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  * IPUv3 Linux framebuffer:
   8  *
   9  * (C) Copyright 2004-2011 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 <ipu.h>
  40 #include <video_fb.h>
  41 #include "videomodes.h"
  42 #include "mxcfb.h"
  43
  44 DECLARE_GLOBAL_DATA_PTR;
  45
  46 extern vidinfo_t panel_info;
  47
  48 void *lcd_base;                 /* Start of framebuffer memory  */
  49 void *lcd_console_address;      /* Start of console buffer      */
  50
  51 int lcd_line_length;
  52 int lcd_color_fg;
  53 int lcd_color_bg;
  54
  55 short console_col;
  56 short console_row;
  57
  58 static int mxcfb_map_video_memory(struct fb_info *fbi);
  59 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  60
  61 void lcd_initcolregs(void)
  62 {
  63 }
  64
  65 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  66 {
  67 }
  68
  69 void lcd_disable(void)
  70 {
  71 }
  72
  73 void lcd_panel_disable(void)
  74 {
  75 }
  76
  77 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  78                          const struct fb_videomode *mode)
  79 {
  80         var->xres = mode->xres;
  81         var->yres = mode->yres;
  82         var->xres_virtual = mode->xres;
  83         var->yres_virtual = mode->yres;
  84         var->xoffset = 0;
  85         var->yoffset = 0;
  86         var->pixclock = mode->pixclock;
  87         var->left_margin = mode->left_margin;
  88         var->right_margin = mode->right_margin;
  89         var->upper_margin = mode->upper_margin;
  90         var->lower_margin = mode->lower_margin;
  91         var->hsync_len = mode->hsync_len;
  92         var->vsync_len = mode->vsync_len;
  93         var->sync = mode->sync;
  94         var->vmode = mode->vmode & FB_VMODE_MASK;
  95 }
  96
  97 /*
  98  * Structure containing the MXC specific framebuffer information.
  99  */
 100 struct mxcfb_info {
 101         int blank;
 102         ipu_channel_t ipu_ch;
 103         int ipu_di;
 104         u32 ipu_di_pix_fmt;
 105         unsigned char overlay;
 106         unsigned char alpha_chan_en;
 107         dma_addr_t alpha_phy_addr0;
 108         dma_addr_t alpha_phy_addr1;
 109         void *alpha_virt_addr0;
 110         void *alpha_virt_addr1;
 111         uint32_t alpha_mem_len;
 112         uint32_t cur_ipu_buf;
 113         uint32_t cur_ipu_alpha_buf;
 114
 115         u32 pseudo_palette[16];
 116 };
 117
 118 enum {
 119         BOTH_ON,
 120         SRC_ON,
 121         TGT_ON,
 122         BOTH_OFF
 123 };
 124
 125 static unsigned long default_bpp = 16;
 126 static unsigned char g_dp_in_use;
 127 static struct fb_info *mxcfb_info[3];
 128 static int ext_clk_used;
 129
 130 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 131 {
 132         uint32_t pixfmt = 0;
 133
 134         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 135
 136         if (fbi->var.nonstd)
 137                 return fbi->var.nonstd;
 138
 139         switch (fbi->var.bits_per_pixel) {
 140         case 24:
 141                 pixfmt = IPU_PIX_FMT_BGR24;
 142                 break;
 143         case 32:
 144                 pixfmt = IPU_PIX_FMT_BGR32;
 145                 break;
 146         case 16:
 147                 pixfmt = IPU_PIX_FMT_RGB565;
 148                 break;
 149         case 8:
 150                 pixfmt = IPU_PIX_FMT_GENERIC;
 151         }
 152         return pixfmt;
 153 }
 154
 155 /*
 156  * Set fixed framebuffer parameters based on variable settings.
 157  *
 158  * @param       info     framebuffer information pointer
 159  */
 160 static int mxcfb_set_fix(struct fb_info *info)
 161 {
 162         struct fb_fix_screeninfo *fix = &info->fix;
 163         struct fb_var_screeninfo *var = &info->var;
 164
 165         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 166
 167         fix->type = FB_TYPE_PACKED_PIXELS;
 168         fix->accel = FB_ACCEL_NONE;
 169         fix->visual = FB_VISUAL_TRUECOLOR;
 170         fix->xpanstep = 1;
 171         fix->ypanstep = 1;
 172
 173         return 0;
 174 }
 175
 176 static int setup_disp_channel1(struct fb_info *fbi)
 177 {
 178         ipu_channel_params_t params;
 179         struct mxcfb_info *mxc_fbi = fbi->par;
 180
 181         memset(&params, 0, sizeof(params));
 182         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 183
 184         debug("%s called\n", __func__);
 185         /*
 186          * Assuming interlaced means yuv output, below setting also
 187          * valid for mem_dc_sync. FG should have the same vmode as BG.
