Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 186 insertions, 0 deletions

diff --git a/drivers/mtd/nand/h1910.c b/drivers/mtd/nand/h1910.c
new file mode 100644
index 0000000..f8ce79b
--- /dev/null
+++ b/drivers/mtd/nand/h1910.c
@@ -0,0 +1,186 @@
+/*
+ *  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)
+ *
+ * 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 <mach/hardware.h>	/* for CLPS7111_VIRT_BASE */
+#include <asm/sizes.h>
+#include <mach/h1900-gpio.h>
+#include <mach/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
+ *
+ *	NAND_NCE: bit 0 - don't care
+ *	NAND_CLE: bit 1 - address bit 2
+ *	NAND_ALE: bit 2 - address bit 3
+ */
+static void h1910_hwcontrol(struct mtd_info *mtd, int cmd,
+			    unsigned int ctrl)
+{
+	struct nand_chip *chip = mtd->priv;
+
+	if (cmd != NAND_CMD_NONE)
+		writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1));
+}
+
+/*
+ *	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);
+	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(h1910_nand_mtd, 0, sizeof(struct mtd_info));
+	memset(this, 0, sizeof(struct nand_chip));
+
+	/* Link the private data with the MTD structure */
+	h1910_nand_mtd->priv = this;
+	h1910_nand_mtd->owner = THIS_MODULE;
+
+	/*
+	 * Enable VPEN
+	 */
+	GPSR(37) = GPIO_bit(37);
+
+	/* insert callbacks */
+	this->IO_ADDR_R = nandaddr;
+	this->IO_ADDR_W = nandaddr;
+	this->cmd_ctrl = 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->ecc.mode = 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");