drivers/video/imxfb.c

   1 /*
   2  *  linux/drivers/video/imxfb.c
   3  *
   4  *  Freescale i.MX Frame Buffer device driver
   5  *
   6  *  Copyright (C) 2004 Sascha Hauer, Pengutronix
   7  *   Based on acornfb.c Copyright (C) Russell King.
   8  *
   9  * This file is subject to the terms and conditions of the GNU General Public
  10  * License.  See the file COPYING in the main directory of this archive for
  11  * more details.
  12  *
  13  * Please direct your questions and comments on this driver to the following
  14  * email address:
  15  *
  16  *      linux-arm-kernel@lists.arm.linux.org.uk
  17  */
  18
  19 //#define DEBUG 1
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/errno.h>
  24 #include <linux/string.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/slab.h>
  27 #include <linux/mm.h>
  28 #include <linux/fb.h>
  29 #include <linux/delay.h>
  30 #include <linux/init.h>
  31 #include <linux/ioport.h>
  32 #include <linux/cpufreq.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/dma-mapping.h>
  35
  36 #include <mach/hardware.h>
  37 #include <asm/io.h>
  38 #include <mach/imxfb.h>
  39
  40 /*
  41  * Complain if VAR is out of range.
  42  */
  43 #define DEBUG_VAR 1
  44
  45 #include "imxfb.h"
  46
  47 static struct imxfb_rgb def_rgb_16 = {
  48         .red    = { .offset = 8,  .length = 4, },
  49         .green  = { .offset = 4,  .length = 4, },
  50         .blue   = { .offset = 0,  .length = 4, },
  51         .transp = { .offset = 0,  .length = 0, },
  52 };
  53
  54 static struct imxfb_rgb def_rgb_8 = {
  55         .red    = { .offset = 0,  .length = 8, },
  56         .green  = { .offset = 0,  .length = 8, },
  57         .blue   = { .offset = 0,  .length = 8, },
  58         .transp = { .offset = 0,  .length = 0, },
  59 };
  60
  61 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info);
  62
  63 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
  64 {
  65         chan &= 0xffff;
  66         chan >>= 16 - bf->length;
  67         return chan << bf->offset;
  68 }
  69
  70 #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
  71 static int
  72 imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
  73                        u_int trans, struct fb_info *info)
  74 {
  75         struct imxfb_info *fbi = info->par;
  76         u_int val, ret = 1;
  77
  78 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
  79         if (regno < fbi->palette_size) {
  80                 val = (CNVT_TOHW(red, 4) << 8) |
  81                       (CNVT_TOHW(green,4) << 4) |
  82                       CNVT_TOHW(blue,  4);
  83
  84                 LCDC_PALETTE(regno) = val;
  85                 ret = 0;
  86         }
  87         return ret;
  88 }
  89
  90 static int
  91 imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  92                    u_int trans, struct fb_info *info)
  93 {
  94         struct imxfb_info *fbi = info->par;
  95         unsigned int val;
  96         int ret = 1;
  97
  98         /*
  99          * If inverse mode was selected, invert all the colours
 100          * rather than the register number.  The register number
 101          * is what you poke into the framebuffer to produce the
 102          * colour you requested.
 103          */
 104         if (fbi->cmap_inverse) {
 105                 red   = 0xffff - red;
 106                 green = 0xffff - green;
 107                 blue  = 0xffff - blue;
 108         }
 109
 110         /*
 111          * If greyscale is true, then we convert the RGB value
 112          * to greyscale no mater what visual we are using.
 113          */
 114         if (info->var.grayscale)
 115                 red = green = blue = (19595 * red + 38470 * green +
 116                                         7471 * blue) >> 16;
 117
 118         switch (info->fix.visual) {
 119         case FB_VISUAL_TRUECOLOR:
 120                 /*
 121                  * 12 or 16-bit True Colour.  We encode the RGB value
 122                  * according to the RGB bitfield information.
