linux/drivers/mtd/nand/autcpu12.c
Yoann Padioleau 632155e659 potential parse error in ifdef
I have made a tool to parse the kernel that does not pre-process the
source.  That means that my parser tries to parse all the code, including
code in the #else branch or code that is not often compiled because the
driver is not very used (or not used at all).  So, my parser sometimes
reports parse error not originally detected by gcc.  Here is my (first)
patch.

[akpm@linux-foundation.org: fix amd8111e.c]
Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Acked-by: Matthew Wilcox <matthew@wil.cx>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Acked-by: James Bottomley <James.Bottomley@steeleye.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-01 08:18:27 -07:00

242 lines
5.8 KiB
C

/*
* drivers/mtd/autcpu12.c
*
* Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
*
* Derived from drivers/mtd/spia.c
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
*
* $Id: autcpu12.c,v 1.23 2005/11/07 11:14:30 gleixner 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
* autronix autcpu12 board, which is a SmartMediaCard. It supports
* 16MiB, 32MiB and 64MiB cards.
*
*
* 02-12-2002 TG Cleanup of module params
*
* 02-20-2002 TG adjusted for different rd/wr adress support
* added support for read device ready/busy line
* added page_cache
*
* 10-06-2002 TG 128K card support added
*/
#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>
#include <asm/sizes.h>
#include <asm/arch/autcpu12.h>
/*
* MTD structure for AUTCPU12 board
*/
static struct mtd_info *autcpu12_mtd = NULL;
static void __iomem *autcpu12_fio_base;
/*
* Define partitions for flash devices
*/
static struct mtd_partition partition_info16k[] = {
{ .name = "AUTCPU12 flash partition 1",
.offset = 0,
.size = 8 * SZ_1M },
{ .name = "AUTCPU12 flash partition 2",
.offset = 8 * SZ_1M,
.size = 8 * SZ_1M },
};
static struct mtd_partition partition_info32k[] = {
{ .name = "AUTCPU12 flash partition 1",
.offset = 0,
.size = 8 * SZ_1M },
{ .name = "AUTCPU12 flash partition 2",
.offset = 8 * SZ_1M,
.size = 24 * SZ_1M },
};
static struct mtd_partition partition_info64k[] = {
{ .name = "AUTCPU12 flash partition 1",
.offset = 0,
.size = 16 * SZ_1M },
{ .name = "AUTCPU12 flash partition 2",
.offset = 16 * SZ_1M,
.size = 48 * SZ_1M },
};
static struct mtd_partition partition_info128k[] = {
{ .name = "AUTCPU12 flash partition 1",
.offset = 0,
.size = 16 * SZ_1M },
{ .name = "AUTCPU12 flash partition 2",
.offset = 16 * SZ_1M,
.size = 112 * SZ_1M },
};
#define NUM_PARTITIONS16K 2
#define NUM_PARTITIONS32K 2
#define NUM_PARTITIONS64K 2
#define NUM_PARTITIONS128K 2
/*
* hardware specific access to control-lines
*
* ALE bit 4 autcpu12_pedr
* CLE bit 5 autcpu12_pedr
* NCE bit 0 fio_ctrl
*
*/
static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *chip = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
void __iomem *addr;
unsigned char bits;
addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
bits = (ctrl & NAND_CLE) << 4;
bits |= (ctrl & NAND_ALE) << 2;
writeb((readb(addr) & ~0x30) | bits, addr);
addr = autcpu12_fio_base + AUTCPU12_SMC_SELECT_OFFSET;
writeb((readb(addr) & ~0x1) | (ctrl & NAND_NCE), addr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
* read device ready pin
*/
int autcpu12_device_ready(struct mtd_info *mtd)
{
void __iomem *addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
return readb(addr) & AUTCPU12_SMC_RDY;
}
/*
* Main initialization routine
*/
static int __init autcpu12_init(void)
{
struct nand_chip *this;
int err = 0;
/* Allocate memory for MTD device structure and private data */
autcpu12_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip),
GFP_KERNEL);
if (!autcpu12_mtd) {
printk("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
err = -ENOMEM;
goto out;
}
/* map physical adress */
autcpu12_fio_base = ioremap(AUTCPU12_PHYS_SMC, SZ_1K);
if (!autcpu12_fio_base) {
printk("Ioremap autcpu12 SmartMedia Card failed\n");
err = -EIO;
goto out_mtd;
}
/* Get pointer to private data */
this = (struct nand_chip *)(&autcpu12_mtd[1]);
/* Initialize structures */
memset(autcpu12_mtd, 0, sizeof(struct mtd_info));
memset(this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
autcpu12_mtd->priv = this;
autcpu12_mtd->owner = THIS_MODULE;
/* Set address of NAND IO lines */
this->IO_ADDR_R = autcpu12_fio_base;
this->IO_ADDR_W = autcpu12_fio_base;
this->cmd_ctrl = autcpu12_hwcontrol;
this->dev_ready = autcpu12_device_ready;
/* 20 us command delay time */
this->chip_delay = 20;
this->ecc.mode = NAND_ECC_SOFT;
/* Enable the following for a flash based bad block table */
/*
this->options = NAND_USE_FLASH_BBT;
*/
this->options = NAND_USE_FLASH_BBT;
/* Scan to find existance of the device */
if (nand_scan(autcpu12_mtd, 1)) {
err = -ENXIO;
goto out_ior;
}
/* Register the partitions */
switch (autcpu12_mtd->size) {
case SZ_16M:
add_mtd_partitions(autcpu12_mtd, partition_info16k,
NUM_PARTITIONS16K);
break;
case SZ_32M:
add_mtd_partitions(autcpu12_mtd, partition_info32k,
NUM_PARTITIONS32K);
break;
case SZ_64M:
add_mtd_partitions(autcpu12_mtd, partition_info64k,
NUM_PARTITIONS64K);
break;
case SZ_128M:
add_mtd_partitions(autcpu12_mtd, partition_info128k,
NUM_PARTITIONS128K);
break;
default:
printk("Unsupported SmartMedia device\n");
err = -ENXIO;
goto out_ior;
}
goto out;
out_ior:
iounmap(autcpu12_fio_base);
out_mtd:
kfree(autcpu12_mtd);
out:
return err;
}
module_init(autcpu12_init);
/*
* Clean up routine
*/
static void __exit autcpu12_cleanup(void)
{
/* Release resources, unregister device */
nand_release(autcpu12_mtd);
/* unmap physical adress */
iounmap(autcpu12_fio_base);
/* Free the MTD device structure */
kfree(autcpu12_mtd);
}
module_exit(autcpu12_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");