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