drivers/video/da8xx-fb.c

   1 /*
   2  * Copyright (C) 2008-2009 MontaVista Software Inc.
   3  * Copyright (C) 2008-2009 Texas Instruments Inc
   4  *
   5  * Based on the LCD driver for TI Avalanche processors written by
   6  * Ajay Singh and Shalom Hai.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option)any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/fb.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/device.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/clk.h>
  31 #include <linux/cpufreq.h>
  32 #include <linux/console.h>
  33 #include <linux/slab.h>
  34 #include <video/da8xx-fb.h>
  35
  36 #define DRIVER_NAME "da8xx_lcdc"
  37
  38 #define LCD_VERSION_1   1
  39 #define LCD_VERSION_2   2
  40
  41 /* LCD Status Register */
  42 #define LCD_END_OF_FRAME1               BIT(9)
  43 #define LCD_END_OF_FRAME0               BIT(8)
  44 #define LCD_PL_LOAD_DONE                BIT(6)
  45 #define LCD_FIFO_UNDERFLOW              BIT(5)
  46 #define LCD_SYNC_LOST                   BIT(2)
  47
  48 /* LCD DMA Control Register */
  49 #define LCD_DMA_BURST_SIZE(x)           ((x) << 4)
  50 #define LCD_DMA_BURST_1                 0x0
  51 #define LCD_DMA_BURST_2                 0x1
  52 #define LCD_DMA_BURST_4                 0x2
  53 #define LCD_DMA_BURST_8                 0x3
  54 #define LCD_DMA_BURST_16                0x4
  55 #define LCD_V1_END_OF_FRAME_INT_ENA     BIT(2)
  56 #define LCD_V2_END_OF_FRAME0_INT_ENA    BIT(8)
  57 #define LCD_V2_END_OF_FRAME1_INT_ENA    BIT(9)
  58 #define LCD_DUAL_FRAME_BUFFER_ENABLE    BIT(0)
  59
  60 /* LCD Control Register */
  61 #define LCD_CLK_DIVISOR(x)              ((x) << 8)
  62 #define LCD_RASTER_MODE                 0x01
  63
  64 /* LCD Raster Control Register */
  65 #define LCD_PALETTE_LOAD_MODE(x)        ((x) << 20)
  66 #define PALETTE_AND_DATA                0x00
  67 #define PALETTE_ONLY                    0x01
  68 #define DATA_ONLY                       0x02
  69
  70 #define LCD_MONO_8BIT_MODE              BIT(9)
  71 #define LCD_RASTER_ORDER                BIT(8)
  72 #define LCD_TFT_MODE                    BIT(7)
  73 #define LCD_V1_UNDERFLOW_INT_ENA        BIT(6)
  74 #define LCD_V2_UNDERFLOW_INT_ENA        BIT(5)
  75 #define LCD_V1_PL_INT_ENA               BIT(4)
  76 #define LCD_V2_PL_INT_ENA               BIT(6)
  77 #define LCD_MONOCHROME_MODE             BIT(1)
  78 #define LCD_RASTER_ENABLE               BIT(0)
  79 #define LCD_TFT_ALT_ENABLE              BIT(23)
  80 #define LCD_STN_565_ENABLE              BIT(24)
  81 #define LCD_V2_DMA_CLK_EN               BIT(2)
  82 #define LCD_V2_LIDD_CLK_EN              BIT(1)
  83 #define LCD_V2_CORE_CLK_EN              BIT(0)
  84 #define LCD_V2_LPP_B10                  26
  85
  86 /* LCD Raster Timing 2 Register */
  87 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x)      ((x) << 16)
  88 #define LCD_AC_BIAS_FREQUENCY(x)                ((x) << 8)
  89 #define LCD_SYNC_CTRL                           BIT(25)
  90 #define LCD_SYNC_EDGE                           BIT(24)
  91 #define LCD_INVERT_PIXEL_CLOCK                  BIT(22)
  92 #define LCD_INVERT_LINE_CLOCK                   BIT(21)
  93 #define LCD_INVERT_FRAME_CLOCK                  BIT(20)
  94
  95 /* LCD Block */
  96 #define  LCD_PID_REG                            0x0
  97 #define  LCD_CTRL_REG                           0x4
  98 #define  LCD_STAT_REG                           0x8
  99 #define  LCD_RASTER_CTRL_REG                    0x28
 100 #define  LCD_RASTER_TIMING_0_REG                0x2C
 101 #define  LCD_RASTER_TIMING_1_REG                0x30
 102 #define  LCD_RASTER_TIMING_2_REG                0x34
 103 #define  LCD_DMA_CTRL_REG                       0x40
 104 #define  LCD_DMA_FRM_BUF_BASE_ADDR_0_REG        0x44
 105 #define  LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG     0x48
 106 #define  LCD_DMA_FRM_BUF_BASE_ADDR_1_REG        0x4C
 107 #define  LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG     0x50
 108
 109 /* Interrupt Registers available only in Version 2 */
 110 #define  LCD_RAW_STAT_REG                       0x58
 111 #define  LCD_MASKED_STAT_REG                    0x5c
 112 #define  LCD_INT_ENABLE_SET_REG                 0x60
 113 #define  LCD_INT_ENABLE_CLR_REG                 0x64
 114 #define  LCD_END_OF_INT_IND_REG                 0x68
 115
 116 /* Clock registers available only on Version 2 */
 117 #define  LCD_CLK_ENABLE_REG                     0x6c
 118 #define  LCD_CLK_RESET_REG                      0x70
 119
 120 #define LCD_NUM_BUFFERS 2
 121
 122 #define WSI_TIMEOUT     50
 123 #define PALETTE_SIZE    256
 124 #define LEFT_MARGIN     64
 125 #define RIGHT_MARGIN    64
 126 #define UPPER_MARGIN    32
 127 #define LOWER_MARGIN    32
 128
 129 static resource_size_t da8xx_fb_reg_base;
 130 static struct resource *lcdc_regs;
 131 static unsigned int lcd_revision;
 132 static irq_handler_t lcdc_irq_handler;
 133
 134 static inline unsigned int lcdc_read(unsigned int addr)
 135 {
 136         return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
 137 }
 138
 139 static inline void lcdc_write(unsigned int val, unsigned int addr)
 140 {
 141         __raw_writel(val, da8xx_fb_reg_base + (addr));
 142 }
 143
 144 struct da8xx_fb_par {
 145         resource_size_t p_palette_base;
 146         unsigned char *v_palette_base;
 147         dma_addr_t              vram_phys;
 148         unsigned long           vram_size;
 149         void                    *vram_virt;
 150         unsigned int            dma_start;
 151         unsigned int            dma_end;
 152         struct clk *lcdc_clk;
 153         int irq;
 154         unsigned short pseudo_palette[16];
 155         unsigned int palette_sz;
 156         unsigned int pxl_clk;
 157         int blank;
 158         wait_queue_head_t       vsync_wait;
 159         int                     vsync_flag;
 160         int                     vsync_timeout;
 161 #ifdef CONFIG_CPU_FREQ
 162         struct notifier_block   freq_transition;
 163 #endif
