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authorKyungmin Park <kyungmin.park@samsung.com>2005-09-09 07:39:50 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-06 21:33:11 +0100
commit68ee4b1c50847743393b01847a640ebf1002789b (patch)
tree40b71c801678c3e71c9cd7c30127ff3f47fa653a /drivers/mtd/onenand
parente4c212efbdd4e286bc3defcddbab2c1e57ec75c3 (diff)
downloadop-kernel-dev-68ee4b1c50847743393b01847a640ebf1002789b.zip
op-kernel-dev-68ee4b1c50847743393b01847a640ebf1002789b.tar.gz
[MTD] OneNAND: Add generic platform driver
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/mtd/onenand')
-rw-r--r--drivers/mtd/onenand/Kconfig7
-rw-r--r--drivers/mtd/onenand/Makefile1
-rw-r--r--drivers/mtd/onenand/generic.c147
3 files changed, 155 insertions, 0 deletions
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig
index 08a32a5..666ad32 100644
--- a/drivers/mtd/onenand/Kconfig
+++ b/drivers/mtd/onenand/Kconfig
@@ -23,6 +23,13 @@ config MTD_ONENAND_VERIFY_WRITE
device thinks the write was successful, a bit could have been
flipped accidentaly due to device wear or something else.
+config MTD_ONENAND_GENERIC
+ tristate "OneNAND Flash device on generic board"
+ depends on MTD_ONENAND
+ help
+ Support for OneNAND flash on generic board. Using device driver
+ framework, now all most platfrom are support.
+
config MTD_ONENAND_OMAP
tristate "OneNAND Flash device on OMAP board"
depends on ARCH_OMAP && MTD_ONENAND
diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile
index 932301a..e2a9654 100644
--- a/drivers/mtd/onenand/Makefile
+++ b/drivers/mtd/onenand/Makefile
@@ -6,6 +6,7 @@
obj-$(CONFIG_MTD_ONENAND) += onenand.o
# Board specific.
+obj-$(CONFIG_MTD_ONENAND_GENERIC) += generic.o
obj-$(CONFIG_MTD_ONENAND_OMAP) += omap-onenand.o
# Simulator
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
new file mode 100644
index 0000000..48cce43
--- /dev/null
+++ b/drivers/mtd/onenand/generic.c
@@ -0,0 +1,147 @@
+/*
+ * linux/drivers/mtd/onenand/generic.c
+ *
+ * Copyright (c) 2005 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * 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 OneNAND flash for generic boards.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/mach/flash.h>
+
+#define DRIVER_NAME "onenand"
+
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "cmdlinepart", NULL, };
+#endif
+
+struct onenand_info {
+ struct mtd_info mtd;
+ struct mtd_partition *parts;
+ struct onenand_chip onenand;
+};
+
+static int __devinit generic_onenand_probe(struct device *dev)
+{
+ struct onenand_info *info;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct onenand_platform_data *pdata = pdev->dev.platform_data;
+ struct resource *res = pdev->resource;
+ unsigned long size = res->end - res->start + 1;
+ int err;
+
+ info = kmalloc(sizeof(struct onenand_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ memset(info, 0, sizeof(struct onenand_info));
+
+ if (!request_mem_region(res->start, size, dev->driver->name)) {
+ err = -EBUSY;
+ goto out_free_info;
+ }
+
+ info->onenand.base = ioremap(res->start, size);
+ if (!info->onenand.base) {
+ err = -ENOMEM;
+ goto out_release_mem_region;
+ }
+
+ info->onenand.mmcontrol = pdata->mmcontrol;
+
+ info->mtd.name = pdev->dev.bus_id;
+ info->mtd.priv = &info->onenand;
+ info->mtd.owner = THIS_MODULE;
+
+ if (onenand_scan(&info->mtd, 1)) {
+ err = -ENXIO;
+ goto out_iounmap;
+ }
+
+#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
+ err = add_mtd_device(&info->mtd);
+
+ dev_set_drvdata(&pdev->dev, info);
+
+ return 0;
+
+out_iounmap:
+ iounmap(info->onenand.base);
+out_release_mem_region:
+ release_mem_region(res->start, size);
+out_free_info:
+ kfree(info);
+
+ return err;
+}
+
+static int __devexit generic_onenand_remove(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct onenand_info *info = dev_get_drvdata(&pdev->dev);
+ struct resource *res = pdev->resource;
+ unsigned long size = res->end - res->start + 1;
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ if (info) {
+ if (info->parts)
+ del_mtd_partitions(&info->mtd);
+ else
+ del_mtd_device(&info->mtd);
+
+ onenand_release(&info->mtd);
+ release_mem_region(res->start, size);
+ iounmap(info->onenand.base);
+ kfree(info);
+ }
+
+ return 0;
+}
+
+static struct device_driver generic_onenand_driver = {
+ .name = DRIVER_NAME,
+ .bus = &platform_bus_type,
+ .probe = generic_onenand_probe,
+ .remove = __devexit_p(generic_onenand_remove),
+};
+
+MODULE_ALIAS(DRIVER_NAME);
+
+static int __init generic_onenand_init(void)
+{
+ return driver_register(&generic_onenand_driver);
+}
+
+static void __exit generic_onenand_exit(void)
+{
+ driver_unregister(&generic_onenand_driver);
+}
+
+module_init(generic_onenand_init);
+module_exit(generic_onenand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
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