#include <dm/lists.h>
#include <dm/root.h>
#include <dm/device-internal.h>
+#if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
+#include <asm/fsp/fsp_support.h>
+#endif
DECLARE_GLOBAL_DATA_PTR;
+static int pci_get_bus(int busnum, struct udevice **busp)
+{
+ int ret;
+
+ ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp);
+
+ /* Since buses may not be numbered yet try a little harder with bus 0 */
+ if (ret == -ENODEV) {
+ ret = uclass_first_device(UCLASS_PCI, busp);
+ if (ret)
+ return ret;
+ else if (!*busp)
+ return -ENODEV;
+ ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, busp);
+ }
+
+ return ret;
+}
+
struct pci_controller *pci_bus_to_hose(int busnum)
{
struct udevice *bus;
int ret;
- ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus);
+ ret = pci_get_bus(busnum, &bus);
if (ret) {
debug("%s: Cannot get bus %d: ret=%d\n", __func__, busnum, ret);
return NULL;
}
+
return dev_get_uclass_priv(bus);
}
struct udevice *bus;
int ret;
- ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus);
+ ret = pci_get_bus(PCI_BUS(bdf), &bus);
if (ret)
return ret;
return pci_bus_find_devfn(bus, PCI_MASK_BUS(bdf), devp);
struct udevice *bus;
int ret;
- ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus);
+ ret = pci_get_bus(PCI_BUS(bdf), &bus);
if (ret)
return ret;
{
struct udevice *bus;
- for (bus = dev; device_get_uclass_id(bus->parent) == UCLASS_PCI;)
+ for (bus = dev; device_is_on_pci_bus(bus);)
bus = bus->parent;
return pci_bus_write_config(bus, pci_get_bdf(dev), offset, value, size);
}
struct udevice *bus;
int ret;
- ret = uclass_get_device_by_seq(UCLASS_PCI, PCI_BUS(bdf), &bus);
+ ret = pci_get_bus(PCI_BUS(bdf), &bus);
if (ret)
return ret;
{
struct udevice *bus;
- for (bus = dev; device_get_uclass_id(bus->parent) == UCLASS_PCI;)
+ for (bus = dev; device_is_on_pci_bus(bus);)
bus = bus->parent;
return pci_bus_read_config(bus, pci_get_bdf(dev), offset, valuep,
size);
int n_ents;
int ret;
char name[30], *str;
+ bool bridge;
*devp = NULL;
continue;
drv = entry->driver;
+
+ /*
+ * In the pre-relocation phase, we only bind devices
+ * whose driver has the DM_FLAG_PRE_RELOC set, to save
+ * precious memory space as on some platforms as that
+ * space is pretty limited (ie: using Cache As RAM).
+ */
+ if (!(gd->flags & GD_FLG_RELOC) &&
+ !(drv->flags & DM_FLAG_PRE_RELOC))
+ return 0;
+
/*
* We could pass the descriptor to the driver as
* platdata (instead of NULL) and allow its bind()
}
}
+ bridge = (find_id->class >> 8) == PCI_CLASS_BRIDGE_PCI;
+ /*
+ * In the pre-relocation phase, we only bind bridge devices to save
+ * precious memory space as on some platforms as that space is pretty
+ * limited (ie: using Cache As RAM).
+ */
+ if (!(gd->flags & GD_FLG_RELOC) && !bridge)
+ return 0;
+
/* Bind a generic driver so that the device can be used */
sprintf(name, "pci_%x:%x.%x", parent->seq, PCI_DEV(bdf),
PCI_FUNC(bdf));
str = strdup(name);
if (!str)
return -ENOMEM;
- drv = (find_id->class >> 8) == PCI_CLASS_BRIDGE_PCI ? "pci_bridge_drv" :
- "pci_generic_drv";
+ drv = bridge ? "pci_bridge_drv" : "pci_generic_drv";
+
ret = device_bind_driver(parent, drv, str, devp);
if (ret) {
debug("%s: Failed to bind generic driver: %d", __func__, ret);
return ret;
/* Update the platform data */
- pplat = dev_get_parent_platdata(dev);
- pplat->devfn = PCI_MASK_BUS(bdf);
- pplat->vendor = vendor;
- pplat->device = device;
- pplat->class = class;
+ if (dev) {
+ pplat = dev_get_parent_platdata(dev);
+ pplat->devfn = PCI_MASK_BUS(bdf);
+ pplat->vendor = vendor;
+ pplat->device = device;
+ pplat->class = class;
+ }
}
return 0;
static int pci_uclass_post_bind(struct udevice *bus)
{
+ /*
+ * If there is no pci device listed in the device tree,
+ * don't bother scanning the device tree.
+ */
+ if (bus->of_offset == -1)
+ return 0;
+
/*
* Scan the device tree for devices. This does not probe the PCI bus,
* as this is not permitted while binding. It just finds devices
ret = pci_auto_config_devices(bus);
#endif
+#if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP)
+ /*
+ * Per Intel FSP specification, we should call FSP notify API to
+ * inform FSP that PCI enumeration has been done so that FSP will
+ * do any necessary initialization as required by the chipset's
+ * BIOS Writer's Guide (BWG).
+ *
+ * Unfortunately we have to put this call here as with driver model,
+ * the enumeration is all done on a lazy basis as needed, so until
+ * something is touched on PCI it won't happen.
+ *
+ * Note we only call this 1) after U-Boot is relocated, and 2)
+ * root bus has finished probing.
+ */
+ if ((gd->flags & GD_FLG_RELOC) && (bus->seq == 0))
+ ret = fsp_init_phase_pci();
+#endif
+
return ret < 0 ? ret : 0;
}
if (ret != -ENOENT)
return -EINVAL;
} else {
- /* extract the bdf from fdt_pci_addr */
- pplat->devfn = addr.phys_hi & 0xffff00;
+ /* extract the devfn from fdt_pci_addr */
+ pplat->devfn = addr.phys_hi & 0xff00;
}
return 0;
return pci_bus_write_config(hose->ctlr, bdf, offset, value, size);
}
+static int skip_to_next_device(struct udevice *bus, struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret = 0;
+
+ /*
+ * Scan through all the PCI controllers. On x86 there will only be one
+ * but that is not necessarily true on other hardware.
+ */
+ do {
+ device_find_first_child(bus, &dev);
+ if (dev) {
+ *devp = dev;
+ return 0;
+ }
+ ret = uclass_next_device(&bus);
+ if (ret)
+ return ret;
+ } while (bus);
+
+ return 0;
+}
+
+int pci_find_next_device(struct udevice **devp)
+{
+ struct udevice *child = *devp;
+ struct udevice *bus = child->parent;
+ int ret;
+
+ /* First try all the siblings */
+ *devp = NULL;
+ while (child) {
+ device_find_next_child(&child);
+ if (child) {
+ *devp = child;
+ return 0;
+ }
+ }
+
+ /* We ran out of siblings. Try the next bus */
+ ret = uclass_next_device(&bus);
+ if (ret)
+ return ret;
+
+ return bus ? skip_to_next_device(bus, devp) : 0;
+}
+
+int pci_find_first_device(struct udevice **devp)
+{
+ struct udevice *bus;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_first_device(UCLASS_PCI, &bus);
+ if (ret)
+ return ret;
+
+ return skip_to_next_device(bus, devp);
+}
+
UCLASS_DRIVER(pci) = {
.id = UCLASS_PCI,
.name = "pci",
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