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![Lukasz Majewski](/assets/img/avatar_default.png)
Patch (SHA1: bd694244db
)
dfu: Introduction of the "dfu_hash_algo" env variable for checksum method
setting
already introduced more generic handling of the crc32 calculation.
Up till now the CRC32 of received data was calculated unconditionally.
This patch changes this and from now - by default the crc32 is NOT
calculated anymore.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
507 lines
10 KiB
C
507 lines
10 KiB
C
/*
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* dfu.c -- DFU back-end routines
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*
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* Copyright (C) 2012 Samsung Electronics
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* author: Lukasz Majewski <l.majewski@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <malloc.h>
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#include <mmc.h>
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#include <fat.h>
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#include <dfu.h>
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#include <hash.h>
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#include <linux/list.h>
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#include <linux/compiler.h>
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static bool dfu_reset_request;
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static LIST_HEAD(dfu_list);
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static int dfu_alt_num;
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static int alt_num_cnt;
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static struct hash_algo *dfu_hash_algo;
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bool dfu_reset(void)
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{
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return dfu_reset_request;
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}
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void dfu_trigger_reset()
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{
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dfu_reset_request = true;
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}
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static int dfu_find_alt_num(const char *s)
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{
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int i = 0;
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for (; *s; s++)
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if (*s == ';')
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i++;
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return ++i;
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}
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int dfu_init_env_entities(char *interface, int dev)
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{
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const char *str_env;
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char *env_bkp;
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int ret;
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str_env = getenv("dfu_alt_info");
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if (!str_env) {
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error("\"dfu_alt_info\" env variable not defined!\n");
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return -EINVAL;
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}
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env_bkp = strdup(str_env);
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ret = dfu_config_entities(env_bkp, interface, dev);
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if (ret) {
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error("DFU entities configuration failed!\n");
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return ret;
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}
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free(env_bkp);
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return 0;
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}
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static unsigned char *dfu_buf;
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static unsigned long dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
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unsigned char *dfu_free_buf(void)
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{
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free(dfu_buf);
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dfu_buf = NULL;
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return dfu_buf;
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}
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unsigned long dfu_get_buf_size(void)
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{
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return dfu_buf_size;
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}
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unsigned char *dfu_get_buf(void)
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{
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char *s;
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if (dfu_buf != NULL)
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return dfu_buf;
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s = getenv("dfu_bufsiz");
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dfu_buf_size = s ? (unsigned long)simple_strtol(s, NULL, 16) :
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CONFIG_SYS_DFU_DATA_BUF_SIZE;
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dfu_buf = memalign(CONFIG_SYS_CACHELINE_SIZE, dfu_buf_size);
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if (dfu_buf == NULL)
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printf("%s: Could not memalign 0x%lx bytes\n",
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__func__, dfu_buf_size);
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return dfu_buf;
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}
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static char *dfu_get_hash_algo(void)
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{
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char *s;
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s = getenv("dfu_hash_algo");
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if (!s)
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return NULL;
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if (!strcmp(s, "crc32")) {
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debug("%s: DFU hash method: %s\n", __func__, s);
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return s;
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}
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error("DFU hash method: %s not supported!\n", s);
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return NULL;
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}
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static int dfu_write_buffer_drain(struct dfu_entity *dfu)
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{
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long w_size;
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int ret;
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/* flush size? */
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w_size = dfu->i_buf - dfu->i_buf_start;
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if (w_size == 0)
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return 0;
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if (dfu_hash_algo)
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dfu_hash_algo->hash_update(dfu_hash_algo, &dfu->crc,
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dfu->i_buf_start, w_size, 0);
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ret = dfu->write_medium(dfu, dfu->offset, dfu->i_buf_start, &w_size);
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if (ret)
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debug("%s: Write error!\n", __func__);
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/* point back */
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dfu->i_buf = dfu->i_buf_start;
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/* update offset */
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dfu->offset += w_size;
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puts("#");
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return ret;
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}
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int dfu_flush(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
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{
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int ret = 0;
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ret = dfu_write_buffer_drain(dfu);
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if (ret)
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return ret;
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if (dfu->flush_medium)
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ret = dfu->flush_medium(dfu);
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if (dfu_hash_algo)
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printf("\nDFU complete %s: 0x%08x\n", dfu_hash_algo->name,
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dfu->crc);
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/* clear everything */
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dfu_free_buf();
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dfu->crc = 0;
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dfu->offset = 0;
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dfu->i_blk_seq_num = 0;
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dfu->i_buf_start = dfu_buf;
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dfu->i_buf_end = dfu_buf;
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dfu->i_buf = dfu->i_buf_start;
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dfu->inited = 0;
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return ret;
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}
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int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
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{
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int ret = 0;
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int tret;
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debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x offset: 0x%llx bufoffset: 0x%x\n",
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__func__, dfu->name, buf, size, blk_seq_num, dfu->offset,
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dfu->i_buf - dfu->i_buf_start);
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if (!dfu->inited) {
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/* initial state */
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dfu->crc = 0;
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dfu->offset = 0;
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dfu->bad_skip = 0;
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dfu->i_blk_seq_num = 0;
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dfu->i_buf_start = dfu_get_buf();
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if (dfu->i_buf_start == NULL)
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return -ENOMEM;
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dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
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dfu->i_buf = dfu->i_buf_start;
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dfu->inited = 1;
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}
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if (dfu->i_blk_seq_num != blk_seq_num) {
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printf("%s: Wrong sequence number! [%d] [%d]\n",
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__func__, dfu->i_blk_seq_num, blk_seq_num);
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return -1;
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}
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/* DFU 1.1 standard says:
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* The wBlockNum field is a block sequence number. It increments each
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* time a block is transferred, wrapping to zero from 65,535. It is used
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* to provide useful context to the DFU loader in the device."
