baytrail: add support for disabling south cluster pci devices
When the southcluster pci devices are listed in the devicetree add
the ability to perform the proper disabling sequence for turning
off devices. This only turns off the pci device interface as well
as put the device into D3Hot. It is not yet known how to put the TXE
device into D3Hot so it's currently not possible to disable that
device.
Also, expose the southcluster_enable_dev() function so that other
devices can call this if they require doing specific things before
disabling the device. The southcluster_enable_dev() is only called
on devices found in the devicetree and if they currently have no
ops associated with them.
BUG=chrome-os-partner:22871
BRANCH=None
TEST=Built and booted through depthcharge. Interrogated
output to ensure devices were being properly disabled.
Change-Id: I537ddcb9379907af2fe012948542b6150a8bf7c5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174644
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/4911
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/soc/intel/baytrail/chip.c b/src/soc/intel/baytrail/chip.c
index 0f686fa..eedae39 100644
--- a/src/soc/intel/baytrail/chip.c
+++ b/src/soc/intel/baytrail/chip.c
@@ -53,13 +53,17 @@
static void enable_dev(device_t dev)
{
- printk(BIOS_DEBUG, "enable_dev(%s, %d)\n",
- dev_name(dev), dev->path.type);
/* Set the operations if it is a special bus type */
if (dev->path.type == DEVICE_PATH_DOMAIN) {
dev->ops = &pci_domain_ops;
} else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
dev->ops = &cpu_bus_ops;
+ } else if (dev->path.type == DEVICE_PATH_PCI) {
+ /* Handle south cluster enablement. */
+ if (PCI_SLOT(dev->path.pci.devfn) > GFX_DEV &&
+ (dev->ops == NULL || dev->ops->enable == NULL)) {
+ southcluster_enable_dev(dev);
+ }
}
}