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