linux/drivers/video/bfin-t350mcqb-fb.c
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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 Framebuffer 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/gfp.h>
  36#include <linux/fb.h>
  37#include <linux/init.h>
  38#include <linux/types.h>
  39#include <linux/interrupt.h>
  40#include <linux/device.h>
  41#include <linux/backlight.h>
  42#include <linux/lcd.h>
  43#include <linux/dma-mapping.h>
  44#include <linux/platform_device.h>
  45
  46#include <asm/blackfin.h>
  47#include <asm/irq.h>
  48#include <asm/dma-mapping.h>
  49#include <asm/dma.h>
  50#include <asm/portmux.h>
  51#include <asm/gptimers.h>
  52
  53#define NO_BL_SUPPORT
  54
  55#define LCD_X_RES               320     /* Horizontal Resolution */
  56#define LCD_Y_RES               240     /* Vertical Resolution */
  57#define LCD_BPP                 24      /* Bit Per Pixel */
  58
  59#define DMA_BUS_SIZE            16
  60#define LCD_CLK                 (12*1000*1000)  /* 12MHz */
  61
  62#define CLOCKS_PER_PIX          3
  63
  64        /*
  65         * HS and VS timing parameters (all in number of PPI clk ticks)
  66         */
  67
  68#define U_LINE          1                               /* Blanking Lines */
  69
  70#define H_ACTPIX        (LCD_X_RES * CLOCKS_PER_PIX)    /* active horizontal pixel */
  71#define H_PERIOD        (408 * CLOCKS_PER_PIX)          /* HS period */
  72#define H_PULSE         90                              /* HS pulse width */
  73#define H_START         204                             /* first valid pixel */
  74
  75#define V_LINES         (LCD_Y_RES + U_LINE)            /* total vertical lines */
  76#define V_PULSE         (3 * H_PERIOD)                  /* VS pulse width (1-5 H_PERIODs) */
  77#define V_PERIOD        (H_PERIOD * V_LINES)            /* VS period */
  78
  79#define ACTIVE_VIDEO_MEM_OFFSET (U_LINE * H_ACTPIX)
  80
  81#define BFIN_LCD_NBR_PALETTE_ENTRIES    256
  82
  83#define DRIVER_NAME "bfin-t350mcqb"
  84static char driver_name[] = DRIVER_NAME;
  85
  86struct bfin_t350mcqbfb_info {
  87        struct fb_info *fb;
  88        struct device *dev;
  89        unsigned char *fb_buffer;       /* RGB Buffer */
  90        dma_addr_t dma_handle;
  91        int lq043_open_cnt;
  92        int irq;
  93        spinlock_t lock;        /* lock */
  94        u32 pseudo_pal[16];
  95};
  96
  97static int nocursor;
  98module_param(nocursor, int, 0644);
  99MODULE_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
 107static 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
 120static inline void bfin_t350mcqb_disable_ppi(void)
 121{
 122        bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 123}
 124
 125static inline void bfin_t350mcqb_enable_ppi(void)
 126{
 127        bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 128}
 129
 130static 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
 140static 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
 150static 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
 169static 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
 186static  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
 191static 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 failed\n");
 196                        return -EFAULT;
 197                }
 198        } else
 199                peripheral_free_list(ppi0_req_8);
 200
 201        return 0;
 202}
 203
 204static 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
 231static 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
 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        }
 245
 246        spin_unlock(&fbi->lock);
 247
 248        return 0;
 249}
 250
 251static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
 252                                   struct fb_info *info)
 253{
 254
 255        switch (var->bits_per_pixel) {
 256        case 24:/* TRUECOLOUR, 16m */
 257                var->red.offset = 0;
 258                var->green.offset = 8;
 259                var->blue.offset = 16;
 260                var->red.length = var->green.length = var->blue.length = 8;
 261                var->transp.offset = 0;
 262                var->transp.length = 0;
 263                var->transp.msb_right = 0;
 264                var->red.msb_right = 0;
 265                var->green.msb_right = 0;
 266                var->blue.msb_right = 0;
 267                break;
 268        default:
 269                pr_debug("%s: depth not supported: %u BPP\n", __func__,
