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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * MEN Chameleon Bus.
4 *
5 * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
6 * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
7 */
8#ifndef _LINUX_MCB_H
9#define _LINUX_MCB_H
10
11#include <linux/mod_devicetable.h>
12#include <linux/device.h>
13#include <linux/irqreturn.h>
14
15#define CHAMELEON_FILENAME_LEN 12
16
17struct mcb_driver;
18struct mcb_device;
19
20/**
21 * struct mcb_bus - MEN Chameleon Bus
22 *
23 * @dev: bus device
24 * @carrier: pointer to carrier device
25 * @bus_nr: mcb bus number
26 * @get_irq: callback to get IRQ number
27 * @revision: the FPGA's revision number
28 * @model: the FPGA's model number
29 * @filename: the FPGA's name
30 */
31struct mcb_bus {
32 struct device dev;
33 struct device *carrier;
34 int bus_nr;
35 u8 revision;
36 char model;
37 u8 minor;
38 char name[CHAMELEON_FILENAME_LEN + 1];
39 int (*get_irq)(struct mcb_device *dev);
40};
41
42static inline struct mcb_bus *to_mcb_bus(struct device *dev)
43{
44 return container_of(dev, struct mcb_bus, dev);
45}
46
47/**
48 * struct mcb_device - MEN Chameleon Bus device
49 *
50 * @dev: device in kernel representation
51 * @bus: mcb bus the device is plugged to
52 * @is_added: flag to check if device is added to bus
53 * @driver: associated mcb_driver
54 * @id: mcb device id
55 * @inst: instance in Chameleon table
56 * @group: group in Chameleon table
57 * @var: variant in Chameleon table
58 * @bar: BAR in Chameleon table
59 * @rev: revision in Chameleon table
60 * @irq: IRQ resource
61 * @memory: memory resource
62 */
63struct mcb_device {
64 struct device dev;
65 struct mcb_bus *bus;
66 bool is_added;
67 struct mcb_driver *driver;
68 u16 id;
69 int inst;
70 int group;
71 int var;
72 int bar;
73 int rev;
74 struct resource irq;
75 struct resource mem;
76 struct device *dma_dev;
77};
78
79#define to_mcb_device(__dev) container_of_const(__dev, struct mcb_device, dev)
80
81/**
82 * struct mcb_driver - MEN Chameleon Bus device driver
83 *
84 * @driver: device_driver
85 * @id_table: mcb id table
86 * @probe: probe callback
87 * @remove: remove callback
88 * @shutdown: shutdown callback
89 */
90struct mcb_driver {
91 struct device_driver driver;
92 const struct mcb_device_id *id_table;
93 int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
94 void (*remove)(struct mcb_device *mdev);
95 void (*shutdown)(struct mcb_device *mdev);
96};
97
98static inline struct mcb_driver *to_mcb_driver(struct device_driver *drv)
99{
100 return container_of(drv, struct mcb_driver, driver);
101}
102
103static inline void *mcb_get_drvdata(struct mcb_device *dev)
104{
105 return dev_get_drvdata(&dev->dev);
106}
107
108static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
109{
110 dev_set_drvdata(&dev->dev, data);
111}
112
113extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
114 struct module *owner,
115 const char *mod_name);
116#define mcb_register_driver(driver) \
117 __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
118extern void mcb_unregister_driver(struct mcb_driver *driver);
119#define module_mcb_driver(__mcb_driver) \
120 module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver)
121extern void mcb_bus_add_devices(const struct mcb_bus *bus);
122extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
123extern struct mcb_bus *mcb_alloc_bus(struct device *carrier);
124extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
125extern void mcb_bus_put(struct mcb_bus *bus);
126extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
127extern void mcb_free_dev(struct mcb_device *dev);
128extern void mcb_release_bus(struct mcb_bus *bus);
129extern struct resource *mcb_request_mem(struct mcb_device *dev,
130 const char *name);
131extern void mcb_release_mem(struct resource *mem);
132extern int mcb_get_irq(struct mcb_device *dev);
133extern struct resource *mcb_get_resource(struct mcb_device *dev,
134 unsigned int type);
135
136#endif /* _LINUX_MCB_H */