git.oblomov.eu Git - linux-2.6/blob - 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_mmap;
  86         int lq043_open_cnt;
  87         int irq;
  88         spinlock_t lock;        /* lock */
  89 };
  90
  91 static int nocursor;
  92 module_param(nocursor, int, 0644);
  93 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  94
  95 static int outp_rgb666;
  96 module_param(outp_rgb666, int, 0);
  97 MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
  98
  99 #define LCD_X_RES               480     /*Horizontal Resolution */
 100 #define LCD_Y_RES               272     /* Vertical Resolution */
 101
 102 #define LCD_BPP                 24      /* Bit Per Pixel */
 103 #define DMA_BUS_SIZE            32
 104
 105 /*      -- Horizontal synchronizing --
 106  *
 107  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
 108  * (LCY-W-06602A Page 9 of 22)
 109  *
 110  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
 111  *
 112  * Period               TH - 525 - Clock
 113  * Pulse width          THp - 41 - Clock
 114  * Horizontal period    THd - 480 - Clock
 115  * Back porch           THb - 2 - Clock
 116  * Front porch          THf - 2 - Clock
 117  *
 118  * -- Vertical synchronizing --
 119  * Period               TV - 286 - Line
 120  * Pulse width          TVp - 10 - Line
 121  * Vertical period      TVd - 272 - Line
 122  * Back porch           TVb - 2 - Line
 123  * Front porch          TVf - 2 - Line
 124  */
 125
 126 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
 127
 128 /* # active data to transfer after Horizontal Delay clock */
 129 #define EPPI_HCOUNT             LCD_X_RES
 130
 131 /* # active lines to transfer after Vertical Delay clock */
 132 #define EPPI_VCOUNT             LCD_Y_RES
 133
 134 /* Samples per Line = 480 (active data) + 45 (padding) */
 135 #define EPPI_LINE               525
 136
 137 /* Lines per Frame = 272 (active data) + 14 (padding) */
 138 #define EPPI_FRAME              286
 139
 140 /* FS1 (Hsync) Width (Typical)*/
 141 #define EPPI_FS1W_HBL           41
 142
 143 /* FS1 (Hsync) Period (Typical) */
 144 #define EPPI_FS1P_AVPL          EPPI_LINE
 145
 146 /* Horizontal Delay clock after assertion of Hsync (Typical) */
 147 #define EPPI_HDELAY             43
 148
 149 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
 150 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
 151
 152  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
 153 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
 154
 155 /* Vertical Delay after assertion of Vsync (2 Lines) */
 156 #define EPPI_VDELAY             12
 157
 158 #define EPPI_CLIP               0xFF00FF00
 159
 160 /* EPPI Control register configuration value for RGB out
 161  * - EPPI as Output
 162  * GP 2 frame sync mode,
 163  * Internal Clock generation disabled, Internal FS generation enabled,
 164  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
 165  * FS1 & FS2 are active high,
 166  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 167  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
 168  * Swapping Enabled,
 169  * One (DMA) Channel Mode,
 170  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 171  * Regular watermark - when FIFO is 100% full,
 172  * Urgent watermark - when FIFO is 75% full
 173  */
 174
 175 #define EPPI_CONTROL            (0x20136E2E | SWAPEN)
 176
 177 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
 178 {
 179         u32 sclk = get_sclk();
 180
 181         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
 182
 183         return (((sclk / target_ppi_clk) / 2) - 1);
 184 }
 185
 186 static void config_ppi(struct bfin_bf54xfb_info *fbi)
 187 {
 188
 189         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
 190
 191         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
 192         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
 193         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
 194         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
 195         bfin_write_EPPI0_CLIP(EPPI_CLIP);
 196
 197         bfin_write_EPPI0_FRAME(EPPI_FRAME);
 198         bfin_write_EPPI0_LINE(EPPI_LINE);
 199
 200         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
 201         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
 202         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
 203         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
 204
 205         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
 206
 207 /*
 208  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 209  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 210  */
 211         if (outp_rgb666)
 212                 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
 213                                          RGB_FMT_EN);
 214         else
 215                 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
 216                                          ~RGB_FMT_EN);
 217
 218
 219 }
 220
 221 static int config_dma(struct bfin_bf54xfb_info *fbi)
 222 {
 223
 224         set_dma_config(CH_EPPI0,
 225                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
 226                                            INTR_DISABLE, DIMENSION_2D,
 227                                            DATA_SIZE_32,
