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/sched.h>
  24 #include <linux/errno.h>
  25 #include <linux/string.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/slab.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 <asm/hardware.h>
  37 #include <asm/io.h>
  38 #include <asm/uaccess.h>
  39 #include <asm/arch/imxfb.h>
  40
  41 /*
  42  * Complain if VAR is out of range.
  43  */
  44 #define DEBUG_VAR 1
  45
  46 #include "imxfb.h"
  47
  48 static struct imxfb_rgb def_rgb_16 = {
  49         .red    = { .offset = 8,  .length = 4, },
  50         .green  = { .offset = 4,  .length = 4, },
  51         .blue   = { .offset = 0,  .length = 4, },
  52         .transp = { .offset = 0,  .length = 0, },
  53 };
  54
  55 static struct imxfb_rgb def_rgb_8 = {
  56         .red    = { .offset = 0,  .length = 8, },
  57         .green  = { .offset = 0,  .length = 8, },
  58         .blue   = { .offset = 0,  .length = 8, },
  59         .transp = { .offset = 0,  .length = 0, },
  60 };
  61
  62 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info);
  63
  64 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
  65 {
  66         chan &= 0xffff;
  67         chan >>= 16 - bf->length;
  68         return chan << bf->offset;
  69 }
  70
  71 #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
  72 static int
  73 imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
  74                        u_int trans, struct fb_info *info)
  75 {
  76         struct imxfb_info *fbi = info->par;
  77         u_int val, ret = 1;
  78
  79 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
  80         if (regno < fbi->palette_size) {
  81                 val = (CNVT_TOHW(red, 4) << 8) |
  82                       (CNVT_TOHW(green,4) << 4) |
  83                       CNVT_TOHW(blue,  4);
  84
  85                 LCDC_PALETTE(regno) = val;
  86                 ret = 0;
  87         }
  88         return ret;
  89 }
  90
  91 static int
  92 imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  93                    u_int trans, struct fb_info *info)
  94 {
  95         struct imxfb_info *fbi = info->par;
  96         unsigned int val;
  97         int ret = 1;
  98
  99         /*
 100          * If inverse mode was selected, invert all the colours
 101          * rather than the register number.  The register number
 102          * is what you poke into the framebuffer to produce the
 103          * colour you requested.
 104          */
 105         if (fbi->cmap_inverse) {
 106                 red   = 0xffff - red;
 107                 green = 0xffff - green;
 108                 blue  = 0xffff - blue;
 109         }
 110
 111         /*
 112          * If greyscale is true, then we convert the RGB value
 113          * to greyscale no mater what visual we are using.
 114          */
 115         if (info->var.grayscale)
 116                 red = green = blue = (19595 * red + 38470 * green +
 117                                         7471 * blue) >> 16;
 118
 119         switch (info->fix.visual) {
 120         case FB_VISUAL_TRUECOLOR:
 121                 /*
 122                  * 12 or 16-bit True Colour.  We encode the RGB value
 123                  * according to the RGB bitfield information.
 124                  */
 125                 if (regno < 16) {
 126                         u32 *pal = info->pseudo_palette;
 127
 128                         val  = chan_to_field(red, &info->var.red);
 129                         val |= chan_to_field(green, &info->var.green);
 130                         val |= chan_to_field(blue, &info->var.blue);
 131
 132                         pal[regno] = val;
 133                         ret = 0;
 134                 }
 135                 break;
 136
 137         case FB_VISUAL_STATIC_PSEUDOCOLOR:
 138         case FB_VISUAL_PSEUDOCOLOR:
 139                 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
 140                 break;
 141         }
 142
 143         return ret;
 144 }
 145
 146 /*
 147  *  imxfb_check_var():
 148  *    Round up in the following order: bits_per_pixel, xres,
 149  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 150  *    bitfields, horizontal timing, vertical timing.
