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 #ifdef CONFIG_MIPS_PB1100
 117                         if (fbdev->panel_idx == 1) {
 118                                 au_writew(au_readw(PB1100_G_CONTROL)
 119                                           | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 120                         PB1100_G_CONTROL);
 121                         }
 122 #endif
 123                 au_sync();
 124                 break;
 125
 126         case VESA_VSYNC_SUSPEND:
 127         case VESA_HSYNC_SUSPEND:
 128         case VESA_POWERDOWN:
 129                         /* Turn off panel */
 130                         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 131 #ifdef CONFIG_MIPS_PB1100
 132                         if (fbdev->panel_idx == 1) {
 133                                 au_writew(au_readw(PB1100_G_CONTROL)
 134                                           & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
 135                         PB1100_G_CONTROL);
 136                         }
 137 #endif
 138                 au_sync();
 139                 break;
 140         default:
 141                 break;
 142
 143         }
 144         return 0;
 145 }
 146
 147 /*
 148  * Set hardware with var settings. This will enable the controller with a specific
 149  * mode, normally validated with the fb_check_var method
 150          */
 151 int au1100fb_setmode(struct au1100fb_device *fbdev)
 152 {
 153         struct fb_info *info = &fbdev->info;
 154         u32 words;
 155         int index;
 156
 157         if (!fbdev)
 158                 return -EINVAL;
 159
 160         /* Update var-dependent FB info */
 161         if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
 162                 if (info->var.bits_per_pixel <= 8) {
 163                         /* palettized */
 164                         info->var.red.offset    = 0;
 165                         info->var.red.length    = info->var.bits_per_pixel;
 166                         info->var.red.msb_right = 0;
 167
 168                         info->var.green.offset  = 0;
 169                         info->var.green.length  = info->var.bits_per_pixel;
 170                         info->var.green.msb_right = 0;
 171
 172                         info->var.blue.offset   = 0;
 173                         info->var.blue.length   = info->var.bits_per_pixel;
 174                         info->var.blue.msb_right = 0;
 175
 176                         info->var.transp.offset = 0;
 177                         info->var.transp.length = 0;
 178                         info->var.transp.msb_right = 0;
 179
 180                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 181                         info->fix.line_length = info->var.xres_virtual /
 182                                                         (8/info->var.bits_per_pixel);
 183                 } else {
 184                         /* non-palettized */
 185                         index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
 186                         info->var.red = rgb_bitfields[index][0];
 187                         info->var.green = rgb_bitfields[index][1];
 188                         info->var.blue = rgb_bitfields[index][2];
 189                         info->var.transp = rgb_bitfields[index][3];
 190
 191                         info->fix.visual = FB_VISUAL_TRUECOLOR;
 192                         info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
 193                 }
 194         } else {
 195                 /* mono */
 196                 info->fix.visual = FB_VISUAL_MONO10;
 197                 info->fix.line_length = info->var.xres_virtual / 8;
 198         }
 199
 200         info->screen_size = info->fix.line_length * info->var.yres_virtual;
 201         info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
 202                                 >> LCD_CONTROL_SM_BIT) * 90;
 203
 204         /* Determine BPP mode and format */
 205         fbdev->regs->lcd_control = fbdev->panel->control_base;
 206         fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
 207         fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
 208         fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
 209         fbdev->regs->lcd_intenable = 0;
 210         fbdev->regs->lcd_intstatus = 0;
 211         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
 212
 213         if (panel_is_dual(fbdev->panel)) {
 214                 /* Second panel display seconf half of screen if possible,
 215                  * otherwise display the same as the first panel */
 216                 if (info->var.yres_virtual >= (info->var.yres << 1)) {
 217                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
 218                                                           (info->fix.line_length *
 219                                                           (info->var.yres_virtual >> 1)));
 220                 } else {
 221                         fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
 222                 }
 223         }
 224
 225         words = info->fix.line_length / sizeof(u32);
 226         if (!info->var.rotate || (info->var.rotate == 180)) {
 227                 words *= info->var.yres_virtual;
 228                 if (info->var.rotate /* 180 */) {
 229                         words -= (words % 8); /* should be divisable by 8 */
 230                 }
 231         }
 232         fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
 233
 234         fbdev->regs->lcd_pwmdiv = 0;
 235         fbdev->regs->lcd_pwmhi = 0;
 236
 237         /* Resume controller */
 238         fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 239         mdelay(10);
 240         au1100fb_fb_blank(VESA_NO_BLANKING, info);
 241
 242         return 0;
 243 }
 244
 245 /* fb_setcolreg
 246  * Set color in LCD palette.