 164         void (*panel_power_ctrl)(int);
 165 };
 166
 167 /* Variable Screen Information */
 168 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
 169         .xoffset = 0,
 170         .yoffset = 0,
 171         .transp = {0, 0, 0},
 172         .nonstd = 0,
 173         .activate = 0,
 174         .height = -1,
 175         .width = -1,
 176         .pixclock = 46666,      /* 46us - AUO display */
 177         .accel_flags = 0,
 178         .left_margin = LEFT_MARGIN,
 179         .right_margin = RIGHT_MARGIN,
 180         .upper_margin = UPPER_MARGIN,
 181         .lower_margin = LOWER_MARGIN,
 182         .sync = 0,
 183         .vmode = FB_VMODE_NONINTERLACED
 184 };
 185
 186 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
 187         .id = "DA8xx FB Drv",
 188         .type = FB_TYPE_PACKED_PIXELS,
 189         .type_aux = 0,
 190         .visual = FB_VISUAL_PSEUDOCOLOR,
 191         .xpanstep = 0,
 192         .ypanstep = 1,
 193         .ywrapstep = 0,
 194         .accel = FB_ACCEL_NONE
 195 };
 196
 197 struct da8xx_panel {
 198         const char      name[25];       /* Full name <vendor>_<model> */
 199         unsigned short  width;
 200         unsigned short  height;
 201         int             hfp;            /* Horizontal front porch */
 202         int             hbp;            /* Horizontal back porch */
 203         int             hsw;            /* Horizontal Sync Pulse Width */
 204         int             vfp;            /* Vertical front porch */
 205         int             vbp;            /* Vertical back porch */
 206         int             vsw;            /* Vertical Sync Pulse Width */
 207         unsigned int    pxl_clk;        /* Pixel clock */
 208         unsigned char   invert_pxl_clk; /* Invert Pixel clock */
 209 };
 210
 211 static struct da8xx_panel known_lcd_panels[] = {
 212         /* Sharp LCD035Q3DG01 */
 213         [0] = {
 214                 .name = "Sharp_LCD035Q3DG01",
 215                 .width = 320,
 216                 .height = 240,
 217                 .hfp = 8,
 218                 .hbp = 6,
 219                 .hsw = 0,
 220                 .vfp = 2,
 221                 .vbp = 2,
 222                 .vsw = 0,
 223                 .pxl_clk = 4608000,
 224                 .invert_pxl_clk = 1,
 225         },
 226         /* Sharp LK043T1DG01 */
 227         [1] = {
 228                 .name = "Sharp_LK043T1DG01",
 229                 .width = 480,
 230                 .height = 272,
 231                 .hfp = 2,
 232                 .hbp = 2,
 233                 .hsw = 41,
 234                 .vfp = 2,
 235                 .vbp = 2,
 236                 .vsw = 10,
 237                 .pxl_clk = 7833600,
 238                 .invert_pxl_clk = 0,
 239         },
 240 };
 241
 242 /* Enable the Raster Engine of the LCD Controller */
 243 static inline void lcd_enable_raster(void)
 244 {
 245         u32 reg;
 246
 247         reg = lcdc_read(LCD_RASTER_CTRL_REG);
 248         if (!(reg & LCD_RASTER_ENABLE))
 249                 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
 250 }
 251
 252 /* Disable the Raster Engine of the LCD Controller */
 253 static inline void lcd_disable_raster(void)
 254 {
 255         u32 reg;
 256
 257         reg = lcdc_read(LCD_RASTER_CTRL_REG);
 258         if (reg & LCD_RASTER_ENABLE)
 259                 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
 260 }
 261
 262 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
 263 {
 264         u32 start;
 265         u32 end;
 266         u32 reg_ras;
 267         u32 reg_dma;
 268         u32 reg_int;
 269
 270         /* init reg to clear PLM (loading mode) fields */
 271         reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
 272         reg_ras &= ~(3 << 20);
 273
 274         reg_dma  = lcdc_read(LCD_DMA_CTRL_REG);
 275
 276         if (load_mode == LOAD_DATA) {
 277                 start    = par->dma_start;
 278                 end      = par->dma_end;
 279
 280                 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
 281                 if (lcd_revision == LCD_VERSION_1) {
 282                         reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
 283                 } else {
 284                         reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
 285                                 LCD_V2_END_OF_FRAME0_INT_ENA |
 286                                 LCD_V2_END_OF_FRAME1_INT_ENA;
 287                         lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
 288                 }
 289                 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
 290
 291                 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
 292                 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
 293                 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
 294                 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
 295         } else if (load_mode == LOAD_PALETTE) {
 296                 start    = par->p_palette_base;
 297                 end      = start + par->palette_sz - 1;
 298
 299                 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
 300
 301                 if (lcd_revision == LCD_VERSION_1) {
 302                         reg_ras |= LCD_V1_PL_INT_ENA;
 303                 } else {
 304                         reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
 305                                 LCD_V2_PL_INT_ENA;
 306                         lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
 307                 }
 308
 309                 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
 310                 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
 311         }
 312
 313         lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
 314         lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
 315
 316         /*
 317          * The Raster enable bit must be set after all other control fields are
 318          * set.
