drivers/video/bf54x-lq043fb.c

   1 /*
   2  * File:         drivers/video/bf54x-lq043.c
   3  * Based on:
   4  * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
   5  *
   6  * Created:
   7  * Description:  ADSP-BF54x Framebufer driver
   8  *
   9  *
  10  * Modified:
  11  *               Copyright 2007-2008 Analog Devices Inc.
  12  *
  13  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, see the file COPYING, or write
  27  * to the Free Software Foundation, Inc.,
  28  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/errno.h>
  34 #include <linux/string.h>
  35 #include <linux/mm.h>
  36 #include <linux/tty.h>
  37 #include <linux/slab.h>
  38 #include <linux/delay.h>
  39 #include <linux/fb.h>
  40 #include <linux/ioport.h>
  41 #include <linux/init.h>
  42 #include <linux/types.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/sched.h>
  45 #include <linux/timer.h>
  46 #include <linux/device.h>
  47 #include <linux/backlight.h>
  48 #include <linux/lcd.h>
  49 #include <linux/spinlock.h>
  50 #include <linux/dma-mapping.h>
  51 #include <linux/platform_device.h>
  52
  53 #include <asm/blackfin.h>
  54 #include <asm/irq.h>
  55 #include <asm/dpmc.h>
  56 #include <asm/dma-mapping.h>
  57 #include <asm/dma.h>
  58 #include <asm/gpio.h>
  59 #include <asm/portmux.h>
  60
  61 #include <mach/bf54x-lq043.h>
  62
  63 #define NO_BL_SUPPORT
  64
  65 #define DRIVER_NAME "bf54x-lq043"
  66 static char driver_name[] = DRIVER_NAME;
  67
  68 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
  69
  70 #define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, \
  71  P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, \
  72  P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, 0}
  73
  74 #define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0}
  75
  76 struct bfin_bf54xfb_info {
  77         struct fb_info *fb;
  78         struct device *dev;
  79
  80         struct bfin_bf54xfb_mach_info *mach_info;
  81
  82         unsigned char *fb_buffer;       /* RGB Buffer */
  83
  84         dma_addr_t dma_handle;
  85         int lq043_open_cnt;
  86         int irq;
  87         spinlock_t lock;        /* lock */
  88 };
  89
  90 static int nocursor;
  91 module_param(nocursor, int, 0644);
  92 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  93
  94 static int outp_rgb666;
  95 module_param(outp_rgb666, int, 0);
  96 MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
  97
  98 #define LCD_X_RES               480     /*Horizontal Resolution */
  99 #define LCD_Y_RES               272     /* Vertical Resolution */
 100
 101 #define LCD_BPP                 24      /* Bit Per Pixel */
 102 #define DMA_BUS_SIZE            32
 103
 104 /*      -- Horizontal synchronizing --
 105  *
 106  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
 107  * (LCY-W-06602A Page 9 of 22)
 108  *
 109  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
 110  *
 111  * Period               TH - 525 - Clock
 112  * Pulse width          THp - 41 - Clock
 113  * Horizontal period    THd - 480 - Clock
 114  * Back porch           THb - 2 - Clock
 115  * Front porch          THf - 2 - Clock
 116  *
 117  * -- Vertical synchronizing --
 118  * Period               TV - 286 - Line
 119  * Pulse width          TVp - 10 - Line
 120  * Vertical period      TVd - 272 - Line
 121  * Back porch           TVb - 2 - Line
 122  * Front porch          TVf - 2 - Line
 123  */
 124
 125 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
 126
 127 /* # active data to transfer after Horizontal Delay clock */
 128 #define EPPI_HCOUNT             LCD_X_RES
 129
 130 /* # active lines to transfer after Vertical Delay clock */
 131 #define EPPI_VCOUNT             LCD_Y_RES
 132
 133 /* Samples per Line = 480 (active data) + 45 (padding) */
 134 #define EPPI_LINE               525
 135
 136 /* Lines per Frame = 272 (active data) + 14 (padding) */
 137 #define EPPI_FRAME              286
 138
 139 /* FS1 (Hsync) Width (Typical)*/
 140 #define EPPI_FS1W_HBL           41
 141
 142 /* FS1 (Hsync) Period (Typical) */
 143 #define EPPI_FS1P_AVPL          EPPI_LINE
 144
 145 /* Horizontal Delay clock after assertion of Hsync (Typical) */
 146 #define EPPI_HDELAY             43
 147
 148 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
 149 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
 150
 151  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
 152 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
 153
 154 /* Vertical Delay after assertion of Vsync (2 Lines) */
 155 #define EPPI_VDELAY             12
 156
 157 #define EPPI_CLIP               0xFF00FF00
 158
 159 /* EPPI Control register configuration value for RGB out
 160  * - EPPI as Output
 161  * GP 2 frame sync mode,
 162  * Internal Clock generation disabled, Internal FS generation enabled,
 163  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
 164  * FS1 & FS2 are active high,
 165  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 166  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
 167  * Swapping Enabled,
 168  * One (DMA) Channel Mode,
