LXR linux/drivers/video/fbdev/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 */
  73struct 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
  86static 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
  94static 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 */
 105static 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         */
 137int 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 */
 234int 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 */
 293int 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 */
 340void 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 */
 361int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
 362{
 363        struct au1100fb_device *fbdev;
 364
 365        fbdev = to_au1100fb_device(fbi);
 366
 367        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 368        pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
 369
 370        return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
 371}
 372
 373static struct fb_ops au1100fb_ops =
 374{
 375        .owner                  = THIS_MODULE,
 376        .fb_setcolreg           = au1100fb_fb_setcolreg,
 377        .fb_blank               = au1100fb_fb_blank,
 378        .fb_pan_display         = au1100fb_fb_pan_display,
 379        .fb_fillrect            = cfb_fillrect,
 380        .fb_copyarea            = cfb_copyarea,
 381        .fb_imageblit           = cfb_imageblit,
 382        .fb_rotate              = au1100fb_fb_rotate,
 383        .fb_mmap                = au1100fb_fb_mmap,
 384};
 385
 386
 387/*-------------------------------------------------------------------------*/
 388
 389static int au1100fb_setup(struct au1100fb_device *fbdev)
 390{
 391        char *this_opt, *options;
 392        int num_panels = ARRAY_SIZE(known_lcd_panels);
 393
 394        if (num_panels <= 0) {
 395                print_err("No LCD panels supported by driver!");
 396                return -ENODEV;
 397        }
 398
 399        if (fb_get_options(DRIVER_NAME, &options))
 400                return -ENODEV;
 401        if (!options)
 402                return -ENODEV;
 403
 404        while ((this_opt = strsep(&options, ",")) != NULL) {
 405                /* Panel option */
 406                if (!strncmp(this_opt, "panel:", 6)) {
 407                        int i;
 408                        this_opt += 6;
 409                        for (i = 0; i < num_panels; i++) {
 410                                if (!strncmp(this_opt, known_lcd_panels[i].name,
 411                                             strlen(this_opt))) {
 412                                        fbdev->panel = &known_lcd_panels[i];
 413                                        fbdev->panel_idx = i;
 414                                        break;
 415                                }
 416                        }
 417                        if (i >= num_panels) {
 418                                print_warn("Panel '%s' not supported!", this_opt);
 419                                return -ENODEV;
 420                        }
 421                }
 422                /* Unsupported option */
 423                else
 424                        print_warn("Unsupported option \"%s\"", this_opt);
 425        }
 426
 427        print_info("Panel=%s", fbdev->panel->name);
 428
 429        return 0;
 430}
 431
 432static int au1100fb_drv_probe(struct platform_device *dev)
 433{
 434        struct au1100fb_device *fbdev = NULL;
 435        struct resource *regs_res;
 436        unsigned long page;
 437        u32 sys_clksrc;
 438
 439        /* Allocate new device private */
 440        fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
 441                             GFP_KERNEL);
 442        if (!fbdev) {
 443                print_err("fail to allocate device private record");
 444                return -ENOMEM;
 445        }
 446
 447        if (au1100fb_setup(fbdev))
 448                goto failed;
 449
 450        platform_set_drvdata(dev, (void *)fbdev);
 451
 452        /* Allocate region for our registers and map them */
 453        regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 454        if (!regs_res) {
 455                print_err("fail to retrieve registers resource");
 456                return -EFAULT;
 457        }
 458
 459        au1100fb_fix.mmio_start = regs_res->start;
 460        au1100fb_fix.mmio_len = resource_size(regs_res);
 461
 462        if (!devm_request_mem_region(&dev->dev,
 463                                     au1100fb_fix.mmio_start,
 464                                     au1100fb_fix.mmio_len,
 465                                     DRIVER_NAME)) {
 466                print_err("fail to lock memory region at 0x%08lx",
 467                                au1100fb_fix.mmio_start);
 468                return -EBUSY;
 469        }
 470
 471        fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
 472
 473        print_dbg("Register memory map at %p", fbdev->regs);
 474        print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 475
 476        /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 477        fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 478                        (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
 479
 480        fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
 481                                            PAGE_ALIGN(fbdev->fb_len),
 482                                            &fbdev->fb_phys, GFP_KERNEL);
 483        if (!fbdev->fb_mem) {
 484                print_err("fail to allocate frambuffer (size: %dK))",
 485                          fbdev->fb_len / 1024);
 486                return -ENOMEM;
 487        }
 488
 489        au1100fb_fix.smem_start = fbdev->fb_phys;
 490        au1100fb_fix.smem_len = fbdev->fb_len;
 491
 492        /*
 493         * Set page reserved so that mmap will work. This is necessary
 494         * since we'll be remapping normal memory.
