Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / kernel / of_platform.c

diff --git a/kernel/arch/powerpc/kernel/of_platform.c b/kernel/arch/powerpc/kernel/of_platform.c
new file mode 100644 (file)
index 0000000..b60a67d
--- /dev/null
+++ b/kernel/arch/powerpc/kernel/of_platform.c
@@ -0,0 +1,124 @@
+/*
+ *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
+ *                      <benh@kernel.crashing.org>
+ *    and               Arnd Bergmann, IBM Corp.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+#undef DEBUG
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pci.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/atomic.h>
+
+#include <asm/errno.h>
+#include <asm/topology.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc-pci.h>
+#include <asm/eeh.h>
+
+#ifdef CONFIG_PPC_OF_PLATFORM_PCI
+
+/* The probing of PCI controllers from of_platform is currently
+ * 64 bits only, mostly due to gratuitous differences between
+ * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
+ * lacking some bits needed here.
+ */
+
+static int of_pci_phb_probe(struct platform_device *dev)
+{
+       struct pci_controller *phb;
+
+       /* Check if we can do that ... */
+       if (ppc_md.pci_setup_phb == NULL)
+               return -ENODEV;
+
+       pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
+
+       /* Alloc and setup PHB data structure */
+       phb = pcibios_alloc_controller(dev->dev.of_node);
+       if (!phb)
+               return -ENODEV;
+
+       /* Setup parent in sysfs */
+       phb->parent = &dev->dev;
+
+       /* Setup the PHB using arch provided callback */
+       if (ppc_md.pci_setup_phb(phb)) {
+               pcibios_free_controller(phb);
+               return -ENODEV;
+       }
+
+       /* Process "ranges" property */
+       pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
+
+       /* Init pci_dn data structures */
+       pci_devs_phb_init_dynamic(phb);
+
+       /* Create EEH devices for the PHB */
+       eeh_dev_phb_init_dynamic(phb);
+
+       /* Register devices with EEH */
+       if (dev->dev.of_node->child)
+               eeh_add_device_tree_early(PCI_DN(dev->dev.of_node));
+
+       /* Scan the bus */
+       pcibios_scan_phb(phb);
+       if (phb->bus == NULL)
+               return -ENXIO;
+
+       /* Claim resources. This might need some rework as well depending
+        * whether we are doing probe-only or not, like assigning unassigned
+        * resources etc...
+        */
+       pcibios_claim_one_bus(phb->bus);
+
+       /* Finish EEH setup */
+       eeh_add_device_tree_late(phb->bus);
+
+       /* Add probed PCI devices to the device model */
+       pci_bus_add_devices(phb->bus);
+
+       /* sysfs files should only be added after devices are added */
+       eeh_add_sysfs_files(phb->bus);
+
+       return 0;
+}
+
+static const struct of_device_id of_pci_phb_ids[] = {
+       { .type = "pci", },
+       { .type = "pcix", },
+       { .type = "pcie", },
+       { .type = "pciex", },
+       { .type = "ht", },
+       {}
+};
+
+static struct platform_driver of_pci_phb_driver = {
+       .probe = of_pci_phb_probe,
+       .driver = {
+               .name = "of-pci",
+               .of_match_table = of_pci_phb_ids,
+       },
+};
+
+static __init int of_pci_phb_init(void)
+{
+       return platform_driver_register(&of_pci_phb_driver);
+}
+
+device_initcall(of_pci_phb_init);
+
+#endif /* CONFIG_PPC_OF_PLATFORM_PCI */