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 static 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
 120         case 16:
 121                 pixfmt = IPU_PIX_FMT_RGB565;
 122                 break;
 123
 124         case 8:
 125                 pixfmt = IPU_PIX_FMT_GENERIC;
 126         }
 127         return pixfmt;
 128 }
 129
 130 /*
 131  * Set fixed framebuffer parameters based on variable settings.
 132  *
 133  * @param       info     framebuffer information pointer
 134  */
 135 static int mxcfb_set_fix(struct fb_info *info)
 136 {
 137         struct fb_fix_screeninfo *fix = &info->fix;
 138         struct fb_var_screeninfo *var = &info->var;
 139
 140         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 141
 142         fix->type = FB_TYPE_PACKED_PIXELS;
 143         fix->accel = FB_ACCEL_NONE;
 144         fix->visual = FB_VISUAL_TRUECOLOR;
 145         fix->xpanstep = 1;
 146         fix->ypanstep = 1;
 147
 148         return 0;
 149 }
 150
 151 static int setup_disp_channel1(struct fb_info *fbi)
 152 {
 153         ipu_channel_params_t params;
 154         struct mxcfb_info *mxc_fbi = fbi->par;
 155
 156         memset(&params, 0, sizeof(params));
 157         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 158
 159         debug("%s called\n", __func__);
 160         /*
 161          * Assuming interlaced means yuv output, below setting also
 162          * valid for mem_dc_sync. FG should have the same vmode as BG.
 163          */
 164         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 165                 params.mem_dp_bg_sync.interlaced = 1;
 166                 params.mem_dp_bg_sync.out_pixel_fmt =
 167                         IPU_PIX_FMT_YUV444;
 168         } else {
 169                 if (mxc_fbi->ipu_di_pix_fmt) {
 170                         params.mem_dp_bg_sync.out_pixel_fmt =
 171                                 mxc_fbi->ipu_di_pix_fmt;
 172                 } else {
 173                         params.mem_dp_bg_sync.out_pixel_fmt =
 174                                 IPU_PIX_FMT_RGB666;
 175                 }
 176         }
 177         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 178         if (mxc_fbi->alpha_chan_en)
 179                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 180
 181         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 182
 183         return 0;
 184 }
 185
 186 static int setup_disp_channel2(struct fb_info *fbi)
 187 {
 188         int retval = 0;
 189         struct mxcfb_info *mxc_fbi = fbi->par;
 190
 191         mxc_fbi->cur_ipu_buf = 1;
 192         if (mxc_fbi->alpha_chan_en)
 193                 mxc_fbi->cur_ipu_alpha_buf = 1;
 194
 195         fbi->var.xoffset = fbi->var.yoffset = 0;
 196
 197         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 198                 __func__,
 199                 mxc_fbi->ipu_ch,
 200                 fbi->var.xres,
 201                 fbi->var.yres,
 202                 fbi->fix.line_length,
 203                 fbi->fix.smem_start,
 204                 fbi->fix.smem_start +
 205                 (fbi->fix.line_length * fbi->var.yres) - 1);
 206
 207         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 208                                          bpp_to_pixfmt(fbi),
 209                                          fbi->var.xres, fbi->var.yres,
 210                                          fbi->fix.line_length,
 211                                          fbi->fix.smem_start +
 212                                          (fbi->fix.line_length * fbi->var.yres),
 213                                          fbi->fix.smem_start,
 214                                          0, 0);
 215         if (retval)
 216                 printf("ipu_init_channel_buffer error %d\n", retval);
 217
 218         return retval;
 219 }
 220
 221 /*
 222  * Set framebuffer parameters and change the operating mode.
 223  *
 224  * @param       info     framebuffer information pointer
 225  */
 226 static int mxcfb_set_par(struct fb_info *fbi)
 227 {
 228         int retval = 0;
 229         u32 mem_len;
 230         ipu_di_signal_cfg_t sig_cfg;
 231         struct mxcfb_info *mxc_fbi = fbi->par;
 232         uint32_t out_pixel_fmt;
 233
 234         ipu_disable_channel(mxc_fbi->ipu_ch);
 235         ipu_uninit_channel(mxc_fbi->ipu_ch);
 236         mxcfb_set_fix(fbi);
 237
 238         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 239         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 240                 if (fbi->fix.smem_start)
 241                         mxcfb_unmap_video_memory(fbi);
 242
 243                 if (mxcfb_map_video_memory(fbi) < 0)
 244                         return -ENOMEM;
 245         }
 246
 247         setup_disp_channel1(fbi);
 248
 249         memset(&sig_cfg, 0, sizeof(sig_cfg));
 250         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 251                 sig_cfg.interlaced = 1;
 252                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 253         } else {
 254                 if (mxc_fbi->ipu_di_pix_fmt)
 255                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 256                 else
 257                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 258         }
 259         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 260                 sig_cfg.odd_field_first = 1;
 261         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 262                 sig_cfg.ext_clk = 1;
 263         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 264                 sig_cfg.Hsync_pol = 1;
 265         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 266                 sig_cfg.Vsync_pol = 1;
 267         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 268                 sig_cfg.clk_pol = 1;
 269         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 270                 sig_cfg.data_pol = 1;
 271         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 272                 sig_cfg.enable_pol = 1;
 273         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 274                 sig_cfg.clkidle_en = 1;
 275
 276         debug("pixclock = %lu.%03lu MHz\n",
 277                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 278                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 279
 280         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 281                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 282                                 fbi->var.xres, fbi->var.yres,
 283                                 out_pixel_fmt,
 284                                 fbi->var.left_margin,
 285                                 fbi->var.hsync_len,
 286                                 fbi->var.right_margin,
 287                                 fbi->var.upper_margin,
 288                                 fbi->var.vsync_len,
 289                                 fbi->var.lower_margin,
 290                                 0, sig_cfg);
 291         if (retval != 0) {
 292                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 293                 return retval;
 294         }
 295
 296         retval = setup_disp_channel2(fbi);
 297         if (retval)
 298                 return retval;
 299
 300         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 301                 ipu_enable_channel(mxc_fbi->ipu_ch);
 302
 303         return retval;
 304 }
 305
 306 /*
 307  * Check framebuffer variable parameters and adjust to valid values.
