drivers/video/fsl_dcu_fb.c

   1 /*
   2  * Copyright 2014 Freescale Semiconductor, Inc.
   3  *
   4  * FSL DCU Framebuffer driver
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <asm/io.h>
  10 #include <common.h>
  11 #include <fdt_support.h>
  12 #include <fsl_dcu_fb.h>
  13 #include <linux/fb.h>
  14 #include <malloc.h>
  15 #include <video_fb.h>
  16 #include "videomodes.h"
  17
  18 /* Convert the X,Y resolution pair into a single number */
  19 #define RESOLUTION(x, y) (((u32)(x) << 16) | (y))
  20
  21 #ifdef CONFIG_SYS_FSL_DCU_LE
  22 #define dcu_read32      in_le32
  23 #define dcu_write32     out_le32
  24 #elif defined(CONFIG_SYS_FSL_DCU_BE)
  25 #define dcu_read32      in_be32
  26 #define dcu_write32     out_be32
  27 #endif
  28
  29 #define DCU_MODE_BLEND_ITER(x)          ((x) << 20)
  30 #define DCU_MODE_RASTER_EN              (1 << 14)
  31 #define DCU_MODE_NORMAL                 1
  32 #define DCU_MODE_COLORBAR               3
  33 #define DCU_BGND_R(x)                   ((x) << 16)
  34 #define DCU_BGND_G(x)                   ((x) << 8)
  35 #define DCU_BGND_B(x)                   (x)
  36 #define DCU_DISP_SIZE_DELTA_Y(x)        ((x) << 16)
  37 #define DCU_DISP_SIZE_DELTA_X(x)        (x)
  38 #define DCU_HSYN_PARA_BP(x)             ((x) << 22)
  39 #define DCU_HSYN_PARA_PW(x)             ((x) << 11)
  40 #define DCU_HSYN_PARA_FP(x)             (x)
  41 #define DCU_VSYN_PARA_BP(x)             ((x) << 22)
  42 #define DCU_VSYN_PARA_PW(x)             ((x) << 11)
  43 #define DCU_VSYN_PARA_FP(x)             (x)
  44 #define DCU_SYN_POL_INV_PXCK_FALL       (0 << 6)
  45 #define DCU_SYN_POL_NEG_REMAIN          (0 << 5)
  46 #define DCU_SYN_POL_INV_VS_LOW          (1 << 1)
  47 #define DCU_SYN_POL_INV_HS_LOW          (1)
  48 #define DCU_THRESHOLD_LS_BF_VS(x)       ((x) << 16)
  49 #define DCU_THRESHOLD_OUT_BUF_HIGH(x)   ((x) << 8)
  50 #define DCU_THRESHOLD_OUT_BUF_LOW(x)    (x)
  51 #define DCU_UPDATE_MODE_MODE            (1 << 31)
  52 #define DCU_UPDATE_MODE_READREG         (1 << 30)
  53
  54 #define DCU_CTRLDESCLN_1_HEIGHT(x)      ((x) << 16)
  55 #define DCU_CTRLDESCLN_1_WIDTH(x)       (x)
  56 #define DCU_CTRLDESCLN_2_POSY(x)        ((x) << 16)
  57 #define DCU_CTRLDESCLN_2_POSX(x)        (x)
  58 #define DCU_CTRLDESCLN_4_EN             (1 << 31)
  59 #define DCU_CTRLDESCLN_4_TILE_EN        (1 << 30)
  60 #define DCU_CTRLDESCLN_4_DATA_SEL_CLUT  (1 << 29)
  61 #define DCU_CTRLDESCLN_4_SAFETY_EN      (1 << 28)
  62 #define DCU_CTRLDESCLN_4_TRANS(x)       ((x) << 20)
  63 #define DCU_CTRLDESCLN_4_BPP(x)         ((x) << 16)
  64 #define DCU_CTRLDESCLN_4_RLE_EN         (1 << 15)
  65 #define DCU_CTRLDESCLN_4_LUOFFS(x)      ((x) << 4)
  66 #define DCU_CTRLDESCLN_4_BB_ON          (1 << 2)
  67 #define DCU_CTRLDESCLN_4_AB(x)          (x)
  68 #define DCU_CTRLDESCLN_5_CKMAX_R(x)     ((x) << 16)
  69 #define DCU_CTRLDESCLN_5_CKMAX_G(x)     ((x) << 8)
  70 #define DCU_CTRLDESCLN_5_CKMAX_B(x)     (x)
  71 #define DCU_CTRLDESCLN_6_CKMIN_R(x)     ((x) << 16)
  72 #define DCU_CTRLDESCLN_6_CKMIN_G(x)     ((x) << 8)
