tpm: disociate TPMv1.x specific and generic code

There are no changes in this commit but a new organization of the code
as follow.

* cmd/ directory:
        > move existing code from cmd/tpm.c in cmd/tpm-common.c
	> move specific code in cmd/tpm-v1.c
	> create a specific header file with generic definitions for
	  commands only called cmd/tpm-user-utils.h

* lib/ directory:
        > move existing code from lib/tpm.c in lib/tpm-common.c
	> move specific code in lib/tpm-v1.c
	> create a specific header file with generic definitions for
	  the library itself called lib/tpm-utils.h

* include/ directory:
        > move existing code from include/tpm.h in include/tpm-common.h
	> move specific code in include/tpm-v1.h

Code designated as 'common' is compiled if TPM are used. Code designated
as 'specific' is compiled only if the right specification has been
selected.

All files include tpm-common.h.
Files in cmd/ include tpm-user-utils.h.
Files in lib/ include tpm-utils.h.
Depending on the specification, files may include either (not both)
tpm-v1.h or tpm-v2.h.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Fix a few more cases of tpm.h -> tpm-v1.h, some Kconfig logic]
Signed-off-by: Tom Rini <trini@konsulko.com>

1 files changed, 188 insertions, 0 deletions

diff --git a/lib/tpm-common.c b/lib/tpm-common.c
new file mode 100644
index 0000000000..4c2b9393c4
--- /dev/null
+++ b/lib/tpm-common.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2013 The Chromium OS Authors.
+ * Coypright (c) 2013 Guntermann & Drunck GmbH
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/unaligned.h>
+#include <tpm-common.h>
+#include "tpm-utils.h"
+
+int pack_byte_string(u8 *str, size_t size, const char *format, ...)
+{
+	va_list args;
+	size_t offset = 0, length = 0;
+	u8 *data = NULL;
+	u32 value = 0;
+
+	va_start(args, format);
+	for (; *format; format++) {
+		switch (*format) {
+		case 'b':
+			offset = va_arg(args, size_t);
+			value = va_arg(args, int);
+			length = 1;
+			break;
+		case 'w':
+			offset = va_arg(args, size_t);
+			value = va_arg(args, int);
+			length = 2;
+			break;
+		case 'd':
+			offset = va_arg(args, size_t);
+			value = va_arg(args, u32);
+			length = 4;
+			break;
+		case 's':
+			offset = va_arg(args, size_t);
+			data = va_arg(args, u8 *);
+			length = va_arg(args, u32);
+			break;
+		default:
+			debug("Couldn't recognize format string\n");
+			va_end(args);
+			return -1;
+		}
+
+		if (offset + length > size) {
+			va_end(args);
+			return -1;
+		}
+
+		switch (*format) {
+		case 'b':
+			str[offset] = value;
+			break;
+		case 'w':
+			put_unaligned_be16(value, str + offset);
+			break;
+		case 'd':
+			put_unaligned_be32(value, str + offset);
+			break;
+		case 's':
+			memcpy(str + offset, data, length);
+			break;
+		}
+	}
+	va_end(args);
+
+	return 0;
+}
+
+int unpack_byte_string(const u8 *str, size_t size, const char *format, ...)
+{
+	va_list args;
+	size_t offset = 0, length = 0;
+	u8 *ptr8 = NULL;
+	u16 *ptr16 = NULL;
+	u32 *ptr32 = NULL;
+
+	va_start(args, format);
+	for (; *format; format++) {
+		switch (*format) {
+		case 'b':
+			offset = va_arg(args, size_t);
+			ptr8 = va_arg(args, u8 *);
+			length = 1;
+			break;
+		case 'w':
+			offset = va_arg(args, size_t);
+			ptr16 = va_arg(args, u16 *);
+			length = 2;
+			break;
+		case 'd':
+			offset = va_arg(args, size_t);
+			ptr32 = va_arg(args, u32 *);
+			length = 4;
+			break;
+		case 's':
+			offset = va_arg(args, size_t);
+			ptr8 = va_arg(args, u8 *);
+			length = va_arg(args, u32);
+			break;
+		default:
+			va_end(args);
+			debug("Couldn't recognize format string\n");
+			return -1;
+		}
+
+		if (offset + length > size) {
+			va_end(args);
+			return -1;
+		}
+
+		switch (*format) {
+		case 'b':
+			*ptr8 = str[offset];
+			break;
+		case 'w':
+			*ptr16 = get_unaligned_be16(str + offset);
+			break;
+		case 'd':
+			*ptr32 = get_unaligned_be32(str + offset);
+			break;
+		case 's':
+			memcpy(ptr8, str + offset, length);
+			break;
+		}
+	}
+	va_end(args);
+
+	return 0;
+}
+
+u32 tpm_command_size(const void *command)
+{
+	const size_t command_size_offset = 2;
+
+	return get_unaligned_be32(command + command_size_offset);
+}
+
+u32 tpm_return_code(const void *response)
+{
+	const size_t return_code_offset = 6;
+
+	return get_unaligned_be32(response + return_code_offset);
+}
+
+u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr)
+{
+	struct udevice *dev;
+	int err, ret;
+	u8 response_buffer[COMMAND_BUFFER_SIZE];
+	size_t response_length;
+
+	if (response) {
+		response_length = *size_ptr;
+	} else {
+		response = response_buffer;
+		response_length = sizeof(response_buffer);
+	}
+
+	ret = uclass_first_device_err(UCLASS_TPM, &dev);
+	if (ret)
+		return ret;
+	err = tpm_xfer(dev, command, tpm_command_size(command),
+		       response, &response_length);
+
+	if (err < 0)
+		return TPM_LIB_ERROR;
+	if (size_ptr)
+		*size_ptr = response_length;
+
+	return tpm_return_code(response);
+}
+
+int tpm_init(void)
+{
+	struct udevice *dev;
+	int err;
+
+	err = uclass_first_device_err(UCLASS_TPM, &dev);
+	if (err)
+		return err;
+
+	return tpm_open(dev);
+}