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da36cadf89
Allow drivers to access the slave address ranges. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/* FSI device & driver interfaces
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*
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* Copyright (C) IBM Corporation 2016
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef LINUX_FSI_H
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#define LINUX_FSI_H
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#include <linux/device.h>
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struct fsi_device {
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struct device dev;
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u8 engine_type;
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u8 version;
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u8 unit;
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struct fsi_slave *slave;
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uint32_t addr;
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uint32_t size;
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};
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extern int fsi_device_read(struct fsi_device *dev, uint32_t addr,
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void *val, size_t size);
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extern int fsi_device_write(struct fsi_device *dev, uint32_t addr,
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const void *val, size_t size);
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extern int fsi_device_peek(struct fsi_device *dev, void *val);
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struct fsi_device_id {
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u8 engine_type;
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u8 version;
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};
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#define FSI_VERSION_ANY 0
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#define FSI_DEVICE(t) \
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.engine_type = (t), .version = FSI_VERSION_ANY,
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#define FSI_DEVICE_VERSIONED(t, v) \
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.engine_type = (t), .version = (v),
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struct fsi_driver {
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struct device_driver drv;
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const struct fsi_device_id *id_table;
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};
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#define to_fsi_dev(devp) container_of(devp, struct fsi_device, dev)
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#define to_fsi_drv(drvp) container_of(drvp, struct fsi_driver, drv)
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extern int fsi_driver_register(struct fsi_driver *fsi_drv);
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extern void fsi_driver_unregister(struct fsi_driver *fsi_drv);
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/* module_fsi_driver() - Helper macro for drivers that don't do
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* anything special in module init/exit. This eliminates a lot of
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* boilerplate. Each module may only use this macro once, and
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* calling it replaces module_init() and module_exit()
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*/
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#define module_fsi_driver(__fsi_driver) \
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module_driver(__fsi_driver, fsi_driver_register, \
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fsi_driver_unregister)
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/* direct slave API */
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extern int fsi_slave_claim_range(struct fsi_slave *slave,
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uint32_t addr, uint32_t size);
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extern void fsi_slave_release_range(struct fsi_slave *slave,
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uint32_t addr, uint32_t size);
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extern int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,
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void *val, size_t size);
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extern int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
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const void *val, size_t size);
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extern struct bus_type fsi_bus_type;
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#endif /* LINUX_FSI_H */
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