u-boot/drivers/dfu/dfu.c
Bo Shen 31bae4c5d9 usb: dfu: correct dfu buffer inited value
After dfu buffer is initialized, the buffer should be all available,
while not 0. Initialize its value to min(dfu_buf_size, dfu->r_left).

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
2013-11-08 20:46:20 +01:00

455 lines
9.3 KiB
C

/*
* dfu.c -- DFU back-end routines
*
* Copyright (C) 2012 Samsung Electronics
* author: Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <mmc.h>
#include <fat.h>
#include <dfu.h>
#include <linux/list.h>
#include <linux/compiler.h>
static bool dfu_reset_request;
static LIST_HEAD(dfu_list);
static int dfu_alt_num;
bool dfu_reset(void)
{
return dfu_reset_request;
}
void dfu_trigger_reset()
{
dfu_reset_request = true;
}
static int dfu_find_alt_num(const char *s)
{
int i = 0;
for (; *s; s++)
if (*s == ';')
i++;
return ++i;
}
int dfu_init_env_entities(char *interface, int dev)
{
const char *str_env;
char *env_bkp;
int ret;
str_env = getenv("dfu_alt_info");
if (!str_env) {
error("\"dfu_alt_info\" env variable not defined!\n");
return -EINVAL;
}
env_bkp = strdup(str_env);
ret = dfu_config_entities(env_bkp, interface, dev);
if (ret) {
error("DFU entities configuration failed!\n");
return ret;
}
free(env_bkp);
return 0;
}
static unsigned char *dfu_buf;
static unsigned long dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
unsigned char *dfu_free_buf(void)
{
free(dfu_buf);
dfu_buf = NULL;
return dfu_buf;
}
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)
{
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_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;
}
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) {
error("Buffer overflow! (0x%p + 0x%x > 0x%p)\n", dfu->i_buf,
size, dfu->i_buf_end);
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_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;
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;
dfu->r_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) {
dfu->i_buf_start = dfu_get_buf();
if (dfu->i_buf_start == NULL)
return -ENOMEM;
ret = dfu->read_medium(dfu, 0, dfu->i_buf_start, &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_end = dfu_get_buf() + dfu_buf_size;
dfu->i_buf = dfu->i_buf_start;
dfu->b_left = min(dfu_buf_size, dfu->r_left);
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_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;
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 if (strcmp(interface, "ram") == 0) {
if (dfu_fill_entity_ram(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", "RAM" };
return dev_t[t];
}
const char *dfu_get_layout(enum dfu_layout l)
{
const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
"EXT3", "EXT4", "RAM_ADDR" };
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;
}
int dfu_get_alt(char *name)
{
struct dfu_entity *dfu;
list_for_each_entry(dfu, &dfu_list, list) {
if (!strncmp(dfu->name, name, strlen(dfu->name)))
return dfu->alt;
}
return -ENODEV;
}