/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define min(a, b) \
({ typeof(a) _a = (a); typeof(b) _b = (b); (_a < _b) ? _a : _b; })
#define round_down(a, b) \
({ typeof(a) _a = (a); typeof(b) _b = (b); _a - (_a % _b); })
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sparse/sparse.h>
#include "fastboot.h"
static char ERROR[128];
char *fb_get_error(void)
{
return ERROR;
}
static int check_response(usb_handle *usb, unsigned int size, char *response)
{
unsigned char status[65];
int r;
for(;;) {
r = usb_read(usb, status, 64);
if(r < 0) {
sprintf(ERROR, "status read failed (%s)", strerror(errno));
usb_close(usb);
return -1;
}
status[r] = 0;
if(r < 4) {
sprintf(ERROR, "status malformed (%d bytes)", r);
usb_close(usb);
return -1;
}
if(!memcmp(status, "INFO", 4)) {
fprintf(stderr,"(bootloader) %s\n", status + 4);
continue;
}
if(!memcmp(status, "OKAY", 4)) {
if(response) {
strcpy(response, (char*) status + 4);
}
return 0;
}
if(!memcmp(status, "FAIL", 4)) {
if(r > 4) {
sprintf(ERROR, "remote: %s", status + 4);
} else {
strcpy(ERROR, "remote failure");
}
return -1;
}
if(!memcmp(status, "DATA", 4) && size > 0){
unsigned dsize = strtoul((char*) status + 4, 0, 16);
if(dsize > size) {
strcpy(ERROR, "data size too large");
usb_close(usb);
return -1;
}
return dsize;
}
strcpy(ERROR,"unknown status code");
usb_close(usb);
break;
}
return -1;
}
static int _command_start(usb_handle *usb, const char *cmd, unsigned size,
char *response)
{
int cmdsize = strlen(cmd);
if(response) {
response[0] = 0;
}
if(cmdsize > 64) {
sprintf(ERROR,"command too large");
return -1;
}
if(usb_write(usb, cmd, cmdsize) != cmdsize) {
sprintf(ERROR,"command write failed (%s)", strerror(errno));
usb_close(usb);
return -1;
}
return check_response(usb, size, response);
}
static int _command_data(usb_handle *usb, const void *data, unsigned size)
{
int r;
r = usb_write(usb, data, size);
if(r < 0) {
sprintf(ERROR, "data transfer failure (%s)", strerror(errno));
usb_close(usb);
return -1;
}
if(r != ((int) size)) {
sprintf(ERROR, "data transfer failure (short transfer)");
usb_close(usb);
return -1;
}
return r;
}
static int _command_end(usb_handle *usb)
{
int r;
r = check_response(usb, 0, 0);
if(r < 0) {
return -1;
}
return 0;
}
static int _command_send(usb_handle *usb, const char *cmd,
const void *data, unsigned size,
char *response)
{
int r;
if (size == 0) {
return -1;
}
r = _command_start(usb, cmd, size, response);
if (r < 0) {
return -1;
}
r = _command_data(usb, data, size);
if (r < 0) {
return -1;
}
r = _command_end(usb);
if(r < 0) {
return -1;
}
return size;
}
static int _command_send_no_data(usb_handle *usb, const char *cmd,
char *response)
{
return _command_start(usb, cmd, 0, response);
}
int fb_command(usb_handle *usb, const char *cmd)
{
return _command_send_no_data(usb, cmd, 0);
}
int fb_command_response(usb_handle *usb, const char *cmd, char *response)
{
return _command_send_no_data(usb, cmd, response);
}
int fb_download_data(usb_handle *usb, const void *data, unsigned size)
{
char cmd[64];
int r;
sprintf(cmd, "download:%08x", size);
r = _command_send(usb, cmd, data, size, 0);
if(r < 0) {
return -1;
} else {
return 0;
}
}
#define USB_BUF_SIZE 512
static char usb_buf[USB_BUF_SIZE];
static int usb_buf_len;
static int fb_download_data_sparse_write(void *priv, const void *data, int len)
{
int r;
usb_handle *usb = priv;
int to_write;
const char *ptr = data;
if (usb_buf_len) {
to_write = min(USB_BUF_SIZE - usb_buf_len, len);
memcpy(usb_buf + usb_buf_len, ptr, to_write);
usb_buf_len += to_write;
ptr += to_write;
len -= to_write;
}
if (usb_buf_len == USB_BUF_SIZE) {
r = _command_data(usb, usb_buf, USB_BUF_SIZE);
if (r != USB_BUF_SIZE) {
return -1;
}
usb_buf_len = 0;
}
if (len > USB_BUF_SIZE) {
if (usb_buf_len > 0) {
sprintf(ERROR, "internal error: usb_buf not empty\n");
return -1;
}
to_write = round_down(len, USB_BUF_SIZE);
r = _command_data(usb, ptr, to_write);
if (r != to_write) {
return -1;
}
ptr += to_write;
len -= to_write;
}
if (len > 0) {
if (len > USB_BUF_SIZE) {
sprintf(ERROR, "internal error: too much left for usb_buf\n");
return -1;
}
memcpy(usb_buf, ptr, len);
usb_buf_len = len;
}
return 0;
}
static int fb_download_data_sparse_flush(usb_handle *usb)
{
int r;
if (usb_buf_len > 0) {
r = _command_data(usb, usb_buf, usb_buf_len);
if (r != usb_buf_len) {
return -1;
}
usb_buf_len = 0;
}
return 0;
}
int fb_download_data_sparse(usb_handle *usb, struct sparse_file *s)
{
char cmd[64];
int r;
int size = sparse_file_len(s, true, false);
if (size <= 0) {
return -1;
}
sprintf(cmd, "download:%08x", size);
r = _command_start(usb, cmd, size, 0);
if (r < 0) {
return -1;
}
r = sparse_file_callback(s, true, false, fb_download_data_sparse_write, usb);
if (r < 0) {
return -1;
}
fb_download_data_sparse_flush(usb);
return _command_end(usb);
}