1 /*
2 * MEN Chameleon Bus.
3 *
4 * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
5 * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; version 2 of the License.
10 */
11 #ifndef _LINUX_MCB_H
12 #define _LINUX_MCB_H
13
14 #include <linux/mod_devicetable.h>
15 #include <linux/device.h>
16 #include <linux/irqreturn.h>
17
18 #define CHAMELEON_FILENAME_LEN 12
19
20 struct mcb_driver;
21 struct mcb_device;
22
23 /**
24 * struct mcb_bus - MEN Chameleon Bus
25 *
26 * @dev: bus device
27 * @carrier: pointer to carrier device
28 * @bus_nr: mcb bus number
29 * @get_irq: callback to get IRQ number
30 * @revision: the FPGA's revision number
31 * @model: the FPGA's model number
32 * @filename: the FPGA's name
33 */
34 struct mcb_bus {
35 struct device dev;
36 struct device *carrier;
37 int bus_nr;
38 u8 revision;
39 char model;
40 u8 minor;
41 char name[CHAMELEON_FILENAME_LEN + 1];
42 int (*get_irq)(struct mcb_device *dev);
43 };
44
to_mcb_bus(struct device * dev)45 static inline struct mcb_bus *to_mcb_bus(struct device *dev)
46 {
47 return container_of(dev, struct mcb_bus, dev);
48 }
49
50 /**
51 * struct mcb_device - MEN Chameleon Bus device
52 *
53 * @dev: device in kernel representation
54 * @bus: mcb bus the device is plugged to
55 * @is_added: flag to check if device is added to bus
56 * @driver: associated mcb_driver
57 * @id: mcb device id
58 * @inst: instance in Chameleon table
59 * @group: group in Chameleon table
60 * @var: variant in Chameleon table
61 * @bar: BAR in Chameleon table
62 * @rev: revision in Chameleon table
63 * @irq: IRQ resource
64 * @memory: memory resource
65 */
66 struct mcb_device {
67 struct device dev;
68 struct mcb_bus *bus;
69 bool is_added;
70 struct mcb_driver *driver;
71 u16 id;
72 int inst;
73 int group;
74 int var;
75 int bar;
76 int rev;
77 struct resource irq;
78 struct resource mem;
79 struct device *dma_dev;
80 };
81
to_mcb_device(struct device * dev)82 static inline struct mcb_device *to_mcb_device(struct device *dev)
83 {
84 return container_of(dev, struct mcb_device, dev);
85 }
86
87 /**
88 * struct mcb_driver - MEN Chameleon Bus device driver
89 *
90 * @driver: device_driver
91 * @id_table: mcb id table
92 * @probe: probe callback
93 * @remove: remove callback
94 * @shutdown: shutdown callback
95 */
96 struct mcb_driver {
97 struct device_driver driver;
98 const struct mcb_device_id *id_table;
99 int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
100 void (*remove)(struct mcb_device *mdev);
101 void (*shutdown)(struct mcb_device *mdev);
102 };
103
to_mcb_driver(struct device_driver * drv)104 static inline struct mcb_driver *to_mcb_driver(struct device_driver *drv)
105 {
106 return container_of(drv, struct mcb_driver, driver);
107 }
108
mcb_get_drvdata(struct mcb_device * dev)109 static inline void *mcb_get_drvdata(struct mcb_device *dev)
110 {
111 return dev_get_drvdata(&dev->dev);
112 }
113
mcb_set_drvdata(struct mcb_device * dev,void * data)114 static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
115 {
116 dev_set_drvdata(&dev->dev, data);
117 }
118
119 extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
120 struct module *owner,
121 const char *mod_name);
122 #define mcb_register_driver(driver) \
123 __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
124 extern void mcb_unregister_driver(struct mcb_driver *driver);
125 #define module_mcb_driver(__mcb_driver) \
126 module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver);
127 extern void mcb_bus_add_devices(const struct mcb_bus *bus);
128 extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
129 extern struct mcb_bus *mcb_alloc_bus(struct device *carrier);
130 extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
131 extern void mcb_bus_put(struct mcb_bus *bus);
132 extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
133 extern void mcb_free_dev(struct mcb_device *dev);
134 extern void mcb_release_bus(struct mcb_bus *bus);
135 extern struct resource *mcb_request_mem(struct mcb_device *dev,
136 const char *name);
137 extern void mcb_release_mem(struct resource *mem);
138 extern int mcb_get_irq(struct mcb_device *dev);
139
140 #endif /* _LINUX_MCB_H */
141