git.oblomov.eu Git - linux-2.6/blob - drivers/video/bfin-t350mcqb-fb.c

   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         u32 pseudo_pal[16];
  95 };
  96
  97 static int nocursor;
  98 module_param(nocursor, int, 0644);
  99 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
 100
 101 #define PPI_TX_MODE             0x2
 102 #define PPI_XFER_TYPE_11        0xC
 103 #define PPI_PORT_CFG_01         0x10
 104 #define PPI_PACK_EN             0x80
 105 #define PPI_POLS_1              0x8000
 106
 107 static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
 108 {
 109         bfin_write_PPI_DELAY(H_START);
 110         bfin_write_PPI_COUNT(H_ACTPIX-1);
 111         bfin_write_PPI_FRAME(V_LINES);
 112
 113         bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
 114                                 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
 115                                 PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
 116                                 PPI_PACK_EN |      /* packing enabled PACK_EN */
 117                                 PPI_POLS_1);       /* faling edge syncs POLS */
 118 }
 119
 120 static inline void bfin_t350mcqb_disable_ppi(void)
 121 {
 122         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 123 }
 124
 125 static inline void bfin_t350mcqb_enable_ppi(void)
 126 {
 127         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 128 }
 129
 130 static void bfin_t350mcqb_start_timers(void)
 131 {
 132         unsigned long flags;
 133
 134         local_irq_save(flags);
 135                 enable_gptimers(TIMER1bit);
 136                 enable_gptimers(TIMER0bit);
 137         local_irq_restore(flags);
 138 }
 139
 140 static void bfin_t350mcqb_stop_timers(void)
 141 {
 142         disable_gptimers(TIMER0bit | TIMER1bit);
 143
 144         set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
 145                                 TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
 146                                  TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);
 147
 148 }
 149
 150 static void bfin_t350mcqb_init_timers(void)
 151 {
 152
 153         bfin_t350mcqb_stop_timers();
 154
 155         set_gptimer_period(TIMER0_id, H_PERIOD);
 156         set_gptimer_pwidth(TIMER0_id, H_PULSE);
 157         set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 158                                       TIMER_TIN_SEL | TIMER_CLK_SEL|
 159                                       TIMER_EMU_RUN);
 160
 161         set_gptimer_period(TIMER1_id, V_PERIOD);
 162         set_gptimer_pwidth(TIMER1_id, V_PULSE);
 163         set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 164                                       TIMER_TIN_SEL | TIMER_CLK_SEL |
 165                                       TIMER_EMU_RUN);
 166
 167 }
 168
 169 static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
 170 {
 171
 172         set_dma_config(CH_PPI,
 173                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
 174                                            INTR_DISABLE, DIMENSION_2D,
 175                                            DATA_SIZE_16,
 176                                            DMA_NOSYNC_KEEP_DMA_BUF));
 177         set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
 178         set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
 179         set_dma_y_count(CH_PPI, V_LINES);
 180
 181         set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
 182         set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
 183
 184 }
 185
 186 static  u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
 187                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
 188                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
 189                             P_PPI0_D6, P_PPI0_D7, 0};
 190
 191 static int bfin_t350mcqb_request_ports(int action)
 192 {
 193         if (action) {
 194                 if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {
 195                         printk(KERN_ERR "Requesting Peripherals faild\n");
 196                         return -EFAULT;
 197                 }
 198         } else
 199                 peripheral_free_list(ppi0_req_8);
 200
 201         return 0;
 202 }
 203
 204 static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
 205 {
 206         struct bfin_t350mcqbfb_info *fbi = info->par;
 207
 208         spin_lock(&fbi->lock);
 209         fbi->lq043_open_cnt++;
 210
 211         if (fbi->lq043_open_cnt <= 1) {
 212
 213                 bfin_t350mcqb_disable_ppi();
 214                 SSYNC();
 215
 216                 bfin_t350mcqb_config_dma(fbi);
 217                 bfin_t350mcqb_config_ppi(fbi);
 218                 bfin_t350mcqb_init_timers();
 219
 220                 /* start dma */
 221                 enable_dma(CH_PPI);
 222                 bfin_t350mcqb_enable_ppi();
 223                 bfin_t350mcqb_start_timers();
 224         }
 225
 226         spin_unlock(&fbi->lock);
 227
 228         return 0;
 229 }
 230
