;
 620                 else {
 621                         memcpy(&fbi->var, new_var, sizeof(*new_var));
 622                         ctrl_change_mode(fbi);
 623                 }
 624         }
 625         omapfb_rqueue_unlock(fbdev);
 626
 627         return r;
 628 }
 629
 630 /* Set mirror to vertical axis and switch to the new mode. */
 631 static int omapfb_mirror(struct fb_info *fbi, int mirror)
 632 {
 633         struct omapfb_plane_struct *plane = fbi->par;
 634         struct omapfb_device *fbdev = plane->fbdev;
 635         int r = 0;
 636
 637         omapfb_rqueue_lock(fbdev);
 638         mirror = mirror ? 1 : 0;
 639         if (cpu_is_omap15xx())
 640                 r = -EINVAL;
 641         else if (mirror != plane->info.mirror) {
 642                 plane->info.mirror = mirror;
 643                 r = ctrl_change_mode(fbi);
 644         }
 645         omapfb_rqueue_unlock(fbdev);
 646
 647         return r;
 648 }
 649
 650 /*
 651  * Check values in var, try to adjust them in case of out of bound values if
 652  * possible, or return error.
 653  */
 654 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
 655 {
 656         struct omapfb_plane_struct *plane = fbi->par;
 657         struct omapfb_device *fbdev = plane->fbdev;
 658         int r;
 659
 660         omapfb_rqueue_lock(fbdev);
 661         if (fbdev->ctrl->sync != NULL)
 662                 fbdev->ctrl->sync();
 663         r = set_fb_var(fbi, var);
 664         omapfb_rqueue_unlock(fbdev);
 665
 666         return r;
 667 }
 668
 669 /*
 670  * Switch to a new mode. The parameters for it has been check already by
 671  * omapfb_check_var.
 672  */
 673 static int omapfb_set_par(struct fb_info *fbi)
 674 {
 675         struct omapfb_plane_struct *plane = fbi->par;
 676         struct omapfb_device *fbdev = plane->fbdev;
 677         int r = 0;
 678
 679         omapfb_rqueue_lock(fbdev);
 680         set_fb_fix(fbi, 0);
 681         r = ctrl_change_mode(fbi);
 682         omapfb_rqueue_unlock(fbdev);
 683
 684         return r;
 685 }
 686
 687 int omapfb_update_window_async(struct fb_info *fbi,
 688                                 struct omapfb_update_window *win,
 689                                 void (*callback)(void *),
 690                                 void *callback_data)
 691 {
 692         int xres, yres;
 693         struct omapfb_plane_struct *plane = fbi->par;
 694         struct omapfb_device *fbdev = plane->fbdev;
 695         struct fb_var_screeninfo *var = &fbi->var;
 696
 697         switch (var->rotate) {
 698         case 0:
 699         case 180:
 700                 xres = fbdev->panel->x_res;
 701                 yres = fbdev->panel->y_res;
 702                 break;
 703         case 90:
 704         case 270:
 705                 xres = fbdev->panel->y_res;
 706                 yres = fbdev->panel->x_res;
 707                 break;
 708         default:
 709                 return -EINVAL;
 710         }
 711
 712         if (win->x >= xres || win->y >= yres ||
 713             win->out_x > xres || win->out_y > yres)
 714                 return -EINVAL;
 715
 716         if (!fbdev->ctrl->update_window ||
 717             fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
 718                 return -ENODEV;
 719
 720         if (win->x + win->width > xres)
 721                 win->width = xres - win->x;
 722         if (win->y + win->height > yres)
 723                 win->height = yres - win->y;
 724         if (win->out_x + win->out_width > xres)
 725                 win->out_width = xres - win->out_x;
 726         if (win->out_y + win->out_height > yres)
 727                 win->out_height = yres - win->out_y;
 728         if (!win->width || !win->height || !win->out_width || !win->out_height)
 729                 return 0;
 730
 731         return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
 732 }
 733 EXPORT_SYMBOL(omapfb_update_window_async);
 734
 735 static int omapfb_update_win(struct fb_info *fbi,
 736                                 struct omapfb_update_window *win)
 737 {
 738         struct omapfb_plane_struct *plane = fbi->par;
 739         int ret;
 740
 741         omapfb_rqueue_lock(plane->fbdev);
 742         ret = omapfb_update_window_async(fbi, win, NULL, NULL);
 743         omapfb_rqueue_unlock(plane->fbdev);
 744
 745         return ret;
 746 }
 747
 748 static int omapfb_update_full_screen(struct fb_info *fbi)
 749 {
 750         struct omapfb_plane_struct *plane = fbi->par;
 751         struct omapfb_device *fbdev = plane->fbdev;
 752         struct omapfb_update_window win;
 753         int r;
 754
 755         if (!fbdev->ctrl->update_window ||
 756             fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
 757                 return -ENODEV;
 758
 759         win.x = 0;
 760         win.y = 0;
 761         win.width = fbi->var.xres;
 762         win.height = fbi->var.yres;
 763         win.out_x = 0;
 764         win.out_y = 0;
 765         win.out_width = fbi->var.xres;
 766         win.out_height = fbi->var.yres;
 767         win.format = 0;
 768
 769         omapfb_rqueue_lock(fbdev);
 770         r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
 771         omapfb_rqueue_unlock(fbdev);
 772
 773         return r;
 774 }
 775
 776 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
 777 {
 778         struct omapfb_plane_struct *plane = fbi->par;
 779         struct omapfb_device *fbdev = plane->fbdev;
 780         struct lcd_panel *panel = fbdev->panel;
 781         struct omapfb_plane_info old_info;
 782         int r = 0;
 783
 784         if (pi->pos_x + pi->out_width > panel->x_res ||
 785             pi->pos_y + pi->out_height > panel->y_res)
 786                 return -EINVAL;
 787
 788         omapfb_rqueue_lock(fbdev);
 789         if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
 790                 /*
 791                  * This plane's memory was freed, can't enable it
 792                  * until it's reallocated.
