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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