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         }
 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         switch (var->bits_per_pixel) {
 257         case 24:/* TRUECOLOUR, 16m */
 258                 var->red.offset = 0;
 259                 var->green.offset = 8;
 260                 var->blue.offset = 16;
 261                 var->red.length = var->green.length = var->blue.length = 8;
 262                 var->transp.offset = 0;
 263                 var->transp.length = 0;
 264                 var->transp.msb_right = 0;
 265                 var->red.msb_right = 0;
 266                 var->green.msb_right = 0;
 267                 var->blue.msb_right = 0;
 268                 break;
 269         default:
 270                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 271                          var->bits_per_pixel);
 272                 return -EINVAL;
 273         }
 274
 275         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 276             info->var.xres_virtual != var->xres_virtual ||
 277             info->var.yres_virtual != var->yres_virtual) {
 278                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 279                          __func__, var->xres, var->yres);
 280                 return -EINVAL;
 281         }
 282
 283         /*
 284          *  Memory limit
 285          */
 286
 287         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 288                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 289                          __func__, var->yres_virtual);
 290                 return -ENOMEM;
 291         }
 292
 293         return 0;
 294 }
 295
 296 static int bfin_t350mcqb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 297 {
 298         struct bfin_t350mcqbfb_info *fbi = info->par;
 299
 300         if (fbi->lq043_mmap)
 301                 return -1;
 302
 303         spin_lock(&fbi->lock);
 304         fbi->lq043_mmap = 1;
 305         spin_unlock(&fbi->lock);
 306
 307         vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
 308
 309         vma->vm_end = vma->vm_start + info->fix.smem_len;
 310         /* For those who don't understand how mmap works, go read
 311          *   Documentation/nommu-mmap.txt.
 312          * For those that do, you will know that the VM_MAYSHARE flag
 313          * must be set in the vma->vm_flags structure on noMMU
 314          *   Other flags can be set, and are documented in
 315          *   include/linux/mm.h
 316          */
 317         vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
 318
 319         return 0;
 320 }
 321
 322 int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 323 {
 324         if (nocursor)
 325                 return 0;
 326         else
 327                 return -EINVAL; /* just to force soft_cursor() call */
 328 }
 329
 330 static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
 331                                    u_int blue, u_int transp,
 332                                    struct fb_info *info)
 333 {
 334         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 335                 return -EINVAL;
 336
 337         if (info->var.grayscale) {
 338                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 339                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 340         }
 341
 342         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 343
 344                 u32 value;
 345                 /* Place color in the pseudopalette */
 346                 if (regno > 16)
 347                         return -EINVAL;
 348
 349                 red >>= (16 - info->var.red.length);
 350                 green >>= (16 - info->var.green.length);
 351                 blue >>= (16 - info->var.blue.length);
 352
 353                 value = (red << info->var.red.offset) |
 354                     (green << info->var.green.offset) |
 355                     (blue << info->var.blue.offset);
 356                 value &= 0xFFFFFF;
 357
 358                 ((u32 *) (info->pseudo_palette))[regno] = value;
 359
 360         }
 361
 362         return 0;
 363 }
 364
 365 static struct fb_ops bfin_t350mcqb_fb_ops = {
 366         .owner = THIS_MODULE,
 367         .fb_open = bfin_t350mcqb_fb_open,
 368         .fb_release = bfin_t350mcqb_fb_release,
 369         .fb_check_var = bfin_t350mcqb_fb_check_var,
 370         .fb_fillrect = cfb_fillrect,
 371         .fb_copyarea = cfb_copyarea,
 372         .fb_imageblit = cfb_imageblit,
 373         .fb_mmap = bfin_t350mcqb_fb_mmap,
 374         .fb_cursor = bfin_t350mcqb_fb_cursor,
 375         .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
 376 };
 377
 378 #ifndef NO_BL_SUPPORT
 379 static int bl_get_brightness(struct backlight_device *bd)
 380 {
 381         return 0;
 382 }
 383
 384 static struct backlight_ops bfin_lq043fb_bl_ops = {
