drivers/video/omap2/omapfb/omapfb-main.c

   1 /*
   2  * linux/drivers/video/omap2/omapfb-main.c
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Some code and ideas taken from drivers/video/omap/ driver
   8  * by Imre Deak.
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/delay.h>
  25 #include <linux/slab.h>
  26 #include <linux/fb.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/vmalloc.h>
  29 #include <linux/device.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/omapfb.h>
  32
  33 #include <video/omapdss.h>
  34 #include <plat/vram.h>
  35 #include <plat/vrfb.h>
  36
  37 #include "omapfb.h"
  38
  39 #define MODULE_NAME     "omapfb"
  40
  41 #define OMAPFB_PLANE_XRES_MIN           8
  42 #define OMAPFB_PLANE_YRES_MIN           8
  43
  44 static char *def_mode;
  45 static char *def_vram;
  46 static int def_vrfb;
  47 static int def_rotate;
  48 static int def_mirror;
  49 static bool auto_update;
  50 static unsigned int auto_update_freq;
  51 static bool def_vram_cache = true;
  52 module_param(auto_update, bool, 0);
  53 module_param(auto_update_freq, uint, 0644);
  54
  55 #ifdef DEBUG
  56 unsigned int omapfb_debug;
  57 module_param_named(debug, omapfb_debug, bool, 0644);
  58 static unsigned int omapfb_test_pattern;
  59 module_param_named(test, omapfb_test_pattern, bool, 0644);
  60 #endif
  61
  62 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi);
  63 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
  64                 struct omap_dss_device *dssdev);
  65
  66 #ifdef DEBUG
  67 static void draw_pixel(struct fb_info *fbi, int x, int y, unsigned color)
  68 {
  69         struct fb_var_screeninfo *var = &fbi->var;
  70         struct fb_fix_screeninfo *fix = &fbi->fix;
  71         void __iomem *addr = fbi->screen_base;
  72         const unsigned bytespp = var->bits_per_pixel >> 3;
  73         const unsigned line_len = fix->line_length / bytespp;
  74
  75         int r = (color >> 16) & 0xff;
  76         int g = (color >> 8) & 0xff;
  77         int b = (color >> 0) & 0xff;
  78
  79         if (var->bits_per_pixel == 16) {
  80                 u16 __iomem *p = (u16 __iomem *)addr;
  81                 p += y * line_len + x;
  82
  83                 r = r * 32 / 256;
  84                 g = g * 64 / 256;
  85                 b = b * 32 / 256;
  86
  87                 __raw_writew((r << 11) | (g << 5) | (b << 0), p);
  88         } else if (var->bits_per_pixel == 24) {
  89                 u8 __iomem *p = (u8 __iomem *)addr;
  90                 p += (y * line_len + x) * 3;
  91
  92                 __raw_writeb(b, p + 0);
  93                 __raw_writeb(g, p + 1);
  94                 __raw_writeb(r, p + 2);
  95         } else if (var->bits_per_pixel == 32) {
  96                 u32 __iomem *p = (u32 __iomem *)addr;
  97                 p += y * line_len + x;
  98                 __raw_writel(color, p);
  99         }
 100 }
 101
 102 static void fill_fb(struct fb_info *fbi)
 103 {
 104         struct fb_var_screeninfo *var = &fbi->var;
 105         const short w = var->xres_virtual;
 106         const short h = var->yres_virtual;
 107         void __iomem *addr = fbi->screen_base;
 108         int y, x;
 109
 110         if (!addr)
 111                 return;
 112
 113         DBG("fill_fb %dx%d, line_len %d bytes\n", w, h, fbi->fix.line_length);
 114
 115         for (y = 0; y < h; y++) {
 116                 for (x = 0; x < w; x++) {
 117                         if (x < 20 && y < 20)
 118                                 draw_pixel(fbi, x, y, 0xffffff);
 119                         else if (x < 20 && (y > 20 && y < h - 20))
 120                                 draw_pixel(fbi, x, y, 0xff);
 121                         else if (y < 20 && (x > 20 && x < w - 20))
 122                                 draw_pixel(fbi, x, y, 0xff00);
 123                         else if (x > w - 20 && (y > 20 && y < h - 20))
 124                                 draw_pixel(fbi, x, y, 0xff0000);
 125                         else if (y > h - 20 && (x > 20 && x < w - 20))
 126                                 draw_pixel(fbi, x, y, 0xffff00);
 127                         else if (x == 20 || x == w - 20 ||
 128                                         y == 20 || y == h - 20)
 129                                 draw_pixel(fbi, x, y, 0xffffff);
 130                         else if (x == y || w - x == h - y)
 131                                 draw_pixel(fbi, x, y, 0xff00ff);
 132                         else if (w - x == y || x == h - y)
 133                                 draw_pixel(fbi, x, y, 0x00ffff);
 134                         else if (x > 20 && y > 20 && x < w - 20 && y < h - 20) {
 135                                 int t = x * 3 / w;
 136                                 unsigned r = 0, g = 0, b = 0;
 137                                 unsigned c;
 138                                 if (var->bits_per_pixel == 16) {
 139                                         if (t == 0)
 140                                                 b = (y % 32) * 256 / 32;
 141                                         else if (t == 1)
 142                                                 g = (y % 64) * 256 / 64;
 143                                         else if (t == 2)
 144                                                 r = (y % 32) * 256 / 32;
 145                                 } else {
 146                                         if (t == 0)
 147                                                 b = (y % 256);
 148                                         else if (t == 1)
 149                                                 g = (y % 256);
 150                                         else if (t == 2)
 151                                                 r = (y % 256);
 152                                 }
 153                                 c = (r << 16) | (g << 8) | (b << 0);
 154                                 draw_pixel(fbi, x, y, c);
 155                         } else {
 156                                 draw_pixel(fbi, x, y, 0);
 157                         }
 158                 }
 159         }
 160 }
 161 #endif
 162
 163 static unsigned omapfb_get_vrfb_offset(const struct omapfb_info *ofbi, int rot)
 164 {
 165         const struct vrfb *vrfb = &ofbi->region->vrfb;
 166         unsigned offset;
 167
 168         switch (rot) {
 169         case FB_ROTATE_UR:
 170                 offset = 0;
 171                 break;
 172         case FB_ROTATE_CW:
 173                 offset = vrfb->yoffset;
 174                 break;
 175         case FB_ROTATE_UD:
 176                 offset = vrfb->yoffset * OMAP_VRFB_LINE_LEN + vrfb->xoffset;
 177                 break;
 178         case FB_ROTATE_CCW:
 179                 offset = vrfb->xoffset * OMAP_VRFB_LINE_LEN;
 180                 break;
 181         default:
 182                 BUG();
 183         }
 184
 185         offset *= vrfb->bytespp;
 186
 187         return offset;
 188 }
 189
 190 static u32 omapfb_get_region_rot_paddr(const struct omapfb_info *ofbi, int rot)
 191 {
 192         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 193                 return ofbi->region->vrfb.paddr[rot]
 194                         + omapfb_get_vrfb_offset(ofbi, rot);
 195         } else {
 196                 return ofbi->region->paddr;
 197         }
 198 }
 199
 200 static u32 omapfb_get_region_paddr(const struct omapfb_info *ofbi)
 201 {
 202         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 203                 return ofbi->region->vrfb.paddr[0];
 204         else
 205                 return ofbi->region->paddr;
 206 }
 207
 208 static void __iomem *omapfb_get_region_vaddr(const struct omapfb_info *ofbi)
 209 {
 210         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 211                 return ofbi->region->vrfb.vaddr[0];
 212         else
 213                 return ofbi->region->vaddr;
 214 }
 215
 216 static struct omapfb_colormode omapfb_colormodes[] = {
 217         {
 218                 .dssmode = OMAP_DSS_COLOR_UYVY,
 219                 .bits_per_pixel = 16,
 220                 .nonstd = OMAPFB_COLOR_YUV422,
 221         }, {
 222                 .dssmode = OMAP_DSS_COLOR_YUV2,
 223                 .bits_per_pixel = 16,
 224                 .nonstd = OMAPFB_COLOR_YUY422,
 225         }, {
 226                 .dssmode = OMAP_DSS_COLOR_ARGB16,
 227                 .bits_per_pixel = 16,
 228                 .red    = { .length = 4, .offset = 8, .msb_right = 0 },
 229                 .green  = { .length = 4, .offset = 4, .msb_right = 0 },
 230                 .blue   = { .length = 4, .offset = 0, .msb_right = 0 },
 231                 .transp = { .length = 4, .offset = 12, .msb_right = 0 },
 232         }, {
 233                 .dssmode = OMAP_DSS_COLOR_RGB16,
 234                 .bits_per_pixel = 16,
 235                 .red    = { .length = 5, .offset = 11, .msb_right = 0 },
 236                 .green  = { .length = 6, .offset = 5, .msb_right = 0 },
 237                 .blue   = { .length = 5, .offset = 0, .msb_right = 0 },
 238                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 239         }, {
 240                 .dssmode = OMAP_DSS_COLOR_RGB24P,
 241                 .bits_per_pixel = 24,
 242                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 243                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 244                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 245                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 246         }, {
 247                 .dssmode = OMAP_DSS_COLOR_RGB24U,
 248                 .bits_per_pixel = 32,
 249                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 250                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 251                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 252                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 253         }, {
 254                 .dssmode = OMAP_DSS_COLOR_ARGB32,
 255                 .bits_per_pixel = 32,
 256                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
 257                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
 258                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
 259                 .transp = { .length = 8, .offset = 24, .msb_right = 0 },
 260         }, {
 261                 .dssmode = OMAP_DSS_COLOR_RGBA32,
 262                 .bits_per_pixel = 32,
 263                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
 264                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
 265                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
 266                 .transp = { .length = 8, .offset = 0, .msb_right = 0 },
 267         }, {
 268                 .dssmode = OMAP_DSS_COLOR_RGBX32,
 269                 .bits_per_pixel = 32,
 270                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
 271                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
 272                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
 273                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
 274         },
 275 };
 276
 277 static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
 278                 struct omapfb_colormode *color)
 279 {
 280         bool cmp_component(struct fb_bitfield *f1, struct fb_bitfield *f2)
 281         {
 282                 return f1->length == f2->length &&
 283                         f1->offset == f2->offset &&
 284                         f1->msb_right == f2->msb_right;
 285         }
 286
 287         if (var->bits_per_pixel == 0 ||
 288                         var->red.length == 0 ||
 289                         var->blue.length == 0 ||
