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   1 /*
   2  * File:         drivers/video/bfin-t350mcqb-fb.c
   3  * Based on:
   4  * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
   5  *
   6  * Created:
   7  * Description:  Blackfin LCD 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/fb.h>
  36 #include <linux/init.h>
  37 #include <linux/types.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/device.h>
  40 #include <linux/backlight.h>
  41 #include <linux/lcd.h>
  42 #include <linux/dma-mapping.h>
  43 #include <linux/platform_device.h>
  44
  45 #include <asm/blackfin.h>
  46 #include <asm/irq.h>
  47 #include <asm/dma-mapping.h>
  48 #include <asm/dma.h>
  49 #include <asm/portmux.h>
  50 #include <asm/gptimers.h>
  51
  52 #define NO_BL_SUPPORT
  53
  54 #define LCD_X_RES               320     /* Horizontal Resolution */
  55 #define LCD_Y_RES               240     /* Vertical Resolution */
  56 #define LCD_BPP                 24      /* Bit Per Pixel */
  57
  58 #define DMA_BUS_SIZE            16
  59 #define LCD_CLK                 (12*1000*1000)  /* 12MHz */
  60
  61 #define CLOCKS_PER_PIX          3
  62
  63         /*
  64          * HS and VS timing parameters (all in number of PPI clk ticks)
  65          */
  66
  67 #define U_LINE          1                               /* Blanking Lines */
  68
  69 #define H_ACTPIX        (LCD_X_RES * CLOCKS_PER_PIX)    /* active horizontal pixel */
  70 #define H_PERIOD        (408 * CLOCKS_PER_PIX)          /* HS period */
  71 #define H_PULSE         90                              /* HS pulse width */
  72 #define H_START         204                             /* first valid pixel */
  73
  74 #define V_LINES         (LCD_Y_RES + U_LINE)            /* total vertical lines */
  75 #define V_PULSE         (3 * H_PERIOD)                  /* VS pulse width (1-5 H_PERIODs) */
  76 #define V_PERIOD        (H_PERIOD * V_LINES)            /* VS period */
  77
  78 #define ACTIVE_VIDEO_MEM_OFFSET (U_LINE * H_ACTPIX)
  79
  80 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
  81
  82 #define DRIVER_NAME "bfin-t350mcqb"
  83 static char driver_name[] = DRIVER_NAME;
  84
  85 struct bfin_t350mcqbfb_info {
  86         struct fb_info *fb;
  87         struct device *dev;
  88         unsigned char *fb_buffer;       /* RGB Buffer */
  89         dma_addr_t dma_handle;
  90         int lq043_mmap;
  91         int lq043_open_cnt;
  92         int irq;
  93         spinlock_t lock;        /* lock */
  94 };
  95
  96 static int nocursor;
  97 module_param(nocursor, int, 0644);
  98 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
  99
 100 #define PPI_TX_MODE             0x2
 101 #define PPI_XFER_TYPE_11        0xC
 102 #define PPI_PORT_CFG_01         0x10
 103 #define PPI_PACK_EN             0x80
 104 #define PPI_POLS_1              0x8000
 105
 106 static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
 107 {
 108         bfin_write_PPI_DELAY(H_START);
 109         bfin_write_PPI_COUNT(H_ACTPIX-1);
 110         bfin_write_PPI_FRAME(V_LINES);
 111
 112         bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
 113                                 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
 114                                 PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
 115                                 PPI_PACK_EN |      /* packing enabled PACK_EN */
 116                                 PPI_POLS_1);       /* faling edge syncs POLS */
 117 }
 118
 119 static inline void bfin_t350mcqb_disable_ppi(void)
 120 {
 121         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 122 }
 123
 124 static inline void bfin_t350mcqb_enable_ppi(void)
 125 {
 126         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 127 }
 128
 129 static void bfin_t350mcqb_start_timers(void)
 130 {
 131         unsigned long flags;
 132
 133         local_irq_save(flags);
 134                 enable_gptimers(TIMER1bit);
 135                 enable_gptimers(TIMER0bit);
 136         local_irq_restore(flags);
 137 }
 138
 139 static void bfin_t350mcqb_stop_timers(void)
 140 {
 141         disable_gptimers(TIMER0bit | TIMER1bit);
 142
 143         set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
 144                                 TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
 145                                  TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);
 146
 147 }
 148
 149 static void bfin_t350mcqb_init_timers(void)
 150 {
 151
 152         bfin_t350mcqb_stop_timers();
 153
 154         set_gptimer_period(TIMER0_id, H_PERIOD);
 155         set_gptimer_pwidth(TIMER0_id, H_PULSE);
 156         set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 157                                       TIMER_TIN_SEL | TIMER_CLK_SEL|
 158                                       TIMER_EMU_RUN);
 159
