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Diffstat (limited to 'arch/mips/pci/pci-ip27.c')
-rw-r--r--arch/mips/pci/pci-ip27.c292
1 files changed, 1 insertions, 291 deletions
diff --git a/arch/mips/pci/pci-ip27.c b/arch/mips/pci/pci-ip27.c
index 662196d9fb58..80eb9af9ecdf 100644
--- a/arch/mips/pci/pci-ip27.c
+++ b/arch/mips/pci/pci-ip27.c
@@ -40,297 +40,7 @@ static struct bridge_controller bridges[MAX_PCI_BUSSES];
struct bridge_controller *irq_to_bridge[MAX_PCI_BUSSES * MAX_DEVICES_PER_PCIBUS];
int irq_to_slot[MAX_PCI_BUSSES * MAX_DEVICES_PER_PCIBUS];
-/*
- * The Bridge ASIC supports both type 0 and type 1 access. Type 1 is
- * not really documented, so right now I can't write code which uses it.
- * Therefore we use type 0 accesses for now even though they won't work
- * correcly for PCI-to-PCI bridges.
- *
- * The function is complicated by the ultimate brokeness of the IOC3 chip
- * which is used in SGI systems. The IOC3 can only handle 32-bit PCI
- * accesses and does only decode parts of it's address space.
- */
-
-static int pci_conf0_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask;
- int res;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
-
- if (size == 1)
- res = get_dbe(*value, (u8 *) addr);
- else if (size == 2)
- res = get_dbe(*value, (u16 *) addr);
- else
- res = get_dbe(*value, (u32 *) addr);
-
- return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
- *value = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- *value = (cf >> shift) & mask;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int busno = bus->number;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask;
- int res;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
-
- if (size == 1)
- res = get_dbe(*value, (u8 *) addr);
- else if (size == 2)
- res = get_dbe(*value, (u16 *) addr);
- else
- res = get_dbe(*value, (u32 *) addr);
-
- return res ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
- *value = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | where];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- *value = (cf >> shift) & mask;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_read_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * value)
-{
- if (bus->number > 0)
- return pci_conf1_read_config(bus, devfn, where, size, value);
-
- return pci_conf0_read_config(bus, devfn, where, size, value);
-}
-
-static int pci_conf0_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- volatile void *addr;
- u32 cf, shift, mask, smask;
- int res;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].c[where ^ (4 - size)];
-
- if (size == 1) {
- res = put_dbe(value, (u8 *) addr);
- } else if (size == 2) {
- res = put_dbe(value, (u16 *) addr);
- } else {
- res = put_dbe(value, (u32 *) addr);
- }
-
- if (res)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to touch the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
- return PCIBIOS_SUCCESSFUL;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- smask = mask << shift;
-
- cf = (cf & ~smask) | ((value & mask) << shift);
- if (put_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);
- bridge_t *bridge = bc->base;
- int slot = PCI_SLOT(devfn);
- int fn = PCI_FUNC(devfn);
- int busno = bus->number;
- volatile void *addr;
- u32 cf, shift, mask, smask;
- int res;
-
- bridge->b_pci_cfg = (busno << 16) | (slot << 11);
- addr = &bridge->b_type1_cfg.c[(fn << 8) | PCI_VENDOR_ID];
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to look at it for real ...
- */
- if (cf == (PCI_VENDOR_ID_SGI | (PCI_DEVICE_ID_SGI_IOC3 << 16)))
- goto oh_my_gawd;
-
- addr = &bridge->b_type1_cfg.c[(fn << 8) | (where ^ (4 - size))];
-
- if (size == 1) {
- res = put_dbe(value, (u8 *) addr);
- } else if (size == 2) {
- res = put_dbe(value, (u16 *) addr);
- } else {
- res = put_dbe(value, (u32 *) addr);
- }
-
- if (res)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-
-oh_my_gawd:
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't even give the
- * generic PCI code a chance to touch the wrong register.
- */
- if ((where >= 0x14 && where < 0x40) || (where >= 0x48))
- return PCIBIOS_SUCCESSFUL;
-
- /*
- * IOC3 is fucked fucked beyond believe ... Don't try to access
- * anything but 32-bit words ...
- */
- addr = &bridge->b_type0_cfg_dev[slot].f[fn].l[where >> 2];
-
- if (get_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- shift = ((where & 3) << 3);
- mask = (0xffffffffU >> ((4 - size) << 3));
- smask = mask << shift;
-
- cf = (cf & ~smask) | ((value & mask) << shift);
- if (put_dbe(cf, (u32 *) addr))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_write_config(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 value)
-{
- if (bus->number > 0)
- return pci_conf1_write_config(bus, devfn, where, size, value);
-
- return pci_conf0_write_config(bus, devfn, where, size, value);
-}
-
-static struct pci_ops bridge_pci_ops = {
- .read = pci_read_config,
- .write = pci_write_config,
-};
+extern struct pci_ops bridge_pci_ops;
int __init bridge_probe(nasid_t nasid, int widget_id, int masterwid)
{
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