diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/fpga/zynq-fpga.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c index f674e32..c3fc2a2 100644 --- a/drivers/fpga/zynq-fpga.c +++ b/drivers/fpga/zynq-fpga.c @@ -161,6 +161,19 @@ static irqreturn_t zynq_fpga_isr(int irq, void *data) return IRQ_HANDLED; } +/* Sanity check the proposed bitstream. It must start with the sync word in + * the correct byte order, and be dword aligned. The input is a Xilinx .bin + * file with every 32 bit quantity swapped. + */ +static bool zynq_fpga_has_sync(const u8 *buf, size_t count) +{ + for (; count >= 4; buf += 4, count -= 4) + if (buf[0] == 0x66 && buf[1] == 0x55 && buf[2] == 0x99 && + buf[3] == 0xaa) + return true; + return false; +} + static int zynq_fpga_ops_write_init(struct fpga_manager *mgr, struct fpga_image_info *info, const char *buf, size_t count) @@ -177,6 +190,13 @@ static int zynq_fpga_ops_write_init(struct fpga_manager *mgr, /* don't globally reset PL if we're doing partial reconfig */ if (!(info->flags & FPGA_MGR_PARTIAL_RECONFIG)) { + if (!zynq_fpga_has_sync(buf, count)) { + dev_err(&mgr->dev, + "Invalid bitstream, could not find a sync word. Bitstream must be a byte swapped .bin file\n"); + err = -EINVAL; + goto out_err; + } + /* assert AXI interface resets */ regmap_write(priv->slcr, SLCR_FPGA_RST_CTRL_OFFSET, FPGA_RST_ALL_MASK); @@ -410,6 +430,7 @@ static enum fpga_mgr_states zynq_fpga_ops_state(struct fpga_manager *mgr) } static const struct fpga_manager_ops zynq_fpga_ops = { + .initial_header_size = 128, .state = zynq_fpga_ops_state, .write_init = zynq_fpga_ops_write_init, .write = zynq_fpga_ops_write, |
