diff options
| author | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2020-11-05 14:38:51 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-11-09 07:37:57 +0000 |
| commit | 8a1ad138225e5a31d75cd77b9d7f183f3ab6d39c (patch) | |
| tree | 01e84b019eea3089f0c5de58626624bd0dd34e87 /src/device/pci_ops.c | |
| parent | 3d4513e7c8e27dbb9c6b941c4eb4144d38ff5cee (diff) | |
device: Move pci_dev_is_wake_source function
Move this function to pci_ops.c, which is already included in the smm
build. This is required to use this function in elog functionality,
which is called from SMM.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Ie5583c04366c9a16bc1b00a6892d39eeafe5da49
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47260
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Diffstat (limited to 'src/device/pci_ops.c')
| -rw-r--r-- | src/device/pci_ops.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/device/pci_ops.c b/src/device/pci_ops.c index 90f45bf21a..aaa9f95fb1 100644 --- a/src/device/pci_ops.c +++ b/src/device/pci_ops.c @@ -78,3 +78,21 @@ void __noreturn pcidev_die(void) { die("PCI: dev is NULL!\n"); } + +bool pci_dev_is_wake_source(const struct device *dev) +{ + unsigned int pm_cap; + uint16_t pmcs; + + if (dev->path.type != DEVICE_PATH_PCI) + return false; + + pm_cap = pci_find_capability(dev, PCI_CAP_ID_PM); + if (!pm_cap) + return false; + + pmcs = pci_s_read_config16(PCI_BDF(dev), pm_cap + PCI_PM_CTRL); + + /* PCI Device is a wake source if PME_ENABLE and PME_STATUS are set in PMCS register. */ + return (pmcs & PCI_PM_CTRL_PME_ENABLE) && (pmcs & PCI_PM_CTRL_PME_STATUS); +} |