On Tue, Nov 17, 2015 at 11:53 AM, Simon Glass sjg@chromium.org wrote:
Add a function which scans the driver model device information rather than scanning the PCI bus again.
Signed-off-by: Simon Glass sjg@chromium.org
drivers/pci/pci-uclass.c | 39 +++++++++++++++++++++++++++++++++++++++ include/pci.h | 12 ++++++++++++ 2 files changed, 51 insertions(+)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 8087e2d..6376e43 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -194,6 +194,45 @@ int pci_find_device_id(struct pci_device_id *ids, int index, return -ENODEV; }
+static int dm_pci_bus_find_device(struct udevice *bus, unsigned int vendor,
unsigned int device, int *indexp,struct udevice **devp)+{
struct pci_child_platdata *pplat;struct udevice *dev;for (device_find_first_child(bus, &dev);dev;device_find_next_child(&dev)) {pplat = dev_get_parent_platdata(dev);if (pplat->vendor == vendor && pplat->device == device) {if (!(*indexp)--) {*devp = dev;return 0;}}}return -ENODEV;+}
+int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
struct udevice **devp)+{
struct udevice *bus;/* Scan all known buses */for (uclass_first_device(UCLASS_PCI, &bus);bus;uclass_next_device(&bus)) {if (!dm_pci_bus_find_device(bus, vendor, device, &index, devp))return device_probe(*devp);}*devp = NULL;return -ENODEV;+}
int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset, unsigned long value, enum pci_size_t size) { diff --git a/include/pci.h b/include/pci.h index 8d56fdd..f29804f 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1174,6 +1174,18 @@ int dm_pciauto_config_device(struct udevice *dev); void dm_pciauto_region_init(struct pci_region *res);
/**
- dm_pci_find_device() - find a device by vendor/device ID
- @vendor: Vendor ID
- @device: Device ID
- @index: 0 to find the first match, 1 for second, etc.
- @devp: Returns pointer to the device, if found
- @return 0 if found, -ve on error
- */
+int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
struct udevice **devp);+/**
- struct dm_pci_emul_ops - PCI device emulator operations
*/ struct dm_pci_emul_ops { --
Reviewed-by: Bin Meng bmeng.cn@gmail.com