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 /* #define DEBUG */
  31 #include <common.h>
  32 #include <asm/errno.h>
  33 #include <linux/string.h>
  34 #include <linux/list.h>
  35 #include <linux/fb.h>
  36 #include <asm/io.h>
  37 #include <malloc.h>
  38 #include <lcd.h>
  39 #include "videomodes.h"
  40 #include "ipu.h"
  41 #include "mxcfb.h"
  42
  43 DECLARE_GLOBAL_DATA_PTR;
  44
  45 void *lcd_base;                 /* Start of framebuffer memory  */
  46 void *lcd_console_address;      /* Start of console buffer      */
  47
  48 int lcd_line_length;
  49 int lcd_color_fg;
  50 int lcd_color_bg;
  51
  52 short console_col;
  53 short console_row;
  54
  55 vidinfo_t panel_info;
  56
  57 static int mxcfb_map_video_memory(struct fb_info *fbi);
  58 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  59
  60 void lcd_initcolregs(void)
  61 {
  62 }
  63
  64 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  65 {
  66 }
  67
  68 void lcd_disable(void)
  69 {
  70 }
  71
  72 void lcd_panel_disable(void)
  73 {
  74 }
  75
  76 void fb_videomode_to_var(struct fb_var_screeninfo *var,
  77                          const struct fb_videomode *mode)
  78 {
  79         var->xres = mode->xres;
  80         var->yres = mode->yres;
  81         var->xres_virtual = mode->xres;
  82         var->yres_virtual = mode->yres;
  83         var->xoffset = 0;
  84         var->yoffset = 0;
  85         var->pixclock = mode->pixclock;
  86         var->left_margin = mode->left_margin;
  87         var->right_margin = mode->right_margin;
  88         var->upper_margin = mode->upper_margin;
  89         var->lower_margin = mode->lower_margin;
  90         var->hsync_len = mode->hsync_len;
  91         var->vsync_len = mode->vsync_len;
  92         var->sync = mode->sync;
  93         var->vmode = mode->vmode & FB_VMODE_MASK;
  94 }
  95
  96 /*
  97  * Structure containing the MXC specific framebuffer information.
  98  */
  99 struct mxcfb_info {
 100         int blank;
 101         ipu_channel_t ipu_ch;
 102         int ipu_di;
 103         u32 ipu_di_pix_fmt;
 104         unsigned char overlay;
 105         unsigned char alpha_chan_en;
 106         dma_addr_t alpha_phy_addr0;
 107         dma_addr_t alpha_phy_addr1;
 108         void *alpha_virt_addr0;
 109         void *alpha_virt_addr1;
 110         uint32_t alpha_mem_len;
 111         uint32_t cur_ipu_buf;
 112         uint32_t cur_ipu_alpha_buf;
 113
 114         u32 pseudo_palette[16];
 115 };
 116
 117 enum {
 118         BOTH_ON,
 119         SRC_ON,
 120         TGT_ON,
 121         BOTH_OFF
 122 };
 123
 124 static unsigned long default_bpp = 16;
 125 static unsigned char g_dp_in_use;
 126 static struct fb_info *mxcfb_info[3];
 127 static int ext_clk_used;
 128
 129 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 130 {
 131         uint32_t pixfmt = 0;
 132
 133         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 134
 135         if (fbi->var.nonstd)
 136                 return fbi->var.nonstd;
 137
 138         switch (fbi->var.bits_per_pixel) {
 139         case 24:
 140                 pixfmt = IPU_PIX_FMT_BGR24;
 141                 break;
 142         case 32:
 143                 pixfmt = IPU_PIX_FMT_BGR32;
 144                 break;
 145         case 16:
 146                 pixfmt = IPU_PIX_FMT_RGB565;
 147                 break;
 148         }
 149         return pixfmt;
 150 }
 151
 152 /*
 153  * Set fixed framebuffer parameters based on variable settings.
