mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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399fe2bdd3
... for consistency with ppc64 and to make merging easier. Signed-off-by: Paul Mackerras <paulus@samba.org>
1125 lines
32 KiB
C
1125 lines
32 KiB
C
/*
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* Support for PCI bridges found on Power Macintoshes.
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* At present the "bandit" and "chaos" bridges are supported.
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* Fortunately you access configuration space in the same
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* way with either bridge.
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*
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* Copyright (C) 1997 Paul Mackerras (paulus@cs.anu.edu.au)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <asm/sections.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/pci-bridge.h>
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#include <asm/machdep.h>
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#include <asm/pmac_feature.h>
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#undef DEBUG
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#ifdef DEBUG
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#ifdef CONFIG_XMON
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extern void xmon_printf(const char *fmt, ...);
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#define DBG(x...) xmon_printf(x)
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#else
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#define DBG(x...) printk(x)
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#endif
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#else
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#define DBG(x...)
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#endif
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static int add_bridge(struct device_node *dev);
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extern void pmac_check_ht_link(void);
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/* XXX Could be per-controller, but I don't think we risk anything by
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* assuming we won't have both UniNorth and Bandit */
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static int has_uninorth;
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#ifdef CONFIG_POWER4
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static struct pci_controller *u3_agp;
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#endif /* CONFIG_POWER4 */
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extern u8 pci_cache_line_size;
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extern int pcibios_assign_bus_offset;
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struct device_node *k2_skiplist[2];
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/*
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* Magic constants for enabling cache coherency in the bandit/PSX bridge.
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*/
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#define BANDIT_DEVID_2 8
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#define BANDIT_REVID 3
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#define BANDIT_DEVNUM 11
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#define BANDIT_MAGIC 0x50
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#define BANDIT_COHERENT 0x40
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static int __init
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fixup_one_level_bus_range(struct device_node *node, int higher)
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{
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for (; node != 0;node = node->sibling) {
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int * bus_range;
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unsigned int *class_code;
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int len;
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/* For PCI<->PCI bridges or CardBus bridges, we go down */
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class_code = (unsigned int *) get_property(node, "class-code", NULL);
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if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
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(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
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continue;
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bus_range = (int *) get_property(node, "bus-range", &len);
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if (bus_range != NULL && len > 2 * sizeof(int)) {
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if (bus_range[1] > higher)
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higher = bus_range[1];
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}
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higher = fixup_one_level_bus_range(node->child, higher);
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}
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return higher;
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}
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/* This routine fixes the "bus-range" property of all bridges in the
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* system since they tend to have their "last" member wrong on macs
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*
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* Note that the bus numbers manipulated here are OF bus numbers, they
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* are not Linux bus numbers.
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*/
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static void __init
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fixup_bus_range(struct device_node *bridge)
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{
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int * bus_range;
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int len;
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/* Lookup the "bus-range" property for the hose */
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bus_range = (int *) get_property(bridge, "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\n",
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bridge->full_name);
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return;
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}
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bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
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}
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/*
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* Apple MacRISC (U3, UniNorth, Bandit, Chaos) PCI controllers.
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*
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* The "Bandit" version is present in all early PCI PowerMacs,
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* and up to the first ones using Grackle. Some machines may
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* have 2 bandit controllers (2 PCI busses).
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*
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* "Chaos" is used in some "Bandit"-type machines as a bridge
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* for the separate display bus. It is accessed the same
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* way as bandit, but cannot be probed for devices. It therefore
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* has its own config access functions.
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*
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* The "UniNorth" version is present in all Core99 machines
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* (iBook, G4, new IMacs, and all the recent Apple machines).
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* It contains 3 controllers in one ASIC.
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*
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* The U3 is the bridge used on G5 machines. It contains an
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* AGP bus which is dealt with the old UniNorth access routines
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* and a HyperTransport bus which uses its own set of access
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* functions.
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*/
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#define MACRISC_CFA0(devfn, off) \
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((1 << (unsigned long)PCI_SLOT(dev_fn)) \
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| (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
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| (((unsigned long)(off)) & 0xFCUL))
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#define MACRISC_CFA1(bus, devfn, off) \
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((((unsigned long)(bus)) << 16) \
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|(((unsigned long)(devfn)) << 8) \
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|(((unsigned long)(off)) & 0xFCUL) \
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|1UL)
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static void volatile __iomem *
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macrisc_cfg_access(struct pci_controller* hose, u8 bus, u8 dev_fn, u8 offset)
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{
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unsigned int caddr;
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if (bus == hose->first_busno) {
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if (dev_fn < (11 << 3))
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return NULL;
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caddr = MACRISC_CFA0(dev_fn, offset);
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} else
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caddr = MACRISC_CFA1(bus, dev_fn, offset);
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/* Uninorth will return garbage if we don't read back the value ! */
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do {
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out_le32(hose->cfg_addr, caddr);
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} while (in_le32(hose->cfg_addr) != caddr);
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offset &= has_uninorth ? 0x07 : 0x03;
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return hose->cfg_data + offset;
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}
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static int
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macrisc_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 *val)
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{
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struct pci_controller *hose = bus->sysdata;
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void volatile __iomem *addr;
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addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
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if (!addr)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* Note: the caller has already checked that offset is
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* suitably aligned and that len is 1, 2 or 4.
