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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 KP |
15 | #include <linux/module.h> |
16 | #include <linux/init.h> | |
de25968c | 17 | #include <linux/slab.h> |
27f4e083 | 18 | #include <linux/platform_device.h> |
68ee4b1c KP |
19 | #include <linux/mtd/mtd.h> |
20 | #include <linux/mtd/onenand.h> | |
21 | #include <linux/mtd/partitions.h> | |
68ee4b1c | 22 | #include <asm/io.h> |
68ee4b1c | 23 | |
778dbcc1 MD |
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" | |
68ee4b1c | 32 | |
68ee4b1c KP |
33 | struct onenand_info { |
34 | struct mtd_info mtd; | |
68ee4b1c KP |
35 | struct onenand_chip onenand; |
36 | }; | |
37 | ||
7a192ec3 | 38 | static int __devinit generic_onenand_probe(struct platform_device *pdev) |
68ee4b1c KP |
39 | { |
40 | struct onenand_info *info; | |
778dbcc1 | 41 | struct onenand_platform_data *pdata = pdev->dev.platform_data; |
68ee4b1c | 42 | struct resource *res = pdev->resource; |
778dbcc1 | 43 | unsigned long size = resource_size(res); |
68ee4b1c KP |
44 | int err; |
45 | ||
95b93a0c | 46 | info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL); |
68ee4b1c KP |
47 | if (!info) |
48 | return -ENOMEM; | |
49 | ||
778dbcc1 | 50 | if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) { |
68ee4b1c KP |
51 | err = -EBUSY; |
52 | goto out_free_info; | |
53 | } | |
54 | ||
55 | info->onenand.base = ioremap(res->start, size); | |
56 | if (!info->onenand.base) { | |
57 | err = -ENOMEM; | |
58 | goto out_release_mem_region; | |
59 | } | |
60 | ||
778dbcc1 | 61 | info->onenand.mmcontrol = pdata ? pdata->mmcontrol : 0; |
2c22120f | 62 | info->onenand.irq = platform_get_irq(pdev, 0); |
68ee4b1c | 63 | |
475b44c1 | 64 | info->mtd.name = dev_name(&pdev->dev); |
68ee4b1c KP |
65 | info->mtd.priv = &info->onenand; |
66 | info->mtd.owner = THIS_MODULE; | |
67 | ||
68 | if (onenand_scan(&info->mtd, 1)) { | |
69 | err = -ENXIO; | |
70 | goto out_iounmap; | |
71 | } | |
72 | ||
92ffb00d DES |
73 | err = mtd_device_parse_register(&info->mtd, NULL, 0, |
74 | pdata ? pdata->parts : NULL, | |
75 | pdata ? pdata->nr_parts : 0); | |
68ee4b1c | 76 | |
7a192ec3 | 77 | platform_set_drvdata(pdev, info); |
68ee4b1c KP |
78 | |
79 | return 0; | |
80 | ||
81 | out_iounmap: | |
82 | iounmap(info->onenand.base); | |
83 | out_release_mem_region: | |
84 | release_mem_region(res->start, size); | |
85 | out_free_info: | |
86 | kfree(info); | |
87 | ||
88 | return err; | |
89 | } | |
90 | ||
7a192ec3 | 91 | static int __devexit generic_onenand_remove(struct platform_device *pdev) |
68ee4b1c | 92 | { |
7a192ec3 | 93 | struct onenand_info *info = platform_get_drvdata(pdev); |
68ee4b1c | 94 | struct resource *res = pdev->resource; |
778dbcc1 | 95 | unsigned long size = resource_size(res); |
68ee4b1c | 96 | |
7a192ec3 | 97 | platform_set_drvdata(pdev, NULL); |
68ee4b1c KP |
98 | |
99 | if (info) { | |
68ee4b1c KP |
100 | onenand_release(&info->mtd); |
101 | release_mem_region(res->start, size); | |
102 | iounmap(info->onenand.base); | |
103 | kfree(info); | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
7a192ec3 ML |
109 | static struct platform_driver generic_onenand_driver = { |
110 | .driver = { | |
111 | .name = DRIVER_NAME, | |
112 | .owner = THIS_MODULE, | |
113 | }, | |
68ee4b1c KP |
114 | .probe = generic_onenand_probe, |
115 | .remove = __devexit_p(generic_onenand_remove), | |
116 | }; | |
117 | ||
f99640de | 118 | module_platform_driver(generic_onenand_driver); |
68ee4b1c KP |
119 | |
120 | MODULE_LICENSE("GPL"); | |
121 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
122 | MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards"); | |
f99640de | 123 | MODULE_ALIAS("platform:" DRIVER_NAME); |