496 lines
14 KiB
C
Executable File
496 lines
14 KiB
C
Executable File
/*
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* Copyright 2014 Broadcom Corporation.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <config.h>
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#include <common.h>
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#include <blk.h>
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#include <fastboot.h>
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#include <fb_mmc.h>
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#include <image-sparse.h>
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#include <part.h>
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#include <mmc.h>
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#include <div64.h>
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#include <linux/compat.h>
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#include <android_image.h>
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#ifdef CONFIG_RKIMG_BOOTLOADER
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#include <boot_rkimg.h>
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#endif
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/*
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* FIXME: Ensure we always set these names via Kconfig once xxx_PARTITION is
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* migrated
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*/
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#ifndef CONFIG_FASTBOOT_GPT_NAME
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#define CONFIG_FASTBOOT_GPT_NAME "gpt"
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#endif
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#ifndef CONFIG_FASTBOOT_MBR_NAME
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#define CONFIG_FASTBOOT_MBR_NAME "mbr"
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#endif
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#ifndef CONFIG_FASTBOOT_IDBLOCK_NAME
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#define CONFIG_FASTBOOT_IDBLOCK_NAME "idblock"
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#endif
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#define CONFIG_FASTBOOT_MMC_BLOCK_SIZE 512
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#define CONFIG_FASTBOOT_IDBLOCK_SECTOR 64
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/* idblock sector：64 ~ 64 + 5 * 1024(512K for each MiniloadAll.bin) */
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#define CONFIG_FASTBOOT_IDBLOCK_SECTOR_SIZE 5184
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#define BOOT_PARTITION_NAME "boot"
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#define FASTBOOT_MAX_BLK_WRITE 16384
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static ulong timer;
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struct fb_mmc_sparse {
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struct blk_desc *dev_desc;
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};
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static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
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const char *name, disk_partition_t *info)
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{
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int ret;
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ret = part_get_info_by_name(dev_desc, name, info);
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if (ret < 0) {
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/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
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char env_alias_name[25 + 32 + 1];
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char *aliased_part_name;
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/* check for alias */
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strcpy(env_alias_name, "fastboot_partition_alias_");
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strncat(env_alias_name, name, 32);
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aliased_part_name = env_get(env_alias_name);
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if (aliased_part_name != NULL)
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ret = part_get_info_by_name(dev_desc,
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aliased_part_name, info);
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}
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return ret;
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}
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static lbaint_t fb_mmc_blk_write(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer)
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{
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lbaint_t blk = start;
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lbaint_t blks_written;
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lbaint_t cur_blkcnt;
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lbaint_t blks = 0;
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int i;
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for (i = 0; i < blkcnt; i += FASTBOOT_MAX_BLK_WRITE) {
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cur_blkcnt = min((int)blkcnt-i, FASTBOOT_MAX_BLK_WRITE);
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if (buffer != NULL) {
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timed_send_info(&timer, "writing");
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blks_written = blk_dwrite(block_dev, blk, cur_blkcnt,
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buffer+(i*block_dev->blksz));
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} else {
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timed_send_info(&timer, "erasing");
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blks_written = blk_derase(block_dev, blk, cur_blkcnt);
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}
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blk += blks_written;
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blks += blks_written;
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}
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return blks;
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}
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static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
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lbaint_t blk, lbaint_t blkcnt, const void *buffer)
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{
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struct fb_mmc_sparse *sparse = info->priv;
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struct blk_desc *dev_desc = sparse->dev_desc;
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return fb_mmc_blk_write(dev_desc, blk, blkcnt, buffer);
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}
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static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
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lbaint_t blk, lbaint_t blkcnt)
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{
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return blkcnt;
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}
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static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
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const char *part_name, void *buffer,
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unsigned int download_bytes, char *response)
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{
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lbaint_t blkcnt;
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lbaint_t blks;
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/* determine number of blocks to write */
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blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
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blkcnt = lldiv(blkcnt, info->blksz);
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if (blkcnt > info->size) {
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pr_err("too large for partition: '%s'\n", part_name);
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fastboot_fail("too large for partition", response);
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return;
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}
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puts("Flashing Raw Image\n");
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blks = fb_mmc_blk_write(dev_desc, info->start, blkcnt, buffer);
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if (blks != blkcnt) {
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pr_err("failed writing to device %d\n", dev_desc->devnum);
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fastboot_fail("failed writing to device", response);
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return;
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}
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printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
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part_name);
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fastboot_okay("", response);
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}
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#ifdef CONFIG_ANDROID_BOOT_IMAGE
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/**
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* Read Android boot image header from boot partition.