 270                         var->bits_per_pixel);
 271                return -EINVAL;
 272        }
 273
 274        if (info->var.xres != var->xres || info->var.yres != var->yres ||
 275            info->var.xres_virtual != var->xres_virtual ||
 276            info->var.yres_virtual != var->yres_virtual) {
 277                pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 278                         __func__, var->xres, var->yres);
 279                return -EINVAL;
 280        }
 281
 282        /*
 283         *  Memory limit
 284         */
 285
 286        if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 287                pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 288                         __func__, var->yres_virtual);
 289                return -ENOMEM;
 290        }
 291
 292        return 0;
 293}
 294
 295int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 296{
 297        if (nocursor)
 298                return 0;
 299        else
 300                return -EINVAL; /* just to force soft_cursor() call */
 301}
 302
 303static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
 304                                   u_int blue, u_int transp,
 305                                   struct fb_info *info)
 306{
 307        if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 308                return -EINVAL;
 309
 310        if (info->var.grayscale) {
 311                /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 312                red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 313        }
 314
 315        if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 316
 317                u32 value;
 318                /* Place color in the pseudopalette */
 319                if (regno > 16)
 320                        return -EINVAL;
 321
 322                red >>= (16 - info->var.red.length);
 323                green >>= (16 - info->var.green.length);
 324                blue >>= (16 - info->var.blue.length);
 325
 326                value = (red << info->var.red.offset) |
 327                    (green << info->var.green.offset) |
 328                    (blue << info->var.blue.offset);
 329                value &= 0xFFFFFF;
 330
 331                ((u32 *) (info->pseudo_palette))[regno] = value;
 332
 333        }
 334
 335        return 0;
 336}
 337
 338static struct fb_ops bfin_t350mcqb_fb_ops = {
 339        .owner = THIS_MODULE,
 340        .fb_open = bfin_t350mcqb_fb_open,
 341        .fb_release = bfin_t350mcqb_fb_release,
 342        .fb_check_var = bfin_t350mcqb_fb_check_var,
 343        .fb_fillrect = cfb_fillrect,
 344        .fb_copyarea = cfb_copyarea,
 345        .fb_imageblit = cfb_imageblit,
 346        .fb_cursor = bfin_t350mcqb_fb_cursor,
 347        .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
 348};
 349
 350#ifndef NO_BL_SUPPORT
 351static int bl_get_brightness(struct backlight_device *bd)
 352{
 353        return 0;
 354}
 355
 356static const struct backlight_ops bfin_lq043fb_bl_ops = {
 357        .get_brightness = bl_get_brightness,
 358};
 359
 360static struct backlight_device *bl_dev;
 361
 362static int bfin_lcd_get_power(struct lcd_device *dev)
 363{
 364        return 0;
 365}
 366
 367static int bfin_lcd_set_power(struct lcd_device *dev, int power)
 368{
 369        return 0;
 370}
 371
 372static int bfin_lcd_get_contrast(struct lcd_device *dev)
 373{
 374        return 0;
 375}
 376
 377static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
 378{
 379
 380        return 0;
 381}
 382
 383static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
 384{
 385        if (!fi || (fi == &bfin_t350mcqb_fb))
 386                return 1;
 387        return 0;
 388}
 389
 390static struct lcd_ops bfin_lcd_ops = {
 391        .get_power = bfin_lcd_get_power,
 392        .set_power = bfin_lcd_set_power,
 393        .get_contrast = bfin_lcd_get_contrast,
 394        .set_contrast = bfin_lcd_set_contrast,
 395        .check_fb = bfin_lcd_check_fb,
 396};
 397
 398static struct lcd_device *lcd_dev;
 399#endif
 400
 401static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
 402{
 403        /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
 404
 405        u16 status = bfin_read_PPI_STATUS();
 406        bfin_write_PPI_STATUS(0xFFFF);
 407
 408        if (status) {
 409                bfin_t350mcqb_disable_ppi();
 410                disable_dma(CH_PPI);
 411
 412                /* start dma */
