drivers/video/fbdev/hitfb.c - linux - Git at Google

 /*
  * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
  *
  * (C) 1999 Mihai Spatar
  * (C) 2000 YAEGASHI Takeshi
  * (C) 2003, 2004 Paul Mundt
  * (C) 2003, 2004, 2006 Andriy Skulysh
  *
  *  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.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/fb.h>

 #include <asm/machvec.h>
 #include <linux/uaccess.h>
 #include <asm/io.h>
 #include <asm/hd64461.h>
 #include <cpu/dac.h>

 #define	WIDTH 640

 static struct fb_var_screeninfo hitfb_var = {
 	.activate	= FB_ACTIVATE_NOW,
 	.height		= -1,
 	.width		= -1,
 	.vmode		= FB_VMODE_NONINTERLACED,
 };

 static struct fb_fix_screeninfo hitfb_fix = {
 	.id		= "Hitachi HD64461",
 	.type		= FB_TYPE_PACKED_PIXELS,
 	.accel		= FB_ACCEL_NONE,
 };

 static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset)
 {
 	return (__force volatile void __iomem *)(uintptr_t)offset;
 }

 static u16 hitfb_readw(unsigned int offset)
 {
 	return fb_readw(hitfb_offset_to_addr(offset));
 }

 static void hitfb_writew(u16 value, unsigned int offset)
 {
 	fb_writew(value, hitfb_offset_to_addr(offset));
 }

 static inline void hitfb_accel_wait(void)
 {
 	while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS)
 		;
 }

 static inline void hitfb_accel_start(int truecolor)
 {
 	if (truecolor) {
 		hitfb_writew(6, HD64461_GRCFGR);
 	} else {
 		hitfb_writew(7, HD64461_GRCFGR);
 	}
 }

 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
 					u16 width, u16 height)
 {
 	u32 saddr = WIDTH * dy + dx;
 	if (truecolor)
 		saddr <<= 1;

 	hitfb_writew(width-1, HD64461_BBTDWR);
 	hitfb_writew(height-1, HD64461_BBTDHR);

 	hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL);
 	hitfb_writew(saddr >> 16, HD64461_BBTDSARH);

 }

 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
 				      u16 dy, u16 width, u16 height, u16 rop,
 				      u32 mask_addr)
 {
 	u32 saddr, daddr;
 	u32 maddr = 0;

 	height--;
 	width--;
 	hitfb_writew(rop, HD64461_BBTROPR);
 	if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
 		saddr = WIDTH * (sy + height) + sx + width;
 		daddr = WIDTH * (dy + height) + dx + width;
 		if (mask_addr) {
 			if (truecolor)
 				maddr = ((width >> 3) + 1) * (height + 1) - 1;
 			else
 				maddr =
 				    (((width >> 4) + 1) * (height + 1) - 1) * 2;

 			hitfb_writew((1 << 5) | 1, HD64461_BBTMDR);
 		} else
 			hitfb_writew(1, HD64461_BBTMDR);
 	} else {
 		saddr = WIDTH * sy + sx;
 		daddr = WIDTH * dy + dx;
 		if (mask_addr) {
 			hitfb_writew((1 << 5), HD64461_BBTMDR);
 		} else {
 			hitfb_writew(0, HD64461_BBTMDR);
 		}
 	}
 	if (truecolor) {
 		saddr <<= 1;
 		daddr <<= 1;
 	}
 	hitfb_writew(width, HD64461_BBTDWR);
 	hitfb_writew(height, HD64461_BBTDHR);
 	hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL);
 	hitfb_writew(saddr >> 16, HD64461_BBTSSARH);
 	hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL);
 	hitfb_writew(daddr >> 16, HD64461_BBTDSARH);
 	if (mask_addr) {
 		maddr += mask_addr;
 		hitfb_writew(maddr & 0xffff, HD64461_BBTMARL);
 		hitfb_writew(maddr >> 16, HD64461_BBTMARH);
 	}
 	hitfb_accel_start(truecolor);
 }