 308  *
 309  * @param       var      framebuffer variable parameters
 310  *
 311  * @param       info     framebuffer information pointer
 312  */
 313 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 314 {
 315         u32 vtotal;
 316         u32 htotal;
 317
 318         if (var->xres_virtual < var->xres)
 319                 var->xres_virtual = var->xres;
 320         if (var->yres_virtual < var->yres)
 321                 var->yres_virtual = var->yres;
 322
 323         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 16) &&
 324                 (var->bits_per_pixel != 8))
 325                 var->bits_per_pixel = default_bpp;
 326
 327         switch (var->bits_per_pixel) {
 328         case 8:
 329                 var->red.length = 3;
 330                 var->red.offset = 5;
 331                 var->red.msb_right = 0;
 332
 333                 var->green.length = 3;
 334                 var->green.offset = 2;
 335                 var->green.msb_right = 0;
 336
 337                 var->blue.length = 2;
 338                 var->blue.offset = 0;
 339                 var->blue.msb_right = 0;
 340
 341                 var->transp.length = 0;
 342                 var->transp.offset = 0;
 343                 var->transp.msb_right = 0;
 344                 break;
 345
 346         case 16:
 347                 var->red.length = 5;
 348                 var->red.offset = 11;
 349                 var->red.msb_right = 0;
 350
 351                 var->green.length = 6;
 352                 var->green.offset = 5;
 353                 var->green.msb_right = 0;
 354
 355                 var->blue.length = 5;
 356                 var->blue.offset = 0;
 357                 var->blue.msb_right = 0;
 358
 359                 var->transp.length = 0;
 360                 var->transp.offset = 0;
 361                 var->transp.msb_right = 0;
 362                 break;
 363
 364         case 32:
 365                 var->red.length = 8;
 366                 var->red.offset = 16;
 367                 var->red.msb_right = 0;
 368
 369                 var->green.length = 8;
 370                 var->green.offset = 8;
 371                 var->green.msb_right = 0;
 372
 373                 var->blue.length = 8;
 374                 var->blue.offset = 0;
 375                 var->blue.msb_right = 0;
 376
 377                 var->transp.length = 8;
 378                 var->transp.offset = 24;
 379                 var->transp.msb_right = 0;
 380                 break;
 381         }
 382
 383         if (var->pixclock < 1000) {
 384                 htotal = var->xres + var->right_margin + var->hsync_len +
 385                     var->left_margin;
 386                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 387                     var->upper_margin;
 388                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 389                 var->pixclock = KHZ2PICOS(var->pixclock);
 390                 printf("pixclock set for 60Hz refresh = %u ps\n",
 391                         var->pixclock);
 392         }
 393
 394         var->height = -1;
 395         var->width = -1;
 396         var->grayscale = 0;
 397
 398         return 0;
 399 }
 400
 401 static int mxcfb_map_video_memory(struct fb_info *fbi)
 402 {
 403         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 404                 fbi->fix.smem_len = fbi->var.yres_virtual *
 405                                     fbi->fix.line_length;
 406         }
 407         if (gd->fb_base)
 408                 fbi->screen_base = (void *)gd->fb_base;
 409         else
 410                 fbi->screen_base = malloc(fbi->fix.smem_len);
 411         if (fbi->screen_base == NULL) {
 412                 puts("Unable to allocate framebuffer memory\n");
 413                 fbi->fix.smem_len = 0;
 414                 return -EBUSY;
 415         }
 416         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 417
 418         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 419                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 420
 421         fbi->screen_size = fbi->fix.smem_len;
 422
 423         /* Clear the screen */
 424         memset(fbi->screen_base, 0, fbi->fix.smem_len);
 425
 426         return 0;
 427 }
 428
 429 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 430 {
 431         fbi->screen_base = 0;
 432         fbi->fix.smem_start = 0;
 433         fbi->fix.smem_len = 0;
 434         return 0;
 435 }
 436
 437 /*
 438  * Initializes the framebuffer information pointer. After allocating
 439  * sufficient memory for the framebuffer structure, the fields are
 440  * filled with custom information passed in from the configurable
 441  * structures.  This includes information such as bits per pixel,
 442  * color maps, screen width/height and RGBA offsets.
