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 #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
  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
  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
 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
 109 static inline void *mcb_get_drvdata(struct mcb_device *dev)
 110 {
 111         return dev_get_drvdata(&dev->dev);
 112 }
 113
 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 extern struct resource *mcb_get_resource(struct mcb_device *dev,
 140                                          unsigned int type);
 141
 142 #endif /* _LINUX_MCB_H */