 793                  */
 794                 r = -EINVAL;
 795                 goto out;
 796         }
 797         old_info = plane->info;
 798         plane->info = *pi;
 799         if (pi->enabled) {
 800                 r = ctrl_change_mode(fbi);
 801                 if (r < 0) {
 802                         plane->info = old_info;
 803                         goto out;
 804                 }
 805         }
 806         r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
 807         if (r < 0) {
 808                 plane->info = old_info;
 809                 goto out;
 810         }
 811 out:
 812         omapfb_rqueue_unlock(fbdev);
 813         return r;
 814 }
 815
 816 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
 817 {
 818         struct omapfb_plane_struct *plane = fbi->par;
 819
 820         *pi = plane->info;
 821         return 0;
 822 }
 823
 824 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
 825 {
 826         struct omapfb_plane_struct *plane = fbi->par;
 827         struct omapfb_device *fbdev = plane->fbdev;
 828         struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
 829         size_t size;
 830         int r = 0;
 831
 832         if (fbdev->ctrl->setup_mem == NULL)
 833                 return -ENODEV;
 834         if (mi->type != OMAPFB_MEMTYPE_SDRAM)
 835                 return -EINVAL;
 836
 837         size = PAGE_ALIGN(mi->size);
 838         omapfb_rqueue_lock(fbdev);
 839         if (plane->info.enabled) {
 840                 r = -EBUSY;
 841                 goto out;
 842         }
 843         if (rg->size != size || rg->type != mi->type) {
 844                 struct fb_var_screeninfo *new_var = &fbdev->new_var;
 845                 unsigned long old_size = rg->size;
 846                 u8            old_type = rg->type;
 847                 unsigned long paddr;
 848
 849                 rg->size = size;
 850                 rg->type = mi->type;
 851                 /*
 852                  * size == 0 is a special case, for which we
 853                  * don't check / adjust the screen parameters.
 854                  * This isn't a problem since the plane can't
 855                  * be reenabled unless its size is > 0.
 856                  */
 857                 if (old_size != size && size) {
 858                         if (size) {
 859                                 memcpy(new_var, &fbi->var, sizeof(*new_var));
 860                                 r = set_fb_var(fbi, new_var);
 861                                 if (r < 0)
 862                                         goto out;
 863                         }
 864                 }
 865
 866                 if (fbdev->ctrl->sync)
 867                         fbdev->ctrl->sync();
 868                 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
 869                 if (r < 0) {
 870                         /* Revert changes. */
 871                         rg->size = old_size;
 872                         rg->type = old_type;
 873                         goto out;
 874                 }
 875                 rg->paddr = paddr;
 876
 877                 if (old_size != size) {
 878                         if (size) {
 879                                 memcpy(&fbi->var, new_var, sizeof(fbi->var));
 880                                 set_fb_fix(fbi, 0);
 881                         } else {
 882                                 /*
 883                                  * Set these explicitly to indicate that the
 884                                  * plane memory is dealloce'd, the other
 885                                  * screen parameters in var / fix are invalid.
