mtd/drivers/mtd/nand h1910.c, NONE, 1.1 Kconfig, 1.17,
1.18 Makefile.common, 1.9, 1.10
joshua at infradead.org
joshua at infradead.org
Mon Aug 23 09:57:50 EDT 2004
Update of /home/cvs/mtd/drivers/mtd/nand
In directory phoenix.infradead.org:/tmp/cvs-serv17076
Modified Files:
Kconfig Makefile.common
Added Files:
h1910.c
Log Message:
Added h1910 support
--- NEW FILE h1910.c ---
/*
* drivers/mtd/nand/h1910.c
*
* Copyright (C) 2003 Joshua Wise (joshua at joshuawise.com)
*
* Derived from drivers/mtd/nand/edb7312.c
* Copyright (C) 2002 Marius Gröger (mag at sysgo.de)
* Copyright (c) 2001 Thomas Gleixner (gleixner at 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 <asm/arch/hardware.h> /* for CLPS7111_VIRT_BASE */
#include <asm/sizes.h>
#include <asm/arch/h1900-gpio.h>
#include <asm/arch/ipaq.h>
/*
* MTD structure for EDB7312 board
*/
static struct mtd_info *h1910_nand_mtd = NULL;
/*
* Module stuff
*/
#ifdef CONFIG_MTD_PARTITIONS
/*
* 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
#endif
/*
* hardware specific access to control-lines
*/
static void h1910_hwcontrol(struct mtd_info *mtd, int cmd)
{
struct nand_chip* this = (struct nand_chip *) (mtd->priv);
switch(cmd) {
case NAND_CTL_SETCLE:
this->IO_ADDR_R |= (1 << 2);
this->IO_ADDR_W |= (1 << 2);
break;
case NAND_CTL_CLRCLE:
this->IO_ADDR_R &= ~(1 << 2);
this->IO_ADDR_W &= ~(1 << 2);
break;
case NAND_CTL_SETALE:
this->IO_ADDR_R |= (1 << 3);
this->IO_ADDR_W |= (1 << 3);
break;
case NAND_CTL_CLRALE:
this->IO_ADDR_R &= ~(1 << 3);
this->IO_ADDR_W &= ~(1 << 3);
break;
case NAND_CTL_SETNCE:
break;
case NAND_CTL_CLRNCE:
break;
}
}
/*
* 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;
const char *part_type = 0;
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = 0;
void* nandaddr;
if (!machine_is_h1900())
return -ENODEV;
nandaddr = __ioremap(0x08000000, 0x1000, 0, 1);
if (!nandaddr)
{
printk("Failed to ioremap in 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");
return -ENOMEM;
}
/* Get pointer to private data */
this = (struct nand_chip *) (&h1910_nand_mtd[1]);
/* Initialize structures */
memset((char *) h1910_nand_mtd, 0, sizeof(struct mtd_info));
memset((char *) this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
h1910_nand_mtd->priv = this;
/*
* Enable VPEN
*/
GPSR(37) = GPIO_bit(37);
/* insert callbacks */
this->IO_ADDR_R = (unsigned long)nandaddr;
this->IO_ADDR_W = (unsigned long)nandaddr;
this->hwcontrol = 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->eccmode = NAND_ECC_SOFT;
this->options = NAND_NO_AUTOINCR;
/* 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);
return -ENXIO;
}
/* Allocate memory for internal data buffer */
this->data_buf = kmalloc (sizeof(u_char) * (h1910_nand_mtd->oobblock + h1910_nand_mtd->oobsize), GFP_KERNEL);
if (!this->data_buf) {
printk("Unable to allocate NAND data buffer for h1910.\n");
kfree (h1910_nand_mtd);
return -ENOMEM;
}
#ifdef CONFIG_MTD_CMDLINE_PARTS
mtd_parts_nb = parse_cmdline_partitions(h1910_nand_mtd, &mtd_parts,
"h1910-nand");
if (mtd_parts_nb > 0)
part_type = "command line";
else
mtd_parts_nb = 0;
#endif
if (mtd_parts_nb == 0)
{
mtd_parts = partition_info;
mtd_parts_nb = NUM_PARTITIONS;
part_type = "static";
}
/* Register the partitions */
printk(KERN_NOTICE "Using %s partition definition\n", part_type);
add_mtd_partitions(h1910_nand_mtd, mtd_parts, mtd_parts_nb);
/* 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];
/* Unregister the device */
del_mtd_device (h1910_nand_mtd);
/* Free internal data buffer */
kfree (this->data_buf);
/* 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");
Index: Kconfig
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/nand/Kconfig,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -r1.17 -r1.18
--- Kconfig 10 Aug 2004 14:24:07 -0000 1.17
+++ Kconfig 23 Aug 2004 13:57:47 -0000 1.18
@@ -36,6 +36,12 @@
This enables the driver for the Cirrus Logic EBD7312 evaluation
board to access the onboard NAND Flash.
+config MTD_NAND_H1900
+ tristate "iPAQ H1900 flash"
+ depends on ARM && MTD_NAND && ARCH_PXA && MTD_PARTITIONS
+ help
+ This enables the driver for the iPAQ h1900 flash.
+
config MTD_NAND_SPIA
tristate "NAND Flash device on SPIA board"
depends on ARM && ARCH_P720T && MTD_NAND
Index: Makefile.common
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/nand/Makefile.common,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- Makefile.common 12 Jul 2004 16:07:31 -0000 1.9
+++ Makefile.common 23 Aug 2004 13:57:48 -0000 1.10
@@ -15,5 +15,6 @@
obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB) += ppchameleonevb.o
obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
+obj-$(CONFIG_MTD_NAND_H1900) += h1910.o
nand-objs = nand_base.o nand_bbt.o
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