 231 static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
 232 {
 233         struct bfin_t350mcqbfb_info *fbi = info->par;
 234
 235         spin_lock(&fbi->lock);
 236
 237         fbi->lq043_open_cnt--;
 238         fbi->lq043_mmap = 0;
 239
 240         if (fbi->lq043_open_cnt <= 0) {
 241                 bfin_t350mcqb_disable_ppi();
 242                 SSYNC();
 243                 disable_dma(CH_PPI);
 244                 bfin_t350mcqb_stop_timers();
 245                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
 246         }
 247
 248         spin_unlock(&fbi->lock);
 249
 250         return 0;
 251 }
 252
 253 static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
 254                                    struct fb_info *info)
 255 {
 256
 257         switch (var->bits_per_pixel) {
 258         case 24:/* TRUECOLOUR, 16m */
 259                 var->red.offset = 0;
 260                 var->green.offset = 8;
 261                 var->blue.offset = 16;
 262                 var->red.length = var->green.length = var->blue.length = 8;
 263                 var->transp.offset = 0;
 264                 var->transp.length = 0;
 265                 var->transp.msb_right = 0;
 266                 var->red.msb_right = 0;
 267                 var->green.msb_right = 0;
 268                 var->blue.msb_right = 0;
 269                 break;
 270         default:
 271                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 272                          var->bits_per_pixel);
 273                 return -EINVAL;
 274         }
 275
 276         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 277             info->var.xres_virtual != var->xres_virtual ||
 278             info->var.yres_virtual != var->yres_virtual) {
 279                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 280                          __func__, var->xres, var->yres);
 281                 return -EINVAL;
 282         }
 283
 284         /*
 285          *  Memory limit
 286          */
 287
 288         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 289                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 290                          __func__, var->yres_virtual);
 291                 return -ENOMEM;
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int bfin_t350mcqb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 298 {
 299         struct bfin_t350mcqbfb_info *fbi = info->par;
 300
 301         if (fbi->lq043_mmap)
 302                 return -1;
 303
 304         spin_lock(&fbi->lock);
 305         fbi->lq043_mmap = 1;
 306         spin_unlock(&fbi->lock);
 307
 308         vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
 309
 310         vma->vm_end = vma->vm_start + info->fix.smem_len;
 311         /* For those who don't understand how mmap works, go read
 312          *   Documentation/nommu-mmap.txt.
 313          * For those that do, you will know that the VM_MAYSHARE flag
 314          * must be set in the vma->vm_flags structure on noMMU
 315          *   Other flags can be set, and are documented in
 316          *   include/linux/mm.h
 317          */
 318         vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
 319
 320         return 0;
 321 }
 322
 323 int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 324 {
 325         if (nocursor)
 326                 return 0;
 327         else
 328                 return -EINVAL; /* just to force soft_cursor() call */
 329 }
 330
 331 static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
 332                                    u_int blue, u_int transp,
 333                                    struct fb_info *info)
 334 {
 335         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 336                 return -EINVAL;
 337
 338         if (info->var.grayscale) {
 339                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 340                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 341         }
 342
 343         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 344
 345                 u32 value;
 346                 /* Place color in the pseudopalette */
 347                 if (regno > 16)
 348                         return -EINVAL;
 349
 350                 red >>= (16 - info->var.red.length);
 351                 green >>= (16 - info->var.green.length);
 352                 blue >>= (16 - info->var.blue.length);
 353
 354                 value = (red << info->var.red.offset) |
 355                     (green << info->var.green.offset) |
 356                     (blue << info->var.blue.offset);
 357                 value &= 0xFFFFFF;
 358
 359                 ((u32 *) (info->pseudo_palette))[regno] = value;
 360
 361         }
 362
 363         return 0;
 364 }
 365
 366 static struct fb_ops bfin_t350mcqb_fb_ops = {
 367         .owner = THIS_MODULE,
 368         .fb_open = bfin_t350mcqb_fb_open,
 369         .fb_release = bfin_t350mcqb_fb_release,
 370         .fb_check_var = bfin_t350mcqb_fb_check_var,
 371         .fb_fillrect = cfb_fillrect,
 372         .fb_copyarea = cfb_copyarea,
