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 de71969..90bb850 100644 (file)
--- 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;