 247  */
 248 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
 249 {
 250         struct au1100fb_device *fbdev;
 251         u32 *palette;
 252         u32 value;
 253
 254         fbdev = to_au1100fb_device(fbi);
 255         palette = fbdev->regs->lcd_pallettebase;
 256
 257         if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
 258                 return -EINVAL;
 259
 260         if (fbi->var.grayscale) {
 261                 /* Convert color to grayscale */
 262                 red = green = blue =
 263                         (19595 * red + 38470 * green + 7471 * blue) >> 16;
 264         }
 265
 266         if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
 267                 /* Place color in the pseudopalette */
 268                 if (regno > 16)
 269                         return -EINVAL;
 270
 271                 palette = (u32*)fbi->pseudo_palette;
 272
 273                 red   >>= (16 - fbi->var.red.length);
 274                 green >>= (16 - fbi->var.green.length);
 275                 blue  >>= (16 - fbi->var.blue.length);
 276
 277                 value = (red   << fbi->var.red.offset)  |
 278                         (green << fbi->var.green.offset)|
 279                         (blue  << fbi->var.blue.offset);
 280                 value &= 0xFFFF;
 281
 282         } else if (panel_is_active(fbdev->panel)) {
 283                 /* COLOR TFT PALLETTIZED (use RGB 565) */
 284                 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
 285                 value &= 0xFFFF;
 286
 287         } else if (panel_is_color(fbdev->panel)) {
 288                 /* COLOR STN MODE */
 289                 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
 290                         ((green >> 8) & 0x00F0) |
 291                         (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
 292                 value &= 0xFFF;
 293         } else {
 294                 /* MONOCHROME MODE */
 295                 value = (green >> 12) & 0x000F;
 296                 value &= 0xF;
 297         }
 298
 299         palette[regno] = value;
 300
 301         return 0;
 302 }
 303
 304 /* fb_pan_display
 305  * Pan display in x and/or y as specified
 306  */
 307 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
 308 {
 309         struct au1100fb_device *fbdev;
 310         int dy;
 311
 312         fbdev = to_au1100fb_device(fbi);
 313
 314         print_dbg("fb_pan_display %p %p", var, fbi);
 315
 316         if (!var || !fbdev) {
 317                 return -EINVAL;
 318         }
 319
 320         if (var->xoffset - fbi->var.xoffset) {
 321                 /* No support for X panning for now! */
 322                 return -EINVAL;
 323         }
 324
 325         print_dbg("fb_pan_display 2 %p %p", var, fbi);
 326         dy = var->yoffset - fbi->var.yoffset;
 327         if (dy) {
 328
 329                 u32 dmaaddr;
 330
 331                 print_dbg("Panning screen of %d lines", dy);
 332
 333                 dmaaddr = fbdev->regs->lcd_dmaaddr0;
 334                 dmaaddr += (fbi->fix.line_length * dy);
 335
 336                 /* TODO: Wait for current frame to finished */
 337                 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 338
 339                 if (panel_is_dual(fbdev->panel)) {
 340                         dmaaddr = fbdev->regs->lcd_dmaaddr1;
 341                         dmaaddr += (fbi->fix.line_length * dy);
 342                         fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
 343         }
 344         }
 345         print_dbg("fb_pan_display 3 %p %p", var, fbi);
 346
 347         return 0;
 348 }
 349
 350 /* fb_rotate
 351  * Rotate the display of this angle. This doesn't seems to be used by the core,
 352  * but as our hardware supports it, so why not implementing it...
