Merge tag 'u-boot-imx-20191009' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

[oweals/u-boot.git] / drivers / pci / pci-uclass.c

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 389aec15ce7b6ece8c0d608a0d9acf5454394b31..896cb6b23a1a23516fd5b6664b5bf62dd3654beb 100644 (file)
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -790,7 +790,7 @@ int pci_bind_bus_devices(struct udevice *bus)
                if (!PCI_FUNC(bdf))
                        found_multi = header_type & 0x80;
 
-               debug("%s: bus %d/%s: found device %x, function %d\n", __func__,
+               debug("%s: bus %d/%s: found device %x, function %d", __func__,
                      bus->seq, bus->name, PCI_DEV(bdf), PCI_FUNC(bdf));
                pci_bus_read_config(bus, bdf, PCI_DEVICE_ID, &device,
                                    PCI_SIZE_16);
@@ -800,6 +800,7 @@ int pci_bind_bus_devices(struct udevice *bus)
 
                /* Find this device in the device tree */
                ret = pci_bus_find_devfn(bus, PCI_MASK_BUS(bdf), &dev);
+               debug(": find ret=%d\n", ret);
 
                /* If nothing in the device tree, bind a device */
                if (ret == -ENODEV) {
@@ -982,7 +983,7 @@ static int pci_uclass_post_probe(struct udevice *bus)
        if (ret)
                return ret;
 
-#ifdef CONFIG_PCI_PNP
+#if CONFIG_IS_ENABLED(PCI_PNP)
        ret = pci_auto_config_devices(bus);
        if (ret < 0)
                return ret;
@@ -1494,6 +1495,30 @@ int dm_pci_find_ext_capability(struct udevice *dev, int cap)
        return dm_pci_find_next_ext_capability(dev, 0, cap);
 }
 
+int dm_pci_flr(struct udevice *dev)
+{
+       int pcie_off;
+       u32 cap;
+
+       /* look for PCI Express Capability */
+       pcie_off = dm_pci_find_capability(dev, PCI_CAP_ID_EXP);
+       if (!pcie_off)
+               return -ENOENT;
+
+       /* check FLR capability */
+       dm_pci_read_config32(dev, pcie_off + PCI_EXP_DEVCAP, &cap);
+       if (!(cap & PCI_EXP_DEVCAP_FLR))
+               return -ENOENT;
+
+       dm_pci_clrset_config16(dev, pcie_off + PCI_EXP_DEVCTL, 0,
+                              PCI_EXP_DEVCTL_BCR_FLR);
+
+       /* wait 100ms, per PCI spec */
+       mdelay(100);
+
+       return 0;
+}
+
 UCLASS_DRIVER(pci) = {
        .id             = UCLASS_PCI,
        .name           = "pci",
@@ -1548,9 +1573,9 @@ void pci_init(void)
         * Enumerate all known controller devices. Enumeration has the side-
         * effect of probing them, so PCIe devices will be enumerated too.
         */
-       for (uclass_first_device(UCLASS_PCI, &bus);
+       for (uclass_first_device_check(UCLASS_PCI, &bus);
             bus;
-            uclass_next_device(&bus)) {
+            uclass_next_device_check(&bus)) {
                ;
        }
 }