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*/
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switch (len) {
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case 1:
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*val = in_8(addr);
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break;
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case 2:
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*val = in_le16(addr);
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break;
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default:
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*val = in_le32(addr);
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static int
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macrisc_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 val)
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{
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struct pci_controller *hose = bus->sysdata;
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void volatile __iomem *addr;
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addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
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if (!addr)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* Note: the caller has already checked that offset is
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* suitably aligned and that len is 1, 2 or 4.
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*/
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switch (len) {
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case 1:
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out_8(addr, val);
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(void) in_8(addr);
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break;
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case 2:
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out_le16(addr, val);
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(void) in_le16(addr);
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break;
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default:
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out_le32(addr, val);
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(void) in_le32(addr);
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static struct pci_ops macrisc_pci_ops =
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{
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macrisc_read_config,
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macrisc_write_config
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};
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/*
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* Verifiy that a specific (bus, dev_fn) exists on chaos
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*/
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static int
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chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
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{
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struct device_node *np;
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u32 *vendor, *device;
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np = pci_busdev_to_OF_node(bus, devfn);
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if (np == NULL)
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return PCIBIOS_DEVICE_NOT_FOUND;
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vendor = (u32 *)get_property(np, "vendor-id", NULL);
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device = (u32 *)get_property(np, "device-id", NULL);
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if (vendor == NULL || device == NULL)
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return PCIBIOS_DEVICE_NOT_FOUND;
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if ((*vendor == 0x106b) && (*device == 3) && (offset >= 0x10)
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&& (offset != 0x14) && (offset != 0x18) && (offset <= 0x24))
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return PCIBIOS_BAD_REGISTER_NUMBER;
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return PCIBIOS_SUCCESSFUL;
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}
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static int
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chaos_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 *val)
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{
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int result = chaos_validate_dev(bus, devfn, offset);
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if (result == PCIBIOS_BAD_REGISTER_NUMBER)
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*val = ~0U;
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if (result != PCIBIOS_SUCCESSFUL)
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return result;
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return macrisc_read_config(bus, devfn, offset, len, val);
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}
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static int
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chaos_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 val)
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{
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int result = chaos_validate_dev(bus, devfn, offset);
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if (result != PCIBIOS_SUCCESSFUL)
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return result;
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return macrisc_write_config(bus, devfn, offset, len, val);
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}
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static struct pci_ops chaos_pci_ops =
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{
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chaos_read_config,
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chaos_write_config
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};
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#ifdef CONFIG_POWER4
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/*
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* These versions of U3 HyperTransport config space access ops do not
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* implement self-view of the HT host yet
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*/
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#define U3_HT_CFA0(devfn, off) \
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((((unsigned long)devfn) << 8) | offset)
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#define U3_HT_CFA1(bus, devfn, off) \
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(U3_HT_CFA0(devfn, off) \
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+ (((unsigned long)bus) << 16) \
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+ 0x01000000UL)
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static void volatile __iomem *
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u3_ht_cfg_access(struct pci_controller* hose, u8 bus, u8 devfn, u8 offset)
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{
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if (bus == hose->first_busno) {
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/* For now, we don't self probe U3 HT bridge */
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if (PCI_FUNC(devfn) != 0 || PCI_SLOT(devfn) > 7 ||
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PCI_SLOT(devfn) < 1)
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return 0;
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return hose->cfg_data + U3_HT_CFA0(devfn, offset);
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} else
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return hose->cfg_data + U3_HT_CFA1(bus, devfn, offset);
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}
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static int
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u3_ht_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 *val)
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{
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struct pci_controller *hose = bus->sysdata;
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void volatile __iomem *addr;
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int i;
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struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
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if (np == NULL)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* When a device in K2 is powered down, we die on config
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* cycle accesses. Fix that here.
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*/
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for (i=0; i<2; i++)
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if (k2_skiplist[i] == np) {
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switch (len) {
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case 1:
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*val = 0xff; break;
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case 2:
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*val = 0xffff; break;
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default:
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*val = 0xfffffffful; break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
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if (!addr)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* Note: the caller has already checked that offset is
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* suitably aligned and that len is 1, 2 or 4.
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*/
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switch (len) {
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case 1:
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*val = in_8(addr);
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break;
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case 2:
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*val = in_le16(addr);
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break;
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default:
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*val = in_le32(addr);
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static int
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u3_ht_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
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int len, u32 val)
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{
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struct pci_controller *hose = bus->sysdata;
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void volatile __iomem *addr;
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int i;
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struct device_node *np = pci_busdev_to_OF_node(bus, devfn);
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if (np == NULL)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* When a device in K2 is powered down, we die on config
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* cycle accesses. Fix that here.
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*/
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for (i=0; i<2; i++)
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if (k2_skiplist[i] == np)
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return PCIBIOS_SUCCESSFUL;
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addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
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if (!addr)
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return PCIBIOS_DEVICE_NOT_FOUND;
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/*
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* Note: the caller has already checked that offset is
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* suitably aligned and that len is 1, 2 or 4.
