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 #include "ipu_regs.h"
  42
  43 static int mxcfb_map_video_memory(struct fb_info *fbi);
  44 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  45
  46 /* graphics setup */
  47 static GraphicDevice panel;
  48 static struct fb_videomode const *gmode;
  49 static uint8_t gdisp;
  50 static uint32_t gpixfmt;
  51
  52 void fb_videomode_to_var(struct fb_var_screeninfo *var,
  53                          const struct fb_videomode *mode)
  54 {
  55         var->xres = mode->xres;
  56         var->yres = mode->yres;
  57         var->xres_virtual = mode->xres;
  58         var->yres_virtual = mode->yres;
  59         var->xoffset = 0;
  60         var->yoffset = 0;
  61         var->pixclock = mode->pixclock;
  62         var->left_margin = mode->left_margin;
  63         var->right_margin = mode->right_margin;
  64         var->upper_margin = mode->upper_margin;
  65         var->lower_margin = mode->lower_margin;
  66         var->hsync_len = mode->hsync_len;
  67         var->vsync_len = mode->vsync_len;
  68         var->sync = mode->sync;
  69         var->vmode = mode->vmode & FB_VMODE_MASK;
  70 }
  71
  72 /*
  73  * Structure containing the MXC specific framebuffer information.
  74  */
  75 struct mxcfb_info {
  76         int blank;
  77         ipu_channel_t ipu_ch;
  78         int ipu_di;
  79         u32 ipu_di_pix_fmt;
  80         unsigned char overlay;
  81         unsigned char alpha_chan_en;
  82         dma_addr_t alpha_phy_addr0;
  83         dma_addr_t alpha_phy_addr1;
  84         void *alpha_virt_addr0;
  85         void *alpha_virt_addr1;
  86         uint32_t alpha_mem_len;
  87         uint32_t cur_ipu_buf;
  88         uint32_t cur_ipu_alpha_buf;
  89
  90         u32 pseudo_palette[16];
  91 };
  92
  93 enum {
  94         BOTH_ON,
  95         SRC_ON,
  96         TGT_ON,
  97         BOTH_OFF
  98 };
  99
 100 static unsigned long default_bpp = 16;
 101 static unsigned char g_dp_in_use;
 102 static struct fb_info *mxcfb_info[3];
 103 static int ext_clk_used;
 104
 105 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 106 {
 107         uint32_t pixfmt = 0;
 108
 109         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 110
 111         if (fbi->var.nonstd)
 112                 return fbi->var.nonstd;
 113
 114         switch (fbi->var.bits_per_pixel) {
 115         case 24:
 116                 pixfmt = IPU_PIX_FMT_BGR24;
 117                 break;
 118         case 32:
 119                 pixfmt = IPU_PIX_FMT_BGR32;
 120                 break;
 121         case 16:
 122                 pixfmt = IPU_PIX_FMT_RGB565;
 123                 break;
 124         }
 125         return pixfmt;
 126 }
 127
 128 /*
 129  * Set fixed framebuffer parameters based on variable settings.
 130  *
 131  * @param       info     framebuffer information pointer
 132  */
 133 static int mxcfb_set_fix(struct fb_info *info)
 134 {
 135         struct fb_fix_screeninfo *fix = &info->fix;
 136         struct fb_var_screeninfo *var = &info->var;
 137
 138         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 139
 140         fix->type = FB_TYPE_PACKED_PIXELS;
 141         fix->accel = FB_ACCEL_NONE;
 142         fix->visual = FB_VISUAL_TRUECOLOR;
 143         fix->xpanstep = 1;
 144         fix->ypanstep = 1;
 145
 146         return 0;
 147 }
 148
 149 static int setup_disp_channel1(struct fb_info *fbi)
 150 {
 151         ipu_channel_params_t params;
 152         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 153
 154         memset(&params, 0, sizeof(params));
 155         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 156
 157         debug("%s called\n", __func__);
 158         /*
 159          * Assuming interlaced means yuv output, below setting also
 160          * valid for mem_dc_sync. FG should have the same vmode as BG.
