dfu: DFU backend implementation

New, separate driver at ./drivers/dfu has been added. It allows platform
and storage independent operation of DFU.
It has been extended to use new MMC level of command abstraction.

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

1 files changed, 238 insertions, 0 deletions

diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
new file mode 100644
index 0000000..e8477fb
--- /dev/null
+++ b/drivers/dfu/dfu.c
@@ -0,0 +1,238 @@
+/*
+ * dfu.c -- DFU back-end routines
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * author: Lukasz Majewski <l.majewski@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 <mmc.h>
+#include <fat.h>
+#include <dfu.h>
+#include <linux/list.h>
+#include <linux/compiler.h>
+
+static LIST_HEAD(dfu_list);
+static int dfu_alt_num;
+
+static int dfu_find_alt_num(const char *s)
+{
+	int i = 0;
+
+	for (; *s; s++)
+		if (*s == ';')
+			i++;
+
+	return ++i;
+}
+
+static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
+				     dfu_buf[DFU_DATA_BUF_SIZE];
+
+int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
+{
+	static unsigned char *i_buf;
+	static int i_blk_seq_num;
+	long w_size = 0;
+	int ret = 0;
+
+	debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
+	       __func__, dfu->name, buf, size, blk_seq_num, i_buf);
+
+	if (blk_seq_num == 0) {
+		i_buf = dfu_buf;
+		i_blk_seq_num = 0;
+	}
+
+	if (i_blk_seq_num++ != blk_seq_num) {
+		printf("%s: Wrong sequence number! [%d] [%d]\n",
+		       __func__, i_blk_seq_num, blk_seq_num);
+		return -1;
+	}
+
+	memcpy(i_buf, buf, size);
+	i_buf += size;
+
+	if (size == 0) {
+		/* Integrity check (if needed) */
+		debug("%s: %s %d [B] CRC32: 0x%x\n", __func__, dfu->name,
+		       i_buf - dfu_buf, crc32(0, dfu_buf, i_buf - dfu_buf));
+
+		w_size = i_buf - dfu_buf;
+		ret = dfu->write_medium(dfu, dfu_buf, &w_size);
+		if (ret)
+			debug("%s: Write error!\n", __func__);
+
+		i_blk_seq_num = 0;
+		i_buf = NULL;
+		return ret;
+	}
+
+	return ret;
+}
+
+int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
+{
+	static unsigned char *i_buf;
+	static int i_blk_seq_num;
+	static long r_size;
+	static u32 crc;
+	int ret = 0;
+
+	debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
+	       __func__, dfu->name, buf, size, blk_seq_num, i_buf);
+
+	if (blk_seq_num == 0) {
+		i_buf = dfu_buf;
+		ret = dfu->read_medium(dfu, i_buf, &r_size);
+		debug("%s: %s %ld [B]\n", __func__, dfu->name, r_size);
+		i_blk_seq_num = 0;
+		/* Integrity check (if needed) */
+		crc = crc32(0, dfu_buf, r_size);
+	}
+
+	if (i_blk_seq_num++ != blk_seq_num) {
+		printf("%s: Wrong sequence number! [%d] [%d]\n",
+		       __func__, i_blk_seq_num, blk_seq_num);
+		return -1;
+	}
+
+	if (r_size >= size) {
+		memcpy(buf, i_buf, size);
+		i_buf += size;
+		r_size -= size;
+		return size;
+	} else {
+		memcpy(buf, i_buf, r_size);
+		i_buf += r_size;
+		debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name, crc);
+		puts("UPLOAD ... done\nCtrl+C to exit ...\n");
+
+		i_buf = NULL;
+		i_blk_seq_num = 0;
+		crc = 0;
+		return r_size;
+	}
+	return ret;
+}
+
+static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
+			    char *interface, int num)
+{
+	char *st;
+
+	debug("%s: %s interface: %s num: %d\n", __func__, s, interface, num);
+	st = strsep(&s, " ");
+	strcpy(dfu->name, st);
+
+	dfu->dev_num = num;
+	dfu->alt = alt;
+
+	/* Specific for mmc device */
+	if (strcmp(interface, "mmc") == 0) {
+		if (dfu_fill_entity_mmc(dfu, s))
+			return -1;
+	} else {
+		printf("%s: Device %s not (yet) supported!\n",
+		       __func__,  interface);
+		return -1;
+	}
+
+	return 0;
+}
+
+void dfu_free_entities(void)
+{
+	struct dfu_entity *dfu, *p, *t = NULL;
+
+	list_for_each_entry_safe_reverse(dfu, p, &dfu_list, list) {
+		list_del(&dfu->list);
+		t = dfu;
+	}
+	if (t)
+		free(t);
+	INIT_LIST_HEAD(&dfu_list);
+}
+
+int dfu_config_entities(char *env, char *interface, int num)
+{
+	struct dfu_entity *dfu;
+	int i, ret;
+	char *s;
+
+	dfu_alt_num = dfu_find_alt_num(env);
+	debug("%s: dfu_alt_num=%d\n", __func__, dfu_alt_num);
+
+	dfu = calloc(sizeof(*dfu), dfu_alt_num);
+	if (!dfu)
+		return -1;
+	for (i = 0; i < dfu_alt_num; i++) {
+
+		s = strsep(&env, ";");
+		ret = dfu_fill_entity(&dfu[i], s, i, interface, num);
+		if (ret)
+			return -1;
+
+		list_add_tail(&dfu[i].list, &dfu_list);
+	}
+
+	return 0;
+}
+
+const char *dfu_get_dev_type(enum dfu_device_type t)
+{
+	const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND" };
+	return dev_t[t];
+}
+
+const char *dfu_get_layout(enum dfu_layout l)
+{
+	const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
+					   "EXT3", "EXT4" };
+	return dfu_layout[l];
+}
+
+void dfu_show_entities(void)
+{
+	struct dfu_entity *dfu;
+
+	puts("DFU alt settings list:\n");
+
+	list_for_each_entry(dfu, &dfu_list, list) {
+		printf("dev: %s alt: %d name: %s layout: %s\n",
+		       dfu_get_dev_type(dfu->dev_type), dfu->alt,
+		       dfu->name, dfu_get_layout(dfu->layout));
+	}
+}
+
+int dfu_get_alt_number(void)
+{
+	return dfu_alt_num;
+}
+
+struct dfu_entity *dfu_get_entity(int alt)
+{
+	struct dfu_entity *dfu;
+
+	list_for_each_entry(dfu, &dfu_list, list) {
+		if (dfu->alt == alt)
+			return dfu;
+	}
+
+	return NULL;
+}