[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / imxfb.c

/*
 *  linux/drivers/video/imxfb.c
 *
 *  Freescale i.MX Frame Buffer device driver
 *
 *  Copyright (C) 2004 Sascha Hauer, Pengutronix
 *   Based on acornfb.c Copyright (C) Russell King.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 *
 * Please direct your questions and comments on this driver to the following
 * email address:
 *
 *	linux-arm-kernel@lists.arm.linux.org.uk
 */

//#define DEBUG 1

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>

#include <mach/hardware.h>
#include <asm/io.h>
#include <mach/imxfb.h>

/*
 * Complain if VAR is out of range.
 */
#define DEBUG_VAR 1

#include "imxfb.h"

static struct imxfb_rgb def_rgb_16 = {
	.red	= { .offset = 8,  .length = 4, },
	.green	= { .offset = 4,  .length = 4, },
	.blue	= { .offset = 0,  .length = 4, },
	.transp = { .offset = 0,  .length = 0, },
};

static struct imxfb_rgb def_rgb_8 = {
	.red	= { .offset = 0,  .length = 8, },
	.green	= { .offset = 0,  .length = 8, },
	.blue	= { .offset = 0,  .length = 8, },
	.transp = { .offset = 0,  .length = 0, },
};

static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info);

static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
{
	chan &= 0xffff;
	chan >>= 16 - bf->length;
	return chan << bf->offset;
}

#define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
static int
imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
		       u_int trans, struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;
	u_int val, ret = 1;

#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
	if (regno < fbi->palette_size) {
		val = (CNVT_TOHW(red, 4) << 8) |
		      (CNVT_TOHW(green,4) << 4) |
		      CNVT_TOHW(blue,  4);

		LCDC_PALETTE(regno) = val;
		ret = 0;
	}
	return ret;
}

static int
imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
		   u_int trans, struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;
	unsigned int val;
	int ret = 1;

	/*
	 * If inverse mode was selected, invert all the colours
	 * rather than the register number.  The register number
	 * is what you poke into the framebuffer to produce the
	 * colour you requested.
	 */
	if (fbi->cmap_inverse) {
		red   = 0xffff - red;
		green = 0xffff - green;
		blue  = 0xffff - blue;
	}

	/*
	 * If greyscale is true, then we convert the RGB value
	 * to greyscale no mater what visual we are using.
	 */
	if (info->var.grayscale)
		red = green = blue = (19595 * red + 38470 * green +
					7471 * blue) >> 16;

	switch (info->fix.visual) {
	case FB_VISUAL_TRUECOLOR:
		/*
		 * 12 or 16-bit True Colour.  We encode the RGB value
		 * according to the RGB bitfield information.
		 */
		if (regno < 16) {
			u32 *pal = info->pseudo_palette;

			val  = chan_to_field(red, &info->var.red);
			val |= chan_to_field(green, &info->var.green);
			val |= chan_to_field(blue, &info->var.blue);

			pal[regno] = val;
			ret = 0;
		}
		break;

	case FB_VISUAL_STATIC_PSEUDOCOLOR:
	case FB_VISUAL_PSEUDOCOLOR:
		ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
		break;
	}

	return ret;
}

/*
 *  imxfb_check_var():
 *    Round up in the following order: bits_per_pixel, xres,
 *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 *    bitfields, horizontal timing, vertical timing.
 */
static int
imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;
	int rgbidx;

	if (var->xres < MIN_XRES)
		var->xres = MIN_XRES;
	if (var->yres < MIN_YRES)
		var->yres = MIN_YRES;
	if (var->xres > fbi->max_xres)
		var->xres = fbi->max_xres;
	if (var->yres > fbi->max_yres)
		var->yres = fbi->max_yres;
	var->xres_virtual = max(var->xres_virtual, var->xres);
	var->yres_virtual = max(var->yres_virtual, var->yres);

	pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
	switch (var->bits_per_pixel) {
	case 16:
		rgbidx = RGB_16;
		break;
	case 8:
		rgbidx = RGB_8;
		break;
	default:
		rgbidx = RGB_16;
	}

	/*
	 * Copy the RGB parameters for this display
	 * from the machine specific parameters.
	 */
	var->red    = fbi->rgb[rgbidx]->red;
	var->green  = fbi->rgb[rgbidx]->green;
	var->blue   = fbi->rgb[rgbidx]->blue;
	var->transp = fbi->rgb[rgbidx]->transp;

	pr_debug("RGBT length = %d:%d:%d:%d\n",
		var->red.length, var->green.length, var->blue.length,
		var->transp.length);

	pr_debug("RGBT offset = %d:%d:%d:%d\n",
		var->red.offset, var->green.offset, var->blue.offset,
		var->transp.offset);

	return 0;
}

/*
 * imxfb_set_par():
 *	Set the user defined part of the display for the specified console
 */
static int imxfb_set_par(struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;
	struct fb_var_screeninfo *var = &info->var;

	pr_debug("set_par\n");

	if (var->bits_per_pixel == 16)
		info->fix.visual = FB_VISUAL_TRUECOLOR;
	else if (!fbi->cmap_static)
		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
	else {
		/*
		 * Some people have weird ideas about wanting static
		 * pseudocolor maps.  I suspect their user space
		 * applications are broken.
		 */
		info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
	}

	info->fix.line_length = var->xres_virtual *
				  var->bits_per_pixel / 8;
	fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;

	imxfb_activate_var(var, info);

	return 0;
}

static void imxfb_enable_controller(struct imxfb_info *fbi)
{
	pr_debug("Enabling LCD controller\n");

