diff options
Diffstat (limited to 'drivers/pci/pci-uclass.c')
| -rw-r--r-- | drivers/pci/pci-uclass.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index b25298fb5e..ea70853da2 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -20,16 +20,36 @@ DECLARE_GLOBAL_DATA_PTR; +static int pci_get_bus(int busnum, struct udevice **busp) +{ + int ret; + + ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp); + + /* Since buses may not be numbered yet try a little harder with bus 0 */ + if (ret == -ENODEV) { + ret = uclass_first_device(UCLASS_PCI, busp); + if (ret) + return ret; + else if (!*busp) + return -ENODEV; + ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp); + } + + return ret; +} + struct pci_controller *pci_bus_to_hose(int busnum) { struct udevice *bus; int ret; - ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus); + ret = pci_get_bus(busnum, &bus); if (ret) { debug("%s: Cannot get bus %d: ret=%d\n", __func__, busnum, ret); return NULL; } + return dev_get_uclass_priv(bus); } @@ -128,7 +148,7 @@ int pci_bus_find_bdf(pci_dev_t bdf, struct udevice **devp) struct udevice *bus; int ret; - ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus); + ret = pci_get_bus(PCI_BUS(bdf), &bus); if (ret) return ret; return pci_bus_find_devfn(bus, PCI_MASK_BUS(bdf), devp); @@ -206,7 +226,7 @@ int pci_write_config(pci_dev_t bdf, int offset, unsigned long value, struct udevice *bus; int ret; - ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus); + ret = pci_get_bus(PCI_BUS(bdf), &bus); if (ret) return ret; @@ -271,7 +291,7 @@ int pci_read_config(pci_dev_t bdf, int offset, unsigned long *valuep, struct udevice *bus; int ret; - ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus); + ret = pci_get_bus(PCI_BUS(bdf), &bus); if (ret) return ret; |