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 */
101 /**
102 * caam_get_era() - fetch the CAAM's era
103 *
104 * The SEC module povides an "Era" which can be used to differentiate
105 * between different revisions.
106 *
107 * Return: era of the SEC.
108 */
caam_get_era(void)109 u8 caam_get_era(void)
110 {
111 static const struct {
112 u16 ip_id;
113 u8 maj_rev;
114 u8 era;
115 } caam_eras[] = {
116 {0x0A10, 1, 1},
117 {0x0A10, 2, 2},
118 {0x0A12, 1, 3},
119 {0x0A14, 1, 3},
120 {0x0A14, 2, 4},
121 {0x0A16, 1, 4},
122 {0x0A10, 3, 4},
123 {0x0A11, 1, 4},
124 {0x0A18, 1, 4},
125 {0x0A11, 2, 5},
126 {0x0A12, 2, 5},
127 {0x0A13, 1, 5},
128 {0x0A1C, 1, 5}
129 };
130
131 ccsr_sec_t __iomem *sec = (void __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
132 u32 secvid_ms = sec_in32(&sec->secvid_ms);
133 u32 ccbvid = sec_in32(&sec->ccbvid);
134 u16 ip_id = (secvid_ms & SEC_SECVID_MS_IPID_MASK) >>
135 SEC_SECVID_MS_IPID_SHIFT;
136 u8 maj_rev = (secvid_ms & SEC_SECVID_MS_MAJ_REV_MASK) >>
137 SEC_SECVID_MS_MAJ_REV_SHIFT;
138 u8 era = (ccbvid & SEC_CCBVID_ERA_MASK) >> SEC_CCBVID_ERA_SHIFT;
139
140 int i;
141
142 if (era) /* This is '0' prior to CAAM ERA-6 */
143 return era;
144
145 for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
146 if (caam_eras[i].ip_id == ip_id &&
147 caam_eras[i].maj_rev == maj_rev)
148 return caam_eras[i].era;
149
150 return 0;
151 }
152
fdt_fixup_crypto_era(void * blob,u32 era)153 static void fdt_fixup_crypto_era(void *blob, u32 era)
154 {
155 int err;
156 int crypto_node;
157
158 crypto_node = fdt_path_offset(blob, "crypto");
159 if (crypto_node < 0) {
160 printf("WARNING: Missing crypto node\n");
161 return;
162 }
163
164 err = fdt_setprop_u32(blob, crypto_node, "fsl,sec-era", era);
165 if (err < 0) {
166 printf("ERROR: could not set fsl,sec-era property: %s\n",
167 fdt_strerror(err));
168 }
169 }
170
fdt_fixup_crypto_node(void * blob,int sec_rev)171 void fdt_fixup_crypto_node(void *blob, int sec_rev)
172 {
173 u8 era;
174
175 if (!sec_rev) {
176 fdt_del_node_and_alias(blob, "crypto");
177 return;
178 }
179
180 /* Add SEC ERA information in compatible */
181 era = caam_get_era();
182 if (era) {
183 fdt_fixup_crypto_era(blob, era);
184 } else {
185 printf("WARNING: Unable to get ERA for CAAM rev: %d\n",
186 sec_rev);
187 }
188 }
189 #endif
190