[U-Boot] [PATCH v3 4/7] dfu: MMC specific routines for DFU operation

[Lukasz Majewski]

Support for MMC storage devices to work with DFU framework.

Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Marek Vasut <marex at denx.de>

---
Changes for v2:
- None

Changes for v3:
- Provide special abstraction layer (mmc_{block|file}_{read|write})
  to alleviate switch to new device model (DM)
- More verbose messages when not supported layout encountered
- Calls to strncmp() replaced with strcmp()
---
 drivers/dfu/Makefile  |    1 +
 drivers/dfu/dfu_mmc.c |  165 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 166 insertions(+), 0 deletions(-)
 create mode 100644 drivers/dfu/dfu_mmc.c

diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index 7736485..7b717bc 100644
--- a/drivers/dfu/Makefile
+++ b/drivers/dfu/Makefile
@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)libdfu.o
 
 COBJS-$(CONFIG_DFU_FUNCTION) += dfu.o
+COBJS-$(CONFIG_DFU_MMC) += dfu_mmc.o
 
 SRCS    := $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS-y))
diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c
new file mode 100644
index 0000000..3909910
--- /dev/null
+++ b/drivers/dfu/dfu_mmc.c
@@ -0,0 +1,165 @@
+/*
+ * dfu.c -- DFU back-end routines
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * author: Lukasz Majewski <l.majewski at samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <dfu.h>
+
+enum dfu_mmc_op {
+	DFU_OP_READ = 1,
+	DFU_OP_WRITE,
+};
+
+static int mmc_block_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
+			void *buf, long *len)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(char, cmd_buf, DFU_CMD_BUF_SIZE);
+	memset(cmd_buf, '\0', sizeof(cmd_buf));
+
+	sprintf(cmd_buf, "mmc %s 0x%x %x %x",
+		op == DFU_OP_READ ? "read" : "write",
+		(unsigned int) buf,
+		dfu->data.mmc.lba_start,
+		dfu->data.mmc.lba_size);
+
+	if (op == DFU_OP_READ)
+		*len = dfu->data.mmc.lba_blk_size * dfu->data.mmc.lba_size;
+
+	debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
+	return run_command(cmd_buf, 0);
+}
+
+static inline int mmc_block_write(struct dfu_entity *dfu, void *buf, long *len)
+{
+	return mmc_block_op(DFU_OP_WRITE, dfu, buf, len);
+}
+
+static inline int mmc_block_read(struct dfu_entity *dfu, void *buf, long *len)
+{
+	return mmc_block_op(DFU_OP_READ, dfu, buf, len);
+}
+
+static int mmc_file_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
+			void *buf, long *len)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(char, cmd_buf, DFU_CMD_BUF_SIZE);
+	char *str_env;
+	int ret;
+
+	memset(cmd_buf, '\0', sizeof(cmd_buf));
+
+	sprintf(cmd_buf, "fat%s mmc %d:%d 0x%x %s %lx",
+		op == DFU_OP_READ ? "load" : "write",
+		dfu->data.mmc.dev, dfu->data.mmc.part,
+		(unsigned int) buf, dfu->name, *len);
+
+	debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
+
+	ret = run_command(cmd_buf, 0);
+	if (ret) {
+		puts("dfu: Read error!\n");
+		return ret;
+	}
+
+	if (dfu->layout != DFU_RAW_ADDR) {
+		str_env = getenv("filesize");
+		if (str_env == NULL) {
+			puts("dfu: Wrong file size!\n");
+			return -1;
+		}
+		*len = simple_strtoul(str_env, NULL, 16);
+	}
+
+	return ret;
+}
+
+static inline int mmc_file_write(struct dfu_entity *dfu, void *buf, long *len)
+{
+	return mmc_file_op(DFU_OP_WRITE, dfu, buf, len);
+}
+
+static inline int mmc_file_read(struct dfu_entity *dfu, void *buf, long *len)
+{
+	return mmc_file_op(DFU_OP_READ, dfu, buf, len);
+}
+
+int dfu_write_medium_mmc(struct dfu_entity *dfu, void *buf, long *len)
+{
+	int ret = -1;
+
+	switch (dfu->layout) {
+	case DFU_RAW_ADDR:
+		ret = mmc_block_write(dfu, buf, len);
+		break;
+	case DFU_FS_FAT:
+		ret = mmc_file_write(dfu, buf, len);
+		break;
+	default:
+		printf("%s: Layout (%s) not (yet) supported!\n", __func__,
+		       dfu_get_layout(dfu->layout));
+	}
+
+	return ret;
+}
+
+int dfu_read_medium_mmc(struct dfu_entity *dfu, void *buf, long *len)
+{
+	int ret = -1;
+
+	switch (dfu->layout) {
+	case DFU_RAW_ADDR:
+		ret = mmc_block_read(dfu, buf, len);
+		break;
+	case DFU_FS_FAT:
+		ret = mmc_file_read(dfu, buf, len);
+		break;
+	default:
+		printf("%s: Layout (%s) not (yet) supported!\n", __func__,
+		       dfu_get_layout(dfu->layout));
+	}
+
+	return ret;
+}
+
+int dfu_fill_entity_mmc(struct dfu_entity *dfu, char* s)
+{
+	char *st;
+
+	dfu->dev_type = DFU_DEV_MMC;
+	st = strsep(&s, " ");
+	if (!strcmp(st, "mmc")) {
+		dfu->layout = DFU_RAW_ADDR;
+		dfu->data.mmc.lba_start = simple_strtoul(s, &s, 16);
+		dfu->data.mmc.lba_size = simple_strtoul(++s, &s, 16);
+		dfu->data.mmc.lba_blk_size = get_mmc_blk_size(dfu->dev_num);
+	} else if (!strcmp(st, "fat")) {
+		dfu->layout = DFU_FS_FAT;
+		dfu->data.mmc.dev = simple_strtoul(s, &s, 10);
+		dfu->data.mmc.part = simple_strtoul(++s, &s, 10);
+	} else {
+		printf("%s: Memory layout (%s) not supported!\n", __func__, st);
+	}
+
+	dfu->read_medium = dfu_read_medium_mmc;
+	dfu->write_medium = dfu_write_medium_mmc;
+
+	return 0;
+}
-- 
1.7.2.3