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 // #define DEBUG
  32 #include <common.h>
  33 #include <asm/errno.h>
  34 #include <linux/string.h>
  35 #include <linux/list.h>
  36 #include <linux/fb.h>
  37 #include <asm/io.h>
  38 #include <malloc.h>
  39 #include <lcd.h>
  40 #include <ipu.h>
  41 #include <video_fb.h>
  42 #include "videomodes.h"
  43 #include "mxcfb.h"
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 extern vidinfo_t panel_info;
  48
  49 void *lcd_base;                 /* Start of framebuffer memory  */
  50 void *lcd_console_address;      /* Start of console buffer      */
  51
  52 int lcd_line_length;
  53 int lcd_color_fg;
  54 int lcd_color_bg;
  55
  56 short console_col;
  57 short console_row;
  58
  59 static int mxcfb_map_video_memory(struct fb_info *fbi);
  60 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  61
  62 void lcd_initcolregs(void)
  63 {
  64 }
  65
  66 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  67 {
  68 }
  69
  70 void lcd_disable(void)
  71 {
  72 }
  73
  74 void lcd_panel_disable(void)
  75 {
  76 }
  77
  78 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  79                          const struct fb_videomode *mode)
  80 {
  81         var->xres = mode->xres;
  82         var->yres = mode->yres;
  83         var->xres_virtual = mode->xres;
  84         var->yres_virtual = mode->yres;
  85         var->xoffset = 0;
  86         var->yoffset = 0;
  87         var->pixclock = mode->pixclock;
  88         var->left_margin = mode->left_margin;
  89         var->right_margin = mode->right_margin;
  90         var->upper_margin = mode->upper_margin;
  91         var->lower_margin = mode->lower_margin;
  92         var->hsync_len = mode->hsync_len;
  93         var->vsync_len = mode->vsync_len;
  94         var->sync = mode->sync;
  95         var->vmode = mode->vmode & FB_VMODE_MASK;
  96 }
  97
  98 /*
  99  * Structure containing the MXC specific framebuffer information.
 100  */
 101 struct mxcfb_info {
 102         int blank;
 103         ipu_channel_t ipu_ch;
 104         int ipu_di;
 105         u32 ipu_di_pix_fmt;
 106         unsigned char overlay;
 107         unsigned char alpha_chan_en;
 108         dma_addr_t alpha_phy_addr0;
 109         dma_addr_t alpha_phy_addr1;
 110         void *alpha_virt_addr0;
 111         void *alpha_virt_addr1;
 112         uint32_t alpha_mem_len;
 113         uint32_t cur_ipu_buf;
 114         uint32_t cur_ipu_alpha_buf;
 115
 116         u32 pseudo_palette[16];
 117 };
 118
 119 enum {
 120         BOTH_ON,
 121         SRC_ON,
 122         TGT_ON,
 123         BOTH_OFF
 124 };
 125
 126 static unsigned long default_bpp = 16;
 127 static unsigned char g_dp_in_use;
 128 static struct fb_info *mxcfb_info[3];
 129 static int ext_clk_used;
 130
 131 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
 132 {
 133         uint32_t pixfmt = 0;
 134
 135         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 136
 137         if (fbi->var.nonstd)
 138                 return fbi->var.nonstd;
 139
 140         switch (fbi->var.bits_per_pixel) {
 141         case 24:
 142                 pixfmt = IPU_PIX_FMT_BGR24;
 143                 break;
 144         case 32:
 145                 pixfmt = IPU_PIX_FMT_BGR32;
 146                 break;
 147         case 16:
 148                 pixfmt = IPU_PIX_FMT_RGB565;
 149                 break;
 150         case 8:
 151                 pixfmt = IPU_PIX_FMT_GENERIC;
 152         }
 153         return pixfmt;
 154 }
 155
 156 /*
 157  * Set fixed framebuffer parameters based on variable settings.
 158  *
 159  * @param       info     framebuffer information pointer
 160  */
 161 static int mxcfb_set_fix(struct fb_info *info)
 162 {
 163         struct fb_fix_screeninfo *fix = &info->fix;
 164         struct fb_var_screeninfo *var = &info->var;
 165
 166         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 167
 168         fix->type = FB_TYPE_PACKED_PIXELS;
 169         fix->accel = FB_ACCEL_NONE;
 170         fix->visual = FB_VISUAL_TRUECOLOR;
 171         fix->xpanstep = 1;
 172         fix->ypanstep = 1;
 173
 174         return 0;
 175 }
 176
 177 static int setup_disp_channel1(struct fb_info *fbi)
 178 {
 179         ipu_channel_params_t params;
 180         struct mxcfb_info *mxc_fbi = fbi->par;
 181
 182         memset(&params, 0, sizeof(params));
 183         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 184
 185         debug("%s called\n", __func__);
 186         /*
 187          * Assuming interlaced means yuv output, below setting also
 188          * valid for mem_dc_sync. FG should have the same vmode as BG.