 160         set_gptimer_period(TIMER1_id, V_PERIOD);
 161         set_gptimer_pwidth(TIMER1_id, V_PULSE);
 162         set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 163                                       TIMER_TIN_SEL | TIMER_CLK_SEL |
 164                                       TIMER_EMU_RUN);
 165
 166 }
 167
 168 static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
 169 {
 170
 171         set_dma_config(CH_PPI,
 172                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
 173                                            INTR_DISABLE, DIMENSION_2D,
 174                                            DATA_SIZE_16,
 175                                            DMA_NOSYNC_KEEP_DMA_BUF));
 176         set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
 177         set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
 178         set_dma_y_count(CH_PPI, V_LINES);
 179
 180         set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
 181         set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
 182
 183 }
 184
 185 static int bfin_t350mcqb_request_ports(int action)
 186 {
 187         u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
 188                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
 189                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
 190                             P_PPI0_D6, P_PPI0_D7, 0};
 191
 192         if (action) {
 193                 if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {
 194                         printk(KERN_ERR "Requesting Peripherals faild\n");
 195                         return -EFAULT;
 196                 }
 197         } else
 198                 peripheral_free_list(ppi0_req_8);
 199
 200         return 0;
 201 }
 202
 203 static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
 204 {
 205         struct bfin_t350mcqbfb_info *fbi = info->par;
 206
 207         spin_lock(&fbi->lock);
 208         fbi->lq043_open_cnt++;
 209
 210         if (fbi->lq043_open_cnt <= 1) {
 211
 212                 bfin_t350mcqb_disable_ppi();
 213                 SSYNC();
 214
 215                 bfin_t350mcqb_config_dma(fbi);
 216                 bfin_t350mcqb_config_ppi(fbi);
 217                 bfin_t350mcqb_init_timers();
 218
 219                 /* start dma */
 220                 enable_dma(CH_PPI);
 221                 bfin_t350mcqb_enable_ppi();
 222                 bfin_t350mcqb_start_timers();
 223         }
 224
 225         spin_unlock(&fbi->lock);
 226
 227         return 0;
 228 }
 229
 230 static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
 231 {
 232         struct bfin_t350mcqbfb_info *fbi = info->par;
 233
 234         spin_lock(&fbi->lock);
 235
 236         fbi->lq043_open_cnt--;
 237         fbi->lq043_mmap = 0;
 238
 239         if (fbi->lq043_open_cnt <= 0) {
 240                 bfin_t350mcqb_disable_ppi();
 241                 SSYNC();
 242                 disable_dma(CH_PPI);
 243                 bfin_t350mcqb_stop_timers();
 244                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
 245         }
 246
 247         spin_unlock(&fbi->lock);
 248
 249         return 0;
 250 }
 251
 252 static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
 253                                    struct fb_info *info)
 254 {
 255
 256         if (var->bits_per_pixel != LCD_BPP) {
 257                 pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
 258                          var->bits_per_pixel);
 259                 return -EINVAL;
 260         }
 261
 262         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 263             info->var.xres_virtual != var->xres_virtual ||
 264             info->var.yres_virtual != var->yres_virtual) {
 265                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 266                          __FUNCTION__, var->xres, var->yres);
 267                 return -EINVAL;
 268         }
 269
 270         /*
 271          *  Memory limit
 272          */
 273
 274         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 275                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 276                          __FUNCTION__, var->yres_virtual);
 277                 return -ENOMEM;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static int bfin_t350mcqb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 284 {
 285         struct bfin_t350mcqbfb_info *fbi = info->par;
 286
 287         if (fbi->lq043_mmap)
 288                 return -1;
 289
 290         spin_lock(&fbi->lock);
 291         fbi->lq043_mmap = 1;
 292         spin_unlock(&fbi->lock);
 293
 294         vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
 295
 296         vma->vm_end = vma->vm_start + info->fix.smem_len;
 297         /* For those who don't understand how mmap works, go read
 298          *   Documentation/nommu-mmap.txt.
