1 files changed, 178 insertions, 0 deletions

diff --git a/drivers/mtd/onenand/omap-onenand.c b/drivers/mtd/onenand/omap-onenand.c
new file mode 100644
index 000000000000..56e1aec6b835
--- /dev/null
+++ b/drivers/mtd/onenand/omap-onenand.c
@@ -0,0 +1,178 @@
+/*
+ *  linux/drivers/mtd/onenand/omap-onenand.c
+ *
+ *  Copyright (c) 2005 Samsung Electronics
+ *  Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ *  Derived from linux/drivers/mtd/nand/omap-nand-flash.c
+ *
+ * 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 device for TI OMAP boards.
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/tc.h>
+#include <asm/sizes.h>
+
+#define OMAP_ONENAND_FLASH_START1       OMAP_CS2A_PHYS
+#define OMAP_ONENAND_FLASH_START2       OMAP_CS0_PHYS
+/*
+ * MTD structure for OMAP board
+ */
+static struct mtd_info *omap_onenand_mtd = NULL;
+
+/*
+ * Define partitions for flash devices
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+static struct mtd_partition static_partition[] = {
+        {
+                .name           = "X-Loader + U-Boot",
+                .offset         = 0,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE /* force read-only */
+        },
+        {
+                .name           = "U-Boot Environment",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE /* force read-only */
+        },
+        {
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 2 * SZ_1M
+        },
+        {
+                .name           = "filesystem0",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_16M,
+        },
+        {
+                .name           = "filesystem1",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+        },
+};
+
+const char *part_probes[] = { "cmdlinepart", NULL,  };
+
+#endif
+
+/* Scan to find existance of the device at base.
+   This also allocates oob and data internal buffers */
+static char onenand_name[] = "onenand";
+
+/*
+ * Main initialization routine
+ */
+static int __init omap_onenand_init (void)
+{
+        struct onenand_chip *this;
+        struct mtd_partition *dynamic_partition = 0;
+        int err = 0;
+
+        /* Allocate memory for MTD device structure and private data */
+        omap_onenand_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct onenand_chip),
+                                GFP_KERNEL);
+        if (!omap_onenand_mtd) {
+                printk (KERN_WARNING "Unable to allocate OneNAND MTD device structure.\n");
+                err = -ENOMEM;
+                goto out;
+        }
+
+        /* Get pointer to private data */
+        this = (struct onenand_chip *) (&omap_onenand_mtd[1]);
+
+        /* Initialize structures */
+        memset((char *) omap_onenand_mtd, 0, sizeof(struct mtd_info) + sizeof(struct onenand_chip));
+
+        /* Link the private data with the MTD structure */
+        omap_onenand_mtd->priv = this;
+
+        /* try the first address */
+        this->base = ioremap(OMAP_ONENAND_FLASH_START1, SZ_128K);
+        omap_onenand_mtd->name = onenand_name;
+        if (onenand_scan(omap_onenand_mtd, 1)){
+                /* try the second address */
+                iounmap(this->base);
+                this->base = ioremap(OMAP_ONENAND_FLASH_START2, SZ_128K);
+                if (onenand_scan(omap_onenand_mtd, 1)) {
+                        iounmap(this->base);
+                        err = -ENXIO;
+                        goto out_mtd;
+                }
+        }
+
+        /* Register the partitions */
+        switch (omap_onenand_mtd->size) {
+        case SZ_128M:
+        case SZ_64M:
+        case SZ_32M:
+#ifdef CONFIG_MTD_PARTITIONS
+                err = parse_mtd_partitions(omap_onenand_mtd, part_probes,
+                                        &dynamic_partition, 0);
+                if (err > 0)
+                        err = add_mtd_partitions(omap_onenand_mtd,
+                                        dynamic_partition, err);
+                else if (1)
+                        err = add_mtd_partitions(omap_onenand_mtd,
+                                        static_partition,
+                                        ARRAY_SIZE(static_partition));
+                else
+#endif
+                        err = add_mtd_device(omap_onenand_mtd);
+                if (err)
+                        goto out_buf;
+                break;
+
+        default:
+                printk(KERN_WARNING "Unsupported OneNAND device\n");
+                err = -ENXIO;
+                goto out_buf;
+        }
+
+        return 0;
+
+out_buf:
+        onenand_release(omap_onenand_mtd);
+        iounmap(this->base);
+out_mtd:
+        kfree(omap_onenand_mtd);
+out:
+        return err;
+}
+
+/*
+ * Clean up routine
+ */
+static void __exit omap_onenand_cleanup (void)
+{
+        struct onenand_chip *this = omap_onenand_mtd->priv;
+
+        /* onenand_release frees MTD partitions, MTD structure
+           and onenand internal buffers */
+        onenand_release(omap_onenand_mtd);
+        iounmap(this->base);
+        kfree(omap_onenand_mtd);
+}
+
+module_init(omap_onenand_init);
+module_exit(omap_onenand_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_DESCRIPTION("Glue layer for OneNAND flash on OMAP boards");