 290                         var->green.length == 0)
 291                 return 0;
 292
 293         return var->bits_per_pixel == color->bits_per_pixel &&
 294                 cmp_component(&var->red, &color->red) &&
 295                 cmp_component(&var->green, &color->green) &&
 296                 cmp_component(&var->blue, &color->blue) &&
 297                 cmp_component(&var->transp, &color->transp);
 298 }
 299
 300 static void assign_colormode_to_var(struct fb_var_screeninfo *var,
 301                 struct omapfb_colormode *color)
 302 {
 303         var->bits_per_pixel = color->bits_per_pixel;
 304         var->nonstd = color->nonstd;
 305         var->red = color->red;
 306         var->green = color->green;
 307         var->blue = color->blue;
 308         var->transp = color->transp;
 309 }
 310
 311 static int fb_mode_to_dss_mode(struct fb_var_screeninfo *var,
 312                 enum omap_color_mode *mode)
 313 {
 314         enum omap_color_mode dssmode;
 315         int i;
 316
 317         /* first match with nonstd field */
 318         if (var->nonstd) {
 319                 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 320                         struct omapfb_colormode *m = &omapfb_colormodes[i];
 321                         if (var->nonstd == m->nonstd) {
 322                                 assign_colormode_to_var(var, m);
 323                                 *mode = m->dssmode;
 324                                 return 0;
 325                         }
 326                 }
 327
 328                 return -EINVAL;
 329         }
 330
 331         /* then try exact match of bpp and colors */
 332         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 333                 struct omapfb_colormode *m = &omapfb_colormodes[i];
 334                 if (cmp_var_to_colormode(var, m)) {
 335                         assign_colormode_to_var(var, m);
 336                         *mode = m->dssmode;
 337                         return 0;
 338                 }
 339         }
 340
 341         /* match with bpp if user has not filled color fields
 342          * properly */
 343         switch (var->bits_per_pixel) {
 344         case 1:
 345                 dssmode = OMAP_DSS_COLOR_CLUT1;
 346                 break;
 347         case 2:
 348                 dssmode = OMAP_DSS_COLOR_CLUT2;
 349                 break;
 350         case 4:
 351                 dssmode = OMAP_DSS_COLOR_CLUT4;
 352                 break;
 353         case 8:
 354                 dssmode = OMAP_DSS_COLOR_CLUT8;
 355                 break;
 356         case 12:
 357                 dssmode = OMAP_DSS_COLOR_RGB12U;
 358                 break;
 359         case 16:
 360                 dssmode = OMAP_DSS_COLOR_RGB16;
 361                 break;
 362         case 24:
 363                 dssmode = OMAP_DSS_COLOR_RGB24P;
 364                 break;
 365         case 32:
 366                 dssmode = OMAP_DSS_COLOR_RGB24U;
 367                 break;
 368         default:
 369                 return -EINVAL;
 370         }
 371
 372         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 373                 struct omapfb_colormode *m = &omapfb_colormodes[i];
 374                 if (dssmode == m->dssmode) {
 375                         assign_colormode_to_var(var, m);
 376                         *mode = m->dssmode;
 377                         return 0;
 378                 }
 379         }
 380
 381         return -EINVAL;
 382 }
 383
 384 static int check_fb_res_bounds(struct fb_var_screeninfo *var)
 385 {
 386         int xres_min = OMAPFB_PLANE_XRES_MIN;
 387         int xres_max = 2048;
 388         int yres_min = OMAPFB_PLANE_YRES_MIN;
 389         int yres_max = 2048;
 390
 391         /* XXX: some applications seem to set virtual res to 0. */
 392         if (var->xres_virtual == 0)
 393                 var->xres_virtual = var->xres;
 394
 395         if (var->yres_virtual == 0)
 396                 var->yres_virtual = var->yres;
 397
 398         if (var->xres_virtual < xres_min || var->yres_virtual < yres_min)
 399                 return -EINVAL;
 400
 401         if (var->xres < xres_min)
 402                 var->xres = xres_min;
 403         if (var->yres < yres_min)
 404                 var->yres = yres_min;
 405         if (var->xres > xres_max)
 406                 var->xres = xres_max;
 407         if (var->yres > yres_max)
 408                 var->yres = yres_max;
 409
 410         if (var->xres > var->xres_virtual)
 411                 var->xres = var->xres_virtual;
 412         if (var->yres > var->yres_virtual)
 413                 var->yres = var->yres_virtual;
 414
 415         return 0;
 416 }
 417
 418 static void shrink_height(unsigned long max_frame_size,
 419                 struct fb_var_screeninfo *var)
 420 {
 421         DBG("can't fit FB into memory, reducing y\n");
 422         var->yres_virtual = max_frame_size /
 423                 (var->xres_virtual * var->bits_per_pixel >> 3);
 424
 425         if (var->yres_virtual < OMAPFB_PLANE_YRES_MIN)
 426                 var->yres_virtual = OMAPFB_PLANE_YRES_MIN;
 427
 428         if (var->yres > var->yres_virtual)
 429                 var->yres = var->yres_virtual;
 430 }
 431
 432 static void shrink_width(unsigned long max_frame_size,
 433                 struct fb_var_screeninfo *var)
 434 {
 435         DBG("can't fit FB into memory, reducing x\n");
 436         var->xres_virtual = max_frame_size / var->yres_virtual /
 437                 (var->bits_per_pixel >> 3);
 438
 439         if (var->xres_virtual < OMAPFB_PLANE_XRES_MIN)
 440                 var->xres_virtual = OMAPFB_PLANE_XRES_MIN;
 441
 442         if (var->xres > var->xres_virtual)
 443                 var->xres = var->xres_virtual;
 444 }
 445
 446 static int check_vrfb_fb_size(unsigned long region_size,
 447                 const struct fb_var_screeninfo *var)
 448 {
 449         unsigned long min_phys_size = omap_vrfb_min_phys_size(var->xres_virtual,
 450                 var->yres_virtual, var->bits_per_pixel >> 3);
 451
 452         return min_phys_size > region_size ? -EINVAL : 0;
 453 }
 454
 455 static int check_fb_size(const struct omapfb_info *ofbi,
 456                 struct fb_var_screeninfo *var)
 457 {
 458         unsigned long max_frame_size = ofbi->region->size;
 459         int bytespp = var->bits_per_pixel >> 3;
 460         unsigned long line_size = var->xres_virtual * bytespp;
 461
 462         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 463                 /* One needs to check for both VRFB and OMAPFB limitations. */
 464                 if (check_vrfb_fb_size(max_frame_size, var))
 465                         shrink_height(omap_vrfb_max_height(
 466                                 max_frame_size, var->xres_virtual, bytespp) *
 467                                 line_size, var);
 468
 469                 if (check_vrfb_fb_size(max_frame_size, var)) {
 470                         DBG("cannot fit FB to memory\n");
 471                         return -EINVAL;
 472                 }
 473
 474                 return 0;
 475         }
 476
 477         DBG("max frame size %lu, line size %lu\n", max_frame_size, line_size);
 478
 479         if (line_size * var->yres_virtual > max_frame_size)
 480                 shrink_height(max_frame_size, var);
 481
 482         if (line_size * var->yres_virtual > max_frame_size) {
 483                 shrink_width(max_frame_size, var);
 484                 line_size = var->xres_virtual * bytespp;
 485         }
 486
 487         if (line_size * var->yres_virtual > max_frame_size) {
 488                 DBG("cannot fit FB to memory\n");
 489                 return -EINVAL;
 490         }
 491
 492         return 0;
 493 }
 494
 495 /*
 496  * Consider if VRFB assisted rotation is in use and if the virtual space for
 497  * the zero degree view needs to be mapped. The need for mapping also acts as
 498  * the trigger for setting up the hardware on the context in question. This
 499  * ensures that one does not attempt to access the virtual view before the
 500  * hardware is serving the address translations.
 501  */
 502 static int setup_vrfb_rotation(struct fb_info *fbi)
 503 {
 504         struct omapfb_info *ofbi = FB2OFB(fbi);
 505         struct omapfb2_mem_region *rg = ofbi->region;
 506         struct vrfb *vrfb = &rg->vrfb;
 507         struct fb_var_screeninfo *var = &fbi->var;
 508         struct fb_fix_screeninfo *fix = &fbi->fix;
 509         unsigned bytespp;
 510         bool yuv_mode;
 511         enum omap_color_mode mode;
 512         int r;
 513         bool reconf;
 514
 515         if (!rg->size || ofbi->rotation_type != OMAP_DSS_ROT_VRFB)
 516                 return 0;
 517
 518         DBG("setup_vrfb_rotation\n");
 519
 520         r = fb_mode_to_dss_mode(var, &mode);
 521         if (r)
 522                 return r;
 523
 524         bytespp = var->bits_per_pixel >> 3;
 525
 526         yuv_mode = mode == OMAP_DSS_COLOR_YUV2 || mode == OMAP_DSS_COLOR_UYVY;
 527
 528         /* We need to reconfigure VRFB if the resolution changes, if yuv mode
 529          * is enabled/disabled, or if bytes per pixel changes */
 530
 531         /* XXX we shouldn't allow this when framebuffer is mmapped */
 532
 533         reconf = false;
 534
 535         if (yuv_mode != vrfb->yuv_mode)
 536                 reconf = true;
 537         else if (bytespp != vrfb->bytespp)
 538                 reconf = true;
 539         else if (vrfb->xres != var->xres_virtual ||
 540                         vrfb->yres != var->yres_virtual)
 541                 reconf = true;
 542
 543         if (vrfb->vaddr[0] && reconf) {
 544                 fbi->screen_base = NULL;
 545                 fix->smem_start = 0;
 546                 fix->smem_len = 0;
 547                 iounmap(vrfb->vaddr[0]);
 548                 vrfb->vaddr[0] = NULL;
 549                 DBG("setup_vrfb_rotation: reset fb\n");
 550         }
 551
 552         if (vrfb->vaddr[0])
 553                 return 0;
 554
 555         omap_vrfb_setup(&rg->vrfb, rg->paddr,
 556                         var->xres_virtual,
 557                         var->yres_virtual,
 558                         bytespp, yuv_mode);
 559
 560         /* Now one can ioremap the 0 angle view */
 561         r = omap_vrfb_map_angle(vrfb, var->yres_virtual, 0);
 562         if (r)
 563                 return r;
 564
 565         /* used by open/write in fbmem.c */
 566         fbi->screen_base = ofbi->region->vrfb.vaddr[0];
 567
 568         fix->smem_start = ofbi->region->vrfb.paddr[0];
 569
 570         switch (var->nonstd) {
 571         case OMAPFB_COLOR_YUV422:
 572         case OMAPFB_COLOR_YUY422:
 573                 fix->line_length =
 574                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
 575                 break;
 576         default:
 577                 fix->line_length =
 578                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
 579                 break;
 580         }
 581
 582         fix->smem_len = var->yres_virtual * fix->line_length;
 583
 584         return 0;
 585 }
 586
 587 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
 588                         struct fb_var_screeninfo *var)
 589 {
 590         int i;
 591
 592         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
 593                 struct omapfb_colormode *mode = &omapfb_colormodes[i];
 594                 if (dssmode == mode->dssmode) {
 595                         assign_colormode_to_var(var, mode);
 596                         return 0;
 597                 }
 598         }
 599         return -ENOENT;
 600 }
 601
 602 void set_fb_fix(struct fb_info *fbi)
 603 {
 604         struct fb_fix_screeninfo *fix = &fbi->fix;