 123                  */
 124                 if (regno < 16) {
 125                         u32 *pal = info->pseudo_palette;
 126
 127                         val  = chan_to_field(red, &info->var.red);
 128                         val |= chan_to_field(green, &info->var.green);
 129                         val |= chan_to_field(blue, &info->var.blue);
 130
 131                         pal[regno] = val;
 132                         ret = 0;
 133                 }
 134                 break;
 135
 136         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 137         case FB_VISUAL_PSEUDOCOLOR:
 138                 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
 139                 break;
 140         }
 141
 142         return ret;
 143 }
 144
 145 /*
 146  *  imxfb_check_var():
 147  *    Round up in the following order: bits_per_pixel, xres,
 148  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 149  *    bitfields, horizontal timing, vertical timing.
 150  */
 151 static int
 152 imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 153 {
 154         struct imxfb_info *fbi = info->par;
 155         int rgbidx;
 156
 157         if (var->xres < MIN_XRES)
 158                 var->xres = MIN_XRES;
 159         if (var->yres < MIN_YRES)
 160                 var->yres = MIN_YRES;
 161         if (var->xres > fbi->max_xres)
 162                 var->xres = fbi->max_xres;
 163         if (var->yres > fbi->max_yres)
 164                 var->yres = fbi->max_yres;
 165         var->xres_virtual = max(var->xres_virtual, var->xres);
 166         var->yres_virtual = max(var->yres_virtual, var->yres);
 167
 168         pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
 169         switch (var->bits_per_pixel) {
 170         case 16:
 171                 rgbidx = RGB_16;
 172                 break;
 173         case 8:
 174                 rgbidx = RGB_8;
 175                 break;
 176         default:
 177                 rgbidx = RGB_16;
 178         }
 179
 180         /*
 181          * Copy the RGB parameters for this display
 182          * from the machine specific parameters.
 183          */
 184         var->red    = fbi->rgb[rgbidx]->red;
 185         var->green  = fbi->rgb[rgbidx]->green;
 186         var->blue   = fbi->rgb[rgbidx]->blue;
 187         var->transp = fbi->rgb[rgbidx]->transp;
 188
 189         pr_debug("RGBT length = %d:%d:%d:%d\n",
 190                 var->red.length, var->green.length, var->blue.length,
 191                 var->transp.length);
 192
 193         pr_debug("RGBT offset = %d:%d:%d:%d\n",
 194                 var->red.offset, var->green.offset, var->blue.offset,
 195                 var->transp.offset);
 196
 197         return 0;
 198 }
 199
 200 /*
 201  * imxfb_set_par():
 202  *      Set the user defined part of the display for the specified console
 203  */
 204 static int imxfb_set_par(struct fb_info *info)
 205 {
 206         struct imxfb_info *fbi = info->par;
 207         struct fb_var_screeninfo *var = &info->var;
 208
 209         pr_debug("set_par\n");
 210
 211         if (var->bits_per_pixel == 16)
 212                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 213         else if (!fbi->cmap_static)
 214                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 215         else {
 216                 /*
 217                  * Some people have weird ideas about wanting static
 218                  * pseudocolor maps.  I suspect their user space
 219                  * applications are broken.