 299          * For those that do, you will know that the VM_MAYSHARE flag
 300          * must be set in the vma->vm_flags structure on noMMU
 301          *   Other flags can be set, and are documented in
 302          *   include/linux/mm.h
 303          */
 304         vma->vm_flags |= VM_MAYSHARE;
 305
 306         return 0;
 307 }
 308
 309 int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 310 {
 311         if (nocursor)
 312                 return 0;
 313         else
 314                 return -EINVAL; /* just to force soft_cursor() call */
 315 }
 316
 317 static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
 318                                    u_int blue, u_int transp,
 319                                    struct fb_info *info)
 320 {
 321         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 322                 return -EINVAL;
 323
 324         if (info->var.grayscale) {
 325                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 326                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 327         }
 328
 329         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 330
 331                 u32 value;
 332                 /* Place color in the pseudopalette */
 333                 if (regno > 16)
 334                         return -EINVAL;
 335
 336                 red >>= (16 - info->var.red.length);
 337                 green >>= (16 - info->var.green.length);
 338                 blue >>= (16 - info->var.blue.length);
 339
 340                 value = (red << info->var.red.offset) |
 341                     (green << info->var.green.offset) |
 342                     (blue << info->var.blue.offset);
 343                 value &= 0xFFFFFF;
 344
 345                 ((u32 *) (info->pseudo_palette))[regno] = value;
 346
 347         }
 348
 349         return 0;
 350 }
 351
 352 static struct fb_ops bfin_t350mcqb_fb_ops = {
 353         .owner = THIS_MODULE,
 354         .fb_open = bfin_t350mcqb_fb_open,
 355         .fb_release = bfin_t350mcqb_fb_release,
 356         .fb_check_var = bfin_t350mcqb_fb_check_var,
 357         .fb_fillrect = cfb_fillrect,
 358         .fb_copyarea = cfb_copyarea,
 359         .fb_imageblit = cfb_imageblit,
 360         .fb_mmap = bfin_t350mcqb_fb_mmap,
 361         .fb_cursor = bfin_t350mcqb_fb_cursor,
 362         .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
 363 };
 364
 365 #ifndef NO_BL_SUPPORT
 366 static int bl_get_brightness(struct backlight_device *bd)
 367 {
 368         return 0;
 369 }
 370
 371 static struct backlight_ops bfin_lq043fb_bl_ops = {
 372         .get_brightness = bl_get_brightness,
 373 };
 374
 375 static struct backlight_device *bl_dev;
 376
 377 static int bfin_lcd_get_power(struct lcd_device *dev)
 378 {
 379         return 0;
 380 }
 381
 382 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 383 {
 384         return 0;
 385 }
 386
 387 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 388 {
 389         return 0;
 390 }
 391
 392 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 393 {
 394
 395         return 0;
 396 }
 397
 398 static int bfin_lcd_check_fb(struct fb_info *fi)
 399 {
 400         if (!fi || (fi == &bfin_t350mcqb_fb))
 401                 return 1;
 402         return 0;
 403 }
 404
 405 static struct lcd_ops bfin_lcd_ops = {
 406         .get_power = bfin_lcd_get_power,
 407         .set_power = bfin_lcd_set_power,
 408         .get_contrast = bfin_lcd_get_contrast,
 409         .set_contrast = bfin_lcd_set_contrast,
 410         .check_fb = bfin_lcd_check_fb,
 411 };
 412
 413 static struct lcd_device *lcd_dev;
 414 #endif
 415
 416 static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
 417 {
 418         /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
 419
 420         u16 status = bfin_read_PPI_STATUS();
 421         bfin_write_PPI_STATUS(0xFFFF);
 422
 423         if (status) {
 424                 bfin_t350mcqb_disable_ppi();
 425                 disable_dma(CH_PPI);
 426
 427                 /* start dma */
 428                 enable_dma(CH_PPI);
 429                 bfin_t350mcqb_enable_ppi();
 430                 bfin_write_PPI_STATUS(0xFFFF);
 431         }
 432
 433         return IRQ_HANDLED;
 434 }
 435