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*/
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switch (len) {
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case 1:
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out_8(addr, val);
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(void) in_8(addr);
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break;
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case 2:
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out_le16(addr, val);
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(void) in_le16(addr);
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break;
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default:
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out_le32(addr, val);
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(void) in_le32(addr);
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static struct pci_ops u3_ht_pci_ops =
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{
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u3_ht_read_config,
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u3_ht_write_config
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};
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#endif /* CONFIG_POWER4 */
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/*
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* For a bandit bridge, turn on cache coherency if necessary.
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* N.B. we could clean this up using the hose ops directly.
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*/
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static void __init
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init_bandit(struct pci_controller *bp)
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{
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unsigned int vendev, magic;
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int rev;
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/* read the word at offset 0 in config space for device 11 */
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out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + PCI_VENDOR_ID);
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udelay(2);
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vendev = in_le32(bp->cfg_data);
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if (vendev == (PCI_DEVICE_ID_APPLE_BANDIT << 16) +
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PCI_VENDOR_ID_APPLE) {
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/* read the revision id */
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out_le32(bp->cfg_addr,
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(1UL << BANDIT_DEVNUM) + PCI_REVISION_ID);
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udelay(2);
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rev = in_8(bp->cfg_data);
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if (rev != BANDIT_REVID)
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printk(KERN_WARNING
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"Unknown revision %d for bandit\n", rev);
|
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} else if (vendev != (BANDIT_DEVID_2 << 16) + PCI_VENDOR_ID_APPLE) {
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printk(KERN_WARNING "bandit isn't? (%x)\n", vendev);
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return;
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}
|
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|
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/* read the word at offset 0x50 */
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out_le32(bp->cfg_addr, (1UL << BANDIT_DEVNUM) + BANDIT_MAGIC);
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udelay(2);
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magic = in_le32(bp->cfg_data);
|
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if ((magic & BANDIT_COHERENT) != 0)
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return;
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magic |= BANDIT_COHERENT;
|
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udelay(2);
|
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out_le32(bp->cfg_data, magic);
|
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printk(KERN_INFO "Cache coherency enabled for bandit/PSX\n");
|
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}
|
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|
|
|
|
/*
|
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* Tweak the PCI-PCI bridge chip on the blue & white G3s.
|
|
*/
|