 605         struct fb_var_screeninfo *var = &fbi->var;
 606         struct omapfb_info *ofbi = FB2OFB(fbi);
 607         struct omapfb2_mem_region *rg = ofbi->region;
 608
 609         DBG("set_fb_fix\n");
 610
 611         /* used by open/write in fbmem.c */
 612         fbi->screen_base = (char __iomem *)omapfb_get_region_vaddr(ofbi);
 613
 614         /* used by mmap in fbmem.c */
 615         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 616                 switch (var->nonstd) {
 617                 case OMAPFB_COLOR_YUV422:
 618                 case OMAPFB_COLOR_YUY422:
 619                         fix->line_length =
 620                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
 621                         break;
 622                 default:
 623                         fix->line_length =
 624                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
 625                         break;
 626                 }
 627
 628                 fix->smem_len = var->yres_virtual * fix->line_length;
 629         } else {
 630                 fix->line_length =
 631                         (var->xres_virtual * var->bits_per_pixel) >> 3;
 632                 fix->smem_len = rg->size;
 633         }
 634
 635         fix->smem_start = omapfb_get_region_paddr(ofbi);
 636
 637         fix->type = FB_TYPE_PACKED_PIXELS;
 638
 639         if (var->nonstd)
 640                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
 641         else {
 642                 switch (var->bits_per_pixel) {
 643                 case 32:
 644                 case 24:
 645                 case 16:
 646                 case 12:
 647                         fix->visual = FB_VISUAL_TRUECOLOR;
 648                         /* 12bpp is stored in 16 bits */
 649                         break;
 650                 case 1:
 651                 case 2:
 652                 case 4:
 653                 case 8:
 654                         fix->visual = FB_VISUAL_PSEUDOCOLOR;
 655                         break;
 656                 }
 657         }
 658
 659         fix->accel = FB_ACCEL_NONE;
 660
 661         fix->xpanstep = 1;
 662         fix->ypanstep = 1;
 663 }
 664
 665 /* check new var and possibly modify it to be ok */
 666 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
 667 {
 668         struct omapfb_info *ofbi = FB2OFB(fbi);
 669         struct omap_dss_device *display = fb2display(fbi);
 670         enum omap_color_mode mode = 0;
 671         int i;
 672         int r;
 673
 674         DBG("check_fb_var %d\n", ofbi->id);
 675
 676         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 677
 678         r = fb_mode_to_dss_mode(var, &mode);
 679         if (r) {
 680                 DBG("cannot convert var to omap dss mode\n");
 681                 return r;
 682         }
 683
 684         for (i = 0; i < ofbi->num_overlays; ++i) {
 685                 if ((ofbi->overlays[i]->supported_modes & mode) == 0) {
 686                         DBG("invalid mode\n");
 687                         return -EINVAL;
 688                 }
 689         }
 690
 691         if (var->rotate > 3)
 692                 return -EINVAL;
 693
 694         if (check_fb_res_bounds(var))
 695                 return -EINVAL;
 696
 697         /* When no memory is allocated ignore the size check */
 698         if (ofbi->region->size != 0 && check_fb_size(ofbi, var))
 699                 return -EINVAL;
 700
 701         if (var->xres + var->xoffset > var->xres_virtual)
 702                 var->xoffset = var->xres_virtual - var->xres;
 703         if (var->yres + var->yoffset > var->yres_virtual)
 704                 var->yoffset = var->yres_virtual - var->yres;
 705
 706         DBG("xres = %d, yres = %d, vxres = %d, vyres = %d\n",
 707                         var->xres, var->yres,
 708                         var->xres_virtual, var->yres_virtual);
 709
 710         if (display && display->driver->get_dimensions) {
 711                 u32 w, h;
 712                 display->driver->get_dimensions(display, &w, &h);
 713                 var->width = DIV_ROUND_CLOSEST(w, 1000);
 714                 var->height = DIV_ROUND_CLOSEST(h, 1000);
 715         } else {
 716                 var->height = -1;
 717                 var->width = -1;
 718         }
 719
 720         var->grayscale          = 0;
 721
 722         if (display && display->driver->get_timings) {
 723                 struct omap_video_timings timings;
 724                 display->driver->get_timings(display, &timings);
 725
 726                 /* pixclock in ps, the rest in pixclock */
 727                 var->pixclock = timings.pixel_clock != 0 ?
 728                         KHZ2PICOS(timings.pixel_clock) :
 729                         0;
 730                 var->left_margin = timings.hbp;
 731                 var->right_margin = timings.hfp;
 732                 var->upper_margin = timings.vbp;
 733                 var->lower_margin = timings.vfp;
 734                 var->hsync_len = timings.hsw;
 735                 var->vsync_len = timings.vsw;
 736         } else {
 737                 var->pixclock = 0;
 738                 var->left_margin = 0;
 739                 var->right_margin = 0;
 740                 var->upper_margin = 0;
 741                 var->lower_margin = 0;
 742                 var->hsync_len = 0;
 743                 var->vsync_len = 0;
 744         }
 745
 746         /* TODO: get these from panel->config */
 747         var->vmode              = FB_VMODE_NONINTERLACED;
 748         var->sync               = 0;
 749
 750         return 0;
 751 }
 752
 753 /*
 754  * ---------------------------------------------------------------------------
 755  * fbdev framework callbacks
 756  * ---------------------------------------------------------------------------
 757  */
 758 static int omapfb_open(struct fb_info *fbi, int user)
 759 {
 760         return 0;
 761 }
 762
 763 static int omapfb_release(struct fb_info *fbi, int user)
 764 {
 765         return 0;
 766 }
 767
 768 static unsigned calc_rotation_offset_dma(const struct fb_var_screeninfo *var,
 769                 const struct fb_fix_screeninfo *fix, int rotation)
 770 {
 771         unsigned offset;
 772
 773         offset = var->yoffset * fix->line_length +
 774                 var->xoffset * (var->bits_per_pixel >> 3);
 775
 776         return offset;
 777 }
 778
 779 static unsigned calc_rotation_offset_vrfb(const struct fb_var_screeninfo *var,
 780                 const struct fb_fix_screeninfo *fix, int rotation)
 781 {
 782         unsigned offset;
 783
 784         if (rotation == FB_ROTATE_UD)
 785                 offset = (var->yres_virtual - var->yres) *
 786                         fix->line_length;
 787         else if (rotation == FB_ROTATE_CW)
 788                 offset = (var->yres_virtual - var->yres) *
 789                         (var->bits_per_pixel >> 3);
 790         else
 791                 offset = 0;
 792
 793         if (rotation == FB_ROTATE_UR)
 794                 offset += var->yoffset * fix->line_length +
 795                         var->xoffset * (var->bits_per_pixel >> 3);
 796         else if (rotation == FB_ROTATE_UD)
 797                 offset -= var->yoffset * fix->line_length +
 798                         var->xoffset * (var->bits_per_pixel >> 3);
 799         else if (rotation == FB_ROTATE_CW)
 800                 offset -= var->xoffset * fix->line_length +
 801                         var->yoffset * (var->bits_per_pixel >> 3);
 802         else if (rotation == FB_ROTATE_CCW)
 803                 offset += var->xoffset * fix->line_length +
 804                         var->yoffset * (var->bits_per_pixel >> 3);
 805
 806         return offset;
 807 }
 808
 809 static void omapfb_calc_addr(const struct omapfb_info *ofbi,
 810                              const struct fb_var_screeninfo *var,
 811                              const struct fb_fix_screeninfo *fix,
 812                              int rotation, u32 *paddr)
 813 {
 814         u32 data_start_p;
 815         int offset;
 816
 817         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 818                 data_start_p = omapfb_get_region_rot_paddr(ofbi, rotation);
 819         else
 820                 data_start_p = omapfb_get_region_paddr(ofbi);
 821
 822         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 823                 offset = calc_rotation_offset_vrfb(var, fix, rotation);
 824         else
 825                 offset = calc_rotation_offset_dma(var, fix, rotation);
 826
 827         data_start_p += offset;
 828
 829         if (offset)
 830                 DBG("offset %d, %d = %d\n",
 831                     var->xoffset, var->yoffset, offset);
 832
 833         DBG("paddr %x\n", data_start_p);
 834
 835         *paddr = data_start_p;
 836 }
 837
 838 /* setup overlay according to the fb */
 839 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 840                 u16 posx, u16 posy, u16 outw, u16 outh)
 841 {
 842         int r = 0;
 843         struct omapfb_info *ofbi = FB2OFB(fbi);
 844         struct fb_var_screeninfo *var = &fbi->var;
 845         struct fb_fix_screeninfo *fix = &fbi->fix;
 846         enum omap_color_mode mode = 0;
 847         u32 data_start_p = 0;
 848         struct omap_overlay_info info;
 849         int xres, yres;
 850         int screen_width;
 851         int mirror;
 852         int rotation = var->rotate;
 853         int i;
 854
 855         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 856
 857         for (i = 0; i < ofbi->num_overlays; i++) {
 858                 if (ovl != ofbi->overlays[i])
 859                         continue;
 860
 861                 rotation = (rotation + ofbi->rotation[i]) % 4;
 862                 break;
 863         }
 864
 865         DBG("setup_overlay %d, posx %d, posy %d, outw %d, outh %d\n", ofbi->id,
 866                         posx, posy, outw, outh);
 867
 868         if (rotation == FB_ROTATE_CW || rotation == FB_ROTATE_CCW) {
 869                 xres = var->yres;
 870                 yres = var->xres;
 871         } else {
 872                 xres = var->xres;
 873                 yres = var->yres;
 874         }
 875
 876         if (ofbi->region->size)
 877                 omapfb_calc_addr(ofbi, var, fix, rotation, &data_start_p);
 878
 879         r = fb_mode_to_dss_mode(var, &mode);
 880         if (r) {
 881                 DBG("fb_mode_to_dss_mode failed");
 882                 goto err;
 883         }
 884
 885         switch (var->nonstd) {
 886         case OMAPFB_COLOR_YUV422:
 887         case OMAPFB_COLOR_YUY422:
 888                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
 889                         screen_width = fix->line_length
 890                                 / (var->bits_per_pixel >> 2);
 891                         break;
 892                 }
 893         default:
 894                 screen_width = fix->line_length / (var->bits_per_pixel >> 3);
 895                 break;
 896         }
 897
 898         ovl->get_overlay_info(ovl, &info);
 899
 900         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
 901                 mirror = 0;
 902         else
 903                 mirror = ofbi->mirror;
 904
 905         info.paddr = data_start_p;
 906         info.screen_width = screen_width;
 907         info.width = xres;
 908         info.height = yres;
 909         info.color_mode = mode;
 910         info.rotation_type = ofbi->rotation_type;
 911         info.rotation = rotation;
 912         info.mirror = mirror;
 913
 914         info.pos_x = posx;
 915         info.pos_y = posy;
 916         info.out_width = outw;
 917         info.out_height = outh;
 918
 919         r = ovl->set_overlay_info(ovl, &info);
 920         if (r) {