 436 static int __init bfin_t350mcqb_probe(struct platform_device *pdev)
 437 {
 438         struct bfin_t350mcqbfb_info *info;
 439         struct fb_info *fbinfo;
 440         int ret;
 441
 442         printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
 443                                          LCD_X_RES, LCD_Y_RES, LCD_BPP);
 444
 445         if (request_dma(CH_PPI, "CH_PPI") < 0) {
 446                 printk(KERN_ERR DRIVER_NAME
 447                        ": couldn't request CH_PPI DMA\n");
 448                 ret = -EFAULT;
 449                 goto out1;
 450         }
 451
 452         fbinfo =
 453             framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
 454         if (!fbinfo) {
 455                 ret = -ENOMEM;
 456                 goto out2;
 457         }
 458
 459         info = fbinfo->par;
 460         info->fb = fbinfo;
 461         info->dev = &pdev->dev;
 462
 463         platform_set_drvdata(pdev, fbinfo);
 464
 465         strcpy(fbinfo->fix.id, driver_name);
 466
 467         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 468         fbinfo->fix.type_aux = 0;
 469         fbinfo->fix.xpanstep = 0;
 470         fbinfo->fix.ypanstep = 0;
 471         fbinfo->fix.ywrapstep = 0;
 472         fbinfo->fix.accel = FB_ACCEL_NONE;
 473         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 474
 475         fbinfo->var.nonstd = 0;
 476         fbinfo->var.activate = FB_ACTIVATE_NOW;
 477         fbinfo->var.height = -1;
 478         fbinfo->var.width = -1;
 479         fbinfo->var.accel_flags = 0;
 480         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 481
 482         fbinfo->var.xres = LCD_X_RES;
 483         fbinfo->var.xres_virtual = LCD_X_RES;
 484         fbinfo->var.yres = LCD_Y_RES;
 485         fbinfo->var.yres_virtual = LCD_Y_RES;
 486         fbinfo->var.bits_per_pixel = LCD_BPP;
 487
 488         fbinfo->var.red.offset = 0;
 489         fbinfo->var.green.offset = 8;
 490         fbinfo->var.blue.offset = 16;
 491         fbinfo->var.transp.offset = 0;
 492         fbinfo->var.red.length = 8;
 493         fbinfo->var.green.length = 8;
 494         fbinfo->var.blue.length = 8;
 495         fbinfo->var.transp.length = 0;
 496         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
 497
 498         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 499             fbinfo->var.bits_per_pixel / 8;
 500
 501
 502         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 503         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 504
 505         info->fb_buffer =
 506             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 507                                GFP_KERNEL);
 508
 509         if (NULL == info->fb_buffer) {
 510                 printk(KERN_ERR DRIVER_NAME
 511                        ": couldn't allocate dma buffer.\n");
 512                 ret = -ENOMEM;
 513                 goto out3;
 514         }
 515
 516         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
 517
 518         fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 519         fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 520
 521         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 522
 523         fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
 524         if (!fbinfo->pseudo_palette) {
 525                 printk(KERN_ERR DRIVER_NAME
 526                        "Fail to allocate pseudo_palette\n");
 527
 528                 ret = -ENOMEM;
 529                 goto out4;
 530         }
 531
 532         memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
 533
 534         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 535             < 0) {
 536                 printk(KERN_ERR DRIVER_NAME
 537                        "Fail to allocate colormap (%d entries)\n",
 538                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 539                 ret = -EFAULT;
 540                 goto out5;
 541         }
 542
 543         if (bfin_t350mcqb_request_ports(1)) {
 544                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 545                 ret = -EFAULT;
 546                 goto out6;
 547         }
 548
 549         info->irq = platform_get_irq(pdev, 0);
