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 #define DRIVER_NAME "au1100fb"
  64 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
  65
  66 #define to_au1100fb_device(_info) \
  67           (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
  68
  69 /* Bitfields format supported by the controller. Note that the order of formats
  70  * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
  71  * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
  72  */
  73 struct fb_bitfield rgb_bitfields[][4] =
  74 {
  75         /*     Red,        Green,        Blue,       Transp   */
  76         { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  77         { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
  78         { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
  79         { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
  80         { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
  81
  82         /* The last is used to describe 12bpp format */
  83         { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
  84 };
  85
  86 static struct fb_fix_screeninfo au1100fb_fix = {
  87         .id             = "AU1100 FB",
  88         .xpanstep       = 1,
  89         .ypanstep       = 1,
  90         .type           = FB_TYPE_PACKED_PIXELS,
  91         .accel          = FB_ACCEL_NONE,
  92 };
  93
  94 static struct fb_var_screeninfo au1100fb_var = {
  95         .activate       = FB_ACTIVATE_NOW,
  96         .height         = -1,
  97         .width          = -1,
  98         .vmode          = FB_VMODE_NONINTERLACED,
  99 };
 100
 101 /* fb_blank
 102  * Blank the screen. Depending on the mode, the screen will be
 103  * activated with the backlight color, or desactivated
 104  */
 105 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 106 {
 107         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 108
 109         print_dbg("fb_blank %d %p", blank_mode, fbi);
 110
 111         switch (blank_mode) {
 112
 113         case VESA_NO_BLANKING:
 114                 /* Turn on panel */
 115                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 116                 au_sync();
 117                 break;
 118
 119         case VESA_VSYNC_SUSPEND:
 120         case VESA_HSYNC_SUSPEND:
 121         case VESA_POWERDOWN:
 122                 /* Turn off panel */
 123                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 124                 au_sync();
 125                 break;
 126         default:
 127                 break;
 128
 129         }
 130         return 0;
 131 }
 132
 133 /*
 134  * Set hardware with var settings. This will enable the controller with a specific
 135  * mode, normally validated with the fb_check_var method
 136          */
 137 int au1100fb_setmode(struct au1100fb_device *fbdev)
 138 {
 139         struct fb_info *info = &fbdev->info;
 140         u32 words;
 141         int index;
 142
 143         if (!fbdev)
 144                 return -EINVAL;
 145
 146         /* Update var-dependent FB info */
 147         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 148                 if (info->var.bits_per_pixel <= 8) {
 149                         /* palettized */
 150                         info->var.red.offset    = 0;
 151                         info->var.red.length    = info->var.bits_per_pixel;
 152                         info->var.red.msb_right = 0;
 153
 154                         info->var.green.offset  = 0;
 155                         info->var.green.length  = info->var.bits_per_pixel;
 156                         info->var.green.msb_right = 0;
 157
 158                         info->var.blue.offset   = 0;
 159                         info->var.blue.length   = info->var.bits_per_pixel;
 160                         info->var.blue.msb_right = 0;
 161
 162                         info->var.transp.offset = 0;
 163                         info->var.transp.length = 0;
 164                         info->var.transp.msb_right = 0;
 165
 166                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 167                         info->fix.line_length = info->var.xres_virtual /
 168                                                         (8/info->var.bits_per_pixel);
 169                 } else {
 170                         /* non-palettized */
 171                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 172                         info->var.red = rgb_bitfields[index][0];
 173                         info->var.green = rgb_bitfields[index][1];
 174                         info->var.blue = rgb_bitfields[index][2];
 175                         info->var.transp = rgb_bitfields[index][3];
 176
 177                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 178                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 179                 }
 180         } else {
 181                 /* mono */
 182                 info->fix.visual = FB_VISUAL_MONO10;
 183                 info->fix.line_length = info->var.xres_virtual / 8;
 184         }
 185
 186         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 187         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 188                                 >> LCD_CONTROL_SM_BIT) * 90;
 189
 190         /* Determine BPP mode and format */
 191         fbdev->regs->lcd_control = fbdev->panel->control_base;
 192         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 193         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 194         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 195         fbdev->regs->lcd_intenable = 0;
 196         fbdev->regs->lcd_intstatus = 0;
 197         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 198
 199         if (panel_is_dual(fbdev->panel)) {
 200                 /* Second panel display seconf half of screen if possible,
 201                  * otherwise display the same as the first panel */
 202                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 203                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 204                                                           (info->fix.line_length *
 205                                                           (info->var.yres_virtual >> 1)));
 206                 } else {
 207                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 208                 }
 209         }
 210
 211         words = info->fix.line_length / sizeof(u32);
 212         if (!info->var.rotate || (info->var.rotate == 180)) {
 213                 words *= info->var.yres_virtual;
 214                 if (info->var.rotate /* 180 */) {
 215                         words -= (words % 8); /* should be divisable by 8 */
 216                 }
 217         }
 218         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 219
 220         fbdev->regs->lcd_pwmdiv = 0;
 221         fbdev->regs->lcd_pwmhi = 0;
 222
 223         /* Resume controller */
 224         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 225         mdelay(10);
 226         au1100fb_fb_blank(VESA_NO_BLANKING, info);
 227
 228         return 0;
 229 }
 230
 231 /* fb_setcolreg
 232  * Set color in LCD palette.
