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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
407 lines
9.1 KiB
C
407 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <malloc.h>
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#include <errno.h>
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#include <div64.h>
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#include <dfu.h>
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#include <ext4fs.h>
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#include <fat.h>
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#include <mmc.h>
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static unsigned char *dfu_file_buf;
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static u64 dfu_file_buf_len;
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static long dfu_file_buf_filled;
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static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
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u64 offset, void *buf, long *len)
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{
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struct mmc *mmc;
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u32 blk_start, blk_count, n = 0;
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int ret, part_num_bkp = 0;
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mmc = find_mmc_device(dfu->data.mmc.dev_num);
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if (!mmc) {
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pr_err("Device MMC %d - not found!", dfu->data.mmc.dev_num);
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return -ENODEV;
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}
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/*
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* We must ensure that we work in lba_blk_size chunks, so ALIGN
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* this value.
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*/
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*len = ALIGN(*len, dfu->data.mmc.lba_blk_size);
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blk_start = dfu->data.mmc.lba_start +
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(u32)lldiv(offset, dfu->data.mmc.lba_blk_size);
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blk_count = *len / dfu->data.mmc.lba_blk_size;
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if (blk_start + blk_count >
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dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) {
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puts("Request would exceed designated area!\n");
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return -EINVAL;
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}
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if (dfu->data.mmc.hw_partition >= 0) {
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part_num_bkp = mmc_get_blk_desc(mmc)->hwpart;
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ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
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dfu->data.mmc.dev_num,
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dfu->data.mmc.hw_partition);
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if (ret)
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return ret;
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}
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debug("%s: %s dev: %d start: %d cnt: %d buf: 0x%p\n", __func__,
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op == DFU_OP_READ ? "MMC READ" : "MMC WRITE",
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dfu->data.mmc.dev_num, blk_start, blk_count, buf);
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switch (op) {
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case DFU_OP_READ:
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n = blk_dread(mmc_get_blk_desc(mmc), blk_start, blk_count, buf);
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break;
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case DFU_OP_WRITE:
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n = blk_dwrite(mmc_get_blk_desc(mmc), blk_start, blk_count,
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buf);
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break;
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default:
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pr_err("Operation not supported\n");
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}
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if (n != blk_count) {
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pr_err("MMC operation failed");
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if (dfu->data.mmc.hw_partition >= 0)
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blk_select_hwpart_devnum(IF_TYPE_MMC,
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dfu->data.mmc.dev_num,
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part_num_bkp);
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return -EIO;
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}
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if (dfu->data.mmc.hw_partition >= 0) {
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ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
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dfu->data.mmc.dev_num,
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part_num_bkp);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len)
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{
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if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
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dfu_file_buf_len = 0;
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return -EINVAL;
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}
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/* Add to the current buffer. */
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memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
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dfu_file_buf_len += *len;
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return 0;
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}
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static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
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void *buf, u64 *len)
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{
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const char *fsname, *opname;
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char cmd_buf[DFU_CMD_BUF_SIZE];
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char *str_env;
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int ret;
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switch (dfu->layout) {
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case DFU_FS_FAT:
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fsname = "fat";
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break;
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case DFU_FS_EXT4:
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fsname = "ext4";
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break;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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return -1;
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}
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switch (op) {
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case DFU_OP_READ:
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opname = "load";
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break;
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case DFU_OP_WRITE:
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opname = "write";
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break;
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case DFU_OP_SIZE:
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opname = "size";
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break;
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default:
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return -1;
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}
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sprintf(cmd_buf, "%s%s mmc %d:%d", fsname, opname,
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dfu->data.mmc.dev, dfu->data.mmc.part);
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if (op != DFU_OP_SIZE)
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sprintf(cmd_buf + strlen(cmd_buf), " %p", buf);
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sprintf(cmd_buf + strlen(cmd_buf), " %s", dfu->name);
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if (op == DFU_OP_WRITE)
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sprintf(cmd_buf + strlen(cmd_buf), " %llx", *len);
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debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
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ret = run_command(cmd_buf, 0);
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if (ret) {
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puts("dfu: Read error!\n");
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return ret;
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}
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if (op != DFU_OP_WRITE) {
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str_env = env_get("filesize");
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if (str_env == NULL) {
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puts("dfu: Wrong file size!\n");
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return -1;
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}
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*len = simple_strtoul(str_env, NULL, 16);
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}
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return ret;
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}
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int dfu_write_medium_mmc(struct dfu_entity *dfu,
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u64 offset, void *buf, long *len)
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{
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int ret = -1;
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switch (dfu->layout) {
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case DFU_RAW_ADDR:
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ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
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break;
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case DFU_FS_FAT:
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case DFU_FS_EXT4:
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ret = mmc_file_buffer(dfu, buf, len);
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break;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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}
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return ret;
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}
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int dfu_flush_medium_mmc(struct dfu_entity *dfu)
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{
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int ret = 0;
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if (dfu->layout != DFU_RAW_ADDR) {
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/* Do stuff here. */
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ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf,
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&dfu_file_buf_len);
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/* Now that we're done */
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dfu_file_buf_len = 0;
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}
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return ret;
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}
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int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size)
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{
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int ret;
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switch (dfu->layout) {
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case DFU_RAW_ADDR:
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*size = dfu->data.mmc.lba_size * dfu->data.mmc.lba_blk_size;