 151  */
 152 static int
 153 imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 154 {
 155         struct imxfb_info *fbi = info->par;
 156         int rgbidx;
 157
 158         if (var->xres < MIN_XRES)
 159                 var->xres = MIN_XRES;
 160         if (var->yres < MIN_YRES)
 161                 var->yres = MIN_YRES;
 162         if (var->xres > fbi->max_xres)
 163                 var->xres = fbi->max_xres;
 164         if (var->yres > fbi->max_yres)
 165                 var->yres = fbi->max_yres;
 166         var->xres_virtual = max(var->xres_virtual, var->xres);
 167         var->yres_virtual = max(var->yres_virtual, var->yres);
 168
 169         pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
 170         switch (var->bits_per_pixel) {
 171         case 16:
 172                 rgbidx = RGB_16;
 173                 break;
 174         case 8:
 175                 rgbidx = RGB_8;
 176                 break;
 177         default:
 178                 rgbidx = RGB_16;
 179         }
 180
 181         /*
 182          * Copy the RGB parameters for this display
 183          * from the machine specific parameters.
 184          */
 185         var->red    = fbi->rgb[rgbidx]->red;
 186         var->green  = fbi->rgb[rgbidx]->green;
 187         var->blue   = fbi->rgb[rgbidx]->blue;
 188         var->transp = fbi->rgb[rgbidx]->transp;
 189
 190         pr_debug("RGBT length = %d:%d:%d:%d\n",
 191                 var->red.length, var->green.length, var->blue.length,
 192                 var->transp.length);
 193
 194         pr_debug("RGBT offset = %d:%d:%d:%d\n",
 195                 var->red.offset, var->green.offset, var->blue.offset,
 196                 var->transp.offset);
 197
 198         return 0;
 199 }
 200
 201 /*
 202  * imxfb_set_par():
 203  *      Set the user defined part of the display for the specified console
 204  */
 205 static int imxfb_set_par(struct fb_info *info)
 206 {
 207         struct imxfb_info *fbi = info->par;
 208         struct fb_var_screeninfo *var = &info->var;
 209
 210         pr_debug("set_par\n");
 211
 212         if (var->bits_per_pixel == 16)
 213                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 214         else if (!fbi->cmap_static)
 215                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 216         else {
 217                 /*
 218                  * Some people have weird ideas about wanting static
 219                  * pseudocolor maps.  I suspect their user space
 220                  * applications are broken.
 221                  */
 222                 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
 223         }
 224
 225         info->fix.line_length = var->xres_virtual *
 226                                   var->bits_per_pixel / 8;
 227         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
 228
 229         imxfb_activate_var(var, info);
 230
 231         return 0;
 232 }
 233
 234 static void imxfb_enable_controller(struct imxfb_info *fbi)
 235 {
 236         pr_debug("Enabling LCD controller\n");
 237
 238         /* initialize LCDC */
 239         LCDC_RMCR &= ~RMCR_LCDC_EN;             /* just to be safe... */
 240
 241         LCDC_SSA        = fbi->screen_dma;
 242         /* physical screen start address            */
 243         LCDC_VPW        = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);
 244
 245         LCDC_POS        = 0x00000000;   /* panning offset 0 (0 pixel offset)        */
 246
 247         /* disable hardware cursor */
 248         LCDC_CPOS       &= ~(CPOS_CC0 | CPOS_CC1);
 249
 250         LCDC_RMCR = RMCR_LCDC_EN;
 251
 252         if(fbi->backlight_power)
 253                 fbi->backlight_power(1);
 254         if(fbi->lcd_power)
 255                 fbi->lcd_power(1);
 256 }
 257
 258 static void imxfb_disable_controller(struct imxfb_info *fbi)
 259 {
 260         pr_debug("Disabling LCD controller\n");
 261
 262         if(fbi->backlight_power)
 263                 fbi->backlight_power(0);
 264         if(fbi->lcd_power)
 265                 fbi->lcd_power(0);
 266
 267         LCDC_RMCR = 0;
 268 }
 269
 270 static int imxfb_blank(int blank, struct fb_info *info)
 271 {
 272         struct imxfb_info *fbi = info->par;
 273
 274         pr_debug("imxfb_blank: blank=%d\n", blank);
 275
 276         switch (blank) {
 277         case FB_BLANK_POWERDOWN:
 278         case FB_BLANK_VSYNC_SUSPEND:
 279         case FB_BLANK_HSYNC_SUSPEND:
 280         case FB_BLANK_NORMAL:
 281                 imxfb_disable_controller(fbi);
 282                 break;
 283
 284         case FB_BLANK_UNBLANK:
 285                 imxfb_enable_controller(fbi);
 286                 break;
 287         }
 288         return 0;
 289 }
 290
 291 static struct fb_ops imxfb_ops = {
 292         .owner          = THIS_MODULE,
 293         .fb_check_var   = imxfb_check_var,
 294         .fb_set_par     = imxfb_set_par,
 295         .fb_setcolreg   = imxfb_setcolreg,
 296         .fb_fillrect    = cfb_fillrect,
 297         .fb_copyarea    = cfb_copyarea,
 298         .fb_imageblit   = cfb_imageblit,
 299         .fb_blank       = imxfb_blank,
 300 };
 301
 302 /*
 303  * imxfb_activate_var():
 304  *      Configures LCD Controller based on entries in var parameter.  Settings are
 305  *      only written to the controller if changes were made.