 154  *
 155  * @param       info     framebuffer information pointer
 156  */
 157 static int mxcfb_set_fix(struct fb_info *info)
 158 {
 159         struct fb_fix_screeninfo *fix = &info->fix;
 160         struct fb_var_screeninfo *var = &info->var;
 161
 162         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 163
 164         fix->type = FB_TYPE_PACKED_PIXELS;
 165         fix->accel = FB_ACCEL_NONE;
 166         fix->visual = FB_VISUAL_TRUECOLOR;
 167         fix->xpanstep = 1;
 168         fix->ypanstep = 1;
 169
 170         return 0;
 171 }
 172
 173 static int setup_disp_channel1(struct fb_info *fbi)
 174 {
 175         ipu_channel_params_t params;
 176         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 177
 178         memset(&params, 0, sizeof(params));
 179         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 180
 181         debug("%s called\n", __func__);
 182         /*
 183          * Assuming interlaced means yuv output, below setting also
 184          * valid for mem_dc_sync. FG should have the same vmode as BG.
 185          */
 186         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 187                 params.mem_dp_bg_sync.interlaced = 1;
 188                 params.mem_dp_bg_sync.out_pixel_fmt =
 189                         IPU_PIX_FMT_YUV444;
 190         } else {
 191                 if (mxc_fbi->ipu_di_pix_fmt) {
 192                         params.mem_dp_bg_sync.out_pixel_fmt =
 193                                 mxc_fbi->ipu_di_pix_fmt;
 194                 } else {
 195                         params.mem_dp_bg_sync.out_pixel_fmt =
 196                                 IPU_PIX_FMT_RGB666;
 197                 }
 198         }
 199         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 200         if (mxc_fbi->alpha_chan_en)
 201                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 202
 203         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 204
 205         return 0;
 206 }
 207
 208 static int setup_disp_channel2(struct fb_info *fbi)
 209 {
 210         int retval = 0;
 211         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 212
 213         mxc_fbi->cur_ipu_buf = 1;
 214         if (mxc_fbi->alpha_chan_en)
 215                 mxc_fbi->cur_ipu_alpha_buf = 1;
 216
 217         fbi->var.xoffset = fbi->var.yoffset = 0;
 218
 219         debug("%s: %x %d %d %d %lx %lx\n",
 220                 __func__,
 221                 mxc_fbi->ipu_ch,
 222                 fbi->var.xres,
 223                 fbi->var.yres,
 224                 fbi->fix.line_length,
 225                 fbi->fix.smem_start,
 226                 fbi->fix.smem_start +
 227                 (fbi->fix.line_length * fbi->var.yres));
 228
 229         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 230                                          bpp_to_pixfmt(fbi),
 231                                          fbi->var.xres, fbi->var.yres,
 232                                          fbi->fix.line_length,
 233                                          fbi->fix.smem_start +
 234                                          (fbi->fix.line_length * fbi->var.yres),
 235                                          fbi->fix.smem_start,
 236                                          0, 0);
 237         if (retval)
 238                 printf("ipu_init_channel_buffer error %d\n", retval);
 239
 240         return retval;
 241 }
 242
 243 /*
 244  * Set framebuffer parameters and change the operating mode.
