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/arch/crm_regs.h>
  17 #include <asm/global_data.h>
  18 #include <linux/string.h>
  19 #include <linux/list.h>
  20 #include <linux/fb.h>
  21 #include <asm/io.h>
  22 #include <malloc.h>
  23 #include <video_fb.h>
  24 #include "videomodes.h"
  25 #include "ipu.h"
  26 #include "mxcfb.h"
  27 #include "ipu_regs.h"
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 static int mxcfb_map_video_memory(struct fb_info *fbi);
  32 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  33
  34 /* graphics setup */
  35 static GraphicDevice panel;
  36 static struct fb_videomode const *gmode;
  37 static uint8_t gdisp;
  38 static uint32_t gpixfmt;
  39
  40 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  41                          const struct fb_videomode *mode)
  42 {
  43         var->xres = mode->xres;
  44         var->yres = mode->yres;
  45         var->xres_virtual = mode->xres;
  46         var->yres_virtual = mode->yres;
  47         var->xoffset = 0;
  48         var->yoffset = 0;
  49         var->pixclock = mode->pixclock;
  50         var->left_margin = mode->left_margin;
  51         var->right_margin = mode->right_margin;
  52         var->upper_margin = mode->upper_margin;
  53         var->lower_margin = mode->lower_margin;
  54         var->hsync_len = mode->hsync_len;
  55         var->vsync_len = mode->vsync_len;
  56         var->sync = mode->sync;
  57         var->vmode = mode->vmode & FB_VMODE_MASK;
  58 }
  59
  60 /*
  61  * Structure containing the MXC specific framebuffer information.
  62  */
  63 struct mxcfb_info {
  64         int blank;
  65         ipu_channel_t ipu_ch;
  66         int ipu_di;
  67         u32 ipu_di_pix_fmt;
  68         unsigned char overlay;
  69         unsigned char alpha_chan_en;
  70         dma_addr_t alpha_phy_addr0;
  71         dma_addr_t alpha_phy_addr1;
  72         void *alpha_virt_addr0;
  73         void *alpha_virt_addr1;
  74         uint32_t alpha_mem_len;
  75         uint32_t cur_ipu_buf;
  76         uint32_t cur_ipu_alpha_buf;
  77
  78         u32 pseudo_palette[16];
  79 };
  80
  81 enum {
  82         BOTH_ON,
  83         SRC_ON,
  84         TGT_ON,
  85         BOTH_OFF
  86 };
  87
  88 static unsigned long default_bpp = 16;
  89 static unsigned char g_dp_in_use;
  90 static struct fb_info *mxcfb_info[3];
  91 static int ext_clk_used;
  92
  93 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  94 {
  95         uint32_t pixfmt = 0;
  96
  97         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
  98
  99         if (fbi->var.nonstd)
 100                 return fbi->var.nonstd;
 101
 102         switch (fbi->var.bits_per_pixel) {
 103         case 24:
 104                 pixfmt = IPU_PIX_FMT_BGR24;
 105                 break;
 106         case 32:
 107                 pixfmt = IPU_PIX_FMT_BGR32;
 108                 break;
 109         case 16:
 110                 pixfmt = IPU_PIX_FMT_RGB565;
 111                 break;
 112         }
 113         return pixfmt;
 114 }
 115
 116 /*
 117  * Set fixed framebuffer parameters based on variable settings.
 118  *
 119  * @param       info     framebuffer information pointer
 120  */
 121 static int mxcfb_set_fix(struct fb_info *info)
 122 {
 123         struct fb_fix_screeninfo *fix = &info->fix;
 124         struct fb_var_screeninfo *var = &info->var;
 125
 126         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 127
 128         fix->type = FB_TYPE_PACKED_PIXELS;
 129         fix->accel = FB_ACCEL_NONE;
 130         fix->visual = FB_VISUAL_TRUECOLOR;
 131         fix->xpanstep = 1;
 132         fix->ypanstep = 1;
 133
 134         return 0;
 135 }
 136
 137 static int setup_disp_channel1(struct fb_info *fbi)
 138 {
 139         ipu_channel_params_t params;
 140         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 141
 142         memset(&params, 0, sizeof(params));
 143         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 144
 145         debug("%s called\n", __func__);
 146         /*
 147          * Assuming interlaced means yuv output, below setting also
 148          * valid for mem_dc_sync. FG should have the same vmode as BG.
