1 files changed, 642 insertions, 0 deletions

diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
new file mode 100644
index 000000000000..372d4aea9d1c
--- /dev/null
+++ b/drivers/video/fbdev/au1100fb.c
@@ -0,0 +1,642 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *      Au1100 LCD Driver.
+ *
+ * Rewritten for 2.6 by Embedded Alley Solutions
+ *      <source@embeddedalley.com>, based on submissions by
+ *      Karl Lessard <klessard@sunrisetelecom.com>
+ *      <c.pellegrin@exadron.com>
+ *
+ * PM support added by Rodolfo Giometti <giometti@linux.it>
+ * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
+ *
+ * Copyright 2002 MontaVista Software
+ * Author: MontaVista Software, Inc.
+ *              ppopov@mvista.com or source@mvista.com
+ *
+ * Copyright 2002 Alchemy Semiconductor
+ * Author: Alchemy Semiconductor
+ *
+ * Based on:
+ * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
+ *  Created 28 Dec 1997 by Geert Uytterhoeven
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ctype.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/mach-au1x00/au1000.h>
+
+#define DEBUG 0
+
+#include "au1100fb.h"
+
+#define DRIVER_NAME "au1100fb"
+#define DRIVER_DESC "LCD controller driver for AU1100 processors"
+
+#define to_au1100fb_device(_info) \
+          (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
+
+/* Bitfields format supported by the controller. Note that the order of formats
+ * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
+ * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
+ */
+struct fb_bitfield rgb_bitfields[][4] =
+{
+        /*     Red,        Green,        Blue,       Transp   */
+        { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
+        { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
+        { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
+        { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
+        { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
+
+        /* The last is used to describe 12bpp format */
+        { { 8, 4, 0 },  { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
+};
+
+static struct fb_fix_screeninfo au1100fb_fix = {
+        .id             = "AU1100 FB",
+        .xpanstep       = 1,
+        .ypanstep       = 1,
+        .type           = FB_TYPE_PACKED_PIXELS,
+        .accel          = FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo au1100fb_var = {
+        .activate       = FB_ACTIVATE_NOW,
+        .height         = -1,
+        .width          = -1,
+        .vmode          = FB_VMODE_NONINTERLACED,
+};
+
+/* fb_blank
+ * Blank the screen. Depending on the mode, the screen will be
+ * activated with the backlight color, or desactivated
+ */
+static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
+{
+        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+
+        print_dbg("fb_blank %d %p", blank_mode, fbi);
+
+        switch (blank_mode) {
+
+        case VESA_NO_BLANKING:
+                /* Turn on panel */
+                fbdev->regs->lcd_control |= LCD_CONTROL_GO;
+                au_sync();
+                break;
+
+        case VESA_VSYNC_SUSPEND:
+        case VESA_HSYNC_SUSPEND:
+        case VESA_POWERDOWN:
+                /* Turn off panel */
+                fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+                au_sync();
+                break;
+        default:
+                break;
+
+        }
+        return 0;
+}
+
+/*
+ * Set hardware with var settings. This will enable the controller with a specific
+ * mode, normally validated with the fb_check_var method
+         */
+int au1100fb_setmode(struct au1100fb_device *fbdev)
+{
+        struct fb_info *info = &fbdev->info;
+        u32 words;
+        int index;
+
+        if (!fbdev)
+                return -EINVAL;
+
+        /* Update var-dependent FB info */
+        if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
+                if (info->var.bits_per_pixel <= 8) {
+                        /* palettized */
+                        info->var.red.offset    = 0;
+                        info->var.red.length    = info->var.bits_per_pixel;
+                        info->var.red.msb_right = 0;
+
+                        info->var.green.offset  = 0;
+                        info->var.green.length  = info->var.bits_per_pixel;
+                        info->var.green.msb_right = 0;
+
+                        info->var.blue.offset   = 0;
+                        info->var.blue.length   = info->var.bits_per_pixel;
+                        info->var.blue.msb_right = 0;
+
+                        info->var.transp.offset = 0;
+                        info->var.transp.length = 0;
+                        info->var.transp.msb_right = 0;
+
+                        info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+                        info->fix.line_length = info->var.xres_virtual /
+                                                        (8/info->var.bits_per_pixel);
+                } else {
+                        /* non-palettized */
+                        index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
+                        info->var.red = rgb_bitfields[index][0];
+                        info->var.green = rgb_bitfields[index][1];
+                        info->var.blue = rgb_bitfields[index][2];
+                        info->var.transp = rgb_bitfields[index][3];
+
+                        info->fix.visual = FB_VISUAL_TRUECOLOR;
+                        info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
+                }
+        } else {