 319          */
 320         lcd_enable_raster();
 321 }
 322
 323 /* Configure the Burst Size of DMA */
 324 static int lcd_cfg_dma(int burst_size)
 325 {
 326         u32 reg;
 327
 328         reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
 329         switch (burst_size) {
 330         case 1:
 331                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
 332                 break;
 333         case 2:
 334                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
 335                 break;
 336         case 4:
 337                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
 338                 break;
 339         case 8:
 340                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
 341                 break;
 342         case 16:
 343                 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348         lcdc_write(reg, LCD_DMA_CTRL_REG);
 349
 350         return 0;
 351 }
 352
 353 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
 354 {
 355         u32 reg;
 356
 357         /* Set the AC Bias Period and Number of Transisitons per Interrupt */
 358         reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
 359         reg |= LCD_AC_BIAS_FREQUENCY(period) |
 360                 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
 361         lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
 362 }
 363
 364 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
 365                 int front_porch)
 366 {
 367         u32 reg;
 368
 369         reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
 370         reg |= ((back_porch & 0xff) << 24)
 371             | ((front_porch & 0xff) << 16)
 372             | ((pulse_width & 0x3f) << 10);
 373         lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
 374 }
 375
 376 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
 377                 int front_porch)
 378 {
 379         u32 reg;
 380
 381         reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
 382         reg |= ((back_porch & 0xff) << 24)
 383             | ((front_porch & 0xff) << 16)
 384             | ((pulse_width & 0x3f) << 10);
 385         lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
 386 }
 387
 388 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
 389 {
 390         u32 reg;
 391         u32 reg_int;
 392
 393         reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
 394                                                 LCD_MONO_8BIT_MODE |
 395                                                 LCD_MONOCHROME_MODE);
 396
 397         switch (cfg->p_disp_panel->panel_shade) {
 398         case MONOCHROME:
 399                 reg |= LCD_MONOCHROME_MODE;
 400                 if (cfg->mono_8bit_mode)
 401                         reg |= LCD_MONO_8BIT_MODE;
 402                 break;
 403         case COLOR_ACTIVE:
 404                 reg |= LCD_TFT_MODE;
 405                 if (cfg->tft_alt_mode)
 406                         reg |= LCD_TFT_ALT_ENABLE;
 407                 break;
 408
 409         case COLOR_PASSIVE:
 410                 if (cfg->stn_565_mode)
 411                         reg |= LCD_STN_565_ENABLE;
 412                 break;
 413
 414         default:
 415                 return -EINVAL;
 416         }
 417
 418         /* enable additional interrupts here */
 419         if (lcd_revision == LCD_VERSION_1) {
 420                 reg |= LCD_V1_UNDERFLOW_INT_ENA;
 421         } else {
 422                 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
 423                         LCD_V2_UNDERFLOW_INT_ENA;
 424                 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
 425         }
 426
 427         lcdc_write(reg, LCD_RASTER_CTRL_REG);
 428
 429         reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
 430
 431         if (cfg->sync_ctrl)
 432                 reg |= LCD_SYNC_CTRL;
 433         else
 434                 reg &= ~LCD_SYNC_CTRL;
 435
 436         if (cfg->sync_edge)
 437                 reg |= LCD_SYNC_EDGE;
 438         else
 439                 reg &= ~LCD_SYNC_EDGE;
 440
 441         if (cfg->invert_line_clock)
 442                 reg |= LCD_INVERT_LINE_CLOCK;
 443         else
 444                 reg &= ~LCD_INVERT_LINE_CLOCK;
 445
 446         if (cfg->invert_frm_clock)
 447                 reg |= LCD_INVERT_FRAME_CLOCK;
 448         else
 449                 reg &= ~LCD_INVERT_FRAME_CLOCK;
 450
 451         lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
 452
 453         return 0;
 454 }
 455
 456 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
 457                 u32 bpp, u32 raster_order)
 458 {
 459         u32 reg;
 460
 461         /* Set the Panel Width */
 462         /* Pixels per line = (PPL + 1)*16 */
 463         /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
 464         width &= 0x3f0;
 465         reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
 466         reg &= 0xfffffc00;
 467         reg |= ((width >> 4) - 1) << 4;
 468         lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
 469
 470         /* Set the Panel Height */
 471         reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
 472         reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
 473         lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
 474
 475         /* Set the Raster Order of the Frame Buffer */
 476         reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
 477         if (raster_order)
 478                 reg |= LCD_RASTER_ORDER;
 479         lcdc_write(reg, LCD_RASTER_CTRL_REG);
 480
 481         switch (bpp) {
 482         case 1:
 483         case 2:
 484         case 4:
 485         case 16:
 486                 par->palette_sz = 16 * 2;
 487                 break;
 488
 489         case 8:
 490                 par->palette_sz = 256 * 2;
 491                 break;
 492
 493         default:
 494                 return -EINVAL;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
 501                               unsigned blue, unsigned transp,
 502                               struct fb_info *info)
 503 {
 504         struct da8xx_fb_par *par = info->par;
 505         unsigned short *palette = (unsigned short *) par->v_palette_base;
 506         u_short pal;
 507         int update_hw = 0;
 508
 509         if (regno > 255)
 510                 return 1;
 511
 512         if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
 513                 return 1;
 514
 515         if (info->var.bits_per_pixel == 8) {
 516                 red >>= 4;
 517                 green >>= 8;
 518                 blue >>= 12;
 519
 520                 pal = (red & 0x0f00);
 521                 pal |= (green & 0x00f0);
 522                 pal |= (blue & 0x000f);
 523
 524                 if (palette[regno] != pal) {
 525                         update_hw = 1;
 526                         palette[regno] = pal;
 527                 }
 528         } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
 529                 red >>= (16 - info->var.red.length);
 530                 red <<= info->var.red.offset;
 531
 532                 green >>= (16 - info->var.green.length);
 533                 green <<= info->var.green.offset;
 534
 535                 blue >>= (16 - info->var.blue.length);
 536                 blue <<= info->var.blue.offset;
 537
 538                 par->pseudo_palette[regno] = red | green | blue;
 539
 540                 if (palette[0] != 0x4000) {
 541                         update_hw = 1;
 542                         palette[0] = 0x4000;
 543                 }
 544         }
 545
 546         /* Update the palette in the h/w as needed. */
 547         if (update_hw)
 548                 lcd_blit(LOAD_PALETTE, par);
 549
 550         return 0;
 551 }
 552
 553 static void lcd_reset(struct da8xx_fb_par *par)
 554 {
 555         /* Disable the Raster if previously Enabled */
 556         lcd_disable_raster();
 557
 558         /* DMA has to be disabled */
 559         lcdc_write(0, LCD_DMA_CTRL_REG);
 560         lcdc_write(0, LCD_RASTER_CTRL_REG);
 561
 562         if (lcd_revision == LCD_VERSION_2)
 563                 lcdc_write(0, LCD_INT_ENABLE_SET_REG);
 564 }
 565
 566 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
 567 {
 568         unsigned int lcd_clk, div;
 569
 570         lcd_clk = clk_get_rate(par->lcdc_clk);
 571         div = lcd_clk / par->pxl_clk;
 572
 573         /* Configure the LCD clock divisor. */
 574         lcdc_write(LCD_CLK_DIVISOR(div) |
 575                         (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
 576
 577         if (lcd_revision == LCD_VERSION_2)
 578                 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
 579                                 LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
 580
 581 }
 582
 583 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
 584                 struct da8xx_panel *panel)
 585 {
 586         u32 bpp;
 587         int ret = 0;
 588
 589         lcd_reset(par);
 590
 591         /* Calculate the divider */
 592         lcd_calc_clk_divider(par);
 593
 594         if (panel->invert_pxl_clk)
 595                 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
 596                         LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
 597         else
 598                 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
 599                         ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
 600
 601         /* Configure the DMA burst size. */
 602         ret = lcd_cfg_dma(cfg->dma_burst_sz);
 603         if (ret < 0)
 604                 return ret;
 605
 606         /* Configure the AC bias properties. */
 607         lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
 608
 609         /* Configure the vertical and horizontal sync properties. */
 610         lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
 611         lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
 612
 613         /* Configure for disply */
 614         ret = lcd_cfg_display(cfg);
 615         if (ret < 0)
 616                 return ret;
 617
 618         if (QVGA != cfg->p_disp_panel->panel_type)
 619                 return -EINVAL;
 620
 621         if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
 622             cfg->bpp >= cfg->p_disp_panel->min_bpp)
 623                 bpp = cfg->bpp;
 624         else
 625                 bpp = cfg->p_disp_panel->max_bpp;
 626         if (bpp == 12)
 627                 bpp = 16;
 628         ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
 629                                 (unsigned int)panel->height, bpp,
 630                                 cfg->raster_order);
 631         if (ret < 0)
 632                 return ret;
 633
 634         /* Configure FDD */
 635         lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
 636                        (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
 637
 638         return 0;
 639 }
 640
 641 /* IRQ handler for version 2 of LCDC */
 642 static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
 643 {
 644         struct da8xx_fb_par *par = arg;
 645         u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
 646         u32 reg_int;
 647
 648         if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
 649                 lcd_disable_raster();
 650                 lcdc_write(stat, LCD_MASKED_STAT_REG);
 651                 lcd_enable_raster();
 652         } else if (stat & LCD_PL_LOAD_DONE) {
 653                 /*
 654                  * Must disable raster before changing state of any control bit.
 655                  * And also must be disabled before clearing the PL loading
 656                  * interrupt via the following write to the status register. If
 657                  * this is done after then one gets multiple PL done interrupts.