 495         */
 496        for (page = (unsigned long)fbdev->fb_mem;
 497             page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
 498             page += PAGE_SIZE) {
 499#ifdef CONFIG_DMA_NONCOHERENT
 500                SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
 501#else
 502                SetPageReserved(virt_to_page(page));
 503#endif
 504        }
 505
 506        print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 507        print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 508
 509        /* Setup LCD clock to AUX (48 MHz) */
 510        sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
 511        au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
 512
 513        /* load the panel info into the var struct */
 514        au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 515        au1100fb_var.xres = fbdev->panel->xres;
 516        au1100fb_var.xres_virtual = au1100fb_var.xres;
 517        au1100fb_var.yres = fbdev->panel->yres;
 518        au1100fb_var.yres_virtual = au1100fb_var.yres;
 519
 520        fbdev->info.screen_base = fbdev->fb_mem;
 521        fbdev->info.fbops = &au1100fb_ops;
 522        fbdev->info.fix = au1100fb_fix;
 523
 524        fbdev->info.pseudo_palette =
 525                devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
 526        if (!fbdev->info.pseudo_palette)
 527                return -ENOMEM;
 528
 529        if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
 530                print_err("Fail to allocate colormap (%d entries)",
 531                           AU1100_LCD_NBR_PALETTE_ENTRIES);
 532                return -EFAULT;
 533        }
 534
 535        fbdev->info.var = au1100fb_var;
 536
 537        /* Set h/w registers */
 538        au1100fb_setmode(fbdev);
 539
 540        /* Register new framebuffer */
 541        if (register_framebuffer(&fbdev->info) < 0) {
 542                print_err("cannot register new framebuffer");
 543                goto failed;
 544        }
 545
 546        return 0;
 547
 548failed:
 549        if (fbdev->fb_mem) {
 550                dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 551                                     fbdev->fb_phys);
 552        }
 553        if (fbdev->info.cmap.len != 0) {
 554                fb_dealloc_cmap(&fbdev->info.cmap);
 555        }
 556
 557        return -ENODEV;
 558}
 559
 560int au1100fb_drv_remove(struct platform_device *dev)
 561{
 562        struct au1100fb_device *fbdev = NULL;
 563
 564        if (!dev)
 565                return -ENODEV;
 566
 567        fbdev = platform_get_drvdata(dev);
 568
 569#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 570        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 571#endif
 572        fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
 573
 574        /* Clean up all probe data */
 575        unregister_framebuffer(&fbdev->info);
 576
 577        fb_dealloc_cmap(&fbdev->info.cmap);
 578
 579        return 0;
 580}
 581
 582#ifdef CONFIG_PM
 583static u32 sys_clksrc;
 584static struct au1100fb_regs fbregs;
 585
 586int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 587{
 588        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 589
 590        if (!fbdev)
 591                return 0;
 592
 593        /* Save the clock source state */
 594        sys_clksrc = au_readl(SYS_CLKSRC);
 595
 596        /* Blank the LCD */
 597        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 598
 599        /* Stop LCD clocking */
 600        au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
 601
 602        memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 603
 604        return 0;
 605}
 606
 607int au1100fb_drv_resume(struct platform_device *dev)
 608{
 609        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
 610
 611        if (!fbdev)
 612                return 0;
 613
 614        memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 615
 616        /* Restart LCD clocking */
 617        au_writel(sys_clksrc, SYS_CLKSRC);
 618
 619        /* Unblank the LCD */
 620        au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
 621
 622        return 0;
 623}
 624#else
 625#define au1100fb_drv_suspend NULL
 626#define au1100fb_drv_resume NULL
 627#endif
 628
 629static struct platform_driver au1100fb_driver = {
 630        .driver = {
 631                .name           = "au1100-lcd",
 632                .owner          = THIS_MODULE,
 633        },
 634        .probe          = au1100fb_drv_probe,
 635        .remove         = au1100fb_drv_remove,
 636        .suspend        = au1100fb_drv_suspend,
 637        .resume         = au1100fb_drv_resume,
 638};
 639module_platform_driver(au1100fb_driver);
 640
 641MODULE_DESCRIPTION(DRIVER_DESC);
 642MODULE_LICENSE("GPL");
 643