drivers/video/au1100fb.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      Au1100 LCD Driver.
   4  *
   5  * Rewritten for 2.6 by Embedded Alley Solutions
   6  *      <source@embeddedalley.com>, based on submissions by
   7  *      Karl Lessard <klessard@sunrisetelecom.com>
   8  *      <c.pellegrin@exadron.com>
   9  *
  10  * PM support added by Rodolfo Giometti <giometti@linux.it>
  11  * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
  12  *
  13  * Copyright 2002 MontaVista Software
  14  * Author: MontaVista Software, Inc.
  15  *              ppopov@mvista.com or source@mvista.com
  16  *
  17  * Copyright 2002 Alchemy Semiconductor
  18  * Author: Alchemy Semiconductor
  19  *
  20  * Based on:
  21  * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
  22  *  Created 28 Dec 1997 by Geert Uytterhoeven
  23  *
  24  *  This program is free software; you can redistribute  it and/or modify it
  25  *  under  the terms of  the GNU General  Public License as published by the
  26  *  Free Software Foundation;  either version 2 of the  License, or (at your
  27  *  option) any later version.
  28  *
  29  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  30  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  31  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  32  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  33  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  34  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  35  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  36  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  37  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  38  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  *  You should have received a copy of the  GNU General Public License along
  41  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  42  *  675 Mass Ave, Cambridge, MA 02139, USA.
  43  */
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/errno.h>
  47 #include <linux/string.h>
  48 #include <linux/mm.h>
  49 #include <linux/fb.h>
  50 #include <linux/init.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/ctype.h>
  53 #include <linux/dma-mapping.h>
  54 #include <linux/platform_device.h>
  55 #include <linux/slab.h>
  56
  57 #include <asm/mach-au1x00/au1000.h>
  58
  59 #define DEBUG 0
  60
  61 #include "au1100fb.h"
  62
  63 /*
  64  * Sanity check. If this is a new Au1100 based board, search for
  65  * the PB1100 ifdefs to make sure you modify the code accordingly.
  66  */
  67 #if defined(CONFIG_MIPS_PB1100)
  68   #include <asm/mach-pb1x00/pb1100.h>
  69 #elif defined(CONFIG_MIPS_DB1100)
  70   #include <asm/mach-db1x00/db1x00.h>
  71 #else
  72   #error "Unknown Au1100 board, Au1100 FB driver not supported"
  73 #endif
  74
  75 #define DRIVER_NAME "au1100fb"
  76 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
  77
  78 #define to_au1100fb_device(_info) \
  79           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  80
  81 /* Bitfields format supported by the controller. Note that the order of formats
  82  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  83  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  84  */
  85 struct fb_bitfield rgb_bitfields[][4] =
  86 {
  87         /*     Red,        Green,        Blue,       Transp   */
  88         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  89         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  90         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  91         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  92         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  93
  94         /* The last is used to describe 12bpp format */
  95         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  96 };
  97
  98 static struct fb_fix_screeninfo au1100fb_fix __devinitdata = {
  99         .id             = "AU1100 FB",
 100         .xpanstep       = 1,
 101         .ypanstep       = 1,
 102         .type           = FB_TYPE_PACKED_PIXELS,
 103         .accel          = FB_ACCEL_NONE,
 104 };
 105
 106 static struct fb_var_screeninfo au1100fb_var __devinitdata = {
 107         .activate       = FB_ACTIVATE_NOW,
 108         .height         = -1,
 109         .width          = -1,
 110         .vmode          = FB_VMODE_NONINTERLACED,
 111 };
 112
 113 /* fb_blank
 114  * Blank the screen. Depending on the mode, the screen will be
 115  * activated with the backlight color, or desactivated
 116  */
 117 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 118 {
 119         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 120
 121         print_dbg("fb_blank %d %p", blank_mode, fbi);
 122
 123         switch (blank_mode) {
 124
 125         case VESA_NO_BLANKING:
 126                         /* Turn on panel */
 127                         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 128 #ifdef CONFIG_MIPS_PB1100
 129                         if (fbdev->panel_idx == 1) {
 130                                 au_writew(au_readw(PB1100_G_CONTROL)
 131                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 132                         PB1100_G_CONTROL);
 133                         }
 134 #endif
 135                 au_sync();
 136                 break;
 137