 385         .get_brightness = bl_get_brightness,
 386 };
 387
 388 static struct backlight_device *bl_dev;
 389
 390 static int bfin_lcd_get_power(struct lcd_device *dev)
 391 {
 392         return 0;
 393 }
 394
 395 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 396 {
 397         return 0;
 398 }
 399
 400 static int bfin_lcd_get_contrast(struct lcd_device *dev)
 401 {
 402         return 0;
 403 }
 404
 405 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 406 {
 407
 408         return 0;
 409 }
 410
 411 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
 412 {
 413         if (!fi || (fi == &bfin_t350mcqb_fb))
 414                 return 1;
 415         return 0;
 416 }
 417
 418 static struct lcd_ops bfin_lcd_ops = {
 419         .get_power = bfin_lcd_get_power,
 420         .set_power = bfin_lcd_set_power,
 421         .get_contrast = bfin_lcd_get_contrast,
 422         .set_contrast = bfin_lcd_set_contrast,
 423         .check_fb = bfin_lcd_check_fb,
 424 };
 425
 426 static struct lcd_device *lcd_dev;
 427 #endif
 428
 429 static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
 430 {
 431         /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
 432
 433         u16 status = bfin_read_PPI_STATUS();
 434         bfin_write_PPI_STATUS(0xFFFF);
 435
 436         if (status) {
 437                 bfin_t350mcqb_disable_ppi();
 438                 disable_dma(CH_PPI);
 439
 440                 /* start dma */
 441                 enable_dma(CH_PPI);
 442                 bfin_t350mcqb_enable_ppi();
 443                 bfin_write_PPI_STATUS(0xFFFF);
 444         }
 445
 446         return IRQ_HANDLED;
 447 }
 448
 449 static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev)
 450 {
 451         struct bfin_t350mcqbfb_info *info;
 452         struct fb_info *fbinfo;
 453         int ret;
 454
 455         printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
 456                                          LCD_X_RES, LCD_Y_RES, LCD_BPP);
 457
 458         if (request_dma(CH_PPI, "CH_PPI") < 0) {
 459                 printk(KERN_ERR DRIVER_NAME
 460                        ": couldn't request CH_PPI DMA\n");
 461                 ret = -EFAULT;
 462                 goto out1;
 463         }
 464
 465         fbinfo =
 466             framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
 467         if (!fbinfo) {
 468                 ret = -ENOMEM;
 469                 goto out2;
 470         }
 471
 472         info = fbinfo->par;
 473         info->fb = fbinfo;
 474         info->dev = &pdev->dev;
 475
 476         platform_set_drvdata(pdev, fbinfo);
 477
 478         strcpy(fbinfo->fix.id, driver_name);
 479
 480         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 481         fbinfo->fix.type_aux = 0;
 482         fbinfo->fix.xpanstep = 0;
 483         fbinfo->fix.ypanstep = 0;
 484         fbinfo->fix.ywrapstep = 0;
 485         fbinfo->fix.accel = FB_ACCEL_NONE;
 486         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 487
 488         fbinfo->var.nonstd = 0;
 489         fbinfo->var.activate = FB_ACTIVATE_NOW;
 490         fbinfo->var.height = 53;
 491         fbinfo->var.width = 70;
 492         fbinfo->var.accel_flags = 0;
 493         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 494
 495         fbinfo->var.xres = LCD_X_RES;
 496         fbinfo->var.xres_virtual = LCD_X_RES;
 497         fbinfo->var.yres = LCD_Y_RES;
 498         fbinfo->var.yres_virtual = LCD_Y_RES;
 499         fbinfo->var.bits_per_pixel = LCD_BPP;
 500
 501         fbinfo->var.red.offset = 0;
 502         fbinfo->var.green.offset = 8;
 503         fbinfo->var.blue.offset = 16;
 504         fbinfo->var.transp.offset = 0;
 505         fbinfo->var.red.length = 8;
 506         fbinfo->var.green.length = 8;
 507         fbinfo->var.blue.length = 8;
 508         fbinfo->var.transp.length = 0;
 509         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
 510
 511         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 512             fbinfo->var.bits_per_pixel / 8;
 513
 514
 515         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 516         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 517
 518         info->fb_buffer =
 519             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 520                                GFP_KERNEL);
 521
 522         if (NULL == info->fb_buffer) {
 523                 printk(KERN_ERR DRIVER_NAME
 524                        ": couldn't allocate dma buffer.\n");
 525                 ret = -ENOMEM;
 526                 goto out3;
 527         }
 528
 529         fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 530         fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 531
 532         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 533
 534         fbinfo->pseudo_palette = &info->pseudo_pal;
 535
