linux/drivers/mtd/nand/h1910.c
Linus Torvalds f5e7e844a5 - More robust parsing especially of xattr data in JFFS2
- Updates to mxc_nand and gpmi drivers to support new boards and device tree
  - Improve consistency of information about ECC strength in NAND devices
  - Clean up partition handling of plat_nand
  - Support NAND drivers without dedicated access to OOB area
  - BCH hardware ECC support for OMAP
  - Other fixes and cleanups, and a few new device IDs
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Merge tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtd

Pull mtd update from David Woodhouse:
 - More robust parsing especially of xattr data in JFFS2
 - Updates to mxc_nand and gpmi drivers to support new boards and device tree
 - Improve consistency of information about ECC strength in NAND devices
 - Clean up partition handling of plat_nand
 - Support NAND drivers without dedicated access to OOB area
 - BCH hardware ECC support for OMAP
 - Other fixes and cleanups, and a few new device IDs

Fixed trivial conflict in drivers/mtd/nand/gpmi-nand/gpmi-nand.c due to
added include files next to each other.

* tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtd: (75 commits)
  mtd: mxc_nand: move ecc strengh setup before nand_scan_tail
  mtd: block2mtd: fix recursive call of mtd_writev
  mtd: gpmi-nand: define ecc.strength
  mtd: of_parts: fix breakage in Kconfig
  mtd: nand: fix scan_read_raw_oob
  mtd: docg3 fix in-middle of blocks reads
  mtd: cfi_cmdset_0002: Slight cleanup of fixup messages
  mtd: add fixup for S29NS512P NOR flash.
  jffs2: allow to complete xattr integrity check on first GC scan
  jffs2: allow to discriminate between recoverable and non-recoverable errors
  mtd: nand: omap: add support for hardware BCH ecc
  ARM: OMAP3: gpmc: add BCH ecc api and modes
  mtd: nand: check the return code of 'read_oob/read_oob_raw'
  mtd: nand: remove 'sndcmd' parameter of 'read_oob/read_oob_raw'
  mtd: m25p80: Add support for Winbond W25Q80BW
  jffs2: get rid of jffs2_sync_super
  jffs2: remove unnecessary GC pass on sync
  jffs2: remove unnecessary GC pass on umount
  jffs2: remove lock_super
  mtd: gpmi: add gpmi support for mx6q
  ...
2012-06-01 16:55:42 -07:00

167 lines
3.9 KiB
C

/*
* drivers/mtd/nand/h1910.c
*
* Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com)
*
* Derived from drivers/mtd/nand/edb7312.c
* Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
* Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
*
* 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 <mach/hardware.h>
#include <asm/sizes.h>
#include <mach/h1900-gpio.h>
#include <mach/ipaq.h>
/*
* MTD structure for EDB7312 board
*/
static struct mtd_info *h1910_nand_mtd = NULL;
/*
* Module stuff
*/
/*
* 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
/*
* hardware specific access to control-lines
*
* NAND_NCE: bit 0 - don't care
* NAND_CLE: bit 1 - address bit 2
* NAND_ALE: bit 2 - address bit 3
*/
static void h1910_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *chip = mtd->priv;
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1));
}
/*
* read device ready pin
*/
#if 0
static 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;
void __iomem *nandaddr;
if (!machine_is_h1900())
return -ENODEV;
nandaddr = ioremap(0x08000000, 0x1000);
if (!nandaddr) {
printk("Failed to ioremap 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");
iounmap((void *)nandaddr);
return -ENOMEM;
}
/* Get pointer to private data */
this = (struct nand_chip *)(&h1910_nand_mtd[1]);
/* Initialize structures */
memset(h1910_nand_mtd, 0, sizeof(struct mtd_info));
memset(this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
h1910_nand_mtd->priv = this;
h1910_nand_mtd->owner = THIS_MODULE;
/*
* Enable VPEN
*/
GPSR(37) = GPIO_bit(37);
/* insert callbacks */
this->IO_ADDR_R = nandaddr;
this->IO_ADDR_W = nandaddr;
this->cmd_ctrl = 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->ecc.mode = NAND_ECC_SOFT;
/* 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);
iounmap((void *)nandaddr);
return -ENXIO;
}
/* Register the partitions */
mtd_device_parse_register(h1910_nand_mtd, NULL, NULL, partition_info,
NUM_PARTITIONS);
/* 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];
/* Release resources, unregister device */
nand_release(h1910_nand_mtd);
/* Release io resource */
iounmap((void *)this->IO_ADDR_W);
/* 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");