 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
 {
 	if (rect->rop != ROP_COPY)
 		cfb_fillrect(p, rect);
 	else {
 		hitfb_accel_wait();
 		hitfb_writew(0x00f0, HD64461_BBTROPR);
 		hitfb_writew(16, HD64461_BBTMDR);

 		if (p->var.bits_per_pixel == 16) {
 			hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color],
 				  HD64461_GRSCR);
 			hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
 					     rect->height);
 			hitfb_accel_start(1);
 		} else {
 			hitfb_writew(rect->color, HD64461_GRSCR);
 			hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
 					     rect->height);
 			hitfb_accel_start(0);
 		}
 	}
 }

 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
 {
 	hitfb_accel_wait();
 	hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
 			   area->dx, area->dy, area->width, area->height,
 			   0x00cc, 0);
 }

 static int hitfb_pan_display(struct fb_var_screeninfo *var,
 			     struct fb_info *info)
 {
 	int xoffset = var->xoffset;
 	int yoffset = var->yoffset;

 	if (xoffset != 0)
 		return -EINVAL;

 	hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);

 	return 0;
 }

 static int hitfb_blank(int blank_mode, struct fb_info *info)
 {
 	unsigned short v;

 	if (blank_mode) {
 		v = hitfb_readw(HD64461_LDR1);
 		v &= ~HD64461_LDR1_DON;
 		hitfb_writew(v, HD64461_LDR1);

 		v = hitfb_readw(HD64461_LCDCCR);
 		v |= HD64461_LCDCCR_MOFF;
 		hitfb_writew(v, HD64461_LCDCCR);

 		v = hitfb_readw(HD64461_STBCR);
 		v |= HD64461_STBCR_SLCDST;
 		hitfb_writew(v, HD64461_STBCR);
 	} else {
 		v = hitfb_readw(HD64461_STBCR);
 		v &= ~HD64461_STBCR_SLCDST;
 		hitfb_writew(v, HD64461_STBCR);

 		v = hitfb_readw(HD64461_LCDCCR);
 		v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
 		hitfb_writew(v, HD64461_LCDCCR);

 		do {
 		    v = hitfb_readw(HD64461_LCDCCR);
 		} while(v&HD64461_LCDCCR_STBACK);

 		v = hitfb_readw(HD64461_LDR1);
 		v |= HD64461_LDR1_DON;
 		hitfb_writew(v, HD64461_LDR1);
 	}
 	return 0;
 }

 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 			   unsigned blue, unsigned transp, struct fb_info *info)
 {
 	if (regno >= 256)
 		return 1;

 	switch (info->var.bits_per_pixel) {
 	case 8:
 		hitfb_writew(regno << 8, HD64461_CPTWAR);
 		hitfb_writew(red >> 10, HD64461_CPTWDR);
 		hitfb_writew(green >> 10, HD64461_CPTWDR);
 		hitfb_writew(blue >> 10, HD64461_CPTWDR);
 		break;
 	case 16:
 		if (regno >= 16)
 			return 1;
 		((u32 *) (info->pseudo_palette))[regno] =
 		    ((red & 0xf800)) |
 		    ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 		break;
 	}
 	return 0;
 }

 static int hitfb_sync(struct fb_info *info)
 {
 	hitfb_accel_wait();

 	return 0;
 }

 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 {
 	int maxy;

 	var->xres = info->var.xres;
 	var->xres_virtual = info->var.xres;
 	var->yres = info->var.yres;

 	if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
 		var->bits_per_pixel = info->var.bits_per_pixel;

 	if (var->yres_virtual < var->yres)
 		var->yres_virtual = var->yres;

 	maxy = info->fix.smem_len / var->xres;

 	if (var->bits_per_pixel == 16)
 		maxy /= 2;

 	if (var->yres_virtual > maxy)
 		var->yres_virtual = maxy;

 	var->xoffset = 0;
 	var->yoffset = 0;

 	switch (var->bits_per_pixel) {
 	case 8:
 		var->red.offset = 0;
 		var->red.length = 8;
 		var->green.offset = 0;
 		var->green.length = 8;
 		var->blue.offset = 0;
 		var->blue.length = 8;
 		var->transp.offset = 0;
 		var->transp.length = 0;
 		break;
 	case 16:		/* RGB 565 */
 		var->red.offset = 11;
 		var->red.length = 5;
 		var->green.offset = 5;
 		var->green.length = 6;
 		var->blue.offset = 0;
 		var->blue.length = 5;
 		var->transp.offset = 0;
 		var->transp.length = 0;
 		break;
 	}

