/*
* drivers/mtd/nand/edb7312.c
*
- * Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
+ * Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
*
* Derived from drivers/mtd/nand/autcpu12.c
* Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
*
- * $Id: edb7312.c,v 1.8 2004/07/12 15:03:26 dwmw2 Exp $
+ * $Id: edb7312.c,v 1.12 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
#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/arch/hardware.h> /* for CLPS7111_VIRT_BASE */
#include <asm/sizes.h>
#include <asm/hardware/clps7111.h>
* Module stuff
*/
-static int ep7312_fio_pbase = EP7312_FIO_PBASE;
-static int ep7312_pxdr = EP7312_PXDR;
-static int ep7312_pxddr = EP7312_PXDDR;
-
-#ifdef MODULE
-MODULE_PARM(ep7312_fio_pbase, "i");
-MODULE_PARM(ep7312_pxdr, "i");
-MODULE_PARM(ep7312_pxddr, "i");
-
-__setup("ep7312_fio_pbase=",ep7312_fio_pbase);
-__setup("ep7312_pxdr=",ep7312_pxdr);
-__setup("ep7312_pxddr=",ep7312_pxddr);
-#endif
+static unsigned long ep7312_fio_pbase = EP7312_FIO_PBASE;
+static void __iomem *ep7312_pxdr = (void __iomem *)EP7312_PXDR;
+static void __iomem *ep7312_pxddr = (void __iomem *)EP7312_PXDDR;
#ifdef CONFIG_MTD_PARTITIONS
/*
* Define static partitions for flash device
*/
static struct mtd_partition partition_info[] = {
- { .name = "EP7312 Nand Flash",
- .offset = 0,
- .size = 8*1024*1024 }
+ {.name = "EP7312 Nand Flash",
+ .offset = 0,
+ .size = 8 * 1024 * 1024}
};
+
#define NUM_PARTITIONS 1
#endif
-
-/*
+/*
* hardware specific access to control-lines
+ *
+ * NAND_NCE: bit 0 -> bit 7
+ * NAND_CLE: bit 1 -> bit 4
+ * NAND_ALE: bit 2 -> bit 5
*/
-static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd)
+static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
- switch(cmd) {
-
- case NAND_CTL_SETCLE:
- clps_writeb(clps_readb(ep7312_pxdr) | 0x10, ep7312_pxdr);
- break;
- case NAND_CTL_CLRCLE:
- clps_writeb(clps_readb(ep7312_pxdr) & ~0x10, ep7312_pxdr);
- break;
-
- case NAND_CTL_SETALE:
- clps_writeb(clps_readb(ep7312_pxdr) | 0x20, ep7312_pxdr);
- break;
- case NAND_CTL_CLRALE:
- clps_writeb(clps_readb(ep7312_pxdr) & ~0x20, ep7312_pxdr);
- break;
-
- case NAND_CTL_SETNCE:
- clps_writeb((clps_readb(ep7312_pxdr) | 0x80) & ~0x40, ep7312_pxdr);
- break;
- case NAND_CTL_CLRNCE:
- clps_writeb((clps_readb(ep7312_pxdr) | 0x80) | 0x40, ep7312_pxdr);
- break;
+ struct nand_chip *chip = mtd->priv;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ unsigned char bits;
+
+ bits = (ctrl & (NAND_CLE | NAND_ALE)) << 3;
+ bits = (ctrl & NAND_NCE) << 7;
+
+ clps_writeb((clps_readb(ep7312_pxdr) & 0xB0) | 0x10,
+ ep7312_pxdr);
}
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, chip->IO_ADDR_W);
}
/*
{
return 1;
}
+
#ifdef CONFIG_MTD_PARTITIONS
const char *part_probes[] = { "cmdlinepart", NULL };
#endif
/*
* Main initialization routine
*/
-static int __init ep7312_init (void)
+static int __init ep7312_init(void)
{
struct nand_chip *this;
const char *part_type = 0;
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = 0;
- int ep7312_fio_base;
-
+ void __iomem *ep7312_fio_base;
+
/* Allocate memory for MTD device structure and private data */
- ep7312_mtd = kmalloc(sizeof(struct mtd_info) +
