drivers/hid/hid-plantronics.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Plantronics USB HID Driver
   4  *
   5  *  Copyright (c) 2014 JD Cole <jd.cole@plantronics.com>
   6  *  Copyright (c) 2015-2018 Terry Junge <terry.junge@plantronics.com>
   7  */
   8
   9 /*
  10  */
  11
  12 #include "hid-ids.h"
  13
  14 #include <linux/hid.h>
  15 #include <linux/module.h>
  16 #include <linux/jiffies.h>
  17
  18 #define PLT_HID_1_0_PAGE        0xffa00000
  19 #define PLT_HID_2_0_PAGE        0xffa20000
  20
  21 #define PLT_BASIC_TELEPHONY     0x0003
  22 #define PLT_BASIC_EXCEPTION     0x0005
  23
  24 #define PLT_VOL_UP              0x00b1
  25 #define PLT_VOL_DOWN            0x00b2
  26
  27 #define PLT1_VOL_UP             (PLT_HID_1_0_PAGE | PLT_VOL_UP)
  28 #define PLT1_VOL_DOWN           (PLT_HID_1_0_PAGE | PLT_VOL_DOWN)
  29 #define PLT2_VOL_UP             (PLT_HID_2_0_PAGE | PLT_VOL_UP)
  30 #define PLT2_VOL_DOWN           (PLT_HID_2_0_PAGE | PLT_VOL_DOWN)
  31
  32 #define PLT_DA60                0xda60
  33 #define PLT_BT300_MIN           0x0413
  34 #define PLT_BT300_MAX           0x0418
  35
  36
  37 #define PLT_ALLOW_CONSUMER (field->application == HID_CP_CONSUMERCONTROL && \
  38                             (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER)
  39
  40 #define PLT_QUIRK_DOUBLE_VOLUME_KEYS BIT(0)
  41
  42 #define PLT_DOUBLE_KEY_TIMEOUT 5 /* ms */
  43
  44 struct plt_drv_data {
  45         unsigned long device_type;
  46         unsigned long last_volume_key_ts;
  47         u32 quirks;
  48 };
  49
  50 static int plantronics_input_mapping(struct hid_device *hdev,
  51                                      struct hid_input *hi,
  52                                      struct hid_field *field,
  53                                      struct hid_usage *usage,
  54                                      unsigned long **bit, int *max)
  55 {
  56         unsigned short mapped_key;
  57         struct plt_drv_data *drv_data = hid_get_drvdata(hdev);
  58         unsigned long plt_type = drv_data->device_type;
  59
  60         /* special case for PTT products */
  61         if (field->application == HID_GD_JOYSTICK)
  62                 goto defaulted;
  63
  64         /* handle volume up/down mapping */
  65         /* non-standard types or multi-HID interfaces - plt_type is PID */
  66         if (!(plt_type & HID_USAGE_PAGE)) {
  67                 switch (plt_type) {
  68                 case PLT_DA60:
  69                         if (PLT_ALLOW_CONSUMER)
  70                                 goto defaulted;
  71                         goto ignored;
  72                 default:
  73                         if (PLT_ALLOW_CONSUMER)
  74                                 goto defaulted;
  75                 }
  76         }
  77         /* handle standard types - plt_type is 0xffa0uuuu or 0xffa2uuuu */
  78         /* 'basic telephony compliant' - allow default consumer page map */
  79         else if ((plt_type & HID_USAGE) >= PLT_BASIC_TELEPHONY &&
  80                  (plt_type & HID_USAGE) != PLT_BASIC_EXCEPTION) {
  81                 if (PLT_ALLOW_CONSUMER)
  82                         goto defaulted;
  83         }
  84         /* not 'basic telephony' - apply legacy mapping */
  85         /* only map if the field is in the device's primary vendor page */
  86         else if (!((field->application ^ plt_type) & HID_USAGE_PAGE)) {
  87                 switch (usage->hid) {
  88                 case PLT1_VOL_UP:
  89                 case PLT2_VOL_UP:
  90                         mapped_key = KEY_VOLUMEUP;
  91                         goto mapped;
  92                 case PLT1_VOL_DOWN:
  93                 case PLT2_VOL_DOWN:
  94                         mapped_key = KEY_VOLUMEDOWN;
  95                         goto mapped;
  96                 }
  97         }
  98
  99 /*
 100  * Future mapping of call control or other usages,
 101  * if and when keys are defined would go here
 102  * otherwise, ignore everything else that was not mapped
 103  */
 104
 105 ignored:
 106         return -1;
 107
 108 defaulted:
 109         hid_dbg(hdev, "usage: %08x (appl: %08x) - defaulted\n",
 110                 usage->hid, field->application);
 111         return 0;
 112
 113 mapped:
 114         hid_map_usage_clear(hi, usage, bit, max, EV_KEY, mapped_key);
