[U-Boot] [PATCH v4 1/5] usb/gadget: fastboot: add eMMC support for flash command

Steve Rae
2014-08-06T23:55:09Z

- add support for 'fastboot flash' command for eMMC devices

Signed-off-by: Steve Rae <srae@broadcom.com>
---

Changes in v4:
- rearranged this patchset so that "sparse_format.h" can be dropped (if we cannot
resolve the copyright/licensing issues)
- update mmc_get_dev(...) to get_dev("mmc",....)
- update printf() to puts() where applicable

Changes in v3:
- remove most references to 'mmc',
which leaves only one mmc specific function: mmc_get_dev()

Changes in v2:
- split large function into three
- improved handling of response messages
- additional partition size checking when writing sparse image

common/Makefile | 5 ++++
common/fb_mmc.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
include/fb_mmc.h | 8 ++++++
3 files changed, 95 insertions(+)
create mode 100644 common/fb_mmc.c
create mode 100644 include/fb_mmc.h

diff --git a/common/Makefile b/common/Makefile
index de5cce8..daebe39 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -266,4 +266,9 @@ obj-$(CONFIG_IO_TRACE) += iotrace.o
obj-y += memsize.o
obj-y += stdio.o

+# This option is not just y/n - it can have a numeric value
+ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
+obj-y += fb_mmc.o
+endif
+
CFLAGS_env_embedded.o := -Wa,--no-warn -DENV_CRC=$(shell tools/envcrc 2>/dev/null)
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
new file mode 100644
index 0000000..f42a115
--- /dev/null
+++ b/common/fb_mmc.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2014 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fb_mmc.h>
+#include <part.h>
+
+/* The 64 defined bytes plus \0 */
+#define RESPONSE_LEN (64 + 1)
+
+static char *response_str;
+
+static void fastboot_resp(const char *s)
+{
+ strncpy(response_str, s, RESPONSE_LEN);
+ response_str[RESPONSE_LEN - 1] = '\0';
+}
+
+static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
+ const char *part_name, void *buffer,
+ unsigned int download_bytes)
+{
+ lbaint_t blkcnt;
+ lbaint_t blks;
+
+ /* determine number of blocks to write */
+ blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
+ blkcnt = blkcnt / info->blksz;
+
+ if (blkcnt > info->size) {
+ printf("%s: too large for partition: '%s'\n", __func__,
+ part_name);
+ fastboot_resp("FAILtoo large for partition");
+ return;
+ }
+
+ puts("Flashing Raw Image\n");
+
+ blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt,
+ buffer);
+ if (blks != blkcnt) {
+ printf("%s: failed writing to device %d\n", __func__,
+ dev_desc->dev);
+ fastboot_resp("FAILfailed writing to device");
+ return;
+ }
+
+ printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
+ part_name);
+ fastboot_resp("OKAY");
+}
+
+void fb_mmc_flash_write(const char *cmd, void *download_buffer,
+ unsigned int download_bytes, char *response)
+{
+ int ret;
+ block_dev_desc_t *dev_desc;
+ disk_partition_t info;
+
+ /* initialize the response buffer */
+ response_str = response;
+
+ dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+ if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
+ printf("%s: invalid mmc device\n", __func__);
+ fastboot_resp("FAILinvalid mmc device");
+ return;
+ }
+
+ ret = get_partition_info_efi_by_name(dev_desc, cmd, &info);
+ if (ret) {
+ printf("%s: cannot find partition: '%s'\n", __func__, cmd);
+ fastboot_resp("FAILcannot find partition");
+ return;
+ }
+
+ write_raw_image(dev_desc, &info, cmd, download_buffer,
+ download_bytes);
+}
diff --git a/include/fb_mmc.h b/include/fb_mmc.h
new file mode 100644
index 0000000..1ad1d13
--- /dev/null
+++ b/include/fb_mmc.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright 2014 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+void fb_mmc_flash_write(const char *cmd, void *download_buffer,
+ unsigned int download_bytes, char *response);
--
1.8.5