 413                enable_dma(CH_PPI);
 414                bfin_t350mcqb_enable_ppi();
 415                bfin_write_PPI_STATUS(0xFFFF);
 416        }
 417
 418        return IRQ_HANDLED;
 419}
 420
 421static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev)
 422{
 423#ifndef NO_BL_SUPPORT
 424        struct backlight_properties props;
 425#endif
 426        struct bfin_t350mcqbfb_info *info;
 427        struct fb_info *fbinfo;
 428        int ret;
 429
 430        printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
 431                                         LCD_X_RES, LCD_Y_RES, LCD_BPP);
 432
 433        if (request_dma(CH_PPI, "CH_PPI") < 0) {
 434                printk(KERN_ERR DRIVER_NAME
 435                       ": couldn't request CH_PPI DMA\n");
 436                ret = -EFAULT;
 437                goto out1;
 438        }
 439
 440        fbinfo =
 441            framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
 442        if (!fbinfo) {
 443                ret = -ENOMEM;
 444                goto out2;
 445        }
 446
 447        info = fbinfo->par;
 448        info->fb = fbinfo;
 449        info->dev = &pdev->dev;
 450
 451        platform_set_drvdata(pdev, fbinfo);
 452
 453        strcpy(fbinfo->fix.id, driver_name);
 454
 455        fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 456        fbinfo->fix.type_aux = 0;
 457        fbinfo->fix.xpanstep = 0;
 458        fbinfo->fix.ypanstep = 0;
 459        fbinfo->fix.ywrapstep = 0;
 460        fbinfo->fix.accel = FB_ACCEL_NONE;
 461        fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 462
 463        fbinfo->var.nonstd = 0;
 464        fbinfo->var.activate = FB_ACTIVATE_NOW;
 465        fbinfo->var.height = 53;
 466        fbinfo->var.width = 70;
 467        fbinfo->var.accel_flags = 0;
 468        fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 469
 470        fbinfo->var.xres = LCD_X_RES;
 471        fbinfo->var.xres_virtual = LCD_X_RES;
 472        fbinfo->var.yres = LCD_Y_RES;
 473        fbinfo->var.yres_virtual = LCD_Y_RES;
 474        fbinfo->var.bits_per_pixel = LCD_BPP;
 475
 476        fbinfo->var.red.offset = 0;
 477        fbinfo->var.green.offset = 8;
 478        fbinfo->var.blue.offset = 16;
 479        fbinfo->var.transp.offset = 0;
 480        fbinfo->var.red.length = 8;
 481        fbinfo->var.green.length = 8;
 482        fbinfo->var.blue.length = 8;
 483        fbinfo->var.transp.length = 0;
 484        fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
 485
 486        fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 487            fbinfo->var.bits_per_pixel / 8;
 488
 489
 490        fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 491        fbinfo->flags = FBINFO_FLAG_DEFAULT;
 492
 493        info->fb_buffer = dma_alloc_coherent(NULL, fbinfo->fix.smem_len +
 494                                ACTIVE_VIDEO_MEM_OFFSET,
 495                                &info->dma_handle, GFP_KERNEL);
 496
 497        if (NULL == info->fb_buffer) {
 498                printk(KERN_ERR DRIVER_NAME
 499                       ": couldn't allocate dma buffer.\n");
 500                ret = -ENOMEM;
 501                goto out3;
 502        }
 503
 504        fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 505        fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
 506
 507        fbinfo->fbops = &bfin_t350mcqb_fb_ops;
 508
 509        fbinfo->pseudo_palette = &info->pseudo_pal;
 510
 511        if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
 512            < 0) {
 513                printk(KERN_ERR DRIVER_NAME
 514                       "Fail to allocate colormap (%d entries)\n",
 515                       BFIN_LCD_NBR_PALETTE_ENTRIES);
 516                ret = -EFAULT;
 517                goto out4;
 518        }
 519
 520        if (bfin_t350mcqb_request_ports(1)) {
 521                printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
 522                ret = -EFAULT;
 523                goto out6;
 524        }
 525
 526        info->irq = platform_get_irq(pdev, 0);
 527        if (info->irq < 0) {
 528                ret = -EINVAL;
 529                goto out7;
 530        }
 531
 532        ret = request_irq(info->irq, bfin_t350mcqb_irq_error, 0,
 533                        "PPI ERROR", info);
 534        if (ret < 0) {
 535                printk(KERN_ERR DRIVER_NAME
 536                       ": unable to request PPI ERROR IRQ\n");
 537                goto out7;
 538        }
 539
