drivers/hid/hid-steelseries.c

   1 /*
   2  *  HID driver for Steelseries SRW-S1
   3  *
   4  *  Copyright (c) 2013 Simon Wood
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  */
  13
  14 #include <linux/device.h>
  15 #include <linux/hid.h>
  16 #include <linux/module.h>
  17
  18 #include "hid-ids.h"
  19
  20 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
  21     (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
  22 #define SRWS1_NUMBER_LEDS 15
  23 struct steelseries_srws1_data {
  24         __u16 led_state;
  25         /* the last element is used for setting all leds simultaneously */
  26         struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
  27 };
  28 #endif
  29
  30 /* Fixed report descriptor for Steelseries SRW-S1 wheel controller
  31  *
  32  * The original descriptor hides the sensitivity and assists dials
  33  * a custom vendor usage page. This inserts a patch to make them
  34  * appear in the 'Generic Desktop' usage.
  35  */
  36
  37 static __u8 steelseries_srws1_rdesc_fixed[] = {
  38 0x05, 0x01,         /*  Usage Page (Desktop)                */
  39 0x09, 0x08,         /*  Usage (MultiAxis), Changed          */
  40 0xA1, 0x01,         /*  Collection (Application),           */
  41 0xA1, 0x02,         /*      Collection (Logical),           */
  42 0x95, 0x01,         /*          Report Count (1),           */
  43 0x05, 0x01,         /* Changed  Usage Page (Desktop),       */
  44 0x09, 0x30,         /* Changed  Usage (X),                  */
  45 0x16, 0xF8, 0xF8,   /*          Logical Minimum (-1800),    */
  46 0x26, 0x08, 0x07,   /*          Logical Maximum (1800),     */
  47 0x65, 0x14,         /*          Unit (Degrees),             */
  48 0x55, 0x0F,         /*          Unit Exponent (15),         */
  49 0x75, 0x10,         /*          Report Size (16),           */
  50 0x81, 0x02,         /*          Input (Variable),           */
  51 0x09, 0x31,         /* Changed  Usage (Y),                  */
  52 0x15, 0x00,         /*          Logical Minimum (0),        */
  53 0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
  54 0x75, 0x0C,         /*          Report Size (12),           */
  55 0x81, 0x02,         /*          Input (Variable),           */
  56 0x09, 0x32,         /* Changed  Usage (Z),                  */
  57 0x15, 0x00,         /*          Logical Minimum (0),        */
  58 0x26, 0xFF, 0x03,   /*          Logical Maximum (1023),     */
  59 0x75, 0x0C,         /*          Report Size (12),           */
  60 0x81, 0x02,         /*          Input (Variable),           */
  61 0x05, 0x01,         /*          Usage Page (Desktop),       */
  62 0x09, 0x39,         /*          Usage (Hat Switch),         */
  63 0x25, 0x07,         /*          Logical Maximum (7),        */
  64 0x35, 0x00,         /*          Physical Minimum (0),       */
  65 0x46, 0x3B, 0x01,   /*          Physical Maximum (315),     */
  66 0x65, 0x14,         /*          Unit (Degrees),             */
  67 0x75, 0x04,         /*          Report Size (4),            */
  68 0x95, 0x01,         /*          Report Count (1),           */
  69 0x81, 0x02,         /*          Input (Variable),           */
  70 0x25, 0x01,         /*          Logical Maximum (1),        */
  71 0x45, 0x01,         /*          Physical Maximum (1),       */
  72 0x65, 0x00,         /*          Unit,                       */
  73 0x75, 0x01,         /*          Report Size (1),            */
  74 0x95, 0x03,         /*          Report Count (3),           */
  75 0x81, 0x01,         /*          Input (Constant),           */
  76 0x05, 0x09,         /*          Usage Page (Button),        */
  77 0x19, 0x01,         /*          Usage Minimum (01h),        */
  78 0x29, 0x11,         /*          Usage Maximum (11h),        */
  79 0x95, 0x11,         /*          Report Count (17),          */
  80 0x81, 0x02,         /*          Input (Variable),           */
  81                     /*   ---- Dial patch starts here ----   */
  82 0x05, 0x01,         /*          Usage Page (Desktop),       */
  83 0x09, 0x33,         /*          Usage (RX),                 */
  84 0x75, 0x04,         /*          Report Size (4),            */
  85 0x95, 0x02,         /*          Report Count (2),           */
  86 0x15, 0x00,         /*          Logical Minimum (0),        */
  87 0x25, 0x0b,         /*          Logical Maximum (b),        */
  88 0x81, 0x02,         /*          Input (Variable),           */
  89 0x09, 0x35,         /*          Usage (RZ),                 */
  90 0x75, 0x04,         /*          Report Size (4),            */
  91 0x95, 0x01,         /*          Report Count (1),           */
  92 0x25, 0x03,         /*          Logical Maximum (3),        */
  93 0x81, 0x02,         /*          Input (Variable),           */
  94                     /*    ---- Dial patch ends here ----    */
  95 0x06, 0x00, 0xFF,   /*          Usage Page (FF00h),         */
  96 0x09, 0x01,         /*          Usage (01h),                */
  97 0x75, 0x04,         /* Changed  Report Size (4),            */
  98 0x95, 0x0D,         /* Changed  Report Count (13),          */
  99 0x81, 0x02,         /*          Input (Variable),           */
 100 0xC0,               /*      End Collection,                 */
 101 0xA1, 0x02,         /*      Collection (Logical),           */