 228                                            DMA_NOSYNC_KEEP_DMA_BUF));
 229         set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
 230         set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
 231         set_dma_y_count(CH_EPPI0, LCD_Y_RES);
 232         set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
 233         set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
 234
 235         return 0;
 236 }
 237
 238 static int request_ports(struct bfin_bf54xfb_info *fbi)
 239 {
 240
 241         u16 eppi_req_18[] = EPPI0_18;
 242         u16 disp = fbi->mach_info->disp;
 243
 244         if (gpio_request(disp, DRIVER_NAME)) {
 245                 printk(KERN_ERR "Requesting GPIO %d faild\n", disp);
 246                 return -EFAULT;
 247         }
 248
 249         if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
 250                 printk(KERN_ERR "Requesting Peripherals faild\n");
 251                 gpio_free(disp);
 252                 return -EFAULT;
 253         }
 254
 255         if (!outp_rgb666) {
 256
 257                 u16 eppi_req_24[] = EPPI0_24;
 258
 259                 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
 260                         printk(KERN_ERR "Requesting Peripherals faild\n");
 261                         peripheral_free_list(eppi_req_18);
 262                         gpio_free(disp);
 263                         return -EFAULT;
 264                 }
 265         }
 266
 267         gpio_direction_output(disp, 1);
 268
 269         return 0;
 270 }
 271
 272 static void free_ports(struct bfin_bf54xfb_info *fbi)
 273 {
 274
 275         u16 eppi_req_18[] = EPPI0_18;
 276
 277         gpio_free(fbi->mach_info->disp);
 278
 279         peripheral_free_list(eppi_req_18);
 280
 281         if (!outp_rgb666) {
 282                 u16 eppi_req_24[] = EPPI0_24;
 283                 peripheral_free_list(eppi_req_24);
 284         }
 285 }
 286
 287 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
 288 {
 289         struct bfin_bf54xfb_info *fbi = info->par;
 290
 291         spin_lock(&fbi->lock);
 292         fbi->lq043_open_cnt++;
 293
 294         if (fbi->lq043_open_cnt <= 1) {
 295
 296                 bfin_write_EPPI0_CONTROL(0);
 297                 SSYNC();
 298
 299                 config_dma(fbi);
 300                 config_ppi(fbi);
 301
 302                 /* start dma */
 303                 enable_dma(CH_EPPI0);
 304                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 305         }
 306
 307         spin_unlock(&fbi->lock);
 308
 309         return 0;
 310 }
 311
 312 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
 313 {
 314         struct bfin_bf54xfb_info *fbi = info->par;
 315
 316         spin_lock(&fbi->lock);
 317
 318         fbi->lq043_open_cnt--;
 319         fbi->lq043_mmap = 0;
 320
 321         if (fbi->lq043_open_cnt <= 0) {
 322
 323                 bfin_write_EPPI0_CONTROL(0);
 324                 SSYNC();
 325                 disable_dma(CH_EPPI0);
 326         }
 327
 328         spin_unlock(&fbi->lock);
 329
 330         return 0;
 331 }
 332
 333 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
 334                                    struct fb_info *info)
 335 {
 336
 337         switch (var->bits_per_pixel) {
 338         case 24:/* TRUECOLOUR, 16m */
 339                 var->red.offset = 16;
 340                 var->green.offset = 8;
 341                 var->blue.offset = 0;
 342                 var->red.length = var->green.length = var->blue.length = 8;
 343                 var->transp.offset = 0;
 344                 var->transp.length = 0;
 345                 var->transp.msb_right = 0;
 346                 var->red.msb_right = 0;
 347                 var->green.msb_right = 0;
 348                 var->blue.msb_right = 0;
 349                 break;
 350         default:
 351                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 352                          var->bits_per_pixel);
 353                 return -EINVAL;
 354         }
 355
 356         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 357             info->var.xres_virtual != var->xres_virtual ||
 358             info->var.yres_virtual != var->yres_virtual) {
 359                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 360                          __func__, var->xres, var->yres);
 361                 return -EINVAL;
 362         }
 363
 364         /*
 365          *  Memory limit
 366          */
 367
 368         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 369                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 370                          __func__, var->yres_virtual);
 371                 return -ENOMEM;
 372         }
 373
 374         return 0;
 375 }
 376
 377 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 378 {
 379
 380         struct bfin_bf54xfb_info *fbi = info->par;
 381
 382         if (fbi->lq043_mmap)
 383                 return -1;
 384
 385         spin_lock(&fbi->lock);
 386         fbi->lq043_mmap = 1;
 387         spin_unlock(&fbi->lock);
 388
 389         vma->vm_start = (unsigned long)(fbi->fb_buffer);
 390
 391         vma->vm_end = vma->vm_start + info->fix.smem_len;
 392         /* For those who don't understand how mmap works, go read
 393          *   Documentation/nommu-mmap.txt.