 149          */
 150         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 151                 params.mem_dp_bg_sync.interlaced = 1;
 152                 params.mem_dp_bg_sync.out_pixel_fmt =
 153                         IPU_PIX_FMT_YUV444;
 154         } else {
 155                 if (mxc_fbi->ipu_di_pix_fmt) {
 156                         params.mem_dp_bg_sync.out_pixel_fmt =
 157                                 mxc_fbi->ipu_di_pix_fmt;
 158                 } else {
 159                         params.mem_dp_bg_sync.out_pixel_fmt =
 160                                 IPU_PIX_FMT_RGB666;
 161                 }
 162         }
 163         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 164         if (mxc_fbi->alpha_chan_en)
 165                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 166
 167         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 168
 169         return 0;
 170 }
 171
 172 static int setup_disp_channel2(struct fb_info *fbi)
 173 {
 174         int retval = 0;
 175         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 176
 177         mxc_fbi->cur_ipu_buf = 1;
 178         if (mxc_fbi->alpha_chan_en)
 179                 mxc_fbi->cur_ipu_alpha_buf = 1;
 180
 181         fbi->var.xoffset = fbi->var.yoffset = 0;
 182
 183         debug("%s: %x %d %d %d %lx %lx\n",
 184                 __func__,
 185                 mxc_fbi->ipu_ch,
 186                 fbi->var.xres,
 187                 fbi->var.yres,
 188                 fbi->fix.line_length,
 189                 fbi->fix.smem_start,
 190                 fbi->fix.smem_start +
 191                 (fbi->fix.line_length * fbi->var.yres));
 192
 193         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 194                                          bpp_to_pixfmt(fbi),
 195                                          fbi->var.xres, fbi->var.yres,
 196                                          fbi->fix.line_length,
 197                                          fbi->fix.smem_start +
 198                                          (fbi->fix.line_length * fbi->var.yres),
 199                                          fbi->fix.smem_start,
 200                                          0, 0);
 201         if (retval)
 202                 printf("ipu_init_channel_buffer error %d\n", retval);
 203
 204         return retval;
 205 }
 206
 207 /*
 208  * Set framebuffer parameters and change the operating mode.
 209  *
 210  * @param       info     framebuffer information pointer
 211  */
 212 static int mxcfb_set_par(struct fb_info *fbi)
 213 {
 214         int retval = 0;
 215         u32 mem_len;
 216         ipu_di_signal_cfg_t sig_cfg;
 217         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
 218         uint32_t out_pixel_fmt;
 219
 220         ipu_disable_channel(mxc_fbi->ipu_ch);
 221         ipu_uninit_channel(mxc_fbi->ipu_ch);
 222         mxcfb_set_fix(fbi);
 223
 224         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 225         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 226                 if (fbi->fix.smem_start)
 227                         mxcfb_unmap_video_memory(fbi);
 228
 229                 if (mxcfb_map_video_memory(fbi) < 0)
 230                         return -ENOMEM;
 231         }
 232
 233         setup_disp_channel1(fbi);
 234
 235         memset(&sig_cfg, 0, sizeof(sig_cfg));
 236         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 237                 sig_cfg.interlaced = 1;
 238                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 239         } else {
 240                 if (mxc_fbi->ipu_di_pix_fmt)
 241                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 242                 else
 243                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 244         }
 245         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 246                 sig_cfg.odd_field_first = 1;
 247         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 248                 sig_cfg.ext_clk = 1;
 249         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 250                 sig_cfg.Hsync_pol = 1;
 251         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 252                 sig_cfg.Vsync_pol = 1;
 253         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 254                 sig_cfg.clk_pol = 1;
 255         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 256                 sig_cfg.data_pol = 1;
 257         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 258                 sig_cfg.enable_pol = 1;
 259         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 260                 sig_cfg.clkidle_en = 1;
 261
 262         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
 263
 264         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
 265                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 266                                 fbi->var.xres, fbi->var.yres,
 267                                 out_pixel_fmt,
 268                                 fbi->var.left_margin,
 269                                 fbi->var.hsync_len,
 270                                 fbi->var.right_margin,
 271                                 fbi->var.upper_margin,
 272                                 fbi->var.vsync_len,
 273                                 fbi->var.lower_margin,
 274                                 0, sig_cfg) != 0) {
 275                 puts("mxcfb: Error initializing panel.\n");
 276                 return -EINVAL;
 277         }
 278
 279         retval = setup_disp_channel2(fbi);
 280         if (retval)
 281                 return retval;
 282
 283         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 284                 ipu_enable_channel(mxc_fbi->ipu_ch);
 285
 286         return retval;
 287 }
 288
 289 /*
 290  * Check framebuffer variable parameters and adjust to valid values.