 306  */
 307 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
 308 {
 309         struct imxfb_info *fbi = info->par;
 310         pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
 311                 var->xres, var->hsync_len,
 312                 var->left_margin, var->right_margin);
 313         pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
 314                 var->yres, var->vsync_len,
 315                 var->upper_margin, var->lower_margin);
 316
 317 #if DEBUG_VAR
 318         if (var->xres < 16        || var->xres > 1024)
 319                 printk(KERN_ERR "%s: invalid xres %d\n",
 320                         info->fix.id, var->xres);
 321         if (var->hsync_len < 1    || var->hsync_len > 64)
 322                 printk(KERN_ERR "%s: invalid hsync_len %d\n",
 323                         info->fix.id, var->hsync_len);
 324         if (var->left_margin > 255)
 325                 printk(KERN_ERR "%s: invalid left_margin %d\n",
 326                         info->fix.id, var->left_margin);
 327         if (var->right_margin > 255)
 328                 printk(KERN_ERR "%s: invalid right_margin %d\n",
 329                         info->fix.id, var->right_margin);
 330         if (var->yres < 1 || var->yres > 511)
 331                 printk(KERN_ERR "%s: invalid yres %d\n",
 332                         info->fix.id, var->yres);
 333         if (var->vsync_len > 100)
 334                 printk(KERN_ERR "%s: invalid vsync_len %d\n",
 335                         info->fix.id, var->vsync_len);
 336         if (var->upper_margin > 63)
 337                 printk(KERN_ERR "%s: invalid upper_margin %d\n",
 338                         info->fix.id, var->upper_margin);
 339         if (var->lower_margin > 255)
 340                 printk(KERN_ERR "%s: invalid lower_margin %d\n",
 341                         info->fix.id, var->lower_margin);
 342 #endif
 343
 344         LCDC_HCR        = HCR_H_WIDTH(var->hsync_len) |
 345                           HCR_H_WAIT_1(var->left_margin) |
 346                           HCR_H_WAIT_2(var->right_margin);
 347
 348         LCDC_VCR        = VCR_V_WIDTH(var->vsync_len) |
 349                           VCR_V_WAIT_1(var->upper_margin) |
 350                           VCR_V_WAIT_2(var->lower_margin);
 351
 352         LCDC_SIZE       = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres);
 353         LCDC_PCR        = fbi->pcr;
 354         LCDC_PWMR       = fbi->pwmr;
 355         LCDC_LSCR1      = fbi->lscr1;
 356         LCDC_DMACR      = fbi->dmacr;
 357
 358         return 0;
 359 }
 360
 361 static void imxfb_setup_gpio(struct imxfb_info *fbi)
 362 {
 363         int width;
 364
 365         LCDC_RMCR       &= ~(RMCR_LCDC_EN | RMCR_SELF_REF);
 366
 367         if( fbi->pcr & PCR_TFT )
 368                 width = 16;
 369         else
 370                 width = 1 << ((fbi->pcr >> 28) & 0x3);
 371
 372         switch(width) {
 373         case 16:
 374                 imx_gpio_mode(PD30_PF_LD15);
 375                 imx_gpio_mode(PD29_PF_LD14);
 376                 imx_gpio_mode(PD28_PF_LD13);
 377                 imx_gpio_mode(PD27_PF_LD12);
 378                 imx_gpio_mode(PD26_PF_LD11);
 379                 imx_gpio_mode(PD25_PF_LD10);
 380                 imx_gpio_mode(PD24_PF_LD9);
 381                 imx_gpio_mode(PD23_PF_LD8);
 382         case 8:
 383                 imx_gpio_mode(PD22_PF_LD7);
 384                 imx_gpio_mode(PD21_PF_LD6);
 385                 imx_gpio_mode(PD20_PF_LD5);
 386                 imx_gpio_mode(PD19_PF_LD4);
 387         case 4:
 388                 imx_gpio_mode(PD18_PF_LD3);