 189          */
 190         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 191                 params.mem_dp_bg_sync.interlaced = 1;
 192                 params.mem_dp_bg_sync.out_pixel_fmt =
 193                         IPU_PIX_FMT_YUV444;
 194         } else {
 195                 if (mxc_fbi->ipu_di_pix_fmt) {
 196                         params.mem_dp_bg_sync.out_pixel_fmt =
 197                                 mxc_fbi->ipu_di_pix_fmt;
 198                 } else {
 199                         params.mem_dp_bg_sync.out_pixel_fmt =
 200                                 IPU_PIX_FMT_RGB666;
 201                 }
 202         }
 203         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 204         if (mxc_fbi->alpha_chan_en)
 205                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 206
 207         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 208
 209         return 0;
 210 }
 211
 212 static int setup_disp_channel2(struct fb_info *fbi)
 213 {
 214         int retval = 0;
 215         struct mxcfb_info *mxc_fbi = fbi->par;
 216
 217         mxc_fbi->cur_ipu_buf = 1;
 218         if (mxc_fbi->alpha_chan_en)
 219                 mxc_fbi->cur_ipu_alpha_buf = 1;
 220
 221         fbi->var.xoffset = fbi->var.yoffset = 0;
 222
 223         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 224                 __func__,
 225                 mxc_fbi->ipu_ch,
 226                 fbi->var.xres,
 227                 fbi->var.yres,
 228                 fbi->fix.line_length,
 229                 fbi->fix.smem_start,
 230                 fbi->fix.smem_start +
 231                 (fbi->fix.line_length * fbi->var.yres) - 1);
 232
 233         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 234                                          bpp_to_pixfmt(fbi),
 235                                          fbi->var.xres, fbi->var.yres,
 236                                          fbi->fix.line_length,
 237                                          fbi->fix.smem_start +
 238                                          (fbi->fix.line_length * fbi->var.yres),
 239                                          fbi->fix.smem_start,
 240                                          0, 0);
 241         if (retval)
 242                 printf("ipu_init_channel_buffer error %d\n", retval);
 243
 244         return retval;
 245 }
 246
 247 /*
 248  * Set framebuffer parameters and change the operating mode.
 249  *
 250  * @param       info     framebuffer information pointer
 251  */
 252 static int mxcfb_set_par(struct fb_info *fbi)
 253 {
 254         int retval = 0;
 255         u32 mem_len;
 256         ipu_di_signal_cfg_t sig_cfg;
 257         struct mxcfb_info *mxc_fbi = fbi->par;
 258         uint32_t out_pixel_fmt;
 259
 260         ipu_disable_channel(mxc_fbi->ipu_ch);
 261         ipu_uninit_channel(mxc_fbi->ipu_ch);
 262         mxcfb_set_fix(fbi);
 263
 264         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 265         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 266                 if (fbi->fix.smem_start)
 267                         mxcfb_unmap_video_memory(fbi);
 268
 269                 if (mxcfb_map_video_memory(fbi) < 0)
 270                         return -ENOMEM;
 271         }
 272
 273         setup_disp_channel1(fbi);
 274
 275         memset(&sig_cfg, 0, sizeof(sig_cfg));
 276         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 277                 sig_cfg.interlaced = 1;
 278                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 279         } else {
 280                 if (mxc_fbi->ipu_di_pix_fmt)
 281                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 282                 else
 283                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 284         }
 285         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 286                 sig_cfg.odd_field_first = 1;
 287         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 288                 sig_cfg.ext_clk = 1;
 289         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 290                 sig_cfg.Hsync_pol = 1;
 291         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 292                 sig_cfg.Vsync_pol = 1;
 293         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 294                 sig_cfg.clk_pol = 1;
 295         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 296                 sig_cfg.data_pol = 1;
 297         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 298                 sig_cfg.enable_pol = 1;
 299         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 300                 sig_cfg.clkidle_en = 1;
 301
 302         debug("pixclock = %lu.%03lu MHz\n",
 303                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 304                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 305
 306         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 307                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 308                                 fbi->var.xres, fbi->var.yres,
 309                                 out_pixel_fmt,
 310                                 fbi->var.left_margin,
 311                                 fbi->var.hsync_len,
 312                                 fbi->var.right_margin,
 313                                 fbi->var.upper_margin,
 314                                 fbi->var.vsync_len,
 315                                 fbi->var.lower_margin,
 316                                 0, sig_cfg);
 317         if (retval != 0) {
 318                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 319                 return retval;
 320         }
 321
 322         retval = setup_disp_channel2(fbi);
 323         if (retval)
 324                 return retval;
 325
 326         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 327                 ipu_enable_channel(mxc_fbi->ipu_ch);
 328
 329         return retval;
 330 }
 331
 332 /*
 333  * Check framebuffer variable parameters and adjust to valid values.