 921                 DBG("ovl->setup_overlay_info failed\n");
 922                 goto err;
 923         }
 924
 925         return 0;
 926
 927 err:
 928         DBG("setup_overlay failed\n");
 929         return r;
 930 }
 931
 932 /* apply var to the overlay */
 933 int omapfb_apply_changes(struct fb_info *fbi, int init)
 934 {
 935         int r = 0;
 936         struct omapfb_info *ofbi = FB2OFB(fbi);
 937         struct fb_var_screeninfo *var = &fbi->var;
 938         struct omap_overlay *ovl;
 939         u16 posx, posy;
 940         u16 outw, outh;
 941         int i;
 942
 943 #ifdef DEBUG
 944         if (omapfb_test_pattern)
 945                 fill_fb(fbi);
 946 #endif
 947
 948         WARN_ON(!atomic_read(&ofbi->region->lock_count));
 949
 950         for (i = 0; i < ofbi->num_overlays; i++) {
 951                 ovl = ofbi->overlays[i];
 952
 953                 DBG("apply_changes, fb %d, ovl %d\n", ofbi->id, ovl->id);
 954
 955                 if (ofbi->region->size == 0) {
 956                         /* the fb is not available. disable the overlay */
 957                         omapfb_overlay_enable(ovl, 0);
 958                         if (!init && ovl->manager)
 959                                 ovl->manager->apply(ovl->manager);
 960                         continue;
 961                 }
 962
 963                 if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 964                         int rotation = (var->rotate + ofbi->rotation[i]) % 4;
 965                         if (rotation == FB_ROTATE_CW ||
 966                                         rotation == FB_ROTATE_CCW) {
 967                                 outw = var->yres;
 968                                 outh = var->xres;
 969                         } else {
 970                                 outw = var->xres;
 971                                 outh = var->yres;
 972                         }
 973                 } else {
 974                         outw = ovl->info.out_width;
 975                         outh = ovl->info.out_height;
 976                 }
 977
 978                 if (init) {
 979                         posx = 0;
 980                         posy = 0;
 981                 } else {
 982                         posx = ovl->info.pos_x;
 983                         posy = ovl->info.pos_y;
 984                 }
 985
 986                 r = omapfb_setup_overlay(fbi, ovl, posx, posy, outw, outh);
 987                 if (r)
 988                         goto err;
 989
 990                 if (!init && ovl->manager)
 991                         ovl->manager->apply(ovl->manager);
 992         }
 993         return 0;
 994 err:
 995         DBG("apply_changes failed\n");
 996         return r;
 997 }
 998
 999 /* checks var and eventually tweaks it to something supported,
1000  * DO NOT MODIFY PAR */
1001 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
1002 {
1003         struct omapfb_info *ofbi = FB2OFB(fbi);
1004         int r;
1005
1006         DBG("check_var(%d)\n", FB2OFB(fbi)->id);
1007
1008         omapfb_get_mem_region(ofbi->region);
1009
1010         r = check_fb_var(fbi, var);
1011
1012         omapfb_put_mem_region(ofbi->region);
1013
1014         return r;
1015 }
1016
1017 /* set the video mode according to info->var */
1018 static int omapfb_set_par(struct fb_info *fbi)
1019 {
1020         struct omapfb_info *ofbi = FB2OFB(fbi);
1021         int r;
1022
1023         DBG("set_par(%d)\n", FB2OFB(fbi)->id);
1024
1025         omapfb_get_mem_region(ofbi->region);
1026
1027         set_fb_fix(fbi);
1028
1029         r = setup_vrfb_rotation(fbi);
1030         if (r)
1031                 goto out;
1032
1033         r = omapfb_apply_changes(fbi, 0);
1034
1035  out:
1036         omapfb_put_mem_region(ofbi->region);
1037
1038         return r;
1039 }
1040
1041 static int omapfb_pan_display(struct fb_var_screeninfo *var,
1042                 struct fb_info *fbi)
1043 {
1044         struct omapfb_info *ofbi = FB2OFB(fbi);
1045         struct fb_var_screeninfo new_var;
1046         int r;
1047
1048         DBG("pan_display(%d)\n", FB2OFB(fbi)->id);
1049
1050         if (var->xoffset == fbi->var.xoffset &&
1051             var->yoffset == fbi->var.yoffset)
1052                 return 0;
1053
1054         new_var = fbi->var;
1055         new_var.xoffset = var->xoffset;
1056         new_var.yoffset = var->yoffset;
1057
1058         fbi->var = new_var;
1059
1060         omapfb_get_mem_region(ofbi->region);
1061
1062         r = omapfb_apply_changes(fbi, 0);
1063
1064         omapfb_put_mem_region(ofbi->region);
1065
1066         return r;
1067 }
1068
1069 static void mmap_user_open(struct vm_area_struct *vma)
1070 {
1071         struct omapfb2_mem_region *rg = vma->vm_private_data;
1072
1073         omapfb_get_mem_region(rg);
1074         atomic_inc(&rg->map_count);
1075         omapfb_put_mem_region(rg);
1076 }
1077
1078 static void mmap_user_close(struct vm_area_struct *vma)
1079 {
1080         struct omapfb2_mem_region *rg = vma->vm_private_data;
1081
1082         omapfb_get_mem_region(rg);
1083         atomic_dec(&rg->map_count);
1084         omapfb_put_mem_region(rg);
1085 }
1086
1087 static struct vm_operations_struct mmap_user_ops = {
1088         .open = mmap_user_open,
1089         .close = mmap_user_close,
1090 };
1091
1092 static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
1093 {
1094         struct omapfb_info *ofbi = FB2OFB(fbi);
1095         struct fb_fix_screeninfo *fix = &fbi->fix;
1096         struct omapfb2_mem_region *rg;
1097         unsigned long off;
1098         unsigned long start;
1099         u32 len;
1100         int r = -EINVAL;
1101
1102         if (vma->vm_end - vma->vm_start == 0)
1103                 return 0;
1104         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1105                 return -EINVAL;
1106         off = vma->vm_pgoff << PAGE_SHIFT;
1107
1108         rg = omapfb_get_mem_region(ofbi->region);
1109
1110         start = omapfb_get_region_paddr(ofbi);
1111         len = fix->smem_len;
1112         if (off >= len)
1113                 goto error;
1114         if ((vma->vm_end - vma->vm_start + off) > len)
1115                 goto error;
1116
1117         off += start;
1118
1119         DBG("user mmap region start %lx, len %d, off %lx\n", start, len, off);
1120
1121         vma->vm_pgoff = off >> PAGE_SHIFT;
1122         vma->vm_flags |= VM_IO | VM_RESERVED;
1123         if (def_vram_cache)
1124                 vma->vm_page_prot = pgprot_writethrough(vma->vm_page_prot);
1125         else
1126                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1127         vma->vm_ops = &mmap_user_ops;
1128         vma->vm_private_data = rg;
1129         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1130                                vma->vm_end - vma->vm_start,
1131                                vma->vm_page_prot)) {
1132                 r = -EAGAIN;
1133                 goto error;
1134         }
1135
1136         /* vm_ops.open won't be called for mmap itself. */
1137         atomic_inc(&rg->map_count);
1138
1139         omapfb_put_mem_region(rg);
1140
1141         return 0;
1142
1143  error:
1144         omapfb_put_mem_region(ofbi->region);
1145
1146         return r;
1147 }
1148
1149 /* Store a single color palette entry into a pseudo palette or the hardware
1150  * palette if one is available. For now we support only 16bpp and thus store
1151  * the entry only to the pseudo palette.
1152  */
1153 static int _setcolreg(struct fb_info *fbi, u_int regno, u_int red, u_int green,
1154                 u_int blue, u_int transp, int update_hw_pal)
1155 {
1156         /*struct omapfb_info *ofbi = FB2OFB(fbi);*/
1157         /*struct omapfb2_device *fbdev = ofbi->fbdev;*/
1158         struct fb_var_screeninfo *var = &fbi->var;
1159         int r = 0;
1160
1161         enum omapfb_color_format mode = OMAPFB_COLOR_RGB24U; /* XXX */
1162
1163         /*switch (plane->color_mode) {*/
1164         switch (mode) {
1165         case OMAPFB_COLOR_YUV422:
1166         case OMAPFB_COLOR_YUV420:
1167         case OMAPFB_COLOR_YUY422:
1168                 r = -EINVAL;
1169                 break;
1170         case OMAPFB_COLOR_CLUT_8BPP:
1171         case OMAPFB_COLOR_CLUT_4BPP:
1172         case OMAPFB_COLOR_CLUT_2BPP:
1173         case OMAPFB_COLOR_CLUT_1BPP:
1174                 /*
1175                    if (fbdev->ctrl->setcolreg)
1176                    r = fbdev->ctrl->setcolreg(regno, red, green, blue,
1177                    transp, update_hw_pal);
1178                    */
1179                 /* Fallthrough */
1180                 r = -EINVAL;
1181                 break;
1182         case OMAPFB_COLOR_RGB565:
1183         case OMAPFB_COLOR_RGB444:
1184         case OMAPFB_COLOR_RGB24P:
1185         case OMAPFB_COLOR_RGB24U:
1186                 if (r != 0)
1187                         break;
1188
1189                 if (regno < 16) {
1190                         u32 pal;
1191                         pal = ((red >> (16 - var->red.length)) <<
1192                                         var->red.offset) |
1193                                 ((green >> (16 - var->green.length)) <<
1194                                  var->green.offset) |
1195                                 (blue >> (16 - var->blue.length));
1196                         ((u32 *)(fbi->pseudo_palette))[regno] = pal;
1197                 }
1198                 break;
1199         default:
1200                 BUG();
1201         }
1202         return r;
1203 }
1204
1205 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
1206                 u_int transp, struct fb_info *info)
1207 {
1208         DBG("setcolreg\n");
1209
1210         return _setcolreg(info, regno, red, green, blue, transp, 1);
1211 }
1212
1213 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1214 {
1215         int count, index, r;
1216         u16 *red, *green, *blue, *transp;
1217         u16 trans = 0xffff;
1218
1219         DBG("setcmap\n");
1220
1221         red     = cmap->red;
1222         green   = cmap->green;
1223         blue    = cmap->blue;
1224         transp  = cmap->transp;
1225         index   = cmap->start;
1226
1227         for (count = 0; count < cmap->len; count++) {
1228                 if (transp)
1229                         trans = *transp++;
1230                 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
1231                                 count == cmap->len - 1);
1232                 if (r != 0)
1233                         return r;
1234         }
1235
1236         return 0;
1237 }
1238
1239 static int omapfb_blank(int blank, struct fb_info *fbi)
1240 {
1241         struct omapfb_info *ofbi = FB2OFB(fbi);
1242         struct omapfb2_device *fbdev = ofbi->fbdev;
1243         struct omap_dss_device *display = fb2display(fbi);
1244         struct omapfb_display_data *d;
1245         int r = 0;
1246
1247         if (!display)
1248                 return -EINVAL;
1249
1250         omapfb_lock(fbdev);
1251
1252         d = get_display_data(fbdev, display);
1253
1254         switch (blank) {
1255         case FB_BLANK_UNBLANK:
1256                 if (display->state != OMAP_DSS_DISPLAY_SUSPENDED)
1257                         goto exit;
1258
1259                 if (display->driver->resume)
1260                         r = display->driver->resume(display);
1261
1262                 if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
1263                                 d->update_mode == OMAPFB_AUTO_UPDATE &&
1264                                 !d->auto_update_work_enabled)
1265                         omapfb_start_auto_update(fbdev, display);
1266
1267                 break;
1268
1269         case FB_BLANK_NORMAL:
1270                 /* FB_BLANK_NORMAL could be implemented.
