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-rw-r--r--drivers/hid/hid-cypress.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c
new file mode 100644
index 000000000..b88f889b3
--- /dev/null
+++ b/drivers/hid/hid-cypress.c
@@ -0,0 +1,179 @@
+// 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");