| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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| 2 | /* |
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| 3 | * HID driver for EVision devices |
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| 4 | * For now, only ignore bogus consumer reports |
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| 5 | * sent after the keyboard has been configured |
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| 6 | * |
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| 7 | * Copyright (c) 2022 Philippe Valembois |
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| 8 | */ |
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| 9 | |
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| 10 | #include <linux/device.h> |
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| 11 | #include <linux/input.h> |
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| 12 | #include <linux/hid.h> |
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| 13 | #include <linux/module.h> |
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| 14 | |
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| 15 | #include "hid-ids.h" |
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| 16 | |
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| 17 | static int evision_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
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| 18 | struct hid_field *field, struct hid_usage *usage, |
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| 19 | unsigned long **bit, int *max) |
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| 20 | { |
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| 21 | if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) |
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| 22 | return 0; |
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| 23 | |
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| 24 | /* Ignore key down event */ |
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| 25 | if ((usage->hid & HID_USAGE) >> 8 == 0x05) |
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| 26 | return -1; |
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| 27 | /* Ignore key up event */ |
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| 28 | if ((usage->hid & HID_USAGE) >> 8 == 0x06) |
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| 29 | return -1; |
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| 30 | |
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| 31 | switch (usage->hid & HID_USAGE) { |
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| 32 | /* Ignore configuration saved event */ |
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| 33 | case 0x0401: return -1; |
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| 34 | /* Ignore reset event */ |
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| 35 | case 0x0402: return -1; |
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| 36 | } |
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| 37 | return 0; |
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| 38 | } |
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| 39 | |
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| 40 | static const struct hid_device_id evision_devices[] = { |
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| 41 | { HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) }, |
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| 42 | { } |
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| 43 | }; |
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| 44 | MODULE_DEVICE_TABLE(hid, evision_devices); |
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| 45 | |
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| 46 | static struct hid_driver evision_driver = { |
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| 47 | .name = "evision" , |
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| 48 | .id_table = evision_devices, |
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| 49 | .input_mapping = evision_input_mapping, |
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| 50 | }; |
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| 51 | module_hid_driver(evision_driver); |
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| 52 | |
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| 53 | MODULE_LICENSE("GPL" ); |
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| 54 | |
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