	/* initialize LCDC */
	LCDC_RMCR &= ~RMCR_LCDC_EN;		/* just to be safe... */

	LCDC_SSA	= fbi->screen_dma;
	/* physical screen start address	    */
	LCDC_VPW	= VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);

	LCDC_POS	= 0x00000000;   /* panning offset 0 (0 pixel offset)        */

	/* disable hardware cursor */
	LCDC_CPOS	&= ~(CPOS_CC0 | CPOS_CC1);

	LCDC_RMCR = RMCR_LCDC_EN;

	if(fbi->backlight_power)
		fbi->backlight_power(1);
	if(fbi->lcd_power)
		fbi->lcd_power(1);
}

static void imxfb_disable_controller(struct imxfb_info *fbi)
{
	pr_debug("Disabling LCD controller\n");

	if(fbi->backlight_power)
		fbi->backlight_power(0);
	if(fbi->lcd_power)
		fbi->lcd_power(0);

	LCDC_RMCR = 0;
}

static int imxfb_blank(int blank, struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;

	pr_debug("imxfb_blank: blank=%d\n", blank);

	switch (blank) {
	case FB_BLANK_POWERDOWN:
	case FB_BLANK_VSYNC_SUSPEND:
	case FB_BLANK_HSYNC_SUSPEND:
	case FB_BLANK_NORMAL:
		imxfb_disable_controller(fbi);
		break;

	case FB_BLANK_UNBLANK:
		imxfb_enable_controller(fbi);
		break;
	}
	return 0;
}

static struct fb_ops imxfb_ops = {
	.owner		= THIS_MODULE,
	.fb_check_var	= imxfb_check_var,
	.fb_set_par	= imxfb_set_par,
	.fb_setcolreg	= imxfb_setcolreg,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
	.fb_blank	= imxfb_blank,
};

/*
 * imxfb_activate_var():
 *	Configures LCD Controller based on entries in var parameter.  Settings are
 *	only written to the controller if changes were made.
 */
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;
	pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
		var->xres, var->hsync_len,
		var->left_margin, var->right_margin);
	pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
		var->yres, var->vsync_len,
		var->upper_margin, var->lower_margin);

#if DEBUG_VAR
	if (var->xres < 16        || var->xres > 1024)
		printk(KERN_ERR "%s: invalid xres %d\n",
			info->fix.id, var->xres);
	if (var->hsync_len < 1    || var->hsync_len > 64)
		printk(KERN_ERR "%s: invalid hsync_len %d\n",
			info->fix.id, var->hsync_len);
	if (var->left_margin > 255)
		printk(KERN_ERR "%s: invalid left_margin %d\n",
			info->fix.id, var->left_margin);
	if (var->right_margin > 255)
		printk(KERN_ERR "%s: invalid right_margin %d\n",
			info->fix.id, var->right_margin);
	if (var->yres < 1 || var->yres > 511)
		printk(KERN_ERR "%s: invalid yres %d\n",
			info->fix.id, var->yres);
	if (var->vsync_len > 100)
		printk(KERN_ERR "%s: invalid vsync_len %d\n",
			info->fix.id, var->vsync_len);
	if (var->upper_margin > 63)
		printk(KERN_ERR "%s: invalid upper_margin %d\n",
			info->fix.id, var->upper_margin);
	if (var->lower_margin > 255)
		printk(KERN_ERR "%s: invalid lower_margin %d\n",
			info->fix.id, var->lower_margin);
#endif

	LCDC_HCR	= HCR_H_WIDTH(var->hsync_len) |
	                  HCR_H_WAIT_1(var->left_margin) |
			  HCR_H_WAIT_2(var->right_margin);

	LCDC_VCR	= VCR_V_WIDTH(var->vsync_len) |
	                  VCR_V_WAIT_1(var->upper_margin) |
			  VCR_V_WAIT_2(var->lower_margin);

	LCDC_SIZE	= SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres);
	LCDC_PCR	= fbi->pcr;
	LCDC_PWMR	= fbi->pwmr;
	LCDC_LSCR1	= fbi->lscr1;
	LCDC_DMACR	= fbi->dmacr;

	return 0;
}

static void imxfb_setup_gpio(struct imxfb_info *fbi)
{
	int width;

	LCDC_RMCR	&= ~(RMCR_LCDC_EN | RMCR_SELF_REF);

	if( fbi->pcr & PCR_TFT )
		width = 16;
	else
		width = 1 << ((fbi->pcr >> 28) & 0x3);

	switch(width) {
	case 16:
		imx_gpio_mode(PD30_PF_LD15);
		imx_gpio_mode(PD29_PF_LD14);
		imx_gpio_mode(PD28_PF_LD13);
		imx_gpio_mode(PD27_PF_LD12);
		imx_gpio_mode(PD26_PF_LD11);
		imx_gpio_mode(PD25_PF_LD10);
		imx_gpio_mode(PD24_PF_LD9);
		imx_gpio_mode(PD23_PF_LD8);
	case 8:
		imx_gpio_mode(PD22_PF_LD7);
		imx_gpio_mode(PD21_PF_LD6);
		imx_gpio_mode(PD20_PF_LD5);
		imx_gpio_mode(PD19_PF_LD4);
	case 4:
		imx_gpio_mode(PD18_PF_LD3);
		imx_gpio_mode(PD17_PF_LD2);
	case 2:
		imx_gpio_mode(PD16_PF_LD1);
	case 1:
		imx_gpio_mode(PD15_PF_LD0);
	}

	/* initialize GPIOs */
	imx_gpio_mode(PD6_PF_LSCLK);
	imx_gpio_mode(PD11_PF_CONTRAST);
	imx_gpio_mode(PD14_PF_FLM_VSYNC);
	imx_gpio_mode(PD13_PF_LP_HSYNC);
	imx_gpio_mode(PD12_PF_ACD_OE);

