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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __MACIO_ASIC_H__
3#define __MACIO_ASIC_H__
4#ifdef __KERNEL__
5
6#include <linux/of.h>
7#include <linux/platform_device.h>
8
9extern const struct bus_type macio_bus_type;
10
11/* MacIO device driver is defined later */
12struct macio_driver;
13struct macio_chip;
14
15#define MACIO_DEV_COUNT_RESOURCES 8
16#define MACIO_DEV_COUNT_IRQS 8
17
18/*
19 * the macio_bus structure is used to describe a "virtual" bus
20 * within a MacIO ASIC. It's typically provided by a macio_pci_asic
21 * PCI device, but could be provided differently as well (nubus
22 * machines using a fake OF tree).
23 *
24 * The pdev field can be NULL on non-PCI machines
25 */
26struct macio_bus
27{
28 struct macio_chip *chip; /* macio_chip (private use) */
29 int index; /* macio chip index in system */
30#ifdef CONFIG_PCI
31 struct pci_dev *pdev; /* PCI device hosting this bus */
32#endif
33};
34
35/*
36 * the macio_dev structure is used to describe a device
37 * within an Apple MacIO ASIC.
38 */
39struct macio_dev
40{
41 struct macio_bus *bus; /* macio bus this device is on */
42 struct macio_dev *media_bay; /* Device is part of a media bay */
43 struct platform_device ofdev;
44 struct device_dma_parameters dma_parms; /* ide needs that */
45 int n_resources;
46 struct resource resource[MACIO_DEV_COUNT_RESOURCES];
47 int n_interrupts;
48 struct resource interrupt[MACIO_DEV_COUNT_IRQS];
49};
50#define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
51#define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
52
53extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
54extern void macio_dev_put(struct macio_dev *dev);
55
56/*
57 * Accessors to resources & interrupts and other device
58 * fields
59 */
60
61static inline int macio_resource_count(struct macio_dev *dev)
62{
63 return dev->n_resources;
64}
65
66static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
67{
68 return dev->resource[resource_no].start;
69}
70
71static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
72{
73 return dev->resource[resource_no].end;
74}
75
76static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
77{
78 struct resource *res = &dev->resource[resource_no];
79 if (res->start == 0 || res->end == 0 || res->end < res->start)
80 return 0;
81 return resource_size(res);
82}
83
84extern int macio_enable_devres(struct macio_dev *dev);
85
86extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
87extern void macio_release_resource(struct macio_dev *dev, int resource_no);
88extern int macio_request_resources(struct macio_dev *dev, const char *name);
89extern void macio_release_resources(struct macio_dev *dev);
90
91static inline int macio_irq_count(struct macio_dev *dev)
92{
93 return dev->n_interrupts;
94}
95
96static inline int macio_irq(struct macio_dev *dev, int irq_no)
97{
98 return dev->interrupt[irq_no].start;
99}
100
101static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
102{
103 dev_set_drvdata(&dev->ofdev.dev, data);
104}
105
106static inline void* macio_get_drvdata(struct macio_dev *dev)
107{
108 return dev_get_drvdata(&dev->ofdev.dev);
109}
110
111static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
112{
113 return mdev->ofdev.dev.of_node;
114}
115
116#ifdef CONFIG_PCI
117static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
118{
119 return mdev->bus->pdev;
120}
121#endif
122
123/*
124 * A driver for a mac-io chip based device
125 */
126struct macio_driver
127{
128 int (*probe)(struct macio_dev* dev, const struct of_device_id *match);
129 void (*remove)(struct macio_dev *dev);
130
131 int (*suspend)(struct macio_dev* dev, pm_message_t state);
132 int (*resume)(struct macio_dev* dev);
133 int (*shutdown)(struct macio_dev* dev);
134
135#ifdef CONFIG_PMAC_MEDIABAY
136 void (*mediabay_event)(struct macio_dev* dev, int mb_state);
137#endif
138 struct device_driver driver;
139};
140#define to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
141
142extern int macio_register_driver(struct macio_driver *);
143extern void macio_unregister_driver(struct macio_driver *);
144
145#endif /* __KERNEL__ */
146#endif /* __MACIO_ASIC_H__ */