1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2008-2015 Freescale Semiconductor, Inc.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Command for encapsulating DEK blob
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <common.h>
10*4882a593Smuzhiyun #include <command.h>
11*4882a593Smuzhiyun #include <environment.h>
12*4882a593Smuzhiyun #include <malloc.h>
13*4882a593Smuzhiyun #include <asm/byteorder.h>
14*4882a593Smuzhiyun #include <linux/compiler.h>
15*4882a593Smuzhiyun #include <fsl_sec.h>
16*4882a593Smuzhiyun #include <asm/arch/clock.h>
17*4882a593Smuzhiyun #include <mapmem.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /**
22*4882a593Smuzhiyun * blob_dek() - Encapsulate the DEK as a blob using CAM's Key
23*4882a593Smuzhiyun * @src: - Address of data to be encapsulated
24*4882a593Smuzhiyun * @dst: - Desination address of encapsulated data
25*4882a593Smuzhiyun * @len: - Size of data to be encapsulated
26*4882a593Smuzhiyun *
27*4882a593Smuzhiyun * Returns zero on success,and negative on error.
28*4882a593Smuzhiyun */
blob_encap_dek(const u8 * src,u8 * dst,u32 len)29*4882a593Smuzhiyun static int blob_encap_dek(const u8 *src, u8 *dst, u32 len)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun int ret = 0;
32*4882a593Smuzhiyun u32 jr_size = 4;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c);
35*4882a593Smuzhiyun if (out_jr_size != jr_size) {
36*4882a593Smuzhiyun hab_caam_clock_enable(1);
37*4882a593Smuzhiyun sec_init();
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (!((len == 128) | (len == 192) | (len == 256))) {
41*4882a593Smuzhiyun debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
42*4882a593Smuzhiyun return -1;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun len /= 8;
46*4882a593Smuzhiyun ret = blob_dek(src, dst, len);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return ret;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun /**
52*4882a593Smuzhiyun * do_dek_blob() - Handle the "dek_blob" command-line command
53*4882a593Smuzhiyun * @cmdtp: Command data struct pointer
54*4882a593Smuzhiyun * @flag: Command flag
55*4882a593Smuzhiyun * @argc: Command-line argument count
56*4882a593Smuzhiyun * @argv: Array of command-line arguments
57*4882a593Smuzhiyun *
58*4882a593Smuzhiyun * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
59*4882a593Smuzhiyun * on error.
60*4882a593Smuzhiyun */
do_dek_blob(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])61*4882a593Smuzhiyun static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun uint32_t src_addr, dst_addr, len;
64*4882a593Smuzhiyun uint8_t *src_ptr, *dst_ptr;
65*4882a593Smuzhiyun int ret = 0;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun if (argc != 4)
68*4882a593Smuzhiyun return CMD_RET_USAGE;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun src_addr = simple_strtoul(argv[1], NULL, 16);
71*4882a593Smuzhiyun dst_addr = simple_strtoul(argv[2], NULL, 16);
72*4882a593Smuzhiyun len = simple_strtoul(argv[3], NULL, 10);
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun src_ptr = map_sysmem(src_addr, len/8);
75*4882a593Smuzhiyun dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8));
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun ret = blob_encap_dek(src_ptr, dst_ptr, len);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun return ret;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun /***************************************************/
83*4882a593Smuzhiyun static char dek_blob_help_text[] =
84*4882a593Smuzhiyun "src dst len - Encapsulate and create blob of data\n"
85*4882a593Smuzhiyun " $len bits long at address $src and\n"
86*4882a593Smuzhiyun " store the result at address $dst.\n";
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun U_BOOT_CMD(
89*4882a593Smuzhiyun dek_blob, 4, 1, do_dek_blob,
90*4882a593Smuzhiyun "Data Encryption Key blob encapsulation",
91*4882a593Smuzhiyun dek_blob_help_text
92*4882a593Smuzhiyun );
93