Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | // SPDX-License-Identifier: GPL-2.0-or-later /* * HID driver for some cypress "special" devices * * Copyright (c) 1999 Andreas Gal * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc * Copyright (c) 2006-2007 Jiri Kosina * Copyright (c) 2008 Jiri Slaby */ /* */ #include <linux/device.h> #include <linux/hid.h> #include <linux/input.h> #include <linux/module.h> #include "hid-ids.h" #define CP_RDESC_SWAPPED_MIN_MAX 0x01 #define CP_2WHEEL_MOUSE_HACK 0x02 #define CP_2WHEEL_MOUSE_HACK_ON 0x04 #define VA_INVAL_LOGICAL_BOUNDARY 0x08 /* * Some USB barcode readers from cypress have usage min and usage max in * the wrong order */ static __u8 *cp_rdesc_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { unsigned int i; if (*rsize < 4) return rdesc; for (i = 0; i < *rsize - 4; i++) if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { rdesc[i] = 0x19; rdesc[i + 2] = 0x29; swap(rdesc[i + 3], rdesc[i + 1]); } return rdesc; } static __u8 *va_logical_boundary_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { /* * Varmilo VA104M (with VID Cypress and device ID 07B1) incorrectly * reports Logical Minimum of its Consumer Control device as 572 * (0x02 0x3c). Fix this by setting its Logical Minimum to zero. */ if (*rsize == 25 && rdesc[0] == 0x05 && rdesc[1] == 0x0c && rdesc[2] == 0x09 && rdesc[3] == 0x01 && rdesc[6] == 0x19 && rdesc[7] == 0x00 && rdesc[11] == 0x16 && rdesc[12] == 0x3c && rdesc[13] == 0x02) { hid_info(hdev, "fixing up varmilo VA104M consumer control report descriptor\n"); rdesc[12] = 0x00; rdesc[13] = 0x00; } return rdesc; } static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); if (quirks & CP_RDESC_SWAPPED_MIN_MAX) rdesc = cp_rdesc_fixup(hdev, rdesc, rsize); if (quirks & VA_INVAL_LOGICAL_BOUNDARY) rdesc = va_logical_boundary_fixup(hdev, rdesc, rsize); return rdesc; } static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); if (!(quirks & CP_2WHEEL_MOUSE_HACK)) return 0; if (usage->type == EV_REL && usage->code == REL_WHEEL) set_bit(REL_HWHEEL, *bit); if (usage->hid == 0x00090005) return -1; return 0; } static int cp_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value) { unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || !usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK)) return 0; if (usage->hid == 0x00090005) { if (value) quirks |= CP_2WHEEL_MOUSE_HACK_ON; else quirks &= ~CP_2WHEEL_MOUSE_HACK_ON; hid_set_drvdata(hdev, (void *)quirks); return 1; } if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) { struct input_dev *input = field->hidinput->input; input_event(input, usage->type, REL_HWHEEL, value); return 1; } return 0; } static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id) { unsigned long quirks = id->driver_data; int ret; hid_set_drvdata(hdev, (void *)quirks); ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); goto err_free; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { hid_err(hdev, "hw start failed\n"); goto err_free; } return 0; err_free: return ret; } static const struct hid_device_id cp_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1), .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2), .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3), .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4), .driver_data = CP_RDESC_SWAPPED_MIN_MAX }, { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE), .driver_data = CP_2WHEEL_MOUSE_HACK }, { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_VARMILO_VA104M_07B1), .driver_data = VA_INVAL_LOGICAL_BOUNDARY }, { } }; MODULE_DEVICE_TABLE(hid, cp_devices); static struct hid_driver cp_driver = { .name = "cypress", .id_table = cp_devices, .report_fixup = cp_report_fixup, .input_mapped = cp_input_mapped, .event = cp_event, .probe = cp_probe, }; module_hid_driver(cp_driver); MODULE_LICENSE("GPL"); |