--- /dev/null
+/*
+ * 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)
+ *
+ * $Id: h1910.c,v 1.5 2004/11/04 12:53:10 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
+ * 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 __iomem *nandaddr;
+
+ if (!machine_is_h1900())
+ return -ENODEV;
+
+ nandaddr = __ioremap(0x08000000, 0x1000, 0, 1);
+ 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((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 = nandaddr;
+ this->IO_ADDR_W = 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);
+ iounmap ((void *) nandaddr);
+ return -ENXIO;
+ }
+
+#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];
+
+ /* 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");
git://git.onelab.eu / linux-2.6.git / blobdiff