 220                  */
 221                 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 222         }
 223
 224         info->fix.line_length = var->xres_virtual *
 225                                   var->bits_per_pixel / 8;
 226         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 227
 228         imxfb_activate_var(var, info);
 229
 230         return 0;
 231 }
 232
 233 static void imxfb_enable_controller(struct imxfb_info *fbi)
 234 {
 235         pr_debug("Enabling LCD controller\n");
 236
 237         /* initialize LCDC */
 238         LCDC_RMCR &= ~RMCR_LCDC_EN;             /* just to be safe... */
 239
 240         LCDC_SSA        = fbi->screen_dma;
 241         /* physical screen start address            */
 242         LCDC_VPW        = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);
 243
 244         LCDC_POS        = 0x00000000;   /* panning offset 0 (0 pixel offset)        */
 245
 246         /* disable hardware cursor */
 247         LCDC_CPOS       &= ~(CPOS_CC0 | CPOS_CC1);
 248
 249         LCDC_RMCR = RMCR_LCDC_EN;
 250
 251         if(fbi->backlight_power)
 252                 fbi->backlight_power(1);
 253         if(fbi->lcd_power)
 254                 fbi->lcd_power(1);
 255 }
 256
 257 static void imxfb_disable_controller(struct imxfb_info *fbi)
 258 {
 259         pr_debug("Disabling LCD controller\n");
 260
 261         if(fbi->backlight_power)
 262                 fbi->backlight_power(0);
 263         if(fbi->lcd_power)
 264                 fbi->lcd_power(0);
 265
 266         LCDC_RMCR = 0;
 267 }
 268
 269 static int imxfb_blank(int blank, struct fb_info *info)
 270 {
 271         struct imxfb_info *fbi = info->par;
 272
 273         pr_debug("imxfb_blank: blank=%d\n", blank);
 274
 275         switch (blank) {
 276         case FB_BLANK_POWERDOWN:
 277         case FB_BLANK_VSYNC_SUSPEND:
 278         case FB_BLANK_HSYNC_SUSPEND:
 279         case FB_BLANK_NORMAL:
 280                 imxfb_disable_controller(fbi);
 281                 break;
 282
 283         case FB_BLANK_UNBLANK:
 284                 imxfb_enable_controller(fbi);
 285                 break;
 286         }
 287         return 0;
 288 }
 289
 290 static struct fb_ops imxfb_ops = {
 291         .owner          = THIS_MODULE,
 292         .fb_check_var   = imxfb_check_var,
 293         .fb_set_par     = imxfb_set_par,
 294         .fb_setcolreg   = imxfb_setcolreg,
 295         .fb_fillrect    = cfb_fillrect,
 296         .fb_copyarea    = cfb_copyarea,
 297         .fb_imageblit   = cfb_imageblit,
 298         .fb_blank       = imxfb_blank,
 299 };
 300
 301 /*
 302  * imxfb_activate_var():
 303  *      Configures LCD Controller based on entries in var parameter.  Settings are
 304  *      only written to the controller if changes were made.
 305  */
 306 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
 307 {
 308         struct imxfb_info *fbi = info->par;
 309         pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
 310                 var->xres, var->hsync_len,
 311                 var->left_margin, var->right_margin);
 312         pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
 313                 var->yres, var->vsync_len,
 314                 var->upper_margin, var->lower_margin);
 315
 316 #if DEBUG_VAR
 317         if (var->xres < 16        || var->xres > 1024)
 318                 printk(KERN_ERR "%s: invalid xres %d\n",
 319                         info->fix.id, var->xres);
 320         if (var->hsync_len < 1    || var->hsync_len > 64)
 321                 printk(KERN_ERR "%s: invalid hsync_len %d\n",
 322                         info->fix.id, var->hsync_len);
 323         if (var->left_margin > 255)