 291  *
 292  * @param       var      framebuffer variable parameters
 293  *
 294  * @param       info     framebuffer information pointer
 295  */
 296 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 297 {
 298         u32 vtotal;
 299         u32 htotal;
 300
 301         if (var->xres_virtual < var->xres)
 302                 var->xres_virtual = var->xres;
 303         if (var->yres_virtual < var->yres)
 304                 var->yres_virtual = var->yres;
 305
 306         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 307             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 308                 var->bits_per_pixel = default_bpp;
 309
 310         switch (var->bits_per_pixel) {
 311         case 8:
 312                 var->red.length = 3;
 313                 var->red.offset = 5;
 314                 var->red.msb_right = 0;
 315
 316                 var->green.length = 3;
 317                 var->green.offset = 2;
 318                 var->green.msb_right = 0;
 319
 320                 var->blue.length = 2;
 321                 var->blue.offset = 0;
 322                 var->blue.msb_right = 0;
 323
 324                 var->transp.length = 0;
 325                 var->transp.offset = 0;
 326                 var->transp.msb_right = 0;
 327                 break;
 328         case 16:
 329                 var->red.length = 5;
 330                 var->red.offset = 11;
 331                 var->red.msb_right = 0;
 332
 333                 var->green.length = 6;
 334                 var->green.offset = 5;
 335                 var->green.msb_right = 0;
 336
 337                 var->blue.length = 5;
 338                 var->blue.offset = 0;
 339                 var->blue.msb_right = 0;
 340
 341                 var->transp.length = 0;
 342                 var->transp.offset = 0;
 343                 var->transp.msb_right = 0;
 344                 break;
 345         case 24:
 346                 var->red.length = 8;
 347                 var->red.offset = 16;
 348                 var->red.msb_right = 0;
 349
 350                 var->green.length = 8;
 351                 var->green.offset = 8;
 352                 var->green.msb_right = 0;
 353
 354                 var->blue.length = 8;
 355                 var->blue.offset = 0;
 356                 var->blue.msb_right = 0;
 357
 358                 var->transp.length = 0;
 359                 var->transp.offset = 0;
 360                 var->transp.msb_right = 0;
 361                 break;
 362         case 32:
 363                 var->red.length = 8;
 364                 var->red.offset = 16;
 365                 var->red.msb_right = 0;
 366
 367                 var->green.length = 8;
 368                 var->green.offset = 8;
 369                 var->green.msb_right = 0;
 370
 371                 var->blue.length = 8;
 372                 var->blue.offset = 0;
 373                 var->blue.msb_right = 0;
 374
 375                 var->transp.length = 8;
 376                 var->transp.offset = 24;
 377                 var->transp.msb_right = 0;
 378                 break;
 379         }
 380
 381         if (var->pixclock < 1000) {
 382                 htotal = var->xres + var->right_margin + var->hsync_len +
 383                     var->left_margin;
 384                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 385                     var->upper_margin;
 386                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 387                 var->pixclock = KHZ2PICOS(var->pixclock);
 388                 printf("pixclock set for 60Hz refresh = %u ps\n",
 389                         var->pixclock);
 390         }
 391
 392         var->height = -1;
 393         var->width = -1;
 394         var->grayscale = 0;
 395
 396         return 0;
 397 }
 398
 399 static int mxcfb_map_video_memory(struct fb_info *fbi)
 400 {
 401         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 402                 fbi->fix.smem_len = fbi->var.yres_virtual *
 403                                     fbi->fix.line_length;
 404         }
 405         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 406         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 407                                             fbi->fix.smem_len);
 408         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 409         if (fbi->screen_base == 0) {
 410                 puts("Unable to allocate framebuffer memory\n");
 411                 fbi->fix.smem_len = 0;
 412                 fbi->fix.smem_start = 0;
 413                 return -EBUSY;
 414         }
 415
 416         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 417                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 418
 419         fbi->screen_size = fbi->fix.smem_len;
 420
 421         gd->fb_base = fbi->fix.smem_start;
 422
 423         /* Clear the screen */
 424         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
 425
 426         return 0;
 427 }
 428
 429 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 430 {
 431         fbi->screen_base = 0;
 432         fbi->fix.smem_start = 0;
 433         fbi->fix.smem_len = 0;
 434         return 0;
 435 }
 436
 437 /*
 438  * Initializes the framebuffer information pointer. After allocating
 439  * sufficient memory for the framebuffer structure, the fields are
 440  * filled with custom information passed in from the configurable
 441  * structures.  This includes information such as bits per pixel,
 442  * color maps, screen width/height and RGBA offsets.
