diff options
Diffstat (limited to 'mtdutils/rk30hack.c')
-rw-r--r-- | mtdutils/rk30hack.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/mtdutils/rk30hack.c b/mtdutils/rk30hack.c deleted file mode 100644 index e9351b52e..000000000 --- a/mtdutils/rk30hack.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Copyright (c) 2013, Sergey 'Jin' Bostandzhyan - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* This is a hack for Rockchip rk30xx based devices. The problem is that - * the MEMERASE ioctl is failing (hangs and never returns) in their kernel. - * The sources are not fully available, so fixing it in the rk30xxnand_ko driver - * is not possible. - * - * I straced the stock recovery application and it seems to avoid this - * particular ioctl, instead it is simply writing zeroes using the write() call. - * - * This workaround does the same and will replace all MEMERASE occurances in - * the recovery code. - */ - -#include <sys/types.h> -#include <unistd.h> -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> - -#include "rk30hack.h" - -int rk30_zero_out(int fd, off_t pos, ssize_t size) -{ - if (lseek(fd, pos, SEEK_SET) != pos) { - fprintf(stderr, "mtd: erase failure at 0x%08lx (%s)\n", - pos, strerror(errno)); - return -1; - } - - unsigned char *zb = (unsigned char *)calloc(1, size); - if (zb == NULL) { - fprintf(stderr, "mtd: erase failure, could not allocate memory\n"); - return -1; - } - - if (write(fd, zb, size) != size) { - fprintf(stderr, "mtd: erase failure at 0x%08lx (%s)\n", - pos, strerror(errno)); - free(zb); - return -1; - } - - free(zb); - return 0; -} |