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  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <linux/errno.h>
  16 #include <asm/global_data.h>
  17 #include <linux/string.h>
  18 #include <linux/list.h>
  19 #include <linux/fb.h>
  20 #include <asm/io.h>
  21 #include <malloc.h>
  22 #include <video_fb.h>
  23 #include "videomodes.h"
  24 #include "ipu.h"
  25 #include "mxcfb.h"
  26 #include "ipu_regs.h"
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int mxcfb_map_video_memory(struct fb_info *fbi);
  31 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  32
  33 /* graphics setup */
  34 static GraphicDevice panel;
  35 static struct fb_videomode const *gmode;
  36 static uint8_t gdisp;
  37 static uint32_t gpixfmt;
  38
  39 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  40                          const struct fb_videomode *mode)
  41 {
  42         var->xres = mode->xres;
  43         var->yres = mode->yres;
  44         var->xres_virtual = mode->xres;
  45         var->yres_virtual = mode->yres;
  46         var->xoffset = 0;
  47         var->yoffset = 0;
  48         var->pixclock = mode->pixclock;
  49         var->left_margin = mode->left_margin;
  50         var->right_margin = mode->right_margin;
  51         var->upper_margin = mode->upper_margin;
  52         var->lower_margin = mode->lower_margin;
  53         var->hsync_len = mode->hsync_len;
  54         var->vsync_len = mode->vsync_len;
  55         var->sync = mode->sync;
  56         var->vmode = mode->vmode & FB_VMODE_MASK;
  57 }
  58
  59 /*
  60  * Structure containing the MXC specific framebuffer information.
  61  */
  62 struct mxcfb_info {
  63         int blank;
  64         ipu_channel_t ipu_ch;
  65         int ipu_di;
  66         u32 ipu_di_pix_fmt;
  67         unsigned char overlay;
  68         unsigned char alpha_chan_en;
  69         dma_addr_t alpha_phy_addr0;
  70         dma_addr_t alpha_phy_addr1;
  71         void *alpha_virt_addr0;
  72         void *alpha_virt_addr1;
  73         uint32_t alpha_mem_len;
  74         uint32_t cur_ipu_buf;
  75         uint32_t cur_ipu_alpha_buf;
  76
  77         u32 pseudo_palette[16];
  78 };
  79
  80 enum {
  81         BOTH_ON,
  82         SRC_ON,
  83         TGT_ON,
  84         BOTH_OFF
  85 };
  86
  87 static unsigned long default_bpp = 16;
  88 static unsigned char g_dp_in_use;
  89 static struct fb_info *mxcfb_info[3];
  90 static int ext_clk_used;
  91
  92 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  93 {
  94         uint32_t pixfmt = 0;
  95
  96         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
  97
  98         if (fbi->var.nonstd)
  99                 return fbi->var.nonstd;
 100
 101         switch (fbi->var.bits_per_pixel) {
 102         case 24:
 103                 pixfmt = IPU_PIX_FMT_BGR24;
 104                 break;
 105         case 32:
 106                 pixfmt = IPU_PIX_FMT_BGR32;
 107                 break;
 108         case 16:
 109                 pixfmt = IPU_PIX_FMT_RGB565;
 110                 break;
 111         }
 112         return pixfmt;
 113 }
 114
 115 /*
 116  * Set fixed framebuffer parameters based on variable settings.
 117  *
 118  * @param       info     framebuffer information pointer
 119  */
 120 static int mxcfb_set_fix(struct fb_info *info)
 121 {
 122         struct fb_fix_screeninfo *fix = &info->fix;
 123         struct fb_var_screeninfo *var = &info->var;
 124
 125         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 126
 127         fix->type = FB_TYPE_PACKED_PIXELS;
 128         fix->accel = FB_ACCEL_NONE;
 129         fix->visual = FB_VISUAL_TRUECOLOR;
 130         fix->xpanstep = 1;
 131         fix->ypanstep = 1;
 132
 133         return 0;
 134 }
 135
 136 static int setup_disp_channel1(struct fb_info *fbi)
 137 {
 138         ipu_channel_params_t params;
 139         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 140
 141         memset(&params, 0, sizeof(params));
 142         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 143
 144         debug("%s called\n", __func__);
 145         /*
 146          * Assuming interlaced means yuv output, below setting also
 147          * valid for mem_dc_sync. FG should have the same vmode as BG.