 161          */
 162         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 163                 params.mem_dp_bg_sync.interlaced = 1;
 164                 params.mem_dp_bg_sync.out_pixel_fmt =
 165                         IPU_PIX_FMT_YUV444;
 166         } else {
 167                 if (mxc_fbi->ipu_di_pix_fmt) {
 168                         params.mem_dp_bg_sync.out_pixel_fmt =
 169                                 mxc_fbi->ipu_di_pix_fmt;
 170                 } else {
 171                         params.mem_dp_bg_sync.out_pixel_fmt =
 172                                 IPU_PIX_FMT_RGB666;
 173                 }
 174         }
 175         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 176         if (mxc_fbi->alpha_chan_en)
 177                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 178
 179         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 180
 181         return 0;
 182 }
 183
 184 static int setup_disp_channel2(struct fb_info *fbi)
 185 {
 186         int retval = 0;
 187         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 188
 189         mxc_fbi->cur_ipu_buf = 1;
 190         if (mxc_fbi->alpha_chan_en)
 191                 mxc_fbi->cur_ipu_alpha_buf = 1;
 192
 193         fbi->var.xoffset = fbi->var.yoffset = 0;
 194
 195         debug("%s: %x %d %d %d %lx %lx\n",
 196                 __func__,
 197                 mxc_fbi->ipu_ch,
 198                 fbi->var.xres,
 199                 fbi->var.yres,
 200                 fbi->fix.line_length,
 201                 fbi->fix.smem_start,
 202                 fbi->fix.smem_start +
 203                 (fbi->fix.line_length * fbi->var.yres));
 204
 205         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 206                                          bpp_to_pixfmt(fbi),
 207                                          fbi->var.xres, fbi->var.yres,
 208                                          fbi->fix.line_length,
 209                                          fbi->fix.smem_start +
 210                                          (fbi->fix.line_length * fbi->var.yres),
 211                                          fbi->fix.smem_start,
 212                                          0, 0);
 213         if (retval)
 214                 printf("ipu_init_channel_buffer error %d\n", retval);
 215
 216         return retval;
 217 }
 218
 219 /*
 220  * Set framebuffer parameters and change the operating mode.
 221  *
 222  * @param       info     framebuffer information pointer
 223  */
 224 static int mxcfb_set_par(struct fb_info *fbi)
 225 {
 226         int retval = 0;
 227         u32 mem_len;
 228         ipu_di_signal_cfg_t sig_cfg;
 229         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 230         uint32_t out_pixel_fmt;
 231
 232         ipu_disable_channel(mxc_fbi->ipu_ch);
 233         ipu_uninit_channel(mxc_fbi->ipu_ch);
 234         mxcfb_set_fix(fbi);
 235
 236         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 237         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 238                 if (fbi->fix.smem_start)
 239                         mxcfb_unmap_video_memory(fbi);
 240
 241                 if (mxcfb_map_video_memory(fbi) < 0)
 242                         return -ENOMEM;
 243         }
 244
 245         setup_disp_channel1(fbi);
 246
 247         memset(&sig_cfg, 0, sizeof(sig_cfg));
 248         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 249                 sig_cfg.interlaced = 1;
 250                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 251         } else {
 252                 if (mxc_fbi->ipu_di_pix_fmt)
 253                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 254                 else
 255                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 256         }
 257         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 258                 sig_cfg.odd_field_first = 1;
 259         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 260                 sig_cfg.ext_clk = 1;
 261         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 262                 sig_cfg.Hsync_pol = 1;
 263         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 264                 sig_cfg.Vsync_pol = 1;
 265         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 266                 sig_cfg.clk_pol = 1;
 267         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 268                 sig_cfg.data_pol = 1;
 269         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 270                 sig_cfg.enable_pol = 1;
 271         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 272                 sig_cfg.clkidle_en = 1;
 273
 274         debug("pixclock = %ul Hz\n",
 275                 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 276
 277         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 278                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 279                                 fbi->var.xres, fbi->var.yres,
 280                                 out_pixel_fmt,
 281                                 fbi->var.left_margin,
 282                                 fbi->var.hsync_len,
 283                                 fbi->var.right_margin,
 284                                 fbi->var.upper_margin,
 285                                 fbi->var.vsync_len,
 286                                 fbi->var.lower_margin,