 115         hid_dbg(hdev, "usage: %08x (appl: %08x) - mapped to key %d\n",
 116                 usage->hid, field->application, mapped_key);
 117         return 1;
 118 }
 119
 120 static int plantronics_event(struct hid_device *hdev, struct hid_field *field,
 121                              struct hid_usage *usage, __s32 value)
 122 {
 123         struct plt_drv_data *drv_data = hid_get_drvdata(hdev);
 124
 125         if (drv_data->quirks & PLT_QUIRK_DOUBLE_VOLUME_KEYS) {
 126                 unsigned long prev_ts, cur_ts;
 127
 128                 /* Usages are filtered in plantronics_usages. */
 129
 130                 if (!value) /* Handle key presses only. */
 131                         return 0;
 132
 133                 prev_ts = drv_data->last_volume_key_ts;
 134                 cur_ts = jiffies;
 135                 if (jiffies_to_msecs(cur_ts - prev_ts) <= PLT_DOUBLE_KEY_TIMEOUT)
 136                         return 1; /* Ignore the repeated key. */
 137
 138                 drv_data->last_volume_key_ts = cur_ts;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static unsigned long plantronics_device_type(struct hid_device *hdev)
 145 {
 146         unsigned i, col_page;
 147         unsigned long plt_type = hdev->product;
 148
 149         /* multi-HID interfaces? - plt_type is PID */
 150         if (plt_type >= PLT_BT300_MIN && plt_type <= PLT_BT300_MAX)
 151                 goto exit;
 152
 153         /* determine primary vendor page */
 154         for (i = 0; i < hdev->maxcollection; i++) {
 155                 col_page = hdev->collection[i].usage & HID_USAGE_PAGE;
 156                 if (col_page == PLT_HID_2_0_PAGE) {
 157                         plt_type = hdev->collection[i].usage;
 158                         break;
 159                 }
 160                 if (col_page == PLT_HID_1_0_PAGE)
 161                         plt_type = hdev->collection[i].usage;
 162         }
 163
 164 exit:
 165         hid_dbg(hdev, "plt_type decoded as: %08lx\n", plt_type);
 166         return plt_type;
 167 }
 168
 169 static int plantronics_probe(struct hid_device *hdev,
 170                              const struct hid_device_id *id)
 171 {
 172         struct plt_drv_data *drv_data;
 173         int ret;
 174
 175         drv_data = devm_kzalloc(&hdev->dev, sizeof(*drv_data), GFP_KERNEL);
 176         if (!drv_data)
 177                 return -ENOMEM;
 178
 179         ret = hid_parse(hdev);
 180         if (ret) {
 181                 hid_err(hdev, "parse failed\n");
 182                 goto err;
 183         }
 184
 185         drv_data->device_type = plantronics_device_type(hdev);
 186         drv_data->quirks = id->driver_data;
 187         drv_data->last_volume_key_ts = jiffies - msecs_to_jiffies(PLT_DOUBLE_KEY_TIMEOUT);
 188
 189         hid_set_drvdata(hdev, drv_data);
 190
 191         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
 192                 HID_CONNECT_HIDINPUT_FORCE | HID_CONNECT_HIDDEV_FORCE);
 193         if (ret)
 194                 hid_err(hdev, "hw start failed\n");
 195
 196 err:
 197         return ret;
 198 }
 199
 200 static const struct hid_device_id plantronics_devices[] = {
 201         { HID_USB_DEVICE(USB_VENDOR_ID_PLANTRONICS,
 202                                          USB_DEVICE_ID_PLANTRONICS_BLACKWIRE_3220_SERIES),
 203                 .driver_data = PLT_QUIRK_DOUBLE_VOLUME_KEYS },
 204         { HID_USB_DEVICE(USB_VENDOR_ID_PLANTRONICS, HID_ANY_ID) },
 205         { }
 206 };
 207 MODULE_DEVICE_TABLE(hid, plantronics_devices);
 208
 209 static const struct hid_usage_id plantronics_usages[] = {
 210         { HID_CP_VOLUMEUP, EV_KEY, HID_ANY_ID },
 211         { HID_CP_VOLUMEDOWN, EV_KEY, HID_ANY_ID },
 212         { HID_TERMINATOR, HID_TERMINATOR, HID_TERMINATOR }
 213 };
 214
 215 static struct hid_driver plantronics_driver = {
 216         .name = "plantronics",
 217         .id_table = plantronics_devices,
 218         .usage_table = plantronics_usages,
 219         .input_mapping = plantronics_input_mapping,
 220         .event = plantronics_event,
 221         .probe = plantronics_probe,
 222 };
 223 module_hid_driver(plantronics_driver);
 224
 225 MODULE_AUTHOR("JD Cole <jd.cole@plantronics.com>");
 226 MODULE_AUTHOR("Terry Junge <terry.junge@plantronics.com>");
 227 MODULE_DESCRIPTION("Plantronics USB HID Driver");
 228 MODULE_LICENSE("GPL");