kernel-ark/drivers/mtd/nand/ts7250.c
Hartley Sweeten 583ddafe17 [ARM] 5592/1: ep93xx: cleanup platform header includes
arch/arm/mach-ep93xx/include/mach/hardware.h
  1. Properly name the include files so that they are loaded
     from the <mach/*> directory and not the local directory.
  2. Remove including the ts72xx.h header.  This header is not
     generic to the ep93xx platform.  It should only be included
     by the ts72xx specific files that require it.  The only
     two users in the tree are arch/arm/mach-ep93xx/ts72xx.c
     and drivers/mtd/nand/ts7250.c.

arch/arm/mach-ep93xx/include/mach/ts72xx.h
  1. <linux/io.h> should already be included by any user of this
     header.  Doing the include here hides it from being needed
     by the calling source file.

arch/arm/mach-ep93xx/core.c
  1. Remove unnecessary headers.  They were probably included
     originally due to cut-and-paste from other files.
  2. <linux/io.h> should be included not <mach/gpio.h>

arch/arm/mach-ep93xx/adsphere.c
arch/arm/mach-ep93xx/edb93xx.c
arch/arm/mach-ep93xx/gesbc9312.c
arch/arm/mach-ep93xx/micro9.c
arch/arm/mach-ep93xx/ts72xx.c
  1. Remove unnecessary headers.

arch/arm/mach-ep93xx/ts72xx.c
  1. Remove unnecessary headers.
  2. Add platform specific header <mach/ts72xx.h>.

drivers/mtd/nand/ts7250.c
  1. <linux/io.h> should be included not <asm/io.h>.
  2. Add platform specific header <mach/ts72xx.h>.

Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-07-09 16:13:44 +01:00

208 lines
4.7 KiB
C

/*
* drivers/mtd/nand/ts7250.c
*
* Copyright (C) 2004 Technologic Systems (support@embeddedARM.com)
*
* Derived from drivers/mtd/nand/edb7312.c
* Copyright (C) 2004 Marius Gröger (mag@sysgo.de)
*
* Derived from drivers/mtd/nand/autcpu12.c
* 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
* TS-7250 board which utilizes a Samsung 32 Mbyte part.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/ts72xx.h>
#include <asm/sizes.h>
#include <asm/mach-types.h>
/*
* MTD structure for TS7250 board
*/
static struct mtd_info *ts7250_mtd = NULL;
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "cmdlinepart", NULL };
#define NUM_PARTITIONS 3
/*
* Define static partitions for flash device
*/
static struct mtd_partition partition_info32[] = {
{
.name = "TS-BOOTROM",
.offset = 0x00000000,
.size = 0x00004000,
}, {
.name = "Linux",
.offset = 0x00004000,
.size = 0x01d00000,
}, {
.name = "RedBoot",
.offset = 0x01d04000,
.size = 0x002fc000,
},
};
/*
* Define static partitions for flash device
*/
static struct mtd_partition partition_info128[] = {
{
.name = "TS-BOOTROM",
.offset = 0x00000000,
.size = 0x00004000,
}, {
.name = "Linux",
.offset = 0x00004000,
.size = 0x07d00000,
}, {
.name = "RedBoot",
.offset = 0x07d04000,
.size = 0x002fc000,
},
};
#endif
/*
* hardware specific access to control-lines
*
* ctrl:
* NAND_NCE: bit 0 -> bit 2
* NAND_CLE: bit 1 -> bit 1
* NAND_ALE: bit 2 -> bit 0
*/
static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *chip = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned long addr = TS72XX_NAND_CONTROL_VIRT_BASE;
unsigned char bits;
bits = (ctrl & NAND_NCE) << 2;
bits |= ctrl & NAND_CLE;
bits |= (ctrl & NAND_ALE) >> 2;
__raw_writeb((__raw_readb(addr) & ~0x7) | bits, addr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
* read device ready pin
*/
static int ts7250_device_ready(struct mtd_info *mtd)
{
return __raw_readb(TS72XX_NAND_BUSY_VIRT_BASE) & 0x20;
}
/*
* Main initialization routine
*/
static int __init ts7250_init(void)
{
struct nand_chip *this;
const char *part_type = 0;
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = 0;
if (!machine_is_ts72xx() || board_is_ts7200())
return -ENXIO;
/* Allocate memory for MTD device structure and private data */
ts7250_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!ts7250_mtd) {
printk("Unable to allocate TS7250 NAND MTD device structure.\n");
return -ENOMEM;
}
/* Get pointer to private data */
this = (struct nand_chip *)(&ts7250_mtd[1]);
/* Initialize structures */
memset(ts7250_mtd, 0, sizeof(struct mtd_info));
memset(this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
ts7250_mtd->priv = this;
ts7250_mtd->owner = THIS_MODULE;
/* insert callbacks */
this->IO_ADDR_R = (void *)TS72XX_NAND_DATA_VIRT_BASE;
this->IO_ADDR_W = (void *)TS72XX_NAND_DATA_VIRT_BASE;
this->cmd_ctrl = ts7250_hwcontrol;
this->dev_ready = ts7250_device_ready;
this->chip_delay = 15;
this->ecc.mode = NAND_ECC_SOFT;
printk("Searching for NAND flash...\n");
/* Scan to find existence of the device */
if (nand_scan(ts7250_mtd, 1)) {
kfree(ts7250_mtd);
return -ENXIO;
}
#ifdef CONFIG_MTD_PARTITIONS
ts7250_mtd->name = "ts7250-nand";
mtd_parts_nb = parse_mtd_partitions(ts7250_mtd, part_probes, &mtd_parts, 0);
if (mtd_parts_nb > 0)
part_type = "command line";
else
mtd_parts_nb = 0;
#endif
if (mtd_parts_nb == 0) {
mtd_parts = partition_info32;
if (ts7250_mtd->size >= (128 * 0x100000))
mtd_parts = partition_info128;
mtd_parts_nb = NUM_PARTITIONS;
part_type = "static";
}
/* Register the partitions */
printk(KERN_NOTICE "Using %s partition definition\n", part_type);
add_mtd_partitions(ts7250_mtd, mtd_parts, mtd_parts_nb);
/* Return happy */
return 0;
}
module_init(ts7250_init);
/*
* Clean up routine
*/
static void __exit ts7250_cleanup(void)
{
/* Unregister the device */
del_mtd_device(ts7250_mtd);
/* Free the MTD device structure */
kfree(ts7250_mtd);
}
module_exit(ts7250_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jesse Off <joff@embeddedARM.com>");
MODULE_DESCRIPTION("MTD map driver for Technologic Systems TS-7250 board");