drivers/video/da8xx-fb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Porting to u-boot:
   4  *
   5  * (C) Copyright 2011
   6  * Stefano Babic, DENX Software Engineering, sbabic@denx.de.
   7  *
   8  * Copyright (C) 2008-2009 MontaVista Software Inc.
   9  * Copyright (C) 2008-2009 Texas Instruments Inc
  10  *
  11  * Based on the LCD driver for TI Avalanche processors written by
  12  * Ajay Singh and Shalom Hai.
  13  */
  14
  15 #include <common.h>
  16 #include <memalign.h>
  17 #include <video_fb.h>
  18 #include <linux/list.h>
  19 #include <linux/fb.h>
  20
  21 #include <linux/errno.h>
  22 #include <asm/io.h>
  23 #include <asm/arch/hardware.h>
  24
  25 #include "videomodes.h"
  26 #include "da8xx-fb.h"
  27
  28 #if !defined(DA8XX_LCD_CNTL_BASE)
  29 #define DA8XX_LCD_CNTL_BASE     DAVINCI_LCD_CNTL_BASE
  30 #endif
  31
  32 #define DRIVER_NAME "da8xx_lcdc"
  33
  34 #define LCD_VERSION_1   1
  35 #define LCD_VERSION_2   2
  36
  37 /* LCD Status Register */
  38 #define LCD_END_OF_FRAME1               (1 << 9)
  39 #define LCD_END_OF_FRAME0               (1 << 8)
  40 #define LCD_PL_LOAD_DONE                (1 << 6)
  41 #define LCD_FIFO_UNDERFLOW              (1 << 5)
  42 #define LCD_SYNC_LOST                   (1 << 2)
  43
  44 /* LCD DMA Control Register */
  45 #define LCD_DMA_BURST_SIZE(x)           ((x) << 4)
  46 #define LCD_DMA_BURST_1                 0x0
  47 #define LCD_DMA_BURST_2                 0x1
  48 #define LCD_DMA_BURST_4                 0x2
  49 #define LCD_DMA_BURST_8                 0x3
  50 #define LCD_DMA_BURST_16                0x4
  51 #define LCD_V1_END_OF_FRAME_INT_ENA     (1 << 2)
  52 #define LCD_V2_END_OF_FRAME0_INT_ENA    (1 << 8)
  53 #define LCD_V2_END_OF_FRAME1_INT_ENA    (1 << 9)
  54 #define LCD_DUAL_FRAME_BUFFER_ENABLE    (1 << 0)
  55
  56 #define LCD_V2_TFT_24BPP_MODE           (1 << 25)
  57 #define LCD_V2_TFT_24BPP_UNPACK         (1 << 26)
  58
  59 /* LCD Control Register */
  60 #define LCD_CLK_DIVISOR(x)              ((x) << 8)
  61 #define LCD_RASTER_MODE                 0x01
  62
  63 /* LCD Raster Control Register */
  64 #define LCD_PALETTE_LOAD_MODE(x)        ((x) << 20)
  65 #define PALETTE_AND_DATA                0x00
  66 #define PALETTE_ONLY                    0x01
  67 #define DATA_ONLY                       0x02
  68
  69 #define LCD_MONO_8BIT_MODE              (1 << 9)
  70 #define LCD_RASTER_ORDER                (1 << 8)
  71 #define LCD_TFT_MODE                    (1 << 7)
  72 #define LCD_V1_UNDERFLOW_INT_ENA        (1 << 6)
  73 #define LCD_V2_UNDERFLOW_INT_ENA        (1 << 5)
  74 #define LCD_V1_PL_INT_ENA               (1 << 4)
  75 #define LCD_V2_PL_INT_ENA               (1 << 6)
  76 #define LCD_MONOCHROME_MODE             (1 << 1)
  77 #define LCD_RASTER_ENABLE               (1 << 0)
  78 #define LCD_TFT_ALT_ENABLE              (1 << 23)
  79 #define LCD_STN_565_ENABLE              (1 << 24)
  80 #define LCD_V2_DMA_CLK_EN               (1 << 2)
  81 #define LCD_V2_LIDD_CLK_EN              (1 << 1)
  82 #define LCD_V2_CORE_CLK_EN              (1 << 0)
  83 #define LCD_V2_LPP_B10                  26
  84 #define LCD_V2_TFT_24BPP_MODE           (1 << 25)
  85 #define LCD_V2_TFT_24BPP_UNPACK         (1 << 26)
  86
  87 /* LCD Raster Timing 2 Register */
  88 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x)      ((x) << 16)
  89 #define LCD_AC_BIAS_FREQUENCY(x)                ((x) << 8)
  90 #define LCD_SYNC_CTRL                           (1 << 25)
  91 #define LCD_SYNC_EDGE                           (1 << 24)
  92 #define LCD_INVERT_PIXEL_CLOCK                  (1 << 22)
  93 #define LCD_INVERT_LINE_CLOCK                   (1 << 21)
  94 #define LCD_INVERT_FRAME_CLOCK                  (1 << 20)
  95
  96 /* Clock registers available only on Version 2 */
  97 #define  LCD_CLK_MAIN_RESET                     (1 << 3)
  98 /* LCD Block */
  99 struct da8xx_lcd_regs {
 100         u32     revid;
 101         u32     ctrl;
 102         u32     stat;
 103         u32     lidd_ctrl;
 104         u32     lidd_cs0_conf;
 105         u32     lidd_cs0_addr;
 106         u32     lidd_cs0_data;
 107         u32     lidd_cs1_conf;
 108         u32     lidd_cs1_addr;
 109         u32     lidd_cs1_data;
 110         u32     raster_ctrl;
 111         u32     raster_timing_0;