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*
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* @param[in] dev_desc MMC device descriptor
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* @param[in] info Boot partition info
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* @param[out] hdr Where to store read boot image header
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*
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* @return Boot image header sectors count or 0 on error
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*/
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static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
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disk_partition_t *info,
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struct andr_img_hdr *hdr,
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char *response)
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{
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ulong sector_size; /* boot partition sector size */
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lbaint_t hdr_sectors; /* boot image header sectors count */
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int res;
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/* Calculate boot image sectors count */
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sector_size = info->blksz;
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hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_img_hdr), sector_size);
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if (hdr_sectors == 0) {
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pr_err("invalid number of boot sectors: 0");
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fastboot_fail("invalid number of boot sectors: 0", response);
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return 0;
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}
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/* Read the boot image header */
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res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr);
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if (res != hdr_sectors) {
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pr_err("cannot read header from boot partition");
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fastboot_fail("cannot read header from boot partition", response);
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return 0;
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}
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/* Check boot header magic string */
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res = android_image_check_header(hdr);
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if (res != 0) {
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pr_err("bad boot image magic");
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fastboot_fail("boot partition not initialized", response);
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return 0;
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}
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return hdr_sectors;
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}
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/**
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* Write downloaded zImage to boot partition and repack it properly.
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*
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* @param dev_desc MMC device descriptor
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* @param download_buffer Address to fastboot buffer with zImage in it
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* @param download_bytes Size of fastboot buffer, in bytes
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*
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* @return 0 on success or -1 on error
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*/
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static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
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void *download_buffer,
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unsigned int download_bytes,
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char *response)
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{
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uintptr_t hdr_addr; /* boot image header address */
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struct andr_img_hdr *hdr; /* boot image header */
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lbaint_t hdr_sectors; /* boot image header sectors */
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u8 *ramdisk_buffer;
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u32 ramdisk_sector_start;
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u32 ramdisk_sectors;
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u32 kernel_sector_start;
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u32 kernel_sectors;
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u32 sectors_per_page;
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disk_partition_t info;
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int res;
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puts("Flashing zImage\n");
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/* Get boot partition info */
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res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info);
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if (res < 0) {
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pr_err("cannot find boot partition");
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fastboot_fail("cannot find boot partition", response);
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return -1;
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}
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/* Put boot image header in fastboot buffer after downloaded zImage */
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hdr_addr = (uintptr_t)download_buffer + ALIGN(download_bytes, PAGE_SIZE);
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hdr = (struct andr_img_hdr *)hdr_addr;
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/* Read boot image header */
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hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response);
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if (hdr_sectors == 0) {
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pr_err("unable to read boot image header");
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fastboot_fail("unable to read boot image header", response);
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return -1;
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}
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/* Check if boot image has second stage in it (we don't support it) */
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if (hdr->second_size > 0) {
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pr_err("moving second stage is not supported yet");
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fastboot_fail("moving second stage is not supported yet", response);
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return -1;
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}
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/* Extract ramdisk location */
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sectors_per_page = hdr->page_size / info.blksz;
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ramdisk_sector_start = info.start + sectors_per_page;
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ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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ramdisk_sectors = DIV_ROUND_UP(hdr->ramdisk_size, hdr->page_size) *
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sectors_per_page;
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/* Read ramdisk and put it in fastboot buffer after boot image header */
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ramdisk_buffer = (u8 *)hdr + (hdr_sectors * info.blksz);
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res = blk_dread(dev_desc, ramdisk_sector_start, ramdisk_sectors,
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ramdisk_buffer);
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if (res != ramdisk_sectors) {
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pr_err("cannot read ramdisk from boot partition");
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fastboot_fail("cannot read ramdisk from boot partition", response);
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return -1;
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}
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/* Write new kernel size to boot image header */
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hdr->kernel_size = download_bytes;
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res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr);
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if (res == 0) {
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pr_err("cannot writeback boot image header");
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fastboot_fail("cannot write back boot image header", response);
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return -1;
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}
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/* Write the new downloaded kernel */
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kernel_sector_start = info.start + sectors_per_page;
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kernel_sectors = DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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res = blk_dwrite(dev_desc, kernel_sector_start, kernel_sectors,
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download_buffer);
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if (res == 0) {
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pr_err("cannot write new kernel");
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fastboot_fail("cannot write new kernel", response);
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return -1;
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}
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/* Write the saved ramdisk back */
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ramdisk_sector_start = info.start + sectors_per_page;
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ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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res = blk_dwrite(dev_desc, ramdisk_sector_start, ramdisk_sectors,
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ramdisk_buffer);
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if (res == 0) {
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pr_err("cannot write back original ramdisk");
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fastboot_fail("cannot write back original ramdisk", response);
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return -1;
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}
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puts("........ zImage was updated in boot partition\n");
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fastboot_okay("", response);
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return 0;
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}
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#endif
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void fb_mmc_flash_write(const char *cmd, void *download_buffer,
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unsigned int download_bytes, char *response)
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{
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struct blk_desc *dev_desc;
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disk_partition_t info;
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#if CONFIG_IS_ENABLED(EFI_PARTITION)
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u64 disksize = 0;
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char reason[128] = {0};
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#endif
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#ifdef CONFIG_RKIMG_BOOTLOADER
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dev_desc = rockchip_get_bootdev();
