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 2004-2007 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 <asm/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         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, NULL)) {
 244                 printk(KERN_ERR "Requesting GPIO %d faild\n", disp);
 245                 return -EFAULT;
 246         }
 247
 248         if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
 249                 printk(KERN_ERR "Requesting Peripherals faild\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 faild\n");
 260                         peripheral_free_list(eppi_req_18);
 261                         gpio_free(disp);
 262                         return -EFAULT;
 263                 }
 264         }
 265
 266         gpio_direction_output(disp);
 267         gpio_set_value(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                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
 327         }
 328
 329         spin_unlock(&fbi->lock);
 330
 331         return 0;
 332 }
 333
 334 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
 335                                    struct fb_info *info)
 336 {
 337
 338         if (var->bits_per_pixel != LCD_BPP) {
 339                 pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
 340                          var->bits_per_pixel);
 341                 return -EINVAL;
 342         }
 343
 344         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 345             info->var.xres_virtual != var->xres_virtual ||
 346             info->var.yres_virtual != var->yres_virtual) {
 347                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 348                          __FUNCTION__, var->xres, var->yres);
 349                 return -EINVAL;
 350         }
 351
 352         /*
 353          *  Memory limit
 354          */
 355
 356         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 357                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 358                          __FUNCTION__, var->yres_virtual);
 359                 return -ENOMEM;
 360         }
 361
 362         return 0;
 363 }
 364
 365 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 366 {
 367
 368         struct bfin_bf54xfb_info *fbi = info->par;
 369
 370         if (fbi->lq043_mmap)
 371                 return -1;
 372
 373         spin_lock(&fbi->lock);
 374         fbi->lq043_mmap = 1;
 375         spin_unlock(&fbi->lock);
 376
 377         vma->vm_start = (unsigned long)(fbi->fb_buffer);
 378
 379         vma->vm_end = vma->vm_start + info->fix.smem_len;
 380         /* For those who don't understand how mmap works, go read
 381          *   Documentation/nommu-mmap.txt.
 382          * For those that do, you will know that the VM_MAYSHARE flag
 383          * must be set in the vma->vm_flags structure on noMMU
 384          *   Other flags can be set, and are documented in
 385          *   include/linux/mm.h
 386          */
 387         vma->vm_flags |= VM_MAYSHARE;
 388
 389         return 0;
 390 }
 391
 392 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 393 {
 394         if (nocursor)
 395                 return 0;
 396         else
 397                 return -EINVAL; /* just to force soft_cursor() call */
 398 }
 399
 400 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
 401                                    u_int blue, u_int transp,
 402                                    struct fb_info *info)
 403 {
 404         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 405                 return -EINVAL;
 406
 407         if (info->var.grayscale) {
 408                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 409                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 410         }
 411
 412         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 413
 414                 u32 value;
 415                 /* Place color in the pseudopalette */
 416                 if (regno > 16)
 417                         return -EINVAL;
 418
 419                 red >>= (16 - info->var.red.length);
 420                 green >>= (16 - info->var.green.length);
 421                 blue >>= (16 - info->var.blue.length);
 422
 423                 value = (red << info->var.red.offset) |
 424                     (green << info->var.green.offset) |
 425                     (blue << info->var.blue.offset);
 426                 value &= 0xFFFFFF;
 427
 428                 ((u32 *) (info->pseudo_palette))[regno] = value;
 429
 430         }
 431
 432         return 0;
 433 }
 434
 435 static struct fb_ops bfin_bf54x_fb_ops = {
 436         .owner = THIS_MODULE,
 437         .fb_open = bfin_bf54x_fb_open,
 438         .fb_release = bfin_bf54x_fb_release,
 439         .fb_check_var = bfin_bf54x_fb_check_var,
 440         .fb_fillrect = cfb_fillrect,
 441         .fb_copyarea = cfb_copyarea,
 442         .fb_imageblit = cfb_imageblit,
 443         .fb_mmap = bfin_bf54x_fb_mmap,
 444         .fb_cursor = bfin_bf54x_fb_cursor,
 445         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
 446 };
 447
 448 #ifndef NO_BL_SUPPORT
 449 static int bl_get_brightness(struct backlight_device *bd)
 450 {
 451         return 0;
 452 }
 453
 454 static struct backlight_ops bfin_lq043fb_bl_ops = {
 455         .get_brightness = bl_get_brightness,
 456 };
 457