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*
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* This means that it's a 16 bit counter that roll-overs at
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* 0xffff -> 0x0000. By having a typical 4K transfer block
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* we roll-over at exactly 256MB. Not very fun to debug.
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*
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* Handling rollover, and having an inited variable,
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* makes things work.
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*/
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/* handle rollover */
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dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
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/* flush buffer if overflow */
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if ((dfu->i_buf + size) > dfu->i_buf_end) {
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tret = dfu_write_buffer_drain(dfu);
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if (ret == 0)
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ret = tret;
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}
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/* we should be in buffer now (if not then size too large) */
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if ((dfu->i_buf + size) > dfu->i_buf_end) {
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error("Buffer overflow! (0x%p + 0x%x > 0x%p)\n", dfu->i_buf,
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size, dfu->i_buf_end);
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return -1;
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}
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memcpy(dfu->i_buf, buf, size);
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dfu->i_buf += size;
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/* if end or if buffer full flush */
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if (size == 0 || (dfu->i_buf + size) > dfu->i_buf_end) {
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tret = dfu_write_buffer_drain(dfu);
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if (ret == 0)
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ret = tret;
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}
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return ret;
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}
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static int dfu_read_buffer_fill(struct dfu_entity *dfu, void *buf, int size)
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{
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long chunk;
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int ret, readn;
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readn = 0;
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while (size > 0) {
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/* get chunk that can be read */
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chunk = min(size, dfu->b_left);
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/* consume */
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if (chunk > 0) {
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memcpy(buf, dfu->i_buf, chunk);
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if (dfu_hash_algo)
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dfu_hash_algo->hash_update(dfu_hash_algo,
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&dfu->crc, buf,
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chunk, 0);
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dfu->i_buf += chunk;
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dfu->b_left -= chunk;
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dfu->r_left -= chunk;
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size -= chunk;
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buf += chunk;
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readn += chunk;
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}
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/* all done */
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if (size > 0) {
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/* no more to read */
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if (dfu->r_left == 0)
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break;
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dfu->i_buf = dfu->i_buf_start;
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dfu->b_left = dfu->i_buf_end - dfu->i_buf_start;
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/* got to read, but buffer is empty */
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if (dfu->b_left > dfu->r_left)
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dfu->b_left = dfu->r_left;
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ret = dfu->read_medium(dfu, dfu->offset, dfu->i_buf,
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&dfu->b_left);
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if (ret != 0) {
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debug("%s: Read error!\n", __func__);
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return ret;
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}
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dfu->offset += dfu->b_left;
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dfu->r_left -= dfu->b_left;
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puts("#");
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}
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}
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return readn;
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}
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int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
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{
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int ret = 0;
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debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
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__func__, dfu->name, buf, size, blk_seq_num, dfu->i_buf);
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if (!dfu->inited) {
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dfu->i_buf_start = dfu_get_buf();
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if (dfu->i_buf_start == NULL)
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return -ENOMEM;
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ret = dfu->read_medium(dfu, 0, dfu->i_buf_start, &dfu->r_left);
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if (ret != 0) {
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debug("%s: failed to get r_left\n", __func__);
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return ret;
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}
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debug("%s: %s %ld [B]\n", __func__, dfu->name, dfu->r_left);
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dfu->i_blk_seq_num = 0;
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dfu->crc = 0;
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dfu->offset = 0;
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dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
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dfu->i_buf = dfu->i_buf_start;
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dfu->b_left = min(dfu_buf_size, dfu->r_left);
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dfu->bad_skip = 0;
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dfu->inited = 1;
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}
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if (dfu->i_blk_seq_num != blk_seq_num) {
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printf("%s: Wrong sequence number! [%d] [%d]\n",
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__func__, dfu->i_blk_seq_num, blk_seq_num);
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return -1;
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}
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/* handle rollover */
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dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
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ret = dfu_read_buffer_fill(dfu, buf, size);
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if (ret < 0) {
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printf("%s: Failed to fill buffer\n", __func__);
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return -1;
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}
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if (ret < size) {
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if (dfu_hash_algo)
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debug("%s: %s %s: 0x%x\n", __func__, dfu->name,
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dfu_hash_algo->name, dfu->crc);