+                /* mono */
+                info->fix.visual = FB_VISUAL_MONO10;
+                info->fix.line_length = info->var.xres_virtual / 8;
+        }
+
+        info->screen_size = info->fix.line_length * info->var.yres_virtual;
+        info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
+                                >> LCD_CONTROL_SM_BIT) * 90;
+
+        /* Determine BPP mode and format */
+        fbdev->regs->lcd_control = fbdev->panel->control_base;
+        fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
+        fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
+        fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
+        fbdev->regs->lcd_intenable = 0;
+        fbdev->regs->lcd_intstatus = 0;
+        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
+
+        if (panel_is_dual(fbdev->panel)) {
+                /* Second panel display seconf half of screen if possible,
+                 * otherwise display the same as the first panel */
+                if (info->var.yres_virtual >= (info->var.yres << 1)) {
+                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
+                                                          (info->fix.line_length *
+                                                          (info->var.yres_virtual >> 1)));
+                } else {
+                        fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
+                }
+        }
+
+        words = info->fix.line_length / sizeof(u32);
+        if (!info->var.rotate || (info->var.rotate == 180)) {
+                words *= info->var.yres_virtual;
+                if (info->var.rotate /* 180 */) {
+                        words -= (words % 8); /* should be divisable by 8 */
+                }
+        }
+        fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
+
+        fbdev->regs->lcd_pwmdiv = 0;
+        fbdev->regs->lcd_pwmhi = 0;
+
+        /* Resume controller */
+        fbdev->regs->lcd_control |= LCD_CONTROL_GO;
+        mdelay(10);
+        au1100fb_fb_blank(VESA_NO_BLANKING, info);
+
+        return 0;
+}
+
+/* fb_setcolreg
+ * Set color in LCD palette.
+ */
+int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
+{
+        struct au1100fb_device *fbdev;
+        u32 *palette;
+        u32 value;
+
+        fbdev = to_au1100fb_device(fbi);
+        palette = fbdev->regs->lcd_pallettebase;
+
+        if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
+                return -EINVAL;
+
+        if (fbi->var.grayscale) {
+                /* Convert color to grayscale */
+                red = green = blue =
+                        (19595 * red + 38470 * green + 7471 * blue) >> 16;
+        }
+
+        if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
+                /* Place color in the pseudopalette */
+                if (regno > 16)
+                        return -EINVAL;
+
+                palette = (u32*)fbi->pseudo_palette;
+
+                red   >>= (16 - fbi->var.red.length);
+                green >>= (16 - fbi->var.green.length);
+                blue  >>= (16 - fbi->var.blue.length);
+
+                value = (red   << fbi->var.red.offset)  |
+                        (green << fbi->var.green.offset)|
+                        (blue  << fbi->var.blue.offset);
+                value &= 0xFFFF;
+
+        } else if (panel_is_active(fbdev->panel)) {
+                /* COLOR TFT PALLETTIZED (use RGB 565) */
+                value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
+                value &= 0xFFFF;
+
+        } else if (panel_is_color(fbdev->panel)) {
+                /* COLOR STN MODE */
+                value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
+                        ((green >> 8) & 0x00F0) |
+                        (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
+                value &= 0xFFF;
+        } else {
+                /* MONOCHROME MODE */
+                value = (green >> 12) & 0x000F;
+                value &= 0xF;
+        }
+
+        palette[regno] = value;
+
+        return 0;
+}
+
+/* fb_pan_display
+ * Pan display in x and/or y as specified
+ */
+int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+        struct au1100fb_device *fbdev;
+        int dy;
+
+        fbdev = to_au1100fb_device(fbi);
+
+        print_dbg("fb_pan_display %p %p", var, fbi);
+
+        if (!var || !fbdev) {
+                return -EINVAL;
+        }
+
+        if (var->xoffset - fbi->var.xoffset) {
+                /* No support for X panning for now! */
+                return -EINVAL;
+        }
+
+        print_dbg("fb_pan_display 2 %p %p", var, fbi);
+        dy = var->yoffset - fbi->var.yoffset;
+        if (dy) {
+
+                u32 dmaaddr;
+
+                print_dbg("Panning screen of %d lines", dy);
+
+                dmaaddr = fbdev->regs->lcd_dmaaddr0;
+                dmaaddr += (fbi->fix.line_length * dy);
+
+                /* TODO: Wait for current frame to finished */
+                fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
+
+                if (panel_is_dual(fbdev->panel)) {
+                        dmaaddr = fbdev->regs->lcd_dmaaddr1;
+                        dmaaddr += (fbi->fix.line_length * dy);
+                        fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
+        }
+        }
+        print_dbg("fb_pan_display 3 %p %p", var, fbi);
+
+        return 0;
+}
+
+/* fb_rotate
+ * Rotate the display of this angle. This doesn't seems to be used by the core,
+ * but as our hardware supports it, so why not implementing it...