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return 0;
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case DFU_FS_FAT:
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case DFU_FS_EXT4:
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dfu_file_buf_filled = -1;
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ret = mmc_file_op(DFU_OP_SIZE, dfu, NULL, size);
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if (ret < 0)
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return ret;
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if (*size > CONFIG_SYS_DFU_MAX_FILE_SIZE)
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return -1;
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return 0;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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return -1;
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}
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}
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static int mmc_file_unbuffer(struct dfu_entity *dfu, u64 offset, void *buf,
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long *len)
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{
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int ret;
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u64 file_len;
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if (dfu_file_buf_filled == -1) {
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ret = mmc_file_op(DFU_OP_READ, dfu, dfu_file_buf, &file_len);
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if (ret < 0)
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return ret;
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dfu_file_buf_filled = file_len;
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}
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if (offset + *len > dfu_file_buf_filled)
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return -EINVAL;
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/* Add to the current buffer. */
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memcpy(buf, dfu_file_buf + offset, *len);
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return 0;
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}
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int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
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long *len)
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{
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int ret = -1;
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switch (dfu->layout) {
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case DFU_RAW_ADDR:
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ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
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break;
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case DFU_FS_FAT:
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case DFU_FS_EXT4:
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ret = mmc_file_unbuffer(dfu, offset, buf, len);
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break;
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default:
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printf("%s: Layout (%s) not (yet) supported!\n", __func__,
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dfu_get_layout(dfu->layout));
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}
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return ret;
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}
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void dfu_free_entity_mmc(struct dfu_entity *dfu)
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{
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if (dfu_file_buf) {
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free(dfu_file_buf);
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dfu_file_buf = NULL;
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}
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}
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/*
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* @param s Parameter string containing space-separated arguments:
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* 1st:
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* raw (raw read/write)
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* fat (files)
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* ext4 (^)
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* part (partition image)
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* 2nd and 3rd:
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* lba_start and lba_size, for raw write
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* mmc_dev and mmc_part, for filesystems and part
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* 4th (optional):
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* mmcpart <num> (access to HW eMMC partitions)
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*/
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int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
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{
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const char *entity_type;
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size_t second_arg;
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size_t third_arg;
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struct mmc *mmc;
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const char *argv[3];
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const char **parg = argv;
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dfu->data.mmc.dev_num = simple_strtoul(devstr, NULL, 10);
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for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
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*parg = strsep(&s, " ");
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if (*parg == NULL) {
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pr_err("Invalid number of arguments.\n");
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return -ENODEV;
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}
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}
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entity_type = argv[0];
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/*
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* Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
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* with default 10.
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*/
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second_arg = simple_strtoul(argv[1], NULL, 0);
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third_arg = simple_strtoul(argv[2], NULL, 0);
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mmc = find_mmc_device(dfu->data.mmc.dev_num);
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if (mmc == NULL) {
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pr_err("Couldn't find MMC device no. %d.\n",
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dfu->data.mmc.dev_num);
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return -ENODEV;
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}
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if (mmc_init(mmc)) {
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pr_err("Couldn't init MMC device.\n");
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return -ENODEV;
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}
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dfu->data.mmc.hw_partition = -EINVAL;
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if (!strcmp(entity_type, "raw")) {
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dfu->layout = DFU_RAW_ADDR;
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dfu->data.mmc.lba_start = second_arg;
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dfu->data.mmc.lba_size = third_arg;
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dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
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/*
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* Check for an extra entry at dfu_alt_info env variable
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* specifying the mmc HW defined partition number
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*/
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if (s)
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if (!strcmp(strsep(&s, " "), "mmcpart"))
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dfu->data.mmc.hw_partition =
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simple_strtoul(s, NULL, 0);
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} else if (!strcmp(entity_type, "part")) {
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disk_partition_t partinfo;
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struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
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int mmcdev = second_arg;
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int mmcpart = third_arg;
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if (part_get_info(blk_dev, mmcpart, &partinfo) != 0) {
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pr_err("Couldn't find part #%d on mmc device #%d\n",
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mmcpart, mmcdev);
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return -ENODEV;
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}
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dfu->layout = DFU_RAW_ADDR;
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dfu->data.mmc.lba_start = partinfo.start;
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dfu->data.mmc.lba_size = partinfo.size;
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dfu->data.mmc.lba_blk_size = partinfo.blksz;
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} else if (!strcmp(entity_type, "fat")) {
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dfu->layout = DFU_FS_FAT;
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} else if (!strcmp(entity_type, "ext4")) {
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dfu->layout = DFU_FS_EXT4;
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} else {
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pr_err("Memory layout (%s) not supported!\n", entity_type);
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return -ENODEV;
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}
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/* if it's NOT a raw write */
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if (strcmp(entity_type, "raw")) {
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dfu->data.mmc.dev = second_arg;
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dfu->data.mmc.part = third_arg;
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}
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dfu->dev_type = DFU_DEV_MMC;
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dfu->get_medium_size = dfu_get_medium_size_mmc;
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dfu->read_medium = dfu_read_medium_mmc;
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dfu->write_medium = dfu_write_medium_mmc;
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dfu->flush_medium = dfu_flush_medium_mmc;
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dfu->inited = 0;
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dfu->free_entity = dfu_free_entity_mmc;
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/* Check if file buffer is ready */
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if (!dfu_file_buf) {
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dfu_file_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
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CONFIG_SYS_DFU_MAX_FILE_SIZE);
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if (!dfu_file_buf) {
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pr_err("Could not memalign 0x%x bytes",
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CONFIG_SYS_DFU_MAX_FILE_SIZE);
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return -ENOMEM;
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}
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}
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return 0;
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}
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