 233  */
 234 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 235 {
 236         struct au1100fb_device *fbdev;
 237         u32 *palette;
 238         u32 value;
 239
 240         fbdev = to_au1100fb_device(fbi);
 241         palette = fbdev->regs->lcd_pallettebase;
 242
 243         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 244                 return -EINVAL;
 245
 246         if (fbi->var.grayscale) {
 247                 /* Convert color to grayscale */
 248                 red = green = blue =
 249                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 250         }
 251
 252         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 253                 /* Place color in the pseudopalette */
 254                 if (regno > 16)
 255                         return -EINVAL;
 256
 257                 palette = (u32*)fbi->pseudo_palette;
 258
 259                 red   >>= (16 - fbi->var.red.length);
 260                 green >>= (16 - fbi->var.green.length);
 261                 blue  >>= (16 - fbi->var.blue.length);
 262
 263                 value = (red   << fbi->var.red.offset)  |
 264                         (green << fbi->var.green.offset)|
 265                         (blue  << fbi->var.blue.offset);
 266                 value &= 0xFFFF;
 267
 268         } else if (panel_is_active(fbdev->panel)) {
 269                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 270                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 271                 value &= 0xFFFF;
 272
 273         } else if (panel_is_color(fbdev->panel)) {
 274                 /* COLOR STN MODE */
 275                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 276                         ((green >> 8) & 0x00F0) |
 277                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 278                 value &= 0xFFF;
 279         } else {
 280                 /* MONOCHROME MODE */
 281                 value = (green >> 12) & 0x000F;
 282                 value &= 0xF;
 283         }
 284
 285         palette[regno] = value;
 286
 287         return 0;
 288 }
 289
 290 /* fb_pan_display
 291  * Pan display in x and/or y as specified
 292  */
 293 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 294 {
 295         struct au1100fb_device *fbdev;
 296         int dy;
 297
 298         fbdev = to_au1100fb_device(fbi);
 299
 300         print_dbg("fb_pan_display %p %p", var, fbi);
 301
 302         if (!var || !fbdev) {
 303                 return -EINVAL;
 304         }
 305
 306         if (var->xoffset - fbi->var.xoffset) {
 307                 /* No support for X panning for now! */
 308                 return -EINVAL;
 309         }
 310
 311         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 312         dy = var->yoffset - fbi->var.yoffset;
 313         if (dy) {
 314
 315                 u32 dmaaddr;
 316
 317                 print_dbg("Panning screen of %d lines", dy);
 318
 319                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 320                 dmaaddr += (fbi->fix.line_length * dy);
 321
 322                 /* TODO: Wait for current frame to finished */
 323                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 324
 325                 if (panel_is_dual(fbdev->panel)) {
 326                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 327                         dmaaddr += (fbi->fix.line_length * dy);
 328                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 329         }
 330         }
 331         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 332
 333         return 0;
 334 }
 335
 336 /* fb_rotate
 337  * Rotate the display of this angle. This doesn't seems to be used by the core,
 338  * but as our hardware supports it, so why not implementing it...