 658                  */
 659                 lcd_disable_raster();
 660
 661                 lcdc_write(stat, LCD_MASKED_STAT_REG);
 662
 663                 /* Disable PL completion inerrupt */
 664                 reg_int = lcdc_read(LCD_INT_ENABLE_CLR_REG) |
 665                        (LCD_V2_PL_INT_ENA);
 666                 lcdc_write(reg_int, LCD_INT_ENABLE_CLR_REG);
 667
 668                 /* Setup and start data loading mode */
 669                 lcd_blit(LOAD_DATA, par);
 670         } else {
 671                 lcdc_write(stat, LCD_MASKED_STAT_REG);
 672
 673                 if (stat & LCD_END_OF_FRAME0) {
 674                         lcdc_write(par->dma_start,
 675                                    LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
 676                         lcdc_write(par->dma_end,
 677                                    LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
 678                         par->vsync_flag = 1;
 679                         wake_up_interruptible(&par->vsync_wait);
 680                 }
 681
 682                 if (stat & LCD_END_OF_FRAME1) {
 683                         lcdc_write(par->dma_start,
 684                                    LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
 685                         lcdc_write(par->dma_end,
 686                                    LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
 687                         par->vsync_flag = 1;
 688                         wake_up_interruptible(&par->vsync_wait);
 689                 }
 690         }
 691
 692         lcdc_write(0, LCD_END_OF_INT_IND_REG);
 693         return IRQ_HANDLED;
 694 }
 695
 696 /* IRQ handler for version 1 LCDC */
 697 static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
 698 {
 699         struct da8xx_fb_par *par = arg;
 700         u32 stat = lcdc_read(LCD_STAT_REG);
 701         u32 reg_ras;
 702
 703         if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
 704                 lcd_disable_raster();
 705                 lcdc_write(stat, LCD_STAT_REG);
 706                 lcd_enable_raster();
 707         } else if (stat & LCD_PL_LOAD_DONE) {
 708                 /*
 709                  * Must disable raster before changing state of any control bit.
 710                  * And also must be disabled before clearing the PL loading
 711                  * interrupt via the following write to the status register. If
 712                  * this is done after then one gets multiple PL done interrupts.
 713                  */
 714                 lcd_disable_raster();
 715
 716                 lcdc_write(stat, LCD_STAT_REG);
 717
 718                 /* Disable PL completion inerrupt */
 719                 reg_ras  = lcdc_read(LCD_RASTER_CTRL_REG);
 720                 reg_ras &= ~LCD_V1_PL_INT_ENA;
 721                 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
 722
 723                 /* Setup and start data loading mode */
 724                 lcd_blit(LOAD_DATA, par);
 725         } else {
 726                 lcdc_write(stat, LCD_STAT_REG);
 727
 728                 if (stat & LCD_END_OF_FRAME0) {
 729                         lcdc_write(par->dma_start,
 730                                    LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
 731                         lcdc_write(par->dma_end,
 732                                    LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
 733                         par->vsync_flag = 1;
 734                         wake_up_interruptible(&par->vsync_wait);
 735                 }
 736
 737                 if (stat & LCD_END_OF_FRAME1) {
 738                         lcdc_write(par->dma_start,
 739                                    LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
 740                         lcdc_write(par->dma_end,
 741                                    LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
 742                         par->vsync_flag = 1;
 743                         wake_up_interruptible(&par->vsync_wait);
 744                 }
 745         }
 746
 747         return IRQ_HANDLED;
 748 }
 749
 750 static int fb_check_var(struct fb_var_screeninfo *var,
 751                         struct fb_info *info)
 752 {
 753         int err = 0;
 754
 755         switch (var->bits_per_pixel) {
 756         case 1:
 757         case 8:
 758                 var->red.offset = 0;
 759                 var->red.length = 8;
 760                 var->green.offset = 0;
 761                 var->green.length = 8;
 762                 var->blue.offset = 0;
 763                 var->blue.length = 8;
 764                 var->transp.offset = 0;
 765                 var->transp.length = 0;
 766                 break;
 767         case 4:
 768                 var->red.offset = 0;
 769                 var->red.length = 4;
 770                 var->green.offset = 0;
 771                 var->green.length = 4;
 772                 var->blue.offset = 0;
 773                 var->blue.length = 4;
 774                 var->transp.offset = 0;
 775                 var->transp.length = 0;
 776                 break;
 777         case 16:                /* RGB 565 */
 778                 var->red.offset = 11;
 779                 var->red.length = 5;
 780                 var->green.offset = 5;
 781                 var->green.length = 6;
 782                 var->blue.offset = 0;
 783                 var->blue.length = 5;
 784                 var->transp.offset = 0;
 785                 var->transp.length = 0;
 786                 break;
 787         default:
 788                 err = -EINVAL;
 789         }
 790
 791         var->red.msb_right = 0;
 792         var->green.msb_right = 0;
 793         var->blue.msb_right = 0;
 794         var->transp.msb_right = 0;
 795         return err;
 796 }
 797
 798 #ifdef CONFIG_CPU_FREQ
 799 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
 800                                      unsigned long val, void *data)
 801 {
 802         struct da8xx_fb_par *par;
 803
 804         par = container_of(nb, struct da8xx_fb_par, freq_transition);
 805         if (val == CPUFREQ_PRECHANGE) {
 806                 lcd_disable_raster();
 807         } else if (val == CPUFREQ_POSTCHANGE) {
 808                 lcd_calc_clk_divider(par);
 809                 lcd_enable_raster();
 810         }
 811
 812         return 0;
 813 }
 814
 815 static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
 816 {
 817         par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
 818
 819         return cpufreq_register_notifier(&par->freq_transition,
 820                                          CPUFREQ_TRANSITION_NOTIFIER);
 821 }
 822
 823 static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
 824 {
 825         cpufreq_unregister_notifier(&par->freq_transition,
 826                                     CPUFREQ_TRANSITION_NOTIFIER);
 827 }
 828 #endif
 829
 830 static int __devexit fb_remove(struct platform_device *dev)
 831 {
 832         struct fb_info *info = dev_get_drvdata(&dev->dev);
 833
 834         if (info) {
 835                 struct da8xx_fb_par *par = info->par;
 836
 837 #ifdef CONFIG_CPU_FREQ
 838                 lcd_da8xx_cpufreq_deregister(par);
 839 #endif
 840                 if (par->panel_power_ctrl)
 841                         par->panel_power_ctrl(0);
 842
 843                 lcd_disable_raster();
 844                 lcdc_write(0, LCD_RASTER_CTRL_REG);
 845
 846                 /* disable DMA  */
 847                 lcdc_write(0, LCD_DMA_CTRL_REG);
 848
 849                 unregister_framebuffer(info);
 850                 fb_dealloc_cmap(&info->cmap);
 851                 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
 852                                   par->p_palette_base);
 853                 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
 854                                   par->vram_phys);
 855                 free_irq(par->irq, par);
 856                 clk_disable(par->lcdc_clk);
 857                 clk_put(par->lcdc_clk);
 858                 framebuffer_release(info);
 859                 iounmap((void __iomem *)da8xx_fb_reg_base);
 860                 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
 861
 862         }
 863         return 0;
 864 }
 865
 866 /*
 867  * Function to wait for vertical sync which for this LCD peripheral
 868  * translates into waiting for the current raster frame to complete.
