2 * linux/drivers/mtd/onenand/generic.c
4 * Copyright (c) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 * This is a device driver for the OneNAND flash for generic boards.
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/platform_device.h>
19 #include <linux/mtd/mtd.h>
20 #include <linux/mtd/onenand.h>
21 #include <linux/mtd/partitions.h>
25 * Note: Driver name and platform data format have been updated!
27 * This version of the driver is named "onenand-flash" and takes struct
28 * onenand_platform_data as platform data. The old ARM-specific version
29 * with the name "onenand" used to take struct flash_platform_data.
31 #define DRIVER_NAME "onenand-flash"
35 struct onenand_chip onenand;
38 static int generic_onenand_probe(struct platform_device *pdev)
40 struct onenand_info *info;
41 struct onenand_platform_data *pdata = pdev->dev.platform_data;
42 struct resource *res = pdev->resource;
43 unsigned long size = resource_size(res);
46 info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
50 if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
55 info->onenand.base = ioremap(res->start, size);
56 if (!info->onenand.base) {
58 goto out_release_mem_region;
61 info->onenand.mmcontrol = pdata ? pdata->mmcontrol : 0;
62 info->onenand.irq = platform_get_irq(pdev, 0);
64 info->mtd.name = dev_name(&pdev->dev);
65 info->mtd.priv = &info->onenand;
66 info->mtd.owner = THIS_MODULE;
68 if (onenand_scan(&info->mtd, 1)) {
73 err = mtd_device_parse_register(&info->mtd, NULL, NULL,
74 pdata ? pdata->parts : NULL,
75 pdata ? pdata->nr_parts : 0);
77 platform_set_drvdata(pdev, info);
82 iounmap(info->onenand.base);
83 out_release_mem_region:
84 release_mem_region(res->start, size);
91 static int generic_onenand_remove(struct platform_device *pdev)
93 struct onenand_info *info = platform_get_drvdata(pdev);
94 struct resource *res = pdev->resource;
95 unsigned long size = resource_size(res);
97 platform_set_drvdata(pdev, NULL);
100 onenand_release(&info->mtd);
101 release_mem_region(res->start, size);
102 iounmap(info->onenand.base);
109 static struct platform_driver generic_onenand_driver = {
112 .owner = THIS_MODULE,
114 .probe = generic_onenand_probe,
115 .remove = generic_onenand_remove,
118 module_platform_driver(generic_onenand_driver);
120 MODULE_LICENSE("GPL");
121 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
122 MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
123 MODULE_ALIAS("platform:" DRIVER_NAME);