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 */
18void 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 */
109u8 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 *)CFG_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
153static 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
171void 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