| 1 | |
| 2 | |
| 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 |
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| 22 | if (hdev->product != USB_DEVICE_ID_EVISION_ICL01)
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| 23 | return 0;
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| 24 |
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| 25 | if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
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| 26 | return 0;
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| 27 |
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| 28 |
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| 29 | if ((usage->hid & HID_USAGE) >> 8 == 0x05)
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| 30 | return -1;
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| 31 |
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| 32 | if ((usage->hid & HID_USAGE) >> 8 == 0x06)
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| 33 | return -1;
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| 34 |
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| 35 | switch (usage->hid & HID_USAGE) {
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| 36 |
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| 37 | case 0x0401: return -1;
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| 38 |
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| 39 | case 0x0402: return -1;
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| 40 | }
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| 41 | return 0;
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| 42 | }
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| 43 |
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| 44 | #define REP_DSC_SIZE 236
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| 45 | #define USAGE_MAX_INDEX 59
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| 46 |
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| 47 | static const __u8 *evision_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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| 48 | unsigned int *rsize)
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| 49 | {
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| 50 | if (hdev->product == USB_DEVICE_ID_EV_TELINK_RECEIVER &&
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| 51 | *rsize == REP_DSC_SIZE && rdesc[USAGE_MAX_INDEX] == 0x29 &&
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| 52 | rdesc[USAGE_MAX_INDEX + 1] == 3) {
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| 53 | hid_info(hdev, "fixing EVision:TeLink Receiver report descriptor\n");
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| 54 | rdesc[USAGE_MAX_INDEX + 1] = 5; |
| 55 | }
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| 56 | return rdesc;
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| 57 | }
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| 58 |
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| 59 | static const struct hid_device_id evision_devices[] = {
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| 60 | { HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) },
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| 61 | { HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EV_TELINK_RECEIVER) },
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| 62 | { }
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| 63 | };
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| 64 | MODULE_DEVICE_TABLE(hid, evision_devices);
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| 65 |
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| 66 | static struct hid_driver evision_driver = {
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| 67 | .name = "evision",
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| 68 | .id_table = evision_devices,
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| 69 | .input_mapping = evision_input_mapping,
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| 70 | .report_fixup = evision_report_fixup,
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| 71 | };
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| 72 | module_hid_driver(evision_driver);
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| 73 |
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| 74 | MODULE_DESCRIPTION("HID driver for EVision devices");
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| 75 | MODULE_LICENSE("GPL");
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