xref: /openbmc/linux/arch/mips/include/asm/pci.h (revision f220d3eb)
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 	struct resource *busn_resource;
42 
43 #ifndef CONFIG_PCI_DOMAINS_GENERIC
44 	unsigned int index;
45 	/* For compatibility with current (as of July 2003) pciutils
46 	   and XFree86. Eventually will be removed. */
47 	unsigned int need_domain_info;
48 #endif
49 
50 	/* Optional access methods for reading/writing the bus number
51 	   of the PCI controller */
52 	int (*get_busno)(void);
53 	void (*set_busno)(int busno);
54 };
55 
56 /*
57  * Used by boards to register their PCI busses before the actual scanning.
58  */
59 extern void register_pci_controller(struct pci_controller *hose);
60 
61 /*
62  * board supplied pci irq fixup routine
63  */
64 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
65 
66 /* Do platform specific device initialization at pci_enable_device() time */
67 extern int pcibios_plat_dev_init(struct pci_dev *dev);
68 
69 extern char * (*pcibios_plat_setup)(char *str);
70 
71 #ifdef CONFIG_OF
72 /* this function parses memory ranges from a device node */
73 extern void pci_load_of_ranges(struct pci_controller *hose,
74 			       struct device_node *node);
75 #else
76 static inline void pci_load_of_ranges(struct pci_controller *hose,
77 				      struct device_node *node) {}
78 #endif
79 
80 #ifdef CONFIG_PCI_DOMAINS_GENERIC
81 static inline void set_pci_need_domain_info(struct pci_controller *hose,
82 					    int need_domain_info)
83 {
84 	/* nothing to do */
85 }
86 #elif defined(CONFIG_PCI_DOMAINS)
87 static inline void set_pci_need_domain_info(struct pci_controller *hose,
88 					    int need_domain_info)
89 {
90 	hose->need_domain_info = need_domain_info;
91 }
92 #endif /* CONFIG_PCI_DOMAINS */
93 
94 #endif
95 
96 /* Can be used to override the logic in pci_scan_bus for skipping
97    already-configured bus numbers - to be used for buggy BIOSes
98    or architectures with incomplete PCI setup by the loader */
99 static inline unsigned int pcibios_assign_all_busses(void)
100 {
101 	return 1;
102 }
103 
104 extern unsigned long PCIBIOS_MIN_IO;
105 extern unsigned long PCIBIOS_MIN_MEM;
106 
107 #define PCIBIOS_MIN_CARDBUS_IO	0x4000
108 
109 #define HAVE_PCI_MMAP
110 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
111 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
112 
113 /*
114  * Dynamic DMA mapping stuff.
115  * MIPS has everything mapped statically.
116  */
117 
118 #include <linux/types.h>
119 #include <linux/slab.h>
120 #include <linux/scatterlist.h>
121 #include <linux/string.h>
122 #include <asm/io.h>
123 
124 #ifdef CONFIG_PCI_DOMAINS_GENERIC
125 static inline int pci_proc_domain(struct pci_bus *bus)
126 {
127 	return pci_domain_nr(bus);
128 }
129 #elif defined(CONFIG_PCI_DOMAINS)
130 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
131 
132 static inline int pci_proc_domain(struct pci_bus *bus)
133 {
134 	struct pci_controller *hose = bus->sysdata;
135 	return hose->need_domain_info;
136 }
137 #endif /* CONFIG_PCI_DOMAINS */
138 
139 #endif /* __KERNEL__ */
140 
141 /* Do platform specific device initialization at pci_enable_device() time */
142 extern int pcibios_plat_dev_init(struct pci_dev *dev);
143 
144 /* Chances are this interrupt is wired PC-style ...  */
145 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
146 {
147 	return channel ? 15 : 14;
148 }
149 
150 #endif /* _ASM_PCI_H */
151