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 */
30struct 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 */
58extern void register_pci_controller(struct pci_controller *hose);
59
60/*
61 * board supplied pci irq fixup routine
62 */
63extern 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 */
66extern int pcibios_plat_dev_init(struct pci_dev *dev);
67
68extern char * (*pcibios_plat_setup)(char *str);
69
70#ifdef CONFIG_OF
71/* this function parses memory ranges from a device node */
72extern void pci_load_of_ranges(struct pci_controller *hose,
73			       struct device_node *node);
74#else
75static inline void pci_load_of_ranges(struct pci_controller *hose,
76				      struct device_node *node) {}
77#endif
78
79#ifdef CONFIG_PCI_DOMAINS_GENERIC
80static 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)
86static 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 */
98static inline unsigned int pcibios_assign_all_busses(void)
99{
100	return 1;
101}
102
103extern unsigned long PCIBIOS_MIN_IO;
104extern 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
123static 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
130static 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 */
140extern int pcibios_plat_dev_init(struct pci_dev *dev);
141
142#endif /* _ASM_PCI_H */
143