From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Wed, 27 May 2009 09:34:26 -0500
Subject: [U-Boot] [U-BOOT] nand merge problem
In-Reply-To: <4A1C8C3D.6000108@gmail.com>
References: <4A1B9E53.20406@gmail.com> <4A1BB261.7080808@gmail.com>
	<20090526211706.GB4669@b07421-ec1.am.freescale.net>
	<4A1C8C3D.6000108@gmail.com>
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To: u-boot@lists.denx.de

xiangfu_gmail wrote:
> static void jz_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
> {
> 	struct nand_chip *this = (struct nand_chip *)(mtd->priv);
> 
> 	if (ctrl & NAND_CTRL_CHANGE) {
> 		if (ctrl & NAND_NCE)
> 			REG_EMC_NFCSR |= EMC_NFCSR_NFCE1;
> 		else
> 			REG_EMC_NFCSR &= ~EMC_NFCSR_NFCE1;
> 
> 		if (ctrl & NAND_CLE)
> 			this->IO_ADDR_W = (void __iomem *)
> 		((unsigned long)(this->IO_ADDR_W) | 0x00008000);
> 		else			
> 			this->IO_ADDR_W = (void __iomem *)
> 		((unsigned long)(this->IO_ADDR_W) & ~0x00008000);
> 
> 		if (ctrl & NAND_ALE)
> 			this->IO_ADDR_W = (void __iomem *)
> 		((unsigned long)(this->IO_ADDR_W) | 0x00010000);
> 		else
> 			this->IO_ADDR_W = (void __iomem *)
> 		((unsigned long)(this->IO_ADDR_W) & ~0x00010000);
> 
> 	}
> }

Nowhere in this function do you issue the command...  See 
cpu/ppc4xx/ndfc.c for a simple hwcontrol function.

-Scott