dfu: add DFU virtual backend
Add a virtual DFU backend to allow board specific read and write
(for OTP update for example).
Acked-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/dfu/Kconfig b/drivers/dfu/Kconfig
index 1e1dff3..9fe5bc0 100644
--- a/drivers/dfu/Kconfig
+++ b/drivers/dfu/Kconfig
@@ -60,5 +60,12 @@
help
This option enables using DFU to read and write to on any MTD device.
+config DFU_VIRT
+ bool "VIRTUAL flash back end for DFU"
+ help
+ This option enables using DFU to read and write to VIRTUAL device
+ used at board level to manage specific behavior
+ (OTP update for example).
+
endif
endmenu
diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index ebb119f..0d7925c 100644
--- a/drivers/dfu/Makefile
+++ b/drivers/dfu/Makefile
@@ -10,3 +10,4 @@
obj-$(CONFIG_$(SPL_)DFU_RAM) += dfu_ram.o
obj-$(CONFIG_$(SPL_)DFU_SF) += dfu_sf.o
obj-$(CONFIG_$(SPL_)DFU_TFTP) += dfu_tftp.o
+obj-$(CONFIG_$(SPL_)DFU_VIRT) += dfu_virt.o
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
index 4f4a07b7..2697235 100644
--- a/drivers/dfu/dfu.c
+++ b/drivers/dfu/dfu.c
@@ -474,6 +474,9 @@
} else if (strcmp(interface, "sf") == 0) {
if (dfu_fill_entity_sf(dfu, devstr, s))
return -1;
+ } else if (strcmp(interface, "virt") == 0) {
+ if (dfu_fill_entity_virt(dfu, devstr, s))
+ return -1;
} else {
printf("%s: Device %s not (yet) supported!\n",
__func__, interface);
@@ -569,7 +572,7 @@
const char *dfu_get_dev_type(enum dfu_device_type t)
{
const char *const dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM",
- "SF", "MTD"};
+ "SF", "MTD", "VIRT"};
return dev_t[t];
}
diff --git a/drivers/dfu/dfu_virt.c b/drivers/dfu/dfu_virt.c
new file mode 100644
index 0000000..ea8c71f
--- /dev/null
+++ b/drivers/dfu/dfu_virt.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
+ */
+#include <common.h>
+#include <dfu.h>
+#include <errno.h>
+#include <malloc.h>
+
+int __weak dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset,
+ void *buf, long *len)
+{
+ debug("%s: off=0x%llx, len=0x%x\n", __func__, offset, (u32)*len);
+
+ return 0;
+}
+
+int __weak dfu_get_medium_size_virt(struct dfu_entity *dfu, u64 *size)
+{
+ *size = 0;
+
+ return 0;
+}
+
+int __weak dfu_read_medium_virt(struct dfu_entity *dfu, u64 offset,
+ void *buf, long *len)
+{
+ debug("%s: off=0x%llx, len=0x%x\n", __func__, offset, (u32)*len);
+ *len = 0;
+
+ return 0;
+}
+
+int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, char *s)
+{
+ debug("%s: devstr = %s\n", __func__, devstr);
+
+ dfu->dev_type = DFU_DEV_VIRT;
+ dfu->layout = DFU_RAW_ADDR;
+ dfu->data.virt.dev_num = simple_strtoul(devstr, NULL, 10);
+
+ dfu->write_medium = dfu_write_medium_virt;
+ dfu->get_medium_size = dfu_get_medium_size_virt;
+ dfu->read_medium = dfu_read_medium_virt;
+
+ dfu->inited = 0;
+
+ return 0;
+}