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-/*
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- * drivers/mtd/nand/h1910.c
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- *
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- * Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com)
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- *
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- * Derived from drivers/mtd/nand/edb7312.c
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- * Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
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- * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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- * Overview:
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- * This is a device driver for the NAND flash device found on the
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- * iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is
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- * a 128Mibit (16MiB x 8 bits) NAND flash device.
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- */
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-
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-#include <linux/slab.h>
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-#include <linux/init.h>
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-#include <linux/module.h>
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-#include <linux/mtd/mtd.h>
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-#include <linux/mtd/nand.h>
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-#include <linux/mtd/partitions.h>
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-#include <asm/io.h>
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-#include <mach/hardware.h>
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-#include <asm/sizes.h>
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-#include <mach/h1900-gpio.h>
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-#include <mach/ipaq.h>
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-
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-/*
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- * MTD structure for EDB7312 board
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- */
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-static struct mtd_info *h1910_nand_mtd = NULL;
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-
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-/*
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- * Module stuff
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- */
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-
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-/*
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- * Define static partitions for flash device
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- */
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-static struct mtd_partition partition_info[] = {
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- {name:"h1910 NAND Flash",
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- offset:0,
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- size:16 * 1024 * 1024}
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-};
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-
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-#define NUM_PARTITIONS 1
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-
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-/*
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- * hardware specific access to control-lines
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- *
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- * NAND_NCE: bit 0 - don't care
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- * NAND_CLE: bit 1 - address bit 2
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- * NAND_ALE: bit 2 - address bit 3
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- */
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-static void h1910_hwcontrol(struct mtd_info *mtd, int cmd,
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- unsigned int ctrl)
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-{
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- struct nand_chip *chip = mtd->priv;
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-
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- if (cmd != NAND_CMD_NONE)
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- writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1));
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-}
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-
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-/*
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- * read device ready pin
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- */
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-#if 0
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-static int h1910_device_ready(struct mtd_info *mtd)
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-{
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- return (GPLR(55) & GPIO_bit(55));
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-}
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-#endif
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-
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-/*
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- * Main initialization routine
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- */
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-static int __init h1910_init(void)
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-{
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- struct nand_chip *this;
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- void __iomem *nandaddr;
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-
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- if (!machine_is_h1900())
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- return -ENODEV;
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-
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- nandaddr = ioremap(0x08000000, 0x1000);
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- if (!nandaddr) {
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- printk("Failed to ioremap nand flash.\n");
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- return -ENOMEM;
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- }
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-
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- /* Allocate memory for MTD device structure and private data */
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- h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
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- if (!h1910_nand_mtd) {
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- printk("Unable to allocate h1910 NAND MTD device structure.\n");
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- iounmap((void *)nandaddr);
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- return -ENOMEM;
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- }
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-
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- /* Get pointer to private data */
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- this = (struct nand_chip *)(&h1910_nand_mtd[1]);
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-
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- /* Initialize structures */
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- memset(h1910_nand_mtd, 0, sizeof(struct mtd_info));
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- memset(this, 0, sizeof(struct nand_chip));
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-
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- /* Link the private data with the MTD structure */
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- h1910_nand_mtd->priv = this;
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- h1910_nand_mtd->owner = THIS_MODULE;
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-
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- /*
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- * Enable VPEN
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- */
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- GPSR(37) = GPIO_bit(37);
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-
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- /* insert callbacks */
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- this->IO_ADDR_R = nandaddr;
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- this->IO_ADDR_W = nandaddr;
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- this->cmd_ctrl = h1910_hwcontrol;
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- this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */
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- /* 15 us command delay time */
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- this->chip_delay = 50;
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- this->ecc.mode = NAND_ECC_SOFT;
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-
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- /* Scan to find existence of the device */
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- if (nand_scan(h1910_nand_mtd, 1)) {
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- printk(KERN_NOTICE "No NAND device - returning -ENXIO\n");
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- kfree(h1910_nand_mtd);
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- iounmap((void *)nandaddr);
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- return -ENXIO;
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- }
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-
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- /* Register the partitions */
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- mtd_device_parse_register(h1910_nand_mtd, NULL, NULL, partition_info,
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- NUM_PARTITIONS);
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-
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- /* Return happy */
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- return 0;
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-}
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-
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-module_init(h1910_init);
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-
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-/*
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- * Clean up routine
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- */
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-static void __exit h1910_cleanup(void)
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-{
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- struct nand_chip *this = (struct nand_chip *)&h1910_nand_mtd[1];
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-
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- /* Release resources, unregister device */
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- nand_release(h1910_nand_mtd);
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-
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- /* Release io resource */
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- iounmap((void *)this->IO_ADDR_W);
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-
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- /* Free the MTD device structure */
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- kfree(h1910_nand_mtd);
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-}
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-
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-module_exit(h1910_cleanup);
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-
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-MODULE_LICENSE("GPL");
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-MODULE_AUTHOR("Joshua Wise <joshua at joshuawise dot com>");
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-MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910");
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