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dm: pci: Add a driver-model version of pci_find_device()

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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>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-11-29 13:17:50 -07:00
parent 5e23b8b4a4
commit 5c0bf647c4
2 changed files with 51 additions and 0 deletions
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39
drivers/pci/pci-uclass.c
View file

@ -195,6 +195,45 @@ int pci_find_device_id(struct pci_device_id *ids, int index,
return -ENODEV; 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, int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
unsigned long value, enum pci_size_t size) unsigned long value, enum pci_size_t size)
{ {

12
include/pci.h
View file

@ -1166,6 +1166,18 @@ struct udevice *pci_get_controller(struct udevice *dev);
int pci_get_regions(struct udevice *dev, struct pci_region **iop, int pci_get_regions(struct udevice *dev, struct pci_region **iop,
struct pci_region **memp, struct pci_region **prefp); struct pci_region **memp, struct pci_region **prefp);
/**
* 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 - PCI device emulator operations
*/ */