 389                 imx_gpio_mode(PD17_PF_LD2);
 390         case 2:
 391                 imx_gpio_mode(PD16_PF_LD1);
 392         case 1:
 393                 imx_gpio_mode(PD15_PF_LD0);
 394         }
 395
 396         /* initialize GPIOs */
 397         imx_gpio_mode(PD6_PF_LSCLK);
 398         imx_gpio_mode(PD10_PF_SPL_SPR);
 399         imx_gpio_mode(PD11_PF_CONTRAST);
 400         imx_gpio_mode(PD14_PF_FLM_VSYNC);
 401         imx_gpio_mode(PD13_PF_LP_HSYNC);
 402         imx_gpio_mode(PD7_PF_REV);
 403         imx_gpio_mode(PD8_PF_CLS);
 404
 405 #ifndef CONFIG_MACH_PIMX1
 406         /* on PiMX1 used as buffers enable signal
 407          */
 408         imx_gpio_mode(PD9_PF_PS);
 409 #endif
 410
 411 #ifndef CONFIG_MACH_MX1FS2
 412         /* on mx1fs2 this pin is used to (de)activate the display, so we need
 413          * it as a normal gpio
 414          */
 415         imx_gpio_mode(PD12_PF_ACD_OE);
 416 #endif
 417
 418 }
 419
 420 #ifdef CONFIG_PM
 421 /*
 422  * Power management hooks.  Note that we won't be called from IRQ context,
 423  * unlike the blank functions above, so we may sleep.
 424  */
 425 static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
 426 {
 427         struct imxfb_info *fbi = platform_get_drvdata(dev);
 428         pr_debug("%s\n",__FUNCTION__);
 429
 430         imxfb_disable_controller(fbi);
 431         return 0;
 432 }
 433
 434 static int imxfb_resume(struct platform_device *dev)
 435 {
 436         struct imxfb_info *fbi = platform_get_drvdata(dev);
 437         pr_debug("%s\n",__FUNCTION__);
 438
 439         imxfb_enable_controller(fbi);
 440         return 0;
 441 }
 442 #else
 443 #define imxfb_suspend   NULL
 444 #define imxfb_resume    NULL
 445 #endif
 446
 447 static int __init imxfb_init_fbinfo(struct device *dev)
 448 {
 449         struct imxfb_mach_info *inf = dev->platform_data;
 450         struct fb_info *info = dev_get_drvdata(dev);
 451         struct imxfb_info *fbi = info->par;
 452
 453         pr_debug("%s\n",__FUNCTION__);
 454
 455         info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
 456         if (!info->pseudo_palette)
 457                 return -ENOMEM;
 458
 459         memset(fbi, 0, sizeof(struct imxfb_info));
 460         fbi->dev = dev;
 461
 462         strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
 463
 464         info->fix.type  = FB_TYPE_PACKED_PIXELS;
 465         info->fix.type_aux              = 0;
 466         info->fix.xpanstep              = 0;
 467         info->fix.ypanstep              = 0;
 468         info->fix.ywrapstep             = 0;
 469         info->fix.accel = FB_ACCEL_NONE;
 470
 471         info->var.nonstd                = 0;
 472         info->var.activate              = FB_ACTIVATE_NOW;
 473         info->var.height                = -1;
 474         info->var.width = -1;
 475         info->var.accel_flags           = 0;
 476         info->var.vmode = FB_VMODE_NONINTERLACED;
 477
 478         info->fbops                     = &imxfb_ops;
 479         info->flags                     = FBINFO_FLAG_DEFAULT;
 480         info->pseudo_palette            = (fbi + 1);
 481
 482         fbi->rgb[RGB_16]                = &def_rgb_16;
 483         fbi->rgb[RGB_8]                 = &def_rgb_8;
 484
 485         fbi->max_xres                   = inf->xres;
 486         info->var.xres                  = inf->xres;
 487         info->var.xres_virtual          = inf->xres;
 488         fbi->max_yres                   = inf->yres;
 489         info->var.yres                  = inf->yres;
 490         info->var.yres_virtual          = inf->yres;
