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