Merge tag 'dm-pull-5dec18' of git://git.denx.de/u-boot-dm

[platform/kernel/u-boot.git] / include / pci.h

diff --git a/include/pci.h b/include/pci.h
index 83a40a5..785d7d2 100644 (file)
--- a/include/pci.h
+++ b/include/pci.h
@@ -17,6 +17,7 @@
  * Under PCI, each device has 256 bytes of configuration address space,
  * of which the first 64 bytes are standardized as follows:
  */
+#define PCI_STD_HEADER_SIZEOF  64
 #define PCI_VENDOR_ID          0x00    /* 16 bits */
 #define PCI_DEVICE_ID          0x02    /* 16 bits */
 #define PCI_COMMAND            0x04    /* 16 bits */
@@ -1311,6 +1312,99 @@ pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr,
  */
 void *dm_pci_map_bar(struct udevice *dev, int bar, int flags);
 
+/**
+ * dm_pci_find_next_capability() - find a capability starting from an offset
+ *
+ * Tell if a device supports a given PCI capability. Returns the
+ * address of the requested capability structure within the device's
+ * PCI configuration space or 0 in case the device does not support it.
+ *
+ * Possible values for @cap:
+ *
+ *  %PCI_CAP_ID_MSI    Message Signalled Interrupts
+ *  %PCI_CAP_ID_PCIX   PCI-X
+ *  %PCI_CAP_ID_EXP    PCI Express
+ *  %PCI_CAP_ID_MSIX   MSI-X
+ *
+ * See PCI_CAP_ID_xxx for the complete capability ID codes.
+ *
+ * @dev:       PCI device to query
+ * @start:     offset to start from
+ * @cap:       capability code
+ * @return:    capability address or 0 if not supported
+ */
+int dm_pci_find_next_capability(struct udevice *dev, u8 start, int cap);
+
+/**
+ * dm_pci_find_capability() - find a capability
+ *
+ * Tell if a device supports a given PCI capability. Returns the
+ * address of the requested capability structure within the device's
+ * PCI configuration space or 0 in case the device does not support it.
+ *
+ * Possible values for @cap:
+ *
+ *  %PCI_CAP_ID_MSI    Message Signalled Interrupts
+ *  %PCI_CAP_ID_PCIX   PCI-X
+ *  %PCI_CAP_ID_EXP    PCI Express
+ *  %PCI_CAP_ID_MSIX   MSI-X
+ *
+ * See PCI_CAP_ID_xxx for the complete capability ID codes.
+ *
+ * @dev:       PCI device to query
+ * @cap:       capability code
+ * @return:    capability address or 0 if not supported
+ */
+int dm_pci_find_capability(struct udevice *dev, int cap);
+
+/**
+ * dm_pci_find_next_ext_capability() - find an extended capability
+ *                                    starting from an offset
+ *
+ * Tell if a device supports a given PCI express extended capability.
+ * Returns the address of the requested extended capability structure
+ * within the device's PCI configuration space or 0 in case the device
+ * does not support it.
+ *
+ * Possible values for @cap:
+ *
+ *  %PCI_EXT_CAP_ID_ERR        Advanced Error Reporting
+ *  %PCI_EXT_CAP_ID_VC Virtual Channel
+ *  %PCI_EXT_CAP_ID_DSN        Device Serial Number
+ *  %PCI_EXT_CAP_ID_PWR        Power Budgeting
+ *
+ * See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
+ *
+ * @dev:       PCI device to query
+ * @start:     offset to start from
+ * @cap:       extended capability code
+ * @return:    extended capability address or 0 if not supported
+ */
+int dm_pci_find_next_ext_capability(struct udevice *dev, int start, int cap);
+
+/**
+ * dm_pci_find_ext_capability() - find an extended capability
+ *
+ * Tell if a device supports a given PCI express extended capability.
+ * Returns the address of the requested extended capability structure
+ * within the device's PCI configuration space or 0 in case the device
+ * does not support it.
+ *
+ * Possible values for @cap:
+ *
+ *  %PCI_EXT_CAP_ID_ERR        Advanced Error Reporting
+ *  %PCI_EXT_CAP_ID_VC Virtual Channel
+ *  %PCI_EXT_CAP_ID_DSN        Device Serial Number
+ *  %PCI_EXT_CAP_ID_PWR        Power Budgeting
+ *
+ * See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
+ *
+ * @dev:       PCI device to query
+ * @cap:       extended capability code
+ * @return:    extended capability address or 0 if not supported
+ */
+int dm_pci_find_ext_capability(struct udevice *dev, int cap);
+
 #define dm_pci_virt_to_bus(dev, addr, flags) \
        dm_pci_phys_to_bus(dev, (virt_to_phys(addr)), (flags))
 #define dm_pci_bus_to_virt(dev, addr, flags, len, map_flags) \