 886                                  */
 887                                 mutex_lock(&fbi->mm_lock);
 888                                 fbi->fix.smem_start = 0;
 889                                 fbi->fix.smem_len = 0;
 890                                 mutex_unlock(&fbi->mm_lock);
 891                         }
 892                 }
 893         }
 894 out:
 895         omapfb_rqueue_unlock(fbdev);
 896
 897         return r;
 898 }
 899
 900 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
 901 {
 902         struct omapfb_plane_struct *plane = fbi->par;
 903         struct omapfb_device *fbdev = plane->fbdev;
 904         struct omapfb_mem_region *rg;
 905
 906         rg = &fbdev->mem_desc.region[plane->idx];
 907         memset(mi, 0, sizeof(*mi));
 908         mi->size = rg->size;
 909         mi->type = rg->type;
 910
 911         return 0;
 912 }
 913
 914 static int omapfb_set_color_key(struct omapfb_device *fbdev,
 915                                 struct omapfb_color_key *ck)
 916 {
 917         int r;
 918
 919         if (!fbdev->ctrl->set_color_key)
 920                 return -ENODEV;
 921
 922         omapfb_rqueue_lock(fbdev);
 923         r = fbdev->ctrl->set_color_key(ck);
 924         omapfb_rqueue_unlock(fbdev);
 925
 926         return r;
 927 }
 928
 929 static int omapfb_get_color_key(struct omapfb_device *fbdev,
 930                                 struct omapfb_color_key *ck)
 931 {
 932         int r;
 933
 934         if (!fbdev->ctrl->get_color_key)
 935                 return -ENODEV;
 936
 937         omapfb_rqueue_lock(fbdev);
 938         r = fbdev->ctrl->get_color_key(ck);
 939         omapfb_rqueue_unlock(fbdev);
 940
 941         return r;
 942 }
 943
 944 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
 945 static int notifier_inited;
 946
 947 static void omapfb_init_notifier(void)
 948 {
 949         int i;
 950
 951         for (i = 0; i < OMAPFB_PLANE_NUM; i++)
 952                 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
 953 }
 954
 955 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
 956                                 omapfb_notifier_callback_t callback,
 957                                 void *callback_data)
 958 {
 959         int r;
 960
 961         if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
 962                 return -EINVAL;
 963
 964         if (!notifier_inited) {
 965                 omapfb_init_notifier();
 966                 notifier_inited = 1;
 967         }
 968
 969         omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
 970                                         unsigned long, void *))callback;
 971         omapfb_nb->data = callback_data;
 972         r = blocking_notifier_chain_register(
 973                                 &omapfb_client_list[omapfb_nb->plane_idx],
 974                                 &omapfb_nb->nb);
 975         if (r)
 976                 return r;
 977         if (omapfb_dev != NULL &&
 978             omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
 979                 omapfb_dev->ctrl->bind_client(omapfb_nb);
 980         }
 981
 982         return 0;
 983 }
 984 EXPORT_SYMBOL(omapfb_register_client);
 985
 986 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
 987 {
 988         return blocking_notifier_chain_unregister(
 989                 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
 990 }
 991 EXPORT_SYMBOL(omapfb_unregister_client);
 992
 993 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
 994 {
 995         int i;
 996
 997         if (!notifier_inited)
 998                 /* no client registered yet */
 999                 return;
1000
1001         for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1002                 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1003                                     fbdev->fb_info[i]);
1004 }
1005 EXPORT_SYMBOL(omapfb_notify_clients);
1006
1007 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1008                                    enum omapfb_update_mode mode)
1009 {
1010         int r;
1011
1012         omapfb_rqueue_lock(fbdev);
1013         r = fbdev->ctrl->set_update_mode(mode);
1014         omapfb_rqueue_unlock(fbdev);
1015
1016         return r;
1017 }
1018
1019 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1020 {
1021         int r;
1022
1023         omapfb_rqueue_lock(fbdev);
1024         r = fbdev->ctrl->get_update_mode();
1025         omapfb_rqueue_unlock(fbdev);
1026
1027         return r;
1028 }
1029
1030 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1031                                      struct omapfb_caps *caps)
1032 {
1033         memset(caps, 0, sizeof(*caps));
1034         fbdev->ctrl->get_caps(plane, caps);
1035         if (fbdev->panel->get_caps)
1036                 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1037 }
1038
1039 /* For lcd testing */
1040 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1041 {
1042         omapfb_rqueue_lock(fbdev);
1043         *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1044         if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1045                 struct omapfb_update_window win;
1046
1047                 memset(&win, 0, sizeof(win));
1048                 win.width = 2;
1049                 win.height = 2;
1050                 win.out_width = 2;
1051                 win.out_height = 2;
1052                 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1053         }
1054         omapfb_rqueue_unlock(fbdev);
1055 }
1056 EXPORT_SYMBOL(omapfb_write_first_pixel);
1057
1058 /*
1059  * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1060  * here to be accessible by user mode code.
1061  */
1062 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1063                         unsigned long arg)
1064 {
1065         struct omapfb_plane_struct *plane = fbi->par;
1066         struct omapfb_device    *fbdev = plane->fbdev;
1067         struct fb_ops           *ops = fbi->fbops;
1068         union {
1069                 struct omapfb_update_window     update_window;
1070                 struct omapfb_plane_info        plane_info;
1071                 struct omapfb_mem_info          mem_info;
1072                 struct omapfb_color_key         color_key;
1073                 enum omapfb_update_mode         update_mode;
1074                 struct omapfb_caps              caps;
1075                 unsigned int            mirror;
1076                 int                     plane_out;
