drivers/video/mxc_ipuv3_fb.c

   1 /*
   2  * Porting to u-boot:
   3  *
   4  * (C) Copyright 2010
   5  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   6  *
   7  * MX51 Linux framebuffer:
   8  *
   9  * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 #include <common.h>
  31 #include <asm/errno.h>
  32 #include <linux/string.h>
  33 #include <linux/list.h>
  34 #include <linux/fb.h>
  35 #include <asm/io.h>
  36 #include <malloc.h>
  37 #include <video_fb.h>
  38 #include "videomodes.h"
  39 #include "ipu.h"
  40 #include "mxcfb.h"
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 static int mxcfb_map_video_memory(struct fb_info *fbi);
  45 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  46
  47 /* graphics setup */
  48 static GraphicDevice panel;
  49 static struct fb_videomode *gmode;
  50 static uint8_t gdisp;
  51 static uint32_t gpixfmt;
  52
  53 void fb_videomode_to_var(struct fb_var_screeninfo *var,
  54                          const struct fb_videomode *mode)
  55 {
  56         var->xres = mode->xres;
  57         var->yres = mode->yres;
  58         var->xres_virtual = mode->xres;
  59         var->yres_virtual = mode->yres;
  60         var->xoffset = 0;
  61         var->yoffset = 0;
  62         var->pixclock = mode->pixclock;
  63         var->left_margin = mode->left_margin;
  64         var->right_margin = mode->right_margin;
  65         var->upper_margin = mode->upper_margin;
  66         var->lower_margin = mode->lower_margin;
  67         var->hsync_len = mode->hsync_len;
  68         var->vsync_len = mode->vsync_len;
  69         var->sync = mode->sync;
  70         var->vmode = mode->vmode & FB_VMODE_MASK;
  71 }
  72
  73 /*
  74  * Structure containing the MXC specific framebuffer information.
  75  */
  76 struct mxcfb_info {
  77         int blank;
  78         ipu_channel_t ipu_ch;
  79         int ipu_di;
  80         u32 ipu_di_pix_fmt;
  81         unsigned char overlay;
  82         unsigned char alpha_chan_en;
  83         dma_addr_t alpha_phy_addr0;
  84         dma_addr_t alpha_phy_addr1;
  85         void *alpha_virt_addr0;
  86         void *alpha_virt_addr1;
  87         uint32_t alpha_mem_len;
  88         uint32_t cur_ipu_buf;
  89         uint32_t cur_ipu_alpha_buf;
  90
  91         u32 pseudo_palette[16];
  92 };
  93
  94 enum {
  95         BOTH_ON,
  96         SRC_ON,
  97         TGT_ON,
  98         BOTH_OFF
  99 };
 100
 101 static unsigned long default_bpp = 16;
 102 static unsigned char g_dp_in_use;
 103 static struct fb_info *mxcfb_info[3];
 104 static int ext_clk_used;
 105
 106 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 107 {
 108         uint32_t pixfmt = 0;
 109
 110         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 111
 112         if (fbi->var.nonstd)
 113                 return fbi->var.nonstd;
 114
 115         switch (fbi->var.bits_per_pixel) {
 116         case 32:
 117                 pixfmt = IPU_PIX_FMT_BGR32;
 118                 break;
 119         case 16:
 120                 pixfmt = IPU_PIX_FMT_RGB565;
 121                 break;
 122         }
 123         return pixfmt;
 124 }
 125
 126 /*
 127  * Set fixed framebuffer parameters based on variable settings.
 128  *
 129  * @param       info     framebuffer information pointer
 130  */
 131 static int mxcfb_set_fix(struct fb_info *info)
 132 {
 133         struct fb_fix_screeninfo *fix = &info->fix;
 134         struct fb_var_screeninfo *var = &info->var;
 135
 136         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 137
 138         fix->type = FB_TYPE_PACKED_PIXELS;
 139         fix->accel = FB_ACCEL_NONE;
 140         fix->visual = FB_VISUAL_TRUECOLOR;
 141         fix->xpanstep = 1;
 142         fix->ypanstep = 1;
 143
 144         return 0;
 145 }
 146
 147 static int setup_disp_channel1(struct fb_info *fbi)
 148 {
 149         ipu_channel_params_t params;
 150         struct mxcfb_info *mxc_fbi = fbi->par;
 151
 152         memset(&params, 0, sizeof(params));
 153         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 154
 155         debug("%s called\n", __func__);
 156         /*
 157          * Assuming interlaced means yuv output, below setting also
 158          * valid for mem_dc_sync. FG should have the same vmode as BG.
