drivers/hid/intel-ish-hid/ishtp/hbm.h

   1 /*
   2  * ISHTP bus layer messages handling
   3  *
   4  * Copyright (c) 2003-2016, Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  */
  15
  16 #ifndef _ISHTP_HBM_H_
  17 #define _ISHTP_HBM_H_
  18
  19 #include <linux/uuid.h>
  20
  21 struct ishtp_device;
  22 struct ishtp_msg_hdr;
  23 struct ishtp_cl;
  24
  25 /*
  26  * Timeouts in Seconds
  27  */
  28 #define ISHTP_INTEROP_TIMEOUT           7 /* Timeout on ready message */
  29
  30 #define ISHTP_CL_CONNECT_TIMEOUT        15 /* HPS: Client Connect Timeout */
  31
  32 /*
  33  * ISHTP Version
  34  */
  35 #define HBM_MINOR_VERSION               0
  36 #define HBM_MAJOR_VERSION               1
  37
  38 /* Host bus message command opcode */
  39 #define ISHTP_HBM_CMD_OP_MSK            0x7f
  40 /* Host bus message command RESPONSE */
  41 #define ISHTP_HBM_CMD_RES_MSK           0x80
  42
  43 /*
  44  * ISHTP Bus Message Command IDs
  45  */
  46 #define HOST_START_REQ_CMD              0x01
  47 #define HOST_START_RES_CMD              0x81
  48
  49 #define HOST_STOP_REQ_CMD               0x02
  50 #define HOST_STOP_RES_CMD               0x82
  51
  52 #define FW_STOP_REQ_CMD                 0x03
  53
  54 #define HOST_ENUM_REQ_CMD               0x04
  55 #define HOST_ENUM_RES_CMD               0x84
  56
  57 #define HOST_CLIENT_PROPERTIES_REQ_CMD  0x05
  58 #define HOST_CLIENT_PROPERTIES_RES_CMD  0x85
  59
  60 #define CLIENT_CONNECT_REQ_CMD          0x06
  61 #define CLIENT_CONNECT_RES_CMD          0x86
  62
  63 #define CLIENT_DISCONNECT_REQ_CMD       0x07
  64 #define CLIENT_DISCONNECT_RES_CMD       0x87
  65
  66 #define ISHTP_FLOW_CONTROL_CMD          0x08
  67
  68 #define DMA_BUFFER_ALLOC_NOTIFY         0x11
  69 #define DMA_BUFFER_ALLOC_RESPONSE       0x91
  70
  71 #define DMA_XFER                        0x12
  72 #define DMA_XFER_ACK                    0x92
  73
  74 /*
  75  * ISHTP Stop Reason
  76  * used by hbm_host_stop_request.reason
  77  */
  78 #define DRIVER_STOP_REQUEST             0x00
  79
  80 /*
  81  * ISHTP BUS Interface Section
  82  */
  83 struct ishtp_msg_hdr {
  84         uint32_t fw_addr:8;
  85         uint32_t host_addr:8;
  86         uint32_t length:9;
  87         uint32_t reserved:6;
  88         uint32_t msg_complete:1;
  89 } __packed;
  90
  91 struct ishtp_bus_message {
  92         uint8_t hbm_cmd;
  93         uint8_t data[0];
  94 } __packed;
  95
  96 /**
  97  * struct hbm_cl_cmd - client specific host bus command
  98  *      CONNECT, DISCONNECT, and FlOW CONTROL
  99  *
 100  * @hbm_cmd - bus message command header
 101  * @fw_addr - address of the fw client
 102  * @host_addr - address of the client in the driver
 103  * @data
 104  */
 105 struct ishtp_hbm_cl_cmd {
 106         uint8_t hbm_cmd;
 107         uint8_t fw_addr;
 108         uint8_t host_addr;
 109         uint8_t data;
 110 };
 111
 112 struct hbm_version {
 113         uint8_t minor_version;
 114         uint8_t major_version;
 115 } __packed;
 116
 117 struct hbm_host_version_request {
 118         uint8_t hbm_cmd;
 119         uint8_t reserved;
 120         struct hbm_version host_version;
 121 } __packed;
 122
 123 struct hbm_host_version_response {
