diff options
Diffstat (limited to 'arch/microblaze/pci/indirect_pci.c')
| -rw-r--r-- | arch/microblaze/pci/indirect_pci.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/arch/microblaze/pci/indirect_pci.c b/arch/microblaze/pci/indirect_pci.c deleted file mode 100644 index 1caf7d3e0eef..000000000000 --- a/arch/microblaze/pci/indirect_pci.c +++ /dev/null @@ -1,158 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Support for indirect PCI bridges. - * - * Copyright (C) 1998 Gabriel Paubert. - */ - -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/delay.h> -#include <linux/string.h> -#include <linux/init.h> - -#include <linux/io.h> -#include <asm/pci-bridge.h> - -static int -indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset, - int len, u32 *val) -{ - struct pci_controller *hose = pci_bus_to_host(bus); - volatile void __iomem *cfg_data; - u8 cfg_type = 0; - u32 bus_no, reg; - - if (hose->indirect_type & INDIRECT_TYPE_NO_PCIE_LINK) { - if (bus->number != hose->first_busno) - return PCIBIOS_DEVICE_NOT_FOUND; - if (devfn != 0) - return PCIBIOS_DEVICE_NOT_FOUND; - } - - if (hose->indirect_type & INDIRECT_TYPE_SET_CFG_TYPE) - if (bus->number != hose->first_busno) - cfg_type = 1; - - bus_no = (bus->number == hose->first_busno) ? - hose->self_busno : bus->number; - - if (hose->indirect_type & INDIRECT_TYPE_EXT_REG) - reg = ((offset & 0xf00) << 16) | (offset & 0xfc); - else - reg = offset & 0xfc; /* Only 3 bits for function */ - - if (hose->indirect_type & INDIRECT_TYPE_BIG_ENDIAN) - out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) | - (devfn << 8) | reg | cfg_type)); - else - out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) | - (devfn << 8) | reg | 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); /* Only 3 bits for function */ - 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 = pci_bus_to_host(bus); - volatile void __iomem *cfg_data; - u8 cfg_type = 0; - u32 bus_no, reg; - - if (hose->indirect_type & INDIRECT_TYPE_NO_PCIE_LINK) { - if (bus->number != hose->first_busno) - return PCIBIOS_DEVICE_NOT_FOUND; - if (devfn != 0) - return PCIBIOS_DEVICE_NOT_FOUND; - } - - if (hose->indirect_type & INDIRECT_TYPE_SET_CFG_TYPE) - if (bus->number != hose->first_busno) - cfg_type = 1; - - bus_no = (bus->number == hose->first_busno) ? - hose->self_busno : bus->number; - - if (hose->indirect_type & INDIRECT_TYPE_EXT_REG) - reg = ((offset & 0xf00) << 16) | (offset & 0xfc); - else - reg = offset & 0xfc; - - if (hose->indirect_type & INDIRECT_TYPE_BIG_ENDIAN) - out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) | - (devfn << 8) | reg | cfg_type)); - else - out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) | - (devfn << 8) | reg | cfg_type)); - - /* suppress setting of PCI_PRIMARY_BUS */ - if (hose->indirect_type & INDIRECT_TYPE_SURPRESS_PRIMARY_BUS) - if ((offset == PCI_PRIMARY_BUS) && - (bus->number == hose->first_busno)) - val &= 0xffffff00; - - /* Workaround for PCI_28 Errata in 440EPx/GRx */ - if ((hose->indirect_type & INDIRECT_TYPE_BROKEN_MRM) && - offset == PCI_CACHE_LINE_SIZE) { - val = 0; - } - - /* - * 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 = { - .read = indirect_read_config, - .write = indirect_write_config, -}; - -void __init -setup_indirect_pci(struct pci_controller *hose, - resource_size_t cfg_addr, - resource_size_t cfg_data, u32 flags) -{ - resource_size_t base = cfg_addr & PAGE_MASK; - void __iomem *mbase; - - mbase = ioremap(base, PAGE_SIZE); - hose->cfg_addr = mbase + (cfg_addr & ~PAGE_MASK); - if ((cfg_data & PAGE_MASK) != base) - mbase = ioremap(cfg_data & PAGE_MASK, PAGE_SIZE); - hose->cfg_data = mbase + (cfg_data & ~PAGE_MASK); - hose->ops = &indirect_pci_ops; - hose->indirect_type = flags; -} |