 287                                 0, sig_cfg) != 0) {
 288                 puts("mxcfb: Error initializing panel.\n");
 289                 return -EINVAL;
 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 != 24) &&
 320             (var->bits_per_pixel != 16) && (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         case 24:
 359                 var->red.length = 8;
 360                 var->red.offset = 16;
 361                 var->red.msb_right = 0;
 362
 363                 var->green.length = 8;
 364                 var->green.offset = 8;
 365                 var->green.msb_right = 0;
 366
 367                 var->blue.length = 8;
 368                 var->blue.offset = 0;
 369                 var->blue.msb_right = 0;
 370
 371                 var->transp.length = 0;
 372                 var->transp.offset = 0;
 373                 var->transp.msb_right = 0;
 374                 break;
 375         case 32:
 376                 var->red.length = 8;
 377                 var->red.offset = 16;
 378                 var->red.msb_right = 0;
 379
 380                 var->green.length = 8;
 381                 var->green.offset = 8;
 382                 var->green.msb_right = 0;
 383
 384                 var->blue.length = 8;
 385                 var->blue.offset = 0;
 386                 var->blue.msb_right = 0;
 387
 388                 var->transp.length = 8;
 389                 var->transp.offset = 24;
 390                 var->transp.msb_right = 0;
 391                 break;
 392         }
 393
 394         if (var->pixclock < 1000) {
 395                 htotal = var->xres + var->right_margin + var->hsync_len +
 396                     var->left_margin;
 397                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 398                     var->upper_margin;
 399                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 400                 var->pixclock = KHZ2PICOS(var->pixclock);
 401                 printf("pixclock set for 60Hz refresh = %u ps\n",
 402                         var->pixclock);
 403         }
 404
 405         var->height = -1;
 406         var->width = -1;
 407         var->grayscale = 0;
 408
 409         return 0;
 410 }
 411
 412 static int mxcfb_map_video_memory(struct fb_info *fbi)
 413 {
 414         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 415                 fbi->fix.smem_len = fbi->var.yres_virtual *
 416                                     fbi->fix.line_length;
 417         }
 418
 419         fbi->screen_base = (char *)malloc(fbi->fix.smem_len);
 420         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 421         if (fbi->screen_base == 0) {
 422                 puts("Unable to allocate framebuffer memory\n");
 423                 fbi->fix.smem_len = 0;
 424                 fbi->fix.smem_start = 0;
 425                 return -EBUSY;
 426         }
 427
 428         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 429                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 430
 431         fbi->screen_size = fbi->fix.smem_len;
 432
 433         /* Clear the screen */
 434         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 435
 436         return 0;
 437 }
 438
 439 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 440 {
 441         fbi->screen_base = 0;
 442         fbi->fix.smem_start = 0;
 443         fbi->fix.smem_len = 0;
 444         return 0;
 445 }
 446
 447 /*
 448  * Initializes the framebuffer information pointer. After allocating
 449  * sufficient memory for the framebuffer structure, the fields are
 450  * filled with custom information passed in from the configurable
 451  * structures.  This includes information such as bits per pixel,
 452  * color maps, screen width/height and RGBA offsets.
 453  *
 454  * @return      Framebuffer structure initialized with our information
 455  */
 456 static struct fb_info *mxcfb_init_fbinfo(void)
 457 {
 458 #define BYTES_PER_LONG 4
 459 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 460         struct fb_info *fbi;
 461         struct mxcfb_info *mxcfbi;
 462         char *p;
 463         int size = sizeof(struct mxcfb_info) + PADDING +
 464                 sizeof(struct fb_info);
 465
 466         debug("%s: %d %d %d %d\n",
 467                 __func__,
 468                 PADDING,
 469                 size,
 470                 sizeof(struct mxcfb_info),
 471                 sizeof(struct fb_info));
 472         /*
 473          * Allocate sufficient memory for the fb structure
 474          */
 475
 476         p = malloc(size);
 477         if (!p)
 478                 return NULL;
 479
 480         memset(p, 0, size);
 481
 482         fbi = (struct fb_info *)p;
 483         fbi->par = p + sizeof(struct fb_info) + PADDING;
 484
 485         mxcfbi = (struct mxcfb_info *)fbi->par;
 486         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 487                 (unsigned int)fbi, (unsigned int)mxcfbi);
 488
 489         fbi->var.activate = FB_ACTIVATE_NOW;
 490
 491         fbi->flags = FBINFO_FLAG_DEFAULT;
 492         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 493
 494         return fbi;
 495 }
 496
 497 /*
 498  * Probe routine for the framebuffer driver. It is called during the
 499  * driver binding process.      The following functions are performed in
 500  * this routine: Framebuffer initialization, Memory allocation and
 501  * mapping, Framebuffer registration, IPU initialization.