 	return 0;
 }

 static int hitfb_set_par(struct fb_info *info)
 {
 	unsigned short ldr3;

 	switch (info->var.bits_per_pixel) {
 	case 8:
 		info->fix.line_length = info->var.xres;
 		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 		info->fix.ypanstep = 16;
 		break;
 	case 16:
 		info->fix.line_length = info->var.xres*2;
 		info->fix.visual = FB_VISUAL_TRUECOLOR;
 		info->fix.ypanstep = 8;
 		break;
 	}

 	hitfb_writew(info->fix.line_length, HD64461_LCDCLOR);
 	ldr3 = hitfb_readw(HD64461_LDR3);
 	ldr3 &= ~15;
 	ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
 	hitfb_writew(ldr3, HD64461_LDR3);
 	return 0;
 }

 static const struct fb_ops hitfb_ops = {
 	.owner		= THIS_MODULE,
 	__FB_DEFAULT_IOMEM_OPS_RDWR,
 	.fb_check_var	= hitfb_check_var,
 	.fb_set_par	= hitfb_set_par,
 	.fb_setcolreg	= hitfb_setcolreg,
 	.fb_blank	= hitfb_blank,
 	.fb_sync	= hitfb_sync,
 	.fb_pan_display = hitfb_pan_display,
 	.fb_fillrect	= hitfb_fillrect,
 	.fb_copyarea	= hitfb_copyarea,
 	.fb_imageblit	= cfb_imageblit,
 	__FB_DEFAULT_IOMEM_OPS_MMAP,
 };

 static int hitfb_probe(struct platform_device *dev)
 {
 	unsigned short lcdclor, ldr3, ldvndr;
 	struct fb_info *info;
 	int ret;

 	if (fb_get_options("hitfb", NULL))
 		return -ENODEV;

 	hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
 	hitfb_fix.mmio_len = 0x1000;
 	hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
 	hitfb_fix.smem_len = 512 * 1024;

 	lcdclor = hitfb_readw(HD64461_LCDCLOR);
 	ldvndr = hitfb_readw(HD64461_LDVNDR);
 	ldr3 = hitfb_readw(HD64461_LDR3);

 	switch (ldr3 & 15) {
 	default:
 	case 4:
 		hitfb_var.bits_per_pixel = 8;
 		hitfb_var.xres = lcdclor;
 		break;
 	case 8:
 		hitfb_var.bits_per_pixel = 16;
 		hitfb_var.xres = lcdclor / 2;
 		break;
 	}
 	hitfb_fix.line_length = lcdclor;
 	hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
 	    FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
 	hitfb_var.yres = ldvndr + 1;
 	hitfb_var.xres_virtual = hitfb_var.xres;
 	hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
 	switch (hitfb_var.bits_per_pixel) {
 	case 8:
 		hitfb_var.red.offset = 0;
 		hitfb_var.red.length = 8;
 		hitfb_var.green.offset = 0;
 		hitfb_var.green.length = 8;
 		hitfb_var.blue.offset = 0;
 		hitfb_var.blue.length = 8;
 		hitfb_var.transp.offset = 0;
 		hitfb_var.transp.length = 0;
 		break;
 	case 16:		/* RGB 565 */
 		hitfb_var.red.offset = 11;
 		hitfb_var.red.length = 5;
 		hitfb_var.green.offset = 5;
 		hitfb_var.green.length = 6;
 		hitfb_var.blue.offset = 0;
 		hitfb_var.blue.length = 5;
 		hitfb_var.transp.offset = 0;
 		hitfb_var.transp.length = 0;
 		break;
 	}

 	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
 	if (unlikely(!info))
 		return -ENOMEM;

 	info->fbops = &hitfb_ops;
 	info->var = hitfb_var;
 	info->fix = hitfb_fix;
 	info->pseudo_palette = info->par;
 	info->flags = FBINFO_HWACCEL_YPAN |
 		FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;

 	info->screen_base = (char __iomem *)(uintptr_t)hitfb_fix.smem_start;

 	ret = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (unlikely(ret < 0))
 		goto err_fb;

 	ret = register_framebuffer(info);
 	if (unlikely(ret < 0))
 		goto err;

 	platform_set_drvdata(dev, info);

 	fb_info(info, "%s frame buffer device\n", info->fix.id);

 	return 0;

