1 #ifndef __ASM_SH_PCI_H
2 #define __ASM_SH_PCI_H
3
4 #ifdef __KERNEL__
5
6 /* Can be used to override the logic in pci_scan_bus for skipping
7 already-configured bus numbers - to be used for buggy BIOSes
8 or architectures with incomplete PCI setup by the loader */
9
10 #define pcibios_assign_all_busses() 1
11
12 /*
13 * A board can define one or more PCI channels that represent built-in (or
14 * external) PCI controllers.
15 */
16 struct pci_channel {
17 struct pci_channel *next;
18 struct pci_bus *bus;
19
20 struct pci_ops *pci_ops;
21
22 struct resource *resources;
23 unsigned int nr_resources;
24
25 unsigned long io_offset;
26 unsigned long mem_offset;
27
28 unsigned long reg_base;
29 unsigned long io_map_base;
30
31 unsigned int index;
32 unsigned int need_domain_info;
33
34 /* Optional error handling */
35 struct timer_list err_timer, serr_timer;
36 unsigned int err_irq, serr_irq;
37 };
38
39 /* arch/sh/drivers/pci/pci.c */
40 extern raw_spinlock_t pci_config_lock;
41
42 extern int register_pci_controller(struct pci_channel *hose);
43 extern void pcibios_report_status(unsigned int status_mask, int warn);
44
45 /* arch/sh/drivers/pci/common.c */
46 extern int early_read_config_byte(struct pci_channel *hose, int top_bus,
47 int bus, int devfn, int offset, u8 *value);
48 extern int early_read_config_word(struct pci_channel *hose, int top_bus,
49 int bus, int devfn, int offset, u16 *value);
50 extern int early_read_config_dword(struct pci_channel *hose, int top_bus,
51 int bus, int devfn, int offset, u32 *value);
52 extern int early_write_config_byte(struct pci_channel *hose, int top_bus,
53 int bus, int devfn, int offset, u8 value);
54 extern int early_write_config_word(struct pci_channel *hose, int top_bus,
55 int bus, int devfn, int offset, u16 value);
56 extern int early_write_config_dword(struct pci_channel *hose, int top_bus,
57 int bus, int devfn, int offset, u32 value);
58 extern void pcibios_enable_timers(struct pci_channel *hose);
59 extern unsigned int pcibios_handle_status_errors(unsigned long addr,
60 unsigned int status, struct pci_channel *hose);
61 extern int pci_is_66mhz_capable(struct pci_channel *hose,
62 int top_bus, int current_bus);
63
64 extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM;
65
66 struct pci_dev;
67
68 #define HAVE_PCI_MMAP
69 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
70 enum pci_mmap_state mmap_state, int write_combine);
71 extern void pcibios_set_master(struct pci_dev *dev);
72
73 /* Dynamic DMA mapping stuff.
74 * SuperH has everything mapped statically like x86.
75 */
76
77 /* The PCI address space does equal the physical memory
78 * address space. The networking and block device layers use
79 * this boolean for bounce buffer decisions.
80 */
81 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
82
83 #ifdef CONFIG_PCI
84 /*
85 * None of the SH PCI controllers support MWI, it is always treated as a
86 * direct memory write.
87 */
88 #define PCI_DISABLE_MWI
89
pci_dma_burst_advice(struct pci_dev * pdev,enum pci_dma_burst_strategy * strat,unsigned long * strategy_parameter)90 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
91 enum pci_dma_burst_strategy *strat,
92 unsigned long *strategy_parameter)
93 {
94 unsigned long cacheline_size;
95 u8 byte;
96
97 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
98
99 if (byte == 0)
100 cacheline_size = L1_CACHE_BYTES;
101 else
102 cacheline_size = byte << 2;
103
104 *strat = PCI_DMA_BURST_MULTIPLE;
105 *strategy_parameter = cacheline_size;
106 }
107 #endif
108
109 /* Board-specific fixup routines. */
110 int pcibios_map_platform_irq(const struct pci_dev *dev, u8 slot, u8 pin);
111
112 #define pci_domain_nr(bus) ((struct pci_channel *)(bus)->sysdata)->index
113
pci_proc_domain(struct pci_bus * bus)114 static inline int pci_proc_domain(struct pci_bus *bus)
115 {
116 struct pci_channel *hose = bus->sysdata;
117 return hose->need_domain_info;
118 }
119
120 /* Chances are this interrupt is wired PC-style ... */
pci_get_legacy_ide_irq(struct pci_dev * dev,int channel)121 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
122 {
123 return channel ? 15 : 14;
124 }
125
126 /* generic DMA-mapping stuff */
127 #include <asm-generic/pci-dma-compat.h>
128
129 #endif /* __KERNEL__ */
130 #endif /* __ASM_SH_PCI_H */
131
132