 188          */
 189         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 190                 params.mem_dp_bg_sync.interlaced = 1;
 191                 params.mem_dp_bg_sync.out_pixel_fmt =
 192                         IPU_PIX_FMT_YUV444;
 193         } else {
 194                 if (mxc_fbi->ipu_di_pix_fmt) {
 195                         params.mem_dp_bg_sync.out_pixel_fmt =
 196                                 mxc_fbi->ipu_di_pix_fmt;
 197                 } else {
 198                         params.mem_dp_bg_sync.out_pixel_fmt =
 199                                 IPU_PIX_FMT_RGB666;
 200                 }
 201         }
 202         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 203         if (mxc_fbi->alpha_chan_en)
 204                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 205
 206         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 207
 208         return 0;
 209 }
 210
 211 static int setup_disp_channel2(struct fb_info *fbi)
 212 {
 213         int retval = 0;
 214         struct mxcfb_info *mxc_fbi = fbi->par;
 215
 216         mxc_fbi->cur_ipu_buf = 1;
 217         if (mxc_fbi->alpha_chan_en)
 218                 mxc_fbi->cur_ipu_alpha_buf = 1;
 219
 220         fbi->var.xoffset = fbi->var.yoffset = 0;
 221
 222         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 223                 __func__,
 224                 mxc_fbi->ipu_ch,
 225                 fbi->var.xres,
 226                 fbi->var.yres,
 227                 fbi->fix.line_length,
 228                 fbi->fix.smem_start,
 229                 fbi->fix.smem_start +
 230                 (fbi->fix.line_length * fbi->var.yres) - 1);
 231
 232         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 233                                          bpp_to_pixfmt(fbi),
 234                                          fbi->var.xres, fbi->var.yres,
 235                                          fbi->fix.line_length,
 236                                          fbi->fix.smem_start +
 237                                          (fbi->fix.line_length * fbi->var.yres),
 238                                          fbi->fix.smem_start,
 239                                          0, 0);
 240         if (retval)
 241                 printf("ipu_init_channel_buffer error %d\n", retval);
 242
 243         return retval;
 244 }
 245
 246 /*
 247  * Set framebuffer parameters and change the operating mode.
 248  *
 249  * @param       info     framebuffer information pointer
 250  */
 251 static int mxcfb_set_par(struct fb_info *fbi)
 252 {
 253         int retval = 0;
 254         u32 mem_len;
 255         ipu_di_signal_cfg_t sig_cfg;
 256         struct mxcfb_info *mxc_fbi = fbi->par;
 257         uint32_t out_pixel_fmt;
 258
 259         ipu_disable_channel(mxc_fbi->ipu_ch);
 260         ipu_uninit_channel(mxc_fbi->ipu_ch);
 261         mxcfb_set_fix(fbi);
 262
 263         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 264         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 265                 if (fbi->fix.smem_start)
 266                         mxcfb_unmap_video_memory(fbi);
 267
 268                 if (mxcfb_map_video_memory(fbi) < 0)
 269                         return -ENOMEM;
 270         }
 271
 272         setup_disp_channel1(fbi);
 273
 274         memset(&sig_cfg, 0, sizeof(sig_cfg));
 275         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 276                 sig_cfg.interlaced = 1;
 277                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 278         } else {
 279                 if (mxc_fbi->ipu_di_pix_fmt)
 280                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 281                 else
 282                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 283         }
 284         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 285                 sig_cfg.odd_field_first = 1;
 286         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 287                 sig_cfg.ext_clk = 1;
 288         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 289                 sig_cfg.Hsync_pol = 1;
 290         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 291                 sig_cfg.Vsync_pol = 1;
 292         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 293                 sig_cfg.clk_pol = 1;
 294         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 295                 sig_cfg.data_pol = 1;
 296         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 297                 sig_cfg.enable_pol = 1;
 298         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 299                 sig_cfg.clkidle_en = 1;
 300
 301         debug("pixclock = %lu.%03lu MHz\n",
 302                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 303                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 304
 305         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 306                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 307                                 fbi->var.xres, fbi->var.yres,
 308                                 out_pixel_fmt,
 309                                 fbi->var.left_margin,
 310                                 fbi->var.hsync_len,
 311                                 fbi->var.right_margin,
 312                                 fbi->var.upper_margin,
 313                                 fbi->var.vsync_len,
 314                                 fbi->var.lower_margin,
 315                                 0, sig_cfg);
 316         if (retval != 0) {
 317                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 318                 return retval;
 319         }
 320
 321         retval = setup_disp_channel2(fbi);
 322         if (retval)
 323                 return retval;
 324
 325         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 326                 ipu_enable_channel(mxc_fbi->ipu_ch);
 327
 328         return retval;
 329 }
 330
 331 /*
 332  * Check framebuffer variable parameters and adjust to valid values.
