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 struct fb_videomode *gmode;
  48
  49 void fb_videomode_to_var(struct fb_var_screeninfo *var,
  50                          const struct fb_videomode *mode)
  51 {
  52         var->xres = mode->xres;
  53         var->yres = mode->yres;
  54         var->xres_virtual = mode->xres;
  55         var->yres_virtual = mode->yres;
  56         var->xoffset = 0;
  57         var->yoffset = 0;
  58         var->pixclock = mode->pixclock;
  59         var->left_margin = mode->left_margin;
  60         var->right_margin = mode->right_margin;
  61         var->upper_margin = mode->upper_margin;
  62         var->lower_margin = mode->lower_margin;
  63         var->hsync_len = mode->hsync_len;
  64         var->vsync_len = mode->vsync_len;
  65         var->sync = mode->sync;
  66         var->vmode = mode->vmode & FB_VMODE_MASK;
  67 }
  68
  69 /*
  70  * Structure containing the MXC specific framebuffer information.
  71  */
  72 struct mxcfb_info {
  73         int blank;
  74         ipu_channel_t ipu_ch;
  75         int ipu_di;
  76         u32 ipu_di_pix_fmt;
  77         unsigned char overlay;
  78         unsigned char alpha_chan_en;
  79         dma_addr_t alpha_phy_addr0;
  80         dma_addr_t alpha_phy_addr1;
  81         void *alpha_virt_addr0;
  82         void *alpha_virt_addr1;
  83         uint32_t alpha_mem_len;
  84         uint32_t cur_ipu_buf;
  85         uint32_t cur_ipu_alpha_buf;
  86
  87         u32 pseudo_palette[16];
  88 };
  89
  90 enum {
  91         BOTH_ON,
  92         SRC_ON,
  93         TGT_ON,
  94         BOTH_OFF
  95 };
  96
  97 static unsigned long default_bpp = 16;
  98 static unsigned char g_dp_in_use;
  99 static struct fb_info *mxcfb_info[3];
 100 static int ext_clk_used;
 101
 102 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 103 {
 104         uint32_t pixfmt = 0;
 105
 106         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 107
 108         if (fbi->var.nonstd)
 109                 return fbi->var.nonstd;
 110
 111         switch (fbi->var.bits_per_pixel) {
 112         case 24:
 113                 pixfmt = IPU_PIX_FMT_BGR24;
 114                 break;
 115         case 32:
 116                 pixfmt = IPU_PIX_FMT_BGR32;
 117                 break;
 118         case 16:
 119                 pixfmt = IPU_PIX_FMT_RGB565;
 120                 break;
 121         }
 122         return pixfmt;
 123 }
 124
 125 /*
 126  * Set fixed framebuffer parameters based on variable settings.
 127  *
 128  * @param       info     framebuffer information pointer
 129  */
 130 static int mxcfb_set_fix(struct fb_info *info)
 131 {
 132         struct fb_fix_screeninfo *fix = &info->fix;
 133         struct fb_var_screeninfo *var = &info->var;
 134
 135         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 136
 137         fix->type = FB_TYPE_PACKED_PIXELS;
 138         fix->accel = FB_ACCEL_NONE;
 139         fix->visual = FB_VISUAL_TRUECOLOR;
 140         fix->xpanstep = 1;
 141         fix->ypanstep = 1;
 142
 143         return 0;
 144 }
 145
 146 static int setup_disp_channel1(struct fb_info *fbi)
 147 {
 148         ipu_channel_params_t params;
 149         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 150
 151         memset(&params, 0, sizeof(params));
 152         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 153
 154         debug("%s called\n", __func__);
 155         /*
 156          * Assuming interlaced means yuv output, below setting also
 157          * valid for mem_dc_sync. FG should have the same vmode as BG.