 550         if (info->irq < 0) {
 551                 ret = -EINVAL;
 552                 goto out7;
 553         }
 554
 555         if (request_irq(info->irq, (void *)bfin_t350mcqb_irq_error, IRQF_DISABLED,
 556                         "PPI ERROR", info) < 0) {
 557                 printk(KERN_ERR DRIVER_NAME
 558                        ": unable to request PPI ERROR IRQ\n");
 559                 ret = -EFAULT;
 560                 goto out7;
 561         }
 562
 563         if (register_framebuffer(fbinfo) < 0) {
 564                 printk(KERN_ERR DRIVER_NAME
 565                        ": unable to register framebuffer.\n");
 566                 ret = -EINVAL;
 567                 goto out8;
 568         }
 569 #ifndef NO_BL_SUPPORT
 570         bl_dev =
 571             backlight_device_register("bf52x-bl", NULL, NULL,
 572                                       &bfin_lq043fb_bl_ops);
 573         bl_dev->props.max_brightness = 255;
 574
 575         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 576         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 577 #endif
 578
 579         return 0;
 580
 581 out8:
 582         free_irq(info->irq, info);
 583 out7:
 584         bfin_t350mcqb_request_ports(0);
 585 out6:
 586         fb_dealloc_cmap(&fbinfo->cmap);
 587 out5:
 588         kfree(fbinfo->pseudo_palette);
 589 out4:
 590         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 591                           info->dma_handle);
 592 out3:
 593         framebuffer_release(fbinfo);
 594 out2:
 595         free_dma(CH_PPI);
 596 out1:
 597         platform_set_drvdata(pdev, NULL);
 598
 599         return ret;
 600 }
 601
 602 static int bfin_t350mcqb_remove(struct platform_device *pdev)
 603 {
 604
 605         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 606         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 607
 608         free_dma(CH_PPI);
 609         free_irq(info->irq, info);
 610
 611         if (info->fb_buffer != NULL)
 612                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 613                                   info->dma_handle);
 614
 615         kfree(fbinfo->pseudo_palette);
 616         fb_dealloc_cmap(&fbinfo->cmap);
 617
 618 #ifndef NO_BL_SUPPORT
 619         lcd_device_unregister(lcd_dev);
 620         backlight_device_unregister(bl_dev);
 621 #endif
 622
 623         unregister_framebuffer(fbinfo);
 624
 625         bfin_t350mcqb_request_ports(0);
 626
 627         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 628
 629         return 0;
 630 }
 631
 632 #ifdef CONFIG_PM
 633 static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
 634 {
 635         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 636         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 637
 638         bfin_t350mcqb_disable_ppi();
 639         disable_dma(CH_PPI);
 640         bfin_write_PPI_STATUS(0xFFFF);
 641
 642         return 0;
 643 }
 644
 645 static int bfin_t350mcqb_resume(struct platform_device *pdev)
 646 {
 647         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 648         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 649
 650         enable_dma(CH_PPI);
 651         bfin_t350mcqb_enable_ppi();
 652
 653         return 0;
 654 }
 655 #else
 656 #define bfin_t350mcqb_suspend   NULL
 657 #define bfin_t350mcqb_resume    NULL
 658 #endif
 659
 660 static struct platform_driver bfin_t350mcqb_driver = {
 661         .probe = bfin_t350mcqb_probe,
 662         .remove = bfin_t350mcqb_remove,
 663         .suspend = bfin_t350mcqb_suspend,
 664         .resume = bfin_t350mcqb_resume,
 665         .driver = {
 666                    .name = DRIVER_NAME,
 667                    .owner = THIS_MODULE,
 668                    },
 669 };
 670
 671 static int __devinit bfin_t350mcqb_driver_init(void)
 672 {
 673         return platform_driver_register(&bfin_t350mcqb_driver);
 674 }
 675
 676 static void __exit bfin_t350mcqb_driver_cleanup(void)
 677 {
 678         platform_driver_unregister(&bfin_t350mcqb_driver);
 679 }
 680
 681 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
 682 MODULE_LICENSE("GPL");
 683
 684 module_init(bfin_t350mcqb_driver_init);
 685 module_exit(bfin_t350mcqb_driver_cleanup);