 138         case VESA_VSYNC_SUSPEND:
 139         case VESA_HSYNC_SUSPEND:
 140         case VESA_POWERDOWN:
 141                         /* Turn off panel */
 142                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 143 #ifdef CONFIG_MIPS_PB1100
 144                         if (fbdev->panel_idx == 1) {
 145                                 au_writew(au_readw(PB1100_G_CONTROL)
 146                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 147                         PB1100_G_CONTROL);
 148                         }
 149 #endif
 150                 au_sync();
 151                 break;
 152         default:
 153                 break;
 154
 155         }
 156         return 0;
 157 }
 158
 159 /*
 160  * Set hardware with var settings. This will enable the controller with a specific
 161  * mode, normally validated with the fb_check_var method
 162          */
 163 int au1100fb_setmode(struct au1100fb_device *fbdev)
 164 {
 165         struct fb_info *info = &fbdev->info;
 166         u32 words;
 167         int index;
 168
 169         if (!fbdev)
 170                 return -EINVAL;
 171
 172         /* Update var-dependent FB info */
 173         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 174                 if (info->var.bits_per_pixel <= 8) {
 175                         /* palettized */
 176                         info->var.red.offset    = 0;
 177                         info->var.red.length    = info->var.bits_per_pixel;
 178                         info->var.red.msb_right = 0;
 179
 180                         info->var.green.offset  = 0;
 181                         info->var.green.length  = info->var.bits_per_pixel;
 182                         info->var.green.msb_right = 0;
 183
 184                         info->var.blue.offset   = 0;
 185                         info->var.blue.length   = info->var.bits_per_pixel;
 186                         info->var.blue.msb_right = 0;
 187
 188                         info->var.transp.offset = 0;
 189                         info->var.transp.length = 0;
 190                         info->var.transp.msb_right = 0;
 191
 192                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 193                         info->fix.line_length = info->var.xres_virtual /
 194                                                         (8/info->var.bits_per_pixel);
 195                 } else {
 196                         /* non-palettized */
 197                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 198                         info->var.red = rgb_bitfields[index][0];
 199                         info->var.green = rgb_bitfields[index][1];
 200                         info->var.blue = rgb_bitfields[index][2];
 201                         info->var.transp = rgb_bitfields[index][3];
 202
 203                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 204                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 205                 }
 206         } else {
 207                 /* mono */
 208                 info->fix.visual = FB_VISUAL_MONO10;
 209                 info->fix.line_length = info->var.xres_virtual / 8;
 210         }
 211
 212         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 213         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 214                                 >> LCD_CONTROL_SM_BIT) * 90;
 215
 216         /* Determine BPP mode and format */
 217         fbdev->regs->lcd_control = fbdev->panel->control_base;
 218         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 219         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 220         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 221         fbdev->regs->lcd_intenable = 0;
 222         fbdev->regs->lcd_intstatus = 0;
 223         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 224
 225         if (panel_is_dual(fbdev->panel)) {
 226                 /* Second panel display seconf half of screen if possible,
 227                  * otherwise display the same as the first panel */
 228                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 229                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 230                                                           (info->fix.line_length *
 231                                                           (info->var.yres_virtual >> 1)));
 232                 } else {
 233                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 234                 }
 235         }
 236
 237         words = info->fix.line_length / sizeof(u32);
 238         if (!info->var.rotate || (info->var.rotate == 180)) {
 239                 words *= info->var.yres_virtual;
 240                 if (info->var.rotate /* 180 */) {
 241                         words -= (words % 8); /* should be divisable by 8 */
 242                 }
 243         }
 244         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 245
 246         fbdev->regs->lcd_pwmdiv = 0;
 247         fbdev->regs->lcd_pwmhi = 0;
 248
 249         /* Resume controller */
 250         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 251         mdelay(10);
 252         au1100fb_fb_blank(VESA_NO_BLANKING, info);
 253
 254         return 0;
 255 }
 256
 257 /* fb_setcolreg
 258  * Set color in LCD palette.