 869  */
 870 static int fb_wait_for_vsync(struct fb_info *info)
 871 {
 872         struct da8xx_fb_par *par = info->par;
 873         int ret;
 874
 875         /*
 876          * Set flag to 0 and wait for isr to set to 1. It would seem there is a
 877          * race condition here where the ISR could have occurred just before or
 878          * just after this set. But since we are just coarsely waiting for
 879          * a frame to complete then that's OK. i.e. if the frame completed
 880          * just before this code executed then we have to wait another full
 881          * frame time but there is no way to avoid such a situation. On the
 882          * other hand if the frame completed just after then we don't need
 883          * to wait long at all. Either way we are guaranteed to return to the
 884          * user immediately after a frame completion which is all that is
 885          * required.
 886          */
 887         par->vsync_flag = 0;
 888         ret = wait_event_interruptible_timeout(par->vsync_wait,
 889                                                par->vsync_flag != 0,
 890                                                par->vsync_timeout);
 891         if (ret < 0)
 892                 return ret;
 893         if (ret == 0)
 894                 return -ETIMEDOUT;
 895
 896         return 0;
 897 }
 898
 899 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
 900                           unsigned long arg)
 901 {
 902         struct lcd_sync_arg sync_arg;
 903
 904         switch (cmd) {
 905         case FBIOGET_CONTRAST:
 906         case FBIOPUT_CONTRAST:
 907         case FBIGET_BRIGHTNESS:
 908         case FBIPUT_BRIGHTNESS:
 909         case FBIGET_COLOR:
 910         case FBIPUT_COLOR:
 911                 return -ENOTTY;
 912         case FBIPUT_HSYNC:
 913                 if (copy_from_user(&sync_arg, (char *)arg,
 914                                 sizeof(struct lcd_sync_arg)))
 915                         return -EFAULT;
 916                 lcd_cfg_horizontal_sync(sync_arg.back_porch,
 917                                         sync_arg.pulse_width,
 918                                         sync_arg.front_porch);
 919                 break;
 920         case FBIPUT_VSYNC:
 921                 if (copy_from_user(&sync_arg, (char *)arg,
 922                                 sizeof(struct lcd_sync_arg)))
 923                         return -EFAULT;
 924                 lcd_cfg_vertical_sync(sync_arg.back_porch,
 925                                         sync_arg.pulse_width,
 926                                         sync_arg.front_porch);
 927                 break;
 928         case FBIO_WAITFORVSYNC:
 929                 return fb_wait_for_vsync(info);
 930         default:
 931                 return -EINVAL;
 932         }
 933         return 0;
 934 }
 935
 936 static int cfb_blank(int blank, struct fb_info *info)
 937 {
 938         struct da8xx_fb_par *par = info->par;
 939         int ret = 0;
 940
 941         if (par->blank == blank)
 942                 return 0;
 943
 944         par->blank = blank;
 945         switch (blank) {
 946         case FB_BLANK_UNBLANK:
 947                 if (par->panel_power_ctrl)
 948                         par->panel_power_ctrl(1);
 949
 950                 lcd_enable_raster();
 951                 break;
 952         case FB_BLANK_POWERDOWN:
 953                 if (par->panel_power_ctrl)
 954                         par->panel_power_ctrl(0);
 955
 956                 lcd_disable_raster();
 957                 break;
 958         default:
 959                 ret = -EINVAL;
 960         }
 961
 962         return ret;
 963 }
 964
 965 /*
 966  * Set new x,y offsets in the virtual display for the visible area and switch
 967  * to the new mode.
