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/platform_device.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/onenand.h>
20 #include <linux/mtd/partitions.h>
23 #include <asm/mach/flash.h>
25 #define DRIVER_NAME "onenand"
28 #ifdef CONFIG_MTD_PARTITIONS
29 static const char *part_probes
[] = { "cmdlinepart", NULL
, };
34 struct mtd_partition
*parts
;
35 struct onenand_chip onenand
;
38 static int __devinit
generic_onenand_probe(struct device
*dev
)
40 struct onenand_info
*info
;
41 struct platform_device
*pdev
= to_platform_device(dev
);
42 struct flash_platform_data
*pdata
= pdev
->dev
.platform_data
;
43 struct resource
*res
= pdev
->resource
;
44 unsigned long size
= res
->end
- res
->start
+ 1;
47 info
= kmalloc(sizeof(struct onenand_info
), GFP_KERNEL
);
51 memset(info
, 0, sizeof(struct onenand_info
));
53 if (!request_mem_region(res
->start
, size
, dev
->driver
->name
)) {
58 info
->onenand
.base
= ioremap(res
->start
, size
);
59 if (!info
->onenand
.base
) {
61 goto out_release_mem_region
;
64 info
->onenand
.mmcontrol
= pdata
->mmcontrol
;
66 info
->mtd
.name
= pdev
->dev
.bus_id
;
67 info
->mtd
.priv
= &info
->onenand
;
68 info
->mtd
.owner
= THIS_MODULE
;
70 if (onenand_scan(&info
->mtd
, 1)) {
75 #ifdef CONFIG_MTD_PARTITIONS
76 err
= parse_mtd_partitions(&info
->mtd
, part_probes
, &info
->parts
, 0);
78 add_mtd_partitions(&info
->mtd
, info
->parts
, err
);
79 else if (err
< 0 && pdata
->parts
)
80 add_mtd_partitions(&info
->mtd
, pdata
->parts
, pdata
->nr_parts
);
83 err
= add_mtd_device(&info
->mtd
);
85 dev_set_drvdata(&pdev
->dev
, info
);
90 iounmap(info
->onenand
.base
);
91 out_release_mem_region
:
92 release_mem_region(res
->start
, size
);
99 static int __devexit
generic_onenand_remove(struct device
*dev
)
101 struct platform_device
*pdev
= to_platform_device(dev
);
102 struct onenand_info
*info
= dev_get_drvdata(&pdev
->dev
);
103 struct resource
*res
= pdev
->resource
;
104 unsigned long size
= res
->end
- res
->start
+ 1;
106 dev_set_drvdata(&pdev
->dev
, NULL
);
110 del_mtd_partitions(&info
->mtd
);
112 del_mtd_device(&info
->mtd
);
114 onenand_release(&info
->mtd
);
115 release_mem_region(res
->start
, size
);
116 iounmap(info
->onenand
.base
);
123 static struct device_driver generic_onenand_driver
= {
125 .bus
= &platform_bus_type
,
126 .probe
= generic_onenand_probe
,
127 .remove
= __devexit_p(generic_onenand_remove
),
130 MODULE_ALIAS(DRIVER_NAME
);
132 static int __init
generic_onenand_init(void)
134 return driver_register(&generic_onenand_driver
);
137 static void __exit
generic_onenand_exit(void)
139 driver_unregister(&generic_onenand_driver
);
142 module_init(generic_onenand_init
);
143 module_exit(generic_onenand_exit
);
145 MODULE_LICENSE("GPL");
146 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
147 MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");