include/linux/mcb.h

   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 struct mcb_driver;
  19
  20 /**
  21  * struct mcb_bus - MEN Chameleon Bus
  22  *
  23  * @dev: pointer to carrier device
  24  * @children: the child busses
  25  * @bus_nr: mcb bus number
  26  */
  27 struct mcb_bus {
  28         struct list_head children;
  29         struct device dev;
  30         int bus_nr;
  31 };
  32 #define to_mcb_bus(b) container_of((b), struct mcb_bus, dev)
  33
  34 /**
  35  * struct mcb_device - MEN Chameleon Bus device
  36  *
  37  * @bus_list: internal list handling for bus code
  38  * @dev: device in kernel representation
  39  * @bus: mcb bus the device is plugged to
  40  * @subordinate: subordinate MCBus in case of bridge
  41  * @is_added: flag to check if device is added to bus
  42  * @driver: associated mcb_driver
  43  * @id: mcb device id
  44  * @inst: instance in Chameleon table
  45  * @group: group in Chameleon table
  46  * @var: variant in Chameleon table
  47  * @bar: BAR in Chameleon table
  48  * @rev: revision in Chameleon table
  49  * @irq: IRQ resource
  50  * @memory: memory resource
  51  */
  52 struct mcb_device {
  53         struct list_head bus_list;
  54         struct device dev;
  55         struct mcb_bus *bus;
  56         struct mcb_bus *subordinate;
  57         bool is_added;
  58         struct mcb_driver *driver;
  59         u16 id;
  60         int inst;
  61         int group;
  62         int var;
  63         int bar;
  64         int rev;
  65         struct resource irq;
  66         struct resource mem;
  67 };
  68 #define to_mcb_device(x) container_of((x), struct mcb_device, dev)
  69
  70 /**
  71  * struct mcb_driver - MEN Chameleon Bus device driver
  72  *
  73  * @driver: device_driver
  74  * @id_table: mcb id table
  75  * @probe: probe callback
  76  * @remove: remove callback
  77  * @shutdown: shutdown callback
  78  */
  79 struct mcb_driver {
  80         struct device_driver driver;
  81         const struct mcb_device_id *id_table;
  82         int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
  83         void (*remove)(struct mcb_device *mdev);
  84         void (*shutdown)(struct mcb_device *mdev);
  85 };
  86 #define to_mcb_driver(x) container_of((x), struct mcb_driver, driver)
  87
  88 static inline void *mcb_get_drvdata(struct mcb_device *dev)
  89 {
  90         return dev_get_drvdata(&dev->dev);
  91 }
  92
  93 static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
  94 {
  95         dev_set_drvdata(&dev->dev, data);
  96 }
  97
  98 extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
  99                                         struct module *owner,
 100                                         const char *mod_name);
 101 #define mcb_register_driver(driver)             \
 102         __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 103 extern void mcb_unregister_driver(struct mcb_driver *driver);
 104 #define module_mcb_driver(__mcb_driver)         \
 105         module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver);
 106 extern void mcb_bus_add_devices(const struct mcb_bus *bus);
 107 extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
 108 extern struct mcb_bus *mcb_alloc_bus(void);
 109 extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
 110 extern void mcb_bus_put(struct mcb_bus *bus);
 111 extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
 112 extern void mcb_free_dev(struct mcb_device *dev);
 113 extern void mcb_release_bus(struct mcb_bus *bus);
 114 extern struct resource *mcb_request_mem(struct mcb_device *dev,
 115                                         const char *name);
 116 extern void mcb_release_mem(struct resource *mem);
 117 extern int mcb_get_irq(struct mcb_device *dev);
 118
 119 #endif /* _LINUX_MCB_H */