 339  */
 340 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 341 {
 342         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 343
 344         print_dbg("fb_rotate %p %d", fbi, angle);
 345
 346         if (fbdev && (angle > 0) && !(angle % 90)) {
 347
 348                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 349
 350                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 351                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 352
 353                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 354         }
 355 }
 356
 357 /* fb_mmap
 358  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 359  * to allow the use of the TLB streaming flag (CCA=6)
 360  */
 361 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 362 {
 363         struct au1100fb_device *fbdev;
 364         unsigned int len;
 365         unsigned long start=0, off;
 366
 367         fbdev = to_au1100fb_device(fbi);
 368
 369         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 370                 return -EINVAL;
 371         }
 372
 373         start = fbdev->fb_phys & PAGE_MASK;
 374         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 375
 376         off = vma->vm_pgoff << PAGE_SHIFT;
 377
 378         if ((vma->vm_end - vma->vm_start + off) > len) {
 379                 return -EINVAL;
 380         }
 381
 382         off += start;
 383         vma->vm_pgoff = off >> PAGE_SHIFT;
 384
 385         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 386         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 387
 388         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 389                                 vma->vm_end - vma->vm_start,
 390                                 vma->vm_page_prot)) {
 391                 return -EAGAIN;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static struct fb_ops au1100fb_ops =
 398 {
 399         .owner                  = THIS_MODULE,
 400         .fb_setcolreg           = au1100fb_fb_setcolreg,
 401         .fb_blank               = au1100fb_fb_blank,
 402         .fb_pan_display         = au1100fb_fb_pan_display,
 403         .fb_fillrect            = cfb_fillrect,
 404         .fb_copyarea            = cfb_copyarea,
 405         .fb_imageblit           = cfb_imageblit,
 406         .fb_rotate              = au1100fb_fb_rotate,
 407         .fb_mmap                = au1100fb_fb_mmap,
 408 };
 409
 410
 411 /*-------------------------------------------------------------------------*/
 412
 413 static int au1100fb_setup(struct au1100fb_device *fbdev)
 414 {
 415         char *this_opt, *options;
 416         int num_panels = ARRAY_SIZE(known_lcd_panels);
 417
 418         if (num_panels <= 0) {
 419                 print_err("No LCD panels supported by driver!");
 420                 return -ENODEV;
 421         }
 422
 423         if (fb_get_options(DRIVER_NAME, &options))
 424                 return -ENODEV;
 425         if (!options)
 426                 return -ENODEV;
 427
 428         while ((this_opt = strsep(&options, ",")) != NULL) {
 429                 /* Panel option */
 430                 if (!strncmp(this_opt, "panel:", 6)) {
 431                         int i;
 432                         this_opt += 6;
 433                         for (i = 0; i < num_panels; i++) {
 434                                 if (!strncmp(this_opt, known_lcd_panels[i].name,
 435                                              strlen(this_opt))) {
 436                                         fbdev->panel = &known_lcd_panels[i];
 437                                         fbdev->panel_idx = i;
 438                                         break;
 439                                 }
 440                         }
 441                         if (i >= num_panels) {
 442                                 print_warn("Panel '%s' not supported!", this_opt);
 443                                 return -ENODEV;
 444                         }
 445                 }
 446                 /* Unsupported option */
 447                 else
 448                         print_warn("Unsupported option \"%s\"", this_opt);
 449         }
 450
 451         print_info("Panel=%s", fbdev->panel->name);
 452
 453         return 0;
 454 }
 455
 456 static int au1100fb_drv_probe(struct platform_device *dev)
 457 {
 458         struct au1100fb_device *fbdev = NULL;
 459         struct resource *regs_res;
 460         unsigned long page;
 461         u32 sys_clksrc;
 462
 463         /* Allocate new device private */
 464         fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
 465                              GFP_KERNEL);
 466         if (!fbdev) {
 467                 print_err("fail to allocate device private record");
 468                 return -ENOMEM;
 469         }
 470
 471         if (au1100fb_setup(fbdev))
 472                 goto failed;
 473
 474         platform_set_drvdata(dev, (void *)fbdev);
 475
 476         /* Allocate region for our registers and map them */
 477         regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 478         if (!regs_res) {
 479                 print_err("fail to retrieve registers resource");
 480                 return -EFAULT;
 481         }
 482
 483         au1100fb_fix.mmio_start = regs_res->start;
 484         au1100fb_fix.mmio_len = resource_size(regs_res);
 485
 486         if (!devm_request_mem_region(&dev->dev,
 487                                      au1100fb_fix.mmio_start,
 488                                      au1100fb_fix.mmio_len,
 489                                      DRIVER_NAME)) {
 490                 print_err("fail to lock memory region at 0x%08lx",
 491                                 au1100fb_fix.mmio_start);
 492                 return -EBUSY;
 493         }
 494
 495         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 496
 497         print_dbg("Register memory map at %p", fbdev->regs);
 498         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 499
 500         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 501         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 502                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 503
 504         fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
 505                                             PAGE_ALIGN(fbdev->fb_len),
 506                                             &fbdev->fb_phys, GFP_KERNEL);
 507         if (!fbdev->fb_mem) {
 508                 print_err("fail to allocate frambuffer (size: %dK))",
 509                           fbdev->fb_len / 1024);
 510                 return -ENOMEM;
 511         }
 512
 513         au1100fb_fix.smem_start = fbdev->fb_phys;
 514         au1100fb_fix.smem_len = fbdev->fb_len;
 515
 516         /*
 517          * Set page reserved so that mmap will work. This is necessary
 518          * since we'll be remapping normal memory.