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static void __init
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init_p2pbridge(void)
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{
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struct device_node *p2pbridge;
|
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struct pci_controller* hose;
|
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u8 bus, devfn;
|
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u16 val;
|
|
|
|
/* XXX it would be better here to identify the specific
|
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PCI-PCI bridge chip we have. */
|
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if ((p2pbridge = find_devices("pci-bridge")) == 0
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|| p2pbridge->parent == NULL
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|
|| strcmp(p2pbridge->parent->name, "pci") != 0)
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|
return;
|
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if (pci_device_from_OF_node(p2pbridge, &bus, &devfn) < 0) {
|
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DBG("Can't find PCI infos for PCI<->PCI bridge\n");
|
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return;
|
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}
|
|
/* Warning: At this point, we have not yet renumbered all busses.
|
|
* So we must use OF walking to find out hose
|
|
*/
|
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hose = pci_find_hose_for_OF_device(p2pbridge);
|
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if (!hose) {
|
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DBG("Can't find hose for PCI<->PCI bridge\n");
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return;
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}
|
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if (early_read_config_word(hose, bus, devfn,
|
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PCI_BRIDGE_CONTROL, &val) < 0) {
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printk(KERN_ERR "init_p2pbridge: couldn't read bridge control\n");
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return;
|
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}
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val &= ~PCI_BRIDGE_CTL_MASTER_ABORT;
|
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early_write_config_word(hose, bus, devfn, PCI_BRIDGE_CONTROL, val);
|
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}
|
|
|
|
/*
|
|
* Some Apple desktop machines have a NEC PD720100A USB2 controller
|
|
* on the motherboard. Open Firmware, on these, will disable the
|
|
* EHCI part of it so it behaves like a pair of OHCI's. This fixup
|
|
* code re-enables it ;)
|
|
*/
|
|
static void __init
|
|
fixup_nec_usb2(void)
|
|
{
|
|
struct device_node *nec;
|
|
|
|
for (nec = NULL; (nec = of_find_node_by_name(nec, "usb")) != NULL;) {
|
|
struct pci_controller *hose;
|
|
u32 data, *prop;
|
|
u8 bus, devfn;
|
|
|
|
prop = (u32 *)get_property(nec, "vendor-id", NULL);
|
|
if (prop == NULL)
|
|
continue;
|
|
if (0x1033 != *prop)
|
|
continue;
|
|
prop = (u32 *)get_property(nec, "device-id", NULL);
|
|
if (prop == NULL)
|
|
continue;
|
|
if (0x0035 != *prop)
|
|
continue;
|
|
prop = (u32 *)get_property(nec, "reg", NULL);
|
|
if (prop == NULL)
|
|
continue;
|
|
devfn = (prop[0] >> 8) & 0xff;
|
|
bus = (prop[0] >> 16) & 0xff;
|
|
if (PCI_FUNC(devfn) != 0)
|
|
continue;
|
|
hose = pci_find_hose_for_OF_device(nec);
|
|
if (!hose)
|
|
continue;
|
|
early_read_config_dword(hose, bus, devfn, 0xe4, &data);
|
|
if (data & 1UL) {
|
|
printk("Found NEC PD720100A USB2 chip with disabled EHCI, fixing up...\n");
|
|
data &= ~1UL;
|
|
early_write_config_dword(hose, bus, devfn, 0xe4, data);
|
|
early_write_config_byte(hose, bus, devfn | 2, PCI_INTERRUPT_LINE,
|
|
nec->intrs[0].line);
|
|
}
|
|
}
|
|
}
|
|
|
|
void __init
|
|
pmac_find_bridges(void)
|
|
{
|
|
struct device_node *np, *root;
|
|
struct device_node *ht = NULL;
|
|
|
|
root = of_find_node_by_path("/");
|
|
if (root == NULL) {
|
|
printk(KERN_CRIT "pmac_find_bridges: can't find root of device tree\n");
|
|
return;
|
|
}
|
|
for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
|
|
if (np->name == NULL)
|
|
continue;
|
|
if (strcmp(np->name, "bandit") == 0
|
|
|| strcmp(np->name, "chaos") == 0
|
|
|| strcmp(np->name, "pci") == 0) {
|
|
if (add_bridge(np) == 0)
|
|
of_node_get(np);
|
|
}
|
|
if (strcmp(np->name, "ht") == 0) {
|
|
of_node_get(np);
|
|
ht = np;
|
|
}
|
|
}
|
|
of_node_put(root);
|
|
|
|
/* Probe HT last as it relies on the agp resources to be already
|
|
* setup
|
|
*/
|
|
if (ht && add_bridge(ht) != 0)
|
|
of_node_put(ht);
|
|
|
|