 102 0x09, 0x02,         /*          Usage (02h),                */
 103 0x75, 0x08,         /*          Report Size (8),            */
 104 0x95, 0x10,         /*          Report Count (16),          */
 105 0x91, 0x02,         /*          Output (Variable),          */
 106 0xC0,               /*      End Collection,                 */
 107 0xC0                /*  End Collection                      */
 108 };
 109
 110 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
 111     (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
 112 static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
 113 {
 114         struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
 115         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
 116         __s32 *value = report->field[0]->value;
 117
 118         value[0] = 0x40;
 119         value[1] = leds & 0xFF;
 120         value[2] = leds >> 8;
 121         value[3] = 0x00;
 122         value[4] = 0x00;
 123         value[5] = 0x00;
 124         value[6] = 0x00;
 125         value[7] = 0x00;
 126         value[8] = 0x00;
 127         value[9] = 0x00;
 128         value[10] = 0x00;
 129         value[11] = 0x00;
 130         value[12] = 0x00;
 131         value[13] = 0x00;
 132         value[14] = 0x00;
 133         value[15] = 0x00;
 134
 135         hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
 136
 137         /* Note: LED change does not show on device until the device is read/polled */
 138 }
 139
 140 static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
 141                         enum led_brightness value)
 142 {
 143         struct device *dev = led_cdev->dev->parent;
 144         struct hid_device *hid = to_hid_device(dev);
 145         struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
 146
 147         if (!drv_data) {
 148                 hid_err(hid, "Device data not found.");
 149                 return;
 150         }
 151
 152         if (value == LED_OFF)
 153                 drv_data->led_state = 0;
 154         else
 155                 drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
 156
 157         steelseries_srws1_set_leds(hid, drv_data->led_state);
 158 }
 159
 160 static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
 161 {
 162         struct device *dev = led_cdev->dev->parent;
 163         struct hid_device *hid = to_hid_device(dev);
 164         struct steelseries_srws1_data *drv_data;
 165
 166         drv_data = hid_get_drvdata(hid);
 167
 168         if (!drv_data) {
 169                 hid_err(hid, "Device data not found.");
 170                 return LED_OFF;
 171         }
 172
 173         return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
 174 }
 175
 176 static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
 177                         enum led_brightness value)
 178 {
 179         struct device *dev = led_cdev->dev->parent;
 180         struct hid_device *hid = to_hid_device(dev);
 181         struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
 182         int i, state = 0;
 183
 184         if (!drv_data) {
 185                 hid_err(hid, "Device data not found.");
 186                 return;
 187         }
 188
 189         for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
 190                 if (led_cdev != drv_data->led[i])
 191                         continue;
 192
 193                 state = (drv_data->led_state >> i) & 1;
 194                 if (value == LED_OFF && state) {
 195                         drv_data->led_state &= ~(1 << i);
 196                         steelseries_srws1_set_leds(hid, drv_data->led_state);
 197                 } else if (value != LED_OFF && !state) {
 198                         drv_data->led_state |= 1 << i;
 199                         steelseries_srws1_set_leds(hid, drv_data->led_state);
 200                 }
 201                 break;
 202         }
 203 }
 204
 205 static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
 206 {
 207         struct device *dev = led_cdev->dev->parent;
 208         struct hid_device *hid = to_hid_device(dev);
 209         struct steelseries_srws1_data *drv_data;
 210         int i, value = 0;
 211
 212         drv_data = hid_get_drvdata(hid);
 213
 214         if (!drv_data) {
 215                 hid_err(hid, "Device data not found.");
 216                 return LED_OFF;
 217         }
 218
 219         for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
 220                 if (led_cdev == drv_data->led[i]) {
 221                         value = (drv_data->led_state >> i) & 1;
 222                         break;
 223                 }
 224
 225         return value ? LED_FULL : LED_OFF;
 226 }
 227
 228 static int steelseries_srws1_probe(struct hid_device *hdev,
 229                 const struct hid_device_id *id)
 230 {
 231         int ret, i;
 232         struct led_classdev *led;
 233         size_t name_sz;
 234         char *name;
 235
 236         struct steelseries_srws1_data *drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
 237
 238         if (drv_data == NULL) {
 239                 hid_err(hdev, "can't alloc SRW-S1 memory\n");
 240                 return -ENOMEM;
 241         }
 242
 243         hid_set_drvdata(hdev, drv_data);
 244
 245         ret = hid_parse(hdev);
 246         if (ret) {
 247                 hid_err(hdev, "parse failed\n");
 248                 goto err_free;
 249         }
