crypto: ccree - add HW engine config check

Add check to verify the stated device tree HW configuration
matches the HW.

Signed-off-by: Gilad Ben-Yossef <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/ccree/cc_driver.c

···
 		}
 		sig_cidr = val;
 
+		/* Check HW engine configuration */
+		val = cc_ioread(new_drvdata, CC_REG(HOST_REMOVE_INPUT_PINS));
+		switch (val) {
+		case CC_PINS_FULL:
+			/* This is fine */
+			break;
+		case CC_PINS_SLIM:
+			if (new_drvdata->std_bodies & CC_STD_NIST) {
+				dev_warn(dev, "703 mode forced due to HW configuration.\n");
+				new_drvdata->std_bodies = CC_STD_OSCCA;
+			}
+			break;
+		default:
+			dev_err(dev, "Unsupported engines configration.\n");
+			rc = -EINVAL;
+			goto post_clk_err;
+		}
+
 		/* Check security disable state */
 		val = cc_ioread(new_drvdata, CC_REG(SECURITY_DISABLED));
 		val &= CC_SECURITY_DISABLED_MASK;

drivers/crypto/ccree/cc_driver.h

···
 
 #define CC_COHERENT_CACHE_PARAMS 0xEEE
 
+#define CC_PINS_FULL	0x0
+#define CC_PINS_SLIM	0x9F
+
 /* Maximum DMA mask supported by IP */
 #define DMA_BIT_MASK_LEN 48
 

drivers/crypto/ccree/cc_host_regs.h

···
 #define CC_HOST_POWER_DOWN_EN_REG_OFFSET	0xA78UL
 #define CC_HOST_POWER_DOWN_EN_VALUE_BIT_SHIFT	0x0UL
 #define CC_HOST_POWER_DOWN_EN_VALUE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REG_OFFSET	0x0A7CUL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_ENGINE_BIT_SHIFT	0x0UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_MAC_ENGINE_BIT_SHIFT	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_MAC_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_GHASH_ENGINE_BIT_SHIFT	0x2UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_GHASH_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_DES_ENGINE_BIT_SHIFT	0x3UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_DES_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_HASH_ENGINE_BIT_SHIFT	0x4UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_HASH_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM3_ENGINE_BIT_SHIFT	0x5UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM3_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM4_ENGINE_BIT_SHIFT	0x6UL
+#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM4_ENGINE_BIT_SIZE	0x1UL
+#define CC_HOST_REMOVE_INPUT_PINS_OTP_DISCONNECTED_BIT_SHIFT	0x7UL
+#define CC_HOST_REMOVE_INPUT_PINS_OTP_DISCONNECTED_BIT_SIZE	0x1UL
 // --------------------------------------
 // BLOCK: ID_REGISTERS
 // --------------------------------------