  73 #define DCU_CTRLDESCLN_6_CKMIN_B(x)     (x)
  74 #define DCU_CTRLDESCLN_7_TILE_VER(x)    ((x) << 16)
  75 #define DCU_CTRLDESCLN_7_TILE_HOR(x)    (x)
  76 #define DCU_CTRLDESCLN_8_FG_FCOLOR(x)   (x)
  77 #define DCU_CTRLDESCLN_9_BG_BCOLOR(x)   (x)
  78
  79 #define BPP_16_RGB565                   4
  80 #define BPP_24_RGB888                   5
  81 #define BPP_32_ARGB8888                 6
  82
  83 DECLARE_GLOBAL_DATA_PTR;
  84
  85 /*
  86  * This setting is used for the TWR_LCD_RGB card
  87  */
  88 static struct fb_videomode fsl_dcu_mode_480_272 = {
  89         .name           = "480x272-60",
  90         .refresh        = 60,
  91         .xres           = 480,
  92         .yres           = 272,
  93         .pixclock       = 91996,
  94         .left_margin    = 2,
  95         .right_margin   = 2,
  96         .upper_margin   = 1,
  97         .lower_margin   = 1,
  98         .hsync_len      = 41,
  99         .vsync_len      = 2,
 100         .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 101         .vmode          = FB_VMODE_NONINTERLACED
 102 };
 103
 104 /*
 105  * This setting is used for Siliconimage SiI9022A HDMI
 106  */
 107 static struct fb_videomode fsl_dcu_mode_640_480 = {
 108         .name           = "640x480-60",
 109         .refresh        = 60,
 110         .xres           = 640,
 111         .yres           = 480,
 112         .pixclock       = 39722,
 113         .left_margin    = 48,
 114         .right_margin   = 16,
 115         .upper_margin   = 33,
 116         .lower_margin   = 10,
 117         .hsync_len      = 96,
 118         .vsync_len      = 2,
 119         .sync           = 0,
 120         .vmode          = FB_VMODE_NONINTERLACED,
 121 };
 122
 123 /*
 124  * DCU register map
 125  */
 126 struct dcu_reg {
 127         u32 desc_cursor[4];
 128         u32 mode;
 129         u32 bgnd;
 130         u32 disp_size;
 131         u32 hsyn_para;
 132         u32 vsyn_para;
 133         u32 synpol;
 134         u32 threshold;
 135         u32 int_status;
 136         u32 int_mask;
 137         u32 colbar[8];
 138         u32 div_ratio;
 139         u32 sign_calc[2];
 140         u32 crc_val;
 141         u8 res_064[0x6c-0x64];
 142         u32 parr_err_status1;
 143         u8 res_070[0x7c-0x70];
 144         u32 parr_err_status3;
 145         u32 mparr_err_status1;
 146         u8 res_084[0x90-0x84];
 147         u32 mparr_err_status3;
 148         u32 threshold_inp_buf[2];
 149         u8 res_09c[0xa0-0x9c];
 150         u32 luma_comp;
 151         u32 chroma_red;
 152         u32 chroma_green;
 153         u32 chroma_blue;
 154         u32 crc_pos;
 155         u32 lyr_intpol_en;
 156         u32 lyr_luma_comp;
 157         u32 lyr_chrm_red;
 158         u32 lyr_chrm_grn;
 159         u32 lyr_chrm_blue;
 160         u8 res_0c4[0xcc-0xc8];
 161         u32 update_mode;
 162         u32 underrun;
 163         u8 res_0d4[0x100-0xd4];
 164         u32 gpr;
 165         u32 slr_l[2];
 166         u32 slr_disp_size;
 167         u32 slr_hvsync_para;
 168         u32 slr_pol;
