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                                            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, NULL)) {
 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);
 268         gpio_set_value(disp, 1);
 269
 270         return 0;
 271 }
 272
 273 static void free_ports(struct bfin_bf54xfb_info *fbi)
 274 {
 275
 276         u16 eppi_req_18[] = EPPI0_18;
 277
 278         gpio_free(fbi->mach_info->disp);
 279
 280         peripheral_free_list(eppi_req_18);
 281
 282         if (!outp_rgb666) {
 283                 u16 eppi_req_24[] = EPPI0_24;
 284                 peripheral_free_list(eppi_req_24);
 285         }
 286 }
 287
 288 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
 289 {
 290         struct bfin_bf54xfb_info *fbi = info->par;
 291
 292         spin_lock(&fbi->lock);
 293         fbi->lq043_open_cnt++;
 294
 295         if (fbi->lq043_open_cnt <= 1) {
 296
 297                 bfin_write_EPPI0_CONTROL(0);
 298                 SSYNC();
 299
 300                 config_dma(fbi);
 301                 config_ppi(fbi);
 302
 303                 /* start dma */
 304                 enable_dma(CH_EPPI0);
 305                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 306         }
 307
 308         spin_unlock(&fbi->lock);
 309
 310         return 0;
 311 }
 312
 313 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
 314 {
 315         struct bfin_bf54xfb_info *fbi = info->par;
 316
 317         spin_lock(&fbi->lock);
 318
 319         fbi->lq043_open_cnt--;
 320         fbi->lq043_mmap = 0;
 321
 322         if (fbi->lq043_open_cnt <= 0) {
 323
 324                 bfin_write_EPPI0_CONTROL(0);
 325                 SSYNC();
 326                 disable_dma(CH_EPPI0);
 327                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
 328         }
 329
 330         spin_unlock(&fbi->lock);
 331
 332         return 0;
 333 }
 334
 335 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
 336                                    struct fb_info *info)
 337 {
 338
 339         if (var->bits_per_pixel != LCD_BPP) {
 340                 pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
 341                          var->bits_per_pixel);
 342                 return -EINVAL;
 343         }
 344
 345         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 346             info->var.xres_virtual != var->xres_virtual ||
 347             info->var.yres_virtual != var->yres_virtual) {
 348                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 349                          __FUNCTION__, var->xres, var->yres);
 350                 return -EINVAL;
 351         }
 352
 353         /*
 354          *  Memory limit
 355          */
 356
 357         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 358                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 359                          __FUNCTION__, var->yres_virtual);
 360                 return -ENOMEM;
 361         }
 362
 363         return 0;
 364 }
 365
 366 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 367 {
 368
 369         struct bfin_bf54xfb_info *fbi = info->par;
 370
 371         if (fbi->lq043_mmap)
 372                 return -1;
 373
 374         spin_lock(&fbi->lock);
 375         fbi->lq043_mmap = 1;
 376         spin_unlock(&fbi->lock);
 377
 378         vma->vm_start = (unsigned long)(fbi->fb_buffer);
 379
 380         vma->vm_end = vma->vm_start + info->fix.smem_len;
 381         /* For those who don't understand how mmap works, go read
 382          *   Documentation/nommu-mmap.txt.
