115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/*
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* ISHTP bus definitions
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*
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* Copyright (c) 2014-2016, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _LINUX_ISHTP_CL_BUS_H
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#define _LINUX_ISHTP_CL_BUS_H
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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struct ishtp_cl;
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struct ishtp_cl_device;
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struct ishtp_device;
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struct ishtp_msg_hdr;
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/**
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* struct ishtp_cl_device - ISHTP device handle
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* @dev: device pointer
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* @ishtp_dev: pointer to ishtp device structure to primarily to access
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* hw device operation callbacks and properties
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* @fw_client: fw_client pointer to get fw information like protocol name
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* max message length etc.
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* @device_link: Link to next client in the list on a bus
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* @event_work: Used to schedule rx event for client
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* @driver_data: Storage driver private data
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* @reference_count: Used for get/put device
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* @event_cb: Callback to driver to send events
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*
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* An ishtp_cl_device pointer is returned from ishtp_add_device()
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* and links ISHTP bus clients to their actual host client pointer.
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* Drivers for ISHTP devices will get an ishtp_cl_device pointer
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* when being probed and shall use it for doing bus I/O.
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*/
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struct ishtp_cl_device {
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struct device dev;
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struct ishtp_device *ishtp_dev;
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struct ishtp_fw_client *fw_client;
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struct list_head device_link;
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struct work_struct event_work;
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void *driver_data;
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int reference_count;
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void (*event_cb)(struct ishtp_cl_device *device);
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};
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/**
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* struct ishtp_cl_device - ISHTP device handle
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* @driver: driver instance on a bus
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* @name: Name of the device for probe
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* @probe: driver callback for device probe
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* @remove: driver callback on device removal
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*
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* Client drivers defines to get probed/removed for ISHTP client device.
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*/
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struct ishtp_cl_driver {
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struct device_driver driver;
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const char *name;
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int (*probe)(struct ishtp_cl_device *dev);
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int (*remove)(struct ishtp_cl_device *dev);
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int (*reset)(struct ishtp_cl_device *dev);
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const struct dev_pm_ops *pm;
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};
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int ishtp_bus_new_client(struct ishtp_device *dev);
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void ishtp_remove_all_clients(struct ishtp_device *dev);
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int ishtp_cl_device_bind(struct ishtp_cl *cl);
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void ishtp_cl_bus_rx_event(struct ishtp_cl_device *device);
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/* Write a multi-fragment message */
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int ishtp_send_msg(struct ishtp_device *dev,
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struct ishtp_msg_hdr *hdr, void *msg,
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void (*ipc_send_compl)(void *),
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void *ipc_send_compl_prm);
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/* Write a single-fragment message */
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int ishtp_write_message(struct ishtp_device *dev,
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struct ishtp_msg_hdr *hdr,
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unsigned char *buf);
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/* Use DMA to send/receive messages */
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int ishtp_use_dma_transfer(void);
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/* Exported functions */
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void ishtp_bus_remove_all_clients(struct ishtp_device *ishtp_dev,
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bool warm_reset);
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void ishtp_recv(struct ishtp_device *dev);
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void ishtp_reset_handler(struct ishtp_device *dev);
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void ishtp_reset_compl_handler(struct ishtp_device *dev);
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void ishtp_put_device(struct ishtp_cl_device *);
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void ishtp_get_device(struct ishtp_cl_device *);
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int __ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
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struct module *owner);
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#define ishtp_cl_driver_register(driver) \
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__ishtp_cl_driver_register(driver, THIS_MODULE)
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void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver);
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int ishtp_register_event_cb(struct ishtp_cl_device *device,
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void (*read_cb)(struct ishtp_cl_device *));
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int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const uuid_le *cuuid);
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#endif /* _LINUX_ISHTP_CL_BUS_H */
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