 169         u32 slr_l_transp[2];
 170         u8 res_120[0x200-0x120];
 171         u32 ctrldescl[DCU_LAYER_MAX_NUM][16];
 172 };
 173
 174 static struct fb_info info;
 175
 176 static void reset_total_layers(void)
 177 {
 178         struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
 179         int i;
 180
 181         for (i = 0; i < DCU_LAYER_MAX_NUM; i++) {
 182                 dcu_write32(&regs->ctrldescl[i][0], 0);
 183                 dcu_write32(&regs->ctrldescl[i][1], 0);
 184                 dcu_write32(&regs->ctrldescl[i][2], 0);
 185                 dcu_write32(&regs->ctrldescl[i][3], 0);
 186                 dcu_write32(&regs->ctrldescl[i][4], 0);
 187                 dcu_write32(&regs->ctrldescl[i][5], 0);
 188                 dcu_write32(&regs->ctrldescl[i][6], 0);
 189                 dcu_write32(&regs->ctrldescl[i][7], 0);
 190                 dcu_write32(&regs->ctrldescl[i][8], 0);
 191                 dcu_write32(&regs->ctrldescl[i][9], 0);
 192                 dcu_write32(&regs->ctrldescl[i][10], 0);
 193         }
 194
 195         dcu_write32(&regs->update_mode, DCU_UPDATE_MODE_READREG);
 196 }
 197
 198 static int layer_ctrldesc_init(int index, u32 pixel_format)
 199 {
 200         struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
 201         unsigned int bpp = BPP_24_RGB888;
 202
 203         dcu_write32(&regs->ctrldescl[index][0],
 204                     DCU_CTRLDESCLN_1_HEIGHT(info.var.yres) |
 205                     DCU_CTRLDESCLN_1_WIDTH(info.var.xres));
 206
 207         dcu_write32(&regs->ctrldescl[index][1],
 208                     DCU_CTRLDESCLN_2_POSY(0) |
 209                     DCU_CTRLDESCLN_2_POSX(0));
 210
 211         dcu_write32(&regs->ctrldescl[index][2], (unsigned int)info.screen_base);
 212
 213         switch (pixel_format) {
 214         case 16:
 215                 bpp = BPP_16_RGB565;
 216                 break;
 217         case 24:
 218                 bpp = BPP_24_RGB888;
 219                 break;
 220         case 32:
 221                 bpp = BPP_32_ARGB8888;
 222                 break;
 223         default:
 224                 printf("unsupported color depth: %u\n", pixel_format);
 225         }
 226
 227         dcu_write32(&regs->ctrldescl[index][3],
 228                     DCU_CTRLDESCLN_4_EN |
 229                     DCU_CTRLDESCLN_4_TRANS(0xff) |
 230                     DCU_CTRLDESCLN_4_BPP(bpp) |
 231                     DCU_CTRLDESCLN_4_AB(0));
 232
 233         dcu_write32(&regs->ctrldescl[index][4],
 234                     DCU_CTRLDESCLN_5_CKMAX_R(0xff) |
 235                     DCU_CTRLDESCLN_5_CKMAX_G(0xff) |
 236                     DCU_CTRLDESCLN_5_CKMAX_B(0xff));
 237         dcu_write32(&regs->ctrldescl[index][5],
 238                     DCU_CTRLDESCLN_6_CKMIN_R(0) |
 239                     DCU_CTRLDESCLN_6_CKMIN_G(0) |
 240                     DCU_CTRLDESCLN_6_CKMIN_B(0));
 241
 242         dcu_write32(&regs->ctrldescl[index][6],
 243                     DCU_CTRLDESCLN_7_TILE_VER(0) |
 244                     DCU_CTRLDESCLN_7_TILE_HOR(0));