1271                  * Needs DSS additions. */
1272         case FB_BLANK_VSYNC_SUSPEND:
1273         case FB_BLANK_HSYNC_SUSPEND:
1274         case FB_BLANK_POWERDOWN:
1275                 if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
1276                         goto exit;
1277
1278                 if (d->auto_update_work_enabled)
1279                         omapfb_stop_auto_update(fbdev, display);
1280
1281                 if (display->driver->suspend)
1282                         r = display->driver->suspend(display);
1283
1284                 break;
1285
1286         default:
1287                 r = -EINVAL;
1288         }
1289
1290 exit:
1291         omapfb_unlock(fbdev);
1292
1293         return r;
1294 }
1295
1296 #if 0
1297 /* XXX fb_read and fb_write are needed for VRFB */
1298 ssize_t omapfb_write(struct fb_info *info, const char __user *buf,
1299                 size_t count, loff_t *ppos)
1300 {
1301         DBG("omapfb_write %d, %lu\n", count, (unsigned long)*ppos);
1302         /* XXX needed for VRFB */
1303         return count;
1304 }
1305 #endif
1306
1307 static struct fb_ops omapfb_ops = {
1308         .owner          = THIS_MODULE,
1309         .fb_open        = omapfb_open,
1310         .fb_release     = omapfb_release,
1311         .fb_fillrect    = cfb_fillrect,
1312         .fb_copyarea    = cfb_copyarea,
1313         .fb_imageblit   = cfb_imageblit,
1314         .fb_blank       = omapfb_blank,
1315         .fb_ioctl       = omapfb_ioctl,
1316         .fb_check_var   = omapfb_check_var,
1317         .fb_set_par     = omapfb_set_par,
1318         .fb_pan_display = omapfb_pan_display,
1319         .fb_mmap        = omapfb_mmap,
1320         .fb_setcolreg   = omapfb_setcolreg,
1321         .fb_setcmap     = omapfb_setcmap,
1322         /*.fb_write     = omapfb_write,*/
1323 };
1324
1325 static void omapfb_free_fbmem(struct fb_info *fbi)
1326 {
1327         struct omapfb_info *ofbi = FB2OFB(fbi);
1328         struct omapfb2_device *fbdev = ofbi->fbdev;
1329         struct omapfb2_mem_region *rg;
1330
1331         rg = ofbi->region;
1332
1333         if (rg->token == NULL)
1334                 return;
1335
1336         WARN_ON(atomic_read(&rg->map_count));
1337
1338         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1339                 /* unmap the 0 angle rotation */
1340                 if (rg->vrfb.vaddr[0]) {
1341                         iounmap(rg->vrfb.vaddr[0]);
1342                         rg->vrfb.vaddr[0] = NULL;
1343                 }
1344
1345                 omap_vrfb_release_ctx(&rg->vrfb);
1346         }
1347
1348         dma_free_attrs(fbdev->dev, rg->size, rg->token, rg->dma_handle,
1349                         &rg->attrs);
1350
1351         rg->token = NULL;
1352         rg->vaddr = NULL;
1353         rg->paddr = 0;
1354         rg->alloc = 0;
1355         rg->size = 0;
1356 }
1357
1358 static void clear_fb_info(struct fb_info *fbi)
1359 {
1360         memset(&fbi->var, 0, sizeof(fbi->var));
1361         memset(&fbi->fix, 0, sizeof(fbi->fix));
1362         strlcpy(fbi->fix.id, MODULE_NAME, sizeof(fbi->fix.id));
1363 }
1364
1365 static int omapfb_free_all_fbmem(struct omapfb2_device *fbdev)
1366 {
1367         int i;
1368
1369         DBG("free all fbmem\n");
1370
1371         for (i = 0; i < fbdev->num_fbs; i++) {
1372                 struct fb_info *fbi = fbdev->fbs[i];
1373                 omapfb_free_fbmem(fbi);
1374                 clear_fb_info(fbi);
1375         }
1376
1377         return 0;
1378 }
1379
1380 static int omapfb_alloc_fbmem(struct fb_info *fbi, unsigned long size,
1381                 unsigned long paddr)
1382 {
1383         struct omapfb_info *ofbi = FB2OFB(fbi);
1384         struct omapfb2_device *fbdev = ofbi->fbdev;
1385         struct omapfb2_mem_region *rg;
1386         void *token;
1387         DEFINE_DMA_ATTRS(attrs);
1388         dma_addr_t dma_handle;
1389         int r;
1390
1391         rg = ofbi->region;
1392
1393         rg->paddr = 0;
1394         rg->vaddr = NULL;
1395         memset(&rg->vrfb, 0, sizeof rg->vrfb);
1396         rg->size = 0;
1397         rg->type = 0;
1398         rg->alloc = false;
1399         rg->map = false;
1400
1401         size = PAGE_ALIGN(size);
1402
1403         WARN_ONCE(paddr,
1404                 "reserving memory at predefined address not supported\n");
1405
1406         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
1407
1408         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
1409                 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
1410
1411         DBG("allocating %lu bytes for fb %d\n", size, ofbi->id);
1412
1413         token = dma_alloc_attrs(fbdev->dev, size, &dma_handle,
1414                         GFP_KERNEL, &attrs);
1415
1416         if (token == NULL) {
1417                 dev_err(fbdev->dev, "failed to allocate framebuffer\n");
1418                 return -ENOMEM;
1419         }
1420
1421         DBG("allocated VRAM paddr %lx, vaddr %p\n",
1422                         (unsigned long)dma_handle, token);
1423
1424         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1425                 r = omap_vrfb_request_ctx(&rg->vrfb);
1426                 if (r) {
1427                         dma_free_attrs(fbdev->dev, size, token, dma_handle,
1428                                         &attrs);
1429                         dev_err(fbdev->dev, "vrfb create ctx failed\n");
1430                         return r;
1431                 }
1432         }
1433
1434         rg->attrs = attrs;
1435         rg->token = token;
1436         rg->dma_handle = dma_handle;
1437
1438         rg->paddr = (unsigned long)dma_handle;
1439         rg->vaddr = (void __iomem *)token;
1440         rg->size = size;
1441         rg->alloc = 1;
1442
1443         return 0;
1444 }
1445
1446 /* allocate fbmem using display resolution as reference */
1447 static int omapfb_alloc_fbmem_display(struct fb_info *fbi, unsigned long size,
1448                 unsigned long paddr)
1449 {
1450         struct omapfb_info *ofbi = FB2OFB(fbi);
1451         struct omapfb2_device *fbdev = ofbi->fbdev;
1452         struct omap_dss_device *display;
1453         int bytespp;
1454
1455         display =  fb2display(fbi);
1456
1457         if (!display)
1458                 return 0;
1459
1460         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1461         case 16:
1462                 bytespp = 2;
1463                 break;
1464         case 24:
1465                 bytespp = 4;
1466                 break;
1467         default:
1468                 bytespp = 4;
1469                 break;
1470         }
1471
1472         if (!size) {
1473                 u16 w, h;
1474
1475                 display->driver->get_resolution(display, &w, &h);
1476
1477                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1478                         size = max(omap_vrfb_min_phys_size(w, h, bytespp),
1479                                         omap_vrfb_min_phys_size(h, w, bytespp));
1480
1481                         DBG("adjusting fb mem size for VRFB, %u -> %lu\n",
1482                                         w * h * bytespp, size);
1483                 } else {
1484                         size = w * h * bytespp;
1485                 }
1486         }
1487
1488         if (!size)
1489                 return 0;
1490
1491         return omapfb_alloc_fbmem(fbi, size, paddr);
1492 }
1493
1494 static enum omap_color_mode fb_format_to_dss_mode(enum omapfb_color_format fmt)
1495 {
1496         enum omap_color_mode mode;
1497
1498         switch (fmt) {
1499         case OMAPFB_COLOR_RGB565:
1500                 mode = OMAP_DSS_COLOR_RGB16;
1501                 break;
1502         case OMAPFB_COLOR_YUV422:
1503                 mode = OMAP_DSS_COLOR_YUV2;
1504                 break;
1505         case OMAPFB_COLOR_CLUT_8BPP:
1506                 mode = OMAP_DSS_COLOR_CLUT8;
1507                 break;
1508         case OMAPFB_COLOR_CLUT_4BPP:
1509                 mode = OMAP_DSS_COLOR_CLUT4;
1510                 break;
1511         case OMAPFB_COLOR_CLUT_2BPP:
1512                 mode = OMAP_DSS_COLOR_CLUT2;
1513                 break;
1514         case OMAPFB_COLOR_CLUT_1BPP:
1515                 mode = OMAP_DSS_COLOR_CLUT1;
1516                 break;
1517         case OMAPFB_COLOR_RGB444:
1518                 mode = OMAP_DSS_COLOR_RGB12U;
1519                 break;
1520         case OMAPFB_COLOR_YUY422:
1521                 mode = OMAP_DSS_COLOR_UYVY;
1522                 break;
1523         case OMAPFB_COLOR_ARGB16:
1524                 mode = OMAP_DSS_COLOR_ARGB16;
1525                 break;
1526         case OMAPFB_COLOR_RGB24U:
1527                 mode = OMAP_DSS_COLOR_RGB24U;
1528                 break;
1529         case OMAPFB_COLOR_RGB24P:
1530                 mode = OMAP_DSS_COLOR_RGB24P;
1531                 break;
1532         case OMAPFB_COLOR_ARGB32:
1533                 mode = OMAP_DSS_COLOR_ARGB32;
1534                 break;
1535         case OMAPFB_COLOR_RGBA32:
1536                 mode = OMAP_DSS_COLOR_RGBA32;
1537                 break;
1538         case OMAPFB_COLOR_RGBX32:
1539                 mode = OMAP_DSS_COLOR_RGBX32;
1540                 break;
1541         default:
1542                 mode = -EINVAL;
1543         }
1544
1545         return mode;
1546 }
1547
1548 static int omapfb_parse_vram_param(const char *param, int max_entries,
1549                 unsigned long *sizes, unsigned long *paddrs)
1550 {
1551         int fbnum;
1552         unsigned long size;
