There is an existing function prototype in the header file but it is not implemented. Implement something similar.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Fix missing spaces (code style nit) - Add another comment in pci_find_class()
drivers/pci/pci.c | 43 +++++++++++++++++++++++++++++++++++++++++++ include/pci.h | 3 +-- 2 files changed, 44 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 950a247..0210e41 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -15,6 +15,7 @@ #include <common.h>
#include <command.h> +#include <errno.h> #include <asm/processor.h> #include <asm/io.h> #include <pci.h> @@ -236,6 +237,48 @@ pci_dev_t pci_find_devices(struct pci_device_id *ids, int index) return -1; }
+pci_dev_t pci_find_class(uint find_class, int index) +{ + int bus; + int devnum; + pci_dev_t bdf; + uint32_t class; + + for (bus = 0; bus <= pci_last_busno(); bus++) { + for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES - 1; devnum++) { + pci_read_config_dword(PCI_BDF(bus, devnum, 0), + PCI_CLASS_REVISION, &class); + if (class >> 16 == 0xffff) + continue; + + for (bdf = PCI_BDF(bus, devnum, 0); + bdf <= PCI_BDF(bus, devnum, + PCI_MAX_PCI_FUNCTIONS - 1); + bdf += PCI_BDF(0, 0, 1)) { + pci_read_config_dword(bdf, PCI_CLASS_REVISION, + &class); + class >>= 8; + + if (class != find_class) + continue; + /* + * Decrement the index. We want to return the + * correct device, so index is 0 for theh first + * matching device, 1 for the second, etc. + */ + if (index) { + index--; + continue; + } + /* Return index'th controller. */ + return bdf; + } + } + } + + return -ENODEV; +} + pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index) { struct pci_device_id ids[2] = { {}, {0, 0} }; diff --git a/include/pci.h b/include/pci.h index 4fbb8f6..004a048 100644 --- a/include/pci.h +++ b/include/pci.h @@ -644,8 +644,7 @@ extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int index); extern pci_dev_t pci_find_devices (struct pci_device_id *ids, int index); -extern pci_dev_t pci_find_class(int wanted_class, int wanted_sub_code, - int wanted_prog_if, int index); +pci_dev_t pci_find_class(unsigned int find_class, int index);
extern int pci_hose_config_device(struct pci_controller *hose, pci_dev_t dev,