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authorKane Chen <kane.chen@intel.com>2017-10-05 10:17:07 +0800
committerAaron Durbin <adurbin@chromium.org>2017-10-12 02:45:41 +0000
commitf73bc0b2d103705a557142461d19496b59adda81 (patch)
tree55c5e9a92db40996ffe1f0305e46a538f4d12d8a
parent6754e4ea2008f67c0630fdac976456649a5ac95a (diff)
downloadcoreboot-f73bc0b2d103705a557142461d19496b59adda81.tar.xz
soc/intel/skylake: Enable bus master for sata
The bus master needs to be enabled so that the busy bit in AHCI PORT_TFDATA will be cleared by controller when depthcharge tries to wait for sata to complete spin-up during AHCI init. Otherwise, the timeout will happen and cause 5 seconds delay in depthcharge. BUG=b:37639063 BRANCH=none TEST=verify that the sata timeout is gone in depthcharge Change-Id: I19eadbb2943fda8a5babc82ca87b1ecaab5e2ed8 Signed-off-by: Kane Chen <kane.chen@intel.com> Reviewed-on: https://review.coreboot.org/21890 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
-rw-r--r--src/soc/intel/common/block/sata/sata.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/sata/sata.c b/src/soc/intel/common/block/sata/sata.c
index 5cacc95ce0..f3006569d3 100644
--- a/src/soc/intel/common/block/sata/sata.c
+++ b/src/soc/intel/common/block/sata/sata.c
@@ -45,6 +45,11 @@ static void sata_final(device_t dev)
u32 port_impl, temp;
dev = PCH_DEV_SATA;
+
+ /* Set Bus Master */
+ temp = pci_read_config32(dev, PCI_COMMAND);
+ pci_write_config32(dev, PCI_COMMAND, temp | PCI_COMMAND_MASTER);
+
/* Read Ports Implemented (GHC_PI) */
port_impl = read32(ahcibar + SATA_ABAR_PORT_IMPLEMENTED) & 0x07;
/* Port enable */