apalis_imx6: unify sd/mmc drive strength with linux kernel settings

[oweals/u-boot.git] / include / pci.h

diff --git a/include/pci.h b/include/pci.h
index 938a8390cbfca66f8ca7683801f83a220c3a3e7b..5fb212cab1a9eada9b0bc9ca5b9fdd2ad1ca0ad3 100644 (file)
--- a/include/pci.h
+++ b/include/pci.h
@@ -499,9 +499,20 @@ static inline void pci_set_region(struct pci_region *reg,
 typedef int pci_dev_t;
 
 #define PCI_BUS(d)             (((d) >> 16) & 0xff)
+
+/*
+ * Please note the difference in DEVFN usage in U-Boot vs Linux. U-Boot
+ * uses DEVFN in bits 15-8 but Linux instead expects DEVFN in bits 7-0.
+ * Please see the Linux header include/uapi/linux/pci.h for more details.
+ * This is relevant for the following macros:
+ * PCI_DEV, PCI_FUNC, PCI_DEVFN
+ * The U-Boot macro PCI_DEV is equivalent to the Linux PCI_SLOT version with
+ * the remark from above (input d in bits 15-8 instead of 7-0.
+ */
 #define PCI_DEV(d)             (((d) >> 11) & 0x1f)
 #define PCI_FUNC(d)            (((d) >> 8) & 0x7)
 #define PCI_DEVFN(d, f)                ((d) << 11 | (f) << 8)
+
 #define PCI_MASK_BUS(bdf)      ((bdf) & 0xffff)
 #define PCI_ADD_BUS(bus, devfn)        (((bus) << 16) | (devfn))
 #define PCI_BDF(b, d, f)       ((b) << 16 | PCI_DEVFN(d, f))
@@ -735,12 +746,6 @@ extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int
 extern pci_dev_t pci_find_devices (struct pci_device_id *ids, 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,
-                                 unsigned long io,
-                                 pci_addr_t mem,
-                                 unsigned long command);
-
 extern int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
                                    int cap);
 extern int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
@@ -828,7 +833,7 @@ struct udevice;
  *
  * Every device on a PCI bus has this per-child data.
  *
- * It can be accessed using dev_get_parent_priv(dev) if dev->parent is a
+ * It can be accessed using dev_get_parent_platdata(dev) if dev->parent is a
  * PCI bus (i.e. UCLASS_PCI)
  *
  * @devfn:     Encoded device and function index - see PCI_DEVFN()
@@ -1312,6 +1317,29 @@ 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
  *
@@ -1334,6 +1362,31 @@ void *dm_pci_map_bar(struct udevice *dev, int bar, int flags);
  */
 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
  *
@@ -1512,6 +1565,16 @@ struct dm_pci_emul_ops {
 int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
                         struct udevice **containerp, struct udevice **emulp);
 
+/**
+ * pci_get_devfn() - Extract the devfn from fdt_pci_addr of the device
+ *
+ * Get devfn from fdt_pci_addr of the specifified device
+ *
+ * @dev:       PCI device
+ * @return devfn in bits 15...8 if found, -ENODEV if not found
+ */
+int pci_get_devfn(struct udevice *dev);
+
 #endif /* CONFIG_DM_PCI */
 
 /**