[PATCH] imxfb: Add Freescale i.MX framebuffer driver (7c2f891c) · Commits · 戴 / test

drivers/video/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -198,6 +198,14 @@ config FB_SA1100
		If you plan to use the LCD display with your SA-1100 system, say
		Y here.

		config FB_IMX
		tristate "Motorola i.MX LCD support"
		depends on FB && ARM && ARCH_IMX
		select FB_CFB_FILLRECT
		select FB_CFB_COPYAREA
		select FB_CFB_IMAGEBLIT
		select FB_SOFT_CURSOR

		config FB_CYBER2000
		tristate "CyberPro 2000/2010/5000 support"
		depends on FB && PCI && (BROKEN \|\| !SPARC64)

drivers/video/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -90,6 +90,7 @@ obj-$(CONFIG_FB_PMAGB_B) += pmagb-b-fb.o
		obj-$(CONFIG_FB_MAXINE) += maxinefb.o
		obj-$(CONFIG_FB_TX3912) += tx3912fb.o
		obj-$(CONFIG_FB_S1D13XXX) += s1d13xxxfb.o
		obj-$(CONFIG_FB_IMX) += imxfb.o

		# Platform or fallback drivers go here
		obj-$(CONFIG_FB_VESA) += vesafb.o

drivers/video/imxfb.c

0 → 100644

+695 −0

Original line number	Diff line number	Diff line
		/*
		* 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/config.h>
		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/sched.h>
		#include <linux/errno.h>
		#include <linux/string.h>
		#include <linux/interrupt.h>
		#include <linux/slab.h>
		#include <linux/fb.h>
		#include <linux/delay.h>
		#include <linux/init.h>
		#include <linux/ioport.h>
		#include <linux/cpufreq.h>
		#include <linux/device.h>
		#include <linux/dma-mapping.h>

		#include <asm/hardware.h>
		#include <asm/io.h>
		#include <asm/mach-types.h>
		#include <asm/uaccess.h>
		#include <asm/arch/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);

		/* fixed burst length (see erratum 11) */
		LCDC_DMACR = DMACR_BURST \| DMACR_HM(8) \| DMACR_TM(2);

		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,
		.fb_cursor = soft_cursor, /* FIXME: i.MX can do hardware cursor */
		};

		/*
		* 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;

		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(PD10_PF_SPL_SPR);
		imx_gpio_mode(PD11_PF_CONTRAST);
		imx_gpio_mode(PD14_PF_FLM_VSYNC);
		imx_gpio_mode(PD13_PF_LP_HSYNC);
		imx_gpio_mode(PD7_PF_REV);
		imx_gpio_mode(PD8_PF_CLS);

		#ifndef CONFIG_MACH_PIMX1
		/* on PiMX1 used as buffers enable signal
		*/
		imx_gpio_mode(PD9_PF_PS);
		#endif

		#ifndef CONFIG_MACH_MX1FS2
		/* on mx1fs2 this pin is used to (de)activate the display, so we need
		* it as a normal gpio
		*/
		imx_gpio_mode(PD12_PF_ACD_OE);
		#endif

		}

		#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 device *dev, u32 state, u32 level)
		{
		struct imxfb_info *fbi = dev_get_drvdata(dev);
		pr_debug("%s\n",__FUNCTION__);

		if (level == SUSPEND_DISABLE \|\| level == SUSPEND_POWER_DOWN)
		imxfb_disable_controller(fbi);
		return 0;
		}

		static int imxfb_resume(struct device *dev, u32 level)
		{
		struct imxfb_info *fbi = dev_get_drvdata(dev);
		pr_debug("%s\n",__FUNCTION__);

		if (level == RESUME_ENABLE)
		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",__FUNCTION__);

		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;
		info->pseudo_palette = (fbi + 1);

		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.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->pcr = inf->pcr;
		fbi->lscr1 = inf->lscr1;
		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 device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		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 = dev->platform_data;
		if(!inf) {
		dev_err(dev,"No platform_data available\n");
		return -ENOMEM;
		}

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

		fbi = info->par;

		dev_set_drvdata(dev, info);

		ret = imxfb_init_fbinfo(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(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(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(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:
		dev_set_drvdata(dev, NULL);
		framebuffer_release(info);
		return ret;
		}

		static int imxfb_remove(struct device *dev)
		{
		struct platform_device *pdev = to_platform_device(dev);
		struct fb_info *info = dev_get_drvdata(dev);
		struct resource *res;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

		/* disable LCD controller */
		LCDC_RMCR &= ~RMCR_LCDC_EN;

		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);
		dev_set_drvdata(dev, NULL);

		return 0;
		}

		void imxfb_shutdown(struct device * dev)
		{
		/* disable LCD Controller */
		LCDC_RMCR &= ~RMCR_LCDC_EN;
		}

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

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

		static void __exit imxfb_cleanup(void)
		{
		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");

drivers/video/imxfb.h

0 → 100644

+72 −0

Original line number	Diff line number	Diff line
		/*
		* linux/drivers/video/imxfb.h
		*
		* Freescale i.MX Frame Buffer device driver
		*
		* Copyright (C) 2004 S.Hauer, Pengutronix
		*
		* Copyright (C) 1999 Eric A. Thomas
		* 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.
		*/

		/*
		* These are the bitfields for each
		* display depth that we support.
		*/
		struct imxfb_rgb {
		struct fb_bitfield red;
		struct fb_bitfield green;
		struct fb_bitfield blue;
		struct fb_bitfield transp;
		};

		#define RGB_16 (0)
		#define RGB_8 (1)
		#define NR_RGB 2

		struct imxfb_info {
		struct device *dev;
		struct imxfb_rgb *rgb[NR_RGB];

		u_int max_bpp;
		u_int max_xres;
		u_int max_yres;

		/*
		* These are the addresses we mapped
		* the framebuffer memory region to.
		*/
		dma_addr_t map_dma;
		u_char * map_cpu;
		u_int map_size;

		u_char * screen_cpu;
		dma_addr_t screen_dma;
		u_int palette_size;

		dma_addr_t dbar1;
		dma_addr_t dbar2;

		u_int pcr;
		u_int pwmr;
		u_int lscr1;
		u_int cmap_inverse:1,
		cmap_static:1,
		unused:30;

		void (*lcd_power)(int);
		void (*backlight_power)(int);
		};

		#define IMX_NAME "IMX"

		/*
		* Minimum X and Y resolutions
		*/
		#define MIN_XRES 64
		#define MIN_YRES 64

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