1077                 int                     enable_plane;
1078         } p;
1079         int r = 0;
1080
1081         BUG_ON(!ops);
1082         switch (cmd) {
1083         case OMAPFB_MIRROR:
1084                 if (get_user(p.mirror, (int __user *)arg))
1085                         r = -EFAULT;
1086                 else
1087                         omapfb_mirror(fbi, p.mirror);
1088                 break;
1089         case OMAPFB_SYNC_GFX:
1090                 omapfb_sync(fbi);
1091                 break;
1092         case OMAPFB_VSYNC:
1093                 break;
1094         case OMAPFB_SET_UPDATE_MODE:
1095                 if (get_user(p.update_mode, (int __user *)arg))
1096                         r = -EFAULT;
1097                 else
1098                         r = omapfb_set_update_mode(fbdev, p.update_mode);
1099                 break;
1100         case OMAPFB_GET_UPDATE_MODE:
1101                 p.update_mode = omapfb_get_update_mode(fbdev);
1102                 if (put_user(p.update_mode,
1103                                         (enum omapfb_update_mode __user *)arg))
1104                         r = -EFAULT;
1105                 break;
1106         case OMAPFB_UPDATE_WINDOW_OLD:
1107                 if (copy_from_user(&p.update_window, (void __user *)arg,
1108                                    sizeof(struct omapfb_update_window_old)))
1109                         r = -EFAULT;
1110                 else {
1111                         struct omapfb_update_window *u = &p.update_window;
1112                         u->out_x = u->x;
1113                         u->out_y = u->y;
1114                         u->out_width = u->width;
1115                         u->out_height = u->height;
1116                         memset(u->reserved, 0, sizeof(u->reserved));
1117                         r = omapfb_update_win(fbi, u);
1118                 }
1119                 break;
1120         case OMAPFB_UPDATE_WINDOW:
1121                 if (copy_from_user(&p.update_window, (void __user *)arg,
1122                                    sizeof(p.update_window)))
1123                         r = -EFAULT;
1124                 else
1125                         r = omapfb_update_win(fbi, &p.update_window);
1126                 break;
1127         case OMAPFB_SETUP_PLANE:
1128                 if (copy_from_user(&p.plane_info, (void __user *)arg,
1129                                    sizeof(p.plane_info)))
1130                         r = -EFAULT;
1131                 else
1132                         r = omapfb_setup_plane(fbi, &p.plane_info);
1133                 break;
1134         case OMAPFB_QUERY_PLANE:
1135                 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1136                         break;
1137                 if (copy_to_user((void __user *)arg, &p.plane_info,
1138                                    sizeof(p.plane_info)))
1139                         r = -EFAULT;
1140                 break;
1141         case OMAPFB_SETUP_MEM:
1142                 if (copy_from_user(&p.mem_info, (void __user *)arg,
1143                                    sizeof(p.mem_info)))
1144                         r = -EFAULT;
1145                 else
1146                         r = omapfb_setup_mem(fbi, &p.mem_info);
1147                 break;
1148         case OMAPFB_QUERY_MEM:
1149                 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1150                         break;
1151                 if (copy_to_user((void __user *)arg, &p.mem_info,
1152                                    sizeof(p.mem_info)))
1153                         r = -EFAULT;
1154                 break;
1155         case OMAPFB_SET_COLOR_KEY:
1156                 if (copy_from_user(&p.color_key, (void __user *)arg,
1157                                    sizeof(p.color_key)))
1158                         r = -EFAULT;
1159                 else
1160                         r = omapfb_set_color_key(fbdev, &p.color_key);
1161                 break;
1162         case OMAPFB_GET_COLOR_KEY:
1163                 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1164                         break;
1165                 if (copy_to_user((void __user *)arg, &p.color_key,
1166                                  sizeof(p.color_key)))
1167                         r = -EFAULT;
1168                 break;
1169         case OMAPFB_GET_CAPS:
1170                 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1171                 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1172                         r = -EFAULT;
1173                 break;
1174         case OMAPFB_LCD_TEST:
1175                 {
1176                         int test_num;
1177
1178                         if (get_user(test_num, (int __user *)arg)) {
1179                                 r = -EFAULT;
1180                                 break;
1181                         }
1182                         if (!fbdev->panel->run_test) {
1183                                 r = -EINVAL;
1184                                 break;
1185                         }
1186                         r = fbdev->panel->run_test(fbdev->panel, test_num);
1187                         break;
1188                 }
1189         case OMAPFB_CTRL_TEST:
1190                 {
1191                         int test_num;
1192
1193                         if (get_user(test_num, (int __user *)arg)) {
1194                                 r = -EFAULT;
1195                                 break;
1196                         }
1197                         if (!fbdev->ctrl->run_test) {
1198                                 r = -EINVAL;
1199                                 break;
1200                         }
1201                         r = fbdev->ctrl->run_test(test_num);
1202                         break;
1203                 }
1204         default:
1205                 r = -EINVAL;
1206         }
1207
1208         return r;
1209 }
1210
1211 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1212 {
1213         struct omapfb_plane_struct *plane = info->par;
1214         struct omapfb_device *fbdev = plane->fbdev;
1215         int r;
1216
1217         omapfb_rqueue_lock(fbdev);
1218         r = fbdev->ctrl->mmap(info, vma);
1219         omapfb_rqueue_unlock(fbdev);
1220
1221         return r;
1222 }
1223
1224 /*
1225  * Callback table for the frame buffer framework. Some of these pointers
1226  * will be changed according to the current setting of fb_info->accel_flags.