 373         .fb_imageblit = cfb_imageblit,
 374         .fb_mmap = bfin_t350mcqb_fb_mmap,
 375         .fb_cursor = bfin_t350mcqb_fb_cursor,
 376         .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
 377 };
 378
 379 #ifndef NO_BL_SUPPORT
 380 static int bl_get_brightness(struct backlight_device *bd)
 381 {
 382         return 0;
 383 }
 384
 385 static struct backlight_ops bfin_lq043fb_bl_ops = {
 386         .get_brightness = bl_get_brightness,
 387 };
 388
 389 static struct backlight_device *bl_dev;
 390
 391 static int bfin_lcd_get_power(struct lcd_device *dev)
 392 {
 393         return 0;
 394 }
 395
 396 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 397 {
 398         return 0;
 399 }
 400
 401 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 402 {
 403         return 0;
 404 }
 405
 406 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 407 {
 408
 409         return 0;
 410 }
 411
 412 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
 413 {
 414         if (!fi || (fi == &bfin_t350mcqb_fb))
 415                 return 1;
 416         return 0;
 417 }
 418
 419 static struct lcd_ops bfin_lcd_ops = {
 420         .get_power = bfin_lcd_get_power,
 421         .set_power = bfin_lcd_set_power,
 422         .get_contrast = bfin_lcd_get_contrast,
 423         .set_contrast = bfin_lcd_set_contrast,
 424         .check_fb = bfin_lcd_check_fb,
 425 };
 426
 427 static struct lcd_device *lcd_dev;
 428 #endif
 429
 430 static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
 431 {
 432         /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
 433
 434         u16 status = bfin_read_PPI_STATUS();
 435         bfin_write_PPI_STATUS(0xFFFF);
 436
 437         if (status) {
 438                 bfin_t350mcqb_disable_ppi();
 439                 disable_dma(CH_PPI);
 440
 441                 /* start dma */
 442                 enable_dma(CH_PPI);
 443                 bfin_t350mcqb_enable_ppi();
 444                 bfin_write_PPI_STATUS(0xFFFF);
 445         }
 446
 447         return IRQ_HANDLED;
 448 }
 449
 450 static int __init bfin_t350mcqb_probe(struct platform_device *pdev)
 451 {
 452         struct bfin_t350mcqbfb_info *info;
 453         struct fb_info *fbinfo;
 454         int ret;
 455
 456         printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
 457                                          LCD_X_RES, LCD_Y_RES, LCD_BPP);
 458
 459         if (request_dma(CH_PPI, "CH_PPI") < 0) {
 460                 printk(KERN_ERR DRIVER_NAME
 461                        ": couldn't request CH_PPI DMA\n");
 462                 ret = -EFAULT;
 463                 goto out1;
 464         }
 465
 466         fbinfo =
 467             framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
 468         if (!fbinfo) {
 469                 ret = -ENOMEM;
 470                 goto out2;
 471         }
 472
 473         info = fbinfo->par;
 474         info->fb = fbinfo;
 475         info->dev = &pdev->dev;
 476
 477         platform_set_drvdata(pdev, fbinfo);
 478
 479         strcpy(fbinfo->fix.id, driver_name);
 480
 481         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 482         fbinfo->fix.type_aux = 0;
 483         fbinfo->fix.xpanstep = 0;
 484         fbinfo->fix.ypanstep = 0;
 485         fbinfo->fix.ywrapstep = 0;
 486         fbinfo->fix.accel = FB_ACCEL_NONE;
 487         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 488
 489         fbinfo->var.nonstd = 0;
 490         fbinfo->var.activate = FB_ACTIVATE_NOW;
 491         fbinfo->var.height = -1;
 492         fbinfo->var.width = -1;
 493         fbinfo->var.accel_flags = 0;
 494         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 495
 496         fbinfo->var.xres = LCD_X_RES;
 497         fbinfo->var.xres_virtual = LCD_X_RES;
 498         fbinfo->var.yres = LCD_Y_RES;
 499         fbinfo->var.yres_virtual = LCD_Y_RES;
 500         fbinfo->var.bits_per_pixel = LCD_BPP;
 501
 502         fbinfo->var.red.offset = 0;
 503         fbinfo->var.green.offset = 8;
 504         fbinfo->var.blue.offset = 16;
 505         fbinfo->var.transp.offset = 0;
 506         fbinfo->var.red.length = 8;
 507         fbinfo->var.green.length = 8;
 508         fbinfo->var.blue.length = 8;
 509         fbinfo->var.transp.length = 0;
 510         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
 511
 512         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 513             fbinfo->var.bits_per_pixel / 8;
 514
 515
 516         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 517         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 518
 519         info->fb_buffer =
 520             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 521                                GFP_KERNEL);
 522
 523         if (NULL == info->fb_buffer) {
 524                 printk(KERN_ERR DRIVER_NAME
 525                        ": couldn't allocate dma buffer.\n");
 526                 ret = -ENOMEM;
 527                 goto out3;
 528         }
 529
 530         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
 531