 169  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 170  * Regular watermark - when FIFO is 100% full,
 171  * Urgent watermark - when FIFO is 75% full
 172  */
 173
 174 #define EPPI_CONTROL            (0x20136E2E | SWAPEN)
 175
 176 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
 177 {
 178         u32 sclk = get_sclk();
 179
 180         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
 181
 182         return (((sclk / target_ppi_clk) / 2) - 1);
 183 }
 184
 185 static void config_ppi(struct bfin_bf54xfb_info *fbi)
 186 {
 187
 188         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
 189
 190         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
 191         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
 192         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
 193         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
 194         bfin_write_EPPI0_CLIP(EPPI_CLIP);
 195
 196         bfin_write_EPPI0_FRAME(EPPI_FRAME);
 197         bfin_write_EPPI0_LINE(EPPI_LINE);
 198
 199         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
 200         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
 201         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
 202         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
 203
 204         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
 205
 206 /*
 207  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 208  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 209  */
 210         if (outp_rgb666)
 211                 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
 212                                          RGB_FMT_EN);
 213         else
 214                 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
 215                                          ~RGB_FMT_EN);
 216
 217
 218 }
 219
 220 static int config_dma(struct bfin_bf54xfb_info *fbi)
 221 {
 222
 223         set_dma_config(CH_EPPI0,
 224                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
 225                                            INTR_DISABLE, DIMENSION_2D,
 226                                            DATA_SIZE_32,
 227                                            DMA_NOSYNC_KEEP_DMA_BUF));
 228         set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
 229         set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
 230         set_dma_y_count(CH_EPPI0, LCD_Y_RES);
 231         set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
 232         set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
 233
 234         return 0;
 235 }
 236
 237 static int request_ports(struct bfin_bf54xfb_info *fbi)
 238 {
 239
 240         u16 eppi_req_18[] = EPPI0_18;
 241         u16 disp = fbi->mach_info->disp;
 242
 243         if (gpio_request(disp, DRIVER_NAME)) {
 244                 printk(KERN_ERR "Requesting GPIO %d failed\n", disp);
 245                 return -EFAULT;
 246         }
 247
 248         if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
 249                 printk(KERN_ERR "Requesting Peripherals failed\n");
 250                 gpio_free(disp);
 251                 return -EFAULT;
 252         }
 253
 254         if (!outp_rgb666) {
 255
 256                 u16 eppi_req_24[] = EPPI0_24;
 257
 258                 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
 259                         printk(KERN_ERR "Requesting Peripherals failed\n");
 260                         peripheral_free_list(eppi_req_18);
 261                         gpio_free(disp);
 262                         return -EFAULT;
 263                 }
 264         }
 265
 266         gpio_direction_output(disp, 1);
 267
 268         return 0;
 269 }
 270
 271 static void free_ports(struct bfin_bf54xfb_info *fbi)
 272 {
 273
 274         u16 eppi_req_18[] = EPPI0_18;
 275
 276         gpio_free(fbi->mach_info->disp);
 277
 278         peripheral_free_list(eppi_req_18);
 279
 280         if (!outp_rgb666) {
 281                 u16 eppi_req_24[] = EPPI0_24;
 282                 peripheral_free_list(eppi_req_24);
 283         }
 284 }
 285
 286 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
 287 {
 288         struct bfin_bf54xfb_info *fbi = info->par;
 289
 290         spin_lock(&fbi->lock);
 291         fbi->lq043_open_cnt++;
 292
 293         if (fbi->lq043_open_cnt <= 1) {
 294
 295                 bfin_write_EPPI0_CONTROL(0);
 296                 SSYNC();
 297
 298                 config_dma(fbi);
 299                 config_ppi(fbi);
 300
 301                 /* start dma */
 302                 enable_dma(CH_EPPI0);
 303                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 304         }
 305
 306         spin_unlock(&fbi->lock);
 307
 308         return 0;
 309 }
 310
 311 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
 312 {
 313         struct bfin_bf54xfb_info *fbi = info->par;
 314
 315         spin_lock(&fbi->lock);
 316
 317         fbi->lq043_open_cnt--;
 318
 319         if (fbi->lq043_open_cnt <= 0) {
 320
 321                 bfin_write_EPPI0_CONTROL(0);
 322                 SSYNC();