 333  *
 334  * @param       var      framebuffer variable parameters
 335  *
 336  * @param       info     framebuffer information pointer
 337  */
 338 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 339 {
 340         u32 vtotal;
 341         u32 htotal;
 342
 343         if (var->xres_virtual < var->xres)
 344                 var->xres_virtual = var->xres;
 345         if (var->yres_virtual < var->yres)
 346                 var->yres_virtual = var->yres;
 347
 348         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 349             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 350                 var->bits_per_pixel = default_bpp;
 351
 352         switch (var->bits_per_pixel) {
 353         case 8:
 354                 var->red.length = 3;
 355                 var->red.offset = 5;
 356                 var->red.msb_right = 0;
 357
 358                 var->green.length = 3;
 359                 var->green.offset = 2;
 360                 var->green.msb_right = 0;
 361
 362                 var->blue.length = 2;
 363                 var->blue.offset = 0;
 364                 var->blue.msb_right = 0;
 365
 366                 var->transp.length = 0;
 367                 var->transp.offset = 0;
 368                 var->transp.msb_right = 0;
 369                 break;
 370         case 16:
 371                 var->red.length = 5;
 372                 var->red.offset = 11;
 373                 var->red.msb_right = 0;
 374
 375                 var->green.length = 6;
 376                 var->green.offset = 5;
 377                 var->green.msb_right = 0;
 378
 379                 var->blue.length = 5;
 380                 var->blue.offset = 0;
 381                 var->blue.msb_right = 0;
 382
 383                 var->transp.length = 0;
 384                 var->transp.offset = 0;
 385                 var->transp.msb_right = 0;
 386                 break;
 387         case 24:
 388                 var->red.length = 8;
 389                 var->red.offset = 16;
 390                 var->red.msb_right = 0;
 391
 392                 var->green.length = 8;
 393                 var->green.offset = 8;
 394                 var->green.msb_right = 0;
 395
 396                 var->blue.length = 8;
 397                 var->blue.offset = 0;
 398                 var->blue.msb_right = 0;
 399
 400                 var->transp.length = 0;
 401                 var->transp.offset = 0;
 402                 var->transp.msb_right = 0;
 403                 break;
 404         case 32:
 405                 var->red.length = 8;
 406                 var->red.offset = 16;
 407                 var->red.msb_right = 0;
 408
 409                 var->green.length = 8;
 410                 var->green.offset = 8;
 411                 var->green.msb_right = 0;
 412
 413                 var->blue.length = 8;
 414                 var->blue.offset = 0;
 415                 var->blue.msb_right = 0;
 416
 417                 var->transp.length = 8;
 418                 var->transp.offset = 24;
 419                 var->transp.msb_right = 0;
 420                 break;
 421         }
 422
 423         if (var->pixclock < 1000) {
 424                 htotal = var->xres + var->right_margin + var->hsync_len +
 425                     var->left_margin;
 426                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 427                     var->upper_margin;
 428                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 429                 var->pixclock = KHZ2PICOS(var->pixclock);
 430                 printf("pixclock set for 60Hz refresh = %u ps\n",
 431                         var->pixclock);
 432         }
 433
 434         var->height = -1;
 435         var->width = -1;
 436         var->grayscale = 0;
 437
 438         return 0;
 439 }
 440
 441 static int mxcfb_map_video_memory(struct fb_info *fbi)
 442 {
 443         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 444                 fbi->fix.smem_len = fbi->var.yres_virtual *
 445                                     fbi->fix.line_length;
 446         }
 447         if (gd->fb_base)
 448                 fbi->screen_base = (void *)gd->fb_base;
 449         else
 450                 fbi->screen_base = malloc(fbi->fix.smem_len);
 451         if (fbi->screen_base == NULL) {
 452                 puts("Unable to allocate framebuffer memory\n");
 453                 fbi->fix.smem_len = 0;
 454                 return -EBUSY;
 455         }
 456         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 457
 458         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 459                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 460
 461         fbi->screen_size = fbi->fix.smem_len;
 462
 463         return 0;
 464 }
 465
 466 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 467 {
 468         fbi->screen_base = 0;
 469         fbi->fix.smem_start = 0;
 470         fbi->fix.smem_len = 0;
 471         return 0;
 472 }
 473
 474 /*
 475  * Initializes the framebuffer information pointer. After allocating
 476  * sufficient memory for the framebuffer structure, the fields are
 477  * filled with custom information passed in from the configurable
 478  * structures.  This includes information such as bits per pixel,
 479  * color maps, screen width/height and RGBA offsets.
