summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/nand/onenand/generic.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/nand/onenand/generic.c')
-rw-r--r--drivers/mtd/nand/onenand/generic.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/mtd/nand/onenand/generic.c b/drivers/mtd/nand/onenand/generic.c
new file mode 100644
index 0000000000..4e7de48f07
--- /dev/null
+++ b/drivers/mtd/nand/onenand/generic.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2005 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * Overview:
+ * This is a device driver for the OneNAND flash for generic boards.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/onenand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+
+/*
+ * Note: Driver name and platform data format have been updated!
+ *
+ * This version of the driver is named "onenand-flash" and takes struct
+ * onenand_platform_data as platform data. The old ARM-specific version
+ * with the name "onenand" used to take struct flash_platform_data.
+ */
+#define DRIVER_NAME "onenand-flash"
+
+struct onenand_info {
+ struct mtd_info mtd;
+ struct onenand_chip onenand;
+};
+
+static int generic_onenand_probe(struct platform_device *pdev)
+{
+ struct onenand_info *info;
+ struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct resource *res = pdev->resource;
+ unsigned long size = resource_size(res);
+ int err;
+
+ info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
+ 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 ? pdata->mmcontrol : NULL;
+
+ err = platform_get_irq(pdev, 0);
+ if (err < 0)
+ goto out_iounmap;
+
+ info->onenand.irq = err;
+
+ info->mtd.dev.parent = &pdev->dev;
+ info->mtd.priv = &info->onenand;
+
+ if (onenand_scan(&info->mtd, 1)) {
+ err = -ENXIO;
+ goto out_iounmap;
+ }
+
+ err = mtd_device_register(&info->mtd, pdata ? pdata->parts : NULL,
+ pdata ? pdata->nr_parts : 0);
+
+ platform_set_drvdata(pdev, 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 void generic_onenand_remove(struct platform_device *pdev)
+{
+ struct onenand_info *info = platform_get_drvdata(pdev);
+ struct resource *res = pdev->resource;
+ unsigned long size = resource_size(res);
+
+ if (info) {
+ onenand_release(&info->mtd);
+ release_mem_region(res->start, size);
+ iounmap(info->onenand.base);
+ kfree(info);
+ }
+}
+
+static struct platform_driver generic_onenand_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .probe = generic_onenand_probe,
+ .remove_new = generic_onenand_remove,
+};
+
+module_platform_driver(generic_onenand_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
+MODULE_ALIAS("platform:" DRIVER_NAME);