 443  *
 444  * @return      Framebuffer structure initialized with our information
 445  */
 446 static struct fb_info *mxcfb_init_fbinfo(void)
 447 {
 448         struct fb_info *fbi;
 449         struct mxcfb_info *mxcfbi;
 450         void *p;
 451         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 452                 sizeof(struct fb_info);
 453
 454         debug("%s: %d %d %d\n",
 455                 __func__,
 456                 size,
 457                 sizeof(struct mxcfb_info),
 458                 sizeof(struct fb_info));
 459         /*
 460          * Allocate sufficient memory for the fb structure
 461          */
 462
 463         p = malloc(size);
 464         if (!p)
 465                 return NULL;
 466
 467         memset(p, 0, size);
 468
 469         fbi = p;
 470         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 471
 472         mxcfbi = fbi->par;
 473         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 474                 fbi, mxcfbi);
 475
 476         fbi->var.activate = FB_ACTIVATE_NOW;
 477
 478         fbi->flags = FBINFO_FLAG_DEFAULT;
 479         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 480
 481         return fbi;
 482 }
 483
 484 /*
 485  * Probe routine for the framebuffer driver. It is called during the
 486  * driver binding process.      The following functions are performed in
 487  * this routine: Framebuffer initialization, Memory allocation and
 488  * mapping, Framebuffer registration, IPU initialization.
 489  *
 490  * @return      Appropriate error code to the kernel common code
 491  */
 492 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 493                         struct fb_videomode *mode)
 494 {
 495         struct fb_info *fbi;
 496         struct mxcfb_info *mxcfbi;
 497
 498         /*
 499          * Initialize FB structures
 500          */
 501         fbi = mxcfb_init_fbinfo();
 502         if (!fbi)
 503                 return -ENOMEM;
 504
 505         mxcfbi = fbi->par;
 506
 507         if (!g_dp_in_use) {
 508                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 509                 mxcfbi->blank = FB_BLANK_UNBLANK;
 510         } else {
 511                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 512                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 513         }
 514
 515         mxcfbi->ipu_di = disp;
 516
 517         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 518         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 519         strcpy(fbi->fix.id, "DISP3 BG");
 520
 521         g_dp_in_use = 1;
 522
 523         mxcfb_info[mxcfbi->ipu_di] = fbi;
 524
 525         /* Need dummy values until real panel is configured */
 526
 527         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 528         fb_videomode_to_var(&fbi->var, mode);
 529         fbi->var.bits_per_pixel = default_bpp;
 530         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 531         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 532
 533         mxcfb_check_var(&fbi->var, fbi);
 534         mxcfb_set_fix(fbi);
 535
 536         /* allocate fb first */
 537         if (mxcfb_map_video_memory(fbi) < 0)
 538                 return -ENOMEM;
 539
 540         mxcfb_set_par(fbi);
 541
 542         panel.winSizeX = mode->xres;
 543         panel.winSizeY = mode->yres;
 544         panel.plnSizeX = mode->xres;
 545         panel.plnSizeY = mode->yres;
 546
 547         panel.frameAdrs = (u32)fbi->screen_base;
 548         panel.memSize = fbi->screen_size;
 549
 550         switch (fbi->var.bits_per_pixel) {
 551         case 8:
 552                 panel.gdfBytesPP = 1;
 553                 panel.gdfIndex = GDF__8BIT_INDEX;
 554                 break;
 555
 556         case 16:
 557                 panel.gdfBytesPP = 2;
 558                 panel.gdfIndex = GDF_16BIT_565RGB;
 559                 break;
 560
 561         case 32:
 562                 panel.gdfBytesPP = 4;
 563                 panel.gdfIndex = GDF_32BIT_X888RGB;
 564                 break;
 565
 566         default:
 567                 hang();
 568         }
 569
 570         ipu_dump_registers();
 571
 572         return 0;
 573 }
 574
 575 void mxcfb_disable(void)
 576 {
 577         ipu_disable_channel(MEM_BG_SYNC);
 578         ipu_uninit_channel(MEM_BG_SYNC);
 579 }
 580
 581 void *video_hw_init(void)
 582 {
 583         int ret;
 584
 585         ret = ipu_probe();
 586         if (ret)
 587                 puts("Error initializing IPU\n");
 588
 589         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 590         debug("Framebuffer at 0x%08x\n", panel.frameAdrs);
 591
 592         return &panel;
 593 }
 594
 595 void video_set_lut(unsigned int index, /* color number */
 596                         unsigned char r,    /* red */
 597                         unsigned char g,    /* green */
 598                         unsigned char b     /* blue */
 599                         )
 600 {
 601         return;
 602 }
 603
 604 int mx5_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt, int bpp)
 605 {
 606         gmode = mode;
 607         gdisp = disp;
 608         gpixfmt = pixfmt;
 609         default_bpp = bpp;
 610
 611         return 0;
 612 }