 159          */
 160         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 161                 params.mem_dp_bg_sync.interlaced = 1;
 162                 params.mem_dp_bg_sync.out_pixel_fmt =
 163                         IPU_PIX_FMT_YUV444;
 164         } else {
 165                 if (mxc_fbi->ipu_di_pix_fmt) {
 166                         params.mem_dp_bg_sync.out_pixel_fmt =
 167                                 mxc_fbi->ipu_di_pix_fmt;
 168                 } else {
 169                         params.mem_dp_bg_sync.out_pixel_fmt =
 170                                 IPU_PIX_FMT_RGB666;
 171                 }
 172         }
 173         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 174         if (mxc_fbi->alpha_chan_en)
 175                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 176
 177         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 178
 179         return 0;
 180 }
 181
 182 static int setup_disp_channel2(struct fb_info *fbi)
 183 {
 184         int retval = 0;
 185         struct mxcfb_info *mxc_fbi = fbi->par;
 186
 187         mxc_fbi->cur_ipu_buf = 1;
 188         if (mxc_fbi->alpha_chan_en)
 189                 mxc_fbi->cur_ipu_alpha_buf = 1;
 190
 191         fbi->var.xoffset = fbi->var.yoffset = 0;
 192
 193         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 194                 __func__,
 195                 mxc_fbi->ipu_ch,
 196                 fbi->var.xres,
 197                 fbi->var.yres,
 198                 fbi->fix.line_length,
 199                 fbi->fix.smem_start,
 200                 fbi->fix.smem_start +
 201                 (fbi->fix.line_length * fbi->var.yres) - 1);
 202
 203         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 204                                          bpp_to_pixfmt(fbi),
 205                                          fbi->var.xres, fbi->var.yres,
 206                                          fbi->fix.line_length,
 207                                          fbi->fix.smem_start +
 208                                          (fbi->fix.line_length * fbi->var.yres),
 209                                          fbi->fix.smem_start,
 210                                          0, 0);
 211         if (retval)
 212                 printf("ipu_init_channel_buffer error %d\n", retval);
 213
 214         return retval;
 215 }
 216
 217 /*
 218  * Set framebuffer parameters and change the operating mode.
 219  *
 220  * @param       info     framebuffer information pointer
 221  */
 222 static int mxcfb_set_par(struct fb_info *fbi)
 223 {
 224         int retval = 0;
 225         u32 mem_len;
 226         ipu_di_signal_cfg_t sig_cfg;
 227         struct mxcfb_info *mxc_fbi = fbi->par;
 228         uint32_t out_pixel_fmt;
 229
 230         ipu_disable_channel(mxc_fbi->ipu_ch);
 231         ipu_uninit_channel(mxc_fbi->ipu_ch);
 232         mxcfb_set_fix(fbi);
 233
 234         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 235         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 236                 if (fbi->fix.smem_start)
 237                         mxcfb_unmap_video_memory(fbi);
 238
 239                 if (mxcfb_map_video_memory(fbi) < 0)
 240                         return -ENOMEM;
 241         }
 242
 243         setup_disp_channel1(fbi);
 244
 245         memset(&sig_cfg, 0, sizeof(sig_cfg));
 246         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 247                 sig_cfg.interlaced = 1;
 248                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 249         } else {
 250                 if (mxc_fbi->ipu_di_pix_fmt)
 251                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 252                 else
 253                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 254         }
 255         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 256                 sig_cfg.odd_field_first = 1;
 257         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 258                 sig_cfg.ext_clk = 1;
 259         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 260                 sig_cfg.Hsync_pol = 1;
 261         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 262                 sig_cfg.Vsync_pol = 1;
 263         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 264                 sig_cfg.clk_pol = 1;
 265         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 266                 sig_cfg.data_pol = 1;
 267         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 268                 sig_cfg.enable_pol = 1;
 269         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 270                 sig_cfg.clkidle_en = 1;
 271
 272         debug("pixclock = %lu.%03lu MHz\n",
 273                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 274                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 275
 276         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 277                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 278                                 fbi->var.xres, fbi->var.yres,
 279                                 out_pixel_fmt,
 280                                 fbi->var.left_margin,
 281                                 fbi->var.hsync_len,
 282                                 fbi->var.right_margin,
 283                                 fbi->var.upper_margin,
 284                                 fbi->var.vsync_len,
 285                                 fbi->var.lower_margin,
 286                                 0, sig_cfg);
 287         if (retval != 0) {
 288                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 289                 return retval;
 290         }
 291
 292         retval = setup_disp_channel2(fbi);
 293         if (retval)
 294                 return retval;
 295
 296         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 297                 ipu_enable_channel(mxc_fbi->ipu_ch);
 298
 299         return retval;
 300 }
 301
 302 /*
 303  * Check framebuffer variable parameters and adjust to valid values.
