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 struct mcb_device;
  20
  21 /**
  22  * struct mcb_bus - MEN Chameleon Bus
  23  *
  24  * @dev: pointer to carrier device
  25  * @children: the child busses
  26  * @bus_nr: mcb bus number
  27  * @get_irq: callback to get IRQ number
  28  */
  29 struct mcb_bus {
  30         struct list_head children;
  31         struct device dev;
  32         struct device *carrier;
  33         int bus_nr;
  34         int (*get_irq)(struct mcb_device *dev);
  35 };
  36 #define to_mcb_bus(b) container_of((b), struct mcb_bus, dev)
  37
  38 /**
  39  * struct mcb_device - MEN Chameleon Bus device
  40  *
  41  * @bus_list: internal list handling for bus code
  42  * @dev: device in kernel representation
  43  * @bus: mcb bus the device is plugged to
  44  * @subordinate: subordinate MCBus in case of bridge
  45  * @is_added: flag to check if device is added to bus
  46  * @driver: associated mcb_driver
  47  * @id: mcb device id
  48  * @inst: instance in Chameleon table
  49  * @group: group in Chameleon table
  50  * @var: variant in Chameleon table
  51  * @bar: BAR in Chameleon table
  52  * @rev: revision in Chameleon table
  53  * @irq: IRQ resource
  54  * @memory: memory resource
  55  */
  56 struct mcb_device {
  57         struct list_head bus_list;
  58         struct device dev;
  59         struct mcb_bus *bus;
  60         struct mcb_bus *subordinate;
  61         bool is_added;
  62         struct mcb_driver *driver;
  63         u16 id;
  64         int inst;
  65         int group;
  66         int var;
  67         int bar;
  68         int rev;
  69         struct resource irq;
  70         struct resource mem;
  71 };
  72 #define to_mcb_device(x) container_of((x), struct mcb_device, dev)
  73
  74 /**
  75  * struct mcb_driver - MEN Chameleon Bus device driver
  76  *
  77  * @driver: device_driver
  78  * @id_table: mcb id table
  79  * @probe: probe callback
  80  * @remove: remove callback
  81  * @shutdown: shutdown callback
  82  */
  83 struct mcb_driver {
  84         struct device_driver driver;
  85         const struct mcb_device_id *id_table;
  86         int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
  87         void (*remove)(struct mcb_device *mdev);
  88         void (*shutdown)(struct mcb_device *mdev);
  89 };
  90 #define to_mcb_driver(x) container_of((x), struct mcb_driver, driver)
  91
  92 static inline void *mcb_get_drvdata(struct mcb_device *dev)
  93 {
  94         return dev_get_drvdata(&dev->dev);
  95 }
  96
  97 static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
  98 {
  99         dev_set_drvdata(&dev->dev, data);
 100 }
 101
 102 extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
 103                                         struct module *owner,
 104                                         const char *mod_name);
 105 #define mcb_register_driver(driver)             \
 106         __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 107 extern void mcb_unregister_driver(struct mcb_driver *driver);
 108 #define module_mcb_driver(__mcb_driver)         \
 109         module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver);
 110 extern void mcb_bus_add_devices(const struct mcb_bus *bus);
 111 extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
 112 extern struct mcb_bus *mcb_alloc_bus(struct device *carrier);
 113 extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
 114 extern void mcb_bus_put(struct mcb_bus *bus);
 115 extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
 116 extern void mcb_free_dev(struct mcb_device *dev);
 117 extern void mcb_release_bus(struct mcb_bus *bus);
 118 extern struct resource *mcb_request_mem(struct mcb_device *dev,
 119                                         const char *name);
 120 extern void mcb_release_mem(struct resource *mem);
 121 extern int mcb_get_irq(struct mcb_device *dev);
 122
 123 #endif /* _LINUX_MCB_H */