init_p2pbridge();
|
|
fixup_nec_usb2();
|
|
|
|
/* We are still having some issues with the Xserve G4, enabling
|
|
* some offset between bus number and domains for now when we
|
|
* assign all busses should help for now
|
|
*/
|
|
if (pci_assign_all_buses)
|
|
pcibios_assign_bus_offset = 0x10;
|
|
|
|
#ifdef CONFIG_POWER4
|
|
/* There is something wrong with DMA on U3/HT. I haven't figured out
|
|
* the details yet, but if I set the cache line size to 128 bytes like
|
|
* it should, I'm getting memory corruption caused by devices like
|
|
* sungem (even without the MWI bit set, but maybe sungem doesn't
|
|
* care). Right now, it appears that setting up a 64 bytes line size
|
|
* works properly, 64 bytes beeing the max transfer size of HT, I
|
|
* suppose this is related the way HT/PCI are hooked together. I still
|
|
* need to dive into more specs though to be really sure of what's
|
|
* going on. --BenH.
|
|
*
|
|
* Ok, apparently, it's just that HT can't do more than 64 bytes
|
|
* transactions. MWI seem to be meaningless there as well, it may
|
|
* be worth nop'ing out pci_set_mwi too though I haven't done that
|
|
* yet.
|
|
*
|
|
* Note that it's a bit different for whatever is in the AGP slot.
|
|
* For now, I don't care, but this can become a real issue, we
|
|
* should probably hook pci_set_mwi anyway to make sure it sets
|
|
* the real cache line size in there.
|
|
*/
|
|
if (machine_is_compatible("MacRISC4"))
|
|
pci_cache_line_size = 16; /* 64 bytes */
|
|
|
|
pmac_check_ht_link();
|
|
#endif /* CONFIG_POWER4 */
|
|
}
|
|
|
|
#define GRACKLE_CFA(b, d, o) (0x80 | ((b) << 8) | ((d) << 16) \
|
|
| (((o) & ~3) << 24))
|
|
|
|
#define GRACKLE_PICR1_STG 0x00000040
|
|
#define GRACKLE_PICR1_LOOPSNOOP 0x00000010
|
|
|
|
/* N.B. this is called before bridges is initialized, so we can't
|
|
use grackle_pcibios_{read,write}_config_dword. */
|
|
static inline void grackle_set_stg(struct pci_controller* bp, int enable)
|
|
{
|
|
unsigned int val;
|
|
|
|
out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
|
|
val = in_le32(bp->cfg_data);
|
|
val = enable? (val | GRACKLE_PICR1_STG) :
|
|
(val & ~GRACKLE_PICR1_STG);
|
|
out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
|
|
out_le32(bp->cfg_data, val);
|
|
(void)in_le32(bp->cfg_data);
|
|
}
|
|
|
|
static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable)
|
|
{
|
|
unsigned int val;
|
|
|
|
out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
|
|
val = in_le32(bp->cfg_data);
|
|
val = enable? (val | GRACKLE_PICR1_LOOPSNOOP) :
|
|
(val & ~GRACKLE_PICR1_LOOPSNOOP);
|
|
out_be32(bp->cfg_addr, GRACKLE_CFA(0, 0, 0xa8));
|
|
out_le32(bp->cfg_data, val);
|
|
(void)in_le32(bp->cfg_data);
|
|
}
|
|
|
|
static int __init
|
|
setup_uninorth(struct pci_controller* hose, struct reg_property* addr)
|
|
{
|
|
pci_assign_all_buses = 1;
|
|
has_uninorth = 1;
|
|
hose->ops = ¯isc_pci_ops;
|
|
hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
|
|
hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
|
|
/* We "know" that the bridge at f2000000 has the PCI slots. */
|
|
return addr->address == 0xf2000000;
|
|
}
|
|
|
|
static void __init
|
|
setup_bandit(struct pci_controller* hose, struct reg_property* addr)
|
|
{
|
|
hose->ops = ¯isc_pci_ops;
|
|
hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
|
|
hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
|
|
init_bandit(hose);
|
|
}
|
|
|
|
static void __init
|
|
setup_chaos(struct pci_controller* hose, struct reg_property* addr)
|
|
{
|
|
/* assume a `chaos' bridge */
|
|
hose->ops = &chaos_pci_ops;
|
|
hose->cfg_addr = ioremap(addr->address + 0x800000, 0x1000);
|
|
hose->cfg_data = ioremap(addr->address + 0xc00000, 0x1000);
|
|
}
|
|
|
|
#ifdef CONFIG_POWER4
|
|
|
|
static void __init
|
|
setup_u3_agp(struct pci_controller* hose, struct reg_property* addr)
|
|
{
|
|
/* On G5, we move AGP up to high bus number so we don't need
|
|
* to reassign bus numbers for HT. If we ever have P2P bridges
|
|
* on AGP, we'll have to move pci_assign_all_buses to the
|
|
* pci_controller structure so we enable it for AGP and not for
|
|
* HT childs.
|
|
* We hard code the address because of the different size of
|
|
* the reg address cell, we shall fix that by killing struct
|
|
* reg_property and using some accessor functions instead
|
|
*/
|
|
hose->first_busno = 0xf0;
|
|
hose->last_busno = 0xff;
|
|
has_uninorth = 1;
|
|
hose->ops = ¯isc_pci_ops;
|
|
hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
|
|
hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
|
|
|
|
u3_agp = hose;
|
|
}
|
|
|
|
static void __init
|
|
setup_u3_ht(struct pci_controller* hose, struct reg_property *addr)
|
|
{
|
|
struct device_node *np = (struct device_node *)hose->arch_data;
