1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * CompactPCI Hot Plug Core Functions
4 *
5 * Copyright (C) 2002 SOMA Networks, Inc.
6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001 IBM Corp.
8 *
9 * All rights reserved.
10 *
11 * Send feedback to <scottm@somanetworks.com>
12 */
13
14#ifndef _CPCI_HOTPLUG_H
15#define _CPCI_HOTPLUG_H
16
17#include <linux/types.h>
18#include <linux/pci.h>
19#include <linux/pci_hotplug.h>
20
21/* PICMG 2.1 R2.0 HS CSR bits: */
22#define HS_CSR_INS	0x0080
23#define HS_CSR_EXT	0x0040
24#define HS_CSR_PI	0x0030
25#define HS_CSR_LOO	0x0008
26#define HS_CSR_PIE	0x0004
27#define HS_CSR_EIM	0x0002
28#define HS_CSR_DHA	0x0001
29
30struct slot {
31	u8 number;
32	unsigned int devfn;
33	struct pci_bus *bus;
34	struct pci_dev *dev;
35	unsigned int latch_status:1;
36	unsigned int adapter_status:1;
37	unsigned int extracting;
38	struct hotplug_slot hotplug_slot;
39	struct list_head slot_list;
40};
41
42struct cpci_hp_controller_ops {
43	int (*query_enum)(void);
44	int (*enable_irq)(void);
45	int (*disable_irq)(void);
46	int (*check_irq)(void *dev_id);
47	int (*hardware_test)(struct slot *slot, u32 value);
48	u8  (*get_power)(struct slot *slot);
49	int (*set_power)(struct slot *slot, int value);
50};
51
52struct cpci_hp_controller {
53	unsigned int irq;
54	unsigned long irq_flags;
55	char *devname;
56	void *dev_id;
57	char *name;
58	struct cpci_hp_controller_ops *ops;
59};
60
61static inline const char *slot_name(struct slot *slot)
62{
63	return hotplug_slot_name(&slot->hotplug_slot);
64}
65
66static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot)
67{
68	return container_of(hotplug_slot, struct slot, hotplug_slot);
69}
70
71int cpci_hp_register_controller(struct cpci_hp_controller *controller);
72int cpci_hp_unregister_controller(struct cpci_hp_controller *controller);
73int cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last);
74int cpci_hp_unregister_bus(struct pci_bus *bus);
75int cpci_hp_start(void);
76int cpci_hp_stop(void);
77
78/* Global variables */
79extern int cpci_debug;
80
81/*
82 * Internal function prototypes, these functions should not be used by
83 * board/chassis drivers.
84 */
85u8 cpci_get_attention_status(struct slot *slot);
86u16 cpci_get_hs_csr(struct slot *slot);
87int cpci_set_attention_status(struct slot *slot, int status);
88int cpci_check_and_clear_ins(struct slot *slot);
89int cpci_check_ext(struct slot *slot);
90int cpci_clear_ext(struct slot *slot);
91int cpci_led_on(struct slot *slot);
92int cpci_led_off(struct slot *slot);
93int cpci_configure_slot(struct slot *slot);
94int cpci_unconfigure_slot(struct slot *slot);
95
96#ifdef CONFIG_HOTPLUG_PCI_CPCI
97int cpci_hotplug_init(int debug);
98#else
99static inline int cpci_hotplug_init(int debug) { return 0; }
100#endif
101
102#endif	/* _CPCI_HOTPLUG_H */
103