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1/*
2 * linux/drivers/mtd/onenand/generic.c
3 *
4 * Copyright (c) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 *
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.
10 *
11 * Overview:
12 * This is a device driver for the OneNAND flash for generic boards.
13 */
14
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>
22#include <asm/io.h>
23
24/*
25 * Note: Driver name and platform data format have been updated!
26 *
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.
30 */
31#define DRIVER_NAME "onenand-flash"
32
33static const char *part_probes[] = { "cmdlinepart", NULL, };
34
35struct onenand_info {
36 struct mtd_info mtd;
37 struct mtd_partition *parts;
38 struct onenand_chip onenand;
39};
40
41static int __devinit generic_onenand_probe(struct platform_device *pdev)
42{
43 struct onenand_info *info;
44 struct onenand_platform_data *pdata = pdev->dev.platform_data;
45 struct resource *res = pdev->resource;
46 unsigned long size = resource_size(res);
47 int err;
48
49 info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
50 if (!info)
51 return -ENOMEM;
52
53 if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
54 err = -EBUSY;
55 goto out_free_info;
56 }
57
58 info->onenand.base = ioremap(res->start, size);
59 if (!info->onenand.base) {
60 err = -ENOMEM;
61 goto out_release_mem_region;
62 }
63
64 info->onenand.mmcontrol = pdata ? pdata->mmcontrol : 0;
65 info->onenand.irq = platform_get_irq(pdev, 0);
66
67 info->mtd.name = dev_name(&pdev->dev);
68 info->mtd.priv = &info->onenand;
69 info->mtd.owner = THIS_MODULE;
70
71 if (onenand_scan(&info->mtd, 1)) {
72 err = -ENXIO;
73 goto out_iounmap;
74 }
75
76 err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
77 if (err > 0)
78 mtd_device_register(&info->mtd, info->parts, err);
79 else if (err <= 0 && pdata && pdata->parts)
80 mtd_device_register(&info->mtd, pdata->parts, pdata->nr_parts);
81 else
82 err = mtd_device_register(&info->mtd, NULL, 0);
83
84 platform_set_drvdata(pdev, info);
85
86 return 0;
87
88out_iounmap:
89 iounmap(info->onenand.base);
90out_release_mem_region:
91 release_mem_region(res->start, size);
92out_free_info:
93 kfree(info);
94
95 return err;
96}
97
98static int __devexit generic_onenand_remove(struct platform_device *pdev)
99{
100 struct onenand_info *info = platform_get_drvdata(pdev);
101 struct resource *res = pdev->resource;
102 unsigned long size = resource_size(res);
103
104 platform_set_drvdata(pdev, NULL);
105
106 if (info) {
107 mtd_device_unregister(&info->mtd);
108 onenand_release(&info->mtd);
109 release_mem_region(res->start, size);
110 iounmap(info->onenand.base);
111 kfree(info);
112 }
113
114 return 0;
115}
116
117static struct platform_driver generic_onenand_driver = {
118 .driver = {
119 .name = DRIVER_NAME,
120 .owner = THIS_MODULE,
121 },
122 .probe = generic_onenand_probe,
123 .remove = __devexit_p(generic_onenand_remove),
124};
125
126MODULE_ALIAS("platform:" DRIVER_NAME);
127
128static int __init generic_onenand_init(void)
129{
130 return platform_driver_register(&generic_onenand_driver);
131}
132
133static void __exit generic_onenand_exit(void)
134{
135 platform_driver_unregister(&generic_onenand_driver);
136}
137
138module_init(generic_onenand_init);
139module_exit(generic_onenand_exit);
140
141MODULE_LICENSE("GPL");
142MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
143MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
1/*
2 * linux/drivers/mtd/onenand/generic.c
3 *
4 * Copyright (c) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 *
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.
10 *
11 * Overview:
12 * This is a device driver for the OneNAND flash for generic boards.
13 */
14
15#include <linux/module.h>
16#include <linux/slab.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>
21#include <linux/io.h>
22
23/*
24 * Note: Driver name and platform data format have been updated!
25 *
26 * This version of the driver is named "onenand-flash" and takes struct
27 * onenand_platform_data as platform data. The old ARM-specific version
28 * with the name "onenand" used to take struct flash_platform_data.
29 */
30#define DRIVER_NAME "onenand-flash"
31
32struct onenand_info {
33 struct mtd_info mtd;
34 struct onenand_chip onenand;
35};
36
37static int generic_onenand_probe(struct platform_device *pdev)
38{
39 struct onenand_info *info;
40 struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
41 struct resource *res = pdev->resource;
42 unsigned long size = resource_size(res);
43 int err;
44
45 info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
46 if (!info)
47 return -ENOMEM;
48
49 if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
50 err = -EBUSY;
51 goto out_free_info;
52 }
53
54 info->onenand.base = ioremap(res->start, size);
55 if (!info->onenand.base) {
56 err = -ENOMEM;
57 goto out_release_mem_region;
58 }
59
60 info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
61 info->onenand.irq = platform_get_irq(pdev, 0);
62
63 info->mtd.dev.parent = &pdev->dev;
64 info->mtd.priv = &info->onenand;
65
66 if (onenand_scan(&info->mtd, 1)) {
67 err = -ENXIO;
68 goto out_iounmap;
69 }
70
71 err = mtd_device_parse_register(&info->mtd, NULL, NULL,
72 pdata ? pdata->parts : NULL,
73 pdata ? pdata->nr_parts : 0);
74
75 platform_set_drvdata(pdev, info);
76
77 return 0;
78
79out_iounmap:
80 iounmap(info->onenand.base);
81out_release_mem_region:
82 release_mem_region(res->start, size);
83out_free_info:
84 kfree(info);
85
86 return err;
87}
88
89static int generic_onenand_remove(struct platform_device *pdev)
90{
91 struct onenand_info *info = platform_get_drvdata(pdev);
92 struct resource *res = pdev->resource;
93 unsigned long size = resource_size(res);
94
95 if (info) {
96 onenand_release(&info->mtd);
97 release_mem_region(res->start, size);
98 iounmap(info->onenand.base);
99 kfree(info);
100 }
101
102 return 0;
103}
104
105static struct platform_driver generic_onenand_driver = {
106 .driver = {
107 .name = DRIVER_NAME,
108 },
109 .probe = generic_onenand_probe,
110 .remove = generic_onenand_remove,
111};
112
113module_platform_driver(generic_onenand_driver);
114
115MODULE_LICENSE("GPL");
116MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
117MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
118MODULE_ALIAS("platform:" DRIVER_NAME);