	/* These are only needed for Sharp HR TFT displays */
	if (fbi->pcr & PCR_SHARP) {
		imx_gpio_mode(PD7_PF_REV);
		imx_gpio_mode(PD8_PF_CLS);
		imx_gpio_mode(PD9_PF_PS);
		imx_gpio_mode(PD10_PF_SPL_SPR);
	}
}

#ifdef CONFIG_PM
/*
 * Power management hooks.  Note that we won't be called from IRQ context,
 * unlike the blank functions above, so we may sleep.
 */
static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
{
	struct imxfb_info *fbi = platform_get_drvdata(dev);
	pr_debug("%s\n",__func__);

	imxfb_disable_controller(fbi);
	return 0;
}

static int imxfb_resume(struct platform_device *dev)
{
	struct imxfb_info *fbi = platform_get_drvdata(dev);
	pr_debug("%s\n",__func__);

	imxfb_enable_controller(fbi);
	return 0;
}
#else
#define imxfb_suspend	NULL
#define imxfb_resume	NULL
#endif

static int __init imxfb_init_fbinfo(struct device *dev)
{
	struct imxfb_mach_info *inf = dev->platform_data;
	struct fb_info *info = dev_get_drvdata(dev);
	struct imxfb_info *fbi = info->par;

	pr_debug("%s\n",__func__);

	info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
	if (!info->pseudo_palette)
		return -ENOMEM;

	memset(fbi, 0, sizeof(struct imxfb_info));
	fbi->dev = dev;

	strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));

	info->fix.type	= FB_TYPE_PACKED_PIXELS;
	info->fix.type_aux		= 0;
	info->fix.xpanstep		= 0;
	info->fix.ypanstep		= 0;
	info->fix.ywrapstep		= 0;
	info->fix.accel	= FB_ACCEL_NONE;

	info->var.nonstd		= 0;
	info->var.activate		= FB_ACTIVATE_NOW;
	info->var.height		= -1;
	info->var.width	= -1;
	info->var.accel_flags		= 0;
	info->var.vmode	= FB_VMODE_NONINTERLACED;

	info->fbops			= &imxfb_ops;
	info->flags			= FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST;

	fbi->rgb[RGB_16]		= &def_rgb_16;
	fbi->rgb[RGB_8]			= &def_rgb_8;

	fbi->max_xres			= inf->xres;
	info->var.xres			= inf->xres;
	info->var.xres_virtual		= inf->xres;
	fbi->max_yres			= inf->yres;
	info->var.yres			= inf->yres;
	info->var.yres_virtual		= inf->yres;
	fbi->max_bpp			= inf->bpp;
	info->var.bits_per_pixel	= inf->bpp;
	info->var.nonstd		= inf->nonstd;
	info->var.pixclock		= inf->pixclock;
	info->var.hsync_len		= inf->hsync_len;
	info->var.left_margin		= inf->left_margin;
	info->var.right_margin		= inf->right_margin;
	info->var.vsync_len		= inf->vsync_len;
	info->var.upper_margin		= inf->upper_margin;
	info->var.lower_margin		= inf->lower_margin;
	info->var.sync			= inf->sync;
	info->var.grayscale		= inf->cmap_greyscale;
	fbi->cmap_inverse		= inf->cmap_inverse;
	fbi->cmap_static		= inf->cmap_static;
	fbi->pcr			= inf->pcr;
	fbi->lscr1			= inf->lscr1;
	fbi->dmacr			= inf->dmacr;
	fbi->pwmr			= inf->pwmr;
	fbi->lcd_power			= inf->lcd_power;
	fbi->backlight_power		= inf->backlight_power;
	info->fix.smem_len		= fbi->max_xres * fbi->max_yres *
					  fbi->max_bpp / 8;

	return 0;
}

/*
 *      Allocates the DRAM memory for the frame buffer.  This buffer is
 *	remapped into a non-cached, non-buffered, memory region to
 *      allow pixel writes to occur without flushing the cache.
 *      Once this area is remapped, all virtual memory access to the
 *      video memory should occur at the new region.
 */
static int __init imxfb_map_video_memory(struct fb_info *info)
{
	struct imxfb_info *fbi = info->par;

	fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
	fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
					&fbi->map_dma,GFP_KERNEL);

	if (fbi->map_cpu) {
		info->screen_base = fbi->map_cpu;
		fbi->screen_cpu = fbi->map_cpu;
		fbi->screen_dma = fbi->map_dma;
		info->fix.smem_start = fbi->screen_dma;
	}

	return fbi->map_cpu ? 0 : -ENOMEM;
}

static int __init imxfb_probe(struct platform_device *pdev)
{
	struct imxfb_info *fbi;
	struct fb_info *info;
	struct imxfb_mach_info *inf;
	struct resource *res;
	int ret;

	printk("i.MX Framebuffer driver\n");

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if(!res)
		return -ENODEV;

	inf = pdev->dev.platform_data;
	if(!inf) {
		dev_err(&pdev->dev,"No platform_data available\n");
		return -ENOMEM;
	}

	info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
	if(!info)
		return -ENOMEM;

	fbi = info->par;

	platform_set_drvdata(pdev, info);

	ret = imxfb_init_fbinfo(&pdev->dev);
	if( ret < 0 )
		goto failed_init;

	res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
	if (!res) {
		ret = -EBUSY;
		goto failed_regs;
	}

	if (!inf->fixed_screen_cpu) {
		ret = imxfb_map_video_memory(info);
		if (ret) {
			dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
			ret = -ENOMEM;
			goto failed_map;
		}
	} else {
		/* Fixed framebuffer mapping enables location of the screen in eSRAM */
		fbi->map_cpu = inf->fixed_screen_cpu;
		fbi->map_dma = inf->fixed_screen_dma;
		info->screen_base = fbi->map_cpu;
		fbi->screen_cpu = fbi->map_cpu;
		fbi->screen_dma = fbi->map_dma;
		info->fix.smem_start = fbi->screen_dma;
	}