 519          */
 520         for (page = (unsigned long)fbdev->fb_mem;
 521              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 522              page += PAGE_SIZE) {
 523 #ifdef CONFIG_DMA_NONCOHERENT
 524                 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
 525 #else
 526                 SetPageReserved(virt_to_page(page));
 527 #endif
 528         }
 529
 530         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 531         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 532
 533         /* Setup LCD clock to AUX (48 MHz) */
 534         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 535         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 536
 537         /* load the panel info into the var struct */
 538         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 539         au1100fb_var.xres = fbdev->panel->xres;
 540         au1100fb_var.xres_virtual = au1100fb_var.xres;
 541         au1100fb_var.yres = fbdev->panel->yres;
 542         au1100fb_var.yres_virtual = au1100fb_var.yres;
 543
 544         fbdev->info.screen_base = fbdev->fb_mem;
 545         fbdev->info.fbops = &au1100fb_ops;
 546         fbdev->info.fix = au1100fb_fix;
 547
 548         fbdev->info.pseudo_palette =
 549                 devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
 550         if (!fbdev->info.pseudo_palette)
 551                 return -ENOMEM;
 552
 553         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 554                 print_err("Fail to allocate colormap (%d entries)",
 555                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 556                 return -EFAULT;
 557         }
 558
 559         fbdev->info.var = au1100fb_var;
 560
 561         /* Set h/w registers */
 562         au1100fb_setmode(fbdev);
 563
 564         /* Register new framebuffer */
 565         if (register_framebuffer(&fbdev->info) < 0) {
 566                 print_err("cannot register new framebuffer");
 567                 goto failed;
 568         }
 569
 570         return 0;
 571
 572 failed:
 573         if (fbdev->fb_mem) {
 574                 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 575                                      fbdev->fb_phys);
 576         }
 577         if (fbdev->info.cmap.len != 0) {
 578                 fb_dealloc_cmap(&fbdev->info.cmap);
 579         }
 580
 581         return -ENODEV;
 582 }
 583
 584 int au1100fb_drv_remove(struct platform_device *dev)
 585 {
 586         struct au1100fb_device *fbdev = NULL;
 587
 588         if (!dev)
 589                 return -ENODEV;
 590
 591         fbdev = platform_get_drvdata(dev);
 592
 593 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 594         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 595 #endif
 596         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 597
 598         /* Clean up all probe data */
 599         unregister_framebuffer(&fbdev->info);
 600
 601         fb_dealloc_cmap(&fbdev->info.cmap);
 602
 603         return 0;
 604 }
 605
 606 #ifdef CONFIG_PM
 607 static u32 sys_clksrc;
 608 static struct au1100fb_regs fbregs;
 609
 610 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 611 {
 612         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 613
 614         if (!fbdev)
 615                 return 0;
 616
 617         /* Save the clock source state */
 618         sys_clksrc = au_readl(SYS_CLKSRC);
 619
 620         /* Blank the LCD */
 621         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 622
 623         /* Stop LCD clocking */
 624         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 625
 626         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 627
 628         return 0;
 629 }
 630
 631 int au1100fb_drv_resume(struct platform_device *dev)
 632 {
 633         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 634
 635         if (!fbdev)
 636                 return 0;
 637
 638         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 639
 640         /* Restart LCD clocking */
 641         au_writel(sys_clksrc, SYS_CLKSRC);
 642
 643         /* Unblank the LCD */
 644         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 645
 646         return 0;
 647 }
 648 #else
 649 #define au1100fb_drv_suspend NULL
 650 #define au1100fb_drv_resume NULL
 651 #endif
 652
 653 static struct platform_driver au1100fb_driver = {
 654         .driver = {
 655                 .name           = "au1100-lcd",
 656                 .owner          = THIS_MODULE,
 657         },
 658         .probe          = au1100fb_drv_probe,
 659         .remove         = au1100fb_drv_remove,
 660         .suspend        = au1100fb_drv_suspend,
 661         .resume         = au1100fb_drv_resume,
 662 };
 663 module_platform_driver(au1100fb_driver);
 664
 665 MODULE_DESCRIPTION(DRIVER_DESC);
 666 MODULE_LICENSE("GPL");