|
|
int i, cur;
|
|
|
|
hose->ops = &u3_ht_pci_ops;
|
|
|
|
/* We hard code the address because of the different size of
|
|
* the reg address cell, we shall fix that by killing struct
|
|
* reg_property and using some accessor functions instead
|
|
*/
|
|
hose->cfg_data = ioremap(0xf2000000, 0x02000000);
|
|
|
|
/*
|
|
* /ht node doesn't expose a "ranges" property, so we "remove" regions that
|
|
* have been allocated to AGP. So far, this version of the code doesn't assign
|
|
* any of the 0xfxxxxxxx "fine" memory regions to /ht.
|
|
* We need to fix that sooner or later by either parsing all child "ranges"
|
|
* properties or figuring out the U3 address space decoding logic and
|
|
* then read its configuration register (if any).
|
|
*/
|
|
hose->io_base_phys = 0xf4000000;
|
|
hose->io_base_virt = ioremap(hose->io_base_phys, 0x00400000);
|
|
isa_io_base = (unsigned long) hose->io_base_virt;
|
|
hose->io_resource.name = np->full_name;
|
|
hose->io_resource.start = 0;
|
|
hose->io_resource.end = 0x003fffff;
|
|
hose->io_resource.flags = IORESOURCE_IO;
|
|
hose->pci_mem_offset = 0;
|
|
hose->first_busno = 0;
|
|
hose->last_busno = 0xef;
|
|
hose->mem_resources[0].name = np->full_name;
|
|
hose->mem_resources[0].start = 0x80000000;
|
|
hose->mem_resources[0].end = 0xefffffff;
|
|
hose->mem_resources[0].flags = IORESOURCE_MEM;
|
|
|
|
if (u3_agp == NULL) {
|
|
DBG("U3 has no AGP, using full resource range\n");
|
|
return;
|
|
}
|
|
|
|
/* We "remove" the AGP resources from the resources allocated to HT, that
|
|
* is we create "holes". However, that code does assumptions that so far
|
|
* happen to be true (cross fingers...), typically that resources in the
|
|
* AGP node are properly ordered
|
|
*/
|
|
cur = 0;
|
|
for (i=0; i<3; i++) {
|
|
struct resource *res = &u3_agp->mem_resources[i];
|
|
if (res->flags != IORESOURCE_MEM)
|
|
continue;
|
|
/* We don't care about "fine" resources */
|
|
if (res->start >= 0xf0000000)
|
|
continue;
|
|
/* Check if it's just a matter of "shrinking" us in one direction */
|
|
if (hose->mem_resources[cur].start == res->start) {
|
|
DBG("U3/HT: shrink start of %d, %08lx -> %08lx\n",
|
|
cur, hose->mem_resources[cur].start, res->end + 1);
|
|
hose->mem_resources[cur].start = res->end + 1;
|
|
continue;
|
|
}
|
|
if (hose->mem_resources[cur].end == res->end) {
|
|
DBG("U3/HT: shrink end of %d, %08lx -> %08lx\n",
|
|
cur, hose->mem_resources[cur].end, res->start - 1);
|
|
hose->mem_resources[cur].end = res->start - 1;
|
|
continue;
|
|
}
|
|
/* No, it's not the case, we need a hole */
|
|
if (cur == 2) {
|
|
/* not enough resources to make a hole, we drop part of the range */
|
|
printk(KERN_WARNING "Running out of resources for /ht host !\n");
|
|
hose->mem_resources[cur].end = res->start - 1;
|
|
continue;
|
|
}
|
|
cur++;
|
|
DBG("U3/HT: hole, %d end at %08lx, %d start at %08lx\n",
|
|
cur-1, res->start - 1, cur, res->end + 1);
|
|
hose->mem_resources[cur].name = np->full_name;
|
|
hose->mem_resources[cur].flags = IORESOURCE_MEM;
|
|
hose->mem_resources[cur].start = res->end + 1;
|
|
hose->mem_resources[cur].end = hose->mem_resources[cur-1].end;
|
|
hose->mem_resources[cur-1].end = res->start - 1;
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_POWER4 */
|
|
|
|
void __init
|
|
setup_grackle(struct pci_controller *hose)
|
|
{
|
|
setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
|
|
if (machine_is_compatible("AAPL,PowerBook1998"))
|
|
grackle_set_loop_snoop(hose, 1);
|
|
#if 0 /* Disabled for now, HW problems ??? */
|
|
grackle_set_stg(hose, 1);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* We assume that if we have a G3 powermac, we have one bridge called
|
|
* "pci" (a MPC106) and no bandit or chaos bridges, and contrariwise,
|
|
* if we have one or more bandit or chaos bridges, we don't have a MPC106.
|
|
*/
|
|
static int __init
|
|
add_bridge(struct device_node *dev)
|
|
{
|
|
int len;
|
|
struct pci_controller *hose;
|
|
struct reg_property *addr;
|
|
char* disp_name;
|
|
int *bus_range;
|
|
int primary = 1;
|
|
|
|
DBG("Adding PCI host bridge %s\n", dev->full_name);
|
|
|
|
addr = (struct reg_property *) get_property(dev, "reg", &len);
|
|
if (addr == NULL || len < sizeof(*addr)) {
|
|
printk(KERN_WARNING "Can't use %s: no address\n",
|
|
dev->full_name);
|
|
return -ENODEV;
|
|
}
|
|
bus_range = (int *) get_property(dev, "bus-range", &len);
|
|
if (bus_range == NULL || len < 2 * sizeof(int)) {
|
|
printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
|
|
dev->full_name);
|
|
}
|
|
|
|
hose = pcibios_alloc_controller();
|
|
if (!hose)
|
|
return -ENOMEM;
|
|
hose->arch_data = dev;
|
|
hose->first_busno = bus_range ? bus_range[0] : 0;
|
|
hose->last_busno = bus_range ? bus_range[1] : 0xff;
