4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
12 #include <linux/config.h>
13 #include <linux/stddef.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/pci.h>
18 #include <linux/delay.h>
19 #include <linux/irq.h>
20 #include <linux/module.h>
22 #include <asm/system.h>
23 #include <asm/atomic.h>
25 #include <asm/pci-bridge.h>
27 #include <sysdev/fsl_soc.h>
32 #define DBG(x...) printk(x)
37 int mpc83xx_pci2_busno;
39 int mpc83xx_exclude_device(u_char bus, u_char devfn)
41 if (bus == 0 && PCI_SLOT(devfn) == 0)
42 return PCIBIOS_DEVICE_NOT_FOUND;
43 if (mpc83xx_pci2_busno)
44 if (bus == (mpc83xx_pci2_busno) && PCI_SLOT(devfn) == 0)
45 return PCIBIOS_DEVICE_NOT_FOUND;
46 return PCIBIOS_SUCCESSFUL;
49 int __init add_bridge(struct device_node *dev)
52 struct pci_controller *hose;
55 int primary = 1, has_address = 0;
56 phys_addr_t immr = get_immrbase();
58 DBG("Adding PCI host bridge %s\n", dev->full_name);
60 /* Fetch host bridge registers address */
61 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
63 /* Get bus range if any */
64 bus_range = (int *)get_property(dev, "bus-range", &len);
65 if (bus_range == NULL || len < 2 * sizeof(int)) {
66 printk(KERN_WARNING "Can't get bus-range for %s, assume"
67 " bus 0\n", dev->full_name);
70 hose = pcibios_alloc_controller();
73 hose->arch_data = dev;
74 hose->set_cfg_type = 1;
76 hose->first_busno = bus_range ? bus_range[0] : 0;
77 hose->last_busno = bus_range ? bus_range[1] : 0xff;
79 /* MPC83xx supports up to two host controllers one at 0x8500 from immrbar
80 * the other at 0x8600, we consider the 0x8500 the primary controller
83 if ((rsrc.start & 0xfffff) == 0x8500) {
84 setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304);
87 if ((rsrc.start & 0xfffff) == 0x8600) {
88 setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384);
90 hose->bus_offset = hose->first_busno;
91 mpc83xx_pci2_busno = hose->first_busno;
94 printk(KERN_INFO "Found MPC83xx PCI host bridge at 0x%08lx. "
95 "Firmware bus number: %d->%d\n",
96 rsrc.start, hose->first_busno, hose->last_busno);
98 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
99 hose, hose->cfg_addr, hose->cfg_data);
101 /* Interpret the "ranges" property */
102 /* This also maps the I/O region and sets isa_io/mem_base */
103 pci_process_bridge_OF_ranges(hose, dev, primary);