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 #endif /* _ASM_PCI_H */
143