Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 167 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/tpm/tpm_atmel_twi.c b/roms/u-boot/drivers/tpm/tpm_atmel_twi.c
new file mode 100644
index 000000000..2dcc2af67
--- /dev/null
+++ b/roms/u-boot/drivers/tpm/tpm_atmel_twi.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2013 Guntermann & Drunck, GmbH
+ *
+ * Written by Dirk Eibach <dirk.eibach@gdsys.cc>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <tpm-v1.h>
+#include <i2c.h>
+#include <asm/unaligned.h>
+#include <linux/delay.h>
+
+#include "tpm_internal.h"
+
+#define ATMEL_TPM_TIMEOUT_MS 5000 /* sufficient for anything but
+				     generating/exporting keys */
+
+/*
+ * tpm_atmel_twi_open()
+ *
+ * Requests access to locality 0 for the caller. After all commands have been
+ * completed the caller is supposed to call tis_close().
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+static int tpm_atmel_twi_open(struct udevice *dev)
+{
+	return 0;
+}
+
+/*
+ * tpm_atmel_twi_close()
+ *
+ * terminate the currect session with the TPM by releasing the locked
+ * locality. Returns 0 on success of -1 on failure (in case lock
+ * removal did not succeed).
+ */
+static int tpm_atmel_twi_close(struct udevice *dev)
+{
+	return 0;
+}
+
+/*
+ * tpm_atmel_twi_get_desc()
+ *
+ * @dev:        Device to check
+ * @buf:        Buffer to put the string
+ * @size:       Maximum size of buffer
+ * @return length of string, or -ENOSPC it no space
+ */
+static int tpm_atmel_twi_get_desc(struct udevice *dev, char *buf, int size)
+{
+	return 0;
+}
+
+/*
+ * tpm_atmel_twi_xfer()
+ *
+ * Send the requested data to the TPM and then try to get its response
+ *
+ * @sendbuf - buffer of the data to send
+ * @send_size size of the data to send
+ * @recvbuf - memory to save the response to
+ * @recv_len - pointer to the size of the response buffer
+ *
+ * Returns 0 on success (and places the number of response bytes at recv_len)
+ * or -1 on failure.
+ */
+static int tpm_atmel_twi_xfer(struct udevice *dev,
+			      const uint8_t *sendbuf, size_t send_size,
+			      uint8_t *recvbuf, size_t *recv_len)
+{
+	int res;
+	unsigned long start;
+
+#ifdef DEBUG
+	memset(recvbuf, 0xcc, *recv_len);
+	printf("send to TPM (%d bytes, recv_len=%d):\n", send_size, *recv_len);
+	print_buffer(0, (void *)sendbuf, 1, send_size, 0);
+#endif
+
+#if !CONFIG_IS_ENABLED(DM_I2C)
+	res = i2c_write(0x29, 0, 0, (uchar *)sendbuf, send_size);
+#else
+	res = dm_i2c_write(dev, 0, sendbuf, send_size);
+#endif
+	if (res) {
+		printf("i2c_write returned %d\n", res);
+		return -1;
+	}
+
+	start = get_timer(0);
+#if !CONFIG_IS_ENABLED(DM_I2C)
+	while ((res = i2c_read(0x29, 0, 0, recvbuf, 10)))
+#else
+	while ((res = dm_i2c_read(dev, 0, recvbuf, 10)))
+#endif
+	{
+		/* TODO Use TIS_TIMEOUT from tpm_tis_infineon.h */
+		if (get_timer(start) > ATMEL_TPM_TIMEOUT_MS) {
+			puts("tpm timed out\n");
+			return -1;
+		}
+		udelay(100);
+	}
+	if (!res) {
+		unsigned int hdr_recv_len;
+		hdr_recv_len = get_unaligned_be32(recvbuf + 2);
+		if (hdr_recv_len < 10) {
+			puts("tpm response header too small\n");
+			return -1;
+		} else if (hdr_recv_len > *recv_len) {
+			puts("tpm response length is bigger than receive buffer\n");
+			return -1;
+		} else {
+			*recv_len = hdr_recv_len;
+#if !CONFIG_IS_ENABLED(DM_I2C)
+			res = i2c_read(0x29, 0, 0, recvbuf, *recv_len);
+#else
+			res = dm_i2c_read(dev, 0, recvbuf, *recv_len);
+#endif
+
+		}
+	}
+	if (res) {
+		printf("i2c_read returned %d (rlen=%d)\n", res, *recv_len);
+#ifdef DEBUG
+		print_buffer(0, recvbuf, 1, *recv_len, 0);
+#endif
+	}
+
+#ifdef DEBUG
+	if (!res) {
+		printf("read from TPM (%d bytes):\n", *recv_len);
+		print_buffer(0, recvbuf, 1, *recv_len, 0);
+	}
+#endif
+
+	return res;
+}
+
+static int tpm_atmel_twi_probe(struct udevice *dev)
+{
+	return 0;
+}
+
+static const struct udevice_id tpm_atmel_twi_ids[] = {
+	{ .compatible = "atmel,at97sc3204t"},
+	{ }
+};
+
+static const struct tpm_ops tpm_atmel_twi_ops = {
+	.open = tpm_atmel_twi_open,
+	.close = tpm_atmel_twi_close,
+	.xfer = tpm_atmel_twi_xfer,
+	.get_desc = tpm_atmel_twi_get_desc,
+};
+
+U_BOOT_DRIVER(tpm_atmel_twi) = {
+	.name = "tpm_atmel_twi",
+	.id = UCLASS_TPM,
+	.of_match = tpm_atmel_twi_ids,
+	.ops = &tpm_atmel_twi_ops,
+	.probe = tpm_atmel_twi_probe,
+};