 324                 printk(KERN_ERR "%s: invalid left_margin %d\n",
 325                         info->fix.id, var->left_margin);
 326         if (var->right_margin > 255)
 327                 printk(KERN_ERR "%s: invalid right_margin %d\n",
 328                         info->fix.id, var->right_margin);
 329         if (var->yres < 1 || var->yres > 511)
 330                 printk(KERN_ERR "%s: invalid yres %d\n",
 331                         info->fix.id, var->yres);
 332         if (var->vsync_len > 100)
 333                 printk(KERN_ERR "%s: invalid vsync_len %d\n",
 334                         info->fix.id, var->vsync_len);
 335         if (var->upper_margin > 63)
 336                 printk(KERN_ERR "%s: invalid upper_margin %d\n",
 337                         info->fix.id, var->upper_margin);
 338         if (var->lower_margin > 255)
 339                 printk(KERN_ERR "%s: invalid lower_margin %d\n",
 340                         info->fix.id, var->lower_margin);
 341 #endif
 342
 343         LCDC_HCR        = HCR_H_WIDTH(var->hsync_len) |
 344                           HCR_H_WAIT_1(var->left_margin) |
 345                           HCR_H_WAIT_2(var->right_margin);
 346
 347         LCDC_VCR        = VCR_V_WIDTH(var->vsync_len) |
 348                           VCR_V_WAIT_1(var->upper_margin) |
 349                           VCR_V_WAIT_2(var->lower_margin);
 350
 351         LCDC_SIZE       = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres);
 352         LCDC_PCR        = fbi->pcr;
 353         LCDC_PWMR       = fbi->pwmr;
 354         LCDC_LSCR1      = fbi->lscr1;
 355         LCDC_DMACR      = fbi->dmacr;
 356
 357         return 0;
 358 }
 359
 360 static void imxfb_setup_gpio(struct imxfb_info *fbi)
 361 {
 362         int width;
 363
 364         LCDC_RMCR       &= ~(RMCR_LCDC_EN | RMCR_SELF_REF);
 365
 366         if( fbi->pcr & PCR_TFT )
 367                 width = 16;
 368         else
 369                 width = 1 << ((fbi->pcr >> 28) & 0x3);
 370
 371         switch(width) {
 372         case 16:
 373                 imx_gpio_mode(PD30_PF_LD15);
 374                 imx_gpio_mode(PD29_PF_LD14);
 375                 imx_gpio_mode(PD28_PF_LD13);
 376                 imx_gpio_mode(PD27_PF_LD12);
 377                 imx_gpio_mode(PD26_PF_LD11);
 378                 imx_gpio_mode(PD25_PF_LD10);
 379                 imx_gpio_mode(PD24_PF_LD9);
 380                 imx_gpio_mode(PD23_PF_LD8);
 381         case 8:
 382                 imx_gpio_mode(PD22_PF_LD7);
 383                 imx_gpio_mode(PD21_PF_LD6);
 384                 imx_gpio_mode(PD20_PF_LD5);
 385                 imx_gpio_mode(PD19_PF_LD4);
 386         case 4:
 387                 imx_gpio_mode(PD18_PF_LD3);
 388                 imx_gpio_mode(PD17_PF_LD2);
 389         case 2:
 390                 imx_gpio_mode(PD16_PF_LD1);
 391         case 1:
 392                 imx_gpio_mode(PD15_PF_LD0);
 393         }
 394
 395         /* initialize GPIOs */
 396         imx_gpio_mode(PD6_PF_LSCLK);
 397         imx_gpio_mode(PD11_PF_CONTRAST);
 398         imx_gpio_mode(PD14_PF_FLM_VSYNC);
 399         imx_gpio_mode(PD13_PF_LP_HSYNC);
 400         imx_gpio_mode(PD12_PF_ACD_OE);
 401
 402         /* These are only needed for Sharp HR TFT displays */
 403         if (fbi->pcr & PCR_SHARP) {
 404                 imx_gpio_mode(PD7_PF_REV);
 405                 imx_gpio_mode(PD8_PF_CLS);
 406                 imx_gpio_mode(PD9_PF_PS);
 407                 imx_gpio_mode(PD10_PF_SPL_SPR);
 408         }
 409 }
 410
 411 #ifdef CONFIG_PM
 412 /*
 413  * Power management hooks.  Note that we won't be called from IRQ context,
 414  * unlike the blank functions above, so we may sleep.