 304  *
 305  * @param       var      framebuffer variable parameters
 306  *
 307  * @param       info     framebuffer information pointer
 308  */
 309 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 310 {
 311         u32 vtotal;
 312         u32 htotal;
 313
 314         if (var->xres_virtual < var->xres)
 315                 var->xres_virtual = var->xres;
 316         if (var->yres_virtual < var->yres)
 317                 var->yres_virtual = var->yres;
 318
 319         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 16) &&
 320                 (var->bits_per_pixel != 8))
 321                 var->bits_per_pixel = default_bpp;
 322
 323         switch (var->bits_per_pixel) {
 324         case 8:
 325                 var->red.length = 3;
 326                 var->red.offset = 5;
 327                 var->red.msb_right = 0;
 328
 329                 var->green.length = 3;
 330                 var->green.offset = 2;
 331                 var->green.msb_right = 0;
 332
 333                 var->blue.length = 2;
 334                 var->blue.offset = 0;
 335                 var->blue.msb_right = 0;
 336
 337                 var->transp.length = 0;
 338                 var->transp.offset = 0;
 339                 var->transp.msb_right = 0;
 340                 break;
 341         case 16:
 342                 var->red.length = 5;
 343                 var->red.offset = 11;
 344                 var->red.msb_right = 0;
 345
 346                 var->green.length = 6;
 347                 var->green.offset = 5;
 348                 var->green.msb_right = 0;
 349
 350                 var->blue.length = 5;
 351                 var->blue.offset = 0;
 352                 var->blue.msb_right = 0;
 353
 354                 var->transp.length = 0;
 355                 var->transp.offset = 0;
 356                 var->transp.msb_right = 0;
 357                 break;
 358
 359         case 32:
 360                 var->red.length = 8;
 361                 var->red.offset = 16;
 362                 var->red.msb_right = 0;
 363
 364                 var->green.length = 8;
 365                 var->green.offset = 8;
 366                 var->green.msb_right = 0;
 367
 368                 var->blue.length = 8;
 369                 var->blue.offset = 0;
 370                 var->blue.msb_right = 0;
 371
 372                 var->transp.length = 8;
 373                 var->transp.offset = 24;
 374                 var->transp.msb_right = 0;
 375                 break;
 376         }
 377
 378         if (var->pixclock < 1000) {
 379                 htotal = var->xres + var->right_margin + var->hsync_len +
 380                     var->left_margin;
 381                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 382                     var->upper_margin;
 383                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 384                 var->pixclock = KHZ2PICOS(var->pixclock);
 385                 printf("pixclock set for 60Hz refresh = %u ps\n",
 386                         var->pixclock);
 387         }
 388
 389         var->height = -1;
 390         var->width = -1;
 391         var->grayscale = 0;
 392
 393         return 0;
 394 }
 395
 396 static int mxcfb_map_video_memory(struct fb_info *fbi)
 397 {
 398         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 399                 fbi->fix.smem_len = fbi->var.yres_virtual *
 400                                     fbi->fix.line_length;
 401         }
 402         if (gd->fb_base)
 403                 fbi->screen_base = (void *)gd->fb_base;
 404         else
 405                 fbi->screen_base = malloc(fbi->fix.smem_len);
 406         if (fbi->screen_base == 0) {
 407                 puts("Unable to allocate framebuffer memory\n");
 408                 fbi->fix.smem_len = 0;
 409                 return -EBUSY;
 410         }
 411         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 412
 413         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 414                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 415
 416         fbi->screen_size = fbi->fix.smem_len;
 417
 418         /* Clear the screen */
 419         memset(fbi->screen_base, 0, fbi->fix.smem_len);
 420
 421         return 0;
 422 }
 423
 424 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 425 {
 426         fbi->screen_base = 0;
 427         fbi->fix.smem_start = 0;
 428         fbi->fix.smem_len = 0;
 429         return 0;
 430 }
 431
 432 /*
 433  * Initializes the framebuffer information pointer. After allocating
 434  * sufficient memory for the framebuffer structure, the fields are
 435  * filled with custom information passed in from the configurable
 436  * structures.  This includes information such as bits per pixel,
 437  * color maps, screen width/height and RGBA offsets.