 323                 disable_dma(CH_EPPI0);
 324         }
 325
 326         spin_unlock(&fbi->lock);
 327
 328         return 0;
 329 }
 330
 331 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
 332                                    struct fb_info *info)
 333 {
 334
 335         switch (var->bits_per_pixel) {
 336         case 24:/* TRUECOLOUR, 16m */
 337                 var->red.offset = 16;
 338                 var->green.offset = 8;
 339                 var->blue.offset = 0;
 340                 var->red.length = var->green.length = var->blue.length = 8;
 341                 var->transp.offset = 0;
 342                 var->transp.length = 0;
 343                 var->transp.msb_right = 0;
 344                 var->red.msb_right = 0;
 345                 var->green.msb_right = 0;
 346                 var->blue.msb_right = 0;
 347                 break;
 348         default:
 349                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 350                          var->bits_per_pixel);
 351                 return -EINVAL;
 352         }
 353
 354         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 355             info->var.xres_virtual != var->xres_virtual ||
 356             info->var.yres_virtual != var->yres_virtual) {
 357                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 358                          __func__, var->xres, var->yres);
 359                 return -EINVAL;
 360         }
 361
 362         /*
 363          *  Memory limit
 364          */
 365
 366         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 367                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 368                          __func__, var->yres_virtual);
 369                 return -ENOMEM;
 370         }
 371
 372         return 0;
 373 }
 374
 375 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 376 {
 377         if (nocursor)
 378                 return 0;
 379         else
 380                 return -EINVAL; /* just to force soft_cursor() call */
 381 }
 382
 383 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
 384                                    u_int blue, u_int transp,
 385                                    struct fb_info *info)
 386 {
 387         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 388                 return -EINVAL;
 389
 390         if (info->var.grayscale) {
 391                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 392                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 393         }
 394
 395         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 396
 397                 u32 value;
 398                 /* Place color in the pseudopalette */
 399                 if (regno > 16)
 400                         return -EINVAL;
 401
 402                 red >>= (16 - info->var.red.length);
 403                 green >>= (16 - info->var.green.length);
 404                 blue >>= (16 - info->var.blue.length);
 405
 406                 value = (red << info->var.red.offset) |
 407                     (green << info->var.green.offset) |
 408                     (blue << info->var.blue.offset);
 409                 value &= 0xFFFFFF;
 410
 411                 ((u32 *) (info->pseudo_palette))[regno] = value;
 412
 413         }
 414
 415         return 0;
 416 }
 417
 418 static struct fb_ops bfin_bf54x_fb_ops = {
 419         .owner = THIS_MODULE,
 420         .fb_open = bfin_bf54x_fb_open,
 421         .fb_release = bfin_bf54x_fb_release,
 422         .fb_check_var = bfin_bf54x_fb_check_var,
 423         .fb_fillrect = cfb_fillrect,
 424         .fb_copyarea = cfb_copyarea,
 425         .fb_imageblit = cfb_imageblit,
 426         .fb_cursor = bfin_bf54x_fb_cursor,
 427         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
 428 };
 429
 430 #ifndef NO_BL_SUPPORT
 431 static int bl_get_brightness(struct backlight_device *bd)
 432 {
 433         return 0;
 434 }
 435
 436 static const struct backlight_ops bfin_lq043fb_bl_ops = {
 437         .get_brightness = bl_get_brightness,
 438 };
 439
 440 static struct backlight_device *bl_dev;
 441
 442 static int bfin_lcd_get_power(struct lcd_device *dev)
 443 {
 444         return 0;
 445 }
 446
 447 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 448 {
 449         return 0;
 450 }
 451
 452 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 453 {
 454         return 0;
 455 }
 456
 457 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 458 {
 459
 460         return 0;
 461 }
 462
 463 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
 464 {
 465         if (!fi || (fi == &bfin_bf54x_fb))
 466                 return 1;
 467         return 0;
 468 }
 469
 470 static struct lcd_ops bfin_lcd_ops = {
 471         .get_power = bfin_lcd_get_power,
 472         .set_power = bfin_lcd_set_power,
 473         .get_contrast = bfin_lcd_get_contrast,
 474         .set_contrast = bfin_lcd_set_contrast,
 475         .check_fb = bfin_lcd_check_fb,
 476 };
 477
 478 static struct lcd_device *lcd_dev;
 479 #endif
 480
 481 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