 err:
 	fb_dealloc_cmap(&info->cmap);
 err_fb:
 	framebuffer_release(info);
 	return ret;
 }

 static void hitfb_remove(struct platform_device *dev)
 {
 	struct fb_info *info = platform_get_drvdata(dev);

 	unregister_framebuffer(info);
 	fb_dealloc_cmap(&info->cmap);
 	framebuffer_release(info);
 }

 static int hitfb_suspend(struct device *dev)
 {
 	u16 v;

 	hitfb_blank(1, NULL);
 	v = hitfb_readw(HD64461_STBCR);
 	v |= HD64461_STBCR_SLCKE_IST;
 	hitfb_writew(v, HD64461_STBCR);

 	return 0;
 }

 static int hitfb_resume(struct device *dev)
 {
 	u16 v;

 	v = hitfb_readw(HD64461_STBCR);
 	v &= ~HD64461_STBCR_SLCKE_OST;
 	msleep(100);
 	v = hitfb_readw(HD64461_STBCR);
 	v &= ~HD64461_STBCR_SLCKE_IST;
 	hitfb_writew(v, HD64461_STBCR);
 	hitfb_blank(0, NULL);

 	return 0;
 }

 static const struct dev_pm_ops hitfb_dev_pm_ops = {
 	.suspend	= hitfb_suspend,
 	.resume		= hitfb_resume,
 };

 static struct platform_driver hitfb_driver = {
 	.probe		= hitfb_probe,
 	.remove		= hitfb_remove,
 	.driver		= {
 		.name	= "hitfb",
 		.pm	= &hitfb_dev_pm_ops,
 	},
 };

 static struct platform_device hitfb_device = {
 	.name	= "hitfb",
 	.id	= -1,
 };

 static int __init hitfb_init(void)
 {
 	int ret;

 	ret = platform_driver_register(&hitfb_driver);
 	if (!ret) {
 		ret = platform_device_register(&hitfb_device);
 		if (ret)
 			platform_driver_unregister(&hitfb_driver);
 	}
 	return ret;
 }


 static void __exit hitfb_exit(void)
 {
 	platform_device_unregister(&hitfb_device);
 	platform_driver_unregister(&hitfb_driver);
 }

 module_init(hitfb_init);
 module_exit(hitfb_exit);

 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
	*
	* (C) 1999 Mihai Spatar
	* (C) 2000 YAEGASHI Takeshi
	* (C) 2003, 2004 Paul Mundt
	* (C) 2003, 2004, 2006 Andriy Skulysh
	*
	* 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.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/mm.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/platform_device.h>
	#include <linux/fb.h>

	#include <asm/machvec.h>
	#include <linux/uaccess.h>
	#include <asm/io.h>
	#include <asm/hd64461.h>
	#include <cpu/dac.h>

	#define WIDTH 640

	static struct fb_var_screeninfo hitfb_var = {
	.activate = FB_ACTIVATE_NOW,
	.height = -1,
	.width = -1,
	.vmode = FB_VMODE_NONINTERLACED,
	};

	static struct fb_fix_screeninfo hitfb_fix = {
	.id = "Hitachi HD64461",
	.type = FB_TYPE_PACKED_PIXELS,
	.accel = FB_ACCEL_NONE,
	};

	static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset)
	{
	return (__force volatile void __iomem *)(uintptr_t)offset;
	}

	static u16 hitfb_readw(unsigned int offset)
	{
	return fb_readw(hitfb_offset_to_addr(offset));
	}

	static void hitfb_writew(u16 value, unsigned int offset)
	{
	fb_writew(value, hitfb_offset_to_addr(offset));
	}

	static inline void hitfb_accel_wait(void)
	{
	while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS)
	;
	}

	static inline void hitfb_accel_start(int truecolor)
	{
	if (truecolor) {
	hitfb_writew(6, HD64461_GRCFGR);
	} else {
	hitfb_writew(7, HD64461_GRCFGR);
	}
	}

	static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
	u16 width, u16 height)
	{
	u32 saddr = WIDTH * dy + dx;
	if (truecolor)
	saddr <<= 1;

	hitfb_writew(width-1, HD64461_BBTDWR);
	hitfb_writew(height-1, HD64461_BBTDHR);

	hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL);
	hitfb_writew(saddr >> 16, HD64461_BBTDSARH);