	/*
	 * This makes sure that our colour bitfield
	 * descriptors are correctly initialised.
	 */
	imxfb_check_var(&info->var, info);

	ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
	if (ret < 0)
		goto failed_cmap;

	imxfb_setup_gpio(fbi);

	imxfb_set_par(info);
	ret = register_framebuffer(info);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to register framebuffer\n");
		goto failed_register;
	}

	imxfb_enable_controller(fbi);

	return 0;

failed_register:
	fb_dealloc_cmap(&info->cmap);
failed_cmap:
	if (!inf->fixed_screen_cpu)
		dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
		           fbi->map_dma);
failed_map:
	kfree(info->pseudo_palette);
failed_regs:
	release_mem_region(res->start, res->end - res->start);
failed_init:
	platform_set_drvdata(pdev, NULL);
	framebuffer_release(info);
	return ret;
}

static int imxfb_remove(struct platform_device *pdev)
{
	struct fb_info *info = platform_get_drvdata(pdev);
	struct imxfb_info *fbi = info->par;
	struct resource *res;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	imxfb_disable_controller(fbi);

	unregister_framebuffer(info);

	fb_dealloc_cmap(&info->cmap);
	kfree(info->pseudo_palette);
	framebuffer_release(info);

	release_mem_region(res->start, res->end - res->start + 1);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

void  imxfb_shutdown(struct platform_device * dev)
{
	struct fb_info *info = platform_get_drvdata(dev);
	struct imxfb_info *fbi = info->par;
	imxfb_disable_controller(fbi);
}

static struct platform_driver imxfb_driver = {
	.probe		= imxfb_probe,
	.suspend	= imxfb_suspend,
	.resume		= imxfb_resume,
	.remove		= imxfb_remove,
	.shutdown	= imxfb_shutdown,
	.driver		= {
		.name	= "imx-fb",
	},
};

int __init imxfb_init(void)
{
	return platform_driver_register(&imxfb_driver);
}

static void __exit imxfb_cleanup(void)
{
	platform_driver_unregister(&imxfb_driver);
}

module_init(imxfb_init);
module_exit(imxfb_cleanup);

MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
Commit	Line	Data
7c2f891c SH	1	/*
	2	* linux/drivers/video/imxfb.c
	3	*
	4	* Freescale i.MX Frame Buffer device driver
	5	*
	6	* Copyright (C) 2004 Sascha Hauer, Pengutronix
	7	* Based on acornfb.c Copyright (C) Russell King.
	8	*
	9	* This file is subject to the terms and conditions of the GNU General Public
	10	* License. See the file COPYING in the main directory of this archive for
	11	* more details.
	12	*
	13	* Please direct your questions and comments on this driver to the following
	14	* email address:
	15	*
	16	* linux-arm-kernel@lists.arm.linux.org.uk
	17	*/
	18
	19	//#define DEBUG 1
	20
7c2f891c SH	21	#include <linux/module.h>
7c2f891c SH	22	#include <linux/kernel.h>
7c2f891c SH	23	#include <linux/errno.h>
	24	#include <linux/string.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/slab.h>
27ac792c	27	#include <linux/mm.h>
7c2f891c SH	28	#include <linux/fb.h>
	29	#include <linux/delay.h>
	30	#include <linux/init.h>
	31	#include <linux/ioport.h>
	32	#include <linux/cpufreq.h>
d052d1be	33	#include <linux/platform_device.h>
7c2f891c SH	34	#include <linux/dma-mapping.h>
7c2f891c SH	35
a09e64fb	36	#include <mach/hardware.h>
7c2f891c	37	#include <asm/io.h>
a09e64fb	38	#include <mach/imxfb.h>
7c2f891c SH	39
	40	/*
	41	* Complain if VAR is out of range.
	42	*/
	43	#define DEBUG_VAR 1
	44
	45	#include "imxfb.h"
	46
	47	static struct imxfb_rgb def_rgb_16 = {
	48	.red = { .offset = 8, .length = 4, },
	49	.green = { .offset = 4, .length = 4, },
	50	.blue = { .offset = 0, .length = 4, },
	51	.transp = { .offset = 0, .length = 0, },
	52	};
	53
	54	static struct imxfb_rgb def_rgb_8 = {
	55	.red = { .offset = 0, .length = 8, },
	56	.green = { .offset = 0, .length = 8, },
	57	.blue = { .offset = 0, .length = 8, },
	58	.transp = { .offset = 0, .length = 0, },
	59	};
	60
	61	static int imxfb_activate_var(struct fb_var_screeninfo var, struct fb_info info);
	62
	63	static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
	64	{
	65	chan &= 0xffff;
	66	chan >>= 16 - bf->length;
	67	return chan << bf->offset;
	68	}
	69
	70	#define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
	71	static int
	72	imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
	73	u_int trans, struct fb_info *info)
	74	{
	75	struct imxfb_info *fbi = info->par;
	76	u_int val, ret = 1;
	77
	78	#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
	79	if (regno < fbi->palette_size) {
	80	val = (CNVT_TOHW(red, 4) << 8) \|
	81	(CNVT_TOHW(green,4) << 4) \|
	82	CNVT_TOHW(blue, 4);
	83
	84	LCDC_PALETTE(regno) = val;
	85	ret = 0;
	86	}
	87	return ret;
	88	}
	89
	90	static int
	91	imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	92	u_int trans, struct fb_info *info)
	93	{
	94	struct imxfb_info *fbi = info->par;
	95	unsigned int val;
	96	int ret = 1;
	97
	98	/*
	99	* If inverse mode was selected, invert all the colours
	100	* rather than the register number. The register number
	101	* is what you poke into the framebuffer to produce the
	102	* colour you requested.
103	*/
104	if (fbi->cmap_inverse) {
105	red = 0xffff - red;
106	green = 0xffff - green;
107	blue = 0xffff - blue;
108	}
109
110	/*
111	* If greyscale is true, then we convert the RGB value
112	* to greyscale no mater what visual we are using.
113	*/
114	if (info->var.grayscale)
115	red = green = blue = (19595 * red + 38470 * green +
116	7471 * blue) >> 16;
117
118	switch (info->fix.visual) {
119	case FB_VISUAL_TRUECOLOR:
120	/*
121	* 12 or 16-bit True Colour. We encode the RGB value
122	* according to the RGB bitfield information.
123	*/
124	if (regno < 16) {
125	u32 *pal = info->pseudo_palette;
126
127	val = chan_to_field(red, &info->var.red);
128	val \|= chan_to_field(green, &info->var.green);
129	val \|= chan_to_field(blue, &info->var.blue);
130
131	pal[regno] = val;
132	ret = 0;
133	}
134	break;
135
136	case FB_VISUAL_STATIC_PSEUDOCOLOR:
137	case FB_VISUAL_PSEUDOCOLOR:
138	ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
139	break;
140	}
141
142	return ret;
143	}
144
145	/*
146	* imxfb_check_var():
147	* Round up in the following order: bits_per_pixel, xres,
148	* yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
149	* bitfields, horizontal timing, vertical timing.
150	*/
151	static int
152	imxfb_check_var(struct fb_var_screeninfo var, struct fb_info info)
153	{
154	struct imxfb_info *fbi = info->par;
155	int rgbidx;
156
157	if (var->xres < MIN_XRES)
158	var->xres = MIN_XRES;
159	if (var->yres < MIN_YRES)
160	var->yres = MIN_YRES;
161	if (var->xres > fbi->max_xres)
162	var->xres = fbi->max_xres;
163	if (var->yres > fbi->max_yres)
164	var->yres = fbi->max_yres;
165	var->xres_virtual = max(var->xres_virtual, var->xres);
166	var->yres_virtual = max(var->yres_virtual, var->yres);
167
168	pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
169	switch (var->bits_per_pixel) {
170	case 16:
171	rgbidx = RGB_16;
172	break;
173	case 8:
174	rgbidx = RGB_8;
175	break;
176	default:
177	rgbidx = RGB_16;
178	}
179
180	/*
