diff options
| author | Subrata Banik <subrata.banik@intel.com> | 2019-03-20 14:56:27 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-03-21 16:18:37 +0000 |
| commit | 9514d47d3c7296ff98bb7a590e36ee548b40e369 (patch) | |
| tree | 7f8546b0dd04741d573f0ae8bfdb8ba137de7274 /src/device/pci_device.c | |
| parent | 4a0f07166f0f0b6eb799e2670b47ce31d0cfc60b (diff) | |
device/pci_device: Add generic subsystem programming logic
This patch adds generic log to perform subsystem programming
based on header type.
Type 0: subsystem offset 0x2C
Type 2: subsystem offset 0x40
Type 1: Read CAP ID 0xD to know cap offset start, offset 4 to locate
subsystem vendor id.
Change-Id: Id8aed6dac24517e93cd55d6bb3b254b7b4d950d3
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31983
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: David Guckian
Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/device/pci_device.c')
| -rw-r--r-- | src/device/pci_device.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/src/device/pci_device.c b/src/device/pci_device.c index fbe9d9691b..5f908d2f68 100644 --- a/src/device/pci_device.c +++ b/src/device/pci_device.c @@ -734,11 +734,31 @@ void pci_bus_reset(struct bus *bus) void pci_dev_set_subsystem(struct device *dev, unsigned int vendor, unsigned int device) { + uint8_t offset; + + /* Header type */ + switch (dev->hdr_type & 0x7f) { + case PCI_HEADER_TYPE_NORMAL: + offset = PCI_SUBSYSTEM_VENDOR_ID; + break; + case PCI_HEADER_TYPE_BRIDGE: + offset = pci_find_capability(dev, PCI_CAP_ID_SSVID); + if (!offset) + return; + offset += 4; /* Vendor ID at offset 4 */ + break; + case PCI_HEADER_TYPE_CARDBUS: + offset = PCI_CB_SUBSYSTEM_VENDOR_ID; + break; + default: + return; + } + if (!vendor || !device) { - pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_write_config32(dev, offset, pci_read_config32(dev, PCI_VENDOR_ID)); } else { - pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_write_config32(dev, offset, ((device & 0xffff) << 16) | (vendor & 0xffff)); } } |