add JLINK protocol doc ref

Provide URL for a recent
version of JLINK protocol.
Signed-Off-By: David Brownell <dbrownell@users.sourceforge.net>

diff --git a/src/jtag/drivers/jlink.c b/src/jtag/drivers/jlink.c
index 52f12b4378a12071354b7cc530494c72b269780d..ff389e9ef798368d2639e129ccebca217afec097 100644 (file)
--- a/src/jtag/drivers/jlink.c
+++ b/src/jtag/drivers/jlink.c
@@ -32,6 +32,9 @@
 /* See Segger's public documentation:
  *     Reference manual for J-Link USB Protocol
  *     Document RM08001-R6 Date: June 16, 2009
+ *      (Or newer, with some SWD information).
+ 
+http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
  */
 
 #define VID 0x1366