diff options
| author | Michał Żygowski <michal.zygowski@3mdeb.com> | 2018-07-05 16:53:44 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-07-10 09:53:22 +0000 |
| commit | 654a45d2ad55fe6ea0a99fb98dcaeaf5a06a04be (patch) | |
| tree | 22c2be45b0fe5c029d4c460d8c768f96935a62bc /src/southbridge/amd/pi/hudson | |
| parent | 209a1bf8cab6413d46399672c9ee402fc5971b54 (diff) | |
src/sb/amd/pi/hudson/sd.c: disable SDR50 tuning and set correct clock freq in SD2.0 mode
According to BKDG for AMD Family 16h Models 30h-3Fh Processors
SDR50 tuning should be disabled in 0xA8 register.
Also fix clock frequency setting in 0xA4 for stepping >= A1
which caused reduced performance of SD cards transfer speed
even by half.
Change-Id: I80ca754b0c89e08aa90ff885467c7486a3efb999
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Signed-off-by: Piotr Król <piotr.krol@3mdeb.com>
Reviewed-on: https://review.coreboot.org/27359
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/southbridge/amd/pi/hudson')
| -rw-r--r-- | src/southbridge/amd/pi/hudson/sd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/southbridge/amd/pi/hudson/sd.c b/src/southbridge/amd/pi/hudson/sd.c index a76ff92490..a87367fef5 100644 --- a/src/southbridge/amd/pi/hudson/sd.c +++ b/src/southbridge/amd/pi/hudson/sd.c @@ -43,7 +43,8 @@ static void sd_init(struct device *dev) pci_write_config32(dev, 0xD0, 0x0000058B); } else { /* Stepping >= A1 */ - pci_write_config32(dev, 0xA4, 0x31FE3FB2); + pci_write_config32(dev, 0xA4, 0x31FE32B2); + pci_write_config32(dev, 0xA8, 0x00000070); pci_write_config32(dev, 0xB0, 0x01180C19); pci_write_config32(dev, 0xD0, 0x0000078B); } |