 394          * For those that do, you will know that the VM_MAYSHARE flag
 395          * must be set in the vma->vm_flags structure on noMMU
 396          *   Other flags can be set, and are documented in
 397          *   include/linux/mm.h
 398          */
 399         vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
 400
 401         return 0;
 402 }
 403
 404 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 405 {
 406         if (nocursor)
 407                 return 0;
 408         else
 409                 return -EINVAL; /* just to force soft_cursor() call */
 410 }
 411
 412 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
 413                                    u_int blue, u_int transp,
 414                                    struct fb_info *info)
 415 {
 416         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 417                 return -EINVAL;
 418
 419         if (info->var.grayscale) {
 420                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 421                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 422         }
 423
 424         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 425
 426                 u32 value;
 427                 /* Place color in the pseudopalette */
 428                 if (regno > 16)
 429                         return -EINVAL;
 430
 431                 red >>= (16 - info->var.red.length);
 432                 green >>= (16 - info->var.green.length);
 433                 blue >>= (16 - info->var.blue.length);
 434
 435                 value = (red << info->var.red.offset) |
 436                     (green << info->var.green.offset) |
 437                     (blue << info->var.blue.offset);
 438                 value &= 0xFFFFFF;
 439
 440                 ((u32 *) (info->pseudo_palette))[regno] = value;
 441
 442         }
 443
 444         return 0;
 445 }
 446
 447 static struct fb_ops bfin_bf54x_fb_ops = {
 448         .owner = THIS_MODULE,
 449         .fb_open = bfin_bf54x_fb_open,
 450         .fb_release = bfin_bf54x_fb_release,
 451         .fb_check_var = bfin_bf54x_fb_check_var,
 452         .fb_fillrect = cfb_fillrect,
 453         .fb_copyarea = cfb_copyarea,
 454         .fb_imageblit = cfb_imageblit,
 455         .fb_mmap = bfin_bf54x_fb_mmap,
 456         .fb_cursor = bfin_bf54x_fb_cursor,
 457         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
 458 };
 459
 460 #ifndef NO_BL_SUPPORT
 461 static int bl_get_brightness(struct backlight_device *bd)
 462 {
 463         return 0;
 464 }
 465
 466 static struct backlight_ops bfin_lq043fb_bl_ops = {
 467         .get_brightness = bl_get_brightness,
 468 };
 469
 470 static struct backlight_device *bl_dev;
 471
 472 static int bfin_lcd_get_power(struct lcd_device *dev)
 473 {
 474         return 0;
 475 }
 476
 477 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 478 {
 479         return 0;
 480 }
 481
 482 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 483 {
 484         return 0;
 485 }
 486
 487 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 488 {
 489
 490         return 0;
 491 }
 492
 493 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
 494 {
 495         if (!fi || (fi == &bfin_bf54x_fb))
 496                 return 1;
 497         return 0;
 498 }
 499
 500 static struct lcd_ops bfin_lcd_ops = {
 501         .get_power = bfin_lcd_get_power,
 502         .set_power = bfin_lcd_set_power,
 503         .get_contrast = bfin_lcd_get_contrast,
 504         .set_contrast = bfin_lcd_set_contrast,
 505         .check_fb = bfin_lcd_check_fb,
 506 };
 507
 508 static struct lcd_device *lcd_dev;
 509 #endif
 510
 511 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
 512 {
 513         /*struct bfin_bf54xfb_info *info = dev_id;*/
 514
 515         u16 status = bfin_read_EPPI0_STATUS();
 516
 517         bfin_write_EPPI0_STATUS(0xFFFF);
 518
 519         if (status) {
 520                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 521                 disable_dma(CH_EPPI0);
 522
 523                 /* start dma */
 524                 enable_dma(CH_EPPI0);
 525                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 526                 bfin_write_EPPI0_STATUS(0xFFFF);
 527         }
 528
 529         return IRQ_HANDLED;
 530 }
 531
 532 static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
 533 {
 534         struct bfin_bf54xfb_info *info;
 535         struct fb_info *fbinfo;
 536         int ret;
 537
