diff options
Diffstat (limited to 'arch/mips/pci/pci-ip27.c')
| -rw-r--r-- | arch/mips/pci/pci-ip27.c | 292 |
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) { |
