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Diffstat (limited to 'drivers/comedi/drivers/8255.h')
-rw-r--r--drivers/comedi/drivers/8255.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/8255.h b/drivers/comedi/drivers/8255.h
new file mode 100644
index 000000000000..ceae3ca52e60
--- /dev/null
+++ b/drivers/comedi/drivers/8255.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * module/8255.h
+ * Header file for 8255
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
+ */
+
+#ifndef _8255_H
+#define _8255_H
+
+#define I8255_SIZE 0x04
+
+#define I8255_DATA_A_REG 0x00
+#define I8255_DATA_B_REG 0x01
+#define I8255_DATA_C_REG 0x02
+#define I8255_CTRL_REG 0x03
+#define I8255_CTRL_C_LO_IO BIT(0)
+#define I8255_CTRL_B_IO BIT(1)
+#define I8255_CTRL_B_MODE BIT(2)
+#define I8255_CTRL_C_HI_IO BIT(3)
+#define I8255_CTRL_A_IO BIT(4)
+#define I8255_CTRL_A_MODE(x) ((x) << 5)
+#define I8255_CTRL_CW BIT(7)
+
+struct comedi_device;
+struct comedi_subdevice;
+
+int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
+ int (*io)(struct comedi_device *dev, int dir, int port,
+ int data, unsigned long regbase),
+ unsigned long regbase);
+
+int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
+ int (*io)(struct comedi_device *dev, int dir, int port,
+ int data, unsigned long regbase),
+ unsigned long regbase);
+
+unsigned long subdev_8255_regbase(struct comedi_subdevice *s);
+
+#endif