 124         uint8_t hbm_cmd;
 125         uint8_t host_version_supported;
 126         struct hbm_version fw_max_version;
 127 } __packed;
 128
 129 struct hbm_host_stop_request {
 130         uint8_t hbm_cmd;
 131         uint8_t reason;
 132         uint8_t reserved[2];
 133 } __packed;
 134
 135 struct hbm_host_stop_response {
 136         uint8_t hbm_cmd;
 137         uint8_t reserved[3];
 138 } __packed;
 139
 140 struct hbm_host_enum_request {
 141         uint8_t hbm_cmd;
 142         uint8_t reserved[3];
 143 } __packed;
 144
 145 struct hbm_host_enum_response {
 146         uint8_t hbm_cmd;
 147         uint8_t reserved[3];
 148         uint8_t valid_addresses[32];
 149 } __packed;
 150
 151 struct ishtp_client_properties {
 152         uuid_le protocol_name;
 153         uint8_t protocol_version;
 154         uint8_t max_number_of_connections;
 155         uint8_t fixed_address;
 156         uint8_t single_recv_buf;
 157         uint32_t max_msg_length;
 158         uint8_t dma_hdr_len;
 159 #define ISHTP_CLIENT_DMA_ENABLED        0x80
 160         uint8_t reserved4;
 161         uint8_t reserved5;
 162         uint8_t reserved6;
 163 } __packed;
 164
 165 struct hbm_props_request {
 166         uint8_t hbm_cmd;
 167         uint8_t address;
 168         uint8_t reserved[2];
 169 } __packed;
 170
 171 struct hbm_props_response {
 172         uint8_t hbm_cmd;
 173         uint8_t address;
 174         uint8_t status;
 175         uint8_t reserved[1];
 176         struct ishtp_client_properties client_properties;
 177 } __packed;
 178
 179 /**
 180  * struct hbm_client_connect_request - connect/disconnect request
 181  *
 182  * @hbm_cmd - bus message command header
 183  * @fw_addr - address of the fw client
 184  * @host_addr - address of the client in the driver
 185  * @reserved
 186  */
 187 struct hbm_client_connect_request {
 188         uint8_t hbm_cmd;
 189         uint8_t fw_addr;
 190         uint8_t host_addr;
 191         uint8_t reserved;
 192 } __packed;
 193
 194 /**
 195  * struct hbm_client_connect_response - connect/disconnect response
 196  *
 197  * @hbm_cmd - bus message command header
 198  * @fw_addr - address of the fw client
 199  * @host_addr - address of the client in the driver
 200  * @status - status of the request
 201  */
 202 struct hbm_client_connect_response {
 203         uint8_t hbm_cmd;
 204         uint8_t fw_addr;
 205         uint8_t host_addr;
 206         uint8_t status;
 207 } __packed;
 208
 209
 210 #define ISHTP_FC_MESSAGE_RESERVED_LENGTH                5
 211
 212 struct hbm_flow_control {
 213         uint8_t hbm_cmd;
 214         uint8_t fw_addr;
 215         uint8_t host_addr;
 216         uint8_t reserved[ISHTP_FC_MESSAGE_RESERVED_LENGTH];
 217 } __packed;
 218
 219 struct dma_alloc_notify {
 220         uint8_t hbm;
 221         uint8_t status;
 222         uint8_t reserved[2];
 223         uint32_t buf_size;
 224         uint64_t buf_address;
 225         /* [...] May come more size/address pairs */
 226 } __packed;
 227
 228 struct dma_xfer_hbm {
 229         uint8_t hbm;
 230         uint8_t fw_client_id;
 231         uint8_t host_client_id;
 232         uint8_t reserved;
 233         uint64_t msg_addr;
