Add Infineon v05 TPM driver

drivers/tpm/slb9635_i2c/compatibility.h

+/*******************************************************************************
+**
+** FILENAME:      $Id$
+** COPYRIGHT:     Infineon Technologies
+** DESCRIPTION:   I2C TPM - Compatibility layer to port linux driver to U-Boot
+** CREATION DATE: 2010/11/10
+** LAST CHANGE:   $Date: 2010-10-20 12:04:48 +0200 (Wed, 20 Oct 2010) $
+**                $Author$
+** VERSION:       $Revision: 59 $
+**
+*******************************************************************************/
+
+#ifndef _COMPATIBILITY_H_
+#define _COMPATIBILITY_H_
+
+/* all includes from U-Boot */
+#include <linux/types.h>
+#include <asm-generic/errno.h>
+#include <compiler.h>
+#include <common.h>
+
+/* extended error numbers from linux (see errno.h) */
+#define ECANCELED       125     /* Operation Canceled */
+
+/* simple version, original from drivers/base/base.h */
+struct device_private {
+        void *driver_data;
+};
+
+/* simple version, original from include/linux/device.h */
+struct device {
+        struct device *parent;
+        struct device_private *p;
+        void (*release) (struct device *dev);
+};
+
+/*
+ * Timing concept in u-boot driver
+ * - jiffies is a global variable similar to linux
+ * - instead of sleeping msleep causes delay
+ * - jiffies is incremented inside msleep
+ * - conversion macros are available (not all conditions work)
+ * - tpm driver remains unchanged
+ *
+ * Conversion:  1 jiffie = 1/HZ seconds
+ *              1 second = HZ jiffies
+ *
+ * NOTE: linux kernel configuration for ARM sets HZ to 128,
+ *       timeconst.h then contains automatically generated values for
+ *       arithmetics.
+ */
+/* global timing value */
+extern unsigned long jiffies;
+
+/* conversion functions */
+extern void msleep(unsigned int t);
+extern void msleep2(unsigned int t);
+extern unsigned long usecs_to_jiffies(const unsigned int u);
+extern unsigned long msecs_to_jiffies(const unsigned int u);
+
+#define HZ             1000
+
+/* helper macros */
+#define typecheck(type, x) \
+({      type __dummy; \
+        typeof(x) __dummy2; \
+        (void)(&__dummy == &__dummy2); \

[Che-Liang Chiou, 2011/03/14 08:49:54]

Is it void or void*?

[rongchang, 2011/03/23 11:44:57]

This file is provided by Infineon. Hence will be kept as is.

+        1; \

[Che-Liang Chiou, 2011/03/14 08:49:54]

Does this mean typecheck() alway be evaluated to 1?

[rongchang, 2011/03/23 11:44:57]

Same as above.

+})
+
+/* time relation ships */
+#define time_after(a, b)                \
+        (typecheck(unsigned long, a) && \
+         typecheck(unsigned long, b) && \
+         ((long)(b) - (long)(a) < 0))

[Che-Liang Chiou, 2011/03/14 08:49:54]

Why not ((unsigned long)(b) < (unsigned long)(c)) ?

[rongchang, 2011/03/23 11:44:57]

Same as above.

+#define time_before(a, b)       time_after(b, a)
+
+/* XXX Currently, an open issue with the cortex-a8 data abort trap
+ * prevents us from using the be32_to_cpu macros. Non-aligned data
+ * accesses hang-up program. Casting from 8- to 32-bit pointer is not
+ * working.
+ */
+static inline u32 switch_endian32(const u8 *buf)
+{
+        return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | (buf[3]);
+}
+
+#if defined(DEBUG)
+#  define dev_dbg(dev, format, arg...) printf(format, ##arg)
+#else
+#  define dev_dbg(dev, format, arg...) while (0);
+#endif
+#define dev_err(dev, format, arg...) printf(format, ##arg)
+#define dev_info(dev, format, arg...) printf(format, ##arg)
+
+#if defined(DEBUG)
+# define dbg_printf(fmt, arg...) printf(fmt, ##arg)
+#else
+# define dbg_printf(fmt, arg...) while (0);
+#endif
+
+/* dummy for export */
+#define EXPORT_SYMBOL_GPL(x)
+
+#define module_init(x)
+#define module_exit(x)
+#define MODULE_AUTHOR(x)
+#define MODULE_DESCRIPTION(x)
+#define MODULE_VERSION(x)
+#define MODULE_LICENSE(x)
+
+#endif