	}

	static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
	u16 dy, u16 width, u16 height, u16 rop,
	u32 mask_addr)
	{
	u32 saddr, daddr;
	u32 maddr = 0;

	height--;
	width--;
	hitfb_writew(rop, HD64461_BBTROPR);
	if ((sy < dy) \|\| ((sy == dy) && (sx <= dx))) {
	saddr = WIDTH * (sy + height) + sx + width;
	daddr = WIDTH * (dy + height) + dx + width;
	if (mask_addr) {
	if (truecolor)
	maddr = ((width >> 3) + 1) * (height + 1) - 1;
	else
	maddr =
	(((width >> 4) + 1) * (height + 1) - 1) * 2;

	hitfb_writew((1 << 5) \| 1, HD64461_BBTMDR);
	} else
	hitfb_writew(1, HD64461_BBTMDR);
	} else {
	saddr = WIDTH * sy + sx;
	daddr = WIDTH * dy + dx;
	if (mask_addr) {
	hitfb_writew((1 << 5), HD64461_BBTMDR);
	} else {
	hitfb_writew(0, HD64461_BBTMDR);
	}
	}
	if (truecolor) {
	saddr <<= 1;
	daddr <<= 1;
	}
	hitfb_writew(width, HD64461_BBTDWR);
	hitfb_writew(height, HD64461_BBTDHR);
	hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL);
	hitfb_writew(saddr >> 16, HD64461_BBTSSARH);
	hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL);
	hitfb_writew(daddr >> 16, HD64461_BBTDSARH);
	if (mask_addr) {
	maddr += mask_addr;
	hitfb_writew(maddr & 0xffff, HD64461_BBTMARL);
	hitfb_writew(maddr >> 16, HD64461_BBTMARH);
	}
	hitfb_accel_start(truecolor);
	}

	static void hitfb_fillrect(struct fb_info p, const struct fb_fillrect rect)
	{
	if (rect->rop != ROP_COPY)
	cfb_fillrect(p, rect);
	else {
	hitfb_accel_wait();
	hitfb_writew(0x00f0, HD64461_BBTROPR);
	hitfb_writew(16, HD64461_BBTMDR);

	if (p->var.bits_per_pixel == 16) {
	hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color],
	HD64461_GRSCR);
	hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
	rect->height);
	hitfb_accel_start(1);
	} else {
	hitfb_writew(rect->color, HD64461_GRSCR);
	hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
	rect->height);
	hitfb_accel_start(0);
	}
	}
	}

	static void hitfb_copyarea(struct fb_info p, const struct fb_copyarea area)
	{
	hitfb_accel_wait();
	hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
	area->dx, area->dy, area->width, area->height,
	0x00cc, 0);
	}

	static int hitfb_pan_display(struct fb_var_screeninfo *var,
	struct fb_info *info)
	{
	int xoffset = var->xoffset;
	int yoffset = var->yoffset;

	if (xoffset != 0)
	return -EINVAL;

	hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);

	return 0;
	}

	static int hitfb_blank(int blank_mode, struct fb_info *info)
	{
	unsigned short v;

	if (blank_mode) {
	v = hitfb_readw(HD64461_LDR1);
	v &= ~HD64461_LDR1_DON;
	hitfb_writew(v, HD64461_LDR1);

	v = hitfb_readw(HD64461_LCDCCR);
	v \|= HD64461_LCDCCR_MOFF;
	hitfb_writew(v, HD64461_LCDCCR);

	v = hitfb_readw(HD64461_STBCR);
	v \|= HD64461_STBCR_SLCDST;
	hitfb_writew(v, HD64461_STBCR);
	} else {
	v = hitfb_readw(HD64461_STBCR);
	v &= ~HD64461_STBCR_SLCDST;
	hitfb_writew(v, HD64461_STBCR);

	v = hitfb_readw(HD64461_LCDCCR);
	v &= ~(HD64461_LCDCCR_MOFF \| HD64461_LCDCCR_STREQ);
	hitfb_writew(v, HD64461_LCDCCR);

	do {
	v = hitfb_readw(HD64461_LCDCCR);
	} while(v&HD64461_LCDCCR_STBACK);

	v = hitfb_readw(HD64461_LDR1);
	v \|= HD64461_LDR1_DON;
	hitfb_writew(v, HD64461_LDR1);
	}
	return 0;
	}

