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-rw-r--r--drivers/hid/hid-cherry.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/hid/hid-cherry.c b/drivers/hid/hid-cherry.c
new file mode 100644
index 000000000..6a71187b5
--- /dev/null
+++ b/drivers/hid/hid-cherry.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * HID driver for some cherry "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/module.h>
+
+#include "hid-ids.h"
+
+/*
+ * Cherry Cymotion keyboard have an invalid HID report descriptor,
+ * that needs fixing before we can parse it.
+ */
+static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
+ hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
+ rdesc[11] = rdesc[16] = 0xff;
+ rdesc[12] = rdesc[17] = 0x03;
+ }
+ return rdesc;
+}
+
+#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
+ EV_KEY, (c))
+static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
+ return 0;
+
+ switch (usage->hid & HID_USAGE) {
+ case 0x301: ch_map_key_clear(KEY_PROG1); break;
+ case 0x302: ch_map_key_clear(KEY_PROG2); break;
+ case 0x303: ch_map_key_clear(KEY_PROG3); break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static const struct hid_device_id ch_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, ch_devices);
+
+static struct hid_driver ch_driver = {
+ .name = "cherry",
+ .id_table = ch_devices,
+ .report_fixup = ch_report_fixup,
+ .input_mapping = ch_input_mapping,
+};
+module_hid_driver(ch_driver);
+
+MODULE_LICENSE("GPL");