|
|
|
|
disp_name = NULL;
|
|
#ifdef CONFIG_POWER4
|
|
if (device_is_compatible(dev, "u3-agp")) {
|
|
setup_u3_agp(hose, addr);
|
|
disp_name = "U3-AGP";
|
|
primary = 0;
|
|
} else if (device_is_compatible(dev, "u3-ht")) {
|
|
setup_u3_ht(hose, addr);
|
|
disp_name = "U3-HT";
|
|
primary = 1;
|
|
} else
|
|
#endif /* CONFIG_POWER4 */
|
|
if (device_is_compatible(dev, "uni-north")) {
|
|
primary = setup_uninorth(hose, addr);
|
|
disp_name = "UniNorth";
|
|
} else if (strcmp(dev->name, "pci") == 0) {
|
|
/* XXX assume this is a mpc106 (grackle) */
|
|
setup_grackle(hose);
|
|
disp_name = "Grackle (MPC106)";
|
|
} else if (strcmp(dev->name, "bandit") == 0) {
|
|
setup_bandit(hose, addr);
|
|
disp_name = "Bandit";
|
|
} else if (strcmp(dev->name, "chaos") == 0) {
|
|
setup_chaos(hose, addr);
|
|
disp_name = "Chaos";
|
|
primary = 0;
|
|
}
|
|
printk(KERN_INFO "Found %s PCI host bridge at 0x%08x. Firmware bus number: %d->%d\n",
|
|
disp_name, addr->address, hose->first_busno, hose->last_busno);
|
|
DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
|
|
hose, hose->cfg_addr, hose->cfg_data);
|
|
|
|
/* Interpret the "ranges" property */
|
|
/* This also maps the I/O region and sets isa_io/mem_base */
|
|
pci_process_bridge_OF_ranges(hose, dev, primary);
|
|
|
|
/* Fixup "bus-range" OF property */
|
|
fixup_bus_range(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __init
|
|
pcibios_fixup_OF_interrupts(void)
|
|
{
|
|
struct pci_dev* dev = NULL;
|
|
|
|
/*
|
|
* Open Firmware often doesn't initialize the
|
|
* PCI_INTERRUPT_LINE config register properly, so we
|
|
* should find the device node and apply the interrupt
|
|
* obtained from the OF device-tree
|
|
*/
|
|
for_each_pci_dev(dev) {
|
|
struct device_node *node;
|
|
node = pci_device_to_OF_node(dev);
|
|
/* this is the node, see if it has interrupts */
|
|
if (node && node->n_intrs > 0)
|
|
dev->irq = node->intrs[0].line;
|
|
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
|
|
}
|
|
}
|
|
|
|
void __init
|
|
pmac_pcibios_fixup(void)
|
|
{
|
|
/* Fixup interrupts according to OF tree */
|
|
pcibios_fixup_OF_interrupts();
|
|
}
|
|
|
|
int
|
|
pmac_pci_enable_device_hook(struct pci_dev *dev, int initial)
|
|
{
|
|
struct device_node* node;
|
|
int updatecfg = 0;
|
|
int uninorth_child;
|
|
|
|
node = pci_device_to_OF_node(dev);
|
|
|
|
/* We don't want to enable USB controllers absent from the OF tree
|
|
* (iBook second controller)
|
|
*/
|
|
if (dev->vendor == PCI_VENDOR_ID_APPLE
|
|
&& (dev->class == ((PCI_CLASS_SERIAL_USB << 8) | 0x10))
|
|
&& !node) {
|
|
printk(KERN_INFO "Apple USB OHCI %s disabled by firmware\n",
|
|
pci_name(dev));
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!node)
|
|
return 0;
|
|
|
|
uninorth_child = node->parent &&
|
|
device_is_compatible(node->parent, "uni-north");
|
|
|
|
/* Firewire & GMAC were disabled after PCI probe, the driver is
|
|
* claiming them, we must re-enable them now.
|
|
*/
|
|
if (uninorth_child && !strcmp(node->name, "firewire") &&
|
|
(device_is_compatible(node, "pci106b,18") ||
|
|
device_is_compatible(node, "pci106b,30") ||
|
|
device_is_compatible(node, "pci11c1,5811"))) {
|
|
pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, node, 0, 1);
|
|
pmac_call_feature(PMAC_FTR_1394_ENABLE, node, 0, 1);
|
|
updatecfg = 1;
|
|
}
|
|
if (uninorth_child && !strcmp(node->name, "ethernet") &&
|
|
device_is_compatible(node, "gmac")) {
|
|
pmac_call_feature(PMAC_FTR_GMAC_ENABLE, node, 0, 1);
|
|
updatecfg = 1;
|
|
}
|
|
|
|
if (updatecfg) {
|
|
u16 cmd;
|
|
|
|
/*
|
|
* Make sure PCI is correctly configured
|
|
*
|
|
* We use old pci_bios versions of the function since, by
|
|
* default, gmac is not powered up, and so will be absent
|
|
* from the kernel initial PCI lookup.
|
|
*
|
|
* Should be replaced by 2.4 new PCI mechanisms and really
|
|
* register the device.
|
|
*/
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
|
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 16);
|
|
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, pci_cache_line_size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* We power down some devices after they have been probed. They'll
|
|
* be powered back on later on
|
|
*/
|
|
void __init
|
|
pmac_pcibios_after_init(void)
|
|
{
|
|
struct device_node* nd;
|
|
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
|
struct pci_dev *dev = NULL;
|
|
|
|
/* OF fails to initialize IDE controllers on macs
|
|
* (and maybe other machines)
|
|
*
|
|
* Ideally, this should be moved to the IDE layer, but we need
|
|
* to check specifically with Andre Hedrick how to do it cleanly
|
|
* since the common IDE code seem to care about the fact that the
|
|
* BIOS may have disabled a controller.
