0a3786c5f7
Removed the remants of bus_offset and use self_busno in the mv64x60 case and use pci_assign_all_buses on 83xx/85xx. 83xx/85xx have multiple PHBs and the firmwares on these devices tend not to handle topologies with P2P bridges well so we let Linux just reassign the bus numbers to match. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
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* FSL SoC setup code
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*
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* Maintained by Kumar Gala (see MAINTAINERS for contact information)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <asm/system.h>
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#include <asm/atomic.h>
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#include <asm/io.h>
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#include <asm/pci-bridge.h>
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#include <asm/prom.h>
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#include <sysdev/fsl_soc.h>
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(x...) printk(x)
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#else
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#define DBG(x...)
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#endif
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#ifdef CONFIG_PCI
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int __init mpc85xx_add_bridge(struct device_node *dev)
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{
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int len;
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struct pci_controller *hose;
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struct resource rsrc;
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const int *bus_range;
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int primary = 1, has_address = 0;
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phys_addr_t immr = get_immrbase();
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DBG("Adding PCI host bridge %s\n", dev->full_name);
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/* Fetch host bridge registers address */
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has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
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/* Get bus range if any */
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bus_range = of_get_property(dev, "bus-range", &len);
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if (bus_range == NULL || len < 2 * sizeof(int)) {
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printk(KERN_WARNING "Can't get bus-range for %s, assume"
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" bus 0\n", dev->full_name);
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}
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pci_assign_all_buses = 1;
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hose = pcibios_alloc_controller();
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if (!hose)
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return -ENOMEM;
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hose->arch_data = dev;
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hose->first_busno = bus_range ? bus_range[0] : 0;
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hose->last_busno = bus_range ? bus_range[1] : 0xff;
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/* PCI 1 */
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if ((rsrc.start & 0xfffff) == 0x8000) {
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setup_indirect_pci(hose, immr + 0x8000, immr + 0x8004);
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}
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/* PCI 2 */
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if ((rsrc.start & 0xfffff) == 0x9000) {
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setup_indirect_pci(hose, immr + 0x9000, immr + 0x9004);
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primary = 0;
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}
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printk(KERN_INFO "Found MPC85xx PCI host bridge at 0x%016llx. "
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"Firmware bus number: %d->%d\n",
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(unsigned long long)rsrc.start, hose->first_busno,
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hose->last_busno);
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DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
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hose, hose->cfg_addr, hose->cfg_data);
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/* Interpret the "ranges" property */
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/* This also maps the I/O region and sets isa_io/mem_base */
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pci_process_bridge_OF_ranges(hose, dev, primary);
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return 0;
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}
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#endif
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