/* *  drivers/mtd/nand/h1910.c * *  Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com) * *  Derived from drivers/mtd/nand/edb7312.c *       Copyright (C) 2002 Marius Grger (mag@sysgo.de) *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) * * $Id: h1910.c,v 1.2 2007/09/21 03:09:24 quy Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * *  Overview: *   This is a device driver for the NAND flash device found on the *   iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is *   a 128Mibit (16MiB x 8 bits) NAND flash device. */#include <linux/slab.h>#include <linux/init.h>#include <linux/module.h>#include <linux/mtd/mtd.h>#include <linux/mtd/nand.h>#include <linux/mtd/partitions.h>#include <asm/io.h>#include <asm/arch/hardware.h> /* for CLPS7111_VIRT_BASE */#include <asm/sizes.h>#include <asm/arch/h1900-gpio.h>#include <asm/arch/ipaq.h>/* * MTD structure for EDB7312 board */static struct mtd_info *h1910_nand_mtd = NULL;/* * Module stuff */#ifdef CONFIG_MTD_PARTITIONS/* * Define static partitions for flash device */static struct mtd_partition partition_info[] = {	{ name: "h1910 NAND Flash",		  offset: 0,		  size: 16*1024*1024 }};#define NUM_PARTITIONS 1#endif/*  *	hardware specific access to control-lines */static void h1910_hwcontrol(struct mtd_info *mtd, int cmd) {	struct nand_chip* this = (struct nand_chip *) (mtd->priv);		switch(cmd) {			case NAND_CTL_SETCLE: 		this->IO_ADDR_R |= (1 << 2);		this->IO_ADDR_W |= (1 << 2);		break;	case NAND_CTL_CLRCLE: 		this->IO_ADDR_R &= ~(1 << 2);		this->IO_ADDR_W &= ~(1 << 2);		break;			case NAND_CTL_SETALE:		this->IO_ADDR_R |= (1 << 3);		this->IO_ADDR_W |= (1 << 3);		break;	case NAND_CTL_CLRALE:		this->IO_ADDR_R &= ~(1 << 3);		this->IO_ADDR_W &= ~(1 << 3);		break;			case NAND_CTL_SETNCE:		break;	case NAND_CTL_CLRNCE:		break;	}}/* *	read device ready pin */#if 0static int h1910_device_ready(struct mtd_info *mtd){	return (GPLR(55) & GPIO_bit(55));}#endif/* * Main initialization routine */static int __init h1910_init (void){	struct nand_chip *this;	const char *part_type = 0;	int mtd_parts_nb = 0;	struct mtd_partition *mtd_parts = 0;	void* nandaddr;		if (!machine_is_h1900())		return -ENODEV;			nandaddr = __ioremap(0x08000000, 0x1000, 0, 1);	if (!nandaddr)	{		printk("Failed to ioremap in nand flash.\n");		return -ENOMEM;	};		/* Allocate memory for MTD device structure and private data */	h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + 			     sizeof(struct nand_chip),			     GFP_KERNEL);	if (!h1910_nand_mtd) {		printk("Unable to allocate h1910 NAND MTD device structure.\n");		return -ENOMEM;	}		/* Get pointer to private data */	this = (struct nand_chip *) (&h1910_nand_mtd[1]);		/* Initialize structures */	memset((char *) h1910_nand_mtd, 0, sizeof(struct mtd_info));	memset((char *) this, 0, sizeof(struct nand_chip));		/* Link the private data with the MTD structure */	h1910_nand_mtd->priv = this;		/*	 * Enable VPEN	 */	GPSR(37) = GPIO_bit(37);		/* insert callbacks */	this->IO_ADDR_R = (unsigned long)nandaddr;	this->IO_ADDR_W = (unsigned long)nandaddr;	this->hwcontrol = h1910_hwcontrol;	this->dev_ready = NULL;	/* unknown whether that was correct or not so we will just do it like this */	/* 15 us command delay time */	this->chip_delay = 50;	this->eccmode = NAND_ECC_SOFT;	this->options = NAND_NO_AUTOINCR;		/* Scan to find existence of the device */	if (nand_scan (h1910_nand_mtd, 1)) {		printk(KERN_NOTICE "No NAND device - returning -ENXIO\n");		kfree (h1910_nand_mtd);		return -ENXIO;	}		/* Allocate memory for internal data buffer */	this->data_buf = kmalloc (sizeof(u_char) * (h1910_nand_mtd->oobblock + h1910_nand_mtd->oobsize), GFP_KERNEL);	if (!this->data_buf) {		printk("Unable to allocate NAND data buffer for h1910.\n");		kfree (h1910_nand_mtd);		return -ENOMEM;	}	#ifdef CONFIG_MTD_CMDLINE_PARTS	mtd_parts_nb = parse_cmdline_partitions(h1910_nand_mtd, &mtd_parts, 						"h1910-nand");	if (mtd_parts_nb > 0)	  part_type = "command line";	else	  mtd_parts_nb = 0;#endif	if (mtd_parts_nb == 0)	{		mtd_parts = partition_info;		mtd_parts_nb = NUM_PARTITIONS;		part_type = "static";	}		/* Register the partitions */	printk(KERN_NOTICE "Using %s partition definition\n", part_type);	add_mtd_partitions(h1910_nand_mtd, mtd_parts, mtd_parts_nb);		/* Return happy */	return 0;}module_init(h1910_init);/* * Clean up routine */static void __exit h1910_cleanup (void){	struct nand_chip *this = (struct nand_chip *) &h1910_nand_mtd[1];		/* Unregister the device */	del_mtd_device (h1910_nand_mtd);		/* Free internal data buffer */	kfree (this->data_buf);		/* Free the MTD device structure */	kfree (h1910_nand_mtd);}module_exit(h1910_cleanup);MODULE_LICENSE("GPL");MODULE_AUTHOR("Joshua Wise <joshua at joshuawise dot com>");MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910");