+ */
+void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
+{
+        struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
+
+        print_dbg("fb_rotate %p %d", fbi, angle);
+
+        if (fbdev && (angle > 0) && !(angle % 90)) {
+
+                fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+
+                fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
+                fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
+
+                fbdev->regs->lcd_control |= LCD_CONTROL_GO;
+        }
+}
+
+/* fb_mmap
+ * Map video memory in user space. We don't use the generic fb_mmap method mainly
+ * to allow the use of the TLB streaming flag (CCA=6)
+ */
+int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
+{
+        struct au1100fb_device *fbdev;
+
+        fbdev = to_au1100fb_device(fbi);
+
+        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+        pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
+
+        return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
+}
+
+static struct fb_ops au1100fb_ops =
+{
+        .owner                  = THIS_MODULE,
+        .fb_setcolreg           = au1100fb_fb_setcolreg,
+        .fb_blank               = au1100fb_fb_blank,
+        .fb_pan_display         = au1100fb_fb_pan_display,
+        .fb_fillrect            = cfb_fillrect,
+        .fb_copyarea            = cfb_copyarea,
+        .fb_imageblit           = cfb_imageblit,
+        .fb_rotate              = au1100fb_fb_rotate,
+        .fb_mmap                = au1100fb_fb_mmap,
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+static int au1100fb_setup(struct au1100fb_device *fbdev)
+{
+        char *this_opt, *options;
+        int num_panels = ARRAY_SIZE(known_lcd_panels);
+
+        if (num_panels <= 0) {
+                print_err("No LCD panels supported by driver!");
+                return -ENODEV;
+        }
+
+        if (fb_get_options(DRIVER_NAME, &options))
+                return -ENODEV;
+        if (!options)
+                return -ENODEV;
+
+        while ((this_opt = strsep(&options, ",")) != NULL) {
+                /* Panel option */
+                if (!strncmp(this_opt, "panel:", 6)) {
+                        int i;
+                        this_opt += 6;
+                        for (i = 0; i < num_panels; i++) {
+                                if (!strncmp(this_opt, known_lcd_panels[i].name,
+                                             strlen(this_opt))) {
+                                        fbdev->panel = &known_lcd_panels[i];
+                                        fbdev->panel_idx = i;
+                                        break;
+                                }
+                        }
+                        if (i >= num_panels) {
+                                print_warn("Panel '%s' not supported!", this_opt);
+                                return -ENODEV;
+                        }
+                }
+                /* Unsupported option */
+                else
+                        print_warn("Unsupported option \"%s\"", this_opt);
+        }
+
+        print_info("Panel=%s", fbdev->panel->name);
+
+        return 0;
+}
+
+static int au1100fb_drv_probe(struct platform_device *dev)
+{
+        struct au1100fb_device *fbdev = NULL;
+        struct resource *regs_res;
+        unsigned long page;
+        u32 sys_clksrc;
+
+        /* Allocate new device private */
+        fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
+                             GFP_KERNEL);
+        if (!fbdev) {
+                print_err("fail to allocate device private record");
+                return -ENOMEM;
+        }
+
+        if (au1100fb_setup(fbdev))
+                goto failed;
+
+        platform_set_drvdata(dev, (void *)fbdev);
+
+        /* Allocate region for our registers and map them */
+        regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        if (!regs_res) {
+                print_err("fail to retrieve registers resource");
+                return -EFAULT;
+        }
+
+        au1100fb_fix.mmio_start = regs_res->start;
+        au1100fb_fix.mmio_len = resource_size(regs_res);
+
+        if (!devm_request_mem_region(&dev->dev,
+                                     au1100fb_fix.mmio_start,
+                                     au1100fb_fix.mmio_len,
+                                     DRIVER_NAME)) {
+                print_err("fail to lock memory region at 0x%08lx",
+                                au1100fb_fix.mmio_start);
+                return -EBUSY;
+        }
+
+        fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
+
+        print_dbg("Register memory map at %p", fbdev->regs);
+        print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
+
+        /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
+        fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
+                        (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
+
+        fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
+                                            PAGE_ALIGN(fbdev->fb_len),
+                                            &fbdev->fb_phys, GFP_KERNEL);
+        if (!fbdev->fb_mem) {
+                print_err("fail to allocate frambuffer (size: %dK))",
+                          fbdev->fb_len / 1024);
+                return -ENOMEM;
+        }
+
+        au1100fb_fix.smem_start = fbdev->fb_phys;
+        au1100fb_fix.smem_len = fbdev->fb_len;
+
+        /*
+         * Set page reserved so that mmap will work. This is necessary
+         * since we'll be remapping normal memory.