 112         u32     raster_timing_1;
 113         u32     raster_timing_2;
 114         u32     raster_subpanel;
 115         u32     reserved;
 116         u32     dma_ctrl;
 117         u32     dma_frm_buf_base_addr_0;
 118         u32     dma_frm_buf_ceiling_addr_0;
 119         u32     dma_frm_buf_base_addr_1;
 120         u32     dma_frm_buf_ceiling_addr_1;
 121         u32     resv1;
 122         u32     raw_stat;
 123         u32     masked_stat;
 124         u32     int_ena_set;
 125         u32     int_ena_clr;
 126         u32     end_of_int_ind;
 127         /* Clock registers available only on Version 2 */
 128         u32     clk_ena;
 129         u32     clk_reset;
 130 };
 131
 132 #define LCD_NUM_BUFFERS 1
 133
 134 #define WSI_TIMEOUT     50
 135 #define PALETTE_SIZE    256
 136 #define LEFT_MARGIN     64
 137 #define RIGHT_MARGIN    64
 138 #define UPPER_MARGIN    32
 139 #define LOWER_MARGIN    32
 140 #define WAIT_FOR_FRAME_DONE     true
 141 #define NO_WAIT_FOR_FRAME_DONE  false
 142
 143 #define calc_fbsize() (panel.plnSizeX * panel.plnSizeY * panel.gdfBytesPP)
 144
 145 static struct da8xx_lcd_regs *da8xx_fb_reg_base;
 146
 147 DECLARE_GLOBAL_DATA_PTR;
 148
 149 /* graphics setup */
 150 static GraphicDevice gpanel;
 151 static const struct da8xx_panel *lcd_panel;
 152 static struct fb_info *da8xx_fb_info;
 153 static int bits_x_pixel;
 154 static unsigned int lcd_revision;
 155 const struct lcd_ctrl_config *da8xx_lcd_cfg;
 156
 157 static inline unsigned int lcdc_read(u32 *addr)
 158 {
 159         return (unsigned int)readl(addr);
 160 }
 161
 162 static inline void lcdc_write(unsigned int val, u32 *addr)
 163 {
 164         writel(val, addr);
 165 }
 166
 167 struct da8xx_fb_par {
 168         u32                      p_palette_base;
 169         unsigned char *v_palette_base;
 170         dma_addr_t              vram_phys;
 171         unsigned long           vram_size;
 172         void                    *vram_virt;
 173         unsigned int            dma_start;
 174         unsigned int            dma_end;
 175         struct clk *lcdc_clk;
 176         int irq;
 177         unsigned short pseudo_palette[16];
 178         unsigned int palette_sz;
 179         unsigned int pxl_clk;
 180         int blank;
 181         int                     vsync_flag;
 182         int                     vsync_timeout;
 183 };
 184
 185
 186 /* Variable Screen Information */
 187 static struct fb_var_screeninfo da8xx_fb_var = {
 188         .xoffset = 0,
 189         .yoffset = 0,
 190         .transp = {0, 0, 0},
 191         .nonstd = 0,
 192         .activate = 0,
 193         .height = -1,
 194         .width = -1,
 195         .pixclock = 46666,      /* 46us - AUO display */
 196         .accel_flags = 0,
 197         .left_margin = LEFT_MARGIN,
 198         .right_margin = RIGHT_MARGIN,
 199         .upper_margin = UPPER_MARGIN,
 200         .lower_margin = LOWER_MARGIN,
 201         .sync = 0,
 202         .vmode = FB_VMODE_NONINTERLACED
 203 };
 204
 205 static struct fb_fix_screeninfo da8xx_fb_fix = {
 206         .id = "DA8xx FB Drv",
 207         .type = FB_TYPE_PACKED_PIXELS,
 208         .type_aux = 0,
 209         .visual = FB_VISUAL_PSEUDOCOLOR,
 210         .xpanstep = 0,
 211         .ypanstep = 1,
 212         .ywrapstep = 0,
 213         .accel = FB_ACCEL_NONE
 214 };
 215
 216 /* Enable the Raster Engine of the LCD Controller */
 217 static inline void lcd_enable_raster(void)
 218 {
 219         u32 reg;
 220
 221         /* Put LCDC in reset for several cycles */
 222         if (lcd_revision == LCD_VERSION_2)
 223                 lcdc_write(LCD_CLK_MAIN_RESET,
 224                            &da8xx_fb_reg_base->clk_reset);
 225
 226         udelay(1000);
 227         /* Bring LCDC out of reset */
 228         if (lcd_revision == LCD_VERSION_2)
 229                 lcdc_write(0,
 230                            &da8xx_fb_reg_base->clk_reset);
 231
 232         udelay(1000);
 233
 234         reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
 235         if (!(reg & LCD_RASTER_ENABLE))
 236                 lcdc_write(reg | LCD_RASTER_ENABLE,
 237                         &da8xx_fb_reg_base->raster_ctrl);
 238 }
 239
 240 /* Disable the Raster Engine of the LCD Controller */
 241 static inline void lcd_disable_raster(bool wait_for_frame_done)
