1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 */
6 #ifndef _ASM_PCI_H
7 #define _ASM_PCI_H
8
9 #include <linux/mm.h>
10
11 #ifdef __KERNEL__
12
13 /*
14 * This file essentially defines the interface between board
15 * specific PCI code and MIPS common PCI code. Should potentially put
16 * into include/asm/pci.h file.
17 */
18
19 #include <linux/ioport.h>
20 #include <linux/list.h>
21 #include <linux/of.h>
22
23 #ifdef CONFIG_PCI_DRIVERS_LEGACY
24
25 /*
26 * Each pci channel is a top-level PCI bus seem by CPU. A machine with
27 * multiple PCI channels may have multiple PCI host controllers or a
28 * single controller supporting multiple channels.
29 */
30 struct pci_controller {
31 struct list_head list;
32 struct pci_bus *bus;
33 struct device_node *of_node;
34
35 struct pci_ops *pci_ops;
36 struct resource *mem_resource;
37 unsigned long mem_offset;
38 struct resource *io_resource;
39 unsigned long io_offset;
40 unsigned long io_map_base;
41
42 #ifndef CONFIG_PCI_DOMAINS_GENERIC
43 unsigned int index;
44 /* For compatibility with current (as of July 2003) pciutils
45 and XFree86. Eventually will be removed. */
46 unsigned int need_domain_info;
47 #endif
48
49 /* Optional access methods for reading/writing the bus number
50 of the PCI controller */
51 int (*get_busno)(void);
52 void (*set_busno)(int busno);
53 };
54
55 /*
56 * Used by boards to register their PCI busses before the actual scanning.
57 */
58 extern void register_pci_controller(struct pci_controller *hose);
59
60 /*
61 * board supplied pci irq fixup routine
62 */
63 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
64
65 /* Do platform specific device initialization at pci_enable_device() time */
66 extern int pcibios_plat_dev_init(struct pci_dev *dev);
67
68 extern char * (*pcibios_plat_setup)(char *str);
69
70 #ifdef CONFIG_OF
71 /* this function parses memory ranges from a device node */
72 extern void pci_load_of_ranges(struct pci_controller *hose,
73 struct device_node *node);
74 #else
pci_load_of_ranges(struct pci_controller * hose,struct device_node * node)75 static inline void pci_load_of_ranges(struct pci_controller *hose,
76 struct device_node *node) {}
77 #endif
78
79 #ifdef CONFIG_PCI_DOMAINS_GENERIC
set_pci_need_domain_info(struct pci_controller * hose,int need_domain_info)80 static inline void set_pci_need_domain_info(struct pci_controller *hose,
81 int need_domain_info)
82 {
83 /* nothing to do */
84 }
85 #elif defined(CONFIG_PCI_DOMAINS)
set_pci_need_domain_info(struct pci_controller * hose,int need_domain_info)86 static inline void set_pci_need_domain_info(struct pci_controller *hose,
87 int need_domain_info)
88 {
89 hose->need_domain_info = need_domain_info;
90 }
91 #endif /* CONFIG_PCI_DOMAINS */
92
93 #endif
94
95 /* Can be used to override the logic in pci_scan_bus for skipping
96 already-configured bus numbers - to be used for buggy BIOSes
97 or architectures with incomplete PCI setup by the loader */
pcibios_assign_all_busses(void)98 static inline unsigned int pcibios_assign_all_busses(void)
99 {
100 return 1;
101 }
102
103 extern unsigned long PCIBIOS_MIN_IO;
104 extern unsigned long PCIBIOS_MIN_MEM;
105
106 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
107
108 #define HAVE_PCI_MMAP
109 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
110
111 /*
112 * Dynamic DMA mapping stuff.
113 * MIPS has everything mapped statically.
114 */
115
116 #include <linux/types.h>
117 #include <linux/slab.h>
118 #include <linux/scatterlist.h>
119 #include <linux/string.h>
120 #include <asm/io.h>
121
122 #ifdef CONFIG_PCI_DOMAINS_GENERIC
pci_proc_domain(struct pci_bus * bus)123 static inline int pci_proc_domain(struct pci_bus *bus)
124 {
125 return pci_domain_nr(bus);
126 }
127 #elif defined(CONFIG_PCI_DOMAINS)
128 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
129
pci_proc_domain(struct pci_bus * bus)130 static inline int pci_proc_domain(struct pci_bus *bus)
131 {
132 struct pci_controller *hose = bus->sysdata;
133 return hose->need_domain_info;
134 }
135 #endif /* CONFIG_PCI_DOMAINS */
136
137 #endif /* __KERNEL__ */
138
139 /* Do platform specific device initialization at pci_enable_device() time */
140 extern int pcibios_plat_dev_init(struct pci_dev *dev);
141
142 /* Chances are this interrupt is wired PC-style ... */
pci_get_legacy_ide_irq(struct pci_dev * dev,int channel)143 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
144 {
145 return channel ? 15 : 14;
146 }
147
148 #endif /* _ASM_PCI_H */
149
