u-boot/drivers/dfu/dfu.c

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/*
* 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];
static int dfu_write_buffer_drain(struct dfu_entity *dfu)
{
long w_size;
int ret;
/* flush size? */
w_size = dfu->i_buf - dfu->i_buf_start;
if (w_size == 0)
return 0;
/* update CRC32 */
dfu->crc = crc32(dfu->crc, dfu->i_buf_start, w_size);
ret = dfu->write_medium(dfu, dfu->offset, dfu->i_buf_start, &w_size);
if (ret)
debug("%s: Write error!\n", __func__);
/* point back */
dfu->i_buf = dfu->i_buf_start;
/* update offset */
dfu->offset += w_size;
puts("#");
return ret;
}
int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
{
int ret = 0;
int tret;
debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x offset: 0x%llx bufoffset: 0x%x\n",
__func__, dfu->name, buf, size, blk_seq_num, dfu->offset,
dfu->i_buf - dfu->i_buf_start);
if (!dfu->inited) {
/* 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);
dfu->i_buf = dfu->i_buf_start;
dfu->inited = 1;
}
if (dfu->i_blk_seq_num != blk_seq_num) {
printf("%s: Wrong sequence number! [%d] [%d]\n",
__func__, dfu->i_blk_seq_num, blk_seq_num);
return -1;
}
/* DFU 1.1 standard says:
* The wBlockNum field is a block sequence number. It increments each
* time a block is transferred, wrapping to zero from 65,535. It is used
* to provide useful context to the DFU loader in the device."
*
* This means that it's a 16 bit counter that roll-overs at
* 0xffff -> 0x0000. By having a typical 4K transfer block
* we roll-over at exactly 256MB. Not very fun to debug.
*
* Handling rollover, and having an inited variable,
* makes things work.
*/
/* handle rollover */
dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
/* flush buffer if overflow */
if ((dfu->i_buf + size) > dfu->i_buf_end) {
tret = dfu_write_buffer_drain(dfu);
if (ret == 0)
ret = tret;
}
/* we should be in buffer now (if not then size too large) */
if ((dfu->i_buf + size) > dfu->i_buf_end) {
printf("%s: Wrong size! [%d] [%d] - %d\n",
__func__, dfu->i_blk_seq_num, blk_seq_num, size);
return -1;
}
memcpy(dfu->i_buf, buf, size);
dfu->i_buf += size;
/* if end or if buffer full flush */
if (size == 0 || (dfu->i_buf + size) > dfu->i_buf_end) {
tret = dfu_write_buffer_drain(dfu);
if (ret == 0)
ret = tret;
}
/* end? */
if (size == 0) {
/* Now try and flush to the medium if needed. */
if (dfu->flush_medium)
ret = dfu->flush_medium(dfu);
printf("\nDFU complete CRC32: 0x%08x\n", dfu->crc);
/* clear everything */
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 = dfu->i_buf_start;
dfu->inited = 0;
}
return ret = 0 ? size : ret;
}
static int dfu_read_buffer_fill(struct dfu_entity *dfu, void *buf, int size)
{
long chunk;
int ret, readn;
readn = 0;
while (size > 0) {
/* get chunk that can be read */
chunk = min(size, dfu->b_left);
/* consume */
if (chunk > 0) {
memcpy(buf, dfu->i_buf, chunk);
dfu->crc = crc32(dfu->crc, buf, chunk);
dfu->i_buf += chunk;
dfu->b_left -= chunk;
size -= chunk;
buf += chunk;
readn += chunk;
}
/* all done */
if (size > 0) {
/* no more to read */
if (dfu->r_left == 0)
break;
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = dfu->i_buf_end - dfu->i_buf_start;
/* got to read, but buffer is empty */
if (dfu->b_left > dfu->r_left)
dfu->b_left = dfu->r_left;
ret = dfu->read_medium(dfu, dfu->offset, dfu->i_buf,
&dfu->b_left);
if (ret != 0) {
debug("%s: Read error!\n", __func__);
return ret;
}
dfu->offset += dfu->b_left;
dfu->r_left -= dfu->b_left;
puts("#");
}
}
return readn;
}
int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
{
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, dfu->i_buf);
if (!dfu->inited) {
ret = dfu->read_medium(dfu, 0, buf, &dfu->r_left);
if (ret != 0) {
debug("%s: failed to get r_left\n", __func__);
return ret;
}
debug("%s: %s %ld [B]\n", __func__, dfu->name, dfu->r_left);
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 = dfu->i_buf_start;
dfu->b_left = 0;
dfu->bad_skip = 0;
dfu->inited = 1;
}
if (dfu->i_blk_seq_num != blk_seq_num) {
printf("%s: Wrong sequence number! [%d] [%d]\n",
__func__, dfu->i_blk_seq_num, blk_seq_num);
return -1;
}
/* handle rollover */
dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
ret = dfu_read_buffer_fill(dfu, buf, size);
if (ret < 0) {
printf("%s: Failed to fill buffer\n", __func__);
return -1;
}
if (ret < size) {
debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name, dfu->crc);
puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
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 = dfu->i_buf_start;
dfu->b_left = 0;
dfu->bad_skip = 0;
dfu->inited = 0;
}
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 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);
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;
}