 242 {
 243         u32 reg;
 244         u32 loop_cnt = 0;
 245         u32 stat;
 246         u32 i = 0;
 247
 248         if (wait_for_frame_done)
 249                 loop_cnt = 5000;
 250
 251         reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
 252         if (reg & LCD_RASTER_ENABLE)
 253                 lcdc_write(reg & ~LCD_RASTER_ENABLE,
 254                         &da8xx_fb_reg_base->raster_ctrl);
 255
 256         /* Wait for the current frame to complete */
 257         do {
 258                 if (lcd_revision == LCD_VERSION_1)
 259                         stat = lcdc_read(&da8xx_fb_reg_base->stat);
 260                 else
 261                         stat = lcdc_read(&da8xx_fb_reg_base->raw_stat);
 262
 263                 mdelay(1);
 264         } while (!(stat & 0x01) && (i++ < loop_cnt));
 265
 266         if (lcd_revision == LCD_VERSION_1)
 267                 lcdc_write(stat, &da8xx_fb_reg_base->stat);
 268         else
 269                 lcdc_write(stat, &da8xx_fb_reg_base->raw_stat);
 270
 271         if ((loop_cnt != 0) && (i >= loop_cnt)) {
 272                 printf("LCD Controller timed out\n");
 273                 return;
 274         }
 275 }
 276
 277 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
 278 {
 279         u32 start;
 280         u32 end;
 281         u32 reg_ras;
 282         u32 reg_dma;
 283         u32 reg_int;
 284
 285         /* init reg to clear PLM (loading mode) fields */
 286         reg_ras = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
 287         reg_ras &= ~(3 << 20);
 288
 289         reg_dma  = lcdc_read(&da8xx_fb_reg_base->dma_ctrl);
 290
 291         if (load_mode == LOAD_DATA) {
 292                 start    = par->dma_start;
 293                 end      = par->dma_end;
 294
 295                 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
 296                 if (lcd_revision == LCD_VERSION_1) {
 297                         reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
 298                 } else {
 299                         reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
 300                                 LCD_V2_END_OF_FRAME0_INT_ENA |
 301                                 LCD_V2_END_OF_FRAME1_INT_ENA |
 302                                 LCD_V2_UNDERFLOW_INT_ENA | LCD_SYNC_LOST;
 303                         lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
 304                 }
 305
 306 #if (LCD_NUM_BUFFERS == 2)
 307                 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
 308                 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 309                 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 310                 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
 311                 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
 312 #else
 313                 reg_dma &= ~LCD_DUAL_FRAME_BUFFER_ENABLE;
 314                 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 315                 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 316                 lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
 317                 lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
 318 #endif
 319
 320         } else if (load_mode == LOAD_PALETTE) {
 321                 start    = par->p_palette_base;
 322                 end      = start + par->palette_sz - 1;
 323
 324                 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
 325                 if (lcd_revision == LCD_VERSION_1) {
 326                         reg_ras |= LCD_V1_PL_INT_ENA;
 327                 } else {
 328                         reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
 329                                 LCD_V2_PL_INT_ENA;
 330                         lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
 331                 }
 332
 333                 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 334                 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 335         }
 336
 337         lcdc_write(reg_dma, &da8xx_fb_reg_base->dma_ctrl);
 338         lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
 339
 340         /*
 341          * The Raster enable bit must be set after all other control fields are
 342          * set.