 250
 251         if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
 252                 ret = -ENODEV;
 253                 goto err_free;
 254         }
 255
 256         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 257         if (ret) {
 258                 hid_err(hdev, "hw start failed\n");
 259                 goto err_free;
 260         }
 261
 262         /* register led subsystem */
 263         drv_data->led_state = 0;
 264         for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
 265                 drv_data->led[i] = NULL;
 266
 267         steelseries_srws1_set_leds(hdev, 0);
 268
 269         name_sz = strlen(hdev->uniq) + 16;
 270
 271         /* 'ALL', for setting all LEDs simultaneously */
 272         led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
 273         if (!led) {
 274                 hid_err(hdev, "can't allocate memory for LED ALL\n");
 275                 goto err_led;
 276         }
 277
 278         name = (void *)(&led[1]);
 279         snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
 280         led->name = name;
 281         led->brightness = 0;
 282         led->max_brightness = 1;
 283         led->brightness_get = steelseries_srws1_led_all_get_brightness;
 284         led->brightness_set = steelseries_srws1_led_all_set_brightness;
 285
 286         drv_data->led[SRWS1_NUMBER_LEDS] = led;
 287         ret = led_classdev_register(&hdev->dev, led);
 288         if (ret)
 289                 goto err_led;
 290
 291         /* Each individual LED */
 292         for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
 293                 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
 294                 if (!led) {
 295                         hid_err(hdev, "can't allocate memory for LED %d\n", i);
 296                         goto err_led;
 297                 }
 298
 299                 name = (void *)(&led[1]);
 300                 snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
 301                 led->name = name;
 302                 led->brightness = 0;
 303                 led->max_brightness = 1;
 304                 led->brightness_get = steelseries_srws1_led_get_brightness;
 305                 led->brightness_set = steelseries_srws1_led_set_brightness;
 306
 307                 drv_data->led[i] = led;
 308                 ret = led_classdev_register(&hdev->dev, led);
 309
 310                 if (ret) {
 311                         hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
 312 err_led:
 313                         /* Deregister all LEDs (if any) */
 314                         for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
 315                                 led = drv_data->led[i];
 316                                 drv_data->led[i] = NULL;
 317                                 if (!led)
 318                                         continue;
 319                                 led_classdev_unregister(led);
 320                                 kfree(led);
 321                         }
 322                         goto out;       /* but let the driver continue without LEDs */
 323                 }
 324         }
 325 out:
 326         return 0;
 327 err_free:
 328         kfree(drv_data);
 329         return ret;
 330 }
 331
 332 static void steelseries_srws1_remove(struct hid_device *hdev)
 333 {
 334         int i;
 335         struct led_classdev *led;
 336
 337         struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
 338
 339         if (drv_data) {
 340                 /* Deregister LEDs (if any) */
 341                 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
 342                         led = drv_data->led[i];
 343                         drv_data->led[i] = NULL;
 344                         if (!led)
 345                                 continue;
 346                         led_classdev_unregister(led);
 347                         kfree(led);
 348                 }
 349
 350         }
 351
 352         hid_hw_stop(hdev);
 353         kfree(drv_data);
 354         return;
 355 }
 356 #endif
 357
 358 static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 359                 unsigned int *rsize)
 360 {
 361         if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
 362                         && rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
 363                 hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
 364                 rdesc = steelseries_srws1_rdesc_fixed;
 365                 *rsize = sizeof(steelseries_srws1_rdesc_fixed);
 366         }
 367         return rdesc;
 368 }
 369
 370 static const struct hid_device_id steelseries_srws1_devices[] = {
 371         { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
 372         { }
 373 };
 374 MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
 375
 376 static struct hid_driver steelseries_srws1_driver = {
 377         .name = "steelseries_srws1",
 378         .id_table = steelseries_srws1_devices,
 379 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
 380     (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
 381         .probe = steelseries_srws1_probe,
 382         .remove = steelseries_srws1_remove,
 383 #endif
 384         .report_fixup = steelseries_srws1_report_fixup
 385 };
 386
 387 module_hid_driver(steelseries_srws1_driver);
 388 MODULE_LICENSE("GPL");