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if (!dev_desc) {
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printf("%s: dev_desc is NULL!\n", __func__);
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return;
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}
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#else
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dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
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#endif
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if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
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pr_err("invalid mmc device\n");
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fastboot_fail("invalid mmc device", response);
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return;
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}
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#if CONFIG_IS_ENABLED(EFI_PARTITION)
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if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
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printf("%s: updating MBR, Primary and Backup GPT(s)\n",
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__func__);
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if (is_valid_gpt_buf(dev_desc, download_buffer)) {
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printf("%s: invalid GPT - refusing to write to flash\n",
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__func__);
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disksize = dev_desc->blksz * cpu_to_le64(dev_desc->lba);
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snprintf(reason, ARRAY_SIZE(reason),
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"%s - %s '%lld.%lld MiB')",
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"invalid GPT partition",
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"Actual Disk Size",
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disksize/0x100000,
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disksize%0x100000);
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fastboot_fail(reason, response);
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return;
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}
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if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
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printf("%s: writing GPT partitions failed\n", __func__);
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fastboot_fail(
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"writing GPT partitions failed", response);
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return;
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}
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printf("........ success\n");
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fastboot_okay("", response);
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return;
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}
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#endif
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#if CONFIG_IS_ENABLED(DOS_PARTITION)
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if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
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printf("%s: updating MBR\n", __func__);
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if (is_valid_dos_buf(download_buffer)) {
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printf("%s: invalid MBR - refusing to write to flash\n",
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__func__);
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fastboot_fail("invalid MBR partition", response);
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return;
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}
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if (write_mbr_partition(dev_desc, download_buffer)) {
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printf("%s: writing MBR partition failed\n", __func__);
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fastboot_fail("writing MBR partition failed", response);
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return;
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}
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printf("........ success\n");
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fastboot_okay("", response);
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return;
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}
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#endif
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if (strcmp(cmd, CONFIG_FASTBOOT_IDBLOCK_NAME) == 0) {
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printf("%s: updating IDBLOCK\n", __func__);
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info.blksz = CONFIG_FASTBOOT_MMC_BLOCK_SIZE;
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info.start = CONFIG_FASTBOOT_IDBLOCK_SECTOR;
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info.size = CONFIG_FASTBOOT_IDBLOCK_SECTOR_SIZE;
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goto download;
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}
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#ifdef CONFIG_ANDROID_BOOT_IMAGE
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if (strncasecmp(cmd, "zimage", 6) == 0) {
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fb_mmc_update_zimage(dev_desc, download_buffer, download_bytes, response);
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return;
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}
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#endif
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if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
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pr_err("cannot find partition: '%s'\n", cmd);
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fastboot_fail("cannot find partition", response);
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return;
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}
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download:
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if (is_sparse_image(download_buffer)) {
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struct fb_mmc_sparse sparse_priv;
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struct sparse_storage sparse;
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sparse_priv.dev_desc = dev_desc;
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sparse.blksz = info.blksz;
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sparse.start = info.start;
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sparse.size = info.size;
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sparse.write = fb_mmc_sparse_write;
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sparse.reserve = fb_mmc_sparse_reserve;
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printf("Flashing sparse image at offset " LBAFU "\n",
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sparse.start);
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sparse.priv = &sparse_priv;
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write_sparse_image(&sparse, cmd, download_buffer,
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download_bytes, response);
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} else {
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write_raw_image(dev_desc, &info, cmd, download_buffer,
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download_bytes, response);
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}
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}
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void fb_mmc_erase(const char *cmd, char *response)
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{
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int ret;
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struct blk_desc *dev_desc;
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disk_partition_t info;
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lbaint_t blks, blks_start, blks_size, grp_size;
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struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (mmc == NULL) {
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pr_err("invalid mmc device");
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fastboot_fail("invalid mmc device", response);
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return;
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}
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#ifdef CONFIG_RKIMG_BOOTLOADER
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dev_desc = rockchip_get_bootdev();
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if (!dev_desc) {
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printf("%s: dev_desc is NULL!\n", __func__);
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return;
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}
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#else
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dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
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#endif
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if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
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pr_err("invalid mmc device");
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fastboot_fail("invalid mmc device", response);
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return;
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}
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ret = part_get_info_by_name_or_alias(dev_desc, cmd, &info);
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if (ret < 0) {
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pr_err("cannot find partition: '%s'", cmd);
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fastboot_fail("cannot find partition", response);
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return;
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}
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/* Align blocks to erase group size to avoid erasing other partitions */
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grp_size = mmc->erase_grp_size;
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blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
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if (info.size >= grp_size)
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blks_size = (info.size - (blks_start - info.start)) &
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(~(grp_size - 1));
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else
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blks_size = 0;
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printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
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blks_start, blks_start + blks_size);
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blks = fb_mmc_blk_write(dev_desc, blks_start, blks_size, NULL);
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if (blks != blks_size) {
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pr_err("failed erasing from device %d", dev_desc->devnum);
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fastboot_fail("failed erasing from device", response);
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return;
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}
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printf("........ erased " LBAFU " bytes from '%s'\n",
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blks_size * info.blksz, cmd);
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fastboot_okay("", response);
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}
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lbaint_t fb_mmc_get_erase_grp_size(void)
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{
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lbaint_t grp_size;
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struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (!mmc) {
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pr_err("invalid mmc device");
|
||
return -1;
|
||
}
|
||
|
||
grp_size = mmc->erase_grp_size << 9;
|
||
|
||
return grp_size;
|
||
}
|