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dfu: make data buffer size configurable 

Dfu transfer uses a buffer before writing data to the
raw storage device. Make the size (in bytes) of this buffer
configurable through environment variable "dfu_bufsiz".
Defaut value is configurable through CONFIG_SYS_DFU_DATA_BUF_SIZE

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Cc: Tom Rini <trini@ti.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Tom Rini <trini@ti.com>
This commit is contained in:
Heiko Schocher 2013-06-12 06:05:51 +02:00 committed by Marek Vasut
parent e6bf18dba2
commit e7e75c70c5
3 changed files with 50 additions and 9 deletions
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6
README
View File

@ -1392,6 +1392,12 @@ The following options need to be configured:
CONFIG_DFU_NAND
This enables support for exposing NAND devices via DFU.
CONFIG_SYS_DFU_DATA_BUF_SIZE
Dfu transfer uses a buffer before writing data to the
raw storage device. Make the size (in bytes) of this buffer
configurable. The size of this buffer is also configurable
through the "dfu_bufsiz" environment variable.
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

49
drivers/dfu/dfu.c
View File

@ -20,6 +20,7 @@
*/
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <mmc.h>
#include <fat.h>
@ -41,8 +42,34 @@ static int dfu_find_alt_num(const char *s)
return ++i;
}
static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
dfu_buf[DFU_DATA_BUF_SIZE];
static unsigned char *dfu_buf;
static unsigned long dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
static unsigned char *dfu_free_buf(void)
{
free(dfu_buf);
dfu_buf = NULL;
return dfu_buf;
}
static unsigned char *dfu_get_buf(void)
{
char *s;
if (dfu_buf != NULL)
return dfu_buf;
s = getenv("dfu_bufsiz");
dfu_buf_size = s ? (unsigned long)simple_strtol(s, NULL, 16) :
CONFIG_SYS_DFU_DATA_BUF_SIZE;
dfu_buf = memalign(CONFIG_SYS_CACHELINE_SIZE, dfu_buf_size);
if (dfu_buf == NULL)
printf("%s: Could not memalign 0x%lx bytes\n",
__func__, dfu_buf_size);
return dfu_buf;
}
static int dfu_write_buffer_drain(struct dfu_entity *dfu)
{
@ -87,8 +114,10 @@ int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
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);
dfu->i_buf_start = dfu_get_buf();
if (dfu->i_buf_start == NULL)
return -ENOMEM;
dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
dfu->i_buf = dfu->i_buf_start;
dfu->inited = 1;
@ -148,11 +177,12 @@ int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
printf("\nDFU complete CRC32: 0x%08x\n", dfu->crc);
/* clear everything */
dfu_free_buf();
dfu->crc = 0;
dfu->offset = 0;
dfu->i_blk_seq_num = 0;
dfu->i_buf_start = dfu_buf;
dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
dfu->i_buf_end = dfu_buf;
dfu->i_buf = dfu->i_buf_start;
dfu->inited = 0;
@ -229,8 +259,10 @@ int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
dfu->i_blk_seq_num = 0;
dfu->crc = 0;
dfu->offset = 0;
dfu->i_buf_start = dfu_buf;
dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
dfu->i_buf_start = dfu_get_buf();
if (dfu->i_buf_start == NULL)
return -ENOMEM;
dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = 0;
@ -257,11 +289,12 @@ int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name, dfu->crc);
puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
dfu_free_buf();
dfu->i_blk_seq_num = 0;
dfu->crc = 0;
dfu->offset = 0;
dfu->i_buf_start = dfu_buf;
dfu->i_buf_end = dfu_buf + sizeof(dfu_buf);
dfu->i_buf_end = dfu_buf;
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = 0;

4
include/dfu.h
View File

@ -68,7 +68,9 @@ static inline unsigned int get_mmc_blk_size(int dev)
#define DFU_NAME_SIZE 32
#define DFU_CMD_BUF_SIZE 128
#define DFU_DATA_BUF_SIZE (1024*1024*8) /* 8 MiB */
#ifndef CONFIG_SYS_DFU_DATA_BUF_SIZE
#define CONFIG_SYS_DFU_DATA_BUF_SIZE (1024*1024*8) /* 8 MiB */
#endif
#ifndef CONFIG_SYS_DFU_MAX_FILE_SIZE
#define CONFIG_SYS_DFU_MAX_FILE_SIZE (4 << 20) /* 4 MiB */
#endif