 245
 246         dcu_write32(&regs->ctrldescl[index][7], DCU_CTRLDESCLN_8_FG_FCOLOR(0));
 247         dcu_write32(&regs->ctrldescl[index][8], DCU_CTRLDESCLN_9_BG_BCOLOR(0));
 248
 249         dcu_write32(&regs->update_mode, DCU_UPDATE_MODE_READREG);
 250
 251         return 0;
 252 }
 253
 254 int fsl_dcu_init(unsigned int xres, unsigned int yres,
 255                  unsigned int pixel_format)
 256 {
 257         struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
 258         unsigned int div, mode;
 259
 260         info.screen_size =
 261                 info.var.xres * info.var.yres * (info.var.bits_per_pixel / 8);
 262
 263         if (info.screen_size > CONFIG_VIDEO_FSL_DCU_MAX_FB_SIZE_MB) {
 264                 info.screen_size = 0;
 265                 return -ENOMEM;
 266         }
 267
 268         /* Reserve framebuffer at the end of memory */
 269         gd->fb_base = gd->bd->bi_dram[0].start +
 270                         gd->bd->bi_dram[0].size - info.screen_size;
 271         info.screen_base = (char *)gd->fb_base;
 272
 273         memset(info.screen_base, 0, info.screen_size);
 274
 275         reset_total_layers();
 276         div = dcu_set_pixel_clock(info.var.pixclock);
 277         dcu_write32(&regs->div_ratio, (div - 1));
 278
 279         dcu_write32(&regs->disp_size,
 280                     DCU_DISP_SIZE_DELTA_Y(info.var.yres) |
 281                     DCU_DISP_SIZE_DELTA_X(info.var.xres / 16));
 282
 283         dcu_write32(&regs->hsyn_para,
 284                     DCU_HSYN_PARA_BP(info.var.left_margin) |
 285                     DCU_HSYN_PARA_PW(info.var.hsync_len) |
 286                     DCU_HSYN_PARA_FP(info.var.right_margin));
 287
 288         dcu_write32(&regs->vsyn_para,
 289                     DCU_VSYN_PARA_BP(info.var.upper_margin) |
 290                     DCU_VSYN_PARA_PW(info.var.vsync_len) |
 291                     DCU_VSYN_PARA_FP(info.var.lower_margin));
 292
 293         dcu_write32(&regs->synpol,
 294                     DCU_SYN_POL_INV_PXCK_FALL |
 295                     DCU_SYN_POL_NEG_REMAIN |
 296                     DCU_SYN_POL_INV_VS_LOW |
 297                     DCU_SYN_POL_INV_HS_LOW);
 298
 299         dcu_write32(&regs->bgnd,
 300                     DCU_BGND_R(0) | DCU_BGND_G(0) | DCU_BGND_B(0));
 301
 302         dcu_write32(&regs->mode,
 303                     DCU_MODE_BLEND_ITER(DCU_LAYER_MAX_NUM) |
 304                     DCU_MODE_RASTER_EN);
 305
 306         dcu_write32(&regs->threshold,
 307                     DCU_THRESHOLD_LS_BF_VS(0x3) |
 308                     DCU_THRESHOLD_OUT_BUF_HIGH(0x78) |
 309                     DCU_THRESHOLD_OUT_BUF_LOW(0));
 310
 311         mode = dcu_read32(&regs->mode);
 312         dcu_write32(&regs->mode, mode | DCU_MODE_NORMAL);
 313
 314         layer_ctrldesc_init(0, pixel_format);
 315
 316         return 0;
 317 }
 318
 319 ulong board_get_usable_ram_top(ulong total_size)
 320 {
 321         return gd->ram_top - CONFIG_VIDEO_FSL_DCU_MAX_FB_SIZE_MB;
 322 }
 323
 324 void *video_hw_init(void)