 540        if (register_framebuffer(fbinfo) < 0) {
 541                printk(KERN_ERR DRIVER_NAME
 542                       ": unable to register framebuffer.\n");
 543                ret = -EINVAL;
 544                goto out8;
 545        }
 546#ifndef NO_BL_SUPPORT
 547        memset(&props, 0, sizeof(struct backlight_properties));
 548        props.type = BACKLIGHT_RAW;
 549        props.max_brightness = 255;
 550        bl_dev = backlight_device_register("bf52x-bl", NULL, NULL,
 551                                           &bfin_lq043fb_bl_ops, &props);
 552        if (IS_ERR(bl_dev)) {
 553                printk(KERN_ERR DRIVER_NAME
 554                        ": unable to register backlight.\n");
 555                ret = -EINVAL;
 556                unregister_framebuffer(fbinfo);
 557                goto out8;
 558        }
 559
 560        lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
 561        lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
 562#endif
 563
 564        return 0;
 565
 566out8:
 567        free_irq(info->irq, info);
 568out7:
 569        bfin_t350mcqb_request_ports(0);
 570out6:
 571        fb_dealloc_cmap(&fbinfo->cmap);
 572out4:
 573        dma_free_coherent(NULL, fbinfo->fix.smem_len + ACTIVE_VIDEO_MEM_OFFSET,
 574                         info->fb_buffer, info->dma_handle);
 575out3:
 576        framebuffer_release(fbinfo);
 577out2:
 578        free_dma(CH_PPI);
 579out1:
 580        platform_set_drvdata(pdev, NULL);
 581
 582        return ret;
 583}
 584
 585static int __devexit bfin_t350mcqb_remove(struct platform_device *pdev)
 586{
 587
 588        struct fb_info *fbinfo = platform_get_drvdata(pdev);
 589        struct bfin_t350mcqbfb_info *info = fbinfo->par;
 590
 591        unregister_framebuffer(fbinfo);
 592
 593        free_dma(CH_PPI);
 594        free_irq(info->irq, info);
 595
 596        if (info->fb_buffer != NULL)
 597                dma_free_coherent(NULL, fbinfo->fix.smem_len +
 598                        ACTIVE_VIDEO_MEM_OFFSET, info->fb_buffer,
 599                        info->dma_handle);
 600
 601        fb_dealloc_cmap(&fbinfo->cmap);
 602
 603#ifndef NO_BL_SUPPORT
 604        lcd_device_unregister(lcd_dev);
 605        backlight_device_unregister(bl_dev);
 606#endif
 607
 608        bfin_t350mcqb_request_ports(0);
 609
 610        platform_set_drvdata(pdev, NULL);
 611        framebuffer_release(fbinfo);
 612
 613        printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
 614
 615        return 0;
 616}
 617
 618#ifdef CONFIG_PM
 619static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
 620{
 621        struct fb_info *fbinfo = platform_get_drvdata(pdev);
 622        struct bfin_t350mcqbfb_info *fbi = fbinfo->par;
 623
 624        if (fbi->lq043_open_cnt) {
 625                bfin_t350mcqb_disable_ppi();
 626                disable_dma(CH_PPI);
 627                bfin_t350mcqb_stop_timers();
 628                bfin_write_PPI_STATUS(-1);
 629        }
 630
 631
 632        return 0;
 633}
 634
 635static int bfin_t350mcqb_resume(struct platform_device *pdev)
 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_config_dma(fbi);
 642                bfin_t350mcqb_config_ppi(fbi);
 643                bfin_t350mcqb_init_timers();
 644
 645                /* start dma */
 646                enable_dma(CH_PPI);
 647                bfin_t350mcqb_enable_ppi();
 648                bfin_t350mcqb_start_timers();
 649        }
 650
 651        return 0;
 652}
 653#else
 654#define bfin_t350mcqb_suspend   NULL
 655#define bfin_t350mcqb_resume    NULL
 656#endif
 657
 658static struct platform_driver bfin_t350mcqb_driver = {
 659        .probe = bfin_t350mcqb_probe,
 660        .remove = __devexit_p(bfin_t350mcqb_remove),
 661        .suspend = bfin_t350mcqb_suspend,
 662        .resume = bfin_t350mcqb_resume,
 663        .driver = {
 664                   .name = DRIVER_NAME,
 665                   .owner = THIS_MODULE,
 666                   },
 667};
 668
 669static int __init bfin_t350mcqb_driver_init(void)
 670{
 671        return platform_driver_register(&bfin_t350mcqb_driver);
 672}
 673
 674static void __exit bfin_t350mcqb_driver_cleanup(void)
 675{
 676        platform_driver_unregister(&bfin_t350mcqb_driver);
 677}
 678
 679MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
 680MODULE_LICENSE("GPL");
 681
 682module_init(bfin_t350mcqb_driver_init);
 683module_exit(bfin_t350mcqb_driver_cleanup);
 684
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