LXR uboot/board/emulation/common/qemu

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2020 Linaro Limited
   4 */
   5
   6#include <common.h>
   7#include <dfu.h>
   8#include <env.h>
   9#include <memalign.h>
  10#include <mtd.h>
  11
  12#define DFU_ALT_BUF_LEN         SZ_1K
  13
  14static void board_get_alt_info(struct mtd_info *mtd, char *buf)
  15{
  16        struct mtd_info *part;
  17        bool first = true;
  18        const char *name;
  19        int len, partnum = 0;
  20
  21        name = mtd->name;
  22        len = strlen(buf);
  23
  24        if (buf[0] != '\0')
  25                len += snprintf(buf + len, DFU_ALT_BUF_LEN - len, "&");
  26        len += snprintf(buf + len, DFU_ALT_BUF_LEN - len,
  27                        "mtd %s=", name);
  28
  29        list_for_each_entry(part, &mtd->partitions, node) {
  30                partnum++;
  31                if (!first)
  32                        len += snprintf(buf + len, DFU_ALT_BUF_LEN - len, ";");
  33                first = false;
  34
  35                len += snprintf(buf + len, DFU_ALT_BUF_LEN - len,
  36                                "%s part %d",
  37                                part->name, partnum);
  38        }
  39}
  40
  41void set_dfu_alt_info(char *interface, char *devstr)
  42{
  43        struct mtd_info *mtd;
  44
  45        ALLOC_CACHE_ALIGN_BUFFER(char, buf, DFU_ALT_BUF_LEN);
  46
  47        if (!IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT) &&
  48            env_get("dfu_alt_info"))
  49                return;
  50
  51        memset(buf, 0, sizeof(buf));
  52
  53        /*
  54         * Currently dfu_alt_info is needed on Qemu ARM64 for
  55         * capsule updates
  56        */
  57        if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT) &&
  58            IS_ENABLED(CONFIG_TARGET_QEMU_ARM_64BIT)) {
  59                /* probe all MTD devices */
  60                mtd_probe_devices();
  61
  62                mtd = get_mtd_device_nm("nor0");
  63                if (!IS_ERR_OR_NULL(mtd))
  64                        board_get_alt_info(mtd, buf);
  65        }
  66
  67        env_set("dfu_alt_info", buf);
  68        printf("dfu_alt_info set\n");
  69}
  70