 538         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
 539
 540         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
 541                 printk(KERN_ERR DRIVER_NAME
 542                        ": couldn't request CH_EPPI0 DMA\n");
 543                 ret = -EFAULT;
 544                 goto out1;
 545         }
 546
 547         fbinfo =
 548             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
 549         if (!fbinfo) {
 550                 ret = -ENOMEM;
 551                 goto out2;
 552         }
 553
 554         info = fbinfo->par;
 555         info->fb = fbinfo;
 556         info->dev = &pdev->dev;
 557
 558         platform_set_drvdata(pdev, fbinfo);
 559
 560         strcpy(fbinfo->fix.id, driver_name);
 561
 562         info->mach_info = pdev->dev.platform_data;
 563
 564         if (info->mach_info == NULL) {
 565                 dev_err(&pdev->dev,
 566                         "no platform data for lcd, cannot attach\n");
 567                 ret = -EINVAL;
 568                 goto out3;
 569         }
 570
 571         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 572         fbinfo->fix.type_aux = 0;
 573         fbinfo->fix.xpanstep = 0;
 574         fbinfo->fix.ypanstep = 0;
 575         fbinfo->fix.ywrapstep = 0;
 576         fbinfo->fix.accel = FB_ACCEL_NONE;
 577         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 578
 579         fbinfo->var.nonstd = 0;
 580         fbinfo->var.activate = FB_ACTIVATE_NOW;
 581         fbinfo->var.height = info->mach_info->height;
 582         fbinfo->var.width = info->mach_info->width;
 583         fbinfo->var.accel_flags = 0;
 584         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 585
 586         fbinfo->fbops = &bfin_bf54x_fb_ops;
 587         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 588
 589         fbinfo->var.xres = info->mach_info->xres.defval;
 590         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
 591         fbinfo->var.yres = info->mach_info->yres.defval;
 592         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
 593         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
 594
 595         fbinfo->var.upper_margin = 0;
 596         fbinfo->var.lower_margin = 0;
 597         fbinfo->var.vsync_len = 0;
 598
 599         fbinfo->var.left_margin = 0;
 600         fbinfo->var.right_margin = 0;
 601         fbinfo->var.hsync_len = 0;
 602
 603         fbinfo->var.red.offset = 16;
 604         fbinfo->var.green.offset = 8;
 605         fbinfo->var.blue.offset = 0;
 606         fbinfo->var.transp.offset = 0;
 607         fbinfo->var.red.length = 8;
 608         fbinfo->var.green.length = 8;
 609         fbinfo->var.blue.length = 8;
 610         fbinfo->var.transp.length = 0;
 611         fbinfo->fix.smem_len = info->mach_info->xres.max *
 612             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
 613
 614         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 615             fbinfo->var.bits_per_pixel / 8;
 616
 617         info->fb_buffer =
 618             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 619                                GFP_KERNEL);
 620
 621         if (NULL == info->fb_buffer) {
 622                 printk(KERN_ERR DRIVER_NAME
 623                        ": couldn't allocate dma buffer.\n");
 624                 ret = -ENOMEM;
 625                 goto out3;
 626         }
 627
 628         fbinfo->screen_base = (void *)info->fb_buffer;
 629         fbinfo->fix.smem_start = (int)info->fb_buffer;
 630
 631         fbinfo->fbops = &bfin_bf54x_fb_ops;
 632
 633         fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
 634         if (!fbinfo->pseudo_palette) {
 635                 printk(KERN_ERR DRIVER_NAME
 636                        "Fail to allocate pseudo_palette\n");
 637
 638                 ret = -ENOMEM;
 639                 goto out4;
 640         }
 641
 642         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 643             < 0) {
 644                 printk(KERN_ERR DRIVER_NAME
 645                        "Fail to allocate colormap (%d entries)\n",
 646                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 647                 ret = -EFAULT;
 648                 goto out5;
 649         }
 650
 651         if (request_ports(info)) {
 652                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 653                 ret = -EFAULT;
 654                 goto out6;
 655         }
