From a5b08047129f214af1899bd9088605c7adc21ed5 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Mon, 20 Apr 2009 20:41:45 +0900 Subject: sh: pci: Rename ops-cayman -> fixups-cayman. Now that ops-cayman.c only contains IRQ routing fixups, rename it. Signed-off-by: Paul Mundt --- arch/sh/drivers/pci/Makefile | 2 +- arch/sh/drivers/pci/fixups-cayman.c | 77 +++++++++++++++++++++++++++++++++++++ arch/sh/drivers/pci/ops-cayman.c | 77 ------------------------------------- 3 files changed, 78 insertions(+), 78 deletions(-) create mode 100644 arch/sh/drivers/pci/fixups-cayman.c delete mode 100644 arch/sh/drivers/pci/ops-cayman.c (limited to 'arch/sh/drivers') diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile index 2160a06b6c11..cb2190c3e36b 100644 --- a/arch/sh/drivers/pci/Makefile +++ b/arch/sh/drivers/pci/Makefile @@ -24,4 +24,4 @@ obj-$(CONFIG_SH_7780_SOLUTION_ENGINE) += fixups-sdk7780.o obj-$(CONFIG_SH_TITAN) += ops-titan.o obj-$(CONFIG_SH_LANDISK) += ops-landisk.o obj-$(CONFIG_SH_LBOX_RE2) += ops-lboxre2.o fixups-rts7751r2d.o -obj-$(CONFIG_SH_CAYMAN) += ops-cayman.o +obj-$(CONFIG_SH_CAYMAN) += fixups-cayman.o diff --git a/arch/sh/drivers/pci/fixups-cayman.c b/arch/sh/drivers/pci/fixups-cayman.c new file mode 100644 index 000000000000..b68b61d22c6c --- /dev/null +++ b/arch/sh/drivers/pci/fixups-cayman.c @@ -0,0 +1,77 @@ +#include +#include +#include +#include +#include +#include "pci-sh5.h" + +int __init pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin) +{ + int result = -1; + + /* The complication here is that the PCI IRQ lines from the Cayman's 2 + 5V slots get into the CPU via a different path from the IRQ lines + from the 3 3.3V slots. Thus, we have to detect whether the card's + interrupts go via the 5V or 3.3V path, i.e. the 'bridge swizzling' + at the point where we cross from 5V to 3.3V is not the normal case. + + The added complication is that we don't know that the 5V slots are + always bus 2, because a card containing a PCI-PCI bridge may be + plugged into a 3.3V slot, and this changes the bus numbering. + + Also, the Cayman has an intermediate PCI bus that goes a custom + expansion board header (and to the secondary bridge). This bus has + never been used in practice. + + The 1ary onboard PCI-PCI bridge is device 3 on bus 0 + The 2ary onboard PCI-PCI bridge is device 0 on the 2ary bus of + the 1ary bridge. + */ + + struct slot_pin { + int slot; + int pin; + } path[4]; + int i=0; + + while (dev->bus->number > 0) { + + slot = path[i].slot = PCI_SLOT(dev->devfn); + pin = path[i].pin = pci_swizzle_interrupt_pin(dev, pin); + dev = dev->bus->self; + i++; + if (i > 3) panic("PCI path to root bus too long!\n"); + } + + slot = PCI_SLOT(dev->devfn); + /* This is the slot on bus 0 through which the device is eventually + reachable. */ + + /* Now work back up. */ + if ((slot < 3) || (i == 0)) { + /* Bus 0 (incl. PCI-PCI bridge itself) : perform the final + swizzle now. */ + result = IRQ_INTA + pci_swizzle_interrupt_pin(dev, pin) - 1; + } else { + i--; + slot = path[i].slot; + pin = path[i].pin; + if (slot > 0) { + panic("PCI expansion bus device found - not handled!\n"); + } else { + if (i > 0) { + /* 5V slots */ + i--; + slot = path[i].slot; + pin = path[i].pin; + /* 'pin' was swizzled earlier wrt slot, don't do it again. */ + result = IRQ_P2INTA + (pin - 1); + } else { + /* IRQ for 2ary PCI-PCI bridge : unused */ + result = -1; + } + } + } + + return result; +} diff --git a/arch/sh/drivers/pci/ops-cayman.c b/arch/sh/drivers/pci/ops-cayman.c deleted file mode 100644 index b68b61d22c6c..000000000000 --- a/arch/sh/drivers/pci/ops-cayman.c +++ /dev/null @@ -1,77 +0,0 @@ -#include -#include -#include -#include -#include -#include "pci-sh5.h" - -int __init pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin) -{ - int result = -1; - - /* The complication here is that the PCI IRQ lines from the Cayman's 2 - 5V slots get into the CPU via a different path from the IRQ lines - from the 3 3.3V slots. Thus, we have to detect whether the card's - interrupts go via the 5V or 3.3V path, i.e. the 'bridge swizzling' - at the point where we cross from 5V to 3.3V is not the normal case. - - The added complication is that we don't know that the 5V slots are - always bus 2, because a card containing a PCI-PCI bridge may be - plugged into a 3.3V slot, and this changes the bus numbering. - - Also, the Cayman has an intermediate PCI bus that goes a custom - expansion board header (and to the secondary bridge). This bus has - never been used in practice. - - The 1ary onboard PCI-PCI bridge is device 3 on bus 0 - The 2ary onboard PCI-PCI bridge is device 0 on the 2ary bus of - the 1ary bridge. - */ - - struct slot_pin { - int slot; - int pin; - } path[4]; - int i=0; - - while (dev->bus->number > 0) { - - slot = path[i].slot = PCI_SLOT(dev->devfn); - pin = path[i].pin = pci_swizzle_interrupt_pin(dev, pin); - dev = dev->bus->self; - i++; - if (i > 3) panic("PCI path to root bus too long!\n"); - } - - slot = PCI_SLOT(dev->devfn); - /* This is the slot on bus 0 through which the device is eventually - reachable. */ - - /* Now work back up. */ - if ((slot < 3) || (i == 0)) { - /* Bus 0 (incl. PCI-PCI bridge itself) : perform the final - swizzle now. */ - result = IRQ_INTA + pci_swizzle_interrupt_pin(dev, pin) - 1; - } else { - i--; - slot = path[i].slot; - pin = path[i].pin; - if (slot > 0) { - panic("PCI expansion bus device found - not handled!\n"); - } else { - if (i > 0) { - /* 5V slots */ - i--; - slot = path[i].slot; - pin = path[i].pin; - /* 'pin' was swizzled earlier wrt slot, don't do it again. */ - result = IRQ_P2INTA + (pin - 1); - } else { - /* IRQ for 2ary PCI-PCI bridge : unused */ - result = -1; - } - } - } - - return result; -} -- cgit v1.2.3