From: Ibai Erkiaga <ibai.erkiaga-elorza@xilinx.com>
Date: Thu, 5 Apr 2018 12:19:27 +0000 (-0700)
Subject: fpga: zynqpl: Check if aes engine is enabled
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c64afba2fb483d416ad5da9dfe3f1f156ccf2366;p=oweals%2Fu-boot.git

fpga: zynqpl: Check if aes engine is enabled

AES engine cannot be used if has not been enabled at boot time
with an encrypted boot image.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@xilinx.com>
Acked-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index de71969399..90bb850833 100644
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -22,6 +22,7 @@
 #define DEVCFG_CTRL_PCFG_PROG_B		0x40000000
 #define DEVCFG_CTRL_PCFG_AES_EFUSE_MASK	0x00001000
 #define DEVCFG_CTRL_PCAP_RATE_EN_MASK	0x02000000
+#define DEVCFG_CTRL_PCFG_AES_EN_MASK	0x00000E00
 #define DEVCFG_ISR_FATAL_ERROR_MASK	0x00740040
 #define DEVCFG_ISR_ERROR_FLAGS_MASK	0x00340840
 #define DEVCFG_ISR_RX_FIFO_OV		0x00040000
@@ -522,6 +523,13 @@ int zynq_decrypt_load(u32 srcaddr, u32 srclen, u32 dstaddr, u32 dstlen,
 		return FPGA_FAIL;
 	}
 
+	/* Check AES engine is enabled */
+	if (!(readl(&devcfg_base->ctrl) &
+	      DEVCFG_CTRL_PCFG_AES_EN_MASK)) {
+		printf("%s: AES engine is not enabled\n", __func__);
+		return FPGA_FAIL;
+	}
+
 	if (zynq_dma_xfer_init(bstype)) {
 		printf("%s: zynq_dma_xfer_init FAIL\n", __func__);
 		return FPGA_FAIL;