1227  */
1228 static struct fb_ops omapfb_ops = {
1229         .owner          = THIS_MODULE,
1230         .fb_open        = omapfb_open,
1231         .fb_release     = omapfb_release,
1232         .fb_setcolreg   = omapfb_setcolreg,
1233         .fb_setcmap     = omapfb_setcmap,
1234         .fb_fillrect    = cfb_fillrect,
1235         .fb_copyarea    = cfb_copyarea,
1236         .fb_imageblit   = cfb_imageblit,
1237         .fb_blank       = omapfb_blank,
1238         .fb_ioctl       = omapfb_ioctl,
1239         .fb_check_var   = omapfb_check_var,
1240         .fb_set_par     = omapfb_set_par,
1241         .fb_pan_display = omapfb_pan_display,
1242 };
1243
1244 /*
1245  * ---------------------------------------------------------------------------
1246  * Sysfs interface
1247  * ---------------------------------------------------------------------------
1248  */
1249 /* omapfbX sysfs entries */
1250 static ssize_t omapfb_show_caps_num(struct device *dev,
1251                                     struct device_attribute *attr, char *buf)
1252 {
1253         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1254         int plane;
1255         size_t size;
1256         struct omapfb_caps caps;
1257
1258         plane = 0;
1259         size = 0;
1260         while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1261                 omapfb_get_caps(fbdev, plane, &caps);
1262                 size += snprintf(&buf[size], PAGE_SIZE - size,
1263                         "plane#%d %#010x %#010x %#010x\n",
1264                         plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1265                 plane++;
1266         }
1267         return size;
1268 }
1269
1270 static ssize_t omapfb_show_caps_text(struct device *dev,
1271                                      struct device_attribute *attr, char *buf)
1272 {
1273         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1274         int i;
1275         struct omapfb_caps caps;
1276         int plane;
1277         size_t size;
1278
1279         plane = 0;
1280         size = 0;
1281         while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1282                 omapfb_get_caps(fbdev, plane, &caps);
1283                 size += snprintf(&buf[size], PAGE_SIZE - size,
1284                                  "plane#%d:\n", plane);
1285                 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1286                      size < PAGE_SIZE; i++) {
1287                         if (ctrl_caps[i].flag & caps.ctrl)
1288                                 size += snprintf(&buf[size], PAGE_SIZE - size,
1289                                         " %s\n", ctrl_caps[i].name);
1290                 }
1291                 size += snprintf(&buf[size], PAGE_SIZE - size,
1292                                  " plane colors:\n");
1293                 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1294                      size < PAGE_SIZE; i++) {
1295                         if (color_caps[i].flag & caps.plane_color)
1296                                 size += snprintf(&buf[size], PAGE_SIZE - size,
1297                                         "  %s\n", color_caps[i].name);
1298                 }
1299                 size += snprintf(&buf[size], PAGE_SIZE - size,
1300                                  " window colors:\n");
1301                 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1302                      size < PAGE_SIZE; i++) {
1303                         if (color_caps[i].flag & caps.wnd_color)
1304                                 size += snprintf(&buf[size], PAGE_SIZE - size,
1305                                         "  %s\n", color_caps[i].name);
1306                 }
1307
1308                 plane++;
1309         }
1310         return size;
1311 }
1312
1313 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1314 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1315
1316 /* panel sysfs entries */
1317 static ssize_t omapfb_show_panel_name(struct device *dev,
1318                                       struct device_attribute *attr, char *buf)
1319 {
1320         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1321
1322         return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1323 }
1324
1325 static ssize_t omapfb_show_bklight_level(struct device *dev,
1326                                          struct device_attribute *attr,
1327                                          char *buf)
1328 {
1329         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1330         int r;
1331
1332         if (fbdev->panel->get_bklight_level) {
1333                 r = snprintf(buf, PAGE_SIZE, "%d\n",
1334                              fbdev->panel->get_bklight_level(fbdev->panel));
1335         } else
1336                 r = -ENODEV;
1337         return r;
1338 }
1339
1340 static ssize_t omapfb_store_bklight_level(struct device *dev,
1341                                           struct device_attribute *attr,
1342                                           const char *buf, size_t size)
1343 {
1344         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1345         int r;
1346
1347         if (fbdev->panel->set_bklight_level) {
1348                 unsigned int level;
1349
1350                 if (sscanf(buf, "%10d", &level) == 1) {
1351                         r = fbdev->panel->set_bklight_level(fbdev->panel,
1352                                                             level);
1353                 } else
1354                         r = -EINVAL;
1355         } else
1356                 r = -ENODEV;
1357         return r ? r : size;
1358 }
1359
1360 static ssize_t omapfb_show_bklight_max(struct device *dev,
1361                                        struct device_attribute *attr, char *buf)
1362 {
1363         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1364         int r;
1365
1366         if (fbdev->panel->get_bklight_level) {
1367                 r = snprintf(buf, PAGE_SIZE, "%d\n",
1368                              fbdev->panel->get_bklight_max(fbdev->panel));
1369         } else
1370                 r = -ENODEV;
1371         return r;
1372 }
1373
1374 static struct device_attribute dev_attr_panel_name =
1375         __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1376 static DEVICE_ATTR(backlight_level, 0664,
1377                    omapfb_show_bklight_level, omapfb_store_bklight_level);
1378 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1379
1380 static struct attribute *panel_attrs[] = {
1381         &dev_attr_panel_name.attr,
1382         &dev_attr_backlight_level.attr,
1383         &dev_attr_backlight_max.attr,
1384         NULL,
1385 };
1386
1387 static struct attribute_group panel_attr_grp = {
1388         .name  = "panel",
1389         .attrs = panel_attrs,
1390 };
1391
1392 /* ctrl sysfs entries */
1393 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1394                                      struct device_attribute *attr, char *buf)
1395 {
1396         struct omapfb_device *fbdev = dev_get_drvdata(dev);
1397
1398         return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1399 }
1400
1401 static struct device_attribute dev_attr_ctrl_name =
1402         __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1403
1404 static struct attribute *ctrl_attrs[] = {
1405         &dev_attr_ctrl_name.attr,
1406         NULL,
1407 };
1408
1409 static struct attribute_group ctrl_attr_grp = {
1410         .name  = "ctrl",
1411         .attrs = ctrl_attrs,
1412 };
1413
1414 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1415 {
1416         int r;
1417
1418         if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1419                 goto fail0;
1420
1421         if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1422                 goto fail1;
1423
1424         if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1425                 goto fail2;
1426
1427         if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1428                 goto fail3;
1429
1430         return 0;
1431 fail3:
1432         sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1433 fail2:
1434         device_remove_file(fbdev->dev, &dev_attr_caps_text);
1435 fail1:
1436         device_remove_file(fbdev->dev, &dev_attr_caps_num);
1437 fail0:
1438         dev_err(fbdev->dev, "unable to register sysfs interface\n");
1439         return r;
1440 }
1441
1442 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1443 {
1444         sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1445         sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1446         device_remove_file(fbdev->dev, &dev_attr_caps_num);
1447         device_remove_file(fbdev->dev, &dev_attr_caps_text);
1448 }
1449
1450 /*
1451  * ---------------------------------------------------------------------------
1452  * LDM callbacks
1453  * ---------------------------------------------------------------------------
1454  */
1455 /* Initialize system fb_info object and set the default video mode.