 480  *
 481  * @return      Framebuffer structure initialized with our information
 482  */
 483 static struct fb_info *mxcfb_init_fbinfo(void)
 484 {
 485         struct fb_info *fbi;
 486         struct mxcfb_info *mxcfbi;
 487         void *p;
 488         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 489                 sizeof(struct fb_info);
 490
 491         debug("%s: %d %d %d\n",
 492                 __func__,
 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 = p;
 507         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 508
 509         mxcfbi = fbi->par;
 510         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 511                 fbi, 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, int di)
 530 {
 531         struct fb_info *fbi;
 532         struct mxcfb_info *mxcfbi;
 533
 534         /*
 535          * Initialize FB structures
 536          */
 537         fbi = mxcfb_init_fbinfo();
 538         if (!fbi)
 539                 return -ENOMEM;
 540
 541         mxcfbi = fbi->par;
 542
 543         if (!g_dp_in_use) {
 544                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 545                 mxcfbi->blank = FB_BLANK_UNBLANK;
 546         } else {
 547                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 548                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 549         }
 550
 551         mxcfbi->ipu_di = di;
 552
 553         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 554         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 555         strcpy(fbi->fix.id, "DISP3 BG");
 556
 557         g_dp_in_use = 1;
 558
 559         mxcfb_info[mxcfbi->ipu_di] = fbi;
 560
 561         /* Need dummy values until real panel is configured */
 562         fbi->var.xres = panel_info.vl_col;
 563         fbi->var.yres = panel_info.vl_row;
 564
 565         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 566         fb_videomode_to_var(&fbi->var, mode);
 567         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 568         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 569         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 570
 571         mxcfb_check_var(&fbi->var, fbi);
 572         mxcfb_set_fix(fbi);
 573
 574         /* allocate fb first */
 575         if (mxcfb_map_video_memory(fbi) < 0)
 576                 return -ENOMEM;
 577
 578         mxcfb_set_par(fbi);
 579
 580         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 581
 582         debug("MXC IPUV3 configured\n"
 583                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 584                 panel_info.vl_col,
 585                 panel_info.vl_row,
 586                 panel_info.vl_bpix);
 587
 588         ipu_dump_registers();
 589
 590         return 0;
 591 }
 592
 593 ulong calc_fbsize(void)
 594 {
 595         return (panel_info.vl_col * panel_info.vl_row *
 596                 NBITS(panel_info.vl_bpix)) / 8;
 597 }
 598
 599 int overwrite_console(void)
 600 {
 601         /* Keep stdout / stderr on serial, our LCD is for splashscreen only */
 602         return 1;
 603 }
 604
 605 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 606                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 607 {
 608         int ret;
 609
 610 //      default_bpp = bpp;
 611
 612         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 613         if (ret) {
 614                 printf("Error initializing IPU\n");
 615                 return ret;
 616         }
 617
 618         debug("Framebuffer at %p\n", lcd_base);
 619         ret = mxcfb_probe(interface_pix_fmt, mode, di);
 620
 621         return ret;
 622 }