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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 50b9782c83b66ce7ed89049421529f3ba34096d2 / . / tools / vybridimage.c
blob: a31fc1099cb5c278b9235ccf7586b78940e82d58 [file] [log] [blame]
Albert ARIBAUD \(3ADEV\)ed0c2c02016-09-26 09:08:06 +0200[diff] [blame]1/*
2 * Image manipulator for Vybrid SoCs
3 *
4 * Derived from vybridimage.c
5 *
6 * (C) Copyright 2016 DENX Software Engineering GmbH
7 * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
8 *
9 * SPDX-License-Identifier: GPL-2.0+
10 */
11
12#include "imagetool.h"
13#include <compiler.h>
14#include <image.h>
15
16/*
17 * NAND page 0 boot header
18 */
19
20struct nand_page_0_boot_header {
21 union {
22 uint32_t fcb[128];
23 uint8_t fcb_bytes[512];
24 }; /* 0x00000000 - 0x000001ff */
25 uint8_t sw_ecc[512]; /* 0x00000200 - 0x000003ff */
26 uint32_t padding[65280]; /* 0x00000400 - 0x0003ffff */
27 uint8_t ivt_prefix[1024]; /* 0x00040000 - 0x000403ff */
28};
29
30/* signature byte for a readable block */
31
32static struct nand_page_0_boot_header vybridimage_header;
33
34static int vybridimage_check_image_types(uint8_t type)
35{
36 if (type == IH_TYPE_VYBRIDIMAGE)
37 return EXIT_SUCCESS;
38 return EXIT_FAILURE;
39}
40
41static uint8_t vybridimage_sw_ecc(uint8_t byte)
42{
43 uint8_t bit0 = (byte & (1 << 0)) ? 1 : 0;
44 uint8_t bit1 = (byte & (1 << 1)) ? 1 : 0;
45 uint8_t bit2 = (byte & (1 << 2)) ? 1 : 0;
46 uint8_t bit3 = (byte & (1 << 3)) ? 1 : 0;
47 uint8_t bit4 = (byte & (1 << 4)) ? 1 : 0;
48 uint8_t bit5 = (byte & (1 << 5)) ? 1 : 0;
49 uint8_t bit6 = (byte & (1 << 6)) ? 1 : 0;
50 uint8_t bit7 = (byte & (1 << 7)) ? 1 : 0;
51 uint8_t res = 0;
52
53 res |= ((bit6 ^ bit5 ^ bit3 ^ bit2) << 0);
54 res |= ((bit7 ^ bit5 ^ bit4 ^ bit2 ^ bit1) << 1);
55 res |= ((bit7 ^ bit6 ^ bit5 ^ bit1 ^ bit0) << 2);
56 res |= ((bit7 ^ bit4 ^ bit3 ^ bit0) << 3);
57 res |= ((bit6 ^ bit4 ^ bit3 ^ bit2 ^ bit1 ^ bit0) << 4);
58
59 return res;
60}
61
62static int vybridimage_verify_header(unsigned char *ptr, int image_size,
63 struct image_tool_params *params)
64{
65 struct nand_page_0_boot_header *hdr =
66 (struct nand_page_0_boot_header *)ptr;
67 int idx;
68
69 if (hdr->fcb[1] != 0x46434220)
70 return -1;
71 if (hdr->fcb[2] != 1)
72 return -1;
73 if (hdr->fcb[7] != 64)
74 return -1;
75 if (hdr->fcb[14] != 6)
76 return -1;
77 if (hdr->fcb[30] != 0x0001ff00)
78 return -1;
79 if (hdr->fcb[43] != 1)
80 return -1;
81 if (hdr->fcb[54] != 0)
82 return -1;
83 if (hdr->fcb[55] != 8)
84 return -1;
85
86 /* check software ECC */
87 for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++) {
88 uint8_t sw_ecc = vybridimage_sw_ecc(hdr->fcb_bytes[idx]);
89 if (sw_ecc != hdr->sw_ecc[idx])
90 return -1;
91 }
92
93 return 0;
94}
95
96static void vybridimage_set_header(void *ptr, struct stat *sbuf, int ifd,
97 struct image_tool_params *params)
98{
99 struct nand_page_0_boot_header *hdr =
100 (struct nand_page_0_boot_header *)ptr;
101 int idx;
102
103 /* fill header with 0x00 for first 56 entries then 0xff */
104 memset(&hdr->fcb[0], 0x0, 56*sizeof(uint32_t));
105 memset(&hdr->fcb[56], 0xff, 72*sizeof(uint32_t));
106 /* fill SW ecc and padding with 0xff */
107 memset(&hdr->sw_ecc[0], 0xff, sizeof(hdr->sw_ecc));
108 memset(&hdr->padding[0], 0xff, sizeof(hdr->padding));
109 /* fill IVT prefix with 0x00 */
110 memset(&hdr->ivt_prefix[0], 0x00, sizeof(hdr->ivt_prefix));
111
112 /* populate fcb */
113 hdr->fcb[1] = 0x46434220; /* signature */
114 hdr->fcb[2] = 0x00000001; /* version */
115 hdr->fcb[5] = 2048; /* page size */
116 hdr->fcb[6] = (2048+64); /* page + OOB size */
117 hdr->fcb[7] = 64; /* pages per block */
118 hdr->fcb[14] = 6; /* ECC mode 6 */
119 hdr->fcb[26] = 128; /* fw address (0x40000) in 2K pages */
120 hdr->fcb[27] = 128; /* fw address (0x40000) in 2K pages */
121 hdr->fcb[30] = 0x0001ff00; /* DBBT search area start address */
122 hdr->fcb[33] = 2048; /* BB marker physical offset */
123 hdr->fcb[43] = 1; /* DISBBM */
124 hdr->fcb[54] = 0; /* DISBB_Search */
125 hdr->fcb[55] = 8; /* Bad block search limit */
126
127 /* compute software ECC */
128 for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++)
129 hdr->sw_ecc[idx] = vybridimage_sw_ecc(hdr->fcb_bytes[idx]);
130}
131
132static void vybridimage_print_hdr_field(struct nand_page_0_boot_header *hdr,
133 int idx)
134{
135 printf("header.fcb[%d] = %08x\n", idx, hdr->fcb[idx]);
136}
137
138static void vybridimage_print_header(const void *ptr)
139{
140 struct nand_page_0_boot_header *hdr =
141 (struct nand_page_0_boot_header *)ptr;
142 int idx;
143
144 for (idx = 0; idx < 56; idx++)
145 vybridimage_print_hdr_field(hdr, idx);
146}
147
148/*
149 * vybridimage parameters
150 */
151U_BOOT_IMAGE_TYPE(
152 vybridimage,
153 "Vybrid Boot Image",
154 sizeof(vybridimage_header),
155 (void *)&vybridimage_header,
156 NULL,
157 vybridimage_verify_header,
158 vybridimage_print_header,
159 vybridimage_set_header,
160 NULL,
161 vybridimage_check_image_types,
162 NULL,
163 NULL
164);