 158          */
 159         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 160                 params.mem_dp_bg_sync.interlaced = 1;
 161                 params.mem_dp_bg_sync.out_pixel_fmt =
 162                         IPU_PIX_FMT_YUV444;
 163         } else {
 164                 if (mxc_fbi->ipu_di_pix_fmt) {
 165                         params.mem_dp_bg_sync.out_pixel_fmt =
 166                                 mxc_fbi->ipu_di_pix_fmt;
 167                 } else {
 168                         params.mem_dp_bg_sync.out_pixel_fmt =
 169                                 IPU_PIX_FMT_RGB666;
 170                 }
 171         }
 172         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 173         if (mxc_fbi->alpha_chan_en)
 174                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 175
 176         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 177
 178         return 0;
 179 }
 180
 181 static int setup_disp_channel2(struct fb_info *fbi)
 182 {
 183         int retval = 0;
 184         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 185
 186         mxc_fbi->cur_ipu_buf = 1;
 187         if (mxc_fbi->alpha_chan_en)
 188                 mxc_fbi->cur_ipu_alpha_buf = 1;
 189
 190         fbi->var.xoffset = fbi->var.yoffset = 0;
 191
 192         debug("%s: %x %d %d %d %lx %lx\n",
 193                 __func__,
 194                 mxc_fbi->ipu_ch,
 195                 fbi->var.xres,
 196                 fbi->var.yres,
 197                 fbi->fix.line_length,
 198                 fbi->fix.smem_start,
 199                 fbi->fix.smem_start +
 200                 (fbi->fix.line_length * fbi->var.yres));
 201
 202         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 203                                          bpp_to_pixfmt(fbi),
 204                                          fbi->var.xres, fbi->var.yres,
 205                                          fbi->fix.line_length,
 206                                          fbi->fix.smem_start +
 207                                          (fbi->fix.line_length * fbi->var.yres),
 208                                          fbi->fix.smem_start,
 209                                          0, 0);
 210         if (retval)
 211                 printf("ipu_init_channel_buffer error %d\n", retval);
 212
 213         return retval;
 214 }
 215
 216 /*
 217  * Set framebuffer parameters and change the operating mode.
 218  *
 219  * @param       info     framebuffer information pointer
 220  */
 221 static int mxcfb_set_par(struct fb_info *fbi)
 222 {
 223         int retval = 0;
 224         u32 mem_len;
 225         ipu_di_signal_cfg_t sig_cfg;
 226         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 227         uint32_t out_pixel_fmt;
 228
 229         ipu_disable_channel(mxc_fbi->ipu_ch);
 230         ipu_uninit_channel(mxc_fbi->ipu_ch);
 231         mxcfb_set_fix(fbi);
 232
 233         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 234         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 235                 if (fbi->fix.smem_start)
 236                         mxcfb_unmap_video_memory(fbi);
 237
 238                 if (mxcfb_map_video_memory(fbi) < 0)
 239                         return -ENOMEM;
 240         }
 241
 242         setup_disp_channel1(fbi);
 243
 244         memset(&sig_cfg, 0, sizeof(sig_cfg));
 245         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 246                 sig_cfg.interlaced = 1;
 247                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 248         } else {
 249                 if (mxc_fbi->ipu_di_pix_fmt)
 250                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 251                 else
 252                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 253         }
 254         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 255                 sig_cfg.odd_field_first = 1;
 256         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 257                 sig_cfg.ext_clk = 1;
 258         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 259                 sig_cfg.Hsync_pol = 1;
 260         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 261                 sig_cfg.Vsync_pol = 1;
 262         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 263                 sig_cfg.clk_pol = 1;
 264         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 265                 sig_cfg.data_pol = 1;
 266         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 267                 sig_cfg.enable_pol = 1;
 268         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 269                 sig_cfg.clkidle_en = 1;
 270
 271         debug("pixclock = %ul Hz\n",
 272                 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 273
 274         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 275                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 276                                 fbi->var.xres, fbi->var.yres,
 277                                 out_pixel_fmt,
 278                                 fbi->var.left_margin,
 279                                 fbi->var.hsync_len,
 280                                 fbi->var.right_margin,
 281                                 fbi->var.upper_margin,
 282                                 fbi->var.vsync_len,
 283                                 fbi->var.lower_margin,
 284                                 0, sig_cfg) != 0) {
 285                 puts("mxcfb: Error initializing panel.\n");
 286                 return -EINVAL;
 287         }
 288
 289         retval = setup_disp_channel2(fbi);
 290         if (retval)
 291                 return retval;
 292
 293         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 294                 ipu_enable_channel(mxc_fbi->ipu_ch);
 295
 296         return retval;
 297 }
 298
 299 /*
 300  * Check framebuffer variable parameters and adjust to valid values.