181	* Copy the RGB parameters for this display
182	* from the machine specific parameters.
183	*/
184	var->red = fbi->rgb[rgbidx]->red;
185	var->green = fbi->rgb[rgbidx]->green;
186	var->blue = fbi->rgb[rgbidx]->blue;
187	var->transp = fbi->rgb[rgbidx]->transp;
188
189	pr_debug("RGBT length = %d:%d:%d:%d\n",
190	var->red.length, var->green.length, var->blue.length,
191	var->transp.length);
192
193	pr_debug("RGBT offset = %d:%d:%d:%d\n",
194	var->red.offset, var->green.offset, var->blue.offset,
195	var->transp.offset);
196
197	return 0;
198	}
199
200	/*
201	* imxfb_set_par():
202	* Set the user defined part of the display for the specified console
203	*/
204	static int imxfb_set_par(struct fb_info *info)
205	{
206	struct imxfb_info *fbi = info->par;
207	struct fb_var_screeninfo *var = &info->var;
208
209	pr_debug("set_par\n");
210
211	if (var->bits_per_pixel == 16)
212	info->fix.visual = FB_VISUAL_TRUECOLOR;
213	else if (!fbi->cmap_static)
214	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
215	else {
216	/*
217	* Some people have weird ideas about wanting static
218	* pseudocolor maps. I suspect their user space
219	* applications are broken.
220	*/
221	info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
222	}
223
224	info->fix.line_length = var->xres_virtual *
225	var->bits_per_pixel / 8;
226	fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
227
228	imxfb_activate_var(var, info);
229
230	return 0;
231	}
232
233	static void imxfb_enable_controller(struct imxfb_info *fbi)
234	{
235	pr_debug("Enabling LCD controller\n");
236
237	/* initialize LCDC */
238	LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */
239
240	LCDC_SSA = fbi->screen_dma;
241	/* physical screen start address */
242	LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);
243
244	LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */
245
246	/* disable hardware cursor */
247	LCDC_CPOS &= ~(CPOS_CC0 \| CPOS_CC1);
248
7c2f891c SH	249	LCDC_RMCR = RMCR_LCDC_EN;
	250
	251	if(fbi->backlight_power)
	252	fbi->backlight_power(1);
	253	if(fbi->lcd_power)
	254	fbi->lcd_power(1);
	255	}
	256
	257	static void imxfb_disable_controller(struct imxfb_info *fbi)
	258	{
	259	pr_debug("Disabling LCD controller\n");
	260
	261	if(fbi->backlight_power)
	262	fbi->backlight_power(0);
	263	if(fbi->lcd_power)
	264	fbi->lcd_power(0);
	265
	266	LCDC_RMCR = 0;
	267	}
	268
	269	static int imxfb_blank(int blank, struct fb_info *info)
	270	{
	271	struct imxfb_info *fbi = info->par;
	272
	273	pr_debug("imxfb_blank: blank=%d\n", blank);
	274
	275	switch (blank) {
	276	case FB_BLANK_POWERDOWN:
	277	case FB_BLANK_VSYNC_SUSPEND:
	278	case FB_BLANK_HSYNC_SUSPEND:
	279	case FB_BLANK_NORMAL:
	280	imxfb_disable_controller(fbi);
	281	break;
	282
	283	case FB_BLANK_UNBLANK:
	284	imxfb_enable_controller(fbi);
	285	break;
	286	}
	287	return 0;
	288	}
	289
	290	static struct fb_ops imxfb_ops = {
	291	.owner = THIS_MODULE,
	292	.fb_check_var = imxfb_check_var,
	293	.fb_set_par = imxfb_set_par,
	294	.fb_setcolreg = imxfb_setcolreg,
	295	.fb_fillrect = cfb_fillrect,
	296	.fb_copyarea = cfb_copyarea,
	297	.fb_imageblit = cfb_imageblit,
	298	.fb_blank = imxfb_blank,
7c2f891c SH	299	};
	300
	301	/*
	302	* imxfb_activate_var():
	303	* Configures LCD Controller based on entries in var parameter. Settings are
	304	* only written to the controller if changes were made.
	305	*/
	306	static int imxfb_activate_var(struct fb_var_screeninfo var, struct fb_info info)
	307	{
	308	struct imxfb_info *fbi = info->par;
	309	pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
	310	var->xres, var->hsync_len,
	311	var->left_margin, var->right_margin);
	312	pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
	313	var->yres, var->vsync_len,
	314	var->upper_margin, var->lower_margin);
	315
	316	#if DEBUG_VAR
	317	if (var->xres < 16 \|\| var->xres > 1024)
	318	printk(KERN_ERR "%s: invalid xres %d\n",
	319	info->fix.id, var->xres);
	320	if (var->hsync_len < 1 \|\| var->hsync_len > 64)
	321	printk(KERN_ERR "%s: invalid hsync_len %d\n",
	322	info->fix.id, var->hsync_len);
	323	if (var->left_margin > 255)
	324	printk(KERN_ERR "%s: invalid left_margin %d\n",
	325	info->fix.id, var->left_margin);
	326	if (var->right_margin > 255)
	327	printk(KERN_ERR "%s: invalid right_margin %d\n",
	328	info->fix.id, var->right_margin);
	329	if (var->yres < 1 \|\| var->yres > 511)
	330	printk(KERN_ERR "%s: invalid yres %d\n",
	331	info->fix.id, var->yres);
	332	if (var->vsync_len > 100)
	333	printk(KERN_ERR "%s: invalid vsync_len %d\n",
	334	info->fix.id, var->vsync_len);
	335	if (var->upper_margin > 63)
	336	printk(KERN_ERR "%s: invalid upper_margin %d\n",
	337	info->fix.id, var->upper_margin);
	338	if (var->lower_margin > 255)
	339	printk(KERN_ERR "%s: invalid lower_margin %d\n",
	340	info->fix.id, var->lower_margin);
	341	#endif
	342
	343	LCDC_HCR = HCR_H_WIDTH(var->hsync_len) \|
	344	HCR_H_WAIT_1(var->left_margin) \|
	345	HCR_H_WAIT_2(var->right_margin);
	346
	347	LCDC_VCR = VCR_V_WIDTH(var->vsync_len) \|
