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dfu: NAND specific routines for DFU operation 

Support for NAND storage devices to work with the DFU framework.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Tom Rini <trini@ti.com>
Acked-by: Scott Wood <scottwood@freescale.com>
utp
Pantelis Antoniou 2013-03-14 05:32:52 +00:00 committed by Marek Vasut
parent c4df2f4100
commit c6631764c2
5 changed files with 222 additions and 0 deletions
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3
README
View File

@ -1357,6 +1357,9 @@ The following options need to be configured:
CONFIG_DFU_MMC
This enables support for exposing (e)MMC devices via DFU.
CONFIG_DFU_NAND
This enables support for exposing NAND devices via DFU.
CONFIG_SYS_DFU_MAX_FILE_SIZE
When updating files rather than the raw storage device,
we use a static buffer to copy the file into and then write

1
drivers/dfu/Makefile
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@ -27,6 +27,7 @@ LIB = $(obj)libdfu.o
COBJS-$(CONFIG_DFU_FUNCTION) += dfu.o
COBJS-$(CONFIG_DFU_MMC) += dfu_mmc.o
COBJS-$(CONFIG_DFU_NAND) += dfu_nand.o
SRCS := $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS-y))

8
drivers/dfu/dfu.c
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@ -85,6 +85,7 @@ int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
/* initial state */
dfu->crc = 0;
dfu->offset = 0;
dfu->bad_skip = 0;
dfu->i_blk_seq_num = 0;
dfu->i_buf_start = dfu_buf;
dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
@ -233,6 +234,8 @@ int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = 0;
dfu->bad_skip = 0;
dfu->inited = 1;
}
@ -262,6 +265,8 @@ int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = 0;
dfu->bad_skip = 0;
dfu->inited = 0;
}
@ -284,6 +289,9 @@ static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
if (strcmp(interface, "mmc") == 0) {
if (dfu_fill_entity_mmc(dfu, s))
return -1;
} else if (strcmp(interface, "nand") == 0) {
if (dfu_fill_entity_nand(dfu, s))
return -1;
} else {
printf("%s: Device %s not (yet) supported!\n",
__func__, interface);

187
drivers/dfu/dfu_nand.c 100644
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@ -0,0 +1,187 @@
/*
* dfu_nand.c -- DFU for NAND routines.
*
* Copyright (C) 2012-2013 Texas Instruments, Inc.
*
* Based on dfu_mmc.c which is:
* 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 <errno.h>
#include <div64.h>
#include <dfu.h>
#include <linux/mtd/mtd.h>
#include <jffs2/load_kernel.h>
#include <nand.h>
enum dfu_nand_op {
DFU_OP_READ = 1,
DFU_OP_WRITE,
};
static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
loff_t start, lim;
size_t count, actual;
int ret;
nand_info_t *nand;
/* if buf == NULL return total size of the area */
if (buf == NULL) {
*len = dfu->data.nand.size;
return 0;
}
start = dfu->data.nand.start + offset + dfu->bad_skip;
lim = dfu->data.nand.start + dfu->data.nand.size - start;
count = *len;
if (nand_curr_device < 0 ||
nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
!nand_info[nand_curr_device].name) {
printf("%s: invalid nand device\n", __func__);
return -1;
}
nand = &nand_info[nand_curr_device];
if (op == DFU_OP_READ)
ret = nand_read_skip_bad(nand, start, &count, &actual,
lim, buf);
else
ret = nand_write_skip_bad(nand, start, &count, &actual,
lim, buf, 0);
if (ret != 0) {
printf("%s: nand_%s_skip_bad call failed at %llx!\n",
__func__, op == DFU_OP_READ ? "read" : "write",
start);
return ret;
}
/*
* Find out where we stopped writing data. This can be deeper into
* the NAND than we expected due to having to skip bad blocks. So
* we must take this into account for the next write, if any.
*/
if (actual > count)
dfu->bad_skip += actual - count;
return ret;
}
static inline int nand_block_write(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
}
static inline int nand_block_read(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
}
static int dfu_write_medium_nand(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = nand_block_write(dfu, offset, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
long *len)
{
int ret = -1;
switch (dfu->layout) {
case DFU_RAW_ADDR:
ret = nand_block_read(dfu, offset, buf, len);
break;
default:
printf("%s: Layout (%s) not (yet) supported!\n", __func__,
dfu_get_layout(dfu->layout));
}
return ret;
}
int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s)
{
char *st;
int ret, dev, part;
dfu->dev_type = DFU_DEV_NAND;
st = strsep(&s, " ");
if (!strcmp(st, "raw")) {
dfu->layout = DFU_RAW_ADDR;
dfu->data.nand.start = simple_strtoul(s, &s, 16);
s++;
dfu->data.nand.size = simple_strtoul(s, &s, 16);
} else if (!strcmp(st, "part")) {
char mtd_id[32];
struct mtd_device *mtd_dev;
u8 part_num;
struct part_info *pi;
dfu->layout = DFU_RAW_ADDR;
dev = simple_strtoul(s, &s, 10);
s++;
part = simple_strtoul(s, &s, 10);
sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
printf("using id '%s'\n", mtd_id);
mtdparts_init();
ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
if (ret != 0) {
printf("Could not locate '%s'\n", mtd_id);
return -1;
}
dfu->data.nand.start = pi->offset;
dfu->data.nand.size = pi->size;
} else {
printf("%s: Memory layout (%s) not supported!\n", __func__, st);
return -1;
}
dfu->read_medium = dfu_read_medium_nand;
dfu->write_medium = dfu_write_medium_nand;
/* initial state */
dfu->inited = 0;
return 0;
}

23
include/dfu.h
View File

@ -52,6 +52,15 @@ struct mmc_internal_data {
unsigned int part;
};
struct nand_internal_data {
/* RAW programming */
u64 start;
u64 size;
unsigned int dev;
unsigned int part;
};
static inline unsigned int get_mmc_blk_size(int dev)
{
return find_mmc_device(dev)->read_bl_len;
@ -74,6 +83,7 @@ struct dfu_entity {
union {
struct mmc_internal_data mmc;
struct nand_internal_data nand;
} data;
int (*read_medium)(struct dfu_entity *dfu,
@ -96,6 +106,8 @@ struct dfu_entity {
long r_left;
long b_left;
u32 bad_skip; /* for nand use */
unsigned int inited:1;
};
@ -120,4 +132,15 @@ static inline int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s)
return -1;
}
#endif
#ifdef CONFIG_DFU_NAND
extern int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s);
#else
static inline int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s)
{
puts("NAND support not available!\n");
return -1;
}
#endif
#endif /* __DFU_ENTITY_H_ */