1456  * The frame buffer memory already allocated by lcddma_init
1457  */
1458 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1459 {
1460         struct fb_var_screeninfo        *var = &info->var;
1461         struct fb_fix_screeninfo        *fix = &info->fix;
1462         int                             r = 0;
1463
1464         info->fbops = &omapfb_ops;
1465         info->flags = FBINFO_FLAG_DEFAULT;
1466
1467         strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1468
1469         info->pseudo_palette = fbdev->pseudo_palette;
1470
1471         var->accel_flags  = def_accel ? FB_ACCELF_TEXT : 0;
1472         var->xres = def_vxres;
1473         var->yres = def_vyres;
1474         var->xres_virtual = def_vxres;
1475         var->yres_virtual = def_vyres;
1476         var->rotate       = def_rotate;
1477         var->bits_per_pixel = fbdev->panel->bpp;
1478
1479         set_fb_var(info, var);
1480         set_fb_fix(info, 1);
1481
1482         r = fb_alloc_cmap(&info->cmap, 16, 0);
1483         if (r != 0)
1484                 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1485
1486         return r;
1487 }
1488
1489 /* Release the fb_info object */
1490 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1491 {
1492         fb_dealloc_cmap(&fbi->cmap);
1493 }
1494
1495 static void planes_cleanup(struct omapfb_device *fbdev)
1496 {
1497         int i;
1498
1499         for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1500                 if (fbdev->fb_info[i] == NULL)
1501                         break;
1502                 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1503                 framebuffer_release(fbdev->fb_info[i]);
1504         }
1505 }
1506
1507 static int planes_init(struct omapfb_device *fbdev)
1508 {
1509         struct fb_info *fbi;
1510         int i;
1511         int r;
1512
1513         for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1514                 struct omapfb_plane_struct *plane;
1515                 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1516                                         fbdev->dev);
1517                 if (fbi == NULL) {
1518                         dev_err(fbdev->dev,
1519                                 "unable to allocate memory for plane info\n");
1520                         planes_cleanup(fbdev);
1521                         return -ENOMEM;
1522                 }
1523                 plane = fbi->par;
1524                 plane->idx = i;
1525                 plane->fbdev = fbdev;
1526                 plane->info.mirror = def_mirror;
1527                 fbdev->fb_info[i] = fbi;
1528
1529                 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1530                         framebuffer_release(fbi);
1531                         planes_cleanup(fbdev);
1532                         return r;
1533                 }
1534                 plane->info.out_width = fbi->var.xres;
1535                 plane->info.out_height = fbi->var.yres;
1536         }
1537         return 0;
1538 }
1539
1540 /*
1541  * Free driver resources. Can be called to rollback an aborted initialization
1542  * sequence.
1543  */
1544 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1545 {
1546         int i;
1547
1548         switch (state) {
1549         case OMAPFB_ACTIVE:
1550                 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1551                         unregister_framebuffer(fbdev->fb_info[i]);
1552         case 7:
1553                 omapfb_unregister_sysfs(fbdev);
1554         case 6:
1555                 if (fbdev->panel->disable)
1556                         fbdev->panel->disable(fbdev->panel);
1557         case 5:
1558                 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1559         case 4:
1560                 planes_cleanup(fbdev);
1561         case 3:
1562                 ctrl_cleanup(fbdev);
1563         case 2:
1564                 if (fbdev->panel->cleanup)
1565                         fbdev->panel->cleanup(fbdev->panel);
1566         case 1:
1567                 dev_set_drvdata(fbdev->dev, NULL);
1568                 kfree(fbdev);
1569         case 0:
1570                 /* nothing to free */
1571                 break;
1572         default:
1573                 BUG();
1574         }
1575 }
1576
1577 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1578 {
1579         struct omapfb_platform_data *conf;
1580         char name[17];
1581         int i;
1582
1583         conf = dev_get_platdata(fbdev->dev);
1584
1585         fbdev->ctrl = NULL;
1586
1587         strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1588         name[sizeof(name) - 1] = '\0';
1589
1590         if (strcmp(name, "internal") == 0) {
1591                 fbdev->ctrl = fbdev->int_ctrl;
1592                 return 0;
1593         }
1594
1595         for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1596                 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1597                 if (strcmp(ctrls[i]->name, name) == 0) {
1598                         fbdev->ctrl = ctrls[i];
1599                         break;
1600                 }
1601         }
1602
1603         if (fbdev->ctrl == NULL) {
1604                 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1605                 return -1;
1606         }
1607
1608         return 0;
1609 }
1610
1611 /*
1612  * Called by LDM binding to probe and attach a new device.
