/*
   * 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 __devinitdata = {

  	.id		= "AU1100 FB",
  	.xpanstep 	= 1,
  	.ypanstep 	= 1,
  	.type		= FB_TYPE_PACKED_PIXELS,
  	.accel		= FB_ACCEL_NONE,

  };

  static struct fb_var_screeninfo au1100fb_var __devinitdata = {

  	.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;
  #ifdef CONFIG_MIPS_PB1100

  			if (fbdev->panel_idx == 1) {

  				au_writew(au_readw(PB1100_G_CONTROL)
  					  | (PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
  			PB1100_G_CONTROL);
  			}
  #endif
  		au_sync();
  		break;
  
  	case VESA_VSYNC_SUSPEND:
  	case VESA_HSYNC_SUSPEND:
  	case VESA_POWERDOWN:
  			/* Turn off panel */
  			fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
  #ifdef CONFIG_MIPS_PB1100

  			if (fbdev->panel_idx == 1) {

  				au_writew(au_readw(PB1100_G_CONTROL)
  				  	  & ~(PB1100_G_CONTROL_BL | PB1100_G_CONTROL_VDD),
  			PB1100_G_CONTROL);
  			}
  #endif
  		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;

  	unsigned int len;
  	unsigned long start=0, off;

  	fbdev = to_au1100fb_device(fbi);

  	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
  		return -EINVAL;
  	}

  	start = fbdev->fb_phys & PAGE_MASK;
  	len = PAGE_ALIGN((start & ~PAGE_MASK) + fbdev->fb_len);

  
  	off = vma->vm_pgoff << PAGE_SHIFT;
  
  	if ((vma->vm_end - vma->vm_start + off) > len) {
  		return -EINVAL;
  	}
  
  	off += start;
  	vma->vm_pgoff = off >> PAGE_SHIFT;

  	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

  	pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6

  	vma->vm_flags |= VM_IO;

  	if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,

  				vma->vm_end - vma->vm_start,
  				vma->vm_page_prot)) {
  		return -EAGAIN;
  	}

  	return 0;
  }

  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 __devinit 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 = kzalloc(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 (!request_mem_region(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 = dma_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) {

  #if 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;

  	if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) {

  		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);
  		kfree(fbdev->info.pseudo_palette);
  		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->regs) {
  		release_mem_region(fbdev->regs_phys, fbdev->regs_len);
  	}
  	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);
  	}
  	kfree(fbdev);

  	platform_set_drvdata(dev, NULL);

  
  	return 0;
  }

  int au1100fb_drv_remove(struct platform_device *dev)

  {
  	struct au1100fb_device *fbdev = NULL;
  
  	if (!dev)
  		return -ENODEV;

  	fbdev = (struct au1100fb_device *) 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);
  
  	release_mem_region(fbdev->regs_phys, fbdev->regs_len);

  	dma_free_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem,
  			  fbdev->fb_phys);

  
  	fb_dealloc_cmap(&fbdev->info.cmap);
  	kfree(fbdev->info.pseudo_palette);
  	kfree((void*)fbdev);
  
  	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,
  };

  static int __init au1100fb_load(void)

  {

  	return platform_driver_register(&au1100fb_driver);

  }

  static void __exit au1100fb_unload(void)

  {

  	platform_driver_unregister(&au1100fb_driver);

  }

  module_init(au1100fb_load);
  module_exit(au1100fb_unload);

  
  MODULE_DESCRIPTION(DRIVER_DESC);
  MODULE_LICENSE("GPL");