arch/microblaze/include/asm/pci-bridge.h

   1 #ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H
   2 #define _ASM_MICROBLAZE_PCI_BRIDGE_H
   3 #ifdef __KERNEL__
   4 /*
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version
   8  * 2 of the License, or (at your option) any later version.
   9  */
  10 #include <linux/pci.h>
  11 #include <linux/list.h>
  12 #include <linux/ioport.h>
  13 #include <asm-generic/pci-bridge.h>
  14
  15 struct device_node;
  16
  17 #ifdef CONFIG_PCI
  18 extern struct list_head hose_list;
  19 extern int pcibios_vaddr_is_ioport(void __iomem *address);
  20 #else
  21 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
  22 {
  23         return 0;
  24 }
  25 #endif
  26
  27 /*
  28  * Structure of a PCI controller (host bridge)
  29  */
  30 struct pci_controller {
  31         struct pci_bus *bus;
  32         char is_dynamic;
  33         struct device_node *dn;
  34         struct list_head list_node;
  35         struct device *parent;
  36
  37         int first_busno;
  38         int last_busno;
  39
  40         int self_busno;
  41
  42         void __iomem *io_base_virt;
  43         resource_size_t io_base_phys;
  44
  45         resource_size_t pci_io_size;
  46
  47         /* Some machines (PReP) have a non 1:1 mapping of
  48          * the PCI memory space in the CPU bus space
  49          */
  50         resource_size_t pci_mem_offset;
  51
  52         /* Some machines have a special region to forward the ISA
  53          * "memory" cycles such as VGA memory regions. Left to 0
  54          * if unsupported
  55          */
  56         resource_size_t isa_mem_phys;
  57         resource_size_t isa_mem_size;
  58
  59         struct pci_ops *ops;
  60         unsigned int __iomem *cfg_addr;
  61         void __iomem *cfg_data;
  62
  63         /*
  64          * Used for variants of PCI indirect handling and possible quirks:
  65          *  SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
  66          *  EXT_REG - provides access to PCI-e extended registers
  67          *  SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
  68          *   on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
  69          *   to determine which bus number to match on when generating type0
  70          *   config cycles
  71          *  NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
  72          *   hanging if we don't have link and try to do config cycles to
  73          *   anything but the PHB.  Only allow talking to the PHB if this is
  74          *   set.
  75          *  BIG_ENDIAN - cfg_addr is a big endian register
  76          *  BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs
  77          *   on the PLB4.  Effectively disable MRM commands by setting this.
  78          */
  79 #define INDIRECT_TYPE_SET_CFG_TYPE              0x00000001
  80 #define INDIRECT_TYPE_EXT_REG           0x00000002
  81 #define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS      0x00000004
  82 #define INDIRECT_TYPE_NO_PCIE_LINK              0x00000008
  83 #define INDIRECT_TYPE_BIG_ENDIAN                0x00000010
  84 #define INDIRECT_TYPE_BROKEN_MRM                0x00000020
  85         u32 indirect_type;
  86
  87         /* Currently, we limit ourselves to 1 IO range and 3 mem
  88          * ranges since the common pci_bus structure can't handle more
  89          */
  90         struct resource io_resource;
  91         struct resource mem_resources[3];
  92         int global_number;      /* PCI domain number */
  93 };
  94
  95 #ifdef CONFIG_PCI
  96 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
  97 {
  98         return bus->sysdata;
  99 }
 100
 101 static inline int isa_vaddr_is_ioport(void __iomem *address)
 102 {
 103         /* No specific ISA handling on ppc32 at this stage, it
 104          * all goes through PCI
 105          */
 106         return 0;
 107 }
 108 #endif /* CONFIG_PCI */
 109
 110 /* These are used for config access before all the PCI probing
 111    has been done. */
 112 extern int early_read_config_byte(struct pci_controller *hose, int bus,
 113                         int dev_fn, int where, u8 *val);
 114 extern int early_read_config_word(struct pci_controller *hose, int bus,
 115                         int dev_fn, int where, u16 *val);
 116 extern int early_read_config_dword(struct pci_controller *hose, int bus,
 117                         int dev_fn, int where, u32 *val);
 118 extern int early_write_config_byte(struct pci_controller *hose, int bus,
 119                         int dev_fn, int where, u8 val);
 120 extern int early_write_config_word(struct pci_controller *hose, int bus,
 121                         int dev_fn, int where, u16 val);
 122 extern int early_write_config_dword(struct pci_controller *hose, int bus,
 123                         int dev_fn, int where, u32 val);
 124
 125 extern int early_find_capability(struct pci_controller *hose, int bus,
 126                                  int dev_fn, int cap);
 127
 128 extern void setup_indirect_pci(struct pci_controller *hose,
 129                                resource_size_t cfg_addr,
 130                                resource_size_t cfg_data, u32 flags);
 131
 132 /* Get the PCI host controller for an OF device */
 133 extern struct pci_controller *pci_find_hose_for_OF_device(
 134                         struct device_node *node);
 135
 136 /* Fill up host controller resources from the OF node */
 137 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
 138                         struct device_node *dev, int primary);
 139
 140 /* Allocate & free a PCI host bridge structure */
 141 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
 142 extern void pcibios_free_controller(struct pci_controller *phb);
 143 extern void pcibios_setup_phb_resources(struct pci_controller *hose);
 144
 145 #endif  /* __KERNEL__ */
 146 #endif  /* _ASM_MICROBLAZE_PCI_BRIDGE_H */