summaryrefslogtreecommitdiff
path: root/include/linux/libps2.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/libps2.h')
-rw-r--r--include/linux/libps2.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/libps2.h b/include/linux/libps2.h
new file mode 100644
index 000000000..4ad06e824
--- /dev/null
+++ b/include/linux/libps2.h
@@ -0,0 +1,56 @@
+#ifndef _LIBPS2_H
+#define _LIBPS2_H
+
+/*
+ * Copyright (C) 1999-2002 Vojtech Pavlik
+ * Copyright (C) 2004 Dmitry Torokhov
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+
+#define PS2_CMD_GETID 0x02f2
+#define PS2_CMD_RESET_BAT 0x02ff
+
+#define PS2_RET_BAT 0xaa
+#define PS2_RET_ID 0x00
+#define PS2_RET_ACK 0xfa
+#define PS2_RET_NAK 0xfe
+#define PS2_RET_ERR 0xfc
+
+#define PS2_FLAG_ACK 1 /* Waiting for ACK/NAK */
+#define PS2_FLAG_CMD 2 /* Waiting for command to finish */
+#define PS2_FLAG_CMD1 4 /* Waiting for the first byte of command response */
+#define PS2_FLAG_WAITID 8 /* Command execiting is GET ID */
+#define PS2_FLAG_NAK 16 /* Last transmission was NAKed */
+
+struct ps2dev {
+ struct serio *serio;
+
+ /* Ensures that only one command is executing at a time */
+ struct mutex cmd_mutex;
+
+ /* Used to signal completion from interrupt handler */
+ wait_queue_head_t wait;
+
+ unsigned long flags;
+ unsigned char cmdbuf[8];
+ unsigned char cmdcnt;
+ unsigned char nak;
+};
+
+void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
+int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
+void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
+void ps2_begin_command(struct ps2dev *ps2dev);
+void ps2_end_command(struct ps2dev *ps2dev);
+int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
+int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
+int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
+int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
+void ps2_cmd_aborted(struct ps2dev *ps2dev);
+int ps2_is_keyboard_id(char id);
+
+#endif /* _LIBPS2_H */