 458 static struct backlight_device *bl_dev;
 459
 460 static int bfin_lcd_get_power(struct lcd_device *dev)
 461 {
 462         return 0;
 463 }
 464
 465 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 466 {
 467         return 0;
 468 }
 469
 470 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 471 {
 472         return 0;
 473 }
 474
 475 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 476 {
 477
 478         return 0;
 479 }
 480
 481 static int bfin_lcd_check_fb(struct fb_info *fi)
 482 {
 483         if (!fi || (fi == &bfin_bf54x_fb))
 484                 return 1;
 485         return 0;
 486 }
 487
 488 static struct lcd_ops bfin_lcd_ops = {
 489         .get_power = bfin_lcd_get_power,
 490         .set_power = bfin_lcd_set_power,
 491         .get_contrast = bfin_lcd_get_contrast,
 492         .set_contrast = bfin_lcd_set_contrast,
 493         .check_fb = bfin_lcd_check_fb,
 494 };
 495
 496 static struct lcd_device *lcd_dev;
 497 #endif
 498
 499 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
 500 {
 501
 502         /*struct bfin_bf54xfb_info *info = (struct bfin_bf54xfb_info *)dev_id;*/
 503
 504         u16 status = bfin_read_EPPI0_STATUS();
 505
 506         bfin_write_EPPI0_STATUS(0xFFFF);
 507
 508         if (status) {
 509                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 510                 disable_dma(CH_EPPI0);
 511
 512                 /* start dma */
 513                 enable_dma(CH_EPPI0);
 514                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 515                 bfin_write_EPPI0_STATUS(0xFFFF);
 516         }
 517
 518         return IRQ_HANDLED;
 519 }
 520
 521 static int __init bfin_bf54x_probe(struct platform_device *pdev)
 522 {
 523         struct bfin_bf54xfb_info *info;
 524         struct fb_info *fbinfo;
 525         int ret;
 526
 527         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
 528
 529         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
 530                 printk(KERN_ERR DRIVER_NAME
 531                        ": couldn't request CH_EPPI0 DMA\n");
 532                 ret = -EFAULT;
 533                 goto out1;
 534         }
 535
 536         fbinfo =
 537             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
 538         if (!fbinfo) {
 539                 ret = -ENOMEM;
 540                 goto out2;
 541         }
 542
 543         info = fbinfo->par;
 544         info->fb = fbinfo;
 545         info->dev = &pdev->dev;
 546
 547         platform_set_drvdata(pdev, fbinfo);
 548
 549         strcpy(fbinfo->fix.id, driver_name);
 550
 551         info->mach_info = pdev->dev.platform_data;
 552
 553         if (info->mach_info == NULL) {
 554                 dev_err(&pdev->dev,
 555                         "no platform data for lcd, cannot attach\n");
 556                 ret = -EINVAL;
 557                 goto out3;
 558         }
 559
 560         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 561         fbinfo->fix.type_aux = 0;
 562         fbinfo->fix.xpanstep = 0;
 563         fbinfo->fix.ypanstep = 0;
 564         fbinfo->fix.ywrapstep = 0;
 565         fbinfo->fix.accel = FB_ACCEL_NONE;
 566         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 567
 568         fbinfo->var.nonstd = 0;
 569         fbinfo->var.activate = FB_ACTIVATE_NOW;
 570         fbinfo->var.height = info->mach_info->height;
 571         fbinfo->var.width = info->mach_info->width;
 572         fbinfo->var.accel_flags = 0;
 573         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 574
 575         fbinfo->fbops = &bfin_bf54x_fb_ops;
 576         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 577
 578         fbinfo->var.xres = info->mach_info->xres.defval;
 579         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
 580         fbinfo->var.yres = info->mach_info->yres.defval;
 581         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
 582         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
 583
 584         fbinfo->var.upper_margin = 0;
 585         fbinfo->var.lower_margin = 0;
 586         fbinfo->var.vsync_len = 0;
 587
 588         fbinfo->var.left_margin = 0;
 589         fbinfo->var.right_margin = 0;
 590         fbinfo->var.hsync_len = 0;
 591
 592         fbinfo->var.red.offset = 16;
 593         fbinfo->var.green.offset = 8;
 594         fbinfo->var.blue.offset = 0;
 595         fbinfo->var.transp.offset = 0;
 596         fbinfo->var.red.length = 8;
 597         fbinfo->var.green.length = 8;
 598         fbinfo->var.blue.length = 8;
 599         fbinfo->var.transp.length = 0;
 600         fbinfo->fix.smem_len = info->mach_info->xres.max *
 601             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
 602
 603         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 604             fbinfo->var.bits_per_pixel / 8;
 605
 606         info->fb_buffer =
 607             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 608                                GFP_KERNEL);
 609
 610         if (NULL == info->fb_buffer) {
 611                 printk(KERN_ERR DRIVER_NAME
 612                        ": couldn't allocate dma buffer.\n");
 613                 ret = -ENOMEM;
 614                 goto out3;
 615         }
 616
 617         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
 618
