This patch adds support for retrieving the version of the RNG
block inside the SEC. This is done by retrieving the corresponding
value from the the CHAVID register.
Signed-off-by: Alex Porosanu <alexandru.porosanu@xxxxxxxxxxxxx>
---
drivers/crypto/caam/ctrl.c | 11 +++++++++++
drivers/crypto/caam/regs.h | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index bf20dd8..d5e6837 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -189,6 +189,17 @@ int caam_get_era(u64 caam_id)
}
EXPORT_SYMBOL(caam_get_era);
+/**
+ * get_rng_vid() - Return the version of the (T)RNG block of the SEC.
+ * @topregs - pointer to SEC register space
+ **/
+static inline u8 get_rng_vid(struct caam_full __iomem *topregs)
+{
+ u64 cha_vid = rd_reg64(&topregs->ctrl.perfmon.cha_id);
+
+ return (cha_vid & CHA_ID_RNG_MASK) >> CHA_ID_RNG_SHIFT;
+}
+
/* Probe routine for CAAM top (controller) level */
static int caam_probe(struct platform_device *pdev)
{
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 3223fc6..f0af0bb 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -117,6 +117,43 @@ struct jr_outentry {
#define CHA_NUM_DECONUM_SHIFT 56
#define CHA_NUM_DECONUM_MASK (0xfull << CHA_NUM_DECONUM_SHIFT)
+/* CHA Version IDs */
+#define CHA_ID_AES_SHIFT 0
+#define CHA_ID_AES_MASK (0xfull << CHA_ID_AES_SHIFT)
+
+#define CHA_ID_DES_SHIFT 4
+#define CHA_ID_DES_MASK (0xfull << CHA_ID_DES_SHIFT)
+
+#define CHA_ID_ARC4_SHIFT 8
+#define CHA_ID_ARC4_MASK (0xfull << CHA_ID_ARC4_SHIFT)
+
+#define CHA_ID_MD_SHIFT 12
+#define CHA_ID_MD_MASK (0xfull << CHA_ID_MD_SHIFT)
+
+#define CHA_ID_RNG_SHIFT 16
+#define CHA_ID_RNG_MASK (0xfull << CHA_ID_RNG_SHIFT)
+
+#define CHA_ID_SNW8_SHIFT 20
+#define CHA_ID_SNW8_MASK (0xfull << CHA_ID_SNW8_SHIFT)
+
+#define CHA_ID_KAS_SHIFT 24
+#define CHA_ID_KAS_MASK (0xfull << CHA_ID_KAS_SHIFT)
+
+#define CHA_ID_PK_SHIFT 28
+#define CHA_ID_PK_MASK (0xfull << CHA_ID_PK_SHIFT)
+
+#define CHA_ID_CRC_SHIFT 32
+#define CHA_ID_CRC_MASK (0xfull << CHA_ID_CRC_SHIFT)
+
+#define CHA_ID_SNW9_SHIFT 36
+#define CHA_ID_SNW9_MASK (0xfull << CHA_ID_SNW9_SHIFT)
+
+#define CHA_ID_DECO_SHIFT 56
+#define CHA_ID_DECO_MASK (0xfull << CHA_ID_DECO_SHIFT)
+
+#define CHA_ID_JR_SHIFT 60
+#define CHA_ID_JR_MASK (0xfull << CHA_ID_JR_SHIFT)
+
struct sec_vid {
u16 ip_id;
u8 maj_rev;
--
1.7.7.6
--
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