xref: /openbmc/u-boot/drivers/crypto/fsl/sec.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2014 Freescale Semiconductor, Inc.
4  */
5 
6 #include <common.h>
7 #include <linux/libfdt.h>
8 #include <fdt_support.h>
9 #if CONFIG_SYS_FSL_SEC_COMPAT == 2 || CONFIG_SYS_FSL_SEC_COMPAT >= 4
10 #include <fsl_sec.h>
11 #endif
12 
13 /*
14  * update crypto node properties to a specified revision of the SEC
15  * called with sec_rev == 0 if not on an E processor
16  */
17 #if CONFIG_SYS_FSL_SEC_COMPAT == 2 /* SEC 2.x/3.x */
fdt_fixup_crypto_node(void * blob,int sec_rev)18 void fdt_fixup_crypto_node(void *blob, int sec_rev)
19 {
20 	static const struct sec_rev_prop {
21 		u32 sec_rev;
22 		u32 num_channels;
23 		u32 channel_fifo_len;
24 		u32 exec_units_mask;
25 		u32 descriptor_types_mask;
26 	} sec_rev_prop_list[] = {
27 		{ 0x0200, 4, 24, 0x07e, 0x01010ebf }, /* SEC 2.0 */
28 		{ 0x0201, 4, 24, 0x0fe, 0x012b0ebf }, /* SEC 2.1 */
29 		{ 0x0202, 1, 24, 0x04c, 0x0122003f }, /* SEC 2.2 */
30 		{ 0x0204, 4, 24, 0x07e, 0x012b0ebf }, /* SEC 2.4 */
31 		{ 0x0300, 4, 24, 0x9fe, 0x03ab0ebf }, /* SEC 3.0 */
32 		{ 0x0301, 4, 24, 0xbfe, 0x03ab0ebf }, /* SEC 3.1 */
33 		{ 0x0303, 4, 24, 0x97c, 0x03a30abf }, /* SEC 3.3 */
34 	};
35 	static char compat_strlist[ARRAY_SIZE(sec_rev_prop_list) *
36 				   sizeof("fsl,secX.Y")];
37 	int crypto_node, sec_idx, err;
38 	char *p;
39 	u32 val;
40 
41 	/* locate crypto node based on lowest common compatible */
42 	crypto_node = fdt_node_offset_by_compatible(blob, -1, "fsl,sec2.0");
43 	if (crypto_node == -FDT_ERR_NOTFOUND)
44 		return;
45 
46 	/* delete it if not on an E-processor */
47 	if (crypto_node > 0 && !sec_rev) {
48 		fdt_del_node(blob, crypto_node);
49 		return;
50 	}
51 
52 	/* else we got called for possible uprev */
53 	for (sec_idx = 0; sec_idx < ARRAY_SIZE(sec_rev_prop_list); sec_idx++)
54 		if (sec_rev_prop_list[sec_idx].sec_rev == sec_rev)
55 			break;
56 
57 	if (sec_idx == ARRAY_SIZE(sec_rev_prop_list)) {
58 		puts("warning: unknown SEC revision number\n");
59 		return;
60 	}
61 
62 	err = fdt_setprop_u32(blob, crypto_node, "fsl,num-channels",
63 			      sec_rev_prop_list[sec_idx].num_channels);
64 	if (err < 0)
65 		printf("WARNING: could not set crypto property: %s\n",
66 		       fdt_strerror(err));
67 
68 	err = fdt_setprop_u32(blob, crypto_node, "fsl,descriptor-types-mask",
69 			      sec_rev_prop_list[sec_idx].descriptor_types_mask);
70 	if (err < 0)
71 		printf("WARNING: could not set crypto property: %s\n",
72 		       fdt_strerror(err));
73 
74 	err = fdt_setprop_u32(blob, crypto_node, "fsl,exec-units-mask",
75 			      sec_rev_prop_list[sec_idx].exec_units_mask);
76 	if (err < 0)
77 		printf("WARNING: could not set crypto property: %s\n",
78 		       fdt_strerror(err));
79 
80 	err = fdt_setprop_u32(blob, crypto_node, "fsl,channel-fifo-len",
