chore(io): remove io_dummy driver

In accordance with [1], delete the io_dummy driver code in preparation
for the v2.9 release.

[1] https://trustedfirmware-a.readthedocs.io/en/latest/about/release-information.html

Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Change-Id: If80573d6f889624ef06b099fd267ee85f3a6331e

docs/about/release-information.rst

@@ -82,8 +82,6 @@ after which it will be removed.
 |                                | Date        | after   |                                                         |
 |                                |             | Release |                                                         |
 +================================+=============+=========+=========================================================+
-| io_dummy driver                |   Nov'22    |   2.9   | No more used by any upstream platform                   |
-+--------------------------------+-------------+---------+---------------------------------------------------------+
 | CryptoCell-712                 |     2.9     |   3.0   | No longer maintained.                                   |
 +--------------------------------+-------------+---------+---------------------------------------------------------+
 | CryptoCell-713                 |     2.9     |   3.0   | No longer maintained.                                   |

drivers/io/io_dummy.c

@@ -1,155 +0,0 @@
-/*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <assert.h>
-#include <string.h>
-
-#include <common/debug.h>
-#include <drivers/io/io_driver.h>
-#include <drivers/io/io_dummy.h>
-#include <drivers/io/io_storage.h>
-
-struct file_state {
-	int in_use;
-	size_t size;
-};
-
-static struct file_state current_file = {0};
-
-/* Identify the device type as dummy */
-static io_type_t device_type_dummy(void)
-{
-	return IO_TYPE_DUMMY;
-}
-
-/* Dummy device functions */
-static int dummy_dev_open(const uintptr_t dev_spec, io_dev_info_t **dev_info);
-static int dummy_block_open(io_dev_info_t *dev_info, const uintptr_t spec,
-			     io_entity_t *entity);
-static int dummy_block_len(io_entity_t *entity, size_t *length);
-static int dummy_block_read(io_entity_t *entity, uintptr_t buffer,
-			     size_t length, size_t *length_read);
-static int dummy_block_close(io_entity_t *entity);
-static int dummy_dev_close(io_dev_info_t *dev_info);
-
-
-static const io_dev_connector_t dummy_dev_connector = {
-	.dev_open = dummy_dev_open
-};
-
-
-static const io_dev_funcs_t dummy_dev_funcs = {
-	.type = device_type_dummy,
-	.open = dummy_block_open,
-	.seek = NULL,
-	.size = dummy_block_len,
-	.read = dummy_block_read,
-	.write = NULL,
-	.close = dummy_block_close,
-	.dev_init = NULL,
-	.dev_close = dummy_dev_close,
-};
-
-
-static const io_dev_info_t dummy_dev_info = {
-	.funcs = &dummy_dev_funcs,
-	.info = (uintptr_t)NULL
-};
-
-
-/* Open a connection to the dummy device */
-static int dummy_dev_open(const uintptr_t dev_spec __attribute__((unused)),
-			   io_dev_info_t **dev_info)
-{
-	assert(dev_info != NULL);
-	*dev_info = (io_dev_info_t *)&dummy_dev_info;
-
-	return 0;
-}
-
-
-/* Close a connection to the dummy device */
-static int dummy_dev_close(io_dev_info_t *dev_info)
-{
-	return 0;
-}
-
-
-/* Open a file on the dummy device */
-static int dummy_block_open(io_dev_info_t *dev_info, const uintptr_t spec,
-			     io_entity_t *entity)
-{
-	int result;
-	const io_block_spec_t *block_spec = (io_block_spec_t *)spec;
-
-	if (current_file.in_use == 0) {
-		assert(block_spec != NULL);
-		assert(entity != NULL);
-
-		current_file.in_use = 1;
-		current_file.size = block_spec->length;
-		entity->info = (uintptr_t)&current_file;
-		result = 0;
-	} else {
-		WARN("A Dummy device is already active. Close first.\n");
-		result = -ENOMEM;
-	}
-
-	return result;
-}
-
-
-/* Return the size of a file on the dummy device */
-static int dummy_block_len(io_entity_t *entity, size_t *length)
-{
-	assert(entity != NULL);
-	assert(length != NULL);
-
-	*length =  ((struct file_state *)entity->info)->size;
-
-	return 0;
-}
-
-
-/* Read data from a file on the dummy device */
-static int dummy_block_read(io_entity_t *entity, uintptr_t buffer,
-			     size_t length, size_t *length_read)
-{
-	assert(length_read != NULL);
-
-	*length_read = length;
-
-	return 0;
-}
-
-
-/* Close a file on the dummy device */
-static int dummy_block_close(io_entity_t *entity)
-{
-	assert(entity != NULL);
-
-	entity->info = 0;
-	current_file.in_use = 0;
-
-	return 0;
-}
-
-
-/* Exported functions */
-
-/* Register the dummy driver with the IO abstraction */
-int register_io_dev_dummy(const io_dev_connector_t **dev_con)
-{
-	int result;
-
-	assert(dev_con != NULL);
-
-	result = io_register_device(&dummy_dev_info);
-	if (result == 0)
-		*dev_con = &dummy_dev_connector;
-
-	return result;
-}

include/drivers/io/io_dummy.h

@@ -1,12 +0,0 @@
-/*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef IO_DUMMY_H
-#define IO_DUMMY_H
-
-int register_io_dev_dummy(const struct io_dev_connector **dev_con);
-
-#endif /* IO_DUMMY_H */

include/drivers/io/io_storage.h

@@ -19,7 +19,6 @@ typedef enum {
 	IO_TYPE_INVALID,
 	IO_TYPE_SEMIHOSTING,
 	IO_TYPE_MEMMAP,
-	IO_TYPE_DUMMY,
 	IO_TYPE_FIRMWARE_IMAGE_PACKAGE,
 	IO_TYPE_BLOCK,
 	IO_TYPE_MTD,