 491         fbi->max_bpp                    = inf->bpp;
 492         info->var.bits_per_pixel        = inf->bpp;
 493         info->var.pixclock              = inf->pixclock;
 494         info->var.hsync_len             = inf->hsync_len;
 495         info->var.left_margin           = inf->left_margin;
 496         info->var.right_margin          = inf->right_margin;
 497         info->var.vsync_len             = inf->vsync_len;
 498         info->var.upper_margin          = inf->upper_margin;
 499         info->var.lower_margin          = inf->lower_margin;
 500         info->var.sync                  = inf->sync;
 501         info->var.grayscale             = inf->cmap_greyscale;
 502         fbi->cmap_inverse               = inf->cmap_inverse;
 503         fbi->pcr                        = inf->pcr;
 504         fbi->lscr1                      = inf->lscr1;
 505         fbi->dmacr                      = inf->dmacr;
 506         fbi->pwmr                       = inf->pwmr;
 507         fbi->lcd_power                  = inf->lcd_power;
 508         fbi->backlight_power            = inf->backlight_power;
 509         info->fix.smem_len              = fbi->max_xres * fbi->max_yres *
 510                                           fbi->max_bpp / 8;
 511
 512         return 0;
 513 }
 514
 515 /*
 516  *      Allocates the DRAM memory for the frame buffer.  This buffer is
 517  *      remapped into a non-cached, non-buffered, memory region to
 518  *      allow pixel writes to occur without flushing the cache.
 519  *      Once this area is remapped, all virtual memory access to the
 520  *      video memory should occur at the new region.
 521  */
 522 static int __init imxfb_map_video_memory(struct fb_info *info)
 523 {
 524         struct imxfb_info *fbi = info->par;
 525
 526         fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
 527         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
 528                                         &fbi->map_dma,GFP_KERNEL);
 529
 530         if (fbi->map_cpu) {
 531                 info->screen_base = fbi->map_cpu;
 532                 fbi->screen_cpu = fbi->map_cpu;
 533                 fbi->screen_dma = fbi->map_dma;
 534                 info->fix.smem_start = fbi->screen_dma;
 535         }
 536
 537         return fbi->map_cpu ? 0 : -ENOMEM;
 538 }
 539
 540 static int __init imxfb_probe(struct platform_device *pdev)
 541 {
 542         struct imxfb_info *fbi;
 543         struct fb_info *info;
 544         struct imxfb_mach_info *inf;
 545         struct resource *res;
 546         int ret;
 547
 548         printk("i.MX Framebuffer driver\n");
 549
 550         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 551         if(!res)
 552                 return -ENODEV;
 553
 554         inf = pdev->dev.platform_data;
 555         if(!inf) {
 556                 dev_err(&pdev->dev,"No platform_data available\n");
 557                 return -ENOMEM;
 558         }
 559
 560         info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
 561         if(!info)
 562                 return -ENOMEM;
 563
 564         fbi = info->par;
 565
 566         platform_set_drvdata(pdev, info);
 567
 568         ret = imxfb_init_fbinfo(&pdev->dev);
 569         if( ret < 0 )
 570                 goto failed_init;
 571
 572         res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
 573         if (!res) {
 574                 ret = -EBUSY;
 575                 goto failed_regs;
 576         }
 577
 578         if (!inf->fixed_screen_cpu) {
 579                 ret = imxfb_map_video_memory(info);
 580                 if (ret) {
