1*552a848eSStefano Babic /*
2*552a848eSStefano Babic * Copyright 2008-2015 Freescale Semiconductor, Inc.
3*552a848eSStefano Babic *
4*552a848eSStefano Babic * SPDX-License-Identifier: GPL-2.0+
5*552a848eSStefano Babic *
6*552a848eSStefano Babic * Command for encapsulating DEK blob
7*552a848eSStefano Babic */
8*552a848eSStefano Babic
9*552a848eSStefano Babic #include <common.h>
10*552a848eSStefano Babic #include <command.h>
11*552a848eSStefano Babic #include <environment.h>
12*552a848eSStefano Babic #include <malloc.h>
13*552a848eSStefano Babic #include <asm/byteorder.h>
14*552a848eSStefano Babic #include <linux/compiler.h>
15*552a848eSStefano Babic #include <fsl_sec.h>
16*552a848eSStefano Babic #include <asm/arch/clock.h>
17*552a848eSStefano Babic #include <mapmem.h>
18*552a848eSStefano Babic
19*552a848eSStefano Babic DECLARE_GLOBAL_DATA_PTR;
20*552a848eSStefano Babic
21*552a848eSStefano Babic /**
22*552a848eSStefano Babic * blob_dek() - Encapsulate the DEK as a blob using CAM's Key
23*552a848eSStefano Babic * @src: - Address of data to be encapsulated
24*552a848eSStefano Babic * @dst: - Desination address of encapsulated data
25*552a848eSStefano Babic * @len: - Size of data to be encapsulated
26*552a848eSStefano Babic *
27*552a848eSStefano Babic * Returns zero on success,and negative on error.
28*552a848eSStefano Babic */
blob_encap_dek(const u8 * src,u8 * dst,u32 len)29*552a848eSStefano Babic static int blob_encap_dek(const u8 *src, u8 *dst, u32 len)
30*552a848eSStefano Babic {
31*552a848eSStefano Babic int ret = 0;
32*552a848eSStefano Babic u32 jr_size = 4;
33*552a848eSStefano Babic
34*552a848eSStefano Babic u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c);
35*552a848eSStefano Babic if (out_jr_size != jr_size) {
36*552a848eSStefano Babic hab_caam_clock_enable(1);
37*552a848eSStefano Babic sec_init();
38*552a848eSStefano Babic }
39*552a848eSStefano Babic
40*552a848eSStefano Babic if (!((len == 128) | (len == 192) | (len == 256))) {
41*552a848eSStefano Babic debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
42*552a848eSStefano Babic return -1;
43*552a848eSStefano Babic }
44*552a848eSStefano Babic
45*552a848eSStefano Babic len /= 8;
46*552a848eSStefano Babic ret = blob_dek(src, dst, len);
47*552a848eSStefano Babic
48*552a848eSStefano Babic return ret;
49*552a848eSStefano Babic }
50*552a848eSStefano Babic
51*552a848eSStefano Babic /**
52*552a848eSStefano Babic * do_dek_blob() - Handle the "dek_blob" command-line command
53*552a848eSStefano Babic * @cmdtp: Command data struct pointer
54*552a848eSStefano Babic * @flag: Command flag
55*552a848eSStefano Babic * @argc: Command-line argument count
56*552a848eSStefano Babic * @argv: Array of command-line arguments
57*552a848eSStefano Babic *
58*552a848eSStefano Babic * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
59*552a848eSStefano Babic * on error.
60*552a848eSStefano Babic */
do_dek_blob(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])61*552a848eSStefano Babic static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
62*552a848eSStefano Babic {
63*552a848eSStefano Babic uint32_t src_addr, dst_addr, len;
64*552a848eSStefano Babic uint8_t *src_ptr, *dst_ptr;
65*552a848eSStefano Babic int ret = 0;
66*552a848eSStefano Babic
67*552a848eSStefano Babic if (argc != 4)
68*552a848eSStefano Babic return CMD_RET_USAGE;
69*552a848eSStefano Babic
70*552a848eSStefano Babic src_addr = simple_strtoul(argv[1], NULL, 16);
71*552a848eSStefano Babic dst_addr = simple_strtoul(argv[2], NULL, 16);
72*552a848eSStefano Babic len = simple_strtoul(argv[3], NULL, 10);
73*552a848eSStefano Babic
74*552a848eSStefano Babic src_ptr = map_sysmem(src_addr, len/8);
75*552a848eSStefano Babic dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8));
76*552a848eSStefano Babic
77*552a848eSStefano Babic ret = blob_encap_dek(src_ptr, dst_ptr, len);
78*552a848eSStefano Babic
79*552a848eSStefano Babic return ret;
80*552a848eSStefano Babic }
81*552a848eSStefano Babic
82*552a848eSStefano Babic /***************************************************/
83*552a848eSStefano Babic static char dek_blob_help_text[] =
84*552a848eSStefano Babic "src dst len - Encapsulate and create blob of data\n"
85*552a848eSStefano Babic " $len bits long at address $src and\n"
86*552a848eSStefano Babic " store the result at address $dst.\n";
87*552a848eSStefano Babic
88*552a848eSStefano Babic U_BOOT_CMD(
89*552a848eSStefano Babic dek_blob, 4, 1, do_dek_blob,
90*552a848eSStefano Babic "Data Encryption Key blob encapsulation",
91*552a848eSStefano Babic dek_blob_help_text
92*552a848eSStefano Babic );
93