[MTD] NOR flash map driver for TI OMAP boards.

From: David Brownell, Jian Zhang <jzhang@ti.com>, Tony Lindgren
<tony@atomide.com> and others.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/mtd/maps/omap_nor.c b/drivers/mtd/maps/omap_nor.c
new file mode 100644
index 0000000..8cc7140
--- /dev/null
+++ b/drivers/mtd/maps/omap_nor.c
@@ -0,0 +1,179 @@
+/*
+ * Flash memory support for various TI OMAP boards
+ *
+ * Copyright (C) 2001-2002 MontaVista Software Inc.
+ * Copyright (C) 2003-2004 Texas Instruments
+ * Copyright (C) 2004 Nokia Corporation 
+ *
+ *	Assembled using driver code copyright the companies above
+ *	and written by David Brownell, Jian Zhang <jzhang@ti.com>,
+ * 	Tony Lindgren <tony@atomide.com> and others.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the  GNU General Public License along
+ * with this program; if not, write  to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/mach/flash.h>
+#include <asm/arch/tc.h>
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL };
+#endif
+
+struct omapflash_info {
+	struct mtd_partition	*parts;
+	struct mtd_info		*mtd;
+	struct map_info		map;
+};
+
+static void omap_set_vpp(struct map_info *map, int enable)
+{
+	static int	count;
+
+	if (enable) {
+		if (count++ == 0)
+			OMAP_EMIFS_CONFIG_REG |= OMAP_EMIFS_CONFIG_WP;
+	} else {
+		if (count && (--count == 0))
+			OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP;
+	}
+}
+
+static int __devinit omapflash_probe(struct device *dev)
+{
+	int err;
+	struct omapflash_info *info;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct flash_platform_data *pdata = pdev->dev.platform_data;
+	struct resource *res = pdev->resource;
+	unsigned long size = res->end - res->start + 1;
+
+	info = kmalloc(sizeof(struct omapflash_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	memset(info, 0, sizeof(struct omapflash_info));
+
+	if (!request_mem_region(res->start, size, "flash")) {
+		err = -EBUSY;
+		goto out_free_info;
+	}
+
+	info->map.virt		= ioremap(res->start, size);
+	if (!info->map.virt) {
+		err = -ENOMEM;
+		goto out_release_mem_region;
+	}
+	info->map.name		= pdev->dev.bus_id;
+	info->map.phys		= res->start;
+	info->map.size		= size;
+	info->map.bankwidth	= pdata->width;
+	info->map.set_vpp	= omap_set_vpp;
+
+	simple_map_init(&info->map);
+	info->mtd = do_map_probe(pdata->map_name, &info->map);
+	if (!info->mtd) {
+		err = -EIO;
+		goto out_iounmap;
+	}
+	info->mtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+	err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
+	if (err > 0)
+		add_mtd_partitions(info->mtd, info->parts, err);
+	else if (err < 0 && pdata->parts)
+		add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
+	else
+#endif
+		add_mtd_device(info->mtd);
+
+	dev_set_drvdata(&pdev->dev, info);
+
+	return 0;
+
+out_iounmap:
+	iounmap(info->map.virt);
+out_release_mem_region:
+	release_mem_region(res->start, size);
+out_free_info:
+	kfree(info);
+
+	return err;
+}
+
+static int __devexit omapflash_remove(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct omapflash_info *info = dev_get_drvdata(&pdev->dev);
+
+	dev_set_drvdata(&pdev->dev, NULL);
+
+	if (info) {
+		if (info->parts) {
+			del_mtd_partitions(info->mtd);
+			kfree(info->parts);
+		} else
+			del_mtd_device(info->mtd);
+		map_destroy(info->mtd);
+		release_mem_region(info->map.phys, info->map.size);
+		iounmap((void __iomem *) info->map.virt);
+		kfree(info);
+	}
+
+	return 0;
+}
+
+static struct device_driver omapflash_driver = {
+	.name	= "omapflash",
+	.bus	= &platform_bus_type,
+	.probe	= omapflash_probe,
+	.remove	= __devexit_p(omapflash_remove),
+};
+
+static int __init omapflash_init(void)
+{
+	return driver_register(&omapflash_driver);
+}
+
+static void __exit omapflash_exit(void)
+{
+	driver_unregister(&omapflash_driver);
+}
+
+module_init(omapflash_init);
+module_exit(omapflash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");
+