Quelle fsi.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0-only */
/* FSI device & driver interfaces
*
* Copyright (C) IBM Corporation 2016
*/

#ifndef LINUX_FSI_H
#define LINUX_FSI_H

#include <linux/device.h>

struct fsi_device {
struct device  dev;
u8   engine_type;
u8   version;
u8   unit;
struct fsi_slave *slave;
uint32_t  addr;
uint32_t  size;
};

extern int fsi_device_read(struct fsi_device *dev, uint32_t addr,
  void *val, size_t size);
extern int fsi_device_write(struct fsi_device *dev, uint32_t addr,
  const void *val, size_t size);
extern int fsi_device_peek(struct fsi_device *dev, void *val);

struct fsi_device_id {
u8 engine_type;
u8 version;
};

#define FSI_VERSION_ANY  0

#define FSI_DEVICE(t) \
.engine_type = (t), .version = FSI_VERSION_ANY,

#define FSI_DEVICE_VERSIONED(t, v) \
.engine_type = (t), .version = (v),

struct fsi_driver {
struct device_driver  drv;
const struct fsi_device_id *id_table;
};

#define to_fsi_dev(devp) container_of(devp, struct fsi_device, dev)
#define to_fsi_drv(drvp) container_of_const(drvp, struct fsi_driver, drv)

extern int fsi_driver_register(struct fsi_driver *fsi_drv);
extern void fsi_driver_unregister(struct fsi_driver *fsi_drv);

/* module_fsi_driver() - Helper macro for drivers that don't do
* anything special in module init/exit.  This eliminates a lot of
* boilerplate.  Each module may only use this macro once, and
* calling it replaces module_init() and module_exit()
*/
#define module_fsi_driver(__fsi_driver) \
  module_driver(__fsi_driver, fsi_driver_register, \
    fsi_driver_unregister)

/* direct slave API */
extern int fsi_slave_claim_range(struct fsi_slave *slave,
  uint32_t addr, uint32_t size);
extern void fsi_slave_release_range(struct fsi_slave *slave,
  uint32_t addr, uint32_t size);
extern int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,
  void *val, size_t size);
extern int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
  const void *val, size_t size);

extern const struct bus_type fsi_bus_type;
extern const struct device_type fsi_cdev_type;

enum fsi_dev_type {
fsi_dev_cfam,
fsi_dev_sbefifo,
fsi_dev_scom,
fsi_dev_occ
};

extern int fsi_get_new_minor(struct fsi_device *fdev, enum fsi_dev_type type,
        dev_t *out_dev, int *out_index);
extern void fsi_free_minor(dev_t dev);

#endif /* LINUX_FSI_H */

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