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-rw-r--r--src/soc/intel/baytrail/baytrail/pcie.h2
-rw-r--r--src/soc/intel/baytrail/pcie.c39
2 files changed, 38 insertions, 3 deletions
diff --git a/src/soc/intel/baytrail/baytrail/pcie.h b/src/soc/intel/baytrail/baytrail/pcie.h
index f76d3da332..92ca3c8d7f 100644
--- a/src/soc/intel/baytrail/baytrail/pcie.h
+++ b/src/soc/intel/baytrail/baytrail/pcie.h
@@ -98,5 +98,5 @@
#define PHYCTL4 0x408
# define SQDIS (1 << 27)
-
+#define PCIE_ROOT_PORT_COUNT 4
#endif /* _BAYTRAIL_PCIE_H_ */
diff --git a/src/soc/intel/baytrail/pcie.c b/src/soc/intel/baytrail/pcie.c
index 71b90ded47..f80a494a0b 100644
--- a/src/soc/intel/baytrail/pcie.c
+++ b/src/soc/intel/baytrail/pcie.c
@@ -155,6 +155,35 @@ static void check_port_enabled(device_t dev)
}
}
+static u8 all_ports_no_dev_present(device_t dev)
+{
+ u8 func;
+ u8 temp = dev->path.pci.devfn;
+ u8 device_not_present = 1;
+ u8 data;
+
+ for (func = 1; func < PCIE_ROOT_PORT_COUNT; func++) {
+ dev->path.pci.devfn &= ~0x7;
+ dev->path.pci.devfn |= func;
+
+ /* is pcie device there */
+ if (pci_read_config32(dev, 0) == 0xFFFFFFFF)
+ continue;
+
+ data = pci_read_config8(dev, XCAP + 3) | (SI >> 24);
+ pci_write_config8(dev, XCAP + 3, data);
+
+ /* is any device present */
+ if ((pci_read_config32(dev, SLCTL_SLSTS) & PDS)) {
+ device_not_present = 0;
+ break;
+ }
+ }
+
+ dev->path.pci.devfn = temp;
+ return device_not_present;
+}
+
static void check_device_present(device_t dev)
{
/* Set slot implemented. */
@@ -163,8 +192,14 @@ static void check_device_present(device_t dev)
/* No device present. */
if (!(pci_read_config32(dev, SLCTL_SLSTS) & PDS)) {
printk(BIOS_DEBUG, "No PCIe device present.\n");
- reg_script_run_on_dev(dev, no_dev_behind_port);
- dev->enabled = 0;
+ if (is_first_port(dev)) {
+ if (all_ports_no_dev_present(dev)) {
+ reg_script_run_on_dev(dev, no_dev_behind_port);
+ dev->enabled = 0;
+ }
+ } else {
+ dev->enabled = 0;
+ }
} else if(!dev->enabled) {
/* Port is disabled, but device present. Disable link. */
pci_write_config32(dev, LCTL,