 148          */
 149         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 150                 params.mem_dp_bg_sync.interlaced = 1;
 151                 params.mem_dp_bg_sync.out_pixel_fmt =
 152                         IPU_PIX_FMT_YUV444;
 153         } else {
 154                 if (mxc_fbi->ipu_di_pix_fmt) {
 155                         params.mem_dp_bg_sync.out_pixel_fmt =
 156                                 mxc_fbi->ipu_di_pix_fmt;
 157                 } else {
 158                         params.mem_dp_bg_sync.out_pixel_fmt =
 159                                 IPU_PIX_FMT_RGB666;
 160                 }
 161         }
 162         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 163         if (mxc_fbi->alpha_chan_en)
 164                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 165
 166         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 167
 168         return 0;
 169 }
 170
 171 static int setup_disp_channel2(struct fb_info *fbi)
 172 {
 173         int retval = 0;
 174         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 175
 176         mxc_fbi->cur_ipu_buf = 1;
 177         if (mxc_fbi->alpha_chan_en)
 178                 mxc_fbi->cur_ipu_alpha_buf = 1;
 179
 180         fbi->var.xoffset = fbi->var.yoffset = 0;
 181
 182         debug("%s: %x %d %d %d %lx %lx\n",
 183                 __func__,
 184                 mxc_fbi->ipu_ch,
 185                 fbi->var.xres,
 186                 fbi->var.yres,
 187                 fbi->fix.line_length,
 188                 fbi->fix.smem_start,
 189                 fbi->fix.smem_start +
 190                 (fbi->fix.line_length * fbi->var.yres));
 191
 192         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 193                                          bpp_to_pixfmt(fbi),
 194                                          fbi->var.xres, fbi->var.yres,
 195                                          fbi->fix.line_length,
 196                                          fbi->fix.smem_start +
 197                                          (fbi->fix.line_length * fbi->var.yres),
 198                                          fbi->fix.smem_start,
 199                                          0, 0);
 200         if (retval)
 201                 printf("ipu_init_channel_buffer error %d\n", retval);
 202
 203         return retval;
 204 }
 205
 206 /*
 207  * Set framebuffer parameters and change the operating mode.
 208  *
 209  * @param       info     framebuffer information pointer
 210  */
 211 static int mxcfb_set_par(struct fb_info *fbi)
 212 {
 213         int retval = 0;
 214         u32 mem_len;
 215         ipu_di_signal_cfg_t sig_cfg;
 216         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 217         uint32_t out_pixel_fmt;
 218
 219         ipu_disable_channel(mxc_fbi->ipu_ch);
 220         ipu_uninit_channel(mxc_fbi->ipu_ch);
 221         mxcfb_set_fix(fbi);
 222
 223         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 224         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 225                 if (fbi->fix.smem_start)
 226                         mxcfb_unmap_video_memory(fbi);
 227
 228                 if (mxcfb_map_video_memory(fbi) < 0)
 229                         return -ENOMEM;
 230         }
 231
 232         setup_disp_channel1(fbi);
 233
 234         memset(&sig_cfg, 0, sizeof(sig_cfg));
 235         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 236                 sig_cfg.interlaced = 1;
 237                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 238         } else {
 239                 if (mxc_fbi->ipu_di_pix_fmt)
 240                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 241                 else
 242                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 243         }
 244         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 245                 sig_cfg.odd_field_first = 1;
 246         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 247                 sig_cfg.ext_clk = 1;
 248         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 249                 sig_cfg.Hsync_pol = 1;
 250         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 251                 sig_cfg.Vsync_pol = 1;
 252         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 253                 sig_cfg.clk_pol = 1;
 254         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 255                 sig_cfg.data_pol = 1;
 256         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 257                 sig_cfg.enable_pol = 1;
 258         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 259                 sig_cfg.clkidle_en = 1;
 260
 261         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
 262
 263         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 264                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 265                                 fbi->var.xres, fbi->var.yres,
 266                                 out_pixel_fmt,
 267                                 fbi->var.left_margin,
 268                                 fbi->var.hsync_len,
 269                                 fbi->var.right_margin,
 270                                 fbi->var.upper_margin,
 271                                 fbi->var.vsync_len,
 272                                 fbi->var.lower_margin,
 273                                 0, sig_cfg) != 0) {
 274                 puts("mxcfb: Error initializing panel.\n");
 275                 return -EINVAL;
 276         }
 277
 278         retval = setup_disp_channel2(fbi);
 279         if (retval)
 280                 return retval;
 281
 282         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 283                 ipu_enable_channel(mxc_fbi->ipu_ch);
 284
 285         return retval;
 286 }
 287
 288 /*
 289  * Check framebuffer variable parameters and adjust to valid values.