 353  */
 354 void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
 355 {
 356         struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
 357
 358         print_dbg("fb_rotate %p %d", fbi, angle);
 359
 360         if (fbdev && (angle > 0) && !(angle % 90)) {
 361
 362                 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 363
 364                 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
 365                 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
 366
 367                 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
 368         }
 369 }
 370
 371 /* fb_mmap
 372  * Map video memory in user space. We don't use the generic fb_mmap method mainly
 373  * to allow the use of the TLB streaming flag (CCA=6)
 374  */
 375 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 376 {
 377         struct au1100fb_device *fbdev;
 378         unsigned int len;
 379         unsigned long start=0, off;
 380
 381         fbdev = to_au1100fb_device(fbi);
 382
 383         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
 384                 return -EINVAL;
 385         }
 386
 387         start = fbdev->fb_phys & PAGE_MASK;
 388         len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);
 389
 390         off = vma->vm_pgoff << PAGE_SHIFT;
 391
 392         if ((vma->vm_end - vma->vm_start + off) > len) {
 393                 return -EINVAL;
 394         }
 395
 396         off += start;
 397         vma->vm_pgoff = off >> PAGE_SHIFT;
 398
 399         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 400         pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 401
 402         vma->vm_flags |= VM_IO;
 403
 404         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 405                                 vma->vm_end - vma->vm_start,
 406                                 vma->vm_page_prot)) {
 407                 return -EAGAIN;
 408         }
 409
 410         return 0;
 411 }
 412
 413 static struct fb_ops au1100fb_ops =
 414 {
 415         .owner                  = THIS_MODULE,
 416         .fb_setcolreg           = au1100fb_fb_setcolreg,
 417         .fb_blank               = au1100fb_fb_blank,
 418         .fb_pan_display         = au1100fb_fb_pan_display,
 419         .fb_fillrect            = cfb_fillrect,
 420         .fb_copyarea            = cfb_copyarea,
 421         .fb_imageblit           = cfb_imageblit,
 422         .fb_rotate              = au1100fb_fb_rotate,
 423         .fb_mmap                = au1100fb_fb_mmap,
 424 };
 425
 426
 427 /*-------------------------------------------------------------------------*/
 428
 429 static int au1100fb_setup(struct au1100fb_device *fbdev)
 430 {
 431         char *this_opt, *options;
 432         int num_panels = ARRAY_SIZE(known_lcd_panels);
 433
 434         if (num_panels <= 0) {
 435                 print_err("No LCD panels supported by driver!");
 436                 return -ENODEV;
 437         }
 438
 439         if (fb_get_options(DRIVER_NAME, &options))
 440                 return -ENODEV;
 441         if (!options)
 442                 return -ENODEV;
 443
 444         while ((this_opt = strsep(&options, ",")) != NULL) {
 445                 /* Panel option */
 446                 if (!strncmp(this_opt, "panel:", 6)) {
 447                         int i;
 448                         this_opt += 6;
 449                         for (i = 0; i < num_panels; i++) {
 450                                 if (!strncmp(this_opt, known_lcd_panels[i].name,
 451                                              strlen(this_opt))) {
 452                                         fbdev->panel = &known_lcd_panels[i];
 453                                         fbdev->panel_idx = i;
 454                                         break;
 455                                 }
 456                         }
 457                         if (i >= num_panels) {
 458                                 print_warn("Panel '%s' not supported!", this_opt);
 459                                 return -ENODEV;
 460                         }
 461                 }
 462                 /* Unsupported option */
 463                 else
 464                         print_warn("Unsupported option \"%s\"", this_opt);
 465         }
 466
 467         print_info("Panel=%s", fbdev->panel->name);
 468
 469         return 0;
 470 }
 471
 472 static int au1100fb_drv_probe(struct platform_device *dev)
 473 {
 474         struct au1100fb_device *fbdev = NULL;
 475         struct resource *regs_res;
 476         unsigned long page;
 477         u32 sys_clksrc;
 478
 479         /* Allocate new device private */
 480         fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
 481                              GFP_KERNEL);
 482         if (!fbdev) {
 483                 print_err("fail to allocate device private record");
 484                 return -ENOMEM;
 485         }
 486
 487         if (au1100fb_setup(fbdev))
 488                 goto failed;
 489
 490         platform_set_drvdata(dev, (void *)fbdev);
 491
 492         /* Allocate region for our registers and map them */
 493         regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 494         if (!regs_res) {
 495                 print_err("fail to retrieve registers resource");
 496                 return -EFAULT;
 497         }
 498
 499         au1100fb_fix.mmio_start = regs_res->start;
 500         au1100fb_fix.mmio_len = resource_size(regs_res);
 501
 502         if (!devm_request_mem_region(&dev->dev,
 503                                      au1100fb_fix.mmio_start,
 504                                      au1100fb_fix.mmio_len,
 505                                      DRIVER_NAME)) {
 506                 print_err("fail to lock memory region at 0x%08lx",
 507                                 au1100fb_fix.mmio_start);
 508                 return -EBUSY;
 509         }
 510
 511         fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 512
 513         print_dbg("Register memory map at %p", fbdev->regs);
 514         print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 515
 516         /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 517         fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 518                         (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 519
 520         fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
 521                                             PAGE_ALIGN(fbdev->fb_len),
 522                                             &fbdev->fb_phys, GFP_KERNEL);
 523         if (!fbdev->fb_mem) {
 524                 print_err("fail to allocate frambuffer (size: %dK))",
 525                           fbdev->fb_len / 1024);
 526                 return -ENOMEM;
 527         }
 528
 529         au1100fb_fix.smem_start = fbdev->fb_phys;
 530         au1100fb_fix.smem_len = fbdev->fb_len;
 531
 532         /*
 533          * Set page reserved so that mmap will work. This is necessary
 534          * since we'll be remapping normal memory.