 325 {
 326         static GraphicDevice ctfb;
 327         const char *options;
 328         unsigned int depth = 0, freq = 0;
 329         struct fb_videomode *fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
 330
 331         if (!video_get_video_mode(&ctfb.winSizeX, &ctfb.winSizeY, &depth, &freq,
 332                                   &options))
 333                 return NULL;
 334
 335         /* Find the monitor port, which is a required option */
 336         if (!options)
 337                 return NULL;
 338         if (strncmp(options, "monitor=", 8) != 0)
 339                 return NULL;
 340
 341         switch (RESOLUTION(ctfb.winSizeX, ctfb.winSizeY)) {
 342         case RESOLUTION(480, 272):
 343                 fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
 344                 break;
 345         case RESOLUTION(640, 480):
 346                 fsl_dcu_mode_db = &fsl_dcu_mode_640_480;
 347                 break;
 348         default:
 349                 printf("unsupported resolution %ux%u\n",
 350                        ctfb.winSizeX, ctfb.winSizeY);
 351         }
 352
 353         info.var.xres = fsl_dcu_mode_db->xres;
 354         info.var.yres = fsl_dcu_mode_db->yres;
 355         info.var.bits_per_pixel = 32;
 356         info.var.pixclock = fsl_dcu_mode_db->pixclock;
 357         info.var.left_margin = fsl_dcu_mode_db->left_margin;
 358         info.var.right_margin = fsl_dcu_mode_db->right_margin;
 359         info.var.upper_margin = fsl_dcu_mode_db->upper_margin;
 360         info.var.lower_margin = fsl_dcu_mode_db->lower_margin;
 361         info.var.hsync_len = fsl_dcu_mode_db->hsync_len;
 362         info.var.vsync_len = fsl_dcu_mode_db->vsync_len;
 363         info.var.sync = fsl_dcu_mode_db->sync;
 364         info.var.vmode = fsl_dcu_mode_db->vmode;
 365         info.fix.line_length = info.var.xres * info.var.bits_per_pixel / 8;
 366
 367         if (platform_dcu_init(ctfb.winSizeX, ctfb.winSizeY,
 368                               options + 8, fsl_dcu_mode_db) < 0)
 369                 return NULL;
 370
 371         ctfb.frameAdrs = (unsigned int)info.screen_base;
 372         ctfb.plnSizeX = ctfb.winSizeX;
 373         ctfb.plnSizeY = ctfb.winSizeY;
 374
 375         ctfb.gdfBytesPP = 4;
 376         ctfb.gdfIndex = GDF_32BIT_X888RGB;
 377
 378         ctfb.memSize = info.screen_size;
 379
 380         return &ctfb;
 381 }
 382
 383 #if defined(CONFIG_OF_BOARD_SETUP)
 384 int fsl_dcu_fixedfb_setup(void *blob)
 385 {
 386         u64 start, size;
 387         int ret;
 388
 389         start = gd->bd->bi_dram[0].start;
 390         size = gd->bd->bi_dram[0].size - info.screen_size;
 391
 392         /*
 393          * Align size on section size (1 MiB).
 394          */
 395         size &= 0xfff00000;
 396         ret = fdt_fixup_memory_banks(blob, &start, &size, 1);
 397         if (ret) {
 398                 eprintf("Cannot setup fb: Error reserving memory\n");
 399                 return ret;
 400         }
 401
 402         return 0;
 403 }
 404 #endif