 581                         dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
 582                         ret = -ENOMEM;
 583                         goto failed_map;
 584                 }
 585         } else {
 586                 /* Fixed framebuffer mapping enables location of the screen in eSRAM */
 587                 fbi->map_cpu = inf->fixed_screen_cpu;
 588                 fbi->map_dma = inf->fixed_screen_dma;
 589                 info->screen_base = fbi->map_cpu;
 590                 fbi->screen_cpu = fbi->map_cpu;
 591                 fbi->screen_dma = fbi->map_dma;
 592                 info->fix.smem_start = fbi->screen_dma;
 593         }
 594
 595         /*
 596          * This makes sure that our colour bitfield
 597          * descriptors are correctly initialised.
 598          */
 599         imxfb_check_var(&info->var, info);
 600
 601         ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
 602         if (ret < 0)
 603                 goto failed_cmap;
 604
 605         imxfb_setup_gpio(fbi);
 606
 607         imxfb_set_par(info);
 608         ret = register_framebuffer(info);
 609         if (ret < 0) {
 610                 dev_err(&pdev->dev, "failed to register framebuffer\n");
 611                 goto failed_register;
 612         }
 613
 614         imxfb_enable_controller(fbi);
 615
 616         return 0;
 617
 618 failed_register:
 619         fb_dealloc_cmap(&info->cmap);
 620 failed_cmap:
 621         if (!inf->fixed_screen_cpu)
 622                 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
 623                            fbi->map_dma);
 624 failed_map:
 625         kfree(info->pseudo_palette);
 626 failed_regs:
 627         release_mem_region(res->start, res->end - res->start);
 628 failed_init:
 629         platform_set_drvdata(pdev, NULL);
 630         framebuffer_release(info);
 631         return ret;
 632 }
 633
 634 static int imxfb_remove(struct platform_device *pdev)
 635 {
 636         struct fb_info *info = platform_get_drvdata(pdev);
 637         struct imxfb_info *fbi = info->par;
 638         struct resource *res;
 639
 640         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 641
 642         imxfb_disable_controller(fbi);
 643
 644         unregister_framebuffer(info);
 645
 646         fb_dealloc_cmap(&info->cmap);
 647         kfree(info->pseudo_palette);
 648         framebuffer_release(info);
 649
 650         release_mem_region(res->start, res->end - res->start + 1);
 651         platform_set_drvdata(pdev, NULL);
 652
 653         return 0;
 654 }
 655
 656 void  imxfb_shutdown(struct platform_device * dev)
 657 {
 658         struct fb_info *info = platform_get_drvdata(dev);
 659         struct imxfb_info *fbi = info->par;
 660         imxfb_disable_controller(fbi);
 661 }
 662
 663 static struct platform_driver imxfb_driver = {
 664         .probe          = imxfb_probe,
 665         .suspend        = imxfb_suspend,
 666         .resume         = imxfb_resume,
 667         .remove         = imxfb_remove,
 668         .shutdown       = imxfb_shutdown,
 669         .driver         = {
 670                 .name   = "imx-fb",
 671         },
 672 };
 673
 674 int __init imxfb_init(void)
 675 {
 676         return platform_driver_register(&imxfb_driver);
 677 }
 678
 679 static void __exit imxfb_cleanup(void)
 680 {
 681         platform_driver_unregister(&imxfb_driver);
 682 }
 683
 684 module_init(imxfb_init);
 685 module_exit(imxfb_cleanup);
 686
 687 MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
 688 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
 689 MODULE_LICENSE("GPL");