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 #define to_mcb_bus(b) container_of((b), struct mcb_bus, dev) 45 46 /** 47 * struct mcb_device - MEN Chameleon Bus device 48 * 49 * @bus_list: internal list handling for bus code 50 * @dev: device in kernel representation 51 * @bus: mcb bus the device is plugged to 52 * @subordinate: subordinate MCBus in case of bridge 53 * @is_added: flag to check if device is added to bus 54 * @driver: associated mcb_driver 55 * @id: mcb device id 56 * @inst: instance in Chameleon table 57 * @group: group in Chameleon table 58 * @var: variant in Chameleon table 59 * @bar: BAR in Chameleon table 60 * @rev: revision in Chameleon table 61 * @irq: IRQ resource 62 * @memory: memory resource 63 */ 64 struct mcb_device { 65 struct list_head bus_list; 66 struct device dev; 67 struct mcb_bus *bus; 68 struct mcb_bus *subordinate; 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 }; 80 #define to_mcb_device(x) container_of((x), struct mcb_device, dev) 81 82 /** 83 * struct mcb_driver - MEN Chameleon Bus device driver 84 * 85 * @driver: device_driver 86 * @id_table: mcb id table 87 * @probe: probe callback 88 * @remove: remove callback 89 * @shutdown: shutdown callback 90 */ 91 struct mcb_driver { 92 struct device_driver driver; 93 const struct mcb_device_id *id_table; 94 int (*probe)(struct mcb_device *mdev, const struct mcb_device_id *id); 95 void (*remove)(struct mcb_device *mdev); 96 void (*shutdown)(struct mcb_device *mdev); 97 }; 98 #define to_mcb_driver(x) container_of((x), struct mcb_driver, driver) 99 100 static inline void *mcb_get_drvdata(struct mcb_device *dev) 101 { 102 return dev_get_drvdata(&dev->dev); 103 } 104 105 static inline void mcb_set_drvdata(struct mcb_device *dev, void *data) 106 { 107 dev_set_drvdata(&dev->dev, data); 108 } 109 110 extern int __must_check __mcb_register_driver(struct mcb_driver *drv, 111 struct module *owner, 112 const char *mod_name); 113 #define mcb_register_driver(driver) \ 114 __mcb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) 115 extern void mcb_unregister_driver(struct mcb_driver *driver); 116 #define module_mcb_driver(__mcb_driver) \ 117 module_driver(__mcb_driver, mcb_register_driver, mcb_unregister_driver); 118 extern void mcb_bus_add_devices(const struct mcb_bus *bus); 119 extern int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev); 120 extern struct mcb_bus *mcb_alloc_bus(struct device *carrier); 121 extern struct mcb_bus *mcb_bus_get(struct mcb_bus *bus); 122 extern void mcb_bus_put(struct mcb_bus *bus); 123 extern struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus); 124 extern void mcb_free_dev(struct mcb_device *dev); 125 extern void mcb_release_bus(struct mcb_bus *bus); 126 extern struct resource *mcb_request_mem(struct mcb_device *dev, 127 const char *name); 128 extern void mcb_release_mem(struct resource *mem); 129 extern int mcb_get_irq(struct mcb_device *dev); 130 131 #endif /* _LINUX_MCB_H */ 132