 234         uint32_t msg_length;
 235         uint32_t reserved2;
 236 } __packed;
 237
 238 /* System state */
 239 #define ISHTP_SYSTEM_STATE_CLIENT_ADDR          13
 240
 241 #define SYSTEM_STATE_SUBSCRIBE                  0x1
 242 #define SYSTEM_STATE_STATUS                     0x2
 243 #define SYSTEM_STATE_QUERY_SUBSCRIBERS          0x3
 244 #define SYSTEM_STATE_STATE_CHANGE_REQ           0x4
 245 /*indicates suspend and resume states*/
 246 #define SUSPEND_STATE_BIT                       (1<<1)
 247
 248 struct ish_system_states_header {
 249         uint32_t cmd;
 250         uint32_t cmd_status;    /*responses will have this set*/
 251 } __packed;
 252
 253 struct ish_system_states_subscribe {
 254         struct ish_system_states_header hdr;
 255         uint32_t states;
 256 } __packed;
 257
 258 struct ish_system_states_status {
 259         struct ish_system_states_header hdr;
 260         uint32_t supported_states;
 261         uint32_t states_status;
 262 } __packed;
 263
 264 struct ish_system_states_query_subscribers {
 265         struct ish_system_states_header hdr;
 266 } __packed;
 267
 268 struct ish_system_states_state_change_req {
 269         struct ish_system_states_header hdr;
 270         uint32_t requested_states;
 271         uint32_t states_status;
 272 } __packed;
 273
 274 /**
 275  * enum ishtp_hbm_state - host bus message protocol state
 276  *
 277  * @ISHTP_HBM_IDLE : protocol not started
 278  * @ISHTP_HBM_START : start request message was sent
 279  * @ISHTP_HBM_ENUM_CLIENTS : enumeration request was sent
 280  * @ISHTP_HBM_CLIENT_PROPERTIES : acquiring clients properties
 281  */
 282 enum ishtp_hbm_state {
 283         ISHTP_HBM_IDLE = 0,
 284         ISHTP_HBM_START,
 285         ISHTP_HBM_STARTED,
 286         ISHTP_HBM_ENUM_CLIENTS,
 287         ISHTP_HBM_CLIENT_PROPERTIES,
 288         ISHTP_HBM_WORKING,
 289         ISHTP_HBM_STOPPED,
 290 };
 291
 292 static inline void ishtp_hbm_hdr(struct ishtp_msg_hdr *hdr, size_t length)
 293 {
 294         hdr->host_addr = 0;
 295         hdr->fw_addr = 0;
 296         hdr->length = length;
 297         hdr->msg_complete = 1;
 298         hdr->reserved = 0;
 299 }
 300
 301 int ishtp_hbm_start_req(struct ishtp_device *dev);
 302 int ishtp_hbm_start_wait(struct ishtp_device *dev);
 303 int ishtp_hbm_cl_flow_control_req(struct ishtp_device *dev,
 304                                   struct ishtp_cl *cl);
 305 int ishtp_hbm_cl_disconnect_req(struct ishtp_device *dev, struct ishtp_cl *cl);
 306 int ishtp_hbm_cl_connect_req(struct ishtp_device *dev, struct ishtp_cl *cl);
 307 void ishtp_hbm_enum_clients_req(struct ishtp_device *dev);
 308 void bh_hbm_work_fn(struct work_struct *work);
 309 void recv_hbm(struct ishtp_device *dev, struct ishtp_msg_hdr *ishtp_hdr);
 310 void recv_fixed_cl_msg(struct ishtp_device *dev,
 311         struct ishtp_msg_hdr *ishtp_hdr);
 312 void ishtp_hbm_dispatch(struct ishtp_device *dev,
 313         struct ishtp_bus_message *hdr);
 314
 315 void ishtp_query_subscribers(struct ishtp_device *dev);
 316
 317 /* Exported I/F */
 318 void ishtp_send_suspend(struct ishtp_device *dev);
 319 void ishtp_send_resume(struct ishtp_device *dev);
 320
 321 #endif /* _ISHTP_HBM_H_ */