- sizeof(struct nand_chip),
- GFP_KERNEL);
+ ep7312_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!ep7312_mtd) {
printk("Unable to allocate EDB7312 NAND MTD device structure.\n");
return -ENOMEM;
}
-
+
/* map physical adress */
- ep7312_fio_base = (unsigned long)ioremap(ep7312_fio_pbase, SZ_1K);
- if(!ep7312_fio_base) {
+ ep7312_fio_base = ioremap(ep7312_fio_pbase, SZ_1K);
+ if (!ep7312_fio_base) {
printk("ioremap EDB7312 NAND flash failed\n");
kfree(ep7312_mtd);
return -EIO;
}
-
+
/* Get pointer to private data */
- this = (struct nand_chip *) (&ep7312_mtd[1]);
-
+ this = (struct nand_chip *)(&ep7312_mtd[1]);
+
/* Initialize structures */
- memset((char *) ep7312_mtd, 0, sizeof(struct mtd_info));
- memset((char *) this, 0, sizeof(struct nand_chip));
-
+ memset(ep7312_mtd, 0, sizeof(struct mtd_info));
+ memset(this, 0, sizeof(struct nand_chip));
+
/* Link the private data with the MTD structure */
ep7312_mtd->priv = this;
-
+ ep7312_mtd->owner = THIS_MODULE;
+
/*
* Set GPIO Port B control register so that the pins are configured
* to be outputs for controlling the NAND flash.
*/
clps_writeb(0xf0, ep7312_pxddr);
-
+
/* insert callbacks */
this->IO_ADDR_R = ep7312_fio_base;
this->IO_ADDR_W = ep7312_fio_base;
- this->hwcontrol = ep7312_hwcontrol;
+ this->cmd_ctrl = ep7312_hwcontrol;
this->dev_ready = ep7312_device_ready;
/* 15 us command delay time */
this->chip_delay = 15;
-
+
/* Scan to find existence of the device */
- if (nand_scan (ep7312_mtd, 1)) {
+ if (nand_scan(ep7312_mtd, 1)) {
iounmap((void *)ep7312_fio_base);
- kfree (ep7312_mtd);
+ kfree(ep7312_mtd);
return -ENXIO;
}
-
- /* Allocate memory for internal data buffer */
- this->data_buf = kmalloc (sizeof(u_char) * (ep7312_mtd->oobblock + ep7312_mtd->oobsize), GFP_KERNEL);
- if (!this->data_buf) {
- printk("Unable to allocate NAND data buffer for EDB7312.\n");
- iounmap((void *)ep7312_fio_base);
- kfree (ep7312_mtd);
- return -ENOMEM;
- }
-
-#ifdef CONFIG_PARTITIONS
+#ifdef CONFIG_MTD_PARTITIONS
ep7312_mtd->name = "edb7312-nand";
- mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes,
- &mtd_parts, 0);
+ mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes, &mtd_parts, 0);
if (mtd_parts_nb > 0)
part_type = "command line";
else
mtd_parts_nb = NUM_PARTITIONS;
part_type = "static";
}
-
+
/* Register the partitions */
printk(KERN_NOTICE "Using %s partition definition\n", part_type);
add_mtd_partitions(ep7312_mtd, mtd_parts, mtd_parts_nb);
-
+
/* Return happy */
return 0;
}
+
module_init(ep7312_init);
/*
* Clean up routine
*/
-static void __exit ep7312_cleanup (void)
+static void __exit ep7312_cleanup(void)
{
- struct nand_chip *this = (struct nand_chip *) &ep7312_mtd[1];
-
- /* Unregister the device */
- del_mtd_device (ep7312_mtd);
-
- /* Free internal data buffer */
- kfree (this->data_buf);
-
+ struct nand_chip *this = (struct nand_chip *)&ep7312_mtd[1];
+
+ /* Release resources, unregister device */
+ nand_release(ap7312_mtd);
+
+ /* Release io resource */
+ iounmap(this->IO_ADDR_R);
+
/* Free the MTD device structure */
- kfree (ep7312_mtd);
+ kfree(ep7312_mtd);
}
+
module_exit(ep7312_cleanup);
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff