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| author | Kenji Chen <kenji.chen@intel.com> | 2014-10-04 02:59:06 +0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-04-10 19:24:16 +0200 |
| commit | e8f366474a05c143bae05a16e4c67609f8dee429 (patch) | |
| tree | 3b37c24b68f44984a9a8c3905495e0d3bc316ced /src/soc/intel/broadwell/pcie.c | |
| parent | e86ac7e942ae9f439093cf00e979dd976e761d01 (diff) | |
| download | coreboot-e8f366474a05c143bae05a16e4c67609f8dee429.tar.xz | |
Broadwell: Synchronization with FRC for Root Port Power Management
BUG=chrome-os-partner:31424
TEST=Build a image and run on Samus proto boards to confirm if the
settings are applied correctly.
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Change-Id: I9147da86ce26ce7ef1c7034bc3dde0b27b63befa
Original-Commit-Id: 1717505a3fdf41c5972b1c929872577247f9e3b5
Original-Signed-off-by: Kenji Chen <kenji.chen@intel.com>
Original-Change-Id: I8138507506771148420a585fd12897a3bfe91916
Original-Reviewed-on: https://chromium-review.googlesource.com/221387
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9463
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/soc/intel/broadwell/pcie.c')
| -rw-r--r-- | src/soc/intel/broadwell/pcie.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/soc/intel/broadwell/pcie.c b/src/soc/intel/broadwell/pcie.c index c1aa9103c8..bb237be21f 100644 --- a/src/soc/intel/broadwell/pcie.c +++ b/src/soc/intel/broadwell/pcie.c @@ -173,11 +173,14 @@ 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)) { + /* + * set RP0 PCICFG E2h[5:4] = 11b and E1h[6] = 1 + * before configuring ASPM + */ id = 0xe0 + (u8)(RCBA32(RPFN) & 0x07); pch_iobp_exec(0xE00000E0, IOBP_PCICFG_READ, id, &data, &resp); - data |= (0x30 << 16); + data |= ((0x30 << 16) | (0x40 << 8)); pch_iobp_exec(0xE00000E0, IOBP_PCICFG_WRITE, id, &data, &resp); } @@ -265,7 +268,11 @@ static void pcie_enable_clock_gating(void) } /* Per-Port CLKREQ# handling. */ if (gpio_is_native(18 + rp - 1)) - pcie_update_cfg(dev, 0x420, ~0, (3 << 29)); + /* + * In addition to D28Fx PCICFG 420h[30:29] = 11b, + * set 420h[17] = 0b and 420[0] = 1b for L1 SubState. + */ + pcie_update_cfg(dev, 0x420, ~0x20000, (3 << 29) | 1); /* Configure shared resource clock gating. */ if (rp == 1 || rp == 5 || rp == 6) |