1613  * Initialization sequence:
1614  *   1. allocate system omapfb_device structure
1615  *   2. select controller type according to platform configuration
1616  *      init LCD panel
1617  *   3. init LCD controller and LCD DMA
1618  *   4. init system fb_info structure for all planes
1619  *   5. setup video mode for first plane and enable it
1620  *   6. enable LCD panel
1621  *   7. register sysfs attributes
1622  *   OMAPFB_ACTIVE: register system fb_info structure for all planes
1623  */
1624 static int omapfb_do_probe(struct platform_device *pdev,
1625                                 struct lcd_panel *panel)
1626 {
1627         struct omapfb_device    *fbdev = NULL;
1628         int                     init_state;
1629         unsigned long           phz, hhz, vhz;
1630         unsigned long           vram;
1631         int                     i;
1632         int                     r = 0;
1633
1634         init_state = 0;
1635
1636         if (pdev->num_resources != 0) {
1637                 dev_err(&pdev->dev, "probed for an unknown device\n");
1638                 r = -ENODEV;
1639                 goto cleanup;
1640         }
1641
1642         if (dev_get_platdata(&pdev->dev) == NULL) {
1643                 dev_err(&pdev->dev, "missing platform data\n");
1644                 r = -ENOENT;
1645                 goto cleanup;
1646         }
1647
1648         fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1649         if (fbdev == NULL) {
1650                 dev_err(&pdev->dev,
1651                         "unable to allocate memory for device info\n");
1652                 r = -ENOMEM;
1653                 goto cleanup;
1654         }
1655         init_state++;
1656
1657         fbdev->dev = &pdev->dev;
1658         fbdev->panel = panel;
1659         fbdev->dssdev = &omapdss_device;
1660         platform_set_drvdata(pdev, fbdev);
1661
1662         mutex_init(&fbdev->rqueue_mutex);
1663
1664         fbdev->int_ctrl = &omap1_int_ctrl;
1665 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1666         fbdev->ext_if = &omap1_ext_if;
1667 #endif
1668         if (omapfb_find_ctrl(fbdev) < 0) {
1669                 dev_err(fbdev->dev,
1670                         "LCD controller not found, board not supported\n");
1671                 r = -ENODEV;
1672                 goto cleanup;
1673         }
1674
1675         if (fbdev->panel->init) {
1676                 r = fbdev->panel->init(fbdev->panel, fbdev);
1677                 if (r)
1678                         goto cleanup;
1679         }
1680
1681         pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1682
1683         def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1684         def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1685
1686         init_state++;
1687
1688         r = ctrl_init(fbdev);
1689         if (r)
1690                 goto cleanup;
1691         if (fbdev->ctrl->mmap != NULL)
1692                 omapfb_ops.fb_mmap = omapfb_mmap;
1693         init_state++;
1694
1695         r = planes_init(fbdev);
1696         if (r)
1697                 goto cleanup;
1698         init_state++;
1699
1700 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1701         /* Set DMA priority for EMIFF access to highest */
1702         omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1703 #endif
1704
1705         r = ctrl_change_mode(fbdev->fb_info[0]);
1706         if (r) {
1707                 dev_err(fbdev->dev, "mode setting failed\n");
1708                 goto cleanup;
1709         }
1710
1711         /* GFX plane is enabled by default */
1712         r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1713         if (r)
1714                 goto cleanup;
1715
1716         omapfb_set_update_mode(fbdev, manual_update ?