	static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
	unsigned blue, unsigned transp, struct fb_info *info)
	{
	if (regno >= 256)
	return 1;

	switch (info->var.bits_per_pixel) {
	case 8:
	hitfb_writew(regno << 8, HD64461_CPTWAR);
	hitfb_writew(red >> 10, HD64461_CPTWDR);
	hitfb_writew(green >> 10, HD64461_CPTWDR);
	hitfb_writew(blue >> 10, HD64461_CPTWDR);
	break;
	case 16:
	if (regno >= 16)
	return 1;
	((u32 *) (info->pseudo_palette))[regno] =
	((red & 0xf800)) \|
	((green & 0xfc00) >> 5) \| ((blue & 0xf800) >> 11);
	break;
	}
	return 0;
	}

	static int hitfb_sync(struct fb_info *info)
	{
	hitfb_accel_wait();

	return 0;
	}

	static int hitfb_check_var(struct fb_var_screeninfo var, struct fb_info info)
	{
	int maxy;

	var->xres = info->var.xres;
	var->xres_virtual = info->var.xres;
	var->yres = info->var.yres;

	if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
	var->bits_per_pixel = info->var.bits_per_pixel;

	if (var->yres_virtual < var->yres)
	var->yres_virtual = var->yres;

	maxy = info->fix.smem_len / var->xres;

	if (var->bits_per_pixel == 16)
	maxy /= 2;

	if (var->yres_virtual > maxy)
	var->yres_virtual = maxy;

	var->xoffset = 0;
	var->yoffset = 0;

	switch (var->bits_per_pixel) {
	case 8:
	var->red.offset = 0;
	var->red.length = 8;
	var->green.offset = 0;
	var->green.length = 8;
	var->blue.offset = 0;
	var->blue.length = 8;
	var->transp.offset = 0;
	var->transp.length = 0;
	break;
	case 16: /* RGB 565 */
	var->red.offset = 11;
	var->red.length = 5;
	var->green.offset = 5;
	var->green.length = 6;
	var->blue.offset = 0;
	var->blue.length = 5;
	var->transp.offset = 0;
	var->transp.length = 0;
	break;
	}

	return 0;
	}

	static int hitfb_set_par(struct fb_info *info)
	{
	unsigned short ldr3;

	switch (info->var.bits_per_pixel) {
	case 8:
	info->fix.line_length = info->var.xres;
	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
	info->fix.ypanstep = 16;
	break;
	case 16:
	info->fix.line_length = info->var.xres*2;
	info->fix.visual = FB_VISUAL_TRUECOLOR;
	info->fix.ypanstep = 8;
	break;
	}

	hitfb_writew(info->fix.line_length, HD64461_LCDCLOR);
	ldr3 = hitfb_readw(HD64461_LDR3);
	ldr3 &= ~15;
	ldr3 \|= (info->var.bits_per_pixel == 8) ? 4 : 8;
	hitfb_writew(ldr3, HD64461_LDR3);
	return 0;
	}

	static const struct fb_ops hitfb_ops = {
	.owner = THIS_MODULE,
	__FB_DEFAULT_IOMEM_OPS_RDWR,
	.fb_check_var = hitfb_check_var,
	.fb_set_par = hitfb_set_par,
	.fb_setcolreg = hitfb_setcolreg,
	.fb_blank = hitfb_blank,
	.fb_sync = hitfb_sync,
	.fb_pan_display = hitfb_pan_display,
	.fb_fillrect = hitfb_fillrect,
	.fb_copyarea = hitfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	__FB_DEFAULT_IOMEM_OPS_MMAP,
	};

	static int hitfb_probe(struct platform_device *dev)
	{
	unsigned short lcdclor, ldr3, ldvndr;
	struct fb_info *info;
	int ret;

	if (fb_get_options("hitfb", NULL))
	return -ENODEV;

	hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
	hitfb_fix.mmio_len = 0x1000;
	hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
	hitfb_fix.smem_len = 512 * 1024;

	lcdclor = hitfb_readw(HD64461_LCDCLOR);
	ldvndr = hitfb_readw(HD64461_LDVNDR);
	ldr3 = hitfb_readw(HD64461_LDR3);

