xref: /openbmc/linux/drivers/pci/hotplug/rpaphp.h (revision 125450f8)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
4  *
5  * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
6  *
7  * All rights reserved.
8  *
9  * Send feedback to <lxie@us.ibm.com>,
10  *
11  */
12 
13 #ifndef _PPC64PHP_H
14 #define _PPC64PHP_H
15 
16 #include <linux/pci.h>
17 #include <linux/pci_hotplug.h>
18 
19 #define DR_INDICATOR 9002
20 #define DR_ENTITY_SENSE 9003
21 
22 #define POWER_ON	100
23 #define POWER_OFF	0
24 
25 #define LED_OFF		0
26 #define LED_ON		1	/* continuous on */
27 #define LED_ID		2	/* slow blinking */
28 #define LED_ACTION	3	/* fast blinking */
29 
30 /* Sensor values from rtas_get-sensor */
31 #define EMPTY           0	/* No card in slot */
32 #define PRESENT         1	/* Card in slot */
33 
34 #define MY_NAME "rpaphp"
35 extern bool rpaphp_debug;
36 #define dbg(format, arg...)					\
37 	do {							\
38 		if (rpaphp_debug)				\
39 			printk(KERN_DEBUG "%s: " format,	\
40 				MY_NAME, ## arg);		\
41 	} while (0)
42 #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME, ## arg)
43 #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME, ## arg)
44 #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME, ## arg)
45 
46 /* slot states */
47 
48 #define	NOT_VALID	3
49 #define	NOT_CONFIGURED	2
50 #define	CONFIGURED	1
51 #define	EMPTY		0
52 
53 /* DRC constants */
54 
55 #define MAX_DRC_NAME_LEN 64
56 
57 /*
58  * struct slot - slot information for each *physical* slot
59  */
60 struct slot {
61 	struct list_head rpaphp_slot_list;
62 	int state;
63 	u32 index;
64 	u32 type;
65 	u32 power_domain;
66 	u8 attention_status;
67 	char *name;
68 	struct device_node *dn;
69 	struct pci_bus *bus;
70 	struct list_head *pci_devs;
71 	struct hotplug_slot hotplug_slot;
72 };
73 
74 extern const struct hotplug_slot_ops rpaphp_hotplug_slot_ops;
75 extern struct list_head rpaphp_slot_head;
76 
to_slot(struct hotplug_slot * hotplug_slot)77 static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot)
78 {
79 	return container_of(hotplug_slot, struct slot, hotplug_slot);
80 }
81 
82 /* function prototypes */
83 
84 /* rpaphp_pci.c */
85 int rpaphp_enable_slot(struct slot *slot);
86 int rpaphp_get_sensor_state(struct slot *slot, int *state);
87 
88 /* rpaphp_core.c */
89 int rpaphp_add_slot(struct device_node *dn);
90 int rpaphp_check_drc_props(struct device_node *dn, char *drc_name,
91 		char *drc_type);
92 
93 /* rpaphp_slot.c */
94 void dealloc_slot_struct(struct slot *slot);
95 struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain);
96 int rpaphp_register_slot(struct slot *slot);
97 int rpaphp_deregister_slot(struct slot *slot);
98 
99 #endif				/* _PPC64PHP_H */
100