 343          */
 344         lcd_enable_raster();
 345 }
 346
 347 /* Configure the Burst Size of DMA */
 348 static int lcd_cfg_dma(int burst_size)
 349 {
 350         u32 reg;
 351
 352         reg = lcdc_read(&da8xx_fb_reg_base->dma_ctrl) & 0x00000001;
 353         switch (burst_size) {
 354         case 1:
 355                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
 356                 break;
 357         case 2:
 358                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
 359                 break;
 360         case 4:
 361                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
 362                 break;
 363         case 8:
 364                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
 365                 break;
 366         case 16:
 367                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
 368                 break;
 369         default:
 370                 return -EINVAL;
 371         }
 372         lcdc_write(reg, &da8xx_fb_reg_base->dma_ctrl);
 373
 374         return 0;
 375 }
 376
 377 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
 378 {
 379         u32 reg;
 380
 381         /* Set the AC Bias Period and Number of Transitions per Interrupt */
 382         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2) & 0xFFF00000;
 383         reg |= LCD_AC_BIAS_FREQUENCY(period) |
 384                 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
 385         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
 386 }
 387
 388 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
 389                 int front_porch)
 390 {
 391         u32 reg;
 392
 393         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0) & 0xf;
 394         reg |= ((back_porch & 0xff) << 24)
 395             | ((front_porch & 0xff) << 16)
 396             | ((pulse_width & 0x3f) << 10);
 397         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
 398 }
 399
 400 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
 401                 int front_porch)
 402 {
 403         u32 reg;
 404
 405         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1) & 0x3ff;
 406         reg |= ((back_porch & 0xff) << 24)
 407             | ((front_porch & 0xff) << 16)
 408             | ((pulse_width & 0x3f) << 10);
 409         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
 410 }
 411
 412 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
 413 {
 414         u32 reg;
 415         u32 reg_int;
 416
 417         reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(LCD_TFT_MODE |
 418                                                 LCD_MONO_8BIT_MODE |
 419                                                 LCD_MONOCHROME_MODE);
 420
 421         switch (cfg->p_disp_panel->panel_shade) {
 422         case MONOCHROME:
 423                 reg |= LCD_MONOCHROME_MODE;
 424                 if (cfg->mono_8bit_mode)
 425                         reg |= LCD_MONO_8BIT_MODE;
 426                 break;
 427         case COLOR_ACTIVE:
 428                 reg |= LCD_TFT_MODE;
 429                 if (cfg->tft_alt_mode)
 430                         reg |= LCD_TFT_ALT_ENABLE;
 431                 break;
 432
 433         case COLOR_PASSIVE:
 434                 if (cfg->stn_565_mode)
 435                         reg |= LCD_STN_565_ENABLE;
 436                 break;
 437
 438         default:
 439                 return -EINVAL;
 440         }
 441
 442         /* enable additional interrupts here */
 443         if (lcd_revision == LCD_VERSION_1) {
 444                 reg |= LCD_V1_UNDERFLOW_INT_ENA;
 445         } else {
 446                 reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
 447                         LCD_V2_UNDERFLOW_INT_ENA;
 448                 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
 449         }
 450
 451         lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
 452
 453         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2);
 454
 455         if (cfg->sync_ctrl)
 456                 reg |= LCD_SYNC_CTRL;
 457         else
 458                 reg &= ~LCD_SYNC_CTRL;
 459
 460         if (cfg->sync_edge)
 461                 reg |= LCD_SYNC_EDGE;
 462         else
 463                 reg &= ~LCD_SYNC_EDGE;
 464
 465         if (cfg->invert_line_clock)
 466                 reg |= LCD_INVERT_LINE_CLOCK;
 467         else
 468                 reg &= ~LCD_INVERT_LINE_CLOCK;
 469
 470         if (cfg->invert_frm_clock)
 471                 reg |= LCD_INVERT_FRAME_CLOCK;
 472         else
 473                 reg &= ~LCD_INVERT_FRAME_CLOCK;
 474
 475         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
 476
 477         return 0;
 478 }
 479
 480 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
 481                 u32 bpp, u32 raster_order)
 482 {
 483         u32 reg;
 484
 485         /* Set the Panel Width */
 486         /* Pixels per line = (PPL + 1)*16 */
 487         if (lcd_revision == LCD_VERSION_1) {
 488                 /*
 489                  * 0x3F in bits 4..9 gives max horizontal resolution = 1024
 490                  * pixels
 491                  */
 492                 width &= 0x3f0;
 493         } else {
 494                 /*
 495                  * 0x7F in bits 4..10 gives max horizontal resolution = 2048
 496                  * pixels.