 532         fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 533         fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 534
 535         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 536
 537         fbinfo->pseudo_palette = &info->pseudo_pal;
 538
 539         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 540             < 0) {
 541                 printk(KERN_ERR DRIVER_NAME
 542                        "Fail to allocate colormap (%d entries)\n",
 543                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 544                 ret = -EFAULT;
 545                 goto out4;
 546         }
 547
 548         if (bfin_t350mcqb_request_ports(1)) {
 549                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 550                 ret = -EFAULT;
 551                 goto out6;
 552         }
 553
 554         info->irq = platform_get_irq(pdev, 0);
 555         if (info->irq < 0) {
 556                 ret = -EINVAL;
 557                 goto out7;
 558         }
 559
 560         ret = request_irq(info->irq, bfin_t350mcqb_irq_error, IRQF_DISABLED,
 561                         "PPI ERROR", info);
 562         if (ret < 0) {
 563                 printk(KERN_ERR DRIVER_NAME
 564                        ": unable to request PPI ERROR IRQ\n");
 565                 goto out7;
 566         }
 567
 568         if (register_framebuffer(fbinfo) < 0) {
 569                 printk(KERN_ERR DRIVER_NAME
 570                        ": unable to register framebuffer.\n");
 571                 ret = -EINVAL;
 572                 goto out8;
 573         }
 574 #ifndef NO_BL_SUPPORT
 575         bl_dev =
 576             backlight_device_register("bf52x-bl", NULL, NULL,
 577                                       &bfin_lq043fb_bl_ops);
 578         bl_dev->props.max_brightness = 255;
 579
 580         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 581         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 582 #endif
 583
 584         return 0;
 585
 586 out8:
 587         free_irq(info->irq, info);
 588 out7:
 589         bfin_t350mcqb_request_ports(0);
 590 out6:
 591         fb_dealloc_cmap(&fbinfo->cmap);
 592 out4:
 593         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 594                           info->dma_handle);
 595 out3:
 596         framebuffer_release(fbinfo);
 597 out2:
 598         free_dma(CH_PPI);
 599 out1:
 600         platform_set_drvdata(pdev, NULL);
 601
 602         return ret;
 603 }
 604
 605 static int bfin_t350mcqb_remove(struct platform_device *pdev)
 606 {
 607
 608         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 609         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 610
 611         unregister_framebuffer(fbinfo);
 612
 613         free_dma(CH_PPI);
 614         free_irq(info->irq, info);
 615
 616         if (info->fb_buffer != NULL)
 617                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 618                                   info->dma_handle);
 619
 620         fb_dealloc_cmap(&fbinfo->cmap);
 621
 622 #ifndef NO_BL_SUPPORT
 623         lcd_device_unregister(lcd_dev);
 624         backlight_device_unregister(bl_dev);
 625 #endif
 626
 627         bfin_t350mcqb_request_ports(0);
 628
 629         platform_set_drvdata(pdev, NULL);
 630         framebuffer_release(fbinfo);
 631
 632         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 633
 634         return 0;
 635 }
 636
 637 #ifdef CONFIG_PM
 638 static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
 639 {
 640         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 641         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 642
 643         bfin_t350mcqb_disable_ppi();
 644         disable_dma(CH_PPI);
 645         bfin_write_PPI_STATUS(0xFFFF);
 646
 647         return 0;
 648 }
 649
 650 static int bfin_t350mcqb_resume(struct platform_device *pdev)
 651 {
 652         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 653         struct bfin_t350mcqbfb_info *info = fbinfo->par;
 654
 655         enable_dma(CH_PPI);
 656         bfin_t350mcqb_enable_ppi();
 657
 658         return 0;
 659 }
 660 #else
 661 #define bfin_t350mcqb_suspend   NULL
 662 #define bfin_t350mcqb_resume    NULL
 663 #endif
 664
 665 static struct platform_driver bfin_t350mcqb_driver = {
 666         .probe = bfin_t350mcqb_probe,
 667         .remove = bfin_t350mcqb_remove,
 668         .suspend = bfin_t350mcqb_suspend,
 669         .resume = bfin_t350mcqb_resume,
 670         .driver = {
 671                    .name = DRIVER_NAME,
 672                    .owner = THIS_MODULE,
 673                    },
 674 };
 675
 676 static int __devinit bfin_t350mcqb_driver_init(void)
 677 {
 678         return platform_driver_register(&bfin_t350mcqb_driver);
 679 }
 680
 681 static void __exit bfin_t350mcqb_driver_cleanup(void)
 682 {
 683         platform_driver_unregister(&bfin_t350mcqb_driver);
 684 }
 685
 686 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
 687 MODULE_LICENSE("GPL");
 688
 689 module_init(bfin_t350mcqb_driver_init);
 690 module_exit(bfin_t350mcqb_driver_cleanup);