From: Michael Tretter <m.tretter@xxxxxxxxxxxxxx>
The bitstream header has 5 fields, that start with a char for the type.
Four fields have a big-ending length and a null-terminated string for
the design name, the part number, and the date and time of creation. The
last field is a big-endian 32 bit unsigned int for the size of the
bitstream.
Print this info when loading the bitstream.
Signed-off-by: Michael Tretter <m.tretter@xxxxxxxxxxxxxx>
---
drivers/firmware/zynqmp-fpga.c | 51 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/drivers/firmware/zynqmp-fpga.c b/drivers/firmware/zynqmp-fpga.c
index 47862a7..8878658 100644
--- a/drivers/firmware/zynqmp-fpga.c
+++ b/drivers/firmware/zynqmp-fpga.c
@@ -45,6 +45,19 @@ struct fpgamgr {
u32 features;
};
+struct bs_header {
+ __be16 length;
+ u8 padding[9];
+ __be16 size;
+ char entries[0];
+} __attribute__ ((packed));
+
+struct bs_header_entry {
+ char type;
+ __be16 length;
+ char data[0];
+} __attribute__ ((packed));
+
/*
* Xilinx KU040 Bitstream Composition:
* Bitstream can be provided with an optinal header (`struct bs_header`).
@@ -143,6 +156,42 @@ static int get_header_length(const char *header, size_t size)
return -EINVAL;
}
+static void zynqmp_fpga_show_header(const struct device_d *dev,
+ struct bs_header *header, size_t size)
+{
+ struct bs_header_entry *entry;
+ unsigned int i;
+ unsigned int length;
+
+ for (i = 0; i < size - sizeof(*header); i += sizeof(*entry) + length) {
+ entry = (struct bs_header_entry *)&header->entries[i];
+ length = __be16_to_cpu(entry->length);
+
+ switch (entry->type) {
+ case 'a':
+ printf("Design: %s\n", entry->data);
+ break;
+ case 'b':
+ printf("Part number: %s\n", entry->data);
+ break;
+ case 'c':
+ printf("Date: %s\n", entry->data);
+ break;
+ case 'd':
+ printf("Time: %s\n", entry->data);
+ break;
+ case 'e':
+ /* Size entry does not have a length but is be32 int */
+ printf("Size: %d bytes\n",
+ (length << 16) + (entry->data[0] << 8) + entry->data[1]);
+ return;
+ default:
+ dev_warn(dev, "Invalid header entry: %c", entry->type);
+ return;
+ }
+ }
+}
+
static int fpgamgr_program_finish(struct firmware_handler *fh)
{
struct fpgamgr *mgr = container_of(fh, struct fpgamgr, fh);
@@ -167,6 +216,8 @@ static int fpgamgr_program_finish(struct firmware_handler *fh)
status = header_length;
goto err_free;
}
+ zynqmp_fpga_show_header(&mgr->dev,
+ (struct bs_header *)mgr->buf, header_length);
body = (u32 *)&mgr->buf[header_length];
body_length = mgr->size - header_length;
--
2.7.4
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