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179 lines
4.6 KiB
179 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* HID driver for some cypress "special" devices |
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* |
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* Copyright (c) 1999 Andreas Gal |
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* Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]> |
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* Copyright (c) 2005 Michael Haboustak <[email protected]> for Concept2, Inc |
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* Copyright (c) 2006-2007 Jiri Kosina |
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* Copyright (c) 2008 Jiri Slaby |
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*/ |
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/* |
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*/ |
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#include <linux/device.h> |
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#include <linux/hid.h> |
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#include <linux/input.h> |
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#include <linux/module.h> |
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#include "hid-ids.h" |
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#define CP_RDESC_SWAPPED_MIN_MAX 0x01 |
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#define CP_2WHEEL_MOUSE_HACK 0x02 |
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#define CP_2WHEEL_MOUSE_HACK_ON 0x04 |
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#define VA_INVAL_LOGICAL_BOUNDARY 0x08 |
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/* |
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* Some USB barcode readers from cypress have usage min and usage max in |
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* the wrong order |
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*/ |
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static __u8 *cp_rdesc_fixup(struct hid_device *hdev, __u8 *rdesc, |
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unsigned int *rsize) |
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{ |
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unsigned int i; |
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if (*rsize < 4) |
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return rdesc; |
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for (i = 0; i < *rsize - 4; i++) |
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if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { |
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rdesc[i] = 0x19; |
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rdesc[i + 2] = 0x29; |
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swap(rdesc[i + 3], rdesc[i + 1]); |
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} |
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return rdesc; |
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} |
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static __u8 *va_logical_boundary_fixup(struct hid_device *hdev, __u8 *rdesc, |
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unsigned int *rsize) |
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{ |
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/* |
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* Varmilo VA104M (with VID Cypress and device ID 07B1) incorrectly |
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* reports Logical Minimum of its Consumer Control device as 572 |
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* (0x02 0x3c). Fix this by setting its Logical Minimum to zero. |
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*/ |
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if (*rsize == 25 && |
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rdesc[0] == 0x05 && rdesc[1] == 0x0c && |
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rdesc[2] == 0x09 && rdesc[3] == 0x01 && |
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rdesc[6] == 0x19 && rdesc[7] == 0x00 && |
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rdesc[11] == 0x16 && rdesc[12] == 0x3c && rdesc[13] == 0x02) { |
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hid_info(hdev, |
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"fixing up varmilo VA104M consumer control report descriptor\n"); |
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rdesc[12] = 0x00; |
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rdesc[13] = 0x00; |
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} |
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return rdesc; |
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} |
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static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
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unsigned int *rsize) |
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{ |
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
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if (quirks & CP_RDESC_SWAPPED_MIN_MAX) |
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rdesc = cp_rdesc_fixup(hdev, rdesc, rsize); |
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if (quirks & VA_INVAL_LOGICAL_BOUNDARY) |
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rdesc = va_logical_boundary_fixup(hdev, rdesc, rsize); |
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return rdesc; |
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} |
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static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
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struct hid_field *field, struct hid_usage *usage, |
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unsigned long **bit, int *max) |
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{ |
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
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if (!(quirks & CP_2WHEEL_MOUSE_HACK)) |
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return 0; |
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if (usage->type == EV_REL && usage->code == REL_WHEEL) |
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set_bit(REL_HWHEEL, *bit); |
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if (usage->hid == 0x00090005) |
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return -1; |
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return 0; |
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} |
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static int cp_event(struct hid_device *hdev, struct hid_field *field, |
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struct hid_usage *usage, __s32 value) |
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{ |
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unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); |
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
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!usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK)) |
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return 0; |
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if (usage->hid == 0x00090005) { |
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if (value) |
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quirks |= CP_2WHEEL_MOUSE_HACK_ON; |
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else |
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quirks &= ~CP_2WHEEL_MOUSE_HACK_ON; |
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hid_set_drvdata(hdev, (void *)quirks); |
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return 1; |
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} |
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if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) { |
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struct input_dev *input = field->hidinput->input; |
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input_event(input, usage->type, REL_HWHEEL, value); |
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return 1; |
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} |
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return 0; |
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} |
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static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id) |
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{ |
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unsigned long quirks = id->driver_data; |
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int ret; |
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hid_set_drvdata(hdev, (void *)quirks); |
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ret = hid_parse(hdev); |
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if (ret) { |
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hid_err(hdev, "parse failed\n"); |
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goto err_free; |
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} |
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
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if (ret) { |
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hid_err(hdev, "hw start failed\n"); |
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goto err_free; |
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} |
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return 0; |
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err_free: |
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return ret; |
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} |
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static const struct hid_device_id cp_devices[] = { |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1), |
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2), |
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3), |
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4), |
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.driver_data = CP_RDESC_SWAPPED_MIN_MAX }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE), |
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.driver_data = CP_2WHEEL_MOUSE_HACK }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_VARMILO_VA104M_07B1), |
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.driver_data = VA_INVAL_LOGICAL_BOUNDARY }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(hid, cp_devices); |
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static struct hid_driver cp_driver = { |
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.name = "cypress", |
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.id_table = cp_devices, |
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.report_fixup = cp_report_fixup, |
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.input_mapped = cp_input_mapped, |
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.event = cp_event, |
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.probe = cp_probe, |
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}; |
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module_hid_driver(cp_driver); |
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MODULE_LICENSE("GPL");
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