uboot/drivers/crypto/fsl/sec.c
<<
>>
Prefs
   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 *)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
 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