 415  */
 416 static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
 417 {
 418         struct imxfb_info *fbi = platform_get_drvdata(dev);
 419         pr_debug("%s\n",__func__);
 420
 421         imxfb_disable_controller(fbi);
 422         return 0;
 423 }
 424
 425 static int imxfb_resume(struct platform_device *dev)
 426 {
 427         struct imxfb_info *fbi = platform_get_drvdata(dev);
 428         pr_debug("%s\n",__func__);
 429
 430         imxfb_enable_controller(fbi);
 431         return 0;
 432 }
 433 #else
 434 #define imxfb_suspend   NULL
 435 #define imxfb_resume    NULL
 436 #endif
 437
 438 static int __init imxfb_init_fbinfo(struct device *dev)
 439 {
 440         struct imxfb_mach_info *inf = dev->platform_data;
 441         struct fb_info *info = dev_get_drvdata(dev);
 442         struct imxfb_info *fbi = info->par;
 443
 444         pr_debug("%s\n",__func__);
 445
 446         info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
 447         if (!info->pseudo_palette)
 448                 return -ENOMEM;
 449
 450         memset(fbi, 0, sizeof(struct imxfb_info));
 451         fbi->dev = dev;
 452
 453         strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
 454
 455         info->fix.type  = FB_TYPE_PACKED_PIXELS;
 456         info->fix.type_aux              = 0;
 457         info->fix.xpanstep              = 0;
 458         info->fix.ypanstep              = 0;
 459         info->fix.ywrapstep             = 0;
 460         info->fix.accel = FB_ACCEL_NONE;
 461
 462         info->var.nonstd                = 0;
 463         info->var.activate              = FB_ACTIVATE_NOW;
 464         info->var.height                = -1;
 465         info->var.width = -1;
 466         info->var.accel_flags           = 0;
 467         info->var.vmode = FB_VMODE_NONINTERLACED;
 468
 469         info->fbops                     = &imxfb_ops;
 470         info->flags                     = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST;
 471
 472         fbi->rgb[RGB_16]                = &def_rgb_16;
 473         fbi->rgb[RGB_8]                 = &def_rgb_8;
 474
 475         fbi->max_xres                   = inf->xres;
 476         info->var.xres                  = inf->xres;
 477         info->var.xres_virtual          = inf->xres;
 478         fbi->max_yres                   = inf->yres;
 479         info->var.yres                  = inf->yres;
 480         info->var.yres_virtual          = inf->yres;
 481         fbi->max_bpp                    = inf->bpp;
 482         info->var.bits_per_pixel        = inf->bpp;
 483         info->var.nonstd                = inf->nonstd;
 484         info->var.pixclock              = inf->pixclock;
 485         info->var.hsync_len             = inf->hsync_len;
 486         info->var.left_margin           = inf->left_margin;
 487         info->var.right_margin          = inf->right_margin;
 488         info->var.vsync_len             = inf->vsync_len;
 489         info->var.upper_margin          = inf->upper_margin;
 490         info->var.lower_margin          = inf->lower_margin;
 491         info->var.sync                  = inf->sync;
 492         info->var.grayscale             = inf->cmap_greyscale;
 493         fbi->cmap_inverse               = inf->cmap_inverse;
 494         fbi->cmap_static                = inf->cmap_static;
 495         fbi->pcr                        = inf->pcr;
 496         fbi->lscr1                      = inf->lscr1;
 497         fbi->dmacr                      = inf->dmacr;
 498         fbi->pwmr                       = inf->pwmr;
 499         fbi->lcd_power                  = inf->lcd_power;
 500         fbi->backlight_power            = inf->backlight_power;
 501         info->fix.smem_len              = fbi->max_xres * fbi->max_yres *
 502                                           fbi->max_bpp / 8;
 503
 504         return 0;
 505 }
 506
 507 /*
 508  *      Allocates the DRAM memory for the frame buffer.  This buffer is
 509  *      remapped into a non-cached, non-buffered, memory region to
 510  *      allow pixel writes to occur without flushing the cache.
 511  *      Once this area is remapped, all virtual memory access to the
 512  *      video memory should occur at the new region.
