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Diffstat (limited to '')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ishtp/hbm.h | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp/hbm.h b/drivers/hid/intel-ish-hid/ishtp/hbm.h new file mode 100644 index 000000000..d96111cef --- /dev/null +++ b/drivers/hid/intel-ish-hid/ishtp/hbm.h @@ -0,0 +1,321 @@ +/* + * ISHTP bus layer messages handling + * + * Copyright (c) 2003-2016, 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 _ISHTP_HBM_H_ +#define _ISHTP_HBM_H_ + +#include <linux/uuid.h> + +struct ishtp_device; +struct ishtp_msg_hdr; +struct ishtp_cl; + +/* + * Timeouts in Seconds + */ +#define ISHTP_INTEROP_TIMEOUT 7 /* Timeout on ready message */ + +#define ISHTP_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */ + +/* + * ISHTP Version + */ +#define HBM_MINOR_VERSION 0 +#define HBM_MAJOR_VERSION 1 + +/* Host bus message command opcode */ +#define ISHTP_HBM_CMD_OP_MSK 0x7f +/* Host bus message command RESPONSE */ +#define ISHTP_HBM_CMD_RES_MSK 0x80 + +/* + * ISHTP Bus Message Command IDs + */ +#define HOST_START_REQ_CMD 0x01 +#define HOST_START_RES_CMD 0x81 + +#define HOST_STOP_REQ_CMD 0x02 +#define HOST_STOP_RES_CMD 0x82 + +#define FW_STOP_REQ_CMD 0x03 + +#define HOST_ENUM_REQ_CMD 0x04 +#define HOST_ENUM_RES_CMD 0x84 + +#define HOST_CLIENT_PROPERTIES_REQ_CMD 0x05 +#define HOST_CLIENT_PROPERTIES_RES_CMD 0x85 + +#define CLIENT_CONNECT_REQ_CMD 0x06 +#define CLIENT_CONNECT_RES_CMD 0x86 + +#define CLIENT_DISCONNECT_REQ_CMD 0x07 +#define CLIENT_DISCONNECT_RES_CMD 0x87 + +#define ISHTP_FLOW_CONTROL_CMD 0x08 + +#define DMA_BUFFER_ALLOC_NOTIFY 0x11 +#define DMA_BUFFER_ALLOC_RESPONSE 0x91 + +#define DMA_XFER 0x12 +#define DMA_XFER_ACK 0x92 + +/* + * ISHTP Stop Reason + * used by hbm_host_stop_request.reason + */ +#define DRIVER_STOP_REQUEST 0x00 + +/* + * ISHTP BUS Interface Section + */ +struct ishtp_msg_hdr { + uint32_t fw_addr:8; + uint32_t host_addr:8; + uint32_t length:9; + uint32_t reserved:6; + uint32_t msg_complete:1; +} __packed; + +struct ishtp_bus_message { + uint8_t hbm_cmd; + uint8_t data[0]; +} __packed; + +/** + * struct hbm_cl_cmd - client specific host bus command + * CONNECT, DISCONNECT, and FlOW CONTROL + * + * @hbm_cmd - bus message command header + * @fw_addr - address of the fw client + * @host_addr - address of the client in the driver + * @data + */ +struct ishtp_hbm_cl_cmd { + uint8_t hbm_cmd; + uint8_t fw_addr; + uint8_t host_addr; + uint8_t data; +}; + +struct hbm_version { + uint8_t minor_version; + uint8_t major_version; +} __packed; + +struct hbm_host_version_request { + uint8_t hbm_cmd; + uint8_t reserved; + struct hbm_version host_version; +} __packed; + +struct hbm_host_version_response { + uint8_t hbm_cmd; + uint8_t host_version_supported; + struct hbm_version fw_max_version; +} __packed; + +struct hbm_host_stop_request { + uint8_t hbm_cmd; + uint8_t reason; + uint8_t reserved[2]; +} __packed; + +struct hbm_host_stop_response { + uint8_t hbm_cmd; + uint8_t reserved[3]; +} __packed; + +struct hbm_host_enum_request { + uint8_t hbm_cmd; + uint8_t reserved[3]; +} __packed; + +struct hbm_host_enum_response { + uint8_t hbm_cmd; + uint8_t reserved[3]; + uint8_t valid_addresses[32]; +} __packed; + +struct ishtp_client_properties { + uuid_le protocol_name; + uint8_t protocol_version; + uint8_t max_number_of_connections; + uint8_t fixed_address; + uint8_t single_recv_buf; + uint32_t max_msg_length; + uint8_t dma_hdr_len; +#define ISHTP_CLIENT_DMA_ENABLED 0x80 + uint8_t reserved4; + uint8_t reserved5; + uint8_t reserved6; +} __packed; + +struct hbm_props_request { + uint8_t hbm_cmd; + uint8_t address; + uint8_t reserved[2]; +} __packed; + +struct hbm_props_response { + uint8_t hbm_cmd; + uint8_t address; + uint8_t status; + uint8_t reserved[1]; + struct ishtp_client_properties client_properties; +} __packed; + +/** + * struct