include/linux/mcb.h

   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
  17 struct mcb_driver;
  18 struct 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  */
  31 struct 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
  42 static 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  */
  63 struct 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 static inline struct mcb_device *to_mcb_device(struct device *dev)
  80 {
  81         return container_of(dev, struct mcb_device, dev);
  82 }
  83
  84 /**
  85  * struct mcb_driver - MEN Chameleon Bus device driver
  86  *
  87  * @driver: device_driver
  88  * @id_table: mcb id table
  89  * @probe: probe callback
  90  * @remove: remove callback
  91  * @shutdown: shutdown callback
  92  */
  93 struct mcb_driver {
  94         struct device_driver driver;
  95         const struct mcb_device_id *id_table;
  96         int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id);
  97         void (*remove)(struct mcb_device *mdev);
  98         void (*shutdown)(struct mcb_device *mdev);
  99 };
 100
 101 static inline struct mcb_driver *to_mcb_driver(struct device_driver *drv)
 102 {
 103         return container_of(drv, struct mcb_driver, driver);
 104 }
 105
 106 static inline void *mcb_get_drvdata(struct mcb_device *dev)
 107 {
 108         return dev_get_drvdata(&dev->dev);
 109 }
 110
 111 static inline void mcb_set_drvdata(struct mcb_device *dev, void *data)
 112 {
 113         dev_set_drvdata(&dev->dev, data);
 114 }
 115
 116 extern int __must_check __mcb_register_driver(struct mcb_driver *drv,
 117                                         struct module *owner,
 118                                         const char *mod_name);
 119 #define mcb_register_driver(driver)             \
 120         __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 121 extern void mcb_unregister_driver(struct mcb_driver *driver);
 122 #define module_mcb_driver(__mcb_driver)         \
 123         module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver);
 124 extern void mcb_bus_add_devices(const struct mcb_bus *bus);
 125 extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev);
 126 extern struct mcb_bus *mcb_alloc_bus(struct device *carrier);
 127 extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus);
 128 extern void mcb_bus_put(struct mcb_bus *bus);
 129 extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus);
 130 extern void mcb_free_dev(struct mcb_device *dev);
 131 extern void mcb_release_bus(struct mcb_bus *bus);
 132 extern struct resource *mcb_request_mem(struct mcb_device *dev,
 133                                         const char *name);
 134 extern void mcb_release_mem(struct resource *mem);
 135 extern int mcb_get_irq(struct mcb_device *dev);
 136 extern struct resource *mcb_get_resource(struct mcb_device *dev,
 137                                          unsigned int type);
 138
 139 #endif /* _LINUX_MCB_H */