 334  *
 335  * @param       var      framebuffer variable parameters
 336  *
 337  * @param       info     framebuffer information pointer
 338  */
 339 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 340 {
 341         u32 vtotal;
 342         u32 htotal;
 343
 344         if (var->xres_virtual < var->xres)
 345                 var->xres_virtual = var->xres;
 346         if (var->yres_virtual < var->yres)
 347                 var->yres_virtual = var->yres;
 348
 349         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 350             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 351                 var->bits_per_pixel = default_bpp;
 352
 353         switch (var->bits_per_pixel) {
 354         case 8:
 355                 var->red.length = 3;
 356                 var->red.offset = 5;
 357                 var->red.msb_right = 0;
 358
 359                 var->green.length = 3;
 360                 var->green.offset = 2;
 361                 var->green.msb_right = 0;
 362
 363                 var->blue.length = 2;
 364                 var->blue.offset = 0;
 365                 var->blue.msb_right = 0;
 366
 367                 var->transp.length = 0;
 368                 var->transp.offset = 0;
 369                 var->transp.msb_right = 0;
 370                 break;
 371         case 16:
 372                 var->red.length = 5;
 373                 var->red.offset = 11;
 374                 var->red.msb_right = 0;
 375
 376                 var->green.length = 6;
 377                 var->green.offset = 5;
 378                 var->green.msb_right = 0;
 379
 380                 var->blue.length = 5;
 381                 var->blue.offset = 0;
 382                 var->blue.msb_right = 0;
 383
 384                 var->transp.length = 0;
 385                 var->transp.offset = 0;
 386                 var->transp.msb_right = 0;
 387                 break;
 388         case 24:
 389                 var->red.length = 8;
 390                 var->red.offset = 16;
 391                 var->red.msb_right = 0;
 392
 393                 var->green.length = 8;
 394                 var->green.offset = 8;
 395                 var->green.msb_right = 0;
 396
 397                 var->blue.length = 8;
 398                 var->blue.offset = 0;
 399                 var->blue.msb_right = 0;
 400
 401                 var->transp.length = 0;
 402                 var->transp.offset = 0;
 403                 var->transp.msb_right = 0;
 404                 break;
 405         case 32:
 406                 var->red.length = 8;
 407                 var->red.offset = 16;
 408                 var->red.msb_right = 0;
 409
 410                 var->green.length = 8;
 411                 var->green.offset = 8;
 412                 var->green.msb_right = 0;
 413
 414                 var->blue.length = 8;
 415                 var->blue.offset = 0;
 416                 var->blue.msb_right = 0;
 417
 418                 var->transp.length = 8;
 419                 var->transp.offset = 24;
 420                 var->transp.msb_right = 0;
 421                 break;
 422         }
 423
 424         if (var->pixclock < 1000) {
 425                 htotal = var->xres + var->right_margin + var->hsync_len +
 426                     var->left_margin;
 427                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 428                     var->upper_margin;
 429                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 430                 var->pixclock = KHZ2PICOS(var->pixclock);
 431                 printf("pixclock set for 60Hz refresh = %u ps\n",
 432                         var->pixclock);
 433         }
 434
 435         var->height = -1;
 436         var->width = -1;
 437         var->grayscale = 0;
 438
 439         return 0;
 440 }
 441
 442 static int mxcfb_map_video_memory(struct fb_info *fbi)
 443 {
 444         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 445                 fbi->fix.smem_len = fbi->var.yres_virtual *
 446                                     fbi->fix.line_length;
 447         }
 448         if (gd->fb_base)
 449                 fbi->screen_base = (void *)gd->fb_base;
 450         else
 451                 fbi->screen_base = malloc(fbi->fix.smem_len);
 452         if (fbi->screen_base == NULL) {
 453                 puts("Unable to allocate framebuffer memory\n");
 454                 fbi->fix.smem_len = 0;
 455                 return -EBUSY;
 456         }
 457         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 458
 459         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 460                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 461
 462         fbi->screen_size = fbi->fix.smem_len;
 463
 464         return 0;
 465 }
 466
 467 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 468 {
 469         fbi->screen_base = 0;
 470         fbi->fix.smem_start = 0;
 471         fbi->fix.smem_len = 0;
 472         return 0;
 473 }
 474
 475 /*
 476  * Initializes the framebuffer information pointer. After allocating
 477  * sufficient memory for the framebuffer structure, the fields are
 478  * filled with custom information passed in from the configurable
 479  * structures.  This includes information such as bits per pixel,
 480  * color maps, screen width/height and RGBA offsets.
