[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/hid/hid-primax.c b/ap/os/linux/linux-3.4.x/drivers/hid/hid-primax.c
new file mode 100644
index 0000000..4d3c60d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/hid/hid-primax.c
@@ -0,0 +1,117 @@
+/*
+ * HID driver for primax and similar keyboards with in-band modifiers
+ *
+ * Copyright 2011 Google Inc. All Rights Reserved
+ *
+ * Author:
+ * Terry Lambert <tlambert@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+static int px_raw_event(struct hid_device *hid, struct hid_report *report,
+ u8 *data, int size)
+{
+ int idx = size;
+
+ switch (report->id) {
+ case 0: /* keyboard input */
+ /*
+ * Convert in-band modifier key values into out of band
+ * modifier bits and pull the key strokes from the report.
+ * Thus a report data set which looked like:
+ *
+ * [00][00][E0][30][00][00][00][00]
+ * (no modifier bits + "Left Shift" key + "1" key)
+ *
+ * Would be converted to:
+ *
+ * [01][00][00][30][00][00][00][00]
+ * (Left Shift modifier bit + "1" key)
+ *
+ * As long as it's in the size range, the upper level
+ * drivers don't particularly care if there are in-band
+ * 0-valued keys, so they don't stop parsing.
+ */
+ while (--idx > 1) {
+ if (data[idx] < 0xE0 || data[idx] > 0xE7)
+ continue;
+ data[0] |= (1 << (data[idx] - 0xE0));
+ data[idx] = 0;
+ }
+ hid_report_raw_event(hid, HID_INPUT_REPORT, data, size, 0);
+ return 1;
+
+ default: /* unknown report */
+ /* Unknown report type; pass upstream */
+ hid_info(hid, "unknown report type %d\n", report->id);
+ break;
+ }
+
+ return 0;
+}
+
+static int px_probe(struct hid_device *hid, const struct hid_device_id *id)
+{
+ int ret;
+
+ ret = hid_parse(hid);
+ if (ret) {
+ hid_err(hid, "parse failed\n");
+ goto fail;
+ }
+
+ ret = hid_hw_start(hid, HID_CONNECT_DEFAULT);
+ if (ret)
+ hid_err(hid, "hw start failed\n");
+
+fail:
+ return ret;
+}
+
+static void px_remove(struct hid_device *hid)
+{
+ hid_hw_stop(hid);
+}
+
+static const struct hid_device_id px_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, px_devices);
+
+static struct hid_driver px_driver = {
+ .name = "primax",
+ .id_table = px_devices,
+ .raw_event = px_raw_event,
+ .probe = px_probe,
+ .remove = px_remove,
+};
+
+static int __init px_init(void)
+{
+ return hid_register_driver(&px_driver);
+}
+
+static void __exit px_exit(void)
+{
+ hid_unregister_driver(&px_driver);
+}
+
+module_init(px_init);
+module_exit(px_exit);
+MODULE_AUTHOR("Terry Lambert <tlambert@google.com>");
+MODULE_LICENSE("GPL");