 535          */
 536         for (page = (unsigned long)fbdev->fb_mem;
 537              page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 538              page += PAGE_SIZE) {
 539 #ifdef CONFIG_DMA_NONCOHERENT
 540                 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
 541 #else
 542                 SetPageReserved(virt_to_page(page));
 543 #endif
 544         }
 545
 546         print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 547         print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 548
 549         /* Setup LCD clock to AUX (48 MHz) */
 550         sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 551         au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 552
 553         /* load the panel info into the var struct */
 554         au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 555         au1100fb_var.xres = fbdev->panel->xres;
 556         au1100fb_var.xres_virtual = au1100fb_var.xres;
 557         au1100fb_var.yres = fbdev->panel->yres;
 558         au1100fb_var.yres_virtual = au1100fb_var.yres;
 559
 560         fbdev->info.screen_base = fbdev->fb_mem;
 561         fbdev->info.fbops = &au1100fb_ops;
 562         fbdev->info.fix = au1100fb_fix;
 563
 564         fbdev->info.pseudo_palette =
 565                 devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
 566         if (!fbdev->info.pseudo_palette)
 567                 return -ENOMEM;
 568
 569         if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 570                 print_err("Fail to allocate colormap (%d entries)",
 571                            AU1100_LCD_NBR_PALETTE_ENTRIES);
 572                 return -EFAULT;
 573         }
 574
 575         fbdev->info.var = au1100fb_var;
 576
 577         /* Set h/w registers */
 578         au1100fb_setmode(fbdev);
 579
 580         /* Register new framebuffer */
 581         if (register_framebuffer(&fbdev->info) < 0) {
 582                 print_err("cannot register new framebuffer");
 583                 goto failed;
 584         }
 585
 586         return 0;
 587
 588 failed:
 589         if (fbdev->fb_mem) {
 590                 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 591                                      fbdev->fb_phys);
 592         }
 593         if (fbdev->info.cmap.len != 0) {
 594                 fb_dealloc_cmap(&fbdev->info.cmap);
 595         }
 596         platform_set_drvdata(dev, NULL);
 597
 598         return -ENODEV;
 599 }
 600
 601 int au1100fb_drv_remove(struct platform_device *dev)
 602 {
 603         struct au1100fb_device *fbdev = NULL;
 604
 605         if (!dev)
 606                 return -ENODEV;
 607
 608         fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
 609
 610 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 611         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 612 #endif
 613         fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 614
 615         /* Clean up all probe data */
 616         unregister_framebuffer(&fbdev->info);
 617
 618         fb_dealloc_cmap(&fbdev->info.cmap);
 619
 620         return 0;
 621 }
 622
 623 #ifdef CONFIG_PM
 624 static u32 sys_clksrc;
 625 static struct au1100fb_regs fbregs;
 626
 627 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 628 {
 629         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 630
 631         if (!fbdev)
 632                 return 0;
 633
 634         /* Save the clock source state */
 635         sys_clksrc = au_readl(SYS_CLKSRC);
 636
 637         /* Blank the LCD */
 638         au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 639
 640         /* Stop LCD clocking */
 641         au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 642
 643         memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 644
 645         return 0;
 646 }
 647
 648 int au1100fb_drv_resume(struct platform_device *dev)
 649 {
 650         struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 651
 652         if (!fbdev)
 653                 return 0;
 654
 655         memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 656
 657         /* Restart LCD clocking */
 658         au_writel(sys_clksrc, SYS_CLKSRC);
 659
 660         /* Unblank the LCD */
 661         au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 662
 663         return 0;
 664 }
 665 #else
 666 #define au1100fb_drv_suspend NULL
 667 #define au1100fb_drv_resume NULL
 668 #endif
 669
 670 static struct platform_driver au1100fb_driver = {
 671         .driver = {
 672                 .name           = "au1100-lcd",
 673                 .owner          = THIS_MODULE,
 674         },
 675         .probe          = au1100fb_drv_probe,
 676         .remove         = au1100fb_drv_remove,
 677         .suspend        = au1100fb_drv_suspend,
 678         .resume         = au1100fb_drv_resume,
 679 };
 680
 681 static int __init au1100fb_load(void)
 682 {
 683         return platform_driver_register(&au1100fb_driver);
 684 }
 685
 686 static void __exit au1100fb_unload(void)
 687 {
 688         platform_driver_unregister(&au1100fb_driver);
 689 }
 690
 691 module_init(au1100fb_load);
 692 module_exit(au1100fb_unload);
 693
 694 MODULE_DESCRIPTION(DRIVER_DESC);
 695 MODULE_LICENSE("GPL");