diff options
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-logitech-hidpp.c | 140 |
1 files changed, 139 insertions, 1 deletions
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 98b8f09..fc553e3f 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -1295,6 +1295,133 @@ static int k400_connect(struct hid_device *hdev, bool connected) return k400_disable_tap_to_click(hidpp); } +/* ------------------------------------------------------------------------- */ +/* Logitech G920 Driving Force Racing Wheel for Xbox One */ +/* ------------------------------------------------------------------------- */ + +#define HIDPP_PAGE_G920_FORCE_FEEDBACK 0x8123 + +/* Using session ID = 1 */ +#define CMD_G920_FORCE_GET_APERTURE 0x51 +#define CMD_G920_FORCE_SET_APERTURE 0x61 + +struct g920_private_data { + u8 force_feature; + u16 range; +}; + +#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev) + +static ssize_t g920_range_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct hid_device *hid = to_hid_device(dev); + struct hidpp_device *hidpp = hid_get_drvdata(hid); + struct g920_private_data *pdata; + + pdata = hidpp->private_data; + if (!pdata) { + hid_err(hid, "Private driver data not found!\n"); + return -EINVAL; + } + + return scnprintf(buf, PAGE_SIZE, "%u\n", pdata->range); +} + +static ssize_t g920_range_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hid_device *hid = to_hid_device(dev); + struct hidpp_device *hidpp = hid_get_drvdata(hid); + struct g920_private_data *pdata; + struct hidpp_report response; + u8 params[2]; + int ret; + u16 range = simple_strtoul(buf, NULL, 10); + + pdata = hidpp->private_data; + if (!pdata) { + hid_err(hid, "Private driver data not found!\n"); + return -EINVAL; + } + + if (range < 180) + range = 180; + else if (range > 900) + range = 900; + + params[0] = range >> 8; + params[1] = range & 0x00FF; + + ret = hidpp_send_fap_command_sync(hidpp, pdata->force_feature, + CMD_G920_FORCE_SET_APERTURE, params, 2, &response); + if (ret) + return ret; + + pdata->range = range; + return count; +} + +static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, g920_range_show, g920_range_store); + +static int g920_allocate(struct hid_device *hdev) +{ + struct hidpp_device *hidpp = hid_get_drvdata(hdev); + struct g920_private_data *pdata; + + pdata = devm_kzalloc(&hdev->dev, sizeof(struct g920_private_data), + GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + hidpp->private_data = pdata; + + return 0; +} + +static int g920_get_config(struct hidpp_device *hidpp) +{ + struct g920_private_data *pdata = hidpp->private_data; + struct hidpp_report response; + u8 feature_type; + u8 feature_index; + int ret; + + pdata = hidpp->private_data; + if (!pdata) { + hid_err(hidpp->hid_dev, "Private driver data not found!\n"); + return -EINVAL; + } + + /* Find feature and store for later use */ + ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_G920_FORCE_FEEDBACK, + &feature_index, &feature_type); + if (ret) + return ret; + + pdata->force_feature = feature_index; + + /* Read current Range */ + ret = hidpp_send_fap_command_sync(hidpp, feature_index, + CMD_G920_FORCE_GET_APERTURE, NULL, 0, &response); + if (ret > 0) { + hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n", + __func__, ret); + return -EPROTO; + } + if (ret) + return ret; + + pdata->range = get_unaligned_be16(&response.fap.params[0]); + + /* Create sysfs interface */ + ret = device_create_file(&(hidpp->hid_dev->dev), &dev_attr_range); + if (ret) + hid_warn(hidpp->hid_dev, "Unable to create sysfs interface for \"range\", errno %d\n", ret); + + return 0; +} + /* -------------------------------------------------------------------------- */ /* Generic HID++ devices */ /* -------------------------------------------------------------------------- */ @@ -1595,6 +1722,10 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) ret = k400_allocate(hdev); if (ret) goto allocate_fail; + } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) { + ret = g920_allocate(hdev); + if (ret) + goto allocate_fail; } INIT_WORK(&hidpp->work, delayed_work_cb); @@ -1648,6 +1779,10 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) ret = wtp_get_config(hidpp); if (ret) goto hid_hw_open_failed; + } else if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) { + ret = g920_get_config(hidpp); + if (ret) + goto hid_hw_open_failed; } /* Block incoming packets */ @@ -1673,6 +1808,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) hid_hw_open_failed: hid_device_io_stop(hdev); if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) { + device_remove_file(&hdev->dev, &dev_attr_range); hid_hw_close(hdev); hid_hw_stop(hdev); } @@ -1689,8 +1825,10 @@ static void hidpp_remove(struct hid_device *hdev) { struct hidpp_device *hidpp = hid_get_drvdata(hdev); - if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) + if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) { + device_remove_file(&hdev->dev, &dev_attr_range); hid_hw_close(hdev); + } hid_hw_stop(hdev); cancel_work_sync(&hidpp->work); mutex_destroy(&hidpp->send_mutex); |