 481  *
 482  * @return      Framebuffer structure initialized with our information
 483  */
 484 static struct fb_info *mxcfb_init_fbinfo(void)
 485 {
 486         struct fb_info *fbi;
 487         struct mxcfb_info *mxcfbi;
 488         void *p;
 489         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 490                 sizeof(struct fb_info);
 491
 492         debug("%s: %d %d %d\n",
 493                 __func__,
 494                 size,
 495                 sizeof(struct mxcfb_info),
 496                 sizeof(struct fb_info));
 497         /*
 498          * Allocate sufficient memory for the fb structure
 499          */
 500
 501         p = malloc(size);
 502         if (!p)
 503                 return NULL;
 504
 505         memset(p, 0, size);
 506
 507         fbi = p;
 508         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 509
 510         mxcfbi = fbi->par;
 511         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 512                 fbi, mxcfbi);
 513
 514         fbi->var.activate = FB_ACTIVATE_NOW;
 515
 516         fbi->flags = FBINFO_FLAG_DEFAULT;
 517         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 518
 519         return fbi;
 520 }
 521
 522 /*
 523  * Probe routine for the framebuffer driver. It is called during the
 524  * driver binding process.      The following functions are performed in
 525  * this routine: Framebuffer initialization, Memory allocation and
 526  * mapping, Framebuffer registration, IPU initialization.
 527  *
 528  * @return      Appropriate error code to the kernel common code
 529  */
 530 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
 531 {
 532         struct fb_info *fbi;
 533         struct mxcfb_info *mxcfbi;
 534
 535         /*
 536          * Initialize FB structures
 537          */
 538         fbi = mxcfb_init_fbinfo();
 539         if (!fbi)
 540                 return -ENOMEM;
 541
 542         mxcfbi = fbi->par;
 543
 544         if (!g_dp_in_use) {
 545                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 546                 mxcfbi->blank = FB_BLANK_UNBLANK;
 547         } else {
 548                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 549                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 550         }
 551
 552         mxcfbi->ipu_di = di;
 553
 554         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 555         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 556         strcpy(fbi->fix.id, "DISP3 BG");
 557
 558         g_dp_in_use = 1;
 559
 560         mxcfb_info[mxcfbi->ipu_di] = fbi;
 561
 562         /* Need dummy values until real panel is configured */
 563         fbi->var.xres = panel_info.vl_col;
 564         fbi->var.yres = panel_info.vl_row;
 565
 566         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 567         fb_videomode_to_var(&fbi->var, mode);
 568         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 569         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 570         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 571
 572         mxcfb_check_var(&fbi->var, fbi);
 573         mxcfb_set_fix(fbi);
 574
 575         /* allocate fb first */
 576         if (mxcfb_map_video_memory(fbi) < 0)
 577                 return -ENOMEM;
 578
 579         mxcfb_set_par(fbi);
 580
 581         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 582
 583         debug("MXC IPUV3 configured\n"
 584                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 585                 panel_info.vl_col,
 586                 panel_info.vl_row,
 587                 panel_info.vl_bpix);
 588
 589         ipu_dump_registers();
 590
 591         return 0;
 592 }
 593
 594 ulong calc_fbsize(void)
 595 {
 596         return (panel_info.vl_col * panel_info.vl_row *
 597                 NBITS(panel_info.vl_bpix)) / 8;
 598 }
 599
 600 int overwrite_console(void)
 601 {
 602         /* Keep stdout / stderr on serial, our LCD is for splashscreen only */
 603         return 1;
 604 }
 605
 606 #if 0
 607 void lcd_ctrl_init(void *lcdbase)
 608 {
 609         u32 mem_len = panel_info.vl_col *
 610                 panel_info.vl_row *
 611                 NBITS(panel_info.vl_bpix) / 8;
 612
 613         /*
 614          * We rely on lcdbase being a physical address, i.e., either MMU off,
 615          * or 1-to-1 mapping. Might want to add some virt2phys here.
 616          */
 617         if (!lcdbase)
 618                 return;
 619
 620         memset(lcdbase, 0, mem_len);
 621 }
 622 #endif
 623
 624 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 625                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 626 {
 627         int ret;
 628
 629 //      default_bpp = bpp;
 630
 631         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 632         if (ret) {
 633                 printf("Error initializing IPU\n");
 634                 return ret;
 635         }
 636
 637         debug("Framebuffer at %p\n", lcd_base);
 638         ret = mxcfb_probe(interface_pix_fmt, mode, di);
 639
 640         return ret;
 641 }