 438  *
 439  * @return      Framebuffer structure initialized with our information
 440  */
 441 static struct fb_info *mxcfb_init_fbinfo(void)
 442 {
 443         struct fb_info *fbi;
 444         struct mxcfb_info *mxcfbi;
 445         void *p;
 446         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 447                 sizeof(struct fb_info);
 448
 449         debug("%s: %d %d %d\n",
 450                 __func__,
 451                 size,
 452                 sizeof(struct mxcfb_info),
 453                 sizeof(struct fb_info));
 454         /*
 455          * Allocate sufficient memory for the fb structure
 456          */
 457
 458         p = malloc(size);
 459         if (!p)
 460                 return NULL;
 461
 462         memset(p, 0, size);
 463
 464         fbi = p;
 465         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 466
 467         mxcfbi = (struct mxcfb_info *)fbi->par;
 468         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 469                 fbi, mxcfbi);
 470
 471         fbi->var.activate = FB_ACTIVATE_NOW;
 472
 473         fbi->flags = FBINFO_FLAG_DEFAULT;
 474         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 475
 476         return fbi;
 477 }
 478
 479 /*
 480  * Probe routine for the framebuffer driver. It is called during the
 481  * driver binding process.      The following functions are performed in
 482  * this routine: Framebuffer initialization, Memory allocation and
 483  * mapping, Framebuffer registration, IPU initialization.
 484  *
 485  * @return      Appropriate error code to the kernel common code
 486  */
 487 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 488                         struct fb_videomode *mode)
 489 {
 490         struct fb_info *fbi;
 491         struct mxcfb_info *mxcfbi;
 492         int ret = 0;
 493
 494         /*
 495          * Initialize FB structures
 496          */
 497         fbi = mxcfb_init_fbinfo();
 498         if (!fbi) {
 499                 ret = -ENOMEM;
 500                 goto err0;
 501         }
 502         mxcfbi = (struct mxcfb_info *)fbi->par;
 503
 504         if (!g_dp_in_use) {
 505                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 506                 mxcfbi->blank = FB_BLANK_UNBLANK;
 507         } else {
 508                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 509                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 510         }
 511
 512         mxcfbi->ipu_di = disp;
 513
 514         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 515         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 516         strcpy(fbi->fix.id, "DISP3 BG");
 517
 518         g_dp_in_use = 1;
 519
 520         mxcfb_info[mxcfbi->ipu_di] = fbi;
 521
 522         /* Need dummy values until real panel is configured */
 523
 524         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 525         fb_videomode_to_var(&fbi->var, mode);
 526         fbi->var.bits_per_pixel = default_bpp;
 527         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 528         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 529
 530         mxcfb_check_var(&fbi->var, fbi);
 531
 532         /* Default Y virtual size is 2x panel size */
 533         fbi->var.yres_virtual = fbi->var.yres * 2;
 534
 535         mxcfb_set_fix(fbi);
 536
 537         /* alocate fb first */
 538         if (mxcfb_map_video_memory(fbi) < 0)
 539                 return -ENOMEM;
 540
 541         mxcfb_set_par(fbi);
 542
 543         panel.winSizeX = mode->xres;
 544         panel.winSizeY = mode->yres;
 545         panel.plnSizeX = mode->xres;
 546         panel.plnSizeY = mode->yres;
 547
 548         panel.frameAdrs = (u32)fbi->screen_base;
 549         panel.memSize = fbi->screen_size;
 550
 551         switch (fbi->var.bits_per_pixel) {
 552         case 8:
 553                 panel.gdfBytesPP = 1;
 554                 panel.gdfIndex = GDF__8BIT_INDEX;
 555                 break;
 556
 557         case 16:
 558                 panel.gdfBytesPP = 2;
 559                 panel.gdfIndex = GDF_16BIT_565RGB;
 560                 break;
 561
 562         case 32:
 563                 panel.gdfBytesPP = 4;
 564                 panel.gdfIndex = GDF_32BIT_X888RGB;
 565                 break;
 566
 567         default:
 568                 hang();
 569         }
 570
 571         ipu_dump_registers();
 572
 573         return 0;
 574
 575 err0:
 576         return ret;
 577 }
 578
 579 void *video_hw_init(void)
 580 {
 581         int ret;
 582
 583         ret = ipu_probe();
 584         if (ret)
 585                 puts("Error initializing IPU\n");
 586
 587         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 588         debug("Framebuffer at 0x%08x\n", panel.frameAdrs);
 589
 590         return &panel;
 591 }
 592
 593 void video_set_lut(unsigned int index, /* color number */
 594                         unsigned char r,    /* red */
 595                         unsigned char g,    /* green */
 596                         unsigned char b     /* blue */
 597                         )
 598 {
 599         return;
 600 }
 601
 602 int mx5_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt, int bpp)
 603 {
 604         gmode = mode;
 605         gdisp = disp;
 606         gpixfmt = pixfmt;
 607         default_bpp = bpp;
 608
 609         return 0;
 610 }