1553         unsigned long paddr = 0;
1554         char *p, *start;
1555
1556         start = (char *)param;
1557
1558         while (1) {
1559                 p = start;
1560
1561                 fbnum = simple_strtoul(p, &p, 10);
1562
1563                 if (p == param)
1564                         return -EINVAL;
1565
1566                 if (*p != ':')
1567                         return -EINVAL;
1568
1569                 if (fbnum >= max_entries)
1570                         return -EINVAL;
1571
1572                 size = memparse(p + 1, &p);
1573
1574                 if (!size)
1575                         return -EINVAL;
1576
1577                 paddr = 0;
1578
1579                 if (*p == '@') {
1580                         paddr = simple_strtoul(p + 1, &p, 16);
1581
1582                         if (!paddr)
1583                                 return -EINVAL;
1584
1585                 }
1586
1587                 paddrs[fbnum] = paddr;
1588                 sizes[fbnum] = size;
1589
1590                 if (*p == 0)
1591                         break;
1592
1593                 if (*p != ',')
1594                         return -EINVAL;
1595
1596                 ++p;
1597
1598                 start = p;
1599         }
1600
1601         return 0;
1602 }
1603
1604 static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
1605 {
1606         int i, r;
1607         unsigned long vram_sizes[10];
1608         unsigned long vram_paddrs[10];
1609
1610         memset(&vram_sizes, 0, sizeof(vram_sizes));
1611         memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1612
1613         if (def_vram && omapfb_parse_vram_param(def_vram, 10,
1614                                 vram_sizes, vram_paddrs)) {
1615                 dev_err(fbdev->dev, "failed to parse vram parameter\n");
1616
1617                 memset(&vram_sizes, 0, sizeof(vram_sizes));
1618                 memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1619         }
1620
1621         if (fbdev->dev->platform_data) {
1622                 struct omapfb_platform_data *opd;
1623                 opd = fbdev->dev->platform_data;
1624                 for (i = 0; i < opd->mem_desc.region_cnt; ++i) {
1625                         if (!vram_sizes[i]) {
1626                                 unsigned long size;
1627                                 unsigned long paddr;
1628
1629                                 size = opd->mem_desc.region[i].size;
1630                                 paddr = opd->mem_desc.region[i].paddr;
1631
1632                                 vram_sizes[i] = size;
1633                                 vram_paddrs[i] = paddr;
1634                         }
1635                 }
1636         }
1637
1638         for (i = 0; i < fbdev->num_fbs; i++) {
1639                 /* allocate memory automatically only for fb0, or if
1640                  * excplicitly defined with vram or plat data option */
1641                 if (i == 0 || vram_sizes[i] != 0) {
1642                         r = omapfb_alloc_fbmem_display(fbdev->fbs[i],
1643                                         vram_sizes[i], vram_paddrs[i]);
1644
1645                         if (r)
1646                                 return r;
1647                 }
1648         }
1649
1650         for (i = 0; i < fbdev->num_fbs; i++) {
1651                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1652                 struct omapfb2_mem_region *rg;
1653                 rg = ofbi->region;
1654
1655                 DBG("region%d phys %08x virt %p size=%lu\n",
1656                                 i,
1657                                 rg->paddr,
1658                                 rg->vaddr,
1659                                 rg->size);
1660         }
1661
1662         return 0;
1663 }
1664
1665 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
1666 {
1667         struct omapfb_info *ofbi = FB2OFB(fbi);
1668         struct omapfb2_device *fbdev = ofbi->fbdev;
1669         struct omap_dss_device *display = fb2display(fbi);
1670         struct omapfb2_mem_region *rg = ofbi->region;
1671         unsigned long old_size = rg->size;
1672         unsigned long old_paddr = rg->paddr;
1673         int old_type = rg->type;
1674         int r;
1675
1676         if (type > OMAPFB_MEMTYPE_MAX)
1677                 return -EINVAL;
1678
1679         size = PAGE_ALIGN(size);
1680
1681         if (old_size == size && old_type == type)
1682                 return 0;
1683
1684         if (display && display->driver->sync)
1685                         display->driver->sync(display);
1686
1687         omapfb_free_fbmem(fbi);
1688
1689         if (size == 0) {
1690                 clear_fb_info(fbi);
1691                 return 0;
1692         }
1693
1694         r = omapfb_alloc_fbmem(fbi, size, 0);
1695
1696         if (r) {
1697                 if (old_size)
1698                         omapfb_alloc_fbmem(fbi, old_size, old_paddr);
1699
1700                 if (rg->size == 0)
1701                         clear_fb_info(fbi);
1702
1703                 return r;
1704         }
1705
1706         if (old_size == size)
1707                 return 0;
1708
1709         if (old_size == 0) {
1710                 DBG("initializing fb %d\n", ofbi->id);
1711                 r = omapfb_fb_init(fbdev, fbi);
1712                 if (r) {
1713                         DBG("omapfb_fb_init failed\n");
1714                         goto err;
1715                 }
1716                 r = omapfb_apply_changes(fbi, 1);
1717                 if (r) {
1718                         DBG("omapfb_apply_changes failed\n");
1719                         goto err;
1720                 }
1721         } else {
1722                 struct fb_var_screeninfo new_var;
1723                 memcpy(&new_var, &fbi->var, sizeof(new_var));
1724                 r = check_fb_var(fbi, &new_var);
1725                 if (r)
1726                         goto err;
1727                 memcpy(&fbi->var, &new_var, sizeof(fbi->var));
1728                 set_fb_fix(fbi);
1729                 r = setup_vrfb_rotation(fbi);
1730                 if (r)
1731                         goto err;
1732         }
1733
1734         return 0;
1735 err:
1736         omapfb_free_fbmem(fbi);
1737         clear_fb_info(fbi);
1738         return r;
1739 }
1740
1741 static void omapfb_auto_update_work(struct work_struct *work)
1742 {
1743         struct omap_dss_device *dssdev;
1744         struct omap_dss_driver *dssdrv;
1745         struct omapfb_display_data *d;
1746         u16 w, h;
1747         unsigned int freq;
1748         struct omapfb2_device *fbdev;
1749
1750         d = container_of(work, struct omapfb_display_data,
1751                         auto_update_work.work);
1752
1753         dssdev = d->dssdev;
1754         dssdrv = dssdev->driver;
1755         fbdev = d->fbdev;
1756
1757         if (!dssdrv || !dssdrv->update)
1758                 return;
1759
1760         if (dssdrv->sync)
1761                 dssdrv->sync(dssdev);
1762
1763         dssdrv->get_resolution(dssdev, &w, &h);
1764         dssdrv->update(dssdev, 0, 0, w, h);
1765
1766         freq = auto_update_freq;
1767         if (freq == 0)
1768                 freq = 20;
1769         queue_delayed_work(fbdev->auto_update_wq,
1770                         &d->auto_update_work, HZ / freq);
1771 }
1772
1773 void omapfb_start_auto_update(struct omapfb2_device *fbdev,
1774                 struct omap_dss_device *display)
1775 {
1776         struct omapfb_display_data *d;
1777
1778         if (fbdev->auto_update_wq == NULL) {
1779                 struct workqueue_struct *wq;
1780
1781                 wq = create_singlethread_workqueue("omapfb_auto_update");
1782
1783                 if (wq == NULL) {
1784                         dev_err(fbdev->dev, "Failed to create workqueue for "
1785                                         "auto-update\n");
1786                         return;
1787                 }
1788
1789                 fbdev->auto_update_wq = wq;
1790         }
1791
1792         d = get_display_data(fbdev, display);
1793
1794         INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
1795
1796         d->auto_update_work_enabled = true;
1797
1798         omapfb_auto_update_work(&d->auto_update_work.work);
1799 }
1800
1801 void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
1802                 struct omap_dss_device *display)
1803 {
1804         struct omapfb_display_data *d;
1805
1806         d = get_display_data(fbdev, display);
1807
1808         cancel_delayed_work_sync(&d->auto_update_work);
1809
1810         d->auto_update_work_enabled = false;
1811 }
1812
1813 /* initialize fb_info, var, fix to something sane based on the display */
1814 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
1815 {
1816         struct fb_var_screeninfo *var = &fbi->var;
1817         struct omap_dss_device *display = fb2display(fbi);
1818         struct omapfb_info *ofbi = FB2OFB(fbi);
1819         int r = 0;
1820
1821         fbi->fbops = &omapfb_ops;
1822         fbi->flags = FBINFO_FLAG_DEFAULT;
1823         fbi->pseudo_palette = fbdev->pseudo_palette;
1824
1825         if (ofbi->region->size == 0) {
1826                 clear_fb_info(fbi);
1827                 return 0;
1828         }
1829
1830         var->nonstd = 0;
1831         var->bits_per_pixel = 0;
1832
1833         var->rotate = def_rotate;
1834
1835         /*
1836          * Check if there is a default color format set in the board file,
1837          * and use this format instead the default deducted from the
1838          * display bpp.