 656
 657         info->irq = platform_get_irq(pdev, 0);
 658         if (info->irq < 0) {
 659                 ret = -EINVAL;
 660                 goto out7;
 661         }
 662
 663         if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
 664                         "PPI ERROR", info) < 0) {
 665                 printk(KERN_ERR DRIVER_NAME
 666                        ": unable to request PPI ERROR IRQ\n");
 667                 ret = -EFAULT;
 668                 goto out7;
 669         }
 670
 671         if (register_framebuffer(fbinfo) < 0) {
 672                 printk(KERN_ERR DRIVER_NAME
 673                        ": unable to register framebuffer.\n");
 674                 ret = -EINVAL;
 675                 goto out8;
 676         }
 677 #ifndef NO_BL_SUPPORT
 678         bl_dev =
 679             backlight_device_register("bf54x-bl", NULL, NULL,
 680                                       &bfin_lq043fb_bl_ops);
 681         bl_dev->props.max_brightness = 255;
 682
 683         lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
 684         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 685 #endif
 686
 687         return 0;
 688
 689 out8:
 690         free_irq(info->irq, info);
 691 out7:
 692         free_ports(info);
 693 out6:
 694         fb_dealloc_cmap(&fbinfo->cmap);
 695 out5:
 696         kfree(fbinfo->pseudo_palette);
 697 out4:
 698         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 699                           info->dma_handle);
 700 out3:
 701         framebuffer_release(fbinfo);
 702 out2:
 703         free_dma(CH_EPPI0);
 704 out1:
 705         platform_set_drvdata(pdev, NULL);
 706
 707         return ret;
 708 }
 709
 710 static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
 711 {
 712
 713         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 714         struct bfin_bf54xfb_info *info = fbinfo->par;
 715
 716         free_dma(CH_EPPI0);
 717         free_irq(info->irq, info);
 718
 719         if (info->fb_buffer != NULL)
 720                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 721                                   info->dma_handle);
 722
 723         kfree(fbinfo->pseudo_palette);
 724         fb_dealloc_cmap(&fbinfo->cmap);
 725
 726 #ifndef NO_BL_SUPPORT
 727         lcd_device_unregister(lcd_dev);
 728         backlight_device_unregister(bl_dev);
 729 #endif
 730
 731         unregister_framebuffer(fbinfo);
 732
 733         free_ports(info);
 734
 735         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 736
 737         return 0;
 738 }
 739
 740 #ifdef CONFIG_PM
 741 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
 742 {
 743         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 744
 745         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 746         disable_dma(CH_EPPI0);
 747         bfin_write_EPPI0_STATUS(0xFFFF);
 748
 749         return 0;
 750 }
 751
 752 static int bfin_bf54x_resume(struct platform_device *pdev)
 753 {
 754         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 755         struct bfin_bf54xfb_info *info = fbinfo->par;
 756
 757         if (info->lq043_open_cnt) {
 758
 759                 bfin_write_EPPI0_CONTROL(0);
 760                 SSYNC();
 761
 762                 config_dma(info);
 763                 config_ppi(info);
 764
 765                 /* start dma */
 766                 enable_dma(CH_EPPI0);
 767                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 768         }
 769
 770         return 0;
 771 }
 772 #else
 773 #define bfin_bf54x_suspend      NULL
 774 #define bfin_bf54x_resume       NULL
 775 #endif
 776
 777 static struct platform_driver bfin_bf54x_driver = {
 778         .probe = bfin_bf54x_probe,
 779         .remove = __devexit_p(bfin_bf54x_remove),
 780         .suspend = bfin_bf54x_suspend,
 781         .resume = bfin_bf54x_resume,
 782         .driver = {
 783                    .name = DRIVER_NAME,
 784                    .owner = THIS_MODULE,
 785                    },
 786 };
 787
 788 static int __init bfin_bf54x_driver_init(void)
 789 {
 790         return platform_driver_register(&bfin_bf54x_driver);
 791 }
 792
 793 static void __exit bfin_bf54x_driver_cleanup(void)
 794 {
 795         platform_driver_unregister(&bfin_bf54x_driver);
 796 }
 797
 798 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
 799 MODULE_LICENSE("GPL");
 800
 801 module_init(bfin_bf54x_driver_init);
 802 module_exit(bfin_bf54x_driver_cleanup);