 443  *
 444  * @return      Framebuffer structure initialized with our information
 445  */
 446 static struct fb_info *mxcfb_init_fbinfo(void)
 447 {
 448 #define BYTES_PER_LONG 4
 449 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
 450         struct fb_info *fbi;
 451         struct mxcfb_info *mxcfbi;
 452         char *p;
 453         int size = sizeof(struct mxcfb_info) + PADDING +
 454                 sizeof(struct fb_info);
 455
 456         debug("%s: %d %d %d %d\n",
 457                 __func__,
 458                 PADDING,
 459                 size,
 460                 sizeof(struct mxcfb_info),
 461                 sizeof(struct fb_info));
 462         /*
 463          * Allocate sufficient memory for the fb structure
 464          */
 465
 466         p = malloc(size);
 467         if (!p)
 468                 return NULL;
 469
 470         memset(p, 0, size);
 471
 472         fbi = (struct fb_info *)p;
 473         fbi->par = p + sizeof(struct fb_info) + PADDING;
 474
 475         mxcfbi = (struct mxcfb_info *)fbi->par;
 476         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
 477                 (unsigned int)fbi, (unsigned int)mxcfbi);
 478
 479         fbi->var.activate = FB_ACTIVATE_NOW;
 480
 481         fbi->flags = FBINFO_FLAG_DEFAULT;
 482         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 483
 484         return fbi;
 485 }
 486
 487 /*
 488  * Probe routine for the framebuffer driver. It is called during the
 489  * driver binding process. The following functions are performed in
 490  * this routine: Framebuffer initialization, Memory allocation and
 491  * mapping, Framebuffer registration, IPU initialization.
 492  *
 493  * @return      Appropriate error code to the kernel common code
 494  */
 495 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
 496                         struct fb_videomode const *mode)
 497 {
 498         struct fb_info *fbi;
 499         struct mxcfb_info *mxcfbi;
 500         int ret = 0;
 501
 502         /*
 503          * Initialize FB structures
 504          */
 505         fbi = mxcfb_init_fbinfo();
 506         if (!fbi) {
 507                 ret = -ENOMEM;
 508                 goto err0;
 509         }
 510         mxcfbi = (struct mxcfb_info *)fbi->par;
 511
 512         if (!g_dp_in_use) {
 513                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 514                 mxcfbi->blank = FB_BLANK_UNBLANK;
 515         } else {
 516                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 517                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 518         }
 519
 520         mxcfbi->ipu_di = disp;
 521
 522         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 523         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 524         strcpy(fbi->fix.id, "DISP3 BG");
 525
 526         g_dp_in_use = 1;
 527
 528         mxcfb_info[mxcfbi->ipu_di] = fbi;
 529
 530         /* Need dummy values until real panel is configured */
 531
 532         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 533         fb_videomode_to_var(&fbi->var, mode);
 534         fbi->var.bits_per_pixel = 16;
 535         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 536         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 537
 538         mxcfb_check_var(&fbi->var, fbi);
 539
 540         /* Default Y virtual size is 2x panel size */
 541         fbi->var.yres_virtual = fbi->var.yres * 2;
 542
 543         mxcfb_set_fix(fbi);
 544
 545         /* allocate fb first */
 546         if (mxcfb_map_video_memory(fbi) < 0)
 547                 return -ENOMEM;
 548
 549         mxcfb_set_par(fbi);
 550
 551         panel.winSizeX = mode->xres;
 552         panel.winSizeY = mode->yres;
 553         panel.plnSizeX = mode->xres;
 554         panel.plnSizeY = mode->yres;
 555
 556         panel.frameAdrs = (u32)fbi->screen_base;
 557         panel.memSize = fbi->screen_size;
 558
 559         panel.gdfBytesPP = 2;
 560         panel.gdfIndex = GDF_16BIT_565RGB;
 561
 562         ipu_dump_registers();
 563
 564         return 0;
 565
 566 err0:
 567         return ret;
 568 }
 569
 570 void ipuv3_fb_shutdown(void)
 571 {
 572         struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 573         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 574         u32 reg;
 575         int i;
 576
 577         /*
 578          * Check if IPU clock was enabled before. Won't access
 579          * IPU registers if clock is not enabled.
 580          */
 581         reg = readl(&mxc_ccm->CCGR3);
 582         if ((reg & MXC_CCM_CCGR3_IPU1_IPU_MASK) == 0)
 583                 return;
 584
 585         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 586                 struct fb_info *fbi = mxcfb_info[i];
 587                 if (fbi) {
 588                         struct mxcfb_info *mxc_fbi = fbi->par;
 589                         ipu_disable_channel(mxc_fbi->ipu_ch);
 590                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 591                 }
 592         }
 593         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 594                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 595                              &stat->int_stat[i]);
 596         }
 597 }
 598
 599 void *video_hw_init(void)
 600 {
 601         int ret;
 602
 603         ret = ipu_probe();
 604         if (ret)
 605                 puts("Error initializing IPU\n");
 606
 607         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
 608         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
 609
 610         return (void *)&panel;
 611 }
 612
 613 int ipuv3_fb_init(struct fb_videomode const *mode,
 614                   uint8_t disp,
 615                   uint32_t pixfmt)
 616 {
 617         gmode = mode;
 618         gdisp = disp;
 619         gpixfmt = pixfmt;
 620
 621         return 0;
 622 }