 497                  */
 498                 width &= 0x7f0;
 499         }
 500         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0);
 501         reg &= 0xfffffc00;
 502         if (lcd_revision == LCD_VERSION_1) {
 503                 reg |= ((width >> 4) - 1) << 4;
 504         } else {
 505                 width = (width >> 4) - 1;
 506                 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
 507         }
 508         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
 509
 510         /* Set the Panel Height */
 511         /* Set bits 9:0 of Lines Per Pixel */
 512         reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1);
 513         reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
 514         lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
 515
 516         /* Set bit 10 of Lines Per Pixel */
 517         if (lcd_revision == LCD_VERSION_2) {
 518                 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2);
 519                 reg |= ((height - 1) & 0x400) << 16;
 520                 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
 521         }
 522
 523         /* Set the Raster Order of the Frame Buffer */
 524         reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(1 << 8);
 525         if (raster_order)
 526                 reg |= LCD_RASTER_ORDER;
 527
 528         if (bpp == 24)
 529                 reg |= (LCD_TFT_MODE | LCD_V2_TFT_24BPP_MODE);
 530         else if (bpp == 32)
 531                 reg |= (LCD_TFT_MODE | LCD_V2_TFT_24BPP_MODE
 532                                 | LCD_V2_TFT_24BPP_UNPACK);
 533
 534         lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
 535
 536         switch (bpp) {
 537         case 1:
 538         case 2:
 539         case 4:
 540         case 16:
 541         case 24:
 542         case 32:
 543                 par->palette_sz = 16 * 2;
 544                 break;
 545
 546         case 8:
 547                 par->palette_sz = 256 * 2;
 548                 break;
 549
 550         default:
 551                 return -EINVAL;
 552         }
 553
 554         return 0;
 555 }
 556
 557 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
 558                               unsigned blue, unsigned transp,
 559                               struct fb_info *info)
 560 {
 561         struct da8xx_fb_par *par = info->par;
 562         unsigned short *palette = (unsigned short *) par->v_palette_base;
 563         u_short pal;
 564         int update_hw = 0;
 565
 566         if (regno > 255)
 567                 return 1;
 568
 569         if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
 570                 return 1;
 571
 572         if (info->var.bits_per_pixel == 8) {
 573                 red >>= 4;
 574                 green >>= 8;
 575                 blue >>= 12;
 576
 577                 pal = (red & 0x0f00);
 578                 pal |= (green & 0x00f0);
 579                 pal |= (blue & 0x000f);
 580
 581                 if (palette[regno] != pal) {
 582                         update_hw = 1;
 583                         palette[regno] = pal;
 584                 }
 585         } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
 586                 red >>= (16 - info->var.red.length);
 587                 red <<= info->var.red.offset;
 588
 589                 green >>= (16 - info->var.green.length);
 590                 green <<= info->var.green.offset;
 591
 592                 blue >>= (16 - info->var.blue.length);
 593                 blue <<= info->var.blue.offset;
 594
 595                 par->pseudo_palette[regno] = red | green | blue;
 596
 597                 if (palette[0] != 0x4000) {
 598                         update_hw = 1;
 599                         palette[0] = 0x4000;
 600                 }
 601         } else if (((info->var.bits_per_pixel == 32) && regno < 32) ||
 602                    ((info->var.bits_per_pixel == 24) && regno < 24)) {
 603                 red >>= (24 - info->var.red.length);
 604                 red <<= info->var.red.offset;
 605
 606                 green >>= (24 - info->var.green.length);
 607                 green <<= info->var.green.offset;
 608
 609                 blue >>= (24 - info->var.blue.length);
 610                 blue <<= info->var.blue.offset;
 611
 612                 par->pseudo_palette[regno] = red | green | blue;
 613
 614                 if (palette[0] != 0x4000) {
 615                         update_hw = 1;
 616                         palette[0] = 0x4000;
 617                 }
 618         }
 619
 620         /* Update the palette in the h/w as needed. */
 621         if (update_hw)
 622                 lcd_blit(LOAD_PALETTE, par);
 623
 624         return 0;
 625 }
 626
 627 static void lcd_reset(struct da8xx_fb_par *par)
 628 {
 629         /* Disable the Raster if previously Enabled */
 630         lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
 631
 632         /* DMA has to be disabled */
 633         lcdc_write(0, &da8xx_fb_reg_base->dma_ctrl);
 634         lcdc_write(0, &da8xx_fb_reg_base->raster_ctrl);
 635
 636         if (lcd_revision == LCD_VERSION_2) {
 637                 lcdc_write(0, &da8xx_fb_reg_base->int_ena_set);
 638                 /* Write 1 to reset */
 639                 lcdc_write(LCD_CLK_MAIN_RESET, &da8xx_fb_reg_base->clk_reset);
 640                 lcdc_write(0, &da8xx_fb_reg_base->clk_reset);
 641         }
 642 }
 643
 644 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
 645 {
 646         unsigned int lcd_clk, div;
 647
 648         /* Get clock from sysclk2 */
 649         lcd_clk = clk_get(2);
 650
 651         div = lcd_clk / par->pxl_clk;
 652         debug("LCD Clock: %d Divider: %d PixClk: %d\n",
 653               lcd_clk, div, par->pxl_clk);
 654
 655         /* Configure the LCD clock divisor. */
 656         lcdc_write(LCD_CLK_DIVISOR(div) |
 657                         (LCD_RASTER_MODE & 0x1), &da8xx_fb_reg_base->ctrl);
 658
 659         if (lcd_revision == LCD_VERSION_2)
 660                 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