	switch (ldr3 & 15) {
	default:
	case 4:
	hitfb_var.bits_per_pixel = 8;
	hitfb_var.xres = lcdclor;
	break;
	case 8:
	hitfb_var.bits_per_pixel = 16;
	hitfb_var.xres = lcdclor / 2;
	break;
	}
	hitfb_fix.line_length = lcdclor;
	hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
	FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	hitfb_var.yres = ldvndr + 1;
	hitfb_var.xres_virtual = hitfb_var.xres;
	hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
	switch (hitfb_var.bits_per_pixel) {
	case 8:
	hitfb_var.red.offset = 0;
	hitfb_var.red.length = 8;
	hitfb_var.green.offset = 0;
	hitfb_var.green.length = 8;
	hitfb_var.blue.offset = 0;
	hitfb_var.blue.length = 8;
	hitfb_var.transp.offset = 0;
	hitfb_var.transp.length = 0;
	break;
	case 16: /* RGB 565 */
	hitfb_var.red.offset = 11;
	hitfb_var.red.length = 5;
	hitfb_var.green.offset = 5;
	hitfb_var.green.length = 6;
	hitfb_var.blue.offset = 0;
	hitfb_var.blue.length = 5;
	hitfb_var.transp.offset = 0;
	hitfb_var.transp.length = 0;
	break;
	}

	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
	if (unlikely(!info))
	return -ENOMEM;

	info->fbops = &hitfb_ops;
	info->var = hitfb_var;
	info->fix = hitfb_fix;
	info->pseudo_palette = info->par;
	info->flags = FBINFO_HWACCEL_YPAN \|
	FBINFO_HWACCEL_FILLRECT \| FBINFO_HWACCEL_COPYAREA;

	info->screen_base = (char __iomem *)(uintptr_t)hitfb_fix.smem_start;

	ret = fb_alloc_cmap(&info->cmap, 256, 0);
	if (unlikely(ret < 0))
	goto err_fb;

	ret = register_framebuffer(info);
	if (unlikely(ret < 0))
	goto err;

	platform_set_drvdata(dev, info);

	fb_info(info, "%s frame buffer device\n", info->fix.id);

	return 0;

	err:
	fb_dealloc_cmap(&info->cmap);
	err_fb:
	framebuffer_release(info);
	return ret;
	}

	static void hitfb_remove(struct platform_device *dev)
	{
	struct fb_info *info = platform_get_drvdata(dev);

	unregister_framebuffer(info);
	fb_dealloc_cmap(&info->cmap);
	framebuffer_release(info);
	}

	static int hitfb_suspend(struct device *dev)
	{
	u16 v;

	hitfb_blank(1, NULL);
	v = hitfb_readw(HD64461_STBCR);
	v \|= HD64461_STBCR_SLCKE_IST;
	hitfb_writew(v, HD64461_STBCR);

	return 0;
	}

	static int hitfb_resume(struct device *dev)
	{
	u16 v;

	v = hitfb_readw(HD64461_STBCR);
	v &= ~HD64461_STBCR_SLCKE_OST;
	msleep(100);
	v = hitfb_readw(HD64461_STBCR);
	v &= ~HD64461_STBCR_SLCKE_IST;
	hitfb_writew(v, HD64461_STBCR);
	hitfb_blank(0, NULL);

	return 0;
	}

	static const struct dev_pm_ops hitfb_dev_pm_ops = {
	.suspend = hitfb_suspend,
	.resume = hitfb_resume,
	};

	static struct platform_driver hitfb_driver = {
	.probe = hitfb_probe,
	.remove = hitfb_remove,
	.driver = {
	.name = "hitfb",
	.pm = &hitfb_dev_pm_ops,
	},
	};

	static struct platform_device hitfb_device = {
	.name = "hitfb",
	.id = -1,
	};

	static int __init hitfb_init(void)
	{
	int ret;

	ret = platform_driver_register(&hitfb_driver);
	if (!ret) {
	ret = platform_device_register(&hitfb_device);
	if (ret)
	platform_driver_unregister(&hitfb_driver);
	}
	return ret;
	}


	static void __exit hitfb_exit(void)
	{
	platform_device_unregister(&hitfb_device);
	platform_driver_unregister(&hitfb_driver);
	}

	module_init(hitfb_init);
	module_exit(hitfb_exit);

	MODULE_LICENSE("GPL");