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[POWERPC] Pass the pci_controller into pci_exclude_device
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>
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Kumar Gala
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Jun 29, 2007
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| /* | ||
| * 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); | ||
| } |
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