sb600spi.c: Consolidate smbus dev revision derivation
V.2: Rename 'find_smbus_dev()' -> 'find_smbus_dev_rev()'.
Change-Id: I766b29cc1c7d01aa0bcf6cb9ff5ab73fa1995dcd
Signed-off-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/36420
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: Nico Huber <nico.h@gmx.de>
diff --git a/sb600spi.c b/sb600spi.c
index 3026836..6466795 100644
--- a/sb600spi.c
+++ b/sb600spi.c
@@ -80,6 +80,17 @@
.write_aai = default_spi_write_aai,
};
+static int find_smbus_dev_rev(uint16_t vendor, uint16_t device)
+{
+ struct pci_dev *smbus_dev = pci_dev_find(vendor, device);
+ if (!smbus_dev) {
+ msg_pdbg("No SMBus device with ID %04X:%04X found.\n", vendor, device);
+ msg_perr("ERROR: SMBus device not found. Not enabling SPI.\n");
+ return -1;
+ }
+ return pci_read_byte(smbus_dev, PCI_REVISION_ID);
+}
+
static void determine_generation(struct pci_dev *dev)
{
amd_gen = CHIPSET_AMD_UNKNOWN;
@@ -88,10 +99,9 @@
amd_gen = CHIPSET_SB6XX;
msg_pdbg("SB6xx detected.\n");
} else if (dev->device_id == 0x439d) {
- struct pci_dev *smbus_dev = pci_dev_find(0x1002, 0x4385);
- if (smbus_dev == NULL)
+ int rev = find_smbus_dev_rev(0x1002, 0x4385);
+ if (rev < 0)
return;
- uint8_t rev = pci_read_byte(smbus_dev, PCI_REVISION_ID);
if (rev >= 0x39 && rev <= 0x3D) {
amd_gen = CHIPSET_SB7XX;
msg_pdbg("SB7xx/SP5100 detected.\n");
@@ -123,12 +133,9 @@
msg_pdbg("not found. Assuming Hudson.\n");
amd_gen = CHIPSET_HUDSON234;
#else
- struct pci_dev *smbus_dev = pci_dev_find(0x1022, 0x780B);
- if (smbus_dev == NULL) {
- msg_pdbg("No SMBus device with ID 1022:780B found.\n");
+ int rev = find_smbus_dev_rev(0x1022, 0x780B);
+ if (rev < 0)
return;
- }
- uint8_t rev = pci_read_byte(smbus_dev, PCI_REVISION_ID);
if (rev >= 0x11 && rev <= 0x15) {
amd_gen = CHIPSET_HUDSON234;
msg_pdbg("Hudson-2/3/4 detected.\n");
@@ -144,12 +151,9 @@
"the output of lspci -nnvx, thanks!.\n", rev);
}
} else if (dev->device_id == 0x790e) {
- struct pci_dev *smbus_dev = pci_dev_find(0x1022, 0x790B);
- if (smbus_dev == NULL) {
- msg_pdbg("No SMBus device with ID 1022:790B found.\n");
+ int rev = find_smbus_dev_rev(0x1022, 0x790B);
+ if (rev < 0)
return;
- }
- uint8_t rev = pci_read_byte(smbus_dev, PCI_REVISION_ID);
if (rev == 0x4a) {
amd_gen = CHIPSET_YANGTZE;
msg_pdbg("Yangtze detected.\n");