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68ee4b1c KP |
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 | ||
68ee4b1c | 15 | #include <linux/module.h> |
de25968c | 16 | #include <linux/slab.h> |
27f4e083 | 17 | #include <linux/platform_device.h> |
68ee4b1c KP |
18 | #include <linux/mtd/mtd.h> |
19 | #include <linux/mtd/onenand.h> | |
20 | #include <linux/mtd/partitions.h> | |
2584cf83 | 21 | #include <linux/io.h> |
68ee4b1c | 22 | |
778dbcc1 MD |
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" | |
68ee4b1c | 31 | |
68ee4b1c KP |
32 | struct onenand_info { |
33 | struct mtd_info mtd; | |
68ee4b1c KP |
34 | struct onenand_chip onenand; |
35 | }; | |
36 | ||
06f25510 | 37 | static int generic_onenand_probe(struct platform_device *pdev) |
68ee4b1c KP |
38 | { |
39 | struct onenand_info *info; | |
e09f7f99 | 40 | struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev); |
68ee4b1c | 41 | struct resource *res = pdev->resource; |
778dbcc1 | 42 | unsigned long size = resource_size(res); |
68ee4b1c KP |
43 | int err; |
44 | ||
95b93a0c | 45 | info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL); |
68ee4b1c KP |
46 | if (!info) |
47 | return -ENOMEM; | |
48 | ||
778dbcc1 | 49 | if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) { |
68ee4b1c KP |
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 | ||
8b3ae733 | 60 | info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL; |
2c22120f | 61 | info->onenand.irq = platform_get_irq(pdev, 0); |
68ee4b1c | 62 | |
fe003bc8 | 63 | info->mtd.dev.parent = &pdev->dev; |
68ee4b1c | 64 | info->mtd.priv = &info->onenand; |
68ee4b1c KP |
65 | |
66 | if (onenand_scan(&info->mtd, 1)) { | |
67 | err = -ENXIO; | |
68 | goto out_iounmap; | |
69 | } | |
70 | ||
42d7fbe2 AB |
71 | err = mtd_device_parse_register(&info->mtd, NULL, NULL, |
72 | pdata ? pdata->parts : NULL, | |
73 | pdata ? pdata->nr_parts : 0); | |
68ee4b1c | 74 | |
7a192ec3 | 75 | platform_set_drvdata(pdev, info); |
68ee4b1c KP |
76 | |
77 | return 0; | |
78 | ||
79 | out_iounmap: | |
80 | iounmap(info->onenand.base); | |
81 | out_release_mem_region: | |
82 | release_mem_region(res->start, size); | |
83 | out_free_info: | |
84 | kfree(info); | |
85 | ||
86 | return err; | |
87 | } | |
88 | ||
810b7e06 | 89 | static int generic_onenand_remove(struct platform_device *pdev) |
68ee4b1c | 90 | { |
7a192ec3 | 91 | struct onenand_info *info = platform_get_drvdata(pdev); |
68ee4b1c | 92 | struct resource *res = pdev->resource; |
778dbcc1 | 93 | unsigned long size = resource_size(res); |
68ee4b1c | 94 | |
68ee4b1c | 95 | if (info) { |
68ee4b1c KP |
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 | ||
7a192ec3 ML |
105 | static struct platform_driver generic_onenand_driver = { |
106 | .driver = { | |
107 | .name = DRIVER_NAME, | |
7a192ec3 | 108 | }, |
68ee4b1c | 109 | .probe = generic_onenand_probe, |
5153b88c | 110 | .remove = generic_onenand_remove, |
68ee4b1c KP |
111 | }; |
112 | ||
f99640de | 113 | module_platform_driver(generic_onenand_driver); |
68ee4b1c KP |
114 | |
115 | MODULE_LICENSE("GPL"); | |
116 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
117 | MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards"); | |
f99640de | 118 | MODULE_ALIAS("platform:" DRIVER_NAME); |