 661                                 LCD_V2_CORE_CLK_EN,
 662                                 &da8xx_fb_reg_base->clk_ena);
 663 }
 664
 665 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
 666                 const struct da8xx_panel *panel)
 667 {
 668         u32 bpp;
 669         int ret = 0;
 670
 671         lcd_reset(par);
 672
 673         /* Calculate the divider */
 674         lcd_calc_clk_divider(par);
 675
 676         if (panel->invert_pxl_clk)
 677                 lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) |
 678                         LCD_INVERT_PIXEL_CLOCK),
 679                          &da8xx_fb_reg_base->raster_timing_2);
 680         else
 681                 lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) &
 682                         ~LCD_INVERT_PIXEL_CLOCK),
 683                         &da8xx_fb_reg_base->raster_timing_2);
 684
 685         /* Configure the DMA burst size. */
 686         ret = lcd_cfg_dma(cfg->dma_burst_sz);
 687         if (ret < 0)
 688                 return ret;
 689
 690         /* Configure the AC bias properties. */
 691         lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
 692
 693         /* Configure the vertical and horizontal sync properties. */
 694         lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
 695         lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
 696
 697         /* Configure for display */
 698         ret = lcd_cfg_display(cfg);
 699         if (ret < 0)
 700                 return ret;
 701
 702         if ((QVGA != cfg->p_disp_panel->panel_type) &&
 703             (WVGA != cfg->p_disp_panel->panel_type))
 704                 return -EINVAL;
 705
 706         if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
 707             cfg->bpp >= cfg->p_disp_panel->min_bpp)
 708                 bpp = cfg->bpp;
 709         else
 710                 bpp = cfg->p_disp_panel->max_bpp;
 711         if (bpp == 12)
 712                 bpp = 16;
 713         ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
 714                                 (unsigned int)panel->height, bpp,
 715                                 cfg->raster_order);
 716         if (ret < 0)
 717                 return ret;
 718
 719         /* Configure FDD */
 720         lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & 0xfff00fff) |
 721                        (cfg->fdd << 12), &da8xx_fb_reg_base->raster_ctrl);
 722
 723         return 0;
 724 }
 725
 726 static void lcdc_dma_start(void)
 727 {
 728         struct da8xx_fb_par *par = da8xx_fb_info->par;
 729         lcdc_write(par->dma_start,
 730                 &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 731         lcdc_write(par->dma_end,
 732                 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 733         lcdc_write(0,
 734                 &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
 735         lcdc_write(0,
 736                 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
 737 }
 738
 739 static u32 lcdc_irq_handler_rev01(void)
 740 {
 741         struct da8xx_fb_par *par = da8xx_fb_info->par;
 742         u32 stat = lcdc_read(&da8xx_fb_reg_base->stat);
 743         u32 reg_ras;
 744
 745         if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
 746                 debug("LCD_SYNC_LOST\n");
 747                 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
 748                 lcdc_write(stat, &da8xx_fb_reg_base->stat);
 749                 lcd_enable_raster();
 750                 return LCD_SYNC_LOST;
 751         } else if (stat & LCD_PL_LOAD_DONE) {
 752                 debug("LCD_PL_LOAD_DONE\n");
 753                 /*
 754                  * Must disable raster before changing state of any control bit.
 755                  * And also must be disabled before clearing the PL loading
 756                  * interrupt via the following write to the status register. If
 757                  * this is done after then one gets multiple PL done interrupts.
 758                  */
 759                 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
 760
 761                 lcdc_write(stat, &da8xx_fb_reg_base->stat);
 762
 763                 /* Disable PL completion interrupt */
 764                 reg_ras  = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
 765                 reg_ras &= ~LCD_V1_PL_INT_ENA;
 766                 lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
 767
 768                 /* Setup and start data loading mode */
 769                 lcd_blit(LOAD_DATA, par);
 770                 return LCD_PL_LOAD_DONE;
 771         } else {
 772                 lcdc_write(stat, &da8xx_fb_reg_base->stat);
 773
 774                 if (stat & LCD_END_OF_FRAME0)
 775                         debug("LCD_END_OF_FRAME0\n");
 776
 777                 lcdc_write(par->dma_start,
 778                         &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 779                 lcdc_write(par->dma_end,
 780                         &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 781                 par->vsync_flag = 1;
 782                 return LCD_END_OF_FRAME0;
 783         }
 784         return stat;
 785 }
 786
 787 static u32 lcdc_irq_handler_rev02(void)
 788 {
 789         struct da8xx_fb_par *par = da8xx_fb_info->par;
 790         u32 stat = lcdc_read(&da8xx_fb_reg_base->masked_stat);
 791         u32 reg_int;
 792
 793         if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
 794                 debug("LCD_SYNC_LOST\n");
 795                 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
 796                 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
 797                 lcd_enable_raster();
 798                 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
 799                 return LCD_SYNC_LOST;
 800         } else if (stat & LCD_PL_LOAD_DONE) {
 801                 debug("LCD_PL_LOAD_DONE\n");
 802                 /*
 803                  * Must disable raster before changing state of any control bit.