 383          * For those that do, you will know that the VM_MAYSHARE flag
 384          * must be set in the vma->vm_flags structure on noMMU
 385          *   Other flags can be set, and are documented in
 386          *   include/linux/mm.h
 387          */
 388         vma->vm_flags |= VM_MAYSHARE;
 389
 390         return 0;
 391 }
 392
 393 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 394 {
 395         if (nocursor)
 396                 return 0;
 397         else
 398                 return -EINVAL; /* just to force soft_cursor() call */
 399 }
 400
 401 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
 402                                    u_int blue, u_int transp,
 403                                    struct fb_info *info)
 404 {
 405         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 406                 return -EINVAL;
 407
 408         if (info->var.grayscale) {
 409                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 410                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 411         }
 412
 413         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 414
 415                 u32 value;
 416                 /* Place color in the pseudopalette */
 417                 if (regno > 16)
 418                         return -EINVAL;
 419
 420                 red >>= (16 - info->var.red.length);
 421                 green >>= (16 - info->var.green.length);
 422                 blue >>= (16 - info->var.blue.length);
 423
 424                 value = (red << info->var.red.offset) |
 425                     (green << info->var.green.offset) |
 426                     (blue << info->var.blue.offset);
 427                 value &= 0xFFFFFF;
 428
 429                 ((u32 *) (info->pseudo_palette))[regno] = value;
 430
 431         }
 432
 433         return 0;
 434 }
 435
 436 static struct fb_ops bfin_bf54x_fb_ops = {
 437         .owner = THIS_MODULE,
 438         .fb_open = bfin_bf54x_fb_open,
 439         .fb_release = bfin_bf54x_fb_release,
 440         .fb_check_var = bfin_bf54x_fb_check_var,
 441         .fb_fillrect = cfb_fillrect,
 442         .fb_copyarea = cfb_copyarea,
 443         .fb_imageblit = cfb_imageblit,
 444         .fb_mmap = bfin_bf54x_fb_mmap,
 445         .fb_cursor = bfin_bf54x_fb_cursor,
 446         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
 447 };
 448
 449 #ifndef NO_BL_SUPPORT
 450 static int bl_get_brightness(struct backlight_device *bd)
 451 {
 452         return 0;
 453 }
 454
 455 static struct backlight_ops bfin_lq043fb_bl_ops = {
 456         .get_brightness = bl_get_brightness,
 457 };
 458
 459 static struct backlight_device *bl_dev;
 460
 461 static int bfin_lcd_get_power(struct lcd_device *dev)
 462 {
 463         return 0;
 464 }
 465
 466 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 467 {
 468         return 0;
 469 }
 470
 471 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 472 {
 473         return 0;
 474 }
 475
 476 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 477 {
 478
 479         return 0;
 480 }
 481
 482 static int bfin_lcd_check_fb(struct fb_info *fi)
 483 {
 484         if (!fi || (fi == &bfin_bf54x_fb))
 485                 return 1;
 486         return 0;
 487 }
 488
 489 static struct lcd_ops bfin_lcd_ops = {
 490         .get_power = bfin_lcd_get_power,
 491         .set_power = bfin_lcd_set_power,
 492         .get_contrast = bfin_lcd_get_contrast,
 493         .set_contrast = bfin_lcd_set_contrast,
 494         .check_fb = bfin_lcd_check_fb,
 495 };
 496
 497 static struct lcd_device *lcd_dev;
 498 #endif
 499
 500 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
 501 {
 502
 503         /*struct bfin_bf54xfb_info *info = (struct bfin_bf54xfb_info *)dev_id;*/
 504
 505         u16 status = bfin_read_EPPI0_STATUS();
 506
 507         bfin_write_EPPI0_STATUS(0xFFFF);
 508
 509         if (status) {
 510                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 511                 disable_dma(CH_EPPI0);
 512
 513                 /* start dma */
 514                 enable_dma(CH_EPPI0);
 515                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 516                 bfin_write_EPPI0_STATUS(0xFFFF);
 517         }
 518
 519         return IRQ_HANDLED;
 520 }
 521
 522 static int __init bfin_bf54x_probe(struct platform_device *pdev)
 523 {
 524         struct bfin_bf54xfb_info *info;
 525         struct fb_info *fbinfo;