 245  *
 246  * @param       info     framebuffer information pointer
 247  */
 248 static int mxcfb_set_par(struct fb_info *fbi)
 249 {
 250         int retval = 0;
 251         u32 mem_len;
 252         ipu_di_signal_cfg_t sig_cfg;
 253         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 254         uint32_t out_pixel_fmt;
 255
 256         ipu_disable_channel(mxc_fbi->ipu_ch);
 257         ipu_uninit_channel(mxc_fbi->ipu_ch);
 258         mxcfb_set_fix(fbi);
 259
 260         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 261         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 262                 if (fbi->fix.smem_start)
 263                         mxcfb_unmap_video_memory(fbi);
 264
 265                 if (mxcfb_map_video_memory(fbi) < 0)
 266                         return -ENOMEM;
 267         }
 268
 269         setup_disp_channel1(fbi);
 270
 271         memset(&sig_cfg, 0, sizeof(sig_cfg));
 272         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 273                 sig_cfg.interlaced = 1;
 274                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 275         } else {
 276                 if (mxc_fbi->ipu_di_pix_fmt)
 277                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 278                 else
 279                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 280         }
 281         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 282                 sig_cfg.odd_field_first = 1;
 283         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 284                 sig_cfg.ext_clk = 1;
 285         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 286                 sig_cfg.Hsync_pol = 1;
 287         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 288                 sig_cfg.Vsync_pol = 1;
 289         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 290                 sig_cfg.clk_pol = 1;
 291         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 292                 sig_cfg.data_pol = 1;
 293         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 294                 sig_cfg.enable_pol = 1;
 295         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 296                 sig_cfg.clkidle_en = 1;
 297
 298         debug("pixclock = %ul Hz\n",
 299                 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
 300
 301         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 302                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 303                                 fbi->var.xres, fbi->var.yres,
 304                                 out_pixel_fmt,
 305                                 fbi->var.left_margin,
 306                                 fbi->var.hsync_len,
 307                                 fbi->var.right_margin,
 308                                 fbi->var.upper_margin,
 309                                 fbi->var.vsync_len,
 310                                 fbi->var.lower_margin,
 311                                 0, sig_cfg) != 0) {
 312                 puts("mxcfb: Error initializing panel.\n");
 313                 return -EINVAL;
 314         }
 315
 316         retval = setup_disp_channel2(fbi);
 317         if (retval)
 318                 return retval;
 319
 320         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 321                 ipu_enable_channel(mxc_fbi->ipu_ch);
 322
 323         return retval;
 324 }
 325
 326 /*
 327  * Check framebuffer variable parameters and adjust to valid values.
 328  *
 329  * @param       var      framebuffer variable parameters
 330  *
 331  * @param       info     framebuffer information pointer
 332  */
 333 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 334 {
 335         u32 vtotal;
 336         u32 htotal;
 337
 338         if (var->xres_virtual < var->xres)
 339                 var->xres_virtual = var->xres;
 340         if (var->yres_virtual < var->yres)
 341                 var->yres_virtual = var->yres;
 342
 343         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 344             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 345                 var->bits_per_pixel = default_bpp;
 346
 347         switch (var->bits_per_pixel) {
 348         case 8:
 349                 var->red.length = 3;
 350                 var->red.offset = 5;
 351                 var->red.msb_right = 0;
 352
 353                 var->green.length = 3;
 354                 var->green.offset = 2;
 355                 var->green.msb_right = 0;
 356
 357                 var->blue.length = 2;
 358                 var->blue.offset = 0;
 359                 var->blue.msb_right = 0;
 360
 361                 var->transp.length = 0;
 362                 var->transp.offset = 0;
 363                 var->transp.msb_right = 0;
 364                 break;
 365         case 16:
 366                 var->red.length = 5;
 367                 var->red.offset = 11;
 368                 var->red.msb_right = 0;
 369
 370                 var->green.length = 6;
 371                 var->green.offset = 5;
 372                 var->green.msb_right = 0;
 373
 374                 var->blue.length = 5;
 375                 var->blue.offset = 0;
 376                 var->blue.msb_right = 0;
 377