 482 {
 483         /*struct bfin_bf54xfb_info *info = dev_id;*/
 484
 485         u16 status = bfin_read_EPPI0_STATUS();
 486
 487         bfin_write_EPPI0_STATUS(0xFFFF);
 488
 489         if (status) {
 490                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 491                 disable_dma(CH_EPPI0);
 492
 493                 /* start dma */
 494                 enable_dma(CH_EPPI0);
 495                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 496                 bfin_write_EPPI0_STATUS(0xFFFF);
 497         }
 498
 499         return IRQ_HANDLED;
 500 }
 501
 502 static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
 503 {
 504 #ifndef NO_BL_SUPPORT
 505         struct backlight_properties props;
 506 #endif
 507         struct bfin_bf54xfb_info *info;
 508         struct fb_info *fbinfo;
 509         int ret;
 510
 511         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
 512
 513         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
 514                 printk(KERN_ERR DRIVER_NAME
 515                        ": couldn't request CH_EPPI0 DMA\n");
 516                 ret = -EFAULT;
 517                 goto out1;
 518         }
 519
 520         fbinfo =
 521             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
 522         if (!fbinfo) {
 523                 ret = -ENOMEM;
 524                 goto out2;
 525         }
 526
 527         info = fbinfo->par;
 528         info->fb = fbinfo;
 529         info->dev = &pdev->dev;
 530
 531         platform_set_drvdata(pdev, fbinfo);
 532
 533         strcpy(fbinfo->fix.id, driver_name);
 534
 535         info->mach_info = pdev->dev.platform_data;
 536
 537         if (info->mach_info == NULL) {
 538                 dev_err(&pdev->dev,
 539                         "no platform data for lcd, cannot attach\n");
 540                 ret = -EINVAL;
 541                 goto out3;
 542         }
 543
 544         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 545         fbinfo->fix.type_aux = 0;
 546         fbinfo->fix.xpanstep = 0;
 547         fbinfo->fix.ypanstep = 0;
 548         fbinfo->fix.ywrapstep = 0;
 549         fbinfo->fix.accel = FB_ACCEL_NONE;
 550         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 551
 552         fbinfo->var.nonstd = 0;
 553         fbinfo->var.activate = FB_ACTIVATE_NOW;
 554         fbinfo->var.height = info->mach_info->height;
 555         fbinfo->var.width = info->mach_info->width;
 556         fbinfo->var.accel_flags = 0;
 557         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 558
 559         fbinfo->fbops = &bfin_bf54x_fb_ops;
 560         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 561
 562         fbinfo->var.xres = info->mach_info->xres.defval;
 563         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
 564         fbinfo->var.yres = info->mach_info->yres.defval;
 565         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
 566         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
 567
 568         fbinfo->var.upper_margin = 0;
 569         fbinfo->var.lower_margin = 0;
 570         fbinfo->var.vsync_len = 0;
 571
 572         fbinfo->var.left_margin = 0;
 573         fbinfo->var.right_margin = 0;
 574         fbinfo->var.hsync_len = 0;
 575
 576         fbinfo->var.red.offset = 16;
 577         fbinfo->var.green.offset = 8;
 578         fbinfo->var.blue.offset = 0;
 579         fbinfo->var.transp.offset = 0;
 580         fbinfo->var.red.length = 8;
 581         fbinfo->var.green.length = 8;
 582         fbinfo->var.blue.length = 8;
 583         fbinfo->var.transp.length = 0;
 584         fbinfo->fix.smem_len = info->mach_info->xres.max *
 585             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
 586
 587         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 588             fbinfo->var.bits_per_pixel / 8;
 589
 590         info->fb_buffer =
 591             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 592                                GFP_KERNEL);
 593
 594         if (NULL == info->fb_buffer) {
 595                 printk(KERN_ERR DRIVER_NAME
 596                        ": couldn't allocate dma buffer.\n");
 597                 ret = -ENOMEM;
 598                 goto out3;
 599         }
 600
 601         fbinfo->screen_base = (void *)info->fb_buffer;
 602         fbinfo->fix.smem_start = (int)info->fb_buffer;
 603
 604         fbinfo->fbops = &bfin_bf54x_fb_ops;
 605
 606         fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 607         if (!fbinfo->pseudo_palette) {
 608                 printk(KERN_ERR DRIVER_NAME
 609                        "Fail to allocate pseudo_palette\n");
 610
 611                 ret = -ENOMEM;
 612                 goto out4;
 613         }
 614
 615         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 616             < 0) {
 617                 printk(KERN_ERR DRIVER_NAME
 618                        "Fail to allocate colormap (%d entries)\n",
 619                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 620                 ret = -EFAULT;