 804                  * And also must be disabled before clearing the PL loading
 805                  * interrupt via the following write to the status register. If
 806                  * this is done after then one gets multiple PL done interrupts.
 807                  */
 808                 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
 809
 810                 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
 811
 812                 /* Disable PL completion interrupt */
 813                 reg_int  = lcdc_read(&da8xx_fb_reg_base->int_ena_clr) |
 814                         (LCD_V2_PL_INT_ENA);
 815                 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_clr);
 816
 817                 /* Setup and start data loading mode */
 818                 lcd_blit(LOAD_DATA, par);
 819                 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
 820                 return LCD_PL_LOAD_DONE;
 821         } else {
 822                 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
 823
 824                 if (stat & LCD_END_OF_FRAME0)
 825                         debug("LCD_END_OF_FRAME0\n");
 826
 827                 lcdc_write(par->dma_start,
 828                            &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
 829                 lcdc_write(par->dma_end,
 830                            &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
 831                 par->vsync_flag = 1;
 832                 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
 833                 return LCD_END_OF_FRAME0;
 834         }
 835         lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
 836         return stat;
 837 }
 838
 839 static u32 lcdc_irq_handler(void)
 840 {
 841         if (lcd_revision == LCD_VERSION_1)
 842                 return lcdc_irq_handler_rev01();
 843         else
 844                 return lcdc_irq_handler_rev02();
 845 }
 846
 847 static u32 wait_for_event(u32 event)
 848 {
 849         u32 timeout = 50000;
 850         u32 ret;
 851
 852         do {
 853                 ret = lcdc_irq_handler();
 854                 udelay(1000);
 855                 --timeout;
 856         } while (!(ret & event) && timeout);
 857
 858         if (!(ret & event)) {
 859                 printf("%s: event %d not hit\n", __func__, event);
 860                 return -1;
 861         }
 862
 863         return 0;
 864
 865 }
 866
 867 void *video_hw_init(void)
 868 {
 869         struct da8xx_fb_par *par;
 870         u32 size;
 871         u32 rev;
 872         char *p;
 873
 874         if (!lcd_panel) {
 875                 printf("Display not initialized\n");
 876                 return NULL;
 877         }
 878         gpanel.winSizeX = lcd_panel->width;
 879         gpanel.winSizeY = lcd_panel->height;
 880         gpanel.plnSizeX = lcd_panel->width;
 881         gpanel.plnSizeY = lcd_panel->height;
 882
 883         switch (bits_x_pixel) {
 884         case 32:
 885                 gpanel.gdfBytesPP = 4;
 886                 gpanel.gdfIndex = GDF_32BIT_X888RGB;
 887                 break;
 888         case 24:
 889                 gpanel.gdfBytesPP = 4;
 890                 gpanel.gdfIndex = GDF_32BIT_X888RGB;
 891                 break;
 892         case 16:
 893                 gpanel.gdfBytesPP = 2;
 894                 gpanel.gdfIndex = GDF_16BIT_565RGB;
 895                 break;
 896         default:
 897                 gpanel.gdfBytesPP = 1;
 898                 gpanel.gdfIndex = GDF__8BIT_INDEX;
 899                 break;
 900         }
 901
 902         da8xx_fb_reg_base = (struct da8xx_lcd_regs *)DA8XX_LCD_CNTL_BASE;
 903
 904         /* Determine LCD IP Version */
 905         rev = lcdc_read(&da8xx_fb_reg_base->revid);
 906         switch (rev) {
 907         case 0x4C100102:
 908                 lcd_revision = LCD_VERSION_1;
 909                 break;
 910         case 0x4F200800:
 911         case 0x4F201000:
 912                 lcd_revision = LCD_VERSION_2;
 913                 break;
 914         default:
 915                 printf("Unknown PID Reg value 0x%x, defaulting to LCD revision 1\n",
 916                        rev);
 917                 lcd_revision = LCD_VERSION_1;
 918                 break;
 919         }
 920
 921         debug("rev: 0x%x Resolution: %dx%d %d\n", rev,
 922               gpanel.winSizeX,
 923               gpanel.winSizeY,
 924               da8xx_lcd_cfg->bpp);
 925
 926         size = sizeof(struct fb_info) + sizeof(struct da8xx_fb_par);
 927         da8xx_fb_info = malloc_cache_aligned(size);
 928         debug("da8xx_fb_info at %x\n", (unsigned int)da8xx_fb_info);
 929
 930         if (!da8xx_fb_info) {
