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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * ISHTP-HID glue driver's definitions.
   4  *
   5  * Copyright (c) 2014-2016, Intel Corporation.
   6  */
   7 #ifndef ISHTP_HID__H
   8 #define ISHTP_HID__H
   9
  10 /* The fixed ISH product and vendor id */
  11 #define ISH_HID_VENDOR  0x8086
  12 #define ISH_HID_PRODUCT 0x22D8
  13 #define ISH_HID_VERSION 0x0200
  14
  15 #define CMD_MASK        0x7F
  16 #define IS_RESPONSE     0x80
  17
  18 /* Used to dump to Linux trace buffer, if enabled */
  19 extern void (*hid_print_trace)(void *unused, const char *format, ...);
  20 #define hid_ishtp_trace(client, ...) \
  21                 (hid_print_trace)(NULL, __VA_ARGS__)
  22
  23 /* ISH Transport protocol (ISHTP in short) GUID */
  24 static const guid_t hid_ishtp_guid =
  25         GUID_INIT(0x33AECD58, 0xB679, 0x4E54,
  26                   0x9B, 0xD9, 0xA0, 0x4D, 0x34, 0xF0, 0xC2, 0x26);
  27
  28 /* ISH HID message structure */
  29 struct hostif_msg_hdr {
  30         uint8_t command; /* Bit 7: is_response */
  31         uint8_t device_id;
  32         uint8_t status;
  33         uint8_t flags;
  34         uint16_t size;
  35 } __packed;
  36
  37 struct hostif_msg {
  38         struct hostif_msg_hdr   hdr;
  39 } __packed;
  40
  41 struct hostif_msg_to_sensor {
  42         struct hostif_msg_hdr   hdr;
  43         uint8_t report_id;
  44 } __packed;
  45
  46 struct device_info {
  47         uint32_t dev_id;
  48         uint8_t dev_class;
  49         uint16_t pid;
  50         uint16_t vid;
  51 } __packed;
  52
  53 struct ishtp_version {
  54         uint8_t major;
  55         uint8_t minor;
  56         uint8_t hotfix;
  57         uint16_t build;
  58 } __packed;
  59
  60 /* struct for ISHTP aggregated input data */
  61 struct report_list {
  62         uint16_t total_size;
  63         uint8_t num_of_reports;
  64         uint8_t flags;
  65         struct {
  66                 uint16_t        size_of_report;
  67                 uint8_t report[1];
  68         } __packed reports[1];
  69 } __packed;
  70
  71 /* HOSTIF commands */
  72 #define HOSTIF_HID_COMMAND_BASE                 0
  73 #define HOSTIF_GET_HID_DESCRIPTOR               0
  74 #define HOSTIF_GET_REPORT_DESCRIPTOR            1
  75 #define HOSTIF_GET_FEATURE_REPORT               2
  76 #define HOSTIF_SET_FEATURE_REPORT               3
  77 #define HOSTIF_GET_INPUT_REPORT                 4
  78 #define HOSTIF_PUBLISH_INPUT_REPORT             5
  79 #define HOSTIF_PUBLISH_INPUT_REPORT_LIST        6
  80 #define HOSTIF_DM_COMMAND_BASE                  32
  81 #define HOSTIF_DM_ENUM_DEVICES                  33
  82 #define HOSTIF_DM_ADD_DEVICE                    34
  83
  84 #define MAX_HID_DEVICES                         32
  85
  86 /**
  87  * struct ishtp_cl_data - Encapsulate per ISH TP HID Client
  88  * @enum_device_done:   Enum devices response complete flag
  89  * @hid_descr_done:     HID descriptor complete flag
  90  * @report_descr_done:  Get report descriptor complete flag
  91  * @init_done:          Init process completed successfully
  92  * @suspended:          System is under suspend state or in progress
  93  * @num_hid_devices:    Number of HID devices enumerated in this client
  94  * @cur_hid_dev:        This keeps track of the device index for which
  95  *                      initialization and registration with HID core
  96  *                      in progress.
  97  * @hid_devices:        Store vid/pid/devid for each enumerated HID device
  98  * @report_descr:       Stores the raw report descriptors for each HID device
  99  * @report_descr_size:  Report description of size of above repo_descr[]
 100  * @hid_sensor_hubs:    Pointer to hid_device for all HID device, so that
 101  *                      when clients are removed, they can be freed
 102  * @hid_descr:          Pointer to hid descriptor for each enumerated hid
 103  *                      device
 104  * @hid_descr_size:     Size of each above report descriptor
 105  * @init_wait:          Wait queue to wait during initialization, where the
 106  *                      client send message to ISH FW and wait for response
 107  * @ishtp_hid_wait:     The wait for get report during wait callback from hid
 108  *                      core
 109  * @bad_recv_cnt:       Running count of packets received with error
 110  * @multi_packet_cnt:   Count of fragmented packet count
 111  *
 112  * This structure is used to store completion flags and per client data like
 113  * like report description, number of HID devices etc.
 114  */
 115 struct ishtp_cl_data {
 116         /* completion flags */
 117         bool enum_devices_done;
 118         bool hid_descr_done;
 119         bool report_descr_done;
 120         bool init_done;
 121         bool suspended;
 122
 123         unsigned int num_hid_devices;
 124         unsigned int cur_hid_dev;
 125         unsigned int hid_dev_count;
 126
 127         struct device_info *hid_devices;
 128         unsigned char *report_descr[MAX_HID_DEVICES];
 129         int report_descr_size[MAX_HID_DEVICES];
 130         struct hid_device *hid_sensor_hubs[MAX_HID_DEVICES];
 131         unsigned char *hid_descr[MAX_HID_DEVICES];
 132         int hid_descr_size[MAX_HID_DEVICES];
 133
 134         wait_queue_head_t init_wait;
 135         wait_queue_head_t ishtp_resume_wait;
 136         struct ishtp_cl *hid_ishtp_cl;
 137
 138         /* Statistics */
 139         unsigned int bad_recv_cnt;
 140         int multi_packet_cnt;
 141
 142         struct work_struct work;
 143         struct ishtp_cl_device *cl_device;
 144 };
 145
 146 /**
 147  * struct ishtp_hid_data - Per instance HID data
 148  * @index:              Device index in the order of enumeration
 149  * @request_done:       Get Feature/Input report complete flag
 150  *                      used during get/set request from hid core
 151  * @client_data:        Link to the client instance
 152  * @hid_wait:           Completion waitq
 153  *
 154  * @raw_get_req:        Flag indicating raw get request ongoing
 155  * @raw_buf:            raw request buffer filled on receiving get report
 156  * @raw_buf_size:       raw request buffer size
 157  * Used to tie hid hid->driver data to driver client instance
 158  */
 159 struct ishtp_hid_data {
 160         int index;
 161         bool request_done;
 162         struct ishtp_cl_data *client_data;
 163         wait_queue_head_t hid_wait;
 164
 165         /* raw request */
 166         bool raw_get_req;
 167         u8 *raw_buf;
 168         size_t raw_buf_size;
 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 */