 621                 goto out5;
 622         }
 623
 624         if (request_ports(info)) {
 625                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 626                 ret = -EFAULT;
 627                 goto out6;
 628         }
 629
 630         info->irq = platform_get_irq(pdev, 0);
 631         if (info->irq < 0) {
 632                 ret = -EINVAL;
 633                 goto out7;
 634         }
 635
 636         if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
 637                         "PPI ERROR", info) < 0) {
 638                 printk(KERN_ERR DRIVER_NAME
 639                        ": unable to request PPI ERROR IRQ\n");
 640                 ret = -EFAULT;
 641                 goto out7;
 642         }
 643
 644         if (register_framebuffer(fbinfo) < 0) {
 645                 printk(KERN_ERR DRIVER_NAME
 646                        ": unable to register framebuffer.\n");
 647                 ret = -EINVAL;
 648                 goto out8;
 649         }
 650 #ifndef NO_BL_SUPPORT
 651         memset(&props, 0, sizeof(struct backlight_properties));
 652         props.type = BACKLIGHT_RAW;
 653         props.max_brightness = 255;
 654         bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
 655                                            &bfin_lq043fb_bl_ops, &props);
 656         if (IS_ERR(bl_dev)) {
 657                 printk(KERN_ERR DRIVER_NAME
 658                         ": unable to register backlight.\n");
 659                 ret = -EINVAL;
 660                 unregister_framebuffer(fbinfo);
 661                 goto out8;
 662         }
 663
 664         lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
 665         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 666 #endif
 667
 668         return 0;
 669
 670 out8:
 671         free_irq(info->irq, info);
 672 out7:
 673         free_ports(info);
 674 out6:
 675         fb_dealloc_cmap(&fbinfo->cmap);
 676 out5:
 677         kfree(fbinfo->pseudo_palette);
 678 out4:
 679         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 680                           info->dma_handle);
 681 out3:
 682         framebuffer_release(fbinfo);
 683 out2:
 684         free_dma(CH_EPPI0);
 685 out1:
 686         platform_set_drvdata(pdev, NULL);
 687
 688         return ret;
 689 }
 690
 691 static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
 692 {
 693
 694         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 695         struct bfin_bf54xfb_info *info = fbinfo->par;
 696
 697         free_dma(CH_EPPI0);
 698         free_irq(info->irq, info);
 699
 700         if (info->fb_buffer != NULL)
 701                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 702                                   info->dma_handle);
 703
 704         kfree(fbinfo->pseudo_palette);
 705         fb_dealloc_cmap(&fbinfo->cmap);
 706
 707 #ifndef NO_BL_SUPPORT
 708         lcd_device_unregister(lcd_dev);
 709         backlight_device_unregister(bl_dev);
 710 #endif
 711
 712         unregister_framebuffer(fbinfo);
 713
 714         free_ports(info);
 715
 716         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 717
 718         return 0;
 719 }
 720
 721 #ifdef CONFIG_PM
 722 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
 723 {
 724         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 725
 726         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 727         disable_dma(CH_EPPI0);
 728         bfin_write_EPPI0_STATUS(0xFFFF);
 729
 730         return 0;
 731 }
 732
 733 static int bfin_bf54x_resume(struct platform_device *pdev)
 734 {
 735         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 736         struct bfin_bf54xfb_info *info = fbinfo->par;
 737
 738         if (info->lq043_open_cnt) {
 739
 740                 bfin_write_EPPI0_CONTROL(0);
 741                 SSYNC();
 742
 743                 config_dma(info);
 744                 config_ppi(info);
 745
 746                 /* start dma */
 747                 enable_dma(CH_EPPI0);
 748                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 749         }
 750
 751         return 0;
 752 }
 753 #else
 754 #define bfin_bf54x_suspend      NULL
 755 #define bfin_bf54x_resume       NULL
 756 #endif
 757
 758 static struct platform_driver bfin_bf54x_driver = {
 759         .probe = bfin_bf54x_probe,
 760         .remove = __devexit_p(bfin_bf54x_remove),
 761         .suspend = bfin_bf54x_suspend,
 762         .resume = bfin_bf54x_resume,
 763         .driver = {
 764                    .name = DRIVER_NAME,
 765                    .owner = THIS_MODULE,
 766                    },
 767 };
 768
 769 static int __init bfin_bf54x_driver_init(void)
 770 {
 771         return platform_driver_register(&bfin_bf54x_driver);
 772 }
 773
 774 static void __exit bfin_bf54x_driver_cleanup(void)
 775 {
 776         platform_driver_unregister(&bfin_bf54x_driver);
 777 }
 778
 779 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
 780 MODULE_LICENSE("GPL");
 781
 782 module_init(bfin_bf54x_driver_init);
 783 module_exit(bfin_bf54x_driver_cleanup);