 290  *
 291  * @param       var      framebuffer variable parameters
 292  *
 293  * @param       info     framebuffer information pointer
 294  */
 295 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 296 {
 297         u32 vtotal;
 298         u32 htotal;
 299
 300         if (var->xres_virtual < var->xres)
 301                 var->xres_virtual = var->xres;
 302         if (var->yres_virtual < var->yres)
 303                 var->yres_virtual = var->yres;
 304
 305         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 306             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 307                 var->bits_per_pixel = default_bpp;
 308
 309         switch (var->bits_per_pixel) {
 310         case 8:
 311                 var->red.length = 3;
 312                 var->red.offset = 5;
 313                 var->red.msb_right = 0;
 314
 315                 var->green.length = 3;
 316                 var->green.offset = 2;
 317                 var->green.msb_right = 0;
 318
 319                 var->blue.length = 2;
 320                 var->blue.offset = 0;
 321                 var->blue.msb_right = 0;
 322
 323                 var->transp.length = 0;
 324                 var->transp.offset = 0;
 325                 var->transp.msb_right = 0;
 326                 break;
 327         case 16:
 328                 var->red.length = 5;
 329                 var->red.offset = 11;
 330                 var->red.msb_right = 0;
 331
 332                 var->green.length = 6;
 333                 var->green.offset = 5;
 334                 var->green.msb_right = 0;
 335
 336                 var->blue.length = 5;
 337                 var->blue.offset = 0;
 338                 var->blue.msb_right = 0;
 339
 340                 var->transp.length = 0;
 341                 var->transp.offset = 0;
 342                 var->transp.msb_right = 0;
 343                 break;
 344         case 24:
 345                 var->red.length = 8;
 346                 var->red.offset = 16;
 347                 var->red.msb_right = 0;
 348
 349                 var->green.length = 8;
 350                 var->green.offset = 8;
 351                 var->green.msb_right = 0;
 352
 353                 var->blue.length = 8;
 354                 var->blue.offset = 0;
 355                 var->blue.msb_right = 0;
 356
 357                 var->transp.length = 0;
 358                 var->transp.offset = 0;
 359                 var->transp.msb_right = 0;
 360                 break;
 361         case 32:
 362                 var->red.length = 8;
 363                 var->red.offset = 16;
 364                 var->red.msb_right = 0;
 365
 366                 var->green.length = 8;
 367                 var->green.offset = 8;
 368                 var->green.msb_right = 0;
 369
 370                 var->blue.length = 8;
 371                 var->blue.offset = 0;
 372                 var->blue.msb_right = 0;
 373
 374                 var->transp.length = 8;
 375                 var->transp.offset = 24;
 376                 var->transp.msb_right = 0;
 377                 break;
 378         }
 379
 380         if (var->pixclock < 1000) {
 381                 htotal = var->xres + var->right_margin + var->hsync_len +
 382                     var->left_margin;
 383                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 384                     var->upper_margin;
 385                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 386                 var->pixclock = KHZ2PICOS(var->pixclock);
 387                 printf("pixclock set for 60Hz refresh = %u ps\n",
 388                         var->pixclock);
 389         }
 390
 391         var->height = -1;
 392         var->width = -1;
 393         var->grayscale = 0;
 394
 395         return 0;
 396 }
 397
 398 static int mxcfb_map_video_memory(struct fb_info *fbi)
 399 {
 400         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 401                 fbi->fix.smem_len = fbi->var.yres_virtual *
 402                                     fbi->fix.line_length;
 403         }
 404         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 405         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 406                                             fbi->fix.smem_len);
 407         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 408         if (fbi->screen_base == 0) {
 409                 puts("Unable to allocate framebuffer memory\n");
 410                 fbi->fix.smem_len = 0;
 411                 fbi->fix.smem_start = 0;
 412                 return -EBUSY;
 413         }
 414
 415         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 416                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 417
 418         fbi->screen_size = fbi->fix.smem_len;
 419
 420         gd->fb_base = fbi->fix.smem_start;
 421
 422         /* Clear the screen */
 423         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 424
 425         return 0;
 426 }
 427
 428 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 429 {
 430         fbi->screen_base = 0;
 431         fbi->fix.smem_start = 0;
 432         fbi->fix.smem_len = 0;
 433         return 0;
 434 }
 435
 436 /*
 437  * Initializes the framebuffer information pointer. After allocating
 438  * sufficient memory for the framebuffer structure, the fields are
 439  * filled with custom information passed in from the configurable
 440  * structures.  This includes information such as bits per pixel,
 441  * color maps, screen width/height and RGBA offsets.
