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1 | /* |
2 | * S3C series device definition for nand device |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License version 2 as |
6 | * published by the Free Software Foundation. |
7 | */ |
8 | |
9 | #include <linux/gfp.h> |
10 | #include <linux/kernel.h> |
11 | #include <linux/platform_device.h> |
12 | |
13 | #include <linux/mtd/mtd.h> |
14 | #include <linux/mtd/partitions.h> |
15 | |
16 | #include <mach/map.h> |
17 | #include <plat/devs.h> |
18 | #include <plat/nand.h> |
19 | |
20 | static struct resource s3c_nand_resource[] = { |
21 | [0] = { |
22 | .start = S3C_PA_NAND, |
23 | .end = S3C_PA_NAND + SZ_1M, |
24 | .flags = IORESOURCE_MEM, |
25 | } |
26 | }; |
27 | |
28 | struct platform_device s3c_device_nand = { |
29 | .name = "s3c2410-nand", |
30 | .id = -1, |
31 | .num_resources = ARRAY_SIZE(s3c_nand_resource), |
32 | .resource = s3c_nand_resource, |
33 | }; |
34 | |
35 | EXPORT_SYMBOL(s3c_device_nand); |
36 | |
37 | /** |
38 | * s3c_nand_copy_set() - copy nand set data |
39 | * @set: The new structure, directly copied from the old. |
40 | * |
41 | * Copy all the fields from the NAND set field from what is probably __initdata |
42 | * to new kernel memory. The code returns 0 if the copy happened correctly or |
43 | * an error code for the calling function to display. |
44 | * |
45 | * Note, we currently do not try and look to see if we've already copied the |
46 | * data in a previous set. |
47 | */ |
48 | static int __init s3c_nand_copy_set(struct s3c2410_nand_set *set) |
49 | { |
50 | void *ptr; |
51 | int size; |
52 | |
53 | size = sizeof(struct mtd_partition) * set->nr_partitions; |
54 | if (size) { |
55 | ptr = kmemdup(set->partitions, size, GFP_KERNEL); |
56 | set->partitions = ptr; |
57 | |
58 | if (!ptr) |
59 | return -ENOMEM; |
60 | } |
61 | |
62 | if (set->nr_map && set->nr_chips) { |
63 | size = sizeof(int) * set->nr_chips; |
64 | ptr = kmemdup(set->nr_map, size, GFP_KERNEL); |
65 | set->nr_map = ptr; |
66 | |
67 | if (!ptr) |
68 | return -ENOMEM; |
69 | } |
70 | |
71 | if (set->ecc_layout) { |
72 | ptr = kmemdup(set->ecc_layout, |
73 | sizeof(struct nand_ecclayout), GFP_KERNEL); |
74 | set->ecc_layout = ptr; |
75 | |
76 | if (!ptr) |
77 | return -ENOMEM; |
78 | } |
79 | |
80 | return 0; |
81 | } |
82 | |
83 | void __init s3c_nand_set_platdata(struct s3c2410_platform_nand *nand) |
84 | { |
85 | struct s3c2410_platform_nand *npd; |
86 | int size; |
87 | int ret; |
88 | |
89 | /* note, if we get a failure in allocation, we simply drop out of the |
90 | * function. If there is so little memory available at initialisation |
91 | * time then there is little chance the system is going to run. |
92 | */ |
93 | |
94 | npd = kmemdup(nand, sizeof(struct s3c2410_platform_nand), GFP_KERNEL); |
95 | if (!npd) { |
96 | printk(KERN_ERR "%s: failed copying platform data\n", __func__); |
97 | return; |
98 | } |
99 | |
100 | /* now see if we need to copy any of the nand set data */ |
101 | |
102 | size = sizeof(struct s3c2410_nand_set) * npd->nr_sets; |
103 | if (size) { |
104 | struct s3c2410_nand_set *from = npd->sets; |
105 | struct s3c2410_nand_set *to; |
106 | int i; |
107 | |
108 | to = kmemdup(from, size, GFP_KERNEL); |
109 | npd->sets = to; /* set, even if we failed */ |
110 | |
111 | if (!to) { |
112 | printk(KERN_ERR "%s: no memory for sets\n", __func__); |
113 | return; |
114 | } |
115 | |
116 | for (i = 0; i < npd->nr_sets; i++) { |
117 | ret = s3c_nand_copy_set(to); |
118 | if (ret) { |
119 | printk(KERN_ERR "%s: failed to copy set %d\n", |
120 | __func__, i); |
121 | return; |
122 | } |
123 | to++; |
124 | } |
125 | } |
126 | |
127 | s3c_device_nand.dev.platform_data = npd; |
128 | } |
129 | |
130 | EXPORT_SYMBOL_GPL(s3c_nand_set_platdata); |
131 |
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