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puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
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dfu_free_buf();
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dfu->i_blk_seq_num = 0;
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dfu->crc = 0;
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dfu->offset = 0;
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dfu->i_buf_start = dfu_buf;
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dfu->i_buf_end = dfu_buf;
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dfu->i_buf = dfu->i_buf_start;
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dfu->b_left = 0;
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dfu->bad_skip = 0;
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dfu->inited = 0;
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}
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return ret;
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}
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static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
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char *interface, int num)
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{
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char *st;
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debug("%s: %s interface: %s num: %d\n", __func__, s, interface, num);
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st = strsep(&s, " ");
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strcpy(dfu->name, st);
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dfu->dev_num = num;
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dfu->alt = alt;
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/* Specific for mmc device */
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if (strcmp(interface, "mmc") == 0) {
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if (dfu_fill_entity_mmc(dfu, s))
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return -1;
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} else if (strcmp(interface, "nand") == 0) {
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if (dfu_fill_entity_nand(dfu, s))
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return -1;
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} else if (strcmp(interface, "ram") == 0) {
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if (dfu_fill_entity_ram(dfu, s))
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return -1;
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} else {
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printf("%s: Device %s not (yet) supported!\n",
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__func__, interface);
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return -1;
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}
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return 0;
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}
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void dfu_free_entities(void)
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{
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struct dfu_entity *dfu, *p, *t = NULL;
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list_for_each_entry_safe_reverse(dfu, p, &dfu_list, list) {
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list_del(&dfu->list);
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t = dfu;
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}
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if (t)
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free(t);
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INIT_LIST_HEAD(&dfu_list);
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alt_num_cnt = 0;
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}
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int dfu_config_entities(char *env, char *interface, int num)
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{
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struct dfu_entity *dfu;
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int i, ret;
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char *s;
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dfu_alt_num = dfu_find_alt_num(env);
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debug("%s: dfu_alt_num=%d\n", __func__, dfu_alt_num);
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dfu_hash_algo = NULL;
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s = dfu_get_hash_algo();
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if (s) {
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ret = hash_lookup_algo(s, &dfu_hash_algo);
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if (ret)
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error("Hash algorithm %s not supported\n", s);
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}
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dfu = calloc(sizeof(*dfu), dfu_alt_num);
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if (!dfu)
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return -1;
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for (i = 0; i < dfu_alt_num; i++) {
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s = strsep(&env, ";");
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ret = dfu_fill_entity(&dfu[i], s, alt_num_cnt, interface, num);
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if (ret)
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return -1;
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list_add_tail(&dfu[i].list, &dfu_list);
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alt_num_cnt++;
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}
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return 0;
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}
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const char *dfu_get_dev_type(enum dfu_device_type t)
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{
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const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM" };
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return dev_t[t];
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}
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const char *dfu_get_layout(enum dfu_layout l)
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{
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const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
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"EXT3", "EXT4", "RAM_ADDR" };
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return dfu_layout[l];
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}
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void dfu_show_entities(void)
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{
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struct dfu_entity *dfu;
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puts("DFU alt settings list:\n");
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list_for_each_entry(dfu, &dfu_list, list) {
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printf("dev: %s alt: %d name: %s layout: %s\n",
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dfu_get_dev_type(dfu->dev_type), dfu->alt,
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dfu->name, dfu_get_layout(dfu->layout));
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}
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}
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int dfu_get_alt_number(void)
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{
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return dfu_alt_num;
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}
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struct dfu_entity *dfu_get_entity(int alt)
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{
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struct dfu_entity *dfu;
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list_for_each_entry(dfu, &dfu_list, list) {
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if (dfu->alt == alt)
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return dfu;
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}
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return NULL;
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}
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int dfu_get_alt(char *name)
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{
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struct dfu_entity *dfu;
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list_for_each_entry(dfu, &dfu_list, list) {
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if (!strncmp(dfu->name, name, strlen(dfu->name)))
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return dfu->alt;
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}
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return -ENODEV;
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}
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