 536         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 537             < 0) {
 538                 printk(KERN_ERR DRIVER_NAME
 539                        "Fail to allocate colormap (%d entries)\n",
 540                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 541                 ret = -EFAULT;
 542                 goto out4;
 543         }
 544
 545         if (bfin_t350mcqb_request_ports(1)) {
 546                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 547                 ret = -EFAULT;
 548                 goto out6;
 549         }
 550
 551         info->irq = platform_get_irq(pdev, 0);
 552         if (info->irq < 0) {
 553                 ret = -EINVAL;
 554                 goto out7;
 555         }
 556
 557         ret = request_irq(info->irq, bfin_t350mcqb_irq_error, IRQF_DISABLED,
 558                         "PPI ERROR", info);
 559         if (ret < 0) {
 560                 printk(KERN_ERR DRIVER_NAME
 561                        ": unable to request PPI ERROR IRQ\n");
 562                 goto out7;
 563         }
 564
 565         if (register_framebuffer(fbinfo) < 0) {
 566                 printk(KERN_ERR DRIVER_NAME
 567                        ": unable to register framebuffer.\n");
 568                 ret = -EINVAL;
 569                 goto out8;
 570         }
 571 #ifndef NO_BL_SUPPORT
 572         bl_dev =
 573             backlight_device_register("bf52x-bl", NULL, NULL,
 574                                       &bfin_lq043fb_bl_ops);
 575         bl_dev->props.max_brightness = 255;
 576
 577         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 578         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 579 #endif
 580
 581         return 0;
 582
 583 out8:
 584         free_irq(info->irq, info);
 585 out7:
 586         bfin_t350mcqb_request_ports(0);
 587 out6:
 588         fb_dealloc_cmap(&fbinfo->cmap);
 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 __devexit 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         unregister_framebuffer(fbinfo);
 609
 610         free_dma(CH_PPI);
 611         free_irq(info->irq, info);
 612
 613         if (info->fb_buffer != NULL)
 614                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 615                                   info->dma_handle);
 616
 617         fb_dealloc_cmap(&fbinfo->cmap);
 618
 619 #ifndef NO_BL_SUPPORT
 620         lcd_device_unregister(lcd_dev);
 621         backlight_device_unregister(bl_dev);
 622 #endif
 623
 624         bfin_t350mcqb_request_ports(0);
 625
 626         platform_set_drvdata(pdev, NULL);
 627         framebuffer_release(fbinfo);
 628
 629         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 630
 631         return 0;
 632 }
 633
 634 #ifdef CONFIG_PM
 635 static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
 636 {
 637         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 638         struct bfin_t350mcqbfb_info *fbi = fbinfo->par;
 639
 640         if (fbi->lq043_open_cnt) {
 641                 bfin_t350mcqb_disable_ppi();
 642                 disable_dma(CH_PPI);
 643                 bfin_t350mcqb_stop_timers();
 644                 bfin_write_PPI_STATUS(-1);
 645         }
 646
 647
 648         return 0;
 649 }
 650
 651 static int bfin_t350mcqb_resume(struct platform_device *pdev)
 652 {
 653         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 654         struct bfin_t350mcqbfb_info *fbi = fbinfo->par;
 655
 656         if (fbi->lq043_open_cnt) {
 657                 bfin_t350mcqb_config_dma(fbi);
 658                 bfin_t350mcqb_config_ppi(fbi);
 659                 bfin_t350mcqb_init_timers();
 660
 661                 /* start dma */
 662                 enable_dma(CH_PPI);
 663                 bfin_t350mcqb_enable_ppi();
 664                 bfin_t350mcqb_start_timers();
 665         }
 666
 667         return 0;
 668 }
 669 #else
 670 #define bfin_t350mcqb_suspend   NULL
 671 #define bfin_t350mcqb_resume    NULL
 672 #endif
 673
 674 static struct platform_driver bfin_t350mcqb_driver = {
 675         .probe = bfin_t350mcqb_probe,
 676         .remove = __devexit_p(bfin_t350mcqb_remove),
 677         .suspend = bfin_t350mcqb_suspend,
 678         .resume = bfin_t350mcqb_resume,
 679         .driver = {
 680                    .name = DRIVER_NAME,
 681                    .owner = THIS_MODULE,
 682                    },
 683 };
 684
 685 static int __init bfin_t350mcqb_driver_init(void)
 686 {
 687         return platform_driver_register(&bfin_t350mcqb_driver);
 688 }
 689
 690 static void __exit bfin_t350mcqb_driver_cleanup(void)
 691 {
 692         platform_driver_unregister(&bfin_t350mcqb_driver);
 693 }
 694
 695 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
 696 MODULE_LICENSE("GPL");
 697
 698 module_init(bfin_t350mcqb_driver_init);
 699 module_exit(bfin_t350mcqb_driver_cleanup);