diff options
| -rw-r--r-- | src/mainboard/siemens/mc_apl1/variants/mc_apl5/mainboard.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl5/mainboard.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl5/mainboard.c index 1e7fa37cf8..8eedce6d6c 100644 --- a/src/mainboard/siemens/mc_apl1/variants/mc_apl5/mainboard.c +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl5/mainboard.c @@ -13,6 +13,9 @@ #include <baseboard/variants.h> #include <types.h> +#define TX_DWORD3_P0 0xc8c +#define TX_SWING_MASK 0x00ff0000 + void variant_mainboard_final(void) { struct device *dev = NULL; @@ -32,6 +35,14 @@ void variant_mainboard_final(void) */ pcr_or32(PID_LPC, PCR_LPC_PRC, (PCR_LPC_CCE_EN | PCR_LPC_PCE_EN)); + /* + * Correct the SATA transmit signal via the High Speed I/O Transmit + * Control Register 3 on SATA port 0. + * Bit [23:16] sets the output voltage swing for TX line. + * The value 0x5a sets the swing level to 0.7 V. + */ + pcr_rmw32(PID_MODPHY, TX_DWORD3_P0, ~TX_SWING_MASK, 0x5a << 16); + /* Set Master Enable for on-board PCI device if allowed. */ dev = dev_find_device(PCI_VID_SIEMENS, 0x403e, 0); if (dev) { |