100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
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/*
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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/config.h>
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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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int mpc83xx_pci2_busno;
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#ifdef CONFIG_PCI
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int __init 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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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 = (int *) 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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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->set_cfg_type = 1;
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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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/* MPC83xx supports up to two host controllers one at 0x8500 from immrbar
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* the other at 0x8600, we consider the 0x8500 the primary controller
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*/
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/* PCI 1 */
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if ((rsrc.start & 0xfffff) == 0x8500) {
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setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304);
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}
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/* PCI 2*/
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if ((rsrc.start & 0xfffff) == 0x8600) {
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setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384);
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primary = 0;
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hose->bus_offset = hose->first_busno;
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mpc83xx_pci2_busno = hose->first_busno;
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}
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printk(KERN_INFO "Found MPC83xx PCI host bridge at 0x%08lx. "
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"Firmware bus number: %d->%d\n",
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rsrc.start, hose->first_busno, 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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