	348	VCR_V_WAIT_1(var->upper_margin) \|
	349	VCR_V_WAIT_2(var->lower_margin);
	350
	351	LCDC_SIZE = SIZE_XMAX(var->xres) \| SIZE_YMAX(var->yres);
	352	LCDC_PCR = fbi->pcr;
	353	LCDC_PWMR = fbi->pwmr;
	354	LCDC_LSCR1 = fbi->lscr1;
772a9e63	355	LCDC_DMACR = fbi->dmacr;
7c2f891c SH	356
	357	return 0;
	358	}
	359
	360	static void imxfb_setup_gpio(struct imxfb_info *fbi)
	361	{
	362	int width;
	363
	364	LCDC_RMCR &= ~(RMCR_LCDC_EN \| RMCR_SELF_REF);
	365
	366	if( fbi->pcr & PCR_TFT )
	367	width = 16;
	368	else
	369	width = 1 << ((fbi->pcr >> 28) & 0x3);
	370
	371	switch(width) {
	372	case 16:
	373	imx_gpio_mode(PD30_PF_LD15);
	374	imx_gpio_mode(PD29_PF_LD14);
	375	imx_gpio_mode(PD28_PF_LD13);
	376	imx_gpio_mode(PD27_PF_LD12);
	377	imx_gpio_mode(PD26_PF_LD11);
	378	imx_gpio_mode(PD25_PF_LD10);
	379	imx_gpio_mode(PD24_PF_LD9);
	380	imx_gpio_mode(PD23_PF_LD8);
	381	case 8:
	382	imx_gpio_mode(PD22_PF_LD7);
	383	imx_gpio_mode(PD21_PF_LD6);
	384	imx_gpio_mode(PD20_PF_LD5);
	385	imx_gpio_mode(PD19_PF_LD4);
	386	case 4:
	387	imx_gpio_mode(PD18_PF_LD3);
	388	imx_gpio_mode(PD17_PF_LD2);
	389	case 2:
	390	imx_gpio_mode(PD16_PF_LD1);
	391	case 1:
	392	imx_gpio_mode(PD15_PF_LD0);
	393	}
	394
	395	/* initialize GPIOs */
	396	imx_gpio_mode(PD6_PF_LSCLK);
7c2f891c SH	397	imx_gpio_mode(PD11_PF_CONTRAST);
	398	imx_gpio_mode(PD14_PF_FLM_VSYNC);
	399	imx_gpio_mode(PD13_PF_LP_HSYNC);
7c2f891c	400	imx_gpio_mode(PD12_PF_ACD_OE);
7c2f891c	401
90e16ddd SH	402	/* These are only needed for Sharp HR TFT displays */
	403	if (fbi->pcr & PCR_SHARP) {
	404	imx_gpio_mode(PD7_PF_REV);
	405	imx_gpio_mode(PD8_PF_CLS);
	406	imx_gpio_mode(PD9_PF_PS);
	407	imx_gpio_mode(PD10_PF_SPL_SPR);
	408	}
7c2f891c SH	409	}
	410
	411	#ifdef CONFIG_PM
	412	/*
	413	* Power management hooks. Note that we won't be called from IRQ context,
	414	* unlike the blank functions above, so we may sleep.
	415	*/
3ae5eaec	416	static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
7c2f891c	417	{
3ae5eaec	418	struct imxfb_info *fbi = platform_get_drvdata(dev);
5ae12170	419	pr_debug("%s\n",__func__);
7c2f891c	420
9480e307	421	imxfb_disable_controller(fbi);
7c2f891c SH	422	return 0;
	423	}
	424
3ae5eaec	425	static int imxfb_resume(struct platform_device *dev)
7c2f891c	426	{
3ae5eaec	427	struct imxfb_info *fbi = platform_get_drvdata(dev);
5ae12170	428	pr_debug("%s\n",__func__);
7c2f891c	429
9480e307	430	imxfb_enable_controller(fbi);
7c2f891c SH	431	return 0;
	432	}
	433	#else
	434	#define imxfb_suspend NULL
	435	#define imxfb_resume NULL
	436	#endif
	437
	438	static int __init imxfb_init_fbinfo(struct device *dev)
	439	{
	440	struct imxfb_mach_info *inf = dev->platform_data;
	441	struct fb_info *info = dev_get_drvdata(dev);
	442	struct imxfb_info *fbi = info->par;
	443
5ae12170	444	pr_debug("%s\n",__func__);
7c2f891c SH	445
	446	info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
	447	if (!info->pseudo_palette)
	448	return -ENOMEM;
	449
	450	memset(fbi, 0, sizeof(struct imxfb_info));
	451	fbi->dev = dev;
	452
	453	strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
	454
	455	info->fix.type = FB_TYPE_PACKED_PIXELS;
	456	info->fix.type_aux = 0;
	457	info->fix.xpanstep = 0;
	458	info->fix.ypanstep = 0;
	459	info->fix.ywrapstep = 0;
	460	info->fix.accel = FB_ACCEL_NONE;
	461
	462	info->var.nonstd = 0;
	463	info->var.activate = FB_ACTIVATE_NOW;
	464	info->var.height = -1;
	465	info->var.width = -1;
	466	info->var.accel_flags = 0;
	467	info->var.vmode = FB_VMODE_NONINTERLACED;
	468
	469	info->fbops = &imxfb_ops;
9da505d1	470	info->flags = FBINFO_FLAG_DEFAULT \| FBINFO_READS_FAST;
7c2f891c SH	471
	472	fbi->rgb[RGB_16] = &def_rgb_16;
	473	fbi->rgb[RGB_8] = &def_rgb_8;
	474
	475	fbi->max_xres = inf->xres;
	476	info->var.xres = inf->xres;
	477	info->var.xres_virtual = inf->xres;
	478	fbi->max_yres = inf->yres;
	479	info->var.yres = inf->yres;
	480	info->var.yres_virtual = inf->yres;
	481	fbi->max_bpp = inf->bpp;
	482	info->var.bits_per_pixel = inf->bpp;
9da505d1	483	info->var.nonstd = inf->nonstd;
7c2f891c SH	484	info->var.pixclock = inf->pixclock;
	485	info->var.hsync_len = inf->hsync_len;
	486	info->var.left_margin = inf->left_margin;
	487	info->var.right_margin = inf->right_margin;
	488	info->var.vsync_len = inf->vsync_len;
	489	info->var.upper_margin = inf->upper_margin;
	490	info->var.lower_margin = inf->lower_margin;
	491	info->var.sync = inf->sync;
	492	info->var.grayscale = inf->cmap_greyscale;
	493	fbi->cmap_inverse = inf->cmap_inverse;
90e16ddd	494	fbi->cmap_static = inf->cmap_static;
7c2f891c SH	495	fbi->pcr = inf->pcr;
7c2f891c SH	496	fbi->lscr1 = inf->lscr1;
772a9e63	497	fbi->dmacr = inf->dmacr;
7c2f891c SH	498	fbi->pwmr = inf->pwmr;
	499	fbi->lcd_power = inf->lcd_power;
	500	fbi->backlight_power = inf->backlight_power;
	501	info->fix.smem_len = fbi->max_xres * fbi->max_yres *
	502	fbi->max_bpp / 8;
	503
	504	return 0;
	505	}
	506
	507	/*
	508	* Allocates the DRAM memory for the frame buffer. This buffer is
	509	* remapped into a non-cached, non-buffered, memory region to
