1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  arch/arm/include/asm/mach/pci.h
4 *
5 *  Copyright (C) 2000 Russell King
6 */
7
8#ifndef __ASM_MACH_PCI_H
9#define __ASM_MACH_PCI_H
10
11#include <linux/ioport.h>
12
13struct pci_sys_data;
14struct pci_ops;
15struct pci_bus;
16struct pci_host_bridge;
17struct device;
18
19struct hw_pci {
20	struct pci_ops	*ops;
21	int		nr_controllers;
22	void		**private_data;
23	int		(*setup)(int nr, struct pci_sys_data *);
24	int		(*scan)(int nr, struct pci_host_bridge *);
25	void		(*preinit)(void);
26	void		(*postinit)(void);
27	u8		(*swizzle)(struct pci_dev *dev, u8 *pin);
28	int		(*map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
29};
30
31/*
32 * Per-controller structure
33 */
34struct pci_sys_data {
35	struct list_head node;
36	int		busnr;		/* primary bus number			*/
37	u64		mem_offset;	/* bus->cpu memory mapping offset	*/
38	unsigned long	io_offset;	/* bus->cpu IO mapping offset		*/
39	struct pci_bus	*bus;		/* PCI bus				*/
40	struct list_head resources;	/* root bus resources (apertures)       */
41	struct resource io_res;
42	char		io_res_name[12];
43					/* Bridge swizzling			*/
44	u8		(*swizzle)(struct pci_dev *, u8 *);
45					/* IRQ mapping				*/
46	int		(*map_irq)(const struct pci_dev *, u8, u8);
47	void		*private_data;	/* platform controller private data	*/
48};
49
50/*
51 * Call this with your hw_pci struct to initialise the PCI system.
52 */
53void pci_common_init_dev(struct device *, struct hw_pci *);
54
55/*
56 * Compatibility wrapper for older platforms that do not care about
57 * passing the parent device.
58 */
59static inline void pci_common_init(struct hw_pci *hw)
60{
61	pci_common_init_dev(NULL, hw);
62}
63
64/*
65 * Setup early fixed I/O mapping.
66 */
67#if defined(CONFIG_PCI)
68extern void pci_map_io_early(unsigned long pfn);
69#else
70static inline void pci_map_io_early(unsigned long pfn) {}
71#endif
72
73/*
74 * PCI controllers
75 */
76extern struct pci_ops iop3xx_ops;
77extern int iop3xx_pci_setup(int nr, struct pci_sys_data *);
78extern void iop3xx_pci_preinit(void);
79extern void iop3xx_pci_preinit_cond(void);
80
81extern struct pci_ops dc21285_ops;
82extern int dc21285_setup(int nr, struct pci_sys_data *);
83extern void dc21285_preinit(void);
84extern void dc21285_postinit(void);
85
86#endif /* __ASM_MACH_PCI_H */
87