 442  *
 443  * @return      Framebuffer structure initialized with our information
 444  */
 445 static struct fb_info *mxcfb_init_fbinfo(void)
 446 {
 447 #define BYTES_PER_LONG 4
 448 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 449         struct fb_info *fbi;
 450         struct mxcfb_info *mxcfbi;
 451         char *p;
 452         int size = sizeof(struct mxcfb_info) + PADDING +
 453                 sizeof(struct fb_info);
 454
 455         debug("%s: %d %d %d %d\n",
 456                 __func__,
 457                 PADDING,
 458                 size,
 459                 sizeof(struct mxcfb_info),
 460                 sizeof(struct fb_info));
 461         /*
 462          * Allocate sufficient memory for the fb structure
 463          */
 464
 465         p = malloc(size);
 466         if (!p)
 467                 return NULL;
 468
 469         memset(p, 0, size);
 470
 471         fbi = (struct fb_info *)p;
 472         fbi->par = p + sizeof(struct fb_info) + PADDING;
 473
 474         mxcfbi = (struct mxcfb_info *)fbi->par;
 475         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 476                 (unsigned int)fbi, (unsigned int)mxcfbi);
 477
 478         fbi->var.activate = FB_ACTIVATE_NOW;
 479
 480         fbi->flags = FBINFO_FLAG_DEFAULT;
 481         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 482
 483         return fbi;
 484 }
 485
 486 /*
 487  * Probe routine for the framebuffer driver. It is called during the
 488  * driver binding process. The following functions are performed in
 489  * this routine: Framebuffer initialization, Memory allocation and
 490  * mapping, Framebuffer registration, IPU initialization.
 491  *
 492  * @return      Appropriate error code to the kernel common code
 493  */
 494 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 495                         struct fb_videomode const *mode)
 496 {
 497         struct fb_info *fbi;
 498         struct mxcfb_info *mxcfbi;
 499         int ret = 0;
 500
 501         /*
 502          * Initialize FB structures
 503          */
 504         fbi = mxcfb_init_fbinfo();
 505         if (!fbi) {
 506                 ret = -ENOMEM;
 507                 goto err0;
 508         }
 509         mxcfbi = (struct mxcfb_info *)fbi->par;
 510
 511         if (!g_dp_in_use) {
 512                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 513                 mxcfbi->blank = FB_BLANK_UNBLANK;
 514         } else {
 515                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 516                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 517         }
 518
 519         mxcfbi->ipu_di = disp;
 520
 521         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 522         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 523         strcpy(fbi->fix.id, "DISP3 BG");
 524
 525         g_dp_in_use = 1;
 526
 527         mxcfb_info[mxcfbi->ipu_di] = fbi;
 528
 529         /* Need dummy values until real panel is configured */
 530
 531         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 532         fb_videomode_to_var(&fbi->var, mode);
 533         fbi->var.bits_per_pixel = 16;
 534         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 535         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 536
 537         mxcfb_check_var(&fbi->var, fbi);
 538
 539         /* Default Y virtual size is 2x panel size */
 540         fbi->var.yres_virtual = fbi->var.yres * 2;
 541
 542         mxcfb_set_fix(fbi);
 543
 544         /* allocate fb first */
 545         if (mxcfb_map_video_memory(fbi) < 0)
 546                 return -ENOMEM;
 547
 548         mxcfb_set_par(fbi);
 549
 550         panel.winSizeX = mode->xres;
 551         panel.winSizeY = mode->yres;
 552         panel.plnSizeX = mode->xres;
 553         panel.plnSizeY = mode->yres;
 554
 555         panel.frameAdrs = (u32)fbi->screen_base;
 556         panel.memSize = fbi->screen_size;
 557
 558         panel.gdfBytesPP = 2;
 559         panel.gdfIndex = GDF_16BIT_565RGB;
 560
 561         ipu_dump_registers();
 562
 563         return 0;
 564
 565 err0:
 566         return ret;
 567 }
 568
 569 void ipuv3_fb_shutdown(void)
 570 {
 571         int i;
 572         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 573
 574         if (!ipu_clk_enabled())
 575                 return;
 576
 577         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 578                 struct fb_info *fbi = mxcfb_info[i];
 579                 if (fbi) {
 580                         struct mxcfb_info *mxc_fbi = fbi->par;
 581                         ipu_disable_channel(mxc_fbi->ipu_ch);
 582                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 583                 }
 584         }
 585         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 586                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 587                              &stat->int_stat[i]);
 588         }
 589 }
 590
 591 void *video_hw_init(void)
 592 {
 593         int ret;
 594
 595         ret = ipu_probe();
 596         if (ret)
 597                 puts("Error initializing IPU\n");
 598
 599         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 600         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 601
 602         return (void *)&panel;
 603 }
 604
 605 int ipuv3_fb_init(struct fb_videomode const *mode,
 606                   uint8_t disp,
 607                   uint32_t pixfmt)
 608 {
 609         gmode = mode;
 610         gdisp = disp;
 611         gpixfmt = pixfmt;
 612
 613         return 0;
 614 }