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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - arch/powerpc/platforms/83xx/pci.c
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
);