 931                 printf("Memory allocation failed for fb_info\n");
 932                 return NULL;
 933         }
 934         memset(da8xx_fb_info, 0, size);
 935         p = (char *)da8xx_fb_info;
 936         da8xx_fb_info->par = p +  sizeof(struct fb_info);
 937         debug("da8xx_par at %x\n", (unsigned int)da8xx_fb_info->par);
 938
 939         par = da8xx_fb_info->par;
 940         par->pxl_clk = lcd_panel->pxl_clk;
 941
 942         if (lcd_init(par, da8xx_lcd_cfg, lcd_panel) < 0) {
 943                 printf("lcd_init failed\n");
 944                 goto err_release_fb;
 945         }
 946
 947         /* allocate frame buffer */
 948         par->vram_size = lcd_panel->width * lcd_panel->height *
 949                         da8xx_lcd_cfg->bpp;
 950         par->vram_size = par->vram_size * LCD_NUM_BUFFERS / 8;
 951
 952         par->vram_virt = malloc_cache_aligned(par->vram_size);
 953
 954         par->vram_phys = (dma_addr_t) par->vram_virt;
 955         debug("Requesting 0x%x bytes for framebuffer at 0x%x\n",
 956                 (unsigned int)par->vram_size,
 957                 (unsigned int)par->vram_virt);
 958         if (!par->vram_virt) {
 959                 printf("GLCD: malloc for frame buffer failed\n");
 960                 goto err_release_fb;
 961         }
 962         gd->fb_base = (int)par->vram_virt;
 963
 964         gpanel.frameAdrs = (unsigned int)par->vram_virt;
 965         da8xx_fb_info->screen_base = (char *) par->vram_virt;
 966         da8xx_fb_fix.smem_start = gpanel.frameAdrs;
 967         da8xx_fb_fix.smem_len = par->vram_size;
 968         da8xx_fb_fix.line_length = (lcd_panel->width * da8xx_lcd_cfg->bpp) / 8;
 969
 970         par->dma_start = par->vram_phys;
 971         par->dma_end   = par->dma_start + lcd_panel->height *
 972                 da8xx_fb_fix.line_length - 1;
 973
 974         /* allocate palette buffer */
 975         par->v_palette_base = malloc_cache_aligned(PALETTE_SIZE);
 976         if (!par->v_palette_base) {
 977                 printf("GLCD: malloc for palette buffer failed\n");
 978                 goto err_release_fb_mem;
 979         }
 980         memset(par->v_palette_base, 0, PALETTE_SIZE);
 981         par->p_palette_base = (unsigned int)par->v_palette_base;
 982
 983         /* Initialize par */
 984         da8xx_fb_info->var.bits_per_pixel = da8xx_lcd_cfg->bpp;
 985
 986         da8xx_fb_var.xres = lcd_panel->width;
 987         da8xx_fb_var.xres_virtual = lcd_panel->width;
 988
 989         da8xx_fb_var.yres         = lcd_panel->height;
 990         da8xx_fb_var.yres_virtual = lcd_panel->height * LCD_NUM_BUFFERS;
 991
 992         da8xx_fb_var.grayscale =
 993             da8xx_lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
 994         da8xx_fb_var.bits_per_pixel = da8xx_lcd_cfg->bpp;
 995
 996         da8xx_fb_var.hsync_len = lcd_panel->hsw;
 997         da8xx_fb_var.vsync_len = lcd_panel->vsw;
 998
 999         /* Initialize fbinfo */
1000         da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1001         da8xx_fb_info->fix = da8xx_fb_fix;
1002         da8xx_fb_info->var = da8xx_fb_var;
1003         da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1004         da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1005                                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1006
1007         /* Clear interrupt */
1008         memset((void *)par->vram_virt, 0, par->vram_size);
1009         lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
1010         if (lcd_revision == LCD_VERSION_1)
1011                 lcdc_write(0xFFFF, &da8xx_fb_reg_base->stat);
1012         else
1013                 lcdc_write(0xFFFF, &da8xx_fb_reg_base->masked_stat);
1014         debug("Palette at 0x%x size %d\n", par->p_palette_base,
1015                 par->palette_sz);
1016         lcdc_dma_start();
1017
1018         /* Load a default palette */
1019         fb_setcolreg(0, 0, 0, 0, 0xffff, da8xx_fb_info);
1020
1021         /* Check that the palette is loaded */
1022         wait_for_event(LCD_PL_LOAD_DONE);
1023
1024         /* Wait until DMA is working */
1025         wait_for_event(LCD_END_OF_FRAME0);
1026
1027         return (void *)&gpanel;
1028
1029 err_release_fb_mem:
1030         free(par->vram_virt);
1031
1032 err_release_fb:
1033         free(da8xx_fb_info);
1034
1035         return NULL;
1036 }
1037
1038 void da8xx_video_init(const struct da8xx_panel *panel,
1039                       const struct lcd_ctrl_config *lcd_cfg, int bits_pixel)
1040 {
1041         lcd_panel = panel;
1042         da8xx_lcd_cfg = lcd_cfg;
1043         bits_x_pixel = bits_pixel;
1044 }