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

   1 /*
   2  * ISHTP-HID glue driver's definitions.
   3  *
   4  * Copyright (c) 2014-2016, 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 #ifndef ISHTP_HID__H
  16 #define ISHTP_HID__H
  17
  18 /* The fixed ISH product and vendor id */
  19 #define ISH_HID_VENDOR  0x8086
  20 #define ISH_HID_PRODUCT 0x22D8
  21 #define ISH_HID_VERSION 0x0200
  22
  23 #define CMD_MASK        0x7F
  24 #define IS_RESPONSE     0x80
  25
  26 /* Used to dump to Linux trace buffer, if enabled */
  27 #define hid_ishtp_trace(client, ...)    \
  28         client->cl_device->ishtp_dev->print_log(\
  29                 client->cl_device->ishtp_dev, __VA_ARGS__)
  30
  31 /* ISH Transport protocol (ISHTP in short) GUID */
  32 static const uuid_le hid_ishtp_guid = UUID_LE(0x33AECD58, 0xB679, 0x4E54,
  33                                               0x9B, 0xD9, 0xA0, 0x4D, 0x34,
  34                                               0xF0, 0xC2, 0x26);
  35
  36 /* ISH HID message structure */
  37 struct hostif_msg_hdr {
  38         uint8_t command; /* Bit 7: is_response */
  39         uint8_t device_id;
  40         uint8_t status;
  41         uint8_t flags;
  42         uint16_t size;
  43 } __packed;
  44
  45 struct hostif_msg {
  46         struct hostif_msg_hdr   hdr;
  47 } __packed;
  48
  49 struct hostif_msg_to_sensor {
  50         struct hostif_msg_hdr   hdr;
  51         uint8_t report_id;
  52 } __packed;
  53
  54 struct device_info {
  55         uint32_t dev_id;
  56         uint8_t dev_class;
  57         uint16_t pid;
  58         uint16_t vid;
  59 } __packed;
  60
  61 struct ishtp_version {
  62         uint8_t major;
  63         uint8_t minor;
  64         uint8_t hotfix;
  65         uint16_t build;
  66 } __packed;
  67
  68 /* struct for ISHTP aggregated input data */
  69 struct report_list {
  70         uint16_t total_size;
  71         uint8_t num_of_reports;
  72         uint8_t flags;
  73         struct {
  74                 uint16_t        size_of_report;
  75                 uint8_t report[1];
  76         } __packed reports[1];
  77 } __packed;
  78
  79 /* HOSTIF commands */
  80 #define HOSTIF_HID_COMMAND_BASE                 0
  81 #define HOSTIF_GET_HID_DESCRIPTOR               0
  82 #define HOSTIF_GET_REPORT_DESCRIPTOR            1
  83 #define HOSTIF_GET_FEATURE_REPORT               2
  84 #define HOSTIF_SET_FEATURE_REPORT               3
  85 #define HOSTIF_GET_INPUT_REPORT                 4
  86 #define HOSTIF_PUBLISH_INPUT_REPORT             5
  87 #define HOSTIF_PUBLISH_INPUT_REPORT_LIST        6
  88 #define HOSTIF_DM_COMMAND_BASE                  32
  89 #define HOSTIF_DM_ENUM_DEVICES                  33
  90 #define HOSTIF_DM_ADD_DEVICE                    34
  91
  92 #define MAX_HID_DEVICES                         32
  93
  94 /**
  95  * struct ishtp_cl_data - Encapsulate per ISH TP HID Client
  96  * @enum_device_done:   Enum devices response complete flag
  97  * @hid_descr_done:     HID descriptor complete flag
  98  * @report_descr_done:  Get report descriptor complete flag
  99  * @init_done:          Init process completed successfully
 100  * @suspended:          System is under suspend state or in progress
 101  * @num_hid_devices:    Number of HID devices enumerated in this client
 102  * @cur_hid_dev:        This keeps track of the device index for which
 103  *                      initialization and registration with HID core
 104  *                      in progress.
 105  * @hid_devices:        Store vid/pid/devid for each enumerated HID device
 106  * @report_descr:       Stores the raw report descriptors for each HID device
 107  * @report_descr_size:  Report description of size of above repo_descr[]
 108  * @hid_sensor_hubs:    Pointer to hid_device for all HID device, so that
 109  *                      when clients are removed, they can be freed
 110  * @hid_descr:          Pointer to hid descriptor for each enumerated hid
 111  *                      device
 112  * @hid_descr_size:     Size of each above report descriptor
 113  * @init_wait:          Wait queue to wait during initialization, where the
 114  *                      client send message to ISH FW and wait for response
 115  * @ishtp_hid_wait:     The wait for get report during wait callback from hid
 116  *                      core
 117  * @bad_recv_cnt:       Running count of packets received with error
 118  * @multi_packet_cnt:   Count of fragmented packet count
 119  *
 120  * This structure is used to store completion flags and per client data like
 121  * like report description, number of HID devices etc.
 122  */
 123 struct ishtp_cl_data {
 124         /* completion flags */
 125         bool enum_devices_done;
 126         bool hid_descr_done;
 127         bool report_descr_done;
 128         bool init_done;
 129         bool suspended;
 130
 131         unsigned int num_hid_devices;
 132         unsigned int cur_hid_dev;
 133         unsigned int hid_dev_count;
 134
 135         struct device_info *hid_devices;
 136         unsigned char *report_descr[MAX_HID_DEVICES];
 137         int report_descr_size[MAX_HID_DEVICES];
 138         struct hid_device *hid_sensor_hubs[MAX_HID_DEVICES];
 139         unsigned char *hid_descr[MAX_HID_DEVICES];
 140         int hid_descr_size[MAX_HID_DEVICES];
 141
 142         wait_queue_head_t init_wait;
 143         wait_queue_head_t ishtp_resume_wait;
 144         struct ishtp_cl *hid_ishtp_cl;
 145
 146         /* Statistics */
 147         unsigned int bad_recv_cnt;
 148         int multi_packet_cnt;
 149
 150         struct work_struct work;
 151         struct ishtp_cl_device *cl_device;
 152 };
 153
 154 /**
 155  * struct ishtp_hid_data - Per instance HID data
 156  * @index:              Device index in the order of enumeration
 157  * @request_done:       Get Feature/Input report complete flag
 158  *                      used during get/set request from hid core
 159  * @client_data:        Link to the client instance
 160  * @hid_wait:           Completion waitq
 161  *
 162  * Used to tie hid hid->driver data to driver client instance
 163  */
 164 struct ishtp_hid_data {
 165         int index;
 166         bool request_done;
 167         struct ishtp_cl_data *client_data;
 168         wait_queue_head_t hid_wait;
 169 };
 170
 171 /* Interface functions between HID LL driver and ISH TP client */
 172 void hid_ishtp_set_feature(struct hid_device *hid, char *buf, unsigned int len,
 173                            int report_id);
 174 void hid_ishtp_get_report(struct hid_device *hid, int report_id,
 175                           int report_type);
 176 int ishtp_hid_probe(unsigned int cur_hid_dev,
 177                     struct ishtp_cl_data *client_data);
 178 void ishtp_hid_remove(struct ishtp_cl_data *client_data);
 179 int ishtp_hid_link_ready_wait(struct ishtp_cl_data *client_data);
 180 void ishtp_hid_wakeup(struct hid_device *hid);
 181
 182 #endif  /* ISHTP_HID__H */