 526         int ret;
 527
 528         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
 529
 530         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
 531                 printk(KERN_ERR DRIVER_NAME
 532                        ": couldn't request CH_EPPI0 DMA\n");
 533                 ret = -EFAULT;
 534                 goto out1;
 535         }
 536
 537         fbinfo =
 538             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
 539         if (!fbinfo) {
 540                 ret = -ENOMEM;
 541                 goto out2;
 542         }
 543
 544         info = fbinfo->par;
 545         info->fb = fbinfo;
 546         info->dev = &pdev->dev;
 547
 548         platform_set_drvdata(pdev, fbinfo);
 549
 550         strcpy(fbinfo->fix.id, driver_name);
 551
 552         info->mach_info = pdev->dev.platform_data;
 553
 554         if (info->mach_info == NULL) {
 555                 dev_err(&pdev->dev,
 556                         "no platform data for lcd, cannot attach\n");
 557                 ret = -EINVAL;
 558                 goto out3;
 559         }
 560
 561         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 562         fbinfo->fix.type_aux = 0;
 563         fbinfo->fix.xpanstep = 0;
 564         fbinfo->fix.ypanstep = 0;
 565         fbinfo->fix.ywrapstep = 0;
 566         fbinfo->fix.accel = FB_ACCEL_NONE;
 567         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 568
 569         fbinfo->var.nonstd = 0;
 570         fbinfo->var.activate = FB_ACTIVATE_NOW;
 571         fbinfo->var.height = info->mach_info->height;
 572         fbinfo->var.width = info->mach_info->width;
 573         fbinfo->var.accel_flags = 0;
 574         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 575
 576         fbinfo->fbops = &bfin_bf54x_fb_ops;
 577         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 578
 579         fbinfo->var.xres = info->mach_info->xres.defval;
 580         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
 581         fbinfo->var.yres = info->mach_info->yres.defval;
 582         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
 583         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
 584
 585         fbinfo->var.upper_margin = 0;
 586         fbinfo->var.lower_margin = 0;
 587         fbinfo->var.vsync_len = 0;
 588
 589         fbinfo->var.left_margin = 0;
 590         fbinfo->var.right_margin = 0;
 591         fbinfo->var.hsync_len = 0;
 592
 593         fbinfo->var.red.offset = 16;
 594         fbinfo->var.green.offset = 8;
 595         fbinfo->var.blue.offset = 0;
 596         fbinfo->var.transp.offset = 0;
 597         fbinfo->var.red.length = 8;
 598         fbinfo->var.green.length = 8;
 599         fbinfo->var.blue.length = 8;
 600         fbinfo->var.transp.length = 0;
 601         fbinfo->fix.smem_len = info->mach_info->xres.max *
 602             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
 603
 604         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 605             fbinfo->var.bits_per_pixel / 8;
 606
 607         info->fb_buffer =
 608             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 609                                GFP_KERNEL);
 610
 611         if (NULL == info->fb_buffer) {
 612                 printk(KERN_ERR DRIVER_NAME
 613                        ": couldn't allocate dma buffer.\n");
 614                 ret = -ENOMEM;
 615                 goto out3;
 616         }
 617
 618         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
 619
 620         fbinfo->screen_base = (void *)info->fb_buffer;
 621         fbinfo->fix.smem_start = (int)info->fb_buffer;
 622
 623         fbinfo->fbops = &bfin_bf54x_fb_ops;
 624
 625         fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
 626         if (!fbinfo->pseudo_palette) {
 627                 printk(KERN_ERR DRIVER_NAME
 628                        "Fail to allocate pseudo_palette\n");
 629
 630                 ret = -ENOMEM;
 631                 goto out4;
 632         }
 633
 634         memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
 635
 636         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 637             < 0) {
 638                 printk(KERN_ERR DRIVER_NAME
 639                        "Fail to allocate colormap (%d entries)\n",
 640                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 641                 ret = -EFAULT;
 642                 goto out5;
 643         }
 644
