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path: root/drivers/renesas/rcar/io/io_memdrv.c
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Diffstat (limited to 'drivers/renesas/rcar/io/io_memdrv.c')
-rw-r--r--drivers/renesas/rcar/io/io_memdrv.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/renesas/rcar/io/io_memdrv.c b/drivers/renesas/rcar/io/io_memdrv.c
new file mode 100644
index 0000000000..e55fd64665
--- /dev/null
+++ b/drivers/renesas/rcar/io/io_memdrv.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+#include <io_driver.h>
+#include <io_storage.h>
+#include <string.h>
+
+#include "io_common.h"
+#include "io_private.h"
+#include "io_memdrv.h"
+#include "rcar_def.h"
+
+extern void rcar_dma_exec(uintptr_t dst, uint32_t src, uint32_t len);
+
+static int32_t memdrv_dev_open(const uintptr_t dev __attribute__ ((unused)),
+ io_dev_info_t **dev_info);
+static int32_t memdrv_dev_close(io_dev_info_t *dev_info);
+
+/* As we need to be able to keep state for seek, only one file can be open
+ * at a time. Make this a structure and point to the entity->info. When we
+ * can malloc memory we can change this to support more open files.
+ */
+typedef struct {
+ uint32_t in_use;
+ uintptr_t base;
+ ssize_t file_pos;
+} file_state_t;
+
+static file_state_t current_file = { 0 };
+
+static io_type_t device_type_memdrv(void)
+{
+ return IO_TYPE_MEMMAP;
+}
+
+static int32_t memdrv_block_open(io_dev_info_t *dev_info, const uintptr_t spec,
+ io_entity_t *entity)
+{
+ const io_drv_spec_t *block_spec = (io_drv_spec_t *) spec;
+
+ /* Since we need to track open state for seek() we only allow one open
+ * spec at a time. When we have dynamic memory we can malloc and set
+ * entity->info.
+ */
+ if (current_file.in_use)
+ return IO_RESOURCES_EXHAUSTED;
+
+ /* File cursor offset for seek and incremental reads etc. */
+ current_file.base = block_spec->offset;
+ current_file.file_pos = 0;
+ current_file.in_use = 1;
+
+ entity->info = (uintptr_t) &current_file;
+
+ return IO_SUCCESS;
+}
+
+static int32_t memdrv_block_seek(io_entity_t *entity, int32_t mode,
+ ssize_t offset)
+{
+ if (mode != IO_SEEK_SET)
+ return IO_FAIL;
+
+ ((file_state_t *) entity->info)->file_pos = offset;
+
+ return IO_SUCCESS;
+}
+
+static int32_t memdrv_block_read(io_entity_t *entity, uintptr_t buffer,
+ size_t length, size_t *cnt)
+{
+ file_state_t *fp;
+
+ fp = (file_state_t *) entity->info;
+
+ NOTICE("BL2: dst=0x%lx src=0x%lx len=%ld(0x%lx)\n",
+ buffer, fp->base + fp->file_pos, length, length);
+
+ if (FLASH_MEMORY_SIZE < fp->file_pos + length) {
+ ERROR("BL2: check load image (source address)\n");
+ return IO_FAIL;
+ }
+
+ rcar_dma_exec(buffer, fp->base + fp->file_pos, length);
+ fp->file_pos += length;
+ *cnt = length;
+
+ return IO_SUCCESS;
+}
+
+static int32_t memdrv_block_close(io_entity_t *entity)
+{
+ entity->info = 0U;
+
+ memset((void *)&current_file, 0, sizeof(current_file));
+
+ return IO_SUCCESS;
+}
+
+static const io_dev_funcs_t memdrv_dev_funcs = {
+ .type = &device_type_memdrv,
+ .open = &memdrv_block_open,
+ .seek = &memdrv_block_seek,
+ .size = NULL,
+ .read = &memdrv_block_read,
+ .write = NULL,
+ .close = &memdrv_block_close,
+ .dev_init = NULL,
+ .dev_close = &memdrv_dev_close,
+};
+
+static const io_dev_info_t memdrv_dev_info = {
+ .funcs = &memdrv_dev_funcs,
+ .info = 0,
+};
+
+static const io_dev_connector_t memdrv_dev_connector = {
+ .dev_open = &memdrv_dev_open
+};
+
+static int32_t memdrv_dev_open(const uintptr_t dev __attribute__ ((unused)),
+ io_dev_info_t **dev_info)
+{
+ *dev_info = (io_dev_info_t *) &memdrv_dev_info;
+
+ return IO_SUCCESS;
+}
+
+static int32_t memdrv_dev_close(io_dev_info_t *dev_info)
+{
+ return IO_SUCCESS;
+}
+
+int32_t rcar_register_io_dev_memdrv(const io_dev_connector_t **dev_con)
+{
+ int32_t result;
+
+ result = io_register_device(&memdrv_dev_info);
+ if (result == IO_SUCCESS)
+ *dev_con = &memdrv_dev_connector;
+
+ return result;
+}