 378                 var->transp.length = 0;
 379                 var->transp.offset = 0;
 380                 var->transp.msb_right = 0;
 381                 break;
 382         case 24:
 383                 var->red.length = 8;
 384                 var->red.offset = 16;
 385                 var->red.msb_right = 0;
 386
 387                 var->green.length = 8;
 388                 var->green.offset = 8;
 389                 var->green.msb_right = 0;
 390
 391                 var->blue.length = 8;
 392                 var->blue.offset = 0;
 393                 var->blue.msb_right = 0;
 394
 395                 var->transp.length = 0;
 396                 var->transp.offset = 0;
 397                 var->transp.msb_right = 0;
 398                 break;
 399         case 32:
 400                 var->red.length = 8;
 401                 var->red.offset = 16;
 402                 var->red.msb_right = 0;
 403
 404                 var->green.length = 8;
 405                 var->green.offset = 8;
 406                 var->green.msb_right = 0;
 407
 408                 var->blue.length = 8;
 409                 var->blue.offset = 0;
 410                 var->blue.msb_right = 0;
 411
 412                 var->transp.length = 8;
 413                 var->transp.offset = 24;
 414                 var->transp.msb_right = 0;
 415                 break;
 416         }
 417
 418         if (var->pixclock < 1000) {
 419                 htotal = var->xres + var->right_margin + var->hsync_len +
 420                     var->left_margin;
 421                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 422                     var->upper_margin;
 423                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 424                 var->pixclock = KHZ2PICOS(var->pixclock);
 425                 printf("pixclock set for 60Hz refresh = %u ps\n",
 426                         var->pixclock);
 427         }
 428
 429         var->height = -1;
 430         var->width = -1;
 431         var->grayscale = 0;
 432
 433         return 0;
 434 }
 435
 436 static int mxcfb_map_video_memory(struct fb_info *fbi)
 437 {
 438         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 439                 fbi->fix.smem_len = fbi->var.yres_virtual *
 440                                     fbi->fix.line_length;
 441         }
 442
 443         fbi->screen_base = (char *)lcd_base;
 444         fbi->fix.smem_start = (unsigned long)lcd_base;
 445         if (fbi->screen_base == 0) {
 446                 puts("Unable to allocate framebuffer memory\n");
 447                 fbi->fix.smem_len = 0;
 448                 fbi->fix.smem_start = 0;
 449                 return -EBUSY;
 450         }
 451
 452         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 453                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 454
 455         fbi->screen_size = fbi->fix.smem_len;
 456
 457         /* Clear the screen */
 458         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 459
 460         return 0;
 461 }
 462
 463 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 464 {
 465         fbi->screen_base = 0;
 466         fbi->fix.smem_start = 0;
 467         fbi->fix.smem_len = 0;
 468         return 0;
 469 }
 470
 471 /*
 472  * Initializes the framebuffer information pointer. After allocating
 473  * sufficient memory for the framebuffer structure, the fields are
 474  * filled with custom information passed in from the configurable
 475  * structures.  This includes information such as bits per pixel,
 476  * color maps, screen width/height and RGBA offsets.
 477  *
 478  * @return      Framebuffer structure initialized with our information
 479  */
 480 static struct fb_info *mxcfb_init_fbinfo(void)
 481 {
 482 #define BYTES_PER_LONG 4
 483 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 484         struct fb_info *fbi;
 485         struct mxcfb_info *mxcfbi;
 486         char *p;
 487         int size = sizeof(struct mxcfb_info) + PADDING +
 488                 sizeof(struct fb_info);
 489
 490         debug("%s: %d %d %d %d\n",
 491                 __func__,
 492                 PADDING,
 493                 size,
 494                 sizeof(struct mxcfb_info),
 495                 sizeof(struct fb_info));
 496         /*
 497          * Allocate sufficient memory for the fb structure
 498          */
 499
 500         p = malloc(size);
 501         if (!p)
 502                 return NULL;
 503
 504         memset(p, 0, size);
 505
 506         fbi = (struct fb_info *)p;
 507         fbi->par = p + sizeof(struct fb_info) + PADDING;
 508
 509         mxcfbi = (struct mxcfb_info *)fbi->par;
 510         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 511                 (unsigned int)fbi, (unsigned int)mxcfbi);
 512
 513         fbi->var.activate = FB_ACTIVATE_NOW;
 514
 515         fbi->flags = FBINFO_FLAG_DEFAULT;
 516         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 517
 518         return fbi;
 519 }
 520
 521 /*
 522  * Probe routine for the framebuffer driver. It is called during the
 523  * driver binding process.      The following functions are performed in
 524  * this routine: Framebuffer initialization, Memory allocation and
 525  * mapping, Framebuffer registration, IPU initialization.
