2 #include <linux/kernel.h>
4 #include <linux/string.h>
5 #include <linux/init.h>
10 #include <asm/machdep.h>
11 #include <asm/sections.h>
12 #include <asm/pci-bridge.h>
19 * Access functions for PCI config space using RTAS calls.
21 static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
24 struct pci_controller *hose = bus->sysdata;
25 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
26 | (((bus->number - hose->first_busno) & 0xff) << 16)
27 | (hose->index << 24);
31 rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
33 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
36 static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
37 int offset, int len, u32 val)
39 struct pci_controller *hose = bus->sysdata;
40 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
41 | (((bus->number - hose->first_busno) & 0xff) << 16)
42 | (hose->index << 24);
45 rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
47 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
50 static struct pci_ops rtas_pci_ops = {
55 void __init efika_pcisetup(void)
59 struct pci_controller *hose;
60 struct device_node *root;
61 struct device_node *pcictrl;
63 root = of_find_node_by_path("/");
65 printk(KERN_WARNING EFIKA_PLATFORM_NAME
66 ": Unable to find the root node\n");
70 for (pcictrl = NULL;;) {
71 pcictrl = of_get_next_child(root, pcictrl);
72 if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0))
78 if (pcictrl == NULL) {
79 printk(KERN_WARNING EFIKA_PLATFORM_NAME
80 ": Unable to find the PCI bridge node\n");
84 bus_range = get_property(pcictrl, "bus-range", &len);
85 if (bus_range == NULL || len < 2 * sizeof(int)) {
86 printk(KERN_WARNING EFIKA_PLATFORM_NAME
87 ": Can't get bus-range for %s\n", pcictrl->full_name);
91 if (bus_range[1] == bus_range[0])
92 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
95 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
96 bus_range[0], bus_range[1]);
97 printk(" controlled by %s\n", pcictrl->full_name);
100 hose = pcibios_alloc_controller();
102 printk(KERN_WARNING EFIKA_PLATFORM_NAME
103 ": Can't allocate PCI controller structure for %s\n",
108 hose->arch_data = of_node_get(pcictrl);
109 hose->first_busno = bus_range[0];
110 hose->last_busno = bus_range[1];
111 hose->ops = &rtas_pci_ops;
113 pci_process_bridge_OF_ranges(hose, pcictrl, 0);
117 void __init efika_pcisetup(void)