 513  */
 514 static int __init imxfb_map_video_memory(struct fb_info *info)
 515 {
 516         struct imxfb_info *fbi = info->par;
 517
 518         fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
 519         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
 520                                         &fbi->map_dma,GFP_KERNEL);
 521
 522         if (fbi->map_cpu) {
 523                 info->screen_base = fbi->map_cpu;
 524                 fbi->screen_cpu = fbi->map_cpu;
 525                 fbi->screen_dma = fbi->map_dma;
 526                 info->fix.smem_start = fbi->screen_dma;
 527         }
 528
 529         return fbi->map_cpu ? 0 : -ENOMEM;
 530 }
 531
 532 static int __init imxfb_probe(struct platform_device *pdev)
 533 {
 534         struct imxfb_info *fbi;
 535         struct fb_info *info;
 536         struct imxfb_mach_info *inf;
 537         struct resource *res;
 538         int ret;
 539
 540         printk("i.MX Framebuffer driver\n");
 541
 542         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 543         if(!res)
 544                 return -ENODEV;
 545
 546         inf = pdev->dev.platform_data;
 547         if(!inf) {
 548                 dev_err(&pdev->dev,"No platform_data available\n");
 549                 return -ENOMEM;
 550         }
 551
 552         info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
 553         if(!info)
 554                 return -ENOMEM;
 555
 556         fbi = info->par;
 557
 558         platform_set_drvdata(pdev, info);
 559
 560         ret = imxfb_init_fbinfo(&pdev->dev);
 561         if( ret < 0 )
 562                 goto failed_init;
 563
 564         res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
 565         if (!res) {
 566                 ret = -EBUSY;
 567                 goto failed_regs;
 568         }
 569
 570         if (!inf->fixed_screen_cpu) {
 571                 ret = imxfb_map_video_memory(info);
 572                 if (ret) {
 573                         dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
 574                         ret = -ENOMEM;
 575                         goto failed_map;
 576                 }
 577         } else {
 578                 /* Fixed framebuffer mapping enables location of the screen in eSRAM */
 579                 fbi->map_cpu = inf->fixed_screen_cpu;
 580                 fbi->map_dma = inf->fixed_screen_dma;
 581                 info->screen_base = fbi->map_cpu;
 582                 fbi->screen_cpu = fbi->map_cpu;
 583                 fbi->screen_dma = fbi->map_dma;
 584                 info->fix.smem_start = fbi->screen_dma;
 585         }
 586
 587         /*
 588          * This makes sure that our colour bitfield
 589          * descriptors are correctly initialised.
 590          */
 591         imxfb_check_var(&info->var, info);
 592
 593         ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
 594         if (ret < 0)
 595                 goto failed_cmap;
 596
 597         imxfb_setup_gpio(fbi);
 598
 599         imxfb_set_par(info);
 600         ret = register_framebuffer(info);
 601         if (ret < 0) {
 602                 dev_err(&pdev->dev, "failed to register framebuffer\n");
 603                 goto failed_register;
 604         }
 605
 606         imxfb_enable_controller(fbi);
 607
 608         return 0;
 609
 610 failed_register:
 611         fb_dealloc_cmap(&info->cmap);
 612 failed_cmap:
 613         if (!inf->fixed_screen_cpu)
 614                 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
 615                            fbi->map_dma);
 616 failed_map:
 617         kfree(info->pseudo_palette);
 618 failed_regs:
 619         release_mem_region(res->start, res->end - res->start);
 620 failed_init:
 621         platform_set_drvdata(pdev, NULL);
 622         framebuffer_release(info);
 623         return ret;
 624 }
 625
 626 static int imxfb_remove(struct platform_device *pdev)
 627 {
 628         struct fb_info *info = platform_get_drvdata(pdev);
 629         struct imxfb_info *fbi = info->par;
 630         struct resource *res;
 631
 632         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 633
 634         imxfb_disable_controller(fbi);
 635
 636         unregister_framebuffer(info);
 637
 638         fb_dealloc_cmap(&info->cmap);
 639         kfree(info->pseudo_palette);
 640         framebuffer_release(info);
 641
 642         release_mem_region(res->start, res->end - res->start + 1);
 643         platform_set_drvdata(pdev, NULL);
 644
 645         return 0;
 646 }
 647
 648 void  imxfb_shutdown(struct platform_device * dev)
 649 {
 650         struct fb_info *info = platform_get_drvdata(dev);
 651         struct imxfb_info *fbi = info->par;
 652         imxfb_disable_controller(fbi);
 653 }
 654
 655 static struct platform_driver imxfb_driver = {
 656         .probe          = imxfb_probe,
 657         .suspend        = imxfb_suspend,
 658         .resume         = imxfb_resume,
 659         .remove         = imxfb_remove,
 660         .shutdown       = imxfb_shutdown,
 661         .driver         = {
 662                 .name   = "imx-fb",
 663         },
 664 };
 665
 666 int __init imxfb_init(void)
 667 {
 668         return platform_driver_register(&imxfb_driver);
 669 }
 670
 671 static void __exit imxfb_cleanup(void)
 672 {
 673         platform_driver_unregister(&imxfb_driver);
 674 }
 675
 676 module_init(imxfb_init);
 677 module_exit(imxfb_cleanup);
 678
 679 MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
 680 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
 681 MODULE_LICENSE("GPL");