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
9 extern const struct bus_type macio_bus_type;
10
11 /* MacIO device driver is defined later */
12 struct macio_driver;
13 struct 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 */
26 struct 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 */
39 struct 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
53 extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
54 extern void macio_dev_put(struct macio_dev *dev);
55
56 /*
57 * Accessors to resources & interrupts and other device
58 * fields
59 */
60
61 static inline int macio_resource_count(struct macio_dev *dev)
62 {
63 return dev->n_resources;
64 }
65
66 static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
67 {
68 return dev->resource[resource_no].start;
69 }
70
71 static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
72 {
73 return dev->resource[resource_no].end;
74 }
75
76 static 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
84 extern int macio_enable_devres(struct macio_dev *dev);
85
86 extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
87 extern void macio_release_resource(struct macio_dev *dev, int resource_no);
88 extern int macio_request_resources(struct macio_dev *dev, const char *name);
89 extern void macio_release_resources(struct macio_dev *dev);
90
91 static inline int macio_irq_count(struct macio_dev *dev)
92 {
93 return dev->n_interrupts;
94 }
95
96 static inline int macio_irq(struct macio_dev *dev, int irq_no)
97 {
98 return dev->interrupt[irq_no].start;
99 }
100
101 static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
102 {
103 dev_set_drvdata(&dev->ofdev.dev, data);
104 }
105
106 static inline void* macio_get_drvdata(struct macio_dev *dev)
107 {
108 return dev_get_drvdata(&dev->ofdev.dev);
109 }
110
111 static 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
117 static 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 */
126 struct 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
142 extern int macio_register_driver(struct macio_driver *);
143 extern void macio_unregister_driver(struct macio_driver *);
144
145 #endif /* __KERNEL__ */
146 #endif /* __MACIO_ASIC_H__ */
147
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