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authorStephan Gatzka <stephan.gatzka@hbm.com>2012-10-22 23:11:41 +0000
committerTom Rini <trini@ti.com>2012-10-29 14:21:20 -0700
commita99c040c337753a7141263b36e91209f504191f1 (patch)
treecf54ea1e21c456aab5a20453b7ae8e4c911dcbdc
parent045fa1e1142552799ad3203e9e0bc22a11e866ea (diff)
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FPGA: Cyclon II: Correctly reset the FPGA before configuration
Deassert the CONFIG pin before asserting it again. This assures that the FPGA will be resetted and therefore configuration will be correctly enabled. This is also already done on other FPGA's, e.g. Stratix. Signed-off-by: Stephan Gatzka <stephan.gatzka@hbm.com> Signed-off-by: Stefan Roese <sr@denx.de>
-rw-r--r--drivers/fpga/cyclon2.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/fpga/cyclon2.c b/drivers/fpga/cyclon2.c
index 26494a3..0773e73 100644
--- a/drivers/fpga/cyclon2.c
+++ b/drivers/fpga/cyclon2.c
@@ -144,6 +144,8 @@ static int CYC2_ps_load(Altera_desc *desc, const void *buf, size_t bsize)
}
/* Establish the initial state */
+ (*fn->config) (FALSE, TRUE, cookie); /* De-assert nCONFIG */
+ udelay(100);
(*fn->config) (TRUE, TRUE, cookie); /* Assert nCONFIG */
udelay(2); /* T_cfg > 2us */