 645         if (request_ports(info)) {
 646                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 647                 ret = -EFAULT;
 648                 goto out6;
 649         }
 650
 651         info->irq = platform_get_irq(pdev, 0);
 652         if (info->irq < 0) {
 653                 ret = -EINVAL;
 654                 goto out7;
 655         }
 656
 657         if (request_irq(info->irq, (void *)bfin_bf54x_irq_error, IRQF_DISABLED,
 658                         "PPI ERROR", info) < 0) {
 659                 printk(KERN_ERR DRIVER_NAME
 660                        ": unable to request PPI ERROR IRQ\n");
 661                 ret = -EFAULT;
 662                 goto out7;
 663         }
 664
 665         if (register_framebuffer(fbinfo) < 0) {
 666                 printk(KERN_ERR DRIVER_NAME
 667                        ": unable to register framebuffer.\n");
 668                 ret = -EINVAL;
 669                 goto out8;
 670         }
 671 #ifndef NO_BL_SUPPORT
 672         bl_dev =
 673             backlight_device_register("bf54x-bl", NULL, NULL,
 674                                       &bfin_lq043fb_bl_ops);
 675         bl_dev->props.max_brightness = 255;
 676
 677         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 678         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 679 #endif
 680
 681         return 0;
 682
 683 out8:
 684         free_irq(info->irq, info);
 685 out7:
 686         free_ports(info);
 687 out6:
 688         fb_dealloc_cmap(&fbinfo->cmap);
 689 out5:
 690         kfree(fbinfo->pseudo_palette);
 691 out4:
 692         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 693                           info->dma_handle);
 694 out3:
 695         framebuffer_release(fbinfo);
 696 out2:
 697         free_dma(CH_EPPI0);
 698 out1:
 699         platform_set_drvdata(pdev, NULL);
 700
 701         return ret;
 702 }
 703
 704 static int bfin_bf54x_remove(struct platform_device *pdev)
 705 {
 706
 707         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 708         struct bfin_bf54xfb_info *info = fbinfo->par;
 709
 710         free_dma(CH_EPPI0);
 711         free_irq(info->irq, info);
 712
 713         if (info->fb_buffer != NULL)
 714                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 715                                   info->dma_handle);
 716
 717         kfree(fbinfo->pseudo_palette);
 718         fb_dealloc_cmap(&fbinfo->cmap);
 719
 720 #ifndef NO_BL_SUPPORT
 721         lcd_device_unregister(lcd_dev);
 722         backlight_device_unregister(bl_dev);
 723 #endif
 724
 725         unregister_framebuffer(fbinfo);
 726
 727         free_ports(info);
 728
 729         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 730
 731         return 0;
 732 }
 733
 734 #ifdef CONFIG_PM
 735 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
 736 {
 737         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 738         struct bfin_bf54xfb_info *info = fbinfo->par;
 739
 740         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 741         disable_dma(CH_EPPI0);
 742         bfin_write_EPPI0_STATUS(0xFFFF);
 743
 744         return 0;
 745 }
 746
 747 static int bfin_bf54x_resume(struct platform_device *pdev)
 748 {
 749         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 750         struct bfin_bf54xfb_info *info = fbinfo->par;
 751
 752         enable_dma(CH_EPPI0);
 753         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 754
 755         return 0;
 756 }
 757 #else
 758 #define bfin_bf54x_suspend      NULL
 759 #define bfin_bf54x_resume       NULL
 760 #endif
 761
 762 static struct platform_driver bfin_bf54x_driver = {
 763         .probe = bfin_bf54x_probe,
 764         .remove = bfin_bf54x_remove,
 765         .suspend = bfin_bf54x_suspend,
 766         .resume = bfin_bf54x_resume,
 767         .driver = {
 768                    .name = DRIVER_NAME,
 769                    .owner = THIS_MODULE,
 770                    },
 771 };
 772
 773 static int __devinit bfin_bf54x_driver_init(void)
 774 {
 775         return platform_driver_register(&bfin_bf54x_driver);
 776 }
 777
 778 static void __exit bfin_bf54x_driver_cleanup(void)
 779 {
 780         platform_driver_unregister(&bfin_bf54x_driver);
 781 }
 782
 783 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
 784 MODULE_LICENSE("GPL");
 785
 786 module_init(bfin_bf54x_driver_init);
 787 module_exit(bfin_bf54x_driver_cleanup);