IO: support block device type

FIP is accessed as memory-mapped type. eMMC is block device type.
In order to support FIP based on eMMC, add the new io_block layer.

io_block always access eMMC device as block size. And it'll only
copy the required data into buffer in io_block driver. So preparing
an temporary buffer is required.

When use io_block device, MAX_IO_BLOCK_DEVICES should be declared
in platform_def.h. It's used to support multiple block devices.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

2 files changed, 53 insertions, 0 deletions

diff --git a/include/drivers/io/io_block.h b/include/drivers/io/io_block.h
new file mode 100644
index 00000000..ebf43cd0
--- /dev/null
+++ b/include/drivers/io/io_block.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __IO_BLOCK_H__
+#define __IO_BLOCK_H__
+
+#include <io_storage.h>
+
+/* block devices ops */
+typedef struct io_block_ops {
+	size_t	(*read)(int lba, uintptr_t buf, size_t size);
+	size_t	(*write)(int lba, const uintptr_t buf, size_t size);
+} io_block_ops_t;
+
+typedef struct io_block_dev_spec {
+	io_block_spec_t	buffer;
+	io_block_ops_t	ops;
+	size_t		block_size;
+} io_block_dev_spec_t;
+
+struct io_dev_connector;
+
+int register_io_dev_block(const struct io_dev_connector **dev_con);
+
+#endif /* __IO_BLOCK_H__ */
diff --git a/include/drivers/io/io_storage.h b/include/drivers/io/io_storage.h
index 970ab2cd..243f6883 100644
--- a/include/drivers/io/io_storage.h
+++ b/include/drivers/io/io_storage.h
@@ -44,6 +44,7 @@ typedef enum {
 	IO_TYPE_SEMIHOSTING,
 	IO_TYPE_MEMMAP,
 	IO_TYPE_FIRMWARE_IMAGE_PACKAGE,
+	IO_TYPE_BLOCK,
 	IO_TYPE_MAX
 } io_type_t;