 259  */
 260 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 261 {
 262         struct au1100fb_device *fbdev;
 263         u32 *palette;
 264         u32 value;
 265
 266         fbdev = to_au1100fb_device(fbi);
 267         palette = fbdev->regs->lcd_pallettebase;
 268
 269         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 270                 return -EINVAL;
 271
 272         if (fbi->var.grayscale) {
 273                 /* Convert color to grayscale */
 274                 red = green = blue =
 275                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 276         }
 277
 278         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 279                 /* Place color in the pseudopalette */
 280                 if (regno > 16)
 281                         return -EINVAL;
 282
 283                 palette = (u32*)fbi->pseudo_palette;
 284
 285                 red   >>= (16 - fbi->var.red.length);
 286                 green >>= (16 - fbi->var.green.length);
 287                 blue  >>= (16 - fbi->var.blue.length);
 288
 289                 value = (red   << fbi->var.red.offset)  |
 290                         (green << fbi->var.green.offset)|
 291                         (blue  << fbi->var.blue.offset);
 292                 value &= 0xFFFF;
 293
 294         } else if (panel_is_active(fbdev->panel)) {
 295                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 296                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 297                 value &= 0xFFFF;
 298
 299         } else if (panel_is_color(fbdev->panel)) {
 300                 /* COLOR STN MODE */
 301                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 302                         ((green >> 8) & 0x00F0) |
 303                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 304                 value &= 0xFFF;
 305         } else {
 306                 /* MONOCHROME MODE */
 307                 value = (green >> 12) & 0x000F;
 308                 value &= 0xF;
 309         }
 310
 311         palette[regno] = value;
 312
 313         return 0;
 314 }
 315
 316 /* fb_pan_display
 317  * Pan display in x and/or y as specified
 318  */
 319 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 320 {
 321         struct au1100fb_device *fbdev;
 322         int dy;
 323
 324         fbdev = to_au1100fb_device(fbi);
 325
 326         print_dbg("fb_pan_display %p %p", var, fbi);
 327
 328         if (!var || !fbdev) {
 329                 return -EINVAL;
 330         }
 331
 332         if (var->xoffset - fbi->var.xoffset) {
 333                 /* No support for X panning for now! */
 334                 return -EINVAL;
 335         }
 336
 337         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 338         dy = var->yoffset - fbi->var.yoffset;
 339         if (dy) {
 340
 341                 u32 dmaaddr;
 342
 343                 print_dbg("Panning screen of %d lines", dy);
 344
 345                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 346                 dmaaddr += (fbi->fix.line_length * dy);
 347
 348                 /* TODO: Wait for current frame to finished */
 349                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 350
 351                 if (panel_is_dual(fbdev->panel)) {
 352                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 353                         dmaaddr += (fbi->fix.line_length * dy);
 354                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 355         }
 356         }
 357         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 358
 359         return 0;
 360 }
 361
 362 /* fb_rotate
 363  * Rotate the display of this angle. This doesn't seems to be used by the core,
 364  * but as our hardware supports it, so why not implementing it...
 365  */
 366 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 367 {
 368         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 369
 370         print_dbg("fb_rotate %p %d", fbi, angle);
 371
 372         if (fbdev && (angle > 0) && !(angle % 90)) {
 373
 374                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 375
 376                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 377                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 378
 379                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 380         }
 381 }
 382
 383 /* fb_mmap
 384  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 385  * to allow the use of the TLB streaming flag (CCA=6)
 386  */
 387 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 388 {
 389         struct au1100fb_device *fbdev;
 390
 391         fbdev = to_au1100fb_device(fbi);
 392
 393         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 394         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 395