1717                                    OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1718         init_state++;
1719
1720         if (fbdev->panel->enable) {
1721                 r = fbdev->panel->enable(fbdev->panel);
1722                 if (r)
1723                         goto cleanup;
1724         }
1725         init_state++;
1726
1727         r = omapfb_register_sysfs(fbdev);
1728         if (r)
1729                 goto cleanup;
1730         init_state++;
1731
1732         vram = 0;
1733         for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1734                 r = register_framebuffer(fbdev->fb_info[i]);
1735                 if (r != 0) {
1736                         dev_err(fbdev->dev,
1737                                 "registering framebuffer %d failed\n", i);
1738                         goto cleanup;
1739                 }
1740                 vram += fbdev->mem_desc.region[i].size;
1741         }
1742
1743         fbdev->state = OMAPFB_ACTIVE;
1744
1745         panel = fbdev->panel;
1746         phz = panel->pixel_clock * 1000;
1747         hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1748         vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1749
1750         omapfb_dev = fbdev;
1751
1752         pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1753                         vram, fbdev->mem_desc.region_cnt);
1754         pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1755                         "vfreq %lu.%lu Hz\n",
1756                         phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1757
1758         return 0;
1759
1760 cleanup:
1761         omapfb_free_resources(fbdev, init_state);
1762
1763         return r;
1764 }
1765
1766 static int omapfb_probe(struct platform_device *pdev)
1767 {
1768         int r;
1769
1770         BUG_ON(fbdev_pdev != NULL);
1771
1772         r = platform_device_register(&omapdss_device);
1773         if (r) {
1774                 dev_err(&pdev->dev, "can't register omapdss device\n");
1775                 return r;
1776         }
1777
1778         /* Delay actual initialization until the LCD is registered */
1779         fbdev_pdev = pdev;
1780         if (fbdev_panel != NULL)
1781                 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1782         return 0;
1783 }
1784
1785 void omapfb_register_panel(struct lcd_panel *panel)
1786 {
1787         BUG_ON(fbdev_panel != NULL);
1788
1789         fbdev_panel = panel;
1790         if (fbdev_pdev != NULL)
1791                 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1792 }
1793 EXPORT_SYMBOL_GPL(omapfb_register_panel);
1794
1795 /* Called when the device is being detached from the driver */
1796 static int omapfb_remove(struct platform_device *pdev)
1797 {
1798         struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1799         enum omapfb_state saved_state = fbdev->state;
1800
1801         /* FIXME: wait till completion of pending events */
1802
1803         fbdev->state = OMAPFB_DISABLED;
1804         omapfb_free_resources(fbdev, saved_state);
1805
1806         platform_device_unregister(&omapdss_device);
1807         fbdev->dssdev = NULL;
1808
1809         return 0;
1810 }
1811
1812 /* PM suspend */
1813 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1814 {
1815         struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1816
1817         if (fbdev != NULL)
1818                 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1819         return 0;
1820 }
1821
1822 /* PM resume */
1823 static int omapfb_resume(struct platform_device *pdev)
1824 {
1825         struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1826
1827         if (fbdev != NULL)
1828                 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1829         return 0;
1830 }
1831
1832 static struct platform_driver omapfb_driver = {
1833         .probe          = omapfb_probe,
1834         .remove         = omapfb_remove,
1835         .suspend        = omapfb_suspend,
1836         .resume         = omapfb_resume,
1837         .driver         = {
1838                 .name   = MODULE_NAME,
1839         },
1840 };
1841
1842 #ifndef MODULE
1843
1844 /* Process kernel command line parameters */
1845 static int __init omapfb_setup(char *options)
1846 {
1847         char *this_opt = NULL;
1848         int r = 0;
1849
1850         pr_debug("omapfb: options %s\n", options);
1851
1852         if (!options || !*options)
1853                 return 0;
1854
1855         while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1856                 if (!strncmp(this_opt, "accel", 5))
1857                         def_accel = 1;
1858                 else if (!strncmp(this_opt, "vram:", 5)) {
1859                         char *suffix;
1860                         unsigned long vram;
1861                         vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1862                         switch (suffix[0]) {
1863                         case '\0':
1864                                 break;
1865                         case 'm':
1866                         case 'M':
1867                                 vram *= 1024;
1868                                 /* Fall through */
1869                         case 'k':
1870                         case 'K':
1871                                 vram *= 1024;
1872                                 break;
1873                         default:
1874                                 pr_debug("omapfb: invalid vram suffix %c\n",
1875                                          suffix[0]);
1876                                 r = -1;
1877                         }
1878                         def_vram[def_vram_cnt++] = vram;
1879                 }
1880                 else if (!strncmp(this_opt, "vxres:", 6))
1881                         def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1882                 else if (!strncmp(this_opt, "vyres:", 6))
1883                         def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1884                 else if (!strncmp(this_opt, "rotate:", 7))
1885                         def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1886                 else if (!strncmp(this_opt, "mirror:", 7))
1887                         def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1888                 else if (!strncmp(this_opt, "manual_update", 13))
1889                         manual_update = 1;
1890                 else {
1891                         pr_debug("omapfb: invalid option\n");
1892                         r = -1;
1893                 }
1894         }
1895
1896         return r;
1897 }
1898
1899 #endif
1900
1901 /* Register both the driver and the device */
1902 static int __init omapfb_init(void)
1903 {
1904 #ifndef MODULE
1905         char *option;
1906
1907         if (fb_get_options("omapfb", &option))
1908                 return -ENODEV;
1909         omapfb_setup(option);
1910 #endif
1911         /* Register the driver with LDM */
1912         if (platform_driver_register(&omapfb_driver)) {
1913                 pr_debug("failed to register omapfb driver\n");
1914                 return -ENODEV;
1915         }
1916
1917         return 0;
1918 }
1919
1920 static void __exit omapfb_cleanup(void)
1921 {
1922         platform_driver_unregister(&omapfb_driver);
1923 }
1924
1925 module_param_named(accel, def_accel, uint, 0664);
1926 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1927 module_param_named(vxres, def_vxres, long, 0664);
1928 module_param_named(vyres, def_vyres, long, 0664);
1929 module_param_named(rotate, def_rotate, uint, 0664);
1930 module_param_named(mirror, def_mirror, uint, 0664);
1931 module_param_named(manual_update, manual_update, bool, 0664);
1932
1933 module_init(omapfb_init);
1934 module_exit(omapfb_cleanup);
1935
1936 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1937 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1938 MODULE_LICENSE("GPL");