|
|
*
|
|
* -- BenH
|
|
*/
|
|
for_each_pci_dev(dev) {
|
|
if ((dev->class >> 16) == PCI_BASE_CLASS_STORAGE)
|
|
pci_enable_device(dev);
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
|
|
|
nd = find_devices("firewire");
|
|
while (nd) {
|
|
if (nd->parent && (device_is_compatible(nd, "pci106b,18") ||
|
|
device_is_compatible(nd, "pci106b,30") ||
|
|
device_is_compatible(nd, "pci11c1,5811"))
|
|
&& device_is_compatible(nd->parent, "uni-north")) {
|
|
pmac_call_feature(PMAC_FTR_1394_ENABLE, nd, 0, 0);
|
|
pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, nd, 0, 0);
|
|
}
|
|
nd = nd->next;
|
|
}
|
|
nd = find_devices("ethernet");
|
|
while (nd) {
|
|
if (nd->parent && device_is_compatible(nd, "gmac")
|
|
&& device_is_compatible(nd->parent, "uni-north"))
|
|
pmac_call_feature(PMAC_FTR_GMAC_ENABLE, nd, 0, 0);
|
|
nd = nd->next;
|
|
}
|
|
}
|
|
|
|
void pmac_pci_fixup_cardbus(struct pci_dev* dev)
|
|
{
|
|
if (_machine != _MACH_Pmac)
|
|
return;
|
|
/*
|
|
* Fix the interrupt routing on the various cardbus bridges
|
|
* used on powerbooks
|
|
*/
|
|
if (dev->vendor != PCI_VENDOR_ID_TI)
|
|
return;
|
|
if (dev->device == PCI_DEVICE_ID_TI_1130 ||
|
|
dev->device == PCI_DEVICE_ID_TI_1131) {
|
|
u8 val;
|
|
/* Enable PCI interrupt */
|
|
if (pci_read_config_byte(dev, 0x91, &val) == 0)
|
|
pci_write_config_byte(dev, 0x91, val | 0x30);
|
|
/* Disable ISA interrupt mode */
|
|
if (pci_read_config_byte(dev, 0x92, &val) == 0)
|
|
pci_write_config_byte(dev, 0x92, val & ~0x06);
|
|
}
|
|
if (dev->device == PCI_DEVICE_ID_TI_1210 ||
|
|
dev->device == PCI_DEVICE_ID_TI_1211 ||
|
|
dev->device == PCI_DEVICE_ID_TI_1410 ||
|
|
dev->device == PCI_DEVICE_ID_TI_1510) {
|
|
u8 val;
|
|
/* 0x8c == TI122X_IRQMUX, 2 says to route the INTA
|
|
signal out the MFUNC0 pin */
|
|
if (pci_read_config_byte(dev, 0x8c, &val) == 0)
|
|
pci_write_config_byte(dev, 0x8c, (val & ~0x0f) | 2);
|
|
/* Disable ISA interrupt mode */
|
|
if (pci_read_config_byte(dev, 0x92, &val) == 0)
|
|
pci_write_config_byte(dev, 0x92, val & ~0x06);
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus);
|
|
|
|
void pmac_pci_fixup_pciata(struct pci_dev* dev)
|
|
{
|
|
u8 progif = 0;
|
|
|
|
/*
|
|
* On PowerMacs, we try to switch any PCI ATA controller to
|
|
* fully native mode
|
|
*/
|
|
if (_machine != _MACH_Pmac)
|
|
return;
|
|
/* Some controllers don't have the class IDE */
|
|
if (dev->vendor == PCI_VENDOR_ID_PROMISE)
|
|
switch(dev->device) {
|
|
case PCI_DEVICE_ID_PROMISE_20246:
|
|
case PCI_DEVICE_ID_PROMISE_20262:
|
|
case PCI_DEVICE_ID_PROMISE_20263:
|
|
case PCI_DEVICE_ID_PROMISE_20265:
|
|
case PCI_DEVICE_ID_PROMISE_20267:
|
|
case PCI_DEVICE_ID_PROMISE_20268:
|
|
case PCI_DEVICE_ID_PROMISE_20269:
|
|
case PCI_DEVICE_ID_PROMISE_20270:
|
|
case PCI_DEVICE_ID_PROMISE_20271:
|
|
case PCI_DEVICE_ID_PROMISE_20275:
|
|
case PCI_DEVICE_ID_PROMISE_20276:
|
|
case PCI_DEVICE_ID_PROMISE_20277:
|
|
goto good;
|
|
}
|
|
/* Others, check PCI class */
|
|
if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
|
|
return;
|
|
good:
|
|
pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
|
|
if ((progif & 5) != 5) {
|
|
printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n", pci_name(dev));
|
|
(void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
|
|
if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
|
|
(progif & 5) != 5)
|
|
printk(KERN_ERR "Rewrite of PROGIF failed !\n");
|
|
}
|
|
}
|
|
DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
|
|
|
|
|
|
/*
|
|
* Disable second function on K2-SATA, it's broken
|
|
* and disable IO BARs on first one
|
|
*/
|
|
void pmac_pci_fixup_k2_sata(struct pci_dev* dev)
|
|
{
|
|
int i;
|
|
u16 cmd;
|
|
|
|
if (PCI_FUNC(dev->devfn) > 0) {
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
|
for (i = 0; i < 6; i++) {
|
|
dev->resource[i].start = dev->resource[i].end = 0;
|
|
dev->resource[i].flags = 0;
|
|
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
|
|
}
|
|
} else {
|
|
pci_read_config_word(dev, PCI_COMMAND, &cmd);
|
|
cmd &= ~PCI_COMMAND_IO;
|
|
pci_write_config_word(dev, PCI_COMMAND, cmd);
|
|
for (i = 0; i < 5; i++) {
|
|
dev->resource[i].start = dev->resource[i].end = 0;
|
|
dev->resource[i].flags = 0;
|
|
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
|
|
}
|
|
}
|
|
}
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, pmac_pci_fixup_k2_sata);
|