1839          */
1840         if (fbdev->dev->platform_data) {
1841                 struct omapfb_platform_data *opd;
1842                 int id = ofbi->id;
1843
1844                 opd = fbdev->dev->platform_data;
1845                 if (opd->mem_desc.region[id].format_used) {
1846                         enum omap_color_mode mode;
1847                         enum omapfb_color_format format;
1848
1849                         format = opd->mem_desc.region[id].format;
1850                         mode = fb_format_to_dss_mode(format);
1851                         if (mode < 0) {
1852                                 r = mode;
1853                                 goto err;
1854                         }
1855                         r = dss_mode_to_fb_mode(mode, var);
1856                         if (r < 0)
1857                                 goto err;
1858                 }
1859         }
1860
1861         if (display) {
1862                 u16 w, h;
1863                 int rotation = (var->rotate + ofbi->rotation[0]) % 4;
1864
1865                 display->driver->get_resolution(display, &w, &h);
1866
1867                 if (rotation == FB_ROTATE_CW ||
1868                                 rotation == FB_ROTATE_CCW) {
1869                         var->xres = h;
1870                         var->yres = w;
1871                 } else {
1872                         var->xres = w;
1873                         var->yres = h;
1874                 }
1875
1876                 var->xres_virtual = var->xres;
1877                 var->yres_virtual = var->yres;
1878
1879                 if (!var->bits_per_pixel) {
1880                         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1881                         case 16:
1882                                 var->bits_per_pixel = 16;
1883                                 break;
1884                         case 24:
1885                                 var->bits_per_pixel = 32;
1886                                 break;
1887                         default:
1888                                 dev_err(fbdev->dev, "illegal display "
1889                                                 "bpp\n");
1890                                 return -EINVAL;
1891                         }
1892                 }
1893         } else {
1894                 /* if there's no display, let's just guess some basic values */
1895                 var->xres = 320;
1896                 var->yres = 240;
1897                 var->xres_virtual = var->xres;
1898                 var->yres_virtual = var->yres;
1899                 if (!var->bits_per_pixel)
1900                         var->bits_per_pixel = 16;
1901         }
1902
1903         r = check_fb_var(fbi, var);
1904         if (r)
1905                 goto err;
1906
1907         set_fb_fix(fbi);
1908         r = setup_vrfb_rotation(fbi);
1909         if (r)
1910                 goto err;
1911
1912         r = fb_alloc_cmap(&fbi->cmap, 256, 0);
1913         if (r)
1914                 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1915
1916 err:
1917         return r;
1918 }
1919
1920 static void fbinfo_cleanup(struct omapfb2_device *fbdev, struct fb_info *fbi)
1921 {
1922         fb_dealloc_cmap(&fbi->cmap);
1923 }
1924
1925
1926 static void omapfb_free_resources(struct omapfb2_device *fbdev)
1927 {
1928         int i;
1929
1930         DBG("free_resources\n");
1931
1932         if (fbdev == NULL)
1933                 return;
1934
1935         for (i = 0; i < fbdev->num_fbs; i++)
1936                 unregister_framebuffer(fbdev->fbs[i]);
1937
1938         /* free the reserved fbmem */
1939         omapfb_free_all_fbmem(fbdev);
1940
1941         for (i = 0; i < fbdev->num_fbs; i++) {
1942                 fbinfo_cleanup(fbdev, fbdev->fbs[i]);
1943                 framebuffer_release(fbdev->fbs[i]);
1944         }
1945
1946         for (i = 0; i < fbdev->num_displays; i++) {
1947                 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
1948
1949                 if (fbdev->displays[i].auto_update_work_enabled)
1950                         omapfb_stop_auto_update(fbdev, dssdev);
1951
1952                 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
1953                         dssdev->driver->disable(dssdev);
1954
1955                 omap_dss_put_device(dssdev);
1956         }
1957
1958         if (fbdev->auto_update_wq != NULL) {
1959                 flush_workqueue(fbdev->auto_update_wq);
1960                 destroy_workqueue(fbdev->auto_update_wq);
1961                 fbdev->auto_update_wq = NULL;
1962         }
1963
1964         dev_set_drvdata(fbdev->dev, NULL);
1965         kfree(fbdev);
1966 }
1967
1968 static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
1969 {
1970         int r, i;
1971
1972         fbdev->num_fbs = 0;
1973
1974         DBG("create %d framebuffers\n", CONFIG_FB_OMAP2_NUM_FBS);
1975
1976         /* allocate fb_infos */
1977         for (i = 0; i < CONFIG_FB_OMAP2_NUM_FBS; i++) {
1978                 struct fb_info *fbi;
1979                 struct omapfb_info *ofbi;
1980
1981                 fbi = framebuffer_alloc(sizeof(struct omapfb_info),
1982                                 fbdev->dev);
1983
1984                 if (fbi == NULL) {
1985                         dev_err(fbdev->dev,
1986                                 "unable to allocate memory for plane info\n");
1987                         return -ENOMEM;
1988                 }
1989
1990                 clear_fb_info(fbi);
1991
1992                 fbdev->fbs[i] = fbi;
1993
1994                 ofbi = FB2OFB(fbi);
1995                 ofbi->fbdev = fbdev;
1996                 ofbi->id = i;
1997
1998                 ofbi->region = &fbdev->regions[i];
1999                 ofbi->region->id = i;
2000                 init_rwsem(&ofbi->region->lock);
2001
2002                 /* assign these early, so that fb alloc can use them */
2003                 ofbi->rotation_type = def_vrfb ? OMAP_DSS_ROT_VRFB :
2004                         OMAP_DSS_ROT_DMA;
2005                 ofbi->mirror = def_mirror;
2006
2007                 fbdev->num_fbs++;
2008         }
2009
2010         DBG("fb_infos allocated\n");
2011
2012         /* assign overlays for the fbs */
2013         for (i = 0; i < min(fbdev->num_fbs, fbdev->num_overlays); i++) {
2014                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
2015
2016                 ofbi->overlays[0] = fbdev->overlays[i];
2017                 ofbi->num_overlays = 1;
2018         }
2019
2020         /* allocate fb memories */
2021         r = omapfb_allocate_all_fbs(fbdev);
2022         if (r) {
2023                 dev_err(fbdev->dev, "failed to allocate fbmem\n");
2024                 return r;
2025         }
2026
2027         DBG("fbmems allocated\n");
2028
2029         /* setup fb_infos */
2030         for (i = 0; i < fbdev->num_fbs; i++) {
2031                 struct fb_info *fbi = fbdev->fbs[i];
2032                 struct omapfb_info *ofbi = FB2OFB(fbi);
2033
2034                 omapfb_get_mem_region(ofbi->region);
2035                 r = omapfb_fb_init(fbdev, fbi);
2036                 omapfb_put_mem_region(ofbi->region);
2037
2038                 if (r) {
2039                         dev_err(fbdev->dev, "failed to setup fb_info\n");
2040                         return r;
2041                 }
2042         }
2043
2044         DBG("fb_infos initialized\n");
2045
2046         for (i = 0; i < fbdev->num_fbs; i++) {
2047                 r = register_framebuffer(fbdev->fbs[i]);
2048                 if (r != 0) {
2049                         dev_err(fbdev->dev,
2050                                 "registering framebuffer %d failed\n", i);
2051                         return r;
2052                 }
2053         }
2054
2055         DBG("framebuffers registered\n");
2056
2057         for (i = 0; i < fbdev->num_fbs; i++) {
2058                 struct fb_info *fbi = fbdev->fbs[i];
2059                 struct omapfb_info *ofbi = FB2OFB(fbi);
2060
2061                 omapfb_get_mem_region(ofbi->region);
2062                 r = omapfb_apply_changes(fbi, 1);
2063                 omapfb_put_mem_region(ofbi->region);
2064
2065                 if (r) {
2066                         dev_err(fbdev->dev, "failed to change mode\n");
2067                         return r;
2068                 }
2069         }
2070
2071         /* Enable fb0 */
2072         if (fbdev->num_fbs > 0) {
2073                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);
2074
2075                 if (ofbi->num_overlays > 0) {
2076                         struct omap_overlay *ovl = ofbi->overlays[0];
2077
2078                         r = omapfb_overlay_enable(ovl, 1);
2079
2080                         if (r) {
2081                                 dev_err(fbdev->dev,
2082                                                 "failed to enable overlay\n");
2083                                 return r;
2084                         }
2085                 }
2086         }
2087
2088         DBG("create_framebuffers done\n");
2089
2090         return 0;
2091 }
2092
2093 static int omapfb_mode_to_timings(const char *mode_str,
2094                 struct omap_video_timings *timings, u8 *bpp)
2095 {
2096         struct fb_info *fbi;
2097         struct fb_var_screeninfo *var;
2098         struct fb_ops *fbops;
2099         int r;
2100
2101 #ifdef CONFIG_OMAP2_DSS_VENC
2102         if (strcmp(mode_str, "pal") == 0) {
2103                 *timings = omap_dss_pal_timings;
2104                 *bpp = 24;
2105                 return 0;
2106         } else if (strcmp(mode_str, "ntsc") == 0) {
2107                 *timings = omap_dss_ntsc_timings;
2108                 *bpp = 24;
2109                 return 0;
2110         }
2111 #endif
2112
2113         /* this is quite a hack, but I wanted to use the modedb and for
2114          * that we need fb_info and var, so we create dummy ones */
2115
2116         *bpp = 0;
2117         fbi = NULL;
2118         var = NULL;
2119         fbops = NULL;
2120
2121         fbi = kzalloc(sizeof(*fbi), GFP_KERNEL);
2122         if (fbi == NULL) {
2123                 r = -ENOMEM;
2124                 goto err;
2125         }
2126
2127         var = kzalloc(sizeof(*var), GFP_KERNEL);
2128         if (var == NULL) {
2129                 r = -ENOMEM;
2130                 goto err;
2131         }
2132
2133         fbops = kzalloc(sizeof(*fbops), GFP_KERNEL);
2134         if (fbops == NULL) {
2135                 r = -ENOMEM;
2136                 goto err;
2137         }
2138
2139         fbi->fbops = fbops;
2140
2141         r = fb_find_mode(var, fbi, mode_str, NULL, 0, NULL, 24);
2142         if (r == 0) {
2143                 r = -EINVAL;
2144                 goto err;
2145         }
2146
2147         timings->pixel_clock = PICOS2KHZ(var->pixclock);
2148         timings->hbp = var->left_margin;
2149         timings->hfp = var->right_margin;
2150         timings->vbp = var->upper_margin;
2151         timings->vfp = var->lower_margin;
2152         timings->hsw = var->hsync_len;
2153         timings->vsw = var->vsync_len;
2154         timings->x_res = var->xres;
2155         timings->y_res = var->yres;
2156
2157         switch (var->bits_per_pixel) {
2158         case 16:
2159                 *bpp = 16;
2160                 break;
2161         case 24:
2162         case 32:
2163         default:
2164                 *bpp = 24;
2165                 break;
2166         }
2167
2168         r = 0;
2169
2170 err:
2171         kfree(fbi);
2172         kfree(var);
2173         kfree(fbops);
2174
2175         return r;
2176 }
2177
2178 static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
2179                 struct omap_dss_device *display, char *mode_str)
2180 {
2181         int r;
2182         u8 bpp;
2183         struct omap_video_timings timings, temp_timings;
2184         struct omapfb_display_data *d;
2185
2186         r = omapfb_mode_to_timings(mode_str, &timings, &bpp);
2187         if (r)
2188                 return r;
2189
2190         d = get_display_data(fbdev, display);
2191         d->bpp_override = bpp;
2192
2193         if (display->driver->check_timings) {
2194                 r = display->driver->check_timings(display, &timings);
2195                 if (r)
2196                         return r;
2197         } else {
2198                 /* If check_timings is not present compare xres and yres */
2199                 if (display->driver->get_timings) {
2200                         display->driver->get_timings(display, &temp_timings);
2201
2202                         if (temp_timings.x_res != timings.x_res ||
2203                                 temp_timings.y_res != timings.y_res)
2204                                 return -EINVAL;
2205                 }
2206         }
2207
2208         if (display->driver->set_timings)
2209                         display->driver->set_timings(display, &timings);
2210
2211         return 0;
2212 }
2213
2214 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
2215                 struct omap_dss_device *dssdev)
2216 {
2217         struct omapfb_display_data *d;
2218
2219         BUG_ON(dssdev->driver->get_recommended_bpp == NULL);