+         */
+        for (page = (unsigned long)fbdev->fb_mem;
+             page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
+             page += PAGE_SIZE) {
+#ifdef CONFIG_DMA_NONCOHERENT
+                SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
+#else
+                SetPageReserved(virt_to_page(page));
+#endif
+        }
+
+        print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
+        print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
+
+        /* Setup LCD clock to AUX (48 MHz) */
+        sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
+        au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
+
+        /* load the panel info into the var struct */
+        au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
+        au1100fb_var.xres = fbdev->panel->xres;
+        au1100fb_var.xres_virtual = au1100fb_var.xres;
+        au1100fb_var.yres = fbdev->panel->yres;
+        au1100fb_var.yres_virtual = au1100fb_var.yres;
+
+        fbdev->info.screen_base = fbdev->fb_mem;
+        fbdev->info.fbops = &au1100fb_ops;
+        fbdev->info.fix = au1100fb_fix;
+
+        fbdev->info.pseudo_palette =
+                devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
+        if (!fbdev->info.pseudo_palette)
+                return -ENOMEM;
+
+        if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
+                print_err("Fail to allocate colormap (%d entries)",
+                           AU1100_LCD_NBR_PALETTE_ENTRIES);
+                return -EFAULT;
+        }
+
+        fbdev->info.var = au1100fb_var;
+
+        /* Set h/w registers */
+        au1100fb_setmode(fbdev);
+
+        /* Register new framebuffer */
+        if (register_framebuffer(&fbdev->info) < 0) {
+                print_err("cannot register new framebuffer");
+                goto failed;
+        }
+
+        return 0;
+
+failed:
+        if (fbdev->fb_mem) {
+                dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
+                                     fbdev->fb_phys);
+        }
+        if (fbdev->info.cmap.len != 0) {
+                fb_dealloc_cmap(&fbdev->info.cmap);
+        }
+
+        return -ENODEV;
+}
+
+int au1100fb_drv_remove(struct platform_device *dev)
+{
+        struct au1100fb_device *fbdev = NULL;
+
+        if (!dev)
+                return -ENODEV;
+
+        fbdev = platform_get_drvdata(dev);
+
+#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
+        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
+#endif
+        fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
+
+        /* Clean up all probe data */
+        unregister_framebuffer(&fbdev->info);
+
+        fb_dealloc_cmap(&fbdev->info.cmap);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static u32 sys_clksrc;
+static struct au1100fb_regs fbregs;
+
+int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
+
+        if (!fbdev)
+                return 0;
+
+        /* Save the clock source state */
+        sys_clksrc = au_readl(SYS_CLKSRC);
+
+        /* Blank the LCD */
+        au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
+
+        /* Stop LCD clocking */
+        au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
+
+        memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
+
+        return 0;
+}
+
+int au1100fb_drv_resume(struct platform_device *dev)
+{
+        struct au1100fb_device *fbdev = platform_get_drvdata(dev);
+
+        if (!fbdev)
+                return 0;
+
+        memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
+
+        /* Restart LCD clocking */
+        au_writel(sys_clksrc, SYS_CLKSRC);
+
+        /* Unblank the LCD */
+        au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
+
+        return 0;
+}
+#else
+#define au1100fb_drv_suspend NULL
+#define au1100fb_drv_resume NULL
+#endif
+
+static struct platform_driver au1100fb_driver = {
+        .driver = {
+                .name           = "au1100-lcd",
+                .owner          = THIS_MODULE,
+        },
+        .probe          = au1100fb_drv_probe,
+        .remove         = au1100fb_drv_remove,
+        .suspend        = au1100fb_drv_suspend,
+        .resume         = au1100fb_drv_resume,
+};
+module_platform_driver(au1100fb_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");