 396         return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
 397 }
 398
 399 static struct fb_ops au1100fb_ops =
 400 {
 401         .owner                  = THIS_MODULE,
 402         .fb_setcolreg           = au1100fb_fb_setcolreg,
 403         .fb_blank               = au1100fb_fb_blank,
 404         .fb_pan_display         = au1100fb_fb_pan_display,
 405         .fb_fillrect            = cfb_fillrect,
 406         .fb_copyarea            = cfb_copyarea,
 407         .fb_imageblit           = cfb_imageblit,
 408         .fb_rotate              = au1100fb_fb_rotate,
 409         .fb_mmap                = au1100fb_fb_mmap,
 410 };
 411
 412
 413 /*-------------------------------------------------------------------------*/
 414
 415 static int au1100fb_setup(struct au1100fb_device *fbdev)
 416 {
 417         char *this_opt, *options;
 418         int num_panels = ARRAY_SIZE(known_lcd_panels);
 419
 420         if (num_panels <= 0) {
 421                 print_err("No LCD panels supported by driver!");
 422                 return -ENODEV;
 423         }
 424
 425         if (fb_get_options(DRIVER_NAME, &options))
 426                 return -ENODEV;
 427         if (!options)
 428                 return -ENODEV;
 429
 430         while ((this_opt = strsep(&options, ",")) != NULL) {
 431                 /* Panel option */
 432                 if (!strncmp(this_opt, "panel:", 6)) {
 433                         int i;
 434                         this_opt += 6;
 435                         for (i = 0; i < num_panels; i++) {
 436                                 if (!strncmp(this_opt, known_lcd_panels[i].name,
 437                                              strlen(this_opt))) {
 438                                         fbdev->panel = &known_lcd_panels[i];
 439                                         fbdev->panel_idx = i;
 440                                         break;
 441                                 }
 442                         }
 443                         if (i >= num_panels) {
 444                                 print_warn("Panel '%s' not supported!", this_opt);
 445                                 return -ENODEV;
 446                         }
 447                 }
 448                 /* Unsupported option */
 449                 else
 450                         print_warn("Unsupported option \"%s\"", this_opt);
 451         }
 452
 453         print_info("Panel=%s", fbdev->panel->name);
 454
 455         return 0;
 456 }
 457
 458 static int __devinit au1100fb_drv_probe(struct platform_device *dev)
 459 {
 460         struct au1100fb_device *fbdev = NULL;
 461         struct resource *regs_res;
 462         unsigned long page;
 463         u32 sys_clksrc;
 464
 465         /* Allocate new device private */
 466         fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL);
 467         if (!fbdev) {
 468                 print_err("fail to allocate device private record");
 469                 return -ENOMEM;
 470         }
 471
 472         if (au1100fb_setup(fbdev))
 473                 goto failed;
 474
 475         platform_set_drvdata(dev, (void *)fbdev);
 476
 477         /* Allocate region for our registers and map them */
 478         regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 479         if (!regs_res) {
 480                 print_err("fail to retrieve registers resource");
 481                 return -EFAULT;
 482         }
 483
 484         au1100fb_fix.mmio_start = regs_res->start;
 485         au1100fb_fix.mmio_len = resource_size(regs_res);
 486
 487         if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len,
 488                                 DRIVER_NAME)) {
 489                 print_err("fail to lock memory region at 0x%08lx",
 490                                 au1100fb_fix.mmio_start);
 491                 return -EBUSY;
 492         }
 493
 494         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 495
 496         print_dbg("Register memory map at %p", fbdev->regs);
 497         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 498
 499         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 500         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 501                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 502
 503         fbdev->fb_mem = dma_alloc_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len),
 504                                         &fbdev->fb_phys, GFP_KERNEL);
 505         if (!fbdev->fb_mem) {
 506                 print_err("fail to allocate frambuffer (size: %dK))",
 507                           fbdev->fb_len / 1024);
 508                 return -ENOMEM;
 509         }
 510
 511         au1100fb_fix.smem_start = fbdev->fb_phys;
 512         au1100fb_fix.smem_len = fbdev->fb_len;
 513
 514         /*
 515          * Set page reserved so that mmap will work. This is necessary
 516          * since we'll be remapping normal memory.
