diff options
Diffstat (limited to 'drivers/hid/intel-ish-hid/ishtp/bus.h')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ishtp/bus.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.h b/drivers/hid/intel-ish-hid/ishtp/bus.h new file mode 100644 index 000000000..5bb85c932 --- /dev/null +++ b/drivers/hid/intel-ish-hid/ishtp/bus.h @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * ISHTP bus definitions + * + * Copyright (c) 2014-2016, Intel Corporation. + */ +#ifndef _LINUX_ISHTP_CL_BUS_H +#define _LINUX_ISHTP_CL_BUS_H + +#include <linux/device.h> +#include <linux/mod_devicetable.h> +#include <linux/intel-ish-client-if.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); +}; + +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); + +int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const guid_t *cuuid); +#endif /* _LINUX_ISHTP_CL_BUS_H */ |