diff options
Diffstat (limited to 'src/soc/intel/broadwell/pcie.c')
| -rw-r--r-- | src/soc/intel/broadwell/pcie.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pcie.c b/src/soc/intel/broadwell/pcie.c index b14ad9dea0..fe22bccf63 100644 --- a/src/soc/intel/broadwell/pcie.c +++ b/src/soc/intel/broadwell/pcie.c @@ -123,6 +123,8 @@ static void pcie_iosf_port_grant_count(device_t dev) static void root_port_init_config(device_t dev) { int rp; + u32 data; + u8 resp, id; if (root_port_is_first(dev)) { rpc.orig_rpfn = RCBA32(RPFN); @@ -170,6 +172,15 @@ static void root_port_init_config(device_t dev) } pcie_update_cfg(dev, 0x418, 0, 0x02000430); + + /* set RP0 PCICFG E2h[5:4] = 11b before configuring ASPM */ + if (root_port_is_first(dev)) { + id = 0xe0 + (u8)(RCBA32(RPFN) & 0x07); + pch_iobp_exec(0xE00000E0, IOBP_PCICFG_READ, id, &data, &resp); + data |= (0x30 << 16); + pch_iobp_exec(0xE00000E0, IOBP_PCICFG_WRITE, id, &data, &resp); + } + /* Cache pci device. */ rpc.ports[rp - 1] = dev; } |