 968  */
 969 static int da8xx_pan_display(struct fb_var_screeninfo *var,
 970                              struct fb_info *fbi)
 971 {
 972         int ret = 0;
 973         struct fb_var_screeninfo new_var;
 974         struct da8xx_fb_par         *par = fbi->par;
 975         struct fb_fix_screeninfo    *fix = &fbi->fix;
 976         unsigned int end;
 977         unsigned int start;
 978
 979         if (var->xoffset != fbi->var.xoffset ||
 980                         var->yoffset != fbi->var.yoffset) {
 981                 memcpy(&new_var, &fbi->var, sizeof(new_var));
 982                 new_var.xoffset = var->xoffset;
 983                 new_var.yoffset = var->yoffset;
 984                 if (fb_check_var(&new_var, fbi))
 985                         ret = -EINVAL;
 986                 else {
 987                         memcpy(&fbi->var, &new_var, sizeof(new_var));
 988
 989                         start   = fix->smem_start +
 990                                 new_var.yoffset * fix->line_length +
 991                                 new_var.xoffset * fbi->var.bits_per_pixel / 8;
 992                         end     = start + fbi->var.yres * fix->line_length - 1;
 993                         par->dma_start  = start;
 994                         par->dma_end    = end;
 995                 }
 996         }
 997
 998         return ret;
 999 }
1000
1001 static struct fb_ops da8xx_fb_ops = {
1002         .owner = THIS_MODULE,
1003         .fb_check_var = fb_check_var,
1004         .fb_setcolreg = fb_setcolreg,
1005         .fb_pan_display = da8xx_pan_display,
1006         .fb_ioctl = fb_ioctl,
1007         .fb_fillrect = cfb_fillrect,
1008         .fb_copyarea = cfb_copyarea,
1009         .fb_imageblit = cfb_imageblit,
1010         .fb_blank = cfb_blank,
1011 };
1012
1013 static int __devinit fb_probe(struct platform_device *device)
1014 {
1015         struct da8xx_lcdc_platform_data *fb_pdata =
1016                                                 device->dev.platform_data;
1017         struct lcd_ctrl_config *lcd_cfg;
1018         struct da8xx_panel *lcdc_info;
1019         struct fb_info *da8xx_fb_info;
1020         struct clk *fb_clk = NULL;
1021         struct da8xx_fb_par *par;
1022         resource_size_t len;
1023         int ret, i;
1024
1025         if (fb_pdata == NULL) {
1026                 dev_err(&device->dev, "Can not get platform data\n");
1027                 return -ENOENT;
1028         }
1029
1030         lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
1031         if (!lcdc_regs) {
1032                 dev_err(&device->dev,
1033                         "Can not get memory resource for LCD controller\n");
1034                 return -ENOENT;
1035         }
1036
1037         len = resource_size(lcdc_regs);
1038
1039         lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
1040         if (!lcdc_regs)
1041                 return -EBUSY;
1042
1043         da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
1044         if (!da8xx_fb_reg_base) {
1045                 ret = -EBUSY;
1046                 goto err_request_mem;
1047         }
1048
1049         fb_clk = clk_get(&device->dev, NULL);
1050         if (IS_ERR(fb_clk)) {
1051                 dev_err(&device->dev, "Can not get device clock\n");
1052                 ret = -ENODEV;
1053                 goto err_ioremap;
1054         }
1055         ret = clk_enable(fb_clk);
1056         if (ret)
1057                 goto err_clk_put;
1058
1059         /* Determine LCD IP Version */
1060         switch (lcdc_read(LCD_PID_REG)) {
1061         case 0x4C100102:
1062                 lcd_revision = LCD_VERSION_1;
1063                 break;
1064         case 0x4F200800:
1065                 lcd_revision = LCD_VERSION_2;
1066                 break;
1067         default:
1068                 dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
1069                                 "defaulting to LCD revision 1\n",
1070                                 lcdc_read(LCD_PID_REG));
1071                 lcd_revision = LCD_VERSION_1;
1072                 break;
1073         }
1074
1075         for (i = 0, lcdc_info = known_lcd_panels;
1076                 i < ARRAY_SIZE(known_lcd_panels);
1077                 i++, lcdc_info++) {
1078                 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
1079                         break;
1080         }
1081
1082         if (i == ARRAY_SIZE(known_lcd_panels)) {
1083                 dev_err(&device->dev, "GLCD: No valid panel found\n");
1084                 ret = -ENODEV;
1085                 goto err_clk_disable;
1086         } else
1087                 dev_info(&device->dev, "GLCD: Found %s panel\n",
1088                                         fb_pdata->type);
1089
1090         lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
1091
1092         da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
1093                                         &device->dev);
1094         if (!da8xx_fb_info) {
1095                 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
1096                 ret = -ENOMEM;
1097                 goto err_clk_disable;
1098         }
1099
1100         par = da8xx_fb_info->par;
1101         par->lcdc_clk = fb_clk;
1102         par->pxl_clk = lcdc_info->pxl_clk;
1103         if (fb_pdata->panel_power_ctrl) {
1104                 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
1105                 par->panel_power_ctrl(1);
1106         }
1107
1108         if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
1109                 dev_err(&device->dev, "lcd_init failed\n");
1110                 ret = -EFAULT;
1111                 goto err_release_fb;
1112         }
1113
1114         /* allocate frame buffer */
1115         par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp;
1116         par->vram_size = PAGE_ALIGN(par->vram_size/8);
1117         par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
1118
1119         par->vram_virt = dma_alloc_coherent(NULL,
1120                                             par->vram_size,
1121                                             (resource_size_t *) &par->vram_phys,
1122                                             GFP_KERNEL | GFP_DMA);
1123         if (!par->vram_virt) {
1124                 dev_err(&device->dev,
1125                         "GLCD: kmalloc for frame buffer failed\n");
1126                 ret = -EINVAL;
1127                 goto err_release_fb;
1128         }
1129
1130         da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1131         da8xx_fb_fix.smem_start    = par->vram_phys;
1132         da8xx_fb_fix.smem_len      = par->vram_size;