2220
2221         d = get_display_data(fbdev, dssdev);
2222
2223         if (d->bpp_override != 0)
2224                 return d->bpp_override;
2225
2226         return dssdev->driver->get_recommended_bpp(dssdev);
2227 }
2228
2229 static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
2230 {
2231         char *str, *options, *this_opt;
2232         int r = 0;
2233
2234         str = kstrdup(def_mode, GFP_KERNEL);
2235         if (!str)
2236                 return -ENOMEM;
2237         options = str;
2238
2239         while (!r && (this_opt = strsep(&options, ",")) != NULL) {
2240                 char *p, *display_str, *mode_str;
2241                 struct omap_dss_device *display;
2242                 int i;
2243
2244                 p = strchr(this_opt, ':');
2245                 if (!p) {
2246                         r = -EINVAL;
2247                         break;
2248                 }
2249
2250                 *p = 0;
2251                 display_str = this_opt;
2252                 mode_str = p + 1;
2253
2254                 display = NULL;
2255                 for (i = 0; i < fbdev->num_displays; ++i) {
2256                         if (strcmp(fbdev->displays[i].dssdev->name,
2257                                                 display_str) == 0) {
2258                                 display = fbdev->displays[i].dssdev;
2259                                 break;
2260                         }
2261                 }
2262
2263                 if (!display) {
2264                         r = -EINVAL;
2265                         break;
2266                 }
2267
2268                 r = omapfb_set_def_mode(fbdev, display, mode_str);
2269                 if (r)
2270                         break;
2271         }
2272
2273         kfree(str);
2274
2275         return r;
2276 }
2277
2278 static void fb_videomode_to_omap_timings(struct fb_videomode *m,
2279                 struct omap_video_timings *t)
2280 {
2281         t->x_res = m->xres;
2282         t->y_res = m->yres;
2283         t->pixel_clock = PICOS2KHZ(m->pixclock);
2284         t->hsw = m->hsync_len;
2285         t->hfp = m->right_margin;
2286         t->hbp = m->left_margin;
2287         t->vsw = m->vsync_len;
2288         t->vfp = m->lower_margin;
2289         t->vbp = m->upper_margin;
2290 }
2291
2292 static int omapfb_find_best_mode(struct omap_dss_device *display,
2293                 struct omap_video_timings *timings)
2294 {
2295         struct fb_monspecs *specs;
2296         u8 *edid;
2297         int r, i, best_xres, best_idx, len;
2298
2299         if (!display->driver->read_edid)
2300                 return -ENODEV;
2301
2302         len = 0x80 * 2;
2303         edid = kmalloc(len, GFP_KERNEL);
2304
2305         r = display->driver->read_edid(display, edid, len);
2306         if (r < 0)
2307                 goto err1;
2308
2309         specs = kzalloc(sizeof(*specs), GFP_KERNEL);
2310
2311         fb_edid_to_monspecs(edid, specs);
2312
2313         if (edid[126] > 0)
2314                 fb_edid_add_monspecs(edid + 0x80, specs);
2315
2316         best_xres = 0;
2317         best_idx = -1;
2318
2319         for (i = 0; i < specs->modedb_len; ++i) {
2320                 struct fb_videomode *m;
2321                 struct omap_video_timings t;
2322
2323                 m = &specs->modedb[i];
2324
2325                 if (m->pixclock == 0)
2326                         continue;
2327
2328                 /* skip repeated pixel modes */
2329                 if (m->xres == 2880 || m->xres == 1440)
2330                         continue;
2331
2332                 fb_videomode_to_omap_timings(m, &t);
2333
2334                 r = display->driver->check_timings(display, &t);
2335                 if (r == 0 && best_xres < m->xres) {
2336                         best_xres = m->xres;
2337                         best_idx = i;
2338                 }
2339         }
2340
2341         if (best_xres == 0) {
2342                 r = -ENOENT;
2343                 goto err2;
2344         }
2345
2346         fb_videomode_to_omap_timings(&specs->modedb[best_idx], timings);
2347
2348         r = 0;
2349
2350 err2:
2351         fb_destroy_modedb(specs->modedb);
2352         kfree(specs);
2353 err1:
2354         kfree(edid);
2355
2356         return r;
2357 }
2358
2359 static int omapfb_init_display(struct omapfb2_device *fbdev,
2360                 struct omap_dss_device *dssdev)
2361 {
2362         struct omap_dss_driver *dssdrv = dssdev->driver;
2363         struct omapfb_display_data *d;
2364         int r;
2365
2366         r = dssdrv->enable(dssdev);
2367         if (r) {
2368                 dev_warn(fbdev->dev, "Failed to enable display '%s'\n",
2369                                 dssdev->name);
2370                 return r;
2371         }
2372
2373         d = get_display_data(fbdev, dssdev);
2374
2375         d->fbdev = fbdev;
2376
2377         if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
2378                 u16 w, h;
2379
2380                 if (auto_update) {
2381                         omapfb_start_auto_update(fbdev, dssdev);
2382                         d->update_mode = OMAPFB_AUTO_UPDATE;
2383                 } else {
2384                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2385                 }
2386
2387                 if (dssdrv->enable_te) {
2388                         r = dssdrv->enable_te(dssdev, 1);
2389                         if (r) {
2390                                 dev_err(fbdev->dev, "Failed to set TE\n");
2391                                 return r;
2392                         }
2393                 }
2394
2395                 dssdrv->get_resolution(dssdev, &w, &h);
2396                 r = dssdrv->update(dssdev, 0, 0, w, h);
2397                 if (r) {
2398                         dev_err(fbdev->dev,
2399                                         "Failed to update display\n");
2400                         return r;
2401                 }
2402         } else {
2403                 d->update_mode = OMAPFB_AUTO_UPDATE;
2404         }
2405
2406         return 0;
2407 }
2408
2409 static int omapfb_probe(struct platform_device *pdev)
2410 {
2411         struct omapfb2_device *fbdev = NULL;
2412         int r = 0;
2413         int i;
2414         struct omap_overlay *ovl;
2415         struct omap_dss_device *def_display;
2416         struct omap_dss_device *dssdev;
2417
2418         DBG("omapfb_probe\n");
2419
2420         if (pdev->num_resources != 0) {
2421                 dev_err(&pdev->dev, "probed for an unknown device\n");
2422                 r = -ENODEV;
2423                 goto err0;
2424         }
2425
2426         fbdev = kzalloc(sizeof(struct omapfb2_device), GFP_KERNEL);
2427         if (fbdev == NULL) {
2428                 r = -ENOMEM;
2429                 goto err0;
2430         }
2431
2432         /* TODO : Replace cpu check with omap_has_vrfb once HAS_FEATURE
2433         *        available for OMAP2 and OMAP3
2434         */
2435         if (def_vrfb && !cpu_is_omap24xx() && !cpu_is_omap34xx()) {
2436                 def_vrfb = 0;
2437                 dev_warn(&pdev->dev, "VRFB is not supported on this hardware, "
2438                                 "ignoring the module parameter vrfb=y\n");
2439         }
2440
2441
2442         mutex_init(&fbdev->mtx);
2443
2444         fbdev->dev = &pdev->dev;
2445         platform_set_drvdata(pdev, fbdev);
2446
2447         r = 0;
2448         fbdev->num_displays = 0;
2449         dssdev = NULL;
2450         for_each_dss_dev(dssdev) {
2451                 struct omapfb_display_data *d;
2452
2453                 omap_dss_get_device(dssdev);
2454
2455                 if (!dssdev->driver) {
2456                         dev_warn(&pdev->dev, "no driver for display: %s\n",
2457                                 dssdev->name);
2458                         omap_dss_put_device(dssdev);
2459                         continue;
2460                 }
2461
2462                 d = &fbdev->displays[fbdev->num_displays++];
2463                 d->dssdev = dssdev;
2464                 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
2465                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2466                 else
2467                         d->update_mode = OMAPFB_AUTO_UPDATE;
2468         }
2469
2470         if (r)
2471                 goto cleanup;
2472
2473         if (fbdev->num_displays == 0) {
2474                 dev_err(&pdev->dev, "no displays\n");
2475                 r = -EINVAL;
2476                 goto cleanup;
2477         }
2478
2479         fbdev->num_overlays = omap_dss_get_num_overlays();
2480         for (i = 0; i < fbdev->num_overlays; i++)
2481                 fbdev->overlays[i] = omap_dss_get_overlay(i);
2482
2483         fbdev->num_managers = omap_dss_get_num_overlay_managers();
2484         for (i = 0; i < fbdev->num_managers; i++)
2485                 fbdev->managers[i] = omap_dss_get_overlay_manager(i);
2486
2487         /* gfx overlay should be the default one. find a display
2488          * connected to that, and use it as default display */
2489         ovl = omap_dss_get_overlay(0);
2490         if (ovl->manager && ovl->manager->device) {
2491                 def_display = ovl->manager->device;
2492         } else {
2493                 dev_warn(&pdev->dev, "cannot find default display\n");
2494                 def_display = NULL;
2495         }
2496
2497         if (def_mode && strlen(def_mode) > 0) {
2498                 if (omapfb_parse_def_modes(fbdev))
2499                         dev_warn(&pdev->dev, "cannot parse default modes\n");
2500         } else if (def_display && def_display->driver->set_timings &&
2501                         def_display->driver->check_timings) {
2502                 struct omap_video_timings t;
2503
2504                 r = omapfb_find_best_mode(def_display, &t);
2505
2506                 if (r == 0)
2507                         def_display->driver->set_timings(def_display, &t);
2508         }
2509
2510         r = omapfb_create_framebuffers(fbdev);
2511         if (r)
2512                 goto cleanup;
2513
2514         for (i = 0; i < fbdev->num_managers; i++) {
2515                 struct omap_overlay_manager *mgr;
2516                 mgr = fbdev->managers[i];
2517                 r = mgr->apply(mgr);
2518                 if (r)
2519                         dev_warn(fbdev->dev, "failed to apply dispc config\n");
2520         }
2521
2522         DBG("mgr->apply'ed\n");
2523
2524         if (def_display) {
2525                 r = omapfb_init_display(fbdev, def_display);
2526                 if (r) {
2527                         dev_err(fbdev->dev,
2528                                         "failed to initialize default "
2529                                         "display\n");
2530                         goto cleanup;
2531                 }
2532         }
2533
2534         DBG("create sysfs for fbs\n");
2535         r = omapfb_create_sysfs(fbdev);
2536         if (r) {
2537                 dev_err(fbdev->dev, "failed to create sysfs entries\n");
2538                 goto cleanup;
2539         }
2540
2541         return 0;
2542
2543 cleanup:
2544         omapfb_free_resources(fbdev);
2545 err0:
2546         dev_err(&pdev->dev, "failed to setup omapfb\n");
2547         return r;
2548 }
2549
2550 static int omapfb_remove(struct platform_device *pdev)
2551 {
2552         struct omapfb2_device *fbdev = platform_get_drvdata(pdev);
2553
2554         /* FIXME: wait till completion of pending events */
2555
2556         omapfb_remove_sysfs(fbdev);
2557
2558         omapfb_free_resources(fbdev);
2559
2560         return 0;
2561 }
2562
2563 static struct platform_driver omapfb_driver = {
2564         .probe          = omapfb_probe,
2565         .remove         = omapfb_remove,
2566         .driver         = {
2567                 .name   = "omapfb",
2568                 .owner  = THIS_MODULE,
2569         },
2570 };
2571
2572 static int __init omapfb_init(void)
2573 {
2574         DBG("omapfb_init\n");
2575
2576         if (platform_driver_register(&omapfb_driver)) {
2577                 printk(KERN_ERR "failed to register omapfb driver\n");
2578                 return -ENODEV;
2579         }
2580
2581         return 0;
2582 }
2583
2584 static void __exit omapfb_exit(void)
2585 {
2586         DBG("omapfb_exit\n");
2587         platform_driver_unregister(&omapfb_driver);
2588 }
2589
2590 module_param_named(mode, def_mode, charp, 0);
2591 module_param_named(vram, def_vram, charp, 0);
2592 module_param_named(rotate, def_rotate, int, 0);
2593 module_param_named(vrfb, def_vrfb, bool, 0);
2594 module_param_named(mirror, def_mirror, bool, 0);
2595 module_param_named(vram_cache, def_vram_cache, bool, 0644);
2596
2597 /* late_initcall to let panel/ctrl drivers loaded first.
2598  * I guess better option would be a more dynamic approach,
2599  * so that omapfb reacts to new panels when they are loaded */
2600 late_initcall(omapfb_init);
2601 /*module_init(omapfb_init);*/
2602 module_exit(omapfb_exit);
2603
2604 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
2605 MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
2606 MODULE_LICENSE("GPL v2");