 502  *
 503  * @return      Appropriate error code to the kernel common code
 504  */
 505 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 506                         struct fb_videomode const *mode)
 507 {
 508         struct fb_info *fbi;
 509         struct mxcfb_info *mxcfbi;
 510         int ret = 0;
 511
 512         /*
 513          * Initialize FB structures
 514          */
 515         fbi = mxcfb_init_fbinfo();
 516         if (!fbi) {
 517                 ret = -ENOMEM;
 518                 goto err0;
 519         }
 520         mxcfbi = (struct mxcfb_info *)fbi->par;
 521
 522         if (!g_dp_in_use) {
 523                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 524                 mxcfbi->blank = FB_BLANK_UNBLANK;
 525         } else {
 526                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 527                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 528         }
 529
 530         mxcfbi->ipu_di = disp;
 531
 532         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 533         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 534         strcpy(fbi->fix.id, "DISP3 BG");
 535
 536         g_dp_in_use = 1;
 537
 538         mxcfb_info[mxcfbi->ipu_di] = fbi;
 539
 540         /* Need dummy values until real panel is configured */
 541
 542         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 543         fb_videomode_to_var(&fbi->var, mode);
 544         fbi->var.bits_per_pixel = 16;
 545         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 546         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 547
 548         mxcfb_check_var(&fbi->var, fbi);
 549
 550         /* Default Y virtual size is 2x panel size */
 551         fbi->var.yres_virtual = fbi->var.yres * 2;
 552
 553         mxcfb_set_fix(fbi);
 554
 555         /* alocate fb first */
 556         if (mxcfb_map_video_memory(fbi) < 0)
 557                 return -ENOMEM;
 558
 559         mxcfb_set_par(fbi);
 560
 561         panel.winSizeX = mode->xres;
 562         panel.winSizeY = mode->yres;
 563         panel.plnSizeX = mode->xres;
 564         panel.plnSizeY = mode->yres;
 565
 566         panel.frameAdrs = (u32)fbi->screen_base;
 567         panel.memSize = fbi->screen_size;
 568
 569         panel.gdfBytesPP = 2;
 570         panel.gdfIndex = GDF_16BIT_565RGB;
 571
 572         ipu_dump_registers();
 573
 574         return 0;
 575
 576 err0:
 577         return ret;
 578 }
 579
 580 void ipuv3_fb_shutdown(void)
 581 {
 582         int i;
 583         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 584
 585         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 586                 struct fb_info *fbi = mxcfb_info[i];
 587                 if (fbi) {
 588                         struct mxcfb_info *mxc_fbi = fbi->par;
 589                         ipu_disable_channel(mxc_fbi->ipu_ch);
 590                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 591                 }
 592         }
 593         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 594                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 595                              &stat->int_stat[i]);
 596         }
 597 }
 598
 599 void *video_hw_init(void)
 600 {
 601         int ret;
 602
 603         ret = ipu_probe();
 604         if (ret)
 605                 puts("Error initializing IPU\n");
 606
 607         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 608         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 609
 610         return (void *)&panel;
 611 }
 612
 613 void video_set_lut(unsigned int index, /* color number */
 614                         unsigned char r,    /* red */
 615                         unsigned char g,    /* green */
 616                         unsigned char b     /* blue */
 617                         )
 618 {
 619         return;
 620 }
 621
 622 int ipuv3_fb_init(struct fb_videomode const *mode,
 623                   uint8_t disp,
 624                   uint32_t pixfmt)
 625 {
 626         gmode = mode;
 627         gdisp = disp;
 628         gpixfmt = pixfmt;
 629
 630         return 0;
 631 }