1133         da8xx_fb_fix.line_length   = (lcdc_info->width * lcd_cfg->bpp) / 8;
1134
1135         par->dma_start = par->vram_phys;
1136         par->dma_end   = par->dma_start + lcdc_info->height *
1137                 da8xx_fb_fix.line_length - 1;
1138
1139         /* allocate palette buffer */
1140         par->v_palette_base = dma_alloc_coherent(NULL,
1141                                                PALETTE_SIZE,
1142                                                (resource_size_t *)
1143                                                &par->p_palette_base,
1144                                                GFP_KERNEL | GFP_DMA);
1145         if (!par->v_palette_base) {
1146                 dev_err(&device->dev,
1147                         "GLCD: kmalloc for palette buffer failed\n");
1148                 ret = -EINVAL;
1149                 goto err_release_fb_mem;
1150         }
1151         memset(par->v_palette_base, 0, PALETTE_SIZE);
1152
1153         par->irq = platform_get_irq(device, 0);
1154         if (par->irq < 0) {
1155                 ret = -ENOENT;
1156                 goto err_release_pl_mem;
1157         }
1158
1159         /* Initialize par */
1160         da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
1161
1162         da8xx_fb_var.xres = lcdc_info->width;
1163         da8xx_fb_var.xres_virtual = lcdc_info->width;
1164
1165         da8xx_fb_var.yres         = lcdc_info->height;
1166         da8xx_fb_var.yres_virtual = lcdc_info->height * LCD_NUM_BUFFERS;
1167
1168         da8xx_fb_var.grayscale =
1169             lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
1170         da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1171
1172         da8xx_fb_var.hsync_len = lcdc_info->hsw;
1173         da8xx_fb_var.vsync_len = lcdc_info->vsw;
1174
1175         /* Initialize fbinfo */
1176         da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1177         da8xx_fb_info->fix = da8xx_fb_fix;
1178         da8xx_fb_info->var = da8xx_fb_var;
1179         da8xx_fb_info->fbops = &da8xx_fb_ops;
1180         da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1181         da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1182                                 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1183
1184         ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1185         if (ret)
1186                 goto err_release_pl_mem;
1187         da8xx_fb_info->cmap.len = par->palette_sz;
1188
1189         /* initialize var_screeninfo */
1190         da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1191         fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1192
1193         dev_set_drvdata(&device->dev, da8xx_fb_info);
1194
1195         /* initialize the vsync wait queue */
1196         init_waitqueue_head(&par->vsync_wait);
1197         par->vsync_timeout = HZ / 5;
1198
1199         /* Register the Frame Buffer  */
1200         if (register_framebuffer(da8xx_fb_info) < 0) {
1201                 dev_err(&device->dev,
1202                         "GLCD: Frame Buffer Registration Failed!\n");
1203                 ret = -EINVAL;
1204                 goto err_dealloc_cmap;
1205         }
1206
1207 #ifdef CONFIG_CPU_FREQ
1208         ret = lcd_da8xx_cpufreq_register(par);
1209         if (ret) {
1210                 dev_err(&device->dev, "failed to register cpufreq\n");
1211                 goto err_cpu_freq;
1212         }
1213 #endif
1214
1215         if (lcd_revision == LCD_VERSION_1)
1216                 lcdc_irq_handler = lcdc_irq_handler_rev01;
1217         else
1218                 lcdc_irq_handler = lcdc_irq_handler_rev02;
1219
1220         ret = request_irq(par->irq, lcdc_irq_handler, 0,
1221                         DRIVER_NAME, par);
1222         if (ret)
1223                 goto irq_freq;
1224         return 0;
1225
1226 irq_freq:
1227 #ifdef CONFIG_CPU_FREQ
1228         lcd_da8xx_cpufreq_deregister(par);
1229 #endif
1230 err_cpu_freq:
1231         unregister_framebuffer(da8xx_fb_info);
1232
1233 err_dealloc_cmap:
1234         fb_dealloc_cmap(&da8xx_fb_info->cmap);
1235
1236 err_release_pl_mem:
1237         dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1238                           par->p_palette_base);
1239
1240 err_release_fb_mem:
1241         dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
1242
1243 err_release_fb:
1244         framebuffer_release(da8xx_fb_info);
1245
1246 err_clk_disable:
1247         clk_disable(fb_clk);
1248
1249 err_clk_put:
1250         clk_put(fb_clk);
1251
1252 err_ioremap:
1253         iounmap((void __iomem *)da8xx_fb_reg_base);
1254
1255 err_request_mem:
1256         release_mem_region(lcdc_regs->start, len);
1257
1258         return ret;
1259 }
1260
1261 #ifdef CONFIG_PM
1262 static int fb_suspend(struct platform_device *dev, pm_message_t state)
1263 {
1264         struct fb_info *info = platform_get_drvdata(dev);
1265         struct da8xx_fb_par *par = info->par;
1266
1267         console_lock();
1268         if (par->panel_power_ctrl)
1269                 par->panel_power_ctrl(0);
1270
1271         fb_set_suspend(info, 1);
1272         lcd_disable_raster();
1273         clk_disable(par->lcdc_clk);
1274         console_unlock();
1275
1276         return 0;
1277 }
1278 static int fb_resume(struct platform_device *dev)
1279 {
1280         struct fb_info *info = platform_get_drvdata(dev);
1281         struct da8xx_fb_par *par = info->par;
1282
1283         console_lock();
1284         if (par->panel_power_ctrl)
1285                 par->panel_power_ctrl(1);
1286
1287         clk_enable(par->lcdc_clk);
1288         lcd_enable_raster();
1289         fb_set_suspend(info, 0);
1290         console_unlock();
1291
1292         return 0;
1293 }
1294 #else
1295 #define fb_suspend NULL
1296 #define fb_resume NULL
1297 #endif
1298
1299 static struct platform_driver da8xx_fb_driver = {
1300         .probe = fb_probe,
1301         .remove = __devexit_p(fb_remove),
1302         .suspend = fb_suspend,
1303         .resume = fb_resume,
1304         .driver = {
1305                    .name = DRIVER_NAME,
1306                    .owner = THIS_MODULE,
1307                    },
1308 };
1309
1310 static int __init da8xx_fb_init(void)
1311 {
1312         return platform_driver_register(&da8xx_fb_driver);
1313 }
1314
1315 static void __exit da8xx_fb_cleanup(void)
1316 {
1317         platform_driver_unregister(&da8xx_fb_driver);
1318 }
1319
1320 module_init(da8xx_fb_init);
1321 module_exit(da8xx_fb_cleanup);
1322
1323 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1324 MODULE_AUTHOR("Texas Instruments");
1325 MODULE_LICENSE("GPL");