arch/sh/include/asm/pci.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_PCI_H
   3 #define __ASM_SH_PCI_H
   4
   5 #ifdef __KERNEL__
   6
   7 /* Can be used to override the logic in pci_scan_bus for skipping
   8    already-configured bus numbers - to be used for buggy BIOSes
   9    or architectures with incomplete PCI setup by the loader */
  10
  11 #define pcibios_assign_all_busses()     1
  12
  13 /*
  14  * A board can define one or more PCI channels that represent built-in (or
  15  * external) PCI controllers.
  16  */
  17 struct pci_channel {
  18         struct pci_channel      *next;
  19         struct pci_bus          *bus;
  20
  21         struct pci_ops          *pci_ops;
  22
  23         struct resource         *resources;
  24         unsigned int            nr_resources;
  25
  26         unsigned long           io_offset;
  27         unsigned long           mem_offset;
  28
  29         unsigned long           reg_base;
  30         unsigned long           io_map_base;
  31
  32         unsigned int            index;
  33         unsigned int            need_domain_info;
  34
  35         /* Optional error handling */
  36         struct timer_list       err_timer, serr_timer;
  37         unsigned int            err_irq, serr_irq;
  38 };
  39
  40 /* arch/sh/drivers/pci/pci.c */
  41 extern raw_spinlock_t pci_config_lock;
  42
  43 extern int register_pci_controller(struct pci_channel *hose);
  44 extern void pcibios_report_status(unsigned int status_mask, int warn);
  45
  46 /* arch/sh/drivers/pci/common.c */
  47 extern int early_read_config_byte(struct pci_channel *hose, int top_bus,
  48                                   int bus, int devfn, int offset, u8 *value);
  49 extern int early_read_config_word(struct pci_channel *hose, int top_bus,
  50                                   int bus, int devfn, int offset, u16 *value);
  51 extern int early_read_config_dword(struct pci_channel *hose, int top_bus,
  52                                    int bus, int devfn, int offset, u32 *value);
  53 extern int early_write_config_byte(struct pci_channel *hose, int top_bus,
  54                                    int bus, int devfn, int offset, u8 value);
  55 extern int early_write_config_word(struct pci_channel *hose, int top_bus,
  56                                    int bus, int devfn, int offset, u16 value);
  57 extern int early_write_config_dword(struct pci_channel *hose, int top_bus,
  58                                     int bus, int devfn, int offset, u32 value);
  59 extern void pcibios_enable_timers(struct pci_channel *hose);
  60 extern unsigned int pcibios_handle_status_errors(unsigned long addr,
  61                                  unsigned int status, struct pci_channel *hose);
  62 extern int pci_is_66mhz_capable(struct pci_channel *hose,
  63                                 int top_bus, int current_bus);
  64
  65 extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM;
  66
  67 #define HAVE_PCI_MMAP
  68 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
  69
  70 /* Dynamic DMA mapping stuff.
  71  * SuperH has everything mapped statically like x86.
  72  */
  73
  74 /* The PCI address space does equal the physical memory
  75  * address space.  The networking and block device layers use
  76  * this boolean for bounce buffer decisions.
  77  */
  78 #define PCI_DMA_BUS_IS_PHYS     (dma_ops->is_phys)
  79
  80 #ifdef CONFIG_PCI
  81 /*
  82  * None of the SH PCI controllers support MWI, it is always treated as a
  83  * direct memory write.
  84  */
  85 #define PCI_DISABLE_MWI
  86 #endif
  87
  88 /* Board-specific fixup routines. */
  89 int pcibios_map_platform_irq(const struct pci_dev *dev, u8 slot, u8 pin);
  90
  91 #define pci_domain_nr(bus) ((struct pci_channel *)(bus)->sysdata)->index
  92
  93 static inline int pci_proc_domain(struct pci_bus *bus)
  94 {
  95         struct pci_channel *hose = bus->sysdata;
  96         return hose->need_domain_info;
  97 }
  98
  99 /* Chances are this interrupt is wired PC-style ...  */
 100 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 101 {
 102         return channel ? 15 : 14;
 103 }
 104
 105 #endif /* __KERNEL__ */
 106 #endif /* __ASM_SH_PCI_H */
 107