powerpc/fsl-pci Make PCIe hotplug work with Freescale PCIe controllers

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / include / asm / pci-bridge.h

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 025a130729bc4daab6c0ec812ec2bb7e14741468..ffbc5fd549acbb72bcab569612ea38d4dd0962cb 100644 (file)
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -70,6 +70,8 @@ struct pci_controller {
         *  BIG_ENDIAN - cfg_addr is a big endian register
         *  BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
         *   the PLB4.  Effectively disable MRM commands by setting this.
+        *  FSL_CFG_REG_LINK - Freescale controller version in which the PCIe
+        *   link status is in a RC PCIe cfg register (vs being a SoC register)
         */
 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE         0x00000001
 #define PPC_INDIRECT_TYPE_EXT_REG              0x00000002
@@ -77,6 +79,7 @@ struct pci_controller {
 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK         0x00000008
 #define PPC_INDIRECT_TYPE_BIG_ENDIAN           0x00000010
 #define PPC_INDIRECT_TYPE_BROKEN_MRM           0x00000020
+#define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK     0x00000040
        u32 indirect_type;
        /* Currently, we limit ourselves to 1 IO range and 3 mem
         * ranges since the common pci_bus structure can't handle more
@@ -90,9 +93,9 @@ struct pci_controller {
 
 #ifdef CONFIG_PPC64
        unsigned long buid;
+#endif /* CONFIG_PPC64 */
 
        void *private_data;
-#endif /* CONFIG_PPC64 */
 };
 
 /* These are used for config access before all the PCI probing
@@ -117,6 +120,12 @@ extern void setup_indirect_pci(struct pci_controller* hose,
                               resource_size_t cfg_addr,
                               resource_size_t cfg_data, u32 flags);
 
+extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
+                               int offset, int len, u32 *val);
+
+extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
+                                int offset, int len, u32 val);
+
 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 {
        return bus->sysdata;