Add Infineon v05 TPM driver

drivers/tpm/slb9635_i2c/tddl.c

+/*
+ * Copyright (C) 2011 Infineon Technologies
+ *
+ * Authors:
+ * Peter Huewe <huewe.external@infineon.com>
+ *
+ * description: Infineon_TPM-I2C - TDDL supporting FW 2010.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Version: 2.1.1
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <exports.h>
+
+#include "tddl.h"
+#include "tpm.h"
+
+/* buffer supporting tpm_transmit */
+uint8_t tmpbuf[TPM_BUFSIZE];
+
+/* Open connection to TPM */
+TDDL_RESULT TDDL_Open(uint32_t dev_addr)
+{
+        int rc;
+        dbg_printf("INFO: initialising TPM\n");
+        rc = tpm_open(dev_addr);
+        if (rc < 0) {
+                switch (rc) {
+                        case -EBUSY:  return TDDL_E_ALREADY_OPENED;
+                        case -ENODEV: return TDDL_E_COMPONENT_NOT_FOUND;
+                };
+                return TDDL_E_FAIL;
+        }
+        return TDDL_SUCCESS;
+}
+
+/* Disconnect from the TPM */
+TDDL_RESULT TDDL_Close(void)
+{
+        tpm_close();
+        return TDDL_SUCCESS;
+}
+
+/* Send the TPM Application Protocol Data Unit (APDU) to the TPM and
+ * return the response APDU */
+TDDL_RESULT TDDL_TransmitData(uint8_t *pbTransmitBuf, uint32_t dwTransmitBufLen,
+                             uint8_t *pbReceiveBuf, uint32_t *pdwReceiveBufLen)
+{
+        int len;
+        uint32_t i;
+        TDDL_RESULT rc = TDDL_E_FAIL;
+
+        dbg_printf("--> xTDDL_TransmitData()\n");
+
+        dbg_printf("pbTransmitBuf = ");
+        for (i = 0; i < dwTransmitBufLen; i++)
+                dbg_printf("%02x ", pbTransmitBuf[i]);
+        dbg_printf("\n");
+
+        /* copy buffer to make sure transmit data may be overwritten */
+        memcpy(tmpbuf, pbTransmitBuf, dwTransmitBufLen);
+
+        /* do transmission */
+        len = tpm_transmit(tmpbuf, dwTransmitBufLen);
+
+        if (len >= 10) {
+                memcpy(pbReceiveBuf, tmpbuf, len);
+                dbg_printf("INFO: copied %d bytes into pbReceiveBuf\n", len);
+                *pdwReceiveBufLen = len;
+                rc = TDDL_SUCCESS;
+        } else {
+                dbg_printf("ERROR: tpm_transmit() returned %d\n", len);
+                *pdwReceiveBufLen = 0;
+        }
+
+        dbg_printf("pbReceiveBuf = ");
+        for (i = 0; i < (*pdwReceiveBufLen); i++)
+                dbg_printf("%02x ", pbReceiveBuf[i]);
+        dbg_printf("\n");
+
+        dbg_printf("<-- xTDDL_TransmitData()\n");
+
+        return rc;
+}