mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 00:21:59 +00:00
7d52c7b0cd
There are times that we need to know which controller we are on to decide how to exclude devices properly. We now pass the pci_controller that we are going to use down to the pci_exclude_device function. This will greatly simplify being able to exclude the PHBs in multiple controller setups. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
|
|
* Support for indirect PCI bridges.
|
|
*
|
|
* Copyright (C) 1998 Gabriel Paubert.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/machdep.h>
|
|
|
|
#ifdef CONFIG_PPC_INDIRECT_PCI_BE
|
|
#define PCI_CFG_OUT out_be32
|
|
#else
|
|
#define PCI_CFG_OUT out_le32
|
|
#endif
|
|
|
|
static int
|
|
indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
|
|
int len, u32 *val)
|
|
{
|
|
struct pci_controller *hose = bus->sysdata;
|
|
volatile void __iomem *cfg_data;
|
|
u8 cfg_type = 0;
|
|
|
|
if (ppc_md.pci_exclude_device)
|
|
if (ppc_md.pci_exclude_device(bus->number, devfn))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
if (hose->set_cfg_type)
|
|
if (bus->number != hose->first_busno)
|
|
cfg_type = 1;
|
|
|
|
PCI_CFG_OUT(hose->cfg_addr,
|
|
(0x80000000 | ((bus->number - hose->bus_offset) << 16)
|
|
| (devfn << 8) | ((offset & 0xfc) | cfg_type)));
|
|
|
|
/*
|
|
* Note: the caller has already checked that offset is
|
|
* suitably aligned and that len is 1, 2 or 4.
|
|
*/
|
|
cfg_data = hose->cfg_data + (offset & 3);
|
|
switch (len) {
|
|
case 1:
|
|
*val = in_8(cfg_data);
|
|
break;
|
|
case 2:
|
|
*val = in_le16(cfg_data);
|
|
break;
|
|
default:
|
|
*val = in_le32(cfg_data);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
|
|
int len, u32 val)
|
|
{
|
|
struct pci_controller *hose = bus->sysdata;
|
|
volatile void __iomem *cfg_data;
|
|
u8 cfg_type = 0;
|
|
|
|
if (ppc_md.pci_exclude_device)
|
|
if (ppc_md.pci_exclude_device(bus->number, devfn))
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
if (hose->set_cfg_type)
|
|
if (bus->number != hose->first_busno)
|
|
cfg_type = 1;
|
|
|
|
PCI_CFG_OUT(hose->cfg_addr,
|
|
(0x80000000 | ((bus->number - hose->bus_offset) << 16)
|
|
| (devfn << 8) | ((offset & 0xfc) | cfg_type)));
|
|
|
|
/*
|
|
* Note: the caller has already checked that offset is
|
|
* suitably aligned and that len is 1, 2 or 4.
|
|
*/
|
|
cfg_data = hose->cfg_data + (offset & 3);
|
|
switch (len) {
|
|
case 1:
|
|
out_8(cfg_data, val);
|
|
break;
|
|
case 2:
|
|
out_le16(cfg_data, val);
|
|
break;
|
|
default:
|
|
out_le32(cfg_data, val);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static struct pci_ops indirect_pci_ops =
|
|
{
|
|
indirect_read_config,
|
|
indirect_write_config
|
|
};
|
|
|
|
void __init
|
|
setup_indirect_pci_nomap(struct pci_controller* hose, void __iomem * cfg_addr,
|
|
void __iomem * cfg_data)
|
|
{
|
|
hose->cfg_addr = cfg_addr;
|
|
hose->cfg_data = cfg_data;
|
|
hose->ops = &indirect_pci_ops;
|
|
}
|
|
|
|
void __init
|
|
setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
|
|
{
|
|
unsigned long base = cfg_addr & PAGE_MASK;
|
|
void __iomem *mbase, *addr, *data;
|
|
|
|
mbase = ioremap(base, PAGE_SIZE);
|
|
addr = mbase + (cfg_addr & ~PAGE_MASK);
|
|
if ((cfg_data & PAGE_MASK) != base)
|
|
mbase = ioremap(cfg_data & PAGE_MASK, PAGE_SIZE);
|
|
data = mbase + (cfg_data & ~PAGE_MASK);
|
|
setup_indirect_pci_nomap(hose, addr, data);
|
|
}
|