	510	* allow pixel writes to occur without flushing the cache.
	511	* Once this area is remapped, all virtual memory access to the
	512	* video memory should occur at the new region.
	513	*/
	514	static int __init imxfb_map_video_memory(struct fb_info *info)
	515	{
	516	struct imxfb_info *fbi = info->par;
	517
	518	fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
	519	fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
	520	&fbi->map_dma,GFP_KERNEL);
	521
	522	if (fbi->map_cpu) {
	523	info->screen_base = fbi->map_cpu;
	524	fbi->screen_cpu = fbi->map_cpu;
	525	fbi->screen_dma = fbi->map_dma;
	526	info->fix.smem_start = fbi->screen_dma;
	527	}
	528
	529	return fbi->map_cpu ? 0 : -ENOMEM;
	530	}
	531
3ae5eaec	532	static int __init imxfb_probe(struct platform_device *pdev)
7c2f891c	533	{
7c2f891c SH	534	struct imxfb_info *fbi;
	535	struct fb_info *info;
	536	struct imxfb_mach_info *inf;
	537	struct resource *res;
	538	int ret;
	539
	540	printk("i.MX Framebuffer driver\n");
	541
	542	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	543	if(!res)
	544	return -ENODEV;
	545
3ae5eaec	546	inf = pdev->dev.platform_data;
7c2f891c	547	if(!inf) {
f99c8929	548	dev_err(&pdev->dev,"No platform_data available\n");
7c2f891c SH	549	return -ENOMEM;
	550	}
	551
3ae5eaec	552	info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
7c2f891c SH	553	if(!info)
	554	return -ENOMEM;
	555
	556	fbi = info->par;
	557
3ae5eaec	558	platform_set_drvdata(pdev, info);
7c2f891c	559
3ae5eaec	560	ret = imxfb_init_fbinfo(&pdev->dev);
7c2f891c SH	561	if( ret < 0 )
	562	goto failed_init;
	563
	564	res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
	565	if (!res) {
	566	ret = -EBUSY;
	567	goto failed_regs;
	568	}
	569
	570	if (!inf->fixed_screen_cpu) {
	571	ret = imxfb_map_video_memory(info);
	572	if (ret) {
f99c8929	573	dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
7c2f891c SH	574	ret = -ENOMEM;
	575	goto failed_map;
	576	}
	577	} else {
	578	/* Fixed framebuffer mapping enables location of the screen in eSRAM */
	579	fbi->map_cpu = inf->fixed_screen_cpu;
	580	fbi->map_dma = inf->fixed_screen_dma;
	581	info->screen_base = fbi->map_cpu;
	582	fbi->screen_cpu = fbi->map_cpu;
	583	fbi->screen_dma = fbi->map_dma;
	584	info->fix.smem_start = fbi->screen_dma;
	585	}
	586
	587	/*
	588	* This makes sure that our colour bitfield
	589	* descriptors are correctly initialised.
	590	*/
	591	imxfb_check_var(&info->var, info);
	592
	593	ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
	594	if (ret < 0)
	595	goto failed_cmap;
	596
	597	imxfb_setup_gpio(fbi);
	598
	599	imxfb_set_par(info);
	600	ret = register_framebuffer(info);
	601	if (ret < 0) {
f99c8929	602	dev_err(&pdev->dev, "failed to register framebuffer\n");
7c2f891c SH	603	goto failed_register;
	604	}
	605
	606	imxfb_enable_controller(fbi);
	607
	608	return 0;
	609
	610	failed_register:
	611	fb_dealloc_cmap(&info->cmap);
	612	failed_cmap:
	613	if (!inf->fixed_screen_cpu)
3ae5eaec	614	dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
7c2f891c SH	615	fbi->map_dma);
	616	failed_map:
	617	kfree(info->pseudo_palette);
	618	failed_regs:
	619	release_mem_region(res->start, res->end - res->start);
	620	failed_init:
3ae5eaec	621	platform_set_drvdata(pdev, NULL);
7c2f891c SH	622	framebuffer_release(info);
	623	return ret;
	624	}
	625
3ae5eaec	626	static int imxfb_remove(struct platform_device *pdev)
7c2f891c	627	{
3ae5eaec	628	struct fb_info *info = platform_get_drvdata(pdev);
772a9e63	629	struct imxfb_info *fbi = info->par;
7c2f891c SH	630	struct resource *res;
	631
	632	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	633
772a9e63	634	imxfb_disable_controller(fbi);
7c2f891c SH	635
	636	unregister_framebuffer(info);
	637
	638	fb_dealloc_cmap(&info->cmap);
	639	kfree(info->pseudo_palette);
	640	framebuffer_release(info);
	641
	642	release_mem_region(res->start, res->end - res->start + 1);
3ae5eaec	643	platform_set_drvdata(pdev, NULL);
7c2f891c SH	644
	645	return 0;
	646	}
	647
3ae5eaec	648	void imxfb_shutdown(struct platform_device * dev)
7c2f891c	649	{
3ae5eaec	650	struct fb_info *info = platform_get_drvdata(dev);
772a9e63 SH	651	struct imxfb_info *fbi = info->par;
772a9e63 SH	652	imxfb_disable_controller(fbi);
7c2f891c SH	653	}
7c2f891c SH	654
3ae5eaec	655	static struct platform_driver imxfb_driver = {
7c2f891c SH	656	.probe = imxfb_probe,
	657	.suspend = imxfb_suspend,
	658	.resume = imxfb_resume,
	659	.remove = imxfb_remove,
	660	.shutdown = imxfb_shutdown,
3ae5eaec RK	661	.driver = {
	662	.name = "imx-fb",
	663	},
7c2f891c SH	664	};
	665
	666	int __init imxfb_init(void)
	667	{
3ae5eaec	668	return platform_driver_register(&imxfb_driver);
7c2f891c SH	669	}
	670
	671	static void __exit imxfb_cleanup(void)
	672	{
3ae5eaec	673	platform_driver_unregister(&imxfb_driver);
7c2f891c SH	674	}
	675
	676	module_init(imxfb_init);
	677	module_exit(imxfb_cleanup);
	678
	679	MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
	680	MODULE_AUTHOR("Sascha Hauer, Pengutronix");
	681	MODULE_LICENSE("GPL");