 301  *
 302  * @param       var      framebuffer variable parameters
 303  *
 304  * @param       info     framebuffer information pointer
 305  */
 306 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 307 {
 308         u32 vtotal;
 309         u32 htotal;
 310
 311         if (var->xres_virtual < var->xres)
 312                 var->xres_virtual = var->xres;
 313         if (var->yres_virtual < var->yres)
 314                 var->yres_virtual = var->yres;
 315
 316         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 317             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 318                 var->bits_per_pixel = default_bpp;
 319
 320         switch (var->bits_per_pixel) {
 321         case 8:
 322                 var->red.length = 3;
 323                 var->red.offset = 5;
 324                 var->red.msb_right = 0;
 325
 326                 var->green.length = 3;
 327                 var->green.offset = 2;
 328                 var->green.msb_right = 0;
 329
 330                 var->blue.length = 2;
 331                 var->blue.offset = 0;
 332                 var->blue.msb_right = 0;
 333
 334                 var->transp.length = 0;
 335                 var->transp.offset = 0;
 336                 var->transp.msb_right = 0;
 337                 break;
 338         case 16:
 339                 var->red.length = 5;
 340                 var->red.offset = 11;
 341                 var->red.msb_right = 0;
 342
 343                 var->green.length = 6;
 344                 var->green.offset = 5;
 345                 var->green.msb_right = 0;
 346
 347                 var->blue.length = 5;
 348                 var->blue.offset = 0;
 349                 var->blue.msb_right = 0;
 350
 351                 var->transp.length = 0;
 352                 var->transp.offset = 0;
 353                 var->transp.msb_right = 0;
 354                 break;
 355         case 24:
 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 = 0;
 369                 var->transp.offset = 0;
 370                 var->transp.msb_right = 0;
 371                 break;
 372         case 32:
 373                 var->red.length = 8;
 374                 var->red.offset = 16;
 375                 var->red.msb_right = 0;
 376
 377                 var->green.length = 8;
 378                 var->green.offset = 8;
 379                 var->green.msb_right = 0;
 380
 381                 var->blue.length = 8;
 382                 var->blue.offset = 0;
 383                 var->blue.msb_right = 0;
 384
 385                 var->transp.length = 8;
 386                 var->transp.offset = 24;
 387                 var->transp.msb_right = 0;
 388                 break;
 389         }
 390
 391         if (var->pixclock < 1000) {
 392                 htotal = var->xres + var->right_margin + var->hsync_len +
 393                     var->left_margin;
 394                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 395                     var->upper_margin;
 396                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 397                 var->pixclock = KHZ2PICOS(var->pixclock);
 398                 printf("pixclock set for 60Hz refresh = %u ps\n",
 399                         var->pixclock);
 400         }
 401
 402         var->height = -1;
 403         var->width = -1;
 404         var->grayscale = 0;
 405
 406         return 0;
 407 }
 408
 409 static int mxcfb_map_video_memory(struct fb_info *fbi)
 410 {
 411         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 412                 fbi->fix.smem_len = fbi->var.yres_virtual *
 413                                     fbi->fix.line_length;
 414         }
 415
 416         fbi->screen_base = (char *)malloc(fbi->fix.smem_len);
 417         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 418         if (fbi->screen_base == 0) {
 419                 puts("Unable to allocate framebuffer memory\n");
 420                 fbi->fix.smem_len = 0;
 421                 fbi->fix.smem_start = 0;
 422                 return -EBUSY;
 423         }
 424
 425         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 426                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 427
 428         fbi->screen_size = fbi->fix.smem_len;
 429
 430         /* Clear the screen */
 431         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 432
 433         return 0;
 434 }
 435
 436 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 437 {
 438         fbi->screen_base = 0;
 439         fbi->fix.smem_start = 0;
 440         fbi->fix.smem_len = 0;
 441         return 0;
 442 }
 443
 444 /*
 445  * Initializes the framebuffer information pointer. After allocating
 446  * sufficient memory for the framebuffer structure, the fields are
 447  * filled with custom information passed in from the configurable
 448  * structures.  This includes information such as bits per pixel,
 449  * color maps, screen width/height and RGBA offsets.