 517          */
 518         for (page = (unsigned long)fbdev->fb_mem;
 519              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 520              page += PAGE_SIZE) {
 521 #if CONFIG_DMA_NONCOHERENT
 522                 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
 523 #else
 524                 SetPageReserved(virt_to_page(page));
 525 #endif
 526         }
 527
 528         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 529         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 530
 531         /* Setup LCD clock to AUX (48 MHz) */
 532         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 533         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 534
 535         /* load the panel info into the var struct */
 536         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 537         au1100fb_var.xres = fbdev->panel->xres;
 538         au1100fb_var.xres_virtual = au1100fb_var.xres;
 539         au1100fb_var.yres = fbdev->panel->yres;
 540         au1100fb_var.yres_virtual = au1100fb_var.yres;
 541
 542         fbdev->info.screen_base = fbdev->fb_mem;
 543         fbdev->info.fbops = &au1100fb_ops;
 544         fbdev->info.fix = au1100fb_fix;
 545
 546         if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {
 547                 return -ENOMEM;
 548         }
 549
 550         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 551                 print_err("Fail to allocate colormap (%d entries)",
 552                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 553                 kfree(fbdev->info.pseudo_palette);
 554                 return -EFAULT;
 555         }
 556
 557         fbdev->info.var = au1100fb_var;
 558
 559         /* Set h/w registers */
 560         au1100fb_setmode(fbdev);
 561
 562         /* Register new framebuffer */
 563         if (register_framebuffer(&fbdev->info) < 0) {
 564                 print_err("cannot register new framebuffer");
 565                 goto failed;
 566         }
 567
 568         return 0;
 569
 570 failed:
 571         if (fbdev->regs) {
 572                 release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 573         }
 574         if (fbdev->fb_mem) {
 575                 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 576                                      fbdev->fb_phys);
 577         }
 578         if (fbdev->info.cmap.len != 0) {
 579                 fb_dealloc_cmap(&fbdev->info.cmap);
 580         }
 581         kfree(fbdev);
 582         platform_set_drvdata(dev, NULL);
 583
 584         return 0;
 585 }
 586
 587 int au1100fb_drv_remove(struct platform_device *dev)
 588 {
 589         struct au1100fb_device *fbdev = NULL;
 590
 591         if (!dev)
 592                 return -ENODEV;
 593
 594         fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
 595
 596 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 597         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 598 #endif
 599         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 600
 601         /* Clean up all probe data */
 602         unregister_framebuffer(&fbdev->info);
 603
 604         release_mem_region(fbdev->regs_phys, fbdev->regs_len);
 605
 606         dma_free_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem,
 607                           fbdev->fb_phys);
 608
 609         fb_dealloc_cmap(&fbdev->info.cmap);
 610         kfree(fbdev->info.pseudo_palette);
 611         kfree((void*)fbdev);
 612
 613         return 0;
 614 }
 615
 616 #ifdef CONFIG_PM
 617 static u32 sys_clksrc;
 618 static struct au1100fb_regs fbregs;
 619
 620 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 621 {
 622         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 623
 624         if (!fbdev)
 625                 return 0;
 626
 627         /* Save the clock source state */
 628         sys_clksrc = au_readl(SYS_CLKSRC);
 629
 630         /* Blank the LCD */
 631         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 632
 633         /* Stop LCD clocking */
 634         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 635
 636         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 637
 638         return 0;
 639 }
 640
 641 int au1100fb_drv_resume(struct platform_device *dev)
 642 {
 643         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 644
 645         if (!fbdev)
 646                 return 0;
 647
 648         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 649
 650         /* Restart LCD clocking */
 651         au_writel(sys_clksrc, SYS_CLKSRC);
 652
 653         /* Unblank the LCD */
 654         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 655
 656         return 0;
 657 }
 658 #else
 659 #define au1100fb_drv_suspend NULL
 660 #define au1100fb_drv_resume NULL
 661 #endif
 662
 663 static struct platform_driver au1100fb_driver = {
 664         .driver = {
 665                 .name           = "au1100-lcd",
 666                 .owner          = THIS_MODULE,
 667         },
 668         .probe          = au1100fb_drv_probe,
 669         .remove         = au1100fb_drv_remove,
 670         .suspend        = au1100fb_drv_suspend,
 671         .resume         = au1100fb_drv_resume,
 672 };
 673
 674 static int __init au1100fb_load(void)
 675 {
 676         return platform_driver_register(&au1100fb_driver);
 677 }
 678
 679 static void __exit au1100fb_unload(void)
 680 {
 681         platform_driver_unregister(&au1100fb_driver);
 682 }
 683
 684 module_init(au1100fb_load);
 685 module_exit(au1100fb_unload);
 686
 687 MODULE_DESCRIPTION(DRIVER_DESC);
 688 MODULE_LICENSE("GPL");