hbm_client_connect_request - connect/disconnect request + * + * @hbm_cmd - bus message command header + * @fw_addr - address of the fw client + * @host_addr - address of the client in the driver + * @reserved + */ +struct hbm_client_connect_request { + uint8_t hbm_cmd; + uint8_t fw_addr; + uint8_t host_addr; + uint8_t reserved; +} __packed; + +/** + * struct hbm_client_connect_response - connect/disconnect response + * + * @hbm_cmd - bus message command header + * @fw_addr - address of the fw client + * @host_addr - address of the client in the driver + * @status - status of the request + */ +struct hbm_client_connect_response { + uint8_t hbm_cmd; + uint8_t fw_addr; + uint8_t host_addr; + uint8_t status; +} __packed; + + +#define ISHTP_FC_MESSAGE_RESERVED_LENGTH 5 + +struct hbm_flow_control { + uint8_t hbm_cmd; + uint8_t fw_addr; + uint8_t host_addr; + uint8_t reserved[ISHTP_FC_MESSAGE_RESERVED_LENGTH]; +} __packed; + +struct dma_alloc_notify { + uint8_t hbm; + uint8_t status; + uint8_t reserved[2]; + uint32_t buf_size; + uint64_t buf_address; + /* [...] May come more size/address pairs */ +} __packed; + +struct dma_xfer_hbm { + uint8_t hbm; + uint8_t fw_client_id; + uint8_t host_client_id; + uint8_t reserved; + uint64_t msg_addr; + uint32_t msg_length; + uint32_t reserved2; +} __packed; + +/* System state */ +#define ISHTP_SYSTEM_STATE_CLIENT_ADDR 13 + +#define SYSTEM_STATE_SUBSCRIBE 0x1 +#define SYSTEM_STATE_STATUS 0x2 +#define SYSTEM_STATE_QUERY_SUBSCRIBERS 0x3 +#define SYSTEM_STATE_STATE_CHANGE_REQ 0x4 +/*indicates suspend and resume states*/ +#define SUSPEND_STATE_BIT (1<<1) + +struct ish_system_states_header { + uint32_t cmd; + uint32_t cmd_status; /*responses will have this set*/ +} __packed; + +struct ish_system_states_subscribe { + struct ish_system_states_header hdr; + uint32_t states; +} __packed; + +struct ish_system_states_status { + struct ish_system_states_header hdr; + uint32_t supported_states; + uint32_t states_status; +} __packed; + +struct ish_system_states_query_subscribers { + struct ish_system_states_header hdr; +} __packed; + +struct ish_system_states_state_change_req { + struct ish_system_states_header hdr; + uint32_t requested_states; + uint32_t states_status; +} __packed; + +/** + * enum ishtp_hbm_state - host bus message protocol state + * + * @ISHTP_HBM_IDLE : protocol not started + * @ISHTP_HBM_START : start request message was sent + * @ISHTP_HBM_ENUM_CLIENTS : enumeration request was sent + * @ISHTP_HBM_CLIENT_PROPERTIES : acquiring clients properties + */ +enum ishtp_hbm_state { + ISHTP_HBM_IDLE = 0, + ISHTP_HBM_START, + ISHTP_HBM_STARTED, + ISHTP_HBM_ENUM_CLIENTS, + ISHTP_HBM_CLIENT_PROPERTIES, + ISHTP_HBM_WORKING, + ISHTP_HBM_STOPPED, +}; + +static inline void ishtp_hbm_hdr(struct ishtp_msg_hdr *hdr, size_t length) +{ + hdr->host_addr = 0; + hdr->fw_addr = 0; + hdr->length = length; + hdr->msg_complete = 1; + hdr->reserved = 0; +} + +int ishtp_hbm_start_req(struct ishtp_device *dev); +int ishtp_hbm_start_wait(struct ishtp_device *dev); +int ishtp_hbm_cl_flow_control_req(struct ishtp_device *dev, + struct ishtp_cl *cl); +int ishtp_hbm_cl_disconnect_req(struct ishtp_device *dev, struct ishtp_cl *cl); +int ishtp_hbm_cl_connect_req(struct ishtp_device *dev, struct ishtp_cl *cl); +void ishtp_hbm_enum_clients_req(struct ishtp_device *dev); +void bh_hbm_work_fn(struct work_struct *work); +void recv_hbm(struct ishtp_device *dev, struct ishtp_msg_hdr *ishtp_hdr); +void recv_fixed_cl_msg(struct ishtp_device *dev, + struct ishtp_msg_hdr *ishtp_hdr); +void ishtp_hbm_dispatch(struct ishtp_device *dev, + struct ishtp_bus_message *hdr); + +void ishtp_query_subscribers(struct ishtp_device *dev); + +/* Exported I/F */ +void ishtp_send_suspend(struct ishtp_device *dev); +void ishtp_send_resume(struct ishtp_device *dev); + +#endif /* _ISHTP_HBM_H_ */ |