 450  *
 451  * @return      Framebuffer structure initialized with our information
 452  */
 453 static struct fb_info *mxcfb_init_fbinfo(void)
 454 {
 455 #define BYTES_PER_LONG 4
 456 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 457         struct fb_info *fbi;
 458         struct mxcfb_info *mxcfbi;
 459         char *p;
 460         int size = sizeof(struct mxcfb_info) + PADDING +
 461                 sizeof(struct fb_info);
 462
 463         debug("%s: %d %d %d %d\n",
 464                 __func__,
 465                 PADDING,
 466                 size,
 467                 sizeof(struct mxcfb_info),
 468                 sizeof(struct fb_info));
 469         /*
 470          * Allocate sufficient memory for the fb structure
 471          */
 472
 473         p = malloc(size);
 474         if (!p)
 475                 return NULL;
 476
 477         memset(p, 0, size);
 478
 479         fbi = (struct fb_info *)p;
 480         fbi->par = p + sizeof(struct fb_info) + PADDING;
 481
 482         mxcfbi = (struct mxcfb_info *)fbi->par;
 483         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 484                 (unsigned int)fbi, (unsigned int)mxcfbi);
 485
 486         fbi->var.activate = FB_ACTIVATE_NOW;
 487
 488         fbi->flags = FBINFO_FLAG_DEFAULT;
 489         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 490
 491         return fbi;
 492 }
 493
 494 /*
 495  * Probe routine for the framebuffer driver. It is called during the
 496  * driver binding process.      The following functions are performed in
 497  * this routine: Framebuffer initialization, Memory allocation and
 498  * mapping, Framebuffer registration, IPU initialization.
 499  *
 500  * @return      Appropriate error code to the kernel common code
 501  */
 502 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode)
 503 {
 504         struct fb_info *fbi;
 505         struct mxcfb_info *mxcfbi;
 506         int ret = 0;
 507
 508         /*
 509          * Initialize FB structures
 510          */
 511         fbi = mxcfb_init_fbinfo();
 512         if (!fbi) {
 513                 ret = -ENOMEM;
 514                 goto err0;
 515         }
 516         mxcfbi = (struct mxcfb_info *)fbi->par;
 517
 518         if (!g_dp_in_use) {
 519                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 520                 mxcfbi->blank = FB_BLANK_UNBLANK;
 521         } else {
 522                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 523                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 524         }
 525
 526         mxcfbi->ipu_di = 0;
 527
 528         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 529         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 530         strcpy(fbi->fix.id, "DISP3 BG");
 531
 532         g_dp_in_use = 1;
 533
 534         mxcfb_info[mxcfbi->ipu_di] = fbi;
 535
 536         /* Need dummy values until real panel is configured */
 537
 538         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 539         fb_videomode_to_var(&fbi->var, mode);
 540         fbi->var.bits_per_pixel = 16;
 541         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 542         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 543
 544         mxcfb_check_var(&fbi->var, fbi);
 545
 546         /* Default Y virtual size is 2x panel size */
 547         fbi->var.yres_virtual = fbi->var.yres * 2;
 548
 549         mxcfb_set_fix(fbi);
 550
 551         /* alocate fb first */
 552         if (mxcfb_map_video_memory(fbi) < 0)
 553                 return -ENOMEM;
 554
 555         mxcfb_set_par(fbi);
 556
 557         panel.winSizeX = mode->xres;
 558         panel.winSizeY = mode->yres;
 559         panel.plnSizeX = mode->xres;
 560         panel.plnSizeY = mode->yres;
 561
 562         panel.frameAdrs = (u32)fbi->screen_base;
 563         panel.memSize = fbi->screen_size;
 564
 565         panel.gdfBytesPP = 2;
 566         panel.gdfIndex = GDF_16BIT_565RGB;
 567
 568         ipu_dump_registers();
 569
 570         return 0;
 571
 572 err0:
 573         return ret;
 574 }
 575
 576 void *video_hw_init(void)
 577 {
 578         int ret;
 579
 580         ret = ipu_probe();
 581         if (ret)
 582                 puts("Error initializing IPU\n");
 583
 584         ret = mxcfb_probe(IPU_PIX_FMT_RGB666, gmode);
 585         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 586
 587         return (void *)&panel;
 588 }
 589
 590 void video_set_lut(unsigned int index, /* color number */
 591                         unsigned char r,    /* red */
 592                         unsigned char g,    /* green */
 593                         unsigned char b     /* blue */
 594                         )
 595 {
 596         return;
 597 }
 598
 599 int mx51_fb_init(struct fb_videomode *mode)
 600 {
 601         gmode = mode;
 602
 603         return 0;
 604 }