diff options
| author | Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com> | 2018-03-06 17:37:09 +0530 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2018-04-09 12:14:50 +0200 |
| commit | 71723aaec5e6dbfbc401d65461fe1cae98912e79 (patch) | |
| tree | bd611c326ef1106c1dd17f059933d7e7d93a4350 /drivers/fpga | |
| parent | 31bcb3444cbd5002ca9d8f6a3a2644092748cdba (diff) | |
fpga: zynq: Add delay after PCFG_PROG_B change
There is delay needed after PCFG_PROGB change if
AES key source is efuse. This fixes the issue of
encrypted bitstream loading with AES efuse as key
source.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/zynqpl.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c index 2ff716c252..db9bd12992 100644 --- a/drivers/fpga/zynqpl.c +++ b/drivers/fpga/zynqpl.c @@ -17,6 +17,7 @@ #include <asm/arch/sys_proto.h> #define DEVCFG_CTRL_PCFG_PROG_B 0x40000000 +#define DEVCFG_CTRL_PCFG_AES_EFUSE_MASK 0x00001000 #define DEVCFG_ISR_FATAL_ERROR_MASK 0x00740040 #define DEVCFG_ISR_ERROR_FLAGS_MASK 0x00340840 #define DEVCFG_ISR_RX_FIFO_OV 0x00040000 @@ -205,9 +206,24 @@ static int zynq_dma_xfer_init(bitstream_type bstype) /* Setting PCFG_PROG_B signal to high */ control = readl(&devcfg_base->ctrl); writel(control | DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl); + + /* + * Delay is required if AES efuse is selected as + * key source. + */ + if (control & DEVCFG_CTRL_PCFG_AES_EFUSE_MASK) + mdelay(5); + /* Setting PCFG_PROG_B signal to low */ writel(control & ~DEVCFG_CTRL_PCFG_PROG_B, &devcfg_base->ctrl); + /* + * Delay is required if AES efuse is selected as + * key source. + */ + if (control & DEVCFG_CTRL_PCFG_AES_EFUSE_MASK) + mdelay(5); + /* Polling the PCAP_INIT status for Reset */ ts = get_timer(0); while (readl(&devcfg_base->status) & DEVCFG_STATUS_PCFG_INIT) { |