1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me8255.h b/drivers/staging/meilhaus/me8255.h
new file mode 100644
index 000000000000..338230052b3c
--- /dev/null
+++ b/drivers/staging/meilhaus/me8255.h
@@ -0,0 +1,59 @@
+/**
+ * @file me8255.h
+ *
+ * @brief Meilhaus PIO 8255 implementation.
+ * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _ME8255_H_
+#define _ME8255_H_
+
+#include "mesubdevice.h"
+#include "meslock.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The 8255 subdevice class.
+ */
+typedef struct me8255_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	int *ctrl_reg_mirror;			/**< Pointer to mirror of the control register. */
+	spinlock_t *ctrl_reg_lock;		/**< Spin lock to protect #ctrl_reg and #ctrl_reg_mirror from concurrent access. */
+
+	uint32_t device_id;				/**< The PCI device id of the device holding the 8255 chip. */
+	int me8255_idx;					/**< The index of the 8255 chip on the device. */
+	int dio_idx;					/**< The index of the DIO port on the 8255 chip. */
+
+	unsigned long port_reg;			/**< Register to read or write a value from or to the port respectively. */
+	unsigned long ctrl_reg;			/**< Register to configure the 8255 modes. */
+} me8255_subdevice_t;
+
+/**
+ * @brief The constructor to generate a 8255 instance.
+ *
+ * @param device_id The kind of Meilhaus device holding the 8255.
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ * @param me8255_idx The index of the 8255 chip on the Meilhaus device.
+ * @param dio_idx The index of the counter inside a 8255 chip.
+ * @param ctr_reg_mirror Pointer to mirror of control register.
+ * @param ctrl_reg_lock Pointer to spin lock protecting the 8255 control register and #ctrl_reg_mirror from concurrent access.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me8255_subdevice_t *me8255_constructor(uint32_t device_id,
+				       uint32_t reg_base,
+				       unsigned int me8255_idx,
+				       unsigned int dio_idx,
+				       int *ctrl_reg_mirror,
+				       spinlock_t * ctrl_reg_lock);
+
+#endif
+#endif