From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/hid/hid-cypress.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 drivers/hid/hid-cypress.c (limited to 'drivers/hid/hid-cypress.c') diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c new file mode 100644 index 000000000..c4ef3bc72 --- /dev/null +++ b/drivers/hid/hid-cypress.c @@ -0,0 +1,149 @@ +/* + * HID driver for some cypress "special" devices + * + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik + * Copyright (c) 2005 Michael Haboustak for Concept2, Inc + * Copyright (c) 2006-2007 Jiri Kosina + * Copyright (c) 2008 Jiri Slaby + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ + +#include +#include +#include +#include + +#include "hid-ids.h" + +#define CP_RDESC_SWAPPED_MIN_MAX 0x01 +#define CP_2WHEEL_MOUSE_HACK 0x02 +#define CP_2WHEEL_MOUSE_HACK_ON 0x04 + +/* + * Some USB barcode readers from cypress have usage min and usage max in + * the wrong order + */ +static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); + unsigned int i; + + if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) + return rdesc; + + for (i = 0; i < *rsize - 4; i++) + if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { + __u8 tmp; + + rdesc[i] = 0x19; + rdesc[i + 2] = 0x29; + tmp = rdesc[i + 3]; + rdesc[i + 3] = rdesc[i + 1]; + rdesc[i + 1] = tmp; + } + 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 }, + { } +}; +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"); -- cgit v1.2.3-54-g00ecf