 619         fbinfo->screen_base = (void *)info->fb_buffer;
 620         fbinfo->fix.smem_start = (int)info->fb_buffer;
 621
 622         fbinfo->fbops = &bfin_bf54x_fb_ops;
 623
 624         fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
 625         if (!fbinfo->pseudo_palette) {
 626                 printk(KERN_ERR DRIVER_NAME
 627                        "Fail to allocate pseudo_palette\n");
 628
 629                 ret = -ENOMEM;
 630                 goto out4;
 631         }
 632
 633         memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
 634
 635         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 636             < 0) {
 637                 printk(KERN_ERR DRIVER_NAME
 638                        "Fail to allocate colormap (%d entries)\n",
 639                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 640                 ret = -EFAULT;
 641                 goto out5;
 642         }
 643
 644         if (request_ports(info)) {
 645                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 646                 ret = -EFAULT;
 647                 goto out6;
 648         }
 649
 650         info->irq = platform_get_irq(pdev, 0);
 651         if (info->irq < 0) {
 652                 ret = -EINVAL;
 653                 goto out7;
 654         }
 655
 656         if (request_irq(info->irq, (void *)bfin_bf54x_irq_error, IRQF_DISABLED,
 657                         "PPI ERROR", info) < 0) {
 658                 printk(KERN_ERR DRIVER_NAME
 659                        ": unable to request PPI ERROR IRQ\n");
 660                 ret = -EFAULT;
 661                 goto out7;
 662         }
 663
 664         if (register_framebuffer(fbinfo) < 0) {
 665                 printk(KERN_ERR DRIVER_NAME
 666                        ": unable to register framebuffer.\n");
 667                 ret = -EINVAL;
 668                 goto out8;
 669         }
 670 #ifndef NO_BL_SUPPORT
 671         bl_dev =
 672             backlight_device_register("bf54x-bl", NULL, NULL,
 673                                       &bfin_lq043fb_bl_ops);
 674         bl_dev->props.max_brightness = 255;
 675
 676         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 677         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 678 #endif
 679
 680         return 0;
 681
 682 out8:
 683         free_irq(info->irq, info);
 684 out7:
 685         free_ports(info);
 686 out6:
 687         fb_dealloc_cmap(&fbinfo->cmap);
 688 out5:
 689         kfree(fbinfo->pseudo_palette);
 690 out4:
 691         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 692                           info->dma_handle);
 693 out3:
 694         framebuffer_release(fbinfo);
 695 out2:
 696         free_dma(CH_EPPI0);
 697 out1:
 698         platform_set_drvdata(pdev, NULL);
 699
 700         return ret;
 701 }
 702
 703 static int bfin_bf54x_remove(struct platform_device *pdev)
 704 {
 705
 706         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 707         struct bfin_bf54xfb_info *info = fbinfo->par;
 708
 709         free_dma(CH_EPPI0);
 710         free_irq(info->irq, info);
 711
 712         if (info->fb_buffer != NULL)
 713                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 714                                   info->dma_handle);
 715
 716         kfree(fbinfo->pseudo_palette);
 717         fb_dealloc_cmap(&fbinfo->cmap);
 718
 719 #ifndef NO_BL_SUPPORT
 720         lcd_device_unregister(lcd_dev);
 721         backlight_device_unregister(bl_dev);
 722 #endif
 723
 724         unregister_framebuffer(fbinfo);
 725
 726         free_ports(info);
 727
 728         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 729
 730         return 0;
 731 }
 732
 733 #ifdef CONFIG_PM
 734 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
 735 {
 736         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 737         struct bfin_bf54xfb_info *info = fbinfo->par;
 738
 739         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 740         disable_dma(CH_EPPI0);
 741         bfin_write_EPPI0_STATUS(0xFFFF);
 742
 743         return 0;
 744 }
 745
 746 static int bfin_bf54x_resume(struct platform_device *pdev)
 747 {
 748         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 749         struct bfin_bf54xfb_info *info = fbinfo->par;
 750
 751         enable_dma(CH_EPPI0);
 752         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 753
 754         return 0;
 755 }
 756 #else
 757 #define bfin_bf54x_suspend      NULL
 758 #define bfin_bf54x_resume       NULL
 759 #endif
 760
 761 static struct platform_driver bfin_bf54x_driver = {
 762         .probe = bfin_bf54x_probe,
 763         .remove = bfin_bf54x_remove,
 764         .suspend = bfin_bf54x_suspend,
 765         .resume = bfin_bf54x_resume,
 766         .driver = {
 767                    .name = DRIVER_NAME,
 768                    .owner = THIS_MODULE,
 769                    },
 770 };
 771
 772 static int __devinit bfin_bf54x_driver_init(void)
 773 {
 774         return platform_driver_register(&bfin_bf54x_driver);
 775 }
 776
 777 static void __exit bfin_bf54x_driver_cleanup(void)
 778 {
 779         platform_driver_unregister(&bfin_bf54x_driver);
 780 }
 781
 782 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
 783 MODULE_LICENSE("GPL");
 784
 785 module_init(bfin_bf54x_driver_init);
 786 module_exit(bfin_bf54x_driver_cleanup);