81 			      sec_rev_prop_list[sec_idx].channel_fifo_len);
82 	if (err < 0)
83 		printf("WARNING: could not set crypto property: %s\n",
84 		       fdt_strerror(err));
85 
86 	val = 0;
87 	while (sec_idx >= 0) {
88 		p = compat_strlist + val;
89 		val += sprintf(p, "fsl,sec%d.%d",
90 			(sec_rev_prop_list[sec_idx].sec_rev & 0xff00) >> 8,
91 			sec_rev_prop_list[sec_idx].sec_rev & 0x00ff) + 1;
92 		sec_idx--;
93 	}
94 	err = fdt_setprop(blob, crypto_node, "compatible", &compat_strlist,
95 			  val);
96 	if (err < 0)
97 		printf("WARNING: could not set crypto property: %s\n",
98 		       fdt_strerror(err));
99 }
100 #elif CONFIG_SYS_FSL_SEC_COMPAT >= 4  /* SEC4 */
caam_get_era(void)101 static u8 caam_get_era(void)
102 {
103 	static const struct {
104 		u16 ip_id;
105 		u8 maj_rev;
106 		u8 era;
107 	} caam_eras[] = {
108 		{0x0A10, 1, 1},
109 		{0x0A10, 2, 2},
110 		{0x0A12, 1, 3},
111 		{0x0A14, 1, 3},
112 		{0x0A14, 2, 4},
113 		{0x0A16, 1, 4},
114 		{0x0A10, 3, 4},
115 		{0x0A11, 1, 4},
116 		{0x0A18, 1, 4},
117 		{0x0A11, 2, 5},
118 		{0x0A12, 2, 5},
119 		{0x0A13, 1, 5},
120 		{0x0A1C, 1, 5}
121 	};
122 
123 	ccsr_sec_t __iomem *sec = (void __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
124 	u32 secvid_ms = sec_in32(&sec->secvid_ms);
125 	u32 ccbvid = sec_in32(&sec->ccbvid);
126 	u16 ip_id = (secvid_ms & SEC_SECVID_MS_IPID_MASK) >>
127 				SEC_SECVID_MS_IPID_SHIFT;
128 	u8 maj_rev = (secvid_ms & SEC_SECVID_MS_MAJ_REV_MASK) >>
129 				SEC_SECVID_MS_MAJ_REV_SHIFT;
130 	u8 era = (ccbvid & SEC_CCBVID_ERA_MASK) >> SEC_CCBVID_ERA_SHIFT;
131 
132 	int i;
133 
134 	if (era)	/* This is '0' prior to CAAM ERA-6 */
135 		return era;
136 
137 	for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
138 		if (caam_eras[i].ip_id == ip_id &&
139 		    caam_eras[i].maj_rev == maj_rev)
140 			return caam_eras[i].era;
141 
142 	return 0;
143 }
144 
fdt_fixup_crypto_era(void * blob,u32 era)145 static void fdt_fixup_crypto_era(void *blob, u32 era)
146 {
147 	int err;
148 	int crypto_node;
149 
150 	crypto_node = fdt_path_offset(blob, "crypto");
151 	if (crypto_node < 0) {
152 		printf("WARNING: Missing crypto node\n");
153 		return;
154 	}
155 
156 	err = fdt_setprop_u32(blob, crypto_node, "fsl,sec-era", era);
157 	if (err < 0) {
158 		printf("ERROR: could not set fsl,sec-era property: %s\n",
159 		       fdt_strerror(err));
160 	}
161 }
162 
fdt_fixup_crypto_node(void * blob,int sec_rev)163 void fdt_fixup_crypto_node(void *blob, int sec_rev)
164 {
165 	u8 era;
166 
167 	if (!sec_rev) {
168 		fdt_del_node_and_alias(blob, "crypto");
169 		return;
170 	}
171 
172 	/* Add SEC ERA information in compatible */
173 	era = caam_get_era();
174 	if (era) {
175 		fdt_fixup_crypto_era(blob, era);
176 	} else {
177 		printf("WARNING: Unable to get ERA for CAAM rev: %d\n",
178 		       sec_rev);
179 	}
180 }
181 #endif
182