Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / arch / powerpc / platforms / 83xx / pci.c
blob14f1080c6c9d40c616eebbfbd37f0e26ead5b781
1 /*
2 * FSL SoC setup code
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/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/errno.h>
16 #include <linux/pci.h>
17 #include <linux/delay.h>
18 #include <linux/irq.h>
19 #include <linux/module.h>
21 #include <asm/system.h>
22 #include <asm/atomic.h>
23 #include <asm/io.h>
24 #include <asm/pci-bridge.h>
25 #include <asm/prom.h>
26 #include <sysdev/fsl_soc.h>
28 #undef DEBUG
30 #ifdef DEBUG
31 #define DBG(x...) printk(x)
32 #else
33 #define DBG(x...)
34 #endif
36 int __init mpc83xx_add_bridge(struct device_node *dev)
38 int len;
39 struct pci_controller *hose;
40 struct resource rsrc;
41 const int *bus_range;
42 int primary = 1, has_address = 0;
43 phys_addr_t immr = get_immrbase();
45 DBG("Adding PCI host bridge %s\n", dev->full_name);
47 /* Fetch host bridge registers address */
48 has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
50 /* Get bus range if any */
51 bus_range = of_get_property(dev, "bus-range", &len);
52 if (bus_range == NULL || len < 2 * sizeof(int)) {
53 printk(KERN_WARNING "Can't get bus-range for %s, assume"
54 " bus 0\n", dev->full_name);
57 ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
58 hose = pcibios_alloc_controller(dev);
59 if (!hose)
60 return -ENOMEM;
62 hose->first_busno = bus_range ? bus_range[0] : 0;
63 hose->last_busno = bus_range ? bus_range[1] : 0xff;
65 /* MPC83xx supports up to two host controllers one at 0x8500 from immrbar
66 * the other at 0x8600, we consider the 0x8500 the primary controller
68 /* PCI 1 */
69 if ((rsrc.start & 0xfffff) == 0x8500) {
70 setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304, 0);
72 /* PCI 2 */
73 if ((rsrc.start & 0xfffff) == 0x8600) {
74 setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384, 0);
75 primary = 0;
78 printk(KERN_INFO "Found MPC83xx PCI host bridge at 0x%016llx. "
79 "Firmware bus number: %d->%d\n",
80 (unsigned long long)rsrc.start, hose->first_busno,
81 hose->last_busno);
83 DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
84 hose, hose->cfg_addr, hose->cfg_data);
86 /* Interpret the "ranges" property */
87 /* This also maps the I/O region and sets isa_io/mem_base */
88 pci_process_bridge_OF_ranges(hose, dev, primary);
90 return 0;