 526  *
 527  * @return      Appropriate error code to the kernel common code
 528  */
 529 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode)
 530 {
 531         struct fb_info *fbi;
 532         struct mxcfb_info *mxcfbi;
 533         int ret = 0;
 534
 535         /*
 536          * Initialize FB structures
 537          */
 538         fbi = mxcfb_init_fbinfo();
 539         if (!fbi) {
 540                 ret = -ENOMEM;
 541                 goto err0;
 542         }
 543         mxcfbi = (struct mxcfb_info *)fbi->par;
 544
 545         if (!g_dp_in_use) {
 546                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 547                 mxcfbi->blank = FB_BLANK_UNBLANK;
 548         } else {
 549                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 550                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 551         }
 552
 553         mxcfbi->ipu_di = 0;
 554
 555         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 556         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 557         strcpy(fbi->fix.id, "DISP3 BG");
 558
 559         g_dp_in_use = 1;
 560
 561         mxcfb_info[mxcfbi->ipu_di] = fbi;
 562
 563         /* Need dummy values until real panel is configured */
 564         fbi->var.xres = 640;
 565         fbi->var.yres = 480;
 566         fbi->var.bits_per_pixel = 16;
 567
 568         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 569         fb_videomode_to_var(&fbi->var, mode);
 570
 571         mxcfb_check_var(&fbi->var, fbi);
 572
 573         /* Default Y virtual size is 2x panel size */
 574         fbi->var.yres_virtual = fbi->var.yres * 2;
 575
 576         mxcfb_set_fix(fbi);
 577
 578         /* alocate fb first */
 579         if (mxcfb_map_video_memory(fbi) < 0)
 580                 return -ENOMEM;
 581
 582         mxcfb_set_par(fbi);
 583
 584         /* Setting panel_info for lcd */
 585         panel_info.cmap = NULL;
 586         panel_info.vl_col = fbi->var.xres;
 587         panel_info.vl_row = fbi->var.yres;
 588         panel_info.vl_bpix = LCD_BPP;
 589
 590         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 591
 592         debug("MXC IPUV3 configured\n"
 593                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 594                 panel_info.vl_col,
 595                 panel_info.vl_row,
 596                 panel_info.vl_bpix);
 597
 598         ipu_dump_registers();
 599
 600         return 0;
 601
 602 err0:
 603         return ret;
 604 }
 605
 606 int overwrite_console(void)
 607 {
 608         /* Keep stdout / stderr on serial, our LCD is for splashscreen only */
 609         return 1;
 610 }
 611
 612 void lcd_ctrl_init(void *lcdbase)
 613 {
 614         u32 mem_len = panel_info.vl_col *
 615                 panel_info.vl_row *
 616                 NBITS(panel_info.vl_bpix) / 8;
 617
 618         /*
 619          * We rely on lcdbase being a physical address, i.e., either MMU off,
 620          * or 1-to-1 mapping. Might want to add some virt2phys here.
 621          */
 622         if (!lcdbase)
 623                 return;
 624
 625         memset(lcdbase, 0, mem_len);
 626 }
 627
 628 int mx51_fb_init(struct fb_videomode *mode)
 629 {
 630         int ret;
 631
 632         ret = ipu_probe();
 633         if (ret)
 634                 puts("Error initializing IPU\n");
 635
 636         lcd_base += 56;
 637
 638         debug("Framebuffer at 0x%x\n", (unsigned int)lcd_base);
 639         ret = mxcfb_probe(IPU_PIX_FMT_RGB666, mode);
 640
 641         return ret;
 642 }